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Normalise 3 fatal pack/unpack error messages to "panic: %s"
[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW
1/* pp_ctl.c
2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
4ac71550
TC
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 *
19 * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
a0d0e21e
LW
20 */
21
166f8a29
DM
22/* This file contains control-oriented pp ("push/pop") functions that
23 * execute the opcodes that make up a perl program. A typical pp function
24 * expects to find its arguments on the stack, and usually pushes its
25 * results onto the stack, hence the 'pp' terminology. Each OP structure
26 * contains a pointer to the relevant pp_foo() function.
27 *
28 * Control-oriented means things like pp_enteriter() and pp_next(), which
29 * alter the flow of control of the program.
30 */
31
32
a0d0e21e 33#include "EXTERN.h"
864dbfa3 34#define PERL_IN_PP_CTL_C
a0d0e21e
LW
35#include "perl.h"
36
37#ifndef WORD_ALIGN
dea28490 38#define WORD_ALIGN sizeof(U32)
a0d0e21e
LW
39#endif
40
54310121 41#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 42
94fcd414
NC
43#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
44
a0d0e21e
LW
45PP(pp_wantarray)
46{
97aff369 47 dVAR;
39644a26 48 dSP;
a0d0e21e
LW
49 I32 cxix;
50 EXTEND(SP, 1);
51
52 cxix = dopoptosub(cxstack_ix);
53 if (cxix < 0)
54 RETPUSHUNDEF;
55
54310121
PP
56 switch (cxstack[cxix].blk_gimme) {
57 case G_ARRAY:
a0d0e21e 58 RETPUSHYES;
54310121 59 case G_SCALAR:
a0d0e21e 60 RETPUSHNO;
54310121
PP
61 default:
62 RETPUSHUNDEF;
63 }
a0d0e21e
LW
64}
65
2cd61cdb
IZ
66PP(pp_regcreset)
67{
97aff369 68 dVAR;
2cd61cdb
IZ
69 /* XXXX Should store the old value to allow for tie/overload - and
70 restore in regcomp, where marked with XXXX. */
3280af22 71 PL_reginterp_cnt = 0;
0b4182de 72 TAINT_NOT;
2cd61cdb
IZ
73 return NORMAL;
74}
75
b3eb6a9b
GS
76PP(pp_regcomp)
77{
97aff369 78 dVAR;
39644a26 79 dSP;
a0d0e21e 80 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 81 SV *tmpstr;
84679df5 82 REGEXP *re = NULL;
bfed75c6 83
4b5a0d1c 84 /* prevent recompiling under /o and ithreads. */
3db8f154 85#if defined(USE_ITHREADS)
131b3ad0
DM
86 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
87 if (PL_op->op_flags & OPf_STACKED) {
88 dMARK;
89 SP = MARK;
90 }
91 else
92 (void)POPs;
93 RETURN;
94 }
513629ba 95#endif
131b3ad0
DM
96 if (PL_op->op_flags & OPf_STACKED) {
97 /* multiple args; concatentate them */
98 dMARK; dORIGMARK;
99 tmpstr = PAD_SV(ARGTARG);
76f68e9b 100 sv_setpvs(tmpstr, "");
131b3ad0
DM
101 while (++MARK <= SP) {
102 if (PL_amagic_generation) {
103 SV *sv;
104 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
105 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
106 {
107 sv_setsv(tmpstr, sv);
108 continue;
109 }
110 }
111 sv_catsv(tmpstr, *MARK);
112 }
113 SvSETMAGIC(tmpstr);
114 SP = ORIGMARK;
115 }
116 else
117 tmpstr = POPs;
513629ba 118
b3eb6a9b 119 if (SvROK(tmpstr)) {
d8f6592e 120 SV * const sv = SvRV(tmpstr);
5c35adbb 121 if (SvTYPE(sv) == SVt_REGEXP)
d2f13c59 122 re = (REGEXP*) sv;
c277df42 123 }
5c35adbb
NC
124 if (re) {
125 re = reg_temp_copy(re);
aaa362c4 126 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 127 PM_SETRE(pm, re);
c277df42
IZ
128 }
129 else {
e62f0680 130 STRLEN len;
3ab4a224 131 const char *t = SvOK(tmpstr) ? SvPV_const(tmpstr, len) : "";
c737faaf 132 re = PM_GETRE(pm);
14a49a24 133 assert (re != (REGEXP*) &PL_sv_undef);
c277df42 134
20408e3c 135 /* Check against the last compiled regexp. */
a11c8683 136 if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
220fc49f 137 memNE(RX_PRECOMP(re), t, len))
85aff577 138 {
07bc277f 139 const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
c737faaf 140 U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME;
d8f6592e
AL
141 if (re) {
142 ReREFCNT_dec(re);
14a49a24
NC
143#ifdef USE_ITHREADS
144 PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
145#else
4608196e 146 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
14a49a24 147#endif
1e2e3d02
YO
148 } else if (PL_curcop->cop_hints_hash) {
149 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
150 "regcomp", 7, 0, 0);
151 if (ptr && SvIOK(ptr) && SvIV(ptr))
152 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 153 }
664e119d 154
533c011a 155 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 156 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 157
b9ad30b4
NC
158 if (DO_UTF8(tmpstr)) {
159 assert (SvUTF8(tmpstr));
160 } else if (SvUTF8(tmpstr)) {
161 /* Not doing UTF-8, despite what the SV says. Is this only if
162 we're trapped in use 'bytes'? */
163 /* Make a copy of the octet sequence, but without the flag on,
164 as the compiler now honours the SvUTF8 flag on tmpstr. */
165 STRLEN len;
166 const char *const p = SvPV(tmpstr, len);
167 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
168 }
c737faaf 169
3ab4a224
AB
170 if (eng)
171 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
172 else
173 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 174
f86aaa29 175 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 176 inside tie/overload accessors. */
c277df42 177 }
4633a7c4 178 }
c737faaf
YO
179
180 re = PM_GETRE(pm);
a0d0e21e 181
72311751 182#ifndef INCOMPLETE_TAINTS
3280af22
NIS
183 if (PL_tainting) {
184 if (PL_tainted)
07bc277f 185 RX_EXTFLAGS(re) |= RXf_TAINTED;
72311751 186 else
07bc277f 187 RX_EXTFLAGS(re) &= ~RXf_TAINTED;
72311751
GS
188 }
189#endif
190
220fc49f 191 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 192 pm = PL_curpm;
a0d0e21e 193
c737faaf
YO
194
195#if !defined(USE_ITHREADS)
196 /* can't change the optree at runtime either */
197 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 198 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 199 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 200 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 201 }
c737faaf 202#endif
a0d0e21e
LW
203 RETURN;
204}
205
206PP(pp_substcont)
207{
97aff369 208 dVAR;
39644a26 209 dSP;
c09156bb 210 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
211 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
212 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
213 register char *s = cx->sb_s;
214 register char *m = cx->sb_m;
215 char *orig = cx->sb_orig;
901017d6 216 register REGEXP * const rx = cx->sb_rx;
c445ea15 217 SV *nsv = NULL;
988e6e7e
AE
218 REGEXP *old = PM_GETRE(pm);
219 if(old != rx) {
bfed75c6 220 if(old)
988e6e7e 221 ReREFCNT_dec(old);
d6106309 222 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
223 }
224
d9f97599 225 rxres_restore(&cx->sb_rxres, rx);
01b35787 226 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 227
a0d0e21e 228 if (cx->sb_iters++) {
a3b680e6 229 const I32 saviters = cx->sb_iters;
a0d0e21e 230 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 231 DIE(aTHX_ "Substitution loop");
a0d0e21e 232
48c036b1
GS
233 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
234 cx->sb_rxtainted |= 2;
a0d0e21e 235 sv_catsv(dstr, POPs);
2c296965
YO
236 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
237 s -= RX_GOFS(rx);
a0d0e21e
LW
238
239 /* Are we done */
2c296965
YO
240 if (CxONCE(cx) || s < orig ||
241 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
242 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
243 ((cx->sb_rflags & REXEC_COPY_STR)
244 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
245 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 246 {
823a54a3 247 SV * const targ = cx->sb_targ;
748a9306 248
078c425b
JH
249 assert(cx->sb_strend >= s);
250 if(cx->sb_strend > s) {
251 if (DO_UTF8(dstr) && !SvUTF8(targ))
252 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
253 else
254 sv_catpvn(dstr, s, cx->sb_strend - s);
255 }
48c036b1 256 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 257
f8c7b90f 258#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
259 if (SvIsCOW(targ)) {
260 sv_force_normal_flags(targ, SV_COW_DROP_PV);
261 } else
262#endif
263 {
8bd4d4c5 264 SvPV_free(targ);
ed252734 265 }
f880fe2f 266 SvPV_set(targ, SvPVX(dstr));
748a9306
LW
267 SvCUR_set(targ, SvCUR(dstr));
268 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH
269 if (DO_UTF8(dstr))
270 SvUTF8_on(targ);
6136c704 271 SvPV_set(dstr, NULL);
48c036b1
GS
272
273 TAINT_IF(cx->sb_rxtainted & 1);
6e449a3a 274 mPUSHi(saviters - 1);
48c036b1 275
ffc61ed2 276 (void)SvPOK_only_UTF8(targ);
48c036b1 277 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 278 SvSETMAGIC(targ);
9212bbba 279 SvTAINT(targ);
5cd24f17 280
4633a7c4 281 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
282 POPSUBST(cx);
283 RETURNOP(pm->op_next);
284 }
8e5e9ebe 285 cx->sb_iters = saviters;
a0d0e21e 286 }
07bc277f 287 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
288 m = s;
289 s = orig;
07bc277f 290 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
291 s = orig + (m - s);
292 cx->sb_strend = s + (cx->sb_strend - m);
293 }
07bc277f 294 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 295 if (m > s) {
bfed75c6 296 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
297 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
298 else
299 sv_catpvn(dstr, s, m-s);
300 }
07bc277f 301 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 302 { /* Update the pos() information. */
44f8325f 303 SV * const sv = cx->sb_targ;
084916e3 304 MAGIC *mg;
7a7f3e45 305 SvUPGRADE(sv, SVt_PVMG);
14befaf4 306 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 307#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 308 if (SvIsCOW(sv))
d83f0a82
NC
309 sv_force_normal_flags(sv, 0);
310#endif
311 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
312 NULL, 0);
084916e3 313 }
ce474962 314 mg->mg_len = m - orig;
084916e3 315 }
988e6e7e 316 if (old != rx)
d6106309 317 (void)ReREFCNT_inc(rx);
d9f97599
GS
318 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
319 rxres_save(&cx->sb_rxres, rx);
29f2e912 320 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
321}
322
c90c0ff4 323void
864dbfa3 324Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
325{
326 UV *p = (UV*)*rsp;
327 U32 i;
7918f24d
NC
328
329 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 330 PERL_UNUSED_CONTEXT;
c90c0ff4 331
07bc277f 332 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 333#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 334 i = 7 + RX_NPARENS(rx) * 2;
ed252734 335#else
07bc277f 336 i = 6 + RX_NPARENS(rx) * 2;
ed252734 337#endif
c90c0ff4 338 if (!p)
a02a5408 339 Newx(p, i, UV);
c90c0ff4
PP
340 else
341 Renew(p, i, UV);
342 *rsp = (void*)p;
343 }
344
07bc277f 345 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 346 RX_MATCH_COPIED_off(rx);
c90c0ff4 347
f8c7b90f 348#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
349 *p++ = PTR2UV(RX_SAVED_COPY(rx));
350 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
351#endif
352
07bc277f 353 *p++ = RX_NPARENS(rx);
c90c0ff4 354
07bc277f
NC
355 *p++ = PTR2UV(RX_SUBBEG(rx));
356 *p++ = (UV)RX_SUBLEN(rx);
357 for (i = 0; i <= RX_NPARENS(rx); ++i) {
358 *p++ = (UV)RX_OFFS(rx)[i].start;
359 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
360 }
361}
362
9c105995
NC
363static void
364S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
365{
366 UV *p = (UV*)*rsp;
367 U32 i;
7918f24d
NC
368
369 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 370 PERL_UNUSED_CONTEXT;
c90c0ff4 371
ed252734 372 RX_MATCH_COPY_FREE(rx);
cf93c79d 373 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
374 *p++ = 0;
375
f8c7b90f 376#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
377 if (RX_SAVED_COPY(rx))
378 SvREFCNT_dec (RX_SAVED_COPY(rx));
379 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
380 *p++ = 0;
381#endif
382
07bc277f 383 RX_NPARENS(rx) = *p++;
c90c0ff4 384
07bc277f
NC
385 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
386 RX_SUBLEN(rx) = (I32)(*p++);
387 for (i = 0; i <= RX_NPARENS(rx); ++i) {
388 RX_OFFS(rx)[i].start = (I32)(*p++);
389 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
390 }
391}
392
9c105995
NC
393static void
394S_rxres_free(pTHX_ void **rsp)
c90c0ff4 395{
44f8325f 396 UV * const p = (UV*)*rsp;
7918f24d
NC
397
398 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 399 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
400
401 if (p) {
94010e71
NC
402#ifdef PERL_POISON
403 void *tmp = INT2PTR(char*,*p);
404 Safefree(tmp);
405 if (*p)
7e337ee0 406 PoisonFree(*p, 1, sizeof(*p));
94010e71 407#else
56431972 408 Safefree(INT2PTR(char*,*p));
94010e71 409#endif
f8c7b90f 410#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
411 if (p[1]) {
412 SvREFCNT_dec (INT2PTR(SV*,p[1]));
413 }
414#endif
c90c0ff4 415 Safefree(p);
4608196e 416 *rsp = NULL;
c90c0ff4
PP
417 }
418}
419
a0d0e21e
LW
420PP(pp_formline)
421{
97aff369 422 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 423 register SV * const tmpForm = *++MARK;
dea28490 424 register U32 *fpc;
a0d0e21e 425 register char *t;
245d4a47 426 const char *f;
a0d0e21e 427 register I32 arg;
c445ea15
AL
428 register SV *sv = NULL;
429 const char *item = NULL;
9c5ffd7c
JH
430 I32 itemsize = 0;
431 I32 fieldsize = 0;
a0d0e21e 432 I32 lines = 0;
c445ea15
AL
433 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
434 const char *chophere = NULL;
435 char *linemark = NULL;
65202027 436 NV value;
9c5ffd7c 437 bool gotsome = FALSE;
a0d0e21e 438 STRLEN len;
823a54a3 439 const STRLEN fudge = SvPOK(tmpForm)
24c89738 440 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
441 bool item_is_utf8 = FALSE;
442 bool targ_is_utf8 = FALSE;
c445ea15 443 SV * nsv = NULL;
cbbf8932 444 OP * parseres = NULL;
bfed75c6 445 const char *fmt;
a0d0e21e 446
76e3520e 447 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
448 if (SvREADONLY(tmpForm)) {
449 SvREADONLY_off(tmpForm);
a1b95068 450 parseres = doparseform(tmpForm);
445b3f51
GS
451 SvREADONLY_on(tmpForm);
452 }
453 else
a1b95068
LW
454 parseres = doparseform(tmpForm);
455 if (parseres)
456 return parseres;
a0d0e21e 457 }
3280af22 458 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
459 if (DO_UTF8(PL_formtarget))
460 targ_is_utf8 = TRUE;
a0ed51b3 461 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 462 t += len;
245d4a47 463 f = SvPV_const(tmpForm, len);
a0d0e21e 464 /* need to jump to the next word */
245d4a47 465 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
466
467 for (;;) {
468 DEBUG_f( {
bfed75c6 469 const char *name = "???";
a0d0e21e
LW
470 arg = -1;
471 switch (*fpc) {
472 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
473 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
474 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
475 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
476 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
477
478 case FF_CHECKNL: name = "CHECKNL"; break;
479 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
480 case FF_SPACE: name = "SPACE"; break;
481 case FF_HALFSPACE: name = "HALFSPACE"; break;
482 case FF_ITEM: name = "ITEM"; break;
483 case FF_CHOP: name = "CHOP"; break;
484 case FF_LINEGLOB: name = "LINEGLOB"; break;
485 case FF_NEWLINE: name = "NEWLINE"; break;
486 case FF_MORE: name = "MORE"; break;
487 case FF_LINEMARK: name = "LINEMARK"; break;
488 case FF_END: name = "END"; break;
bfed75c6 489 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 490 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
491 }
492 if (arg >= 0)
bf49b057 493 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 494 else
bf49b057 495 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 496 } );
a0d0e21e
LW
497 switch (*fpc++) {
498 case FF_LINEMARK:
499 linemark = t;
a0d0e21e
LW
500 lines++;
501 gotsome = FALSE;
502 break;
503
504 case FF_LITERAL:
505 arg = *fpc++;
1bd51a4c 506 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 507 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
508 *t = '\0';
509 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
510 t = SvEND(PL_formtarget);
f3f2f1a3 511 f += arg;
1bd51a4c
IH
512 break;
513 }
514 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 515 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c 516 *t = '\0';
7bf79863 517 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC, fudge + 1);
1bd51a4c
IH
518 t = SvEND(PL_formtarget);
519 targ_is_utf8 = TRUE;
520 }
a0d0e21e
LW
521 while (arg--)
522 *t++ = *f++;
523 break;
524
525 case FF_SKIP:
526 f += *fpc++;
527 break;
528
529 case FF_FETCH:
530 arg = *fpc++;
531 f += arg;
532 fieldsize = arg;
533
534 if (MARK < SP)
535 sv = *++MARK;
536 else {
3280af22 537 sv = &PL_sv_no;
599cee73 538 if (ckWARN(WARN_SYNTAX))
9014280d 539 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
540 }
541 break;
542
543 case FF_CHECKNL:
5a34cab7
NC
544 {
545 const char *send;
546 const char *s = item = SvPV_const(sv, len);
547 itemsize = len;
548 if (DO_UTF8(sv)) {
549 itemsize = sv_len_utf8(sv);
550 if (itemsize != (I32)len) {
551 I32 itembytes;
552 if (itemsize > fieldsize) {
553 itemsize = fieldsize;
554 itembytes = itemsize;
555 sv_pos_u2b(sv, &itembytes, 0);
556 }
557 else
558 itembytes = len;
559 send = chophere = s + itembytes;
560 while (s < send) {
561 if (*s & ~31)
562 gotsome = TRUE;
563 else if (*s == '\n')
564 break;
565 s++;
566 }
567 item_is_utf8 = TRUE;
568 itemsize = s - item;
569 sv_pos_b2u(sv, &itemsize);
570 break;
a0ed51b3 571 }
a0ed51b3 572 }
5a34cab7
NC
573 item_is_utf8 = FALSE;
574 if (itemsize > fieldsize)
575 itemsize = fieldsize;
576 send = chophere = s + itemsize;
577 while (s < send) {
578 if (*s & ~31)
579 gotsome = TRUE;
580 else if (*s == '\n')
581 break;
582 s++;
583 }
584 itemsize = s - item;
585 break;
a0ed51b3 586 }
a0d0e21e
LW
587
588 case FF_CHECKCHOP:
5a34cab7
NC
589 {
590 const char *s = item = SvPV_const(sv, len);
591 itemsize = len;
592 if (DO_UTF8(sv)) {
593 itemsize = sv_len_utf8(sv);
594 if (itemsize != (I32)len) {
595 I32 itembytes;
596 if (itemsize <= fieldsize) {
597 const char *send = chophere = s + itemsize;
598 while (s < send) {
599 if (*s == '\r') {
600 itemsize = s - item;
a0ed51b3 601 chophere = s;
a0ed51b3 602 break;
5a34cab7
NC
603 }
604 if (*s++ & ~31)
a0ed51b3 605 gotsome = TRUE;
a0ed51b3 606 }
a0ed51b3 607 }
5a34cab7
NC
608 else {
609 const char *send;
610 itemsize = fieldsize;
611 itembytes = itemsize;
612 sv_pos_u2b(sv, &itembytes, 0);
613 send = chophere = s + itembytes;
614 while (s < send || (s == send && isSPACE(*s))) {
615 if (isSPACE(*s)) {
616 if (chopspace)
617 chophere = s;
618 if (*s == '\r')
619 break;
620 }
621 else {
622 if (*s & ~31)
623 gotsome = TRUE;
624 if (strchr(PL_chopset, *s))
625 chophere = s + 1;
626 }
627 s++;
628 }
629 itemsize = chophere - item;
630 sv_pos_b2u(sv, &itemsize);
631 }
632 item_is_utf8 = TRUE;
a0d0e21e
LW
633 break;
634 }
a0d0e21e 635 }
5a34cab7
NC
636 item_is_utf8 = FALSE;
637 if (itemsize <= fieldsize) {
638 const char *const send = chophere = s + itemsize;
639 while (s < send) {
640 if (*s == '\r') {
641 itemsize = s - item;
a0d0e21e 642 chophere = s;
a0d0e21e 643 break;
5a34cab7
NC
644 }
645 if (*s++ & ~31)
a0d0e21e 646 gotsome = TRUE;
a0d0e21e 647 }
a0d0e21e 648 }
5a34cab7
NC
649 else {
650 const char *send;
651 itemsize = fieldsize;
652 send = chophere = s + itemsize;
653 while (s < send || (s == send && isSPACE(*s))) {
654 if (isSPACE(*s)) {
655 if (chopspace)
656 chophere = s;
657 if (*s == '\r')
658 break;
659 }
660 else {
661 if (*s & ~31)
662 gotsome = TRUE;
663 if (strchr(PL_chopset, *s))
664 chophere = s + 1;
665 }
666 s++;
667 }
668 itemsize = chophere - item;
669 }
670 break;
a0d0e21e 671 }
a0d0e21e
LW
672
673 case FF_SPACE:
674 arg = fieldsize - itemsize;
675 if (arg) {
676 fieldsize -= arg;
677 while (arg-- > 0)
678 *t++ = ' ';
679 }
680 break;
681
682 case FF_HALFSPACE:
683 arg = fieldsize - itemsize;
684 if (arg) {
685 arg /= 2;
686 fieldsize -= arg;
687 while (arg-- > 0)
688 *t++ = ' ';
689 }
690 break;
691
692 case FF_ITEM:
5a34cab7
NC
693 {
694 const char *s = item;
695 arg = itemsize;
696 if (item_is_utf8) {
697 if (!targ_is_utf8) {
698 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
699 *t = '\0';
7bf79863
KW
700 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC,
701 fudge + 1);
5a34cab7
NC
702 t = SvEND(PL_formtarget);
703 targ_is_utf8 = TRUE;
a0ed51b3 704 }
5a34cab7
NC
705 while (arg--) {
706 if (UTF8_IS_CONTINUED(*s)) {
707 STRLEN skip = UTF8SKIP(s);
708 switch (skip) {
709 default:
710 Move(s,t,skip,char);
711 s += skip;
712 t += skip;
713 break;
714 case 7: *t++ = *s++;
715 case 6: *t++ = *s++;
716 case 5: *t++ = *s++;
717 case 4: *t++ = *s++;
718 case 3: *t++ = *s++;
719 case 2: *t++ = *s++;
720 case 1: *t++ = *s++;
721 }
722 }
723 else {
724 if ( !((*t++ = *s++) & ~31) )
725 t[-1] = ' ';
726 }
a0ed51b3 727 }
5a34cab7 728 break;
a0ed51b3 729 }
5a34cab7
NC
730 if (targ_is_utf8 && !item_is_utf8) {
731 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
732 *t = '\0';
733 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
734 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 735#ifdef EBCDIC
901017d6 736 const int ch = *t;
5a34cab7 737 if (iscntrl(ch))
78da4d13 738#else
5a34cab7 739 if (!(*t & ~31))
78da4d13 740#endif
5a34cab7
NC
741 *t = ' ';
742 }
743 break;
78da4d13 744 }
5a34cab7 745 while (arg--) {
9d116dd7 746#ifdef EBCDIC
901017d6 747 const int ch = *t++ = *s++;
5a34cab7 748 if (iscntrl(ch))
a0d0e21e 749#else
5a34cab7 750 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 751#endif
5a34cab7
NC
752 t[-1] = ' ';
753 }
754 break;
a0d0e21e 755 }
a0d0e21e
LW
756
757 case FF_CHOP:
5a34cab7
NC
758 {
759 const char *s = chophere;
760 if (chopspace) {
af68e756 761 while (isSPACE(*s))
5a34cab7
NC
762 s++;
763 }
764 sv_chop(sv,s);
765 SvSETMAGIC(sv);
766 break;
a0d0e21e 767 }
a0d0e21e 768
a1b95068
LW
769 case FF_LINESNGL:
770 chopspace = 0;
a0d0e21e 771 case FF_LINEGLOB:
5a34cab7 772 {
e32383e2 773 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 774 const char *s = item = SvPV_const(sv, len);
f3f2f1a3 775 item_is_utf8 = DO_UTF8(sv);
5a34cab7 776 itemsize = len;
5a34cab7 777 if (itemsize) {
e8e72d41 778 STRLEN to_copy = itemsize;
5a34cab7 779 const char *const send = s + len;
35c6393c 780 const U8 *source = (const U8 *) s;
e8e72d41
NC
781 U8 *tmp = NULL;
782
5a34cab7
NC
783 gotsome = TRUE;
784 chophere = s + itemsize;
785 while (s < send) {
786 if (*s++ == '\n') {
787 if (oneline) {
e8e72d41 788 to_copy = s - SvPVX_const(sv) - 1;
5a34cab7
NC
789 chophere = s;
790 break;
791 } else {
792 if (s == send) {
793 itemsize--;
e8e72d41 794 to_copy--;
5a34cab7
NC
795 } else
796 lines++;
797 }
1bd51a4c 798 }
a0d0e21e 799 }
e8e72d41 800 if (targ_is_utf8 && !item_is_utf8) {
35c6393c 801 source = tmp = bytes_to_utf8(source, &to_copy);
e8e72d41
NC
802 SvCUR_set(PL_formtarget,
803 t - SvPVX_const(PL_formtarget));
804 } else {
805 if (item_is_utf8 && !targ_is_utf8) {
806 /* Upgrade targ to UTF8, and then we reduce it to
807 a problem we have a simple solution for. */
808 SvCUR_set(PL_formtarget,
809 t - SvPVX_const(PL_formtarget));
810 targ_is_utf8 = TRUE;
811 /* Don't need get magic. */
7bf79863 812 sv_utf8_upgrade_nomg(PL_formtarget);
e8e72d41
NC
813 } else {
814 SvCUR_set(PL_formtarget,
815 t - SvPVX_const(PL_formtarget));
816 }
e8e72d41
NC
817
818 /* Easy. They agree. */
819 assert (item_is_utf8 == targ_is_utf8);
820 }
821 SvGROW(PL_formtarget,
822 SvCUR(PL_formtarget) + to_copy + fudge + 1);
5a34cab7 823 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
e8e72d41
NC
824
825 Copy(source, t, to_copy, char);
826 t += to_copy;
827 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
f3f2f1a3 828 if (item_is_utf8) {
e8e72d41
NC
829 if (SvGMAGICAL(sv)) {
830 /* Mustn't call sv_pos_b2u() as it does a second
831 mg_get(). Is this a bug? Do we need a _flags()
832 variant? */
833 itemsize = utf8_length(source, source + itemsize);
834 } else {
835 sv_pos_b2u(sv, &itemsize);
836 }
837 assert(!tmp);
838 } else if (tmp) {
839 Safefree(tmp);
f3f2f1a3 840 }
a0d0e21e 841 }
5a34cab7 842 break;
a0d0e21e 843 }
a0d0e21e 844
a1b95068
LW
845 case FF_0DECIMAL:
846 arg = *fpc++;
847#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
848 fmt = (const char *)
849 ((arg & 256) ?
850 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 851#else
10edeb5d
JH
852 fmt = (const char *)
853 ((arg & 256) ?
854 "%#0*.*f" : "%0*.*f");
a1b95068
LW
855#endif
856 goto ff_dec;
a0d0e21e 857 case FF_DECIMAL:
a0d0e21e 858 arg = *fpc++;
65202027 859#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
860 fmt = (const char *)
861 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 862#else
10edeb5d
JH
863 fmt = (const char *)
864 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 865#endif
a1b95068 866 ff_dec:
784707d5
JP
867 /* If the field is marked with ^ and the value is undefined,
868 blank it out. */
784707d5
JP
869 if ((arg & 512) && !SvOK(sv)) {
870 arg = fieldsize;
871 while (arg--)
872 *t++ = ' ';
873 break;
874 }
875 gotsome = TRUE;
876 value = SvNV(sv);
a1b95068 877 /* overflow evidence */
bfed75c6 878 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
879 arg = fieldsize;
880 while (arg--)
881 *t++ = '#';
882 break;
883 }
784707d5
JP
884 /* Formats aren't yet marked for locales, so assume "yes". */
885 {
886 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 887 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
888 RESTORE_NUMERIC_STANDARD();
889 }
890 t += fieldsize;
891 break;
a1b95068 892
a0d0e21e
LW
893 case FF_NEWLINE:
894 f++;
895 while (t-- > linemark && *t == ' ') ;
896 t++;
897 *t++ = '\n';
898 break;
899
900 case FF_BLANK:
901 arg = *fpc++;
902 if (gotsome) {
903 if (arg) { /* repeat until fields exhausted? */
904 *t = '\0';
b15aece3 905 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 906 lines += FmLINES(PL_formtarget);
a0d0e21e
LW
907 if (lines == 200) {
908 arg = t - linemark;
909 if (strnEQ(linemark, linemark - arg, arg))
cea2e8a9 910 DIE(aTHX_ "Runaway format");
a0d0e21e 911 }
1bd51a4c
IH
912 if (targ_is_utf8)
913 SvUTF8_on(PL_formtarget);
3280af22 914 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
915 SP = ORIGMARK;
916 RETURNOP(cLISTOP->op_first);
917 }
918 }
919 else {
920 t = linemark;
921 lines--;
922 }
923 break;
924
925 case FF_MORE:
5a34cab7
NC
926 {
927 const char *s = chophere;
928 const char *send = item + len;
929 if (chopspace) {
af68e756 930 while (isSPACE(*s) && (s < send))
5a34cab7 931 s++;
a0d0e21e 932 }
5a34cab7
NC
933 if (s < send) {
934 char *s1;
935 arg = fieldsize - itemsize;
936 if (arg) {
937 fieldsize -= arg;
938 while (arg-- > 0)
939 *t++ = ' ';
940 }
941 s1 = t - 3;
942 if (strnEQ(s1," ",3)) {
943 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
944 s1--;
945 }
946 *s1++ = '.';
947 *s1++ = '.';
948 *s1++ = '.';
a0d0e21e 949 }
5a34cab7 950 break;
a0d0e21e 951 }
a0d0e21e
LW
952 case FF_END:
953 *t = '\0';
b15aece3 954 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
955 if (targ_is_utf8)
956 SvUTF8_on(PL_formtarget);
3280af22 957 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
958 SP = ORIGMARK;
959 RETPUSHYES;
960 }
961 }
962}
963
964PP(pp_grepstart)
965{
27da23d5 966 dVAR; dSP;
a0d0e21e
LW
967 SV *src;
968
3280af22 969 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 970 (void)POPMARK;
54310121 971 if (GIMME_V == G_SCALAR)
6e449a3a 972 mXPUSHi(0);
533c011a 973 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 974 }
3280af22 975 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
976 pp_pushmark(); /* push dst */
977 pp_pushmark(); /* push src */
a0d0e21e
LW
978 ENTER; /* enter outer scope */
979
980 SAVETMPS;
59f00321
RGS
981 if (PL_op->op_private & OPpGREP_LEX)
982 SAVESPTR(PAD_SVl(PL_op->op_targ));
983 else
984 SAVE_DEFSV;
a0d0e21e 985 ENTER; /* enter inner scope */
7766f137 986 SAVEVPTR(PL_curpm);
a0d0e21e 987
3280af22 988 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 989 SvTEMP_off(src);
59f00321
RGS
990 if (PL_op->op_private & OPpGREP_LEX)
991 PAD_SVl(PL_op->op_targ) = src;
992 else
414bf5ae 993 DEFSV_set(src);
a0d0e21e
LW
994
995 PUTBACK;
533c011a 996 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 997 pp_pushmark(); /* push top */
533c011a 998 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
999}
1000
a0d0e21e
LW
1001PP(pp_mapwhile)
1002{
27da23d5 1003 dVAR; dSP;
f54cb97a 1004 const I32 gimme = GIMME_V;
544f3153 1005 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
1006 I32 count;
1007 I32 shift;
1008 SV** src;
ac27b0f5 1009 SV** dst;
a0d0e21e 1010
544f3153 1011 /* first, move source pointer to the next item in the source list */
3280af22 1012 ++PL_markstack_ptr[-1];
544f3153
GS
1013
1014 /* if there are new items, push them into the destination list */
4c90a460 1015 if (items && gimme != G_VOID) {
544f3153
GS
1016 /* might need to make room back there first */
1017 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1018 /* XXX this implementation is very pessimal because the stack
1019 * is repeatedly extended for every set of items. Is possible
1020 * to do this without any stack extension or copying at all
1021 * by maintaining a separate list over which the map iterates
18ef8bea 1022 * (like foreach does). --gsar */
544f3153
GS
1023
1024 /* everything in the stack after the destination list moves
1025 * towards the end the stack by the amount of room needed */
1026 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1027
1028 /* items to shift up (accounting for the moved source pointer) */
1029 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
1030
1031 /* This optimization is by Ben Tilly and it does
1032 * things differently from what Sarathy (gsar)
1033 * is describing. The downside of this optimization is
1034 * that leaves "holes" (uninitialized and hopefully unused areas)
1035 * to the Perl stack, but on the other hand this
1036 * shouldn't be a problem. If Sarathy's idea gets
1037 * implemented, this optimization should become
1038 * irrelevant. --jhi */
1039 if (shift < count)
1040 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1041
924508f0
GS
1042 EXTEND(SP,shift);
1043 src = SP;
1044 dst = (SP += shift);
3280af22
NIS
1045 PL_markstack_ptr[-1] += shift;
1046 *PL_markstack_ptr += shift;
544f3153 1047 while (count--)
a0d0e21e
LW
1048 *dst-- = *src--;
1049 }
544f3153 1050 /* copy the new items down to the destination list */
ac27b0f5 1051 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
1052 if (gimme == G_ARRAY) {
1053 while (items-- > 0)
1054 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1055 }
bfed75c6 1056 else {
22023b26
TP
1057 /* scalar context: we don't care about which values map returns
1058 * (we use undef here). And so we certainly don't want to do mortal
1059 * copies of meaningless values. */
1060 while (items-- > 0) {
b988aa42 1061 (void)POPs;
22023b26
TP
1062 *dst-- = &PL_sv_undef;
1063 }
1064 }
a0d0e21e
LW
1065 }
1066 LEAVE; /* exit inner scope */
1067
1068 /* All done yet? */
3280af22 1069 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1070
1071 (void)POPMARK; /* pop top */
1072 LEAVE; /* exit outer scope */
1073 (void)POPMARK; /* pop src */
3280af22 1074 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1075 (void)POPMARK; /* pop dst */
3280af22 1076 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1077 if (gimme == G_SCALAR) {
7cc47870
RGS
1078 if (PL_op->op_private & OPpGREP_LEX) {
1079 SV* sv = sv_newmortal();
1080 sv_setiv(sv, items);
1081 PUSHs(sv);
1082 }
1083 else {
1084 dTARGET;
1085 XPUSHi(items);
1086 }
a0d0e21e 1087 }
54310121
PP
1088 else if (gimme == G_ARRAY)
1089 SP += items;
a0d0e21e
LW
1090 RETURN;
1091 }
1092 else {
1093 SV *src;
1094
1095 ENTER; /* enter inner scope */
7766f137 1096 SAVEVPTR(PL_curpm);
a0d0e21e 1097
544f3153 1098 /* set $_ to the new source item */
3280af22 1099 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1100 SvTEMP_off(src);
59f00321
RGS
1101 if (PL_op->op_private & OPpGREP_LEX)
1102 PAD_SVl(PL_op->op_targ) = src;
1103 else
414bf5ae 1104 DEFSV_set(src);
a0d0e21e
LW
1105
1106 RETURNOP(cLOGOP->op_other);
1107 }
1108}
1109
a0d0e21e
LW
1110/* Range stuff. */
1111
1112PP(pp_range)
1113{
97aff369 1114 dVAR;
a0d0e21e 1115 if (GIMME == G_ARRAY)
1a67a97c 1116 return NORMAL;
538573f7 1117 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1118 return cLOGOP->op_other;
538573f7 1119 else
1a67a97c 1120 return NORMAL;
a0d0e21e
LW
1121}
1122
1123PP(pp_flip)
1124{
97aff369 1125 dVAR;
39644a26 1126 dSP;
a0d0e21e
LW
1127
1128 if (GIMME == G_ARRAY) {
1a67a97c 1129 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1130 }
1131 else {
1132 dTOPss;
44f8325f 1133 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1134 int flip = 0;
790090df 1135
bfed75c6 1136 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1137 if (GvIO(PL_last_in_gv)) {
1138 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1139 }
1140 else {
fafc274c 1141 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1142 if (gv && GvSV(gv))
1143 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1144 }
bfed75c6
AL
1145 } else {
1146 flip = SvTRUE(sv);
1147 }
1148 if (flip) {
a0d0e21e 1149 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1150 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1151 sv_setiv(targ, 1);
3e3baf6d 1152 SETs(targ);
a0d0e21e
LW
1153 RETURN;
1154 }
1155 else {
1156 sv_setiv(targ, 0);
924508f0 1157 SP--;
1a67a97c 1158 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1159 }
1160 }
76f68e9b 1161 sv_setpvs(TARG, "");
a0d0e21e
LW
1162 SETs(targ);
1163 RETURN;
1164 }
1165}
1166
8e9bbdb9
RGS
1167/* This code tries to decide if "$left .. $right" should use the
1168 magical string increment, or if the range is numeric (we make
1169 an exception for .."0" [#18165]). AMS 20021031. */
1170
1171#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1172 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1173 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1174 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1175 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1176 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1177
a0d0e21e
LW
1178PP(pp_flop)
1179{
97aff369 1180 dVAR; dSP;
a0d0e21e
LW
1181
1182 if (GIMME == G_ARRAY) {
1183 dPOPPOPssrl;
86cb7173 1184
5b295bef
RD
1185 SvGETMAGIC(left);
1186 SvGETMAGIC(right);
a0d0e21e 1187
8e9bbdb9 1188 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1189 register IV i, j;
1190 IV max;
4fe3f0fa
MHM
1191 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1192 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1193 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1194 i = SvIV(left);
1195 max = SvIV(right);
bbce6d69 1196 if (max >= i) {
c1ab3db2
AK
1197 j = max - i + 1;
1198 EXTEND_MORTAL(j);
1199 EXTEND(SP, j);
bbce6d69 1200 }
c1ab3db2
AK
1201 else
1202 j = 0;
1203 while (j--) {
901017d6 1204 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1205 PUSHs(sv);
1206 }
1207 }
1208 else {
44f8325f 1209 SV * const final = sv_mortalcopy(right);
13c5b33c 1210 STRLEN len;
823a54a3 1211 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1212
901017d6 1213 SV *sv = sv_mortalcopy(left);
13c5b33c 1214 SvPV_force_nolen(sv);
89ea2908 1215 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1216 XPUSHs(sv);
b15aece3 1217 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1218 break;
a0d0e21e
LW
1219 sv = sv_2mortal(newSVsv(sv));
1220 sv_inc(sv);
1221 }
a0d0e21e
LW
1222 }
1223 }
1224 else {
1225 dTOPss;
901017d6 1226 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1227 int flop = 0;
a0d0e21e 1228 sv_inc(targ);
4e3399f9
YST
1229
1230 if (PL_op->op_private & OPpFLIP_LINENUM) {
1231 if (GvIO(PL_last_in_gv)) {
1232 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1233 }
1234 else {
fafc274c 1235 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1236 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1237 }
1238 }
1239 else {
1240 flop = SvTRUE(sv);
1241 }
1242
1243 if (flop) {
a0d0e21e 1244 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1245 sv_catpvs(targ, "E0");
a0d0e21e
LW
1246 }
1247 SETs(targ);
1248 }
1249
1250 RETURN;
1251}
1252
1253/* Control. */
1254
27da23d5 1255static const char * const context_name[] = {
515afda2 1256 "pseudo-block",
f31522f3 1257 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1258 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1259 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1260 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1261 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1262 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1263 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1264 "subroutine",
76753e7f 1265 "format",
515afda2 1266 "eval",
515afda2 1267 "substitution",
515afda2
NC
1268};
1269
76e3520e 1270STATIC I32
06b5626a 1271S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1272{
97aff369 1273 dVAR;
a0d0e21e 1274 register I32 i;
a0d0e21e 1275
7918f24d
NC
1276 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1277
a0d0e21e 1278 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1279 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1280 switch (CxTYPE(cx)) {
a0d0e21e 1281 case CXt_SUBST:
a0d0e21e 1282 case CXt_SUB:
7766f137 1283 case CXt_FORMAT:
a0d0e21e 1284 case CXt_EVAL:
0a753a76 1285 case CXt_NULL:
e476b1b5 1286 if (ckWARN(WARN_EXITING))
515afda2
NC
1287 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1288 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1289 if (CxTYPE(cx) == CXt_NULL)
1290 return -1;
1291 break;
c6fdafd0 1292 case CXt_LOOP_LAZYIV:
d01136d6 1293 case CXt_LOOP_LAZYSV:
3b719c58
NC
1294 case CXt_LOOP_FOR:
1295 case CXt_LOOP_PLAIN:
a61a7064 1296 if ( !CxLABEL(cx) || strNE(label, CxLABEL(cx)) ) {
cea2e8a9 1297 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
a61a7064 1298 (long)i, CxLABEL(cx)));
a0d0e21e
LW
1299 continue;
1300 }
cea2e8a9 1301 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1302 return i;
1303 }
1304 }
1305 return i;
1306}
1307
0d863452
RH
1308
1309
e50aee73 1310I32
864dbfa3 1311Perl_dowantarray(pTHX)
e50aee73 1312{
97aff369 1313 dVAR;
f54cb97a 1314 const I32 gimme = block_gimme();
54310121
PP
1315 return (gimme == G_VOID) ? G_SCALAR : gimme;
1316}
1317
1318I32
864dbfa3 1319Perl_block_gimme(pTHX)
54310121 1320{
97aff369 1321 dVAR;
06b5626a 1322 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1323 if (cxix < 0)
46fc3d4c 1324 return G_VOID;
e50aee73 1325
54310121 1326 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1327 case G_VOID:
1328 return G_VOID;
54310121 1329 case G_SCALAR:
e50aee73 1330 return G_SCALAR;
54310121
PP
1331 case G_ARRAY:
1332 return G_ARRAY;
1333 default:
cea2e8a9 1334 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1335 /* NOTREACHED */
1336 return 0;
54310121 1337 }
e50aee73
AD
1338}
1339
78f9721b
SM
1340I32
1341Perl_is_lvalue_sub(pTHX)
1342{
97aff369 1343 dVAR;
06b5626a 1344 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1345 assert(cxix >= 0); /* We should only be called from inside subs */
1346
bafb2adc
NC
1347 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1348 return CxLVAL(cxstack + cxix);
78f9721b
SM
1349 else
1350 return 0;
1351}
1352
76e3520e 1353STATIC I32
901017d6 1354S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1355{
97aff369 1356 dVAR;
a0d0e21e 1357 I32 i;
7918f24d
NC
1358
1359 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1360
a0d0e21e 1361 for (i = startingblock; i >= 0; i--) {
901017d6 1362 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1363 switch (CxTYPE(cx)) {
a0d0e21e
LW
1364 default:
1365 continue;
1366 case CXt_EVAL:
1367 case CXt_SUB:
7766f137 1368 case CXt_FORMAT:
cea2e8a9 1369 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1370 return i;
1371 }
1372 }
1373 return i;
1374}
1375
76e3520e 1376STATIC I32
cea2e8a9 1377S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1378{
97aff369 1379 dVAR;
a0d0e21e 1380 I32 i;
a0d0e21e 1381 for (i = startingblock; i >= 0; i--) {
06b5626a 1382 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1383 switch (CxTYPE(cx)) {
a0d0e21e
LW
1384 default:
1385 continue;
1386 case CXt_EVAL:
cea2e8a9 1387 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1388 return i;
1389 }
1390 }
1391 return i;
1392}
1393
76e3520e 1394STATIC I32
cea2e8a9 1395S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1396{
97aff369 1397 dVAR;
a0d0e21e 1398 I32 i;
a0d0e21e 1399 for (i = startingblock; i >= 0; i--) {
901017d6 1400 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1401 switch (CxTYPE(cx)) {
a0d0e21e 1402 case CXt_SUBST:
a0d0e21e 1403 case CXt_SUB:
7766f137 1404 case CXt_FORMAT:
a0d0e21e 1405 case CXt_EVAL:
0a753a76 1406 case CXt_NULL:
e476b1b5 1407 if (ckWARN(WARN_EXITING))
515afda2
NC
1408 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1409 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1410 if ((CxTYPE(cx)) == CXt_NULL)
1411 return -1;
1412 break;
c6fdafd0 1413 case CXt_LOOP_LAZYIV:
d01136d6 1414 case CXt_LOOP_LAZYSV:
3b719c58
NC
1415 case CXt_LOOP_FOR:
1416 case CXt_LOOP_PLAIN:
cea2e8a9 1417 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1418 return i;
1419 }
1420 }
1421 return i;
1422}
1423
0d863452
RH
1424STATIC I32
1425S_dopoptogiven(pTHX_ I32 startingblock)
1426{
97aff369 1427 dVAR;
0d863452
RH
1428 I32 i;
1429 for (i = startingblock; i >= 0; i--) {
1430 register const PERL_CONTEXT *cx = &cxstack[i];
1431 switch (CxTYPE(cx)) {
1432 default:
1433 continue;
1434 case CXt_GIVEN:
1435 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1436 return i;
3b719c58
NC
1437 case CXt_LOOP_PLAIN:
1438 assert(!CxFOREACHDEF(cx));
1439 break;
c6fdafd0 1440 case CXt_LOOP_LAZYIV:
d01136d6 1441 case CXt_LOOP_LAZYSV:
3b719c58 1442 case CXt_LOOP_FOR:
0d863452
RH
1443 if (CxFOREACHDEF(cx)) {
1444 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1445 return i;
1446 }
1447 }
1448 }
1449 return i;
1450}
1451
1452STATIC I32
1453S_dopoptowhen(pTHX_ I32 startingblock)
1454{
97aff369 1455 dVAR;
0d863452
RH
1456 I32 i;
1457 for (i = startingblock; i >= 0; i--) {
1458 register const PERL_CONTEXT *cx = &cxstack[i];
1459 switch (CxTYPE(cx)) {
1460 default:
1461 continue;
1462 case CXt_WHEN:
1463 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1464 return i;
1465 }
1466 }
1467 return i;
1468}
1469
a0d0e21e 1470void
864dbfa3 1471Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1472{
97aff369 1473 dVAR;
a0d0e21e
LW
1474 I32 optype;
1475
1476 while (cxstack_ix > cxix) {
b0d9ce38 1477 SV *sv;
06b5626a 1478 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1479 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1480 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1481 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1482 switch (CxTYPE(cx)) {
c90c0ff4
PP
1483 case CXt_SUBST:
1484 POPSUBST(cx);
1485 continue; /* not break */
a0d0e21e 1486 case CXt_SUB:
b0d9ce38
GS
1487 POPSUB(cx,sv);
1488 LEAVESUB(sv);
a0d0e21e
LW
1489 break;
1490 case CXt_EVAL:
1491 POPEVAL(cx);
1492 break;
c6fdafd0 1493 case CXt_LOOP_LAZYIV:
d01136d6 1494 case CXt_LOOP_LAZYSV:
3b719c58
NC
1495 case CXt_LOOP_FOR:
1496 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1497 POPLOOP(cx);
1498 break;
0a753a76 1499 case CXt_NULL:
a0d0e21e 1500 break;
7766f137
GS
1501 case CXt_FORMAT:
1502 POPFORMAT(cx);
1503 break;
a0d0e21e 1504 }
c90c0ff4 1505 cxstack_ix--;
a0d0e21e 1506 }
1b6737cc 1507 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1508}
1509
5a844595
GS
1510void
1511Perl_qerror(pTHX_ SV *err)
1512{
97aff369 1513 dVAR;
7918f24d
NC
1514
1515 PERL_ARGS_ASSERT_QERROR;
1516
5a844595
GS
1517 if (PL_in_eval)
1518 sv_catsv(ERRSV, err);
1519 else if (PL_errors)
1520 sv_catsv(PL_errors, err);
1521 else
be2597df 1522 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1523 if (PL_parser)
1524 ++PL_parser->error_count;
5a844595
GS
1525}
1526
a0d0e21e 1527OP *
35a4481c 1528Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1529{
27da23d5 1530 dVAR;
87582a92 1531
3280af22 1532 if (PL_in_eval) {
a0d0e21e 1533 I32 cxix;
a0d0e21e 1534 I32 gimme;
a0d0e21e 1535
4e6ea2c3 1536 if (message) {
faef0170 1537 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1538 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1539 SV * const err = ERRSV;
c445ea15 1540 const char *e = NULL;
98eae8f5 1541 if (!SvPOK(err))
76f68e9b 1542 sv_setpvs(err,"");
98eae8f5 1543 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1544 STRLEN len;
349d4f2f 1545 e = SvPV_const(err, len);
0510663f 1546 e += len - msglen;
98eae8f5 1547 if (*e != *message || strNE(e,message))
c445ea15 1548 e = NULL;
98eae8f5
GS
1549 }
1550 if (!e) {
1551 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1552 sv_catpvn(err, prefix, sizeof(prefix)-1);
1553 sv_catpvn(err, message, msglen);
e476b1b5 1554 if (ckWARN(WARN_MISC)) {
504618e9 1555 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
f1f66076
RGS
1556 Perl_warner(aTHX_ packWARN(WARN_MISC), "%s",
1557 SvPVX_const(err)+start);
4e6ea2c3 1558 }
4633a7c4 1559 }
4633a7c4 1560 }
1aa99e6b 1561 else {
06bf62c7 1562 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1563 }
4633a7c4 1564 }
4e6ea2c3 1565
5a844595
GS
1566 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1567 && PL_curstackinfo->si_prev)
1568 {
bac4b2ad 1569 dounwind(-1);
d3acc0f7 1570 POPSTACK;
bac4b2ad 1571 }
e336de0d 1572
a0d0e21e
LW
1573 if (cxix >= 0) {
1574 I32 optype;
35a4481c 1575 register PERL_CONTEXT *cx;
901017d6 1576 SV **newsp;
a0d0e21e
LW
1577
1578 if (cxix < cxstack_ix)
1579 dounwind(cxix);
1580
3280af22 1581 POPBLOCK(cx,PL_curpm);
6b35e009 1582 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1583 if (!message)
349d4f2f 1584 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1585 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1586 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1587 my_exit(1);
1588 }
1589 POPEVAL(cx);
1590
1591 if (gimme == G_SCALAR)
3280af22
NIS
1592 *++newsp = &PL_sv_undef;
1593 PL_stack_sp = newsp;
a0d0e21e
LW
1594
1595 LEAVE;
748a9306 1596
7fb6a879
GS
1597 /* LEAVE could clobber PL_curcop (see save_re_context())
1598 * XXX it might be better to find a way to avoid messing with
1599 * PL_curcop in save_re_context() instead, but this is a more
1600 * minimal fix --GSAR */
1601 PL_curcop = cx->blk_oldcop;
1602
7a2e2cd6 1603 if (optype == OP_REQUIRE) {
44f8325f 1604 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1605 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1606 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1607 &PL_sv_undef, 0);
5a844595
GS
1608 DIE(aTHX_ "%sCompilation failed in require",
1609 *msg ? msg : "Unknown error\n");
7a2e2cd6 1610 }
f39bc417
DM
1611 assert(CxTYPE(cx) == CXt_EVAL);
1612 return cx->blk_eval.retop;
a0d0e21e
LW
1613 }
1614 }
9cc2fdd3 1615 if (!message)
349d4f2f 1616 message = SvPVx_const(ERRSV, msglen);
87582a92 1617
7ff03255 1618 write_to_stderr(message, msglen);
f86702cc
PP
1619 my_failure_exit();
1620 /* NOTREACHED */
a0d0e21e
LW
1621 return 0;
1622}
1623
1624PP(pp_xor)
1625{
97aff369 1626 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1627 if (SvTRUE(left) != SvTRUE(right))
1628 RETSETYES;
1629 else
1630 RETSETNO;
1631}
1632
a0d0e21e
LW
1633PP(pp_caller)
1634{
97aff369 1635 dVAR;
39644a26 1636 dSP;
a0d0e21e 1637 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1638 register const PERL_CONTEXT *cx;
1639 register const PERL_CONTEXT *ccstack = cxstack;
1640 const PERL_SI *top_si = PL_curstackinfo;
54310121 1641 I32 gimme;
06b5626a 1642 const char *stashname;
a0d0e21e
LW
1643 I32 count = 0;
1644
1645 if (MAXARG)
1646 count = POPi;
27d41816 1647
a0d0e21e 1648 for (;;) {
2c375eb9
GS
1649 /* we may be in a higher stacklevel, so dig down deeper */
1650 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1651 top_si = top_si->si_prev;
1652 ccstack = top_si->si_cxstack;
1653 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1654 }
a0d0e21e 1655 if (cxix < 0) {
27d41816
DM
1656 if (GIMME != G_ARRAY) {
1657 EXTEND(SP, 1);
a0d0e21e 1658 RETPUSHUNDEF;
27d41816 1659 }
a0d0e21e
LW
1660 RETURN;
1661 }
f2a7f298 1662 /* caller() should not report the automatic calls to &DB::sub */
1663 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1664 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1665 count++;
1666 if (!count--)
1667 break;
2c375eb9 1668 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1669 }
2c375eb9
GS
1670
1671 cx = &ccstack[cxix];
7766f137 1672 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1673 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1674 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1675 field below is defined for any cx. */
f2a7f298 1676 /* caller() should not report the automatic calls to &DB::sub */
1677 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1678 cx = &ccstack[dbcxix];
06a5b730
PP
1679 }
1680
ed094faf 1681 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1682 if (GIMME != G_ARRAY) {
27d41816 1683 EXTEND(SP, 1);
ed094faf 1684 if (!stashname)
3280af22 1685 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1686 else {
1687 dTARGET;
ed094faf 1688 sv_setpv(TARG, stashname);
49d8d3a1
MB
1689 PUSHs(TARG);
1690 }
a0d0e21e
LW
1691 RETURN;
1692 }
a0d0e21e 1693
b3ca2e83 1694 EXTEND(SP, 11);
27d41816 1695
ed094faf 1696 if (!stashname)
3280af22 1697 PUSHs(&PL_sv_undef);
49d8d3a1 1698 else
6e449a3a
MHM
1699 mPUSHs(newSVpv(stashname, 0));
1700 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1701 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW
1702 if (!MAXARG)
1703 RETURN;
7766f137 1704 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1705 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1706 /* So is ccstack[dbcxix]. */
07b8c804 1707 if (isGV(cvgv)) {
561b68a9 1708 SV * const sv = newSV(0);
c445ea15 1709 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1710 mPUSHs(sv);
bf38a478 1711 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1712 }
1713 else {
84bafc02 1714 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1715 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1716 }
a0d0e21e
LW
1717 }
1718 else {
84bafc02 1719 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1720 mPUSHi(0);
a0d0e21e 1721 }
54310121
PP
1722 gimme = (I32)cx->blk_gimme;
1723 if (gimme == G_VOID)
3280af22 1724 PUSHs(&PL_sv_undef);
54310121 1725 else
98625aca 1726 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1727 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1728 /* eval STRING */
85a64632 1729 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1730 PUSHs(cx->blk_eval.cur_text);
3280af22 1731 PUSHs(&PL_sv_no);
0f79a09d 1732 }
811a4de9 1733 /* require */
0f79a09d 1734 else if (cx->blk_eval.old_namesv) {
6e449a3a 1735 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1736 PUSHs(&PL_sv_yes);
06a5b730 1737 }
811a4de9
GS
1738 /* eval BLOCK (try blocks have old_namesv == 0) */
1739 else {
1740 PUSHs(&PL_sv_undef);
1741 PUSHs(&PL_sv_undef);
1742 }
4633a7c4 1743 }
a682de96
GS
1744 else {
1745 PUSHs(&PL_sv_undef);
1746 PUSHs(&PL_sv_undef);
1747 }
bafb2adc 1748 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1749 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1750 {
66a1b24b
AL
1751 AV * const ary = cx->blk_sub.argarray;
1752 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1753
3280af22 1754 if (!PL_dbargs) {
af3885a0
NC
1755 PL_dbargs = GvAV(gv_AVadd(gv_fetchpvs("DB::args", GV_ADDMULTI,
1756 SVt_PVAV)));
3ddcf04c 1757 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1758 }
1759
3280af22
NIS
1760 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1761 av_extend(PL_dbargs, AvFILLp(ary) + off);
1762 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1763 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1764 }
f3aa04c2
GS
1765 /* XXX only hints propagated via op_private are currently
1766 * visible (others are not easily accessible, since they
1767 * use the global PL_hints) */
6e449a3a 1768 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1769 {
1770 SV * mask ;
72dc9ed5 1771 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1772
ac27b0f5 1773 if (old_warnings == pWARN_NONE ||
114bafba 1774 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1775 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1776 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1777 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1778 /* Get the bit mask for $warnings::Bits{all}, because
1779 * it could have been extended by warnings::register */
1780 SV **bits_all;
6673a63c 1781 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1782 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1783 mask = newSVsv(*bits_all);
1784 }
1785 else {
1786 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1787 }
1788 }
e476b1b5 1789 else
72dc9ed5 1790 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1791 mPUSHs(mask);
e476b1b5 1792 }
b3ca2e83 1793
c28fe1ec 1794 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1795 sv_2mortal(newRV_noinc(
ad64d0ec
NC
1796 MUTABLE_SV(Perl_refcounted_he_chain_2hv(aTHX_
1797 cx->blk_oldcop->cop_hints_hash))))
b3ca2e83 1798 : &PL_sv_undef);
a0d0e21e
LW
1799 RETURN;
1800}
1801
a0d0e21e
LW
1802PP(pp_reset)
1803{
97aff369 1804 dVAR;
39644a26 1805 dSP;
10edeb5d 1806 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1807 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1808 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1809 RETURN;
1810}
1811
dd2155a4
DM
1812/* like pp_nextstate, but used instead when the debugger is active */
1813
a0d0e21e
LW
1814PP(pp_dbstate)
1815{
27da23d5 1816 dVAR;
533c011a 1817 PL_curcop = (COP*)PL_op;
a0d0e21e 1818 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1819 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1820 FREETMPS;
1821
5df8de69
DM
1822 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1823 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1824 {
39644a26 1825 dSP;
c09156bb 1826 register PERL_CONTEXT *cx;
f54cb97a 1827 const I32 gimme = G_ARRAY;
eb160463 1828 U8 hasargs;
0bd48802
AL
1829 GV * const gv = PL_DBgv;
1830 register CV * const cv = GvCV(gv);
a0d0e21e 1831
a0d0e21e 1832 if (!cv)
cea2e8a9 1833 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1834
aea4f609
DM
1835 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1836 /* don't do recursive DB::DB call */
a0d0e21e 1837 return NORMAL;
748a9306 1838
4633a7c4
LW
1839 ENTER;
1840 SAVETMPS;
1841
3280af22 1842 SAVEI32(PL_debug);
55497cff 1843 SAVESTACK_POS();
3280af22 1844 PL_debug = 0;
748a9306 1845 hasargs = 0;
924508f0 1846 SPAGAIN;
748a9306 1847
aed2304a 1848 if (CvISXSUB(cv)) {
c127bd3a
SF
1849 CvDEPTH(cv)++;
1850 PUSHMARK(SP);
1851 (void)(*CvXSUB(cv))(aTHX_ cv);
1852 CvDEPTH(cv)--;
1853 FREETMPS;
1854 LEAVE;
1855 return NORMAL;
1856 }
1857 else {
1858 PUSHBLOCK(cx, CXt_SUB, SP);
1859 PUSHSUB_DB(cx);
1860 cx->blk_sub.retop = PL_op->op_next;
1861 CvDEPTH(cv)++;
1862 SAVECOMPPAD();
1863 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1864 RETURNOP(CvSTART(cv));
1865 }
a0d0e21e
LW
1866 }
1867 else
1868 return NORMAL;
1869}
1870
a0d0e21e
LW
1871PP(pp_enteriter)
1872{
27da23d5 1873 dVAR; dSP; dMARK;
c09156bb 1874 register PERL_CONTEXT *cx;
f54cb97a 1875 const I32 gimme = GIMME_V;
a0d0e21e 1876 SV **svp;
840fe433 1877 U8 cxtype = CXt_LOOP_FOR;
7766f137 1878#ifdef USE_ITHREADS
e846cb92 1879 PAD *iterdata;
7766f137 1880#endif
a0d0e21e 1881
4633a7c4
LW
1882 ENTER;
1883 SAVETMPS;
1884
533c011a 1885 if (PL_op->op_targ) {
14f338dc
DM
1886 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1887 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1888 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1889 SVs_PADSTALE, SVs_PADSTALE);
1890 }
09edbca0 1891 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
c3564e5c 1892#ifndef USE_ITHREADS
dd2155a4 1893 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
c3564e5c 1894#else
e846cb92 1895 iterdata = NULL;
7766f137 1896#endif
54b9620d
MB
1897 }
1898 else {
159b6efe 1899 GV * const gv = MUTABLE_GV(POPs);
7766f137 1900 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1901 SAVEGENERICSV(*svp);
561b68a9 1902 *svp = newSV(0);
7766f137 1903#ifdef USE_ITHREADS
e846cb92 1904 iterdata = (PAD*)gv;
7766f137 1905#endif
54b9620d 1906 }
4633a7c4 1907
0d863452
RH
1908 if (PL_op->op_private & OPpITER_DEF)
1909 cxtype |= CXp_FOR_DEF;
1910
a0d0e21e
LW
1911 ENTER;
1912
7766f137
GS
1913 PUSHBLOCK(cx, cxtype, SP);
1914#ifdef USE_ITHREADS
e846cb92 1915 PUSHLOOP_FOR(cx, iterdata, MARK, PL_op->op_targ);
7766f137 1916#else
52d1f6fb 1917 PUSHLOOP_FOR(cx, svp, MARK, 0);
7766f137 1918#endif
533c011a 1919 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
1920 SV *maybe_ary = POPs;
1921 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 1922 dPOPss;
d01136d6 1923 SV * const right = maybe_ary;
984a4bea
RD
1924 SvGETMAGIC(sv);
1925 SvGETMAGIC(right);
4fe3f0fa 1926 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 1927 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
1928 cx->cx_type |= CXt_LOOP_LAZYIV;
1929 /* Make sure that no-one re-orders cop.h and breaks our
1930 assumptions */
1931 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040
JH
1932#ifdef NV_PRESERVES_UV
1933 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1934 (SvNV(sv) > (NV)IV_MAX)))
1935 ||
1936 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1937 (SvNV(right) < (NV)IV_MIN))))
1938#else
1939 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1940 ||
1941 ((SvNV(sv) > 0) &&
1942 ((SvUV(sv) > (UV)IV_MAX) ||
1943 (SvNV(sv) > (NV)UV_MAX)))))
1944 ||
1945 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1946 ||
1947 ((SvNV(right) > 0) &&
1948 ((SvUV(right) > (UV)IV_MAX) ||
1949 (SvNV(right) > (NV)UV_MAX))))))
1950#endif
076d9a11 1951 DIE(aTHX_ "Range iterator outside integer range");
d01136d6
BS
1952 cx->blk_loop.state_u.lazyiv.cur = SvIV(sv);
1953 cx->blk_loop.state_u.lazyiv.end = SvIV(right);
d4665a05
DM
1954#ifdef DEBUGGING
1955 /* for correct -Dstv display */
1956 cx->blk_oldsp = sp - PL_stack_base;
1957#endif
89ea2908 1958 }
3f63a782 1959 else {
d01136d6
BS
1960 cx->cx_type &= ~CXTYPEMASK;
1961 cx->cx_type |= CXt_LOOP_LAZYSV;
1962 /* Make sure that no-one re-orders cop.h and breaks our
1963 assumptions */
1964 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
1965 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
1966 cx->blk_loop.state_u.lazysv.end = right;
1967 SvREFCNT_inc(right);
1968 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
1969 /* This will do the upgrade to SVt_PV, and warn if the value
1970 is uninitialised. */
10516c54 1971 (void) SvPV_nolen_const(right);
267cc4a8
NC
1972 /* Doing this avoids a check every time in pp_iter in pp_hot.c
1973 to replace !SvOK() with a pointer to "". */
1974 if (!SvOK(right)) {
1975 SvREFCNT_dec(right);
d01136d6 1976 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 1977 }
3f63a782 1978 }
89ea2908 1979 }
d01136d6 1980 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 1981 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
1982 SvREFCNT_inc(maybe_ary);
1983 cx->blk_loop.state_u.ary.ix =
1984 (PL_op->op_private & OPpITER_REVERSED) ?
1985 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
1986 -1;
ef3e5ea9 1987 }
89ea2908 1988 }
d01136d6
BS
1989 else { /* iterating over items on the stack */
1990 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 1991 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 1992 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1993 }
1994 else {
d01136d6 1995 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 1996 }
4633a7c4 1997 }
a0d0e21e
LW
1998
1999 RETURN;
2000}
2001
2002PP(pp_enterloop)
2003{
27da23d5 2004 dVAR; dSP;
c09156bb 2005 register PERL_CONTEXT *cx;
f54cb97a 2006 const I32 gimme = GIMME_V;
a0d0e21e
LW
2007
2008 ENTER;
2009 SAVETMPS;
2010 ENTER;
2011
3b719c58
NC
2012 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2013 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2014
2015 RETURN;
2016}
2017
2018PP(pp_leaveloop)
2019{
27da23d5 2020 dVAR; dSP;
c09156bb 2021 register PERL_CONTEXT *cx;
a0d0e21e
LW
2022 I32 gimme;
2023 SV **newsp;
2024 PMOP *newpm;
2025 SV **mark;
2026
2027 POPBLOCK(cx,newpm);
3b719c58 2028 assert(CxTYPE_is_LOOP(cx));
4fdae800 2029 mark = newsp;
a8bba7fa 2030 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2031
a1f49e72 2032 TAINT_NOT;
54310121 2033 if (gimme == G_VOID)
6f207bd3 2034 NOOP;
54310121
PP
2035 else if (gimme == G_SCALAR) {
2036 if (mark < SP)
2037 *++newsp = sv_mortalcopy(*SP);
2038 else
3280af22 2039 *++newsp = &PL_sv_undef;
a0d0e21e
LW
2040 }
2041 else {
a1f49e72 2042 while (mark < SP) {
a0d0e21e 2043 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
2044 TAINT_NOT; /* Each item is independent */
2045 }
a0d0e21e 2046 }
f86702cc
PP
2047 SP = newsp;
2048 PUTBACK;
2049
a8bba7fa 2050 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2051 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2052
a0d0e21e
LW
2053 LEAVE;
2054 LEAVE;
2055
f86702cc 2056 return NORMAL;
a0d0e21e
LW
2057}
2058
2059PP(pp_return)
2060{
27da23d5 2061 dVAR; dSP; dMARK;
c09156bb 2062 register PERL_CONTEXT *cx;
f86702cc 2063 bool popsub2 = FALSE;
b45de488 2064 bool clear_errsv = FALSE;
a0d0e21e
LW
2065 I32 gimme;
2066 SV **newsp;
2067 PMOP *newpm;
2068 I32 optype = 0;
b0d9ce38 2069 SV *sv;
f39bc417 2070 OP *retop;
a0d0e21e 2071
0bd48802
AL
2072 const I32 cxix = dopoptosub(cxstack_ix);
2073
9850bf21
RH
2074 if (cxix < 0) {
2075 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2076 * sort block, which is a CXt_NULL
2077 * not a CXt_SUB */
2078 dounwind(0);
d7507f74
RH
2079 PL_stack_base[1] = *PL_stack_sp;
2080 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2081 return 0;
2082 }
9850bf21
RH
2083 else
2084 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2085 }
a0d0e21e
LW
2086 if (cxix < cxstack_ix)
2087 dounwind(cxix);
2088
d7507f74
RH
2089 if (CxMULTICALL(&cxstack[cxix])) {
2090 gimme = cxstack[cxix].blk_gimme;
2091 if (gimme == G_VOID)
2092 PL_stack_sp = PL_stack_base;
2093 else if (gimme == G_SCALAR) {
2094 PL_stack_base[1] = *PL_stack_sp;
2095 PL_stack_sp = PL_stack_base + 1;
2096 }
9850bf21 2097 return 0;
d7507f74 2098 }
9850bf21 2099
a0d0e21e 2100 POPBLOCK(cx,newpm);
6b35e009 2101 switch (CxTYPE(cx)) {
a0d0e21e 2102 case CXt_SUB:
f86702cc 2103 popsub2 = TRUE;
f39bc417 2104 retop = cx->blk_sub.retop;
5dd42e15 2105 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2106 break;
2107 case CXt_EVAL:
b45de488
GS
2108 if (!(PL_in_eval & EVAL_KEEPERR))
2109 clear_errsv = TRUE;
a0d0e21e 2110 POPEVAL(cx);
f39bc417 2111 retop = cx->blk_eval.retop;
1d76a5c3
GS
2112 if (CxTRYBLOCK(cx))
2113 break;
067f92a0 2114 lex_end();
748a9306
LW
2115 if (optype == OP_REQUIRE &&
2116 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2117 {
54310121 2118 /* Unassume the success we assumed earlier. */
901017d6 2119 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2120 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2121 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2122 }
a0d0e21e 2123 break;
7766f137
GS
2124 case CXt_FORMAT:
2125 POPFORMAT(cx);
f39bc417 2126 retop = cx->blk_sub.retop;
7766f137 2127 break;
a0d0e21e 2128 default:
cea2e8a9 2129 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2130 }
2131
a1f49e72 2132 TAINT_NOT;
a0d0e21e 2133 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2134 if (MARK < SP) {
2135 if (popsub2) {
a8bba7fa 2136 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2137 if (SvTEMP(TOPs)) {
2138 *++newsp = SvREFCNT_inc(*SP);
2139 FREETMPS;
2140 sv_2mortal(*newsp);
959e3673
GS
2141 }
2142 else {
2143 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2144 FREETMPS;
959e3673
GS
2145 *++newsp = sv_mortalcopy(sv);
2146 SvREFCNT_dec(sv);
a29cdaf0 2147 }
959e3673
GS
2148 }
2149 else
a29cdaf0 2150 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2151 }
2152 else
a29cdaf0 2153 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2154 }
2155 else
3280af22 2156 *++newsp = &PL_sv_undef;
a0d0e21e 2157 }
54310121 2158 else if (gimme == G_ARRAY) {
a1f49e72 2159 while (++MARK <= SP) {
f86702cc
PP
2160 *++newsp = (popsub2 && SvTEMP(*MARK))
2161 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2162 TAINT_NOT; /* Each item is independent */
2163 }
a0d0e21e 2164 }
3280af22 2165 PL_stack_sp = newsp;
a0d0e21e 2166
5dd42e15 2167 LEAVE;
f86702cc
PP
2168 /* Stack values are safe: */
2169 if (popsub2) {
5dd42e15 2170 cxstack_ix--;
b0d9ce38 2171 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2172 }
b0d9ce38 2173 else
c445ea15 2174 sv = NULL;
3280af22 2175 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2176
b0d9ce38 2177 LEAVESUB(sv);
8433848b 2178 if (clear_errsv) {
ab69dbc2 2179 CLEAR_ERRSV();
8433848b 2180 }
f39bc417 2181 return retop;
a0d0e21e
LW
2182}
2183
2184PP(pp_last)
2185{
27da23d5 2186 dVAR; dSP;
a0d0e21e 2187 I32 cxix;
c09156bb 2188 register PERL_CONTEXT *cx;
f86702cc 2189 I32 pop2 = 0;
a0d0e21e 2190 I32 gimme;
8772537c 2191 I32 optype;
a0d0e21e
LW
2192 OP *nextop;
2193 SV **newsp;
2194 PMOP *newpm;
a8bba7fa 2195 SV **mark;
c445ea15 2196 SV *sv = NULL;
9d4ba2ae 2197
a0d0e21e 2198
533c011a 2199 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2200 cxix = dopoptoloop(cxstack_ix);
2201 if (cxix < 0)
a651a37d 2202 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2203 }
2204 else {
2205 cxix = dopoptolabel(cPVOP->op_pv);
2206 if (cxix < 0)
cea2e8a9 2207 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2208 }
2209 if (cxix < cxstack_ix)
2210 dounwind(cxix);
2211
2212 POPBLOCK(cx,newpm);
5dd42e15 2213 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2214 mark = newsp;
6b35e009 2215 switch (CxTYPE(cx)) {
c6fdafd0 2216 case CXt_LOOP_LAZYIV:
d01136d6 2217 case CXt_LOOP_LAZYSV:
3b719c58
NC
2218 case CXt_LOOP_FOR:
2219 case CXt_LOOP_PLAIN:
2220 pop2 = CxTYPE(cx);
a8bba7fa 2221 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2222 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2223 break;
f86702cc 2224 case CXt_SUB:
f86702cc 2225 pop2 = CXt_SUB;
f39bc417 2226 nextop = cx->blk_sub.retop;
a0d0e21e 2227 break;
f86702cc
PP
2228 case CXt_EVAL:
2229 POPEVAL(cx);
f39bc417 2230 nextop = cx->blk_eval.retop;
a0d0e21e 2231 break;
7766f137
GS
2232 case CXt_FORMAT:
2233 POPFORMAT(cx);
f39bc417 2234 nextop = cx->blk_sub.retop;
7766f137 2235 break;
a0d0e21e 2236 default:
cea2e8a9 2237 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2238 }
2239
a1f49e72 2240 TAINT_NOT;
a0d0e21e 2241 if (gimme == G_SCALAR) {
f86702cc
PP
2242 if (MARK < SP)
2243 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2244 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2245 else
3280af22 2246 *++newsp = &PL_sv_undef;
a0d0e21e 2247 }
54310121 2248 else if (gimme == G_ARRAY) {
a1f49e72 2249 while (++MARK <= SP) {
f86702cc
PP
2250 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2251 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2252 TAINT_NOT; /* Each item is independent */
2253 }
f86702cc
PP
2254 }
2255 SP = newsp;
2256 PUTBACK;
2257
5dd42e15
DM
2258 LEAVE;
2259 cxstack_ix--;
f86702cc
PP
2260 /* Stack values are safe: */
2261 switch (pop2) {
c6fdafd0 2262 case CXt_LOOP_LAZYIV:
3b719c58 2263 case CXt_LOOP_PLAIN:
d01136d6 2264 case CXt_LOOP_LAZYSV:
3b719c58 2265 case CXt_LOOP_FOR:
a8bba7fa 2266 POPLOOP(cx); /* release loop vars ... */
4fdae800 2267 LEAVE;
f86702cc
PP
2268 break;
2269 case CXt_SUB:
b0d9ce38 2270 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2271 break;
a0d0e21e 2272 }
3280af22 2273 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2274
b0d9ce38 2275 LEAVESUB(sv);
9d4ba2ae
AL
2276 PERL_UNUSED_VAR(optype);
2277 PERL_UNUSED_VAR(gimme);
f86702cc 2278 return nextop;
a0d0e21e
LW
2279}
2280
2281PP(pp_next)
2282{
27da23d5 2283 dVAR;
a0d0e21e 2284 I32 cxix;
c09156bb 2285 register PERL_CONTEXT *cx;
85538317 2286 I32 inner;
a0d0e21e 2287
533c011a 2288 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2289 cxix = dopoptoloop(cxstack_ix);
2290 if (cxix < 0)
a651a37d 2291 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2292 }
2293 else {
2294 cxix = dopoptolabel(cPVOP->op_pv);
2295 if (cxix < 0)
cea2e8a9 2296 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2297 }
2298 if (cxix < cxstack_ix)
2299 dounwind(cxix);
2300
85538317
GS
2301 /* clear off anything above the scope we're re-entering, but
2302 * save the rest until after a possible continue block */
2303 inner = PL_scopestack_ix;
1ba6ee2b 2304 TOPBLOCK(cx);
85538317
GS
2305 if (PL_scopestack_ix < inner)
2306 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2307 PL_curcop = cx->blk_oldcop;
022eaa24 2308 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2309}
2310
2311PP(pp_redo)
2312{
27da23d5 2313 dVAR;
a0d0e21e 2314 I32 cxix;
c09156bb 2315 register PERL_CONTEXT *cx;
a0d0e21e 2316 I32 oldsave;
a034e688 2317 OP* redo_op;
a0d0e21e 2318
533c011a 2319 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2320 cxix = dopoptoloop(cxstack_ix);
2321 if (cxix < 0)
a651a37d 2322 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2323 }
2324 else {
2325 cxix = dopoptolabel(cPVOP->op_pv);
2326 if (cxix < 0)
cea2e8a9 2327 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2328 }
2329 if (cxix < cxstack_ix)
2330 dounwind(cxix);
2331
022eaa24 2332 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2333 if (redo_op->op_type == OP_ENTER) {
2334 /* pop one less context to avoid $x being freed in while (my $x..) */
2335 cxstack_ix++;
2336 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2337 redo_op = redo_op->op_next;
2338 }
2339
a0d0e21e 2340 TOPBLOCK(cx);
3280af22 2341 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2342 LEAVE_SCOPE(oldsave);
936c78b5 2343 FREETMPS;
3a1b2b9e 2344 PL_curcop = cx->blk_oldcop;
a034e688 2345 return redo_op;
a0d0e21e
LW
2346}
2347
0824fdcb 2348STATIC OP *
bfed75c6 2349S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2350{
97aff369 2351 dVAR;
a0d0e21e 2352 OP **ops = opstack;
bfed75c6 2353 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2354
7918f24d
NC
2355 PERL_ARGS_ASSERT_DOFINDLABEL;
2356
fc36a67e 2357 if (ops >= oplimit)
cea2e8a9 2358 Perl_croak(aTHX_ too_deep);
11343788
MB
2359 if (o->op_type == OP_LEAVE ||
2360 o->op_type == OP_SCOPE ||
2361 o->op_type == OP_LEAVELOOP ||
33d34e4c 2362 o->op_type == OP_LEAVESUB ||
11343788 2363 o->op_type == OP_LEAVETRY)
fc36a67e 2364 {
5dc0d613 2365 *ops++ = cUNOPo->op_first;
fc36a67e 2366 if (ops >= oplimit)
cea2e8a9 2367 Perl_croak(aTHX_ too_deep);
fc36a67e 2368 }
c4aa4e48 2369 *ops = 0;
11343788 2370 if (o->op_flags & OPf_KIDS) {
aec46f14 2371 OP *kid;
a0d0e21e 2372 /* First try all the kids at this level, since that's likeliest. */
11343788 2373 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48 2374 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
4b65a919 2375 CopLABEL(kCOP) && strEQ(CopLABEL(kCOP), label))
a0d0e21e
LW
2376 return kid;
2377 }
11343788 2378 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2379 if (kid == PL_lastgotoprobe)
a0d0e21e 2380 continue;
ed8d0fe2
SM
2381 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2382 if (ops == opstack)
2383 *ops++ = kid;
2384 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2385 ops[-1]->op_type == OP_DBSTATE)
2386 ops[-1] = kid;
2387 else
2388 *ops++ = kid;
2389 }
155aba94 2390 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2391 return o;
a0d0e21e
LW
2392 }
2393 }
c4aa4e48 2394 *ops = 0;
a0d0e21e
LW
2395 return 0;
2396}
2397
a0d0e21e
LW
2398PP(pp_goto)
2399{
27da23d5 2400 dVAR; dSP;
cbbf8932 2401 OP *retop = NULL;
a0d0e21e 2402 I32 ix;
c09156bb 2403 register PERL_CONTEXT *cx;
fc36a67e
PP
2404#define GOTO_DEPTH 64
2405 OP *enterops[GOTO_DEPTH];
cbbf8932 2406 const char *label = NULL;
bfed75c6
AL
2407 const bool do_dump = (PL_op->op_type == OP_DUMP);
2408 static const char must_have_label[] = "goto must have label";
a0d0e21e 2409
533c011a 2410 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2411 SV * const sv = POPs;
a0d0e21e
LW
2412
2413 /* This egregious kludge implements goto &subroutine */
2414 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2415 I32 cxix;
c09156bb 2416 register PERL_CONTEXT *cx;
ea726b52 2417 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW
2418 SV** mark;
2419 I32 items = 0;
2420 I32 oldsave;
b1464ded 2421 bool reified = 0;
a0d0e21e 2422
e8f7dd13 2423 retry:
4aa0a1f7 2424 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2425 const GV * const gv = CvGV(cv);
e8f7dd13 2426 if (gv) {
7fc63493 2427 GV *autogv;
e8f7dd13
GS
2428 SV *tmpstr;
2429 /* autoloaded stub? */
2430 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2431 goto retry;
2432 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2433 GvNAMELEN(gv), FALSE);
2434 if (autogv && (cv = GvCV(autogv)))
2435 goto retry;
2436 tmpstr = sv_newmortal();
c445ea15 2437 gv_efullname3(tmpstr, gv, NULL);
be2597df 2438 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2439 }
cea2e8a9 2440 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2441 }
2442
a0d0e21e 2443 /* First do some returnish stuff. */
b37c2d43 2444 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2445 FREETMPS;
a0d0e21e
LW
2446 cxix = dopoptosub(cxstack_ix);
2447 if (cxix < 0)
cea2e8a9 2448 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2449 if (cxix < cxstack_ix)
2450 dounwind(cxix);
2451 TOPBLOCK(cx);
2d43a17f 2452 SPAGAIN;
564abe23 2453 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2454 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2455 if (CxREALEVAL(cx))
2456 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2457 else
2458 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2459 }
9850bf21
RH
2460 else if (CxMULTICALL(cx))
2461 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2462 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2463 /* put @_ back onto stack */
a0d0e21e 2464 AV* av = cx->blk_sub.argarray;
bfed75c6 2465
93965878 2466 items = AvFILLp(av) + 1;
a45cdc79
DM
2467 EXTEND(SP, items+1); /* @_ could have been extended. */
2468 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2469 SvREFCNT_dec(GvAV(PL_defgv));
2470 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2471 CLEAR_ARGARRAY(av);
d8b46c1b 2472 /* abandon @_ if it got reified */
62b1ebc2 2473 if (AvREAL(av)) {
b1464ded
DM
2474 reified = 1;
2475 SvREFCNT_dec(av);
d8b46c1b
GS
2476 av = newAV();
2477 av_extend(av, items-1);
11ca45c0 2478 AvREIFY_only(av);
ad64d0ec 2479 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2480 }
a0d0e21e 2481 }
aed2304a 2482 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2483 AV* const av = GvAV(PL_defgv);
1fa4e549 2484 items = AvFILLp(av) + 1;
a45cdc79
DM
2485 EXTEND(SP, items+1); /* @_ could have been extended. */
2486 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2487 }
a45cdc79
DM
2488 mark = SP;
2489 SP += items;
6b35e009 2490 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2491 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2492 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2493 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2494 LEAVE_SCOPE(oldsave);
2495
2496 /* Now do some callish stuff. */
2497 SAVETMPS;
5023d17a 2498 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2499 if (CvISXSUB(cv)) {
b37c2d43 2500 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2501 SV **newsp;
2502 I32 gimme;
b1464ded
DM
2503 if (reified) {
2504 I32 index;
2505 for (index=0; index<items; index++)
2506 sv_2mortal(SP[-index]);
2507 }
1fa4e549 2508
b37c2d43
AL
2509 /* XS subs don't have a CxSUB, so pop it */
2510 POPBLOCK(cx, PL_curpm);
2511 /* Push a mark for the start of arglist */
2512 PUSHMARK(mark);
2513 PUTBACK;
2514 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2515 LEAVE;
5eff7df7 2516 return retop;
a0d0e21e
LW
2517 }
2518 else {
b37c2d43 2519 AV* const padlist = CvPADLIST(cv);
6b35e009 2520 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2521 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2522 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2523 cx->cx_type = CXt_SUB;
b150fb22 2524 }
a0d0e21e 2525 cx->blk_sub.cv = cv;
1a5b3db4 2526 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2527
a0d0e21e
LW
2528 CvDEPTH(cv)++;
2529 if (CvDEPTH(cv) < 2)
74c765eb 2530 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2531 else {
2b9dff67 2532 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2533 sub_crush_depth(cv);
26019298 2534 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2535 }
fd617465
DM
2536 SAVECOMPPAD();
2537 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2538 if (CxHASARGS(cx))
6d4ff0d2 2539 {
502c6561 2540 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2541
3280af22 2542 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2543 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2544 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2545 cx->blk_sub.argarray = av;
a0d0e21e
LW
2546
2547 if (items >= AvMAX(av) + 1) {
b37c2d43 2548 SV **ary = AvALLOC(av);
a0d0e21e
LW
2549 if (AvARRAY(av) != ary) {
2550 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2551 AvARRAY(av) = ary;
a0d0e21e
LW
2552 }
2553 if (items >= AvMAX(av) + 1) {
2554 AvMAX(av) = items - 1;
2555 Renew(ary,items+1,SV*);
2556 AvALLOC(av) = ary;
9c6bc640 2557 AvARRAY(av) = ary;
a0d0e21e
LW
2558 }
2559 }
a45cdc79 2560 ++mark;
a0d0e21e 2561 Copy(mark,AvARRAY(av),items,SV*);
93965878 2562 AvFILLp(av) = items - 1;
d8b46c1b 2563 assert(!AvREAL(av));
b1464ded
DM
2564 if (reified) {
2565 /* transfer 'ownership' of refcnts to new @_ */
2566 AvREAL_on(av);
2567 AvREIFY_off(av);
2568 }
a0d0e21e
LW
2569 while (items--) {
2570 if (*mark)
2571 SvTEMP_off(*mark);
2572 mark++;
2573 }
2574 }
491527d0 2575 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2576 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2577 if (PERLDB_GOTO) {
b96d8cd9 2578 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2579 if (gotocv) {
2580 PUSHMARK( PL_stack_sp );
ad64d0ec 2581 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2582 PL_stack_sp--;
2583 }
491527d0 2584 }
1ce6579f 2585 }
a0d0e21e
LW
2586 RETURNOP(CvSTART(cv));
2587 }
2588 }
1614b0e3 2589 else {
0510663f 2590 label = SvPV_nolen_const(sv);
1614b0e3 2591 if (!(do_dump || *label))
cea2e8a9 2592 DIE(aTHX_ must_have_label);
1614b0e3 2593 }
a0d0e21e 2594 }
533c011a 2595 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2596 if (! do_dump)
cea2e8a9 2597 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2598 }
2599 else
2600 label = cPVOP->op_pv;
2601
2602 if (label && *label) {
cbbf8932 2603 OP *gotoprobe = NULL;
3b2447bc 2604 bool leaving_eval = FALSE;
33d34e4c 2605 bool in_block = FALSE;
cbbf8932 2606 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2607
2608 /* find label */
2609
d4c19fe8 2610 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2611 *enterops = 0;
2612 for (ix = cxstack_ix; ix >= 0; ix--) {
2613 cx = &cxstack[ix];
6b35e009 2614 switch (CxTYPE(cx)) {
a0d0e21e 2615 case CXt_EVAL:
3b2447bc 2616 leaving_eval = TRUE;
971ecbe6 2617 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2618 gotoprobe = (last_eval_cx ?
2619 last_eval_cx->blk_eval.old_eval_root :
2620 PL_eval_root);
2621 last_eval_cx = cx;
9c5794fe
RH
2622 break;
2623 }
2624 /* else fall through */
c6fdafd0 2625 case CXt_LOOP_LAZYIV:
d01136d6 2626 case CXt_LOOP_LAZYSV:
3b719c58
NC
2627 case CXt_LOOP_FOR:
2628 case CXt_LOOP_PLAIN:
bb5aedc1
VP
2629 case CXt_GIVEN:
2630 case CXt_WHEN:
a0d0e21e
LW
2631 gotoprobe = cx->blk_oldcop->op_sibling;
2632 break;
2633 case CXt_SUBST:
2634 continue;
2635 case CXt_BLOCK:
33d34e4c 2636 if (ix) {
a0d0e21e 2637 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2638 in_block = TRUE;
2639 } else
3280af22 2640 gotoprobe = PL_main_root;
a0d0e21e 2641 break;
b3933176 2642 case CXt_SUB:
9850bf21 2643 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2644 gotoprobe = CvROOT(cx->blk_sub.cv);
2645 break;
2646 }
2647 /* FALL THROUGH */
7766f137 2648 case CXt_FORMAT:
0a753a76 2649 case CXt_NULL:
a651a37d 2650 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2651 default:
2652 if (ix)
cea2e8a9 2653 DIE(aTHX_ "panic: goto");
3280af22 2654 gotoprobe = PL_main_root;
a0d0e21e
LW
2655 break;
2656 }
2b597662
GS
2657 if (gotoprobe) {
2658 retop = dofindlabel(gotoprobe, label,
2659 enterops, enterops + GOTO_DEPTH);
2660 if (retop)
2661 break;
2662 }
3280af22 2663 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2664 }
2665 if (!retop)
cea2e8a9 2666 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2667
3b2447bc
RH
2668 /* if we're leaving an eval, check before we pop any frames
2669 that we're not going to punt, otherwise the error
2670 won't be caught */
2671
2672 if (leaving_eval && *enterops && enterops[1]) {
2673 I32 i;
2674 for (i = 1; enterops[i]; i++)
2675 if (enterops[i]->op_type == OP_ENTERITER)
2676 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2677 }
2678
a0d0e21e
LW
2679 /* pop unwanted frames */
2680
2681 if (ix < cxstack_ix) {
2682 I32 oldsave;
2683
2684 if (ix < 0)
2685 ix = 0;
2686 dounwind(ix);
2687 TOPBLOCK(cx);
3280af22 2688 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2689 LEAVE_SCOPE(oldsave);
2690 }
2691
2692 /* push wanted frames */
2693
748a9306 2694 if (*enterops && enterops[1]) {
0bd48802 2695 OP * const oldop = PL_op;
33d34e4c
AE
2696 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2697 for (; enterops[ix]; ix++) {
533c011a 2698 PL_op = enterops[ix];
84902520
TB
2699 /* Eventually we may want to stack the needed arguments
2700 * for each op. For now, we punt on the hard ones. */
533c011a 2701 if (PL_op->op_type == OP_ENTERITER)
894356b3 2702 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2703 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2704 }
533c011a 2705 PL_op = oldop;
a0d0e21e
LW
2706 }
2707 }
2708
2709 if (do_dump) {
a5f75d66 2710#ifdef VMS
6b88bc9c 2711 if (!retop) retop = PL_main_start;
a5f75d66 2712#endif
3280af22
NIS
2713 PL_restartop = retop;
2714 PL_do_undump = TRUE;
a0d0e21e
LW
2715
2716 my_unexec();
2717
3280af22
NIS
2718 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2719 PL_do_undump = FALSE;
a0d0e21e
LW
2720 }
2721
2722 RETURNOP(retop);
2723}
2724
2725PP(pp_exit)
2726{
97aff369 2727 dVAR;
39644a26 2728 dSP;
a0d0e21e
LW
2729 I32 anum;
2730
2731 if (MAXARG < 1)
2732 anum = 0;
ff0cee69 2733 else {
a0d0e21e 2734 anum = SvIVx(POPs);
d98f61e7
GS
2735#ifdef VMS
2736 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2737 anum = 0;
96e176bf 2738 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2739#endif
2740 }
cc3604b1 2741 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2742#ifdef PERL_MAD
2743 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2744 if (anum || !(PL_minus_c && PL_madskills))
2745 my_exit(anum);
2746#else
a0d0e21e 2747 my_exit(anum);
81d86705 2748#endif
3280af22 2749 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2750 RETURN;
2751}
2752
a0d0e21e
LW
2753/* Eval. */
2754
0824fdcb 2755STATIC void
cea2e8a9 2756S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2757{
504618e9 2758 const char *s = SvPVX_const(sv);
890ce7af 2759 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2760 I32 line = 1;
a0d0e21e 2761
7918f24d
NC
2762 PERL_ARGS_ASSERT_SAVE_LINES;
2763
a0d0e21e 2764 while (s && s < send) {
f54cb97a 2765 const char *t;
b9f83d2f 2766 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2767
1d963ff3 2768 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
2769 if (t)
2770 t++;
2771 else
2772 t = send;
2773
2774 sv_setpvn(tmpstr, s, t - s);
2775 av_store(array, line++, tmpstr);
2776 s = t;
2777 }
2778}
2779
0824fdcb 2780STATIC OP *
cea2e8a9 2781S_docatch(pTHX_ OP *o)
1e422769 2782{
97aff369 2783 dVAR;
6224f72b 2784 int ret;
06b5626a 2785 OP * const oldop = PL_op;
db36c5a1 2786 dJMPENV;
1e422769 2787
1e422769 2788#ifdef DEBUGGING
54310121 2789 assert(CATCH_GET == TRUE);
1e422769 2790#endif
312caa8e 2791 PL_op = o;
8bffa5f8 2792
14dd3ad8 2793 JMPENV_PUSH(ret);
6224f72b 2794 switch (ret) {
312caa8e 2795 case 0:
abd70938
DM
2796 assert(cxstack_ix >= 0);
2797 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2798 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2799 redo_body:
85aaa934 2800 CALLRUNOPS(aTHX);
312caa8e
CS
2801 break;
2802 case 3:
8bffa5f8 2803 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2804
2805 /* NB XXX we rely on the old popped CxEVAL still being at the top
2806 * of the stack; the way die_where() currently works, this
2807 * assumption is valid. In theory The cur_top_env value should be
2808 * returned in another global, the way retop (aka PL_restartop)
2809 * is. */
2810 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2811
2812 if (PL_restartop
2813 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2814 {
312caa8e
CS
2815 PL_op = PL_restartop;
2816 PL_restartop = 0;
2817 goto redo_body;
2818 }
2819 /* FALL THROUGH */
2820 default:
14dd3ad8 2821 JMPENV_POP;
533c011a 2822 PL_op = oldop;
6224f72b 2823 JMPENV_JUMP(ret);
1e422769 2824 /* NOTREACHED */
1e422769 2825 }
14dd3ad8 2826 JMPENV_POP;
533c011a 2827 PL_op = oldop;
5f66b61c 2828 return NULL;
1e422769
PP
2829}
2830
c277df42 2831OP *
bfed75c6 2832Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2833/* sv Text to convert to OP tree. */
2834/* startop op_free() this to undo. */
2835/* code Short string id of the caller. */
2836{
f7997f86 2837 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2838 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2839 PERL_CONTEXT *cx;
2840 SV **newsp;
b094c71d 2841 I32 gimme = G_VOID;
c277df42
IZ
2842 I32 optype;
2843 OP dummy;
83ee9e09
GS
2844 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2845 char *tmpbuf = tbuf;
c277df42 2846 char *safestr;
a3985cdc 2847 int runtime;
601f1833 2848 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2849 STRLEN len;
c277df42 2850
7918f24d
NC
2851 PERL_ARGS_ASSERT_SV_COMPILE_2OP;
2852
c277df42 2853 ENTER;
5486870f 2854 lex_start(sv, NULL, FALSE);
c277df42
IZ
2855 SAVETMPS;
2856 /* switch to eval mode */
2857
923e4eb5 2858 if (IN_PERL_COMPILETIME) {
f4dd75d9 2859 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2860 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2861 }
83ee9e09 2862 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2863 SV * const sv = sv_newmortal();
83ee9e09
GS
2864 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2865 code, (unsigned long)++PL_evalseq,
2866 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2867 tmpbuf = SvPVX(sv);
fc009855 2868 len = SvCUR(sv);
83ee9e09
GS
2869 }
2870 else
d9fad198
JH
2871 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2872 (unsigned long)++PL_evalseq);
f4dd75d9 2873 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2874 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2875 SAVECOPLINE(&PL_compiling);
57843af0 2876 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2877 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2878 deleting the eval's FILEGV from the stash before gv_check() runs
2879 (i.e. before run-time proper). To work around the coredump that
2880 ensues, we always turn GvMULTI_on for any globals that were
2881 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2882 safestr = savepvn(tmpbuf, len);
2883 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2884 SAVEHINTS();
d1ca3daa 2885#ifdef OP_IN_REGISTER
6b88bc9c 2886 PL_opsave = op;
d1ca3daa 2887#else
7766f137 2888 SAVEVPTR(PL_op);
d1ca3daa 2889#endif
c277df42 2890
a3985cdc 2891 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2892 runtime = IN_PERL_RUNTIME;
a3985cdc 2893 if (runtime)
d819b83a 2894 runcv = find_runcv(NULL);
a3985cdc 2895
533c011a 2896 PL_op = &dummy;
13b51b79 2897 PL_op->op_type = OP_ENTEREVAL;
533c011a 2898 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2899 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 2900 PUSHEVAL(cx, 0);
a3985cdc
DM
2901
2902 if (runtime)
410be5db 2903 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2904 else
410be5db 2905 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2906 POPBLOCK(cx,PL_curpm);
e84b9f1f 2907 POPEVAL(cx);
c277df42
IZ
2908
2909 (*startop)->op_type = OP_NULL;
22c35a8c 2910 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2911 lex_end();
f3548bdc 2912 /* XXX DAPM do this properly one year */
502c6561 2913 *padp = MUTABLE_AV(SvREFCNT_inc_simple(PL_comppad));
c277df42 2914 LEAVE;
923e4eb5 2915 if (IN_PERL_COMPILETIME)
623e6609 2916 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2917#ifdef OP_IN_REGISTER
6b88bc9c 2918 op = PL_opsave;
d1ca3daa 2919#endif
9d4ba2ae
AL
2920 PERL_UNUSED_VAR(newsp);
2921 PERL_UNUSED_VAR(optype);
2922
410be5db 2923 return PL_eval_start;
c277df42
IZ
2924}
2925
a3985cdc
DM
2926
2927/*
2928=for apidoc find_runcv
2929
2930Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2931If db_seqp is non_null, skip CVs that are in the DB package and populate
2932*db_seqp with the cop sequence number at the point that the DB:: code was
2933entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2934than in the scope of the debugger itself).
a3985cdc
DM
2935
2936=cut
2937*/
2938
2939CV*
d819b83a 2940Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2941{
97aff369 2942 dVAR;
a3985cdc 2943 PERL_SI *si;
a3985cdc 2944
d819b83a
DM
2945 if (db_seqp)
2946 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2947 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2948 I32 ix;
a3985cdc 2949 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2950 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2951 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2952 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2953 /* skip DB:: code */
2954 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2955 *db_seqp = cx->blk_oldcop->cop_seq;
2956 continue;
2957 }
2958 return cv;
2959 }
a3985cdc
DM
2960 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2961 return PL_compcv;
2962 }
2963 }
2964 return PL_main_cv;
2965}
2966
2967
2968/* Compile a require/do, an eval '', or a /(?{...})/.
2969 * In the last case, startop is non-null, and contains the address of
2970 * a pointer that should be set to the just-compiled code.
2971 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM
2972 * Returns a bool indicating whether the compile was successful; if so,
2973 * PL_eval_start contains the first op of the compiled ocde; otherwise,
2974 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM
2975 */
2976
410be5db 2977STATIC bool
a3985cdc 2978S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2979{
27da23d5 2980 dVAR; dSP;
46c461b5 2981 OP * const saveop = PL_op;
a0d0e21e 2982
6dc8a9e4
IZ
2983 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2984 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2985 : EVAL_INEVAL);
a0d0e21e 2986
1ce6579f
PP
2987 PUSHMARK(SP);
2988
3280af22 2989 SAVESPTR(PL_compcv);
ea726b52 2990 PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
1aff0e91 2991 CvEVAL_on(PL_compcv);
2090ab20
JH
2992 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2993 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2994
a3985cdc 2995 CvOUTSIDE_SEQ(PL_compcv) = seq;
ea726b52 2996 CvOUTSIDE(PL_compcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 2997
dd2155a4 2998 /* set up a scratch pad */
a0d0e21e 2999
dd2155a4 3000 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 3001 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3002
07055b4c 3003
81d86705
NC
3004 if (!PL_madskills)
3005 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 3006
a0d0e21e
LW
3007 /* make sure we compile in the right package */
3008
ed094faf 3009 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 3010 SAVESPTR(PL_curstash);
ed094faf 3011 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 3012 }
3c10abe3 3013 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
3014 SAVESPTR(PL_beginav);
3015 PL_beginav = newAV();
3016 SAVEFREESV(PL_beginav);
3c10abe3
AG
3017 SAVESPTR(PL_unitcheckav);
3018 PL_unitcheckav = newAV();
3019 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3020
81d86705 3021#ifdef PERL_MAD
9da243ce 3022 SAVEBOOL(PL_madskills);
81d86705
NC
3023 PL_madskills = 0;
3024#endif
3025
a0d0e21e
LW
3026 /* try to compile it */
3027
5f66b61c 3028 PL_eval_root = NULL;
3280af22 3029 PL_curcop = &PL_compiling;
fc15ae8f 3030 CopARYBASE_set(PL_curcop, 0);
5f66b61c 3031 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3032 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS
3033 else
3034 CLEAR_ERRSV();
13765c85 3035 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 3036 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 3037 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 3038 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 3039 const char *msg;
bfed75c6 3040
533c011a 3041 PL_op = saveop;
3280af22
NIS
3042 if (PL_eval_root) {
3043 op_free(PL_eval_root);
5f66b61c 3044 PL_eval_root = NULL;
a0d0e21e 3045 }
3280af22 3046 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 3047 if (!startop) {
3280af22 3048 POPBLOCK(cx,PL_curpm);
c277df42 3049 POPEVAL(cx);
c277df42 3050 }
a0d0e21e 3051 lex_end();
f9bddea7 3052 LEAVE; /* pp_entereval knows about this LEAVE. */
9d4ba2ae
AL
3053
3054 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 3055 if (optype == OP_REQUIRE) {
b464bac0 3056 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 3057 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 3058 &PL_sv_undef, 0);
58d3fd3b
SH
3059 Perl_croak(aTHX_ "%sCompilation failed in require",
3060 *msg ? msg : "Unknown error\n");
5a844595
GS
3061 }
3062 else if (startop) {
3280af22 3063 POPBLOCK(cx,PL_curpm);
c277df42 3064 POPEVAL(cx);
5a844595
GS
3065 Perl_croak(aTHX_ "%sCompilation failed in regexp",
3066 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 3067 }
9d7f88dd 3068 else {
9d7f88dd 3069 if (!*msg) {
6502358f 3070 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
3071 }
3072 }
9d4ba2ae 3073 PERL_UNUSED_VAR(newsp);
410be5db
DM
3074 PUSHs(&PL_sv_undef);
3075 PUTBACK;
3076 return FALSE;
a0d0e21e 3077 }
57843af0 3078 CopLINE_set(&PL_compiling, 0);
c277df42 3079 if (startop) {
3280af22 3080 *startop = PL_eval_root;
c277df42 3081 } else
3280af22 3082 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
3083
3084 /* Set the context for this new optree.
3085 * If the last op is an OP_REQUIRE, force scalar context.
3086 * Otherwise, propagate the context from the eval(). */
3087 if (PL_eval_root->op_type == OP_LEAVEEVAL
3088 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
3089 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
3090 == OP_REQUIRE)
3091 scalar(PL_eval_root);
7df0357e 3092 else if ((gimme & G_WANT) == G_VOID)
3280af22 3093 scalarvoid(PL_eval_root);
7df0357e 3094 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3095 list(PL_eval_root);
a0d0e21e 3096 else
3280af22 3097 scalar(PL_eval_root);
a0d0e21e
LW
3098
3099 DEBUG_x(dump_eval());
3100
55497cff 3101 /* Register with debugger: */
6482a30d 3102 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
b96d8cd9 3103 CV * const cv = get_cvs("DB::postponed", 0);
55497cff
PP
3104 if (cv) {
3105 dSP;
924508f0 3106 PUSHMARK(SP);
ad64d0ec 3107 XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling)));
55497cff 3108 PUTBACK;
ad64d0ec 3109 call_sv(MUTABLE_SV(cv), G_DISCARD);
55497cff
PP
3110 }
3111 }
3112
3c10abe3
AG
3113 if (PL_unitcheckav)
3114 call_list(PL_scopestack_ix, PL_unitcheckav);
3115
a0d0e21e
LW
3116 /* compiled okay, so do it */
3117
3280af22
NIS
3118 CvDEPTH(PL_compcv) = 1;
3119 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3120 PL_op = saveop; /* The caller may need it. */
bc177e6b 3121 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3122
410be5db
DM
3123 PUTBACK;
3124 return TRUE;
a0d0e21e
LW
3125}
3126
a6c40364 3127STATIC PerlIO *
0786552a 3128S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP
3129{
3130 Stat_t st;
c445ea15 3131 const int st_rc = PerlLIO_stat(name, &st);
df528165 3132
7918f24d
NC
3133 PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN;
3134
6b845e56 3135 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3136 return NULL;
ce8abf5f
SP
3137 }
3138
0786552a 3139 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP
3140}
3141
75c20bac 3142#ifndef PERL_DISABLE_PMC
ce8abf5f 3143STATIC PerlIO *
0786552a 3144S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3145{
b295d113
TH
3146 PerlIO *fp;
3147
7918f24d
NC
3148 PERL_ARGS_ASSERT_DOOPEN_PM;
3149
ce9440c8 3150 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC
3151 SV *const pmcsv = newSV(namelen + 2);
3152 char *const pmc = SvPVX(pmcsv);
a6c40364 3153 Stat_t pmcstat;
50b8ed39
NC
3154
3155 memcpy(pmc, name, namelen);
3156 pmc[namelen] = 'c';
3157 pmc[namelen + 1] = '\0';
3158
a6c40364 3159 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3160 fp = check_type_and_open(name);
a6c40364
GS
3161 }
3162 else {
0786552a 3163 fp = check_type_and_open(pmc);
b295d113 3164 }
a6c40364
GS
3165 SvREFCNT_dec(pmcsv);
3166 }
3167 else {
0786552a 3168 fp = check_type_and_open(name);
b295d113 3169 }
b295d113 3170 return fp;
75c20bac 3171}
7925835c 3172#else
75c20bac 3173# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3174#endif /* !PERL_DISABLE_PMC */
b295d113 3175
a0d0e21e
LW
3176PP(pp_require)
3177{
27da23d5 3178 dVAR; dSP;
c09156bb 3179 register PERL_CONTEXT *cx;
a0d0e21e 3180 SV *sv;
5c144d81 3181 const char *name;
6132ea6c 3182 STRLEN len;
4492be7a
JM
3183 char * unixname;
3184 STRLEN unixlen;
62f5ad7a 3185#ifdef VMS
4492be7a 3186 int vms_unixname = 0;
62f5ad7a 3187#endif
c445ea15
AL
3188 const char *tryname = NULL;
3189 SV *namesv = NULL;
f54cb97a 3190 const I32 gimme = GIMME_V;
bbed91b5 3191 int filter_has_file = 0;
c445ea15 3192 PerlIO *tryrsfp = NULL;
34113e50 3193 SV *filter_cache = NULL;
c445ea15
AL
3194 SV *filter_state = NULL;
3195 SV *filter_sub = NULL;
3196 SV *hook_sv = NULL;
6ec9efec
JH
3197 SV *encoding;
3198 OP *op;
a0d0e21e
LW
3199
3200 sv = POPs;
d7aa5382 3201 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP
3202 sv = new_version(sv);
3203 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3204 upg_version(PL_patchlevel, TRUE);
149c1637 3205 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3206 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3207 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3208 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3209 }
3210 else {
d1029faa
JP
3211 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3212 I32 first = 0;
3213 AV *lav;
3214 SV * const req = SvRV(sv);
85fbaab2 3215 SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE);
d1029faa
JP
3216
3217 /* get the left hand term */
502c6561 3218 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE)));
d1029faa
JP
3219
3220 first = SvIV(*av_fetch(lav,0,0));
3221 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
85fbaab2 3222 || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
d1029faa
JP
3223 || av_len(lav) > 1 /* FP with > 3 digits */
3224 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3225 ) {
3226 DIE(aTHX_ "Perl %"SVf" required--this is only "
3227 "%"SVf", stopped", SVfARG(vnormal(req)),
3228 SVfARG(vnormal(PL_patchlevel)));
3229 }
3230 else { /* probably 'use 5.10' or 'use 5.8' */
3231 SV * hintsv = newSV(0);
3232 I32 second = 0;
3233
3234 if (av_len(lav)>=1)
3235 second = SvIV(*av_fetch(lav,1,0));
3236
3237 second /= second >= 600 ? 100 : 10;
3238 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.%d",
3239 (int)first, (int)second,0);
3240 upg_version(hintsv, TRUE);
3241
3242 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3243 "--this is only %"SVf", stopped",
3244 SVfARG(vnormal(req)),
3245 SVfARG(vnormal(hintsv)),
3246 SVfARG(vnormal(PL_patchlevel)));
3247 }
3248 }
468aa647 3249 }
d7aa5382 3250
fbc891ce
RB
3251 /* We do this only with use, not require. */
3252 if (PL_compcv &&
fbc891ce
RB
3253 /* If we request a version >= 5.9.5, load feature.pm with the
3254 * feature bundle that corresponds to the required version. */
2e8342de 3255 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3256 SV *const importsv = vnormal(sv);
3257 *SvPVX_mutable(importsv) = ':';
3258 ENTER;
3259 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3260 LEAVE;
3261 }
53eb19dd
SM
3262 /* If a version >= 5.11.0 is requested, strictures are on by default! */
3263 if (PL_compcv &&
3264 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.011000), FALSE))) >= 0) {
5cc917d6 3265 PL_hints |= (HINT_STRICT_REFS | HINT_STRICT_SUBS | HINT_STRICT_VARS);
53eb19dd
SM
3266 }
3267
7dfde25d 3268 RETPUSHYES;
a0d0e21e 3269 }
5c144d81 3270 name = SvPV_const(sv, len);
6132ea6c 3271 if (!(name && len > 0 && *name))
cea2e8a9 3272 DIE(aTHX_ "Null filename used");
4633a7c4 3273 TAINT_PROPER("require");
4492be7a
JM
3274
3275
3276#ifdef VMS
3277 /* The key in the %ENV hash is in the syntax of file passed as the argument
3278 * usually this is in UNIX format, but sometimes in VMS format, which
3279 * can result in a module being pulled in more than once.
3280 * To prevent this, the key must be stored in UNIX format if the VMS
3281 * name can be translated to UNIX.
3282 */
3283 if ((unixname = tounixspec(name, NULL)) != NULL) {
3284 unixlen = strlen(unixname);
3285 vms_unixname = 1;
3286 }
3287 else
3288#endif
3289 {
3290 /* if not VMS or VMS name can not be translated to UNIX, pass it
3291 * through.
3292 */
3293 unixname = (char *) name;
3294 unixlen = len;
3295 }
44f8325f 3296 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM
3297 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3298 unixname, unixlen, 0);
44f8325f
AL
3299 if ( svp ) {
3300 if (*svp != &PL_sv_undef)
3301 RETPUSHYES;
3302 else
087b5369
RD
3303 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3304 "Compilation failed in require", unixname);
44f8325f 3305 }
4d8b06f1 3306 }
a0d0e21e
LW
3307
3308 /* prepare to compile file */
3309
be4b629d 3310 if (path_is_absolute(name)) {
46fc3d4c 3311 tryname = name;
0786552a 3312 tryrsfp = doopen_pm(name, len);
bf4acbe4 3313 }
be4b629d 3314 if (!tryrsfp) {
44f8325f 3315 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3316 I32 i;
748a9306 3317#ifdef VMS
4492be7a 3318 if (vms_unixname)
46fc3d4c
PP
3319#endif
3320 {
d0328fd7 3321 namesv = newSV_type(SVt_PV);
46fc3d4c 3322 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3323 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3324
ad64d0ec 3325 if (SvTIED_mg((const SV *)ar, PERL_MAGIC_tied))
c38a6530 3326 mg_get(dirsv);
bbed91b5
KF
3327 if (SvROK(dirsv)) {
3328 int count;
a3b58a99 3329 SV **svp;
bbed91b5
KF
3330 SV *loader = dirsv;
3331
e14e2dc8
NC
3332 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3333 && !sv_isobject(loader))
3334 {
502c6561 3335 loader = *av_fetch(MUTABLE_AV(SvRV(loader)), 0, TRUE);
bbed91b5
KF
3336 }
3337
b900a521 3338 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3339 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3340 tryname = SvPVX_const(namesv);
c445ea15 3341 tryrsfp = NULL;
bbed91b5
KF
3342
3343 ENTER;
3344 SAVETMPS;
3345 EXTEND(SP, 2);
3346
3347 PUSHMARK(SP);
3348 PUSHs(dirsv);
3349 PUSHs(sv);
3350 PUTBACK;
e982885c
NC
3351 if (sv_isobject(loader))
3352 count = call_method("INC", G_ARRAY);
3353 else
3354 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3355 SPAGAIN;
3356
a3b58a99
RGS
3357 /* Adjust file name if the hook has set an %INC entry */
3358 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3359 if (svp)
d8723a6a 3360 tryname = SvPV_nolen_const(*svp);
a3b58a99 3361
bbed91b5
KF
3362 if (count > 0) {
3363 int i = 0;
3364 SV *arg;
3365
3366 SP -= count - 1;
3367 arg = SP[i++];
3368
34113e50
NC
3369 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3370 && !isGV_with_GP(SvRV(arg))) {
3371 filter_cache = SvRV(arg);
74c765eb 3372 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3373
3374 if (i < count) {
3375 arg = SP[i++];
3376 }
3377 }
3378
6e592b3a 3379 if (SvROK(arg) && isGV_with_GP(SvRV(arg))) {
bbed91b5
KF
3380 arg = SvRV(arg);
3381 }
3382
6e592b3a 3383 if (isGV_with_GP(arg)) {
159b6efe 3384 IO * const io = GvIO((const GV *)arg);
bbed91b5
KF
3385