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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 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
b9ad30b4
NC		 208 if (DO_UTF8(tmpstr)) {
209 assert (SvUTF8(tmpstr));
210 } else if (SvUTF8(tmpstr)) {
211 /* Not doing UTF-8, despite what the SV says. Is this only if
212 we're trapped in use 'bytes'? */
213 /* Make a copy of the octet sequence, but without the flag on,
214 as the compiler now honours the SvUTF8 flag on tmpstr. */
215 STRLEN len;
216 const char *const p = SvPV(tmpstr, len);
217 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
218 }
f3ec07c7
DM		 219 else if (SvAMAGIC(tmpstr)) {
220 /* make a copy to avoid extra stringifies */
0479a84a 221 tmpstr = newSVpvn_flags(t, len, SVs_TEMP | SvUTF8(tmpstr));
f3ec07c7 222 }
c737faaf 223
a9984b10
FC		 224 /* If it is gmagical, create a mortal copy, but without calling
225 get-magic, as we have already done that. */
226 if(SvGMAGICAL(tmpstr)) {
227 SV *mortalcopy = sv_newmortal();
228 sv_setsv_flags(mortalcopy, tmpstr, 0);
229 tmpstr = mortalcopy;
230 }
231
5a8697a7 232 if (eng)
3ab4a224 233 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
5a8697a7 234 else
3ab4a224 235 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 236
f86aaa29 237 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 238 inside tie/overload accessors. */
c277df42 239 }
4633a7c4 240 }
c737faaf
YO		 241
242 re = PM_GETRE(pm);
a0d0e21e 243
72311751 244#ifndef INCOMPLETE_TAINTS
3280af22 245 if (PL_tainting) {
9274aefd
DM		 246 if (PL_tainted) {
247 SvTAINTED_on((SV*)re);
07bc277f 248 RX_EXTFLAGS(re) |= RXf_TAINTED;
9274aefd 249 }
72311751
GS		 250 }
251#endif
252
220fc49f 253 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 254 pm = PL_curpm;
a0d0e21e 255
c737faaf
YO		 256
257#if !defined(USE_ITHREADS)
258 /* can't change the optree at runtime either */
259 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 260 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 261 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 262 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 263 }
c737faaf 264#endif
a0d0e21e
LW		 265 RETURN;
266}
267
268PP(pp_substcont)
269{
97aff369 270 dVAR;
39644a26 271 dSP;
c09156bb 272 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL		 273 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
274 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW		 275 register char *s = cx->sb_s;
276 register char *m = cx->sb_m;
277 char *orig = cx->sb_orig;
901017d6 278 register REGEXP * const rx = cx->sb_rx;
c445ea15 279 SV *nsv = NULL;
988e6e7e 280 REGEXP *old = PM_GETRE(pm);
f410a211
NC		 281
282 PERL_ASYNC_CHECK();
283
988e6e7e 284 if(old != rx) {
bfed75c6 285 if(old)
988e6e7e 286 ReREFCNT_dec(old);
d6106309 287 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB		 288 }
289
d9f97599 290 rxres_restore(&cx->sb_rxres, rx);
01b35787 291 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 292
a0d0e21e 293 if (cx->sb_iters++) {
a3b680e6 294 const I32 saviters = cx->sb_iters;
a0d0e21e 295 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 296 DIE(aTHX_ "Substitution loop");
a0d0e21e 297
447ee134
DM		 298 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
299
ef07e810 300 /* See "how taint works" above pp_subst() */
20be6587
DM		 301 if (SvTAINTED(TOPs))
302 cx->sb_rxtainted |= SUBST_TAINT_REPL;
447ee134 303 sv_catsv_nomg(dstr, POPs);
2c296965
YO		 304 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
305 s -= RX_GOFS(rx);
a0d0e21e
LW		 306
307 /* Are we done */
134b8cd8
NC		 308 /* I believe that we can't set REXEC_SCREAM here if
309 SvSCREAM(cx->sb_targ) is true because SvPVX(cx->sb_targ) isn't always
310 equal to s. [See the comment before Perl_re_intuit_start(), which is
311 called from Perl_regexec_flags(), which says that it should be when
312 SvSCREAM() is true.] s, cx->sb_strend and orig will be consistent
313 with SvPVX(cx->sb_targ), as substconst doesn't modify cx->sb_targ
314 during the match. */
2c296965
YO		 315 if (CxONCE(cx) || s < orig ||
316 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
317 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
318 ((cx->sb_rflags & REXEC_COPY_STR)
319 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
320 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 321 {
8ca8a454 322 SV *targ = cx->sb_targ;
748a9306 323
078c425b
JH		 324 assert(cx->sb_strend >= s);
325 if(cx->sb_strend > s) {
326 if (DO_UTF8(dstr) && !SvUTF8(targ))
327 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
328 else
329 sv_catpvn(dstr, s, cx->sb_strend - s);
330 }
20be6587
DM		 331 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
332 cx->sb_rxtainted |= SUBST_TAINT_PAT;
9212bbba 333
8ca8a454
NC		 334 if (pm->op_pmflags & PMf_NONDESTRUCT) {
335 PUSHs(dstr);
336 /* From here on down we're using the copy, and leaving the
337 original untouched. */
338 targ = dstr;
339 }
340 else {
f8c7b90f 341#ifdef PERL_OLD_COPY_ON_WRITE
8ca8a454
NC		 342 if (SvIsCOW(targ)) {
343 sv_force_normal_flags(targ, SV_COW_DROP_PV);
344 } else
ed252734 345#endif
8ca8a454
NC		 346 {
347 SvPV_free(targ);
348 }
349 SvPV_set(targ, SvPVX(dstr));
350 SvCUR_set(targ, SvCUR(dstr));
351 SvLEN_set(targ, SvLEN(dstr));
352 if (DO_UTF8(dstr))
353 SvUTF8_on(targ);
354 SvPV_set(dstr, NULL);
355
4f4d7508 356 mPUSHi(saviters - 1);
48c036b1 357
8ca8a454
NC		 358 (void)SvPOK_only_UTF8(targ);
359 }
5cd24f17 360
20be6587 361 /* update the taint state of various various variables in
ef07e810
DM		 362 * preparation for final exit.
363 * See "how taint works" above pp_subst() */
20be6587
DM		 364 if (PL_tainting) {
365 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
366 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
367 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
368 )
369 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
370
371 if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
372 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
373 )
374 SvTAINTED_on(TOPs); /* taint return value */
375 /* needed for mg_set below */
376 PL_tainted = cBOOL(cx->sb_rxtainted &
377 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL));
378 SvTAINT(TARG);
379 }
380 /* PL_tainted must be correctly set for this mg_set */
381 SvSETMAGIC(TARG);
382 TAINT_NOT;
4633a7c4 383 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW		 384 POPSUBST(cx);
385 RETURNOP(pm->op_next);
20be6587 386 /* NOTREACHED */
a0d0e21e 387 }
8e5e9ebe 388 cx->sb_iters = saviters;
a0d0e21e 389 }
07bc277f 390 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW		 391 m = s;
392 s = orig;
07bc277f 393 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW		 394 s = orig + (m - s);
395 cx->sb_strend = s + (cx->sb_strend - m);
396 }
07bc277f 397 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 398 if (m > s) {
bfed75c6 399 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH		 400 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
401 else
402 sv_catpvn(dstr, s, m-s);
403 }
07bc277f 404 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 405 { /* Update the pos() information. */
8ca8a454
NC		 406 SV * const sv
407 = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
084916e3 408 MAGIC *mg;
7a7f3e45 409 SvUPGRADE(sv, SVt_PVMG);
14befaf4 410 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 411#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 412 if (SvIsCOW(sv))
d83f0a82
NC		 413 sv_force_normal_flags(sv, 0);
414#endif
415 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
416 NULL, 0);
084916e3 417 }
ce474962 418 mg->mg_len = m - orig;
084916e3 419 }
988e6e7e 420 if (old != rx)
d6106309 421 (void)ReREFCNT_inc(rx);
20be6587 422 /* update the taint state of various various variables in preparation
ef07e810
DM		 423 * for calling the code block.
424 * See "how taint works" above pp_subst() */
20be6587
DM		 425 if (PL_tainting) {
426 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
427 cx->sb_rxtainted |= SUBST_TAINT_PAT;
428
429 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
430 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
431 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
432 )
433 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
434
435 if (cx->sb_iters > 1 && (cx->sb_rxtainted &
436 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
8ca8a454
NC		 437 SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
438 ? cx->sb_dstr : cx->sb_targ);
20be6587
DM		 439 TAINT_NOT;
440 }
d9f97599 441 rxres_save(&cx->sb_rxres, rx);
af9838cc 442 PL_curpm = pm;
29f2e912 443 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW		 444}
445
c90c0ff4 446void
864dbfa3 447Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 448{
449 UV *p = (UV*)*rsp;
450 U32 i;
7918f24d
NC		 451
452 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 453 PERL_UNUSED_CONTEXT;
c90c0ff4 454
07bc277f 455 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 456#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 457 i = 7 + RX_NPARENS(rx) * 2;
ed252734 458#else
07bc277f 459 i = 6 + RX_NPARENS(rx) * 2;
ed252734 460#endif
c90c0ff4 461 if (!p)
a02a5408 462 Newx(p, i, UV);
c90c0ff4 463 else
464 Renew(p, i, UV);
465 *rsp = (void*)p;
466 }
467
07bc277f 468 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 469 RX_MATCH_COPIED_off(rx);
c90c0ff4 470
f8c7b90f 471#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC		 472 *p++ = PTR2UV(RX_SAVED_COPY(rx));
473 RX_SAVED_COPY(rx) = NULL;
ed252734
NC		 474#endif
475
07bc277f 476 *p++ = RX_NPARENS(rx);
c90c0ff4 477
07bc277f
NC		 478 *p++ = PTR2UV(RX_SUBBEG(rx));
479 *p++ = (UV)RX_SUBLEN(rx);
480 for (i = 0; i <= RX_NPARENS(rx); ++i) {
481 *p++ = (UV)RX_OFFS(rx)[i].start;
482 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4 483 }
484}
485
9c105995
NC		 486static void
487S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 488{
489 UV *p = (UV*)*rsp;
490 U32 i;
7918f24d
NC		 491
492 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 493 PERL_UNUSED_CONTEXT;
c90c0ff4 494
ed252734 495 RX_MATCH_COPY_FREE(rx);
cf93c79d 496 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4 497 *p++ = 0;
498
f8c7b90f 499#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC		 500 if (RX_SAVED_COPY(rx))
501 SvREFCNT_dec (RX_SAVED_COPY(rx));
502 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC		 503 *p++ = 0;
504#endif
505
07bc277f 506 RX_NPARENS(rx) = *p++;
c90c0ff4 507
07bc277f
NC		 508 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
509 RX_SUBLEN(rx) = (I32)(*p++);
510 for (i = 0; i <= RX_NPARENS(rx); ++i) {
511 RX_OFFS(rx)[i].start = (I32)(*p++);
512 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4 513 }
514}
515
9c105995
NC		 516static void
517S_rxres_free(pTHX_ void **rsp)
c90c0ff4 518{
44f8325f 519 UV * const p = (UV*)*rsp;
7918f24d
NC		 520
521 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 522 PERL_UNUSED_CONTEXT;
c90c0ff4 523
524 if (p) {
94010e71
NC		 525#ifdef PERL_POISON
526 void *tmp = INT2PTR(char*,*p);
527 Safefree(tmp);
528 if (*p)
7e337ee0 529 PoisonFree(*p, 1, sizeof(*p));
94010e71 530#else
56431972 531 Safefree(INT2PTR(char*,*p));
94010e71 532#endif
f8c7b90f 533#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 534 if (p[1]) {
535 SvREFCNT_dec (INT2PTR(SV*,p[1]));
536 }
537#endif
c90c0ff4 538 Safefree(p);
4608196e 539 *rsp = NULL;
c90c0ff4 540 }
541}
542
a701009a
DM		 543#define FORM_NUM_BLANK (1<<30)
544#define FORM_NUM_POINT (1<<29)
545
a0d0e21e
LW		 546PP(pp_formline)
547{
97aff369 548 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 549 register SV * const tmpForm = *++MARK;
086b26f3
DM		 550 SV *formsv; /* contains text of original format */
551 register U32 *fpc; /* format ops program counter */
552 register char *t; /* current append position in target string */
553 const char *f; /* current position in format string */
a0d0e21e 554 register I32 arg;
086b26f3
DM		 555 register SV *sv = NULL; /* current item */
556 const char *item = NULL;/* string value of current item */
557 I32 itemsize = 0; /* length of current item, possibly truncated */
558 I32 fieldsize = 0; /* width of current field */
559 I32 lines = 0; /* number of lines that have been output */
560 bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
561 const char *chophere = NULL; /* where to chop current item */
f5ada144 562 STRLEN linemark = 0; /* pos of start of line in output */
65202027 563 NV value;
086b26f3 564 bool gotsome = FALSE; /* seen at least one non-blank item on this line */
a0d0e21e 565 STRLEN len;
26e935cf 566 STRLEN linemax; /* estimate of output size in bytes */
1bd51a4c
IH		 567 bool item_is_utf8 = FALSE;
568 bool targ_is_utf8 = FALSE;
bfed75c6 569 const char *fmt;
74e0ddf7 570 MAGIC *mg = NULL;
4ff700b9
DM		 571 U8 *source; /* source of bytes to append */
572 STRLEN to_copy; /* how may bytes to append */
ea60cfe8 573 char trans; /* what chars to translate */
74e0ddf7 574
3808a683 575 mg = doparseform(tmpForm);
a0d0e21e 576
74e0ddf7 577 fpc = (U32*)mg->mg_ptr;
3808a683
DM		 578 /* the actual string the format was compiled from.
579 * with overload etc, this may not match tmpForm */
580 formsv = mg->mg_obj;
581
74e0ddf7 582
3280af22 583 SvPV_force(PL_formtarget, len);
3808a683 584 if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
125b9982 585 SvTAINTED_on(PL_formtarget);
1bd51a4c
IH		 586 if (DO_UTF8(PL_formtarget))
587 targ_is_utf8 = TRUE;
26e935cf
DM		 588 linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
589 t = SvGROW(PL_formtarget, len + linemax + 1);
590 /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
a0d0e21e 591 t += len;
3808a683 592 f = SvPV_const(formsv, len);
a0d0e21e
LW		 593
594 for (;;) {
595 DEBUG_f( {
bfed75c6 596 const char *name = "???";
a0d0e21e
LW		 597 arg = -1;
598 switch (*fpc) {
599 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
600 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
601 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
602 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
603 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
604
605 case FF_CHECKNL: name = "CHECKNL"; break;
606 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
607 case FF_SPACE: name = "SPACE"; break;
608 case FF_HALFSPACE: name = "HALFSPACE"; break;
609 case FF_ITEM: name = "ITEM"; break;
610 case FF_CHOP: name = "CHOP"; break;
611 case FF_LINEGLOB: name = "LINEGLOB"; break;
612 case FF_NEWLINE: name = "NEWLINE"; break;
613 case FF_MORE: name = "MORE"; break;
614 case FF_LINEMARK: name = "LINEMARK"; break;
615 case FF_END: name = "END"; break;
bfed75c6 616 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 617 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW		 618 }
619 if (arg >= 0)
bf49b057 620 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 621 else
bf49b057 622 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 623 } );
a0d0e21e
LW		 624 switch (*fpc++) {
625 case FF_LINEMARK:
f5ada144 626 linemark = t - SvPVX(PL_formtarget);
a0d0e21e
LW		 627 lines++;
628 gotsome = FALSE;
629 break;
630
631 case FF_LITERAL:
ea60cfe8
DM		 632 to_copy = *fpc++;
633 source = (U8 *)f;
634 f += to_copy;
635 trans = '~';
75645721 636 item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
ea60cfe8 637 goto append;
a0d0e21e
LW		 638
639 case FF_SKIP:
640 f += *fpc++;
641 break;
642
643 case FF_FETCH:
644 arg = *fpc++;
645 f += arg;
646 fieldsize = arg;
647
648 if (MARK < SP)
649 sv = *++MARK;
650 else {
3280af22 651 sv = &PL_sv_no;
a2a5de95 652 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e 653 }
125b9982
NT		 654 if (SvTAINTED(sv))
655 SvTAINTED_on(PL_formtarget);
a0d0e21e
LW		 656 break;
657
658 case FF_CHECKNL:
5a34cab7
NC		 659 {
660 const char *send;
661 const char *s = item = SvPV_const(sv, len);
662 itemsize = len;
663 if (DO_UTF8(sv)) {
664 itemsize = sv_len_utf8(sv);
665 if (itemsize != (I32)len) {
666 I32 itembytes;
667 if (itemsize > fieldsize) {
668 itemsize = fieldsize;
669 itembytes = itemsize;
670 sv_pos_u2b(sv, &itembytes, 0);
671 }
672 else
673 itembytes = len;
674 send = chophere = s + itembytes;
675 while (s < send) {
676 if (*s & ~31)
677 gotsome = TRUE;
678 else if (*s == '\n')
679 break;
680 s++;
681 }
682 item_is_utf8 = TRUE;
683 itemsize = s - item;
684 sv_pos_b2u(sv, &itemsize);
685 break;
a0ed51b3 686 }
a0ed51b3 687 }
5a34cab7
NC		 688 item_is_utf8 = FALSE;
689 if (itemsize > fieldsize)
690 itemsize = fieldsize;
691 send = chophere = s + itemsize;
692 while (s < send) {
693 if (*s & ~31)
694 gotsome = TRUE;
695 else if (*s == '\n')
696 break;
697 s++;
698 }
699 itemsize = s - item;
700 break;
a0ed51b3 701 }
a0d0e21e
LW		 702
703 case FF_CHECKCHOP:
5a34cab7
NC		 704 {
705 const char *s = item = SvPV_const(sv, len);
706 itemsize = len;
707 if (DO_UTF8(sv)) {
708 itemsize = sv_len_utf8(sv);
709 if (itemsize != (I32)len) {
710 I32 itembytes;
711 if (itemsize <= fieldsize) {
712 const char *send = chophere = s + itemsize;
713 while (s < send) {
714 if (*s == '\r') {
715 itemsize = s - item;
a0ed51b3 716 chophere = s;
a0ed51b3 717 break;
5a34cab7
NC		 718 }
719 if (*s++ & ~31)
a0ed51b3 720 gotsome = TRUE;
a0ed51b3 721 }
a0ed51b3 722 }
5a34cab7
NC		 723 else {
724 const char *send;
725 itemsize = fieldsize;
726 itembytes = itemsize;
727 sv_pos_u2b(sv, &itembytes, 0);
728 send = chophere = s + itembytes;
729 while (s < send || (s == send && isSPACE(*s))) {
730 if (isSPACE(*s)) {
731 if (chopspace)
732 chophere = s;
733 if (*s == '\r')
734 break;
735 }
736 else {
737 if (*s & ~31)
738 gotsome = TRUE;
739 if (strchr(PL_chopset, *s))
740 chophere = s + 1;
741 }
742 s++;
743 }
744 itemsize = chophere - item;
745 sv_pos_b2u(sv, &itemsize);
746 }
747 item_is_utf8 = TRUE;
a0d0e21e
LW		 748 break;
749 }
a0d0e21e 750 }
5a34cab7
NC		 751 item_is_utf8 = FALSE;
752 if (itemsize <= fieldsize) {
753 const char *const send = chophere = s + itemsize;
754 while (s < send) {
755 if (*s == '\r') {
756 itemsize = s - item;
a0d0e21e 757 chophere = s;
a0d0e21e 758 break;
5a34cab7
NC		 759 }
760 if (*s++ & ~31)
a0d0e21e 761 gotsome = TRUE;
a0d0e21e 762 }
a0d0e21e 763 }
5a34cab7
NC		 764 else {
765 const char *send;
766 itemsize = fieldsize;
767 send = chophere = s + itemsize;
768 while (s < send || (s == send && isSPACE(*s))) {
769 if (isSPACE(*s)) {
770 if (chopspace)
771 chophere = s;
772 if (*s == '\r')
773 break;
774 }
775 else {
776 if (*s & ~31)
777 gotsome = TRUE;
778 if (strchr(PL_chopset, *s))
779 chophere = s + 1;
780 }
781 s++;
782 }
783 itemsize = chophere - item;
784 }
785 break;
a0d0e21e 786 }
a0d0e21e
LW		 787
788 case FF_SPACE:
789 arg = fieldsize - itemsize;
790 if (arg) {
791 fieldsize -= arg;
792 while (arg-- > 0)
793 *t++ = ' ';
794 }
795 break;
796
797 case FF_HALFSPACE:
798 arg = fieldsize - itemsize;
799 if (arg) {
800 arg /= 2;
801 fieldsize -= arg;
802 while (arg-- > 0)
803 *t++ = ' ';
804 }
805 break;
806
807 case FF_ITEM:
8aa7beb6
DM		 808 to_copy = itemsize;
809 source = (U8 *)item;
810 trans = 1;
811 if (item_is_utf8) {
812 /* convert to_copy from chars to bytes */
813 U8 *s = source;
814 while (to_copy--)
815 s += UTF8SKIP(s);
816 to_copy = s - source;
a0d0e21e 817 }
8aa7beb6 818 goto append;
a0d0e21e
LW		 819
820 case FF_CHOP:
5a34cab7
NC		 821 {
822 const char *s = chophere;
823 if (chopspace) {
af68e756 824 while (isSPACE(*s))
5a34cab7
NC		 825 s++;
826 }
827 sv_chop(sv,s);
828 SvSETMAGIC(sv);
829 break;
a0d0e21e 830 }
a0d0e21e 831
a1b95068
WL		 832 case FF_LINESNGL:
833 chopspace = 0;
a0d0e21e 834 case FF_LINEGLOB:
5a34cab7 835 {
e32383e2 836 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 837 const char *s = item = SvPV_const(sv, len);
7440a75b 838 const char *const send = s + len;
7440a75b 839
f3f2f1a3 840 item_is_utf8 = DO_UTF8(sv);
a1137ee5 841 if (!len)
7440a75b 842 break;
ea60cfe8 843 trans = 0;
0d21cefe 844 gotsome = TRUE;
a1137ee5 845 chophere = s + len;
4ff700b9
DM		 846 source = (U8 *) s;
847 to_copy = len;
0d21cefe
DM		 848 while (s < send) {
849 if (*s++ == '\n') {
850 if (oneline) {
851 to_copy = s - SvPVX_const(sv) - 1;
852 chophere = s;
853 break;
854 } else {
855 if (s == send) {
0d21cefe
DM		 856 to_copy--;
857 } else
858 lines++;
1bd51a4c 859 }
a0d0e21e 860 }
0d21cefe 861 }
a2c0032b
DM		 862 }
863
ea60cfe8
DM		 864 append:
865 /* append to_copy bytes from source to PL_formstring.
866 * item_is_utf8 implies source is utf8.
867 * if trans, translate certain characters during the copy */
a2c0032b
DM		 868 {
869 U8 *tmp = NULL;
26e935cf 870 STRLEN grow = 0;
0325ce87
DM		 871
872 SvCUR_set(PL_formtarget,
873 t - SvPVX_const(PL_formtarget));
874
0d21cefe
DM		 875 if (targ_is_utf8 && !item_is_utf8) {
876 source = tmp = bytes_to_utf8(source, &to_copy);
0d21cefe
DM		 877 } else {
878 if (item_is_utf8 && !targ_is_utf8) {
f5ada144 879 U8 *s;
0d21cefe 880 /* Upgrade targ to UTF8, and then we reduce it to
0325ce87
DM		 881 a problem we have a simple solution for.
882 Don't need get magic. */
0d21cefe 883 sv_utf8_upgrade_nomg(PL_formtarget);
0325ce87 884 targ_is_utf8 = TRUE;
f5ada144
DM		 885 /* re-calculate linemark */
886 s = (U8*)SvPVX(PL_formtarget);
26e935cf
DM		 887 /* the bytes we initially allocated to append the
888 * whole line may have been gobbled up during the
889 * upgrade, so allocate a whole new line's worth
890 * for safety */
891 grow = linemax;
f5ada144
DM		 892 while (linemark--)
893 s += UTF8SKIP(s);
894 linemark = s - (U8*)SvPVX(PL_formtarget);
e8e72d41 895 }
0d21cefe
DM		 896 /* Easy. They agree. */
897 assert (item_is_utf8 == targ_is_utf8);
898 }
26e935cf
DM		 899 if (!trans)
900 /* @* and ^* are the only things that can exceed
901 * the linemax, so grow by the output size, plus
902 * a whole new form's worth in case of any further
903 * output */
904 grow = linemax + to_copy;
905 if (grow)
906 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
0d21cefe
DM		 907 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
908
909 Copy(source, t, to_copy, char);
ea60cfe8 910 if (trans) {
8aa7beb6
DM		 911 /* blank out ~ or control chars, depending on trans.
912 * works on bytes not chars, so relies on not
913 * matching utf8 continuation bytes */
ea60cfe8
DM		 914 U8 *s = (U8*)t;
915 U8 *send = s + to_copy;
916 while (s < send) {
8aa7beb6
DM		 917 const int ch = *s;
918 if (trans == '~' ? (ch == '~') :
919#ifdef EBCDIC
920 iscntrl(ch)
921#else
922 (!(ch & ~31))
923#endif
924 )
ea60cfe8
DM		 925 *s = ' ';
926 s++;
927 }
928 }
929
0d21cefe
DM		 930 t += to_copy;
931 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
a1137ee5 932 if (tmp)
0d21cefe 933 Safefree(tmp);
5a34cab7 934 break;
a0d0e21e 935 }
a0d0e21e 936
a1b95068
WL		 937 case FF_0DECIMAL:
938 arg = *fpc++;
939#if defined(USE_LONG_DOUBLE)
10edeb5d 940 fmt = (const char *)
a701009a 941 ((arg & FORM_NUM_POINT) ?
10edeb5d 942 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 943#else
10edeb5d 944 fmt = (const char *)
a701009a 945 ((arg & FORM_NUM_POINT) ?
10edeb5d 946 "%#0*.*f" : "%0*.*f");
a1b95068
WL		 947#endif
948 goto ff_dec;
a0d0e21e 949 case FF_DECIMAL:
a0d0e21e 950 arg = *fpc++;
65202027 951#if defined(USE_LONG_DOUBLE)
10edeb5d 952 fmt = (const char *)
a701009a 953 ((arg & FORM_NUM_POINT) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 954#else
10edeb5d 955 fmt = (const char *)
a701009a 956 ((arg & FORM_NUM_POINT) ? "%#*.*f" : "%*.*f");
65202027 957#endif
a1b95068 958 ff_dec:
784707d5
JP		 959 /* If the field is marked with ^ and the value is undefined,
960 blank it out. */
a701009a 961 if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
784707d5
JP		 962 arg = fieldsize;
963 while (arg--)
964 *t++ = ' ';
965 break;
966 }
967 gotsome = TRUE;
968 value = SvNV(sv);
a1b95068 969 /* overflow evidence */
bfed75c6 970 if (num_overflow(value, fieldsize, arg)) {
a1b95068
WL		 971 arg = fieldsize;
972 while (arg--)
973 *t++ = '#';
974 break;
975 }
784707d5
JP		 976 /* Formats aren't yet marked for locales, so assume "yes". */
977 {
978 STORE_NUMERIC_STANDARD_SET_LOCAL();
a701009a
DM		 979 arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
980 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg, value);
784707d5
JP		 981 RESTORE_NUMERIC_STANDARD();
982 }
983 t += fieldsize;
984 break;
a1b95068 985
a0d0e21e
LW		 986 case FF_NEWLINE:
987 f++;
f5ada144 988 while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
a0d0e21e
LW		 989 t++;
990 *t++ = '\n';
991 break;
992
993 case FF_BLANK:
994 arg = *fpc++;
995 if (gotsome) {
996 if (arg) { /* repeat until fields exhausted? */
11f9eeaf
DM		 997 fpc--;
998 goto end;
a0d0e21e
LW		 999 }
1000 }
1001 else {
f5ada144 1002 t = SvPVX(PL_formtarget) + linemark;
a0d0e21e
LW		 1003 lines--;
1004 }
1005 break;
1006
1007 case FF_MORE:
5a34cab7
NC		 1008 {
1009 const char *s = chophere;
1010 const char *send = item + len;
1011 if (chopspace) {
af68e756 1012 while (isSPACE(*s) && (s < send))
5a34cab7 1013 s++;
a0d0e21e 1014 }
5a34cab7
NC		 1015 if (s < send) {
1016 char *s1;
1017 arg = fieldsize - itemsize;
1018 if (arg) {
1019 fieldsize -= arg;
1020 while (arg-- > 0)
1021 *t++ = ' ';
1022 }
1023 s1 = t - 3;
1024 if (strnEQ(s1," ",3)) {
1025 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
1026 s1--;
1027 }
1028 *s1++ = '.';
1029 *s1++ = '.';
1030 *s1++ = '.';
a0d0e21e 1031 }
5a34cab7 1032 break;
a0d0e21e 1033 }
a0d0e21e 1034 case FF_END:
11f9eeaf 1035 end:
bf2bec63 1036 assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
a0d0e21e 1037 *t = '\0';
b15aece3 1038 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH		 1039 if (targ_is_utf8)
1040 SvUTF8_on(PL_formtarget);
3280af22 1041 FmLINES(PL_formtarget) += lines;
a0d0e21e 1042 SP = ORIGMARK;
11f9eeaf
DM		 1043 if (fpc[-1] == FF_BLANK)
1044 RETURNOP(cLISTOP->op_first);
1045 else
1046 RETPUSHYES;
a0d0e21e
LW		 1047 }
1048 }
1049}
1050
1051PP(pp_grepstart)
1052{
27da23d5 1053 dVAR; dSP;
a0d0e21e
LW		 1054 SV *src;
1055
3280af22 1056 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 1057 (void)POPMARK;
54310121 1058 if (GIMME_V == G_SCALAR)
6e449a3a 1059 mXPUSHi(0);
533c011a 1060 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 1061 }
3280af22 1062 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
897d3989
NC		 1063 Perl_pp_pushmark(aTHX); /* push dst */
1064 Perl_pp_pushmark(aTHX); /* push src */
d343c3ef 1065 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW		 1066
1067 SAVETMPS;
59f00321
RGS		 1068 if (PL_op->op_private & OPpGREP_LEX)
1069 SAVESPTR(PAD_SVl(PL_op->op_targ));
1070 else
1071 SAVE_DEFSV;
d343c3ef 1072 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1073 SAVEVPTR(PL_curpm);
a0d0e21e 1074
3280af22 1075 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 1076 SvTEMP_off(src);
59f00321
RGS		 1077 if (PL_op->op_private & OPpGREP_LEX)
1078 PAD_SVl(PL_op->op_targ) = src;
1079 else
414bf5ae 1080 DEFSV_set(src);
a0d0e21e
LW		 1081
1082 PUTBACK;
533c011a 1083 if (PL_op->op_type == OP_MAPSTART)
897d3989 1084 Perl_pp_pushmark(aTHX); /* push top */
533c011a 1085 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW		 1086}
1087
a0d0e21e
LW		 1088PP(pp_mapwhile)
1089{
27da23d5 1090 dVAR; dSP;
f54cb97a 1091 const I32 gimme = GIMME_V;
544f3153 1092 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW		 1093 I32 count;
1094 I32 shift;
1095 SV** src;
ac27b0f5 1096 SV** dst;
a0d0e21e 1097
544f3153 1098 /* first, move source pointer to the next item in the source list */
3280af22 1099 ++PL_markstack_ptr[-1];
544f3153
GS		 1100
1101 /* if there are new items, push them into the destination list */
4c90a460 1102 if (items && gimme != G_VOID) {
544f3153
GS		 1103 /* might need to make room back there first */
1104 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1105 /* XXX this implementation is very pessimal because the stack
1106 * is repeatedly extended for every set of items. Is possible
1107 * to do this without any stack extension or copying at all
1108 * by maintaining a separate list over which the map iterates
18ef8bea 1109 * (like foreach does). --gsar */
544f3153
GS		 1110
1111 /* everything in the stack after the destination list moves
1112 * towards the end the stack by the amount of room needed */
1113 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1114
1115 /* items to shift up (accounting for the moved source pointer) */
1116 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT		 1117
1118 /* This optimization is by Ben Tilly and it does
1119 * things differently from what Sarathy (gsar)
1120 * is describing. The downside of this optimization is
1121 * that leaves "holes" (uninitialized and hopefully unused areas)
1122 * to the Perl stack, but on the other hand this
1123 * shouldn't be a problem. If Sarathy's idea gets
1124 * implemented, this optimization should become
1125 * irrelevant. --jhi */
1126 if (shift < count)
1127 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1128
924508f0
GS		 1129 EXTEND(SP,shift);
1130 src = SP;
1131 dst = (SP += shift);
3280af22
NIS		 1132 PL_markstack_ptr[-1] += shift;
1133 *PL_markstack_ptr += shift;
544f3153 1134 while (count--)
a0d0e21e
LW		 1135 *dst-- = *src--;
1136 }
544f3153 1137 /* copy the new items down to the destination list */
ac27b0f5 1138 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26 1139 if (gimme == G_ARRAY) {
b2a2a901
DM		 1140 /* add returned items to the collection (making mortal copies
1141 * if necessary), then clear the current temps stack frame
1142 * *except* for those items. We do this splicing the items
1143 * into the start of the tmps frame (so some items may be on
59d53fd6 1144 * the tmps stack twice), then moving PL_tmps_floor above
b2a2a901
DM		 1145 * them, then freeing the frame. That way, the only tmps that
1146 * accumulate over iterations are the return values for map.
1147 * We have to do to this way so that everything gets correctly
1148 * freed if we die during the map.
1149 */
1150 I32 tmpsbase;
1151 I32 i = items;
1152 /* make space for the slice */
1153 EXTEND_MORTAL(items);
1154 tmpsbase = PL_tmps_floor + 1;
1155 Move(PL_tmps_stack + tmpsbase,
1156 PL_tmps_stack + tmpsbase + items,
1157 PL_tmps_ix - PL_tmps_floor,
1158 SV*);
1159 PL_tmps_ix += items;
1160
1161 while (i-- > 0) {
1162 SV *sv = POPs;
1163 if (!SvTEMP(sv))
1164 sv = sv_mortalcopy(sv);
1165 *dst-- = sv;
1166 PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
1167 }
1168 /* clear the stack frame except for the items */
1169 PL_tmps_floor += items;
1170 FREETMPS;
1171 /* FREETMPS may have cleared the TEMP flag on some of the items */
1172 i = items;
1173 while (i-- > 0)
1174 SvTEMP_on(PL_tmps_stack[--tmpsbase]);
22023b26 1175 }
bfed75c6 1176 else {
22023b26
TP		 1177 /* scalar context: we don't care about which values map returns
1178 * (we use undef here). And so we certainly don't want to do mortal
1179 * copies of meaningless values. */
1180 while (items-- > 0) {
b988aa42 1181 (void)POPs;
22023b26
TP		 1182 *dst-- = &PL_sv_undef;
1183 }
b2a2a901 1184 FREETMPS;
22023b26 1185 }
a0d0e21e 1186 }
b2a2a901
DM		 1187 else {
1188 FREETMPS;
1189 }
d343c3ef 1190 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW		 1191
1192 /* All done yet? */
3280af22 1193 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW		 1194
1195 (void)POPMARK; /* pop top */
d343c3ef 1196 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1197 (void)POPMARK; /* pop src */
3280af22 1198 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1199 (void)POPMARK; /* pop dst */
3280af22 1200 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1201 if (gimme == G_SCALAR) {
7cc47870
RGS		 1202 if (PL_op->op_private & OPpGREP_LEX) {
1203 SV* sv = sv_newmortal();
1204 sv_setiv(sv, items);
1205 PUSHs(sv);
1206 }
1207 else {
1208 dTARGET;
1209 XPUSHi(items);
1210 }
a0d0e21e 1211 }
54310121 1212 else if (gimme == G_ARRAY)
1213 SP += items;
a0d0e21e
LW		 1214 RETURN;
1215 }
1216 else {
1217 SV *src;
1218
d343c3ef 1219 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1220 SAVEVPTR(PL_curpm);
a0d0e21e 1221
544f3153 1222 /* set $_ to the new source item */
3280af22 1223 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1224 SvTEMP_off(src);
59f00321
RGS		 1225 if (PL_op->op_private & OPpGREP_LEX)
1226 PAD_SVl(PL_op->op_targ) = src;
1227 else
414bf5ae 1228 DEFSV_set(src);
a0d0e21e
LW		 1229
1230 RETURNOP(cLOGOP->op_other);
1231 }
1232}
1233
a0d0e21e
LW		 1234/* Range stuff. */
1235
1236PP(pp_range)
1237{
97aff369 1238 dVAR;
a0d0e21e 1239 if (GIMME == G_ARRAY)
1a67a97c 1240 return NORMAL;
538573f7 1241 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1242 return cLOGOP->op_other;
538573f7 1243 else
1a67a97c 1244 return NORMAL;
a0d0e21e
LW		 1245}
1246
1247PP(pp_flip)
1248{
97aff369 1249 dVAR;
39644a26 1250 dSP;
a0d0e21e
LW		 1251
1252 if (GIMME == G_ARRAY) {
1a67a97c 1253 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1254 }
1255 else {
1256 dTOPss;
44f8325f 1257 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1258 int flip = 0;
790090df 1259
bfed75c6 1260 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST		 1261 if (GvIO(PL_last_in_gv)) {
1262 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1263 }
1264 else {
fafc274c 1265 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL		 1266 if (gv && GvSV(gv))
1267 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1268 }
bfed75c6
AL		 1269 } else {
1270 flip = SvTRUE(sv);
1271 }
1272 if (flip) {
a0d0e21e 1273 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1274 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1275 sv_setiv(targ, 1);
3e3baf6d 1276 SETs(targ);
a0d0e21e
LW		 1277 RETURN;
1278 }
1279 else {
1280 sv_setiv(targ, 0);
924508f0 1281 SP--;
1a67a97c 1282 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1283 }
1284 }
76f68e9b 1285 sv_setpvs(TARG, "");
a0d0e21e
LW		 1286 SETs(targ);
1287 RETURN;
1288 }
1289}
1290
8e9bbdb9
RGS		 1291/* This code tries to decide if "$left .. $right" should use the
1292 magical string increment, or if the range is numeric (we make
1293 an exception for .."0" [#18165]). AMS 20021031. */
1294
1295#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS		 1296 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1297 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1298 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1299 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1300 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1301
a0d0e21e
LW		 1302PP(pp_flop)
1303{
97aff369 1304 dVAR; dSP;
a0d0e21e
LW		 1305
1306 if (GIMME == G_ARRAY) {
1307 dPOPPOPssrl;
86cb7173 1308
5b295bef
RD		 1309 SvGETMAGIC(left);
1310 SvGETMAGIC(right);
a0d0e21e 1311
8e9bbdb9 1312 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL		 1313 register IV i, j;
1314 IV max;
f52e41ad
FC		 1315 if ((SvOK(left) && SvNV_nomg(left) < IV_MIN) ||
1316 (SvOK(right) && SvNV_nomg(right) > IV_MAX))
d470f89e 1317 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC		 1318 i = SvIV_nomg(left);
1319 max = SvIV_nomg(right);
bbce6d69 1320 if (max >= i) {
c1ab3db2
AK		 1321 j = max - i + 1;
1322 EXTEND_MORTAL(j);
1323 EXTEND(SP, j);
bbce6d69 1324 }
c1ab3db2
AK		 1325 else
1326 j = 0;
1327 while (j--) {
901017d6 1328 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW		 1329 PUSHs(sv);
1330 }
1331 }
1332 else {
13c5b33c 1333 STRLEN len;
f52e41ad 1334 const char * const tmps = SvPV_nomg_const(right, len);
a0d0e21e 1335
f52e41ad
FC		 1336 SV *sv = sv_newmortal();
1337 sv_setsv_nomg(sv, left);
13c5b33c 1338 SvPV_force_nolen(sv);
89ea2908 1339 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1340 XPUSHs(sv);
b15aece3 1341 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1342 break;
a0d0e21e
LW		 1343 sv = sv_2mortal(newSVsv(sv));
1344 sv_inc(sv);
1345 }
a0d0e21e
LW		 1346 }
1347 }
1348 else {
1349 dTOPss;
901017d6 1350 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1351 int flop = 0;
a0d0e21e 1352 sv_inc(targ);
4e3399f9
YST		 1353
1354 if (PL_op->op_private & OPpFLIP_LINENUM) {
1355 if (GvIO(PL_last_in_gv)) {
1356 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1357 }
1358 else {
fafc274c 1359 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST		 1360 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1361 }
1362 }
1363 else {
1364 flop = SvTRUE(sv);
1365 }
1366
1367 if (flop) {
a0d0e21e 1368 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1369 sv_catpvs(targ, "E0");
a0d0e21e
LW		 1370 }
1371 SETs(targ);
1372 }
1373
1374 RETURN;
1375}
1376
1377/* Control. */
1378
27da23d5 1379static const char * const context_name[] = {
515afda2 1380 "pseudo-block",
f31522f3 1381 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1382 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1383 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC		 1384 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1385 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1386 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1387 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1388 "subroutine",
76753e7f 1389 "format",
515afda2 1390 "eval",
515afda2 1391 "substitution",
515afda2
NC		 1392};
1393
76e3520e 1394STATIC I32
06b5626a 1395S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1396{
97aff369 1397 dVAR;
a0d0e21e 1398 register I32 i;
a0d0e21e 1399
7918f24d
NC		 1400 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1401
a0d0e21e 1402 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1403 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1404 switch (CxTYPE(cx)) {
a0d0e21e 1405 case CXt_SUBST:
a0d0e21e 1406 case CXt_SUB:
7766f137 1407 case CXt_FORMAT:
a0d0e21e 1408 case CXt_EVAL:
0a753a76 1409 case CXt_NULL:
a2a5de95
NC		 1410 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1411 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC		 1412 if (CxTYPE(cx) == CXt_NULL)
1413 return -1;
1414 break;
c6fdafd0 1415 case CXt_LOOP_LAZYIV:
d01136d6 1416 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1417 case CXt_LOOP_FOR:
1418 case CXt_LOOP_PLAIN:
7e8f1eac
AD		 1419 {
1420 const char *cx_label = CxLABEL(cx);
1421 if (!cx_label || strNE(label, cx_label) ) {
1c98cc53 1422 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1423 (long)i, cx_label));
a0d0e21e
LW		 1424 continue;
1425 }
1c98cc53 1426 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1427 return i;
7e8f1eac 1428 }
a0d0e21e
LW		 1429 }
1430 }
1431 return i;
1432}
1433
0d863452
RH		 1434
1435
e50aee73 1436I32
864dbfa3 1437Perl_dowantarray(pTHX)
e50aee73 1438{
97aff369 1439 dVAR;
f54cb97a 1440 const I32 gimme = block_gimme();
54310121 1441 return (gimme == G_VOID) ? G_SCALAR : gimme;
1442}
1443
1444I32
864dbfa3 1445Perl_block_gimme(pTHX)
54310121 1446{
97aff369 1447 dVAR;
06b5626a 1448 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1449 if (cxix < 0)
46fc3d4c 1450 return G_VOID;
e50aee73 1451
54310121 1452 switch (cxstack[cxix].blk_gimme) {
d2719217
GS		 1453 case G_VOID:
1454 return G_VOID;
54310121 1455 case G_SCALAR:
e50aee73 1456 return G_SCALAR;
54310121 1457 case G_ARRAY:
1458 return G_ARRAY;
1459 default:
cea2e8a9 1460 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS		 1461 /* NOTREACHED */
1462 return 0;
54310121 1463 }
e50aee73
AD		 1464}
1465
78f9721b
SM		 1466I32
1467Perl_is_lvalue_sub(pTHX)
1468{
97aff369 1469 dVAR;
06b5626a 1470 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM		 1471 assert(cxix >= 0); /* We should only be called from inside subs */
1472
bafb2adc
NC		 1473 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1474 return CxLVAL(cxstack + cxix);
78f9721b
SM		 1475 else
1476 return 0;
1477}
1478
777d9014
FC		 1479/* only used by PUSHSUB */
1480I32
1481Perl_was_lvalue_sub(pTHX)
1482{
1483 dVAR;
1484 const I32 cxix = dopoptosub(cxstack_ix-1);
1485 assert(cxix >= 0); /* We should only be called from inside subs */
1486
1487 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1488 return CxLVAL(cxstack + cxix);
1489 else
1490 return 0;
1491}
1492
76e3520e 1493STATIC I32
901017d6 1494S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1495{
97aff369 1496 dVAR;
a0d0e21e 1497 I32 i;
7918f24d
NC		 1498
1499 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1500
a0d0e21e 1501 for (i = startingblock; i >= 0; i--) {
901017d6 1502 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1503 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1504 default:
1505 continue;
1506 case CXt_EVAL:
1507 case CXt_SUB:
7766f137 1508 case CXt_FORMAT:
1c98cc53 1509 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1510 return i;
1511 }
1512 }
1513 return i;
1514}
1515
76e3520e 1516STATIC I32
cea2e8a9 1517S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1518{
97aff369 1519 dVAR;
a0d0e21e 1520 I32 i;
a0d0e21e 1521 for (i = startingblock; i >= 0; i--) {
06b5626a 1522 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1523 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1524 default:
1525 continue;
1526 case CXt_EVAL:
1c98cc53 1527 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1528 return i;
1529 }
1530 }
1531 return i;
1532}
1533
76e3520e 1534STATIC I32
cea2e8a9 1535S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1536{
97aff369 1537 dVAR;
a0d0e21e 1538 I32 i;
a0d0e21e 1539 for (i = startingblock; i >= 0; i--) {
901017d6 1540 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1541 switch (CxTYPE(cx)) {
a0d0e21e 1542 case CXt_SUBST:
a0d0e21e 1543 case CXt_SUB:
7766f137 1544 case CXt_FORMAT:
a0d0e21e 1545 case CXt_EVAL:
0a753a76 1546 case CXt_NULL:
a2a5de95
NC		 1547 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1548 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC		 1549 if ((CxTYPE(cx)) == CXt_NULL)
1550 return -1;
1551 break;
c6fdafd0 1552 case CXt_LOOP_LAZYIV:
d01136d6 1553 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1554 case CXt_LOOP_FOR:
1555 case CXt_LOOP_PLAIN:
1c98cc53 1556 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1557 return i;
1558 }
1559 }
1560 return i;
1561}
1562
0d863452
RH		 1563STATIC I32
1564S_dopoptogiven(pTHX_ I32 startingblock)
1565{
97aff369 1566 dVAR;
0d863452
RH		 1567 I32 i;
1568 for (i = startingblock; i >= 0; i--) {
1569 register const PERL_CONTEXT *cx = &cxstack[i];
1570 switch (CxTYPE(cx)) {
1571 default:
1572 continue;
1573 case CXt_GIVEN:
1c98cc53 1574 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1575 return i;
3b719c58
NC		 1576 case CXt_LOOP_PLAIN:
1577 assert(!CxFOREACHDEF(cx));
1578 break;
c6fdafd0 1579 case CXt_LOOP_LAZYIV:
d01136d6 1580 case CXt_LOOP_LAZYSV:
3b719c58 1581 case CXt_LOOP_FOR:
0d863452 1582 if (CxFOREACHDEF(cx)) {
1c98cc53 1583 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH		 1584 return i;
1585 }
1586 }
1587 }
1588 return i;
1589}
1590
1591STATIC I32
1592S_dopoptowhen(pTHX_ I32 startingblock)
1593{
97aff369 1594 dVAR;
0d863452
RH		 1595 I32 i;
1596 for (i = startingblock; i >= 0; i--) {
1597 register const PERL_CONTEXT *cx = &cxstack[i];
1598 switch (CxTYPE(cx)) {
1599 default:
1600 continue;
1601 case CXt_WHEN:
1c98cc53 1602 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH		 1603 return i;
1604 }
1605 }
1606 return i;
1607}
1608
a0d0e21e 1609void
864dbfa3 1610Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1611{
97aff369 1612 dVAR;
a0d0e21e
LW		 1613 I32 optype;
1614
f144f1e3
DM		 1615 if (!PL_curstackinfo) /* can happen if die during thread cloning */
1616 return;
1617
a0d0e21e 1618 while (cxstack_ix > cxix) {
b0d9ce38 1619 SV *sv;
06b5626a 1620 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1621 DEBUG_CX("UNWIND"); \
a0d0e21e 1622 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1623 switch (CxTYPE(cx)) {
c90c0ff4 1624 case CXt_SUBST:
1625 POPSUBST(cx);
1626 continue; /* not break */
a0d0e21e 1627 case CXt_SUB:
b0d9ce38
GS		 1628 POPSUB(cx,sv);
1629 LEAVESUB(sv);
a0d0e21e
LW		 1630 break;
1631 case CXt_EVAL:
1632 POPEVAL(cx);
1633 break;
c6fdafd0 1634 case CXt_LOOP_LAZYIV:
d01136d6 1635 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1636 case CXt_LOOP_FOR:
1637 case CXt_LOOP_PLAIN:
a0d0e21e
LW		 1638 POPLOOP(cx);
1639 break;
0a753a76 1640 case CXt_NULL:
a0d0e21e 1641 break;
7766f137
GS		 1642 case CXt_FORMAT:
1643 POPFORMAT(cx);
1644 break;
a0d0e21e 1645 }
c90c0ff4 1646 cxstack_ix--;
a0d0e21e 1647 }
1b6737cc 1648 PERL_UNUSED_VAR(optype);
a0d0e21e
LW		 1649}
1650
5a844595
GS		 1651void
1652Perl_qerror(pTHX_ SV *err)
1653{
97aff369 1654 dVAR;
7918f24d
NC		 1655
1656 PERL_ARGS_ASSERT_QERROR;
1657
6b2fb389
DM		 1658 if (PL_in_eval) {
1659 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF		 1660 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1661 SVfARG(err));
6b2fb389
DM		 1662 }
1663 else
1664 sv_catsv(ERRSV, err);
1665 }
5a844595
GS		 1666 else if (PL_errors)
1667 sv_catsv(PL_errors, err);
1668 else
be2597df 1669 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM		 1670 if (PL_parser)
1671 ++PL_parser->error_count;
5a844595
GS		 1672}
1673
bb4c52e0 1674void
c5df3096 1675Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1676{
27da23d5 1677 dVAR;
c5df3096 1678 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1679 U8 in_eval = PL_in_eval;
c5df3096 1680 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1681
96d9b9cd 1682 if (in_eval) {
a0d0e21e 1683 I32 cxix;
a0d0e21e 1684 I32 gimme;
a0d0e21e 1685
22a30693
Z		 1686 /*
1687 * Historically, perl used to set ERRSV ($@) early in the die
1688 * process and rely on it not getting clobbered during unwinding.
1689 * That sucked, because it was liable to get clobbered, so the
1690 * setting of ERRSV used to emit the exception from eval{} has
1691 * been moved to much later, after unwinding (see just before
1692 * JMPENV_JUMP below). However, some modules were relying on the
1693 * early setting, by examining $@ during unwinding to use it as
1694 * a flag indicating whether the current unwinding was caused by
1695 * an exception. It was never a reliable flag for that purpose,
1696 * being totally open to false positives even without actual
1697 * clobberage, but was useful enough for production code to
1698 * semantically rely on it.
1699 *
1700 * We'd like to have a proper introspective interface that
1701 * explicitly describes the reason for whatever unwinding
1702 * operations are currently in progress, so that those modules
1703 * work reliably and $@ isn't further overloaded. But we don't
1704 * have one yet. In its absence, as a stopgap measure, ERRSV is
1705 * now *additionally* set here, before unwinding, to serve as the
1706 * (unreliable) flag that it used to.
1707 *
1708 * This behaviour is temporary, and should be removed when a
1709 * proper way to detect exceptional unwinding has been developed.
1710 * As of 2010-12, the authors of modules relying on the hack
1711 * are aware of the issue, because the modules failed on
1712 * perls 5.13.{1..7} which had late setting of $@ without this
1713 * early-setting hack.
1714 */
1715 if (!(in_eval & EVAL_KEEPERR)) {
1716 SvTEMP_off(exceptsv);
1717 sv_setsv(ERRSV, exceptsv);
1718 }
1719
5a844595
GS		 1720 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1721 && PL_curstackinfo->si_prev)
1722 {
bac4b2ad 1723 dounwind(-1);
d3acc0f7 1724 POPSTACK;
bac4b2ad 1725 }
e336de0d 1726
a0d0e21e
LW		 1727 if (cxix >= 0) {
1728 I32 optype;
b6494f15 1729 SV *namesv;
35a4481c 1730 register PERL_CONTEXT *cx;
901017d6 1731 SV **newsp;
8f89e5a9
Z		 1732 COP *oldcop;
1733 JMPENV *restartjmpenv;
1734 OP *restartop;
a0d0e21e
LW		 1735
1736 if (cxix < cxstack_ix)
1737 dounwind(cxix);
1738
3280af22 1739 POPBLOCK(cx,PL_curpm);
6b35e009 1740 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1741 STRLEN msglen;
96d9b9cd 1742 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1743 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1744 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW		 1745 my_exit(1);
1746 }
1747 POPEVAL(cx);
b6494f15 1748 namesv = cx->blk_eval.old_namesv;
8f89e5a9
Z		 1749 oldcop = cx->blk_oldcop;
1750 restartjmpenv = cx->blk_eval.cur_top_env;
1751 restartop = cx->blk_eval.retop;
a0d0e21e
LW		 1752
1753 if (gimme == G_SCALAR)
3280af22
NIS		 1754 *++newsp = &PL_sv_undef;
1755 PL_stack_sp = newsp;
a0d0e21e
LW		 1756
1757 LEAVE;
748a9306 1758
7fb6a879
GS		 1759 /* LEAVE could clobber PL_curcop (see save_re_context())
1760 * XXX it might be better to find a way to avoid messing with
1761 * PL_curcop in save_re_context() instead, but this is a more
1762 * minimal fix --GSAR */
8f89e5a9 1763 PL_curcop = oldcop;
7fb6a879 1764
7a2e2cd6 1765 if (optype == OP_REQUIRE) {
b6494f15 1766 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1767 SvPVX_const(namesv),
c60dbbc3 1768 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1769 &PL_sv_undef, 0);
27e90453
DM		 1770 /* note that unlike pp_entereval, pp_require isn't
1771 * supposed to trap errors. So now that we've popped the
1772 * EVAL that pp_require pushed, and processed the error
1773 * message, rethrow the error */
ecad31f0
BF		 1774 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1775 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1776 SVs_TEMP)));
7a2e2cd6 1777 }
c5df3096 1778 if (in_eval & EVAL_KEEPERR) {
ecad31f0
BF		 1779 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1780 SVfARG(exceptsv));
96d9b9cd
Z		 1781 }
1782 else {
1783 sv_setsv(ERRSV, exceptsv);
1784 }
8f89e5a9
Z		 1785 PL_restartjmpenv = restartjmpenv;
1786 PL_restartop = restartop;
bb4c52e0
GG		 1787 JMPENV_JUMP(3);
1788 /* NOTREACHED */
a0d0e21e
LW		 1789 }
1790 }
87582a92 1791
96d9b9cd 1792 write_to_stderr(exceptsv);
f86702cc 1793 my_failure_exit();
1794 /* NOTREACHED */
a0d0e21e
LW		 1795}
1796
1797PP(pp_xor)
1798{
97aff369 1799 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW		 1800 if (SvTRUE(left) != SvTRUE(right))
1801 RETSETYES;
1802 else
1803 RETSETNO;
1804}
1805
8dff4fc5
BM		 1806/*
1807=for apidoc caller_cx
1808
1809The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
1810returned C<PERL_CONTEXT> structure can be interrogated to find all the
1811information returned to Perl by C<caller>. Note that XSUBs don't get a
1812stack frame, so C<caller_cx(0, NULL)> will return information for the
1813immediately-surrounding Perl code.
1814
1815This function skips over the automatic calls to C<&DB::sub> made on the
1816behalf of the debugger. If the stack frame requested was a sub called by
1817C<DB::sub>, the return value will be the frame for the call to
1818C<DB::sub>, since that has the correct line number/etc. for the call
1819site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
1820frame for the sub call itself.
1821
1822=cut
1823*/
1824
1825const PERL_CONTEXT *
1826Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1827{
a0d0e21e 1828 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL		 1829 register const PERL_CONTEXT *cx;
1830 register const PERL_CONTEXT *ccstack = cxstack;
1831 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1832
a0d0e21e 1833 for (;;) {
2c375eb9
GS		 1834 /* we may be in a higher stacklevel, so dig down deeper */
1835 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1836 top_si = top_si->si_prev;
1837 ccstack = top_si->si_cxstack;
1838 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1839 }
8dff4fc5
BM		 1840 if (cxix < 0)
1841 return NULL;
f2a7f298
DG		 1842 /* caller() should not report the automatic calls to &DB::sub */
1843 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1844 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW		 1845 count++;
1846 if (!count--)
1847 break;
2c375eb9 1848 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1849 }
2c375eb9
GS		 1850
1851 cx = &ccstack[cxix];
8dff4fc5
BM		 1852 if (dbcxp) *dbcxp = cx;
1853
7766f137 1854 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1855 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1856 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1857 field below is defined for any cx. */
f2a7f298
DG		 1858 /* caller() should not report the automatic calls to &DB::sub */
1859 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1860 cx = &ccstack[dbcxix];
06a5b730 1861 }
1862
8dff4fc5
BM		 1863 return cx;
1864}
1865
1866PP(pp_caller)
1867{
1868 dVAR;
1869 dSP;
1870 register const PERL_CONTEXT *cx;
1871 const PERL_CONTEXT *dbcx;
1872 I32 gimme;
d527ce7c 1873 const HEK *stash_hek;
8dff4fc5 1874 I32 count = 0;
ce0b554b 1875 bool has_arg = MAXARG && TOPs;
8dff4fc5 1876
ce0b554b
FC		 1877 if (MAXARG) {
1878 if (has_arg)
8dff4fc5 1879 count = POPi;
ce0b554b
FC		 1880 else (void)POPs;
1881 }
8dff4fc5 1882
ce0b554b 1883 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5
BM		 1884 if (!cx) {
1885 if (GIMME != G_ARRAY) {
1886 EXTEND(SP, 1);
1887 RETPUSHUNDEF;
1888 }
1889 RETURN;
1890 }
1891
d527ce7c 1892 stash_hek = HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop));
a0d0e21e 1893 if (GIMME != G_ARRAY) {
27d41816 1894 EXTEND(SP, 1);
d527ce7c 1895 if (!stash_hek)
3280af22 1896 PUSHs(&PL_sv_undef);
49d8d3a1
MB		 1897 else {
1898 dTARGET;
d527ce7c 1899 sv_sethek(TARG, stash_hek);
49d8d3a1
MB		 1900 PUSHs(TARG);
1901 }
a0d0e21e
LW		 1902 RETURN;
1903 }
a0d0e21e 1904
b3ca2e83 1905 EXTEND(SP, 11);
27d41816 1906
d527ce7c 1907 if (!stash_hek)
3280af22 1908 PUSHs(&PL_sv_undef);
d527ce7c
BF		 1909 else {
1910 dTARGET;
1911 sv_sethek(TARG, stash_hek);
1912 PUSHTARG;
1913 }
6e449a3a
MHM		 1914 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1915 mPUSHi((I32)CopLINE(cx->blk_oldcop));
ce0b554b 1916 if (!has_arg)
a0d0e21e 1917 RETURN;
7766f137 1918 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
8dff4fc5 1919 GV * const cvgv = CvGV(dbcx->blk_sub.cv);
7766f137 1920 /* So is ccstack[dbcxix]. */
07b8c804 1921 if (isGV(cvgv)) {
561b68a9 1922 SV * const sv = newSV(0);
c445ea15 1923 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1924 mPUSHs(sv);
bf38a478 1925 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS		 1926 }
1927 else {
84bafc02 1928 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1929 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1930 }
a0d0e21e
LW		 1931 }
1932 else {
84bafc02 1933 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1934 mPUSHi(0);
a0d0e21e 1935 }
54310121 1936 gimme = (I32)cx->blk_gimme;
1937 if (gimme == G_VOID)
3280af22 1938 PUSHs(&PL_sv_undef);
54310121 1939 else
98625aca 1940 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1941 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1942 /* eval STRING */
85a64632 1943 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1944 PUSHs(cx->blk_eval.cur_text);
3280af22 1945 PUSHs(&PL_sv_no);
0f79a09d 1946 }
811a4de9 1947 /* require */
0f79a09d 1948 else if (cx->blk_eval.old_namesv) {
6e449a3a 1949 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1950 PUSHs(&PL_sv_yes);
06a5b730 1951 }
811a4de9
GS		 1952 /* eval BLOCK (try blocks have old_namesv == 0) */
1953 else {
1954 PUSHs(&PL_sv_undef);
1955 PUSHs(&PL_sv_undef);
1956 }
4633a7c4 1957 }
a682de96
GS		 1958 else {
1959 PUSHs(&PL_sv_undef);
1960 PUSHs(&PL_sv_undef);
1961 }
bafb2adc 1962 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1963 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1964 {
66a1b24b
AL		 1965 AV * const ary = cx->blk_sub.argarray;
1966 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1967
e1a80902 1968 Perl_init_dbargs(aTHX);
a0d0e21e 1969
3280af22
NIS		 1970 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1971 av_extend(PL_dbargs, AvFILLp(ary) + off);
1972 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1973 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1974 }
f3aa04c2
GS		 1975 /* XXX only hints propagated via op_private are currently
1976 * visible (others are not easily accessible, since they
1977 * use the global PL_hints) */
6e449a3a 1978 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS		 1979 {
1980 SV * mask ;
72dc9ed5 1981 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1982
ac27b0f5 1983 if (old_warnings == pWARN_NONE ||
114bafba 1984 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1985 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1986 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS		 1987 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1988 /* Get the bit mask for $warnings::Bits{all}, because
1989 * it could have been extended by warnings::register */
1990 SV **bits_all;
6673a63c 1991 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1992 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS		 1993 mask = newSVsv(*bits_all);
1994 }
1995 else {
1996 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1997 }
1998 }
e476b1b5 1999 else
72dc9ed5 2000 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 2001 mPUSHs(mask);
e476b1b5 2002 }
b3ca2e83 2003
c28fe1ec 2004 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 2005 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 2006 : &PL_sv_undef);
a0d0e21e
LW		 2007 RETURN;
2008}
2009
a0d0e21e
LW		 2010PP(pp_reset)
2011{
97aff369 2012 dVAR;
39644a26 2013 dSP;
f650fa72
FC		 2014 const char * const tmps =
2015 (MAXARG < 1 || (!TOPs && !POPs)) ? (const char *)"" : POPpconstx;
11faa288 2016 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 2017 PUSHs(&PL_sv_yes);
a0d0e21e
LW		 2018 RETURN;
2019}
2020
dd2155a4
DM		 2021/* like pp_nextstate, but used instead when the debugger is active */
2022
a0d0e21e
LW		 2023PP(pp_dbstate)
2024{
27da23d5 2025 dVAR;
533c011a 2026 PL_curcop = (COP*)PL_op;
a0d0e21e 2027 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 2028 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW		 2029 FREETMPS;
2030
f410a211
NC		 2031 PERL_ASYNC_CHECK();
2032
5df8de69
DM		 2033 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
2034 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 2035 {
39644a26 2036 dSP;
c09156bb 2037 register PERL_CONTEXT *cx;
f54cb97a 2038 const I32 gimme = G_ARRAY;
eb160463 2039 U8 hasargs;
0bd48802
AL		 2040 GV * const gv = PL_DBgv;
2041 register CV * const cv = GvCV(gv);
a0d0e21e 2042
a0d0e21e 2043 if (!cv)
cea2e8a9 2044 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 2045
aea4f609
DM		 2046 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
2047 /* don't do recursive DB::DB call */
a0d0e21e 2048 return NORMAL;
748a9306 2049
a57c6685 2050 ENTER;
4633a7c4
LW		 2051 SAVETMPS;
2052
3280af22 2053 SAVEI32(PL_debug);
55497cff 2054 SAVESTACK_POS();
3280af22 2055 PL_debug = 0;
748a9306 2056 hasargs = 0;
924508f0 2057 SPAGAIN;
748a9306 2058
aed2304a 2059 if (CvISXSUB(cv)) {
c127bd3a
SF		 2060 CvDEPTH(cv)++;
2061 PUSHMARK(SP);
2062 (void)(*CvXSUB(cv))(aTHX_ cv);
2063 CvDEPTH(cv)--;
2064 FREETMPS;
a57c6685 2065 LEAVE;
c127bd3a
SF		 2066 return NORMAL;
2067 }
2068 else {
2069 PUSHBLOCK(cx, CXt_SUB, SP);
2070 PUSHSUB_DB(cx);
2071 cx->blk_sub.retop = PL_op->op_next;
2072 CvDEPTH(cv)++;
2073 SAVECOMPPAD();
2074 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
2075 RETURNOP(CvSTART(cv));
2076 }
a0d0e21e
LW		 2077 }
2078 else
2079 return NORMAL;
2080}
2081
b9d76716
VP		 2082STATIC SV **
2083S_adjust_stack_on_leave(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme, U32 flags)
2084{
9a214eec 2085 bool padtmp = 0;
b9d76716
VP		 2086 PERL_ARGS_ASSERT_ADJUST_STACK_ON_LEAVE;
2087
9a214eec
DM		 2088 if (flags & SVs_PADTMP) {
2089 flags &= ~SVs_PADTMP;
2090 padtmp = 1;
2091 }
b9d76716
VP		 2092 if (gimme == G_SCALAR) {
2093 if (MARK < SP)
9a214eec
DM		 2094 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2095 ? *SP : sv_mortalcopy(*SP);
b9d76716
VP		 2096 else {
2097 /* MEXTEND() only updates MARK, so reuse it instead of newsp. */
2098 MARK = newsp;
2099 MEXTEND(MARK, 1);
2100 *++MARK = &PL_sv_undef;
2101 return MARK;
2102 }
2103 }
2104 else if (gimme == G_ARRAY) {
2105 /* in case LEAVE wipes old return values */
2106 while (++MARK <= SP) {
9a214eec 2107 if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
b9d76716
VP		 2108 *++newsp = *MARK;
2109 else {
2110 *++newsp = sv_mortalcopy(*MARK);
2111 TAINT_NOT; /* Each item is independent */
2112 }
2113 }
2114 /* When this function was called with MARK == newsp, we reach this
2115 * point with SP == newsp. */
2116 }
2117
2118 return newsp;
2119}
2120
2b9a6457
VP		 2121PP(pp_enter)
2122{
2123 dVAR; dSP;
2124 register PERL_CONTEXT *cx;
7c2d9d03 2125 I32 gimme = GIMME_V;
2b9a6457
VP		 2126
2127 ENTER_with_name("block");
2128
2129 SAVETMPS;
2130 PUSHBLOCK(cx, CXt_BLOCK, SP);
2131
2132 RETURN;
2133}
2134
2135PP(pp_leave)
2136{
2137 dVAR; dSP;
2138 register PERL_CONTEXT *cx;
2139 SV **newsp;
2140 PMOP *newpm;
2141 I32 gimme;
2142
2143 if (PL_op->op_flags & OPf_SPECIAL) {
2144 cx = &cxstack[cxstack_ix];
2145 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2146 }
2147
2148 POPBLOCK(cx,newpm);
2149
2150 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2151
2152 TAINT_NOT;
f02ea43c 2153 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP);
2b9a6457
VP		 2154 PL_curpm = newpm; /* Don't pop $1 et al till now */
2155
2156 LEAVE_with_name("block");
2157
2158 RETURN;
2159}
2160
a0d0e21e
LW		 2161PP(pp_enteriter)
2162{
27da23d5 2163 dVAR; dSP; dMARK;
c09156bb 2164 register PERL_CONTEXT *cx;
f54cb97a 2165 const I32 gimme = GIMME_V;
df530c37 2166 void *itervar; /* location of the iteration variable */
840fe433 2167 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2168
d343c3ef 2169 ENTER_with_name("loop1");
4633a7c4
LW		 2170 SAVETMPS;
2171
aafca525
DM		 2172 if (PL_op->op_targ) { /* "my" variable */
2173 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM		 2174 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2175 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2176 SVs_PADSTALE, SVs_PADSTALE);
2177 }
09edbca0 2178 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
89e00a7c 2179#ifdef USE_ITHREADS
df530c37 2180 itervar = PL_comppad;
89e00a7c 2181#else
aafca525 2182 itervar = &PAD_SVl(PL_op->op_targ);
7766f137 2183#endif
54b9620d 2184 }
aafca525 2185 else { /* symbol table variable */
159b6efe 2186 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM		 2187 SV** svp = &GvSV(gv);
2188 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2189 *svp = newSV(0);
df530c37 2190 itervar = (void *)gv;
54b9620d 2191 }
4633a7c4 2192
0d863452
RH		 2193 if (PL_op->op_private & OPpITER_DEF)
2194 cxtype |= CXp_FOR_DEF;
2195
d343c3ef 2196 ENTER_with_name("loop2");
a0d0e21e 2197
7766f137 2198 PUSHBLOCK(cx, cxtype, SP);
df530c37 2199 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2200 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS		 2201 SV *maybe_ary = POPs;
2202 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2203 dPOPss;
d01136d6 2204 SV * const right = maybe_ary;
984a4bea
RD		 2205 SvGETMAGIC(sv);
2206 SvGETMAGIC(right);
4fe3f0fa 2207 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2208 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC		 2209 cx->cx_type |= CXt_LOOP_LAZYIV;
2210 /* Make sure that no-one re-orders cop.h and breaks our
2211 assumptions */
2212 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040 2213#ifdef NV_PRESERVES_UV
f52e41ad
FC		 2214 if ((SvOK(sv) && ((SvNV_nomg(sv) < (NV)IV_MIN) ||
2215 (SvNV_nomg(sv) > (NV)IV_MAX)))
a2309040 2216 ||
f52e41ad
FC		 2217 (SvOK(right) && ((SvNV_nomg(right) > (NV)IV_MAX) ||
2218 (SvNV_nomg(right) < (NV)IV_MIN))))
a2309040 2219#else
f52e41ad 2220 if ((SvOK(sv) && ((SvNV_nomg(sv) <= (NV)IV_MIN)
a2309040 2221 ||
f52e41ad
FC		 2222 ((SvNV_nomg(sv) > 0) &&
2223 ((SvUV_nomg(sv) > (UV)IV_MAX) ||
2224 (SvNV_nomg(sv) > (NV)UV_MAX)))))
a2309040 2225 ||
f52e41ad 2226 (SvOK(right) && ((SvNV_nomg(right) <= (NV)IV_MIN)
a2309040 2227 ||
f52e41ad
FC		 2228 ((SvNV_nomg(right) > 0) &&
2229 ((SvUV_nomg(right) > (UV)IV_MAX) ||
2230 (SvNV_nomg(right) > (NV)UV_MAX))
2231 ))))
a2309040 2232#endif
076d9a11 2233 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC		 2234 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2235 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM		 2236#ifdef DEBUGGING
2237 /* for correct -Dstv display */
2238 cx->blk_oldsp = sp - PL_stack_base;
2239#endif
89ea2908 2240 }
3f63a782 2241 else {
d01136d6
BS		 2242 cx->cx_type &= ~CXTYPEMASK;
2243 cx->cx_type |= CXt_LOOP_LAZYSV;
2244 /* Make sure that no-one re-orders cop.h and breaks our
2245 assumptions */
2246 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2247 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2248 cx->blk_loop.state_u.lazysv.end = right;
2249 SvREFCNT_inc(right);
2250 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC		 2251 /* This will do the upgrade to SVt_PV, and warn if the value
2252 is uninitialised. */
10516c54 2253 (void) SvPV_nolen_const(right);
267cc4a8
NC		 2254 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2255 to replace !SvOK() with a pointer to "". */
2256 if (!SvOK(right)) {
2257 SvREFCNT_dec(right);
d01136d6 2258 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2259 }
3f63a782 2260 }
89ea2908 2261 }
d01136d6 2262 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2263 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS		 2264 SvREFCNT_inc(maybe_ary);
2265 cx->blk_loop.state_u.ary.ix =
2266 (PL_op->op_private & OPpITER_REVERSED) ?
2267 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2268 -1;
ef3e5ea9 2269 }
89ea2908 2270 }
d01136d6
BS		 2271 else { /* iterating over items on the stack */
2272 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2273 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2274 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC		 2275 }
2276 else {
d01136d6 2277 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2278 }
4633a7c4 2279 }
a0d0e21e
LW		 2280
2281 RETURN;
2282}
2283
2284PP(pp_enterloop)
2285{
27da23d5 2286 dVAR; dSP;
c09156bb 2287 register PERL_CONTEXT *cx;
f54cb97a 2288 const I32 gimme = GIMME_V;
a0d0e21e 2289
d343c3ef 2290 ENTER_with_name("loop1");
a0d0e21e 2291 SAVETMPS;
d343c3ef 2292 ENTER_with_name("loop2");
a0d0e21e 2293
3b719c58
NC		 2294 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2295 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW		 2296
2297 RETURN;
2298}
2299
2300PP(pp_leaveloop)
2301{
27da23d5 2302 dVAR; dSP;
c09156bb 2303 register PERL_CONTEXT *cx;
a0d0e21e
LW		 2304 I32 gimme;
2305 SV **newsp;
2306 PMOP *newpm;
2307 SV **mark;
2308
2309 POPBLOCK(cx,newpm);
3b719c58 2310 assert(CxTYPE_is_LOOP(cx));
4fdae800 2311 mark = newsp;
a8bba7fa 2312 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2313
a1f49e72 2314 TAINT_NOT;
b9d76716 2315 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme, 0);
f86702cc 2316 PUTBACK;
2317
a8bba7fa 2318 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2319 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2320
d343c3ef
GG		 2321 LEAVE_with_name("loop2");
2322 LEAVE_with_name("loop1");
a0d0e21e 2323
f86702cc 2324 return NORMAL;
a0d0e21e
LW		 2325}
2326
3bdf583b
FC		 2327STATIC void
2328S_return_lvalues(pTHX_ SV **mark, SV **sp, SV **newsp, I32 gimme,
d25b0d7b 2329 PERL_CONTEXT *cx, PMOP *newpm)
3bdf583b 2330{
80422e24 2331 const bool ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2332 if (gimme == G_SCALAR) {
d25b0d7b
FC		 2333 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2334 SV *sv;
001de122 2335 const char *what = NULL;
d25b0d7b
FC		 2336 if (MARK < SP) {
2337 assert(MARK+1 == SP);
2338 if ((SvPADTMP(TOPs) ||
2339 (SvFLAGS(TOPs) & (SVf_READONLY | SVf_FAKE))
2340 == SVf_READONLY
2341 ) &&
2342 !SvSMAGICAL(TOPs)) {
001de122 2343 what =
d25b0d7b 2344 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2345 : "a readonly value" : "a temporary";
d25b0d7b 2346 }
001de122 2347 else goto copy_sv;
d25b0d7b
FC		 2348 }
2349 else {
2350 /* sub:lvalue{} will take us here. */
001de122 2351 what = "undef";
d25b0d7b 2352 }
001de122
FC		 2353 LEAVE;
2354 cxstack_ix--;
2355 POPSUB(cx,sv);
2356 PL_curpm = newpm;
2357 LEAVESUB(sv);
2358 Perl_croak(aTHX_
2359 "Can't return %s from lvalue subroutine", what
2360 );
d25b0d7b 2361 }
93905212 2362 if (MARK < SP) {
a5ad7a5a 2363 copy_sv:
3bdf583b
FC		 2364 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
2365 *++newsp = SvREFCNT_inc(*SP);
2366 FREETMPS;
2367 sv_2mortal(*newsp);
2368 }
2369 else
e08be60b 2370 *++newsp =
e08be60b
FC		 2371 !SvTEMP(*SP)
2372 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2373 : *SP;
3bdf583b 2374 }
0d235c77
FC		 2375 else {
2376 EXTEND(newsp,1);
3bdf583b 2377 *++newsp = &PL_sv_undef;
0d235c77 2378 }
0e9700df 2379 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC		 2380 SvGETMAGIC(TOPs);
2381 if (!SvOK(TOPs)) {
0e9700df 2382 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC		 2383 }
2384 }
3bdf583b
FC		 2385 }
2386 else if (gimme == G_ARRAY) {
0e9700df 2387 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2388 if (ref || !CxLVAL(cx))
e08be60b
FC		 2389 while (++MARK <= SP)
2390 *++newsp =
2391 SvTEMP(*MARK)
2392 ? *MARK
80422e24
FC		 2393 : ref && SvFLAGS(*MARK) & SVs_PADTMP
2394 ? sv_mortalcopy(*MARK)
2395 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e08be60b 2396 else while (++MARK <= SP) {
d25b0d7b
FC		 2397 if (*MARK != &PL_sv_undef
2398 && (SvPADTMP(*MARK)
2399 || (SvFLAGS(*MARK) & (SVf_READONLY|SVf_FAKE))
2400 == SVf_READONLY
2401 )
2402 ) {
2403 SV *sv;
2404 /* Might be flattened array after $#array = */
2405 PUTBACK;
2406 LEAVE;
2407 cxstack_ix--;
2408 POPSUB(cx,sv);
2409 PL_curpm = newpm;
2410 LEAVESUB(sv);
2411 Perl_croak(aTHX_
2412 "Can't return a %s from lvalue subroutine",
2413 SvREADONLY(TOPs) ? "readonly value" : "temporary");
2414 }
2415 else
4bee03f8
FC		 2416 *++newsp =
2417 SvTEMP(*MARK)
2418 ? *MARK
2419 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC		 2420 }
2421 }
2422 PL_stack_sp = newsp;
2423}
2424
a0d0e21e
LW		 2425PP(pp_return)
2426{
27da23d5 2427 dVAR; dSP; dMARK;
c09156bb 2428 register PERL_CONTEXT *cx;
f86702cc 2429 bool popsub2 = FALSE;
b45de488 2430 bool clear_errsv = FALSE;
fa1e92c4 2431 bool lval = FALSE;
a0d0e21e
LW		 2432 I32 gimme;
2433 SV **newsp;
2434 PMOP *newpm;
2435 I32 optype = 0;
b6494f15 2436 SV *namesv;
b0d9ce38 2437 SV *sv;
b263a1ad 2438 OP *retop = NULL;
a0d0e21e 2439
0bd48802
AL		 2440 const I32 cxix = dopoptosub(cxstack_ix);
2441
9850bf21
RH		 2442 if (cxix < 0) {
2443 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2444 * sort block, which is a CXt_NULL
2445 * not a CXt_SUB */
2446 dounwind(0);
d7507f74
RH		 2447 PL_stack_base[1] = *PL_stack_sp;
2448 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW		 2449 return 0;
2450 }
9850bf21
RH		 2451 else
2452 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2453 }
a0d0e21e
LW		 2454 if (cxix < cxstack_ix)
2455 dounwind(cxix);
2456
d7507f74
RH		 2457 if (CxMULTICALL(&cxstack[cxix])) {
2458 gimme = cxstack[cxix].blk_gimme;
2459 if (gimme == G_VOID)
2460 PL_stack_sp = PL_stack_base;
2461 else if (gimme == G_SCALAR) {
2462 PL_stack_base[1] = *PL_stack_sp;
2463 PL_stack_sp = PL_stack_base + 1;
2464 }
9850bf21 2465 return 0;
d7507f74 2466 }
9850bf21 2467
a0d0e21e 2468 POPBLOCK(cx,newpm);
6b35e009 2469 switch (CxTYPE(cx)) {
a0d0e21e 2470 case CXt_SUB:
f86702cc 2471 popsub2 = TRUE;
fa1e92c4 2472 lval = !!CvLVALUE(cx->blk_sub.cv);
f39bc417 2473 retop = cx->blk_sub.retop;
5dd42e15 2474 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW		 2475 break;
2476 case CXt_EVAL:
b45de488
GS		 2477 if (!(PL_in_eval & EVAL_KEEPERR))
2478 clear_errsv = TRUE;
a0d0e21e 2479 POPEVAL(cx);
b6494f15 2480 namesv = cx->blk_eval.old_namesv;
f39bc417 2481 retop = cx->blk_eval.retop;
1d76a5c3
GS		 2482 if (CxTRYBLOCK(cx))
2483 break;
748a9306
LW		 2484 if (optype == OP_REQUIRE &&
2485 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2486 {
54310121 2487 /* Unassume the success we assumed earlier. */
b6494f15 2488 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 2489 SvPVX_const(namesv),
c60dbbc3 2490 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15
VP		 2491 G_DISCARD);
2492 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
748a9306 2493 }
a0d0e21e 2494 break;
7766f137
GS		 2495 case CXt_FORMAT:
2496 POPFORMAT(cx);
f39bc417 2497 retop = cx->blk_sub.retop;
7766f137 2498 break;
a0d0e21e 2499 default:
cea2e8a9 2500 DIE(aTHX_ "panic: return");
a0d0e21e
LW		 2501 }
2502
a1f49e72 2503 TAINT_NOT;
d25b0d7b 2504 if (lval) S_return_lvalues(aTHX_ MARK, SP, newsp, gimme, cx, newpm);
3bdf583b
FC		 2505 else {
2506 if (gimme == G_SCALAR) {
a29cdaf0
IZ		 2507 if (MARK < SP) {
2508 if (popsub2) {
a8bba7fa 2509 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
3ed94dc0 2510 if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1) {
a29cdaf0
IZ		 2511 *++newsp = SvREFCNT_inc(*SP);
2512 FREETMPS;
2513 sv_2mortal(*newsp);
959e3673
GS		 2514 }
2515 else {
2516 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2517 FREETMPS;
959e3673
GS		 2518 *++newsp = sv_mortalcopy(sv);
2519 SvREFCNT_dec(sv);
a29cdaf0 2520 }
959e3673 2521 }
3ed94dc0 2522 else if (SvTEMP(*SP) && SvREFCNT(*SP) == 1) {
767eda44 2523 *++newsp = *SP;
767eda44 2524 }
959e3673 2525 else
767eda44 2526 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2527 }
2528 else
a29cdaf0 2529 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2530 }
2531 else
3280af22 2532 *++newsp = &PL_sv_undef;
3bdf583b
FC		 2533 }
2534 else if (gimme == G_ARRAY) {
a1f49e72 2535 while (++MARK <= SP) {
3ed94dc0 2536 *++newsp = popsub2 && SvTEMP(*MARK) && SvREFCNT(*MARK) == 1
f86702cc 2537 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2538 TAINT_NOT; /* Each item is independent */
2539 }
3bdf583b
FC		 2540 }
2541 PL_stack_sp = newsp;
a0d0e21e 2542 }
a0d0e21e 2543
5dd42e15 2544 LEAVE;
f86702cc 2545 /* Stack values are safe: */
2546 if (popsub2) {
5dd42e15 2547 cxstack_ix--;
b0d9ce38 2548 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2549 }
b0d9ce38 2550 else
c445ea15 2551 sv = NULL;
3280af22 2552 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2553
b0d9ce38 2554 LEAVESUB(sv);
8433848b 2555 if (clear_errsv) {
ab69dbc2 2556 CLEAR_ERRSV();
8433848b 2557 }
f39bc417 2558 return retop;
a0d0e21e
LW		 2559}
2560
4f443c3d
FC		 2561/* This duplicates parts of pp_leavesub, so that it can share code with
2562 * pp_return */
2563PP(pp_leavesublv)
2564{
2565 dVAR; dSP;
4f443c3d
FC		 2566 SV **newsp;
2567 PMOP *newpm;
2568 I32 gimme;
2569 register PERL_CONTEXT *cx;
2570 SV *sv;
2571
2572 if (CxMULTICALL(&cxstack[cxstack_ix]))
2573 return 0;
2574
2575 POPBLOCK(cx,newpm);
2576 cxstack_ix++; /* temporarily protect top context */
4f443c3d
FC		 2577
2578 TAINT_NOT;
2579
0d235c77 2580 S_return_lvalues(aTHX_ newsp, SP, newsp, gimme, cx, newpm);
4f443c3d
FC		 2581
2582 LEAVE;
2583 cxstack_ix--;
2584 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
2585 PL_curpm = newpm; /* ... and pop $1 et al */
2586
2587 LEAVESUB(sv);
2588 return cx->blk_sub.retop;
2589}
2590
a0d0e21e
LW		 2591PP(pp_last)
2592{
27da23d5 2593 dVAR; dSP;
a0d0e21e 2594 I32 cxix;
c09156bb 2595 register PERL_CONTEXT *cx;
f86702cc 2596 I32 pop2 = 0;
a0d0e21e 2597 I32 gimme;
8772537c 2598 I32 optype;
b263a1ad 2599 OP *nextop = NULL;
a0d0e21e
LW		 2600 SV **newsp;
2601 PMOP *newpm;
a8bba7fa 2602 SV **mark;
c445ea15 2603 SV *sv = NULL;
9d4ba2ae 2604
a0d0e21e 2605
533c011a 2606 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2607 cxix = dopoptoloop(cxstack_ix);
2608 if (cxix < 0)
a651a37d 2609 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW		 2610 }
2611 else {
2612 cxix = dopoptolabel(cPVOP->op_pv);
2613 if (cxix < 0)
cea2e8a9 2614 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2615 }
2616 if (cxix < cxstack_ix)
2617 dounwind(cxix);
2618
2619 POPBLOCK(cx,newpm);
5dd42e15 2620 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2621 mark = newsp;
6b35e009 2622 switch (CxTYPE(cx)) {
c6fdafd0 2623 case CXt_LOOP_LAZYIV:
d01136d6 2624 case CXt_LOOP_LAZYSV:
3b719c58
NC		 2625 case CXt_LOOP_FOR:
2626 case CXt_LOOP_PLAIN:
2627 pop2 = CxTYPE(cx);
a8bba7fa 2628 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2629 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2630 break;
f86702cc 2631 case CXt_SUB:
f86702cc 2632 pop2 = CXt_SUB;
f39bc417 2633 nextop = cx->blk_sub.retop;
a0d0e21e 2634 break;
f86702cc 2635 case CXt_EVAL:
2636 POPEVAL(cx);
f39bc417 2637 nextop = cx->blk_eval.retop;
a0d0e21e 2638 break;
7766f137
GS		 2639 case CXt_FORMAT:
2640 POPFORMAT(cx);
f39bc417 2641 nextop = cx->blk_sub.retop;
7766f137 2642 break;
a0d0e21e 2643 default:
cea2e8a9 2644 DIE(aTHX_ "panic: last");
a0d0e21e
LW		 2645 }
2646
a1f49e72 2647 TAINT_NOT;
b9d76716
VP		 2648 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme,
2649 pop2 == CXt_SUB ? SVs_TEMP : 0);
f86702cc 2650 PUTBACK;
2651
5dd42e15
DM		 2652 LEAVE;
2653 cxstack_ix--;
f86702cc 2654 /* Stack values are safe: */
2655 switch (pop2) {
c6fdafd0 2656 case CXt_LOOP_LAZYIV:
3b719c58 2657 case CXt_LOOP_PLAIN:
d01136d6 2658 case CXt_LOOP_LAZYSV:
3b719c58 2659 case CXt_LOOP_FOR:
a8bba7fa 2660 POPLOOP(cx); /* release loop vars ... */
4fdae800 2661 LEAVE;
f86702cc 2662 break;
2663 case CXt_SUB:
b0d9ce38 2664 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2665 break;
a0d0e21e 2666 }
3280af22 2667 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2668
b0d9ce38 2669 LEAVESUB(sv);
9d4ba2ae
AL		 2670 PERL_UNUSED_VAR(optype);
2671 PERL_UNUSED_VAR(gimme);
f86702cc 2672 return nextop;
a0d0e21e
LW		 2673}
2674
2675PP(pp_next)
2676{
27da23d5 2677 dVAR;
a0d0e21e 2678 I32 cxix;
c09156bb 2679 register PERL_CONTEXT *cx;
85538317 2680 I32 inner;
a0d0e21e 2681
533c011a 2682 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2683 cxix = dopoptoloop(cxstack_ix);
2684 if (cxix < 0)
a651a37d 2685 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW		 2686 }
2687 else {
2688 cxix = dopoptolabel(cPVOP->op_pv);
2689 if (cxix < 0)
cea2e8a9 2690 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2691 }
2692 if (cxix < cxstack_ix)
2693 dounwind(cxix);
2694
85538317
GS		 2695 /* clear off anything above the scope we're re-entering, but
2696 * save the rest until after a possible continue block */
2697 inner = PL_scopestack_ix;
1ba6ee2b 2698 TOPBLOCK(cx);
85538317
GS		 2699 if (PL_scopestack_ix < inner)
2700 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2701 PL_curcop = cx->blk_oldcop;
d57ce4df 2702 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW		 2703}
2704
2705PP(pp_redo)
2706{
27da23d5 2707 dVAR;
a0d0e21e 2708 I32 cxix;
c09156bb 2709 register PERL_CONTEXT *cx;
a0d0e21e 2710 I32 oldsave;
a034e688 2711 OP* redo_op;
a0d0e21e 2712
533c011a 2713 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2714 cxix = dopoptoloop(cxstack_ix);
2715 if (cxix < 0)
a651a37d 2716 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW		 2717 }
2718 else {
2719 cxix = dopoptolabel(cPVOP->op_pv);
2720 if (cxix < 0)
cea2e8a9 2721 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2722 }
2723 if (cxix < cxstack_ix)
2724 dounwind(cxix);
2725
022eaa24 2726 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM		 2727 if (redo_op->op_type == OP_ENTER) {
2728 /* pop one less context to avoid $x being freed in while (my $x..) */
2729 cxstack_ix++;
2730 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2731 redo_op = redo_op->op_next;
2732 }
2733
a0d0e21e 2734 TOPBLOCK(cx);
3280af22 2735 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2736 LEAVE_SCOPE(oldsave);
936c78b5 2737 FREETMPS;
3a1b2b9e 2738 PL_curcop = cx->blk_oldcop;
a034e688 2739 return redo_op;
a0d0e21e
LW		 2740}
2741
0824fdcb 2742STATIC OP *
bfed75c6 2743S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2744{
97aff369 2745 dVAR;
a0d0e21e 2746 OP **ops = opstack;
bfed75c6 2747 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2748
7918f24d
NC		 2749 PERL_ARGS_ASSERT_DOFINDLABEL;
2750
fc36a67e 2751 if (ops >= oplimit)
cea2e8a9 2752 Perl_croak(aTHX_ too_deep);
11343788
MB		 2753 if (o->op_type == OP_LEAVE ||
2754 o->op_type == OP_SCOPE ||
2755 o->op_type == OP_LEAVELOOP ||
33d34e4c 2756 o->op_type == OP_LEAVESUB ||
11343788 2757 o->op_type == OP_LEAVETRY)
fc36a67e 2758 {
5dc0d613 2759 *ops++ = cUNOPo->op_first;
fc36a67e 2760 if (ops >= oplimit)
cea2e8a9 2761 Perl_croak(aTHX_ too_deep);
fc36a67e 2762 }
c4aa4e48 2763 *ops = 0;
11343788 2764 if (o->op_flags & OPf_KIDS) {
aec46f14 2765 OP *kid;
a0d0e21e 2766 /* First try all the kids at this level, since that's likeliest. */
11343788 2767 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac
AD		 2768 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2769 const char *kid_label = CopLABEL(kCOP);
2770 if (kid_label && strEQ(kid_label, label))
2771 return kid;
2772 }
a0d0e21e 2773 }
11343788 2774 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2775 if (kid == PL_lastgotoprobe)
a0d0e21e 2776 continue;
ed8d0fe2
SM		 2777 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2778 if (ops == opstack)
2779 *ops++ = kid;
2780 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2781 ops[-1]->op_type == OP_DBSTATE)
2782 ops[-1] = kid;
2783 else
2784 *ops++ = kid;
2785 }
155aba94 2786 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2787 return o;
a0d0e21e
LW		 2788 }
2789 }
c4aa4e48 2790 *ops = 0;
a0d0e21e
LW		 2791 return 0;
2792}
2793
a0d0e21e
LW		 2794PP(pp_goto)
2795{
27da23d5 2796 dVAR; dSP;
cbbf8932 2797 OP *retop = NULL;
a0d0e21e 2798 I32 ix;
c09156bb 2799 register PERL_CONTEXT *cx;
fc36a67e 2800#define GOTO_DEPTH 64
2801 OP *enterops[GOTO_DEPTH];
cbbf8932 2802 const char *label = NULL;
bfed75c6
AL		 2803 const bool do_dump = (PL_op->op_type == OP_DUMP);
2804 static const char must_have_label[] = "goto must have label";
a0d0e21e 2805
533c011a 2806 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2807 SV * const sv = POPs;
a0d0e21e
LW		 2808
2809 /* This egregious kludge implements goto &subroutine */
2810 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2811 I32 cxix;
c09156bb 2812 register PERL_CONTEXT *cx;
ea726b52 2813 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW		 2814 SV** mark;
2815 I32 items = 0;
2816 I32 oldsave;
b1464ded 2817 bool reified = 0;
a0d0e21e 2818
e8f7dd13 2819 retry:
4aa0a1f7 2820 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2821 const GV * const gv = CvGV(cv);
e8f7dd13 2822 if (gv) {
7fc63493 2823 GV *autogv;
e8f7dd13
GS		 2824 SV *tmpstr;
2825 /* autoloaded stub? */
2826 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2827 goto retry;
c271df94
BF		 2828 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2829 GvNAMELEN(gv),
2830 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS		 2831 if (autogv && (cv = GvCV(autogv)))
2832 goto retry;
2833 tmpstr = sv_newmortal();
c445ea15 2834 gv_efullname3(tmpstr, gv, NULL);
be2597df 2835 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2836 }
cea2e8a9 2837 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD		 2838 }
2839
a0d0e21e 2840 /* First do some returnish stuff. */
b37c2d43 2841 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2842 FREETMPS;
a0d0e21e
LW		 2843 cxix = dopoptosub(cxstack_ix);
2844 if (cxix < 0)
cea2e8a9 2845 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW		 2846 if (cxix < cxstack_ix)
2847 dounwind(cxix);
2848 TOPBLOCK(cx);
2d43a17f 2849 SPAGAIN;
564abe23 2850 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2851 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM		 2852 if (CxREALEVAL(cx))
2853 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2854 else
2855 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2856 }
9850bf21
RH		 2857 else if (CxMULTICALL(cx))
2858 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2859 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2860 /* put @_ back onto stack */
a0d0e21e 2861 AV* av = cx->blk_sub.argarray;
bfed75c6 2862
93965878 2863 items = AvFILLp(av) + 1;
a45cdc79
DM		 2864 EXTEND(SP, items+1); /* @_ could have been extended. */
2865 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS		 2866 SvREFCNT_dec(GvAV(PL_defgv));
2867 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2868 CLEAR_ARGARRAY(av);
d8b46c1b 2869 /* abandon @_ if it got reified */
62b1ebc2 2870 if (AvREAL(av)) {
b1464ded
DM		 2871 reified = 1;
2872 SvREFCNT_dec(av);
d8b46c1b
GS		 2873 av = newAV();
2874 av_extend(av, items-1);
11ca45c0 2875 AvREIFY_only(av);
ad64d0ec 2876 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2877 }
a0d0e21e 2878 }
aed2304a 2879 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2880 AV* const av = GvAV(PL_defgv);
1fa4e549 2881 items = AvFILLp(av) + 1;
a45cdc79
DM		 2882 EXTEND(SP, items+1); /* @_ could have been extended. */
2883 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2884 }
a45cdc79
DM		 2885 mark = SP;
2886 SP += items;
6b35e009 2887 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2888 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2889 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2890 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW		 2891 LEAVE_SCOPE(oldsave);
2892
2893 /* Now do some callish stuff. */
2894 SAVETMPS;
5023d17a 2895 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2896 if (CvISXSUB(cv)) {
b37c2d43 2897 OP* const retop = cx->blk_sub.retop;
9410e98d
RB		 2898 SV **newsp __attribute__unused__;
2899 I32 gimme __attribute__unused__;
b1464ded
DM		 2900 if (reified) {
2901 I32 index;
2902 for (index=0; index<items; index++)
2903 sv_2mortal(SP[-index]);
2904 }
1fa4e549 2905
b37c2d43
AL		 2906 /* XS subs don't have a CxSUB, so pop it */
2907 POPBLOCK(cx, PL_curpm);
2908 /* Push a mark for the start of arglist */
2909 PUSHMARK(mark);
2910 PUTBACK;
2911 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2912 LEAVE;
5eff7df7 2913 return retop;
a0d0e21e
LW		 2914 }
2915 else {
b37c2d43 2916 AV* const padlist = CvPADLIST(cv);
6b35e009 2917 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2918 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2919 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2920 cx->cx_type = CXt_SUB;
b150fb22 2921 }
a0d0e21e 2922 cx->blk_sub.cv = cv;
1a5b3db4 2923 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2924
a0d0e21e
LW		 2925 CvDEPTH(cv)++;
2926 if (CvDEPTH(cv) < 2)
74c765eb 2927 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2928 else {
2b9dff67 2929 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2930 sub_crush_depth(cv);
26019298 2931 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2932 }
426a09cd 2933 PL_curcop = cx->blk_oldcop;
fd617465
DM		 2934 SAVECOMPPAD();
2935 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2936 if (CxHASARGS(cx))
6d4ff0d2 2937 {
502c6561 2938 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2939
3280af22 2940 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2941 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2942 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2943 cx->blk_sub.argarray = av;
a0d0e21e
LW		 2944
2945 if (items >= AvMAX(av) + 1) {
b37c2d43 2946 SV **ary = AvALLOC(av);
a0d0e21e
LW		 2947 if (AvARRAY(av) != ary) {
2948 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2949 AvARRAY(av) = ary;
a0d0e21e
LW		 2950 }
2951 if (items >= AvMAX(av) + 1) {
2952 AvMAX(av) = items - 1;
2953 Renew(ary,items+1,SV*);
2954 AvALLOC(av) = ary;
9c6bc640 2955 AvARRAY(av) = ary;
a0d0e21e
LW		 2956 }
2957 }
a45cdc79 2958 ++mark;
a0d0e21e 2959 Copy(mark,AvARRAY(av),items,SV*);
93965878 2960 AvFILLp(av) = items - 1;
d8b46c1b 2961 assert(!AvREAL(av));
b1464ded
DM		 2962 if (reified) {
2963 /* transfer 'ownership' of refcnts to new @_ */
2964 AvREAL_on(av);
2965 AvREIFY_off(av);
2966 }
a0d0e21e
LW		 2967 while (items--) {
2968 if (*mark)
2969 SvTEMP_off(*mark);
2970 mark++;
2971 }
2972 }
491527d0 2973 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2974 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2975 if (PERLDB_GOTO) {
b96d8cd9 2976 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL		 2977 if (gotocv) {
2978 PUSHMARK( PL_stack_sp );
ad64d0ec 2979 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL		 2980 PL_stack_sp--;
2981 }
491527d0 2982 }
1ce6579f 2983 }
a0d0e21e
LW		 2984 RETURNOP(CvSTART(cv));
2985 }
2986 }
1614b0e3 2987 else {
0510663f 2988 label = SvPV_nolen_const(sv);
1614b0e3 2989 if (!(do_dump || *label))
cea2e8a9 2990 DIE(aTHX_ must_have_label);
1614b0e3 2991 }
a0d0e21e 2992 }
533c011a 2993 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2994 if (! do_dump)
cea2e8a9 2995 DIE(aTHX_ must_have_label);
a0d0e21e
LW		 2996 }
2997 else
2998 label = cPVOP->op_pv;
2999
f410a211
NC		 3000 PERL_ASYNC_CHECK();
3001
a0d0e21e 3002 if (label && *label) {
cbbf8932 3003 OP *gotoprobe = NULL;
3b2447bc 3004 bool leaving_eval = FALSE;
33d34e4c 3005 bool in_block = FALSE;
cbbf8932 3006 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW		 3007
3008 /* find label */
3009
d4c19fe8 3010 PL_lastgotoprobe = NULL;
a0d0e21e
LW		 3011 *enterops = 0;
3012 for (ix = cxstack_ix; ix >= 0; ix--) {
3013 cx = &cxstack[ix];
6b35e009 3014 switch (CxTYPE(cx)) {
a0d0e21e 3015 case CXt_EVAL:
3b2447bc 3016 leaving_eval = TRUE;
971ecbe6 3017 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH		 3018 gotoprobe = (last_eval_cx ?
3019 last_eval_cx->blk_eval.old_eval_root :
3020 PL_eval_root);
3021 last_eval_cx = cx;
9c5794fe
RH		 3022 break;
3023 }
3024 /* else fall through */
c6fdafd0 3025 case CXt_LOOP_LAZYIV:
d01136d6 3026 case CXt_LOOP_LAZYSV:
3b719c58
NC		 3027 case CXt_LOOP_FOR:
3028 case CXt_LOOP_PLAIN:
bb5aedc1
VP		 3029 case CXt_GIVEN:
3030 case CXt_WHEN:
a0d0e21e
LW		 3031 gotoprobe = cx->blk_oldcop->op_sibling;
3032 break;
3033 case CXt_SUBST:
3034 continue;
3035 case CXt_BLOCK:
33d34e4c 3036 if (ix) {
a0d0e21e 3037 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE		 3038 in_block = TRUE;
3039 } else
3280af22 3040 gotoprobe = PL_main_root;
a0d0e21e 3041 break;
b3933176 3042 case CXt_SUB:
9850bf21 3043 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS		 3044 gotoprobe = CvROOT(cx->blk_sub.cv);
3045 break;
3046 }
3047 /* FALL THROUGH */
7766f137 3048 case CXt_FORMAT:
0a753a76 3049 case CXt_NULL:
a651a37d 3050 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW		 3051 default:
3052 if (ix)
cea2e8a9 3053 DIE(aTHX_ "panic: goto");
3280af22 3054 gotoprobe = PL_main_root;
a0d0e21e
LW		 3055 break;
3056 }
2b597662
GS		 3057 if (gotoprobe) {
3058 retop = dofindlabel(gotoprobe, label,
3059 enterops, enterops + GOTO_DEPTH);
3060 if (retop)
3061 break;
eae48c89
Z		 3062 if (gotoprobe->op_sibling &&
3063 gotoprobe->op_sibling->op_type == OP_UNSTACK &&
3064 gotoprobe->op_sibling->op_sibling) {
3065 retop = dofindlabel(gotoprobe->op_sibling->op_sibling,
3066 label, enterops, enterops + GOTO_DEPTH);
3067 if (retop)
3068 break;
3069 }
2b597662 3070 }
3280af22 3071 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW		 3072 }
3073 if (!retop)
cea2e8a9 3074 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 3075
3b2447bc
RH		 3076 /* if we're leaving an eval, check before we pop any frames
3077 that we're not going to punt, otherwise the error
3078 won't be caught */
3079
3080 if (leaving_eval && *enterops && enterops[1]) {
3081 I32 i;
3082 for (i = 1; enterops[i]; i++)
3083 if (enterops[i]->op_type == OP_ENTERITER)
3084 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
3085 }
3086
b500e03b
GG		 3087 if (*enterops && enterops[1]) {
3088 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3089 if (enterops[i])
3090 deprecate("\"goto\" to jump into a construct");
3091 }
3092
a0d0e21e
LW		 3093 /* pop unwanted frames */
3094
3095 if (ix < cxstack_ix) {
3096 I32 oldsave;
3097
3098 if (ix < 0)
3099 ix = 0;
3100 dounwind(ix);
3101 TOPBLOCK(cx);
3280af22 3102 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW		 3103 LEAVE_SCOPE(oldsave);
3104 }
3105
3106 /* push wanted frames */
3107
748a9306 3108 if (*enterops && enterops[1]) {
0bd48802 3109 OP * const oldop = PL_op;
33d34e4c
AE		 3110 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3111 for (; enterops[ix]; ix++) {
533c011a 3112 PL_op = enterops[ix];
84902520
TB		 3113 /* Eventually we may want to stack the needed arguments
3114 * for each op. For now, we punt on the hard ones. */
533c011a 3115 if (PL_op->op_type == OP_ENTERITER)
894356b3 3116 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3117 PL_op->op_ppaddr(aTHX);
a0d0e21e 3118 }
533c011a 3119 PL_op = oldop;
a0d0e21e
LW		 3120 }
3121 }
3122
3123 if (do_dump) {
a5f75d66 3124#ifdef VMS
6b88bc9c 3125 if (!retop) retop = PL_main_start;
a5f75d66 3126#endif
3280af22
NIS		 3127 PL_restartop = retop;
3128 PL_do_undump = TRUE;
a0d0e21e
LW		 3129
3130 my_unexec();
3131
3280af22
NIS		 3132 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3133 PL_do_undump = FALSE;
a0d0e21e
LW		 3134 }
3135
3136 RETURNOP(retop);
3137}
3138
3139PP(pp_exit)
3140{
97aff369 3141 dVAR;
39644a26 3142 dSP;
a0d0e21e
LW		 3143 I32 anum;
3144
3145 if (MAXARG < 1)
3146 anum = 0;
9d3c658e
FC		 3147 else if (!TOPs) {
3148 anum = 0; (void)POPs;
3149 }
ff0cee69 3150 else {
a0d0e21e 3151 anum = SvIVx(POPs);
d98f61e7
GS		 3152#ifdef VMS
3153 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 3154 anum = 0;
96e176bf 3155 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69 3156#endif
3157 }
cc3604b1 3158 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC		 3159#ifdef PERL_MAD
3160 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
3161 if (anum || !(PL_minus_c && PL_madskills))
3162 my_exit(anum);
3163#else
a0d0e21e 3164 my_exit(anum);
81d86705 3165#endif
3280af22 3166 PUSHs(&PL_sv_undef);
a0d0e21e
LW		 3167 RETURN;
3168}
3169
a0d0e21e
LW		 3170/* Eval. */
3171
0824fdcb 3172STATIC void
cea2e8a9 3173S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3174{
504618e9 3175 const char *s = SvPVX_const(sv);
890ce7af 3176 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3177 I32 line = 1;
a0d0e21e 3178
7918f24d
NC		 3179 PERL_ARGS_ASSERT_SAVE_LINES;
3180
a0d0e21e 3181 while (s && s < send) {
f54cb97a 3182 const char *t;
b9f83d2f 3183 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3184
1d963ff3 3185 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW		 3186 if (t)
3187 t++;
3188 else
3189 t = send;
3190
3191 sv_setpvn(tmpstr, s, t - s);
3192 av_store(array, line++, tmpstr);
3193 s = t;
3194 }
3195}
3196
22f16304
RU		 3197/*
3198=for apidoc docatch
3199
3200Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3201
32020 is used as continue inside eval,
3203
32043 is used for a die caught by an inner eval - continue inner loop
3205
3206See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
3207establish a local jmpenv to handle exception traps.
3208
3209=cut
3210*/
0824fdcb 3211STATIC OP *
cea2e8a9 3212S_docatch(pTHX_ OP *o)
1e422769 3213{
97aff369 3214 dVAR;
6224f72b 3215 int ret;
06b5626a 3216 OP * const oldop = PL_op;
db36c5a1 3217 dJMPENV;
1e422769 3218
1e422769 3219#ifdef DEBUGGING
54310121 3220 assert(CATCH_GET == TRUE);
1e422769 3221#endif
312caa8e 3222 PL_op = o;
8bffa5f8 3223
14dd3ad8 3224 JMPENV_PUSH(ret);
6224f72b 3225 switch (ret) {
312caa8e 3226 case 0:
abd70938
DM		 3227 assert(cxstack_ix >= 0);
3228 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3229 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3230 redo_body:
85aaa934 3231 CALLRUNOPS(aTHX);
312caa8e
CS		 3232 break;
3233 case 3:
8bffa5f8 3234 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z		 3235 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3236 PL_restartjmpenv = NULL;
312caa8e
CS		 3237 PL_op = PL_restartop;
3238 PL_restartop = 0;
3239 goto redo_body;
3240 }
3241 /* FALL THROUGH */
3242 default:
14dd3ad8 3243 JMPENV_POP;
533c011a 3244 PL_op = oldop;
6224f72b 3245 JMPENV_JUMP(ret);
1e422769 3246 /* NOTREACHED */
1e422769 3247 }
14dd3ad8 3248 JMPENV_POP;
533c011a 3249 PL_op = oldop;
5f66b61c 3250 return NULL;
1e422769 3251}
3252
ee23ad3b
NC		 3253/* James Bond: Do you expect me to talk?
3254 Auric Goldfinger: No, Mr. Bond. I expect you to die.
3255
3256 This code is an ugly hack, doesn't work with lexicals in subroutines that are
3257 called more than once, and is only used by regcomp.c, for (?{}) blocks.
3258
3259 Currently it is not used outside the core code. Best if it stays that way.
d59a8b3e
NC		 3260
3261 Hence it's now deprecated, and will be removed.
ee23ad3b 3262*/
c277df42 3263OP *
bfed75c6 3264Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ		 3265/* sv Text to convert to OP tree. */
3266/* startop op_free() this to undo. */
3267/* code Short string id of the caller. */
3268{
d59a8b3e
NC		 3269 PERL_ARGS_ASSERT_SV_COMPILE_2OP;
3270 return Perl_sv_compile_2op_is_broken(aTHX_ sv, startop, code, padp);
3271}
3272
3273/* Don't use this. It will go away without warning once the regexp engine is
3274 refactored not to use it. */
3275OP *
3276Perl_sv_compile_2op_is_broken(pTHX_ SV *sv, OP **startop, const char *code,
3277 PAD **padp)
3278{
27da23d5 3279 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ		 3280 PERL_CONTEXT *cx;
3281 SV **newsp;
b094c71d 3282 I32 gimme = G_VOID;
c277df42
IZ		 3283 I32 optype;
3284 OP dummy;
83ee9e09
GS		 3285 char tbuf[TYPE_DIGITS(long) + 12 + 10];
3286 char *tmpbuf = tbuf;
c277df42 3287 char *safestr;
a3985cdc 3288 int runtime;
601f1833 3289 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 3290 STRLEN len;
634d6919 3291 bool need_catch;
c277df42 3292
d59a8b3e 3293 PERL_ARGS_ASSERT_SV_COMPILE_2OP_IS_BROKEN;
7918f24d 3294
d343c3ef 3295 ENTER_with_name("eval");
27fcb6ee 3296 lex_start(sv, NULL, LEX_START_SAME_FILTER);
c277df42
IZ		 3297 SAVETMPS;
3298 /* switch to eval mode */
3299
923e4eb5 3300 if (IN_PERL_COMPILETIME) {
f4dd75d9 3301 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 3302 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 3303 }
83ee9e09 3304 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 3305 SV * const sv = sv_newmortal();
83ee9e09
GS		 3306 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
3307 code, (unsigned long)++PL_evalseq,
3308 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
3309 tmpbuf = SvPVX(sv);
fc009855 3310 len = SvCUR(sv);
83ee9e09
GS		 3311 }
3312 else
d9fad198
JH		 3313 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
3314 (unsigned long)++PL_evalseq);
f4dd75d9 3315 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3316 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 3317 SAVECOPLINE(&PL_compiling);
57843af0 3318 CopLINE_set(&PL_compiling, 1);
c277df42
IZ		 3319 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
3320 deleting the eval's FILEGV from the stash before gv_check() runs
3321 (i.e. before run-time proper). To work around the coredump that
3322 ensues, we always turn GvMULTI_on for any globals that were
3323 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC		 3324 safestr = savepvn(tmpbuf, len);
3325 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 3326 SAVEHINTS();
d1ca3daa 3327#ifdef OP_IN_REGISTER
6b88bc9c 3328 PL_opsave = op;
d1ca3daa 3329#else
7766f137 3330 SAVEVPTR(PL_op);
d1ca3daa 3331#endif
c277df42 3332
a3985cdc 3333 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 3334 runtime = IN_PERL_RUNTIME;
a3985cdc 3335 if (runtime)
558b4424 3336 {
d819b83a 3337 runcv = find_runcv(NULL);
a3985cdc 3338
558b4424
FC		 3339 /* At run time, we have to fetch the hints from PL_curcop. */
3340 PL_hints = PL_curcop->cop_hints;
3341 if (PL_hints & HINT_LOCALIZE_HH) {
3342 /* SAVEHINTS created a new HV in PL_hintgv, which we
3343 need to GC */
3344 SvREFCNT_dec(GvHV(PL_hintgv));
3345 GvHV(PL_hintgv) =
3346 refcounted_he_chain_2hv(PL_curcop->cop_hints_hash, 0);
3347 hv_magic(GvHV(PL_hintgv), NULL, PERL_MAGIC_hints);
3348 }
3349 SAVECOMPILEWARNINGS();
3350 PL_compiling.cop_warnings = DUP_WARNINGS(PL_curcop->cop_warnings);
3351 cophh_free(CopHINTHASH_get(&PL_compiling));
3352 /* XXX Does this need to avoid copying a label? */
3353 PL_compiling.cop_hints_hash
3354 = cophh_copy(PL_curcop->cop_hints_hash);
3355 }
3356
533c011a 3357 PL_op = &dummy;
13b51b79 3358 PL_op->op_type = OP_ENTEREVAL;
533c011a 3359 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 3360 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 3361 PUSHEVAL(cx, 0);
634d6919
GG		 3362 need_catch = CATCH_GET;
3363 CATCH_SET(TRUE);
a3985cdc
DM		 3364
3365 if (runtime)
410be5db 3366 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 3367 else
410be5db 3368 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
634d6919 3369 CATCH_SET(need_catch);
13b51b79 3370 POPBLOCK(cx,PL_curpm);
e84b9f1f 3371 POPEVAL(cx);
c277df42
IZ		 3372
3373 (*startop)->op_type = OP_NULL;
22c35a8c 3374 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
f3548bdc 3375 /* XXX DAPM do this properly one year */
502c6561 3376 *padp = MUTABLE_AV(SvREFCNT_inc_simple(PL_comppad));
d343c3ef 3377 LEAVE_with_name("eval");
923e4eb5 3378 if (IN_PERL_COMPILETIME)
623e6609 3379 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 3380#ifdef OP_IN_REGISTER
6b88bc9c 3381 op = PL_opsave;
d1ca3daa 3382#endif
9d4ba2ae
AL		 3383 PERL_UNUSED_VAR(newsp);
3384 PERL_UNUSED_VAR(optype);
3385
410be5db 3386 return PL_eval_start;
c277df42
IZ		 3387}
3388
a3985cdc
DM		 3389
3390/*
3391=for apidoc find_runcv
3392
3393Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM		 3394If db_seqp is non_null, skip CVs that are in the DB package and populate
3395*db_seqp with the cop sequence number at the point that the DB:: code was
3396entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 3397than in the scope of the debugger itself).
a3985cdc
DM		 3398
3399=cut
3400*/
3401
3402CV*
d819b83a 3403Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3404{
97aff369 3405 dVAR;
a3985cdc 3406 PERL_SI *si;
a3985cdc 3407
d819b83a
DM		 3408 if (db_seqp)
3409 *db_seqp = PL_curcop->cop_seq;
a3985cdc 3410 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3411 I32 ix;
a3985cdc 3412 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3413 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 3414 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 3415 CV * const cv = cx->blk_sub.cv;
d819b83a
DM		 3416 /* skip DB:: code */
3417 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3418 *db_seqp = cx->blk_oldcop->cop_seq;
3419 continue;
3420 }
3421 return cv;
3422 }
a3985cdc
DM		 3423 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
3424 return PL_compcv;
3425 }
3426 }
3427 return PL_main_cv;
3428}
3429
3430
27e90453
DM		 3431/* Run yyparse() in a setjmp wrapper. Returns:
3432 * 0: yyparse() successful
3433 * 1: yyparse() failed
3434 * 3: yyparse() died
3435 */
3436STATIC int
28ac2b49 3437S_try_yyparse(pTHX_ int gramtype)
27e90453
DM		 3438{
3439 int ret;
3440 dJMPENV;
3441
3442 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3443 JMPENV_PUSH(ret);
3444 switch (ret) {
3445 case 0:
28ac2b49 3446 ret = yyparse(gramtype) ? 1 : 0;
27e90453
DM		 3447 break;
3448 case 3:
3449 break;
3450 default:
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