Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 2 | Copyright (c) 2000, BeOpen.com. |
| 3 | Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
| 4 | Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
| 5 | All rights reserved. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 6 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame] | 7 | See the file "Misc/COPYRIGHT" for information on usage and |
| 8 | redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 9 | ******************************************************************/ |
| 10 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 11 | /* Generic object operations; and implementation of None (NoObject) */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 12 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 13 | #include "Python.h" |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 14 | |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 15 | #include "mymath.h" |
| 16 | |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 17 | /* just for trashcan: */ |
| 18 | #include "compile.h" |
| 19 | #include "frameobject.h" |
| 20 | #include "traceback.h" |
| 21 | |
Guido van Rossum | 6f9e433 | 1995-03-29 16:57:48 +0000 | [diff] [blame] | 22 | #if defined( Py_TRACE_REFS ) || defined( Py_REF_DEBUG ) |
Guido van Rossum | bffd683 | 2000-01-20 22:32:56 +0000 | [diff] [blame] | 23 | DL_IMPORT(long) _Py_RefTotal; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 24 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 25 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 26 | /* Object allocation routines used by NEWOBJ and NEWVAROBJ macros. |
| 27 | These are used by the individual routines for object creation. |
| 28 | Do not call them otherwise, they do not initialize the object! */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 29 | |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 30 | #ifdef COUNT_ALLOCS |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 31 | static PyTypeObject *type_list; |
Sjoerd Mullender | 842d2cc | 1993-10-15 16:18:48 +0000 | [diff] [blame] | 32 | extern int tuple_zero_allocs, fast_tuple_allocs; |
| 33 | extern int quick_int_allocs, quick_neg_int_allocs; |
Sjoerd Mullender | 3bb8a05 | 1993-10-22 12:04:32 +0000 | [diff] [blame] | 34 | extern int null_strings, one_strings; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 35 | void |
| 36 | dump_counts() |
| 37 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 38 | PyTypeObject *tp; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 39 | |
| 40 | for (tp = type_list; tp; tp = tp->tp_next) |
Sjoerd Mullender | 52c1f51 | 1993-10-25 08:40:52 +0000 | [diff] [blame] | 41 | fprintf(stderr, "%s alloc'd: %d, freed: %d, max in use: %d\n", |
| 42 | tp->tp_name, tp->tp_alloc, tp->tp_free, |
| 43 | tp->tp_maxalloc); |
| 44 | fprintf(stderr, "fast tuple allocs: %d, empty: %d\n", |
| 45 | fast_tuple_allocs, tuple_zero_allocs); |
| 46 | fprintf(stderr, "fast int allocs: pos: %d, neg: %d\n", |
| 47 | quick_int_allocs, quick_neg_int_allocs); |
| 48 | fprintf(stderr, "null strings: %d, 1-strings: %d\n", |
| 49 | null_strings, one_strings); |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 50 | } |
| 51 | |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 52 | PyObject * |
| 53 | get_counts() |
| 54 | { |
| 55 | PyTypeObject *tp; |
| 56 | PyObject *result; |
| 57 | PyObject *v; |
| 58 | |
| 59 | result = PyList_New(0); |
| 60 | if (result == NULL) |
| 61 | return NULL; |
| 62 | for (tp = type_list; tp; tp = tp->tp_next) { |
| 63 | v = Py_BuildValue("(siii)", tp->tp_name, tp->tp_alloc, |
| 64 | tp->tp_free, tp->tp_maxalloc); |
| 65 | if (v == NULL) { |
| 66 | Py_DECREF(result); |
| 67 | return NULL; |
| 68 | } |
| 69 | if (PyList_Append(result, v) < 0) { |
| 70 | Py_DECREF(v); |
| 71 | Py_DECREF(result); |
| 72 | return NULL; |
| 73 | } |
| 74 | Py_DECREF(v); |
| 75 | } |
| 76 | return result; |
| 77 | } |
| 78 | |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 79 | void |
| 80 | inc_count(tp) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 81 | PyTypeObject *tp; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 82 | { |
| 83 | if (tp->tp_alloc == 0) { |
Guido van Rossum | d8953cb | 1995-04-06 14:46:26 +0000 | [diff] [blame] | 84 | /* first time; insert in linked list */ |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 85 | if (tp->tp_next != NULL) /* sanity check */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 86 | Py_FatalError("XXX inc_count sanity check"); |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 87 | tp->tp_next = type_list; |
| 88 | type_list = tp; |
| 89 | } |
| 90 | tp->tp_alloc++; |
| 91 | if (tp->tp_alloc - tp->tp_free > tp->tp_maxalloc) |
| 92 | tp->tp_maxalloc = tp->tp_alloc - tp->tp_free; |
| 93 | } |
| 94 | #endif |
| 95 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 96 | PyObject * |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 97 | PyObject_Init(op, tp) |
Guido van Rossum | f5030ab | 1996-07-21 02:30:39 +0000 | [diff] [blame] | 98 | PyObject *op; |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 99 | PyTypeObject *tp; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 100 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 101 | if (op == NULL) { |
| 102 | PyErr_SetString(PyExc_SystemError, |
| 103 | "NULL object passed to PyObject_Init"); |
| 104 | return op; |
| 105 | } |
Jeremy Hylton | c5007aa | 2000-06-30 05:02:53 +0000 | [diff] [blame] | 106 | #ifdef WITH_CYCLE_GC |
| 107 | if (PyType_IS_GC(tp)) |
| 108 | op = (PyObject *) PyObject_FROM_GC(op); |
| 109 | #endif |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 110 | /* Any changes should be reflected in PyObject_INIT (objimpl.h) */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 111 | op->ob_type = tp; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 112 | _Py_NewReference(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 113 | return op; |
| 114 | } |
| 115 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 116 | PyVarObject * |
| 117 | PyObject_InitVar(op, tp, size) |
| 118 | PyVarObject *op; |
| 119 | PyTypeObject *tp; |
| 120 | int size; |
| 121 | { |
| 122 | if (op == NULL) { |
| 123 | PyErr_SetString(PyExc_SystemError, |
| 124 | "NULL object passed to PyObject_InitVar"); |
| 125 | return op; |
| 126 | } |
Jeremy Hylton | c5007aa | 2000-06-30 05:02:53 +0000 | [diff] [blame] | 127 | #ifdef WITH_CYCLE_GC |
| 128 | if (PyType_IS_GC(tp)) |
| 129 | op = (PyVarObject *) PyObject_FROM_GC(op); |
| 130 | #endif |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 131 | /* Any changes should be reflected in PyObject_INIT_VAR */ |
| 132 | op->ob_size = size; |
| 133 | op->ob_type = tp; |
| 134 | _Py_NewReference((PyObject *)op); |
| 135 | return op; |
| 136 | } |
| 137 | |
| 138 | PyObject * |
| 139 | _PyObject_New(tp) |
| 140 | PyTypeObject *tp; |
| 141 | { |
| 142 | PyObject *op; |
| 143 | op = (PyObject *) PyObject_MALLOC(_PyObject_SIZE(tp)); |
| 144 | if (op == NULL) |
| 145 | return PyErr_NoMemory(); |
Jeremy Hylton | c5007aa | 2000-06-30 05:02:53 +0000 | [diff] [blame] | 146 | #ifdef WITH_CYCLE_GC |
| 147 | if (PyType_IS_GC(tp)) |
| 148 | op = (PyObject *) PyObject_FROM_GC(op); |
| 149 | #endif |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 150 | return PyObject_INIT(op, tp); |
| 151 | } |
| 152 | |
Guido van Rossum | d0c87ee | 1997-05-15 21:31:03 +0000 | [diff] [blame] | 153 | PyVarObject * |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 154 | _PyObject_NewVar(tp, size) |
| 155 | PyTypeObject *tp; |
Guido van Rossum | 2497ead | 1995-02-10 17:00:27 +0000 | [diff] [blame] | 156 | int size; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 157 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 158 | PyVarObject *op; |
| 159 | op = (PyVarObject *) PyObject_MALLOC(_PyObject_VAR_SIZE(tp, size)); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 160 | if (op == NULL) |
Guido van Rossum | d0c87ee | 1997-05-15 21:31:03 +0000 | [diff] [blame] | 161 | return (PyVarObject *)PyErr_NoMemory(); |
Jeremy Hylton | c5007aa | 2000-06-30 05:02:53 +0000 | [diff] [blame] | 162 | #ifdef WITH_CYCLE_GC |
| 163 | if (PyType_IS_GC(tp)) |
| 164 | op = (PyVarObject *) PyObject_FROM_GC(op); |
| 165 | #endif |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 166 | return PyObject_INIT_VAR(op, tp, size); |
| 167 | } |
| 168 | |
| 169 | void |
| 170 | _PyObject_Del(op) |
| 171 | PyObject *op; |
| 172 | { |
Jeremy Hylton | c5007aa | 2000-06-30 05:02:53 +0000 | [diff] [blame] | 173 | #ifdef WITH_CYCLE_GC |
Guido van Rossum | 4cc6ac7 | 2000-07-01 01:00:38 +0000 | [diff] [blame^] | 174 | if (op && PyType_IS_GC(op->ob_type)) { |
| 175 | op = (PyObject *) PyObject_AS_GC(op); |
Jeremy Hylton | c5007aa | 2000-06-30 05:02:53 +0000 | [diff] [blame] | 176 | } |
Guido van Rossum | 4cc6ac7 | 2000-07-01 01:00:38 +0000 | [diff] [blame^] | 177 | #endif |
| 178 | PyObject_FREE(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 179 | } |
| 180 | |
Jeremy Hylton | c5007aa | 2000-06-30 05:02:53 +0000 | [diff] [blame] | 181 | #ifndef WITH_CYCLE_GC |
| 182 | /* extension modules might need these */ |
| 183 | void _PyGC_Insert(PyObject *op) { } |
| 184 | void _PyGC_Remove(PyObject *op) { } |
| 185 | #endif |
| 186 | |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 187 | int |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 188 | PyObject_Print(op, fp, flags) |
| 189 | PyObject *op; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 190 | FILE *fp; |
| 191 | int flags; |
| 192 | { |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 193 | int ret = 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 194 | if (PyErr_CheckSignals()) |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 195 | return -1; |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 196 | #ifdef USE_STACKCHECK |
| 197 | if (PyOS_CheckStack()) { |
| 198 | PyErr_SetString(PyExc_MemoryError, "Stack overflow"); |
| 199 | return -1; |
| 200 | } |
| 201 | #endif |
Guido van Rossum | 687ef6e | 2000-01-12 16:28:58 +0000 | [diff] [blame] | 202 | clearerr(fp); /* Clear any previous error condition */ |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 203 | if (op == NULL) { |
| 204 | fprintf(fp, "<nil>"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 205 | } |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 206 | else { |
| 207 | if (op->ob_refcnt <= 0) |
Fred Drake | a44d353 | 2000-06-30 15:01:00 +0000 | [diff] [blame] | 208 | fprintf(fp, "<refcnt %u at %p>", |
| 209 | op->ob_refcnt, op); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 210 | else if (op->ob_type->tp_print == NULL) { |
| 211 | if (op->ob_type->tp_repr == NULL) { |
Fred Drake | a44d353 | 2000-06-30 15:01:00 +0000 | [diff] [blame] | 212 | fprintf(fp, "<%s object at %p>", |
| 213 | op->ob_type->tp_name, op); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 214 | } |
| 215 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 216 | PyObject *s; |
| 217 | if (flags & Py_PRINT_RAW) |
| 218 | s = PyObject_Str(op); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 219 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 220 | s = PyObject_Repr(op); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 221 | if (s == NULL) |
| 222 | ret = -1; |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 223 | else { |
Guido van Rossum | 565798d | 1998-04-21 22:25:01 +0000 | [diff] [blame] | 224 | ret = PyObject_Print(s, fp, |
| 225 | Py_PRINT_RAW); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 226 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 227 | Py_XDECREF(s); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 228 | } |
| 229 | } |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 230 | else |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 231 | ret = (*op->ob_type->tp_print)(op, fp, flags); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 232 | } |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 233 | if (ret == 0) { |
| 234 | if (ferror(fp)) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 235 | PyErr_SetFromErrno(PyExc_IOError); |
Guido van Rossum | 278ef59 | 1991-07-27 21:40:24 +0000 | [diff] [blame] | 236 | clearerr(fp); |
| 237 | ret = -1; |
| 238 | } |
| 239 | } |
| 240 | return ret; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 241 | } |
| 242 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 243 | PyObject * |
| 244 | PyObject_Repr(v) |
| 245 | PyObject *v; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 246 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 247 | if (PyErr_CheckSignals()) |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 248 | return NULL; |
Guido van Rossum | 9b00dfa | 1998-04-28 16:06:54 +0000 | [diff] [blame] | 249 | #ifdef USE_STACKCHECK |
| 250 | if (PyOS_CheckStack()) { |
| 251 | PyErr_SetString(PyExc_MemoryError, "Stack overflow"); |
| 252 | return NULL; |
| 253 | } |
| 254 | #endif |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 255 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 256 | return PyString_FromString("<NULL>"); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 257 | else if (v->ob_type->tp_repr == NULL) { |
| 258 | char buf[120]; |
Fred Drake | a44d353 | 2000-06-30 15:01:00 +0000 | [diff] [blame] | 259 | sprintf(buf, "<%.80s object at %p>", |
| 260 | v->ob_type->tp_name, v); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 261 | return PyString_FromString(buf); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 262 | } |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 263 | else { |
| 264 | PyObject *res; |
| 265 | res = (*v->ob_type->tp_repr)(v); |
| 266 | if (res == NULL) |
| 267 | return NULL; |
| 268 | if (!PyString_Check(res)) { |
| 269 | PyErr_Format(PyExc_TypeError, |
Guido van Rossum | 5db862d | 2000-04-10 12:46:51 +0000 | [diff] [blame] | 270 | "__repr__ returned non-string (type %.200s)", |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 271 | res->ob_type->tp_name); |
| 272 | Py_DECREF(res); |
| 273 | return NULL; |
| 274 | } |
| 275 | return res; |
| 276 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 277 | } |
| 278 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 279 | PyObject * |
| 280 | PyObject_Str(v) |
| 281 | PyObject *v; |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 282 | { |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 283 | PyObject *res; |
| 284 | |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 285 | if (v == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 286 | return PyString_FromString("<NULL>"); |
| 287 | else if (PyString_Check(v)) { |
| 288 | Py_INCREF(v); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 289 | return v; |
| 290 | } |
Guido van Rossum | 32b582b | 1995-01-17 16:35:13 +0000 | [diff] [blame] | 291 | else if (v->ob_type->tp_str != NULL) |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 292 | res = (*v->ob_type->tp_str)(v); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 293 | else { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 294 | PyObject *func; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 295 | if (!PyInstance_Check(v) || |
| 296 | (func = PyObject_GetAttrString(v, "__str__")) == NULL) { |
| 297 | PyErr_Clear(); |
| 298 | return PyObject_Repr(v); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 299 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 300 | res = PyEval_CallObject(func, (PyObject *)NULL); |
| 301 | Py_DECREF(func); |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 302 | } |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 303 | if (res == NULL) |
| 304 | return NULL; |
| 305 | if (!PyString_Check(res)) { |
| 306 | PyErr_Format(PyExc_TypeError, |
Guido van Rossum | 5db862d | 2000-04-10 12:46:51 +0000 | [diff] [blame] | 307 | "__str__ returned non-string (type %.200s)", |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 308 | res->ob_type->tp_name); |
| 309 | Py_DECREF(res); |
| 310 | return NULL; |
| 311 | } |
| 312 | return res; |
Guido van Rossum | c600411 | 1993-11-05 10:22:19 +0000 | [diff] [blame] | 313 | } |
| 314 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 315 | static PyObject * |
Guido van Rossum | 2056684 | 1995-01-12 11:26:10 +0000 | [diff] [blame] | 316 | do_cmp(v, w) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 317 | PyObject *v, *w; |
Guido van Rossum | 2056684 | 1995-01-12 11:26:10 +0000 | [diff] [blame] | 318 | { |
Guido van Rossum | c8b6df9 | 1997-05-23 00:06:51 +0000 | [diff] [blame] | 319 | long c; |
Guido van Rossum | 2056684 | 1995-01-12 11:26:10 +0000 | [diff] [blame] | 320 | /* __rcmp__ actually won't be called unless __cmp__ isn't defined, |
| 321 | because the check in cmpobject() reverses the objects first. |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 322 | This is intentional -- it makes no sense to define cmp(x,y) |
| 323 | different than -cmp(y,x). */ |
| 324 | if (PyInstance_Check(v) || PyInstance_Check(w)) |
| 325 | return PyInstance_DoBinOp(v, w, "__cmp__", "__rcmp__", do_cmp); |
Guido van Rossum | c8b6df9 | 1997-05-23 00:06:51 +0000 | [diff] [blame] | 326 | c = PyObject_Compare(v, w); |
| 327 | if (c && PyErr_Occurred()) |
| 328 | return NULL; |
| 329 | return PyInt_FromLong(c); |
Guido van Rossum | 2056684 | 1995-01-12 11:26:10 +0000 | [diff] [blame] | 330 | } |
| 331 | |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 332 | PyObject *_PyCompareState_Key; |
| 333 | |
| 334 | /* _PyCompareState_nesting is incremented beforing call compare (for |
| 335 | some types) and decremented on exit. If the count exceeds the |
| 336 | nesting limit, enable code to detect circular data structures. |
| 337 | */ |
| 338 | #define NESTING_LIMIT 500 |
| 339 | int _PyCompareState_nesting = 0; |
| 340 | |
| 341 | static PyObject* |
| 342 | get_inprogress_dict() |
| 343 | { |
| 344 | PyObject *tstate_dict, *inprogress; |
| 345 | |
| 346 | tstate_dict = PyThreadState_GetDict(); |
| 347 | if (tstate_dict == NULL) { |
| 348 | PyErr_BadInternalCall(); |
| 349 | return NULL; |
| 350 | } |
| 351 | inprogress = PyDict_GetItem(tstate_dict, _PyCompareState_Key); |
| 352 | if (inprogress == NULL) { |
| 353 | PyErr_Clear(); |
| 354 | inprogress = PyDict_New(); |
| 355 | if (inprogress == NULL) |
| 356 | return NULL; |
| 357 | if (PyDict_SetItem(tstate_dict, _PyCompareState_Key, |
| 358 | inprogress) == -1) { |
| 359 | Py_DECREF(inprogress); |
| 360 | return NULL; |
| 361 | } |
Jeremy Hylton | a251ea0 | 2000-06-09 16:20:39 +0000 | [diff] [blame] | 362 | Py_DECREF(inprogress); |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 363 | } |
| 364 | return inprogress; |
| 365 | } |
| 366 | |
| 367 | static PyObject * |
| 368 | make_pair(v, w) |
| 369 | PyObject *v, *w; |
| 370 | { |
| 371 | PyObject *pair; |
| 372 | |
| 373 | pair = PyTuple_New(2); |
| 374 | if (pair == NULL) { |
| 375 | return NULL; |
| 376 | } |
Guido van Rossum | ad89bbc | 2000-06-28 21:57:18 +0000 | [diff] [blame] | 377 | if (v <= w) { |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 378 | PyTuple_SET_ITEM(pair, 0, PyLong_FromVoidPtr((void *)v)); |
| 379 | PyTuple_SET_ITEM(pair, 1, PyLong_FromVoidPtr((void *)w)); |
| 380 | } else { |
| 381 | PyTuple_SET_ITEM(pair, 0, PyLong_FromVoidPtr((void *)w)); |
| 382 | PyTuple_SET_ITEM(pair, 1, PyLong_FromVoidPtr((void *)v)); |
| 383 | } |
| 384 | return pair; |
| 385 | } |
| 386 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 387 | int |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 388 | PyObject_Compare(v, w) |
| 389 | PyObject *v, *w; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 390 | { |
Guido van Rossum | cd5a5f6 | 1998-06-09 18:58:44 +0000 | [diff] [blame] | 391 | PyTypeObject *vtp, *wtp; |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 392 | int result; |
| 393 | |
Guido van Rossum | c8b6df9 | 1997-05-23 00:06:51 +0000 | [diff] [blame] | 394 | if (v == NULL || w == NULL) { |
| 395 | PyErr_BadInternalCall(); |
| 396 | return -1; |
| 397 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 398 | if (v == w) |
| 399 | return 0; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 400 | if (PyInstance_Check(v) || PyInstance_Check(w)) { |
| 401 | PyObject *res; |
Guido van Rossum | 2056684 | 1995-01-12 11:26:10 +0000 | [diff] [blame] | 402 | int c; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 403 | if (!PyInstance_Check(v)) |
| 404 | return -PyObject_Compare(w, v); |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 405 | if (++_PyCompareState_nesting > NESTING_LIMIT) { |
| 406 | PyObject *inprogress, *pair; |
| 407 | |
| 408 | inprogress = get_inprogress_dict(); |
| 409 | if (inprogress == NULL) { |
| 410 | return -1; |
| 411 | } |
| 412 | pair = make_pair(v, w); |
| 413 | if (PyDict_GetItem(inprogress, pair)) { |
| 414 | /* already comparing these objects. assume |
| 415 | they're equal until shown otherwise */ |
| 416 | Py_DECREF(pair); |
| 417 | --_PyCompareState_nesting; |
| 418 | return 0; |
| 419 | } |
| 420 | if (PyDict_SetItem(inprogress, pair, pair) == -1) { |
| 421 | return -1; |
| 422 | } |
| 423 | res = do_cmp(v, w); |
| 424 | _PyCompareState_nesting--; |
| 425 | /* XXX DelItem shouldn't fail */ |
| 426 | PyDict_DelItem(inprogress, pair); |
| 427 | Py_DECREF(pair); |
| 428 | } else { |
| 429 | res = do_cmp(v, w); |
| 430 | } |
Guido van Rossum | c8b6df9 | 1997-05-23 00:06:51 +0000 | [diff] [blame] | 431 | if (res == NULL) |
| 432 | return -1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 433 | if (!PyInt_Check(res)) { |
| 434 | Py_DECREF(res); |
Guido van Rossum | c8b6df9 | 1997-05-23 00:06:51 +0000 | [diff] [blame] | 435 | PyErr_SetString(PyExc_TypeError, |
| 436 | "comparison did not return an int"); |
| 437 | return -1; |
Guido van Rossum | 2056684 | 1995-01-12 11:26:10 +0000 | [diff] [blame] | 438 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 439 | c = PyInt_AsLong(res); |
| 440 | Py_DECREF(res); |
Guido van Rossum | 2056684 | 1995-01-12 11:26:10 +0000 | [diff] [blame] | 441 | return (c < 0) ? -1 : (c > 0) ? 1 : 0; |
| 442 | } |
Guido van Rossum | cd5a5f6 | 1998-06-09 18:58:44 +0000 | [diff] [blame] | 443 | if ((vtp = v->ob_type) != (wtp = w->ob_type)) { |
| 444 | char *vname = vtp->tp_name; |
| 445 | char *wname = wtp->tp_name; |
Guido van Rossum | b4db194 | 1998-07-21 21:56:41 +0000 | [diff] [blame] | 446 | if (vtp->tp_as_number != NULL && wtp->tp_as_number != NULL) { |
Guido van Rossum | 242c642 | 1997-11-19 16:03:17 +0000 | [diff] [blame] | 447 | int err; |
| 448 | err = PyNumber_CoerceEx(&v, &w); |
| 449 | if (err < 0) |
Guido van Rossum | c8b6df9 | 1997-05-23 00:06:51 +0000 | [diff] [blame] | 450 | return -1; |
Guido van Rossum | 242c642 | 1997-11-19 16:03:17 +0000 | [diff] [blame] | 451 | else if (err == 0) { |
Guido van Rossum | b4db194 | 1998-07-21 21:56:41 +0000 | [diff] [blame] | 452 | int cmp; |
| 453 | vtp = v->ob_type; |
| 454 | if (vtp->tp_compare == NULL) |
| 455 | cmp = (v < w) ? -1 : 1; |
| 456 | else |
| 457 | cmp = (*vtp->tp_compare)(v, w); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 458 | Py_DECREF(v); |
| 459 | Py_DECREF(w); |
Guido van Rossum | 9fb0368 | 1991-07-01 18:48:04 +0000 | [diff] [blame] | 460 | return cmp; |
| 461 | } |
| 462 | } |
Guido van Rossum | b244f69 | 2000-04-10 13:42:33 +0000 | [diff] [blame] | 463 | else if (PyUnicode_Check(v) || PyUnicode_Check(w)) { |
| 464 | int result = PyUnicode_Compare(v, w); |
| 465 | if (result == -1 && PyErr_Occurred() && |
| 466 | PyErr_ExceptionMatches(PyExc_TypeError)) |
| 467 | /* TypeErrors are ignored: if Unicode coercion |
| 468 | fails due to one of the arguments not |
| 469 | having the right type, we continue as |
| 470 | defined by the coercion protocol (see |
| 471 | above). Luckily, decoding errors are |
| 472 | reported as ValueErrors and are not masked |
| 473 | by this technique. */ |
| 474 | PyErr_Clear(); |
| 475 | else |
| 476 | return result; |
| 477 | } |
Guido van Rossum | cd5a5f6 | 1998-06-09 18:58:44 +0000 | [diff] [blame] | 478 | else if (vtp->tp_as_number != NULL) |
| 479 | vname = ""; |
| 480 | else if (wtp->tp_as_number != NULL) |
| 481 | wname = ""; |
| 482 | /* Numerical types compare smaller than all other types */ |
| 483 | return strcmp(vname, wname); |
Guido van Rossum | 9fb0368 | 1991-07-01 18:48:04 +0000 | [diff] [blame] | 484 | } |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 485 | if (vtp->tp_compare == NULL) { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 486 | return (v < w) ? -1 : 1; |
Jeremy Hylton | 4a3dd2d | 2000-04-14 19:13:24 +0000 | [diff] [blame] | 487 | } |
| 488 | if (++_PyCompareState_nesting > NESTING_LIMIT |
| 489 | && (vtp->tp_as_mapping |
| 490 | || (vtp->tp_as_sequence && !PyString_Check(v)))) { |
| 491 | PyObject *inprogress, *pair; |
| 492 | |
| 493 | inprogress = get_inprogress_dict(); |
| 494 | if (inprogress == NULL) { |
| 495 | return -1; |
| 496 | } |
| 497 | pair = make_pair(v, w); |
| 498 | if (PyDict_GetItem(inprogress, pair)) { |
| 499 | /* already comparing these objects. assume |
| 500 | they're equal until shown otherwise */ |
| 501 | _PyCompareState_nesting--; |
| 502 | Py_DECREF(pair); |
| 503 | return 0; |
| 504 | } |
| 505 | if (PyDict_SetItem(inprogress, pair, pair) == -1) { |
| 506 | return -1; |
| 507 | } |
| 508 | result = (*vtp->tp_compare)(v, w); |
| 509 | _PyCompareState_nesting--; |
| 510 | PyDict_DelItem(inprogress, pair); /* XXX shouldn't fail */ |
| 511 | Py_DECREF(pair); |
| 512 | } else { |
| 513 | result = (*vtp->tp_compare)(v, w); |
| 514 | } |
| 515 | return result; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 516 | } |
| 517 | |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 518 | |
| 519 | /* Set of hash utility functions to help maintaining the invariant that |
| 520 | iff a==b then hash(a)==hash(b) |
| 521 | |
| 522 | All the utility functions (_Py_Hash*()) return "-1" to signify an error. |
| 523 | */ |
| 524 | |
| 525 | long |
| 526 | _Py_HashDouble(v) |
| 527 | double v; |
| 528 | { |
| 529 | /* Use frexp to get at the bits in the double. |
| 530 | * Since the VAX D double format has 56 mantissa bits, which is the |
| 531 | * most of any double format in use, each of these parts may have as |
| 532 | * many as (but no more than) 56 significant bits. |
| 533 | * So, assuming sizeof(long) >= 4, each part can be broken into two longs; |
| 534 | * frexp and multiplication are used to do that. |
| 535 | * Also, since the Cray double format has 15 exponent bits, which is the |
| 536 | * most of any double format in use, shifting the exponent field left by |
| 537 | * 15 won't overflow a long (again assuming sizeof(long) >= 4). |
| 538 | */ |
| 539 | int expo; |
| 540 | long hipart; |
| 541 | |
| 542 | v = frexp(v, &expo); |
| 543 | v = v * 2147483648.0; /* 2**31 */ |
| 544 | hipart = (long)v; /* Take the top 32 bits */ |
| 545 | v = (v - (double)hipart) * 2147483648.0; /* Get the next 32 bits */ |
| 546 | |
| 547 | return hipart + (long)v + (expo << 15); /* Combine everything */ |
| 548 | } |
| 549 | |
| 550 | long |
| 551 | _Py_HashPointer(p) |
| 552 | void *p; |
| 553 | { |
| 554 | #if SIZEOF_LONG >= SIZEOF_VOID_P |
| 555 | return (long)p; |
| 556 | #else |
| 557 | /* convert to a Python long and hash that */ |
| 558 | PyObject* longobj; |
| 559 | long x; |
| 560 | |
| 561 | if ((longobj = PyLong_FromVoidPtr(p)) == NULL) { |
| 562 | x = -1; |
| 563 | goto finally; |
| 564 | } |
| 565 | x = PyObject_Hash(longobj); |
| 566 | |
| 567 | finally: |
| 568 | Py_XDECREF(longobj); |
| 569 | return x; |
| 570 | #endif |
| 571 | } |
| 572 | |
| 573 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 574 | long |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 575 | PyObject_Hash(v) |
| 576 | PyObject *v; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 577 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 578 | PyTypeObject *tp = v->ob_type; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 579 | if (tp->tp_hash != NULL) |
| 580 | return (*tp->tp_hash)(v); |
Fred Drake | 13634cf | 2000-06-29 19:17:04 +0000 | [diff] [blame] | 581 | if (tp->tp_compare == NULL) { |
| 582 | return _Py_HashPointer(v); /* Use address as hash value */ |
| 583 | } |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 584 | /* 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] | 585 | PyErr_SetString(PyExc_TypeError, "unhashable type"); |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 586 | return -1; |
| 587 | } |
| 588 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 589 | PyObject * |
| 590 | PyObject_GetAttrString(v, name) |
| 591 | PyObject *v; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 592 | char *name; |
| 593 | { |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 594 | if (v->ob_type->tp_getattro != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 595 | PyObject *w, *res; |
Guido van Rossum | c6d0670 | 1997-01-18 07:57:16 +0000 | [diff] [blame] | 596 | w = PyString_InternFromString(name); |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 597 | if (w == NULL) |
| 598 | return NULL; |
| 599 | res = (*v->ob_type->tp_getattro)(v, w); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 600 | Py_XDECREF(w); |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 601 | return res; |
| 602 | } |
| 603 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 604 | if (v->ob_type->tp_getattr == NULL) { |
Guido van Rossum | db93516 | 1998-01-19 22:16:36 +0000 | [diff] [blame] | 605 | PyErr_Format(PyExc_AttributeError, |
| 606 | "'%.50s' object has no attribute '%.400s'", |
| 607 | v->ob_type->tp_name, |
| 608 | name); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 609 | return NULL; |
| 610 | } |
| 611 | else { |
| 612 | return (*v->ob_type->tp_getattr)(v, name); |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | int |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 617 | PyObject_HasAttrString(v, name) |
| 618 | PyObject *v; |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 619 | char *name; |
| 620 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 621 | PyObject *res = PyObject_GetAttrString(v, name); |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 622 | if (res != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 623 | Py_DECREF(res); |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 624 | return 1; |
| 625 | } |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 626 | PyErr_Clear(); |
Guido van Rossum | ed18fdc | 1993-07-11 19:55:34 +0000 | [diff] [blame] | 627 | return 0; |
| 628 | } |
| 629 | |
| 630 | int |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 631 | PyObject_SetAttrString(v, name, w) |
| 632 | PyObject *v; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 633 | char *name; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 634 | PyObject *w; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 635 | { |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 636 | if (v->ob_type->tp_setattro != NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 637 | PyObject *s; |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 638 | int res; |
Guido van Rossum | c6d0670 | 1997-01-18 07:57:16 +0000 | [diff] [blame] | 639 | s = PyString_InternFromString(name); |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 640 | if (s == NULL) |
Guido van Rossum | b7fc304 | 1996-09-11 22:51:25 +0000 | [diff] [blame] | 641 | return -1; |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 642 | res = (*v->ob_type->tp_setattro)(v, s, w); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 643 | Py_XDECREF(s); |
Guido van Rossum | d8eb1b3 | 1996-08-09 20:52:03 +0000 | [diff] [blame] | 644 | return res; |
| 645 | } |
| 646 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 647 | if (v->ob_type->tp_setattr == NULL) { |
| 648 | if (v->ob_type->tp_getattr == NULL) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 649 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 3ea7412 | 1991-12-24 13:28:03 +0000 | [diff] [blame] | 650 | "attribute-less object (assign or del)"); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 651 | else |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 652 | PyErr_SetString(PyExc_TypeError, |
Guido van Rossum | 3ea7412 | 1991-12-24 13:28:03 +0000 | [diff] [blame] | 653 | "object has read-only attributes"); |
Guido van Rossum | 73531a3 | 1990-12-20 23:12:40 +0000 | [diff] [blame] | 654 | return -1; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 655 | } |
| 656 | else { |
| 657 | return (*v->ob_type->tp_setattr)(v, name, w); |
| 658 | } |
| 659 | } |
| 660 | |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 661 | PyObject * |
| 662 | PyObject_GetAttr(v, name) |
| 663 | PyObject *v; |
| 664 | PyObject *name; |
| 665 | { |
| 666 | if (v->ob_type->tp_getattro != NULL) |
| 667 | return (*v->ob_type->tp_getattro)(v, name); |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 668 | |
| 669 | if (!PyString_Check(name)) { |
| 670 | PyErr_SetString(PyExc_TypeError, |
| 671 | "attribute name must be string"); |
| 672 | return NULL; |
| 673 | } |
| 674 | return PyObject_GetAttrString(v, PyString_AS_STRING(name)); |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 675 | } |
| 676 | |
| 677 | int |
| 678 | PyObject_HasAttr(v, name) |
| 679 | PyObject *v; |
| 680 | PyObject *name; |
| 681 | { |
| 682 | PyObject *res = PyObject_GetAttr(v, name); |
| 683 | if (res != NULL) { |
| 684 | Py_DECREF(res); |
| 685 | return 1; |
| 686 | } |
| 687 | PyErr_Clear(); |
| 688 | return 0; |
| 689 | } |
| 690 | |
| 691 | int |
| 692 | PyObject_SetAttr(v, name, value) |
| 693 | PyObject *v; |
| 694 | PyObject *name; |
| 695 | PyObject *value; |
| 696 | { |
| 697 | int err; |
| 698 | Py_INCREF(name); |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 699 | if (PyString_Check(name)) |
| 700 | PyString_InternInPlace(&name); |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 701 | if (v->ob_type->tp_setattro != NULL) |
| 702 | err = (*v->ob_type->tp_setattro)(v, name, value); |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 703 | else if (PyString_Check(name)) { |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 704 | err = PyObject_SetAttrString( |
Jeremy Hylton | 99a8f90 | 2000-06-23 14:36:32 +0000 | [diff] [blame] | 705 | v, PyString_AS_STRING(name), value); |
| 706 | } |
| 707 | else { |
| 708 | PyErr_SetString(PyExc_TypeError, |
| 709 | "attribute name must be string"); |
| 710 | err = -1; |
| 711 | } |
Guido van Rossum | 98ff96a | 1997-05-20 18:34:44 +0000 | [diff] [blame] | 712 | Py_DECREF(name); |
| 713 | return err; |
| 714 | } |
| 715 | |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 716 | /* Test a value used as condition, e.g., in a for or if statement. |
| 717 | Return -1 if an error occurred */ |
| 718 | |
| 719 | int |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 720 | PyObject_IsTrue(v) |
| 721 | PyObject *v; |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 722 | { |
| 723 | int res; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 724 | if (v == Py_None) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 725 | res = 0; |
Guido van Rossum | 1c4f458 | 1998-05-22 00:53:24 +0000 | [diff] [blame] | 726 | else if (v->ob_type->tp_as_number != NULL && |
| 727 | v->ob_type->tp_as_number->nb_nonzero != NULL) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 728 | res = (*v->ob_type->tp_as_number->nb_nonzero)(v); |
Guido van Rossum | 1c4f458 | 1998-05-22 00:53:24 +0000 | [diff] [blame] | 729 | else if (v->ob_type->tp_as_mapping != NULL && |
| 730 | v->ob_type->tp_as_mapping->mp_length != NULL) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 731 | res = (*v->ob_type->tp_as_mapping->mp_length)(v); |
Guido van Rossum | 1c4f458 | 1998-05-22 00:53:24 +0000 | [diff] [blame] | 732 | else if (v->ob_type->tp_as_sequence != NULL && |
| 733 | v->ob_type->tp_as_sequence->sq_length != NULL) |
Guido van Rossum | 6ac258d | 1993-05-12 08:24:20 +0000 | [diff] [blame] | 734 | res = (*v->ob_type->tp_as_sequence->sq_length)(v); |
| 735 | else |
| 736 | res = 1; |
| 737 | if (res > 0) |
| 738 | res = 1; |
| 739 | return res; |
| 740 | } |
| 741 | |
Guido van Rossum | c3d3f96 | 1998-04-09 17:53:59 +0000 | [diff] [blame] | 742 | /* equivalent of 'not v' |
| 743 | Return -1 if an error occurred */ |
| 744 | |
| 745 | int |
| 746 | PyObject_Not(v) |
| 747 | PyObject *v; |
| 748 | { |
| 749 | int res; |
| 750 | res = PyObject_IsTrue(v); |
| 751 | if (res < 0) |
| 752 | return res; |
| 753 | return res == 0; |
| 754 | } |
| 755 | |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 756 | /* Coerce two numeric types to the "larger" one. |
| 757 | Increment the reference count on each argument. |
| 758 | Return -1 and raise an exception if no coercion is possible |
| 759 | (and then no reference count is incremented). |
| 760 | */ |
| 761 | |
| 762 | int |
Guido van Rossum | 242c642 | 1997-11-19 16:03:17 +0000 | [diff] [blame] | 763 | PyNumber_CoerceEx(pv, pw) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 764 | PyObject **pv, **pw; |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 765 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 766 | register PyObject *v = *pv; |
| 767 | register PyObject *w = *pw; |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 768 | int res; |
| 769 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 770 | if (v->ob_type == w->ob_type && !PyInstance_Check(v)) { |
| 771 | Py_INCREF(v); |
| 772 | Py_INCREF(w); |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 773 | return 0; |
| 774 | } |
| 775 | if (v->ob_type->tp_as_number && v->ob_type->tp_as_number->nb_coerce) { |
| 776 | res = (*v->ob_type->tp_as_number->nb_coerce)(pv, pw); |
| 777 | if (res <= 0) |
| 778 | return res; |
| 779 | } |
| 780 | if (w->ob_type->tp_as_number && w->ob_type->tp_as_number->nb_coerce) { |
| 781 | res = (*w->ob_type->tp_as_number->nb_coerce)(pw, pv); |
| 782 | if (res <= 0) |
| 783 | return res; |
| 784 | } |
Guido van Rossum | 242c642 | 1997-11-19 16:03:17 +0000 | [diff] [blame] | 785 | return 1; |
| 786 | } |
| 787 | |
| 788 | int |
| 789 | PyNumber_Coerce(pv, pw) |
| 790 | PyObject **pv, **pw; |
| 791 | { |
| 792 | int err = PyNumber_CoerceEx(pv, pw); |
| 793 | if (err <= 0) |
| 794 | return err; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 795 | PyErr_SetString(PyExc_TypeError, "number coercion failed"); |
Guido van Rossum | 5524a59 | 1995-01-10 15:26:20 +0000 | [diff] [blame] | 796 | return -1; |
| 797 | } |
| 798 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 799 | |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 800 | /* Test whether an object can be called */ |
| 801 | |
| 802 | int |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 803 | PyCallable_Check(x) |
| 804 | PyObject *x; |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 805 | { |
| 806 | if (x == NULL) |
| 807 | return 0; |
| 808 | if (x->ob_type->tp_call != NULL || |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 809 | PyFunction_Check(x) || |
| 810 | PyMethod_Check(x) || |
| 811 | PyCFunction_Check(x) || |
| 812 | PyClass_Check(x)) |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 813 | return 1; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 814 | if (PyInstance_Check(x)) { |
| 815 | PyObject *call = PyObject_GetAttrString(x, "__call__"); |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 816 | if (call == NULL) { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 817 | PyErr_Clear(); |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 818 | return 0; |
| 819 | } |
| 820 | /* Could test recursively but don't, for fear of endless |
| 821 | recursion if some joker sets self.__call__ = self */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 822 | Py_DECREF(call); |
Guido van Rossum | 49b11fe | 1995-01-26 00:38:22 +0000 | [diff] [blame] | 823 | return 1; |
| 824 | } |
| 825 | return 0; |
| 826 | } |
| 827 | |
| 828 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 829 | /* |
| 830 | NoObject is usable as a non-NULL undefined value, used by the macro None. |
| 831 | 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] | 832 | so there is exactly one (which is indestructible, by the way). |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 833 | */ |
| 834 | |
Guido van Rossum | 0c182a1 | 1992-03-27 17:26:13 +0000 | [diff] [blame] | 835 | /* ARGSUSED */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 836 | static PyObject * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 837 | none_repr(op) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 838 | PyObject *op; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 839 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 840 | return PyString_FromString("None"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 841 | } |
| 842 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 843 | static PyTypeObject PyNothing_Type = { |
| 844 | PyObject_HEAD_INIT(&PyType_Type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 845 | 0, |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 846 | "None", |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 847 | 0, |
| 848 | 0, |
| 849 | 0, /*tp_dealloc*/ /*never called*/ |
Guido van Rossum | 7066dd7 | 1992-09-17 17:54:56 +0000 | [diff] [blame] | 850 | 0, /*tp_print*/ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 851 | 0, /*tp_getattr*/ |
| 852 | 0, /*tp_setattr*/ |
| 853 | 0, /*tp_compare*/ |
Guido van Rossum | 1d5735e | 1994-08-30 08:27:36 +0000 | [diff] [blame] | 854 | (reprfunc)none_repr, /*tp_repr*/ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 855 | 0, /*tp_as_number*/ |
| 856 | 0, /*tp_as_sequence*/ |
| 857 | 0, /*tp_as_mapping*/ |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 858 | 0, /*tp_hash */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 859 | }; |
| 860 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 861 | PyObject _Py_NoneStruct = { |
| 862 | PyObject_HEAD_INIT(&PyNothing_Type) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 863 | }; |
| 864 | |
| 865 | |
Guido van Rossum | 84a9032 | 1996-05-22 16:34:47 +0000 | [diff] [blame] | 866 | #ifdef Py_TRACE_REFS |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 867 | |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 868 | static PyObject refchain = {&refchain, &refchain}; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 869 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 870 | void |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 871 | _Py_ResetReferences() |
| 872 | { |
| 873 | refchain._ob_prev = refchain._ob_next = &refchain; |
| 874 | _Py_RefTotal = 0; |
| 875 | } |
| 876 | |
| 877 | void |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 878 | _Py_NewReference(op) |
| 879 | PyObject *op; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 880 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 881 | _Py_RefTotal++; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 882 | op->ob_refcnt = 1; |
| 883 | op->_ob_next = refchain._ob_next; |
| 884 | op->_ob_prev = &refchain; |
| 885 | refchain._ob_next->_ob_prev = op; |
| 886 | refchain._ob_next = op; |
Sjoerd Mullender | a9c3c22 | 1993-10-11 12:54:31 +0000 | [diff] [blame] | 887 | #ifdef COUNT_ALLOCS |
| 888 | inc_count(op->ob_type); |
| 889 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 890 | } |
| 891 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 892 | void |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 893 | _Py_ForgetReference(op) |
| 894 | register PyObject *op; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 895 | { |
Guido van Rossum | bffd683 | 2000-01-20 22:32:56 +0000 | [diff] [blame] | 896 | #ifdef SLOW_UNREF_CHECK |
Guido van Rossum | 4c08d55 | 2000-03-10 22:55:18 +0000 | [diff] [blame] | 897 | register PyObject *p; |
Guido van Rossum | bffd683 | 2000-01-20 22:32:56 +0000 | [diff] [blame] | 898 | #endif |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 899 | if (op->ob_refcnt < 0) |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 900 | Py_FatalError("UNREF negative refcnt"); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 901 | if (op == &refchain || |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 902 | 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] | 903 | Py_FatalError("UNREF invalid object"); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 904 | #ifdef SLOW_UNREF_CHECK |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 905 | for (p = refchain._ob_next; p != &refchain; p = p->_ob_next) { |
| 906 | if (p == op) |
| 907 | break; |
| 908 | } |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 909 | if (p == &refchain) /* Not found */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 910 | Py_FatalError("UNREF unknown object"); |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 911 | #endif |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 912 | op->_ob_next->_ob_prev = op->_ob_prev; |
| 913 | op->_ob_prev->_ob_next = op->_ob_next; |
Guido van Rossum | 2e8f614 | 1992-09-03 20:32:55 +0000 | [diff] [blame] | 914 | op->_ob_next = op->_ob_prev = NULL; |
Guido van Rossum | d8953cb | 1995-04-06 14:46:26 +0000 | [diff] [blame] | 915 | #ifdef COUNT_ALLOCS |
| 916 | op->ob_type->tp_free++; |
| 917 | #endif |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 918 | } |
| 919 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 920 | void |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 921 | _Py_Dealloc(op) |
| 922 | PyObject *op; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 923 | { |
Guido van Rossum | 9776adf | 1994-09-07 14:36:45 +0000 | [diff] [blame] | 924 | destructor dealloc = op->ob_type->tp_dealloc; |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 925 | _Py_ForgetReference(op); |
Jeremy Hylton | c5007aa | 2000-06-30 05:02:53 +0000 | [diff] [blame] | 926 | #ifndef WITH_CYCLE_GC |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 927 | if (_PyTrash_delete_nesting < PyTrash_UNWIND_LEVEL-1) |
| 928 | op->ob_type = NULL; |
Jeremy Hylton | c5007aa | 2000-06-30 05:02:53 +0000 | [diff] [blame] | 929 | #endif |
Guido van Rossum | 9776adf | 1994-09-07 14:36:45 +0000 | [diff] [blame] | 930 | (*dealloc)(op); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 931 | } |
| 932 | |
Guido van Rossum | aacdc9d | 1996-08-12 21:32:12 +0000 | [diff] [blame] | 933 | void |
Guido van Rossum | ded690f | 1996-05-24 20:48:31 +0000 | [diff] [blame] | 934 | _Py_PrintReferences(fp) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 935 | FILE *fp; |
| 936 | { |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 937 | PyObject *op; |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 938 | fprintf(fp, "Remaining objects:\n"); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 939 | for (op = refchain._ob_next; op != &refchain; op = op->_ob_next) { |
| 940 | fprintf(fp, "[%d] ", op->ob_refcnt); |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 941 | if (PyObject_Print(op, fp, 0) != 0) |
| 942 | PyErr_Clear(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 943 | putc('\n', fp); |
| 944 | } |
| 945 | } |
| 946 | |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 947 | PyObject * |
Guido van Rossum | ded690f | 1996-05-24 20:48:31 +0000 | [diff] [blame] | 948 | _Py_GetObjects(self, args) |
Sjoerd Mullender | 6ec3c65 | 1995-08-29 09:18:14 +0000 | [diff] [blame] | 949 | PyObject *self; |
| 950 | PyObject *args; |
| 951 | { |
| 952 | int i, n; |
| 953 | PyObject *t = NULL; |
| 954 | PyObject *res, *op; |
| 955 | |
| 956 | if (!PyArg_ParseTuple(args, "i|O", &n, &t)) |
| 957 | return NULL; |
| 958 | op = refchain._ob_next; |
| 959 | res = PyList_New(0); |
| 960 | if (res == NULL) |
| 961 | return NULL; |
| 962 | for (i = 0; (n == 0 || i < n) && op != &refchain; i++) { |
| 963 | while (op == self || op == args || op == res || op == t || |
| 964 | t != NULL && op->ob_type != (PyTypeObject *) t) { |
| 965 | op = op->_ob_next; |
| 966 | if (op == &refchain) |
| 967 | return res; |
| 968 | } |
| 969 | if (PyList_Append(res, op) < 0) { |
| 970 | Py_DECREF(res); |
| 971 | return NULL; |
| 972 | } |
| 973 | op = op->_ob_next; |
| 974 | } |
| 975 | return res; |
| 976 | } |
| 977 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 978 | #endif |
Guido van Rossum | 97ead3f | 1996-01-12 01:24:09 +0000 | [diff] [blame] | 979 | |
| 980 | |
| 981 | /* Hack to force loading of cobject.o */ |
Guido van Rossum | da9c271 | 1996-12-05 21:58:58 +0000 | [diff] [blame] | 982 | PyTypeObject *_Py_cobject_hack = &PyCObject_Type; |
Guido van Rossum | 84a9032 | 1996-05-22 16:34:47 +0000 | [diff] [blame] | 983 | |
| 984 | |
| 985 | /* Hack to force loading of abstract.o */ |
Guido van Rossum | c0b618a | 1997-05-02 03:12:38 +0000 | [diff] [blame] | 986 | int (*_Py_abstract_hack) Py_FPROTO((PyObject *)) = &PyObject_Length; |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 987 | |
| 988 | |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 989 | /* Python's malloc wrappers (see mymalloc.h) */ |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 990 | |
| 991 | ANY * |
| 992 | PyMem_Malloc(nbytes) |
| 993 | size_t nbytes; |
| 994 | { |
| 995 | #if _PyMem_EXTRA > 0 |
| 996 | if (nbytes == 0) |
| 997 | nbytes = _PyMem_EXTRA; |
| 998 | #endif |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 999 | return PyMem_MALLOC(nbytes); |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1000 | } |
| 1001 | |
| 1002 | ANY * |
| 1003 | PyMem_Realloc(p, nbytes) |
| 1004 | ANY *p; |
| 1005 | size_t nbytes; |
| 1006 | { |
| 1007 | #if _PyMem_EXTRA > 0 |
| 1008 | if (nbytes == 0) |
| 1009 | nbytes = _PyMem_EXTRA; |
| 1010 | #endif |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1011 | return PyMem_REALLOC(p, nbytes); |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1012 | } |
| 1013 | |
| 1014 | void |
| 1015 | PyMem_Free(p) |
| 1016 | ANY *p; |
| 1017 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 1018 | PyMem_FREE(p); |
| 1019 | } |
| 1020 | |
| 1021 | |
| 1022 | /* Python's object malloc wrappers (see objimpl.h) */ |
| 1023 | |
| 1024 | ANY * |
| 1025 | PyObject_Malloc(nbytes) |
| 1026 | size_t nbytes; |
| 1027 | { |
| 1028 | return PyObject_MALLOC(nbytes); |
| 1029 | } |
| 1030 | |
| 1031 | ANY * |
| 1032 | PyObject_Realloc(p, nbytes) |
| 1033 | ANY *p; |
| 1034 | size_t nbytes; |
| 1035 | { |
| 1036 | return PyObject_REALLOC(p, nbytes); |
| 1037 | } |
| 1038 | |
| 1039 | void |
| 1040 | PyObject_Free(p) |
| 1041 | ANY *p; |
| 1042 | { |
| 1043 | PyObject_FREE(p); |
Guido van Rossum | e09fb55 | 1997-08-05 02:04:34 +0000 | [diff] [blame] | 1044 | } |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1045 | |
| 1046 | |
| 1047 | /* These methods are used to control infinite recursion in repr, str, print, |
| 1048 | etc. Container objects that may recursively contain themselves, |
| 1049 | e.g. builtin dictionaries and lists, should used Py_ReprEnter() and |
| 1050 | Py_ReprLeave() to avoid infinite recursion. |
| 1051 | |
| 1052 | Py_ReprEnter() returns 0 the first time it is called for a particular |
| 1053 | object and 1 every time thereafter. It returns -1 if an exception |
| 1054 | occurred. Py_ReprLeave() has no return value. |
| 1055 | |
| 1056 | See dictobject.c and listobject.c for examples of use. |
| 1057 | */ |
| 1058 | |
| 1059 | #define KEY "Py_Repr" |
| 1060 | |
| 1061 | int |
| 1062 | Py_ReprEnter(obj) |
| 1063 | PyObject *obj; |
| 1064 | { |
| 1065 | PyObject *dict; |
| 1066 | PyObject *list; |
| 1067 | int i; |
| 1068 | |
| 1069 | dict = PyThreadState_GetDict(); |
| 1070 | if (dict == NULL) |
| 1071 | return -1; |
| 1072 | list = PyDict_GetItemString(dict, KEY); |
| 1073 | if (list == NULL) { |
| 1074 | list = PyList_New(0); |
| 1075 | if (list == NULL) |
| 1076 | return -1; |
| 1077 | if (PyDict_SetItemString(dict, KEY, list) < 0) |
| 1078 | return -1; |
| 1079 | Py_DECREF(list); |
| 1080 | } |
| 1081 | i = PyList_GET_SIZE(list); |
| 1082 | while (--i >= 0) { |
| 1083 | if (PyList_GET_ITEM(list, i) == obj) |
| 1084 | return 1; |
| 1085 | } |
| 1086 | PyList_Append(list, obj); |
| 1087 | return 0; |
| 1088 | } |
| 1089 | |
| 1090 | void |
| 1091 | Py_ReprLeave(obj) |
| 1092 | PyObject *obj; |
| 1093 | { |
| 1094 | PyObject *dict; |
| 1095 | PyObject *list; |
| 1096 | int i; |
| 1097 | |
| 1098 | dict = PyThreadState_GetDict(); |
Guido van Rossum | eb90946 | 1998-04-11 15:17:34 +0000 | [diff] [blame] | 1099 | if (dict == NULL) |
| 1100 | return; |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1101 | list = PyDict_GetItemString(dict, KEY); |
Guido van Rossum | eb90946 | 1998-04-11 15:17:34 +0000 | [diff] [blame] | 1102 | if (list == NULL || !PyList_Check(list)) |
| 1103 | return; |
Guido van Rossum | 8661036 | 1998-04-10 22:32:46 +0000 | [diff] [blame] | 1104 | i = PyList_GET_SIZE(list); |
| 1105 | /* Count backwards because we always expect obj to be list[-1] */ |
| 1106 | while (--i >= 0) { |
| 1107 | if (PyList_GET_ITEM(list, i) == obj) { |
| 1108 | PyList_SetSlice(list, i, i + 1, NULL); |
| 1109 | break; |
| 1110 | } |
| 1111 | } |
| 1112 | } |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1113 | |
| 1114 | /* |
| 1115 | trashcan |
| 1116 | CT 2k0130 |
| 1117 | non-recursively destroy nested objects |
| 1118 | |
| 1119 | CT 2k0223 |
| 1120 | everything is now done in a macro. |
| 1121 | |
| 1122 | CT 2k0305 |
| 1123 | modified to use functions, after Tim Peter's suggestion. |
| 1124 | |
| 1125 | CT 2k0309 |
| 1126 | modified to restore a possible error. |
Guido van Rossum | 13ff8eb | 2000-03-25 18:39:19 +0000 | [diff] [blame] | 1127 | |
| 1128 | CT 2k0325 |
| 1129 | added better safe than sorry check for threadstate |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1130 | |
| 1131 | CT 2k0422 |
| 1132 | complete rewrite. We now build a chain via ob_type |
| 1133 | and save the limited number of types in ob_refcnt. |
| 1134 | This is perfect since we don't need any memory. |
| 1135 | A patch for free-threading would need just a lock. |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1136 | */ |
| 1137 | |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1138 | #define Py_TRASHCAN_TUPLE 1 |
| 1139 | #define Py_TRASHCAN_LIST 2 |
| 1140 | #define Py_TRASHCAN_DICT 3 |
| 1141 | #define Py_TRASHCAN_FRAME 4 |
| 1142 | #define Py_TRASHCAN_TRACEBACK 5 |
| 1143 | /* extend here if other objects want protection */ |
| 1144 | |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1145 | int _PyTrash_delete_nesting = 0; |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1146 | |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1147 | PyObject * _PyTrash_delete_later = NULL; |
| 1148 | |
| 1149 | void |
| 1150 | _PyTrash_deposit_object(op) |
| 1151 | PyObject *op; |
| 1152 | { |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1153 | int typecode; |
| 1154 | PyObject *hold = _PyTrash_delete_later; |
Guido van Rossum | 13ff8eb | 2000-03-25 18:39:19 +0000 | [diff] [blame] | 1155 | |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1156 | if (PyTuple_Check(op)) |
| 1157 | typecode = Py_TRASHCAN_TUPLE; |
| 1158 | else if (PyList_Check(op)) |
| 1159 | typecode = Py_TRASHCAN_LIST; |
| 1160 | else if (PyDict_Check(op)) |
| 1161 | typecode = Py_TRASHCAN_DICT; |
| 1162 | else if (PyFrame_Check(op)) |
| 1163 | typecode = Py_TRASHCAN_FRAME; |
| 1164 | else if (PyTraceBack_Check(op)) |
| 1165 | typecode = Py_TRASHCAN_TRACEBACK; |
| 1166 | op->ob_refcnt = typecode; |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1167 | |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1168 | op->ob_type = (PyTypeObject*)_PyTrash_delete_later; |
| 1169 | _PyTrash_delete_later = op; |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1170 | } |
| 1171 | |
| 1172 | void |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1173 | _PyTrash_destroy_chain() |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1174 | { |
| 1175 | while (_PyTrash_delete_later) { |
| 1176 | PyObject *shredder = _PyTrash_delete_later; |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1177 | _PyTrash_delete_later = (PyObject*) shredder->ob_type; |
| 1178 | |
| 1179 | switch (shredder->ob_refcnt) { |
| 1180 | case Py_TRASHCAN_TUPLE: |
| 1181 | shredder->ob_type = &PyTuple_Type; |
| 1182 | break; |
| 1183 | case Py_TRASHCAN_LIST: |
| 1184 | shredder->ob_type = &PyList_Type; |
| 1185 | break; |
| 1186 | case Py_TRASHCAN_DICT: |
| 1187 | shredder->ob_type = &PyDict_Type; |
| 1188 | break; |
| 1189 | case Py_TRASHCAN_FRAME: |
| 1190 | shredder->ob_type = &PyFrame_Type; |
| 1191 | break; |
| 1192 | case Py_TRASHCAN_TRACEBACK: |
| 1193 | shredder->ob_type = &PyTraceBack_Type; |
| 1194 | break; |
| 1195 | } |
| 1196 | _Py_NewReference(shredder); |
| 1197 | |
Guido van Rossum | d724b23 | 2000-03-13 16:01:29 +0000 | [diff] [blame] | 1198 | ++_PyTrash_delete_nesting; |
| 1199 | Py_DECREF(shredder); |
| 1200 | --_PyTrash_delete_nesting; |
| 1201 | } |
| 1202 | } |
Guido van Rossum | e92e610 | 2000-04-24 15:40:53 +0000 | [diff] [blame] | 1203 | |