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" |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4 | #include "structmember.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 5 | |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 6 | #include <ctype.h> |
| 7 | |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 8 | |
| 9 | /* Support type attribute cache */ |
| 10 | |
| 11 | /* The cache can keep references to the names alive for longer than |
| 12 | they normally would. This is why the maximum size is limited to |
| 13 | MCACHE_MAX_ATTR_SIZE, since it might be a problem if very large |
| 14 | strings are used as attribute names. */ |
| 15 | #define MCACHE_MAX_ATTR_SIZE 100 |
| 16 | #define MCACHE_SIZE_EXP 10 |
| 17 | #define MCACHE_HASH(version, name_hash) \ |
| 18 | (((unsigned int)(version) * (unsigned int)(name_hash)) \ |
| 19 | >> (8*sizeof(unsigned int) - MCACHE_SIZE_EXP)) |
| 20 | #define MCACHE_HASH_METHOD(type, name) \ |
| 21 | MCACHE_HASH((type)->tp_version_tag, \ |
| 22 | ((PyStringObject *)(name))->ob_shash) |
| 23 | #define MCACHE_CACHEABLE_NAME(name) \ |
| 24 | PyString_CheckExact(name) && \ |
| 25 | PyString_GET_SIZE(name) <= MCACHE_MAX_ATTR_SIZE |
| 26 | |
| 27 | struct method_cache_entry { |
| 28 | unsigned int version; |
| 29 | PyObject *name; /* reference to exactly a str or None */ |
| 30 | PyObject *value; /* borrowed */ |
| 31 | }; |
| 32 | |
| 33 | static struct method_cache_entry method_cache[1 << MCACHE_SIZE_EXP]; |
| 34 | static unsigned int next_version_tag = 0; |
| 35 | |
| 36 | static void |
| 37 | type_modified(PyTypeObject *type) |
| 38 | { |
| 39 | /* Invalidate any cached data for the specified type and all |
| 40 | subclasses. This function is called after the base |
| 41 | classes, mro, or attributes of the type are altered. |
| 42 | |
| 43 | Invariants: |
| 44 | |
| 45 | - Py_TPFLAGS_VALID_VERSION_TAG is never set if |
| 46 | Py_TPFLAGS_HAVE_VERSION_TAG is not set (e.g. on type |
| 47 | objects coming from non-recompiled extension modules) |
| 48 | |
| 49 | - before Py_TPFLAGS_VALID_VERSION_TAG can be set on a type, |
| 50 | it must first be set on all super types. |
| 51 | |
| 52 | This function clears the Py_TPFLAGS_VALID_VERSION_TAG of a |
| 53 | type (so it must first clear it on all subclasses). The |
| 54 | tp_version_tag value is meaningless unless this flag is set. |
| 55 | We don't assign new version tags eagerly, but only as |
| 56 | needed. |
| 57 | */ |
| 58 | PyObject *raw, *ref; |
| 59 | Py_ssize_t i, n; |
| 60 | |
Neal Norwitz | e7bb918 | 2008-01-27 17:10:14 +0000 | [diff] [blame^] | 61 | if (!PyType_HasFeature(type, Py_TPFLAGS_VALID_VERSION_TAG)) |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 62 | return; |
| 63 | |
| 64 | raw = type->tp_subclasses; |
| 65 | if (raw != NULL) { |
| 66 | n = PyList_GET_SIZE(raw); |
| 67 | for (i = 0; i < n; i++) { |
| 68 | ref = PyList_GET_ITEM(raw, i); |
| 69 | ref = PyWeakref_GET_OBJECT(ref); |
| 70 | if (ref != Py_None) { |
| 71 | type_modified((PyTypeObject *)ref); |
| 72 | } |
| 73 | } |
| 74 | } |
| 75 | type->tp_flags &= ~Py_TPFLAGS_VALID_VERSION_TAG; |
| 76 | } |
| 77 | |
| 78 | static void |
| 79 | type_mro_modified(PyTypeObject *type, PyObject *bases) { |
| 80 | /* |
| 81 | Check that all base classes or elements of the mro of type are |
| 82 | able to be cached. This function is called after the base |
| 83 | classes or mro of the type are altered. |
| 84 | |
| 85 | Unset HAVE_VERSION_TAG and VALID_VERSION_TAG if the type |
| 86 | inherits from an old-style class, either directly or if it |
| 87 | appears in the MRO of a new-style class. No support either for |
| 88 | custom MROs that include types that are not officially super |
| 89 | types. |
| 90 | |
| 91 | Called from mro_internal, which will subsequently be called on |
| 92 | each subclass when their mro is recursively updated. |
| 93 | */ |
| 94 | Py_ssize_t i, n; |
| 95 | int clear = 0; |
| 96 | |
Neal Norwitz | e7bb918 | 2008-01-27 17:10:14 +0000 | [diff] [blame^] | 97 | if (!PyType_HasFeature(type, Py_TPFLAGS_HAVE_VERSION_TAG)) |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 98 | return; |
| 99 | |
| 100 | n = PyTuple_GET_SIZE(bases); |
| 101 | for (i = 0; i < n; i++) { |
| 102 | PyObject *b = PyTuple_GET_ITEM(bases, i); |
| 103 | PyTypeObject *cls; |
| 104 | |
| 105 | if (!PyType_Check(b) ) { |
| 106 | clear = 1; |
| 107 | break; |
| 108 | } |
| 109 | |
| 110 | cls = (PyTypeObject *)b; |
| 111 | |
| 112 | if (!PyType_HasFeature(cls, Py_TPFLAGS_HAVE_VERSION_TAG) || |
| 113 | !PyType_IsSubtype(type, cls)) { |
| 114 | clear = 1; |
| 115 | break; |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | if (clear) |
| 120 | type->tp_flags &= ~(Py_TPFLAGS_HAVE_VERSION_TAG| |
| 121 | Py_TPFLAGS_VALID_VERSION_TAG); |
| 122 | } |
| 123 | |
| 124 | static int |
| 125 | assign_version_tag(PyTypeObject *type) |
| 126 | { |
| 127 | /* Ensure that the tp_version_tag is valid and set |
| 128 | Py_TPFLAGS_VALID_VERSION_TAG. To respect the invariant, this |
| 129 | must first be done on all super classes. Return 0 if this |
| 130 | cannot be done, 1 if Py_TPFLAGS_VALID_VERSION_TAG. |
| 131 | */ |
| 132 | Py_ssize_t i, n; |
| 133 | PyObject *bases; |
| 134 | |
| 135 | if (PyType_HasFeature(type, Py_TPFLAGS_VALID_VERSION_TAG)) |
| 136 | return 1; |
| 137 | if (!PyType_HasFeature(type, Py_TPFLAGS_HAVE_VERSION_TAG)) |
| 138 | return 0; |
| 139 | if (!PyType_HasFeature(type, Py_TPFLAGS_READY)) |
| 140 | return 0; |
| 141 | |
| 142 | type->tp_version_tag = next_version_tag++; |
| 143 | /* for stress-testing: next_version_tag &= 0xFF; */ |
| 144 | |
| 145 | if (type->tp_version_tag == 0) { |
| 146 | /* wrap-around or just starting Python - clear the whole |
| 147 | cache by filling names with references to Py_None. |
| 148 | Values are also set to NULL for added protection, as they |
| 149 | are borrowed reference */ |
| 150 | for (i = 0; i < (1 << MCACHE_SIZE_EXP); i++) { |
| 151 | method_cache[i].value = NULL; |
| 152 | Py_XDECREF(method_cache[i].name); |
| 153 | method_cache[i].name = Py_None; |
| 154 | Py_INCREF(Py_None); |
| 155 | } |
| 156 | /* mark all version tags as invalid */ |
| 157 | type_modified(&PyBaseObject_Type); |
| 158 | return 1; |
| 159 | } |
| 160 | bases = type->tp_bases; |
| 161 | n = PyTuple_GET_SIZE(bases); |
| 162 | for (i = 0; i < n; i++) { |
| 163 | PyObject *b = PyTuple_GET_ITEM(bases, i); |
| 164 | assert(PyType_Check(b)); |
| 165 | if (!assign_version_tag((PyTypeObject *)b)) |
| 166 | return 0; |
| 167 | } |
| 168 | type->tp_flags |= Py_TPFLAGS_VALID_VERSION_TAG; |
| 169 | return 1; |
| 170 | } |
| 171 | |
| 172 | |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 173 | static PyMemberDef type_members[] = { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 174 | {"__basicsize__", T_INT, offsetof(PyTypeObject,tp_basicsize),READONLY}, |
| 175 | {"__itemsize__", T_INT, offsetof(PyTypeObject, tp_itemsize), READONLY}, |
| 176 | {"__flags__", T_LONG, offsetof(PyTypeObject, tp_flags), READONLY}, |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 177 | {"__weakrefoffset__", T_LONG, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 178 | offsetof(PyTypeObject, tp_weaklistoffset), READONLY}, |
| 179 | {"__base__", T_OBJECT, offsetof(PyTypeObject, tp_base), READONLY}, |
| 180 | {"__dictoffset__", T_LONG, |
| 181 | offsetof(PyTypeObject, tp_dictoffset), READONLY}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 182 | {"__mro__", T_OBJECT, offsetof(PyTypeObject, tp_mro), READONLY}, |
| 183 | {0} |
| 184 | }; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 185 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 186 | static PyObject * |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 187 | type_name(PyTypeObject *type, void *context) |
| 188 | { |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 189 | const char *s; |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 190 | |
Michael W. Hudson | ade8c8b | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 191 | if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) { |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 192 | PyHeapTypeObject* et = (PyHeapTypeObject*)type; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 193 | |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 194 | Py_INCREF(et->ht_name); |
| 195 | return et->ht_name; |
Michael W. Hudson | ade8c8b | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 196 | } |
| 197 | else { |
| 198 | s = strrchr(type->tp_name, '.'); |
| 199 | if (s == NULL) |
| 200 | s = type->tp_name; |
| 201 | else |
| 202 | s++; |
| 203 | return PyString_FromString(s); |
| 204 | } |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 205 | } |
| 206 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 207 | static int |
| 208 | type_set_name(PyTypeObject *type, PyObject *value, void *context) |
| 209 | { |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 210 | PyHeapTypeObject* et; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 211 | |
| 212 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
| 213 | PyErr_Format(PyExc_TypeError, |
| 214 | "can't set %s.__name__", type->tp_name); |
| 215 | return -1; |
| 216 | } |
| 217 | if (!value) { |
| 218 | PyErr_Format(PyExc_TypeError, |
| 219 | "can't delete %s.__name__", type->tp_name); |
| 220 | return -1; |
| 221 | } |
| 222 | if (!PyString_Check(value)) { |
| 223 | PyErr_Format(PyExc_TypeError, |
| 224 | "can only assign string to %s.__name__, not '%s'", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 225 | type->tp_name, Py_TYPE(value)->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 226 | return -1; |
| 227 | } |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 228 | if (strlen(PyString_AS_STRING(value)) |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 229 | != (size_t)PyString_GET_SIZE(value)) { |
| 230 | PyErr_Format(PyExc_ValueError, |
| 231 | "__name__ must not contain null bytes"); |
| 232 | return -1; |
| 233 | } |
| 234 | |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 235 | et = (PyHeapTypeObject*)type; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 236 | |
| 237 | Py_INCREF(value); |
| 238 | |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 239 | Py_DECREF(et->ht_name); |
| 240 | et->ht_name = value; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 241 | |
| 242 | type->tp_name = PyString_AS_STRING(value); |
| 243 | |
| 244 | return 0; |
| 245 | } |
| 246 | |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 247 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 248 | type_module(PyTypeObject *type, void *context) |
Guido van Rossum | 29ca26e | 1995-01-07 11:58:15 +0000 | [diff] [blame] | 249 | { |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 250 | PyObject *mod; |
| 251 | char *s; |
| 252 | |
Michael W. Hudson | ade8c8b | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 253 | if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) { |
| 254 | mod = PyDict_GetItemString(type->tp_dict, "__module__"); |
Anthony Baxter | 3ecdb25 | 2004-06-11 14:41:18 +0000 | [diff] [blame] | 255 | if (!mod) { |
| 256 | PyErr_Format(PyExc_AttributeError, "__module__"); |
| 257 | return 0; |
| 258 | } |
Michael W. Hudson | ade8c8b | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 259 | Py_XINCREF(mod); |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 260 | return mod; |
| 261 | } |
Michael W. Hudson | ade8c8b | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 262 | else { |
| 263 | s = strrchr(type->tp_name, '.'); |
| 264 | if (s != NULL) |
| 265 | return PyString_FromStringAndSize( |
Armin Rigo | 7ccbca9 | 2006-10-04 12:17:45 +0000 | [diff] [blame] | 266 | type->tp_name, (Py_ssize_t)(s - type->tp_name)); |
Michael W. Hudson | ade8c8b | 2002-11-27 16:29:26 +0000 | [diff] [blame] | 267 | return PyString_FromString("__builtin__"); |
| 268 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 269 | } |
| 270 | |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 271 | static int |
| 272 | type_set_module(PyTypeObject *type, PyObject *value, void *context) |
| 273 | { |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 274 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 275 | PyErr_Format(PyExc_TypeError, |
| 276 | "can't set %s.__module__", type->tp_name); |
| 277 | return -1; |
| 278 | } |
| 279 | if (!value) { |
| 280 | PyErr_Format(PyExc_TypeError, |
| 281 | "can't delete %s.__module__", type->tp_name); |
| 282 | return -1; |
| 283 | } |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 284 | |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 285 | type_modified(type); |
| 286 | |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 287 | return PyDict_SetItemString(type->tp_dict, "__module__", value); |
| 288 | } |
| 289 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 290 | static PyObject * |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 291 | type_get_bases(PyTypeObject *type, void *context) |
| 292 | { |
| 293 | Py_INCREF(type->tp_bases); |
| 294 | return type->tp_bases; |
| 295 | } |
| 296 | |
| 297 | static PyTypeObject *best_base(PyObject *); |
| 298 | static int mro_internal(PyTypeObject *); |
| 299 | static int compatible_for_assignment(PyTypeObject *, PyTypeObject *, char *); |
| 300 | static int add_subclass(PyTypeObject*, PyTypeObject*); |
| 301 | static void remove_subclass(PyTypeObject *, PyTypeObject *); |
| 302 | static void update_all_slots(PyTypeObject *); |
| 303 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 304 | typedef int (*update_callback)(PyTypeObject *, void *); |
| 305 | static int update_subclasses(PyTypeObject *type, PyObject *name, |
| 306 | update_callback callback, void *data); |
| 307 | static int recurse_down_subclasses(PyTypeObject *type, PyObject *name, |
| 308 | update_callback callback, void *data); |
| 309 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 310 | static int |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 311 | mro_subclasses(PyTypeObject *type, PyObject* temp) |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 312 | { |
| 313 | PyTypeObject *subclass; |
| 314 | PyObject *ref, *subclasses, *old_mro; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 315 | Py_ssize_t i, n; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 316 | |
| 317 | subclasses = type->tp_subclasses; |
| 318 | if (subclasses == NULL) |
| 319 | return 0; |
| 320 | assert(PyList_Check(subclasses)); |
| 321 | n = PyList_GET_SIZE(subclasses); |
| 322 | for (i = 0; i < n; i++) { |
| 323 | ref = PyList_GET_ITEM(subclasses, i); |
| 324 | assert(PyWeakref_CheckRef(ref)); |
| 325 | subclass = (PyTypeObject *)PyWeakref_GET_OBJECT(ref); |
| 326 | assert(subclass != NULL); |
| 327 | if ((PyObject *)subclass == Py_None) |
| 328 | continue; |
| 329 | assert(PyType_Check(subclass)); |
| 330 | old_mro = subclass->tp_mro; |
| 331 | if (mro_internal(subclass) < 0) { |
| 332 | subclass->tp_mro = old_mro; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 333 | return -1; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 334 | } |
| 335 | else { |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 336 | PyObject* tuple; |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 337 | tuple = PyTuple_Pack(2, subclass, old_mro); |
Guido van Rossum | 19a02ba | 2003-04-15 22:09:45 +0000 | [diff] [blame] | 338 | Py_DECREF(old_mro); |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 339 | if (!tuple) |
| 340 | return -1; |
| 341 | if (PyList_Append(temp, tuple) < 0) |
| 342 | return -1; |
Guido van Rossum | 19a02ba | 2003-04-15 22:09:45 +0000 | [diff] [blame] | 343 | Py_DECREF(tuple); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 344 | } |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 345 | if (mro_subclasses(subclass, temp) < 0) |
| 346 | return -1; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 347 | } |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 348 | return 0; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | static int |
| 352 | type_set_bases(PyTypeObject *type, PyObject *value, void *context) |
| 353 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 354 | Py_ssize_t i; |
| 355 | int r = 0; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 356 | PyObject *ob, *temp; |
Armin Rigo | c0ba52d | 2007-04-19 14:44:48 +0000 | [diff] [blame] | 357 | PyTypeObject *new_base, *old_base; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 358 | PyObject *old_bases, *old_mro; |
| 359 | |
| 360 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
| 361 | PyErr_Format(PyExc_TypeError, |
| 362 | "can't set %s.__bases__", type->tp_name); |
| 363 | return -1; |
| 364 | } |
| 365 | if (!value) { |
| 366 | PyErr_Format(PyExc_TypeError, |
| 367 | "can't delete %s.__bases__", type->tp_name); |
| 368 | return -1; |
| 369 | } |
| 370 | if (!PyTuple_Check(value)) { |
| 371 | PyErr_Format(PyExc_TypeError, |
| 372 | "can only assign tuple to %s.__bases__, not %s", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 373 | type->tp_name, Py_TYPE(value)->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 374 | return -1; |
| 375 | } |
Guido van Rossum | 3bbc0ee | 2002-12-13 17:49:38 +0000 | [diff] [blame] | 376 | if (PyTuple_GET_SIZE(value) == 0) { |
| 377 | PyErr_Format(PyExc_TypeError, |
| 378 | "can only assign non-empty tuple to %s.__bases__, not ()", |
| 379 | type->tp_name); |
| 380 | return -1; |
| 381 | } |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 382 | for (i = 0; i < PyTuple_GET_SIZE(value); i++) { |
| 383 | ob = PyTuple_GET_ITEM(value, i); |
| 384 | if (!PyClass_Check(ob) && !PyType_Check(ob)) { |
| 385 | PyErr_Format( |
| 386 | PyExc_TypeError, |
| 387 | "%s.__bases__ must be tuple of old- or new-style classes, not '%s'", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 388 | type->tp_name, Py_TYPE(ob)->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 389 | return -1; |
| 390 | } |
Michael W. Hudson | caf17be | 2002-11-27 10:24:44 +0000 | [diff] [blame] | 391 | if (PyType_Check(ob)) { |
| 392 | if (PyType_IsSubtype((PyTypeObject*)ob, type)) { |
| 393 | PyErr_SetString(PyExc_TypeError, |
| 394 | "a __bases__ item causes an inheritance cycle"); |
| 395 | return -1; |
| 396 | } |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 397 | } |
| 398 | } |
| 399 | |
| 400 | new_base = best_base(value); |
| 401 | |
| 402 | if (!new_base) { |
| 403 | return -1; |
| 404 | } |
| 405 | |
| 406 | if (!compatible_for_assignment(type->tp_base, new_base, "__bases__")) |
| 407 | return -1; |
| 408 | |
| 409 | Py_INCREF(new_base); |
| 410 | Py_INCREF(value); |
| 411 | |
| 412 | old_bases = type->tp_bases; |
| 413 | old_base = type->tp_base; |
| 414 | old_mro = type->tp_mro; |
| 415 | |
| 416 | type->tp_bases = value; |
| 417 | type->tp_base = new_base; |
| 418 | |
| 419 | if (mro_internal(type) < 0) { |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 420 | goto bail; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 421 | } |
| 422 | |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 423 | temp = PyList_New(0); |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 424 | if (!temp) |
| 425 | goto bail; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 426 | |
| 427 | r = mro_subclasses(type, temp); |
| 428 | |
| 429 | if (r < 0) { |
| 430 | for (i = 0; i < PyList_Size(temp); i++) { |
| 431 | PyTypeObject* cls; |
| 432 | PyObject* mro; |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 433 | PyArg_UnpackTuple(PyList_GET_ITEM(temp, i), |
| 434 | "", 2, 2, &cls, &mro); |
Armin Rigo | 796fc99 | 2007-04-19 14:56:48 +0000 | [diff] [blame] | 435 | Py_INCREF(mro); |
| 436 | ob = cls->tp_mro; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 437 | cls->tp_mro = mro; |
Armin Rigo | 796fc99 | 2007-04-19 14:56:48 +0000 | [diff] [blame] | 438 | Py_DECREF(ob); |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 439 | } |
| 440 | Py_DECREF(temp); |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 441 | goto bail; |
Michael W. Hudson | 586da8f | 2002-11-27 15:20:19 +0000 | [diff] [blame] | 442 | } |
| 443 | |
| 444 | Py_DECREF(temp); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 445 | |
| 446 | /* any base that was in __bases__ but now isn't, we |
Raymond Hettinger | a828586 | 2002-12-14 17:17:56 +0000 | [diff] [blame] | 447 | need to remove |type| from its tp_subclasses. |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 448 | conversely, any class now in __bases__ that wasn't |
Raymond Hettinger | a828586 | 2002-12-14 17:17:56 +0000 | [diff] [blame] | 449 | needs to have |type| added to its subclasses. */ |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 450 | |
| 451 | /* for now, sod that: just remove from all old_bases, |
| 452 | add to all new_bases */ |
| 453 | |
| 454 | for (i = PyTuple_GET_SIZE(old_bases) - 1; i >= 0; i--) { |
| 455 | ob = PyTuple_GET_ITEM(old_bases, i); |
| 456 | if (PyType_Check(ob)) { |
| 457 | remove_subclass( |
| 458 | (PyTypeObject*)ob, type); |
| 459 | } |
| 460 | } |
| 461 | |
| 462 | for (i = PyTuple_GET_SIZE(value) - 1; i >= 0; i--) { |
| 463 | ob = PyTuple_GET_ITEM(value, i); |
| 464 | if (PyType_Check(ob)) { |
| 465 | if (add_subclass((PyTypeObject*)ob, type) < 0) |
| 466 | r = -1; |
| 467 | } |
| 468 | } |
| 469 | |
| 470 | update_all_slots(type); |
| 471 | |
| 472 | Py_DECREF(old_bases); |
| 473 | Py_DECREF(old_base); |
| 474 | Py_DECREF(old_mro); |
| 475 | |
| 476 | return r; |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 477 | |
| 478 | bail: |
Michael W. Hudson | e723e45 | 2003-08-07 14:58:10 +0000 | [diff] [blame] | 479 | Py_DECREF(type->tp_bases); |
| 480 | Py_DECREF(type->tp_base); |
| 481 | if (type->tp_mro != old_mro) { |
| 482 | Py_DECREF(type->tp_mro); |
| 483 | } |
| 484 | |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 485 | type->tp_bases = old_bases; |
| 486 | type->tp_base = old_base; |
| 487 | type->tp_mro = old_mro; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 488 | |
Michael W. Hudson | 7e7c00d | 2002-11-27 15:40:09 +0000 | [diff] [blame] | 489 | return -1; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 490 | } |
| 491 | |
| 492 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 493 | type_dict(PyTypeObject *type, void *context) |
| 494 | { |
| 495 | if (type->tp_dict == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 496 | Py_INCREF(Py_None); |
| 497 | return Py_None; |
Guido van Rossum | 29ca26e | 1995-01-07 11:58:15 +0000 | [diff] [blame] | 498 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 499 | return PyDictProxy_New(type->tp_dict); |
Guido van Rossum | 29ca26e | 1995-01-07 11:58:15 +0000 | [diff] [blame] | 500 | } |
| 501 | |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 502 | static PyObject * |
| 503 | type_get_doc(PyTypeObject *type, void *context) |
| 504 | { |
| 505 | PyObject *result; |
Guido van Rossum | 6ca7d41 | 2002-04-18 00:22:00 +0000 | [diff] [blame] | 506 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE) && type->tp_doc != NULL) |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 507 | return PyString_FromString(type->tp_doc); |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 508 | result = PyDict_GetItemString(type->tp_dict, "__doc__"); |
Guido van Rossum | 6ca7d41 | 2002-04-18 00:22:00 +0000 | [diff] [blame] | 509 | if (result == NULL) { |
| 510 | result = Py_None; |
| 511 | Py_INCREF(result); |
| 512 | } |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 513 | else if (Py_TYPE(result)->tp_descr_get) { |
| 514 | result = Py_TYPE(result)->tp_descr_get(result, NULL, |
Tim Peters | 2b85897 | 2002-04-18 04:12:28 +0000 | [diff] [blame] | 515 | (PyObject *)type); |
Guido van Rossum | 6ca7d41 | 2002-04-18 00:22:00 +0000 | [diff] [blame] | 516 | } |
| 517 | else { |
| 518 | Py_INCREF(result); |
| 519 | } |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 520 | return result; |
| 521 | } |
| 522 | |
Neil Schemenauer | f23473f | 2001-10-21 22:28:58 +0000 | [diff] [blame] | 523 | static PyGetSetDef type_getsets[] = { |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 524 | {"__name__", (getter)type_name, (setter)type_set_name, NULL}, |
| 525 | {"__bases__", (getter)type_get_bases, (setter)type_set_bases, NULL}, |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 526 | {"__module__", (getter)type_module, (setter)type_set_module, NULL}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 527 | {"__dict__", (getter)type_dict, NULL, NULL}, |
Tim Peters | 2400831 | 2002-03-17 18:56:20 +0000 | [diff] [blame] | 528 | {"__doc__", (getter)type_get_doc, NULL, NULL}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 529 | {0} |
| 530 | }; |
| 531 | |
Martin v. Löwis | 0163d6d | 2001-06-09 07:34:05 +0000 | [diff] [blame] | 532 | static int |
| 533 | type_compare(PyObject *v, PyObject *w) |
| 534 | { |
| 535 | /* This is called with type objects only. So we |
| 536 | can just compare the addresses. */ |
| 537 | Py_uintptr_t vv = (Py_uintptr_t)v; |
| 538 | Py_uintptr_t ww = (Py_uintptr_t)w; |
| 539 | return (vv < ww) ? -1 : (vv > ww) ? 1 : 0; |
| 540 | } |
| 541 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 542 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 543 | type_repr(PyTypeObject *type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 544 | { |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 545 | PyObject *mod, *name, *rtn; |
Guido van Rossum | a4cb788 | 2001-09-25 03:56:29 +0000 | [diff] [blame] | 546 | char *kind; |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 547 | |
| 548 | mod = type_module(type, NULL); |
| 549 | if (mod == NULL) |
| 550 | PyErr_Clear(); |
| 551 | else if (!PyString_Check(mod)) { |
| 552 | Py_DECREF(mod); |
| 553 | mod = NULL; |
| 554 | } |
| 555 | name = type_name(type, NULL); |
| 556 | if (name == NULL) |
| 557 | return NULL; |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 558 | |
Guido van Rossum | a4cb788 | 2001-09-25 03:56:29 +0000 | [diff] [blame] | 559 | if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
| 560 | kind = "class"; |
| 561 | else |
| 562 | kind = "type"; |
| 563 | |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 564 | if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__")) { |
Guido van Rossum | a4cb788 | 2001-09-25 03:56:29 +0000 | [diff] [blame] | 565 | rtn = PyString_FromFormat("<%s '%s.%s'>", |
| 566 | kind, |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 567 | PyString_AS_STRING(mod), |
| 568 | PyString_AS_STRING(name)); |
| 569 | } |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 570 | else |
Guido van Rossum | a4cb788 | 2001-09-25 03:56:29 +0000 | [diff] [blame] | 571 | rtn = PyString_FromFormat("<%s '%s'>", kind, type->tp_name); |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 572 | |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 573 | Py_XDECREF(mod); |
| 574 | Py_DECREF(name); |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 575 | return rtn; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 576 | } |
| 577 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 578 | static PyObject * |
| 579 | type_call(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 580 | { |
| 581 | PyObject *obj; |
| 582 | |
| 583 | if (type->tp_new == NULL) { |
| 584 | PyErr_Format(PyExc_TypeError, |
| 585 | "cannot create '%.100s' instances", |
| 586 | type->tp_name); |
| 587 | return NULL; |
| 588 | } |
| 589 | |
Tim Peters | 3f996e7 | 2001-09-13 19:18:27 +0000 | [diff] [blame] | 590 | obj = type->tp_new(type, args, kwds); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 591 | if (obj != NULL) { |
Guido van Rossum | f76de62 | 2001-10-18 15:49:21 +0000 | [diff] [blame] | 592 | /* Ugly exception: when the call was type(something), |
| 593 | don't call tp_init on the result. */ |
| 594 | if (type == &PyType_Type && |
| 595 | PyTuple_Check(args) && PyTuple_GET_SIZE(args) == 1 && |
| 596 | (kwds == NULL || |
| 597 | (PyDict_Check(kwds) && PyDict_Size(kwds) == 0))) |
| 598 | return obj; |
Guido van Rossum | 8ace1ab | 2002-04-06 01:05:01 +0000 | [diff] [blame] | 599 | /* If the returned object is not an instance of type, |
| 600 | it won't be initialized. */ |
| 601 | if (!PyType_IsSubtype(obj->ob_type, type)) |
| 602 | return obj; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 603 | type = obj->ob_type; |
Jeremy Hylton | 719841e | 2002-07-16 19:39:38 +0000 | [diff] [blame] | 604 | if (PyType_HasFeature(type, Py_TPFLAGS_HAVE_CLASS) && |
| 605 | type->tp_init != NULL && |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 606 | type->tp_init(obj, args, kwds) < 0) { |
| 607 | Py_DECREF(obj); |
| 608 | obj = NULL; |
| 609 | } |
| 610 | } |
| 611 | return obj; |
| 612 | } |
| 613 | |
| 614 | PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 615 | PyType_GenericAlloc(PyTypeObject *type, Py_ssize_t nitems) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 616 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 617 | PyObject *obj; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 618 | const size_t size = _PyObject_VAR_SIZE(type, nitems+1); |
| 619 | /* note that we need to add one, for the sentinel */ |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 620 | |
| 621 | if (PyType_IS_GC(type)) |
Neil Schemenauer | 09a2ae5 | 2002-04-12 03:06:53 +0000 | [diff] [blame] | 622 | obj = _PyObject_GC_Malloc(size); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 623 | else |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 624 | obj = (PyObject *)PyObject_MALLOC(size); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 625 | |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 626 | if (obj == NULL) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 627 | return PyErr_NoMemory(); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 628 | |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 629 | memset(obj, '\0', size); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 630 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 631 | if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
| 632 | Py_INCREF(type); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 633 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 634 | if (type->tp_itemsize == 0) |
| 635 | PyObject_INIT(obj, type); |
| 636 | else |
| 637 | (void) PyObject_INIT_VAR((PyVarObject *)obj, type, nitems); |
Tim Peters | 406fe3b | 2001-10-06 19:04:01 +0000 | [diff] [blame] | 638 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 639 | if (PyType_IS_GC(type)) |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 640 | _PyObject_GC_TRACK(obj); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 641 | return obj; |
| 642 | } |
| 643 | |
| 644 | PyObject * |
| 645 | PyType_GenericNew(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 646 | { |
| 647 | return type->tp_alloc(type, 0); |
| 648 | } |
| 649 | |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 650 | /* Helpers for subtyping */ |
| 651 | |
| 652 | static int |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 653 | traverse_slots(PyTypeObject *type, PyObject *self, visitproc visit, void *arg) |
| 654 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 655 | Py_ssize_t i, n; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 656 | PyMemberDef *mp; |
| 657 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 658 | n = Py_SIZE(type); |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 659 | mp = PyHeapType_GET_MEMBERS((PyHeapTypeObject *)type); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 660 | for (i = 0; i < n; i++, mp++) { |
| 661 | if (mp->type == T_OBJECT_EX) { |
| 662 | char *addr = (char *)self + mp->offset; |
| 663 | PyObject *obj = *(PyObject **)addr; |
| 664 | if (obj != NULL) { |
| 665 | int err = visit(obj, arg); |
| 666 | if (err) |
| 667 | return err; |
| 668 | } |
| 669 | } |
| 670 | } |
| 671 | return 0; |
| 672 | } |
| 673 | |
| 674 | static int |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 675 | subtype_traverse(PyObject *self, visitproc visit, void *arg) |
| 676 | { |
| 677 | PyTypeObject *type, *base; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 678 | traverseproc basetraverse; |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 679 | |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 680 | /* Find the nearest base with a different tp_traverse, |
| 681 | and traverse slots while we're at it */ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 682 | type = Py_TYPE(self); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 683 | base = type; |
| 684 | while ((basetraverse = base->tp_traverse) == subtype_traverse) { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 685 | if (Py_SIZE(base)) { |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 686 | int err = traverse_slots(base, self, visit, arg); |
| 687 | if (err) |
| 688 | return err; |
| 689 | } |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 690 | base = base->tp_base; |
| 691 | assert(base); |
| 692 | } |
| 693 | |
| 694 | if (type->tp_dictoffset != base->tp_dictoffset) { |
| 695 | PyObject **dictptr = _PyObject_GetDictPtr(self); |
Thomas Wouters | c6e5506 | 2006-04-15 21:47:09 +0000 | [diff] [blame] | 696 | if (dictptr && *dictptr) |
| 697 | Py_VISIT(*dictptr); |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 698 | } |
| 699 | |
Thomas Wouters | c6e5506 | 2006-04-15 21:47:09 +0000 | [diff] [blame] | 700 | if (type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 701 | /* For a heaptype, the instances count as references |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 702 | to the type. Traverse the type so the collector |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 703 | can find cycles involving this link. */ |
Thomas Wouters | c6e5506 | 2006-04-15 21:47:09 +0000 | [diff] [blame] | 704 | Py_VISIT(type); |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 705 | |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 706 | if (basetraverse) |
| 707 | return basetraverse(self, visit, arg); |
| 708 | return 0; |
| 709 | } |
| 710 | |
| 711 | static void |
| 712 | clear_slots(PyTypeObject *type, PyObject *self) |
| 713 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 714 | Py_ssize_t i, n; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 715 | PyMemberDef *mp; |
| 716 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 717 | n = Py_SIZE(type); |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 718 | mp = PyHeapType_GET_MEMBERS((PyHeapTypeObject *)type); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 719 | for (i = 0; i < n; i++, mp++) { |
| 720 | if (mp->type == T_OBJECT_EX && !(mp->flags & READONLY)) { |
| 721 | char *addr = (char *)self + mp->offset; |
| 722 | PyObject *obj = *(PyObject **)addr; |
| 723 | if (obj != NULL) { |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 724 | *(PyObject **)addr = NULL; |
Thomas Wouters | edf17d8 | 2006-04-15 17:28:34 +0000 | [diff] [blame] | 725 | Py_DECREF(obj); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 726 | } |
| 727 | } |
| 728 | } |
| 729 | } |
| 730 | |
| 731 | static int |
| 732 | subtype_clear(PyObject *self) |
| 733 | { |
| 734 | PyTypeObject *type, *base; |
| 735 | inquiry baseclear; |
| 736 | |
| 737 | /* Find the nearest base with a different tp_clear |
| 738 | and clear slots while we're at it */ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 739 | type = Py_TYPE(self); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 740 | base = type; |
| 741 | while ((baseclear = base->tp_clear) == subtype_clear) { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 742 | if (Py_SIZE(base)) |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 743 | clear_slots(base, self); |
| 744 | base = base->tp_base; |
| 745 | assert(base); |
| 746 | } |
| 747 | |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 748 | /* There's no need to clear the instance dict (if any); |
| 749 | the collector will call its tp_clear handler. */ |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 750 | |
| 751 | if (baseclear) |
| 752 | return baseclear(self); |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 753 | return 0; |
| 754 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 755 | |
| 756 | static void |
| 757 | subtype_dealloc(PyObject *self) |
| 758 | { |
Guido van Rossum | 14227b4 | 2001-12-06 02:35:58 +0000 | [diff] [blame] | 759 | PyTypeObject *type, *base; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 760 | destructor basedealloc; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 761 | |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 762 | /* Extract the type; we expect it to be a heap type */ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 763 | type = Py_TYPE(self); |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 764 | assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 765 | |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 766 | /* Test whether the type has GC exactly once */ |
| 767 | |
| 768 | if (!PyType_IS_GC(type)) { |
| 769 | /* It's really rare to find a dynamic type that doesn't have |
| 770 | GC; it can only happen when deriving from 'object' and not |
| 771 | adding any slots or instance variables. This allows |
| 772 | certain simplifications: there's no need to call |
| 773 | clear_slots(), or DECREF the dict, or clear weakrefs. */ |
| 774 | |
| 775 | /* Maybe call finalizer; exit early if resurrected */ |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 776 | if (type->tp_del) { |
| 777 | type->tp_del(self); |
| 778 | if (self->ob_refcnt > 0) |
| 779 | return; |
| 780 | } |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 781 | |
| 782 | /* Find the nearest base with a different tp_dealloc */ |
| 783 | base = type; |
| 784 | while ((basedealloc = base->tp_dealloc) == subtype_dealloc) { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 785 | assert(Py_SIZE(base) == 0); |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 786 | base = base->tp_base; |
| 787 | assert(base); |
| 788 | } |
| 789 | |
| 790 | /* Call the base tp_dealloc() */ |
| 791 | assert(basedealloc); |
| 792 | basedealloc(self); |
| 793 | |
| 794 | /* Can't reference self beyond this point */ |
| 795 | Py_DECREF(type); |
| 796 | |
| 797 | /* Done */ |
| 798 | return; |
| 799 | } |
| 800 | |
| 801 | /* We get here only if the type has GC */ |
| 802 | |
| 803 | /* UnTrack and re-Track around the trashcan macro, alas */ |
Andrew M. Kuchling | c9172d3 | 2003-02-06 15:22:49 +0000 | [diff] [blame] | 804 | /* See explanation at end of function for full disclosure */ |
Guido van Rossum | 0906e07 | 2002-08-07 20:42:09 +0000 | [diff] [blame] | 805 | PyObject_GC_UnTrack(self); |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 806 | ++_PyTrash_delete_nesting; |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 807 | Py_TRASHCAN_SAFE_BEGIN(self); |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 808 | --_PyTrash_delete_nesting; |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 809 | /* DO NOT restore GC tracking at this point. weakref callbacks |
| 810 | * (if any, and whether directly here or indirectly in something we |
| 811 | * call) may trigger GC, and if self is tracked at that point, it |
| 812 | * 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] | 813 | */ |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 814 | |
Guido van Rossum | 59195fd | 2003-06-13 20:54:40 +0000 | [diff] [blame] | 815 | /* Find the nearest base with a different tp_dealloc */ |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 816 | base = type; |
| 817 | while ((basedealloc = base->tp_dealloc) == subtype_dealloc) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 818 | base = base->tp_base; |
| 819 | assert(base); |
Guido van Rossum | 14227b4 | 2001-12-06 02:35:58 +0000 | [diff] [blame] | 820 | } |
| 821 | |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 822 | /* 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] | 823 | the finalizer (__del__), clearing slots, or clearing the instance |
| 824 | dict. */ |
| 825 | |
Guido van Rossum | 1987c66 | 2003-05-29 14:29:23 +0000 | [diff] [blame] | 826 | if (type->tp_weaklistoffset && !base->tp_weaklistoffset) |
| 827 | PyObject_ClearWeakRefs(self); |
| 828 | |
| 829 | /* Maybe call finalizer; exit early if resurrected */ |
| 830 | if (type->tp_del) { |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 831 | _PyObject_GC_TRACK(self); |
Guido van Rossum | 1987c66 | 2003-05-29 14:29:23 +0000 | [diff] [blame] | 832 | type->tp_del(self); |
| 833 | if (self->ob_refcnt > 0) |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 834 | goto endlabel; /* resurrected */ |
| 835 | else |
| 836 | _PyObject_GC_UNTRACK(self); |
Brett Cannon | f5bee30 | 2007-01-23 23:21:22 +0000 | [diff] [blame] | 837 | /* New weakrefs could be created during the finalizer call. |
| 838 | If this occurs, clear them out without calling their |
| 839 | finalizers since they might rely on part of the object |
| 840 | being finalized that has already been destroyed. */ |
| 841 | if (type->tp_weaklistoffset && !base->tp_weaklistoffset) { |
| 842 | /* Modeled after GET_WEAKREFS_LISTPTR() */ |
| 843 | PyWeakReference **list = (PyWeakReference **) \ |
| 844 | PyObject_GET_WEAKREFS_LISTPTR(self); |
| 845 | while (*list) |
| 846 | _PyWeakref_ClearRef(*list); |
| 847 | } |
Guido van Rossum | 1987c66 | 2003-05-29 14:29:23 +0000 | [diff] [blame] | 848 | } |
| 849 | |
Guido van Rossum | 59195fd | 2003-06-13 20:54:40 +0000 | [diff] [blame] | 850 | /* Clear slots up to the nearest base with a different tp_dealloc */ |
| 851 | base = type; |
| 852 | while ((basedealloc = base->tp_dealloc) == subtype_dealloc) { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 853 | if (Py_SIZE(base)) |
Guido van Rossum | 59195fd | 2003-06-13 20:54:40 +0000 | [diff] [blame] | 854 | clear_slots(base, self); |
| 855 | base = base->tp_base; |
| 856 | assert(base); |
| 857 | } |
| 858 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 859 | /* If we added a dict, DECREF it */ |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 860 | if (type->tp_dictoffset && !base->tp_dictoffset) { |
| 861 | PyObject **dictptr = _PyObject_GetDictPtr(self); |
| 862 | if (dictptr != NULL) { |
| 863 | PyObject *dict = *dictptr; |
| 864 | if (dict != NULL) { |
| 865 | Py_DECREF(dict); |
| 866 | *dictptr = NULL; |
| 867 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 868 | } |
| 869 | } |
| 870 | |
Tim Peters | 0bd743c | 2003-11-13 22:50:00 +0000 | [diff] [blame] | 871 | /* Call the base tp_dealloc(); first retrack self if |
| 872 | * basedealloc knows about gc. |
| 873 | */ |
| 874 | if (PyType_IS_GC(base)) |
| 875 | _PyObject_GC_TRACK(self); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 876 | assert(basedealloc); |
| 877 | basedealloc(self); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 878 | |
| 879 | /* Can't reference self beyond this point */ |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 880 | Py_DECREF(type); |
| 881 | |
Guido van Rossum | 0906e07 | 2002-08-07 20:42:09 +0000 | [diff] [blame] | 882 | endlabel: |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 883 | ++_PyTrash_delete_nesting; |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 884 | Py_TRASHCAN_SAFE_END(self); |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 885 | --_PyTrash_delete_nesting; |
| 886 | |
| 887 | /* Explanation of the weirdness around the trashcan macros: |
| 888 | |
| 889 | Q. What do the trashcan macros do? |
| 890 | |
| 891 | A. Read the comment titled "Trashcan mechanism" in object.h. |
| 892 | For one, this explains why there must be a call to GC-untrack |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 893 | before the trashcan begin macro. Without understanding the |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 894 | trashcan code, the answers to the following questions don't make |
| 895 | sense. |
| 896 | |
| 897 | Q. Why do we GC-untrack before the trashcan and then immediately |
| 898 | GC-track again afterward? |
| 899 | |
| 900 | A. In the case that the base class is GC-aware, the base class |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 901 | probably GC-untracks the object. If it does that using the |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 902 | UNTRACK macro, this will crash when the object is already |
| 903 | untracked. Because we don't know what the base class does, the |
| 904 | only safe thing is to make sure the object is tracked when we |
| 905 | call the base class dealloc. But... The trashcan begin macro |
| 906 | requires that the object is *untracked* before it is called. So |
| 907 | the dance becomes: |
| 908 | |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 909 | GC untrack |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 910 | trashcan begin |
| 911 | GC track |
| 912 | |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 913 | Q. Why did the last question say "immediately GC-track again"? |
| 914 | It's nowhere near immediately. |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 915 | |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 916 | A. Because the code *used* to re-track immediately. Bad Idea. |
| 917 | self has a refcount of 0, and if gc ever gets its hands on it |
| 918 | (which can happen if any weakref callback gets invoked), it |
| 919 | looks like trash to gc too, and gc also tries to delete self |
| 920 | then. But we're already deleting self. Double dealloction is |
| 921 | a subtle disaster. |
Tim Peters | f7f9e99 | 2003-11-13 21:59:32 +0000 | [diff] [blame] | 922 | |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 923 | Q. Why the bizarre (net-zero) manipulation of |
| 924 | _PyTrash_delete_nesting around the trashcan macros? |
| 925 | |
| 926 | A. Some base classes (e.g. list) also use the trashcan mechanism. |
| 927 | The following scenario used to be possible: |
| 928 | |
| 929 | - suppose the trashcan level is one below the trashcan limit |
| 930 | |
| 931 | - subtype_dealloc() is called |
| 932 | |
| 933 | - the trashcan limit is not yet reached, so the trashcan level |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 934 | is incremented and the code between trashcan begin and end is |
| 935 | executed |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 936 | |
| 937 | - this destroys much of the object's contents, including its |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 938 | slots and __dict__ |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 939 | |
| 940 | - basedealloc() is called; this is really list_dealloc(), or |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 941 | some other type which also uses the trashcan macros |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 942 | |
| 943 | - the trashcan limit is now reached, so the object is put on the |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 944 | trashcan's to-be-deleted-later list |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 945 | |
| 946 | - basedealloc() returns |
| 947 | |
| 948 | - subtype_dealloc() decrefs the object's type |
| 949 | |
| 950 | - subtype_dealloc() returns |
| 951 | |
| 952 | - later, the trashcan code starts deleting the objects from its |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 953 | to-be-deleted-later list |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 954 | |
| 955 | - subtype_dealloc() is called *AGAIN* for the same object |
| 956 | |
| 957 | - at the very least (if the destroyed slots and __dict__ don't |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 958 | cause problems) the object's type gets decref'ed a second |
| 959 | time, which is *BAD*!!! |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 960 | |
| 961 | The remedy is to make sure that if the code between trashcan |
| 962 | begin and end in subtype_dealloc() is called, the code between |
| 963 | trashcan begin and end in basedealloc() will also be called. |
| 964 | This is done by decrementing the level after passing into the |
| 965 | trashcan block, and incrementing it just before leaving the |
| 966 | block. |
| 967 | |
| 968 | But now it's possible that a chain of objects consisting solely |
| 969 | of objects whose deallocator is subtype_dealloc() will defeat |
| 970 | the trashcan mechanism completely: the decremented level means |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 971 | that the effective level never reaches the limit. Therefore, we |
Guido van Rossum | ce8bcd8 | 2003-02-05 22:39:45 +0000 | [diff] [blame] | 972 | *increment* the level *before* entering the trashcan block, and |
| 973 | matchingly decrement it after leaving. This means the trashcan |
| 974 | code will trigger a little early, but that's no big deal. |
| 975 | |
| 976 | Q. Are there any live examples of code in need of all this |
| 977 | complexity? |
| 978 | |
| 979 | A. Yes. See SF bug 668433 for code that crashed (when Python was |
| 980 | compiled in debug mode) before the trashcan level manipulations |
| 981 | were added. For more discussion, see SF patches 581742, 575073 |
| 982 | and bug 574207. |
| 983 | */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 984 | } |
| 985 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 986 | static PyTypeObject *solid_base(PyTypeObject *type); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 987 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 988 | /* type test with subclassing support */ |
| 989 | |
| 990 | int |
| 991 | PyType_IsSubtype(PyTypeObject *a, PyTypeObject *b) |
| 992 | { |
| 993 | PyObject *mro; |
| 994 | |
Guido van Rossum | 9478d07 | 2001-09-07 18:52:13 +0000 | [diff] [blame] | 995 | if (!(a->tp_flags & Py_TPFLAGS_HAVE_CLASS)) |
| 996 | return b == a || b == &PyBaseObject_Type; |
| 997 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 998 | mro = a->tp_mro; |
| 999 | if (mro != NULL) { |
| 1000 | /* Deal with multiple inheritance without recursion |
| 1001 | by walking the MRO tuple */ |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1002 | Py_ssize_t i, n; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1003 | assert(PyTuple_Check(mro)); |
| 1004 | n = PyTuple_GET_SIZE(mro); |
| 1005 | for (i = 0; i < n; i++) { |
| 1006 | if (PyTuple_GET_ITEM(mro, i) == (PyObject *)b) |
| 1007 | return 1; |
| 1008 | } |
| 1009 | return 0; |
| 1010 | } |
| 1011 | else { |
| 1012 | /* a is not completely initilized yet; follow tp_base */ |
| 1013 | do { |
| 1014 | if (a == b) |
| 1015 | return 1; |
| 1016 | a = a->tp_base; |
| 1017 | } while (a != NULL); |
| 1018 | return b == &PyBaseObject_Type; |
| 1019 | } |
| 1020 | } |
| 1021 | |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1022 | /* Internal routines to do a method lookup in the type |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1023 | without looking in the instance dictionary |
| 1024 | (so we can't use PyObject_GetAttr) but still binding |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 1025 | it to the instance. The arguments are the object, |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1026 | 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] | 1027 | static variable used to cache the interned Python string. |
| 1028 | |
| 1029 | Two variants: |
| 1030 | |
| 1031 | - lookup_maybe() returns NULL without raising an exception |
| 1032 | when the _PyType_Lookup() call fails; |
| 1033 | |
| 1034 | - lookup_method() always raises an exception upon errors. |
| 1035 | */ |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1036 | |
| 1037 | static PyObject * |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1038 | lookup_maybe(PyObject *self, char *attrstr, PyObject **attrobj) |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1039 | { |
| 1040 | PyObject *res; |
| 1041 | |
| 1042 | if (*attrobj == NULL) { |
| 1043 | *attrobj = PyString_InternFromString(attrstr); |
| 1044 | if (*attrobj == NULL) |
| 1045 | return NULL; |
| 1046 | } |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1047 | res = _PyType_Lookup(Py_TYPE(self), *attrobj); |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1048 | if (res != NULL) { |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1049 | descrgetfunc f; |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1050 | if ((f = Py_TYPE(res)->tp_descr_get) == NULL) |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1051 | Py_INCREF(res); |
| 1052 | else |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1053 | res = f(res, self, (PyObject *)(Py_TYPE(self))); |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1054 | } |
| 1055 | return res; |
| 1056 | } |
| 1057 | |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1058 | static PyObject * |
| 1059 | lookup_method(PyObject *self, char *attrstr, PyObject **attrobj) |
| 1060 | { |
| 1061 | PyObject *res = lookup_maybe(self, attrstr, attrobj); |
| 1062 | if (res == NULL && !PyErr_Occurred()) |
| 1063 | PyErr_SetObject(PyExc_AttributeError, *attrobj); |
| 1064 | return res; |
| 1065 | } |
| 1066 | |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1067 | /* A variation of PyObject_CallMethod that uses lookup_method() |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 1068 | instead of PyObject_GetAttrString(). This uses the same convention |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1069 | as lookup_method to cache the interned name string object. */ |
| 1070 | |
Neil Schemenauer | f23473f | 2001-10-21 22:28:58 +0000 | [diff] [blame] | 1071 | static PyObject * |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1072 | call_method(PyObject *o, char *name, PyObject **nameobj, char *format, ...) |
| 1073 | { |
| 1074 | va_list va; |
| 1075 | PyObject *args, *func = 0, *retval; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1076 | va_start(va, format); |
| 1077 | |
Guido van Rossum | da21c01 | 2001-10-03 00:50:18 +0000 | [diff] [blame] | 1078 | func = lookup_maybe(o, name, nameobj); |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1079 | if (func == NULL) { |
| 1080 | va_end(va); |
| 1081 | if (!PyErr_Occurred()) |
Guido van Rossum | da21c01 | 2001-10-03 00:50:18 +0000 | [diff] [blame] | 1082 | PyErr_SetObject(PyExc_AttributeError, *nameobj); |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1083 | return NULL; |
| 1084 | } |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1085 | |
| 1086 | if (format && *format) |
| 1087 | args = Py_VaBuildValue(format, va); |
| 1088 | else |
| 1089 | args = PyTuple_New(0); |
| 1090 | |
| 1091 | va_end(va); |
| 1092 | |
| 1093 | if (args == NULL) |
| 1094 | return NULL; |
| 1095 | |
| 1096 | assert(PyTuple_Check(args)); |
| 1097 | retval = PyObject_Call(func, args, NULL); |
| 1098 | |
| 1099 | Py_DECREF(args); |
| 1100 | Py_DECREF(func); |
| 1101 | |
| 1102 | return retval; |
| 1103 | } |
| 1104 | |
| 1105 | /* Clone of call_method() that returns NotImplemented when the lookup fails. */ |
| 1106 | |
Neil Schemenauer | f23473f | 2001-10-21 22:28:58 +0000 | [diff] [blame] | 1107 | static PyObject * |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1108 | call_maybe(PyObject *o, char *name, PyObject **nameobj, char *format, ...) |
| 1109 | { |
| 1110 | va_list va; |
| 1111 | PyObject *args, *func = 0, *retval; |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1112 | va_start(va, format); |
| 1113 | |
Guido van Rossum | da21c01 | 2001-10-03 00:50:18 +0000 | [diff] [blame] | 1114 | func = lookup_maybe(o, name, nameobj); |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1115 | if (func == NULL) { |
| 1116 | va_end(va); |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 1117 | if (!PyErr_Occurred()) { |
| 1118 | Py_INCREF(Py_NotImplemented); |
| 1119 | return Py_NotImplemented; |
| 1120 | } |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 1121 | return NULL; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1122 | } |
| 1123 | |
| 1124 | if (format && *format) |
| 1125 | args = Py_VaBuildValue(format, va); |
| 1126 | else |
| 1127 | args = PyTuple_New(0); |
| 1128 | |
| 1129 | va_end(va); |
| 1130 | |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 1131 | if (args == NULL) |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1132 | return NULL; |
| 1133 | |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 1134 | assert(PyTuple_Check(args)); |
| 1135 | retval = PyObject_Call(func, args, NULL); |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 1136 | |
| 1137 | Py_DECREF(args); |
| 1138 | Py_DECREF(func); |
| 1139 | |
| 1140 | return retval; |
| 1141 | } |
| 1142 | |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1143 | static int |
| 1144 | fill_classic_mro(PyObject *mro, PyObject *cls) |
| 1145 | { |
| 1146 | PyObject *bases, *base; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1147 | Py_ssize_t i, n; |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1148 | |
| 1149 | assert(PyList_Check(mro)); |
| 1150 | assert(PyClass_Check(cls)); |
| 1151 | i = PySequence_Contains(mro, cls); |
| 1152 | if (i < 0) |
| 1153 | return -1; |
| 1154 | if (!i) { |
| 1155 | if (PyList_Append(mro, cls) < 0) |
| 1156 | return -1; |
| 1157 | } |
| 1158 | bases = ((PyClassObject *)cls)->cl_bases; |
| 1159 | assert(bases && PyTuple_Check(bases)); |
| 1160 | n = PyTuple_GET_SIZE(bases); |
| 1161 | for (i = 0; i < n; i++) { |
| 1162 | base = PyTuple_GET_ITEM(bases, i); |
| 1163 | if (fill_classic_mro(mro, base) < 0) |
| 1164 | return -1; |
| 1165 | } |
| 1166 | return 0; |
| 1167 | } |
| 1168 | |
| 1169 | static PyObject * |
| 1170 | classic_mro(PyObject *cls) |
| 1171 | { |
| 1172 | PyObject *mro; |
| 1173 | |
| 1174 | assert(PyClass_Check(cls)); |
| 1175 | mro = PyList_New(0); |
| 1176 | if (mro != NULL) { |
| 1177 | if (fill_classic_mro(mro, cls) == 0) |
| 1178 | return mro; |
| 1179 | Py_DECREF(mro); |
| 1180 | } |
| 1181 | return NULL; |
| 1182 | } |
| 1183 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1184 | /* |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1185 | Method resolution order algorithm C3 described in |
| 1186 | "A Monotonic Superclass Linearization for Dylan", |
| 1187 | by Kim Barrett, Bob Cassel, Paul Haahr, |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1188 | David A. Moon, Keith Playford, and P. Tucker Withington. |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1189 | (OOPSLA 1996) |
| 1190 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1191 | Some notes about the rules implied by C3: |
| 1192 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1193 | No duplicate bases. |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1194 | It isn't legal to repeat a class in a list of base classes. |
| 1195 | |
| 1196 | The next three properties are the 3 constraints in "C3". |
| 1197 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1198 | Local precendece order. |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1199 | If A precedes B in C's MRO, then A will precede B in the MRO of all |
| 1200 | subclasses of C. |
| 1201 | |
| 1202 | Monotonicity. |
| 1203 | The MRO of a class must be an extension without reordering of the |
| 1204 | MRO of each of its superclasses. |
| 1205 | |
| 1206 | Extended Precedence Graph (EPG). |
| 1207 | Linearization is consistent if there is a path in the EPG from |
| 1208 | each class to all its successors in the linearization. See |
| 1209 | the paper for definition of EPG. |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1210 | */ |
| 1211 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1212 | static int |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1213 | tail_contains(PyObject *list, int whence, PyObject *o) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1214 | Py_ssize_t j, size; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1215 | size = PyList_GET_SIZE(list); |
| 1216 | |
| 1217 | for (j = whence+1; j < size; j++) { |
| 1218 | if (PyList_GET_ITEM(list, j) == o) |
| 1219 | return 1; |
| 1220 | } |
| 1221 | return 0; |
| 1222 | } |
| 1223 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1224 | static PyObject * |
| 1225 | class_name(PyObject *cls) |
| 1226 | { |
| 1227 | PyObject *name = PyObject_GetAttrString(cls, "__name__"); |
| 1228 | if (name == NULL) { |
| 1229 | PyErr_Clear(); |
| 1230 | Py_XDECREF(name); |
| 1231 | name = PyObject_Repr(cls); |
| 1232 | } |
| 1233 | if (name == NULL) |
| 1234 | return NULL; |
| 1235 | if (!PyString_Check(name)) { |
| 1236 | Py_DECREF(name); |
| 1237 | return NULL; |
| 1238 | } |
| 1239 | return name; |
| 1240 | } |
| 1241 | |
| 1242 | static int |
| 1243 | check_duplicates(PyObject *list) |
| 1244 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1245 | Py_ssize_t i, j, n; |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1246 | /* Let's use a quadratic time algorithm, |
| 1247 | assuming that the bases lists is short. |
| 1248 | */ |
| 1249 | n = PyList_GET_SIZE(list); |
| 1250 | for (i = 0; i < n; i++) { |
| 1251 | PyObject *o = PyList_GET_ITEM(list, i); |
| 1252 | for (j = i + 1; j < n; j++) { |
| 1253 | if (PyList_GET_ITEM(list, j) == o) { |
| 1254 | o = class_name(o); |
| 1255 | PyErr_Format(PyExc_TypeError, |
| 1256 | "duplicate base class %s", |
| 1257 | o ? PyString_AS_STRING(o) : "?"); |
| 1258 | Py_XDECREF(o); |
| 1259 | return -1; |
| 1260 | } |
| 1261 | } |
| 1262 | } |
| 1263 | return 0; |
| 1264 | } |
| 1265 | |
| 1266 | /* Raise a TypeError for an MRO order disagreement. |
| 1267 | |
| 1268 | It's hard to produce a good error message. In the absence of better |
| 1269 | insight into error reporting, report the classes that were candidates |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 1270 | 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] | 1271 | order in which they should be put in the MRO, but it's hard to |
| 1272 | diagnose what constraint can't be satisfied. |
| 1273 | */ |
| 1274 | |
| 1275 | static void |
| 1276 | set_mro_error(PyObject *to_merge, int *remain) |
| 1277 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1278 | Py_ssize_t i, n, off, to_merge_size; |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1279 | char buf[1000]; |
| 1280 | PyObject *k, *v; |
| 1281 | PyObject *set = PyDict_New(); |
Georg Brandl | 5c170fd | 2006-03-17 19:03:25 +0000 | [diff] [blame] | 1282 | if (!set) return; |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1283 | |
| 1284 | to_merge_size = PyList_GET_SIZE(to_merge); |
| 1285 | for (i = 0; i < to_merge_size; i++) { |
| 1286 | PyObject *L = PyList_GET_ITEM(to_merge, i); |
| 1287 | if (remain[i] < PyList_GET_SIZE(L)) { |
| 1288 | PyObject *c = PyList_GET_ITEM(L, remain[i]); |
Georg Brandl | 5c170fd | 2006-03-17 19:03:25 +0000 | [diff] [blame] | 1289 | if (PyDict_SetItem(set, c, Py_None) < 0) { |
| 1290 | Py_DECREF(set); |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1291 | return; |
Georg Brandl | 5c170fd | 2006-03-17 19:03:25 +0000 | [diff] [blame] | 1292 | } |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1293 | } |
| 1294 | } |
| 1295 | n = PyDict_Size(set); |
| 1296 | |
Raymond Hettinger | f394df4 | 2003-04-06 19:13:41 +0000 | [diff] [blame] | 1297 | off = PyOS_snprintf(buf, sizeof(buf), "Cannot create a \ |
| 1298 | consistent method resolution\norder (MRO) for bases"); |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1299 | i = 0; |
Skip Montanaro | 429433b | 2006-04-18 00:35:43 +0000 | [diff] [blame] | 1300 | 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] | 1301 | PyObject *name = class_name(k); |
| 1302 | off += PyOS_snprintf(buf + off, sizeof(buf) - off, " %s", |
| 1303 | name ? PyString_AS_STRING(name) : "?"); |
| 1304 | Py_XDECREF(name); |
Skip Montanaro | 429433b | 2006-04-18 00:35:43 +0000 | [diff] [blame] | 1305 | if (--n && (size_t)(off+1) < sizeof(buf)) { |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1306 | buf[off++] = ','; |
| 1307 | buf[off] = '\0'; |
| 1308 | } |
| 1309 | } |
| 1310 | PyErr_SetString(PyExc_TypeError, buf); |
| 1311 | Py_DECREF(set); |
| 1312 | } |
| 1313 | |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1314 | static int |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1315 | pmerge(PyObject *acc, PyObject* to_merge) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1316 | Py_ssize_t i, j, to_merge_size, empty_cnt; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1317 | int *remain; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1318 | int ok; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1319 | |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1320 | to_merge_size = PyList_GET_SIZE(to_merge); |
| 1321 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1322 | /* remain stores an index into each sublist of to_merge. |
| 1323 | remain[i] is the index of the next base in to_merge[i] |
| 1324 | that is not included in acc. |
| 1325 | */ |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 1326 | remain = (int *)PyMem_MALLOC(SIZEOF_INT*to_merge_size); |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1327 | if (remain == NULL) |
| 1328 | return -1; |
| 1329 | for (i = 0; i < to_merge_size; i++) |
| 1330 | remain[i] = 0; |
| 1331 | |
| 1332 | again: |
| 1333 | empty_cnt = 0; |
| 1334 | for (i = 0; i < to_merge_size; i++) { |
| 1335 | PyObject *candidate; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1336 | |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1337 | PyObject *cur_list = PyList_GET_ITEM(to_merge, i); |
| 1338 | |
| 1339 | if (remain[i] >= PyList_GET_SIZE(cur_list)) { |
| 1340 | empty_cnt++; |
| 1341 | continue; |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 1342 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1343 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1344 | /* Choose next candidate for MRO. |
| 1345 | |
| 1346 | The input sequences alone can determine the choice. |
| 1347 | If not, choose the class which appears in the MRO |
| 1348 | of the earliest direct superclass of the new class. |
| 1349 | */ |
| 1350 | |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1351 | candidate = PyList_GET_ITEM(cur_list, remain[i]); |
| 1352 | for (j = 0; j < to_merge_size; j++) { |
| 1353 | PyObject *j_lst = PyList_GET_ITEM(to_merge, j); |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1354 | if (tail_contains(j_lst, remain[j], candidate)) { |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1355 | goto skip; /* continue outer loop */ |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1356 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1357 | } |
| 1358 | ok = PyList_Append(acc, candidate); |
| 1359 | if (ok < 0) { |
| 1360 | PyMem_Free(remain); |
| 1361 | return -1; |
| 1362 | } |
| 1363 | for (j = 0; j < to_merge_size; j++) { |
| 1364 | PyObject *j_lst = PyList_GET_ITEM(to_merge, j); |
Guido van Rossum | 768158c | 2002-12-31 16:33:01 +0000 | [diff] [blame] | 1365 | if (remain[j] < PyList_GET_SIZE(j_lst) && |
| 1366 | PyList_GET_ITEM(j_lst, remain[j]) == candidate) { |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1367 | remain[j]++; |
| 1368 | } |
| 1369 | } |
| 1370 | goto again; |
Tim Peters | 9a6b8d8 | 2002-11-14 23:22:33 +0000 | [diff] [blame] | 1371 | skip: ; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1372 | } |
| 1373 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1374 | if (empty_cnt == to_merge_size) { |
| 1375 | PyMem_FREE(remain); |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1376 | return 0; |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1377 | } |
| 1378 | set_mro_error(to_merge, remain); |
| 1379 | PyMem_FREE(remain); |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1380 | return -1; |
| 1381 | } |
| 1382 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1383 | static PyObject * |
| 1384 | mro_implementation(PyTypeObject *type) |
| 1385 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1386 | Py_ssize_t i, n; |
| 1387 | int ok; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1388 | PyObject *bases, *result; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1389 | PyObject *to_merge, *bases_aslist; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1390 | |
Neal Norwitz | e7bb918 | 2008-01-27 17:10:14 +0000 | [diff] [blame^] | 1391 | if (type->tp_dict == NULL) { |
| 1392 | if (PyType_Ready(type) < 0) |
Guido van Rossum | 6351757 | 2002-06-18 16:44:57 +0000 | [diff] [blame] | 1393 | return NULL; |
| 1394 | } |
| 1395 | |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1396 | /* Find a superclass linearization that honors the constraints |
| 1397 | of the explicit lists of bases and the constraints implied by |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 1398 | each base class. |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1399 | |
| 1400 | to_merge is a list of lists, where each list is a superclass |
| 1401 | linearization implied by a base class. The last element of |
| 1402 | to_merge is the declared list of bases. |
| 1403 | */ |
| 1404 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1405 | bases = type->tp_bases; |
| 1406 | n = PyTuple_GET_SIZE(bases); |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1407 | |
| 1408 | to_merge = PyList_New(n+1); |
| 1409 | if (to_merge == NULL) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1410 | return NULL; |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1411 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1412 | for (i = 0; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1413 | PyObject *base = PyTuple_GET_ITEM(bases, i); |
| 1414 | PyObject *parentMRO; |
| 1415 | if (PyType_Check(base)) |
| 1416 | parentMRO = PySequence_List( |
| 1417 | ((PyTypeObject*)base)->tp_mro); |
| 1418 | else |
| 1419 | parentMRO = classic_mro(base); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1420 | if (parentMRO == NULL) { |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1421 | Py_DECREF(to_merge); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1422 | return NULL; |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 1423 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1424 | |
| 1425 | PyList_SET_ITEM(to_merge, i, parentMRO); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1426 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1427 | |
| 1428 | bases_aslist = PySequence_List(bases); |
| 1429 | if (bases_aslist == NULL) { |
| 1430 | Py_DECREF(to_merge); |
| 1431 | return NULL; |
| 1432 | } |
Guido van Rossum | 98f3373 | 2002-11-25 21:36:54 +0000 | [diff] [blame] | 1433 | /* This is just a basic sanity check. */ |
| 1434 | if (check_duplicates(bases_aslist) < 0) { |
| 1435 | Py_DECREF(to_merge); |
| 1436 | Py_DECREF(bases_aslist); |
| 1437 | return NULL; |
| 1438 | } |
Guido van Rossum | 1f12131 | 2002-11-14 19:49:16 +0000 | [diff] [blame] | 1439 | PyList_SET_ITEM(to_merge, n, bases_aslist); |
| 1440 | |
| 1441 | result = Py_BuildValue("[O]", (PyObject *)type); |
| 1442 | if (result == NULL) { |
| 1443 | Py_DECREF(to_merge); |
| 1444 | return NULL; |
| 1445 | } |
| 1446 | |
| 1447 | ok = pmerge(result, to_merge); |
| 1448 | Py_DECREF(to_merge); |
| 1449 | if (ok < 0) { |
| 1450 | Py_DECREF(result); |
| 1451 | return NULL; |
| 1452 | } |
| 1453 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1454 | return result; |
| 1455 | } |
| 1456 | |
| 1457 | static PyObject * |
Martin v. Löwis | e3eb1f2 | 2001-08-16 13:15:00 +0000 | [diff] [blame] | 1458 | mro_external(PyObject *self) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1459 | { |
| 1460 | PyTypeObject *type = (PyTypeObject *)self; |
| 1461 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1462 | return mro_implementation(type); |
| 1463 | } |
| 1464 | |
| 1465 | static int |
| 1466 | mro_internal(PyTypeObject *type) |
| 1467 | { |
| 1468 | PyObject *mro, *result, *tuple; |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1469 | int checkit = 0; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1470 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1471 | if (Py_TYPE(type) == &PyType_Type) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1472 | result = mro_implementation(type); |
| 1473 | } |
| 1474 | else { |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1475 | static PyObject *mro_str; |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1476 | checkit = 1; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 1477 | mro = lookup_method((PyObject *)type, "mro", &mro_str); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1478 | if (mro == NULL) |
| 1479 | return -1; |
| 1480 | result = PyObject_CallObject(mro, NULL); |
| 1481 | Py_DECREF(mro); |
| 1482 | } |
| 1483 | if (result == NULL) |
| 1484 | return -1; |
| 1485 | tuple = PySequence_Tuple(result); |
| 1486 | Py_DECREF(result); |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1487 | if (tuple == NULL) |
| 1488 | return -1; |
| 1489 | if (checkit) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1490 | Py_ssize_t i, len; |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1491 | PyObject *cls; |
| 1492 | PyTypeObject *solid; |
| 1493 | |
| 1494 | solid = solid_base(type); |
| 1495 | |
| 1496 | len = PyTuple_GET_SIZE(tuple); |
| 1497 | |
| 1498 | for (i = 0; i < len; i++) { |
| 1499 | PyTypeObject *t; |
| 1500 | cls = PyTuple_GET_ITEM(tuple, i); |
| 1501 | if (PyClass_Check(cls)) |
| 1502 | continue; |
| 1503 | else if (!PyType_Check(cls)) { |
| 1504 | PyErr_Format(PyExc_TypeError, |
| 1505 | "mro() returned a non-class ('%.500s')", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1506 | Py_TYPE(cls)->tp_name); |
Neal Norwitz | 50bf51a | 2006-01-02 02:46:54 +0000 | [diff] [blame] | 1507 | Py_DECREF(tuple); |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1508 | return -1; |
| 1509 | } |
| 1510 | t = (PyTypeObject*)cls; |
| 1511 | if (!PyType_IsSubtype(solid, solid_base(t))) { |
| 1512 | PyErr_Format(PyExc_TypeError, |
| 1513 | "mro() returned base with unsuitable layout ('%.500s')", |
| 1514 | t->tp_name); |
Neal Norwitz | 50bf51a | 2006-01-02 02:46:54 +0000 | [diff] [blame] | 1515 | Py_DECREF(tuple); |
Armin Rigo | 037d1e0 | 2005-12-29 17:07:39 +0000 | [diff] [blame] | 1516 | return -1; |
| 1517 | } |
| 1518 | } |
| 1519 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1520 | type->tp_mro = tuple; |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 1521 | |
| 1522 | type_mro_modified(type, type->tp_mro); |
| 1523 | /* corner case: the old-style super class might have been hidden |
| 1524 | from the custom MRO */ |
| 1525 | type_mro_modified(type, type->tp_bases); |
| 1526 | |
| 1527 | type_modified(type); |
| 1528 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1529 | return 0; |
| 1530 | } |
| 1531 | |
| 1532 | |
| 1533 | /* Calculate the best base amongst multiple base classes. |
Armin Rigo | c0ba52d | 2007-04-19 14:44:48 +0000 | [diff] [blame] | 1534 | This is the first one that's on the path to the "solid base". */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1535 | |
| 1536 | static PyTypeObject * |
| 1537 | best_base(PyObject *bases) |
| 1538 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1539 | Py_ssize_t i, n; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1540 | PyTypeObject *base, *winner, *candidate, *base_i; |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1541 | PyObject *base_proto; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1542 | |
| 1543 | assert(PyTuple_Check(bases)); |
| 1544 | n = PyTuple_GET_SIZE(bases); |
| 1545 | assert(n > 0); |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1546 | base = NULL; |
| 1547 | winner = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1548 | for (i = 0; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1549 | base_proto = PyTuple_GET_ITEM(bases, i); |
| 1550 | if (PyClass_Check(base_proto)) |
| 1551 | continue; |
Armin Rigo | c0ba52d | 2007-04-19 14:44:48 +0000 | [diff] [blame] | 1552 | if (!PyType_Check(base_proto)) { |
| 1553 | PyErr_SetString( |
| 1554 | PyExc_TypeError, |
| 1555 | "bases must be types"); |
| 1556 | return NULL; |
| 1557 | } |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1558 | base_i = (PyTypeObject *)base_proto; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1559 | if (base_i->tp_dict == NULL) { |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 1560 | if (PyType_Ready(base_i) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1561 | return NULL; |
| 1562 | } |
| 1563 | candidate = solid_base(base_i); |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 1564 | if (winner == NULL) { |
| 1565 | winner = candidate; |
| 1566 | base = base_i; |
| 1567 | } |
| 1568 | else if (PyType_IsSubtype(winner, candidate)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1569 | ; |
| 1570 | else if (PyType_IsSubtype(candidate, winner)) { |
| 1571 | winner = candidate; |
| 1572 | base = base_i; |
| 1573 | } |
| 1574 | else { |
| 1575 | PyErr_SetString( |
| 1576 | PyExc_TypeError, |
| 1577 | "multiple bases have " |
| 1578 | "instance lay-out conflict"); |
| 1579 | return NULL; |
| 1580 | } |
| 1581 | } |
Guido van Rossum | e54616c | 2001-12-14 04:19:56 +0000 | [diff] [blame] | 1582 | if (base == NULL) |
| 1583 | PyErr_SetString(PyExc_TypeError, |
| 1584 | "a new-style class can't have only classic bases"); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1585 | return base; |
| 1586 | } |
| 1587 | |
| 1588 | static int |
| 1589 | extra_ivars(PyTypeObject *type, PyTypeObject *base) |
| 1590 | { |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 1591 | size_t t_size = type->tp_basicsize; |
| 1592 | size_t b_size = base->tp_basicsize; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1593 | |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1594 | assert(t_size >= b_size); /* Else type smaller than base! */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1595 | if (type->tp_itemsize || base->tp_itemsize) { |
| 1596 | /* If itemsize is involved, stricter rules */ |
| 1597 | return t_size != b_size || |
| 1598 | type->tp_itemsize != base->tp_itemsize; |
| 1599 | } |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1600 | if (type->tp_weaklistoffset && base->tp_weaklistoffset == 0 && |
Armin Rigo | 9790a27 | 2007-05-02 19:23:31 +0000 | [diff] [blame] | 1601 | type->tp_weaklistoffset + sizeof(PyObject *) == t_size && |
| 1602 | type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1603 | t_size -= sizeof(PyObject *); |
| 1604 | if (type->tp_dictoffset && base->tp_dictoffset == 0 && |
Armin Rigo | 9790a27 | 2007-05-02 19:23:31 +0000 | [diff] [blame] | 1605 | type->tp_dictoffset + sizeof(PyObject *) == t_size && |
| 1606 | type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1607 | t_size -= sizeof(PyObject *); |
| 1608 | |
| 1609 | return t_size != b_size; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1610 | } |
| 1611 | |
| 1612 | static PyTypeObject * |
| 1613 | solid_base(PyTypeObject *type) |
| 1614 | { |
| 1615 | PyTypeObject *base; |
| 1616 | |
| 1617 | if (type->tp_base) |
| 1618 | base = solid_base(type->tp_base); |
| 1619 | else |
| 1620 | base = &PyBaseObject_Type; |
| 1621 | if (extra_ivars(type, base)) |
| 1622 | return type; |
| 1623 | else |
| 1624 | return base; |
| 1625 | } |
| 1626 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 1627 | static void object_dealloc(PyObject *); |
| 1628 | static int object_init(PyObject *, PyObject *, PyObject *); |
| 1629 | static int update_slot(PyTypeObject *, PyObject *); |
| 1630 | static void fixup_slot_dispatchers(PyTypeObject *); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1631 | |
Armin Rigo | 9790a27 | 2007-05-02 19:23:31 +0000 | [diff] [blame] | 1632 | /* |
| 1633 | * Helpers for __dict__ descriptor. We don't want to expose the dicts |
| 1634 | * inherited from various builtin types. The builtin base usually provides |
| 1635 | * its own __dict__ descriptor, so we use that when we can. |
| 1636 | */ |
| 1637 | static PyTypeObject * |
| 1638 | get_builtin_base_with_dict(PyTypeObject *type) |
| 1639 | { |
| 1640 | while (type->tp_base != NULL) { |
| 1641 | if (type->tp_dictoffset != 0 && |
| 1642 | !(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) |
| 1643 | return type; |
| 1644 | type = type->tp_base; |
| 1645 | } |
| 1646 | return NULL; |
| 1647 | } |
| 1648 | |
| 1649 | static PyObject * |
| 1650 | get_dict_descriptor(PyTypeObject *type) |
| 1651 | { |
| 1652 | static PyObject *dict_str; |
| 1653 | PyObject *descr; |
| 1654 | |
| 1655 | if (dict_str == NULL) { |
| 1656 | dict_str = PyString_InternFromString("__dict__"); |
| 1657 | if (dict_str == NULL) |
| 1658 | return NULL; |
| 1659 | } |
| 1660 | descr = _PyType_Lookup(type, dict_str); |
| 1661 | if (descr == NULL || !PyDescr_IsData(descr)) |
| 1662 | return NULL; |
| 1663 | |
| 1664 | return descr; |
| 1665 | } |
| 1666 | |
| 1667 | static void |
| 1668 | raise_dict_descr_error(PyObject *obj) |
| 1669 | { |
| 1670 | PyErr_Format(PyExc_TypeError, |
| 1671 | "this __dict__ descriptor does not support " |
| 1672 | "'%.200s' objects", obj->ob_type->tp_name); |
| 1673 | } |
| 1674 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1675 | static PyObject * |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1676 | subtype_dict(PyObject *obj, void *context) |
| 1677 | { |
Armin Rigo | 9790a27 | 2007-05-02 19:23:31 +0000 | [diff] [blame] | 1678 | PyObject **dictptr; |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1679 | PyObject *dict; |
Armin Rigo | 9790a27 | 2007-05-02 19:23:31 +0000 | [diff] [blame] | 1680 | PyTypeObject *base; |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1681 | |
Armin Rigo | 9790a27 | 2007-05-02 19:23:31 +0000 | [diff] [blame] | 1682 | base = get_builtin_base_with_dict(obj->ob_type); |
| 1683 | if (base != NULL) { |
| 1684 | descrgetfunc func; |
| 1685 | PyObject *descr = get_dict_descriptor(base); |
| 1686 | if (descr == NULL) { |
| 1687 | raise_dict_descr_error(obj); |
| 1688 | return NULL; |
| 1689 | } |
| 1690 | func = descr->ob_type->tp_descr_get; |
| 1691 | if (func == NULL) { |
| 1692 | raise_dict_descr_error(obj); |
| 1693 | return NULL; |
| 1694 | } |
| 1695 | return func(descr, obj, (PyObject *)(obj->ob_type)); |
| 1696 | } |
| 1697 | |
| 1698 | dictptr = _PyObject_GetDictPtr(obj); |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1699 | if (dictptr == NULL) { |
| 1700 | PyErr_SetString(PyExc_AttributeError, |
| 1701 | "This object has no __dict__"); |
| 1702 | return NULL; |
| 1703 | } |
| 1704 | dict = *dictptr; |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 1705 | if (dict == NULL) |
| 1706 | *dictptr = dict = PyDict_New(); |
| 1707 | Py_XINCREF(dict); |
| 1708 | return dict; |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1709 | } |
| 1710 | |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1711 | static int |
| 1712 | subtype_setdict(PyObject *obj, PyObject *value, void *context) |
| 1713 | { |
Armin Rigo | 9790a27 | 2007-05-02 19:23:31 +0000 | [diff] [blame] | 1714 | PyObject **dictptr; |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1715 | PyObject *dict; |
Armin Rigo | 9790a27 | 2007-05-02 19:23:31 +0000 | [diff] [blame] | 1716 | PyTypeObject *base; |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1717 | |
Armin Rigo | 9790a27 | 2007-05-02 19:23:31 +0000 | [diff] [blame] | 1718 | base = get_builtin_base_with_dict(obj->ob_type); |
| 1719 | if (base != NULL) { |
| 1720 | descrsetfunc func; |
| 1721 | PyObject *descr = get_dict_descriptor(base); |
| 1722 | if (descr == NULL) { |
| 1723 | raise_dict_descr_error(obj); |
| 1724 | return -1; |
| 1725 | } |
| 1726 | func = descr->ob_type->tp_descr_set; |
| 1727 | if (func == NULL) { |
| 1728 | raise_dict_descr_error(obj); |
| 1729 | return -1; |
| 1730 | } |
| 1731 | return func(descr, obj, value); |
| 1732 | } |
| 1733 | |
| 1734 | dictptr = _PyObject_GetDictPtr(obj); |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1735 | if (dictptr == NULL) { |
| 1736 | PyErr_SetString(PyExc_AttributeError, |
| 1737 | "This object has no __dict__"); |
| 1738 | return -1; |
| 1739 | } |
Guido van Rossum | d331cb5 | 2001-12-05 19:46:42 +0000 | [diff] [blame] | 1740 | if (value != NULL && !PyDict_Check(value)) { |
Georg Brandl | ccff785 | 2006-06-18 22:17:29 +0000 | [diff] [blame] | 1741 | PyErr_Format(PyExc_TypeError, |
| 1742 | "__dict__ must be set to a dictionary, " |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1743 | "not a '%.200s'", Py_TYPE(value)->tp_name); |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1744 | return -1; |
| 1745 | } |
| 1746 | dict = *dictptr; |
Guido van Rossum | d331cb5 | 2001-12-05 19:46:42 +0000 | [diff] [blame] | 1747 | Py_XINCREF(value); |
Guido van Rossum | 6661be3 | 2001-10-26 04:26:12 +0000 | [diff] [blame] | 1748 | *dictptr = value; |
| 1749 | Py_XDECREF(dict); |
| 1750 | return 0; |
| 1751 | } |
| 1752 | |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1753 | static PyObject * |
| 1754 | subtype_getweakref(PyObject *obj, void *context) |
| 1755 | { |
| 1756 | PyObject **weaklistptr; |
| 1757 | PyObject *result; |
| 1758 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1759 | if (Py_TYPE(obj)->tp_weaklistoffset == 0) { |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1760 | PyErr_SetString(PyExc_AttributeError, |
Fred Drake | 7a36f5f | 2006-08-04 05:17:21 +0000 | [diff] [blame] | 1761 | "This object has no __weakref__"); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1762 | return NULL; |
| 1763 | } |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1764 | assert(Py_TYPE(obj)->tp_weaklistoffset > 0); |
| 1765 | assert(Py_TYPE(obj)->tp_weaklistoffset + sizeof(PyObject *) <= |
| 1766 | (size_t)(Py_TYPE(obj)->tp_basicsize)); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1767 | weaklistptr = (PyObject **) |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1768 | ((char *)obj + Py_TYPE(obj)->tp_weaklistoffset); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1769 | if (*weaklistptr == NULL) |
| 1770 | result = Py_None; |
| 1771 | else |
| 1772 | result = *weaklistptr; |
| 1773 | Py_INCREF(result); |
| 1774 | return result; |
| 1775 | } |
| 1776 | |
Guido van Rossum | 373c741 | 2003-01-07 13:41:37 +0000 | [diff] [blame] | 1777 | /* Three variants on the subtype_getsets list. */ |
| 1778 | |
| 1779 | static PyGetSetDef subtype_getsets_full[] = { |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1780 | {"__dict__", subtype_dict, subtype_setdict, |
Neal Norwitz | 858e34f | 2002-08-13 17:18:45 +0000 | [diff] [blame] | 1781 | PyDoc_STR("dictionary for instance variables (if defined)")}, |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1782 | {"__weakref__", subtype_getweakref, NULL, |
Neal Norwitz | 858e34f | 2002-08-13 17:18:45 +0000 | [diff] [blame] | 1783 | PyDoc_STR("list of weak references to the object (if defined)")}, |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1784 | {0} |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1785 | }; |
| 1786 | |
Guido van Rossum | 373c741 | 2003-01-07 13:41:37 +0000 | [diff] [blame] | 1787 | static PyGetSetDef subtype_getsets_dict_only[] = { |
| 1788 | {"__dict__", subtype_dict, subtype_setdict, |
| 1789 | PyDoc_STR("dictionary for instance variables (if defined)")}, |
| 1790 | {0} |
| 1791 | }; |
| 1792 | |
| 1793 | static PyGetSetDef subtype_getsets_weakref_only[] = { |
| 1794 | {"__weakref__", subtype_getweakref, NULL, |
| 1795 | PyDoc_STR("list of weak references to the object (if defined)")}, |
| 1796 | {0} |
| 1797 | }; |
| 1798 | |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 1799 | static int |
| 1800 | valid_identifier(PyObject *s) |
| 1801 | { |
Guido van Rossum | 03013a0 | 2002-07-16 14:30:28 +0000 | [diff] [blame] | 1802 | unsigned char *p; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1803 | Py_ssize_t i, n; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 1804 | |
| 1805 | if (!PyString_Check(s)) { |
Georg Brandl | ccff785 | 2006-06-18 22:17:29 +0000 | [diff] [blame] | 1806 | PyErr_Format(PyExc_TypeError, |
| 1807 | "__slots__ items must be strings, not '%.200s'", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1808 | Py_TYPE(s)->tp_name); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 1809 | return 0; |
| 1810 | } |
Guido van Rossum | 03013a0 | 2002-07-16 14:30:28 +0000 | [diff] [blame] | 1811 | p = (unsigned char *) PyString_AS_STRING(s); |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 1812 | n = PyString_GET_SIZE(s); |
| 1813 | /* We must reject an empty name. As a hack, we bump the |
| 1814 | length to 1 so that the loop will balk on the trailing \0. */ |
| 1815 | if (n == 0) |
| 1816 | n = 1; |
| 1817 | for (i = 0; i < n; i++, p++) { |
| 1818 | if (!(i == 0 ? isalpha(*p) : isalnum(*p)) && *p != '_') { |
| 1819 | PyErr_SetString(PyExc_TypeError, |
| 1820 | "__slots__ must be identifiers"); |
| 1821 | return 0; |
| 1822 | } |
| 1823 | } |
| 1824 | return 1; |
| 1825 | } |
| 1826 | |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 1827 | #ifdef Py_USING_UNICODE |
| 1828 | /* Replace Unicode objects in slots. */ |
| 1829 | |
| 1830 | static PyObject * |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 1831 | _unicode_to_string(PyObject *slots, Py_ssize_t nslots) |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 1832 | { |
Žiga Seilnacht | 71436f0 | 2007-03-14 12:24:09 +0000 | [diff] [blame] | 1833 | PyObject *tmp = NULL; |
| 1834 | PyObject *slot_name, *new_name; |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 1835 | Py_ssize_t i; |
Žiga Seilnacht | 71436f0 | 2007-03-14 12:24:09 +0000 | [diff] [blame] | 1836 | |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 1837 | for (i = 0; i < nslots; i++) { |
Žiga Seilnacht | 71436f0 | 2007-03-14 12:24:09 +0000 | [diff] [blame] | 1838 | if (PyUnicode_Check(slot_name = PyTuple_GET_ITEM(slots, i))) { |
| 1839 | if (tmp == NULL) { |
| 1840 | tmp = PySequence_List(slots); |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 1841 | if (tmp == NULL) |
| 1842 | return NULL; |
| 1843 | } |
Žiga Seilnacht | 71436f0 | 2007-03-14 12:24:09 +0000 | [diff] [blame] | 1844 | new_name = _PyUnicode_AsDefaultEncodedString(slot_name, |
| 1845 | NULL); |
| 1846 | if (new_name == NULL) { |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 1847 | Py_DECREF(tmp); |
Žiga Seilnacht | 71436f0 | 2007-03-14 12:24:09 +0000 | [diff] [blame] | 1848 | return NULL; |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 1849 | } |
Žiga Seilnacht | 71436f0 | 2007-03-14 12:24:09 +0000 | [diff] [blame] | 1850 | Py_INCREF(new_name); |
| 1851 | PyList_SET_ITEM(tmp, i, new_name); |
| 1852 | Py_DECREF(slot_name); |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 1853 | } |
| 1854 | } |
Žiga Seilnacht | 71436f0 | 2007-03-14 12:24:09 +0000 | [diff] [blame] | 1855 | if (tmp != NULL) { |
| 1856 | slots = PyList_AsTuple(tmp); |
| 1857 | Py_DECREF(tmp); |
| 1858 | } |
| 1859 | return slots; |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 1860 | } |
| 1861 | #endif |
| 1862 | |
Guido van Rossum | f102e24 | 2007-03-23 18:53:03 +0000 | [diff] [blame] | 1863 | /* Forward */ |
| 1864 | static int |
| 1865 | object_init(PyObject *self, PyObject *args, PyObject *kwds); |
| 1866 | |
| 1867 | static int |
| 1868 | type_init(PyObject *cls, PyObject *args, PyObject *kwds) |
| 1869 | { |
| 1870 | int res; |
| 1871 | |
| 1872 | assert(args != NULL && PyTuple_Check(args)); |
| 1873 | assert(kwds == NULL || PyDict_Check(kwds)); |
| 1874 | |
| 1875 | if (kwds != NULL && PyDict_Check(kwds) && PyDict_Size(kwds) != 0) { |
| 1876 | PyErr_SetString(PyExc_TypeError, |
| 1877 | "type.__init__() takes no keyword arguments"); |
| 1878 | return -1; |
| 1879 | } |
| 1880 | |
| 1881 | if (args != NULL && PyTuple_Check(args) && |
| 1882 | (PyTuple_GET_SIZE(args) != 1 && PyTuple_GET_SIZE(args) != 3)) { |
| 1883 | PyErr_SetString(PyExc_TypeError, |
| 1884 | "type.__init__() takes 1 or 3 arguments"); |
| 1885 | return -1; |
| 1886 | } |
| 1887 | |
| 1888 | /* Call object.__init__(self) now. */ |
| 1889 | /* XXX Could call super(type, cls).__init__() but what's the point? */ |
| 1890 | args = PyTuple_GetSlice(args, 0, 0); |
| 1891 | res = object_init(cls, args, NULL); |
| 1892 | Py_DECREF(args); |
| 1893 | return res; |
| 1894 | } |
| 1895 | |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 1896 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1897 | type_new(PyTypeObject *metatype, PyObject *args, PyObject *kwds) |
| 1898 | { |
| 1899 | PyObject *name, *bases, *dict; |
Martin v. Löwis | 15e6274 | 2006-02-27 16:46:16 +0000 | [diff] [blame] | 1900 | static char *kwlist[] = {"name", "bases", "dict", 0}; |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 1901 | PyObject *slots, *tmp, *newslots; |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1902 | PyTypeObject *type, *base, *tmptype, *winner; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 1903 | PyHeapTypeObject *et; |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 1904 | PyMemberDef *mp; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1905 | Py_ssize_t i, nbases, nslots, slotoffset, add_dict, add_weak; |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 1906 | int j, may_add_dict, may_add_weak; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1907 | |
Tim Peters | 3abca12 | 2001-10-27 19:37:48 +0000 | [diff] [blame] | 1908 | assert(args != NULL && PyTuple_Check(args)); |
| 1909 | assert(kwds == NULL || PyDict_Check(kwds)); |
| 1910 | |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1911 | /* Special case: type(x) should return x->ob_type */ |
Tim Peters | 3abca12 | 2001-10-27 19:37:48 +0000 | [diff] [blame] | 1912 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1913 | const Py_ssize_t nargs = PyTuple_GET_SIZE(args); |
| 1914 | const Py_ssize_t nkwds = kwds == NULL ? 0 : PyDict_Size(kwds); |
Tim Peters | 3abca12 | 2001-10-27 19:37:48 +0000 | [diff] [blame] | 1915 | |
| 1916 | if (PyType_CheckExact(metatype) && nargs == 1 && nkwds == 0) { |
| 1917 | PyObject *x = PyTuple_GET_ITEM(args, 0); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 1918 | Py_INCREF(Py_TYPE(x)); |
| 1919 | return (PyObject *) Py_TYPE(x); |
Tim Peters | 3abca12 | 2001-10-27 19:37:48 +0000 | [diff] [blame] | 1920 | } |
| 1921 | |
| 1922 | /* SF bug 475327 -- if that didn't trigger, we need 3 |
| 1923 | arguments. but PyArg_ParseTupleAndKeywords below may give |
| 1924 | a msg saying type() needs exactly 3. */ |
| 1925 | if (nargs + nkwds != 3) { |
| 1926 | PyErr_SetString(PyExc_TypeError, |
| 1927 | "type() takes 1 or 3 arguments"); |
| 1928 | return NULL; |
| 1929 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1930 | } |
| 1931 | |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1932 | /* Check arguments: (name, bases, dict) */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1933 | if (!PyArg_ParseTupleAndKeywords(args, kwds, "SO!O!:type", kwlist, |
| 1934 | &name, |
| 1935 | &PyTuple_Type, &bases, |
| 1936 | &PyDict_Type, &dict)) |
| 1937 | return NULL; |
| 1938 | |
Armin Rigo | c0ba52d | 2007-04-19 14:44:48 +0000 | [diff] [blame] | 1939 | /* Determine the proper metatype to deal with this, |
| 1940 | and check for metatype conflicts while we're at it. |
| 1941 | Note that if some other metatype wins to contract, |
| 1942 | it's possible that its instances are not types. */ |
| 1943 | nbases = PyTuple_GET_SIZE(bases); |
| 1944 | winner = metatype; |
| 1945 | for (i = 0; i < nbases; i++) { |
| 1946 | tmp = PyTuple_GET_ITEM(bases, i); |
| 1947 | tmptype = tmp->ob_type; |
| 1948 | if (tmptype == &PyClass_Type) |
| 1949 | continue; /* Special case classic classes */ |
| 1950 | if (PyType_IsSubtype(winner, tmptype)) |
| 1951 | continue; |
| 1952 | if (PyType_IsSubtype(tmptype, winner)) { |
| 1953 | winner = tmptype; |
| 1954 | continue; |
Jeremy Hylton | fa95569 | 2007-02-27 18:29:45 +0000 | [diff] [blame] | 1955 | } |
Armin Rigo | c0ba52d | 2007-04-19 14:44:48 +0000 | [diff] [blame] | 1956 | PyErr_SetString(PyExc_TypeError, |
| 1957 | "metaclass conflict: " |
| 1958 | "the metaclass of a derived class " |
| 1959 | "must be a (non-strict) subclass " |
| 1960 | "of the metaclasses of all its bases"); |
| 1961 | return NULL; |
| 1962 | } |
| 1963 | if (winner != metatype) { |
| 1964 | if (winner->tp_new != type_new) /* Pass it to the winner */ |
| 1965 | return winner->tp_new(winner, args, kwds); |
Guido van Rossum | 8d32c8b | 2001-08-17 11:18:38 +0000 | [diff] [blame] | 1966 | metatype = winner; |
| 1967 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1968 | |
| 1969 | /* Adjust for empty tuple bases */ |
| 1970 | if (nbases == 0) { |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 1971 | bases = PyTuple_Pack(1, &PyBaseObject_Type); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1972 | if (bases == NULL) |
| 1973 | return NULL; |
| 1974 | nbases = 1; |
| 1975 | } |
| 1976 | else |
| 1977 | Py_INCREF(bases); |
| 1978 | |
| 1979 | /* XXX From here until type is allocated, "return NULL" leaks bases! */ |
| 1980 | |
| 1981 | /* Calculate best base, and check that all bases are type objects */ |
| 1982 | base = best_base(bases); |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 1983 | if (base == NULL) { |
| 1984 | Py_DECREF(bases); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1985 | return NULL; |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 1986 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1987 | if (!PyType_HasFeature(base, Py_TPFLAGS_BASETYPE)) { |
| 1988 | PyErr_Format(PyExc_TypeError, |
| 1989 | "type '%.100s' is not an acceptable base type", |
| 1990 | base->tp_name); |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 1991 | Py_DECREF(bases); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1992 | return NULL; |
| 1993 | } |
| 1994 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1995 | /* Check for a __slots__ sequence variable in dict, and count it */ |
| 1996 | slots = PyDict_GetItemString(dict, "__slots__"); |
| 1997 | nslots = 0; |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 1998 | add_dict = 0; |
| 1999 | add_weak = 0; |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2000 | may_add_dict = base->tp_dictoffset == 0; |
| 2001 | may_add_weak = base->tp_weaklistoffset == 0 && base->tp_itemsize == 0; |
| 2002 | if (slots == NULL) { |
| 2003 | if (may_add_dict) { |
| 2004 | add_dict++; |
| 2005 | } |
| 2006 | if (may_add_weak) { |
| 2007 | add_weak++; |
| 2008 | } |
| 2009 | } |
| 2010 | else { |
| 2011 | /* Have slots */ |
| 2012 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2013 | /* Make it into a tuple */ |
Neal Norwitz | cbd9ee6 | 2007-04-14 05:25:50 +0000 | [diff] [blame] | 2014 | if (PyString_Check(slots) || PyUnicode_Check(slots)) |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 2015 | slots = PyTuple_Pack(1, slots); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2016 | else |
| 2017 | slots = PySequence_Tuple(slots); |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 2018 | if (slots == NULL) { |
| 2019 | Py_DECREF(bases); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2020 | return NULL; |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 2021 | } |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2022 | assert(PyTuple_Check(slots)); |
| 2023 | |
| 2024 | /* Are slots allowed? */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2025 | nslots = PyTuple_GET_SIZE(slots); |
Jeremy Hylton | 1c7a0ea | 2003-07-16 16:08:23 +0000 | [diff] [blame] | 2026 | if (nslots > 0 && base->tp_itemsize != 0) { |
Guido van Rossum | c414187 | 2001-08-30 04:43:35 +0000 | [diff] [blame] | 2027 | PyErr_Format(PyExc_TypeError, |
| 2028 | "nonempty __slots__ " |
| 2029 | "not supported for subtype of '%s'", |
| 2030 | base->tp_name); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2031 | bad_slots: |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 2032 | Py_DECREF(bases); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2033 | Py_DECREF(slots); |
Guido van Rossum | c414187 | 2001-08-30 04:43:35 +0000 | [diff] [blame] | 2034 | return NULL; |
| 2035 | } |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2036 | |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 2037 | #ifdef Py_USING_UNICODE |
| 2038 | tmp = _unicode_to_string(slots, nslots); |
Žiga Seilnacht | 71436f0 | 2007-03-14 12:24:09 +0000 | [diff] [blame] | 2039 | if (tmp == NULL) |
| 2040 | goto bad_slots; |
Martin v. Löwis | 13b1a5c | 2002-10-14 21:11:34 +0000 | [diff] [blame] | 2041 | if (tmp != slots) { |
| 2042 | Py_DECREF(slots); |
| 2043 | slots = tmp; |
| 2044 | } |
Martin v. Löwis | d919a59 | 2002-10-14 21:07:28 +0000 | [diff] [blame] | 2045 | #endif |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2046 | /* Check for valid slot names and two special cases */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2047 | for (i = 0; i < nslots; i++) { |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2048 | PyObject *tmp = PyTuple_GET_ITEM(slots, i); |
| 2049 | char *s; |
| 2050 | if (!valid_identifier(tmp)) |
| 2051 | goto bad_slots; |
| 2052 | assert(PyString_Check(tmp)); |
| 2053 | s = PyString_AS_STRING(tmp); |
| 2054 | if (strcmp(s, "__dict__") == 0) { |
| 2055 | if (!may_add_dict || add_dict) { |
| 2056 | PyErr_SetString(PyExc_TypeError, |
| 2057 | "__dict__ slot disallowed: " |
| 2058 | "we already got one"); |
| 2059 | goto bad_slots; |
| 2060 | } |
| 2061 | add_dict++; |
| 2062 | } |
| 2063 | if (strcmp(s, "__weakref__") == 0) { |
| 2064 | if (!may_add_weak || add_weak) { |
| 2065 | PyErr_SetString(PyExc_TypeError, |
| 2066 | "__weakref__ slot disallowed: " |
| 2067 | "either we already got one, " |
| 2068 | "or __itemsize__ != 0"); |
| 2069 | goto bad_slots; |
| 2070 | } |
| 2071 | add_weak++; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2072 | } |
| 2073 | } |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2074 | |
Žiga Seilnacht | 6f2d09c | 2007-03-16 11:59:38 +0000 | [diff] [blame] | 2075 | /* Copy slots into a list, mangle names and sort them. |
| 2076 | Sorted names are needed for __class__ assignment. |
| 2077 | Convert them back to tuple at the end. |
| 2078 | */ |
| 2079 | newslots = PyList_New(nslots - add_dict - add_weak); |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2080 | if (newslots == NULL) |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2081 | goto bad_slots; |
| 2082 | for (i = j = 0; i < nslots; i++) { |
| 2083 | char *s; |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2084 | tmp = PyTuple_GET_ITEM(slots, i); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2085 | s = PyString_AS_STRING(tmp); |
| 2086 | if ((add_dict && strcmp(s, "__dict__") == 0) || |
| 2087 | (add_weak && strcmp(s, "__weakref__") == 0)) |
| 2088 | continue; |
Jeremy Hylton | 3e0055f | 2005-10-20 19:59:25 +0000 | [diff] [blame] | 2089 | tmp =_Py_Mangle(name, tmp); |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 2090 | if (!tmp) |
| 2091 | goto bad_slots; |
Žiga Seilnacht | 6f2d09c | 2007-03-16 11:59:38 +0000 | [diff] [blame] | 2092 | PyList_SET_ITEM(newslots, j, tmp); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2093 | j++; |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2094 | } |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2095 | assert(j == nslots - add_dict - add_weak); |
| 2096 | nslots = j; |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2097 | Py_DECREF(slots); |
Žiga Seilnacht | 6f2d09c | 2007-03-16 11:59:38 +0000 | [diff] [blame] | 2098 | if (PyList_Sort(newslots) == -1) { |
| 2099 | Py_DECREF(bases); |
| 2100 | Py_DECREF(newslots); |
| 2101 | return NULL; |
| 2102 | } |
| 2103 | slots = PyList_AsTuple(newslots); |
| 2104 | Py_DECREF(newslots); |
| 2105 | if (slots == NULL) { |
| 2106 | Py_DECREF(bases); |
| 2107 | return NULL; |
| 2108 | } |
Raymond Hettinger | 0ae0c07 | 2002-06-20 22:23:15 +0000 | [diff] [blame] | 2109 | |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2110 | /* Secondary bases may provide weakrefs or dict */ |
| 2111 | if (nbases > 1 && |
| 2112 | ((may_add_dict && !add_dict) || |
| 2113 | (may_add_weak && !add_weak))) { |
| 2114 | for (i = 0; i < nbases; i++) { |
| 2115 | tmp = PyTuple_GET_ITEM(bases, i); |
| 2116 | if (tmp == (PyObject *)base) |
| 2117 | continue; /* Skip primary base */ |
| 2118 | if (PyClass_Check(tmp)) { |
| 2119 | /* Classic base class provides both */ |
| 2120 | if (may_add_dict && !add_dict) |
| 2121 | add_dict++; |
| 2122 | if (may_add_weak && !add_weak) |
| 2123 | add_weak++; |
| 2124 | break; |
| 2125 | } |
| 2126 | assert(PyType_Check(tmp)); |
| 2127 | tmptype = (PyTypeObject *)tmp; |
| 2128 | if (may_add_dict && !add_dict && |
| 2129 | tmptype->tp_dictoffset != 0) |
| 2130 | add_dict++; |
| 2131 | if (may_add_weak && !add_weak && |
| 2132 | tmptype->tp_weaklistoffset != 0) |
| 2133 | add_weak++; |
| 2134 | if (may_add_dict && !add_dict) |
| 2135 | continue; |
| 2136 | if (may_add_weak && !add_weak) |
| 2137 | continue; |
| 2138 | /* Nothing more to check */ |
| 2139 | break; |
| 2140 | } |
| 2141 | } |
Guido van Rossum | 9676b22 | 2001-08-17 20:32:36 +0000 | [diff] [blame] | 2142 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2143 | |
| 2144 | /* XXX From here until type is safely allocated, |
| 2145 | "return NULL" may leak slots! */ |
| 2146 | |
| 2147 | /* Allocate the type object */ |
| 2148 | type = (PyTypeObject *)metatype->tp_alloc(metatype, nslots); |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2149 | if (type == NULL) { |
| 2150 | Py_XDECREF(slots); |
Michael W. Hudson | a6a277d | 2003-08-08 13:57:22 +0000 | [diff] [blame] | 2151 | Py_DECREF(bases); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2152 | return NULL; |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2153 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2154 | |
| 2155 | /* Keep name and slots alive in the extended type object */ |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2156 | et = (PyHeapTypeObject *)type; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2157 | Py_INCREF(name); |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 2158 | et->ht_name = name; |
| 2159 | et->ht_slots = slots; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2160 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 2161 | /* Initialize tp_flags */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2162 | type->tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HEAPTYPE | |
| 2163 | Py_TPFLAGS_BASETYPE; |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2164 | if (base->tp_flags & Py_TPFLAGS_HAVE_GC) |
| 2165 | type->tp_flags |= Py_TPFLAGS_HAVE_GC; |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 2166 | |
| 2167 | /* It's a new-style number unless it specifically inherits any |
| 2168 | old-style numeric behavior */ |
| 2169 | if ((base->tp_flags & Py_TPFLAGS_CHECKTYPES) || |
| 2170 | (base->tp_as_number == NULL)) |
| 2171 | type->tp_flags |= Py_TPFLAGS_CHECKTYPES; |
| 2172 | |
| 2173 | /* Initialize essential fields */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2174 | type->tp_as_number = &et->as_number; |
| 2175 | type->tp_as_sequence = &et->as_sequence; |
| 2176 | type->tp_as_mapping = &et->as_mapping; |
| 2177 | type->tp_as_buffer = &et->as_buffer; |
| 2178 | type->tp_name = PyString_AS_STRING(name); |
| 2179 | |
| 2180 | /* Set tp_base and tp_bases */ |
| 2181 | type->tp_bases = bases; |
| 2182 | Py_INCREF(base); |
| 2183 | type->tp_base = base; |
| 2184 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 2185 | /* Initialize tp_dict from passed-in dict */ |
| 2186 | type->tp_dict = dict = PyDict_Copy(dict); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2187 | if (dict == NULL) { |
| 2188 | Py_DECREF(type); |
| 2189 | return NULL; |
| 2190 | } |
| 2191 | |
Guido van Rossum | c354221 | 2001-08-16 09:18:56 +0000 | [diff] [blame] | 2192 | /* Set __module__ in the dict */ |
| 2193 | if (PyDict_GetItemString(dict, "__module__") == NULL) { |
| 2194 | tmp = PyEval_GetGlobals(); |
| 2195 | if (tmp != NULL) { |
| 2196 | tmp = PyDict_GetItemString(tmp, "__name__"); |
| 2197 | if (tmp != NULL) { |
| 2198 | if (PyDict_SetItemString(dict, "__module__", |
| 2199 | tmp) < 0) |
| 2200 | return NULL; |
| 2201 | } |
| 2202 | } |
| 2203 | } |
| 2204 | |
Tim Peters | 2f93e28 | 2001-10-04 05:27:00 +0000 | [diff] [blame] | 2205 | /* 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] | 2206 | and is a string. The __doc__ accessor will first look for tp_doc; |
| 2207 | if that fails, it will still look into __dict__. |
Tim Peters | 2f93e28 | 2001-10-04 05:27:00 +0000 | [diff] [blame] | 2208 | */ |
| 2209 | { |
| 2210 | PyObject *doc = PyDict_GetItemString(dict, "__doc__"); |
| 2211 | if (doc != NULL && PyString_Check(doc)) { |
| 2212 | const size_t n = (size_t)PyString_GET_SIZE(doc); |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 2213 | char *tp_doc = (char *)PyObject_MALLOC(n+1); |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 2214 | if (tp_doc == NULL) { |
Tim Peters | 2f93e28 | 2001-10-04 05:27:00 +0000 | [diff] [blame] | 2215 | Py_DECREF(type); |
| 2216 | return NULL; |
| 2217 | } |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 2218 | memcpy(tp_doc, PyString_AS_STRING(doc), n+1); |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 2219 | type->tp_doc = tp_doc; |
Tim Peters | 2f93e28 | 2001-10-04 05:27:00 +0000 | [diff] [blame] | 2220 | } |
| 2221 | } |
| 2222 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2223 | /* Special-case __new__: if it's a plain function, |
| 2224 | make it a static function */ |
| 2225 | tmp = PyDict_GetItemString(dict, "__new__"); |
| 2226 | if (tmp != NULL && PyFunction_Check(tmp)) { |
| 2227 | tmp = PyStaticMethod_New(tmp); |
| 2228 | if (tmp == NULL) { |
| 2229 | Py_DECREF(type); |
| 2230 | return NULL; |
| 2231 | } |
| 2232 | PyDict_SetItemString(dict, "__new__", tmp); |
| 2233 | Py_DECREF(tmp); |
| 2234 | } |
| 2235 | |
| 2236 | /* Add descriptors for custom slots from __slots__, or for __dict__ */ |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2237 | mp = PyHeapType_GET_MEMBERS(et); |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 2238 | slotoffset = base->tp_basicsize; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2239 | if (slots != NULL) { |
| 2240 | for (i = 0; i < nslots; i++, mp++) { |
| 2241 | mp->name = PyString_AS_STRING( |
| 2242 | PyTuple_GET_ITEM(slots, i)); |
Guido van Rossum | 64b206c | 2001-12-04 17:13:22 +0000 | [diff] [blame] | 2243 | mp->type = T_OBJECT_EX; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2244 | mp->offset = slotoffset; |
Žiga Seilnacht | 8903208 | 2007-03-11 15:54:54 +0000 | [diff] [blame] | 2245 | |
| 2246 | /* __dict__ and __weakref__ are already filtered out */ |
| 2247 | assert(strcmp(mp->name, "__dict__") != 0); |
| 2248 | assert(strcmp(mp->name, "__weakref__") != 0); |
| 2249 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2250 | slotoffset += sizeof(PyObject *); |
| 2251 | } |
| 2252 | } |
Guido van Rossum | ad47da0 | 2002-08-12 19:05:44 +0000 | [diff] [blame] | 2253 | if (add_dict) { |
| 2254 | if (base->tp_itemsize) |
| 2255 | type->tp_dictoffset = -(long)sizeof(PyObject *); |
| 2256 | else |
| 2257 | type->tp_dictoffset = slotoffset; |
| 2258 | slotoffset += sizeof(PyObject *); |
| 2259 | } |
| 2260 | if (add_weak) { |
| 2261 | assert(!base->tp_itemsize); |
| 2262 | type->tp_weaklistoffset = slotoffset; |
| 2263 | slotoffset += sizeof(PyObject *); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2264 | } |
| 2265 | type->tp_basicsize = slotoffset; |
Guido van Rossum | 6fb3fde | 2001-08-30 20:00:07 +0000 | [diff] [blame] | 2266 | type->tp_itemsize = base->tp_itemsize; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2267 | type->tp_members = PyHeapType_GET_MEMBERS(et); |
Guido van Rossum | 373c741 | 2003-01-07 13:41:37 +0000 | [diff] [blame] | 2268 | |
| 2269 | if (type->tp_weaklistoffset && type->tp_dictoffset) |
| 2270 | type->tp_getset = subtype_getsets_full; |
| 2271 | else if (type->tp_weaklistoffset && !type->tp_dictoffset) |
| 2272 | type->tp_getset = subtype_getsets_weakref_only; |
| 2273 | else if (!type->tp_weaklistoffset && type->tp_dictoffset) |
| 2274 | type->tp_getset = subtype_getsets_dict_only; |
| 2275 | else |
| 2276 | type->tp_getset = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2277 | |
| 2278 | /* Special case some slots */ |
| 2279 | if (type->tp_dictoffset != 0 || nslots > 0) { |
| 2280 | if (base->tp_getattr == NULL && base->tp_getattro == NULL) |
| 2281 | type->tp_getattro = PyObject_GenericGetAttr; |
| 2282 | if (base->tp_setattr == NULL && base->tp_setattro == NULL) |
| 2283 | type->tp_setattro = PyObject_GenericSetAttr; |
| 2284 | } |
| 2285 | type->tp_dealloc = subtype_dealloc; |
| 2286 | |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 2287 | /* Enable GC unless there are really no instance variables possible */ |
| 2288 | if (!(type->tp_basicsize == sizeof(PyObject) && |
| 2289 | type->tp_itemsize == 0)) |
| 2290 | type->tp_flags |= Py_TPFLAGS_HAVE_GC; |
| 2291 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2292 | /* Always override allocation strategy to use regular heap */ |
| 2293 | type->tp_alloc = PyType_GenericAlloc; |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2294 | if (type->tp_flags & Py_TPFLAGS_HAVE_GC) { |
Neil Schemenauer | 09a2ae5 | 2002-04-12 03:06:53 +0000 | [diff] [blame] | 2295 | type->tp_free = PyObject_GC_Del; |
Guido van Rossum | 9475a23 | 2001-10-05 20:51:39 +0000 | [diff] [blame] | 2296 | type->tp_traverse = subtype_traverse; |
Guido van Rossum | 9923ffe | 2002-06-04 19:52:53 +0000 | [diff] [blame] | 2297 | type->tp_clear = subtype_clear; |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2298 | } |
| 2299 | else |
Neil Schemenauer | 09a2ae5 | 2002-04-12 03:06:53 +0000 | [diff] [blame] | 2300 | type->tp_free = PyObject_Del; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2301 | |
| 2302 | /* Initialize the rest */ |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 2303 | if (PyType_Ready(type) < 0) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2304 | Py_DECREF(type); |
| 2305 | return NULL; |
| 2306 | } |
| 2307 | |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 2308 | /* Put the proper slots in place */ |
| 2309 | fixup_slot_dispatchers(type); |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 2310 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2311 | return (PyObject *)type; |
| 2312 | } |
| 2313 | |
| 2314 | /* Internal API to look for a name through the MRO. |
| 2315 | This returns a borrowed reference, and doesn't set an exception! */ |
| 2316 | PyObject * |
| 2317 | _PyType_Lookup(PyTypeObject *type, PyObject *name) |
| 2318 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 2319 | Py_ssize_t i, n; |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 2320 | PyObject *mro, *res, *base, *dict; |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 2321 | unsigned int h; |
| 2322 | |
| 2323 | if (MCACHE_CACHEABLE_NAME(name) && |
Neal Norwitz | e7bb918 | 2008-01-27 17:10:14 +0000 | [diff] [blame^] | 2324 | PyType_HasFeature(type, Py_TPFLAGS_VALID_VERSION_TAG)) { |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 2325 | /* fast path */ |
| 2326 | h = MCACHE_HASH_METHOD(type, name); |
| 2327 | if (method_cache[h].version == type->tp_version_tag && |
| 2328 | method_cache[h].name == name) |
| 2329 | return method_cache[h].value; |
| 2330 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2331 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 2332 | /* Look in tp_dict of types in MRO */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2333 | mro = type->tp_mro; |
Guido van Rossum | 2309498 | 2002-06-10 14:30:43 +0000 | [diff] [blame] | 2334 | |
| 2335 | /* If mro is NULL, the type is either not yet initialized |
| 2336 | by PyType_Ready(), or already cleared by type_clear(). |
| 2337 | Either way the safest thing to do is to return NULL. */ |
| 2338 | if (mro == NULL) |
| 2339 | return NULL; |
| 2340 | |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 2341 | res = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2342 | assert(PyTuple_Check(mro)); |
| 2343 | n = PyTuple_GET_SIZE(mro); |
| 2344 | for (i = 0; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 2345 | base = PyTuple_GET_ITEM(mro, i); |
| 2346 | if (PyClass_Check(base)) |
| 2347 | dict = ((PyClassObject *)base)->cl_dict; |
| 2348 | else { |
| 2349 | assert(PyType_Check(base)); |
| 2350 | dict = ((PyTypeObject *)base)->tp_dict; |
| 2351 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2352 | assert(dict && PyDict_Check(dict)); |
| 2353 | res = PyDict_GetItem(dict, name); |
| 2354 | if (res != NULL) |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 2355 | break; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2356 | } |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 2357 | |
| 2358 | if (MCACHE_CACHEABLE_NAME(name) && assign_version_tag(type)) { |
| 2359 | h = MCACHE_HASH_METHOD(type, name); |
| 2360 | method_cache[h].version = type->tp_version_tag; |
| 2361 | method_cache[h].value = res; /* borrowed */ |
| 2362 | Py_INCREF(name); |
| 2363 | Py_DECREF(method_cache[h].name); |
| 2364 | method_cache[h].name = name; |
| 2365 | } |
| 2366 | return res; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2367 | } |
| 2368 | |
| 2369 | /* This is similar to PyObject_GenericGetAttr(), |
| 2370 | but uses _PyType_Lookup() instead of just looking in type->tp_dict. */ |
| 2371 | static PyObject * |
| 2372 | type_getattro(PyTypeObject *type, PyObject *name) |
| 2373 | { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2374 | PyTypeObject *metatype = Py_TYPE(type); |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2375 | PyObject *meta_attribute, *attribute; |
| 2376 | descrgetfunc meta_get; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2377 | |
| 2378 | /* Initialize this type (we'll assume the metatype is initialized) */ |
| 2379 | if (type->tp_dict == NULL) { |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 2380 | if (PyType_Ready(type) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2381 | return NULL; |
| 2382 | } |
| 2383 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2384 | /* No readable descriptor found yet */ |
| 2385 | meta_get = NULL; |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 2386 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2387 | /* Look for the attribute in the metatype */ |
| 2388 | meta_attribute = _PyType_Lookup(metatype, name); |
| 2389 | |
| 2390 | if (meta_attribute != NULL) { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2391 | meta_get = Py_TYPE(meta_attribute)->tp_descr_get; |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 2392 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2393 | if (meta_get != NULL && PyDescr_IsData(meta_attribute)) { |
| 2394 | /* Data descriptors implement tp_descr_set to intercept |
| 2395 | * writes. Assume the attribute is not overridden in |
| 2396 | * type's tp_dict (and bases): call the descriptor now. |
| 2397 | */ |
| 2398 | return meta_get(meta_attribute, (PyObject *)type, |
| 2399 | (PyObject *)metatype); |
| 2400 | } |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 2401 | Py_INCREF(meta_attribute); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2402 | } |
| 2403 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2404 | /* No data descriptor found on metatype. Look in tp_dict of this |
| 2405 | * type and its bases */ |
| 2406 | attribute = _PyType_Lookup(type, name); |
| 2407 | if (attribute != NULL) { |
| 2408 | /* Implement descriptor functionality, if any */ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2409 | descrgetfunc local_get = Py_TYPE(attribute)->tp_descr_get; |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 2410 | |
| 2411 | Py_XDECREF(meta_attribute); |
| 2412 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2413 | if (local_get != NULL) { |
| 2414 | /* NULL 2nd argument indicates the descriptor was |
| 2415 | * found on the target object itself (or a base) */ |
| 2416 | return local_get(attribute, (PyObject *)NULL, |
| 2417 | (PyObject *)type); |
| 2418 | } |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 2419 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2420 | Py_INCREF(attribute); |
| 2421 | return attribute; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2422 | } |
| 2423 | |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2424 | /* No attribute found in local __dict__ (or bases): use the |
| 2425 | * descriptor from the metatype, if any */ |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 2426 | if (meta_get != NULL) { |
| 2427 | PyObject *res; |
| 2428 | res = meta_get(meta_attribute, (PyObject *)type, |
| 2429 | (PyObject *)metatype); |
| 2430 | Py_DECREF(meta_attribute); |
| 2431 | return res; |
| 2432 | } |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2433 | |
| 2434 | /* If an ordinary attribute was found on the metatype, return it now */ |
| 2435 | if (meta_attribute != NULL) { |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2436 | return meta_attribute; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2437 | } |
| 2438 | |
| 2439 | /* Give up */ |
| 2440 | PyErr_Format(PyExc_AttributeError, |
Guido van Rossum | bfc2e5e | 2002-04-04 17:50:54 +0000 | [diff] [blame] | 2441 | "type object '%.50s' has no attribute '%.400s'", |
| 2442 | type->tp_name, PyString_AS_STRING(name)); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2443 | return NULL; |
| 2444 | } |
| 2445 | |
| 2446 | static int |
| 2447 | type_setattro(PyTypeObject *type, PyObject *name, PyObject *value) |
| 2448 | { |
Guido van Rossum | 2f3ca6e | 2001-10-15 21:05:10 +0000 | [diff] [blame] | 2449 | if (!(type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
| 2450 | PyErr_Format( |
| 2451 | PyExc_TypeError, |
| 2452 | "can't set attributes of built-in/extension type '%s'", |
| 2453 | type->tp_name); |
| 2454 | return -1; |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 2455 | } |
Guido van Rossum | 2f3ca6e | 2001-10-15 21:05:10 +0000 | [diff] [blame] | 2456 | if (PyObject_GenericSetAttr((PyObject *)type, name, value) < 0) |
| 2457 | return -1; |
| 2458 | return update_slot(type, name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2459 | } |
| 2460 | |
| 2461 | static void |
| 2462 | type_dealloc(PyTypeObject *type) |
| 2463 | { |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2464 | PyHeapTypeObject *et; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2465 | |
| 2466 | /* Assert this is a heap-allocated type object */ |
| 2467 | assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2468 | _PyObject_GC_UNTRACK(type); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2469 | PyObject_ClearWeakRefs((PyObject *)type); |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2470 | et = (PyHeapTypeObject *)type; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2471 | Py_XDECREF(type->tp_base); |
| 2472 | Py_XDECREF(type->tp_dict); |
| 2473 | Py_XDECREF(type->tp_bases); |
| 2474 | Py_XDECREF(type->tp_mro); |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 2475 | Py_XDECREF(type->tp_cache); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2476 | Py_XDECREF(type->tp_subclasses); |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 2477 | /* A type's tp_doc is heap allocated, unlike the tp_doc slots |
| 2478 | * of most other objects. It's okay to cast it to char *. |
| 2479 | */ |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 2480 | PyObject_Free((char *)type->tp_doc); |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 2481 | Py_XDECREF(et->ht_name); |
| 2482 | Py_XDECREF(et->ht_slots); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2483 | Py_TYPE(type)->tp_free((PyObject *)type); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2484 | } |
| 2485 | |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2486 | static PyObject * |
| 2487 | type_subclasses(PyTypeObject *type, PyObject *args_ignored) |
| 2488 | { |
| 2489 | PyObject *list, *raw, *ref; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 2490 | Py_ssize_t i, n; |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2491 | |
| 2492 | list = PyList_New(0); |
| 2493 | if (list == NULL) |
| 2494 | return NULL; |
| 2495 | raw = type->tp_subclasses; |
| 2496 | if (raw == NULL) |
| 2497 | return list; |
| 2498 | assert(PyList_Check(raw)); |
| 2499 | n = PyList_GET_SIZE(raw); |
| 2500 | for (i = 0; i < n; i++) { |
| 2501 | ref = PyList_GET_ITEM(raw, i); |
Tim Peters | 4438338 | 2001-10-08 16:49:26 +0000 | [diff] [blame] | 2502 | assert(PyWeakref_CheckRef(ref)); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2503 | ref = PyWeakref_GET_OBJECT(ref); |
| 2504 | if (ref != Py_None) { |
| 2505 | if (PyList_Append(list, ref) < 0) { |
| 2506 | Py_DECREF(list); |
| 2507 | return NULL; |
| 2508 | } |
| 2509 | } |
| 2510 | } |
| 2511 | return list; |
| 2512 | } |
| 2513 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2514 | static PyMethodDef type_methods[] = { |
Martin v. Löwis | e3eb1f2 | 2001-08-16 13:15:00 +0000 | [diff] [blame] | 2515 | {"mro", (PyCFunction)mro_external, METH_NOARGS, |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 2516 | PyDoc_STR("mro() -> list\nreturn a type's method resolution order")}, |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2517 | {"__subclasses__", (PyCFunction)type_subclasses, METH_NOARGS, |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 2518 | PyDoc_STR("__subclasses__() -> list of immediate subclasses")}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2519 | {0} |
| 2520 | }; |
| 2521 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 2522 | PyDoc_STRVAR(type_doc, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2523 | "type(object) -> the object's type\n" |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 2524 | "type(name, bases, dict) -> a new type"); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2525 | |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2526 | static int |
| 2527 | type_traverse(PyTypeObject *type, visitproc visit, void *arg) |
| 2528 | { |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2529 | /* Because of type_is_gc(), the collector only calls this |
| 2530 | for heaptypes. */ |
| 2531 | assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2532 | |
Thomas Wouters | c6e5506 | 2006-04-15 21:47:09 +0000 | [diff] [blame] | 2533 | Py_VISIT(type->tp_dict); |
| 2534 | Py_VISIT(type->tp_cache); |
| 2535 | Py_VISIT(type->tp_mro); |
| 2536 | Py_VISIT(type->tp_bases); |
| 2537 | Py_VISIT(type->tp_base); |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2538 | |
| 2539 | /* There's no need to visit type->tp_subclasses or |
Georg Brandl | c255c7b | 2006-02-20 22:27:28 +0000 | [diff] [blame] | 2540 | ((PyHeapTypeObject *)type)->ht_slots, because they can't be involved |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2541 | in cycles; tp_subclasses is a list of weak references, |
| 2542 | and slots is a tuple of strings. */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2543 | |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2544 | return 0; |
| 2545 | } |
| 2546 | |
| 2547 | static int |
| 2548 | type_clear(PyTypeObject *type) |
| 2549 | { |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2550 | /* Because of type_is_gc(), the collector only calls this |
| 2551 | for heaptypes. */ |
| 2552 | assert(type->tp_flags & Py_TPFLAGS_HEAPTYPE); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2553 | |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2554 | /* The only field we need to clear is tp_mro, which is part of a |
| 2555 | hard cycle (its first element is the class itself) that won't |
| 2556 | be broken otherwise (it's a tuple and tuples don't have a |
| 2557 | tp_clear handler). None of the other fields need to be |
| 2558 | cleared, and here's why: |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2559 | |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2560 | tp_dict: |
| 2561 | It is a dict, so the collector will call its tp_clear. |
| 2562 | |
| 2563 | tp_cache: |
| 2564 | Not used; if it were, it would be a dict. |
| 2565 | |
| 2566 | tp_bases, tp_base: |
| 2567 | If these are involved in a cycle, there must be at least |
| 2568 | one other, mutable object in the cycle, e.g. a base |
| 2569 | class's dict; the cycle will be broken that way. |
| 2570 | |
| 2571 | tp_subclasses: |
| 2572 | A list of weak references can't be part of a cycle; and |
| 2573 | lists have their own tp_clear. |
| 2574 | |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2575 | slots (in PyHeapTypeObject): |
Guido van Rossum | a386209 | 2002-06-10 15:24:42 +0000 | [diff] [blame] | 2576 | A tuple of strings can't be part of a cycle. |
| 2577 | */ |
| 2578 | |
Thomas Wouters | edf17d8 | 2006-04-15 17:28:34 +0000 | [diff] [blame] | 2579 | Py_CLEAR(type->tp_mro); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2580 | |
| 2581 | return 0; |
| 2582 | } |
| 2583 | |
| 2584 | static int |
| 2585 | type_is_gc(PyTypeObject *type) |
| 2586 | { |
| 2587 | return type->tp_flags & Py_TPFLAGS_HEAPTYPE; |
| 2588 | } |
| 2589 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 2590 | PyTypeObject PyType_Type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 2591 | PyVarObject_HEAD_INIT(&PyType_Type, 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2592 | "type", /* tp_name */ |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 2593 | sizeof(PyHeapTypeObject), /* tp_basicsize */ |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 2594 | sizeof(PyMemberDef), /* tp_itemsize */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2595 | (destructor)type_dealloc, /* tp_dealloc */ |
| 2596 | 0, /* tp_print */ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 2597 | 0, /* tp_getattr */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2598 | 0, /* tp_setattr */ |
| 2599 | type_compare, /* tp_compare */ |
| 2600 | (reprfunc)type_repr, /* tp_repr */ |
| 2601 | 0, /* tp_as_number */ |
| 2602 | 0, /* tp_as_sequence */ |
| 2603 | 0, /* tp_as_mapping */ |
| 2604 | (hashfunc)_Py_HashPointer, /* tp_hash */ |
| 2605 | (ternaryfunc)type_call, /* tp_call */ |
| 2606 | 0, /* tp_str */ |
| 2607 | (getattrofunc)type_getattro, /* tp_getattro */ |
| 2608 | (setattrofunc)type_setattro, /* tp_setattro */ |
| 2609 | 0, /* tp_as_buffer */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2610 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
Neal Norwitz | ee3a1b5 | 2007-02-25 19:44:48 +0000 | [diff] [blame] | 2611 | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_TYPE_SUBCLASS, /* tp_flags */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2612 | type_doc, /* tp_doc */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2613 | (traverseproc)type_traverse, /* tp_traverse */ |
| 2614 | (inquiry)type_clear, /* tp_clear */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2615 | 0, /* tp_richcompare */ |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 2616 | offsetof(PyTypeObject, tp_weaklist), /* tp_weaklistoffset */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2617 | 0, /* tp_iter */ |
| 2618 | 0, /* tp_iternext */ |
| 2619 | type_methods, /* tp_methods */ |
| 2620 | type_members, /* tp_members */ |
| 2621 | type_getsets, /* tp_getset */ |
| 2622 | 0, /* tp_base */ |
| 2623 | 0, /* tp_dict */ |
| 2624 | 0, /* tp_descr_get */ |
| 2625 | 0, /* tp_descr_set */ |
| 2626 | offsetof(PyTypeObject, tp_dict), /* tp_dictoffset */ |
Guido van Rossum | f102e24 | 2007-03-23 18:53:03 +0000 | [diff] [blame] | 2627 | type_init, /* tp_init */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2628 | 0, /* tp_alloc */ |
| 2629 | type_new, /* tp_new */ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 2630 | PyObject_GC_Del, /* tp_free */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 2631 | (inquiry)type_is_gc, /* tp_is_gc */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 2632 | }; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2633 | |
| 2634 | |
| 2635 | /* The base type of all types (eventually)... except itself. */ |
| 2636 | |
Guido van Rossum | 143b564 | 2007-03-23 04:58:42 +0000 | [diff] [blame] | 2637 | /* You may wonder why object.__new__() only complains about arguments |
| 2638 | when object.__init__() is not overridden, and vice versa. |
| 2639 | |
| 2640 | Consider the use cases: |
| 2641 | |
| 2642 | 1. When neither is overridden, we want to hear complaints about |
| 2643 | excess (i.e., any) arguments, since their presence could |
| 2644 | indicate there's a bug. |
| 2645 | |
| 2646 | 2. When defining an Immutable type, we are likely to override only |
| 2647 | __new__(), since __init__() is called too late to initialize an |
| 2648 | Immutable object. Since __new__() defines the signature for the |
| 2649 | type, it would be a pain to have to override __init__() just to |
| 2650 | stop it from complaining about excess arguments. |
| 2651 | |
| 2652 | 3. When defining a Mutable type, we are likely to override only |
| 2653 | __init__(). So here the converse reasoning applies: we don't |
| 2654 | want to have to override __new__() just to stop it from |
| 2655 | complaining. |
| 2656 | |
| 2657 | 4. When __init__() is overridden, and the subclass __init__() calls |
| 2658 | object.__init__(), the latter should complain about excess |
| 2659 | arguments; ditto for __new__(). |
| 2660 | |
| 2661 | Use cases 2 and 3 make it unattractive to unconditionally check for |
| 2662 | excess arguments. The best solution that addresses all four use |
| 2663 | cases is as follows: __init__() complains about excess arguments |
| 2664 | unless __new__() is overridden and __init__() is not overridden |
| 2665 | (IOW, if __init__() is overridden or __new__() is not overridden); |
| 2666 | symmetrically, __new__() complains about excess arguments unless |
| 2667 | __init__() is overridden and __new__() is not overridden |
| 2668 | (IOW, if __new__() is overridden or __init__() is not overridden). |
| 2669 | |
| 2670 | However, for backwards compatibility, this breaks too much code. |
| 2671 | Therefore, in 2.6, we'll *warn* about excess arguments when both |
| 2672 | methods are overridden; for all other cases we'll use the above |
| 2673 | rules. |
| 2674 | |
| 2675 | */ |
| 2676 | |
| 2677 | /* Forward */ |
| 2678 | static PyObject * |
| 2679 | object_new(PyTypeObject *type, PyObject *args, PyObject *kwds); |
| 2680 | |
| 2681 | static int |
| 2682 | excess_args(PyObject *args, PyObject *kwds) |
| 2683 | { |
| 2684 | return PyTuple_GET_SIZE(args) || |
| 2685 | (kwds && PyDict_Check(kwds) && PyDict_Size(kwds)); |
| 2686 | } |
| 2687 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2688 | static int |
| 2689 | object_init(PyObject *self, PyObject *args, PyObject *kwds) |
| 2690 | { |
Guido van Rossum | 143b564 | 2007-03-23 04:58:42 +0000 | [diff] [blame] | 2691 | int err = 0; |
| 2692 | if (excess_args(args, kwds)) { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2693 | PyTypeObject *type = Py_TYPE(self); |
Guido van Rossum | 143b564 | 2007-03-23 04:58:42 +0000 | [diff] [blame] | 2694 | if (type->tp_init != object_init && |
| 2695 | type->tp_new != object_new) |
| 2696 | { |
| 2697 | err = PyErr_WarnEx(PyExc_DeprecationWarning, |
| 2698 | "object.__init__() takes no parameters", |
| 2699 | 1); |
| 2700 | } |
| 2701 | else if (type->tp_init != object_init || |
| 2702 | type->tp_new == object_new) |
| 2703 | { |
| 2704 | PyErr_SetString(PyExc_TypeError, |
| 2705 | "object.__init__() takes no parameters"); |
| 2706 | err = -1; |
| 2707 | } |
| 2708 | } |
| 2709 | return err; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2710 | } |
| 2711 | |
Guido van Rossum | 298e421 | 2003-02-13 16:30:16 +0000 | [diff] [blame] | 2712 | static PyObject * |
| 2713 | object_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 2714 | { |
Guido van Rossum | 143b564 | 2007-03-23 04:58:42 +0000 | [diff] [blame] | 2715 | int err = 0; |
| 2716 | if (excess_args(args, kwds)) { |
| 2717 | if (type->tp_new != object_new && |
| 2718 | type->tp_init != object_init) |
| 2719 | { |
| 2720 | err = PyErr_WarnEx(PyExc_DeprecationWarning, |
| 2721 | "object.__new__() takes no parameters", |
| 2722 | 1); |
| 2723 | } |
| 2724 | else if (type->tp_new != object_new || |
| 2725 | type->tp_init == object_init) |
| 2726 | { |
| 2727 | PyErr_SetString(PyExc_TypeError, |
| 2728 | "object.__new__() takes no parameters"); |
| 2729 | err = -1; |
| 2730 | } |
Guido van Rossum | 298e421 | 2003-02-13 16:30:16 +0000 | [diff] [blame] | 2731 | } |
Guido van Rossum | 143b564 | 2007-03-23 04:58:42 +0000 | [diff] [blame] | 2732 | if (err < 0) |
| 2733 | return NULL; |
Guido van Rossum | 298e421 | 2003-02-13 16:30:16 +0000 | [diff] [blame] | 2734 | return type->tp_alloc(type, 0); |
| 2735 | } |
| 2736 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2737 | static void |
| 2738 | object_dealloc(PyObject *self) |
| 2739 | { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2740 | Py_TYPE(self)->tp_free(self); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2741 | } |
| 2742 | |
Guido van Rossum | 8e24818 | 2001-08-12 05:17:56 +0000 | [diff] [blame] | 2743 | static PyObject * |
| 2744 | object_repr(PyObject *self) |
| 2745 | { |
Guido van Rossum | 76e6963 | 2001-08-16 18:52:43 +0000 | [diff] [blame] | 2746 | PyTypeObject *type; |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 2747 | PyObject *mod, *name, *rtn; |
Guido van Rossum | 8e24818 | 2001-08-12 05:17:56 +0000 | [diff] [blame] | 2748 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2749 | type = Py_TYPE(self); |
Guido van Rossum | 76e6963 | 2001-08-16 18:52:43 +0000 | [diff] [blame] | 2750 | mod = type_module(type, NULL); |
| 2751 | if (mod == NULL) |
| 2752 | PyErr_Clear(); |
| 2753 | else if (!PyString_Check(mod)) { |
| 2754 | Py_DECREF(mod); |
| 2755 | mod = NULL; |
| 2756 | } |
| 2757 | name = type_name(type, NULL); |
| 2758 | if (name == NULL) |
| 2759 | return NULL; |
| 2760 | if (mod != NULL && strcmp(PyString_AS_STRING(mod), "__builtin__")) |
Guido van Rossum | ff0e6d6 | 2001-09-24 16:03:59 +0000 | [diff] [blame] | 2761 | rtn = PyString_FromFormat("<%s.%s object at %p>", |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 2762 | PyString_AS_STRING(mod), |
| 2763 | PyString_AS_STRING(name), |
| 2764 | self); |
Guido van Rossum | 76e6963 | 2001-08-16 18:52:43 +0000 | [diff] [blame] | 2765 | else |
Guido van Rossum | ff0e6d6 | 2001-09-24 16:03:59 +0000 | [diff] [blame] | 2766 | rtn = PyString_FromFormat("<%s object at %p>", |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 2767 | type->tp_name, self); |
Guido van Rossum | 76e6963 | 2001-08-16 18:52:43 +0000 | [diff] [blame] | 2768 | Py_XDECREF(mod); |
| 2769 | Py_DECREF(name); |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 2770 | return rtn; |
Guido van Rossum | 8e24818 | 2001-08-12 05:17:56 +0000 | [diff] [blame] | 2771 | } |
| 2772 | |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 2773 | static PyObject * |
| 2774 | object_str(PyObject *self) |
| 2775 | { |
| 2776 | unaryfunc f; |
| 2777 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2778 | f = Py_TYPE(self)->tp_repr; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 2779 | if (f == NULL) |
| 2780 | f = object_repr; |
| 2781 | return f(self); |
| 2782 | } |
| 2783 | |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2784 | static PyObject * |
| 2785 | object_get_class(PyObject *self, void *closure) |
| 2786 | { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2787 | Py_INCREF(Py_TYPE(self)); |
| 2788 | return (PyObject *)(Py_TYPE(self)); |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2789 | } |
| 2790 | |
| 2791 | static int |
| 2792 | equiv_structs(PyTypeObject *a, PyTypeObject *b) |
| 2793 | { |
| 2794 | return a == b || |
| 2795 | (a != NULL && |
| 2796 | b != NULL && |
| 2797 | a->tp_basicsize == b->tp_basicsize && |
| 2798 | a->tp_itemsize == b->tp_itemsize && |
| 2799 | a->tp_dictoffset == b->tp_dictoffset && |
| 2800 | a->tp_weaklistoffset == b->tp_weaklistoffset && |
| 2801 | ((a->tp_flags & Py_TPFLAGS_HAVE_GC) == |
| 2802 | (b->tp_flags & Py_TPFLAGS_HAVE_GC))); |
| 2803 | } |
| 2804 | |
| 2805 | static int |
| 2806 | same_slots_added(PyTypeObject *a, PyTypeObject *b) |
| 2807 | { |
| 2808 | PyTypeObject *base = a->tp_base; |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 2809 | Py_ssize_t size; |
Žiga Seilnacht | 6f2d09c | 2007-03-16 11:59:38 +0000 | [diff] [blame] | 2810 | PyObject *slots_a, *slots_b; |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2811 | |
| 2812 | if (base != b->tp_base) |
| 2813 | return 0; |
| 2814 | if (equiv_structs(a, base) && equiv_structs(b, base)) |
| 2815 | return 1; |
| 2816 | size = base->tp_basicsize; |
| 2817 | if (a->tp_dictoffset == size && b->tp_dictoffset == size) |
| 2818 | size += sizeof(PyObject *); |
| 2819 | if (a->tp_weaklistoffset == size && b->tp_weaklistoffset == size) |
| 2820 | size += sizeof(PyObject *); |
Žiga Seilnacht | 6f2d09c | 2007-03-16 11:59:38 +0000 | [diff] [blame] | 2821 | |
| 2822 | /* Check slots compliance */ |
| 2823 | slots_a = ((PyHeapTypeObject *)a)->ht_slots; |
| 2824 | slots_b = ((PyHeapTypeObject *)b)->ht_slots; |
| 2825 | if (slots_a && slots_b) { |
| 2826 | if (PyObject_Compare(slots_a, slots_b) != 0) |
| 2827 | return 0; |
| 2828 | size += sizeof(PyObject *) * PyTuple_GET_SIZE(slots_a); |
| 2829 | } |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2830 | return size == a->tp_basicsize && size == b->tp_basicsize; |
| 2831 | } |
| 2832 | |
| 2833 | static int |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 2834 | compatible_for_assignment(PyTypeObject* oldto, PyTypeObject* newto, char* attr) |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2835 | { |
| 2836 | PyTypeObject *newbase, *oldbase; |
| 2837 | |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 2838 | if (newto->tp_dealloc != oldto->tp_dealloc || |
| 2839 | newto->tp_free != oldto->tp_free) |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2840 | { |
| 2841 | PyErr_Format(PyExc_TypeError, |
| 2842 | "%s assignment: " |
| 2843 | "'%s' deallocator differs from '%s'", |
| 2844 | attr, |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 2845 | newto->tp_name, |
| 2846 | oldto->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2847 | return 0; |
| 2848 | } |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 2849 | newbase = newto; |
| 2850 | oldbase = oldto; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2851 | while (equiv_structs(newbase, newbase->tp_base)) |
| 2852 | newbase = newbase->tp_base; |
| 2853 | while (equiv_structs(oldbase, oldbase->tp_base)) |
| 2854 | oldbase = oldbase->tp_base; |
| 2855 | if (newbase != oldbase && |
| 2856 | (newbase->tp_base != oldbase->tp_base || |
| 2857 | !same_slots_added(newbase, oldbase))) { |
| 2858 | PyErr_Format(PyExc_TypeError, |
| 2859 | "%s assignment: " |
| 2860 | "'%s' object layout differs from '%s'", |
| 2861 | attr, |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 2862 | newto->tp_name, |
| 2863 | oldto->tp_name); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2864 | return 0; |
| 2865 | } |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 2866 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2867 | return 1; |
| 2868 | } |
| 2869 | |
| 2870 | static int |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2871 | object_set_class(PyObject *self, PyObject *value, void *closure) |
| 2872 | { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2873 | PyTypeObject *oldto = Py_TYPE(self); |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 2874 | PyTypeObject *newto; |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2875 | |
Guido van Rossum | b6b8942 | 2002-04-15 01:03:30 +0000 | [diff] [blame] | 2876 | if (value == NULL) { |
| 2877 | PyErr_SetString(PyExc_TypeError, |
| 2878 | "can't delete __class__ attribute"); |
| 2879 | return -1; |
| 2880 | } |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2881 | if (!PyType_Check(value)) { |
| 2882 | PyErr_Format(PyExc_TypeError, |
| 2883 | "__class__ must be set to new-style class, not '%s' object", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2884 | Py_TYPE(value)->tp_name); |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2885 | return -1; |
| 2886 | } |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 2887 | newto = (PyTypeObject *)value; |
| 2888 | if (!(newto->tp_flags & Py_TPFLAGS_HEAPTYPE) || |
| 2889 | !(oldto->tp_flags & Py_TPFLAGS_HEAPTYPE)) |
Guido van Rossum | 40af889 | 2002-08-10 05:42:07 +0000 | [diff] [blame] | 2890 | { |
| 2891 | PyErr_Format(PyExc_TypeError, |
| 2892 | "__class__ assignment: only for heap types"); |
| 2893 | return -1; |
| 2894 | } |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 2895 | if (compatible_for_assignment(newto, oldto, "__class__")) { |
| 2896 | Py_INCREF(newto); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2897 | Py_TYPE(self) = newto; |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 2898 | Py_DECREF(oldto); |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 2899 | return 0; |
| 2900 | } |
| 2901 | else { |
Guido van Rossum | 9ee4b94 | 2002-05-24 18:47:47 +0000 | [diff] [blame] | 2902 | return -1; |
| 2903 | } |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 2904 | } |
| 2905 | |
| 2906 | static PyGetSetDef object_getsets[] = { |
| 2907 | {"__class__", object_get_class, object_set_class, |
Neal Norwitz | 858e34f | 2002-08-13 17:18:45 +0000 | [diff] [blame] | 2908 | PyDoc_STR("the object's class")}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 2909 | {0} |
| 2910 | }; |
| 2911 | |
Guido van Rossum | c53f009 | 2003-02-18 22:05:12 +0000 | [diff] [blame] | 2912 | |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 2913 | /* Stuff to implement __reduce_ex__ for pickle protocols >= 2. |
| 2914 | We fall back to helpers in copy_reg for: |
| 2915 | - pickle protocols < 2 |
| 2916 | - calculating the list of slot names (done only once per class) |
| 2917 | - the __newobj__ function (which is used as a token but never called) |
| 2918 | */ |
| 2919 | |
| 2920 | static PyObject * |
| 2921 | import_copy_reg(void) |
| 2922 | { |
| 2923 | static PyObject *copy_reg_str; |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 2924 | |
| 2925 | if (!copy_reg_str) { |
| 2926 | copy_reg_str = PyString_InternFromString("copy_reg"); |
| 2927 | if (copy_reg_str == NULL) |
| 2928 | return NULL; |
| 2929 | } |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 2930 | |
| 2931 | return PyImport_Import(copy_reg_str); |
| 2932 | } |
| 2933 | |
| 2934 | static PyObject * |
| 2935 | slotnames(PyObject *cls) |
| 2936 | { |
| 2937 | PyObject *clsdict; |
| 2938 | PyObject *copy_reg; |
| 2939 | PyObject *slotnames; |
| 2940 | |
| 2941 | if (!PyType_Check(cls)) { |
| 2942 | Py_INCREF(Py_None); |
| 2943 | return Py_None; |
| 2944 | } |
| 2945 | |
| 2946 | clsdict = ((PyTypeObject *)cls)->tp_dict; |
| 2947 | slotnames = PyDict_GetItemString(clsdict, "__slotnames__"); |
Armin Rigo | ec862b9 | 2005-09-24 22:58:41 +0000 | [diff] [blame] | 2948 | if (slotnames != NULL && PyList_Check(slotnames)) { |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 2949 | Py_INCREF(slotnames); |
| 2950 | return slotnames; |
| 2951 | } |
| 2952 | |
| 2953 | copy_reg = import_copy_reg(); |
| 2954 | if (copy_reg == NULL) |
| 2955 | return NULL; |
| 2956 | |
| 2957 | slotnames = PyObject_CallMethod(copy_reg, "_slotnames", "O", cls); |
| 2958 | Py_DECREF(copy_reg); |
| 2959 | if (slotnames != NULL && |
| 2960 | slotnames != Py_None && |
| 2961 | !PyList_Check(slotnames)) |
| 2962 | { |
| 2963 | PyErr_SetString(PyExc_TypeError, |
| 2964 | "copy_reg._slotnames didn't return a list or None"); |
| 2965 | Py_DECREF(slotnames); |
| 2966 | slotnames = NULL; |
| 2967 | } |
| 2968 | |
| 2969 | return slotnames; |
| 2970 | } |
| 2971 | |
| 2972 | static PyObject * |
| 2973 | reduce_2(PyObject *obj) |
| 2974 | { |
| 2975 | PyObject *cls, *getnewargs; |
| 2976 | PyObject *args = NULL, *args2 = NULL; |
| 2977 | PyObject *getstate = NULL, *state = NULL, *names = NULL; |
| 2978 | PyObject *slots = NULL, *listitems = NULL, *dictitems = NULL; |
| 2979 | PyObject *copy_reg = NULL, *newobj = NULL, *res = NULL; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 2980 | Py_ssize_t i, n; |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 2981 | |
| 2982 | cls = PyObject_GetAttrString(obj, "__class__"); |
| 2983 | if (cls == NULL) |
| 2984 | return NULL; |
| 2985 | |
| 2986 | getnewargs = PyObject_GetAttrString(obj, "__getnewargs__"); |
| 2987 | if (getnewargs != NULL) { |
| 2988 | args = PyObject_CallObject(getnewargs, NULL); |
| 2989 | Py_DECREF(getnewargs); |
| 2990 | if (args != NULL && !PyTuple_Check(args)) { |
Georg Brandl | ccff785 | 2006-06-18 22:17:29 +0000 | [diff] [blame] | 2991 | PyErr_Format(PyExc_TypeError, |
| 2992 | "__getnewargs__ should return a tuple, " |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 2993 | "not '%.200s'", Py_TYPE(args)->tp_name); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 2994 | goto end; |
| 2995 | } |
| 2996 | } |
| 2997 | else { |
| 2998 | PyErr_Clear(); |
| 2999 | args = PyTuple_New(0); |
| 3000 | } |
| 3001 | if (args == NULL) |
| 3002 | goto end; |
| 3003 | |
| 3004 | getstate = PyObject_GetAttrString(obj, "__getstate__"); |
| 3005 | if (getstate != NULL) { |
| 3006 | state = PyObject_CallObject(getstate, NULL); |
| 3007 | Py_DECREF(getstate); |
Neal Norwitz | e2fdc61 | 2003-06-08 13:19:58 +0000 | [diff] [blame] | 3008 | if (state == NULL) |
| 3009 | goto end; |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3010 | } |
| 3011 | else { |
Jim Fulton | 8a1a594 | 2004-02-08 04:21:26 +0000 | [diff] [blame] | 3012 | PyErr_Clear(); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3013 | state = PyObject_GetAttrString(obj, "__dict__"); |
| 3014 | if (state == NULL) { |
| 3015 | PyErr_Clear(); |
| 3016 | state = Py_None; |
| 3017 | Py_INCREF(state); |
| 3018 | } |
| 3019 | names = slotnames(cls); |
| 3020 | if (names == NULL) |
| 3021 | goto end; |
| 3022 | if (names != Py_None) { |
| 3023 | assert(PyList_Check(names)); |
| 3024 | slots = PyDict_New(); |
| 3025 | if (slots == NULL) |
| 3026 | goto end; |
| 3027 | n = 0; |
| 3028 | /* Can't pre-compute the list size; the list |
| 3029 | is stored on the class so accessible to other |
| 3030 | threads, which may be run by DECREF */ |
| 3031 | for (i = 0; i < PyList_GET_SIZE(names); i++) { |
| 3032 | PyObject *name, *value; |
| 3033 | name = PyList_GET_ITEM(names, i); |
| 3034 | value = PyObject_GetAttr(obj, name); |
| 3035 | if (value == NULL) |
| 3036 | PyErr_Clear(); |
| 3037 | else { |
| 3038 | int err = PyDict_SetItem(slots, name, |
| 3039 | value); |
| 3040 | Py_DECREF(value); |
| 3041 | if (err) |
| 3042 | goto end; |
| 3043 | n++; |
| 3044 | } |
| 3045 | } |
| 3046 | if (n) { |
| 3047 | state = Py_BuildValue("(NO)", state, slots); |
| 3048 | if (state == NULL) |
| 3049 | goto end; |
| 3050 | } |
| 3051 | } |
| 3052 | } |
| 3053 | |
| 3054 | if (!PyList_Check(obj)) { |
| 3055 | listitems = Py_None; |
| 3056 | Py_INCREF(listitems); |
| 3057 | } |
| 3058 | else { |
| 3059 | listitems = PyObject_GetIter(obj); |
| 3060 | if (listitems == NULL) |
| 3061 | goto end; |
| 3062 | } |
| 3063 | |
| 3064 | if (!PyDict_Check(obj)) { |
| 3065 | dictitems = Py_None; |
| 3066 | Py_INCREF(dictitems); |
| 3067 | } |
| 3068 | else { |
| 3069 | dictitems = PyObject_CallMethod(obj, "iteritems", ""); |
| 3070 | if (dictitems == NULL) |
| 3071 | goto end; |
| 3072 | } |
| 3073 | |
| 3074 | copy_reg = import_copy_reg(); |
| 3075 | if (copy_reg == NULL) |
| 3076 | goto end; |
| 3077 | newobj = PyObject_GetAttrString(copy_reg, "__newobj__"); |
| 3078 | if (newobj == NULL) |
| 3079 | goto end; |
| 3080 | |
| 3081 | n = PyTuple_GET_SIZE(args); |
| 3082 | args2 = PyTuple_New(n+1); |
| 3083 | if (args2 == NULL) |
| 3084 | goto end; |
| 3085 | PyTuple_SET_ITEM(args2, 0, cls); |
| 3086 | cls = NULL; |
| 3087 | for (i = 0; i < n; i++) { |
| 3088 | PyObject *v = PyTuple_GET_ITEM(args, i); |
| 3089 | Py_INCREF(v); |
| 3090 | PyTuple_SET_ITEM(args2, i+1, v); |
| 3091 | } |
| 3092 | |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 3093 | res = PyTuple_Pack(5, newobj, args2, state, listitems, dictitems); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3094 | |
| 3095 | end: |
| 3096 | Py_XDECREF(cls); |
| 3097 | Py_XDECREF(args); |
| 3098 | Py_XDECREF(args2); |
Jeremy Hylton | d06483c | 2003-04-09 21:01:42 +0000 | [diff] [blame] | 3099 | Py_XDECREF(slots); |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3100 | Py_XDECREF(state); |
| 3101 | Py_XDECREF(names); |
| 3102 | Py_XDECREF(listitems); |
| 3103 | Py_XDECREF(dictitems); |
| 3104 | Py_XDECREF(copy_reg); |
| 3105 | Py_XDECREF(newobj); |
| 3106 | return res; |
| 3107 | } |
| 3108 | |
Žiga Seilnacht | 20f43d3 | 2007-03-15 11:44:55 +0000 | [diff] [blame] | 3109 | /* |
| 3110 | * There were two problems when object.__reduce__ and object.__reduce_ex__ |
| 3111 | * were implemented in the same function: |
| 3112 | * - trying to pickle an object with a custom __reduce__ method that |
| 3113 | * fell back to object.__reduce__ in certain circumstances led to |
| 3114 | * infinite recursion at Python level and eventual RuntimeError. |
| 3115 | * - Pickling objects that lied about their type by overwriting the |
| 3116 | * __class__ descriptor could lead to infinite recursion at C level |
| 3117 | * and eventual segfault. |
| 3118 | * |
| 3119 | * Because of backwards compatibility, the two methods still have to |
| 3120 | * behave in the same way, even if this is not required by the pickle |
| 3121 | * protocol. This common functionality was moved to the _common_reduce |
| 3122 | * function. |
| 3123 | */ |
| 3124 | static PyObject * |
| 3125 | _common_reduce(PyObject *self, int proto) |
| 3126 | { |
| 3127 | PyObject *copy_reg, *res; |
| 3128 | |
| 3129 | if (proto >= 2) |
| 3130 | return reduce_2(self); |
| 3131 | |
| 3132 | copy_reg = import_copy_reg(); |
| 3133 | if (!copy_reg) |
| 3134 | return NULL; |
| 3135 | |
| 3136 | res = PyEval_CallMethod(copy_reg, "_reduce_ex", "(Oi)", self, proto); |
| 3137 | Py_DECREF(copy_reg); |
| 3138 | |
| 3139 | return res; |
| 3140 | } |
| 3141 | |
| 3142 | static PyObject * |
| 3143 | object_reduce(PyObject *self, PyObject *args) |
| 3144 | { |
| 3145 | int proto = 0; |
| 3146 | |
| 3147 | if (!PyArg_ParseTuple(args, "|i:__reduce__", &proto)) |
| 3148 | return NULL; |
| 3149 | |
| 3150 | return _common_reduce(self, proto); |
| 3151 | } |
| 3152 | |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3153 | static PyObject * |
| 3154 | object_reduce_ex(PyObject *self, PyObject *args) |
| 3155 | { |
Žiga Seilnacht | 20f43d3 | 2007-03-15 11:44:55 +0000 | [diff] [blame] | 3156 | PyObject *reduce, *res; |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3157 | int proto = 0; |
| 3158 | |
| 3159 | if (!PyArg_ParseTuple(args, "|i:__reduce_ex__", &proto)) |
| 3160 | return NULL; |
| 3161 | |
| 3162 | reduce = PyObject_GetAttrString(self, "__reduce__"); |
| 3163 | if (reduce == NULL) |
| 3164 | PyErr_Clear(); |
| 3165 | else { |
| 3166 | PyObject *cls, *clsreduce, *objreduce; |
| 3167 | int override; |
| 3168 | cls = PyObject_GetAttrString(self, "__class__"); |
| 3169 | if (cls == NULL) { |
| 3170 | Py_DECREF(reduce); |
| 3171 | return NULL; |
| 3172 | } |
| 3173 | clsreduce = PyObject_GetAttrString(cls, "__reduce__"); |
| 3174 | Py_DECREF(cls); |
| 3175 | if (clsreduce == NULL) { |
| 3176 | Py_DECREF(reduce); |
| 3177 | return NULL; |
| 3178 | } |
| 3179 | objreduce = PyDict_GetItemString(PyBaseObject_Type.tp_dict, |
| 3180 | "__reduce__"); |
| 3181 | override = (clsreduce != objreduce); |
| 3182 | Py_DECREF(clsreduce); |
| 3183 | if (override) { |
| 3184 | res = PyObject_CallObject(reduce, NULL); |
| 3185 | Py_DECREF(reduce); |
| 3186 | return res; |
| 3187 | } |
| 3188 | else |
| 3189 | Py_DECREF(reduce); |
| 3190 | } |
| 3191 | |
Žiga Seilnacht | 20f43d3 | 2007-03-15 11:44:55 +0000 | [diff] [blame] | 3192 | return _common_reduce(self, proto); |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 3193 | } |
| 3194 | |
| 3195 | static PyMethodDef object_methods[] = { |
Guido van Rossum | c53f009 | 2003-02-18 22:05:12 +0000 | [diff] [blame] | 3196 | {"__reduce_ex__", object_reduce_ex, METH_VARARGS, |
| 3197 | PyDoc_STR("helper for pickle")}, |
Žiga Seilnacht | 20f43d3 | 2007-03-15 11:44:55 +0000 | [diff] [blame] | 3198 | {"__reduce__", object_reduce, METH_VARARGS, |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 3199 | PyDoc_STR("helper for pickle")}, |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 3200 | {0} |
| 3201 | }; |
| 3202 | |
Guido van Rossum | 036f999 | 2003-02-21 22:02:54 +0000 | [diff] [blame] | 3203 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3204 | PyTypeObject PyBaseObject_Type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 3205 | PyVarObject_HEAD_INIT(&PyType_Type, 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3206 | "object", /* tp_name */ |
| 3207 | sizeof(PyObject), /* tp_basicsize */ |
| 3208 | 0, /* tp_itemsize */ |
Georg Brandl | 347b300 | 2006-03-30 11:57:00 +0000 | [diff] [blame] | 3209 | object_dealloc, /* tp_dealloc */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3210 | 0, /* tp_print */ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 3211 | 0, /* tp_getattr */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3212 | 0, /* tp_setattr */ |
| 3213 | 0, /* tp_compare */ |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3214 | object_repr, /* tp_repr */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3215 | 0, /* tp_as_number */ |
| 3216 | 0, /* tp_as_sequence */ |
| 3217 | 0, /* tp_as_mapping */ |
Guido van Rossum | 64c06e3 | 2007-11-22 00:55:51 +0000 | [diff] [blame] | 3218 | (hashfunc)_Py_HashPointer, /* tp_hash */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3219 | 0, /* tp_call */ |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3220 | object_str, /* tp_str */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3221 | PyObject_GenericGetAttr, /* tp_getattro */ |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3222 | PyObject_GenericSetAttr, /* tp_setattro */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3223 | 0, /* tp_as_buffer */ |
| 3224 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 3225 | PyDoc_STR("The most base type"), /* tp_doc */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3226 | 0, /* tp_traverse */ |
| 3227 | 0, /* tp_clear */ |
| 3228 | 0, /* tp_richcompare */ |
| 3229 | 0, /* tp_weaklistoffset */ |
| 3230 | 0, /* tp_iter */ |
| 3231 | 0, /* tp_iternext */ |
Guido van Rossum | 3926a63 | 2001-09-25 16:25:58 +0000 | [diff] [blame] | 3232 | object_methods, /* tp_methods */ |
Guido van Rossum | 5c294fb | 2001-09-25 03:43:42 +0000 | [diff] [blame] | 3233 | 0, /* tp_members */ |
| 3234 | object_getsets, /* tp_getset */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3235 | 0, /* tp_base */ |
| 3236 | 0, /* tp_dict */ |
| 3237 | 0, /* tp_descr_get */ |
| 3238 | 0, /* tp_descr_set */ |
| 3239 | 0, /* tp_dictoffset */ |
| 3240 | object_init, /* tp_init */ |
| 3241 | PyType_GenericAlloc, /* tp_alloc */ |
Guido van Rossum | 298e421 | 2003-02-13 16:30:16 +0000 | [diff] [blame] | 3242 | object_new, /* tp_new */ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 3243 | PyObject_Del, /* tp_free */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3244 | }; |
| 3245 | |
| 3246 | |
| 3247 | /* Initialize the __dict__ in a type object */ |
| 3248 | |
| 3249 | static int |
| 3250 | add_methods(PyTypeObject *type, PyMethodDef *meth) |
| 3251 | { |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3252 | PyObject *dict = type->tp_dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3253 | |
| 3254 | for (; meth->ml_name != NULL; meth++) { |
| 3255 | PyObject *descr; |
Raymond Hettinger | 8f5cdaa | 2003-12-13 11:26:12 +0000 | [diff] [blame] | 3256 | if (PyDict_GetItemString(dict, meth->ml_name) && |
| 3257 | !(meth->ml_flags & METH_COEXIST)) |
| 3258 | continue; |
Fred Drake | 7bf9715 | 2002-03-28 05:33:33 +0000 | [diff] [blame] | 3259 | if (meth->ml_flags & METH_CLASS) { |
| 3260 | if (meth->ml_flags & METH_STATIC) { |
| 3261 | PyErr_SetString(PyExc_ValueError, |
| 3262 | "method cannot be both class and static"); |
| 3263 | return -1; |
| 3264 | } |
Tim Peters | bca1cbc | 2002-12-09 22:56:13 +0000 | [diff] [blame] | 3265 | descr = PyDescr_NewClassMethod(type, meth); |
Fred Drake | 7bf9715 | 2002-03-28 05:33:33 +0000 | [diff] [blame] | 3266 | } |
| 3267 | else if (meth->ml_flags & METH_STATIC) { |
Guido van Rossum | 9af48ff | 2003-02-11 17:12:46 +0000 | [diff] [blame] | 3268 | PyObject *cfunc = PyCFunction_New(meth, NULL); |
| 3269 | if (cfunc == NULL) |
| 3270 | return -1; |
| 3271 | descr = PyStaticMethod_New(cfunc); |
| 3272 | Py_DECREF(cfunc); |
Fred Drake | 7bf9715 | 2002-03-28 05:33:33 +0000 | [diff] [blame] | 3273 | } |
| 3274 | else { |
| 3275 | descr = PyDescr_NewMethod(type, meth); |
| 3276 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3277 | if (descr == NULL) |
| 3278 | return -1; |
Fred Drake | 7bf9715 | 2002-03-28 05:33:33 +0000 | [diff] [blame] | 3279 | if (PyDict_SetItemString(dict, meth->ml_name, descr) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3280 | return -1; |
| 3281 | Py_DECREF(descr); |
| 3282 | } |
| 3283 | return 0; |
| 3284 | } |
| 3285 | |
| 3286 | static int |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 3287 | add_members(PyTypeObject *type, PyMemberDef *memb) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3288 | { |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3289 | PyObject *dict = type->tp_dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3290 | |
| 3291 | for (; memb->name != NULL; memb++) { |
| 3292 | PyObject *descr; |
| 3293 | if (PyDict_GetItemString(dict, memb->name)) |
| 3294 | continue; |
| 3295 | descr = PyDescr_NewMember(type, memb); |
| 3296 | if (descr == NULL) |
| 3297 | return -1; |
| 3298 | if (PyDict_SetItemString(dict, memb->name, descr) < 0) |
| 3299 | return -1; |
| 3300 | Py_DECREF(descr); |
| 3301 | } |
| 3302 | return 0; |
| 3303 | } |
| 3304 | |
| 3305 | static int |
Guido van Rossum | 32d34c8 | 2001-09-20 21:45:26 +0000 | [diff] [blame] | 3306 | add_getset(PyTypeObject *type, PyGetSetDef *gsp) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3307 | { |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3308 | PyObject *dict = type->tp_dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3309 | |
| 3310 | for (; gsp->name != NULL; gsp++) { |
| 3311 | PyObject *descr; |
| 3312 | if (PyDict_GetItemString(dict, gsp->name)) |
| 3313 | continue; |
| 3314 | descr = PyDescr_NewGetSet(type, gsp); |
| 3315 | |
| 3316 | if (descr == NULL) |
| 3317 | return -1; |
| 3318 | if (PyDict_SetItemString(dict, gsp->name, descr) < 0) |
| 3319 | return -1; |
| 3320 | Py_DECREF(descr); |
| 3321 | } |
| 3322 | return 0; |
| 3323 | } |
| 3324 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3325 | static void |
| 3326 | inherit_special(PyTypeObject *type, PyTypeObject *base) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3327 | { |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 3328 | Py_ssize_t oldsize, newsize; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3329 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3330 | /* Special flag magic */ |
| 3331 | if (!type->tp_as_buffer && base->tp_as_buffer) { |
| 3332 | type->tp_flags &= ~Py_TPFLAGS_HAVE_GETCHARBUFFER; |
| 3333 | type->tp_flags |= |
| 3334 | base->tp_flags & Py_TPFLAGS_HAVE_GETCHARBUFFER; |
| 3335 | } |
| 3336 | if (!type->tp_as_sequence && base->tp_as_sequence) { |
| 3337 | type->tp_flags &= ~Py_TPFLAGS_HAVE_SEQUENCE_IN; |
| 3338 | type->tp_flags |= base->tp_flags & Py_TPFLAGS_HAVE_SEQUENCE_IN; |
| 3339 | } |
| 3340 | if ((type->tp_flags & Py_TPFLAGS_HAVE_INPLACEOPS) != |
| 3341 | (base->tp_flags & Py_TPFLAGS_HAVE_INPLACEOPS)) { |
| 3342 | if ((!type->tp_as_number && base->tp_as_number) || |
| 3343 | (!type->tp_as_sequence && base->tp_as_sequence)) { |
| 3344 | type->tp_flags &= ~Py_TPFLAGS_HAVE_INPLACEOPS; |
| 3345 | if (!type->tp_as_number && !type->tp_as_sequence) { |
| 3346 | type->tp_flags |= base->tp_flags & |
| 3347 | Py_TPFLAGS_HAVE_INPLACEOPS; |
| 3348 | } |
| 3349 | } |
| 3350 | /* Wow */ |
| 3351 | } |
| 3352 | if (!type->tp_as_number && base->tp_as_number) { |
| 3353 | type->tp_flags &= ~Py_TPFLAGS_CHECKTYPES; |
| 3354 | type->tp_flags |= base->tp_flags & Py_TPFLAGS_CHECKTYPES; |
| 3355 | } |
| 3356 | |
| 3357 | /* Copying basicsize is connected to the GC flags */ |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 3358 | oldsize = base->tp_basicsize; |
| 3359 | newsize = type->tp_basicsize ? type->tp_basicsize : oldsize; |
| 3360 | if (!(type->tp_flags & Py_TPFLAGS_HAVE_GC) && |
| 3361 | (base->tp_flags & Py_TPFLAGS_HAVE_GC) && |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3362 | (type->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE/*GC slots exist*/) && |
| 3363 | (!type->tp_traverse && !type->tp_clear)) { |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 3364 | type->tp_flags |= Py_TPFLAGS_HAVE_GC; |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3365 | if (type->tp_traverse == NULL) |
| 3366 | type->tp_traverse = base->tp_traverse; |
| 3367 | if (type->tp_clear == NULL) |
| 3368 | type->tp_clear = base->tp_clear; |
| 3369 | } |
| 3370 | if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) { |
Guido van Rossum | f884b74 | 2001-12-17 17:14:22 +0000 | [diff] [blame] | 3371 | /* The condition below could use some explanation. |
| 3372 | It appears that tp_new is not inherited for static types |
| 3373 | whose base class is 'object'; this seems to be a precaution |
| 3374 | so that old extension types don't suddenly become |
| 3375 | callable (object.__new__ wouldn't insure the invariants |
| 3376 | that the extension type's own factory function ensures). |
| 3377 | Heap types, of course, are under our control, so they do |
| 3378 | inherit tp_new; static extension types that specify some |
| 3379 | other built-in type as the default are considered |
| 3380 | new-style-aware so they also inherit object.__new__. */ |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3381 | if (base != &PyBaseObject_Type || |
| 3382 | (type->tp_flags & Py_TPFLAGS_HEAPTYPE)) { |
| 3383 | if (type->tp_new == NULL) |
| 3384 | type->tp_new = base->tp_new; |
| 3385 | } |
| 3386 | } |
Neil Schemenauer | c806c88 | 2001-08-29 23:54:54 +0000 | [diff] [blame] | 3387 | type->tp_basicsize = newsize; |
Guido van Rossum | 4dd64ab | 2001-08-14 20:04:48 +0000 | [diff] [blame] | 3388 | |
| 3389 | /* Copy other non-function slots */ |
| 3390 | |
| 3391 | #undef COPYVAL |
| 3392 | #define COPYVAL(SLOT) \ |
| 3393 | if (type->SLOT == 0) type->SLOT = base->SLOT |
| 3394 | |
| 3395 | COPYVAL(tp_itemsize); |
| 3396 | if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_WEAKREFS) { |
| 3397 | COPYVAL(tp_weaklistoffset); |
| 3398 | } |
| 3399 | if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) { |
| 3400 | COPYVAL(tp_dictoffset); |
| 3401 | } |
Neal Norwitz | ee3a1b5 | 2007-02-25 19:44:48 +0000 | [diff] [blame] | 3402 | |
| 3403 | /* Setup fast subclass flags */ |
| 3404 | if (PyType_IsSubtype(base, (PyTypeObject*)PyExc_BaseException)) |
| 3405 | type->tp_flags |= Py_TPFLAGS_BASE_EXC_SUBCLASS; |
| 3406 | else if (PyType_IsSubtype(base, &PyType_Type)) |
| 3407 | type->tp_flags |= Py_TPFLAGS_TYPE_SUBCLASS; |
| 3408 | else if (PyType_IsSubtype(base, &PyInt_Type)) |
| 3409 | type->tp_flags |= Py_TPFLAGS_INT_SUBCLASS; |
| 3410 | else if (PyType_IsSubtype(base, &PyLong_Type)) |
| 3411 | type->tp_flags |= Py_TPFLAGS_LONG_SUBCLASS; |
| 3412 | else if (PyType_IsSubtype(base, &PyString_Type)) |
| 3413 | type->tp_flags |= Py_TPFLAGS_STRING_SUBCLASS; |
Georg Brandl | dfe5dc8 | 2008-01-07 18:16:36 +0000 | [diff] [blame] | 3414 | #ifdef Py_USING_UNICODE |
Neal Norwitz | ee3a1b5 | 2007-02-25 19:44:48 +0000 | [diff] [blame] | 3415 | else if (PyType_IsSubtype(base, &PyUnicode_Type)) |
| 3416 | type->tp_flags |= Py_TPFLAGS_UNICODE_SUBCLASS; |
Georg Brandl | dfe5dc8 | 2008-01-07 18:16:36 +0000 | [diff] [blame] | 3417 | #endif |
Neal Norwitz | ee3a1b5 | 2007-02-25 19:44:48 +0000 | [diff] [blame] | 3418 | else if (PyType_IsSubtype(base, &PyTuple_Type)) |
| 3419 | type->tp_flags |= Py_TPFLAGS_TUPLE_SUBCLASS; |
| 3420 | else if (PyType_IsSubtype(base, &PyList_Type)) |
| 3421 | type->tp_flags |= Py_TPFLAGS_LIST_SUBCLASS; |
| 3422 | else if (PyType_IsSubtype(base, &PyDict_Type)) |
| 3423 | type->tp_flags |= Py_TPFLAGS_DICT_SUBCLASS; |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3424 | } |
| 3425 | |
Guido van Rossum | 0b7b6fd | 2007-12-19 22:51:13 +0000 | [diff] [blame] | 3426 | static char *hash_name_op[] = { |
| 3427 | "__eq__", |
| 3428 | "__cmp__", |
| 3429 | "__hash__", |
| 3430 | NULL |
Guido van Rossum | 64c06e3 | 2007-11-22 00:55:51 +0000 | [diff] [blame] | 3431 | }; |
| 3432 | |
| 3433 | static int |
| 3434 | overrides_hash(PyTypeObject *type) |
| 3435 | { |
Guido van Rossum | 0b7b6fd | 2007-12-19 22:51:13 +0000 | [diff] [blame] | 3436 | char **p; |
Guido van Rossum | 64c06e3 | 2007-11-22 00:55:51 +0000 | [diff] [blame] | 3437 | PyObject *dict = type->tp_dict; |
| 3438 | |
| 3439 | assert(dict != NULL); |
Guido van Rossum | 0b7b6fd | 2007-12-19 22:51:13 +0000 | [diff] [blame] | 3440 | for (p = hash_name_op; *p; p++) { |
| 3441 | if (PyDict_GetItemString(dict, *p) != NULL) |
Guido van Rossum | 64c06e3 | 2007-11-22 00:55:51 +0000 | [diff] [blame] | 3442 | return 1; |
| 3443 | } |
| 3444 | return 0; |
| 3445 | } |
| 3446 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3447 | static void |
| 3448 | inherit_slots(PyTypeObject *type, PyTypeObject *base) |
| 3449 | { |
| 3450 | PyTypeObject *basebase; |
| 3451 | |
| 3452 | #undef SLOTDEFINED |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3453 | #undef COPYSLOT |
| 3454 | #undef COPYNUM |
| 3455 | #undef COPYSEQ |
| 3456 | #undef COPYMAP |
Guido van Rossum | 5af588b | 2001-10-12 14:13:21 +0000 | [diff] [blame] | 3457 | #undef COPYBUF |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3458 | |
| 3459 | #define SLOTDEFINED(SLOT) \ |
| 3460 | (base->SLOT != 0 && \ |
| 3461 | (basebase == NULL || base->SLOT != basebase->SLOT)) |
| 3462 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3463 | #define COPYSLOT(SLOT) \ |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3464 | if (!type->SLOT && SLOTDEFINED(SLOT)) type->SLOT = base->SLOT |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3465 | |
| 3466 | #define COPYNUM(SLOT) COPYSLOT(tp_as_number->SLOT) |
| 3467 | #define COPYSEQ(SLOT) COPYSLOT(tp_as_sequence->SLOT) |
| 3468 | #define COPYMAP(SLOT) COPYSLOT(tp_as_mapping->SLOT) |
Tim Peters | fc57ccb | 2001-10-12 02:38:24 +0000 | [diff] [blame] | 3469 | #define COPYBUF(SLOT) COPYSLOT(tp_as_buffer->SLOT) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3470 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3471 | /* This won't inherit indirect slots (from tp_as_number etc.) |
| 3472 | if type doesn't provide the space. */ |
| 3473 | |
| 3474 | if (type->tp_as_number != NULL && base->tp_as_number != NULL) { |
| 3475 | basebase = base->tp_base; |
| 3476 | if (basebase->tp_as_number == NULL) |
| 3477 | basebase = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3478 | COPYNUM(nb_add); |
| 3479 | COPYNUM(nb_subtract); |
| 3480 | COPYNUM(nb_multiply); |
| 3481 | COPYNUM(nb_divide); |
| 3482 | COPYNUM(nb_remainder); |
| 3483 | COPYNUM(nb_divmod); |
| 3484 | COPYNUM(nb_power); |
| 3485 | COPYNUM(nb_negative); |
| 3486 | COPYNUM(nb_positive); |
| 3487 | COPYNUM(nb_absolute); |
| 3488 | COPYNUM(nb_nonzero); |
| 3489 | COPYNUM(nb_invert); |
| 3490 | COPYNUM(nb_lshift); |
| 3491 | COPYNUM(nb_rshift); |
| 3492 | COPYNUM(nb_and); |
| 3493 | COPYNUM(nb_xor); |
| 3494 | COPYNUM(nb_or); |
| 3495 | COPYNUM(nb_coerce); |
| 3496 | COPYNUM(nb_int); |
| 3497 | COPYNUM(nb_long); |
| 3498 | COPYNUM(nb_float); |
| 3499 | COPYNUM(nb_oct); |
| 3500 | COPYNUM(nb_hex); |
| 3501 | COPYNUM(nb_inplace_add); |
| 3502 | COPYNUM(nb_inplace_subtract); |
| 3503 | COPYNUM(nb_inplace_multiply); |
| 3504 | COPYNUM(nb_inplace_divide); |
| 3505 | COPYNUM(nb_inplace_remainder); |
| 3506 | COPYNUM(nb_inplace_power); |
| 3507 | COPYNUM(nb_inplace_lshift); |
| 3508 | COPYNUM(nb_inplace_rshift); |
| 3509 | COPYNUM(nb_inplace_and); |
| 3510 | COPYNUM(nb_inplace_xor); |
| 3511 | COPYNUM(nb_inplace_or); |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 3512 | if (base->tp_flags & Py_TPFLAGS_CHECKTYPES) { |
| 3513 | COPYNUM(nb_true_divide); |
| 3514 | COPYNUM(nb_floor_divide); |
| 3515 | COPYNUM(nb_inplace_true_divide); |
| 3516 | COPYNUM(nb_inplace_floor_divide); |
| 3517 | } |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 3518 | if (base->tp_flags & Py_TPFLAGS_HAVE_INDEX) { |
| 3519 | COPYNUM(nb_index); |
| 3520 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3521 | } |
| 3522 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3523 | if (type->tp_as_sequence != NULL && base->tp_as_sequence != NULL) { |
| 3524 | basebase = base->tp_base; |
| 3525 | if (basebase->tp_as_sequence == NULL) |
| 3526 | basebase = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3527 | COPYSEQ(sq_length); |
| 3528 | COPYSEQ(sq_concat); |
| 3529 | COPYSEQ(sq_repeat); |
| 3530 | COPYSEQ(sq_item); |
| 3531 | COPYSEQ(sq_slice); |
| 3532 | COPYSEQ(sq_ass_item); |
| 3533 | COPYSEQ(sq_ass_slice); |
| 3534 | COPYSEQ(sq_contains); |
| 3535 | COPYSEQ(sq_inplace_concat); |
| 3536 | COPYSEQ(sq_inplace_repeat); |
| 3537 | } |
| 3538 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3539 | if (type->tp_as_mapping != NULL && base->tp_as_mapping != NULL) { |
| 3540 | basebase = base->tp_base; |
| 3541 | if (basebase->tp_as_mapping == NULL) |
| 3542 | basebase = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3543 | COPYMAP(mp_length); |
| 3544 | COPYMAP(mp_subscript); |
| 3545 | COPYMAP(mp_ass_subscript); |
| 3546 | } |
| 3547 | |
Tim Peters | fc57ccb | 2001-10-12 02:38:24 +0000 | [diff] [blame] | 3548 | if (type->tp_as_buffer != NULL && base->tp_as_buffer != NULL) { |
| 3549 | basebase = base->tp_base; |
| 3550 | if (basebase->tp_as_buffer == NULL) |
| 3551 | basebase = NULL; |
| 3552 | COPYBUF(bf_getreadbuffer); |
| 3553 | COPYBUF(bf_getwritebuffer); |
| 3554 | COPYBUF(bf_getsegcount); |
| 3555 | COPYBUF(bf_getcharbuffer); |
| 3556 | } |
| 3557 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3558 | basebase = base->tp_base; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3559 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3560 | COPYSLOT(tp_dealloc); |
| 3561 | COPYSLOT(tp_print); |
| 3562 | if (type->tp_getattr == NULL && type->tp_getattro == NULL) { |
| 3563 | type->tp_getattr = base->tp_getattr; |
| 3564 | type->tp_getattro = base->tp_getattro; |
| 3565 | } |
| 3566 | if (type->tp_setattr == NULL && type->tp_setattro == NULL) { |
| 3567 | type->tp_setattr = base->tp_setattr; |
| 3568 | type->tp_setattro = base->tp_setattro; |
| 3569 | } |
| 3570 | /* tp_compare see tp_richcompare */ |
| 3571 | COPYSLOT(tp_repr); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3572 | /* tp_hash see tp_richcompare */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3573 | COPYSLOT(tp_call); |
| 3574 | COPYSLOT(tp_str); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3575 | if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_RICHCOMPARE) { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3576 | if (type->tp_compare == NULL && |
| 3577 | type->tp_richcompare == NULL && |
Guido van Rossum | 64c06e3 | 2007-11-22 00:55:51 +0000 | [diff] [blame] | 3578 | type->tp_hash == NULL && |
| 3579 | !overrides_hash(type)) |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3580 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3581 | type->tp_compare = base->tp_compare; |
| 3582 | type->tp_richcompare = base->tp_richcompare; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 3583 | type->tp_hash = base->tp_hash; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3584 | } |
| 3585 | } |
| 3586 | else { |
| 3587 | COPYSLOT(tp_compare); |
| 3588 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3589 | if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_ITER) { |
| 3590 | COPYSLOT(tp_iter); |
| 3591 | COPYSLOT(tp_iternext); |
| 3592 | } |
| 3593 | if (type->tp_flags & base->tp_flags & Py_TPFLAGS_HAVE_CLASS) { |
| 3594 | COPYSLOT(tp_descr_get); |
| 3595 | COPYSLOT(tp_descr_set); |
| 3596 | COPYSLOT(tp_dictoffset); |
| 3597 | COPYSLOT(tp_init); |
| 3598 | COPYSLOT(tp_alloc); |
Guido van Rossum | cc8fe04 | 2002-04-05 17:10:16 +0000 | [diff] [blame] | 3599 | COPYSLOT(tp_is_gc); |
Tim Peters | 3cfe754 | 2003-05-21 21:29:48 +0000 | [diff] [blame] | 3600 | if ((type->tp_flags & Py_TPFLAGS_HAVE_GC) == |
| 3601 | (base->tp_flags & Py_TPFLAGS_HAVE_GC)) { |
| 3602 | /* They agree about gc. */ |
| 3603 | COPYSLOT(tp_free); |
| 3604 | } |
| 3605 | else if ((type->tp_flags & Py_TPFLAGS_HAVE_GC) && |
| 3606 | type->tp_free == NULL && |
| 3607 | base->tp_free == _PyObject_Del) { |
| 3608 | /* A bit of magic to plug in the correct default |
| 3609 | * tp_free function when a derived class adds gc, |
| 3610 | * didn't define tp_free, and the base uses the |
| 3611 | * default non-gc tp_free. |
| 3612 | */ |
| 3613 | type->tp_free = PyObject_GC_Del; |
| 3614 | } |
| 3615 | /* else they didn't agree about gc, and there isn't something |
| 3616 | * obvious to be done -- the type is on its own. |
| 3617 | */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3618 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3619 | } |
| 3620 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 3621 | static int add_operators(PyTypeObject *); |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3622 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3623 | int |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 3624 | PyType_Ready(PyTypeObject *type) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3625 | { |
Guido van Rossum | 2f3ca6e | 2001-10-15 21:05:10 +0000 | [diff] [blame] | 3626 | PyObject *dict, *bases; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3627 | PyTypeObject *base; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 3628 | Py_ssize_t i, n; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3629 | |
Guido van Rossum | cab0580 | 2002-06-10 15:29:03 +0000 | [diff] [blame] | 3630 | if (type->tp_flags & Py_TPFLAGS_READY) { |
| 3631 | assert(type->tp_dict != NULL); |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3632 | return 0; |
Guido van Rossum | cab0580 | 2002-06-10 15:29:03 +0000 | [diff] [blame] | 3633 | } |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3634 | assert((type->tp_flags & Py_TPFLAGS_READYING) == 0); |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3635 | |
| 3636 | type->tp_flags |= Py_TPFLAGS_READYING; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3637 | |
Tim Peters | 36eb4df | 2003-03-23 03:33:13 +0000 | [diff] [blame] | 3638 | #ifdef Py_TRACE_REFS |
| 3639 | /* PyType_Ready is the closest thing we have to a choke point |
| 3640 | * for type objects, so is the best place I can think of to try |
| 3641 | * to get type objects into the doubly-linked list of all objects. |
| 3642 | * Still, not all type objects go thru PyType_Ready. |
| 3643 | */ |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 3644 | _Py_AddToAllObjects((PyObject *)type, 0); |
Tim Peters | 36eb4df | 2003-03-23 03:33:13 +0000 | [diff] [blame] | 3645 | #endif |
| 3646 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3647 | /* Initialize tp_base (defaults to BaseObject unless that's us) */ |
| 3648 | base = type->tp_base; |
Martin v. Löwis | bf60875 | 2004-08-18 13:16:54 +0000 | [diff] [blame] | 3649 | if (base == NULL && type != &PyBaseObject_Type) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3650 | base = type->tp_base = &PyBaseObject_Type; |
Martin v. Löwis | bf60875 | 2004-08-18 13:16:54 +0000 | [diff] [blame] | 3651 | Py_INCREF(base); |
| 3652 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3653 | |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 3654 | /* Now the only way base can still be NULL is if type is |
| 3655 | * &PyBaseObject_Type. |
| 3656 | */ |
Guido van Rossum | 692cdbc | 2006-03-10 02:04:28 +0000 | [diff] [blame] | 3657 | |
Guido van Rossum | 323a9cf | 2002-08-14 17:26:30 +0000 | [diff] [blame] | 3658 | /* Initialize the base class */ |
| 3659 | if (base && base->tp_dict == NULL) { |
| 3660 | if (PyType_Ready(base) < 0) |
| 3661 | goto error; |
| 3662 | } |
| 3663 | |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 3664 | /* 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] | 3665 | compilable separately on Windows can call PyType_Ready() instead of |
| 3666 | initializing the ob_type field of their type objects. */ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 3667 | /* The test for base != NULL is really unnecessary, since base is only |
| 3668 | NULL when type is &PyBaseObject_Type, and we know its ob_type is |
| 3669 | not NULL (it's initialized to &PyType_Type). But coverity doesn't |
| 3670 | know that. */ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 3671 | if (Py_TYPE(type) == NULL && base != NULL) |
| 3672 | Py_TYPE(type) = Py_TYPE(base); |
Guido van Rossum | 0986d82 | 2002-04-08 01:38:42 +0000 | [diff] [blame] | 3673 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3674 | /* Initialize tp_bases */ |
| 3675 | bases = type->tp_bases; |
| 3676 | if (bases == NULL) { |
| 3677 | if (base == NULL) |
| 3678 | bases = PyTuple_New(0); |
| 3679 | else |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 3680 | bases = PyTuple_Pack(1, base); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3681 | if (bases == NULL) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3682 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3683 | type->tp_bases = bases; |
| 3684 | } |
| 3685 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3686 | /* Initialize tp_dict */ |
| 3687 | dict = type->tp_dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3688 | if (dict == NULL) { |
| 3689 | dict = PyDict_New(); |
| 3690 | if (dict == NULL) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3691 | goto error; |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3692 | type->tp_dict = dict; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3693 | } |
| 3694 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 3695 | /* Add type-specific descriptors to tp_dict */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3696 | if (add_operators(type) < 0) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3697 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3698 | if (type->tp_methods != NULL) { |
| 3699 | if (add_methods(type, type->tp_methods) < 0) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3700 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3701 | } |
| 3702 | if (type->tp_members != NULL) { |
| 3703 | if (add_members(type, type->tp_members) < 0) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3704 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3705 | } |
| 3706 | if (type->tp_getset != NULL) { |
| 3707 | if (add_getset(type, type->tp_getset) < 0) |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3708 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3709 | } |
| 3710 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3711 | /* Calculate method resolution order */ |
| 3712 | if (mro_internal(type) < 0) { |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3713 | goto error; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3714 | } |
| 3715 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3716 | /* Inherit special flags from dominant base */ |
| 3717 | if (type->tp_base != NULL) |
| 3718 | inherit_special(type, type->tp_base); |
| 3719 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3720 | /* Initialize tp_dict properly */ |
Guido van Rossum | 2f3ca6e | 2001-10-15 21:05:10 +0000 | [diff] [blame] | 3721 | bases = type->tp_mro; |
| 3722 | assert(bases != NULL); |
| 3723 | assert(PyTuple_Check(bases)); |
| 3724 | n = PyTuple_GET_SIZE(bases); |
| 3725 | for (i = 1; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 3726 | PyObject *b = PyTuple_GET_ITEM(bases, i); |
| 3727 | if (PyType_Check(b)) |
| 3728 | inherit_slots(type, (PyTypeObject *)b); |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 3729 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3730 | |
Tim Peters | 3cfe754 | 2003-05-21 21:29:48 +0000 | [diff] [blame] | 3731 | /* Sanity check for tp_free. */ |
| 3732 | if (PyType_IS_GC(type) && (type->tp_flags & Py_TPFLAGS_BASETYPE) && |
| 3733 | (type->tp_free == NULL || type->tp_free == PyObject_Del)) { |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 3734 | /* This base class needs to call tp_free, but doesn't have |
| 3735 | * one, or its tp_free is for non-gc'ed objects. |
| 3736 | */ |
Tim Peters | 3cfe754 | 2003-05-21 21:29:48 +0000 | [diff] [blame] | 3737 | PyErr_Format(PyExc_TypeError, "type '%.100s' participates in " |
| 3738 | "gc and is a base type but has inappropriate " |
| 3739 | "tp_free slot", |
| 3740 | type->tp_name); |
| 3741 | goto error; |
| 3742 | } |
| 3743 | |
Martin v. Löwis | f9bd6b0 | 2002-02-18 17:46:48 +0000 | [diff] [blame] | 3744 | /* if the type dictionary doesn't contain a __doc__, set it from |
| 3745 | the tp_doc slot. |
| 3746 | */ |
| 3747 | if (PyDict_GetItemString(type->tp_dict, "__doc__") == NULL) { |
| 3748 | if (type->tp_doc != NULL) { |
| 3749 | PyObject *doc = PyString_FromString(type->tp_doc); |
Neal Norwitz | e1fdb32 | 2006-07-21 05:32:28 +0000 | [diff] [blame] | 3750 | if (doc == NULL) |
| 3751 | goto error; |
Martin v. Löwis | f9bd6b0 | 2002-02-18 17:46:48 +0000 | [diff] [blame] | 3752 | PyDict_SetItemString(type->tp_dict, "__doc__", doc); |
| 3753 | Py_DECREF(doc); |
| 3754 | } else { |
Guido van Rossum | d464107 | 2002-04-03 02:13:37 +0000 | [diff] [blame] | 3755 | PyDict_SetItemString(type->tp_dict, |
| 3756 | "__doc__", Py_None); |
Martin v. Löwis | f9bd6b0 | 2002-02-18 17:46:48 +0000 | [diff] [blame] | 3757 | } |
| 3758 | } |
| 3759 | |
Guido van Rossum | 64c06e3 | 2007-11-22 00:55:51 +0000 | [diff] [blame] | 3760 | /* Hack for tp_hash and __hash__. |
| 3761 | If after all that, tp_hash is still NULL, and __hash__ is not in |
| 3762 | tp_dict, set tp_dict['__hash__'] equal to None. |
| 3763 | This signals that __hash__ is not inherited. |
| 3764 | */ |
| 3765 | if (type->tp_hash == NULL && |
| 3766 | PyDict_GetItemString(type->tp_dict, "__hash__") == NULL && |
| 3767 | PyDict_SetItemString(type->tp_dict, "__hash__", Py_None) < 0) |
| 3768 | { |
| 3769 | goto error; |
| 3770 | } |
| 3771 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3772 | /* Some more special stuff */ |
| 3773 | base = type->tp_base; |
| 3774 | if (base != NULL) { |
| 3775 | if (type->tp_as_number == NULL) |
| 3776 | type->tp_as_number = base->tp_as_number; |
| 3777 | if (type->tp_as_sequence == NULL) |
| 3778 | type->tp_as_sequence = base->tp_as_sequence; |
| 3779 | if (type->tp_as_mapping == NULL) |
| 3780 | type->tp_as_mapping = base->tp_as_mapping; |
Guido van Rossum | eea4718 | 2003-02-11 20:39:59 +0000 | [diff] [blame] | 3781 | if (type->tp_as_buffer == NULL) |
| 3782 | type->tp_as_buffer = base->tp_as_buffer; |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3783 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3784 | |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3785 | /* Link into each base class's list of subclasses */ |
| 3786 | bases = type->tp_bases; |
| 3787 | n = PyTuple_GET_SIZE(bases); |
| 3788 | for (i = 0; i < n; i++) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 3789 | PyObject *b = PyTuple_GET_ITEM(bases, i); |
| 3790 | if (PyType_Check(b) && |
| 3791 | add_subclass((PyTypeObject *)b, type) < 0) |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3792 | goto error; |
| 3793 | } |
| 3794 | |
Guido van Rossum | 13d52f0 | 2001-08-10 21:24:08 +0000 | [diff] [blame] | 3795 | /* All done -- set the ready flag */ |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3796 | assert(type->tp_dict != NULL); |
| 3797 | type->tp_flags = |
| 3798 | (type->tp_flags & ~Py_TPFLAGS_READYING) | Py_TPFLAGS_READY; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3799 | return 0; |
Guido van Rossum | d614f97 | 2001-08-10 17:39:49 +0000 | [diff] [blame] | 3800 | |
| 3801 | error: |
| 3802 | type->tp_flags &= ~Py_TPFLAGS_READYING; |
| 3803 | return -1; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3804 | } |
| 3805 | |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3806 | static int |
| 3807 | add_subclass(PyTypeObject *base, PyTypeObject *type) |
| 3808 | { |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 3809 | Py_ssize_t i; |
| 3810 | int result; |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 3811 | PyObject *list, *ref, *newobj; |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3812 | |
| 3813 | list = base->tp_subclasses; |
| 3814 | if (list == NULL) { |
| 3815 | base->tp_subclasses = list = PyList_New(0); |
| 3816 | if (list == NULL) |
| 3817 | return -1; |
| 3818 | } |
| 3819 | assert(PyList_Check(list)); |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 3820 | newobj = PyWeakref_NewRef((PyObject *)type, NULL); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3821 | i = PyList_GET_SIZE(list); |
| 3822 | while (--i >= 0) { |
| 3823 | ref = PyList_GET_ITEM(list, i); |
| 3824 | assert(PyWeakref_CheckRef(ref)); |
Guido van Rossum | 3930bc3 | 2002-10-18 13:51:49 +0000 | [diff] [blame] | 3825 | if (PyWeakref_GET_OBJECT(ref) == Py_None) |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 3826 | return PyList_SetItem(list, i, newobj); |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3827 | } |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 3828 | result = PyList_Append(list, newobj); |
| 3829 | Py_DECREF(newobj); |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 3830 | return result; |
Guido van Rossum | 1c45073 | 2001-10-08 15:18:27 +0000 | [diff] [blame] | 3831 | } |
| 3832 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 3833 | static void |
| 3834 | remove_subclass(PyTypeObject *base, PyTypeObject *type) |
| 3835 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 3836 | Py_ssize_t i; |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 3837 | PyObject *list, *ref; |
| 3838 | |
| 3839 | list = base->tp_subclasses; |
| 3840 | if (list == NULL) { |
| 3841 | return; |
| 3842 | } |
| 3843 | assert(PyList_Check(list)); |
| 3844 | i = PyList_GET_SIZE(list); |
| 3845 | while (--i >= 0) { |
| 3846 | ref = PyList_GET_ITEM(list, i); |
| 3847 | assert(PyWeakref_CheckRef(ref)); |
| 3848 | if (PyWeakref_GET_OBJECT(ref) == (PyObject*)type) { |
| 3849 | /* this can't fail, right? */ |
| 3850 | PySequence_DelItem(list, i); |
| 3851 | return; |
| 3852 | } |
| 3853 | } |
| 3854 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3855 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3856 | static int |
| 3857 | check_num_args(PyObject *ob, int n) |
| 3858 | { |
| 3859 | if (!PyTuple_CheckExact(ob)) { |
| 3860 | PyErr_SetString(PyExc_SystemError, |
| 3861 | "PyArg_UnpackTuple() argument list is not a tuple"); |
| 3862 | return 0; |
| 3863 | } |
| 3864 | if (n == PyTuple_GET_SIZE(ob)) |
| 3865 | return 1; |
| 3866 | PyErr_Format( |
| 3867 | PyExc_TypeError, |
Martin v. Löwis | 2c95cc6 | 2006-02-16 06:54:25 +0000 | [diff] [blame] | 3868 | "expected %d arguments, got %zd", n, PyTuple_GET_SIZE(ob)); |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3869 | return 0; |
| 3870 | } |
| 3871 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3872 | /* Generic wrappers for overloadable 'operators' such as __getitem__ */ |
| 3873 | |
| 3874 | /* There's a wrapper *function* for each distinct function typedef used |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 3875 | for type object slots (e.g. binaryfunc, ternaryfunc, etc.). There's a |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3876 | wrapper *table* for each distinct operation (e.g. __len__, __add__). |
| 3877 | Most tables have only one entry; the tables for binary operators have two |
| 3878 | entries, one regular and one with reversed arguments. */ |
| 3879 | |
| 3880 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 3881 | wrap_lenfunc(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3882 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 3883 | lenfunc func = (lenfunc)wrapped; |
| 3884 | Py_ssize_t res; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3885 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3886 | if (!check_num_args(args, 0)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3887 | return NULL; |
| 3888 | res = (*func)(self); |
| 3889 | if (res == -1 && PyErr_Occurred()) |
| 3890 | return NULL; |
| 3891 | return PyInt_FromLong((long)res); |
| 3892 | } |
| 3893 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3894 | static PyObject * |
Raymond Hettinger | f34f264 | 2003-10-11 17:29:04 +0000 | [diff] [blame] | 3895 | wrap_inquirypred(PyObject *self, PyObject *args, void *wrapped) |
| 3896 | { |
| 3897 | inquiry func = (inquiry)wrapped; |
| 3898 | int res; |
| 3899 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3900 | if (!check_num_args(args, 0)) |
Raymond Hettinger | f34f264 | 2003-10-11 17:29:04 +0000 | [diff] [blame] | 3901 | return NULL; |
| 3902 | res = (*func)(self); |
| 3903 | if (res == -1 && PyErr_Occurred()) |
| 3904 | return NULL; |
| 3905 | return PyBool_FromLong((long)res); |
| 3906 | } |
| 3907 | |
| 3908 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3909 | wrap_binaryfunc(PyObject *self, PyObject *args, void *wrapped) |
| 3910 | { |
| 3911 | binaryfunc func = (binaryfunc)wrapped; |
| 3912 | PyObject *other; |
| 3913 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3914 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3915 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3916 | other = PyTuple_GET_ITEM(args, 0); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3917 | return (*func)(self, other); |
| 3918 | } |
| 3919 | |
| 3920 | static PyObject * |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 3921 | wrap_binaryfunc_l(PyObject *self, PyObject *args, void *wrapped) |
| 3922 | { |
| 3923 | binaryfunc func = (binaryfunc)wrapped; |
| 3924 | PyObject *other; |
| 3925 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3926 | if (!check_num_args(args, 1)) |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 3927 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3928 | other = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 3929 | if (!(self->ob_type->tp_flags & Py_TPFLAGS_CHECKTYPES) && |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 3930 | !PyType_IsSubtype(other->ob_type, self->ob_type)) { |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 3931 | Py_INCREF(Py_NotImplemented); |
| 3932 | return Py_NotImplemented; |
| 3933 | } |
| 3934 | return (*func)(self, other); |
| 3935 | } |
| 3936 | |
| 3937 | static PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3938 | wrap_binaryfunc_r(PyObject *self, PyObject *args, void *wrapped) |
| 3939 | { |
| 3940 | binaryfunc func = (binaryfunc)wrapped; |
| 3941 | PyObject *other; |
| 3942 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3943 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3944 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3945 | other = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 3946 | if (!(self->ob_type->tp_flags & Py_TPFLAGS_CHECKTYPES) && |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 3947 | !PyType_IsSubtype(other->ob_type, self->ob_type)) { |
Guido van Rossum | 0eb2a6e | 2001-10-09 11:07:24 +0000 | [diff] [blame] | 3948 | Py_INCREF(Py_NotImplemented); |
| 3949 | return Py_NotImplemented; |
| 3950 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3951 | return (*func)(other, self); |
| 3952 | } |
| 3953 | |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 3954 | static PyObject * |
| 3955 | wrap_coercefunc(PyObject *self, PyObject *args, void *wrapped) |
| 3956 | { |
| 3957 | coercion func = (coercion)wrapped; |
| 3958 | PyObject *other, *res; |
| 3959 | int ok; |
| 3960 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3961 | if (!check_num_args(args, 1)) |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 3962 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 3963 | other = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 3964 | ok = func(&self, &other); |
| 3965 | if (ok < 0) |
| 3966 | return NULL; |
| 3967 | if (ok > 0) { |
| 3968 | Py_INCREF(Py_NotImplemented); |
| 3969 | return Py_NotImplemented; |
| 3970 | } |
| 3971 | res = PyTuple_New(2); |
| 3972 | if (res == NULL) { |
| 3973 | Py_DECREF(self); |
| 3974 | Py_DECREF(other); |
| 3975 | return NULL; |
| 3976 | } |
| 3977 | PyTuple_SET_ITEM(res, 0, self); |
| 3978 | PyTuple_SET_ITEM(res, 1, other); |
| 3979 | return res; |
| 3980 | } |
| 3981 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3982 | static PyObject * |
| 3983 | wrap_ternaryfunc(PyObject *self, PyObject *args, void *wrapped) |
| 3984 | { |
| 3985 | ternaryfunc func = (ternaryfunc)wrapped; |
| 3986 | PyObject *other; |
| 3987 | PyObject *third = Py_None; |
| 3988 | |
| 3989 | /* Note: This wrapper only works for __pow__() */ |
| 3990 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 3991 | if (!PyArg_UnpackTuple(args, "", 1, 2, &other, &third)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 3992 | return NULL; |
| 3993 | return (*func)(self, other, third); |
| 3994 | } |
| 3995 | |
Guido van Rossum | 9bea3ab | 2001-09-28 22:58:52 +0000 | [diff] [blame] | 3996 | static PyObject * |
| 3997 | wrap_ternaryfunc_r(PyObject *self, PyObject *args, void *wrapped) |
| 3998 | { |
| 3999 | ternaryfunc func = (ternaryfunc)wrapped; |
| 4000 | PyObject *other; |
| 4001 | PyObject *third = Py_None; |
| 4002 | |
| 4003 | /* Note: This wrapper only works for __pow__() */ |
| 4004 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4005 | if (!PyArg_UnpackTuple(args, "", 1, 2, &other, &third)) |
Guido van Rossum | 9bea3ab | 2001-09-28 22:58:52 +0000 | [diff] [blame] | 4006 | return NULL; |
| 4007 | return (*func)(other, self, third); |
| 4008 | } |
| 4009 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4010 | static PyObject * |
| 4011 | wrap_unaryfunc(PyObject *self, PyObject *args, void *wrapped) |
| 4012 | { |
| 4013 | unaryfunc func = (unaryfunc)wrapped; |
| 4014 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4015 | if (!check_num_args(args, 0)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4016 | return NULL; |
| 4017 | return (*func)(self); |
| 4018 | } |
| 4019 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4020 | static PyObject * |
Armin Rigo | 314861c | 2006-03-30 14:04:02 +0000 | [diff] [blame] | 4021 | wrap_indexargfunc(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4022 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4023 | ssizeargfunc func = (ssizeargfunc)wrapped; |
Armin Rigo | 314861c | 2006-03-30 14:04:02 +0000 | [diff] [blame] | 4024 | PyObject* o; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4025 | Py_ssize_t i; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4026 | |
Armin Rigo | 314861c | 2006-03-30 14:04:02 +0000 | [diff] [blame] | 4027 | if (!PyArg_UnpackTuple(args, "", 1, 1, &o)) |
| 4028 | return NULL; |
Neal Norwitz | 8a87f5d | 2006-08-12 17:03:09 +0000 | [diff] [blame] | 4029 | i = PyNumber_AsSsize_t(o, PyExc_OverflowError); |
Armin Rigo | 314861c | 2006-03-30 14:04:02 +0000 | [diff] [blame] | 4030 | if (i == -1 && PyErr_Occurred()) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4031 | return NULL; |
| 4032 | return (*func)(self, i); |
| 4033 | } |
| 4034 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4035 | static Py_ssize_t |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4036 | getindex(PyObject *self, PyObject *arg) |
| 4037 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4038 | Py_ssize_t i; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4039 | |
Neal Norwitz | 8a87f5d | 2006-08-12 17:03:09 +0000 | [diff] [blame] | 4040 | i = PyNumber_AsSsize_t(arg, PyExc_OverflowError); |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4041 | if (i == -1 && PyErr_Occurred()) |
| 4042 | return -1; |
| 4043 | if (i < 0) { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4044 | PySequenceMethods *sq = Py_TYPE(self)->tp_as_sequence; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4045 | if (sq && sq->sq_length) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4046 | Py_ssize_t n = (*sq->sq_length)(self); |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4047 | if (n < 0) |
| 4048 | return -1; |
| 4049 | i += n; |
| 4050 | } |
| 4051 | } |
| 4052 | return i; |
| 4053 | } |
| 4054 | |
| 4055 | static PyObject * |
| 4056 | wrap_sq_item(PyObject *self, PyObject *args, void *wrapped) |
| 4057 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4058 | ssizeargfunc func = (ssizeargfunc)wrapped; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4059 | PyObject *arg; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4060 | Py_ssize_t i; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4061 | |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4062 | if (PyTuple_GET_SIZE(args) == 1) { |
| 4063 | arg = PyTuple_GET_ITEM(args, 0); |
| 4064 | i = getindex(self, arg); |
| 4065 | if (i == -1 && PyErr_Occurred()) |
| 4066 | return NULL; |
| 4067 | return (*func)(self, i); |
| 4068 | } |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4069 | check_num_args(args, 1); |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4070 | assert(PyErr_Occurred()); |
| 4071 | return NULL; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4072 | } |
| 4073 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4074 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4075 | wrap_ssizessizeargfunc(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4076 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4077 | ssizessizeargfunc func = (ssizessizeargfunc)wrapped; |
| 4078 | Py_ssize_t i, j; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4079 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4080 | if (!PyArg_ParseTuple(args, "nn", &i, &j)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4081 | return NULL; |
| 4082 | return (*func)(self, i, j); |
| 4083 | } |
| 4084 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4085 | static PyObject * |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4086 | wrap_sq_setitem(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4087 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4088 | ssizeobjargproc func = (ssizeobjargproc)wrapped; |
| 4089 | Py_ssize_t i; |
| 4090 | int res; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4091 | PyObject *arg, *value; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4092 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4093 | if (!PyArg_UnpackTuple(args, "", 2, 2, &arg, &value)) |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4094 | return NULL; |
| 4095 | i = getindex(self, arg); |
| 4096 | if (i == -1 && PyErr_Occurred()) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4097 | return NULL; |
| 4098 | res = (*func)(self, i, value); |
| 4099 | if (res == -1 && PyErr_Occurred()) |
| 4100 | return NULL; |
| 4101 | Py_INCREF(Py_None); |
| 4102 | return Py_None; |
| 4103 | } |
| 4104 | |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4105 | static PyObject * |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4106 | wrap_sq_delitem(PyObject *self, PyObject *args, void *wrapped) |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4107 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4108 | ssizeobjargproc func = (ssizeobjargproc)wrapped; |
| 4109 | Py_ssize_t i; |
| 4110 | int res; |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4111 | PyObject *arg; |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4112 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4113 | if (!check_num_args(args, 1)) |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4114 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4115 | arg = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 5d815f3 | 2001-08-17 21:57:47 +0000 | [diff] [blame] | 4116 | i = getindex(self, arg); |
| 4117 | if (i == -1 && PyErr_Occurred()) |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4118 | return NULL; |
| 4119 | res = (*func)(self, i, NULL); |
| 4120 | if (res == -1 && PyErr_Occurred()) |
| 4121 | return NULL; |
| 4122 | Py_INCREF(Py_None); |
| 4123 | return Py_None; |
| 4124 | } |
| 4125 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4126 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4127 | wrap_ssizessizeobjargproc(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4128 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4129 | ssizessizeobjargproc func = (ssizessizeobjargproc)wrapped; |
| 4130 | Py_ssize_t i, j; |
| 4131 | int res; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4132 | PyObject *value; |
| 4133 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4134 | if (!PyArg_ParseTuple(args, "nnO", &i, &j, &value)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4135 | return NULL; |
| 4136 | res = (*func)(self, i, j, value); |
| 4137 | if (res == -1 && PyErr_Occurred()) |
| 4138 | return NULL; |
| 4139 | Py_INCREF(Py_None); |
| 4140 | return Py_None; |
| 4141 | } |
| 4142 | |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 4143 | static PyObject * |
| 4144 | wrap_delslice(PyObject *self, PyObject *args, void *wrapped) |
| 4145 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4146 | ssizessizeobjargproc func = (ssizessizeobjargproc)wrapped; |
| 4147 | Py_ssize_t i, j; |
| 4148 | int res; |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 4149 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4150 | if (!PyArg_ParseTuple(args, "nn", &i, &j)) |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 4151 | return NULL; |
| 4152 | res = (*func)(self, i, j, NULL); |
| 4153 | if (res == -1 && PyErr_Occurred()) |
| 4154 | return NULL; |
| 4155 | Py_INCREF(Py_None); |
| 4156 | return Py_None; |
| 4157 | } |
| 4158 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4159 | /* XXX objobjproc is a misnomer; should be objargpred */ |
| 4160 | static PyObject * |
| 4161 | wrap_objobjproc(PyObject *self, PyObject *args, void *wrapped) |
| 4162 | { |
| 4163 | objobjproc func = (objobjproc)wrapped; |
| 4164 | int res; |
Guido van Rossum | 22c3dda | 2003-10-09 03:46:35 +0000 | [diff] [blame] | 4165 | PyObject *value; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4166 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4167 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4168 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4169 | value = PyTuple_GET_ITEM(args, 0); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4170 | res = (*func)(self, value); |
| 4171 | if (res == -1 && PyErr_Occurred()) |
| 4172 | return NULL; |
Guido van Rossum | 22c3dda | 2003-10-09 03:46:35 +0000 | [diff] [blame] | 4173 | else |
| 4174 | return PyBool_FromLong(res); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4175 | } |
| 4176 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4177 | static PyObject * |
| 4178 | wrap_objobjargproc(PyObject *self, PyObject *args, void *wrapped) |
| 4179 | { |
| 4180 | objobjargproc func = (objobjargproc)wrapped; |
| 4181 | int res; |
| 4182 | PyObject *key, *value; |
| 4183 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4184 | if (!PyArg_UnpackTuple(args, "", 2, 2, &key, &value)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4185 | return NULL; |
| 4186 | res = (*func)(self, key, value); |
| 4187 | if (res == -1 && PyErr_Occurred()) |
| 4188 | return NULL; |
| 4189 | Py_INCREF(Py_None); |
| 4190 | return Py_None; |
| 4191 | } |
| 4192 | |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4193 | static PyObject * |
| 4194 | wrap_delitem(PyObject *self, PyObject *args, void *wrapped) |
| 4195 | { |
| 4196 | objobjargproc func = (objobjargproc)wrapped; |
| 4197 | int res; |
| 4198 | PyObject *key; |
| 4199 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4200 | if (!check_num_args(args, 1)) |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4201 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4202 | key = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 2b8d7bd | 2001-08-02 15:31:58 +0000 | [diff] [blame] | 4203 | res = (*func)(self, key, NULL); |
| 4204 | if (res == -1 && PyErr_Occurred()) |
| 4205 | return NULL; |
| 4206 | Py_INCREF(Py_None); |
| 4207 | return Py_None; |
| 4208 | } |
| 4209 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4210 | static PyObject * |
| 4211 | wrap_cmpfunc(PyObject *self, PyObject *args, void *wrapped) |
| 4212 | { |
| 4213 | cmpfunc func = (cmpfunc)wrapped; |
| 4214 | int res; |
| 4215 | PyObject *other; |
| 4216 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4217 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4218 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4219 | other = PyTuple_GET_ITEM(args, 0); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4220 | if (Py_TYPE(other)->tp_compare != func && |
| 4221 | !PyType_IsSubtype(Py_TYPE(other), Py_TYPE(self))) { |
Guido van Rossum | ceccae5 | 2001-09-18 20:03:57 +0000 | [diff] [blame] | 4222 | PyErr_Format( |
| 4223 | PyExc_TypeError, |
| 4224 | "%s.__cmp__(x,y) requires y to be a '%s', not a '%s'", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4225 | Py_TYPE(self)->tp_name, |
| 4226 | Py_TYPE(self)->tp_name, |
| 4227 | Py_TYPE(other)->tp_name); |
Guido van Rossum | ceccae5 | 2001-09-18 20:03:57 +0000 | [diff] [blame] | 4228 | return NULL; |
| 4229 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4230 | res = (*func)(self, other); |
| 4231 | if (PyErr_Occurred()) |
| 4232 | return NULL; |
| 4233 | return PyInt_FromLong((long)res); |
| 4234 | } |
| 4235 | |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4236 | /* 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] | 4237 | This is called the Carlo Verre hack after its discoverer. */ |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4238 | static int |
| 4239 | hackcheck(PyObject *self, setattrofunc func, char *what) |
| 4240 | { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4241 | PyTypeObject *type = Py_TYPE(self); |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4242 | while (type && type->tp_flags & Py_TPFLAGS_HEAPTYPE) |
| 4243 | type = type->tp_base; |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 4244 | /* If type is NULL now, this is a really weird type. |
| 4245 | In the spirit of backwards compatibility (?), just shut up. */ |
Guido van Rossum | 692cdbc | 2006-03-10 02:04:28 +0000 | [diff] [blame] | 4246 | if (type && type->tp_setattro != func) { |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4247 | PyErr_Format(PyExc_TypeError, |
| 4248 | "can't apply this %s to %s object", |
| 4249 | what, |
| 4250 | type->tp_name); |
| 4251 | return 0; |
| 4252 | } |
| 4253 | return 1; |
| 4254 | } |
| 4255 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4256 | static PyObject * |
| 4257 | wrap_setattr(PyObject *self, PyObject *args, void *wrapped) |
| 4258 | { |
| 4259 | setattrofunc func = (setattrofunc)wrapped; |
| 4260 | int res; |
| 4261 | PyObject *name, *value; |
| 4262 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4263 | if (!PyArg_UnpackTuple(args, "", 2, 2, &name, &value)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4264 | return NULL; |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4265 | if (!hackcheck(self, func, "__setattr__")) |
| 4266 | return NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4267 | res = (*func)(self, name, value); |
| 4268 | if (res < 0) |
| 4269 | return NULL; |
| 4270 | Py_INCREF(Py_None); |
| 4271 | return Py_None; |
| 4272 | } |
| 4273 | |
| 4274 | static PyObject * |
| 4275 | wrap_delattr(PyObject *self, PyObject *args, void *wrapped) |
| 4276 | { |
| 4277 | setattrofunc func = (setattrofunc)wrapped; |
| 4278 | int res; |
| 4279 | PyObject *name; |
| 4280 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4281 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4282 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4283 | name = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 4dcdb78 | 2003-04-14 21:46:03 +0000 | [diff] [blame] | 4284 | if (!hackcheck(self, func, "__delattr__")) |
| 4285 | return NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4286 | res = (*func)(self, name, NULL); |
| 4287 | if (res < 0) |
| 4288 | return NULL; |
| 4289 | Py_INCREF(Py_None); |
| 4290 | return Py_None; |
| 4291 | } |
| 4292 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4293 | static PyObject * |
| 4294 | wrap_hashfunc(PyObject *self, PyObject *args, void *wrapped) |
| 4295 | { |
| 4296 | hashfunc func = (hashfunc)wrapped; |
| 4297 | long res; |
| 4298 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4299 | if (!check_num_args(args, 0)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4300 | return NULL; |
| 4301 | res = (*func)(self); |
| 4302 | if (res == -1 && PyErr_Occurred()) |
| 4303 | return NULL; |
| 4304 | return PyInt_FromLong(res); |
| 4305 | } |
| 4306 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4307 | static PyObject * |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 4308 | wrap_call(PyObject *self, PyObject *args, void *wrapped, PyObject *kwds) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4309 | { |
| 4310 | ternaryfunc func = (ternaryfunc)wrapped; |
| 4311 | |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 4312 | return (*func)(self, args, kwds); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4313 | } |
| 4314 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4315 | static PyObject * |
| 4316 | wrap_richcmpfunc(PyObject *self, PyObject *args, void *wrapped, int op) |
| 4317 | { |
| 4318 | richcmpfunc func = (richcmpfunc)wrapped; |
| 4319 | PyObject *other; |
| 4320 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4321 | if (!check_num_args(args, 1)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4322 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4323 | other = PyTuple_GET_ITEM(args, 0); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4324 | return (*func)(self, other, op); |
| 4325 | } |
| 4326 | |
| 4327 | #undef RICHCMP_WRAPPER |
| 4328 | #define RICHCMP_WRAPPER(NAME, OP) \ |
| 4329 | static PyObject * \ |
| 4330 | richcmp_##NAME(PyObject *self, PyObject *args, void *wrapped) \ |
| 4331 | { \ |
| 4332 | return wrap_richcmpfunc(self, args, wrapped, OP); \ |
| 4333 | } |
| 4334 | |
Jack Jansen | 8e938b4 | 2001-08-08 15:29:49 +0000 | [diff] [blame] | 4335 | RICHCMP_WRAPPER(lt, Py_LT) |
| 4336 | RICHCMP_WRAPPER(le, Py_LE) |
| 4337 | RICHCMP_WRAPPER(eq, Py_EQ) |
| 4338 | RICHCMP_WRAPPER(ne, Py_NE) |
| 4339 | RICHCMP_WRAPPER(gt, Py_GT) |
| 4340 | RICHCMP_WRAPPER(ge, Py_GE) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4341 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4342 | static PyObject * |
| 4343 | wrap_next(PyObject *self, PyObject *args, void *wrapped) |
| 4344 | { |
| 4345 | unaryfunc func = (unaryfunc)wrapped; |
| 4346 | PyObject *res; |
| 4347 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4348 | if (!check_num_args(args, 0)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4349 | return NULL; |
| 4350 | res = (*func)(self); |
| 4351 | if (res == NULL && !PyErr_Occurred()) |
| 4352 | PyErr_SetNone(PyExc_StopIteration); |
| 4353 | return res; |
| 4354 | } |
| 4355 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4356 | static PyObject * |
| 4357 | wrap_descr_get(PyObject *self, PyObject *args, void *wrapped) |
| 4358 | { |
| 4359 | descrgetfunc func = (descrgetfunc)wrapped; |
| 4360 | PyObject *obj; |
| 4361 | PyObject *type = NULL; |
| 4362 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4363 | if (!PyArg_UnpackTuple(args, "", 1, 2, &obj, &type)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4364 | return NULL; |
Guido van Rossum | 82ed25c | 2003-02-11 16:25:43 +0000 | [diff] [blame] | 4365 | if (obj == Py_None) |
| 4366 | obj = NULL; |
| 4367 | if (type == Py_None) |
| 4368 | type = NULL; |
| 4369 | if (type == NULL &&obj == NULL) { |
| 4370 | PyErr_SetString(PyExc_TypeError, |
| 4371 | "__get__(None, None) is invalid"); |
| 4372 | return NULL; |
| 4373 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4374 | return (*func)(self, obj, type); |
| 4375 | } |
| 4376 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4377 | static PyObject * |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 4378 | wrap_descr_set(PyObject *self, PyObject *args, void *wrapped) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4379 | { |
| 4380 | descrsetfunc func = (descrsetfunc)wrapped; |
| 4381 | PyObject *obj, *value; |
| 4382 | int ret; |
| 4383 | |
Raymond Hettinger | 56bb16f | 2003-10-11 19:32:18 +0000 | [diff] [blame] | 4384 | if (!PyArg_UnpackTuple(args, "", 2, 2, &obj, &value)) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4385 | return NULL; |
| 4386 | ret = (*func)(self, obj, value); |
| 4387 | if (ret < 0) |
| 4388 | return NULL; |
| 4389 | Py_INCREF(Py_None); |
| 4390 | return Py_None; |
| 4391 | } |
Guido van Rossum | 22b1387 | 2002-08-06 21:41:44 +0000 | [diff] [blame] | 4392 | |
Guido van Rossum | 0dbab4c5 | 2002-08-01 14:39:25 +0000 | [diff] [blame] | 4393 | static PyObject * |
| 4394 | wrap_descr_delete(PyObject *self, PyObject *args, void *wrapped) |
| 4395 | { |
| 4396 | descrsetfunc func = (descrsetfunc)wrapped; |
| 4397 | PyObject *obj; |
| 4398 | int ret; |
| 4399 | |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4400 | if (!check_num_args(args, 1)) |
Guido van Rossum | 0dbab4c5 | 2002-08-01 14:39:25 +0000 | [diff] [blame] | 4401 | return NULL; |
Raymond Hettinger | 6a8bbdb | 2003-12-13 15:21:55 +0000 | [diff] [blame] | 4402 | obj = PyTuple_GET_ITEM(args, 0); |
Guido van Rossum | 0dbab4c5 | 2002-08-01 14:39:25 +0000 | [diff] [blame] | 4403 | ret = (*func)(self, obj, NULL); |
| 4404 | if (ret < 0) |
| 4405 | return NULL; |
| 4406 | Py_INCREF(Py_None); |
| 4407 | return Py_None; |
| 4408 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4409 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4410 | static PyObject * |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 4411 | wrap_init(PyObject *self, PyObject *args, void *wrapped, PyObject *kwds) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4412 | { |
| 4413 | initproc func = (initproc)wrapped; |
| 4414 | |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 4415 | if (func(self, args, kwds) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4416 | return NULL; |
| 4417 | Py_INCREF(Py_None); |
| 4418 | return Py_None; |
| 4419 | } |
| 4420 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4421 | static PyObject * |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4422 | tp_new_wrapper(PyObject *self, PyObject *args, PyObject *kwds) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4423 | { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4424 | PyTypeObject *type, *subtype, *staticbase; |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4425 | PyObject *arg0, *res; |
| 4426 | |
| 4427 | if (self == NULL || !PyType_Check(self)) |
| 4428 | Py_FatalError("__new__() called with non-type 'self'"); |
| 4429 | type = (PyTypeObject *)self; |
| 4430 | if (!PyTuple_Check(args) || PyTuple_GET_SIZE(args) < 1) { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4431 | PyErr_Format(PyExc_TypeError, |
| 4432 | "%s.__new__(): not enough arguments", |
| 4433 | type->tp_name); |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4434 | return NULL; |
| 4435 | } |
| 4436 | arg0 = PyTuple_GET_ITEM(args, 0); |
| 4437 | if (!PyType_Check(arg0)) { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4438 | PyErr_Format(PyExc_TypeError, |
| 4439 | "%s.__new__(X): X is not a type object (%s)", |
| 4440 | type->tp_name, |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4441 | Py_TYPE(arg0)->tp_name); |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4442 | return NULL; |
| 4443 | } |
| 4444 | subtype = (PyTypeObject *)arg0; |
| 4445 | if (!PyType_IsSubtype(subtype, type)) { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4446 | PyErr_Format(PyExc_TypeError, |
| 4447 | "%s.__new__(%s): %s is not a subtype of %s", |
| 4448 | type->tp_name, |
| 4449 | subtype->tp_name, |
| 4450 | subtype->tp_name, |
| 4451 | type->tp_name); |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4452 | return NULL; |
| 4453 | } |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4454 | |
| 4455 | /* Check that the use doesn't do something silly and unsafe like |
Tim Peters | a427a2b | 2001-10-29 22:25:45 +0000 | [diff] [blame] | 4456 | object.__new__(dict). To do this, we check that the |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4457 | most derived base that's not a heap type is this type. */ |
| 4458 | staticbase = subtype; |
| 4459 | while (staticbase && (staticbase->tp_flags & Py_TPFLAGS_HEAPTYPE)) |
| 4460 | staticbase = staticbase->tp_base; |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 4461 | /* If staticbase is NULL now, it is a really weird type. |
| 4462 | In the spirit of backwards compatibility (?), just shut up. */ |
Guido van Rossum | 692cdbc | 2006-03-10 02:04:28 +0000 | [diff] [blame] | 4463 | if (staticbase && staticbase->tp_new != type->tp_new) { |
Barry Warsaw | 60f0188 | 2001-08-22 19:24:42 +0000 | [diff] [blame] | 4464 | PyErr_Format(PyExc_TypeError, |
| 4465 | "%s.__new__(%s) is not safe, use %s.__new__()", |
| 4466 | type->tp_name, |
| 4467 | subtype->tp_name, |
| 4468 | staticbase == NULL ? "?" : staticbase->tp_name); |
| 4469 | return NULL; |
| 4470 | } |
| 4471 | |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4472 | args = PyTuple_GetSlice(args, 1, PyTuple_GET_SIZE(args)); |
| 4473 | if (args == NULL) |
| 4474 | return NULL; |
| 4475 | res = type->tp_new(subtype, args, kwds); |
| 4476 | Py_DECREF(args); |
| 4477 | return res; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4478 | } |
| 4479 | |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4480 | static struct PyMethodDef tp_new_methoddef[] = { |
Neal Norwitz | a84dcd7 | 2007-05-22 07:16:44 +0000 | [diff] [blame] | 4481 | {"__new__", (PyCFunction)tp_new_wrapper, METH_VARARGS|METH_KEYWORDS, |
Neal Norwitz | 5dc2a37 | 2002-08-13 22:19:13 +0000 | [diff] [blame] | 4482 | PyDoc_STR("T.__new__(S, ...) -> " |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 4483 | "a new object with type S, a subtype of T")}, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4484 | {0} |
| 4485 | }; |
| 4486 | |
| 4487 | static int |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4488 | add_tp_new_wrapper(PyTypeObject *type) |
| 4489 | { |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 4490 | PyObject *func; |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4491 | |
Guido van Rossum | 687ae00 | 2001-10-15 22:03:32 +0000 | [diff] [blame] | 4492 | if (PyDict_GetItemString(type->tp_dict, "__new__") != NULL) |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 4493 | return 0; |
| 4494 | func = PyCFunction_New(tp_new_methoddef, (PyObject *)type); |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4495 | if (func == NULL) |
| 4496 | return -1; |
Raymond Hettinger | 8d726ee | 2004-06-25 22:24:35 +0000 | [diff] [blame] | 4497 | if (PyDict_SetItemString(type->tp_dict, "__new__", func)) { |
Raymond Hettinger | d56cbe5 | 2004-06-25 22:17:39 +0000 | [diff] [blame] | 4498 | Py_DECREF(func); |
| 4499 | return -1; |
| 4500 | } |
| 4501 | Py_DECREF(func); |
| 4502 | return 0; |
Guido van Rossum | 0d231ed | 2001-08-06 16:50:37 +0000 | [diff] [blame] | 4503 | } |
| 4504 | |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 4505 | /* Slot wrappers that call the corresponding __foo__ slot. See comments |
| 4506 | below at override_slots() for more explanation. */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4507 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4508 | #define SLOT0(FUNCNAME, OPSTR) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4509 | static PyObject * \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4510 | FUNCNAME(PyObject *self) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4511 | { \ |
Guido van Rossum | 5592e4d | 2001-08-28 18:28:21 +0000 | [diff] [blame] | 4512 | static PyObject *cache_str; \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4513 | return call_method(self, OPSTR, &cache_str, "()"); \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4514 | } |
| 4515 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4516 | #define SLOT1(FUNCNAME, OPSTR, ARG1TYPE, ARGCODES) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4517 | static PyObject * \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4518 | FUNCNAME(PyObject *self, ARG1TYPE arg1) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4519 | { \ |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4520 | static PyObject *cache_str; \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4521 | return call_method(self, OPSTR, &cache_str, "(" ARGCODES ")", arg1); \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4522 | } |
| 4523 | |
Guido van Rossum | cd11880 | 2003-01-06 22:57:47 +0000 | [diff] [blame] | 4524 | /* Boolean helper for SLOT1BINFULL(). |
| 4525 | right.__class__ is a nontrivial subclass of left.__class__. */ |
| 4526 | static int |
| 4527 | method_is_overloaded(PyObject *left, PyObject *right, char *name) |
| 4528 | { |
| 4529 | PyObject *a, *b; |
| 4530 | int ok; |
| 4531 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4532 | b = PyObject_GetAttrString((PyObject *)(Py_TYPE(right)), name); |
Guido van Rossum | cd11880 | 2003-01-06 22:57:47 +0000 | [diff] [blame] | 4533 | if (b == NULL) { |
| 4534 | PyErr_Clear(); |
| 4535 | /* If right doesn't have it, it's not overloaded */ |
| 4536 | return 0; |
| 4537 | } |
| 4538 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4539 | a = PyObject_GetAttrString((PyObject *)(Py_TYPE(left)), name); |
Guido van Rossum | cd11880 | 2003-01-06 22:57:47 +0000 | [diff] [blame] | 4540 | if (a == NULL) { |
| 4541 | PyErr_Clear(); |
| 4542 | Py_DECREF(b); |
| 4543 | /* If right has it but left doesn't, it's overloaded */ |
| 4544 | return 1; |
| 4545 | } |
| 4546 | |
| 4547 | ok = PyObject_RichCompareBool(a, b, Py_NE); |
| 4548 | Py_DECREF(a); |
| 4549 | Py_DECREF(b); |
| 4550 | if (ok < 0) { |
| 4551 | PyErr_Clear(); |
| 4552 | return 0; |
| 4553 | } |
| 4554 | |
| 4555 | return ok; |
| 4556 | } |
| 4557 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4558 | |
| 4559 | #define SLOT1BINFULL(FUNCNAME, TESTFUNC, SLOTNAME, OPSTR, ROPSTR) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4560 | static PyObject * \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4561 | FUNCNAME(PyObject *self, PyObject *other) \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4562 | { \ |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4563 | static PyObject *cache_str, *rcache_str; \ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4564 | int do_other = Py_TYPE(self) != Py_TYPE(other) && \ |
| 4565 | Py_TYPE(other)->tp_as_number != NULL && \ |
| 4566 | Py_TYPE(other)->tp_as_number->SLOTNAME == TESTFUNC; \ |
| 4567 | if (Py_TYPE(self)->tp_as_number != NULL && \ |
| 4568 | Py_TYPE(self)->tp_as_number->SLOTNAME == TESTFUNC) { \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4569 | PyObject *r; \ |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4570 | if (do_other && \ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4571 | PyType_IsSubtype(Py_TYPE(other), Py_TYPE(self)) && \ |
Guido van Rossum | cd11880 | 2003-01-06 22:57:47 +0000 | [diff] [blame] | 4572 | method_is_overloaded(self, other, ROPSTR)) { \ |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4573 | r = call_maybe( \ |
| 4574 | other, ROPSTR, &rcache_str, "(O)", self); \ |
| 4575 | if (r != Py_NotImplemented) \ |
| 4576 | return r; \ |
| 4577 | Py_DECREF(r); \ |
| 4578 | do_other = 0; \ |
| 4579 | } \ |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 4580 | r = call_maybe( \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4581 | self, OPSTR, &cache_str, "(O)", other); \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4582 | if (r != Py_NotImplemented || \ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4583 | Py_TYPE(other) == Py_TYPE(self)) \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4584 | return r; \ |
| 4585 | Py_DECREF(r); \ |
| 4586 | } \ |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4587 | if (do_other) { \ |
Guido van Rossum | f21c6be | 2001-09-14 17:51:50 +0000 | [diff] [blame] | 4588 | return call_maybe( \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4589 | other, ROPSTR, &rcache_str, "(O)", self); \ |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4590 | } \ |
| 4591 | Py_INCREF(Py_NotImplemented); \ |
| 4592 | return Py_NotImplemented; \ |
| 4593 | } |
| 4594 | |
| 4595 | #define SLOT1BIN(FUNCNAME, SLOTNAME, OPSTR, ROPSTR) \ |
| 4596 | SLOT1BINFULL(FUNCNAME, FUNCNAME, SLOTNAME, OPSTR, ROPSTR) |
| 4597 | |
| 4598 | #define SLOT2(FUNCNAME, OPSTR, ARG1TYPE, ARG2TYPE, ARGCODES) \ |
| 4599 | static PyObject * \ |
| 4600 | FUNCNAME(PyObject *self, ARG1TYPE arg1, ARG2TYPE arg2) \ |
| 4601 | { \ |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4602 | static PyObject *cache_str; \ |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4603 | return call_method(self, OPSTR, &cache_str, \ |
| 4604 | "(" ARGCODES ")", arg1, arg2); \ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4605 | } |
| 4606 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4607 | static Py_ssize_t |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4608 | slot_sq_length(PyObject *self) |
| 4609 | { |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4610 | static PyObject *len_str; |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4611 | PyObject *res = call_method(self, "__len__", &len_str, "()"); |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4612 | Py_ssize_t len; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4613 | |
| 4614 | if (res == NULL) |
| 4615 | return -1; |
Neal Norwitz | 1872b1c | 2006-08-12 18:44:06 +0000 | [diff] [blame] | 4616 | len = PyInt_AsSsize_t(res); |
Guido van Rossum | 2611162 | 2001-10-01 16:42:49 +0000 | [diff] [blame] | 4617 | Py_DECREF(res); |
Jeremy Hylton | f20fcf9 | 2002-07-25 16:06:15 +0000 | [diff] [blame] | 4618 | if (len < 0) { |
Armin Rigo | 7ccbca9 | 2006-10-04 12:17:45 +0000 | [diff] [blame] | 4619 | if (!PyErr_Occurred()) |
| 4620 | PyErr_SetString(PyExc_ValueError, |
| 4621 | "__len__() should return >= 0"); |
Jeremy Hylton | f20fcf9 | 2002-07-25 16:06:15 +0000 | [diff] [blame] | 4622 | return -1; |
| 4623 | } |
Guido van Rossum | 2611162 | 2001-10-01 16:42:49 +0000 | [diff] [blame] | 4624 | return len; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4625 | } |
| 4626 | |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4627 | /* Super-optimized version of slot_sq_item. |
| 4628 | Other slots could do the same... */ |
| 4629 | static PyObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4630 | slot_sq_item(PyObject *self, Py_ssize_t i) |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4631 | { |
| 4632 | static PyObject *getitem_str; |
| 4633 | PyObject *func, *args = NULL, *ival = NULL, *retval = NULL; |
| 4634 | descrgetfunc f; |
| 4635 | |
| 4636 | if (getitem_str == NULL) { |
| 4637 | getitem_str = PyString_InternFromString("__getitem__"); |
| 4638 | if (getitem_str == NULL) |
| 4639 | return NULL; |
| 4640 | } |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4641 | func = _PyType_Lookup(Py_TYPE(self), getitem_str); |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4642 | if (func != NULL) { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4643 | if ((f = Py_TYPE(func)->tp_descr_get) == NULL) |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4644 | Py_INCREF(func); |
Neal Norwitz | 673cd82 | 2002-10-18 16:33:13 +0000 | [diff] [blame] | 4645 | else { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4646 | func = f(func, self, (PyObject *)(Py_TYPE(self))); |
Neal Norwitz | 673cd82 | 2002-10-18 16:33:13 +0000 | [diff] [blame] | 4647 | if (func == NULL) { |
| 4648 | return NULL; |
| 4649 | } |
| 4650 | } |
Martin v. Löwis | eb079f1 | 2006-02-16 14:32:27 +0000 | [diff] [blame] | 4651 | ival = PyInt_FromSsize_t(i); |
Guido van Rossum | f4593e0 | 2001-10-03 12:09:30 +0000 | [diff] [blame] | 4652 | if (ival != NULL) { |
| 4653 | args = PyTuple_New(1); |
| 4654 | if (args != NULL) { |
| 4655 | PyTuple_SET_ITEM(args, 0, ival); |
| 4656 | retval = PyObject_Call(func, args, NULL); |
| 4657 | Py_XDECREF(args); |
| 4658 | Py_XDECREF(func); |
| 4659 | return retval; |
| 4660 | } |
| 4661 | } |
| 4662 | } |
| 4663 | else { |
| 4664 | PyErr_SetObject(PyExc_AttributeError, getitem_str); |
| 4665 | } |
| 4666 | Py_XDECREF(args); |
| 4667 | Py_XDECREF(ival); |
| 4668 | Py_XDECREF(func); |
| 4669 | return NULL; |
| 4670 | } |
| 4671 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4672 | SLOT2(slot_sq_slice, "__getslice__", Py_ssize_t, Py_ssize_t, "nn") |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4673 | |
| 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 | 4e90810 | 2006-04-21 11:26:56 +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 | 4e90810 | 2006-04-21 11:26:56 +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 |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4693 | slot_sq_ass_slice(PyObject *self, Py_ssize_t i, Py_ssize_t j, PyObject *value) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4694 | { |
| 4695 | PyObject *res; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4696 | static PyObject *delslice_str, *setslice_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4697 | |
| 4698 | if (value == NULL) |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4699 | res = call_method(self, "__delslice__", &delslice_str, |
Thomas Wouters | 4e90810 | 2006-04-21 11:26:56 +0000 | [diff] [blame] | 4700 | "(nn)", i, j); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4701 | else |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4702 | res = call_method(self, "__setslice__", &setslice_str, |
Thomas Wouters | 4e90810 | 2006-04-21 11:26:56 +0000 | [diff] [blame] | 4703 | "(nnO)", i, j, value); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4704 | if (res == NULL) |
| 4705 | return -1; |
| 4706 | Py_DECREF(res); |
| 4707 | return 0; |
| 4708 | } |
| 4709 | |
| 4710 | static int |
| 4711 | slot_sq_contains(PyObject *self, PyObject *value) |
| 4712 | { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4713 | PyObject *func, *res, *args; |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4714 | int result = -1; |
| 4715 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4716 | static PyObject *contains_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4717 | |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4718 | func = lookup_maybe(self, "__contains__", &contains_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4719 | if (func != NULL) { |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 4720 | args = PyTuple_Pack(1, value); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4721 | if (args == NULL) |
| 4722 | res = NULL; |
| 4723 | else { |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4724 | res = PyObject_Call(func, args, NULL); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4725 | Py_DECREF(args); |
| 4726 | } |
| 4727 | Py_DECREF(func); |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4728 | if (res != NULL) { |
| 4729 | result = PyObject_IsTrue(res); |
| 4730 | Py_DECREF(res); |
| 4731 | } |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4732 | } |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4733 | else if (! PyErr_Occurred()) { |
Martin v. Löwis | 725507b | 2006-03-07 12:08:51 +0000 | [diff] [blame] | 4734 | /* Possible results: -1 and 1 */ |
| 4735 | result = (int)_PySequence_IterSearch(self, value, |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4736 | PY_ITERSEARCH_CONTAINS); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4737 | } |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 4738 | return result; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4739 | } |
| 4740 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4741 | #define slot_mp_length slot_sq_length |
| 4742 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4743 | SLOT1(slot_mp_subscript, "__getitem__", PyObject *, "O") |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4744 | |
| 4745 | static int |
| 4746 | slot_mp_ass_subscript(PyObject *self, PyObject *key, PyObject *value) |
| 4747 | { |
| 4748 | PyObject *res; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4749 | static PyObject *delitem_str, *setitem_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4750 | |
| 4751 | if (value == NULL) |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4752 | res = call_method(self, "__delitem__", &delitem_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4753 | "(O)", key); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4754 | else |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4755 | res = call_method(self, "__setitem__", &setitem_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4756 | "(OO)", key, value); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4757 | if (res == NULL) |
| 4758 | return -1; |
| 4759 | Py_DECREF(res); |
| 4760 | return 0; |
| 4761 | } |
| 4762 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4763 | SLOT1BIN(slot_nb_add, nb_add, "__add__", "__radd__") |
| 4764 | SLOT1BIN(slot_nb_subtract, nb_subtract, "__sub__", "__rsub__") |
| 4765 | SLOT1BIN(slot_nb_multiply, nb_multiply, "__mul__", "__rmul__") |
| 4766 | SLOT1BIN(slot_nb_divide, nb_divide, "__div__", "__rdiv__") |
| 4767 | SLOT1BIN(slot_nb_remainder, nb_remainder, "__mod__", "__rmod__") |
| 4768 | SLOT1BIN(slot_nb_divmod, nb_divmod, "__divmod__", "__rdivmod__") |
| 4769 | |
Jeremy Hylton | 938ace6 | 2002-07-17 16:30:39 +0000 | [diff] [blame] | 4770 | static PyObject *slot_nb_power(PyObject *, PyObject *, PyObject *); |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4771 | |
| 4772 | SLOT1BINFULL(slot_nb_power_binary, slot_nb_power, |
| 4773 | nb_power, "__pow__", "__rpow__") |
| 4774 | |
| 4775 | static PyObject * |
| 4776 | slot_nb_power(PyObject *self, PyObject *other, PyObject *modulus) |
| 4777 | { |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 4778 | static PyObject *pow_str; |
| 4779 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4780 | if (modulus == Py_None) |
| 4781 | return slot_nb_power_binary(self, other); |
Guido van Rossum | 2309498 | 2002-06-10 14:30:43 +0000 | [diff] [blame] | 4782 | /* Three-arg power doesn't use __rpow__. But ternary_op |
| 4783 | can call this when the second argument's type uses |
| 4784 | slot_nb_power, so check before calling self.__pow__. */ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4785 | if (Py_TYPE(self)->tp_as_number != NULL && |
| 4786 | Py_TYPE(self)->tp_as_number->nb_power == slot_nb_power) { |
Guido van Rossum | 2309498 | 2002-06-10 14:30:43 +0000 | [diff] [blame] | 4787 | return call_method(self, "__pow__", &pow_str, |
| 4788 | "(OO)", other, modulus); |
| 4789 | } |
| 4790 | Py_INCREF(Py_NotImplemented); |
| 4791 | return Py_NotImplemented; |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4792 | } |
| 4793 | |
| 4794 | SLOT0(slot_nb_negative, "__neg__") |
| 4795 | SLOT0(slot_nb_positive, "__pos__") |
| 4796 | SLOT0(slot_nb_absolute, "__abs__") |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4797 | |
| 4798 | static int |
| 4799 | slot_nb_nonzero(PyObject *self) |
| 4800 | { |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4801 | PyObject *func, *args; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4802 | static PyObject *nonzero_str, *len_str; |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4803 | int result = -1; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4804 | |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4805 | func = lookup_maybe(self, "__nonzero__", &nonzero_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4806 | if (func == NULL) { |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4807 | if (PyErr_Occurred()) |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4808 | return -1; |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4809 | func = lookup_maybe(self, "__len__", &len_str); |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4810 | if (func == NULL) |
| 4811 | return PyErr_Occurred() ? -1 : 1; |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 4812 | } |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4813 | args = PyTuple_New(0); |
| 4814 | if (args != NULL) { |
| 4815 | PyObject *temp = PyObject_Call(func, args, NULL); |
| 4816 | Py_DECREF(args); |
| 4817 | if (temp != NULL) { |
Jeremy Hylton | 3e3159c | 2003-06-27 17:38:27 +0000 | [diff] [blame] | 4818 | if (PyInt_CheckExact(temp) || PyBool_Check(temp)) |
Jeremy Hylton | 090a349 | 2003-06-27 16:46:45 +0000 | [diff] [blame] | 4819 | result = PyObject_IsTrue(temp); |
| 4820 | else { |
| 4821 | PyErr_Format(PyExc_TypeError, |
| 4822 | "__nonzero__ should return " |
| 4823 | "bool or int, returned %s", |
| 4824 | temp->ob_type->tp_name); |
Jeremy Hylton | 3e3159c | 2003-06-27 17:38:27 +0000 | [diff] [blame] | 4825 | result = -1; |
Jeremy Hylton | 090a349 | 2003-06-27 16:46:45 +0000 | [diff] [blame] | 4826 | } |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4827 | Py_DECREF(temp); |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4828 | } |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4829 | } |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4830 | Py_DECREF(func); |
Tim Peters | ea7f75d | 2002-12-07 21:39:16 +0000 | [diff] [blame] | 4831 | return result; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4832 | } |
| 4833 | |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 4834 | |
Neal Norwitz | 8a87f5d | 2006-08-12 17:03:09 +0000 | [diff] [blame] | 4835 | static PyObject * |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 4836 | slot_nb_index(PyObject *self) |
| 4837 | { |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 4838 | static PyObject *index_str; |
Neal Norwitz | 8a87f5d | 2006-08-12 17:03:09 +0000 | [diff] [blame] | 4839 | return call_method(self, "__index__", &index_str, "()"); |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 4840 | } |
| 4841 | |
| 4842 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4843 | SLOT0(slot_nb_invert, "__invert__") |
| 4844 | SLOT1BIN(slot_nb_lshift, nb_lshift, "__lshift__", "__rlshift__") |
| 4845 | SLOT1BIN(slot_nb_rshift, nb_rshift, "__rshift__", "__rrshift__") |
| 4846 | SLOT1BIN(slot_nb_and, nb_and, "__and__", "__rand__") |
| 4847 | SLOT1BIN(slot_nb_xor, nb_xor, "__xor__", "__rxor__") |
| 4848 | SLOT1BIN(slot_nb_or, nb_or, "__or__", "__ror__") |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 4849 | |
| 4850 | static int |
| 4851 | slot_nb_coerce(PyObject **a, PyObject **b) |
| 4852 | { |
| 4853 | static PyObject *coerce_str; |
| 4854 | PyObject *self = *a, *other = *b; |
| 4855 | |
| 4856 | if (self->ob_type->tp_as_number != NULL && |
| 4857 | self->ob_type->tp_as_number->nb_coerce == slot_nb_coerce) { |
| 4858 | PyObject *r; |
| 4859 | r = call_maybe( |
| 4860 | self, "__coerce__", &coerce_str, "(O)", other); |
| 4861 | if (r == NULL) |
| 4862 | return -1; |
| 4863 | if (r == Py_NotImplemented) { |
| 4864 | Py_DECREF(r); |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 4865 | } |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4866 | else { |
| 4867 | if (!PyTuple_Check(r) || PyTuple_GET_SIZE(r) != 2) { |
| 4868 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 4869 | "__coerce__ didn't return a 2-tuple"); |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4870 | Py_DECREF(r); |
| 4871 | return -1; |
| 4872 | } |
| 4873 | *a = PyTuple_GET_ITEM(r, 0); |
| 4874 | Py_INCREF(*a); |
| 4875 | *b = PyTuple_GET_ITEM(r, 1); |
| 4876 | Py_INCREF(*b); |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 4877 | Py_DECREF(r); |
Guido van Rossum | 55f2099 | 2001-10-01 17:18:22 +0000 | [diff] [blame] | 4878 | return 0; |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 4879 | } |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 4880 | } |
| 4881 | if (other->ob_type->tp_as_number != NULL && |
| 4882 | other->ob_type->tp_as_number->nb_coerce == slot_nb_coerce) { |
| 4883 | PyObject *r; |
| 4884 | r = call_maybe( |
| 4885 | other, "__coerce__", &coerce_str, "(O)", self); |
| 4886 | if (r == NULL) |
| 4887 | return -1; |
| 4888 | if (r == Py_NotImplemented) { |
| 4889 | Py_DECREF(r); |
| 4890 | return 1; |
| 4891 | } |
| 4892 | if (!PyTuple_Check(r) || PyTuple_GET_SIZE(r) != 2) { |
| 4893 | PyErr_SetString(PyExc_TypeError, |
| 4894 | "__coerce__ didn't return a 2-tuple"); |
| 4895 | Py_DECREF(r); |
| 4896 | return -1; |
| 4897 | } |
| 4898 | *a = PyTuple_GET_ITEM(r, 1); |
| 4899 | Py_INCREF(*a); |
| 4900 | *b = PyTuple_GET_ITEM(r, 0); |
| 4901 | Py_INCREF(*b); |
| 4902 | Py_DECREF(r); |
| 4903 | return 0; |
| 4904 | } |
| 4905 | return 1; |
| 4906 | } |
| 4907 | |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4908 | SLOT0(slot_nb_int, "__int__") |
| 4909 | SLOT0(slot_nb_long, "__long__") |
| 4910 | SLOT0(slot_nb_float, "__float__") |
| 4911 | SLOT0(slot_nb_oct, "__oct__") |
| 4912 | SLOT0(slot_nb_hex, "__hex__") |
| 4913 | SLOT1(slot_nb_inplace_add, "__iadd__", PyObject *, "O") |
| 4914 | SLOT1(slot_nb_inplace_subtract, "__isub__", PyObject *, "O") |
| 4915 | SLOT1(slot_nb_inplace_multiply, "__imul__", PyObject *, "O") |
| 4916 | SLOT1(slot_nb_inplace_divide, "__idiv__", PyObject *, "O") |
| 4917 | SLOT1(slot_nb_inplace_remainder, "__imod__", PyObject *, "O") |
Martin v. Löwis | fd96326 | 2007-02-09 12:19:32 +0000 | [diff] [blame] | 4918 | /* Can't use SLOT1 here, because nb_inplace_power is ternary */ |
| 4919 | static PyObject * |
| 4920 | slot_nb_inplace_power(PyObject *self, PyObject * arg1, PyObject *arg2) |
| 4921 | { |
| 4922 | static PyObject *cache_str; |
| 4923 | return call_method(self, "__ipow__", &cache_str, "(" "O" ")", arg1); |
| 4924 | } |
Guido van Rossum | dc91b99 | 2001-08-08 22:26:22 +0000 | [diff] [blame] | 4925 | SLOT1(slot_nb_inplace_lshift, "__ilshift__", PyObject *, "O") |
| 4926 | SLOT1(slot_nb_inplace_rshift, "__irshift__", PyObject *, "O") |
| 4927 | SLOT1(slot_nb_inplace_and, "__iand__", PyObject *, "O") |
| 4928 | SLOT1(slot_nb_inplace_xor, "__ixor__", PyObject *, "O") |
| 4929 | SLOT1(slot_nb_inplace_or, "__ior__", PyObject *, "O") |
| 4930 | SLOT1BIN(slot_nb_floor_divide, nb_floor_divide, |
| 4931 | "__floordiv__", "__rfloordiv__") |
| 4932 | SLOT1BIN(slot_nb_true_divide, nb_true_divide, "__truediv__", "__rtruediv__") |
| 4933 | SLOT1(slot_nb_inplace_floor_divide, "__ifloordiv__", PyObject *, "O") |
| 4934 | SLOT1(slot_nb_inplace_true_divide, "__itruediv__", PyObject *, "O") |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4935 | |
| 4936 | static int |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4937 | half_compare(PyObject *self, PyObject *other) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4938 | { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4939 | PyObject *func, *args, *res; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4940 | static PyObject *cmp_str; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 4941 | Py_ssize_t c; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4942 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4943 | func = lookup_method(self, "__cmp__", &cmp_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4944 | if (func == NULL) { |
| 4945 | PyErr_Clear(); |
| 4946 | } |
| 4947 | else { |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 4948 | args = PyTuple_Pack(1, other); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4949 | if (args == NULL) |
| 4950 | res = NULL; |
| 4951 | else { |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 4952 | res = PyObject_Call(func, args, NULL); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4953 | Py_DECREF(args); |
| 4954 | } |
Raymond Hettinger | ab5dae3 | 2002-06-24 13:08:16 +0000 | [diff] [blame] | 4955 | Py_DECREF(func); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4956 | if (res != Py_NotImplemented) { |
| 4957 | if (res == NULL) |
| 4958 | return -2; |
| 4959 | c = PyInt_AsLong(res); |
| 4960 | Py_DECREF(res); |
| 4961 | if (c == -1 && PyErr_Occurred()) |
| 4962 | return -2; |
| 4963 | return (c < 0) ? -1 : (c > 0) ? 1 : 0; |
| 4964 | } |
| 4965 | Py_DECREF(res); |
| 4966 | } |
| 4967 | return 2; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 4968 | } |
| 4969 | |
Guido van Rossum | ab3b034 | 2001-09-18 20:38:53 +0000 | [diff] [blame] | 4970 | /* This slot is published for the benefit of try_3way_compare in object.c */ |
| 4971 | int |
| 4972 | _PyObject_SlotCompare(PyObject *self, PyObject *other) |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4973 | { |
| 4974 | int c; |
| 4975 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4976 | if (Py_TYPE(self)->tp_compare == _PyObject_SlotCompare) { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4977 | c = half_compare(self, other); |
| 4978 | if (c <= 1) |
| 4979 | return c; |
| 4980 | } |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 4981 | if (Py_TYPE(other)->tp_compare == _PyObject_SlotCompare) { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4982 | c = half_compare(other, self); |
| 4983 | if (c < -1) |
| 4984 | return -2; |
| 4985 | if (c <= 1) |
| 4986 | return -c; |
| 4987 | } |
| 4988 | return (void *)self < (void *)other ? -1 : |
| 4989 | (void *)self > (void *)other ? 1 : 0; |
| 4990 | } |
| 4991 | |
| 4992 | static PyObject * |
| 4993 | slot_tp_repr(PyObject *self) |
| 4994 | { |
| 4995 | PyObject *func, *res; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4996 | static PyObject *repr_str; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4997 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 4998 | func = lookup_method(self, "__repr__", &repr_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 4999 | if (func != NULL) { |
| 5000 | res = PyEval_CallObject(func, NULL); |
| 5001 | Py_DECREF(func); |
| 5002 | return res; |
| 5003 | } |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 5004 | PyErr_Clear(); |
| 5005 | return PyString_FromFormat("<%s object at %p>", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5006 | Py_TYPE(self)->tp_name, self); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5007 | } |
| 5008 | |
| 5009 | static PyObject * |
| 5010 | slot_tp_str(PyObject *self) |
| 5011 | { |
| 5012 | PyObject *func, *res; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5013 | static PyObject *str_str; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5014 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5015 | func = lookup_method(self, "__str__", &str_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5016 | if (func != NULL) { |
| 5017 | res = PyEval_CallObject(func, NULL); |
| 5018 | Py_DECREF(func); |
| 5019 | return res; |
| 5020 | } |
| 5021 | else { |
| 5022 | PyErr_Clear(); |
| 5023 | return slot_tp_repr(self); |
| 5024 | } |
| 5025 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5026 | |
| 5027 | static long |
| 5028 | slot_tp_hash(PyObject *self) |
| 5029 | { |
Tim Peters | 61ce0a9 | 2002-12-06 23:38:02 +0000 | [diff] [blame] | 5030 | PyObject *func; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5031 | static PyObject *hash_str, *eq_str, *cmp_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5032 | long h; |
| 5033 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5034 | func = lookup_method(self, "__hash__", &hash_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5035 | |
Guido van Rossum | 0b7b6fd | 2007-12-19 22:51:13 +0000 | [diff] [blame] | 5036 | if (func != NULL && func != Py_None) { |
Tim Peters | 61ce0a9 | 2002-12-06 23:38:02 +0000 | [diff] [blame] | 5037 | PyObject *res = PyEval_CallObject(func, NULL); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5038 | Py_DECREF(func); |
| 5039 | if (res == NULL) |
| 5040 | return -1; |
Martin v. Löwis | ab2f8f7 | 2006-08-09 07:57:39 +0000 | [diff] [blame] | 5041 | if (PyLong_Check(res)) |
Armin Rigo | 51fc8c4 | 2006-08-09 14:55:26 +0000 | [diff] [blame] | 5042 | h = PyLong_Type.tp_hash(res); |
Martin v. Löwis | ab2f8f7 | 2006-08-09 07:57:39 +0000 | [diff] [blame] | 5043 | else |
| 5044 | h = PyInt_AsLong(res); |
Tim Peters | 61ce0a9 | 2002-12-06 23:38:02 +0000 | [diff] [blame] | 5045 | Py_DECREF(res); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5046 | } |
| 5047 | else { |
Georg Brandl | 30b7804 | 2007-12-20 21:03:02 +0000 | [diff] [blame] | 5048 | Py_XDECREF(func); /* may be None */ |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5049 | PyErr_Clear(); |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5050 | func = lookup_method(self, "__eq__", &eq_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5051 | if (func == NULL) { |
| 5052 | PyErr_Clear(); |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5053 | func = lookup_method(self, "__cmp__", &cmp_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5054 | } |
| 5055 | if (func != NULL) { |
Georg Brandl | ccff785 | 2006-06-18 22:17:29 +0000 | [diff] [blame] | 5056 | PyErr_Format(PyExc_TypeError, "unhashable type: '%.200s'", |
| 5057 | self->ob_type->tp_name); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5058 | Py_DECREF(func); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5059 | return -1; |
| 5060 | } |
| 5061 | PyErr_Clear(); |
| 5062 | h = _Py_HashPointer((void *)self); |
| 5063 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5064 | if (h == -1 && !PyErr_Occurred()) |
| 5065 | h = -2; |
| 5066 | return h; |
| 5067 | } |
| 5068 | |
| 5069 | static PyObject * |
| 5070 | slot_tp_call(PyObject *self, PyObject *args, PyObject *kwds) |
| 5071 | { |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5072 | static PyObject *call_str; |
| 5073 | PyObject *meth = lookup_method(self, "__call__", &call_str); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5074 | PyObject *res; |
| 5075 | |
| 5076 | if (meth == NULL) |
| 5077 | return NULL; |
Armin Rigo | 53c1692f | 2006-06-21 21:58:50 +0000 | [diff] [blame] | 5078 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5079 | res = PyObject_Call(meth, args, kwds); |
Armin Rigo | 53c1692f | 2006-06-21 21:58:50 +0000 | [diff] [blame] | 5080 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5081 | Py_DECREF(meth); |
| 5082 | return res; |
| 5083 | } |
| 5084 | |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5085 | /* There are two slot dispatch functions for tp_getattro. |
| 5086 | |
| 5087 | - slot_tp_getattro() is used when __getattribute__ is overridden |
| 5088 | but no __getattr__ hook is present; |
| 5089 | |
| 5090 | - slot_tp_getattr_hook() is used when a __getattr__ hook is present. |
| 5091 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5092 | The code in update_one_slot() always installs slot_tp_getattr_hook(); this |
| 5093 | detects the absence of __getattr__ and then installs the simpler slot if |
| 5094 | necessary. */ |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5095 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5096 | static PyObject * |
| 5097 | slot_tp_getattro(PyObject *self, PyObject *name) |
| 5098 | { |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5099 | static PyObject *getattribute_str = NULL; |
| 5100 | return call_method(self, "__getattribute__", &getattribute_str, |
| 5101 | "(O)", name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5102 | } |
| 5103 | |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5104 | static PyObject * |
| 5105 | slot_tp_getattr_hook(PyObject *self, PyObject *name) |
| 5106 | { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5107 | PyTypeObject *tp = Py_TYPE(self); |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5108 | PyObject *getattr, *getattribute, *res; |
| 5109 | static PyObject *getattribute_str = NULL; |
| 5110 | static PyObject *getattr_str = NULL; |
| 5111 | |
| 5112 | if (getattr_str == NULL) { |
| 5113 | getattr_str = PyString_InternFromString("__getattr__"); |
| 5114 | if (getattr_str == NULL) |
| 5115 | return NULL; |
| 5116 | } |
| 5117 | if (getattribute_str == NULL) { |
| 5118 | getattribute_str = |
| 5119 | PyString_InternFromString("__getattribute__"); |
| 5120 | if (getattribute_str == NULL) |
| 5121 | return NULL; |
| 5122 | } |
| 5123 | getattr = _PyType_Lookup(tp, getattr_str); |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5124 | if (getattr == NULL) { |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5125 | /* No __getattr__ hook: use a simpler dispatcher */ |
| 5126 | tp->tp_getattro = slot_tp_getattro; |
| 5127 | return slot_tp_getattro(self, name); |
| 5128 | } |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5129 | getattribute = _PyType_Lookup(tp, getattribute_str); |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5130 | if (getattribute == NULL || |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5131 | (Py_TYPE(getattribute) == &PyWrapperDescr_Type && |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5132 | ((PyWrapperDescrObject *)getattribute)->d_wrapped == |
| 5133 | (void *)PyObject_GenericGetAttr)) |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5134 | res = PyObject_GenericGetAttr(self, name); |
| 5135 | else |
Georg Brandl | 684fd0c | 2006-05-25 19:15:31 +0000 | [diff] [blame] | 5136 | res = PyObject_CallFunctionObjArgs(getattribute, self, name, NULL); |
Guido van Rossum | 14a6f83 | 2001-10-17 13:59:09 +0000 | [diff] [blame] | 5137 | if (res == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) { |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5138 | PyErr_Clear(); |
Georg Brandl | 684fd0c | 2006-05-25 19:15:31 +0000 | [diff] [blame] | 5139 | res = PyObject_CallFunctionObjArgs(getattr, self, name, NULL); |
Guido van Rossum | 19c1cd5 | 2001-09-21 21:24:49 +0000 | [diff] [blame] | 5140 | } |
| 5141 | return res; |
| 5142 | } |
| 5143 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5144 | static int |
| 5145 | slot_tp_setattro(PyObject *self, PyObject *name, PyObject *value) |
| 5146 | { |
| 5147 | PyObject *res; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5148 | static PyObject *delattr_str, *setattr_str; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5149 | |
| 5150 | if (value == NULL) |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5151 | res = call_method(self, "__delattr__", &delattr_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5152 | "(O)", name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5153 | else |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5154 | res = call_method(self, "__setattr__", &setattr_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5155 | "(OO)", name, value); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5156 | if (res == NULL) |
| 5157 | return -1; |
| 5158 | Py_DECREF(res); |
| 5159 | return 0; |
| 5160 | } |
| 5161 | |
Guido van Rossum | 0b7b6fd | 2007-12-19 22:51:13 +0000 | [diff] [blame] | 5162 | static char *name_op[] = { |
| 5163 | "__lt__", |
| 5164 | "__le__", |
| 5165 | "__eq__", |
| 5166 | "__ne__", |
| 5167 | "__gt__", |
| 5168 | "__ge__", |
| 5169 | }; |
| 5170 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5171 | static PyObject * |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5172 | half_richcompare(PyObject *self, PyObject *other, int op) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5173 | { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5174 | PyObject *func, *args, *res; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5175 | static PyObject *op_str[6]; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5176 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5177 | func = lookup_method(self, name_op[op], &op_str[op]); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5178 | if (func == NULL) { |
| 5179 | PyErr_Clear(); |
| 5180 | Py_INCREF(Py_NotImplemented); |
| 5181 | return Py_NotImplemented; |
| 5182 | } |
Raymond Hettinger | 8ae4689 | 2003-10-12 19:09:37 +0000 | [diff] [blame] | 5183 | args = PyTuple_Pack(1, other); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5184 | if (args == NULL) |
| 5185 | res = NULL; |
| 5186 | else { |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5187 | res = PyObject_Call(func, args, NULL); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5188 | Py_DECREF(args); |
| 5189 | } |
| 5190 | Py_DECREF(func); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5191 | return res; |
| 5192 | } |
| 5193 | |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5194 | static PyObject * |
| 5195 | slot_tp_richcompare(PyObject *self, PyObject *other, int op) |
| 5196 | { |
| 5197 | PyObject *res; |
| 5198 | |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5199 | if (Py_TYPE(self)->tp_richcompare == slot_tp_richcompare) { |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5200 | res = half_richcompare(self, other, op); |
| 5201 | if (res != Py_NotImplemented) |
| 5202 | return res; |
| 5203 | Py_DECREF(res); |
| 5204 | } |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5205 | if (Py_TYPE(other)->tp_richcompare == slot_tp_richcompare) { |
Tim Peters | f4aca75 | 2004-09-23 02:39:37 +0000 | [diff] [blame] | 5206 | res = half_richcompare(other, self, _Py_SwappedOp[op]); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5207 | if (res != Py_NotImplemented) { |
| 5208 | return res; |
| 5209 | } |
| 5210 | Py_DECREF(res); |
| 5211 | } |
| 5212 | Py_INCREF(Py_NotImplemented); |
| 5213 | return Py_NotImplemented; |
| 5214 | } |
| 5215 | |
| 5216 | static PyObject * |
| 5217 | slot_tp_iter(PyObject *self) |
| 5218 | { |
| 5219 | PyObject *func, *res; |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5220 | static PyObject *iter_str, *getitem_str; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5221 | |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5222 | func = lookup_method(self, "__iter__", &iter_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5223 | if (func != NULL) { |
Guido van Rossum | 84b2bed | 2002-08-16 17:01:09 +0000 | [diff] [blame] | 5224 | PyObject *args; |
| 5225 | args = res = PyTuple_New(0); |
| 5226 | if (args != NULL) { |
| 5227 | res = PyObject_Call(func, args, NULL); |
| 5228 | Py_DECREF(args); |
| 5229 | } |
| 5230 | Py_DECREF(func); |
| 5231 | return res; |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5232 | } |
| 5233 | PyErr_Clear(); |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5234 | func = lookup_method(self, "__getitem__", &getitem_str); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5235 | if (func == NULL) { |
Georg Brandl | ccff785 | 2006-06-18 22:17:29 +0000 | [diff] [blame] | 5236 | PyErr_Format(PyExc_TypeError, |
| 5237 | "'%.200s' object is not iterable", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5238 | Py_TYPE(self)->tp_name); |
Guido van Rossum | b8f6366 | 2001-08-15 23:57:02 +0000 | [diff] [blame] | 5239 | return NULL; |
| 5240 | } |
| 5241 | Py_DECREF(func); |
| 5242 | return PySeqIter_New(self); |
| 5243 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5244 | |
| 5245 | static PyObject * |
| 5246 | slot_tp_iternext(PyObject *self) |
| 5247 | { |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5248 | static PyObject *next_str; |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5249 | return call_method(self, "next", &next_str, "()"); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5250 | } |
| 5251 | |
Guido van Rossum | 1a49350 | 2001-08-17 16:47:50 +0000 | [diff] [blame] | 5252 | static PyObject * |
| 5253 | slot_tp_descr_get(PyObject *self, PyObject *obj, PyObject *type) |
| 5254 | { |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5255 | PyTypeObject *tp = Py_TYPE(self); |
Guido van Rossum | 1a49350 | 2001-08-17 16:47:50 +0000 | [diff] [blame] | 5256 | PyObject *get; |
| 5257 | static PyObject *get_str = NULL; |
| 5258 | |
| 5259 | if (get_str == NULL) { |
| 5260 | get_str = PyString_InternFromString("__get__"); |
| 5261 | if (get_str == NULL) |
| 5262 | return NULL; |
| 5263 | } |
| 5264 | get = _PyType_Lookup(tp, get_str); |
| 5265 | if (get == NULL) { |
| 5266 | /* Avoid further slowdowns */ |
| 5267 | if (tp->tp_descr_get == slot_tp_descr_get) |
| 5268 | tp->tp_descr_get = NULL; |
| 5269 | Py_INCREF(self); |
| 5270 | return self; |
| 5271 | } |
Guido van Rossum | 2c25239 | 2001-08-24 10:13:31 +0000 | [diff] [blame] | 5272 | if (obj == NULL) |
| 5273 | obj = Py_None; |
| 5274 | if (type == NULL) |
| 5275 | type = Py_None; |
Georg Brandl | 684fd0c | 2006-05-25 19:15:31 +0000 | [diff] [blame] | 5276 | return PyObject_CallFunctionObjArgs(get, self, obj, type, NULL); |
Guido van Rossum | 1a49350 | 2001-08-17 16:47:50 +0000 | [diff] [blame] | 5277 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5278 | |
| 5279 | static int |
| 5280 | slot_tp_descr_set(PyObject *self, PyObject *target, PyObject *value) |
| 5281 | { |
Guido van Rossum | 2c25239 | 2001-08-24 10:13:31 +0000 | [diff] [blame] | 5282 | PyObject *res; |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5283 | static PyObject *del_str, *set_str; |
Guido van Rossum | 2c25239 | 2001-08-24 10:13:31 +0000 | [diff] [blame] | 5284 | |
| 5285 | if (value == NULL) |
Guido van Rossum | 1d5b3f2 | 2001-12-03 00:08:33 +0000 | [diff] [blame] | 5286 | res = call_method(self, "__delete__", &del_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5287 | "(O)", target); |
Guido van Rossum | 2c25239 | 2001-08-24 10:13:31 +0000 | [diff] [blame] | 5288 | else |
Guido van Rossum | 2730b13 | 2001-08-28 18:22:14 +0000 | [diff] [blame] | 5289 | res = call_method(self, "__set__", &set_str, |
Guido van Rossum | 717ce00 | 2001-09-14 16:58:08 +0000 | [diff] [blame] | 5290 | "(OO)", target, value); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5291 | if (res == NULL) |
| 5292 | return -1; |
| 5293 | Py_DECREF(res); |
| 5294 | return 0; |
| 5295 | } |
| 5296 | |
| 5297 | static int |
| 5298 | slot_tp_init(PyObject *self, PyObject *args, PyObject *kwds) |
| 5299 | { |
Guido van Rossum | 6071873 | 2001-08-28 17:47:51 +0000 | [diff] [blame] | 5300 | static PyObject *init_str; |
| 5301 | PyObject *meth = lookup_method(self, "__init__", &init_str); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5302 | PyObject *res; |
| 5303 | |
| 5304 | if (meth == NULL) |
| 5305 | return -1; |
| 5306 | res = PyObject_Call(meth, args, kwds); |
| 5307 | Py_DECREF(meth); |
| 5308 | if (res == NULL) |
| 5309 | return -1; |
Raymond Hettinger | b67cc80 | 2005-03-03 16:45:19 +0000 | [diff] [blame] | 5310 | if (res != Py_None) { |
Georg Brandl | ccff785 | 2006-06-18 22:17:29 +0000 | [diff] [blame] | 5311 | PyErr_Format(PyExc_TypeError, |
| 5312 | "__init__() should return None, not '%.200s'", |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5313 | Py_TYPE(res)->tp_name); |
Raymond Hettinger | b67cc80 | 2005-03-03 16:45:19 +0000 | [diff] [blame] | 5314 | Py_DECREF(res); |
| 5315 | return -1; |
| 5316 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5317 | Py_DECREF(res); |
| 5318 | return 0; |
| 5319 | } |
| 5320 | |
| 5321 | static PyObject * |
| 5322 | slot_tp_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
| 5323 | { |
Guido van Rossum | 7bed213 | 2002-08-08 21:57:53 +0000 | [diff] [blame] | 5324 | static PyObject *new_str; |
| 5325 | PyObject *func; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5326 | PyObject *newargs, *x; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5327 | Py_ssize_t i, n; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5328 | |
Guido van Rossum | 7bed213 | 2002-08-08 21:57:53 +0000 | [diff] [blame] | 5329 | if (new_str == NULL) { |
| 5330 | new_str = PyString_InternFromString("__new__"); |
| 5331 | if (new_str == NULL) |
| 5332 | return NULL; |
| 5333 | } |
| 5334 | func = PyObject_GetAttr((PyObject *)type, new_str); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5335 | if (func == NULL) |
| 5336 | return NULL; |
| 5337 | assert(PyTuple_Check(args)); |
| 5338 | n = PyTuple_GET_SIZE(args); |
| 5339 | newargs = PyTuple_New(n+1); |
| 5340 | if (newargs == NULL) |
| 5341 | return NULL; |
| 5342 | Py_INCREF(type); |
| 5343 | PyTuple_SET_ITEM(newargs, 0, (PyObject *)type); |
| 5344 | for (i = 0; i < n; i++) { |
| 5345 | x = PyTuple_GET_ITEM(args, i); |
| 5346 | Py_INCREF(x); |
| 5347 | PyTuple_SET_ITEM(newargs, i+1, x); |
| 5348 | } |
| 5349 | x = PyObject_Call(func, newargs, kwds); |
Guido van Rossum | 25d1807 | 2001-10-01 15:55:28 +0000 | [diff] [blame] | 5350 | Py_DECREF(newargs); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5351 | Py_DECREF(func); |
| 5352 | return x; |
| 5353 | } |
| 5354 | |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5355 | static void |
| 5356 | slot_tp_del(PyObject *self) |
| 5357 | { |
| 5358 | static PyObject *del_str = NULL; |
| 5359 | PyObject *del, *res; |
| 5360 | PyObject *error_type, *error_value, *error_traceback; |
| 5361 | |
| 5362 | /* Temporarily resurrect the object. */ |
| 5363 | assert(self->ob_refcnt == 0); |
| 5364 | self->ob_refcnt = 1; |
| 5365 | |
| 5366 | /* Save the current exception, if any. */ |
| 5367 | PyErr_Fetch(&error_type, &error_value, &error_traceback); |
| 5368 | |
| 5369 | /* Execute __del__ method, if any. */ |
| 5370 | del = lookup_maybe(self, "__del__", &del_str); |
| 5371 | if (del != NULL) { |
| 5372 | res = PyEval_CallObject(del, NULL); |
| 5373 | if (res == NULL) |
| 5374 | PyErr_WriteUnraisable(del); |
| 5375 | else |
| 5376 | Py_DECREF(res); |
| 5377 | Py_DECREF(del); |
| 5378 | } |
| 5379 | |
| 5380 | /* Restore the saved exception. */ |
| 5381 | PyErr_Restore(error_type, error_value, error_traceback); |
| 5382 | |
| 5383 | /* Undo the temporary resurrection; can't use DECREF here, it would |
| 5384 | * cause a recursive call. |
| 5385 | */ |
| 5386 | assert(self->ob_refcnt > 0); |
| 5387 | if (--self->ob_refcnt == 0) |
| 5388 | return; /* this is the normal path out */ |
| 5389 | |
| 5390 | /* __del__ resurrected it! Make it look like the original Py_DECREF |
| 5391 | * never happened. |
| 5392 | */ |
| 5393 | { |
Martin v. Löwis | 725507b | 2006-03-07 12:08:51 +0000 | [diff] [blame] | 5394 | Py_ssize_t refcnt = self->ob_refcnt; |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5395 | _Py_NewReference(self); |
| 5396 | self->ob_refcnt = refcnt; |
| 5397 | } |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5398 | assert(!PyType_IS_GC(Py_TYPE(self)) || |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5399 | _Py_AS_GC(self)->gc.gc_refs != _PyGC_REFS_UNTRACKED); |
Michael W. Hudson | 3f3b668 | 2004-08-03 10:21:03 +0000 | [diff] [blame] | 5400 | /* If Py_REF_DEBUG, _Py_NewReference bumped _Py_RefTotal, so |
| 5401 | * we need to undo that. */ |
| 5402 | _Py_DEC_REFTOTAL; |
| 5403 | /* If Py_TRACE_REFS, _Py_NewReference re-added self to the object |
| 5404 | * chain, so no more to do there. |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5405 | * If COUNT_ALLOCS, the original decref bumped tp_frees, and |
| 5406 | * _Py_NewReference bumped tp_allocs: both of those need to be |
| 5407 | * undone. |
| 5408 | */ |
| 5409 | #ifdef COUNT_ALLOCS |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5410 | --Py_TYPE(self)->tp_frees; |
| 5411 | --Py_TYPE(self)->tp_allocs; |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5412 | #endif |
| 5413 | } |
| 5414 | |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5415 | |
| 5416 | /* 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] | 5417 | functions. The offsets here are relative to the 'PyHeapTypeObject' |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5418 | structure, which incorporates the additional structures used for numbers, |
| 5419 | sequences and mappings. |
| 5420 | 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] | 5421 | __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] | 5422 | slots (e.g. __str__ affects tp_str as well as tp_repr). The table is |
| 5423 | terminated with an all-zero entry. (This table is further initialized and |
| 5424 | sorted in init_slotdefs() below.) */ |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5425 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5426 | typedef struct wrapperbase slotdef; |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5427 | |
| 5428 | #undef TPSLOT |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5429 | #undef FLSLOT |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5430 | #undef ETSLOT |
| 5431 | #undef SQSLOT |
| 5432 | #undef MPSLOT |
| 5433 | #undef NBSLOT |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5434 | #undef UNSLOT |
| 5435 | #undef IBSLOT |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5436 | #undef BINSLOT |
| 5437 | #undef RBINSLOT |
| 5438 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5439 | #define TPSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
Neal Norwitz | d47714a | 2002-08-13 19:01:38 +0000 | [diff] [blame] | 5440 | {NAME, offsetof(PyTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \ |
| 5441 | PyDoc_STR(DOC)} |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5442 | #define FLSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC, FLAGS) \ |
| 5443 | {NAME, offsetof(PyTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \ |
Neal Norwitz | d47714a | 2002-08-13 19:01:38 +0000 | [diff] [blame] | 5444 | PyDoc_STR(DOC), FLAGS} |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5445 | #define ETSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5446 | {NAME, offsetof(PyHeapTypeObject, SLOT), (void *)(FUNCTION), WRAPPER, \ |
Neal Norwitz | d47714a | 2002-08-13 19:01:38 +0000 | [diff] [blame] | 5447 | PyDoc_STR(DOC)} |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5448 | #define SQSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5449 | ETSLOT(NAME, as_sequence.SLOT, FUNCTION, WRAPPER, DOC) |
| 5450 | #define MPSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5451 | ETSLOT(NAME, as_mapping.SLOT, FUNCTION, WRAPPER, DOC) |
| 5452 | #define NBSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5453 | ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, DOC) |
| 5454 | #define UNSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5455 | ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, \ |
| 5456 | "x." NAME "() <==> " DOC) |
| 5457 | #define IBSLOT(NAME, SLOT, FUNCTION, WRAPPER, DOC) \ |
| 5458 | ETSLOT(NAME, as_number.SLOT, FUNCTION, WRAPPER, \ |
| 5459 | "x." NAME "(y) <==> x" DOC "y") |
| 5460 | #define BINSLOT(NAME, SLOT, FUNCTION, DOC) \ |
| 5461 | ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_l, \ |
| 5462 | "x." NAME "(y) <==> x" DOC "y") |
| 5463 | #define RBINSLOT(NAME, SLOT, FUNCTION, DOC) \ |
| 5464 | ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_r, \ |
| 5465 | "x." NAME "(y) <==> y" DOC "x") |
Anthony Baxter | 5661699 | 2005-06-03 14:12:21 +0000 | [diff] [blame] | 5466 | #define BINSLOTNOTINFIX(NAME, SLOT, FUNCTION, DOC) \ |
| 5467 | ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_l, \ |
| 5468 | "x." NAME "(y) <==> " DOC) |
| 5469 | #define RBINSLOTNOTINFIX(NAME, SLOT, FUNCTION, DOC) \ |
| 5470 | ETSLOT(NAME, as_number.SLOT, FUNCTION, wrap_binaryfunc_r, \ |
| 5471 | "x." NAME "(y) <==> " DOC) |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5472 | |
| 5473 | static slotdef slotdefs[] = { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5474 | SQSLOT("__len__", sq_length, slot_sq_length, wrap_lenfunc, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5475 | "x.__len__() <==> len(x)"), |
Armin Rigo | fd163f9 | 2005-12-29 15:59:19 +0000 | [diff] [blame] | 5476 | /* Heap types defining __add__/__mul__ have sq_concat/sq_repeat == NULL. |
| 5477 | The logic in abstract.c always falls back to nb_add/nb_multiply in |
| 5478 | this case. Defining both the nb_* and the sq_* slots to call the |
| 5479 | user-defined methods has unexpected side-effects, as shown by |
| 5480 | test_descr.notimplemented() */ |
| 5481 | SQSLOT("__add__", sq_concat, NULL, wrap_binaryfunc, |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5482 | "x.__add__(y) <==> x+y"), |
Armin Rigo | 314861c | 2006-03-30 14:04:02 +0000 | [diff] [blame] | 5483 | SQSLOT("__mul__", sq_repeat, NULL, wrap_indexargfunc, |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5484 | "x.__mul__(n) <==> x*n"), |
Armin Rigo | 314861c | 2006-03-30 14:04:02 +0000 | [diff] [blame] | 5485 | SQSLOT("__rmul__", sq_repeat, NULL, wrap_indexargfunc, |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5486 | "x.__rmul__(n) <==> n*x"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5487 | SQSLOT("__getitem__", sq_item, slot_sq_item, wrap_sq_item, |
| 5488 | "x.__getitem__(y) <==> x[y]"), |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5489 | SQSLOT("__getslice__", sq_slice, slot_sq_slice, wrap_ssizessizeargfunc, |
Brett Cannon | 154da9b | 2003-05-20 02:30:04 +0000 | [diff] [blame] | 5490 | "x.__getslice__(i, j) <==> x[i:j]\n\ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5491 | \n\ |
| 5492 | Use of negative indices is not supported."), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5493 | SQSLOT("__setitem__", sq_ass_item, slot_sq_ass_item, wrap_sq_setitem, |
Brett Cannon | be67d87 | 2003-05-20 02:40:12 +0000 | [diff] [blame] | 5494 | "x.__setitem__(i, y) <==> x[i]=y"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5495 | SQSLOT("__delitem__", sq_ass_item, slot_sq_ass_item, wrap_sq_delitem, |
Brett Cannon | be67d87 | 2003-05-20 02:40:12 +0000 | [diff] [blame] | 5496 | "x.__delitem__(y) <==> del x[y]"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5497 | SQSLOT("__setslice__", sq_ass_slice, slot_sq_ass_slice, |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5498 | wrap_ssizessizeobjargproc, |
Brett Cannon | be67d87 | 2003-05-20 02:40:12 +0000 | [diff] [blame] | 5499 | "x.__setslice__(i, j, y) <==> x[i:j]=y\n\ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5500 | \n\ |
| 5501 | Use of negative indices is not supported."), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5502 | SQSLOT("__delslice__", sq_ass_slice, slot_sq_ass_slice, wrap_delslice, |
Brett Cannon | be67d87 | 2003-05-20 02:40:12 +0000 | [diff] [blame] | 5503 | "x.__delslice__(i, j) <==> del x[i:j]\n\ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5504 | \n\ |
| 5505 | Use of negative indices is not supported."), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5506 | SQSLOT("__contains__", sq_contains, slot_sq_contains, wrap_objobjproc, |
| 5507 | "x.__contains__(y) <==> y in x"), |
Armin Rigo | fd163f9 | 2005-12-29 15:59:19 +0000 | [diff] [blame] | 5508 | SQSLOT("__iadd__", sq_inplace_concat, NULL, |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5509 | wrap_binaryfunc, "x.__iadd__(y) <==> x+=y"), |
Armin Rigo | fd163f9 | 2005-12-29 15:59:19 +0000 | [diff] [blame] | 5510 | SQSLOT("__imul__", sq_inplace_repeat, NULL, |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5511 | wrap_indexargfunc, "x.__imul__(y) <==> x*=y"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5512 | |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5513 | MPSLOT("__len__", mp_length, slot_mp_length, wrap_lenfunc, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5514 | "x.__len__() <==> len(x)"), |
Guido van Rossum | fd38f8e | 2001-10-09 20:17:57 +0000 | [diff] [blame] | 5515 | MPSLOT("__getitem__", mp_subscript, slot_mp_subscript, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5516 | wrap_binaryfunc, |
| 5517 | "x.__getitem__(y) <==> x[y]"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5518 | MPSLOT("__setitem__", mp_ass_subscript, slot_mp_ass_subscript, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5519 | wrap_objobjargproc, |
| 5520 | "x.__setitem__(i, y) <==> x[i]=y"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5521 | MPSLOT("__delitem__", mp_ass_subscript, slot_mp_ass_subscript, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5522 | wrap_delitem, |
| 5523 | "x.__delitem__(y) <==> del x[y]"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5524 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5525 | BINSLOT("__add__", nb_add, slot_nb_add, |
| 5526 | "+"), |
| 5527 | RBINSLOT("__radd__", nb_add, slot_nb_add, |
| 5528 | "+"), |
| 5529 | BINSLOT("__sub__", nb_subtract, slot_nb_subtract, |
| 5530 | "-"), |
| 5531 | RBINSLOT("__rsub__", nb_subtract, slot_nb_subtract, |
| 5532 | "-"), |
| 5533 | BINSLOT("__mul__", nb_multiply, slot_nb_multiply, |
| 5534 | "*"), |
| 5535 | RBINSLOT("__rmul__", nb_multiply, slot_nb_multiply, |
| 5536 | "*"), |
| 5537 | BINSLOT("__div__", nb_divide, slot_nb_divide, |
| 5538 | "/"), |
| 5539 | RBINSLOT("__rdiv__", nb_divide, slot_nb_divide, |
| 5540 | "/"), |
| 5541 | BINSLOT("__mod__", nb_remainder, slot_nb_remainder, |
| 5542 | "%"), |
| 5543 | RBINSLOT("__rmod__", nb_remainder, slot_nb_remainder, |
| 5544 | "%"), |
Anthony Baxter | 5661699 | 2005-06-03 14:12:21 +0000 | [diff] [blame] | 5545 | BINSLOTNOTINFIX("__divmod__", nb_divmod, slot_nb_divmod, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5546 | "divmod(x, y)"), |
Anthony Baxter | 5661699 | 2005-06-03 14:12:21 +0000 | [diff] [blame] | 5547 | RBINSLOTNOTINFIX("__rdivmod__", nb_divmod, slot_nb_divmod, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5548 | "divmod(y, x)"), |
| 5549 | NBSLOT("__pow__", nb_power, slot_nb_power, wrap_ternaryfunc, |
| 5550 | "x.__pow__(y[, z]) <==> pow(x, y[, z])"), |
| 5551 | NBSLOT("__rpow__", nb_power, slot_nb_power, wrap_ternaryfunc_r, |
| 5552 | "y.__rpow__(x[, z]) <==> pow(x, y[, z])"), |
| 5553 | UNSLOT("__neg__", nb_negative, slot_nb_negative, wrap_unaryfunc, "-x"), |
| 5554 | UNSLOT("__pos__", nb_positive, slot_nb_positive, wrap_unaryfunc, "+x"), |
| 5555 | UNSLOT("__abs__", nb_absolute, slot_nb_absolute, wrap_unaryfunc, |
| 5556 | "abs(x)"), |
Raymond Hettinger | f34f264 | 2003-10-11 17:29:04 +0000 | [diff] [blame] | 5557 | UNSLOT("__nonzero__", nb_nonzero, slot_nb_nonzero, wrap_inquirypred, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5558 | "x != 0"), |
| 5559 | UNSLOT("__invert__", nb_invert, slot_nb_invert, wrap_unaryfunc, "~x"), |
| 5560 | BINSLOT("__lshift__", nb_lshift, slot_nb_lshift, "<<"), |
| 5561 | RBINSLOT("__rlshift__", nb_lshift, slot_nb_lshift, "<<"), |
| 5562 | BINSLOT("__rshift__", nb_rshift, slot_nb_rshift, ">>"), |
| 5563 | RBINSLOT("__rrshift__", nb_rshift, slot_nb_rshift, ">>"), |
| 5564 | BINSLOT("__and__", nb_and, slot_nb_and, "&"), |
| 5565 | RBINSLOT("__rand__", nb_and, slot_nb_and, "&"), |
| 5566 | BINSLOT("__xor__", nb_xor, slot_nb_xor, "^"), |
| 5567 | RBINSLOT("__rxor__", nb_xor, slot_nb_xor, "^"), |
| 5568 | BINSLOT("__or__", nb_or, slot_nb_or, "|"), |
| 5569 | RBINSLOT("__ror__", nb_or, slot_nb_or, "|"), |
| 5570 | NBSLOT("__coerce__", nb_coerce, slot_nb_coerce, wrap_coercefunc, |
| 5571 | "x.__coerce__(y) <==> coerce(x, y)"), |
| 5572 | UNSLOT("__int__", nb_int, slot_nb_int, wrap_unaryfunc, |
| 5573 | "int(x)"), |
| 5574 | UNSLOT("__long__", nb_long, slot_nb_long, wrap_unaryfunc, |
| 5575 | "long(x)"), |
| 5576 | UNSLOT("__float__", nb_float, slot_nb_float, wrap_unaryfunc, |
| 5577 | "float(x)"), |
| 5578 | UNSLOT("__oct__", nb_oct, slot_nb_oct, wrap_unaryfunc, |
| 5579 | "oct(x)"), |
| 5580 | UNSLOT("__hex__", nb_hex, slot_nb_hex, wrap_unaryfunc, |
| 5581 | "hex(x)"), |
Neal Norwitz | 8a87f5d | 2006-08-12 17:03:09 +0000 | [diff] [blame] | 5582 | NBSLOT("__index__", nb_index, slot_nb_index, wrap_unaryfunc, |
Guido van Rossum | 38fff8c | 2006-03-07 18:50:55 +0000 | [diff] [blame] | 5583 | "x[y:z] <==> x[y.__index__():z.__index__()]"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5584 | IBSLOT("__iadd__", nb_inplace_add, slot_nb_inplace_add, |
| 5585 | wrap_binaryfunc, "+"), |
| 5586 | IBSLOT("__isub__", nb_inplace_subtract, slot_nb_inplace_subtract, |
| 5587 | wrap_binaryfunc, "-"), |
| 5588 | IBSLOT("__imul__", nb_inplace_multiply, slot_nb_inplace_multiply, |
| 5589 | wrap_binaryfunc, "*"), |
| 5590 | IBSLOT("__idiv__", nb_inplace_divide, slot_nb_inplace_divide, |
| 5591 | wrap_binaryfunc, "/"), |
| 5592 | IBSLOT("__imod__", nb_inplace_remainder, slot_nb_inplace_remainder, |
| 5593 | wrap_binaryfunc, "%"), |
| 5594 | IBSLOT("__ipow__", nb_inplace_power, slot_nb_inplace_power, |
Guido van Rossum | 6e5680f | 2002-10-15 01:01:53 +0000 | [diff] [blame] | 5595 | wrap_binaryfunc, "**"), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5596 | IBSLOT("__ilshift__", nb_inplace_lshift, slot_nb_inplace_lshift, |
| 5597 | wrap_binaryfunc, "<<"), |
| 5598 | IBSLOT("__irshift__", nb_inplace_rshift, slot_nb_inplace_rshift, |
| 5599 | wrap_binaryfunc, ">>"), |
| 5600 | IBSLOT("__iand__", nb_inplace_and, slot_nb_inplace_and, |
| 5601 | wrap_binaryfunc, "&"), |
| 5602 | IBSLOT("__ixor__", nb_inplace_xor, slot_nb_inplace_xor, |
| 5603 | wrap_binaryfunc, "^"), |
| 5604 | IBSLOT("__ior__", nb_inplace_or, slot_nb_inplace_or, |
| 5605 | wrap_binaryfunc, "|"), |
| 5606 | BINSLOT("__floordiv__", nb_floor_divide, slot_nb_floor_divide, "//"), |
| 5607 | RBINSLOT("__rfloordiv__", nb_floor_divide, slot_nb_floor_divide, "//"), |
| 5608 | BINSLOT("__truediv__", nb_true_divide, slot_nb_true_divide, "/"), |
| 5609 | RBINSLOT("__rtruediv__", nb_true_divide, slot_nb_true_divide, "/"), |
| 5610 | IBSLOT("__ifloordiv__", nb_inplace_floor_divide, |
| 5611 | slot_nb_inplace_floor_divide, wrap_binaryfunc, "//"), |
| 5612 | IBSLOT("__itruediv__", nb_inplace_true_divide, |
| 5613 | slot_nb_inplace_true_divide, wrap_binaryfunc, "/"), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5614 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5615 | TPSLOT("__str__", tp_str, slot_tp_str, wrap_unaryfunc, |
| 5616 | "x.__str__() <==> str(x)"), |
Guido van Rossum | afe7a94 | 2001-10-29 14:33:44 +0000 | [diff] [blame] | 5617 | TPSLOT("__str__", tp_print, NULL, NULL, ""), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5618 | TPSLOT("__repr__", tp_repr, slot_tp_repr, wrap_unaryfunc, |
| 5619 | "x.__repr__() <==> repr(x)"), |
Guido van Rossum | afe7a94 | 2001-10-29 14:33:44 +0000 | [diff] [blame] | 5620 | TPSLOT("__repr__", tp_print, NULL, NULL, ""), |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5621 | TPSLOT("__cmp__", tp_compare, _PyObject_SlotCompare, wrap_cmpfunc, |
| 5622 | "x.__cmp__(y) <==> cmp(x,y)"), |
| 5623 | TPSLOT("__hash__", tp_hash, slot_tp_hash, wrap_hashfunc, |
| 5624 | "x.__hash__() <==> hash(x)"), |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5625 | FLSLOT("__call__", tp_call, slot_tp_call, (wrapperfunc)wrap_call, |
| 5626 | "x.__call__(...) <==> x(...)", PyWrapperFlag_KEYWORDS), |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5627 | TPSLOT("__getattribute__", tp_getattro, slot_tp_getattr_hook, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5628 | wrap_binaryfunc, "x.__getattribute__('name') <==> x.name"), |
| 5629 | TPSLOT("__getattribute__", tp_getattr, NULL, NULL, ""), |
| 5630 | TPSLOT("__getattr__", tp_getattro, slot_tp_getattr_hook, NULL, ""), |
| 5631 | TPSLOT("__getattr__", tp_getattr, NULL, NULL, ""), |
| 5632 | TPSLOT("__setattr__", tp_setattro, slot_tp_setattro, wrap_setattr, |
| 5633 | "x.__setattr__('name', value) <==> x.name = value"), |
| 5634 | TPSLOT("__setattr__", tp_setattr, NULL, NULL, ""), |
| 5635 | TPSLOT("__delattr__", tp_setattro, slot_tp_setattro, wrap_delattr, |
| 5636 | "x.__delattr__('name') <==> del x.name"), |
| 5637 | TPSLOT("__delattr__", tp_setattr, NULL, NULL, ""), |
| 5638 | TPSLOT("__lt__", tp_richcompare, slot_tp_richcompare, richcmp_lt, |
| 5639 | "x.__lt__(y) <==> x<y"), |
| 5640 | TPSLOT("__le__", tp_richcompare, slot_tp_richcompare, richcmp_le, |
| 5641 | "x.__le__(y) <==> x<=y"), |
| 5642 | TPSLOT("__eq__", tp_richcompare, slot_tp_richcompare, richcmp_eq, |
| 5643 | "x.__eq__(y) <==> x==y"), |
| 5644 | TPSLOT("__ne__", tp_richcompare, slot_tp_richcompare, richcmp_ne, |
| 5645 | "x.__ne__(y) <==> x!=y"), |
| 5646 | TPSLOT("__gt__", tp_richcompare, slot_tp_richcompare, richcmp_gt, |
| 5647 | "x.__gt__(y) <==> x>y"), |
| 5648 | TPSLOT("__ge__", tp_richcompare, slot_tp_richcompare, richcmp_ge, |
| 5649 | "x.__ge__(y) <==> x>=y"), |
| 5650 | TPSLOT("__iter__", tp_iter, slot_tp_iter, wrap_unaryfunc, |
| 5651 | "x.__iter__() <==> iter(x)"), |
| 5652 | TPSLOT("next", tp_iternext, slot_tp_iternext, wrap_next, |
| 5653 | "x.next() -> the next value, or raise StopIteration"), |
| 5654 | TPSLOT("__get__", tp_descr_get, slot_tp_descr_get, wrap_descr_get, |
| 5655 | "descr.__get__(obj[, type]) -> value"), |
| 5656 | TPSLOT("__set__", tp_descr_set, slot_tp_descr_set, wrap_descr_set, |
| 5657 | "descr.__set__(obj, value)"), |
Guido van Rossum | 0dbab4c5 | 2002-08-01 14:39:25 +0000 | [diff] [blame] | 5658 | TPSLOT("__delete__", tp_descr_set, slot_tp_descr_set, |
| 5659 | wrap_descr_delete, "descr.__delete__(obj)"), |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5660 | FLSLOT("__init__", tp_init, slot_tp_init, (wrapperfunc)wrap_init, |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5661 | "x.__init__(...) initializes x; " |
Guido van Rossum | c8e5645 | 2001-10-22 00:43:43 +0000 | [diff] [blame] | 5662 | "see x.__class__.__doc__ for signature", |
| 5663 | PyWrapperFlag_KEYWORDS), |
| 5664 | TPSLOT("__new__", tp_new, slot_tp_new, NULL, ""), |
Guido van Rossum | febd61d | 2002-08-08 20:55:20 +0000 | [diff] [blame] | 5665 | TPSLOT("__del__", tp_del, slot_tp_del, NULL, ""), |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5666 | {NULL} |
| 5667 | }; |
| 5668 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5669 | /* Given a type pointer and an offset gotten from a slotdef entry, return a |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5670 | 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] | 5671 | the offset to the type pointer, since it takes care to indirect through the |
| 5672 | proper indirection pointer (as_buffer, etc.); it returns NULL if the |
| 5673 | indirection pointer is NULL. */ |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5674 | static void ** |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5675 | slotptr(PyTypeObject *type, int ioffset) |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5676 | { |
| 5677 | char *ptr; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5678 | long offset = ioffset; |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5679 | |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5680 | /* Note: this depends on the order of the members of PyHeapTypeObject! */ |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5681 | assert(offset >= 0); |
Skip Montanaro | 429433b | 2006-04-18 00:35:43 +0000 | [diff] [blame] | 5682 | assert((size_t)offset < offsetof(PyHeapTypeObject, as_buffer)); |
| 5683 | if ((size_t)offset >= offsetof(PyHeapTypeObject, as_sequence)) { |
Martin v. Löwis | ee36d65 | 2006-04-11 09:08:02 +0000 | [diff] [blame] | 5684 | ptr = (char *)type->tp_as_sequence; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5685 | offset -= offsetof(PyHeapTypeObject, as_sequence); |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5686 | } |
Skip Montanaro | 429433b | 2006-04-18 00:35:43 +0000 | [diff] [blame] | 5687 | else if ((size_t)offset >= offsetof(PyHeapTypeObject, as_mapping)) { |
Martin v. Löwis | ee36d65 | 2006-04-11 09:08:02 +0000 | [diff] [blame] | 5688 | ptr = (char *)type->tp_as_mapping; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5689 | offset -= offsetof(PyHeapTypeObject, as_mapping); |
Guido van Rossum | 09638c1 | 2002-06-13 19:17:46 +0000 | [diff] [blame] | 5690 | } |
Skip Montanaro | 429433b | 2006-04-18 00:35:43 +0000 | [diff] [blame] | 5691 | else if ((size_t)offset >= offsetof(PyHeapTypeObject, as_number)) { |
Martin v. Löwis | ee36d65 | 2006-04-11 09:08:02 +0000 | [diff] [blame] | 5692 | ptr = (char *)type->tp_as_number; |
Guido van Rossum | e5c691a | 2003-03-07 15:13:17 +0000 | [diff] [blame] | 5693 | offset -= offsetof(PyHeapTypeObject, as_number); |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5694 | } |
| 5695 | else { |
Martin v. Löwis | ee36d65 | 2006-04-11 09:08:02 +0000 | [diff] [blame] | 5696 | ptr = (char *)type; |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5697 | } |
| 5698 | if (ptr != NULL) |
| 5699 | ptr += offset; |
| 5700 | return (void **)ptr; |
| 5701 | } |
Guido van Rossum | f040ede | 2001-08-07 16:40:56 +0000 | [diff] [blame] | 5702 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5703 | /* Length of array of slotdef pointers used to store slots with the |
| 5704 | same __name__. There should be at most MAX_EQUIV-1 slotdef entries with |
| 5705 | the same __name__, for any __name__. Since that's a static property, it is |
| 5706 | appropriate to declare fixed-size arrays for this. */ |
| 5707 | #define MAX_EQUIV 10 |
| 5708 | |
| 5709 | /* Return a slot pointer for a given name, but ONLY if the attribute has |
| 5710 | exactly one slot function. The name must be an interned string. */ |
| 5711 | static void ** |
| 5712 | resolve_slotdups(PyTypeObject *type, PyObject *name) |
| 5713 | { |
| 5714 | /* XXX Maybe this could be optimized more -- but is it worth it? */ |
| 5715 | |
| 5716 | /* pname and ptrs act as a little cache */ |
| 5717 | static PyObject *pname; |
| 5718 | static slotdef *ptrs[MAX_EQUIV]; |
| 5719 | slotdef *p, **pp; |
| 5720 | void **res, **ptr; |
| 5721 | |
| 5722 | if (pname != name) { |
| 5723 | /* Collect all slotdefs that match name into ptrs. */ |
| 5724 | pname = name; |
| 5725 | pp = ptrs; |
| 5726 | for (p = slotdefs; p->name_strobj; p++) { |
| 5727 | if (p->name_strobj == name) |
| 5728 | *pp++ = p; |
| 5729 | } |
| 5730 | *pp = NULL; |
| 5731 | } |
| 5732 | |
| 5733 | /* Look in all matching slots of the type; if exactly one of these has |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5734 | a filled-in slot, return its value. Otherwise return NULL. */ |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5735 | res = NULL; |
| 5736 | for (pp = ptrs; *pp; pp++) { |
| 5737 | ptr = slotptr(type, (*pp)->offset); |
| 5738 | if (ptr == NULL || *ptr == NULL) |
| 5739 | continue; |
| 5740 | if (res != NULL) |
| 5741 | return NULL; |
| 5742 | res = ptr; |
| 5743 | } |
| 5744 | return res; |
| 5745 | } |
| 5746 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5747 | /* Common code for update_slots_callback() and fixup_slot_dispatchers(). This |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5748 | does some incredibly complex thinking and then sticks something into the |
| 5749 | slot. (It sees if the adjacent slotdefs for the same slot have conflicting |
| 5750 | interests, and then stores a generic wrapper or a specific function into |
| 5751 | the slot.) Return a pointer to the next slotdef with a different offset, |
| 5752 | because that's convenient for fixup_slot_dispatchers(). */ |
| 5753 | static slotdef * |
| 5754 | update_one_slot(PyTypeObject *type, slotdef *p) |
| 5755 | { |
| 5756 | PyObject *descr; |
| 5757 | PyWrapperDescrObject *d; |
| 5758 | void *generic = NULL, *specific = NULL; |
| 5759 | int use_generic = 0; |
| 5760 | int offset = p->offset; |
| 5761 | void **ptr = slotptr(type, offset); |
| 5762 | |
| 5763 | if (ptr == NULL) { |
| 5764 | do { |
| 5765 | ++p; |
| 5766 | } while (p->offset == offset); |
| 5767 | return p; |
| 5768 | } |
| 5769 | do { |
| 5770 | descr = _PyType_Lookup(type, p->name_strobj); |
| 5771 | if (descr == NULL) |
| 5772 | continue; |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5773 | if (Py_TYPE(descr) == &PyWrapperDescr_Type) { |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5774 | void **tptr = resolve_slotdups(type, p->name_strobj); |
| 5775 | if (tptr == NULL || tptr == ptr) |
| 5776 | generic = p->function; |
| 5777 | d = (PyWrapperDescrObject *)descr; |
| 5778 | if (d->d_base->wrapper == p->wrapper && |
| 5779 | PyType_IsSubtype(type, d->d_type)) |
| 5780 | { |
| 5781 | if (specific == NULL || |
| 5782 | specific == d->d_wrapped) |
| 5783 | specific = d->d_wrapped; |
| 5784 | else |
| 5785 | use_generic = 1; |
| 5786 | } |
| 5787 | } |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 5788 | else if (Py_TYPE(descr) == &PyCFunction_Type && |
Guido van Rossum | 721f62e | 2002-08-09 02:14:34 +0000 | [diff] [blame] | 5789 | PyCFunction_GET_FUNCTION(descr) == |
| 5790 | (PyCFunction)tp_new_wrapper && |
| 5791 | strcmp(p->name, "__new__") == 0) |
| 5792 | { |
| 5793 | /* The __new__ wrapper is not a wrapper descriptor, |
| 5794 | so must be special-cased differently. |
| 5795 | If we don't do this, creating an instance will |
| 5796 | always use slot_tp_new which will look up |
| 5797 | __new__ in the MRO which will call tp_new_wrapper |
| 5798 | which will look through the base classes looking |
| 5799 | for a static base and call its tp_new (usually |
| 5800 | PyType_GenericNew), after performing various |
| 5801 | sanity checks and constructing a new argument |
| 5802 | list. Cut all that nonsense short -- this speeds |
| 5803 | up instance creation tremendously. */ |
Martin v. Löwis | a94568a | 2003-05-10 07:36:56 +0000 | [diff] [blame] | 5804 | specific = (void *)type->tp_new; |
Guido van Rossum | 721f62e | 2002-08-09 02:14:34 +0000 | [diff] [blame] | 5805 | /* XXX I'm not 100% sure that there isn't a hole |
| 5806 | in this reasoning that requires additional |
| 5807 | sanity checks. I'll buy the first person to |
| 5808 | point out a bug in this reasoning a beer. */ |
| 5809 | } |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5810 | else { |
| 5811 | use_generic = 1; |
| 5812 | generic = p->function; |
| 5813 | } |
| 5814 | } while ((++p)->offset == offset); |
| 5815 | if (specific && !use_generic) |
| 5816 | *ptr = specific; |
| 5817 | else |
| 5818 | *ptr = generic; |
| 5819 | return p; |
| 5820 | } |
| 5821 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5822 | /* In the type, update the slots whose slotdefs are gathered in the pp array. |
| 5823 | This is a callback for update_subclasses(). */ |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5824 | static int |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5825 | update_slots_callback(PyTypeObject *type, void *data) |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5826 | { |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5827 | slotdef **pp = (slotdef **)data; |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5828 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5829 | for (; *pp; pp++) |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5830 | update_one_slot(type, *pp); |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5831 | return 0; |
| 5832 | } |
| 5833 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5834 | /* Comparison function for qsort() to compare slotdefs by their offset, and |
| 5835 | for equal offset by their address (to force a stable sort). */ |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5836 | static int |
| 5837 | slotdef_cmp(const void *aa, const void *bb) |
| 5838 | { |
| 5839 | const slotdef *a = (const slotdef *)aa, *b = (const slotdef *)bb; |
| 5840 | int c = a->offset - b->offset; |
| 5841 | if (c != 0) |
| 5842 | return c; |
| 5843 | else |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5844 | /* Cannot use a-b, as this gives off_t, |
| 5845 | which may lose precision when converted to int. */ |
| 5846 | return (a > b) ? 1 : (a < b) ? -1 : 0; |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5847 | } |
| 5848 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5849 | /* Initialize the slotdefs table by adding interned string objects for the |
| 5850 | names and sorting the entries. */ |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5851 | static void |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5852 | init_slotdefs(void) |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5853 | { |
| 5854 | slotdef *p; |
| 5855 | static int initialized = 0; |
| 5856 | |
| 5857 | if (initialized) |
| 5858 | return; |
| 5859 | for (p = slotdefs; p->name; p++) { |
| 5860 | p->name_strobj = PyString_InternFromString(p->name); |
| 5861 | if (!p->name_strobj) |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5862 | Py_FatalError("Out of memory interning slotdef names"); |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5863 | } |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5864 | qsort((void *)slotdefs, (size_t)(p-slotdefs), sizeof(slotdef), |
| 5865 | slotdef_cmp); |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5866 | initialized = 1; |
| 5867 | } |
| 5868 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5869 | /* Update the slots after assignment to a class (type) attribute. */ |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5870 | static int |
| 5871 | update_slot(PyTypeObject *type, PyObject *name) |
| 5872 | { |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5873 | slotdef *ptrs[MAX_EQUIV]; |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5874 | slotdef *p; |
| 5875 | slotdef **pp; |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5876 | int offset; |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5877 | |
Amaury Forgeot d'Arc | e4c270c | 2008-01-14 00:29:41 +0000 | [diff] [blame] | 5878 | /* Clear the VALID_VERSION flag of 'type' and all its |
| 5879 | subclasses. This could possibly be unified with the |
| 5880 | update_subclasses() recursion below, but carefully: |
| 5881 | they each have their own conditions on which to stop |
| 5882 | recursing into subclasses. */ |
| 5883 | type_modified(type); |
| 5884 | |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5885 | init_slotdefs(); |
| 5886 | pp = ptrs; |
| 5887 | for (p = slotdefs; p->name; p++) { |
| 5888 | /* XXX assume name is interned! */ |
| 5889 | if (p->name_strobj == name) |
| 5890 | *pp++ = p; |
| 5891 | } |
| 5892 | *pp = NULL; |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5893 | for (pp = ptrs; *pp; pp++) { |
| 5894 | p = *pp; |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5895 | offset = p->offset; |
| 5896 | while (p > slotdefs && (p-1)->offset == offset) |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5897 | --p; |
Guido van Rossum | b85a8b7 | 2001-10-16 17:00:48 +0000 | [diff] [blame] | 5898 | *pp = p; |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5899 | } |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5900 | if (ptrs[0] == NULL) |
| 5901 | return 0; /* Not an attribute that affects any slots */ |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5902 | return update_subclasses(type, name, |
| 5903 | update_slots_callback, (void *)ptrs); |
Guido van Rossum | 875eeaa | 2001-10-11 18:33:53 +0000 | [diff] [blame] | 5904 | } |
| 5905 | |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5906 | /* Store the proper functions in the slot dispatches at class (type) |
| 5907 | definition time, based upon which operations the class overrides in its |
| 5908 | dict. */ |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5909 | static void |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5910 | fixup_slot_dispatchers(PyTypeObject *type) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5911 | { |
Guido van Rossum | 7b9144b | 2001-10-09 19:39:46 +0000 | [diff] [blame] | 5912 | slotdef *p; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5913 | |
Guido van Rossum | d396b9c | 2001-10-13 20:02:41 +0000 | [diff] [blame] | 5914 | init_slotdefs(); |
Guido van Rossum | c334df5 | 2002-04-04 23:44:47 +0000 | [diff] [blame] | 5915 | for (p = slotdefs; p->name; ) |
| 5916 | p = update_one_slot(type, p); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 5917 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 5918 | |
Michael W. Hudson | 98bbc49 | 2002-11-26 14:47:27 +0000 | [diff] [blame] | 5919 | static void |
| 5920 | update_all_slots(PyTypeObject* type) |
| 5921 | { |
| 5922 | slotdef *p; |
| 5923 | |
| 5924 | init_slotdefs(); |
| 5925 | for (p = slotdefs; p->name; p++) { |
| 5926 | /* update_slot returns int but can't actually fail */ |
| 5927 | update_slot(type, p->name_strobj); |
| 5928 | } |
| 5929 | } |
| 5930 | |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5931 | /* recurse_down_subclasses() and update_subclasses() are mutually |
| 5932 | recursive functions to call a callback for all subclasses, |
| 5933 | but refraining from recursing into subclasses that define 'name'. */ |
| 5934 | |
| 5935 | static int |
| 5936 | update_subclasses(PyTypeObject *type, PyObject *name, |
| 5937 | update_callback callback, void *data) |
| 5938 | { |
| 5939 | if (callback(type, data) < 0) |
| 5940 | return -1; |
| 5941 | return recurse_down_subclasses(type, name, callback, data); |
| 5942 | } |
| 5943 | |
| 5944 | static int |
| 5945 | recurse_down_subclasses(PyTypeObject *type, PyObject *name, |
| 5946 | update_callback callback, void *data) |
| 5947 | { |
| 5948 | PyTypeObject *subclass; |
| 5949 | PyObject *ref, *subclasses, *dict; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 5950 | Py_ssize_t i, n; |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5951 | |
| 5952 | subclasses = type->tp_subclasses; |
| 5953 | if (subclasses == NULL) |
| 5954 | return 0; |
| 5955 | assert(PyList_Check(subclasses)); |
| 5956 | n = PyList_GET_SIZE(subclasses); |
| 5957 | for (i = 0; i < n; i++) { |
| 5958 | ref = PyList_GET_ITEM(subclasses, i); |
| 5959 | assert(PyWeakref_CheckRef(ref)); |
| 5960 | subclass = (PyTypeObject *)PyWeakref_GET_OBJECT(ref); |
| 5961 | assert(subclass != NULL); |
| 5962 | if ((PyObject *)subclass == Py_None) |
| 5963 | continue; |
| 5964 | assert(PyType_Check(subclass)); |
| 5965 | /* Avoid recursing down into unaffected classes */ |
| 5966 | dict = subclass->tp_dict; |
| 5967 | if (dict != NULL && PyDict_Check(dict) && |
| 5968 | PyDict_GetItem(dict, name) != NULL) |
| 5969 | continue; |
| 5970 | if (update_subclasses(subclass, name, callback, data) < 0) |
| 5971 | return -1; |
| 5972 | } |
| 5973 | return 0; |
| 5974 | } |
| 5975 | |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 5976 | /* This function is called by PyType_Ready() to populate the type's |
| 5977 | dictionary with method descriptors for function slots. For each |
Guido van Rossum | 09638c1 | 2002-06-13 19:17:46 +0000 | [diff] [blame] | 5978 | function slot (like tp_repr) that's defined in the type, one or more |
| 5979 | corresponding descriptors are added in the type's tp_dict dictionary |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5980 | under the appropriate name (like __repr__). Some function slots |
Guido van Rossum | 09638c1 | 2002-06-13 19:17:46 +0000 | [diff] [blame] | 5981 | cause more than one descriptor to be added (for example, the nb_add |
| 5982 | slot adds both __add__ and __radd__ descriptors) and some function |
| 5983 | slots compete for the same descriptor (for example both sq_item and |
| 5984 | mp_subscript generate a __getitem__ descriptor). |
| 5985 | |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 5986 | In the latter case, the first slotdef entry encoutered wins. Since |
Tim Peters | bf9b244 | 2003-03-23 05:35:36 +0000 | [diff] [blame] | 5987 | 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] | 5988 | PyHeapTypeObject, this gives us some control over disambiguating |
Guido van Rossum | 8d24ee9 | 2003-03-24 23:49:49 +0000 | [diff] [blame] | 5989 | between competing slots: the members of PyHeapTypeObject are listed |
| 5990 | from most general to least general, so the most general slot is |
| 5991 | preferred. In particular, because as_mapping comes before as_sequence, |
| 5992 | for a type that defines both mp_subscript and sq_item, mp_subscript |
| 5993 | wins. |
Guido van Rossum | 09638c1 | 2002-06-13 19:17:46 +0000 | [diff] [blame] | 5994 | |
| 5995 | This only adds new descriptors and doesn't overwrite entries in |
| 5996 | tp_dict that were previously defined. The descriptors contain a |
| 5997 | reference to the C function they must call, so that it's safe if they |
| 5998 | are copied into a subtype's __dict__ and the subtype has a different |
| 5999 | C function in its slot -- calling the method defined by the |
| 6000 | descriptor will call the C function that was used to create it, |
| 6001 | rather than the C function present in the slot when it is called. |
| 6002 | (This is important because a subtype may have a C function in the |
| 6003 | slot that calls the method from the dictionary, and we want to avoid |
| 6004 | infinite recursion here.) */ |
Guido van Rossum | 6d20407 | 2001-10-21 00:44:31 +0000 | [diff] [blame] | 6005 | |
| 6006 | static int |
| 6007 | add_operators(PyTypeObject *type) |
| 6008 | { |
| 6009 | PyObject *dict = type->tp_dict; |
| 6010 | slotdef *p; |
| 6011 | PyObject *descr; |
| 6012 | void **ptr; |
| 6013 | |
| 6014 | init_slotdefs(); |
| 6015 | for (p = slotdefs; p->name; p++) { |
| 6016 | if (p->wrapper == NULL) |
| 6017 | continue; |
| 6018 | ptr = slotptr(type, p->offset); |
| 6019 | if (!ptr || !*ptr) |
| 6020 | continue; |
| 6021 | if (PyDict_GetItem(dict, p->name_strobj)) |
| 6022 | continue; |
| 6023 | descr = PyDescr_NewWrapper(type, p, *ptr); |
| 6024 | if (descr == NULL) |
| 6025 | return -1; |
| 6026 | if (PyDict_SetItem(dict, p->name_strobj, descr) < 0) |
| 6027 | return -1; |
| 6028 | Py_DECREF(descr); |
| 6029 | } |
| 6030 | if (type->tp_new != NULL) { |
| 6031 | if (add_tp_new_wrapper(type) < 0) |
| 6032 | return -1; |
| 6033 | } |
| 6034 | return 0; |
| 6035 | } |
| 6036 | |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6037 | |
| 6038 | /* Cooperative 'super' */ |
| 6039 | |
| 6040 | typedef struct { |
| 6041 | PyObject_HEAD |
Guido van Rossum | e705ef1 | 2001-08-29 15:47:06 +0000 | [diff] [blame] | 6042 | PyTypeObject *type; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6043 | PyObject *obj; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6044 | PyTypeObject *obj_type; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6045 | } superobject; |
| 6046 | |
Guido van Rossum | 6f79937 | 2001-09-20 20:46:19 +0000 | [diff] [blame] | 6047 | static PyMemberDef super_members[] = { |
| 6048 | {"__thisclass__", T_OBJECT, offsetof(superobject, type), READONLY, |
| 6049 | "the class invoking super()"}, |
| 6050 | {"__self__", T_OBJECT, offsetof(superobject, obj), READONLY, |
| 6051 | "the instance invoking super(); may be None"}, |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6052 | {"__self_class__", T_OBJECT, offsetof(superobject, obj_type), READONLY, |
Walter Dörwald | f0dfc7a | 2003-10-20 14:01:56 +0000 | [diff] [blame] | 6053 | "the type of the instance invoking super(); may be None"}, |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6054 | {0} |
| 6055 | }; |
| 6056 | |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6057 | static void |
| 6058 | super_dealloc(PyObject *self) |
| 6059 | { |
| 6060 | superobject *su = (superobject *)self; |
| 6061 | |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 6062 | _PyObject_GC_UNTRACK(self); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6063 | Py_XDECREF(su->obj); |
| 6064 | Py_XDECREF(su->type); |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6065 | Py_XDECREF(su->obj_type); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 6066 | Py_TYPE(self)->tp_free(self); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6067 | } |
| 6068 | |
| 6069 | static PyObject * |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6070 | super_repr(PyObject *self) |
| 6071 | { |
| 6072 | superobject *su = (superobject *)self; |
| 6073 | |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6074 | if (su->obj_type) |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6075 | return PyString_FromFormat( |
Guido van Rossum | a4cb788 | 2001-09-25 03:56:29 +0000 | [diff] [blame] | 6076 | "<super: <class '%s'>, <%s object>>", |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6077 | su->type ? su->type->tp_name : "NULL", |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6078 | su->obj_type->tp_name); |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6079 | else |
| 6080 | return PyString_FromFormat( |
Guido van Rossum | a4cb788 | 2001-09-25 03:56:29 +0000 | [diff] [blame] | 6081 | "<super: <class '%s'>, NULL>", |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6082 | su->type ? su->type->tp_name : "NULL"); |
| 6083 | } |
| 6084 | |
| 6085 | static PyObject * |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6086 | super_getattro(PyObject *self, PyObject *name) |
| 6087 | { |
| 6088 | superobject *su = (superobject *)self; |
Guido van Rossum | 76ba09f | 2003-04-16 19:40:58 +0000 | [diff] [blame] | 6089 | int skip = su->obj_type == NULL; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6090 | |
Guido van Rossum | 76ba09f | 2003-04-16 19:40:58 +0000 | [diff] [blame] | 6091 | if (!skip) { |
| 6092 | /* We want __class__ to return the class of the super object |
| 6093 | (i.e. super, or a subclass), not the class of su->obj. */ |
| 6094 | skip = (PyString_Check(name) && |
| 6095 | PyString_GET_SIZE(name) == 9 && |
| 6096 | strcmp(PyString_AS_STRING(name), "__class__") == 0); |
| 6097 | } |
| 6098 | |
| 6099 | if (!skip) { |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 6100 | PyObject *mro, *res, *tmp, *dict; |
Guido van Rossum | 155db9a | 2002-04-02 17:53:47 +0000 | [diff] [blame] | 6101 | PyTypeObject *starttype; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6102 | descrgetfunc f; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 6103 | Py_ssize_t i, n; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6104 | |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6105 | starttype = su->obj_type; |
Guido van Rossum | 155db9a | 2002-04-02 17:53:47 +0000 | [diff] [blame] | 6106 | mro = starttype->tp_mro; |
| 6107 | |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6108 | if (mro == NULL) |
| 6109 | n = 0; |
| 6110 | else { |
| 6111 | assert(PyTuple_Check(mro)); |
| 6112 | n = PyTuple_GET_SIZE(mro); |
| 6113 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6114 | for (i = 0; i < n; i++) { |
Guido van Rossum | e705ef1 | 2001-08-29 15:47:06 +0000 | [diff] [blame] | 6115 | if ((PyObject *)(su->type) == PyTuple_GET_ITEM(mro, i)) |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6116 | break; |
| 6117 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6118 | i++; |
| 6119 | res = NULL; |
| 6120 | for (; i < n; i++) { |
| 6121 | tmp = PyTuple_GET_ITEM(mro, i); |
Tim Peters | a91e964 | 2001-11-14 23:32:33 +0000 | [diff] [blame] | 6122 | if (PyType_Check(tmp)) |
| 6123 | dict = ((PyTypeObject *)tmp)->tp_dict; |
| 6124 | else if (PyClass_Check(tmp)) |
| 6125 | dict = ((PyClassObject *)tmp)->cl_dict; |
| 6126 | else |
| 6127 | continue; |
| 6128 | res = PyDict_GetItem(dict, name); |
Guido van Rossum | 6cc5bb6 | 2003-04-16 20:01:36 +0000 | [diff] [blame] | 6129 | if (res != NULL) { |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6130 | Py_INCREF(res); |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 6131 | f = Py_TYPE(res)->tp_descr_get; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6132 | if (f != NULL) { |
Phillip J. Eby | 91a968a | 2004-03-25 02:19:34 +0000 | [diff] [blame] | 6133 | tmp = f(res, |
| 6134 | /* Only pass 'obj' param if |
| 6135 | this is instance-mode super |
| 6136 | (See SF ID #743627) |
| 6137 | */ |
Hye-Shik Chang | ff365c9 | 2004-03-25 16:37:03 +0000 | [diff] [blame] | 6138 | (su->obj == (PyObject *) |
| 6139 | su->obj_type |
Phillip J. Eby | 91a968a | 2004-03-25 02:19:34 +0000 | [diff] [blame] | 6140 | ? (PyObject *)NULL |
| 6141 | : su->obj), |
Guido van Rossum | d464107 | 2002-04-03 02:13:37 +0000 | [diff] [blame] | 6142 | (PyObject *)starttype); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6143 | Py_DECREF(res); |
| 6144 | res = tmp; |
| 6145 | } |
| 6146 | return res; |
| 6147 | } |
| 6148 | } |
| 6149 | } |
| 6150 | return PyObject_GenericGetAttr(self, name); |
| 6151 | } |
| 6152 | |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6153 | static PyTypeObject * |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6154 | supercheck(PyTypeObject *type, PyObject *obj) |
| 6155 | { |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6156 | /* Check that a super() call makes sense. Return a type object. |
| 6157 | |
| 6158 | obj can be a new-style class, or an instance of one: |
| 6159 | |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 6160 | - 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] | 6161 | used for class methods; the return value is obj. |
| 6162 | |
| 6163 | - If it is an instance, it must be an instance of 'type'. This is |
| 6164 | the normal case; the return value is obj.__class__. |
| 6165 | |
| 6166 | But... when obj is an instance, we want to allow for the case where |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 6167 | 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] | 6168 | This will allow using super() with a proxy for obj. |
| 6169 | */ |
| 6170 | |
Guido van Rossum | 8e80a72 | 2003-02-18 19:22:22 +0000 | [diff] [blame] | 6171 | /* Check for first bullet above (special case) */ |
| 6172 | if (PyType_Check(obj) && PyType_IsSubtype((PyTypeObject *)obj, type)) { |
| 6173 | Py_INCREF(obj); |
| 6174 | return (PyTypeObject *)obj; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6175 | } |
Guido van Rossum | 8e80a72 | 2003-02-18 19:22:22 +0000 | [diff] [blame] | 6176 | |
| 6177 | /* Normal case */ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 6178 | if (PyType_IsSubtype(Py_TYPE(obj), type)) { |
| 6179 | Py_INCREF(Py_TYPE(obj)); |
| 6180 | return Py_TYPE(obj); |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6181 | } |
| 6182 | else { |
| 6183 | /* Try the slow way */ |
| 6184 | static PyObject *class_str = NULL; |
| 6185 | PyObject *class_attr; |
| 6186 | |
| 6187 | if (class_str == NULL) { |
| 6188 | class_str = PyString_FromString("__class__"); |
| 6189 | if (class_str == NULL) |
| 6190 | return NULL; |
| 6191 | } |
| 6192 | |
| 6193 | class_attr = PyObject_GetAttr(obj, class_str); |
| 6194 | |
| 6195 | if (class_attr != NULL && |
| 6196 | PyType_Check(class_attr) && |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 6197 | (PyTypeObject *)class_attr != Py_TYPE(obj)) |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6198 | { |
| 6199 | int ok = PyType_IsSubtype( |
| 6200 | (PyTypeObject *)class_attr, type); |
| 6201 | if (ok) |
| 6202 | return (PyTypeObject *)class_attr; |
| 6203 | } |
| 6204 | |
| 6205 | if (class_attr == NULL) |
| 6206 | PyErr_Clear(); |
| 6207 | else |
| 6208 | Py_DECREF(class_attr); |
| 6209 | } |
| 6210 | |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 6211 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6212 | "super(type, obj): " |
| 6213 | "obj must be an instance or subtype of type"); |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6214 | return NULL; |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6215 | } |
| 6216 | |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6217 | static PyObject * |
| 6218 | super_descr_get(PyObject *self, PyObject *obj, PyObject *type) |
| 6219 | { |
| 6220 | superobject *su = (superobject *)self; |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 6221 | superobject *newobj; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6222 | |
| 6223 | if (obj == NULL || obj == Py_None || su->obj != NULL) { |
| 6224 | /* Not binding to an object, or already bound */ |
| 6225 | Py_INCREF(self); |
| 6226 | return self; |
| 6227 | } |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 6228 | if (Py_TYPE(su) != &PySuper_Type) |
Armin Rigo | 7726dc0 | 2005-05-15 15:32:08 +0000 | [diff] [blame] | 6229 | /* If su is an instance of a (strict) subclass of super, |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6230 | call its type */ |
Christian Heimes | e93237d | 2007-12-19 02:37:44 +0000 | [diff] [blame] | 6231 | return PyObject_CallFunctionObjArgs((PyObject *)Py_TYPE(su), |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 6232 | su->type, obj, NULL); |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6233 | else { |
| 6234 | /* Inline the common case */ |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6235 | PyTypeObject *obj_type = supercheck(su->type, obj); |
| 6236 | if (obj_type == NULL) |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6237 | return NULL; |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 6238 | newobj = (superobject *)PySuper_Type.tp_new(&PySuper_Type, |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6239 | NULL, NULL); |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 6240 | if (newobj == NULL) |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6241 | return NULL; |
| 6242 | Py_INCREF(su->type); |
| 6243 | Py_INCREF(obj); |
Anthony Baxter | a628621 | 2006-04-11 07:42:36 +0000 | [diff] [blame] | 6244 | newobj->type = su->type; |
| 6245 | newobj->obj = obj; |
| 6246 | newobj->obj_type = obj_type; |
| 6247 | return (PyObject *)newobj; |
Guido van Rossum | 5b443c6 | 2001-12-03 15:38:28 +0000 | [diff] [blame] | 6248 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6249 | } |
| 6250 | |
| 6251 | static int |
| 6252 | super_init(PyObject *self, PyObject *args, PyObject *kwds) |
| 6253 | { |
| 6254 | superobject *su = (superobject *)self; |
Guido van Rossum | e705ef1 | 2001-08-29 15:47:06 +0000 | [diff] [blame] | 6255 | PyTypeObject *type; |
| 6256 | PyObject *obj = NULL; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6257 | PyTypeObject *obj_type = NULL; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6258 | |
Georg Brandl | 5d59c09 | 2006-09-30 08:43:30 +0000 | [diff] [blame] | 6259 | if (!_PyArg_NoKeywords("super", kwds)) |
| 6260 | return -1; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6261 | if (!PyArg_ParseTuple(args, "O!|O:super", &PyType_Type, &type, &obj)) |
| 6262 | return -1; |
| 6263 | if (obj == Py_None) |
| 6264 | obj = NULL; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6265 | if (obj != NULL) { |
| 6266 | obj_type = supercheck(type, obj); |
| 6267 | if (obj_type == NULL) |
| 6268 | return -1; |
| 6269 | Py_INCREF(obj); |
| 6270 | } |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6271 | Py_INCREF(type); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6272 | su->type = type; |
| 6273 | su->obj = obj; |
Guido van Rossum | a89d10e | 2003-02-12 03:58:38 +0000 | [diff] [blame] | 6274 | su->obj_type = obj_type; |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6275 | return 0; |
| 6276 | } |
| 6277 | |
Martin v. Löwis | 14f8b4c | 2002-06-13 20:33:02 +0000 | [diff] [blame] | 6278 | PyDoc_STRVAR(super_doc, |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6279 | "super(type) -> unbound super object\n" |
| 6280 | "super(type, obj) -> bound super object; requires isinstance(obj, type)\n" |
Guido van Rossum | e705ef1 | 2001-08-29 15:47:06 +0000 | [diff] [blame] | 6281 | "super(type, type2) -> bound super object; requires issubclass(type2, type)\n" |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6282 | "Typical use to call a cooperative superclass method:\n" |
| 6283 | "class C(B):\n" |
| 6284 | " def meth(self, arg):\n" |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 6285 | " super(C, self).meth(arg)"); |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6286 | |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 6287 | static int |
| 6288 | super_traverse(PyObject *self, visitproc visit, void *arg) |
| 6289 | { |
| 6290 | superobject *su = (superobject *)self; |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 6291 | |
Thomas Wouters | c6e5506 | 2006-04-15 21:47:09 +0000 | [diff] [blame] | 6292 | Py_VISIT(su->obj); |
| 6293 | Py_VISIT(su->type); |
| 6294 | Py_VISIT(su->obj_type); |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 6295 | |
| 6296 | return 0; |
| 6297 | } |
| 6298 | |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6299 | PyTypeObject PySuper_Type = { |
Martin v. Löwis | 6819210 | 2007-07-21 06:55:02 +0000 | [diff] [blame] | 6300 | PyVarObject_HEAD_INIT(&PyType_Type, 0) |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6301 | "super", /* tp_name */ |
| 6302 | sizeof(superobject), /* tp_basicsize */ |
| 6303 | 0, /* tp_itemsize */ |
| 6304 | /* methods */ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 6305 | super_dealloc, /* tp_dealloc */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6306 | 0, /* tp_print */ |
| 6307 | 0, /* tp_getattr */ |
| 6308 | 0, /* tp_setattr */ |
| 6309 | 0, /* tp_compare */ |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6310 | super_repr, /* tp_repr */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6311 | 0, /* tp_as_number */ |
| 6312 | 0, /* tp_as_sequence */ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 6313 | 0, /* tp_as_mapping */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6314 | 0, /* tp_hash */ |
| 6315 | 0, /* tp_call */ |
| 6316 | 0, /* tp_str */ |
| 6317 | super_getattro, /* tp_getattro */ |
| 6318 | 0, /* tp_setattro */ |
| 6319 | 0, /* tp_as_buffer */ |
Guido van Rossum | 048eb75 | 2001-10-02 21:24:57 +0000 | [diff] [blame] | 6320 | Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | |
| 6321 | Py_TPFLAGS_BASETYPE, /* tp_flags */ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 6322 | super_doc, /* tp_doc */ |
| 6323 | super_traverse, /* tp_traverse */ |
| 6324 | 0, /* tp_clear */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6325 | 0, /* tp_richcompare */ |
| 6326 | 0, /* tp_weaklistoffset */ |
| 6327 | 0, /* tp_iter */ |
| 6328 | 0, /* tp_iternext */ |
| 6329 | 0, /* tp_methods */ |
Guido van Rossum | 41eb14d | 2001-08-30 23:13:11 +0000 | [diff] [blame] | 6330 | super_members, /* tp_members */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6331 | 0, /* tp_getset */ |
| 6332 | 0, /* tp_base */ |
| 6333 | 0, /* tp_dict */ |
| 6334 | super_descr_get, /* tp_descr_get */ |
| 6335 | 0, /* tp_descr_set */ |
| 6336 | 0, /* tp_dictoffset */ |
| 6337 | super_init, /* tp_init */ |
| 6338 | PyType_GenericAlloc, /* tp_alloc */ |
| 6339 | PyType_GenericNew, /* tp_new */ |
Jeremy Hylton | 2d1f5c9 | 2007-02-27 17:24:48 +0000 | [diff] [blame] | 6340 | PyObject_GC_Del, /* tp_free */ |
Guido van Rossum | 705f0f5 | 2001-08-24 16:47:00 +0000 | [diff] [blame] | 6341 | }; |