Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 2 | /* Generic object operations; and implementation of None (NoObject) */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 3 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 4 | #include "Python.h" |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 5 | #include "sliceobject.h" /* For PyEllipsis_Type */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 6 | |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 7 | #ifdef __cplusplus |
| 8 | extern "C" { |
| 9 | #endif |
| 10 | |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 11 | #ifdef Py_REF_DEBUG |
Neal Norwitz | 84632ee | 2006-03-04 20:00:59 +0000 | [diff] [blame] | 12 | Py_ssize_t _Py_RefTotal; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 13 | |
| 14 | Py_ssize_t |
| 15 | _Py_GetRefTotal(void) |
| 16 | { |
| 17 | PyObject *o; |
| 18 | Py_ssize_t total = _Py_RefTotal; |
| 19 | /* ignore the references to the dummy object of the dicts and sets |
| 20 | because they are not reliable and not useful (now that the |
| 21 | hash table code is well-tested) */ |
| 22 | o = _PyDict_Dummy(); |
| 23 | if (o != NULL) |
| 24 | total -= o->ob_refcnt; |
| 25 | o = _PySet_Dummy(); |
| 26 | if (o != NULL) |
| 27 | total -= o->ob_refcnt; |
| 28 | return total; |
| 29 | } |
| 30 | #endif /* Py_REF_DEBUG */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 31 | |
Mark Hammond | a290527 | 2002-07-29 13:42:14 +0000 | [diff] [blame] | 32 | int Py_DivisionWarningFlag; |
Guido van Rossum | 393661d | 2001-08-31 17:40:15 +0000 | [diff] [blame] | 33 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 34 | /* Object allocation routines used by NEWOBJ and NEWVAROBJ macros. |
| 35 | These are used by the individual routines for object creation. |
| 36 | Do not call them otherwise, they do not initialize the object! */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 37 | |
Tim Peters | 78be799 | 2003-03-23 02:51:01 +0000 | [diff] [blame] | 38 | #ifdef Py_TRACE_REFS |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 39 | /* Head of circular doubly-linked list of all objects. These are linked |
| 40 | * together via the _ob_prev and _ob_next members of a PyObject, which |
| 41 | * exist only in a Py_TRACE_REFS build. |
| 42 | */ |
Tim Peters | 78be799 | 2003-03-23 02:51:01 +0000 | [diff] [blame] | 43 | static PyObject refchain = {&refchain, &refchain}; |
Tim Peters | 36eb4df | 2003-03-23 03:33:13 +0000 | [diff] [blame] | 44 | |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 45 | /* Insert op at the front of the list of all objects. If force is true, |
| 46 | * op is added even if _ob_prev and _ob_next are non-NULL already. If |
| 47 | * force is false amd _ob_prev or _ob_next are non-NULL, do nothing. |
| 48 | * force should be true if and only if op points to freshly allocated, |
| 49 | * uninitialized memory, or you've unlinked op from the list and are |
Tim Peters | 51f8d38 | 2003-03-23 18:06:08 +0000 | [diff] [blame] | 50 | * relinking it into the front. |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 51 | * Note that objects are normally added to the list via _Py_NewReference, |
| 52 | * which is called by PyObject_Init. Not all objects are initialized that |
| 53 | * way, though; exceptions include statically allocated type objects, and |
| 54 | * statically allocated singletons (like Py_True and Py_None). |
| 55 | */ |
Tim Peters | 36eb4df | 2003-03-23 03:33:13 +0000 | [diff] [blame] | 56 | void |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 57 | _Py_AddToAllObjects(PyObject *op, int force) |
Tim Peters | 36eb4df | 2003-03-23 03:33:13 +0000 | [diff] [blame] | 58 | { |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 59 | #ifdef Py_DEBUG |
| 60 | if (!force) { |
| 61 | /* If it's initialized memory, op must be in or out of |
| 62 | * the list unambiguously. |
| 63 | */ |
| 64 | assert((op->_ob_prev == NULL) == (op->_ob_next == NULL)); |
| 65 | } |
Tim Peters | 78be799 | 2003-03-23 02:51:01 +0000 | [diff] [blame] | 66 | #endif |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 67 | if (force || op->_ob_prev == NULL) { |
| 68 | op->_ob_next = refchain._ob_next; |
| 69 | op->_ob_prev = &refchain; |
| 70 | refchain._ob_next->_ob_prev = op; |
| 71 | refchain._ob_next = op; |
| 72 | } |
| 73 | } |
| 74 | #endif /* Py_TRACE_REFS */ |
Tim Peters | 78be799 | 2003-03-23 02:51:01 +0000 | [diff] [blame] | 75 | |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 76 | #ifdef COUNT_ALLOCS |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 77 | static PyTypeObject *type_list; |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 78 | /* All types are added to type_list, at least when |
| 79 | they get one object created. That makes them |
| 80 | immortal, which unfortunately contributes to |
| 81 | garbage itself. If unlist_types_without_objects |
| 82 | is set, they will be removed from the type_list |
| 83 | once the last object is deallocated. */ |
| 84 | int unlist_types_without_objects; |
Sjoerd Mullender | 842d2cc | 1993-10-15 16:18:48 +0000 | [diff] [blame] | 85 | extern int tuple_zero_allocs, fast_tuple_allocs; |
| 86 | extern int quick_int_allocs, quick_neg_int_allocs; |
Sjoerd Mullender | 3bb8a05 | 1993-10-22 12:04:32 +0000 | [diff] [blame] | 87 | extern int null_strings, one_strings; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 88 | void |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 89 | dump_counts(FILE* f) |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 90 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 91 | PyTypeObject *tp; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 92 | |
| 93 | for (tp = type_list; tp; tp = tp->tp_next) |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 94 | fprintf(f, "%s alloc'd: %d, freed: %d, max in use: %d\n", |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 95 | tp->tp_name, tp->tp_allocs, tp->tp_frees, |
Sjoerd Mullender | 52c1f51 | 1993-10-25 08:40:52 +0000 | [diff] [blame] | 96 | tp->tp_maxalloc); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 97 | fprintf(f, "fast tuple allocs: %d, empty: %d\n", |
Sjoerd Mullender | 52c1f51 | 1993-10-25 08:40:52 +0000 | [diff] [blame] | 98 | fast_tuple_allocs, tuple_zero_allocs); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 99 | fprintf(f, "fast int allocs: pos: %d, neg: %d\n", |
Sjoerd Mullender | 52c1f51 | 1993-10-25 08:40:52 +0000 | [diff] [blame] | 100 | quick_int_allocs, quick_neg_int_allocs); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 101 | fprintf(f, "null strings: %d, 1-strings: %d\n", |
Sjoerd Mullender | 52c1f51 | 1993-10-25 08:40:52 +0000 | [diff] [blame] | 102 | null_strings, one_strings); |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 103 | } |
| 104 | |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 105 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 106 | get_counts(void) |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 107 | { |
| 108 | PyTypeObject *tp; |
| 109 | PyObject *result; |
| 110 | PyObject *v; |
| 111 | |
| 112 | result = PyList_New(0); |
| 113 | if (result == NULL) |
| 114 | return NULL; |
| 115 | for (tp = type_list; tp; tp = tp->tp_next) { |
Thomas Wouters | 4d70c3d | 2006-06-08 14:42:34 +0000 | [diff] [blame] | 116 | v = Py_BuildValue("(snnn)", tp->tp_name, tp->tp_allocs, |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 117 | tp->tp_frees, tp->tp_maxalloc); |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 118 | if (v == NULL) { |
| 119 | Py_DECREF(result); |
| 120 | return NULL; |
| 121 | } |
| 122 | if (PyList_Append(result, v) < 0) { |
| 123 | Py_DECREF(v); |
| 124 | Py_DECREF(result); |
| 125 | return NULL; |
| 126 | } |
| 127 | Py_DECREF(v); |
| 128 | } |
| 129 | return result; |
| 130 | } |
| 131 | |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 132 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 133 | inc_count(PyTypeObject *tp) |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 134 | { |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 135 | if (tp->tp_next == NULL && tp->tp_prev == NULL) { |
Guido van Rossum | d8953cb | 1995-04-06 14:46:26 +0000 | [diff] [blame] | 136 | /* first time; insert in linked list */ |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 137 | if (tp->tp_next != NULL) /* sanity check */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 138 | Py_FatalError("XXX inc_count sanity check"); |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 139 | if (type_list) |
| 140 | type_list->tp_prev = tp; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 141 | tp->tp_next = type_list; |
Tim Peters | c6a3ff6 | 2002-07-08 22:11:52 +0000 | [diff] [blame] | 142 | /* Note that as of Python 2.2, heap-allocated type objects |
| 143 | * can go away, but this code requires that they stay alive |
| 144 | * until program exit. That's why we're careful with |
| 145 | * refcounts here. type_list gets a new reference to tp, |
| 146 | * while ownership of the reference type_list used to hold |
| 147 | * (if any) was transferred to tp->tp_next in the line above. |
| 148 | * tp is thus effectively immortal after this. |
| 149 | */ |
| 150 | Py_INCREF(tp); |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 151 | type_list = tp; |
Tim Peters | 3e40c7f | 2003-03-23 03:04:32 +0000 | [diff] [blame] | 152 | #ifdef Py_TRACE_REFS |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 153 | /* Also insert in the doubly-linked list of all objects, |
| 154 | * if not already there. |
| 155 | */ |
| 156 | _Py_AddToAllObjects((PyObject *)tp, 0); |
Tim Peters | 78be799 | 2003-03-23 02:51:01 +0000 | [diff] [blame] | 157 | #endif |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 158 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 159 | tp->tp_allocs++; |
| 160 | if (tp->tp_allocs - tp->tp_frees > tp->tp_maxalloc) |
| 161 | tp->tp_maxalloc = tp->tp_allocs - tp->tp_frees; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 162 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 163 | |
| 164 | void dec_count(PyTypeObject *tp) |
| 165 | { |
| 166 | tp->tp_frees++; |
| 167 | if (unlist_types_without_objects && |
| 168 | tp->tp_allocs == tp->tp_frees) { |
| 169 | /* unlink the type from type_list */ |
| 170 | if (tp->tp_prev) |
| 171 | tp->tp_prev->tp_next = tp->tp_next; |
| 172 | else |
| 173 | type_list = tp->tp_next; |
| 174 | if (tp->tp_next) |
| 175 | tp->tp_next->tp_prev = tp->tp_prev; |
| 176 | tp->tp_next = tp->tp_prev = NULL; |
| 177 | Py_DECREF(tp); |
| 178 | } |
| 179 | } |
| 180 | |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 181 | #endif |
| 182 | |
Tim Peters | 7c321a8 | 2002-07-09 02:57:01 +0000 | [diff] [blame] | 183 | #ifdef Py_REF_DEBUG |
| 184 | /* Log a fatal error; doesn't return. */ |
| 185 | void |
| 186 | _Py_NegativeRefcount(const char *fname, int lineno, PyObject *op) |
| 187 | { |
| 188 | char buf[300]; |
| 189 | |
| 190 | PyOS_snprintf(buf, sizeof(buf), |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 191 | "%s:%i object at %p has negative ref count " |
| 192 | "%" PY_FORMAT_SIZE_T "d", |
| 193 | fname, lineno, op, op->ob_refcnt); |
Tim Peters | 7c321a8 | 2002-07-09 02:57:01 +0000 | [diff] [blame] | 194 | Py_FatalError(buf); |
| 195 | } |
| 196 | |
| 197 | #endif /* Py_REF_DEBUG */ |
| 198 | |
Thomas Heller | 1328b52 | 2004-04-22 17:23:49 +0000 | [diff] [blame] | 199 | void |
| 200 | Py_IncRef(PyObject *o) |
| 201 | { |
| 202 | Py_XINCREF(o); |
| 203 | } |
| 204 | |
| 205 | void |
| 206 | Py_DecRef(PyObject *o) |
| 207 | { |
| 208 | Py_XDECREF(o); |
| 209 | } |
| 210 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 211 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 212 | PyObject_Init(PyObject *op, PyTypeObject *tp) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 213 | { |
Guido van Rossum | 6e08c14 | 2002-10-11 20:37:24 +0000 | [diff] [blame] | 214 | if (op == NULL) |
| 215 | return PyErr_NoMemory(); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 216 | /* Any changes should be reflected in PyObject_INIT (objimpl.h) */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 217 | op->ob_type = tp; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 218 | _Py_NewReference(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 219 | return op; |
| 220 | } |
| 221 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 222 | PyVarObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 223 | PyObject_InitVar(PyVarObject *op, PyTypeObject *tp, Py_ssize_t size) |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 224 | { |
Guido van Rossum | 6e08c14 | 2002-10-11 20:37:24 +0000 | [diff] [blame] | 225 | if (op == NULL) |
| 226 | return (PyVarObject *) PyErr_NoMemory(); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 227 | /* Any changes should be reflected in PyObject_INIT_VAR */ |
| 228 | op->ob_size = size; |
| 229 | op->ob_type = tp; |
| 230 | _Py_NewReference((PyObject *)op); |
| 231 | return op; |
| 232 | } |
| 233 | |
| 234 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 235 | _PyObject_New(PyTypeObject *tp) |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 236 | { |
| 237 | PyObject *op; |
| 238 | op = (PyObject *) PyObject_MALLOC(_PyObject_SIZE(tp)); |
| 239 | if (op == NULL) |
| 240 | return PyErr_NoMemory(); |
| 241 | return PyObject_INIT(op, tp); |
| 242 | } |
| 243 | |
Guido van Rossum | d0c87ee | 1997-05-15 21:31:03 +0000 | [diff] [blame] | 244 | PyVarObject * |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 245 | _PyObject_NewVar(PyTypeObject *tp, Py_ssize_t nitems) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 246 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 247 | PyVarObject *op; |
Tim Peters | f2a67da | 2001-10-07 03:54:51 +0000 | [diff] [blame] | 248 | const size_t size = _PyObject_VAR_SIZE(tp, nitems); |
Tim Peters | 6d483d3 | 2001-10-06 21:27:34 +0000 | [diff] [blame] | 249 | op = (PyVarObject *) PyObject_MALLOC(size); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 250 | if (op == NULL) |
Guido van Rossum | d0c87ee | 1997-05-15 21:31:03 +0000 | [diff] [blame] | 251 | return (PyVarObject *)PyErr_NoMemory(); |
Tim Peters | 6d483d3 | 2001-10-06 21:27:34 +0000 | [diff] [blame] | 252 | return PyObject_INIT_VAR(op, tp, nitems); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 253 | } |
| 254 | |
Neal Norwitz | 1a99750 | 2003-01-13 20:13:12 +0000 | [diff] [blame] | 255 | /* Implementation of PyObject_Print with recursion checking */ |
| 256 | static int |
| 257 | internal_print(PyObject *op, FILE *fp, int flags, int nesting) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 258 | { |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 259 | int ret = 0; |
Neal Norwitz | 1a99750 | 2003-01-13 20:13:12 +0000 | [diff] [blame] | 260 | if (nesting > 10) { |
| 261 | PyErr_SetString(PyExc_RuntimeError, "print recursion"); |
| 262 | return -1; |
| 263 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 264 | if (PyErr_CheckSignals()) |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 265 | return -1; |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 266 | #ifdef USE_STACKCHECK |
| 267 | if (PyOS_CheckStack()) { |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 268 | PyErr_SetString(PyExc_MemoryError, "stack overflow"); |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 269 | return -1; |
| 270 | } |
| 271 | #endif |
Guido van Rossum | 687ef6e | 2000-01-12 16:28:58 +0000 | [diff] [blame] | 272 | clearerr(fp); /* Clear any previous error condition */ |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 273 | if (op == NULL) { |
| 274 | fprintf(fp, "<nil>"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 275 | } |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 276 | else { |
| 277 | if (op->ob_refcnt <= 0) |
Thomas Wouters | 8b87a0b | 2006-03-01 05:41:20 +0000 | [diff] [blame] | 278 | /* XXX(twouters) cast refcount to long until %zd is |
| 279 | universally available */ |
| 280 | fprintf(fp, "<refcnt %ld at %p>", |
| 281 | (long)op->ob_refcnt, op); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 282 | else if (op->ob_type->tp_print == NULL) { |
Guido van Rossum | 4f288ab | 2001-05-01 16:53:37 +0000 | [diff] [blame] | 283 | PyObject *s; |
| 284 | if (flags & Py_PRINT_RAW) |
| 285 | s = PyObject_Str(op); |
| 286 | else |
| 287 | s = PyObject_Repr(op); |
| 288 | if (s == NULL) |
| 289 | ret = -1; |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 290 | else { |
Neal Norwitz | 1a99750 | 2003-01-13 20:13:12 +0000 | [diff] [blame] | 291 | ret = internal_print(s, fp, Py_PRINT_RAW, |
| 292 | nesting+1); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 293 | } |
Guido van Rossum | 4f288ab | 2001-05-01 16:53:37 +0000 | [diff] [blame] | 294 | Py_XDECREF(s); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 295 | } |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 296 | else |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 297 | ret = (*op->ob_type->tp_print)(op, fp, flags); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 298 | } |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 299 | if (ret == 0) { |
| 300 | if (ferror(fp)) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 301 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 302 | clearerr(fp); |
| 303 | ret = -1; |
| 304 | } |
| 305 | } |
| 306 | return ret; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 307 | } |
| 308 | |
Neal Norwitz | 1a99750 | 2003-01-13 20:13:12 +0000 | [diff] [blame] | 309 | int |
| 310 | PyObject_Print(PyObject *op, FILE *fp, int flags) |
| 311 | { |
| 312 | return internal_print(op, fp, flags, 0); |
| 313 | } |
| 314 | |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 315 | /* For debugging convenience. Set a breakpoint here and call it from your DLL */ |
| 316 | void |
Thomas Wouters | b213704 | 2007-02-01 18:02:27 +0000 | [diff] [blame] | 317 | _Py_BreakPoint(void) |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 318 | { |
| 319 | } |
| 320 | |
Neal Norwitz | 1a99750 | 2003-01-13 20:13:12 +0000 | [diff] [blame] | 321 | |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 322 | /* For debugging convenience. See Misc/gdbinit for some useful gdb hooks */ |
Guido van Rossum | 3893815 | 2006-08-21 23:36:26 +0000 | [diff] [blame] | 323 | void |
| 324 | _PyObject_Dump(PyObject* op) |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 325 | { |
Barry Warsaw | eefb107 | 2001-02-22 22:39:18 +0000 | [diff] [blame] | 326 | if (op == NULL) |
| 327 | fprintf(stderr, "NULL\n"); |
| 328 | else { |
Guido van Rossum | 5f5512d | 2001-09-14 15:50:08 +0000 | [diff] [blame] | 329 | fprintf(stderr, "object : "); |
Barry Warsaw | eefb107 | 2001-02-22 22:39:18 +0000 | [diff] [blame] | 330 | (void)PyObject_Print(op, stderr, 0); |
Thomas Wouters | 8b87a0b | 2006-03-01 05:41:20 +0000 | [diff] [blame] | 331 | /* XXX(twouters) cast refcount to long until %zd is |
| 332 | universally available */ |
Guido van Rossum | 5f5512d | 2001-09-14 15:50:08 +0000 | [diff] [blame] | 333 | fprintf(stderr, "\n" |
| 334 | "type : %s\n" |
Thomas Wouters | 8b87a0b | 2006-03-01 05:41:20 +0000 | [diff] [blame] | 335 | "refcount: %ld\n" |
Guido van Rossum | 5f5512d | 2001-09-14 15:50:08 +0000 | [diff] [blame] | 336 | "address : %p\n", |
| 337 | op->ob_type==NULL ? "NULL" : op->ob_type->tp_name, |
Thomas Wouters | 8b87a0b | 2006-03-01 05:41:20 +0000 | [diff] [blame] | 338 | (long)op->ob_refcnt, |
Guido van Rossum | 5f5512d | 2001-09-14 15:50:08 +0000 | [diff] [blame] | 339 | op); |
Barry Warsaw | eefb107 | 2001-02-22 22:39:18 +0000 | [diff] [blame] | 340 | } |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 341 | } |
Barry Warsaw | 903138f | 2001-01-23 16:33:18 +0000 | [diff] [blame] | 342 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 343 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 344 | PyObject_Repr(PyObject *v) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 345 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 346 | if (PyErr_CheckSignals()) |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 347 | return NULL; |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 348 | #ifdef USE_STACKCHECK |
| 349 | if (PyOS_CheckStack()) { |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 350 | PyErr_SetString(PyExc_MemoryError, "stack overflow"); |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 351 | return NULL; |
| 352 | } |
| 353 | #endif |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 354 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 355 | return PyString_FromString("<NULL>"); |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 356 | else if (v->ob_type->tp_repr == NULL) |
Guido van Rossum | 21922aa | 2001-08-30 20:26:05 +0000 | [diff] [blame] | 357 | return PyString_FromFormat("<%s object at %p>", |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 358 | v->ob_type->tp_name, v); |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 359 | else { |
| 360 | PyObject *res; |
| 361 | res = (*v->ob_type->tp_repr)(v); |
| 362 | if (res == NULL) |
| 363 | return NULL; |
Guido van Rossum | c8c8233 | 2007-05-04 05:14:29 +0000 | [diff] [blame] | 364 | if (PyUnicode_Check(res)) |
| 365 | return res; |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 366 | if (!PyString_Check(res)) { |
| 367 | PyErr_Format(PyExc_TypeError, |
Guido van Rossum | 5db862d | 2000-04-10 12:46:51 +0000 | [diff] [blame] | 368 | "__repr__ returned non-string (type %.200s)", |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 369 | res->ob_type->tp_name); |
| 370 | Py_DECREF(res); |
| 371 | return NULL; |
| 372 | } |
| 373 | return res; |
| 374 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 375 | } |
| 376 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 377 | PyObject * |
Neil Schemenauer | cf52c07 | 2005-08-12 17:34:58 +0000 | [diff] [blame] | 378 | _PyObject_Str(PyObject *v) |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 379 | { |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 380 | PyObject *res; |
Neil Schemenauer | cf52c07 | 2005-08-12 17:34:58 +0000 | [diff] [blame] | 381 | int type_ok; |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 382 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 383 | return PyString_FromString("<NULL>"); |
Tim Peters | 5a49ade | 2001-09-11 01:41:59 +0000 | [diff] [blame] | 384 | if (PyString_CheckExact(v)) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 385 | Py_INCREF(v); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 386 | return v; |
| 387 | } |
Neil Schemenauer | cf52c07 | 2005-08-12 17:34:58 +0000 | [diff] [blame] | 388 | if (PyUnicode_CheckExact(v)) { |
| 389 | Py_INCREF(v); |
| 390 | return v; |
| 391 | } |
Guido van Rossum | 4f288ab | 2001-05-01 16:53:37 +0000 | [diff] [blame] | 392 | if (v->ob_type->tp_str == NULL) |
| 393 | return PyObject_Repr(v); |
| 394 | |
| 395 | res = (*v->ob_type->tp_str)(v); |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 396 | if (res == NULL) |
| 397 | return NULL; |
Neil Schemenauer | cf52c07 | 2005-08-12 17:34:58 +0000 | [diff] [blame] | 398 | type_ok = PyString_Check(res); |
Neil Schemenauer | cf52c07 | 2005-08-12 17:34:58 +0000 | [diff] [blame] | 399 | type_ok = type_ok || PyUnicode_Check(res); |
Neil Schemenauer | cf52c07 | 2005-08-12 17:34:58 +0000 | [diff] [blame] | 400 | if (!type_ok) { |
| 401 | PyErr_Format(PyExc_TypeError, |
| 402 | "__str__ returned non-string (type %.200s)", |
| 403 | res->ob_type->tp_name); |
| 404 | Py_DECREF(res); |
| 405 | return NULL; |
| 406 | } |
| 407 | return res; |
| 408 | } |
| 409 | |
| 410 | PyObject * |
| 411 | PyObject_Str(PyObject *v) |
| 412 | { |
| 413 | PyObject *res = _PyObject_Str(v); |
| 414 | if (res == NULL) |
| 415 | return NULL; |
Marc-André Lemburg | 891bc65 | 2000-07-03 09:57:53 +0000 | [diff] [blame] | 416 | if (PyUnicode_Check(res)) { |
| 417 | PyObject* str; |
Guido van Rossum | f15a29f | 2007-05-04 00:41:39 +0000 | [diff] [blame] | 418 | str = _PyUnicode_AsDefaultEncodedString(res, NULL); |
| 419 | Py_XINCREF(str); |
Marc-André Lemburg | 891bc65 | 2000-07-03 09:57:53 +0000 | [diff] [blame] | 420 | Py_DECREF(res); |
| 421 | if (str) |
| 422 | res = str; |
| 423 | else |
| 424 | return NULL; |
| 425 | } |
Neil Schemenauer | cf52c07 | 2005-08-12 17:34:58 +0000 | [diff] [blame] | 426 | assert(PyString_Check(res)); |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 427 | return res; |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 428 | } |
| 429 | |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 430 | PyObject * |
| 431 | PyObject_Unicode(PyObject *v) |
| 432 | { |
| 433 | PyObject *res; |
Brett Cannon | c3647ac | 2005-04-26 03:45:26 +0000 | [diff] [blame] | 434 | PyObject *func; |
Neal Norwitz | 7580146 | 2006-03-14 06:02:16 +0000 | [diff] [blame] | 435 | PyObject *str; |
Brett Cannon | c3647ac | 2005-04-26 03:45:26 +0000 | [diff] [blame] | 436 | static PyObject *unicodestr; |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 437 | |
Georg Brandl | 3daf758 | 2006-03-13 22:22:11 +0000 | [diff] [blame] | 438 | if (v == NULL) { |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 439 | res = PyString_FromString("<NULL>"); |
Neal Norwitz | 7580146 | 2006-03-14 06:02:16 +0000 | [diff] [blame] | 440 | if (res == NULL) |
| 441 | return NULL; |
| 442 | str = PyUnicode_FromEncodedObject(res, NULL, "strict"); |
| 443 | Py_DECREF(res); |
| 444 | return str; |
Georg Brandl | 3daf758 | 2006-03-13 22:22:11 +0000 | [diff] [blame] | 445 | } else if (PyUnicode_CheckExact(v)) { |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 446 | Py_INCREF(v); |
| 447 | return v; |
| 448 | } |
Brett Cannon | c3647ac | 2005-04-26 03:45:26 +0000 | [diff] [blame] | 449 | /* XXX As soon as we have a tp_unicode slot, we should |
| 450 | check this before trying the __unicode__ |
| 451 | method. */ |
| 452 | if (unicodestr == NULL) { |
| 453 | unicodestr= PyString_InternFromString("__unicode__"); |
| 454 | if (unicodestr == NULL) |
| 455 | return NULL; |
Guido van Rossum | b8c65bc | 2001-10-19 02:01:31 +0000 | [diff] [blame] | 456 | } |
Brett Cannon | c3647ac | 2005-04-26 03:45:26 +0000 | [diff] [blame] | 457 | func = PyObject_GetAttr(v, unicodestr); |
| 458 | if (func != NULL) { |
| 459 | res = PyEval_CallObject(func, (PyObject *)NULL); |
| 460 | Py_DECREF(func); |
| 461 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 462 | else { |
Brett Cannon | c3647ac | 2005-04-26 03:45:26 +0000 | [diff] [blame] | 463 | PyErr_Clear(); |
| 464 | if (PyUnicode_Check(v)) { |
| 465 | /* For a Unicode subtype that's didn't overwrite __unicode__, |
| 466 | return a true Unicode object with the same data. */ |
| 467 | return PyUnicode_FromUnicode(PyUnicode_AS_UNICODE(v), |
| 468 | PyUnicode_GET_SIZE(v)); |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 469 | } |
Brett Cannon | c3647ac | 2005-04-26 03:45:26 +0000 | [diff] [blame] | 470 | if (PyString_CheckExact(v)) { |
| 471 | Py_INCREF(v); |
| 472 | res = v; |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 473 | } |
Guido van Rossum | b8c65bc | 2001-10-19 02:01:31 +0000 | [diff] [blame] | 474 | else { |
Guido van Rossum | b8c65bc | 2001-10-19 02:01:31 +0000 | [diff] [blame] | 475 | if (v->ob_type->tp_str != NULL) |
| 476 | res = (*v->ob_type->tp_str)(v); |
| 477 | else |
| 478 | res = PyObject_Repr(v); |
| 479 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 480 | } |
| 481 | if (res == NULL) |
| 482 | return NULL; |
| 483 | if (!PyUnicode_Check(res)) { |
Guido van Rossum | b8c65bc | 2001-10-19 02:01:31 +0000 | [diff] [blame] | 484 | str = PyUnicode_FromEncodedObject(res, NULL, "strict"); |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 485 | Py_DECREF(res); |
Neal Norwitz | 7580146 | 2006-03-14 06:02:16 +0000 | [diff] [blame] | 486 | res = str; |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 487 | } |
| 488 | return res; |
| 489 | } |
| 490 | |
| 491 | |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 492 | /* The new comparison philosophy is: we completely separate three-way |
| 493 | comparison from rich comparison. That is, PyObject_Compare() and |
| 494 | PyObject_Cmp() *just* use the tp_compare slot. And PyObject_RichCompare() |
| 495 | and PyObject_RichCompareBool() *just* use the tp_richcompare slot. |
| 496 | |
| 497 | See (*) below for practical amendments. |
| 498 | |
| 499 | IOW, only cmp() uses tp_compare; the comparison operators (==, !=, <=, <, |
| 500 | >=, >) only use tp_richcompare. Note that list.sort() only uses <. |
| 501 | |
| 502 | (And yes, eventually we'll rip out cmp() and tp_compare.) |
| 503 | |
| 504 | The calling conventions are different: tp_compare only gets called with two |
| 505 | objects of the appropriate type; tp_richcompare gets called with a first |
| 506 | argument of the appropriate type and a second object of an arbitrary type. |
| 507 | We never do any kind of coercion. |
| 508 | |
| 509 | The return conventions are also different. |
| 510 | |
| 511 | The tp_compare slot should return a C int, as follows: |
| 512 | |
| 513 | -1 if a < b or if an exception occurred |
| 514 | 0 if a == b |
| 515 | +1 if a > b |
| 516 | |
| 517 | No other return values are allowed. PyObject_Compare() has the same |
| 518 | calling convention. |
| 519 | |
| 520 | The tp_richcompare slot should return an object, as follows: |
| 521 | |
| 522 | NULL if an exception occurred |
| 523 | NotImplemented if the requested comparison is not implemented |
| 524 | any other false value if the requested comparison is false |
| 525 | any other true value if the requested comparison is true |
| 526 | |
| 527 | The PyObject_RichCompare[Bool]() wrappers raise TypeError when they get |
| 528 | NotImplemented. |
| 529 | |
| 530 | (*) Practical amendments: |
| 531 | |
| 532 | - If rich comparison returns NotImplemented, == and != are decided by |
| 533 | comparing the object pointer (i.e. falling back to the base object |
| 534 | implementation). |
| 535 | |
| 536 | - If three-way comparison is not implemented, it falls back on rich |
| 537 | comparison (but not the other way around!). |
| 538 | |
Guido van Rossum | a407300 | 2002-05-31 20:03:54 +0000 | [diff] [blame] | 539 | */ |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 540 | |
| 541 | /* Forward */ |
| 542 | static PyObject *do_richcompare(PyObject *v, PyObject *w, int op); |
| 543 | |
| 544 | /* Perform a three-way comparison, raising TypeError if three-way comparison |
| 545 | is not supported. */ |
Guido van Rossum | a407300 | 2002-05-31 20:03:54 +0000 | [diff] [blame] | 546 | static int |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 547 | do_compare(PyObject *v, PyObject *w) |
Guido van Rossum | a407300 | 2002-05-31 20:03:54 +0000 | [diff] [blame] | 548 | { |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 549 | cmpfunc f; |
| 550 | int ok; |
| 551 | |
| 552 | if (v->ob_type == w->ob_type && |
| 553 | (f = v->ob_type->tp_compare) != NULL) { |
| 554 | return (*f)(v, w); |
Guido van Rossum | a407300 | 2002-05-31 20:03:54 +0000 | [diff] [blame] | 555 | } |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 556 | |
| 557 | /* Now try three-way compare before giving up. This is intentionally |
| 558 | elaborate; if you have a it will raise TypeError if it detects two |
| 559 | objects that aren't ordered with respect to each other. */ |
| 560 | ok = PyObject_RichCompareBool(v, w, Py_LT); |
| 561 | if (ok < 0) |
| 562 | return -1; /* Error */ |
| 563 | if (ok) |
| 564 | return -1; /* Less than */ |
| 565 | ok = PyObject_RichCompareBool(v, w, Py_GT); |
| 566 | if (ok < 0) |
| 567 | return -1; /* Error */ |
| 568 | if (ok) |
| 569 | return 1; /* Greater than */ |
| 570 | ok = PyObject_RichCompareBool(v, w, Py_EQ); |
| 571 | if (ok < 0) |
| 572 | return -1; /* Error */ |
| 573 | if (ok) |
| 574 | return 0; /* Equal */ |
| 575 | |
| 576 | /* Give up */ |
| 577 | PyErr_Format(PyExc_TypeError, |
Neal Norwitz | 3bd844e | 2006-08-29 04:39:12 +0000 | [diff] [blame] | 578 | "unorderable types: '%.100s' != '%.100s'", |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 579 | v->ob_type->tp_name, |
| 580 | w->ob_type->tp_name); |
| 581 | return -1; |
Guido van Rossum | a407300 | 2002-05-31 20:03:54 +0000 | [diff] [blame] | 582 | } |
| 583 | |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 584 | /* Perform a three-way comparison. This wraps do_compare() with a check for |
| 585 | NULL arguments and a recursion check. */ |
| 586 | int |
| 587 | PyObject_Compare(PyObject *v, PyObject *w) |
| 588 | { |
| 589 | int res; |
Guido van Rossum | a407300 | 2002-05-31 20:03:54 +0000 | [diff] [blame] | 590 | |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 591 | if (v == NULL || w == NULL) { |
| 592 | if (!PyErr_Occurred()) |
| 593 | PyErr_BadInternalCall(); |
| 594 | return -1; |
| 595 | } |
| 596 | if (Py_EnterRecursiveCall(" in cmp")) |
| 597 | return -1; |
| 598 | res = do_compare(v, w); |
| 599 | Py_LeaveRecursiveCall(); |
| 600 | return res < 0 ? -1 : res; |
| 601 | } |
Guido van Rossum | d1f06b9 | 2001-01-24 22:14:43 +0000 | [diff] [blame] | 602 | |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 603 | /* Map rich comparison operators to their swapped version, e.g. LT <--> GT */ |
Brett Cannon | a5ca2e7 | 2004-09-25 01:37:24 +0000 | [diff] [blame] | 604 | int _Py_SwappedOp[] = {Py_GT, Py_GE, Py_EQ, Py_NE, Py_LT, Py_LE}; |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 605 | |
Guido van Rossum | 9a4e95c | 2006-12-19 21:35:46 +0000 | [diff] [blame] | 606 | static char *opstrings[] = {"<", "<=", "==", "!=", ">", ">="}; |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 607 | |
| 608 | /* Perform a rich comparison, raising TypeError when the requested comparison |
| 609 | operator is not supported. */ |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 610 | static PyObject * |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 611 | do_richcompare(PyObject *v, PyObject *w, int op) |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 612 | { |
| 613 | richcmpfunc f; |
| 614 | PyObject *res; |
| 615 | |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 616 | if (v->ob_type != w->ob_type && |
| 617 | PyType_IsSubtype(w->ob_type, v->ob_type) && |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 618 | (f = w->ob_type->tp_richcompare) != NULL) { |
Tim Peters | f4aca75 | 2004-09-23 02:39:37 +0000 | [diff] [blame] | 619 | res = (*f)(w, v, _Py_SwappedOp[op]); |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 620 | if (res != Py_NotImplemented) |
| 621 | return res; |
| 622 | Py_DECREF(res); |
| 623 | } |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 624 | if ((f = v->ob_type->tp_richcompare) != NULL) { |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 625 | res = (*f)(v, w, op); |
| 626 | if (res != Py_NotImplemented) |
| 627 | return res; |
| 628 | Py_DECREF(res); |
| 629 | } |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 630 | if ((f = w->ob_type->tp_richcompare) != NULL) { |
| 631 | res = (*f)(w, v, _Py_SwappedOp[op]); |
| 632 | if (res != Py_NotImplemented) |
| 633 | return res; |
| 634 | Py_DECREF(res); |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 635 | } |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 636 | /* If neither object implements it, provide a sensible default |
| 637 | for == and !=, but raise an exception for ordering. */ |
| 638 | switch (op) { |
| 639 | case Py_EQ: |
| 640 | res = (v == w) ? Py_True : Py_False; |
| 641 | break; |
| 642 | case Py_NE: |
| 643 | res = (v != w) ? Py_True : Py_False; |
| 644 | break; |
| 645 | default: |
Guido van Rossum | 9a4e95c | 2006-12-19 21:35:46 +0000 | [diff] [blame] | 646 | /* XXX Special-case None so it doesn't show as NoneType() */ |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 647 | PyErr_Format(PyExc_TypeError, |
| 648 | "unorderable types: %.100s() %s %.100s()", |
| 649 | v->ob_type->tp_name, |
| 650 | opstrings[op], |
| 651 | w->ob_type->tp_name); |
| 652 | return NULL; |
| 653 | } |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 654 | Py_INCREF(res); |
| 655 | return res; |
| 656 | } |
| 657 | |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 658 | /* Perform a rich comparison with object result. This wraps do_richcompare() |
| 659 | with a check for NULL arguments and a recursion check. */ |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 660 | |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 661 | PyObject * |
| 662 | PyObject_RichCompare(PyObject *v, PyObject *w, int op) |
| 663 | { |
| 664 | PyObject *res; |
| 665 | |
| 666 | assert(Py_LT <= op && op <= Py_GE); |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 667 | if (v == NULL || w == NULL) { |
| 668 | if (!PyErr_Occurred()) |
| 669 | PyErr_BadInternalCall(); |
| 670 | return NULL; |
| 671 | } |
Armin Rigo | 2b3eb40 | 2003-10-28 12:05:48 +0000 | [diff] [blame] | 672 | if (Py_EnterRecursiveCall(" in cmp")) |
| 673 | return NULL; |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 674 | res = do_richcompare(v, w, op); |
Armin Rigo | 2b3eb40 | 2003-10-28 12:05:48 +0000 | [diff] [blame] | 675 | Py_LeaveRecursiveCall(); |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 676 | return res; |
| 677 | } |
| 678 | |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 679 | /* Perform a rich comparison with integer result. This wraps |
| 680 | PyObject_RichCompare(), returning -1 for error, 0 for false, 1 for true. */ |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 681 | int |
| 682 | PyObject_RichCompareBool(PyObject *v, PyObject *w, int op) |
| 683 | { |
Raymond Hettinger | 93d4481 | 2004-03-21 17:01:44 +0000 | [diff] [blame] | 684 | PyObject *res; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 685 | int ok; |
| 686 | |
Raymond Hettinger | 93d4481 | 2004-03-21 17:01:44 +0000 | [diff] [blame] | 687 | res = PyObject_RichCompare(v, w, op); |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 688 | if (res == NULL) |
| 689 | return -1; |
Guido van Rossum | 81912d4 | 2002-08-24 05:33:28 +0000 | [diff] [blame] | 690 | if (PyBool_Check(res)) |
| 691 | ok = (res == Py_True); |
| 692 | else |
| 693 | ok = PyObject_IsTrue(res); |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 694 | Py_DECREF(res); |
| 695 | return ok; |
| 696 | } |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 697 | |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 698 | /* Turn the result of a three-way comparison into the result expected by a |
| 699 | rich comparison. */ |
| 700 | PyObject * |
| 701 | Py_CmpToRich(int op, int cmp) |
| 702 | { |
| 703 | PyObject *res; |
| 704 | int ok; |
| 705 | |
| 706 | if (PyErr_Occurred()) |
| 707 | return NULL; |
| 708 | switch (op) { |
| 709 | case Py_LT: |
| 710 | ok = cmp < 0; |
| 711 | break; |
| 712 | case Py_LE: |
| 713 | ok = cmp <= 0; |
| 714 | break; |
| 715 | case Py_EQ: |
| 716 | ok = cmp == 0; |
| 717 | break; |
| 718 | case Py_NE: |
| 719 | ok = cmp != 0; |
| 720 | break; |
| 721 | case Py_GT: |
| 722 | ok = cmp > 0; |
| 723 | break; |
| 724 | case Py_GE: |
| 725 | ok = cmp >= 0; |
| 726 | break; |
| 727 | default: |
| 728 | PyErr_BadArgument(); |
| 729 | return NULL; |
| 730 | } |
| 731 | res = ok ? Py_True : Py_False; |
| 732 | Py_INCREF(res); |
| 733 | return res; |
| 734 | } |
| 735 | |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 736 | /* Set of hash utility functions to help maintaining the invariant that |
Raymond Hettinger | 8183fa4 | 2004-03-21 17:35:06 +0000 | [diff] [blame] | 737 | if a==b then hash(a)==hash(b) |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 738 | |
| 739 | All the utility functions (_Py_Hash*()) return "-1" to signify an error. |
| 740 | */ |
| 741 | |
| 742 | long |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 743 | _Py_HashDouble(double v) |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 744 | { |
Tim Peters | 39dce29 | 2000-08-15 03:34:48 +0000 | [diff] [blame] | 745 | double intpart, fractpart; |
| 746 | int expo; |
| 747 | long hipart; |
| 748 | long x; /* the final hash value */ |
| 749 | /* This is designed so that Python numbers of different types |
| 750 | * that compare equal hash to the same value; otherwise comparisons |
| 751 | * of mapping keys will turn out weird. |
| 752 | */ |
| 753 | |
Tim Peters | 39dce29 | 2000-08-15 03:34:48 +0000 | [diff] [blame] | 754 | fractpart = modf(v, &intpart); |
Tim Peters | 39dce29 | 2000-08-15 03:34:48 +0000 | [diff] [blame] | 755 | if (fractpart == 0.0) { |
| 756 | /* This must return the same hash as an equal int or long. */ |
| 757 | if (intpart > LONG_MAX || -intpart > LONG_MAX) { |
| 758 | /* Convert to long and use its hash. */ |
| 759 | PyObject *plong; /* converted to Python long */ |
| 760 | if (Py_IS_INFINITY(intpart)) |
| 761 | /* can't convert to long int -- arbitrary */ |
| 762 | v = v < 0 ? -271828.0 : 314159.0; |
| 763 | plong = PyLong_FromDouble(v); |
| 764 | if (plong == NULL) |
| 765 | return -1; |
| 766 | x = PyObject_Hash(plong); |
| 767 | Py_DECREF(plong); |
| 768 | return x; |
| 769 | } |
| 770 | /* Fits in a C long == a Python int, so is its own hash. */ |
| 771 | x = (long)intpart; |
| 772 | if (x == -1) |
| 773 | x = -2; |
| 774 | return x; |
| 775 | } |
| 776 | /* The fractional part is non-zero, so we don't have to worry about |
| 777 | * making this match the hash of some other type. |
| 778 | * Use frexp to get at the bits in the double. |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 779 | * Since the VAX D double format has 56 mantissa bits, which is the |
| 780 | * most of any double format in use, each of these parts may have as |
| 781 | * many as (but no more than) 56 significant bits. |
Tim Peters | 39dce29 | 2000-08-15 03:34:48 +0000 | [diff] [blame] | 782 | * So, assuming sizeof(long) >= 4, each part can be broken into two |
| 783 | * longs; frexp and multiplication are used to do that. |
| 784 | * Also, since the Cray double format has 15 exponent bits, which is |
| 785 | * the most of any double format in use, shifting the exponent field |
| 786 | * left by 15 won't overflow a long (again assuming sizeof(long) >= 4). |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 787 | */ |
Tim Peters | 39dce29 | 2000-08-15 03:34:48 +0000 | [diff] [blame] | 788 | v = frexp(v, &expo); |
| 789 | v *= 2147483648.0; /* 2**31 */ |
| 790 | hipart = (long)v; /* take the top 32 bits */ |
| 791 | v = (v - (double)hipart) * 2147483648.0; /* get the next 32 bits */ |
| 792 | x = hipart + (long)v + (expo << 15); |
| 793 | if (x == -1) |
| 794 | x = -2; |
| 795 | return x; |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 796 | } |
| 797 | |
| 798 | long |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 799 | _Py_HashPointer(void *p) |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 800 | { |
| 801 | #if SIZEOF_LONG >= SIZEOF_VOID_P |
| 802 | return (long)p; |
| 803 | #else |
| 804 | /* convert to a Python long and hash that */ |
| 805 | PyObject* longobj; |
| 806 | long x; |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 807 | |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 808 | if ((longobj = PyLong_FromVoidPtr(p)) == NULL) { |
| 809 | x = -1; |
| 810 | goto finally; |
| 811 | } |
| 812 | x = PyObject_Hash(longobj); |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 813 | |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 814 | finally: |
| 815 | Py_XDECREF(longobj); |
| 816 | return x; |
| 817 | #endif |
| 818 | } |
| 819 | |
| 820 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 821 | long |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 822 | PyObject_Hash(PyObject *v) |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 823 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 824 | PyTypeObject *tp = v->ob_type; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 825 | if (tp->tp_hash != NULL) |
| 826 | return (*tp->tp_hash)(v); |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 827 | /* Otherwise, the object can't be hashed */ |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 828 | PyErr_Format(PyExc_TypeError, "unhashable type: '%.200s'", |
| 829 | v->ob_type->tp_name); |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 830 | return -1; |
| 831 | } |
| 832 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 833 | PyObject * |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 834 | PyObject_GetAttrString(PyObject *v, const char *name) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 835 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 836 | PyObject *w, *res; |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 837 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 838 | if (v->ob_type->tp_getattr != NULL) |
Martin v. Löwis | 15e6274 | 2006-02-27 16:46:16 +0000 | [diff] [blame] | 839 | return (*v->ob_type->tp_getattr)(v, (char*)name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 840 | w = PyString_InternFromString(name); |
| 841 | if (w == NULL) |
| 842 | return NULL; |
| 843 | res = PyObject_GetAttr(v, w); |
| 844 | Py_XDECREF(w); |
| 845 | return res; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 846 | } |
| 847 | |
| 848 | int |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 849 | PyObject_HasAttrString(PyObject *v, const char *name) |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 850 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 851 | PyObject *res = PyObject_GetAttrString(v, name); |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 852 | if (res != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 853 | Py_DECREF(res); |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 854 | return 1; |
| 855 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 856 | PyErr_Clear(); |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 857 | return 0; |
| 858 | } |
| 859 | |
| 860 | int |
Jeremy Hylton | af68c87 | 2005-12-10 18:50:16 +0000 | [diff] [blame] | 861 | PyObject_SetAttrString(PyObject *v, const char *name, PyObject *w) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 862 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 863 | PyObject *s; |
| 864 | int res; |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 865 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 866 | if (v->ob_type->tp_setattr != NULL) |
Martin v. Löwis | 15e6274 | 2006-02-27 16:46:16 +0000 | [diff] [blame] | 867 | return (*v->ob_type->tp_setattr)(v, (char*)name, w); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 868 | s = PyString_InternFromString(name); |
| 869 | if (s == NULL) |
| 870 | return -1; |
| 871 | res = PyObject_SetAttr(v, s, w); |
| 872 | Py_XDECREF(s); |
| 873 | return res; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 874 | } |
| 875 | |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 876 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 877 | PyObject_GetAttr(PyObject *v, PyObject *name) |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 878 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 879 | PyTypeObject *tp = v->ob_type; |
| 880 | |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 881 | if (!PyString_Check(name)) { |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 882 | /* The Unicode to string conversion is done here because the |
| 883 | existing tp_getattro slots expect a string object as name |
| 884 | and we wouldn't want to break those. */ |
| 885 | if (PyUnicode_Check(name)) { |
| 886 | name = _PyUnicode_AsDefaultEncodedString(name, NULL); |
| 887 | if (name == NULL) |
| 888 | return NULL; |
| 889 | } |
| 890 | else |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 891 | { |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 892 | PyErr_Format(PyExc_TypeError, |
| 893 | "attribute name must be string, not '%.200s'", |
| 894 | name->ob_type->tp_name); |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 895 | return NULL; |
| 896 | } |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 897 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 898 | if (tp->tp_getattro != NULL) |
| 899 | return (*tp->tp_getattro)(v, name); |
| 900 | if (tp->tp_getattr != NULL) |
| 901 | return (*tp->tp_getattr)(v, PyString_AS_STRING(name)); |
| 902 | PyErr_Format(PyExc_AttributeError, |
| 903 | "'%.50s' object has no attribute '%.400s'", |
| 904 | tp->tp_name, PyString_AS_STRING(name)); |
| 905 | return NULL; |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 906 | } |
| 907 | |
| 908 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 909 | PyObject_HasAttr(PyObject *v, PyObject *name) |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 910 | { |
| 911 | PyObject *res = PyObject_GetAttr(v, name); |
| 912 | if (res != NULL) { |
| 913 | Py_DECREF(res); |
| 914 | return 1; |
| 915 | } |
| 916 | PyErr_Clear(); |
| 917 | return 0; |
| 918 | } |
| 919 | |
| 920 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 921 | PyObject_SetAttr(PyObject *v, PyObject *name, PyObject *value) |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 922 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 923 | PyTypeObject *tp = v->ob_type; |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 924 | int err; |
Marc-André Lemburg | e44e507 | 2000-09-18 16:20:57 +0000 | [diff] [blame] | 925 | |
Guido van Rossum | f15a29f | 2007-05-04 00:41:39 +0000 | [diff] [blame] | 926 | if (!PyString_Check(name)) { |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 927 | /* The Unicode to string conversion is done here because the |
| 928 | existing tp_setattro slots expect a string object as name |
| 929 | and we wouldn't want to break those. */ |
| 930 | if (PyUnicode_Check(name)) { |
Guido van Rossum | f15a29f | 2007-05-04 00:41:39 +0000 | [diff] [blame] | 931 | name = _PyUnicode_AsDefaultEncodedString(name, NULL); |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 932 | if (name == NULL) |
| 933 | return -1; |
| 934 | } |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 935 | else |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 936 | { |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 937 | PyErr_Format(PyExc_TypeError, |
| 938 | "attribute name must be string, not '%.200s'", |
| 939 | name->ob_type->tp_name); |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 940 | return -1; |
| 941 | } |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 942 | } |
Guido van Rossum | f15a29f | 2007-05-04 00:41:39 +0000 | [diff] [blame] | 943 | Py_INCREF(name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 944 | |
| 945 | PyString_InternInPlace(&name); |
| 946 | if (tp->tp_setattro != NULL) { |
| 947 | err = (*tp->tp_setattro)(v, name, value); |
| 948 | Py_DECREF(name); |
| 949 | return err; |
Marc-André Lemburg | e44e507 | 2000-09-18 16:20:57 +0000 | [diff] [blame] | 950 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 951 | if (tp->tp_setattr != NULL) { |
| 952 | err = (*tp->tp_setattr)(v, PyString_AS_STRING(name), value); |
| 953 | Py_DECREF(name); |
| 954 | return err; |
| 955 | } |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 956 | Py_DECREF(name); |
Guido van Rossum | f15a29f | 2007-05-04 00:41:39 +0000 | [diff] [blame] | 957 | assert(name->ob_refcnt >= 1); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 958 | if (tp->tp_getattr == NULL && tp->tp_getattro == NULL) |
| 959 | PyErr_Format(PyExc_TypeError, |
| 960 | "'%.100s' object has no attributes " |
| 961 | "(%s .%.100s)", |
| 962 | tp->tp_name, |
| 963 | value==NULL ? "del" : "assign to", |
| 964 | PyString_AS_STRING(name)); |
| 965 | else |
| 966 | PyErr_Format(PyExc_TypeError, |
| 967 | "'%.100s' object has only read-only attributes " |
| 968 | "(%s .%.100s)", |
| 969 | tp->tp_name, |
| 970 | value==NULL ? "del" : "assign to", |
| 971 | PyString_AS_STRING(name)); |
| 972 | return -1; |
| 973 | } |
| 974 | |
| 975 | /* Helper to get a pointer to an object's __dict__ slot, if any */ |
| 976 | |
| 977 | PyObject ** |
| 978 | _PyObject_GetDictPtr(PyObject *obj) |
| 979 | { |
Martin v. Löwis | 725507b | 2006-03-07 12:08:51 +0000 | [diff] [blame] | 980 | Py_ssize_t dictoffset; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 981 | PyTypeObject *tp = obj->ob_type; |
| 982 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 983 | dictoffset = tp->tp_dictoffset; |
| 984 | if (dictoffset == 0) |
| 985 | return NULL; |
| 986 | if (dictoffset < 0) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 987 | Py_ssize_t tsize; |
Guido van Rossum | 2eb0b87 | 2002-03-01 22:24:49 +0000 | [diff] [blame] | 988 | size_t size; |
| 989 | |
| 990 | tsize = ((PyVarObject *)obj)->ob_size; |
| 991 | if (tsize < 0) |
| 992 | tsize = -tsize; |
| 993 | size = _PyObject_VAR_SIZE(tp, tsize); |
| 994 | |
Tim Peters | 6d483d3 | 2001-10-06 21:27:34 +0000 | [diff] [blame] | 995 | dictoffset += (long)size; |
| 996 | assert(dictoffset > 0); |
| 997 | assert(dictoffset % SIZEOF_VOID_P == 0); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 998 | } |
| 999 | return (PyObject **) ((char *)obj + dictoffset); |
| 1000 | } |
| 1001 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1002 | PyObject * |
Raymond Hettinger | 1da1dbf | 2003-03-17 19:46:11 +0000 | [diff] [blame] | 1003 | PyObject_SelfIter(PyObject *obj) |
Raymond Hettinger | 0153826 | 2003-03-17 08:24:35 +0000 | [diff] [blame] | 1004 | { |
| 1005 | Py_INCREF(obj); |
| 1006 | return obj; |
| 1007 | } |
| 1008 | |
Michael W. Hudson | 1593f50 | 2004-09-14 17:09:47 +0000 | [diff] [blame] | 1009 | /* Generic GetAttr functions - put these in your tp_[gs]etattro slot */ |
| 1010 | |
Raymond Hettinger | 0153826 | 2003-03-17 08:24:35 +0000 | [diff] [blame] | 1011 | PyObject * |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1012 | PyObject_GenericGetAttr(PyObject *obj, PyObject *name) |
| 1013 | { |
| 1014 | PyTypeObject *tp = obj->ob_type; |
Guido van Rossum | 056fbf4 | 2002-08-19 19:22:50 +0000 | [diff] [blame] | 1015 | PyObject *descr = NULL; |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1016 | PyObject *res = NULL; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1017 | descrgetfunc f; |
Martin v. Löwis | 725507b | 2006-03-07 12:08:51 +0000 | [diff] [blame] | 1018 | Py_ssize_t dictoffset; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1019 | PyObject **dictptr; |
| 1020 | |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1021 | if (!PyString_Check(name)){ |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 1022 | /* The Unicode to string conversion is done here because the |
| 1023 | existing tp_setattro slots expect a string object as name |
| 1024 | and we wouldn't want to break those. */ |
| 1025 | if (PyUnicode_Check(name)) { |
| 1026 | name = PyUnicode_AsEncodedString(name, NULL, NULL); |
| 1027 | if (name == NULL) |
| 1028 | return NULL; |
| 1029 | } |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1030 | else |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 1031 | { |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1032 | PyErr_Format(PyExc_TypeError, |
| 1033 | "attribute name must be string, not '%.200s'", |
| 1034 | name->ob_type->tp_name); |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 1035 | return NULL; |
| 1036 | } |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1037 | } |
| 1038 | else |
| 1039 | Py_INCREF(name); |
| 1040 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1041 | if (tp->tp_dict == NULL) { |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 1042 | if (PyType_Ready(tp) < 0) |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1043 | goto done; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1044 | } |
| 1045 | |
Guido van Rossum | 056fbf4 | 2002-08-19 19:22:50 +0000 | [diff] [blame] | 1046 | /* Inline _PyType_Lookup */ |
| 1047 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1048 | Py_ssize_t i, n; |
Guido van Rossum | 056fbf4 | 2002-08-19 19:22:50 +0000 | [diff] [blame] | 1049 | PyObject *mro, *base, *dict; |
| 1050 | |
| 1051 | /* Look in tp_dict of types in MRO */ |
| 1052 | mro = tp->tp_mro; |
| 1053 | assert(mro != NULL); |
| 1054 | assert(PyTuple_Check(mro)); |
| 1055 | n = PyTuple_GET_SIZE(mro); |
| 1056 | for (i = 0; i < n; i++) { |
| 1057 | base = PyTuple_GET_ITEM(mro, i); |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 1058 | assert(PyType_Check(base)); |
| 1059 | dict = ((PyTypeObject *)base)->tp_dict; |
Guido van Rossum | 056fbf4 | 2002-08-19 19:22:50 +0000 | [diff] [blame] | 1060 | assert(dict && PyDict_Check(dict)); |
| 1061 | descr = PyDict_GetItem(dict, name); |
| 1062 | if (descr != NULL) |
| 1063 | break; |
| 1064 | } |
| 1065 | } |
| 1066 | |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 1067 | Py_XINCREF(descr); |
| 1068 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1069 | f = NULL; |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 1070 | if (descr != NULL) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1071 | f = descr->ob_type->tp_descr_get; |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1072 | if (f != NULL && PyDescr_IsData(descr)) { |
| 1073 | res = f(descr, obj, (PyObject *)obj->ob_type); |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 1074 | Py_DECREF(descr); |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1075 | goto done; |
| 1076 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1077 | } |
| 1078 | |
Guido van Rossum | c66ff44 | 2002-08-19 16:50:48 +0000 | [diff] [blame] | 1079 | /* Inline _PyObject_GetDictPtr */ |
| 1080 | dictoffset = tp->tp_dictoffset; |
| 1081 | if (dictoffset != 0) { |
| 1082 | PyObject *dict; |
| 1083 | if (dictoffset < 0) { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1084 | Py_ssize_t tsize; |
Guido van Rossum | c66ff44 | 2002-08-19 16:50:48 +0000 | [diff] [blame] | 1085 | size_t size; |
| 1086 | |
| 1087 | tsize = ((PyVarObject *)obj)->ob_size; |
| 1088 | if (tsize < 0) |
| 1089 | tsize = -tsize; |
| 1090 | size = _PyObject_VAR_SIZE(tp, tsize); |
| 1091 | |
| 1092 | dictoffset += (long)size; |
| 1093 | assert(dictoffset > 0); |
| 1094 | assert(dictoffset % SIZEOF_VOID_P == 0); |
| 1095 | } |
| 1096 | dictptr = (PyObject **) ((char *)obj + dictoffset); |
| 1097 | dict = *dictptr; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1098 | if (dict != NULL) { |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1099 | res = PyDict_GetItem(dict, name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1100 | if (res != NULL) { |
| 1101 | Py_INCREF(res); |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 1102 | Py_XDECREF(descr); |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1103 | goto done; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1104 | } |
| 1105 | } |
| 1106 | } |
| 1107 | |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1108 | if (f != NULL) { |
| 1109 | res = f(descr, obj, (PyObject *)obj->ob_type); |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 1110 | Py_DECREF(descr); |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1111 | goto done; |
| 1112 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1113 | |
| 1114 | if (descr != NULL) { |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1115 | res = descr; |
Michael W. Hudson | b2c7de4 | 2003-08-15 13:07:47 +0000 | [diff] [blame] | 1116 | /* descr was already increfed above */ |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1117 | goto done; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1118 | } |
| 1119 | |
| 1120 | PyErr_Format(PyExc_AttributeError, |
| 1121 | "'%.50s' object has no attribute '%.400s'", |
| 1122 | tp->tp_name, PyString_AS_STRING(name)); |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1123 | done: |
| 1124 | Py_DECREF(name); |
| 1125 | return res; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1126 | } |
| 1127 | |
| 1128 | int |
| 1129 | PyObject_GenericSetAttr(PyObject *obj, PyObject *name, PyObject *value) |
| 1130 | { |
| 1131 | PyTypeObject *tp = obj->ob_type; |
| 1132 | PyObject *descr; |
| 1133 | descrsetfunc f; |
| 1134 | PyObject **dictptr; |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1135 | int res = -1; |
| 1136 | |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1137 | if (!PyString_Check(name)){ |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 1138 | /* The Unicode to string conversion is done here because the |
| 1139 | existing tp_setattro slots expect a string object as name |
| 1140 | and we wouldn't want to break those. */ |
| 1141 | if (PyUnicode_Check(name)) { |
| 1142 | name = PyUnicode_AsEncodedString(name, NULL, NULL); |
| 1143 | if (name == NULL) |
| 1144 | return -1; |
| 1145 | } |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1146 | else |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 1147 | { |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1148 | PyErr_Format(PyExc_TypeError, |
| 1149 | "attribute name must be string, not '%.200s'", |
| 1150 | name->ob_type->tp_name); |
Martin v. Löwis | 0c160a0 | 2002-03-15 13:40:30 +0000 | [diff] [blame] | 1151 | return -1; |
| 1152 | } |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1153 | } |
| 1154 | else |
| 1155 | Py_INCREF(name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1156 | |
| 1157 | if (tp->tp_dict == NULL) { |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 1158 | if (PyType_Ready(tp) < 0) |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1159 | goto done; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1160 | } |
| 1161 | |
| 1162 | descr = _PyType_Lookup(tp, name); |
| 1163 | f = NULL; |
Guido van Rossum | 3cf5b1e | 2006-07-27 21:53:35 +0000 | [diff] [blame] | 1164 | if (descr != NULL) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1165 | f = descr->ob_type->tp_descr_set; |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1166 | if (f != NULL && PyDescr_IsData(descr)) { |
| 1167 | res = f(descr, obj, value); |
| 1168 | goto done; |
| 1169 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | dictptr = _PyObject_GetDictPtr(obj); |
| 1173 | if (dictptr != NULL) { |
| 1174 | PyObject *dict = *dictptr; |
| 1175 | if (dict == NULL && value != NULL) { |
| 1176 | dict = PyDict_New(); |
| 1177 | if (dict == NULL) |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1178 | goto done; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1179 | *dictptr = dict; |
| 1180 | } |
| 1181 | if (dict != NULL) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1182 | if (value == NULL) |
| 1183 | res = PyDict_DelItem(dict, name); |
| 1184 | else |
| 1185 | res = PyDict_SetItem(dict, name, value); |
| 1186 | if (res < 0 && PyErr_ExceptionMatches(PyExc_KeyError)) |
| 1187 | PyErr_SetObject(PyExc_AttributeError, name); |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1188 | goto done; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1189 | } |
| 1190 | } |
| 1191 | |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1192 | if (f != NULL) { |
| 1193 | res = f(descr, obj, value); |
| 1194 | goto done; |
| 1195 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1196 | |
| 1197 | if (descr == NULL) { |
| 1198 | PyErr_Format(PyExc_AttributeError, |
Thomas Wouters | 0e3f591 | 2006-08-11 14:57:12 +0000 | [diff] [blame] | 1199 | "'%.100s' object has no attribute '%.200s'", |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1200 | tp->tp_name, PyString_AS_STRING(name)); |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1201 | goto done; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1202 | } |
| 1203 | |
| 1204 | PyErr_Format(PyExc_AttributeError, |
| 1205 | "'%.50s' object attribute '%.400s' is read-only", |
| 1206 | tp->tp_name, PyString_AS_STRING(name)); |
Guido van Rossum | ebca9fc | 2001-12-04 15:54:53 +0000 | [diff] [blame] | 1207 | done: |
| 1208 | Py_DECREF(name); |
| 1209 | return res; |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 1210 | } |
| 1211 | |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1212 | /* Test a value used as condition, e.g., in a for or if statement. |
| 1213 | Return -1 if an error occurred */ |
| 1214 | |
| 1215 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1216 | PyObject_IsTrue(PyObject *v) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1217 | { |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1218 | Py_ssize_t res; |
Guido van Rossum | 6248f44 | 2002-08-24 06:31:34 +0000 | [diff] [blame] | 1219 | if (v == Py_True) |
| 1220 | return 1; |
| 1221 | if (v == Py_False) |
| 1222 | return 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1223 | if (v == Py_None) |
Neal Norwitz | 51290d3 | 2002-06-13 21:32:44 +0000 | [diff] [blame] | 1224 | return 0; |
Guido van Rossum | 1c4f458 | 1998-05-22 00:53:24 +0000 | [diff] [blame] | 1225 | else if (v->ob_type->tp_as_number != NULL && |
Jack Diederich | 4dafcc4 | 2006-11-28 19:15:13 +0000 | [diff] [blame] | 1226 | v->ob_type->tp_as_number->nb_bool != NULL) |
| 1227 | res = (*v->ob_type->tp_as_number->nb_bool)(v); |
Guido van Rossum | 1c4f458 | 1998-05-22 00:53:24 +0000 | [diff] [blame] | 1228 | else if (v->ob_type->tp_as_mapping != NULL && |
| 1229 | v->ob_type->tp_as_mapping->mp_length != NULL) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1230 | res = (*v->ob_type->tp_as_mapping->mp_length)(v); |
Guido van Rossum | 1c4f458 | 1998-05-22 00:53:24 +0000 | [diff] [blame] | 1231 | else if (v->ob_type->tp_as_sequence != NULL && |
| 1232 | v->ob_type->tp_as_sequence->sq_length != NULL) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1233 | res = (*v->ob_type->tp_as_sequence->sq_length)(v); |
| 1234 | else |
Neal Norwitz | 51290d3 | 2002-06-13 21:32:44 +0000 | [diff] [blame] | 1235 | return 1; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1236 | /* if it is negative, it should be either -1 or -2 */ |
| 1237 | return (res > 0) ? 1 : Py_SAFE_DOWNCAST(res, Py_ssize_t, int); |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1238 | } |
| 1239 | |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1240 | /* equivalent of 'not v' |
Guido van Rossum | c3d3f96 | 1998-04-09 17:53:59 +0000 | [diff] [blame] | 1241 | Return -1 if an error occurred */ |
| 1242 | |
| 1243 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1244 | PyObject_Not(PyObject *v) |
Guido van Rossum | c3d3f96 | 1998-04-09 17:53:59 +0000 | [diff] [blame] | 1245 | { |
| 1246 | int res; |
| 1247 | res = PyObject_IsTrue(v); |
| 1248 | if (res < 0) |
| 1249 | return res; |
| 1250 | return res == 0; |
| 1251 | } |
| 1252 | |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1253 | /* Test whether an object can be called */ |
| 1254 | |
| 1255 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1256 | PyCallable_Check(PyObject *x) |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1257 | { |
| 1258 | if (x == NULL) |
| 1259 | return 0; |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 1260 | return x->ob_type->tp_call != NULL; |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1261 | } |
| 1262 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1263 | /* ------------------------- PyObject_Dir() helpers ------------------------- */ |
| 1264 | |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1265 | /* Helper for PyObject_Dir. |
| 1266 | Merge the __dict__ of aclass into dict, and recursively also all |
| 1267 | the __dict__s of aclass's base classes. The order of merging isn't |
| 1268 | defined, as it's expected that only the final set of dict keys is |
| 1269 | interesting. |
| 1270 | Return 0 on success, -1 on error. |
| 1271 | */ |
| 1272 | |
| 1273 | static int |
| 1274 | merge_class_dict(PyObject* dict, PyObject* aclass) |
| 1275 | { |
| 1276 | PyObject *classdict; |
| 1277 | PyObject *bases; |
| 1278 | |
| 1279 | assert(PyDict_Check(dict)); |
| 1280 | assert(aclass); |
| 1281 | |
| 1282 | /* Merge in the type's dict (if any). */ |
| 1283 | classdict = PyObject_GetAttrString(aclass, "__dict__"); |
| 1284 | if (classdict == NULL) |
| 1285 | PyErr_Clear(); |
| 1286 | else { |
| 1287 | int status = PyDict_Update(dict, classdict); |
| 1288 | Py_DECREF(classdict); |
| 1289 | if (status < 0) |
| 1290 | return -1; |
| 1291 | } |
| 1292 | |
| 1293 | /* Recursively merge in the base types' (if any) dicts. */ |
| 1294 | bases = PyObject_GetAttrString(aclass, "__bases__"); |
Tim Peters | bc7e863 | 2001-09-16 20:33:22 +0000 | [diff] [blame] | 1295 | if (bases == NULL) |
| 1296 | PyErr_Clear(); |
| 1297 | else { |
Guido van Rossum | 4402241 | 2002-05-13 18:29:46 +0000 | [diff] [blame] | 1298 | /* We have no guarantee that bases is a real tuple */ |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1299 | Py_ssize_t i, n; |
Guido van Rossum | 4402241 | 2002-05-13 18:29:46 +0000 | [diff] [blame] | 1300 | n = PySequence_Size(bases); /* This better be right */ |
| 1301 | if (n < 0) |
| 1302 | PyErr_Clear(); |
| 1303 | else { |
| 1304 | for (i = 0; i < n; i++) { |
Tim Peters | 18e7083 | 2003-02-05 19:35:19 +0000 | [diff] [blame] | 1305 | int status; |
Guido van Rossum | 4402241 | 2002-05-13 18:29:46 +0000 | [diff] [blame] | 1306 | PyObject *base = PySequence_GetItem(bases, i); |
| 1307 | if (base == NULL) { |
| 1308 | Py_DECREF(bases); |
| 1309 | return -1; |
| 1310 | } |
Tim Peters | 18e7083 | 2003-02-05 19:35:19 +0000 | [diff] [blame] | 1311 | status = merge_class_dict(dict, base); |
| 1312 | Py_DECREF(base); |
| 1313 | if (status < 0) { |
Guido van Rossum | 4402241 | 2002-05-13 18:29:46 +0000 | [diff] [blame] | 1314 | Py_DECREF(bases); |
| 1315 | return -1; |
| 1316 | } |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1317 | } |
| 1318 | } |
| 1319 | Py_DECREF(bases); |
| 1320 | } |
| 1321 | return 0; |
| 1322 | } |
| 1323 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1324 | /* Helper for PyObject_Dir without arguments: returns the local scope. */ |
| 1325 | static PyObject * |
Guido van Rossum | ad7d8d1 | 2007-04-13 01:39:34 +0000 | [diff] [blame] | 1326 | _dir_locals(void) |
Tim Peters | 305b585 | 2001-09-17 02:38:46 +0000 | [diff] [blame] | 1327 | { |
Georg Brandl | ed3b838 | 2007-03-12 13:15:14 +0000 | [diff] [blame] | 1328 | PyObject *names; |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1329 | PyObject *locals = PyEval_GetLocals(); |
Tim Peters | 305b585 | 2001-09-17 02:38:46 +0000 | [diff] [blame] | 1330 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1331 | if (locals == NULL) { |
| 1332 | PyErr_SetString(PyExc_SystemError, "frame does not exist"); |
| 1333 | return NULL; |
Tim Peters | 305b585 | 2001-09-17 02:38:46 +0000 | [diff] [blame] | 1334 | } |
| 1335 | |
Georg Brandl | ed3b838 | 2007-03-12 13:15:14 +0000 | [diff] [blame] | 1336 | names = PyMapping_Keys(locals); |
| 1337 | if (!names) |
| 1338 | return NULL; |
| 1339 | if (!PyList_Check(names)) { |
| 1340 | PyErr_Format(PyExc_TypeError, |
| 1341 | "dir(): expected keys() of locals to be a list, " |
| 1342 | "not '%.200s'", names->ob_type->tp_name); |
| 1343 | Py_DECREF(names); |
| 1344 | return NULL; |
| 1345 | } |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1346 | /* the locals don't need to be DECREF'd */ |
Georg Brandl | ed3b838 | 2007-03-12 13:15:14 +0000 | [diff] [blame] | 1347 | return names; |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1348 | } |
| 1349 | |
| 1350 | /* Helper for PyObject_Dir of type objects: returns __dict__ and __bases__. |
| 1351 | We deliberately don't suck up its __class__, as methods belonging to the |
| 1352 | metaclass would probably be more confusing than helpful. |
| 1353 | */ |
| 1354 | static PyObject * |
| 1355 | _specialized_dir_type(PyObject *obj) |
| 1356 | { |
| 1357 | PyObject *result = NULL; |
| 1358 | PyObject *dict = PyDict_New(); |
| 1359 | |
| 1360 | if (dict != NULL && merge_class_dict(dict, obj) == 0) |
| 1361 | result = PyDict_Keys(dict); |
| 1362 | |
| 1363 | Py_XDECREF(dict); |
Tim Peters | 305b585 | 2001-09-17 02:38:46 +0000 | [diff] [blame] | 1364 | return result; |
| 1365 | } |
| 1366 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1367 | /* Helper for PyObject_Dir of module objects: returns the module's __dict__. */ |
| 1368 | static PyObject * |
| 1369 | _specialized_dir_module(PyObject *obj) |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1370 | { |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1371 | PyObject *result = NULL; |
| 1372 | PyObject *dict = PyObject_GetAttrString(obj, "__dict__"); |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1373 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1374 | if (dict != NULL) { |
| 1375 | if (PyDict_Check(dict)) |
| 1376 | result = PyDict_Keys(dict); |
| 1377 | else { |
| 1378 | PyErr_Format(PyExc_TypeError, |
| 1379 | "%.200s.__dict__ is not a dictionary", |
| 1380 | PyModule_GetName(obj)); |
Guido van Rossum | 8dbd3d8 | 2001-09-10 18:27:43 +0000 | [diff] [blame] | 1381 | } |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1382 | } |
| 1383 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1384 | Py_XDECREF(dict); |
| 1385 | return result; |
| 1386 | } |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1387 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1388 | /* Helper for PyObject_Dir of generic objects: returns __dict__, __class__, |
| 1389 | and recursively up the __class__.__bases__ chain. |
| 1390 | */ |
| 1391 | static PyObject * |
| 1392 | _generic_dir(PyObject *obj) |
| 1393 | { |
| 1394 | PyObject *result = NULL; |
| 1395 | PyObject *dict = NULL; |
| 1396 | PyObject *itsclass = NULL; |
| 1397 | |
| 1398 | /* Get __dict__ (which may or may not be a real dict...) */ |
| 1399 | dict = PyObject_GetAttrString(obj, "__dict__"); |
| 1400 | if (dict == NULL) { |
| 1401 | PyErr_Clear(); |
| 1402 | dict = PyDict_New(); |
| 1403 | } |
| 1404 | else if (!PyDict_Check(dict)) { |
| 1405 | Py_DECREF(dict); |
| 1406 | dict = PyDict_New(); |
| 1407 | } |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1408 | else { |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1409 | /* Copy __dict__ to avoid mutating it. */ |
| 1410 | PyObject *temp = PyDict_Copy(dict); |
| 1411 | Py_DECREF(dict); |
| 1412 | dict = temp; |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1413 | } |
| 1414 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1415 | if (dict == NULL) |
Raymond Hettinger | 2a7dede | 2004-08-07 04:55:30 +0000 | [diff] [blame] | 1416 | goto error; |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1417 | |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1418 | /* Merge in attrs reachable from its class. */ |
| 1419 | itsclass = PyObject_GetAttrString(obj, "__class__"); |
| 1420 | if (itsclass == NULL) |
| 1421 | /* XXX(tomer): Perhaps fall back to obj->ob_type if no |
| 1422 | __class__ exists? */ |
| 1423 | PyErr_Clear(); |
| 1424 | else { |
| 1425 | if (merge_class_dict(dict, itsclass) != 0) |
| 1426 | goto error; |
| 1427 | } |
| 1428 | |
| 1429 | result = PyDict_Keys(dict); |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1430 | /* fall through */ |
Georg Brandl | e32b422 | 2007-03-10 22:13:27 +0000 | [diff] [blame] | 1431 | error: |
| 1432 | Py_XDECREF(itsclass); |
| 1433 | Py_XDECREF(dict); |
| 1434 | return result; |
| 1435 | } |
| 1436 | |
| 1437 | /* Helper for PyObject_Dir: object introspection. |
| 1438 | This calls one of the above specialized versions if no __dir__ method |
| 1439 | exists. */ |
| 1440 | static PyObject * |
| 1441 | _dir_object(PyObject *obj) |
| 1442 | { |
| 1443 | PyObject * result = NULL; |
| 1444 | PyObject * dirfunc = PyObject_GetAttrString((PyObject*)obj->ob_type, |
| 1445 | "__dir__"); |
| 1446 | |
| 1447 | assert(obj); |
| 1448 | if (dirfunc == NULL) { |
| 1449 | /* use default implementation */ |
| 1450 | PyErr_Clear(); |
| 1451 | if (PyModule_Check(obj)) |
| 1452 | result = _specialized_dir_module(obj); |
| 1453 | else if (PyType_Check(obj)) |
| 1454 | result = _specialized_dir_type(obj); |
| 1455 | else |
| 1456 | result = _generic_dir(obj); |
| 1457 | } |
| 1458 | else { |
| 1459 | /* use __dir__ */ |
| 1460 | result = PyObject_CallFunctionObjArgs(dirfunc, obj, NULL); |
| 1461 | Py_DECREF(dirfunc); |
| 1462 | if (result == NULL) |
| 1463 | return NULL; |
| 1464 | |
| 1465 | /* result must be a list */ |
| 1466 | /* XXX(gbrandl): could also check if all items are strings */ |
| 1467 | if (!PyList_Check(result)) { |
| 1468 | PyErr_Format(PyExc_TypeError, |
| 1469 | "__dir__() must return a list, not %.200s", |
| 1470 | result->ob_type->tp_name); |
| 1471 | Py_DECREF(result); |
| 1472 | result = NULL; |
| 1473 | } |
| 1474 | } |
| 1475 | |
| 1476 | return result; |
| 1477 | } |
| 1478 | |
| 1479 | /* Implementation of dir() -- if obj is NULL, returns the names in the current |
| 1480 | (local) scope. Otherwise, performs introspection of the object: returns a |
| 1481 | sorted list of attribute names (supposedly) accessible from the object |
| 1482 | */ |
| 1483 | PyObject * |
| 1484 | PyObject_Dir(PyObject *obj) |
| 1485 | { |
| 1486 | PyObject * result; |
| 1487 | |
| 1488 | if (obj == NULL) |
| 1489 | /* no object -- introspect the locals */ |
| 1490 | result = _dir_locals(); |
| 1491 | else |
| 1492 | /* object -- introspect the object */ |
| 1493 | result = _dir_object(obj); |
| 1494 | |
| 1495 | assert(result == NULL || PyList_Check(result)); |
| 1496 | |
| 1497 | if (result != NULL && PyList_Sort(result) != 0) { |
| 1498 | /* sorting the list failed */ |
| 1499 | Py_DECREF(result); |
| 1500 | result = NULL; |
| 1501 | } |
| 1502 | |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1503 | return result; |
| 1504 | } |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1505 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1506 | /* |
| 1507 | NoObject is usable as a non-NULL undefined value, used by the macro None. |
| 1508 | There is (and should be!) no way to create other objects of this type, |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1509 | so there is exactly one (which is indestructible, by the way). |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1510 | (XXX This type and the type of NotImplemented below should be unified.) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1511 | */ |
| 1512 | |
Guido van Rossum | 0c182a1 | 1992-03-27 17:26:13 +0000 | [diff] [blame] | 1513 | /* ARGSUSED */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1514 | static PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1515 | none_repr(PyObject *op) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1516 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1517 | return PyString_FromString("None"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1518 | } |
| 1519 | |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 1520 | /* ARGUSED */ |
| 1521 | static void |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1522 | none_dealloc(PyObject* ignore) |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 1523 | { |
| 1524 | /* This should never get called, but we also don't want to SEGV if |
| 1525 | * we accidently decref None out of existance. |
| 1526 | */ |
Martin v. Löwis | 3f19b10 | 2002-08-07 16:21:51 +0000 | [diff] [blame] | 1527 | Py_FatalError("deallocating None"); |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 1528 | } |
| 1529 | |
| 1530 | |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1531 | static PyTypeObject PyNone_Type = { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1532 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1533 | 0, |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1534 | "NoneType", |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1535 | 0, |
| 1536 | 0, |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1537 | none_dealloc, /*tp_dealloc*/ /*never called*/ |
Guido van Rossum | 7066dd7 | 1992-09-17 17:54:56 +0000 | [diff] [blame] | 1538 | 0, /*tp_print*/ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1539 | 0, /*tp_getattr*/ |
| 1540 | 0, /*tp_setattr*/ |
| 1541 | 0, /*tp_compare*/ |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1542 | none_repr, /*tp_repr*/ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1543 | 0, /*tp_as_number*/ |
| 1544 | 0, /*tp_as_sequence*/ |
| 1545 | 0, /*tp_as_mapping*/ |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 1546 | 0, /*tp_hash */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1547 | }; |
| 1548 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1549 | PyObject _Py_NoneStruct = { |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1550 | PyObject_HEAD_INIT(&PyNone_Type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1551 | }; |
| 1552 | |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 1553 | /* NotImplemented is an object that can be used to signal that an |
| 1554 | operation is not implemented for the given type combination. */ |
| 1555 | |
| 1556 | static PyObject * |
| 1557 | NotImplemented_repr(PyObject *op) |
| 1558 | { |
| 1559 | return PyString_FromString("NotImplemented"); |
| 1560 | } |
| 1561 | |
| 1562 | static PyTypeObject PyNotImplemented_Type = { |
| 1563 | PyObject_HEAD_INIT(&PyType_Type) |
| 1564 | 0, |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1565 | "NotImplementedType", |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 1566 | 0, |
| 1567 | 0, |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1568 | none_dealloc, /*tp_dealloc*/ /*never called*/ |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 1569 | 0, /*tp_print*/ |
| 1570 | 0, /*tp_getattr*/ |
| 1571 | 0, /*tp_setattr*/ |
| 1572 | 0, /*tp_compare*/ |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1573 | NotImplemented_repr, /*tp_repr*/ |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 1574 | 0, /*tp_as_number*/ |
| 1575 | 0, /*tp_as_sequence*/ |
| 1576 | 0, /*tp_as_mapping*/ |
| 1577 | 0, /*tp_hash */ |
| 1578 | }; |
| 1579 | |
| 1580 | PyObject _Py_NotImplementedStruct = { |
| 1581 | PyObject_HEAD_INIT(&PyNotImplemented_Type) |
| 1582 | }; |
| 1583 | |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1584 | void |
| 1585 | _Py_ReadyTypes(void) |
| 1586 | { |
| 1587 | if (PyType_Ready(&PyType_Type) < 0) |
| 1588 | Py_FatalError("Can't initialize 'type'"); |
| 1589 | |
Fred Drake | 0a4dd39 | 2004-07-02 18:57:45 +0000 | [diff] [blame] | 1590 | if (PyType_Ready(&_PyWeakref_RefType) < 0) |
| 1591 | Py_FatalError("Can't initialize 'weakref'"); |
| 1592 | |
Guido van Rossum | 77f6a65 | 2002-04-03 22:41:51 +0000 | [diff] [blame] | 1593 | if (PyType_Ready(&PyBool_Type) < 0) |
| 1594 | Py_FatalError("Can't initialize 'bool'"); |
| 1595 | |
Guido van Rossum | 4dfe8a1 | 2006-04-22 23:28:04 +0000 | [diff] [blame] | 1596 | if (PyType_Ready(&PyBytes_Type) < 0) |
| 1597 | Py_FatalError("Can't initialize 'bytes'"); |
| 1598 | |
Guido van Rossum | cacfc07 | 2002-05-24 19:01:59 +0000 | [diff] [blame] | 1599 | if (PyType_Ready(&PyString_Type) < 0) |
| 1600 | Py_FatalError("Can't initialize 'str'"); |
| 1601 | |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1602 | if (PyType_Ready(&PyList_Type) < 0) |
| 1603 | Py_FatalError("Can't initialize 'list'"); |
| 1604 | |
| 1605 | if (PyType_Ready(&PyNone_Type) < 0) |
| 1606 | Py_FatalError("Can't initialize type(None)"); |
| 1607 | |
Guido van Rossum | 50e9fb9 | 2006-08-17 05:42:55 +0000 | [diff] [blame] | 1608 | if (PyType_Ready(Py_Ellipsis->ob_type) < 0) |
| 1609 | Py_FatalError("Can't initialize type(Ellipsis)"); |
| 1610 | |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1611 | if (PyType_Ready(&PyNotImplemented_Type) < 0) |
| 1612 | Py_FatalError("Can't initialize type(NotImplemented)"); |
Guido van Rossum | 47b9ff6 | 2006-08-24 00:41:19 +0000 | [diff] [blame] | 1613 | |
| 1614 | if (PyType_Ready(&PyCode_Type) < 0) |
| 1615 | Py_FatalError("Can't initialize 'code'"); |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1616 | } |
| 1617 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1618 | |
Guido van Rossum | 84a9032 | 1996-05-22 16:34:47 +0000 | [diff] [blame] | 1619 | #ifdef Py_TRACE_REFS |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1620 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 1621 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1622 | _Py_NewReference(PyObject *op) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1623 | { |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 1624 | _Py_INC_REFTOTAL; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1625 | op->ob_refcnt = 1; |
Tim Peters | 7571a0f | 2003-03-23 17:52:28 +0000 | [diff] [blame] | 1626 | _Py_AddToAllObjects(op, 1); |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 1627 | _Py_INC_TPALLOCS(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1628 | } |
| 1629 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 1630 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1631 | _Py_ForgetReference(register PyObject *op) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1632 | { |
Guido van Rossum | bffd683 | 2000-01-20 22:32:56 +0000 | [diff] [blame] | 1633 | #ifdef SLOW_UNREF_CHECK |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 1634 | register PyObject *p; |
Guido van Rossum | bffd683 | 2000-01-20 22:32:56 +0000 | [diff] [blame] | 1635 | #endif |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1636 | if (op->ob_refcnt < 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1637 | Py_FatalError("UNREF negative refcnt"); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 1638 | if (op == &refchain || |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1639 | op->_ob_prev->_ob_next != op || op->_ob_next->_ob_prev != op) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1640 | Py_FatalError("UNREF invalid object"); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 1641 | #ifdef SLOW_UNREF_CHECK |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1642 | for (p = refchain._ob_next; p != &refchain; p = p->_ob_next) { |
| 1643 | if (p == op) |
| 1644 | break; |
| 1645 | } |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1646 | if (p == &refchain) /* Not found */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1647 | Py_FatalError("UNREF unknown object"); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 1648 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1649 | op->_ob_next->_ob_prev = op->_ob_prev; |
| 1650 | op->_ob_prev->_ob_next = op->_ob_next; |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 1651 | op->_ob_next = op->_ob_prev = NULL; |
Tim Peters | 3459251 | 2002-07-11 06:23:50 +0000 | [diff] [blame] | 1652 | _Py_INC_TPFREES(op); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1653 | } |
| 1654 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 1655 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1656 | _Py_Dealloc(PyObject *op) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1657 | { |
Guido van Rossum | 9776adf | 1994-09-07 14:36:45 +0000 | [diff] [blame] | 1658 | destructor dealloc = op->ob_type->tp_dealloc; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1659 | _Py_ForgetReference(op); |
Guido van Rossum | 9776adf | 1994-09-07 14:36:45 +0000 | [diff] [blame] | 1660 | (*dealloc)(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1661 | } |
| 1662 | |
Tim Peters | 269b2a6 | 2003-04-17 19:52:29 +0000 | [diff] [blame] | 1663 | /* Print all live objects. Because PyObject_Print is called, the |
| 1664 | * interpreter must be in a healthy state. |
| 1665 | */ |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 1666 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1667 | _Py_PrintReferences(FILE *fp) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1668 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1669 | PyObject *op; |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1670 | fprintf(fp, "Remaining objects:\n"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1671 | for (op = refchain._ob_next; op != &refchain; op = op->_ob_next) { |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1672 | fprintf(fp, "%p [%" PY_FORMAT_SIZE_T "d] ", op, op->ob_refcnt); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1673 | if (PyObject_Print(op, fp, 0) != 0) |
| 1674 | PyErr_Clear(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1675 | putc('\n', fp); |
| 1676 | } |
| 1677 | } |
| 1678 | |
Tim Peters | 269b2a6 | 2003-04-17 19:52:29 +0000 | [diff] [blame] | 1679 | /* Print the addresses of all live objects. Unlike _Py_PrintReferences, this |
| 1680 | * doesn't make any calls to the Python C API, so is always safe to call. |
| 1681 | */ |
| 1682 | void |
| 1683 | _Py_PrintReferenceAddresses(FILE *fp) |
| 1684 | { |
| 1685 | PyObject *op; |
| 1686 | fprintf(fp, "Remaining object addresses:\n"); |
| 1687 | for (op = refchain._ob_next; op != &refchain; op = op->_ob_next) |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1688 | fprintf(fp, "%p [%" PY_FORMAT_SIZE_T "d] %s\n", op, |
| 1689 | op->ob_refcnt, op->ob_type->tp_name); |
Tim Peters | 269b2a6 | 2003-04-17 19:52:29 +0000 | [diff] [blame] | 1690 | } |
| 1691 | |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 1692 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1693 | _Py_GetObjects(PyObject *self, PyObject *args) |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 1694 | { |
| 1695 | int i, n; |
| 1696 | PyObject *t = NULL; |
| 1697 | PyObject *res, *op; |
| 1698 | |
| 1699 | if (!PyArg_ParseTuple(args, "i|O", &n, &t)) |
| 1700 | return NULL; |
| 1701 | op = refchain._ob_next; |
| 1702 | res = PyList_New(0); |
| 1703 | if (res == NULL) |
| 1704 | return NULL; |
| 1705 | for (i = 0; (n == 0 || i < n) && op != &refchain; i++) { |
| 1706 | while (op == self || op == args || op == res || op == t || |
Guido van Rossum | 3c29602 | 2001-07-14 17:58:00 +0000 | [diff] [blame] | 1707 | (t != NULL && op->ob_type != (PyTypeObject *) t)) { |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 1708 | op = op->_ob_next; |
| 1709 | if (op == &refchain) |
| 1710 | return res; |
| 1711 | } |
| 1712 | if (PyList_Append(res, op) < 0) { |
| 1713 | Py_DECREF(res); |
| 1714 | return NULL; |
| 1715 | } |
| 1716 | op = op->_ob_next; |
| 1717 | } |
| 1718 | return res; |
| 1719 | } |
| 1720 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1721 | #endif |
Guido van Rossum | 97ead3f | 1996-01-12 01:24:09 +0000 | [diff] [blame] | 1722 | |
| 1723 | |
| 1724 | /* Hack to force loading of cobject.o */ |
Guido van Rossum | da9c271 | 1996-12-05 21:58:58 +0000 | [diff] [blame] | 1725 | PyTypeObject *_Py_cobject_hack = &PyCObject_Type; |
Guido van Rossum | 84a9032 | 1996-05-22 16:34:47 +0000 | [diff] [blame] | 1726 | |
| 1727 | |
| 1728 | /* Hack to force loading of abstract.o */ |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1729 | Py_ssize_t (*_Py_abstract_hack)(PyObject *) = PyObject_Size; |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1730 | |
| 1731 | |
Andrew M. Kuchling | 1582a3a | 2000-08-16 12:27:23 +0000 | [diff] [blame] | 1732 | /* Python's malloc wrappers (see pymem.h) */ |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1733 | |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 1734 | void * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1735 | PyMem_Malloc(size_t nbytes) |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1736 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1737 | return PyMem_MALLOC(nbytes); |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1738 | } |
| 1739 | |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 1740 | void * |
| 1741 | PyMem_Realloc(void *p, size_t nbytes) |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1742 | { |
Tim Peters | af3e8de | 2002-04-12 07:22:56 +0000 | [diff] [blame] | 1743 | return PyMem_REALLOC(p, nbytes); |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1744 | } |
| 1745 | |
| 1746 | void |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 1747 | PyMem_Free(void *p) |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1748 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1749 | PyMem_FREE(p); |
| 1750 | } |
| 1751 | |
| 1752 | |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1753 | /* These methods are used to control infinite recursion in repr, str, print, |
| 1754 | etc. Container objects that may recursively contain themselves, |
| 1755 | e.g. builtin dictionaries and lists, should used Py_ReprEnter() and |
| 1756 | Py_ReprLeave() to avoid infinite recursion. |
| 1757 | |
| 1758 | Py_ReprEnter() returns 0 the first time it is called for a particular |
| 1759 | object and 1 every time thereafter. It returns -1 if an exception |
| 1760 | occurred. Py_ReprLeave() has no return value. |
| 1761 | |
| 1762 | See dictobject.c and listobject.c for examples of use. |
| 1763 | */ |
| 1764 | |
| 1765 | #define KEY "Py_Repr" |
| 1766 | |
| 1767 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1768 | Py_ReprEnter(PyObject *obj) |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1769 | { |
| 1770 | PyObject *dict; |
| 1771 | PyObject *list; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1772 | Py_ssize_t i; |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1773 | |
| 1774 | dict = PyThreadState_GetDict(); |
| 1775 | if (dict == NULL) |
Guido van Rossum | 0fc8f00 | 2003-04-15 15:12:39 +0000 | [diff] [blame] | 1776 | return 0; |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1777 | list = PyDict_GetItemString(dict, KEY); |
| 1778 | if (list == NULL) { |
| 1779 | list = PyList_New(0); |
| 1780 | if (list == NULL) |
| 1781 | return -1; |
| 1782 | if (PyDict_SetItemString(dict, KEY, list) < 0) |
| 1783 | return -1; |
| 1784 | Py_DECREF(list); |
| 1785 | } |
| 1786 | i = PyList_GET_SIZE(list); |
| 1787 | while (--i >= 0) { |
| 1788 | if (PyList_GET_ITEM(list, i) == obj) |
| 1789 | return 1; |
| 1790 | } |
| 1791 | PyList_Append(list, obj); |
| 1792 | return 0; |
| 1793 | } |
| 1794 | |
| 1795 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1796 | Py_ReprLeave(PyObject *obj) |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1797 | { |
| 1798 | PyObject *dict; |
| 1799 | PyObject *list; |
Martin v. Löwis | 18e1655 | 2006-02-15 17:27:45 +0000 | [diff] [blame] | 1800 | Py_ssize_t i; |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1801 | |
| 1802 | dict = PyThreadState_GetDict(); |
Guido van Rossum | eb90946 | 1998-04-11 15:17:34 +0000 | [diff] [blame] | 1803 | if (dict == NULL) |
| 1804 | return; |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1805 | list = PyDict_GetItemString(dict, KEY); |
Guido van Rossum | eb90946 | 1998-04-11 15:17:34 +0000 | [diff] [blame] | 1806 | if (list == NULL || !PyList_Check(list)) |
| 1807 | return; |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1808 | i = PyList_GET_SIZE(list); |
| 1809 | /* Count backwards because we always expect obj to be list[-1] */ |
| 1810 | while (--i >= 0) { |
| 1811 | if (PyList_GET_ITEM(list, i) == obj) { |
| 1812 | PyList_SetSlice(list, i, i + 1, NULL); |
| 1813 | break; |
| 1814 | } |
| 1815 | } |
| 1816 | } |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1817 | |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1818 | /* Trashcan support. */ |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1819 | |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1820 | /* Current call-stack depth of tp_dealloc calls. */ |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1821 | int _PyTrash_delete_nesting = 0; |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1822 | |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1823 | /* List of objects that still need to be cleaned up, singly linked via their |
| 1824 | * gc headers' gc_prev pointers. |
| 1825 | */ |
| 1826 | PyObject *_PyTrash_delete_later = NULL; |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1827 | |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1828 | /* Add op to the _PyTrash_delete_later list. Called when the current |
| 1829 | * call-stack depth gets large. op must be a currently untracked gc'ed |
| 1830 | * object, with refcount 0. Py_DECREF must already have been called on it. |
| 1831 | */ |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1832 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1833 | _PyTrash_deposit_object(PyObject *op) |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1834 | { |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1835 | assert(PyObject_IS_GC(op)); |
| 1836 | assert(_Py_AS_GC(op)->gc.gc_refs == _PyGC_REFS_UNTRACKED); |
| 1837 | assert(op->ob_refcnt == 0); |
Neil Schemenauer | f589c05 | 2002-03-29 03:05:54 +0000 | [diff] [blame] | 1838 | _Py_AS_GC(op)->gc.gc_prev = (PyGC_Head *)_PyTrash_delete_later; |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1839 | _PyTrash_delete_later = op; |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1840 | } |
| 1841 | |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1842 | /* Dealloccate all the objects in the _PyTrash_delete_later list. Called when |
| 1843 | * the call-stack unwinds again. |
| 1844 | */ |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1845 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1846 | _PyTrash_destroy_chain(void) |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1847 | { |
| 1848 | while (_PyTrash_delete_later) { |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1849 | PyObject *op = _PyTrash_delete_later; |
| 1850 | destructor dealloc = op->ob_type->tp_dealloc; |
Neil Schemenauer | f589c05 | 2002-03-29 03:05:54 +0000 | [diff] [blame] | 1851 | |
Neil Schemenauer | f589c05 | 2002-03-29 03:05:54 +0000 | [diff] [blame] | 1852 | _PyTrash_delete_later = |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1853 | (PyObject*) _Py_AS_GC(op)->gc.gc_prev; |
Neil Schemenauer | f589c05 | 2002-03-29 03:05:54 +0000 | [diff] [blame] | 1854 | |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1855 | /* Call the deallocator directly. This used to try to |
| 1856 | * fool Py_DECREF into calling it indirectly, but |
| 1857 | * Py_DECREF was already called on this object, and in |
| 1858 | * assorted non-release builds calling Py_DECREF again ends |
| 1859 | * up distorting allocation statistics. |
| 1860 | */ |
| 1861 | assert(op->ob_refcnt == 0); |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1862 | ++_PyTrash_delete_nesting; |
Tim Peters | 803526b | 2002-07-07 05:13:56 +0000 | [diff] [blame] | 1863 | (*dealloc)(op); |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1864 | --_PyTrash_delete_nesting; |
| 1865 | } |
| 1866 | } |
Thomas Wouters | 49fd7fa | 2006-04-21 10:40:58 +0000 | [diff] [blame] | 1867 | |
| 1868 | #ifdef __cplusplus |
| 1869 | } |
| 1870 | #endif |