Guido van Rossum | f70e43a | 1991-02-19 12:39:46 +0000 | [diff] [blame] | 1 | /*********************************************************** |
| 2 | Copyright 1991 by Stichting Mathematisch Centrum, Amsterdam, The |
| 3 | Netherlands. |
| 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 | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 25 | /* Execute compiled code */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 26 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 27 | #include "allobjects.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 28 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 29 | #include "import.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 30 | #include "sysmodule.h" |
| 31 | #include "compile.h" |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 32 | #include "frameobject.h" |
| 33 | #include "ceval.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 34 | #include "opcode.h" |
Guido van Rossum | 86cd6e6 | 1991-01-21 15:12:35 +0000 | [diff] [blame] | 35 | #include "bltinmodule.h" |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 36 | #include "traceback.h" |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 37 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 38 | #ifndef NDEBUG |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 39 | /* For debugging the interpreter: */ |
| 40 | #define LLTRACE 1 /* Low-level trace feature */ |
| 41 | #define CHECKEXC 1 /* Double-check exception checking */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 42 | #endif |
| 43 | |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 44 | /* Forward declarations */ |
| 45 | /* XXX Need prototypes */ |
| 46 | |
| 47 | void flushline(); |
| 48 | static object *add(); |
| 49 | static object *sub(); |
| 50 | static object *mul(); |
| 51 | static object *divide(); |
| 52 | static object *rem(); |
| 53 | static object *neg(); |
| 54 | static object *pos(); |
| 55 | static object *not(); |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 56 | static object *invert(); |
| 57 | static object *lshift(); |
| 58 | static object *rshift(); |
| 59 | static object *and(); |
| 60 | static object *xor(); |
| 61 | static object *or(); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 62 | static object *call_builtin(); |
| 63 | static object *call_function(); |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 64 | object *call_object(); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 65 | static object *apply_subscript(); |
| 66 | static object *loop_subscript(); |
| 67 | static object *apply_slice(); |
| 68 | static object *cmp_outcome(); |
| 69 | static object *build_class(); |
| 70 | static int testbool(); |
| 71 | static int assign_subscript PROTO((object *, object *, object *)); |
| 72 | static int assign_slice PROTO((object *, object *, object *, object *)); |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 73 | static int import_from PROTO((object *, object *, object *)); |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 74 | static object *call_trace PROTO((object *, frameobject *, char *, object *)); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 75 | |
| 76 | |
| 77 | static frameobject *current_frame; |
| 78 | |
| 79 | |
| 80 | /* Status code for main loop (reason for stack unwind) */ |
| 81 | |
| 82 | enum why_code { |
| 83 | WHY_NOT, /* No error */ |
| 84 | WHY_EXCEPTION, /* Exception occurred */ |
| 85 | WHY_RERAISE, /* Exception re-raised by 'finally' */ |
| 86 | WHY_RETURN, /* 'return' statement */ |
| 87 | WHY_BREAK /* 'break' statement */ |
| 88 | }; |
| 89 | |
| 90 | |
| 91 | /* Interpreter main loop */ |
| 92 | |
| 93 | object * |
| 94 | eval_code(co, globals, locals, arg) |
| 95 | codeobject *co; |
| 96 | object *globals; |
| 97 | object *locals; |
| 98 | object *arg; |
| 99 | { |
| 100 | register unsigned char *next_instr; |
| 101 | register int opcode; /* Current opcode */ |
| 102 | register int oparg; /* Current opcode argument, if any */ |
| 103 | register object **stack_pointer; |
| 104 | register enum why_code why; /* Reason for block stack unwind */ |
| 105 | register int err; /* Error status -- nonzero if error */ |
| 106 | register object *x; /* Result object -- NULL if error */ |
| 107 | register object *v; /* Temporary objects popped off stack */ |
| 108 | register object *w; |
| 109 | register object *u; |
| 110 | register object *t; |
| 111 | register frameobject *f; /* Current frame */ |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 112 | object *trace; /* Trace function or NULL */ |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 113 | object *retval; /* Return value iff why == WHY_RETURN */ |
| 114 | char *name; /* Name used by some instructions */ |
| 115 | FILE *fp; /* Used by print operations */ |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 116 | #ifdef LLTRACE |
| 117 | int lltrace = dictlookup(globals, "__lltrace__") != NULL; |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 118 | #endif |
| 119 | |
| 120 | /* Code access macros */ |
| 121 | |
| 122 | #define GETCONST(i) Getconst(f, i) |
| 123 | #define GETNAME(i) Getname(f, i) |
| 124 | #define GETNAMEV(i) Getnamev(f, i) |
| 125 | #define FIRST_INSTR() (GETUSTRINGVALUE(f->f_code->co_code)) |
| 126 | #define INSTR_OFFSET() (next_instr - FIRST_INSTR()) |
| 127 | #define NEXTOP() (*next_instr++) |
| 128 | #define NEXTARG() (next_instr += 2, (next_instr[-1]<<8) + next_instr[-2]) |
| 129 | #define JUMPTO(x) (next_instr = FIRST_INSTR() + (x)) |
| 130 | #define JUMPBY(x) (next_instr += (x)) |
| 131 | |
| 132 | /* Stack manipulation macros */ |
| 133 | |
| 134 | #define STACK_LEVEL() (stack_pointer - f->f_valuestack) |
| 135 | #define EMPTY() (STACK_LEVEL() == 0) |
| 136 | #define TOP() (stack_pointer[-1]) |
| 137 | #define BASIC_PUSH(v) (*stack_pointer++ = (v)) |
| 138 | #define BASIC_POP() (*--stack_pointer) |
| 139 | |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 140 | #ifdef LLTRACE |
| 141 | #define PUSH(v) (BASIC_PUSH(v), lltrace && prtrace(TOP(), "push")) |
| 142 | #define POP() (lltrace && prtrace(TOP(), "pop"), BASIC_POP()) |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 143 | #else |
| 144 | #define PUSH(v) BASIC_PUSH(v) |
| 145 | #define POP() BASIC_POP() |
| 146 | #endif |
| 147 | |
| 148 | f = newframeobject( |
| 149 | current_frame, /*back*/ |
| 150 | co, /*code*/ |
| 151 | globals, /*globals*/ |
| 152 | locals, /*locals*/ |
| 153 | 50, /*nvalues*/ |
| 154 | 20); /*nblocks*/ |
| 155 | if (f == NULL) |
| 156 | return NULL; |
| 157 | |
| 158 | current_frame = f; |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 159 | |
| 160 | trace = sysget("trace"); |
| 161 | if (trace != NULL) { |
| 162 | /* sys.trace, if defined, is a function that will |
| 163 | be called on *every* entry to a code block. |
| 164 | Its return value, if not None, is a function that |
| 165 | will be called at the start of each executed line |
| 166 | of code. (Actually, the function must return |
| 167 | itself in order to continue tracing.) |
| 168 | The trace functions are called with three arguments: |
| 169 | a pointer to the current frame, a string indicating |
| 170 | why the function is called, and an argument which |
| 171 | depends on the situation. The global trace function |
| 172 | (sys.trace) is also called whenever an exception |
| 173 | is detected. */ |
| 174 | trace = call_trace(trace, f, "call", arg); |
| 175 | if (trace == NULL) { |
| 176 | /* Trace function raised an error */ |
| 177 | sysset("trace", (object *)NULL); |
| 178 | current_frame = f->f_back; |
| 179 | DECREF(f); |
| 180 | return NULL; |
| 181 | } |
| 182 | if (trace == None) { |
| 183 | /* No need to trace this code block */ |
| 184 | DECREF(trace); |
| 185 | trace = NULL; |
| 186 | } |
| 187 | } |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 188 | |
| 189 | next_instr = GETUSTRINGVALUE(f->f_code->co_code); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 190 | stack_pointer = f->f_valuestack; |
| 191 | |
| 192 | if (arg != NULL) { |
| 193 | INCREF(arg); |
| 194 | PUSH(arg); |
| 195 | } |
| 196 | |
| 197 | why = WHY_NOT; |
| 198 | err = 0; |
| 199 | x = None; /* Not a reference, just anything non-NULL */ |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 200 | |
| 201 | for (;;) { |
Guido van Rossum | 4965bc8 | 1991-05-14 11:51:49 +0000 | [diff] [blame] | 202 | static int ticker; |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 203 | |
| 204 | /* Do periodic things */ |
| 205 | |
| 206 | if (--ticker < 0) { |
| 207 | ticker = 100; |
| 208 | if (intrcheck()) { |
| 209 | err_set(KeyboardInterrupt); |
| 210 | why = WHY_EXCEPTION; |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 211 | goto on_error; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | /* Extract opcode and argument */ |
| 216 | |
| 217 | opcode = NEXTOP(); |
| 218 | if (HAS_ARG(opcode)) |
| 219 | oparg = NEXTARG(); |
| 220 | |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 221 | #ifdef LLTRACE |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 222 | /* Instruction tracing */ |
| 223 | |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 224 | if (lltrace) { |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 225 | if (HAS_ARG(opcode)) { |
| 226 | printf("%d: %d, %d\n", |
| 227 | (int) (INSTR_OFFSET() - 3), |
| 228 | opcode, oparg); |
| 229 | } |
| 230 | else { |
| 231 | printf("%d: %d\n", |
| 232 | (int) (INSTR_OFFSET() - 1), opcode); |
| 233 | } |
| 234 | } |
| 235 | #endif |
| 236 | |
| 237 | /* Main switch on opcode */ |
| 238 | |
| 239 | switch (opcode) { |
| 240 | |
| 241 | /* BEWARE! |
| 242 | It is essential that any operation that fails sets either |
| 243 | x to NULL, err to nonzero, or why to anything but WHY_NOT, |
| 244 | and that no operation that succeeds does this! */ |
| 245 | |
| 246 | /* case STOP_CODE: this is an error! */ |
| 247 | |
| 248 | case POP_TOP: |
| 249 | v = POP(); |
| 250 | DECREF(v); |
| 251 | break; |
| 252 | |
| 253 | case ROT_TWO: |
| 254 | v = POP(); |
| 255 | w = POP(); |
| 256 | PUSH(v); |
| 257 | PUSH(w); |
| 258 | break; |
| 259 | |
| 260 | case ROT_THREE: |
| 261 | v = POP(); |
| 262 | w = POP(); |
| 263 | x = POP(); |
| 264 | PUSH(v); |
| 265 | PUSH(x); |
| 266 | PUSH(w); |
| 267 | break; |
| 268 | |
| 269 | case DUP_TOP: |
| 270 | v = TOP(); |
| 271 | INCREF(v); |
| 272 | PUSH(v); |
| 273 | break; |
| 274 | |
| 275 | case UNARY_POSITIVE: |
| 276 | v = POP(); |
| 277 | x = pos(v); |
| 278 | DECREF(v); |
| 279 | PUSH(x); |
| 280 | break; |
| 281 | |
| 282 | case UNARY_NEGATIVE: |
| 283 | v = POP(); |
| 284 | x = neg(v); |
| 285 | DECREF(v); |
| 286 | PUSH(x); |
| 287 | break; |
| 288 | |
| 289 | case UNARY_NOT: |
| 290 | v = POP(); |
| 291 | x = not(v); |
| 292 | DECREF(v); |
| 293 | PUSH(x); |
| 294 | break; |
| 295 | |
| 296 | case UNARY_CONVERT: |
| 297 | v = POP(); |
| 298 | x = reprobject(v); |
| 299 | DECREF(v); |
| 300 | PUSH(x); |
| 301 | break; |
| 302 | |
| 303 | case UNARY_CALL: |
| 304 | v = POP(); |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 305 | f->f_lasti = INSTR_OFFSET() - 1; /* For tracing */ |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 306 | x = call_object(v, (object *)NULL); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 307 | DECREF(v); |
| 308 | PUSH(x); |
| 309 | break; |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 310 | |
| 311 | case UNARY_INVERT: |
| 312 | v = POP(); |
| 313 | x = invert(v); |
| 314 | DECREF(v); |
| 315 | PUSH(x); |
| 316 | break; |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 317 | |
| 318 | case BINARY_MULTIPLY: |
| 319 | w = POP(); |
| 320 | v = POP(); |
| 321 | x = mul(v, w); |
| 322 | DECREF(v); |
| 323 | DECREF(w); |
| 324 | PUSH(x); |
| 325 | break; |
| 326 | |
| 327 | case BINARY_DIVIDE: |
| 328 | w = POP(); |
| 329 | v = POP(); |
| 330 | x = divide(v, w); |
| 331 | DECREF(v); |
| 332 | DECREF(w); |
| 333 | PUSH(x); |
| 334 | break; |
| 335 | |
| 336 | case BINARY_MODULO: |
| 337 | w = POP(); |
| 338 | v = POP(); |
| 339 | x = rem(v, w); |
| 340 | DECREF(v); |
| 341 | DECREF(w); |
| 342 | PUSH(x); |
| 343 | break; |
| 344 | |
| 345 | case BINARY_ADD: |
| 346 | w = POP(); |
| 347 | v = POP(); |
| 348 | x = add(v, w); |
| 349 | DECREF(v); |
| 350 | DECREF(w); |
| 351 | PUSH(x); |
| 352 | break; |
| 353 | |
| 354 | case BINARY_SUBTRACT: |
| 355 | w = POP(); |
| 356 | v = POP(); |
| 357 | x = sub(v, w); |
| 358 | DECREF(v); |
| 359 | DECREF(w); |
| 360 | PUSH(x); |
| 361 | break; |
| 362 | |
| 363 | case BINARY_SUBSCR: |
| 364 | w = POP(); |
| 365 | v = POP(); |
| 366 | x = apply_subscript(v, w); |
| 367 | DECREF(v); |
| 368 | DECREF(w); |
| 369 | PUSH(x); |
| 370 | break; |
| 371 | |
| 372 | case BINARY_CALL: |
| 373 | w = POP(); |
| 374 | v = POP(); |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 375 | f->f_lasti = INSTR_OFFSET() - 1; /* For tracing */ |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 376 | x = call_object(v, w); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 377 | DECREF(v); |
| 378 | DECREF(w); |
| 379 | PUSH(x); |
| 380 | break; |
| 381 | |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 382 | case BINARY_LSHIFT: |
| 383 | w = POP(); |
| 384 | v = POP(); |
| 385 | x = lshift(v, w); |
| 386 | DECREF(v); |
| 387 | DECREF(w); |
| 388 | PUSH(x); |
| 389 | break; |
| 390 | |
| 391 | case BINARY_RSHIFT: |
| 392 | w = POP(); |
| 393 | v = POP(); |
| 394 | x = rshift(v, w); |
| 395 | DECREF(v); |
| 396 | DECREF(w); |
| 397 | PUSH(x); |
| 398 | break; |
| 399 | |
| 400 | case BINARY_AND: |
| 401 | w = POP(); |
| 402 | v = POP(); |
| 403 | x = and(v, w); |
| 404 | DECREF(v); |
| 405 | DECREF(w); |
| 406 | PUSH(x); |
| 407 | break; |
| 408 | |
| 409 | case BINARY_XOR: |
| 410 | w = POP(); |
| 411 | v = POP(); |
| 412 | x = xor(v, w); |
| 413 | DECREF(v); |
| 414 | DECREF(w); |
| 415 | PUSH(x); |
| 416 | break; |
| 417 | |
| 418 | case BINARY_OR: |
| 419 | w = POP(); |
| 420 | v = POP(); |
| 421 | x = or(v, w); |
| 422 | DECREF(v); |
| 423 | DECREF(w); |
| 424 | PUSH(x); |
| 425 | break; |
| 426 | |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 427 | case SLICE+0: |
| 428 | case SLICE+1: |
| 429 | case SLICE+2: |
| 430 | case SLICE+3: |
| 431 | if ((opcode-SLICE) & 2) |
| 432 | w = POP(); |
| 433 | else |
| 434 | w = NULL; |
| 435 | if ((opcode-SLICE) & 1) |
| 436 | v = POP(); |
| 437 | else |
| 438 | v = NULL; |
| 439 | u = POP(); |
| 440 | x = apply_slice(u, v, w); |
| 441 | DECREF(u); |
| 442 | XDECREF(v); |
| 443 | XDECREF(w); |
| 444 | PUSH(x); |
| 445 | break; |
| 446 | |
| 447 | case STORE_SLICE+0: |
| 448 | case STORE_SLICE+1: |
| 449 | case STORE_SLICE+2: |
| 450 | case STORE_SLICE+3: |
| 451 | if ((opcode-STORE_SLICE) & 2) |
| 452 | w = POP(); |
| 453 | else |
| 454 | w = NULL; |
| 455 | if ((opcode-STORE_SLICE) & 1) |
| 456 | v = POP(); |
| 457 | else |
| 458 | v = NULL; |
| 459 | u = POP(); |
| 460 | t = POP(); |
| 461 | err = assign_slice(u, v, w, t); /* u[v:w] = t */ |
| 462 | DECREF(t); |
| 463 | DECREF(u); |
| 464 | XDECREF(v); |
| 465 | XDECREF(w); |
| 466 | break; |
| 467 | |
| 468 | case DELETE_SLICE+0: |
| 469 | case DELETE_SLICE+1: |
| 470 | case DELETE_SLICE+2: |
| 471 | case DELETE_SLICE+3: |
| 472 | if ((opcode-DELETE_SLICE) & 2) |
| 473 | w = POP(); |
| 474 | else |
| 475 | w = NULL; |
| 476 | if ((opcode-DELETE_SLICE) & 1) |
| 477 | v = POP(); |
| 478 | else |
| 479 | v = NULL; |
| 480 | u = POP(); |
| 481 | err = assign_slice(u, v, w, (object *)NULL); |
| 482 | /* del u[v:w] */ |
| 483 | DECREF(u); |
| 484 | XDECREF(v); |
| 485 | XDECREF(w); |
| 486 | break; |
| 487 | |
| 488 | case STORE_SUBSCR: |
| 489 | w = POP(); |
| 490 | v = POP(); |
| 491 | u = POP(); |
| 492 | /* v[w] = u */ |
| 493 | err = assign_subscript(v, w, u); |
| 494 | DECREF(u); |
| 495 | DECREF(v); |
| 496 | DECREF(w); |
| 497 | break; |
| 498 | |
| 499 | case DELETE_SUBSCR: |
| 500 | w = POP(); |
| 501 | v = POP(); |
| 502 | /* del v[w] */ |
| 503 | err = assign_subscript(v, w, (object *)NULL); |
| 504 | DECREF(v); |
| 505 | DECREF(w); |
| 506 | break; |
| 507 | |
| 508 | case PRINT_EXPR: |
| 509 | v = POP(); |
| 510 | fp = sysgetfile("stdout", stdout); |
| 511 | /* Print value except if procedure result */ |
| 512 | if (v != None) { |
| 513 | flushline(); |
| 514 | softspace(sysget("stdout"), 1); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 515 | err = printobject(v, fp, 0); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 516 | flushline(); |
| 517 | } |
| 518 | DECREF(v); |
| 519 | break; |
| 520 | |
| 521 | case PRINT_ITEM: |
| 522 | v = POP(); |
| 523 | fp = sysgetfile("stdout", stdout); |
| 524 | if (softspace(sysget("stdout"), 1)) |
| 525 | fprintf(fp, " "); |
| 526 | if (is_stringobject(v)) { |
| 527 | char *s = getstringvalue(v); |
| 528 | int len = getstringsize(v); |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 529 | fwrite(s, 1, len, fp); |
| 530 | if (len > 0 && s[len-1] == '\n') |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 531 | softspace(sysget("stdout"), 0); |
| 532 | } |
| 533 | else { |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 534 | err = printobject(v, fp, 0); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 535 | } |
| 536 | DECREF(v); |
| 537 | break; |
| 538 | |
| 539 | case PRINT_NEWLINE: |
| 540 | fp = sysgetfile("stdout", stdout); |
| 541 | fprintf(fp, "\n"); |
| 542 | softspace(sysget("stdout"), 0); |
| 543 | break; |
| 544 | |
| 545 | case BREAK_LOOP: |
| 546 | why = WHY_BREAK; |
| 547 | break; |
| 548 | |
| 549 | case RAISE_EXCEPTION: |
| 550 | v = POP(); |
| 551 | w = POP(); |
Guido van Rossum | 32c6cdf | 1991-12-10 13:52:46 +0000 | [diff] [blame] | 552 | /* A tuple is equivalent to its first element here */ |
| 553 | while (is_tupleobject(w)) { |
| 554 | u = w; |
| 555 | w = gettupleitem(u, 0); |
| 556 | DECREF(u); |
| 557 | } |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 558 | if (!is_stringobject(w)) |
| 559 | err_setstr(TypeError, |
| 560 | "exceptions must be strings"); |
| 561 | else |
| 562 | err_setval(w, v); |
| 563 | DECREF(v); |
| 564 | DECREF(w); |
| 565 | why = WHY_EXCEPTION; |
| 566 | break; |
| 567 | |
| 568 | case LOAD_LOCALS: |
| 569 | v = f->f_locals; |
| 570 | INCREF(v); |
| 571 | PUSH(v); |
| 572 | break; |
| 573 | |
| 574 | case RETURN_VALUE: |
| 575 | retval = POP(); |
| 576 | why = WHY_RETURN; |
| 577 | break; |
| 578 | |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 579 | case BUILD_FUNCTION: |
| 580 | v = POP(); |
| 581 | x = newfuncobject(v, f->f_globals); |
| 582 | DECREF(v); |
| 583 | PUSH(x); |
| 584 | break; |
| 585 | |
| 586 | case POP_BLOCK: |
| 587 | { |
| 588 | block *b = pop_block(f); |
| 589 | while (STACK_LEVEL() > b->b_level) { |
| 590 | v = POP(); |
| 591 | DECREF(v); |
| 592 | } |
| 593 | } |
| 594 | break; |
| 595 | |
| 596 | case END_FINALLY: |
| 597 | v = POP(); |
| 598 | if (is_intobject(v)) { |
| 599 | why = (enum why_code) getintvalue(v); |
| 600 | if (why == WHY_RETURN) |
| 601 | retval = POP(); |
| 602 | } |
| 603 | else if (is_stringobject(v)) { |
| 604 | w = POP(); |
| 605 | err_setval(v, w); |
| 606 | DECREF(w); |
| 607 | w = POP(); |
| 608 | tb_store(w); |
| 609 | DECREF(w); |
| 610 | why = WHY_RERAISE; |
| 611 | } |
| 612 | else if (v != None) { |
| 613 | err_setstr(SystemError, |
| 614 | "'finally' pops bad exception"); |
| 615 | why = WHY_EXCEPTION; |
| 616 | } |
| 617 | DECREF(v); |
| 618 | break; |
| 619 | |
| 620 | case BUILD_CLASS: |
| 621 | w = POP(); |
| 622 | v = POP(); |
| 623 | x = build_class(v, w); |
| 624 | PUSH(x); |
| 625 | DECREF(v); |
| 626 | DECREF(w); |
| 627 | break; |
| 628 | |
| 629 | case STORE_NAME: |
| 630 | w = GETNAMEV(oparg); |
| 631 | v = POP(); |
| 632 | err = dict2insert(f->f_locals, w, v); |
| 633 | DECREF(v); |
| 634 | break; |
| 635 | |
| 636 | case DELETE_NAME: |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 637 | w = GETNAMEV(oparg); |
| 638 | if ((err = dict2remove(f->f_locals, w)) != 0) |
| 639 | err_setstr(NameError, getstringvalue(w)); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 640 | break; |
| 641 | |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 642 | case UNPACK_ARG: |
| 643 | /* Implement various compatibility hacks: |
| 644 | (a) f(a,b,...) should accept f((1,2,...)) |
| 645 | (b) f((a,b,...)) should accept f(1,2,...) |
| 646 | (c) f(self,(a,b,...)) should accept f(x,1,2,...) |
| 647 | */ |
| 648 | { |
| 649 | int n; |
| 650 | if (EMPTY()) { |
| 651 | err_setstr(TypeError, |
| 652 | "no argument list"); |
| 653 | why = WHY_EXCEPTION; |
| 654 | break; |
| 655 | } |
| 656 | v = POP(); |
| 657 | if (!is_tupleobject(v)) { |
| 658 | err_setstr(TypeError, |
| 659 | "bad argument list"); |
| 660 | why = WHY_EXCEPTION; |
| 661 | break; |
| 662 | } |
| 663 | n = gettuplesize(v); |
| 664 | if (n == 1 && oparg != 1) { |
| 665 | /* Rule (a) */ |
| 666 | w = gettupleitem(v, 0); |
| 667 | if (is_tupleobject(w)) { |
| 668 | INCREF(w); |
| 669 | DECREF(v); |
| 670 | v = w; |
| 671 | n = gettuplesize(v); |
| 672 | } |
| 673 | } |
| 674 | else if (n != 1 && oparg == 1) { |
| 675 | /* Rule (b) */ |
| 676 | PUSH(v); |
| 677 | break; |
| 678 | /* Don't fall through */ |
| 679 | } |
| 680 | else if (n > 2 && oparg == 2) { |
| 681 | /* Rule (c) */ |
| 682 | int i; |
| 683 | w = newtupleobject(n-1); |
| 684 | u = newtupleobject(2); |
| 685 | if (u == NULL || w == NULL) { |
| 686 | XDECREF(w); |
| 687 | XDECREF(u); |
| 688 | DECREF(v); |
| 689 | why = WHY_EXCEPTION; |
| 690 | break; |
| 691 | } |
| 692 | t = gettupleitem(v, 0); |
| 693 | INCREF(t); |
| 694 | settupleitem(u, 0, t); |
| 695 | for (i = 1; i < n; i++) { |
| 696 | t = gettupleitem(v, i); |
| 697 | INCREF(t); |
| 698 | settupleitem(w, i-1, t); |
| 699 | } |
| 700 | settupleitem(u, 1, w); |
| 701 | DECREF(v); |
| 702 | v = u; |
| 703 | n = 2; |
| 704 | } |
| 705 | if (n != oparg) { |
| 706 | err_setstr(TypeError, |
| 707 | "arg count mismatch"); |
| 708 | why = WHY_EXCEPTION; |
| 709 | DECREF(v); |
| 710 | break; |
| 711 | } |
| 712 | PUSH(v); |
| 713 | } |
| 714 | /* Fall through */ |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 715 | case UNPACK_TUPLE: |
| 716 | v = POP(); |
| 717 | if (!is_tupleobject(v)) { |
| 718 | err_setstr(TypeError, "unpack non-tuple"); |
| 719 | why = WHY_EXCEPTION; |
| 720 | } |
| 721 | else if (gettuplesize(v) != oparg) { |
Guido van Rossum | 32c6cdf | 1991-12-10 13:52:46 +0000 | [diff] [blame] | 722 | err_setstr(ValueError, |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 723 | "unpack tuple of wrong size"); |
| 724 | why = WHY_EXCEPTION; |
| 725 | } |
| 726 | else { |
| 727 | for (; --oparg >= 0; ) { |
| 728 | w = gettupleitem(v, oparg); |
| 729 | INCREF(w); |
| 730 | PUSH(w); |
| 731 | } |
| 732 | } |
| 733 | DECREF(v); |
| 734 | break; |
| 735 | |
| 736 | case UNPACK_LIST: |
| 737 | v = POP(); |
| 738 | if (!is_listobject(v)) { |
| 739 | err_setstr(TypeError, "unpack non-list"); |
| 740 | why = WHY_EXCEPTION; |
| 741 | } |
| 742 | else if (getlistsize(v) != oparg) { |
Guido van Rossum | 32c6cdf | 1991-12-10 13:52:46 +0000 | [diff] [blame] | 743 | err_setstr(ValueError, |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 744 | "unpack list of wrong size"); |
| 745 | why = WHY_EXCEPTION; |
| 746 | } |
| 747 | else { |
| 748 | for (; --oparg >= 0; ) { |
| 749 | w = getlistitem(v, oparg); |
| 750 | INCREF(w); |
| 751 | PUSH(w); |
| 752 | } |
| 753 | } |
| 754 | DECREF(v); |
| 755 | break; |
| 756 | |
| 757 | case STORE_ATTR: |
| 758 | name = GETNAME(oparg); |
| 759 | v = POP(); |
| 760 | u = POP(); |
| 761 | err = setattr(v, name, u); /* v.name = u */ |
| 762 | DECREF(v); |
| 763 | DECREF(u); |
| 764 | break; |
| 765 | |
| 766 | case DELETE_ATTR: |
| 767 | name = GETNAME(oparg); |
| 768 | v = POP(); |
| 769 | err = setattr(v, name, (object *)NULL); |
| 770 | /* del v.name */ |
| 771 | DECREF(v); |
| 772 | break; |
| 773 | |
Guido van Rossum | 32c6cdf | 1991-12-10 13:52:46 +0000 | [diff] [blame] | 774 | case STORE_GLOBAL: |
| 775 | w = GETNAMEV(oparg); |
| 776 | v = POP(); |
| 777 | err = dict2insert(f->f_globals, w, v); |
| 778 | DECREF(v); |
| 779 | break; |
| 780 | |
| 781 | case DELETE_GLOBAL: |
| 782 | w = GETNAMEV(oparg); |
| 783 | if ((err = dict2remove(f->f_globals, w)) != 0) |
| 784 | err_setstr(NameError, getstringvalue(w)); |
| 785 | break; |
| 786 | |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 787 | case LOAD_CONST: |
| 788 | x = GETCONST(oparg); |
| 789 | INCREF(x); |
| 790 | PUSH(x); |
| 791 | break; |
| 792 | |
| 793 | case LOAD_NAME: |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 794 | w = GETNAMEV(oparg); |
| 795 | x = dict2lookup(f->f_locals, w); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 796 | if (x == NULL) { |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 797 | err_clear(); |
| 798 | x = dict2lookup(f->f_globals, w); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 799 | if (x == NULL) { |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 800 | err_clear(); |
| 801 | x = getbuiltin(w); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 802 | if (x == NULL) { |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 803 | err_setstr(NameError, |
| 804 | getstringvalue(w)); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 805 | break; |
| 806 | } |
| 807 | } |
| 808 | } |
| 809 | INCREF(x); |
| 810 | PUSH(x); |
| 811 | break; |
| 812 | |
| 813 | case LOAD_GLOBAL: |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 814 | w = GETNAMEV(oparg); |
| 815 | x = dict2lookup(f->f_globals, w); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 816 | if (x == NULL) { |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 817 | err_clear(); |
| 818 | x = getbuiltin(w); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 819 | if (x == NULL) { |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 820 | err_setstr(NameError, |
| 821 | getstringvalue(w)); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 822 | break; |
| 823 | } |
| 824 | } |
| 825 | INCREF(x); |
| 826 | PUSH(x); |
| 827 | break; |
| 828 | |
| 829 | case LOAD_LOCAL: |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 830 | w = GETNAMEV(oparg); |
| 831 | x = dict2lookup(f->f_locals, w); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 832 | if (x == NULL) { |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 833 | err_setstr(NameError, getstringvalue(w)); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 834 | break; |
| 835 | } |
| 836 | INCREF(x); |
| 837 | PUSH(x); |
| 838 | break; |
| 839 | |
| 840 | case BUILD_TUPLE: |
| 841 | x = newtupleobject(oparg); |
| 842 | if (x != NULL) { |
| 843 | for (; --oparg >= 0;) { |
| 844 | w = POP(); |
| 845 | err = settupleitem(x, oparg, w); |
| 846 | if (err != 0) |
| 847 | break; |
| 848 | } |
| 849 | PUSH(x); |
| 850 | } |
| 851 | break; |
| 852 | |
| 853 | case BUILD_LIST: |
| 854 | x = newlistobject(oparg); |
| 855 | if (x != NULL) { |
| 856 | for (; --oparg >= 0;) { |
| 857 | w = POP(); |
| 858 | err = setlistitem(x, oparg, w); |
| 859 | if (err != 0) |
| 860 | break; |
| 861 | } |
| 862 | PUSH(x); |
| 863 | } |
| 864 | break; |
| 865 | |
| 866 | case BUILD_MAP: |
| 867 | x = newdictobject(); |
| 868 | PUSH(x); |
| 869 | break; |
| 870 | |
| 871 | case LOAD_ATTR: |
| 872 | name = GETNAME(oparg); |
| 873 | v = POP(); |
| 874 | x = getattr(v, name); |
| 875 | DECREF(v); |
| 876 | PUSH(x); |
| 877 | break; |
| 878 | |
| 879 | case COMPARE_OP: |
| 880 | w = POP(); |
| 881 | v = POP(); |
| 882 | x = cmp_outcome((enum cmp_op)oparg, v, w); |
| 883 | DECREF(v); |
| 884 | DECREF(w); |
| 885 | PUSH(x); |
| 886 | break; |
| 887 | |
| 888 | case IMPORT_NAME: |
| 889 | name = GETNAME(oparg); |
| 890 | x = import_module(name); |
| 891 | XINCREF(x); |
| 892 | PUSH(x); |
| 893 | break; |
| 894 | |
| 895 | case IMPORT_FROM: |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 896 | w = GETNAMEV(oparg); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 897 | v = TOP(); |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 898 | err = import_from(f->f_locals, v, w); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 899 | break; |
| 900 | |
| 901 | case JUMP_FORWARD: |
| 902 | JUMPBY(oparg); |
| 903 | break; |
| 904 | |
| 905 | case JUMP_IF_FALSE: |
| 906 | if (!testbool(TOP())) |
| 907 | JUMPBY(oparg); |
| 908 | break; |
| 909 | |
| 910 | case JUMP_IF_TRUE: |
| 911 | if (testbool(TOP())) |
| 912 | JUMPBY(oparg); |
| 913 | break; |
| 914 | |
| 915 | case JUMP_ABSOLUTE: |
| 916 | JUMPTO(oparg); |
| 917 | break; |
| 918 | |
| 919 | case FOR_LOOP: |
| 920 | /* for v in s: ... |
| 921 | On entry: stack contains s, i. |
| 922 | On exit: stack contains s, i+1, s[i]; |
| 923 | but if loop exhausted: |
| 924 | s, i are popped, and we jump */ |
| 925 | w = POP(); /* Loop index */ |
| 926 | v = POP(); /* Sequence object */ |
| 927 | u = loop_subscript(v, w); |
| 928 | if (u != NULL) { |
| 929 | PUSH(v); |
| 930 | x = newintobject(getintvalue(w)+1); |
| 931 | PUSH(x); |
| 932 | DECREF(w); |
| 933 | PUSH(u); |
| 934 | } |
| 935 | else { |
| 936 | DECREF(v); |
| 937 | DECREF(w); |
| 938 | /* A NULL can mean "s exhausted" |
| 939 | but also an error: */ |
| 940 | if (err_occurred()) |
| 941 | why = WHY_EXCEPTION; |
| 942 | else |
| 943 | JUMPBY(oparg); |
| 944 | } |
| 945 | break; |
| 946 | |
| 947 | case SETUP_LOOP: |
| 948 | case SETUP_EXCEPT: |
| 949 | case SETUP_FINALLY: |
| 950 | setup_block(f, opcode, INSTR_OFFSET() + oparg, |
| 951 | STACK_LEVEL()); |
| 952 | break; |
| 953 | |
| 954 | case SET_LINENO: |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 955 | #ifdef LLTRACE |
| 956 | if (lltrace) |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 957 | printf("--- Line %d ---\n", oparg); |
| 958 | #endif |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 959 | f->f_lineno = oparg; |
| 960 | if (trace != NULL) { |
| 961 | /* Trace each line of code reached */ |
| 962 | f->f_lasti = INSTR_OFFSET(); |
| 963 | x = call_trace(trace, f, "line", None); |
| 964 | /* The trace function must return itself |
| 965 | in order to continue tracing */ |
| 966 | DECREF(trace); |
| 967 | if (x == None) { |
| 968 | DECREF(x); |
| 969 | trace = NULL; |
| 970 | } |
| 971 | else |
| 972 | trace = x; |
| 973 | } |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 974 | break; |
| 975 | |
| 976 | default: |
| 977 | fprintf(stderr, |
| 978 | "XXX lineno: %d, opcode: %d\n", |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 979 | f->f_lineno, opcode); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 980 | err_setstr(SystemError, "eval_code: unknown opcode"); |
| 981 | why = WHY_EXCEPTION; |
| 982 | break; |
| 983 | |
| 984 | } /* switch */ |
| 985 | |
| 986 | on_error: |
| 987 | |
| 988 | /* Quickly continue if no error occurred */ |
| 989 | |
| 990 | if (why == WHY_NOT) { |
| 991 | if (err == 0 && x != NULL) |
| 992 | continue; /* Normal, fast path */ |
| 993 | why = WHY_EXCEPTION; |
| 994 | x = None; |
| 995 | err = 0; |
| 996 | } |
| 997 | |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 998 | #ifndef CHECKEXC |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 999 | /* Double-check exception status */ |
| 1000 | |
| 1001 | if (why == WHY_EXCEPTION || why == WHY_RERAISE) { |
| 1002 | if (!err_occurred()) { |
| 1003 | fprintf(stderr, "XXX ghost error\n"); |
| 1004 | err_setstr(SystemError, "ghost error"); |
| 1005 | why = WHY_EXCEPTION; |
| 1006 | } |
| 1007 | } |
| 1008 | else { |
| 1009 | if (err_occurred()) { |
| 1010 | fprintf(stderr, "XXX undetected error\n"); |
| 1011 | why = WHY_EXCEPTION; |
| 1012 | } |
| 1013 | } |
| 1014 | #endif |
| 1015 | |
| 1016 | /* Log traceback info if this is a real exception */ |
| 1017 | |
| 1018 | if (why == WHY_EXCEPTION) { |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 1019 | f->f_lasti = INSTR_OFFSET() - 1; |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 1020 | if (HAS_ARG(opcode)) |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 1021 | f->f_lasti -= 2; |
| 1022 | tb_here(f); |
| 1023 | |
| 1024 | if (trace) |
| 1025 | v = trace; |
| 1026 | else |
| 1027 | v = sysget("trace"); |
| 1028 | if (v) { |
| 1029 | object *type, *value, *traceback, *arg; |
| 1030 | err_get(&type, &value); |
| 1031 | traceback = tb_fetch(); |
| 1032 | arg = newtupleobject(3); |
| 1033 | if (arg == NULL) |
| 1034 | err_clear(); |
| 1035 | else { |
| 1036 | settupleitem(arg, 0, type); |
| 1037 | settupleitem(arg, 1, value); |
| 1038 | settupleitem(arg, 2, traceback); |
| 1039 | } |
| 1040 | v = call_trace(v, f, "exception", arg); |
| 1041 | if (v == NULL) { |
| 1042 | /* Trace function raised error */ |
| 1043 | tb_here(f); |
| 1044 | sysset("trace", (object *)NULL); |
| 1045 | XDECREF(trace); |
| 1046 | trace = NULL; |
| 1047 | } |
| 1048 | else { |
| 1049 | /* Restore original exception */ |
| 1050 | err_setval(type, value); |
| 1051 | tb_store(traceback); |
| 1052 | if (v == None) |
| 1053 | DECREF(v); |
| 1054 | else { |
| 1055 | /* Set trace function */ |
| 1056 | XDECREF(trace); |
| 1057 | trace = v; |
| 1058 | } |
| 1059 | } |
| 1060 | XDECREF(arg); |
| 1061 | } |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 1062 | } |
| 1063 | |
| 1064 | /* For the rest, treat WHY_RERAISE as WHY_EXCEPTION */ |
| 1065 | |
| 1066 | if (why == WHY_RERAISE) |
| 1067 | why = WHY_EXCEPTION; |
| 1068 | |
| 1069 | /* Unwind stacks if a (pseudo) exception occurred */ |
| 1070 | |
| 1071 | while (why != WHY_NOT && f->f_iblock > 0) { |
| 1072 | block *b = pop_block(f); |
| 1073 | while (STACK_LEVEL() > b->b_level) { |
| 1074 | v = POP(); |
| 1075 | XDECREF(v); |
| 1076 | } |
| 1077 | if (b->b_type == SETUP_LOOP && why == WHY_BREAK) { |
| 1078 | why = WHY_NOT; |
| 1079 | JUMPTO(b->b_handler); |
| 1080 | break; |
| 1081 | } |
| 1082 | if (b->b_type == SETUP_FINALLY || |
| 1083 | b->b_type == SETUP_EXCEPT && |
| 1084 | why == WHY_EXCEPTION) { |
| 1085 | if (why == WHY_EXCEPTION) { |
| 1086 | object *exc, *val; |
| 1087 | err_get(&exc, &val); |
| 1088 | if (val == NULL) { |
| 1089 | val = None; |
| 1090 | INCREF(val); |
| 1091 | } |
| 1092 | v = tb_fetch(); |
| 1093 | /* Make the raw exception data |
| 1094 | available to the handler, |
| 1095 | so a program can emulate the |
| 1096 | Python main loop. Don't do |
| 1097 | this for 'finally'. */ |
| 1098 | if (b->b_type == SETUP_EXCEPT) { |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 1099 | sysset("exc_traceback", v); |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 1100 | sysset("exc_value", val); |
| 1101 | sysset("exc_type", exc); |
| 1102 | err_clear(); |
| 1103 | } |
| 1104 | PUSH(v); |
| 1105 | PUSH(val); |
| 1106 | PUSH(exc); |
| 1107 | } |
| 1108 | else { |
| 1109 | if (why == WHY_RETURN) |
| 1110 | PUSH(retval); |
| 1111 | v = newintobject((long)why); |
| 1112 | PUSH(v); |
| 1113 | } |
| 1114 | why = WHY_NOT; |
| 1115 | JUMPTO(b->b_handler); |
| 1116 | break; |
| 1117 | } |
| 1118 | } /* unwind stack */ |
| 1119 | |
| 1120 | /* End the loop if we still have an error (or return) */ |
| 1121 | |
| 1122 | if (why != WHY_NOT) |
| 1123 | break; |
| 1124 | |
| 1125 | } /* main loop */ |
| 1126 | |
| 1127 | /* Pop remaining stack entries */ |
| 1128 | |
| 1129 | while (!EMPTY()) { |
| 1130 | v = POP(); |
| 1131 | XDECREF(v); |
| 1132 | } |
| 1133 | |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 1134 | if (why != WHY_RETURN) |
| 1135 | retval = NULL; |
| 1136 | |
| 1137 | if (trace) { |
| 1138 | if (why == WHY_RETURN) { |
| 1139 | x = call_trace(trace, f, "return", retval); |
| 1140 | if (x == NULL) { |
| 1141 | XDECREF(retval); |
| 1142 | retval = NULL; |
| 1143 | } |
| 1144 | else |
| 1145 | DECREF(x); |
| 1146 | } |
| 1147 | DECREF(trace); |
| 1148 | } |
| 1149 | |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 1150 | /* Restore previous frame and release the current one */ |
| 1151 | |
| 1152 | current_frame = f->f_back; |
| 1153 | DECREF(f); |
| 1154 | |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 1155 | return retval; |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 1156 | } |
| 1157 | |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 1158 | #ifdef LLTRACE |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1159 | static int |
| 1160 | prtrace(v, str) |
| 1161 | object *v; |
| 1162 | char *str; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1163 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1164 | printf("%s ", str); |
Guido van Rossum | 9093361 | 1991-06-07 16:10:43 +0000 | [diff] [blame] | 1165 | if (printobject(v, stdout, 0) != 0) |
| 1166 | err_clear(); /* Don't know what else to do */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1167 | printf("\n"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1168 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1169 | #endif |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1170 | |
Guido van Rossum | 96a42c8 | 1992-01-12 02:29:51 +0000 | [diff] [blame^] | 1171 | static object * |
| 1172 | call_trace(trace, f, msg, arg) |
| 1173 | object *trace; |
| 1174 | frameobject *f; |
| 1175 | char *msg; |
| 1176 | object *arg; |
| 1177 | { |
| 1178 | object *arglist, *what, *res; |
| 1179 | static int tracing = 0; |
| 1180 | |
| 1181 | if (tracing) { |
| 1182 | /* Don't trace the trace code! */ |
| 1183 | INCREF(None); |
| 1184 | return None; |
| 1185 | } |
| 1186 | |
| 1187 | arglist = newtupleobject(3); |
| 1188 | if (arglist == NULL) |
| 1189 | return NULL; |
| 1190 | what = newstringobject(msg); |
| 1191 | if (what == NULL) { |
| 1192 | DECREF(arglist); |
| 1193 | return NULL; |
| 1194 | } |
| 1195 | INCREF(f); |
| 1196 | if (arg == NULL) |
| 1197 | arg = None; |
| 1198 | INCREF(arg); |
| 1199 | settupleitem(arglist, 0, (object *)f); |
| 1200 | settupleitem(arglist, 1, what); |
| 1201 | settupleitem(arglist, 2, arg); |
| 1202 | tracing++; |
| 1203 | res = call_object(trace, arglist); |
| 1204 | tracing--; |
| 1205 | if (res == NULL) |
| 1206 | tb_here(f); |
| 1207 | DECREF(arglist); |
| 1208 | return res; |
| 1209 | } |
| 1210 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1211 | object * |
| 1212 | getlocals() |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1213 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1214 | if (current_frame == NULL) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1215 | return NULL; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1216 | else |
| 1217 | return current_frame->f_locals; |
| 1218 | } |
| 1219 | |
| 1220 | object * |
| 1221 | getglobals() |
| 1222 | { |
| 1223 | if (current_frame == NULL) |
| 1224 | return NULL; |
| 1225 | else |
| 1226 | return current_frame->f_globals; |
| 1227 | } |
| 1228 | |
| 1229 | void |
| 1230 | printtraceback(fp) |
| 1231 | FILE *fp; |
| 1232 | { |
| 1233 | object *v = tb_fetch(); |
| 1234 | if (v != NULL) { |
| 1235 | fprintf(fp, "Stack backtrace (innermost last):\n"); |
| 1236 | tb_print(v, fp); |
| 1237 | DECREF(v); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1238 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1239 | } |
| 1240 | |
| 1241 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1242 | void |
| 1243 | flushline() |
| 1244 | { |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 1245 | if (softspace(sysget("stdout"), 0)) |
| 1246 | fprintf(sysgetfile("stdout", stdout), "\n"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1247 | } |
| 1248 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1249 | |
| 1250 | /* Test a value used as condition, e.g., in a for or if statement */ |
| 1251 | |
| 1252 | static int |
| 1253 | testbool(v) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1254 | object *v; |
| 1255 | { |
Guido van Rossum | 4965bc8 | 1991-05-14 11:51:49 +0000 | [diff] [blame] | 1256 | if (v == None) |
| 1257 | return 0; |
| 1258 | if (v->ob_type->tp_as_number != NULL) |
| 1259 | return (*v->ob_type->tp_as_number->nb_nonzero)(v); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1260 | if (v->ob_type->tp_as_sequence != NULL) |
| 1261 | return (*v->ob_type->tp_as_sequence->sq_length)(v) != 0; |
| 1262 | if (v->ob_type->tp_as_mapping != NULL) |
| 1263 | return (*v->ob_type->tp_as_mapping->mp_length)(v) != 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1264 | /* All other objects are 'true' */ |
| 1265 | return 1; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1266 | } |
| 1267 | |
| 1268 | static object * |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 1269 | or(v, w) |
| 1270 | object *v, *w; |
| 1271 | { |
| 1272 | if (v->ob_type->tp_as_number != NULL) { |
| 1273 | object *x; |
| 1274 | object * (*f) FPROTO((object *, object *)); |
| 1275 | if (coerce(&v, &w) != 0) |
| 1276 | return NULL; |
| 1277 | if ((f = v->ob_type->tp_as_number->nb_or) != NULL) |
| 1278 | x = (*f)(v, w); |
| 1279 | DECREF(v); |
| 1280 | DECREF(w); |
| 1281 | if (f != NULL) |
| 1282 | return x; |
| 1283 | } |
| 1284 | err_setstr(TypeError, "bad operand type(s) for |"); |
| 1285 | return NULL; |
| 1286 | } |
| 1287 | |
| 1288 | static object * |
| 1289 | xor(v, w) |
| 1290 | object *v, *w; |
| 1291 | { |
| 1292 | if (v->ob_type->tp_as_number != NULL) { |
| 1293 | object *x; |
| 1294 | object * (*f) FPROTO((object *, object *)); |
| 1295 | if (coerce(&v, &w) != 0) |
| 1296 | return NULL; |
| 1297 | if ((f = v->ob_type->tp_as_number->nb_xor) != NULL) |
| 1298 | x = (*f)(v, w); |
| 1299 | DECREF(v); |
| 1300 | DECREF(w); |
| 1301 | if (f != NULL) |
| 1302 | return x; |
| 1303 | } |
| 1304 | err_setstr(TypeError, "bad operand type(s) for ^"); |
| 1305 | return NULL; |
| 1306 | } |
| 1307 | |
| 1308 | static object * |
| 1309 | and(v, w) |
| 1310 | object *v, *w; |
| 1311 | { |
| 1312 | if (v->ob_type->tp_as_number != NULL) { |
| 1313 | object *x; |
| 1314 | object * (*f) FPROTO((object *, object *)); |
| 1315 | if (coerce(&v, &w) != 0) |
| 1316 | return NULL; |
| 1317 | if ((f = v->ob_type->tp_as_number->nb_and) != NULL) |
| 1318 | x = (*f)(v, w); |
| 1319 | DECREF(v); |
| 1320 | DECREF(w); |
| 1321 | if (f != NULL) |
| 1322 | return x; |
| 1323 | } |
| 1324 | err_setstr(TypeError, "bad operand type(s) for &"); |
| 1325 | return NULL; |
| 1326 | } |
| 1327 | |
| 1328 | static object * |
| 1329 | lshift(v, w) |
| 1330 | object *v, *w; |
| 1331 | { |
| 1332 | if (v->ob_type->tp_as_number != NULL) { |
| 1333 | object *x; |
| 1334 | object * (*f) FPROTO((object *, object *)); |
| 1335 | if (coerce(&v, &w) != 0) |
| 1336 | return NULL; |
| 1337 | if ((f = v->ob_type->tp_as_number->nb_lshift) != NULL) |
| 1338 | x = (*f)(v, w); |
| 1339 | DECREF(v); |
| 1340 | DECREF(w); |
| 1341 | if (f != NULL) |
| 1342 | return x; |
| 1343 | } |
| 1344 | err_setstr(TypeError, "bad operand type(s) for <<"); |
| 1345 | return NULL; |
| 1346 | } |
| 1347 | |
| 1348 | static object * |
| 1349 | rshift(v, w) |
| 1350 | object *v, *w; |
| 1351 | { |
| 1352 | if (v->ob_type->tp_as_number != NULL) { |
| 1353 | object *x; |
| 1354 | object * (*f) FPROTO((object *, object *)); |
| 1355 | if (coerce(&v, &w) != 0) |
| 1356 | return NULL; |
| 1357 | if ((f = v->ob_type->tp_as_number->nb_rshift) != NULL) |
| 1358 | x = (*f)(v, w); |
| 1359 | DECREF(v); |
| 1360 | DECREF(w); |
| 1361 | if (f != NULL) |
| 1362 | return x; |
| 1363 | } |
| 1364 | err_setstr(TypeError, "bad operand type(s) for >>"); |
| 1365 | return NULL; |
| 1366 | } |
| 1367 | |
| 1368 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1369 | add(v, w) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1370 | object *v, *w; |
| 1371 | { |
Guido van Rossum | 89d55ca | 1991-07-01 18:43:13 +0000 | [diff] [blame] | 1372 | if (v->ob_type->tp_as_number != NULL) { |
| 1373 | object *x; |
| 1374 | if (coerce(&v, &w) != 0) |
| 1375 | return NULL; |
| 1376 | x = (*v->ob_type->tp_as_number->nb_add)(v, w); |
| 1377 | DECREF(v); |
| 1378 | DECREF(w); |
| 1379 | return x; |
| 1380 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1381 | else if (v->ob_type->tp_as_sequence != NULL) |
Guido van Rossum | 89d55ca | 1991-07-01 18:43:13 +0000 | [diff] [blame] | 1382 | return (*v->ob_type->tp_as_sequence->sq_concat)(v, w); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1383 | else { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1384 | err_setstr(TypeError, "+ not supported by operands"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1385 | return NULL; |
| 1386 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1387 | } |
| 1388 | |
| 1389 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1390 | sub(v, w) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1391 | object *v, *w; |
| 1392 | { |
Guido van Rossum | 89d55ca | 1991-07-01 18:43:13 +0000 | [diff] [blame] | 1393 | if (v->ob_type->tp_as_number != NULL) { |
| 1394 | object *x; |
| 1395 | if (coerce(&v, &w) != 0) |
| 1396 | return NULL; |
| 1397 | x = (*v->ob_type->tp_as_number->nb_subtract)(v, w); |
| 1398 | DECREF(v); |
| 1399 | DECREF(w); |
| 1400 | return x; |
| 1401 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1402 | err_setstr(TypeError, "bad operand type(s) for -"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1403 | return NULL; |
| 1404 | } |
| 1405 | |
| 1406 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1407 | mul(v, w) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1408 | object *v, *w; |
| 1409 | { |
| 1410 | typeobject *tp; |
| 1411 | if (is_intobject(v) && w->ob_type->tp_as_sequence != NULL) { |
| 1412 | /* int*sequence -- swap v and w */ |
| 1413 | object *tmp = v; |
| 1414 | v = w; |
| 1415 | w = tmp; |
| 1416 | } |
| 1417 | tp = v->ob_type; |
Guido van Rossum | 89d55ca | 1991-07-01 18:43:13 +0000 | [diff] [blame] | 1418 | if (tp->tp_as_number != NULL) { |
| 1419 | object *x; |
| 1420 | if (coerce(&v, &w) != 0) |
| 1421 | return NULL; |
| 1422 | x = (*v->ob_type->tp_as_number->nb_multiply)(v, w); |
| 1423 | DECREF(v); |
| 1424 | DECREF(w); |
| 1425 | return x; |
| 1426 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1427 | if (tp->tp_as_sequence != NULL) { |
| 1428 | if (!is_intobject(w)) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1429 | err_setstr(TypeError, |
| 1430 | "can't multiply sequence with non-int"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1431 | return NULL; |
| 1432 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1433 | return (*tp->tp_as_sequence->sq_repeat) |
| 1434 | (v, (int)getintvalue(w)); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1435 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1436 | err_setstr(TypeError, "bad operand type(s) for *"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1437 | return NULL; |
| 1438 | } |
| 1439 | |
| 1440 | static object * |
Guido van Rossum | 40d0b7e | 1990-12-20 23:03:11 +0000 | [diff] [blame] | 1441 | divide(v, w) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1442 | object *v, *w; |
| 1443 | { |
Guido van Rossum | 89d55ca | 1991-07-01 18:43:13 +0000 | [diff] [blame] | 1444 | if (v->ob_type->tp_as_number != NULL) { |
| 1445 | object *x; |
| 1446 | if (coerce(&v, &w) != 0) |
| 1447 | return NULL; |
| 1448 | x = (*v->ob_type->tp_as_number->nb_divide)(v, w); |
| 1449 | DECREF(v); |
| 1450 | DECREF(w); |
| 1451 | return x; |
| 1452 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1453 | err_setstr(TypeError, "bad operand type(s) for /"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1454 | return NULL; |
| 1455 | } |
| 1456 | |
| 1457 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1458 | rem(v, w) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1459 | object *v, *w; |
| 1460 | { |
Guido van Rossum | 89d55ca | 1991-07-01 18:43:13 +0000 | [diff] [blame] | 1461 | if (v->ob_type->tp_as_number != NULL) { |
| 1462 | object *x; |
| 1463 | if (coerce(&v, &w) != 0) |
| 1464 | return NULL; |
| 1465 | x = (*v->ob_type->tp_as_number->nb_remainder)(v, w); |
| 1466 | DECREF(v); |
| 1467 | DECREF(w); |
| 1468 | return x; |
| 1469 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1470 | err_setstr(TypeError, "bad operand type(s) for %"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1471 | return NULL; |
| 1472 | } |
| 1473 | |
| 1474 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1475 | neg(v) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1476 | object *v; |
| 1477 | { |
| 1478 | if (v->ob_type->tp_as_number != NULL) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1479 | return (*v->ob_type->tp_as_number->nb_negative)(v); |
| 1480 | err_setstr(TypeError, "bad operand type(s) for unary -"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1481 | return NULL; |
| 1482 | } |
| 1483 | |
| 1484 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1485 | pos(v) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1486 | object *v; |
| 1487 | { |
| 1488 | if (v->ob_type->tp_as_number != NULL) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1489 | return (*v->ob_type->tp_as_number->nb_positive)(v); |
| 1490 | err_setstr(TypeError, "bad operand type(s) for unary +"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1491 | return NULL; |
| 1492 | } |
| 1493 | |
| 1494 | static object * |
Guido van Rossum | 7928cd7 | 1991-10-24 14:59:31 +0000 | [diff] [blame] | 1495 | invert(v) |
| 1496 | object *v; |
| 1497 | { |
| 1498 | object * (*f) FPROTO((object *, object *)); |
| 1499 | if (v->ob_type->tp_as_number != NULL && |
| 1500 | (f = v->ob_type->tp_as_number->nb_invert) != NULL) |
| 1501 | return (*f)(v); |
| 1502 | err_setstr(TypeError, "bad operand type(s) for unary ~"); |
| 1503 | return NULL; |
| 1504 | } |
| 1505 | |
| 1506 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1507 | not(v) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1508 | object *v; |
| 1509 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1510 | int outcome = testbool(v); |
| 1511 | object *w = outcome == 0 ? True : False; |
| 1512 | INCREF(w); |
| 1513 | return w; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1514 | } |
Guido van Rossum | 83bf35c | 1991-07-27 21:32:34 +0000 | [diff] [blame] | 1515 | /* External interface to call any callable object. The arg may be NULL. */ |
| 1516 | |
| 1517 | object * |
| 1518 | call_object(func, arg) |
| 1519 | object *func; |
| 1520 | object *arg; |
| 1521 | { |
| 1522 | if (is_instancemethodobject(func) || is_funcobject(func)) |
| 1523 | return call_function(func, arg); |
| 1524 | else |
| 1525 | return call_builtin(func, arg); |
| 1526 | } |
| 1527 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1528 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1529 | call_builtin(func, arg) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1530 | object *func; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1531 | object *arg; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1532 | { |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1533 | if (is_methodobject(func)) { |
| 1534 | method meth = getmethod(func); |
| 1535 | object *self = getself(func); |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 1536 | if (!getvarargs(func) && arg != NULL && is_tupleobject(arg)) { |
| 1537 | int size = gettuplesize(arg); |
| 1538 | if (size == 1) |
| 1539 | arg = gettupleitem(arg, 0); |
| 1540 | else if (size == 0) |
| 1541 | arg = NULL; |
| 1542 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1543 | return (*meth)(self, arg); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1544 | } |
| 1545 | if (is_classobject(func)) { |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 1546 | if (arg != NULL && |
| 1547 | !(is_tupleobject(arg) && |
| 1548 | gettuplesize(arg) == 0)) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1549 | err_setstr(TypeError, |
| 1550 | "classobject() allows no arguments"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1551 | return NULL; |
| 1552 | } |
Guido van Rossum | 374a922 | 1991-04-04 10:40:29 +0000 | [diff] [blame] | 1553 | return newinstanceobject(func); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1554 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1555 | err_setstr(TypeError, "call of non-function"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1556 | return NULL; |
| 1557 | } |
| 1558 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1559 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1560 | call_function(func, arg) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1561 | object *func; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1562 | object *arg; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1563 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1564 | object *newarg = NULL; |
| 1565 | object *newlocals, *newglobals; |
| 1566 | object *co, *v; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1567 | |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1568 | if (is_instancemethodobject(func)) { |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 1569 | int argcount; |
Guido van Rossum | e8122f1 | 1991-05-05 20:03:07 +0000 | [diff] [blame] | 1570 | object *self = instancemethodgetself(func); |
| 1571 | func = instancemethodgetfunc(func); |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 1572 | if (arg == NULL) |
| 1573 | argcount = 0; |
| 1574 | else if (is_tupleobject(arg)) |
| 1575 | argcount = gettuplesize(arg); |
| 1576 | else |
| 1577 | argcount = 1; |
| 1578 | newarg = newtupleobject(argcount + 1); |
| 1579 | if (newarg == NULL) |
| 1580 | return NULL; |
| 1581 | INCREF(self); |
| 1582 | settupleitem(newarg, 0, self); |
| 1583 | if (arg != NULL && !is_tupleobject(arg)) { |
| 1584 | INCREF(arg); |
| 1585 | settupleitem(newarg, 1, arg); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1586 | } |
| 1587 | else { |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 1588 | int i; |
| 1589 | object *v; |
| 1590 | for (i = 0; i < argcount; i++) { |
| 1591 | v = gettupleitem(arg, i); |
| 1592 | XINCREF(v); |
| 1593 | settupleitem(newarg, i+1, v); |
| 1594 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1595 | } |
Guido van Rossum | 9c7b861 | 1991-12-16 13:04:47 +0000 | [diff] [blame] | 1596 | arg = newarg; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1597 | } |
| 1598 | else { |
| 1599 | if (!is_funcobject(func)) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1600 | err_setstr(TypeError, "call of non-function"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1601 | return NULL; |
| 1602 | } |
| 1603 | } |
| 1604 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1605 | co = getfunccode(func); |
| 1606 | if (co == NULL) { |
| 1607 | XDECREF(newarg); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1608 | return NULL; |
| 1609 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1610 | if (!is_codeobject(co)) { |
| 1611 | fprintf(stderr, "XXX Bad code\n"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1612 | abort(); |
| 1613 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1614 | newlocals = newdictobject(); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1615 | if (newlocals == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1616 | XDECREF(newarg); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1617 | return NULL; |
| 1618 | } |
| 1619 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1620 | newglobals = getfuncglobals(func); |
| 1621 | INCREF(newglobals); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1622 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1623 | v = eval_code((codeobject *)co, newglobals, newlocals, arg); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1624 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1625 | DECREF(newlocals); |
| 1626 | DECREF(newglobals); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1627 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1628 | XDECREF(newarg); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1629 | |
| 1630 | return v; |
| 1631 | } |
| 1632 | |
| 1633 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1634 | apply_subscript(v, w) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1635 | object *v, *w; |
| 1636 | { |
| 1637 | typeobject *tp = v->ob_type; |
| 1638 | if (tp->tp_as_sequence == NULL && tp->tp_as_mapping == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1639 | err_setstr(TypeError, "unsubscriptable object"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1640 | return NULL; |
| 1641 | } |
| 1642 | if (tp->tp_as_sequence != NULL) { |
| 1643 | int i; |
| 1644 | if (!is_intobject(w)) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1645 | err_setstr(TypeError, "sequence subscript not int"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1646 | return NULL; |
| 1647 | } |
| 1648 | i = getintvalue(w); |
Guido van Rossum | 98256aa | 1991-12-24 13:25:19 +0000 | [diff] [blame] | 1649 | if (i < 0) |
| 1650 | i += (*tp->tp_as_sequence->sq_length)(v); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1651 | return (*tp->tp_as_sequence->sq_item)(v, i); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1652 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1653 | return (*tp->tp_as_mapping->mp_subscript)(v, w); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1654 | } |
| 1655 | |
| 1656 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1657 | loop_subscript(v, w) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1658 | object *v, *w; |
| 1659 | { |
| 1660 | sequence_methods *sq = v->ob_type->tp_as_sequence; |
| 1661 | int i, n; |
| 1662 | if (sq == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1663 | err_setstr(TypeError, "loop over non-sequence"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1664 | return NULL; |
| 1665 | } |
| 1666 | i = getintvalue(w); |
| 1667 | n = (*sq->sq_length)(v); |
| 1668 | if (i >= n) |
| 1669 | return NULL; /* End of loop */ |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1670 | return (*sq->sq_item)(v, i); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1671 | } |
| 1672 | |
| 1673 | static int |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1674 | slice_index(v, isize, pi) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1675 | object *v; |
| 1676 | int isize; |
| 1677 | int *pi; |
| 1678 | { |
| 1679 | if (v != NULL) { |
| 1680 | if (!is_intobject(v)) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1681 | err_setstr(TypeError, "slice index must be int"); |
| 1682 | return -1; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1683 | } |
| 1684 | *pi = getintvalue(v); |
| 1685 | if (*pi < 0) |
| 1686 | *pi += isize; |
| 1687 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1688 | return 0; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1689 | } |
| 1690 | |
| 1691 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1692 | apply_slice(u, v, w) /* return u[v:w] */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1693 | object *u, *v, *w; |
| 1694 | { |
| 1695 | typeobject *tp = u->ob_type; |
| 1696 | int ilow, ihigh, isize; |
| 1697 | if (tp->tp_as_sequence == NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1698 | err_setstr(TypeError, "only sequences can be sliced"); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1699 | return NULL; |
| 1700 | } |
| 1701 | ilow = 0; |
| 1702 | isize = ihigh = (*tp->tp_as_sequence->sq_length)(u); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1703 | if (slice_index(v, isize, &ilow) != 0) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1704 | return NULL; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1705 | if (slice_index(w, isize, &ihigh) != 0) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1706 | return NULL; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1707 | return (*tp->tp_as_sequence->sq_slice)(u, ilow, ihigh); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1708 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1709 | |
| 1710 | static int |
| 1711 | assign_subscript(w, key, v) /* w[key] = v */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1712 | object *w; |
| 1713 | object *key; |
| 1714 | object *v; |
| 1715 | { |
| 1716 | typeobject *tp = w->ob_type; |
| 1717 | sequence_methods *sq; |
| 1718 | mapping_methods *mp; |
| 1719 | int (*func)(); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1720 | if ((sq = tp->tp_as_sequence) != NULL && |
| 1721 | (func = sq->sq_ass_item) != NULL) { |
| 1722 | if (!is_intobject(key)) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1723 | err_setstr(TypeError, |
Guido van Rossum | 98256aa | 1991-12-24 13:25:19 +0000 | [diff] [blame] | 1724 | "sequence subscript must be integer (assign or del)"); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1725 | return -1; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1726 | } |
Guido van Rossum | 98256aa | 1991-12-24 13:25:19 +0000 | [diff] [blame] | 1727 | else { |
| 1728 | int i = getintvalue(key); |
| 1729 | if (i < 0) |
Guido van Rossum | 626dae7 | 1992-01-10 00:28:07 +0000 | [diff] [blame] | 1730 | i += (*sq->sq_length)(w); |
Guido van Rossum | 98256aa | 1991-12-24 13:25:19 +0000 | [diff] [blame] | 1731 | return (*func)(w, i, v); |
| 1732 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1733 | } |
| 1734 | else if ((mp = tp->tp_as_mapping) != NULL && |
| 1735 | (func = mp->mp_ass_subscript) != NULL) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1736 | return (*func)(w, key, v); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1737 | } |
| 1738 | else { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1739 | err_setstr(TypeError, |
| 1740 | "can't assign to this subscripted object"); |
| 1741 | return -1; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1742 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1743 | } |
| 1744 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1745 | static int |
| 1746 | assign_slice(u, v, w, x) /* u[v:w] = x */ |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1747 | object *u, *v, *w, *x; |
| 1748 | { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1749 | sequence_methods *sq = u->ob_type->tp_as_sequence; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1750 | int ilow, ihigh, isize; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1751 | if (sq == NULL) { |
| 1752 | err_setstr(TypeError, "assign to slice of non-sequence"); |
| 1753 | return -1; |
| 1754 | } |
| 1755 | if (sq == NULL || sq->sq_ass_slice == NULL) { |
| 1756 | err_setstr(TypeError, "unassignable slice"); |
| 1757 | return -1; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1758 | } |
| 1759 | ilow = 0; |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1760 | isize = ihigh = (*sq->sq_length)(u); |
| 1761 | if (slice_index(v, isize, &ilow) != 0) |
| 1762 | return -1; |
| 1763 | if (slice_index(w, isize, &ihigh) != 0) |
| 1764 | return -1; |
| 1765 | return (*sq->sq_ass_slice)(u, ilow, ihigh, x); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1766 | } |
| 1767 | |
| 1768 | static int |
| 1769 | cmp_exception(err, v) |
| 1770 | object *err, *v; |
| 1771 | { |
| 1772 | if (is_tupleobject(v)) { |
| 1773 | int i, n; |
| 1774 | n = gettuplesize(v); |
| 1775 | for (i = 0; i < n; i++) { |
Guido van Rossum | 32c6cdf | 1991-12-10 13:52:46 +0000 | [diff] [blame] | 1776 | /* Test recursively */ |
| 1777 | if (cmp_exception(err, gettupleitem(v, i))) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1778 | return 1; |
| 1779 | } |
| 1780 | return 0; |
| 1781 | } |
| 1782 | return err == v; |
| 1783 | } |
| 1784 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1785 | static int |
| 1786 | cmp_member(v, w) |
| 1787 | object *v, *w; |
| 1788 | { |
| 1789 | int i, n, cmp; |
| 1790 | object *x; |
| 1791 | sequence_methods *sq; |
| 1792 | /* Special case for char in string */ |
| 1793 | if (is_stringobject(w)) { |
| 1794 | register char *s, *end; |
| 1795 | register char c; |
| 1796 | if (!is_stringobject(v) || getstringsize(v) != 1) { |
| 1797 | err_setstr(TypeError, |
| 1798 | "string member test needs char left operand"); |
| 1799 | return -1; |
| 1800 | } |
| 1801 | c = getstringvalue(v)[0]; |
| 1802 | s = getstringvalue(w); |
| 1803 | end = s + getstringsize(w); |
| 1804 | while (s < end) { |
| 1805 | if (c == *s++) |
| 1806 | return 1; |
| 1807 | } |
| 1808 | return 0; |
| 1809 | } |
| 1810 | sq = w->ob_type->tp_as_sequence; |
| 1811 | if (sq == NULL) { |
| 1812 | err_setstr(TypeError, |
| 1813 | "'in' or 'not in' needs sequence right argument"); |
| 1814 | return -1; |
| 1815 | } |
| 1816 | n = (*sq->sq_length)(w); |
| 1817 | for (i = 0; i < n; i++) { |
| 1818 | x = (*sq->sq_item)(w, i); |
| 1819 | cmp = cmpobject(v, x); |
| 1820 | XDECREF(x); |
| 1821 | if (cmp == 0) |
| 1822 | return 1; |
| 1823 | } |
| 1824 | return 0; |
| 1825 | } |
| 1826 | |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1827 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1828 | cmp_outcome(op, v, w) |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1829 | enum cmp_op op; |
| 1830 | register object *v; |
| 1831 | register object *w; |
| 1832 | { |
| 1833 | register int cmp; |
| 1834 | register int res = 0; |
| 1835 | switch (op) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1836 | case IS: |
| 1837 | case IS_NOT: |
| 1838 | res = (v == w); |
| 1839 | if (op == IS_NOT) |
| 1840 | res = !res; |
| 1841 | break; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1842 | case IN: |
| 1843 | case NOT_IN: |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1844 | res = cmp_member(v, w); |
| 1845 | if (res < 0) |
| 1846 | return NULL; |
| 1847 | if (op == NOT_IN) |
| 1848 | res = !res; |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1849 | break; |
| 1850 | case EXC_MATCH: |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1851 | res = cmp_exception(v, w); |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1852 | break; |
| 1853 | default: |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1854 | cmp = cmpobject(v, w); |
| 1855 | switch (op) { |
| 1856 | case LT: res = cmp < 0; break; |
| 1857 | case LE: res = cmp <= 0; break; |
| 1858 | case EQ: res = cmp == 0; break; |
| 1859 | case NE: res = cmp != 0; break; |
| 1860 | case GT: res = cmp > 0; break; |
| 1861 | case GE: res = cmp >= 0; break; |
| 1862 | /* XXX no default? (res is initialized to 0 though) */ |
| 1863 | } |
Guido van Rossum | 10dc2e8 | 1990-11-18 17:27:39 +0000 | [diff] [blame] | 1864 | } |
| 1865 | v = res ? True : False; |
| 1866 | INCREF(v); |
| 1867 | return v; |
| 1868 | } |
| 1869 | |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1870 | static int |
| 1871 | import_from(locals, v, name) |
| 1872 | object *locals; |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1873 | object *v; |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 1874 | object *name; |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1875 | { |
| 1876 | object *w, *x; |
| 1877 | w = getmoduledict(v); |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 1878 | if (getstringvalue(name)[0] == '*') { |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1879 | int i; |
| 1880 | int n = getdictsize(w); |
| 1881 | for (i = 0; i < n; i++) { |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 1882 | name = getdict2key(w, i); |
| 1883 | if (name == NULL || getstringvalue(name)[0] == '_') |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1884 | continue; |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 1885 | x = dict2lookup(w, name); |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1886 | if (x == NULL) { |
| 1887 | /* XXX can't happen? */ |
Guido van Rossum | 98256aa | 1991-12-24 13:25:19 +0000 | [diff] [blame] | 1888 | err_setstr(SystemError, getstringvalue(name)); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1889 | return -1; |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1890 | } |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 1891 | if (dict2insert(locals, name, x) != 0) |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1892 | return -1; |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1893 | } |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1894 | return 0; |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1895 | } |
| 1896 | else { |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 1897 | x = dict2lookup(w, name); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1898 | if (x == NULL) { |
Guido van Rossum | 98256aa | 1991-12-24 13:25:19 +0000 | [diff] [blame] | 1899 | char buf[250]; |
| 1900 | sprintf(buf, "cannot import name %s", |
| 1901 | getstringvalue(name)); |
| 1902 | err_setstr(ImportError, buf); |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1903 | return -1; |
| 1904 | } |
| 1905 | else |
Guido van Rossum | df62e44 | 1991-08-16 08:56:04 +0000 | [diff] [blame] | 1906 | return dict2insert(locals, name, x); |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1907 | } |
| 1908 | } |
| 1909 | |
| 1910 | static object * |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1911 | build_class(v, w) |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1912 | object *v; /* None or tuple containing base classes */ |
| 1913 | object *w; /* dictionary */ |
| 1914 | { |
| 1915 | if (is_tupleobject(v)) { |
| 1916 | int i; |
| 1917 | for (i = gettuplesize(v); --i >= 0; ) { |
| 1918 | object *x = gettupleitem(v, i); |
| 1919 | if (!is_classobject(x)) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1920 | err_setstr(TypeError, |
| 1921 | "base is not a class object"); |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1922 | return NULL; |
| 1923 | } |
| 1924 | } |
| 1925 | } |
| 1926 | else { |
| 1927 | v = NULL; |
| 1928 | } |
| 1929 | if (!is_dictobject(w)) { |
Guido van Rossum | 3f5da24 | 1990-12-20 15:06:42 +0000 | [diff] [blame] | 1930 | err_setstr(SystemError, "build_class with non-dictionary"); |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1931 | return NULL; |
| 1932 | } |
Guido van Rossum | 7e3090c | 1991-10-20 20:26:16 +0000 | [diff] [blame] | 1933 | return newclassobject(v, w, (object *) NULL); |
Guido van Rossum | e9736fc | 1990-11-18 17:33:06 +0000 | [diff] [blame] | 1934 | } |