Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
Guido van Rossum | 6610ad9 | 1995-01-04 19:07:38 +0000 | [diff] [blame] | 2 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 3 | The Netherlands. |
Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 4 | |
| 5 | All Rights Reserved |
| 6 | |
| 7 | Permission to use, copy, modify, and distribute this software and its |
| 8 | documentation for any purpose and without fee is hereby granted, |
| 9 | provided that the above copyright notice appear in all copies and that |
| 10 | both that copyright notice and this permission notice appear in |
| 11 | supporting documentation, and that the names of Stichting Mathematisch |
| 12 | Centrum or CWI not be used in advertising or publicity pertaining to |
| 13 | distribution of the software without specific, written prior permission. |
| 14 | |
| 15 | STICHTING MATHEMATISCH CENTRUM DISCLAIMS ALL WARRANTIES WITH REGARD TO |
| 16 | THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND |
| 17 | FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH CENTRUM BE LIABLE |
| 18 | FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 19 | WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 20 | ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT |
| 21 | OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 22 | |
| 23 | ******************************************************************/ |
| 24 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 25 | /* Class object implementation */ |
| 26 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 27 | #include "allobjects.h" |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 28 | #include "structmember.h" |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 29 | |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 30 | /* Forward */ |
| 31 | static object *class_lookup PROTO((classobject *, char *, classobject **)); |
| 32 | static object *instance_getattr1 PROTO((instanceobject *, char *)); |
| 33 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 34 | object * |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 35 | newclassobject(bases, dict, name) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 36 | object *bases; /* NULL or tuple of classobjects! */ |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 37 | object *dict; |
Guido van Rossum | 9430839 | 1991-10-20 20:11:48 +0000 | [diff] [blame] | 38 | object *name; /* String; NULL if unknown */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 39 | { |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 40 | int pos; |
| 41 | object *key, *value; |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 42 | classobject *op, *dummy; |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 43 | if (dictlookup(dict, "__doc__") == NULL) { |
| 44 | if (dictinsert(dict, "__doc__", None) < 0) |
| 45 | return NULL; |
| 46 | } |
Guido van Rossum | e2966a6 | 1991-12-10 13:53:23 +0000 | [diff] [blame] | 47 | if (bases == NULL) { |
| 48 | bases = newtupleobject(0); |
| 49 | if (bases == NULL) |
Guido van Rossum | e537240 | 1993-03-16 12:15:04 +0000 | [diff] [blame] | 50 | return NULL; |
Guido van Rossum | e2966a6 | 1991-12-10 13:53:23 +0000 | [diff] [blame] | 51 | } |
| 52 | else |
| 53 | INCREF(bases); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 54 | op = NEWOBJ(classobject, &Classtype); |
Guido van Rossum | e2966a6 | 1991-12-10 13:53:23 +0000 | [diff] [blame] | 55 | if (op == NULL) { |
| 56 | DECREF(bases); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 57 | return NULL; |
Guido van Rossum | e2966a6 | 1991-12-10 13:53:23 +0000 | [diff] [blame] | 58 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 59 | op->cl_bases = bases; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 60 | INCREF(dict); |
| 61 | op->cl_dict = dict; |
Guido van Rossum | 9430839 | 1991-10-20 20:11:48 +0000 | [diff] [blame] | 62 | XINCREF(name); |
| 63 | op->cl_name = name; |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 64 | op->cl_getattr = class_lookup(op, "__getattr__", &dummy); |
| 65 | op->cl_setattr = class_lookup(op, "__setattr__", &dummy); |
| 66 | op->cl_delattr = class_lookup(op, "__delattr__", &dummy); |
| 67 | XINCREF(op->cl_getattr); |
| 68 | XINCREF(op->cl_setattr); |
| 69 | XINCREF(op->cl_delattr); |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 70 | pos = 0; |
| 71 | while (mappinggetnext(dict, &pos, &key, &value)) { |
| 72 | if (is_accessobject(value)) |
| 73 | setaccessowner(value, (object *)op); |
| 74 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 75 | return (object *) op; |
| 76 | } |
| 77 | |
| 78 | /* Class methods */ |
| 79 | |
| 80 | static void |
| 81 | class_dealloc(op) |
| 82 | classobject *op; |
| 83 | { |
Guido van Rossum | e2966a6 | 1991-12-10 13:53:23 +0000 | [diff] [blame] | 84 | DECREF(op->cl_bases); |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 85 | DECREF(op->cl_dict); |
Guido van Rossum | 9430839 | 1991-10-20 20:11:48 +0000 | [diff] [blame] | 86 | XDECREF(op->cl_name); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 87 | free((ANY *)op); |
| 88 | } |
| 89 | |
| 90 | static object * |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 91 | class_lookup(cp, name, pclass) |
| 92 | classobject *cp; |
| 93 | char *name; |
| 94 | classobject **pclass; |
| 95 | { |
| 96 | int i, n; |
| 97 | object *value = dictlookup(cp->cl_dict, name); |
| 98 | if (value != NULL) { |
| 99 | *pclass = cp; |
| 100 | return value; |
| 101 | } |
| 102 | n = gettuplesize(cp->cl_bases); |
| 103 | for (i = 0; i < n; i++) { |
| 104 | object *v = class_lookup((classobject *) |
| 105 | gettupleitem(cp->cl_bases, i), name, pclass); |
| 106 | if (v != NULL) |
| 107 | return v; |
| 108 | } |
| 109 | return NULL; |
| 110 | } |
| 111 | |
| 112 | static object * |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 113 | class_getattr(op, name) |
| 114 | register classobject *op; |
| 115 | register char *name; |
| 116 | { |
| 117 | register object *v; |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 118 | classobject *class; |
Guido van Rossum | 10393b1 | 1995-01-10 10:39:49 +0000 | [diff] [blame] | 119 | if (name[0] == '_' && name[1] == '_') { |
| 120 | if (strcmp(name, "__dict__") == 0) { |
| 121 | if (getrestricted()) { |
| 122 | err_setstr(RuntimeError, |
| 123 | "class.__dict__ not accessible in restricted mode"); |
| 124 | return NULL; |
| 125 | } |
| 126 | INCREF(op->cl_dict); |
| 127 | return op->cl_dict; |
| 128 | } |
| 129 | if (strcmp(name, "__bases__") == 0) { |
| 130 | INCREF(op->cl_bases); |
| 131 | return op->cl_bases; |
| 132 | } |
| 133 | if (strcmp(name, "__name__") == 0) { |
| 134 | if (op->cl_name == NULL) |
| 135 | v = None; |
| 136 | else |
| 137 | v = op->cl_name; |
| 138 | INCREF(v); |
| 139 | return v; |
| 140 | } |
Guido van Rossum | 9430839 | 1991-10-20 20:11:48 +0000 | [diff] [blame] | 141 | } |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 142 | v = class_lookup(op, name, &class); |
Guido van Rossum | b3f7258 | 1993-05-21 19:56:10 +0000 | [diff] [blame] | 143 | if (v == NULL) { |
| 144 | err_setstr(AttributeError, name); |
| 145 | return NULL; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 146 | } |
Guido van Rossum | b3f7258 | 1993-05-21 19:56:10 +0000 | [diff] [blame] | 147 | if (is_accessobject(v)) { |
Guido van Rossum | eb6b33a | 1993-05-25 09:38:27 +0000 | [diff] [blame] | 148 | v = getaccessvalue(v, getowner()); |
Guido van Rossum | b3f7258 | 1993-05-21 19:56:10 +0000 | [diff] [blame] | 149 | if (v == NULL) |
| 150 | return NULL; |
| 151 | } |
| 152 | else |
| 153 | INCREF(v); |
| 154 | if (is_funcobject(v)) { |
| 155 | object *w = newinstancemethodobject(v, (object *)NULL, |
| 156 | (object *)class); |
| 157 | DECREF(v); |
| 158 | v = w; |
| 159 | } |
| 160 | return v; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 161 | } |
| 162 | |
Guido van Rossum | 9430839 | 1991-10-20 20:11:48 +0000 | [diff] [blame] | 163 | static int |
| 164 | class_setattr(op, name, v) |
| 165 | classobject *op; |
| 166 | char *name; |
| 167 | object *v; |
| 168 | { |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 169 | object *ac; |
Guido van Rossum | 8dd79cf | 1992-04-05 14:24:32 +0000 | [diff] [blame] | 170 | if (name[0] == '_' && name[1] == '_') { |
| 171 | int n = strlen(name); |
| 172 | if (name[n-1] == '_' && name[n-2] == '_') { |
| 173 | err_setstr(TypeError, "read-only special attribute"); |
| 174 | return -1; |
| 175 | } |
| 176 | } |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 177 | ac = dictlookup(op->cl_dict, name); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 178 | if (ac != NULL && is_accessobject(ac)) |
Guido van Rossum | eb6b33a | 1993-05-25 09:38:27 +0000 | [diff] [blame] | 179 | return setaccessvalue(ac, getowner(), v); |
Guido van Rossum | 94472a0 | 1992-09-04 09:45:18 +0000 | [diff] [blame] | 180 | if (v == NULL) { |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 181 | int rv = dictremove(op->cl_dict, name); |
Guido van Rossum | 94472a0 | 1992-09-04 09:45:18 +0000 | [diff] [blame] | 182 | if (rv < 0) |
| 183 | err_setstr(AttributeError, |
| 184 | "delete non-existing class attribute"); |
| 185 | return rv; |
| 186 | } |
Guido van Rossum | 9430839 | 1991-10-20 20:11:48 +0000 | [diff] [blame] | 187 | else |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 188 | return dictinsert(op->cl_dict, name, v); |
Guido van Rossum | 9430839 | 1991-10-20 20:11:48 +0000 | [diff] [blame] | 189 | } |
| 190 | |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 191 | static object * |
| 192 | class_repr(op) |
| 193 | classobject *op; |
| 194 | { |
| 195 | char buf[140]; |
| 196 | char *name; |
| 197 | if (op->cl_name == NULL || !is_stringobject(op->cl_name)) |
| 198 | name = "?"; |
| 199 | else |
| 200 | name = getstringvalue(op->cl_name); |
| 201 | sprintf(buf, "<class %.100s at %lx>", name, (long)op); |
| 202 | return newstringobject(buf); |
| 203 | } |
| 204 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 205 | typeobject Classtype = { |
| 206 | OB_HEAD_INIT(&Typetype) |
| 207 | 0, |
| 208 | "class", |
| 209 | sizeof(classobject), |
| 210 | 0, |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 211 | (destructor)class_dealloc, /*tp_dealloc*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 212 | 0, /*tp_print*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 213 | (getattrfunc)class_getattr, /*tp_getattr*/ |
| 214 | (setattrfunc)class_setattr, /*tp_setattr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 215 | 0, /*tp_compare*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 216 | (reprfunc)class_repr, /*tp_repr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 217 | 0, /*tp_as_number*/ |
| 218 | 0, /*tp_as_sequence*/ |
| 219 | 0, /*tp_as_mapping*/ |
| 220 | }; |
| 221 | |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 222 | int |
| 223 | issubclass(class, base) |
| 224 | object *class; |
| 225 | object *base; |
| 226 | { |
| 227 | int i, n; |
| 228 | classobject *cp; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 229 | if (class == base) |
| 230 | return 1; |
Guido van Rossum | eb6b33a | 1993-05-25 09:38:27 +0000 | [diff] [blame] | 231 | if (class == NULL || !is_classobject(class)) |
| 232 | return 0; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 233 | cp = (classobject *)class; |
| 234 | n = gettuplesize(cp->cl_bases); |
| 235 | for (i = 0; i < n; i++) { |
| 236 | if (issubclass(gettupleitem(cp->cl_bases, i), base)) |
| 237 | return 1; |
| 238 | } |
| 239 | return 0; |
| 240 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 241 | |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 242 | |
| 243 | /* Instance objects */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 244 | |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 245 | static int |
| 246 | addaccess(class, inst) |
| 247 | classobject *class; |
| 248 | instanceobject *inst; |
| 249 | { |
| 250 | int i, n, pos, ret; |
| 251 | object *key, *value, *ac; |
| 252 | |
| 253 | n = gettuplesize(class->cl_bases); |
| 254 | for (i = 0; i < n; i++) { |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 255 | if (addaccess((classobject *)gettupleitem(class->cl_bases, i), inst) < 0) |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 256 | return -1; |
| 257 | } |
| 258 | |
| 259 | pos = 0; |
| 260 | while (mappinggetnext(class->cl_dict, &pos, &key, &value)) { |
| 261 | if (!is_accessobject(value)) |
| 262 | continue; |
Guido van Rossum | b3f7258 | 1993-05-21 19:56:10 +0000 | [diff] [blame] | 263 | if (hasaccessvalue(value)) |
| 264 | continue; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 265 | ac = dict2lookup(inst->in_dict, key); |
| 266 | if (ac != NULL && is_accessobject(ac)) { |
| 267 | err_setval(ConflictError, key); |
| 268 | return -1; |
| 269 | } |
| 270 | ac = cloneaccessobject(value); |
| 271 | if (ac == NULL) |
| 272 | return -1; |
| 273 | ret = dict2insert(inst->in_dict, key, ac); |
| 274 | DECREF(ac); |
| 275 | if (ret != 0) |
| 276 | return -1; |
| 277 | } |
| 278 | return 0; |
| 279 | } |
| 280 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 281 | object * |
Guido van Rossum | a83f270 | 1995-07-26 18:07:32 +0000 | [diff] [blame^] | 282 | newinstanceobject(class, arg, kw) |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 283 | object *class; |
| 284 | object *arg; |
Guido van Rossum | a83f270 | 1995-07-26 18:07:32 +0000 | [diff] [blame^] | 285 | object *kw; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 286 | { |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 287 | register instanceobject *inst; |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 288 | object *init; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 289 | if (!is_classobject(class)) { |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 290 | err_badcall(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 291 | return NULL; |
| 292 | } |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 293 | inst = NEWOBJ(instanceobject, &Instancetype); |
| 294 | if (inst == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 295 | return NULL; |
| 296 | INCREF(class); |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 297 | inst->in_class = (classobject *)class; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 298 | inst->in_dict = newdictobject(); |
| 299 | if (inst->in_dict == NULL || |
| 300 | addaccess((classobject *)class, inst) != 0) { |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 301 | DECREF(inst); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 302 | return NULL; |
| 303 | } |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 304 | init = instance_getattr1(inst, "__init__"); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 305 | if (init == NULL) { |
| 306 | err_clear(); |
Guido van Rossum | a83f270 | 1995-07-26 18:07:32 +0000 | [diff] [blame^] | 307 | if (arg != NULL && (!is_tupleobject(arg) || |
| 308 | gettuplesize(arg) != 0) || kw != NULL) { |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 309 | err_setstr(TypeError, |
Guido van Rossum | a83f270 | 1995-07-26 18:07:32 +0000 | [diff] [blame^] | 310 | "this constructor takes no arguments"); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 311 | DECREF(inst); |
| 312 | inst = NULL; |
| 313 | } |
| 314 | } |
| 315 | else { |
Guido van Rossum | a83f270 | 1995-07-26 18:07:32 +0000 | [diff] [blame^] | 316 | object *res = PyEval_CallObjectWithKeywords(init, arg, kw); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 317 | DECREF(init); |
| 318 | if (res == NULL) { |
| 319 | DECREF(inst); |
| 320 | inst = NULL; |
| 321 | } |
| 322 | else { |
| 323 | if (res != None) { |
| 324 | err_setstr(TypeError, |
| 325 | "__init__() should return None"); |
| 326 | DECREF(inst); |
| 327 | inst = NULL; |
| 328 | } |
| 329 | DECREF(res); |
| 330 | } |
| 331 | } |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 332 | return (object *)inst; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 333 | } |
| 334 | |
Guido van Rossum | 21ed88c | 1991-04-04 10:42:10 +0000 | [diff] [blame] | 335 | /* Instance methods */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 336 | |
| 337 | static void |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 338 | instance_dealloc(inst) |
| 339 | register instanceobject *inst; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 340 | { |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 341 | object *error_type, *error_value, *error_traceback; |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 342 | object *del; |
| 343 | /* Call the __del__ method if it exists. First temporarily |
| 344 | revive the object and save the current exception, if any. */ |
| 345 | INCREF(inst); |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 346 | err_fetch(&error_type, &error_value, &error_traceback); |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 347 | if ((del = instance_getattr1(inst, "__del__")) != NULL) { |
Guido van Rossum | 1311e3c | 1995-07-12 02:22:06 +0000 | [diff] [blame] | 348 | object *res = call_object(del, (object *)NULL); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 349 | DECREF(del); |
| 350 | XDECREF(res); |
| 351 | /* XXX If __del__ raised an exception, it is ignored! */ |
| 352 | } |
| 353 | /* Restore the saved exception and undo the temporary revival */ |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 354 | err_restore(error_type, error_value, error_traceback); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 355 | /* Can't use DECREF here, it would cause a recursive call */ |
| 356 | if (--inst->ob_refcnt > 0) |
| 357 | return; /* __del__ added a reference; don't delete now */ |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 358 | DECREF(inst->in_class); |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 359 | XDECREF(inst->in_dict); |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 360 | free((ANY *)inst); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 361 | } |
| 362 | |
Guido van Rossum | e773754 | 1994-09-05 07:31:41 +0000 | [diff] [blame] | 363 | static object * |
| 364 | instance_getattr1(inst, name) |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 365 | register instanceobject *inst; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 366 | register char *name; |
| 367 | { |
Guido van Rossum | 9430839 | 1991-10-20 20:11:48 +0000 | [diff] [blame] | 368 | register object *v; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 369 | classobject *class; |
Sjoerd Mullender | 3bb8a05 | 1993-10-22 12:04:32 +0000 | [diff] [blame] | 370 | if (name[0] == '_' && name[1] == '_') { |
| 371 | if (strcmp(name, "__dict__") == 0) { |
Guido van Rossum | 10393b1 | 1995-01-10 10:39:49 +0000 | [diff] [blame] | 372 | if (getrestricted()) { |
| 373 | err_setstr(RuntimeError, |
| 374 | "instance.__dict__ not accessible in restricted mode"); |
| 375 | return NULL; |
| 376 | } |
Sjoerd Mullender | 3bb8a05 | 1993-10-22 12:04:32 +0000 | [diff] [blame] | 377 | INCREF(inst->in_dict); |
| 378 | return inst->in_dict; |
| 379 | } |
| 380 | if (strcmp(name, "__class__") == 0) { |
| 381 | INCREF(inst->in_class); |
| 382 | return (object *)inst->in_class; |
| 383 | } |
Guido van Rossum | 9430839 | 1991-10-20 20:11:48 +0000 | [diff] [blame] | 384 | } |
Guido van Rossum | eb6b33a | 1993-05-25 09:38:27 +0000 | [diff] [blame] | 385 | class = NULL; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 386 | v = dictlookup(inst->in_dict, name); |
Guido van Rossum | b3f7258 | 1993-05-21 19:56:10 +0000 | [diff] [blame] | 387 | if (v == NULL) { |
| 388 | v = class_lookup(inst->in_class, name, &class); |
| 389 | if (v == NULL) { |
| 390 | err_setstr(AttributeError, name); |
| 391 | return NULL; |
| 392 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 393 | } |
Guido van Rossum | b3f7258 | 1993-05-21 19:56:10 +0000 | [diff] [blame] | 394 | if (is_accessobject(v)) { |
Guido van Rossum | eb6b33a | 1993-05-25 09:38:27 +0000 | [diff] [blame] | 395 | v = getaccessvalue(v, getowner()); |
Guido van Rossum | b3f7258 | 1993-05-21 19:56:10 +0000 | [diff] [blame] | 396 | if (v == NULL) |
| 397 | return NULL; |
| 398 | } |
| 399 | else |
| 400 | INCREF(v); |
Guido van Rossum | 21d335e | 1993-10-15 13:01:11 +0000 | [diff] [blame] | 401 | if (class != NULL) { |
| 402 | if (is_funcobject(v)) { |
| 403 | object *w = newinstancemethodobject(v, (object *)inst, |
| 404 | (object *)class); |
| 405 | DECREF(v); |
| 406 | v = w; |
| 407 | } |
| 408 | else if (is_instancemethodobject(v)) { |
| 409 | object *im_class = instancemethodgetclass(v); |
| 410 | /* Only if classes are compatible */ |
| 411 | if (issubclass((object *)class, im_class)) { |
| 412 | object *im_func = instancemethodgetfunc(v); |
| 413 | object *w = newinstancemethodobject(im_func, |
| 414 | (object *)inst, im_class); |
| 415 | DECREF(v); |
| 416 | v = w; |
| 417 | } |
| 418 | } |
Guido van Rossum | b3f7258 | 1993-05-21 19:56:10 +0000 | [diff] [blame] | 419 | } |
| 420 | return v; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 421 | } |
| 422 | |
Guido van Rossum | e773754 | 1994-09-05 07:31:41 +0000 | [diff] [blame] | 423 | static object * |
| 424 | instance_getattr(inst, name) |
| 425 | register instanceobject *inst; |
| 426 | register char *name; |
| 427 | { |
| 428 | register object *func, *res; |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 429 | res = instance_getattr1(inst, name); |
| 430 | if (res == NULL && (func = inst->in_class->cl_getattr) != NULL) { |
| 431 | object *args; |
Guido van Rossum | d7047b3 | 1995-01-02 19:07:15 +0000 | [diff] [blame] | 432 | err_clear(); |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 433 | args = mkvalue("(Os)", inst, name); |
| 434 | if (args == NULL) |
Guido van Rossum | e773754 | 1994-09-05 07:31:41 +0000 | [diff] [blame] | 435 | return NULL; |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 436 | res = call_object(func, args); |
| 437 | DECREF(args); |
Guido van Rossum | e773754 | 1994-09-05 07:31:41 +0000 | [diff] [blame] | 438 | } |
| 439 | return res; |
| 440 | } |
| 441 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 442 | static int |
Guido van Rossum | e773754 | 1994-09-05 07:31:41 +0000 | [diff] [blame] | 443 | instance_setattr1(inst, name, v) |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 444 | instanceobject *inst; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 445 | char *name; |
| 446 | object *v; |
| 447 | { |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 448 | object *ac; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 449 | ac = dictlookup(inst->in_dict, name); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 450 | if (ac != NULL && is_accessobject(ac)) |
Guido van Rossum | eb6b33a | 1993-05-25 09:38:27 +0000 | [diff] [blame] | 451 | return setaccessvalue(ac, getowner(), v); |
Guido van Rossum | 94472a0 | 1992-09-04 09:45:18 +0000 | [diff] [blame] | 452 | if (v == NULL) { |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 453 | int rv = dictremove(inst->in_dict, name); |
Guido van Rossum | 94472a0 | 1992-09-04 09:45:18 +0000 | [diff] [blame] | 454 | if (rv < 0) |
| 455 | err_setstr(AttributeError, |
| 456 | "delete non-existing instance attribute"); |
| 457 | return rv; |
| 458 | } |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 459 | else |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 460 | return dictinsert(inst->in_dict, name, v); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 461 | } |
| 462 | |
Guido van Rossum | e773754 | 1994-09-05 07:31:41 +0000 | [diff] [blame] | 463 | static int |
| 464 | instance_setattr(inst, name, v) |
| 465 | instanceobject *inst; |
| 466 | char *name; |
| 467 | object *v; |
| 468 | { |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 469 | object *func, *args, *res; |
| 470 | if (name[0] == '_' && name[1] == '_') { |
| 471 | int n = strlen(name); |
| 472 | if (name[n-1] == '_' && name[n-2] == '_') { |
| 473 | err_setstr(TypeError, "read-only special attribute"); |
Guido van Rossum | e773754 | 1994-09-05 07:31:41 +0000 | [diff] [blame] | 474 | return -1; |
| 475 | } |
Guido van Rossum | e773754 | 1994-09-05 07:31:41 +0000 | [diff] [blame] | 476 | } |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 477 | if (v == NULL) |
| 478 | func = inst->in_class->cl_delattr; |
| 479 | else |
| 480 | func = inst->in_class->cl_setattr; |
| 481 | if (func == NULL) |
| 482 | return instance_setattr1(inst, name, v); |
| 483 | if (v == NULL) |
| 484 | args = mkvalue("(Os)", inst, name); |
| 485 | else |
| 486 | args = mkvalue("(OsO)", inst, name, v); |
| 487 | if (args == NULL) |
| 488 | return -1; |
| 489 | res = call_object(func, args); |
| 490 | DECREF(args); |
| 491 | if (res == NULL) |
| 492 | return -1; |
| 493 | DECREF(res); |
Guido van Rossum | e773754 | 1994-09-05 07:31:41 +0000 | [diff] [blame] | 494 | return 0; |
| 495 | } |
| 496 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 497 | static object * |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 498 | instance_repr(inst) |
| 499 | instanceobject *inst; |
| 500 | { |
| 501 | object *func; |
| 502 | object *res; |
| 503 | |
| 504 | func = instance_getattr(inst, "__repr__"); |
| 505 | if (func == NULL) { |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 506 | char buf[140]; |
| 507 | object *classname = inst->in_class->cl_name; |
| 508 | char *cname; |
| 509 | if (classname != NULL && is_stringobject(classname)) |
| 510 | cname = getstringvalue(classname); |
| 511 | else |
| 512 | cname = "?"; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 513 | err_clear(); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 514 | sprintf(buf, "<%.100s instance at %lx>", cname, (long)inst); |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 515 | return newstringobject(buf); |
| 516 | } |
| 517 | res = call_object(func, (object *)NULL); |
| 518 | DECREF(func); |
| 519 | return res; |
| 520 | } |
| 521 | |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 522 | static object * |
| 523 | instance_compare1(inst, other) |
| 524 | object *inst, *other; |
| 525 | { |
| 526 | return instancebinop(inst, other, "__cmp__", "__rcmp__", |
| 527 | instance_compare1); |
| 528 | } |
| 529 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 530 | static int |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 531 | instance_compare(inst, other) |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 532 | object *inst, *other; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 533 | { |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 534 | object *result; |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 535 | long outcome; |
| 536 | result = instance_compare1(inst, other); |
| 537 | if (result == NULL || !is_intobject(result)) { |
Guido van Rossum | bb3c5f7 | 1994-11-10 22:31:02 +0000 | [diff] [blame] | 538 | error: |
Sjoerd Mullender | b9a6d12 | 1994-10-19 15:11:52 +0000 | [diff] [blame] | 539 | err_clear(); |
Guido van Rossum | bb3c5f7 | 1994-11-10 22:31:02 +0000 | [diff] [blame] | 540 | return (inst < other) ? -1 : 1; |
Sjoerd Mullender | b9a6d12 | 1994-10-19 15:11:52 +0000 | [diff] [blame] | 541 | } |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 542 | outcome = getintvalue(result); |
| 543 | DECREF(result); |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 544 | if (outcome < 0) |
| 545 | return -1; |
| 546 | else if (outcome > 0) |
| 547 | return 1; |
| 548 | return 0; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 549 | } |
| 550 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 551 | static long |
| 552 | instance_hash(inst) |
| 553 | instanceobject *inst; |
| 554 | { |
| 555 | object *func; |
| 556 | object *res; |
Guido van Rossum | 8a0c345 | 1993-04-08 12:56:19 +0000 | [diff] [blame] | 557 | long outcome; |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 558 | |
| 559 | func = instance_getattr(inst, "__hash__"); |
| 560 | if (func == NULL) { |
| 561 | /* If there is no __cmp__ method, we hash on the address. |
| 562 | If a __cmp__ method exists, there must be a __hash__. */ |
| 563 | err_clear(); |
| 564 | func = instance_getattr(inst, "__cmp__"); |
Guido van Rossum | 8a0c345 | 1993-04-08 12:56:19 +0000 | [diff] [blame] | 565 | if (func == NULL) { |
| 566 | err_clear(); |
| 567 | outcome = (long)inst; |
| 568 | if (outcome == -1) |
| 569 | outcome = -2; |
| 570 | return outcome; |
| 571 | } |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 572 | err_setstr(TypeError, "unhashable instance"); |
| 573 | return -1; |
| 574 | } |
| 575 | res = call_object(func, (object *)NULL); |
| 576 | DECREF(func); |
| 577 | if (res == NULL) |
| 578 | return -1; |
| 579 | if (is_intobject(res)) { |
| 580 | outcome = getintvalue(res); |
| 581 | if (outcome == -1) |
| 582 | outcome = -2; |
| 583 | } |
| 584 | else { |
| 585 | err_setstr(TypeError, "__hash__() should return an int"); |
| 586 | outcome = -1; |
| 587 | } |
| 588 | DECREF(res); |
| 589 | return outcome; |
| 590 | } |
| 591 | |
| 592 | static int |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 593 | instance_length(inst) |
| 594 | instanceobject *inst; |
| 595 | { |
| 596 | object *func; |
| 597 | object *res; |
| 598 | int outcome; |
| 599 | |
| 600 | func = instance_getattr(inst, "__len__"); |
| 601 | if (func == NULL) |
| 602 | return -1; |
| 603 | res = call_object(func, (object *)NULL); |
| 604 | DECREF(func); |
Guido van Rossum | d014ea6 | 1992-11-26 10:30:26 +0000 | [diff] [blame] | 605 | if (res == NULL) |
| 606 | return -1; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 607 | if (is_intobject(res)) { |
| 608 | outcome = getintvalue(res); |
| 609 | if (outcome < 0) |
| 610 | err_setstr(ValueError, "__len__() should return >= 0"); |
| 611 | } |
| 612 | else { |
| 613 | err_setstr(TypeError, "__len__() should return an int"); |
| 614 | outcome = -1; |
| 615 | } |
| 616 | DECREF(res); |
| 617 | return outcome; |
| 618 | } |
| 619 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 620 | static object * |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 621 | instance_subscript(inst, key) |
| 622 | instanceobject *inst; |
| 623 | object *key; |
| 624 | { |
| 625 | object *func; |
| 626 | object *arg; |
| 627 | object *res; |
| 628 | |
| 629 | func = instance_getattr(inst, "__getitem__"); |
| 630 | if (func == NULL) |
| 631 | return NULL; |
| 632 | arg = mkvalue("(O)", key); |
| 633 | if (arg == NULL) { |
| 634 | DECREF(func); |
| 635 | return NULL; |
| 636 | } |
| 637 | res = call_object(func, arg); |
| 638 | DECREF(func); |
| 639 | DECREF(arg); |
| 640 | return res; |
| 641 | } |
| 642 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 643 | static int |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 644 | instance_ass_subscript(inst, key, value) |
| 645 | instanceobject*inst; |
| 646 | object *key; |
| 647 | object *value; |
| 648 | { |
| 649 | object *func; |
| 650 | object *arg; |
| 651 | object *res; |
| 652 | |
| 653 | if (value == NULL) |
| 654 | func = instance_getattr(inst, "__delitem__"); |
| 655 | else |
| 656 | func = instance_getattr(inst, "__setitem__"); |
| 657 | if (func == NULL) |
| 658 | return -1; |
| 659 | if (value == NULL) |
| 660 | arg = mkvalue("(O)", key); |
| 661 | else |
| 662 | arg = mkvalue("(OO)", key, value); |
| 663 | if (arg == NULL) { |
| 664 | DECREF(func); |
Guido van Rossum | 6d946f9 | 1992-08-14 13:49:30 +0000 | [diff] [blame] | 665 | return -1; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 666 | } |
| 667 | res = call_object(func, arg); |
| 668 | DECREF(func); |
| 669 | DECREF(arg); |
| 670 | if (res == NULL) |
| 671 | return -1; |
| 672 | DECREF(res); |
| 673 | return 0; |
| 674 | } |
| 675 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 676 | static mapping_methods instance_as_mapping = { |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 677 | (inquiry)instance_length, /*mp_length*/ |
| 678 | (binaryfunc)instance_subscript, /*mp_subscript*/ |
| 679 | (objobjargproc)instance_ass_subscript, /*mp_ass_subscript*/ |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 680 | }; |
| 681 | |
| 682 | static object * |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 683 | instance_item(inst, i) |
| 684 | instanceobject *inst; |
| 685 | int i; |
| 686 | { |
| 687 | object *func, *arg, *res; |
| 688 | |
| 689 | func = instance_getattr(inst, "__getitem__"); |
| 690 | if (func == NULL) |
| 691 | return NULL; |
Guido van Rossum | 1311e3c | 1995-07-12 02:22:06 +0000 | [diff] [blame] | 692 | arg = mkvalue("(i)", i); |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 693 | if (arg == NULL) { |
| 694 | DECREF(func); |
| 695 | return NULL; |
| 696 | } |
| 697 | res = call_object(func, arg); |
| 698 | DECREF(func); |
| 699 | DECREF(arg); |
| 700 | return res; |
| 701 | } |
| 702 | |
| 703 | static object * |
| 704 | instance_slice(inst, i, j) |
| 705 | instanceobject *inst; |
| 706 | int i, j; |
| 707 | { |
| 708 | object *func, *arg, *res; |
| 709 | |
| 710 | func = instance_getattr(inst, "__getslice__"); |
| 711 | if (func == NULL) |
| 712 | return NULL; |
| 713 | arg = mkvalue("(ii)", i, j); |
| 714 | if (arg == NULL) { |
| 715 | DECREF(func); |
| 716 | return NULL; |
| 717 | } |
| 718 | res = call_object(func, arg); |
| 719 | DECREF(func); |
| 720 | DECREF(arg); |
| 721 | return res; |
| 722 | } |
| 723 | |
| 724 | static int |
| 725 | instance_ass_item(inst, i, item) |
| 726 | instanceobject *inst; |
| 727 | int i; |
| 728 | object *item; |
| 729 | { |
| 730 | object *func, *arg, *res; |
| 731 | |
| 732 | if (item == NULL) |
| 733 | func = instance_getattr(inst, "__delitem__"); |
| 734 | else |
| 735 | func = instance_getattr(inst, "__setitem__"); |
| 736 | if (func == NULL) |
Guido van Rossum | 6d946f9 | 1992-08-14 13:49:30 +0000 | [diff] [blame] | 737 | return -1; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 738 | if (item == NULL) |
| 739 | arg = mkvalue("i", i); |
| 740 | else |
| 741 | arg = mkvalue("(iO)", i, item); |
| 742 | if (arg == NULL) { |
| 743 | DECREF(func); |
Guido van Rossum | 6d946f9 | 1992-08-14 13:49:30 +0000 | [diff] [blame] | 744 | return -1; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 745 | } |
| 746 | res = call_object(func, arg); |
| 747 | DECREF(func); |
| 748 | DECREF(arg); |
| 749 | if (res == NULL) |
| 750 | return -1; |
| 751 | DECREF(res); |
| 752 | return 0; |
| 753 | } |
| 754 | |
| 755 | static int |
| 756 | instance_ass_slice(inst, i, j, value) |
| 757 | instanceobject *inst; |
| 758 | int i, j; |
| 759 | object *value; |
| 760 | { |
| 761 | object *func, *arg, *res; |
| 762 | |
| 763 | if (value == NULL) |
| 764 | func = instance_getattr(inst, "__delslice__"); |
| 765 | else |
| 766 | func = instance_getattr(inst, "__setslice__"); |
| 767 | if (func == NULL) |
Guido van Rossum | 6d946f9 | 1992-08-14 13:49:30 +0000 | [diff] [blame] | 768 | return -1; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 769 | if (value == NULL) |
| 770 | arg = mkvalue("(ii)", i, j); |
| 771 | else |
| 772 | arg = mkvalue("(iiO)", i, j, value); |
| 773 | if (arg == NULL) { |
| 774 | DECREF(func); |
Guido van Rossum | 6d946f9 | 1992-08-14 13:49:30 +0000 | [diff] [blame] | 775 | return -1; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 776 | } |
| 777 | res = call_object(func, arg); |
| 778 | DECREF(func); |
| 779 | DECREF(arg); |
| 780 | if (res == NULL) |
| 781 | return -1; |
| 782 | DECREF(res); |
| 783 | return 0; |
| 784 | } |
| 785 | |
| 786 | static sequence_methods instance_as_sequence = { |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 787 | (inquiry)instance_length, /*sq_length*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 788 | 0, /*sq_concat*/ |
| 789 | 0, /*sq_repeat*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 790 | (intargfunc)instance_item, /*sq_item*/ |
| 791 | (intintargfunc)instance_slice, /*sq_slice*/ |
| 792 | (intobjargproc)instance_ass_item, /*sq_ass_item*/ |
| 793 | (intintobjargproc)instance_ass_slice, /*sq_ass_slice*/ |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 794 | }; |
| 795 | |
| 796 | static object * |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 797 | generic_unary_op(self, methodname) |
| 798 | instanceobject *self; |
| 799 | char *methodname; |
| 800 | { |
| 801 | object *func, *res; |
| 802 | |
| 803 | if ((func = instance_getattr(self, methodname)) == NULL) |
| 804 | return NULL; |
| 805 | res = call_object(func, (object *)NULL); |
| 806 | DECREF(func); |
| 807 | return res; |
| 808 | } |
| 809 | |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 810 | |
| 811 | /* Forward */ |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 812 | static int halfbinop PROTO((object *, object *, char *, object **, |
| 813 | object * (*) PROTO((object *, object *)), int )); |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 814 | |
| 815 | |
| 816 | /* Implement a binary operator involving at least one class instance. */ |
| 817 | |
| 818 | object * |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 819 | instancebinop(v, w, opname, ropname, thisfunc) |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 820 | object *v; |
| 821 | object *w; |
| 822 | char *opname; |
| 823 | char *ropname; |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 824 | object * (*thisfunc) PROTO((object *, object *)); |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 825 | { |
| 826 | char buf[256]; |
| 827 | object *result = NULL; |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 828 | if (halfbinop(v, w, opname, &result, thisfunc, 0) <= 0) |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 829 | return result; |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 830 | if (halfbinop(w, v, ropname, &result, thisfunc, 1) <= 0) |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 831 | return result; |
| 832 | sprintf(buf, "%s nor %s defined for these operands", opname, ropname); |
| 833 | err_setstr(TypeError, buf); |
| 834 | return NULL; |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 835 | } |
| 836 | |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 837 | |
| 838 | /* Try one half of a binary operator involving a class instance. |
| 839 | Return value: |
| 840 | -1 if an exception is to be reported right away |
| 841 | 0 if we have a valid result |
| 842 | 1 if we could try another operation |
| 843 | */ |
| 844 | |
| 845 | static int |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 846 | halfbinop(v, w, opname, r_result, thisfunc, swapped) |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 847 | object *v; |
| 848 | object *w; |
| 849 | char *opname; |
| 850 | object **r_result; |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 851 | object * (*thisfunc) PROTO((object *, object *)); |
| 852 | int swapped; |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 853 | { |
| 854 | object *func; |
| 855 | object *args; |
| 856 | object *coerce; |
| 857 | object *coerced = NULL; |
| 858 | object *v1; |
| 859 | |
| 860 | if (!is_instanceobject(v)) |
| 861 | return 1; |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 862 | coerce = getattr(v, "__coerce__"); |
| 863 | if (coerce == NULL) { |
| 864 | err_clear(); |
| 865 | } |
| 866 | else { |
| 867 | args = mkvalue("(O)", w); |
| 868 | if (args == NULL) { |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 869 | return -1; |
| 870 | } |
| 871 | coerced = call_object(coerce, args); |
| 872 | DECREF(args); |
| 873 | DECREF(coerce); |
| 874 | if (coerced == NULL) { |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 875 | return -1; |
| 876 | } |
| 877 | if (coerced == None) { |
| 878 | DECREF(coerced); |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 879 | return 1; |
| 880 | } |
| 881 | if (!is_tupleobject(coerced) || gettuplesize(coerced) != 2) { |
| 882 | DECREF(coerced); |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 883 | err_setstr(TypeError, |
| 884 | "coercion should return None or 2-tuple"); |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 885 | return -1; |
| 886 | } |
| 887 | v1 = gettupleitem(coerced, 0); |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 888 | w = gettupleitem(coerced, 1); |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 889 | if (v1 != v) { |
| 890 | v = v1; |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 891 | if (!is_instanceobject(v) && !is_instanceobject(w)) { |
| 892 | if (swapped) |
| 893 | *r_result = (*thisfunc)(w, v); |
| 894 | else |
| 895 | *r_result = (*thisfunc)(v, w); |
| 896 | DECREF(coerced); |
| 897 | return *r_result == NULL ? -1 : 0; |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 898 | } |
| 899 | } |
| 900 | w = gettupleitem(coerced, 1); |
| 901 | } |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 902 | func = getattr(v, opname); |
| 903 | if (func == NULL) { |
| 904 | XDECREF(coerced); |
| 905 | if (err_occurred() != AttributeError) |
| 906 | return -1; |
| 907 | err_clear(); |
| 908 | return 1; |
| 909 | } |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 910 | args = mkvalue("(O)", w); |
| 911 | if (args == NULL) { |
| 912 | DECREF(func); |
| 913 | XDECREF(coerced); |
| 914 | return -1; |
| 915 | } |
| 916 | *r_result = call_object(func, args); |
| 917 | DECREF(args); |
| 918 | DECREF(func); |
| 919 | XDECREF(coerced); |
| 920 | return *r_result == NULL ? -1 : 0; |
| 921 | } |
| 922 | |
Guido van Rossum | 879c581 | 1995-01-10 15:24:06 +0000 | [diff] [blame] | 923 | static int |
| 924 | instance_coerce(pv, pw) |
| 925 | object **pv; |
| 926 | object **pw; |
| 927 | { |
| 928 | object *v = *pv; |
| 929 | object *w = *pw; |
| 930 | object *coerce; |
| 931 | object *args; |
| 932 | object *coerced; |
| 933 | |
| 934 | coerce = getattr(v, "__coerce__"); |
| 935 | if (coerce == NULL) { |
| 936 | /* No __coerce__ method: always OK */ |
| 937 | err_clear(); |
| 938 | INCREF(v); |
| 939 | INCREF(w); |
| 940 | return 0; |
| 941 | } |
| 942 | /* Has __coerce__ method: call it */ |
| 943 | args = mkvalue("(O)", w); |
| 944 | if (args == NULL) { |
| 945 | return -1; |
| 946 | } |
| 947 | coerced = call_object(coerce, args); |
| 948 | DECREF(args); |
| 949 | DECREF(coerce); |
| 950 | if (coerced == NULL) { |
| 951 | /* __coerce__ call raised an exception */ |
| 952 | return -1; |
| 953 | } |
| 954 | if (coerced == None) { |
| 955 | /* __coerce__ says "I can't do it" */ |
| 956 | DECREF(coerced); |
| 957 | return 1; |
| 958 | } |
| 959 | if (!is_tupleobject(coerced) || gettuplesize(coerced) != 2) { |
| 960 | /* __coerce__ return value is malformed */ |
| 961 | DECREF(coerced); |
| 962 | err_setstr(TypeError, |
| 963 | "coercion should return None or 2-tuple"); |
| 964 | return -1; |
| 965 | } |
| 966 | /* __coerce__ returned two new values */ |
| 967 | *pv = gettupleitem(coerced, 0); |
| 968 | *pw = gettupleitem(coerced, 1); |
| 969 | INCREF(*pv); |
| 970 | INCREF(*pw); |
| 971 | DECREF(coerced); |
| 972 | return 0; |
| 973 | } |
| 974 | |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 975 | |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 976 | #define UNARY(funcname, methodname) \ |
| 977 | static object *funcname(self) instanceobject *self; { \ |
| 978 | return generic_unary_op(self, methodname); \ |
| 979 | } |
| 980 | |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 981 | UNARY(instance_neg, "__neg__") |
| 982 | UNARY(instance_pos, "__pos__") |
| 983 | UNARY(instance_abs, "__abs__") |
| 984 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 985 | static int |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 986 | instance_nonzero(self) |
| 987 | instanceobject *self; |
| 988 | { |
| 989 | object *func, *res; |
| 990 | long outcome; |
| 991 | |
Guido van Rossum | 9e51f9b | 1993-02-12 16:29:05 +0000 | [diff] [blame] | 992 | if ((func = instance_getattr(self, "__nonzero__")) == NULL) { |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 993 | err_clear(); |
Guido van Rossum | 9e51f9b | 1993-02-12 16:29:05 +0000 | [diff] [blame] | 994 | if ((func = instance_getattr(self, "__len__")) == NULL) { |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 995 | err_clear(); |
| 996 | /* Fall back to the default behavior: |
| 997 | all instances are nonzero */ |
| 998 | return 1; |
| 999 | } |
| 1000 | } |
| 1001 | res = call_object(func, (object *)NULL); |
| 1002 | DECREF(func); |
| 1003 | if (res == NULL) |
| 1004 | return -1; |
| 1005 | if (!is_intobject(res)) { |
| 1006 | DECREF(res); |
| 1007 | err_setstr(TypeError, "__nonzero__ should return an int"); |
| 1008 | return -1; |
| 1009 | } |
| 1010 | outcome = getintvalue(res); |
| 1011 | DECREF(res); |
| 1012 | if (outcome < 0) { |
| 1013 | err_setstr(ValueError, "__nonzero__ should return >= 0"); |
| 1014 | return -1; |
| 1015 | } |
| 1016 | return outcome > 0; |
| 1017 | } |
| 1018 | |
| 1019 | UNARY(instance_invert, "__invert__") |
Guido van Rossum | 1899c2e | 1992-09-12 11:09:23 +0000 | [diff] [blame] | 1020 | UNARY(instance_int, "__int__") |
| 1021 | UNARY(instance_long, "__long__") |
| 1022 | UNARY(instance_float, "__float__") |
| 1023 | UNARY(instance_oct, "__oct__") |
| 1024 | UNARY(instance_hex, "__hex__") |
| 1025 | |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 1026 | /* This version is for ternary calls only (z != None) */ |
| 1027 | static object * |
| 1028 | instance_pow(v, w, z) |
| 1029 | object *v; |
| 1030 | object *w; |
| 1031 | object *z; |
| 1032 | { |
| 1033 | /* XXX Doesn't do coercions... */ |
| 1034 | object *func; |
| 1035 | object *args; |
| 1036 | object *result; |
| 1037 | func = getattr(v, "__pow__"); |
| 1038 | if (func == NULL) |
| 1039 | return NULL; |
| 1040 | args = mkvalue("(OO)", w, z); |
| 1041 | if (args == NULL) { |
| 1042 | DECREF(func); |
| 1043 | return NULL; |
| 1044 | } |
| 1045 | result = call_object(func, args); |
| 1046 | DECREF(func); |
| 1047 | DECREF(args); |
| 1048 | return result; |
| 1049 | } |
| 1050 | |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 1051 | static number_methods instance_as_number = { |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 1052 | 0, /*nb_add*/ |
| 1053 | 0, /*nb_subtract*/ |
| 1054 | 0, /*nb_multiply*/ |
| 1055 | 0, /*nb_divide*/ |
| 1056 | 0, /*nb_remainder*/ |
| 1057 | 0, /*nb_divmod*/ |
Guido van Rossum | 52ca98a | 1994-09-05 07:32:29 +0000 | [diff] [blame] | 1058 | (ternaryfunc)instance_pow, /*nb_power*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1059 | (unaryfunc)instance_neg, /*nb_negative*/ |
| 1060 | (unaryfunc)instance_pos, /*nb_positive*/ |
| 1061 | (unaryfunc)instance_abs, /*nb_absolute*/ |
| 1062 | (inquiry)instance_nonzero, /*nb_nonzero*/ |
| 1063 | (unaryfunc)instance_invert, /*nb_invert*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 1064 | 0, /*nb_lshift*/ |
| 1065 | 0, /*nb_rshift*/ |
| 1066 | 0, /*nb_and*/ |
| 1067 | 0, /*nb_xor*/ |
| 1068 | 0, /*nb_or*/ |
Guido van Rossum | 879c581 | 1995-01-10 15:24:06 +0000 | [diff] [blame] | 1069 | (coercion)instance_coerce, /*nb_coerce*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1070 | (unaryfunc)instance_int, /*nb_int*/ |
| 1071 | (unaryfunc)instance_long, /*nb_long*/ |
| 1072 | (unaryfunc)instance_float, /*nb_float*/ |
| 1073 | (unaryfunc)instance_oct, /*nb_oct*/ |
| 1074 | (unaryfunc)instance_hex, /*nb_hex*/ |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 1075 | }; |
| 1076 | |
Guido van Rossum | 21ed88c | 1991-04-04 10:42:10 +0000 | [diff] [blame] | 1077 | typeobject Instancetype = { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1078 | OB_HEAD_INIT(&Typetype) |
| 1079 | 0, |
Guido van Rossum | 21ed88c | 1991-04-04 10:42:10 +0000 | [diff] [blame] | 1080 | "instance", |
| 1081 | sizeof(instanceobject), |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1082 | 0, |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1083 | (destructor)instance_dealloc, /*tp_dealloc*/ |
Guido van Rossum | 7066dd7 | 1992-09-17 17:54:56 +0000 | [diff] [blame] | 1084 | 0, /*tp_print*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1085 | (getattrfunc)instance_getattr, /*tp_getattr*/ |
| 1086 | (setattrfunc)instance_setattr, /*tp_setattr*/ |
Guido van Rossum | 03093a2 | 1994-09-28 15:51:32 +0000 | [diff] [blame] | 1087 | instance_compare, /*tp_compare*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1088 | (reprfunc)instance_repr, /*tp_repr*/ |
Guido van Rossum | 04691fc | 1992-08-12 15:35:34 +0000 | [diff] [blame] | 1089 | &instance_as_number, /*tp_as_number*/ |
| 1090 | &instance_as_sequence, /*tp_as_sequence*/ |
| 1091 | &instance_as_mapping, /*tp_as_mapping*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1092 | (hashfunc)instance_hash, /*tp_hash*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1093 | }; |
| 1094 | |
| 1095 | |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1096 | /* Instance method objects are used for two purposes: |
| 1097 | (a) as bound instance methods (returned by instancename.methodname) |
| 1098 | (b) as unbound methods (returned by ClassName.methodname) |
| 1099 | In case (b), im_self is NULL |
| 1100 | */ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1101 | |
| 1102 | typedef struct { |
| 1103 | OB_HEAD |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1104 | object *im_func; /* The function implementing the method */ |
| 1105 | object *im_self; /* The instance it is bound to, or NULL */ |
| 1106 | object *im_class; /* The class that defined the method */ |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 1107 | object *im_doc; /* The documentation string */ |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1108 | } instancemethodobject; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1109 | |
| 1110 | object * |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1111 | newinstancemethodobject(func, self, class) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1112 | object *func; |
| 1113 | object *self; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1114 | object *class; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1115 | { |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1116 | register instancemethodobject *im; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1117 | if (!is_funcobject(func)) { |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 1118 | err_badcall(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1119 | return NULL; |
| 1120 | } |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1121 | im = NEWOBJ(instancemethodobject, &Instancemethodtype); |
| 1122 | if (im == NULL) |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1123 | return NULL; |
| 1124 | INCREF(func); |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1125 | im->im_func = func; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1126 | XINCREF(self); |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1127 | im->im_self = self; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1128 | INCREF(class); |
| 1129 | im->im_class = class; |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 1130 | XINCREF(((funcobject *)func)->func_doc); |
| 1131 | im->im_doc = ((funcobject *)func)->func_doc; |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1132 | return (object *)im; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1133 | } |
| 1134 | |
| 1135 | object * |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1136 | instancemethodgetfunc(im) |
| 1137 | register object *im; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1138 | { |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1139 | if (!is_instancemethodobject(im)) { |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 1140 | err_badcall(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1141 | return NULL; |
| 1142 | } |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1143 | return ((instancemethodobject *)im)->im_func; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1144 | } |
| 1145 | |
| 1146 | object * |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1147 | instancemethodgetself(im) |
| 1148 | register object *im; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1149 | { |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1150 | if (!is_instancemethodobject(im)) { |
Guido van Rossum | 2a9096b | 1990-10-21 22:15:08 +0000 | [diff] [blame] | 1151 | err_badcall(); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1152 | return NULL; |
| 1153 | } |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1154 | return ((instancemethodobject *)im)->im_self; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1155 | } |
| 1156 | |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1157 | object * |
| 1158 | instancemethodgetclass(im) |
| 1159 | register object *im; |
| 1160 | { |
| 1161 | if (!is_instancemethodobject(im)) { |
| 1162 | err_badcall(); |
| 1163 | return NULL; |
| 1164 | } |
| 1165 | return ((instancemethodobject *)im)->im_class; |
| 1166 | } |
| 1167 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1168 | /* Class method methods */ |
| 1169 | |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1170 | #define OFF(x) offsetof(instancemethodobject, x) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1171 | |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1172 | static struct memberlist instancemethod_memberlist[] = { |
| 1173 | {"im_func", T_OBJECT, OFF(im_func)}, |
| 1174 | {"im_self", T_OBJECT, OFF(im_self)}, |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1175 | {"im_class", T_OBJECT, OFF(im_class)}, |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 1176 | {"im_doc", T_OBJECT, OFF(im_doc)}, |
| 1177 | {"__doc__", T_OBJECT, OFF(im_doc)}, |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1178 | {NULL} /* Sentinel */ |
| 1179 | }; |
| 1180 | |
| 1181 | static object * |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1182 | instancemethod_getattr(im, name) |
| 1183 | register instancemethodobject *im; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1184 | char *name; |
| 1185 | { |
Guido van Rossum | 10393b1 | 1995-01-10 10:39:49 +0000 | [diff] [blame] | 1186 | if (name[0] != '_' && getrestricted()) { |
| 1187 | err_setstr(RuntimeError, |
| 1188 | "instance-method attributes not accessible in restricted mode"); |
| 1189 | return NULL; |
| 1190 | } |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1191 | return getmember((char *)im, instancemethod_memberlist, name); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1192 | } |
| 1193 | |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1194 | static void |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1195 | instancemethod_dealloc(im) |
| 1196 | register instancemethodobject *im; |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1197 | { |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1198 | DECREF(im->im_func); |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1199 | XDECREF(im->im_self); |
| 1200 | DECREF(im->im_class); |
Guido van Rossum | e7d444f | 1995-01-07 12:35:18 +0000 | [diff] [blame] | 1201 | XDECREF(im->im_doc); |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1202 | free((ANY *)im); |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1203 | } |
| 1204 | |
Guido van Rossum | ebc8c51 | 1992-09-03 20:39:51 +0000 | [diff] [blame] | 1205 | static int |
| 1206 | instancemethod_compare(a, b) |
| 1207 | instancemethodobject *a, *b; |
| 1208 | { |
Guido van Rossum | e9df727 | 1995-04-06 14:46:51 +0000 | [diff] [blame] | 1209 | if (a->im_self != b->im_self) |
| 1210 | return (a->im_self < b->im_self) ? -1 : 1; |
| 1211 | return cmpobject(a->im_func, b->im_func); |
Guido van Rossum | ebc8c51 | 1992-09-03 20:39:51 +0000 | [diff] [blame] | 1212 | } |
| 1213 | |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 1214 | static object * |
| 1215 | instancemethod_repr(a) |
| 1216 | instancemethodobject *a; |
| 1217 | { |
| 1218 | char buf[240]; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1219 | instanceobject *self = (instanceobject *)(a->im_self); |
| 1220 | funcobject *func = (funcobject *)(a->im_func); |
| 1221 | classobject *class = (classobject *)(a->im_class); |
| 1222 | object *fclassname, *iclassname, *funcname; |
| 1223 | char *fcname, *icname, *fname; |
| 1224 | fclassname = class->cl_name; |
| 1225 | funcname = func->func_name; |
| 1226 | if (fclassname != NULL && is_stringobject(fclassname)) |
| 1227 | fcname = getstringvalue(fclassname); |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 1228 | else |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1229 | fcname = "?"; |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 1230 | if (funcname != NULL && is_stringobject(funcname)) |
| 1231 | fname = getstringvalue(funcname); |
| 1232 | else |
| 1233 | fname = "?"; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1234 | if (self == NULL) |
| 1235 | sprintf(buf, "<unbound method %.100s.%.100s>", fcname, fname); |
| 1236 | else { |
| 1237 | iclassname = self->in_class->cl_name; |
| 1238 | if (iclassname != NULL && is_stringobject(iclassname)) |
| 1239 | icname = getstringvalue(iclassname); |
| 1240 | else |
| 1241 | icname = "?"; |
| 1242 | sprintf(buf, "<method %.60s.%.60s of %.60s instance at %lx>", |
| 1243 | fcname, fname, icname, (long)self); |
| 1244 | } |
Guido van Rossum | 2583165 | 1993-05-19 14:50:45 +0000 | [diff] [blame] | 1245 | return newstringobject(buf); |
| 1246 | } |
| 1247 | |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 1248 | static long |
| 1249 | instancemethod_hash(a) |
| 1250 | instancemethodobject *a; |
| 1251 | { |
| 1252 | long x, y; |
Guido van Rossum | 81daa32 | 1993-05-20 14:24:46 +0000 | [diff] [blame] | 1253 | if (a->im_self == NULL) |
| 1254 | x = hashobject(None); |
| 1255 | else |
| 1256 | x = hashobject(a->im_self); |
Guido van Rossum | 9bfef44 | 1993-03-29 10:43:31 +0000 | [diff] [blame] | 1257 | if (x == -1) |
| 1258 | return -1; |
| 1259 | y = hashobject(a->im_func); |
| 1260 | if (y == -1) |
| 1261 | return -1; |
| 1262 | return x ^ y; |
| 1263 | } |
| 1264 | |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1265 | typeobject Instancemethodtype = { |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1266 | OB_HEAD_INIT(&Typetype) |
| 1267 | 0, |
Guido van Rossum | 569fce7 | 1991-04-16 08:38:43 +0000 | [diff] [blame] | 1268 | "instance method", |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1269 | sizeof(instancemethodobject), |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1270 | 0, |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1271 | (destructor)instancemethod_dealloc, /*tp_dealloc*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1272 | 0, /*tp_print*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1273 | (getattrfunc)instancemethod_getattr, /*tp_getattr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1274 | 0, /*tp_setattr*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1275 | (cmpfunc)instancemethod_compare, /*tp_compare*/ |
| 1276 | (reprfunc)instancemethod_repr, /*tp_repr*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1277 | 0, /*tp_as_number*/ |
| 1278 | 0, /*tp_as_sequence*/ |
| 1279 | 0, /*tp_as_mapping*/ |
Guido van Rossum | b6775db | 1994-08-01 11:34:53 +0000 | [diff] [blame] | 1280 | (hashfunc)instancemethod_hash, /*tp_hash*/ |
Guido van Rossum | 85a5fbb | 1990-10-14 12:07:46 +0000 | [diff] [blame] | 1281 | }; |