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[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
d4b87e75
BM
96
97#define tryAMAGICregexp(rx) \
98 STMT_START { \
99 if (SvROK(rx) && SvAMAGIC(rx)) { \
100 SV *sv = AMG_CALLun(rx, regexp); \
101 if (sv) { \
102 if (SvROK(sv)) \
103 sv = SvRV(sv); \
104 if (SvTYPE(sv) != SVt_REGEXP) \
105 Perl_croak(aTHX_ "Overloaded qr did not return a REGEXP"); \
106 rx = sv; \
107 } \
108 } \
109 } STMT_END
110
111
131b3ad0
DM
112 if (PL_op->op_flags & OPf_STACKED) {
113 /* multiple args; concatentate them */
114 dMARK; dORIGMARK;
115 tmpstr = PAD_SV(ARGTARG);
76f68e9b 116 sv_setpvs(tmpstr, "");
131b3ad0 117 while (++MARK <= SP) {
d4b87e75 118 SV *msv = *MARK;
131b3ad0
DM
119 if (PL_amagic_generation) {
120 SV *sv;
d4b87e75
BM
121
122 tryAMAGICregexp(msv);
123
124 if ((SvAMAGIC(tmpstr) || SvAMAGIC(msv)) &&
125 (sv = amagic_call(tmpstr, msv, concat_amg, AMGf_assign)))
131b3ad0
DM
126 {
127 sv_setsv(tmpstr, sv);
128 continue;
129 }
130 }
d4b87e75 131 sv_catsv(tmpstr, msv);
131b3ad0
DM
132 }
133 SvSETMAGIC(tmpstr);
134 SP = ORIGMARK;
135 }
d4b87e75 136 else {
131b3ad0 137 tmpstr = POPs;
d4b87e75
BM
138 tryAMAGICregexp(tmpstr);
139 }
140
141#undef tryAMAGICregexp
513629ba 142
b3eb6a9b 143 if (SvROK(tmpstr)) {
d8f6592e 144 SV * const sv = SvRV(tmpstr);
5c35adbb 145 if (SvTYPE(sv) == SVt_REGEXP)
d2f13c59 146 re = (REGEXP*) sv;
c277df42 147 }
d4b87e75
BM
148 else if (SvTYPE(tmpstr) == SVt_REGEXP)
149 re = (REGEXP*) tmpstr;
150
5c35adbb 151 if (re) {
69dc4b30
FC
152 /* The match's LHS's get-magic might need to access this op's reg-
153 exp (as is sometimes the case with $'; see bug 70764). So we
154 must call get-magic now before we replace the regexp. Hopeful-
155 ly this hack can be replaced with the approach described at
156 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03
157 /msg122415.html some day. */
455d9033
FC
158 if(pm->op_type == OP_MATCH) {
159 SV *lhs;
160 const bool was_tainted = PL_tainted;
161 if (pm->op_flags & OPf_STACKED)
69dc4b30 162 lhs = TOPs;
455d9033
FC
163 else if (pm->op_private & OPpTARGET_MY)
164 lhs = PAD_SV(pm->op_targ);
165 else lhs = DEFSV;
166 SvGETMAGIC(lhs);
167 /* Restore the previous value of PL_tainted (which may have been
168 modified by get-magic), to avoid incorrectly setting the
169 RXf_TAINTED flag further down. */
170 PL_tainted = was_tainted;
171 }
69dc4b30 172
f0826785 173 re = reg_temp_copy(NULL, re);
aaa362c4 174 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 175 PM_SETRE(pm, re);
c277df42
IZ
176 }
177 else {
e62f0680 178 STRLEN len;
3ab4a224 179 const char *t = SvOK(tmpstr) ? SvPV_const(tmpstr, len) : "";
c737faaf 180 re = PM_GETRE(pm);
14a49a24 181 assert (re != (REGEXP*) &PL_sv_undef);
c277df42 182
20408e3c 183 /* Check against the last compiled regexp. */
a11c8683 184 if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
220fc49f 185 memNE(RX_PRECOMP(re), t, len))
85aff577 186 {
07bc277f 187 const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
c737faaf 188 U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME;
d8f6592e
AL
189 if (re) {
190 ReREFCNT_dec(re);
14a49a24
NC
191#ifdef USE_ITHREADS
192 PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
193#else
4608196e 194 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
14a49a24 195#endif
1e2e3d02
YO
196 } else if (PL_curcop->cop_hints_hash) {
197 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
198 "regcomp", 7, 0, 0);
199 if (ptr && SvIOK(ptr) && SvIV(ptr))
200 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 201 }
664e119d 202
533c011a 203 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 204 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 205
b9ad30b4
NC
206 if (DO_UTF8(tmpstr)) {
207 assert (SvUTF8(tmpstr));
208 } else if (SvUTF8(tmpstr)) {
209 /* Not doing UTF-8, despite what the SV says. Is this only if
210 we're trapped in use 'bytes'? */
211 /* Make a copy of the octet sequence, but without the flag on,
212 as the compiler now honours the SvUTF8 flag on tmpstr. */
213 STRLEN len;
214 const char *const p = SvPV(tmpstr, len);
215 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
216 }
c737faaf 217
3ab4a224
AB
218 if (eng)
219 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
220 else
221 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 222
f86aaa29 223 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 224 inside tie/overload accessors. */
c277df42 225 }
4633a7c4 226 }
c737faaf
YO
227
228 re = PM_GETRE(pm);
a0d0e21e 229
72311751 230#ifndef INCOMPLETE_TAINTS
3280af22
NIS
231 if (PL_tainting) {
232 if (PL_tainted)
07bc277f 233 RX_EXTFLAGS(re) |= RXf_TAINTED;
72311751 234 else
07bc277f 235 RX_EXTFLAGS(re) &= ~RXf_TAINTED;
72311751
GS
236 }
237#endif
238
220fc49f 239 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 240 pm = PL_curpm;
a0d0e21e 241
c737faaf
YO
242
243#if !defined(USE_ITHREADS)
244 /* can't change the optree at runtime either */
245 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 246 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 247 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 248 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 249 }
c737faaf 250#endif
a0d0e21e
LW
251 RETURN;
252}
253
254PP(pp_substcont)
255{
97aff369 256 dVAR;
39644a26 257 dSP;
c09156bb 258 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
259 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
260 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
261 register char *s = cx->sb_s;
262 register char *m = cx->sb_m;
263 char *orig = cx->sb_orig;
901017d6 264 register REGEXP * const rx = cx->sb_rx;
c445ea15 265 SV *nsv = NULL;
988e6e7e
AE
266 REGEXP *old = PM_GETRE(pm);
267 if(old != rx) {
bfed75c6 268 if(old)
988e6e7e 269 ReREFCNT_dec(old);
d6106309 270 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
271 }
272
d9f97599 273 rxres_restore(&cx->sb_rxres, rx);
01b35787 274 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 275
a0d0e21e 276 if (cx->sb_iters++) {
a3b680e6 277 const I32 saviters = cx->sb_iters;
a0d0e21e 278 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 279 DIE(aTHX_ "Substitution loop");
a0d0e21e 280
48c036b1
GS
281 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
282 cx->sb_rxtainted |= 2;
a0d0e21e 283 sv_catsv(dstr, POPs);
2c296965
YO
284 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
285 s -= RX_GOFS(rx);
a0d0e21e
LW
286
287 /* Are we done */
2c296965
YO
288 if (CxONCE(cx) || s < orig ||
289 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
290 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
291 ((cx->sb_rflags & REXEC_COPY_STR)
292 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
293 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 294 {
823a54a3 295 SV * const targ = cx->sb_targ;
748a9306 296
078c425b
JH
297 assert(cx->sb_strend >= s);
298 if(cx->sb_strend > s) {
299 if (DO_UTF8(dstr) && !SvUTF8(targ))
300 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
301 else
302 sv_catpvn(dstr, s, cx->sb_strend - s);
303 }
48c036b1 304 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 305
f8c7b90f 306#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
307 if (SvIsCOW(targ)) {
308 sv_force_normal_flags(targ, SV_COW_DROP_PV);
309 } else
310#endif
311 {
8bd4d4c5 312 SvPV_free(targ);
ed252734 313 }
f880fe2f 314 SvPV_set(targ, SvPVX(dstr));
748a9306
LW
315 SvCUR_set(targ, SvCUR(dstr));
316 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH
317 if (DO_UTF8(dstr))
318 SvUTF8_on(targ);
6136c704 319 SvPV_set(dstr, NULL);
48c036b1
GS
320
321 TAINT_IF(cx->sb_rxtainted & 1);
6e449a3a 322 mPUSHi(saviters - 1);
48c036b1 323
ffc61ed2 324 (void)SvPOK_only_UTF8(targ);
48c036b1 325 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 326 SvSETMAGIC(targ);
9212bbba 327 SvTAINT(targ);
5cd24f17 328
4633a7c4 329 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
330 POPSUBST(cx);
331 RETURNOP(pm->op_next);
332 }
8e5e9ebe 333 cx->sb_iters = saviters;
a0d0e21e 334 }
07bc277f 335 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
336 m = s;
337 s = orig;
07bc277f 338 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
339 s = orig + (m - s);
340 cx->sb_strend = s + (cx->sb_strend - m);
341 }
07bc277f 342 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 343 if (m > s) {
bfed75c6 344 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
345 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
346 else
347 sv_catpvn(dstr, s, m-s);
348 }
07bc277f 349 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 350 { /* Update the pos() information. */
44f8325f 351 SV * const sv = cx->sb_targ;
084916e3 352 MAGIC *mg;
7a7f3e45 353 SvUPGRADE(sv, SVt_PVMG);
14befaf4 354 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 355#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 356 if (SvIsCOW(sv))
d83f0a82
NC
357 sv_force_normal_flags(sv, 0);
358#endif
359 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
360 NULL, 0);
084916e3 361 }
ce474962 362 mg->mg_len = m - orig;
084916e3 363 }
988e6e7e 364 if (old != rx)
d6106309 365 (void)ReREFCNT_inc(rx);
d9f97599
GS
366 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
367 rxres_save(&cx->sb_rxres, rx);
29f2e912 368 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
369}
370
c90c0ff4 371void
864dbfa3 372Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
373{
374 UV *p = (UV*)*rsp;
375 U32 i;
7918f24d
NC
376
377 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 378 PERL_UNUSED_CONTEXT;
c90c0ff4 379
07bc277f 380 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 381#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 382 i = 7 + RX_NPARENS(rx) * 2;
ed252734 383#else
07bc277f 384 i = 6 + RX_NPARENS(rx) * 2;
ed252734 385#endif
c90c0ff4 386 if (!p)
a02a5408 387 Newx(p, i, UV);
c90c0ff4
PP
388 else
389 Renew(p, i, UV);
390 *rsp = (void*)p;
391 }
392
07bc277f 393 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 394 RX_MATCH_COPIED_off(rx);
c90c0ff4 395
f8c7b90f 396#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
397 *p++ = PTR2UV(RX_SAVED_COPY(rx));
398 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
399#endif
400
07bc277f 401 *p++ = RX_NPARENS(rx);
c90c0ff4 402
07bc277f
NC
403 *p++ = PTR2UV(RX_SUBBEG(rx));
404 *p++ = (UV)RX_SUBLEN(rx);
405 for (i = 0; i <= RX_NPARENS(rx); ++i) {
406 *p++ = (UV)RX_OFFS(rx)[i].start;
407 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
408 }
409}
410
9c105995
NC
411static void
412S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
413{
414 UV *p = (UV*)*rsp;
415 U32 i;
7918f24d
NC
416
417 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 418 PERL_UNUSED_CONTEXT;
c90c0ff4 419
ed252734 420 RX_MATCH_COPY_FREE(rx);
cf93c79d 421 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
422 *p++ = 0;
423
f8c7b90f 424#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
425 if (RX_SAVED_COPY(rx))
426 SvREFCNT_dec (RX_SAVED_COPY(rx));
427 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
428 *p++ = 0;
429#endif
430
07bc277f 431 RX_NPARENS(rx) = *p++;
c90c0ff4 432
07bc277f
NC
433 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
434 RX_SUBLEN(rx) = (I32)(*p++);
435 for (i = 0; i <= RX_NPARENS(rx); ++i) {
436 RX_OFFS(rx)[i].start = (I32)(*p++);
437 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
438 }
439}
440
9c105995
NC
441static void
442S_rxres_free(pTHX_ void **rsp)
c90c0ff4 443{
44f8325f 444 UV * const p = (UV*)*rsp;
7918f24d
NC
445
446 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 447 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
448
449 if (p) {
94010e71
NC
450#ifdef PERL_POISON
451 void *tmp = INT2PTR(char*,*p);
452 Safefree(tmp);
453 if (*p)
7e337ee0 454 PoisonFree(*p, 1, sizeof(*p));
94010e71 455#else
56431972 456 Safefree(INT2PTR(char*,*p));
94010e71 457#endif
f8c7b90f 458#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
459 if (p[1]) {
460 SvREFCNT_dec (INT2PTR(SV*,p[1]));
461 }
462#endif
c90c0ff4 463 Safefree(p);
4608196e 464 *rsp = NULL;
c90c0ff4
PP
465 }
466}
467
a0d0e21e
LW
468PP(pp_formline)
469{
97aff369 470 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 471 register SV * const tmpForm = *++MARK;
dea28490 472 register U32 *fpc;
a0d0e21e 473 register char *t;
245d4a47 474 const char *f;
a0d0e21e 475 register I32 arg;
c445ea15
AL
476 register SV *sv = NULL;
477 const char *item = NULL;
9c5ffd7c
JH
478 I32 itemsize = 0;
479 I32 fieldsize = 0;
a0d0e21e 480 I32 lines = 0;
c445ea15
AL
481 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
482 const char *chophere = NULL;
483 char *linemark = NULL;
65202027 484 NV value;
9c5ffd7c 485 bool gotsome = FALSE;
a0d0e21e 486 STRLEN len;
823a54a3 487 const STRLEN fudge = SvPOK(tmpForm)
24c89738 488 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
489 bool item_is_utf8 = FALSE;
490 bool targ_is_utf8 = FALSE;
c445ea15 491 SV * nsv = NULL;
cbbf8932 492 OP * parseres = NULL;
bfed75c6 493 const char *fmt;
a0d0e21e 494
76e3520e 495 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
496 if (SvREADONLY(tmpForm)) {
497 SvREADONLY_off(tmpForm);
a1b95068 498 parseres = doparseform(tmpForm);
445b3f51
GS
499 SvREADONLY_on(tmpForm);
500 }
501 else
a1b95068
LW
502 parseres = doparseform(tmpForm);
503 if (parseres)
504 return parseres;
a0d0e21e 505 }
3280af22 506 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
507 if (DO_UTF8(PL_formtarget))
508 targ_is_utf8 = TRUE;
a0ed51b3 509 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 510 t += len;
245d4a47 511 f = SvPV_const(tmpForm, len);
a0d0e21e 512 /* need to jump to the next word */
245d4a47 513 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
514
515 for (;;) {
516 DEBUG_f( {
bfed75c6 517 const char *name = "???";
a0d0e21e
LW
518 arg = -1;
519 switch (*fpc) {
520 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
521 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
522 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
523 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
524 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
525
526 case FF_CHECKNL: name = "CHECKNL"; break;
527 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
528 case FF_SPACE: name = "SPACE"; break;
529 case FF_HALFSPACE: name = "HALFSPACE"; break;
530 case FF_ITEM: name = "ITEM"; break;
531 case FF_CHOP: name = "CHOP"; break;
532 case FF_LINEGLOB: name = "LINEGLOB"; break;
533 case FF_NEWLINE: name = "NEWLINE"; break;
534 case FF_MORE: name = "MORE"; break;
535 case FF_LINEMARK: name = "LINEMARK"; break;
536 case FF_END: name = "END"; break;
bfed75c6 537 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 538 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
539 }
540 if (arg >= 0)
bf49b057 541 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 542 else
bf49b057 543 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 544 } );
a0d0e21e
LW
545 switch (*fpc++) {
546 case FF_LINEMARK:
547 linemark = t;
a0d0e21e
LW
548 lines++;
549 gotsome = FALSE;
550 break;
551
552 case FF_LITERAL:
553 arg = *fpc++;
1bd51a4c 554 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 555 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
556 *t = '\0';
557 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
558 t = SvEND(PL_formtarget);
f3f2f1a3 559 f += arg;
1bd51a4c
IH
560 break;
561 }
562 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 563 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c 564 *t = '\0';
7bf79863 565 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC, fudge + 1);
1bd51a4c
IH
566 t = SvEND(PL_formtarget);
567 targ_is_utf8 = TRUE;
568 }
a0d0e21e
LW
569 while (arg--)
570 *t++ = *f++;
571 break;
572
573 case FF_SKIP:
574 f += *fpc++;
575 break;
576
577 case FF_FETCH:
578 arg = *fpc++;
579 f += arg;
580 fieldsize = arg;
581
582 if (MARK < SP)
583 sv = *++MARK;
584 else {
3280af22 585 sv = &PL_sv_no;
a2a5de95 586 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
587 }
588 break;
589
590 case FF_CHECKNL:
5a34cab7
NC
591 {
592 const char *send;
593 const char *s = item = SvPV_const(sv, len);
594 itemsize = len;
595 if (DO_UTF8(sv)) {
596 itemsize = sv_len_utf8(sv);
597 if (itemsize != (I32)len) {
598 I32 itembytes;
599 if (itemsize > fieldsize) {
600 itemsize = fieldsize;
601 itembytes = itemsize;
602 sv_pos_u2b(sv, &itembytes, 0);
603 }
604 else
605 itembytes = len;
606 send = chophere = s + itembytes;
607 while (s < send) {
608 if (*s & ~31)
609 gotsome = TRUE;
610 else if (*s == '\n')
611 break;
612 s++;
613 }
614 item_is_utf8 = TRUE;
615 itemsize = s - item;
616 sv_pos_b2u(sv, &itemsize);
617 break;
a0ed51b3 618 }
a0ed51b3 619 }
5a34cab7
NC
620 item_is_utf8 = FALSE;
621 if (itemsize > fieldsize)
622 itemsize = fieldsize;
623 send = chophere = s + itemsize;
624 while (s < send) {
625 if (*s & ~31)
626 gotsome = TRUE;
627 else if (*s == '\n')
628 break;
629 s++;
630 }
631 itemsize = s - item;
632 break;
a0ed51b3 633 }
a0d0e21e
LW
634
635 case FF_CHECKCHOP:
5a34cab7
NC
636 {
637 const char *s = item = SvPV_const(sv, len);
638 itemsize = len;
639 if (DO_UTF8(sv)) {
640 itemsize = sv_len_utf8(sv);
641 if (itemsize != (I32)len) {
642 I32 itembytes;
643 if (itemsize <= fieldsize) {
644 const char *send = chophere = s + itemsize;
645 while (s < send) {
646 if (*s == '\r') {
647 itemsize = s - item;
a0ed51b3 648 chophere = s;
a0ed51b3 649 break;
5a34cab7
NC
650 }
651 if (*s++ & ~31)
a0ed51b3 652 gotsome = TRUE;
a0ed51b3 653 }
a0ed51b3 654 }
5a34cab7
NC
655 else {
656 const char *send;
657 itemsize = fieldsize;
658 itembytes = itemsize;
659 sv_pos_u2b(sv, &itembytes, 0);
660 send = chophere = s + itembytes;
661 while (s < send || (s == send && isSPACE(*s))) {
662 if (isSPACE(*s)) {
663 if (chopspace)
664 chophere = s;
665 if (*s == '\r')
666 break;
667 }
668 else {
669 if (*s & ~31)
670 gotsome = TRUE;
671 if (strchr(PL_chopset, *s))
672 chophere = s + 1;
673 }
674 s++;
675 }
676 itemsize = chophere - item;
677 sv_pos_b2u(sv, &itemsize);
678 }
679 item_is_utf8 = TRUE;
a0d0e21e
LW
680 break;
681 }
a0d0e21e 682 }
5a34cab7
NC
683 item_is_utf8 = FALSE;
684 if (itemsize <= fieldsize) {
685 const char *const send = chophere = s + itemsize;
686 while (s < send) {
687 if (*s == '\r') {
688 itemsize = s - item;
a0d0e21e 689 chophere = s;
a0d0e21e 690 break;
5a34cab7
NC
691 }
692 if (*s++ & ~31)
a0d0e21e 693 gotsome = TRUE;
a0d0e21e 694 }
a0d0e21e 695 }
5a34cab7
NC
696 else {
697 const char *send;
698 itemsize = fieldsize;
699 send = chophere = s + itemsize;
700 while (s < send || (s == send && isSPACE(*s))) {
701 if (isSPACE(*s)) {
702 if (chopspace)
703 chophere = s;
704 if (*s == '\r')
705 break;
706 }
707 else {
708 if (*s & ~31)
709 gotsome = TRUE;
710 if (strchr(PL_chopset, *s))
711 chophere = s + 1;
712 }
713 s++;
714 }
715 itemsize = chophere - item;
716 }
717 break;
a0d0e21e 718 }
a0d0e21e
LW
719
720 case FF_SPACE:
721 arg = fieldsize - itemsize;
722 if (arg) {
723 fieldsize -= arg;
724 while (arg-- > 0)
725 *t++ = ' ';
726 }
727 break;
728
729 case FF_HALFSPACE:
730 arg = fieldsize - itemsize;
731 if (arg) {
732 arg /= 2;
733 fieldsize -= arg;
734 while (arg-- > 0)
735 *t++ = ' ';
736 }
737 break;
738
739 case FF_ITEM:
5a34cab7
NC
740 {
741 const char *s = item;
742 arg = itemsize;
743 if (item_is_utf8) {
744 if (!targ_is_utf8) {
745 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
746 *t = '\0';
7bf79863
KW
747 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC,
748 fudge + 1);
5a34cab7
NC
749 t = SvEND(PL_formtarget);
750 targ_is_utf8 = TRUE;
a0ed51b3 751 }
5a34cab7
NC
752 while (arg--) {
753 if (UTF8_IS_CONTINUED(*s)) {
754 STRLEN skip = UTF8SKIP(s);
755 switch (skip) {
756 default:
757 Move(s,t,skip,char);
758 s += skip;
759 t += skip;
760 break;
761 case 7: *t++ = *s++;
762 case 6: *t++ = *s++;
763 case 5: *t++ = *s++;
764 case 4: *t++ = *s++;
765 case 3: *t++ = *s++;
766 case 2: *t++ = *s++;
767 case 1: *t++ = *s++;
768 }
769 }
770 else {
771 if ( !((*t++ = *s++) & ~31) )
772 t[-1] = ' ';
773 }
a0ed51b3 774 }
5a34cab7 775 break;
a0ed51b3 776 }
5a34cab7
NC
777 if (targ_is_utf8 && !item_is_utf8) {
778 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
779 *t = '\0';
780 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
781 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 782#ifdef EBCDIC
901017d6 783 const int ch = *t;
5a34cab7 784 if (iscntrl(ch))
78da4d13 785#else
5a34cab7 786 if (!(*t & ~31))
78da4d13 787#endif
5a34cab7
NC
788 *t = ' ';
789 }
790 break;
78da4d13 791 }
5a34cab7 792 while (arg--) {
9d116dd7 793#ifdef EBCDIC
901017d6 794 const int ch = *t++ = *s++;
5a34cab7 795 if (iscntrl(ch))
a0d0e21e 796#else
5a34cab7 797 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 798#endif
5a34cab7
NC
799 t[-1] = ' ';
800 }
801 break;
a0d0e21e 802 }
a0d0e21e
LW
803
804 case FF_CHOP:
5a34cab7
NC
805 {
806 const char *s = chophere;
807 if (chopspace) {
af68e756 808 while (isSPACE(*s))
5a34cab7
NC
809 s++;
810 }
811 sv_chop(sv,s);
812 SvSETMAGIC(sv);
813 break;
a0d0e21e 814 }
a0d0e21e 815
a1b95068
LW
816 case FF_LINESNGL:
817 chopspace = 0;
a0d0e21e 818 case FF_LINEGLOB:
5a34cab7 819 {
e32383e2 820 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 821 const char *s = item = SvPV_const(sv, len);
f3f2f1a3 822 item_is_utf8 = DO_UTF8(sv);
5a34cab7 823 itemsize = len;
5a34cab7 824 if (itemsize) {
e8e72d41 825 STRLEN to_copy = itemsize;
5a34cab7 826 const char *const send = s + len;
35c6393c 827 const U8 *source = (const U8 *) s;
e8e72d41
NC
828 U8 *tmp = NULL;
829
5a34cab7
NC
830 gotsome = TRUE;
831 chophere = s + itemsize;
832 while (s < send) {
833 if (*s++ == '\n') {
834 if (oneline) {
e8e72d41 835 to_copy = s - SvPVX_const(sv) - 1;
5a34cab7
NC
836 chophere = s;
837 break;
838 } else {
839 if (s == send) {
840 itemsize--;
e8e72d41 841 to_copy--;
5a34cab7
NC
842 } else
843 lines++;
844 }
1bd51a4c 845 }
a0d0e21e 846 }
e8e72d41 847 if (targ_is_utf8 && !item_is_utf8) {
35c6393c 848 source = tmp = bytes_to_utf8(source, &to_copy);
e8e72d41
NC
849 SvCUR_set(PL_formtarget,
850 t - SvPVX_const(PL_formtarget));
851 } else {
852 if (item_is_utf8 && !targ_is_utf8) {
853 /* Upgrade targ to UTF8, and then we reduce it to
854 a problem we have a simple solution for. */
855 SvCUR_set(PL_formtarget,
856 t - SvPVX_const(PL_formtarget));
857 targ_is_utf8 = TRUE;
858 /* Don't need get magic. */
7bf79863 859 sv_utf8_upgrade_nomg(PL_formtarget);
e8e72d41
NC
860 } else {
861 SvCUR_set(PL_formtarget,
862 t - SvPVX_const(PL_formtarget));
863 }
e8e72d41
NC
864
865 /* Easy. They agree. */
866 assert (item_is_utf8 == targ_is_utf8);
867 }
868 SvGROW(PL_formtarget,
869 SvCUR(PL_formtarget) + to_copy + fudge + 1);
5a34cab7 870 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
e8e72d41
NC
871
872 Copy(source, t, to_copy, char);
873 t += to_copy;
874 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
f3f2f1a3 875 if (item_is_utf8) {
e8e72d41
NC
876 if (SvGMAGICAL(sv)) {
877 /* Mustn't call sv_pos_b2u() as it does a second
878 mg_get(). Is this a bug? Do we need a _flags()
879 variant? */
880 itemsize = utf8_length(source, source + itemsize);
881 } else {
882 sv_pos_b2u(sv, &itemsize);
883 }
884 assert(!tmp);
885 } else if (tmp) {
886 Safefree(tmp);
f3f2f1a3 887 }
a0d0e21e 888 }
5a34cab7 889 break;
a0d0e21e 890 }
a0d0e21e 891
a1b95068
LW
892 case FF_0DECIMAL:
893 arg = *fpc++;
894#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
895 fmt = (const char *)
896 ((arg & 256) ?
897 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 898#else
10edeb5d
JH
899 fmt = (const char *)
900 ((arg & 256) ?
901 "%#0*.*f" : "%0*.*f");
a1b95068
LW
902#endif
903 goto ff_dec;
a0d0e21e 904 case FF_DECIMAL:
a0d0e21e 905 arg = *fpc++;
65202027 906#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
907 fmt = (const char *)
908 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 909#else
10edeb5d
JH
910 fmt = (const char *)
911 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 912#endif
a1b95068 913 ff_dec:
784707d5
JP
914 /* If the field is marked with ^ and the value is undefined,
915 blank it out. */
784707d5
JP
916 if ((arg & 512) && !SvOK(sv)) {
917 arg = fieldsize;
918 while (arg--)
919 *t++ = ' ';
920 break;
921 }
922 gotsome = TRUE;
923 value = SvNV(sv);
a1b95068 924 /* overflow evidence */
bfed75c6 925 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
926 arg = fieldsize;
927 while (arg--)
928 *t++ = '#';
929 break;
930 }
784707d5
JP
931 /* Formats aren't yet marked for locales, so assume "yes". */
932 {
933 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 934 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
935 RESTORE_NUMERIC_STANDARD();
936 }
937 t += fieldsize;
938 break;
a1b95068 939
a0d0e21e
LW
940 case FF_NEWLINE:
941 f++;
942 while (t-- > linemark && *t == ' ') ;
943 t++;
944 *t++ = '\n';
945 break;
946
947 case FF_BLANK:
948 arg = *fpc++;
949 if (gotsome) {
950 if (arg) { /* repeat until fields exhausted? */
951 *t = '\0';
b15aece3 952 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 953 lines += FmLINES(PL_formtarget);
1bd51a4c
IH
954 if (targ_is_utf8)
955 SvUTF8_on(PL_formtarget);
3280af22 956 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
957 SP = ORIGMARK;
958 RETURNOP(cLISTOP->op_first);
959 }
960 }
961 else {
962 t = linemark;
963 lines--;
964 }
965 break;
966
967 case FF_MORE:
5a34cab7
NC
968 {
969 const char *s = chophere;
970 const char *send = item + len;
971 if (chopspace) {
af68e756 972 while (isSPACE(*s) && (s < send))
5a34cab7 973 s++;
a0d0e21e 974 }
5a34cab7
NC
975 if (s < send) {
976 char *s1;
977 arg = fieldsize - itemsize;
978 if (arg) {
979 fieldsize -= arg;
980 while (arg-- > 0)
981 *t++ = ' ';
982 }
983 s1 = t - 3;
984 if (strnEQ(s1," ",3)) {
985 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
986 s1--;
987 }
988 *s1++ = '.';
989 *s1++ = '.';
990 *s1++ = '.';
a0d0e21e 991 }
5a34cab7 992 break;
a0d0e21e 993 }
a0d0e21e
LW
994 case FF_END:
995 *t = '\0';
b15aece3 996 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
997 if (targ_is_utf8)
998 SvUTF8_on(PL_formtarget);
3280af22 999 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
1000 SP = ORIGMARK;
1001 RETPUSHYES;
1002 }
1003 }
1004}
1005
1006PP(pp_grepstart)
1007{
27da23d5 1008 dVAR; dSP;
a0d0e21e
LW
1009 SV *src;
1010
3280af22 1011 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 1012 (void)POPMARK;
54310121 1013 if (GIMME_V == G_SCALAR)
6e449a3a 1014 mXPUSHi(0);
533c011a 1015 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 1016 }
3280af22 1017 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
1018 pp_pushmark(); /* push dst */
1019 pp_pushmark(); /* push src */
d343c3ef 1020 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW
1021
1022 SAVETMPS;
59f00321
RGS
1023 if (PL_op->op_private & OPpGREP_LEX)
1024 SAVESPTR(PAD_SVl(PL_op->op_targ));
1025 else
1026 SAVE_DEFSV;
d343c3ef 1027 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1028 SAVEVPTR(PL_curpm);
a0d0e21e 1029
3280af22 1030 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 1031 SvTEMP_off(src);
59f00321
RGS
1032 if (PL_op->op_private & OPpGREP_LEX)
1033 PAD_SVl(PL_op->op_targ) = src;
1034 else
414bf5ae 1035 DEFSV_set(src);
a0d0e21e
LW
1036
1037 PUTBACK;
533c011a 1038 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 1039 pp_pushmark(); /* push top */
533c011a 1040 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
1041}
1042
a0d0e21e
LW
1043PP(pp_mapwhile)
1044{
27da23d5 1045 dVAR; dSP;
f54cb97a 1046 const I32 gimme = GIMME_V;
544f3153 1047 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
1048 I32 count;
1049 I32 shift;
1050 SV** src;
ac27b0f5 1051 SV** dst;
a0d0e21e 1052
544f3153 1053 /* first, move source pointer to the next item in the source list */
3280af22 1054 ++PL_markstack_ptr[-1];
544f3153
GS
1055
1056 /* if there are new items, push them into the destination list */
4c90a460 1057 if (items && gimme != G_VOID) {
544f3153
GS
1058 /* might need to make room back there first */
1059 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1060 /* XXX this implementation is very pessimal because the stack
1061 * is repeatedly extended for every set of items. Is possible
1062 * to do this without any stack extension or copying at all
1063 * by maintaining a separate list over which the map iterates
18ef8bea 1064 * (like foreach does). --gsar */
544f3153
GS
1065
1066 /* everything in the stack after the destination list moves
1067 * towards the end the stack by the amount of room needed */
1068 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1069
1070 /* items to shift up (accounting for the moved source pointer) */
1071 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
1072
1073 /* This optimization is by Ben Tilly and it does
1074 * things differently from what Sarathy (gsar)
1075 * is describing. The downside of this optimization is
1076 * that leaves "holes" (uninitialized and hopefully unused areas)
1077 * to the Perl stack, but on the other hand this
1078 * shouldn't be a problem. If Sarathy's idea gets
1079 * implemented, this optimization should become
1080 * irrelevant. --jhi */
1081 if (shift < count)
1082 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1083
924508f0
GS
1084 EXTEND(SP,shift);
1085 src = SP;
1086 dst = (SP += shift);
3280af22
NIS
1087 PL_markstack_ptr[-1] += shift;
1088 *PL_markstack_ptr += shift;
544f3153 1089 while (count--)
a0d0e21e
LW
1090 *dst-- = *src--;
1091 }
544f3153 1092 /* copy the new items down to the destination list */
ac27b0f5 1093 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
1094 if (gimme == G_ARRAY) {
1095 while (items-- > 0)
1096 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1097 }
bfed75c6 1098 else {
22023b26
TP
1099 /* scalar context: we don't care about which values map returns
1100 * (we use undef here). And so we certainly don't want to do mortal
1101 * copies of meaningless values. */
1102 while (items-- > 0) {
b988aa42 1103 (void)POPs;
22023b26
TP
1104 *dst-- = &PL_sv_undef;
1105 }
1106 }
a0d0e21e 1107 }
d343c3ef 1108 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW
1109
1110 /* All done yet? */
3280af22 1111 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1112
1113 (void)POPMARK; /* pop top */
d343c3ef 1114 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1115 (void)POPMARK; /* pop src */
3280af22 1116 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1117 (void)POPMARK; /* pop dst */
3280af22 1118 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1119 if (gimme == G_SCALAR) {
7cc47870
RGS
1120 if (PL_op->op_private & OPpGREP_LEX) {
1121 SV* sv = sv_newmortal();
1122 sv_setiv(sv, items);
1123 PUSHs(sv);
1124 }
1125 else {
1126 dTARGET;
1127 XPUSHi(items);
1128 }
a0d0e21e 1129 }
54310121
PP
1130 else if (gimme == G_ARRAY)
1131 SP += items;
a0d0e21e
LW
1132 RETURN;
1133 }
1134 else {
1135 SV *src;
1136
d343c3ef 1137 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1138 SAVEVPTR(PL_curpm);
a0d0e21e 1139
544f3153 1140 /* set $_ to the new source item */
3280af22 1141 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1142 SvTEMP_off(src);
59f00321
RGS
1143 if (PL_op->op_private & OPpGREP_LEX)
1144 PAD_SVl(PL_op->op_targ) = src;
1145 else
414bf5ae 1146 DEFSV_set(src);
a0d0e21e
LW
1147
1148 RETURNOP(cLOGOP->op_other);
1149 }
1150}
1151
a0d0e21e
LW
1152/* Range stuff. */
1153
1154PP(pp_range)
1155{
97aff369 1156 dVAR;
a0d0e21e 1157 if (GIMME == G_ARRAY)
1a67a97c 1158 return NORMAL;
538573f7 1159 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1160 return cLOGOP->op_other;
538573f7 1161 else
1a67a97c 1162 return NORMAL;
a0d0e21e
LW
1163}
1164
1165PP(pp_flip)
1166{
97aff369 1167 dVAR;
39644a26 1168 dSP;
a0d0e21e
LW
1169
1170 if (GIMME == G_ARRAY) {
1a67a97c 1171 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1172 }
1173 else {
1174 dTOPss;
44f8325f 1175 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1176 int flip = 0;
790090df 1177
bfed75c6 1178 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1179 if (GvIO(PL_last_in_gv)) {
1180 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1181 }
1182 else {
fafc274c 1183 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1184 if (gv && GvSV(gv))
1185 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1186 }
bfed75c6
AL
1187 } else {
1188 flip = SvTRUE(sv);
1189 }
1190 if (flip) {
a0d0e21e 1191 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1192 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1193 sv_setiv(targ, 1);
3e3baf6d 1194 SETs(targ);
a0d0e21e
LW
1195 RETURN;
1196 }
1197 else {
1198 sv_setiv(targ, 0);
924508f0 1199 SP--;
1a67a97c 1200 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1201 }
1202 }
76f68e9b 1203 sv_setpvs(TARG, "");
a0d0e21e
LW
1204 SETs(targ);
1205 RETURN;
1206 }
1207}
1208
8e9bbdb9
RGS
1209/* This code tries to decide if "$left .. $right" should use the
1210 magical string increment, or if the range is numeric (we make
1211 an exception for .."0" [#18165]). AMS 20021031. */
1212
1213#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1214 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1215 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1216 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1217 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1218 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1219
a0d0e21e
LW
1220PP(pp_flop)
1221{
97aff369 1222 dVAR; dSP;
a0d0e21e
LW
1223
1224 if (GIMME == G_ARRAY) {
1225 dPOPPOPssrl;
86cb7173 1226
5b295bef
RD
1227 SvGETMAGIC(left);
1228 SvGETMAGIC(right);
a0d0e21e 1229
8e9bbdb9 1230 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1231 register IV i, j;
1232 IV max;
4fe3f0fa
MHM
1233 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1234 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1235 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1236 i = SvIV(left);
1237 max = SvIV(right);
bbce6d69 1238 if (max >= i) {
c1ab3db2
AK
1239 j = max - i + 1;
1240 EXTEND_MORTAL(j);
1241 EXTEND(SP, j);
bbce6d69 1242 }
c1ab3db2
AK
1243 else
1244 j = 0;
1245 while (j--) {
901017d6 1246 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1247 PUSHs(sv);
1248 }
1249 }
1250 else {
44f8325f 1251 SV * const final = sv_mortalcopy(right);
13c5b33c 1252 STRLEN len;
823a54a3 1253 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1254
901017d6 1255 SV *sv = sv_mortalcopy(left);
13c5b33c 1256 SvPV_force_nolen(sv);
89ea2908 1257 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1258 XPUSHs(sv);
b15aece3 1259 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1260 break;
a0d0e21e
LW
1261 sv = sv_2mortal(newSVsv(sv));
1262 sv_inc(sv);
1263 }
a0d0e21e
LW
1264 }
1265 }
1266 else {
1267 dTOPss;
901017d6 1268 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1269 int flop = 0;
a0d0e21e 1270 sv_inc(targ);
4e3399f9
YST
1271
1272 if (PL_op->op_private & OPpFLIP_LINENUM) {
1273 if (GvIO(PL_last_in_gv)) {
1274 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1275 }
1276 else {
fafc274c 1277 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1278 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1279 }
1280 }
1281 else {
1282 flop = SvTRUE(sv);
1283 }
1284
1285 if (flop) {
a0d0e21e 1286 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1287 sv_catpvs(targ, "E0");
a0d0e21e
LW
1288 }
1289 SETs(targ);
1290 }
1291
1292 RETURN;
1293}
1294
1295/* Control. */
1296
27da23d5 1297static const char * const context_name[] = {
515afda2 1298 "pseudo-block",
f31522f3 1299 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1300 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1301 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1302 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1303 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1304 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1305 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1306 "subroutine",
76753e7f 1307 "format",
515afda2 1308 "eval",
515afda2 1309 "substitution",
515afda2
NC
1310};
1311
76e3520e 1312STATIC I32
06b5626a 1313S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1314{
97aff369 1315 dVAR;
a0d0e21e 1316 register I32 i;
a0d0e21e 1317
7918f24d
NC
1318 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1319
a0d0e21e 1320 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1321 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1322 switch (CxTYPE(cx)) {
a0d0e21e 1323 case CXt_SUBST:
a0d0e21e 1324 case CXt_SUB:
7766f137 1325 case CXt_FORMAT:
a0d0e21e 1326 case CXt_EVAL:
0a753a76 1327 case CXt_NULL:
a2a5de95
NC
1328 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1329 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1330 if (CxTYPE(cx) == CXt_NULL)
1331 return -1;
1332 break;
c6fdafd0 1333 case CXt_LOOP_LAZYIV:
d01136d6 1334 case CXt_LOOP_LAZYSV:
3b719c58
NC
1335 case CXt_LOOP_FOR:
1336 case CXt_LOOP_PLAIN:
7e8f1eac
AD
1337 {
1338 const char *cx_label = CxLABEL(cx);
1339 if (!cx_label || strNE(label, cx_label) ) {
cea2e8a9 1340 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
7e8f1eac 1341 (long)i, cx_label));
a0d0e21e
LW
1342 continue;
1343 }
cea2e8a9 1344 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e 1345 return i;
7e8f1eac 1346 }
a0d0e21e
LW
1347 }
1348 }
1349 return i;
1350}
1351
0d863452
RH
1352
1353
e50aee73 1354I32
864dbfa3 1355Perl_dowantarray(pTHX)
e50aee73 1356{
97aff369 1357 dVAR;
f54cb97a 1358 const I32 gimme = block_gimme();
54310121
PP
1359 return (gimme == G_VOID) ? G_SCALAR : gimme;
1360}
1361
1362I32
864dbfa3 1363Perl_block_gimme(pTHX)
54310121 1364{
97aff369 1365 dVAR;
06b5626a 1366 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1367 if (cxix < 0)
46fc3d4c 1368 return G_VOID;
e50aee73 1369
54310121 1370 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1371 case G_VOID:
1372 return G_VOID;
54310121 1373 case G_SCALAR:
e50aee73 1374 return G_SCALAR;
54310121
PP
1375 case G_ARRAY:
1376 return G_ARRAY;
1377 default:
cea2e8a9 1378 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1379 /* NOTREACHED */
1380 return 0;
54310121 1381 }
e50aee73
AD
1382}
1383
78f9721b
SM
1384I32
1385Perl_is_lvalue_sub(pTHX)
1386{
97aff369 1387 dVAR;
06b5626a 1388 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1389 assert(cxix >= 0); /* We should only be called from inside subs */
1390
bafb2adc
NC
1391 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1392 return CxLVAL(cxstack + cxix);
78f9721b
SM
1393 else
1394 return 0;
1395}
1396
76e3520e 1397STATIC I32
901017d6 1398S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1399{
97aff369 1400 dVAR;
a0d0e21e 1401 I32 i;
7918f24d
NC
1402
1403 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1404
a0d0e21e 1405 for (i = startingblock; i >= 0; i--) {
901017d6 1406 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1407 switch (CxTYPE(cx)) {
a0d0e21e
LW
1408 default:
1409 continue;
1410 case CXt_EVAL:
1411 case CXt_SUB:
7766f137 1412 case CXt_FORMAT:
cea2e8a9 1413 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1414 return i;
1415 }
1416 }
1417 return i;
1418}
1419
76e3520e 1420STATIC I32
cea2e8a9 1421S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1422{
97aff369 1423 dVAR;
a0d0e21e 1424 I32 i;
a0d0e21e 1425 for (i = startingblock; i >= 0; i--) {
06b5626a 1426 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1427 switch (CxTYPE(cx)) {
a0d0e21e
LW
1428 default:
1429 continue;
1430 case CXt_EVAL:
cea2e8a9 1431 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1432 return i;
1433 }
1434 }
1435 return i;
1436}
1437
76e3520e 1438STATIC I32
cea2e8a9 1439S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1440{
97aff369 1441 dVAR;
a0d0e21e 1442 I32 i;
a0d0e21e 1443 for (i = startingblock; i >= 0; i--) {
901017d6 1444 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1445 switch (CxTYPE(cx)) {
a0d0e21e 1446 case CXt_SUBST:
a0d0e21e 1447 case CXt_SUB:
7766f137 1448 case CXt_FORMAT:
a0d0e21e 1449 case CXt_EVAL:
0a753a76 1450 case CXt_NULL:
a2a5de95
NC
1451 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1452 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1453 if ((CxTYPE(cx)) == CXt_NULL)
1454 return -1;
1455 break;
c6fdafd0 1456 case CXt_LOOP_LAZYIV:
d01136d6 1457 case CXt_LOOP_LAZYSV:
3b719c58
NC
1458 case CXt_LOOP_FOR:
1459 case CXt_LOOP_PLAIN:
cea2e8a9 1460 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1461 return i;
1462 }
1463 }
1464 return i;
1465}
1466
0d863452
RH
1467STATIC I32
1468S_dopoptogiven(pTHX_ I32 startingblock)
1469{
97aff369 1470 dVAR;
0d863452
RH
1471 I32 i;
1472 for (i = startingblock; i >= 0; i--) {
1473 register const PERL_CONTEXT *cx = &cxstack[i];
1474 switch (CxTYPE(cx)) {
1475 default:
1476 continue;
1477 case CXt_GIVEN:
1478 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1479 return i;
3b719c58
NC
1480 case CXt_LOOP_PLAIN:
1481 assert(!CxFOREACHDEF(cx));
1482 break;
c6fdafd0 1483 case CXt_LOOP_LAZYIV:
d01136d6 1484 case CXt_LOOP_LAZYSV:
3b719c58 1485 case CXt_LOOP_FOR:
0d863452
RH
1486 if (CxFOREACHDEF(cx)) {
1487 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1488 return i;
1489 }
1490 }
1491 }
1492 return i;
1493}
1494
1495STATIC I32
1496S_dopoptowhen(pTHX_ I32 startingblock)
1497{
97aff369 1498 dVAR;
0d863452
RH
1499 I32 i;
1500 for (i = startingblock; i >= 0; i--) {
1501 register const PERL_CONTEXT *cx = &cxstack[i];
1502 switch (CxTYPE(cx)) {
1503 default:
1504 continue;
1505 case CXt_WHEN:
1506 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1507 return i;
1508 }
1509 }
1510 return i;
1511}
1512
a0d0e21e 1513void
864dbfa3 1514Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1515{
97aff369 1516 dVAR;
a0d0e21e
LW
1517 I32 optype;
1518
1519 while (cxstack_ix > cxix) {
b0d9ce38 1520 SV *sv;
06b5626a 1521 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1522 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1523 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1524 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1525 switch (CxTYPE(cx)) {
c90c0ff4
PP
1526 case CXt_SUBST:
1527 POPSUBST(cx);
1528 continue; /* not break */
a0d0e21e 1529 case CXt_SUB:
b0d9ce38
GS
1530 POPSUB(cx,sv);
1531 LEAVESUB(sv);
a0d0e21e
LW
1532 break;
1533 case CXt_EVAL:
1534 POPEVAL(cx);
1535 break;
c6fdafd0 1536 case CXt_LOOP_LAZYIV:
d01136d6 1537 case CXt_LOOP_LAZYSV:
3b719c58
NC
1538 case CXt_LOOP_FOR:
1539 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1540 POPLOOP(cx);
1541 break;
0a753a76 1542 case CXt_NULL:
a0d0e21e 1543 break;
7766f137
GS
1544 case CXt_FORMAT:
1545 POPFORMAT(cx);
1546 break;
a0d0e21e 1547 }
c90c0ff4 1548 cxstack_ix--;
a0d0e21e 1549 }
1b6737cc 1550 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1551}
1552
5a844595
GS
1553void
1554Perl_qerror(pTHX_ SV *err)
1555{
97aff369 1556 dVAR;
7918f24d
NC
1557
1558 PERL_ARGS_ASSERT_QERROR;
1559
5a844595
GS
1560 if (PL_in_eval)
1561 sv_catsv(ERRSV, err);
1562 else if (PL_errors)
1563 sv_catsv(PL_errors, err);
1564 else
be2597df 1565 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1566 if (PL_parser)
1567 ++PL_parser->error_count;
5a844595
GS
1568}
1569
bb4c52e0 1570void
7d0994e0 1571Perl_die_where(pTHX_ SV *msv)
a0d0e21e 1572{
27da23d5 1573 dVAR;
87582a92 1574
3280af22 1575 if (PL_in_eval) {
a0d0e21e 1576 I32 cxix;
a0d0e21e 1577 I32 gimme;
a0d0e21e 1578
7d0994e0 1579 if (msv) {
faef0170 1580 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1581 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1582 SV * const err = ERRSV;
c445ea15 1583 const char *e = NULL;
98eae8f5 1584 if (!SvPOK(err))
76f68e9b 1585 sv_setpvs(err,"");
7d0994e0 1586 else if (SvCUR(err) >= sizeof(prefix)+SvCUR(msv)-1) {
0510663f 1587 STRLEN len;
7d0994e0
GG
1588 STRLEN msglen;
1589 const char* message = SvPV_const(msv, msglen);
349d4f2f 1590 e = SvPV_const(err, len);
0510663f 1591 e += len - msglen;
98eae8f5 1592 if (*e != *message || strNE(e,message))
c445ea15 1593 e = NULL;
98eae8f5
GS
1594 }
1595 if (!e) {
a2a5de95 1596 STRLEN start;
7d0994e0 1597 SvGROW(err, SvCUR(err)+sizeof(prefix)+SvCUR(msv));
98eae8f5 1598 sv_catpvn(err, prefix, sizeof(prefix)-1);
7d0994e0
GG
1599 sv_catsv(err, msv);
1600 start = SvCUR(err)-SvCUR(msv)-sizeof(prefix)+1;
a2a5de95
NC
1601 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "%s",
1602 SvPVX_const(err)+start);
4633a7c4 1603 }
4633a7c4 1604 }
1aa99e6b 1605 else {
7d0994e0
GG
1606 STRLEN msglen;
1607 const char* message = SvPV_const(msv, msglen);
06bf62c7 1608 sv_setpvn(ERRSV, message, msglen);
7d0994e0 1609 SvFLAGS(ERRSV) |= SvFLAGS(msv) & SVf_UTF8;
1aa99e6b 1610 }
4633a7c4 1611 }
4e6ea2c3 1612
5a844595
GS
1613 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1614 && PL_curstackinfo->si_prev)
1615 {
bac4b2ad 1616 dounwind(-1);
d3acc0f7 1617 POPSTACK;
bac4b2ad 1618 }
e336de0d 1619
a0d0e21e
LW
1620 if (cxix >= 0) {
1621 I32 optype;
35a4481c 1622 register PERL_CONTEXT *cx;
901017d6 1623 SV **newsp;
a0d0e21e
LW
1624
1625 if (cxix < cxstack_ix)
1626 dounwind(cxix);
1627
3280af22 1628 POPBLOCK(cx,PL_curpm);
6b35e009 1629 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0
GG
1630 STRLEN msglen;
1631 const char* message = SvPVx_const( msv ? msv : ERRSV, msglen);
10edeb5d 1632 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1633 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1634 my_exit(1);
1635 }
1636 POPEVAL(cx);
1637
1638 if (gimme == G_SCALAR)
3280af22
NIS
1639 *++newsp = &PL_sv_undef;
1640 PL_stack_sp = newsp;
a0d0e21e
LW
1641
1642 LEAVE;
748a9306 1643
7fb6a879
GS
1644 /* LEAVE could clobber PL_curcop (see save_re_context())
1645 * XXX it might be better to find a way to avoid messing with
1646 * PL_curcop in save_re_context() instead, but this is a more
1647 * minimal fix --GSAR */
1648 PL_curcop = cx->blk_oldcop;
1649
7a2e2cd6 1650 if (optype == OP_REQUIRE) {
44f8325f 1651 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1652 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1653 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1654 &PL_sv_undef, 0);
5a844595
GS
1655 DIE(aTHX_ "%sCompilation failed in require",
1656 *msg ? msg : "Unknown error\n");
7a2e2cd6 1657 }
f39bc417 1658 assert(CxTYPE(cx) == CXt_EVAL);
bb4c52e0
GG
1659 PL_restartop = cx->blk_eval.retop;
1660 JMPENV_JUMP(3);
1661 /* NOTREACHED */
a0d0e21e
LW
1662 }
1663 }
87582a92 1664
7d0994e0 1665 write_to_stderr( msv ? msv : ERRSV );
f86702cc
PP
1666 my_failure_exit();
1667 /* NOTREACHED */
a0d0e21e
LW
1668}
1669
1670PP(pp_xor)
1671{
97aff369 1672 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1673 if (SvTRUE(left) != SvTRUE(right))
1674 RETSETYES;
1675 else
1676 RETSETNO;
1677}
1678
a0d0e21e
LW
1679PP(pp_caller)
1680{
97aff369 1681 dVAR;
39644a26 1682 dSP;
a0d0e21e 1683 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1684 register const PERL_CONTEXT *cx;
1685 register const PERL_CONTEXT *ccstack = cxstack;
1686 const PERL_SI *top_si = PL_curstackinfo;
54310121 1687 I32 gimme;
06b5626a 1688 const char *stashname;
a0d0e21e
LW
1689 I32 count = 0;
1690
1691 if (MAXARG)
1692 count = POPi;
27d41816 1693
a0d0e21e 1694 for (;;) {
2c375eb9
GS
1695 /* we may be in a higher stacklevel, so dig down deeper */
1696 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1697 top_si = top_si->si_prev;
1698 ccstack = top_si->si_cxstack;
1699 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1700 }
a0d0e21e 1701 if (cxix < 0) {
27d41816
DM
1702 if (GIMME != G_ARRAY) {
1703 EXTEND(SP, 1);
a0d0e21e 1704 RETPUSHUNDEF;
27d41816 1705 }
a0d0e21e
LW
1706 RETURN;
1707 }
f2a7f298 1708 /* caller() should not report the automatic calls to &DB::sub */
1709 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1710 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1711 count++;
1712 if (!count--)
1713 break;
2c375eb9 1714 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1715 }
2c375eb9
GS
1716
1717 cx = &ccstack[cxix];
7766f137 1718 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1719 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1720 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1721 field below is defined for any cx. */
f2a7f298 1722 /* caller() should not report the automatic calls to &DB::sub */
1723 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1724 cx = &ccstack[dbcxix];
06a5b730
PP
1725 }
1726
ed094faf 1727 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1728 if (GIMME != G_ARRAY) {
27d41816 1729 EXTEND(SP, 1);
ed094faf 1730 if (!stashname)
3280af22 1731 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1732 else {
1733 dTARGET;
ed094faf 1734 sv_setpv(TARG, stashname);
49d8d3a1
MB
1735 PUSHs(TARG);
1736 }
a0d0e21e
LW
1737 RETURN;
1738 }
a0d0e21e 1739
b3ca2e83 1740 EXTEND(SP, 11);
27d41816 1741
ed094faf 1742 if (!stashname)
3280af22 1743 PUSHs(&PL_sv_undef);
49d8d3a1 1744 else
6e449a3a
MHM
1745 mPUSHs(newSVpv(stashname, 0));
1746 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1747 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW
1748 if (!MAXARG)
1749 RETURN;
7766f137 1750 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1751 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1752 /* So is ccstack[dbcxix]. */
07b8c804 1753 if (isGV(cvgv)) {
561b68a9 1754 SV * const sv = newSV(0);
c445ea15 1755 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1756 mPUSHs(sv);
bf38a478 1757 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1758 }
1759 else {
84bafc02 1760 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1761 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1762 }
a0d0e21e
LW
1763 }
1764 else {
84bafc02 1765 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1766 mPUSHi(0);
a0d0e21e 1767 }
54310121
PP
1768 gimme = (I32)cx->blk_gimme;
1769 if (gimme == G_VOID)
3280af22 1770 PUSHs(&PL_sv_undef);
54310121 1771 else
98625aca 1772 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1773 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1774 /* eval STRING */
85a64632 1775 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1776 PUSHs(cx->blk_eval.cur_text);
3280af22 1777 PUSHs(&PL_sv_no);
0f79a09d 1778 }
811a4de9 1779 /* require */
0f79a09d 1780 else if (cx->blk_eval.old_namesv) {
6e449a3a 1781 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1782 PUSHs(&PL_sv_yes);
06a5b730 1783 }
811a4de9
GS
1784 /* eval BLOCK (try blocks have old_namesv == 0) */
1785 else {
1786 PUSHs(&PL_sv_undef);
1787 PUSHs(&PL_sv_undef);
1788 }
4633a7c4 1789 }
a682de96
GS
1790 else {
1791 PUSHs(&PL_sv_undef);
1792 PUSHs(&PL_sv_undef);
1793 }
bafb2adc 1794 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1795 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1796 {
66a1b24b
AL
1797 AV * const ary = cx->blk_sub.argarray;
1798 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1799
3280af22 1800 if (!PL_dbargs) {
af3885a0
NC
1801 PL_dbargs = GvAV(gv_AVadd(gv_fetchpvs("DB::args", GV_ADDMULTI,
1802 SVt_PVAV)));
3ddcf04c 1803 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1804 }
1805
3280af22
NIS
1806 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1807 av_extend(PL_dbargs, AvFILLp(ary) + off);
1808 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1809 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1810 }
f3aa04c2
GS
1811 /* XXX only hints propagated via op_private are currently
1812 * visible (others are not easily accessible, since they
1813 * use the global PL_hints) */
6e449a3a 1814 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1815 {
1816 SV * mask ;
72dc9ed5 1817 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1818
ac27b0f5 1819 if (old_warnings == pWARN_NONE ||
114bafba 1820 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1821 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1822 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1823 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1824 /* Get the bit mask for $warnings::Bits{all}, because
1825 * it could have been extended by warnings::register */
1826 SV **bits_all;
6673a63c 1827 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1828 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1829 mask = newSVsv(*bits_all);
1830 }
1831 else {
1832 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1833 }
1834 }
e476b1b5 1835 else
72dc9ed5 1836 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1837 mPUSHs(mask);
e476b1b5 1838 }
b3ca2e83 1839
c28fe1ec 1840 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1841 sv_2mortal(newRV_noinc(
ad64d0ec
NC
1842 MUTABLE_SV(Perl_refcounted_he_chain_2hv(aTHX_
1843 cx->blk_oldcop->cop_hints_hash))))
b3ca2e83 1844 : &PL_sv_undef);
a0d0e21e
LW
1845 RETURN;
1846}
1847
a0d0e21e
LW
1848PP(pp_reset)
1849{
97aff369 1850 dVAR;
39644a26 1851 dSP;
10edeb5d 1852 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1853 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1854 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1855 RETURN;
1856}
1857
dd2155a4
DM
1858/* like pp_nextstate, but used instead when the debugger is active */
1859
a0d0e21e
LW
1860PP(pp_dbstate)
1861{
27da23d5 1862 dVAR;
533c011a 1863 PL_curcop = (COP*)PL_op;
a0d0e21e 1864 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1865 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1866 FREETMPS;
1867
5df8de69
DM
1868 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1869 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1870 {
39644a26 1871 dSP;
c09156bb 1872 register PERL_CONTEXT *cx;
f54cb97a 1873 const I32 gimme = G_ARRAY;
eb160463 1874 U8 hasargs;
0bd48802
AL
1875 GV * const gv = PL_DBgv;
1876 register CV * const cv = GvCV(gv);
a0d0e21e 1877
a0d0e21e 1878 if (!cv)
cea2e8a9 1879 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1880
aea4f609
DM
1881 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1882 /* don't do recursive DB::DB call */
a0d0e21e 1883 return NORMAL;
748a9306 1884
a57c6685 1885 ENTER;
4633a7c4
LW
1886 SAVETMPS;
1887
3280af22 1888 SAVEI32(PL_debug);
55497cff 1889 SAVESTACK_POS();
3280af22 1890 PL_debug = 0;
748a9306 1891 hasargs = 0;
924508f0 1892 SPAGAIN;
748a9306 1893
aed2304a 1894 if (CvISXSUB(cv)) {
c127bd3a
SF
1895 CvDEPTH(cv)++;
1896 PUSHMARK(SP);
1897 (void)(*CvXSUB(cv))(aTHX_ cv);
1898 CvDEPTH(cv)--;
1899 FREETMPS;
a57c6685 1900 LEAVE;
c127bd3a
SF
1901 return NORMAL;
1902 }
1903 else {
1904 PUSHBLOCK(cx, CXt_SUB, SP);
1905 PUSHSUB_DB(cx);
1906 cx->blk_sub.retop = PL_op->op_next;
1907 CvDEPTH(cv)++;
1908 SAVECOMPPAD();
1909 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1910 RETURNOP(CvSTART(cv));
1911 }
a0d0e21e
LW
1912 }
1913 else
1914 return NORMAL;
1915}
1916
a0d0e21e
LW
1917PP(pp_enteriter)
1918{
27da23d5 1919 dVAR; dSP; dMARK;
c09156bb 1920 register PERL_CONTEXT *cx;
f54cb97a 1921 const I32 gimme = GIMME_V;
a0d0e21e 1922 SV **svp;
840fe433 1923 U8 cxtype = CXt_LOOP_FOR;
7766f137 1924#ifdef USE_ITHREADS
e846cb92 1925 PAD *iterdata;
7766f137 1926#endif
a0d0e21e 1927
d343c3ef 1928 ENTER_with_name("loop1");
4633a7c4
LW
1929 SAVETMPS;
1930
533c011a 1931 if (PL_op->op_targ) {
14f338dc
DM
1932 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1933 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1934 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1935 SVs_PADSTALE, SVs_PADSTALE);
1936 }
09edbca0 1937 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
c3564e5c 1938#ifndef USE_ITHREADS
dd2155a4 1939 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
c3564e5c 1940#else
e846cb92 1941 iterdata = NULL;
7766f137 1942#endif
54b9620d
MB
1943 }
1944 else {
159b6efe 1945 GV * const gv = MUTABLE_GV(POPs);
7766f137 1946 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1947 SAVEGENERICSV(*svp);
561b68a9 1948 *svp = newSV(0);
7766f137 1949#ifdef USE_ITHREADS
e846cb92 1950 iterdata = (PAD*)gv;
7766f137 1951#endif
54b9620d 1952 }
4633a7c4 1953
0d863452
RH
1954 if (PL_op->op_private & OPpITER_DEF)
1955 cxtype |= CXp_FOR_DEF;
1956
d343c3ef 1957 ENTER_with_name("loop2");
a0d0e21e 1958
7766f137
GS
1959 PUSHBLOCK(cx, cxtype, SP);
1960#ifdef USE_ITHREADS
e846cb92 1961 PUSHLOOP_FOR(cx, iterdata, MARK, PL_op->op_targ);
7766f137 1962#else
52d1f6fb 1963 PUSHLOOP_FOR(cx, svp, MARK, 0);
7766f137 1964#endif
533c011a 1965 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
1966 SV *maybe_ary = POPs;
1967 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 1968 dPOPss;
d01136d6 1969 SV * const right = maybe_ary;
984a4bea
RD
1970 SvGETMAGIC(sv);
1971 SvGETMAGIC(right);
4fe3f0fa 1972 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 1973 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
1974 cx->cx_type |= CXt_LOOP_LAZYIV;
1975 /* Make sure that no-one re-orders cop.h and breaks our
1976 assumptions */
1977 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040
JH
1978#ifdef NV_PRESERVES_UV
1979 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1980 (SvNV(sv) > (NV)IV_MAX)))
1981 ||
1982 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1983 (SvNV(right) < (NV)IV_MIN))))
1984#else
1985 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1986 ||
1987 ((SvNV(sv) > 0) &&
1988 ((SvUV(sv) > (UV)IV_MAX) ||
1989 (SvNV(sv) > (NV)UV_MAX)))))
1990 ||
1991 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1992 ||
1993 ((SvNV(right) > 0) &&
1994 ((SvUV(right) > (UV)IV_MAX) ||
1995 (SvNV(right) > (NV)UV_MAX))))))
1996#endif
076d9a11 1997 DIE(aTHX_ "Range iterator outside integer range");
d01136d6
BS
1998 cx->blk_loop.state_u.lazyiv.cur = SvIV(sv);
1999 cx->blk_loop.state_u.lazyiv.end = SvIV(right);
d4665a05
DM
2000#ifdef DEBUGGING
2001 /* for correct -Dstv display */
2002 cx->blk_oldsp = sp - PL_stack_base;
2003#endif
89ea2908 2004 }
3f63a782 2005 else {
d01136d6
BS
2006 cx->cx_type &= ~CXTYPEMASK;
2007 cx->cx_type |= CXt_LOOP_LAZYSV;
2008 /* Make sure that no-one re-orders cop.h and breaks our
2009 assumptions */
2010 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2011 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2012 cx->blk_loop.state_u.lazysv.end = right;
2013 SvREFCNT_inc(right);
2014 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
2015 /* This will do the upgrade to SVt_PV, and warn if the value
2016 is uninitialised. */
10516c54 2017 (void) SvPV_nolen_const(right);
267cc4a8
NC
2018 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2019 to replace !SvOK() with a pointer to "". */
2020 if (!SvOK(right)) {
2021 SvREFCNT_dec(right);
d01136d6 2022 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2023 }
3f63a782 2024 }
89ea2908 2025 }
d01136d6 2026 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2027 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
2028 SvREFCNT_inc(maybe_ary);
2029 cx->blk_loop.state_u.ary.ix =
2030 (PL_op->op_private & OPpITER_REVERSED) ?
2031 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2032 -1;
ef3e5ea9 2033 }
89ea2908 2034 }
d01136d6
BS
2035 else { /* iterating over items on the stack */
2036 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2037 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2038 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
2039 }
2040 else {
d01136d6 2041 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2042 }
4633a7c4 2043 }
a0d0e21e
LW
2044
2045 RETURN;
2046}
2047
2048PP(pp_enterloop)
2049{
27da23d5 2050 dVAR; dSP;
c09156bb 2051 register PERL_CONTEXT *cx;
f54cb97a 2052 const I32 gimme = GIMME_V;
a0d0e21e 2053
d343c3ef 2054 ENTER_with_name("loop1");
a0d0e21e 2055 SAVETMPS;
d343c3ef 2056 ENTER_with_name("loop2");
a0d0e21e 2057
3b719c58
NC
2058 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2059 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2060
2061 RETURN;
2062}
2063
2064PP(pp_leaveloop)
2065{
27da23d5 2066 dVAR; dSP;
c09156bb 2067 register PERL_CONTEXT *cx;
a0d0e21e
LW
2068 I32 gimme;
2069 SV **newsp;
2070 PMOP *newpm;
2071 SV **mark;
2072
2073 POPBLOCK(cx,newpm);
3b719c58 2074 assert(CxTYPE_is_LOOP(cx));
4fdae800 2075 mark = newsp;
a8bba7fa 2076 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2077
a1f49e72 2078 TAINT_NOT;
54310121 2079 if (gimme == G_VOID)
6f207bd3 2080 NOOP;
54310121
PP
2081 else if (gimme == G_SCALAR) {
2082 if (mark < SP)
2083 *++newsp = sv_mortalcopy(*SP);
2084 else
3280af22 2085 *++newsp = &PL_sv_undef;
a0d0e21e
LW
2086 }
2087 else {
a1f49e72 2088 while (mark < SP) {
a0d0e21e 2089 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
2090 TAINT_NOT; /* Each item is independent */
2091 }
a0d0e21e 2092 }
f86702cc
PP
2093 SP = newsp;
2094 PUTBACK;
2095
a8bba7fa 2096 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2097 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2098
d343c3ef
GG
2099 LEAVE_with_name("loop2");
2100 LEAVE_with_name("loop1");
a0d0e21e 2101
f86702cc 2102 return NORMAL;
a0d0e21e
LW
2103}
2104
2105PP(pp_return)
2106{
27da23d5 2107 dVAR; dSP; dMARK;
c09156bb 2108 register PERL_CONTEXT *cx;
f86702cc 2109 bool popsub2 = FALSE;
b45de488 2110 bool clear_errsv = FALSE;
a0d0e21e
LW
2111 I32 gimme;
2112 SV **newsp;
2113 PMOP *newpm;
2114 I32 optype = 0;
b0d9ce38 2115 SV *sv;
b263a1ad 2116 OP *retop = NULL;
a0d0e21e 2117
0bd48802
AL
2118 const I32 cxix = dopoptosub(cxstack_ix);
2119
9850bf21
RH
2120 if (cxix < 0) {
2121 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2122 * sort block, which is a CXt_NULL
2123 * not a CXt_SUB */
2124 dounwind(0);
d7507f74
RH
2125 PL_stack_base[1] = *PL_stack_sp;
2126 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2127 return 0;
2128 }
9850bf21
RH
2129 else
2130 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2131 }
a0d0e21e
LW
2132 if (cxix < cxstack_ix)
2133 dounwind(cxix);
2134
d7507f74
RH
2135 if (CxMULTICALL(&cxstack[cxix])) {
2136 gimme = cxstack[cxix].blk_gimme;
2137 if (gimme == G_VOID)
2138 PL_stack_sp = PL_stack_base;
2139 else if (gimme == G_SCALAR) {
2140 PL_stack_base[1] = *PL_stack_sp;
2141 PL_stack_sp = PL_stack_base + 1;
2142 }
9850bf21 2143 return 0;
d7507f74 2144 }
9850bf21 2145
a0d0e21e 2146 POPBLOCK(cx,newpm);
6b35e009 2147 switch (CxTYPE(cx)) {
a0d0e21e 2148 case CXt_SUB:
f86702cc 2149 popsub2 = TRUE;
f39bc417 2150 retop = cx->blk_sub.retop;
5dd42e15 2151 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2152 break;
2153 case CXt_EVAL:
b45de488
GS
2154 if (!(PL_in_eval & EVAL_KEEPERR))
2155 clear_errsv = TRUE;
a0d0e21e 2156 POPEVAL(cx);
f39bc417 2157 retop = cx->blk_eval.retop;
1d76a5c3
GS
2158 if (CxTRYBLOCK(cx))
2159 break;
067f92a0 2160 lex_end();
748a9306
LW
2161 if (optype == OP_REQUIRE &&
2162 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2163 {
54310121 2164 /* Unassume the success we assumed earlier. */
901017d6 2165 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2166 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2167 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2168 }
a0d0e21e 2169 break;
7766f137
GS
2170 case CXt_FORMAT:
2171 POPFORMAT(cx);
f39bc417 2172 retop = cx->blk_sub.retop;
7766f137 2173 break;
a0d0e21e 2174 default:
cea2e8a9 2175 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2176 }
2177
a1f49e72 2178 TAINT_NOT;
a0d0e21e 2179 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2180 if (MARK < SP) {
2181 if (popsub2) {
a8bba7fa 2182 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2183 if (SvTEMP(TOPs)) {
2184 *++newsp = SvREFCNT_inc(*SP);
2185 FREETMPS;
2186 sv_2mortal(*newsp);
959e3673
GS
2187 }
2188 else {
2189 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2190 FREETMPS;
959e3673
GS
2191 *++newsp = sv_mortalcopy(sv);
2192 SvREFCNT_dec(sv);
a29cdaf0 2193 }
959e3673
GS
2194 }
2195 else
a29cdaf0 2196 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2197 }
2198 else
a29cdaf0 2199 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2200 }
2201 else
3280af22 2202 *++newsp = &PL_sv_undef;
a0d0e21e 2203 }
54310121 2204 else if (gimme == G_ARRAY) {
a1f49e72 2205 while (++MARK <= SP) {
f86702cc
PP
2206 *++newsp = (popsub2 && SvTEMP(*MARK))
2207 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2208 TAINT_NOT; /* Each item is independent */
2209 }
a0d0e21e 2210 }
3280af22 2211 PL_stack_sp = newsp;
a0d0e21e 2212
5dd42e15 2213 LEAVE;
f86702cc
PP
2214 /* Stack values are safe: */
2215 if (popsub2) {
5dd42e15 2216 cxstack_ix--;
b0d9ce38 2217 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2218 }
b0d9ce38 2219 else
c445ea15 2220 sv = NULL;
3280af22 2221 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2222
b0d9ce38 2223 LEAVESUB(sv);
8433848b 2224 if (clear_errsv) {
ab69dbc2 2225 CLEAR_ERRSV();
8433848b 2226 }
f39bc417 2227 return retop;
a0d0e21e
LW
2228}
2229
2230PP(pp_last)
2231{
27da23d5 2232 dVAR; dSP;
a0d0e21e 2233 I32 cxix;
c09156bb 2234 register PERL_CONTEXT *cx;
f86702cc 2235 I32 pop2 = 0;
a0d0e21e 2236 I32 gimme;
8772537c 2237 I32 optype;
b263a1ad 2238 OP *nextop = NULL;
a0d0e21e
LW
2239 SV **newsp;
2240 PMOP *newpm;
a8bba7fa 2241 SV **mark;
c445ea15 2242 SV *sv = NULL;
9d4ba2ae 2243
a0d0e21e 2244
533c011a 2245 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2246 cxix = dopoptoloop(cxstack_ix);
2247 if (cxix < 0)
a651a37d 2248 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2249 }
2250 else {
2251 cxix = dopoptolabel(cPVOP->op_pv);
2252 if (cxix < 0)
cea2e8a9 2253 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2254 }
2255 if (cxix < cxstack_ix)
2256 dounwind(cxix);
2257
2258 POPBLOCK(cx,newpm);
5dd42e15 2259 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2260 mark = newsp;
6b35e009 2261 switch (CxTYPE(cx)) {
c6fdafd0 2262 case CXt_LOOP_LAZYIV:
d01136d6 2263 case CXt_LOOP_LAZYSV:
3b719c58
NC
2264 case CXt_LOOP_FOR:
2265 case CXt_LOOP_PLAIN:
2266 pop2 = CxTYPE(cx);
a8bba7fa 2267 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2268 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2269 break;
f86702cc 2270 case CXt_SUB:
f86702cc 2271 pop2 = CXt_SUB;
f39bc417 2272 nextop = cx->blk_sub.retop;
a0d0e21e 2273 break;
f86702cc
PP
2274 case CXt_EVAL:
2275 POPEVAL(cx);
f39bc417 2276 nextop = cx->blk_eval.retop;
a0d0e21e 2277 break;
7766f137
GS
2278 case CXt_FORMAT:
2279 POPFORMAT(cx);
f39bc417 2280 nextop = cx->blk_sub.retop;
7766f137 2281 break;
a0d0e21e 2282 default:
cea2e8a9 2283 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2284 }
2285
a1f49e72 2286 TAINT_NOT;
a0d0e21e 2287 if (gimme == G_SCALAR) {
f86702cc
PP
2288 if (MARK < SP)
2289 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2290 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2291 else
3280af22 2292 *++newsp = &PL_sv_undef;
a0d0e21e 2293 }
54310121 2294 else if (gimme == G_ARRAY) {
a1f49e72 2295 while (++MARK <= SP) {
f86702cc
PP
2296 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2297 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2298 TAINT_NOT; /* Each item is independent */
2299 }
f86702cc
PP
2300 }
2301 SP = newsp;
2302 PUTBACK;
2303
5dd42e15
DM
2304 LEAVE;
2305 cxstack_ix--;
f86702cc
PP
2306 /* Stack values are safe: */
2307 switch (pop2) {
c6fdafd0 2308 case CXt_LOOP_LAZYIV:
3b719c58 2309 case CXt_LOOP_PLAIN:
d01136d6 2310 case CXt_LOOP_LAZYSV:
3b719c58 2311 case CXt_LOOP_FOR:
a8bba7fa 2312 POPLOOP(cx); /* release loop vars ... */
4fdae800 2313 LEAVE;
f86702cc
PP
2314 break;
2315 case CXt_SUB:
b0d9ce38 2316 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2317 break;
a0d0e21e 2318 }
3280af22 2319 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2320
b0d9ce38 2321 LEAVESUB(sv);
9d4ba2ae
AL
2322 PERL_UNUSED_VAR(optype);
2323 PERL_UNUSED_VAR(gimme);
f86702cc 2324 return nextop;
a0d0e21e
LW
2325}
2326
2327PP(pp_next)
2328{
27da23d5 2329 dVAR;
a0d0e21e 2330 I32 cxix;
c09156bb 2331 register PERL_CONTEXT *cx;
85538317 2332 I32 inner;
a0d0e21e 2333
533c011a 2334 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2335 cxix = dopoptoloop(cxstack_ix);
2336 if (cxix < 0)
a651a37d 2337 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2338 }
2339 else {
2340 cxix = dopoptolabel(cPVOP->op_pv);
2341 if (cxix < 0)
cea2e8a9 2342 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2343 }
2344 if (cxix < cxstack_ix)
2345 dounwind(cxix);
2346
85538317
GS
2347 /* clear off anything above the scope we're re-entering, but
2348 * save the rest until after a possible continue block */
2349 inner = PL_scopestack_ix;
1ba6ee2b 2350 TOPBLOCK(cx);
85538317
GS
2351 if (PL_scopestack_ix < inner)
2352 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2353 PL_curcop = cx->blk_oldcop;
022eaa24 2354 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2355}
2356
2357PP(pp_redo)
2358{
27da23d5 2359 dVAR;
a0d0e21e 2360 I32 cxix;
c09156bb 2361 register PERL_CONTEXT *cx;
a0d0e21e 2362 I32 oldsave;
a034e688 2363 OP* redo_op;
a0d0e21e 2364
533c011a 2365 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2366 cxix = dopoptoloop(cxstack_ix);
2367 if (cxix < 0)
a651a37d 2368 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2369 }
2370 else {
2371 cxix = dopoptolabel(cPVOP->op_pv);
2372 if (cxix < 0)
cea2e8a9 2373 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2374 }
2375 if (cxix < cxstack_ix)
2376 dounwind(cxix);
2377
022eaa24 2378 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2379 if (redo_op->op_type == OP_ENTER) {
2380 /* pop one less context to avoid $x being freed in while (my $x..) */
2381 cxstack_ix++;
2382 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2383 redo_op = redo_op->op_next;
2384 }
2385
a0d0e21e 2386 TOPBLOCK(cx);
3280af22 2387 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2388 LEAVE_SCOPE(oldsave);
936c78b5 2389 FREETMPS;
3a1b2b9e 2390 PL_curcop = cx->blk_oldcop;
a034e688 2391 return redo_op;
a0d0e21e
LW
2392}
2393
0824fdcb 2394STATIC OP *
bfed75c6 2395S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2396{
97aff369 2397 dVAR;
a0d0e21e 2398 OP **ops = opstack;
bfed75c6 2399 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2400
7918f24d
NC
2401 PERL_ARGS_ASSERT_DOFINDLABEL;
2402
fc36a67e 2403 if (ops >= oplimit)
cea2e8a9 2404 Perl_croak(aTHX_ too_deep);
11343788
MB
2405 if (o->op_type == OP_LEAVE ||
2406 o->op_type == OP_SCOPE ||
2407 o->op_type == OP_LEAVELOOP ||
33d34e4c 2408 o->op_type == OP_LEAVESUB ||
11343788 2409 o->op_type == OP_LEAVETRY)
fc36a67e 2410 {
5dc0d613 2411 *ops++ = cUNOPo->op_first;
fc36a67e 2412 if (ops >= oplimit)
cea2e8a9 2413 Perl_croak(aTHX_ too_deep);
fc36a67e 2414 }
c4aa4e48 2415 *ops = 0;
11343788 2416 if (o->op_flags & OPf_KIDS) {
aec46f14 2417 OP *kid;
a0d0e21e 2418 /* First try all the kids at this level, since that's likeliest. */
11343788 2419 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac
AD
2420 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2421 const char *kid_label = CopLABEL(kCOP);
2422 if (kid_label && strEQ(kid_label, label))
2423 return kid;
2424 }
a0d0e21e 2425 }
11343788 2426 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2427 if (kid == PL_lastgotoprobe)
a0d0e21e 2428 continue;
ed8d0fe2
SM
2429 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2430 if (ops == opstack)
2431 *ops++ = kid;
2432 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2433 ops[-1]->op_type == OP_DBSTATE)
2434 ops[-1] = kid;
2435 else
2436 *ops++ = kid;
2437 }
155aba94 2438 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2439 return o;
a0d0e21e
LW
2440 }
2441 }
c4aa4e48 2442 *ops = 0;
a0d0e21e
LW
2443 return 0;
2444}
2445
a0d0e21e
LW
2446PP(pp_goto)
2447{
27da23d5 2448 dVAR; dSP;
cbbf8932 2449 OP *retop = NULL;
a0d0e21e 2450 I32 ix;
c09156bb 2451 register PERL_CONTEXT *cx;
fc36a67e
PP
2452#define GOTO_DEPTH 64
2453 OP *enterops[GOTO_DEPTH];
cbbf8932 2454 const char *label = NULL;
bfed75c6
AL
2455 const bool do_dump = (PL_op->op_type == OP_DUMP);
2456 static const char must_have_label[] = "goto must have label";
a0d0e21e 2457
533c011a 2458 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2459 SV * const sv = POPs;
a0d0e21e
LW
2460
2461 /* This egregious kludge implements goto &subroutine */
2462 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2463 I32 cxix;
c09156bb 2464 register PERL_CONTEXT *cx;
ea726b52 2465 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW
2466 SV** mark;
2467 I32 items = 0;
2468 I32 oldsave;
b1464ded 2469 bool reified = 0;
a0d0e21e 2470
e8f7dd13 2471 retry:
4aa0a1f7 2472 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2473 const GV * const gv = CvGV(cv);
e8f7dd13 2474 if (gv) {
7fc63493 2475 GV *autogv;
e8f7dd13
GS
2476 SV *tmpstr;
2477 /* autoloaded stub? */
2478 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2479 goto retry;
2480 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2481 GvNAMELEN(gv), FALSE);
2482 if (autogv && (cv = GvCV(autogv)))
2483 goto retry;
2484 tmpstr = sv_newmortal();
c445ea15 2485 gv_efullname3(tmpstr, gv, NULL);
be2597df 2486 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2487 }
cea2e8a9 2488 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2489 }
2490
a0d0e21e 2491 /* First do some returnish stuff. */
b37c2d43 2492 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2493 FREETMPS;
a0d0e21e
LW
2494 cxix = dopoptosub(cxstack_ix);
2495 if (cxix < 0)
cea2e8a9 2496 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2497 if (cxix < cxstack_ix)
2498 dounwind(cxix);
2499 TOPBLOCK(cx);
2d43a17f 2500 SPAGAIN;
564abe23 2501 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2502 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2503 if (CxREALEVAL(cx))
2504 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2505 else
2506 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2507 }
9850bf21
RH
2508 else if (CxMULTICALL(cx))
2509 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2510 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2511 /* put @_ back onto stack */
a0d0e21e 2512 AV* av = cx->blk_sub.argarray;
bfed75c6 2513
93965878 2514 items = AvFILLp(av) + 1;
a45cdc79
DM
2515 EXTEND(SP, items+1); /* @_ could have been extended. */
2516 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2517 SvREFCNT_dec(GvAV(PL_defgv));
2518 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2519 CLEAR_ARGARRAY(av);
d8b46c1b 2520 /* abandon @_ if it got reified */
62b1ebc2 2521 if (AvREAL(av)) {
b1464ded
DM
2522 reified = 1;
2523 SvREFCNT_dec(av);
d8b46c1b
GS
2524 av = newAV();
2525 av_extend(av, items-1);
11ca45c0 2526 AvREIFY_only(av);
ad64d0ec 2527 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2528 }
a0d0e21e 2529 }
aed2304a 2530 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2531 AV* const av = GvAV(PL_defgv);
1fa4e549 2532 items = AvFILLp(av) + 1;
a45cdc79
DM
2533 EXTEND(SP, items+1); /* @_ could have been extended. */
2534 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2535 }
a45cdc79
DM
2536 mark = SP;
2537 SP += items;
6b35e009 2538 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2539 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2540 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2541 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2542 LEAVE_SCOPE(oldsave);
2543
2544 /* Now do some callish stuff. */
2545 SAVETMPS;
5023d17a 2546 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2547 if (CvISXSUB(cv)) {
b37c2d43 2548 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2549 SV **newsp;
2550 I32 gimme;
b1464ded
DM
2551 if (reified) {
2552 I32 index;
2553 for (index=0; index<items; index++)
2554 sv_2mortal(SP[-index]);
2555 }
1fa4e549 2556
b37c2d43
AL
2557 /* XS subs don't have a CxSUB, so pop it */
2558 POPBLOCK(cx, PL_curpm);
2559 /* Push a mark for the start of arglist */
2560 PUSHMARK(mark);
2561 PUTBACK;
2562 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2563 LEAVE;
5eff7df7 2564 return retop;
a0d0e21e
LW
2565 }
2566 else {
b37c2d43 2567 AV* const padlist = CvPADLIST(cv);
6b35e009 2568 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2569 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2570 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2571 cx->cx_type = CXt_SUB;
b150fb22 2572 }
a0d0e21e 2573 cx->blk_sub.cv = cv;
1a5b3db4 2574 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2575
a0d0e21e
LW
2576 CvDEPTH(cv)++;
2577 if (CvDEPTH(cv) < 2)
74c765eb 2578 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2579 else {
2b9dff67 2580 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2581 sub_crush_depth(cv);
26019298 2582 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2583 }
fd617465
DM
2584 SAVECOMPPAD();
2585 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2586 if (CxHASARGS(cx))
6d4ff0d2 2587 {
502c6561 2588 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2589
3280af22 2590 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2591 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2592 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2593 cx->blk_sub.argarray = av;
a0d0e21e
LW
2594
2595 if (items >= AvMAX(av) + 1) {
b37c2d43 2596 SV **ary = AvALLOC(av);
a0d0e21e
LW
2597 if (AvARRAY(av) != ary) {
2598 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2599 AvARRAY(av) = ary;
a0d0e21e
LW
2600 }
2601 if (items >= AvMAX(av) + 1) {
2602 AvMAX(av) = items - 1;
2603 Renew(ary,items+1,SV*);
2604 AvALLOC(av) = ary;
9c6bc640 2605 AvARRAY(av) = ary;
a0d0e21e
LW
2606 }
2607 }
a45cdc79 2608 ++mark;
a0d0e21e 2609 Copy(mark,AvARRAY(av),items,SV*);
93965878 2610 AvFILLp(av) = items - 1;
d8b46c1b 2611 assert(!AvREAL(av));
b1464ded
DM
2612 if (reified) {
2613 /* transfer 'ownership' of refcnts to new @_ */
2614 AvREAL_on(av);
2615 AvREIFY_off(av);
2616 }
a0d0e21e
LW
2617 while (items--) {
2618 if (*mark)
2619 SvTEMP_off(*mark);
2620 mark++;
2621 }
2622 }
491527d0 2623 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2624 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2625 if (PERLDB_GOTO) {
b96d8cd9 2626 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2627 if (gotocv) {
2628 PUSHMARK( PL_stack_sp );
ad64d0ec 2629 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2630 PL_stack_sp--;
2631 }
491527d0 2632 }
1ce6579f 2633 }
a0d0e21e
LW
2634 RETURNOP(CvSTART(cv));
2635 }
2636 }
1614b0e3 2637 else {
0510663f 2638 label = SvPV_nolen_const(sv);
1614b0e3 2639 if (!(do_dump || *label))
cea2e8a9 2640 DIE(aTHX_ must_have_label);
1614b0e3 2641 }
a0d0e21e 2642 }
533c011a 2643 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2644 if (! do_dump)
cea2e8a9 2645 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2646 }
2647 else
2648 label = cPVOP->op_pv;
2649
2650 if (label && *label) {
cbbf8932 2651 OP *gotoprobe = NULL;
3b2447bc 2652 bool leaving_eval = FALSE;
33d34e4c 2653 bool in_block = FALSE;
cbbf8932 2654 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2655
2656 /* find label */
2657
d4c19fe8 2658 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2659 *enterops = 0;
2660 for (ix = cxstack_ix; ix >= 0; ix--) {
2661 cx = &cxstack[ix];
6b35e009 2662 switch (CxTYPE(cx)) {
a0d0e21e 2663 case CXt_EVAL:
3b2447bc 2664 leaving_eval = TRUE;
971ecbe6 2665 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2666 gotoprobe = (last_eval_cx ?
2667 last_eval_cx->blk_eval.old_eval_root :
2668 PL_eval_root);
2669 last_eval_cx = cx;
9c5794fe
RH
2670 break;
2671 }
2672 /* else fall through */
c6fdafd0 2673 case CXt_LOOP_LAZYIV:
d01136d6 2674 case CXt_LOOP_LAZYSV:
3b719c58
NC
2675 case CXt_LOOP_FOR:
2676 case CXt_LOOP_PLAIN:
bb5aedc1
VP
2677 case CXt_GIVEN:
2678 case CXt_WHEN:
a0d0e21e
LW
2679 gotoprobe = cx->blk_oldcop->op_sibling;
2680 break;
2681 case CXt_SUBST:
2682 continue;
2683 case CXt_BLOCK:
33d34e4c 2684 if (ix) {
a0d0e21e 2685 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2686 in_block = TRUE;
2687 } else
3280af22 2688 gotoprobe = PL_main_root;
a0d0e21e 2689 break;
b3933176 2690 case CXt_SUB:
9850bf21 2691 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2692 gotoprobe = CvROOT(cx->blk_sub.cv);
2693 break;
2694 }
2695 /* FALL THROUGH */
7766f137 2696 case CXt_FORMAT:
0a753a76 2697 case CXt_NULL:
a651a37d 2698 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2699 default:
2700 if (ix)
cea2e8a9 2701 DIE(aTHX_ "panic: goto");
3280af22 2702 gotoprobe = PL_main_root;
a0d0e21e
LW
2703 break;
2704 }
2b597662
GS
2705 if (gotoprobe) {
2706 retop = dofindlabel(gotoprobe, label,
2707 enterops, enterops + GOTO_DEPTH);
2708 if (retop)
2709 break;
2710 }
3280af22 2711 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2712 }
2713 if (!retop)
cea2e8a9 2714 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2715
3b2447bc
RH
2716 /* if we're leaving an eval, check before we pop any frames
2717 that we're not going to punt, otherwise the error
2718 won't be caught */
2719
2720 if (leaving_eval && *enterops && enterops[1]) {
2721 I32 i;
2722 for (i = 1; enterops[i]; i++)
2723 if (enterops[i]->op_type == OP_ENTERITER)
2724 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2725 }
2726
b500e03b
GG
2727 if (*enterops && enterops[1]) {
2728 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2729 if (enterops[i])
2730 deprecate("\"goto\" to jump into a construct");
2731 }
2732
a0d0e21e
LW
2733 /* pop unwanted frames */
2734
2735 if (ix < cxstack_ix) {
2736 I32 oldsave;
2737
2738 if (ix < 0)
2739 ix = 0;
2740 dounwind(ix);
2741 TOPBLOCK(cx);
3280af22 2742 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2743 LEAVE_SCOPE(oldsave);
2744 }
2745
2746 /* push wanted frames */
2747
748a9306 2748 if (*enterops && enterops[1]) {
0bd48802 2749 OP * const oldop = PL_op;
33d34e4c
AE
2750 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2751 for (; enterops[ix]; ix++) {
533c011a 2752 PL_op = enterops[ix];
84902520
TB
2753 /* Eventually we may want to stack the needed arguments
2754 * for each op. For now, we punt on the hard ones. */
533c011a 2755 if (PL_op->op_type == OP_ENTERITER)
894356b3 2756 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2757 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2758 }
533c011a 2759 PL_op = oldop;
a0d0e21e
LW
2760 }
2761 }
2762
2763 if (do_dump) {
a5f75d66 2764#ifdef VMS
6b88bc9c 2765 if (!retop) retop = PL_main_start;
a5f75d66 2766#endif
3280af22
NIS
2767 PL_restartop = retop;
2768 PL_do_undump = TRUE;
a0d0e21e
LW
2769
2770 my_unexec();
2771
3280af22
NIS
2772 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2773 PL_do_undump = FALSE;
a0d0e21e
LW
2774 }
2775
2776 RETURNOP(retop);
2777}
2778
2779PP(pp_exit)
2780{
97aff369 2781 dVAR;
39644a26 2782 dSP;
a0d0e21e
LW
2783 I32 anum;
2784
2785 if (MAXARG < 1)
2786 anum = 0;
ff0cee69 2787 else {
a0d0e21e 2788 anum = SvIVx(POPs);
d98f61e7
GS
2789#ifdef VMS
2790 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2791 anum = 0;
96e176bf 2792 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2793#endif
2794 }
cc3604b1 2795 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2796#ifdef PERL_MAD
2797 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2798 if (anum || !(PL_minus_c && PL_madskills))
2799 my_exit(anum);
2800#else
a0d0e21e 2801 my_exit(anum);
81d86705 2802#endif
3280af22 2803 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2804 RETURN;
2805}
2806
a0d0e21e
LW
2807/* Eval. */
2808
0824fdcb 2809STATIC void
cea2e8a9 2810S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2811{
504618e9 2812 const char *s = SvPVX_const(sv);
890ce7af 2813 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2814 I32 line = 1;
a0d0e21e 2815
7918f24d
NC
2816 PERL_ARGS_ASSERT_SAVE_LINES;
2817
a0d0e21e 2818 while (s && s < send) {
f54cb97a 2819 const char *t;
b9f83d2f 2820 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2821
1d963ff3 2822 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
2823 if (t)
2824 t++;
2825 else
2826 t = send;
2827
2828 sv_setpvn(tmpstr, s, t - s);
2829 av_store(array, line++, tmpstr);
2830 s = t;
2831 }
2832}
2833
22f16304
RU
2834/*
2835=for apidoc docatch
2836
2837Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
2838
28390 is used as continue inside eval,
2840
28413 is used for a die caught by an inner eval - continue inner loop
2842
2843See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
2844establish a local jmpenv to handle exception traps.
2845
2846=cut
2847*/
0824fdcb 2848STATIC OP *
cea2e8a9 2849S_docatch(pTHX_ OP *o)
1e422769 2850{
97aff369 2851 dVAR;
6224f72b 2852 int ret;
06b5626a 2853 OP * const oldop = PL_op;
db36c5a1 2854 dJMPENV;
1e422769 2855
1e422769 2856#ifdef DEBUGGING
54310121 2857 assert(CATCH_GET == TRUE);
1e422769 2858#endif
312caa8e 2859 PL_op = o;
8bffa5f8 2860
14dd3ad8 2861 JMPENV_PUSH(ret);
6224f72b 2862 switch (ret) {
312caa8e 2863 case 0:
abd70938
DM
2864 assert(cxstack_ix >= 0);
2865 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2866 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2867 redo_body:
85aaa934 2868 CALLRUNOPS(aTHX);
312caa8e
CS
2869 break;
2870 case 3:
8bffa5f8 2871 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2872
2873 /* NB XXX we rely on the old popped CxEVAL still being at the top
2874 * of the stack; the way die_where() currently works, this
2875 * assumption is valid. In theory The cur_top_env value should be
2876 * returned in another global, the way retop (aka PL_restartop)
2877 * is. */
2878 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2879
2880 if (PL_restartop
2881 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2882 {
312caa8e
CS
2883 PL_op = PL_restartop;
2884 PL_restartop = 0;
2885 goto redo_body;
2886 }
2887 /* FALL THROUGH */
2888 default:
14dd3ad8 2889 JMPENV_POP;
533c011a 2890 PL_op = oldop;
6224f72b 2891 JMPENV_JUMP(ret);
1e422769 2892 /* NOTREACHED */
1e422769 2893 }
14dd3ad8 2894 JMPENV_POP;
533c011a 2895 PL_op = oldop;
5f66b61c 2896 return NULL;
1e422769
PP
2897}
2898
c277df42 2899OP *
bfed75c6 2900Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2901/* sv Text to convert to OP tree. */
2902/* startop op_free() this to undo. */
2903/* code Short string id of the caller. */
2904{
f7997f86 2905 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2906 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2907 PERL_CONTEXT *cx;
2908 SV **newsp;
b094c71d 2909 I32 gimme = G_VOID;
c277df42
IZ
2910 I32 optype;
2911 OP dummy;
83ee9e09
GS
2912 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2913 char *tmpbuf = tbuf;
c277df42 2914 char *safestr;
a3985cdc 2915 int runtime;
601f1833 2916 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2917 STRLEN len;
c277df42 2918
7918f24d
NC
2919 PERL_ARGS_ASSERT_SV_COMPILE_2OP;
2920
d343c3ef 2921 ENTER_with_name("eval");
5486870f 2922 lex_start(sv, NULL, FALSE);
c277df42
IZ
2923 SAVETMPS;
2924 /* switch to eval mode */
2925
923e4eb5 2926 if (IN_PERL_COMPILETIME) {
f4dd75d9 2927 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2928 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2929 }
83ee9e09 2930 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2931 SV * const sv = sv_newmortal();
83ee9e09
GS
2932 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2933 code, (unsigned long)++PL_evalseq,
2934 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2935 tmpbuf = SvPVX(sv);
fc009855 2936 len = SvCUR(sv);
83ee9e09
GS
2937 }
2938 else
d9fad198
JH
2939 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2940 (unsigned long)++PL_evalseq);
f4dd75d9 2941 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2942 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2943 SAVECOPLINE(&PL_compiling);
57843af0 2944 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2945 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2946 deleting the eval's FILEGV from the stash before gv_check() runs
2947 (i.e. before run-time proper). To work around the coredump that
2948 ensues, we always turn GvMULTI_on for any globals that were
2949 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2950 safestr = savepvn(tmpbuf, len);
2951 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2952 SAVEHINTS();
d1ca3daa 2953#ifdef OP_IN_REGISTER
6b88bc9c 2954 PL_opsave = op;
d1ca3daa 2955#else
7766f137 2956 SAVEVPTR(PL_op);
d1ca3daa 2957#endif
c277df42 2958
a3985cdc 2959 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2960 runtime = IN_PERL_RUNTIME;
a3985cdc 2961 if (runtime)
d819b83a 2962 runcv = find_runcv(NULL);
a3985cdc 2963
533c011a 2964 PL_op = &dummy;
13b51b79 2965 PL_op->op_type = OP_ENTEREVAL;
533c011a 2966 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2967 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 2968 PUSHEVAL(cx, 0);
a3985cdc
DM
2969
2970 if (runtime)
410be5db 2971 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2972 else
410be5db 2973 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2974 POPBLOCK(cx,PL_curpm);
e84b9f1f 2975 POPEVAL(cx);
c277df42
IZ
2976
2977 (*startop)->op_type = OP_NULL;
22c35a8c 2978 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2979 lex_end();
f3548bdc 2980 /* XXX DAPM do this properly one year */
502c6561 2981 *padp = MUTABLE_AV(SvREFCNT_inc_simple(PL_comppad));
d343c3ef 2982 LEAVE_with_name("eval");
923e4eb5 2983 if (IN_PERL_COMPILETIME)
623e6609 2984 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2985#ifdef OP_IN_REGISTER
6b88bc9c 2986 op = PL_opsave;
d1ca3daa 2987#endif
9d4ba2ae
AL
2988 PERL_UNUSED_VAR(newsp);
2989 PERL_UNUSED_VAR(optype);
2990
410be5db 2991 return PL_eval_start;
c277df42
IZ
2992}
2993
a3985cdc
DM
2994
2995/*
2996=for apidoc find_runcv
2997
2998Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2999If db_seqp is non_null, skip CVs that are in the DB package and populate
3000*db_seqp with the cop sequence number at the point that the DB:: code was
3001entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 3002than in the scope of the debugger itself).
a3985cdc
DM
3003
3004=cut
3005*/
3006
3007CV*
d819b83a 3008Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3009{
97aff369 3010 dVAR;
a3985cdc 3011 PERL_SI *si;
a3985cdc 3012
d819b83a
DM
3013 if (db_seqp)
3014 *db_seqp = PL_curcop->cop_seq;
a3985cdc 3015 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3016 I32 ix;
a3985cdc 3017 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3018 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 3019 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 3020 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
3021 /* skip DB:: code */
3022 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3023 *db_seqp = cx->blk_oldcop->cop_seq;
3024 continue;
3025 }
3026 return cv;
3027 }
a3985cdc
DM
3028 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
3029 return PL_compcv;
3030 }
3031 }
3032 return PL_main_cv;
3033}
3034
3035
3036/* Compile a require/do, an eval '', or a /(?{...})/.
3037 * In the last case, startop is non-null, and contains the address of
3038 * a pointer that should be set to the just-compiled code.
3039 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM
3040 * Returns a bool indicating whether the compile was successful; if so,
3041 * PL_eval_start contains the first op of the compiled ocde; otherwise,
3042 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM
3043 */
3044
410be5db 3045STATIC bool
a3985cdc 3046S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 3047{
27da23d5 3048 dVAR; dSP;
46c461b5 3049 OP * const saveop = PL_op;
a0d0e21e 3050
6dc8a9e4
IZ
3051 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
3052 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
3053 : EVAL_INEVAL);
a0d0e21e 3054
1ce6579f
PP
3055 PUSHMARK(SP);
3056
3280af22 3057 SAVESPTR(PL_compcv);
ea726b52 3058 PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
1aff0e91 3059 CvEVAL_on(PL_compcv);
2090ab20
JH
3060 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3061 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
3062
a3985cdc 3063 CvOUTSIDE_SEQ(PL_compcv) = seq;
ea726b52 3064 CvOUTSIDE(PL_compcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3065
dd2155a4 3066 /* set up a scratch pad */
a0d0e21e 3067
dd2155a4 3068 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 3069 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3070
07055b4c 3071
81d86705
NC
3072 if (!PL_madskills)
3073 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 3074
a0d0e21e
LW
3075 /* make sure we compile in the right package */
3076
ed094faf 3077 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 3078 SAVESPTR(PL_curstash);
ed094faf 3079 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 3080 }
3c10abe3 3081 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
3082 SAVESPTR(PL_beginav);
3083 PL_beginav = newAV();
3084 SAVEFREESV(PL_beginav);
3c10abe3
AG
3085 SAVESPTR(PL_unitcheckav);
3086 PL_unitcheckav = newAV();
3087 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3088
81d86705 3089#ifdef PERL_MAD
9da243ce 3090 SAVEBOOL(PL_madskills);
81d86705
NC
3091 PL_madskills = 0;
3092#endif
3093
a0d0e21e
LW
3094 /* try to compile it */
3095
5f66b61c 3096 PL_eval_root = NULL;
3280af22 3097 PL_curcop = &PL_compiling;
fc15ae8f 3098 CopARYBASE_set(PL_curcop, 0);
5f66b61c 3099 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3100 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS
3101 else
3102 CLEAR_ERRSV();
13765c85 3103 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 3104 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 3105 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 3106 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 3107 const char *msg;
bfed75c6 3108
533c011a 3109 PL_op = saveop;
3280af22
NIS
3110 if (PL_eval_root) {
3111 op_free(PL_eval_root);
5f66b61c 3112 PL_eval_root = NULL;
a0d0e21e 3113 }
3280af22 3114 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 3115 if (!startop) {
3280af22 3116 POPBLOCK(cx,PL_curpm);
c277df42 3117 POPEVAL(cx);
c277df42 3118 }
a0d0e21e 3119 lex_end();
d343c3ef 3120 LEAVE_with_name("eval"); /* pp_entereval knows about this LEAVE. */
9d4ba2ae
AL
3121
3122 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 3123 if (optype == OP_REQUIRE) {
b464bac0 3124 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 3125 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 3126 &PL_sv_undef, 0);
58d3fd3b
SH
3127 Perl_croak(aTHX_ "%sCompilation failed in require",
3128 *msg ? msg : "Unknown error\n");
5a844595
GS
3129 }
3130 else if (startop) {
3280af22 3131 POPBLOCK(cx,PL_curpm);
c277df42 3132 POPEVAL(cx);
5a844595
GS
3133 Perl_croak(aTHX_ "%sCompilation failed in regexp",
3134 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 3135 }
9d7f88dd 3136 else {
9d7f88dd 3137 if (!*msg) {
6502358f 3138 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
3139 }
3140 }
9d4ba2ae 3141 PERL_UNUSED_VAR(newsp);
410be5db
DM
3142 PUSHs(&PL_sv_undef);
3143 PUTBACK;
3144 return FALSE;
a0d0e21e 3145 }
57843af0 3146 CopLINE_set(&PL_compiling, 0);
c277df42 3147 if (startop) {
3280af22 3148 *startop = PL_eval_root;
c277df42 3149 } else
3280af22 3150 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
3151
3152 /* Set the context for this new optree.
021f53de
GG
3153 * Propagate the context from the eval(). */
3154 if ((gimme & G_WANT) == G_VOID)
3280af22 3155 scalarvoid(PL_eval_root);
7df0357e 3156 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3157 list(PL_eval_root);
a0d0e21e 3158 else
3280af22 3159 scalar(PL_eval_root);
a0d0e21e
LW
3160
3161 DEBUG_x(dump_eval());
3162
55497cff 3163 /* Register with debugger: */
6482a30d 3164 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
b96d8cd9 3165 CV * const cv = get_cvs("DB::postponed", 0);
55497cff
PP
3166 if (cv) {
3167 dSP;
924508f0 3168 PUSHMARK(SP);
ad64d0ec 3169 XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling)));
55497cff 3170 PUTBACK;
ad64d0ec 3171 call_sv(MUTABLE_SV(cv), G_DISCARD);
55497cff
PP
3172 }
3173 }
3174
3c10abe3
AG
3175 if (PL_unitcheckav)
3176 call_list(PL_scopestack_ix, PL_unitcheckav);
3177
a0d0e21e
LW
3178 /* compiled okay, so do it */
3179
3280af22
NIS
3180 CvDEPTH(PL_compcv) = 1;
3181 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3182 PL_op = saveop; /* The caller may need it. */
bc177e6b 3183 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3184
410be5db
DM
3185 PUTBACK;
3186 return TRUE;
a0d0e21e
LW
3187}
3188
a6c40364 3189STATIC PerlIO *
0786552a 3190S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP
3191{
3192 Stat_t st;
c445ea15 3193 const int st_rc = PerlLIO_stat(name, &st);
df528165 3194
7918f24d
NC
3195 PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN;
3196
6b845e56 3197 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3198 return NULL;
ce8abf5f
SP
3199 }
3200
0786552a 3201 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP
3202}
3203
75c20bac 3204#ifndef PERL_DISABLE_PMC
ce8abf5f 3205STATIC PerlIO *
0786552a 3206S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3207{
b295d113
TH
3208 PerlIO *fp;
3209
7918f24d
NC
3210 PERL_ARGS_ASSERT_DOOPEN_PM;
3211
ce9440c8 3212 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC
3213 SV *const pmcsv = newSV(namelen + 2);
3214 char *const pmc = SvPVX(pmcsv);
a6c40364 3215 Stat_t pmcstat;
50b8ed39
NC
3216
3217 memcpy(pmc, name, namelen);
3218 pmc[namelen] = 'c';
3219 pmc[namelen + 1] = '\0';
3220
a6c40364 3221 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3222 fp = check_type_and_open(name);
a6c40364
GS
3223 }
3224 else {
0786552a 3225 fp = check_type_and_open(pmc);
b295d113 3226 }
a6c40364
GS
3227 SvREFCNT_dec(pmcsv);
3228 }
3229 else {
0786552a 3230 fp = check_type_and_open(name);
b295d113 3231 }
b295d113 3232 return fp;
75c20bac 3233}
7925835c 3234#else
75c20bac 3235# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3236#endif /* !PERL_DISABLE_PMC */
b295d113 3237
a0d0e21e
LW
3238PP(pp_require)
3239{
27da23d5 3240 dVAR; dSP;
c09156bb 3241 register PERL_CONTEXT *cx;
a0d0e21e 3242 SV *sv;
5c144d81 3243 const char *name;
6132ea6c 3244 STRLEN len;
4492be7a
JM
3245 char * unixname;
3246 STRLEN unixlen;
62f5ad7a 3247#ifdef VMS
4492be7a 3248 int vms_unixname = 0;
62f5ad7a 3249#endif
c445ea15
AL
3250 const char *tryname = NULL;
3251 SV *namesv = NULL;
f54cb97a 3252 const I32 gimme = GIMME_V;
bbed91b5 3253 int filter_has_file = 0;
c445ea15 3254 PerlIO *tryrsfp = NULL;
34113e50 3255 SV *filter_cache = NULL;
c445ea15
AL
3256 SV *filter_state = NULL;
3257 SV *filter_sub = NULL;
3258 SV *hook_sv = NULL;
6ec9efec
JH
3259 SV *encoding;
3260 OP *op;
a0d0e21e
LW
3261
3262 sv = POPs;
d7aa5382 3263 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP
3264 sv = new_version(sv);
3265 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3266 upg_version(PL_patchlevel, TRUE);
149c1637 3267 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3268 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3269 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3270 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3271 }
3272 else {
d1029faa
JP
3273 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3274 I32 first = 0;
3275 AV *lav;
3276 SV * const req = SvRV(sv);
85fbaab2 3277 SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE);
d1029faa
JP
3278
3279 /* get the left hand term */
502c6561 3280 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE)));
d1029faa
JP
3281
3282 first = SvIV(*av_fetch(lav,0,0));
3283 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
85fbaab2 3284 || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
d1029faa
JP
3285 || av_len(lav) > 1 /* FP with > 3 digits */
3286 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3287 ) {
3288 DIE(aTHX_ "Perl %"SVf" required--this is only "
3289 "%"SVf", stopped", SVfARG(vnormal(req)),
3290 SVfARG(vnormal(PL_patchlevel)));
3291 }
3292 else { /* probably 'use 5.10' or 'use 5.8' */
af61dbfd 3293 SV *hintsv;
d1029faa
JP
3294 I32 second = 0;
3295
3296 if (av_len(lav)>=1)
3297 second = SvIV(*av_fetch(lav,1,0));
3298
3299 second /= second >= 600 ? 100 : 10;
af61dbfd
NC
3300 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.0",
3301 (int)first, (int)second);
d1029faa
JP
3302 upg_version(hintsv, TRUE);
3303
3304 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3305 "--this is only %"SVf", stopped",
3306 SVfARG(vnormal(req)),
af61dbfd 3307 SVfARG(vnormal(sv_2mortal(hintsv))),
d1029faa
JP
3308 SVfARG(vnormal(PL_patchlevel)));
3309 }
3310 }
468aa647 3311 }
d7aa5382 3312
fbc891ce
RB
3313 /* We do this only with use, not require. */
3314 if (PL_compcv &&
fbc891ce
RB
3315 /* If we request a version >= 5.9.5, load feature.pm with the
3316 * feature bundle that corresponds to the required version. */
2e8342de 3317 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3318 SV *const importsv = vnormal(sv);
3319 *SvPVX_mutable(importsv) = ':';
d343c3ef 3320 ENTER_with_name("load_feature");
7dfde25d 3321 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
d343c3ef 3322 LEAVE_with_name("load_feature");
7dfde25d 3323 }
53eb19dd
SM
3324 /* If a version >= 5.11.0 is requested, strictures are on by default! */
3325 if (PL_compcv &&
3326 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.011000), FALSE))) >= 0) {
5cc917d6 3327 PL_hints |= (HINT_STRICT_REFS | HINT_STRICT_SUBS | HINT_STRICT_VARS);
53eb19dd
SM
3328 }
3329
7dfde25d 3330 RETPUSHYES;
a0d0e21e 3331 }
5c144d81 3332 name = SvPV_const(sv, len);
6132ea6c 3333 if (!(name && len > 0 && *name))
cea2e8a9 3334 DIE(aTHX_ "Null filename used");
4633a7c4 3335 TAINT_PROPER("require");
4492be7a
JM
3336
3337
3338#ifdef VMS
3339 /* The key in the %ENV hash is in the syntax of file passed as the argument
3340 * usually this is in UNIX format, but sometimes in VMS format, which
3341 * can result in a module being pulled in more than once.
3342 * To prevent this, the key must be stored in UNIX format if the VMS
3343 * name can be translated to UNIX.
3344 */
3345 if ((unixname = tounixspec(name, NULL)) != NULL) {
3346 unixlen = strlen(unixname);
3347 vms_unixname = 1;
3348 }
3349 else
3350#endif
3351 {
3352 /* if not VMS or VMS name can not be translated to UNIX, pass it
3353 * through.
3354 */
3355 unixname = (char *) name;
3356 unixlen = len;
3357 }
44f8325f 3358 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM
3359 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3360 unixname, unixlen, 0);
44f8325f
AL
3361 if ( svp ) {
3362 if (*svp != &PL_sv_undef)
3363 RETPUSHYES;
3364 else
087b5369
RD
3365 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3366 "Compilation failed in require", unixname);
44f8325f 3367 }
4d8b06f1 3368 }
a0d0e21e
LW
3369
3370 /* prepare to compile file */
3371
be4b629d 3372 if (path_is_absolute(name)) {
46fc3d4c 3373 tryname = name;
0786552a 3374 tryrsfp = doopen_pm(name, len);
bf4acbe4 3375 }
be4b629d 3376