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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
54310121 37#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 38
94fcd414
NC
39#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
40
a0d0e21e
LW
41PP(pp_wantarray)
42{
97aff369 43 dVAR;
39644a26 44 dSP;
a0d0e21e 45 I32 cxix;
93f0bc49 46 const PERL_CONTEXT *cx;
a0d0e21e
LW
47 EXTEND(SP, 1);
48
93f0bc49
FC
49 if (PL_op->op_private & OPpOFFBYONE) {
50 if (!(cx = caller_cx(1,NULL))) RETPUSHUNDEF;
51 }
52 else {
53 cxix = dopoptosub(cxstack_ix);
54 if (cxix < 0)
a0d0e21e 55 RETPUSHUNDEF;
93f0bc49
FC
56 cx = &cxstack[cxix];
57 }
a0d0e21e 58
93f0bc49 59 switch (cx->blk_gimme) {
54310121 60 case G_ARRAY:
a0d0e21e 61 RETPUSHYES;
54310121 62 case G_SCALAR:
a0d0e21e 63 RETPUSHNO;
54310121
PP
64 default:
65 RETPUSHUNDEF;
66 }
a0d0e21e
LW
67}
68
2cd61cdb
IZ
69PP(pp_regcreset)
70{
97aff369 71 dVAR;
2cd61cdb
IZ
72 /* XXXX Should store the old value to allow for tie/overload - and
73 restore in regcomp, where marked with XXXX. */
3280af22 74 PL_reginterp_cnt = 0;
0b4182de 75 TAINT_NOT;
2cd61cdb
IZ
76 return NORMAL;
77}
78
b3eb6a9b
GS
79PP(pp_regcomp)
80{
97aff369 81 dVAR;
39644a26 82 dSP;
a0d0e21e 83 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 84 SV *tmpstr;
84679df5 85 REGEXP *re = NULL;
bfed75c6 86
4b5a0d1c 87 /* prevent recompiling under /o and ithreads. */
3db8f154 88#if defined(USE_ITHREADS)
131b3ad0
DM
89 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
90 if (PL_op->op_flags & OPf_STACKED) {
91 dMARK;
92 SP = MARK;
93 }
94 else
95 (void)POPs;
96 RETURN;
97 }
513629ba 98#endif
d4b87e75
BM
99
100#define tryAMAGICregexp(rx) \
101 STMT_START { \
6f1401dc 102 SvGETMAGIC(rx); \
d4b87e75 103 if (SvROK(rx) && SvAMAGIC(rx)) { \
31d632c3 104 SV *sv = AMG_CALLunary(rx, regexp_amg); \
d4b87e75
BM
105 if (sv) { \
106 if (SvROK(sv)) \
107 sv = SvRV(sv); \
108 if (SvTYPE(sv) != SVt_REGEXP) \
109 Perl_croak(aTHX_ "Overloaded qr did not return a REGEXP"); \
110 rx = sv; \
111 } \
112 } \
113 } STMT_END
114
115
131b3ad0 116 if (PL_op->op_flags & OPf_STACKED) {
486ec47a 117 /* multiple args; concatenate them */
131b3ad0
DM
118 dMARK; dORIGMARK;
119 tmpstr = PAD_SV(ARGTARG);
76f68e9b 120 sv_setpvs(tmpstr, "");
131b3ad0 121 while (++MARK <= SP) {
d4b87e75 122 SV *msv = *MARK;
79a8d529 123 SV *sv;
d4b87e75 124
79a8d529 125 tryAMAGICregexp(msv);
d4b87e75 126
79a8d529
DM
127 if ((SvAMAGIC(tmpstr) || SvAMAGIC(msv)) &&
128 (sv = amagic_call(tmpstr, msv, concat_amg, AMGf_assign)))
129 {
130 sv_setsv(tmpstr, sv);
131 continue;
131b3ad0 132 }
a9984b10 133 sv_catsv_nomg(tmpstr, msv);
131b3ad0
DM
134 }
135 SvSETMAGIC(tmpstr);
136 SP = ORIGMARK;
137 }
d4b87e75 138 else {
131b3ad0 139 tmpstr = POPs;
d4b87e75
BM
140 tryAMAGICregexp(tmpstr);
141 }
142
143#undef tryAMAGICregexp
513629ba 144
b3eb6a9b 145 if (SvROK(tmpstr)) {
d8f6592e 146 SV * const sv = SvRV(tmpstr);
5c35adbb 147 if (SvTYPE(sv) == SVt_REGEXP)
d2f13c59 148 re = (REGEXP*) sv;
c277df42 149 }
d4b87e75
BM
150 else if (SvTYPE(tmpstr) == SVt_REGEXP)
151 re = (REGEXP*) tmpstr;
152
5c35adbb 153 if (re) {
69dc4b30
FC
154 /* The match's LHS's get-magic might need to access this op's reg-
155 exp (as is sometimes the case with $'; see bug 70764). So we
156 must call get-magic now before we replace the regexp. Hopeful-
157 ly this hack can be replaced with the approach described at
158 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03
159 /msg122415.html some day. */
455d9033
FC
160 if(pm->op_type == OP_MATCH) {
161 SV *lhs;
162 const bool was_tainted = PL_tainted;
163 if (pm->op_flags & OPf_STACKED)
69dc4b30 164 lhs = TOPs;
455d9033
FC
165 else if (pm->op_private & OPpTARGET_MY)
166 lhs = PAD_SV(pm->op_targ);
167 else lhs = DEFSV;
168 SvGETMAGIC(lhs);
169 /* Restore the previous value of PL_tainted (which may have been
170 modified by get-magic), to avoid incorrectly setting the
171 RXf_TAINTED flag further down. */
172 PL_tainted = was_tainted;
173 }
69dc4b30 174
f0826785 175 re = reg_temp_copy(NULL, re);
aaa362c4 176 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 177 PM_SETRE(pm, re);
c277df42
IZ
178 }
179 else {
f3ec07c7
DM
180 STRLEN len = 0;
181 const char *t = SvOK(tmpstr) ? SvPV_nomg_const(tmpstr, len) : "";
182
c737faaf 183 re = PM_GETRE(pm);
14a49a24 184 assert (re != (REGEXP*) &PL_sv_undef);
c277df42 185
20408e3c 186 /* Check against the last compiled regexp. */
a11c8683 187 if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
220fc49f 188 memNE(RX_PRECOMP(re), t, len))
85aff577 189 {
07bc277f 190 const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
73134a2e 191 U32 pm_flags = pm->op_pmflags & RXf_PMf_COMPILETIME;
d8f6592e
AL
192 if (re) {
193 ReREFCNT_dec(re);
14a49a24
NC
194#ifdef USE_ITHREADS
195 PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
196#else
4608196e 197 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
14a49a24 198#endif
1e2e3d02 199 } else if (PL_curcop->cop_hints_hash) {
20439bc7 200 SV *ptr = cop_hints_fetch_pvs(PL_curcop, "regcomp", 0);
1e2e3d02
YO
201 if (ptr && SvIOK(ptr) && SvIV(ptr))
202 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 203 }
664e119d 204
533c011a 205 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 206 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 207
15d9c083 208 if (!DO_UTF8(tmpstr) && SvUTF8(tmpstr)) {
b9ad30b4
NC
209 /* Not doing UTF-8, despite what the SV says. Is this only if
210 we're trapped in use 'bytes'? */
211 /* Make a copy of the octet sequence, but without the flag on,
212 as the compiler now honours the SvUTF8 flag on tmpstr. */
213 STRLEN len;
214 const char *const p = SvPV(tmpstr, len);
215 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
216 }
3e102237 217 else if (SvAMAGIC(tmpstr) || SvGMAGICAL(tmpstr)) {
f3ec07c7 218 /* make a copy to avoid extra stringifies */
0479a84a 219 tmpstr = newSVpvn_flags(t, len, SVs_TEMP | SvUTF8(tmpstr));
f3ec07c7 220 }
c737faaf 221
5a8697a7 222 if (eng)
3ab4a224 223 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
5a8697a7 224 else
3ab4a224 225 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 226
f86aaa29 227 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 228 inside tie/overload accessors. */
c277df42 229 }
4633a7c4 230 }
c737faaf
YO
231
232 re = PM_GETRE(pm);
a0d0e21e 233
72311751 234#ifndef INCOMPLETE_TAINTS
3280af22 235 if (PL_tainting) {
9274aefd
DM
236 if (PL_tainted) {
237 SvTAINTED_on((SV*)re);
07bc277f 238 RX_EXTFLAGS(re) |= RXf_TAINTED;
9274aefd 239 }
72311751
GS
240 }
241#endif
242
220fc49f 243 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 244 pm = PL_curpm;
a0d0e21e 245
c737faaf
YO
246
247#if !defined(USE_ITHREADS)
248 /* can't change the optree at runtime either */
249 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 250 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 251 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 252 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 253 }
c737faaf 254#endif
a0d0e21e
LW
255 RETURN;
256}
257
258PP(pp_substcont)
259{
97aff369 260 dVAR;
39644a26 261 dSP;
c09156bb 262 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
263 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
264 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
265 register char *s = cx->sb_s;
266 register char *m = cx->sb_m;
267 char *orig = cx->sb_orig;
901017d6 268 register REGEXP * const rx = cx->sb_rx;
c445ea15 269 SV *nsv = NULL;
988e6e7e 270 REGEXP *old = PM_GETRE(pm);
f410a211
NC
271
272 PERL_ASYNC_CHECK();
273
988e6e7e 274 if(old != rx) {
bfed75c6 275 if(old)
988e6e7e 276 ReREFCNT_dec(old);
d6106309 277 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
278 }
279
d9f97599 280 rxres_restore(&cx->sb_rxres, rx);
01b35787 281 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 282
a0d0e21e 283 if (cx->sb_iters++) {
a3b680e6 284 const I32 saviters = cx->sb_iters;
a0d0e21e 285 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 286 DIE(aTHX_ "Substitution loop");
a0d0e21e 287
447ee134
DM
288 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
289
ef07e810 290 /* See "how taint works" above pp_subst() */
20be6587
DM
291 if (SvTAINTED(TOPs))
292 cx->sb_rxtainted |= SUBST_TAINT_REPL;
447ee134 293 sv_catsv_nomg(dstr, POPs);
2c296965
YO
294 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
295 s -= RX_GOFS(rx);
a0d0e21e
LW
296
297 /* Are we done */
134b8cd8
NC
298 /* I believe that we can't set REXEC_SCREAM here if
299 SvSCREAM(cx->sb_targ) is true because SvPVX(cx->sb_targ) isn't always
300 equal to s. [See the comment before Perl_re_intuit_start(), which is
301 called from Perl_regexec_flags(), which says that it should be when
302 SvSCREAM() is true.] s, cx->sb_strend and orig will be consistent
303 with SvPVX(cx->sb_targ), as substconst doesn't modify cx->sb_targ
304 during the match. */
2c296965
YO
305 if (CxONCE(cx) || s < orig ||
306 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
307 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
308 ((cx->sb_rflags & REXEC_COPY_STR)
309 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
310 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 311 {
8ca8a454 312 SV *targ = cx->sb_targ;
748a9306 313
078c425b
JH
314 assert(cx->sb_strend >= s);
315 if(cx->sb_strend > s) {
316 if (DO_UTF8(dstr) && !SvUTF8(targ))
317 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
318 else
319 sv_catpvn(dstr, s, cx->sb_strend - s);
320 }
20be6587
DM
321 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
322 cx->sb_rxtainted |= SUBST_TAINT_PAT;
9212bbba 323
8ca8a454
NC
324 if (pm->op_pmflags & PMf_NONDESTRUCT) {
325 PUSHs(dstr);
326 /* From here on down we're using the copy, and leaving the
327 original untouched. */
328 targ = dstr;
329 }
330 else {
f8c7b90f 331#ifdef PERL_OLD_COPY_ON_WRITE
8ca8a454
NC
332 if (SvIsCOW(targ)) {
333 sv_force_normal_flags(targ, SV_COW_DROP_PV);
334 } else
ed252734 335#endif
8ca8a454
NC
336 {
337 SvPV_free(targ);
338 }
339 SvPV_set(targ, SvPVX(dstr));
340 SvCUR_set(targ, SvCUR(dstr));
341 SvLEN_set(targ, SvLEN(dstr));
342 if (DO_UTF8(dstr))
343 SvUTF8_on(targ);
344 SvPV_set(dstr, NULL);
345
4f4d7508 346 mPUSHi(saviters - 1);
48c036b1 347
8ca8a454
NC
348 (void)SvPOK_only_UTF8(targ);
349 }
5cd24f17 350
20be6587 351 /* update the taint state of various various variables in
ef07e810
DM
352 * preparation for final exit.
353 * See "how taint works" above pp_subst() */
20be6587
DM
354 if (PL_tainting) {
355 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
356 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
357 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
358 )
359 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
360
361 if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
362 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
363 )
364 SvTAINTED_on(TOPs); /* taint return value */
365 /* needed for mg_set below */
366 PL_tainted = cBOOL(cx->sb_rxtainted &
367 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL));
368 SvTAINT(TARG);
369 }
370 /* PL_tainted must be correctly set for this mg_set */
371 SvSETMAGIC(TARG);
372 TAINT_NOT;
4633a7c4 373 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
374 POPSUBST(cx);
375 RETURNOP(pm->op_next);
20be6587 376 /* NOTREACHED */
a0d0e21e 377 }
8e5e9ebe 378 cx->sb_iters = saviters;
a0d0e21e 379 }
07bc277f 380 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
381 m = s;
382 s = orig;
07bc277f 383 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
384 s = orig + (m - s);
385 cx->sb_strend = s + (cx->sb_strend - m);
386 }
07bc277f 387 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 388 if (m > s) {
bfed75c6 389 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
390 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
391 else
392 sv_catpvn(dstr, s, m-s);
393 }
07bc277f 394 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 395 { /* Update the pos() information. */
8ca8a454
NC
396 SV * const sv
397 = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
084916e3 398 MAGIC *mg;
7a7f3e45 399 SvUPGRADE(sv, SVt_PVMG);
14befaf4 400 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 401#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 402 if (SvIsCOW(sv))
d83f0a82
NC
403 sv_force_normal_flags(sv, 0);
404#endif
405 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
406 NULL, 0);
084916e3 407 }
ce474962 408 mg->mg_len = m - orig;
084916e3 409 }
988e6e7e 410 if (old != rx)
d6106309 411 (void)ReREFCNT_inc(rx);
20be6587 412 /* update the taint state of various various variables in preparation
ef07e810
DM
413 * for calling the code block.
414 * See "how taint works" above pp_subst() */
20be6587
DM
415 if (PL_tainting) {
416 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
417 cx->sb_rxtainted |= SUBST_TAINT_PAT;
418
419 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
420 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
421 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
422 )
423 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
424
425 if (cx->sb_iters > 1 && (cx->sb_rxtainted &
426 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
8ca8a454
NC
427 SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
428 ? cx->sb_dstr : cx->sb_targ);
20be6587
DM
429 TAINT_NOT;
430 }
d9f97599 431 rxres_save(&cx->sb_rxres, rx);
af9838cc 432 PL_curpm = pm;
29f2e912 433 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
434}
435
c90c0ff4 436void
864dbfa3 437Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
438{
439 UV *p = (UV*)*rsp;
440 U32 i;
7918f24d
NC
441
442 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 443 PERL_UNUSED_CONTEXT;
c90c0ff4 444
07bc277f 445 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 446#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 447 i = 7 + RX_NPARENS(rx) * 2;
ed252734 448#else
07bc277f 449 i = 6 + RX_NPARENS(rx) * 2;
ed252734 450#endif
c90c0ff4 451 if (!p)
a02a5408 452 Newx(p, i, UV);
c90c0ff4
PP
453 else
454 Renew(p, i, UV);
455 *rsp = (void*)p;
456 }
457
07bc277f 458 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 459 RX_MATCH_COPIED_off(rx);
c90c0ff4 460
f8c7b90f 461#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
462 *p++ = PTR2UV(RX_SAVED_COPY(rx));
463 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
464#endif
465
07bc277f 466 *p++ = RX_NPARENS(rx);
c90c0ff4 467
07bc277f
NC
468 *p++ = PTR2UV(RX_SUBBEG(rx));
469 *p++ = (UV)RX_SUBLEN(rx);
470 for (i = 0; i <= RX_NPARENS(rx); ++i) {
471 *p++ = (UV)RX_OFFS(rx)[i].start;
472 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
473 }
474}
475
9c105995
NC
476static void
477S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
478{
479 UV *p = (UV*)*rsp;
480 U32 i;
7918f24d
NC
481
482 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 483 PERL_UNUSED_CONTEXT;
c90c0ff4 484
ed252734 485 RX_MATCH_COPY_FREE(rx);
cf93c79d 486 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
487 *p++ = 0;
488
f8c7b90f 489#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
490 if (RX_SAVED_COPY(rx))
491 SvREFCNT_dec (RX_SAVED_COPY(rx));
492 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
493 *p++ = 0;
494#endif
495
07bc277f 496 RX_NPARENS(rx) = *p++;
c90c0ff4 497
07bc277f
NC
498 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
499 RX_SUBLEN(rx) = (I32)(*p++);
500 for (i = 0; i <= RX_NPARENS(rx); ++i) {
501 RX_OFFS(rx)[i].start = (I32)(*p++);
502 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
503 }
504}
505
9c105995
NC
506static void
507S_rxres_free(pTHX_ void **rsp)
c90c0ff4 508{
44f8325f 509 UV * const p = (UV*)*rsp;
7918f24d
NC
510
511 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 512 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
513
514 if (p) {
94010e71
NC
515#ifdef PERL_POISON
516 void *tmp = INT2PTR(char*,*p);
517 Safefree(tmp);
518 if (*p)
7e337ee0 519 PoisonFree(*p, 1, sizeof(*p));
94010e71 520#else
56431972 521 Safefree(INT2PTR(char*,*p));
94010e71 522#endif
f8c7b90f 523#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
524 if (p[1]) {
525 SvREFCNT_dec (INT2PTR(SV*,p[1]));
526 }
527#endif
c90c0ff4 528 Safefree(p);
4608196e 529 *rsp = NULL;
c90c0ff4
PP
530 }
531}
532
a701009a
DM
533#define FORM_NUM_BLANK (1<<30)
534#define FORM_NUM_POINT (1<<29)
535
a0d0e21e
LW
536PP(pp_formline)
537{
97aff369 538 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 539 register SV * const tmpForm = *++MARK;
086b26f3
DM
540 SV *formsv; /* contains text of original format */
541 register U32 *fpc; /* format ops program counter */
542 register char *t; /* current append position in target string */
543 const char *f; /* current position in format string */
a0d0e21e 544 register I32 arg;
086b26f3
DM
545 register SV *sv = NULL; /* current item */
546 const char *item = NULL;/* string value of current item */
547 I32 itemsize = 0; /* length of current item, possibly truncated */
548 I32 fieldsize = 0; /* width of current field */
549 I32 lines = 0; /* number of lines that have been output */
550 bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
551 const char *chophere = NULL; /* where to chop current item */
f5ada144 552 STRLEN linemark = 0; /* pos of start of line in output */
65202027 553 NV value;
086b26f3 554 bool gotsome = FALSE; /* seen at least one non-blank item on this line */
a0d0e21e 555 STRLEN len;
26e935cf 556 STRLEN linemax; /* estimate of output size in bytes */
1bd51a4c
IH
557 bool item_is_utf8 = FALSE;
558 bool targ_is_utf8 = FALSE;
bfed75c6 559 const char *fmt;
74e0ddf7 560 MAGIC *mg = NULL;
4ff700b9
DM
561 U8 *source; /* source of bytes to append */
562 STRLEN to_copy; /* how may bytes to append */
ea60cfe8 563 char trans; /* what chars to translate */
74e0ddf7 564
3808a683 565 mg = doparseform(tmpForm);
a0d0e21e 566
74e0ddf7 567 fpc = (U32*)mg->mg_ptr;
3808a683
DM
568 /* the actual string the format was compiled from.
569 * with overload etc, this may not match tmpForm */
570 formsv = mg->mg_obj;
571
74e0ddf7 572
3280af22 573 SvPV_force(PL_formtarget, len);
3808a683 574 if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
125b9982 575 SvTAINTED_on(PL_formtarget);
1bd51a4c
IH
576 if (DO_UTF8(PL_formtarget))
577 targ_is_utf8 = TRUE;
26e935cf
DM
578 linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
579 t = SvGROW(PL_formtarget, len + linemax + 1);
580 /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
a0d0e21e 581 t += len;
3808a683 582 f = SvPV_const(formsv, len);
a0d0e21e
LW
583
584 for (;;) {
585 DEBUG_f( {
bfed75c6 586 const char *name = "???";
a0d0e21e
LW
587 arg = -1;
588 switch (*fpc) {
589 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
590 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
591 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
592 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
593 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
594
595 case FF_CHECKNL: name = "CHECKNL"; break;
596 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
597 case FF_SPACE: name = "SPACE"; break;
598 case FF_HALFSPACE: name = "HALFSPACE"; break;
599 case FF_ITEM: name = "ITEM"; break;
600 case FF_CHOP: name = "CHOP"; break;
601 case FF_LINEGLOB: name = "LINEGLOB"; break;
602 case FF_NEWLINE: name = "NEWLINE"; break;
603 case FF_MORE: name = "MORE"; break;
604 case FF_LINEMARK: name = "LINEMARK"; break;
605 case FF_END: name = "END"; break;
bfed75c6 606 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 607 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
608 }
609 if (arg >= 0)
bf49b057 610 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 611 else
bf49b057 612 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 613 } );
a0d0e21e
LW
614 switch (*fpc++) {
615 case FF_LINEMARK:
f5ada144 616 linemark = t - SvPVX(PL_formtarget);
a0d0e21e
LW
617 lines++;
618 gotsome = FALSE;
619 break;
620
621 case FF_LITERAL:
ea60cfe8
DM
622 to_copy = *fpc++;
623 source = (U8 *)f;
624 f += to_copy;
625 trans = '~';
75645721 626 item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
ea60cfe8 627 goto append;
a0d0e21e
LW
628
629 case FF_SKIP:
630 f += *fpc++;
631 break;
632
633 case FF_FETCH:
634 arg = *fpc++;
635 f += arg;
636 fieldsize = arg;
637
638 if (MARK < SP)
639 sv = *++MARK;
640 else {
3280af22 641 sv = &PL_sv_no;
a2a5de95 642 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e 643 }
125b9982
NT
644 if (SvTAINTED(sv))
645 SvTAINTED_on(PL_formtarget);
a0d0e21e
LW
646 break;
647
648 case FF_CHECKNL:
5a34cab7
NC
649 {
650 const char *send;
651 const char *s = item = SvPV_const(sv, len);
652 itemsize = len;
653 if (DO_UTF8(sv)) {
654 itemsize = sv_len_utf8(sv);
655 if (itemsize != (I32)len) {
656 I32 itembytes;
657 if (itemsize > fieldsize) {
658 itemsize = fieldsize;
659 itembytes = itemsize;
660 sv_pos_u2b(sv, &itembytes, 0);
661 }
662 else
663 itembytes = len;
664 send = chophere = s + itembytes;
665 while (s < send) {
666 if (*s & ~31)
667 gotsome = TRUE;
668 else if (*s == '\n')
669 break;
670 s++;
671 }
672 item_is_utf8 = TRUE;
673 itemsize = s - item;
674 sv_pos_b2u(sv, &itemsize);
675 break;
a0ed51b3 676 }
a0ed51b3 677 }
5a34cab7
NC
678 item_is_utf8 = FALSE;
679 if (itemsize > fieldsize)
680 itemsize = fieldsize;
681 send = chophere = s + itemsize;
682 while (s < send) {
683 if (*s & ~31)
684 gotsome = TRUE;
685 else if (*s == '\n')
686 break;
687 s++;
688 }
689 itemsize = s - item;
690 break;
a0ed51b3 691 }
a0d0e21e
LW
692
693 case FF_CHECKCHOP:
5a34cab7
NC
694 {
695 const char *s = item = SvPV_const(sv, len);
696 itemsize = len;
697 if (DO_UTF8(sv)) {
698 itemsize = sv_len_utf8(sv);
699 if (itemsize != (I32)len) {
700 I32 itembytes;
701 if (itemsize <= fieldsize) {
702 const char *send = chophere = s + itemsize;
703 while (s < send) {
704 if (*s == '\r') {
705 itemsize = s - item;
a0ed51b3 706 chophere = s;
a0ed51b3 707 break;
5a34cab7
NC
708 }
709 if (*s++ & ~31)
a0ed51b3 710 gotsome = TRUE;
a0ed51b3 711 }
a0ed51b3 712 }
5a34cab7
NC
713 else {
714 const char *send;
715 itemsize = fieldsize;
716 itembytes = itemsize;
717 sv_pos_u2b(sv, &itembytes, 0);
718 send = chophere = s + itembytes;
719 while (s < send || (s == send && isSPACE(*s))) {
720 if (isSPACE(*s)) {
721 if (chopspace)
722 chophere = s;
723 if (*s == '\r')
724 break;
725 }
726 else {
727 if (*s & ~31)
728 gotsome = TRUE;
729 if (strchr(PL_chopset, *s))
730 chophere = s + 1;
731 }
732 s++;
733 }
734 itemsize = chophere - item;
735 sv_pos_b2u(sv, &itemsize);
736 }
737 item_is_utf8 = TRUE;
a0d0e21e
LW
738 break;
739 }
a0d0e21e 740 }
5a34cab7
NC
741 item_is_utf8 = FALSE;
742 if (itemsize <= fieldsize) {
743 const char *const send = chophere = s + itemsize;
744 while (s < send) {
745 if (*s == '\r') {
746 itemsize = s - item;
a0d0e21e 747 chophere = s;
a0d0e21e 748 break;
5a34cab7
NC
749 }
750 if (*s++ & ~31)
a0d0e21e 751 gotsome = TRUE;
a0d0e21e 752 }
a0d0e21e 753 }
5a34cab7
NC
754 else {
755 const char *send;
756 itemsize = fieldsize;
757 send = chophere = s + itemsize;
758 while (s < send || (s == send && isSPACE(*s))) {
759 if (isSPACE(*s)) {
760 if (chopspace)
761 chophere = s;
762 if (*s == '\r')
763 break;
764 }
765 else {
766 if (*s & ~31)
767 gotsome = TRUE;
768 if (strchr(PL_chopset, *s))
769 chophere = s + 1;
770 }
771 s++;
772 }
773 itemsize = chophere - item;
774 }
775 break;
a0d0e21e 776 }
a0d0e21e
LW
777
778 case FF_SPACE:
779 arg = fieldsize - itemsize;
780 if (arg) {
781 fieldsize -= arg;
782 while (arg-- > 0)
783 *t++ = ' ';
784 }
785 break;
786
787 case FF_HALFSPACE:
788 arg = fieldsize - itemsize;
789 if (arg) {
790 arg /= 2;
791 fieldsize -= arg;
792 while (arg-- > 0)
793 *t++ = ' ';
794 }
795 break;
796
797 case FF_ITEM:
8aa7beb6
DM
798 to_copy = itemsize;
799 source = (U8 *)item;
800 trans = 1;
801 if (item_is_utf8) {
802 /* convert to_copy from chars to bytes */
803 U8 *s = source;
804 while (to_copy--)
805 s += UTF8SKIP(s);
806 to_copy = s - source;
a0d0e21e 807 }
8aa7beb6 808 goto append;
a0d0e21e
LW
809
810 case FF_CHOP:
5a34cab7
NC
811 {
812 const char *s = chophere;
813 if (chopspace) {
af68e756 814 while (isSPACE(*s))
5a34cab7
NC
815 s++;
816 }
817 sv_chop(sv,s);
818 SvSETMAGIC(sv);
819 break;
a0d0e21e 820 }
a0d0e21e 821
a1b95068
LW
822 case FF_LINESNGL:
823 chopspace = 0;
a0d0e21e 824 case FF_LINEGLOB:
5a34cab7 825 {
e32383e2 826 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 827 const char *s = item = SvPV_const(sv, len);
7440a75b 828 const char *const send = s + len;
7440a75b 829
f3f2f1a3 830 item_is_utf8 = DO_UTF8(sv);
a1137ee5 831 if (!len)
7440a75b 832 break;
ea60cfe8 833 trans = 0;
0d21cefe 834 gotsome = TRUE;
a1137ee5 835 chophere = s + len;
4ff700b9
DM
836 source = (U8 *) s;
837 to_copy = len;
0d21cefe
DM
838 while (s < send) {
839 if (*s++ == '\n') {
840 if (oneline) {
841 to_copy = s - SvPVX_const(sv) - 1;
842 chophere = s;
843 break;
844 } else {
845 if (s == send) {
0d21cefe
DM
846 to_copy--;
847 } else
848 lines++;
1bd51a4c 849 }
a0d0e21e 850 }
0d21cefe 851 }
a2c0032b
DM
852 }
853
ea60cfe8
DM
854 append:
855 /* append to_copy bytes from source to PL_formstring.
856 * item_is_utf8 implies source is utf8.
857 * if trans, translate certain characters during the copy */
a2c0032b
DM
858 {
859 U8 *tmp = NULL;
26e935cf 860 STRLEN grow = 0;
0325ce87
DM
861
862 SvCUR_set(PL_formtarget,
863 t - SvPVX_const(PL_formtarget));
864
0d21cefe
DM
865 if (targ_is_utf8 && !item_is_utf8) {
866 source = tmp = bytes_to_utf8(source, &to_copy);
0d21cefe
DM
867 } else {
868 if (item_is_utf8 && !targ_is_utf8) {
f5ada144 869 U8 *s;
0d21cefe 870 /* Upgrade targ to UTF8, and then we reduce it to
0325ce87
DM
871 a problem we have a simple solution for.
872 Don't need get magic. */
0d21cefe 873 sv_utf8_upgrade_nomg(PL_formtarget);
0325ce87 874 targ_is_utf8 = TRUE;
f5ada144
DM
875 /* re-calculate linemark */
876 s = (U8*)SvPVX(PL_formtarget);
26e935cf
DM
877 /* the bytes we initially allocated to append the
878 * whole line may have been gobbled up during the
879 * upgrade, so allocate a whole new line's worth
880 * for safety */
881 grow = linemax;
f5ada144
DM
882 while (linemark--)
883 s += UTF8SKIP(s);
884 linemark = s - (U8*)SvPVX(PL_formtarget);
e8e72d41 885 }
0d21cefe
DM
886 /* Easy. They agree. */
887 assert (item_is_utf8 == targ_is_utf8);
888 }
26e935cf
DM
889 if (!trans)
890 /* @* and ^* are the only things that can exceed
891 * the linemax, so grow by the output size, plus
892 * a whole new form's worth in case of any further
893 * output */
894 grow = linemax + to_copy;
895 if (grow)
896 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
0d21cefe
DM
897 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
898
899 Copy(source, t, to_copy, char);
ea60cfe8 900 if (trans) {
8aa7beb6
DM
901 /* blank out ~ or control chars, depending on trans.
902 * works on bytes not chars, so relies on not
903 * matching utf8 continuation bytes */
ea60cfe8
DM
904 U8 *s = (U8*)t;
905 U8 *send = s + to_copy;
906 while (s < send) {
8aa7beb6
DM
907 const int ch = *s;
908 if (trans == '~' ? (ch == '~') :
909#ifdef EBCDIC
910 iscntrl(ch)
911#else
912 (!(ch & ~31))
913#endif
914 )
ea60cfe8
DM
915 *s = ' ';
916 s++;
917 }
918 }
919
0d21cefe
DM
920 t += to_copy;
921 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
a1137ee5 922 if (tmp)
0d21cefe 923 Safefree(tmp);
5a34cab7 924 break;
a0d0e21e 925 }
a0d0e21e 926
a1b95068
LW
927 case FF_0DECIMAL:
928 arg = *fpc++;
929#if defined(USE_LONG_DOUBLE)
10edeb5d 930 fmt = (const char *)
a701009a 931 ((arg & FORM_NUM_POINT) ?
10edeb5d 932 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 933#else
10edeb5d 934 fmt = (const char *)
a701009a 935 ((arg & FORM_NUM_POINT) ?
10edeb5d 936 "%#0*.*f" : "%0*.*f");
a1b95068
LW
937#endif
938 goto ff_dec;
a0d0e21e 939 case FF_DECIMAL:
a0d0e21e 940 arg = *fpc++;
65202027 941#if defined(USE_LONG_DOUBLE)
10edeb5d 942 fmt = (const char *)
a701009a 943 ((arg & FORM_NUM_POINT) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 944#else
10edeb5d 945 fmt = (const char *)
a701009a 946 ((arg & FORM_NUM_POINT) ? "%#*.*f" : "%*.*f");
65202027 947#endif
a1b95068 948 ff_dec:
784707d5
JP
949 /* If the field is marked with ^ and the value is undefined,
950 blank it out. */
a701009a 951 if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
784707d5
JP
952 arg = fieldsize;
953 while (arg--)
954 *t++ = ' ';
955 break;
956 }
957 gotsome = TRUE;
958 value = SvNV(sv);
a1b95068 959 /* overflow evidence */
bfed75c6 960 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
961 arg = fieldsize;
962 while (arg--)
963 *t++ = '#';
964 break;
965 }
784707d5
JP
966 /* Formats aren't yet marked for locales, so assume "yes". */
967 {
968 STORE_NUMERIC_STANDARD_SET_LOCAL();
a701009a
DM
969 arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
970 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg, value);
784707d5
JP
971 RESTORE_NUMERIC_STANDARD();
972 }
973 t += fieldsize;
974 break;
a1b95068 975
a0d0e21e
LW
976 case FF_NEWLINE:
977 f++;
f5ada144 978 while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
a0d0e21e
LW
979 t++;
980 *t++ = '\n';
981 break;
982
983 case FF_BLANK:
984 arg = *fpc++;
985 if (gotsome) {
986 if (arg) { /* repeat until fields exhausted? */
11f9eeaf
DM
987 fpc--;
988 goto end;
a0d0e21e
LW
989 }
990 }
991 else {
f5ada144 992 t = SvPVX(PL_formtarget) + linemark;
a0d0e21e
LW
993 lines--;
994 }
995 break;
996
997 case FF_MORE:
5a34cab7
NC
998 {
999 const char *s = chophere;
1000 const char *send = item + len;
1001 if (chopspace) {
af68e756 1002 while (isSPACE(*s) && (s < send))
5a34cab7 1003 s++;
a0d0e21e 1004 }
5a34cab7
NC
1005 if (s < send) {
1006 char *s1;
1007 arg = fieldsize - itemsize;
1008 if (arg) {
1009 fieldsize -= arg;
1010 while (arg-- > 0)
1011 *t++ = ' ';
1012 }
1013 s1 = t - 3;
1014 if (strnEQ(s1," ",3)) {
1015 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
1016 s1--;
1017 }
1018 *s1++ = '.';
1019 *s1++ = '.';
1020 *s1++ = '.';
a0d0e21e 1021 }
5a34cab7 1022 break;
a0d0e21e 1023 }
a0d0e21e 1024 case FF_END:
11f9eeaf 1025 end:
bf2bec63 1026 assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
a0d0e21e 1027 *t = '\0';
b15aece3 1028 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
1029 if (targ_is_utf8)
1030 SvUTF8_on(PL_formtarget);
3280af22 1031 FmLINES(PL_formtarget) += lines;
a0d0e21e 1032 SP = ORIGMARK;
11f9eeaf
DM
1033 if (fpc[-1] == FF_BLANK)
1034 RETURNOP(cLISTOP->op_first);
1035 else
1036 RETPUSHYES;
a0d0e21e
LW
1037 }
1038 }
1039}
1040
1041PP(pp_grepstart)
1042{
27da23d5 1043 dVAR; dSP;
a0d0e21e
LW
1044 SV *src;
1045
3280af22 1046 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 1047 (void)POPMARK;
54310121 1048 if (GIMME_V == G_SCALAR)
6e449a3a 1049 mXPUSHi(0);
533c011a 1050 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 1051 }
3280af22 1052 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
897d3989
NC
1053 Perl_pp_pushmark(aTHX); /* push dst */
1054 Perl_pp_pushmark(aTHX); /* push src */
d343c3ef 1055 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW
1056
1057 SAVETMPS;
59f00321
RGS
1058 if (PL_op->op_private & OPpGREP_LEX)
1059 SAVESPTR(PAD_SVl(PL_op->op_targ));
1060 else
1061 SAVE_DEFSV;
d343c3ef 1062 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1063 SAVEVPTR(PL_curpm);
a0d0e21e 1064
3280af22 1065 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 1066 SvTEMP_off(src);
59f00321
RGS
1067 if (PL_op->op_private & OPpGREP_LEX)
1068 PAD_SVl(PL_op->op_targ) = src;
1069 else
414bf5ae 1070 DEFSV_set(src);
a0d0e21e
LW
1071
1072 PUTBACK;
533c011a 1073 if (PL_op->op_type == OP_MAPSTART)
897d3989 1074 Perl_pp_pushmark(aTHX); /* push top */
533c011a 1075 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
1076}
1077
a0d0e21e
LW
1078PP(pp_mapwhile)
1079{
27da23d5 1080 dVAR; dSP;
f54cb97a 1081 const I32 gimme = GIMME_V;
544f3153 1082 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
1083 I32 count;
1084 I32 shift;
1085 SV** src;
ac27b0f5 1086 SV** dst;
a0d0e21e 1087
544f3153 1088 /* first, move source pointer to the next item in the source list */
3280af22 1089 ++PL_markstack_ptr[-1];
544f3153
GS
1090
1091 /* if there are new items, push them into the destination list */
4c90a460 1092 if (items && gimme != G_VOID) {
544f3153
GS
1093 /* might need to make room back there first */
1094 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1095 /* XXX this implementation is very pessimal because the stack
1096 * is repeatedly extended for every set of items. Is possible
1097 * to do this without any stack extension or copying at all
1098 * by maintaining a separate list over which the map iterates
18ef8bea 1099 * (like foreach does). --gsar */
544f3153
GS
1100
1101 /* everything in the stack after the destination list moves
1102 * towards the end the stack by the amount of room needed */
1103 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1104
1105 /* items to shift up (accounting for the moved source pointer) */
1106 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
1107
1108 /* This optimization is by Ben Tilly and it does
1109 * things differently from what Sarathy (gsar)
1110 * is describing. The downside of this optimization is
1111 * that leaves "holes" (uninitialized and hopefully unused areas)
1112 * to the Perl stack, but on the other hand this
1113 * shouldn't be a problem. If Sarathy's idea gets
1114 * implemented, this optimization should become
1115 * irrelevant. --jhi */
1116 if (shift < count)
1117 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1118
924508f0
GS
1119 EXTEND(SP,shift);
1120 src = SP;
1121 dst = (SP += shift);
3280af22
NIS
1122 PL_markstack_ptr[-1] += shift;
1123 *PL_markstack_ptr += shift;
544f3153 1124 while (count--)
a0d0e21e
LW
1125 *dst-- = *src--;
1126 }
544f3153 1127 /* copy the new items down to the destination list */
ac27b0f5 1128 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26 1129 if (gimme == G_ARRAY) {
b2a2a901
DM
1130 /* add returned items to the collection (making mortal copies
1131 * if necessary), then clear the current temps stack frame
1132 * *except* for those items. We do this splicing the items
1133 * into the start of the tmps frame (so some items may be on
59d53fd6 1134 * the tmps stack twice), then moving PL_tmps_floor above
b2a2a901
DM
1135 * them, then freeing the frame. That way, the only tmps that
1136 * accumulate over iterations are the return values for map.
1137 * We have to do to this way so that everything gets correctly
1138 * freed if we die during the map.
1139 */
1140 I32 tmpsbase;
1141 I32 i = items;
1142 /* make space for the slice */
1143 EXTEND_MORTAL(items);
1144 tmpsbase = PL_tmps_floor + 1;
1145 Move(PL_tmps_stack + tmpsbase,
1146 PL_tmps_stack + tmpsbase + items,
1147 PL_tmps_ix - PL_tmps_floor,
1148 SV*);
1149 PL_tmps_ix += items;
1150
1151 while (i-- > 0) {
1152 SV *sv = POPs;
1153 if (!SvTEMP(sv))
1154 sv = sv_mortalcopy(sv);
1155 *dst-- = sv;
1156 PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
1157 }
1158 /* clear the stack frame except for the items */
1159 PL_tmps_floor += items;
1160 FREETMPS;
1161 /* FREETMPS may have cleared the TEMP flag on some of the items */
1162 i = items;
1163 while (i-- > 0)
1164 SvTEMP_on(PL_tmps_stack[--tmpsbase]);
22023b26 1165 }
bfed75c6 1166 else {
22023b26
TP
1167 /* scalar context: we don't care about which values map returns
1168 * (we use undef here). And so we certainly don't want to do mortal
1169 * copies of meaningless values. */
1170 while (items-- > 0) {
b988aa42 1171 (void)POPs;
22023b26
TP
1172 *dst-- = &PL_sv_undef;
1173 }
b2a2a901 1174 FREETMPS;
22023b26 1175 }
a0d0e21e 1176 }
b2a2a901
DM
1177 else {
1178 FREETMPS;
1179 }
d343c3ef 1180 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW
1181
1182 /* All done yet? */
3280af22 1183 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1184
1185 (void)POPMARK; /* pop top */
d343c3ef 1186 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1187 (void)POPMARK; /* pop src */
3280af22 1188 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1189 (void)POPMARK; /* pop dst */
3280af22 1190 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1191 if (gimme == G_SCALAR) {
7cc47870
RGS
1192 if (PL_op->op_private & OPpGREP_LEX) {
1193 SV* sv = sv_newmortal();
1194 sv_setiv(sv, items);
1195 PUSHs(sv);
1196 }
1197 else {
1198 dTARGET;
1199 XPUSHi(items);
1200 }
a0d0e21e 1201 }
54310121
PP
1202 else if (gimme == G_ARRAY)
1203 SP += items;
a0d0e21e
LW
1204 RETURN;
1205 }
1206 else {
1207 SV *src;
1208
d343c3ef 1209 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1210 SAVEVPTR(PL_curpm);
a0d0e21e 1211
544f3153 1212 /* set $_ to the new source item */
3280af22 1213 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1214 SvTEMP_off(src);
59f00321
RGS
1215 if (PL_op->op_private & OPpGREP_LEX)
1216 PAD_SVl(PL_op->op_targ) = src;
1217 else
414bf5ae 1218 DEFSV_set(src);
a0d0e21e
LW
1219
1220 RETURNOP(cLOGOP->op_other);
1221 }
1222}
1223
a0d0e21e
LW
1224/* Range stuff. */
1225
1226PP(pp_range)
1227{
97aff369 1228 dVAR;
a0d0e21e 1229 if (GIMME == G_ARRAY)
1a67a97c 1230 return NORMAL;
538573f7 1231 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1232 return cLOGOP->op_other;
538573f7 1233 else
1a67a97c 1234 return NORMAL;
a0d0e21e
LW
1235}
1236
1237PP(pp_flip)
1238{
97aff369 1239 dVAR;
39644a26 1240 dSP;
a0d0e21e
LW
1241
1242 if (GIMME == G_ARRAY) {
1a67a97c 1243 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1244 }
1245 else {
1246 dTOPss;
44f8325f 1247 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1248 int flip = 0;
790090df 1249
bfed75c6 1250 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1251 if (GvIO(PL_last_in_gv)) {
1252 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1253 }
1254 else {
fafc274c 1255 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1256 if (gv && GvSV(gv))
1257 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1258 }
bfed75c6
AL
1259 } else {
1260 flip = SvTRUE(sv);
1261 }
1262 if (flip) {
a0d0e21e 1263 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1264 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1265 sv_setiv(targ, 1);
3e3baf6d 1266 SETs(targ);
a0d0e21e
LW
1267 RETURN;
1268 }
1269 else {
1270 sv_setiv(targ, 0);
924508f0 1271 SP--;
1a67a97c 1272 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1273 }
1274 }
76f68e9b 1275 sv_setpvs(TARG, "");
a0d0e21e
LW
1276 SETs(targ);
1277 RETURN;
1278 }
1279}
1280
8e9bbdb9
RGS
1281/* This code tries to decide if "$left .. $right" should use the
1282 magical string increment, or if the range is numeric (we make
1283 an exception for .."0" [#18165]). AMS 20021031. */
1284
1285#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1286 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1287 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1288 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1289 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1290 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1291
a0d0e21e
LW
1292PP(pp_flop)
1293{
97aff369 1294 dVAR; dSP;
a0d0e21e
LW
1295
1296 if (GIMME == G_ARRAY) {
1297 dPOPPOPssrl;
86cb7173 1298
5b295bef
RD
1299 SvGETMAGIC(left);
1300 SvGETMAGIC(right);
a0d0e21e 1301
8e9bbdb9 1302 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1303 register IV i, j;
1304 IV max;
f52e41ad
FC
1305 if ((SvOK(left) && SvNV_nomg(left) < IV_MIN) ||
1306 (SvOK(right) && SvNV_nomg(right) > IV_MAX))
d470f89e 1307 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
1308 i = SvIV_nomg(left);
1309 max = SvIV_nomg(right);
bbce6d69 1310 if (max >= i) {
c1ab3db2
AK
1311 j = max - i + 1;
1312 EXTEND_MORTAL(j);
1313 EXTEND(SP, j);
bbce6d69 1314 }
c1ab3db2
AK
1315 else
1316 j = 0;
1317 while (j--) {
901017d6 1318 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1319 PUSHs(sv);
1320 }
1321 }
1322 else {
3c323193
FC
1323 STRLEN len, llen;
1324 const char * const lpv = SvPV_nomg_const(left, llen);
f52e41ad 1325 const char * const tmps = SvPV_nomg_const(right, len);
a0d0e21e 1326
3c323193 1327 SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP);
89ea2908 1328 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1329 XPUSHs(sv);
b15aece3 1330 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1331 break;
a0d0e21e
LW
1332 sv = sv_2mortal(newSVsv(sv));
1333 sv_inc(sv);
1334 }
a0d0e21e
LW
1335 }
1336 }
1337 else {
1338 dTOPss;
901017d6 1339 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1340 int flop = 0;
a0d0e21e 1341 sv_inc(targ);
4e3399f9
YST
1342
1343 if (PL_op->op_private & OPpFLIP_LINENUM) {
1344 if (GvIO(PL_last_in_gv)) {
1345 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1346 }
1347 else {
fafc274c 1348 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1349 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1350 }
1351 }
1352 else {
1353 flop = SvTRUE(sv);
1354 }
1355
1356 if (flop) {
a0d0e21e 1357 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1358 sv_catpvs(targ, "E0");
a0d0e21e
LW
1359 }
1360 SETs(targ);
1361 }
1362
1363 RETURN;
1364}
1365
1366/* Control. */
1367
27da23d5 1368static const char * const context_name[] = {
515afda2 1369 "pseudo-block",
f31522f3 1370 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1371 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1372 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1373 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1374 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1375 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1376 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1377 "subroutine",
76753e7f 1378 "format",
515afda2 1379 "eval",
515afda2 1380 "substitution",
515afda2
NC
1381};
1382
76e3520e 1383STATIC I32
06b5626a 1384S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1385{
97aff369 1386 dVAR;
a0d0e21e 1387 register I32 i;
a0d0e21e 1388
7918f24d
NC
1389 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1390
a0d0e21e 1391 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1392 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1393 switch (CxTYPE(cx)) {
a0d0e21e 1394 case CXt_SUBST:
a0d0e21e 1395 case CXt_SUB:
7766f137 1396 case CXt_FORMAT:
a0d0e21e 1397 case CXt_EVAL:
0a753a76 1398 case CXt_NULL:
a2a5de95
NC
1399 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1400 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1401 if (CxTYPE(cx) == CXt_NULL)
1402 return -1;
1403 break;
c6fdafd0 1404 case CXt_LOOP_LAZYIV:
d01136d6 1405 case CXt_LOOP_LAZYSV:
3b719c58
NC
1406 case CXt_LOOP_FOR:
1407 case CXt_LOOP_PLAIN:
7e8f1eac
AD
1408 {
1409 const char *cx_label = CxLABEL(cx);
1410 if (!cx_label || strNE(label, cx_label) ) {
1c98cc53 1411 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1412 (long)i, cx_label));
a0d0e21e
LW
1413 continue;
1414 }
1c98cc53 1415 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1416 return i;
7e8f1eac 1417 }
a0d0e21e
LW
1418 }
1419 }
1420 return i;
1421}
1422
0d863452
RH
1423
1424
e50aee73 1425I32
864dbfa3 1426Perl_dowantarray(pTHX)
e50aee73 1427{
97aff369 1428 dVAR;
f54cb97a 1429 const I32 gimme = block_gimme();
54310121
PP
1430 return (gimme == G_VOID) ? G_SCALAR : gimme;
1431}
1432
1433I32
864dbfa3 1434Perl_block_gimme(pTHX)
54310121 1435{
97aff369 1436 dVAR;
06b5626a 1437 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1438 if (cxix < 0)
46fc3d4c 1439 return G_VOID;
e50aee73 1440
54310121 1441 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1442 case G_VOID:
1443 return G_VOID;
54310121 1444 case G_SCALAR:
e50aee73 1445 return G_SCALAR;
54310121
PP
1446 case G_ARRAY:
1447 return G_ARRAY;
1448 default:
cea2e8a9 1449 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1450 /* NOTREACHED */
1451 return 0;
54310121 1452 }
e50aee73
AD
1453}
1454
78f9721b
SM
1455I32
1456Perl_is_lvalue_sub(pTHX)
1457{
97aff369 1458 dVAR;
06b5626a 1459 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1460 assert(cxix >= 0); /* We should only be called from inside subs */
1461
bafb2adc
NC
1462 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1463 return CxLVAL(cxstack + cxix);
78f9721b
SM
1464 else
1465 return 0;
1466}
1467
777d9014
FC
1468/* only used by PUSHSUB */
1469I32
1470Perl_was_lvalue_sub(pTHX)
1471{
1472 dVAR;
1473 const I32 cxix = dopoptosub(cxstack_ix-1);
1474 assert(cxix >= 0); /* We should only be called from inside subs */
1475
1476 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1477 return CxLVAL(cxstack + cxix);
1478 else
1479 return 0;
1480}
1481
76e3520e 1482STATIC I32
901017d6 1483S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1484{
97aff369 1485 dVAR;
a0d0e21e 1486 I32 i;
7918f24d
NC
1487
1488 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1489
a0d0e21e 1490 for (i = startingblock; i >= 0; i--) {
901017d6 1491 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1492 switch (CxTYPE(cx)) {
a0d0e21e
LW
1493 default:
1494 continue;
1495 case CXt_EVAL:
1496 case CXt_SUB:
7766f137 1497 case CXt_FORMAT:
1c98cc53 1498 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW
1499 return i;
1500 }
1501 }
1502 return i;
1503}
1504
76e3520e 1505STATIC I32
cea2e8a9 1506S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1507{
97aff369 1508 dVAR;
a0d0e21e 1509 I32 i;
a0d0e21e 1510 for (i = startingblock; i >= 0; i--) {
06b5626a 1511 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1512 switch (CxTYPE(cx)) {
a0d0e21e
LW
1513 default:
1514 continue;
1515 case CXt_EVAL:
1c98cc53 1516 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW
1517 return i;
1518 }
1519 }
1520 return i;
1521}
1522
76e3520e 1523STATIC I32
cea2e8a9 1524S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1525{
97aff369 1526 dVAR;
a0d0e21e 1527 I32 i;
a0d0e21e 1528 for (i = startingblock; i >= 0; i--) {
901017d6 1529 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1530 switch (CxTYPE(cx)) {
a0d0e21e 1531 case CXt_SUBST:
a0d0e21e 1532 case CXt_SUB:
7766f137 1533 case CXt_FORMAT:
a0d0e21e 1534 case CXt_EVAL:
0a753a76 1535 case CXt_NULL:
a2a5de95
NC
1536 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1537 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1538 if ((CxTYPE(cx)) == CXt_NULL)
1539 return -1;
1540 break;
c6fdafd0 1541 case CXt_LOOP_LAZYIV:
d01136d6 1542 case CXt_LOOP_LAZYSV:
3b719c58
NC
1543 case CXt_LOOP_FOR:
1544 case CXt_LOOP_PLAIN:
1c98cc53 1545 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW
1546 return i;
1547 }
1548 }
1549 return i;
1550}
1551
0d863452
RH
1552STATIC I32
1553S_dopoptogiven(pTHX_ I32 startingblock)
1554{
97aff369 1555 dVAR;
0d863452
RH
1556 I32 i;
1557 for (i = startingblock; i >= 0; i--) {
1558 register const PERL_CONTEXT *cx = &cxstack[i];
1559 switch (CxTYPE(cx)) {
1560 default:
1561 continue;
1562 case CXt_GIVEN:
1c98cc53 1563 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1564 return i;
3b719c58
NC
1565 case CXt_LOOP_PLAIN:
1566 assert(!CxFOREACHDEF(cx));
1567 break;
c6fdafd0 1568 case CXt_LOOP_LAZYIV:
d01136d6 1569 case CXt_LOOP_LAZYSV:
3b719c58 1570 case CXt_LOOP_FOR:
0d863452 1571 if (CxFOREACHDEF(cx)) {
1c98cc53 1572 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH
1573 return i;
1574 }
1575 }
1576 }
1577 return i;
1578}
1579
1580STATIC I32
1581S_dopoptowhen(pTHX_ I32 startingblock)
1582{
97aff369 1583 dVAR;
0d863452
RH
1584 I32 i;
1585 for (i = startingblock; i >= 0; i--) {
1586 register const PERL_CONTEXT *cx = &cxstack[i];
1587 switch (CxTYPE(cx)) {
1588 default:
1589 continue;
1590 case CXt_WHEN:
1c98cc53 1591 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH
1592 return i;
1593 }
1594 }
1595 return i;
1596}
1597
a0d0e21e 1598void
864dbfa3 1599Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1600{
97aff369 1601 dVAR;
a0d0e21e
LW
1602 I32 optype;
1603
f144f1e3
DM
1604 if (!PL_curstackinfo) /* can happen if die during thread cloning */
1605 return;
1606
a0d0e21e 1607 while (cxstack_ix > cxix) {
b0d9ce38 1608 SV *sv;
06b5626a 1609 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1610 DEBUG_CX("UNWIND"); \
a0d0e21e 1611 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1612 switch (CxTYPE(cx)) {
c90c0ff4
PP
1613 case CXt_SUBST:
1614 POPSUBST(cx);
1615 continue; /* not break */
a0d0e21e 1616 case CXt_SUB:
b0d9ce38
GS
1617 POPSUB(cx,sv);
1618 LEAVESUB(sv);
a0d0e21e
LW
1619 break;
1620 case CXt_EVAL:
1621 POPEVAL(cx);
1622 break;
c6fdafd0 1623 case CXt_LOOP_LAZYIV:
d01136d6 1624 case CXt_LOOP_LAZYSV:
3b719c58
NC
1625 case CXt_LOOP_FOR:
1626 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1627 POPLOOP(cx);
1628 break;
0a753a76 1629 case CXt_NULL:
a0d0e21e 1630 break;
7766f137
GS
1631 case CXt_FORMAT:
1632 POPFORMAT(cx);
1633 break;
a0d0e21e 1634 }
c90c0ff4 1635 cxstack_ix--;
a0d0e21e 1636 }
1b6737cc 1637 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1638}
1639
5a844595
GS
1640void
1641Perl_qerror(pTHX_ SV *err)
1642{
97aff369 1643 dVAR;
7918f24d
NC
1644
1645 PERL_ARGS_ASSERT_QERROR;
1646
6b2fb389
DM
1647 if (PL_in_eval) {
1648 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1649 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1650 SVfARG(err));
6b2fb389
DM
1651 }
1652 else
1653 sv_catsv(ERRSV, err);
1654 }
5a844595
GS
1655 else if (PL_errors)
1656 sv_catsv(PL_errors, err);
1657 else
be2597df 1658 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1659 if (PL_parser)
1660 ++PL_parser->error_count;
5a844595
GS
1661}
1662
bb4c52e0 1663void
c5df3096 1664Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1665{
27da23d5 1666 dVAR;
c5df3096 1667 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1668 U8 in_eval = PL_in_eval;
c5df3096 1669 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1670
96d9b9cd 1671 if (in_eval) {
a0d0e21e 1672 I32 cxix;
a0d0e21e 1673 I32 gimme;
a0d0e21e 1674
22a30693
Z
1675 /*
1676 * Historically, perl used to set ERRSV ($@) early in the die
1677 * process and rely on it not getting clobbered during unwinding.
1678 * That sucked, because it was liable to get clobbered, so the
1679 * setting of ERRSV used to emit the exception from eval{} has
1680 * been moved to much later, after unwinding (see just before
1681 * JMPENV_JUMP below). However, some modules were relying on the
1682 * early setting, by examining $@ during unwinding to use it as
1683 * a flag indicating whether the current unwinding was caused by
1684 * an exception. It was never a reliable flag for that purpose,
1685 * being totally open to false positives even without actual
1686 * clobberage, but was useful enough for production code to
1687 * semantically rely on it.
1688 *
1689 * We'd like to have a proper introspective interface that
1690 * explicitly describes the reason for whatever unwinding
1691 * operations are currently in progress, so that those modules
1692 * work reliably and $@ isn't further overloaded. But we don't
1693 * have one yet. In its absence, as a stopgap measure, ERRSV is
1694 * now *additionally* set here, before unwinding, to serve as the
1695 * (unreliable) flag that it used to.
1696 *
1697 * This behaviour is temporary, and should be removed when a
1698 * proper way to detect exceptional unwinding has been developed.
1699 * As of 2010-12, the authors of modules relying on the hack
1700 * are aware of the issue, because the modules failed on
1701 * perls 5.13.{1..7} which had late setting of $@ without this
1702 * early-setting hack.
1703 */
1704 if (!(in_eval & EVAL_KEEPERR)) {
1705 SvTEMP_off(exceptsv);
1706 sv_setsv(ERRSV, exceptsv);
1707 }
1708
5a844595
GS
1709 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1710 && PL_curstackinfo->si_prev)
1711 {
bac4b2ad 1712 dounwind(-1);
d3acc0f7 1713 POPSTACK;
bac4b2ad 1714 }
e336de0d 1715
a0d0e21e
LW
1716 if (cxix >= 0) {
1717 I32 optype;
b6494f15 1718 SV *namesv;
35a4481c 1719 register PERL_CONTEXT *cx;
901017d6 1720 SV **newsp;
8f89e5a9
Z
1721 COP *oldcop;
1722 JMPENV *restartjmpenv;
1723 OP *restartop;
a0d0e21e
LW
1724
1725 if (cxix < cxstack_ix)
1726 dounwind(cxix);
1727
3280af22 1728 POPBLOCK(cx,PL_curpm);
6b35e009 1729 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1730 STRLEN msglen;
96d9b9cd 1731 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1732 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1733 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1734 my_exit(1);
1735 }
1736 POPEVAL(cx);
b6494f15 1737 namesv = cx->blk_eval.old_namesv;
8f89e5a9
Z
1738 oldcop = cx->blk_oldcop;
1739 restartjmpenv = cx->blk_eval.cur_top_env;
1740 restartop = cx->blk_eval.retop;
a0d0e21e
LW
1741
1742 if (gimme == G_SCALAR)
3280af22
NIS
1743 *++newsp = &PL_sv_undef;
1744 PL_stack_sp = newsp;
a0d0e21e
LW
1745
1746 LEAVE;
748a9306 1747
7fb6a879
GS
1748 /* LEAVE could clobber PL_curcop (see save_re_context())
1749 * XXX it might be better to find a way to avoid messing with
1750 * PL_curcop in save_re_context() instead, but this is a more
1751 * minimal fix --GSAR */
8f89e5a9 1752 PL_curcop = oldcop;
7fb6a879 1753
7a2e2cd6 1754 if (optype == OP_REQUIRE) {
b6494f15 1755 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1756 SvPVX_const(namesv),
c60dbbc3 1757 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1758 &PL_sv_undef, 0);
27e90453
DM
1759 /* note that unlike pp_entereval, pp_require isn't
1760 * supposed to trap errors. So now that we've popped the
1761 * EVAL that pp_require pushed, and processed the error
1762 * message, rethrow the error */
ecad31f0
BF
1763 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1764 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1765 SVs_TEMP)));
7a2e2cd6 1766 }
c5df3096 1767 if (in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1768 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1769 SVfARG(exceptsv));
96d9b9cd
Z
1770 }
1771 else {
1772 sv_setsv(ERRSV, exceptsv);
1773 }
8f89e5a9
Z
1774 PL_restartjmpenv = restartjmpenv;
1775 PL_restartop = restartop;
bb4c52e0
GG
1776 JMPENV_JUMP(3);
1777 /* NOTREACHED */
a0d0e21e
LW
1778 }
1779 }
87582a92 1780
96d9b9cd 1781 write_to_stderr(exceptsv);
f86702cc
PP
1782 my_failure_exit();
1783 /* NOTREACHED */
a0d0e21e
LW
1784}
1785
1786PP(pp_xor)
1787{
97aff369 1788 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1789 if (SvTRUE(left) != SvTRUE(right))
1790 RETSETYES;
1791 else
1792 RETSETNO;
1793}
1794
8dff4fc5
BM
1795/*
1796=for apidoc caller_cx
1797
1798The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
1799returned C<PERL_CONTEXT> structure can be interrogated to find all the
1800information returned to Perl by C<caller>. Note that XSUBs don't get a
1801stack frame, so C<caller_cx(0, NULL)> will return information for the
1802immediately-surrounding Perl code.
1803
1804This function skips over the automatic calls to C<&DB::sub> made on the
1805behalf of the debugger. If the stack frame requested was a sub called by
1806C<DB::sub>, the return value will be the frame for the call to
1807C<DB::sub>, since that has the correct line number/etc. for the call
1808site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
1809frame for the sub call itself.
1810
1811=cut
1812*/
1813
1814const PERL_CONTEXT *
1815Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1816{
a0d0e21e 1817 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1818 register const PERL_CONTEXT *cx;
1819 register const PERL_CONTEXT *ccstack = cxstack;
1820 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1821
a0d0e21e 1822 for (;;) {
2c375eb9
GS
1823 /* we may be in a higher stacklevel, so dig down deeper */
1824 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1825 top_si = top_si->si_prev;
1826 ccstack = top_si->si_cxstack;
1827 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1828 }
8dff4fc5
BM
1829 if (cxix < 0)
1830 return NULL;
f2a7f298 1831 /* caller() should not report the automatic calls to &DB::sub */
1832 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1833 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1834 count++;
1835 if (!count--)
1836 break;
2c375eb9 1837 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1838 }
2c375eb9
GS
1839
1840 cx = &ccstack[cxix];
8dff4fc5
BM
1841 if (dbcxp) *dbcxp = cx;
1842
7766f137 1843 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1844 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1845 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1846 field below is defined for any cx. */
f2a7f298 1847 /* caller() should not report the automatic calls to &DB::sub */
1848 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1849 cx = &ccstack[dbcxix];
06a5b730
PP
1850 }
1851
8dff4fc5
BM
1852 return cx;
1853}
1854
1855PP(pp_caller)
1856{
1857 dVAR;
1858 dSP;
1859 register const PERL_CONTEXT *cx;
1860 const PERL_CONTEXT *dbcx;
1861 I32 gimme;
d527ce7c 1862 const HEK *stash_hek;
8dff4fc5 1863 I32 count = 0;
ce0b554b 1864 bool has_arg = MAXARG && TOPs;
8dff4fc5 1865
ce0b554b
FC
1866 if (MAXARG) {
1867 if (has_arg)
8dff4fc5 1868 count = POPi;
ce0b554b
FC
1869 else (void)POPs;
1870 }
8dff4fc5 1871
ce0b554b 1872 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5
BM
1873 if (!cx) {
1874 if (GIMME != G_ARRAY) {
1875 EXTEND(SP, 1);
1876 RETPUSHUNDEF;
1877 }
1878 RETURN;
1879 }
1880
d527ce7c 1881 stash_hek = HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop));
a0d0e21e 1882 if (GIMME != G_ARRAY) {
27d41816 1883 EXTEND(SP, 1);
d527ce7c 1884 if (!stash_hek)
3280af22 1885 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1886 else {
1887 dTARGET;
d527ce7c 1888 sv_sethek(TARG, stash_hek);
49d8d3a1
MB
1889 PUSHs(TARG);
1890 }
a0d0e21e
LW
1891 RETURN;
1892 }
a0d0e21e 1893
b3ca2e83 1894 EXTEND(SP, 11);
27d41816 1895
d527ce7c 1896 if (!stash_hek)
3280af22 1897 PUSHs(&PL_sv_undef);
d527ce7c
BF
1898 else {
1899 dTARGET;
1900 sv_sethek(TARG, stash_hek);
1901 PUSHTARG;
1902 }
6e449a3a
MHM
1903 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1904 mPUSHi((I32)CopLINE(cx->blk_oldcop));
ce0b554b 1905 if (!has_arg)
a0d0e21e 1906 RETURN;
7766f137 1907 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
8dff4fc5 1908 GV * const cvgv = CvGV(dbcx->blk_sub.cv);
7766f137 1909 /* So is ccstack[dbcxix]. */
07b8c804 1910 if (isGV(cvgv)) {
561b68a9 1911 SV * const sv = newSV(0);
c445ea15 1912 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1913 mPUSHs(sv);
bf38a478 1914 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1915 }
1916 else {
84bafc02 1917 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1918 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1919 }
a0d0e21e
LW
1920 }
1921 else {
84bafc02 1922 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1923 mPUSHi(0);
a0d0e21e 1924 }
54310121
PP
1925 gimme = (I32)cx->blk_gimme;
1926 if (gimme == G_VOID)
3280af22 1927 PUSHs(&PL_sv_undef);
54310121 1928 else
98625aca 1929 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1930 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1931 /* eval STRING */
85a64632 1932 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1933 PUSHs(cx->blk_eval.cur_text);
3280af22 1934 PUSHs(&PL_sv_no);
0f79a09d 1935 }
811a4de9 1936 /* require */
0f79a09d 1937 else if (cx->blk_eval.old_namesv) {
6e449a3a 1938 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1939 PUSHs(&PL_sv_yes);
06a5b730 1940 }
811a4de9
GS
1941 /* eval BLOCK (try blocks have old_namesv == 0) */
1942 else {
1943 PUSHs(&PL_sv_undef);
1944 PUSHs(&PL_sv_undef);
1945 }
4633a7c4 1946 }
a682de96
GS
1947 else {
1948 PUSHs(&PL_sv_undef);
1949 PUSHs(&PL_sv_undef);
1950 }
bafb2adc 1951 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1952 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1953 {
66a1b24b
AL
1954 AV * const ary = cx->blk_sub.argarray;
1955 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1956
e1a80902 1957 Perl_init_dbargs(aTHX);
a0d0e21e 1958
3280af22
NIS
1959 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1960 av_extend(PL_dbargs, AvFILLp(ary) + off);
1961 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1962 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1963 }
f3aa04c2
GS
1964 /* XXX only hints propagated via op_private are currently
1965 * visible (others are not easily accessible, since they
1966 * use the global PL_hints) */
6e449a3a 1967 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1968 {
1969 SV * mask ;
72dc9ed5 1970 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1971
ac27b0f5 1972 if (old_warnings == pWARN_NONE ||
114bafba 1973 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1974 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1975 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1976 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1977 /* Get the bit mask for $warnings::Bits{all}, because
1978 * it could have been extended by warnings::register */
1979 SV **bits_all;
6673a63c 1980 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1981 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1982 mask = newSVsv(*bits_all);
1983 }
1984 else {
1985 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1986 }
1987 }
e476b1b5 1988 else
72dc9ed5 1989 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1990 mPUSHs(mask);
e476b1b5 1991 }
b3ca2e83 1992
c28fe1ec 1993 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 1994 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 1995 : &PL_sv_undef);
a0d0e21e
LW
1996 RETURN;
1997}
1998
a0d0e21e
LW
1999PP(pp_reset)
2000{
97aff369 2001 dVAR;
39644a26 2002 dSP;
f650fa72
FC
2003 const char * const tmps =
2004 (MAXARG < 1 || (!TOPs && !POPs)) ? (const char *)"" : POPpconstx;
11faa288 2005 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 2006 PUSHs(&PL_sv_yes);
a0d0e21e
LW
2007 RETURN;
2008}
2009
dd2155a4
DM
2010/* like pp_nextstate, but used instead when the debugger is active */
2011
a0d0e21e
LW
2012PP(pp_dbstate)
2013{
27da23d5 2014 dVAR;
533c011a 2015 PL_curcop = (COP*)PL_op;
a0d0e21e 2016 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 2017 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
2018 FREETMPS;
2019
f410a211
NC
2020 PERL_ASYNC_CHECK();
2021
5df8de69
DM
2022 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
2023 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 2024 {
39644a26 2025 dSP;
c09156bb 2026 register PERL_CONTEXT *cx;
f54cb97a 2027 const I32 gimme = G_ARRAY;
eb160463 2028 U8 hasargs;
0bd48802
AL
2029 GV * const gv = PL_DBgv;
2030 register CV * const cv = GvCV(gv);
a0d0e21e 2031
a0d0e21e 2032 if (!cv)
cea2e8a9 2033 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 2034
aea4f609
DM
2035 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
2036 /* don't do recursive DB::DB call */
a0d0e21e 2037 return NORMAL;
748a9306 2038
a57c6685 2039 ENTER;
4633a7c4
LW
2040 SAVETMPS;
2041
3280af22 2042 SAVEI32(PL_debug);
55497cff 2043 SAVESTACK_POS();
3280af22 2044 PL_debug = 0;
748a9306 2045 hasargs = 0;
924508f0 2046 SPAGAIN;
748a9306 2047
aed2304a 2048 if (CvISXSUB(cv)) {
c127bd3a
SF
2049 CvDEPTH(cv)++;
2050 PUSHMARK(SP);
2051 (void)(*CvXSUB(cv))(aTHX_ cv);
2052 CvDEPTH(cv)--;
2053 FREETMPS;
a57c6685 2054 LEAVE;
c127bd3a
SF
2055 return NORMAL;
2056 }
2057 else {
2058 PUSHBLOCK(cx, CXt_SUB, SP);
2059 PUSHSUB_DB(cx);
2060 cx->blk_sub.retop = PL_op->op_next;
2061 CvDEPTH(cv)++;
2062 SAVECOMPPAD();
2063 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
2064 RETURNOP(CvSTART(cv));
2065 }
a0d0e21e
LW
2066 }
2067 else
2068 return NORMAL;
2069}
2070
b9d76716
VP
2071STATIC SV **
2072S_adjust_stack_on_leave(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme, U32 flags)
2073{
9a214eec 2074 bool padtmp = 0;
b9d76716
VP
2075 PERL_ARGS_ASSERT_ADJUST_STACK_ON_LEAVE;
2076
9a214eec
DM
2077 if (flags & SVs_PADTMP) {
2078 flags &= ~SVs_PADTMP;
2079 padtmp = 1;
2080 }
b9d76716
VP
2081 if (gimme == G_SCALAR) {
2082 if (MARK < SP)
9a214eec
DM
2083 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2084 ? *SP : sv_mortalcopy(*SP);
b9d76716
VP
2085 else {
2086 /* MEXTEND() only updates MARK, so reuse it instead of newsp. */
2087 MARK = newsp;
2088 MEXTEND(MARK, 1);
2089 *++MARK = &PL_sv_undef;
2090 return MARK;
2091 }
2092 }
2093 else if (gimme == G_ARRAY) {
2094 /* in case LEAVE wipes old return values */
2095 while (++MARK <= SP) {
9a214eec 2096 if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
b9d76716
VP
2097 *++newsp = *MARK;
2098 else {
2099 *++newsp = sv_mortalcopy(*MARK);
2100 TAINT_NOT; /* Each item is independent */
2101 }
2102 }
2103 /* When this function was called with MARK == newsp, we reach this
2104 * point with SP == newsp. */
2105 }
2106
2107 return newsp;
2108}
2109
2b9a6457
VP
2110PP(pp_enter)
2111{
2112 dVAR; dSP;
2113 register PERL_CONTEXT *cx;
7c2d9d03 2114 I32 gimme = GIMME_V;
2b9a6457
VP
2115
2116 ENTER_with_name("block");
2117
2118 SAVETMPS;
2119 PUSHBLOCK(cx, CXt_BLOCK, SP);
2120
2121 RETURN;
2122}
2123
2124PP(pp_leave)
2125{
2126 dVAR; dSP;
2127 register PERL_CONTEXT *cx;
2128 SV **newsp;
2129 PMOP *newpm;
2130 I32 gimme;
2131
2132 if (PL_op->op_flags & OPf_SPECIAL) {
2133 cx = &cxstack[cxstack_ix];
2134 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2135 }
2136
2137 POPBLOCK(cx,newpm);
2138
2139 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2140
2141 TAINT_NOT;
f02ea43c 2142 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP);
2b9a6457
VP
2143 PL_curpm = newpm; /* Don't pop $1 et al till now */
2144
2145 LEAVE_with_name("block");
2146
2147 RETURN;
2148}
2149
a0d0e21e
LW
2150PP(pp_enteriter)
2151{
27da23d5 2152 dVAR; dSP; dMARK;
c09156bb 2153 register PERL_CONTEXT *cx;
f54cb97a 2154 const I32 gimme = GIMME_V;
df530c37 2155 void *itervar; /* location of the iteration variable */
840fe433 2156 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2157
d343c3ef 2158 ENTER_with_name("loop1");
4633a7c4
LW
2159 SAVETMPS;
2160
aafca525
DM
2161 if (PL_op->op_targ) { /* "my" variable */
2162 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM
2163 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2164 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2165 SVs_PADSTALE, SVs_PADSTALE);
2166 }
09edbca0 2167 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
89e00a7c 2168#ifdef USE_ITHREADS
df530c37 2169 itervar = PL_comppad;
89e00a7c 2170#else
aafca525 2171 itervar = &PAD_SVl(PL_op->op_targ);
7766f137 2172#endif
54b9620d 2173 }
aafca525 2174 else { /* symbol table variable */
159b6efe 2175 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM
2176 SV** svp = &GvSV(gv);
2177 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2178 *svp = newSV(0);
df530c37 2179 itervar = (void *)gv;
54b9620d 2180 }
4633a7c4 2181
0d863452
RH
2182 if (PL_op->op_private & OPpITER_DEF)
2183 cxtype |= CXp_FOR_DEF;
2184
d343c3ef 2185 ENTER_with_name("loop2");
a0d0e21e 2186
7766f137 2187 PUSHBLOCK(cx, cxtype, SP);
df530c37 2188 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2189 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
2190 SV *maybe_ary = POPs;
2191 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2192 dPOPss;
d01136d6 2193 SV * const right = maybe_ary;
984a4bea
RD
2194 SvGETMAGIC(sv);
2195 SvGETMAGIC(right);
4fe3f0fa 2196 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2197 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
2198 cx->cx_type |= CXt_LOOP_LAZYIV;
2199 /* Make sure that no-one re-orders cop.h and breaks our
2200 assumptions */
2201 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040 2202#ifdef NV_PRESERVES_UV
f52e41ad
FC
2203 if ((SvOK(sv) && ((SvNV_nomg(sv) < (NV)IV_MIN) ||
2204 (SvNV_nomg(sv) > (NV)IV_MAX)))
a2309040 2205 ||
f52e41ad
FC
2206 (SvOK(right) && ((SvNV_nomg(right) > (NV)IV_MAX) ||
2207 (SvNV_nomg(right) < (NV)IV_MIN))))
a2309040 2208#else
f52e41ad 2209 if ((SvOK(sv) && ((SvNV_nomg(sv) <= (NV)IV_MIN)
a2309040 2210 ||
f52e41ad
FC
2211 ((SvNV_nomg(sv) > 0) &&
2212 ((SvUV_nomg(sv) > (UV)IV_MAX) ||
2213 (SvNV_nomg(sv) > (NV)UV_MAX)))))
a2309040 2214 ||
f52e41ad 2215 (SvOK(right) && ((SvNV_nomg(right) <= (NV)IV_MIN)
a2309040 2216 ||
f52e41ad
FC
2217 ((SvNV_nomg(right) > 0) &&
2218 ((SvUV_nomg(right) > (UV)IV_MAX) ||
2219 (SvNV_nomg(right) > (NV)UV_MAX))
2220 ))))
a2309040 2221#endif
076d9a11 2222 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
2223 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2224 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM
2225#ifdef DEBUGGING
2226 /* for correct -Dstv display */
2227 cx->blk_oldsp = sp - PL_stack_base;
2228#endif
89ea2908 2229 }
3f63a782 2230 else {
d01136d6
BS
2231 cx->cx_type &= ~CXTYPEMASK;
2232 cx->cx_type |= CXt_LOOP_LAZYSV;
2233 /* Make sure that no-one re-orders cop.h and breaks our
2234 assumptions */
2235 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2236 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2237 cx->blk_loop.state_u.lazysv.end = right;
2238 SvREFCNT_inc(right);
2239 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
2240 /* This will do the upgrade to SVt_PV, and warn if the value
2241 is uninitialised. */
10516c54 2242 (void) SvPV_nolen_const(right);
267cc4a8
NC
2243 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2244 to replace !SvOK() with a pointer to "". */
2245 if (!SvOK(right)) {
2246 SvREFCNT_dec(right);
d01136d6 2247 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2248 }
3f63a782 2249 }
89ea2908 2250 }
d01136d6 2251 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2252 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
2253 SvREFCNT_inc(maybe_ary);
2254 cx->blk_loop.state_u.ary.ix =
2255 (PL_op->op_private & OPpITER_REVERSED) ?
2256 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2257 -1;
ef3e5ea9 2258 }
89ea2908 2259 }
d01136d6
BS
2260 else { /* iterating over items on the stack */
2261 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2262 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2263 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
2264 }
2265 else {
d01136d6 2266 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2267 }
4633a7c4 2268 }
a0d0e21e
LW
2269
2270 RETURN;
2271}
2272
2273PP(pp_enterloop)
2274{
27da23d5 2275 dVAR; dSP;
c09156bb 2276 register PERL_CONTEXT *cx;
f54cb97a 2277 const I32 gimme = GIMME_V;
a0d0e21e 2278
d343c3ef 2279 ENTER_with_name("loop1");
a0d0e21e 2280 SAVETMPS;
d343c3ef 2281 ENTER_with_name("loop2");
a0d0e21e 2282
3b719c58
NC
2283 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2284 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2285
2286 RETURN;
2287}
2288
2289PP(pp_leaveloop)
2290{
27da23d5 2291 dVAR; dSP;
c09156bb 2292 register PERL_CONTEXT *cx;
a0d0e21e
LW
2293 I32 gimme;
2294 SV **newsp;
2295 PMOP *newpm;
2296 SV **mark;
2297
2298 POPBLOCK(cx,newpm);
3b719c58 2299 assert(CxTYPE_is_LOOP(cx));
4fdae800 2300 mark = newsp;
a8bba7fa 2301 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2302
a1f49e72 2303 TAINT_NOT;
b9d76716 2304 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme, 0);
f86702cc
PP
2305 PUTBACK;
2306
a8bba7fa 2307 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2308 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2309
d343c3ef
GG
2310 LEAVE_with_name("loop2");
2311 LEAVE_with_name("loop1");
a0d0e21e 2312
f86702cc 2313 return NORMAL;
a0d0e21e
LW
2314}
2315
3bdf583b
FC
2316STATIC void
2317S_return_lvalues(pTHX_ SV **mark, SV **sp, SV **newsp, I32 gimme,
d25b0d7b 2318 PERL_CONTEXT *cx, PMOP *newpm)
3bdf583b 2319{
80422e24 2320 const bool ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2321 if (gimme == G_SCALAR) {
d25b0d7b
FC
2322 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2323 SV *sv;
001de122 2324 const char *what = NULL;
d25b0d7b
FC
2325 if (MARK < SP) {
2326 assert(MARK+1 == SP);
2327 if ((SvPADTMP(TOPs) ||
2328 (SvFLAGS(TOPs) & (SVf_READONLY | SVf_FAKE))
2329 == SVf_READONLY
2330 ) &&
2331 !SvSMAGICAL(TOPs)) {
001de122 2332 what =
d25b0d7b 2333 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2334 : "a readonly value" : "a temporary";
d25b0d7b 2335 }
001de122 2336 else goto copy_sv;
d25b0d7b
FC
2337 }
2338 else {
2339 /* sub:lvalue{} will take us here. */
001de122 2340 what = "undef";
d25b0d7b 2341 }
001de122
FC
2342 LEAVE;
2343 cxstack_ix--;
2344 POPSUB(cx,sv);
2345 PL_curpm = newpm;
2346 LEAVESUB(sv);
2347 Perl_croak(aTHX_
2348 "Can't return %s from lvalue subroutine", what
2349 );
d25b0d7b 2350 }
93905212 2351 if (MARK < SP) {
a5ad7a5a 2352 copy_sv:
3bdf583b
FC
2353 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
2354 *++newsp = SvREFCNT_inc(*SP);
2355 FREETMPS;
2356 sv_2mortal(*newsp);
2357 }
2358 else
e08be60b 2359 *++newsp =
e08be60b
FC
2360 !SvTEMP(*SP)
2361 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2362 : *SP;
3bdf583b 2363 }
0d235c77
FC
2364 else {
2365 EXTEND(newsp,1);
3bdf583b 2366 *++newsp = &PL_sv_undef;
0d235c77 2367 }
0e9700df 2368 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC
2369 SvGETMAGIC(TOPs);
2370 if (!SvOK(TOPs)) {
0e9700df 2371 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC
2372 }
2373 }
3bdf583b
FC
2374 }
2375 else if (gimme == G_ARRAY) {
0e9700df 2376 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2377 if (ref || !CxLVAL(cx))
e08be60b
FC
2378 while (++MARK <= SP)
2379 *++newsp =
2380 SvTEMP(*MARK)
2381 ? *MARK
80422e24
FC
2382 : ref && SvFLAGS(*MARK) & SVs_PADTMP
2383 ? sv_mortalcopy(*MARK)
2384 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e08be60b 2385 else while (++MARK <= SP) {
d25b0d7b
FC
2386 if (*MARK != &PL_sv_undef
2387 && (SvPADTMP(*MARK)
2388 || (SvFLAGS(*MARK) & (SVf_READONLY|SVf_FAKE))
2389 == SVf_READONLY
2390 )
2391 ) {
2392 SV *sv;
2393 /* Might be flattened array after $#array = */
2394 PUTBACK;
2395 LEAVE;
2396 cxstack_ix--;
2397 POPSUB(cx,sv);
2398 PL_curpm = newpm;
2399 LEAVESUB(sv);
2400 Perl_croak(aTHX_
2401 "Can't return a %s from lvalue subroutine",
2402 SvREADONLY(TOPs) ? "readonly value" : "temporary");
2403 }
2404 else
4bee03f8
FC
2405 *++newsp =
2406 SvTEMP(*MARK)
2407 ? *MARK
2408 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC
2409 }
2410 }
2411 PL_stack_sp = newsp;
2412}
2413
a0d0e21e
LW
2414PP(pp_return)
2415{
27da23d5 2416 dVAR; dSP; dMARK;
c09156bb 2417 register PERL_CONTEXT *cx;
f86702cc 2418 bool popsub2 = FALSE;
b45de488 2419 bool clear_errsv = FALSE;
fa1e92c4 2420 bool lval = FALSE;
a0d0e21e
LW
2421 I32 gimme;
2422 SV **newsp;
2423 PMOP *newpm;
2424 I32 optype = 0;
b6494f15 2425 SV *namesv;
b0d9ce38 2426 SV *sv;
b263a1ad 2427 OP *retop = NULL;
a0d0e21e 2428
0bd48802
AL
2429 const I32 cxix = dopoptosub(cxstack_ix);
2430
9850bf21
RH
2431 if (cxix < 0) {
2432 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2433 * sort block, which is a CXt_NULL
2434 * not a CXt_SUB */
2435 dounwind(0);
d7507f74
RH
2436 PL_stack_base[1] = *PL_stack_sp;
2437 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2438 return 0;
2439 }
9850bf21
RH
2440 else
2441 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2442 }
a0d0e21e
LW
2443 if (cxix < cxstack_ix)
2444 dounwind(cxix);
2445
d7507f74
RH
2446 if (CxMULTICALL(&cxstack[cxix])) {
2447 gimme = cxstack[cxix].blk_gimme;
2448 if (gimme == G_VOID)
2449 PL_stack_sp = PL_stack_base;
2450 else if (gimme == G_SCALAR) {
2451 PL_stack_base[1] = *PL_stack_sp;
2452 PL_stack_sp = PL_stack_base + 1;
2453 }
9850bf21 2454 return 0;
d7507f74 2455 }
9850bf21 2456
a0d0e21e 2457 POPBLOCK(cx,newpm);
6b35e009 2458 switch (CxTYPE(cx)) {
a0d0e21e 2459 case CXt_SUB:
f86702cc 2460 popsub2 = TRUE;
fa1e92c4 2461 lval = !!CvLVALUE(cx->blk_sub.cv);
f39bc417 2462 retop = cx->blk_sub.retop;
5dd42e15 2463 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2464 break;
2465 case CXt_EVAL:
b45de488
GS
2466 if (!(PL_in_eval & EVAL_KEEPERR))
2467 clear_errsv = TRUE;
a0d0e21e 2468 POPEVAL(cx);
b6494f15 2469 namesv = cx->blk_eval.old_namesv;
f39bc417 2470 retop = cx->blk_eval.retop;
1d76a5c3
GS
2471 if (CxTRYBLOCK(cx))
2472 break;
748a9306
LW
2473 if (optype == OP_REQUIRE &&
2474 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2475 {
54310121 2476 /* Unassume the success we assumed earlier. */
b6494f15 2477 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 2478 SvPVX_const(namesv),
c60dbbc3 2479 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15
VP
2480 G_DISCARD);
2481 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
748a9306 2482 }
a0d0e21e 2483 break;
7766f137
GS
2484 case CXt_FORMAT:
2485 POPFORMAT(cx);
f39bc417 2486 retop = cx->blk_sub.retop;
7766f137 2487 break;
a0d0e21e 2488 default:
cea2e8a9 2489 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2490 }
2491
a1f49e72 2492 TAINT_NOT;
d25b0d7b 2493 if (lval) S_return_lvalues(aTHX_ MARK, SP, newsp, gimme, cx, newpm);
3bdf583b
FC
2494 else {
2495 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2496 if (MARK < SP) {
2497 if (popsub2) {
a8bba7fa 2498 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
3ed94dc0 2499 if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1) {
a29cdaf0
IZ
2500 *++newsp = SvREFCNT_inc(*SP);
2501 FREETMPS;
2502 sv_2mortal(*newsp);
959e3673
GS
2503 }
2504 else {
2505 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2506 FREETMPS;
959e3673
GS
2507 *++newsp = sv_mortalcopy(sv);
2508 SvREFCNT_dec(sv);
a29cdaf0 2509 }
959e3673 2510 }
3ed94dc0 2511 else if (SvTEMP(*SP) && SvREFCNT(*SP) == 1) {
767eda44 2512 *++newsp = *SP;
767eda44 2513 }
959e3673 2514 else
767eda44 2515 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2516 }
2517 else
a29cdaf0 2518 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2519 }
2520 else
3280af22 2521 *++newsp = &PL_sv_undef;
3bdf583b
FC
2522 }
2523 else if (gimme == G_ARRAY) {
a1f49e72 2524 while (++MARK <= SP) {
3ed94dc0 2525 *++newsp = popsub2 && SvTEMP(*MARK) && SvREFCNT(*MARK) == 1
f86702cc 2526 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2527 TAINT_NOT; /* Each item is independent */
2528 }
3bdf583b
FC
2529 }
2530 PL_stack_sp = newsp;
a0d0e21e 2531 }
a0d0e21e 2532
5dd42e15 2533 LEAVE;
f86702cc
PP
2534 /* Stack values are safe: */
2535 if (popsub2) {
5dd42e15 2536 cxstack_ix--;
b0d9ce38 2537 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2538 }
b0d9ce38 2539 else
c445ea15 2540 sv = NULL;
3280af22 2541 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2542
b0d9ce38 2543 LEAVESUB(sv);
8433848b 2544 if (clear_errsv) {
ab69dbc2 2545 CLEAR_ERRSV();
8433848b 2546 }
f39bc417 2547 return retop;
a0d0e21e
LW
2548}
2549
4f443c3d
FC
2550/* This duplicates parts of pp_leavesub, so that it can share code with
2551 * pp_return */
2552PP(pp_leavesublv)
2553{
2554 dVAR; dSP;
4f443c3d
FC
2555 SV **newsp;
2556 PMOP *newpm;
2557 I32 gimme;
2558 register PERL_CONTEXT *cx;
2559 SV *sv;
2560
2561 if (CxMULTICALL(&cxstack[cxstack_ix]))
2562 return 0;
2563
2564 POPBLOCK(cx,newpm);
2565 cxstack_ix++; /* temporarily protect top context */
4f443c3d
FC
2566
2567 TAINT_NOT;
2568
0d235c77 2569 S_return_lvalues(aTHX_ newsp, SP, newsp, gimme, cx, newpm);
4f443c3d
FC
2570
2571 LEAVE;
2572 cxstack_ix--;
2573 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
2574 PL_curpm = newpm; /* ... and pop $1 et al */
2575
2576 LEAVESUB(sv);
2577 return cx->blk_sub.retop;
2578}
2579
a0d0e21e
LW
2580PP(pp_last)
2581{
27da23d5 2582 dVAR; dSP;
a0d0e21e 2583 I32 cxix;
c09156bb 2584 register PERL_CONTEXT *cx;
f86702cc 2585 I32 pop2 = 0;
a0d0e21e 2586 I32 gimme;
8772537c 2587 I32 optype;
b263a1ad 2588 OP *nextop = NULL;
a0d0e21e
LW
2589 SV **newsp;
2590 PMOP *newpm;
a8bba7fa 2591 SV **mark;
c445ea15 2592 SV *sv = NULL;
9d4ba2ae 2593
a0d0e21e 2594
533c011a 2595 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2596 cxix = dopoptoloop(cxstack_ix);
2597 if (cxix < 0)
a651a37d 2598 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2599 }
2600 else {
2601 cxix = dopoptolabel(cPVOP->op_pv);
2602 if (cxix < 0)
cea2e8a9 2603 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2604 }
2605 if (cxix < cxstack_ix)
2606 dounwind(cxix);
2607
2608 POPBLOCK(cx,newpm);
5dd42e15 2609 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2610 mark = newsp;
6b35e009 2611 switch (CxTYPE(cx)) {
c6fdafd0 2612 case CXt_LOOP_LAZYIV:
d01136d6 2613 case CXt_LOOP_LAZYSV:
3b719c58
NC
2614 case CXt_LOOP_FOR:
2615 case CXt_LOOP_PLAIN:
2616 pop2 = CxTYPE(cx);
a8bba7fa 2617 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2618 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2619 break;
f86702cc 2620 case CXt_SUB:
f86702cc 2621 pop2 = CXt_SUB;
f39bc417 2622 nextop = cx->blk_sub.retop;
a0d0e21e 2623 break;
f86702cc
PP
2624 case CXt_EVAL:
2625 POPEVAL(cx);
f39bc417 2626 nextop = cx->blk_eval.retop;
a0d0e21e 2627 break;
7766f137
GS
2628 case CXt_FORMAT:
2629 POPFORMAT(cx);
f39bc417 2630 nextop = cx->blk_sub.retop;
7766f137 2631 break;
a0d0e21e 2632 default:
cea2e8a9 2633 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2634 }
2635
a1f49e72 2636 TAINT_NOT;
b9d76716
VP
2637 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme,
2638 pop2 == CXt_SUB ? SVs_TEMP : 0);
f86702cc
PP
2639 PUTBACK;
2640
5dd42e15
DM
2641 LEAVE;
2642 cxstack_ix--;
f86702cc
PP
2643 /* Stack values are safe: */
2644 switch (pop2) {
c6fdafd0 2645 case CXt_LOOP_LAZYIV:
3b719c58 2646 case CXt_LOOP_PLAIN:
d01136d6 2647 case CXt_LOOP_LAZYSV:
3b719c58 2648 case CXt_LOOP_FOR:
a8bba7fa 2649 POPLOOP(cx); /* release loop vars ... */
4fdae800 2650 LEAVE;
f86702cc
PP
2651 break;
2652 case CXt_SUB:
b0d9ce38 2653 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2654 break;
a0d0e21e 2655 }
3280af22 2656 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2657
b0d9ce38 2658 LEAVESUB(sv);
9d4ba2ae
AL
2659 PERL_UNUSED_VAR(optype);
2660 PERL_UNUSED_VAR(gimme);
f86702cc 2661 return nextop;
a0d0e21e
LW
2662}
2663
2664PP(pp_next)
2665{
27da23d5 2666 dVAR;
a0d0e21e 2667 I32 cxix;
c09156bb 2668 register PERL_CONTEXT *cx;
85538317 2669 I32 inner;
a0d0e21e 2670
533c011a 2671 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2672 cxix = dopoptoloop(cxstack_ix);
2673 if (cxix < 0)
a651a37d 2674 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2675 }
2676 else {
2677 cxix = dopoptolabel(cPVOP->op_pv);
2678 if (cxix < 0)
cea2e8a9 2679 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2680 }
2681 if (cxix < cxstack_ix)
2682 dounwind(cxix);
2683
85538317
GS
2684 /* clear off anything above the scope we're re-entering, but
2685 * save the rest until after a possible continue block */
2686 inner = PL_scopestack_ix;
1ba6ee2b 2687 TOPBLOCK(cx);
85538317
GS
2688 if (PL_scopestack_ix < inner)
2689 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2690 PL_curcop = cx->blk_oldcop;
d57ce4df 2691 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW
2692}
2693
2694PP(pp_redo)
2695{
27da23d5 2696 dVAR;
a0d0e21e 2697 I32 cxix;
c09156bb 2698 register PERL_CONTEXT *cx;
a0d0e21e 2699 I32 oldsave;
a034e688 2700 OP* redo_op;
a0d0e21e 2701
533c011a 2702 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2703 cxix = dopoptoloop(cxstack_ix);
2704 if (cxix < 0)
a651a37d 2705 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2706 }
2707 else {
2708 cxix = dopoptolabel(cPVOP->op_pv);
2709 if (cxix < 0)
cea2e8a9 2710 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2711 }
2712 if (cxix < cxstack_ix)
2713 dounwind(cxix);
2714
022eaa24 2715 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2716 if (redo_op->op_type == OP_ENTER) {
2717 /* pop one less context to avoid $x being freed in while (my $x..) */
2718 cxstack_ix++;
2719 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2720 redo_op = redo_op->op_next;
2721 }
2722
a0d0e21e 2723 TOPBLOCK(cx);
3280af22 2724 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2725 LEAVE_SCOPE(oldsave);
936c78b5 2726 FREETMPS;
3a1b2b9e 2727 PL_curcop = cx->blk_oldcop;
a034e688 2728 return redo_op;
a0d0e21e
LW
2729}
2730
0824fdcb 2731STATIC OP *
bfed75c6 2732S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2733{
97aff369 2734 dVAR;
a0d0e21e 2735 OP **ops = opstack;
bfed75c6 2736 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2737
7918f24d
NC
2738 PERL_ARGS_ASSERT_DOFINDLABEL;
2739
fc36a67e 2740 if (ops >= oplimit)
cea2e8a9 2741 Perl_croak(aTHX_ too_deep);
11343788
MB
2742 if (o->op_type == OP_LEAVE ||
2743 o->op_type == OP_SCOPE ||
2744 o->op_type == OP_LEAVELOOP ||
33d34e4c 2745 o->op_type == OP_LEAVESUB ||
11343788 2746 o->op_type == OP_LEAVETRY)
fc36a67e 2747 {
5dc0d613 2748 *ops++ = cUNOPo->op_first;
fc36a67e 2749 if (ops >= oplimit)
cea2e8a9 2750 Perl_croak(aTHX_ too_deep);
fc36a67e 2751 }
c4aa4e48 2752 *ops = 0;
11343788 2753 if (o->op_flags & OPf_KIDS) {
aec46f14 2754 OP *kid;
a0d0e21e 2755 /* First try all the kids at this level, since that's likeliest. */
11343788 2756 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac
AD
2757 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2758 const char *kid_label = CopLABEL(kCOP);
2759 if (kid_label && strEQ(kid_label, label))
2760 return kid;
2761 }
a0d0e21e 2762 }
11343788 2763 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2764 if (kid == PL_lastgotoprobe)
a0d0e21e 2765 continue;
ed8d0fe2
SM
2766 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2767 if (ops == opstack)
2768 *ops++ = kid;
2769 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2770 ops[-1]->op_type == OP_DBSTATE)
2771 ops[-1] = kid;
2772 else
2773 *ops++ = kid;
2774 }
155aba94 2775 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2776 return o;
a0d0e21e
LW
2777 }
2778 }
c4aa4e48 2779 *ops = 0;
a0d0e21e
LW
2780 return 0;
2781}
2782
a0d0e21e
LW
2783PP(pp_goto)
2784{
27da23d5 2785 dVAR; dSP;
cbbf8932 2786 OP *retop = NULL;
a0d0e21e 2787 I32 ix;
c09156bb 2788 register PERL_CONTEXT *cx;
fc36a67e
PP
2789#define GOTO_DEPTH 64
2790 OP *enterops[GOTO_DEPTH];
cbbf8932 2791 const char *label = NULL;
bfed75c6
AL
2792 const bool do_dump = (PL_op->op_type == OP_DUMP);
2793 static const char must_have_label[] = "goto must have label";
a0d0e21e 2794
533c011a 2795 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2796 SV * const sv = POPs;
a0d0e21e
LW
2797
2798 /* This egregious kludge implements goto &subroutine */
2799 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2800 I32 cxix;
c09156bb 2801 register PERL_CONTEXT *cx;
ea726b52 2802 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW
2803 SV** mark;
2804 I32 items = 0;
2805 I32 oldsave;
b1464ded 2806 bool reified = 0;
a0d0e21e 2807
e8f7dd13 2808 retry:
4aa0a1f7 2809 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2810 const GV * const gv = CvGV(cv);
e8f7dd13 2811 if (gv) {
7fc63493 2812 GV *autogv;
e8f7dd13
GS
2813 SV *tmpstr;
2814 /* autoloaded stub? */
2815 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2816 goto retry;
c271df94
BF
2817 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2818 GvNAMELEN(gv),
2819 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS
2820 if (autogv && (cv = GvCV(autogv)))
2821 goto retry;
2822 tmpstr = sv_newmortal();
c445ea15 2823 gv_efullname3(tmpstr, gv, NULL);
be2597df 2824 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2825 }
cea2e8a9 2826 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2827 }
2828
a0d0e21e 2829 /* First do some returnish stuff. */
b37c2d43 2830 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2831 FREETMPS;
a0d0e21e
LW
2832 cxix = dopoptosub(cxstack_ix);
2833 if (cxix < 0)
cea2e8a9 2834 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2835 if (cxix < cxstack_ix)
2836 dounwind(cxix);
2837 TOPBLOCK(cx);
2d43a17f 2838 SPAGAIN;
564abe23 2839 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2840 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2841 if (CxREALEVAL(cx))
2842 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2843 else
2844 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2845 }
9850bf21
RH
2846 else if (CxMULTICALL(cx))
2847 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2848 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2849 /* put @_ back onto stack */
a0d0e21e 2850 AV* av = cx->blk_sub.argarray;
bfed75c6 2851
93965878 2852 items = AvFILLp(av) + 1;
a45cdc79
DM
2853 EXTEND(SP, items+1); /* @_ could have been extended. */
2854 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2855 SvREFCNT_dec(GvAV(PL_defgv));
2856 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2857 CLEAR_ARGARRAY(av);
d8b46c1b 2858 /* abandon @_ if it got reified */
62b1ebc2 2859 if (AvREAL(av)) {
b1464ded
DM
2860 reified = 1;
2861 SvREFCNT_dec(av);
d8b46c1b
GS
2862 av = newAV();
2863 av_extend(av, items-1);
11ca45c0 2864 AvREIFY_only(av);
ad64d0ec 2865 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2866 }
a0d0e21e 2867 }
aed2304a 2868 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2869 AV* const av = GvAV(PL_defgv);
1fa4e549 2870 items = AvFILLp(av) + 1;
a45cdc79
DM
2871 EXTEND(SP, items+1); /* @_ could have been extended. */
2872 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2873 }
a45cdc79
DM
2874 mark = SP;
2875 SP += items;
6b35e009 2876 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2877 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2878 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2879 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2880 LEAVE_SCOPE(oldsave);
2881
2882 /* Now do some callish stuff. */
2883 SAVETMPS;
5023d17a 2884 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2885 if (CvISXSUB(cv)) {
b37c2d43 2886 OP* const retop = cx->blk_sub.retop;
9d63fa07
KW
2887 SV **newsp PERL_UNUSED_DECL;
2888 I32 gimme PERL_UNUSED_DECL;
b1464ded
DM
2889 if (reified) {
2890 I32 index;
2891 for (index=0; index<items; index++)
2892 sv_2mortal(SP[-index]);
2893 }
1fa4e549 2894
b37c2d43
AL
2895 /* XS subs don't have a CxSUB, so pop it */
2896 POPBLOCK(cx, PL_curpm);
2897 /* Push a mark for the start of arglist */
2898 PUSHMARK(mark);
2899 PUTBACK;
2900 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2901 LEAVE;
5eff7df7 2902 return retop;
a0d0e21e
LW
2903 }
2904 else {
b37c2d43 2905 AV* const padlist = CvPADLIST(cv);
6b35e009 2906 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2907 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2908 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2909 cx->cx_type = CXt_SUB;
b150fb22 2910 }
a0d0e21e 2911 cx->blk_sub.cv = cv;
1a5b3db4 2912 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2913
a0d0e21e
LW
2914 CvDEPTH(cv)++;
2915 if (CvDEPTH(cv) < 2)
74c765eb 2916 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2917 else {
2b9dff67 2918 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2919 sub_crush_depth(cv);
26019298 2920 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2921 }
426a09cd 2922 PL_curcop = cx->blk_oldcop;
fd617465
DM
2923 SAVECOMPPAD();
2924 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2925 if (CxHASARGS(cx))
6d4ff0d2 2926 {
502c6561 2927 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2928
3280af22 2929 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2930 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2931 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2932 cx->blk_sub.argarray = av;
a0d0e21e
LW
2933
2934 if (items >= AvMAX(av) + 1) {
b37c2d43 2935 SV **ary = AvALLOC(av);
a0d0e21e
LW
2936 if (AvARRAY(av) != ary) {
2937 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2938 AvARRAY(av) = ary;
a0d0e21e
LW
2939 }
2940 if (items >= AvMAX(av) + 1) {
2941 AvMAX(av) = items - 1;
2942 Renew(ary,items+1,SV*);
2943 AvALLOC(av) = ary;
9c6bc640 2944 AvARRAY(av) = ary;
a0d0e21e
LW
2945 }
2946 }
a45cdc79 2947 ++mark;
a0d0e21e 2948 Copy(mark,AvARRAY(av),items,SV*);
93965878 2949 AvFILLp(av) = items - 1;
d8b46c1b 2950 assert(!AvREAL(av));
b1464ded
DM
2951 if (reified) {
2952 /* transfer 'ownership' of refcnts to new @_ */
2953 AvREAL_on(av);
2954 AvREIFY_off(av);
2955 }
a0d0e21e
LW
2956 while (items--) {
2957 if (*mark)
2958 SvTEMP_off(*mark);
2959 mark++;
2960 }
2961 }
491527d0 2962 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2963 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2964 if (PERLDB_GOTO) {
b96d8cd9 2965 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2966 if (gotocv) {
2967 PUSHMARK( PL_stack_sp );
ad64d0ec 2968 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2969 PL_stack_sp--;
2970 }
491527d0 2971 }
1ce6579f 2972 }
a0d0e21e
LW
2973 RETURNOP(CvSTART(cv));
2974 }
2975 }
1614b0e3 2976 else {
0510663f 2977 label = SvPV_nolen_const(sv);
1614b0e3 2978 if (!(do_dump || *label))
cea2e8a9 2979 DIE(aTHX_ must_have_label);
1614b0e3 2980 }
a0d0e21e 2981 }
533c011a 2982 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2983 if (! do_dump)
cea2e8a9 2984 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2985 }
2986 else
2987 label = cPVOP->op_pv;
2988
f410a211
NC
2989 PERL_ASYNC_CHECK();
2990
a0d0e21e 2991 if (label && *label) {
cbbf8932 2992 OP *gotoprobe = NULL;
3b2447bc 2993 bool leaving_eval = FALSE;
33d34e4c 2994 bool in_block = FALSE;
cbbf8932 2995 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2996
2997 /* find label */
2998
d4c19fe8 2999 PL_lastgotoprobe = NULL;
a0d0e21e
LW
3000 *enterops = 0;
3001 for (ix = cxstack_ix; ix >= 0; ix--) {
3002 cx = &cxstack[ix];
6b35e009 3003 switch (CxTYPE(cx)) {
a0d0e21e 3004 case CXt_EVAL:
3b2447bc 3005 leaving_eval = TRUE;
971ecbe6 3006 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
3007 gotoprobe = (last_eval_cx ?
3008 last_eval_cx->blk_eval.old_eval_root :
3009 PL_eval_root);
3010 last_eval_cx = cx;
9c5794fe
RH
3011 break;
3012 }
3013 /* else fall through */
c6fdafd0 3014 case CXt_LOOP_LAZYIV:
d01136d6 3015 case CXt_LOOP_LAZYSV:
3b719c58
NC
3016 case CXt_LOOP_FOR:
3017 case CXt_LOOP_PLAIN:
bb5aedc1
VP
3018 case CXt_GIVEN:
3019 case CXt_WHEN:
a0d0e21e
LW
3020 gotoprobe = cx->blk_oldcop->op_sibling;
3021 break;
3022 case CXt_SUBST:
3023 continue;
3024 case CXt_BLOCK:
33d34e4c 3025 if (ix) {
a0d0e21e 3026 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
3027 in_block = TRUE;
3028 } else
3280af22 3029 gotoprobe = PL_main_root;
a0d0e21e 3030 break;
b3933176 3031 case CXt_SUB:
9850bf21 3032 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
3033 gotoprobe = CvROOT(cx->blk_sub.cv);
3034 break;
3035 }
3036 /* FALL THROUGH */
7766f137 3037 case CXt_FORMAT:
0a753a76 3038 case CXt_NULL:
a651a37d 3039 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
3040 default:
3041 if (ix)
cea2e8a9 3042 DIE(aTHX_ "panic: goto");
3280af22 3043 gotoprobe = PL_main_root;
a0d0e21e
LW
3044 break;
3045 }
2b597662
GS
3046 if (gotoprobe) {
3047 retop = dofindlabel(gotoprobe, label,
3048 enterops, enterops + GOTO_DEPTH);
3049 if (retop)
3050 break;
eae48c89
Z
3051 if (gotoprobe->op_sibling &&
3052 gotoprobe->op_sibling->op_type == OP_UNSTACK &&
3053 gotoprobe->op_sibling->op_sibling) {
3054 retop = dofindlabel(gotoprobe->op_sibling->op_sibling,
3055 label, enterops, enterops + GOTO_DEPTH);
3056 if (retop)
3057 break;
3058 }
2b597662 3059 }
3280af22 3060 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
3061 }
3062 if (!retop)
cea2e8a9 3063 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 3064
3b2447bc
RH
3065 /* if we're leaving an eval, check before we pop any frames
3066 that we're not going to punt, otherwise the error
3067 won't be caught */
3068
3069 if (leaving_eval && *enterops && enterops[1]) {
3070 I32 i;
3071 for (i = 1; enterops[i]; i++)
3072 if (enterops[i]->op_type == OP_ENTERITER)
3073 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
3074 }
3075
b500e03b
GG
3076 if (*enterops && enterops[1]) {
3077 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3078 if (enterops[i])
3079 deprecate("\"goto\" to jump into a construct");
3080 }
3081
a0d0e21e
LW
3082 /* pop unwanted frames */
3083
3084 if (ix < cxstack_ix) {
3085 I32 oldsave;
3086
3087 if (ix < 0)
3088 ix = 0;
3089 dounwind(ix);
3090 TOPBLOCK(cx);
3280af22 3091 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
3092 LEAVE_SCOPE(oldsave);
3093 }
3094
3095 /* push wanted frames */
3096
748a9306 3097 if (*enterops && enterops[1]) {
0bd48802 3098 OP * const oldop = PL_op;
33d34e4c
AE
3099 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3100 for (; enterops[ix]; ix++) {
533c011a 3101 PL_op = enterops[ix];
84902520
TB
3102 /* Eventually we may want to stack the needed arguments
3103 * for each op. For now, we punt on the hard ones. */
533c011a 3104 if (PL_op->op_type == OP_ENTERITER)
894356b3 3105 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3106 PL_op->op_ppaddr(aTHX);
a0d0e21e 3107 }
533c011a 3108 PL_op = oldop;
a0d0e21e
LW
3109 }
3110 }
3111
3112 if (do_dump) {
a5f75d66 3113#ifdef VMS
6b88bc9c 3114 if (!retop) retop = PL_main_start;
a5f75d66 3115#endif
3280af22
NIS
3116 PL_restartop = retop;
3117 PL_do_undump = TRUE;
a0d0e21e
LW
3118
3119 my_unexec();
3120
3280af22
NIS
3121 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3122 PL_do_undump = FALSE;
a0d0e21e
LW
3123 }
3124
3125 RETURNOP(retop);
3126}
3127
3128PP(pp_exit)
3129{
97aff369 3130 dVAR;
39644a26 3131 dSP;
a0d0e21e
LW
3132 I32 anum;
3133
3134 if (MAXARG < 1)
3135 anum = 0;
9d3c658e
FC
3136 else if (!TOPs) {
3137 anum = 0; (void)POPs;
3138 }
ff0cee69 3139 else {
a0d0e21e 3140 anum = SvIVx(POPs);
d98f61e7
GS
3141#ifdef VMS
3142 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 3143 anum = 0;
96e176bf 3144 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
3145#endif
3146 }
cc3604b1 3147 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
3148#ifdef PERL_MAD
3149 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
3150 if (anum || !(PL_minus_c && PL_madskills))
3151 my_exit(anum);
3152#else
a0d0e21e 3153 my_exit(anum);
81d86705 3154#endif
3280af22 3155 PUSHs(&PL_sv_undef);
a0d0e21e
LW
3156 RETURN;
3157}
3158
a0d0e21e
LW
3159/* Eval. */
3160
0824fdcb 3161STATIC void
cea2e8a9 3162S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3163{
504618e9 3164 const char *s = SvPVX_const(sv);
890ce7af 3165 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3166 I32 line = 1;
a0d0e21e 3167
7918f24d
NC
3168 PERL_ARGS_ASSERT_SAVE_LINES;
3169
a0d0e21e 3170 while (s && s < send) {
f54cb97a 3171 const char *t;
b9f83d2f 3172 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3173
1d963ff3 3174 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
3175 if (t)
3176 t++;
3177 else
3178 t = send;
3179
3180 sv_setpvn(tmpstr, s, t - s);
3181 av_store(array, line++, tmpstr);
3182 s = t;
3183 }
3184}
3185
22f16304
RU
3186/*
3187=for apidoc docatch
3188
3189Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3190
31910 is used as continue inside eval,
3192
31933 is used for a die caught by an inner eval - continue inner loop
3194
3195See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
3196establish a local jmpenv to handle exception traps.
3197
3198=cut
3199*/
0824fdcb 3200STATIC OP *
cea2e8a9 3201S_docatch(pTHX_ OP *o)
1e422769 3202{
97aff369 3203 dVAR;
6224f72b 3204 int ret;
06b5626a 3205 OP * const oldop = PL_op;
db36c5a1 3206 dJMPENV;
1e422769 3207
1e422769 3208#ifdef DEBUGGING
54310121 3209 assert(CATCH_GET == TRUE);
1e422769 3210#endif
312caa8e 3211 PL_op = o;
8bffa5f8 3212
14dd3ad8 3213 JMPENV_PUSH(ret);
6224f72b 3214 switch (ret) {
312caa8e 3215 case 0:
abd70938
DM
3216 assert(cxstack_ix >= 0);
3217 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3218 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3219 redo_body:
85aaa934 3220 CALLRUNOPS(aTHX);
312caa8e
CS
3221 break;
3222 case 3:
8bffa5f8 3223 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z
3224 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3225 PL_restartjmpenv = NULL;
312caa8e
CS
3226 PL_op = PL_restartop;
3227 PL_restartop = 0;
3228 goto redo_body;
3229 }
3230 /* FALL THROUGH */
3231 default:
14dd3ad8 3232 JMPENV_POP;
533c011a 3233 PL_op = oldop;
6224f72b 3234 JMPENV_JUMP(ret);
1e422769 3235 /* NOTREACHED */
1e422769 3236 }
14dd3ad8 3237 JMPENV_POP;
533c011a 3238 PL_op = oldop;
5f66b61c 3239 return NULL;
1e422769
PP
3240}
3241
ee23ad3b
NC
3242/* James Bond: Do you expect me to talk?
3243 Auric Goldfinger: No, Mr. Bond. I expect you to die.
3244
3245 This code is an ugly hack, doesn't work with lexicals in subroutines that are
3246 called more than once, and is only used by regcomp.c, for (?{}) blocks.
3247
3248 Currently it is not used outside the core code. Best if it stays that way.
d59a8b3e
NC
3249
3250 Hence it's now deprecated, and will be removed.
ee23ad3b 3251*/
c277df42 3252OP *
bfed75c6 3253Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
3254/* sv Text to convert to OP tree. */
3255/* startop op_free() this to undo. */
3256/* code Short string id of the caller. */
3257{
d59a8b3e
NC
3258 PERL_ARGS_ASSERT_SV_COMPILE_2OP;
3259 return Perl_sv_compile_2op_is_broken(aTHX_ sv, startop, code, padp);
3260}
3261
3262/* Don't use this. It will go away without warning once the regexp engine is
3263 refactored not to use it. */
3264OP *
3265Perl_sv_compile_2op_is_broken(pTHX_ SV *sv, OP **startop, const char *code,
3266 PAD **padp)
3267{
27da23d5 3268 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
3269 PERL_CONTEXT *cx;
3270 SV **newsp;
b094c71d 3271 I32 gimme = G_VOID;
c277df42
IZ
3272 I32 optype;
3273 OP dummy;
83ee9e09
GS
3274 char tbuf[TYPE_DIGITS(long) + 12 + 10];
3275 char *tmpbuf = tbuf;
c277df42 3276 char *safestr;
a3985cdc 3277 int runtime;
601f1833 3278 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 3279 STRLEN len;
634d6919 3280 bool need_catch;
c277df42 3281
d59a8b3e 3282 PERL_ARGS_ASSERT_SV_COMPILE_2OP_IS_BROKEN;
7918f24d 3283
d343c3ef 3284 ENTER_with_name("eval");
27fcb6ee 3285 lex_start(sv, NULL, LEX_START_SAME_FILTER);
c277df42
IZ
3286 SAVETMPS;
3287 /* switch to eval mode */
3288
923e4eb5 3289 if (IN_PERL_COMPILETIME) {
f4dd75d9 3290 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 3291 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 3292 }
83ee9e09 3293 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 3294 SV * const sv = sv_newmortal();
83ee9e09
GS
3295 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
3296 code, (unsigned long)++PL_evalseq,
3297 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
3298 tmpbuf = SvPVX(sv);
fc009855 3299 len = SvCUR(sv);
83ee9e09
GS
3300 }
3301 else
d9fad198
JH
3302 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
3303 (unsigned long)++PL_evalseq);
f4dd75d9 3304 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3305 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 3306 SAVECOPLINE(&PL_compiling);
57843af0 3307 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
3308 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
3309 deleting the eval's FILEGV from the stash before gv_check() runs
3310 (i.e. before run-time proper). To work around the coredump that
3311 ensues, we always turn GvMULTI_on for any globals that were
3312 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
3313 safestr = savepvn(tmpbuf, len);
3314 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 3315 SAVEHINTS();
d1ca3daa 3316#ifdef OP_IN_REGISTER
6b88bc9c 3317 PL_opsave = op;
d1ca3daa 3318#else
7766f137 3319 SAVEVPTR(PL_op);
d1ca3daa 3320#endif
c277df42 3321
a3985cdc 3322 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 3323 runtime = IN_PERL_RUNTIME;
a3985cdc 3324 if (runtime)
558b4424 3325 {
d819b83a 3326 runcv = find_runcv(NULL);
a3985cdc 3327
558b4424
FC
3328 /* At run time, we have to fetch the hints from PL_curcop. */
3329 PL_hints = PL_curcop->cop_hints;
3330 if (PL_hints & HINT_LOCALIZE_HH) {
3331 /* SAVEHINTS created a new HV in PL_hintgv, which we
3332 need to GC */
3333 SvREFCNT_dec(GvHV(PL_hintgv));
3334 GvHV(PL_hintgv) =
3335 refcounted_he_chain_2hv(PL_curcop->cop_hints_hash, 0);
3336 hv_magic(GvHV(PL_hintgv), NULL, PERL_MAGIC_hints);
3337 }
3338 SAVECOMPILEWARNINGS();
3339 PL_compiling.cop_warnings = DUP_WARNINGS(PL_curcop->cop_warnings);
3340 cophh_free(CopHINTHASH_get(&PL_compiling));
3341 /* XXX Does this need to avoid copying a label? */
3342 PL_compiling.cop_hints_hash
3343 = cophh_copy(PL_curcop->cop_hints_hash);
3344 }
3345
533c011a 3346 PL_op = &dummy;
13b51b79 3347 PL_op->op_type = OP_ENTEREVAL;
533c011a 3348 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 3349 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 3350 PUSHEVAL(cx, 0);
634d6919
GG
3351 need_catch = CATCH_GET;
3352 CATCH_SET(TRUE);
a3985cdc
DM
3353
3354 if (runtime)
f45b078d 3355 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq, NULL);
a3985cdc 3356 else
f45b078d 3357 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax, NULL);
634d6919 3358 CATCH_SET(need_catch);
13b51b79 3359 POPBLOCK(cx,PL_curpm);
e84b9f1f 3360 POPEVAL(cx);
c277df42
IZ
3361
3362 (*startop)->op_type = OP_NULL;
22c35a8c 3363 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
f3548bdc 3364 /* XXX DAPM do this properly one year */
502c6561 3365 *padp = MUTABLE_AV(SvREFCNT_inc_simple(PL_comppad));
d343c3ef 3366 LEAVE_with_name("eval");
923e4eb5 3367 if (IN_PERL_COMPILETIME)
623e6609 3368 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 3369#ifdef OP_IN_REGISTER
6b88bc9c 3370 op = PL_opsave;
d1ca3daa 3371#endif
9d4ba2ae
AL
3372 PERL_UNUSED_VAR(newsp);
3373 PERL_UNUSED_VAR(optype);
3374
410be5db 3375 return PL_eval_start;
c277df42
IZ
3376}
3377
a3985cdc
DM
3378
3379/*
3380=for apidoc find_runcv
3381
3382Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
3383If db_seqp is non_null, skip CVs that are in the DB package and populate
3384*db_seqp with the cop sequence number at the point that the DB:: code was
3385entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 3386than in the scope of the debugger itself).
a3985cdc
DM
3387
3388=cut
3389*/
3390
3391CV*
d819b83a 3392Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3393{
97aff369 3394 dVAR;
a3985cdc 3395 PERL_SI *si;
a3985cdc 3396
d819b83a
DM
3397 if (db_seqp)
3398 *db_seqp = PL_curcop->cop_seq;
a3985cdc 3399 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3400 I32 ix;
a3985cdc 3401 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3402 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 3403 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 3404 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
3405 /* skip DB:: code */
3406 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3407 *db_seqp = cx->blk_oldcop->cop_seq;
3408 continue;
3409 }
3410 return cv;
3411 }
a3985cdc
DM
3412 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
3413 return PL_compcv;
3414 }
3415 }
3416 return PL_main_cv;
3417}
3418
3419
27e90453
DM
3420/* Run yyparse() in a setjmp wrapper. Returns:
3421 * 0: yyparse() successful
3422 * 1: yyparse() failed
3423 * 3: yyparse() died
3424 */
3425STATIC int
28ac2b49 3426S_try_yyparse(pTHX_ int gramtype)
27e90453
DM
3427{
3428 int ret;
3429 dJMPENV;
3430
3431 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3432 JMPENV_PUSH(ret);
3433 switch (ret) {
3434 case 0:
28ac2b49 3435 ret = yyparse(gramtype) ? 1 : 0;
27e90453
DM
3436 break;
3437 case 3:
3438 break;
3439 default:
3440 JMPENV_POP;
3441 JMPENV_JUMP(ret);
3442 /* NOTREACHED */
3443 }
3444 JMPENV_POP;
3445 return ret;
3446}