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 | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 5 | |
Jack Jansen | 28fc880 | 2000-07-11 21:47:20 +0000 | [diff] [blame] | 6 | #ifdef macintosh |
| 7 | #include "macglue.h" |
| 8 | #endif |
| 9 | |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 10 | /* just for trashcan: */ |
| 11 | #include "compile.h" |
| 12 | #include "frameobject.h" |
| 13 | #include "traceback.h" |
| 14 | |
Guido van Rossum | 6f9e433 | 1995-03-29 16:57:48 +0000 | [diff] [blame] | 15 | #if defined( Py_TRACE_REFS ) || defined( Py_REF_DEBUG ) |
Guido van Rossum | bffd683 | 2000-01-20 22:32:56 +0000 | [diff] [blame] | 16 | DL_IMPORT(long) _Py_RefTotal; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 17 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 18 | |
Guido van Rossum | 393661d | 2001-08-31 17:40:15 +0000 | [diff] [blame] | 19 | DL_IMPORT(int) Py_DivisionWarningFlag; |
| 20 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 21 | /* Object allocation routines used by NEWOBJ and NEWVAROBJ macros. |
| 22 | These are used by the individual routines for object creation. |
| 23 | Do not call them otherwise, they do not initialize the object! */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 24 | |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 25 | #ifdef COUNT_ALLOCS |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 26 | static PyTypeObject *type_list; |
Sjoerd Mullender | 842d2cc | 1993-10-15 16:18:48 +0000 | [diff] [blame] | 27 | extern int tuple_zero_allocs, fast_tuple_allocs; |
| 28 | extern int quick_int_allocs, quick_neg_int_allocs; |
Sjoerd Mullender | 3bb8a05 | 1993-10-22 12:04:32 +0000 | [diff] [blame] | 29 | extern int null_strings, one_strings; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 30 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 31 | dump_counts(void) |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 32 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 33 | PyTypeObject *tp; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 34 | |
| 35 | for (tp = type_list; tp; tp = tp->tp_next) |
Sjoerd Mullender | 52c1f51 | 1993-10-25 08:40:52 +0000 | [diff] [blame] | 36 | fprintf(stderr, "%s alloc'd: %d, freed: %d, max in use: %d\n", |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 37 | tp->tp_name, tp->tp_allocs, tp->tp_frees, |
Sjoerd Mullender | 52c1f51 | 1993-10-25 08:40:52 +0000 | [diff] [blame] | 38 | tp->tp_maxalloc); |
| 39 | fprintf(stderr, "fast tuple allocs: %d, empty: %d\n", |
| 40 | fast_tuple_allocs, tuple_zero_allocs); |
| 41 | fprintf(stderr, "fast int allocs: pos: %d, neg: %d\n", |
| 42 | quick_int_allocs, quick_neg_int_allocs); |
| 43 | fprintf(stderr, "null strings: %d, 1-strings: %d\n", |
| 44 | null_strings, one_strings); |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 45 | } |
| 46 | |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 47 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 48 | get_counts(void) |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 49 | { |
| 50 | PyTypeObject *tp; |
| 51 | PyObject *result; |
| 52 | PyObject *v; |
| 53 | |
| 54 | result = PyList_New(0); |
| 55 | if (result == NULL) |
| 56 | return NULL; |
| 57 | for (tp = type_list; tp; tp = tp->tp_next) { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 58 | v = Py_BuildValue("(siii)", tp->tp_name, tp->tp_allocs, |
| 59 | tp->tp_frees, tp->tp_maxalloc); |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 60 | if (v == NULL) { |
| 61 | Py_DECREF(result); |
| 62 | return NULL; |
| 63 | } |
| 64 | if (PyList_Append(result, v) < 0) { |
| 65 | Py_DECREF(v); |
| 66 | Py_DECREF(result); |
| 67 | return NULL; |
| 68 | } |
| 69 | Py_DECREF(v); |
| 70 | } |
| 71 | return result; |
| 72 | } |
| 73 | |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 74 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 75 | inc_count(PyTypeObject *tp) |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 76 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 77 | if (tp->tp_allocs == 0) { |
Guido van Rossum | d8953cb | 1995-04-06 14:46:26 +0000 | [diff] [blame] | 78 | /* first time; insert in linked list */ |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 79 | if (tp->tp_next != NULL) /* sanity check */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 80 | Py_FatalError("XXX inc_count sanity check"); |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 81 | tp->tp_next = type_list; |
| 82 | type_list = tp; |
| 83 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 84 | tp->tp_allocs++; |
| 85 | if (tp->tp_allocs - tp->tp_frees > tp->tp_maxalloc) |
| 86 | tp->tp_maxalloc = tp->tp_allocs - tp->tp_frees; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 87 | } |
| 88 | #endif |
| 89 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 90 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 91 | PyObject_Init(PyObject *op, PyTypeObject *tp) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 92 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 93 | if (op == NULL) { |
| 94 | PyErr_SetString(PyExc_SystemError, |
| 95 | "NULL object passed to PyObject_Init"); |
| 96 | return op; |
| 97 | } |
| 98 | /* Any changes should be reflected in PyObject_INIT (objimpl.h) */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 99 | op->ob_type = tp; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 100 | _Py_NewReference(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 101 | return op; |
| 102 | } |
| 103 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 104 | PyVarObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 105 | PyObject_InitVar(PyVarObject *op, PyTypeObject *tp, int size) |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 106 | { |
| 107 | if (op == NULL) { |
| 108 | PyErr_SetString(PyExc_SystemError, |
| 109 | "NULL object passed to PyObject_InitVar"); |
| 110 | return op; |
| 111 | } |
| 112 | /* Any changes should be reflected in PyObject_INIT_VAR */ |
| 113 | op->ob_size = size; |
| 114 | op->ob_type = tp; |
| 115 | _Py_NewReference((PyObject *)op); |
| 116 | return op; |
| 117 | } |
| 118 | |
| 119 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 120 | _PyObject_New(PyTypeObject *tp) |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 121 | { |
| 122 | PyObject *op; |
| 123 | op = (PyObject *) PyObject_MALLOC(_PyObject_SIZE(tp)); |
| 124 | if (op == NULL) |
| 125 | return PyErr_NoMemory(); |
| 126 | return PyObject_INIT(op, tp); |
| 127 | } |
| 128 | |
Guido van Rossum | d0c87ee | 1997-05-15 21:31:03 +0000 | [diff] [blame] | 129 | PyVarObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 130 | _PyObject_NewVar(PyTypeObject *tp, int size) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 131 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 132 | PyVarObject *op; |
| 133 | op = (PyVarObject *) PyObject_MALLOC(_PyObject_VAR_SIZE(tp, size)); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 134 | if (op == NULL) |
Guido van Rossum | d0c87ee | 1997-05-15 21:31:03 +0000 | [diff] [blame] | 135 | return (PyVarObject *)PyErr_NoMemory(); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 136 | return PyObject_INIT_VAR(op, tp, size); |
| 137 | } |
| 138 | |
| 139 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 140 | _PyObject_Del(PyObject *op) |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 141 | { |
Guido van Rossum | 4cc6ac7 | 2000-07-01 01:00:38 +0000 | [diff] [blame] | 142 | PyObject_FREE(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 143 | } |
| 144 | |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 145 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 146 | PyObject_Print(PyObject *op, FILE *fp, int flags) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 147 | { |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 148 | int ret = 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 149 | if (PyErr_CheckSignals()) |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 150 | return -1; |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 151 | #ifdef USE_STACKCHECK |
| 152 | if (PyOS_CheckStack()) { |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 153 | PyErr_SetString(PyExc_MemoryError, "stack overflow"); |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 154 | return -1; |
| 155 | } |
| 156 | #endif |
Guido van Rossum | 687ef6e | 2000-01-12 16:28:58 +0000 | [diff] [blame] | 157 | clearerr(fp); /* Clear any previous error condition */ |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 158 | if (op == NULL) { |
| 159 | fprintf(fp, "<nil>"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 160 | } |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 161 | else { |
| 162 | if (op->ob_refcnt <= 0) |
Fred Drake | a44d353 | 2000-06-30 15:01:00 +0000 | [diff] [blame] | 163 | fprintf(fp, "<refcnt %u at %p>", |
| 164 | op->ob_refcnt, op); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 165 | else if (op->ob_type->tp_print == NULL) { |
Guido van Rossum | 4f288ab | 2001-05-01 16:53:37 +0000 | [diff] [blame] | 166 | PyObject *s; |
| 167 | if (flags & Py_PRINT_RAW) |
| 168 | s = PyObject_Str(op); |
| 169 | else |
| 170 | s = PyObject_Repr(op); |
| 171 | if (s == NULL) |
| 172 | ret = -1; |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 173 | else { |
Guido van Rossum | 4f288ab | 2001-05-01 16:53:37 +0000 | [diff] [blame] | 174 | ret = PyObject_Print(s, fp, Py_PRINT_RAW); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 175 | } |
Guido van Rossum | 4f288ab | 2001-05-01 16:53:37 +0000 | [diff] [blame] | 176 | Py_XDECREF(s); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 177 | } |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 178 | else |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 179 | ret = (*op->ob_type->tp_print)(op, fp, flags); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 180 | } |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 181 | if (ret == 0) { |
| 182 | if (ferror(fp)) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 183 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 184 | clearerr(fp); |
| 185 | ret = -1; |
| 186 | } |
| 187 | } |
| 188 | return ret; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 189 | } |
| 190 | |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 191 | /* For debugging convenience. See Misc/gdbinit for some useful gdb hooks */ |
Barry Warsaw | bbd89b6 | 2001-01-24 04:18:13 +0000 | [diff] [blame] | 192 | void _PyObject_Dump(PyObject* op) |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 193 | { |
Barry Warsaw | eefb107 | 2001-02-22 22:39:18 +0000 | [diff] [blame] | 194 | if (op == NULL) |
| 195 | fprintf(stderr, "NULL\n"); |
| 196 | else { |
Guido van Rossum | 5f5512d | 2001-09-14 15:50:08 +0000 | [diff] [blame] | 197 | fprintf(stderr, "object : "); |
Barry Warsaw | eefb107 | 2001-02-22 22:39:18 +0000 | [diff] [blame] | 198 | (void)PyObject_Print(op, stderr, 0); |
Guido van Rossum | 5f5512d | 2001-09-14 15:50:08 +0000 | [diff] [blame] | 199 | fprintf(stderr, "\n" |
| 200 | "type : %s\n" |
| 201 | "refcount: %d\n" |
| 202 | "address : %p\n", |
| 203 | op->ob_type==NULL ? "NULL" : op->ob_type->tp_name, |
| 204 | op->ob_refcnt, |
| 205 | op); |
Barry Warsaw | eefb107 | 2001-02-22 22:39:18 +0000 | [diff] [blame] | 206 | } |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 207 | } |
Barry Warsaw | 903138f | 2001-01-23 16:33:18 +0000 | [diff] [blame] | 208 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 209 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 210 | PyObject_Repr(PyObject *v) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 211 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 212 | if (PyErr_CheckSignals()) |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 213 | return NULL; |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 214 | #ifdef USE_STACKCHECK |
| 215 | if (PyOS_CheckStack()) { |
Fred Drake | 661ea26 | 2000-10-24 19:57:45 +0000 | [diff] [blame] | 216 | PyErr_SetString(PyExc_MemoryError, "stack overflow"); |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 217 | return NULL; |
| 218 | } |
| 219 | #endif |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 220 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 221 | return PyString_FromString("<NULL>"); |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 222 | else if (v->ob_type->tp_repr == NULL) |
Guido van Rossum | 21922aa | 2001-08-30 20:26:05 +0000 | [diff] [blame] | 223 | return PyString_FromFormat("<%s object at %p>", |
Barry Warsaw | 7ce3694 | 2001-08-24 18:34:26 +0000 | [diff] [blame] | 224 | v->ob_type->tp_name, v); |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 225 | else { |
| 226 | PyObject *res; |
| 227 | res = (*v->ob_type->tp_repr)(v); |
| 228 | if (res == NULL) |
| 229 | return NULL; |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 230 | #ifdef Py_USING_UNICODE |
Fredrik Lundh | efecc7d | 2000-07-01 14:31:09 +0000 | [diff] [blame] | 231 | if (PyUnicode_Check(res)) { |
| 232 | PyObject* str; |
Fredrik Lundh | 2a1e060 | 2000-07-08 17:43:32 +0000 | [diff] [blame] | 233 | str = PyUnicode_AsUnicodeEscapeString(res); |
Marc-André Lemburg | 891bc65 | 2000-07-03 09:57:53 +0000 | [diff] [blame] | 234 | Py_DECREF(res); |
| 235 | if (str) |
Fredrik Lundh | efecc7d | 2000-07-01 14:31:09 +0000 | [diff] [blame] | 236 | res = str; |
Marc-André Lemburg | 891bc65 | 2000-07-03 09:57:53 +0000 | [diff] [blame] | 237 | else |
| 238 | return NULL; |
Fredrik Lundh | efecc7d | 2000-07-01 14:31:09 +0000 | [diff] [blame] | 239 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 240 | #endif |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 241 | if (!PyString_Check(res)) { |
| 242 | PyErr_Format(PyExc_TypeError, |
Guido van Rossum | 5db862d | 2000-04-10 12:46:51 +0000 | [diff] [blame] | 243 | "__repr__ returned non-string (type %.200s)", |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 244 | res->ob_type->tp_name); |
| 245 | Py_DECREF(res); |
| 246 | return NULL; |
| 247 | } |
| 248 | return res; |
| 249 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 250 | } |
| 251 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 252 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 253 | PyObject_Str(PyObject *v) |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 254 | { |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 255 | PyObject *res; |
| 256 | |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 257 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 258 | return PyString_FromString("<NULL>"); |
Tim Peters | 5a49ade | 2001-09-11 01:41:59 +0000 | [diff] [blame] | 259 | if (PyString_CheckExact(v)) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 260 | Py_INCREF(v); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 261 | return v; |
| 262 | } |
Tim Peters | 5a49ade | 2001-09-11 01:41:59 +0000 | [diff] [blame] | 263 | if (PyString_Check(v)) { |
| 264 | /* For a string subtype that's not a string, return a true |
| 265 | string with the same string data. */ |
| 266 | PyStringObject *s = (PyStringObject *)v; |
| 267 | return PyString_FromStringAndSize(s->ob_sval, s->ob_size); |
| 268 | } |
Guido van Rossum | 4f288ab | 2001-05-01 16:53:37 +0000 | [diff] [blame] | 269 | if (v->ob_type->tp_str == NULL) |
| 270 | return PyObject_Repr(v); |
| 271 | |
| 272 | res = (*v->ob_type->tp_str)(v); |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 273 | if (res == NULL) |
| 274 | return NULL; |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 275 | #ifdef Py_USING_UNICODE |
Marc-André Lemburg | 891bc65 | 2000-07-03 09:57:53 +0000 | [diff] [blame] | 276 | if (PyUnicode_Check(res)) { |
| 277 | PyObject* str; |
| 278 | str = PyUnicode_AsEncodedString(res, NULL, NULL); |
| 279 | Py_DECREF(res); |
| 280 | if (str) |
| 281 | res = str; |
| 282 | else |
| 283 | return NULL; |
| 284 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 285 | #endif |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 286 | if (!PyString_Check(res)) { |
| 287 | PyErr_Format(PyExc_TypeError, |
Guido van Rossum | 5db862d | 2000-04-10 12:46:51 +0000 | [diff] [blame] | 288 | "__str__ returned non-string (type %.200s)", |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 289 | res->ob_type->tp_name); |
| 290 | Py_DECREF(res); |
| 291 | return NULL; |
| 292 | } |
| 293 | return res; |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 294 | } |
| 295 | |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 296 | #ifdef Py_USING_UNICODE |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 297 | PyObject * |
| 298 | PyObject_Unicode(PyObject *v) |
| 299 | { |
| 300 | PyObject *res; |
| 301 | |
| 302 | if (v == NULL) |
| 303 | res = PyString_FromString("<NULL>"); |
| 304 | else if (PyUnicode_Check(v)) { |
| 305 | Py_INCREF(v); |
| 306 | return v; |
| 307 | } |
Marc-André Lemburg | ae60534 | 2001-03-25 19:16:13 +0000 | [diff] [blame] | 308 | else if (PyString_Check(v)) { |
| 309 | Py_INCREF(v); |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 310 | res = v; |
Marc-André Lemburg | ae60534 | 2001-03-25 19:16:13 +0000 | [diff] [blame] | 311 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 312 | else if (v->ob_type->tp_str != NULL) |
| 313 | res = (*v->ob_type->tp_str)(v); |
| 314 | else { |
| 315 | PyObject *func; |
| 316 | static PyObject *strstr; |
| 317 | if (strstr == NULL) { |
| 318 | strstr= PyString_InternFromString("__str__"); |
| 319 | if (strstr == NULL) |
| 320 | return NULL; |
| 321 | } |
| 322 | if (!PyInstance_Check(v) || |
| 323 | (func = PyObject_GetAttr(v, strstr)) == NULL) { |
| 324 | PyErr_Clear(); |
| 325 | res = PyObject_Repr(v); |
| 326 | } |
| 327 | else { |
| 328 | res = PyEval_CallObject(func, (PyObject *)NULL); |
| 329 | Py_DECREF(func); |
| 330 | } |
| 331 | } |
| 332 | if (res == NULL) |
| 333 | return NULL; |
| 334 | if (!PyUnicode_Check(res)) { |
| 335 | PyObject* str; |
| 336 | str = PyUnicode_FromObject(res); |
| 337 | Py_DECREF(res); |
| 338 | if (str) |
| 339 | res = str; |
| 340 | else |
| 341 | return NULL; |
| 342 | } |
| 343 | return res; |
| 344 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 345 | #endif |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 346 | |
| 347 | |
Guido van Rossum | d1f06b9 | 2001-01-24 22:14:43 +0000 | [diff] [blame] | 348 | /* Macro to get the tp_richcompare field of a type if defined */ |
| 349 | #define RICHCOMPARE(t) (PyType_HasFeature((t), Py_TPFLAGS_HAVE_RICHCOMPARE) \ |
| 350 | ? (t)->tp_richcompare : NULL) |
| 351 | |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 352 | /* Map rich comparison operators to their swapped version, e.g. LT --> GT */ |
| 353 | static int swapped_op[] = {Py_GT, Py_GE, Py_EQ, Py_NE, Py_LT, Py_LE}; |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 354 | |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 355 | /* Try a genuine rich comparison, returning an object. Return: |
| 356 | NULL for exception; |
| 357 | NotImplemented if this particular rich comparison is not implemented or |
| 358 | undefined; |
| 359 | some object not equal to NotImplemented if it is implemented |
| 360 | (this latter object may not be a Boolean). |
| 361 | */ |
| 362 | static PyObject * |
| 363 | try_rich_compare(PyObject *v, PyObject *w, int op) |
| 364 | { |
| 365 | richcmpfunc f; |
| 366 | PyObject *res; |
| 367 | |
Guido van Rossum | 2ed6bf8 | 2001-09-27 20:30:07 +0000 | [diff] [blame] | 368 | if (v->ob_type != w->ob_type && |
| 369 | PyType_IsSubtype(w->ob_type, v->ob_type) && |
| 370 | (f = RICHCOMPARE(w->ob_type)) != NULL) { |
| 371 | res = (*f)(w, v, swapped_op[op]); |
| 372 | if (res != Py_NotImplemented) |
| 373 | return res; |
| 374 | Py_DECREF(res); |
| 375 | } |
Guido van Rossum | d1f06b9 | 2001-01-24 22:14:43 +0000 | [diff] [blame] | 376 | if ((f = RICHCOMPARE(v->ob_type)) != NULL) { |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 377 | res = (*f)(v, w, op); |
| 378 | if (res != Py_NotImplemented) |
| 379 | return res; |
| 380 | Py_DECREF(res); |
| 381 | } |
Guido van Rossum | d1f06b9 | 2001-01-24 22:14:43 +0000 | [diff] [blame] | 382 | if ((f = RICHCOMPARE(w->ob_type)) != NULL) { |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 383 | return (*f)(w, v, swapped_op[op]); |
| 384 | } |
| 385 | res = Py_NotImplemented; |
| 386 | Py_INCREF(res); |
| 387 | return res; |
| 388 | } |
| 389 | |
| 390 | /* Try a genuine rich comparison, returning an int. Return: |
| 391 | -1 for exception (including the case where try_rich_compare() returns an |
| 392 | object that's not a Boolean); |
| 393 | 0 if the outcome is false; |
| 394 | 1 if the outcome is true; |
| 395 | 2 if this particular rich comparison is not implemented or undefined. |
| 396 | */ |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 397 | static int |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 398 | try_rich_compare_bool(PyObject *v, PyObject *w, int op) |
| 399 | { |
| 400 | PyObject *res; |
| 401 | int ok; |
| 402 | |
Guido van Rossum | d1f06b9 | 2001-01-24 22:14:43 +0000 | [diff] [blame] | 403 | if (RICHCOMPARE(v->ob_type) == NULL && RICHCOMPARE(w->ob_type) == NULL) |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 404 | return 2; /* Shortcut, avoid INCREF+DECREF */ |
| 405 | res = try_rich_compare(v, w, op); |
| 406 | if (res == NULL) |
| 407 | return -1; |
| 408 | if (res == Py_NotImplemented) { |
| 409 | Py_DECREF(res); |
| 410 | return 2; |
| 411 | } |
| 412 | ok = PyObject_IsTrue(res); |
| 413 | Py_DECREF(res); |
| 414 | return ok; |
| 415 | } |
| 416 | |
| 417 | /* Try rich comparisons to determine a 3-way comparison. Return: |
| 418 | -2 for an exception; |
| 419 | -1 if v < w; |
| 420 | 0 if v == w; |
| 421 | 1 if v > w; |
| 422 | 2 if this particular rich comparison is not implemented or undefined. |
| 423 | */ |
| 424 | static int |
| 425 | try_rich_to_3way_compare(PyObject *v, PyObject *w) |
| 426 | { |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 427 | static struct { int op; int outcome; } tries[3] = { |
| 428 | /* Try this operator, and if it is true, use this outcome: */ |
| 429 | {Py_EQ, 0}, |
| 430 | {Py_LT, -1}, |
| 431 | {Py_GT, 1}, |
| 432 | }; |
| 433 | int i; |
| 434 | |
Guido van Rossum | d1f06b9 | 2001-01-24 22:14:43 +0000 | [diff] [blame] | 435 | if (RICHCOMPARE(v->ob_type) == NULL && RICHCOMPARE(w->ob_type) == NULL) |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 436 | return 2; /* Shortcut */ |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 437 | |
| 438 | for (i = 0; i < 3; i++) { |
| 439 | switch (try_rich_compare_bool(v, w, tries[i].op)) { |
| 440 | case -1: |
Tim Peters | 6d60b2e | 2001-05-07 20:53:51 +0000 | [diff] [blame] | 441 | return -2; |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 442 | case 1: |
| 443 | return tries[i].outcome; |
| 444 | } |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 445 | } |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 446 | |
| 447 | return 2; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 448 | } |
| 449 | |
| 450 | /* Try a 3-way comparison, returning an int. Return: |
| 451 | -2 for an exception; |
| 452 | -1 if v < w; |
| 453 | 0 if v == w; |
| 454 | 1 if v > w; |
| 455 | 2 if this particular 3-way comparison is not implemented or undefined. |
| 456 | */ |
| 457 | static int |
| 458 | try_3way_compare(PyObject *v, PyObject *w) |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 459 | { |
| 460 | int c; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 461 | cmpfunc f; |
| 462 | |
| 463 | /* Comparisons involving instances are given to instance_compare, |
| 464 | which has the same return conventions as this function. */ |
| 465 | |
Guido van Rossum | ab3b034 | 2001-09-18 20:38:53 +0000 | [diff] [blame] | 466 | f = v->ob_type->tp_compare; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 467 | if (PyInstance_Check(v)) |
Guido van Rossum | ab3b034 | 2001-09-18 20:38:53 +0000 | [diff] [blame] | 468 | return (*f)(v, w); |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 469 | if (PyInstance_Check(w)) |
| 470 | return (*w->ob_type->tp_compare)(v, w); |
| 471 | |
Guido van Rossum | ab3b034 | 2001-09-18 20:38:53 +0000 | [diff] [blame] | 472 | /* If both have the same (non-NULL) tp_compare, use it. */ |
| 473 | if (f != NULL && f == w->ob_type->tp_compare) { |
| 474 | c = (*f)(v, w); |
| 475 | if (c < 0 && PyErr_Occurred()) |
| 476 | return -1; |
| 477 | return c < 0 ? -1 : c > 0 ? 1 : 0; |
| 478 | } |
| 479 | |
| 480 | /* If either tp_compare is _PyObject_SlotCompare, that's safe. */ |
| 481 | if (f == _PyObject_SlotCompare || |
| 482 | w->ob_type->tp_compare == _PyObject_SlotCompare) |
| 483 | return _PyObject_SlotCompare(v, w); |
| 484 | |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 485 | /* Try coercion; if it fails, give up */ |
| 486 | c = PyNumber_CoerceEx(&v, &w); |
| 487 | if (c < 0) |
| 488 | return -2; |
| 489 | if (c > 0) |
| 490 | return 2; |
| 491 | |
| 492 | /* Try v's comparison, if defined */ |
| 493 | if ((f = v->ob_type->tp_compare) != NULL) { |
| 494 | c = (*f)(v, w); |
| 495 | Py_DECREF(v); |
| 496 | Py_DECREF(w); |
Martin v. Löwis | 0163d6d | 2001-06-09 07:34:05 +0000 | [diff] [blame] | 497 | if (c < 0 && PyErr_Occurred()) |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 498 | return -2; |
| 499 | return c < 0 ? -1 : c > 0 ? 1 : 0; |
| 500 | } |
| 501 | |
| 502 | /* Try w's comparison, if defined */ |
| 503 | if ((f = w->ob_type->tp_compare) != NULL) { |
| 504 | c = (*f)(w, v); /* swapped! */ |
| 505 | Py_DECREF(v); |
| 506 | Py_DECREF(w); |
Martin v. Löwis | 0163d6d | 2001-06-09 07:34:05 +0000 | [diff] [blame] | 507 | if (c < 0 && PyErr_Occurred()) |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 508 | return -2; |
| 509 | return c < 0 ? 1 : c > 0 ? -1 : 0; /* negated! */ |
| 510 | } |
| 511 | |
| 512 | /* No comparison defined */ |
| 513 | Py_DECREF(v); |
| 514 | Py_DECREF(w); |
| 515 | return 2; |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 516 | } |
| 517 | |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 518 | /* Final fallback 3-way comparison, returning an int. Return: |
| 519 | -2 if an error occurred; |
| 520 | -1 if v < w; |
| 521 | 0 if v == w; |
| 522 | 1 if v > w. |
| 523 | */ |
| 524 | static int |
| 525 | default_3way_compare(PyObject *v, PyObject *w) |
| 526 | { |
| 527 | int c; |
Guido van Rossum | 8f9143d | 2001-01-22 15:59:32 +0000 | [diff] [blame] | 528 | char *vname, *wname; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 529 | |
| 530 | if (v->ob_type == w->ob_type) { |
Barry Warsaw | b0e754d | 2001-01-20 06:24:55 +0000 | [diff] [blame] | 531 | /* When comparing these pointers, they must be cast to |
| 532 | * integer types (i.e. Py_uintptr_t, our spelling of C9X's |
| 533 | * uintptr_t). ANSI specifies that pointer compares other |
| 534 | * than == and != to non-related structures are undefined. |
| 535 | */ |
Barry Warsaw | 71ff8d5 | 2001-01-20 06:08:10 +0000 | [diff] [blame] | 536 | Py_uintptr_t vv = (Py_uintptr_t)v; |
| 537 | Py_uintptr_t ww = (Py_uintptr_t)w; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 538 | return (vv < ww) ? -1 : (vv > ww) ? 1 : 0; |
| 539 | } |
| 540 | |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 541 | #ifdef Py_USING_UNICODE |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 542 | /* Special case for Unicode */ |
| 543 | if (PyUnicode_Check(v) || PyUnicode_Check(w)) { |
| 544 | c = PyUnicode_Compare(v, w); |
| 545 | if (!PyErr_Occurred()) |
| 546 | return c; |
| 547 | /* TypeErrors are ignored: if Unicode coercion fails due |
| 548 | to one of the arguments not having the right type, we |
| 549 | continue as defined by the coercion protocol (see |
| 550 | above). Luckily, decoding errors are reported as |
| 551 | ValueErrors and are not masked by this technique. */ |
| 552 | if (!PyErr_ExceptionMatches(PyExc_TypeError)) |
| 553 | return -2; |
| 554 | PyErr_Clear(); |
| 555 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 556 | #endif |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 557 | |
Guido van Rossum | 0871e93 | 2001-01-22 19:28:09 +0000 | [diff] [blame] | 558 | /* None is smaller than anything */ |
| 559 | if (v == Py_None) |
| 560 | return -1; |
| 561 | if (w == Py_None) |
| 562 | return 1; |
| 563 | |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 564 | /* different type: compare type names */ |
Guido van Rossum | 8f9143d | 2001-01-22 15:59:32 +0000 | [diff] [blame] | 565 | if (v->ob_type->tp_as_number) |
| 566 | vname = ""; |
| 567 | else |
| 568 | vname = v->ob_type->tp_name; |
| 569 | if (w->ob_type->tp_as_number) |
| 570 | wname = ""; |
| 571 | else |
| 572 | wname = w->ob_type->tp_name; |
| 573 | c = strcmp(vname, wname); |
| 574 | if (c < 0) |
| 575 | return -1; |
| 576 | if (c > 0) |
| 577 | return 1; |
| 578 | /* Same type name, or (more likely) incomparable numeric types */ |
| 579 | return ((Py_uintptr_t)(v->ob_type) < ( |
| 580 | Py_uintptr_t)(w->ob_type)) ? -1 : 1; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 581 | } |
| 582 | |
| 583 | #define CHECK_TYPES(o) PyType_HasFeature((o)->ob_type, Py_TPFLAGS_CHECKTYPES) |
| 584 | |
Tim Peters | 6d60b2e | 2001-05-07 20:53:51 +0000 | [diff] [blame] | 585 | /* Do a 3-way comparison, by hook or by crook. Return: |
| 586 | -2 for an exception; |
| 587 | -1 if v < w; |
| 588 | 0 if v == w; |
| 589 | 1 if v > w; |
Martin v. Löwis | 0163d6d | 2001-06-09 07:34:05 +0000 | [diff] [blame] | 590 | If the object implements a tp_compare function, it returns |
| 591 | whatever this function returns (whether with an exception or not). |
Tim Peters | 6d60b2e | 2001-05-07 20:53:51 +0000 | [diff] [blame] | 592 | */ |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 593 | static int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 594 | do_cmp(PyObject *v, PyObject *w) |
Guido van Rossum | 2056684 | 1995-01-12 11:26:10 +0000 | [diff] [blame] | 595 | { |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 596 | int c; |
Martin v. Löwis | 0163d6d | 2001-06-09 07:34:05 +0000 | [diff] [blame] | 597 | cmpfunc f; |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 598 | |
Martin v. Löwis | 0163d6d | 2001-06-09 07:34:05 +0000 | [diff] [blame] | 599 | if (v->ob_type == w->ob_type |
Guido van Rossum | 82fc51c | 2001-08-16 08:02:45 +0000 | [diff] [blame] | 600 | && (f = v->ob_type->tp_compare) != NULL) { |
| 601 | c = (*f)(v, w); |
| 602 | if (c != 2 || !PyInstance_Check(v)) |
| 603 | return c; |
| 604 | } |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 605 | c = try_rich_to_3way_compare(v, w); |
| 606 | if (c < 2) |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 607 | return c; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 608 | c = try_3way_compare(v, w); |
| 609 | if (c < 2) |
| 610 | return c; |
| 611 | return default_3way_compare(v, w); |
Guido van Rossum | 2056684 | 1995-01-12 11:26:10 +0000 | [diff] [blame] | 612 | } |
| 613 | |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 614 | /* compare_nesting is incremented before calling compare (for |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 615 | some types) and decremented on exit. If the count exceeds the |
| 616 | nesting limit, enable code to detect circular data structures. |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 617 | |
| 618 | This is a tunable parameter that should only affect the performance |
| 619 | of comparisons, nothing else. Setting it high makes comparing deeply |
| 620 | nested non-cyclical data structures faster, but makes comparing cyclical |
| 621 | data structures slower. |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 622 | */ |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 623 | #define NESTING_LIMIT 20 |
| 624 | |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 625 | static int compare_nesting = 0; |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 626 | |
| 627 | static PyObject* |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 628 | get_inprogress_dict(void) |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 629 | { |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 630 | static PyObject *key; |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 631 | PyObject *tstate_dict, *inprogress; |
| 632 | |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 633 | if (key == NULL) { |
| 634 | key = PyString_InternFromString("cmp_state"); |
| 635 | if (key == NULL) |
| 636 | return NULL; |
| 637 | } |
| 638 | |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 639 | tstate_dict = PyThreadState_GetDict(); |
| 640 | if (tstate_dict == NULL) { |
| 641 | PyErr_BadInternalCall(); |
| 642 | return NULL; |
| 643 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 644 | |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 645 | inprogress = PyDict_GetItem(tstate_dict, key); |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 646 | if (inprogress == NULL) { |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 647 | inprogress = PyDict_New(); |
| 648 | if (inprogress == NULL) |
| 649 | return NULL; |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 650 | if (PyDict_SetItem(tstate_dict, key, inprogress) == -1) { |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 651 | Py_DECREF(inprogress); |
| 652 | return NULL; |
| 653 | } |
Jeremy Hylton | a251ea0 | 2000-06-09 16:20:39 +0000 | [diff] [blame] | 654 | Py_DECREF(inprogress); |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 655 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 656 | |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 657 | return inprogress; |
| 658 | } |
| 659 | |
| 660 | static PyObject * |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 661 | check_recursion(PyObject *v, PyObject *w, int op) |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 662 | { |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 663 | PyObject *inprogress; |
| 664 | PyObject *token; |
Barry Warsaw | 9d23a4e | 2000-08-18 05:01:19 +0000 | [diff] [blame] | 665 | Py_uintptr_t iv = (Py_uintptr_t)v; |
| 666 | Py_uintptr_t iw = (Py_uintptr_t)w; |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 667 | PyObject *x, *y, *z; |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 668 | |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 669 | inprogress = get_inprogress_dict(); |
| 670 | if (inprogress == NULL) |
| 671 | return NULL; |
| 672 | |
| 673 | token = PyTuple_New(3); |
| 674 | if (token == NULL) |
| 675 | return NULL; |
| 676 | |
| 677 | if (iv <= iw) { |
| 678 | PyTuple_SET_ITEM(token, 0, x = PyLong_FromVoidPtr((void *)v)); |
| 679 | PyTuple_SET_ITEM(token, 1, y = PyLong_FromVoidPtr((void *)w)); |
| 680 | if (op >= 0) |
| 681 | op = swapped_op[op]; |
| 682 | } else { |
| 683 | PyTuple_SET_ITEM(token, 0, x = PyLong_FromVoidPtr((void *)w)); |
| 684 | PyTuple_SET_ITEM(token, 1, y = PyLong_FromVoidPtr((void *)v)); |
| 685 | } |
| 686 | PyTuple_SET_ITEM(token, 2, z = PyInt_FromLong((long)op)); |
| 687 | if (x == NULL || y == NULL || z == NULL) { |
| 688 | Py_DECREF(token); |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 689 | return NULL; |
| 690 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 691 | |
| 692 | if (PyDict_GetItem(inprogress, token) != NULL) { |
| 693 | Py_DECREF(token); |
| 694 | return Py_None; /* Without INCREF! */ |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 695 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 696 | |
| 697 | if (PyDict_SetItem(inprogress, token, token) < 0) { |
| 698 | Py_DECREF(token); |
| 699 | return NULL; |
| 700 | } |
| 701 | |
| 702 | return token; |
| 703 | } |
| 704 | |
| 705 | static void |
| 706 | delete_token(PyObject *token) |
| 707 | { |
| 708 | PyObject *inprogress; |
| 709 | |
| 710 | if (token == NULL || token == Py_None) |
| 711 | return; |
| 712 | inprogress = get_inprogress_dict(); |
| 713 | if (inprogress == NULL) |
| 714 | PyErr_Clear(); |
| 715 | else |
| 716 | PyDict_DelItem(inprogress, token); |
| 717 | Py_DECREF(token); |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 718 | } |
| 719 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 720 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 721 | PyObject_Compare(PyObject *v, PyObject *w) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 722 | { |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 723 | PyTypeObject *vtp; |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 724 | int result; |
| 725 | |
Jack Jansen | d49cbe1 | 2000-08-22 21:52:51 +0000 | [diff] [blame] | 726 | #if defined(USE_STACKCHECK) |
Guido van Rossum | 9c0a99e | 2000-08-30 15:53:50 +0000 | [diff] [blame] | 727 | if (PyOS_CheckStack()) { |
Jack Jansen | d49cbe1 | 2000-08-22 21:52:51 +0000 | [diff] [blame] | 728 | PyErr_SetString(PyExc_MemoryError, "Stack overflow"); |
| 729 | return -1; |
| 730 | } |
| 731 | #endif |
Guido van Rossum | c8b6df9 | 1997-05-23 00:06:51 +0000 | [diff] [blame] | 732 | if (v == NULL || w == NULL) { |
| 733 | PyErr_BadInternalCall(); |
| 734 | return -1; |
| 735 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 736 | if (v == w) |
| 737 | return 0; |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 738 | vtp = v->ob_type; |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 739 | compare_nesting++; |
| 740 | if (compare_nesting > NESTING_LIMIT && |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 741 | (vtp->tp_as_mapping |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 742 | || (vtp->tp_as_sequence |
| 743 | && !PyString_Check(v) |
| 744 | && !PyTuple_Check(v)))) { |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 745 | /* try to detect circular data structures */ |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 746 | PyObject *token = check_recursion(v, w, -1); |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 747 | |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 748 | if (token == NULL) { |
| 749 | result = -1; |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 750 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 751 | else if (token == Py_None) { |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 752 | /* already comparing these objects. assume |
| 753 | they're equal until shown otherwise */ |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 754 | result = 0; |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 755 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 756 | else { |
| 757 | result = do_cmp(v, w); |
| 758 | delete_token(token); |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 759 | } |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 760 | } |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 761 | else { |
| 762 | result = do_cmp(v, w); |
| 763 | } |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 764 | compare_nesting--; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 765 | return result < 0 ? -1 : result; |
| 766 | } |
| 767 | |
| 768 | static PyObject * |
Martin v. Löwis | 0163d6d | 2001-06-09 07:34:05 +0000 | [diff] [blame] | 769 | convert_3way_to_object(int op, int c) |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 770 | { |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 771 | PyObject *result; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 772 | switch (op) { |
| 773 | case Py_LT: c = c < 0; break; |
| 774 | case Py_LE: c = c <= 0; break; |
| 775 | case Py_EQ: c = c == 0; break; |
| 776 | case Py_NE: c = c != 0; break; |
| 777 | case Py_GT: c = c > 0; break; |
| 778 | case Py_GE: c = c >= 0; break; |
| 779 | } |
| 780 | result = c ? Py_True : Py_False; |
| 781 | Py_INCREF(result); |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 782 | return result; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 783 | } |
Martin v. Löwis | 0163d6d | 2001-06-09 07:34:05 +0000 | [diff] [blame] | 784 | |
| 785 | |
| 786 | static PyObject * |
| 787 | try_3way_to_rich_compare(PyObject *v, PyObject *w, int op) |
| 788 | { |
| 789 | int c; |
| 790 | |
| 791 | c = try_3way_compare(v, w); |
| 792 | if (c >= 2) |
| 793 | c = default_3way_compare(v, w); |
| 794 | if (c <= -2) |
| 795 | return NULL; |
| 796 | return convert_3way_to_object(op, c); |
| 797 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 798 | |
Neil Schemenauer | d38855c | 2001-01-21 16:25:18 +0000 | [diff] [blame] | 799 | static PyObject * |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 800 | do_richcmp(PyObject *v, PyObject *w, int op) |
| 801 | { |
| 802 | PyObject *res; |
Martin v. Löwis | 0163d6d | 2001-06-09 07:34:05 +0000 | [diff] [blame] | 803 | cmpfunc f; |
| 804 | |
| 805 | /* If the types are equal, don't bother with coercions etc. |
| 806 | Instances are special-cased in try_3way_compare, since |
| 807 | a result of 2 does *not* mean one value being greater |
| 808 | than the other. */ |
| 809 | if (v->ob_type == w->ob_type |
| 810 | && (f = v->ob_type->tp_compare) != NULL |
| 811 | && !PyInstance_Check(v)) { |
| 812 | int c; |
| 813 | richcmpfunc f1; |
| 814 | if ((f1 = RICHCOMPARE(v->ob_type)) != NULL) { |
| 815 | /* If the type has richcmp, try it first. |
| 816 | try_rich_compare would try it two-sided, |
| 817 | which is not needed since we've a single |
| 818 | type only. */ |
| 819 | res = (*f1)(v, w, op); |
| 820 | if (res != Py_NotImplemented) |
| 821 | return res; |
| 822 | Py_DECREF(res); |
| 823 | } |
| 824 | c = (*f)(v, w); |
| 825 | if (c < 0 && PyErr_Occurred()) |
| 826 | return NULL; |
| 827 | return convert_3way_to_object(op, c); |
| 828 | } |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 829 | |
| 830 | res = try_rich_compare(v, w, op); |
| 831 | if (res != Py_NotImplemented) |
| 832 | return res; |
| 833 | Py_DECREF(res); |
| 834 | |
| 835 | return try_3way_to_rich_compare(v, w, op); |
| 836 | } |
| 837 | |
| 838 | PyObject * |
| 839 | PyObject_RichCompare(PyObject *v, PyObject *w, int op) |
| 840 | { |
| 841 | PyObject *res; |
| 842 | |
| 843 | assert(Py_LT <= op && op <= Py_GE); |
| 844 | |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 845 | compare_nesting++; |
| 846 | if (compare_nesting > NESTING_LIMIT && |
| 847 | (v->ob_type->tp_as_mapping |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 848 | || (v->ob_type->tp_as_sequence |
| 849 | && !PyString_Check(v) |
| 850 | && !PyTuple_Check(v)))) { |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 851 | /* try to detect circular data structures */ |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 852 | PyObject *token = check_recursion(v, w, op); |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 853 | |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 854 | if (token == NULL) { |
| 855 | res = NULL; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 856 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 857 | else if (token == Py_None) { |
| 858 | /* already comparing these objects with this operator. |
| 859 | assume they're equal until shown otherwise */ |
| 860 | if (op == Py_EQ) |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 861 | res = Py_True; |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 862 | else if (op == Py_NE) |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 863 | res = Py_False; |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 864 | else { |
| 865 | PyErr_SetString(PyExc_ValueError, |
| 866 | "can't order recursive values"); |
| 867 | res = NULL; |
| 868 | } |
| 869 | Py_XINCREF(res); |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 870 | } |
Guido van Rossum | a3af41d | 2001-01-18 22:07:06 +0000 | [diff] [blame] | 871 | else { |
| 872 | res = do_richcmp(v, w, op); |
| 873 | delete_token(token); |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 874 | } |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 875 | } |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 876 | else { |
| 877 | res = do_richcmp(v, w, op); |
| 878 | } |
Guido van Rossum | 2ffbf6b | 2001-01-17 21:27:02 +0000 | [diff] [blame] | 879 | compare_nesting--; |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 880 | return res; |
| 881 | } |
| 882 | |
Tim Peters | de9725f | 2001-05-05 10:06:17 +0000 | [diff] [blame] | 883 | /* Return -1 if error; 1 if v op w; 0 if not (v op w). */ |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 884 | int |
| 885 | PyObject_RichCompareBool(PyObject *v, PyObject *w, int op) |
| 886 | { |
| 887 | PyObject *res = PyObject_RichCompare(v, w, op); |
| 888 | int ok; |
| 889 | |
| 890 | if (res == NULL) |
| 891 | return -1; |
| 892 | ok = PyObject_IsTrue(res); |
| 893 | Py_DECREF(res); |
| 894 | return ok; |
| 895 | } |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 896 | |
| 897 | /* Set of hash utility functions to help maintaining the invariant that |
| 898 | iff a==b then hash(a)==hash(b) |
| 899 | |
| 900 | All the utility functions (_Py_Hash*()) return "-1" to signify an error. |
| 901 | */ |
| 902 | |
| 903 | long |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 904 | _Py_HashDouble(double v) |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 905 | { |
Tim Peters | 39dce29 | 2000-08-15 03:34:48 +0000 | [diff] [blame] | 906 | double intpart, fractpart; |
| 907 | int expo; |
| 908 | long hipart; |
| 909 | long x; /* the final hash value */ |
| 910 | /* This is designed so that Python numbers of different types |
| 911 | * that compare equal hash to the same value; otherwise comparisons |
| 912 | * of mapping keys will turn out weird. |
| 913 | */ |
| 914 | |
| 915 | #ifdef MPW /* MPW C modf expects pointer to extended as second argument */ |
| 916 | { |
| 917 | extended e; |
| 918 | fractpart = modf(v, &e); |
| 919 | intpart = e; |
| 920 | } |
| 921 | #else |
| 922 | fractpart = modf(v, &intpart); |
| 923 | #endif |
| 924 | if (fractpart == 0.0) { |
| 925 | /* This must return the same hash as an equal int or long. */ |
| 926 | if (intpart > LONG_MAX || -intpart > LONG_MAX) { |
| 927 | /* Convert to long and use its hash. */ |
| 928 | PyObject *plong; /* converted to Python long */ |
| 929 | if (Py_IS_INFINITY(intpart)) |
| 930 | /* can't convert to long int -- arbitrary */ |
| 931 | v = v < 0 ? -271828.0 : 314159.0; |
| 932 | plong = PyLong_FromDouble(v); |
| 933 | if (plong == NULL) |
| 934 | return -1; |
| 935 | x = PyObject_Hash(plong); |
| 936 | Py_DECREF(plong); |
| 937 | return x; |
| 938 | } |
| 939 | /* Fits in a C long == a Python int, so is its own hash. */ |
| 940 | x = (long)intpart; |
| 941 | if (x == -1) |
| 942 | x = -2; |
| 943 | return x; |
| 944 | } |
| 945 | /* The fractional part is non-zero, so we don't have to worry about |
| 946 | * making this match the hash of some other type. |
| 947 | * Use frexp to get at the bits in the double. |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 948 | * Since the VAX D double format has 56 mantissa bits, which is the |
| 949 | * most of any double format in use, each of these parts may have as |
| 950 | * many as (but no more than) 56 significant bits. |
Tim Peters | 39dce29 | 2000-08-15 03:34:48 +0000 | [diff] [blame] | 951 | * So, assuming sizeof(long) >= 4, each part can be broken into two |
| 952 | * longs; frexp and multiplication are used to do that. |
| 953 | * Also, since the Cray double format has 15 exponent bits, which is |
| 954 | * the most of any double format in use, shifting the exponent field |
| 955 | * 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] | 956 | */ |
Tim Peters | 39dce29 | 2000-08-15 03:34:48 +0000 | [diff] [blame] | 957 | v = frexp(v, &expo); |
| 958 | v *= 2147483648.0; /* 2**31 */ |
| 959 | hipart = (long)v; /* take the top 32 bits */ |
| 960 | v = (v - (double)hipart) * 2147483648.0; /* get the next 32 bits */ |
| 961 | x = hipart + (long)v + (expo << 15); |
| 962 | if (x == -1) |
| 963 | x = -2; |
| 964 | return x; |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 965 | } |
| 966 | |
| 967 | long |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 968 | _Py_HashPointer(void *p) |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 969 | { |
| 970 | #if SIZEOF_LONG >= SIZEOF_VOID_P |
| 971 | return (long)p; |
| 972 | #else |
| 973 | /* convert to a Python long and hash that */ |
| 974 | PyObject* longobj; |
| 975 | long x; |
| 976 | |
| 977 | if ((longobj = PyLong_FromVoidPtr(p)) == NULL) { |
| 978 | x = -1; |
| 979 | goto finally; |
| 980 | } |
| 981 | x = PyObject_Hash(longobj); |
| 982 | |
| 983 | finally: |
| 984 | Py_XDECREF(longobj); |
| 985 | return x; |
| 986 | #endif |
| 987 | } |
| 988 | |
| 989 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 990 | long |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 991 | PyObject_Hash(PyObject *v) |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 992 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 993 | PyTypeObject *tp = v->ob_type; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 994 | if (tp->tp_hash != NULL) |
| 995 | return (*tp->tp_hash)(v); |
Guido van Rossum | d1f06b9 | 2001-01-24 22:14:43 +0000 | [diff] [blame] | 996 | if (tp->tp_compare == NULL && RICHCOMPARE(tp) == NULL) { |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 997 | return _Py_HashPointer(v); /* Use address as hash value */ |
| 998 | } |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 999 | /* If there's a cmp but no hash defined, the object can't be hashed */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1000 | PyErr_SetString(PyExc_TypeError, "unhashable type"); |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 1001 | return -1; |
| 1002 | } |
| 1003 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1004 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1005 | PyObject_GetAttrString(PyObject *v, char *name) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1006 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1007 | PyObject *w, *res; |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 1008 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1009 | if (v->ob_type->tp_getattr != NULL) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1010 | return (*v->ob_type->tp_getattr)(v, name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1011 | w = PyString_InternFromString(name); |
| 1012 | if (w == NULL) |
| 1013 | return NULL; |
| 1014 | res = PyObject_GetAttr(v, w); |
| 1015 | Py_XDECREF(w); |
| 1016 | return res; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1017 | } |
| 1018 | |
| 1019 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1020 | PyObject_HasAttrString(PyObject *v, char *name) |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 1021 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1022 | PyObject *res = PyObject_GetAttrString(v, name); |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 1023 | if (res != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1024 | Py_DECREF(res); |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 1025 | return 1; |
| 1026 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1027 | PyErr_Clear(); |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 1028 | return 0; |
| 1029 | } |
| 1030 | |
| 1031 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1032 | PyObject_SetAttrString(PyObject *v, char *name, PyObject *w) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1033 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1034 | PyObject *s; |
| 1035 | int res; |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 1036 | |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1037 | if (v->ob_type->tp_setattr != NULL) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1038 | return (*v->ob_type->tp_setattr)(v, name, w); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1039 | s = PyString_InternFromString(name); |
| 1040 | if (s == NULL) |
| 1041 | return -1; |
| 1042 | res = PyObject_SetAttr(v, s, w); |
| 1043 | Py_XDECREF(s); |
| 1044 | return res; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1045 | } |
| 1046 | |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 1047 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1048 | PyObject_GetAttr(PyObject *v, PyObject *name) |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 1049 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1050 | PyTypeObject *tp = v->ob_type; |
| 1051 | |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1052 | #ifdef Py_USING_UNICODE |
Marc-André Lemburg | e44e507 | 2000-09-18 16:20:57 +0000 | [diff] [blame] | 1053 | /* The Unicode to string conversion is done here because the |
| 1054 | existing tp_getattro slots expect a string object as name |
| 1055 | and we wouldn't want to break those. */ |
| 1056 | if (PyUnicode_Check(name)) { |
| 1057 | name = _PyUnicode_AsDefaultEncodedString(name, NULL); |
| 1058 | if (name == NULL) |
| 1059 | return NULL; |
| 1060 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1061 | #endif |
| 1062 | |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 1063 | if (!PyString_Check(name)) { |
| 1064 | PyErr_SetString(PyExc_TypeError, |
| 1065 | "attribute name must be string"); |
| 1066 | return NULL; |
| 1067 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1068 | if (tp->tp_getattro != NULL) |
| 1069 | return (*tp->tp_getattro)(v, name); |
| 1070 | if (tp->tp_getattr != NULL) |
| 1071 | return (*tp->tp_getattr)(v, PyString_AS_STRING(name)); |
| 1072 | PyErr_Format(PyExc_AttributeError, |
| 1073 | "'%.50s' object has no attribute '%.400s'", |
| 1074 | tp->tp_name, PyString_AS_STRING(name)); |
| 1075 | return NULL; |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 1076 | } |
| 1077 | |
| 1078 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1079 | PyObject_HasAttr(PyObject *v, PyObject *name) |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 1080 | { |
| 1081 | PyObject *res = PyObject_GetAttr(v, name); |
| 1082 | if (res != NULL) { |
| 1083 | Py_DECREF(res); |
| 1084 | return 1; |
| 1085 | } |
| 1086 | PyErr_Clear(); |
| 1087 | return 0; |
| 1088 | } |
| 1089 | |
| 1090 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1091 | PyObject_SetAttr(PyObject *v, PyObject *name, PyObject *value) |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 1092 | { |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1093 | PyTypeObject *tp = v->ob_type; |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 1094 | int err; |
Marc-André Lemburg | e44e507 | 2000-09-18 16:20:57 +0000 | [diff] [blame] | 1095 | |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1096 | #ifdef Py_USING_UNICODE |
Marc-André Lemburg | e44e507 | 2000-09-18 16:20:57 +0000 | [diff] [blame] | 1097 | /* The Unicode to string conversion is done here because the |
| 1098 | existing tp_setattro slots expect a string object as name |
| 1099 | and we wouldn't want to break those. */ |
| 1100 | if (PyUnicode_Check(name)) { |
| 1101 | name = PyUnicode_AsEncodedString(name, NULL, NULL); |
| 1102 | if (name == NULL) |
| 1103 | return -1; |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 1104 | } |
Martin v. Löwis | 339d0f7 | 2001-08-17 18:39:25 +0000 | [diff] [blame] | 1105 | else |
| 1106 | #endif |
| 1107 | if (!PyString_Check(name)){ |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 1108 | PyErr_SetString(PyExc_TypeError, |
| 1109 | "attribute name must be string"); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1110 | return -1; |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 1111 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1112 | else |
| 1113 | Py_INCREF(name); |
| 1114 | |
| 1115 | PyString_InternInPlace(&name); |
| 1116 | if (tp->tp_setattro != NULL) { |
| 1117 | err = (*tp->tp_setattro)(v, name, value); |
| 1118 | Py_DECREF(name); |
| 1119 | return err; |
Marc-André Lemburg | e44e507 | 2000-09-18 16:20:57 +0000 | [diff] [blame] | 1120 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1121 | if (tp->tp_setattr != NULL) { |
| 1122 | err = (*tp->tp_setattr)(v, PyString_AS_STRING(name), value); |
| 1123 | Py_DECREF(name); |
| 1124 | return err; |
| 1125 | } |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 1126 | Py_DECREF(name); |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1127 | if (tp->tp_getattr == NULL && tp->tp_getattro == NULL) |
| 1128 | PyErr_Format(PyExc_TypeError, |
| 1129 | "'%.100s' object has no attributes " |
| 1130 | "(%s .%.100s)", |
| 1131 | tp->tp_name, |
| 1132 | value==NULL ? "del" : "assign to", |
| 1133 | PyString_AS_STRING(name)); |
| 1134 | else |
| 1135 | PyErr_Format(PyExc_TypeError, |
| 1136 | "'%.100s' object has only read-only attributes " |
| 1137 | "(%s .%.100s)", |
| 1138 | tp->tp_name, |
| 1139 | value==NULL ? "del" : "assign to", |
| 1140 | PyString_AS_STRING(name)); |
| 1141 | return -1; |
| 1142 | } |
| 1143 | |
| 1144 | /* Helper to get a pointer to an object's __dict__ slot, if any */ |
| 1145 | |
| 1146 | PyObject ** |
| 1147 | _PyObject_GetDictPtr(PyObject *obj) |
| 1148 | { |
| 1149 | #define PTRSIZE (sizeof(PyObject *)) |
| 1150 | |
| 1151 | long dictoffset; |
| 1152 | PyTypeObject *tp = obj->ob_type; |
| 1153 | |
| 1154 | if (!(tp->tp_flags & Py_TPFLAGS_HAVE_CLASS)) |
| 1155 | return NULL; |
| 1156 | dictoffset = tp->tp_dictoffset; |
| 1157 | if (dictoffset == 0) |
| 1158 | return NULL; |
| 1159 | if (dictoffset < 0) { |
Neil Schemenauer | fd34369 | 2001-08-29 23:54:03 +0000 | [diff] [blame] | 1160 | dictoffset += tp->tp_basicsize; |
Guido van Rossum | dd4d1c4 | 2001-09-20 13:38:22 +0000 | [diff] [blame] | 1161 | dictoffset += tp->tp_itemsize * ((PyVarObject *)obj)->ob_size; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1162 | assert(dictoffset > 0); /* Sanity check */ |
Guido van Rossum | dd4d1c4 | 2001-09-20 13:38:22 +0000 | [diff] [blame] | 1163 | /* Round up, if necessary */ |
| 1164 | if (dictoffset % PTRSIZE != 0) { |
| 1165 | dictoffset /= PTRSIZE; |
| 1166 | dictoffset += 1; |
| 1167 | dictoffset *= PTRSIZE; |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1168 | } |
| 1169 | } |
| 1170 | return (PyObject **) ((char *)obj + dictoffset); |
| 1171 | } |
| 1172 | |
| 1173 | /* Generic GetAttr functions - put these in your tp_[gs]etattro slot */ |
| 1174 | |
| 1175 | PyObject * |
| 1176 | PyObject_GenericGetAttr(PyObject *obj, PyObject *name) |
| 1177 | { |
| 1178 | PyTypeObject *tp = obj->ob_type; |
| 1179 | PyObject *descr; |
| 1180 | descrgetfunc f; |
| 1181 | PyObject **dictptr; |
| 1182 | |
| 1183 | if (tp->tp_dict == NULL) { |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 1184 | if (PyType_Ready(tp) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1185 | return NULL; |
| 1186 | } |
| 1187 | |
| 1188 | descr = _PyType_Lookup(tp, name); |
| 1189 | f = NULL; |
| 1190 | if (descr != NULL) { |
| 1191 | f = descr->ob_type->tp_descr_get; |
| 1192 | if (f != NULL && PyDescr_IsData(descr)) |
| 1193 | return f(descr, obj, (PyObject *)obj->ob_type); |
| 1194 | } |
| 1195 | |
| 1196 | dictptr = _PyObject_GetDictPtr(obj); |
| 1197 | if (dictptr != NULL) { |
| 1198 | PyObject *dict = *dictptr; |
| 1199 | if (dict != NULL) { |
| 1200 | PyObject *res = PyDict_GetItem(dict, name); |
| 1201 | if (res != NULL) { |
| 1202 | Py_INCREF(res); |
| 1203 | return res; |
| 1204 | } |
| 1205 | } |
| 1206 | } |
| 1207 | |
| 1208 | if (f != NULL) |
| 1209 | return f(descr, obj, (PyObject *)obj->ob_type); |
| 1210 | |
| 1211 | if (descr != NULL) { |
| 1212 | Py_INCREF(descr); |
| 1213 | return descr; |
| 1214 | } |
| 1215 | |
| 1216 | PyErr_Format(PyExc_AttributeError, |
| 1217 | "'%.50s' object has no attribute '%.400s'", |
| 1218 | tp->tp_name, PyString_AS_STRING(name)); |
| 1219 | return NULL; |
| 1220 | } |
| 1221 | |
| 1222 | int |
| 1223 | PyObject_GenericSetAttr(PyObject *obj, PyObject *name, PyObject *value) |
| 1224 | { |
| 1225 | PyTypeObject *tp = obj->ob_type; |
| 1226 | PyObject *descr; |
| 1227 | descrsetfunc f; |
| 1228 | PyObject **dictptr; |
| 1229 | |
| 1230 | if (tp->tp_dict == NULL) { |
Guido van Rossum | 528b7eb | 2001-08-07 17:24:28 +0000 | [diff] [blame] | 1231 | if (PyType_Ready(tp) < 0) |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1232 | return -1; |
| 1233 | } |
| 1234 | |
| 1235 | descr = _PyType_Lookup(tp, name); |
| 1236 | f = NULL; |
| 1237 | if (descr != NULL) { |
| 1238 | f = descr->ob_type->tp_descr_set; |
| 1239 | if (f != NULL && PyDescr_IsData(descr)) |
| 1240 | return f(descr, obj, value); |
| 1241 | } |
| 1242 | |
| 1243 | dictptr = _PyObject_GetDictPtr(obj); |
| 1244 | if (dictptr != NULL) { |
| 1245 | PyObject *dict = *dictptr; |
| 1246 | if (dict == NULL && value != NULL) { |
| 1247 | dict = PyDict_New(); |
| 1248 | if (dict == NULL) |
| 1249 | return -1; |
| 1250 | *dictptr = dict; |
| 1251 | } |
| 1252 | if (dict != NULL) { |
| 1253 | int res; |
| 1254 | if (value == NULL) |
| 1255 | res = PyDict_DelItem(dict, name); |
| 1256 | else |
| 1257 | res = PyDict_SetItem(dict, name, value); |
| 1258 | if (res < 0 && PyErr_ExceptionMatches(PyExc_KeyError)) |
| 1259 | PyErr_SetObject(PyExc_AttributeError, name); |
| 1260 | return res; |
| 1261 | } |
| 1262 | } |
| 1263 | |
| 1264 | if (f != NULL) |
| 1265 | return f(descr, obj, value); |
| 1266 | |
| 1267 | if (descr == NULL) { |
| 1268 | PyErr_Format(PyExc_AttributeError, |
| 1269 | "'%.50s' object has no attribute '%.400s'", |
| 1270 | tp->tp_name, PyString_AS_STRING(name)); |
| 1271 | return -1; |
| 1272 | } |
| 1273 | |
| 1274 | PyErr_Format(PyExc_AttributeError, |
| 1275 | "'%.50s' object attribute '%.400s' is read-only", |
| 1276 | tp->tp_name, PyString_AS_STRING(name)); |
| 1277 | return -1; |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 1278 | } |
| 1279 | |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1280 | /* Test a value used as condition, e.g., in a for or if statement. |
| 1281 | Return -1 if an error occurred */ |
| 1282 | |
| 1283 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1284 | PyObject_IsTrue(PyObject *v) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1285 | { |
| 1286 | int res; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1287 | if (v == Py_None) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1288 | res = 0; |
Guido van Rossum | 1c4f458 | 1998-05-22 00:53:24 +0000 | [diff] [blame] | 1289 | else if (v->ob_type->tp_as_number != NULL && |
| 1290 | v->ob_type->tp_as_number->nb_nonzero != NULL) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1291 | res = (*v->ob_type->tp_as_number->nb_nonzero)(v); |
Guido van Rossum | 1c4f458 | 1998-05-22 00:53:24 +0000 | [diff] [blame] | 1292 | else if (v->ob_type->tp_as_mapping != NULL && |
| 1293 | v->ob_type->tp_as_mapping->mp_length != NULL) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1294 | res = (*v->ob_type->tp_as_mapping->mp_length)(v); |
Guido van Rossum | 1c4f458 | 1998-05-22 00:53:24 +0000 | [diff] [blame] | 1295 | else if (v->ob_type->tp_as_sequence != NULL && |
| 1296 | v->ob_type->tp_as_sequence->sq_length != NULL) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 1297 | res = (*v->ob_type->tp_as_sequence->sq_length)(v); |
| 1298 | else |
| 1299 | res = 1; |
| 1300 | if (res > 0) |
| 1301 | res = 1; |
| 1302 | return res; |
| 1303 | } |
| 1304 | |
Guido van Rossum | c3d3f96 | 1998-04-09 17:53:59 +0000 | [diff] [blame] | 1305 | /* equivalent of 'not v' |
| 1306 | Return -1 if an error occurred */ |
| 1307 | |
| 1308 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1309 | PyObject_Not(PyObject *v) |
Guido van Rossum | c3d3f96 | 1998-04-09 17:53:59 +0000 | [diff] [blame] | 1310 | { |
| 1311 | int res; |
| 1312 | res = PyObject_IsTrue(v); |
| 1313 | if (res < 0) |
| 1314 | return res; |
| 1315 | return res == 0; |
| 1316 | } |
| 1317 | |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 1318 | /* Coerce two numeric types to the "larger" one. |
| 1319 | Increment the reference count on each argument. |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 1320 | Return value: |
| 1321 | -1 if an error occurred; |
| 1322 | 0 if the coercion succeeded (and then the reference counts are increased); |
| 1323 | 1 if no coercion is possible (and no error is raised). |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 1324 | */ |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 1325 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1326 | PyNumber_CoerceEx(PyObject **pv, PyObject **pw) |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 1327 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1328 | register PyObject *v = *pv; |
| 1329 | register PyObject *w = *pw; |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 1330 | int res; |
| 1331 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1332 | if (v->ob_type == w->ob_type && !PyInstance_Check(v)) { |
| 1333 | Py_INCREF(v); |
| 1334 | Py_INCREF(w); |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 1335 | return 0; |
| 1336 | } |
| 1337 | if (v->ob_type->tp_as_number && v->ob_type->tp_as_number->nb_coerce) { |
| 1338 | res = (*v->ob_type->tp_as_number->nb_coerce)(pv, pw); |
| 1339 | if (res <= 0) |
| 1340 | return res; |
| 1341 | } |
| 1342 | if (w->ob_type->tp_as_number && w->ob_type->tp_as_number->nb_coerce) { |
| 1343 | res = (*w->ob_type->tp_as_number->nb_coerce)(pw, pv); |
| 1344 | if (res <= 0) |
| 1345 | return res; |
| 1346 | } |
Guido van Rossum | 242c642 | 1997-11-19 16:03:17 +0000 | [diff] [blame] | 1347 | return 1; |
| 1348 | } |
| 1349 | |
Guido van Rossum | e797ec1 | 2001-01-17 15:24:28 +0000 | [diff] [blame] | 1350 | /* Coerce two numeric types to the "larger" one. |
| 1351 | Increment the reference count on each argument. |
| 1352 | Return -1 and raise an exception if no coercion is possible |
| 1353 | (and then no reference count is incremented). |
| 1354 | */ |
Guido van Rossum | 242c642 | 1997-11-19 16:03:17 +0000 | [diff] [blame] | 1355 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1356 | PyNumber_Coerce(PyObject **pv, PyObject **pw) |
Guido van Rossum | 242c642 | 1997-11-19 16:03:17 +0000 | [diff] [blame] | 1357 | { |
| 1358 | int err = PyNumber_CoerceEx(pv, pw); |
| 1359 | if (err <= 0) |
| 1360 | return err; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1361 | PyErr_SetString(PyExc_TypeError, "number coercion failed"); |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 1362 | return -1; |
| 1363 | } |
| 1364 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1365 | |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1366 | /* Test whether an object can be called */ |
| 1367 | |
| 1368 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1369 | PyCallable_Check(PyObject *x) |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1370 | { |
| 1371 | if (x == NULL) |
| 1372 | return 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1373 | if (PyInstance_Check(x)) { |
| 1374 | PyObject *call = PyObject_GetAttrString(x, "__call__"); |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1375 | if (call == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1376 | PyErr_Clear(); |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1377 | return 0; |
| 1378 | } |
| 1379 | /* Could test recursively but don't, for fear of endless |
| 1380 | recursion if some joker sets self.__call__ = self */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1381 | Py_DECREF(call); |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1382 | return 1; |
| 1383 | } |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1384 | else { |
| 1385 | return x->ob_type->tp_call != NULL; |
| 1386 | } |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1387 | } |
| 1388 | |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1389 | /* Helper for PyObject_Dir. |
| 1390 | Merge the __dict__ of aclass into dict, and recursively also all |
| 1391 | the __dict__s of aclass's base classes. The order of merging isn't |
| 1392 | defined, as it's expected that only the final set of dict keys is |
| 1393 | interesting. |
| 1394 | Return 0 on success, -1 on error. |
| 1395 | */ |
| 1396 | |
| 1397 | static int |
| 1398 | merge_class_dict(PyObject* dict, PyObject* aclass) |
| 1399 | { |
| 1400 | PyObject *classdict; |
| 1401 | PyObject *bases; |
| 1402 | |
| 1403 | assert(PyDict_Check(dict)); |
| 1404 | assert(aclass); |
| 1405 | |
| 1406 | /* Merge in the type's dict (if any). */ |
| 1407 | classdict = PyObject_GetAttrString(aclass, "__dict__"); |
| 1408 | if (classdict == NULL) |
| 1409 | PyErr_Clear(); |
| 1410 | else { |
| 1411 | int status = PyDict_Update(dict, classdict); |
| 1412 | Py_DECREF(classdict); |
| 1413 | if (status < 0) |
| 1414 | return -1; |
| 1415 | } |
| 1416 | |
| 1417 | /* Recursively merge in the base types' (if any) dicts. */ |
| 1418 | bases = PyObject_GetAttrString(aclass, "__bases__"); |
Tim Peters | bc7e863 | 2001-09-16 20:33:22 +0000 | [diff] [blame] | 1419 | if (bases == NULL) |
| 1420 | PyErr_Clear(); |
| 1421 | else { |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1422 | int i, n; |
| 1423 | assert(PyTuple_Check(bases)); |
| 1424 | n = PyTuple_GET_SIZE(bases); |
| 1425 | for (i = 0; i < n; i++) { |
| 1426 | PyObject *base = PyTuple_GET_ITEM(bases, i); |
| 1427 | if (merge_class_dict(dict, base) < 0) { |
| 1428 | Py_DECREF(bases); |
| 1429 | return -1; |
| 1430 | } |
| 1431 | } |
| 1432 | Py_DECREF(bases); |
| 1433 | } |
| 1434 | return 0; |
| 1435 | } |
| 1436 | |
Tim Peters | 305b585 | 2001-09-17 02:38:46 +0000 | [diff] [blame] | 1437 | /* Helper for PyObject_Dir. |
| 1438 | If obj has an attr named attrname that's a list, merge its string |
| 1439 | elements into keys of dict. |
| 1440 | Return 0 on success, -1 on error. Errors due to not finding the attr, |
| 1441 | or the attr not being a list, are suppressed. |
| 1442 | */ |
| 1443 | |
| 1444 | static int |
| 1445 | merge_list_attr(PyObject* dict, PyObject* obj, char *attrname) |
| 1446 | { |
| 1447 | PyObject *list; |
| 1448 | int result = 0; |
| 1449 | |
| 1450 | assert(PyDict_Check(dict)); |
| 1451 | assert(obj); |
| 1452 | assert(attrname); |
| 1453 | |
| 1454 | list = PyObject_GetAttrString(obj, attrname); |
| 1455 | if (list == NULL) |
| 1456 | PyErr_Clear(); |
| 1457 | |
| 1458 | else if (PyList_Check(list)) { |
| 1459 | int i; |
| 1460 | for (i = 0; i < PyList_GET_SIZE(list); ++i) { |
| 1461 | PyObject *item = PyList_GET_ITEM(list, i); |
| 1462 | if (PyString_Check(item)) { |
| 1463 | result = PyDict_SetItem(dict, item, Py_None); |
| 1464 | if (result < 0) |
| 1465 | break; |
| 1466 | } |
| 1467 | } |
| 1468 | } |
| 1469 | |
| 1470 | Py_XDECREF(list); |
| 1471 | return result; |
| 1472 | } |
| 1473 | |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1474 | /* Like __builtin__.dir(arg). See bltinmodule.c's builtin_dir for the |
| 1475 | docstring, which should be kept in synch with this implementation. */ |
| 1476 | |
| 1477 | PyObject * |
| 1478 | PyObject_Dir(PyObject *arg) |
| 1479 | { |
| 1480 | /* Set exactly one of these non-NULL before the end. */ |
| 1481 | PyObject *result = NULL; /* result list */ |
| 1482 | PyObject *masterdict = NULL; /* result is masterdict.keys() */ |
| 1483 | |
| 1484 | /* If NULL arg, return the locals. */ |
| 1485 | if (arg == NULL) { |
| 1486 | PyObject *locals = PyEval_GetLocals(); |
| 1487 | if (locals == NULL) |
| 1488 | goto error; |
| 1489 | result = PyDict_Keys(locals); |
| 1490 | if (result == NULL) |
| 1491 | goto error; |
| 1492 | } |
| 1493 | |
| 1494 | /* Elif this is some form of module, we only want its dict. */ |
Guido van Rossum | 8dbd3d8 | 2001-09-10 18:27:43 +0000 | [diff] [blame] | 1495 | else if (PyModule_Check(arg)) { |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1496 | masterdict = PyObject_GetAttrString(arg, "__dict__"); |
| 1497 | if (masterdict == NULL) |
| 1498 | goto error; |
Guido van Rossum | 8dbd3d8 | 2001-09-10 18:27:43 +0000 | [diff] [blame] | 1499 | if (!PyDict_Check(masterdict)) { |
| 1500 | PyErr_SetString(PyExc_TypeError, |
| 1501 | "module.__dict__ is not a dictionary"); |
| 1502 | goto error; |
| 1503 | } |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1504 | } |
| 1505 | |
| 1506 | /* Elif some form of type or class, grab its dict and its bases. |
| 1507 | We deliberately don't suck up its __class__, as methods belonging |
| 1508 | to the metaclass would probably be more confusing than helpful. */ |
| 1509 | else if (PyType_Check(arg) || PyClass_Check(arg)) { |
| 1510 | masterdict = PyDict_New(); |
| 1511 | if (masterdict == NULL) |
| 1512 | goto error; |
| 1513 | if (merge_class_dict(masterdict, arg) < 0) |
| 1514 | goto error; |
| 1515 | } |
| 1516 | |
| 1517 | /* Else look at its dict, and the attrs reachable from its class. */ |
| 1518 | else { |
| 1519 | PyObject *itsclass; |
| 1520 | /* Create a dict to start with. CAUTION: Not everything |
| 1521 | responding to __dict__ returns a dict! */ |
| 1522 | masterdict = PyObject_GetAttrString(arg, "__dict__"); |
| 1523 | if (masterdict == NULL) { |
| 1524 | PyErr_Clear(); |
| 1525 | masterdict = PyDict_New(); |
| 1526 | } |
| 1527 | else if (!PyDict_Check(masterdict)) { |
| 1528 | Py_DECREF(masterdict); |
| 1529 | masterdict = PyDict_New(); |
| 1530 | } |
| 1531 | else { |
| 1532 | /* The object may have returned a reference to its |
| 1533 | dict, so copy it to avoid mutating it. */ |
| 1534 | PyObject *temp = PyDict_Copy(masterdict); |
| 1535 | Py_DECREF(masterdict); |
| 1536 | masterdict = temp; |
| 1537 | } |
| 1538 | if (masterdict == NULL) |
| 1539 | goto error; |
| 1540 | |
Tim Peters | 305b585 | 2001-09-17 02:38:46 +0000 | [diff] [blame] | 1541 | /* Merge in __members__ and __methods__ (if any). |
| 1542 | XXX Would like this to go away someday; for now, it's |
| 1543 | XXX needed to get at im_self etc of method objects. */ |
| 1544 | if (merge_list_attr(masterdict, arg, "__members__") < 0) |
| 1545 | goto error; |
| 1546 | if (merge_list_attr(masterdict, arg, "__methods__") < 0) |
| 1547 | goto error; |
| 1548 | |
Tim Peters | 7eea37e | 2001-09-04 22:08:56 +0000 | [diff] [blame] | 1549 | /* Merge in attrs reachable from its class. |
| 1550 | CAUTION: Not all objects have a __class__ attr. */ |
| 1551 | itsclass = PyObject_GetAttrString(arg, "__class__"); |
| 1552 | if (itsclass == NULL) |
| 1553 | PyErr_Clear(); |
| 1554 | else { |
| 1555 | int status = merge_class_dict(masterdict, itsclass); |
| 1556 | Py_DECREF(itsclass); |
| 1557 | if (status < 0) |
| 1558 | goto error; |
| 1559 | } |
| 1560 | } |
| 1561 | |
| 1562 | assert((result == NULL) ^ (masterdict == NULL)); |
| 1563 | if (masterdict != NULL) { |
| 1564 | /* The result comes from its keys. */ |
| 1565 | assert(result == NULL); |
| 1566 | result = PyDict_Keys(masterdict); |
| 1567 | if (result == NULL) |
| 1568 | goto error; |
| 1569 | } |
| 1570 | |
| 1571 | assert(result); |
| 1572 | if (PyList_Sort(result) != 0) |
| 1573 | goto error; |
| 1574 | else |
| 1575 | goto normal_return; |
| 1576 | |
| 1577 | error: |
| 1578 | Py_XDECREF(result); |
| 1579 | result = NULL; |
| 1580 | /* fall through */ |
| 1581 | normal_return: |
| 1582 | Py_XDECREF(masterdict); |
| 1583 | return result; |
| 1584 | } |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 1585 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1586 | /* |
| 1587 | NoObject is usable as a non-NULL undefined value, used by the macro None. |
| 1588 | 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] | 1589 | so there is exactly one (which is indestructible, by the way). |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1590 | (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] | 1591 | */ |
| 1592 | |
Guido van Rossum | 0c182a1 | 1992-03-27 17:26:13 +0000 | [diff] [blame] | 1593 | /* ARGSUSED */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1594 | static PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1595 | none_repr(PyObject *op) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1596 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1597 | return PyString_FromString("None"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1598 | } |
| 1599 | |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 1600 | /* ARGUSED */ |
| 1601 | static void |
| 1602 | none_dealloc(PyObject* ignore) |
| 1603 | { |
| 1604 | /* This should never get called, but we also don't want to SEGV if |
| 1605 | * we accidently decref None out of existance. |
| 1606 | */ |
| 1607 | abort(); |
| 1608 | } |
| 1609 | |
| 1610 | |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1611 | static PyTypeObject PyNone_Type = { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1612 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1613 | 0, |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1614 | "NoneType", |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1615 | 0, |
| 1616 | 0, |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 1617 | (destructor)none_dealloc, /*tp_dealloc*/ /*never called*/ |
Guido van Rossum | 7066dd7 | 1992-09-17 17:54:56 +0000 | [diff] [blame] | 1618 | 0, /*tp_print*/ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1619 | 0, /*tp_getattr*/ |
| 1620 | 0, /*tp_setattr*/ |
| 1621 | 0, /*tp_compare*/ |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 1622 | (reprfunc)none_repr, /*tp_repr*/ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1623 | 0, /*tp_as_number*/ |
| 1624 | 0, /*tp_as_sequence*/ |
| 1625 | 0, /*tp_as_mapping*/ |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 1626 | 0, /*tp_hash */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1627 | }; |
| 1628 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1629 | PyObject _Py_NoneStruct = { |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1630 | PyObject_HEAD_INIT(&PyNone_Type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1631 | }; |
| 1632 | |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 1633 | /* NotImplemented is an object that can be used to signal that an |
| 1634 | operation is not implemented for the given type combination. */ |
| 1635 | |
| 1636 | static PyObject * |
| 1637 | NotImplemented_repr(PyObject *op) |
| 1638 | { |
| 1639 | return PyString_FromString("NotImplemented"); |
| 1640 | } |
| 1641 | |
| 1642 | static PyTypeObject PyNotImplemented_Type = { |
| 1643 | PyObject_HEAD_INIT(&PyType_Type) |
| 1644 | 0, |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1645 | "NotImplementedType", |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 1646 | 0, |
| 1647 | 0, |
Barry Warsaw | 9bf1644 | 2001-01-23 16:24:35 +0000 | [diff] [blame] | 1648 | (destructor)none_dealloc, /*tp_dealloc*/ /*never called*/ |
Neil Schemenauer | 5ed85ec | 2001-01-04 01:48:10 +0000 | [diff] [blame] | 1649 | 0, /*tp_print*/ |
| 1650 | 0, /*tp_getattr*/ |
| 1651 | 0, /*tp_setattr*/ |
| 1652 | 0, /*tp_compare*/ |
| 1653 | (reprfunc)NotImplemented_repr, /*tp_repr*/ |
| 1654 | 0, /*tp_as_number*/ |
| 1655 | 0, /*tp_as_sequence*/ |
| 1656 | 0, /*tp_as_mapping*/ |
| 1657 | 0, /*tp_hash */ |
| 1658 | }; |
| 1659 | |
| 1660 | PyObject _Py_NotImplementedStruct = { |
| 1661 | PyObject_HEAD_INIT(&PyNotImplemented_Type) |
| 1662 | }; |
| 1663 | |
Guido van Rossum | ba21a49 | 2001-08-16 08:17:26 +0000 | [diff] [blame] | 1664 | void |
| 1665 | _Py_ReadyTypes(void) |
| 1666 | { |
| 1667 | if (PyType_Ready(&PyType_Type) < 0) |
| 1668 | Py_FatalError("Can't initialize 'type'"); |
| 1669 | |
| 1670 | if (PyType_Ready(&PyList_Type) < 0) |
| 1671 | Py_FatalError("Can't initialize 'list'"); |
| 1672 | |
| 1673 | if (PyType_Ready(&PyNone_Type) < 0) |
| 1674 | Py_FatalError("Can't initialize type(None)"); |
| 1675 | |
| 1676 | if (PyType_Ready(&PyNotImplemented_Type) < 0) |
| 1677 | Py_FatalError("Can't initialize type(NotImplemented)"); |
| 1678 | } |
| 1679 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1680 | |
Guido van Rossum | 84a9032 | 1996-05-22 16:34:47 +0000 | [diff] [blame] | 1681 | #ifdef Py_TRACE_REFS |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1682 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1683 | static PyObject refchain = {&refchain, &refchain}; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1684 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 1685 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1686 | _Py_ResetReferences(void) |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1687 | { |
| 1688 | refchain._ob_prev = refchain._ob_next = &refchain; |
| 1689 | _Py_RefTotal = 0; |
| 1690 | } |
| 1691 | |
| 1692 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1693 | _Py_NewReference(PyObject *op) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1694 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1695 | _Py_RefTotal++; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1696 | op->ob_refcnt = 1; |
| 1697 | op->_ob_next = refchain._ob_next; |
| 1698 | op->_ob_prev = &refchain; |
| 1699 | refchain._ob_next->_ob_prev = op; |
| 1700 | refchain._ob_next = op; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 1701 | #ifdef COUNT_ALLOCS |
| 1702 | inc_count(op->ob_type); |
| 1703 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1704 | } |
| 1705 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 1706 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1707 | _Py_ForgetReference(register PyObject *op) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1708 | { |
Guido van Rossum | bffd683 | 2000-01-20 22:32:56 +0000 | [diff] [blame] | 1709 | #ifdef SLOW_UNREF_CHECK |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 1710 | register PyObject *p; |
Guido van Rossum | bffd683 | 2000-01-20 22:32:56 +0000 | [diff] [blame] | 1711 | #endif |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1712 | if (op->ob_refcnt < 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1713 | Py_FatalError("UNREF negative refcnt"); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 1714 | if (op == &refchain || |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1715 | 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] | 1716 | Py_FatalError("UNREF invalid object"); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 1717 | #ifdef SLOW_UNREF_CHECK |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1718 | for (p = refchain._ob_next; p != &refchain; p = p->_ob_next) { |
| 1719 | if (p == op) |
| 1720 | break; |
| 1721 | } |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 1722 | if (p == &refchain) /* Not found */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1723 | Py_FatalError("UNREF unknown object"); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 1724 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1725 | op->_ob_next->_ob_prev = op->_ob_prev; |
| 1726 | op->_ob_prev->_ob_next = op->_ob_next; |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 1727 | op->_ob_next = op->_ob_prev = NULL; |
Guido van Rossum | d8953cb | 1995-04-06 14:46:26 +0000 | [diff] [blame] | 1728 | #ifdef COUNT_ALLOCS |
Tim Peters | 6d6c1a3 | 2001-08-02 04:15:00 +0000 | [diff] [blame] | 1729 | op->ob_type->tp_frees++; |
Guido van Rossum | d8953cb | 1995-04-06 14:46:26 +0000 | [diff] [blame] | 1730 | #endif |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1731 | } |
| 1732 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 1733 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1734 | _Py_Dealloc(PyObject *op) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1735 | { |
Guido van Rossum | 9776adf | 1994-09-07 14:36:45 +0000 | [diff] [blame] | 1736 | destructor dealloc = op->ob_type->tp_dealloc; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1737 | _Py_ForgetReference(op); |
Guido van Rossum | 9776adf | 1994-09-07 14:36:45 +0000 | [diff] [blame] | 1738 | (*dealloc)(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1739 | } |
| 1740 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 1741 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1742 | _Py_PrintReferences(FILE *fp) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1743 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1744 | PyObject *op; |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1745 | fprintf(fp, "Remaining objects:\n"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1746 | for (op = refchain._ob_next; op != &refchain; op = op->_ob_next) { |
| 1747 | fprintf(fp, "[%d] ", op->ob_refcnt); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 1748 | if (PyObject_Print(op, fp, 0) != 0) |
| 1749 | PyErr_Clear(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1750 | putc('\n', fp); |
| 1751 | } |
| 1752 | } |
| 1753 | |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 1754 | PyObject * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1755 | _Py_GetObjects(PyObject *self, PyObject *args) |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 1756 | { |
| 1757 | int i, n; |
| 1758 | PyObject *t = NULL; |
| 1759 | PyObject *res, *op; |
| 1760 | |
| 1761 | if (!PyArg_ParseTuple(args, "i|O", &n, &t)) |
| 1762 | return NULL; |
| 1763 | op = refchain._ob_next; |
| 1764 | res = PyList_New(0); |
| 1765 | if (res == NULL) |
| 1766 | return NULL; |
| 1767 | for (i = 0; (n == 0 || i < n) && op != &refchain; i++) { |
| 1768 | while (op == self || op == args || op == res || op == t || |
Guido van Rossum | 3c29602 | 2001-07-14 17:58:00 +0000 | [diff] [blame] | 1769 | (t != NULL && op->ob_type != (PyTypeObject *) t)) { |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 1770 | op = op->_ob_next; |
| 1771 | if (op == &refchain) |
| 1772 | return res; |
| 1773 | } |
| 1774 | if (PyList_Append(res, op) < 0) { |
| 1775 | Py_DECREF(res); |
| 1776 | return NULL; |
| 1777 | } |
| 1778 | op = op->_ob_next; |
| 1779 | } |
| 1780 | return res; |
| 1781 | } |
| 1782 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1783 | #endif |
Guido van Rossum | 97ead3f | 1996-01-12 01:24:09 +0000 | [diff] [blame] | 1784 | |
| 1785 | |
| 1786 | /* Hack to force loading of cobject.o */ |
Guido van Rossum | da9c271 | 1996-12-05 21:58:58 +0000 | [diff] [blame] | 1787 | PyTypeObject *_Py_cobject_hack = &PyCObject_Type; |
Guido van Rossum | 84a9032 | 1996-05-22 16:34:47 +0000 | [diff] [blame] | 1788 | |
| 1789 | |
| 1790 | /* Hack to force loading of abstract.o */ |
Jeremy Hylton | 6253f83 | 2000-07-12 12:56:19 +0000 | [diff] [blame] | 1791 | int (*_Py_abstract_hack)(PyObject *) = &PyObject_Size; |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1792 | |
| 1793 | |
Andrew M. Kuchling | 1582a3a | 2000-08-16 12:27:23 +0000 | [diff] [blame] | 1794 | /* Python's malloc wrappers (see pymem.h) */ |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1795 | |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 1796 | void * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1797 | PyMem_Malloc(size_t nbytes) |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1798 | { |
| 1799 | #if _PyMem_EXTRA > 0 |
| 1800 | if (nbytes == 0) |
| 1801 | nbytes = _PyMem_EXTRA; |
| 1802 | #endif |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1803 | return PyMem_MALLOC(nbytes); |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1804 | } |
| 1805 | |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 1806 | void * |
| 1807 | PyMem_Realloc(void *p, size_t nbytes) |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1808 | { |
| 1809 | #if _PyMem_EXTRA > 0 |
| 1810 | if (nbytes == 0) |
| 1811 | nbytes = _PyMem_EXTRA; |
| 1812 | #endif |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1813 | return PyMem_REALLOC(p, nbytes); |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1814 | } |
| 1815 | |
| 1816 | void |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 1817 | PyMem_Free(void *p) |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1818 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1819 | PyMem_FREE(p); |
| 1820 | } |
| 1821 | |
| 1822 | |
| 1823 | /* Python's object malloc wrappers (see objimpl.h) */ |
| 1824 | |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 1825 | void * |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1826 | PyObject_Malloc(size_t nbytes) |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1827 | { |
| 1828 | return PyObject_MALLOC(nbytes); |
| 1829 | } |
| 1830 | |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 1831 | void * |
| 1832 | PyObject_Realloc(void *p, size_t nbytes) |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1833 | { |
| 1834 | return PyObject_REALLOC(p, nbytes); |
| 1835 | } |
| 1836 | |
| 1837 | void |
Thomas Wouters | 334fb89 | 2000-07-25 12:56:38 +0000 | [diff] [blame] | 1838 | PyObject_Free(void *p) |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1839 | { |
| 1840 | PyObject_FREE(p); |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1841 | } |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1842 | |
| 1843 | |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 1844 | /* Hook to clear up weak references only once the _weakref module is |
| 1845 | imported. We use a dummy implementation to simplify the code at each |
| 1846 | call site instead of requiring a test for NULL. |
| 1847 | */ |
| 1848 | |
Fred Drake | b60654b | 2001-02-26 18:56:37 +0000 | [diff] [blame] | 1849 | static void |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 1850 | empty_clear_weak_refs(PyObject *o) |
| 1851 | { |
Fred Drake | b60654b | 2001-02-26 18:56:37 +0000 | [diff] [blame] | 1852 | return; |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 1853 | } |
| 1854 | |
Fred Drake | b60654b | 2001-02-26 18:56:37 +0000 | [diff] [blame] | 1855 | void (*PyObject_ClearWeakRefs)(PyObject *) = empty_clear_weak_refs; |
Fred Drake | 41deb1e | 2001-02-01 05:27:45 +0000 | [diff] [blame] | 1856 | |
| 1857 | |
| 1858 | |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1859 | /* These methods are used to control infinite recursion in repr, str, print, |
| 1860 | etc. Container objects that may recursively contain themselves, |
| 1861 | e.g. builtin dictionaries and lists, should used Py_ReprEnter() and |
| 1862 | Py_ReprLeave() to avoid infinite recursion. |
| 1863 | |
| 1864 | Py_ReprEnter() returns 0 the first time it is called for a particular |
| 1865 | object and 1 every time thereafter. It returns -1 if an exception |
| 1866 | occurred. Py_ReprLeave() has no return value. |
| 1867 | |
| 1868 | See dictobject.c and listobject.c for examples of use. |
| 1869 | */ |
| 1870 | |
| 1871 | #define KEY "Py_Repr" |
| 1872 | |
| 1873 | int |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1874 | Py_ReprEnter(PyObject *obj) |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1875 | { |
| 1876 | PyObject *dict; |
| 1877 | PyObject *list; |
| 1878 | int i; |
| 1879 | |
| 1880 | dict = PyThreadState_GetDict(); |
| 1881 | if (dict == NULL) |
| 1882 | return -1; |
| 1883 | list = PyDict_GetItemString(dict, KEY); |
| 1884 | if (list == NULL) { |
| 1885 | list = PyList_New(0); |
| 1886 | if (list == NULL) |
| 1887 | return -1; |
| 1888 | if (PyDict_SetItemString(dict, KEY, list) < 0) |
| 1889 | return -1; |
| 1890 | Py_DECREF(list); |
| 1891 | } |
| 1892 | i = PyList_GET_SIZE(list); |
| 1893 | while (--i >= 0) { |
| 1894 | if (PyList_GET_ITEM(list, i) == obj) |
| 1895 | return 1; |
| 1896 | } |
| 1897 | PyList_Append(list, obj); |
| 1898 | return 0; |
| 1899 | } |
| 1900 | |
| 1901 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1902 | Py_ReprLeave(PyObject *obj) |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1903 | { |
| 1904 | PyObject *dict; |
| 1905 | PyObject *list; |
| 1906 | int i; |
| 1907 | |
| 1908 | dict = PyThreadState_GetDict(); |
Guido van Rossum | eb90946 | 1998-04-11 15:17:34 +0000 | [diff] [blame] | 1909 | if (dict == NULL) |
| 1910 | return; |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1911 | list = PyDict_GetItemString(dict, KEY); |
Guido van Rossum | eb90946 | 1998-04-11 15:17:34 +0000 | [diff] [blame] | 1912 | if (list == NULL || !PyList_Check(list)) |
| 1913 | return; |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1914 | i = PyList_GET_SIZE(list); |
| 1915 | /* Count backwards because we always expect obj to be list[-1] */ |
| 1916 | while (--i >= 0) { |
| 1917 | if (PyList_GET_ITEM(list, i) == obj) { |
| 1918 | PyList_SetSlice(list, i, i + 1, NULL); |
| 1919 | break; |
| 1920 | } |
| 1921 | } |
| 1922 | } |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1923 | |
| 1924 | /* |
| 1925 | trashcan |
| 1926 | CT 2k0130 |
| 1927 | non-recursively destroy nested objects |
| 1928 | |
| 1929 | CT 2k0223 |
| 1930 | everything is now done in a macro. |
| 1931 | |
| 1932 | CT 2k0305 |
| 1933 | modified to use functions, after Tim Peter's suggestion. |
| 1934 | |
| 1935 | CT 2k0309 |
| 1936 | modified to restore a possible error. |
Guido van Rossum | 13ff8eb | 2000-03-25 18:39:19 +0000 | [diff] [blame] | 1937 | |
| 1938 | CT 2k0325 |
| 1939 | added better safe than sorry check for threadstate |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1940 | |
| 1941 | CT 2k0422 |
| 1942 | complete rewrite. We now build a chain via ob_type |
| 1943 | and save the limited number of types in ob_refcnt. |
| 1944 | This is perfect since we don't need any memory. |
| 1945 | A patch for free-threading would need just a lock. |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1946 | */ |
| 1947 | |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1948 | #define Py_TRASHCAN_TUPLE 1 |
| 1949 | #define Py_TRASHCAN_LIST 2 |
| 1950 | #define Py_TRASHCAN_DICT 3 |
| 1951 | #define Py_TRASHCAN_FRAME 4 |
| 1952 | #define Py_TRASHCAN_TRACEBACK 5 |
| 1953 | /* extend here if other objects want protection */ |
| 1954 | |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1955 | int _PyTrash_delete_nesting = 0; |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1956 | |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1957 | PyObject * _PyTrash_delete_later = NULL; |
| 1958 | |
| 1959 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1960 | _PyTrash_deposit_object(PyObject *op) |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1961 | { |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1962 | int typecode; |
Guido van Rossum | 13ff8eb | 2000-03-25 18:39:19 +0000 | [diff] [blame] | 1963 | |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1964 | if (PyTuple_Check(op)) |
| 1965 | typecode = Py_TRASHCAN_TUPLE; |
| 1966 | else if (PyList_Check(op)) |
| 1967 | typecode = Py_TRASHCAN_LIST; |
| 1968 | else if (PyDict_Check(op)) |
| 1969 | typecode = Py_TRASHCAN_DICT; |
| 1970 | else if (PyFrame_Check(op)) |
| 1971 | typecode = Py_TRASHCAN_FRAME; |
| 1972 | else if (PyTraceBack_Check(op)) |
| 1973 | typecode = Py_TRASHCAN_TRACEBACK; |
Moshe Zadka | cf703f0 | 2000-08-04 15:36:13 +0000 | [diff] [blame] | 1974 | else /* We have a bug here -- those are the only types in GC */ { |
| 1975 | Py_FatalError("Type not supported in GC -- internal bug"); |
| 1976 | return; /* pacify compiler -- execution never here */ |
| 1977 | } |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1978 | op->ob_refcnt = typecode; |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1979 | |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1980 | op->ob_type = (PyTypeObject*)_PyTrash_delete_later; |
| 1981 | _PyTrash_delete_later = op; |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1982 | } |
| 1983 | |
| 1984 | void |
Fred Drake | 100814d | 2000-07-09 15:48:49 +0000 | [diff] [blame] | 1985 | _PyTrash_destroy_chain(void) |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1986 | { |
| 1987 | while (_PyTrash_delete_later) { |
| 1988 | PyObject *shredder = _PyTrash_delete_later; |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1989 | _PyTrash_delete_later = (PyObject*) shredder->ob_type; |
| 1990 | |
| 1991 | switch (shredder->ob_refcnt) { |
| 1992 | case Py_TRASHCAN_TUPLE: |
| 1993 | shredder->ob_type = &PyTuple_Type; |
| 1994 | break; |
| 1995 | case Py_TRASHCAN_LIST: |
| 1996 | shredder->ob_type = &PyList_Type; |
| 1997 | break; |
| 1998 | case Py_TRASHCAN_DICT: |
| 1999 | shredder->ob_type = &PyDict_Type; |
| 2000 | break; |
| 2001 | case Py_TRASHCAN_FRAME: |
| 2002 | shredder->ob_type = &PyFrame_Type; |
| 2003 | break; |
| 2004 | case Py_TRASHCAN_TRACEBACK: |
| 2005 | shredder->ob_type = &PyTraceBack_Type; |
| 2006 | break; |
| 2007 | } |
| 2008 | _Py_NewReference(shredder); |
| 2009 | |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 2010 | ++_PyTrash_delete_nesting; |
| 2011 | Py_DECREF(shredder); |
| 2012 | --_PyTrash_delete_nesting; |
| 2013 | } |
| 2014 | } |
Neil Schemenauer | a35c688 | 2001-02-27 04:45:05 +0000 | [diff] [blame] | 2015 | |
| 2016 | #ifdef WITH_PYMALLOC |
| 2017 | #include "obmalloc.c" |
| 2018 | #endif |