| 1 | /* pp_ctl.c |
| 2 | * |
| 3 | * Copyright (c) 1991-1997, Larry Wall |
| 4 | * |
| 5 | * You may distribute under the terms of either the GNU General Public |
| 6 | * License or the Artistic License, as specified in the README file. |
| 7 | * |
| 8 | */ |
| 9 | |
| 10 | /* |
| 11 | * Now far ahead the Road has gone, |
| 12 | * And I must follow, if I can, |
| 13 | * Pursuing it with eager feet, |
| 14 | * Until it joins some larger way |
| 15 | * Where many paths and errands meet. |
| 16 | * And whither then? I cannot say. |
| 17 | */ |
| 18 | |
| 19 | #include "EXTERN.h" |
| 20 | #include "perl.h" |
| 21 | |
| 22 | #ifndef WORD_ALIGN |
| 23 | #define WORD_ALIGN sizeof(U16) |
| 24 | #endif |
| 25 | |
| 26 | #define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o)) |
| 27 | |
| 28 | #ifdef PERL_OBJECT |
| 29 | #define CALLOP this->*op |
| 30 | #else |
| 31 | #define CALLOP *op |
| 32 | static OP *docatch _((OP *o)); |
| 33 | static OP *dofindlabel _((OP *o, char *label, OP **opstack, OP **oplimit)); |
| 34 | static void doparseform _((SV *sv)); |
| 35 | static I32 dopoptoeval _((I32 startingblock)); |
| 36 | static I32 dopoptolabel _((char *label)); |
| 37 | static I32 dopoptoloop _((I32 startingblock)); |
| 38 | static I32 dopoptosub _((I32 startingblock)); |
| 39 | static void save_lines _((AV *array, SV *sv)); |
| 40 | static I32 sortcv _((SV *a, SV *b)); |
| 41 | static void qsortsv _((SV **array, size_t num_elts, I32 (*fun)(SV *a, SV *b))); |
| 42 | static OP *doeval _((int gimme, OP** startop)); |
| 43 | #endif |
| 44 | |
| 45 | PP(pp_wantarray) |
| 46 | { |
| 47 | djSP; |
| 48 | I32 cxix; |
| 49 | EXTEND(SP, 1); |
| 50 | |
| 51 | cxix = dopoptosub(cxstack_ix); |
| 52 | if (cxix < 0) |
| 53 | RETPUSHUNDEF; |
| 54 | |
| 55 | switch (cxstack[cxix].blk_gimme) { |
| 56 | case G_ARRAY: |
| 57 | RETPUSHYES; |
| 58 | case G_SCALAR: |
| 59 | RETPUSHNO; |
| 60 | default: |
| 61 | RETPUSHUNDEF; |
| 62 | } |
| 63 | } |
| 64 | |
| 65 | PP(pp_regcmaybe) |
| 66 | { |
| 67 | return NORMAL; |
| 68 | } |
| 69 | |
| 70 | PP(pp_regcomp) { |
| 71 | djSP; |
| 72 | register PMOP *pm = (PMOP*)cLOGOP->op_other; |
| 73 | register char *t; |
| 74 | SV *tmpstr; |
| 75 | STRLEN len; |
| 76 | MAGIC *mg = Null(MAGIC*); |
| 77 | |
| 78 | tmpstr = POPs; |
| 79 | if(SvROK(tmpstr)) { |
| 80 | SV *sv = SvRV(tmpstr); |
| 81 | if(SvMAGICAL(sv)) |
| 82 | mg = mg_find(sv, 'r'); |
| 83 | } |
| 84 | if(mg) { |
| 85 | regexp *re = (regexp *)mg->mg_obj; |
| 86 | ReREFCNT_dec(pm->op_pmregexp); |
| 87 | pm->op_pmregexp = ReREFCNT_inc(re); |
| 88 | } |
| 89 | else { |
| 90 | t = SvPV(tmpstr, len); |
| 91 | |
| 92 | /* Check against the last compiled regexp. */ |
| 93 | if (!pm->op_pmregexp || !pm->op_pmregexp->precomp || |
| 94 | pm->op_pmregexp->prelen != len || |
| 95 | memNE(pm->op_pmregexp->precomp, t, len)) |
| 96 | { |
| 97 | if (pm->op_pmregexp) { |
| 98 | ReREFCNT_dec(pm->op_pmregexp); |
| 99 | pm->op_pmregexp = Null(REGEXP*); /* crucial if regcomp aborts */ |
| 100 | } |
| 101 | |
| 102 | pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */ |
| 103 | pm->op_pmregexp = pregcomp(t, t + len, pm); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | if (!pm->op_pmregexp->prelen && curpm) |
| 108 | pm = curpm; |
| 109 | else if (strEQ("\\s+", pm->op_pmregexp->precomp)) |
| 110 | pm->op_pmflags |= PMf_WHITE; |
| 111 | |
| 112 | if (pm->op_pmflags & PMf_KEEP) { |
| 113 | pm->op_private &= ~OPpRUNTIME; /* no point compiling again */ |
| 114 | cLOGOP->op_first->op_next = op->op_next; |
| 115 | } |
| 116 | RETURN; |
| 117 | } |
| 118 | |
| 119 | PP(pp_substcont) |
| 120 | { |
| 121 | djSP; |
| 122 | register PMOP *pm = (PMOP*) cLOGOP->op_other; |
| 123 | register PERL_CONTEXT *cx = &cxstack[cxstack_ix]; |
| 124 | register SV *dstr = cx->sb_dstr; |
| 125 | register char *s = cx->sb_s; |
| 126 | register char *m = cx->sb_m; |
| 127 | char *orig = cx->sb_orig; |
| 128 | register REGEXP *rx = cx->sb_rx; |
| 129 | |
| 130 | rxres_restore(&cx->sb_rxres, rx); |
| 131 | |
| 132 | if (cx->sb_iters++) { |
| 133 | if (cx->sb_iters > cx->sb_maxiters) |
| 134 | DIE("Substitution loop"); |
| 135 | |
| 136 | if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs)) |
| 137 | cx->sb_rxtainted |= 2; |
| 138 | sv_catsv(dstr, POPs); |
| 139 | |
| 140 | /* Are we done */ |
| 141 | if (cx->sb_once || !regexec_flags(rx, s, cx->sb_strend, orig, |
| 142 | s == m, Nullsv, NULL, |
| 143 | cx->sb_safebase ? 0 : REXEC_COPY_STR)) |
| 144 | { |
| 145 | SV *targ = cx->sb_targ; |
| 146 | sv_catpvn(dstr, s, cx->sb_strend - s); |
| 147 | |
| 148 | TAINT_IF(cx->sb_rxtainted || RX_MATCH_TAINTED(rx)); |
| 149 | cx->sb_rxtainted |= RX_MATCH_TAINTED(rx); |
| 150 | |
| 151 | (void)SvOOK_off(targ); |
| 152 | Safefree(SvPVX(targ)); |
| 153 | SvPVX(targ) = SvPVX(dstr); |
| 154 | SvCUR_set(targ, SvCUR(dstr)); |
| 155 | SvLEN_set(targ, SvLEN(dstr)); |
| 156 | SvPVX(dstr) = 0; |
| 157 | sv_free(dstr); |
| 158 | |
| 159 | TAINT_IF(cx->sb_rxtainted & 1); |
| 160 | PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1))); |
| 161 | |
| 162 | (void)SvPOK_only(targ); |
| 163 | TAINT_IF(cx->sb_rxtainted); |
| 164 | SvSETMAGIC(targ); |
| 165 | SvTAINT(targ); |
| 166 | |
| 167 | LEAVE_SCOPE(cx->sb_oldsave); |
| 168 | POPSUBST(cx); |
| 169 | RETURNOP(pm->op_next); |
| 170 | } |
| 171 | } |
| 172 | if (rx->subbase && rx->subbase != orig) { |
| 173 | m = s; |
| 174 | s = orig; |
| 175 | cx->sb_orig = orig = rx->subbase; |
| 176 | s = orig + (m - s); |
| 177 | cx->sb_strend = s + (cx->sb_strend - m); |
| 178 | } |
| 179 | cx->sb_m = m = rx->startp[0]; |
| 180 | sv_catpvn(dstr, s, m-s); |
| 181 | cx->sb_s = rx->endp[0]; |
| 182 | cx->sb_rxtainted |= RX_MATCH_TAINTED(rx); |
| 183 | rxres_save(&cx->sb_rxres, rx); |
| 184 | RETURNOP(pm->op_pmreplstart); |
| 185 | } |
| 186 | |
| 187 | void |
| 188 | rxres_save(void **rsp, REGEXP *rx) |
| 189 | { |
| 190 | UV *p = (UV*)*rsp; |
| 191 | U32 i; |
| 192 | |
| 193 | if (!p || p[1] < rx->nparens) { |
| 194 | i = 6 + rx->nparens * 2; |
| 195 | if (!p) |
| 196 | New(501, p, i, UV); |
| 197 | else |
| 198 | Renew(p, i, UV); |
| 199 | *rsp = (void*)p; |
| 200 | } |
| 201 | |
| 202 | *p++ = (UV)rx->subbase; |
| 203 | rx->subbase = Nullch; |
| 204 | |
| 205 | *p++ = rx->nparens; |
| 206 | |
| 207 | *p++ = (UV)rx->subbeg; |
| 208 | *p++ = (UV)rx->subend; |
| 209 | for (i = 0; i <= rx->nparens; ++i) { |
| 210 | *p++ = (UV)rx->startp[i]; |
| 211 | *p++ = (UV)rx->endp[i]; |
| 212 | } |
| 213 | } |
| 214 | |
| 215 | void |
| 216 | rxres_restore(void **rsp, REGEXP *rx) |
| 217 | { |
| 218 | UV *p = (UV*)*rsp; |
| 219 | U32 i; |
| 220 | |
| 221 | Safefree(rx->subbase); |
| 222 | rx->subbase = (char*)(*p); |
| 223 | *p++ = 0; |
| 224 | |
| 225 | rx->nparens = *p++; |
| 226 | |
| 227 | rx->subbeg = (char*)(*p++); |
| 228 | rx->subend = (char*)(*p++); |
| 229 | for (i = 0; i <= rx->nparens; ++i) { |
| 230 | rx->startp[i] = (char*)(*p++); |
| 231 | rx->endp[i] = (char*)(*p++); |
| 232 | } |
| 233 | } |
| 234 | |
| 235 | void |
| 236 | rxres_free(void **rsp) |
| 237 | { |
| 238 | UV *p = (UV*)*rsp; |
| 239 | |
| 240 | if (p) { |
| 241 | Safefree((char*)(*p)); |
| 242 | Safefree(p); |
| 243 | *rsp = Null(void*); |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | PP(pp_formline) |
| 248 | { |
| 249 | djSP; dMARK; dORIGMARK; |
| 250 | register SV *tmpForm = *++MARK; |
| 251 | register U16 *fpc; |
| 252 | register char *t; |
| 253 | register char *f; |
| 254 | register char *s; |
| 255 | register char *send; |
| 256 | register I32 arg; |
| 257 | register SV *sv; |
| 258 | char *item; |
| 259 | I32 itemsize; |
| 260 | I32 fieldsize; |
| 261 | I32 lines = 0; |
| 262 | bool chopspace = (strchr(chopset, ' ') != Nullch); |
| 263 | char *chophere; |
| 264 | char *linemark; |
| 265 | double value; |
| 266 | bool gotsome; |
| 267 | STRLEN len; |
| 268 | |
| 269 | if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) { |
| 270 | SvREADONLY_off(tmpForm); |
| 271 | doparseform(tmpForm); |
| 272 | } |
| 273 | |
| 274 | SvPV_force(formtarget, len); |
| 275 | t = SvGROW(formtarget, len + SvCUR(tmpForm) + 1); /* XXX SvCUR bad */ |
| 276 | t += len; |
| 277 | f = SvPV(tmpForm, len); |
| 278 | /* need to jump to the next word */ |
| 279 | s = f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN; |
| 280 | |
| 281 | fpc = (U16*)s; |
| 282 | |
| 283 | for (;;) { |
| 284 | DEBUG_f( { |
| 285 | char *name = "???"; |
| 286 | arg = -1; |
| 287 | switch (*fpc) { |
| 288 | case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break; |
| 289 | case FF_BLANK: arg = fpc[1]; name = "BLANK"; break; |
| 290 | case FF_SKIP: arg = fpc[1]; name = "SKIP"; break; |
| 291 | case FF_FETCH: arg = fpc[1]; name = "FETCH"; break; |
| 292 | case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break; |
| 293 | |
| 294 | case FF_CHECKNL: name = "CHECKNL"; break; |
| 295 | case FF_CHECKCHOP: name = "CHECKCHOP"; break; |
| 296 | case FF_SPACE: name = "SPACE"; break; |
| 297 | case FF_HALFSPACE: name = "HALFSPACE"; break; |
| 298 | case FF_ITEM: name = "ITEM"; break; |
| 299 | case FF_CHOP: name = "CHOP"; break; |
| 300 | case FF_LINEGLOB: name = "LINEGLOB"; break; |
| 301 | case FF_NEWLINE: name = "NEWLINE"; break; |
| 302 | case FF_MORE: name = "MORE"; break; |
| 303 | case FF_LINEMARK: name = "LINEMARK"; break; |
| 304 | case FF_END: name = "END"; break; |
| 305 | } |
| 306 | if (arg >= 0) |
| 307 | PerlIO_printf(PerlIO_stderr(), "%-16s%ld\n", name, (long) arg); |
| 308 | else |
| 309 | PerlIO_printf(PerlIO_stderr(), "%-16s\n", name); |
| 310 | } ) |
| 311 | switch (*fpc++) { |
| 312 | case FF_LINEMARK: |
| 313 | linemark = t; |
| 314 | lines++; |
| 315 | gotsome = FALSE; |
| 316 | break; |
| 317 | |
| 318 | case FF_LITERAL: |
| 319 | arg = *fpc++; |
| 320 | while (arg--) |
| 321 | *t++ = *f++; |
| 322 | break; |
| 323 | |
| 324 | case FF_SKIP: |
| 325 | f += *fpc++; |
| 326 | break; |
| 327 | |
| 328 | case FF_FETCH: |
| 329 | arg = *fpc++; |
| 330 | f += arg; |
| 331 | fieldsize = arg; |
| 332 | |
| 333 | if (MARK < SP) |
| 334 | sv = *++MARK; |
| 335 | else { |
| 336 | sv = &sv_no; |
| 337 | if (dowarn) |
| 338 | warn("Not enough format arguments"); |
| 339 | } |
| 340 | break; |
| 341 | |
| 342 | case FF_CHECKNL: |
| 343 | item = s = SvPV(sv, len); |
| 344 | itemsize = len; |
| 345 | if (itemsize > fieldsize) |
| 346 | itemsize = fieldsize; |
| 347 | send = chophere = s + itemsize; |
| 348 | while (s < send) { |
| 349 | if (*s & ~31) |
| 350 | gotsome = TRUE; |
| 351 | else if (*s == '\n') |
| 352 | break; |
| 353 | s++; |
| 354 | } |
| 355 | itemsize = s - item; |
| 356 | break; |
| 357 | |
| 358 | case FF_CHECKCHOP: |
| 359 | item = s = SvPV(sv, len); |
| 360 | itemsize = len; |
| 361 | if (itemsize <= fieldsize) { |
| 362 | send = chophere = s + itemsize; |
| 363 | while (s < send) { |
| 364 | if (*s == '\r') { |
| 365 | itemsize = s - item; |
| 366 | break; |
| 367 | } |
| 368 | if (*s++ & ~31) |
| 369 | gotsome = TRUE; |
| 370 | } |
| 371 | } |
| 372 | else { |
| 373 | itemsize = fieldsize; |
| 374 | send = chophere = s + itemsize; |
| 375 | while (s < send || (s == send && isSPACE(*s))) { |
| 376 | if (isSPACE(*s)) { |
| 377 | if (chopspace) |
| 378 | chophere = s; |
| 379 | if (*s == '\r') |
| 380 | break; |
| 381 | } |
| 382 | else { |
| 383 | if (*s & ~31) |
| 384 | gotsome = TRUE; |
| 385 | if (strchr(chopset, *s)) |
| 386 | chophere = s + 1; |
| 387 | } |
| 388 | s++; |
| 389 | } |
| 390 | itemsize = chophere - item; |
| 391 | } |
| 392 | break; |
| 393 | |
| 394 | case FF_SPACE: |
| 395 | arg = fieldsize - itemsize; |
| 396 | if (arg) { |
| 397 | fieldsize -= arg; |
| 398 | while (arg-- > 0) |
| 399 | *t++ = ' '; |
| 400 | } |
| 401 | break; |
| 402 | |
| 403 | case FF_HALFSPACE: |
| 404 | arg = fieldsize - itemsize; |
| 405 | if (arg) { |
| 406 | arg /= 2; |
| 407 | fieldsize -= arg; |
| 408 | while (arg-- > 0) |
| 409 | *t++ = ' '; |
| 410 | } |
| 411 | break; |
| 412 | |
| 413 | case FF_ITEM: |
| 414 | arg = itemsize; |
| 415 | s = item; |
| 416 | while (arg--) { |
| 417 | #if 'z' - 'a' != 25 |
| 418 | int ch = *t++ = *s++; |
| 419 | if (!iscntrl(ch)) |
| 420 | t[-1] = ' '; |
| 421 | #else |
| 422 | if ( !((*t++ = *s++) & ~31) ) |
| 423 | t[-1] = ' '; |
| 424 | #endif |
| 425 | |
| 426 | } |
| 427 | break; |
| 428 | |
| 429 | case FF_CHOP: |
| 430 | s = chophere; |
| 431 | if (chopspace) { |
| 432 | while (*s && isSPACE(*s)) |
| 433 | s++; |
| 434 | } |
| 435 | sv_chop(sv,s); |
| 436 | break; |
| 437 | |
| 438 | case FF_LINEGLOB: |
| 439 | item = s = SvPV(sv, len); |
| 440 | itemsize = len; |
| 441 | if (itemsize) { |
| 442 | gotsome = TRUE; |
| 443 | send = s + itemsize; |
| 444 | while (s < send) { |
| 445 | if (*s++ == '\n') { |
| 446 | if (s == send) |
| 447 | itemsize--; |
| 448 | else |
| 449 | lines++; |
| 450 | } |
| 451 | } |
| 452 | SvCUR_set(formtarget, t - SvPVX(formtarget)); |
| 453 | sv_catpvn(formtarget, item, itemsize); |
| 454 | SvGROW(formtarget, SvCUR(formtarget) + SvCUR(tmpForm) + 1); |
| 455 | t = SvPVX(formtarget) + SvCUR(formtarget); |
| 456 | } |
| 457 | break; |
| 458 | |
| 459 | case FF_DECIMAL: |
| 460 | /* If the field is marked with ^ and the value is undefined, |
| 461 | blank it out. */ |
| 462 | arg = *fpc++; |
| 463 | if ((arg & 512) && !SvOK(sv)) { |
| 464 | arg = fieldsize; |
| 465 | while (arg--) |
| 466 | *t++ = ' '; |
| 467 | break; |
| 468 | } |
| 469 | gotsome = TRUE; |
| 470 | value = SvNV(sv); |
| 471 | /* Formats aren't yet marked for locales, so assume "yes". */ |
| 472 | SET_NUMERIC_LOCAL(); |
| 473 | if (arg & 256) { |
| 474 | sprintf(t, "%#*.*f", (int) fieldsize, (int) arg & 255, value); |
| 475 | } else { |
| 476 | sprintf(t, "%*.0f", (int) fieldsize, value); |
| 477 | } |
| 478 | t += fieldsize; |
| 479 | break; |
| 480 | |
| 481 | case FF_NEWLINE: |
| 482 | f++; |
| 483 | while (t-- > linemark && *t == ' ') ; |
| 484 | t++; |
| 485 | *t++ = '\n'; |
| 486 | break; |
| 487 | |
| 488 | case FF_BLANK: |
| 489 | arg = *fpc++; |
| 490 | if (gotsome) { |
| 491 | if (arg) { /* repeat until fields exhausted? */ |
| 492 | *t = '\0'; |
| 493 | SvCUR_set(formtarget, t - SvPVX(formtarget)); |
| 494 | lines += FmLINES(formtarget); |
| 495 | if (lines == 200) { |
| 496 | arg = t - linemark; |
| 497 | if (strnEQ(linemark, linemark - arg, arg)) |
| 498 | DIE("Runaway format"); |
| 499 | } |
| 500 | FmLINES(formtarget) = lines; |
| 501 | SP = ORIGMARK; |
| 502 | RETURNOP(cLISTOP->op_first); |
| 503 | } |
| 504 | } |
| 505 | else { |
| 506 | t = linemark; |
| 507 | lines--; |
| 508 | } |
| 509 | break; |
| 510 | |
| 511 | case FF_MORE: |
| 512 | if (itemsize) { |
| 513 | arg = fieldsize - itemsize; |
| 514 | if (arg) { |
| 515 | fieldsize -= arg; |
| 516 | while (arg-- > 0) |
| 517 | *t++ = ' '; |
| 518 | } |
| 519 | s = t - 3; |
| 520 | if (strnEQ(s," ",3)) { |
| 521 | while (s > SvPVX(formtarget) && isSPACE(s[-1])) |
| 522 | s--; |
| 523 | } |
| 524 | *s++ = '.'; |
| 525 | *s++ = '.'; |
| 526 | *s++ = '.'; |
| 527 | } |
| 528 | break; |
| 529 | |
| 530 | case FF_END: |
| 531 | *t = '\0'; |
| 532 | SvCUR_set(formtarget, t - SvPVX(formtarget)); |
| 533 | FmLINES(formtarget) += lines; |
| 534 | SP = ORIGMARK; |
| 535 | RETPUSHYES; |
| 536 | } |
| 537 | } |
| 538 | } |
| 539 | |
| 540 | PP(pp_grepstart) |
| 541 | { |
| 542 | djSP; |
| 543 | SV *src; |
| 544 | |
| 545 | if (stack_base + *markstack_ptr == SP) { |
| 546 | (void)POPMARK; |
| 547 | if (GIMME_V == G_SCALAR) |
| 548 | XPUSHs(&sv_no); |
| 549 | RETURNOP(op->op_next->op_next); |
| 550 | } |
| 551 | stack_sp = stack_base + *markstack_ptr + 1; |
| 552 | pp_pushmark(ARGS); /* push dst */ |
| 553 | pp_pushmark(ARGS); /* push src */ |
| 554 | ENTER; /* enter outer scope */ |
| 555 | |
| 556 | SAVETMPS; |
| 557 | #ifdef USE_THREADS |
| 558 | /* SAVE_DEFSV does *not* suffice here */ |
| 559 | save_sptr(&THREADSV(0)); |
| 560 | #else |
| 561 | SAVESPTR(GvSV(defgv)); |
| 562 | #endif /* USE_THREADS */ |
| 563 | ENTER; /* enter inner scope */ |
| 564 | SAVESPTR(curpm); |
| 565 | |
| 566 | src = stack_base[*markstack_ptr]; |
| 567 | SvTEMP_off(src); |
| 568 | DEFSV = src; |
| 569 | |
| 570 | PUTBACK; |
| 571 | if (op->op_type == OP_MAPSTART) |
| 572 | pp_pushmark(ARGS); /* push top */ |
| 573 | return ((LOGOP*)op->op_next)->op_other; |
| 574 | } |
| 575 | |
| 576 | PP(pp_mapstart) |
| 577 | { |
| 578 | DIE("panic: mapstart"); /* uses grepstart */ |
| 579 | } |
| 580 | |
| 581 | PP(pp_mapwhile) |
| 582 | { |
| 583 | djSP; |
| 584 | I32 diff = (SP - stack_base) - *markstack_ptr; |
| 585 | I32 count; |
| 586 | I32 shift; |
| 587 | SV** src; |
| 588 | SV** dst; |
| 589 | |
| 590 | ++markstack_ptr[-1]; |
| 591 | if (diff) { |
| 592 | if (diff > markstack_ptr[-1] - markstack_ptr[-2]) { |
| 593 | shift = diff - (markstack_ptr[-1] - markstack_ptr[-2]); |
| 594 | count = (SP - stack_base) - markstack_ptr[-1] + 2; |
| 595 | |
| 596 | EXTEND(SP,shift); |
| 597 | src = SP; |
| 598 | dst = (SP += shift); |
| 599 | markstack_ptr[-1] += shift; |
| 600 | *markstack_ptr += shift; |
| 601 | while (--count) |
| 602 | *dst-- = *src--; |
| 603 | } |
| 604 | dst = stack_base + (markstack_ptr[-2] += diff) - 1; |
| 605 | ++diff; |
| 606 | while (--diff) |
| 607 | *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs); |
| 608 | } |
| 609 | LEAVE; /* exit inner scope */ |
| 610 | |
| 611 | /* All done yet? */ |
| 612 | if (markstack_ptr[-1] > *markstack_ptr) { |
| 613 | I32 items; |
| 614 | I32 gimme = GIMME_V; |
| 615 | |
| 616 | (void)POPMARK; /* pop top */ |
| 617 | LEAVE; /* exit outer scope */ |
| 618 | (void)POPMARK; /* pop src */ |
| 619 | items = --*markstack_ptr - markstack_ptr[-1]; |
| 620 | (void)POPMARK; /* pop dst */ |
| 621 | SP = stack_base + POPMARK; /* pop original mark */ |
| 622 | if (gimme == G_SCALAR) { |
| 623 | dTARGET; |
| 624 | XPUSHi(items); |
| 625 | } |
| 626 | else if (gimme == G_ARRAY) |
| 627 | SP += items; |
| 628 | RETURN; |
| 629 | } |
| 630 | else { |
| 631 | SV *src; |
| 632 | |
| 633 | ENTER; /* enter inner scope */ |
| 634 | SAVESPTR(curpm); |
| 635 | |
| 636 | src = stack_base[markstack_ptr[-1]]; |
| 637 | SvTEMP_off(src); |
| 638 | DEFSV = src; |
| 639 | |
| 640 | RETURNOP(cLOGOP->op_other); |
| 641 | } |
| 642 | } |
| 643 | |
| 644 | PP(pp_sort) |
| 645 | { |
| 646 | djSP; dMARK; dORIGMARK; |
| 647 | register SV **up; |
| 648 | SV **myorigmark = ORIGMARK; |
| 649 | register I32 max; |
| 650 | HV *stash; |
| 651 | GV *gv; |
| 652 | CV *cv; |
| 653 | I32 gimme = GIMME; |
| 654 | OP* nextop = op->op_next; |
| 655 | |
| 656 | if (gimme != G_ARRAY) { |
| 657 | SP = MARK; |
| 658 | RETPUSHUNDEF; |
| 659 | } |
| 660 | |
| 661 | ENTER; |
| 662 | SAVEPPTR(sortcop); |
| 663 | if (op->op_flags & OPf_STACKED) { |
| 664 | if (op->op_flags & OPf_SPECIAL) { |
| 665 | OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */ |
| 666 | kid = kUNOP->op_first; /* pass rv2gv */ |
| 667 | kid = kUNOP->op_first; /* pass leave */ |
| 668 | sortcop = kid->op_next; |
| 669 | stash = curcop->cop_stash; |
| 670 | } |
| 671 | else { |
| 672 | cv = sv_2cv(*++MARK, &stash, &gv, 0); |
| 673 | if (!(cv && CvROOT(cv))) { |
| 674 | if (gv) { |
| 675 | SV *tmpstr = sv_newmortal(); |
| 676 | gv_efullname3(tmpstr, gv, Nullch); |
| 677 | if (cv && CvXSUB(cv)) |
| 678 | DIE("Xsub \"%s\" called in sort", SvPVX(tmpstr)); |
| 679 | DIE("Undefined sort subroutine \"%s\" called", |
| 680 | SvPVX(tmpstr)); |
| 681 | } |
| 682 | if (cv) { |
| 683 | if (CvXSUB(cv)) |
| 684 | DIE("Xsub called in sort"); |
| 685 | DIE("Undefined subroutine in sort"); |
| 686 | } |
| 687 | DIE("Not a CODE reference in sort"); |
| 688 | } |
| 689 | sortcop = CvSTART(cv); |
| 690 | SAVESPTR(CvROOT(cv)->op_ppaddr); |
| 691 | CvROOT(cv)->op_ppaddr = ppaddr[OP_NULL]; |
| 692 | |
| 693 | SAVESPTR(curpad); |
| 694 | curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]); |
| 695 | } |
| 696 | } |
| 697 | else { |
| 698 | sortcop = Nullop; |
| 699 | stash = curcop->cop_stash; |
| 700 | } |
| 701 | |
| 702 | up = myorigmark + 1; |
| 703 | while (MARK < SP) { /* This may or may not shift down one here. */ |
| 704 | /*SUPPRESS 560*/ |
| 705 | if (*up = *++MARK) { /* Weed out nulls. */ |
| 706 | SvTEMP_off(*up); |
| 707 | if (!sortcop && !SvPOK(*up)) |
| 708 | (void)sv_2pv(*up, &na); |
| 709 | up++; |
| 710 | } |
| 711 | } |
| 712 | max = --up - myorigmark; |
| 713 | if (sortcop) { |
| 714 | if (max > 1) { |
| 715 | PERL_CONTEXT *cx; |
| 716 | SV** newsp; |
| 717 | bool oldcatch = CATCH_GET; |
| 718 | |
| 719 | SAVETMPS; |
| 720 | SAVEOP(); |
| 721 | |
| 722 | CATCH_SET(TRUE); |
| 723 | PUSHSTACK(SI_SORT); |
| 724 | if (sortstash != stash) { |
| 725 | firstgv = gv_fetchpv("a", TRUE, SVt_PV); |
| 726 | secondgv = gv_fetchpv("b", TRUE, SVt_PV); |
| 727 | sortstash = stash; |
| 728 | } |
| 729 | |
| 730 | SAVESPTR(GvSV(firstgv)); |
| 731 | SAVESPTR(GvSV(secondgv)); |
| 732 | |
| 733 | PUSHBLOCK(cx, CXt_NULL, stack_base); |
| 734 | if (!(op->op_flags & OPf_SPECIAL)) { |
| 735 | bool hasargs = FALSE; |
| 736 | cx->cx_type = CXt_SUB; |
| 737 | cx->blk_gimme = G_SCALAR; |
| 738 | PUSHSUB(cx); |
| 739 | if (!CvDEPTH(cv)) |
| 740 | (void)SvREFCNT_inc(cv); /* in preparation for POPSUB */ |
| 741 | } |
| 742 | sortcxix = cxstack_ix; |
| 743 | qsortsv((myorigmark+1), max, FUNC_NAME_TO_PTR(sortcv)); |
| 744 | |
| 745 | POPBLOCK(cx,curpm); |
| 746 | POPSTACK(); |
| 747 | CATCH_SET(oldcatch); |
| 748 | } |
| 749 | } |
| 750 | else { |
| 751 | if (max > 1) { |
| 752 | MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */ |
| 753 | qsortsv(ORIGMARK+1, max, |
| 754 | (op->op_private & OPpLOCALE) |
| 755 | ? FUNC_NAME_TO_PTR(sv_cmp_locale) |
| 756 | : FUNC_NAME_TO_PTR(sv_cmp)); |
| 757 | } |
| 758 | } |
| 759 | LEAVE; |
| 760 | stack_sp = ORIGMARK + max; |
| 761 | return nextop; |
| 762 | } |
| 763 | |
| 764 | /* Range stuff. */ |
| 765 | |
| 766 | PP(pp_range) |
| 767 | { |
| 768 | if (GIMME == G_ARRAY) |
| 769 | return cCONDOP->op_true; |
| 770 | return SvTRUEx(PAD_SV(op->op_targ)) ? cCONDOP->op_false : cCONDOP->op_true; |
| 771 | } |
| 772 | |
| 773 | PP(pp_flip) |
| 774 | { |
| 775 | djSP; |
| 776 | |
| 777 | if (GIMME == G_ARRAY) { |
| 778 | RETURNOP(((CONDOP*)cUNOP->op_first)->op_false); |
| 779 | } |
| 780 | else { |
| 781 | dTOPss; |
| 782 | SV *targ = PAD_SV(op->op_targ); |
| 783 | |
| 784 | if ((op->op_private & OPpFLIP_LINENUM) |
| 785 | ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv)) |
| 786 | : SvTRUE(sv) ) { |
| 787 | sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1); |
| 788 | if (op->op_flags & OPf_SPECIAL) { |
| 789 | sv_setiv(targ, 1); |
| 790 | SETs(targ); |
| 791 | RETURN; |
| 792 | } |
| 793 | else { |
| 794 | sv_setiv(targ, 0); |
| 795 | SP--; |
| 796 | RETURNOP(((CONDOP*)cUNOP->op_first)->op_false); |
| 797 | } |
| 798 | } |
| 799 | sv_setpv(TARG, ""); |
| 800 | SETs(targ); |
| 801 | RETURN; |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | PP(pp_flop) |
| 806 | { |
| 807 | djSP; |
| 808 | |
| 809 | if (GIMME == G_ARRAY) { |
| 810 | dPOPPOPssrl; |
| 811 | register I32 i; |
| 812 | register SV *sv; |
| 813 | I32 max; |
| 814 | |
| 815 | if (SvNIOKp(left) || !SvPOKp(left) || |
| 816 | (looks_like_number(left) && *SvPVX(left) != '0') ) |
| 817 | { |
| 818 | i = SvIV(left); |
| 819 | max = SvIV(right); |
| 820 | if (max >= i) { |
| 821 | EXTEND_MORTAL(max - i + 1); |
| 822 | EXTEND(SP, max - i + 1); |
| 823 | } |
| 824 | while (i <= max) { |
| 825 | sv = sv_2mortal(newSViv(i++)); |
| 826 | PUSHs(sv); |
| 827 | } |
| 828 | } |
| 829 | else { |
| 830 | SV *final = sv_mortalcopy(right); |
| 831 | STRLEN len; |
| 832 | char *tmps = SvPV(final, len); |
| 833 | |
| 834 | sv = sv_mortalcopy(left); |
| 835 | while (!SvNIOKp(sv) && SvCUR(sv) <= len && |
| 836 | strNE(SvPVX(sv),tmps) ) { |
| 837 | XPUSHs(sv); |
| 838 | sv = sv_2mortal(newSVsv(sv)); |
| 839 | sv_inc(sv); |
| 840 | } |
| 841 | if (strEQ(SvPVX(sv),tmps)) |
| 842 | XPUSHs(sv); |
| 843 | } |
| 844 | } |
| 845 | else { |
| 846 | dTOPss; |
| 847 | SV *targ = PAD_SV(cUNOP->op_first->op_targ); |
| 848 | sv_inc(targ); |
| 849 | if ((op->op_private & OPpFLIP_LINENUM) |
| 850 | ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv)) |
| 851 | : SvTRUE(sv) ) { |
| 852 | sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0); |
| 853 | sv_catpv(targ, "E0"); |
| 854 | } |
| 855 | SETs(targ); |
| 856 | } |
| 857 | |
| 858 | RETURN; |
| 859 | } |
| 860 | |
| 861 | /* Control. */ |
| 862 | |
| 863 | STATIC I32 |
| 864 | dopoptolabel(char *label) |
| 865 | { |
| 866 | dTHR; |
| 867 | register I32 i; |
| 868 | register PERL_CONTEXT *cx; |
| 869 | |
| 870 | for (i = cxstack_ix; i >= 0; i--) { |
| 871 | cx = &cxstack[i]; |
| 872 | switch (cx->cx_type) { |
| 873 | case CXt_SUBST: |
| 874 | if (dowarn) |
| 875 | warn("Exiting substitution via %s", op_name[op->op_type]); |
| 876 | break; |
| 877 | case CXt_SUB: |
| 878 | if (dowarn) |
| 879 | warn("Exiting subroutine via %s", op_name[op->op_type]); |
| 880 | break; |
| 881 | case CXt_EVAL: |
| 882 | if (dowarn) |
| 883 | warn("Exiting eval via %s", op_name[op->op_type]); |
| 884 | break; |
| 885 | case CXt_NULL: |
| 886 | if (dowarn) |
| 887 | warn("Exiting pseudo-block via %s", op_name[op->op_type]); |
| 888 | return -1; |
| 889 | case CXt_LOOP: |
| 890 | if (!cx->blk_loop.label || |
| 891 | strNE(label, cx->blk_loop.label) ) { |
| 892 | DEBUG_l(deb("(Skipping label #%ld %s)\n", |
| 893 | (long)i, cx->blk_loop.label)); |
| 894 | continue; |
| 895 | } |
| 896 | DEBUG_l( deb("(Found label #%ld %s)\n", (long)i, label)); |
| 897 | return i; |
| 898 | } |
| 899 | } |
| 900 | return i; |
| 901 | } |
| 902 | |
| 903 | I32 |
| 904 | dowantarray(void) |
| 905 | { |
| 906 | I32 gimme = block_gimme(); |
| 907 | return (gimme == G_VOID) ? G_SCALAR : gimme; |
| 908 | } |
| 909 | |
| 910 | I32 |
| 911 | block_gimme(void) |
| 912 | { |
| 913 | dTHR; |
| 914 | I32 cxix; |
| 915 | |
| 916 | cxix = dopoptosub(cxstack_ix); |
| 917 | if (cxix < 0) |
| 918 | return G_VOID; |
| 919 | |
| 920 | switch (cxstack[cxix].blk_gimme) { |
| 921 | case G_VOID: |
| 922 | return G_VOID; |
| 923 | case G_SCALAR: |
| 924 | return G_SCALAR; |
| 925 | case G_ARRAY: |
| 926 | return G_ARRAY; |
| 927 | default: |
| 928 | croak("panic: bad gimme: %d\n", cxstack[cxix].blk_gimme); |
| 929 | /* NOTREACHED */ |
| 930 | return 0; |
| 931 | } |
| 932 | } |
| 933 | |
| 934 | STATIC I32 |
| 935 | dopoptosub(I32 startingblock) |
| 936 | { |
| 937 | dTHR; |
| 938 | I32 i; |
| 939 | register PERL_CONTEXT *cx; |
| 940 | for (i = startingblock; i >= 0; i--) { |
| 941 | cx = &cxstack[i]; |
| 942 | switch (cx->cx_type) { |
| 943 | default: |
| 944 | continue; |
| 945 | case CXt_EVAL: |
| 946 | case CXt_SUB: |
| 947 | DEBUG_l( deb("(Found sub #%ld)\n", (long)i)); |
| 948 | return i; |
| 949 | } |
| 950 | } |
| 951 | return i; |
| 952 | } |
| 953 | |
| 954 | STATIC I32 |
| 955 | dopoptoeval(I32 startingblock) |
| 956 | { |
| 957 | dTHR; |
| 958 | I32 i; |
| 959 | register PERL_CONTEXT *cx; |
| 960 | for (i = startingblock; i >= 0; i--) { |
| 961 | cx = &cxstack[i]; |
| 962 | switch (cx->cx_type) { |
| 963 | default: |
| 964 | continue; |
| 965 | case CXt_EVAL: |
| 966 | DEBUG_l( deb("(Found eval #%ld)\n", (long)i)); |
| 967 | return i; |
| 968 | } |
| 969 | } |
| 970 | return i; |
| 971 | } |
| 972 | |
| 973 | STATIC I32 |
| 974 | dopoptoloop(I32 startingblock) |
| 975 | { |
| 976 | dTHR; |
| 977 | I32 i; |
| 978 | register PERL_CONTEXT *cx; |
| 979 | for (i = startingblock; i >= 0; i--) { |
| 980 | cx = &cxstack[i]; |
| 981 | switch (cx->cx_type) { |
| 982 | case CXt_SUBST: |
| 983 | if (dowarn) |
| 984 | warn("Exiting substitution via %s", op_name[op->op_type]); |
| 985 | break; |
| 986 | case CXt_SUB: |
| 987 | if (dowarn) |
| 988 | warn("Exiting subroutine via %s", op_name[op->op_type]); |
| 989 | break; |
| 990 | case CXt_EVAL: |
| 991 | if (dowarn) |
| 992 | warn("Exiting eval via %s", op_name[op->op_type]); |
| 993 | break; |
| 994 | case CXt_NULL: |
| 995 | if (dowarn) |
| 996 | warn("Exiting pseudo-block via %s", op_name[op->op_type]); |
| 997 | return -1; |
| 998 | case CXt_LOOP: |
| 999 | DEBUG_l( deb("(Found loop #%ld)\n", (long)i)); |
| 1000 | return i; |
| 1001 | } |
| 1002 | } |
| 1003 | return i; |
| 1004 | } |
| 1005 | |
| 1006 | void |
| 1007 | dounwind(I32 cxix) |
| 1008 | { |
| 1009 | dTHR; |
| 1010 | register PERL_CONTEXT *cx; |
| 1011 | SV **newsp; |
| 1012 | I32 optype; |
| 1013 | |
| 1014 | while (cxstack_ix > cxix) { |
| 1015 | cx = &cxstack[cxstack_ix]; |
| 1016 | DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n", |
| 1017 | (long) cxstack_ix, block_type[cx->cx_type])); |
| 1018 | /* Note: we don't need to restore the base context info till the end. */ |
| 1019 | switch (cx->cx_type) { |
| 1020 | case CXt_SUBST: |
| 1021 | POPSUBST(cx); |
| 1022 | continue; /* not break */ |
| 1023 | case CXt_SUB: |
| 1024 | POPSUB(cx); |
| 1025 | break; |
| 1026 | case CXt_EVAL: |
| 1027 | POPEVAL(cx); |
| 1028 | break; |
| 1029 | case CXt_LOOP: |
| 1030 | POPLOOP(cx); |
| 1031 | break; |
| 1032 | case CXt_NULL: |
| 1033 | break; |
| 1034 | } |
| 1035 | cxstack_ix--; |
| 1036 | } |
| 1037 | } |
| 1038 | |
| 1039 | OP * |
| 1040 | die_where(char *message) |
| 1041 | { |
| 1042 | dSP; |
| 1043 | if (in_eval) { |
| 1044 | I32 cxix; |
| 1045 | register PERL_CONTEXT *cx; |
| 1046 | I32 gimme; |
| 1047 | SV **newsp; |
| 1048 | |
| 1049 | if (message) { |
| 1050 | if (in_eval & 4) { |
| 1051 | SV **svp; |
| 1052 | STRLEN klen = strlen(message); |
| 1053 | |
| 1054 | svp = hv_fetch(ERRHV, message, klen, TRUE); |
| 1055 | if (svp) { |
| 1056 | if (!SvIOK(*svp)) { |
| 1057 | static char prefix[] = "\t(in cleanup) "; |
| 1058 | SV *err = ERRSV; |
| 1059 | sv_upgrade(*svp, SVt_IV); |
| 1060 | (void)SvIOK_only(*svp); |
| 1061 | if (!SvPOK(err)) |
| 1062 | sv_setpv(err,""); |
| 1063 | SvGROW(err, SvCUR(err)+sizeof(prefix)+klen); |
| 1064 | sv_catpvn(err, prefix, sizeof(prefix)-1); |
| 1065 | sv_catpvn(err, message, klen); |
| 1066 | } |
| 1067 | sv_inc(*svp); |
| 1068 | } |
| 1069 | } |
| 1070 | else |
| 1071 | sv_setpv(ERRSV, message); |
| 1072 | } |
| 1073 | else |
| 1074 | message = SvPVx(ERRSV, na); |
| 1075 | |
| 1076 | while ((cxix = dopoptoeval(cxstack_ix)) < 0 && curstackinfo->si_prev) { |
| 1077 | dounwind(-1); |
| 1078 | POPSTACK(); |
| 1079 | } |
| 1080 | |
| 1081 | if (cxix >= 0) { |
| 1082 | I32 optype; |
| 1083 | |
| 1084 | if (cxix < cxstack_ix) |
| 1085 | dounwind(cxix); |
| 1086 | |
| 1087 | POPBLOCK(cx,curpm); |
| 1088 | if (cx->cx_type != CXt_EVAL) { |
| 1089 | PerlIO_printf(PerlIO_stderr(), "panic: die %s", message); |
| 1090 | my_exit(1); |
| 1091 | } |
| 1092 | POPEVAL(cx); |
| 1093 | |
| 1094 | if (gimme == G_SCALAR) |
| 1095 | *++newsp = &sv_undef; |
| 1096 | stack_sp = newsp; |
| 1097 | |
| 1098 | LEAVE; |
| 1099 | |
| 1100 | if (optype == OP_REQUIRE) { |
| 1101 | char* msg = SvPVx(ERRSV, na); |
| 1102 | DIE("%s", *msg ? msg : "Compilation failed in require"); |
| 1103 | } |
| 1104 | return pop_return(); |
| 1105 | } |
| 1106 | } |
| 1107 | PerlIO_printf(PerlIO_stderr(), "%s",message); |
| 1108 | PerlIO_flush(PerlIO_stderr()); |
| 1109 | my_failure_exit(); |
| 1110 | /* NOTREACHED */ |
| 1111 | return 0; |
| 1112 | } |
| 1113 | |
| 1114 | PP(pp_xor) |
| 1115 | { |
| 1116 | djSP; dPOPTOPssrl; |
| 1117 | if (SvTRUE(left) != SvTRUE(right)) |
| 1118 | RETSETYES; |
| 1119 | else |
| 1120 | RETSETNO; |
| 1121 | } |
| 1122 | |
| 1123 | PP(pp_andassign) |
| 1124 | { |
| 1125 | djSP; |
| 1126 | if (!SvTRUE(TOPs)) |
| 1127 | RETURN; |
| 1128 | else |
| 1129 | RETURNOP(cLOGOP->op_other); |
| 1130 | } |
| 1131 | |
| 1132 | PP(pp_orassign) |
| 1133 | { |
| 1134 | djSP; |
| 1135 | if (SvTRUE(TOPs)) |
| 1136 | RETURN; |
| 1137 | else |
| 1138 | RETURNOP(cLOGOP->op_other); |
| 1139 | } |
| 1140 | |
| 1141 | PP(pp_caller) |
| 1142 | { |
| 1143 | djSP; |
| 1144 | register I32 cxix = dopoptosub(cxstack_ix); |
| 1145 | register PERL_CONTEXT *cx; |
| 1146 | I32 dbcxix; |
| 1147 | I32 gimme; |
| 1148 | HV *hv; |
| 1149 | SV *sv; |
| 1150 | I32 count = 0; |
| 1151 | |
| 1152 | if (MAXARG) |
| 1153 | count = POPi; |
| 1154 | EXTEND(SP, 6); |
| 1155 | for (;;) { |
| 1156 | if (cxix < 0) { |
| 1157 | if (GIMME != G_ARRAY) |
| 1158 | RETPUSHUNDEF; |
| 1159 | RETURN; |
| 1160 | } |
| 1161 | if (DBsub && cxix >= 0 && |
| 1162 | cxstack[cxix].blk_sub.cv == GvCV(DBsub)) |
| 1163 | count++; |
| 1164 | if (!count--) |
| 1165 | break; |
| 1166 | cxix = dopoptosub(cxix - 1); |
| 1167 | } |
| 1168 | cx = &cxstack[cxix]; |
| 1169 | if (cxstack[cxix].cx_type == CXt_SUB) { |
| 1170 | dbcxix = dopoptosub(cxix - 1); |
| 1171 | /* We expect that cxstack[dbcxix] is CXt_SUB, anyway, the |
| 1172 | field below is defined for any cx. */ |
| 1173 | if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub)) |
| 1174 | cx = &cxstack[dbcxix]; |
| 1175 | } |
| 1176 | |
| 1177 | if (GIMME != G_ARRAY) { |
| 1178 | hv = cx->blk_oldcop->cop_stash; |
| 1179 | if (!hv) |
| 1180 | PUSHs(&sv_undef); |
| 1181 | else { |
| 1182 | dTARGET; |
| 1183 | sv_setpv(TARG, HvNAME(hv)); |
| 1184 | PUSHs(TARG); |
| 1185 | } |
| 1186 | RETURN; |
| 1187 | } |
| 1188 | |
| 1189 | hv = cx->blk_oldcop->cop_stash; |
| 1190 | if (!hv) |
| 1191 | PUSHs(&sv_undef); |
| 1192 | else |
| 1193 | PUSHs(sv_2mortal(newSVpv(HvNAME(hv), 0))); |
| 1194 | PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0))); |
| 1195 | PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line))); |
| 1196 | if (!MAXARG) |
| 1197 | RETURN; |
| 1198 | if (cx->cx_type == CXt_SUB) { /* So is cxstack[dbcxix]. */ |
| 1199 | sv = NEWSV(49, 0); |
| 1200 | gv_efullname3(sv, CvGV(cxstack[cxix].blk_sub.cv), Nullch); |
| 1201 | PUSHs(sv_2mortal(sv)); |
| 1202 | PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs))); |
| 1203 | } |
| 1204 | else { |
| 1205 | PUSHs(sv_2mortal(newSVpv("(eval)",0))); |
| 1206 | PUSHs(sv_2mortal(newSViv(0))); |
| 1207 | } |
| 1208 | gimme = (I32)cx->blk_gimme; |
| 1209 | if (gimme == G_VOID) |
| 1210 | PUSHs(&sv_undef); |
| 1211 | else |
| 1212 | PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY))); |
| 1213 | if (cx->cx_type == CXt_EVAL) { |
| 1214 | if (cx->blk_eval.old_op_type == OP_ENTEREVAL) { |
| 1215 | PUSHs(cx->blk_eval.cur_text); |
| 1216 | PUSHs(&sv_no); |
| 1217 | } |
| 1218 | else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */ |
| 1219 | /* Require, put the name. */ |
| 1220 | PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0))); |
| 1221 | PUSHs(&sv_yes); |
| 1222 | } |
| 1223 | } |
| 1224 | else if (cx->cx_type == CXt_SUB && |
| 1225 | cx->blk_sub.hasargs && |
| 1226 | curcop->cop_stash == debstash) |
| 1227 | { |
| 1228 | AV *ary = cx->blk_sub.argarray; |
| 1229 | int off = AvARRAY(ary) - AvALLOC(ary); |
| 1230 | |
| 1231 | if (!dbargs) { |
| 1232 | GV* tmpgv; |
| 1233 | dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE, |
| 1234 | SVt_PVAV))); |
| 1235 | GvMULTI_on(tmpgv); |
| 1236 | AvREAL_off(dbargs); /* XXX Should be REIFY */ |
| 1237 | } |
| 1238 | |
| 1239 | if (AvMAX(dbargs) < AvFILLp(ary) + off) |
| 1240 | av_extend(dbargs, AvFILLp(ary) + off); |
| 1241 | Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILLp(ary) + 1 + off, SV*); |
| 1242 | AvFILLp(dbargs) = AvFILLp(ary) + off; |
| 1243 | } |
| 1244 | RETURN; |
| 1245 | } |
| 1246 | |
| 1247 | STATIC I32 |
| 1248 | sortcv(SV *a, SV *b) |
| 1249 | { |
| 1250 | dTHR; |
| 1251 | I32 oldsaveix = savestack_ix; |
| 1252 | I32 oldscopeix = scopestack_ix; |
| 1253 | I32 result; |
| 1254 | GvSV(firstgv) = a; |
| 1255 | GvSV(secondgv) = b; |
| 1256 | stack_sp = stack_base; |
| 1257 | op = sortcop; |
| 1258 | CALLRUNOPS(); |
| 1259 | if (stack_sp != stack_base + 1) |
| 1260 | croak("Sort subroutine didn't return single value"); |
| 1261 | if (!SvNIOKp(*stack_sp)) |
| 1262 | croak("Sort subroutine didn't return a numeric value"); |
| 1263 | result = SvIV(*stack_sp); |
| 1264 | while (scopestack_ix > oldscopeix) { |
| 1265 | LEAVE; |
| 1266 | } |
| 1267 | leave_scope(oldsaveix); |
| 1268 | return result; |
| 1269 | } |
| 1270 | |
| 1271 | PP(pp_reset) |
| 1272 | { |
| 1273 | djSP; |
| 1274 | char *tmps; |
| 1275 | |
| 1276 | if (MAXARG < 1) |
| 1277 | tmps = ""; |
| 1278 | else |
| 1279 | tmps = POPp; |
| 1280 | sv_reset(tmps, curcop->cop_stash); |
| 1281 | PUSHs(&sv_yes); |
| 1282 | RETURN; |
| 1283 | } |
| 1284 | |
| 1285 | PP(pp_lineseq) |
| 1286 | { |
| 1287 | return NORMAL; |
| 1288 | } |
| 1289 | |
| 1290 | PP(pp_dbstate) |
| 1291 | { |
| 1292 | curcop = (COP*)op; |
| 1293 | TAINT_NOT; /* Each statement is presumed innocent */ |
| 1294 | stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp; |
| 1295 | FREETMPS; |
| 1296 | |
| 1297 | if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace)) |
| 1298 | { |
| 1299 | djSP; |
| 1300 | register CV *cv; |
| 1301 | register PERL_CONTEXT *cx; |
| 1302 | I32 gimme = G_ARRAY; |
| 1303 | I32 hasargs; |
| 1304 | GV *gv; |
| 1305 | |
| 1306 | gv = DBgv; |
| 1307 | cv = GvCV(gv); |
| 1308 | if (!cv) |
| 1309 | DIE("No DB::DB routine defined"); |
| 1310 | |
| 1311 | if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */ |
| 1312 | return NORMAL; |
| 1313 | |
| 1314 | ENTER; |
| 1315 | SAVETMPS; |
| 1316 | |
| 1317 | SAVEI32(debug); |
| 1318 | SAVESTACK_POS(); |
| 1319 | debug = 0; |
| 1320 | hasargs = 0; |
| 1321 | SPAGAIN; |
| 1322 | |
| 1323 | push_return(op->op_next); |
| 1324 | PUSHBLOCK(cx, CXt_SUB, SP); |
| 1325 | PUSHSUB(cx); |
| 1326 | CvDEPTH(cv)++; |
| 1327 | (void)SvREFCNT_inc(cv); |
| 1328 | SAVESPTR(curpad); |
| 1329 | curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE)); |
| 1330 | RETURNOP(CvSTART(cv)); |
| 1331 | } |
| 1332 | else |
| 1333 | return NORMAL; |
| 1334 | } |
| 1335 | |
| 1336 | PP(pp_scope) |
| 1337 | { |
| 1338 | return NORMAL; |
| 1339 | } |
| 1340 | |
| 1341 | PP(pp_enteriter) |
| 1342 | { |
| 1343 | djSP; dMARK; |
| 1344 | register PERL_CONTEXT *cx; |
| 1345 | I32 gimme = GIMME_V; |
| 1346 | SV **svp; |
| 1347 | |
| 1348 | ENTER; |
| 1349 | SAVETMPS; |
| 1350 | |
| 1351 | #ifdef USE_THREADS |
| 1352 | if (op->op_flags & OPf_SPECIAL) |
| 1353 | svp = save_threadsv(op->op_targ); /* per-thread variable */ |
| 1354 | else |
| 1355 | #endif /* USE_THREADS */ |
| 1356 | if (op->op_targ) { |
| 1357 | svp = &curpad[op->op_targ]; /* "my" variable */ |
| 1358 | SAVESPTR(*svp); |
| 1359 | } |
| 1360 | else { |
| 1361 | GV *gv = (GV*)POPs; |
| 1362 | (void)save_scalar(gv); |
| 1363 | svp = &GvSV(gv); /* symbol table variable */ |
| 1364 | } |
| 1365 | |
| 1366 | ENTER; |
| 1367 | |
| 1368 | PUSHBLOCK(cx, CXt_LOOP, SP); |
| 1369 | PUSHLOOP(cx, svp, MARK); |
| 1370 | if (op->op_flags & OPf_STACKED) |
| 1371 | cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs); |
| 1372 | else { |
| 1373 | cx->blk_loop.iterary = curstack; |
| 1374 | AvFILLp(curstack) = SP - stack_base; |
| 1375 | cx->blk_loop.iterix = MARK - stack_base; |
| 1376 | } |
| 1377 | |
| 1378 | RETURN; |
| 1379 | } |
| 1380 | |
| 1381 | PP(pp_enterloop) |
| 1382 | { |
| 1383 | djSP; |
| 1384 | register PERL_CONTEXT *cx; |
| 1385 | I32 gimme = GIMME_V; |
| 1386 | |
| 1387 | ENTER; |
| 1388 | SAVETMPS; |
| 1389 | ENTER; |
| 1390 | |
| 1391 | PUSHBLOCK(cx, CXt_LOOP, SP); |
| 1392 | PUSHLOOP(cx, 0, SP); |
| 1393 | |
| 1394 | RETURN; |
| 1395 | } |
| 1396 | |
| 1397 | PP(pp_leaveloop) |
| 1398 | { |
| 1399 | djSP; |
| 1400 | register PERL_CONTEXT *cx; |
| 1401 | struct block_loop cxloop; |
| 1402 | I32 gimme; |
| 1403 | SV **newsp; |
| 1404 | PMOP *newpm; |
| 1405 | SV **mark; |
| 1406 | |
| 1407 | POPBLOCK(cx,newpm); |
| 1408 | mark = newsp; |
| 1409 | POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */ |
| 1410 | |
| 1411 | TAINT_NOT; |
| 1412 | if (gimme == G_VOID) |
| 1413 | ; /* do nothing */ |
| 1414 | else if (gimme == G_SCALAR) { |
| 1415 | if (mark < SP) |
| 1416 | *++newsp = sv_mortalcopy(*SP); |
| 1417 | else |
| 1418 | *++newsp = &sv_undef; |
| 1419 | } |
| 1420 | else { |
| 1421 | while (mark < SP) { |
| 1422 | *++newsp = sv_mortalcopy(*++mark); |
| 1423 | TAINT_NOT; /* Each item is independent */ |
| 1424 | } |
| 1425 | } |
| 1426 | SP = newsp; |
| 1427 | PUTBACK; |
| 1428 | |
| 1429 | POPLOOP2(); /* Stack values are safe: release loop vars ... */ |
| 1430 | curpm = newpm; /* ... and pop $1 et al */ |
| 1431 | |
| 1432 | LEAVE; |
| 1433 | LEAVE; |
| 1434 | |
| 1435 | return NORMAL; |
| 1436 | } |
| 1437 | |
| 1438 | PP(pp_return) |
| 1439 | { |
| 1440 | djSP; dMARK; |
| 1441 | I32 cxix; |
| 1442 | register PERL_CONTEXT *cx; |
| 1443 | struct block_sub cxsub; |
| 1444 | bool popsub2 = FALSE; |
| 1445 | I32 gimme; |
| 1446 | SV **newsp; |
| 1447 | PMOP *newpm; |
| 1448 | I32 optype = 0; |
| 1449 | |
| 1450 | if (curstackinfo->si_type == SI_SORT) { |
| 1451 | if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) <= sortcxix) { |
| 1452 | if (cxstack_ix > sortcxix) |
| 1453 | dounwind(sortcxix); |
| 1454 | AvARRAY(curstack)[1] = *SP; |
| 1455 | stack_sp = stack_base + 1; |
| 1456 | return 0; |
| 1457 | } |
| 1458 | } |
| 1459 | |
| 1460 | cxix = dopoptosub(cxstack_ix); |
| 1461 | if (cxix < 0) |
| 1462 | DIE("Can't return outside a subroutine"); |
| 1463 | if (cxix < cxstack_ix) |
| 1464 | dounwind(cxix); |
| 1465 | |
| 1466 | POPBLOCK(cx,newpm); |
| 1467 | switch (cx->cx_type) { |
| 1468 | case CXt_SUB: |
| 1469 | POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */ |
| 1470 | popsub2 = TRUE; |
| 1471 | break; |
| 1472 | case CXt_EVAL: |
| 1473 | POPEVAL(cx); |
| 1474 | if (optype == OP_REQUIRE && |
| 1475 | (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) ) |
| 1476 | { |
| 1477 | /* Unassume the success we assumed earlier. */ |
| 1478 | char *name = cx->blk_eval.old_name; |
| 1479 | (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD); |
| 1480 | DIE("%s did not return a true value", name); |
| 1481 | } |
| 1482 | break; |
| 1483 | default: |
| 1484 | DIE("panic: return"); |
| 1485 | } |
| 1486 | |
| 1487 | TAINT_NOT; |
| 1488 | if (gimme == G_SCALAR) { |
| 1489 | if (MARK < SP) |
| 1490 | *++newsp = (popsub2 && SvTEMP(*SP)) |
| 1491 | ? *SP : sv_mortalcopy(*SP); |
| 1492 | else |
| 1493 | *++newsp = &sv_undef; |
| 1494 | } |
| 1495 | else if (gimme == G_ARRAY) { |
| 1496 | while (++MARK <= SP) { |
| 1497 | *++newsp = (popsub2 && SvTEMP(*MARK)) |
| 1498 | ? *MARK : sv_mortalcopy(*MARK); |
| 1499 | TAINT_NOT; /* Each item is independent */ |
| 1500 | } |
| 1501 | } |
| 1502 | stack_sp = newsp; |
| 1503 | |
| 1504 | /* Stack values are safe: */ |
| 1505 | if (popsub2) { |
| 1506 | POPSUB2(); /* release CV and @_ ... */ |
| 1507 | } |
| 1508 | curpm = newpm; /* ... and pop $1 et al */ |
| 1509 | |
| 1510 | LEAVE; |
| 1511 | return pop_return(); |
| 1512 | } |
| 1513 | |
| 1514 | PP(pp_last) |
| 1515 | { |
| 1516 | djSP; |
| 1517 | I32 cxix; |
| 1518 | register PERL_CONTEXT *cx; |
| 1519 | struct block_loop cxloop; |
| 1520 | struct block_sub cxsub; |
| 1521 | I32 pop2 = 0; |
| 1522 | I32 gimme; |
| 1523 | I32 optype; |
| 1524 | OP *nextop; |
| 1525 | SV **newsp; |
| 1526 | PMOP *newpm; |
| 1527 | SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp; |
| 1528 | |
| 1529 | if (op->op_flags & OPf_SPECIAL) { |
| 1530 | cxix = dopoptoloop(cxstack_ix); |
| 1531 | if (cxix < 0) |
| 1532 | DIE("Can't \"last\" outside a block"); |
| 1533 | } |
| 1534 | else { |
| 1535 | cxix = dopoptolabel(cPVOP->op_pv); |
| 1536 | if (cxix < 0) |
| 1537 | DIE("Label not found for \"last %s\"", cPVOP->op_pv); |
| 1538 | } |
| 1539 | if (cxix < cxstack_ix) |
| 1540 | dounwind(cxix); |
| 1541 | |
| 1542 | POPBLOCK(cx,newpm); |
| 1543 | switch (cx->cx_type) { |
| 1544 | case CXt_LOOP: |
| 1545 | POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */ |
| 1546 | pop2 = CXt_LOOP; |
| 1547 | nextop = cxloop.last_op->op_next; |
| 1548 | break; |
| 1549 | case CXt_SUB: |
| 1550 | POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */ |
| 1551 | pop2 = CXt_SUB; |
| 1552 | nextop = pop_return(); |
| 1553 | break; |
| 1554 | case CXt_EVAL: |
| 1555 | POPEVAL(cx); |
| 1556 | nextop = pop_return(); |
| 1557 | break; |
| 1558 | default: |
| 1559 | DIE("panic: last"); |
| 1560 | } |
| 1561 | |
| 1562 | TAINT_NOT; |
| 1563 | if (gimme == G_SCALAR) { |
| 1564 | if (MARK < SP) |
| 1565 | *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP)) |
| 1566 | ? *SP : sv_mortalcopy(*SP); |
| 1567 | else |
| 1568 | *++newsp = &sv_undef; |
| 1569 | } |
| 1570 | else if (gimme == G_ARRAY) { |
| 1571 | while (++MARK <= SP) { |
| 1572 | *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK)) |
| 1573 | ? *MARK : sv_mortalcopy(*MARK); |
| 1574 | TAINT_NOT; /* Each item is independent */ |
| 1575 | } |
| 1576 | } |
| 1577 | SP = newsp; |
| 1578 | PUTBACK; |
| 1579 | |
| 1580 | /* Stack values are safe: */ |
| 1581 | switch (pop2) { |
| 1582 | case CXt_LOOP: |
| 1583 | POPLOOP2(); /* release loop vars ... */ |
| 1584 | LEAVE; |
| 1585 | break; |
| 1586 | case CXt_SUB: |
| 1587 | POPSUB2(); /* release CV and @_ ... */ |
| 1588 | break; |
| 1589 | } |
| 1590 | curpm = newpm; /* ... and pop $1 et al */ |
| 1591 | |
| 1592 | LEAVE; |
| 1593 | return nextop; |
| 1594 | } |
| 1595 | |
| 1596 | PP(pp_next) |
| 1597 | { |
| 1598 | I32 cxix; |
| 1599 | register PERL_CONTEXT *cx; |
| 1600 | I32 oldsave; |
| 1601 | |
| 1602 | if (op->op_flags & OPf_SPECIAL) { |
| 1603 | cxix = dopoptoloop(cxstack_ix); |
| 1604 | if (cxix < 0) |
| 1605 | DIE("Can't \"next\" outside a block"); |
| 1606 | } |
| 1607 | else { |
| 1608 | cxix = dopoptolabel(cPVOP->op_pv); |
| 1609 | if (cxix < 0) |
| 1610 | DIE("Label not found for \"next %s\"", cPVOP->op_pv); |
| 1611 | } |
| 1612 | if (cxix < cxstack_ix) |
| 1613 | dounwind(cxix); |
| 1614 | |
| 1615 | TOPBLOCK(cx); |
| 1616 | oldsave = scopestack[scopestack_ix - 1]; |
| 1617 | LEAVE_SCOPE(oldsave); |
| 1618 | return cx->blk_loop.next_op; |
| 1619 | } |
| 1620 | |
| 1621 | PP(pp_redo) |
| 1622 | { |
| 1623 | I32 cxix; |
| 1624 | register PERL_CONTEXT *cx; |
| 1625 | I32 oldsave; |
| 1626 | |
| 1627 | if (op->op_flags & OPf_SPECIAL) { |
| 1628 | cxix = dopoptoloop(cxstack_ix); |
| 1629 | if (cxix < 0) |
| 1630 | DIE("Can't \"redo\" outside a block"); |
| 1631 | } |
| 1632 | else { |
| 1633 | cxix = dopoptolabel(cPVOP->op_pv); |
| 1634 | if (cxix < 0) |
| 1635 | DIE("Label not found for \"redo %s\"", cPVOP->op_pv); |
| 1636 | } |
| 1637 | if (cxix < cxstack_ix) |
| 1638 | dounwind(cxix); |
| 1639 | |
| 1640 | TOPBLOCK(cx); |
| 1641 | oldsave = scopestack[scopestack_ix - 1]; |
| 1642 | LEAVE_SCOPE(oldsave); |
| 1643 | return cx->blk_loop.redo_op; |
| 1644 | } |
| 1645 | |
| 1646 | STATIC OP * |
| 1647 | dofindlabel(OP *o, char *label, OP **opstack, OP **oplimit) |
| 1648 | { |
| 1649 | OP *kid; |
| 1650 | OP **ops = opstack; |
| 1651 | static char too_deep[] = "Target of goto is too deeply nested"; |
| 1652 | |
| 1653 | if (ops >= oplimit) |
| 1654 | croak(too_deep); |
| 1655 | if (o->op_type == OP_LEAVE || |
| 1656 | o->op_type == OP_SCOPE || |
| 1657 | o->op_type == OP_LEAVELOOP || |
| 1658 | o->op_type == OP_LEAVETRY) |
| 1659 | { |
| 1660 | *ops++ = cUNOPo->op_first; |
| 1661 | if (ops >= oplimit) |
| 1662 | croak(too_deep); |
| 1663 | } |
| 1664 | *ops = 0; |
| 1665 | if (o->op_flags & OPf_KIDS) { |
| 1666 | /* First try all the kids at this level, since that's likeliest. */ |
| 1667 | for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) { |
| 1668 | if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) && |
| 1669 | kCOP->cop_label && strEQ(kCOP->cop_label, label)) |
| 1670 | return kid; |
| 1671 | } |
| 1672 | for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) { |
| 1673 | if (kid == lastgotoprobe) |
| 1674 | continue; |
| 1675 | if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) && |
| 1676 | (ops == opstack || |
| 1677 | (ops[-1]->op_type != OP_NEXTSTATE && |
| 1678 | ops[-1]->op_type != OP_DBSTATE))) |
| 1679 | *ops++ = kid; |
| 1680 | if (o = dofindlabel(kid, label, ops, oplimit)) |
| 1681 | return o; |
| 1682 | } |
| 1683 | } |
| 1684 | *ops = 0; |
| 1685 | return 0; |
| 1686 | } |
| 1687 | |
| 1688 | PP(pp_dump) |
| 1689 | { |
| 1690 | return pp_goto(ARGS); |
| 1691 | /*NOTREACHED*/ |
| 1692 | } |
| 1693 | |
| 1694 | PP(pp_goto) |
| 1695 | { |
| 1696 | djSP; |
| 1697 | OP *retop = 0; |
| 1698 | I32 ix; |
| 1699 | register PERL_CONTEXT *cx; |
| 1700 | #define GOTO_DEPTH 64 |
| 1701 | OP *enterops[GOTO_DEPTH]; |
| 1702 | char *label; |
| 1703 | int do_dump = (op->op_type == OP_DUMP); |
| 1704 | |
| 1705 | label = 0; |
| 1706 | if (op->op_flags & OPf_STACKED) { |
| 1707 | SV *sv = POPs; |
| 1708 | |
| 1709 | /* This egregious kludge implements goto &subroutine */ |
| 1710 | if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) { |
| 1711 | I32 cxix; |
| 1712 | register PERL_CONTEXT *cx; |
| 1713 | CV* cv = (CV*)SvRV(sv); |
| 1714 | SV** mark; |
| 1715 | I32 items = 0; |
| 1716 | I32 oldsave; |
| 1717 | |
| 1718 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
| 1719 | if (CvGV(cv)) { |
| 1720 | SV *tmpstr = sv_newmortal(); |
| 1721 | gv_efullname3(tmpstr, CvGV(cv), Nullch); |
| 1722 | DIE("Goto undefined subroutine &%s",SvPVX(tmpstr)); |
| 1723 | } |
| 1724 | DIE("Goto undefined subroutine"); |
| 1725 | } |
| 1726 | |
| 1727 | /* First do some returnish stuff. */ |
| 1728 | cxix = dopoptosub(cxstack_ix); |
| 1729 | if (cxix < 0) |
| 1730 | DIE("Can't goto subroutine outside a subroutine"); |
| 1731 | if (cxix < cxstack_ix) |
| 1732 | dounwind(cxix); |
| 1733 | TOPBLOCK(cx); |
| 1734 | if (cx->cx_type == CXt_EVAL && cx->blk_eval.old_op_type == OP_ENTEREVAL) |
| 1735 | DIE("Can't goto subroutine from an eval-string"); |
| 1736 | mark = stack_sp; |
| 1737 | if (cx->cx_type == CXt_SUB && |
| 1738 | cx->blk_sub.hasargs) { /* put @_ back onto stack */ |
| 1739 | AV* av = cx->blk_sub.argarray; |
| 1740 | |
| 1741 | items = AvFILLp(av) + 1; |
| 1742 | stack_sp++; |
| 1743 | EXTEND(stack_sp, items); /* @_ could have been extended. */ |
| 1744 | Copy(AvARRAY(av), stack_sp, items, SV*); |
| 1745 | stack_sp += items; |
| 1746 | #ifndef USE_THREADS |
| 1747 | SvREFCNT_dec(GvAV(defgv)); |
| 1748 | GvAV(defgv) = cx->blk_sub.savearray; |
| 1749 | #endif /* USE_THREADS */ |
| 1750 | AvREAL_off(av); |
| 1751 | av_clear(av); |
| 1752 | } |
| 1753 | if (cx->cx_type == CXt_SUB && |
| 1754 | !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth)) |
| 1755 | SvREFCNT_dec(cx->blk_sub.cv); |
| 1756 | oldsave = scopestack[scopestack_ix - 1]; |
| 1757 | LEAVE_SCOPE(oldsave); |
| 1758 | |
| 1759 | /* Now do some callish stuff. */ |
| 1760 | SAVETMPS; |
| 1761 | if (CvXSUB(cv)) { |
| 1762 | if (CvOLDSTYLE(cv)) { |
| 1763 | I32 (*fp3)_((int,int,int)); |
| 1764 | while (SP > mark) { |
| 1765 | SP[1] = SP[0]; |
| 1766 | SP--; |
| 1767 | } |
| 1768 | fp3 = (I32(*)_((int,int,int)))CvXSUB(cv); |
| 1769 | items = (*fp3)(CvXSUBANY(cv).any_i32, |
| 1770 | mark - stack_base + 1, |
| 1771 | items); |
| 1772 | SP = stack_base + items; |
| 1773 | } |
| 1774 | else { |
| 1775 | stack_sp--; /* There is no cv arg. */ |
| 1776 | (void)(*CvXSUB(cv))(cv _PERL_OBJECT_THIS); |
| 1777 | } |
| 1778 | LEAVE; |
| 1779 | return pop_return(); |
| 1780 | } |
| 1781 | else { |
| 1782 | AV* padlist = CvPADLIST(cv); |
| 1783 | SV** svp = AvARRAY(padlist); |
| 1784 | if (cx->cx_type == CXt_EVAL) { |
| 1785 | in_eval = cx->blk_eval.old_in_eval; |
| 1786 | eval_root = cx->blk_eval.old_eval_root; |
| 1787 | cx->cx_type = CXt_SUB; |
| 1788 | cx->blk_sub.hasargs = 0; |
| 1789 | } |
| 1790 | cx->blk_sub.cv = cv; |
| 1791 | cx->blk_sub.olddepth = CvDEPTH(cv); |
| 1792 | CvDEPTH(cv)++; |
| 1793 | if (CvDEPTH(cv) < 2) |
| 1794 | (void)SvREFCNT_inc(cv); |
| 1795 | else { /* save temporaries on recursion? */ |
| 1796 | if (CvDEPTH(cv) == 100 && dowarn) |
| 1797 | sub_crush_depth(cv); |
| 1798 | if (CvDEPTH(cv) > AvFILLp(padlist)) { |
| 1799 | AV *newpad = newAV(); |
| 1800 | SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]); |
| 1801 | I32 ix = AvFILLp((AV*)svp[1]); |
| 1802 | svp = AvARRAY(svp[0]); |
| 1803 | for ( ;ix > 0; ix--) { |
| 1804 | if (svp[ix] != &sv_undef) { |
| 1805 | char *name = SvPVX(svp[ix]); |
| 1806 | if ((SvFLAGS(svp[ix]) & SVf_FAKE) |
| 1807 | || *name == '&') |
| 1808 | { |
| 1809 | /* outer lexical or anon code */ |
| 1810 | av_store(newpad, ix, |
| 1811 | SvREFCNT_inc(oldpad[ix]) ); |
| 1812 | } |
| 1813 | else { /* our own lexical */ |
| 1814 | if (*name == '@') |
| 1815 | av_store(newpad, ix, sv = (SV*)newAV()); |
| 1816 | else if (*name == '%') |
| 1817 | av_store(newpad, ix, sv = (SV*)newHV()); |
| 1818 | else |
| 1819 | av_store(newpad, ix, sv = NEWSV(0,0)); |
| 1820 | SvPADMY_on(sv); |
| 1821 | } |
| 1822 | } |
| 1823 | else { |
| 1824 | av_store(newpad, ix, sv = NEWSV(0,0)); |
| 1825 | SvPADTMP_on(sv); |
| 1826 | } |
| 1827 | } |
| 1828 | if (cx->blk_sub.hasargs) { |
| 1829 | AV* av = newAV(); |
| 1830 | av_extend(av, 0); |
| 1831 | av_store(newpad, 0, (SV*)av); |
| 1832 | AvFLAGS(av) = AVf_REIFY; |
| 1833 | } |
| 1834 | av_store(padlist, CvDEPTH(cv), (SV*)newpad); |
| 1835 | AvFILLp(padlist) = CvDEPTH(cv); |
| 1836 | svp = AvARRAY(padlist); |
| 1837 | } |
| 1838 | } |
| 1839 | #ifdef USE_THREADS |
| 1840 | if (!cx->blk_sub.hasargs) { |
| 1841 | AV* av = (AV*)curpad[0]; |
| 1842 | |
| 1843 | items = AvFILLp(av) + 1; |
| 1844 | if (items) { |
| 1845 | /* Mark is at the end of the stack. */ |
| 1846 | EXTEND(SP, items); |
| 1847 | Copy(AvARRAY(av), SP + 1, items, SV*); |
| 1848 | SP += items; |
| 1849 | PUTBACK ; |
| 1850 | } |
| 1851 | } |
| 1852 | #endif /* USE_THREADS */ |
| 1853 | SAVESPTR(curpad); |
| 1854 | curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]); |
| 1855 | #ifndef USE_THREADS |
| 1856 | if (cx->blk_sub.hasargs) |
| 1857 | #endif /* USE_THREADS */ |
| 1858 | { |
| 1859 | AV* av = (AV*)curpad[0]; |
| 1860 | SV** ary; |
| 1861 | |
| 1862 | #ifndef USE_THREADS |
| 1863 | cx->blk_sub.savearray = GvAV(defgv); |
| 1864 | GvAV(defgv) = (AV*)SvREFCNT_inc(av); |
| 1865 | #endif /* USE_THREADS */ |
| 1866 | cx->blk_sub.argarray = av; |
| 1867 | ++mark; |
| 1868 | |
| 1869 | if (items >= AvMAX(av) + 1) { |
| 1870 | ary = AvALLOC(av); |
| 1871 | if (AvARRAY(av) != ary) { |
| 1872 | AvMAX(av) += AvARRAY(av) - AvALLOC(av); |
| 1873 | SvPVX(av) = (char*)ary; |
| 1874 | } |
| 1875 | if (items >= AvMAX(av) + 1) { |
| 1876 | AvMAX(av) = items - 1; |
| 1877 | Renew(ary,items+1,SV*); |
| 1878 | AvALLOC(av) = ary; |
| 1879 | SvPVX(av) = (char*)ary; |
| 1880 | } |
| 1881 | } |
| 1882 | Copy(mark,AvARRAY(av),items,SV*); |
| 1883 | AvFILLp(av) = items - 1; |
| 1884 | |
| 1885 | while (items--) { |
| 1886 | if (*mark) |
| 1887 | SvTEMP_off(*mark); |
| 1888 | mark++; |
| 1889 | } |
| 1890 | } |
| 1891 | if (PERLDB_SUB) { /* Checking curstash breaks DProf. */ |
| 1892 | /* |
| 1893 | * We do not care about using sv to call CV; |
| 1894 | * it's for informational purposes only. |
| 1895 | */ |
| 1896 | SV *sv = GvSV(DBsub); |
| 1897 | CV *gotocv; |
| 1898 | |
| 1899 | if (PERLDB_SUB_NN) { |
| 1900 | SvIVX(sv) = (IV)cv; /* Already upgraded, saved */ |
| 1901 | } else { |
| 1902 | save_item(sv); |
| 1903 | gv_efullname3(sv, CvGV(cv), Nullch); |
| 1904 | } |
| 1905 | if ( PERLDB_GOTO |
| 1906 | && (gotocv = perl_get_cv("DB::goto", FALSE)) ) { |
| 1907 | PUSHMARK( stack_sp ); |
| 1908 | perl_call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG); |
| 1909 | stack_sp--; |
| 1910 | } |
| 1911 | } |
| 1912 | RETURNOP(CvSTART(cv)); |
| 1913 | } |
| 1914 | } |
| 1915 | else |
| 1916 | label = SvPV(sv,na); |
| 1917 | } |
| 1918 | else if (op->op_flags & OPf_SPECIAL) { |
| 1919 | if (! do_dump) |
| 1920 | DIE("goto must have label"); |
| 1921 | } |
| 1922 | else |
| 1923 | label = cPVOP->op_pv; |
| 1924 | |
| 1925 | if (label && *label) { |
| 1926 | OP *gotoprobe = 0; |
| 1927 | |
| 1928 | /* find label */ |
| 1929 | |
| 1930 | lastgotoprobe = 0; |
| 1931 | *enterops = 0; |
| 1932 | for (ix = cxstack_ix; ix >= 0; ix--) { |
| 1933 | cx = &cxstack[ix]; |
| 1934 | switch (cx->cx_type) { |
| 1935 | case CXt_EVAL: |
| 1936 | gotoprobe = eval_root; /* XXX not good for nested eval */ |
| 1937 | break; |
| 1938 | case CXt_LOOP: |
| 1939 | gotoprobe = cx->blk_oldcop->op_sibling; |
| 1940 | break; |
| 1941 | case CXt_SUBST: |
| 1942 | continue; |
| 1943 | case CXt_BLOCK: |
| 1944 | if (ix) |
| 1945 | gotoprobe = cx->blk_oldcop->op_sibling; |
| 1946 | else |
| 1947 | gotoprobe = main_root; |
| 1948 | break; |
| 1949 | case CXt_SUB: |
| 1950 | if (CvDEPTH(cx->blk_sub.cv)) { |
| 1951 | gotoprobe = CvROOT(cx->blk_sub.cv); |
| 1952 | break; |
| 1953 | } |
| 1954 | /* FALL THROUGH */ |
| 1955 | case CXt_NULL: |
| 1956 | DIE("Can't \"goto\" outside a block"); |
| 1957 | default: |
| 1958 | if (ix) |
| 1959 | DIE("panic: goto"); |
| 1960 | gotoprobe = main_root; |
| 1961 | break; |
| 1962 | } |
| 1963 | retop = dofindlabel(gotoprobe, label, |
| 1964 | enterops, enterops + GOTO_DEPTH); |
| 1965 | if (retop) |
| 1966 | break; |
| 1967 | lastgotoprobe = gotoprobe; |
| 1968 | } |
| 1969 | if (!retop) |
| 1970 | DIE("Can't find label %s", label); |
| 1971 | |
| 1972 | /* pop unwanted frames */ |
| 1973 | |
| 1974 | if (ix < cxstack_ix) { |
| 1975 | I32 oldsave; |
| 1976 | |
| 1977 | if (ix < 0) |
| 1978 | ix = 0; |
| 1979 | dounwind(ix); |
| 1980 | TOPBLOCK(cx); |
| 1981 | oldsave = scopestack[scopestack_ix]; |
| 1982 | LEAVE_SCOPE(oldsave); |
| 1983 | } |
| 1984 | |
| 1985 | /* push wanted frames */ |
| 1986 | |
| 1987 | if (*enterops && enterops[1]) { |
| 1988 | OP *oldop = op; |
| 1989 | for (ix = 1; enterops[ix]; ix++) { |
| 1990 | op = enterops[ix]; |
| 1991 | /* Eventually we may want to stack the needed arguments |
| 1992 | * for each op. For now, we punt on the hard ones. */ |
| 1993 | if (op->op_type == OP_ENTERITER) |
| 1994 | DIE("Can't \"goto\" into the middle of a foreach loop", |
| 1995 | label); |
| 1996 | (CALLOP->op_ppaddr)(ARGS); |
| 1997 | } |
| 1998 | op = oldop; |
| 1999 | } |
| 2000 | } |
| 2001 | |
| 2002 | if (do_dump) { |
| 2003 | #ifdef VMS |
| 2004 | if (!retop) retop = main_start; |
| 2005 | #endif |
| 2006 | restartop = retop; |
| 2007 | do_undump = TRUE; |
| 2008 | |
| 2009 | my_unexec(); |
| 2010 | |
| 2011 | restartop = 0; /* hmm, must be GNU unexec().. */ |
| 2012 | do_undump = FALSE; |
| 2013 | } |
| 2014 | |
| 2015 | if (top_env->je_prev) { |
| 2016 | restartop = retop; |
| 2017 | JMPENV_JUMP(3); |
| 2018 | } |
| 2019 | |
| 2020 | RETURNOP(retop); |
| 2021 | } |
| 2022 | |
| 2023 | PP(pp_exit) |
| 2024 | { |
| 2025 | djSP; |
| 2026 | I32 anum; |
| 2027 | |
| 2028 | if (MAXARG < 1) |
| 2029 | anum = 0; |
| 2030 | else { |
| 2031 | anum = SvIVx(POPs); |
| 2032 | #ifdef VMSISH_EXIT |
| 2033 | if (anum == 1 && VMSISH_EXIT) |
| 2034 | anum = 0; |
| 2035 | #endif |
| 2036 | } |
| 2037 | my_exit(anum); |
| 2038 | PUSHs(&sv_undef); |
| 2039 | RETURN; |
| 2040 | } |
| 2041 | |
| 2042 | #ifdef NOTYET |
| 2043 | PP(pp_nswitch) |
| 2044 | { |
| 2045 | djSP; |
| 2046 | double value = SvNVx(GvSV(cCOP->cop_gv)); |
| 2047 | register I32 match = I_32(value); |
| 2048 | |
| 2049 | if (value < 0.0) { |
| 2050 | if (((double)match) > value) |
| 2051 | --match; /* was fractional--truncate other way */ |
| 2052 | } |
| 2053 | match -= cCOP->uop.scop.scop_offset; |
| 2054 | if (match < 0) |
| 2055 | match = 0; |
| 2056 | else if (match > cCOP->uop.scop.scop_max) |
| 2057 | match = cCOP->uop.scop.scop_max; |
| 2058 | op = cCOP->uop.scop.scop_next[match]; |
| 2059 | RETURNOP(op); |
| 2060 | } |
| 2061 | |
| 2062 | PP(pp_cswitch) |
| 2063 | { |
| 2064 | djSP; |
| 2065 | register I32 match; |
| 2066 | |
| 2067 | if (multiline) |
| 2068 | op = op->op_next; /* can't assume anything */ |
| 2069 | else { |
| 2070 | match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255; |
| 2071 | match -= cCOP->uop.scop.scop_offset; |
| 2072 | if (match < 0) |
| 2073 | match = 0; |
| 2074 | else if (match > cCOP->uop.scop.scop_max) |
| 2075 | match = cCOP->uop.scop.scop_max; |
| 2076 | op = cCOP->uop.scop.scop_next[match]; |
| 2077 | } |
| 2078 | RETURNOP(op); |
| 2079 | } |
| 2080 | #endif |
| 2081 | |
| 2082 | /* Eval. */ |
| 2083 | |
| 2084 | STATIC void |
| 2085 | save_lines(AV *array, SV *sv) |
| 2086 | { |
| 2087 | register char *s = SvPVX(sv); |
| 2088 | register char *send = SvPVX(sv) + SvCUR(sv); |
| 2089 | register char *t; |
| 2090 | register I32 line = 1; |
| 2091 | |
| 2092 | while (s && s < send) { |
| 2093 | SV *tmpstr = NEWSV(85,0); |
| 2094 | |
| 2095 | sv_upgrade(tmpstr, SVt_PVMG); |
| 2096 | t = strchr(s, '\n'); |
| 2097 | if (t) |
| 2098 | t++; |
| 2099 | else |
| 2100 | t = send; |
| 2101 | |
| 2102 | sv_setpvn(tmpstr, s, t - s); |
| 2103 | av_store(array, line++, tmpstr); |
| 2104 | s = t; |
| 2105 | } |
| 2106 | } |
| 2107 | |
| 2108 | STATIC OP * |
| 2109 | docatch(OP *o) |
| 2110 | { |
| 2111 | dTHR; |
| 2112 | int ret; |
| 2113 | OP *oldop = op; |
| 2114 | dJMPENV; |
| 2115 | |
| 2116 | op = o; |
| 2117 | #ifdef DEBUGGING |
| 2118 | assert(CATCH_GET == TRUE); |
| 2119 | DEBUG_l(deb("Setting up local jumplevel %p, was %p\n", &cur_env, top_env)); |
| 2120 | #endif |
| 2121 | JMPENV_PUSH(ret); |
| 2122 | switch (ret) { |
| 2123 | default: /* topmost level handles it */ |
| 2124 | JMPENV_POP; |
| 2125 | op = oldop; |
| 2126 | JMPENV_JUMP(ret); |
| 2127 | /* NOTREACHED */ |
| 2128 | case 3: |
| 2129 | if (!restartop) { |
| 2130 | PerlIO_printf(PerlIO_stderr(), "panic: restartop\n"); |
| 2131 | break; |
| 2132 | } |
| 2133 | op = restartop; |
| 2134 | restartop = 0; |
| 2135 | /* FALL THROUGH */ |
| 2136 | case 0: |
| 2137 | CALLRUNOPS(); |
| 2138 | break; |
| 2139 | } |
| 2140 | JMPENV_POP; |
| 2141 | op = oldop; |
| 2142 | return Nullop; |
| 2143 | } |
| 2144 | |
| 2145 | OP * |
| 2146 | sv_compile_2op(SV *sv, OP** startop, char *code, AV** avp) |
| 2147 | /* sv Text to convert to OP tree. */ |
| 2148 | /* startop op_free() this to undo. */ |
| 2149 | /* code Short string id of the caller. */ |
| 2150 | { |
| 2151 | dSP; /* Make POPBLOCK work. */ |
| 2152 | PERL_CONTEXT *cx; |
| 2153 | SV **newsp; |
| 2154 | I32 gimme = 0; /* SUSPECT - INITIALZE TO WHAT? NI-S */ |
| 2155 | I32 optype; |
| 2156 | OP dummy; |
| 2157 | OP *oop = op, *rop; |
| 2158 | char tmpbuf[TYPE_DIGITS(long) + 12 + 10]; |
| 2159 | char *safestr; |
| 2160 | |
| 2161 | ENTER; |
| 2162 | lex_start(sv); |
| 2163 | SAVETMPS; |
| 2164 | /* switch to eval mode */ |
| 2165 | |
| 2166 | SAVESPTR(compiling.cop_filegv); |
| 2167 | SAVEI16(compiling.cop_line); |
| 2168 | sprintf(tmpbuf, "_<(%.10s_eval %lu)", code, (unsigned long)++evalseq); |
| 2169 | compiling.cop_filegv = gv_fetchfile(tmpbuf+2); |
| 2170 | compiling.cop_line = 1; |
| 2171 | /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up |
| 2172 | deleting the eval's FILEGV from the stash before gv_check() runs |
| 2173 | (i.e. before run-time proper). To work around the coredump that |
| 2174 | ensues, we always turn GvMULTI_on for any globals that were |
| 2175 | introduced within evals. See force_ident(). GSAR 96-10-12 */ |
| 2176 | safestr = savepv(tmpbuf); |
| 2177 | SAVEDELETE(defstash, safestr, strlen(safestr)); |
| 2178 | SAVEI32(hints); |
| 2179 | #ifdef OP_IN_REGISTER |
| 2180 | opsave = op; |
| 2181 | #else |
| 2182 | SAVEPPTR(op); |
| 2183 | #endif |
| 2184 | hints = 0; |
| 2185 | |
| 2186 | op = &dummy; |
| 2187 | op->op_type = 0; /* Avoid uninit warning. */ |
| 2188 | op->op_flags = 0; /* Avoid uninit warning. */ |
| 2189 | PUSHBLOCK(cx, CXt_EVAL, SP); |
| 2190 | PUSHEVAL(cx, 0, compiling.cop_filegv); |
| 2191 | rop = doeval(G_SCALAR, startop); |
| 2192 | POPBLOCK(cx,curpm); |
| 2193 | POPEVAL(cx); |
| 2194 | |
| 2195 | (*startop)->op_type = OP_NULL; |
| 2196 | (*startop)->op_ppaddr = ppaddr[OP_NULL]; |
| 2197 | lex_end(); |
| 2198 | *avp = (AV*)SvREFCNT_inc(comppad); |
| 2199 | LEAVE; |
| 2200 | #ifdef OP_IN_REGISTER |
| 2201 | op = opsave; |
| 2202 | #endif |
| 2203 | return rop; |
| 2204 | } |
| 2205 | |
| 2206 | /* With USE_THREADS, eval_owner must be held on entry to doeval */ |
| 2207 | STATIC OP * |
| 2208 | doeval(int gimme, OP** startop) |
| 2209 | { |
| 2210 | dSP; |
| 2211 | OP *saveop = op; |
| 2212 | HV *newstash; |
| 2213 | CV *caller; |
| 2214 | AV* comppadlist; |
| 2215 | I32 i; |
| 2216 | |
| 2217 | in_eval = 1; |
| 2218 | |
| 2219 | PUSHMARK(SP); |
| 2220 | |
| 2221 | /* set up a scratch pad */ |
| 2222 | |
| 2223 | SAVEI32(padix); |
| 2224 | SAVESPTR(curpad); |
| 2225 | SAVESPTR(comppad); |
| 2226 | SAVESPTR(comppad_name); |
| 2227 | SAVEI32(comppad_name_fill); |
| 2228 | SAVEI32(min_intro_pending); |
| 2229 | SAVEI32(max_intro_pending); |
| 2230 | |
| 2231 | caller = compcv; |
| 2232 | for (i = cxstack_ix - 1; i >= 0; i--) { |
| 2233 | PERL_CONTEXT *cx = &cxstack[i]; |
| 2234 | if (cx->cx_type == CXt_EVAL) |
| 2235 | break; |
| 2236 | else if (cx->cx_type == CXt_SUB) { |
| 2237 | caller = cx->blk_sub.cv; |
| 2238 | break; |
| 2239 | } |
| 2240 | } |
| 2241 | |
| 2242 | SAVESPTR(compcv); |
| 2243 | compcv = (CV*)NEWSV(1104,0); |
| 2244 | sv_upgrade((SV *)compcv, SVt_PVCV); |
| 2245 | CvUNIQUE_on(compcv); |
| 2246 | #ifdef USE_THREADS |
| 2247 | CvOWNER(compcv) = 0; |
| 2248 | New(666, CvMUTEXP(compcv), 1, perl_mutex); |
| 2249 | MUTEX_INIT(CvMUTEXP(compcv)); |
| 2250 | #endif /* USE_THREADS */ |
| 2251 | |
| 2252 | comppad = newAV(); |
| 2253 | av_push(comppad, Nullsv); |
| 2254 | curpad = AvARRAY(comppad); |
| 2255 | comppad_name = newAV(); |
| 2256 | comppad_name_fill = 0; |
| 2257 | min_intro_pending = 0; |
| 2258 | padix = 0; |
| 2259 | #ifdef USE_THREADS |
| 2260 | av_store(comppad_name, 0, newSVpv("@_", 2)); |
| 2261 | curpad[0] = (SV*)newAV(); |
| 2262 | SvPADMY_on(curpad[0]); /* XXX Needed? */ |
| 2263 | #endif /* USE_THREADS */ |
| 2264 | |
| 2265 | comppadlist = newAV(); |
| 2266 | AvREAL_off(comppadlist); |
| 2267 | av_store(comppadlist, 0, (SV*)comppad_name); |
| 2268 | av_store(comppadlist, 1, (SV*)comppad); |
| 2269 | CvPADLIST(compcv) = comppadlist; |
| 2270 | |
| 2271 | if (!saveop || saveop->op_type != OP_REQUIRE) |
| 2272 | CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(caller); |
| 2273 | |
| 2274 | SAVEFREESV(compcv); |
| 2275 | |
| 2276 | /* make sure we compile in the right package */ |
| 2277 | |
| 2278 | newstash = curcop->cop_stash; |
| 2279 | if (curstash != newstash) { |
| 2280 | SAVESPTR(curstash); |
| 2281 | curstash = newstash; |
| 2282 | } |
| 2283 | SAVESPTR(beginav); |
| 2284 | beginav = newAV(); |
| 2285 | SAVEFREESV(beginav); |
| 2286 | |
| 2287 | /* try to compile it */ |
| 2288 | |
| 2289 | eval_root = Nullop; |
| 2290 | error_count = 0; |
| 2291 | curcop = &compiling; |
| 2292 | curcop->cop_arybase = 0; |
| 2293 | SvREFCNT_dec(rs); |
| 2294 | rs = newSVpv("\n", 1); |
| 2295 | if (saveop && saveop->op_flags & OPf_SPECIAL) |
| 2296 | in_eval |= 4; |
| 2297 | else |
| 2298 | sv_setpv(ERRSV,""); |
| 2299 | if (yyparse() || error_count || !eval_root) { |
| 2300 | SV **newsp; |
| 2301 | I32 gimme; |
| 2302 | PERL_CONTEXT *cx; |
| 2303 | I32 optype = 0; /* Might be reset by POPEVAL. */ |
| 2304 | |
| 2305 | op = saveop; |
| 2306 | if (eval_root) { |
| 2307 | op_free(eval_root); |
| 2308 | eval_root = Nullop; |
| 2309 | } |
| 2310 | SP = stack_base + POPMARK; /* pop original mark */ |
| 2311 | if (!startop) { |
| 2312 | POPBLOCK(cx,curpm); |
| 2313 | POPEVAL(cx); |
| 2314 | pop_return(); |
| 2315 | } |
| 2316 | lex_end(); |
| 2317 | LEAVE; |
| 2318 | if (optype == OP_REQUIRE) { |
| 2319 | char* msg = SvPVx(ERRSV, na); |
| 2320 | DIE("%s", *msg ? msg : "Compilation failed in require"); |
| 2321 | } else if (startop) { |
| 2322 | char* msg = SvPVx(ERRSV, na); |
| 2323 | |
| 2324 | POPBLOCK(cx,curpm); |
| 2325 | POPEVAL(cx); |
| 2326 | croak("%sCompilation failed in regexp", (*msg ? msg : "Unknown error\n")); |
| 2327 | } |
| 2328 | SvREFCNT_dec(rs); |
| 2329 | rs = SvREFCNT_inc(nrs); |
| 2330 | #ifdef USE_THREADS |
| 2331 | MUTEX_LOCK(&eval_mutex); |
| 2332 | eval_owner = 0; |
| 2333 | COND_SIGNAL(&eval_cond); |
| 2334 | MUTEX_UNLOCK(&eval_mutex); |
| 2335 | #endif /* USE_THREADS */ |
| 2336 | RETPUSHUNDEF; |
| 2337 | } |
| 2338 | SvREFCNT_dec(rs); |
| 2339 | rs = SvREFCNT_inc(nrs); |
| 2340 | compiling.cop_line = 0; |
| 2341 | if (startop) { |
| 2342 | *startop = eval_root; |
| 2343 | SvREFCNT_dec(CvOUTSIDE(compcv)); |
| 2344 | CvOUTSIDE(compcv) = Nullcv; |
| 2345 | } else |
| 2346 | SAVEFREEOP(eval_root); |
| 2347 | if (gimme & G_VOID) |
| 2348 | scalarvoid(eval_root); |
| 2349 | else if (gimme & G_ARRAY) |
| 2350 | list(eval_root); |
| 2351 | else |
| 2352 | scalar(eval_root); |
| 2353 | |
| 2354 | DEBUG_x(dump_eval()); |
| 2355 | |
| 2356 | /* Register with debugger: */ |
| 2357 | if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) { |
| 2358 | CV *cv = perl_get_cv("DB::postponed", FALSE); |
| 2359 | if (cv) { |
| 2360 | dSP; |
| 2361 | PUSHMARK(SP); |
| 2362 | XPUSHs((SV*)compiling.cop_filegv); |
| 2363 | PUTBACK; |
| 2364 | perl_call_sv((SV*)cv, G_DISCARD); |
| 2365 | } |
| 2366 | } |
| 2367 | |
| 2368 | /* compiled okay, so do it */ |
| 2369 | |
| 2370 | CvDEPTH(compcv) = 1; |
| 2371 | SP = stack_base + POPMARK; /* pop original mark */ |
| 2372 | op = saveop; /* The caller may need it. */ |
| 2373 | #ifdef USE_THREADS |
| 2374 | MUTEX_LOCK(&eval_mutex); |
| 2375 | eval_owner = 0; |
| 2376 | COND_SIGNAL(&eval_cond); |
| 2377 | MUTEX_UNLOCK(&eval_mutex); |
| 2378 | #endif /* USE_THREADS */ |
| 2379 | |
| 2380 | RETURNOP(eval_start); |
| 2381 | } |
| 2382 | |
| 2383 | PP(pp_require) |
| 2384 | { |
| 2385 | djSP; |
| 2386 | register PERL_CONTEXT *cx; |
| 2387 | SV *sv; |
| 2388 | char *name; |
| 2389 | STRLEN len; |
| 2390 | char *tryname; |
| 2391 | SV *namesv = Nullsv; |
| 2392 | SV** svp; |
| 2393 | I32 gimme = G_SCALAR; |
| 2394 | PerlIO *tryrsfp = 0; |
| 2395 | |
| 2396 | sv = POPs; |
| 2397 | if (SvNIOKp(sv) && !SvPOKp(sv)) { |
| 2398 | SET_NUMERIC_STANDARD(); |
| 2399 | if (atof(patchlevel) + 0.00000999 < SvNV(sv)) |
| 2400 | DIE("Perl %s required--this is only version %s, stopped", |
| 2401 | SvPV(sv,na),patchlevel); |
| 2402 | RETPUSHYES; |
| 2403 | } |
| 2404 | name = SvPV(sv, len); |
| 2405 | if (!(name && len > 0 && *name)) |
| 2406 | DIE("Null filename used"); |
| 2407 | TAINT_PROPER("require"); |
| 2408 | if (op->op_type == OP_REQUIRE && |
| 2409 | (svp = hv_fetch(GvHVn(incgv), name, len, 0)) && |
| 2410 | *svp != &sv_undef) |
| 2411 | RETPUSHYES; |
| 2412 | |
| 2413 | /* prepare to compile file */ |
| 2414 | |
| 2415 | if (*name == '/' || |
| 2416 | (*name == '.' && |
| 2417 | (name[1] == '/' || |
| 2418 | (name[1] == '.' && name[2] == '/'))) |
| 2419 | #ifdef DOSISH |
| 2420 | || (name[0] && name[1] == ':') |
| 2421 | #endif |
| 2422 | #ifdef WIN32 |
| 2423 | || (name[0] == '\\' && name[1] == '\\') /* UNC path */ |
| 2424 | #endif |
| 2425 | #ifdef VMS |
| 2426 | || (strchr(name,':') || ((*name == '[' || *name == '<') && |
| 2427 | (isALNUM(name[1]) || strchr("$-_]>",name[1])))) |
| 2428 | #endif |
| 2429 | ) |
| 2430 | { |
| 2431 | tryname = name; |
| 2432 | tryrsfp = PerlIO_open(name,PERL_SCRIPT_MODE); |
| 2433 | } |
| 2434 | else { |
| 2435 | AV *ar = GvAVn(incgv); |
| 2436 | I32 i; |
| 2437 | #ifdef VMS |
| 2438 | char *unixname; |
| 2439 | if ((unixname = tounixspec(name, Nullch)) != Nullch) |
| 2440 | #endif |
| 2441 | { |
| 2442 | namesv = NEWSV(806, 0); |
| 2443 | for (i = 0; i <= AvFILL(ar); i++) { |
| 2444 | char *dir = SvPVx(*av_fetch(ar, i, TRUE), na); |
| 2445 | #ifdef VMS |
| 2446 | char *unixdir; |
| 2447 | if ((unixdir = tounixpath(dir, Nullch)) == Nullch) |
| 2448 | continue; |
| 2449 | sv_setpv(namesv, unixdir); |
| 2450 | sv_catpv(namesv, unixname); |
| 2451 | #else |
| 2452 | sv_setpvf(namesv, "%s/%s", dir, name); |
| 2453 | #endif |
| 2454 | tryname = SvPVX(namesv); |
| 2455 | tryrsfp = PerlIO_open(tryname, PERL_SCRIPT_MODE); |
| 2456 | if (tryrsfp) { |
| 2457 | if (tryname[0] == '.' && tryname[1] == '/') |
| 2458 | tryname += 2; |
| 2459 | break; |
| 2460 | } |
| 2461 | } |
| 2462 | } |
| 2463 | } |
| 2464 | SAVESPTR(compiling.cop_filegv); |
| 2465 | compiling.cop_filegv = gv_fetchfile(tryrsfp ? tryname : name); |
| 2466 | SvREFCNT_dec(namesv); |
| 2467 | if (!tryrsfp) { |
| 2468 | if (op->op_type == OP_REQUIRE) { |
| 2469 | SV *msg = sv_2mortal(newSVpvf("Can't locate %s in @INC", name)); |
| 2470 | SV *dirmsgsv = NEWSV(0, 0); |
| 2471 | AV *ar = GvAVn(incgv); |
| 2472 | I32 i; |
| 2473 | if (instr(SvPVX(msg), ".h ")) |
| 2474 | sv_catpv(msg, " (change .h to .ph maybe?)"); |
| 2475 | if (instr(SvPVX(msg), ".ph ")) |
| 2476 | sv_catpv(msg, " (did you run h2ph?)"); |
| 2477 | sv_catpv(msg, " (@INC contains:"); |
| 2478 | for (i = 0; i <= AvFILL(ar); i++) { |
| 2479 | char *dir = SvPVx(*av_fetch(ar, i, TRUE), na); |
| 2480 | sv_setpvf(dirmsgsv, " %s", dir); |
| 2481 | sv_catsv(msg, dirmsgsv); |
| 2482 | } |
| 2483 | sv_catpvn(msg, ")", 1); |
| 2484 | SvREFCNT_dec(dirmsgsv); |
| 2485 | DIE("%_", msg); |
| 2486 | } |
| 2487 | |
| 2488 | RETPUSHUNDEF; |
| 2489 | } |
| 2490 | |
| 2491 | /* Assume success here to prevent recursive requirement. */ |
| 2492 | (void)hv_store(GvHVn(incgv), name, strlen(name), |
| 2493 | newSVsv(GvSV(compiling.cop_filegv)), 0 ); |
| 2494 | |
| 2495 | ENTER; |
| 2496 | SAVETMPS; |
| 2497 | lex_start(sv_2mortal(newSVpv("",0))); |
| 2498 | if (rsfp_filters){ |
| 2499 | save_aptr(&rsfp_filters); |
| 2500 | rsfp_filters = NULL; |
| 2501 | } |
| 2502 | |
| 2503 | rsfp = tryrsfp; |
| 2504 | name = savepv(name); |
| 2505 | SAVEFREEPV(name); |
| 2506 | SAVEI32(hints); |
| 2507 | hints = 0; |
| 2508 | |
| 2509 | /* switch to eval mode */ |
| 2510 | |
| 2511 | push_return(op->op_next); |
| 2512 | PUSHBLOCK(cx, CXt_EVAL, SP); |
| 2513 | PUSHEVAL(cx, name, compiling.cop_filegv); |
| 2514 | |
| 2515 | compiling.cop_line = 0; |
| 2516 | |
| 2517 | PUTBACK; |
| 2518 | #ifdef USE_THREADS |
| 2519 | MUTEX_LOCK(&eval_mutex); |
| 2520 | if (eval_owner && eval_owner != thr) |
| 2521 | while (eval_owner) |
| 2522 | COND_WAIT(&eval_cond, &eval_mutex); |
| 2523 | eval_owner = thr; |
| 2524 | MUTEX_UNLOCK(&eval_mutex); |
| 2525 | #endif /* USE_THREADS */ |
| 2526 | return DOCATCH(doeval(G_SCALAR, NULL)); |
| 2527 | } |
| 2528 | |
| 2529 | PP(pp_dofile) |
| 2530 | { |
| 2531 | return pp_require(ARGS); |
| 2532 | } |
| 2533 | |
| 2534 | PP(pp_entereval) |
| 2535 | { |
| 2536 | djSP; |
| 2537 | register PERL_CONTEXT *cx; |
| 2538 | dPOPss; |
| 2539 | I32 gimme = GIMME_V, was = sub_generation; |
| 2540 | char tmpbuf[TYPE_DIGITS(long) + 12]; |
| 2541 | char *safestr; |
| 2542 | STRLEN len; |
| 2543 | OP *ret; |
| 2544 | |
| 2545 | if (!SvPV(sv,len) || !len) |
| 2546 | RETPUSHUNDEF; |
| 2547 | TAINT_PROPER("eval"); |
| 2548 | |
| 2549 | ENTER; |
| 2550 | lex_start(sv); |
| 2551 | SAVETMPS; |
| 2552 | |
| 2553 | /* switch to eval mode */ |
| 2554 | |
| 2555 | SAVESPTR(compiling.cop_filegv); |
| 2556 | sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++evalseq); |
| 2557 | compiling.cop_filegv = gv_fetchfile(tmpbuf+2); |
| 2558 | compiling.cop_line = 1; |
| 2559 | /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up |
| 2560 | deleting the eval's FILEGV from the stash before gv_check() runs |
| 2561 | (i.e. before run-time proper). To work around the coredump that |
| 2562 | ensues, we always turn GvMULTI_on for any globals that were |
| 2563 | introduced within evals. See force_ident(). GSAR 96-10-12 */ |
| 2564 | safestr = savepv(tmpbuf); |
| 2565 | SAVEDELETE(defstash, safestr, strlen(safestr)); |
| 2566 | SAVEI32(hints); |
| 2567 | hints = op->op_targ; |
| 2568 | |
| 2569 | push_return(op->op_next); |
| 2570 | PUSHBLOCK(cx, CXt_EVAL, SP); |
| 2571 | PUSHEVAL(cx, 0, compiling.cop_filegv); |
| 2572 | |
| 2573 | /* prepare to compile string */ |
| 2574 | |
| 2575 | if (PERLDB_LINE && curstash != debstash) |
| 2576 | save_lines(GvAV(compiling.cop_filegv), linestr); |
| 2577 | PUTBACK; |
| 2578 | #ifdef USE_THREADS |
| 2579 | MUTEX_LOCK(&eval_mutex); |
| 2580 | if (eval_owner && eval_owner != thr) |
| 2581 | while (eval_owner) |
| 2582 | COND_WAIT(&eval_cond, &eval_mutex); |
| 2583 | eval_owner = thr; |
| 2584 | MUTEX_UNLOCK(&eval_mutex); |
| 2585 | #endif /* USE_THREADS */ |
| 2586 | ret = doeval(gimme, NULL); |
| 2587 | if (PERLDB_INTER && was != sub_generation /* Some subs defined here. */ |
| 2588 | && ret != op->op_next) { /* Successive compilation. */ |
| 2589 | strcpy(safestr, "_<(eval )"); /* Anything fake and short. */ |
| 2590 | } |
| 2591 | return DOCATCH(ret); |
| 2592 | } |
| 2593 | |
| 2594 | PP(pp_leaveeval) |
| 2595 | { |
| 2596 | djSP; |
| 2597 | register SV **mark; |
| 2598 | SV **newsp; |
| 2599 | PMOP *newpm; |
| 2600 | I32 gimme; |
| 2601 | register PERL_CONTEXT *cx; |
| 2602 | OP *retop; |
| 2603 | U8 save_flags = op -> op_flags; |
| 2604 | I32 optype; |
| 2605 | |
| 2606 | POPBLOCK(cx,newpm); |
| 2607 | POPEVAL(cx); |
| 2608 | retop = pop_return(); |
| 2609 | |
| 2610 | TAINT_NOT; |
| 2611 | if (gimme == G_VOID) |
| 2612 | MARK = newsp; |
| 2613 | else if (gimme == G_SCALAR) { |
| 2614 | MARK = newsp + 1; |
| 2615 | if (MARK <= SP) { |
| 2616 | if (SvFLAGS(TOPs) & SVs_TEMP) |
| 2617 | *MARK = TOPs; |
| 2618 | else |
| 2619 | *MARK = sv_mortalcopy(TOPs); |
| 2620 | } |
| 2621 | else { |
| 2622 | MEXTEND(mark,0); |
| 2623 | *MARK = &sv_undef; |
| 2624 | } |
| 2625 | } |
| 2626 | else { |
| 2627 | /* in case LEAVE wipes old return values */ |
| 2628 | for (mark = newsp + 1; mark <= SP; mark++) { |
| 2629 | if (!(SvFLAGS(*mark) & SVs_TEMP)) { |
| 2630 | *mark = sv_mortalcopy(*mark); |
| 2631 | TAINT_NOT; /* Each item is independent */ |
| 2632 | } |
| 2633 | } |
| 2634 | } |
| 2635 | curpm = newpm; /* Don't pop $1 et al till now */ |
| 2636 | |
| 2637 | /* |
| 2638 | * Closures mentioned at top level of eval cannot be referenced |
| 2639 | * again, and their presence indirectly causes a memory leak. |
| 2640 | * (Note that the fact that compcv and friends are still set here |
| 2641 | * is, AFAIK, an accident.) --Chip |
| 2642 | */ |
| 2643 | if (AvFILLp(comppad_name) >= 0) { |
| 2644 | SV **svp = AvARRAY(comppad_name); |
| 2645 | I32 ix; |
| 2646 | for (ix = AvFILLp(comppad_name); ix >= 0; ix--) { |
| 2647 | SV *sv = svp[ix]; |
| 2648 | if (sv && sv != &sv_undef && *SvPVX(sv) == '&') { |
| 2649 | SvREFCNT_dec(sv); |
| 2650 | svp[ix] = &sv_undef; |
| 2651 | |
| 2652 | sv = curpad[ix]; |
| 2653 | if (CvCLONE(sv)) { |
| 2654 | SvREFCNT_dec(CvOUTSIDE(sv)); |
| 2655 | CvOUTSIDE(sv) = Nullcv; |
| 2656 | } |
| 2657 | else { |
| 2658 | SvREFCNT_dec(sv); |
| 2659 | sv = NEWSV(0,0); |
| 2660 | SvPADTMP_on(sv); |
| 2661 | curpad[ix] = sv; |
| 2662 | } |
| 2663 | } |
| 2664 | } |
| 2665 | } |
| 2666 | |
| 2667 | #ifdef DEBUGGING |
| 2668 | assert(CvDEPTH(compcv) == 1); |
| 2669 | #endif |
| 2670 | CvDEPTH(compcv) = 0; |
| 2671 | lex_end(); |
| 2672 | |
| 2673 | if (optype == OP_REQUIRE && |
| 2674 | !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp)) |
| 2675 | { |
| 2676 | /* Unassume the success we assumed earlier. */ |
| 2677 | char *name = cx->blk_eval.old_name; |
| 2678 | (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD); |
| 2679 | retop = die("%s did not return a true value", name); |
| 2680 | /* die_where() did LEAVE, or we won't be here */ |
| 2681 | } |
| 2682 | else { |
| 2683 | LEAVE; |
| 2684 | if (!(save_flags & OPf_SPECIAL)) |
| 2685 | sv_setpv(ERRSV,""); |
| 2686 | } |
| 2687 | |
| 2688 | RETURNOP(retop); |
| 2689 | } |
| 2690 | |
| 2691 | PP(pp_entertry) |
| 2692 | { |
| 2693 | djSP; |
| 2694 | register PERL_CONTEXT *cx; |
| 2695 | I32 gimme = GIMME_V; |
| 2696 | |
| 2697 | ENTER; |
| 2698 | SAVETMPS; |
| 2699 | |
| 2700 | push_return(cLOGOP->op_other->op_next); |
| 2701 | PUSHBLOCK(cx, CXt_EVAL, SP); |
| 2702 | PUSHEVAL(cx, 0, 0); |
| 2703 | eval_root = op; /* Only needed so that goto works right. */ |
| 2704 | |
| 2705 | in_eval = 1; |
| 2706 | sv_setpv(ERRSV,""); |
| 2707 | PUTBACK; |
| 2708 | return DOCATCH(op->op_next); |
| 2709 | } |
| 2710 | |
| 2711 | PP(pp_leavetry) |
| 2712 | { |
| 2713 | djSP; |
| 2714 | register SV **mark; |
| 2715 | SV **newsp; |
| 2716 | PMOP *newpm; |
| 2717 | I32 gimme; |
| 2718 | register PERL_CONTEXT *cx; |
| 2719 | I32 optype; |
| 2720 | |
| 2721 | POPBLOCK(cx,newpm); |
| 2722 | POPEVAL(cx); |
| 2723 | pop_return(); |
| 2724 | |
| 2725 | TAINT_NOT; |
| 2726 | if (gimme == G_VOID) |
| 2727 | SP = newsp; |
| 2728 | else if (gimme == G_SCALAR) { |
| 2729 | MARK = newsp + 1; |
| 2730 | if (MARK <= SP) { |
| 2731 | if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP)) |
| 2732 | *MARK = TOPs; |
| 2733 | else |
| 2734 | *MARK = sv_mortalcopy(TOPs); |
| 2735 | } |
| 2736 | else { |
| 2737 | MEXTEND(mark,0); |
| 2738 | *MARK = &sv_undef; |
| 2739 | } |
| 2740 | SP = MARK; |
| 2741 | } |
| 2742 | else { |
| 2743 | /* in case LEAVE wipes old return values */ |
| 2744 | for (mark = newsp + 1; mark <= SP; mark++) { |
| 2745 | if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) { |
| 2746 | *mark = sv_mortalcopy(*mark); |
| 2747 | TAINT_NOT; /* Each item is independent */ |
| 2748 | } |
| 2749 | } |
| 2750 | } |
| 2751 | curpm = newpm; /* Don't pop $1 et al till now */ |
| 2752 | |
| 2753 | LEAVE; |
| 2754 | sv_setpv(ERRSV,""); |
| 2755 | RETURN; |
| 2756 | } |
| 2757 | |
| 2758 | STATIC void |
| 2759 | doparseform(SV *sv) |
| 2760 | { |
| 2761 | STRLEN len; |
| 2762 | register char *s = SvPV_force(sv, len); |
| 2763 | register char *send = s + len; |
| 2764 | register char *base; |
| 2765 | register I32 skipspaces = 0; |
| 2766 | bool noblank; |
| 2767 | bool repeat; |
| 2768 | bool postspace = FALSE; |
| 2769 | U16 *fops; |
| 2770 | register U16 *fpc; |
| 2771 | U16 *linepc; |
| 2772 | register I32 arg; |
| 2773 | bool ischop; |
| 2774 | |
| 2775 | if (len == 0) |
| 2776 | croak("Null picture in formline"); |
| 2777 | |
| 2778 | New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */ |
| 2779 | fpc = fops; |
| 2780 | |
| 2781 | if (s < send) { |
| 2782 | linepc = fpc; |
| 2783 | *fpc++ = FF_LINEMARK; |
| 2784 | noblank = repeat = FALSE; |
| 2785 | base = s; |
| 2786 | } |
| 2787 | |
| 2788 | while (s <= send) { |
| 2789 | switch (*s++) { |
| 2790 | default: |
| 2791 | skipspaces = 0; |
| 2792 | continue; |
| 2793 | |
| 2794 | case '~': |
| 2795 | if (*s == '~') { |
| 2796 | repeat = TRUE; |
| 2797 | *s = ' '; |
| 2798 | } |
| 2799 | noblank = TRUE; |
| 2800 | s[-1] = ' '; |
| 2801 | /* FALL THROUGH */ |
| 2802 | case ' ': case '\t': |
| 2803 | skipspaces++; |
| 2804 | continue; |
| 2805 | |
| 2806 | case '\n': case 0: |
| 2807 | arg = s - base; |
| 2808 | skipspaces++; |
| 2809 | arg -= skipspaces; |
| 2810 | if (arg) { |
| 2811 | if (postspace) |
| 2812 | *fpc++ = FF_SPACE; |
| 2813 | *fpc++ = FF_LITERAL; |
| 2814 | *fpc++ = arg; |
| 2815 | } |
| 2816 | postspace = FALSE; |
| 2817 | if (s <= send) |
| 2818 | skipspaces--; |
| 2819 | if (skipspaces) { |
| 2820 | *fpc++ = FF_SKIP; |
| 2821 | *fpc++ = skipspaces; |
| 2822 | } |
| 2823 | skipspaces = 0; |
| 2824 | if (s <= send) |
| 2825 | *fpc++ = FF_NEWLINE; |
| 2826 | if (noblank) { |
| 2827 | *fpc++ = FF_BLANK; |
| 2828 | if (repeat) |
| 2829 | arg = fpc - linepc + 1; |
| 2830 | else |
| 2831 | arg = 0; |
| 2832 | *fpc++ = arg; |
| 2833 | } |
| 2834 | if (s < send) { |
| 2835 | linepc = fpc; |
| 2836 | *fpc++ = FF_LINEMARK; |
| 2837 | noblank = repeat = FALSE; |
| 2838 | base = s; |
| 2839 | } |
| 2840 | else |
| 2841 | s++; |
| 2842 | continue; |
| 2843 | |
| 2844 | case '@': |
| 2845 | case '^': |
| 2846 | ischop = s[-1] == '^'; |
| 2847 | |
| 2848 | if (postspace) { |
| 2849 | *fpc++ = FF_SPACE; |
| 2850 | postspace = FALSE; |
| 2851 | } |
| 2852 | arg = (s - base) - 1; |
| 2853 | if (arg) { |
| 2854 | *fpc++ = FF_LITERAL; |
| 2855 | *fpc++ = arg; |
| 2856 | } |
| 2857 | |
| 2858 | base = s - 1; |
| 2859 | *fpc++ = FF_FETCH; |
| 2860 | if (*s == '*') { |
| 2861 | s++; |
| 2862 | *fpc++ = 0; |
| 2863 | *fpc++ = FF_LINEGLOB; |
| 2864 | } |
| 2865 | else if (*s == '#' || (*s == '.' && s[1] == '#')) { |
| 2866 | arg = ischop ? 512 : 0; |
| 2867 | base = s - 1; |
| 2868 | while (*s == '#') |
| 2869 | s++; |
| 2870 | if (*s == '.') { |
| 2871 | char *f; |
| 2872 | s++; |
| 2873 | f = s; |
| 2874 | while (*s == '#') |
| 2875 | s++; |
| 2876 | arg |= 256 + (s - f); |
| 2877 | } |
| 2878 | *fpc++ = s - base; /* fieldsize for FETCH */ |
| 2879 | *fpc++ = FF_DECIMAL; |
| 2880 | *fpc++ = arg; |
| 2881 | } |
| 2882 | else { |
| 2883 | I32 prespace = 0; |
| 2884 | bool ismore = FALSE; |
| 2885 | |
| 2886 | if (*s == '>') { |
| 2887 | while (*++s == '>') ; |
| 2888 | prespace = FF_SPACE; |
| 2889 | } |
| 2890 | else if (*s == '|') { |
| 2891 | while (*++s == '|') ; |
| 2892 | prespace = FF_HALFSPACE; |
| 2893 | postspace = TRUE; |
| 2894 | } |
| 2895 | else { |
| 2896 | if (*s == '<') |
| 2897 | while (*++s == '<') ; |
| 2898 | postspace = TRUE; |
| 2899 | } |
| 2900 | if (*s == '.' && s[1] == '.' && s[2] == '.') { |
| 2901 | s += 3; |
| 2902 | ismore = TRUE; |
| 2903 | } |
| 2904 | *fpc++ = s - base; /* fieldsize for FETCH */ |
| 2905 | |
| 2906 | *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL; |
| 2907 | |
| 2908 | if (prespace) |
| 2909 | *fpc++ = prespace; |
| 2910 | *fpc++ = FF_ITEM; |
| 2911 | if (ismore) |
| 2912 | *fpc++ = FF_MORE; |
| 2913 | if (ischop) |
| 2914 | *fpc++ = FF_CHOP; |
| 2915 | } |
| 2916 | base = s; |
| 2917 | skipspaces = 0; |
| 2918 | continue; |
| 2919 | } |
| 2920 | } |
| 2921 | *fpc++ = FF_END; |
| 2922 | |
| 2923 | arg = fpc - fops; |
| 2924 | { /* need to jump to the next word */ |
| 2925 | int z; |
| 2926 | z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN; |
| 2927 | SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4); |
| 2928 | s = SvPVX(sv) + SvCUR(sv) + z; |
| 2929 | } |
| 2930 | Copy(fops, s, arg, U16); |
| 2931 | Safefree(fops); |
| 2932 | sv_magic(sv, Nullsv, 'f', Nullch, 0); |
| 2933 | SvCOMPILED_on(sv); |
| 2934 | } |
| 2935 | |
| 2936 | /* |
| 2937 | * The rest of this file was derived from source code contributed |
| 2938 | * by Tom Horsley. |
| 2939 | * |
| 2940 | * NOTE: this code was derived from Tom Horsley's qsort replacement |
| 2941 | * and should not be confused with the original code. |
| 2942 | */ |
| 2943 | |
| 2944 | /* Copyright (C) Tom Horsley, 1997. All rights reserved. |
| 2945 | |
| 2946 | Permission granted to distribute under the same terms as perl which are |
| 2947 | (briefly): |
| 2948 | |
| 2949 | This program is free software; you can redistribute it and/or modify |
| 2950 | it under the terms of either: |
| 2951 | |
| 2952 | a) the GNU General Public License as published by the Free |
| 2953 | Software Foundation; either version 1, or (at your option) any |
| 2954 | later version, or |
| 2955 | |
| 2956 | b) the "Artistic License" which comes with this Kit. |
| 2957 | |
| 2958 | Details on the perl license can be found in the perl source code which |
| 2959 | may be located via the www.perl.com web page. |
| 2960 | |
| 2961 | This is the most wonderfulest possible qsort I can come up with (and |
| 2962 | still be mostly portable) My (limited) tests indicate it consistently |
| 2963 | does about 20% fewer calls to compare than does the qsort in the Visual |
| 2964 | C++ library, other vendors may vary. |
| 2965 | |
| 2966 | Some of the ideas in here can be found in "Algorithms" by Sedgewick, |
| 2967 | others I invented myself (or more likely re-invented since they seemed |
| 2968 | pretty obvious once I watched the algorithm operate for a while). |
| 2969 | |
| 2970 | Most of this code was written while watching the Marlins sweep the Giants |
| 2971 | in the 1997 National League Playoffs - no Braves fans allowed to use this |
| 2972 | code (just kidding :-). |
| 2973 | |
| 2974 | I realize that if I wanted to be true to the perl tradition, the only |
| 2975 | comment in this file would be something like: |
| 2976 | |
| 2977 | ...they shuffled back towards the rear of the line. 'No, not at the |
| 2978 | rear!' the slave-driver shouted. 'Three files up. And stay there... |
| 2979 | |
| 2980 | However, I really needed to violate that tradition just so I could keep |
| 2981 | track of what happens myself, not to mention some poor fool trying to |
| 2982 | understand this years from now :-). |
| 2983 | */ |
| 2984 | |
| 2985 | /* ********************************************************** Configuration */ |
| 2986 | |
| 2987 | #ifndef QSORT_ORDER_GUESS |
| 2988 | #define QSORT_ORDER_GUESS 2 /* Select doubling version of the netBSD trick */ |
| 2989 | #endif |
| 2990 | |
| 2991 | /* QSORT_MAX_STACK is the largest number of partitions that can be stacked up for |
| 2992 | future processing - a good max upper bound is log base 2 of memory size |
| 2993 | (32 on 32 bit machines, 64 on 64 bit machines, etc). In reality can |
| 2994 | safely be smaller than that since the program is taking up some space and |
| 2995 | most operating systems only let you grab some subset of contiguous |
| 2996 | memory (not to mention that you are normally sorting data larger than |
| 2997 | 1 byte element size :-). |
| 2998 | */ |
| 2999 | #ifndef QSORT_MAX_STACK |
| 3000 | #define QSORT_MAX_STACK 32 |
| 3001 | #endif |
| 3002 | |
| 3003 | /* QSORT_BREAK_EVEN is the size of the largest partition we should insertion sort. |
| 3004 | Anything bigger and we use qsort. If you make this too small, the qsort |
| 3005 | will probably break (or become less efficient), because it doesn't expect |
| 3006 | the middle element of a partition to be the same as the right or left - |
| 3007 | you have been warned). |
| 3008 | */ |
| 3009 | #ifndef QSORT_BREAK_EVEN |
| 3010 | #define QSORT_BREAK_EVEN 6 |
| 3011 | #endif |
| 3012 | |
| 3013 | /* ************************************************************* Data Types */ |
| 3014 | |
| 3015 | /* hold left and right index values of a partition waiting to be sorted (the |
| 3016 | partition includes both left and right - right is NOT one past the end or |
| 3017 | anything like that). |
| 3018 | */ |
| 3019 | struct partition_stack_entry { |
| 3020 | int left; |
| 3021 | int right; |
| 3022 | #ifdef QSORT_ORDER_GUESS |
| 3023 | int qsort_break_even; |
| 3024 | #endif |
| 3025 | }; |
| 3026 | |
| 3027 | /* ******************************************************* Shorthand Macros */ |
| 3028 | |
| 3029 | /* Note that these macros will be used from inside the qsort function where |
| 3030 | we happen to know that the variable 'elt_size' contains the size of an |
| 3031 | array element and the variable 'temp' points to enough space to hold a |
| 3032 | temp element and the variable 'array' points to the array being sorted |
| 3033 | and 'compare' is the pointer to the compare routine. |
| 3034 | |
| 3035 | Also note that there are very many highly architecture specific ways |
| 3036 | these might be sped up, but this is simply the most generally portable |
| 3037 | code I could think of. |
| 3038 | */ |
| 3039 | |
| 3040 | /* Return < 0 == 0 or > 0 as the value of elt1 is < elt2, == elt2, > elt2 |
| 3041 | */ |
| 3042 | #ifdef PERL_OBJECT |
| 3043 | #define qsort_cmp(elt1, elt2) \ |
| 3044 | ((this->*compare)(array[elt1], array[elt2])) |
| 3045 | #else |
| 3046 | #define qsort_cmp(elt1, elt2) \ |
| 3047 | ((*compare)(array[elt1], array[elt2])) |
| 3048 | #endif |
| 3049 | |
| 3050 | #ifdef QSORT_ORDER_GUESS |
| 3051 | #define QSORT_NOTICE_SWAP swapped++; |
| 3052 | #else |
| 3053 | #define QSORT_NOTICE_SWAP |
| 3054 | #endif |
| 3055 | |
| 3056 | /* swaps contents of array elements elt1, elt2. |
| 3057 | */ |
| 3058 | #define qsort_swap(elt1, elt2) \ |
| 3059 | STMT_START { \ |
| 3060 | QSORT_NOTICE_SWAP \ |
| 3061 | temp = array[elt1]; \ |
| 3062 | array[elt1] = array[elt2]; \ |
| 3063 | array[elt2] = temp; \ |
| 3064 | } STMT_END |
| 3065 | |
| 3066 | /* rotate contents of elt1, elt2, elt3 such that elt1 gets elt2, elt2 gets |
| 3067 | elt3 and elt3 gets elt1. |
| 3068 | */ |
| 3069 | #define qsort_rotate(elt1, elt2, elt3) \ |
| 3070 | STMT_START { \ |
| 3071 | QSORT_NOTICE_SWAP \ |
| 3072 | temp = array[elt1]; \ |
| 3073 | array[elt1] = array[elt2]; \ |
| 3074 | array[elt2] = array[elt3]; \ |
| 3075 | array[elt3] = temp; \ |
| 3076 | } STMT_END |
| 3077 | |
| 3078 | /* ************************************************************ Debug stuff */ |
| 3079 | |
| 3080 | #ifdef QSORT_DEBUG |
| 3081 | |
| 3082 | static void |
| 3083 | break_here() |
| 3084 | { |
| 3085 | return; /* good place to set a breakpoint */ |
| 3086 | } |
| 3087 | |
| 3088 | #define qsort_assert(t) (void)( (t) || (break_here(), 0) ) |
| 3089 | |
| 3090 | static void |
| 3091 | doqsort_all_asserts( |
| 3092 | void * array, |
| 3093 | size_t num_elts, |
| 3094 | size_t elt_size, |
| 3095 | int (*compare)(const void * elt1, const void * elt2), |
| 3096 | int pc_left, int pc_right, int u_left, int u_right) |
| 3097 | { |
| 3098 | int i; |
| 3099 | |
| 3100 | qsort_assert(pc_left <= pc_right); |
| 3101 | qsort_assert(u_right < pc_left); |
| 3102 | qsort_assert(pc_right < u_left); |
| 3103 | for (i = u_right + 1; i < pc_left; ++i) { |
| 3104 | qsort_assert(qsort_cmp(i, pc_left) < 0); |
| 3105 | } |
| 3106 | for (i = pc_left; i < pc_right; ++i) { |
| 3107 | qsort_assert(qsort_cmp(i, pc_right) == 0); |
| 3108 | } |
| 3109 | for (i = pc_right + 1; i < u_left; ++i) { |
| 3110 | qsort_assert(qsort_cmp(pc_right, i) < 0); |
| 3111 | } |
| 3112 | } |
| 3113 | |
| 3114 | #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) \ |
| 3115 | doqsort_all_asserts(array, num_elts, elt_size, compare, \ |
| 3116 | PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) |
| 3117 | |
| 3118 | #else |
| 3119 | |
| 3120 | #define qsort_assert(t) ((void)0) |
| 3121 | |
| 3122 | #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) ((void)0) |
| 3123 | |
| 3124 | #endif |
| 3125 | |
| 3126 | /* ****************************************************************** qsort */ |
| 3127 | |
| 3128 | void |
| 3129 | #ifdef PERL_OBJECT |
| 3130 | qsortsv(SV ** array, size_t num_elts, SVCOMPARE compare) |
| 3131 | #else |
| 3132 | qsortsv( |
| 3133 | SV ** array, |
| 3134 | size_t num_elts, |
| 3135 | I32 (*compare)(SV *a, SV *b)) |
| 3136 | #endif |
| 3137 | { |
| 3138 | register SV * temp; |
| 3139 | |
| 3140 | struct partition_stack_entry partition_stack[QSORT_MAX_STACK]; |
| 3141 | int next_stack_entry = 0; |
| 3142 | |
| 3143 | int part_left; |
| 3144 | int part_right; |
| 3145 | #ifdef QSORT_ORDER_GUESS |
| 3146 | int qsort_break_even; |
| 3147 | int swapped; |
| 3148 | #endif |
| 3149 | |
| 3150 | /* Make sure we actually have work to do. |
| 3151 | */ |
| 3152 | if (num_elts <= 1) { |
| 3153 | return; |
| 3154 | } |
| 3155 | |
| 3156 | /* Setup the initial partition definition and fall into the sorting loop |
| 3157 | */ |
| 3158 | part_left = 0; |
| 3159 | part_right = (int)(num_elts - 1); |
| 3160 | #ifdef QSORT_ORDER_GUESS |
| 3161 | qsort_break_even = QSORT_BREAK_EVEN; |
| 3162 | #else |
| 3163 | #define qsort_break_even QSORT_BREAK_EVEN |
| 3164 | #endif |
| 3165 | for ( ; ; ) { |
| 3166 | if ((part_right - part_left) >= qsort_break_even) { |
| 3167 | /* OK, this is gonna get hairy, so lets try to document all the |
| 3168 | concepts and abbreviations and variables and what they keep |
| 3169 | track of: |
| 3170 | |
| 3171 | pc: pivot chunk - the set of array elements we accumulate in the |
| 3172 | middle of the partition, all equal in value to the original |
| 3173 | pivot element selected. The pc is defined by: |
| 3174 | |
| 3175 | pc_left - the leftmost array index of the pc |
| 3176 | pc_right - the rightmost array index of the pc |
| 3177 | |
| 3178 | we start with pc_left == pc_right and only one element |
| 3179 | in the pivot chunk (but it can grow during the scan). |
| 3180 | |
| 3181 | u: uncompared elements - the set of elements in the partition |
| 3182 | we have not yet compared to the pivot value. There are two |
| 3183 | uncompared sets during the scan - one to the left of the pc |
| 3184 | and one to the right. |
| 3185 | |
| 3186 | u_right - the rightmost index of the left side's uncompared set |
| 3187 | u_left - the leftmost index of the right side's uncompared set |
| 3188 | |
| 3189 | The leftmost index of the left sides's uncompared set |
| 3190 | doesn't need its own variable because it is always defined |
| 3191 | by the leftmost edge of the whole partition (part_left). The |
| 3192 | same goes for the rightmost edge of the right partition |
| 3193 | (part_right). |
| 3194 | |
| 3195 | We know there are no uncompared elements on the left once we |
| 3196 | get u_right < part_left and no uncompared elements on the |
| 3197 | right once u_left > part_right. When both these conditions |
| 3198 | are met, we have completed the scan of the partition. |
| 3199 | |
| 3200 | Any elements which are between the pivot chunk and the |
| 3201 | uncompared elements should be less than the pivot value on |
| 3202 | the left side and greater than the pivot value on the right |
| 3203 | side (in fact, the goal of the whole algorithm is to arrange |
| 3204 | for that to be true and make the groups of less-than and |
| 3205 | greater-then elements into new partitions to sort again). |
| 3206 | |
| 3207 | As you marvel at the complexity of the code and wonder why it |
| 3208 | has to be so confusing. Consider some of the things this level |
| 3209 | of confusion brings: |
| 3210 | |
| 3211 | Once I do a compare, I squeeze every ounce of juice out of it. I |
| 3212 | never do compare calls I don't have to do, and I certainly never |
| 3213 | do redundant calls. |
| 3214 | |
| 3215 | I also never swap any elements unless I can prove there is a |
| 3216 | good reason. Many sort algorithms will swap a known value with |
| 3217 | an uncompared value just to get things in the right place (or |
| 3218 | avoid complexity :-), but that uncompared value, once it gets |
| 3219 | compared, may then have to be swapped again. A lot of the |
| 3220 | complexity of this code is due to the fact that it never swaps |
| 3221 | anything except compared values, and it only swaps them when the |
| 3222 | compare shows they are out of position. |
| 3223 | */ |
| 3224 | int pc_left, pc_right; |
| 3225 | int u_right, u_left; |
| 3226 | |
| 3227 | int s; |
| 3228 | |
| 3229 | pc_left = ((part_left + part_right) / 2); |
| 3230 | pc_right = pc_left; |
| 3231 | u_right = pc_left - 1; |
| 3232 | u_left = pc_right + 1; |
| 3233 | |
| 3234 | /* Qsort works best when the pivot value is also the median value |
| 3235 | in the partition (unfortunately you can't find the median value |
| 3236 | without first sorting :-), so to give the algorithm a helping |
| 3237 | hand, we pick 3 elements and sort them and use the median value |
| 3238 | of that tiny set as the pivot value. |
| 3239 | |
| 3240 | Some versions of qsort like to use the left middle and right as |
| 3241 | the 3 elements to sort so they can insure the ends of the |
| 3242 | partition will contain values which will stop the scan in the |
| 3243 | compare loop, but when you have to call an arbitrarily complex |
| 3244 | routine to do a compare, its really better to just keep track of |
| 3245 | array index values to know when you hit the edge of the |
| 3246 | partition and avoid the extra compare. An even better reason to |
| 3247 | avoid using a compare call is the fact that you can drop off the |
| 3248 | edge of the array if someone foolishly provides you with an |
| 3249 | unstable compare function that doesn't always provide consistent |
| 3250 | results. |
| 3251 | |
| 3252 | So, since it is simpler for us to compare the three adjacent |
| 3253 | elements in the middle of the partition, those are the ones we |
| 3254 | pick here (conveniently pointed at by u_right, pc_left, and |
| 3255 | u_left). The values of the left, center, and right elements |
| 3256 | are refered to as l c and r in the following comments. |
| 3257 | */ |
| 3258 | |
| 3259 | #ifdef QSORT_ORDER_GUESS |
| 3260 | swapped = 0; |
| 3261 | #endif |
| 3262 | s = qsort_cmp(u_right, pc_left); |
| 3263 | if (s < 0) { |
| 3264 | /* l < c */ |
| 3265 | s = qsort_cmp(pc_left, u_left); |
| 3266 | /* if l < c, c < r - already in order - nothing to do */ |
| 3267 | if (s == 0) { |
| 3268 | /* l < c, c == r - already in order, pc grows */ |
| 3269 | ++pc_right; |
| 3270 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3271 | } else if (s > 0) { |
| 3272 | /* l < c, c > r - need to know more */ |
| 3273 | s = qsort_cmp(u_right, u_left); |
| 3274 | if (s < 0) { |
| 3275 | /* l < c, c > r, l < r - swap c & r to get ordered */ |
| 3276 | qsort_swap(pc_left, u_left); |
| 3277 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3278 | } else if (s == 0) { |
| 3279 | /* l < c, c > r, l == r - swap c&r, grow pc */ |
| 3280 | qsort_swap(pc_left, u_left); |
| 3281 | --pc_left; |
| 3282 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3283 | } else { |
| 3284 | /* l < c, c > r, l > r - make lcr into rlc to get ordered */ |
| 3285 | qsort_rotate(pc_left, u_right, u_left); |
| 3286 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3287 | } |
| 3288 | } |
| 3289 | } else if (s == 0) { |
| 3290 | /* l == c */ |
| 3291 | s = qsort_cmp(pc_left, u_left); |
| 3292 | if (s < 0) { |
| 3293 | /* l == c, c < r - already in order, grow pc */ |
| 3294 | --pc_left; |
| 3295 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3296 | } else if (s == 0) { |
| 3297 | /* l == c, c == r - already in order, grow pc both ways */ |
| 3298 | --pc_left; |
| 3299 | ++pc_right; |
| 3300 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3301 | } else { |
| 3302 | /* l == c, c > r - swap l & r, grow pc */ |
| 3303 | qsort_swap(u_right, u_left); |
| 3304 | ++pc_right; |
| 3305 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3306 | } |
| 3307 | } else { |
| 3308 | /* l > c */ |
| 3309 | s = qsort_cmp(pc_left, u_left); |
| 3310 | if (s < 0) { |
| 3311 | /* l > c, c < r - need to know more */ |
| 3312 | s = qsort_cmp(u_right, u_left); |
| 3313 | if (s < 0) { |
| 3314 | /* l > c, c < r, l < r - swap l & c to get ordered */ |
| 3315 | qsort_swap(u_right, pc_left); |
| 3316 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3317 | } else if (s == 0) { |
| 3318 | /* l > c, c < r, l == r - swap l & c, grow pc */ |
| 3319 | qsort_swap(u_right, pc_left); |
| 3320 | ++pc_right; |
| 3321 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3322 | } else { |
| 3323 | /* l > c, c < r, l > r - rotate lcr into crl to order */ |
| 3324 | qsort_rotate(u_right, pc_left, u_left); |
| 3325 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3326 | } |
| 3327 | } else if (s == 0) { |
| 3328 | /* l > c, c == r - swap ends, grow pc */ |
| 3329 | qsort_swap(u_right, u_left); |
| 3330 | --pc_left; |
| 3331 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3332 | } else { |
| 3333 | /* l > c, c > r - swap ends to get in order */ |
| 3334 | qsort_swap(u_right, u_left); |
| 3335 | qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1); |
| 3336 | } |
| 3337 | } |
| 3338 | /* We now know the 3 middle elements have been compared and |
| 3339 | arranged in the desired order, so we can shrink the uncompared |
| 3340 | sets on both sides |
| 3341 | */ |
| 3342 | --u_right; |
| 3343 | ++u_left; |
| 3344 | qsort_all_asserts(pc_left, pc_right, u_left, u_right); |
| 3345 | |
| 3346 | /* The above massive nested if was the simple part :-). We now have |
| 3347 | the middle 3 elements ordered and we need to scan through the |
| 3348 | uncompared sets on either side, swapping elements that are on |
| 3349 | the wrong side or simply shuffling equal elements around to get |
| 3350 | all equal elements into the pivot chunk. |
| 3351 | */ |
| 3352 | |
| 3353 | for ( ; ; ) { |
| 3354 | int still_work_on_left; |
| 3355 | int still_work_on_right; |
| 3356 | |
| 3357 | /* Scan the uncompared values on the left. If I find a value |
| 3358 | equal to the pivot value, move it over so it is adjacent to |
| 3359 | the pivot chunk and expand the pivot chunk. If I find a value |
| 3360 | less than the pivot value, then just leave it - its already |
| 3361 | on the correct side of the partition. If I find a greater |
| 3362 | value, then stop the scan. |
| 3363 | */ |
| 3364 | while (still_work_on_left = (u_right >= part_left)) { |
| 3365 | s = qsort_cmp(u_right, pc_left); |
| 3366 | if (s < 0) { |
| 3367 | --u_right; |
| 3368 | } else if (s == 0) { |
| 3369 | --pc_left; |
| 3370 | if (pc_left != u_right) { |
| 3371 | qsort_swap(u_right, pc_left); |
| 3372 | } |
| 3373 | --u_right; |
| 3374 | } else { |
| 3375 | break; |
| 3376 | } |
| 3377 | qsort_assert(u_right < pc_left); |
| 3378 | qsort_assert(pc_left <= pc_right); |
| 3379 | qsort_assert(qsort_cmp(u_right + 1, pc_left) <= 0); |
| 3380 | qsort_assert(qsort_cmp(pc_left, pc_right) == 0); |
| 3381 | } |
| 3382 | |
| 3383 | /* Do a mirror image scan of uncompared values on the right |
| 3384 | */ |
| 3385 | while (still_work_on_right = (u_left <= part_right)) { |
| 3386 | s = qsort_cmp(pc_right, u_left); |
| 3387 | if (s < 0) { |
| 3388 | ++u_left; |
| 3389 | } else if (s == 0) { |
| 3390 | ++pc_right; |
| 3391 | if (pc_right != u_left) { |
| 3392 | qsort_swap(pc_right, u_left); |
| 3393 | } |
| 3394 | ++u_left; |
| 3395 | } else { |
| 3396 | break; |
| 3397 | } |
| 3398 | qsort_assert(u_left > pc_right); |
| 3399 | qsort_assert(pc_left <= pc_right); |
| 3400 | qsort_assert(qsort_cmp(pc_right, u_left - 1) <= 0); |
| 3401 | qsort_assert(qsort_cmp(pc_left, pc_right) == 0); |
| 3402 | } |
| 3403 | |
| 3404 | if (still_work_on_left) { |
| 3405 | /* I know I have a value on the left side which needs to be |
| 3406 | on the right side, but I need to know more to decide |
| 3407 | exactly the best thing to do with it. |
| 3408 | */ |
| 3409 | if (still_work_on_right) { |
| 3410 | /* I know I have values on both side which are out of |
| 3411 | position. This is a big win because I kill two birds |
| 3412 | with one swap (so to speak). I can advance the |
| 3413 | uncompared pointers on both sides after swapping both |
| 3414 | of them into the right place. |
| 3415 | */ |
| 3416 | qsort_swap(u_right, u_left); |
| 3417 | --u_right; |
| 3418 | ++u_left; |
| 3419 | qsort_all_asserts(pc_left, pc_right, u_left, u_right); |
| 3420 | } else { |
| 3421 | /* I have an out of position value on the left, but the |
| 3422 | right is fully scanned, so I "slide" the pivot chunk |
| 3423 | and any less-than values left one to make room for the |
| 3424 | greater value over on the right. If the out of position |
| 3425 | value is immediately adjacent to the pivot chunk (there |
| 3426 | are no less-than values), I can do that with a swap, |
| 3427 | otherwise, I have to rotate one of the less than values |
| 3428 | into the former position of the out of position value |
| 3429 | and the right end of the pivot chunk into the left end |
| 3430 | (got all that?). |
| 3431 | */ |
| 3432 | --pc_left; |
| 3433 | if (pc_left == u_right) { |
| 3434 | qsort_swap(u_right, pc_right); |
| 3435 | qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1); |
| 3436 | } else { |
| 3437 | qsort_rotate(u_right, pc_left, pc_right); |
| 3438 | qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1); |
| 3439 | } |
| 3440 | --pc_right; |
| 3441 | --u_right; |
| 3442 | } |
| 3443 | } else if (still_work_on_right) { |
| 3444 | /* Mirror image of complex case above: I have an out of |
| 3445 | position value on the right, but the left is fully |
| 3446 | scanned, so I need to shuffle things around to make room |
| 3447 | for the right value on the left. |
| 3448 | */ |
| 3449 | ++pc_right; |
| 3450 | if (pc_right == u_left) { |
| 3451 | qsort_swap(u_left, pc_left); |
| 3452 | qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right); |
| 3453 | } else { |
| 3454 | qsort_rotate(pc_right, pc_left, u_left); |
| 3455 | qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right); |
| 3456 | } |
| 3457 | ++pc_left; |
| 3458 | ++u_left; |
| 3459 | } else { |
| 3460 | /* No more scanning required on either side of partition, |
| 3461 | break out of loop and figure out next set of partitions |
| 3462 | */ |
| 3463 | break; |
| 3464 | } |
| 3465 | } |
| 3466 | |
| 3467 | /* The elements in the pivot chunk are now in the right place. They |
| 3468 | will never move or be compared again. All I have to do is decide |
| 3469 | what to do with the stuff to the left and right of the pivot |
| 3470 | chunk. |
| 3471 | |
| 3472 | Notes on the QSORT_ORDER_GUESS ifdef code: |
| 3473 | |
| 3474 | 1. If I just built these partitions without swapping any (or |
| 3475 | very many) elements, there is a chance that the elements are |
| 3476 | already ordered properly (being properly ordered will |
| 3477 | certainly result in no swapping, but the converse can't be |
| 3478 | proved :-). |
| 3479 | |
| 3480 | 2. A (properly written) insertion sort will run faster on |
| 3481 | already ordered data than qsort will. |
| 3482 | |
| 3483 | 3. Perhaps there is some way to make a good guess about |
| 3484 | switching to an insertion sort earlier than partition size 6 |
| 3485 | (for instance - we could save the partition size on the stack |
| 3486 | and increase the size each time we find we didn't swap, thus |
| 3487 | switching to insertion sort earlier for partitions with a |
| 3488 | history of not swapping). |
| 3489 | |
| 3490 | 4. Naturally, if I just switch right away, it will make |
| 3491 | artificial benchmarks with pure ascending (or descending) |
| 3492 | data look really good, but is that a good reason in general? |
| 3493 | Hard to say... |
| 3494 | */ |
| 3495 | |
| 3496 | #ifdef QSORT_ORDER_GUESS |
| 3497 | if (swapped < 3) { |
| 3498 | #if QSORT_ORDER_GUESS == 1 |
| 3499 | qsort_break_even = (part_right - part_left) + 1; |
| 3500 | #endif |
| 3501 | #if QSORT_ORDER_GUESS == 2 |
| 3502 | qsort_break_even *= 2; |
| 3503 | #endif |
| 3504 | #if QSORT_ORDER_GUESS == 3 |
| 3505 | int prev_break = qsort_break_even; |
| 3506 | qsort_break_even *= qsort_break_even; |
| 3507 | if (qsort_break_even < prev_break) { |
| 3508 | qsort_break_even = (part_right - part_left) + 1; |
| 3509 | } |
| 3510 | #endif |
| 3511 | } else { |
| 3512 | qsort_break_even = QSORT_BREAK_EVEN; |
| 3513 | } |
| 3514 | #endif |
| 3515 | |
| 3516 | if (part_left < pc_left) { |
| 3517 | /* There are elements on the left which need more processing. |
| 3518 | Check the right as well before deciding what to do. |
| 3519 | */ |
| 3520 | if (pc_right < part_right) { |
| 3521 | /* We have two partitions to be sorted. Stack the biggest one |
| 3522 | and process the smallest one on the next iteration. This |
| 3523 | minimizes the stack height by insuring that any additional |
| 3524 | stack entries must come from the smallest partition which |
| 3525 | (because it is smallest) will have the fewest |
| 3526 | opportunities to generate additional stack entries. |
| 3527 | */ |
| 3528 | if ((part_right - pc_right) > (pc_left - part_left)) { |
| 3529 | /* stack the right partition, process the left */ |
| 3530 | partition_stack[next_stack_entry].left = pc_right + 1; |
| 3531 | partition_stack[next_stack_entry].right = part_right; |
| 3532 | #ifdef QSORT_ORDER_GUESS |
| 3533 | partition_stack[next_stack_entry].qsort_break_even = qsort_break_even; |
| 3534 | #endif |
| 3535 | part_right = pc_left - 1; |
| 3536 | } else { |
| 3537 | /* stack the left partition, process the right */ |
| 3538 | partition_stack[next_stack_entry].left = part_left; |
| 3539 | partition_stack[next_stack_entry].right = pc_left - 1; |
| 3540 | #ifdef QSORT_ORDER_GUESS |
| 3541 | partition_stack[next_stack_entry].qsort_break_even = qsort_break_even; |
| 3542 | #endif |
| 3543 | part_left = pc_right + 1; |
| 3544 | } |
| 3545 | qsort_assert(next_stack_entry < QSORT_MAX_STACK); |
| 3546 | ++next_stack_entry; |
| 3547 | } else { |
| 3548 | /* The elements on the left are the only remaining elements |
| 3549 | that need sorting, arrange for them to be processed as the |
| 3550 | next partition. |
| 3551 | */ |
| 3552 | part_right = pc_left - 1; |
| 3553 | } |
| 3554 | } else if (pc_right < part_right) { |
| 3555 | /* There is only one chunk on the right to be sorted, make it |
| 3556 | the new partition and loop back around. |
| 3557 | */ |
| 3558 | part_left = pc_right + 1; |
| 3559 | } else { |
| 3560 | /* This whole partition wound up in the pivot chunk, so |
| 3561 | we need to get a new partition off the stack. |
| 3562 | */ |
| 3563 | if (next_stack_entry == 0) { |
| 3564 | /* the stack is empty - we are done */ |
| 3565 | break; |
| 3566 | } |
| 3567 | --next_stack_entry; |
| 3568 | part_left = partition_stack[next_stack_entry].left; |
| 3569 | part_right = partition_stack[next_stack_entry].right; |
| 3570 | #ifdef QSORT_ORDER_GUESS |
| 3571 | qsort_break_even = partition_stack[next_stack_entry].qsort_break_even; |
| 3572 | #endif |
| 3573 | } |
| 3574 | } else { |
| 3575 | /* This partition is too small to fool with qsort complexity, just |
| 3576 | do an ordinary insertion sort to minimize overhead. |
| 3577 | */ |
| 3578 | int i; |
| 3579 | /* Assume 1st element is in right place already, and start checking |
| 3580 | at 2nd element to see where it should be inserted. |
| 3581 | */ |
| 3582 | for (i = part_left + 1; i <= part_right; ++i) { |
| 3583 | int j; |
| 3584 | /* Scan (backwards - just in case 'i' is already in right place) |
| 3585 | through the elements already sorted to see if the ith element |
| 3586 | belongs ahead of one of them. |
| 3587 | */ |
| 3588 | for (j = i - 1; j >= part_left; --j) { |
| 3589 | if (qsort_cmp(i, j) >= 0) { |
| 3590 | /* i belongs right after j |
| 3591 | */ |
| 3592 | break; |
| 3593 | } |
| 3594 | } |
| 3595 | ++j; |
| 3596 | if (j != i) { |
| 3597 | /* Looks like we really need to move some things |
| 3598 | */ |
| 3599 | int k; |
| 3600 | temp = array[i]; |
| 3601 | for (k = i - 1; k >= j; --k) |
| 3602 | array[k + 1] = array[k]; |
| 3603 | array[j] = temp; |
| 3604 | } |
| 3605 | } |
| 3606 | |
| 3607 | /* That partition is now sorted, grab the next one, or get out |
| 3608 | of the loop if there aren't any more. |
| 3609 | */ |
| 3610 | |
| 3611 | if (next_stack_entry == 0) { |
| 3612 | /* the stack is empty - we are done */ |
| 3613 | break; |
| 3614 | } |
| 3615 | --next_stack_entry; |
| 3616 | part_left = partition_stack[next_stack_entry].left; |
| 3617 | part_right = partition_stack[next_stack_entry].right; |
| 3618 | #ifdef QSORT_ORDER_GUESS |
| 3619 | qsort_break_even = partition_stack[next_stack_entry].qsort_break_even; |
| 3620 | #endif |
| 3621 | } |
| 3622 | } |
| 3623 | |
| 3624 | /* Believe it or not, the array is sorted at this point! */ |
| 3625 | } |