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[perl #114020, #90018, #53186] Make given alias $_
[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW
1/* pp_ctl.c
2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
4ac71550
TC
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 *
19 * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
a0d0e21e
LW
20 */
21
166f8a29
DM
22/* This file contains control-oriented pp ("push/pop") functions that
23 * execute the opcodes that make up a perl program. A typical pp function
24 * expects to find its arguments on the stack, and usually pushes its
25 * results onto the stack, hence the 'pp' terminology. Each OP structure
26 * contains a pointer to the relevant pp_foo() function.
27 *
28 * Control-oriented means things like pp_enteriter() and pp_next(), which
29 * alter the flow of control of the program.
30 */
31
32
a0d0e21e 33#include "EXTERN.h"
864dbfa3 34#define PERL_IN_PP_CTL_C
a0d0e21e
LW
35#include "perl.h"
36
54310121 37#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 38
94fcd414
NC
39#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
40
a0d0e21e
LW
41PP(pp_wantarray)
42{
97aff369 43 dVAR;
39644a26 44 dSP;
a0d0e21e 45 I32 cxix;
93f0bc49 46 const PERL_CONTEXT *cx;
a0d0e21e
LW
47 EXTEND(SP, 1);
48
93f0bc49
FC
49 if (PL_op->op_private & OPpOFFBYONE) {
50 if (!(cx = caller_cx(1,NULL))) RETPUSHUNDEF;
51 }
52 else {
53 cxix = dopoptosub(cxstack_ix);
54 if (cxix < 0)
a0d0e21e 55 RETPUSHUNDEF;
93f0bc49
FC
56 cx = &cxstack[cxix];
57 }
a0d0e21e 58
93f0bc49 59 switch (cx->blk_gimme) {
54310121 60 case G_ARRAY:
a0d0e21e 61 RETPUSHYES;
54310121 62 case G_SCALAR:
a0d0e21e 63 RETPUSHNO;
54310121
PP
64 default:
65 RETPUSHUNDEF;
66 }
a0d0e21e
LW
67}
68
2cd61cdb
IZ
69PP(pp_regcreset)
70{
97aff369 71 dVAR;
0b4182de 72 TAINT_NOT;
2cd61cdb
IZ
73 return NORMAL;
74}
75
b3eb6a9b
GS
76PP(pp_regcomp)
77{
97aff369 78 dVAR;
39644a26 79 dSP;
a0d0e21e 80 register PMOP *pm = (PMOP*)cLOGOP->op_other;
9f141731 81 SV **args;
df787a7b 82 int nargs;
84679df5 83 REGEXP *re = NULL;
9f141731
DM
84 REGEXP *new_re;
85 const regexp_engine *eng;
76ac488f 86 bool is_bare_re;
bfed75c6 87
df787a7b
DM
88 if (PL_op->op_flags & OPf_STACKED) {
89 dMARK;
90 nargs = SP - MARK;
91 args = ++MARK;
92 }
93 else {
94 nargs = 1;
95 args = SP;
96 }
97
4b5a0d1c 98 /* prevent recompiling under /o and ithreads. */
3db8f154 99#if defined(USE_ITHREADS)
131b3ad0 100 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
df787a7b 101 SP = args-1;
131b3ad0
DM
102 RETURN;
103 }
513629ba 104#endif
d4b87e75 105
9f141731
DM
106 re = PM_GETRE(pm);
107 assert (re != (REGEXP*) &PL_sv_undef);
108 eng = re ? RX_ENGINE(re) : current_re_engine();
109
3c13cae6
DM
110 new_re = (eng->op_comp
111 ? eng->op_comp
112 : &Perl_re_op_compile
113 )(aTHX_ args, nargs, pm->op_code_list, eng, re,
346d3070 114 &is_bare_re,
514a91f1 115 (pm->op_pmflags & RXf_PMf_COMPILETIME),
a5ae69f0
DM
116 pm->op_pmflags |
117 (PL_op->op_flags & OPf_SPECIAL ? PMf_USE_RE_EVAL : 0));
346d3070 118 if (pm->op_pmflags & PMf_HAS_CV)
9ef2bcf6 119 ((struct regexp *)SvANY(new_re))->qr_anoncv
9fe3265f 120 = (CV*) SvREFCNT_inc(PAD_SV(PL_op->op_targ));
9f141731
DM
121
122 if (is_bare_re) {
123 REGEXP *tmp;
124 /* The match's LHS's get-magic might need to access this op's regexp
125 (e.g. $' =~ /$re/ while foo; see bug 70764). So we must call
126 get-magic now before we replace the regexp. Hopefully this hack can
127 be replaced with the approach described at
128 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03/msg122415.html
129 some day. */
130 if (pm->op_type == OP_MATCH) {
131 SV *lhs;
132 const bool was_tainted = PL_tainted;
133 if (pm->op_flags & OPf_STACKED)
134 lhs = args[-1];
135 else if (pm->op_private & OPpTARGET_MY)
136 lhs = PAD_SV(pm->op_targ);
137 else lhs = DEFSV;
138 SvGETMAGIC(lhs);
139 /* Restore the previous value of PL_tainted (which may have been
140 modified by get-magic), to avoid incorrectly setting the
141 RXf_TAINTED flag further down. */
142 PL_tainted = was_tainted;
df787a7b 143 }
9f141731
DM
144 tmp = reg_temp_copy(NULL, new_re);
145 ReREFCNT_dec(new_re);
146 new_re = tmp;
df787a7b 147 }
9f141731
DM
148 if (re != new_re) {
149 ReREFCNT_dec(re);
150 PM_SETRE(pm, new_re);
c277df42 151 }
d4b87e75 152
72311751 153#ifndef INCOMPLETE_TAINTS
9f141731
DM
154 if (PL_tainting && PL_tainted) {
155 SvTAINTED_on((SV*)new_re);
156 RX_EXTFLAGS(new_re) |= RXf_TAINTED;
72311751
GS
157 }
158#endif
159
c737faaf
YO
160#if !defined(USE_ITHREADS)
161 /* can't change the optree at runtime either */
162 /* PMf_KEEP is handled differently under threads to avoid these problems */
9f141731
DM
163 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
164 pm = PL_curpm;
a0d0e21e 165 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 166 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 167 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 168 }
c737faaf 169#endif
9f141731 170
df787a7b 171 SP = args-1;
a0d0e21e
LW
172 RETURN;
173}
174
9f141731 175
a0d0e21e
LW
176PP(pp_substcont)
177{
97aff369 178 dVAR;
39644a26 179 dSP;
c09156bb 180 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
181 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
182 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
183 register char *s = cx->sb_s;
184 register char *m = cx->sb_m;
185 char *orig = cx->sb_orig;
901017d6 186 register REGEXP * const rx = cx->sb_rx;
c445ea15 187 SV *nsv = NULL;
988e6e7e 188 REGEXP *old = PM_GETRE(pm);
f410a211
NC
189
190 PERL_ASYNC_CHECK();
191
988e6e7e 192 if(old != rx) {
bfed75c6 193 if(old)
988e6e7e 194 ReREFCNT_dec(old);
d6106309 195 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
196 }
197
d9f97599 198 rxres_restore(&cx->sb_rxres, rx);
01b35787 199 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 200
a0d0e21e 201 if (cx->sb_iters++) {
a3b680e6 202 const I32 saviters = cx->sb_iters;
a0d0e21e 203 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 204 DIE(aTHX_ "Substitution loop");
a0d0e21e 205
447ee134
DM
206 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
207
ef07e810 208 /* See "how taint works" above pp_subst() */
20be6587
DM
209 if (SvTAINTED(TOPs))
210 cx->sb_rxtainted |= SUBST_TAINT_REPL;
447ee134 211 sv_catsv_nomg(dstr, POPs);
2c296965
YO
212 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
213 s -= RX_GOFS(rx);
a0d0e21e
LW
214
215 /* Are we done */
2c296965
YO
216 if (CxONCE(cx) || s < orig ||
217 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
218 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
219 ((cx->sb_rflags & REXEC_COPY_STR)
220 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
221 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 222 {
8ca8a454 223 SV *targ = cx->sb_targ;
748a9306 224
078c425b
JH
225 assert(cx->sb_strend >= s);
226 if(cx->sb_strend > s) {
227 if (DO_UTF8(dstr) && !SvUTF8(targ))
4bac9ae4 228 sv_catpvn_nomg_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
078c425b 229 else
4bac9ae4 230 sv_catpvn_nomg(dstr, s, cx->sb_strend - s);
078c425b 231 }
20be6587
DM
232 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
233 cx->sb_rxtainted |= SUBST_TAINT_PAT;
9212bbba 234
8ca8a454
NC
235 if (pm->op_pmflags & PMf_NONDESTRUCT) {
236 PUSHs(dstr);
237 /* From here on down we're using the copy, and leaving the
238 original untouched. */
239 targ = dstr;
240 }
241 else {
8ca8a454
NC
242 if (SvIsCOW(targ)) {
243 sv_force_normal_flags(targ, SV_COW_DROP_PV);
244 } else
8ca8a454
NC
245 {
246 SvPV_free(targ);
247 }
248 SvPV_set(targ, SvPVX(dstr));
249 SvCUR_set(targ, SvCUR(dstr));
250 SvLEN_set(targ, SvLEN(dstr));
251 if (DO_UTF8(dstr))
252 SvUTF8_on(targ);
253 SvPV_set(dstr, NULL);
254
4f4d7508 255 mPUSHi(saviters - 1);
48c036b1 256
8ca8a454
NC
257 (void)SvPOK_only_UTF8(targ);
258 }
5cd24f17 259
20be6587 260 /* update the taint state of various various variables in
ef07e810
DM
261 * preparation for final exit.
262 * See "how taint works" above pp_subst() */
20be6587
DM
263 if (PL_tainting) {
264 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
265 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
266 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
267 )
268 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
269
270 if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
271 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
272 )
273 SvTAINTED_on(TOPs); /* taint return value */
274 /* needed for mg_set below */
275 PL_tainted = cBOOL(cx->sb_rxtainted &
276 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL));
277 SvTAINT(TARG);
278 }
279 /* PL_tainted must be correctly set for this mg_set */
280 SvSETMAGIC(TARG);
281 TAINT_NOT;
4633a7c4 282 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
283 POPSUBST(cx);
284 RETURNOP(pm->op_next);
118e2215 285 assert(0); /* NOTREACHED */
a0d0e21e 286 }
8e5e9ebe 287 cx->sb_iters = saviters;
a0d0e21e 288 }
07bc277f 289 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
290 m = s;
291 s = orig;
07bc277f 292 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
293 s = orig + (m - s);
294 cx->sb_strend = s + (cx->sb_strend - m);
295 }
07bc277f 296 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 297 if (m > s) {
bfed75c6 298 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
4bac9ae4 299 sv_catpvn_nomg_utf8_upgrade(dstr, s, m - s, nsv);
db79b45b 300 else
4bac9ae4 301 sv_catpvn_nomg(dstr, s, m-s);
db79b45b 302 }
07bc277f 303 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 304 { /* Update the pos() information. */
8ca8a454
NC
305 SV * const sv
306 = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
084916e3 307 MAGIC *mg;
7a7f3e45 308 SvUPGRADE(sv, SVt_PVMG);
14befaf4 309 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 310#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 311 if (SvIsCOW(sv))
d83f0a82
NC
312 sv_force_normal_flags(sv, 0);
313#endif
314 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
315 NULL, 0);
084916e3 316 }
ce474962 317 mg->mg_len = m - orig;
084916e3 318 }
988e6e7e 319 if (old != rx)
d6106309 320 (void)ReREFCNT_inc(rx);
20be6587 321 /* update the taint state of various various variables in preparation
ef07e810
DM
322 * for calling the code block.
323 * See "how taint works" above pp_subst() */
20be6587
DM
324 if (PL_tainting) {
325 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
326 cx->sb_rxtainted |= SUBST_TAINT_PAT;
327
328 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
329 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
330 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
331 )
332 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
333
334 if (cx->sb_iters > 1 && (cx->sb_rxtainted &
335 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
8ca8a454
NC
336 SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
337 ? cx->sb_dstr : cx->sb_targ);
20be6587
DM
338 TAINT_NOT;
339 }
d9f97599 340 rxres_save(&cx->sb_rxres, rx);
af9838cc 341 PL_curpm = pm;
29f2e912 342 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
343}
344
c90c0ff4 345void
864dbfa3 346Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
347{
348 UV *p = (UV*)*rsp;
349 U32 i;
7918f24d
NC
350
351 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 352 PERL_UNUSED_CONTEXT;
c90c0ff4 353
07bc277f 354 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 355#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 356 i = 7 + RX_NPARENS(rx) * 2;
ed252734 357#else
07bc277f 358 i = 6 + RX_NPARENS(rx) * 2;
ed252734 359#endif
c90c0ff4 360 if (!p)
a02a5408 361 Newx(p, i, UV);
c90c0ff4
PP
362 else
363 Renew(p, i, UV);
364 *rsp = (void*)p;
365 }
366
07bc277f 367 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 368 RX_MATCH_COPIED_off(rx);
c90c0ff4 369
f8c7b90f 370#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
371 *p++ = PTR2UV(RX_SAVED_COPY(rx));
372 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
373#endif
374
07bc277f 375 *p++ = RX_NPARENS(rx);
c90c0ff4 376
07bc277f
NC
377 *p++ = PTR2UV(RX_SUBBEG(rx));
378 *p++ = (UV)RX_SUBLEN(rx);
379 for (i = 0; i <= RX_NPARENS(rx); ++i) {
380 *p++ = (UV)RX_OFFS(rx)[i].start;
381 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
382 }
383}
384
9c105995
NC
385static void
386S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
387{
388 UV *p = (UV*)*rsp;
389 U32 i;
7918f24d
NC
390
391 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 392 PERL_UNUSED_CONTEXT;
c90c0ff4 393
ed252734 394 RX_MATCH_COPY_FREE(rx);
cf93c79d 395 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
396 *p++ = 0;
397
f8c7b90f 398#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
399 if (RX_SAVED_COPY(rx))
400 SvREFCNT_dec (RX_SAVED_COPY(rx));
401 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
402 *p++ = 0;
403#endif
404
07bc277f 405 RX_NPARENS(rx) = *p++;
c90c0ff4 406
07bc277f
NC
407 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
408 RX_SUBLEN(rx) = (I32)(*p++);
409 for (i = 0; i <= RX_NPARENS(rx); ++i) {
410 RX_OFFS(rx)[i].start = (I32)(*p++);
411 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
412 }
413}
414
9c105995
NC
415static void
416S_rxres_free(pTHX_ void **rsp)
c90c0ff4 417{
44f8325f 418 UV * const p = (UV*)*rsp;
7918f24d
NC
419
420 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 421 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
422
423 if (p) {
94010e71
NC
424#ifdef PERL_POISON
425 void *tmp = INT2PTR(char*,*p);
426 Safefree(tmp);
427 if (*p)
7e337ee0 428 PoisonFree(*p, 1, sizeof(*p));
94010e71 429#else
56431972 430 Safefree(INT2PTR(char*,*p));
94010e71 431#endif
f8c7b90f 432#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
433 if (p[1]) {
434 SvREFCNT_dec (INT2PTR(SV*,p[1]));
435 }
436#endif
c90c0ff4 437 Safefree(p);
4608196e 438 *rsp = NULL;
c90c0ff4
PP
439 }
440}
441
a701009a
DM
442#define FORM_NUM_BLANK (1<<30)
443#define FORM_NUM_POINT (1<<29)
444
a0d0e21e
LW
445PP(pp_formline)
446{
97aff369 447 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 448 register SV * const tmpForm = *++MARK;
086b26f3
DM
449 SV *formsv; /* contains text of original format */
450 register U32 *fpc; /* format ops program counter */
451 register char *t; /* current append position in target string */
452 const char *f; /* current position in format string */
a0d0e21e 453 register I32 arg;
086b26f3
DM
454 register SV *sv = NULL; /* current item */
455 const char *item = NULL;/* string value of current item */
456 I32 itemsize = 0; /* length of current item, possibly truncated */
457 I32 fieldsize = 0; /* width of current field */
458 I32 lines = 0; /* number of lines that have been output */
459 bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
460 const char *chophere = NULL; /* where to chop current item */
f5ada144 461 STRLEN linemark = 0; /* pos of start of line in output */
65202027 462 NV value;
086b26f3 463 bool gotsome = FALSE; /* seen at least one non-blank item on this line */
a0d0e21e 464 STRLEN len;
26e935cf 465 STRLEN linemax; /* estimate of output size in bytes */
1bd51a4c
IH
466 bool item_is_utf8 = FALSE;
467 bool targ_is_utf8 = FALSE;
bfed75c6 468 const char *fmt;
74e0ddf7 469 MAGIC *mg = NULL;
4ff700b9
DM
470 U8 *source; /* source of bytes to append */
471 STRLEN to_copy; /* how may bytes to append */
ea60cfe8 472 char trans; /* what chars to translate */
74e0ddf7 473
3808a683 474 mg = doparseform(tmpForm);
a0d0e21e 475
74e0ddf7 476 fpc = (U32*)mg->mg_ptr;
3808a683
DM
477 /* the actual string the format was compiled from.
478 * with overload etc, this may not match tmpForm */
479 formsv = mg->mg_obj;
480
74e0ddf7 481
3280af22 482 SvPV_force(PL_formtarget, len);
3808a683 483 if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
125b9982 484 SvTAINTED_on(PL_formtarget);
1bd51a4c
IH
485 if (DO_UTF8(PL_formtarget))
486 targ_is_utf8 = TRUE;
26e935cf
DM
487 linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
488 t = SvGROW(PL_formtarget, len + linemax + 1);
489 /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
a0d0e21e 490 t += len;
3808a683 491 f = SvPV_const(formsv, len);
a0d0e21e
LW
492
493 for (;;) {
494 DEBUG_f( {
bfed75c6 495 const char *name = "???";
a0d0e21e
LW
496 arg = -1;
497 switch (*fpc) {
498 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
499 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
500 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
501 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
502 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
503
504 case FF_CHECKNL: name = "CHECKNL"; break;
505 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
506 case FF_SPACE: name = "SPACE"; break;
507 case FF_HALFSPACE: name = "HALFSPACE"; break;
508 case FF_ITEM: name = "ITEM"; break;
509 case FF_CHOP: name = "CHOP"; break;
510 case FF_LINEGLOB: name = "LINEGLOB"; break;
511 case FF_NEWLINE: name = "NEWLINE"; break;
512 case FF_MORE: name = "MORE"; break;
513 case FF_LINEMARK: name = "LINEMARK"; break;
514 case FF_END: name = "END"; break;
bfed75c6 515 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 516 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
517 }
518 if (arg >= 0)
bf49b057 519 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 520 else
bf49b057 521 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 522 } );
a0d0e21e
LW
523 switch (*fpc++) {
524 case FF_LINEMARK:
f5ada144 525 linemark = t - SvPVX(PL_formtarget);
a0d0e21e
LW
526 lines++;
527 gotsome = FALSE;
528 break;
529
530 case FF_LITERAL:
ea60cfe8
DM
531 to_copy = *fpc++;
532 source = (U8 *)f;
533 f += to_copy;
534 trans = '~';
75645721 535 item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
ea60cfe8 536 goto append;
a0d0e21e
LW
537
538 case FF_SKIP:
539 f += *fpc++;
540 break;
541
542 case FF_FETCH:
543 arg = *fpc++;
544 f += arg;
545 fieldsize = arg;
546
547 if (MARK < SP)
548 sv = *++MARK;
549 else {
3280af22 550 sv = &PL_sv_no;
a2a5de95 551 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e 552 }
125b9982
NT
553 if (SvTAINTED(sv))
554 SvTAINTED_on(PL_formtarget);
a0d0e21e
LW
555 break;
556
557 case FF_CHECKNL:
5a34cab7
NC
558 {
559 const char *send;
560 const char *s = item = SvPV_const(sv, len);
561 itemsize = len;
562 if (DO_UTF8(sv)) {
563 itemsize = sv_len_utf8(sv);
564 if (itemsize != (I32)len) {
565 I32 itembytes;
566 if (itemsize > fieldsize) {
567 itemsize = fieldsize;
568 itembytes = itemsize;
569 sv_pos_u2b(sv, &itembytes, 0);
570 }
571 else
572 itembytes = len;
573 send = chophere = s + itembytes;
574 while (s < send) {
575 if (*s & ~31)
576 gotsome = TRUE;
577 else if (*s == '\n')
578 break;
579 s++;
580 }
581 item_is_utf8 = TRUE;
582 itemsize = s - item;
583 sv_pos_b2u(sv, &itemsize);
584 break;
a0ed51b3 585 }
a0ed51b3 586 }
5a34cab7
NC
587 item_is_utf8 = FALSE;
588 if (itemsize > fieldsize)
589 itemsize = fieldsize;
590 send = chophere = s + itemsize;
591 while (s < send) {
592 if (*s & ~31)
593 gotsome = TRUE;
594 else if (*s == '\n')
595 break;
596 s++;
597 }
598 itemsize = s - item;
599 break;
a0ed51b3 600 }
a0d0e21e
LW
601
602 case FF_CHECKCHOP:
5a34cab7
NC
603 {
604 const char *s = item = SvPV_const(sv, len);
605 itemsize = len;
606 if (DO_UTF8(sv)) {
607 itemsize = sv_len_utf8(sv);
608 if (itemsize != (I32)len) {
609 I32 itembytes;
610 if (itemsize <= fieldsize) {
611 const char *send = chophere = s + itemsize;
612 while (s < send) {
613 if (*s == '\r') {
614 itemsize = s - item;
a0ed51b3 615 chophere = s;
a0ed51b3 616 break;
5a34cab7
NC
617 }
618 if (*s++ & ~31)
a0ed51b3 619 gotsome = TRUE;
a0ed51b3 620 }
a0ed51b3 621 }
5a34cab7
NC
622 else {
623 const char *send;
624 itemsize = fieldsize;
625 itembytes = itemsize;
626 sv_pos_u2b(sv, &itembytes, 0);
627 send = chophere = s + itembytes;
628 while (s < send || (s == send && isSPACE(*s))) {
629 if (isSPACE(*s)) {
630 if (chopspace)
631 chophere = s;
632 if (*s == '\r')
633 break;
634 }
635 else {
636 if (*s & ~31)
637 gotsome = TRUE;
638 if (strchr(PL_chopset, *s))
639 chophere = s + 1;
640 }
641 s++;
642 }
643 itemsize = chophere - item;
644 sv_pos_b2u(sv, &itemsize);
645 }
646 item_is_utf8 = TRUE;
a0d0e21e
LW
647 break;
648 }
a0d0e21e 649 }
5a34cab7
NC
650 item_is_utf8 = FALSE;
651 if (itemsize <= fieldsize) {
652 const char *const send = chophere = s + itemsize;
653 while (s < send) {
654 if (*s == '\r') {
655 itemsize = s - item;
a0d0e21e 656 chophere = s;
a0d0e21e 657 break;
5a34cab7
NC
658 }
659 if (*s++ & ~31)
a0d0e21e 660 gotsome = TRUE;
a0d0e21e 661 }
a0d0e21e 662 }
5a34cab7
NC
663 else {
664 const char *send;
665 itemsize = fieldsize;
666 send = chophere = s + itemsize;
667 while (s < send || (s == send && isSPACE(*s))) {
668 if (isSPACE(*s)) {
669 if (chopspace)
670 chophere = s;
671 if (*s == '\r')
672 break;
673 }
674 else {
675 if (*s & ~31)
676 gotsome = TRUE;
677 if (strchr(PL_chopset, *s))
678 chophere = s + 1;
679 }
680 s++;
681 }
682 itemsize = chophere - item;
683 }
684 break;
a0d0e21e 685 }
a0d0e21e
LW
686
687 case FF_SPACE:
688 arg = fieldsize - itemsize;
689 if (arg) {
690 fieldsize -= arg;
691 while (arg-- > 0)
692 *t++ = ' ';
693 }
694 break;
695
696 case FF_HALFSPACE:
697 arg = fieldsize - itemsize;
698 if (arg) {
699 arg /= 2;
700 fieldsize -= arg;
701 while (arg-- > 0)
702 *t++ = ' ';
703 }
704 break;
705
706 case FF_ITEM:
8aa7beb6
DM
707 to_copy = itemsize;
708 source = (U8 *)item;
709 trans = 1;
710 if (item_is_utf8) {
711 /* convert to_copy from chars to bytes */
712 U8 *s = source;
713 while (to_copy--)
714 s += UTF8SKIP(s);
715 to_copy = s - source;
a0d0e21e 716 }
8aa7beb6 717 goto append;
a0d0e21e
LW
718
719 case FF_CHOP:
5a34cab7
NC
720 {
721 const char *s = chophere;
722 if (chopspace) {
af68e756 723 while (isSPACE(*s))
5a34cab7
NC
724 s++;
725 }
726 sv_chop(sv,s);
727 SvSETMAGIC(sv);
728 break;
a0d0e21e 729 }
a0d0e21e 730
a1b95068
LW
731 case FF_LINESNGL:
732 chopspace = 0;
a0d0e21e 733 case FF_LINEGLOB:
5a34cab7 734 {
e32383e2 735 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 736 const char *s = item = SvPV_const(sv, len);
7440a75b 737 const char *const send = s + len;
7440a75b 738
f3f2f1a3 739 item_is_utf8 = DO_UTF8(sv);
a1137ee5 740 if (!len)
7440a75b 741 break;
ea60cfe8 742 trans = 0;
0d21cefe 743 gotsome = TRUE;
a1137ee5 744 chophere = s + len;
4ff700b9
DM
745 source = (U8 *) s;
746 to_copy = len;
0d21cefe
DM
747 while (s < send) {
748 if (*s++ == '\n') {
749 if (oneline) {
750 to_copy = s - SvPVX_const(sv) - 1;
751 chophere = s;
752 break;
753 } else {
754 if (s == send) {
0d21cefe
DM
755 to_copy--;
756 } else
757 lines++;
1bd51a4c 758 }
a0d0e21e 759 }
0d21cefe 760 }
a2c0032b
DM
761 }
762
ea60cfe8
DM
763 append:
764 /* append to_copy bytes from source to PL_formstring.
765 * item_is_utf8 implies source is utf8.
766 * if trans, translate certain characters during the copy */
a2c0032b
DM
767 {
768 U8 *tmp = NULL;
26e935cf 769 STRLEN grow = 0;
0325ce87
DM
770
771 SvCUR_set(PL_formtarget,
772 t - SvPVX_const(PL_formtarget));
773
0d21cefe
DM
774 if (targ_is_utf8 && !item_is_utf8) {
775 source = tmp = bytes_to_utf8(source, &to_copy);
0d21cefe
DM
776 } else {
777 if (item_is_utf8 && !targ_is_utf8) {
f5ada144 778 U8 *s;
0d21cefe 779 /* Upgrade targ to UTF8, and then we reduce it to
0325ce87
DM
780 a problem we have a simple solution for.
781 Don't need get magic. */
0d21cefe 782 sv_utf8_upgrade_nomg(PL_formtarget);
0325ce87 783 targ_is_utf8 = TRUE;
f5ada144
DM
784 /* re-calculate linemark */
785 s = (U8*)SvPVX(PL_formtarget);
26e935cf
DM
786 /* the bytes we initially allocated to append the
787 * whole line may have been gobbled up during the
788 * upgrade, so allocate a whole new line's worth
789 * for safety */
790 grow = linemax;
f5ada144
DM
791 while (linemark--)
792 s += UTF8SKIP(s);
793 linemark = s - (U8*)SvPVX(PL_formtarget);
e8e72d41 794 }
0d21cefe
DM
795 /* Easy. They agree. */
796 assert (item_is_utf8 == targ_is_utf8);
797 }
26e935cf
DM
798 if (!trans)
799 /* @* and ^* are the only things that can exceed
800 * the linemax, so grow by the output size, plus
801 * a whole new form's worth in case of any further
802 * output */
803 grow = linemax + to_copy;
804 if (grow)
805 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
0d21cefe
DM
806 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
807
808 Copy(source, t, to_copy, char);
ea60cfe8 809 if (trans) {
8aa7beb6
DM
810 /* blank out ~ or control chars, depending on trans.
811 * works on bytes not chars, so relies on not
812 * matching utf8 continuation bytes */
ea60cfe8
DM
813 U8 *s = (U8*)t;
814 U8 *send = s + to_copy;
815 while (s < send) {
8aa7beb6
DM
816 const int ch = *s;
817 if (trans == '~' ? (ch == '~') :
818#ifdef EBCDIC
819 iscntrl(ch)
820#else
821 (!(ch & ~31))
822#endif
823 )
ea60cfe8
DM
824 *s = ' ';
825 s++;
826 }
827 }
828
0d21cefe
DM
829 t += to_copy;
830 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
a1137ee5 831 if (tmp)
0d21cefe 832 Safefree(tmp);
5a34cab7 833 break;
a0d0e21e 834 }
a0d0e21e 835
a1b95068
LW
836 case FF_0DECIMAL:
837 arg = *fpc++;
838#if defined(USE_LONG_DOUBLE)
10edeb5d 839 fmt = (const char *)
a701009a 840 ((arg & FORM_NUM_POINT) ?
10edeb5d 841 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 842#else
10edeb5d 843 fmt = (const char *)
a701009a 844 ((arg & FORM_NUM_POINT) ?
10edeb5d 845 "%#0*.*f" : "%0*.*f");
a1b95068
LW
846#endif
847 goto ff_dec;
a0d0e21e 848 case FF_DECIMAL:
a0d0e21e 849 arg = *fpc++;
65202027 850#if defined(USE_LONG_DOUBLE)
10edeb5d 851 fmt = (const char *)
a701009a 852 ((arg & FORM_NUM_POINT) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 853#else
10edeb5d 854 fmt = (const char *)
a701009a 855 ((arg & FORM_NUM_POINT) ? "%#*.*f" : "%*.*f");
65202027 856#endif
a1b95068 857 ff_dec:
784707d5
JP
858 /* If the field is marked with ^ and the value is undefined,
859 blank it out. */
a701009a 860 if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
784707d5
JP
861 arg = fieldsize;
862 while (arg--)
863 *t++ = ' ';
864 break;
865 }
866 gotsome = TRUE;
867 value = SvNV(sv);
a1b95068 868 /* overflow evidence */
bfed75c6 869 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
870 arg = fieldsize;
871 while (arg--)
872 *t++ = '#';
873 break;
874 }
784707d5
JP
875 /* Formats aren't yet marked for locales, so assume "yes". */
876 {
877 STORE_NUMERIC_STANDARD_SET_LOCAL();
a701009a
DM
878 arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
879 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg, value);
784707d5
JP
880 RESTORE_NUMERIC_STANDARD();
881 }
882 t += fieldsize;
883 break;
a1b95068 884
a0d0e21e
LW
885 case FF_NEWLINE:
886 f++;
f5ada144 887 while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
a0d0e21e
LW
888 t++;
889 *t++ = '\n';
890 break;
891
892 case FF_BLANK:
893 arg = *fpc++;
894 if (gotsome) {
895 if (arg) { /* repeat until fields exhausted? */
11f9eeaf
DM
896 fpc--;
897 goto end;
a0d0e21e
LW
898 }
899 }
900 else {
f5ada144 901 t = SvPVX(PL_formtarget) + linemark;
a0d0e21e
LW
902 lines--;
903 }
904 break;
905
906 case FF_MORE:
5a34cab7
NC
907 {
908 const char *s = chophere;
909 const char *send = item + len;
910 if (chopspace) {
af68e756 911 while (isSPACE(*s) && (s < send))
5a34cab7 912 s++;
a0d0e21e 913 }
5a34cab7
NC
914 if (s < send) {
915 char *s1;
916 arg = fieldsize - itemsize;
917 if (arg) {
918 fieldsize -= arg;
919 while (arg-- > 0)
920 *t++ = ' ';
921 }
922 s1 = t - 3;
923 if (strnEQ(s1," ",3)) {
924 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
925 s1--;
926 }
927 *s1++ = '.';
928 *s1++ = '.';
929 *s1++ = '.';
a0d0e21e 930 }
5a34cab7 931 break;
a0d0e21e 932 }
a0d0e21e 933 case FF_END:
11f9eeaf 934 end:
bf2bec63 935 assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
a0d0e21e 936 *t = '\0';
b15aece3 937 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
938 if (targ_is_utf8)
939 SvUTF8_on(PL_formtarget);
3280af22 940 FmLINES(PL_formtarget) += lines;
a0d0e21e 941 SP = ORIGMARK;
11f9eeaf
DM
942 if (fpc[-1] == FF_BLANK)
943 RETURNOP(cLISTOP->op_first);
944 else
945 RETPUSHYES;
a0d0e21e
LW
946 }
947 }
948}
949
950PP(pp_grepstart)
951{
27da23d5 952 dVAR; dSP;
a0d0e21e
LW
953 SV *src;
954
3280af22 955 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 956 (void)POPMARK;
54310121 957 if (GIMME_V == G_SCALAR)
6e449a3a 958 mXPUSHi(0);
533c011a 959 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 960 }
3280af22 961 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
897d3989
NC
962 Perl_pp_pushmark(aTHX); /* push dst */
963 Perl_pp_pushmark(aTHX); /* push src */
d343c3ef 964 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW
965
966 SAVETMPS;
59f00321
RGS
967 if (PL_op->op_private & OPpGREP_LEX)
968 SAVESPTR(PAD_SVl(PL_op->op_targ));
969 else
970 SAVE_DEFSV;
d343c3ef 971 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 972 SAVEVPTR(PL_curpm);
a0d0e21e 973
3280af22 974 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 975 SvTEMP_off(src);
59f00321
RGS
976 if (PL_op->op_private & OPpGREP_LEX)
977 PAD_SVl(PL_op->op_targ) = src;
978 else
414bf5ae 979 DEFSV_set(src);
a0d0e21e
LW
980
981 PUTBACK;
533c011a 982 if (PL_op->op_type == OP_MAPSTART)
897d3989 983 Perl_pp_pushmark(aTHX); /* push top */
533c011a 984 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
985}
986
a0d0e21e
LW
987PP(pp_mapwhile)
988{
27da23d5 989 dVAR; dSP;
f54cb97a 990 const I32 gimme = GIMME_V;
544f3153 991 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
992 I32 count;
993 I32 shift;
994 SV** src;
ac27b0f5 995 SV** dst;
a0d0e21e 996
544f3153 997 /* first, move source pointer to the next item in the source list */
3280af22 998 ++PL_markstack_ptr[-1];
544f3153
GS
999
1000 /* if there are new items, push them into the destination list */
4c90a460 1001 if (items && gimme != G_VOID) {
544f3153
GS
1002 /* might need to make room back there first */
1003 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1004 /* XXX this implementation is very pessimal because the stack
1005 * is repeatedly extended for every set of items. Is possible
1006 * to do this without any stack extension or copying at all
1007 * by maintaining a separate list over which the map iterates
18ef8bea 1008 * (like foreach does). --gsar */
544f3153
GS
1009
1010 /* everything in the stack after the destination list moves
1011 * towards the end the stack by the amount of room needed */
1012 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1013
1014 /* items to shift up (accounting for the moved source pointer) */
1015 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
1016
1017 /* This optimization is by Ben Tilly and it does
1018 * things differently from what Sarathy (gsar)
1019 * is describing. The downside of this optimization is
1020 * that leaves "holes" (uninitialized and hopefully unused areas)
1021 * to the Perl stack, but on the other hand this
1022 * shouldn't be a problem. If Sarathy's idea gets
1023 * implemented, this optimization should become
1024 * irrelevant. --jhi */
1025 if (shift < count)
1026 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1027
924508f0
GS
1028 EXTEND(SP,shift);
1029 src = SP;
1030 dst = (SP += shift);
3280af22
NIS
1031 PL_markstack_ptr[-1] += shift;
1032 *PL_markstack_ptr += shift;
544f3153 1033 while (count--)
a0d0e21e
LW
1034 *dst-- = *src--;
1035 }
544f3153 1036 /* copy the new items down to the destination list */
ac27b0f5 1037 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26 1038 if (gimme == G_ARRAY) {
b2a2a901
DM
1039 /* add returned items to the collection (making mortal copies
1040 * if necessary), then clear the current temps stack frame
1041 * *except* for those items. We do this splicing the items
1042 * into the start of the tmps frame (so some items may be on
59d53fd6 1043 * the tmps stack twice), then moving PL_tmps_floor above
b2a2a901
DM
1044 * them, then freeing the frame. That way, the only tmps that
1045 * accumulate over iterations are the return values for map.
1046 * We have to do to this way so that everything gets correctly
1047 * freed if we die during the map.
1048 */
1049 I32 tmpsbase;
1050 I32 i = items;
1051 /* make space for the slice */
1052 EXTEND_MORTAL(items);
1053 tmpsbase = PL_tmps_floor + 1;
1054 Move(PL_tmps_stack + tmpsbase,
1055 PL_tmps_stack + tmpsbase + items,
1056 PL_tmps_ix - PL_tmps_floor,
1057 SV*);
1058 PL_tmps_ix += items;
1059
1060 while (i-- > 0) {
1061 SV *sv = POPs;
1062 if (!SvTEMP(sv))
1063 sv = sv_mortalcopy(sv);
1064 *dst-- = sv;
1065 PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
1066 }
1067 /* clear the stack frame except for the items */
1068 PL_tmps_floor += items;
1069 FREETMPS;
1070 /* FREETMPS may have cleared the TEMP flag on some of the items */
1071 i = items;
1072 while (i-- > 0)
1073 SvTEMP_on(PL_tmps_stack[--tmpsbase]);
22023b26 1074 }
bfed75c6 1075 else {
22023b26
TP
1076 /* scalar context: we don't care about which values map returns
1077 * (we use undef here). And so we certainly don't want to do mortal
1078 * copies of meaningless values. */
1079 while (items-- > 0) {
b988aa42 1080 (void)POPs;
22023b26
TP
1081 *dst-- = &PL_sv_undef;
1082 }
b2a2a901 1083 FREETMPS;
22023b26 1084 }
a0d0e21e 1085 }
b2a2a901
DM
1086 else {
1087 FREETMPS;
1088 }
d343c3ef 1089 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW
1090
1091 /* All done yet? */
3280af22 1092 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1093
1094 (void)POPMARK; /* pop top */
d343c3ef 1095 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1096 (void)POPMARK; /* pop src */
3280af22 1097 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1098 (void)POPMARK; /* pop dst */
3280af22 1099 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1100 if (gimme == G_SCALAR) {
7cc47870
RGS
1101 if (PL_op->op_private & OPpGREP_LEX) {
1102 SV* sv = sv_newmortal();
1103 sv_setiv(sv, items);
1104 PUSHs(sv);
1105 }
1106 else {
1107 dTARGET;
1108 XPUSHi(items);
1109 }
a0d0e21e 1110 }
54310121
PP
1111 else if (gimme == G_ARRAY)
1112 SP += items;
a0d0e21e
LW
1113 RETURN;
1114 }
1115 else {
1116 SV *src;
1117
d343c3ef 1118 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1119 SAVEVPTR(PL_curpm);
a0d0e21e 1120
544f3153 1121 /* set $_ to the new source item */
3280af22 1122 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1123 SvTEMP_off(src);
59f00321
RGS
1124 if (PL_op->op_private & OPpGREP_LEX)
1125 PAD_SVl(PL_op->op_targ) = src;
1126 else
414bf5ae 1127 DEFSV_set(src);
a0d0e21e
LW
1128
1129 RETURNOP(cLOGOP->op_other);
1130 }
1131}
1132
a0d0e21e
LW
1133/* Range stuff. */
1134
1135PP(pp_range)
1136{
97aff369 1137 dVAR;
a0d0e21e 1138 if (GIMME == G_ARRAY)
1a67a97c 1139 return NORMAL;
538573f7 1140 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1141 return cLOGOP->op_other;
538573f7 1142 else
1a67a97c 1143 return NORMAL;
a0d0e21e
LW
1144}
1145
1146PP(pp_flip)
1147{
97aff369 1148 dVAR;
39644a26 1149 dSP;
a0d0e21e
LW
1150
1151 if (GIMME == G_ARRAY) {
1a67a97c 1152 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1153 }
1154 else {
1155 dTOPss;
44f8325f 1156 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1157 int flip = 0;
790090df 1158
bfed75c6 1159 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1160 if (GvIO(PL_last_in_gv)) {
1161 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1162 }
1163 else {
fafc274c 1164 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1165 if (gv && GvSV(gv))
1166 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1167 }
bfed75c6
AL
1168 } else {
1169 flip = SvTRUE(sv);
1170 }
1171 if (flip) {
a0d0e21e 1172 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1173 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1174 sv_setiv(targ, 1);
3e3baf6d 1175 SETs(targ);
a0d0e21e
LW
1176 RETURN;
1177 }
1178 else {
1179 sv_setiv(targ, 0);
924508f0 1180 SP--;
1a67a97c 1181 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1182 }
1183 }
76f68e9b 1184 sv_setpvs(TARG, "");
a0d0e21e
LW
1185 SETs(targ);
1186 RETURN;
1187 }
1188}
1189
8e9bbdb9
RGS
1190/* This code tries to decide if "$left .. $right" should use the
1191 magical string increment, or if the range is numeric (we make
1192 an exception for .."0" [#18165]). AMS 20021031. */
1193
1194#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1195 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1196 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1197 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1198 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1199 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1200
a0d0e21e
LW
1201PP(pp_flop)
1202{
97aff369 1203 dVAR; dSP;
a0d0e21e
LW
1204
1205 if (GIMME == G_ARRAY) {
1206 dPOPPOPssrl;
86cb7173 1207
5b295bef
RD
1208 SvGETMAGIC(left);
1209 SvGETMAGIC(right);
a0d0e21e 1210
8e9bbdb9 1211 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1212 register IV i, j;
1213 IV max;
f52e41ad
FC
1214 if ((SvOK(left) && SvNV_nomg(left) < IV_MIN) ||
1215 (SvOK(right) && SvNV_nomg(right) > IV_MAX))
d470f89e 1216 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
1217 i = SvIV_nomg(left);
1218 max = SvIV_nomg(right);
bbce6d69 1219 if (max >= i) {
c1ab3db2
AK
1220 j = max - i + 1;
1221 EXTEND_MORTAL(j);
1222 EXTEND(SP, j);
bbce6d69 1223 }
c1ab3db2
AK
1224 else
1225 j = 0;
1226 while (j--) {
901017d6 1227 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1228 PUSHs(sv);
1229 }
1230 }
1231 else {
3c323193
FC
1232 STRLEN len, llen;
1233 const char * const lpv = SvPV_nomg_const(left, llen);
f52e41ad 1234 const char * const tmps = SvPV_nomg_const(right, len);
a0d0e21e 1235
3c323193 1236 SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP);
89ea2908 1237 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1238 XPUSHs(sv);
b15aece3 1239 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1240 break;
a0d0e21e
LW
1241 sv = sv_2mortal(newSVsv(sv));
1242 sv_inc(sv);
1243 }
a0d0e21e
LW
1244 }
1245 }
1246 else {
1247 dTOPss;
901017d6 1248 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1249 int flop = 0;
a0d0e21e 1250 sv_inc(targ);
4e3399f9
YST
1251
1252 if (PL_op->op_private & OPpFLIP_LINENUM) {
1253 if (GvIO(PL_last_in_gv)) {
1254 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1255 }
1256 else {
fafc274c 1257 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1258 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1259 }
1260 }
1261 else {
1262 flop = SvTRUE(sv);
1263 }
1264
1265 if (flop) {
a0d0e21e 1266 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1267 sv_catpvs(targ, "E0");
a0d0e21e
LW
1268 }
1269 SETs(targ);
1270 }
1271
1272 RETURN;
1273}
1274
1275/* Control. */
1276
27da23d5 1277static const char * const context_name[] = {
515afda2 1278 "pseudo-block",
f31522f3 1279 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1280 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1281 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1282 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1283 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1284 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1285 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1286 "subroutine",
76753e7f 1287 "format",
515afda2 1288 "eval",
515afda2 1289 "substitution",
515afda2
NC
1290};
1291
76e3520e 1292STATIC I32
5db1eb8d 1293S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags)
a0d0e21e 1294{
97aff369 1295 dVAR;
a0d0e21e 1296 register I32 i;
a0d0e21e 1297
7918f24d
NC
1298 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1299
a0d0e21e 1300 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1301 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1302 switch (CxTYPE(cx)) {
a0d0e21e 1303 case CXt_SUBST:
a0d0e21e 1304 case CXt_SUB:
7766f137 1305 case CXt_FORMAT:
a0d0e21e 1306 case CXt_EVAL:
0a753a76 1307 case CXt_NULL:
dcbac5bb 1308 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1309 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1310 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1311 if (CxTYPE(cx) == CXt_NULL)
1312 return -1;
1313 break;
c6fdafd0 1314 case CXt_LOOP_LAZYIV:
d01136d6 1315 case CXt_LOOP_LAZYSV:
3b719c58
NC
1316 case CXt_LOOP_FOR:
1317 case CXt_LOOP_PLAIN:
7e8f1eac 1318 {
5db1eb8d
BF
1319 STRLEN cx_label_len = 0;
1320 U32 cx_label_flags = 0;
1321 const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags);
1322 if (!cx_label || !(
1323 ( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
1324 (flags & SVf_UTF8)
1325 ? (bytes_cmp_utf8(
1326 (const U8*)cx_label, cx_label_len,
1327 (const U8*)label, len) == 0)
1328 : (bytes_cmp_utf8(
1329 (const U8*)label, len,
1330 (const U8*)cx_label, cx_label_len) == 0)
eade7155
BF
1331 : (len == cx_label_len && ((cx_label == label)
1332 || memEQ(cx_label, label, len))) )) {
1c98cc53 1333 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1334 (long)i, cx_label));
a0d0e21e
LW
1335 continue;
1336 }
1c98cc53 1337 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1338 return i;
7e8f1eac 1339 }
a0d0e21e
LW
1340 }
1341 }
1342 return i;
1343}
1344
0d863452
RH
1345
1346
e50aee73 1347I32
864dbfa3 1348Perl_dowantarray(pTHX)
e50aee73 1349{
97aff369 1350 dVAR;
f54cb97a 1351 const I32 gimme = block_gimme();
54310121
PP
1352 return (gimme == G_VOID) ? G_SCALAR : gimme;
1353}
1354
1355I32
864dbfa3 1356Perl_block_gimme(pTHX)
54310121 1357{
97aff369 1358 dVAR;
06b5626a 1359 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1360 if (cxix < 0)
46fc3d4c 1361 return G_VOID;
e50aee73 1362
54310121 1363 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1364 case G_VOID:
1365 return G_VOID;
54310121 1366 case G_SCALAR:
e50aee73 1367 return G_SCALAR;
54310121
PP
1368 case G_ARRAY:
1369 return G_ARRAY;
1370 default:
cea2e8a9 1371 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
118e2215 1372 assert(0); /* NOTREACHED */
d2719217 1373 return 0;
54310121 1374 }
e50aee73
AD
1375}
1376
78f9721b
SM
1377I32
1378Perl_is_lvalue_sub(pTHX)
1379{
97aff369 1380 dVAR;
06b5626a 1381 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1382 assert(cxix >= 0); /* We should only be called from inside subs */
1383
bafb2adc
NC
1384 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1385 return CxLVAL(cxstack + cxix);
78f9721b
SM
1386 else
1387 return 0;
1388}
1389
777d9014
FC
1390/* only used by PUSHSUB */
1391I32
1392Perl_was_lvalue_sub(pTHX)
1393{
1394 dVAR;
1395 const I32 cxix = dopoptosub(cxstack_ix-1);
1396 assert(cxix >= 0); /* We should only be called from inside subs */
1397
1398 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1399 return CxLVAL(cxstack + cxix);
1400 else
1401 return 0;
1402}
1403
76e3520e 1404STATIC I32
901017d6 1405S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1406{
97aff369 1407 dVAR;
a0d0e21e 1408 I32 i;
7918f24d
NC
1409
1410 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1411
a0d0e21e 1412 for (i = startingblock; i >= 0; i--) {
901017d6 1413 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1414 switch (CxTYPE(cx)) {
a0d0e21e
LW
1415 default:
1416 continue;
1417 case CXt_EVAL:
1418 case CXt_SUB:
7766f137 1419 case CXt_FORMAT:
1c98cc53 1420 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW
1421 return i;
1422 }
1423 }
1424 return i;
1425}
1426
76e3520e 1427STATIC I32
cea2e8a9 1428S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1429{
97aff369 1430 dVAR;
a0d0e21e 1431 I32 i;
a0d0e21e 1432 for (i = startingblock; i >= 0; i--) {
06b5626a 1433 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1434 switch (CxTYPE(cx)) {
a0d0e21e
LW
1435 default:
1436 continue;
1437 case CXt_EVAL:
1c98cc53 1438 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW
1439 return i;
1440 }
1441 }
1442 return i;
1443}
1444
76e3520e 1445STATIC I32
cea2e8a9 1446S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1447{
97aff369 1448 dVAR;
a0d0e21e 1449 I32 i;
a0d0e21e 1450 for (i = startingblock; i >= 0; i--) {
901017d6 1451 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1452 switch (CxTYPE(cx)) {
a0d0e21e 1453 case CXt_SUBST:
a0d0e21e 1454 case CXt_SUB:
7766f137 1455 case CXt_FORMAT:
a0d0e21e 1456 case CXt_EVAL:
0a753a76 1457 case CXt_NULL:
dcbac5bb 1458 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1459 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1460 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1461 if ((CxTYPE(cx)) == CXt_NULL)
1462 return -1;
1463 break;
c6fdafd0 1464 case CXt_LOOP_LAZYIV:
d01136d6 1465 case CXt_LOOP_LAZYSV:
3b719c58
NC
1466 case CXt_LOOP_FOR:
1467 case CXt_LOOP_PLAIN:
1c98cc53 1468 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW
1469 return i;
1470 }
1471 }
1472 return i;
1473}
1474
0d863452
RH
1475STATIC I32
1476S_dopoptogiven(pTHX_ I32 startingblock)
1477{
97aff369 1478 dVAR;
0d863452
RH
1479 I32 i;
1480 for (i = startingblock; i >= 0; i--) {
1481 register const PERL_CONTEXT *cx = &cxstack[i];
1482 switch (CxTYPE(cx)) {
1483 default:
1484 continue;
1485 case CXt_GIVEN:
1c98cc53 1486 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1487 return i;
3b719c58
NC
1488 case CXt_LOOP_PLAIN:
1489 assert(!CxFOREACHDEF(cx));
1490 break;
c6fdafd0 1491 case CXt_LOOP_LAZYIV:
d01136d6 1492 case CXt_LOOP_LAZYSV:
3b719c58 1493 case CXt_LOOP_FOR:
0d863452 1494 if (CxFOREACHDEF(cx)) {
1c98cc53 1495 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH
1496 return i;
1497 }
1498 }
1499 }
1500 return i;
1501}
1502
1503STATIC I32
1504S_dopoptowhen(pTHX_ I32 startingblock)
1505{
97aff369 1506 dVAR;
0d863452
RH
1507 I32 i;
1508 for (i = startingblock; i >= 0; i--) {
1509 register const PERL_CONTEXT *cx = &cxstack[i];
1510 switch (CxTYPE(cx)) {
1511 default:
1512 continue;
1513 case CXt_WHEN:
1c98cc53 1514 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH
1515 return i;
1516 }
1517 }
1518 return i;
1519}
1520
a0d0e21e 1521void
864dbfa3 1522Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1523{
97aff369 1524 dVAR;
a0d0e21e
LW
1525 I32 optype;
1526
f144f1e3
DM
1527 if (!PL_curstackinfo) /* can happen if die during thread cloning */
1528 return;
1529
a0d0e21e 1530 while (cxstack_ix > cxix) {
b0d9ce38 1531 SV *sv;
06b5626a 1532 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1533 DEBUG_CX("UNWIND"); \
a0d0e21e 1534 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1535 switch (CxTYPE(cx)) {
c90c0ff4
PP
1536 case CXt_SUBST:
1537 POPSUBST(cx);
1538 continue; /* not break */
a0d0e21e 1539 case CXt_SUB:
b0d9ce38
GS
1540 POPSUB(cx,sv);
1541 LEAVESUB(sv);
a0d0e21e
LW
1542 break;
1543 case CXt_EVAL:
1544 POPEVAL(cx);
1545 break;
c6fdafd0 1546 case CXt_LOOP_LAZYIV:
d01136d6 1547 case CXt_LOOP_LAZYSV:
3b719c58
NC
1548 case CXt_LOOP_FOR:
1549 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1550 POPLOOP(cx);
1551 break;
0a753a76 1552 case CXt_NULL:
a0d0e21e 1553 break;
7766f137
GS
1554 case CXt_FORMAT:
1555 POPFORMAT(cx);
1556 break;
a0d0e21e 1557 }
c90c0ff4 1558 cxstack_ix--;
a0d0e21e 1559 }
1b6737cc 1560 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1561}
1562
5a844595
GS
1563void
1564Perl_qerror(pTHX_ SV *err)
1565{
97aff369 1566 dVAR;
7918f24d
NC
1567
1568 PERL_ARGS_ASSERT_QERROR;
1569
6b2fb389
DM
1570 if (PL_in_eval) {
1571 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1572 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1573 SVfARG(err));
6b2fb389
DM
1574 }
1575 else
1576 sv_catsv(ERRSV, err);
1577 }
5a844595
GS
1578 else if (PL_errors)
1579 sv_catsv(PL_errors, err);
1580 else
be2597df 1581 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1582 if (PL_parser)
1583 ++PL_parser->error_count;
5a844595
GS
1584}
1585
bb4c52e0 1586void
c5df3096 1587Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1588{
27da23d5 1589 dVAR;
c5df3096 1590 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1591 U8 in_eval = PL_in_eval;
c5df3096 1592 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1593
96d9b9cd 1594 if (in_eval) {
a0d0e21e 1595 I32 cxix;
a0d0e21e 1596 I32 gimme;
a0d0e21e 1597
22a30693
Z
1598 /*
1599 * Historically, perl used to set ERRSV ($@) early in the die
1600 * process and rely on it not getting clobbered during unwinding.
1601 * That sucked, because it was liable to get clobbered, so the
1602 * setting of ERRSV used to emit the exception from eval{} has
1603 * been moved to much later, after unwinding (see just before
1604 * JMPENV_JUMP below). However, some modules were relying on the
1605 * early setting, by examining $@ during unwinding to use it as
1606 * a flag indicating whether the current unwinding was caused by
1607 * an exception. It was never a reliable flag for that purpose,
1608 * being totally open to false positives even without actual
1609 * clobberage, but was useful enough for production code to
1610 * semantically rely on it.
1611 *
1612 * We'd like to have a proper introspective interface that
1613 * explicitly describes the reason for whatever unwinding
1614 * operations are currently in progress, so that those modules
1615 * work reliably and $@ isn't further overloaded. But we don't
1616 * have one yet. In its absence, as a stopgap measure, ERRSV is
1617 * now *additionally* set here, before unwinding, to serve as the
1618 * (unreliable) flag that it used to.
1619 *
1620 * This behaviour is temporary, and should be removed when a
1621 * proper way to detect exceptional unwinding has been developed.
1622 * As of 2010-12, the authors of modules relying on the hack
1623 * are aware of the issue, because the modules failed on
1624 * perls 5.13.{1..7} which had late setting of $@ without this
1625 * early-setting hack.
1626 */
1627 if (!(in_eval & EVAL_KEEPERR)) {
1628 SvTEMP_off(exceptsv);
1629 sv_setsv(ERRSV, exceptsv);
1630 }
1631
5a844595
GS
1632 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1633 && PL_curstackinfo->si_prev)
1634 {
bac4b2ad 1635 dounwind(-1);
d3acc0f7 1636 POPSTACK;
bac4b2ad 1637 }
e336de0d 1638
a0d0e21e
LW
1639 if (cxix >= 0) {
1640 I32 optype;
b6494f15 1641 SV *namesv;
35a4481c 1642 register PERL_CONTEXT *cx;
901017d6 1643 SV **newsp;
8f89e5a9
Z
1644 COP *oldcop;
1645 JMPENV *restartjmpenv;
1646 OP *restartop;
a0d0e21e
LW
1647
1648 if (cxix < cxstack_ix)
1649 dounwind(cxix);
1650
3280af22 1651 POPBLOCK(cx,PL_curpm);
6b35e009 1652 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1653 STRLEN msglen;
96d9b9cd 1654 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1655 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1656 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1657 my_exit(1);
1658 }
1659 POPEVAL(cx);
b6494f15 1660 namesv = cx->blk_eval.old_namesv;
8f89e5a9
Z
1661 oldcop = cx->blk_oldcop;
1662 restartjmpenv = cx->blk_eval.cur_top_env;
1663 restartop = cx->blk_eval.retop;
a0d0e21e
LW
1664
1665 if (gimme == G_SCALAR)
3280af22
NIS
1666 *++newsp = &PL_sv_undef;
1667 PL_stack_sp = newsp;
a0d0e21e
LW
1668
1669 LEAVE;
748a9306 1670
7fb6a879
GS
1671 /* LEAVE could clobber PL_curcop (see save_re_context())
1672 * XXX it might be better to find a way to avoid messing with
1673 * PL_curcop in save_re_context() instead, but this is a more
1674 * minimal fix --GSAR */
8f89e5a9 1675 PL_curcop = oldcop;
7fb6a879 1676
7a2e2cd6 1677 if (optype == OP_REQUIRE) {
b6494f15 1678 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1679 SvPVX_const(namesv),
c60dbbc3 1680 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1681 &PL_sv_undef, 0);
27e90453
DM
1682 /* note that unlike pp_entereval, pp_require isn't
1683 * supposed to trap errors. So now that we've popped the
1684 * EVAL that pp_require pushed, and processed the error
1685 * message, rethrow the error */
ecad31f0
BF
1686 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1687 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1688 SVs_TEMP)));
7a2e2cd6 1689 }
c5df3096 1690 if (in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1691 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1692 SVfARG(exceptsv));
96d9b9cd
Z
1693 }
1694 else {
1695 sv_setsv(ERRSV, exceptsv);
1696 }
8f89e5a9
Z
1697 PL_restartjmpenv = restartjmpenv;
1698 PL_restartop = restartop;
bb4c52e0 1699 JMPENV_JUMP(3);
118e2215 1700 assert(0); /* NOTREACHED */
a0d0e21e
LW
1701 }
1702 }
87582a92 1703
96d9b9cd 1704 write_to_stderr(exceptsv);
f86702cc 1705 my_failure_exit();
118e2215 1706 assert(0); /* NOTREACHED */
a0d0e21e
LW
1707}
1708
1709PP(pp_xor)
1710{
97aff369 1711 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1712 if (SvTRUE(left) != SvTRUE(right))
1713 RETSETYES;
1714 else
1715 RETSETNO;
1716}
1717
8dff4fc5
BM
1718/*
1719=for apidoc caller_cx
1720
1721The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
1722returned C<PERL_CONTEXT> structure can be interrogated to find all the
1723information returned to Perl by C<caller>. Note that XSUBs don't get a
1724stack frame, so C<caller_cx(0, NULL)> will return information for the
1725immediately-surrounding Perl code.
1726
1727This function skips over the automatic calls to C<&DB::sub> made on the
1728behalf of the debugger. If the stack frame requested was a sub called by
1729C<DB::sub>, the return value will be the frame for the call to
1730C<DB::sub>, since that has the correct line number/etc. for the call
1731site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
1732frame for the sub call itself.
1733
1734=cut
1735*/
1736
1737const PERL_CONTEXT *
1738Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1739{
a0d0e21e 1740 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1741 register const PERL_CONTEXT *cx;
1742 register const PERL_CONTEXT *ccstack = cxstack;
1743 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1744
a0d0e21e 1745 for (;;) {
2c375eb9
GS
1746 /* we may be in a higher stacklevel, so dig down deeper */
1747 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1748 top_si = top_si->si_prev;
1749 ccstack = top_si->si_cxstack;
1750 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1751 }
8dff4fc5
BM
1752 if (cxix < 0)
1753 return NULL;
f2a7f298 1754 /* caller() should not report the automatic calls to &DB::sub */
1755 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1756 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1757 count++;
1758 if (!count--)
1759 break;
2c375eb9 1760 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1761 }
2c375eb9
GS
1762
1763 cx = &ccstack[cxix];
8dff4fc5
BM
1764 if (dbcxp) *dbcxp = cx;
1765
7766f137 1766 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1767 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1768 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1769 field below is defined for any cx. */
f2a7f298 1770 /* caller() should not report the automatic calls to &DB::sub */
1771 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1772 cx = &ccstack[dbcxix];
06a5b730
PP
1773 }
1774
8dff4fc5
BM
1775 return cx;
1776}
1777
1778PP(pp_caller)
1779{
1780 dVAR;
1781 dSP;
1782 register const PERL_CONTEXT *cx;
1783 const PERL_CONTEXT *dbcx;
1784 I32 gimme;
d527ce7c 1785 const HEK *stash_hek;
8dff4fc5 1786 I32 count = 0;
ce0b554b 1787 bool has_arg = MAXARG && TOPs;
8dff4fc5 1788
ce0b554b
FC
1789 if (MAXARG) {
1790 if (has_arg)
8dff4fc5 1791 count = POPi;
ce0b554b
FC
1792 else (void)POPs;
1793 }
8dff4fc5 1794
ce0b554b 1795 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5
BM
1796 if (!cx) {
1797 if (GIMME != G_ARRAY) {
1798 EXTEND(SP, 1);
1799 RETPUSHUNDEF;
1800 }
1801 RETURN;
1802 }
1803
fb55feef 1804 DEBUG_CX("CALLER");
d0279c7c 1805 assert(CopSTASH(cx->blk_oldcop));
e7886211
FC
1806 stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV
1807 ? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop))
1808 : NULL;
a0d0e21e 1809 if (GIMME != G_ARRAY) {
27d41816 1810 EXTEND(SP, 1);
d527ce7c 1811 if (!stash_hek)
3280af22 1812 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1813 else {
1814 dTARGET;
d527ce7c 1815 sv_sethek(TARG, stash_hek);
49d8d3a1
MB
1816 PUSHs(TARG);
1817 }
a0d0e21e
LW
1818 RETURN;
1819 }
a0d0e21e 1820
b3ca2e83 1821 EXTEND(SP, 11);
27d41816 1822
d527ce7c 1823 if (!stash_hek)
3280af22 1824 PUSHs(&PL_sv_undef);
d527ce7c
BF
1825 else {
1826 dTARGET;
1827 sv_sethek(TARG, stash_hek);
1828 PUSHTARG;
1829 }
6e449a3a
MHM
1830 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1831 mPUSHi((I32)CopLINE(cx->blk_oldcop));
ce0b554b 1832 if (!has_arg)
a0d0e21e 1833 RETURN;
7766f137 1834 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
8dff4fc5 1835 GV * const cvgv = CvGV(dbcx->blk_sub.cv);
7766f137 1836 /* So is ccstack[dbcxix]. */
81ed78b2 1837 if (cvgv && isGV(cvgv)) {
561b68a9 1838 SV * const sv = newSV(0);
c445ea15 1839 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1840 mPUSHs(sv);
bf38a478 1841 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1842 }
1843 else {
84bafc02 1844 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1845 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1846 }
a0d0e21e
LW
1847 }
1848 else {
84bafc02 1849 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1850 mPUSHi(0);
a0d0e21e 1851 }
54310121
PP
1852 gimme = (I32)cx->blk_gimme;
1853 if (gimme == G_VOID)
3280af22 1854 PUSHs(&PL_sv_undef);
54310121 1855 else
98625aca 1856 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1857 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1858 /* eval STRING */
85a64632 1859 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1860 PUSHs(cx->blk_eval.cur_text);
3280af22 1861 PUSHs(&PL_sv_no);
0f79a09d 1862 }
811a4de9 1863 /* require */
0f79a09d 1864 else if (cx->blk_eval.old_namesv) {
6e449a3a 1865 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1866 PUSHs(&PL_sv_yes);
06a5b730 1867 }
811a4de9
GS
1868 /* eval BLOCK (try blocks have old_namesv == 0) */
1869 else {
1870 PUSHs(&PL_sv_undef);
1871 PUSHs(&PL_sv_undef);
1872 }
4633a7c4 1873 }
a682de96
GS
1874 else {
1875 PUSHs(&PL_sv_undef);
1876 PUSHs(&PL_sv_undef);
1877 }
bafb2adc 1878 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1879 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1880 {
66a1b24b
AL
1881 AV * const ary = cx->blk_sub.argarray;
1882 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1883
e1a80902 1884 Perl_init_dbargs(aTHX);
a0d0e21e 1885
3280af22
NIS
1886 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1887 av_extend(PL_dbargs, AvFILLp(ary) + off);
1888 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1889 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1890 }
f3aa04c2
GS
1891 /* XXX only hints propagated via op_private are currently
1892 * visible (others are not easily accessible, since they
1893 * use the global PL_hints) */
6e449a3a 1894 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1895 {
1896 SV * mask ;
72dc9ed5 1897 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1898
ac27b0f5 1899 if (old_warnings == pWARN_NONE ||
114bafba 1900 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1901 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1902 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1903 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1904 /* Get the bit mask for $warnings::Bits{all}, because
1905 * it could have been extended by warnings::register */
1906 SV **bits_all;
6673a63c 1907 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1908 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1909 mask = newSVsv(*bits_all);
1910 }
1911 else {
1912 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1913 }
1914 }
e476b1b5 1915 else
72dc9ed5 1916 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1917 mPUSHs(mask);
e476b1b5 1918 }
b3ca2e83 1919
c28fe1ec 1920 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 1921 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 1922 : &PL_sv_undef);
a0d0e21e
LW
1923 RETURN;
1924}
1925
a0d0e21e
LW
1926PP(pp_reset)
1927{
97aff369 1928 dVAR;
39644a26 1929 dSP;
f650fa72
FC
1930 const char * const tmps =
1931 (MAXARG < 1 || (!TOPs && !POPs)) ? (const char *)"" : POPpconstx;
11faa288 1932 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1933 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1934 RETURN;
1935}
1936
dd2155a4
DM
1937/* like pp_nextstate, but used instead when the debugger is active */
1938
a0d0e21e
LW
1939PP(pp_dbstate)
1940{
27da23d5 1941 dVAR;
533c011a 1942 PL_curcop = (COP*)PL_op;
a0d0e21e 1943 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1944 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1945 FREETMPS;
1946
f410a211
NC
1947 PERL_ASYNC_CHECK();
1948
5df8de69
DM
1949 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1950 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1951 {
39644a26 1952 dSP;
c09156bb 1953 register PERL_CONTEXT *cx;
f54cb97a 1954 const I32 gimme = G_ARRAY;
eb160463 1955 U8 hasargs;
0bd48802
AL
1956 GV * const gv = PL_DBgv;
1957 register CV * const cv = GvCV(gv);
a0d0e21e 1958
a0d0e21e 1959 if (!cv)
cea2e8a9 1960 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1961
aea4f609
DM
1962 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1963 /* don't do recursive DB::DB call */
a0d0e21e 1964 return NORMAL;
748a9306 1965
a57c6685 1966 ENTER;
4633a7c4
LW
1967 SAVETMPS;
1968
3280af22 1969 SAVEI32(PL_debug);
55497cff 1970 SAVESTACK_POS();
3280af22 1971 PL_debug = 0;
748a9306 1972 hasargs = 0;
924508f0 1973 SPAGAIN;
748a9306 1974
aed2304a 1975 if (CvISXSUB(cv)) {
c127bd3a
SF
1976 CvDEPTH(cv)++;
1977 PUSHMARK(SP);
1978 (void)(*CvXSUB(cv))(aTHX_ cv);
1979 CvDEPTH(cv)--;
1980 FREETMPS;
a57c6685 1981 LEAVE;
c127bd3a
SF
1982 return NORMAL;
1983 }
1984 else {
1985 PUSHBLOCK(cx, CXt_SUB, SP);
1986 PUSHSUB_DB(cx);
1987 cx->blk_sub.retop = PL_op->op_next;
1988 CvDEPTH(cv)++;
1989 SAVECOMPPAD();
1990 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1991 RETURNOP(CvSTART(cv));
1992 }
a0d0e21e
LW
1993 }
1994 else
1995 return NORMAL;
1996}
1997
b9d76716
VP
1998STATIC SV **
1999S_adjust_stack_on_leave(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme, U32 flags)
2000{
9a214eec 2001 bool padtmp = 0;
b9d76716
VP
2002 PERL_ARGS_ASSERT_ADJUST_STACK_ON_LEAVE;
2003
9a214eec
DM
2004 if (flags & SVs_PADTMP) {
2005 flags &= ~SVs_PADTMP;
2006 padtmp = 1;
2007 }
b9d76716
VP
2008 if (gimme == G_SCALAR) {
2009 if (MARK < SP)
9a214eec
DM
2010 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2011 ? *SP : sv_mortalcopy(*SP);
b9d76716
VP
2012 else {
2013 /* MEXTEND() only updates MARK, so reuse it instead of newsp. */
2014 MARK = newsp;
2015 MEXTEND(MARK, 1);
2016 *++MARK = &PL_sv_undef;
2017 return MARK;
2018 }
2019 }
2020 else if (gimme == G_ARRAY) {
2021 /* in case LEAVE wipes old return values */
2022 while (++MARK <= SP) {
9a214eec 2023 if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
b9d76716
VP
2024 *++newsp = *MARK;
2025 else {
2026 *++newsp = sv_mortalcopy(*MARK);
2027 TAINT_NOT; /* Each item is independent */
2028 }
2029 }
2030 /* When this function was called with MARK == newsp, we reach this
2031 * point with SP == newsp. */
2032 }
2033
2034 return newsp;
2035}
2036
2b9a6457
VP
2037PP(pp_enter)
2038{
2039 dVAR; dSP;
2040 register PERL_CONTEXT *cx;
7c2d9d03 2041 I32 gimme = GIMME_V;
2b9a6457
VP
2042
2043 ENTER_with_name("block");
2044
2045 SAVETMPS;
2046 PUSHBLOCK(cx, CXt_BLOCK, SP);
2047
2048 RETURN;
2049}
2050
2051PP(pp_leave)
2052{
2053 dVAR; dSP;
2054 register PERL_CONTEXT *cx;
2055 SV **newsp;
2056 PMOP *newpm;
2057 I32 gimme;
2058
2059 if (PL_op->op_flags & OPf_SPECIAL) {
2060 cx = &cxstack[cxstack_ix];
2061 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2062 }
2063
2064 POPBLOCK(cx,newpm);
2065
2066 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2067
2068 TAINT_NOT;
f02ea43c 2069 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP);
2b9a6457
VP
2070 PL_curpm = newpm; /* Don't pop $1 et al till now */
2071
2072 LEAVE_with_name("block");
2073
2074 RETURN;
2075}
2076
a0d0e21e
LW
2077PP(pp_enteriter)
2078{
27da23d5 2079 dVAR; dSP; dMARK;
c09156bb 2080 register PERL_CONTEXT *cx;
f54cb97a 2081 const I32 gimme = GIMME_V;
df530c37 2082 void *itervar; /* location of the iteration variable */
840fe433 2083 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2084
d343c3ef 2085 ENTER_with_name("loop1");
4633a7c4
LW
2086 SAVETMPS;
2087
aafca525
DM
2088 if (PL_op->op_targ) { /* "my" variable */
2089 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM
2090 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2091 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2092 SVs_PADSTALE, SVs_PADSTALE);
2093 }
09edbca0 2094 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
89e00a7c 2095#ifdef USE_ITHREADS
df530c37 2096 itervar = PL_comppad;
89e00a7c 2097#else
aafca525 2098 itervar = &PAD_SVl(PL_op->op_targ);
7766f137 2099#endif
54b9620d 2100 }
aafca525 2101 else { /* symbol table variable */
159b6efe 2102 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM
2103 SV** svp = &GvSV(gv);
2104 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2105 *svp = newSV(0);
df530c37 2106 itervar = (void *)gv;
54b9620d 2107 }
4633a7c4 2108
0d863452
RH
2109 if (PL_op->op_private & OPpITER_DEF)
2110 cxtype |= CXp_FOR_DEF;
2111
d343c3ef 2112 ENTER_with_name("loop2");
a0d0e21e 2113
7766f137 2114 PUSHBLOCK(cx, cxtype, SP);
df530c37 2115 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2116 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
2117 SV *maybe_ary = POPs;
2118 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2119 dPOPss;
d01136d6 2120 SV * const right = maybe_ary;
984a4bea
RD
2121 SvGETMAGIC(sv);
2122 SvGETMAGIC(right);
4fe3f0fa 2123 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2124 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
2125 cx->cx_type |= CXt_LOOP_LAZYIV;
2126 /* Make sure that no-one re-orders cop.h and breaks our
2127 assumptions */
2128 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040 2129#ifdef NV_PRESERVES_UV
f52e41ad
FC
2130 if ((SvOK(sv) && ((SvNV_nomg(sv) < (NV)IV_MIN) ||
2131 (SvNV_nomg(sv) > (NV)IV_MAX)))
a2309040 2132 ||
f52e41ad
FC
2133 (SvOK(right) && ((SvNV_nomg(right) > (NV)IV_MAX) ||
2134 (SvNV_nomg(right) < (NV)IV_MIN))))
a2309040 2135#else
f52e41ad 2136 if ((SvOK(sv) && ((SvNV_nomg(sv) <= (NV)IV_MIN)
a2309040 2137 ||
f52e41ad
FC
2138 ((SvNV_nomg(sv) > 0) &&
2139 ((SvUV_nomg(sv) > (UV)IV_MAX) ||
2140 (SvNV_nomg(sv) > (NV)UV_MAX)))))
a2309040 2141 ||
f52e41ad 2142 (SvOK(right) && ((SvNV_nomg(right) <= (NV)IV_MIN)
a2309040 2143 ||
f52e41ad
FC
2144 ((SvNV_nomg(right) > 0) &&
2145 ((SvUV_nomg(right) > (UV)IV_MAX) ||
2146 (SvNV_nomg(right) > (NV)UV_MAX))
2147 ))))
a2309040 2148#endif
076d9a11 2149 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
2150 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2151 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM
2152#ifdef DEBUGGING
2153 /* for correct -Dstv display */
2154 cx->blk_oldsp = sp - PL_stack_base;
2155#endif
89ea2908 2156 }
3f63a782 2157 else {
d01136d6
BS
2158 cx->cx_type &= ~CXTYPEMASK;
2159 cx->cx_type |= CXt_LOOP_LAZYSV;
2160 /* Make sure that no-one re-orders cop.h and breaks our
2161 assumptions */
2162 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2163 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2164 cx->blk_loop.state_u.lazysv.end = right;
2165 SvREFCNT_inc(right);
2166 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
2167 /* This will do the upgrade to SVt_PV, and warn if the value
2168 is uninitialised. */
10516c54 2169 (void) SvPV_nolen_const(right);
267cc4a8
NC
2170 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2171 to replace !SvOK() with a pointer to "". */
2172 if (!SvOK(right)) {
2173 SvREFCNT_dec(right);
d01136d6 2174 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2175 }
3f63a782 2176 }
89ea2908 2177 }
d01136d6 2178 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2179 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
2180 SvREFCNT_inc(maybe_ary);
2181 cx->blk_loop.state_u.ary.ix =
2182 (PL_op->op_private & OPpITER_REVERSED) ?
2183 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2184 -1;
ef3e5ea9 2185 }
89ea2908 2186 }
d01136d6
BS
2187 else { /* iterating over items on the stack */
2188 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2189 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2190 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
2191 }
2192 else {
d01136d6 2193 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2194 }
4633a7c4 2195 }
a0d0e21e
LW
2196
2197 RETURN;
2198}
2199
2200PP(pp_enterloop)
2201{
27da23d5 2202 dVAR; dSP;
c09156bb 2203 register PERL_CONTEXT *cx;
f54cb97a 2204 const I32 gimme = GIMME_V;
a0d0e21e 2205
d343c3ef 2206 ENTER_with_name("loop1");
a0d0e21e 2207 SAVETMPS;
d343c3ef 2208 ENTER_with_name("loop2");
a0d0e21e 2209
3b719c58
NC
2210 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2211 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2212
2213 RETURN;
2214}
2215
2216PP(pp_leaveloop)
2217{
27da23d5 2218 dVAR; dSP;
c09156bb 2219 register PERL_CONTEXT *cx;
a0d0e21e
LW
2220 I32 gimme;
2221 SV **newsp;
2222 PMOP *newpm;
2223 SV **mark;
2224
2225 POPBLOCK(cx,newpm);
3b719c58 2226 assert(CxTYPE_is_LOOP(cx));
4fdae800 2227 mark = newsp;
a8bba7fa 2228 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2229
a1f49e72 2230 TAINT_NOT;
b9d76716 2231 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme, 0);
f86702cc
PP
2232 PUTBACK;
2233
a8bba7fa 2234 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2235 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2236
d343c3ef
GG
2237 LEAVE_with_name("loop2");
2238 LEAVE_with_name("loop1");
a0d0e21e 2239
f86702cc 2240 return NORMAL;
a0d0e21e
LW
2241}
2242
3bdf583b
FC
2243STATIC void
2244S_return_lvalues(pTHX_ SV **mark, SV **sp, SV **newsp, I32 gimme,
d25b0d7b 2245 PERL_CONTEXT *cx, PMOP *newpm)
3bdf583b 2246{
80422e24 2247 const bool ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2248 if (gimme == G_SCALAR) {
d25b0d7b
FC
2249 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2250 SV *sv;
001de122 2251 const char *what = NULL;
d25b0d7b
FC
2252 if (MARK < SP) {
2253 assert(MARK+1 == SP);
2254 if ((SvPADTMP(TOPs) ||
2255 (SvFLAGS(TOPs) & (SVf_READONLY | SVf_FAKE))
2256 == SVf_READONLY
2257 ) &&
2258 !SvSMAGICAL(TOPs)) {
001de122 2259 what =
d25b0d7b 2260 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2261 : "a readonly value" : "a temporary";
d25b0d7b 2262 }
001de122 2263 else goto copy_sv;
d25b0d7b
FC
2264 }
2265 else {
2266 /* sub:lvalue{} will take us here. */
001de122 2267 what = "undef";
d25b0d7b 2268 }
001de122
FC
2269 LEAVE;
2270 cxstack_ix--;
2271 POPSUB(cx,sv);
2272 PL_curpm = newpm;
2273 LEAVESUB(sv);
2274 Perl_croak(aTHX_
2275 "Can't return %s from lvalue subroutine", what
2276 );
d25b0d7b 2277 }
93905212 2278 if (MARK < SP) {
a5ad7a5a 2279 copy_sv:
3bdf583b 2280 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
5811c07e 2281 if (!SvPADTMP(*SP)) {
3bdf583b
FC
2282 *++newsp = SvREFCNT_inc(*SP);
2283 FREETMPS;
2284 sv_2mortal(*newsp);
5811c07e
FC
2285 }
2286 else {
2287 /* FREETMPS could clobber it */
2288 SV *sv = SvREFCNT_inc(*SP);
2289 FREETMPS;
2290 *++newsp = sv_mortalcopy(sv);
2291 SvREFCNT_dec(sv);
2292 }
3bdf583b
FC
2293 }
2294 else
e08be60b 2295 *++newsp =
5811c07e
FC
2296 SvPADTMP(*SP)
2297 ? sv_mortalcopy(*SP)
2298 : !SvTEMP(*SP)
e08be60b
FC
2299 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2300 : *SP;
3bdf583b 2301 }
0d235c77
FC
2302 else {
2303 EXTEND(newsp,1);
3bdf583b 2304 *++newsp = &PL_sv_undef;
0d235c77 2305 }
0e9700df 2306 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC
2307 SvGETMAGIC(TOPs);
2308 if (!SvOK(TOPs)) {
0e9700df 2309 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC
2310 }
2311 }
3bdf583b
FC
2312 }
2313 else if (gimme == G_ARRAY) {
0e9700df 2314 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2315 if (ref || !CxLVAL(cx))
e08be60b
FC
2316 while (++MARK <= SP)
2317 *++newsp =
5811c07e 2318 SvFLAGS(*MARK) & SVs_PADTMP
80422e24 2319 ? sv_mortalcopy(*MARK)
5811c07e
FC
2320 : SvTEMP(*MARK)
2321 ? *MARK
80422e24 2322 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e08be60b 2323 else while (++MARK <= SP) {
d25b0d7b
FC
2324 if (*MARK != &PL_sv_undef
2325 && (SvPADTMP(*MARK)
2326 || (SvFLAGS(*MARK) & (SVf_READONLY|SVf_FAKE))
2327 == SVf_READONLY
2328 )
2329 ) {
2330 SV *sv;
2331 /* Might be flattened array after $#array = */
2332 PUTBACK;
2333 LEAVE;
2334 cxstack_ix--;
2335 POPSUB(cx,sv);
2336 PL_curpm = newpm;
2337 LEAVESUB(sv);
ae917476 2338 /* diag_listed_as: Can't return %s from lvalue subroutine */
d25b0d7b
FC
2339 Perl_croak(aTHX_
2340 "Can't return a %s from lvalue subroutine",
2341 SvREADONLY(TOPs) ? "readonly value" : "temporary");
2342 }
2343 else
4bee03f8
FC
2344 *++newsp =
2345 SvTEMP(*MARK)
2346 ? *MARK
2347 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC
2348 }
2349 }
2350 PL_stack_sp = newsp;
2351}
2352
a0d0e21e
LW
2353PP(pp_return)
2354{
27da23d5 2355 dVAR; dSP; dMARK;
c09156bb 2356 register PERL_CONTEXT *cx;
f86702cc 2357 bool popsub2 = FALSE;
b45de488 2358 bool clear_errsv = FALSE;
fa1e92c4 2359 bool lval = FALSE;
a0d0e21e
LW
2360 I32 gimme;
2361 SV **newsp;
2362 PMOP *newpm;
2363 I32 optype = 0;
b6494f15 2364 SV *namesv;
b0d9ce38 2365 SV *sv;
b263a1ad 2366 OP *retop = NULL;
a0d0e21e 2367
0bd48802
AL
2368 const I32 cxix = dopoptosub(cxstack_ix);
2369
9850bf21
RH
2370 if (cxix < 0) {
2371 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2372 * sort block, which is a CXt_NULL
2373 * not a CXt_SUB */
2374 dounwind(0);
d7507f74
RH
2375 PL_stack_base[1] = *PL_stack_sp;
2376 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2377 return 0;
2378 }
9850bf21
RH
2379 else
2380 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2381 }
a0d0e21e
LW
2382 if (cxix < cxstack_ix)
2383 dounwind(cxix);
2384
d7507f74
RH
2385 if (CxMULTICALL(&cxstack[cxix])) {
2386 gimme = cxstack[cxix].blk_gimme;
2387 if (gimme == G_VOID)
2388 PL_stack_sp = PL_stack_base;
2389 else if (gimme == G_SCALAR) {
2390 PL_stack_base[1] = *PL_stack_sp;
2391 PL_stack_sp = PL_stack_base + 1;
2392 }
9850bf21 2393 return 0;
d7507f74 2394 }
9850bf21 2395
a0d0e21e 2396 POPBLOCK(cx,newpm);
6b35e009 2397 switch (CxTYPE(cx)) {
a0d0e21e 2398 case CXt_SUB:
f86702cc 2399 popsub2 = TRUE;
fa1e92c4 2400 lval = !!CvLVALUE(cx->blk_sub.cv);
f39bc417 2401 retop = cx->blk_sub.retop;
5dd42e15 2402 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2403 break;
2404 case CXt_EVAL:
b45de488
GS
2405 if (!(PL_in_eval & EVAL_KEEPERR))
2406 clear_errsv = TRUE;
a0d0e21e 2407 POPEVAL(cx);
b6494f15 2408 namesv = cx->blk_eval.old_namesv;
f39bc417 2409 retop = cx->blk_eval.retop;
1d76a5c3
GS
2410 if (CxTRYBLOCK(cx))
2411 break;
748a9306
LW
2412 if (optype == OP_REQUIRE &&
2413 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2414 {
54310121 2415 /* Unassume the success we assumed earlier. */
b6494f15 2416 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 2417 SvPVX_const(namesv),
c60dbbc3 2418 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15
VP
2419 G_DISCARD);
2420 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
748a9306 2421 }
a0d0e21e 2422 break;
7766f137
GS
2423 case CXt_FORMAT:
2424 POPFORMAT(cx);
f39bc417 2425 retop = cx->blk_sub.retop;
7766f137 2426 break;
a0d0e21e 2427 default:
5637ef5b 2428 DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW
2429 }
2430
a1f49e72 2431 TAINT_NOT;
d25b0d7b 2432 if (lval) S_return_lvalues(aTHX_ MARK, SP, newsp, gimme, cx, newpm);
3bdf583b
FC
2433 else {
2434 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2435 if (MARK < SP) {
2436 if (popsub2) {
a8bba7fa 2437 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
6f48390a
FC
2438 if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1
2439 && !SvMAGICAL(TOPs)) {
a29cdaf0
IZ
2440 *++newsp = SvREFCNT_inc(*SP);
2441 FREETMPS;
2442 sv_2mortal(*newsp);
959e3673
GS
2443 }
2444 else {
2445 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2446 FREETMPS;
959e3673
GS
2447 *++newsp = sv_mortalcopy(sv);
2448 SvREFCNT_dec(sv);
a29cdaf0 2449 }
959e3673 2450 }
6f48390a
FC
2451 else if (SvTEMP(*SP) && SvREFCNT(*SP) == 1
2452 && !SvMAGICAL(*SP)) {
767eda44 2453 *++newsp = *SP;
767eda44 2454 }
959e3673 2455 else
767eda44 2456 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2457 }
2458 else
a29cdaf0 2459 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2460 }
2461 else
3280af22 2462 *++newsp = &PL_sv_undef;
3bdf583b
FC
2463 }
2464 else if (gimme == G_ARRAY) {
a1f49e72 2465 while (++MARK <= SP) {
3ed94dc0 2466 *++newsp = popsub2 && SvTEMP(*MARK) && SvREFCNT(*MARK) == 1
6f48390a 2467 && !SvGMAGICAL(*MARK)
f86702cc 2468 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2469 TAINT_NOT; /* Each item is independent */
2470 }
3bdf583b
FC
2471 }
2472 PL_stack_sp = newsp;
a0d0e21e 2473 }
a0d0e21e 2474
5dd42e15 2475 LEAVE;
f86702cc
PP
2476 /* Stack values are safe: */
2477 if (popsub2) {
5dd42e15 2478 cxstack_ix--;
b0d9ce38 2479 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2480 }
b0d9ce38 2481 else
c445ea15 2482 sv = NULL;
3280af22 2483 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2484
b0d9ce38 2485 LEAVESUB(sv);
8433848b 2486 if (clear_errsv) {
ab69dbc2 2487 CLEAR_ERRSV();
8433848b 2488 }
f39bc417 2489 return retop;
a0d0e21e
LW
2490}
2491
4f443c3d
FC
2492/* This duplicates parts of pp_leavesub, so that it can share code with
2493 * pp_return */
2494PP(pp_leavesublv)
2495{
2496 dVAR; dSP;
4f443c3d
FC
2497 SV **newsp;
2498 PMOP *newpm;
2499 I32 gimme;
2500 register PERL_CONTEXT *cx;
2501 SV *sv;
2502
2503 if (CxMULTICALL(&cxstack[cxstack_ix]))
2504 return 0;
2505
2506 POPBLOCK(cx,newpm);
2507 cxstack_ix++; /* temporarily protect top context */
4f443c3d
FC
2508
2509 TAINT_NOT;
2510
0d235c77 2511 S_return_lvalues(aTHX_ newsp, SP, newsp, gimme, cx, newpm);
4f443c3d
FC
2512
2513 LEAVE;
2514 cxstack_ix--;
2515 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
2516 PL_curpm = newpm; /* ... and pop $1 et al */
2517
2518 LEAVESUB(sv);
2519 return cx->blk_sub.retop;
2520}
2521
1f039d60
FC
2522static I32
2523S_unwind_loop(pTHX_ const char * const opname)
a0d0e21e 2524{
1f039d60 2525 dVAR;
a0d0e21e 2526 I32 cxix;
1f039d60
FC
2527 if (PL_op->op_flags & OPf_SPECIAL) {
2528 cxix = dopoptoloop(cxstack_ix);
2529 if (cxix < 0)
2530 /* diag_listed_as: Can't "last" outside a loop block */
2531 Perl_croak(aTHX_ "Can't \"%s\" outside a loop block", opname);
2532 }
2533 else {
2534 dSP;
2535 STRLEN label_len;
2536 const char * const label =
2537 PL_op->op_flags & OPf_STACKED
2538 ? SvPV(TOPs,label_len)
2539 : (label_len = strlen(cPVOP->op_pv), cPVOP->op_pv);
2540 const U32 label_flags =
2541 PL_op->op_flags & OPf_STACKED
2542 ? SvUTF8(POPs)
2543 : (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2544 PUTBACK;
2545 cxix = dopoptolabel(label, label_len, label_flags);
2546 if (cxix < 0)
2547 /* diag_listed_as: Label not found for "last %s" */
2548 Perl_croak(aTHX_ "Label not found for \"%s %"SVf"\"",
2549 opname,
2550 SVfARG(PL_op->op_flags & OPf_STACKED
2551 && !SvGMAGICAL(TOPp1s)
2552 ? TOPp1s
2553 : newSVpvn_flags(label,
2554 label_len,
2555 label_flags | SVs_TEMP)));
2556 }
2557 if (cxix < cxstack_ix)
2558 dounwind(cxix);
2559 return cxix;
2560}
2561
2562PP(pp_last)
2563{
2564 dVAR;
c09156bb 2565 register PERL_CONTEXT *cx;
f86702cc 2566 I32 pop2 = 0;
a0d0e21e 2567 I32 gimme;
8772537c 2568 I32 optype;
b263a1ad 2569 OP *nextop = NULL;
a0d0e21e
LW
2570 SV **newsp;
2571 PMOP *newpm;
a8bba7fa 2572 SV **mark;
c445ea15 2573 SV *sv = NULL;
9d4ba2ae 2574
1f039d60 2575 S_unwind_loop(aTHX_ "last");
a0d0e21e
LW
2576
2577 POPBLOCK(cx,newpm);
5dd42e15 2578 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2579 mark = newsp;
6b35e009 2580 switch (CxTYPE(cx)) {
c6fdafd0 2581 case CXt_LOOP_LAZYIV:
d01136d6 2582 case CXt_LOOP_LAZYSV:
3b719c58
NC
2583 case CXt_LOOP_FOR:
2584 case CXt_LOOP_PLAIN:
2585 pop2 = CxTYPE(cx);
a8bba7fa 2586 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2587 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2588 break;
f86702cc 2589 case CXt_SUB:
f86702cc 2590 pop2 = CXt_SUB;
f39bc417 2591 nextop = cx->blk_sub.retop;
a0d0e21e 2592 break;
f86702cc
PP
2593 case CXt_EVAL:
2594 POPEVAL(cx);
f39bc417 2595 nextop = cx->blk_eval.retop;
a0d0e21e 2596 break;
7766f137
GS
2597 case CXt_FORMAT:
2598 POPFORMAT(cx);
f39bc417 2599 nextop = cx->blk_sub.retop;
7766f137 2600 break;
a0d0e21e 2601 default:
5637ef5b 2602 DIE(aTHX_ "panic: last, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW
2603 }
2604
a1f49e72 2605 TAINT_NOT;
1f039d60 2606 PL_stack_sp = adjust_stack_on_leave(newsp, PL_stack_sp, MARK, gimme,
b9d76716 2607 pop2 == CXt_SUB ? SVs_TEMP : 0);
f86702cc 2608
5dd42e15
DM
2609 LEAVE;
2610 cxstack_ix--;
f86702cc
PP
2611 /* Stack values are safe: */
2612 switch (pop2) {
c6fdafd0 2613 case CXt_LOOP_LAZYIV:
3b719c58 2614 case CXt_LOOP_PLAIN:
d01136d6 2615 case CXt_LOOP_LAZYSV:
3b719c58 2616 case CXt_LOOP_FOR:
a8bba7fa 2617 POPLOOP(cx); /* release loop vars ... */
4fdae800 2618 LEAVE;
f86702cc
PP
2619 break;
2620 case CXt_SUB:
b0d9ce38 2621 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2622 break;
a0d0e21e 2623 }
3280af22 2624 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2625
b0d9ce38 2626 LEAVESUB(sv);
9d4ba2ae
AL
2627 PERL_UNUSED_VAR(optype);
2628 PERL_UNUSED_VAR(gimme);
f86702cc 2629 return nextop;
a0d0e21e
LW
2630}
2631
2632PP(pp_next)
2633{
27da23d5 2634 dVAR;
c09156bb 2635 register PERL_CONTEXT *cx;
1f039d60 2636 const I32 inner = PL_scopestack_ix;
a0d0e21e 2637
1f039d60 2638 S_unwind_loop(aTHX_ "next");
a0d0e21e 2639
85538317
GS
2640 /* clear off anything above the scope we're re-entering, but
2641 * save the rest until after a possible continue block */
1ba6ee2b 2642 TOPBLOCK(cx);
85538317
GS
2643 if (PL_scopestack_ix < inner)
2644 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2645 PL_curcop = cx->blk_oldcop;
d57ce4df 2646 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW
2647}
2648
2649PP(pp_redo)
2650{
27da23d5 2651 dVAR;
1f039d60 2652 const I32 cxix = S_unwind_loop(aTHX_ "redo");
c09156bb 2653 register PERL_CONTEXT *cx;
a0d0e21e 2654 I32 oldsave;
1f039d60 2655 OP* redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a0d0e21e 2656
a034e688
DM
2657 if (redo_op->op_type == OP_ENTER) {
2658 /* pop one less context to avoid $x being freed in while (my $x..) */
2659 cxstack_ix++;
2660 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2661 redo_op = redo_op->op_next;
2662 }
2663
a0d0e21e 2664 TOPBLOCK(cx);
3280af22 2665 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2666 LEAVE_SCOPE(oldsave);
936c78b5 2667 FREETMPS;
3a1b2b9e 2668 PL_curcop = cx->blk_oldcop;
a034e688 2669 return redo_op;
a0d0e21e
LW
2670}
2671
0824fdcb 2672STATIC OP *
5db1eb8d 2673S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit)
a0d0e21e 2674{
97aff369 2675 dVAR;
a0d0e21e 2676 OP **ops = opstack;
bfed75c6 2677 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2678
7918f24d
NC
2679 PERL_ARGS_ASSERT_DOFINDLABEL;
2680
fc36a67e 2681 if (ops >= oplimit)
cea2e8a9 2682 Perl_croak(aTHX_ too_deep);
11343788
MB
2683 if (o->op_type == OP_LEAVE ||
2684 o->op_type == OP_SCOPE ||
2685 o->op_type == OP_LEAVELOOP ||
33d34e4c 2686 o->op_type == OP_LEAVESUB ||
11343788 2687 o->op_type == OP_LEAVETRY)
fc36a67e 2688 {
5dc0d613 2689 *ops++ = cUNOPo->op_first;
fc36a67e 2690 if (ops >= oplimit)
cea2e8a9 2691 Perl_croak(aTHX_ too_deep);
fc36a67e 2692 }
c4aa4e48 2693 *ops = 0;
11343788 2694 if (o->op_flags & OPf_KIDS) {
aec46f14 2695 OP *kid;
a0d0e21e 2696 /* First try all the kids at this level, since that's likeliest. */
11343788 2697 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac 2698 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
5db1eb8d
BF
2699 STRLEN kid_label_len;
2700 U32 kid_label_flags;
2701 const char *kid_label = CopLABEL_len_flags(kCOP,
2702 &kid_label_len, &kid_label_flags);
2703 if (kid_label && (
2704 ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
2705 (flags & SVf_UTF8)
2706 ? (bytes_cmp_utf8(
2707 (const U8*)kid_label, kid_label_len,
2708 (const U8*)label, len) == 0)
2709 : (bytes_cmp_utf8(
2710 (const U8*)label, len,
2711 (const U8*)kid_label, kid_label_len) == 0)
eade7155
BF
2712 : ( len == kid_label_len && ((kid_label == label)
2713 || memEQ(kid_label, label, len)))))
7e8f1eac
AD
2714 return kid;
2715 }
a0d0e21e 2716 }
11343788 2717 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2718 if (kid == PL_lastgotoprobe)
a0d0e21e 2719 continue;
ed8d0fe2
SM
2720 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2721 if (ops == opstack)
2722 *ops++ = kid;
2723 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2724 ops[-1]->op_type == OP_DBSTATE)
2725 ops[-1] = kid;
2726 else
2727 *ops++ = kid;
2728 }
5db1eb8d 2729 if ((o = dofindlabel(kid, label, len, flags, ops, oplimit)))
11343788 2730 return o;
a0d0e21e
LW
2731 }
2732 }
c4aa4e48 2733 *ops = 0;
a0d0e21e
LW
2734 return 0;
2735}
2736
a0d0e21e
LW
2737PP(pp_goto)
2738{
27da23d5 2739 dVAR; dSP;
cbbf8932 2740 OP *retop = NULL;
a0d0e21e 2741 I32 ix;
c09156bb 2742 register PERL_CONTEXT *cx;
fc36a67e
PP
2743#define GOTO_DEPTH 64
2744 OP *enterops[GOTO_DEPTH];
cbbf8932 2745 const char *label = NULL;
5db1eb8d
BF
2746 STRLEN label_len = 0;
2747 U32 label_flags = 0;
bfed75c6
AL
2748 const bool do_dump = (PL_op->op_type == OP_DUMP);
2749 static const char must_have_label[] = "goto must have label";
a0d0e21e 2750
533c011a 2751 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2752 SV * const sv = POPs;
a0d0e21e
LW
2753
2754 /* This egregious kludge implements goto &subroutine */
2755 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2756 I32 cxix;
c09156bb 2757 register PERL_CONTEXT *cx;
ea726b52 2758 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW
2759 SV** mark;
2760 I32 items = 0;
2761 I32 oldsave;
b1464ded 2762 bool reified = 0;
a0d0e21e 2763
e8f7dd13 2764 retry:
4aa0a1f7 2765 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2766 const GV * const gv = CvGV(cv);
e8f7dd13 2767 if (gv) {
7fc63493 2768 GV *autogv;
e8f7dd13
GS
2769 SV *tmpstr;
2770 /* autoloaded stub? */
2771 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2772 goto retry;
c271df94
BF
2773 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2774 GvNAMELEN(gv),
2775 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS
2776 if (autogv && (cv = GvCV(autogv)))
2777 goto retry;
2778 tmpstr = sv_newmortal();
c445ea15 2779 gv_efullname3(tmpstr, gv, NULL);
be2597df 2780 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2781 }
cea2e8a9 2782 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2783 }
2784
a0d0e21e 2785 /* First do some returnish stuff. */
b37c2d43 2786 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2787 FREETMPS;
a0d0e21e
LW
2788 cxix = dopoptosub(cxstack_ix);
2789 if (cxix < 0)
cea2e8a9 2790 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2791 if (cxix < cxstack_ix)
2792 dounwind(cxix);
2793 TOPBLOCK(cx);
2d43a17f 2794 SPAGAIN;
564abe23 2795 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2796 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89 2797 if (CxREALEVAL(cx))
00455a92 2798 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89
DM
2799 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2800 else
00455a92 2801 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89 2802 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2803 }
9850bf21
RH
2804 else if (CxMULTICALL(cx))
2805 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2806 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2807 /* put @_ back onto stack */
a0d0e21e 2808 AV* av = cx->blk_sub.argarray;
bfed75c6 2809
93965878 2810 items = AvFILLp(av) + 1;
a45cdc79
DM
2811 EXTEND(SP, items+1); /* @_ could have been extended. */
2812 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2813 SvREFCNT_dec(GvAV(PL_defgv));
2814 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2815 CLEAR_ARGARRAY(av);
d8b46c1b 2816 /* abandon @_ if it got reified */
62b1ebc2 2817 if (AvREAL(av)) {
b1464ded
DM
2818 reified = 1;
2819 SvREFCNT_dec(av);
d8b46c1b
GS
2820 av = newAV();
2821 av_extend(av, items-1);
11ca45c0 2822 AvREIFY_only(av);
ad64d0ec 2823 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2824 }
a0d0e21e 2825 }
aed2304a 2826 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2827 AV* const av = GvAV(PL_defgv);
1fa4e549 2828 items = AvFILLp(av) + 1;
a45cdc79
DM
2829 EXTEND(SP, items+1); /* @_ could have been extended. */
2830 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2831 }
a45cdc79
DM
2832 mark = SP;
2833 SP += items;
6b35e009 2834 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2835 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2836 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2837 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2838 LEAVE_SCOPE(oldsave);
2839
1d59c038
FC
2840 /* A destructor called during LEAVE_SCOPE could have undefined
2841 * our precious cv. See bug #99850. */
2842 if (!CvROOT(cv) && !CvXSUB(cv)) {
2843 const GV * const gv = CvGV(cv);
2844 if (gv) {
2845 SV * const tmpstr = sv_newmortal();
2846 gv_efullname3(tmpstr, gv, NULL);
2847 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",
2848 SVfARG(tmpstr));
2849 }
2850 DIE(aTHX_ "Goto undefined subroutine");
2851 }
2852
a0d0e21e
LW
2853 /* Now do some callish stuff. */
2854 SAVETMPS;
5023d17a 2855 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2856 if (CvISXSUB(cv)) {
b37c2d43 2857 OP* const retop = cx->blk_sub.retop;
9d63fa07
KW
2858 SV **newsp PERL_UNUSED_DECL;
2859 I32 gimme PERL_UNUSED_DECL;
b1464ded
DM
2860 if (reified) {
2861 I32 index;
2862 for (index=0; index<items; index++)
2863 sv_2mortal(SP[-index]);
2864 }
1fa4e549 2865
b37c2d43
AL
2866 /* XS subs don't have a CxSUB, so pop it */
2867 POPBLOCK(cx, PL_curpm);
2868 /* Push a mark for the start of arglist */
2869 PUSHMARK(mark);
2870 PUTBACK;
2871 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2872 LEAVE;
5eff7df7 2873 return retop;
a0d0e21e
LW
2874 }
2875 else {
b37c2d43 2876 AV* const padlist = CvPADLIST(cv);
6b35e009 2877 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2878 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2879 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2880 cx->cx_type = CXt_SUB;
b150fb22 2881 }
a0d0e21e 2882 cx->blk_sub.cv = cv;
1a5b3db4 2883 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2884
a0d0e21e
LW
2885 CvDEPTH(cv)++;
2886 if (CvDEPTH(cv) < 2)
74c765eb 2887 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2888 else {
2b9dff67 2889 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2890 sub_crush_depth(cv);
26019298 2891 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2892 }
426a09cd 2893 PL_curcop = cx->blk_oldcop;
fd617465
DM
2894 SAVECOMPPAD();
2895 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2896 if (CxHASARGS(cx))
6d4ff0d2 2897 {
502c6561 2898 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2899
3280af22 2900 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2901 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2902 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2903 cx->blk_sub.argarray = av;
a0d0e21e
LW
2904
2905 if (items >= AvMAX(av) + 1) {
b37c2d43 2906 SV **ary = AvALLOC(av);
a0d0e21e
LW
2907 if (AvARRAY(av) != ary) {
2908 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2909 AvARRAY(av) = ary;
a0d0e21e
LW
2910 }
2911 if (items >= AvMAX(av) + 1) {
2912 AvMAX(av) = items - 1;
2913 Renew(ary,items+1,SV*);
2914 AvALLOC(av) = ary;
9c6bc640 2915 AvARRAY(av) = ary;
a0d0e21e
LW
2916 }
2917 }
a45cdc79 2918 ++mark;
a0d0e21e 2919 Copy(mark,AvARRAY(av),items,SV*);
93965878 2920 AvFILLp(av) = items - 1;
d8b46c1b 2921 assert(!AvREAL(av));
b1464ded
DM
2922 if (reified) {
2923 /* transfer 'ownership' of refcnts to new @_ */
2924 AvREAL_on(av);
2925 AvREIFY_off(av);
2926 }
a0d0e21e
LW
2927 while (items--) {
2928 if (*mark)
2929 SvTEMP_off(*mark);
2930 mark++;
2931 }
2932 }
491527d0 2933 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2934 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2935 if (PERLDB_GOTO) {
b96d8cd9 2936 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2937 if (gotocv) {
2938 PUSHMARK( PL_stack_sp );
ad64d0ec 2939 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2940 PL_stack_sp--;
2941 }
491527d0 2942 }
1ce6579f 2943 }
a0d0e21e
LW
2944 RETURNOP(CvSTART(cv));
2945 }
2946 }
1614b0e3 2947 else {
5db1eb8d
BF
2948 label = SvPV_const(sv, label_len);
2949 label_flags = SvUTF8(sv);
1614b0e3 2950 }
a0d0e21e 2951 }
2fc690dc 2952 else if (!(PL_op->op_flags & OPf_SPECIAL)) {
5db1eb8d
BF
2953 label = cPVOP->op_pv;
2954 label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2955 label_len = strlen(label);
2956 }
2fc690dc 2957 if (!(do_dump || label_len)) DIE(aTHX_ must_have_label);
a0d0e21e 2958
f410a211
NC
2959 PERL_ASYNC_CHECK();
2960
3532f34a 2961 if (label_len) {
cbbf8932 2962 OP *gotoprobe = NULL;
3b2447bc 2963 bool leaving_eval = FALSE;
33d34e4c 2964 bool in_block = FALSE;
cbbf8932 2965 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2966
2967 /* find label */
2968
d4c19fe8 2969 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2970 *enterops = 0;
2971 for (ix = cxstack_ix; ix >= 0; ix--) {
2972 cx = &cxstack[ix];
6b35e009 2973 switch (CxTYPE(cx)) {
a0d0e21e 2974 case CXt_EVAL:
3b2447bc 2975 leaving_eval = TRUE;
971ecbe6 2976 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2977 gotoprobe = (last_eval_cx ?
2978 last_eval_cx->blk_eval.old_eval_root :
2979 PL_eval_root);
2980 last_eval_cx = cx;
9c5794fe
RH
2981 break;
2982 }
2983 /* else fall through */
c6fdafd0 2984 case CXt_LOOP_LAZYIV:
d01136d6 2985 case CXt_LOOP_LAZYSV:
3b719c58
NC
2986 case CXt_LOOP_FOR:
2987 case CXt_LOOP_PLAIN:
bb5aedc1
VP
2988 case CXt_GIVEN:
2989 case CXt_WHEN:
a0d0e21e
LW
2990 gotoprobe = cx->blk_oldcop->op_sibling;
2991 break;
2992 case CXt_SUBST:
2993 continue;
2994 case CXt_BLOCK:
33d34e4c 2995 if (ix) {
a0d0e21e 2996 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2997 in_block = TRUE;
2998 } else
3280af22 2999 gotoprobe = PL_main_root;
a0d0e21e 3000 break;
b3933176 3001 case CXt_SUB:
9850bf21 3002 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
3003 gotoprobe = CvROOT(cx->blk_sub.cv);
3004 break;
3005 }
3006 /* FALL THROUGH */
7766f137 3007 case CXt_FORMAT:
0a753a76 3008 case CXt_NULL:
a651a37d 3009 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
3010 default:
3011 if (ix)
5637ef5b
NC
3012 DIE(aTHX_ "panic: goto, type=%u, ix=%ld",
3013 CxTYPE(cx), (long) ix);
3280af22 3014 gotoprobe = PL_main_root;
a0d0e21e
LW
3015 break;
3016 }
2b597662 3017 if (gotoprobe) {
5db1eb8d 3018 retop = dofindlabel(gotoprobe, label, label_len, label_flags,
2b597662
GS
3019 enterops, enterops + GOTO_DEPTH);
3020 if (retop)
3021 break;
eae48c89
Z
3022 if (gotoprobe->op_sibling &&
3023 gotoprobe->op_sibling->op_type == OP_UNSTACK &&
3024 gotoprobe->op_sibling->op_sibling) {
3025 retop = dofindlabel(gotoprobe->op_sibling->op_sibling,
5db1eb8d
BF
3026 label, label_len, label_flags, enterops,
3027 enterops + GOTO_DEPTH);
eae48c89
Z
3028 if (retop)
3029 break;
3030 }
2b597662 3031 }
3280af22 3032 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
3033 }
3034 if (!retop)
5db1eb8d
BF
3035 DIE(aTHX_ "Can't find label %"SVf,
3036 SVfARG(newSVpvn_flags(label, label_len,
3037 SVs_TEMP | label_flags)));
a0d0e21e 3038
3b2447bc
RH
3039 /* if we're leaving an eval, check before we pop any frames
3040 that we're not going to punt, otherwise the error
3041 won't be caught */
3042
3043 if (leaving_eval && *enterops && enterops[1]) {
3044 I32 i;
3045 for (i = 1; enterops[i]; i++)
3046 if (enterops[i]->op_type == OP_ENTERITER)
3047 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
3048 }
3049
b500e03b
GG
3050 if (*enterops && enterops[1]) {
3051 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3052 if (enterops[i])
3053 deprecate("\"goto\" to jump into a construct");
3054 }
3055
a0d0e21e
LW
3056 /* pop unwanted frames */
3057
3058 if (ix < cxstack_ix) {
3059 I32 oldsave;
3060
3061 if (ix < 0)
3062 ix = 0;
3063 dounwind(ix);
3064 TOPBLOCK(cx);
3280af22 3065 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
3066 LEAVE_SCOPE(oldsave);
3067 }
3068
3069 /* push wanted frames */
3070
748a9306 3071 if (*enterops && enterops[1]) {
0bd48802 3072 OP * const oldop = PL_op;
33d34e4c
AE
3073 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3074 for (; enterops[ix]; ix++) {
533c011a 3075 PL_op = enterops[ix];
84902520
TB
3076 /* Eventually we may want to stack the needed arguments
3077 * for each op. For now, we punt on the hard ones. */
533c011a 3078 if (PL_op->op_type == OP_ENTERITER)
894356b3 3079 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3080 PL_op->op_ppaddr(aTHX);
a0d0e21e 3081 }
533c011a 3082 PL_op = oldop;
a0d0e21e
LW
3083 }
3084 }
3085
3086 if (do_dump) {
a5f75d66 3087#ifdef VMS
6b88bc9c 3088 if (!retop) retop = PL_main_start;
a5f75d66 3089#endif
3280af22
NIS
3090 PL_restartop = retop;
3091 PL_do_undump = TRUE;
a0d0e21e
LW
3092
3093 my_unexec();
3094
3280af22
NIS
3095 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3096 PL_do_undump = FALSE;
a0d0e21e
LW
3097 }
3098
3099 RETURNOP(retop);
3100}
3101
3102PP(pp_exit)
3103{
97aff369 3104 dVAR;
39644a26 3105 dSP;
a0d0e21e
LW
3106 I32 anum;
3107
3108 if (MAXARG < 1)
3109 anum = 0;
9d3c658e
FC
3110 else if (!TOPs) {
3111 anum = 0; (void)POPs;
3112 }
ff0cee69 3113 else {
a0d0e21e 3114 anum = SvIVx(POPs);
d98f61e7
GS
3115#ifdef VMS
3116 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 3117 anum = 0;
96e176bf 3118 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
3119#endif
3120 }
cc3604b1 3121 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
3122#ifdef PERL_MAD
3123 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
3124 if (anum || !(PL_minus_c && PL_madskills))
3125 my_exit(anum);
3126#else
a0d0e21e 3127 my_exit(anum);
81d86705 3128#endif
3280af22 3129 PUSHs(&PL_sv_undef);
a0d0e21e
LW
3130 RETURN;
3131}
3132
a0d0e21e
LW
3133/* Eval. */
3134
0824fdcb 3135STATIC void
cea2e8a9 3136S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3137{
504618e9 3138 const char *s = SvPVX_const(sv);
890ce7af 3139 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3140 I32 line = 1;
a0d0e21e 3141
7918f24d
NC
3142 PERL_ARGS_ASSERT_SAVE_LINES;
3143
a0d0e21e 3144 while (s && s < send) {
f54cb97a 3145 const char *t;
b9f83d2f 3146 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3147
1d963ff3 3148 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
3149 if (t)
3150 t++;
3151 else
3152 t = send;
3153
3154 sv_setpvn(tmpstr, s, t - s);
3155 av_store(array, line++, tmpstr);
3156 s = t;
3157 }
3158}
3159
22f16304
RU
3160/*
3161=for apidoc docatch
3162
3163Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3164
31650 is used as continue inside eval,
3166
31673 is used for a die caught by an inner eval - continue inner loop
3168
3169See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
3170establish a local jmpenv to handle exception traps.
3171
3172=cut
3173*/
0824fdcb 3174STATIC OP *
cea2e8a9 3175S_docatch(pTHX_ OP *o)
1e422769 3176{
97aff369 3177 dVAR;
6224f72b 3178 int ret;
06b5626a 3179 OP * const oldop = PL_op;
db36c5a1 3180 dJMPENV;
1e422769 3181
1e422769 3182#ifdef DEBUGGING
54310121 3183 assert(CATCH_GET == TRUE);
1e422769 3184#endif
312caa8e 3185 PL_op = o;
8bffa5f8 3186
14dd3ad8 3187 JMPENV_PUSH(ret);
6224f72b 3188 switch (ret) {
312caa8e 3189 case 0:
abd70938
DM
3190 assert(cxstack_ix >= 0);
3191 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3192 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3193 redo_body:
85aaa934 3194 CALLRUNOPS(aTHX);
312caa8e
CS
3195 break;
3196 case 3:
8bffa5f8 3197 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z
3198 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3199 PL_restartjmpenv = NULL;
312caa8e
CS
3200 PL_op = PL_restartop;
3201 PL_restartop = 0;
3202 goto redo_body;
3203 }
3204 /* FALL THROUGH */
3205 default:
14dd3ad8 3206 JMPENV_POP;
533c011a 3207 PL_op = oldop;
6224f72b 3208 JMPENV_JUMP(ret);
118e2215 3209 assert(0); /* NOTREACHED */
1e422769 3210 }
14dd3ad8 3211 JMPENV_POP;
533c011a 3212 PL_op = oldop;
5f66b61c 3213 return NULL;
1e422769
PP
3214}
3215
a3985cdc
DM
3216
3217/*
3218=for apidoc find_runcv
3219
3220Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
3221If db_seqp is non_null, skip CVs that are in the DB package and populate
3222*db_seqp with the cop sequence number at the point that the DB:: code was
3223entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 3224than in the scope of the debugger itself).
a3985cdc
DM
3225
3226=cut
3227*/
3228
3229CV*
d819b83a 3230Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3231{
70794f7b
FC
3232 return Perl_find_runcv_where(aTHX_ 0, NULL, db_seqp);
3233}
3234
3235/* If this becomes part of the API, it might need a better name. */
3236CV *
3237Perl_find_runcv_where(pTHX_ U8 cond, void *arg, U32 *db_seqp)
3238{
97aff369 3239 dVAR;
a3985cdc 3240 PERL_SI *si;
b4b0692a 3241 int level = 0;
a3985cdc 3242
d819b83a
DM
3243 if (db_seqp)
3244 *db_seqp = PL_curcop->cop_seq;
a3985cdc 3245 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3246 I32 ix;
a3985cdc 3247 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3248 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
70794f7b 3249 CV *cv = NULL;
d819b83a 3250 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
70794f7b 3251 cv = cx->blk_sub.cv;
d819b83a
DM
3252 /* skip DB:: code */
3253 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3254 *db_seqp = cx->blk_oldcop->cop_seq;
3255 continue;
3256 }
d819b83a 3257 }
a3985cdc 3258 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
70794f7b
FC
3259 cv = cx->blk_eval.cv;
3260 if (cv) {
3261 switch (cond) {
3262 case FIND_RUNCV_root_eq:
3263 if (CvROOT(cv) != (OP *)arg) continue;
b4b0692a
FC
3264 return cv;
3265 case FIND_RUNCV_level_eq:
80544570 3266 if (level++ != PTR2IV(arg)) continue;
70794f7b
FC
3267 /* GERONIMO! */
3268 default:
3269 return cv;
3270 }
3271 }
a3985cdc
DM
3272 }
3273 }
70794f7b 3274 return cond == FIND_RUNCV_root_eq ? NULL : PL_main_cv;
a3985cdc
DM
3275}
3276
3277
27e90453
DM
3278/* Run yyparse() in a setjmp wrapper. Returns:
3279 * 0: yyparse() successful
3280 * 1: yyparse() failed
3281 * 3: yyparse() died
3282 */
3283STATIC int
28ac2b49 3284S_try_yyparse(pTHX_ int gramtype)
27e90453
DM
3285{
3286 int ret;
3287 dJMPENV;
3288
3289 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3290 JMPENV_PUSH(ret);
3291 switch (ret) {
3292 case 0:
28ac2b49 3293 ret = yyparse(gramtype) ? 1 : 0;
27e90453
DM
3294 break;
3295 case 3:
3296 break;
3297 default:
3298 JMPENV_POP;
3299 JMPENV_JUMP(ret);
118e2215 3300 assert(0); /* NOTREACHED */
27e90453
DM
3301 }
3302 JMPENV_POP;
3303 return ret;
3304}
3305
3306
104a8185
DM
3307/* Compile a require/do or an eval ''.
3308 *
a3985cdc 3309 * outside is the lexically enclosing CV (if any) that invoked us.
104a8185
DM
3310 * seq is the current COP scope value.
3311 * hh is the saved hints hash, if any.
3312 *
410be5db 3313 * Returns a bool indicating whether the compile was successful; if so,
104a8185
DM
3314 * PL_eval_start contains the first op of the compiled code; otherwise,
3315 * pushes undef.
3316 *
3317 * This function is called from two places: pp_require and pp_entereval.
3318 * These can be distinguished by whether PL_op is entereval.
7d116edc
FC
3319 */
3320
410be5db 3321STATIC bool
104a8185 3322S_doeval(pTHX_ int gimme, CV* outside, U32 seq, HV *hh)
a0d0e21e 3323{
27da23d5 3324 dVAR; dSP;
46c461b5 3325 OP * const saveop = PL_op;
104a8185 3326 bool clear_hints = saveop->op_type != OP_ENTEREVAL;
f45b078d 3327 COP * const oldcurcop = PL_curcop;
26c9400e 3328 bool in_require = (saveop->op_type == OP_REQUIRE);
27e90453 3329 int yystatus;
676a678a 3330 CV *evalcv;
a0d0e21e 3331
27e90453 3332 PL_in_eval = (in_require
6dc8a9e4
IZ
3333 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
3334 : EVAL_INEVAL);
a0d0e21e 3335
1ce6579f
PP
3336 PUSHMARK(SP);
3337
676a678a
Z
3338 evalcv = MUTABLE_CV(newSV_type(SVt_PVCV));
3339 CvEVAL_on(evalcv);
2090ab20 3340 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
676a678a 3341 cxstack[cxstack_ix].blk_eval.cv = evalcv;
86a64801 3342 cxstack[cxstack_ix].blk_gimme = gimme;
2090ab20 3343
676a678a
Z
3344 CvOUTSIDE_SEQ(evalcv) = seq;
3345 CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3346
dd2155a4 3347 /* set up a scratch pad */
a0d0e21e 3348
676a678a 3349 CvPADLIST(evalcv) = pad_new(padnew_SAVE);
cecbe010 3350 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3351
07055b4c 3352
81d86705 3353 if (!PL_madskills)
676a678a 3354 SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */
748a9306 3355
a0d0e21e
LW
3356 /* make sure we compile in the right package */
3357
ed094faf 3358 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
03d9f026
FC
3359 SAVEGENERICSV(PL_curstash);
3360 PL_curstash = (HV *)SvREFCNT_inc_simple(CopSTASH(PL_curcop));
a0d0e21e 3361 }
3c10abe3 3362 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
3363 SAVESPTR(PL_beginav);
3364 PL_beginav = newAV();
3365 SAVEFREESV(PL_beginav);
3c10abe3
AG
3366 SAVESPTR(PL_unitcheckav);
3367 PL_unitcheckav = newAV();
3368 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3369
81d86705 3370#ifdef PERL_MAD
9da243ce 3371 SAVEBOOL(PL_madskills);
81d86705
NC
3372 PL_madskills = 0;
3373#endif
3374
104a8185 3375 ENTER_with_name("evalcomp");
676a678a
Z
3376 SAVESPTR(PL_compcv);
3377 PL_compcv = evalcv;
3378
a0d0e21e
LW
3379 /* try to compile it */
3380
5f66b61c 3381 PL_eval_root = NULL;
3280af22 3382 PL_curcop = &PL_compiling;
26c9400e 3383 if ((saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3384 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS
3385 else
3386 CLEAR_ERRSV();
27e90453 3387
377b5421
DM
3388 SAVEHINTS();
3389 if (clear_hints) {
3390 PL_hints = 0;
3391 hv_clear(GvHV(PL_hintgv));
3392 }
3393 else {
3394 PL_hints = saveop->op_private & OPpEVAL_COPHH
3395 ? oldcurcop->cop_hints : saveop->op_targ;
3396 if (hh) {
3397 /* SAVEHINTS created a new HV in PL_hintgv, which we need to GC */
3398 SvREFCNT_dec(GvHV(PL_hintgv));
3399 GvHV(PL_hintgv) = hh;
3400 }
3401 }
3402 SAVECOMPILEWARNINGS();
3403 if (clear_hints) {
3404 if (PL_dowarn & G_WARN_ALL_ON)
3405 PL_compiling.cop_warnings = pWARN_ALL ;
3406 else if (PL_dowarn & G_WARN_ALL_OFF)
3407 PL_compiling.cop_warnings = pWARN_NONE ;
3408 else
3409 PL_compiling.cop_warnings = pWARN_STD ;
3410 }
3411 else {
3412 PL_compiling.cop_warnings =
3413 DUP_WARNINGS(oldcurcop->cop_warnings);
3414 cophh_free(CopHINTHASH_get(&PL_compiling));
3415 if (Perl_cop_fetch_label(aTHX_ oldcurcop, NULL, NULL)) {
3416 /* The label, if present, is the first entry on the chain. So rather
3417 than writing a blank label in front of it (which involves an
3418 allocation), just use the next entry in the chain. */
3419 PL_compiling.cop_hints_hash
3420 = cophh_copy(oldcurcop->cop_hints_hash->refcounted_he_next);
3421 /* Check the assumption that this removed the label. */
3422 assert(Perl_cop_fetch_label(aTHX_ &PL_compiling, NULL, NULL) == NULL);
f45b078d 3423 }
377b5421
DM
3424 else
3425 PL_compiling.cop_hints_hash = cophh_copy(oldcurcop->cop_hints_hash);
3426 }
f45b078d 3427
a88d97bf 3428 CALL_BLOCK_HOOKS(bhk_eval, saveop);
52db365a 3429
27e90453
DM
3430 /* note that yyparse() may raise an exception, e.g. C<BEGIN{die}>,
3431 * so honour CATCH_GET and trap it here if necessary */
3432
28ac2b49 3433 yystatus = (!in_require && CATCH_GET) ? S_try_yyparse(aTHX_ GRAMPROG) : yyparse(GRAMPROG);
27e90453
DM
3434
3435 if (yystatus || PL_parser->error_count || !PL_eval_root) {
0c58d367 3436 SV **newsp; /* Used by POPBLOCK. */
d164302a 3437 PERL_CONTEXT *cx;
27e90453 3438 I32 optype; /* Used by POPEVAL. */
d164302a 3439 SV *namesv;
bfed75c6 3440
d164302a
GG
3441 cx = NULL;
3442 namesv = NULL;
27e90453
DM
3443 PERL_UNUSED_VAR(newsp);
3444 PERL_UNUSED_VAR(optype);
3445
c86ffc32
DM
3446 /* note that if yystatus == 3, then the EVAL CX block has already
3447 * been popped, and various vars restored */
533c011a 3448 PL_op = saveop;
27e90453 3449 if (yystatus != 3) {
c86ffc32 3450 if (PL_eval_root) {
8be227ab 3451 cv_forget_slab(evalcv);
c86ffc32
DM
3452 op_free(PL_eval_root);
3453 PL_eval_root = NULL;
3454 }
27e90453 3455 SP = PL_stack_base + POPMARK; /* pop original mark */
377b5421
DM
3456 POPBLOCK(cx,PL_curpm);
3457 POPEVAL(cx);
3458 namesv = cx->blk_eval.old_namesv;