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This is my patch patch.1n for perl5.001.
[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW		 1/* pp_ctl.c
2 *
3 * Copyright (c) 1991-1994, 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
26static OP *doeval _((int gimme));
27static OP *dofindlabel _((OP *op, char *label, OP **opstack));
28static void doparseform _((SV *sv));
29static I32 dopoptoeval _((I32 startingblock));
30static I32 dopoptolabel _((char *label));
31static I32 dopoptoloop _((I32 startingblock));
32static I32 dopoptosub _((I32 startingblock));
33static void save_lines _((AV *array, SV *sv));
34static int sortcmp _((const void *, const void *));
35static int sortcv _((const void *, const void *));
36
37static I32 sortcxix;
38
39PP(pp_wantarray)
40{
41 dSP;
42 I32 cxix;
43 EXTEND(SP, 1);
44
45 cxix = dopoptosub(cxstack_ix);
46 if (cxix < 0)
47 RETPUSHUNDEF;
48
49 if (cxstack[cxix].blk_gimme == G_ARRAY)
50 RETPUSHYES;
51 else
52 RETPUSHNO;
53}
54
55PP(pp_regcmaybe)
56{
57 return NORMAL;
58}
59
60PP(pp_regcomp) {
61 dSP;
62 register PMOP *pm = (PMOP*)cLOGOP->op_other;
63 register char *t;
64 SV *tmpstr;
65 STRLEN len;
66
67 tmpstr = POPs;
68 t = SvPV(tmpstr, len);
69
70 if (pm->op_pmregexp) {
e50aee73 71 pregfree(pm->op_pmregexp);
a0d0e21e
LW		 72 pm->op_pmregexp = Null(REGEXP*); /* crucial if regcomp aborts */
73 }
74
e50aee73 75 pm->op_pmregexp = pregcomp(t, t + len, pm);
a0d0e21e
LW		 76
77 if (!pm->op_pmregexp->prelen && curpm)
78 pm = curpm;
79 else if (strEQ("\\s+", pm->op_pmregexp->precomp))
80 pm->op_pmflags |= PMf_WHITE;
81
82 if (pm->op_pmflags & PMf_KEEP) {
a0d0e21e
LW		 83 pm->op_pmflags &= ~PMf_RUNTIME; /* no point compiling again */
84 hoistmust(pm);
85 cLOGOP->op_first->op_next = op->op_next;
a0d0e21e
LW		 86 }
87 RETURN;
88}
89
90PP(pp_substcont)
91{
92 dSP;
93 register PMOP *pm = (PMOP*) cLOGOP->op_other;
94 register CONTEXT *cx = &cxstack[cxstack_ix];
95 register SV *dstr = cx->sb_dstr;
96 register char *s = cx->sb_s;
97 register char *m = cx->sb_m;
98 char *orig = cx->sb_orig;
99 register REGEXP *rx = pm->op_pmregexp;
100
101 if (cx->sb_iters++) {
102 if (cx->sb_iters > cx->sb_maxiters)
103 DIE("Substitution loop");
104
105 sv_catsv(dstr, POPs);
106 if (rx->subbase)
107 Safefree(rx->subbase);
108 rx->subbase = cx->sb_subbase;
109
110 /* Are we done */
e50aee73 111 if (cx->sb_once || !pregexec(rx, s, cx->sb_strend, orig,
a0d0e21e
LW		 112 s == m, Nullsv, cx->sb_safebase))
113 {
114 SV *targ = cx->sb_targ;
115 sv_catpvn(dstr, s, cx->sb_strend - s);
748a9306 116
cb0b1708 117 Safefree(SvPVX(targ));
748a9306
LW		 118 SvPVX(targ) = SvPVX(dstr);
119 SvCUR_set(targ, SvCUR(dstr));
120 SvLEN_set(targ, SvLEN(dstr));
121 SvPVX(dstr) = 0;
122 sv_free(dstr);
123
a0d0e21e
LW		 124 (void)SvPOK_only(targ);
125 SvSETMAGIC(targ);
126 PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
127 POPSUBST(cx);
128 RETURNOP(pm->op_next);
129 }
130 }
131 if (rx->subbase && rx->subbase != orig) {
132 m = s;
133 s = orig;
134 cx->sb_orig = orig = rx->subbase;
135 s = orig + (m - s);
136 cx->sb_strend = s + (cx->sb_strend - m);
137 }
138 cx->sb_m = m = rx->startp[0];
139 sv_catpvn(dstr, s, m-s);
140 cx->sb_s = rx->endp[0];
141 cx->sb_subbase = rx->subbase;
142
143 rx->subbase = Nullch; /* so recursion works */
144 RETURNOP(pm->op_pmreplstart);
145}
146
147PP(pp_formline)
148{
149 dSP; dMARK; dORIGMARK;
150 register SV *form = *++MARK;
151 register U16 *fpc;
152 register char *t;
153 register char *f;
154 register char *s;
155 register char *send;
156 register I32 arg;
157 register SV *sv;
158 char *item;
159 I32 itemsize;
160 I32 fieldsize;
161 I32 lines = 0;
162 bool chopspace = (strchr(chopset, ' ') != Nullch);
163 char *chophere;
164 char *linemark;
a0d0e21e
LW		 165 double value;
166 bool gotsome;
167 STRLEN len;
168
169 if (!SvCOMPILED(form)) {
170 SvREADONLY_off(form);
171 doparseform(form);
172 }
173
174 SvPV_force(formtarget, len);
175 t = SvGROW(formtarget, len + SvCUR(form) + 1); /* XXX SvCUR bad */
176 t += len;
177 f = SvPV(form, len);
178 /* need to jump to the next word */
179 s = f + len + WORD_ALIGN - SvCUR(form) % WORD_ALIGN;
180
181 fpc = (U16*)s;
182
183 for (;;) {
184 DEBUG_f( {
185 char *name = "???";
186 arg = -1;
187 switch (*fpc) {
188 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
189 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
190 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
191 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
192 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
193
194 case FF_CHECKNL: name = "CHECKNL"; break;
195 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
196 case FF_SPACE: name = "SPACE"; break;
197 case FF_HALFSPACE: name = "HALFSPACE"; break;
198 case FF_ITEM: name = "ITEM"; break;
199 case FF_CHOP: name = "CHOP"; break;
200 case FF_LINEGLOB: name = "LINEGLOB"; break;
201 case FF_NEWLINE: name = "NEWLINE"; break;
202 case FF_MORE: name = "MORE"; break;
203 case FF_LINEMARK: name = "LINEMARK"; break;
204 case FF_END: name = "END"; break;
205 }
206 if (arg >= 0)
207 fprintf(stderr, "%-16s%ld\n", name, (long) arg);
208 else
209 fprintf(stderr, "%-16s\n", name);
210 } )
211 switch (*fpc++) {
212 case FF_LINEMARK:
213 linemark = t;
a0d0e21e
LW		 214 lines++;
215 gotsome = FALSE;
216 break;
217
218 case FF_LITERAL:
219 arg = *fpc++;
220 while (arg--)
221 *t++ = *f++;
222 break;
223
224 case FF_SKIP:
225 f += *fpc++;
226 break;
227
228 case FF_FETCH:
229 arg = *fpc++;
230 f += arg;
231 fieldsize = arg;
232
233 if (MARK < SP)
234 sv = *++MARK;
235 else {
236 sv = &sv_no;
237 if (dowarn)
238 warn("Not enough format arguments");
239 }
240 break;
241
242 case FF_CHECKNL:
243 item = s = SvPV(sv, len);
244 itemsize = len;
245 if (itemsize > fieldsize)
246 itemsize = fieldsize;
247 send = chophere = s + itemsize;
248 while (s < send) {
249 if (*s & ~31)
250 gotsome = TRUE;
251 else if (*s == '\n')
252 break;
253 s++;
254 }
255 itemsize = s - item;
256 break;
257
258 case FF_CHECKCHOP:
259 item = s = SvPV(sv, len);
260 itemsize = len;
261 if (itemsize <= fieldsize) {
262 send = chophere = s + itemsize;
263 while (s < send) {
264 if (*s == '\r') {
265 itemsize = s - item;
266 break;
267 }
268 if (*s++ & ~31)
269 gotsome = TRUE;
270 }
271 }
272 else {
273 itemsize = fieldsize;
274 send = chophere = s + itemsize;
275 while (s < send || (s == send && isSPACE(*s))) {
276 if (isSPACE(*s)) {
277 if (chopspace)
278 chophere = s;
279 if (*s == '\r')
280 break;
281 }
282 else {
283 if (*s & ~31)
284 gotsome = TRUE;
285 if (strchr(chopset, *s))
286 chophere = s + 1;
287 }
288 s++;
289 }
290 itemsize = chophere - item;
291 }
292 break;
293
294 case FF_SPACE:
295 arg = fieldsize - itemsize;
296 if (arg) {
297 fieldsize -= arg;
298 while (arg-- > 0)
299 *t++ = ' ';
300 }
301 break;
302
303 case FF_HALFSPACE:
304 arg = fieldsize - itemsize;
305 if (arg) {
306 arg /= 2;
307 fieldsize -= arg;
308 while (arg-- > 0)
309 *t++ = ' ';
310 }
311 break;
312
313 case FF_ITEM:
314 arg = itemsize;
315 s = item;
316 while (arg--) {
317#if 'z' - 'a' != 25
318 int ch = *t++ = *s++;
319 if (!iscntrl(ch))
320 t[-1] = ' ';
321#else
322 if ( !((*t++ = *s++) & ~31) )
323 t[-1] = ' ';
324#endif
325
326 }
327 break;
328
329 case FF_CHOP:
330 s = chophere;
331 if (chopspace) {
332 while (*s && isSPACE(*s))
333 s++;
334 }
335 sv_chop(sv,s);
336 break;
337
338 case FF_LINEGLOB:
339 item = s = SvPV(sv, len);
340 itemsize = len;
341 if (itemsize) {
342 gotsome = TRUE;
343 send = s + itemsize;
344 while (s < send) {
345 if (*s++ == '\n') {
346 if (s == send)
347 itemsize--;
348 else
349 lines++;
350 }
351 }
352 SvCUR_set(formtarget, t - SvPVX(formtarget));
353 sv_catpvn(formtarget, item, itemsize);
354 SvGROW(formtarget, SvCUR(formtarget) + SvCUR(form) + 1);
355 t = SvPVX(formtarget) + SvCUR(formtarget);
356 }
357 break;
358
359 case FF_DECIMAL:
360 /* If the field is marked with ^ and the value is undefined,
361 blank it out. */
362 arg = *fpc++;
363 if ((arg & 512) && !SvOK(sv)) {
364 arg = fieldsize;
365 while (arg--)
366 *t++ = ' ';
367 break;
368 }
369 gotsome = TRUE;
370 value = SvNV(sv);
371 if (arg & 256) {
372 sprintf(t, "%#*.*f", (int) fieldsize, (int) arg & 255, value);
373 } else {
374 sprintf(t, "%*.0f", (int) fieldsize, value);
375 }
376 t += fieldsize;
377 break;
378
379 case FF_NEWLINE:
380 f++;
381 while (t-- > linemark && *t == ' ') ;
382 t++;
383 *t++ = '\n';
384 break;
385
386 case FF_BLANK:
387 arg = *fpc++;
388 if (gotsome) {
389 if (arg) { /* repeat until fields exhausted? */
390 *t = '\0';
391 SvCUR_set(formtarget, t - SvPVX(formtarget));
392 lines += FmLINES(formtarget);
393 if (lines == 200) {
394 arg = t - linemark;
395 if (strnEQ(linemark, linemark - arg, arg))
396 DIE("Runaway format");
397 }
398 FmLINES(formtarget) = lines;
399 SP = ORIGMARK;
400 RETURNOP(cLISTOP->op_first);
401 }
402 }
403 else {
404 t = linemark;
405 lines--;
406 }
407 break;
408
409 case FF_MORE:
410 if (itemsize) {
411 arg = fieldsize - itemsize;
412 if (arg) {
413 fieldsize -= arg;
414 while (arg-- > 0)
415 *t++ = ' ';
416 }
417 s = t - 3;
418 if (strnEQ(s," ",3)) {
419 while (s > SvPVX(formtarget) && isSPACE(s[-1]))
420 s--;
421 }
422 *s++ = '.';
423 *s++ = '.';
424 *s++ = '.';
425 }
426 break;
427
428 case FF_END:
429 *t = '\0';
430 SvCUR_set(formtarget, t - SvPVX(formtarget));
431 FmLINES(formtarget) += lines;
432 SP = ORIGMARK;
433 RETPUSHYES;
434 }
435 }
436}
437
438PP(pp_grepstart)
439{
440 dSP;
441 SV *src;
442
443 if (stack_base + *markstack_ptr == sp) {
444 (void)POPMARK;
445 if (GIMME != G_ARRAY)
446 XPUSHs(&sv_no);
447 RETURNOP(op->op_next->op_next);
448 }
449 stack_sp = stack_base + *markstack_ptr + 1;
450 pp_pushmark(); /* push dst */
451 pp_pushmark(); /* push src */
452 ENTER; /* enter outer scope */
453
454 SAVETMPS;
455 SAVESPTR(GvSV(defgv));
456
457 ENTER; /* enter inner scope */
458 SAVESPTR(curpm);
459
460 src = stack_base[*markstack_ptr];
461 SvTEMP_off(src);
462 GvSV(defgv) = src;
463
464 PUTBACK;
465 if (op->op_type == OP_MAPSTART)
466 pp_pushmark(); /* push top */
467 return ((LOGOP*)op->op_next)->op_other;
468}
469
470PP(pp_mapstart)
471{
472 DIE("panic: mapstart"); /* uses grepstart */
473}
474
475PP(pp_mapwhile)
476{
477 dSP;
478 I32 diff = (sp - stack_base) - *markstack_ptr;
479 I32 count;
480 I32 shift;
481 SV** src;
482 SV** dst;
483
484 ++markstack_ptr[-1];
485 if (diff) {
486 if (diff > markstack_ptr[-1] - markstack_ptr[-2]) {
487 shift = diff - (markstack_ptr[-1] - markstack_ptr[-2]);
488 count = (sp - stack_base) - markstack_ptr[-1] + 2;
489
490 EXTEND(sp,shift);
491 src = sp;
492 dst = (sp += shift);
493 markstack_ptr[-1] += shift;
494 *markstack_ptr += shift;
495 while (--count)
496 *dst-- = *src--;
497 }
498 dst = stack_base + (markstack_ptr[-2] += diff) - 1;
499 ++diff;
500 while (--diff)
501 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
502 }
503 LEAVE; /* exit inner scope */
504
505 /* All done yet? */
506 if (markstack_ptr[-1] > *markstack_ptr) {
507 I32 items;
508
509 (void)POPMARK; /* pop top */
510 LEAVE; /* exit outer scope */
511 (void)POPMARK; /* pop src */
512 items = --*markstack_ptr - markstack_ptr[-1];
513 (void)POPMARK; /* pop dst */
514 SP = stack_base + POPMARK; /* pop original mark */
515 if (GIMME != G_ARRAY) {
516 dTARGET;
517 XPUSHi(items);
518 RETURN;
519 }
520 SP += items;
521 RETURN;
522 }
523 else {
524 SV *src;
525
526 ENTER; /* enter inner scope */
527 SAVESPTR(curpm);
528
529 src = stack_base[markstack_ptr[-1]];
530 SvTEMP_off(src);
531 GvSV(defgv) = src;
532
533 RETURNOP(cLOGOP->op_other);
534 }
535}
536
537
538PP(pp_sort)
539{
540 dSP; dMARK; dORIGMARK;
541 register SV **up;
542 SV **myorigmark = ORIGMARK;
543 register I32 max;
544 HV *stash;
545 GV *gv;
546 CV *cv;
547 I32 gimme = GIMME;
548 OP* nextop = op->op_next;
549
550 if (gimme != G_ARRAY) {
551 SP = MARK;
552 RETPUSHUNDEF;
553 }
554
555 if (op->op_flags & OPf_STACKED) {
556 ENTER;
557 if (op->op_flags & OPf_SPECIAL) {
558 OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
559 kid = kUNOP->op_first; /* pass rv2gv */
560 kid = kUNOP->op_first; /* pass leave */
561 sortcop = kid->op_next;
562 stash = curcop->cop_stash;
563 }
564 else {
565 cv = sv_2cv(*++MARK, &stash, &gv, 0);
566 if (!(cv && CvROOT(cv))) {
567 if (gv) {
568 SV *tmpstr = sv_newmortal();
569 gv_efullname(tmpstr, gv);
570 if (cv && CvXSUB(cv))
571 DIE("Xsub \"%s\" called in sort", SvPVX(tmpstr));
572 DIE("Undefined sort subroutine \"%s\" called",
573 SvPVX(tmpstr));
574 }
575 if (cv) {
576 if (CvXSUB(cv))
577 DIE("Xsub called in sort");
578 DIE("Undefined subroutine in sort");
579 }
580 DIE("Not a CODE reference in sort");
581 }
582 sortcop = CvSTART(cv);
583 SAVESPTR(CvROOT(cv)->op_ppaddr);
584 CvROOT(cv)->op_ppaddr = ppaddr[OP_NULL];
585
586 SAVESPTR(curpad);
587 curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]);
588 }
589 }
590 else {
591 sortcop = Nullop;
592 stash = curcop->cop_stash;
593 }
594
595 up = myorigmark + 1;
596 while (MARK < SP) { /* This may or may not shift down one here. */
597 /*SUPPRESS 560*/
598 if (*up = *++MARK) { /* Weed out nulls. */
599 if (!SvPOK(*up))
600 (void)sv_2pv(*up, &na);
601 else
602 SvTEMP_off(*up);
603 up++;
604 }
605 }
606 max = --up - myorigmark;
607 if (sortcop) {
608 if (max > 1) {
609 AV *oldstack;
610 CONTEXT *cx;
611 SV** newsp;
612
613 SAVETMPS;
614 SAVESPTR(op);
615
616 oldstack = stack;
617 if (!sortstack) {
618 sortstack = newAV();
619 AvREAL_off(sortstack);
620 av_extend(sortstack, 32);
621 }
622 SWITCHSTACK(stack, sortstack);
623 if (sortstash != stash) {
624 firstgv = gv_fetchpv("a", TRUE, SVt_PV);
625 secondgv = gv_fetchpv("b", TRUE, SVt_PV);
626 sortstash = stash;
627 }
628
629 SAVESPTR(GvSV(firstgv));
630 SAVESPTR(GvSV(secondgv));
631 PUSHBLOCK(cx, CXt_LOOP, stack_base);
632 sortcxix = cxstack_ix;
633
634 qsort((char*)(myorigmark+1), max, sizeof(SV*), sortcv);
635
636 POPBLOCK(cx,curpm);
637 SWITCHSTACK(sortstack, oldstack);
638 }
639 LEAVE;
640 }
641 else {
642 if (max > 1) {
643 MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
644 qsort((char*)(ORIGMARK+1), max, sizeof(SV*), sortcmp);
645 }
646 }
647 stack_sp = ORIGMARK + max;
648 return nextop;
649}
650
651/* Range stuff. */
652
653PP(pp_range)
654{
655 if (GIMME == G_ARRAY)
656 return cCONDOP->op_true;
657 return SvTRUEx(PAD_SV(op->op_targ)) ? cCONDOP->op_false : cCONDOP->op_true;
658}
659
660PP(pp_flip)
661{
662 dSP;
663
664 if (GIMME == G_ARRAY) {
665 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
666 }
667 else {
668 dTOPss;
669 SV *targ = PAD_SV(op->op_targ);
670
671 if ((op->op_private & OPpFLIP_LINENUM)
672 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
673 : SvTRUE(sv) ) {
674 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
675 if (op->op_flags & OPf_SPECIAL) {
676 sv_setiv(targ, 1);
677 RETURN;
678 }
679 else {
680 sv_setiv(targ, 0);
681 sp--;
682 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
683 }
684 }
685 sv_setpv(TARG, "");
686 SETs(targ);
687 RETURN;
688 }
689}
690
691PP(pp_flop)
692{
693 dSP;
694
695 if (GIMME == G_ARRAY) {
696 dPOPPOPssrl;
697 register I32 i;
698 register SV *sv;
699 I32 max;
700
701 if (SvNIOK(left) || !SvPOK(left) ||
702 (looks_like_number(left) && *SvPVX(left) != '0') ) {
703 i = SvIV(left);
704 max = SvIV(right);
705 if (max > i)
706 EXTEND(SP, max - i + 1);
707 while (i <= max) {
708 sv = sv_mortalcopy(&sv_no);
709 sv_setiv(sv,i++);
710 PUSHs(sv);
711 }
712 }
713 else {
714 SV *final = sv_mortalcopy(right);
715 STRLEN len;
716 char *tmps = SvPV(final, len);
717
718 sv = sv_mortalcopy(left);
719 while (!SvNIOK(sv) && SvCUR(sv) <= len &&
720 strNE(SvPVX(sv),tmps) ) {
721 XPUSHs(sv);
722 sv = sv_2mortal(newSVsv(sv));
723 sv_inc(sv);
724 }
725 if (strEQ(SvPVX(sv),tmps))
726 XPUSHs(sv);
727 }
728 }
729 else {
730 dTOPss;
731 SV *targ = PAD_SV(cUNOP->op_first->op_targ);
732 sv_inc(targ);
733 if ((op->op_private & OPpFLIP_LINENUM)
734 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
735 : SvTRUE(sv) ) {
736 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
737 sv_catpv(targ, "E0");
738 }
739 SETs(targ);
740 }
741
742 RETURN;
743}
744
745/* Control. */
746
747static I32
748dopoptolabel(label)
749char *label;
750{
751 register I32 i;
752 register CONTEXT *cx;
753
754 for (i = cxstack_ix; i >= 0; i--) {
755 cx = &cxstack[i];
756 switch (cx->cx_type) {
757 case CXt_SUBST:
758 if (dowarn)
759 warn("Exiting substitution via %s", op_name[op->op_type]);
760 break;
761 case CXt_SUB:
762 if (dowarn)
763 warn("Exiting subroutine via %s", op_name[op->op_type]);
764 break;
765 case CXt_EVAL:
766 if (dowarn)
767 warn("Exiting eval via %s", op_name[op->op_type]);
768 break;
769 case CXt_LOOP:
770 if (!cx->blk_loop.label ||
771 strNE(label, cx->blk_loop.label) ) {
772 DEBUG_l(deb("(Skipping label #%d %s)\n",
773 i, cx->blk_loop.label));
774 continue;
775 }
776 DEBUG_l( deb("(Found label #%d %s)\n", i, label));
777 return i;
778 }
779 }
780 return i;
781}
782
e50aee73
AD		 783I32
784dowantarray()
785{
786 I32 cxix;
787
788 cxix = dopoptosub(cxstack_ix);
789 if (cxix < 0)
790 return G_SCALAR;
791
792 if (cxstack[cxix].blk_gimme == G_ARRAY)
793 return G_ARRAY;
794 else
795 return G_SCALAR;
796}
797
a0d0e21e
LW		 798static I32
799dopoptosub(startingblock)
800I32 startingblock;
801{
802 I32 i;
803 register CONTEXT *cx;
804 for (i = startingblock; i >= 0; i--) {
805 cx = &cxstack[i];
806 switch (cx->cx_type) {
807 default:
808 continue;
809 case CXt_EVAL:
810 case CXt_SUB:
811 DEBUG_l( deb("(Found sub #%d)\n", i));
812 return i;
813 }
814 }
815 return i;
816}
817
818static I32
819dopoptoeval(startingblock)
820I32 startingblock;
821{
822 I32 i;
823 register CONTEXT *cx;
824 for (i = startingblock; i >= 0; i--) {
825 cx = &cxstack[i];
826 switch (cx->cx_type) {
827 default:
828 continue;
829 case CXt_EVAL:
830 DEBUG_l( deb("(Found eval #%d)\n", i));
831 return i;
832 }
833 }
834 return i;
835}
836
837static I32
838dopoptoloop(startingblock)
839I32 startingblock;
840{
841 I32 i;
842 register CONTEXT *cx;
843 for (i = startingblock; i >= 0; i--) {
844 cx = &cxstack[i];
845 switch (cx->cx_type) {
846 case CXt_SUBST:
847 if (dowarn)
848 warn("Exiting substitition via %s", op_name[op->op_type]);
849 break;
850 case CXt_SUB:
851 if (dowarn)
852 warn("Exiting subroutine via %s", op_name[op->op_type]);
853 break;
854 case CXt_EVAL:
855 if (dowarn)
856 warn("Exiting eval via %s", op_name[op->op_type]);
857 break;
858 case CXt_LOOP:
859 DEBUG_l( deb("(Found loop #%d)\n", i));
860 return i;
861 }
862 }
863 return i;
864}
865
866void
867dounwind(cxix)
868I32 cxix;
869{
870 register CONTEXT *cx;
871 SV **newsp;
872 I32 optype;
873
874 while (cxstack_ix > cxix) {
875 cx = &cxstack[cxstack_ix--];
876 DEBUG_l(fprintf(stderr, "Unwinding block %ld, type %s\n", (long) cxstack_ix+1,
877 block_type[cx->cx_type]));
878 /* Note: we don't need to restore the base context info till the end. */
879 switch (cx->cx_type) {
880 case CXt_SUB:
881 POPSUB(cx);
882 break;
883 case CXt_EVAL:
884 POPEVAL(cx);
885 break;
886 case CXt_LOOP:
887 POPLOOP(cx);
888 break;
889 case CXt_SUBST:
890 break;
891 }
892 }
893}
894
ecfc5424 895#ifdef I_STDARG
a0d0e21e
LW		 896OP *
897die(char* pat, ...)
898#else
899/*VARARGS0*/
900OP *
901die(pat, va_alist)
902 char *pat;
903 va_dcl
904#endif
905{
906 va_list args;
907 char *message;
908 int oldrunlevel = runlevel;
909 int was_in_eval = in_eval;
748a9306
LW		 910 HV *stash;
911 GV *gv;
912 CV *cv;
a0d0e21e
LW		 913
914#ifdef I_STDARG
915 va_start(args, pat);
916#else
917 va_start(args);
918#endif
919 message = mess(pat, &args);
920 va_end(args);
748a9306
LW		 921 if (diehook && (cv = sv_2cv(diehook, &stash, &gv, 0)) && !CvDEPTH(cv)) {
922 dSP;
923
924 PUSHMARK(sp);
925 EXTEND(sp, 1);
926 PUSHs(sv_2mortal(newSVpv(message,0)));
927 PUTBACK;
928 perl_call_sv((SV*)cv, G_DISCARD);
929 }
a0d0e21e
LW		 930 restartop = die_where(message);
931 if ((!restartop && was_in_eval) || oldrunlevel > 1)
932 longjmp(top_env, 3);
933 return restartop;
934}
935
936OP *
937die_where(message)
938char *message;
939{
940 if (in_eval) {
941 I32 cxix;
942 register CONTEXT *cx;
943 I32 gimme;
944 SV **newsp;
748a9306
LW		 945 SV *errsv;
946
947 errsv = GvSV(gv_fetchpv("@",TRUE, SVt_PV));
948 /* As destructors may produce errors we set $@ at the last moment */
949 sv_setpv(errsv, ""); /* clear $@ before destroying */
a0d0e21e 950
a0d0e21e
LW		 951 cxix = dopoptoeval(cxstack_ix);
952 if (cxix >= 0) {
953 I32 optype;
954
955 if (cxix < cxstack_ix)
956 dounwind(cxix);
957
958 POPBLOCK(cx,curpm);
959 if (cx->cx_type != CXt_EVAL) {
960 fprintf(stderr, "panic: die %s", message);
961 my_exit(1);
962 }
963 POPEVAL(cx);
964
965 if (gimme == G_SCALAR)
966 *++newsp = &sv_undef;
967 stack_sp = newsp;
968
969 LEAVE;
748a9306
LW		 970
971 sv_insert(errsv, 0, 0, message, strlen(message));
a0d0e21e
LW		 972 if (optype == OP_REQUIRE)
973 DIE("%s", SvPVx(GvSV(gv_fetchpv("@",TRUE, SVt_PV)), na));
974 return pop_return();
975 }
976 }
977 fputs(message, stderr);
978 (void)fflush(stderr);
979 if (e_fp)
980 (void)UNLINK(e_tmpname);
748a9306
LW		 981 statusvalue = SHIFTSTATUS(statusvalue);
982#ifdef VMS
983 my_exit((U32)vaxc$errno?vaxc$errno:errno?errno:statusvalue?statusvalue:SS$_ABORT);
984#else
a0d0e21e 985 my_exit((I32)((errno&255)?errno:((statusvalue&255)?statusvalue:255)));
748a9306 986#endif
a0d0e21e
LW		 987 return 0;
988}
989
990PP(pp_xor)
991{
992 dSP; dPOPTOPssrl;
993 if (SvTRUE(left) != SvTRUE(right))
994 RETSETYES;
995 else
996 RETSETNO;
997}
998
999PP(pp_andassign)
1000{
1001 dSP;
1002 if (!SvTRUE(TOPs))
1003 RETURN;
1004 else
1005 RETURNOP(cLOGOP->op_other);
1006}
1007
1008PP(pp_orassign)
1009{
1010 dSP;
1011 if (SvTRUE(TOPs))
1012 RETURN;
1013 else
1014 RETURNOP(cLOGOP->op_other);
1015}
1016
1017#ifdef DEPRECATED
1018PP(pp_entersubr)
1019{
1020 dSP;
1021 SV** mark = (stack_base + *markstack_ptr + 1);
1022 SV* cv = *mark;
1023 while (mark < sp) { /* emulate old interface */
1024 *mark = mark[1];
1025 mark++;
1026 }
1027 *sp = cv;
1028 return pp_entersub();
1029}
1030#endif
1031
1032PP(pp_caller)
1033{
1034 dSP;
1035 register I32 cxix = dopoptosub(cxstack_ix);
1036 register CONTEXT *cx;
1037 I32 dbcxix;
1038 SV *sv;
1039 I32 count = 0;
1040
1041 if (MAXARG)
1042 count = POPi;
1043 EXTEND(SP, 6);
1044 for (;;) {
1045 if (cxix < 0) {
1046 if (GIMME != G_ARRAY)
1047 RETPUSHUNDEF;
1048 RETURN;
1049 }
1050 if (DBsub && cxix >= 0 &&
1051 cxstack[cxix].blk_sub.cv == GvCV(DBsub))
1052 count++;
1053 if (!count--)
1054 break;
1055 cxix = dopoptosub(cxix - 1);
1056 }
1057 cx = &cxstack[cxix];
1058 if (GIMME != G_ARRAY) {
1059 dTARGET;
1060
1061 sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
1062 PUSHs(TARG);
1063 RETURN;
1064 }
1065 dbcxix = dopoptosub(cxix - 1);
1066 if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
1067 cx = &cxstack[dbcxix];
1068
1069 PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
1070 PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
1071 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1072 if (!MAXARG)
1073 RETURN;
1074 if (cx->cx_type == CXt_SUB) {
1075 sv = NEWSV(49, 0);
1076 gv_efullname(sv, CvGV(cxstack[cxix].blk_sub.cv));
1077 PUSHs(sv_2mortal(sv));
1078 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1079 }
1080 else {
1081 PUSHs(sv_2mortal(newSVpv("(eval)",0)));
1082 PUSHs(sv_2mortal(newSViv(0)));
1083 }
1084 PUSHs(sv_2mortal(newSViv((I32)cx->blk_gimme)));
748a9306
LW		 1085 if (cx->cx_type == CXt_EVAL && cx->blk_eval.old_op_type == OP_ENTEREVAL)
1086 PUSHs(cx->blk_eval.cur_text);
1087
a0d0e21e
LW		 1088 if (cx->blk_sub.hasargs && curcop->cop_stash == debstash) {
1089 AV *ary = cx->blk_sub.argarray;
1090 int off = AvARRAY(ary) - AvALLOC(ary);
1091
1092 if (!dbargs) {
1093 GV* tmpgv;
1094 dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1095 SVt_PVAV)));
1096 SvMULTI_on(tmpgv);
1097 AvREAL_off(dbargs); /* XXX Should be REIFY */
1098 }
1099
1100 if (AvMAX(dbargs) < AvFILL(ary) + off)
1101 av_extend(dbargs, AvFILL(ary) + off);
1102 Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
1103 AvFILL(dbargs) = AvFILL(ary) + off;
1104 }
1105 RETURN;
1106}
1107
1108static int
1109sortcv(a, b)
1110const void *a;
1111const void *b;
1112{
1113 SV **str1 = (SV **) a;
1114 SV **str2 = (SV **) b;
748a9306 1115 I32 oldsaveix = savestack_ix;
a0d0e21e
LW		 1116 I32 oldscopeix = scopestack_ix;
1117 I32 result;
1118 GvSV(firstgv) = *str1;
1119 GvSV(secondgv) = *str2;
1120 stack_sp = stack_base;
1121 op = sortcop;
1122 run();
1123 if (stack_sp != stack_base + 1)
1124 croak("Sort subroutine didn't return single value");
748a9306 1125 if (!SvNIOKp(*stack_sp))
a0d0e21e
LW		 1126 croak("Sort subroutine didn't return a numeric value");
1127 result = SvIV(*stack_sp);
1128 while (scopestack_ix > oldscopeix) {
1129 LEAVE;
1130 }
748a9306 1131 leave_scope(oldsaveix);
a0d0e21e
LW		 1132 return result;
1133}
1134
1135static int
1136sortcmp(a, b)
1137const void *a;
1138const void *b;
1139{
1140 register SV *str1 = *(SV **) a;
1141 register SV *str2 = *(SV **) b;
1142 I32 retval;
1143
1144 if (SvCUR(str1) < SvCUR(str2)) {
1145 /*SUPPRESS 560*/
1146 if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str1)))
1147 return retval;
1148 else
1149 return -1;
1150 }
1151 /*SUPPRESS 560*/
1152 else if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str2)))
1153 return retval;
1154 else if (SvCUR(str1) == SvCUR(str2))
1155 return 0;
1156 else
1157 return 1;
1158}
1159
1160PP(pp_reset)
1161{
1162 dSP;
1163 char *tmps;
1164
1165 if (MAXARG < 1)
1166 tmps = "";
1167 else
1168 tmps = POPp;
1169 sv_reset(tmps, curcop->cop_stash);
1170 PUSHs(&sv_yes);
1171 RETURN;
1172}
1173
1174PP(pp_lineseq)
1175{
1176 return NORMAL;
1177}
1178
1179PP(pp_dbstate)
1180{
1181 curcop = (COP*)op;
1182 TAINT_NOT; /* Each statement is presumed innocent */
1183 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
1184 FREETMPS;
1185
1186 if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
1187 {
1188 SV **sp;
1189 register CV *cv;
1190 register CONTEXT *cx;
748a9306 1191 I32 gimme = G_ARRAY;
a0d0e21e
LW		 1192 I32 hasargs;
1193 GV *gv;
1194
1195 ENTER;
1196 SAVETMPS;
1197
a0d0e21e
LW		 1198 gv = DBgv;
1199 cv = GvCV(gv);
a0d0e21e
LW		 1200 if (!cv)
1201 DIE("No DB::DB routine defined");
1202
8e07c86e 1203 if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */
a0d0e21e 1204 return NORMAL;
748a9306
LW		 1205
1206 SAVEI32(debug);
1207 SAVESPTR(stack_sp);
1208 debug = 0;
1209 hasargs = 0;
1210 sp = stack_sp;
1211
a0d0e21e 1212 push_return(op->op_next);
748a9306 1213 PUSHBLOCK(cx, CXt_SUB, sp);
a0d0e21e
LW		 1214 PUSHSUB(cx);
1215 CvDEPTH(cv)++;
1216 (void)SvREFCNT_inc(cv);
1217 SAVESPTR(curpad);
1218 curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1219 RETURNOP(CvSTART(cv));
1220 }
1221 else
1222 return NORMAL;
1223}
1224
1225PP(pp_scope)
1226{
1227 return NORMAL;
1228}
1229
1230PP(pp_enteriter)
1231{
1232 dSP; dMARK;
1233 register CONTEXT *cx;
1234 I32 gimme = GIMME;
1235 SV **svp;
1236
1237 if (op->op_targ)
1238 svp = &curpad[op->op_targ]; /* "my" variable */
1239 else
1240 svp = &GvSV((GV*)POPs); /* symbol table variable */
1241
1242 ENTER;
1243 SAVETMPS;
1244 ENTER;
1245
1246 PUSHBLOCK(cx, CXt_LOOP, SP);
1247 PUSHLOOP(cx, svp, MARK);
1248 cx->blk_loop.iterary = stack;
1249 cx->blk_loop.iterix = MARK - stack_base;
1250
1251 RETURN;
1252}
1253
1254PP(pp_enterloop)
1255{
1256 dSP;
1257 register CONTEXT *cx;
1258 I32 gimme = GIMME;
1259
1260 ENTER;
1261 SAVETMPS;
1262 ENTER;
1263
1264 PUSHBLOCK(cx, CXt_LOOP, SP);
1265 PUSHLOOP(cx, 0, SP);
1266
1267 RETURN;
1268}
1269
1270PP(pp_leaveloop)
1271{
1272 dSP;
1273 register CONTEXT *cx;
1274 I32 gimme;
1275 SV **newsp;
1276 PMOP *newpm;
1277 SV **mark;
1278
1279 POPBLOCK(cx,newpm);
1280 mark = newsp;
1281 POPLOOP(cx);
1282 if (gimme == G_SCALAR) {
1283 if (op->op_private & OPpLEAVE_VOID)
1284 ;
1285 else {
1286 if (mark < SP)
1287 *++newsp = sv_mortalcopy(*SP);
1288 else
1289 *++newsp = &sv_undef;
1290 }
1291 }
1292 else {
1293 while (mark < SP)
1294 *++newsp = sv_mortalcopy(*++mark);
1295 }
1296 curpm = newpm; /* Don't pop $1 et al till now */
1297 sp = newsp;
1298 LEAVE;
1299 LEAVE;
1300
1301 RETURN;
1302}
1303
1304PP(pp_return)
1305{
1306 dSP; dMARK;
1307 I32 cxix;
1308 register CONTEXT *cx;
1309 I32 gimme;
1310 SV **newsp;
1311 PMOP *newpm;
1312 I32 optype = 0;
1313
1314 if (stack == sortstack) {
1315 if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
16d20bd9
AD		 1316 if (cxstack_ix > sortcxix)
1317 dounwind(sortcxix);
a0d0e21e
LW		 1318 AvARRAY(stack)[1] = *SP;
1319 stack_sp = stack_base + 1;
1320 return 0;
1321 }
1322 }
1323
1324 cxix = dopoptosub(cxstack_ix);
1325 if (cxix < 0)
1326 DIE("Can't return outside a subroutine");
1327 if (cxix < cxstack_ix)
1328 dounwind(cxix);
1329
1330 POPBLOCK(cx,newpm);
1331 switch (cx->cx_type) {
1332 case CXt_SUB:
1333 POPSUB(cx);
1334 break;
1335 case CXt_EVAL:
1336 POPEVAL(cx);
748a9306
LW		 1337 if (optype == OP_REQUIRE &&
1338 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1339 {
1340 char *name = cx->blk_eval.old_name;
1341 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
1342 DIE("%s did not return a true value", name);
1343 }
a0d0e21e
LW		 1344 break;
1345 default:
1346 DIE("panic: return");
1347 break;
1348 }
1349
1350 if (gimme == G_SCALAR) {
1351 if (MARK < SP)
1352 *++newsp = sv_mortalcopy(*SP);
1353 else
1354 *++newsp = &sv_undef;
a0d0e21e
LW		 1355 }
1356 else {
a0d0e21e
LW		 1357 while (MARK < SP)
1358 *++newsp = sv_mortalcopy(*++MARK);
1359 }
1360 curpm = newpm; /* Don't pop $1 et al till now */
1361 stack_sp = newsp;
1362
1363 LEAVE;
1364 return pop_return();
1365}
1366
1367PP(pp_last)
1368{
1369 dSP;
1370 I32 cxix;
1371 register CONTEXT *cx;
1372 I32 gimme;
1373 I32 optype;
1374 OP *nextop;
1375 SV **newsp;
1376 PMOP *newpm;
1377 SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW		 1378
1379 if (op->op_flags & OPf_SPECIAL) {
1380 cxix = dopoptoloop(cxstack_ix);
1381 if (cxix < 0)
1382 DIE("Can't \"last\" outside a block");
1383 }
1384 else {
1385 cxix = dopoptolabel(cPVOP->op_pv);
1386 if (cxix < 0)
1387 DIE("Label not found for \"last %s\"", cPVOP->op_pv);
1388 }
1389 if (cxix < cxstack_ix)
1390 dounwind(cxix);
1391
1392 POPBLOCK(cx,newpm);
1393 switch (cx->cx_type) {
1394 case CXt_LOOP:
1395 POPLOOP(cx);
1396 nextop = cx->blk_loop.last_op->op_next;
1397 LEAVE;
1398 break;
1399 case CXt_EVAL:
1400 POPEVAL(cx);
1401 nextop = pop_return();
1402 break;
1403 case CXt_SUB:
1404 POPSUB(cx);
1405 nextop = pop_return();
1406 break;
1407 default:
1408 DIE("panic: last");
1409 break;
1410 }
1411
1412 if (gimme == G_SCALAR) {
1413 if (mark < SP)
1414 *++newsp = sv_mortalcopy(*SP);
1415 else
1416 *++newsp = &sv_undef;
1417 }
1418 else {
1419 while (mark < SP)
1420 *++newsp = sv_mortalcopy(*++mark);
1421 }
1422 curpm = newpm; /* Don't pop $1 et al till now */
1423 sp = newsp;
1424
1425 LEAVE;
1426 RETURNOP(nextop);
1427}
1428
1429PP(pp_next)
1430{
1431 I32 cxix;
1432 register CONTEXT *cx;
1433 I32 oldsave;
1434
1435 if (op->op_flags & OPf_SPECIAL) {
1436 cxix = dopoptoloop(cxstack_ix);
1437 if (cxix < 0)
1438 DIE("Can't \"next\" outside a block");
1439 }
1440 else {
1441 cxix = dopoptolabel(cPVOP->op_pv);
1442 if (cxix < 0)
1443 DIE("Label not found for \"next %s\"", cPVOP->op_pv);
1444 }
1445 if (cxix < cxstack_ix)
1446 dounwind(cxix);
1447
1448 TOPBLOCK(cx);
1449 oldsave = scopestack[scopestack_ix - 1];
1450 LEAVE_SCOPE(oldsave);
1451 return cx->blk_loop.next_op;
1452}
1453
1454PP(pp_redo)
1455{
1456 I32 cxix;
1457 register CONTEXT *cx;
1458 I32 oldsave;
1459
1460 if (op->op_flags & OPf_SPECIAL) {
1461 cxix = dopoptoloop(cxstack_ix);
1462 if (cxix < 0)
1463 DIE("Can't \"redo\" outside a block");
1464 }
1465 else {
1466 cxix = dopoptolabel(cPVOP->op_pv);
1467 if (cxix < 0)
1468 DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
1469 }
1470 if (cxix < cxstack_ix)
1471 dounwind(cxix);
1472
1473 TOPBLOCK(cx);
1474 oldsave = scopestack[scopestack_ix - 1];
1475 LEAVE_SCOPE(oldsave);
1476 return cx->blk_loop.redo_op;
1477}
1478
1479static OP* lastgotoprobe;
1480
1481static OP *
1482dofindlabel(op,label,opstack)
1483OP *op;
1484char *label;
1485OP **opstack;
1486{
1487 OP *kid;
1488 OP **ops = opstack;
1489
1490 if (op->op_type == OP_LEAVE ||
1491 op->op_type == OP_SCOPE ||
1492 op->op_type == OP_LEAVELOOP ||
1493 op->op_type == OP_LEAVETRY)
1494 *ops++ = cUNOP->op_first;
1495 *ops = 0;
1496 if (op->op_flags & OPf_KIDS) {
1497 /* First try all the kids at this level, since that's likeliest. */
1498 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1499 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1500 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1501 return kid;
1502 }
1503 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1504 if (kid == lastgotoprobe)
1505 continue;
1506 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
1507 if (ops > opstack &&
1508 (ops[-1]->op_type == OP_NEXTSTATE ||
1509 ops[-1]->op_type == OP_DBSTATE))
1510 *ops = kid;
1511 else
1512 *ops++ = kid;
1513 }
1514 if (op = dofindlabel(kid,label,ops))
1515 return op;
1516 }
1517 }
1518 *ops = 0;
1519 return 0;
1520}
1521
1522PP(pp_dump)
1523{
1524 return pp_goto(ARGS);
1525 /*NOTREACHED*/
1526}
1527
1528PP(pp_goto)
1529{
1530 dSP;
1531 OP *retop = 0;
1532 I32 ix;
1533 register CONTEXT *cx;
1534 OP *enterops[64];
1535 char *label;
1536 int do_dump = (op->op_type == OP_DUMP);
1537
1538 label = 0;
1539 if (op->op_flags & OPf_STACKED) {
1540 SV *sv = POPs;
1541
1542 /* This egregious kludge implements goto &subroutine */
1543 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1544 I32 cxix;
1545 register CONTEXT *cx;
1546 CV* cv = (CV*)SvRV(sv);
1547 SV** mark;
1548 I32 items = 0;
1549 I32 oldsave;
1550
4aa0a1f7
AD		 1551 if (!CvROOT(cv) && !CvXSUB(cv)) {
1552 if (CvGV(cv)) {
1553 SV *tmpstr = sv_newmortal();
1554 gv_efullname(tmpstr, CvGV(cv));
1555 DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
1556 }
1557 DIE("Goto undefined subroutine");
1558 }
1559
a0d0e21e
LW		 1560 /* First do some returnish stuff. */
1561 cxix = dopoptosub(cxstack_ix);
1562 if (cxix < 0)
1563 DIE("Can't goto subroutine outside a subroutine");
1564 if (cxix < cxstack_ix)
1565 dounwind(cxix);
1566 TOPBLOCK(cx);
1567 mark = stack_sp;
1568 if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
1569 AV* av = cx->blk_sub.argarray;
1570
1571 items = AvFILL(av) + 1;
1572 Copy(AvARRAY(av), ++stack_sp, items, SV*);
1573 stack_sp += items;
1574 GvAV(defgv) = cx->blk_sub.savearray;
1575 av_clear(av);
1576 AvREAL_off(av);
1577 }
1578 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
1579 SvREFCNT_dec(cx->blk_sub.cv);
1580 oldsave = scopestack[scopestack_ix - 1];
1581 LEAVE_SCOPE(oldsave);
1582
1583 /* Now do some callish stuff. */
1584 SAVETMPS;
1585 if (CvXSUB(cv)) {
1586 if (CvOLDSTYLE(cv)) {
ecfc5424 1587 I32 (*fp3)_((int,int,int));
a0d0e21e
LW		 1588 while (sp > mark) {
1589 sp[1] = sp[0];
1590 sp--;
1591 }
ecfc5424
AD		 1592 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1593 items = (*fp3)(CvXSUBANY(cv).any_i32,
1594 mark - stack_base + 1,
1595 items);
a0d0e21e
LW		 1596 sp = stack_base + items;
1597 }
1598 else {
1599 (void)(*CvXSUB(cv))(cv);
1600 }
1601 LEAVE;
1602 return pop_return();
1603 }
1604 else {
1605 AV* padlist = CvPADLIST(cv);
1606 SV** svp = AvARRAY(padlist);
1607 cx->blk_sub.cv = cv;
1608 cx->blk_sub.olddepth = CvDEPTH(cv);
1609 CvDEPTH(cv)++;
1610 if (CvDEPTH(cv) < 2)
1611 (void)SvREFCNT_inc(cv);
1612 else { /* save temporaries on recursion? */
1613 if (CvDEPTH(cv) == 100 && dowarn)
1614 warn("Deep recursion on subroutine \"%s\"",
1615 GvENAME(CvGV(cv)));
1616 if (CvDEPTH(cv) > AvFILL(padlist)) {
1617 AV *newpad = newAV();
4aa0a1f7 1618 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
a0d0e21e
LW		 1619 I32 ix = AvFILL((AV*)svp[1]);
1620 svp = AvARRAY(svp[0]);
748a9306 1621 for ( ;ix > 0; ix--) {
a0d0e21e 1622 if (svp[ix] != &sv_undef) {
748a9306
LW		 1623 char *name = SvPVX(svp[ix]);
1624 if (SvFLAGS(svp[ix]) & SVf_FAKE) {
1625 /* outer lexical? */
1626 av_store(newpad, ix,
4aa0a1f7 1627 SvREFCNT_inc(oldpad[ix]) );
748a9306
LW		 1628 }
1629 else { /* our own lexical */
1630 if (*name == '@')
1631 av_store(newpad, ix, sv = (SV*)newAV());
1632 else if (*name == '%')
1633 av_store(newpad, ix, sv = (SV*)newHV());
1634 else
1635 av_store(newpad, ix, sv = NEWSV(0,0));
1636 SvPADMY_on(sv);
1637 }
a0d0e21e
LW		 1638 }
1639 else {
748a9306 1640 av_store(newpad, ix, sv = NEWSV(0,0));
a0d0e21e
LW		 1641 SvPADTMP_on(sv);
1642 }
1643 }
1644 if (cx->blk_sub.hasargs) {
1645 AV* av = newAV();
1646 av_extend(av, 0);
1647 av_store(newpad, 0, (SV*)av);
1648 AvFLAGS(av) = AVf_REIFY;
1649 }
1650 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1651 AvFILL(padlist) = CvDEPTH(cv);
1652 svp = AvARRAY(padlist);
1653 }
1654 }
1655 SAVESPTR(curpad);
1656 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1657 if (cx->blk_sub.hasargs) {
1658 AV* av = (AV*)curpad[0];
1659 SV** ary;
1660
1661 cx->blk_sub.savearray = GvAV(defgv);
1662 cx->blk_sub.argarray = av;
1663 GvAV(defgv) = cx->blk_sub.argarray;
1664 ++mark;
1665
1666 if (items >= AvMAX(av) + 1) {
1667 ary = AvALLOC(av);
1668 if (AvARRAY(av) != ary) {
1669 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1670 SvPVX(av) = (char*)ary;
1671 }
1672 if (items >= AvMAX(av) + 1) {
1673 AvMAX(av) = items - 1;
1674 Renew(ary,items+1,SV*);
1675 AvALLOC(av) = ary;
1676 SvPVX(av) = (char*)ary;
1677 }
1678 }
1679 Copy(mark,AvARRAY(av),items,SV*);
1680 AvFILL(av) = items - 1;
1681
1682 while (items--) {
1683 if (*mark)
1684 SvTEMP_off(*mark);
1685 mark++;
1686 }
1687 }
1688 RETURNOP(CvSTART(cv));
1689 }
1690 }
1691 else
1692 label = SvPV(sv,na);
1693 }
1694 else if (op->op_flags & OPf_SPECIAL) {
1695 if (! do_dump)
1696 DIE("goto must have label");
1697 }
1698 else
1699 label = cPVOP->op_pv;
1700
1701 if (label && *label) {
1702 OP *gotoprobe = 0;
1703
1704 /* find label */
1705
1706 lastgotoprobe = 0;
1707 *enterops = 0;
1708 for (ix = cxstack_ix; ix >= 0; ix--) {
1709 cx = &cxstack[ix];
1710 switch (cx->cx_type) {
1711 case CXt_SUB:
1712 gotoprobe = CvROOT(cx->blk_sub.cv);
1713 break;
1714 case CXt_EVAL:
1715 gotoprobe = eval_root; /* XXX not good for nested eval */
1716 break;
1717 case CXt_LOOP:
1718 gotoprobe = cx->blk_oldcop->op_sibling;
1719 break;
1720 case CXt_SUBST:
1721 continue;
1722 case CXt_BLOCK:
1723 if (ix)
1724 gotoprobe = cx->blk_oldcop->op_sibling;
1725 else
1726 gotoprobe = main_root;
1727 break;
1728 default:
1729 if (ix)
1730 DIE("panic: goto");
1731 else
1732 gotoprobe = main_root;
1733 break;
1734 }
1735 retop = dofindlabel(gotoprobe, label, enterops);
1736 if (retop)
1737 break;
1738 lastgotoprobe = gotoprobe;
1739 }
1740 if (!retop)
1741 DIE("Can't find label %s", label);
1742
1743 /* pop unwanted frames */
1744
1745 if (ix < cxstack_ix) {
1746 I32 oldsave;
1747
1748 if (ix < 0)
1749 ix = 0;
1750 dounwind(ix);
1751 TOPBLOCK(cx);
1752 oldsave = scopestack[scopestack_ix];
1753 LEAVE_SCOPE(oldsave);
1754 }
1755
1756 /* push wanted frames */
1757
748a9306 1758 if (*enterops && enterops[1]) {
a0d0e21e 1759 OP *oldop = op;
748a9306 1760 for (ix = 1; enterops[ix]; ix++) {
a0d0e21e
LW		 1761 op = enterops[ix];
1762 (*op->op_ppaddr)();
1763 }
1764 op = oldop;
1765 }
1766 }
1767
1768 if (do_dump) {
1769 restartop = retop;
1770 do_undump = TRUE;
1771
1772 my_unexec();
1773
1774 restartop = 0; /* hmm, must be GNU unexec().. */
1775 do_undump = FALSE;
1776 }
1777
748a9306
LW		 1778 if (stack == signalstack) {
1779 restartop = retop;
1780 longjmp(top_env, 3);
1781 }
1782
a0d0e21e
LW		 1783 RETURNOP(retop);
1784}
1785
1786PP(pp_exit)
1787{
1788 dSP;
1789 I32 anum;
1790
1791 if (MAXARG < 1)
1792 anum = 0;
1793 else
1794 anum = SvIVx(POPs);
1795 my_exit(anum);
1796 PUSHs(&sv_undef);
1797 RETURN;
1798}
1799
1800#ifdef NOTYET
1801PP(pp_nswitch)
1802{
1803 dSP;
1804 double value = SvNVx(GvSV(cCOP->cop_gv));
1805 register I32 match = I_32(value);
1806
1807 if (value < 0.0) {
1808 if (((double)match) > value)
1809 --match; /* was fractional--truncate other way */
1810 }
1811 match -= cCOP->uop.scop.scop_offset;
1812 if (match < 0)
1813 match = 0;
1814 else if (match > cCOP->uop.scop.scop_max)
1815 match = cCOP->uop.scop.scop_max;
1816 op = cCOP->uop.scop.scop_next[match];
1817 RETURNOP(op);
1818}
1819
1820PP(pp_cswitch)
1821{
1822 dSP;
1823 register I32 match;
1824
1825 if (multiline)
1826 op = op->op_next; /* can't assume anything */
1827 else {
1828 match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
1829 match -= cCOP->uop.scop.scop_offset;
1830 if (match < 0)
1831 match = 0;
1832 else if (match > cCOP->uop.scop.scop_max)
1833 match = cCOP->uop.scop.scop_max;
1834 op = cCOP->uop.scop.scop_next[match];
1835 }
1836 RETURNOP(op);
1837}
1838#endif
1839
1840/* Eval. */
1841
1842static void
1843save_lines(array, sv)
1844AV *array;
1845SV *sv;
1846{
1847 register char *s = SvPVX(sv);
1848 register char *send = SvPVX(sv) + SvCUR(sv);
1849 register char *t;
1850 register I32 line = 1;
1851
1852 while (s && s < send) {
1853 SV *tmpstr = NEWSV(85,0);
1854
1855 sv_upgrade(tmpstr, SVt_PVMG);
1856 t = strchr(s, '\n');
1857 if (t)
1858 t++;
1859 else
1860 t = send;
1861
1862 sv_setpvn(tmpstr, s, t - s);
1863 av_store(array, line++, tmpstr);
1864 s = t;
1865 }
1866}
1867
1868static OP *
1869doeval(gimme)
1870int gimme;
1871{
1872 dSP;
1873 OP *saveop = op;
1874 HV *newstash;
748a9306 1875 AV* comppadlist;
a0d0e21e
LW		 1876
1877 in_eval = 1;
1878
1879 /* set up a scratch pad */
1880
1881 SAVEINT(padix);
1882 SAVESPTR(curpad);
1883 SAVESPTR(comppad);
1884 SAVESPTR(comppad_name);
1885 SAVEINT(comppad_name_fill);
1886 SAVEINT(min_intro_pending);
1887 SAVEINT(max_intro_pending);
748a9306
LW		 1888
1889 SAVESPTR(compcv);
1890 compcv = (CV*)NEWSV(1104,0);
1891 sv_upgrade((SV *)compcv, SVt_PVCV);
1892
a0d0e21e
LW		 1893 comppad = newAV();
1894 comppad_name = newAV();
1895 comppad_name_fill = 0;
1896 min_intro_pending = 0;
1897 av_push(comppad, Nullsv);
1898 curpad = AvARRAY(comppad);
1899 padix = 0;
1900
748a9306
LW		 1901 comppadlist = newAV();
1902 AvREAL_off(comppadlist);
8e07c86e
AD		 1903 av_store(comppadlist, 0, (SV*)comppad_name);
1904 av_store(comppadlist, 1, (SV*)comppad);
748a9306 1905 CvPADLIST(compcv) = comppadlist;
8e07c86e 1906 SAVEFREESV(compcv);
748a9306 1907
a0d0e21e
LW		 1908 /* make sure we compile in the right package */
1909
1910 newstash = curcop->cop_stash;
1911 if (curstash != newstash) {
1912 SAVESPTR(curstash);
1913 curstash = newstash;
1914 }
1915 SAVESPTR(beginav);
1916 beginav = newAV();
1917 SAVEFREESV(beginav);
1918
1919 /* try to compile it */
1920
1921 eval_root = Nullop;
1922 error_count = 0;
1923 curcop = &compiling;
1924 curcop->cop_arybase = 0;
1925 rs = "\n";
1926 rslen = 1;
1927 rschar = '\n';
1928 rspara = 0;
1929 sv_setpv(GvSV(gv_fetchpv("@",TRUE, SVt_PV)),"");
1930 if (yyparse() || error_count || !eval_root) {
1931 SV **newsp;
1932 I32 gimme;
1933 CONTEXT *cx;
1934 I32 optype;
1935
1936 op = saveop;
1937 if (eval_root) {
1938 op_free(eval_root);
1939 eval_root = Nullop;
1940 }
1941 POPBLOCK(cx,curpm);
1942 POPEVAL(cx);
1943 pop_return();
1944 lex_end();
1945 LEAVE;
1946 if (optype == OP_REQUIRE)
1947 DIE("%s", SvPVx(GvSV(gv_fetchpv("@",TRUE, SVt_PV)), na));
1948 rs = nrs;
1949 rslen = nrslen;
1950 rschar = nrschar;
1951 rspara = (nrslen == 2);
1952 RETPUSHUNDEF;
1953 }
1954 rs = nrs;
1955 rslen = nrslen;
1956 rschar = nrschar;
1957 rspara = (nrslen == 2);
1958 compiling.cop_line = 0;
a0d0e21e
LW		 1959 SAVEFREEOP(eval_root);
1960 if (gimme & G_ARRAY)
1961 list(eval_root);
1962 else
1963 scalar(eval_root);
1964
1965 DEBUG_x(dump_eval());
1966
1967 /* compiled okay, so do it */
1968
1969 RETURNOP(eval_start);
1970}
1971
1972PP(pp_require)
1973{
1974 dSP;
1975 register CONTEXT *cx;
1976 SV *sv;
1977 char *name;
1978 char *tmpname;
1979 SV** svp;
1980 I32 gimme = G_SCALAR;
1981 FILE *tryrsfp = 0;
1982
1983 sv = POPs;
1984 if (SvNIOK(sv) && !SvPOKp(sv)) {
1985 if (atof(patchlevel) + 0.000999 < SvNV(sv))
1986 DIE("Perl %3.3f required--this is only version %s, stopped",
1987 SvNV(sv),patchlevel);
1988 RETPUSHYES;
1989 }
1990 name = SvPV(sv, na);
1991 if (!*name)
1992 DIE("Null filename used");
1993 if (op->op_type == OP_REQUIRE &&
1994 (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
1995 *svp != &sv_undef)
1996 RETPUSHYES;
1997
1998 /* prepare to compile file */
1999
2000 tmpname = savepv(name);
2001 if (*tmpname == '/' ||
2002 (*tmpname == '.' &&
2003 (tmpname[1] == '/' ||
748a9306
LW		 2004 (tmpname[1] == '.' && tmpname[2] == '/')))
2005#ifdef VMS
2006 || ((*tmpname == '[' || *tmpname == '<') &&
2007 (tmpname[1] == '-' || tmpname[1] == ']' || tmpname[1] == '>'))
2008#endif
2009 )
a0d0e21e
LW		 2010 {
2011 tryrsfp = fopen(tmpname,"r");
2012 }
2013 else {
2014 AV *ar = GvAVn(incgv);
2015 I32 i;
2016
2017 for (i = 0; i <= AvFILL(ar); i++) {
748a9306
LW		 2018#ifdef VMS
2019 if (tounixpath_ts(SvPVx(*av_fetch(ar, i, TRUE), na),buf) == NULL)
2020 croak("Error converting file specification %s",
2021 SvPVx(*av_fetch(ar, i, TRUE), na));
2022 strcat(buf,name);
2023#else
a0d0e21e
LW		 2024 (void)sprintf(buf, "%s/%s",
2025 SvPVx(*av_fetch(ar, i, TRUE), na), name);
748a9306 2026#endif
a0d0e21e
LW		 2027 tryrsfp = fopen(buf, "r");
2028 if (tryrsfp) {
2029 char *s = buf;
2030
2031 if (*s == '.' && s[1] == '/')
2032 s += 2;
2033 Safefree(tmpname);
2034 tmpname = savepv(s);
2035 break;
2036 }
2037 }
2038 }
2039 SAVESPTR(compiling.cop_filegv);
2040 compiling.cop_filegv = gv_fetchfile(tmpname);
2041 Safefree(tmpname);
2042 tmpname = Nullch;
2043 if (!tryrsfp) {
2044 if (op->op_type == OP_REQUIRE) {
2045 sprintf(tokenbuf,"Can't locate %s in @INC", name);
2046 if (instr(tokenbuf,".h "))
2047 strcat(tokenbuf," (change .h to .ph maybe?)");
2048 if (instr(tokenbuf,".ph "))
2049 strcat(tokenbuf," (did you run h2ph?)");
2050 DIE("%s",tokenbuf);
2051 }
2052
2053 RETPUSHUNDEF;
2054 }
2055
2056 /* Assume success here to prevent recursive requirement. */
2057 (void)hv_store(GvHVn(incgv), name, strlen(name),
2058 newSVsv(GvSV(compiling.cop_filegv)), 0 );
2059
2060 ENTER;
2061 SAVETMPS;
2062 lex_start(sv_2mortal(newSVpv("",0)));
e50aee73
AD		 2063 if (rsfp_filters){
2064 save_aptr(&rsfp_filters);
2065 rsfp_filters = NULL;
2066 }
2067
a0d0e21e
LW		 2068 rsfp = tryrsfp;
2069 name = savepv(name);
2070 SAVEFREEPV(name);
2071 SAVEI32(hints);
2072 hints = 0;
2073
2074 /* switch to eval mode */
2075
2076 push_return(op->op_next);
2077 PUSHBLOCK(cx, CXt_EVAL, SP);
2078 PUSHEVAL(cx, name, compiling.cop_filegv);
2079
2080 compiling.cop_line = 0;
2081
2082 PUTBACK;
2083 return doeval(G_SCALAR);
2084}
2085
2086PP(pp_dofile)
2087{
2088 return pp_require(ARGS);
2089}
2090
2091PP(pp_entereval)
2092{
2093 dSP;
2094 register CONTEXT *cx;
2095 dPOPss;
2096 I32 gimme = GIMME;
2097 char tmpbuf[32];
2098 STRLEN len;
2099
2100 if (!SvPV(sv,len) || !len)
2101 RETPUSHUNDEF;
748a9306 2102 TAINT_PROPER("eval");
a0d0e21e
LW		 2103
2104 ENTER;
a0d0e21e 2105 lex_start(sv);
748a9306 2106 SAVETMPS;
a0d0e21e
LW		 2107
2108 /* switch to eval mode */
2109
748a9306 2110 SAVESPTR(compiling.cop_filegv);
a0d0e21e
LW		 2111 sprintf(tmpbuf, "_<(eval %d)", ++evalseq);
2112 compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2113 compiling.cop_line = 1;
2114 SAVEDELETE(defstash, savepv(tmpbuf), strlen(tmpbuf));
2115 SAVEI32(hints);
2116 hints = op->op_targ;
2117
2118 push_return(op->op_next);
2119 PUSHBLOCK(cx, CXt_EVAL, SP);
2120 PUSHEVAL(cx, 0, compiling.cop_filegv);
2121
2122 /* prepare to compile string */
2123
2124 if (perldb && curstash != debstash)
2125 save_lines(GvAV(compiling.cop_filegv), linestr);
2126 PUTBACK;
2127 return doeval(gimme);
2128}
2129
2130PP(pp_leaveeval)
2131{
2132 dSP;
2133 register SV **mark;
2134 SV **newsp;
2135 PMOP *newpm;
2136 I32 gimme;
2137 register CONTEXT *cx;
2138 OP *retop;
2139 I32 optype;
2140
2141 POPBLOCK(cx,newpm);
2142 POPEVAL(cx);
2143 retop = pop_return();
2144
2145 if (gimme == G_SCALAR) {
2146 if (op->op_private & OPpLEAVE_VOID)
2147 MARK = newsp;
2148 else {
2149 MARK = newsp + 1;
2150 if (MARK <= SP) {
2151 if (SvFLAGS(TOPs) & SVs_TEMP)
2152 *MARK = TOPs;
2153 else
2154 *MARK = sv_mortalcopy(TOPs);
2155 }
2156 else {
2157 MEXTEND(mark,0);
2158 *MARK = &sv_undef;
2159 }
2160 }
2161 SP = MARK;
2162 }
2163 else {
2164 for (mark = newsp + 1; mark <= SP; mark++)
2165 if (!(SvFLAGS(TOPs) & SVs_TEMP))
2166 *mark = sv_mortalcopy(*mark);
2167 /* in case LEAVE wipes old return values */
2168 }
2169 curpm = newpm; /* Don't pop $1 et al till now */
2170
2171 if (optype != OP_ENTEREVAL) {
2172 char *name = cx->blk_eval.old_name;
2173
2174 if (!(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp)) {
2175 /* Unassume the success we assumed earlier. */
748a9306 2176 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
a0d0e21e
LW		 2177
2178 if (optype == OP_REQUIRE)
2179 retop = die("%s did not return a true value", name);
2180 }
2181 }
2182
2183 lex_end();
2184 LEAVE;
2185 sv_setpv(GvSV(gv_fetchpv("@",TRUE, SVt_PV)),"");
2186
2187 RETURNOP(retop);
2188}
2189
a0d0e21e
LW		 2190PP(pp_entertry)
2191{
2192 dSP;
2193 register CONTEXT *cx;
2194 I32 gimme = GIMME;
2195
2196 ENTER;
2197 SAVETMPS;
2198
2199 push_return(cLOGOP->op_other->op_next);
2200 PUSHBLOCK(cx, CXt_EVAL, SP);
2201 PUSHEVAL(cx, 0, 0);
2202 eval_root = op; /* Only needed so that goto works right. */
2203
2204 in_eval = 1;
2205 sv_setpv(GvSV(gv_fetchpv("@",TRUE, SVt_PV)),"");
2206 RETURN;
2207}
2208
2209PP(pp_leavetry)
2210{
2211 dSP;
2212 register SV **mark;
2213 SV **newsp;
2214 PMOP *newpm;
2215 I32 gimme;
2216 register CONTEXT *cx;
2217 I32 optype;
2218
2219 POPBLOCK(cx,newpm);
2220 POPEVAL(cx);
2221 pop_return();
2222
2223 if (gimme == G_SCALAR) {
2224 if (op->op_private & OPpLEAVE_VOID)
2225 MARK = newsp;
2226 else {
2227 MARK = newsp + 1;
2228 if (MARK <= SP) {
2229 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
2230 *MARK = TOPs;
2231 else
2232 *MARK = sv_mortalcopy(TOPs);
2233 }
2234 else {
2235 MEXTEND(mark,0);
2236 *MARK = &sv_undef;
2237 }
2238 }
2239 SP = MARK;
2240 }
2241 else {
2242 for (mark = newsp + 1; mark <= SP; mark++)
2243 if (!(SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP)))
2244 *mark = sv_mortalcopy(*mark);
2245 /* in case LEAVE wipes old return values */
2246 }
2247 curpm = newpm; /* Don't pop $1 et al till now */
2248
2249 LEAVE;
2250 sv_setpv(GvSV(gv_fetchpv("@",TRUE, SVt_PV)),"");
2251 RETURN;
2252}
2253
2254static void
2255doparseform(sv)
2256SV *sv;
2257{
2258 STRLEN len;
2259 register char *s = SvPV_force(sv, len);
2260 register char *send = s + len;
2261 register char *base;
2262 register I32 skipspaces = 0;
2263 bool noblank;
2264 bool repeat;
2265 bool postspace = FALSE;
2266 U16 *fops;
2267 register U16 *fpc;
2268 U16 *linepc;
2269 register I32 arg;
2270 bool ischop;
2271
2272 New(804, fops, (send - s)*3+2, U16); /* Almost certainly too long... */
2273 fpc = fops;
2274
2275 if (s < send) {
2276 linepc = fpc;
2277 *fpc++ = FF_LINEMARK;
2278 noblank = repeat = FALSE;
2279 base = s;
2280 }
2281
2282 while (s <= send) {
2283 switch (*s++) {
2284 default:
2285 skipspaces = 0;
2286 continue;
2287
2288 case '~':
2289 if (*s == '~') {
2290 repeat = TRUE;
2291 *s = ' ';
2292 }
2293 noblank = TRUE;
2294 s[-1] = ' ';
2295 /* FALL THROUGH */
2296 case ' ': case '\t':
2297 skipspaces++;
2298 continue;
2299
2300 case '\n': case 0:
2301 arg = s - base;
2302 skipspaces++;
2303 arg -= skipspaces;
2304 if (arg) {
2305 if (postspace) {
2306 *fpc++ = FF_SPACE;
2307 postspace = FALSE;
2308 }
2309 *fpc++ = FF_LITERAL;
2310 *fpc++ = arg;
2311 }
2312 if (s <= send)
2313 skipspaces--;
2314 if (skipspaces) {
2315 *fpc++ = FF_SKIP;
2316 *fpc++ = skipspaces;
2317 }
2318 skipspaces = 0;
2319 if (s <= send)
2320 *fpc++ = FF_NEWLINE;
2321 if (noblank) {
2322 *fpc++ = FF_BLANK;
2323 if (repeat)
2324 arg = fpc - linepc + 1;
2325 else
2326 arg = 0;
2327 *fpc++ = arg;
2328 }
2329 if (s < send) {
2330 linepc = fpc;
2331 *fpc++ = FF_LINEMARK;
2332 noblank = repeat = FALSE;
2333 base = s;
2334 }
2335 else
2336 s++;
2337 continue;
2338
2339 case '@':
2340 case '^':
2341 ischop = s[-1] == '^';
2342
2343 if (postspace) {
2344 *fpc++ = FF_SPACE;
2345 postspace = FALSE;
2346 }
2347 arg = (s - base) - 1;
2348 if (arg) {
2349 *fpc++ = FF_LITERAL;
2350 *fpc++ = arg;
2351 }
2352
2353 base = s - 1;
2354 *fpc++ = FF_FETCH;
2355 if (*s == '*') {
2356 s++;
2357 *fpc++ = 0;
2358 *fpc++ = FF_LINEGLOB;
2359 }
2360 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
2361 arg = ischop ? 512 : 0;
2362 base = s - 1;
2363 while (*s == '#')
2364 s++;
2365 if (*s == '.') {
2366 char *f;
2367 s++;
2368 f = s;
2369 while (*s == '#')
2370 s++;
2371 arg |= 256 + (s - f);
2372 }
2373 *fpc++ = s - base; /* fieldsize for FETCH */
2374 *fpc++ = FF_DECIMAL;
2375 *fpc++ = arg;
2376 }
2377 else {
2378 I32 prespace = 0;
2379 bool ismore = FALSE;
2380
2381 if (*s == '>') {
2382 while (*++s == '>') ;
2383 prespace = FF_SPACE;
2384 }
2385 else if (*s == '|') {
2386 while (*++s == '|') ;
2387 prespace = FF_HALFSPACE;
2388 postspace = TRUE;
2389 }
2390 else {
2391 if (*s == '<')
2392 while (*++s == '<') ;
2393 postspace = TRUE;
2394 }
2395 if (*s == '.' && s[1] == '.' && s[2] == '.') {
2396 s += 3;
2397 ismore = TRUE;
2398 }
2399 *fpc++ = s - base; /* fieldsize for FETCH */
2400
2401 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
2402
2403 if (prespace)
2404 *fpc++ = prespace;
2405 *fpc++ = FF_ITEM;
2406 if (ismore)
2407 *fpc++ = FF_MORE;
2408 if (ischop)
2409 *fpc++ = FF_CHOP;
2410 }
2411 base = s;
2412 skipspaces = 0;
2413 continue;
2414 }
2415 }
2416 *fpc++ = FF_END;
2417
2418 arg = fpc - fops;
2419 { /* need to jump to the next word */
2420 int z;
2421 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
2422 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
2423 s = SvPVX(sv) + SvCUR(sv) + z;
2424 }
2425 Copy(fops, s, arg, U16);
2426 Safefree(fops);
2427 SvCOMPILED_on(sv);
2428}
2429
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