Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1 | /* Type object implementation */ |
| 2 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 3 | #include "Python.h" |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 4 | #include "frameobject.h" |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5 | #include "structmember.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 6 | |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 7 | #include <ctype.h> |
| 8 | |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 9 | |
| 10 | /* Support type attribute cache */ |
| 11 | |
| 12 | /* The cache can keep references to the names alive for longer than |
| 13 | they normally would. This is why the maximum size is limited to |
| 14 | MCACHE_MAX_ATTR_SIZE, since it might be a problem if very large |
| 15 | strings are used as attribute names. */ |
| 16 | #define MCACHE_MAX_ATTR_SIZE 100 |
| 17 | #define MCACHE_SIZE_EXP 10 |
| 18 | #define MCACHE_HASH(version, name_hash) \ |
| 19 | (((unsigned int)(version) * (unsigned int)(name_hash)) \ |
| 20 | >> (8*sizeof(unsigned int) - MCACHE_SIZE_EXP)) |
| 21 | #define MCACHE_HASH_METHOD(type, name) \ |
| 22 | MCACHE_HASH((type)->tp_version_tag, \ |
Georg Brandl | 1bcf35a | 2008-05-25 09:32:09 +0000 | [diff] [blame] | 23 | ((PyUnicodeObject *)(name))->hash) |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 24 | #define MCACHE_CACHEABLE_NAME(name) \ |
Georg Brandl | 1bcf35a | 2008-05-25 09:32:09 +0000 | [diff] [blame] | 25 | PyUnicode_CheckExact(name) && \ |
| 26 | PyUnicode_GET_SIZE(name) <= MCACHE_MAX_ATTR_SIZE |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 27 | |
| 28 | struct method_cache_entry { |
| 29 | unsigned int version; |
| 30 | PyObject *name; /* reference to exactly a str or None */ |
| 31 | PyObject *value; /* borrowed */ |
| 32 | }; |
| 33 | |
| 34 | static struct method_cache_entry method_cache[1 << MCACHE_SIZE_EXP]; |
| 35 | static unsigned int next_version_tag = 0; |
Christian Heimes | 2685563 | 2008-01-27 23:50:43 +0000 | [diff] [blame] | 36 | |
| 37 | unsigned int |
| 38 | PyType_ClearCache(void) |
| 39 | { |
| 40 | Py_ssize_t i; |
| 41 | unsigned int cur_version_tag = next_version_tag - 1; |
| 42 | |
| 43 | for (i = 0; i < (1 << MCACHE_SIZE_EXP); i++) { |
| 44 | method_cache[i].version = 0; |
| 45 | Py_CLEAR(method_cache[i].name); |
| 46 | method_cache[i].value = NULL; |
| 47 | } |
| 48 | next_version_tag = 0; |
| 49 | /* mark all version tags as invalid */ |
Georg Brandl | f08a9dd | 2008-06-10 16:57:31 +0000 | [diff] [blame] | 50 | PyType_Modified(&PyBaseObject_Type); |
Christian Heimes | 2685563 | 2008-01-27 23:50:43 +0000 | [diff] [blame] | 51 | return cur_version_tag; |
| 52 | } |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 53 | |
Georg Brandl | f08a9dd | 2008-06-10 16:57:31 +0000 | [diff] [blame] | 54 | void |
| 55 | PyType_Modified(PyTypeObject *type) |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 56 | { |
| 57 | /* Invalidate any cached data for the specified type and all |
| 58 | subclasses. This function is called after the base |
| 59 | classes, mro, or attributes of the type are altered. |
| 60 | |
| 61 | Invariants: |
| 62 | |
| 63 | - Py_TPFLAGS_VALID_VERSION_TAG is never set if |
| 64 | Py_TPFLAGS_HAVE_VERSION_TAG is not set (e.g. on type |
| 65 | objects coming from non-recompiled extension modules) |
| 66 | |
| 67 | - before Py_TPFLAGS_VALID_VERSION_TAG can be set on a type, |
| 68 | it must first be set on all super types. |
| 69 | |
| 70 | This function clears the Py_TPFLAGS_VALID_VERSION_TAG of a |
| 71 | type (so it must first clear it on all subclasses). The |
| 72 | tp_version_tag value is meaningless unless this flag is set. |
| 73 | We don't assign new version tags eagerly, but only as |
| 74 | needed. |
| 75 | */ |
| 76 | PyObject *raw, *ref; |
| 77 | Py_ssize_t i, n; |
| 78 | |
Christian Heimes | 412dc9c | 2008-01-27 18:55:54 +0000 | [diff] [blame] | 79 | if (!PyType_HasFeature(type, Py_TPFLAGS_VALID_VERSION_TAG)) |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 80 | return; |
| 81 | |
| 82 | raw = type->tp_subclasses; |
| 83 | if (raw != NULL) { |
| 84 | n = PyList_GET_SIZE(raw); |
| 85 | for (i = 0; i < n; i++) { |
| 86 | ref = PyList_GET_ITEM(raw, i); |
| 87 | ref = PyWeakref_GET_OBJECT(ref); |
| 88 | if (ref != Py_None) { |
Georg Brandl | f08a9dd | 2008-06-10 16:57:31 +0000 | [diff] [blame] | 89 | PyType_Modified((PyTypeObject *)ref); |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 90 | } |
| 91 | } |
| 92 | } |
| 93 | type->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG; |
| 94 | } |
| 95 | |
| 96 | static void |
| 97 | type_mro_modified(PyTypeObject *type, PyObject *bases) { |
| 98 | /* |
| 99 | Check that all base classes or elements of the mro of type are |
| 100 | able to be cached. This function is called after the base |
| 101 | classes or mro of the type are altered. |
| 102 | |
| 103 | Unset HAVE_VERSION_TAG and VALID_VERSION_TAG if the type |
| 104 | inherits from an old-style class, either directly or if it |
| 105 | appears in the MRO of a new-style class. No support either for |
| 106 | custom MROs that include types that are not officially super |
| 107 | types. |
| 108 | |
| 109 | Called from mro_internal, which will subsequently be called on |
| 110 | each subclass when their mro is recursively updated. |
| 111 | */ |
| 112 | Py_ssize_t i, n; |
| 113 | int clear = 0; |
| 114 | |
Christian Heimes | 412dc9c | 2008-01-27 18:55:54 +0000 | [diff] [blame] | 115 | if (!PyType_HasFeature(type, Py_TPFLAGS_HAVE_VERSION_TAG)) |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 116 | return; |
| 117 | |
| 118 | n = PyTuple_GET_SIZE(bases); |
| 119 | for (i = 0; i < n; i++) { |
| 120 | PyObject *b = PyTuple_GET_ITEM(bases, i); |
| 121 | PyTypeObject *cls; |
| 122 | |
| 123 | if (!PyType_Check(b) ) { |
| 124 | clear = 1; |
| 125 | break; |
| 126 | } |
| 127 | |
| 128 | cls = (PyTypeObject *)b; |
| 129 | |
| 130 | if (!PyType_HasFeature(cls, Py_TPFLAGS_HAVE_VERSION_TAG) || |
| 131 | !PyType_IsSubtype(type, cls)) { |
| 132 | clear = 1; |
| 133 | break; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | if (clear) |
| 138 | type->tp_flags &= ~(Py_TPFLAGS_HAVE_VERSION_TAG| |
| 139 | Py_TPFLAGS_VALID_VERSION_TAG); |
| 140 | } |
| 141 | |
| 142 | static int |
| 143 | assign_version_tag(PyTypeObject *type) |
| 144 | { |
| 145 | /* Ensure that the tp_version_tag is valid and set |
| 146 | Py_TPFLAGS_VALID_VERSION_TAG. To respect the invariant, this |
| 147 | must first be done on all super classes. Return 0 if this |
| 148 | cannot be done, 1 if Py_TPFLAGS_VALID_VERSION_TAG. |
| 149 | */ |
| 150 | Py_ssize_t i, n; |
| 151 | PyObject *bases; |
| 152 | |
| 153 | if (PyType_HasFeature(type, Py_TPFLAGS_VALID_VERSION_TAG)) |
| 154 | return 1; |
| 155 | if (!PyType_HasFeature(type, Py_TPFLAGS_HAVE_VERSION_TAG)) |
| 156 | return 0; |
| 157 | if (!PyType_HasFeature(type, Py_TPFLAGS_READY)) |
| 158 | return 0; |
| 159 | |
| 160 | type->tp_version_tag = next_version_tag++; |
| 161 | /* for stress-testing: next_version_tag &= 0xFF; */ |
| 162 | |
| 163 | if (type->tp_version_tag == 0) { |
| 164 | /* wrap-around or just starting Python - clear the whole |
| 165 | cache by filling names with references to Py_None. |
| 166 | Values are also set to NULL for added protection, as they |
| 167 | are borrowed reference */ |
| 168 | for (i = 0; i < (1 << MCACHE_SIZE_EXP); i++) { |
| 169 | method_cache[i].value = NULL; |
| 170 | Py_XDECREF(method_cache[i].name); |
| 171 | method_cache[i].name = Py_None; |
| 172 | Py_INCREF(Py_None); |
| 173 | } |
| 174 | /* mark all version tags as invalid */ |
Georg Brandl | f08a9dd | 2008-06-10 16:57:31 +0000 | [diff] [blame] | 175 | PyType_Modified(&PyBaseObject_Type); |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 176 | return 1; |
| 177 | } |
| 178 | bases = type->tp_bases; |
| 179 | n = PyTuple_GET_SIZE(bases); |
| 180 | for (i = 0; i < n; i++) { |
| 181 | PyObject *b = PyTuple_GET_ITEM(bases, i); |
| 182 | assert(PyType_Check(b)); |
| 183 | if (!assign_version_tag((PyTypeObject *)b)) |
| 184 | return 0; |
| 185 | } |
| 186 | type->tp_flags |= Py_TPFLAGS_VALID_VERSION_TAG; |
| 187 | return 1; |
| 188 | } |
| 189 | |
| 190 | |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 191 | static PyMemberDef type_members[] = { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 192 | {"__basicsize__", T_INT, offsetof(PyTypeObject,tp_basicsize),READONLY}, |
| 193 | {"__itemsize__", T_INT, offsetof(PyTypeObject, tp_itemsize), READONLY}, |
| 194 | {"__flags__", T_LONG, offsetof(PyTypeObject, tp_flags), READONLY}, |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 195 | {"__weakrefoffset__", T_LONG, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 196 | offsetof(PyTypeObject, tp_weaklistoffset), READONLY}, |
| 197 | {"__base__", T_OBJECT, offsetof(PyTypeObject, tp_base), READONLY}, |
| 198 | {"__dictoffset__", T_LONG, |
| 199 | offsetof(PyTypeObject, tp_dictoffset), READONLY}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 200 | {"__mro__", T_OBJECT, offsetof(PyTypeObject, tp_mro), READONLY}, |
| 201 | {0} |
| 202 | }; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 203 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 204 | static PyObject * |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 205 | type_name(PyTypeObject *type, void *context) |
| 206 | { |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 207 | const char *s; |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 208 | |
Michael W. Hudson | ade8c8b2 | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 209 | if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) { |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 210 | PyHeapTypeObject* et = (PyHeapTypeObject*)type; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 211 | |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 212 | Py_INCREF(et->ht_name); |
| 213 | return et->ht_name; |
Michael W. Hudson | ade8c8b2 | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 214 | } |
| 215 | else { |
| 216 | s = strrchr(type->tp_name, '.'); |
| 217 | if (s == NULL) |
| 218 | s = type->tp_name; |
| 219 | else |
| 220 | s++; |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 221 | return PyUnicode_FromString(s); |
Michael W. Hudson | ade8c8b2 | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 222 | } |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 223 | } |
| 224 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 225 | static int |
| 226 | type_set_name(PyTypeObject *type, PyObject *value, void *context) |
| 227 | { |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 228 | PyHeapTypeObject* et; |
Neal Norwitz | 80e7f27 | 2007-08-26 06:45:23 +0000 | [diff] [blame] | 229 | char *tp_name; |
Guido van Rossum | e845c0f | 2007-11-02 23:07:07 +0000 | [diff] [blame] | 230 | PyObject *tmp; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 231 | |
| 232 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
| 233 | PyErr_Format(PyExc_TypeError, |
| 234 | "can't set %s.__name__", type->tp_name); |
| 235 | return -1; |
| 236 | } |
| 237 | if (!value) { |
| 238 | PyErr_Format(PyExc_TypeError, |
| 239 | "can't delete %s.__name__", type->tp_name); |
| 240 | return -1; |
| 241 | } |
Neal Norwitz | 6ea45d3 | 2007-08-26 04:19:43 +0000 | [diff] [blame] | 242 | if (!PyUnicode_Check(value)) { |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 243 | PyErr_Format(PyExc_TypeError, |
| 244 | "can only assign string to %s.__name__, not '%s'", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 245 | type->tp_name, Py_TYPE(value)->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 246 | return -1; |
| 247 | } |
Guido van Rossum | e845c0f | 2007-11-02 23:07:07 +0000 | [diff] [blame] | 248 | |
| 249 | /* Check absence of null characters */ |
| 250 | tmp = PyUnicode_FromStringAndSize("\0", 1); |
| 251 | if (tmp == NULL) |
Neal Norwitz | 6ea45d3 | 2007-08-26 04:19:43 +0000 | [diff] [blame] | 252 | return -1; |
Guido van Rossum | e845c0f | 2007-11-02 23:07:07 +0000 | [diff] [blame] | 253 | if (PyUnicode_Contains(value, tmp) != 0) { |
| 254 | Py_DECREF(tmp); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 255 | PyErr_Format(PyExc_ValueError, |
| 256 | "__name__ must not contain null bytes"); |
| 257 | return -1; |
| 258 | } |
Guido van Rossum | e845c0f | 2007-11-02 23:07:07 +0000 | [diff] [blame] | 259 | Py_DECREF(tmp); |
| 260 | |
Marc-André Lemburg | 4cc0f24 | 2008-08-07 18:54:33 +0000 | [diff] [blame] | 261 | tp_name = _PyUnicode_AsString(value); |
Guido van Rossum | e845c0f | 2007-11-02 23:07:07 +0000 | [diff] [blame] | 262 | if (tp_name == NULL) |
| 263 | return -1; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 264 | |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 265 | et = (PyHeapTypeObject*)type; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 266 | |
| 267 | Py_INCREF(value); |
| 268 | |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 269 | Py_DECREF(et->ht_name); |
| 270 | et->ht_name = value; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 271 | |
Neal Norwitz | 80e7f27 | 2007-08-26 06:45:23 +0000 | [diff] [blame] | 272 | type->tp_name = tp_name; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 273 | |
| 274 | return 0; |
| 275 | } |
| 276 | |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 277 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 278 | type_module(PyTypeObject *type, void *context) |
Guido van Rossum | 29ca26e | 1995-01-07 11:58:15 +0000 | [diff] [blame] | 279 | { |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 280 | PyObject *mod; |
| 281 | char *s; |
| 282 | |
Michael W. Hudson | ade8c8b2 | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 283 | if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) { |
| 284 | mod = PyDict_GetItemString(type->tp_dict, "__module__"); |
Anthony Baxter | 3ecdb25 | 2004-06-11 14:41:18 +0000 | [diff] [blame] | 285 | if (!mod) { |
| 286 | PyErr_Format(PyExc_AttributeError, "__module__"); |
| 287 | return 0; |
| 288 | } |
Michael W. Hudson | ade8c8b2 | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 289 | Py_XINCREF(mod); |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 290 | return mod; |
| 291 | } |
Michael W. Hudson | ade8c8b2 | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 292 | else { |
| 293 | s = strrchr(type->tp_name, '.'); |
| 294 | if (s != NULL) |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 295 | return PyUnicode_FromStringAndSize( |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 296 | type->tp_name, (Py_ssize_t)(s - type->tp_name)); |
Georg Brandl | 1a3284e | 2007-12-02 09:40:06 +0000 | [diff] [blame] | 297 | return PyUnicode_FromString("builtins"); |
Michael W. Hudson | ade8c8b2 | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 298 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 299 | } |
| 300 | |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 301 | static int |
| 302 | type_set_module(PyTypeObject *type, PyObject *value, void *context) |
| 303 | { |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 304 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 305 | PyErr_Format(PyExc_TypeError, |
| 306 | "can't set %s.__module__", type->tp_name); |
| 307 | return -1; |
| 308 | } |
| 309 | if (!value) { |
| 310 | PyErr_Format(PyExc_TypeError, |
| 311 | "can't delete %s.__module__", type->tp_name); |
| 312 | return -1; |
| 313 | } |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 314 | |
Georg Brandl | f08a9dd | 2008-06-10 16:57:31 +0000 | [diff] [blame] | 315 | PyType_Modified(type); |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 316 | |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 317 | return PyDict_SetItemString(type->tp_dict, "__module__", value); |
| 318 | } |
| 319 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 320 | static PyObject * |
Christian Heimes | 9e7f1d2 | 2008-02-28 12:27:11 +0000 | [diff] [blame] | 321 | type_abstractmethods(PyTypeObject *type, void *context) |
| 322 | { |
| 323 | PyObject *mod = PyDict_GetItemString(type->tp_dict, |
| 324 | "__abstractmethods__"); |
| 325 | if (!mod) { |
| 326 | PyErr_Format(PyExc_AttributeError, "__abstractmethods__"); |
| 327 | return NULL; |
| 328 | } |
| 329 | Py_XINCREF(mod); |
| 330 | return mod; |
| 331 | } |
| 332 | |
| 333 | static int |
| 334 | type_set_abstractmethods(PyTypeObject *type, PyObject *value, void *context) |
| 335 | { |
| 336 | /* __abstractmethods__ should only be set once on a type, in |
| 337 | abc.ABCMeta.__new__, so this function doesn't do anything |
| 338 | special to update subclasses. |
| 339 | */ |
| 340 | int res = PyDict_SetItemString(type->tp_dict, |
| 341 | "__abstractmethods__", value); |
| 342 | if (res == 0) { |
Georg Brandl | f08a9dd | 2008-06-10 16:57:31 +0000 | [diff] [blame] | 343 | PyType_Modified(type); |
Christian Heimes | 9e7f1d2 | 2008-02-28 12:27:11 +0000 | [diff] [blame] | 344 | if (value && PyObject_IsTrue(value)) { |
| 345 | type->tp_flags |= Py_TPFLAGS_IS_ABSTRACT; |
| 346 | } |
| 347 | else { |
| 348 | type->tp_flags &= ~Py_TPFLAGS_IS_ABSTRACT; |
| 349 | } |
| 350 | } |
| 351 | return res; |
| 352 | } |
| 353 | |
| 354 | static PyObject * |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 355 | type_get_bases(PyTypeObject *type, void *context) |
| 356 | { |
| 357 | Py_INCREF(type->tp_bases); |
| 358 | return type->tp_bases; |
| 359 | } |
| 360 | |
| 361 | static PyTypeObject *best_base(PyObject *); |
| 362 | static int mro_internal(PyTypeObject *); |
| 363 | static int compatible_for_assignment(PyTypeObject *, PyTypeObject *, char *); |
| 364 | static int add_subclass(PyTypeObject*, PyTypeObject*); |
| 365 | static void remove_subclass(PyTypeObject *, PyTypeObject *); |
| 366 | static void update_all_slots(PyTypeObject *); |
| 367 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 368 | typedef int (*update_callback)(PyTypeObject *, void *); |
| 369 | static int update_subclasses(PyTypeObject *type, PyObject *name, |
| 370 | update_callback callback, void *data); |
| 371 | static int recurse_down_subclasses(PyTypeObject *type, PyObject *name, |
| 372 | update_callback callback, void *data); |
| 373 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 374 | static int |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 375 | mro_subclasses(PyTypeObject *type, PyObject* temp) |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 376 | { |
| 377 | PyTypeObject *subclass; |
| 378 | PyObject *ref, *subclasses, *old_mro; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 379 | Py_ssize_t i, n; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 380 | |
| 381 | subclasses = type->tp_subclasses; |
| 382 | if (subclasses == NULL) |
| 383 | return 0; |
| 384 | assert(PyList_Check(subclasses)); |
| 385 | n = PyList_GET_SIZE(subclasses); |
| 386 | for (i = 0; i < n; i++) { |
| 387 | ref = PyList_GET_ITEM(subclasses, i); |
| 388 | assert(PyWeakref_CheckRef(ref)); |
| 389 | subclass = (PyTypeObject *)PyWeakref_GET_OBJECT(ref); |
| 390 | assert(subclass != NULL); |
| 391 | if ((PyObject *)subclass == Py_None) |
| 392 | continue; |
| 393 | assert(PyType_Check(subclass)); |
| 394 | old_mro = subclass->tp_mro; |
| 395 | if (mro_internal(subclass) < 0) { |
| 396 | subclass->tp_mro = old_mro; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 397 | return -1; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 398 | } |
| 399 | else { |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 400 | PyObject* tuple; |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 401 | tuple = PyTuple_Pack(2, subclass, old_mro); |
Guido van Rossum | 19a02ba | 2003-04-15 22:09:45 +0000 | [diff] [blame] | 402 | Py_DECREF(old_mro); |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 403 | if (!tuple) |
| 404 | return -1; |
| 405 | if (PyList_Append(temp, tuple) < 0) |
| 406 | return -1; |
Guido van Rossum | 19a02ba | 2003-04-15 22:09:45 +0000 | [diff] [blame] | 407 | Py_DECREF(tuple); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 408 | } |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 409 | if (mro_subclasses(subclass, temp) < 0) |
| 410 | return -1; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 411 | } |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 412 | return 0; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 413 | } |
| 414 | |
| 415 | static int |
| 416 | type_set_bases(PyTypeObject *type, PyObject *value, void *context) |
| 417 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 418 | Py_ssize_t i; |
| 419 | int r = 0; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 420 | PyObject *ob, *temp; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 421 | PyTypeObject *new_base, *old_base; |
| 422 | PyObject *old_bases, *old_mro; |
| 423 | |
| 424 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
| 425 | PyErr_Format(PyExc_TypeError, |
| 426 | "can't set %s.__bases__", type->tp_name); |
| 427 | return -1; |
| 428 | } |
| 429 | if (!value) { |
| 430 | PyErr_Format(PyExc_TypeError, |
| 431 | "can't delete %s.__bases__", type->tp_name); |
| 432 | return -1; |
| 433 | } |
| 434 | if (!PyTuple_Check(value)) { |
| 435 | PyErr_Format(PyExc_TypeError, |
| 436 | "can only assign tuple to %s.__bases__, not %s", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 437 | type->tp_name, Py_TYPE(value)->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 438 | return -1; |
| 439 | } |
Guido van Rossum | 3bbc0ee | 2002-12-13 17:49:38 +0000 | [diff] [blame] | 440 | if (PyTuple_GET_SIZE(value) == 0) { |
| 441 | PyErr_Format(PyExc_TypeError, |
| 442 | "can only assign non-empty tuple to %s.__bases__, not ()", |
| 443 | type->tp_name); |
| 444 | return -1; |
| 445 | } |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 446 | for (i = 0; i < PyTuple_GET_SIZE(value); i++) { |
| 447 | ob = PyTuple_GET_ITEM(value, i); |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 448 | if (!PyType_Check(ob)) { |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 449 | PyErr_Format( |
| 450 | PyExc_TypeError, |
| 451 | "%s.__bases__ must be tuple of old- or new-style classes, not '%s'", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 452 | type->tp_name, Py_TYPE(ob)->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 453 | return -1; |
| 454 | } |
Michael W. Hudson | caf17be | 2002-11-27 10:24:44 +0000 | [diff] [blame] | 455 | if (PyType_Check(ob)) { |
| 456 | if (PyType_IsSubtype((PyTypeObject*)ob, type)) { |
| 457 | PyErr_SetString(PyExc_TypeError, |
| 458 | "a __bases__ item causes an inheritance cycle"); |
| 459 | return -1; |
| 460 | } |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 461 | } |
| 462 | } |
| 463 | |
| 464 | new_base = best_base(value); |
| 465 | |
| 466 | if (!new_base) { |
| 467 | return -1; |
| 468 | } |
| 469 | |
| 470 | if (!compatible_for_assignment(type->tp_base, new_base, "__bases__")) |
| 471 | return -1; |
| 472 | |
| 473 | Py_INCREF(new_base); |
| 474 | Py_INCREF(value); |
| 475 | |
| 476 | old_bases = type->tp_bases; |
| 477 | old_base = type->tp_base; |
| 478 | old_mro = type->tp_mro; |
| 479 | |
| 480 | type->tp_bases = value; |
| 481 | type->tp_base = new_base; |
| 482 | |
| 483 | if (mro_internal(type) < 0) { |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 484 | goto bail; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 485 | } |
| 486 | |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 487 | temp = PyList_New(0); |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 488 | if (!temp) |
| 489 | goto bail; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 490 | |
| 491 | r = mro_subclasses(type, temp); |
| 492 | |
| 493 | if (r < 0) { |
| 494 | for (i = 0; i < PyList_Size(temp); i++) { |
| 495 | PyTypeObject* cls; |
| 496 | PyObject* mro; |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 497 | PyArg_UnpackTuple(PyList_GET_ITEM(temp, i), |
| 498 | "", 2, 2, &cls, &mro); |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 499 | Py_INCREF(mro); |
| 500 | ob = cls->tp_mro; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 501 | cls->tp_mro = mro; |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 502 | Py_DECREF(ob); |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 503 | } |
| 504 | Py_DECREF(temp); |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 505 | goto bail; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 506 | } |
| 507 | |
| 508 | Py_DECREF(temp); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 509 | |
| 510 | /* any base that was in __bases__ but now isn't, we |
Raymond Hettinger | a828586 | 2002-12-14 17:17:56 +0000 | [diff] [blame] | 511 | need to remove |type| from its tp_subclasses. |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 512 | conversely, any class now in __bases__ that wasn't |
Raymond Hettinger | a828586 | 2002-12-14 17:17:56 +0000 | [diff] [blame] | 513 | needs to have |type| added to its subclasses. */ |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 514 | |
| 515 | /* for now, sod that: just remove from all old_bases, |
| 516 | add to all new_bases */ |
| 517 | |
| 518 | for (i = PyTuple_GET_SIZE(old_bases) - 1; i >= 0; i--) { |
| 519 | ob = PyTuple_GET_ITEM(old_bases, i); |
| 520 | if (PyType_Check(ob)) { |
| 521 | remove_subclass( |
| 522 | (PyTypeObject*)ob, type); |
| 523 | } |
| 524 | } |
| 525 | |
| 526 | for (i = PyTuple_GET_SIZE(value) - 1; i >= 0; i--) { |
| 527 | ob = PyTuple_GET_ITEM(value, i); |
| 528 | if (PyType_Check(ob)) { |
| 529 | if (add_subclass((PyTypeObject*)ob, type) < 0) |
| 530 | r = -1; |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | update_all_slots(type); |
| 535 | |
| 536 | Py_DECREF(old_bases); |
| 537 | Py_DECREF(old_base); |
| 538 | Py_DECREF(old_mro); |
| 539 | |
| 540 | return r; |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 541 | |
| 542 | bail: |
Michael W. Hudson | e723e45 | 2003-08-07 14:58:10 +0000 | [diff] [blame] | 543 | Py_DECREF(type->tp_bases); |
| 544 | Py_DECREF(type->tp_base); |
| 545 | if (type->tp_mro != old_mro) { |
| 546 | Py_DECREF(type->tp_mro); |
| 547 | } |
| 548 | |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 549 | type->tp_bases = old_bases; |
| 550 | type->tp_base = old_base; |
| 551 | type->tp_mro = old_mro; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 552 | |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 553 | return -1; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 554 | } |
| 555 | |
| 556 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 557 | type_dict(PyTypeObject *type, void *context) |
| 558 | { |
| 559 | if (type->tp_dict == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 560 | Py_INCREF(Py_None); |
| 561 | return Py_None; |
Guido van Rossum | 29ca26e | 1995-01-07 11:58:15 +0000 | [diff] [blame] | 562 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 563 | return PyDictProxy_New(type->tp_dict); |
Guido van Rossum | 29ca26e | 1995-01-07 11:58:15 +0000 | [diff] [blame] | 564 | } |
| 565 | |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 566 | static PyObject * |
| 567 | type_get_doc(PyTypeObject *type, void *context) |
| 568 | { |
| 569 | PyObject *result; |
Guido van Rossum | 6ca7d41 | 2002-04-18 00:22:00 +0000 | [diff] [blame] | 570 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE) && type->tp_doc != NULL) |
Neal Norwitz | a369c5a | 2007-08-25 07:41:59 +0000 | [diff] [blame] | 571 | return PyUnicode_FromString(type->tp_doc); |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 572 | result = PyDict_GetItemString(type->tp_dict, "__doc__"); |
Guido van Rossum | 6ca7d41 | 2002-04-18 00:22:00 +0000 | [diff] [blame] | 573 | if (result == NULL) { |
| 574 | result = Py_None; |
| 575 | Py_INCREF(result); |
| 576 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 577 | else if (Py_TYPE(result)->tp_descr_get) { |
| 578 | result = Py_TYPE(result)->tp_descr_get(result, NULL, |
Tim Peters | 2b85897 | 2002-04-18 04:12:28 +0000 | [diff] [blame] | 579 | (PyObject *)type); |
Guido van Rossum | 6ca7d41 | 2002-04-18 00:22:00 +0000 | [diff] [blame] | 580 | } |
| 581 | else { |
| 582 | Py_INCREF(result); |
| 583 | } |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 584 | return result; |
| 585 | } |
| 586 | |
Antoine Pitrou | ec569b7 | 2008-08-26 22:40:48 +0000 | [diff] [blame] | 587 | static PyObject * |
| 588 | type___instancecheck__(PyObject *type, PyObject *inst) |
| 589 | { |
| 590 | switch (_PyObject_RealIsInstance(inst, type)) { |
| 591 | case -1: |
| 592 | return NULL; |
| 593 | case 0: |
| 594 | Py_RETURN_FALSE; |
| 595 | default: |
| 596 | Py_RETURN_TRUE; |
| 597 | } |
| 598 | } |
| 599 | |
| 600 | |
| 601 | static PyObject * |
Antoine Pitrou | ec569b7 | 2008-08-26 22:40:48 +0000 | [diff] [blame] | 602 | type___subclasscheck__(PyObject *type, PyObject *inst) |
| 603 | { |
| 604 | switch (_PyObject_RealIsSubclass(inst, type)) { |
| 605 | case -1: |
| 606 | return NULL; |
| 607 | case 0: |
| 608 | Py_RETURN_FALSE; |
| 609 | default: |
| 610 | Py_RETURN_TRUE; |
| 611 | } |
| 612 | } |
| 613 | |
Antoine Pitrou | ec569b7 | 2008-08-26 22:40:48 +0000 | [diff] [blame] | 614 | |
Neil Schemenauer | f23473f | 2001-10-21 22:28:58 +0000 | [diff] [blame] | 615 | static PyGetSetDef type_getsets[] = { |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 616 | {"__name__", (getter)type_name, (setter)type_set_name, NULL}, |
| 617 | {"__bases__", (getter)type_get_bases, (setter)type_set_bases, NULL}, |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 618 | {"__module__", (getter)type_module, (setter)type_set_module, NULL}, |
Christian Heimes | 9e7f1d2 | 2008-02-28 12:27:11 +0000 | [diff] [blame] | 619 | {"__abstractmethods__", (getter)type_abstractmethods, |
| 620 | (setter)type_set_abstractmethods, NULL}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 621 | {"__dict__", (getter)type_dict, NULL, NULL}, |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 622 | {"__doc__", (getter)type_get_doc, NULL, NULL}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 623 | {0} |
| 624 | }; |
| 625 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 626 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 627 | type_repr(PyTypeObject *type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 628 | { |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 629 | PyObject *mod, *name, *rtn; |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 630 | |
| 631 | mod = type_module(type, NULL); |
| 632 | if (mod == NULL) |
| 633 | PyErr_Clear(); |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 634 | else if (!PyUnicode_Check(mod)) { |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 635 | Py_DECREF(mod); |
| 636 | mod = NULL; |
| 637 | } |
| 638 | name = type_name(type, NULL); |
| 639 | if (name == NULL) |
| 640 | return NULL; |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 641 | |
Georg Brandl | 1a3284e | 2007-12-02 09:40:06 +0000 | [diff] [blame] | 642 | if (mod != NULL && PyUnicode_CompareWithASCIIString(mod, "builtins")) |
Martin v. Löwis | 250ad61 | 2008-04-07 05:43:42 +0000 | [diff] [blame] | 643 | rtn = PyUnicode_FromFormat("<class '%U.%U'>", mod, name); |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 644 | else |
Martin v. Löwis | 250ad61 | 2008-04-07 05:43:42 +0000 | [diff] [blame] | 645 | rtn = PyUnicode_FromFormat("<class '%s'>", type->tp_name); |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 646 | |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 647 | Py_XDECREF(mod); |
| 648 | Py_DECREF(name); |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 649 | return rtn; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 650 | } |
| 651 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 652 | static PyObject * |
| 653 | type_call(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 654 | { |
| 655 | PyObject *obj; |
| 656 | |
| 657 | if (type->tp_new == NULL) { |
| 658 | PyErr_Format(PyExc_TypeError, |
| 659 | "cannot create '%.100s' instances", |
| 660 | type->tp_name); |
| 661 | return NULL; |
| 662 | } |
| 663 | |
Tim Peters | 3f996e7 | 2001-09-13 19:18:27 +0000 | [diff] [blame] | 664 | obj = type->tp_new(type, args, kwds); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 665 | if (obj != NULL) { |
Guido van Rossum | f76de62 | 2001-10-18 15:49:21 +0000 | [diff] [blame] | 666 | /* Ugly exception: when the call was type(something), |
| 667 | don't call tp_init on the result. */ |
| 668 | if (type == &PyType_Type && |
| 669 | PyTuple_Check(args) && PyTuple_GET_SIZE(args) == 1 && |
| 670 | (kwds == NULL || |
| 671 | (PyDict_Check(kwds) && PyDict_Size(kwds) == 0))) |
| 672 | return obj; |
Guido van Rossum | 8ace1ab | 2002-04-06 01:05:01 +0000 | [diff] [blame] | 673 | /* If the returned object is not an instance of type, |
| 674 | it won't be initialized. */ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 675 | if (!PyType_IsSubtype(Py_TYPE(obj), type)) |
Guido van Rossum | 8ace1ab | 2002-04-06 01:05:01 +0000 | [diff] [blame] | 676 | return obj; |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 677 | type = Py_TYPE(obj); |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 678 | if (type->tp_init != NULL && |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 679 | type->tp_init(obj, args, kwds) < 0) { |
| 680 | Py_DECREF(obj); |
| 681 | obj = NULL; |
| 682 | } |
| 683 | } |
| 684 | return obj; |
| 685 | } |
| 686 | |
| 687 | PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 688 | PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 689 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 690 | PyObject *obj; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 691 | const size_t size = _PyObject_VAR_SIZE(type, nitems+1); |
| 692 | /* note that we need to add one, for the sentinel */ |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 693 | |
| 694 | if (PyType_IS_GC(type)) |
Neil Schemenauer | 09a2ae5 | 2002-04-12 03:06:53 +0000 | [diff] [blame] | 695 | obj = _PyObject_GC_Malloc(size); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 696 | else |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 697 | obj = (PyObject *)PyObject_MALLOC(size); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 698 | |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 699 | if (obj == NULL) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 700 | return PyErr_NoMemory(); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 701 | |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 702 | memset(obj, '\0', size); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 703 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 704 | if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
| 705 | Py_INCREF(type); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 706 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 707 | if (type->tp_itemsize == 0) |
| 708 | PyObject_INIT(obj, type); |
| 709 | else |
| 710 | (void) PyObject_INIT_VAR((PyVarObject *)obj, type, nitems); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 711 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 712 | if (PyType_IS_GC(type)) |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 713 | _PyObject_GC_TRACK(obj); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 714 | return obj; |
| 715 | } |
| 716 | |
| 717 | PyObject * |
| 718 | PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 719 | { |
| 720 | return type->tp_alloc(type, 0); |
| 721 | } |
| 722 | |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 723 | /* Helpers for subtyping */ |
| 724 | |
| 725 | static int |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 726 | traverse_slots(PyTypeObject *type, PyObject *self, visitproc visit, void *arg) |
| 727 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 728 | Py_ssize_t i, n; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 729 | PyMemberDef *mp; |
| 730 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 731 | n = Py_SIZE(type); |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 732 | mp = PyHeapType_GET_MEMBERS((PyHeapTypeObject *)type); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 733 | for (i = 0; i < n; i++, mp++) { |
| 734 | if (mp->type == T_OBJECT_EX) { |
| 735 | char *addr = (char *)self + mp->offset; |
| 736 | PyObject *obj = *(PyObject **)addr; |
| 737 | if (obj != NULL) { |
| 738 | int err = visit(obj, arg); |
| 739 | if (err) |
| 740 | return err; |
| 741 | } |
| 742 | } |
| 743 | } |
| 744 | return 0; |
| 745 | } |
| 746 | |
| 747 | static int |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 748 | subtype_traverse(PyObject *self, visitproc visit, void *arg) |
| 749 | { |
| 750 | PyTypeObject *type, *base; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 751 | traverseproc basetraverse; |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 752 | |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 753 | /* Find the nearest base with a different tp_traverse, |
| 754 | and traverse slots while we're at it */ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 755 | type = Py_TYPE(self); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 756 | base = type; |
| 757 | while ((basetraverse = base->tp_traverse) == subtype_traverse) { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 758 | if (Py_SIZE(base)) { |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 759 | int err = traverse_slots(base, self, visit, arg); |
| 760 | if (err) |
| 761 | return err; |
| 762 | } |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 763 | base = base->tp_base; |
| 764 | assert(base); |
| 765 | } |
| 766 | |
| 767 | if (type->tp_dictoffset != base->tp_dictoffset) { |
| 768 | PyObject **dictptr = _PyObject_GetDictPtr(self); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 769 | if (dictptr && *dictptr) |
| 770 | Py_VISIT(*dictptr); |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 771 | } |
| 772 | |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 773 | if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 774 | /* For a heaptype, the instances count as references |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 775 | to the type. Traverse the type so the collector |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 776 | can find cycles involving this link. */ |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 777 | Py_VISIT(type); |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 778 | |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 779 | if (basetraverse) |
| 780 | return basetraverse(self, visit, arg); |
| 781 | return 0; |
| 782 | } |
| 783 | |
| 784 | static void |
| 785 | clear_slots(PyTypeObject *type, PyObject *self) |
| 786 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 787 | Py_ssize_t i, n; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 788 | PyMemberDef *mp; |
| 789 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 790 | n = Py_SIZE(type); |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 791 | mp = PyHeapType_GET_MEMBERS((PyHeapTypeObject *)type); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 792 | for (i = 0; i < n; i++, mp++) { |
| 793 | if (mp->type == T_OBJECT_EX && !(mp->flags & READONLY)) { |
| 794 | char *addr = (char *)self + mp->offset; |
| 795 | PyObject *obj = *(PyObject **)addr; |
| 796 | if (obj != NULL) { |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 797 | *(PyObject **)addr = NULL; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 798 | Py_DECREF(obj); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 799 | } |
| 800 | } |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | static int |
| 805 | subtype_clear(PyObject *self) |
| 806 | { |
| 807 | PyTypeObject *type, *base; |
| 808 | inquiry baseclear; |
| 809 | |
| 810 | /* Find the nearest base with a different tp_clear |
| 811 | and clear slots while we're at it */ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 812 | type = Py_TYPE(self); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 813 | base = type; |
| 814 | while ((baseclear = base->tp_clear) == subtype_clear) { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 815 | if (Py_SIZE(base)) |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 816 | clear_slots(base, self); |
| 817 | base = base->tp_base; |
| 818 | assert(base); |
| 819 | } |
| 820 | |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 821 | /* There's no need to clear the instance dict (if any); |
| 822 | the collector will call its tp_clear handler. */ |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 823 | |
| 824 | if (baseclear) |
| 825 | return baseclear(self); |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 826 | return 0; |
| 827 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 828 | |
| 829 | static void |
| 830 | subtype_dealloc(PyObject *self) |
| 831 | { |
Guido van Rossum | 14227b4 | 2001-12-06 02:35:58 +0000 | [diff] [blame] | 832 | PyTypeObject *type, *base; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 833 | destructor basedealloc; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 834 | |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 835 | /* Extract the type; we expect it to be a heap type */ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 836 | type = Py_TYPE(self); |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 837 | assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 838 | |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 839 | /* Test whether the type has GC exactly once */ |
| 840 | |
| 841 | if (!PyType_IS_GC(type)) { |
| 842 | /* It's really rare to find a dynamic type that doesn't have |
| 843 | GC; it can only happen when deriving from 'object' and not |
| 844 | adding any slots or instance variables. This allows |
| 845 | certain simplifications: there's no need to call |
| 846 | clear_slots(), or DECREF the dict, or clear weakrefs. */ |
| 847 | |
| 848 | /* Maybe call finalizer; exit early if resurrected */ |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 849 | if (type->tp_del) { |
| 850 | type->tp_del(self); |
| 851 | if (self->ob_refcnt > 0) |
| 852 | return; |
| 853 | } |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 854 | |
| 855 | /* Find the nearest base with a different tp_dealloc */ |
| 856 | base = type; |
| 857 | while ((basedealloc = base->tp_dealloc) == subtype_dealloc) { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 858 | assert(Py_SIZE(base) == 0); |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 859 | base = base->tp_base; |
| 860 | assert(base); |
| 861 | } |
| 862 | |
Benjamin Peterson | 193152c | 2009-04-25 01:08:45 +0000 | [diff] [blame] | 863 | /* Extract the type again; tp_del may have changed it */ |
| 864 | type = Py_TYPE(self); |
| 865 | |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 866 | /* Call the base tp_dealloc() */ |
| 867 | assert(basedealloc); |
| 868 | basedealloc(self); |
| 869 | |
| 870 | /* Can't reference self beyond this point */ |
| 871 | Py_DECREF(type); |
| 872 | |
| 873 | /* Done */ |
| 874 | return; |
| 875 | } |
| 876 | |
| 877 | /* We get here only if the type has GC */ |
| 878 | |
| 879 | /* UnTrack and re-Track around the trashcan macro, alas */ |
Andrew M. Kuchling | c9172d3 | 2003-02-06 15:22:49 +0000 | [diff] [blame] | 880 | /* See explanation at end of function for full disclosure */ |
Guido van Rossum | 0906e07 | 2002-08-07 20:42:09 +0000 | [diff] [blame] | 881 | PyObject_GC_UnTrack(self); |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 882 | ++_PyTrash_delete_nesting; |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 883 | Py_TRASHCAN_SAFE_BEGIN(self); |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 884 | --_PyTrash_delete_nesting; |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 885 | /* DO NOT restore GC tracking at this point. weakref callbacks |
| 886 | * (if any, and whether directly here or indirectly in something we |
| 887 | * call) may trigger GC, and if self is tracked at that point, it |
| 888 | * will look like trash to GC and GC will try to delete self again. |
Tim Peters | add09b4 | 2003-11-12 20:43:28 +0000 | [diff] [blame] | 889 | */ |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 890 | |
Guido van Rossum | 59195fd | 2003-06-13 20:54:40 +0000 | [diff] [blame] | 891 | /* Find the nearest base with a different tp_dealloc */ |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 892 | base = type; |
| 893 | while ((basedealloc = base->tp_dealloc) == subtype_dealloc) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 894 | base = base->tp_base; |
| 895 | assert(base); |
Guido van Rossum | 14227b4 | 2001-12-06 02:35:58 +0000 | [diff] [blame] | 896 | } |
| 897 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 898 | /* If we added a weaklist, we clear it. Do this *before* calling |
Guido van Rossum | 59195fd | 2003-06-13 20:54:40 +0000 | [diff] [blame] | 899 | the finalizer (__del__), clearing slots, or clearing the instance |
| 900 | dict. */ |
| 901 | |
Guido van Rossum | 1987c66 | 2003-05-29 14:29:23 +0000 | [diff] [blame] | 902 | if (type->tp_weaklistoffset && !base->tp_weaklistoffset) |
| 903 | PyObject_ClearWeakRefs(self); |
| 904 | |
| 905 | /* Maybe call finalizer; exit early if resurrected */ |
| 906 | if (type->tp_del) { |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 907 | _PyObject_GC_TRACK(self); |
Guido van Rossum | 1987c66 | 2003-05-29 14:29:23 +0000 | [diff] [blame] | 908 | type->tp_del(self); |
| 909 | if (self->ob_refcnt > 0) |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 910 | goto endlabel; /* resurrected */ |
| 911 | else |
| 912 | _PyObject_GC_UNTRACK(self); |
Thomas Wouters | b213704 | 2007-02-01 18:02:27 +0000 | [diff] [blame] | 913 | /* New weakrefs could be created during the finalizer call. |
| 914 | If this occurs, clear them out without calling their |
| 915 | finalizers since they might rely on part of the object |
| 916 | being finalized that has already been destroyed. */ |
| 917 | if (type->tp_weaklistoffset && !base->tp_weaklistoffset) { |
| 918 | /* Modeled after GET_WEAKREFS_LISTPTR() */ |
| 919 | PyWeakReference **list = (PyWeakReference **) \ |
| 920 | PyObject_GET_WEAKREFS_LISTPTR(self); |
| 921 | while (*list) |
| 922 | _PyWeakref_ClearRef(*list); |
| 923 | } |
Guido van Rossum | 1987c66 | 2003-05-29 14:29:23 +0000 | [diff] [blame] | 924 | } |
| 925 | |
Guido van Rossum | 59195fd | 2003-06-13 20:54:40 +0000 | [diff] [blame] | 926 | /* Clear slots up to the nearest base with a different tp_dealloc */ |
| 927 | base = type; |
| 928 | while ((basedealloc = base->tp_dealloc) == subtype_dealloc) { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 929 | if (Py_SIZE(base)) |
Guido van Rossum | 59195fd | 2003-06-13 20:54:40 +0000 | [diff] [blame] | 930 | clear_slots(base, self); |
| 931 | base = base->tp_base; |
| 932 | assert(base); |
| 933 | } |
| 934 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 935 | /* If we added a dict, DECREF it */ |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 936 | if (type->tp_dictoffset && !base->tp_dictoffset) { |
| 937 | PyObject **dictptr = _PyObject_GetDictPtr(self); |
| 938 | if (dictptr != NULL) { |
| 939 | PyObject *dict = *dictptr; |
| 940 | if (dict != NULL) { |
| 941 | Py_DECREF(dict); |
| 942 | *dictptr = NULL; |
| 943 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 944 | } |
| 945 | } |
| 946 | |
Benjamin Peterson | 193152c | 2009-04-25 01:08:45 +0000 | [diff] [blame] | 947 | /* Extract the type again; tp_del may have changed it */ |
| 948 | type = Py_TYPE(self); |
| 949 | |
Tim Peters | 0bd743c | 2003-11-13 22:50:00 +0000 | [diff] [blame] | 950 | /* Call the base tp_dealloc(); first retrack self if |
| 951 | * basedealloc knows about gc. |
| 952 | */ |
| 953 | if (PyType_IS_GC(base)) |
| 954 | _PyObject_GC_TRACK(self); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 955 | assert(basedealloc); |
| 956 | basedealloc(self); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 957 | |
| 958 | /* Can't reference self beyond this point */ |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 959 | Py_DECREF(type); |
| 960 | |
Guido van Rossum | 0906e07 | 2002-08-07 20:42:09 +0000 | [diff] [blame] | 961 | endlabel: |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 962 | ++_PyTrash_delete_nesting; |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 963 | Py_TRASHCAN_SAFE_END(self); |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 964 | --_PyTrash_delete_nesting; |
| 965 | |
| 966 | /* Explanation of the weirdness around the trashcan macros: |
| 967 | |
| 968 | Q. What do the trashcan macros do? |
| 969 | |
| 970 | A. Read the comment titled "Trashcan mechanism" in object.h. |
| 971 | For one, this explains why there must be a call to GC-untrack |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 972 | before the trashcan begin macro. Without understanding the |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 973 | trashcan code, the answers to the following questions don't make |
| 974 | sense. |
| 975 | |
| 976 | Q. Why do we GC-untrack before the trashcan and then immediately |
| 977 | GC-track again afterward? |
| 978 | |
| 979 | A. In the case that the base class is GC-aware, the base class |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 980 | probably GC-untracks the object. If it does that using the |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 981 | UNTRACK macro, this will crash when the object is already |
| 982 | untracked. Because we don't know what the base class does, the |
| 983 | only safe thing is to make sure the object is tracked when we |
| 984 | call the base class dealloc. But... The trashcan begin macro |
| 985 | requires that the object is *untracked* before it is called. So |
| 986 | the dance becomes: |
| 987 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 988 | GC untrack |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 989 | trashcan begin |
| 990 | GC track |
| 991 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 992 | Q. Why did the last question say "immediately GC-track again"? |
| 993 | It's nowhere near immediately. |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 994 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 995 | A. Because the code *used* to re-track immediately. Bad Idea. |
| 996 | self has a refcount of 0, and if gc ever gets its hands on it |
| 997 | (which can happen if any weakref callback gets invoked), it |
| 998 | looks like trash to gc too, and gc also tries to delete self |
| 999 | then. But we're already deleting self. Double dealloction is |
| 1000 | a subtle disaster. |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 1001 | |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 1002 | Q. Why the bizarre (net-zero) manipulation of |
| 1003 | _PyTrash_delete_nesting around the trashcan macros? |
| 1004 | |
| 1005 | A. Some base classes (e.g. list) also use the trashcan mechanism. |
| 1006 | The following scenario used to be possible: |
| 1007 | |
| 1008 | - suppose the trashcan level is one below the trashcan limit |
| 1009 | |
| 1010 | - subtype_dealloc() is called |
| 1011 | |
| 1012 | - the trashcan limit is not yet reached, so the trashcan level |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1013 | is incremented and the code between trashcan begin and end is |
| 1014 | executed |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 1015 | |
| 1016 | - this destroys much of the object's contents, including its |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1017 | slots and __dict__ |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 1018 | |
| 1019 | - basedealloc() is called; this is really list_dealloc(), or |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1020 | some other type which also uses the trashcan macros |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 1021 | |
| 1022 | - the trashcan limit is now reached, so the object is put on the |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1023 | trashcan's to-be-deleted-later list |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 1024 | |
| 1025 | - basedealloc() returns |
| 1026 | |
| 1027 | - subtype_dealloc() decrefs the object's type |
| 1028 | |
| 1029 | - subtype_dealloc() returns |
| 1030 | |
| 1031 | - later, the trashcan code starts deleting the objects from its |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1032 | to-be-deleted-later list |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 1033 | |
| 1034 | - subtype_dealloc() is called *AGAIN* for the same object |
| 1035 | |
| 1036 | - at the very least (if the destroyed slots and __dict__ don't |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1037 | cause problems) the object's type gets decref'ed a second |
| 1038 | time, which is *BAD*!!! |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 1039 | |
| 1040 | The remedy is to make sure that if the code between trashcan |
| 1041 | begin and end in subtype_dealloc() is called, the code between |
| 1042 | trashcan begin and end in basedealloc() will also be called. |
| 1043 | This is done by decrementing the level after passing into the |
| 1044 | trashcan block, and incrementing it just before leaving the |
| 1045 | block. |
| 1046 | |
| 1047 | But now it's possible that a chain of objects consisting solely |
| 1048 | of objects whose deallocator is subtype_dealloc() will defeat |
| 1049 | the trashcan mechanism completely: the decremented level means |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1050 | that the effective level never reaches the limit. Therefore, we |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 1051 | *increment* the level *before* entering the trashcan block, and |
| 1052 | matchingly decrement it after leaving. This means the trashcan |
| 1053 | code will trigger a little early, but that's no big deal. |
| 1054 | |
| 1055 | Q. Are there any live examples of code in need of all this |
| 1056 | complexity? |
| 1057 | |
| 1058 | A. Yes. See SF bug 668433 for code that crashed (when Python was |
| 1059 | compiled in debug mode) before the trashcan level manipulations |
| 1060 | were added. For more discussion, see SF patches 581742, 575073 |
| 1061 | and bug 574207. |
| 1062 | */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1063 | } |
| 1064 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 1065 | static PyTypeObject *solid_base(PyTypeObject *type); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1066 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1067 | /* type test with subclassing support */ |
| 1068 | |
| 1069 | int |
| 1070 | PyType_IsSubtype(PyTypeObject *a, PyTypeObject *b) |
| 1071 | { |
| 1072 | PyObject *mro; |
| 1073 | |
| 1074 | mro = a->tp_mro; |
| 1075 | if (mro != NULL) { |
| 1076 | /* Deal with multiple inheritance without recursion |
| 1077 | by walking the MRO tuple */ |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1078 | Py_ssize_t i, n; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1079 | assert(PyTuple_Check(mro)); |
| 1080 | n = PyTuple_GET_SIZE(mro); |
| 1081 | for (i = 0; i < n; i++) { |
| 1082 | if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b) |
| 1083 | return 1; |
| 1084 | } |
| 1085 | return 0; |
| 1086 | } |
| 1087 | else { |
| 1088 | /* a is not completely initilized yet; follow tp_base */ |
| 1089 | do { |
| 1090 | if (a == b) |
| 1091 | return 1; |
| 1092 | a = a->tp_base; |
| 1093 | } while (a != NULL); |
| 1094 | return b == &PyBaseObject_Type; |
| 1095 | } |
| 1096 | } |
| 1097 | |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1098 | /* Internal routines to do a method lookup in the type |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1099 | without looking in the instance dictionary |
| 1100 | (so we can't use PyObject_GetAttr) but still binding |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1101 | it to the instance. The arguments are the object, |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1102 | the method name as a C string, and the address of a |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1103 | static variable used to cache the interned Python string. |
| 1104 | |
| 1105 | Two variants: |
| 1106 | |
| 1107 | - lookup_maybe() returns NULL without raising an exception |
| 1108 | when the _PyType_Lookup() call fails; |
| 1109 | |
| 1110 | - lookup_method() always raises an exception upon errors. |
Benjamin Peterson | 224205f | 2009-05-08 03:25:19 +0000 | [diff] [blame] | 1111 | |
| 1112 | - _PyObject_LookupSpecial() exported for the benefit of other places. |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1113 | */ |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1114 | |
| 1115 | static PyObject * |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1116 | lookup_maybe(PyObject *self, char *attrstr, PyObject **attrobj) |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1117 | { |
| 1118 | PyObject *res; |
| 1119 | |
| 1120 | if (*attrobj == NULL) { |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 1121 | *attrobj = PyUnicode_InternFromString(attrstr); |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1122 | if (*attrobj == NULL) |
| 1123 | return NULL; |
| 1124 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1125 | res = _PyType_Lookup(Py_TYPE(self), *attrobj); |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1126 | if (res != NULL) { |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1127 | descrgetfunc f; |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1128 | if ((f = Py_TYPE(res)->tp_descr_get) == NULL) |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1129 | Py_INCREF(res); |
| 1130 | else |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1131 | res = f(res, self, (PyObject *)(Py_TYPE(self))); |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1132 | } |
| 1133 | return res; |
| 1134 | } |
| 1135 | |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1136 | static PyObject * |
| 1137 | lookup_method(PyObject *self, char *attrstr, PyObject **attrobj) |
| 1138 | { |
| 1139 | PyObject *res = lookup_maybe(self, attrstr, attrobj); |
| 1140 | if (res == NULL && !PyErr_Occurred()) |
| 1141 | PyErr_SetObject(PyExc_AttributeError, *attrobj); |
| 1142 | return res; |
| 1143 | } |
| 1144 | |
Benjamin Peterson | 224205f | 2009-05-08 03:25:19 +0000 | [diff] [blame] | 1145 | PyObject * |
| 1146 | _PyObject_LookupSpecial(PyObject *self, char *attrstr, PyObject **attrobj) |
| 1147 | { |
| 1148 | return lookup_maybe(self, attrstr, attrobj); |
| 1149 | } |
| 1150 | |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1151 | /* A variation of PyObject_CallMethod that uses lookup_method() |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1152 | instead of PyObject_GetAttrString(). This uses the same convention |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1153 | as lookup_method to cache the interned name string object. */ |
| 1154 | |
Neil Schemenauer | f23473f | 2001-10-21 22:28:58 +0000 | [diff] [blame] | 1155 | static PyObject * |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1156 | call_method(PyObject *o, char *name, PyObject **nameobj, char *format, ...) |
| 1157 | { |
| 1158 | va_list va; |
| 1159 | PyObject *args, *func = 0, *retval; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1160 | va_start(va, format); |
| 1161 | |
Guido van Rossum | da21c01 | 2001-10-03 00:50:18 +0000 | [diff] [blame] | 1162 | func = lookup_maybe(o, name, nameobj); |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1163 | if (func == NULL) { |
| 1164 | va_end(va); |
| 1165 | if (!PyErr_Occurred()) |
Guido van Rossum | da21c01 | 2001-10-03 00:50:18 +0000 | [diff] [blame] | 1166 | PyErr_SetObject(PyExc_AttributeError, *nameobj); |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1167 | return NULL; |
| 1168 | } |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1169 | |
| 1170 | if (format && *format) |
| 1171 | args = Py_VaBuildValue(format, va); |
| 1172 | else |
| 1173 | args = PyTuple_New(0); |
| 1174 | |
| 1175 | va_end(va); |
| 1176 | |
| 1177 | if (args == NULL) |
| 1178 | return NULL; |
| 1179 | |
| 1180 | assert(PyTuple_Check(args)); |
| 1181 | retval = PyObject_Call(func, args, NULL); |
| 1182 | |
| 1183 | Py_DECREF(args); |
| 1184 | Py_DECREF(func); |
| 1185 | |
| 1186 | return retval; |
| 1187 | } |
| 1188 | |
| 1189 | /* Clone of call_method() that returns NotImplemented when the lookup fails. */ |
| 1190 | |
Neil Schemenauer | f23473f | 2001-10-21 22:28:58 +0000 | [diff] [blame] | 1191 | static PyObject * |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1192 | call_maybe(PyObject *o, char *name, PyObject **nameobj, char *format, ...) |
| 1193 | { |
| 1194 | va_list va; |
| 1195 | PyObject *args, *func = 0, *retval; |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1196 | va_start(va, format); |
| 1197 | |
Guido van Rossum | da21c01 | 2001-10-03 00:50:18 +0000 | [diff] [blame] | 1198 | func = lookup_maybe(o, name, nameobj); |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1199 | if (func == NULL) { |
| 1200 | va_end(va); |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1201 | if (!PyErr_Occurred()) { |
| 1202 | Py_INCREF(Py_NotImplemented); |
| 1203 | return Py_NotImplemented; |
| 1204 | } |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 1205 | return NULL; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1206 | } |
| 1207 | |
| 1208 | if (format && *format) |
| 1209 | args = Py_VaBuildValue(format, va); |
| 1210 | else |
| 1211 | args = PyTuple_New(0); |
| 1212 | |
| 1213 | va_end(va); |
| 1214 | |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 1215 | if (args == NULL) |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1216 | return NULL; |
| 1217 | |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 1218 | assert(PyTuple_Check(args)); |
| 1219 | retval = PyObject_Call(func, args, NULL); |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1220 | |
| 1221 | Py_DECREF(args); |
| 1222 | Py_DECREF(func); |
| 1223 | |
| 1224 | return retval; |
| 1225 | } |
| 1226 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1227 | /* |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1228 | Method resolution order algorithm C3 described in |
| 1229 | "A Monotonic Superclass Linearization for Dylan", |
| 1230 | by Kim Barrett, Bob Cassel, Paul Haahr, |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1231 | David A. Moon, Keith Playford, and P. Tucker Withington. |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1232 | (OOPSLA 1996) |
| 1233 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1234 | Some notes about the rules implied by C3: |
| 1235 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1236 | No duplicate bases. |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1237 | It isn't legal to repeat a class in a list of base classes. |
| 1238 | |
| 1239 | The next three properties are the 3 constraints in "C3". |
| 1240 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1241 | Local precendece order. |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1242 | If A precedes B in C's MRO, then A will precede B in the MRO of all |
| 1243 | subclasses of C. |
| 1244 | |
| 1245 | Monotonicity. |
| 1246 | The MRO of a class must be an extension without reordering of the |
| 1247 | MRO of each of its superclasses. |
| 1248 | |
| 1249 | Extended Precedence Graph (EPG). |
| 1250 | Linearization is consistent if there is a path in the EPG from |
| 1251 | each class to all its successors in the linearization. See |
| 1252 | the paper for definition of EPG. |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1253 | */ |
| 1254 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1255 | static int |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1256 | tail_contains(PyObject *list, int whence, PyObject *o) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1257 | Py_ssize_t j, size; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1258 | size = PyList_GET_SIZE(list); |
| 1259 | |
| 1260 | for (j = whence+1; j < size; j++) { |
| 1261 | if (PyList_GET_ITEM(list, j) == o) |
| 1262 | return 1; |
| 1263 | } |
| 1264 | return 0; |
| 1265 | } |
| 1266 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1267 | static PyObject * |
| 1268 | class_name(PyObject *cls) |
| 1269 | { |
| 1270 | PyObject *name = PyObject_GetAttrString(cls, "__name__"); |
| 1271 | if (name == NULL) { |
| 1272 | PyErr_Clear(); |
| 1273 | Py_XDECREF(name); |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 1274 | name = PyObject_Repr(cls); |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1275 | } |
| 1276 | if (name == NULL) |
| 1277 | return NULL; |
Martin v. Löwis | 9b9905b | 2007-06-10 21:13:34 +0000 | [diff] [blame] | 1278 | if (!PyUnicode_Check(name)) { |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1279 | Py_DECREF(name); |
| 1280 | return NULL; |
| 1281 | } |
| 1282 | return name; |
| 1283 | } |
| 1284 | |
| 1285 | static int |
| 1286 | check_duplicates(PyObject *list) |
| 1287 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1288 | Py_ssize_t i, j, n; |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1289 | /* Let's use a quadratic time algorithm, |
| 1290 | assuming that the bases lists is short. |
| 1291 | */ |
| 1292 | n = PyList_GET_SIZE(list); |
| 1293 | for (i = 0; i < n; i++) { |
| 1294 | PyObject *o = PyList_GET_ITEM(list, i); |
| 1295 | for (j = i + 1; j < n; j++) { |
| 1296 | if (PyList_GET_ITEM(list, j) == o) { |
| 1297 | o = class_name(o); |
| 1298 | PyErr_Format(PyExc_TypeError, |
Alexandre Vassalotti | a85998a | 2008-05-03 18:24:43 +0000 | [diff] [blame] | 1299 | "duplicate base class %.400s", |
Marc-André Lemburg | 4cc0f24 | 2008-08-07 18:54:33 +0000 | [diff] [blame] | 1300 | o ? _PyUnicode_AsString(o) : "?"); |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1301 | Py_XDECREF(o); |
| 1302 | return -1; |
| 1303 | } |
| 1304 | } |
| 1305 | } |
| 1306 | return 0; |
| 1307 | } |
| 1308 | |
| 1309 | /* Raise a TypeError for an MRO order disagreement. |
| 1310 | |
| 1311 | It's hard to produce a good error message. In the absence of better |
| 1312 | insight into error reporting, report the classes that were candidates |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1313 | to be put next into the MRO. There is some conflict between the |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1314 | order in which they should be put in the MRO, but it's hard to |
| 1315 | diagnose what constraint can't be satisfied. |
| 1316 | */ |
| 1317 | |
| 1318 | static void |
| 1319 | set_mro_error(PyObject *to_merge, int *remain) |
| 1320 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1321 | Py_ssize_t i, n, off, to_merge_size; |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1322 | char buf[1000]; |
| 1323 | PyObject *k, *v; |
| 1324 | PyObject *set = PyDict_New(); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1325 | if (!set) return; |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1326 | |
| 1327 | to_merge_size = PyList_GET_SIZE(to_merge); |
| 1328 | for (i = 0; i < to_merge_size; i++) { |
| 1329 | PyObject *L = PyList_GET_ITEM(to_merge, i); |
| 1330 | if (remain[i] < PyList_GET_SIZE(L)) { |
| 1331 | PyObject *c = PyList_GET_ITEM(L, remain[i]); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1332 | if (PyDict_SetItem(set, c, Py_None) < 0) { |
| 1333 | Py_DECREF(set); |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1334 | return; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1335 | } |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1336 | } |
| 1337 | } |
| 1338 | n = PyDict_Size(set); |
| 1339 | |
Raymond Hettinger | f394df4 | 2003-04-06 19:13:41 +0000 | [diff] [blame] | 1340 | off = PyOS_snprintf(buf, sizeof(buf), "Cannot create a \ |
| 1341 | consistent method resolution\norder (MRO) for bases"); |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1342 | i = 0; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1343 | while (PyDict_Next(set, &i, &k, &v) && (size_t)off < sizeof(buf)) { |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1344 | PyObject *name = class_name(k); |
| 1345 | off += PyOS_snprintf(buf + off, sizeof(buf) - off, " %s", |
Marc-André Lemburg | 4cc0f24 | 2008-08-07 18:54:33 +0000 | [diff] [blame] | 1346 | name ? _PyUnicode_AsString(name) : "?"); |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1347 | Py_XDECREF(name); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1348 | if (--n && (size_t)(off+1) < sizeof(buf)) { |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1349 | buf[off++] = ','; |
| 1350 | buf[off] = '\0'; |
| 1351 | } |
| 1352 | } |
| 1353 | PyErr_SetString(PyExc_TypeError, buf); |
| 1354 | Py_DECREF(set); |
| 1355 | } |
| 1356 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1357 | static int |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1358 | pmerge(PyObject *acc, PyObject* to_merge) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1359 | Py_ssize_t i, j, to_merge_size, empty_cnt; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1360 | int *remain; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1361 | int ok; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1362 | |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1363 | to_merge_size = PyList_GET_SIZE(to_merge); |
| 1364 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1365 | /* remain stores an index into each sublist of to_merge. |
| 1366 | remain[i] is the index of the next base in to_merge[i] |
| 1367 | that is not included in acc. |
| 1368 | */ |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1369 | remain = (int *)PyMem_MALLOC(SIZEOF_INT*to_merge_size); |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1370 | if (remain == NULL) |
| 1371 | return -1; |
| 1372 | for (i = 0; i < to_merge_size; i++) |
| 1373 | remain[i] = 0; |
| 1374 | |
| 1375 | again: |
| 1376 | empty_cnt = 0; |
| 1377 | for (i = 0; i < to_merge_size; i++) { |
| 1378 | PyObject *candidate; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1379 | |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1380 | PyObject *cur_list = PyList_GET_ITEM(to_merge, i); |
| 1381 | |
| 1382 | if (remain[i] >= PyList_GET_SIZE(cur_list)) { |
| 1383 | empty_cnt++; |
| 1384 | continue; |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1385 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1386 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1387 | /* Choose next candidate for MRO. |
| 1388 | |
| 1389 | The input sequences alone can determine the choice. |
| 1390 | If not, choose the class which appears in the MRO |
| 1391 | of the earliest direct superclass of the new class. |
| 1392 | */ |
| 1393 | |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1394 | candidate = PyList_GET_ITEM(cur_list, remain[i]); |
| 1395 | for (j = 0; j < to_merge_size; j++) { |
| 1396 | PyObject *j_lst = PyList_GET_ITEM(to_merge, j); |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1397 | if (tail_contains(j_lst, remain[j], candidate)) { |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1398 | goto skip; /* continue outer loop */ |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1399 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1400 | } |
| 1401 | ok = PyList_Append(acc, candidate); |
| 1402 | if (ok < 0) { |
| 1403 | PyMem_Free(remain); |
| 1404 | return -1; |
| 1405 | } |
| 1406 | for (j = 0; j < to_merge_size; j++) { |
| 1407 | PyObject *j_lst = PyList_GET_ITEM(to_merge, j); |
Guido van Rossum | 768158c | 2002-12-31 16:33:01 +0000 | [diff] [blame] | 1408 | if (remain[j] < PyList_GET_SIZE(j_lst) && |
| 1409 | PyList_GET_ITEM(j_lst, remain[j]) == candidate) { |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1410 | remain[j]++; |
| 1411 | } |
| 1412 | } |
| 1413 | goto again; |
Tim Peters | 9a6b8d8 | 2002-11-14 23:22:33 +0000 | [diff] [blame] | 1414 | skip: ; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1415 | } |
| 1416 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1417 | if (empty_cnt == to_merge_size) { |
| 1418 | PyMem_FREE(remain); |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1419 | return 0; |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1420 | } |
| 1421 | set_mro_error(to_merge, remain); |
| 1422 | PyMem_FREE(remain); |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1423 | return -1; |
| 1424 | } |
| 1425 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1426 | static PyObject * |
| 1427 | mro_implementation(PyTypeObject *type) |
| 1428 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1429 | Py_ssize_t i, n; |
| 1430 | int ok; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1431 | PyObject *bases, *result; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1432 | PyObject *to_merge, *bases_aslist; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1433 | |
Christian Heimes | 412dc9c | 2008-01-27 18:55:54 +0000 | [diff] [blame] | 1434 | if (type->tp_dict == NULL) { |
| 1435 | if (PyType_Ready(type) < 0) |
Guido van Rossum | 6351757 | 2002-06-18 16:44:57 +0000 | [diff] [blame] | 1436 | return NULL; |
| 1437 | } |
| 1438 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1439 | /* Find a superclass linearization that honors the constraints |
| 1440 | of the explicit lists of bases and the constraints implied by |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1441 | each base class. |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1442 | |
| 1443 | to_merge is a list of lists, where each list is a superclass |
| 1444 | linearization implied by a base class. The last element of |
| 1445 | to_merge is the declared list of bases. |
| 1446 | */ |
| 1447 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1448 | bases = type->tp_bases; |
| 1449 | n = PyTuple_GET_SIZE(bases); |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1450 | |
| 1451 | to_merge = PyList_New(n+1); |
| 1452 | if (to_merge == NULL) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1453 | return NULL; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1454 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1455 | for (i = 0; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1456 | PyObject *base = PyTuple_GET_ITEM(bases, i); |
| 1457 | PyObject *parentMRO; |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 1458 | parentMRO = PySequence_List(((PyTypeObject*)base)->tp_mro); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1459 | if (parentMRO == NULL) { |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1460 | Py_DECREF(to_merge); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1461 | return NULL; |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1462 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1463 | |
| 1464 | PyList_SET_ITEM(to_merge, i, parentMRO); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1465 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1466 | |
| 1467 | bases_aslist = PySequence_List(bases); |
| 1468 | if (bases_aslist == NULL) { |
| 1469 | Py_DECREF(to_merge); |
| 1470 | return NULL; |
| 1471 | } |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1472 | /* This is just a basic sanity check. */ |
| 1473 | if (check_duplicates(bases_aslist) < 0) { |
| 1474 | Py_DECREF(to_merge); |
| 1475 | Py_DECREF(bases_aslist); |
| 1476 | return NULL; |
| 1477 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1478 | PyList_SET_ITEM(to_merge, n, bases_aslist); |
| 1479 | |
| 1480 | result = Py_BuildValue("[O]", (PyObject *)type); |
| 1481 | if (result == NULL) { |
| 1482 | Py_DECREF(to_merge); |
| 1483 | return NULL; |
| 1484 | } |
| 1485 | |
| 1486 | ok = pmerge(result, to_merge); |
| 1487 | Py_DECREF(to_merge); |
| 1488 | if (ok < 0) { |
| 1489 | Py_DECREF(result); |
| 1490 | return NULL; |
| 1491 | } |
| 1492 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1493 | return result; |
| 1494 | } |
| 1495 | |
| 1496 | static PyObject * |
Martin v. Löwis | e3eb1f2 | 2001-08-16 13:15:00 +0000 | [diff] [blame] | 1497 | mro_external(PyObject *self) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1498 | { |
| 1499 | PyTypeObject *type = (PyTypeObject *)self; |
| 1500 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1501 | return mro_implementation(type); |
| 1502 | } |
| 1503 | |
| 1504 | static int |
| 1505 | mro_internal(PyTypeObject *type) |
| 1506 | { |
| 1507 | PyObject *mro, *result, *tuple; |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1508 | int checkit = 0; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1509 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1510 | if (Py_TYPE(type) == &PyType_Type) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1511 | result = mro_implementation(type); |
| 1512 | } |
| 1513 | else { |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1514 | static PyObject *mro_str; |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1515 | checkit = 1; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1516 | mro = lookup_method((PyObject *)type, "mro", &mro_str); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1517 | if (mro == NULL) |
| 1518 | return -1; |
| 1519 | result = PyObject_CallObject(mro, NULL); |
| 1520 | Py_DECREF(mro); |
| 1521 | } |
| 1522 | if (result == NULL) |
| 1523 | return -1; |
| 1524 | tuple = PySequence_Tuple(result); |
| 1525 | Py_DECREF(result); |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1526 | if (tuple == NULL) |
| 1527 | return -1; |
| 1528 | if (checkit) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1529 | Py_ssize_t i, len; |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1530 | PyObject *cls; |
| 1531 | PyTypeObject *solid; |
| 1532 | |
| 1533 | solid = solid_base(type); |
| 1534 | |
| 1535 | len = PyTuple_GET_SIZE(tuple); |
| 1536 | |
| 1537 | for (i = 0; i < len; i++) { |
| 1538 | PyTypeObject *t; |
| 1539 | cls = PyTuple_GET_ITEM(tuple, i); |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 1540 | if (!PyType_Check(cls)) { |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1541 | PyErr_Format(PyExc_TypeError, |
| 1542 | "mro() returned a non-class ('%.500s')", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1543 | Py_TYPE(cls)->tp_name); |
Neal Norwitz | 50bf51a | 2006-01-02 02:46:54 +0000 | [diff] [blame] | 1544 | Py_DECREF(tuple); |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1545 | return -1; |
| 1546 | } |
| 1547 | t = (PyTypeObject*)cls; |
| 1548 | if (!PyType_IsSubtype(solid, solid_base(t))) { |
| 1549 | PyErr_Format(PyExc_TypeError, |
| 1550 | "mro() returned base with unsuitable layout ('%.500s')", |
| 1551 | t->tp_name); |
Neal Norwitz | 50bf51a | 2006-01-02 02:46:54 +0000 | [diff] [blame] | 1552 | Py_DECREF(tuple); |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1553 | return -1; |
| 1554 | } |
| 1555 | } |
| 1556 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1557 | type->tp_mro = tuple; |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 1558 | |
| 1559 | type_mro_modified(type, type->tp_mro); |
| 1560 | /* corner case: the old-style super class might have been hidden |
| 1561 | from the custom MRO */ |
| 1562 | type_mro_modified(type, type->tp_bases); |
| 1563 | |
Georg Brandl | f08a9dd | 2008-06-10 16:57:31 +0000 | [diff] [blame] | 1564 | PyType_Modified(type); |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 1565 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1566 | return 0; |
| 1567 | } |
| 1568 | |
| 1569 | |
| 1570 | /* Calculate the best base amongst multiple base classes. |
| 1571 | This is the first one that's on the path to the "solid base". */ |
| 1572 | |
| 1573 | static PyTypeObject * |
| 1574 | best_base(PyObject *bases) |
| 1575 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1576 | Py_ssize_t i, n; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1577 | PyTypeObject *base, *winner, *candidate, *base_i; |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1578 | PyObject *base_proto; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1579 | |
| 1580 | assert(PyTuple_Check(bases)); |
| 1581 | n = PyTuple_GET_SIZE(bases); |
| 1582 | assert(n > 0); |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1583 | base = NULL; |
| 1584 | winner = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1585 | for (i = 0; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1586 | base_proto = PyTuple_GET_ITEM(bases, i); |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1587 | if (!PyType_Check(base_proto)) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1588 | PyErr_SetString( |
| 1589 | PyExc_TypeError, |
| 1590 | "bases must be types"); |
| 1591 | return NULL; |
| 1592 | } |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1593 | base_i = (PyTypeObject *)base_proto; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1594 | if (base_i->tp_dict == NULL) { |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 1595 | if (PyType_Ready(base_i) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1596 | return NULL; |
| 1597 | } |
| 1598 | candidate = solid_base(base_i); |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1599 | if (winner == NULL) { |
| 1600 | winner = candidate; |
| 1601 | base = base_i; |
| 1602 | } |
| 1603 | else if (PyType_IsSubtype(winner, candidate)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1604 | ; |
| 1605 | else if (PyType_IsSubtype(candidate, winner)) { |
| 1606 | winner = candidate; |
| 1607 | base = base_i; |
| 1608 | } |
| 1609 | else { |
| 1610 | PyErr_SetString( |
| 1611 | PyExc_TypeError, |
| 1612 | "multiple bases have " |
| 1613 | "instance lay-out conflict"); |
| 1614 | return NULL; |
| 1615 | } |
| 1616 | } |
Guido van Rossum | e54616c | 2001-12-14 04:19:56 +0000 | [diff] [blame] | 1617 | if (base == NULL) |
| 1618 | PyErr_SetString(PyExc_TypeError, |
| 1619 | "a new-style class can't have only classic bases"); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1620 | return base; |
| 1621 | } |
| 1622 | |
| 1623 | static int |
| 1624 | extra_ivars(PyTypeObject *type, PyTypeObject *base) |
| 1625 | { |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 1626 | size_t t_size = type->tp_basicsize; |
| 1627 | size_t b_size = base->tp_basicsize; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1628 | |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1629 | assert(t_size >= b_size); /* Else type smaller than base! */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1630 | if (type->tp_itemsize || base->tp_itemsize) { |
| 1631 | /* If itemsize is involved, stricter rules */ |
| 1632 | return t_size != b_size || |
| 1633 | type->tp_itemsize != base->tp_itemsize; |
| 1634 | } |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1635 | if (type->tp_weaklistoffset && base->tp_weaklistoffset == 0 && |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1636 | type->tp_weaklistoffset + sizeof(PyObject *) == t_size && |
| 1637 | type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1638 | t_size -= sizeof(PyObject *); |
| 1639 | if (type->tp_dictoffset && base->tp_dictoffset == 0 && |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1640 | type->tp_dictoffset + sizeof(PyObject *) == t_size && |
| 1641 | type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1642 | t_size -= sizeof(PyObject *); |
| 1643 | |
| 1644 | return t_size != b_size; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1645 | } |
| 1646 | |
| 1647 | static PyTypeObject * |
| 1648 | solid_base(PyTypeObject *type) |
| 1649 | { |
| 1650 | PyTypeObject *base; |
| 1651 | |
| 1652 | if (type->tp_base) |
| 1653 | base = solid_base(type->tp_base); |
| 1654 | else |
| 1655 | base = &PyBaseObject_Type; |
| 1656 | if (extra_ivars(type, base)) |
| 1657 | return type; |
| 1658 | else |
| 1659 | return base; |
| 1660 | } |
| 1661 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 1662 | static void object_dealloc(PyObject *); |
| 1663 | static int object_init(PyObject *, PyObject *, PyObject *); |
| 1664 | static int update_slot(PyTypeObject *, PyObject *); |
| 1665 | static void fixup_slot_dispatchers(PyTypeObject *); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1666 | |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1667 | /* |
| 1668 | * Helpers for __dict__ descriptor. We don't want to expose the dicts |
| 1669 | * inherited from various builtin types. The builtin base usually provides |
| 1670 | * its own __dict__ descriptor, so we use that when we can. |
| 1671 | */ |
| 1672 | static PyTypeObject * |
| 1673 | get_builtin_base_with_dict(PyTypeObject *type) |
| 1674 | { |
| 1675 | while (type->tp_base != NULL) { |
| 1676 | if (type->tp_dictoffset != 0 && |
| 1677 | !(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) |
| 1678 | return type; |
| 1679 | type = type->tp_base; |
| 1680 | } |
| 1681 | return NULL; |
| 1682 | } |
| 1683 | |
| 1684 | static PyObject * |
| 1685 | get_dict_descriptor(PyTypeObject *type) |
| 1686 | { |
| 1687 | static PyObject *dict_str; |
| 1688 | PyObject *descr; |
| 1689 | |
| 1690 | if (dict_str == NULL) { |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 1691 | dict_str = PyUnicode_InternFromString("__dict__"); |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1692 | if (dict_str == NULL) |
| 1693 | return NULL; |
| 1694 | } |
| 1695 | descr = _PyType_Lookup(type, dict_str); |
| 1696 | if (descr == NULL || !PyDescr_IsData(descr)) |
| 1697 | return NULL; |
| 1698 | |
| 1699 | return descr; |
| 1700 | } |
| 1701 | |
| 1702 | static void |
| 1703 | raise_dict_descr_error(PyObject *obj) |
| 1704 | { |
| 1705 | PyErr_Format(PyExc_TypeError, |
| 1706 | "this __dict__ descriptor does not support " |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1707 | "'%.200s' objects", Py_TYPE(obj)->tp_name); |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1708 | } |
| 1709 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1710 | static PyObject * |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1711 | subtype_dict(PyObject *obj, void *context) |
| 1712 | { |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1713 | PyObject **dictptr; |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1714 | PyObject *dict; |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1715 | PyTypeObject *base; |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1716 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1717 | base = get_builtin_base_with_dict(Py_TYPE(obj)); |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1718 | if (base != NULL) { |
| 1719 | descrgetfunc func; |
| 1720 | PyObject *descr = get_dict_descriptor(base); |
| 1721 | if (descr == NULL) { |
| 1722 | raise_dict_descr_error(obj); |
| 1723 | return NULL; |
| 1724 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1725 | func = Py_TYPE(descr)->tp_descr_get; |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1726 | if (func == NULL) { |
| 1727 | raise_dict_descr_error(obj); |
| 1728 | return NULL; |
| 1729 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1730 | return func(descr, obj, (PyObject *)(Py_TYPE(obj))); |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1731 | } |
| 1732 | |
| 1733 | dictptr = _PyObject_GetDictPtr(obj); |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1734 | if (dictptr == NULL) { |
| 1735 | PyErr_SetString(PyExc_AttributeError, |
| 1736 | "This object has no __dict__"); |
| 1737 | return NULL; |
| 1738 | } |
| 1739 | dict = *dictptr; |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 1740 | if (dict == NULL) |
| 1741 | *dictptr = dict = PyDict_New(); |
| 1742 | Py_XINCREF(dict); |
| 1743 | return dict; |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1744 | } |
| 1745 | |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1746 | static int |
| 1747 | subtype_setdict(PyObject *obj, PyObject *value, void *context) |
| 1748 | { |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1749 | PyObject **dictptr; |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1750 | PyObject *dict; |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1751 | PyTypeObject *base; |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1752 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1753 | base = get_builtin_base_with_dict(Py_TYPE(obj)); |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1754 | if (base != NULL) { |
| 1755 | descrsetfunc func; |
| 1756 | PyObject *descr = get_dict_descriptor(base); |
| 1757 | if (descr == NULL) { |
| 1758 | raise_dict_descr_error(obj); |
| 1759 | return -1; |
| 1760 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1761 | func = Py_TYPE(descr)->tp_descr_set; |
Guido van Rossum | 360e4b8 | 2007-05-14 22:51:27 +0000 | [diff] [blame] | 1762 | if (func == NULL) { |
| 1763 | raise_dict_descr_error(obj); |
| 1764 | return -1; |
| 1765 | } |
| 1766 | return func(descr, obj, value); |
| 1767 | } |
| 1768 | |
| 1769 | dictptr = _PyObject_GetDictPtr(obj); |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1770 | if (dictptr == NULL) { |
| 1771 | PyErr_SetString(PyExc_AttributeError, |
| 1772 | "This object has no __dict__"); |
| 1773 | return -1; |
| 1774 | } |
Guido van Rossum | d331cb5 | 2001-12-05 19:46:42 +0000 | [diff] [blame] | 1775 | if (value != NULL && !PyDict_Check(value)) { |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1776 | PyErr_Format(PyExc_TypeError, |
| 1777 | "__dict__ must be set to a dictionary, " |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1778 | "not a '%.200s'", Py_TYPE(value)->tp_name); |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1779 | return -1; |
| 1780 | } |
| 1781 | dict = *dictptr; |
Guido van Rossum | d331cb5 | 2001-12-05 19:46:42 +0000 | [diff] [blame] | 1782 | Py_XINCREF(value); |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1783 | *dictptr = value; |
| 1784 | Py_XDECREF(dict); |
| 1785 | return 0; |
| 1786 | } |
| 1787 | |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1788 | static PyObject * |
| 1789 | subtype_getweakref(PyObject *obj, void *context) |
| 1790 | { |
| 1791 | PyObject **weaklistptr; |
| 1792 | PyObject *result; |
| 1793 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1794 | if (Py_TYPE(obj)->tp_weaklistoffset == 0) { |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1795 | PyErr_SetString(PyExc_AttributeError, |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1796 | "This object has no __weakref__"); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1797 | return NULL; |
| 1798 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1799 | assert(Py_TYPE(obj)->tp_weaklistoffset > 0); |
| 1800 | assert(Py_TYPE(obj)->tp_weaklistoffset + sizeof(PyObject *) <= |
| 1801 | (size_t)(Py_TYPE(obj)->tp_basicsize)); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1802 | weaklistptr = (PyObject **) |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1803 | ((char *)obj + Py_TYPE(obj)->tp_weaklistoffset); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1804 | if (*weaklistptr == NULL) |
| 1805 | result = Py_None; |
| 1806 | else |
| 1807 | result = *weaklistptr; |
| 1808 | Py_INCREF(result); |
| 1809 | return result; |
| 1810 | } |
| 1811 | |
Guido van Rossum | 373c741 | 2003-01-07 13:41:37 +0000 | [diff] [blame] | 1812 | /* Three variants on the subtype_getsets list. */ |
| 1813 | |
| 1814 | static PyGetSetDef subtype_getsets_full[] = { |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1815 | {"__dict__", subtype_dict, subtype_setdict, |
Neal Norwitz | 858e34f | 2002-08-13 17:18:45 +0000 | [diff] [blame] | 1816 | PyDoc_STR("dictionary for instance variables (if defined)")}, |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1817 | {"__weakref__", subtype_getweakref, NULL, |
Neal Norwitz | 858e34f | 2002-08-13 17:18:45 +0000 | [diff] [blame] | 1818 | PyDoc_STR("list of weak references to the object (if defined)")}, |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1819 | {0} |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1820 | }; |
| 1821 | |
Guido van Rossum | 373c741 | 2003-01-07 13:41:37 +0000 | [diff] [blame] | 1822 | static PyGetSetDef subtype_getsets_dict_only[] = { |
| 1823 | {"__dict__", subtype_dict, subtype_setdict, |
| 1824 | PyDoc_STR("dictionary for instance variables (if defined)")}, |
| 1825 | {0} |
| 1826 | }; |
| 1827 | |
| 1828 | static PyGetSetDef subtype_getsets_weakref_only[] = { |
| 1829 | {"__weakref__", subtype_getweakref, NULL, |
| 1830 | PyDoc_STR("list of weak references to the object (if defined)")}, |
| 1831 | {0} |
| 1832 | }; |
| 1833 | |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 1834 | static int |
| 1835 | valid_identifier(PyObject *s) |
| 1836 | { |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 1837 | if (!PyUnicode_Check(s)) { |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1838 | PyErr_Format(PyExc_TypeError, |
| 1839 | "__slots__ items must be strings, not '%.200s'", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1840 | Py_TYPE(s)->tp_name); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 1841 | return 0; |
| 1842 | } |
Georg Brandl | f4780d0 | 2007-08-30 18:29:48 +0000 | [diff] [blame] | 1843 | if (!PyUnicode_IsIdentifier(s)) { |
| 1844 | PyErr_SetString(PyExc_TypeError, |
| 1845 | "__slots__ must be identifiers"); |
| 1846 | return 0; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 1847 | } |
| 1848 | return 1; |
| 1849 | } |
| 1850 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 1851 | /* Forward */ |
| 1852 | static int |
| 1853 | object_init(PyObject *self, PyObject *args, PyObject *kwds); |
| 1854 | |
| 1855 | static int |
| 1856 | type_init(PyObject *cls, PyObject *args, PyObject *kwds) |
| 1857 | { |
| 1858 | int res; |
| 1859 | |
| 1860 | assert(args != NULL && PyTuple_Check(args)); |
| 1861 | assert(kwds == NULL || PyDict_Check(kwds)); |
| 1862 | |
| 1863 | if (kwds != NULL && PyDict_Check(kwds) && PyDict_Size(kwds) != 0) { |
| 1864 | PyErr_SetString(PyExc_TypeError, |
| 1865 | "type.__init__() takes no keyword arguments"); |
| 1866 | return -1; |
| 1867 | } |
| 1868 | |
| 1869 | if (args != NULL && PyTuple_Check(args) && |
| 1870 | (PyTuple_GET_SIZE(args) != 1 && PyTuple_GET_SIZE(args) != 3)) { |
| 1871 | PyErr_SetString(PyExc_TypeError, |
| 1872 | "type.__init__() takes 1 or 3 arguments"); |
| 1873 | return -1; |
| 1874 | } |
| 1875 | |
| 1876 | /* Call object.__init__(self) now. */ |
| 1877 | /* XXX Could call super(type, cls).__init__() but what's the point? */ |
| 1878 | args = PyTuple_GetSlice(args, 0, 0); |
| 1879 | res = object_init(cls, args, NULL); |
| 1880 | Py_DECREF(args); |
| 1881 | return res; |
| 1882 | } |
| 1883 | |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1884 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1885 | type_new(PyTypeObject *metatype, PyObject *args, PyObject *kwds) |
| 1886 | { |
| 1887 | PyObject *name, *bases, *dict; |
Martin v. Löwis | 15e6274 | 2006-02-27 16:46:16 +0000 | [diff] [blame] | 1888 | static char *kwlist[] = {"name", "bases", "dict", 0}; |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 1889 | PyObject *slots, *tmp, *newslots; |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1890 | PyTypeObject *type, *base, *tmptype, *winner; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 1891 | PyHeapTypeObject *et; |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 1892 | PyMemberDef *mp; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1893 | Py_ssize_t i, nbases, nslots, slotoffset, add_dict, add_weak; |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1894 | int j, may_add_dict, may_add_weak; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1895 | |
Tim Peters | 3abca12 | 2001-10-27 19:37:48 +0000 | [diff] [blame] | 1896 | assert(args != NULL && PyTuple_Check(args)); |
| 1897 | assert(kwds == NULL || PyDict_Check(kwds)); |
| 1898 | |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1899 | /* Special case: type(x) should return x->ob_type */ |
Tim Peters | 3abca12 | 2001-10-27 19:37:48 +0000 | [diff] [blame] | 1900 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1901 | const Py_ssize_t nargs = PyTuple_GET_SIZE(args); |
| 1902 | const Py_ssize_t nkwds = kwds == NULL ? 0 : PyDict_Size(kwds); |
Tim Peters | 3abca12 | 2001-10-27 19:37:48 +0000 | [diff] [blame] | 1903 | |
| 1904 | if (PyType_CheckExact(metatype) && nargs == 1 && nkwds == 0) { |
| 1905 | PyObject *x = PyTuple_GET_ITEM(args, 0); |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1906 | Py_INCREF(Py_TYPE(x)); |
| 1907 | return (PyObject *) Py_TYPE(x); |
Tim Peters | 3abca12 | 2001-10-27 19:37:48 +0000 | [diff] [blame] | 1908 | } |
| 1909 | |
| 1910 | /* SF bug 475327 -- if that didn't trigger, we need 3 |
| 1911 | arguments. but PyArg_ParseTupleAndKeywords below may give |
| 1912 | a msg saying type() needs exactly 3. */ |
| 1913 | if (nargs + nkwds != 3) { |
| 1914 | PyErr_SetString(PyExc_TypeError, |
| 1915 | "type() takes 1 or 3 arguments"); |
| 1916 | return NULL; |
| 1917 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1918 | } |
| 1919 | |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1920 | /* Check arguments: (name, bases, dict) */ |
Guido van Rossum | 98297ee | 2007-11-06 21:34:58 +0000 | [diff] [blame] | 1921 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "UO!O!:type", kwlist, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1922 | &name, |
| 1923 | &PyTuple_Type, &bases, |
| 1924 | &PyDict_Type, &dict)) |
| 1925 | return NULL; |
| 1926 | |
| 1927 | /* Determine the proper metatype to deal with this, |
| 1928 | and check for metatype conflicts while we're at it. |
| 1929 | Note that if some other metatype wins to contract, |
| 1930 | it's possible that its instances are not types. */ |
| 1931 | nbases = PyTuple_GET_SIZE(bases); |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1932 | winner = metatype; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1933 | for (i = 0; i < nbases; i++) { |
| 1934 | tmp = PyTuple_GET_ITEM(bases, i); |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 1935 | tmptype = Py_TYPE(tmp); |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1936 | if (PyType_IsSubtype(winner, tmptype)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1937 | continue; |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1938 | if (PyType_IsSubtype(tmptype, winner)) { |
| 1939 | winner = tmptype; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1940 | continue; |
| 1941 | } |
| 1942 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 636688d | 2003-04-23 12:07:22 +0000 | [diff] [blame] | 1943 | "metaclass conflict: " |
| 1944 | "the metaclass of a derived class " |
| 1945 | "must be a (non-strict) subclass " |
| 1946 | "of the metaclasses of all its bases"); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1947 | return NULL; |
| 1948 | } |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1949 | if (winner != metatype) { |
| 1950 | if (winner->tp_new != type_new) /* Pass it to the winner */ |
| 1951 | return winner->tp_new(winner, args, kwds); |
| 1952 | metatype = winner; |
| 1953 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1954 | |
| 1955 | /* Adjust for empty tuple bases */ |
| 1956 | if (nbases == 0) { |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 1957 | bases = PyTuple_Pack(1, &PyBaseObject_Type); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1958 | if (bases == NULL) |
| 1959 | return NULL; |
| 1960 | nbases = 1; |
| 1961 | } |
| 1962 | else |
| 1963 | Py_INCREF(bases); |
| 1964 | |
| 1965 | /* XXX From here until type is allocated, "return NULL" leaks bases! */ |
| 1966 | |
| 1967 | /* Calculate best base, and check that all bases are type objects */ |
| 1968 | base = best_base(bases); |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 1969 | if (base == NULL) { |
| 1970 | Py_DECREF(bases); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1971 | return NULL; |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 1972 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1973 | if (!PyType_HasFeature(base, Py_TPFLAGS_BASETYPE)) { |
| 1974 | PyErr_Format(PyExc_TypeError, |
| 1975 | "type '%.100s' is not an acceptable base type", |
| 1976 | base->tp_name); |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 1977 | Py_DECREF(bases); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1978 | return NULL; |
| 1979 | } |
| 1980 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1981 | /* Check for a __slots__ sequence variable in dict, and count it */ |
| 1982 | slots = PyDict_GetItemString(dict, "__slots__"); |
| 1983 | nslots = 0; |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1984 | add_dict = 0; |
| 1985 | add_weak = 0; |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1986 | may_add_dict = base->tp_dictoffset == 0; |
| 1987 | may_add_weak = base->tp_weaklistoffset == 0 && base->tp_itemsize == 0; |
| 1988 | if (slots == NULL) { |
| 1989 | if (may_add_dict) { |
| 1990 | add_dict++; |
| 1991 | } |
| 1992 | if (may_add_weak) { |
| 1993 | add_weak++; |
| 1994 | } |
| 1995 | } |
| 1996 | else { |
| 1997 | /* Have slots */ |
| 1998 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1999 | /* Make it into a tuple */ |
Neal Norwitz | 80e7f27 | 2007-08-26 06:45:23 +0000 | [diff] [blame] | 2000 | if (PyUnicode_Check(slots)) |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 2001 | slots = PyTuple_Pack(1, slots); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2002 | else |
| 2003 | slots = PySequence_Tuple(slots); |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 2004 | if (slots == NULL) { |
| 2005 | Py_DECREF(bases); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2006 | return NULL; |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 2007 | } |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2008 | assert(PyTuple_Check(slots)); |
| 2009 | |
| 2010 | /* Are slots allowed? */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2011 | nslots = PyTuple_GET_SIZE(slots); |
Jeremy Hylton | 1c7a0ea | 2003-07-16 16:08:23 +0000 | [diff] [blame] | 2012 | if (nslots > 0 && base->tp_itemsize != 0) { |
Guido van Rossum | c414187 | 2001-08-30 04:43:35 +0000 | [diff] [blame] | 2013 | PyErr_Format(PyExc_TypeError, |
| 2014 | "nonempty __slots__ " |
| 2015 | "not supported for subtype of '%s'", |
| 2016 | base->tp_name); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2017 | bad_slots: |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 2018 | Py_DECREF(bases); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2019 | Py_DECREF(slots); |
Guido van Rossum | c414187 | 2001-08-30 04:43:35 +0000 | [diff] [blame] | 2020 | return NULL; |
| 2021 | } |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2022 | |
| 2023 | /* Check for valid slot names and two special cases */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2024 | for (i = 0; i < nslots; i++) { |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2025 | PyObject *tmp = PyTuple_GET_ITEM(slots, i); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2026 | if (!valid_identifier(tmp)) |
| 2027 | goto bad_slots; |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 2028 | assert(PyUnicode_Check(tmp)); |
| 2029 | if (PyUnicode_CompareWithASCIIString(tmp, "__dict__") == 0) { |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2030 | if (!may_add_dict || add_dict) { |
| 2031 | PyErr_SetString(PyExc_TypeError, |
| 2032 | "__dict__ slot disallowed: " |
| 2033 | "we already got one"); |
| 2034 | goto bad_slots; |
| 2035 | } |
| 2036 | add_dict++; |
| 2037 | } |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 2038 | if (PyUnicode_CompareWithASCIIString(tmp, "__weakref__") == 0) { |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2039 | if (!may_add_weak || add_weak) { |
| 2040 | PyErr_SetString(PyExc_TypeError, |
| 2041 | "__weakref__ slot disallowed: " |
| 2042 | "either we already got one, " |
| 2043 | "or __itemsize__ != 0"); |
| 2044 | goto bad_slots; |
| 2045 | } |
| 2046 | add_weak++; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2047 | } |
| 2048 | } |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2049 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2050 | /* Copy slots into a list, mangle names and sort them. |
| 2051 | Sorted names are needed for __class__ assignment. |
| 2052 | Convert them back to tuple at the end. |
| 2053 | */ |
| 2054 | newslots = PyList_New(nslots - add_dict - add_weak); |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2055 | if (newslots == NULL) |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2056 | goto bad_slots; |
| 2057 | for (i = j = 0; i < nslots; i++) { |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2058 | tmp = PyTuple_GET_ITEM(slots, i); |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 2059 | if ((add_dict && |
| 2060 | PyUnicode_CompareWithASCIIString(tmp, "__dict__") == 0) || |
| 2061 | (add_weak && |
| 2062 | PyUnicode_CompareWithASCIIString(tmp, "__weakref__") == 0)) |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2063 | continue; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2064 | tmp =_Py_Mangle(name, tmp); |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2065 | if (!tmp) |
| 2066 | goto bad_slots; |
| 2067 | PyList_SET_ITEM(newslots, j, tmp); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2068 | j++; |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2069 | } |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2070 | assert(j == nslots - add_dict - add_weak); |
| 2071 | nslots = j; |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2072 | Py_DECREF(slots); |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2073 | if (PyList_Sort(newslots) == -1) { |
| 2074 | Py_DECREF(bases); |
| 2075 | Py_DECREF(newslots); |
| 2076 | return NULL; |
| 2077 | } |
| 2078 | slots = PyList_AsTuple(newslots); |
| 2079 | Py_DECREF(newslots); |
| 2080 | if (slots == NULL) { |
| 2081 | Py_DECREF(bases); |
| 2082 | return NULL; |
| 2083 | } |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2084 | |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2085 | /* Secondary bases may provide weakrefs or dict */ |
| 2086 | if (nbases > 1 && |
| 2087 | ((may_add_dict && !add_dict) || |
| 2088 | (may_add_weak && !add_weak))) { |
| 2089 | for (i = 0; i < nbases; i++) { |
| 2090 | tmp = PyTuple_GET_ITEM(bases, i); |
| 2091 | if (tmp == (PyObject *)base) |
| 2092 | continue; /* Skip primary base */ |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2093 | assert(PyType_Check(tmp)); |
| 2094 | tmptype = (PyTypeObject *)tmp; |
| 2095 | if (may_add_dict && !add_dict && |
| 2096 | tmptype->tp_dictoffset != 0) |
| 2097 | add_dict++; |
| 2098 | if (may_add_weak && !add_weak && |
| 2099 | tmptype->tp_weaklistoffset != 0) |
| 2100 | add_weak++; |
| 2101 | if (may_add_dict && !add_dict) |
| 2102 | continue; |
| 2103 | if (may_add_weak && !add_weak) |
| 2104 | continue; |
| 2105 | /* Nothing more to check */ |
| 2106 | break; |
| 2107 | } |
| 2108 | } |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 2109 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2110 | |
| 2111 | /* XXX From here until type is safely allocated, |
| 2112 | "return NULL" may leak slots! */ |
| 2113 | |
| 2114 | /* Allocate the type object */ |
| 2115 | type = (PyTypeObject *)metatype->tp_alloc(metatype, nslots); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2116 | if (type == NULL) { |
| 2117 | Py_XDECREF(slots); |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 2118 | Py_DECREF(bases); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2119 | return NULL; |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2120 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2121 | |
| 2122 | /* Keep name and slots alive in the extended type object */ |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2123 | et = (PyHeapTypeObject *)type; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2124 | Py_INCREF(name); |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 2125 | et->ht_name = name; |
| 2126 | et->ht_slots = slots; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2127 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 2128 | /* Initialize tp_flags */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2129 | type->tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HEAPTYPE | |
| 2130 | Py_TPFLAGS_BASETYPE; |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2131 | if (base->tp_flags & Py_TPFLAGS_HAVE_GC) |
| 2132 | type->tp_flags |= Py_TPFLAGS_HAVE_GC; |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 2133 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 2134 | /* Initialize essential fields */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2135 | type->tp_as_number = &et->as_number; |
| 2136 | type->tp_as_sequence = &et->as_sequence; |
| 2137 | type->tp_as_mapping = &et->as_mapping; |
| 2138 | type->tp_as_buffer = &et->as_buffer; |
Marc-André Lemburg | 4cc0f24 | 2008-08-07 18:54:33 +0000 | [diff] [blame] | 2139 | type->tp_name = _PyUnicode_AsString(name); |
Neal Norwitz | 80e7f27 | 2007-08-26 06:45:23 +0000 | [diff] [blame] | 2140 | if (!type->tp_name) { |
| 2141 | Py_DECREF(type); |
| 2142 | return NULL; |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 2143 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2144 | |
| 2145 | /* Set tp_base and tp_bases */ |
| 2146 | type->tp_bases = bases; |
| 2147 | Py_INCREF(base); |
| 2148 | type->tp_base = base; |
| 2149 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 2150 | /* Initialize tp_dict from passed-in dict */ |
| 2151 | type->tp_dict = dict = PyDict_Copy(dict); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2152 | if (dict == NULL) { |
| 2153 | Py_DECREF(type); |
| 2154 | return NULL; |
| 2155 | } |
| 2156 | |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 2157 | /* Set __module__ in the dict */ |
| 2158 | if (PyDict_GetItemString(dict, "__module__") == NULL) { |
| 2159 | tmp = PyEval_GetGlobals(); |
| 2160 | if (tmp != NULL) { |
| 2161 | tmp = PyDict_GetItemString(tmp, "__name__"); |
| 2162 | if (tmp != NULL) { |
| 2163 | if (PyDict_SetItemString(dict, "__module__", |
| 2164 | tmp) < 0) |
| 2165 | return NULL; |
| 2166 | } |
| 2167 | } |
| 2168 | } |
| 2169 | |
Tim Peters | 2f93e28 | 2001-10-04 05:27:00 +0000 | [diff] [blame] | 2170 | /* Set tp_doc to a copy of dict['__doc__'], if the latter is there |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 2171 | and is a string. The __doc__ accessor will first look for tp_doc; |
| 2172 | if that fails, it will still look into __dict__. |
Tim Peters | 2f93e28 | 2001-10-04 05:27:00 +0000 | [diff] [blame] | 2173 | */ |
| 2174 | { |
| 2175 | PyObject *doc = PyDict_GetItemString(dict, "__doc__"); |
Neal Norwitz | 6ea45d3 | 2007-08-26 04:19:43 +0000 | [diff] [blame] | 2176 | if (doc != NULL && PyUnicode_Check(doc)) { |
Alexandre Vassalotti | a85998a | 2008-05-03 18:24:43 +0000 | [diff] [blame] | 2177 | Py_ssize_t len; |
| 2178 | char *doc_str; |
Neal Norwitz | 6ea45d3 | 2007-08-26 04:19:43 +0000 | [diff] [blame] | 2179 | char *tp_doc; |
Alexandre Vassalotti | a85998a | 2008-05-03 18:24:43 +0000 | [diff] [blame] | 2180 | |
Alexandre Vassalotti | 394996b | 2009-06-04 00:43:04 +0000 | [diff] [blame] | 2181 | doc_str = _PyUnicode_AsString(doc); |
Alexandre Vassalotti | a85998a | 2008-05-03 18:24:43 +0000 | [diff] [blame] | 2182 | if (doc_str == NULL) { |
Neal Norwitz | 6ea45d3 | 2007-08-26 04:19:43 +0000 | [diff] [blame] | 2183 | Py_DECREF(type); |
| 2184 | return NULL; |
Tim Peters | 2f93e28 | 2001-10-04 05:27:00 +0000 | [diff] [blame] | 2185 | } |
Alexandre Vassalotti | 394996b | 2009-06-04 00:43:04 +0000 | [diff] [blame] | 2186 | /* Silently truncate the docstring if it contains null bytes. */ |
| 2187 | len = strlen(doc_str); |
Alexandre Vassalotti | a85998a | 2008-05-03 18:24:43 +0000 | [diff] [blame] | 2188 | tp_doc = (char *)PyObject_MALLOC(len + 1); |
Neal Norwitz | 6ea45d3 | 2007-08-26 04:19:43 +0000 | [diff] [blame] | 2189 | if (tp_doc == NULL) { |
| 2190 | Py_DECREF(type); |
| 2191 | return NULL; |
Neal Norwitz | a369c5a | 2007-08-25 07:41:59 +0000 | [diff] [blame] | 2192 | } |
Alexandre Vassalotti | a85998a | 2008-05-03 18:24:43 +0000 | [diff] [blame] | 2193 | memcpy(tp_doc, doc_str, len + 1); |
Neal Norwitz | 6ea45d3 | 2007-08-26 04:19:43 +0000 | [diff] [blame] | 2194 | type->tp_doc = tp_doc; |
Tim Peters | 2f93e28 | 2001-10-04 05:27:00 +0000 | [diff] [blame] | 2195 | } |
| 2196 | } |
| 2197 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2198 | /* Special-case __new__: if it's a plain function, |
| 2199 | make it a static function */ |
| 2200 | tmp = PyDict_GetItemString(dict, "__new__"); |
| 2201 | if (tmp != NULL && PyFunction_Check(tmp)) { |
| 2202 | tmp = PyStaticMethod_New(tmp); |
| 2203 | if (tmp == NULL) { |
| 2204 | Py_DECREF(type); |
| 2205 | return NULL; |
| 2206 | } |
| 2207 | PyDict_SetItemString(dict, "__new__", tmp); |
| 2208 | Py_DECREF(tmp); |
| 2209 | } |
| 2210 | |
| 2211 | /* Add descriptors for custom slots from __slots__, or for __dict__ */ |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2212 | mp = PyHeapType_GET_MEMBERS(et); |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 2213 | slotoffset = base->tp_basicsize; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2214 | if (slots != NULL) { |
| 2215 | for (i = 0; i < nslots; i++, mp++) { |
Marc-André Lemburg | 4cc0f24 | 2008-08-07 18:54:33 +0000 | [diff] [blame] | 2216 | mp->name = _PyUnicode_AsString( |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2217 | PyTuple_GET_ITEM(slots, i)); |
Guido van Rossum | 64b206c | 2001-12-04 17:13:22 +0000 | [diff] [blame] | 2218 | mp->type = T_OBJECT_EX; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2219 | mp->offset = slotoffset; |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2220 | |
| 2221 | /* __dict__ and __weakref__ are already filtered out */ |
| 2222 | assert(strcmp(mp->name, "__dict__") != 0); |
| 2223 | assert(strcmp(mp->name, "__weakref__") != 0); |
| 2224 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2225 | slotoffset += sizeof(PyObject *); |
| 2226 | } |
| 2227 | } |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2228 | if (add_dict) { |
| 2229 | if (base->tp_itemsize) |
| 2230 | type->tp_dictoffset = -(long)sizeof(PyObject *); |
| 2231 | else |
| 2232 | type->tp_dictoffset = slotoffset; |
| 2233 | slotoffset += sizeof(PyObject *); |
| 2234 | } |
| 2235 | if (add_weak) { |
| 2236 | assert(!base->tp_itemsize); |
| 2237 | type->tp_weaklistoffset = slotoffset; |
| 2238 | slotoffset += sizeof(PyObject *); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2239 | } |
| 2240 | type->tp_basicsize = slotoffset; |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 2241 | type->tp_itemsize = base->tp_itemsize; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2242 | type->tp_members = PyHeapType_GET_MEMBERS(et); |
Guido van Rossum | 373c741 | 2003-01-07 13:41:37 +0000 | [diff] [blame] | 2243 | |
| 2244 | if (type->tp_weaklistoffset && type->tp_dictoffset) |
| 2245 | type->tp_getset = subtype_getsets_full; |
| 2246 | else if (type->tp_weaklistoffset && !type->tp_dictoffset) |
| 2247 | type->tp_getset = subtype_getsets_weakref_only; |
| 2248 | else if (!type->tp_weaklistoffset && type->tp_dictoffset) |
| 2249 | type->tp_getset = subtype_getsets_dict_only; |
| 2250 | else |
| 2251 | type->tp_getset = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2252 | |
| 2253 | /* Special case some slots */ |
| 2254 | if (type->tp_dictoffset != 0 || nslots > 0) { |
| 2255 | if (base->tp_getattr == NULL && base->tp_getattro == NULL) |
| 2256 | type->tp_getattro = PyObject_GenericGetAttr; |
| 2257 | if (base->tp_setattr == NULL && base->tp_setattro == NULL) |
| 2258 | type->tp_setattro = PyObject_GenericSetAttr; |
| 2259 | } |
| 2260 | type->tp_dealloc = subtype_dealloc; |
| 2261 | |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 2262 | /* Enable GC unless there are really no instance variables possible */ |
| 2263 | if (!(type->tp_basicsize == sizeof(PyObject) && |
| 2264 | type->tp_itemsize == 0)) |
| 2265 | type->tp_flags |= Py_TPFLAGS_HAVE_GC; |
| 2266 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2267 | /* Always override allocation strategy to use regular heap */ |
| 2268 | type->tp_alloc = PyType_GenericAlloc; |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2269 | if (type->tp_flags & Py_TPFLAGS_HAVE_GC) { |
Neil Schemenauer | 09a2ae5 | 2002-04-12 03:06:53 +0000 | [diff] [blame] | 2270 | type->tp_free = PyObject_GC_Del; |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 2271 | type->tp_traverse = subtype_traverse; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 2272 | type->tp_clear = subtype_clear; |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2273 | } |
| 2274 | else |
Neil Schemenauer | 09a2ae5 | 2002-04-12 03:06:53 +0000 | [diff] [blame] | 2275 | type->tp_free = PyObject_Del; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2276 | |
| 2277 | /* Initialize the rest */ |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 2278 | if (PyType_Ready(type) < 0) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2279 | Py_DECREF(type); |
| 2280 | return NULL; |
| 2281 | } |
| 2282 | |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 2283 | /* Put the proper slots in place */ |
| 2284 | fixup_slot_dispatchers(type); |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 2285 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2286 | return (PyObject *)type; |
| 2287 | } |
| 2288 | |
| 2289 | /* Internal API to look for a name through the MRO. |
| 2290 | This returns a borrowed reference, and doesn't set an exception! */ |
| 2291 | PyObject * |
| 2292 | _PyType_Lookup(PyTypeObject *type, PyObject *name) |
| 2293 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 2294 | Py_ssize_t i, n; |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 2295 | PyObject *mro, *res, *base, *dict; |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 2296 | unsigned int h; |
| 2297 | |
| 2298 | if (MCACHE_CACHEABLE_NAME(name) && |
Christian Heimes | 412dc9c | 2008-01-27 18:55:54 +0000 | [diff] [blame] | 2299 | PyType_HasFeature(type, Py_TPFLAGS_VALID_VERSION_TAG)) { |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 2300 | /* fast path */ |
| 2301 | h = MCACHE_HASH_METHOD(type, name); |
| 2302 | if (method_cache[h].version == type->tp_version_tag && |
| 2303 | method_cache[h].name == name) |
| 2304 | return method_cache[h].value; |
| 2305 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2306 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 2307 | /* Look in tp_dict of types in MRO */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2308 | mro = type->tp_mro; |
Guido van Rossum | 2309498 | 2002-06-10 14:30:43 +0000 | [diff] [blame] | 2309 | |
| 2310 | /* If mro is NULL, the type is either not yet initialized |
| 2311 | by PyType_Ready(), or already cleared by type_clear(). |
| 2312 | Either way the safest thing to do is to return NULL. */ |
| 2313 | if (mro == NULL) |
| 2314 | return NULL; |
| 2315 | |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 2316 | res = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2317 | assert(PyTuple_Check(mro)); |
| 2318 | n = PyTuple_GET_SIZE(mro); |
| 2319 | for (i = 0; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 2320 | base = PyTuple_GET_ITEM(mro, i); |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 2321 | assert(PyType_Check(base)); |
| 2322 | dict = ((PyTypeObject *)base)->tp_dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2323 | assert(dict && PyDict_Check(dict)); |
| 2324 | res = PyDict_GetItem(dict, name); |
| 2325 | if (res != NULL) |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 2326 | break; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2327 | } |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 2328 | |
| 2329 | if (MCACHE_CACHEABLE_NAME(name) && assign_version_tag(type)) { |
| 2330 | h = MCACHE_HASH_METHOD(type, name); |
| 2331 | method_cache[h].version = type->tp_version_tag; |
| 2332 | method_cache[h].value = res; /* borrowed */ |
| 2333 | Py_INCREF(name); |
| 2334 | Py_DECREF(method_cache[h].name); |
| 2335 | method_cache[h].name = name; |
| 2336 | } |
| 2337 | return res; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2338 | } |
| 2339 | |
| 2340 | /* This is similar to PyObject_GenericGetAttr(), |
| 2341 | but uses _PyType_Lookup() instead of just looking in type->tp_dict. */ |
| 2342 | static PyObject * |
| 2343 | type_getattro(PyTypeObject *type, PyObject *name) |
| 2344 | { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2345 | PyTypeObject *metatype = Py_TYPE(type); |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2346 | PyObject *meta_attribute, *attribute; |
| 2347 | descrgetfunc meta_get; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2348 | |
| 2349 | /* Initialize this type (we'll assume the metatype is initialized) */ |
| 2350 | if (type->tp_dict == NULL) { |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 2351 | if (PyType_Ready(type) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2352 | return NULL; |
| 2353 | } |
| 2354 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2355 | /* No readable descriptor found yet */ |
| 2356 | meta_get = NULL; |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 2357 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2358 | /* Look for the attribute in the metatype */ |
| 2359 | meta_attribute = _PyType_Lookup(metatype, name); |
| 2360 | |
| 2361 | if (meta_attribute != NULL) { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2362 | meta_get = Py_TYPE(meta_attribute)->tp_descr_get; |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 2363 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2364 | if (meta_get != NULL && PyDescr_IsData(meta_attribute)) { |
| 2365 | /* Data descriptors implement tp_descr_set to intercept |
| 2366 | * writes. Assume the attribute is not overridden in |
| 2367 | * type's tp_dict (and bases): call the descriptor now. |
| 2368 | */ |
| 2369 | return meta_get(meta_attribute, (PyObject *)type, |
| 2370 | (PyObject *)metatype); |
| 2371 | } |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 2372 | Py_INCREF(meta_attribute); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2373 | } |
| 2374 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2375 | /* No data descriptor found on metatype. Look in tp_dict of this |
| 2376 | * type and its bases */ |
| 2377 | attribute = _PyType_Lookup(type, name); |
| 2378 | if (attribute != NULL) { |
| 2379 | /* Implement descriptor functionality, if any */ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2380 | descrgetfunc local_get = Py_TYPE(attribute)->tp_descr_get; |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 2381 | |
| 2382 | Py_XDECREF(meta_attribute); |
| 2383 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2384 | if (local_get != NULL) { |
| 2385 | /* NULL 2nd argument indicates the descriptor was |
| 2386 | * found on the target object itself (or a base) */ |
| 2387 | return local_get(attribute, (PyObject *)NULL, |
| 2388 | (PyObject *)type); |
| 2389 | } |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 2390 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2391 | Py_INCREF(attribute); |
| 2392 | return attribute; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2393 | } |
| 2394 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2395 | /* No attribute found in local __dict__ (or bases): use the |
| 2396 | * descriptor from the metatype, if any */ |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 2397 | if (meta_get != NULL) { |
| 2398 | PyObject *res; |
| 2399 | res = meta_get(meta_attribute, (PyObject *)type, |
| 2400 | (PyObject *)metatype); |
| 2401 | Py_DECREF(meta_attribute); |
| 2402 | return res; |
| 2403 | } |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2404 | |
| 2405 | /* If an ordinary attribute was found on the metatype, return it now */ |
| 2406 | if (meta_attribute != NULL) { |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2407 | return meta_attribute; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2408 | } |
| 2409 | |
| 2410 | /* Give up */ |
| 2411 | PyErr_Format(PyExc_AttributeError, |
Walter Dörwald | 7516360 | 2007-06-11 15:47:13 +0000 | [diff] [blame] | 2412 | "type object '%.50s' has no attribute '%U'", |
| 2413 | type->tp_name, name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2414 | return NULL; |
| 2415 | } |
| 2416 | |
| 2417 | static int |
| 2418 | type_setattro(PyTypeObject *type, PyObject *name, PyObject *value) |
| 2419 | { |
Guido van Rossum | 2f3ca6e | 2001-10-15 21:05:10 +0000 | [diff] [blame] | 2420 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
| 2421 | PyErr_Format( |
| 2422 | PyExc_TypeError, |
| 2423 | "can't set attributes of built-in/extension type '%s'", |
| 2424 | type->tp_name); |
| 2425 | return -1; |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 2426 | } |
Guido van Rossum | 2f3ca6e | 2001-10-15 21:05:10 +0000 | [diff] [blame] | 2427 | if (PyObject_GenericSetAttr((PyObject *)type, name, value) < 0) |
| 2428 | return -1; |
| 2429 | return update_slot(type, name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2430 | } |
| 2431 | |
| 2432 | static void |
| 2433 | type_dealloc(PyTypeObject *type) |
| 2434 | { |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2435 | PyHeapTypeObject *et; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2436 | |
| 2437 | /* Assert this is a heap-allocated type object */ |
| 2438 | assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2439 | _PyObject_GC_UNTRACK(type); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2440 | PyObject_ClearWeakRefs((PyObject *)type); |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2441 | et = (PyHeapTypeObject *)type; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2442 | Py_XDECREF(type->tp_base); |
| 2443 | Py_XDECREF(type->tp_dict); |
| 2444 | Py_XDECREF(type->tp_bases); |
| 2445 | Py_XDECREF(type->tp_mro); |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 2446 | Py_XDECREF(type->tp_cache); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2447 | Py_XDECREF(type->tp_subclasses); |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2448 | /* A type's tp_doc is heap allocated, unlike the tp_doc slots |
| 2449 | * of most other objects. It's okay to cast it to char *. |
| 2450 | */ |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 2451 | PyObject_Free((char *)type->tp_doc); |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 2452 | Py_XDECREF(et->ht_name); |
| 2453 | Py_XDECREF(et->ht_slots); |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2454 | Py_TYPE(type)->tp_free((PyObject *)type); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2455 | } |
| 2456 | |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2457 | static PyObject * |
| 2458 | type_subclasses(PyTypeObject *type, PyObject *args_ignored) |
| 2459 | { |
| 2460 | PyObject *list, *raw, *ref; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 2461 | Py_ssize_t i, n; |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2462 | |
| 2463 | list = PyList_New(0); |
| 2464 | if (list == NULL) |
| 2465 | return NULL; |
| 2466 | raw = type->tp_subclasses; |
| 2467 | if (raw == NULL) |
| 2468 | return list; |
| 2469 | assert(PyList_Check(raw)); |
| 2470 | n = PyList_GET_SIZE(raw); |
| 2471 | for (i = 0; i < n; i++) { |
| 2472 | ref = PyList_GET_ITEM(raw, i); |
Tim Peters | 4438338 | 2001-10-08 16:49:26 +0000 | [diff] [blame] | 2473 | assert(PyWeakref_CheckRef(ref)); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2474 | ref = PyWeakref_GET_OBJECT(ref); |
| 2475 | if (ref != Py_None) { |
| 2476 | if (PyList_Append(list, ref) < 0) { |
| 2477 | Py_DECREF(list); |
| 2478 | return NULL; |
| 2479 | } |
| 2480 | } |
| 2481 | } |
| 2482 | return list; |
| 2483 | } |
| 2484 | |
Guido van Rossum | 4737482 | 2007-08-02 16:48:17 +0000 | [diff] [blame] | 2485 | static PyObject * |
| 2486 | type_prepare(PyObject *self, PyObject *args, PyObject *kwds) |
| 2487 | { |
| 2488 | return PyDict_New(); |
| 2489 | } |
| 2490 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2491 | static PyMethodDef type_methods[] = { |
Martin v. Löwis | e3eb1f2 | 2001-08-16 13:15:00 +0000 | [diff] [blame] | 2492 | {"mro", (PyCFunction)mro_external, METH_NOARGS, |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 2493 | PyDoc_STR("mro() -> list\nreturn a type's method resolution order")}, |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2494 | {"__subclasses__", (PyCFunction)type_subclasses, METH_NOARGS, |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 2495 | PyDoc_STR("__subclasses__() -> list of immediate subclasses")}, |
Guido van Rossum | 4737482 | 2007-08-02 16:48:17 +0000 | [diff] [blame] | 2496 | {"__prepare__", (PyCFunction)type_prepare, |
| 2497 | METH_VARARGS | METH_KEYWORDS | METH_CLASS, |
| 2498 | PyDoc_STR("__prepare__() -> dict\n" |
| 2499 | "used to create the namespace for the class statement")}, |
Benjamin Peterson | 88fe5f9 | 2009-05-16 21:55:24 +0000 | [diff] [blame] | 2500 | {"__instancecheck__", type___instancecheck__, METH_O, |
| 2501 | PyDoc_STR("__instancecheck__() -> check if an object is an instance")}, |
| 2502 | {"__subclasscheck__", type___subclasscheck__, METH_O, |
| 2503 | PyDoc_STR("__subclasschck__ -> check if an class is a subclass")}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2504 | {0} |
| 2505 | }; |
| 2506 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 2507 | PyDoc_STRVAR(type_doc, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2508 | "type(object) -> the object's type\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 2509 | "type(name, bases, dict) -> a new type"); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2510 | |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2511 | static int |
| 2512 | type_traverse(PyTypeObject *type, visitproc visit, void *arg) |
| 2513 | { |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2514 | /* Because of type_is_gc(), the collector only calls this |
| 2515 | for heaptypes. */ |
| 2516 | assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2517 | |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2518 | Py_VISIT(type->tp_dict); |
| 2519 | Py_VISIT(type->tp_cache); |
| 2520 | Py_VISIT(type->tp_mro); |
| 2521 | Py_VISIT(type->tp_bases); |
| 2522 | Py_VISIT(type->tp_base); |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2523 | |
| 2524 | /* There's no need to visit type->tp_subclasses or |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 2525 | ((PyHeapTypeObject *)type)->ht_slots, because they can't be involved |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2526 | in cycles; tp_subclasses is a list of weak references, |
| 2527 | and slots is a tuple of strings. */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2528 | |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2529 | return 0; |
| 2530 | } |
| 2531 | |
| 2532 | static int |
| 2533 | type_clear(PyTypeObject *type) |
| 2534 | { |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2535 | /* Because of type_is_gc(), the collector only calls this |
| 2536 | for heaptypes. */ |
| 2537 | assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2538 | |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2539 | /* The only field we need to clear is tp_mro, which is part of a |
| 2540 | hard cycle (its first element is the class itself) that won't |
| 2541 | be broken otherwise (it's a tuple and tuples don't have a |
| 2542 | tp_clear handler). None of the other fields need to be |
| 2543 | cleared, and here's why: |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2544 | |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2545 | tp_dict: |
| 2546 | It is a dict, so the collector will call its tp_clear. |
| 2547 | |
| 2548 | tp_cache: |
| 2549 | Not used; if it were, it would be a dict. |
| 2550 | |
| 2551 | tp_bases, tp_base: |
| 2552 | If these are involved in a cycle, there must be at least |
| 2553 | one other, mutable object in the cycle, e.g. a base |
| 2554 | class's dict; the cycle will be broken that way. |
| 2555 | |
| 2556 | tp_subclasses: |
| 2557 | A list of weak references can't be part of a cycle; and |
| 2558 | lists have their own tp_clear. |
| 2559 | |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2560 | slots (in PyHeapTypeObject): |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2561 | A tuple of strings can't be part of a cycle. |
| 2562 | */ |
| 2563 | |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2564 | Py_CLEAR(type->tp_mro); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2565 | |
| 2566 | return 0; |
| 2567 | } |
| 2568 | |
| 2569 | static int |
| 2570 | type_is_gc(PyTypeObject *type) |
| 2571 | { |
| 2572 | return type->tp_flags & Py_TPFLAGS_HEAPTYPE; |
| 2573 | } |
| 2574 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 2575 | PyTypeObject PyType_Type = { |
Martin v. Löwis | 9f2e346 | 2007-07-21 17:22:18 +0000 | [diff] [blame] | 2576 | PyVarObject_HEAD_INIT(&PyType_Type, 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2577 | "type", /* tp_name */ |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2578 | sizeof(PyHeapTypeObject), /* tp_basicsize */ |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 2579 | sizeof(PyMemberDef), /* tp_itemsize */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2580 | (destructor)type_dealloc, /* tp_dealloc */ |
| 2581 | 0, /* tp_print */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2582 | 0, /* tp_getattr */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2583 | 0, /* tp_setattr */ |
Mark Dickinson | e94c679 | 2009-02-02 20:36:42 +0000 | [diff] [blame] | 2584 | 0, /* tp_reserved */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2585 | (reprfunc)type_repr, /* tp_repr */ |
| 2586 | 0, /* tp_as_number */ |
| 2587 | 0, /* tp_as_sequence */ |
| 2588 | 0, /* tp_as_mapping */ |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 2589 | 0, /* tp_hash */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2590 | (ternaryfunc)type_call, /* tp_call */ |
| 2591 | 0, /* tp_str */ |
| 2592 | (getattrofunc)type_getattro, /* tp_getattro */ |
| 2593 | (setattrofunc)type_setattro, /* tp_setattro */ |
| 2594 | 0, /* tp_as_buffer */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2595 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
Thomas Wouters | 27d517b | 2007-02-25 20:39:11 +0000 | [diff] [blame] | 2596 | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_TYPE_SUBCLASS, /* tp_flags */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2597 | type_doc, /* tp_doc */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2598 | (traverseproc)type_traverse, /* tp_traverse */ |
| 2599 | (inquiry)type_clear, /* tp_clear */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2600 | 0, /* tp_richcompare */ |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2601 | offsetof(PyTypeObject, tp_weaklist), /* tp_weaklistoffset */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2602 | 0, /* tp_iter */ |
| 2603 | 0, /* tp_iternext */ |
| 2604 | type_methods, /* tp_methods */ |
| 2605 | type_members, /* tp_members */ |
| 2606 | type_getsets, /* tp_getset */ |
| 2607 | 0, /* tp_base */ |
| 2608 | 0, /* tp_dict */ |
| 2609 | 0, /* tp_descr_get */ |
| 2610 | 0, /* tp_descr_set */ |
| 2611 | offsetof(PyTypeObject, tp_dict), /* tp_dictoffset */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2612 | type_init, /* tp_init */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2613 | 0, /* tp_alloc */ |
| 2614 | type_new, /* tp_new */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2615 | PyObject_GC_Del, /* tp_free */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2616 | (inquiry)type_is_gc, /* tp_is_gc */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 2617 | }; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2618 | |
| 2619 | |
| 2620 | /* The base type of all types (eventually)... except itself. */ |
| 2621 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2622 | /* You may wonder why object.__new__() only complains about arguments |
| 2623 | when object.__init__() is not overridden, and vice versa. |
| 2624 | |
| 2625 | Consider the use cases: |
| 2626 | |
| 2627 | 1. When neither is overridden, we want to hear complaints about |
| 2628 | excess (i.e., any) arguments, since their presence could |
| 2629 | indicate there's a bug. |
| 2630 | |
| 2631 | 2. When defining an Immutable type, we are likely to override only |
| 2632 | __new__(), since __init__() is called too late to initialize an |
| 2633 | Immutable object. Since __new__() defines the signature for the |
| 2634 | type, it would be a pain to have to override __init__() just to |
| 2635 | stop it from complaining about excess arguments. |
| 2636 | |
| 2637 | 3. When defining a Mutable type, we are likely to override only |
| 2638 | __init__(). So here the converse reasoning applies: we don't |
| 2639 | want to have to override __new__() just to stop it from |
| 2640 | complaining. |
| 2641 | |
| 2642 | 4. When __init__() is overridden, and the subclass __init__() calls |
| 2643 | object.__init__(), the latter should complain about excess |
| 2644 | arguments; ditto for __new__(). |
| 2645 | |
| 2646 | Use cases 2 and 3 make it unattractive to unconditionally check for |
| 2647 | excess arguments. The best solution that addresses all four use |
| 2648 | cases is as follows: __init__() complains about excess arguments |
| 2649 | unless __new__() is overridden and __init__() is not overridden |
| 2650 | (IOW, if __init__() is overridden or __new__() is not overridden); |
| 2651 | symmetrically, __new__() complains about excess arguments unless |
| 2652 | __init__() is overridden and __new__() is not overridden |
| 2653 | (IOW, if __new__() is overridden or __init__() is not overridden). |
| 2654 | |
| 2655 | However, for backwards compatibility, this breaks too much code. |
| 2656 | Therefore, in 2.6, we'll *warn* about excess arguments when both |
| 2657 | methods are overridden; for all other cases we'll use the above |
| 2658 | rules. |
| 2659 | |
| 2660 | */ |
| 2661 | |
| 2662 | /* Forward */ |
| 2663 | static PyObject * |
| 2664 | object_new(PyTypeObject *type, PyObject *args, PyObject *kwds); |
| 2665 | |
| 2666 | static int |
| 2667 | excess_args(PyObject *args, PyObject *kwds) |
| 2668 | { |
| 2669 | return PyTuple_GET_SIZE(args) || |
| 2670 | (kwds && PyDict_Check(kwds) && PyDict_Size(kwds)); |
| 2671 | } |
| 2672 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2673 | static int |
| 2674 | object_init(PyObject *self, PyObject *args, PyObject *kwds) |
| 2675 | { |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2676 | int err = 0; |
| 2677 | if (excess_args(args, kwds)) { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2678 | PyTypeObject *type = Py_TYPE(self); |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2679 | if (type->tp_init != object_init && |
| 2680 | type->tp_new != object_new) |
| 2681 | { |
| 2682 | err = PyErr_WarnEx(PyExc_DeprecationWarning, |
| 2683 | "object.__init__() takes no parameters", |
| 2684 | 1); |
| 2685 | } |
| 2686 | else if (type->tp_init != object_init || |
| 2687 | type->tp_new == object_new) |
| 2688 | { |
| 2689 | PyErr_SetString(PyExc_TypeError, |
| 2690 | "object.__init__() takes no parameters"); |
| 2691 | err = -1; |
| 2692 | } |
| 2693 | } |
| 2694 | return err; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2695 | } |
| 2696 | |
Guido van Rossum | 298e421 | 2003-02-13 16:30:16 +0000 | [diff] [blame] | 2697 | static PyObject * |
| 2698 | object_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2699 | { |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2700 | int err = 0; |
| 2701 | if (excess_args(args, kwds)) { |
| 2702 | if (type->tp_new != object_new && |
| 2703 | type->tp_init != object_init) |
| 2704 | { |
| 2705 | err = PyErr_WarnEx(PyExc_DeprecationWarning, |
| 2706 | "object.__new__() takes no parameters", |
| 2707 | 1); |
| 2708 | } |
| 2709 | else if (type->tp_new != object_new || |
| 2710 | type->tp_init == object_init) |
| 2711 | { |
| 2712 | PyErr_SetString(PyExc_TypeError, |
| 2713 | "object.__new__() takes no parameters"); |
| 2714 | err = -1; |
| 2715 | } |
Guido van Rossum | 298e421 | 2003-02-13 16:30:16 +0000 | [diff] [blame] | 2716 | } |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2717 | if (err < 0) |
| 2718 | return NULL; |
Christian Heimes | 9e7f1d2 | 2008-02-28 12:27:11 +0000 | [diff] [blame] | 2719 | |
| 2720 | if (type->tp_flags & Py_TPFLAGS_IS_ABSTRACT) { |
| 2721 | static PyObject *comma = NULL; |
| 2722 | PyObject *abstract_methods = NULL; |
| 2723 | PyObject *builtins; |
| 2724 | PyObject *sorted; |
| 2725 | PyObject *sorted_methods = NULL; |
| 2726 | PyObject *joined = NULL; |
| 2727 | |
| 2728 | /* Compute ", ".join(sorted(type.__abstractmethods__)) |
| 2729 | into joined. */ |
| 2730 | abstract_methods = type_abstractmethods(type, NULL); |
| 2731 | if (abstract_methods == NULL) |
| 2732 | goto error; |
| 2733 | builtins = PyEval_GetBuiltins(); |
| 2734 | if (builtins == NULL) |
| 2735 | goto error; |
| 2736 | sorted = PyDict_GetItemString(builtins, "sorted"); |
| 2737 | if (sorted == NULL) |
| 2738 | goto error; |
| 2739 | sorted_methods = PyObject_CallFunctionObjArgs(sorted, |
| 2740 | abstract_methods, |
| 2741 | NULL); |
| 2742 | if (sorted_methods == NULL) |
| 2743 | goto error; |
| 2744 | if (comma == NULL) { |
| 2745 | comma = PyUnicode_InternFromString(", "); |
| 2746 | if (comma == NULL) |
| 2747 | goto error; |
| 2748 | } |
| 2749 | joined = PyObject_CallMethod(comma, "join", |
| 2750 | "O", sorted_methods); |
| 2751 | if (joined == NULL) |
| 2752 | goto error; |
| 2753 | |
| 2754 | PyErr_Format(PyExc_TypeError, |
| 2755 | "Can't instantiate abstract class %s " |
| 2756 | "with abstract methods %U", |
| 2757 | type->tp_name, |
| 2758 | joined); |
| 2759 | error: |
| 2760 | Py_XDECREF(joined); |
| 2761 | Py_XDECREF(sorted_methods); |
| 2762 | Py_XDECREF(abstract_methods); |
| 2763 | return NULL; |
| 2764 | } |
Guido van Rossum | 298e421 | 2003-02-13 16:30:16 +0000 | [diff] [blame] | 2765 | return type->tp_alloc(type, 0); |
| 2766 | } |
| 2767 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2768 | static void |
| 2769 | object_dealloc(PyObject *self) |
| 2770 | { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2771 | Py_TYPE(self)->tp_free(self); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2772 | } |
| 2773 | |
Guido van Rossum | 8e24818 | 2001-08-12 05:17:56 +0000 | [diff] [blame] | 2774 | static PyObject * |
| 2775 | object_repr(PyObject *self) |
| 2776 | { |
Guido van Rossum | 76e6963 | 2001-08-16 18:52:43 +0000 | [diff] [blame] | 2777 | PyTypeObject *type; |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 2778 | PyObject *mod, *name, *rtn; |
Guido van Rossum | 8e24818 | 2001-08-12 05:17:56 +0000 | [diff] [blame] | 2779 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2780 | type = Py_TYPE(self); |
Guido van Rossum | 76e6963 | 2001-08-16 18:52:43 +0000 | [diff] [blame] | 2781 | mod = type_module(type, NULL); |
| 2782 | if (mod == NULL) |
| 2783 | PyErr_Clear(); |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 2784 | else if (!PyUnicode_Check(mod)) { |
Guido van Rossum | 76e6963 | 2001-08-16 18:52:43 +0000 | [diff] [blame] | 2785 | Py_DECREF(mod); |
| 2786 | mod = NULL; |
| 2787 | } |
| 2788 | name = type_name(type, NULL); |
| 2789 | if (name == NULL) |
| 2790 | return NULL; |
Georg Brandl | 1a3284e | 2007-12-02 09:40:06 +0000 | [diff] [blame] | 2791 | if (mod != NULL && PyUnicode_CompareWithASCIIString(mod, "builtins")) |
Walter Dörwald | 4dbd01b | 2007-06-11 14:03:45 +0000 | [diff] [blame] | 2792 | rtn = PyUnicode_FromFormat("<%U.%U object at %p>", mod, name, self); |
Guido van Rossum | 76e6963 | 2001-08-16 18:52:43 +0000 | [diff] [blame] | 2793 | else |
Walter Dörwald | 1ab8330 | 2007-05-18 17:15:44 +0000 | [diff] [blame] | 2794 | rtn = PyUnicode_FromFormat("<%s object at %p>", |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 2795 | type->tp_name, self); |
Guido van Rossum | 76e6963 | 2001-08-16 18:52:43 +0000 | [diff] [blame] | 2796 | Py_XDECREF(mod); |
| 2797 | Py_DECREF(name); |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 2798 | return rtn; |
Guido van Rossum | 8e24818 | 2001-08-12 05:17:56 +0000 | [diff] [blame] | 2799 | } |
| 2800 | |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 2801 | static PyObject * |
| 2802 | object_str(PyObject *self) |
| 2803 | { |
| 2804 | unaryfunc f; |
| 2805 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2806 | f = Py_TYPE(self)->tp_repr; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 2807 | if (f == NULL) |
| 2808 | f = object_repr; |
| 2809 | return f(self); |
| 2810 | } |
| 2811 | |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2812 | static PyObject * |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 2813 | object_richcompare(PyObject *self, PyObject *other, int op) |
| 2814 | { |
| 2815 | PyObject *res; |
| 2816 | |
| 2817 | switch (op) { |
| 2818 | |
| 2819 | case Py_EQ: |
Guido van Rossum | ab078dd | 2008-01-06 00:09:11 +0000 | [diff] [blame] | 2820 | /* Return NotImplemented instead of False, so if two |
| 2821 | objects are compared, both get a chance at the |
| 2822 | comparison. See issue #1393. */ |
| 2823 | res = (self == other) ? Py_True : Py_NotImplemented; |
Guido van Rossum | 6b18a5b | 2007-03-29 20:49:57 +0000 | [diff] [blame] | 2824 | Py_INCREF(res); |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 2825 | break; |
| 2826 | |
| 2827 | case Py_NE: |
Guido van Rossum | e27dc72 | 2007-03-27 22:37:34 +0000 | [diff] [blame] | 2828 | /* By default, != returns the opposite of ==, |
| 2829 | unless the latter returns NotImplemented. */ |
| 2830 | res = PyObject_RichCompare(self, other, Py_EQ); |
| 2831 | if (res != NULL && res != Py_NotImplemented) { |
| 2832 | int ok = PyObject_IsTrue(res); |
| 2833 | Py_DECREF(res); |
| 2834 | if (ok < 0) |
| 2835 | res = NULL; |
| 2836 | else { |
| 2837 | if (ok) |
| 2838 | res = Py_False; |
| 2839 | else |
| 2840 | res = Py_True; |
| 2841 | Py_INCREF(res); |
| 2842 | } |
| 2843 | } |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 2844 | break; |
| 2845 | |
| 2846 | default: |
| 2847 | res = Py_NotImplemented; |
Guido van Rossum | 6b18a5b | 2007-03-29 20:49:57 +0000 | [diff] [blame] | 2848 | Py_INCREF(res); |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 2849 | break; |
| 2850 | } |
| 2851 | |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 2852 | return res; |
| 2853 | } |
| 2854 | |
| 2855 | static PyObject * |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2856 | object_get_class(PyObject *self, void *closure) |
| 2857 | { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2858 | Py_INCREF(Py_TYPE(self)); |
| 2859 | return (PyObject *)(Py_TYPE(self)); |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2860 | } |
| 2861 | |
| 2862 | static int |
| 2863 | equiv_structs(PyTypeObject *a, PyTypeObject *b) |
| 2864 | { |
| 2865 | return a == b || |
| 2866 | (a != NULL && |
| 2867 | b != NULL && |
| 2868 | a->tp_basicsize == b->tp_basicsize && |
| 2869 | a->tp_itemsize == b->tp_itemsize && |
| 2870 | a->tp_dictoffset == b->tp_dictoffset && |
| 2871 | a->tp_weaklistoffset == b->tp_weaklistoffset && |
| 2872 | ((a->tp_flags & Py_TPFLAGS_HAVE_GC) == |
| 2873 | (b->tp_flags & Py_TPFLAGS_HAVE_GC))); |
| 2874 | } |
| 2875 | |
| 2876 | static int |
| 2877 | same_slots_added(PyTypeObject *a, PyTypeObject *b) |
| 2878 | { |
| 2879 | PyTypeObject *base = a->tp_base; |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 2880 | Py_ssize_t size; |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2881 | PyObject *slots_a, *slots_b; |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2882 | |
| 2883 | if (base != b->tp_base) |
| 2884 | return 0; |
| 2885 | if (equiv_structs(a, base) && equiv_structs(b, base)) |
| 2886 | return 1; |
| 2887 | size = base->tp_basicsize; |
| 2888 | if (a->tp_dictoffset == size && b->tp_dictoffset == size) |
| 2889 | size += sizeof(PyObject *); |
| 2890 | if (a->tp_weaklistoffset == size && b->tp_weaklistoffset == size) |
| 2891 | size += sizeof(PyObject *); |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2892 | |
| 2893 | /* Check slots compliance */ |
| 2894 | slots_a = ((PyHeapTypeObject *)a)->ht_slots; |
| 2895 | slots_b = ((PyHeapTypeObject *)b)->ht_slots; |
| 2896 | if (slots_a && slots_b) { |
Mark Dickinson | f02e0aa | 2009-02-01 12:13:56 +0000 | [diff] [blame] | 2897 | if (PyObject_RichCompareBool(slots_a, slots_b, Py_EQ) != 1) |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 2898 | return 0; |
| 2899 | size += sizeof(PyObject *) * PyTuple_GET_SIZE(slots_a); |
| 2900 | } |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2901 | return size == a->tp_basicsize && size == b->tp_basicsize; |
| 2902 | } |
| 2903 | |
| 2904 | static int |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2905 | compatible_for_assignment(PyTypeObject* oldto, PyTypeObject* newto, char* attr) |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2906 | { |
| 2907 | PyTypeObject *newbase, *oldbase; |
| 2908 | |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2909 | if (newto->tp_dealloc != oldto->tp_dealloc || |
| 2910 | newto->tp_free != oldto->tp_free) |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2911 | { |
| 2912 | PyErr_Format(PyExc_TypeError, |
| 2913 | "%s assignment: " |
| 2914 | "'%s' deallocator differs from '%s'", |
| 2915 | attr, |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2916 | newto->tp_name, |
| 2917 | oldto->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2918 | return 0; |
| 2919 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2920 | newbase = newto; |
| 2921 | oldbase = oldto; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2922 | while (equiv_structs(newbase, newbase->tp_base)) |
| 2923 | newbase = newbase->tp_base; |
| 2924 | while (equiv_structs(oldbase, oldbase->tp_base)) |
| 2925 | oldbase = oldbase->tp_base; |
| 2926 | if (newbase != oldbase && |
| 2927 | (newbase->tp_base != oldbase->tp_base || |
| 2928 | !same_slots_added(newbase, oldbase))) { |
| 2929 | PyErr_Format(PyExc_TypeError, |
| 2930 | "%s assignment: " |
| 2931 | "'%s' object layout differs from '%s'", |
| 2932 | attr, |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2933 | newto->tp_name, |
| 2934 | oldto->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2935 | return 0; |
| 2936 | } |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 2937 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2938 | return 1; |
| 2939 | } |
| 2940 | |
| 2941 | static int |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2942 | object_set_class(PyObject *self, PyObject *value, void *closure) |
| 2943 | { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2944 | PyTypeObject *oldto = Py_TYPE(self); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2945 | PyTypeObject *newto; |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2946 | |
Guido van Rossum | b6b8942 | 2002-04-15 01:03:30 +0000 | [diff] [blame] | 2947 | if (value == NULL) { |
| 2948 | PyErr_SetString(PyExc_TypeError, |
| 2949 | "can't delete __class__ attribute"); |
| 2950 | return -1; |
| 2951 | } |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2952 | if (!PyType_Check(value)) { |
| 2953 | PyErr_Format(PyExc_TypeError, |
| 2954 | "__class__ must be set to new-style class, not '%s' object", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2955 | Py_TYPE(value)->tp_name); |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2956 | return -1; |
| 2957 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2958 | newto = (PyTypeObject *)value; |
| 2959 | if (!(newto->tp_flags & Py_TPFLAGS_HEAPTYPE) || |
| 2960 | !(oldto->tp_flags & Py_TPFLAGS_HEAPTYPE)) |
Guido van Rossum | 40af889 | 2002-08-10 05:42:07 +0000 | [diff] [blame] | 2961 | { |
| 2962 | PyErr_Format(PyExc_TypeError, |
| 2963 | "__class__ assignment: only for heap types"); |
| 2964 | return -1; |
| 2965 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2966 | if (compatible_for_assignment(newto, oldto, "__class__")) { |
| 2967 | Py_INCREF(newto); |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 2968 | Py_TYPE(self) = newto; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 2969 | Py_DECREF(oldto); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2970 | return 0; |
| 2971 | } |
| 2972 | else { |
Guido van Rossum | 9ee4b94 | 2002-05-24 18:47:47 +0000 | [diff] [blame] | 2973 | return -1; |
| 2974 | } |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2975 | } |
| 2976 | |
| 2977 | static PyGetSetDef object_getsets[] = { |
| 2978 | {"__class__", object_get_class, object_set_class, |
Neal Norwitz | 858e34f | 2002-08-13 17:18:45 +0000 | [diff] [blame] | 2979 | PyDoc_STR("the object's class")}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2980 | {0} |
| 2981 | }; |
| 2982 | |
Guido van Rossum | c53f009 | 2003-02-18 22:05:12 +0000 | [diff] [blame] | 2983 | |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 2984 | /* Stuff to implement __reduce_ex__ for pickle protocols >= 2. |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 2985 | We fall back to helpers in copyreg for: |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 2986 | - pickle protocols < 2 |
| 2987 | - calculating the list of slot names (done only once per class) |
| 2988 | - the __newobj__ function (which is used as a token but never called) |
| 2989 | */ |
| 2990 | |
| 2991 | static PyObject * |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 2992 | import_copyreg(void) |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 2993 | { |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 2994 | static PyObject *copyreg_str; |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 2995 | |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 2996 | if (!copyreg_str) { |
| 2997 | copyreg_str = PyUnicode_InternFromString("copyreg"); |
| 2998 | if (copyreg_str == NULL) |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 2999 | return NULL; |
| 3000 | } |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3001 | |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3002 | return PyImport_Import(copyreg_str); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3003 | } |
| 3004 | |
| 3005 | static PyObject * |
| 3006 | slotnames(PyObject *cls) |
| 3007 | { |
| 3008 | PyObject *clsdict; |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3009 | PyObject *copyreg; |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3010 | PyObject *slotnames; |
| 3011 | |
| 3012 | if (!PyType_Check(cls)) { |
| 3013 | Py_INCREF(Py_None); |
| 3014 | return Py_None; |
| 3015 | } |
| 3016 | |
| 3017 | clsdict = ((PyTypeObject *)cls)->tp_dict; |
| 3018 | slotnames = PyDict_GetItemString(clsdict, "__slotnames__"); |
Armin Rigo | ec862b9 | 2005-09-24 22:58:41 +0000 | [diff] [blame] | 3019 | if (slotnames != NULL && PyList_Check(slotnames)) { |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3020 | Py_INCREF(slotnames); |
| 3021 | return slotnames; |
| 3022 | } |
| 3023 | |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3024 | copyreg = import_copyreg(); |
| 3025 | if (copyreg == NULL) |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3026 | return NULL; |
| 3027 | |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3028 | slotnames = PyObject_CallMethod(copyreg, "_slotnames", "O", cls); |
| 3029 | Py_DECREF(copyreg); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3030 | if (slotnames != NULL && |
| 3031 | slotnames != Py_None && |
| 3032 | !PyList_Check(slotnames)) |
| 3033 | { |
| 3034 | PyErr_SetString(PyExc_TypeError, |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3035 | "copyreg._slotnames didn't return a list or None"); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3036 | Py_DECREF(slotnames); |
| 3037 | slotnames = NULL; |
| 3038 | } |
| 3039 | |
| 3040 | return slotnames; |
| 3041 | } |
| 3042 | |
| 3043 | static PyObject * |
| 3044 | reduce_2(PyObject *obj) |
| 3045 | { |
| 3046 | PyObject *cls, *getnewargs; |
| 3047 | PyObject *args = NULL, *args2 = NULL; |
| 3048 | PyObject *getstate = NULL, *state = NULL, *names = NULL; |
| 3049 | PyObject *slots = NULL, *listitems = NULL, *dictitems = NULL; |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3050 | PyObject *copyreg = NULL, *newobj = NULL, *res = NULL; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 3051 | Py_ssize_t i, n; |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3052 | |
| 3053 | cls = PyObject_GetAttrString(obj, "__class__"); |
| 3054 | if (cls == NULL) |
| 3055 | return NULL; |
| 3056 | |
| 3057 | getnewargs = PyObject_GetAttrString(obj, "__getnewargs__"); |
| 3058 | if (getnewargs != NULL) { |
| 3059 | args = PyObject_CallObject(getnewargs, NULL); |
| 3060 | Py_DECREF(getnewargs); |
| 3061 | if (args != NULL && !PyTuple_Check(args)) { |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 3062 | PyErr_Format(PyExc_TypeError, |
| 3063 | "__getnewargs__ should return a tuple, " |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 3064 | "not '%.200s'", Py_TYPE(args)->tp_name); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3065 | goto end; |
| 3066 | } |
| 3067 | } |
| 3068 | else { |
| 3069 | PyErr_Clear(); |
| 3070 | args = PyTuple_New(0); |
| 3071 | } |
| 3072 | if (args == NULL) |
| 3073 | goto end; |
| 3074 | |
| 3075 | getstate = PyObject_GetAttrString(obj, "__getstate__"); |
| 3076 | if (getstate != NULL) { |
| 3077 | state = PyObject_CallObject(getstate, NULL); |
| 3078 | Py_DECREF(getstate); |
Neal Norwitz | e2fdc61 | 2003-06-08 13:19:58 +0000 | [diff] [blame] | 3079 | if (state == NULL) |
| 3080 | goto end; |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3081 | } |
| 3082 | else { |
Jim Fulton | 8a1a594 | 2004-02-08 04:21:26 +0000 | [diff] [blame] | 3083 | PyErr_Clear(); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3084 | state = PyObject_GetAttrString(obj, "__dict__"); |
| 3085 | if (state == NULL) { |
| 3086 | PyErr_Clear(); |
| 3087 | state = Py_None; |
| 3088 | Py_INCREF(state); |
| 3089 | } |
| 3090 | names = slotnames(cls); |
| 3091 | if (names == NULL) |
| 3092 | goto end; |
| 3093 | if (names != Py_None) { |
| 3094 | assert(PyList_Check(names)); |
| 3095 | slots = PyDict_New(); |
| 3096 | if (slots == NULL) |
| 3097 | goto end; |
| 3098 | n = 0; |
| 3099 | /* Can't pre-compute the list size; the list |
| 3100 | is stored on the class so accessible to other |
| 3101 | threads, which may be run by DECREF */ |
| 3102 | for (i = 0; i < PyList_GET_SIZE(names); i++) { |
| 3103 | PyObject *name, *value; |
| 3104 | name = PyList_GET_ITEM(names, i); |
| 3105 | value = PyObject_GetAttr(obj, name); |
| 3106 | if (value == NULL) |
| 3107 | PyErr_Clear(); |
| 3108 | else { |
| 3109 | int err = PyDict_SetItem(slots, name, |
| 3110 | value); |
| 3111 | Py_DECREF(value); |
| 3112 | if (err) |
| 3113 | goto end; |
| 3114 | n++; |
| 3115 | } |
| 3116 | } |
| 3117 | if (n) { |
| 3118 | state = Py_BuildValue("(NO)", state, slots); |
| 3119 | if (state == NULL) |
| 3120 | goto end; |
| 3121 | } |
| 3122 | } |
| 3123 | } |
| 3124 | |
| 3125 | if (!PyList_Check(obj)) { |
| 3126 | listitems = Py_None; |
| 3127 | Py_INCREF(listitems); |
| 3128 | } |
| 3129 | else { |
| 3130 | listitems = PyObject_GetIter(obj); |
| 3131 | if (listitems == NULL) |
| 3132 | goto end; |
| 3133 | } |
| 3134 | |
| 3135 | if (!PyDict_Check(obj)) { |
| 3136 | dictitems = Py_None; |
| 3137 | Py_INCREF(dictitems); |
| 3138 | } |
| 3139 | else { |
Guido van Rossum | cc2b016 | 2007-02-11 06:12:03 +0000 | [diff] [blame] | 3140 | PyObject *items = PyObject_CallMethod(obj, "items", ""); |
| 3141 | if (items == NULL) |
| 3142 | goto end; |
| 3143 | dictitems = PyObject_GetIter(items); |
| 3144 | Py_DECREF(items); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3145 | if (dictitems == NULL) |
| 3146 | goto end; |
| 3147 | } |
| 3148 | |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3149 | copyreg = import_copyreg(); |
| 3150 | if (copyreg == NULL) |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3151 | goto end; |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3152 | newobj = PyObject_GetAttrString(copyreg, "__newobj__"); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3153 | if (newobj == NULL) |
| 3154 | goto end; |
| 3155 | |
| 3156 | n = PyTuple_GET_SIZE(args); |
| 3157 | args2 = PyTuple_New(n+1); |
| 3158 | if (args2 == NULL) |
| 3159 | goto end; |
| 3160 | PyTuple_SET_ITEM(args2, 0, cls); |
| 3161 | cls = NULL; |
| 3162 | for (i = 0; i < n; i++) { |
| 3163 | PyObject *v = PyTuple_GET_ITEM(args, i); |
| 3164 | Py_INCREF(v); |
| 3165 | PyTuple_SET_ITEM(args2, i+1, v); |
| 3166 | } |
| 3167 | |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 3168 | res = PyTuple_Pack(5, newobj, args2, state, listitems, dictitems); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3169 | |
| 3170 | end: |
| 3171 | Py_XDECREF(cls); |
| 3172 | Py_XDECREF(args); |
| 3173 | Py_XDECREF(args2); |
Jeremy Hylton | d06483c | 2003-04-09 21:01:42 +0000 | [diff] [blame] | 3174 | Py_XDECREF(slots); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3175 | Py_XDECREF(state); |
| 3176 | Py_XDECREF(names); |
| 3177 | Py_XDECREF(listitems); |
| 3178 | Py_XDECREF(dictitems); |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3179 | Py_XDECREF(copyreg); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3180 | Py_XDECREF(newobj); |
| 3181 | return res; |
| 3182 | } |
| 3183 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3184 | /* |
| 3185 | * There were two problems when object.__reduce__ and object.__reduce_ex__ |
| 3186 | * were implemented in the same function: |
| 3187 | * - trying to pickle an object with a custom __reduce__ method that |
| 3188 | * fell back to object.__reduce__ in certain circumstances led to |
| 3189 | * infinite recursion at Python level and eventual RuntimeError. |
| 3190 | * - Pickling objects that lied about their type by overwriting the |
| 3191 | * __class__ descriptor could lead to infinite recursion at C level |
| 3192 | * and eventual segfault. |
| 3193 | * |
| 3194 | * Because of backwards compatibility, the two methods still have to |
| 3195 | * behave in the same way, even if this is not required by the pickle |
| 3196 | * protocol. This common functionality was moved to the _common_reduce |
| 3197 | * function. |
| 3198 | */ |
| 3199 | static PyObject * |
| 3200 | _common_reduce(PyObject *self, int proto) |
| 3201 | { |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3202 | PyObject *copyreg, *res; |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3203 | |
| 3204 | if (proto >= 2) |
| 3205 | return reduce_2(self); |
| 3206 | |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3207 | copyreg = import_copyreg(); |
| 3208 | if (!copyreg) |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3209 | return NULL; |
| 3210 | |
Alexandre Vassalotti | f7fa63d | 2008-05-11 08:55:36 +0000 | [diff] [blame] | 3211 | res = PyEval_CallMethod(copyreg, "_reduce_ex", "(Oi)", self, proto); |
| 3212 | Py_DECREF(copyreg); |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3213 | |
| 3214 | return res; |
| 3215 | } |
| 3216 | |
| 3217 | static PyObject * |
| 3218 | object_reduce(PyObject *self, PyObject *args) |
| 3219 | { |
| 3220 | int proto = 0; |
| 3221 | |
| 3222 | if (!PyArg_ParseTuple(args, "|i:__reduce__", &proto)) |
| 3223 | return NULL; |
| 3224 | |
| 3225 | return _common_reduce(self, proto); |
| 3226 | } |
| 3227 | |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3228 | static PyObject * |
| 3229 | object_reduce_ex(PyObject *self, PyObject *args) |
| 3230 | { |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3231 | PyObject *reduce, *res; |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3232 | int proto = 0; |
| 3233 | |
| 3234 | if (!PyArg_ParseTuple(args, "|i:__reduce_ex__", &proto)) |
| 3235 | return NULL; |
| 3236 | |
| 3237 | reduce = PyObject_GetAttrString(self, "__reduce__"); |
| 3238 | if (reduce == NULL) |
| 3239 | PyErr_Clear(); |
| 3240 | else { |
| 3241 | PyObject *cls, *clsreduce, *objreduce; |
| 3242 | int override; |
| 3243 | cls = PyObject_GetAttrString(self, "__class__"); |
| 3244 | if (cls == NULL) { |
| 3245 | Py_DECREF(reduce); |
| 3246 | return NULL; |
| 3247 | } |
| 3248 | clsreduce = PyObject_GetAttrString(cls, "__reduce__"); |
| 3249 | Py_DECREF(cls); |
| 3250 | if (clsreduce == NULL) { |
| 3251 | Py_DECREF(reduce); |
| 3252 | return NULL; |
| 3253 | } |
| 3254 | objreduce = PyDict_GetItemString(PyBaseObject_Type.tp_dict, |
| 3255 | "__reduce__"); |
| 3256 | override = (clsreduce != objreduce); |
| 3257 | Py_DECREF(clsreduce); |
| 3258 | if (override) { |
| 3259 | res = PyObject_CallObject(reduce, NULL); |
| 3260 | Py_DECREF(reduce); |
| 3261 | return res; |
| 3262 | } |
| 3263 | else |
| 3264 | Py_DECREF(reduce); |
| 3265 | } |
| 3266 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3267 | return _common_reduce(self, proto); |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 3268 | } |
| 3269 | |
Christian Heimes | 9e7f1d2 | 2008-02-28 12:27:11 +0000 | [diff] [blame] | 3270 | static PyObject * |
| 3271 | object_subclasshook(PyObject *cls, PyObject *args) |
| 3272 | { |
| 3273 | Py_INCREF(Py_NotImplemented); |
| 3274 | return Py_NotImplemented; |
| 3275 | } |
| 3276 | |
| 3277 | PyDoc_STRVAR(object_subclasshook_doc, |
| 3278 | "Abstract classes can override this to customize issubclass().\n" |
| 3279 | "\n" |
| 3280 | "This is invoked early on by abc.ABCMeta.__subclasscheck__().\n" |
| 3281 | "It should return True, False or NotImplemented. If it returns\n" |
| 3282 | "NotImplemented, the normal algorithm is used. Otherwise, it\n" |
| 3283 | "overrides the normal algorithm (and the outcome is cached).\n"); |
Eric Smith | 8c66326 | 2007-08-25 02:26:07 +0000 | [diff] [blame] | 3284 | |
| 3285 | /* |
| 3286 | from PEP 3101, this code implements: |
| 3287 | |
| 3288 | class object: |
| 3289 | def __format__(self, format_spec): |
| 3290 | return format(str(self), format_spec) |
| 3291 | */ |
| 3292 | static PyObject * |
| 3293 | object_format(PyObject *self, PyObject *args) |
| 3294 | { |
| 3295 | PyObject *format_spec; |
| 3296 | PyObject *self_as_str = NULL; |
| 3297 | PyObject *result = NULL; |
| 3298 | PyObject *format_meth = NULL; |
| 3299 | |
Eric Smith | fc6e8fe | 2008-01-11 00:17:22 +0000 | [diff] [blame] | 3300 | if (!PyArg_ParseTuple(args, "U:__format__", &format_spec)) |
Eric Smith | 8c66326 | 2007-08-25 02:26:07 +0000 | [diff] [blame] | 3301 | return NULL; |
Eric Smith | 8c66326 | 2007-08-25 02:26:07 +0000 | [diff] [blame] | 3302 | |
Thomas Heller | 519a042 | 2007-11-15 20:48:54 +0000 | [diff] [blame] | 3303 | self_as_str = PyObject_Str(self); |
Eric Smith | 8c66326 | 2007-08-25 02:26:07 +0000 | [diff] [blame] | 3304 | if (self_as_str != NULL) { |
| 3305 | /* find the format function */ |
| 3306 | format_meth = PyObject_GetAttrString(self_as_str, "__format__"); |
| 3307 | if (format_meth != NULL) { |
| 3308 | /* and call it */ |
| 3309 | result = PyObject_CallFunctionObjArgs(format_meth, format_spec, NULL); |
| 3310 | } |
| 3311 | } |
| 3312 | |
| 3313 | Py_XDECREF(self_as_str); |
| 3314 | Py_XDECREF(format_meth); |
| 3315 | |
| 3316 | return result; |
| 3317 | } |
| 3318 | |
Martin v. Löwis | 00709aa | 2008-06-04 14:18:43 +0000 | [diff] [blame] | 3319 | static PyObject * |
| 3320 | object_sizeof(PyObject *self, PyObject *args) |
| 3321 | { |
| 3322 | Py_ssize_t res, isize; |
| 3323 | |
| 3324 | res = 0; |
| 3325 | isize = self->ob_type->tp_itemsize; |
| 3326 | if (isize > 0) |
| 3327 | res = Py_SIZE(self->ob_type) * isize; |
| 3328 | res += self->ob_type->tp_basicsize; |
| 3329 | |
| 3330 | return PyLong_FromSsize_t(res); |
| 3331 | } |
| 3332 | |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 3333 | static PyMethodDef object_methods[] = { |
Guido van Rossum | c53f009 | 2003-02-18 22:05:12 +0000 | [diff] [blame] | 3334 | {"__reduce_ex__", object_reduce_ex, METH_VARARGS, |
| 3335 | PyDoc_STR("helper for pickle")}, |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3336 | {"__reduce__", object_reduce, METH_VARARGS, |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 3337 | PyDoc_STR("helper for pickle")}, |
Christian Heimes | 9e7f1d2 | 2008-02-28 12:27:11 +0000 | [diff] [blame] | 3338 | {"__subclasshook__", object_subclasshook, METH_CLASS | METH_VARARGS, |
| 3339 | object_subclasshook_doc}, |
Eric Smith | 8c66326 | 2007-08-25 02:26:07 +0000 | [diff] [blame] | 3340 | {"__format__", object_format, METH_VARARGS, |
| 3341 | PyDoc_STR("default object formatter")}, |
Martin v. Löwis | 00709aa | 2008-06-04 14:18:43 +0000 | [diff] [blame] | 3342 | {"__sizeof__", object_sizeof, METH_NOARGS, |
| 3343 | PyDoc_STR("__sizeof__() -> size of object in memory, in bytes")}, |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 3344 | {0} |
| 3345 | }; |
| 3346 | |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3347 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3348 | PyTypeObject PyBaseObject_Type = { |
Martin v. Löwis | 9f2e346 | 2007-07-21 17:22:18 +0000 | [diff] [blame] | 3349 | PyVarObject_HEAD_INIT(&PyType_Type, 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3350 | "object", /* tp_name */ |
| 3351 | sizeof(PyObject), /* tp_basicsize */ |
| 3352 | 0, /* tp_itemsize */ |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 3353 | object_dealloc, /* tp_dealloc */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3354 | 0, /* tp_print */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3355 | 0, /* tp_getattr */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3356 | 0, /* tp_setattr */ |
Mark Dickinson | e94c679 | 2009-02-02 20:36:42 +0000 | [diff] [blame] | 3357 | 0, /* tp_reserved */ |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3358 | object_repr, /* tp_repr */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3359 | 0, /* tp_as_number */ |
| 3360 | 0, /* tp_as_sequence */ |
| 3361 | 0, /* tp_as_mapping */ |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 3362 | (hashfunc)_Py_HashPointer, /* tp_hash */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3363 | 0, /* tp_call */ |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3364 | object_str, /* tp_str */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3365 | PyObject_GenericGetAttr, /* tp_getattro */ |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3366 | PyObject_GenericSetAttr, /* tp_setattro */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3367 | 0, /* tp_as_buffer */ |
| 3368 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 3369 | PyDoc_STR("The most base type"), /* tp_doc */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3370 | 0, /* tp_traverse */ |
| 3371 | 0, /* tp_clear */ |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 3372 | object_richcompare, /* tp_richcompare */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3373 | 0, /* tp_weaklistoffset */ |
| 3374 | 0, /* tp_iter */ |
| 3375 | 0, /* tp_iternext */ |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 3376 | object_methods, /* tp_methods */ |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 3377 | 0, /* tp_members */ |
| 3378 | object_getsets, /* tp_getset */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3379 | 0, /* tp_base */ |
| 3380 | 0, /* tp_dict */ |
| 3381 | 0, /* tp_descr_get */ |
| 3382 | 0, /* tp_descr_set */ |
| 3383 | 0, /* tp_dictoffset */ |
| 3384 | object_init, /* tp_init */ |
| 3385 | PyType_GenericAlloc, /* tp_alloc */ |
Guido van Rossum | 298e421 | 2003-02-13 16:30:16 +0000 | [diff] [blame] | 3386 | object_new, /* tp_new */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3387 | PyObject_Del, /* tp_free */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3388 | }; |
| 3389 | |
| 3390 | |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 3391 | /* Add the methods from tp_methods to the __dict__ in a type object */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3392 | |
| 3393 | static int |
| 3394 | add_methods(PyTypeObject *type, PyMethodDef *meth) |
| 3395 | { |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3396 | PyObject *dict = type->tp_dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3397 | |
| 3398 | for (; meth->ml_name != NULL; meth++) { |
| 3399 | PyObject *descr; |
Raymond Hettinger | 8f5cdaa | 2003-12-13 11:26:12 +0000 | [diff] [blame] | 3400 | if (PyDict_GetItemString(dict, meth->ml_name) && |
| 3401 | !(meth->ml_flags & METH_COEXIST)) |
| 3402 | continue; |
Fred Drake | 7bf9715 | 2002-03-28 05:33:33 +0000 | [diff] [blame] | 3403 | if (meth->ml_flags & METH_CLASS) { |
| 3404 | if (meth->ml_flags & METH_STATIC) { |
| 3405 | PyErr_SetString(PyExc_ValueError, |
| 3406 | "method cannot be both class and static"); |
| 3407 | return -1; |
| 3408 | } |
Tim Peters | bca1cbc | 2002-12-09 22:56:13 +0000 | [diff] [blame] | 3409 | descr = PyDescr_NewClassMethod(type, meth); |
Fred Drake | 7bf9715 | 2002-03-28 05:33:33 +0000 | [diff] [blame] | 3410 | } |
| 3411 | else if (meth->ml_flags & METH_STATIC) { |
Guido van Rossum | 9af48ff | 2003-02-11 17:12:46 +0000 | [diff] [blame] | 3412 | PyObject *cfunc = PyCFunction_New(meth, NULL); |
| 3413 | if (cfunc == NULL) |
| 3414 | return -1; |
| 3415 | descr = PyStaticMethod_New(cfunc); |
| 3416 | Py_DECREF(cfunc); |
Fred Drake | 7bf9715 | 2002-03-28 05:33:33 +0000 | [diff] [blame] | 3417 | } |
| 3418 | else { |
| 3419 | descr = PyDescr_NewMethod(type, meth); |
| 3420 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3421 | if (descr == NULL) |
| 3422 | return -1; |
Fred Drake | 7bf9715 | 2002-03-28 05:33:33 +0000 | [diff] [blame] | 3423 | if (PyDict_SetItemString(dict, meth->ml_name, descr) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3424 | return -1; |
| 3425 | Py_DECREF(descr); |
| 3426 | } |
| 3427 | return 0; |
| 3428 | } |
| 3429 | |
| 3430 | static int |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 3431 | add_members(PyTypeObject *type, PyMemberDef *memb) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3432 | { |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3433 | PyObject *dict = type->tp_dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3434 | |
| 3435 | for (; memb->name != NULL; memb++) { |
| 3436 | PyObject *descr; |
| 3437 | if (PyDict_GetItemString(dict, memb->name)) |
| 3438 | continue; |
| 3439 | descr = PyDescr_NewMember(type, memb); |
| 3440 | if (descr == NULL) |
| 3441 | return -1; |
| 3442 | if (PyDict_SetItemString(dict, memb->name, descr) < 0) |
| 3443 | return -1; |
| 3444 | Py_DECREF(descr); |
| 3445 | } |
| 3446 | return 0; |
| 3447 | } |
| 3448 | |
| 3449 | static int |
Guido van Rossum | 32d34c8 | 2001-09-20 21:45:26 +0000 | [diff] [blame] | 3450 | add_getset(PyTypeObject *type, PyGetSetDef *gsp) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3451 | { |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3452 | PyObject *dict = type->tp_dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3453 | |
| 3454 | for (; gsp->name != NULL; gsp++) { |
| 3455 | PyObject *descr; |
| 3456 | if (PyDict_GetItemString(dict, gsp->name)) |
| 3457 | continue; |
| 3458 | descr = PyDescr_NewGetSet(type, gsp); |
| 3459 | |
| 3460 | if (descr == NULL) |
| 3461 | return -1; |
| 3462 | if (PyDict_SetItemString(dict, gsp->name, descr) < 0) |
| 3463 | return -1; |
| 3464 | Py_DECREF(descr); |
| 3465 | } |
| 3466 | return 0; |
| 3467 | } |
| 3468 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3469 | static void |
| 3470 | inherit_special(PyTypeObject *type, PyTypeObject *base) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3471 | { |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 3472 | Py_ssize_t oldsize, newsize; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3473 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3474 | /* Copying basicsize is connected to the GC flags */ |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 3475 | oldsize = base->tp_basicsize; |
| 3476 | newsize = type->tp_basicsize ? type->tp_basicsize : oldsize; |
| 3477 | if (!(type->tp_flags & Py_TPFLAGS_HAVE_GC) && |
| 3478 | (base->tp_flags & Py_TPFLAGS_HAVE_GC) && |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3479 | (!type->tp_traverse && !type->tp_clear)) { |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 3480 | type->tp_flags |= Py_TPFLAGS_HAVE_GC; |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3481 | if (type->tp_traverse == NULL) |
| 3482 | type->tp_traverse = base->tp_traverse; |
| 3483 | if (type->tp_clear == NULL) |
| 3484 | type->tp_clear = base->tp_clear; |
| 3485 | } |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 3486 | { |
Guido van Rossum | f884b74 | 2001-12-17 17:14:22 +0000 | [diff] [blame] | 3487 | /* The condition below could use some explanation. |
| 3488 | It appears that tp_new is not inherited for static types |
| 3489 | whose base class is 'object'; this seems to be a precaution |
| 3490 | so that old extension types don't suddenly become |
| 3491 | callable (object.__new__ wouldn't insure the invariants |
| 3492 | that the extension type's own factory function ensures). |
| 3493 | Heap types, of course, are under our control, so they do |
| 3494 | inherit tp_new; static extension types that specify some |
| 3495 | other built-in type as the default are considered |
| 3496 | new-style-aware so they also inherit object.__new__. */ |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3497 | if (base != &PyBaseObject_Type || |
| 3498 | (type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
| 3499 | if (type->tp_new == NULL) |
| 3500 | type->tp_new = base->tp_new; |
| 3501 | } |
| 3502 | } |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 3503 | type->tp_basicsize = newsize; |
Guido van Rossum | 4dd64ab | 2001-08-14 20:04:48 +0000 | [diff] [blame] | 3504 | |
| 3505 | /* Copy other non-function slots */ |
| 3506 | |
| 3507 | #undef COPYVAL |
| 3508 | #define COPYVAL(SLOT) \ |
| 3509 | if (type->SLOT == 0) type->SLOT = base->SLOT |
| 3510 | |
| 3511 | COPYVAL(tp_itemsize); |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 3512 | COPYVAL(tp_weaklistoffset); |
| 3513 | COPYVAL(tp_dictoffset); |
Thomas Wouters | 27d517b | 2007-02-25 20:39:11 +0000 | [diff] [blame] | 3514 | |
| 3515 | /* Setup fast subclass flags */ |
| 3516 | if (PyType_IsSubtype(base, (PyTypeObject*)PyExc_BaseException)) |
| 3517 | type->tp_flags |= Py_TPFLAGS_BASE_EXC_SUBCLASS; |
| 3518 | else if (PyType_IsSubtype(base, &PyType_Type)) |
| 3519 | type->tp_flags |= Py_TPFLAGS_TYPE_SUBCLASS; |
| 3520 | else if (PyType_IsSubtype(base, &PyLong_Type)) |
| 3521 | type->tp_flags |= Py_TPFLAGS_LONG_SUBCLASS; |
Christian Heimes | 72b710a | 2008-05-26 13:28:38 +0000 | [diff] [blame] | 3522 | else if (PyType_IsSubtype(base, &PyBytes_Type)) |
| 3523 | type->tp_flags |= Py_TPFLAGS_BYTES_SUBCLASS; |
Thomas Wouters | 27d517b | 2007-02-25 20:39:11 +0000 | [diff] [blame] | 3524 | else if (PyType_IsSubtype(base, &PyUnicode_Type)) |
| 3525 | type->tp_flags |= Py_TPFLAGS_UNICODE_SUBCLASS; |
| 3526 | else if (PyType_IsSubtype(base, &PyTuple_Type)) |
| 3527 | type->tp_flags |= Py_TPFLAGS_TUPLE_SUBCLASS; |
| 3528 | else if (PyType_IsSubtype(base, &PyList_Type)) |
| 3529 | type->tp_flags |= Py_TPFLAGS_LIST_SUBCLASS; |
| 3530 | else if (PyType_IsSubtype(base, &PyDict_Type)) |
| 3531 | type->tp_flags |= Py_TPFLAGS_DICT_SUBCLASS; |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3532 | } |
| 3533 | |
Guido van Rossum | f5243f0 | 2008-01-01 04:06:48 +0000 | [diff] [blame] | 3534 | static char *hash_name_op[] = { |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3535 | "__eq__", |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3536 | "__hash__", |
Guido van Rossum | f5243f0 | 2008-01-01 04:06:48 +0000 | [diff] [blame] | 3537 | NULL |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3538 | }; |
| 3539 | |
| 3540 | static int |
Guido van Rossum | f5243f0 | 2008-01-01 04:06:48 +0000 | [diff] [blame] | 3541 | overrides_hash(PyTypeObject *type) |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3542 | { |
Guido van Rossum | f5243f0 | 2008-01-01 04:06:48 +0000 | [diff] [blame] | 3543 | char **p; |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3544 | PyObject *dict = type->tp_dict; |
| 3545 | |
| 3546 | assert(dict != NULL); |
Guido van Rossum | f5243f0 | 2008-01-01 04:06:48 +0000 | [diff] [blame] | 3547 | for (p = hash_name_op; *p; p++) { |
| 3548 | if (PyDict_GetItemString(dict, *p) != NULL) |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3549 | return 1; |
| 3550 | } |
| 3551 | return 0; |
| 3552 | } |
| 3553 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3554 | static void |
| 3555 | inherit_slots(PyTypeObject *type, PyTypeObject *base) |
| 3556 | { |
| 3557 | PyTypeObject *basebase; |
| 3558 | |
| 3559 | #undef SLOTDEFINED |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3560 | #undef COPYSLOT |
| 3561 | #undef COPYNUM |
| 3562 | #undef COPYSEQ |
| 3563 | #undef COPYMAP |
Guido van Rossum | 5af588b | 2001-10-12 14:13:21 +0000 | [diff] [blame] | 3564 | #undef COPYBUF |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3565 | |
| 3566 | #define SLOTDEFINED(SLOT) \ |
| 3567 | (base->SLOT != 0 && \ |
| 3568 | (basebase == NULL || base->SLOT != basebase->SLOT)) |
| 3569 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3570 | #define COPYSLOT(SLOT) \ |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3571 | if (!type->SLOT && SLOTDEFINED(SLOT)) type->SLOT = base->SLOT |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3572 | |
| 3573 | #define COPYNUM(SLOT) COPYSLOT(tp_as_number->SLOT) |
| 3574 | #define COPYSEQ(SLOT) COPYSLOT(tp_as_sequence->SLOT) |
| 3575 | #define COPYMAP(SLOT) COPYSLOT(tp_as_mapping->SLOT) |
Tim Peters | fc57ccb | 2001-10-12 02:38:24 +0000 | [diff] [blame] | 3576 | #define COPYBUF(SLOT) COPYSLOT(tp_as_buffer->SLOT) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3577 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3578 | /* This won't inherit indirect slots (from tp_as_number etc.) |
| 3579 | if type doesn't provide the space. */ |
| 3580 | |
| 3581 | if (type->tp_as_number != NULL && base->tp_as_number != NULL) { |
| 3582 | basebase = base->tp_base; |
| 3583 | if (basebase->tp_as_number == NULL) |
| 3584 | basebase = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3585 | COPYNUM(nb_add); |
| 3586 | COPYNUM(nb_subtract); |
| 3587 | COPYNUM(nb_multiply); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3588 | COPYNUM(nb_remainder); |
| 3589 | COPYNUM(nb_divmod); |
| 3590 | COPYNUM(nb_power); |
| 3591 | COPYNUM(nb_negative); |
| 3592 | COPYNUM(nb_positive); |
| 3593 | COPYNUM(nb_absolute); |
Jack Diederich | 4dafcc4 | 2006-11-28 19:15:13 +0000 | [diff] [blame] | 3594 | COPYNUM(nb_bool); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3595 | COPYNUM(nb_invert); |
| 3596 | COPYNUM(nb_lshift); |
| 3597 | COPYNUM(nb_rshift); |
| 3598 | COPYNUM(nb_and); |
| 3599 | COPYNUM(nb_xor); |
| 3600 | COPYNUM(nb_or); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3601 | COPYNUM(nb_int); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3602 | COPYNUM(nb_float); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3603 | COPYNUM(nb_inplace_add); |
| 3604 | COPYNUM(nb_inplace_subtract); |
| 3605 | COPYNUM(nb_inplace_multiply); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3606 | COPYNUM(nb_inplace_remainder); |
| 3607 | COPYNUM(nb_inplace_power); |
| 3608 | COPYNUM(nb_inplace_lshift); |
| 3609 | COPYNUM(nb_inplace_rshift); |
| 3610 | COPYNUM(nb_inplace_and); |
| 3611 | COPYNUM(nb_inplace_xor); |
| 3612 | COPYNUM(nb_inplace_or); |
Neal Norwitz | bcc0db8 | 2006-03-24 08:14:36 +0000 | [diff] [blame] | 3613 | COPYNUM(nb_true_divide); |
| 3614 | COPYNUM(nb_floor_divide); |
| 3615 | COPYNUM(nb_inplace_true_divide); |
| 3616 | COPYNUM(nb_inplace_floor_divide); |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 3617 | COPYNUM(nb_index); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3618 | } |
| 3619 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3620 | if (type->tp_as_sequence != NULL && base->tp_as_sequence != NULL) { |
| 3621 | basebase = base->tp_base; |
| 3622 | if (basebase->tp_as_sequence == NULL) |
| 3623 | basebase = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3624 | COPYSEQ(sq_length); |
| 3625 | COPYSEQ(sq_concat); |
| 3626 | COPYSEQ(sq_repeat); |
| 3627 | COPYSEQ(sq_item); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3628 | COPYSEQ(sq_ass_item); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3629 | COPYSEQ(sq_contains); |
| 3630 | COPYSEQ(sq_inplace_concat); |
| 3631 | COPYSEQ(sq_inplace_repeat); |
| 3632 | } |
| 3633 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3634 | if (type->tp_as_mapping != NULL && base->tp_as_mapping != NULL) { |
| 3635 | basebase = base->tp_base; |
| 3636 | if (basebase->tp_as_mapping == NULL) |
| 3637 | basebase = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3638 | COPYMAP(mp_length); |
| 3639 | COPYMAP(mp_subscript); |
| 3640 | COPYMAP(mp_ass_subscript); |
| 3641 | } |
| 3642 | |
Tim Peters | fc57ccb | 2001-10-12 02:38:24 +0000 | [diff] [blame] | 3643 | if (type->tp_as_buffer != NULL && base->tp_as_buffer != NULL) { |
| 3644 | basebase = base->tp_base; |
| 3645 | if (basebase->tp_as_buffer == NULL) |
| 3646 | basebase = NULL; |
Travis E. Oliphant | b99f762 | 2007-08-18 11:21:56 +0000 | [diff] [blame] | 3647 | COPYBUF(bf_getbuffer); |
| 3648 | COPYBUF(bf_releasebuffer); |
Tim Peters | fc57ccb | 2001-10-12 02:38:24 +0000 | [diff] [blame] | 3649 | } |
| 3650 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3651 | basebase = base->tp_base; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3652 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3653 | COPYSLOT(tp_dealloc); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3654 | if (type->tp_getattr == NULL && type->tp_getattro == NULL) { |
| 3655 | type->tp_getattr = base->tp_getattr; |
| 3656 | type->tp_getattro = base->tp_getattro; |
| 3657 | } |
| 3658 | if (type->tp_setattr == NULL && type->tp_setattro == NULL) { |
| 3659 | type->tp_setattr = base->tp_setattr; |
| 3660 | type->tp_setattro = base->tp_setattro; |
| 3661 | } |
Mark Dickinson | e94c679 | 2009-02-02 20:36:42 +0000 | [diff] [blame] | 3662 | /* tp_reserved is ignored */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3663 | COPYSLOT(tp_repr); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3664 | /* tp_hash see tp_richcompare */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3665 | COPYSLOT(tp_call); |
| 3666 | COPYSLOT(tp_str); |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 3667 | { |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3668 | /* Copy comparison-related slots only when |
| 3669 | not overriding them anywhere */ |
Mark Dickinson | c008a17 | 2009-02-01 13:59:22 +0000 | [diff] [blame] | 3670 | if (type->tp_richcompare == NULL && |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3671 | type->tp_hash == NULL && |
Guido van Rossum | f5243f0 | 2008-01-01 04:06:48 +0000 | [diff] [blame] | 3672 | !overrides_hash(type)) |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3673 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3674 | type->tp_richcompare = base->tp_richcompare; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3675 | type->tp_hash = base->tp_hash; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3676 | } |
| 3677 | } |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 3678 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3679 | COPYSLOT(tp_iter); |
| 3680 | COPYSLOT(tp_iternext); |
| 3681 | } |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 3682 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3683 | COPYSLOT(tp_descr_get); |
| 3684 | COPYSLOT(tp_descr_set); |
| 3685 | COPYSLOT(tp_dictoffset); |
| 3686 | COPYSLOT(tp_init); |
| 3687 | COPYSLOT(tp_alloc); |
Guido van Rossum | cc8fe04 | 2002-04-05 17:10:16 +0000 | [diff] [blame] | 3688 | COPYSLOT(tp_is_gc); |
Tim Peters | 3cfe754 | 2003-05-21 21:29:48 +0000 | [diff] [blame] | 3689 | if ((type->tp_flags & Py_TPFLAGS_HAVE_GC) == |
| 3690 | (base->tp_flags & Py_TPFLAGS_HAVE_GC)) { |
| 3691 | /* They agree about gc. */ |
| 3692 | COPYSLOT(tp_free); |
| 3693 | } |
| 3694 | else if ((type->tp_flags & Py_TPFLAGS_HAVE_GC) && |
| 3695 | type->tp_free == NULL && |
Neal Norwitz | 30d1c51 | 2007-08-19 22:48:23 +0000 | [diff] [blame] | 3696 | base->tp_free == PyObject_Free) { |
Tim Peters | 3cfe754 | 2003-05-21 21:29:48 +0000 | [diff] [blame] | 3697 | /* A bit of magic to plug in the correct default |
| 3698 | * tp_free function when a derived class adds gc, |
| 3699 | * didn't define tp_free, and the base uses the |
| 3700 | * default non-gc tp_free. |
| 3701 | */ |
| 3702 | type->tp_free = PyObject_GC_Del; |
| 3703 | } |
| 3704 | /* else they didn't agree about gc, and there isn't something |
| 3705 | * obvious to be done -- the type is on its own. |
| 3706 | */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3707 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3708 | } |
| 3709 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 3710 | static int add_operators(PyTypeObject *); |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3711 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3712 | int |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 3713 | PyType_Ready(PyTypeObject *type) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3714 | { |
Guido van Rossum | 2f3ca6e | 2001-10-15 21:05:10 +0000 | [diff] [blame] | 3715 | PyObject *dict, *bases; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3716 | PyTypeObject *base; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 3717 | Py_ssize_t i, n; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3718 | |
Guido van Rossum | cab0580 | 2002-06-10 15:29:03 +0000 | [diff] [blame] | 3719 | if (type->tp_flags & Py_TPFLAGS_READY) { |
| 3720 | assert(type->tp_dict != NULL); |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3721 | return 0; |
Guido van Rossum | cab0580 | 2002-06-10 15:29:03 +0000 | [diff] [blame] | 3722 | } |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3723 | assert((type->tp_flags & Py_TPFLAGS_READYING) == 0); |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3724 | |
| 3725 | type->tp_flags |= Py_TPFLAGS_READYING; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3726 | |
Tim Peters | 36eb4df | 2003-03-23 03:33:13 +0000 | [diff] [blame] | 3727 | #ifdef Py_TRACE_REFS |
| 3728 | /* PyType_Ready is the closest thing we have to a choke point |
| 3729 | * for type objects, so is the best place I can think of to try |
| 3730 | * to get type objects into the doubly-linked list of all objects. |
| 3731 | * Still, not all type objects go thru PyType_Ready. |
| 3732 | */ |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 3733 | _Py_AddToAllObjects((PyObject *)type, 0); |
Tim Peters | 36eb4df | 2003-03-23 03:33:13 +0000 | [diff] [blame] | 3734 | #endif |
| 3735 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3736 | /* Initialize tp_base (defaults to BaseObject unless that's us) */ |
| 3737 | base = type->tp_base; |
Martin v. Löwis | bf60875 | 2004-08-18 13:16:54 +0000 | [diff] [blame] | 3738 | if (base == NULL && type != &PyBaseObject_Type) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3739 | base = type->tp_base = &PyBaseObject_Type; |
Martin v. Löwis | bf60875 | 2004-08-18 13:16:54 +0000 | [diff] [blame] | 3740 | Py_INCREF(base); |
| 3741 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3742 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3743 | /* Now the only way base can still be NULL is if type is |
| 3744 | * &PyBaseObject_Type. |
| 3745 | */ |
Guido van Rossum | 692cdbc | 2006-03-10 02:04:28 +0000 | [diff] [blame] | 3746 | |
Guido van Rossum | 323a9cf | 2002-08-14 17:26:30 +0000 | [diff] [blame] | 3747 | /* Initialize the base class */ |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 3748 | if (base != NULL && base->tp_dict == NULL) { |
Guido van Rossum | 323a9cf | 2002-08-14 17:26:30 +0000 | [diff] [blame] | 3749 | if (PyType_Ready(base) < 0) |
| 3750 | goto error; |
| 3751 | } |
| 3752 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3753 | /* Initialize ob_type if NULL. This means extensions that want to be |
Guido van Rossum | 0986d82 | 2002-04-08 01:38:42 +0000 | [diff] [blame] | 3754 | compilable separately on Windows can call PyType_Ready() instead of |
| 3755 | initializing the ob_type field of their type objects. */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3756 | /* The test for base != NULL is really unnecessary, since base is only |
| 3757 | NULL when type is &PyBaseObject_Type, and we know its ob_type is |
| 3758 | not NULL (it's initialized to &PyType_Type). But coverity doesn't |
| 3759 | know that. */ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 3760 | if (Py_TYPE(type) == NULL && base != NULL) |
| 3761 | Py_TYPE(type) = Py_TYPE(base); |
Guido van Rossum | 0986d82 | 2002-04-08 01:38:42 +0000 | [diff] [blame] | 3762 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3763 | /* Initialize tp_bases */ |
| 3764 | bases = type->tp_bases; |
| 3765 | if (bases == NULL) { |
| 3766 | if (base == NULL) |
| 3767 | bases = PyTuple_New(0); |
| 3768 | else |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 3769 | bases = PyTuple_Pack(1, base); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3770 | if (bases == NULL) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3771 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3772 | type->tp_bases = bases; |
| 3773 | } |
| 3774 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3775 | /* Initialize tp_dict */ |
| 3776 | dict = type->tp_dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3777 | if (dict == NULL) { |
| 3778 | dict = PyDict_New(); |
| 3779 | if (dict == NULL) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3780 | goto error; |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3781 | type->tp_dict = dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3782 | } |
| 3783 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3784 | /* Add type-specific descriptors to tp_dict */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3785 | if (add_operators(type) < 0) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3786 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3787 | if (type->tp_methods != NULL) { |
| 3788 | if (add_methods(type, type->tp_methods) < 0) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3789 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3790 | } |
| 3791 | if (type->tp_members != NULL) { |
| 3792 | if (add_members(type, type->tp_members) < 0) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3793 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3794 | } |
| 3795 | if (type->tp_getset != NULL) { |
| 3796 | if (add_getset(type, type->tp_getset) < 0) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3797 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3798 | } |
| 3799 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3800 | /* Calculate method resolution order */ |
| 3801 | if (mro_internal(type) < 0) { |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3802 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3803 | } |
| 3804 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3805 | /* Inherit special flags from dominant base */ |
| 3806 | if (type->tp_base != NULL) |
| 3807 | inherit_special(type, type->tp_base); |
| 3808 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3809 | /* Initialize tp_dict properly */ |
Guido van Rossum | 2f3ca6e | 2001-10-15 21:05:10 +0000 | [diff] [blame] | 3810 | bases = type->tp_mro; |
| 3811 | assert(bases != NULL); |
| 3812 | assert(PyTuple_Check(bases)); |
| 3813 | n = PyTuple_GET_SIZE(bases); |
| 3814 | for (i = 1; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 3815 | PyObject *b = PyTuple_GET_ITEM(bases, i); |
| 3816 | if (PyType_Check(b)) |
| 3817 | inherit_slots(type, (PyTypeObject *)b); |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 3818 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3819 | |
Tim Peters | 3cfe754 | 2003-05-21 21:29:48 +0000 | [diff] [blame] | 3820 | /* Sanity check for tp_free. */ |
| 3821 | if (PyType_IS_GC(type) && (type->tp_flags & Py_TPFLAGS_BASETYPE) && |
| 3822 | (type->tp_free == NULL || type->tp_free == PyObject_Del)) { |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3823 | /* This base class needs to call tp_free, but doesn't have |
| 3824 | * one, or its tp_free is for non-gc'ed objects. |
| 3825 | */ |
Tim Peters | 3cfe754 | 2003-05-21 21:29:48 +0000 | [diff] [blame] | 3826 | PyErr_Format(PyExc_TypeError, "type '%.100s' participates in " |
| 3827 | "gc and is a base type but has inappropriate " |
| 3828 | "tp_free slot", |
| 3829 | type->tp_name); |
| 3830 | goto error; |
| 3831 | } |
| 3832 | |
Martin v. Löwis | f9bd6b0 | 2002-02-18 17:46:48 +0000 | [diff] [blame] | 3833 | /* if the type dictionary doesn't contain a __doc__, set it from |
| 3834 | the tp_doc slot. |
| 3835 | */ |
| 3836 | if (PyDict_GetItemString(type->tp_dict, "__doc__") == NULL) { |
| 3837 | if (type->tp_doc != NULL) { |
Neal Norwitz | a369c5a | 2007-08-25 07:41:59 +0000 | [diff] [blame] | 3838 | PyObject *doc = PyUnicode_FromString(type->tp_doc); |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 3839 | if (doc == NULL) |
| 3840 | goto error; |
Martin v. Löwis | f9bd6b0 | 2002-02-18 17:46:48 +0000 | [diff] [blame] | 3841 | PyDict_SetItemString(type->tp_dict, "__doc__", doc); |
| 3842 | Py_DECREF(doc); |
| 3843 | } else { |
Guido van Rossum | d464107 | 2002-04-03 02:13:37 +0000 | [diff] [blame] | 3844 | PyDict_SetItemString(type->tp_dict, |
| 3845 | "__doc__", Py_None); |
Martin v. Löwis | f9bd6b0 | 2002-02-18 17:46:48 +0000 | [diff] [blame] | 3846 | } |
| 3847 | } |
| 3848 | |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3849 | /* Hack for tp_hash and __hash__. |
| 3850 | If after all that, tp_hash is still NULL, and __hash__ is not in |
Nick Coghlan | d1abd25 | 2008-07-15 15:46:38 +0000 | [diff] [blame] | 3851 | tp_dict, set tp_hash to PyObject_HashNotImplemented and |
| 3852 | tp_dict['__hash__'] equal to None. |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3853 | This signals that __hash__ is not inherited. |
| 3854 | */ |
| 3855 | if (type->tp_hash == NULL) { |
| 3856 | if (PyDict_GetItemString(type->tp_dict, "__hash__") == NULL) { |
| 3857 | if (PyDict_SetItemString(type->tp_dict, "__hash__", Py_None) < 0) |
| 3858 | goto error; |
Nick Coghlan | d1abd25 | 2008-07-15 15:46:38 +0000 | [diff] [blame] | 3859 | type->tp_hash = PyObject_HashNotImplemented; |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 3860 | } |
| 3861 | } |
| 3862 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3863 | /* Some more special stuff */ |
| 3864 | base = type->tp_base; |
| 3865 | if (base != NULL) { |
| 3866 | if (type->tp_as_number == NULL) |
| 3867 | type->tp_as_number = base->tp_as_number; |
| 3868 | if (type->tp_as_sequence == NULL) |
| 3869 | type->tp_as_sequence = base->tp_as_sequence; |
| 3870 | if (type->tp_as_mapping == NULL) |
| 3871 | type->tp_as_mapping = base->tp_as_mapping; |
Guido van Rossum | eea4718 | 2003-02-11 20:39:59 +0000 | [diff] [blame] | 3872 | if (type->tp_as_buffer == NULL) |
| 3873 | type->tp_as_buffer = base->tp_as_buffer; |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3874 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3875 | |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3876 | /* Link into each base class's list of subclasses */ |
| 3877 | bases = type->tp_bases; |
| 3878 | n = PyTuple_GET_SIZE(bases); |
| 3879 | for (i = 0; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 3880 | PyObject *b = PyTuple_GET_ITEM(bases, i); |
| 3881 | if (PyType_Check(b) && |
| 3882 | add_subclass((PyTypeObject *)b, type) < 0) |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3883 | goto error; |
| 3884 | } |
| 3885 | |
Mark Dickinson | 2a7d45b | 2009-02-08 11:02:10 +0000 | [diff] [blame] | 3886 | /* Warn for a type that implements tp_compare (now known as |
| 3887 | tp_reserved) but not tp_richcompare. */ |
| 3888 | if (type->tp_reserved && !type->tp_richcompare) { |
| 3889 | int error; |
| 3890 | char msg[240]; |
| 3891 | PyOS_snprintf(msg, sizeof(msg), |
| 3892 | "Type %.100s defines tp_reserved (formerly " |
| 3893 | "tp_compare) but not tp_richcompare. " |
| 3894 | "Comparisons may not behave as intended.", |
| 3895 | type->tp_name); |
| 3896 | error = PyErr_WarnEx(PyExc_DeprecationWarning, msg, 1); |
| 3897 | if (error == -1) |
| 3898 | goto error; |
| 3899 | } |
| 3900 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3901 | /* All done -- set the ready flag */ |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3902 | assert(type->tp_dict != NULL); |
| 3903 | type->tp_flags = |
| 3904 | (type->tp_flags & ~Py_TPFLAGS_READYING) | Py_TPFLAGS_READY; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3905 | return 0; |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3906 | |
| 3907 | error: |
| 3908 | type->tp_flags &= ~Py_TPFLAGS_READYING; |
| 3909 | return -1; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3910 | } |
| 3911 | |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3912 | static int |
| 3913 | add_subclass(PyTypeObject *base, PyTypeObject *type) |
| 3914 | { |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 3915 | Py_ssize_t i; |
| 3916 | int result; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 3917 | PyObject *list, *ref, *newobj; |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3918 | |
| 3919 | list = base->tp_subclasses; |
| 3920 | if (list == NULL) { |
| 3921 | base->tp_subclasses = list = PyList_New(0); |
| 3922 | if (list == NULL) |
| 3923 | return -1; |
| 3924 | } |
| 3925 | assert(PyList_Check(list)); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 3926 | newobj = PyWeakref_NewRef((PyObject *)type, NULL); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3927 | i = PyList_GET_SIZE(list); |
| 3928 | while (--i >= 0) { |
| 3929 | ref = PyList_GET_ITEM(list, i); |
| 3930 | assert(PyWeakref_CheckRef(ref)); |
Guido van Rossum | 3930bc3 | 2002-10-18 13:51:49 +0000 | [diff] [blame] | 3931 | if (PyWeakref_GET_OBJECT(ref) == Py_None) |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 3932 | return PyList_SetItem(list, i, newobj); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3933 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 3934 | result = PyList_Append(list, newobj); |
| 3935 | Py_DECREF(newobj); |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 3936 | return result; |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3937 | } |
| 3938 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 3939 | static void |
| 3940 | remove_subclass(PyTypeObject *base, PyTypeObject *type) |
| 3941 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 3942 | Py_ssize_t i; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 3943 | PyObject *list, *ref; |
| 3944 | |
| 3945 | list = base->tp_subclasses; |
| 3946 | if (list == NULL) { |
| 3947 | return; |
| 3948 | } |
| 3949 | assert(PyList_Check(list)); |
| 3950 | i = PyList_GET_SIZE(list); |
| 3951 | while (--i >= 0) { |
| 3952 | ref = PyList_GET_ITEM(list, i); |
| 3953 | assert(PyWeakref_CheckRef(ref)); |
| 3954 | if (PyWeakref_GET_OBJECT(ref) == (PyObject*)type) { |
| 3955 | /* this can't fail, right? */ |
| 3956 | PySequence_DelItem(list, i); |
| 3957 | return; |
| 3958 | } |
| 3959 | } |
| 3960 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3961 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3962 | static int |
| 3963 | check_num_args(PyObject *ob, int n) |
| 3964 | { |
| 3965 | if (!PyTuple_CheckExact(ob)) { |
| 3966 | PyErr_SetString(PyExc_SystemError, |
| 3967 | "PyArg_UnpackTuple() argument list is not a tuple"); |
| 3968 | return 0; |
| 3969 | } |
| 3970 | if (n == PyTuple_GET_SIZE(ob)) |
| 3971 | return 1; |
| 3972 | PyErr_Format( |
| 3973 | PyExc_TypeError, |
Martin v. Löwis | 2c95cc6 | 2006-02-16 06:54:25 +0000 | [diff] [blame] | 3974 | "expected %d arguments, got %zd", n, PyTuple_GET_SIZE(ob)); |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3975 | return 0; |
| 3976 | } |
| 3977 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3978 | /* Generic wrappers for overloadable 'operators' such as __getitem__ */ |
| 3979 | |
| 3980 | /* There's a wrapper *function* for each distinct function typedef used |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 3981 | for type object slots (e.g. binaryfunc, ternaryfunc, etc.). There's a |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3982 | wrapper *table* for each distinct operation (e.g. __len__, __add__). |
| 3983 | Most tables have only one entry; the tables for binary operators have two |
| 3984 | entries, one regular and one with reversed arguments. */ |
| 3985 | |
| 3986 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 3987 | wrap_lenfunc(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3988 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 3989 | lenfunc func = (lenfunc)wrapped; |
| 3990 | Py_ssize_t res; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3991 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3992 | if (!check_num_args(args, 0)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3993 | return NULL; |
| 3994 | res = (*func)(self); |
| 3995 | if (res == -1 && PyErr_Occurred()) |
| 3996 | return NULL; |
Christian Heimes | 217cfd1 | 2007-12-02 14:31:20 +0000 | [diff] [blame] | 3997 | return PyLong_FromLong((long)res); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3998 | } |
| 3999 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4000 | static PyObject * |
Raymond Hettinger | f34f264 | 2003-10-11 17:29:04 +0000 | [diff] [blame] | 4001 | wrap_inquirypred(PyObject *self, PyObject *args, void *wrapped) |
| 4002 | { |
| 4003 | inquiry func = (inquiry)wrapped; |
| 4004 | int res; |
| 4005 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4006 | if (!check_num_args(args, 0)) |
Raymond Hettinger | f34f264 | 2003-10-11 17:29:04 +0000 | [diff] [blame] | 4007 | return NULL; |
| 4008 | res = (*func)(self); |
| 4009 | if (res == -1 && PyErr_Occurred()) |
| 4010 | return NULL; |
| 4011 | return PyBool_FromLong((long)res); |
| 4012 | } |
| 4013 | |
| 4014 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4015 | wrap_binaryfunc(PyObject *self, PyObject *args, void *wrapped) |
| 4016 | { |
| 4017 | binaryfunc func = (binaryfunc)wrapped; |
| 4018 | PyObject *other; |
| 4019 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4020 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4021 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4022 | other = PyTuple_GET_ITEM(args, 0); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4023 | return (*func)(self, other); |
| 4024 | } |
| 4025 | |
| 4026 | static PyObject * |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 4027 | wrap_binaryfunc_l(PyObject *self, PyObject *args, void *wrapped) |
| 4028 | { |
| 4029 | binaryfunc func = (binaryfunc)wrapped; |
| 4030 | PyObject *other; |
| 4031 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4032 | if (!check_num_args(args, 1)) |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 4033 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4034 | other = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 4035 | return (*func)(self, other); |
| 4036 | } |
| 4037 | |
| 4038 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4039 | wrap_binaryfunc_r(PyObject *self, PyObject *args, void *wrapped) |
| 4040 | { |
| 4041 | binaryfunc func = (binaryfunc)wrapped; |
| 4042 | PyObject *other; |
| 4043 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4044 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4045 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4046 | other = PyTuple_GET_ITEM(args, 0); |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4047 | if (!PyType_IsSubtype(Py_TYPE(other), Py_TYPE(self))) { |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 4048 | Py_INCREF(Py_NotImplemented); |
| 4049 | return Py_NotImplemented; |
| 4050 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4051 | return (*func)(other, self); |
| 4052 | } |
| 4053 | |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 4054 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4055 | wrap_ternaryfunc(PyObject *self, PyObject *args, void *wrapped) |
| 4056 | { |
| 4057 | ternaryfunc func = (ternaryfunc)wrapped; |
| 4058 | PyObject *other; |
| 4059 | PyObject *third = Py_None; |
| 4060 | |
| 4061 | /* Note: This wrapper only works for __pow__() */ |
| 4062 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4063 | if (!PyArg_UnpackTuple(args, "", 1, 2, &other, &third)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4064 | return NULL; |
| 4065 | return (*func)(self, other, third); |
| 4066 | } |
| 4067 | |
Guido van Rossum | 9bea3ab | 2001-09-28 22:58:52 +0000 | [diff] [blame] | 4068 | static PyObject * |
| 4069 | wrap_ternaryfunc_r(PyObject *self, PyObject *args, void *wrapped) |
| 4070 | { |
| 4071 | ternaryfunc func = (ternaryfunc)wrapped; |
| 4072 | PyObject *other; |
| 4073 | PyObject *third = Py_None; |
| 4074 | |
| 4075 | /* Note: This wrapper only works for __pow__() */ |
| 4076 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4077 | if (!PyArg_UnpackTuple(args, "", 1, 2, &other, &third)) |
Guido van Rossum | 9bea3ab | 2001-09-28 22:58:52 +0000 | [diff] [blame] | 4078 | return NULL; |
| 4079 | return (*func)(other, self, third); |
| 4080 | } |
| 4081 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4082 | static PyObject * |
| 4083 | wrap_unaryfunc(PyObject *self, PyObject *args, void *wrapped) |
| 4084 | { |
| 4085 | unaryfunc func = (unaryfunc)wrapped; |
| 4086 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4087 | if (!check_num_args(args, 0)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4088 | return NULL; |
| 4089 | return (*func)(self); |
| 4090 | } |
| 4091 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4092 | static PyObject * |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 4093 | wrap_indexargfunc(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4094 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4095 | ssizeargfunc func = (ssizeargfunc)wrapped; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 4096 | PyObject* o; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4097 | Py_ssize_t i; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4098 | |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 4099 | if (!PyArg_UnpackTuple(args, "", 1, 1, &o)) |
| 4100 | return NULL; |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 4101 | i = PyNumber_AsSsize_t(o, PyExc_OverflowError); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 4102 | if (i == -1 && PyErr_Occurred()) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4103 | return NULL; |
| 4104 | return (*func)(self, i); |
| 4105 | } |
| 4106 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4107 | static Py_ssize_t |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4108 | getindex(PyObject *self, PyObject *arg) |
| 4109 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4110 | Py_ssize_t i; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4111 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 4112 | i = PyNumber_AsSsize_t(arg, PyExc_OverflowError); |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4113 | if (i == -1 && PyErr_Occurred()) |
| 4114 | return -1; |
| 4115 | if (i < 0) { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4116 | PySequenceMethods *sq = Py_TYPE(self)->tp_as_sequence; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4117 | if (sq && sq->sq_length) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4118 | Py_ssize_t n = (*sq->sq_length)(self); |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4119 | if (n < 0) |
| 4120 | return -1; |
| 4121 | i += n; |
| 4122 | } |
| 4123 | } |
| 4124 | return i; |
| 4125 | } |
| 4126 | |
| 4127 | static PyObject * |
| 4128 | wrap_sq_item(PyObject *self, PyObject *args, void *wrapped) |
| 4129 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4130 | ssizeargfunc func = (ssizeargfunc)wrapped; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4131 | PyObject *arg; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4132 | Py_ssize_t i; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4133 | |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4134 | if (PyTuple_GET_SIZE(args) == 1) { |
| 4135 | arg = PyTuple_GET_ITEM(args, 0); |
| 4136 | i = getindex(self, arg); |
| 4137 | if (i == -1 && PyErr_Occurred()) |
| 4138 | return NULL; |
| 4139 | return (*func)(self, i); |
| 4140 | } |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4141 | check_num_args(args, 1); |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4142 | assert(PyErr_Occurred()); |
| 4143 | return NULL; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4144 | } |
| 4145 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4146 | static PyObject * |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4147 | wrap_sq_setitem(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4148 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4149 | ssizeobjargproc func = (ssizeobjargproc)wrapped; |
| 4150 | Py_ssize_t i; |
| 4151 | int res; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4152 | PyObject *arg, *value; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4153 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4154 | if (!PyArg_UnpackTuple(args, "", 2, 2, &arg, &value)) |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4155 | return NULL; |
| 4156 | i = getindex(self, arg); |
| 4157 | if (i == -1 && PyErr_Occurred()) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4158 | return NULL; |
| 4159 | res = (*func)(self, i, value); |
| 4160 | if (res == -1 && PyErr_Occurred()) |
| 4161 | return NULL; |
| 4162 | Py_INCREF(Py_None); |
| 4163 | return Py_None; |
| 4164 | } |
| 4165 | |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4166 | static PyObject * |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4167 | wrap_sq_delitem(PyObject *self, PyObject *args, void *wrapped) |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4168 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4169 | ssizeobjargproc func = (ssizeobjargproc)wrapped; |
| 4170 | Py_ssize_t i; |
| 4171 | int res; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4172 | PyObject *arg; |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4173 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4174 | if (!check_num_args(args, 1)) |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4175 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4176 | arg = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4177 | i = getindex(self, arg); |
| 4178 | if (i == -1 && PyErr_Occurred()) |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4179 | return NULL; |
| 4180 | res = (*func)(self, i, NULL); |
| 4181 | if (res == -1 && PyErr_Occurred()) |
| 4182 | return NULL; |
| 4183 | Py_INCREF(Py_None); |
| 4184 | return Py_None; |
| 4185 | } |
| 4186 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4187 | /* XXX objobjproc is a misnomer; should be objargpred */ |
| 4188 | static PyObject * |
| 4189 | wrap_objobjproc(PyObject *self, PyObject *args, void *wrapped) |
| 4190 | { |
| 4191 | objobjproc func = (objobjproc)wrapped; |
| 4192 | int res; |
Guido van Rossum | 22c3dda | 2003-10-09 03:46:35 +0000 | [diff] [blame] | 4193 | PyObject *value; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4194 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4195 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4196 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4197 | value = PyTuple_GET_ITEM(args, 0); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4198 | res = (*func)(self, value); |
| 4199 | if (res == -1 && PyErr_Occurred()) |
| 4200 | return NULL; |
Guido van Rossum | 22c3dda | 2003-10-09 03:46:35 +0000 | [diff] [blame] | 4201 | else |
| 4202 | return PyBool_FromLong(res); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4203 | } |
| 4204 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4205 | static PyObject * |
| 4206 | wrap_objobjargproc(PyObject *self, PyObject *args, void *wrapped) |
| 4207 | { |
| 4208 | objobjargproc func = (objobjargproc)wrapped; |
| 4209 | int res; |
| 4210 | PyObject *key, *value; |
| 4211 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4212 | if (!PyArg_UnpackTuple(args, "", 2, 2, &key, &value)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4213 | return NULL; |
| 4214 | res = (*func)(self, key, value); |
| 4215 | if (res == -1 && PyErr_Occurred()) |
| 4216 | return NULL; |
| 4217 | Py_INCREF(Py_None); |
| 4218 | return Py_None; |
| 4219 | } |
| 4220 | |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4221 | static PyObject * |
| 4222 | wrap_delitem(PyObject *self, PyObject *args, void *wrapped) |
| 4223 | { |
| 4224 | objobjargproc func = (objobjargproc)wrapped; |
| 4225 | int res; |
| 4226 | PyObject *key; |
| 4227 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4228 | if (!check_num_args(args, 1)) |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4229 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4230 | key = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4231 | res = (*func)(self, key, NULL); |
| 4232 | if (res == -1 && PyErr_Occurred()) |
| 4233 | return NULL; |
| 4234 | Py_INCREF(Py_None); |
| 4235 | return Py_None; |
| 4236 | } |
| 4237 | |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4238 | /* Helper to check for object.__setattr__ or __delattr__ applied to a type. |
Guido van Rossum | 52b2705 | 2003-04-15 20:05:10 +0000 | [diff] [blame] | 4239 | This is called the Carlo Verre hack after its discoverer. */ |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4240 | static int |
| 4241 | hackcheck(PyObject *self, setattrofunc func, char *what) |
| 4242 | { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4243 | PyTypeObject *type = Py_TYPE(self); |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4244 | while (type && type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
| 4245 | type = type->tp_base; |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 4246 | /* If type is NULL now, this is a really weird type. |
| 4247 | In the spirit of backwards compatibility (?), just shut up. */ |
Guido van Rossum | 692cdbc | 2006-03-10 02:04:28 +0000 | [diff] [blame] | 4248 | if (type && type->tp_setattro != func) { |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4249 | PyErr_Format(PyExc_TypeError, |
| 4250 | "can't apply this %s to %s object", |
| 4251 | what, |
| 4252 | type->tp_name); |
| 4253 | return 0; |
| 4254 | } |
| 4255 | return 1; |
| 4256 | } |
| 4257 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4258 | static PyObject * |
| 4259 | wrap_setattr(PyObject *self, PyObject *args, void *wrapped) |
| 4260 | { |
| 4261 | setattrofunc func = (setattrofunc)wrapped; |
| 4262 | int res; |
| 4263 | PyObject *name, *value; |
| 4264 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4265 | if (!PyArg_UnpackTuple(args, "", 2, 2, &name, &value)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4266 | return NULL; |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4267 | if (!hackcheck(self, func, "__setattr__")) |
| 4268 | return NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4269 | res = (*func)(self, name, value); |
| 4270 | if (res < 0) |
| 4271 | return NULL; |
| 4272 | Py_INCREF(Py_None); |
| 4273 | return Py_None; |
| 4274 | } |
| 4275 | |
| 4276 | static PyObject * |
| 4277 | wrap_delattr(PyObject *self, PyObject *args, void *wrapped) |
| 4278 | { |
| 4279 | setattrofunc func = (setattrofunc)wrapped; |
| 4280 | int res; |
| 4281 | PyObject *name; |
| 4282 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4283 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4284 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4285 | name = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4286 | if (!hackcheck(self, func, "__delattr__")) |
| 4287 | return NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4288 | res = (*func)(self, name, NULL); |
| 4289 | if (res < 0) |
| 4290 | return NULL; |
| 4291 | Py_INCREF(Py_None); |
| 4292 | return Py_None; |
| 4293 | } |
| 4294 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4295 | static PyObject * |
| 4296 | wrap_hashfunc(PyObject *self, PyObject *args, void *wrapped) |
| 4297 | { |
| 4298 | hashfunc func = (hashfunc)wrapped; |
| 4299 | long res; |
| 4300 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4301 | if (!check_num_args(args, 0)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4302 | return NULL; |
| 4303 | res = (*func)(self); |
| 4304 | if (res == -1 && PyErr_Occurred()) |
| 4305 | return NULL; |
Christian Heimes | 217cfd1 | 2007-12-02 14:31:20 +0000 | [diff] [blame] | 4306 | return PyLong_FromLong(res); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4307 | } |
| 4308 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4309 | static PyObject * |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 4310 | wrap_call(PyObject *self, PyObject *args, void *wrapped, PyObject *kwds) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4311 | { |
| 4312 | ternaryfunc func = (ternaryfunc)wrapped; |
| 4313 | |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 4314 | return (*func)(self, args, kwds); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4315 | } |
| 4316 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4317 | static PyObject * |
| 4318 | wrap_richcmpfunc(PyObject *self, PyObject *args, void *wrapped, int op) |
| 4319 | { |
| 4320 | richcmpfunc func = (richcmpfunc)wrapped; |
| 4321 | PyObject *other; |
| 4322 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4323 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4324 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4325 | other = PyTuple_GET_ITEM(args, 0); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4326 | return (*func)(self, other, op); |
| 4327 | } |
| 4328 | |
| 4329 | #undef RICHCMP_WRAPPER |
| 4330 | #define RICHCMP_WRAPPER(NAME, OP) \ |
| 4331 | static PyObject * \ |
| 4332 | richcmp_##NAME(PyObject *self, PyObject *args, void *wrapped) \ |
| 4333 | { \ |
| 4334 | return wrap_richcmpfunc(self, args, wrapped, OP); \ |
| 4335 | } |
| 4336 | |
Jack Jansen | 8e938b4 | 2001-08-08 15:29:49 +0000 | [diff] [blame] | 4337 | RICHCMP_WRAPPER(lt, Py_LT) |
| 4338 | RICHCMP_WRAPPER(le, Py_LE) |
| 4339 | RICHCMP_WRAPPER(eq, Py_EQ) |
| 4340 | RICHCMP_WRAPPER(ne, Py_NE) |
| 4341 | RICHCMP_WRAPPER(gt, Py_GT) |
| 4342 | RICHCMP_WRAPPER(ge, Py_GE) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4343 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4344 | static PyObject * |
| 4345 | wrap_next(PyObject *self, PyObject *args, void *wrapped) |
| 4346 | { |
| 4347 | unaryfunc func = (unaryfunc)wrapped; |
| 4348 | PyObject *res; |
| 4349 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4350 | if (!check_num_args(args, 0)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4351 | return NULL; |
| 4352 | res = (*func)(self); |
| 4353 | if (res == NULL && !PyErr_Occurred()) |
| 4354 | PyErr_SetNone(PyExc_StopIteration); |
| 4355 | return res; |
| 4356 | } |
| 4357 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4358 | static PyObject * |
| 4359 | wrap_descr_get(PyObject *self, PyObject *args, void *wrapped) |
| 4360 | { |
| 4361 | descrgetfunc func = (descrgetfunc)wrapped; |
| 4362 | PyObject *obj; |
| 4363 | PyObject *type = NULL; |
| 4364 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4365 | if (!PyArg_UnpackTuple(args, "", 1, 2, &obj, &type)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4366 | return NULL; |
Guido van Rossum | 82ed25c | 2003-02-11 16:25:43 +0000 | [diff] [blame] | 4367 | if (obj == Py_None) |
| 4368 | obj = NULL; |
| 4369 | if (type == Py_None) |
| 4370 | type = NULL; |
| 4371 | if (type == NULL &&obj == NULL) { |
| 4372 | PyErr_SetString(PyExc_TypeError, |
| 4373 | "__get__(None, None) is invalid"); |
| 4374 | return NULL; |
| 4375 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4376 | return (*func)(self, obj, type); |
| 4377 | } |
| 4378 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4379 | static PyObject * |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 4380 | wrap_descr_set(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4381 | { |
| 4382 | descrsetfunc func = (descrsetfunc)wrapped; |
| 4383 | PyObject *obj, *value; |
| 4384 | int ret; |
| 4385 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4386 | if (!PyArg_UnpackTuple(args, "", 2, 2, &obj, &value)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4387 | return NULL; |
| 4388 | ret = (*func)(self, obj, value); |
| 4389 | if (ret < 0) |
| 4390 | return NULL; |
| 4391 | Py_INCREF(Py_None); |
| 4392 | return Py_None; |
| 4393 | } |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 4394 | |
Guido van Rossum | 0dbab4c5 | 2002-08-01 14:39:25 +0000 | [diff] [blame] | 4395 | static PyObject * |
| 4396 | wrap_descr_delete(PyObject *self, PyObject *args, void *wrapped) |
| 4397 | { |
| 4398 | descrsetfunc func = (descrsetfunc)wrapped; |
| 4399 | PyObject *obj; |
| 4400 | int ret; |
| 4401 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4402 | if (!check_num_args(args, 1)) |
Guido van Rossum | 0dbab4c5 | 2002-08-01 14:39:25 +0000 | [diff] [blame] | 4403 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4404 | obj = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 0dbab4c5 | 2002-08-01 14:39:25 +0000 | [diff] [blame] | 4405 | ret = (*func)(self, obj, NULL); |
| 4406 | if (ret < 0) |
| 4407 | return NULL; |
| 4408 | Py_INCREF(Py_None); |
| 4409 | return Py_None; |
| 4410 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4411 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4412 | static PyObject * |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 4413 | wrap_init(PyObject *self, PyObject *args, void *wrapped, PyObject *kwds) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4414 | { |
| 4415 | initproc func = (initproc)wrapped; |
| 4416 | |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 4417 | if (func(self, args, kwds) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4418 | return NULL; |
| 4419 | Py_INCREF(Py_None); |
| 4420 | return Py_None; |
| 4421 | } |
| 4422 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4423 | static PyObject * |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4424 | tp_new_wrapper(PyObject *self, PyObject *args, PyObject *kwds) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4425 | { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4426 | PyTypeObject *type, *subtype, *staticbase; |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4427 | PyObject *arg0, *res; |
| 4428 | |
| 4429 | if (self == NULL || !PyType_Check(self)) |
| 4430 | Py_FatalError("__new__() called with non-type 'self'"); |
| 4431 | type = (PyTypeObject *)self; |
| 4432 | if (!PyTuple_Check(args) || PyTuple_GET_SIZE(args) < 1) { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4433 | PyErr_Format(PyExc_TypeError, |
| 4434 | "%s.__new__(): not enough arguments", |
| 4435 | type->tp_name); |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4436 | return NULL; |
| 4437 | } |
| 4438 | arg0 = PyTuple_GET_ITEM(args, 0); |
| 4439 | if (!PyType_Check(arg0)) { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4440 | PyErr_Format(PyExc_TypeError, |
| 4441 | "%s.__new__(X): X is not a type object (%s)", |
| 4442 | type->tp_name, |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4443 | Py_TYPE(arg0)->tp_name); |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4444 | return NULL; |
| 4445 | } |
| 4446 | subtype = (PyTypeObject *)arg0; |
| 4447 | if (!PyType_IsSubtype(subtype, type)) { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4448 | PyErr_Format(PyExc_TypeError, |
| 4449 | "%s.__new__(%s): %s is not a subtype of %s", |
| 4450 | type->tp_name, |
| 4451 | subtype->tp_name, |
| 4452 | subtype->tp_name, |
| 4453 | type->tp_name); |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4454 | return NULL; |
| 4455 | } |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4456 | |
| 4457 | /* Check that the use doesn't do something silly and unsafe like |
Tim Peters | a427a2b | 2001-10-29 22:25:45 +0000 | [diff] [blame] | 4458 | object.__new__(dict). To do this, we check that the |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4459 | most derived base that's not a heap type is this type. */ |
| 4460 | staticbase = subtype; |
| 4461 | while (staticbase && (staticbase->tp_flags & Py_TPFLAGS_HEAPTYPE)) |
| 4462 | staticbase = staticbase->tp_base; |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 4463 | /* If staticbase is NULL now, it is a really weird type. |
| 4464 | In the spirit of backwards compatibility (?), just shut up. */ |
Guido van Rossum | 692cdbc | 2006-03-10 02:04:28 +0000 | [diff] [blame] | 4465 | if (staticbase && staticbase->tp_new != type->tp_new) { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4466 | PyErr_Format(PyExc_TypeError, |
| 4467 | "%s.__new__(%s) is not safe, use %s.__new__()", |
| 4468 | type->tp_name, |
| 4469 | subtype->tp_name, |
| 4470 | staticbase == NULL ? "?" : staticbase->tp_name); |
| 4471 | return NULL; |
| 4472 | } |
| 4473 | |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4474 | args = PyTuple_GetSlice(args, 1, PyTuple_GET_SIZE(args)); |
| 4475 | if (args == NULL) |
| 4476 | return NULL; |
| 4477 | res = type->tp_new(subtype, args, kwds); |
| 4478 | Py_DECREF(args); |
| 4479 | return res; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4480 | } |
| 4481 | |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4482 | static struct PyMethodDef tp_new_methoddef[] = { |
Guido van Rossum | d59da4b | 2007-05-22 18:11:13 +0000 | [diff] [blame] | 4483 | {"__new__", (PyCFunction)tp_new_wrapper, METH_VARARGS|METH_KEYWORDS, |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 4484 | PyDoc_STR("T.__new__(S, ...) -> " |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 4485 | "a new object with type S, a subtype of T")}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4486 | {0} |
| 4487 | }; |
| 4488 | |
| 4489 | static int |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4490 | add_tp_new_wrapper(PyTypeObject *type) |
| 4491 | { |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 4492 | PyObject *func; |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4493 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 4494 | if (PyDict_GetItemString(type->tp_dict, "__new__") != NULL) |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 4495 | return 0; |
| 4496 | func = PyCFunction_New(tp_new_methoddef, (PyObject *)type); |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4497 | if (func == NULL) |
| 4498 | return -1; |
Raymond Hettinger | 8d726ee | 2004-06-25 22:24:35 +0000 | [diff] [blame] | 4499 | if (PyDict_SetItemString(type->tp_dict, "__new__", func)) { |
Raymond Hettinger | d56cbe5 | 2004-06-25 22:17:39 +0000 | [diff] [blame] | 4500 | Py_DECREF(func); |
| 4501 | return -1; |
| 4502 | } |
| 4503 | Py_DECREF(func); |
| 4504 | return 0; |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4505 | } |
| 4506 | |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 4507 | /* Slot wrappers that call the corresponding __foo__ slot. See comments |
| 4508 | below at override_slots() for more explanation. */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4509 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4510 | #define SLOT0(FUNCNAME, OPSTR) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4511 | static PyObject * \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4512 | FUNCNAME(PyObject *self) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4513 | { \ |
Guido van Rossum | 5592e4d | 2001-08-28 18:28:21 +0000 | [diff] [blame] | 4514 | static PyObject *cache_str; \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4515 | return call_method(self, OPSTR, &cache_str, "()"); \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4516 | } |
| 4517 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4518 | #define SLOT1(FUNCNAME, OPSTR, ARG1TYPE, ARGCODES) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4519 | static PyObject * \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4520 | FUNCNAME(PyObject *self, ARG1TYPE arg1) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4521 | { \ |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4522 | static PyObject *cache_str; \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4523 | return call_method(self, OPSTR, &cache_str, "(" ARGCODES ")", arg1); \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4524 | } |
| 4525 | |
Guido van Rossum | cd11880 | 2003-01-06 22:57:47 +0000 | [diff] [blame] | 4526 | /* Boolean helper for SLOT1BINFULL(). |
| 4527 | right.__class__ is a nontrivial subclass of left.__class__. */ |
| 4528 | static int |
| 4529 | method_is_overloaded(PyObject *left, PyObject *right, char *name) |
| 4530 | { |
| 4531 | PyObject *a, *b; |
| 4532 | int ok; |
| 4533 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4534 | b = PyObject_GetAttrString((PyObject *)(Py_TYPE(right)), name); |
Guido van Rossum | cd11880 | 2003-01-06 22:57:47 +0000 | [diff] [blame] | 4535 | if (b == NULL) { |
| 4536 | PyErr_Clear(); |
| 4537 | /* If right doesn't have it, it's not overloaded */ |
| 4538 | return 0; |
| 4539 | } |
| 4540 | |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4541 | a = PyObject_GetAttrString((PyObject *)(Py_TYPE(left)), name); |
Guido van Rossum | cd11880 | 2003-01-06 22:57:47 +0000 | [diff] [blame] | 4542 | if (a == NULL) { |
| 4543 | PyErr_Clear(); |
| 4544 | Py_DECREF(b); |
| 4545 | /* If right has it but left doesn't, it's overloaded */ |
| 4546 | return 1; |
| 4547 | } |
| 4548 | |
| 4549 | ok = PyObject_RichCompareBool(a, b, Py_NE); |
| 4550 | Py_DECREF(a); |
| 4551 | Py_DECREF(b); |
| 4552 | if (ok < 0) { |
| 4553 | PyErr_Clear(); |
| 4554 | return 0; |
| 4555 | } |
| 4556 | |
| 4557 | return ok; |
| 4558 | } |
| 4559 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4560 | |
| 4561 | #define SLOT1BINFULL(FUNCNAME, TESTFUNC, SLOTNAME, OPSTR, ROPSTR) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4562 | static PyObject * \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4563 | FUNCNAME(PyObject *self, PyObject *other) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4564 | { \ |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4565 | static PyObject *cache_str, *rcache_str; \ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4566 | int do_other = Py_TYPE(self) != Py_TYPE(other) && \ |
| 4567 | Py_TYPE(other)->tp_as_number != NULL && \ |
| 4568 | Py_TYPE(other)->tp_as_number->SLOTNAME == TESTFUNC; \ |
| 4569 | if (Py_TYPE(self)->tp_as_number != NULL && \ |
| 4570 | Py_TYPE(self)->tp_as_number->SLOTNAME == TESTFUNC) { \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4571 | PyObject *r; \ |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4572 | if (do_other && \ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4573 | PyType_IsSubtype(Py_TYPE(other), Py_TYPE(self)) && \ |
Guido van Rossum | cd11880 | 2003-01-06 22:57:47 +0000 | [diff] [blame] | 4574 | method_is_overloaded(self, other, ROPSTR)) { \ |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4575 | r = call_maybe( \ |
| 4576 | other, ROPSTR, &rcache_str, "(O)", self); \ |
| 4577 | if (r != Py_NotImplemented) \ |
| 4578 | return r; \ |
| 4579 | Py_DECREF(r); \ |
| 4580 | do_other = 0; \ |
| 4581 | } \ |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 4582 | r = call_maybe( \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4583 | self, OPSTR, &cache_str, "(O)", other); \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4584 | if (r != Py_NotImplemented || \ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4585 | Py_TYPE(other) == Py_TYPE(self)) \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4586 | return r; \ |
| 4587 | Py_DECREF(r); \ |
| 4588 | } \ |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4589 | if (do_other) { \ |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 4590 | return call_maybe( \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4591 | other, ROPSTR, &rcache_str, "(O)", self); \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4592 | } \ |
| 4593 | Py_INCREF(Py_NotImplemented); \ |
| 4594 | return Py_NotImplemented; \ |
| 4595 | } |
| 4596 | |
| 4597 | #define SLOT1BIN(FUNCNAME, SLOTNAME, OPSTR, ROPSTR) \ |
| 4598 | SLOT1BINFULL(FUNCNAME, FUNCNAME, SLOTNAME, OPSTR, ROPSTR) |
| 4599 | |
| 4600 | #define SLOT2(FUNCNAME, OPSTR, ARG1TYPE, ARG2TYPE, ARGCODES) \ |
| 4601 | static PyObject * \ |
| 4602 | FUNCNAME(PyObject *self, ARG1TYPE arg1, ARG2TYPE arg2) \ |
| 4603 | { \ |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4604 | static PyObject *cache_str; \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4605 | return call_method(self, OPSTR, &cache_str, \ |
| 4606 | "(" ARGCODES ")", arg1, arg2); \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4607 | } |
| 4608 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4609 | static Py_ssize_t |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4610 | slot_sq_length(PyObject *self) |
| 4611 | { |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4612 | static PyObject *len_str; |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4613 | PyObject *res = call_method(self, "__len__", &len_str, "()"); |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4614 | Py_ssize_t len; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4615 | |
| 4616 | if (res == NULL) |
| 4617 | return -1; |
Benjamin Peterson | ee1ae7c | 2009-02-08 21:07:20 +0000 | [diff] [blame] | 4618 | len = PyNumber_AsSsize_t(res, PyExc_OverflowError); |
Guido van Rossum | 2611162 | 2001-10-01 16:42:49 +0000 | [diff] [blame] | 4619 | Py_DECREF(res); |
Jeremy Hylton | f20fcf9 | 2002-07-25 16:06:15 +0000 | [diff] [blame] | 4620 | if (len < 0) { |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 4621 | if (!PyErr_Occurred()) |
| 4622 | PyErr_SetString(PyExc_ValueError, |
| 4623 | "__len__() should return >= 0"); |
Jeremy Hylton | f20fcf9 | 2002-07-25 16:06:15 +0000 | [diff] [blame] | 4624 | return -1; |
| 4625 | } |
Guido van Rossum | 2611162 | 2001-10-01 16:42:49 +0000 | [diff] [blame] | 4626 | return len; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4627 | } |
| 4628 | |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4629 | /* Super-optimized version of slot_sq_item. |
| 4630 | Other slots could do the same... */ |
| 4631 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4632 | slot_sq_item(PyObject *self, Py_ssize_t i) |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4633 | { |
| 4634 | static PyObject *getitem_str; |
| 4635 | PyObject *func, *args = NULL, *ival = NULL, *retval = NULL; |
| 4636 | descrgetfunc f; |
| 4637 | |
| 4638 | if (getitem_str == NULL) { |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 4639 | getitem_str = PyUnicode_InternFromString("__getitem__"); |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4640 | if (getitem_str == NULL) |
| 4641 | return NULL; |
| 4642 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4643 | func = _PyType_Lookup(Py_TYPE(self), getitem_str); |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4644 | if (func != NULL) { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4645 | if ((f = Py_TYPE(func)->tp_descr_get) == NULL) |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4646 | Py_INCREF(func); |
Neal Norwitz | 673cd82 | 2002-10-18 16:33:13 +0000 | [diff] [blame] | 4647 | else { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4648 | func = f(func, self, (PyObject *)(Py_TYPE(self))); |
Neal Norwitz | 673cd82 | 2002-10-18 16:33:13 +0000 | [diff] [blame] | 4649 | if (func == NULL) { |
| 4650 | return NULL; |
| 4651 | } |
| 4652 | } |
Christian Heimes | 217cfd1 | 2007-12-02 14:31:20 +0000 | [diff] [blame] | 4653 | ival = PyLong_FromSsize_t(i); |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4654 | if (ival != NULL) { |
| 4655 | args = PyTuple_New(1); |
| 4656 | if (args != NULL) { |
| 4657 | PyTuple_SET_ITEM(args, 0, ival); |
| 4658 | retval = PyObject_Call(func, args, NULL); |
| 4659 | Py_XDECREF(args); |
| 4660 | Py_XDECREF(func); |
| 4661 | return retval; |
| 4662 | } |
| 4663 | } |
| 4664 | } |
| 4665 | else { |
| 4666 | PyErr_SetObject(PyExc_AttributeError, getitem_str); |
| 4667 | } |
| 4668 | Py_XDECREF(args); |
| 4669 | Py_XDECREF(ival); |
| 4670 | Py_XDECREF(func); |
| 4671 | return NULL; |
| 4672 | } |
| 4673 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4674 | static int |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4675 | slot_sq_ass_item(PyObject *self, Py_ssize_t index, PyObject *value) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4676 | { |
| 4677 | PyObject *res; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4678 | static PyObject *delitem_str, *setitem_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4679 | |
| 4680 | if (value == NULL) |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4681 | res = call_method(self, "__delitem__", &delitem_str, |
Thomas Wouters | 3fc2ca3 | 2006-04-21 11:28:17 +0000 | [diff] [blame] | 4682 | "(n)", index); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4683 | else |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4684 | res = call_method(self, "__setitem__", &setitem_str, |
Thomas Wouters | 3fc2ca3 | 2006-04-21 11:28:17 +0000 | [diff] [blame] | 4685 | "(nO)", index, value); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4686 | if (res == NULL) |
| 4687 | return -1; |
| 4688 | Py_DECREF(res); |
| 4689 | return 0; |
| 4690 | } |
| 4691 | |
| 4692 | static int |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4693 | slot_sq_contains(PyObject *self, PyObject *value) |
| 4694 | { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4695 | PyObject *func, *res, *args; |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4696 | int result = -1; |
| 4697 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4698 | static PyObject *contains_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4699 | |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4700 | func = lookup_maybe(self, "__contains__", &contains_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4701 | if (func != NULL) { |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 4702 | args = PyTuple_Pack(1, value); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4703 | if (args == NULL) |
| 4704 | res = NULL; |
| 4705 | else { |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4706 | res = PyObject_Call(func, args, NULL); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4707 | Py_DECREF(args); |
| 4708 | } |
| 4709 | Py_DECREF(func); |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4710 | if (res != NULL) { |
| 4711 | result = PyObject_IsTrue(res); |
| 4712 | Py_DECREF(res); |
| 4713 | } |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4714 | } |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4715 | else if (! PyErr_Occurred()) { |
Martin v. Löwis | 725507b | 2006-03-07 12:08:51 +0000 | [diff] [blame] | 4716 | /* Possible results: -1 and 1 */ |
| 4717 | result = (int)_PySequence_IterSearch(self, value, |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4718 | PY_ITERSEARCH_CONTAINS); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4719 | } |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4720 | return result; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4721 | } |
| 4722 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4723 | #define slot_mp_length slot_sq_length |
| 4724 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4725 | SLOT1(slot_mp_subscript, "__getitem__", PyObject *, "O") |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4726 | |
| 4727 | static int |
| 4728 | slot_mp_ass_subscript(PyObject *self, PyObject *key, PyObject *value) |
| 4729 | { |
| 4730 | PyObject *res; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4731 | static PyObject *delitem_str, *setitem_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4732 | |
| 4733 | if (value == NULL) |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4734 | res = call_method(self, "__delitem__", &delitem_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4735 | "(O)", key); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4736 | else |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4737 | res = call_method(self, "__setitem__", &setitem_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4738 | "(OO)", key, value); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4739 | if (res == NULL) |
| 4740 | return -1; |
| 4741 | Py_DECREF(res); |
| 4742 | return 0; |
| 4743 | } |
| 4744 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4745 | SLOT1BIN(slot_nb_add, nb_add, "__add__", "__radd__") |
| 4746 | SLOT1BIN(slot_nb_subtract, nb_subtract, "__sub__", "__rsub__") |
| 4747 | SLOT1BIN(slot_nb_multiply, nb_multiply, "__mul__", "__rmul__") |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4748 | SLOT1BIN(slot_nb_remainder, nb_remainder, "__mod__", "__rmod__") |
| 4749 | SLOT1BIN(slot_nb_divmod, nb_divmod, "__divmod__", "__rdivmod__") |
| 4750 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 4751 | static PyObject *slot_nb_power(PyObject *, PyObject *, PyObject *); |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4752 | |
| 4753 | SLOT1BINFULL(slot_nb_power_binary, slot_nb_power, |
| 4754 | nb_power, "__pow__", "__rpow__") |
| 4755 | |
| 4756 | static PyObject * |
| 4757 | slot_nb_power(PyObject *self, PyObject *other, PyObject *modulus) |
| 4758 | { |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4759 | static PyObject *pow_str; |
| 4760 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4761 | if (modulus == Py_None) |
| 4762 | return slot_nb_power_binary(self, other); |
Guido van Rossum | 2309498 | 2002-06-10 14:30:43 +0000 | [diff] [blame] | 4763 | /* Three-arg power doesn't use __rpow__. But ternary_op |
| 4764 | can call this when the second argument's type uses |
| 4765 | slot_nb_power, so check before calling self.__pow__. */ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4766 | if (Py_TYPE(self)->tp_as_number != NULL && |
| 4767 | Py_TYPE(self)->tp_as_number->nb_power == slot_nb_power) { |
Guido van Rossum | 2309498 | 2002-06-10 14:30:43 +0000 | [diff] [blame] | 4768 | return call_method(self, "__pow__", &pow_str, |
| 4769 | "(OO)", other, modulus); |
| 4770 | } |
| 4771 | Py_INCREF(Py_NotImplemented); |
| 4772 | return Py_NotImplemented; |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4773 | } |
| 4774 | |
| 4775 | SLOT0(slot_nb_negative, "__neg__") |
| 4776 | SLOT0(slot_nb_positive, "__pos__") |
| 4777 | SLOT0(slot_nb_absolute, "__abs__") |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4778 | |
| 4779 | static int |
Jack Diederich | 4dafcc4 | 2006-11-28 19:15:13 +0000 | [diff] [blame] | 4780 | slot_nb_bool(PyObject *self) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4781 | { |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4782 | PyObject *func, *args; |
Jack Diederich | 4dafcc4 | 2006-11-28 19:15:13 +0000 | [diff] [blame] | 4783 | static PyObject *bool_str, *len_str; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4784 | int result = -1; |
Benjamin Peterson | f07d002 | 2009-03-21 17:31:58 +0000 | [diff] [blame] | 4785 | int using_len = 0; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4786 | |
Jack Diederich | 4dafcc4 | 2006-11-28 19:15:13 +0000 | [diff] [blame] | 4787 | func = lookup_maybe(self, "__bool__", &bool_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4788 | if (func == NULL) { |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4789 | if (PyErr_Occurred()) |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4790 | return -1; |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4791 | func = lookup_maybe(self, "__len__", &len_str); |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4792 | if (func == NULL) |
| 4793 | return PyErr_Occurred() ? -1 : 1; |
Benjamin Peterson | f07d002 | 2009-03-21 17:31:58 +0000 | [diff] [blame] | 4794 | using_len = 1; |
| 4795 | } |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4796 | args = PyTuple_New(0); |
| 4797 | if (args != NULL) { |
| 4798 | PyObject *temp = PyObject_Call(func, args, NULL); |
| 4799 | Py_DECREF(args); |
| 4800 | if (temp != NULL) { |
Benjamin Peterson | f07d002 | 2009-03-21 17:31:58 +0000 | [diff] [blame] | 4801 | if (using_len) { |
Jack Diederich | 4dafcc4 | 2006-11-28 19:15:13 +0000 | [diff] [blame] | 4802 | /* enforced by slot_nb_len */ |
Jeremy Hylton | 090a349 | 2003-06-27 16:46:45 +0000 | [diff] [blame] | 4803 | result = PyObject_IsTrue(temp); |
Jack Diederich | 4dafcc4 | 2006-11-28 19:15:13 +0000 | [diff] [blame] | 4804 | } |
| 4805 | else if (PyBool_Check(temp)) { |
| 4806 | result = PyObject_IsTrue(temp); |
| 4807 | } |
Jeremy Hylton | 090a349 | 2003-06-27 16:46:45 +0000 | [diff] [blame] | 4808 | else { |
| 4809 | PyErr_Format(PyExc_TypeError, |
Amaury Forgeot d'Arc | 097cd07 | 2009-07-07 00:43:08 +0000 | [diff] [blame] | 4810 | "__bool__ should return " |
| 4811 | "bool, returned %s", |
Benjamin Peterson | f07d002 | 2009-03-21 17:31:58 +0000 | [diff] [blame] | 4812 | Py_TYPE(temp)->tp_name); |
Jeremy Hylton | 3e3159c | 2003-06-27 17:38:27 +0000 | [diff] [blame] | 4813 | result = -1; |
Jeremy Hylton | 090a349 | 2003-06-27 16:46:45 +0000 | [diff] [blame] | 4814 | } |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4815 | Py_DECREF(temp); |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4816 | } |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4817 | } |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4818 | Py_DECREF(func); |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4819 | return result; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4820 | } |
| 4821 | |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 4822 | |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 4823 | static PyObject * |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 4824 | slot_nb_index(PyObject *self) |
| 4825 | { |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 4826 | static PyObject *index_str; |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 4827 | return call_method(self, "__index__", &index_str, "()"); |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 4828 | } |
| 4829 | |
| 4830 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4831 | SLOT0(slot_nb_invert, "__invert__") |
| 4832 | SLOT1BIN(slot_nb_lshift, nb_lshift, "__lshift__", "__rlshift__") |
| 4833 | SLOT1BIN(slot_nb_rshift, nb_rshift, "__rshift__", "__rrshift__") |
| 4834 | SLOT1BIN(slot_nb_and, nb_and, "__and__", "__rand__") |
| 4835 | SLOT1BIN(slot_nb_xor, nb_xor, "__xor__", "__rxor__") |
| 4836 | SLOT1BIN(slot_nb_or, nb_or, "__or__", "__ror__") |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 4837 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4838 | SLOT0(slot_nb_int, "__int__") |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4839 | SLOT0(slot_nb_float, "__float__") |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4840 | SLOT1(slot_nb_inplace_add, "__iadd__", PyObject *, "O") |
| 4841 | SLOT1(slot_nb_inplace_subtract, "__isub__", PyObject *, "O") |
| 4842 | SLOT1(slot_nb_inplace_multiply, "__imul__", PyObject *, "O") |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4843 | SLOT1(slot_nb_inplace_remainder, "__imod__", PyObject *, "O") |
Thomas Wouters | cf297e4 | 2007-02-23 15:07:44 +0000 | [diff] [blame] | 4844 | /* Can't use SLOT1 here, because nb_inplace_power is ternary */ |
| 4845 | static PyObject * |
| 4846 | slot_nb_inplace_power(PyObject *self, PyObject * arg1, PyObject *arg2) |
| 4847 | { |
| 4848 | static PyObject *cache_str; |
| 4849 | return call_method(self, "__ipow__", &cache_str, "(" "O" ")", arg1); |
| 4850 | } |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4851 | SLOT1(slot_nb_inplace_lshift, "__ilshift__", PyObject *, "O") |
| 4852 | SLOT1(slot_nb_inplace_rshift, "__irshift__", PyObject *, "O") |
| 4853 | SLOT1(slot_nb_inplace_and, "__iand__", PyObject *, "O") |
| 4854 | SLOT1(slot_nb_inplace_xor, "__ixor__", PyObject *, "O") |
| 4855 | SLOT1(slot_nb_inplace_or, "__ior__", PyObject *, "O") |
| 4856 | SLOT1BIN(slot_nb_floor_divide, nb_floor_divide, |
| 4857 | "__floordiv__", "__rfloordiv__") |
| 4858 | SLOT1BIN(slot_nb_true_divide, nb_true_divide, "__truediv__", "__rtruediv__") |
| 4859 | SLOT1(slot_nb_inplace_floor_divide, "__ifloordiv__", PyObject *, "O") |
| 4860 | SLOT1(slot_nb_inplace_true_divide, "__itruediv__", PyObject *, "O") |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4861 | |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4862 | static PyObject * |
| 4863 | slot_tp_repr(PyObject *self) |
| 4864 | { |
| 4865 | PyObject *func, *res; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4866 | static PyObject *repr_str; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4867 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4868 | func = lookup_method(self, "__repr__", &repr_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4869 | if (func != NULL) { |
| 4870 | res = PyEval_CallObject(func, NULL); |
| 4871 | Py_DECREF(func); |
| 4872 | return res; |
| 4873 | } |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 4874 | PyErr_Clear(); |
Walter Dörwald | 1ab8330 | 2007-05-18 17:15:44 +0000 | [diff] [blame] | 4875 | return PyUnicode_FromFormat("<%s object at %p>", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4876 | Py_TYPE(self)->tp_name, self); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4877 | } |
| 4878 | |
| 4879 | static PyObject * |
| 4880 | slot_tp_str(PyObject *self) |
| 4881 | { |
| 4882 | PyObject *func, *res; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4883 | static PyObject *str_str; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4884 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4885 | func = lookup_method(self, "__str__", &str_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4886 | if (func != NULL) { |
| 4887 | res = PyEval_CallObject(func, NULL); |
| 4888 | Py_DECREF(func); |
| 4889 | return res; |
| 4890 | } |
| 4891 | else { |
Walter Dörwald | 1ab8330 | 2007-05-18 17:15:44 +0000 | [diff] [blame] | 4892 | PyObject *ress; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4893 | PyErr_Clear(); |
Walter Dörwald | 1ab8330 | 2007-05-18 17:15:44 +0000 | [diff] [blame] | 4894 | res = slot_tp_repr(self); |
| 4895 | if (!res) |
| 4896 | return NULL; |
| 4897 | ress = _PyUnicode_AsDefaultEncodedString(res, NULL); |
| 4898 | Py_DECREF(res); |
| 4899 | return ress; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4900 | } |
| 4901 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4902 | |
| 4903 | static long |
| 4904 | slot_tp_hash(PyObject *self) |
| 4905 | { |
Guido van Rossum | 4011a24 | 2006-08-17 23:09:57 +0000 | [diff] [blame] | 4906 | PyObject *func, *res; |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 4907 | static PyObject *hash_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4908 | long h; |
| 4909 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4910 | func = lookup_method(self, "__hash__", &hash_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4911 | |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 4912 | if (func == Py_None) { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4913 | Py_DECREF(func); |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 4914 | func = NULL; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4915 | } |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 4916 | |
| 4917 | if (func == NULL) { |
Nick Coghlan | d1abd25 | 2008-07-15 15:46:38 +0000 | [diff] [blame] | 4918 | return PyObject_HashNotImplemented(self); |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 4919 | } |
| 4920 | |
Guido van Rossum | 4011a24 | 2006-08-17 23:09:57 +0000 | [diff] [blame] | 4921 | res = PyEval_CallObject(func, NULL); |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 4922 | Py_DECREF(func); |
| 4923 | if (res == NULL) |
| 4924 | return -1; |
| 4925 | if (PyLong_Check(res)) |
| 4926 | h = PyLong_Type.tp_hash(res); |
| 4927 | else |
Christian Heimes | 217cfd1 | 2007-12-02 14:31:20 +0000 | [diff] [blame] | 4928 | h = PyLong_AsLong(res); |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 4929 | Py_DECREF(res); |
| 4930 | if (h == -1 && !PyErr_Occurred()) |
| 4931 | h = -2; |
| 4932 | return h; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4933 | } |
| 4934 | |
| 4935 | static PyObject * |
| 4936 | slot_tp_call(PyObject *self, PyObject *args, PyObject *kwds) |
| 4937 | { |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4938 | static PyObject *call_str; |
| 4939 | PyObject *meth = lookup_method(self, "__call__", &call_str); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4940 | PyObject *res; |
| 4941 | |
| 4942 | if (meth == NULL) |
| 4943 | return NULL; |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 4944 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4945 | res = PyObject_Call(meth, args, kwds); |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 4946 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4947 | Py_DECREF(meth); |
| 4948 | return res; |
| 4949 | } |
| 4950 | |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 4951 | /* There are two slot dispatch functions for tp_getattro. |
| 4952 | |
| 4953 | - slot_tp_getattro() is used when __getattribute__ is overridden |
| 4954 | but no __getattr__ hook is present; |
| 4955 | |
| 4956 | - slot_tp_getattr_hook() is used when a __getattr__ hook is present. |
| 4957 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 4958 | The code in update_one_slot() always installs slot_tp_getattr_hook(); this |
| 4959 | detects the absence of __getattr__ and then installs the simpler slot if |
| 4960 | necessary. */ |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 4961 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4962 | static PyObject * |
| 4963 | slot_tp_getattro(PyObject *self, PyObject *name) |
| 4964 | { |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 4965 | static PyObject *getattribute_str = NULL; |
| 4966 | return call_method(self, "__getattribute__", &getattribute_str, |
| 4967 | "(O)", name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4968 | } |
| 4969 | |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 4970 | static PyObject * |
Benjamin Peterson | 9262b84 | 2008-11-17 22:45:50 +0000 | [diff] [blame] | 4971 | call_attribute(PyObject *self, PyObject *attr, PyObject *name) |
| 4972 | { |
| 4973 | PyObject *res, *descr = NULL; |
| 4974 | descrgetfunc f = Py_TYPE(attr)->tp_descr_get; |
| 4975 | |
| 4976 | if (f != NULL) { |
| 4977 | descr = f(attr, self, (PyObject *)(Py_TYPE(self))); |
| 4978 | if (descr == NULL) |
| 4979 | return NULL; |
| 4980 | else |
| 4981 | attr = descr; |
| 4982 | } |
| 4983 | res = PyObject_CallFunctionObjArgs(attr, name, NULL); |
| 4984 | Py_XDECREF(descr); |
| 4985 | return res; |
| 4986 | } |
| 4987 | |
| 4988 | static PyObject * |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 4989 | slot_tp_getattr_hook(PyObject *self, PyObject *name) |
| 4990 | { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 4991 | PyTypeObject *tp = Py_TYPE(self); |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 4992 | PyObject *getattr, *getattribute, *res; |
| 4993 | static PyObject *getattribute_str = NULL; |
| 4994 | static PyObject *getattr_str = NULL; |
| 4995 | |
| 4996 | if (getattr_str == NULL) { |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 4997 | getattr_str = PyUnicode_InternFromString("__getattr__"); |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 4998 | if (getattr_str == NULL) |
| 4999 | return NULL; |
| 5000 | } |
| 5001 | if (getattribute_str == NULL) { |
| 5002 | getattribute_str = |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 5003 | PyUnicode_InternFromString("__getattribute__"); |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5004 | if (getattribute_str == NULL) |
| 5005 | return NULL; |
| 5006 | } |
Benjamin Peterson | 9262b84 | 2008-11-17 22:45:50 +0000 | [diff] [blame] | 5007 | /* speed hack: we could use lookup_maybe, but that would resolve the |
| 5008 | method fully for each attribute lookup for classes with |
| 5009 | __getattr__, even when the attribute is present. So we use |
| 5010 | _PyType_Lookup and create the method only when needed, with |
| 5011 | call_attribute. */ |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5012 | getattr = _PyType_Lookup(tp, getattr_str); |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5013 | if (getattr == NULL) { |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5014 | /* No __getattr__ hook: use a simpler dispatcher */ |
| 5015 | tp->tp_getattro = slot_tp_getattro; |
| 5016 | return slot_tp_getattro(self, name); |
| 5017 | } |
Benjamin Peterson | 9262b84 | 2008-11-17 22:45:50 +0000 | [diff] [blame] | 5018 | Py_INCREF(getattr); |
| 5019 | /* speed hack: we could use lookup_maybe, but that would resolve the |
| 5020 | method fully for each attribute lookup for classes with |
| 5021 | __getattr__, even when self has the default __getattribute__ |
| 5022 | method. So we use _PyType_Lookup and create the method only when |
| 5023 | needed, with call_attribute. */ |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5024 | getattribute = _PyType_Lookup(tp, getattribute_str); |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5025 | if (getattribute == NULL || |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5026 | (Py_TYPE(getattribute) == &PyWrapperDescr_Type && |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5027 | ((PyWrapperDescrObject *)getattribute)->d_wrapped == |
| 5028 | (void *)PyObject_GenericGetAttr)) |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5029 | res = PyObject_GenericGetAttr(self, name); |
Benjamin Peterson | 9262b84 | 2008-11-17 22:45:50 +0000 | [diff] [blame] | 5030 | else { |
| 5031 | Py_INCREF(getattribute); |
| 5032 | res = call_attribute(self, getattribute, name); |
| 5033 | Py_DECREF(getattribute); |
| 5034 | } |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5035 | if (res == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) { |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5036 | PyErr_Clear(); |
Benjamin Peterson | 9262b84 | 2008-11-17 22:45:50 +0000 | [diff] [blame] | 5037 | res = call_attribute(self, getattr, name); |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5038 | } |
Benjamin Peterson | 9262b84 | 2008-11-17 22:45:50 +0000 | [diff] [blame] | 5039 | Py_DECREF(getattr); |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5040 | return res; |
| 5041 | } |
| 5042 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5043 | static int |
| 5044 | slot_tp_setattro(PyObject *self, PyObject *name, PyObject *value) |
| 5045 | { |
| 5046 | PyObject *res; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5047 | static PyObject *delattr_str, *setattr_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5048 | |
| 5049 | if (value == NULL) |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5050 | res = call_method(self, "__delattr__", &delattr_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5051 | "(O)", name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5052 | else |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5053 | res = call_method(self, "__setattr__", &setattr_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5054 | "(OO)", name, value); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5055 | if (res == NULL) |
| 5056 | return -1; |
| 5057 | Py_DECREF(res); |
| 5058 | return 0; |
| 5059 | } |
| 5060 | |
Guido van Rossum | f5243f0 | 2008-01-01 04:06:48 +0000 | [diff] [blame] | 5061 | static char *name_op[] = { |
| 5062 | "__lt__", |
| 5063 | "__le__", |
| 5064 | "__eq__", |
| 5065 | "__ne__", |
| 5066 | "__gt__", |
| 5067 | "__ge__", |
| 5068 | }; |
| 5069 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5070 | static PyObject * |
Mark Dickinson | 6f1d049 | 2009-11-15 13:58:49 +0000 | [diff] [blame] | 5071 | slot_tp_richcompare(PyObject *self, PyObject *other, int op) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5072 | { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5073 | PyObject *func, *args, *res; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5074 | static PyObject *op_str[6]; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5075 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5076 | func = lookup_method(self, name_op[op], &op_str[op]); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5077 | if (func == NULL) { |
| 5078 | PyErr_Clear(); |
| 5079 | Py_INCREF(Py_NotImplemented); |
| 5080 | return Py_NotImplemented; |
| 5081 | } |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 5082 | args = PyTuple_Pack(1, other); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5083 | if (args == NULL) |
| 5084 | res = NULL; |
| 5085 | else { |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5086 | res = PyObject_Call(func, args, NULL); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5087 | Py_DECREF(args); |
| 5088 | } |
| 5089 | Py_DECREF(func); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5090 | return res; |
| 5091 | } |
| 5092 | |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5093 | static PyObject * |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5094 | slot_tp_iter(PyObject *self) |
| 5095 | { |
| 5096 | PyObject *func, *res; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5097 | static PyObject *iter_str, *getitem_str; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5098 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5099 | func = lookup_method(self, "__iter__", &iter_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5100 | if (func != NULL) { |
Guido van Rossum | 84b2bed | 2002-08-16 17:01:09 +0000 | [diff] [blame] | 5101 | PyObject *args; |
| 5102 | args = res = PyTuple_New(0); |
| 5103 | if (args != NULL) { |
| 5104 | res = PyObject_Call(func, args, NULL); |
| 5105 | Py_DECREF(args); |
| 5106 | } |
| 5107 | Py_DECREF(func); |
| 5108 | return res; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5109 | } |
| 5110 | PyErr_Clear(); |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5111 | func = lookup_method(self, "__getitem__", &getitem_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5112 | if (func == NULL) { |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 5113 | PyErr_Format(PyExc_TypeError, |
| 5114 | "'%.200s' object is not iterable", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5115 | Py_TYPE(self)->tp_name); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5116 | return NULL; |
| 5117 | } |
| 5118 | Py_DECREF(func); |
| 5119 | return PySeqIter_New(self); |
| 5120 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5121 | |
| 5122 | static PyObject * |
| 5123 | slot_tp_iternext(PyObject *self) |
| 5124 | { |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5125 | static PyObject *next_str; |
Georg Brandl | a18af4e | 2007-04-21 15:47:16 +0000 | [diff] [blame] | 5126 | return call_method(self, "__next__", &next_str, "()"); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5127 | } |
| 5128 | |
Guido van Rossum | 1a49350 | 2001-08-17 16:47:50 +0000 | [diff] [blame] | 5129 | static PyObject * |
| 5130 | slot_tp_descr_get(PyObject *self, PyObject *obj, PyObject *type) |
| 5131 | { |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5132 | PyTypeObject *tp = Py_TYPE(self); |
Guido van Rossum | 1a49350 | 2001-08-17 16:47:50 +0000 | [diff] [blame] | 5133 | PyObject *get; |
| 5134 | static PyObject *get_str = NULL; |
| 5135 | |
| 5136 | if (get_str == NULL) { |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 5137 | get_str = PyUnicode_InternFromString("__get__"); |
Guido van Rossum | 1a49350 | 2001-08-17 16:47:50 +0000 | [diff] [blame] | 5138 | if (get_str == NULL) |
| 5139 | return NULL; |
| 5140 | } |
| 5141 | get = _PyType_Lookup(tp, get_str); |
| 5142 | if (get == NULL) { |
| 5143 | /* Avoid further slowdowns */ |
| 5144 | if (tp->tp_descr_get == slot_tp_descr_get) |
| 5145 | tp->tp_descr_get = NULL; |
| 5146 | Py_INCREF(self); |
| 5147 | return self; |
| 5148 | } |
Guido van Rossum | 2c25239 | 2001-08-24 10:13:31 +0000 | [diff] [blame] | 5149 | if (obj == NULL) |
| 5150 | obj = Py_None; |
| 5151 | if (type == NULL) |
| 5152 | type = Py_None; |
Thomas Wouters | 477c8d5 | 2006-05-27 19:21:47 +0000 | [diff] [blame] | 5153 | return PyObject_CallFunctionObjArgs(get, self, obj, type, NULL); |
Guido van Rossum | 1a49350 | 2001-08-17 16:47:50 +0000 | [diff] [blame] | 5154 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5155 | |
| 5156 | static int |
| 5157 | slot_tp_descr_set(PyObject *self, PyObject *target, PyObject *value) |
| 5158 | { |
Guido van Rossum | 2c25239 | 2001-08-24 10:13:31 +0000 | [diff] [blame] | 5159 | PyObject *res; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5160 | static PyObject *del_str, *set_str; |
Guido van Rossum | 2c25239 | 2001-08-24 10:13:31 +0000 | [diff] [blame] | 5161 | |
| 5162 | if (value == NULL) |
Guido van Rossum | 1d5b3f2 | 2001-12-03 00:08:33 +0000 | [diff] [blame] | 5163 | res = call_method(self, "__delete__", &del_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5164 | "(O)", target); |
Guido van Rossum | 2c25239 | 2001-08-24 10:13:31 +0000 | [diff] [blame] | 5165 | else |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5166 | res = call_method(self, "__set__", &set_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5167 | "(OO)", target, value); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5168 | if (res == NULL) |
| 5169 | return -1; |
| 5170 | Py_DECREF(res); |
| 5171 | return 0; |
| 5172 | } |
| 5173 | |
| 5174 | static int |
| 5175 | slot_tp_init(PyObject *self, PyObject *args, PyObject *kwds) |
| 5176 | { |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5177 | static PyObject *init_str; |
| 5178 | PyObject *meth = lookup_method(self, "__init__", &init_str); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5179 | PyObject *res; |
| 5180 | |
| 5181 | if (meth == NULL) |
| 5182 | return -1; |
| 5183 | res = PyObject_Call(meth, args, kwds); |
| 5184 | Py_DECREF(meth); |
| 5185 | if (res == NULL) |
| 5186 | return -1; |
Raymond Hettinger | b67cc80 | 2005-03-03 16:45:19 +0000 | [diff] [blame] | 5187 | if (res != Py_None) { |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 5188 | PyErr_Format(PyExc_TypeError, |
| 5189 | "__init__() should return None, not '%.200s'", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5190 | Py_TYPE(res)->tp_name); |
Raymond Hettinger | b67cc80 | 2005-03-03 16:45:19 +0000 | [diff] [blame] | 5191 | Py_DECREF(res); |
| 5192 | return -1; |
| 5193 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5194 | Py_DECREF(res); |
| 5195 | return 0; |
| 5196 | } |
| 5197 | |
| 5198 | static PyObject * |
| 5199 | slot_tp_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 5200 | { |
Guido van Rossum | 7bed213 | 2002-08-08 21:57:53 +0000 | [diff] [blame] | 5201 | static PyObject *new_str; |
| 5202 | PyObject *func; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5203 | PyObject *newargs, *x; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5204 | Py_ssize_t i, n; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5205 | |
Guido van Rossum | 7bed213 | 2002-08-08 21:57:53 +0000 | [diff] [blame] | 5206 | if (new_str == NULL) { |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 5207 | new_str = PyUnicode_InternFromString("__new__"); |
Guido van Rossum | 7bed213 | 2002-08-08 21:57:53 +0000 | [diff] [blame] | 5208 | if (new_str == NULL) |
| 5209 | return NULL; |
| 5210 | } |
| 5211 | func = PyObject_GetAttr((PyObject *)type, new_str); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5212 | if (func == NULL) |
| 5213 | return NULL; |
| 5214 | assert(PyTuple_Check(args)); |
| 5215 | n = PyTuple_GET_SIZE(args); |
| 5216 | newargs = PyTuple_New(n+1); |
| 5217 | if (newargs == NULL) |
| 5218 | return NULL; |
| 5219 | Py_INCREF(type); |
| 5220 | PyTuple_SET_ITEM(newargs, 0, (PyObject *)type); |
| 5221 | for (i = 0; i < n; i++) { |
| 5222 | x = PyTuple_GET_ITEM(args, i); |
| 5223 | Py_INCREF(x); |
| 5224 | PyTuple_SET_ITEM(newargs, i+1, x); |
| 5225 | } |
| 5226 | x = PyObject_Call(func, newargs, kwds); |
Guido van Rossum | 25d1807 | 2001-10-01 15:55:28 +0000 | [diff] [blame] | 5227 | Py_DECREF(newargs); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5228 | Py_DECREF(func); |
| 5229 | return x; |
| 5230 | } |
| 5231 | |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5232 | static void |
| 5233 | slot_tp_del(PyObject *self) |
| 5234 | { |
| 5235 | static PyObject *del_str = NULL; |
| 5236 | PyObject *del, *res; |
| 5237 | PyObject *error_type, *error_value, *error_traceback; |
| 5238 | |
| 5239 | /* Temporarily resurrect the object. */ |
| 5240 | assert(self->ob_refcnt == 0); |
| 5241 | self->ob_refcnt = 1; |
| 5242 | |
| 5243 | /* Save the current exception, if any. */ |
| 5244 | PyErr_Fetch(&error_type, &error_value, &error_traceback); |
| 5245 | |
| 5246 | /* Execute __del__ method, if any. */ |
| 5247 | del = lookup_maybe(self, "__del__", &del_str); |
| 5248 | if (del != NULL) { |
| 5249 | res = PyEval_CallObject(del, NULL); |
| 5250 | if (res == NULL) |
| 5251 | PyErr_WriteUnraisable(del); |
| 5252 | else |
| 5253 | Py_DECREF(res); |
| 5254 | Py_DECREF(del); |
| 5255 | } |
| 5256 | |
| 5257 | /* Restore the saved exception. */ |
| 5258 | PyErr_Restore(error_type, error_value, error_traceback); |
| 5259 | |
| 5260 | /* Undo the temporary resurrection; can't use DECREF here, it would |
| 5261 | * cause a recursive call. |
| 5262 | */ |
| 5263 | assert(self->ob_refcnt > 0); |
| 5264 | if (--self->ob_refcnt == 0) |
| 5265 | return; /* this is the normal path out */ |
| 5266 | |
| 5267 | /* __del__ resurrected it! Make it look like the original Py_DECREF |
| 5268 | * never happened. |
| 5269 | */ |
| 5270 | { |
Martin v. Löwis | 725507b | 2006-03-07 12:08:51 +0000 | [diff] [blame] | 5271 | Py_ssize_t refcnt = self->ob_refcnt; |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5272 | _Py_NewReference(self); |
| 5273 | self->ob_refcnt = refcnt; |
| 5274 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5275 | assert(!PyType_IS_GC(Py_TYPE(self)) || |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5276 | _Py_AS_GC(self)->gc.gc_refs != _PyGC_REFS_UNTRACKED); |
Michael W. Hudson | 3f3b668 | 2004-08-03 10:21:03 +0000 | [diff] [blame] | 5277 | /* If Py_REF_DEBUG, _Py_NewReference bumped _Py_RefTotal, so |
| 5278 | * we need to undo that. */ |
| 5279 | _Py_DEC_REFTOTAL; |
| 5280 | /* If Py_TRACE_REFS, _Py_NewReference re-added self to the object |
| 5281 | * chain, so no more to do there. |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5282 | * If COUNT_ALLOCS, the original decref bumped tp_frees, and |
| 5283 | * _Py_NewReference bumped tp_allocs: both of those need to be |
| 5284 | * undone. |
| 5285 | */ |
| 5286 | #ifdef COUNT_ALLOCS |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5287 | --Py_TYPE(self)->tp_frees; |
| 5288 | --Py_TYPE(self)->tp_allocs; |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5289 | #endif |
| 5290 | } |
| 5291 | |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5292 | |
| 5293 | /* Table mapping __foo__ names to tp_foo offsets and slot_tp_foo wrapper |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 5294 | functions. The offsets here are relative to the 'PyHeapTypeObject' |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5295 | structure, which incorporates the additional structures used for numbers, |
| 5296 | sequences and mappings. |
| 5297 | Note that multiple names may map to the same slot (e.g. __eq__, |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5298 | __ne__ etc. all map to tp_richcompare) and one name may map to multiple |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5299 | slots (e.g. __str__ affects tp_str as well as tp_repr). The table is |
| 5300 | terminated with an all-zero entry. (This table is further initialized and |
| 5301 | sorted in init_slotdefs() below.) */ |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5302 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5303 | typedef struct wrapperbase slotdef; |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5304 | |
| 5305 | #undef TPSLOT |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5306 | #undef FLSLOT |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5307 | #undef ETSLOT |
| 5308 | #undef SQSLOT |
| 5309 | #undef MPSLOT |
| 5310 | #undef NBSLOT |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5311 | #undef UNSLOT |
| 5312 | #undef IBSLOT |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5313 | #undef BINSLOT |
| 5314 | #undef RBINSLOT |
| 5315 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5316 | #define TPSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
Neal Norwitz | d47714a | 2002-08-13 19:01:38 +0000 | [diff] [blame] | 5317 | {NAME, offsetof(PyTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \ |
| 5318 | PyDoc_STR(DOC)} |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5319 | #define FLSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC, FLAGS) \ |
| 5320 | {NAME, offsetof(PyTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \ |
Neal Norwitz | d47714a | 2002-08-13 19:01:38 +0000 | [diff] [blame] | 5321 | PyDoc_STR(DOC), FLAGS} |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5322 | #define ETSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5323 | {NAME, offsetof(PyHeapTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \ |
Neal Norwitz | d47714a | 2002-08-13 19:01:38 +0000 | [diff] [blame] | 5324 | PyDoc_STR(DOC)} |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5325 | #define SQSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5326 | ETSLOT(NAME, as_sequence.SLOT, FUNCTION, WRAPPER, DOC) |
| 5327 | #define MPSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5328 | ETSLOT(NAME, as_mapping.SLOT, FUNCTION, WRAPPER, DOC) |
| 5329 | #define NBSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5330 | ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, DOC) |
| 5331 | #define UNSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5332 | ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, \ |
| 5333 | "x." NAME "() <==> " DOC) |
| 5334 | #define IBSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5335 | ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, \ |
| 5336 | "x." NAME "(y) <==> x" DOC "y") |
| 5337 | #define BINSLOT(NAME, SLOT, FUNCTION, DOC) \ |
| 5338 | ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_l, \ |
| 5339 | "x." NAME "(y) <==> x" DOC "y") |
| 5340 | #define RBINSLOT(NAME, SLOT, FUNCTION, DOC) \ |
| 5341 | ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_r, \ |
| 5342 | "x." NAME "(y) <==> y" DOC "x") |
Anthony Baxter | 5661699 | 2005-06-03 14:12:21 +0000 | [diff] [blame] | 5343 | #define BINSLOTNOTINFIX(NAME, SLOT, FUNCTION, DOC) \ |
| 5344 | ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_l, \ |
| 5345 | "x." NAME "(y) <==> " DOC) |
| 5346 | #define RBINSLOTNOTINFIX(NAME, SLOT, FUNCTION, DOC) \ |
| 5347 | ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_r, \ |
| 5348 | "x." NAME "(y) <==> " DOC) |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5349 | |
| 5350 | static slotdef slotdefs[] = { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5351 | SQSLOT("__len__", sq_length, slot_sq_length, wrap_lenfunc, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5352 | "x.__len__() <==> len(x)"), |
Armin Rigo | fd163f9 | 2005-12-29 15:59:19 +0000 | [diff] [blame] | 5353 | /* Heap types defining __add__/__mul__ have sq_concat/sq_repeat == NULL. |
| 5354 | The logic in abstract.c always falls back to nb_add/nb_multiply in |
| 5355 | this case. Defining both the nb_* and the sq_* slots to call the |
| 5356 | user-defined methods has unexpected side-effects, as shown by |
| 5357 | test_descr.notimplemented() */ |
| 5358 | SQSLOT("__add__", sq_concat, NULL, wrap_binaryfunc, |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 5359 | "x.__add__(y) <==> x+y"), |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 5360 | SQSLOT("__mul__", sq_repeat, NULL, wrap_indexargfunc, |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 5361 | "x.__mul__(n) <==> x*n"), |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 5362 | SQSLOT("__rmul__", sq_repeat, NULL, wrap_indexargfunc, |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 5363 | "x.__rmul__(n) <==> n*x"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5364 | SQSLOT("__getitem__", sq_item, slot_sq_item, wrap_sq_item, |
| 5365 | "x.__getitem__(y) <==> x[y]"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5366 | SQSLOT("__setitem__", sq_ass_item, slot_sq_ass_item, wrap_sq_setitem, |
Brett Cannon | be67d87 | 2003-05-20 02:40:12 +0000 | [diff] [blame] | 5367 | "x.__setitem__(i, y) <==> x[i]=y"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5368 | SQSLOT("__delitem__", sq_ass_item, slot_sq_ass_item, wrap_sq_delitem, |
Brett Cannon | be67d87 | 2003-05-20 02:40:12 +0000 | [diff] [blame] | 5369 | "x.__delitem__(y) <==> del x[y]"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5370 | SQSLOT("__contains__", sq_contains, slot_sq_contains, wrap_objobjproc, |
| 5371 | "x.__contains__(y) <==> y in x"), |
Armin Rigo | fd163f9 | 2005-12-29 15:59:19 +0000 | [diff] [blame] | 5372 | SQSLOT("__iadd__", sq_inplace_concat, NULL, |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 5373 | wrap_binaryfunc, "x.__iadd__(y) <==> x+=y"), |
Armin Rigo | fd163f9 | 2005-12-29 15:59:19 +0000 | [diff] [blame] | 5374 | SQSLOT("__imul__", sq_inplace_repeat, NULL, |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 5375 | wrap_indexargfunc, "x.__imul__(y) <==> x*=y"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5376 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5377 | MPSLOT("__len__", mp_length, slot_mp_length, wrap_lenfunc, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5378 | "x.__len__() <==> len(x)"), |
Guido van Rossum | fd38f8e | 2001-10-09 20:17:57 +0000 | [diff] [blame] | 5379 | MPSLOT("__getitem__", mp_subscript, slot_mp_subscript, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5380 | wrap_binaryfunc, |
| 5381 | "x.__getitem__(y) <==> x[y]"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5382 | MPSLOT("__setitem__", mp_ass_subscript, slot_mp_ass_subscript, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5383 | wrap_objobjargproc, |
| 5384 | "x.__setitem__(i, y) <==> x[i]=y"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5385 | MPSLOT("__delitem__", mp_ass_subscript, slot_mp_ass_subscript, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5386 | wrap_delitem, |
| 5387 | "x.__delitem__(y) <==> del x[y]"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5388 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5389 | BINSLOT("__add__", nb_add, slot_nb_add, |
| 5390 | "+"), |
| 5391 | RBINSLOT("__radd__", nb_add, slot_nb_add, |
| 5392 | "+"), |
| 5393 | BINSLOT("__sub__", nb_subtract, slot_nb_subtract, |
| 5394 | "-"), |
| 5395 | RBINSLOT("__rsub__", nb_subtract, slot_nb_subtract, |
| 5396 | "-"), |
| 5397 | BINSLOT("__mul__", nb_multiply, slot_nb_multiply, |
| 5398 | "*"), |
| 5399 | RBINSLOT("__rmul__", nb_multiply, slot_nb_multiply, |
| 5400 | "*"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5401 | BINSLOT("__mod__", nb_remainder, slot_nb_remainder, |
| 5402 | "%"), |
| 5403 | RBINSLOT("__rmod__", nb_remainder, slot_nb_remainder, |
| 5404 | "%"), |
Anthony Baxter | 5661699 | 2005-06-03 14:12:21 +0000 | [diff] [blame] | 5405 | BINSLOTNOTINFIX("__divmod__", nb_divmod, slot_nb_divmod, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5406 | "divmod(x, y)"), |
Anthony Baxter | 5661699 | 2005-06-03 14:12:21 +0000 | [diff] [blame] | 5407 | RBINSLOTNOTINFIX("__rdivmod__", nb_divmod, slot_nb_divmod, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5408 | "divmod(y, x)"), |
| 5409 | NBSLOT("__pow__", nb_power, slot_nb_power, wrap_ternaryfunc, |
| 5410 | "x.__pow__(y[, z]) <==> pow(x, y[, z])"), |
| 5411 | NBSLOT("__rpow__", nb_power, slot_nb_power, wrap_ternaryfunc_r, |
| 5412 | "y.__rpow__(x[, z]) <==> pow(x, y[, z])"), |
| 5413 | UNSLOT("__neg__", nb_negative, slot_nb_negative, wrap_unaryfunc, "-x"), |
| 5414 | UNSLOT("__pos__", nb_positive, slot_nb_positive, wrap_unaryfunc, "+x"), |
| 5415 | UNSLOT("__abs__", nb_absolute, slot_nb_absolute, wrap_unaryfunc, |
| 5416 | "abs(x)"), |
Jack Diederich | 4dafcc4 | 2006-11-28 19:15:13 +0000 | [diff] [blame] | 5417 | UNSLOT("__bool__", nb_bool, slot_nb_bool, wrap_inquirypred, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5418 | "x != 0"), |
| 5419 | UNSLOT("__invert__", nb_invert, slot_nb_invert, wrap_unaryfunc, "~x"), |
| 5420 | BINSLOT("__lshift__", nb_lshift, slot_nb_lshift, "<<"), |
| 5421 | RBINSLOT("__rlshift__", nb_lshift, slot_nb_lshift, "<<"), |
| 5422 | BINSLOT("__rshift__", nb_rshift, slot_nb_rshift, ">>"), |
| 5423 | RBINSLOT("__rrshift__", nb_rshift, slot_nb_rshift, ">>"), |
| 5424 | BINSLOT("__and__", nb_and, slot_nb_and, "&"), |
| 5425 | RBINSLOT("__rand__", nb_and, slot_nb_and, "&"), |
| 5426 | BINSLOT("__xor__", nb_xor, slot_nb_xor, "^"), |
| 5427 | RBINSLOT("__rxor__", nb_xor, slot_nb_xor, "^"), |
| 5428 | BINSLOT("__or__", nb_or, slot_nb_or, "|"), |
| 5429 | RBINSLOT("__ror__", nb_or, slot_nb_or, "|"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5430 | UNSLOT("__int__", nb_int, slot_nb_int, wrap_unaryfunc, |
| 5431 | "int(x)"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5432 | UNSLOT("__float__", nb_float, slot_nb_float, wrap_unaryfunc, |
| 5433 | "float(x)"), |
Thomas Wouters | 00ee7ba | 2006-08-21 19:07:27 +0000 | [diff] [blame] | 5434 | NBSLOT("__index__", nb_index, slot_nb_index, wrap_unaryfunc, |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 5435 | "x[y:z] <==> x[y.__index__():z.__index__()]"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5436 | IBSLOT("__iadd__", nb_inplace_add, slot_nb_inplace_add, |
| 5437 | wrap_binaryfunc, "+"), |
| 5438 | IBSLOT("__isub__", nb_inplace_subtract, slot_nb_inplace_subtract, |
| 5439 | wrap_binaryfunc, "-"), |
| 5440 | IBSLOT("__imul__", nb_inplace_multiply, slot_nb_inplace_multiply, |
| 5441 | wrap_binaryfunc, "*"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5442 | IBSLOT("__imod__", nb_inplace_remainder, slot_nb_inplace_remainder, |
| 5443 | wrap_binaryfunc, "%"), |
| 5444 | IBSLOT("__ipow__", nb_inplace_power, slot_nb_inplace_power, |
Guido van Rossum | 6e5680f | 2002-10-15 01:01:53 +0000 | [diff] [blame] | 5445 | wrap_binaryfunc, "**"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5446 | IBSLOT("__ilshift__", nb_inplace_lshift, slot_nb_inplace_lshift, |
| 5447 | wrap_binaryfunc, "<<"), |
| 5448 | IBSLOT("__irshift__", nb_inplace_rshift, slot_nb_inplace_rshift, |
| 5449 | wrap_binaryfunc, ">>"), |
| 5450 | IBSLOT("__iand__", nb_inplace_and, slot_nb_inplace_and, |
| 5451 | wrap_binaryfunc, "&"), |
| 5452 | IBSLOT("__ixor__", nb_inplace_xor, slot_nb_inplace_xor, |
| 5453 | wrap_binaryfunc, "^"), |
| 5454 | IBSLOT("__ior__", nb_inplace_or, slot_nb_inplace_or, |
| 5455 | wrap_binaryfunc, "|"), |
| 5456 | BINSLOT("__floordiv__", nb_floor_divide, slot_nb_floor_divide, "//"), |
| 5457 | RBINSLOT("__rfloordiv__", nb_floor_divide, slot_nb_floor_divide, "//"), |
| 5458 | BINSLOT("__truediv__", nb_true_divide, slot_nb_true_divide, "/"), |
| 5459 | RBINSLOT("__rtruediv__", nb_true_divide, slot_nb_true_divide, "/"), |
| 5460 | IBSLOT("__ifloordiv__", nb_inplace_floor_divide, |
| 5461 | slot_nb_inplace_floor_divide, wrap_binaryfunc, "//"), |
| 5462 | IBSLOT("__itruediv__", nb_inplace_true_divide, |
| 5463 | slot_nb_inplace_true_divide, wrap_binaryfunc, "/"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5464 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5465 | TPSLOT("__str__", tp_str, slot_tp_str, wrap_unaryfunc, |
| 5466 | "x.__str__() <==> str(x)"), |
| 5467 | TPSLOT("__repr__", tp_repr, slot_tp_repr, wrap_unaryfunc, |
| 5468 | "x.__repr__() <==> repr(x)"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5469 | TPSLOT("__hash__", tp_hash, slot_tp_hash, wrap_hashfunc, |
| 5470 | "x.__hash__() <==> hash(x)"), |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5471 | FLSLOT("__call__", tp_call, slot_tp_call, (wrapperfunc)wrap_call, |
| 5472 | "x.__call__(...) <==> x(...)", PyWrapperFlag_KEYWORDS), |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5473 | TPSLOT("__getattribute__", tp_getattro, slot_tp_getattr_hook, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5474 | wrap_binaryfunc, "x.__getattribute__('name') <==> x.name"), |
| 5475 | TPSLOT("__getattribute__", tp_getattr, NULL, NULL, ""), |
| 5476 | TPSLOT("__getattr__", tp_getattro, slot_tp_getattr_hook, NULL, ""), |
| 5477 | TPSLOT("__getattr__", tp_getattr, NULL, NULL, ""), |
| 5478 | TPSLOT("__setattr__", tp_setattro, slot_tp_setattro, wrap_setattr, |
| 5479 | "x.__setattr__('name', value) <==> x.name = value"), |
| 5480 | TPSLOT("__setattr__", tp_setattr, NULL, NULL, ""), |
| 5481 | TPSLOT("__delattr__", tp_setattro, slot_tp_setattro, wrap_delattr, |
| 5482 | "x.__delattr__('name') <==> del x.name"), |
| 5483 | TPSLOT("__delattr__", tp_setattr, NULL, NULL, ""), |
| 5484 | TPSLOT("__lt__", tp_richcompare, slot_tp_richcompare, richcmp_lt, |
| 5485 | "x.__lt__(y) <==> x<y"), |
| 5486 | TPSLOT("__le__", tp_richcompare, slot_tp_richcompare, richcmp_le, |
| 5487 | "x.__le__(y) <==> x<=y"), |
| 5488 | TPSLOT("__eq__", tp_richcompare, slot_tp_richcompare, richcmp_eq, |
| 5489 | "x.__eq__(y) <==> x==y"), |
| 5490 | TPSLOT("__ne__", tp_richcompare, slot_tp_richcompare, richcmp_ne, |
| 5491 | "x.__ne__(y) <==> x!=y"), |
| 5492 | TPSLOT("__gt__", tp_richcompare, slot_tp_richcompare, richcmp_gt, |
| 5493 | "x.__gt__(y) <==> x>y"), |
| 5494 | TPSLOT("__ge__", tp_richcompare, slot_tp_richcompare, richcmp_ge, |
| 5495 | "x.__ge__(y) <==> x>=y"), |
| 5496 | TPSLOT("__iter__", tp_iter, slot_tp_iter, wrap_unaryfunc, |
| 5497 | "x.__iter__() <==> iter(x)"), |
Georg Brandl | a18af4e | 2007-04-21 15:47:16 +0000 | [diff] [blame] | 5498 | TPSLOT("__next__", tp_iternext, slot_tp_iternext, wrap_next, |
| 5499 | "x.__next__() <==> next(x)"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5500 | TPSLOT("__get__", tp_descr_get, slot_tp_descr_get, wrap_descr_get, |
| 5501 | "descr.__get__(obj[, type]) -> value"), |
| 5502 | TPSLOT("__set__", tp_descr_set, slot_tp_descr_set, wrap_descr_set, |
| 5503 | "descr.__set__(obj, value)"), |
Guido van Rossum | 0dbab4c5 | 2002-08-01 14:39:25 +0000 | [diff] [blame] | 5504 | TPSLOT("__delete__", tp_descr_set, slot_tp_descr_set, |
| 5505 | wrap_descr_delete, "descr.__delete__(obj)"), |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5506 | FLSLOT("__init__", tp_init, slot_tp_init, (wrapperfunc)wrap_init, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5507 | "x.__init__(...) initializes x; " |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5508 | "see x.__class__.__doc__ for signature", |
| 5509 | PyWrapperFlag_KEYWORDS), |
| 5510 | TPSLOT("__new__", tp_new, slot_tp_new, NULL, ""), |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5511 | TPSLOT("__del__", tp_del, slot_tp_del, NULL, ""), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5512 | {NULL} |
| 5513 | }; |
| 5514 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5515 | /* Given a type pointer and an offset gotten from a slotdef entry, return a |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 5516 | pointer to the actual slot. This is not quite the same as simply adding |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5517 | the offset to the type pointer, since it takes care to indirect through the |
| 5518 | proper indirection pointer (as_buffer, etc.); it returns NULL if the |
| 5519 | indirection pointer is NULL. */ |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5520 | static void ** |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5521 | slotptr(PyTypeObject *type, int ioffset) |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5522 | { |
| 5523 | char *ptr; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5524 | long offset = ioffset; |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5525 | |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5526 | /* Note: this depends on the order of the members of PyHeapTypeObject! */ |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5527 | assert(offset >= 0); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 5528 | assert((size_t)offset < offsetof(PyHeapTypeObject, as_buffer)); |
| 5529 | if ((size_t)offset >= offsetof(PyHeapTypeObject, as_sequence)) { |
| 5530 | ptr = (char *)type->tp_as_sequence; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5531 | offset -= offsetof(PyHeapTypeObject, as_sequence); |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5532 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 5533 | else if ((size_t)offset >= offsetof(PyHeapTypeObject, as_mapping)) { |
| 5534 | ptr = (char *)type->tp_as_mapping; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5535 | offset -= offsetof(PyHeapTypeObject, as_mapping); |
Guido van Rossum | 09638c1 | 2002-06-13 19:17:46 +0000 | [diff] [blame] | 5536 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 5537 | else if ((size_t)offset >= offsetof(PyHeapTypeObject, as_number)) { |
| 5538 | ptr = (char *)type->tp_as_number; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5539 | offset -= offsetof(PyHeapTypeObject, as_number); |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5540 | } |
| 5541 | else { |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 5542 | ptr = (char *)type; |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5543 | } |
| 5544 | if (ptr != NULL) |
| 5545 | ptr += offset; |
| 5546 | return (void **)ptr; |
| 5547 | } |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 5548 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5549 | /* Length of array of slotdef pointers used to store slots with the |
| 5550 | same __name__. There should be at most MAX_EQUIV-1 slotdef entries with |
| 5551 | the same __name__, for any __name__. Since that's a static property, it is |
| 5552 | appropriate to declare fixed-size arrays for this. */ |
| 5553 | #define MAX_EQUIV 10 |
| 5554 | |
| 5555 | /* Return a slot pointer for a given name, but ONLY if the attribute has |
| 5556 | exactly one slot function. The name must be an interned string. */ |
| 5557 | static void ** |
| 5558 | resolve_slotdups(PyTypeObject *type, PyObject *name) |
| 5559 | { |
| 5560 | /* XXX Maybe this could be optimized more -- but is it worth it? */ |
| 5561 | |
| 5562 | /* pname and ptrs act as a little cache */ |
| 5563 | static PyObject *pname; |
| 5564 | static slotdef *ptrs[MAX_EQUIV]; |
| 5565 | slotdef *p, **pp; |
| 5566 | void **res, **ptr; |
| 5567 | |
| 5568 | if (pname != name) { |
| 5569 | /* Collect all slotdefs that match name into ptrs. */ |
| 5570 | pname = name; |
| 5571 | pp = ptrs; |
| 5572 | for (p = slotdefs; p->name_strobj; p++) { |
| 5573 | if (p->name_strobj == name) |
| 5574 | *pp++ = p; |
| 5575 | } |
| 5576 | *pp = NULL; |
| 5577 | } |
| 5578 | |
| 5579 | /* Look in all matching slots of the type; if exactly one of these has |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 5580 | a filled-in slot, return its value. Otherwise return NULL. */ |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5581 | res = NULL; |
| 5582 | for (pp = ptrs; *pp; pp++) { |
| 5583 | ptr = slotptr(type, (*pp)->offset); |
| 5584 | if (ptr == NULL || *ptr == NULL) |
| 5585 | continue; |
| 5586 | if (res != NULL) |
| 5587 | return NULL; |
| 5588 | res = ptr; |
| 5589 | } |
| 5590 | return res; |
| 5591 | } |
| 5592 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5593 | /* Common code for update_slots_callback() and fixup_slot_dispatchers(). This |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5594 | does some incredibly complex thinking and then sticks something into the |
| 5595 | slot. (It sees if the adjacent slotdefs for the same slot have conflicting |
| 5596 | interests, and then stores a generic wrapper or a specific function into |
| 5597 | the slot.) Return a pointer to the next slotdef with a different offset, |
| 5598 | because that's convenient for fixup_slot_dispatchers(). */ |
| 5599 | static slotdef * |
| 5600 | update_one_slot(PyTypeObject *type, slotdef *p) |
| 5601 | { |
| 5602 | PyObject *descr; |
| 5603 | PyWrapperDescrObject *d; |
| 5604 | void *generic = NULL, *specific = NULL; |
| 5605 | int use_generic = 0; |
| 5606 | int offset = p->offset; |
| 5607 | void **ptr = slotptr(type, offset); |
| 5608 | |
| 5609 | if (ptr == NULL) { |
| 5610 | do { |
| 5611 | ++p; |
| 5612 | } while (p->offset == offset); |
| 5613 | return p; |
| 5614 | } |
| 5615 | do { |
| 5616 | descr = _PyType_Lookup(type, p->name_strobj); |
Amaury Forgeot d'Arc | f343e01 | 2009-01-12 23:58:21 +0000 | [diff] [blame] | 5617 | if (descr == NULL) { |
| 5618 | if (ptr == (void**)&type->tp_iternext) { |
| 5619 | specific = _PyObject_NextNotImplemented; |
| 5620 | } |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5621 | continue; |
Amaury Forgeot d'Arc | f343e01 | 2009-01-12 23:58:21 +0000 | [diff] [blame] | 5622 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5623 | if (Py_TYPE(descr) == &PyWrapperDescr_Type) { |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5624 | void **tptr = resolve_slotdups(type, p->name_strobj); |
| 5625 | if (tptr == NULL || tptr == ptr) |
| 5626 | generic = p->function; |
| 5627 | d = (PyWrapperDescrObject *)descr; |
| 5628 | if (d->d_base->wrapper == p->wrapper && |
Alexandre Vassalotti | 2db046d | 2009-07-22 03:56:36 +0000 | [diff] [blame] | 5629 | PyType_IsSubtype(type, PyDescr_TYPE(d))) |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5630 | { |
| 5631 | if (specific == NULL || |
| 5632 | specific == d->d_wrapped) |
| 5633 | specific = d->d_wrapped; |
| 5634 | else |
| 5635 | use_generic = 1; |
| 5636 | } |
| 5637 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5638 | else if (Py_TYPE(descr) == &PyCFunction_Type && |
Guido van Rossum | 721f62e | 2002-08-09 02:14:34 +0000 | [diff] [blame] | 5639 | PyCFunction_GET_FUNCTION(descr) == |
| 5640 | (PyCFunction)tp_new_wrapper && |
Benjamin Peterson | b547979 | 2009-01-18 22:10:38 +0000 | [diff] [blame] | 5641 | ptr == (void**)&type->tp_new) |
Guido van Rossum | 721f62e | 2002-08-09 02:14:34 +0000 | [diff] [blame] | 5642 | { |
| 5643 | /* The __new__ wrapper is not a wrapper descriptor, |
| 5644 | so must be special-cased differently. |
| 5645 | If we don't do this, creating an instance will |
| 5646 | always use slot_tp_new which will look up |
| 5647 | __new__ in the MRO which will call tp_new_wrapper |
| 5648 | which will look through the base classes looking |
| 5649 | for a static base and call its tp_new (usually |
| 5650 | PyType_GenericNew), after performing various |
| 5651 | sanity checks and constructing a new argument |
| 5652 | list. Cut all that nonsense short -- this speeds |
| 5653 | up instance creation tremendously. */ |
Martin v. Löwis | a94568a | 2003-05-10 07:36:56 +0000 | [diff] [blame] | 5654 | specific = (void *)type->tp_new; |
Guido van Rossum | 721f62e | 2002-08-09 02:14:34 +0000 | [diff] [blame] | 5655 | /* XXX I'm not 100% sure that there isn't a hole |
| 5656 | in this reasoning that requires additional |
| 5657 | sanity checks. I'll buy the first person to |
| 5658 | point out a bug in this reasoning a beer. */ |
| 5659 | } |
Nick Coghlan | d1abd25 | 2008-07-15 15:46:38 +0000 | [diff] [blame] | 5660 | else if (descr == Py_None && |
Benjamin Peterson | b547979 | 2009-01-18 22:10:38 +0000 | [diff] [blame] | 5661 | ptr == (void**)&type->tp_hash) { |
Nick Coghlan | d1abd25 | 2008-07-15 15:46:38 +0000 | [diff] [blame] | 5662 | /* We specifically allow __hash__ to be set to None |
| 5663 | to prevent inheritance of the default |
| 5664 | implementation from object.__hash__ */ |
| 5665 | specific = PyObject_HashNotImplemented; |
| 5666 | } |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5667 | else { |
| 5668 | use_generic = 1; |
| 5669 | generic = p->function; |
| 5670 | } |
| 5671 | } while ((++p)->offset == offset); |
| 5672 | if (specific && !use_generic) |
| 5673 | *ptr = specific; |
| 5674 | else |
| 5675 | *ptr = generic; |
| 5676 | return p; |
| 5677 | } |
| 5678 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5679 | /* In the type, update the slots whose slotdefs are gathered in the pp array. |
| 5680 | This is a callback for update_subclasses(). */ |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5681 | static int |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5682 | update_slots_callback(PyTypeObject *type, void *data) |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5683 | { |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5684 | slotdef **pp = (slotdef **)data; |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5685 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5686 | for (; *pp; pp++) |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5687 | update_one_slot(type, *pp); |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5688 | return 0; |
| 5689 | } |
| 5690 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5691 | /* Comparison function for qsort() to compare slotdefs by their offset, and |
| 5692 | for equal offset by their address (to force a stable sort). */ |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5693 | static int |
| 5694 | slotdef_cmp(const void *aa, const void *bb) |
| 5695 | { |
| 5696 | const slotdef *a = (const slotdef *)aa, *b = (const slotdef *)bb; |
| 5697 | int c = a->offset - b->offset; |
| 5698 | if (c != 0) |
| 5699 | return c; |
| 5700 | else |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5701 | /* Cannot use a-b, as this gives off_t, |
| 5702 | which may lose precision when converted to int. */ |
| 5703 | return (a > b) ? 1 : (a < b) ? -1 : 0; |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5704 | } |
| 5705 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5706 | /* Initialize the slotdefs table by adding interned string objects for the |
| 5707 | names and sorting the entries. */ |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5708 | static void |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5709 | init_slotdefs(void) |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5710 | { |
| 5711 | slotdef *p; |
| 5712 | static int initialized = 0; |
| 5713 | |
| 5714 | if (initialized) |
| 5715 | return; |
| 5716 | for (p = slotdefs; p->name; p++) { |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 5717 | p->name_strobj = PyUnicode_InternFromString(p->name); |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5718 | if (!p->name_strobj) |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5719 | Py_FatalError("Out of memory interning slotdef names"); |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5720 | } |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5721 | qsort((void *)slotdefs, (size_t)(p-slotdefs), sizeof(slotdef), |
| 5722 | slotdef_cmp); |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5723 | initialized = 1; |
| 5724 | } |
| 5725 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5726 | /* Update the slots after assignment to a class (type) attribute. */ |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5727 | static int |
| 5728 | update_slot(PyTypeObject *type, PyObject *name) |
| 5729 | { |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5730 | slotdef *ptrs[MAX_EQUIV]; |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5731 | slotdef *p; |
| 5732 | slotdef **pp; |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5733 | int offset; |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5734 | |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 5735 | /* Clear the VALID_VERSION flag of 'type' and all its |
| 5736 | subclasses. This could possibly be unified with the |
| 5737 | update_subclasses() recursion below, but carefully: |
| 5738 | they each have their own conditions on which to stop |
| 5739 | recursing into subclasses. */ |
Georg Brandl | f08a9dd | 2008-06-10 16:57:31 +0000 | [diff] [blame] | 5740 | PyType_Modified(type); |
Christian Heimes | a62da1d | 2008-01-12 19:39:10 +0000 | [diff] [blame] | 5741 | |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5742 | init_slotdefs(); |
| 5743 | pp = ptrs; |
| 5744 | for (p = slotdefs; p->name; p++) { |
| 5745 | /* XXX assume name is interned! */ |
| 5746 | if (p->name_strobj == name) |
| 5747 | *pp++ = p; |
| 5748 | } |
| 5749 | *pp = NULL; |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5750 | for (pp = ptrs; *pp; pp++) { |
| 5751 | p = *pp; |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5752 | offset = p->offset; |
| 5753 | while (p > slotdefs && (p-1)->offset == offset) |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5754 | --p; |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5755 | *pp = p; |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5756 | } |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5757 | if (ptrs[0] == NULL) |
| 5758 | return 0; /* Not an attribute that affects any slots */ |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5759 | return update_subclasses(type, name, |
| 5760 | update_slots_callback, (void *)ptrs); |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5761 | } |
| 5762 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5763 | /* Store the proper functions in the slot dispatches at class (type) |
| 5764 | definition time, based upon which operations the class overrides in its |
| 5765 | dict. */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5766 | static void |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5767 | fixup_slot_dispatchers(PyTypeObject *type) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5768 | { |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5769 | slotdef *p; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5770 | |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5771 | init_slotdefs(); |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5772 | for (p = slotdefs; p->name; ) |
| 5773 | p = update_one_slot(type, p); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5774 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5775 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 5776 | static void |
| 5777 | update_all_slots(PyTypeObject* type) |
| 5778 | { |
| 5779 | slotdef *p; |
| 5780 | |
| 5781 | init_slotdefs(); |
| 5782 | for (p = slotdefs; p->name; p++) { |
| 5783 | /* update_slot returns int but can't actually fail */ |
| 5784 | update_slot(type, p->name_strobj); |
| 5785 | } |
| 5786 | } |
| 5787 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5788 | /* recurse_down_subclasses() and update_subclasses() are mutually |
| 5789 | recursive functions to call a callback for all subclasses, |
| 5790 | but refraining from recursing into subclasses that define 'name'. */ |
| 5791 | |
| 5792 | static int |
| 5793 | update_subclasses(PyTypeObject *type, PyObject *name, |
| 5794 | update_callback callback, void *data) |
| 5795 | { |
| 5796 | if (callback(type, data) < 0) |
| 5797 | return -1; |
| 5798 | return recurse_down_subclasses(type, name, callback, data); |
| 5799 | } |
| 5800 | |
| 5801 | static int |
| 5802 | recurse_down_subclasses(PyTypeObject *type, PyObject *name, |
| 5803 | update_callback callback, void *data) |
| 5804 | { |
| 5805 | PyTypeObject *subclass; |
| 5806 | PyObject *ref, *subclasses, *dict; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5807 | Py_ssize_t i, n; |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5808 | |
| 5809 | subclasses = type->tp_subclasses; |
| 5810 | if (subclasses == NULL) |
| 5811 | return 0; |
| 5812 | assert(PyList_Check(subclasses)); |
| 5813 | n = PyList_GET_SIZE(subclasses); |
| 5814 | for (i = 0; i < n; i++) { |
| 5815 | ref = PyList_GET_ITEM(subclasses, i); |
| 5816 | assert(PyWeakref_CheckRef(ref)); |
| 5817 | subclass = (PyTypeObject *)PyWeakref_GET_OBJECT(ref); |
| 5818 | assert(subclass != NULL); |
| 5819 | if ((PyObject *)subclass == Py_None) |
| 5820 | continue; |
| 5821 | assert(PyType_Check(subclass)); |
| 5822 | /* Avoid recursing down into unaffected classes */ |
| 5823 | dict = subclass->tp_dict; |
| 5824 | if (dict != NULL && PyDict_Check(dict) && |
| 5825 | PyDict_GetItem(dict, name) != NULL) |
| 5826 | continue; |
| 5827 | if (update_subclasses(subclass, name, callback, data) < 0) |
| 5828 | return -1; |
| 5829 | } |
| 5830 | return 0; |
| 5831 | } |
| 5832 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5833 | /* This function is called by PyType_Ready() to populate the type's |
| 5834 | dictionary with method descriptors for function slots. For each |
Guido van Rossum | 09638c1 | 2002-06-13 19:17:46 +0000 | [diff] [blame] | 5835 | function slot (like tp_repr) that's defined in the type, one or more |
| 5836 | corresponding descriptors are added in the type's tp_dict dictionary |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 5837 | under the appropriate name (like __repr__). Some function slots |
Guido van Rossum | 09638c1 | 2002-06-13 19:17:46 +0000 | [diff] [blame] | 5838 | cause more than one descriptor to be added (for example, the nb_add |
| 5839 | slot adds both __add__ and __radd__ descriptors) and some function |
| 5840 | slots compete for the same descriptor (for example both sq_item and |
| 5841 | mp_subscript generate a __getitem__ descriptor). |
| 5842 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 5843 | In the latter case, the first slotdef entry encoutered wins. Since |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 5844 | slotdef entries are sorted by the offset of the slot in the |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5845 | PyHeapTypeObject, this gives us some control over disambiguating |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5846 | between competing slots: the members of PyHeapTypeObject are listed |
| 5847 | from most general to least general, so the most general slot is |
| 5848 | preferred. In particular, because as_mapping comes before as_sequence, |
| 5849 | for a type that defines both mp_subscript and sq_item, mp_subscript |
| 5850 | wins. |
Guido van Rossum | 09638c1 | 2002-06-13 19:17:46 +0000 | [diff] [blame] | 5851 | |
| 5852 | This only adds new descriptors and doesn't overwrite entries in |
| 5853 | tp_dict that were previously defined. The descriptors contain a |
| 5854 | reference to the C function they must call, so that it's safe if they |
| 5855 | are copied into a subtype's __dict__ and the subtype has a different |
| 5856 | C function in its slot -- calling the method defined by the |
| 5857 | descriptor will call the C function that was used to create it, |
| 5858 | rather than the C function present in the slot when it is called. |
| 5859 | (This is important because a subtype may have a C function in the |
| 5860 | slot that calls the method from the dictionary, and we want to avoid |
| 5861 | infinite recursion here.) */ |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5862 | |
| 5863 | static int |
| 5864 | add_operators(PyTypeObject *type) |
| 5865 | { |
| 5866 | PyObject *dict = type->tp_dict; |
| 5867 | slotdef *p; |
| 5868 | PyObject *descr; |
| 5869 | void **ptr; |
| 5870 | |
| 5871 | init_slotdefs(); |
| 5872 | for (p = slotdefs; p->name; p++) { |
| 5873 | if (p->wrapper == NULL) |
| 5874 | continue; |
| 5875 | ptr = slotptr(type, p->offset); |
| 5876 | if (!ptr || !*ptr) |
| 5877 | continue; |
| 5878 | if (PyDict_GetItem(dict, p->name_strobj)) |
| 5879 | continue; |
Nick Coghlan | d1abd25 | 2008-07-15 15:46:38 +0000 | [diff] [blame] | 5880 | if (*ptr == PyObject_HashNotImplemented) { |
| 5881 | /* Classes may prevent the inheritance of the tp_hash |
| 5882 | slot by storing PyObject_HashNotImplemented in it. Make it |
| 5883 | visible as a None value for the __hash__ attribute. */ |
| 5884 | if (PyDict_SetItem(dict, p->name_strobj, Py_None) < 0) |
| 5885 | return -1; |
| 5886 | } |
| 5887 | else { |
| 5888 | descr = PyDescr_NewWrapper(type, p, *ptr); |
| 5889 | if (descr == NULL) |
| 5890 | return -1; |
| 5891 | if (PyDict_SetItem(dict, p->name_strobj, descr) < 0) |
| 5892 | return -1; |
| 5893 | Py_DECREF(descr); |
| 5894 | } |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5895 | } |
| 5896 | if (type->tp_new != NULL) { |
| 5897 | if (add_tp_new_wrapper(type) < 0) |
| 5898 | return -1; |
| 5899 | } |
| 5900 | return 0; |
| 5901 | } |
| 5902 | |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5903 | |
| 5904 | /* Cooperative 'super' */ |
| 5905 | |
| 5906 | typedef struct { |
| 5907 | PyObject_HEAD |
Guido van Rossum | e705ef1 | 2001-08-29 15:47:06 +0000 | [diff] [blame] | 5908 | PyTypeObject *type; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5909 | PyObject *obj; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 5910 | PyTypeObject *obj_type; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5911 | } superobject; |
| 5912 | |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 5913 | static PyMemberDef super_members[] = { |
| 5914 | {"__thisclass__", T_OBJECT, offsetof(superobject, type), READONLY, |
| 5915 | "the class invoking super()"}, |
| 5916 | {"__self__", T_OBJECT, offsetof(superobject, obj), READONLY, |
| 5917 | "the instance invoking super(); may be None"}, |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 5918 | {"__self_class__", T_OBJECT, offsetof(superobject, obj_type), READONLY, |
Walter Dörwald | f0dfc7a | 2003-10-20 14:01:56 +0000 | [diff] [blame] | 5919 | "the type of the instance invoking super(); may be None"}, |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 5920 | {0} |
| 5921 | }; |
| 5922 | |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5923 | static void |
| 5924 | super_dealloc(PyObject *self) |
| 5925 | { |
| 5926 | superobject *su = (superobject *)self; |
| 5927 | |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 5928 | _PyObject_GC_UNTRACK(self); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5929 | Py_XDECREF(su->obj); |
| 5930 | Py_XDECREF(su->type); |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 5931 | Py_XDECREF(su->obj_type); |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5932 | Py_TYPE(self)->tp_free(self); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5933 | } |
| 5934 | |
| 5935 | static PyObject * |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 5936 | super_repr(PyObject *self) |
| 5937 | { |
| 5938 | superobject *su = (superobject *)self; |
| 5939 | |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 5940 | if (su->obj_type) |
Walter Dörwald | 1ab8330 | 2007-05-18 17:15:44 +0000 | [diff] [blame] | 5941 | return PyUnicode_FromFormat( |
Guido van Rossum | a4cb788 | 2001-09-25 03:56:29 +0000 | [diff] [blame] | 5942 | "<super: <class '%s'>, <%s object>>", |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 5943 | su->type ? su->type->tp_name : "NULL", |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 5944 | su->obj_type->tp_name); |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 5945 | else |
Walter Dörwald | 1ab8330 | 2007-05-18 17:15:44 +0000 | [diff] [blame] | 5946 | return PyUnicode_FromFormat( |
Guido van Rossum | a4cb788 | 2001-09-25 03:56:29 +0000 | [diff] [blame] | 5947 | "<super: <class '%s'>, NULL>", |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 5948 | su->type ? su->type->tp_name : "NULL"); |
| 5949 | } |
| 5950 | |
| 5951 | static PyObject * |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5952 | super_getattro(PyObject *self, PyObject *name) |
| 5953 | { |
| 5954 | superobject *su = (superobject *)self; |
Guido van Rossum | 76ba09f | 2003-04-16 19:40:58 +0000 | [diff] [blame] | 5955 | int skip = su->obj_type == NULL; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5956 | |
Guido van Rossum | 76ba09f | 2003-04-16 19:40:58 +0000 | [diff] [blame] | 5957 | if (!skip) { |
| 5958 | /* We want __class__ to return the class of the super object |
| 5959 | (i.e. super, or a subclass), not the class of su->obj. */ |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 5960 | skip = (PyUnicode_Check(name) && |
| 5961 | PyUnicode_GET_SIZE(name) == 9 && |
| 5962 | PyUnicode_CompareWithASCIIString(name, "__class__") == 0); |
Guido van Rossum | 76ba09f | 2003-04-16 19:40:58 +0000 | [diff] [blame] | 5963 | } |
| 5964 | |
| 5965 | if (!skip) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 5966 | PyObject *mro, *res, *tmp, *dict; |
Guido van Rossum | 155db9a | 2002-04-02 17:53:47 +0000 | [diff] [blame] | 5967 | PyTypeObject *starttype; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5968 | descrgetfunc f; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5969 | Py_ssize_t i, n; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5970 | |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 5971 | starttype = su->obj_type; |
Guido van Rossum | 155db9a | 2002-04-02 17:53:47 +0000 | [diff] [blame] | 5972 | mro = starttype->tp_mro; |
| 5973 | |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 5974 | if (mro == NULL) |
| 5975 | n = 0; |
| 5976 | else { |
| 5977 | assert(PyTuple_Check(mro)); |
| 5978 | n = PyTuple_GET_SIZE(mro); |
| 5979 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5980 | for (i = 0; i < n; i++) { |
Guido van Rossum | e705ef1 | 2001-08-29 15:47:06 +0000 | [diff] [blame] | 5981 | if ((PyObject *)(su->type) == PyTuple_GET_ITEM(mro, i)) |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5982 | break; |
| 5983 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5984 | i++; |
| 5985 | res = NULL; |
| 5986 | for (; i < n; i++) { |
| 5987 | tmp = PyTuple_GET_ITEM(mro, i); |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 5988 | if (PyType_Check(tmp)) |
| 5989 | dict = ((PyTypeObject *)tmp)->tp_dict; |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 5990 | else |
| 5991 | continue; |
| 5992 | res = PyDict_GetItem(dict, name); |
Guido van Rossum | 6cc5bb6 | 2003-04-16 20:01:36 +0000 | [diff] [blame] | 5993 | if (res != NULL) { |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5994 | Py_INCREF(res); |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 5995 | f = Py_TYPE(res)->tp_descr_get; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5996 | if (f != NULL) { |
Phillip J. Eby | 91a968a | 2004-03-25 02:19:34 +0000 | [diff] [blame] | 5997 | tmp = f(res, |
| 5998 | /* Only pass 'obj' param if |
| 5999 | this is instance-mode super |
| 6000 | (See SF ID #743627) |
| 6001 | */ |
Hye-Shik Chang | ff365c9 | 2004-03-25 16:37:03 +0000 | [diff] [blame] | 6002 | (su->obj == (PyObject *) |
| 6003 | su->obj_type |
Phillip J. Eby | 91a968a | 2004-03-25 02:19:34 +0000 | [diff] [blame] | 6004 | ? (PyObject *)NULL |
| 6005 | : su->obj), |
Guido van Rossum | d464107 | 2002-04-03 02:13:37 +0000 | [diff] [blame] | 6006 | (PyObject *)starttype); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6007 | Py_DECREF(res); |
| 6008 | res = tmp; |
| 6009 | } |
| 6010 | return res; |
| 6011 | } |
| 6012 | } |
| 6013 | } |
| 6014 | return PyObject_GenericGetAttr(self, name); |
| 6015 | } |
| 6016 | |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6017 | static PyTypeObject * |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6018 | supercheck(PyTypeObject *type, PyObject *obj) |
| 6019 | { |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6020 | /* Check that a super() call makes sense. Return a type object. |
| 6021 | |
| 6022 | obj can be a new-style class, or an instance of one: |
| 6023 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 6024 | - If it is a class, it must be a subclass of 'type'. This case is |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6025 | used for class methods; the return value is obj. |
| 6026 | |
| 6027 | - If it is an instance, it must be an instance of 'type'. This is |
| 6028 | the normal case; the return value is obj.__class__. |
| 6029 | |
| 6030 | But... when obj is an instance, we want to allow for the case where |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 6031 | Py_TYPE(obj) is not a subclass of type, but obj.__class__ is! |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6032 | This will allow using super() with a proxy for obj. |
| 6033 | */ |
| 6034 | |
Guido van Rossum | 8e80a72 | 2003-02-18 19:22:22 +0000 | [diff] [blame] | 6035 | /* Check for first bullet above (special case) */ |
| 6036 | if (PyType_Check(obj) && PyType_IsSubtype((PyTypeObject *)obj, type)) { |
| 6037 | Py_INCREF(obj); |
| 6038 | return (PyTypeObject *)obj; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6039 | } |
Guido van Rossum | 8e80a72 | 2003-02-18 19:22:22 +0000 | [diff] [blame] | 6040 | |
| 6041 | /* Normal case */ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 6042 | if (PyType_IsSubtype(Py_TYPE(obj), type)) { |
| 6043 | Py_INCREF(Py_TYPE(obj)); |
| 6044 | return Py_TYPE(obj); |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6045 | } |
| 6046 | else { |
| 6047 | /* Try the slow way */ |
| 6048 | static PyObject *class_str = NULL; |
| 6049 | PyObject *class_attr; |
| 6050 | |
| 6051 | if (class_str == NULL) { |
Martin v. Löwis | 5b22213 | 2007-06-10 09:51:05 +0000 | [diff] [blame] | 6052 | class_str = PyUnicode_FromString("__class__"); |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6053 | if (class_str == NULL) |
| 6054 | return NULL; |
| 6055 | } |
| 6056 | |
| 6057 | class_attr = PyObject_GetAttr(obj, class_str); |
| 6058 | |
| 6059 | if (class_attr != NULL && |
| 6060 | PyType_Check(class_attr) && |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 6061 | (PyTypeObject *)class_attr != Py_TYPE(obj)) |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6062 | { |
| 6063 | int ok = PyType_IsSubtype( |
| 6064 | (PyTypeObject *)class_attr, type); |
| 6065 | if (ok) |
| 6066 | return (PyTypeObject *)class_attr; |
| 6067 | } |
| 6068 | |
| 6069 | if (class_attr == NULL) |
| 6070 | PyErr_Clear(); |
| 6071 | else |
| 6072 | Py_DECREF(class_attr); |
| 6073 | } |
| 6074 | |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 6075 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6076 | "super(type, obj): " |
| 6077 | "obj must be an instance or subtype of type"); |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6078 | return NULL; |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6079 | } |
| 6080 | |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6081 | static PyObject * |
| 6082 | super_descr_get(PyObject *self, PyObject *obj, PyObject *type) |
| 6083 | { |
| 6084 | superobject *su = (superobject *)self; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 6085 | superobject *newobj; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6086 | |
| 6087 | if (obj == NULL || obj == Py_None || su->obj != NULL) { |
| 6088 | /* Not binding to an object, or already bound */ |
| 6089 | Py_INCREF(self); |
| 6090 | return self; |
| 6091 | } |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 6092 | if (Py_TYPE(su) != &PySuper_Type) |
Armin Rigo | 7726dc0 | 2005-05-15 15:32:08 +0000 | [diff] [blame] | 6093 | /* If su is an instance of a (strict) subclass of super, |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6094 | call its type */ |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 6095 | return PyObject_CallFunctionObjArgs((PyObject *)Py_TYPE(su), |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 6096 | su->type, obj, NULL); |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6097 | else { |
| 6098 | /* Inline the common case */ |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6099 | PyTypeObject *obj_type = supercheck(su->type, obj); |
| 6100 | if (obj_type == NULL) |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6101 | return NULL; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 6102 | newobj = (superobject *)PySuper_Type.tp_new(&PySuper_Type, |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6103 | NULL, NULL); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 6104 | if (newobj == NULL) |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6105 | return NULL; |
| 6106 | Py_INCREF(su->type); |
| 6107 | Py_INCREF(obj); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 6108 | newobj->type = su->type; |
| 6109 | newobj->obj = obj; |
| 6110 | newobj->obj_type = obj_type; |
| 6111 | return (PyObject *)newobj; |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6112 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6113 | } |
| 6114 | |
| 6115 | static int |
| 6116 | super_init(PyObject *self, PyObject *args, PyObject *kwds) |
| 6117 | { |
| 6118 | superobject *su = (superobject *)self; |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 6119 | PyTypeObject *type = NULL; |
Guido van Rossum | e705ef1 | 2001-08-29 15:47:06 +0000 | [diff] [blame] | 6120 | PyObject *obj = NULL; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6121 | PyTypeObject *obj_type = NULL; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6122 | |
Thomas Wouters | 89f507f | 2006-12-13 04:49:30 +0000 | [diff] [blame] | 6123 | if (!_PyArg_NoKeywords("super", kwds)) |
| 6124 | return -1; |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 6125 | if (!PyArg_ParseTuple(args, "|O!O:super", &PyType_Type, &type, &obj)) |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6126 | return -1; |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 6127 | |
| 6128 | if (type == NULL) { |
| 6129 | /* Call super(), without args -- fill in from __class__ |
| 6130 | and first local variable on the stack. */ |
| 6131 | PyFrameObject *f = PyThreadState_GET()->frame; |
| 6132 | PyCodeObject *co = f->f_code; |
| 6133 | int i, n; |
| 6134 | if (co == NULL) { |
| 6135 | PyErr_SetString(PyExc_SystemError, |
| 6136 | "super(): no code object"); |
| 6137 | return -1; |
| 6138 | } |
| 6139 | if (co->co_argcount == 0) { |
| 6140 | PyErr_SetString(PyExc_SystemError, |
| 6141 | "super(): no arguments"); |
| 6142 | return -1; |
| 6143 | } |
| 6144 | obj = f->f_localsplus[0]; |
| 6145 | if (obj == NULL) { |
| 6146 | PyErr_SetString(PyExc_SystemError, |
| 6147 | "super(): arg[0] deleted"); |
| 6148 | return -1; |
| 6149 | } |
| 6150 | if (co->co_freevars == NULL) |
| 6151 | n = 0; |
| 6152 | else { |
| 6153 | assert(PyTuple_Check(co->co_freevars)); |
| 6154 | n = PyTuple_GET_SIZE(co->co_freevars); |
| 6155 | } |
| 6156 | for (i = 0; i < n; i++) { |
| 6157 | PyObject *name = PyTuple_GET_ITEM(co->co_freevars, i); |
| 6158 | assert(PyUnicode_Check(name)); |
| 6159 | if (!PyUnicode_CompareWithASCIIString(name, |
| 6160 | "__class__")) { |
Barry Warsaw | 91cc8fb | 2008-11-20 20:01:57 +0000 | [diff] [blame] | 6161 | Py_ssize_t index = co->co_nlocals + |
| 6162 | PyTuple_GET_SIZE(co->co_cellvars) + i; |
| 6163 | PyObject *cell = f->f_localsplus[index]; |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 6164 | if (cell == NULL || !PyCell_Check(cell)) { |
| 6165 | PyErr_SetString(PyExc_SystemError, |
| 6166 | "super(): bad __class__ cell"); |
| 6167 | return -1; |
| 6168 | } |
| 6169 | type = (PyTypeObject *) PyCell_GET(cell); |
| 6170 | if (type == NULL) { |
| 6171 | PyErr_SetString(PyExc_SystemError, |
| 6172 | "super(): empty __class__ cell"); |
| 6173 | return -1; |
| 6174 | } |
| 6175 | if (!PyType_Check(type)) { |
| 6176 | PyErr_Format(PyExc_SystemError, |
| 6177 | "super(): __class__ is not a type (%s)", |
Christian Heimes | 90aa764 | 2007-12-19 02:45:37 +0000 | [diff] [blame] | 6178 | Py_TYPE(type)->tp_name); |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 6179 | return -1; |
| 6180 | } |
| 6181 | break; |
| 6182 | } |
| 6183 | } |
| 6184 | if (type == NULL) { |
| 6185 | PyErr_SetString(PyExc_SystemError, |
| 6186 | "super(): __class__ cell not found"); |
| 6187 | return -1; |
| 6188 | } |
| 6189 | } |
| 6190 | |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6191 | if (obj == Py_None) |
| 6192 | obj = NULL; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6193 | if (obj != NULL) { |
| 6194 | obj_type = supercheck(type, obj); |
| 6195 | if (obj_type == NULL) |
| 6196 | return -1; |
| 6197 | Py_INCREF(obj); |
| 6198 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6199 | Py_INCREF(type); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6200 | su->type = type; |
| 6201 | su->obj = obj; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6202 | su->obj_type = obj_type; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6203 | return 0; |
| 6204 | } |
| 6205 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 6206 | PyDoc_STRVAR(super_doc, |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 6207 | "super() -> same as super(__class__, <first argument>)\n" |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6208 | "super(type) -> unbound super object\n" |
| 6209 | "super(type, obj) -> bound super object; requires isinstance(obj, type)\n" |
Guido van Rossum | e705ef1 | 2001-08-29 15:47:06 +0000 | [diff] [blame] | 6210 | "super(type, type2) -> bound super object; requires issubclass(type2, type)\n" |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6211 | "Typical use to call a cooperative superclass method:\n" |
| 6212 | "class C(B):\n" |
| 6213 | " def meth(self, arg):\n" |
Guido van Rossum | cd16bf6 | 2007-06-13 18:07:49 +0000 | [diff] [blame] | 6214 | " super().meth(arg)\n" |
| 6215 | "This works for class methods too:\n" |
| 6216 | "class C(B):\n" |
| 6217 | " @classmethod\n" |
| 6218 | " def cmeth(cls, arg):\n" |
| 6219 | " super().cmeth(arg)\n"); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6220 | |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 6221 | static int |
| 6222 | super_traverse(PyObject *self, visitproc visit, void *arg) |
| 6223 | { |
| 6224 | superobject *su = (superobject *)self; |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 6225 | |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 6226 | Py_VISIT(su->obj); |
| 6227 | Py_VISIT(su->type); |
| 6228 | Py_VISIT(su->obj_type); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 6229 | |
| 6230 | return 0; |
| 6231 | } |
| 6232 | |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6233 | PyTypeObject PySuper_Type = { |
Martin v. Löwis | 9f2e346 | 2007-07-21 17:22:18 +0000 | [diff] [blame] | 6234 | PyVarObject_HEAD_INIT(&PyType_Type, 0) |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6235 | "super", /* tp_name */ |
| 6236 | sizeof(superobject), /* tp_basicsize */ |
| 6237 | 0, /* tp_itemsize */ |
| 6238 | /* methods */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 6239 | super_dealloc, /* tp_dealloc */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6240 | 0, /* tp_print */ |
| 6241 | 0, /* tp_getattr */ |
| 6242 | 0, /* tp_setattr */ |
Mark Dickinson | e94c679 | 2009-02-02 20:36:42 +0000 | [diff] [blame] | 6243 | 0, /* tp_reserved */ |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6244 | super_repr, /* tp_repr */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6245 | 0, /* tp_as_number */ |
| 6246 | 0, /* tp_as_sequence */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 6247 | 0, /* tp_as_mapping */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6248 | 0, /* tp_hash */ |
| 6249 | 0, /* tp_call */ |
| 6250 | 0, /* tp_str */ |
| 6251 | super_getattro, /* tp_getattro */ |
| 6252 | 0, /* tp_setattro */ |
| 6253 | 0, /* tp_as_buffer */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 6254 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 6255 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 6256 | super_doc, /* tp_doc */ |
| 6257 | super_traverse, /* tp_traverse */ |
| 6258 | 0, /* tp_clear */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6259 | 0, /* tp_richcompare */ |
| 6260 | 0, /* tp_weaklistoffset */ |
| 6261 | 0, /* tp_iter */ |
| 6262 | 0, /* tp_iternext */ |
| 6263 | 0, /* tp_methods */ |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6264 | super_members, /* tp_members */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6265 | 0, /* tp_getset */ |
| 6266 | 0, /* tp_base */ |
| 6267 | 0, /* tp_dict */ |
| 6268 | super_descr_get, /* tp_descr_get */ |
| 6269 | 0, /* tp_descr_set */ |
| 6270 | 0, /* tp_dictoffset */ |
| 6271 | super_init, /* tp_init */ |
| 6272 | PyType_GenericAlloc, /* tp_alloc */ |
| 6273 | PyType_GenericNew, /* tp_new */ |
Guido van Rossum | d8faa36 | 2007-04-27 19:54:29 +0000 | [diff] [blame] | 6274 | PyObject_GC_Del, /* tp_free */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6275 | }; |