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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. */
158 OP *matchop = pm->op_next;
159 SV *lhs;
160 const bool was_tainted = PL_tainted;
161 if (matchop->op_flags & OPf_STACKED)
162 lhs = TOPs;
163 else if (matchop->op_private & OPpTARGET_MY)
164 lhs = PAD_SV(matchop->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
f0826785 172 re = reg_temp_copy(NULL, re);
aaa362c4 173 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 174 PM_SETRE(pm, re);
c277df42
IZ
175 }
176 else {
e62f0680 177 STRLEN len;
3ab4a224 178 const char *t = SvOK(tmpstr) ? SvPV_const(tmpstr, len) : "";
c737faaf 179 re = PM_GETRE(pm);
14a49a24 180 assert (re != (REGEXP*) &PL_sv_undef);
c277df42 181
20408e3c 182 /* Check against the last compiled regexp. */
a11c8683 183 if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
220fc49f 184 memNE(RX_PRECOMP(re), t, len))
85aff577 185 {
07bc277f 186 const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
c737faaf 187 U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME;
d8f6592e
AL
188 if (re) {
189 ReREFCNT_dec(re);
14a49a24
NC
190#ifdef USE_ITHREADS
191 PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
192#else
4608196e 193 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
14a49a24 194#endif
1e2e3d02
YO
195 } else if (PL_curcop->cop_hints_hash) {
196 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
197 "regcomp", 7, 0, 0);
198 if (ptr && SvIOK(ptr) && SvIV(ptr))
199 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 200 }
664e119d 201
533c011a 202 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 203 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 204
b9ad30b4
NC
205 if (DO_UTF8(tmpstr)) {
206 assert (SvUTF8(tmpstr));
207 } else if (SvUTF8(tmpstr)) {
208 /* Not doing UTF-8, despite what the SV says. Is this only if
209 we're trapped in use 'bytes'? */
210 /* Make a copy of the octet sequence, but without the flag on,
211 as the compiler now honours the SvUTF8 flag on tmpstr. */
212 STRLEN len;
213 const char *const p = SvPV(tmpstr, len);
214 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
215 }
c737faaf 216
3ab4a224
AB
217 if (eng)
218 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
219 else
220 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 221
f86aaa29 222 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 223 inside tie/overload accessors. */
c277df42 224 }
4633a7c4 225 }
c737faaf
YO
226
227 re = PM_GETRE(pm);
a0d0e21e 228
72311751 229#ifndef INCOMPLETE_TAINTS
3280af22
NIS
230 if (PL_tainting) {
231 if (PL_tainted)
07bc277f 232 RX_EXTFLAGS(re) |= RXf_TAINTED;
72311751 233 else
07bc277f 234 RX_EXTFLAGS(re) &= ~RXf_TAINTED;
72311751
GS
235 }
236#endif
237
220fc49f 238 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 239 pm = PL_curpm;
a0d0e21e 240
c737faaf
YO
241
242#if !defined(USE_ITHREADS)
243 /* can't change the optree at runtime either */
244 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 245 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 246 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 247 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 248 }
c737faaf 249#endif
a0d0e21e
LW
250 RETURN;
251}
252
253PP(pp_substcont)
254{
97aff369 255 dVAR;
39644a26 256 dSP;
c09156bb 257 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
258 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
259 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
260 register char *s = cx->sb_s;
261 register char *m = cx->sb_m;
262 char *orig = cx->sb_orig;
901017d6 263 register REGEXP * const rx = cx->sb_rx;
c445ea15 264 SV *nsv = NULL;
988e6e7e
AE
265 REGEXP *old = PM_GETRE(pm);
266 if(old != rx) {
bfed75c6 267 if(old)
988e6e7e 268 ReREFCNT_dec(old);
d6106309 269 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
270 }
271
d9f97599 272 rxres_restore(&cx->sb_rxres, rx);
01b35787 273 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 274
a0d0e21e 275 if (cx->sb_iters++) {
a3b680e6 276 const I32 saviters = cx->sb_iters;
a0d0e21e 277 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 278 DIE(aTHX_ "Substitution loop");
a0d0e21e 279
48c036b1
GS
280 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
281 cx->sb_rxtainted |= 2;
a0d0e21e 282 sv_catsv(dstr, POPs);
2c296965
YO
283 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
284 s -= RX_GOFS(rx);
a0d0e21e
LW
285
286 /* Are we done */
2c296965
YO
287 if (CxONCE(cx) || s < orig ||
288 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
289 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
290 ((cx->sb_rflags & REXEC_COPY_STR)
291 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
292 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 293 {
823a54a3 294 SV * const targ = cx->sb_targ;
748a9306 295
078c425b
JH
296 assert(cx->sb_strend >= s);
297 if(cx->sb_strend > s) {
298 if (DO_UTF8(dstr) && !SvUTF8(targ))
299 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
300 else
301 sv_catpvn(dstr, s, cx->sb_strend - s);
302 }
48c036b1 303 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 304
f8c7b90f 305#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
306 if (SvIsCOW(targ)) {
307 sv_force_normal_flags(targ, SV_COW_DROP_PV);
308 } else
309#endif
310 {
8bd4d4c5 311 SvPV_free(targ);
ed252734 312 }
f880fe2f 313 SvPV_set(targ, SvPVX(dstr));
748a9306
LW
314 SvCUR_set(targ, SvCUR(dstr));
315 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH
316 if (DO_UTF8(dstr))
317 SvUTF8_on(targ);
6136c704 318 SvPV_set(dstr, NULL);
48c036b1
GS
319
320 TAINT_IF(cx->sb_rxtainted & 1);
6e449a3a 321 mPUSHi(saviters - 1);
48c036b1 322
ffc61ed2 323 (void)SvPOK_only_UTF8(targ);
48c036b1 324 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 325 SvSETMAGIC(targ);
9212bbba 326 SvTAINT(targ);
5cd24f17 327
4633a7c4 328 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
329 POPSUBST(cx);
330 RETURNOP(pm->op_next);
331 }
8e5e9ebe 332 cx->sb_iters = saviters;
a0d0e21e 333 }
07bc277f 334 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
335 m = s;
336 s = orig;
07bc277f 337 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
338 s = orig + (m - s);
339 cx->sb_strend = s + (cx->sb_strend - m);
340 }
07bc277f 341 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 342 if (m > s) {
bfed75c6 343 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
344 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
345 else
346 sv_catpvn(dstr, s, m-s);
347 }
07bc277f 348 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 349 { /* Update the pos() information. */
44f8325f 350 SV * const sv = cx->sb_targ;
084916e3 351 MAGIC *mg;
7a7f3e45 352 SvUPGRADE(sv, SVt_PVMG);
14befaf4 353 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 354#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 355 if (SvIsCOW(sv))
d83f0a82
NC
356 sv_force_normal_flags(sv, 0);
357#endif
358 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
359 NULL, 0);
084916e3 360 }
ce474962 361 mg->mg_len = m - orig;
084916e3 362 }
988e6e7e 363 if (old != rx)
d6106309 364 (void)ReREFCNT_inc(rx);
d9f97599
GS
365 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
366 rxres_save(&cx->sb_rxres, rx);
29f2e912 367 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
368}
369
c90c0ff4 370void
864dbfa3 371Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
372{
373 UV *p = (UV*)*rsp;
374 U32 i;
7918f24d
NC
375
376 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 377 PERL_UNUSED_CONTEXT;
c90c0ff4 378
07bc277f 379 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 380#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 381 i = 7 + RX_NPARENS(rx) * 2;
ed252734 382#else
07bc277f 383 i = 6 + RX_NPARENS(rx) * 2;
ed252734 384#endif
c90c0ff4 385 if (!p)
a02a5408 386 Newx(p, i, UV);
c90c0ff4
PP
387 else
388 Renew(p, i, UV);
389 *rsp = (void*)p;
390 }
391
07bc277f 392 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 393 RX_MATCH_COPIED_off(rx);
c90c0ff4 394
f8c7b90f 395#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
396 *p++ = PTR2UV(RX_SAVED_COPY(rx));
397 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
398#endif
399
07bc277f 400 *p++ = RX_NPARENS(rx);
c90c0ff4 401
07bc277f
NC
402 *p++ = PTR2UV(RX_SUBBEG(rx));
403 *p++ = (UV)RX_SUBLEN(rx);
404 for (i = 0; i <= RX_NPARENS(rx); ++i) {
405 *p++ = (UV)RX_OFFS(rx)[i].start;
406 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
407 }
408}
409
9c105995
NC
410static void
411S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
412{
413 UV *p = (UV*)*rsp;
414 U32 i;
7918f24d
NC
415
416 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 417 PERL_UNUSED_CONTEXT;
c90c0ff4 418
ed252734 419 RX_MATCH_COPY_FREE(rx);
cf93c79d 420 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
421 *p++ = 0;
422
f8c7b90f 423#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
424 if (RX_SAVED_COPY(rx))
425 SvREFCNT_dec (RX_SAVED_COPY(rx));
426 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
427 *p++ = 0;
428#endif
429
07bc277f 430 RX_NPARENS(rx) = *p++;
c90c0ff4 431
07bc277f
NC
432 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
433 RX_SUBLEN(rx) = (I32)(*p++);
434 for (i = 0; i <= RX_NPARENS(rx); ++i) {
435 RX_OFFS(rx)[i].start = (I32)(*p++);
436 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
437 }
438}
439
9c105995
NC
440static void
441S_rxres_free(pTHX_ void **rsp)
c90c0ff4 442{
44f8325f 443 UV * const p = (UV*)*rsp;
7918f24d
NC
444
445 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 446 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
447
448 if (p) {
94010e71
NC
449#ifdef PERL_POISON
450 void *tmp = INT2PTR(char*,*p);
451 Safefree(tmp);
452 if (*p)
7e337ee0 453 PoisonFree(*p, 1, sizeof(*p));
94010e71 454#else
56431972 455 Safefree(INT2PTR(char*,*p));
94010e71 456#endif
f8c7b90f 457#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
458 if (p[1]) {
459 SvREFCNT_dec (INT2PTR(SV*,p[1]));
460 }
461#endif
c90c0ff4 462 Safefree(p);
4608196e 463 *rsp = NULL;
c90c0ff4
PP
464 }
465}
466
a0d0e21e
LW
467PP(pp_formline)
468{
97aff369 469 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 470 register SV * const tmpForm = *++MARK;
dea28490 471 register U32 *fpc;
a0d0e21e 472 register char *t;
245d4a47 473 const char *f;
a0d0e21e 474 register I32 arg;
c445ea15
AL
475 register SV *sv = NULL;
476 const char *item = NULL;
9c5ffd7c
JH
477 I32 itemsize = 0;
478 I32 fieldsize = 0;
a0d0e21e 479 I32 lines = 0;
c445ea15
AL
480 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
481 const char *chophere = NULL;
482 char *linemark = NULL;
65202027 483 NV value;
9c5ffd7c 484 bool gotsome = FALSE;
a0d0e21e 485 STRLEN len;
823a54a3 486 const STRLEN fudge = SvPOK(tmpForm)
24c89738 487 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
488 bool item_is_utf8 = FALSE;
489 bool targ_is_utf8 = FALSE;
c445ea15 490 SV * nsv = NULL;
cbbf8932 491 OP * parseres = NULL;
bfed75c6 492 const char *fmt;
a0d0e21e 493
76e3520e 494 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
495 if (SvREADONLY(tmpForm)) {
496 SvREADONLY_off(tmpForm);
a1b95068 497 parseres = doparseform(tmpForm);
445b3f51
GS
498 SvREADONLY_on(tmpForm);
499 }
500 else
a1b95068
LW
501 parseres = doparseform(tmpForm);
502 if (parseres)
503 return parseres;
a0d0e21e 504 }
3280af22 505 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
506 if (DO_UTF8(PL_formtarget))
507 targ_is_utf8 = TRUE;
a0ed51b3 508 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 509 t += len;
245d4a47 510 f = SvPV_const(tmpForm, len);
a0d0e21e 511 /* need to jump to the next word */
245d4a47 512 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
513
514 for (;;) {
515 DEBUG_f( {
bfed75c6 516 const char *name = "???";
a0d0e21e
LW
517 arg = -1;
518 switch (*fpc) {
519 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
520 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
521 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
522 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
523 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
524
525 case FF_CHECKNL: name = "CHECKNL"; break;
526 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
527 case FF_SPACE: name = "SPACE"; break;
528 case FF_HALFSPACE: name = "HALFSPACE"; break;
529 case FF_ITEM: name = "ITEM"; break;
530 case FF_CHOP: name = "CHOP"; break;
531 case FF_LINEGLOB: name = "LINEGLOB"; break;
532 case FF_NEWLINE: name = "NEWLINE"; break;
533 case FF_MORE: name = "MORE"; break;
534 case FF_LINEMARK: name = "LINEMARK"; break;
535 case FF_END: name = "END"; break;
bfed75c6 536 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 537 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
538 }
539 if (arg >= 0)
bf49b057 540 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 541 else
bf49b057 542 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 543 } );
a0d0e21e
LW
544 switch (*fpc++) {
545 case FF_LINEMARK:
546 linemark = t;
a0d0e21e
LW
547 lines++;
548 gotsome = FALSE;
549 break;
550
551 case FF_LITERAL:
552 arg = *fpc++;
1bd51a4c 553 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 554 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
555 *t = '\0';
556 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
557 t = SvEND(PL_formtarget);
f3f2f1a3 558 f += arg;
1bd51a4c
IH
559 break;
560 }
561 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 562 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c 563 *t = '\0';
7bf79863 564 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC, fudge + 1);
1bd51a4c
IH
565 t = SvEND(PL_formtarget);
566 targ_is_utf8 = TRUE;
567 }
a0d0e21e
LW
568 while (arg--)
569 *t++ = *f++;
570 break;
571
572 case FF_SKIP:
573 f += *fpc++;
574 break;
575
576 case FF_FETCH:
577 arg = *fpc++;
578 f += arg;
579 fieldsize = arg;
580
581 if (MARK < SP)
582 sv = *++MARK;
583 else {
3280af22 584 sv = &PL_sv_no;
a2a5de95 585 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
586 }
587 break;
588
589 case FF_CHECKNL:
5a34cab7
NC
590 {
591 const char *send;
592 const char *s = item = SvPV_const(sv, len);
593 itemsize = len;
594 if (DO_UTF8(sv)) {
595 itemsize = sv_len_utf8(sv);
596 if (itemsize != (I32)len) {
597 I32 itembytes;
598 if (itemsize > fieldsize) {
599 itemsize = fieldsize;
600 itembytes = itemsize;
601 sv_pos_u2b(sv, &itembytes, 0);
602 }
603 else
604 itembytes = len;
605 send = chophere = s + itembytes;
606 while (s < send) {
607 if (*s & ~31)
608 gotsome = TRUE;
609 else if (*s == '\n')
610 break;
611 s++;
612 }
613 item_is_utf8 = TRUE;
614 itemsize = s - item;
615 sv_pos_b2u(sv, &itemsize);
616 break;
a0ed51b3 617 }
a0ed51b3 618 }
5a34cab7
NC
619 item_is_utf8 = FALSE;
620 if (itemsize > fieldsize)
621 itemsize = fieldsize;
622 send = chophere = s + itemsize;
623 while (s < send) {
624 if (*s & ~31)
625 gotsome = TRUE;
626 else if (*s == '\n')
627 break;
628 s++;
629 }
630 itemsize = s - item;
631 break;
a0ed51b3 632 }
a0d0e21e
LW
633
634 case FF_CHECKCHOP:
5a34cab7
NC
635 {
636 const char *s = item = SvPV_const(sv, len);
637 itemsize = len;
638 if (DO_UTF8(sv)) {
639 itemsize = sv_len_utf8(sv);
640 if (itemsize != (I32)len) {
641 I32 itembytes;
642 if (itemsize <= fieldsize) {
643 const char *send = chophere = s + itemsize;
644 while (s < send) {
645 if (*s == '\r') {
646 itemsize = s - item;
a0ed51b3 647 chophere = s;
a0ed51b3 648 break;
5a34cab7
NC
649 }
650 if (*s++ & ~31)
a0ed51b3 651 gotsome = TRUE;
a0ed51b3 652 }
a0ed51b3 653 }
5a34cab7
NC
654 else {
655 const char *send;
656 itemsize = fieldsize;
657 itembytes = itemsize;
658 sv_pos_u2b(sv, &itembytes, 0);
659 send = chophere = s + itembytes;
660 while (s < send || (s == send && isSPACE(*s))) {
661 if (isSPACE(*s)) {
662 if (chopspace)
663 chophere = s;
664 if (*s == '\r')
665 break;
666 }
667 else {
668 if (*s & ~31)
669 gotsome = TRUE;
670 if (strchr(PL_chopset, *s))
671 chophere = s + 1;
672 }
673 s++;
674 }
675 itemsize = chophere - item;
676 sv_pos_b2u(sv, &itemsize);
677 }
678 item_is_utf8 = TRUE;
a0d0e21e
LW
679 break;
680 }
a0d0e21e 681 }
5a34cab7
NC
682 item_is_utf8 = FALSE;
683 if (itemsize <= fieldsize) {
684 const char *const send = chophere = s + itemsize;
685 while (s < send) {
686 if (*s == '\r') {
687 itemsize = s - item;
a0d0e21e 688 chophere = s;
a0d0e21e 689 break;
5a34cab7
NC
690 }
691 if (*s++ & ~31)
a0d0e21e 692 gotsome = TRUE;
a0d0e21e 693 }
a0d0e21e 694 }
5a34cab7
NC
695 else {
696 const char *send;
697 itemsize = fieldsize;
698 send = chophere = s + itemsize;
699 while (s < send || (s == send && isSPACE(*s))) {
700 if (isSPACE(*s)) {
701 if (chopspace)
702 chophere = s;
703 if (*s == '\r')
704 break;
705 }
706 else {
707 if (*s & ~31)
708 gotsome = TRUE;
709 if (strchr(PL_chopset, *s))
710 chophere = s + 1;
711 }
712 s++;
713 }
714 itemsize = chophere - item;
715 }
716 break;
a0d0e21e 717 }
a0d0e21e
LW
718
719 case FF_SPACE:
720 arg = fieldsize - itemsize;
721 if (arg) {
722 fieldsize -= arg;
723 while (arg-- > 0)
724 *t++ = ' ';
725 }
726 break;
727
728 case FF_HALFSPACE:
729 arg = fieldsize - itemsize;
730 if (arg) {
731 arg /= 2;
732 fieldsize -= arg;
733 while (arg-- > 0)
734 *t++ = ' ';
735 }
736 break;
737
738 case FF_ITEM:
5a34cab7
NC
739 {
740 const char *s = item;
741 arg = itemsize;
742 if (item_is_utf8) {
743 if (!targ_is_utf8) {
744 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
745 *t = '\0';
7bf79863
KW
746 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC,
747 fudge + 1);
5a34cab7
NC
748 t = SvEND(PL_formtarget);
749 targ_is_utf8 = TRUE;
a0ed51b3 750 }
5a34cab7
NC
751 while (arg--) {
752 if (UTF8_IS_CONTINUED(*s)) {
753 STRLEN skip = UTF8SKIP(s);
754 switch (skip) {
755 default:
756 Move(s,t,skip,char);
757 s += skip;
758 t += skip;
759 break;
760 case 7: *t++ = *s++;
761 case 6: *t++ = *s++;
762 case 5: *t++ = *s++;
763 case 4: *t++ = *s++;
764 case 3: *t++ = *s++;
765 case 2: *t++ = *s++;
766 case 1: *t++ = *s++;
767 }
768 }
769 else {
770 if ( !((*t++ = *s++) & ~31) )
771 t[-1] = ' ';
772 }
a0ed51b3 773 }
5a34cab7 774 break;
a0ed51b3 775 }
5a34cab7
NC
776 if (targ_is_utf8 && !item_is_utf8) {
777 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
778 *t = '\0';
779 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
780 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 781#ifdef EBCDIC
901017d6 782 const int ch = *t;
5a34cab7 783 if (iscntrl(ch))
78da4d13 784#else
5a34cab7 785 if (!(*t & ~31))
78da4d13 786#endif
5a34cab7
NC
787 *t = ' ';
788 }
789 break;
78da4d13 790 }
5a34cab7 791 while (arg--) {
9d116dd7 792#ifdef EBCDIC
901017d6 793 const int ch = *t++ = *s++;
5a34cab7 794 if (iscntrl(ch))
a0d0e21e 795#else
5a34cab7 796 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 797#endif
5a34cab7
NC
798 t[-1] = ' ';
799 }
800 break;
a0d0e21e 801 }
a0d0e21e
LW
802
803 case FF_CHOP:
5a34cab7
NC
804 {
805 const char *s = chophere;
806 if (chopspace) {
af68e756 807 while (isSPACE(*s))
5a34cab7
NC
808 s++;
809 }
810 sv_chop(sv,s);
811 SvSETMAGIC(sv);
812 break;
a0d0e21e 813 }
a0d0e21e 814
a1b95068
LW
815 case FF_LINESNGL:
816 chopspace = 0;
a0d0e21e 817 case FF_LINEGLOB:
5a34cab7 818 {
e32383e2 819 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 820 const char *s = item = SvPV_const(sv, len);
f3f2f1a3 821 item_is_utf8 = DO_UTF8(sv);
5a34cab7 822 itemsize = len;
5a34cab7 823 if (itemsize) {
e8e72d41 824 STRLEN to_copy = itemsize;
5a34cab7 825 const char *const send = s + len;
35c6393c 826 const U8 *source = (const U8 *) s;
e8e72d41
NC
827 U8 *tmp = NULL;
828
5a34cab7
NC
829 gotsome = TRUE;
830 chophere = s + itemsize;
831 while (s < send) {
832 if (*s++ == '\n') {
833 if (oneline) {
e8e72d41 834 to_copy = s - SvPVX_const(sv) - 1;
5a34cab7
NC
835 chophere = s;
836 break;
837 } else {
838 if (s == send) {
839 itemsize--;
e8e72d41 840 to_copy--;
5a34cab7
NC
841 } else
842 lines++;
843 }
1bd51a4c 844 }
a0d0e21e 845 }
e8e72d41 846 if (targ_is_utf8 && !item_is_utf8) {
35c6393c 847 source = tmp = bytes_to_utf8(source, &to_copy);
e8e72d41
NC
848 SvCUR_set(PL_formtarget,
849 t - SvPVX_const(PL_formtarget));
850 } else {
851 if (item_is_utf8 && !targ_is_utf8) {
852 /* Upgrade targ to UTF8, and then we reduce it to
853 a problem we have a simple solution for. */
854 SvCUR_set(PL_formtarget,
855 t - SvPVX_const(PL_formtarget));
856 targ_is_utf8 = TRUE;
857 /* Don't need get magic. */
7bf79863 858 sv_utf8_upgrade_nomg(PL_formtarget);
e8e72d41
NC
859 } else {
860 SvCUR_set(PL_formtarget,
861 t - SvPVX_const(PL_formtarget));
862 }
e8e72d41
NC
863
864 /* Easy. They agree. */
865 assert (item_is_utf8 == targ_is_utf8);
866 }
867 SvGROW(PL_formtarget,
868 SvCUR(PL_formtarget) + to_copy + fudge + 1);
5a34cab7 869 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
e8e72d41
NC
870
871 Copy(source, t, to_copy, char);
872 t += to_copy;
873 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
f3f2f1a3 874 if (item_is_utf8) {
e8e72d41
NC
875 if (SvGMAGICAL(sv)) {
876 /* Mustn't call sv_pos_b2u() as it does a second
877 mg_get(). Is this a bug? Do we need a _flags()
878 variant? */
879 itemsize = utf8_length(source, source + itemsize);
880 } else {
881 sv_pos_b2u(sv, &itemsize);
882 }
883 assert(!tmp);
884 } else if (tmp) {
885 Safefree(tmp);
f3f2f1a3 886 }
a0d0e21e 887 }
5a34cab7 888 break;
a0d0e21e 889 }
a0d0e21e 890
a1b95068
LW
891 case FF_0DECIMAL:
892 arg = *fpc++;
893#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
894 fmt = (const char *)
895 ((arg & 256) ?
896 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 897#else
10edeb5d
JH
898 fmt = (const char *)
899 ((arg & 256) ?
900 "%#0*.*f" : "%0*.*f");
a1b95068
LW
901#endif
902 goto ff_dec;
a0d0e21e 903 case FF_DECIMAL:
a0d0e21e 904 arg = *fpc++;
65202027 905#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
906 fmt = (const char *)
907 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 908#else
10edeb5d
JH
909 fmt = (const char *)
910 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 911#endif
a1b95068 912 ff_dec:
784707d5
JP
913 /* If the field is marked with ^ and the value is undefined,
914 blank it out. */
784707d5
JP
915 if ((arg & 512) && !SvOK(sv)) {
916 arg = fieldsize;
917 while (arg--)
918 *t++ = ' ';
919 break;
920 }
921 gotsome = TRUE;
922 value = SvNV(sv);
a1b95068 923 /* overflow evidence */
bfed75c6 924 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
925 arg = fieldsize;
926 while (arg--)
927 *t++ = '#';
928 break;
929 }
784707d5
JP
930 /* Formats aren't yet marked for locales, so assume "yes". */
931 {
932 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 933 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
934 RESTORE_NUMERIC_STANDARD();
935 }
936 t += fieldsize;
937 break;
a1b95068 938
a0d0e21e
LW
939 case FF_NEWLINE:
940 f++;
941 while (t-- > linemark && *t == ' ') ;
942 t++;
943 *t++ = '\n';
944 break;
945
946 case FF_BLANK:
947 arg = *fpc++;
948 if (gotsome) {
949 if (arg) { /* repeat until fields exhausted? */
950 *t = '\0';
b15aece3 951 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 952 lines += FmLINES(PL_formtarget);
1bd51a4c
IH
953 if (targ_is_utf8)
954 SvUTF8_on(PL_formtarget);
3280af22 955 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
956 SP = ORIGMARK;
957 RETURNOP(cLISTOP->op_first);
958 }
959 }
960 else {
961 t = linemark;
962 lines--;
963 }
964 break;
965
966 case FF_MORE:
5a34cab7
NC
967 {
968 const char *s = chophere;
969 const char *send = item + len;
970 if (chopspace) {
af68e756 971 while (isSPACE(*s) && (s < send))
5a34cab7 972 s++;
a0d0e21e 973 }
5a34cab7
NC
974 if (s < send) {
975 char *s1;
976 arg = fieldsize - itemsize;
977 if (arg) {
978 fieldsize -= arg;
979 while (arg-- > 0)
980 *t++ = ' ';
981 }
982 s1 = t - 3;
983 if (strnEQ(s1," ",3)) {
984 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
985 s1--;
986 }
987 *s1++ = '.';
988 *s1++ = '.';
989 *s1++ = '.';
a0d0e21e 990 }
5a34cab7 991 break;
a0d0e21e 992 }
a0d0e21e
LW
993 case FF_END:
994 *t = '\0';
b15aece3 995 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
996 if (targ_is_utf8)
997 SvUTF8_on(PL_formtarget);
3280af22 998 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
999 SP = ORIGMARK;
1000 RETPUSHYES;
1001 }
1002 }
1003}
1004
1005PP(pp_grepstart)
1006{
27da23d5 1007 dVAR; dSP;
a0d0e21e
LW
1008 SV *src;
1009
3280af22 1010 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 1011 (void)POPMARK;
54310121 1012 if (GIMME_V == G_SCALAR)
6e449a3a 1013 mXPUSHi(0);
533c011a 1014 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 1015 }
3280af22 1016 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
1017 pp_pushmark(); /* push dst */
1018 pp_pushmark(); /* push src */
d343c3ef 1019 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW
1020
1021 SAVETMPS;
59f00321
RGS
1022 if (PL_op->op_private & OPpGREP_LEX)
1023 SAVESPTR(PAD_SVl(PL_op->op_targ));
1024 else
1025 SAVE_DEFSV;
d343c3ef 1026 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1027 SAVEVPTR(PL_curpm);
a0d0e21e 1028
3280af22 1029 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 1030 SvTEMP_off(src);
59f00321
RGS
1031 if (PL_op->op_private & OPpGREP_LEX)
1032 PAD_SVl(PL_op->op_targ) = src;
1033 else
414bf5ae 1034 DEFSV_set(src);
a0d0e21e
LW
1035
1036 PUTBACK;
533c011a 1037 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 1038 pp_pushmark(); /* push top */
533c011a 1039 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
1040}
1041
a0d0e21e
LW
1042PP(pp_mapwhile)
1043{
27da23d5 1044 dVAR; dSP;
f54cb97a 1045 const I32 gimme = GIMME_V;
544f3153 1046 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
1047 I32 count;
1048 I32 shift;
1049 SV** src;
ac27b0f5 1050 SV** dst;
a0d0e21e 1051
544f3153 1052 /* first, move source pointer to the next item in the source list */
3280af22 1053 ++PL_markstack_ptr[-1];
544f3153
GS
1054
1055 /* if there are new items, push them into the destination list */
4c90a460 1056 if (items && gimme != G_VOID) {
544f3153
GS
1057 /* might need to make room back there first */
1058 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1059 /* XXX this implementation is very pessimal because the stack
1060 * is repeatedly extended for every set of items. Is possible
1061 * to do this without any stack extension or copying at all
1062 * by maintaining a separate list over which the map iterates
18ef8bea 1063 * (like foreach does). --gsar */
544f3153
GS
1064
1065 /* everything in the stack after the destination list moves
1066 * towards the end the stack by the amount of room needed */
1067 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1068
1069 /* items to shift up (accounting for the moved source pointer) */
1070 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
1071
1072 /* This optimization is by Ben Tilly and it does
1073 * things differently from what Sarathy (gsar)
1074 * is describing. The downside of this optimization is
1075 * that leaves "holes" (uninitialized and hopefully unused areas)
1076 * to the Perl stack, but on the other hand this
1077 * shouldn't be a problem. If Sarathy's idea gets
1078 * implemented, this optimization should become
1079 * irrelevant. --jhi */
1080 if (shift < count)
1081 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1082
924508f0
GS
1083 EXTEND(SP,shift);
1084 src = SP;
1085 dst = (SP += shift);
3280af22
NIS
1086 PL_markstack_ptr[-1] += shift;
1087 *PL_markstack_ptr += shift;
544f3153 1088 while (count--)
a0d0e21e
LW
1089 *dst-- = *src--;
1090 }
544f3153 1091 /* copy the new items down to the destination list */
ac27b0f5 1092 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
1093 if (gimme == G_ARRAY) {
1094 while (items-- > 0)
1095 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1096 }
bfed75c6 1097 else {
22023b26
TP
1098 /* scalar context: we don't care about which values map returns
1099 * (we use undef here). And so we certainly don't want to do mortal
1100 * copies of meaningless values. */
1101 while (items-- > 0) {
b988aa42 1102 (void)POPs;
22023b26
TP
1103 *dst-- = &PL_sv_undef;
1104 }
1105 }
a0d0e21e 1106 }
d343c3ef 1107 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW
1108
1109 /* All done yet? */
3280af22 1110 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1111
1112 (void)POPMARK; /* pop top */
d343c3ef 1113 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1114 (void)POPMARK; /* pop src */
3280af22 1115 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1116 (void)POPMARK; /* pop dst */
3280af22 1117 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1118 if (gimme == G_SCALAR) {
7cc47870
RGS
1119 if (PL_op->op_private & OPpGREP_LEX) {
1120 SV* sv = sv_newmortal();
1121 sv_setiv(sv, items);
1122 PUSHs(sv);
1123 }
1124 else {
1125 dTARGET;
1126 XPUSHi(items);
1127 }
a0d0e21e 1128 }
54310121
PP
1129 else if (gimme == G_ARRAY)
1130 SP += items;
a0d0e21e
LW
1131 RETURN;
1132 }
1133 else {
1134 SV *src;
1135
d343c3ef 1136 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1137 SAVEVPTR(PL_curpm);
a0d0e21e 1138
544f3153 1139 /* set $_ to the new source item */
3280af22 1140 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1141 SvTEMP_off(src);
59f00321
RGS
1142 if (PL_op->op_private & OPpGREP_LEX)
1143 PAD_SVl(PL_op->op_targ) = src;
1144 else
414bf5ae 1145 DEFSV_set(src);
a0d0e21e
LW
1146
1147 RETURNOP(cLOGOP->op_other);
1148 }
1149}
1150
a0d0e21e
LW
1151/* Range stuff. */
1152
1153PP(pp_range)
1154{
97aff369 1155 dVAR;
a0d0e21e 1156 if (GIMME == G_ARRAY)
1a67a97c 1157 return NORMAL;
538573f7 1158 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1159 return cLOGOP->op_other;
538573f7 1160 else
1a67a97c 1161 return NORMAL;
a0d0e21e
LW
1162}
1163
1164PP(pp_flip)
1165{
97aff369 1166 dVAR;
39644a26 1167 dSP;
a0d0e21e
LW
1168
1169 if (GIMME == G_ARRAY) {
1a67a97c 1170 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1171 }
1172 else {
1173 dTOPss;
44f8325f 1174 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1175 int flip = 0;
790090df 1176
bfed75c6 1177 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1178 if (GvIO(PL_last_in_gv)) {
1179 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1180 }
1181 else {
fafc274c 1182 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1183 if (gv && GvSV(gv))
1184 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1185 }
bfed75c6
AL
1186 } else {
1187 flip = SvTRUE(sv);
1188 }
1189 if (flip) {
a0d0e21e 1190 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1191 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1192 sv_setiv(targ, 1);
3e3baf6d 1193 SETs(targ);
a0d0e21e
LW
1194 RETURN;
1195 }
1196 else {
1197 sv_setiv(targ, 0);
924508f0 1198 SP--;
1a67a97c 1199 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1200 }
1201 }
76f68e9b 1202 sv_setpvs(TARG, "");
a0d0e21e
LW
1203 SETs(targ);
1204 RETURN;
1205 }
1206}
1207
8e9bbdb9
RGS
1208/* This code tries to decide if "$left .. $right" should use the
1209 magical string increment, or if the range is numeric (we make
1210 an exception for .."0" [#18165]). AMS 20021031. */
1211
1212#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1213 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1214 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1215 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1216 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1217 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1218
a0d0e21e
LW
1219PP(pp_flop)
1220{
97aff369 1221 dVAR; dSP;
a0d0e21e
LW
1222
1223 if (GIMME == G_ARRAY) {
1224 dPOPPOPssrl;
86cb7173 1225
5b295bef
RD
1226 SvGETMAGIC(left);
1227 SvGETMAGIC(right);
a0d0e21e 1228
8e9bbdb9 1229 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1230 register IV i, j;
1231 IV max;
4fe3f0fa
MHM
1232 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1233 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1234 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1235 i = SvIV(left);
1236 max = SvIV(right);
bbce6d69 1237 if (max >= i) {
c1ab3db2
AK
1238 j = max - i + 1;
1239 EXTEND_MORTAL(j);
1240 EXTEND(SP, j);
bbce6d69 1241 }
c1ab3db2
AK
1242 else
1243 j = 0;
1244 while (j--) {
901017d6 1245 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1246 PUSHs(sv);
1247 }
1248 }
1249 else {
44f8325f 1250 SV * const final = sv_mortalcopy(right);
13c5b33c 1251 STRLEN len;
823a54a3 1252 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1253
901017d6 1254 SV *sv = sv_mortalcopy(left);
13c5b33c 1255 SvPV_force_nolen(sv);
89ea2908 1256 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1257 XPUSHs(sv);
b15aece3 1258 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1259 break;
a0d0e21e
LW
1260 sv = sv_2mortal(newSVsv(sv));
1261 sv_inc(sv);
1262 }
a0d0e21e
LW
1263 }
1264 }
1265 else {
1266 dTOPss;
901017d6 1267 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1268 int flop = 0;
a0d0e21e 1269 sv_inc(targ);
4e3399f9
YST
1270
1271 if (PL_op->op_private & OPpFLIP_LINENUM) {
1272 if (GvIO(PL_last_in_gv)) {
1273 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1274 }
1275 else {
fafc274c 1276 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1277 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1278 }
1279 }
1280 else {
1281 flop = SvTRUE(sv);
1282 }
1283
1284 if (flop) {
a0d0e21e 1285 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1286 sv_catpvs(targ, "E0");
a0d0e21e
LW
1287 }
1288 SETs(targ);
1289 }
1290
1291 RETURN;
1292}
1293
1294/* Control. */
1295
27da23d5 1296static const char * const context_name[] = {
515afda2 1297 "pseudo-block",
f31522f3 1298 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1299 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1300 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1301 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1302 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1303 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1304 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1305 "subroutine",
76753e7f 1306 "format",
515afda2 1307 "eval",
515afda2 1308 "substitution",
515afda2
NC
1309};
1310
76e3520e 1311STATIC I32
06b5626a 1312S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1313{
97aff369 1314 dVAR;
a0d0e21e 1315 register I32 i;
a0d0e21e 1316
7918f24d
NC
1317 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1318
a0d0e21e 1319 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1320 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1321 switch (CxTYPE(cx)) {
a0d0e21e 1322 case CXt_SUBST:
a0d0e21e 1323 case CXt_SUB:
7766f137 1324 case CXt_FORMAT:
a0d0e21e 1325 case CXt_EVAL:
0a753a76 1326 case CXt_NULL:
a2a5de95
NC
1327 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1328 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1329 if (CxTYPE(cx) == CXt_NULL)
1330 return -1;
1331 break;
c6fdafd0 1332 case CXt_LOOP_LAZYIV:
d01136d6 1333 case CXt_LOOP_LAZYSV:
3b719c58
NC
1334 case CXt_LOOP_FOR:
1335 case CXt_LOOP_PLAIN:
7e8f1eac
AD
1336 {
1337 const char *cx_label = CxLABEL(cx);
1338 if (!cx_label || strNE(label, cx_label) ) {
cea2e8a9 1339 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
7e8f1eac 1340 (long)i, cx_label));
a0d0e21e
LW
1341 continue;
1342 }
cea2e8a9 1343 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e 1344 return i;
7e8f1eac 1345 }
a0d0e21e
LW
1346 }
1347 }
1348 return i;
1349}
1350
0d863452
RH
1351
1352
e50aee73 1353I32
864dbfa3 1354Perl_dowantarray(pTHX)
e50aee73 1355{
97aff369 1356 dVAR;
f54cb97a 1357 const I32 gimme = block_gimme();
54310121
PP
1358 return (gimme == G_VOID) ? G_SCALAR : gimme;
1359}
1360
1361I32
864dbfa3 1362Perl_block_gimme(pTHX)
54310121 1363{
97aff369 1364 dVAR;
06b5626a 1365 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1366 if (cxix < 0)
46fc3d4c 1367 return G_VOID;
e50aee73 1368
54310121 1369 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1370 case G_VOID:
1371 return G_VOID;
54310121 1372 case G_SCALAR:
e50aee73 1373 return G_SCALAR;
54310121
PP
1374 case G_ARRAY:
1375 return G_ARRAY;
1376 default:
cea2e8a9 1377 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1378 /* NOTREACHED */
1379 return 0;
54310121 1380 }
e50aee73
AD
1381}
1382
78f9721b
SM
1383I32
1384Perl_is_lvalue_sub(pTHX)
1385{
97aff369 1386 dVAR;
06b5626a 1387 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1388 assert(cxix >= 0); /* We should only be called from inside subs */
1389
bafb2adc
NC
1390 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1391 return CxLVAL(cxstack + cxix);
78f9721b
SM
1392 else
1393 return 0;
1394}
1395
76e3520e 1396STATIC I32
901017d6 1397S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1398{
97aff369 1399 dVAR;
a0d0e21e 1400 I32 i;
7918f24d
NC
1401
1402 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1403
a0d0e21e 1404 for (i = startingblock; i >= 0; i--) {
901017d6 1405 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1406 switch (CxTYPE(cx)) {
a0d0e21e
LW
1407 default:
1408 continue;
1409 case CXt_EVAL:
1410 case CXt_SUB:
7766f137 1411 case CXt_FORMAT:
cea2e8a9 1412 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1413 return i;
1414 }
1415 }
1416 return i;
1417}
1418
76e3520e 1419STATIC I32
cea2e8a9 1420S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1421{
97aff369 1422 dVAR;
a0d0e21e 1423 I32 i;
a0d0e21e 1424 for (i = startingblock; i >= 0; i--) {
06b5626a 1425 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1426 switch (CxTYPE(cx)) {
a0d0e21e
LW
1427 default:
1428 continue;
1429 case CXt_EVAL:
cea2e8a9 1430 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1431 return i;
1432 }
1433 }
1434 return i;
1435}
1436
76e3520e 1437STATIC I32
cea2e8a9 1438S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1439{
97aff369 1440 dVAR;
a0d0e21e 1441 I32 i;
a0d0e21e 1442 for (i = startingblock; i >= 0; i--) {
901017d6 1443 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1444 switch (CxTYPE(cx)) {
a0d0e21e 1445 case CXt_SUBST:
a0d0e21e 1446 case CXt_SUB:
7766f137 1447 case CXt_FORMAT:
a0d0e21e 1448 case CXt_EVAL:
0a753a76 1449 case CXt_NULL:
a2a5de95
NC
1450 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1451 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1452 if ((CxTYPE(cx)) == CXt_NULL)
1453 return -1;
1454 break;
c6fdafd0 1455 case CXt_LOOP_LAZYIV:
d01136d6 1456 case CXt_LOOP_LAZYSV:
3b719c58
NC
1457 case CXt_LOOP_FOR:
1458 case CXt_LOOP_PLAIN:
cea2e8a9 1459 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1460 return i;
1461 }
1462 }
1463 return i;
1464}
1465
0d863452
RH
1466STATIC I32
1467S_dopoptogiven(pTHX_ I32 startingblock)
1468{
97aff369 1469 dVAR;
0d863452
RH
1470 I32 i;
1471 for (i = startingblock; i >= 0; i--) {
1472 register const PERL_CONTEXT *cx = &cxstack[i];
1473 switch (CxTYPE(cx)) {
1474 default:
1475 continue;
1476 case CXt_GIVEN:
1477 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1478 return i;
3b719c58
NC
1479 case CXt_LOOP_PLAIN:
1480 assert(!CxFOREACHDEF(cx));
1481 break;
c6fdafd0 1482 case CXt_LOOP_LAZYIV:
d01136d6 1483 case CXt_LOOP_LAZYSV:
3b719c58 1484 case CXt_LOOP_FOR:
0d863452
RH
1485 if (CxFOREACHDEF(cx)) {
1486 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1487 return i;
1488 }
1489 }
1490 }
1491 return i;
1492}
1493
1494STATIC I32
1495S_dopoptowhen(pTHX_ I32 startingblock)
1496{
97aff369 1497 dVAR;
0d863452
RH
1498 I32 i;
1499 for (i = startingblock; i >= 0; i--) {
1500 register const PERL_CONTEXT *cx = &cxstack[i];
1501 switch (CxTYPE(cx)) {
1502 default:
1503 continue;
1504 case CXt_WHEN:
1505 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1506 return i;
1507 }
1508 }
1509 return i;
1510}
1511
a0d0e21e 1512void
864dbfa3 1513Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1514{
97aff369 1515 dVAR;
a0d0e21e
LW
1516 I32 optype;
1517
1518 while (cxstack_ix > cxix) {
b0d9ce38 1519 SV *sv;
06b5626a 1520 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1521 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1522 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1523 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1524 switch (CxTYPE(cx)) {
c90c0ff4
PP
1525 case CXt_SUBST:
1526 POPSUBST(cx);
1527 continue; /* not break */
a0d0e21e 1528 case CXt_SUB:
b0d9ce38
GS
1529 POPSUB(cx,sv);
1530 LEAVESUB(sv);
a0d0e21e
LW
1531 break;
1532 case CXt_EVAL:
1533 POPEVAL(cx);
1534 break;
c6fdafd0 1535 case CXt_LOOP_LAZYIV:
d01136d6 1536 case CXt_LOOP_LAZYSV:
3b719c58
NC
1537 case CXt_LOOP_FOR:
1538 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1539 POPLOOP(cx);
1540 break;
0a753a76 1541 case CXt_NULL:
a0d0e21e 1542 break;
7766f137
GS
1543 case CXt_FORMAT:
1544 POPFORMAT(cx);
1545 break;
a0d0e21e 1546 }
c90c0ff4 1547 cxstack_ix--;
a0d0e21e 1548 }
1b6737cc 1549 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1550}
1551
5a844595
GS
1552void
1553Perl_qerror(pTHX_ SV *err)
1554{
97aff369 1555 dVAR;
7918f24d
NC
1556
1557 PERL_ARGS_ASSERT_QERROR;
1558
5a844595
GS
1559 if (PL_in_eval)
1560 sv_catsv(ERRSV, err);
1561 else if (PL_errors)
1562 sv_catsv(PL_errors, err);
1563 else
be2597df 1564 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1565 if (PL_parser)
1566 ++PL_parser->error_count;
5a844595
GS
1567}
1568
bb4c52e0 1569void
7d0994e0 1570Perl_die_where(pTHX_ SV *msv)
a0d0e21e 1571{
27da23d5 1572 dVAR;
87582a92 1573
3280af22 1574 if (PL_in_eval) {
a0d0e21e 1575 I32 cxix;
a0d0e21e 1576 I32 gimme;
a0d0e21e 1577
7d0994e0 1578 if (msv) {
faef0170 1579 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1580 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1581 SV * const err = ERRSV;
c445ea15 1582 const char *e = NULL;
98eae8f5 1583 if (!SvPOK(err))
76f68e9b 1584 sv_setpvs(err,"");
7d0994e0 1585 else if (SvCUR(err) >= sizeof(prefix)+SvCUR(msv)-1) {
0510663f 1586 STRLEN len;
7d0994e0
GG
1587 STRLEN msglen;
1588 const char* message = SvPV_const(msv, msglen);
349d4f2f 1589 e = SvPV_const(err, len);
0510663f 1590 e += len - msglen;
98eae8f5 1591 if (*e != *message || strNE(e,message))
c445ea15 1592 e = NULL;
98eae8f5
GS
1593 }
1594 if (!e) {
a2a5de95 1595 STRLEN start;
7d0994e0 1596 SvGROW(err, SvCUR(err)+sizeof(prefix)+SvCUR(msv));
98eae8f5 1597 sv_catpvn(err, prefix, sizeof(prefix)-1);
7d0994e0
GG
1598 sv_catsv(err, msv);
1599 start = SvCUR(err)-SvCUR(msv)-sizeof(prefix)+1;
a2a5de95
NC
1600 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "%s",
1601 SvPVX_const(err)+start);
4633a7c4 1602 }
4633a7c4 1603 }
1aa99e6b 1604 else {
7d0994e0
GG
1605 STRLEN msglen;
1606 const char* message = SvPV_const(msv, msglen);
06bf62c7 1607 sv_setpvn(ERRSV, message, msglen);
7d0994e0 1608 SvFLAGS(ERRSV) |= SvFLAGS(msv) & SVf_UTF8;
1aa99e6b 1609 }
4633a7c4 1610 }
4e6ea2c3 1611
5a844595
GS
1612 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1613 && PL_curstackinfo->si_prev)
1614 {
bac4b2ad 1615 dounwind(-1);
d3acc0f7 1616 POPSTACK;
bac4b2ad 1617 }
e336de0d 1618
a0d0e21e
LW
1619 if (cxix >= 0) {
1620 I32 optype;
35a4481c 1621 register PERL_CONTEXT *cx;
901017d6 1622 SV **newsp;
a0d0e21e
LW
1623
1624 if (cxix < cxstack_ix)
1625 dounwind(cxix);
1626
3280af22 1627 POPBLOCK(cx,PL_curpm);
6b35e009 1628 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0
GG
1629 STRLEN msglen;
1630 const char* message = SvPVx_const( msv ? msv : ERRSV, msglen);
10edeb5d 1631 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1632 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1633 my_exit(1);
1634 }
1635 POPEVAL(cx);
1636
1637 if (gimme == G_SCALAR)
3280af22
NIS
1638 *++newsp = &PL_sv_undef;
1639 PL_stack_sp = newsp;
a0d0e21e
LW
1640
1641 LEAVE;
748a9306 1642
7fb6a879
GS
1643 /* LEAVE could clobber PL_curcop (see save_re_context())
1644 * XXX it might be better to find a way to avoid messing with
1645 * PL_curcop in save_re_context() instead, but this is a more
1646 * minimal fix --GSAR */
1647 PL_curcop = cx->blk_oldcop;
1648
7a2e2cd6 1649 if (optype == OP_REQUIRE) {
44f8325f 1650 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1651 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1652 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1653 &PL_sv_undef, 0);
5a844595
GS
1654 DIE(aTHX_ "%sCompilation failed in require",
1655 *msg ? msg : "Unknown error\n");
7a2e2cd6 1656 }
f39bc417 1657 assert(CxTYPE(cx) == CXt_EVAL);
bb4c52e0
GG
1658 PL_restartop = cx->blk_eval.retop;
1659 JMPENV_JUMP(3);
1660 /* NOTREACHED */
a0d0e21e
LW
1661 }
1662 }
87582a92 1663
7d0994e0 1664 write_to_stderr( msv ? msv : ERRSV );
f86702cc
PP
1665 my_failure_exit();
1666 /* NOTREACHED */
a0d0e21e
LW
1667}
1668
1669PP(pp_xor)
1670{
97aff369 1671 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1672 if (SvTRUE(left) != SvTRUE(right))
1673 RETSETYES;
1674 else
1675 RETSETNO;
1676}
1677
a0d0e21e
LW
1678PP(pp_caller)
1679{
97aff369 1680 dVAR;
39644a26 1681 dSP;
a0d0e21e 1682 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1683 register const PERL_CONTEXT *cx;
1684 register const PERL_CONTEXT *ccstack = cxstack;
1685 const PERL_SI *top_si = PL_curstackinfo;
54310121 1686 I32 gimme;
06b5626a 1687 const char *stashname;
a0d0e21e
LW
1688 I32 count = 0;
1689
1690 if (MAXARG)
1691 count = POPi;
27d41816 1692
a0d0e21e 1693 for (;;) {
2c375eb9
GS
1694 /* we may be in a higher stacklevel, so dig down deeper */
1695 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1696 top_si = top_si->si_prev;
1697 ccstack = top_si->si_cxstack;
1698 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1699 }
a0d0e21e 1700 if (cxix < 0) {
27d41816
DM
1701 if (GIMME != G_ARRAY) {
1702 EXTEND(SP, 1);
a0d0e21e 1703 RETPUSHUNDEF;
27d41816 1704 }
a0d0e21e
LW
1705 RETURN;
1706 }
f2a7f298 1707 /* caller() should not report the automatic calls to &DB::sub */
1708 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1709 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1710 count++;
1711 if (!count--)
1712 break;
2c375eb9 1713 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1714 }
2c375eb9
GS
1715
1716 cx = &ccstack[cxix];
7766f137 1717 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1718 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1719 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1720 field below is defined for any cx. */
f2a7f298 1721 /* caller() should not report the automatic calls to &DB::sub */
1722 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1723 cx = &ccstack[dbcxix];
06a5b730
PP
1724 }
1725
ed094faf 1726 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1727 if (GIMME != G_ARRAY) {
27d41816 1728 EXTEND(SP, 1);
ed094faf 1729 if (!stashname)
3280af22 1730 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1731 else {
1732 dTARGET;
ed094faf 1733 sv_setpv(TARG, stashname);
49d8d3a1
MB
1734 PUSHs(TARG);
1735 }
a0d0e21e
LW
1736 RETURN;
1737 }
a0d0e21e 1738
b3ca2e83 1739 EXTEND(SP, 11);
27d41816 1740
ed094faf 1741 if (!stashname)
3280af22 1742 PUSHs(&PL_sv_undef);
49d8d3a1 1743 else
6e449a3a
MHM
1744 mPUSHs(newSVpv(stashname, 0));
1745 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1746 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW
1747 if (!MAXARG)
1748 RETURN;
7766f137 1749 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1750 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1751 /* So is ccstack[dbcxix]. */
07b8c804 1752 if (isGV(cvgv)) {
561b68a9 1753 SV * const sv = newSV(0);
c445ea15 1754 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1755 mPUSHs(sv);
bf38a478 1756 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1757 }
1758 else {
84bafc02 1759 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1760 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1761 }
a0d0e21e
LW
1762 }
1763 else {
84bafc02 1764 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1765 mPUSHi(0);
a0d0e21e 1766 }
54310121
PP
1767 gimme = (I32)cx->blk_gimme;
1768 if (gimme == G_VOID)
3280af22 1769 PUSHs(&PL_sv_undef);
54310121 1770 else
98625aca 1771 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1772 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1773 /* eval STRING */
85a64632 1774 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1775 PUSHs(cx->blk_eval.cur_text);
3280af22 1776 PUSHs(&PL_sv_no);
0f79a09d 1777 }
811a4de9 1778 /* require */
0f79a09d 1779 else if (cx->blk_eval.old_namesv) {
6e449a3a 1780 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1781 PUSHs(&PL_sv_yes);
06a5b730 1782 }
811a4de9
GS
1783 /* eval BLOCK (try blocks have old_namesv == 0) */
1784 else {
1785 PUSHs(&PL_sv_undef);
1786 PUSHs(&PL_sv_undef);
1787 }
4633a7c4 1788 }
a682de96
GS
1789 else {
1790 PUSHs(&PL_sv_undef);
1791 PUSHs(&PL_sv_undef);
1792 }
bafb2adc 1793 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1794 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1795 {
66a1b24b
AL
1796 AV * const ary = cx->blk_sub.argarray;
1797 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1798
3280af22 1799 if (!PL_dbargs) {
af3885a0
NC
1800 PL_dbargs = GvAV(gv_AVadd(gv_fetchpvs("DB::args", GV_ADDMULTI,
1801 SVt_PVAV)));
3ddcf04c 1802 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1803 }
1804
3280af22
NIS
1805 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1806 av_extend(PL_dbargs, AvFILLp(ary) + off);
1807 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1808 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1809 }
f3aa04c2
GS
1810 /* XXX only hints propagated via op_private are currently
1811 * visible (others are not easily accessible, since they
1812 * use the global PL_hints) */
6e449a3a 1813 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1814 {
1815 SV * mask ;
72dc9ed5 1816 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1817
ac27b0f5 1818 if (old_warnings == pWARN_NONE ||
114bafba 1819 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1820 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1821 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1822 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1823 /* Get the bit mask for $warnings::Bits{all}, because
1824 * it could have been extended by warnings::register */
1825 SV **bits_all;
6673a63c 1826 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1827 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1828 mask = newSVsv(*bits_all);
1829 }
1830 else {
1831 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1832 }
1833 }
e476b1b5 1834 else
72dc9ed5 1835 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1836 mPUSHs(mask);
e476b1b5 1837 }
b3ca2e83 1838
c28fe1ec 1839 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1840 sv_2mortal(newRV_noinc(
ad64d0ec
NC
1841 MUTABLE_SV(Perl_refcounted_he_chain_2hv(aTHX_
1842 cx->blk_oldcop->cop_hints_hash))))
b3ca2e83 1843 : &PL_sv_undef);
a0d0e21e
LW
1844 RETURN;
1845}
1846
a0d0e21e
LW
1847PP(pp_reset)
1848{
97aff369 1849 dVAR;
39644a26 1850 dSP;
10edeb5d 1851 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1852 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1853 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1854 RETURN;
1855}
1856
dd2155a4
DM
1857/* like pp_nextstate, but used instead when the debugger is active */
1858
a0d0e21e
LW
1859PP(pp_dbstate)
1860{
27da23d5 1861 dVAR;
533c011a 1862 PL_curcop = (COP*)PL_op;
a0d0e21e 1863 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1864 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1865 FREETMPS;
1866
5df8de69
DM
1867 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1868 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1869 {
39644a26 1870 dSP;
c09156bb 1871 register PERL_CONTEXT *cx;
f54cb97a 1872 const I32 gimme = G_ARRAY;
eb160463 1873 U8 hasargs;
0bd48802
AL
1874 GV * const gv = PL_DBgv;
1875 register CV * const cv = GvCV(gv);
a0d0e21e 1876
a0d0e21e 1877 if (!cv)
cea2e8a9 1878 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1879
aea4f609
DM
1880 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1881 /* don't do recursive DB::DB call */
a0d0e21e 1882 return NORMAL;
748a9306 1883
d343c3ef 1884 ENTER_with_name("sub");
4633a7c4
LW
1885 SAVETMPS;
1886
3280af22 1887 SAVEI32(PL_debug);
55497cff 1888 SAVESTACK_POS();
3280af22 1889 PL_debug = 0;
748a9306 1890 hasargs = 0;
924508f0 1891 SPAGAIN;
748a9306 1892
aed2304a 1893 if (CvISXSUB(cv)) {
c127bd3a
SF
1894 CvDEPTH(cv)++;
1895 PUSHMARK(SP);
1896 (void)(*CvXSUB(cv))(aTHX_ cv);
1897 CvDEPTH(cv)--;
1898 FREETMPS;
d343c3ef 1899 LEAVE_with_name("sub");
c127bd3a
SF
1900 return NORMAL;
1901 }
1902 else {
1903 PUSHBLOCK(cx, CXt_SUB, SP);
1904 PUSHSUB_DB(cx);
1905 cx->blk_sub.retop = PL_op->op_next;
1906 CvDEPTH(cv)++;
1907 SAVECOMPPAD();
1908 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1909 RETURNOP(CvSTART(cv));
1910 }
a0d0e21e
LW
1911 }
1912 else
1913 return NORMAL;
1914}
1915
a0d0e21e
LW
1916PP(pp_enteriter)
1917{
27da23d5 1918 dVAR; dSP; dMARK;
c09156bb 1919 register PERL_CONTEXT *cx;
f54cb97a 1920 const I32 gimme = GIMME_V;
a0d0e21e 1921 SV **svp;
840fe433 1922 U8 cxtype = CXt_LOOP_FOR;
7766f137 1923#ifdef USE_ITHREADS
e846cb92 1924 PAD *iterdata;
7766f137 1925#endif
a0d0e21e 1926
d343c3ef 1927 ENTER_with_name("loop1");
4633a7c4
LW
1928 SAVETMPS;
1929
533c011a 1930 if (PL_op->op_targ) {
14f338dc
DM
1931 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1932 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1933 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1934 SVs_PADSTALE, SVs_PADSTALE);
1935 }
09edbca0 1936 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
c3564e5c 1937#ifndef USE_ITHREADS
dd2155a4 1938 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
c3564e5c 1939#else
e846cb92 1940 iterdata = NULL;
7766f137 1941#endif
54b9620d
MB
1942 }
1943 else {
159b6efe 1944 GV * const gv = MUTABLE_GV(POPs);
7766f137 1945 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1946 SAVEGENERICSV(*svp);
561b68a9 1947 *svp = newSV(0);
7766f137 1948#ifdef USE_ITHREADS
e846cb92 1949 iterdata = (PAD*)gv;
7766f137 1950#endif
54b9620d 1951 }
4633a7c4 1952
0d863452
RH
1953 if (PL_op->op_private & OPpITER_DEF)
1954 cxtype |= CXp_FOR_DEF;
1955
d343c3ef 1956 ENTER_with_name("loop2");
a0d0e21e 1957
7766f137
GS
1958 PUSHBLOCK(cx, cxtype, SP);
1959#ifdef USE_ITHREADS
e846cb92 1960 PUSHLOOP_FOR(cx, iterdata, MARK, PL_op->op_targ);
7766f137 1961#else
52d1f6fb 1962 PUSHLOOP_FOR(cx, svp, MARK, 0);
7766f137 1963#endif
533c011a 1964 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
1965 SV *maybe_ary = POPs;
1966 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 1967 dPOPss;
d01136d6 1968 SV * const right = maybe_ary;
984a4bea
RD
1969 SvGETMAGIC(sv);
1970 SvGETMAGIC(right);
4fe3f0fa 1971 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 1972 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
1973 cx->cx_type |= CXt_LOOP_LAZYIV;
1974 /* Make sure that no-one re-orders cop.h and breaks our
1975 assumptions */
1976 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040
JH
1977#ifdef NV_PRESERVES_UV
1978 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1979 (SvNV(sv) > (NV)IV_MAX)))
1980 ||
1981 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1982 (SvNV(right) < (NV)IV_MIN))))
1983#else
1984 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1985 ||
1986 ((SvNV(sv) > 0) &&
1987 ((SvUV(sv) > (UV)IV_MAX) ||
1988 (SvNV(sv) > (NV)UV_MAX)))))
1989 ||
1990 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1991 ||
1992 ((SvNV(right) > 0) &&
1993 ((SvUV(right) > (UV)IV_MAX) ||
1994 (SvNV(right) > (NV)UV_MAX))))))
1995#endif
076d9a11 1996 DIE(aTHX_ "Range iterator outside integer range");
d01136d6
BS
1997 cx->blk_loop.state_u.lazyiv.cur = SvIV(sv);
1998 cx->blk_loop.state_u.lazyiv.end = SvIV(right);
d4665a05
DM
1999#ifdef DEBUGGING
2000 /* for correct -Dstv display */
2001 cx->blk_oldsp = sp - PL_stack_base;
2002#endif
89ea2908 2003 }
3f63a782 2004 else {
d01136d6
BS
2005 cx->cx_type &= ~CXTYPEMASK;
2006 cx->cx_type |= CXt_LOOP_LAZYSV;
2007 /* Make sure that no-one re-orders cop.h and breaks our
2008 assumptions */
2009 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2010 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2011 cx->blk_loop.state_u.lazysv.end = right;
2012 SvREFCNT_inc(right);
2013 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
2014 /* This will do the upgrade to SVt_PV, and warn if the value
2015 is uninitialised. */
10516c54 2016 (void) SvPV_nolen_const(right);
267cc4a8
NC
2017 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2018 to replace !SvOK() with a pointer to "". */
2019 if (!SvOK(right)) {
2020 SvREFCNT_dec(right);
d01136d6 2021 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2022 }
3f63a782 2023 }
89ea2908 2024 }
d01136d6 2025 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2026 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
2027 SvREFCNT_inc(maybe_ary);
2028 cx->blk_loop.state_u.ary.ix =
2029 (PL_op->op_private & OPpITER_REVERSED) ?
2030 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2031 -1;
ef3e5ea9 2032 }
89ea2908 2033 }
d01136d6
BS
2034 else { /* iterating over items on the stack */
2035 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2036 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2037 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
2038 }
2039 else {
d01136d6 2040 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2041 }
4633a7c4 2042 }
a0d0e21e
LW
2043
2044 RETURN;
2045}
2046
2047PP(pp_enterloop)
2048{
27da23d5 2049 dVAR; dSP;
c09156bb 2050 register PERL_CONTEXT *cx;
f54cb97a 2051 const I32 gimme = GIMME_V;
a0d0e21e 2052
d343c3ef 2053 ENTER_with_name("loop1");
a0d0e21e 2054 SAVETMPS;
d343c3ef 2055 ENTER_with_name("loop2");
a0d0e21e 2056
3b719c58
NC
2057 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2058 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2059
2060 RETURN;
2061}
2062
2063PP(pp_leaveloop)
2064{
27da23d5 2065 dVAR; dSP;
c09156bb 2066 register PERL_CONTEXT *cx;
a0d0e21e
LW
2067 I32 gimme;
2068 SV **newsp;
2069 PMOP *newpm;
2070 SV **mark;
2071
2072 POPBLOCK(cx,newpm);
3b719c58 2073 assert(CxTYPE_is_LOOP(cx));
4fdae800 2074 mark = newsp;
a8bba7fa 2075 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2076
a1f49e72 2077 TAINT_NOT;
54310121 2078 if (gimme == G_VOID)
6f207bd3 2079 NOOP;
54310121
PP
2080 else if (gimme == G_SCALAR) {
2081 if (mark < SP)
2082 *++newsp = sv_mortalcopy(*SP);
2083 else
3280af22 2084 *++newsp = &PL_sv_undef;
a0d0e21e
LW
2085 }
2086 else {
a1f49e72 2087 while (mark < SP) {
a0d0e21e 2088 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
2089 TAINT_NOT; /* Each item is independent */
2090 }
a0d0e21e 2091 }
f86702cc
PP
2092 SP = newsp;
2093 PUTBACK;
2094
a8bba7fa 2095 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2096 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2097
d343c3ef
GG
2098 LEAVE_with_name("loop2");
2099 LEAVE_with_name("loop1");
a0d0e21e 2100
f86702cc 2101 return NORMAL;
a0d0e21e
LW
2102}
2103
2104PP(pp_return)
2105{
27da23d5 2106 dVAR; dSP; dMARK;
c09156bb 2107 register PERL_CONTEXT *cx;
f86702cc 2108 bool popsub2 = FALSE;
b45de488 2109 bool clear_errsv = FALSE;
a0d0e21e
LW
2110 I32 gimme;
2111 SV **newsp;
2112 PMOP *newpm;
2113 I32 optype = 0;
b0d9ce38 2114 SV *sv;
b263a1ad 2115 OP *retop = NULL;
a0d0e21e 2116
0bd48802
AL
2117 const I32 cxix = dopoptosub(cxstack_ix);
2118
9850bf21
RH
2119 if (cxix < 0) {
2120 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2121 * sort block, which is a CXt_NULL
2122 * not a CXt_SUB */
2123 dounwind(0);
d7507f74
RH
2124 PL_stack_base[1] = *PL_stack_sp;
2125 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2126 return 0;
2127 }
9850bf21
RH
2128 else
2129 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2130 }
a0d0e21e
LW
2131 if (cxix < cxstack_ix)
2132 dounwind(cxix);
2133
d7507f74
RH
2134 if (CxMULTICALL(&cxstack[cxix])) {
2135 gimme = cxstack[cxix].blk_gimme;
2136 if (gimme == G_VOID)
2137 PL_stack_sp = PL_stack_base;
2138 else if (gimme == G_SCALAR) {
2139 PL_stack_base[1] = *PL_stack_sp;
2140 PL_stack_sp = PL_stack_base + 1;
2141 }
9850bf21 2142 return 0;
d7507f74 2143 }
9850bf21 2144
a0d0e21e 2145 POPBLOCK(cx,newpm);
6b35e009 2146 switch (CxTYPE(cx)) {
a0d0e21e 2147 case CXt_SUB:
f86702cc 2148 popsub2 = TRUE;
f39bc417 2149 retop = cx->blk_sub.retop;
5dd42e15 2150 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2151 break;
2152 case CXt_EVAL:
b45de488
GS
2153 if (!(PL_in_eval & EVAL_KEEPERR))
2154 clear_errsv = TRUE;
a0d0e21e 2155 POPEVAL(cx);
f39bc417 2156 retop = cx->blk_eval.retop;
1d76a5c3
GS
2157 if (CxTRYBLOCK(cx))
2158 break;
067f92a0 2159 lex_end();
748a9306
LW
2160 if (optype == OP_REQUIRE &&
2161 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2162 {
54310121 2163 /* Unassume the success we assumed earlier. */
901017d6 2164 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2165 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2166 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2167 }
a0d0e21e 2168 break;
7766f137
GS
2169 case CXt_FORMAT:
2170 POPFORMAT(cx);
f39bc417 2171 retop = cx->blk_sub.retop;
7766f137 2172 break;
a0d0e21e 2173 default:
cea2e8a9 2174 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2175 }
2176
a1f49e72 2177 TAINT_NOT;
a0d0e21e 2178 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2179 if (MARK < SP) {
2180 if (popsub2) {
a8bba7fa 2181 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2182 if (SvTEMP(TOPs)) {
2183 *++newsp = SvREFCNT_inc(*SP);
2184 FREETMPS;
2185 sv_2mortal(*newsp);
959e3673
GS
2186 }
2187 else {
2188 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2189 FREETMPS;
959e3673
GS
2190 *++newsp = sv_mortalcopy(sv);
2191 SvREFCNT_dec(sv);
a29cdaf0 2192 }
959e3673
GS
2193 }
2194 else
a29cdaf0 2195 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2196 }
2197 else
a29cdaf0 2198 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2199 }
2200 else
3280af22 2201 *++newsp = &PL_sv_undef;
a0d0e21e 2202 }
54310121 2203 else if (gimme == G_ARRAY) {
a1f49e72 2204 while (++MARK <= SP) {
f86702cc
PP
2205 *++newsp = (popsub2 && SvTEMP(*MARK))
2206 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2207 TAINT_NOT; /* Each item is independent */
2208 }
a0d0e21e 2209 }
3280af22 2210 PL_stack_sp = newsp;
a0d0e21e 2211
5dd42e15 2212 LEAVE;
f86702cc
PP
2213 /* Stack values are safe: */
2214 if (popsub2) {
5dd42e15 2215 cxstack_ix--;
b0d9ce38 2216 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2217 }
b0d9ce38 2218 else
c445ea15 2219 sv = NULL;
3280af22 2220 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2221
b0d9ce38 2222 LEAVESUB(sv);
8433848b 2223 if (clear_errsv) {
ab69dbc2 2224 CLEAR_ERRSV();
8433848b 2225 }
f39bc417 2226 return retop;
a0d0e21e
LW
2227}
2228
2229PP(pp_last)
2230{
27da23d5 2231 dVAR; dSP;
a0d0e21e 2232 I32 cxix;
c09156bb 2233 register PERL_CONTEXT *cx;
f86702cc 2234 I32 pop2 = 0;
a0d0e21e 2235 I32 gimme;
8772537c 2236 I32 optype;
b263a1ad 2237 OP *nextop = NULL;
a0d0e21e
LW
2238 SV **newsp;
2239 PMOP *newpm;
a8bba7fa 2240 SV **mark;
c445ea15 2241 SV *sv = NULL;
9d4ba2ae 2242
a0d0e21e 2243
533c011a 2244 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2245 cxix = dopoptoloop(cxstack_ix);
2246 if (cxix < 0)
a651a37d 2247 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2248 }
2249 else {
2250 cxix = dopoptolabel(cPVOP->op_pv);
2251 if (cxix < 0)
cea2e8a9 2252 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2253 }
2254 if (cxix < cxstack_ix)
2255 dounwind(cxix);
2256
2257 POPBLOCK(cx,newpm);
5dd42e15 2258 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2259 mark = newsp;
6b35e009 2260 switch (CxTYPE(cx)) {
c6fdafd0 2261 case CXt_LOOP_LAZYIV:
d01136d6 2262 case CXt_LOOP_LAZYSV:
3b719c58
NC
2263 case CXt_LOOP_FOR:
2264 case CXt_LOOP_PLAIN:
2265 pop2 = CxTYPE(cx);
a8bba7fa 2266 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2267 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2268 break;
f86702cc 2269 case CXt_SUB:
f86702cc 2270 pop2 = CXt_SUB;
f39bc417 2271 nextop = cx->blk_sub.retop;
a0d0e21e 2272 break;
f86702cc
PP
2273 case CXt_EVAL:
2274 POPEVAL(cx);
f39bc417 2275 nextop = cx->blk_eval.retop;
a0d0e21e 2276 break;
7766f137
GS
2277 case CXt_FORMAT:
2278 POPFORMAT(cx);
f39bc417 2279 nextop = cx->blk_sub.retop;
7766f137 2280 break;
a0d0e21e 2281 default:
cea2e8a9 2282 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2283 }
2284
a1f49e72 2285 TAINT_NOT;
a0d0e21e 2286 if (gimme == G_SCALAR) {
f86702cc
PP
2287 if (MARK < SP)
2288 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2289 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2290 else
3280af22 2291 *++newsp = &PL_sv_undef;
a0d0e21e 2292 }
54310121 2293 else if (gimme == G_ARRAY) {
a1f49e72 2294 while (++MARK <= SP) {
f86702cc
PP
2295 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2296 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2297 TAINT_NOT; /* Each item is independent */
2298 }
f86702cc
PP
2299 }
2300 SP = newsp;
2301 PUTBACK;
2302
5dd42e15
DM
2303 LEAVE;
2304 cxstack_ix--;
f86702cc
PP
2305 /* Stack values are safe: */
2306 switch (pop2) {
c6fdafd0 2307 case CXt_LOOP_LAZYIV:
3b719c58 2308 case CXt_LOOP_PLAIN:
d01136d6 2309 case CXt_LOOP_LAZYSV:
3b719c58 2310 case CXt_LOOP_FOR:
a8bba7fa 2311 POPLOOP(cx); /* release loop vars ... */
4fdae800 2312 LEAVE;
f86702cc
PP
2313 break;
2314 case CXt_SUB:
b0d9ce38 2315 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2316 break;
a0d0e21e 2317 }
3280af22 2318 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2319
b0d9ce38 2320 LEAVESUB(sv);
9d4ba2ae
AL
2321 PERL_UNUSED_VAR(optype);
2322 PERL_UNUSED_VAR(gimme);
f86702cc 2323 return nextop;
a0d0e21e
LW
2324}
2325
2326PP(pp_next)
2327{
27da23d5 2328 dVAR;
a0d0e21e 2329 I32 cxix;
c09156bb 2330 register PERL_CONTEXT *cx;
85538317 2331 I32 inner;
a0d0e21e 2332
533c011a 2333 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2334 cxix = dopoptoloop(cxstack_ix);
2335 if (cxix < 0)
a651a37d 2336 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2337 }
2338 else {
2339 cxix = dopoptolabel(cPVOP->op_pv);
2340 if (cxix < 0)
cea2e8a9 2341 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2342 }
2343 if (cxix < cxstack_ix)
2344 dounwind(cxix);
2345
85538317
GS
2346 /* clear off anything above the scope we're re-entering, but
2347 * save the rest until after a possible continue block */
2348 inner = PL_scopestack_ix;
1ba6ee2b 2349 TOPBLOCK(cx);
85538317
GS
2350 if (PL_scopestack_ix < inner)
2351 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2352 PL_curcop = cx->blk_oldcop;
022eaa24 2353 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2354}
2355
2356PP(pp_redo)
2357{
27da23d5 2358 dVAR;
a0d0e21e 2359 I32 cxix;
c09156bb 2360 register PERL_CONTEXT *cx;
a0d0e21e 2361 I32 oldsave;
a034e688 2362 OP* redo_op;
a0d0e21e 2363
533c011a 2364 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2365 cxix = dopoptoloop(cxstack_ix);
2366 if (cxix < 0)
a651a37d 2367 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2368 }
2369 else {
2370 cxix = dopoptolabel(cPVOP->op_pv);
2371 if (cxix < 0)
cea2e8a9 2372 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2373 }
2374 if (cxix < cxstack_ix)
2375 dounwind(cxix);
2376
022eaa24 2377 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2378 if (redo_op->op_type == OP_ENTER) {
2379 /* pop one less context to avoid $x being freed in while (my $x..) */
2380 cxstack_ix++;
2381 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2382 redo_op = redo_op->op_next;
2383 }
2384
a0d0e21e 2385 TOPBLOCK(cx);
3280af22 2386 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2387 LEAVE_SCOPE(oldsave);
936c78b5 2388 FREETMPS;
3a1b2b9e 2389 PL_curcop = cx->blk_oldcop;
a034e688 2390 return redo_op;
a0d0e21e
LW
2391}
2392
0824fdcb 2393STATIC OP *
bfed75c6 2394S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2395{
97aff369 2396 dVAR;
a0d0e21e 2397 OP **ops = opstack;
bfed75c6 2398 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2399
7918f24d
NC
2400 PERL_ARGS_ASSERT_DOFINDLABEL;
2401
fc36a67e 2402 if (ops >= oplimit)
cea2e8a9 2403 Perl_croak(aTHX_ too_deep);
11343788
MB
2404 if (o->op_type == OP_LEAVE ||
2405 o->op_type == OP_SCOPE ||
2406 o->op_type == OP_LEAVELOOP ||
33d34e4c 2407 o->op_type == OP_LEAVESUB ||
11343788 2408 o->op_type == OP_LEAVETRY)
fc36a67e 2409 {
5dc0d613 2410 *ops++ = cUNOPo->op_first;
fc36a67e 2411 if (ops >= oplimit)
cea2e8a9 2412 Perl_croak(aTHX_ too_deep);
fc36a67e 2413 }
c4aa4e48 2414 *ops = 0;
11343788 2415 if (o->op_flags & OPf_KIDS) {
aec46f14 2416 OP *kid;
a0d0e21e 2417 /* First try all the kids at this level, since that's likeliest. */
11343788 2418 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac
AD
2419 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2420 const char *kid_label = CopLABEL(kCOP);
2421 if (kid_label && strEQ(kid_label, label))
2422 return kid;
2423 }
a0d0e21e 2424 }
11343788 2425 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2426 if (kid == PL_lastgotoprobe)
a0d0e21e 2427 continue;
ed8d0fe2
SM
2428 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2429 if (ops == opstack)
2430 *ops++ = kid;
2431 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2432 ops[-1]->op_type == OP_DBSTATE)
2433 ops[-1] = kid;
2434 else
2435 *ops++ = kid;
2436 }
155aba94 2437 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2438 return o;
a0d0e21e
LW
2439 }
2440 }
c4aa4e48 2441 *ops = 0;
a0d0e21e
LW
2442 return 0;
2443}
2444
a0d0e21e
LW
2445PP(pp_goto)
2446{
27da23d5 2447 dVAR; dSP;
cbbf8932 2448 OP *retop = NULL;
a0d0e21e 2449 I32 ix;
c09156bb 2450 register PERL_CONTEXT *cx;
fc36a67e
PP
2451#define GOTO_DEPTH 64
2452 OP *enterops[GOTO_DEPTH];
cbbf8932 2453 const char *label = NULL;
bfed75c6
AL
2454 const bool do_dump = (PL_op->op_type == OP_DUMP);
2455 static const char must_have_label[] = "goto must have label";
a0d0e21e 2456
533c011a 2457 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2458 SV * const sv = POPs;
a0d0e21e
LW
2459
2460 /* This egregious kludge implements goto &subroutine */
2461 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2462 I32 cxix;
c09156bb 2463 register PERL_CONTEXT *cx;
ea726b52 2464 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW
2465 SV** mark;
2466 I32 items = 0;
2467 I32 oldsave;
b1464ded 2468 bool reified = 0;
a0d0e21e 2469
e8f7dd13 2470 retry:
4aa0a1f7 2471 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2472 const GV * const gv = CvGV(cv);
e8f7dd13 2473 if (gv) {
7fc63493 2474 GV *autogv;
e8f7dd13
GS
2475 SV *tmpstr;
2476 /* autoloaded stub? */
2477 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2478 goto retry;
2479 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2480 GvNAMELEN(gv), FALSE);
2481 if (autogv && (cv = GvCV(autogv)))
2482 goto retry;
2483 tmpstr = sv_newmortal();
c445ea15 2484 gv_efullname3(tmpstr, gv, NULL);
be2597df 2485 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2486 }
cea2e8a9 2487 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2488 }
2489
a0d0e21e 2490 /* First do some returnish stuff. */
b37c2d43 2491 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2492 FREETMPS;
a0d0e21e
LW
2493 cxix = dopoptosub(cxstack_ix);
2494 if (cxix < 0)
cea2e8a9 2495 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2496 if (cxix < cxstack_ix)
2497 dounwind(cxix);
2498 TOPBLOCK(cx);
2d43a17f 2499 SPAGAIN;
564abe23 2500 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2501 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2502 if (CxREALEVAL(cx))
2503 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2504 else
2505 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2506 }
9850bf21
RH
2507 else if (CxMULTICALL(cx))
2508 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2509 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2510 /* put @_ back onto stack */
a0d0e21e 2511 AV* av = cx->blk_sub.argarray;
bfed75c6 2512
93965878 2513 items = AvFILLp(av) + 1;
a45cdc79
DM
2514 EXTEND(SP, items+1); /* @_ could have been extended. */
2515 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2516 SvREFCNT_dec(GvAV(PL_defgv));
2517 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2518 CLEAR_ARGARRAY(av);
d8b46c1b 2519 /* abandon @_ if it got reified */
62b1ebc2 2520 if (AvREAL(av)) {
b1464ded
DM
2521 reified = 1;
2522 SvREFCNT_dec(av);
d8b46c1b
GS
2523 av = newAV();
2524 av_extend(av, items-1);
11ca45c0 2525 AvREIFY_only(av);
ad64d0ec 2526 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2527 }
a0d0e21e 2528 }
aed2304a 2529 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2530 AV* const av = GvAV(PL_defgv);
1fa4e549 2531 items = AvFILLp(av) + 1;
a45cdc79
DM
2532 EXTEND(SP, items+1); /* @_ could have been extended. */
2533 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2534 }
a45cdc79
DM
2535 mark = SP;
2536 SP += items;
6b35e009 2537 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2538 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2539 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2540 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2541 LEAVE_SCOPE(oldsave);
2542
2543 /* Now do some callish stuff. */
2544 SAVETMPS;
5023d17a 2545 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2546 if (CvISXSUB(cv)) {
b37c2d43 2547 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2548 SV **newsp;
2549 I32 gimme;
b1464ded
DM
2550 if (reified) {
2551 I32 index;
2552 for (index=0; index<items; index++)
2553 sv_2mortal(SP[-index]);
2554 }
1fa4e549 2555
b37c2d43
AL
2556 /* XS subs don't have a CxSUB, so pop it */
2557 POPBLOCK(cx, PL_curpm);
2558 /* Push a mark for the start of arglist */
2559 PUSHMARK(mark);
2560 PUTBACK;
2561 (void)(*CvXSUB(cv))(aTHX_ cv);
d343c3ef 2562 LEAVE_with_name("sub");
5eff7df7 2563 return retop;
a0d0e21e
LW
2564 }
2565 else {
b37c2d43 2566 AV* const padlist = CvPADLIST(cv);
6b35e009 2567 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2568 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2569 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2570 cx->cx_type = CXt_SUB;
b150fb22 2571 }
a0d0e21e 2572 cx->blk_sub.cv = cv;
1a5b3db4 2573 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2574
a0d0e21e
LW
2575 CvDEPTH(cv)++;
2576 if (CvDEPTH(cv) < 2)
74c765eb 2577 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2578 else {
2b9dff67 2579 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2580 sub_crush_depth(cv);
26019298 2581 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2582 }
fd617465
DM
2583 SAVECOMPPAD();
2584 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2585 if (CxHASARGS(cx))
6d4ff0d2 2586 {
502c6561 2587 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2588
3280af22 2589 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2590 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2591 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2592 cx->blk_sub.argarray = av;
a0d0e21e
LW
2593
2594 if (items >= AvMAX(av) + 1) {
b37c2d43 2595 SV **ary = AvALLOC(av);
a0d0e21e
LW
2596 if (AvARRAY(av) != ary) {
2597 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2598 AvARRAY(av) = ary;
a0d0e21e
LW
2599 }
2600 if (items >= AvMAX(av) + 1) {
2601 AvMAX(av) = items - 1;
2602 Renew(ary,items+1,SV*);
2603 AvALLOC(av) = ary;
9c6bc640 2604 AvARRAY(av) = ary;
a0d0e21e
LW
2605 }
2606 }
a45cdc79 2607 ++mark;
a0d0e21e 2608 Copy(mark,AvARRAY(av),items,SV*);
93965878 2609 AvFILLp(av) = items - 1;
d8b46c1b 2610 assert(!AvREAL(av));
b1464ded
DM
2611 if (reified) {
2612 /* transfer 'ownership' of refcnts to new @_ */
2613 AvREAL_on(av);
2614 AvREIFY_off(av);
2615 }
a0d0e21e
LW
2616 while (items--) {
2617 if (*mark)
2618 SvTEMP_off(*mark);
2619 mark++;
2620 }
2621 }
491527d0 2622 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2623 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2624 if (PERLDB_GOTO) {
b96d8cd9 2625 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2626 if (gotocv) {
2627 PUSHMARK( PL_stack_sp );
ad64d0ec 2628 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2629 PL_stack_sp--;
2630 }
491527d0 2631 }
1ce6579f 2632 }
a0d0e21e
LW
2633 RETURNOP(CvSTART(cv));
2634 }
2635 }
1614b0e3 2636 else {
0510663f 2637 label = SvPV_nolen_const(sv);
1614b0e3 2638 if (!(do_dump || *label))
cea2e8a9 2639 DIE(aTHX_ must_have_label);
1614b0e3 2640 }
a0d0e21e 2641 }
533c011a 2642 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2643 if (! do_dump)
cea2e8a9 2644 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2645 }
2646 else
2647 label = cPVOP->op_pv;
2648
2649 if (label && *label) {
cbbf8932 2650 OP *gotoprobe = NULL;
3b2447bc 2651 bool leaving_eval = FALSE;
33d34e4c 2652 bool in_block = FALSE;
cbbf8932 2653 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2654
2655 /* find label */
2656
d4c19fe8 2657 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2658 *enterops = 0;
2659 for (ix = cxstack_ix; ix >= 0; ix--) {
2660 cx = &cxstack[ix];
6b35e009 2661 switch (CxTYPE(cx)) {
a0d0e21e 2662 case CXt_EVAL:
3b2447bc 2663 leaving_eval = TRUE;
971ecbe6 2664 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2665 gotoprobe = (last_eval_cx ?
2666 last_eval_cx->blk_eval.old_eval_root :
2667 PL_eval_root);
2668 last_eval_cx = cx;
9c5794fe
RH
2669 break;
2670 }
2671 /* else fall through */
c6fdafd0 2672 case CXt_LOOP_LAZYIV:
d01136d6 2673 case CXt_LOOP_LAZYSV:
3b719c58
NC
2674 case CXt_LOOP_FOR:
2675 case CXt_LOOP_PLAIN:
bb5aedc1
VP
2676 case CXt_GIVEN:
2677 case CXt_WHEN:
a0d0e21e
LW
2678 gotoprobe = cx->blk_oldcop->op_sibling;
2679 break;
2680 case CXt_SUBST:
2681 continue;
2682 case CXt_BLOCK:
33d34e4c 2683 if (ix) {
a0d0e21e 2684 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2685 in_block = TRUE;
2686 } else
3280af22 2687 gotoprobe = PL_main_root;
a0d0e21e 2688 break;
b3933176 2689 case CXt_SUB:
9850bf21 2690 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2691 gotoprobe = CvROOT(cx->blk_sub.cv);
2692 break;
2693 }
2694 /* FALL THROUGH */
7766f137 2695 case CXt_FORMAT:
0a753a76 2696 case CXt_NULL:
a651a37d 2697 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2698 default:
2699 if (ix)
cea2e8a9 2700 DIE(aTHX_ "panic: goto");
3280af22 2701 gotoprobe = PL_main_root;
a0d0e21e
LW
2702 break;
2703 }
2b597662
GS
2704 if (gotoprobe) {
2705 retop = dofindlabel(gotoprobe, label,
2706 enterops, enterops + GOTO_DEPTH);
2707 if (retop)
2708 break;
2709 }
3280af22 2710 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2711 }
2712 if (!retop)
cea2e8a9 2713 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2714
3b2447bc
RH
2715 /* if we're leaving an eval, check before we pop any frames
2716 that we're not going to punt, otherwise the error
2717 won't be caught */
2718
2719 if (leaving_eval && *enterops && enterops[1]) {
2720 I32 i;
2721 for (i = 1; enterops[i]; i++)
2722 if (enterops[i]->op_type == OP_ENTERITER)
2723 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2724 }
2725
b500e03b
GG
2726 if (*enterops && enterops[1]) {
2727 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2728 if (enterops[i])
2729 deprecate("\"goto\" to jump into a construct");
2730 }
2731
a0d0e21e
LW
2732 /* pop unwanted frames */
2733
2734 if (ix < cxstack_ix) {
2735 I32 oldsave;
2736
2737 if (ix < 0)
2738 ix = 0;
2739 dounwind(ix);
2740 TOPBLOCK(cx);
3280af22 2741 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2742 LEAVE_SCOPE(oldsave);
2743 }
2744
2745 /* push wanted frames */
2746
748a9306 2747 if (*enterops && enterops[1]) {
0bd48802 2748 OP * const oldop = PL_op;
33d34e4c
AE
2749 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2750 for (; enterops[ix]; ix++) {
533c011a 2751 PL_op = enterops[ix];
84902520
TB
2752 /* Eventually we may want to stack the needed arguments
2753 * for each op. For now, we punt on the hard ones. */
533c011a 2754 if (PL_op->op_type == OP_ENTERITER)
894356b3 2755 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2756 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2757 }
533c011a 2758 PL_op = oldop;
a0d0e21e
LW
2759 }
2760 }
2761
2762 if (do_dump) {
a5f75d66 2763#ifdef VMS
6b88bc9c 2764 if (!retop) retop = PL_main_start;
a5f75d66 2765#endif
3280af22
NIS
2766 PL_restartop = retop;
2767 PL_do_undump = TRUE;
a0d0e21e
LW
2768
2769 my_unexec();
2770
3280af22
NIS
2771 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2772 PL_do_undump = FALSE;
a0d0e21e
LW
2773 }
2774
2775 RETURNOP(retop);
2776}
2777
2778PP(pp_exit)
2779{
97aff369 2780 dVAR;
39644a26 2781 dSP;
a0d0e21e
LW
2782 I32 anum;
2783
2784 if (MAXARG < 1)
2785 anum = 0;
ff0cee69 2786 else {
a0d0e21e 2787 anum = SvIVx(POPs);
d98f61e7
GS
2788#ifdef VMS
2789 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2790 anum = 0;
96e176bf 2791 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2792#endif
2793 }
cc3604b1 2794 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2795#ifdef PERL_MAD
2796 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2797 if (anum || !(PL_minus_c && PL_madskills))
2798 my_exit(anum);
2799#else
a0d0e21e 2800 my_exit(anum);
81d86705 2801#endif
3280af22 2802 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2803 RETURN;
2804}
2805
a0d0e21e
LW
2806/* Eval. */
2807
0824fdcb 2808STATIC void
cea2e8a9 2809S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2810{
504618e9 2811 const char *s = SvPVX_const(sv);
890ce7af 2812 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2813 I32 line = 1;
a0d0e21e 2814
7918f24d
NC
2815 PERL_ARGS_ASSERT_SAVE_LINES;
2816
a0d0e21e 2817 while (s && s < send) {
f54cb97a 2818 const char *t;
b9f83d2f 2819 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2820
1d963ff3 2821 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
2822 if (t)
2823 t++;
2824 else
2825 t = send;
2826
2827 sv_setpvn(tmpstr, s, t - s);
2828 av_store(array, line++, tmpstr);
2829 s = t;
2830 }
2831}
2832
0824fdcb 2833STATIC OP *
cea2e8a9 2834S_docatch(pTHX_ OP *o)
1e422769 2835{
97aff369 2836 dVAR;
6224f72b 2837 int ret;
06b5626a 2838 OP * const oldop = PL_op;
db36c5a1 2839 dJMPENV;
1e422769 2840
1e422769 2841#ifdef DEBUGGING
54310121 2842 assert(CATCH_GET == TRUE);
1e422769 2843#endif
312caa8e 2844 PL_op = o;
8bffa5f8 2845
14dd3ad8 2846 JMPENV_PUSH(ret);
6224f72b 2847 switch (ret) {
312caa8e 2848 case 0:
abd70938
DM
2849 assert(cxstack_ix >= 0);
2850 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2851 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2852 redo_body:
85aaa934 2853 CALLRUNOPS(aTHX);
312caa8e
CS
2854 break;
2855 case 3:
8bffa5f8 2856 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2857
2858 /* NB XXX we rely on the old popped CxEVAL still being at the top
2859 * of the stack; the way die_where() currently works, this
2860 * assumption is valid. In theory The cur_top_env value should be
2861 * returned in another global, the way retop (aka PL_restartop)
2862 * is. */
2863 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2864
2865 if (PL_restartop
2866 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2867 {
312caa8e
CS
2868 PL_op = PL_restartop;
2869 PL_restartop = 0;
2870 goto redo_body;
2871 }
2872 /* FALL THROUGH */
2873 default:
14dd3ad8 2874 JMPENV_POP;
533c011a 2875 PL_op = oldop;
6224f72b 2876 JMPENV_JUMP(ret);
1e422769 2877 /* NOTREACHED */
1e422769 2878 }
14dd3ad8 2879 JMPENV_POP;
533c011a 2880 PL_op = oldop;
5f66b61c 2881 return NULL;
1e422769
PP
2882}
2883
c277df42 2884OP *
bfed75c6 2885Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2886/* sv Text to convert to OP tree. */
2887/* startop op_free() this to undo. */
2888/* code Short string id of the caller. */
2889{
f7997f86 2890 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2891 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2892 PERL_CONTEXT *cx;
2893 SV **newsp;
b094c71d 2894 I32 gimme = G_VOID;
c277df42
IZ
2895 I32 optype;
2896 OP dummy;
83ee9e09
GS
2897 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2898 char *tmpbuf = tbuf;
c277df42 2899 char *safestr;
a3985cdc 2900 int runtime;
601f1833 2901 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2902 STRLEN len;
c277df42 2903
7918f24d
NC
2904 PERL_ARGS_ASSERT_SV_COMPILE_2OP;
2905
d343c3ef 2906 ENTER_with_name("eval");
5486870f 2907 lex_start(sv, NULL, FALSE);
c277df42
IZ
2908 SAVETMPS;
2909 /* switch to eval mode */
2910
923e4eb5 2911 if (IN_PERL_COMPILETIME) {
f4dd75d9 2912 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2913 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2914 }
83ee9e09 2915 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2916 SV * const sv = sv_newmortal();
83ee9e09
GS
2917 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2918 code, (unsigned long)++PL_evalseq,
2919 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2920 tmpbuf = SvPVX(sv);
fc009855 2921 len = SvCUR(sv);
83ee9e09
GS
2922 }
2923 else
d9fad198
JH
2924 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2925 (unsigned long)++PL_evalseq);
f4dd75d9 2926 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2927 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2928 SAVECOPLINE(&PL_compiling);
57843af0 2929 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2930 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2931 deleting the eval's FILEGV from the stash before gv_check() runs
2932 (i.e. before run-time proper). To work around the coredump that
2933 ensues, we always turn GvMULTI_on for any globals that were
2934 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2935 safestr = savepvn(tmpbuf, len);
2936 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2937 SAVEHINTS();
d1ca3daa 2938#ifdef OP_IN_REGISTER
6b88bc9c 2939 PL_opsave = op;
d1ca3daa 2940#else
7766f137 2941 SAVEVPTR(PL_op);
d1ca3daa 2942#endif
c277df42 2943
a3985cdc 2944 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2945 runtime = IN_PERL_RUNTIME;
a3985cdc 2946 if (runtime)
d819b83a 2947 runcv = find_runcv(NULL);
a3985cdc 2948
533c011a 2949 PL_op = &dummy;
13b51b79 2950 PL_op->op_type = OP_ENTEREVAL;
533c011a 2951 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2952 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 2953 PUSHEVAL(cx, 0);
a3985cdc
DM
2954
2955 if (runtime)
410be5db 2956 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2957 else
410be5db 2958 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2959 POPBLOCK(cx,PL_curpm);
e84b9f1f 2960 POPEVAL(cx);
c277df42
IZ
2961
2962 (*startop)->op_type = OP_NULL;
22c35a8c 2963 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2964 lex_end();
f3548bdc 2965 /* XXX DAPM do this properly one year */
502c6561 2966 *padp = MUTABLE_AV(SvREFCNT_inc_simple(PL_comppad));
d343c3ef 2967 LEAVE_with_name("eval");
923e4eb5 2968 if (IN_PERL_COMPILETIME)
623e6609 2969 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2970#ifdef OP_IN_REGISTER
6b88bc9c 2971 op = PL_opsave;
d1ca3daa 2972#endif
9d4ba2ae
AL
2973 PERL_UNUSED_VAR(newsp);
2974 PERL_UNUSED_VAR(optype);
2975
410be5db 2976 return PL_eval_start;
c277df42
IZ
2977}
2978
a3985cdc
DM
2979
2980/*
2981=for apidoc find_runcv
2982
2983Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2984If db_seqp is non_null, skip CVs that are in the DB package and populate
2985*db_seqp with the cop sequence number at the point that the DB:: code was
2986entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2987than in the scope of the debugger itself).
a3985cdc
DM
2988
2989=cut
2990*/
2991
2992CV*
d819b83a 2993Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2994{
97aff369 2995 dVAR;
a3985cdc 2996 PERL_SI *si;
a3985cdc 2997
d819b83a
DM
2998 if (db_seqp)
2999 *db_seqp = PL_curcop->cop_seq;
a3985cdc 3000 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3001 I32 ix;
a3985cdc 3002 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3003 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 3004 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 3005 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
3006 /* skip DB:: code */
3007 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3008 *db_seqp = cx->blk_oldcop->cop_seq;
3009 continue;
3010 }
3011 return cv;
3012 }
a3985cdc
DM
3013 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
3014 return PL_compcv;
3015 }
3016 }
3017 return PL_main_cv;
3018}
3019
3020
3021/* Compile a require/do, an eval '', or a /(?{...})/.
3022 * In the last case, startop is non-null, and contains the address of
3023 * a pointer that should be set to the just-compiled code.
3024 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM
3025 * Returns a bool indicating whether the compile was successful; if so,
3026 * PL_eval_start contains the first op of the compiled ocde; otherwise,
3027 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM
3028 */
3029
410be5db 3030STATIC bool
a3985cdc 3031S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 3032{
27da23d5 3033 dVAR; dSP;
46c461b5 3034 OP * const saveop = PL_op;
a0d0e21e 3035
6dc8a9e4
IZ
3036 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
3037 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
3038 : EVAL_INEVAL);
a0d0e21e 3039
1ce6579f
PP
3040 PUSHMARK(SP);
3041
3280af22 3042 SAVESPTR(PL_compcv);
ea726b52 3043 PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
1aff0e91 3044 CvEVAL_on(PL_compcv);
2090ab20
JH
3045 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3046 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
3047
a3985cdc 3048 CvOUTSIDE_SEQ(PL_compcv) = seq;
ea726b52 3049 CvOUTSIDE(PL_compcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3050
dd2155a4 3051 /* set up a scratch pad */
a0d0e21e 3052
dd2155a4 3053 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 3054 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3055
07055b4c 3056
81d86705
NC
3057 if (!PL_madskills)
3058 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 3059
a0d0e21e
LW
3060 /* make sure we compile in the right package */
3061
ed094faf 3062 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 3063 SAVESPTR(PL_curstash);
ed094faf 3064 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 3065 }
3c10abe3 3066 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
3067 SAVESPTR(PL_beginav);
3068 PL_beginav = newAV();
3069 SAVEFREESV(PL_beginav);
3c10abe3
AG
3070 SAVESPTR(PL_unitcheckav);
3071 PL_unitcheckav = newAV();
3072 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3073
81d86705 3074#ifdef PERL_MAD
9da243ce 3075 SAVEBOOL(PL_madskills);
81d86705
NC
3076 PL_madskills = 0;
3077#endif
3078
a0d0e21e
LW
3079 /* try to compile it */
3080
5f66b61c 3081 PL_eval_root = NULL;
3280af22 3082 PL_curcop = &PL_compiling;
fc15ae8f 3083 CopARYBASE_set(PL_curcop, 0);
5f66b61c 3084 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3085 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS
3086 else
3087 CLEAR_ERRSV();
13765c85 3088 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 3089 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 3090 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 3091 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 3092 const char *msg;
bfed75c6 3093
533c011a 3094 PL_op = saveop;
3280af22
NIS
3095 if (PL_eval_root) {
3096 op_free(PL_eval_root);
5f66b61c 3097 PL_eval_root = NULL;
a0d0e21e 3098 }
3280af22 3099 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 3100 if (!startop) {
3280af22 3101 POPBLOCK(cx,PL_curpm);
c277df42 3102 POPEVAL(cx);
c277df42 3103 }
a0d0e21e 3104 lex_end();
d343c3ef 3105 LEAVE_with_name("eval"); /* pp_entereval knows about this LEAVE. */
9d4ba2ae
AL
3106
3107 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 3108 if (optype == OP_REQUIRE) {
b464bac0 3109 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 3110 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 3111 &PL_sv_undef, 0);
58d3fd3b
SH
3112 Perl_croak(aTHX_ "%sCompilation failed in require",
3113 *msg ? msg : "Unknown error\n");
5a844595
GS
3114 }
3115 else if (startop) {
3280af22 3116 POPBLOCK(cx,PL_curpm);
c277df42 3117 POPEVAL(cx);
5a844595
GS
3118 Perl_croak(aTHX_ "%sCompilation failed in regexp",
3119 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 3120 }
9d7f88dd 3121 else {
9d7f88dd 3122 if (!*msg) {
6502358f 3123 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
3124 }
3125 }
9d4ba2ae 3126 PERL_UNUSED_VAR(newsp);
410be5db
DM
3127 PUSHs(&PL_sv_undef);
3128 PUTBACK;
3129 return FALSE;
a0d0e21e 3130 }
57843af0 3131 CopLINE_set(&PL_compiling, 0);
c277df42 3132 if (startop) {
3280af22 3133 *startop = PL_eval_root;
c277df42 3134 } else
3280af22 3135 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
3136
3137 /* Set the context for this new optree.
021f53de
GG
3138 * Propagate the context from the eval(). */
3139 if ((gimme & G_WANT) == G_VOID)
3280af22 3140 scalarvoid(PL_eval_root);
7df0357e 3141 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3142 list(PL_eval_root);
a0d0e21e 3143 else
3280af22 3144 scalar(PL_eval_root);
a0d0e21e
LW
3145
3146 DEBUG_x(dump_eval());
3147
55497cff 3148 /* Register with debugger: */
6482a30d 3149 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
b96d8cd9 3150 CV * const cv = get_cvs("DB::postponed", 0);
55497cff
PP
3151 if (cv) {
3152 dSP;
924508f0 3153 PUSHMARK(SP);
ad64d0ec 3154 XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling)));
55497cff 3155 PUTBACK;
ad64d0ec 3156 call_sv(MUTABLE_SV(cv), G_DISCARD);
55497cff
PP
3157 }
3158 }
3159
3c10abe3
AG
3160 if (PL_unitcheckav)
3161 call_list(PL_scopestack_ix, PL_unitcheckav);
3162
a0d0e21e
LW
3163 /* compiled okay, so do it */
3164
3280af22
NIS
3165 CvDEPTH(PL_compcv) = 1;
3166 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3167 PL_op = saveop; /* The caller may need it. */
bc177e6b 3168 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3169
410be5db
DM
3170 PUTBACK;
3171 return TRUE;
a0d0e21e
LW
3172}
3173
a6c40364 3174STATIC PerlIO *
0786552a 3175S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP
3176{
3177 Stat_t st;
c445ea15 3178 const int st_rc = PerlLIO_stat(name, &st);
df528165 3179
7918f24d
NC
3180 PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN;
3181
6b845e56 3182 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3183 return NULL;
ce8abf5f
SP
3184 }
3185
0786552a 3186 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP
3187}
3188
75c20bac 3189#ifndef PERL_DISABLE_PMC
ce8abf5f 3190STATIC PerlIO *
0786552a 3191S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3192{
b295d113
TH
3193 PerlIO *fp;
3194
7918f24d
NC
3195 PERL_ARGS_ASSERT_DOOPEN_PM;
3196
ce9440c8 3197 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC
3198 SV *const pmcsv = newSV(namelen + 2);
3199 char *const pmc = SvPVX(pmcsv);
a6c40364 3200 Stat_t pmcstat;
50b8ed39
NC
3201
3202 memcpy(pmc, name, namelen);
3203 pmc[namelen] = 'c';
3204 pmc[namelen + 1] = '\0';
3205
a6c40364 3206 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3207 fp = check_type_and_open(name);
a6c40364
GS
3208 }
3209 else {
0786552a 3210 fp = check_type_and_open(pmc);
b295d113 3211 }
a6c40364
GS
3212 SvREFCNT_dec(pmcsv);
3213 }
3214 else {
0786552a 3215 fp = check_type_and_open(name);
b295d113 3216 }
b295d113 3217 return fp;
75c20bac 3218}
7925835c 3219#else
75c20bac 3220# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3221#endif /* !PERL_DISABLE_PMC */
b295d113 3222
a0d0e21e
LW
3223PP(pp_require)
3224{
27da23d5 3225 dVAR; dSP;
c09156bb 3226 register PERL_CONTEXT *cx;
a0d0e21e 3227 SV *sv;
5c144d81 3228 const char *name;
6132ea6c 3229 STRLEN len;
4492be7a
JM
3230 char * unixname;
3231 STRLEN unixlen;
62f5ad7a 3232#ifdef VMS
4492be7a 3233 int vms_unixname = 0;
62f5ad7a 3234#endif
c445ea15
AL
3235 const char *tryname = NULL;
3236 SV *namesv = NULL;
f54cb97a 3237 const I32 gimme = GIMME_V;
bbed91b5 3238 int filter_has_file = 0;
c445ea15 3239 PerlIO *tryrsfp = NULL;
34113e50 3240 SV *filter_cache = NULL;
c445ea15
AL
3241 SV *filter_state = NULL;
3242 SV *filter_sub = NULL;
3243 SV *hook_sv = NULL;
6ec9efec
JH
3244 SV *encoding;
3245 OP *op;
a0d0e21e
LW
3246
3247 sv = POPs;
d7aa5382 3248 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP
3249 sv = new_version(sv);
3250 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3251 upg_version(PL_patchlevel, TRUE);
149c1637 3252 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3253 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3254 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3255 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3256 }
3257 else {
d1029faa
JP
3258 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3259 I32 first = 0;
3260 AV *lav;
3261 SV * const req = SvRV(sv);
85fbaab2 3262 SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE);
d1029faa
JP
3263
3264 /* get the left hand term */
502c6561 3265 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE)));
d1029faa
JP
3266
3267 first = SvIV(*av_fetch(lav,0,0));
3268 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
85fbaab2 3269 || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
d1029faa
JP
3270 || av_len(lav) > 1 /* FP with > 3 digits */
3271 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3272 ) {
3273 DIE(aTHX_ "Perl %"SVf" required--this is only "
3274 "%"SVf", stopped", SVfARG(vnormal(req)),
3275 SVfARG(vnormal(PL_patchlevel)));
3276 }
3277 else { /* probably 'use 5.10' or 'use 5.8' */
3278 SV * hintsv = newSV(0);
3279 I32 second = 0;
3280
3281 if (av_len(lav)>=1)
3282 second = SvIV(*av_fetch(lav,1,0));
3283
3284 second /= second >= 600 ? 100 : 10;
3285 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.%d",
3286 (int)first, (int)second,0);
3287 upg_version(hintsv, TRUE);
3288
3289 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3290 "--this is only %"SVf", stopped",
3291 SVfARG(vnormal(req)),
3292 SVfARG(vnormal(hintsv)),
3293 SVfARG(vnormal(PL_patchlevel)));
3294 }
3295 }
468aa647 3296 }
d7aa5382 3297
fbc891ce
RB
3298 /* We do this only with use, not require. */
3299 if (PL_compcv &&
fbc891ce
RB
3300 /* If we request a version >= 5.9.5, load feature.pm with the
3301 * feature bundle that corresponds to the required version. */
2e8342de 3302 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3303 SV *const importsv = vnormal(sv);
3304 *SvPVX_mutable(importsv) = ':';
d343c3ef 3305 ENTER_with_name("load_feature");
7dfde25d 3306 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
d343c3ef 3307 LEAVE_with_name("load_feature");
7dfde25d 3308 }
53eb19dd
SM
3309 /* If a version >= 5.11.0 is requested, strictures are on by default! */
3310 if (PL_compcv &&
3311 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.011000), FALSE))) >= 0) {
5cc917d6 3312 PL_hints |= (HINT_STRICT_REFS | HINT_STRICT_SUBS | HINT_STRICT_VARS);
53eb19dd
SM
3313 }
3314
7dfde25d 3315 RETPUSHYES;
a0d0e21e 3316 }
5c144d81 3317 name = SvPV_const(sv, len);
6132ea6c 3318 if (!(name && len > 0 && *name))
cea2e8a9 3319 DIE(aTHX_ "Null filename used");
4633a7c4 3320 TAINT_PROPER("require");
4492be7a
JM
3321
3322
3323#ifdef VMS
3324 /* The key in the %ENV hash is in the syntax of file passed as the argument
3325 * usually this is in UNIX format, but sometimes in VMS format, which
3326 * can result in a module being pulled in more than once.
3327 * To prevent this, the key must be stored in UNIX format if the VMS
3328 * name can be translated to UNIX.
3329 */
3330 if ((unixname = tounixspec(name, NULL)) != NULL) {
3331 unixlen = strlen(unixname);
3332 vms_unixname = 1;
3333 }
3334 else
3335#endif
3336 {
3337 /* if not VMS or VMS name can not be translated to UNIX, pass it
3338 * through.
3339 */
3340 unixname = (char *) name;
3341 unixlen = len;
3342 }
44f8325f 3343 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM
3344 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3345 unixname, unixlen, 0);
44f8325f
AL
3346 if ( svp ) {
3347 if (*svp != &PL_sv_undef)
3348 RETPUSHYES;
3349 else
087b5369
RD
3350 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3351 "Compilation failed in require", unixname);
44f8325f 3352 }
4d8b06f1 3353 }
a0d0e21e
LW
3354
3355 /* prepare to compile file */
3356
be4b629d 3357 if (path_is_absolute(name)) {
46fc3d4c 3358 tryname = name;
0786552a 3359 tryrsfp = doopen_pm(name, len);
bf4acbe4 3360 }
be4b629d 3361 if (!tryrsfp) {
44f8325f 3362 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3363 I32 i;
748a9306 3364#ifdef VMS
4492be7a 3365 if (vms_unixname)
46fc3d4c
PP
3366#endif
3367 {
d0328fd7 3368 namesv = newSV_type(SVt_PV);
46fc3d4c 3369 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3370 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3371
ad64d0ec 3372 if (SvTIED_mg((const SV *)ar, PERL_MAGIC_tied))
c38a6530 3373 mg_get(dirsv);
bbed91b5
KF
3374 if (SvROK(dirsv)) {
3375 int count;