Guido van Rossum | 778983b | 1993-02-19 15:55:02 +0000 | [diff] [blame^] | 1 | /*********************************************************** |
| 2 | Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum, |
| 3 | Amsterdam, The 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 | |
| 25 | /* Array object implementation */ |
| 26 | |
| 27 | /* An array is a uniform list -- all items have the same type. |
| 28 | The item type is restricted to simple C types like int or float */ |
| 29 | |
| 30 | #include "allobjects.h" |
| 31 | #include "modsupport.h" |
| 32 | #include "ceval.h" |
| 33 | |
| 34 | #ifdef sun |
| 35 | #define NEED_MEMMOVE |
| 36 | #endif |
| 37 | |
| 38 | #ifdef NEED_MEMMOVE |
| 39 | extern char *memmove(); |
| 40 | #endif |
| 41 | |
| 42 | struct arrayobject; /* Forward */ |
| 43 | |
| 44 | struct arraydescr { |
| 45 | int typecode; |
| 46 | int itemsize; |
| 47 | object * (*getitem) FPROTO((struct arrayobject *, int)); |
| 48 | int (*setitem) FPROTO((struct arrayobject *, int, object *)); |
| 49 | }; |
| 50 | |
| 51 | typedef struct arrayobject { |
| 52 | OB_VARHEAD |
| 53 | char *ob_item; |
| 54 | struct arraydescr *ob_descr; |
| 55 | } arrayobject; |
| 56 | |
| 57 | extern typeobject Arraytype; |
| 58 | |
| 59 | #define is_arrayobject(op) ((op)->ob_type == &Arraytype) |
| 60 | |
| 61 | extern object *newarrayobject PROTO((int, struct arraydescr *)); |
| 62 | extern int getarraysize PROTO((object *)); |
| 63 | extern object *getarrayitem PROTO((object *, int)); |
| 64 | extern int setarrayitem PROTO((object *, int, object *)); |
| 65 | extern int insarrayitem PROTO((object *, int, object *)); |
| 66 | extern int addarrayitem PROTO((object *, object *)); |
| 67 | |
| 68 | static object * |
| 69 | c_getitem(ap, i) |
| 70 | arrayobject *ap; |
| 71 | int i; |
| 72 | { |
| 73 | return newsizedstringobject(&((char *)ap->ob_item)[i], 1); |
| 74 | } |
| 75 | |
| 76 | static int |
| 77 | c_setitem(ap, i, v) |
| 78 | arrayobject *ap; |
| 79 | int i; |
| 80 | object *v; |
| 81 | { |
| 82 | char x; |
| 83 | if (!getargs(v, "c;array item must be char", &x)) |
| 84 | return -1; |
| 85 | if (i >= 0) |
| 86 | ((char *)ap->ob_item)[i] = x; |
| 87 | return 0; |
| 88 | } |
| 89 | |
| 90 | static object * |
| 91 | b_getitem(ap, i) |
| 92 | arrayobject *ap; |
| 93 | int i; |
| 94 | { |
| 95 | long x = ((char *)ap->ob_item)[i]; |
| 96 | if (x >= 128) |
| 97 | x -= 256; |
| 98 | return newintobject(x); |
| 99 | } |
| 100 | |
| 101 | static int |
| 102 | b_setitem(ap, i, v) |
| 103 | arrayobject *ap; |
| 104 | int i; |
| 105 | object *v; |
| 106 | { |
| 107 | char x; |
| 108 | if (!getargs(v, "b;array item must be integer", &x)) |
| 109 | return -1; |
| 110 | if (i >= 0) |
| 111 | ((char *)ap->ob_item)[i] = x; |
| 112 | return 0; |
| 113 | } |
| 114 | |
| 115 | static object * |
| 116 | h_getitem(ap, i) |
| 117 | arrayobject *ap; |
| 118 | int i; |
| 119 | { |
| 120 | return newintobject((long) ((short *)ap->ob_item)[i]); |
| 121 | } |
| 122 | |
| 123 | static int |
| 124 | h_setitem(ap, i, v) |
| 125 | arrayobject *ap; |
| 126 | int i; |
| 127 | object *v; |
| 128 | { |
| 129 | short x; |
| 130 | if (!getargs(v, "h;array item must be integer", &x)) |
| 131 | return -1; |
| 132 | if (i >= 0) |
| 133 | ((short *)ap->ob_item)[i] = x; |
| 134 | return 0; |
| 135 | } |
| 136 | |
| 137 | static object * |
| 138 | l_getitem(ap, i) |
| 139 | arrayobject *ap; |
| 140 | int i; |
| 141 | { |
| 142 | return newintobject(((long *)ap->ob_item)[i]); |
| 143 | } |
| 144 | |
| 145 | static int |
| 146 | l_setitem(ap, i, v) |
| 147 | arrayobject *ap; |
| 148 | int i; |
| 149 | object *v; |
| 150 | { |
| 151 | long x; |
| 152 | if (!getargs(v, "l;array item must be integer", &x)) |
| 153 | return -1; |
| 154 | if (i >= 0) |
| 155 | ((long *)ap->ob_item)[i] = x; |
| 156 | return 0; |
| 157 | } |
| 158 | |
| 159 | static object * |
| 160 | f_getitem(ap, i) |
| 161 | arrayobject *ap; |
| 162 | int i; |
| 163 | { |
| 164 | return newfloatobject((double) ((float *)ap->ob_item)[i]); |
| 165 | } |
| 166 | |
| 167 | static int |
| 168 | f_setitem(ap, i, v) |
| 169 | arrayobject *ap; |
| 170 | int i; |
| 171 | object *v; |
| 172 | { |
| 173 | float x; |
| 174 | if (!getargs(v, "f;array item must be float", &x)) |
| 175 | return -1; |
| 176 | if (i >= 0) |
| 177 | ((float *)ap->ob_item)[i] = x; |
| 178 | return 0; |
| 179 | } |
| 180 | |
| 181 | static object * |
| 182 | d_getitem(ap, i) |
| 183 | arrayobject *ap; |
| 184 | int i; |
| 185 | { |
| 186 | return newfloatobject(((double *)ap->ob_item)[i]); |
| 187 | } |
| 188 | |
| 189 | static int |
| 190 | d_setitem(ap, i, v) |
| 191 | arrayobject *ap; |
| 192 | int i; |
| 193 | object *v; |
| 194 | { |
| 195 | double x; |
| 196 | if (!getargs(v, "d;array item must be float", &x)) |
| 197 | return -1; |
| 198 | if (i >= 0) |
| 199 | ((double *)ap->ob_item)[i] = x; |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | /* Description of types */ |
| 204 | struct arraydescr descriptors[] = { |
| 205 | {'c', sizeof(char), c_getitem, c_setitem}, |
| 206 | {'b', sizeof(char), b_getitem, b_setitem}, |
| 207 | {'h', sizeof(short), h_getitem, h_setitem}, |
| 208 | {'l', sizeof(long), l_getitem, l_setitem}, |
| 209 | {'f', sizeof(float), f_getitem, f_setitem}, |
| 210 | {'d', sizeof(double), d_getitem, d_setitem}, |
| 211 | {'\0', 0, 0, 0} /* Sentinel */ |
| 212 | }; |
| 213 | |
| 214 | |
| 215 | object * |
| 216 | newarrayobject(size, descr) |
| 217 | int size; |
| 218 | struct arraydescr *descr; |
| 219 | { |
| 220 | int i; |
| 221 | arrayobject *op; |
| 222 | MALLARG nbytes; |
| 223 | int itemsize; |
| 224 | if (size < 0) { |
| 225 | err_badcall(); |
| 226 | return NULL; |
| 227 | } |
| 228 | nbytes = size * descr->itemsize; |
| 229 | /* Check for overflow */ |
| 230 | if (nbytes / descr->itemsize != size) { |
| 231 | return err_nomem(); |
| 232 | } |
| 233 | op = (arrayobject *) malloc(sizeof(arrayobject)); |
| 234 | if (op == NULL) { |
| 235 | return err_nomem(); |
| 236 | } |
| 237 | if (size <= 0) { |
| 238 | op->ob_item = NULL; |
| 239 | } |
| 240 | else { |
| 241 | op->ob_item = malloc(nbytes); |
| 242 | if (op->ob_item == NULL) { |
| 243 | free((ANY *)op); |
| 244 | return err_nomem(); |
| 245 | } |
| 246 | } |
| 247 | NEWREF(op); |
| 248 | op->ob_type = &Arraytype; |
| 249 | op->ob_size = size; |
| 250 | op->ob_descr = descr; |
| 251 | return (object *) op; |
| 252 | } |
| 253 | |
| 254 | int |
| 255 | getarraysize(op) |
| 256 | object *op; |
| 257 | { |
| 258 | if (!is_arrayobject(op)) { |
| 259 | err_badcall(); |
| 260 | return -1; |
| 261 | } |
| 262 | return ((arrayobject *)op) -> ob_size; |
| 263 | } |
| 264 | |
| 265 | object * |
| 266 | getarrayitem(op, i) |
| 267 | object *op; |
| 268 | int i; |
| 269 | { |
| 270 | register arrayobject *ap; |
| 271 | if (!is_arrayobject(op)) { |
| 272 | err_badcall(); |
| 273 | return NULL; |
| 274 | } |
| 275 | ap = (arrayobject *)op; |
| 276 | if (i < 0 || i >= ap->ob_size) { |
| 277 | err_setstr(IndexError, "array index out of range"); |
| 278 | return NULL; |
| 279 | } |
| 280 | return (*ap->ob_descr->getitem)(ap, i); |
| 281 | } |
| 282 | |
| 283 | static int |
| 284 | ins1(self, where, v) |
| 285 | arrayobject *self; |
| 286 | int where; |
| 287 | object *v; |
| 288 | { |
| 289 | int i; |
| 290 | char *items; |
| 291 | if (v == NULL) { |
| 292 | err_badcall(); |
| 293 | return -1; |
| 294 | } |
| 295 | if ((*self->ob_descr->setitem)(self, -1, v) < 0) |
| 296 | return -1; |
| 297 | items = self->ob_item; |
| 298 | RESIZE(items, char, (self->ob_size+1) * self->ob_descr->itemsize); |
| 299 | if (items == NULL) { |
| 300 | err_nomem(); |
| 301 | return -1; |
| 302 | } |
| 303 | if (where < 0) |
| 304 | where = 0; |
| 305 | if (where > self->ob_size) |
| 306 | where = self->ob_size; |
| 307 | memmove(items + (where+1)*self->ob_descr->itemsize, |
| 308 | items + where*self->ob_descr->itemsize, |
| 309 | (self->ob_size-where)*self->ob_descr->itemsize); |
| 310 | self->ob_item = items; |
| 311 | self->ob_size++; |
| 312 | return (*self->ob_descr->setitem)(self, where, v); |
| 313 | } |
| 314 | |
| 315 | int |
| 316 | insarrayitem(op, where, newitem) |
| 317 | object *op; |
| 318 | int where; |
| 319 | object *newitem; |
| 320 | { |
| 321 | if (!is_arrayobject(op)) { |
| 322 | err_badcall(); |
| 323 | return -1; |
| 324 | } |
| 325 | return ins1((arrayobject *)op, where, newitem); |
| 326 | } |
| 327 | |
| 328 | int |
| 329 | addarrayitem(op, newitem) |
| 330 | object *op; |
| 331 | object *newitem; |
| 332 | { |
| 333 | if (!is_arrayobject(op)) { |
| 334 | err_badcall(); |
| 335 | return -1; |
| 336 | } |
| 337 | return ins1((arrayobject *)op, |
| 338 | (int) ((arrayobject *)op)->ob_size, newitem); |
| 339 | } |
| 340 | |
| 341 | /* Methods */ |
| 342 | |
| 343 | static void |
| 344 | array_dealloc(op) |
| 345 | arrayobject *op; |
| 346 | { |
| 347 | int i; |
| 348 | if (op->ob_item != NULL) |
| 349 | free((ANY *)op->ob_item); |
| 350 | free((ANY *)op); |
| 351 | } |
| 352 | |
| 353 | static int |
| 354 | array_compare(v, w) |
| 355 | arrayobject *v, *w; |
| 356 | { |
| 357 | int len = (v->ob_size < w->ob_size) ? v->ob_size : w->ob_size; |
| 358 | int i; |
| 359 | for (i = 0; i < len; i++) { |
| 360 | object *ai, *bi; |
| 361 | int cmp; |
| 362 | ai = getarrayitem((object *)v, i); |
| 363 | bi = getarrayitem((object *)w, i); |
| 364 | if (ai && bi) |
| 365 | cmp = cmpobject(ai, bi); |
| 366 | else |
| 367 | cmp = -1; |
| 368 | XDECREF(ai); |
| 369 | XDECREF(bi); |
| 370 | if (cmp != 0) { |
| 371 | err_clear(); /* XXX Can't report errors here */ |
| 372 | return cmp; |
| 373 | } |
| 374 | } |
| 375 | return v->ob_size - w->ob_size; |
| 376 | } |
| 377 | |
| 378 | static int |
| 379 | array_length(a) |
| 380 | arrayobject *a; |
| 381 | { |
| 382 | return a->ob_size; |
| 383 | } |
| 384 | |
| 385 | static object * |
| 386 | array_item(a, i) |
| 387 | arrayobject *a; |
| 388 | int i; |
| 389 | { |
| 390 | if (i < 0 || i >= a->ob_size) { |
| 391 | err_setstr(IndexError, "array index out of range"); |
| 392 | return NULL; |
| 393 | } |
| 394 | return getarrayitem((object *)a, i); |
| 395 | } |
| 396 | |
| 397 | static object * |
| 398 | array_slice(a, ilow, ihigh) |
| 399 | arrayobject *a; |
| 400 | int ilow, ihigh; |
| 401 | { |
| 402 | arrayobject *np; |
| 403 | int i; |
| 404 | if (ilow < 0) |
| 405 | ilow = 0; |
| 406 | else if (ilow > a->ob_size) |
| 407 | ilow = a->ob_size; |
| 408 | if (ihigh < 0) |
| 409 | ihigh = 0; |
| 410 | if (ihigh < ilow) |
| 411 | ihigh = ilow; |
| 412 | else if (ihigh > a->ob_size) |
| 413 | ihigh = a->ob_size; |
| 414 | np = (arrayobject *) newarrayobject(ihigh - ilow, a->ob_descr); |
| 415 | if (np == NULL) |
| 416 | return NULL; |
| 417 | memcpy(np->ob_item, a->ob_item + ilow * a->ob_descr->itemsize, |
| 418 | (ihigh-ilow) * a->ob_descr->itemsize); |
| 419 | return (object *)np; |
| 420 | } |
| 421 | |
| 422 | static object * |
| 423 | array_concat(a, bb) |
| 424 | arrayobject *a; |
| 425 | object *bb; |
| 426 | { |
| 427 | int size; |
| 428 | int i; |
| 429 | arrayobject *np; |
| 430 | if (!is_arrayobject(bb)) { |
| 431 | err_badarg(); |
| 432 | return NULL; |
| 433 | } |
| 434 | #define b ((arrayobject *)bb) |
| 435 | if (a->ob_descr != b->ob_descr) { |
| 436 | err_badarg(); |
| 437 | return NULL; |
| 438 | } |
| 439 | size = a->ob_size + b->ob_size; |
| 440 | np = (arrayobject *) newarrayobject(size, a->ob_descr); |
| 441 | if (np == NULL) { |
| 442 | return NULL; |
| 443 | } |
| 444 | memcpy(np->ob_item, a->ob_item, a->ob_size*a->ob_descr->itemsize); |
| 445 | memcpy(np->ob_item + a->ob_size*a->ob_descr->itemsize, |
| 446 | a->ob_item, a->ob_size*a->ob_descr->itemsize); |
| 447 | return (object *)np; |
| 448 | #undef b |
| 449 | } |
| 450 | |
| 451 | static object * |
| 452 | array_repeat(a, n) |
| 453 | arrayobject *a; |
| 454 | int n; |
| 455 | { |
| 456 | int i, j; |
| 457 | int size; |
| 458 | arrayobject *np; |
| 459 | char *p; |
| 460 | int nbytes; |
| 461 | if (n < 0) |
| 462 | n = 0; |
| 463 | size = a->ob_size * n; |
| 464 | np = (arrayobject *) newarrayobject(size, a->ob_descr); |
| 465 | if (np == NULL) |
| 466 | return NULL; |
| 467 | p = np->ob_item; |
| 468 | nbytes = a->ob_size * a->ob_descr->itemsize; |
| 469 | for (i = 0; i < n; i++) { |
| 470 | memcpy(p, a->ob_item, nbytes); |
| 471 | p += nbytes; |
| 472 | } |
| 473 | return (object *) np; |
| 474 | } |
| 475 | |
| 476 | static int |
| 477 | array_ass_slice(a, ilow, ihigh, v) |
| 478 | arrayobject *a; |
| 479 | int ilow, ihigh; |
| 480 | object *v; |
| 481 | { |
| 482 | char *item; |
| 483 | int n; /* Size of replacement array */ |
| 484 | int d; /* Change in size */ |
| 485 | int k; /* Loop index */ |
| 486 | #define b ((arrayobject *)v) |
| 487 | if (v == NULL) |
| 488 | n = 0; |
| 489 | else if (is_arrayobject(v)) { |
| 490 | n = b->ob_size; |
| 491 | if (a == b) { |
| 492 | /* Special case "a[i:j] = a" -- copy b first */ |
| 493 | int ret; |
| 494 | v = array_slice(b, 0, n); |
| 495 | ret = array_ass_slice(a, ilow, ihigh, v); |
| 496 | DECREF(v); |
| 497 | return ret; |
| 498 | } |
| 499 | if (b->ob_descr != a->ob_descr) { |
| 500 | err_badarg(); |
| 501 | return -1; |
| 502 | } |
| 503 | } |
| 504 | else { |
| 505 | err_badarg(); |
| 506 | return -1; |
| 507 | } |
| 508 | if (ilow < 0) |
| 509 | ilow = 0; |
| 510 | else if (ilow > a->ob_size) |
| 511 | ilow = a->ob_size; |
| 512 | if (ihigh < 0) |
| 513 | ihigh = 0; |
| 514 | if (ihigh < ilow) |
| 515 | ihigh = ilow; |
| 516 | else if (ihigh > a->ob_size) |
| 517 | ihigh = a->ob_size; |
| 518 | item = a->ob_item; |
| 519 | d = n - (ihigh-ilow); |
| 520 | if (d < 0) { /* Delete -d items */ |
| 521 | memmove(item + (ihigh+d)*a->ob_descr->itemsize, |
| 522 | item + ihigh*a->ob_descr->itemsize, |
| 523 | (a->ob_size-ihigh)*a->ob_descr->itemsize); |
| 524 | a->ob_size += d; |
| 525 | RESIZE(item, char, a->ob_size*a->ob_descr->itemsize); |
| 526 | /* Can't fail */ |
| 527 | a->ob_item = item; |
| 528 | } |
| 529 | else if (d > 0) { /* Insert d items */ |
| 530 | RESIZE(item, char, (a->ob_size + d)*a->ob_descr->itemsize); |
| 531 | if (item == NULL) { |
| 532 | err_nomem(); |
| 533 | return -1; |
| 534 | } |
| 535 | memmove(item + (ihigh+d)*a->ob_descr->itemsize, |
| 536 | item + ihigh*a->ob_descr->itemsize, |
| 537 | (a->ob_size-ihigh)*a->ob_descr->itemsize); |
| 538 | a->ob_item = item; |
| 539 | a->ob_size += d; |
| 540 | } |
| 541 | if (n > 0) |
| 542 | memcpy(item + ilow*a->ob_descr->itemsize, b->ob_item, |
| 543 | n*b->ob_descr->itemsize); |
| 544 | return 0; |
| 545 | #undef b |
| 546 | } |
| 547 | |
| 548 | static int |
| 549 | array_ass_item(a, i, v) |
| 550 | arrayobject *a; |
| 551 | int i; |
| 552 | object *v; |
| 553 | { |
| 554 | if (i < 0 || i >= a->ob_size) { |
| 555 | err_setstr(IndexError, "array assignment index out of range"); |
| 556 | return -1; |
| 557 | } |
| 558 | if (v == NULL) |
| 559 | return array_ass_slice(a, i, i+1, v); |
| 560 | return (*a->ob_descr->setitem)(a, i, v); |
| 561 | } |
| 562 | |
| 563 | static int |
| 564 | setarrayitem(a, i, v) |
| 565 | object *a; |
| 566 | int i; |
| 567 | object *v; |
| 568 | { |
| 569 | if (!is_arrayobject(a)) { |
| 570 | err_badcall(); |
| 571 | return -1; |
| 572 | } |
| 573 | return array_ass_item((arrayobject *)a, i, v); |
| 574 | } |
| 575 | |
| 576 | static object * |
| 577 | ins(self, where, v) |
| 578 | arrayobject *self; |
| 579 | int where; |
| 580 | object *v; |
| 581 | { |
| 582 | if (ins1(self, where, v) != 0) |
| 583 | return NULL; |
| 584 | INCREF(None); |
| 585 | return None; |
| 586 | } |
| 587 | |
| 588 | static object * |
| 589 | array_insert(self, args) |
| 590 | arrayobject *self; |
| 591 | object *args; |
| 592 | { |
| 593 | int i; |
| 594 | object *v; |
| 595 | if (!getargs(args, "(iO)", &i, &v)) |
| 596 | return NULL; |
| 597 | return ins(self, i, v); |
| 598 | } |
| 599 | |
| 600 | static object * |
| 601 | array_append(self, args) |
| 602 | arrayobject *self; |
| 603 | object *args; |
| 604 | { |
| 605 | object *v; |
| 606 | if (!getargs(args, "O", &v)) |
| 607 | return NULL; |
| 608 | return ins(self, (int) self->ob_size, v); |
| 609 | } |
| 610 | |
| 611 | static object * |
| 612 | array_byteswap(self, args) |
| 613 | arrayobject *self; |
| 614 | object *args; |
| 615 | { |
| 616 | char *p; |
| 617 | int i; |
| 618 | switch (self->ob_descr->itemsize) { |
| 619 | case 1: |
| 620 | break; |
| 621 | case 2: |
| 622 | for (p = self->ob_item, i = self->ob_size; --i >= 0; p += 2) { |
| 623 | char p0 = p[0]; |
| 624 | p[0] = p[1]; |
| 625 | p[1] = p0; |
| 626 | } |
| 627 | break; |
| 628 | case 4: |
| 629 | for (p = self->ob_item, i = self->ob_size; --i >= 0; p += 4) { |
| 630 | char p0 = p[0]; |
| 631 | char p1 = p[1]; |
| 632 | p[0] = p[3]; |
| 633 | p[1] = p[2]; |
| 634 | p[2] = p1; |
| 635 | p[3] = p0; |
| 636 | } |
| 637 | break; |
| 638 | default: |
| 639 | err_setstr(RuntimeError, |
| 640 | "don't know how to byteswap this array type"); |
| 641 | return NULL; |
| 642 | } |
| 643 | INCREF(None); |
| 644 | return None; |
| 645 | } |
| 646 | |
| 647 | #if 0 |
| 648 | static object * |
| 649 | array_reverse(self, args) |
| 650 | arrayobject *self; |
| 651 | object *args; |
| 652 | { |
| 653 | register object **p, **q; |
| 654 | register object *tmp; |
| 655 | |
| 656 | if (args != NULL) { |
| 657 | err_badarg(); |
| 658 | return NULL; |
| 659 | } |
| 660 | |
| 661 | if (self->ob_size > 1) { |
| 662 | for (p = self->ob_item, q = self->ob_item + self->ob_size - 1; |
| 663 | p < q; p++, q--) { |
| 664 | tmp = *p; |
| 665 | *p = *q; |
| 666 | *q = tmp; |
| 667 | } |
| 668 | } |
| 669 | |
| 670 | INCREF(None); |
| 671 | return None; |
| 672 | } |
| 673 | #endif |
| 674 | |
| 675 | #if 0 |
| 676 | static object * |
| 677 | array_index(self, args) |
| 678 | arrayobject *self; |
| 679 | object *args; |
| 680 | { |
| 681 | int i; |
| 682 | |
| 683 | if (args == NULL) { |
| 684 | err_badarg(); |
| 685 | return NULL; |
| 686 | } |
| 687 | for (i = 0; i < self->ob_size; i++) { |
| 688 | if (cmpobject(self->ob_item[i], args) == 0) |
| 689 | return newintobject((long)i); |
| 690 | } |
| 691 | err_setstr(ValueError, "array.index(x): x not in array"); |
| 692 | return NULL; |
| 693 | } |
| 694 | #endif |
| 695 | |
| 696 | #if 0 |
| 697 | static object * |
| 698 | array_count(self, args) |
| 699 | arrayobject *self; |
| 700 | object *args; |
| 701 | { |
| 702 | int count = 0; |
| 703 | int i; |
| 704 | |
| 705 | if (args == NULL) { |
| 706 | err_badarg(); |
| 707 | return NULL; |
| 708 | } |
| 709 | for (i = 0; i < self->ob_size; i++) { |
| 710 | if (cmpobject(self->ob_item[i], args) == 0) |
| 711 | count++; |
| 712 | } |
| 713 | return newintobject((long)count); |
| 714 | } |
| 715 | #endif |
| 716 | |
| 717 | #if 0 |
| 718 | static object * |
| 719 | array_remove(self, args) |
| 720 | arrayobject *self; |
| 721 | object *args; |
| 722 | { |
| 723 | int i; |
| 724 | |
| 725 | if (args == NULL) { |
| 726 | err_badarg(); |
| 727 | return NULL; |
| 728 | } |
| 729 | for (i = 0; i < self->ob_size; i++) { |
| 730 | if (cmpobject(self->ob_item[i], args) == 0) { |
| 731 | if (array_ass_slice(self, i, i+1, (object *)NULL) != 0) |
| 732 | return NULL; |
| 733 | INCREF(None); |
| 734 | return None; |
| 735 | } |
| 736 | |
| 737 | } |
| 738 | err_setstr(ValueError, "array.remove(x): x not in array"); |
| 739 | return NULL; |
| 740 | } |
| 741 | #endif |
| 742 | |
| 743 | static object * |
| 744 | array_read(self, args) |
| 745 | arrayobject *self; |
| 746 | object *args; |
| 747 | { |
| 748 | object *f; |
| 749 | int n; |
| 750 | FILE *fp; |
| 751 | if (!getargs(args, "(Oi)", &f, &n)) |
| 752 | return NULL; |
| 753 | fp = getfilefile(f); |
| 754 | if (fp == NULL) { |
| 755 | err_setstr(TypeError, "arg1 must be open file"); |
| 756 | return NULL; |
| 757 | } |
| 758 | if (n > 0) { |
| 759 | char *item = self->ob_item; |
| 760 | int itemsize = self->ob_descr->itemsize; |
| 761 | int nread; |
| 762 | RESIZE(item, char, (self->ob_size + n) * itemsize); |
| 763 | if (item == NULL) { |
| 764 | err_nomem(); |
| 765 | return NULL; |
| 766 | } |
| 767 | self->ob_item = item; |
| 768 | self->ob_size += n; |
| 769 | nread = fread(item + (self->ob_size - n) * itemsize, |
| 770 | itemsize, n, fp); |
| 771 | if (nread < n) { |
| 772 | self->ob_size -= (n - nread); |
| 773 | RESIZE(item, char, self->ob_size*itemsize); |
| 774 | self->ob_item = item; |
| 775 | err_setstr(EOFError, "not enough items in file"); |
| 776 | return NULL; |
| 777 | } |
| 778 | } |
| 779 | INCREF(None); |
| 780 | return None; |
| 781 | } |
| 782 | |
| 783 | static object * |
| 784 | array_write(self, args) |
| 785 | arrayobject *self; |
| 786 | object *args; |
| 787 | { |
| 788 | object *f; |
| 789 | FILE *fp; |
| 790 | if (!getargs(args, "O", &f)) |
| 791 | return NULL; |
| 792 | fp = getfilefile(f); |
| 793 | if (fp == NULL) { |
| 794 | err_setstr(TypeError, "arg must be open file"); |
| 795 | return NULL; |
| 796 | } |
| 797 | if (self->ob_size > 0) { |
| 798 | if (fwrite(self->ob_item, self->ob_descr->itemsize, |
| 799 | self->ob_size, fp) != self->ob_size) { |
| 800 | err_errno(IOError); |
| 801 | clearerr(fp); |
| 802 | return NULL; |
| 803 | } |
| 804 | } |
| 805 | INCREF(None); |
| 806 | return None; |
| 807 | } |
| 808 | |
| 809 | static object * |
| 810 | array_fromlist(self, args) |
| 811 | arrayobject *self; |
| 812 | object *args; |
| 813 | { |
| 814 | int n; |
| 815 | object *list; |
| 816 | int itemsize = self->ob_descr->itemsize; |
| 817 | if (!getargs(args, "O", &list)) |
| 818 | return NULL; |
| 819 | if (!is_listobject(list)) { |
| 820 | err_setstr(TypeError, "arg must be list"); |
| 821 | return NULL; |
| 822 | } |
| 823 | n = getlistsize(list); |
| 824 | if (n > 0) { |
| 825 | char *item = self->ob_item; |
| 826 | int i; |
| 827 | RESIZE(item, char, (self->ob_size + n) * itemsize); |
| 828 | if (item == NULL) { |
| 829 | err_nomem(); |
| 830 | return NULL; |
| 831 | } |
| 832 | self->ob_item = item; |
| 833 | self->ob_size += n; |
| 834 | for (i = 0; i < n; i++) { |
| 835 | object *v = getlistitem(list, i); |
| 836 | if ((*self->ob_descr->setitem)(self, |
| 837 | self->ob_size - n + i, v) != 0) { |
| 838 | self->ob_size -= n; |
| 839 | RESIZE(item, char, self->ob_size * itemsize); |
| 840 | self->ob_item = item; |
| 841 | return NULL; |
| 842 | } |
| 843 | } |
| 844 | } |
| 845 | INCREF(None); |
| 846 | return None; |
| 847 | } |
| 848 | |
| 849 | static object * |
| 850 | array_tolist(self, args) |
| 851 | arrayobject *self; |
| 852 | object *args; |
| 853 | { |
| 854 | object *list = newlistobject(self->ob_size); |
| 855 | int i; |
| 856 | if (list == NULL) |
| 857 | return NULL; |
| 858 | for (i = 0; i < self->ob_size; i++) { |
| 859 | object *v = getarrayitem((object *)self, i); |
| 860 | if (v == NULL) { |
| 861 | DECREF(list); |
| 862 | return NULL; |
| 863 | } |
| 864 | setlistitem(list, i, v); |
| 865 | } |
| 866 | return list; |
| 867 | } |
| 868 | |
| 869 | static object * |
| 870 | array_fromstring(self, args) |
| 871 | arrayobject *self; |
| 872 | object *args; |
| 873 | { |
| 874 | char *str; |
| 875 | int n; |
| 876 | int itemsize = self->ob_descr->itemsize; |
| 877 | if (!getargs(args, "s#", &str, &n)) |
| 878 | return NULL; |
| 879 | if (n % itemsize != 0) { |
| 880 | err_setstr(ValueError, |
| 881 | "string length not a multiple of item size"); |
| 882 | return NULL; |
| 883 | } |
| 884 | n = n / itemsize; |
| 885 | if (n > 0) { |
| 886 | char *item = self->ob_item; |
| 887 | RESIZE(item, char, (self->ob_size + n) * itemsize); |
| 888 | if (item == NULL) { |
| 889 | err_nomem(); |
| 890 | return NULL; |
| 891 | } |
| 892 | self->ob_item = item; |
| 893 | self->ob_size += n; |
| 894 | memcpy(item + (self->ob_size - n) * itemsize, str, itemsize*n); |
| 895 | } |
| 896 | INCREF(None); |
| 897 | return None; |
| 898 | } |
| 899 | |
| 900 | static object * |
| 901 | array_tostring(self, args) |
| 902 | arrayobject *self; |
| 903 | object *args; |
| 904 | { |
| 905 | if (!getargs(args, "")) |
| 906 | return NULL; |
| 907 | return newsizedstringobject(self->ob_item, |
| 908 | self->ob_size * self->ob_descr->itemsize); |
| 909 | } |
| 910 | |
| 911 | static struct methodlist array_methods[] = { |
| 912 | {"append", array_append}, |
| 913 | {"byteswap", array_byteswap}, |
| 914 | /* {"count", array_count},*/ |
| 915 | /* {"index", array_index},*/ |
| 916 | {"insert", array_insert}, |
| 917 | /* {"sort", array_sort},*/ |
| 918 | /* {"remove", array_remove},*/ |
| 919 | /* {"reverse", array_reverse},*/ |
| 920 | {"read", array_read}, |
| 921 | {"write", array_write}, |
| 922 | {"fromlist", array_fromlist}, |
| 923 | {"tolist", array_tolist}, |
| 924 | {"fromstring", array_fromstring}, |
| 925 | {"tostring", array_tostring}, |
| 926 | {NULL, NULL} /* sentinel */ |
| 927 | }; |
| 928 | |
| 929 | static object * |
| 930 | array_getattr(a, name) |
| 931 | arrayobject *a; |
| 932 | char *name; |
| 933 | { |
| 934 | if (strcmp(name, "typecode") == 0) { |
| 935 | char tc = a->ob_descr->typecode; |
| 936 | return newsizedstringobject(&tc, 1); |
| 937 | } |
| 938 | if (strcmp(name, "itemsize") == 0) { |
| 939 | return newintobject((long)a->ob_descr->itemsize); |
| 940 | } |
| 941 | return findmethod(array_methods, (object *)a, name); |
| 942 | } |
| 943 | |
| 944 | static int |
| 945 | array_print(a, fp, flags) |
| 946 | arrayobject *a; |
| 947 | FILE *fp; |
| 948 | int flags; |
| 949 | { |
| 950 | int ok = 0; |
| 951 | int i, len; |
| 952 | object *v; |
| 953 | len = a->ob_size; |
| 954 | if (len == 0) { |
| 955 | fprintf(fp, "array('%c')", a->ob_descr->typecode); |
| 956 | return ok; |
| 957 | } |
| 958 | if (a->ob_descr->typecode == 'c') { |
| 959 | fprintf(fp, "array('c', "); |
| 960 | v = array_tostring(a, (object *)NULL); |
| 961 | ok = printobject(v, fp, flags); |
| 962 | XDECREF(v); |
| 963 | fprintf(fp, ")"); |
| 964 | return ok; |
| 965 | } |
| 966 | fprintf(fp, "array('%c', [", a->ob_descr->typecode); |
| 967 | for (i = 0; i < len && ok == 0; i++) { |
| 968 | if (i > 0) |
| 969 | fprintf(fp, ", "); |
| 970 | v = (a->ob_descr->getitem)(a, i); |
| 971 | ok = printobject(v, fp, flags); |
| 972 | XDECREF(v); |
| 973 | } |
| 974 | fprintf(fp, "])"); |
| 975 | return ok; |
| 976 | } |
| 977 | |
| 978 | static object * |
| 979 | array_repr(a) |
| 980 | arrayobject *a; |
| 981 | { |
| 982 | char buf[256]; |
| 983 | object *s, *t, *comma, *v; |
| 984 | int i, len; |
| 985 | len = a->ob_size; |
| 986 | if (len == 0) { |
| 987 | sprintf(buf, "array('%c')", a->ob_descr->typecode); |
| 988 | return newstringobject(buf); |
| 989 | } |
| 990 | if (a->ob_descr->typecode == 'c') { |
| 991 | sprintf(buf, "array('c', "); |
| 992 | s = newstringobject(buf); |
| 993 | v = array_tostring(a, (object *)NULL); |
| 994 | t = reprobject(v); |
| 995 | XDECREF(v); |
| 996 | joinstring(&s, t); |
| 997 | XDECREF(t); |
| 998 | t = newstringobject(")"); |
| 999 | joinstring(&s, t); |
| 1000 | XDECREF(t); |
| 1001 | if (err_occurred()) { |
| 1002 | XDECREF(s); |
| 1003 | s = NULL; |
| 1004 | } |
| 1005 | return s; |
| 1006 | } |
| 1007 | sprintf(buf, "array('%c', [", a->ob_descr->typecode); |
| 1008 | s = newstringobject(buf); |
| 1009 | comma = newstringobject(", "); |
| 1010 | for (i = 0; i < len && !err_occurred(); i++) { |
| 1011 | v = (a->ob_descr->getitem)(a, i); |
| 1012 | t = reprobject(v); |
| 1013 | XDECREF(v); |
| 1014 | if (i > 0) |
| 1015 | joinstring(&s, comma); |
| 1016 | joinstring(&s, t); |
| 1017 | XDECREF(t); |
| 1018 | } |
| 1019 | XDECREF(comma); |
| 1020 | t = newstringobject("])"); |
| 1021 | joinstring(&s, t); |
| 1022 | XDECREF(t); |
| 1023 | if (err_occurred()) { |
| 1024 | XDECREF(s); |
| 1025 | s = NULL; |
| 1026 | } |
| 1027 | return s; |
| 1028 | } |
| 1029 | |
| 1030 | static sequence_methods array_as_sequence = { |
| 1031 | array_length, /*sq_length*/ |
| 1032 | array_concat, /*sq_concat*/ |
| 1033 | array_repeat, /*sq_repeat*/ |
| 1034 | array_item, /*sq_item*/ |
| 1035 | array_slice, /*sq_slice*/ |
| 1036 | array_ass_item, /*sq_ass_item*/ |
| 1037 | array_ass_slice, /*sq_ass_slice*/ |
| 1038 | }; |
| 1039 | |
| 1040 | typeobject Arraytype = { |
| 1041 | OB_HEAD_INIT(&Typetype) |
| 1042 | 0, |
| 1043 | "array", |
| 1044 | sizeof(arrayobject), |
| 1045 | 0, |
| 1046 | array_dealloc, /*tp_dealloc*/ |
| 1047 | array_print, /*tp_print*/ |
| 1048 | array_getattr, /*tp_getattr*/ |
| 1049 | 0, /*tp_setattr*/ |
| 1050 | array_compare, /*tp_compare*/ |
| 1051 | array_repr, /*tp_repr*/ |
| 1052 | 0, /*tp_as_number*/ |
| 1053 | &array_as_sequence, /*tp_as_sequence*/ |
| 1054 | 0, /*tp_as_mapping*/ |
| 1055 | }; |
| 1056 | |
| 1057 | |
| 1058 | static object * |
| 1059 | a_array(self, args) |
| 1060 | object *self; |
| 1061 | object *args; |
| 1062 | { |
| 1063 | char c; |
| 1064 | object *initial = NULL; |
| 1065 | struct arraydescr *descr; |
| 1066 | if (!getargs(args, "c", &c)) { |
| 1067 | err_clear(); |
| 1068 | if (!getargs(args, "(cO)", &c, &initial)) |
| 1069 | return NULL; |
| 1070 | if (!is_listobject(initial) && !is_stringobject(initial)) { |
| 1071 | err_setstr(TypeError, |
| 1072 | "array initializer must be list or string"); |
| 1073 | return NULL; |
| 1074 | } |
| 1075 | } |
| 1076 | for (descr = descriptors; descr->typecode != '\0'; descr++) { |
| 1077 | if (descr->typecode == c) { |
| 1078 | object *a; |
| 1079 | int len; |
| 1080 | if (initial == NULL || !is_listobject(initial)) |
| 1081 | len = 0; |
| 1082 | else |
| 1083 | len = getlistsize(initial); |
| 1084 | a = newarrayobject(len, descr); |
| 1085 | if (a == NULL) |
| 1086 | return NULL; |
| 1087 | if (len > 0) { |
| 1088 | int i; |
| 1089 | for (i = 0; i < len; i++) { |
| 1090 | object *v = getlistitem(initial, i); |
| 1091 | if (setarrayitem(a, i, v) != 0) { |
| 1092 | DECREF(a); |
| 1093 | return NULL; |
| 1094 | } |
| 1095 | } |
| 1096 | } |
| 1097 | if (initial != NULL && is_stringobject(initial)) { |
| 1098 | object *v = |
| 1099 | array_fromstring((arrayobject *)a, initial); |
| 1100 | if (v == NULL) { |
| 1101 | DECREF(a); |
| 1102 | return NULL; |
| 1103 | } |
| 1104 | DECREF(v); |
| 1105 | } |
| 1106 | return a; |
| 1107 | } |
| 1108 | } |
| 1109 | err_setstr(ValueError, "bad typecode (must be c, b, h, l, f or d)"); |
| 1110 | return NULL; |
| 1111 | } |
| 1112 | |
| 1113 | static struct methodlist a_methods[] = { |
| 1114 | {"array", a_array}, |
| 1115 | {NULL, NULL} /* sentinel */ |
| 1116 | }; |
| 1117 | |
| 1118 | void |
| 1119 | initarray() |
| 1120 | { |
| 1121 | initmodule("array", a_methods); |
| 1122 | } |
| 1123 | |
| 1124 | |
| 1125 | #ifdef NEED_MEMMOVE |
| 1126 | |
| 1127 | /* A perhaps slow but I hope correct implementation of memmove */ |
| 1128 | |
| 1129 | char *memmove(dst, src, n) |
| 1130 | char *dst; |
| 1131 | char *src; |
| 1132 | int n; |
| 1133 | { |
| 1134 | char *realdst = dst; |
| 1135 | if (n <= 0) |
| 1136 | return dst; |
| 1137 | if (src >= dst+n || dst >= src+n) |
| 1138 | return memcpy(dst, src, n); |
| 1139 | if (src > dst) { |
| 1140 | while (--n >= 0) |
| 1141 | *dst++ = *src++; |
| 1142 | } |
| 1143 | else if (src < dst) { |
| 1144 | src += n; |
| 1145 | dst += n; |
| 1146 | while (--n >= 0) |
| 1147 | *--dst = *--src; |
| 1148 | } |
| 1149 | return realdst; |
| 1150 | } |
| 1151 | |
| 1152 | #endif |