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Document new {,s}printf() behavior
[perl5.git] / pp_ctl.c
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1/* pp_ctl.c
2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
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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
54310121 26#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
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PP
27
28static OP *docatch _((OP *o));
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29static OP *doeval _((int gimme));
30static OP *dofindlabel _((OP *op, char *label, OP **opstack));
31static void doparseform _((SV *sv));
32static I32 dopoptoeval _((I32 startingblock));
33static I32 dopoptolabel _((char *label));
34static I32 dopoptoloop _((I32 startingblock));
35static I32 dopoptosub _((I32 startingblock));
36static void save_lines _((AV *array, SV *sv));
a0d0e21e 37static int sortcv _((const void *, const void *));
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PP
38static int sortcmp _((const void *, const void *));
39static int sortcmp_locale _((const void *, const void *));
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40
41static I32 sortcxix;
42
43PP(pp_wantarray)
44{
45 dSP;
46 I32 cxix;
47 EXTEND(SP, 1);
48
49 cxix = dopoptosub(cxstack_ix);
50 if (cxix < 0)
51 RETPUSHUNDEF;
52
54310121
PP
53 switch (cxstack[cxix].blk_gimme) {
54 case G_ARRAY:
a0d0e21e 55 RETPUSHYES;
54310121 56 case G_SCALAR:
a0d0e21e 57 RETPUSHNO;
54310121
PP
58 default:
59 RETPUSHUNDEF;
60 }
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61}
62
63PP(pp_regcmaybe)
64{
65 return NORMAL;
66}
67
68PP(pp_regcomp) {
69 dSP;
70 register PMOP *pm = (PMOP*)cLOGOP->op_other;
71 register char *t;
72 SV *tmpstr;
73 STRLEN len;
74
75 tmpstr = POPs;
76 t = SvPV(tmpstr, len);
77
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LW
78 /* JMR: Check against the last compiled regexp */
79 if ( ! pm->op_pmregexp || ! pm->op_pmregexp->precomp
80 || strnNE(pm->op_pmregexp->precomp, t, len)
81 || pm->op_pmregexp->precomp[len]) {
82 if (pm->op_pmregexp) {
83 pregfree(pm->op_pmregexp);
84 pm->op_pmregexp = Null(REGEXP*); /* crucial if regcomp aborts */
85 }
a0d0e21e 86
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87 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
88 pm->op_pmregexp = pregcomp(t, t + len, pm);
89 }
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LW
90
91 if (!pm->op_pmregexp->prelen && curpm)
92 pm = curpm;
93 else if (strEQ("\\s+", pm->op_pmregexp->precomp))
94 pm->op_pmflags |= PMf_WHITE;
95
96 if (pm->op_pmflags & PMf_KEEP) {
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97 pm->op_pmflags &= ~PMf_RUNTIME; /* no point compiling again */
98 hoistmust(pm);
99 cLOGOP->op_first->op_next = op->op_next;
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100 }
101 RETURN;
102}
103
104PP(pp_substcont)
105{
106 dSP;
107 register PMOP *pm = (PMOP*) cLOGOP->op_other;
108 register CONTEXT *cx = &cxstack[cxstack_ix];
109 register SV *dstr = cx->sb_dstr;
110 register char *s = cx->sb_s;
111 register char *m = cx->sb_m;
112 char *orig = cx->sb_orig;
c07a80fd 113 register REGEXP *rx = cx->sb_rx;
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114
115 if (cx->sb_iters++) {
116 if (cx->sb_iters > cx->sb_maxiters)
117 DIE("Substitution loop");
118
71be2cbc
PP
119 if (!cx->sb_rxtainted)
120 cx->sb_rxtainted = SvTAINTED(TOPs);
a0d0e21e 121 sv_catsv(dstr, POPs);
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122
123 /* Are we done */
e50aee73 124 if (cx->sb_once || !pregexec(rx, s, cx->sb_strend, orig,
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125 s == m, Nullsv, cx->sb_safebase))
126 {
127 SV *targ = cx->sb_targ;
128 sv_catpvn(dstr, s, cx->sb_strend - s);
748a9306 129
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130 TAINT_IF(cx->sb_rxtainted || rx->exec_tainted);
131
4633a7c4 132 (void)SvOOK_off(targ);
cb0b1708 133 Safefree(SvPVX(targ));
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LW
134 SvPVX(targ) = SvPVX(dstr);
135 SvCUR_set(targ, SvCUR(dstr));
136 SvLEN_set(targ, SvLEN(dstr));
137 SvPVX(dstr) = 0;
138 sv_free(dstr);
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139 (void)SvPOK_only(targ);
140 SvSETMAGIC(targ);
9212bbba 141 SvTAINT(targ);
5cd24f17 142
a0d0e21e 143 PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
4633a7c4 144 LEAVE_SCOPE(cx->sb_oldsave);
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145 POPSUBST(cx);
146 RETURNOP(pm->op_next);
147 }
148 }
149 if (rx->subbase && rx->subbase != orig) {
150 m = s;
151 s = orig;
152 cx->sb_orig = orig = rx->subbase;
153 s = orig + (m - s);
154 cx->sb_strend = s + (cx->sb_strend - m);
155 }
156 cx->sb_m = m = rx->startp[0];
157 sv_catpvn(dstr, s, m-s);
158 cx->sb_s = rx->endp[0];
71be2cbc 159 cx->sb_rxtainted |= rx->exec_tainted;
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160 RETURNOP(pm->op_pmreplstart);
161}
162
163PP(pp_formline)
164{
165 dSP; dMARK; dORIGMARK;
166 register SV *form = *++MARK;
167 register U16 *fpc;
168 register char *t;
169 register char *f;
170 register char *s;
171 register char *send;
172 register I32 arg;
173 register SV *sv;
174 char *item;
175 I32 itemsize;
176 I32 fieldsize;
177 I32 lines = 0;
178 bool chopspace = (strchr(chopset, ' ') != Nullch);
179 char *chophere;
180 char *linemark;
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181 double value;
182 bool gotsome;
183 STRLEN len;
184
55497cff 185 if (!SvMAGICAL(form) || !SvCOMPILED(form)) {
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186 SvREADONLY_off(form);
187 doparseform(form);
188 }
189
190 SvPV_force(formtarget, len);
191 t = SvGROW(formtarget, len + SvCUR(form) + 1); /* XXX SvCUR bad */
192 t += len;
193 f = SvPV(form, len);
194 /* need to jump to the next word */
195 s = f + len + WORD_ALIGN - SvCUR(form) % WORD_ALIGN;
196
197 fpc = (U16*)s;
198
199 for (;;) {
200 DEBUG_f( {
201 char *name = "???";
202 arg = -1;
203 switch (*fpc) {
204 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
205 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
206 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
207 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
208 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
209
210 case FF_CHECKNL: name = "CHECKNL"; break;
211 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
212 case FF_SPACE: name = "SPACE"; break;
213 case FF_HALFSPACE: name = "HALFSPACE"; break;
214 case FF_ITEM: name = "ITEM"; break;
215 case FF_CHOP: name = "CHOP"; break;
216 case FF_LINEGLOB: name = "LINEGLOB"; break;
217 case FF_NEWLINE: name = "NEWLINE"; break;
218 case FF_MORE: name = "MORE"; break;
219 case FF_LINEMARK: name = "LINEMARK"; break;
220 case FF_END: name = "END"; break;
221 }
222 if (arg >= 0)
760ac839 223 PerlIO_printf(PerlIO_stderr(), "%-16s%ld\n", name, (long) arg);
a0d0e21e 224 else
760ac839 225 PerlIO_printf(PerlIO_stderr(), "%-16s\n", name);
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226 } )
227 switch (*fpc++) {
228 case FF_LINEMARK:
229 linemark = t;
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230 lines++;
231 gotsome = FALSE;
232 break;
233
234 case FF_LITERAL:
235 arg = *fpc++;
236 while (arg--)
237 *t++ = *f++;
238 break;
239
240 case FF_SKIP:
241 f += *fpc++;
242 break;
243
244 case FF_FETCH:
245 arg = *fpc++;
246 f += arg;
247 fieldsize = arg;
248
249 if (MARK < SP)
250 sv = *++MARK;
251 else {
252 sv = &sv_no;
253 if (dowarn)
254 warn("Not enough format arguments");
255 }
256 break;
257
258 case FF_CHECKNL:
259 item = s = SvPV(sv, len);
260 itemsize = len;
261 if (itemsize > fieldsize)
262 itemsize = fieldsize;
263 send = chophere = s + itemsize;
264 while (s < send) {
265 if (*s & ~31)
266 gotsome = TRUE;
267 else if (*s == '\n')
268 break;
269 s++;
270 }
271 itemsize = s - item;
272 break;
273
274 case FF_CHECKCHOP:
275 item = s = SvPV(sv, len);
276 itemsize = len;
277 if (itemsize <= fieldsize) {
278 send = chophere = s + itemsize;
279 while (s < send) {
280 if (*s == '\r') {
281 itemsize = s - item;
282 break;
283 }
284 if (*s++ & ~31)
285 gotsome = TRUE;
286 }
287 }
288 else {
289 itemsize = fieldsize;
290 send = chophere = s + itemsize;
291 while (s < send || (s == send && isSPACE(*s))) {
292 if (isSPACE(*s)) {
293 if (chopspace)
294 chophere = s;
295 if (*s == '\r')
296 break;
297 }
298 else {
299 if (*s & ~31)
300 gotsome = TRUE;
301 if (strchr(chopset, *s))
302 chophere = s + 1;
303 }
304 s++;
305 }
306 itemsize = chophere - item;
307 }
308 break;
309
310 case FF_SPACE:
311 arg = fieldsize - itemsize;
312 if (arg) {
313 fieldsize -= arg;
314 while (arg-- > 0)
315 *t++ = ' ';
316 }
317 break;
318
319 case FF_HALFSPACE:
320 arg = fieldsize - itemsize;
321 if (arg) {
322 arg /= 2;
323 fieldsize -= arg;
324 while (arg-- > 0)
325 *t++ = ' ';
326 }
327 break;
328
329 case FF_ITEM:
330 arg = itemsize;
331 s = item;
332 while (arg--) {
333#if 'z' - 'a' != 25
334 int ch = *t++ = *s++;
335 if (!iscntrl(ch))
336 t[-1] = ' ';
337#else
338 if ( !((*t++ = *s++) & ~31) )
339 t[-1] = ' ';
340#endif
341
342 }
343 break;
344
345 case FF_CHOP:
346 s = chophere;
347 if (chopspace) {
348 while (*s && isSPACE(*s))
349 s++;
350 }
351 sv_chop(sv,s);
352 break;
353
354 case FF_LINEGLOB:
355 item = s = SvPV(sv, len);
356 itemsize = len;
357 if (itemsize) {
358 gotsome = TRUE;
359 send = s + itemsize;
360 while (s < send) {
361 if (*s++ == '\n') {
362 if (s == send)
363 itemsize--;
364 else
365 lines++;
366 }
367 }
368 SvCUR_set(formtarget, t - SvPVX(formtarget));
369 sv_catpvn(formtarget, item, itemsize);
370 SvGROW(formtarget, SvCUR(formtarget) + SvCUR(form) + 1);
371 t = SvPVX(formtarget) + SvCUR(formtarget);
372 }
373 break;
374
375 case FF_DECIMAL:
376 /* If the field is marked with ^ and the value is undefined,
377 blank it out. */
378 arg = *fpc++;
379 if ((arg & 512) && !SvOK(sv)) {
380 arg = fieldsize;
381 while (arg--)
382 *t++ = ' ';
383 break;
384 }
385 gotsome = TRUE;
386 value = SvNV(sv);
bbce6d69 387 /* Formats aren't yet marked for locales, so assume "yes". */
36477c24 388 SET_NUMERIC_LOCAL();
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389 if (arg & 256) {
390 sprintf(t, "%#*.*f", (int) fieldsize, (int) arg & 255, value);
391 } else {
392 sprintf(t, "%*.0f", (int) fieldsize, value);
393 }
394 t += fieldsize;
395 break;
396
397 case FF_NEWLINE:
398 f++;
399 while (t-- > linemark && *t == ' ') ;
400 t++;
401 *t++ = '\n';
402 break;
403
404 case FF_BLANK:
405 arg = *fpc++;
406 if (gotsome) {
407 if (arg) { /* repeat until fields exhausted? */
408 *t = '\0';
409 SvCUR_set(formtarget, t - SvPVX(formtarget));
410 lines += FmLINES(formtarget);
411 if (lines == 200) {
412 arg = t - linemark;
413 if (strnEQ(linemark, linemark - arg, arg))
414 DIE("Runaway format");
415 }
416 FmLINES(formtarget) = lines;
417 SP = ORIGMARK;
418 RETURNOP(cLISTOP->op_first);
419 }
420 }
421 else {
422 t = linemark;
423 lines--;
424 }
425 break;
426
427 case FF_MORE:
428 if (itemsize) {
429 arg = fieldsize - itemsize;
430 if (arg) {
431 fieldsize -= arg;
432 while (arg-- > 0)
433 *t++ = ' ';
434 }
435 s = t - 3;
436 if (strnEQ(s," ",3)) {
437 while (s > SvPVX(formtarget) && isSPACE(s[-1]))
438 s--;
439 }
440 *s++ = '.';
441 *s++ = '.';
442 *s++ = '.';
443 }
444 break;
445
446 case FF_END:
447 *t = '\0';
448 SvCUR_set(formtarget, t - SvPVX(formtarget));
449 FmLINES(formtarget) += lines;
450 SP = ORIGMARK;
451 RETPUSHYES;
452 }
453 }
454}
455
456PP(pp_grepstart)
457{
458 dSP;
459 SV *src;
460
461 if (stack_base + *markstack_ptr == sp) {
462 (void)POPMARK;
54310121 463 if (GIMME_V == G_SCALAR)
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LW
464 XPUSHs(&sv_no);
465 RETURNOP(op->op_next->op_next);
466 }
467 stack_sp = stack_base + *markstack_ptr + 1;
468 pp_pushmark(); /* push dst */
469 pp_pushmark(); /* push src */
470 ENTER; /* enter outer scope */
471
472 SAVETMPS;
473 SAVESPTR(GvSV(defgv));
474
475 ENTER; /* enter inner scope */
476 SAVESPTR(curpm);
477
478 src = stack_base[*markstack_ptr];
479 SvTEMP_off(src);
480 GvSV(defgv) = src;
481
482 PUTBACK;
483 if (op->op_type == OP_MAPSTART)
484 pp_pushmark(); /* push top */
485 return ((LOGOP*)op->op_next)->op_other;
486}
487
488PP(pp_mapstart)
489{
490 DIE("panic: mapstart"); /* uses grepstart */
491}
492
493PP(pp_mapwhile)
494{
495 dSP;
496 I32 diff = (sp - stack_base) - *markstack_ptr;
497 I32 count;
498 I32 shift;
499 SV** src;
500 SV** dst;
501
502 ++markstack_ptr[-1];
503 if (diff) {
504 if (diff > markstack_ptr[-1] - markstack_ptr[-2]) {
505 shift = diff - (markstack_ptr[-1] - markstack_ptr[-2]);
506 count = (sp - stack_base) - markstack_ptr[-1] + 2;
507
508 EXTEND(sp,shift);
509 src = sp;
510 dst = (sp += shift);
511 markstack_ptr[-1] += shift;
512 *markstack_ptr += shift;
513 while (--count)
514 *dst-- = *src--;
515 }
516 dst = stack_base + (markstack_ptr[-2] += diff) - 1;
517 ++diff;
518 while (--diff)
519 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
520 }
521 LEAVE; /* exit inner scope */
522
523 /* All done yet? */
524 if (markstack_ptr[-1] > *markstack_ptr) {
525 I32 items;
54310121 526 I32 gimme = GIMME_V;
a0d0e21e
LW
527
528 (void)POPMARK; /* pop top */
529 LEAVE; /* exit outer scope */
530 (void)POPMARK; /* pop src */
531 items = --*markstack_ptr - markstack_ptr[-1];
532 (void)POPMARK; /* pop dst */
533 SP = stack_base + POPMARK; /* pop original mark */
54310121 534 if (gimme == G_SCALAR) {
a0d0e21e
LW
535 dTARGET;
536 XPUSHi(items);
a0d0e21e 537 }
54310121
PP
538 else if (gimme == G_ARRAY)
539 SP += items;
a0d0e21e
LW
540 RETURN;
541 }
542 else {
543 SV *src;
544
545 ENTER; /* enter inner scope */
546 SAVESPTR(curpm);
547
548 src = stack_base[markstack_ptr[-1]];
549 SvTEMP_off(src);
550 GvSV(defgv) = src;
551
552 RETURNOP(cLOGOP->op_other);
553 }
554}
555
556
557PP(pp_sort)
558{
559 dSP; dMARK; dORIGMARK;
560 register SV **up;
561 SV **myorigmark = ORIGMARK;
562 register I32 max;
563 HV *stash;
564 GV *gv;
565 CV *cv;
566 I32 gimme = GIMME;
567 OP* nextop = op->op_next;
568
569 if (gimme != G_ARRAY) {
570 SP = MARK;
571 RETPUSHUNDEF;
572 }
573
574 if (op->op_flags & OPf_STACKED) {
575 ENTER;
576 if (op->op_flags & OPf_SPECIAL) {
577 OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
578 kid = kUNOP->op_first; /* pass rv2gv */
579 kid = kUNOP->op_first; /* pass leave */
580 sortcop = kid->op_next;
581 stash = curcop->cop_stash;
582 }
583 else {
584 cv = sv_2cv(*++MARK, &stash, &gv, 0);
585 if (!(cv && CvROOT(cv))) {
586 if (gv) {
587 SV *tmpstr = sv_newmortal();
e5cf08de 588 gv_efullname3(tmpstr, gv, Nullch);
a0d0e21e
LW
589 if (cv && CvXSUB(cv))
590 DIE("Xsub \"%s\" called in sort", SvPVX(tmpstr));
591 DIE("Undefined sort subroutine \"%s\" called",
592 SvPVX(tmpstr));
593 }
594 if (cv) {
595 if (CvXSUB(cv))
596 DIE("Xsub called in sort");
597 DIE("Undefined subroutine in sort");
598 }
599 DIE("Not a CODE reference in sort");
600 }
601 sortcop = CvSTART(cv);
602 SAVESPTR(CvROOT(cv)->op_ppaddr);
603 CvROOT(cv)->op_ppaddr = ppaddr[OP_NULL];
604
605 SAVESPTR(curpad);
606 curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]);
607 }
608 }
609 else {
610 sortcop = Nullop;
611 stash = curcop->cop_stash;
612 }
613
614 up = myorigmark + 1;
615 while (MARK < SP) { /* This may or may not shift down one here. */
616 /*SUPPRESS 560*/
617 if (*up = *++MARK) { /* Weed out nulls. */
9f8d30d5
CS
618 SvTEMP_off(*up);
619 if (!sortcop && !SvPOK(*up))
a0d0e21e 620 (void)sv_2pv(*up, &na);
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LW
621 up++;
622 }
623 }
624 max = --up - myorigmark;
625 if (sortcop) {
626 if (max > 1) {
627 AV *oldstack;
628 CONTEXT *cx;
629 SV** newsp;
54310121 630 bool oldcatch = CATCH_GET;
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LW
631
632 SAVETMPS;
633 SAVESPTR(op);
634
1ce6579f 635 oldstack = curstack;
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LW
636 if (!sortstack) {
637 sortstack = newAV();
638 AvREAL_off(sortstack);
639 av_extend(sortstack, 32);
640 }
54310121 641 CATCH_SET(TRUE);
1ce6579f 642 SWITCHSTACK(curstack, sortstack);
a0d0e21e
LW
643 if (sortstash != stash) {
644 firstgv = gv_fetchpv("a", TRUE, SVt_PV);
645 secondgv = gv_fetchpv("b", TRUE, SVt_PV);
646 sortstash = stash;
647 }
648
649 SAVESPTR(GvSV(firstgv));
650 SAVESPTR(GvSV(secondgv));
0a753a76 651 PUSHBLOCK(cx, CXt_NULL, stack_base);
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LW
652 sortcxix = cxstack_ix;
653
654 qsort((char*)(myorigmark+1), max, sizeof(SV*), sortcv);
655
656 POPBLOCK(cx,curpm);
657 SWITCHSTACK(sortstack, oldstack);
54310121 658 CATCH_SET(oldcatch);
a0d0e21e
LW
659 }
660 LEAVE;
661 }
662 else {
663 if (max > 1) {
664 MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
bbce6d69
PP
665 qsort((char*)(ORIGMARK+1), max, sizeof(SV*),
666 (op->op_private & OPpLOCALE) ? sortcmp_locale : sortcmp);
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LW
667 }
668 }
669 stack_sp = ORIGMARK + max;
670 return nextop;
671}
672
673/* Range stuff. */
674
675PP(pp_range)
676{
677 if (GIMME == G_ARRAY)
678 return cCONDOP->op_true;
679 return SvTRUEx(PAD_SV(op->op_targ)) ? cCONDOP->op_false : cCONDOP->op_true;
680}
681
682PP(pp_flip)
683{
684 dSP;
685
686 if (GIMME == G_ARRAY) {
687 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
688 }
689 else {
690 dTOPss;
691 SV *targ = PAD_SV(op->op_targ);
692
693 if ((op->op_private & OPpFLIP_LINENUM)
694 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
695 : SvTRUE(sv) ) {
696 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
697 if (op->op_flags & OPf_SPECIAL) {
698 sv_setiv(targ, 1);
699 RETURN;
700 }
701 else {
702 sv_setiv(targ, 0);
703 sp--;
704 RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
705 }
706 }
707 sv_setpv(TARG, "");
708 SETs(targ);
709 RETURN;
710 }
711}
712
713PP(pp_flop)
714{
715 dSP;
716
717 if (GIMME == G_ARRAY) {
718 dPOPPOPssrl;
719 register I32 i;
720 register SV *sv;
721 I32 max;
722
4633a7c4 723 if (SvNIOKp(left) || !SvPOKp(left) ||
bbce6d69
PP
724 (looks_like_number(left) && *SvPVX(left) != '0') )
725 {
a0d0e21e
LW
726 i = SvIV(left);
727 max = SvIV(right);
bbce6d69
PP
728 if (max >= i) {
729 EXTEND_MORTAL(max - i + 1);
a0d0e21e 730 EXTEND(SP, max - i + 1);
bbce6d69 731 }
a0d0e21e 732 while (i <= max) {
bbce6d69 733 sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
734 PUSHs(sv);
735 }
736 }
737 else {
738 SV *final = sv_mortalcopy(right);
739 STRLEN len;
740 char *tmps = SvPV(final, len);
741
742 sv = sv_mortalcopy(left);
4633a7c4 743 while (!SvNIOKp(sv) && SvCUR(sv) <= len &&
a0d0e21e
LW
744 strNE(SvPVX(sv),tmps) ) {
745 XPUSHs(sv);
746 sv = sv_2mortal(newSVsv(sv));
747 sv_inc(sv);
748 }
749 if (strEQ(SvPVX(sv),tmps))
750 XPUSHs(sv);
751 }
752 }
753 else {
754 dTOPss;
755 SV *targ = PAD_SV(cUNOP->op_first->op_targ);
756 sv_inc(targ);
757 if ((op->op_private & OPpFLIP_LINENUM)
758 ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
759 : SvTRUE(sv) ) {
760 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
761 sv_catpv(targ, "E0");
762 }
763 SETs(targ);
764 }
765
766 RETURN;
767}
768
769/* Control. */
770
771static I32
772dopoptolabel(label)
773char *label;
774{
775 register I32 i;
776 register CONTEXT *cx;
777
778 for (i = cxstack_ix; i >= 0; i--) {
779 cx = &cxstack[i];
780 switch (cx->cx_type) {
781 case CXt_SUBST:
782 if (dowarn)
783 warn("Exiting substitution via %s", op_name[op->op_type]);
784 break;
785 case CXt_SUB:
786 if (dowarn)
787 warn("Exiting subroutine via %s", op_name[op->op_type]);
788 break;
789 case CXt_EVAL:
790 if (dowarn)
791 warn("Exiting eval via %s", op_name[op->op_type]);
792 break;
0a753a76
PP
793 case CXt_NULL:
794 if (dowarn)
795 warn("Exiting pseudo-block via %s", op_name[op->op_type]);
796 return -1;
a0d0e21e
LW
797 case CXt_LOOP:
798 if (!cx->blk_loop.label ||
799 strNE(label, cx->blk_loop.label) ) {
68dc0745
PP
800 DEBUG_l(deb("(Skipping label #%ld %s)\n",
801 (long)i, cx->blk_loop.label));
a0d0e21e
LW
802 continue;
803 }
68dc0745 804 DEBUG_l( deb("(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
805 return i;
806 }
807 }
808 return i;
809}
810
e50aee73
AD
811I32
812dowantarray()
813{
54310121
PP
814 I32 gimme = block_gimme();
815 return (gimme == G_VOID) ? G_SCALAR : gimme;
816}
817
818I32
819block_gimme()
820{
e50aee73
AD
821 I32 cxix;
822
823 cxix = dopoptosub(cxstack_ix);
824 if (cxix < 0)
46fc3d4c 825 return G_VOID;
e50aee73 826
54310121
PP
827 switch (cxstack[cxix].blk_gimme) {
828 case G_VOID:
829 return G_VOID;
830 case G_SCALAR:
e50aee73 831 return G_SCALAR;
54310121
PP
832 case G_ARRAY:
833 return G_ARRAY;
834 default:
835 croak("panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
836 }
e50aee73
AD
837}
838
a0d0e21e
LW
839static I32
840dopoptosub(startingblock)
841I32 startingblock;
842{
843 I32 i;
844 register CONTEXT *cx;
845 for (i = startingblock; i >= 0; i--) {
846 cx = &cxstack[i];
847 switch (cx->cx_type) {
848 default:
849 continue;
850 case CXt_EVAL:
851 case CXt_SUB:
68dc0745 852 DEBUG_l( deb("(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
853 return i;
854 }
855 }
856 return i;
857}
858
859static I32
860dopoptoeval(startingblock)
861I32 startingblock;
862{
863 I32 i;
864 register CONTEXT *cx;
865 for (i = startingblock; i >= 0; i--) {
866 cx = &cxstack[i];
867 switch (cx->cx_type) {
868 default:
869 continue;
870 case CXt_EVAL:
68dc0745 871 DEBUG_l( deb("(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
872 return i;
873 }
874 }
875 return i;
876}
877
878static I32
879dopoptoloop(startingblock)
880I32 startingblock;
881{
882 I32 i;
883 register CONTEXT *cx;
884 for (i = startingblock; i >= 0; i--) {
885 cx = &cxstack[i];
886 switch (cx->cx_type) {
887 case CXt_SUBST:
888 if (dowarn)
5f05dabc 889 warn("Exiting substitution via %s", op_name[op->op_type]);
a0d0e21e
LW
890 break;
891 case CXt_SUB:
892 if (dowarn)
893 warn("Exiting subroutine via %s", op_name[op->op_type]);
894 break;
895 case CXt_EVAL:
896 if (dowarn)
897 warn("Exiting eval via %s", op_name[op->op_type]);
898 break;
0a753a76
PP
899 case CXt_NULL:
900 if (dowarn)
901 warn("Exiting pseudo-block via %s", op_name[op->op_type]);
902 return -1;
a0d0e21e 903 case CXt_LOOP:
68dc0745 904 DEBUG_l( deb("(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
905 return i;
906 }
907 }
908 return i;
909}
910
911void
912dounwind(cxix)
913I32 cxix;
914{
915 register CONTEXT *cx;
916 SV **newsp;
917 I32 optype;
918
919 while (cxstack_ix > cxix) {
920 cx = &cxstack[cxstack_ix--];
760ac839 921 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n", (long) cxstack_ix+1,
a0d0e21e
LW
922 block_type[cx->cx_type]));
923 /* Note: we don't need to restore the base context info till the end. */
924 switch (cx->cx_type) {
925 case CXt_SUB:
926 POPSUB(cx);
927 break;
928 case CXt_EVAL:
929 POPEVAL(cx);
930 break;
931 case CXt_LOOP:
932 POPLOOP(cx);
933 break;
0a753a76 934 case CXt_NULL:
a0d0e21e
LW
935 case CXt_SUBST:
936 break;
937 }
938 }
939}
940
a0d0e21e
LW
941OP *
942die_where(message)
943char *message;
944{
945 if (in_eval) {
946 I32 cxix;
947 register CONTEXT *cx;
948 I32 gimme;
949 SV **newsp;
950
4633a7c4
LW
951 if (in_eval & 4) {
952 SV **svp;
953 STRLEN klen = strlen(message);
954
955 svp = hv_fetch(GvHV(errgv), message, klen, TRUE);
956 if (svp) {
957 if (!SvIOK(*svp)) {
958 static char prefix[] = "\t(in cleanup) ";
959 sv_upgrade(*svp, SVt_IV);
960 (void)SvIOK_only(*svp);
961 SvGROW(GvSV(errgv), SvCUR(GvSV(errgv))+sizeof(prefix)+klen);
962 sv_catpvn(GvSV(errgv), prefix, sizeof(prefix)-1);
963 sv_catpvn(GvSV(errgv), message, klen);
964 }
965 sv_inc(*svp);
966 }
967 }
968 else
c07a80fd 969 sv_setpv(GvSV(errgv), message);
4633a7c4 970
a0d0e21e
LW
971 cxix = dopoptoeval(cxstack_ix);
972 if (cxix >= 0) {
973 I32 optype;
974
975 if (cxix < cxstack_ix)
976 dounwind(cxix);
977
978 POPBLOCK(cx,curpm);
979 if (cx->cx_type != CXt_EVAL) {
760ac839 980 PerlIO_printf(PerlIO_stderr(), "panic: die %s", message);
a0d0e21e
LW
981 my_exit(1);
982 }
983 POPEVAL(cx);
984
985 if (gimme == G_SCALAR)
986 *++newsp = &sv_undef;
987 stack_sp = newsp;
988
989 LEAVE;
748a9306 990
7a2e2cd6
PP
991 if (optype == OP_REQUIRE) {
992 char* msg = SvPVx(GvSV(errgv), na);
993 DIE("%s", *msg ? msg : "Compilation failed in require");
994 }
a0d0e21e
LW
995 return pop_return();
996 }
997 }
760ac839
LW
998 PerlIO_printf(PerlIO_stderr(), "%s",message);
999 PerlIO_flush(PerlIO_stderr());
f86702cc
PP
1000 my_failure_exit();
1001 /* NOTREACHED */
a0d0e21e
LW
1002 return 0;
1003}
1004
1005PP(pp_xor)
1006{
1007 dSP; dPOPTOPssrl;
1008 if (SvTRUE(left) != SvTRUE(right))
1009 RETSETYES;
1010 else
1011 RETSETNO;
1012}
1013
1014PP(pp_andassign)
1015{
1016 dSP;
1017 if (!SvTRUE(TOPs))
1018 RETURN;
1019 else
1020 RETURNOP(cLOGOP->op_other);
1021}
1022
1023PP(pp_orassign)
1024{
1025 dSP;
1026 if (SvTRUE(TOPs))
1027 RETURN;
1028 else
1029 RETURNOP(cLOGOP->op_other);
1030}
1031
1032#ifdef DEPRECATED
1033PP(pp_entersubr)
1034{
1035 dSP;
1036 SV** mark = (stack_base + *markstack_ptr + 1);
1037 SV* cv = *mark;
1038 while (mark < sp) { /* emulate old interface */
1039 *mark = mark[1];
1040 mark++;
1041 }
1042 *sp = cv;
1043 return pp_entersub();
1044}
1045#endif
1046
1047PP(pp_caller)
1048{
1049 dSP;
1050 register I32 cxix = dopoptosub(cxstack_ix);
1051 register CONTEXT *cx;
1052 I32 dbcxix;
54310121 1053 I32 gimme;
a0d0e21e
LW
1054 SV *sv;
1055 I32 count = 0;
1056
1057 if (MAXARG)
1058 count = POPi;
1059 EXTEND(SP, 6);
1060 for (;;) {
1061 if (cxix < 0) {
1062 if (GIMME != G_ARRAY)
1063 RETPUSHUNDEF;
1064 RETURN;
1065 }
1066 if (DBsub && cxix >= 0 &&
1067 cxstack[cxix].blk_sub.cv == GvCV(DBsub))
1068 count++;
1069 if (!count--)
1070 break;
1071 cxix = dopoptosub(cxix - 1);
1072 }
1073 cx = &cxstack[cxix];
06a5b730
PP
1074 if (cxstack[cxix].cx_type == CXt_SUB) {
1075 dbcxix = dopoptosub(cxix - 1);
1076 /* We expect that cxstack[dbcxix] is CXt_SUB, anyway, the
1077 field below is defined for any cx. */
1078 if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
1079 cx = &cxstack[dbcxix];
1080 }
1081
a0d0e21e
LW
1082 if (GIMME != G_ARRAY) {
1083 dTARGET;
1084
1085 sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
1086 PUSHs(TARG);
1087 RETURN;
1088 }
a0d0e21e
LW
1089
1090 PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
1091 PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
1092 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1093 if (!MAXARG)
1094 RETURN;
06a5b730 1095 if (cx->cx_type == CXt_SUB) { /* So is cxstack[dbcxix]. */
a0d0e21e 1096 sv = NEWSV(49, 0);
e5cf08de 1097 gv_efullname3(sv, CvGV(cxstack[cxix].blk_sub.cv), Nullch);
a0d0e21e
LW
1098 PUSHs(sv_2mortal(sv));
1099 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1100 }
1101 else {
1102 PUSHs(sv_2mortal(newSVpv("(eval)",0)));
1103 PUSHs(sv_2mortal(newSViv(0)));
1104 }
54310121
PP
1105 gimme = (I32)cx->blk_gimme;
1106 if (gimme == G_VOID)
1107 PUSHs(&sv_undef);
1108 else
1109 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
4633a7c4 1110 if (cx->cx_type == CXt_EVAL) {
06a5b730 1111 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1112 PUSHs(cx->blk_eval.cur_text);
06a5b730
PP
1113 PUSHs(&sv_no);
1114 }
1115 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1116 /* Require, put the name. */
1117 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1118 PUSHs(&sv_yes);
1119 }
4633a7c4
LW
1120 }
1121 else if (cx->cx_type == CXt_SUB &&
1122 cx->blk_sub.hasargs &&
1123 curcop->cop_stash == debstash)
1124 {
a0d0e21e
LW
1125 AV *ary = cx->blk_sub.argarray;
1126 int off = AvARRAY(ary) - AvALLOC(ary);
1127
1128 if (!dbargs) {
1129 GV* tmpgv;
1130 dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1131 SVt_PVAV)));
a5f75d66 1132 GvMULTI_on(tmpgv);
a0d0e21e
LW
1133 AvREAL_off(dbargs); /* XXX Should be REIFY */
1134 }
1135
1136 if (AvMAX(dbargs) < AvFILL(ary) + off)
1137 av_extend(dbargs, AvFILL(ary) + off);
1138 Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
1139 AvFILL(dbargs) = AvFILL(ary) + off;
1140 }
1141 RETURN;
1142}
1143
1144static int
1145sortcv(a, b)
1146const void *a;
1147const void *b;
1148{
9607fc9c
PP
1149 SV * const *str1 = (SV * const *)a;
1150 SV * const *str2 = (SV * const *)b;
748a9306 1151 I32 oldsaveix = savestack_ix;
a0d0e21e
LW
1152 I32 oldscopeix = scopestack_ix;
1153 I32 result;
1154 GvSV(firstgv) = *str1;
1155 GvSV(secondgv) = *str2;
1156 stack_sp = stack_base;
1157 op = sortcop;
a6c477ed 1158 runops();
a0d0e21e
LW
1159 if (stack_sp != stack_base + 1)
1160 croak("Sort subroutine didn't return single value");
748a9306 1161 if (!SvNIOKp(*stack_sp))
a0d0e21e
LW
1162 croak("Sort subroutine didn't return a numeric value");
1163 result = SvIV(*stack_sp);
1164 while (scopestack_ix > oldscopeix) {
1165 LEAVE;
1166 }
748a9306 1167 leave_scope(oldsaveix);
a0d0e21e
LW
1168 return result;
1169}
1170
1171static int
1172sortcmp(a, b)
1173const void *a;
1174const void *b;
1175{
9607fc9c 1176 return sv_cmp(*(SV * const *)a, *(SV * const *)b);
bbce6d69 1177}
e5cf08de 1178
bbce6d69
PP
1179static int
1180sortcmp_locale(a, b)
1181const void *a;
1182const void *b;
1183{
9607fc9c 1184 return sv_cmp_locale(*(SV * const *)a, *(SV * const *)b);
a0d0e21e
LW
1185}
1186
1187PP(pp_reset)
1188{
1189 dSP;
1190 char *tmps;
1191
1192 if (MAXARG < 1)
1193 tmps = "";
1194 else
1195 tmps = POPp;
1196 sv_reset(tmps, curcop->cop_stash);
1197 PUSHs(&sv_yes);
1198 RETURN;
1199}
1200
1201PP(pp_lineseq)
1202{
1203 return NORMAL;
1204}
1205
1206PP(pp_dbstate)
1207{
1208 curcop = (COP*)op;
1209 TAINT_NOT; /* Each statement is presumed innocent */
1210 stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
1211 FREETMPS;
1212
1213 if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
1214 {
1215 SV **sp;
1216 register CV *cv;
1217 register CONTEXT *cx;
748a9306 1218 I32 gimme = G_ARRAY;
a0d0e21e
LW
1219 I32 hasargs;
1220 GV *gv;
1221
a0d0e21e
LW
1222 gv = DBgv;
1223 cv = GvCV(gv);
a0d0e21e
LW
1224 if (!cv)
1225 DIE("No DB::DB routine defined");
1226
06a5b730 1227 if (CvDEPTH(cv) >= 1 && !(debug & (1<<30))) /* don't do recursive DB::DB call */
a0d0e21e 1228 return NORMAL;
748a9306 1229
4633a7c4
LW
1230 ENTER;
1231 SAVETMPS;
1232
748a9306 1233 SAVEI32(debug);
55497cff 1234 SAVESTACK_POS();
748a9306
LW
1235 debug = 0;
1236 hasargs = 0;
1237 sp = stack_sp;
1238
a0d0e21e 1239 push_return(op->op_next);
748a9306 1240 PUSHBLOCK(cx, CXt_SUB, sp);
a0d0e21e
LW
1241 PUSHSUB(cx);
1242 CvDEPTH(cv)++;
1243 (void)SvREFCNT_inc(cv);
1244 SAVESPTR(curpad);
1245 curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1246 RETURNOP(CvSTART(cv));
1247 }
1248 else
1249 return NORMAL;
1250}
1251
1252PP(pp_scope)
1253{
1254 return NORMAL;
1255}
1256
1257PP(pp_enteriter)
1258{
1259 dSP; dMARK;
1260 register CONTEXT *cx;
54310121 1261 I32 gimme = GIMME_V;
a0d0e21e
LW
1262 SV **svp;
1263
4633a7c4
LW
1264 ENTER;
1265 SAVETMPS;
1266
a0d0e21e
LW
1267 if (op->op_targ)
1268 svp = &curpad[op->op_targ]; /* "my" variable */
1269 else
1270 svp = &GvSV((GV*)POPs); /* symbol table variable */
1271
4633a7c4
LW
1272 SAVESPTR(*svp);
1273
a0d0e21e
LW
1274 ENTER;
1275
1276 PUSHBLOCK(cx, CXt_LOOP, SP);
1277 PUSHLOOP(cx, svp, MARK);
44a8e56a
PP
1278 if (op->op_flags & OPf_STACKED)
1279 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
4633a7c4 1280 else {
1ce6579f
PP
1281 cx->blk_loop.iterary = curstack;
1282 AvFILL(curstack) = sp - stack_base;
4633a7c4
LW
1283 cx->blk_loop.iterix = MARK - stack_base;
1284 }
a0d0e21e
LW
1285
1286 RETURN;
1287}
1288
1289PP(pp_enterloop)
1290{
1291 dSP;
1292 register CONTEXT *cx;
54310121 1293 I32 gimme = GIMME_V;
a0d0e21e
LW
1294
1295 ENTER;
1296 SAVETMPS;
1297 ENTER;
1298
1299 PUSHBLOCK(cx, CXt_LOOP, SP);
1300 PUSHLOOP(cx, 0, SP);
1301
1302 RETURN;
1303}
1304
1305PP(pp_leaveloop)
1306{
1307 dSP;
1308 register CONTEXT *cx;
f86702cc 1309 struct block_loop cxloop;
a0d0e21e
LW
1310 I32 gimme;
1311 SV **newsp;
1312 PMOP *newpm;
1313 SV **mark;
1314
1315 POPBLOCK(cx,newpm);
4fdae800 1316 mark = newsp;
f86702cc
PP
1317 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1318
54310121
PP
1319 if (gimme == G_VOID)
1320 ; /* do nothing */
1321 else if (gimme == G_SCALAR) {
1322 if (mark < SP)
1323 *++newsp = sv_mortalcopy(*SP);
1324 else
1325 *++newsp = &sv_undef;
a0d0e21e
LW
1326 }
1327 else {
1328 while (mark < SP)
1329 *++newsp = sv_mortalcopy(*++mark);
1330 }
f86702cc
PP
1331 SP = newsp;
1332 PUTBACK;
1333
1334 POPLOOP2(); /* Stack values are safe: release loop vars ... */
1335 curpm = newpm; /* ... and pop $1 et al */
1336
a0d0e21e
LW
1337 LEAVE;
1338 LEAVE;
1339
f86702cc 1340 return NORMAL;
a0d0e21e
LW
1341}
1342
1343PP(pp_return)
1344{
1345 dSP; dMARK;
1346 I32 cxix;
1347 register CONTEXT *cx;
f86702cc
PP
1348 struct block_sub cxsub;
1349 bool popsub2 = FALSE;
a0d0e21e
LW
1350 I32 gimme;
1351 SV **newsp;
1352 PMOP *newpm;
1353 I32 optype = 0;
1354
1ce6579f 1355 if (curstack == sortstack) {
a0d0e21e 1356 if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
16d20bd9
AD
1357 if (cxstack_ix > sortcxix)
1358 dounwind(sortcxix);
1ce6579f 1359 AvARRAY(curstack)[1] = *SP;
a0d0e21e
LW
1360 stack_sp = stack_base + 1;
1361 return 0;
1362 }
1363 }
1364
1365 cxix = dopoptosub(cxstack_ix);
1366 if (cxix < 0)
1367 DIE("Can't return outside a subroutine");
1368 if (cxix < cxstack_ix)
1369 dounwind(cxix);
1370
1371 POPBLOCK(cx,newpm);
1372 switch (cx->cx_type) {
1373 case CXt_SUB:
f86702cc
PP
1374 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1375 popsub2 = TRUE;
a0d0e21e
LW
1376 break;
1377 case CXt_EVAL:
1378 POPEVAL(cx);
748a9306
LW
1379 if (optype == OP_REQUIRE &&
1380 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1381 {
54310121 1382 /* Unassume the success we assumed earlier. */
748a9306
LW
1383 char *name = cx->blk_eval.old_name;
1384 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
1385 DIE("%s did not return a true value", name);
1386 }
a0d0e21e
LW
1387 break;
1388 default:
1389 DIE("panic: return");
a0d0e21e
LW
1390 }
1391
1392 if (gimme == G_SCALAR) {
1393 if (MARK < SP)
f86702cc
PP
1394 *++newsp = (popsub2 && SvTEMP(*SP))
1395 ? *SP : sv_mortalcopy(*SP);
a0d0e21e
LW
1396 else
1397 *++newsp = &sv_undef;
a0d0e21e 1398 }
54310121 1399 else if (gimme == G_ARRAY) {
f86702cc
PP
1400 while (++MARK <= SP)
1401 *++newsp = (popsub2 && SvTEMP(*MARK))
1402 ? *MARK : sv_mortalcopy(*MARK);
a0d0e21e 1403 }
a0d0e21e
LW
1404 stack_sp = newsp;
1405
f86702cc
PP
1406 /* Stack values are safe: */
1407 if (popsub2) {
1408 POPSUB2(); /* release CV and @_ ... */
1409 }
1410 curpm = newpm; /* ... and pop $1 et al */
1411
a0d0e21e
LW
1412 LEAVE;
1413 return pop_return();
1414}
1415
1416PP(pp_last)
1417{
1418 dSP;
1419 I32 cxix;
1420 register CONTEXT *cx;
f86702cc
PP
1421 struct block_loop cxloop;
1422 struct block_sub cxsub;
1423 I32 pop2 = 0;
a0d0e21e
LW
1424 I32 gimme;
1425 I32 optype;
1426 OP *nextop;
1427 SV **newsp;
1428 PMOP *newpm;
1429 SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1430
1431 if (op->op_flags & OPf_SPECIAL) {
1432 cxix = dopoptoloop(cxstack_ix);
1433 if (cxix < 0)
1434 DIE("Can't \"last\" outside a block");
1435 }
1436 else {
1437 cxix = dopoptolabel(cPVOP->op_pv);
1438 if (cxix < 0)
1439 DIE("Label not found for \"last %s\"", cPVOP->op_pv);
1440 }
1441 if (cxix < cxstack_ix)
1442 dounwind(cxix);
1443
1444 POPBLOCK(cx,newpm);
1445 switch (cx->cx_type) {
1446 case CXt_LOOP:
f86702cc
PP
1447 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1448 pop2 = CXt_LOOP;
4fdae800 1449 nextop = cxloop.last_op->op_next;
a0d0e21e 1450 break;
f86702cc
PP
1451 case CXt_SUB:
1452 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1453 pop2 = CXt_SUB;
a0d0e21e
LW
1454 nextop = pop_return();
1455 break;
f86702cc
PP
1456 case CXt_EVAL:
1457 POPEVAL(cx);
a0d0e21e
LW
1458 nextop = pop_return();
1459 break;
1460 default:
1461 DIE("panic: last");
a0d0e21e
LW
1462 }
1463
1464 if (gimme == G_SCALAR) {
f86702cc
PP
1465 if (MARK < SP)
1466 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
1467 ? *SP : sv_mortalcopy(*SP);
a0d0e21e
LW
1468 else
1469 *++newsp = &sv_undef;
1470 }
54310121 1471 else if (gimme == G_ARRAY) {
f86702cc
PP
1472 while (++MARK <= SP)
1473 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
1474 ? *MARK : sv_mortalcopy(*MARK);
1475 }
1476 SP = newsp;
1477 PUTBACK;
1478
1479 /* Stack values are safe: */
1480 switch (pop2) {
1481 case CXt_LOOP:
1482 POPLOOP2(); /* release loop vars ... */
4fdae800 1483 LEAVE;
f86702cc
PP
1484 break;
1485 case CXt_SUB:
1486 POPSUB2(); /* release CV and @_ ... */
1487 break;
a0d0e21e 1488 }
f86702cc 1489 curpm = newpm; /* ... and pop $1 et al */
a0d0e21e
LW
1490
1491 LEAVE;
f86702cc 1492 return nextop;
a0d0e21e
LW
1493}
1494
1495PP(pp_next)
1496{
1497 I32 cxix;
1498 register CONTEXT *cx;
1499 I32 oldsave;
1500
1501 if (op->op_flags & OPf_SPECIAL) {
1502 cxix = dopoptoloop(cxstack_ix);
1503 if (cxix < 0)
1504 DIE("Can't \"next\" outside a block");
1505 }
1506 else {
1507 cxix = dopoptolabel(cPVOP->op_pv);
1508 if (cxix < 0)
1509 DIE("Label not found for \"next %s\"", cPVOP->op_pv);
1510 }
1511 if (cxix < cxstack_ix)
1512 dounwind(cxix);
1513
1514 TOPBLOCK(cx);
1515 oldsave = scopestack[scopestack_ix - 1];
1516 LEAVE_SCOPE(oldsave);
1517 return cx->blk_loop.next_op;
1518}
1519
1520PP(pp_redo)
1521{
1522 I32 cxix;
1523 register CONTEXT *cx;
1524 I32 oldsave;
1525
1526 if (op->op_flags & OPf_SPECIAL) {
1527 cxix = dopoptoloop(cxstack_ix);
1528 if (cxix < 0)
1529 DIE("Can't \"redo\" outside a block");
1530 }
1531 else {
1532 cxix = dopoptolabel(cPVOP->op_pv);
1533 if (cxix < 0)
1534 DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
1535 }
1536 if (cxix < cxstack_ix)
1537 dounwind(cxix);
1538
1539 TOPBLOCK(cx);
1540 oldsave = scopestack[scopestack_ix - 1];
1541 LEAVE_SCOPE(oldsave);
1542 return cx->blk_loop.redo_op;
1543}
1544
1545static OP* lastgotoprobe;
1546
1547static OP *
1548dofindlabel(op,label,opstack)
1549OP *op;
1550char *label;
1551OP **opstack;
1552{
1553 OP *kid;
1554 OP **ops = opstack;
1555
1556 if (op->op_type == OP_LEAVE ||
1557 op->op_type == OP_SCOPE ||
1558 op->op_type == OP_LEAVELOOP ||
1559 op->op_type == OP_LEAVETRY)
1560 *ops++ = cUNOP->op_first;
1561 *ops = 0;
1562 if (op->op_flags & OPf_KIDS) {
1563 /* First try all the kids at this level, since that's likeliest. */
1564 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1565 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1566 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1567 return kid;
1568 }
1569 for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
1570 if (kid == lastgotoprobe)
1571 continue;
1572 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
1573 if (ops > opstack &&
1574 (ops[-1]->op_type == OP_NEXTSTATE ||
1575 ops[-1]->op_type == OP_DBSTATE))
1576 *ops = kid;
1577 else
1578 *ops++ = kid;
1579 }
1580 if (op = dofindlabel(kid,label,ops))
1581 return op;
1582 }
1583 }
1584 *ops = 0;
1585 return 0;
1586}
1587
1588PP(pp_dump)
1589{
1590 return pp_goto(ARGS);
1591 /*NOTREACHED*/
1592}
1593
1594PP(pp_goto)
1595{
1596 dSP;
1597 OP *retop = 0;
1598 I32 ix;
1599 register CONTEXT *cx;
1600 OP *enterops[64];
1601 char *label;
1602 int do_dump = (op->op_type == OP_DUMP);
1603
1604 label = 0;
1605 if (op->op_flags & OPf_STACKED) {
1606 SV *sv = POPs;
1607
1608 /* This egregious kludge implements goto &subroutine */
1609 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1610 I32 cxix;
1611 register CONTEXT *cx;
1612 CV* cv = (CV*)SvRV(sv);
1613 SV** mark;
1614 I32 items = 0;
1615 I32 oldsave;
1616
4aa0a1f7
AD
1617 if (!CvROOT(cv) && !CvXSUB(cv)) {
1618 if (CvGV(cv)) {
1619 SV *tmpstr = sv_newmortal();
e5cf08de 1620 gv_efullname3(tmpstr, CvGV(cv), Nullch);
4aa0a1f7
AD
1621 DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
1622 }
1623 DIE("Goto undefined subroutine");
1624 }
1625
a0d0e21e
LW
1626 /* First do some returnish stuff. */
1627 cxix = dopoptosub(cxstack_ix);
1628 if (cxix < 0)
1629 DIE("Can't goto subroutine outside a subroutine");
1630 if (cxix < cxstack_ix)
1631 dounwind(cxix);
1632 TOPBLOCK(cx);
1633 mark = stack_sp;
1634 if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
1635 AV* av = cx->blk_sub.argarray;
1636
1637 items = AvFILL(av) + 1;
1ce6579f
PP
1638 stack_sp++;
1639 EXTEND(stack_sp, items); /* @_ could have been extended. */
1640 Copy(AvARRAY(av), stack_sp, items, SV*);
a0d0e21e 1641 stack_sp += items;
2c05e328 1642 SvREFCNT_dec(GvAV(defgv));
a0d0e21e 1643 GvAV(defgv) = cx->blk_sub.savearray;
a0d0e21e 1644 AvREAL_off(av);
4633a7c4 1645 av_clear(av);
a0d0e21e
LW
1646 }
1647 if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
1648 SvREFCNT_dec(cx->blk_sub.cv);
1649 oldsave = scopestack[scopestack_ix - 1];
1650 LEAVE_SCOPE(oldsave);
1651
1652 /* Now do some callish stuff. */
1653 SAVETMPS;
1654 if (CvXSUB(cv)) {
1655 if (CvOLDSTYLE(cv)) {
ecfc5424 1656 I32 (*fp3)_((int,int,int));
a0d0e21e
LW
1657 while (sp > mark) {
1658 sp[1] = sp[0];
1659 sp--;
1660 }
ecfc5424
AD
1661 fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
1662 items = (*fp3)(CvXSUBANY(cv).any_i32,
1663 mark - stack_base + 1,
1664 items);
a0d0e21e
LW
1665 sp = stack_base + items;
1666 }
1667 else {
1ce6579f 1668 stack_sp--; /* There is no cv arg. */
a0d0e21e
LW
1669 (void)(*CvXSUB(cv))(cv);
1670 }
1671 LEAVE;
1672 return pop_return();
1673 }
1674 else {
1675 AV* padlist = CvPADLIST(cv);
1676 SV** svp = AvARRAY(padlist);
1677 cx->blk_sub.cv = cv;
1678 cx->blk_sub.olddepth = CvDEPTH(cv);
1679 CvDEPTH(cv)++;
1680 if (CvDEPTH(cv) < 2)
1681 (void)SvREFCNT_inc(cv);
1682 else { /* save temporaries on recursion? */
1683 if (CvDEPTH(cv) == 100 && dowarn)
44a8e56a 1684 sub_crush_depth(cv);
a0d0e21e
LW
1685 if (CvDEPTH(cv) > AvFILL(padlist)) {
1686 AV *newpad = newAV();
4aa0a1f7 1687 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
a0d0e21e
LW
1688 I32 ix = AvFILL((AV*)svp[1]);
1689 svp = AvARRAY(svp[0]);
748a9306 1690 for ( ;ix > 0; ix--) {
a0d0e21e 1691 if (svp[ix] != &sv_undef) {
748a9306 1692 char *name = SvPVX(svp[ix]);
5f05dabc
PP
1693 if ((SvFLAGS(svp[ix]) & SVf_FAKE)
1694 || *name == '&')
1695 {
1696 /* outer lexical or anon code */
748a9306 1697 av_store(newpad, ix,
4aa0a1f7 1698 SvREFCNT_inc(oldpad[ix]) );
748a9306
LW
1699 }
1700 else { /* our own lexical */
1701 if (*name == '@')
1702 av_store(newpad, ix, sv = (SV*)newAV());
1703 else if (*name == '%')
1704 av_store(newpad, ix, sv = (SV*)newHV());
1705 else
1706 av_store(newpad, ix, sv = NEWSV(0,0));
1707 SvPADMY_on(sv);
1708 }
a0d0e21e
LW
1709 }
1710 else {
748a9306 1711 av_store(newpad, ix, sv = NEWSV(0,0));
a0d0e21e
LW
1712 SvPADTMP_on(sv);
1713 }
1714 }
1715 if (cx->blk_sub.hasargs) {
1716 AV* av = newAV();
1717 av_extend(av, 0);
1718 av_store(newpad, 0, (SV*)av);
1719 AvFLAGS(av) = AVf_REIFY;
1720 }
1721 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
1722 AvFILL(padlist) = CvDEPTH(cv);
1723 svp = AvARRAY(padlist);
1724 }
1725 }
1726 SAVESPTR(curpad);
1727 curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
1728 if (cx->blk_sub.hasargs) {
1729 AV* av = (AV*)curpad[0];
1730 SV** ary;
1731
1732 cx->blk_sub.savearray = GvAV(defgv);
1733 cx->blk_sub.argarray = av;
2c05e328 1734 GvAV(defgv) = (AV*)SvREFCNT_inc(av);
a0d0e21e
LW
1735 ++mark;
1736
1737 if (items >= AvMAX(av) + 1) {
1738 ary = AvALLOC(av);
1739 if (AvARRAY(av) != ary) {
1740 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
1741 SvPVX(av) = (char*)ary;
1742 }
1743 if (items >= AvMAX(av) + 1) {
1744 AvMAX(av) = items - 1;
1745 Renew(ary,items+1,SV*);
1746 AvALLOC(av) = ary;
1747 SvPVX(av) = (char*)ary;
1748 }
1749 }
1750 Copy(mark,AvARRAY(av),items,SV*);
1751 AvFILL(av) = items - 1;
1752
1753 while (items--) {
1754 if (*mark)
1755 SvTEMP_off(*mark);
1756 mark++;
1757 }
1758 }
f967eb5f 1759 if (perldb && curstash != debstash) {
44a8e56a
PP
1760 /*
1761 * We do not care about using sv to call CV;
1762 * it's for informational purposes only.
1763 */
1ce6579f
PP
1764 SV *sv = GvSV(DBsub);
1765 save_item(sv);
e5cf08de 1766 gv_efullname3(sv, CvGV(cv), Nullch);
1ce6579f 1767 }
a0d0e21e
LW
1768 RETURNOP(CvSTART(cv));
1769 }
1770 }
1771 else
1772 label = SvPV(sv,na);
1773 }
1774 else if (op->op_flags & OPf_SPECIAL) {
1775 if (! do_dump)
1776 DIE("goto must have label");
1777 }
1778 else
1779 label = cPVOP->op_pv;
1780
1781 if (label && *label) {
1782 OP *gotoprobe = 0;
1783
1784 /* find label */
1785
1786 lastgotoprobe = 0;
1787 *enterops = 0;
1788 for (ix = cxstack_ix; ix >= 0; ix--) {
1789 cx = &cxstack[ix];
1790 switch (cx->cx_type) {
1791 case CXt_SUB:
1792 gotoprobe = CvROOT(cx->blk_sub.cv);
1793 break;
1794 case CXt_EVAL:
1795 gotoprobe = eval_root; /* XXX not good for nested eval */
1796 break;
1797 case CXt_LOOP:
1798 gotoprobe = cx->blk_oldcop->op_sibling;
1799 break;
1800 case CXt_SUBST:
1801 continue;
1802 case CXt_BLOCK:
1803 if (ix)
1804 gotoprobe = cx->blk_oldcop->op_sibling;
1805 else
1806 gotoprobe = main_root;
1807 break;
0a753a76
PP
1808 case CXt_NULL:
1809 DIE("Can't \"goto\" outside a block");
a0d0e21e
LW
1810 default:
1811 if (ix)
1812 DIE("panic: goto");
68dc0745 1813 gotoprobe = main_root;
a0d0e21e
LW
1814 break;
1815 }
1816 retop = dofindlabel(gotoprobe, label, enterops);
1817 if (retop)
1818 break;
1819 lastgotoprobe = gotoprobe;
1820 }
1821 if (!retop)
1822 DIE("Can't find label %s", label);
1823
1824 /* pop unwanted frames */
1825
1826 if (ix < cxstack_ix) {
1827 I32 oldsave;
1828
1829 if (ix < 0)
1830 ix = 0;
1831 dounwind(ix);
1832 TOPBLOCK(cx);
1833 oldsave = scopestack[scopestack_ix];
1834 LEAVE_SCOPE(oldsave);
1835 }
1836
1837 /* push wanted frames */
1838
748a9306 1839 if (*enterops && enterops[1]) {
a0d0e21e 1840 OP *oldop = op;
748a9306 1841 for (ix = 1; enterops[ix]; ix++) {
a0d0e21e
LW
1842 op = enterops[ix];
1843 (*op->op_ppaddr)();
1844 }
1845 op = oldop;
1846 }
1847 }
1848
1849 if (do_dump) {
a5f75d66
AD
1850#ifdef VMS
1851 if (!retop) retop = main_start;
1852#endif
a0d0e21e
LW
1853 restartop = retop;
1854 do_undump = TRUE;
1855
1856 my_unexec();
1857
1858 restartop = 0; /* hmm, must be GNU unexec().. */
1859 do_undump = FALSE;
1860 }
1861
1ce6579f 1862 if (curstack == signalstack) {
748a9306 1863 restartop = retop;
54310121 1864 JMPENV_JUMP(3);
748a9306
LW
1865 }
1866
a0d0e21e
LW
1867 RETURNOP(retop);
1868}
1869
1870PP(pp_exit)
1871{
1872 dSP;
1873 I32 anum;
1874
1875 if (MAXARG < 1)
1876 anum = 0;
ff0cee69 1877 else {
a0d0e21e 1878 anum = SvIVx(POPs);
ff0cee69
PP
1879#ifdef VMSISH_EXIT
1880 if (anum == 1 && VMSISH_EXIT)
1881 anum = 0;
1882#endif
1883 }
a0d0e21e
LW
1884 my_exit(anum);
1885 PUSHs(&sv_undef);
1886 RETURN;
1887}
1888
1889#ifdef NOTYET
1890PP(pp_nswitch)
1891{
1892 dSP;
1893 double value = SvNVx(GvSV(cCOP->cop_gv));
1894 register I32 match = I_32(value);
1895
1896 if (value < 0.0) {
1897 if (((double)match) > value)
1898 --match; /* was fractional--truncate other way */
1899 }
1900 match -= cCOP->uop.scop.scop_offset;
1901 if (match < 0)
1902 match = 0;
1903 else if (match > cCOP->uop.scop.scop_max)
1904 match = cCOP->uop.scop.scop_max;
1905 op = cCOP->uop.scop.scop_next[match];
1906 RETURNOP(op);
1907}
1908
1909PP(pp_cswitch)
1910{
1911 dSP;
1912 register I32 match;
1913
1914 if (multiline)
1915 op = op->op_next; /* can't assume anything */
1916 else {
1917 match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
1918 match -= cCOP->uop.scop.scop_offset;
1919 if (match < 0)
1920 match = 0;
1921 else if (match > cCOP->uop.scop.scop_max)
1922 match = cCOP->uop.scop.scop_max;
1923 op = cCOP->uop.scop.scop_next[match];
1924 }
1925 RETURNOP(op);
1926}
1927#endif
1928
1929/* Eval. */
1930
1931static void
1932save_lines(array, sv)
1933AV *array;
1934SV *sv;
1935{
1936 register char *s = SvPVX(sv);
1937 register char *send = SvPVX(sv) + SvCUR(sv);
1938 register char *t;
1939 register I32 line = 1;
1940
1941 while (s && s < send) {
1942 SV *tmpstr = NEWSV(85,0);
1943
1944 sv_upgrade(tmpstr, SVt_PVMG);
1945 t = strchr(s, '\n');
1946 if (t)
1947 t++;
1948 else
1949 t = send;
1950
1951 sv_setpvn(tmpstr, s, t - s);
1952 av_store(array, line++, tmpstr);
1953 s = t;
1954 }
1955}
1956
1957static OP *
1e422769
PP
1958docatch(o)
1959OP *o;
1960{
1961 int ret;
035902c7 1962 I32 oldrunlevel = runlevel;
1e422769 1963 OP *oldop = op;
54310121 1964 dJMPENV;
1e422769
PP
1965
1966 op = o;
1e422769 1967#ifdef DEBUGGING
54310121 1968 assert(CATCH_GET == TRUE);
035902c7 1969 DEBUG_l(deb("(Setting up local jumplevel, runlevel = %ld)\n", (long)runlevel+1));
1e422769 1970#endif
22921e25
CS
1971 JMPENV_PUSH(ret);
1972 switch (ret) {
1e422769 1973 default: /* topmost level handles it */
54310121 1974 JMPENV_POP;
1e422769 1975 runlevel = oldrunlevel;
1e422769 1976 op = oldop;
54310121 1977 JMPENV_JUMP(ret);
1e422769
PP
1978 /* NOTREACHED */
1979 case 3:
1980 if (!restartop) {
1981 PerlIO_printf(PerlIO_stderr(), "panic: restartop\n");
1982 break;
1983 }
1e422769
PP
1984 op = restartop;
1985 restartop = 0;
1986 /* FALL THROUGH */
1987 case 0:
1988 runops();
1989 break;
1990 }
54310121 1991 JMPENV_POP;
1e422769 1992 runlevel = oldrunlevel;
1e422769
PP
1993 op = oldop;
1994 return Nullop;
1995}
1996
1997static OP *
a0d0e21e
LW
1998doeval(gimme)
1999int gimme;
2000{
2001 dSP;
2002 OP *saveop = op;
2003 HV *newstash;
ff3ff8d1 2004 CV *caller;
748a9306 2005 AV* comppadlist;
a0d0e21e
LW
2006
2007 in_eval = 1;
2008
1ce6579f
PP
2009 PUSHMARK(SP);
2010
a0d0e21e
LW
2011 /* set up a scratch pad */
2012
55497cff 2013 SAVEI32(padix);
a0d0e21e
LW
2014 SAVESPTR(curpad);
2015 SAVESPTR(comppad);
2016 SAVESPTR(comppad_name);
55497cff
PP
2017 SAVEI32(comppad_name_fill);
2018 SAVEI32(min_intro_pending);
2019 SAVEI32(max_intro_pending);
748a9306 2020
ff3ff8d1 2021 caller = compcv;
748a9306
LW
2022 SAVESPTR(compcv);
2023 compcv = (CV*)NEWSV(1104,0);
2024 sv_upgrade((SV *)compcv, SVt_PVCV);
07055b4c 2025 CvUNIQUE_on(compcv);
748a9306 2026
a0d0e21e
LW
2027 comppad = newAV();
2028 comppad_name = newAV();
2029 comppad_name_fill = 0;
2030 min_intro_pending = 0;
2031 av_push(comppad, Nullsv);
2032 curpad = AvARRAY(comppad);
2033 padix = 0;
2034
748a9306
LW
2035 comppadlist = newAV();
2036 AvREAL_off(comppadlist);
8e07c86e
AD
2037 av_store(comppadlist, 0, (SV*)comppad_name);
2038 av_store(comppadlist, 1, (SV*)comppad);
748a9306 2039 CvPADLIST(compcv) = comppadlist;
2c05e328
CS
2040
2041 if (saveop->op_type != OP_REQUIRE)
2042 CvOUTSIDE(compcv) = (CV*)SvREFCNT_inc(caller);
07055b4c 2043
8e07c86e 2044 SAVEFREESV(compcv);
748a9306 2045
a0d0e21e
LW
2046 /* make sure we compile in the right package */
2047
2048 newstash = curcop->cop_stash;
2049 if (curstash != newstash) {
2050 SAVESPTR(curstash);
2051 curstash = newstash;
2052 }
2053 SAVESPTR(beginav);
2054 beginav = newAV();
2055 SAVEFREESV(beginav);
2056
2057 /* try to compile it */
2058
2059 eval_root = Nullop;
2060 error_count = 0;
2061 curcop = &compiling;
2062 curcop->cop_arybase = 0;
c07a80fd
PP
2063 SvREFCNT_dec(rs);
2064 rs = newSVpv("\n", 1);
1ce6579f
PP
2065 if (saveop->op_flags & OPf_SPECIAL)
2066 in_eval |= 4;
2067 else
2068 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2069 if (yyparse() || error_count || !eval_root) {
2070 SV **newsp;
2071 I32 gimme;
2072 CONTEXT *cx;
2073 I32 optype;
2074
2075 op = saveop;
2076 if (eval_root) {
2077 op_free(eval_root);
2078 eval_root = Nullop;
2079 }
1ce6579f 2080 SP = stack_base + POPMARK; /* pop original mark */
a0d0e21e
LW
2081 POPBLOCK(cx,curpm);
2082 POPEVAL(cx);
2083 pop_return();
2084 lex_end();
2085 LEAVE;
7a2e2cd6
PP
2086 if (optype == OP_REQUIRE) {
2087 char* msg = SvPVx(GvSV(errgv), na);
2088 DIE("%s", *msg ? msg : "Compilation failed in require");
2089 }
c07a80fd
PP
2090 SvREFCNT_dec(rs);
2091 rs = SvREFCNT_inc(nrs);
a0d0e21e
LW
2092 RETPUSHUNDEF;
2093 }
c07a80fd
PP
2094 SvREFCNT_dec(rs);
2095 rs = SvREFCNT_inc(nrs);
a0d0e21e 2096 compiling.cop_line = 0;
a0d0e21e 2097 SAVEFREEOP(eval_root);
54310121
PP
2098 if (gimme & G_VOID)
2099 scalarvoid(eval_root);
2100 else if (gimme & G_ARRAY)
a0d0e21e
LW
2101 list(eval_root);
2102 else
2103 scalar(eval_root);
2104
2105 DEBUG_x(dump_eval());
2106
55497cff 2107 /* Register with debugger: */
55497cff
PP
2108 if (perldb && saveop->op_type == OP_REQUIRE) {
2109 CV *cv = perl_get_cv("DB::postponed", FALSE);
55497cff
PP
2110 if (cv) {
2111 dSP;
2112 PUSHMARK(sp);
2113 XPUSHs((SV*)compiling.cop_filegv);
2114 PUTBACK;
2115 perl_call_sv((SV*)cv, G_DISCARD);
2116 }
2117 }
2118
a0d0e21e
LW
2119 /* compiled okay, so do it */
2120
4fdae800
PP
2121 CvDEPTH(compcv) = 1;
2122
1ce6579f 2123 SP = stack_base + POPMARK; /* pop original mark */
a0d0e21e
LW
2124 RETURNOP(eval_start);
2125}
2126
2127PP(pp_require)
2128{
2129 dSP;
2130 register CONTEXT *cx;
2131 SV *sv;
2132 char *name;
46fc3d4c
PP
2133 char *tryname;
2134 SV *namesv = Nullsv;
a0d0e21e
LW
2135 SV** svp;
2136 I32 gimme = G_SCALAR;
760ac839 2137 PerlIO *tryrsfp = 0;
a0d0e21e
LW
2138
2139 sv = POPs;
4633a7c4 2140 if (SvNIOKp(sv) && !SvPOKp(sv)) {
36477c24 2141 SET_NUMERIC_STANDARD();
a5f75d66
AD
2142 if (atof(patchlevel) + 0.00000999 < SvNV(sv))
2143 DIE("Perl %s required--this is only version %s, stopped",
2144 SvPV(sv,na),patchlevel);
a0d0e21e
LW
2145 RETPUSHYES;
2146 }
2147 name = SvPV(sv, na);
2148 if (!*name)
2149 DIE("Null filename used");
4633a7c4 2150 TAINT_PROPER("require");
a0d0e21e
LW
2151 if (op->op_type == OP_REQUIRE &&
2152 (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
2153 *svp != &sv_undef)
2154 RETPUSHYES;
2155
2156 /* prepare to compile file */
2157
46fc3d4c
PP
2158 if (*name == '/' ||
2159 (*name == '.' &&
2160 (name[1] == '/' ||
2161 (name[1] == '.' && name[2] == '/')))
4633a7c4 2162#ifdef DOSISH
46fc3d4c 2163 || (name[0] && name[1] == ':')
4633a7c4 2164#endif
748a9306 2165#ifdef VMS
46fc3d4c
PP
2166 || (strchr(name,':') || ((*name == '[' || *name == '<') &&
2167 (isALNUM(name[1]) || strchr("$-_]>",name[1]))))
748a9306
LW
2168#endif
2169 )
a0d0e21e 2170 {
46fc3d4c
PP
2171 tryname = name;
2172 tryrsfp = PerlIO_open(name,"r");
a0d0e21e
LW
2173 }
2174 else {
2175 AV *ar = GvAVn(incgv);
2176 I32 i;
748a9306 2177#ifdef VMS
46fc3d4c
PP
2178 char *unixname;
2179 if ((unixname = tounixspec(name, Nullch)) != Nullch)
2180#endif
2181 {
2182 namesv = NEWSV(806, 0);
2183 for (i = 0; i <= AvFILL(ar); i++) {
2184 char *dir = SvPVx(*av_fetch(ar, i, TRUE), na);
2185#ifdef VMS
2186 char *unixdir;
2187 if ((unixdir = tounixpath(dir, Nullch)) == Nullch)
2188 continue;
2189 sv_setpv(namesv, unixdir);
2190 sv_catpv(namesv, unixname);
748a9306 2191#else
46fc3d4c 2192 sv_setpvf(namesv, "%s/%s", dir, name);
748a9306 2193#endif
46fc3d4c
PP
2194 tryname = SvPVX(namesv);
2195 tryrsfp = PerlIO_open(tryname, "r");
2196 if (tryrsfp) {
2197 if (tryname[0] == '.' && tryname[1] == '/')
2198 tryname += 2;
2199 break;
2200 }
a0d0e21e
LW
2201 }
2202 }
2203 }
2204 SAVESPTR(compiling.cop_filegv);
46fc3d4c
PP
2205 compiling.cop_filegv = gv_fetchfile(tryrsfp ? tryname : name);
2206 SvREFCNT_dec(namesv);
a0d0e21e
LW
2207 if (!tryrsfp) {
2208 if (op->op_type == OP_REQUIRE) {
46fc3d4c
PP
2209 SV *msg = sv_2mortal(newSVpvf("Can't locate %s in @INC", name));
2210 if (instr(SvPVX(msg), ".h "))
2211 sv_catpv(msg, " (change .h to .ph maybe?)");
2212 if (instr(SvPVX(msg), ".ph "))
2213 sv_catpv(msg, " (did you run h2ph?)");
2214 DIE("%S", msg);
a0d0e21e
LW
2215 }
2216
2217 RETPUSHUNDEF;
2218 }
2219
2220 /* Assume success here to prevent recursive requirement. */
2221 (void)hv_store(GvHVn(incgv), name, strlen(name),
2222 newSVsv(GvSV(compiling.cop_filegv)), 0 );
2223
2224 ENTER;
2225 SAVETMPS;
2226 lex_start(sv_2mortal(newSVpv("",0)));
e50aee73
AD
2227 if (rsfp_filters){
2228 save_aptr(&rsfp_filters);
2229 rsfp_filters = NULL;
2230 }
2231
a0d0e21e
LW
2232 rsfp = tryrsfp;
2233 name = savepv(name);
2234 SAVEFREEPV(name);
2235 SAVEI32(hints);
2236 hints = 0;
2237
2238 /* switch to eval mode */
2239
2240 push_return(op->op_next);
2241 PUSHBLOCK(cx, CXt_EVAL, SP);
2242 PUSHEVAL(cx, name, compiling.cop_filegv);
2243
2244 compiling.cop_line = 0;
2245
2246 PUTBACK;
1e422769 2247 return DOCATCH(doeval(G_SCALAR));
a0d0e21e
LW
2248}
2249
2250PP(pp_dofile)
2251{
2252 return pp_require(ARGS);
2253}
2254
2255PP(pp_entereval)
2256{
2257 dSP;
2258 register CONTEXT *cx;
2259 dPOPss;
54310121 2260 I32 gimme = GIMME_V, was = sub_generation;
46fc3d4c 2261 char tmpbuf[sizeof(unsigned long) * 3 + 12], *safestr;
a0d0e21e 2262 STRLEN len;
55497cff 2263 OP *ret;
a0d0e21e
LW
2264
2265 if (!SvPV(sv,len) || !len)
2266 RETPUSHUNDEF;
748a9306 2267 TAINT_PROPER("eval");
a0d0e21e
LW
2268
2269 ENTER;
a0d0e21e 2270 lex_start(sv);
748a9306 2271 SAVETMPS;
a0d0e21e
LW
2272
2273 /* switch to eval mode */
2274
748a9306 2275 SAVESPTR(compiling.cop_filegv);
ff0cee69 2276 sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++evalseq);
a0d0e21e
LW
2277 compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2278 compiling.cop_line = 1;
55497cff
PP
2279 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2280 deleting the eval's FILEGV from the stash before gv_check() runs
2281 (i.e. before run-time proper). To work around the coredump that
2282 ensues, we always turn GvMULTI_on for any globals that were
2283 introduced within evals. See force_ident(). GSAR 96-10-12 */
2284 safestr = savepv(tmpbuf);
2285 SAVEDELETE(defstash, safestr, strlen(safestr));
a0d0e21e
LW
2286 SAVEI32(hints);
2287 hints = op->op_targ;
2288
2289 push_return(op->op_next);
2290 PUSHBLOCK(cx, CXt_EVAL, SP);
2291 PUSHEVAL(cx, 0, compiling.cop_filegv);
2292
2293 /* prepare to compile string */
2294
2295 if (perldb && curstash != debstash)
2296 save_lines(GvAV(compiling.cop_filegv), linestr);
2297 PUTBACK;
55497cff
PP
2298 ret = doeval(gimme);
2299 if (perldb && was != sub_generation) { /* Some subs defined here. */
2300 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
2301 }
1e422769 2302 return DOCATCH(ret);
a0d0e21e
LW
2303}
2304
2305PP(pp_leaveeval)
2306{
2307 dSP;
2308 register SV **mark;
2309 SV **newsp;
2310 PMOP *newpm;
2311 I32 gimme;
2312 register CONTEXT *cx;
2313 OP *retop;
760ac839 2314 U8 save_flags = op -> op_flags;
a0d0e21e
LW
2315 I32 optype;
2316
2317 POPBLOCK(cx,newpm);
2318 POPEVAL(cx);
2319 retop = pop_return();
2320
54310121
PP
2321 if (gimme == G_VOID)
2322 MARK = newsp;
2323 else if (gimme == G_SCALAR) {
2324 MARK = newsp + 1;
2325 if (MARK <= SP) {
2326 if (SvFLAGS(TOPs) & SVs_TEMP)
2327 *MARK = TOPs;
2328 else
2329 *MARK = sv_mortalcopy(TOPs);
2330 }
a0d0e21e 2331 else {
54310121
PP
2332 MEXTEND(mark,0);
2333 *MARK = &sv_undef;
a0d0e21e 2334 }
a0d0e21e
LW
2335 }
2336 else {
2337 for (mark = newsp + 1; mark <= SP; mark++)
760ac839 2338 if (!(SvFLAGS(*mark) & SVs_TEMP))
a0d0e21e
LW
2339 *mark = sv_mortalcopy(*mark);
2340 /* in case LEAVE wipes old return values */
2341 }
2342 curpm = newpm; /* Don't pop $1 et al till now */
2343
4fdae800
PP
2344#ifdef DEBUGGING
2345 assert(CvDEPTH(compcv) == 1);
2346#endif
2347 CvDEPTH(compcv) = 0;
2348
1ce6579f 2349 if (optype == OP_REQUIRE &&
54310121
PP
2350 !(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp))
2351 {
1ce6579f 2352 /* Unassume the success we assumed earlier. */
54310121 2353 char *name = cx->blk_eval.old_name;
1ce6579f
PP
2354 (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
2355 retop = die("%s did not return a true value", name);
a0d0e21e
LW
2356 }
2357
2358 lex_end();
2359 LEAVE;
4fdae800 2360
760ac839 2361 if (!(save_flags & OPf_SPECIAL))
1ce6579f 2362 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2363
2364 RETURNOP(retop);
2365}
2366
a0d0e21e
LW
2367PP(pp_entertry)
2368{
2369 dSP;
2370 register CONTEXT *cx;
54310121 2371 I32 gimme = GIMME_V;
a0d0e21e
LW
2372
2373 ENTER;
2374 SAVETMPS;
2375
2376 push_return(cLOGOP->op_other->op_next);
2377 PUSHBLOCK(cx, CXt_EVAL, SP);
2378 PUSHEVAL(cx, 0, 0);
2379 eval_root = op; /* Only needed so that goto works right. */
2380
2381 in_eval = 1;
4633a7c4 2382 sv_setpv(GvSV(errgv),"");
1e422769
PP
2383 PUTBACK;
2384 return DOCATCH(op->op_next);
a0d0e21e
LW
2385}
2386
2387PP(pp_leavetry)
2388{
2389 dSP;
2390 register SV **mark;
2391 SV **newsp;
2392 PMOP *newpm;
2393 I32 gimme;
2394 register CONTEXT *cx;
2395 I32 optype;
2396
2397 POPBLOCK(cx,newpm);
2398 POPEVAL(cx);
2399 pop_return();
2400
54310121
PP
2401 if (gimme == G_VOID)
2402 SP = newsp;
2403 else if (gimme == G_SCALAR) {
2404 MARK = newsp + 1;
2405 if (MARK <= SP) {
2406 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
2407 *MARK = TOPs;
2408 else
2409 *MARK = sv_mortalcopy(TOPs);
2410 }
a0d0e21e 2411 else {
54310121
PP
2412 MEXTEND(mark,0);
2413 *MARK = &sv_undef;
a0d0e21e
LW
2414 }
2415 SP = MARK;
2416 }
2417 else {
2418 for (mark = newsp + 1; mark <= SP; mark++)
760ac839 2419 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP)))
a0d0e21e
LW
2420 *mark = sv_mortalcopy(*mark);
2421 /* in case LEAVE wipes old return values */
2422 }
2423 curpm = newpm; /* Don't pop $1 et al till now */
2424
2425 LEAVE;
4633a7c4 2426 sv_setpv(GvSV(errgv),"");
a0d0e21e
LW
2427 RETURN;
2428}
2429
2430static void
2431doparseform(sv)
2432SV *sv;
2433{
2434 STRLEN len;
2435 register char *s = SvPV_force(sv, len);
2436 register char *send = s + len;
2437 register char *base;
2438 register I32 skipspaces = 0;
2439 bool noblank;
2440 bool repeat;
2441 bool postspace = FALSE;
2442 U16 *fops;
2443 register U16 *fpc;
2444 U16 *linepc;
2445 register I32 arg;
2446 bool ischop;
2447
55497cff 2448 if (len == 0)
bbce6d69 2449 croak("Null picture in formline");
55497cff
PP
2450
2451 New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
a0d0e21e
LW
2452 fpc = fops;
2453
2454 if (s < send) {
2455 linepc = fpc;
2456 *fpc++ = FF_LINEMARK;
2457 noblank = repeat = FALSE;
2458 base = s;
2459 }
2460
2461 while (s <= send) {
2462 switch (*s++) {
2463 default:
2464 skipspaces = 0;
2465 continue;
2466
2467 case '~':
2468 if (*s == '~') {
2469 repeat = TRUE;
2470 *s = ' ';
2471 }
2472 noblank = TRUE;
2473 s[-1] = ' ';
2474 /* FALL THROUGH */
2475 case ' ': case '\t':
2476 skipspaces++;
2477 continue;
2478
2479 case '\n': case 0:
2480 arg = s - base;
2481 skipspaces++;
2482 arg -= skipspaces;
2483 if (arg) {
5f05dabc 2484 if (postspace)
a0d0e21e 2485 *fpc++ = FF_SPACE;
a0d0e21e
LW
2486 *fpc++ = FF_LITERAL;
2487 *fpc++ = arg;
2488 }
5f05dabc 2489 postspace = FALSE;
a0d0e21e
LW
2490 if (s <= send)
2491 skipspaces--;
2492 if (skipspaces) {
2493 *fpc++ = FF_SKIP;
2494 *fpc++ = skipspaces;
2495 }
2496 skipspaces = 0;
2497 if (s <= send)
2498 *fpc++ = FF_NEWLINE;
2499 if (noblank) {
2500 *fpc++ = FF_BLANK;
2501 if (repeat)
2502 arg = fpc - linepc + 1;
2503 else
2504 arg = 0;
2505 *fpc++ = arg;
2506 }
2507 if (s < send) {
2508 linepc = fpc;
2509 *fpc++ = FF_LINEMARK;
2510 noblank = repeat = FALSE;
2511 base = s;
2512 }
2513 else
2514 s++;
2515 continue;
2516
2517 case '@':
2518 case '^':
2519 ischop = s[-1] == '^';
2520
2521 if (postspace) {
2522 *fpc++ = FF_SPACE;
2523 postspace = FALSE;
2524 }
2525 arg = (s - base) - 1;
2526 if (arg) {
2527 *fpc++ = FF_LITERAL;
2528 *fpc++ = arg;
2529 }
2530
2531 base = s - 1;
2532 *fpc++ = FF_FETCH;
2533 if (*s == '*') {
2534 s++;
2535 *fpc++ = 0;
2536 *fpc++ = FF_LINEGLOB;
2537 }
2538 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
2539 arg = ischop ? 512 : 0;
2540 base = s - 1;
2541 while (*s == '#')
2542 s++;
2543 if (*s == '.') {
2544 char *f;
2545 s++;
2546 f = s;
2547 while (*s == '#')
2548 s++;
2549 arg |= 256 + (s - f);
2550 }
2551 *fpc++ = s - base; /* fieldsize for FETCH */
2552 *fpc++ = FF_DECIMAL;
2553 *fpc++ = arg;
2554 }
2555 else {
2556 I32 prespace = 0;
2557 bool ismore = FALSE;
2558
2559 if (*s == '>') {
2560 while (*++s == '>') ;
2561 prespace = FF_SPACE;
2562 }
2563 else if (*s == '|') {
2564 while (*++s == '|') ;
2565 prespace = FF_HALFSPACE;
2566 postspace = TRUE;
2567 }
2568 else {
2569 if (*s == '<')
2570 while (*++s == '<') ;
2571 postspace = TRUE;
2572 }
2573 if (*s == '.' && s[1] == '.' && s[2] == '.') {
2574 s += 3;
2575 ismore = TRUE;
2576 }
2577 *fpc++ = s - base; /* fieldsize for FETCH */
2578
2579 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
2580
2581 if (prespace)
2582 *fpc++ = prespace;
2583 *fpc++ = FF_ITEM;
2584 if (ismore)
2585 *fpc++ = FF_MORE;
2586 if (ischop)
2587 *fpc++ = FF_CHOP;
2588 }
2589 base = s;
2590 skipspaces = 0;
2591 continue;
2592 }
2593 }
2594 *fpc++ = FF_END;
2595
2596 arg = fpc - fops;
2597 { /* need to jump to the next word */
2598 int z;
2599 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
2600 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
2601 s = SvPVX(sv) + SvCUR(sv) + z;
2602 }
2603 Copy(fops, s, arg, U16);
2604 Safefree(fops);
55497cff 2605 sv_magic(sv, Nullsv, 'f', Nullch, 0);
a0d0e21e
LW
2606 SvCOMPILED_on(sv);
2607}