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add GCC_DIAG_IGNORE(), GCC_DIAG_RESTORE macros
[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;
eb578fdb 80 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;
dbc200c5 86 bool is_bare_re= FALSE;
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
dbc200c5
YO
110 /*
111 In the below logic: these are basically the same - check if this regcomp is part of a split.
112
113 (PL_op->op_pmflags & PMf_split )
114 (PL_op->op_next->op_type == OP_PUSHRE)
115
116 We could add a new mask for this and copy the PMf_split, if we did
117 some bit definition fiddling first.
118
119 For now we leave this
120 */
121
3c13cae6
DM
122 new_re = (eng->op_comp
123 ? eng->op_comp
124 : &Perl_re_op_compile
125 )(aTHX_ args, nargs, pm->op_code_list, eng, re,
346d3070 126 &is_bare_re,
dbc200c5 127 (pm->op_pmflags & RXf_PMf_FLAGCOPYMASK),
a5ae69f0
DM
128 pm->op_pmflags |
129 (PL_op->op_flags & OPf_SPECIAL ? PMf_USE_RE_EVAL : 0));
dbc200c5 130
346d3070 131 if (pm->op_pmflags & PMf_HAS_CV)
8d919b0a 132 ReANY(new_re)->qr_anoncv
9fe3265f 133 = (CV*) SvREFCNT_inc(PAD_SV(PL_op->op_targ));
9f141731
DM
134
135 if (is_bare_re) {
136 REGEXP *tmp;
137 /* The match's LHS's get-magic might need to access this op's regexp
138 (e.g. $' =~ /$re/ while foo; see bug 70764). So we must call
139 get-magic now before we replace the regexp. Hopefully this hack can
140 be replaced with the approach described at
141 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03/msg122415.html
142 some day. */
143 if (pm->op_type == OP_MATCH) {
144 SV *lhs;
284167a5 145 const bool was_tainted = TAINT_get;
9f141731
DM
146 if (pm->op_flags & OPf_STACKED)
147 lhs = args[-1];
148 else if (pm->op_private & OPpTARGET_MY)
149 lhs = PAD_SV(pm->op_targ);
150 else lhs = DEFSV;
151 SvGETMAGIC(lhs);
152 /* Restore the previous value of PL_tainted (which may have been
153 modified by get-magic), to avoid incorrectly setting the
284167a5
SM
154 RXf_TAINTED flag with RX_TAINT_on further down. */
155 TAINT_set(was_tainted);
9a9b5ec9
DM
156#if NO_TAINT_SUPPORT
157 PERL_UNUSED_VAR(was_tainted);
158#endif
df787a7b 159 }
9f141731
DM
160 tmp = reg_temp_copy(NULL, new_re);
161 ReREFCNT_dec(new_re);
162 new_re = tmp;
df787a7b 163 }
dbc200c5 164
9f141731
DM
165 if (re != new_re) {
166 ReREFCNT_dec(re);
167 PM_SETRE(pm, new_re);
c277df42 168 }
d4b87e75 169
dbc200c5 170
284167a5 171 if (TAINTING_get && TAINT_get) {
9f141731 172 SvTAINTED_on((SV*)new_re);
284167a5 173 RX_TAINT_on(new_re);
72311751 174 }
72311751 175
c737faaf
YO
176#if !defined(USE_ITHREADS)
177 /* can't change the optree at runtime either */
178 /* PMf_KEEP is handled differently under threads to avoid these problems */
9f141731
DM
179 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
180 pm = PL_curpm;
a0d0e21e 181 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 182 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 183 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 184 }
c737faaf 185#endif
9f141731 186
df787a7b 187 SP = args-1;
a0d0e21e
LW
188 RETURN;
189}
190
9f141731 191
a0d0e21e
LW
192PP(pp_substcont)
193{
97aff369 194 dVAR;
39644a26 195 dSP;
eb578fdb
KW
196 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
197 PMOP * const pm = (PMOP*) cLOGOP->op_other;
198 SV * const dstr = cx->sb_dstr;
199 char *s = cx->sb_s;
200 char *m = cx->sb_m;
a0d0e21e 201 char *orig = cx->sb_orig;
eb578fdb 202 REGEXP * const rx = cx->sb_rx;
c445ea15 203 SV *nsv = NULL;
988e6e7e 204 REGEXP *old = PM_GETRE(pm);
f410a211
NC
205
206 PERL_ASYNC_CHECK();
207
988e6e7e 208 if(old != rx) {
bfed75c6 209 if(old)
988e6e7e 210 ReREFCNT_dec(old);
d6106309 211 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
212 }
213
d9f97599 214 rxres_restore(&cx->sb_rxres, rx);
c90c0ff4 215
a0d0e21e 216 if (cx->sb_iters++) {
a3b680e6 217 const I32 saviters = cx->sb_iters;
a0d0e21e 218 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 219 DIE(aTHX_ "Substitution loop");
a0d0e21e 220
447ee134
DM
221 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
222
ef07e810 223 /* See "how taint works" above pp_subst() */
20be6587
DM
224 if (SvTAINTED(TOPs))
225 cx->sb_rxtainted |= SUBST_TAINT_REPL;
447ee134 226 sv_catsv_nomg(dstr, POPs);
2c296965 227 if (CxONCE(cx) || s < orig ||
03c83e26
DM
228 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
229 (s == m), cx->sb_targ, NULL,
d5e7783a 230 (REXEC_IGNOREPOS|REXEC_NOT_FIRST|REXEC_FAIL_ON_UNDERFLOW)))
a0d0e21e 231 {
8ca8a454 232 SV *targ = cx->sb_targ;
748a9306 233
078c425b
JH
234 assert(cx->sb_strend >= s);
235 if(cx->sb_strend > s) {
236 if (DO_UTF8(dstr) && !SvUTF8(targ))
4bac9ae4 237 sv_catpvn_nomg_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
078c425b 238 else
4bac9ae4 239 sv_catpvn_nomg(dstr, s, cx->sb_strend - s);
078c425b 240 }
20be6587
DM
241 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
242 cx->sb_rxtainted |= SUBST_TAINT_PAT;
9212bbba 243
8ca8a454
NC
244 if (pm->op_pmflags & PMf_NONDESTRUCT) {
245 PUSHs(dstr);
246 /* From here on down we're using the copy, and leaving the
247 original untouched. */
248 targ = dstr;
249 }
250 else {
9e0ea7f3
FC
251 SV_CHECK_THINKFIRST_COW_DROP(targ);
252 if (isGV(targ)) Perl_croak_no_modify();
253 SvPV_free(targ);
8ca8a454
NC
254 SvPV_set(targ, SvPVX(dstr));
255 SvCUR_set(targ, SvCUR(dstr));
256 SvLEN_set(targ, SvLEN(dstr));
257 if (DO_UTF8(dstr))
258 SvUTF8_on(targ);
259 SvPV_set(dstr, NULL);
260
52c47e16 261 PL_tainted = 0;
4f4d7508 262 mPUSHi(saviters - 1);
48c036b1 263
8ca8a454
NC
264 (void)SvPOK_only_UTF8(targ);
265 }
5cd24f17 266
20be6587 267 /* update the taint state of various various variables in
ef07e810
DM
268 * preparation for final exit.
269 * See "how taint works" above pp_subst() */
284167a5 270 if (TAINTING_get) {
20be6587
DM
271 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
272 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
273 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
274 )
275 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
276
277 if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
278 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
279 )
280 SvTAINTED_on(TOPs); /* taint return value */
281 /* needed for mg_set below */
284167a5
SM
282 TAINT_set(
283 cBOOL(cx->sb_rxtainted &
284 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL))
285 );
20be6587
DM
286 SvTAINT(TARG);
287 }
288 /* PL_tainted must be correctly set for this mg_set */
289 SvSETMAGIC(TARG);
290 TAINT_NOT;
4633a7c4 291 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e 292 POPSUBST(cx);
47c9d59f 293 PERL_ASYNC_CHECK();
a0d0e21e 294 RETURNOP(pm->op_next);
118e2215 295 assert(0); /* NOTREACHED */
a0d0e21e 296 }
8e5e9ebe 297 cx->sb_iters = saviters;
a0d0e21e 298 }
07bc277f 299 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
300 m = s;
301 s = orig;
6502e081 302 assert(!RX_SUBOFFSET(rx));
07bc277f 303 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
304 s = orig + (m - s);
305 cx->sb_strend = s + (cx->sb_strend - m);
306 }
07bc277f 307 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 308 if (m > s) {
bfed75c6 309 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
4bac9ae4 310 sv_catpvn_nomg_utf8_upgrade(dstr, s, m - s, nsv);
db79b45b 311 else
4bac9ae4 312 sv_catpvn_nomg(dstr, s, m-s);
db79b45b 313 }
07bc277f 314 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 315 { /* Update the pos() information. */
8ca8a454
NC
316 SV * const sv
317 = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
084916e3 318 MAGIC *mg;
96c2a8ff
FC
319 if (!(mg = mg_find_mglob(sv))) {
320 mg = sv_magicext_mglob(sv);
084916e3 321 }
25fdce4a
FC
322 assert(SvPOK(dstr));
323 MgBYTEPOS_set(mg, sv, SvPVX(dstr), m - orig);
084916e3 324 }
988e6e7e 325 if (old != rx)
d6106309 326 (void)ReREFCNT_inc(rx);
20be6587 327 /* update the taint state of various various variables in preparation
ef07e810
DM
328 * for calling the code block.
329 * See "how taint works" above pp_subst() */
284167a5 330 if (TAINTING_get) {
20be6587
DM
331 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
332 cx->sb_rxtainted |= SUBST_TAINT_PAT;
333
334 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
335 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
336 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
337 )
338 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
339
340 if (cx->sb_iters > 1 && (cx->sb_rxtainted &
341 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
8ca8a454
NC
342 SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
343 ? cx->sb_dstr : cx->sb_targ);
20be6587
DM
344 TAINT_NOT;
345 }
d9f97599 346 rxres_save(&cx->sb_rxres, rx);
af9838cc 347 PL_curpm = pm;
29f2e912 348 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
349}
350
c90c0ff4 351void
864dbfa3 352Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
353{
354 UV *p = (UV*)*rsp;
355 U32 i;
7918f24d
NC
356
357 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 358 PERL_UNUSED_CONTEXT;
c90c0ff4 359
07bc277f 360 if (!p || p[1] < RX_NPARENS(rx)) {
db2c6cb3 361#ifdef PERL_ANY_COW
6502e081 362 i = 7 + (RX_NPARENS(rx)+1) * 2;
ed252734 363#else
6502e081 364 i = 6 + (RX_NPARENS(rx)+1) * 2;
ed252734 365#endif
c90c0ff4 366 if (!p)
a02a5408 367 Newx(p, i, UV);
c90c0ff4
PP
368 else
369 Renew(p, i, UV);
370 *rsp = (void*)p;
371 }
372
5eabab15
DM
373 /* what (if anything) to free on croak */
374 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 375 RX_MATCH_COPIED_off(rx);
6c31ff74 376 *p++ = RX_NPARENS(rx);
c90c0ff4 377
db2c6cb3 378#ifdef PERL_ANY_COW
bdd9a1b1
NC
379 *p++ = PTR2UV(RX_SAVED_COPY(rx));
380 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
381#endif
382
07bc277f
NC
383 *p++ = PTR2UV(RX_SUBBEG(rx));
384 *p++ = (UV)RX_SUBLEN(rx);
6502e081
DM
385 *p++ = (UV)RX_SUBOFFSET(rx);
386 *p++ = (UV)RX_SUBCOFFSET(rx);
07bc277f
NC
387 for (i = 0; i <= RX_NPARENS(rx); ++i) {
388 *p++ = (UV)RX_OFFS(rx)[i].start;
389 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
390 }
391}
392
9c105995
NC
393static void
394S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
395{
396 UV *p = (UV*)*rsp;
397 U32 i;
7918f24d
NC
398
399 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 400 PERL_UNUSED_CONTEXT;
c90c0ff4 401
ed252734 402 RX_MATCH_COPY_FREE(rx);
cf93c79d 403 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4 404 *p++ = 0;
6c31ff74 405 RX_NPARENS(rx) = *p++;
c90c0ff4 406
db2c6cb3 407#ifdef PERL_ANY_COW
bdd9a1b1
NC
408 if (RX_SAVED_COPY(rx))
409 SvREFCNT_dec (RX_SAVED_COPY(rx));
410 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
411 *p++ = 0;
412#endif
413
07bc277f
NC
414 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
415 RX_SUBLEN(rx) = (I32)(*p++);
6502e081
DM
416 RX_SUBOFFSET(rx) = (I32)*p++;
417 RX_SUBCOFFSET(rx) = (I32)*p++;
07bc277f
NC
418 for (i = 0; i <= RX_NPARENS(rx); ++i) {
419 RX_OFFS(rx)[i].start = (I32)(*p++);
420 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
421 }
422}
423
9c105995
NC
424static void
425S_rxres_free(pTHX_ void **rsp)
c90c0ff4 426{
44f8325f 427 UV * const p = (UV*)*rsp;
7918f24d
NC
428
429 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 430 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
431
432 if (p) {
94010e71 433 void *tmp = INT2PTR(char*,*p);
6c31ff74 434#ifdef PERL_POISON
db2c6cb3 435#ifdef PERL_ANY_COW
6c31ff74 436 U32 i = 9 + p[1] * 2;
94010e71 437#else
6c31ff74 438 U32 i = 8 + p[1] * 2;
94010e71 439#endif
6c31ff74
NC
440#endif
441
db2c6cb3 442#ifdef PERL_ANY_COW
6c31ff74 443 SvREFCNT_dec (INT2PTR(SV*,p[2]));
ed252734 444#endif
6c31ff74
NC
445#ifdef PERL_POISON
446 PoisonFree(p, i, sizeof(UV));
447#endif
448
449 Safefree(tmp);
c90c0ff4 450 Safefree(p);
4608196e 451 *rsp = NULL;
c90c0ff4
PP
452 }
453}
454
a701009a
DM
455#define FORM_NUM_BLANK (1<<30)
456#define FORM_NUM_POINT (1<<29)
457
a0d0e21e
LW
458PP(pp_formline)
459{
97aff369 460 dVAR; dSP; dMARK; dORIGMARK;
eb578fdb 461 SV * const tmpForm = *++MARK;
086b26f3 462 SV *formsv; /* contains text of original format */
eb578fdb
KW
463 U32 *fpc; /* format ops program counter */
464 char *t; /* current append position in target string */
086b26f3 465 const char *f; /* current position in format string */
eb578fdb
KW
466 I32 arg;
467 SV *sv = NULL; /* current item */
086b26f3 468 const char *item = NULL;/* string value of current item */
9b4bdfd4
DM
469 I32 itemsize = 0; /* length (chars) of item, possibly truncated */
470 I32 itembytes = 0; /* as itemsize, but length in bytes */
086b26f3
DM
471 I32 fieldsize = 0; /* width of current field */
472 I32 lines = 0; /* number of lines that have been output */
473 bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
474 const char *chophere = NULL; /* where to chop current item */
f5ada144 475 STRLEN linemark = 0; /* pos of start of line in output */
65202027 476 NV value;
086b26f3 477 bool gotsome = FALSE; /* seen at least one non-blank item on this line */
9b4bdfd4 478 STRLEN len; /* length of current sv */
26e935cf 479 STRLEN linemax; /* estimate of output size in bytes */
1bd51a4c
IH
480 bool item_is_utf8 = FALSE;
481 bool targ_is_utf8 = FALSE;
bfed75c6 482 const char *fmt;
74e0ddf7 483 MAGIC *mg = NULL;
4ff700b9
DM
484 U8 *source; /* source of bytes to append */
485 STRLEN to_copy; /* how may bytes to append */
ea60cfe8 486 char trans; /* what chars to translate */
74e0ddf7 487
3808a683 488 mg = doparseform(tmpForm);
a0d0e21e 489
74e0ddf7 490 fpc = (U32*)mg->mg_ptr;
3808a683
DM
491 /* the actual string the format was compiled from.
492 * with overload etc, this may not match tmpForm */
493 formsv = mg->mg_obj;
494
74e0ddf7 495
3280af22 496 SvPV_force(PL_formtarget, len);
3808a683 497 if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
125b9982 498 SvTAINTED_on(PL_formtarget);
1bd51a4c
IH
499 if (DO_UTF8(PL_formtarget))
500 targ_is_utf8 = TRUE;
26e935cf
DM
501 linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
502 t = SvGROW(PL_formtarget, len + linemax + 1);
503 /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
a0d0e21e 504 t += len;
3808a683 505 f = SvPV_const(formsv, len);
a0d0e21e
LW
506
507 for (;;) {
508 DEBUG_f( {
bfed75c6 509 const char *name = "???";
a0d0e21e
LW
510 arg = -1;
511 switch (*fpc) {
512 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
513 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
514 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
515 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
516 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
517
518 case FF_CHECKNL: name = "CHECKNL"; break;
519 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
520 case FF_SPACE: name = "SPACE"; break;
521 case FF_HALFSPACE: name = "HALFSPACE"; break;
522 case FF_ITEM: name = "ITEM"; break;
523 case FF_CHOP: name = "CHOP"; break;
524 case FF_LINEGLOB: name = "LINEGLOB"; break;
525 case FF_NEWLINE: name = "NEWLINE"; break;
526 case FF_MORE: name = "MORE"; break;
527 case FF_LINEMARK: name = "LINEMARK"; break;
528 case FF_END: name = "END"; break;
bfed75c6 529 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 530 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
531 }
532 if (arg >= 0)
bf49b057 533 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 534 else
bf49b057 535 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 536 } );
a0d0e21e 537 switch (*fpc++) {
4a73dc0b 538 case FF_LINEMARK: /* start (or end) of a line */
f5ada144 539 linemark = t - SvPVX(PL_formtarget);
a0d0e21e
LW
540 lines++;
541 gotsome = FALSE;
542 break;
543
4a73dc0b 544 case FF_LITERAL: /* append <arg> literal chars */
ea60cfe8
DM
545 to_copy = *fpc++;
546 source = (U8 *)f;
547 f += to_copy;
548 trans = '~';
75645721 549 item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
ea60cfe8 550 goto append;
a0d0e21e 551
4a73dc0b 552 case FF_SKIP: /* skip <arg> chars in format */
a0d0e21e
LW
553 f += *fpc++;
554 break;
555
4a73dc0b 556 case FF_FETCH: /* get next item and set field size to <arg> */
a0d0e21e
LW
557 arg = *fpc++;
558 f += arg;
559 fieldsize = arg;
560
561 if (MARK < SP)
562 sv = *++MARK;
563 else {
3280af22 564 sv = &PL_sv_no;
a2a5de95 565 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e 566 }
125b9982
NT
567 if (SvTAINTED(sv))
568 SvTAINTED_on(PL_formtarget);
a0d0e21e
LW
569 break;
570
4a73dc0b 571 case FF_CHECKNL: /* find max len of item (up to \n) that fits field */
5a34cab7 572 {
5a34cab7 573 const char *s = item = SvPV_const(sv, len);
9b4bdfd4
DM
574 const char *send = s + len;
575
576 itemsize = 0;
577 item_is_utf8 = DO_UTF8(sv);
578 while (s < send) {
579 if (!isCNTRL(*s))
580 gotsome = TRUE;
581 else if (*s == '\n')
582 break;
583
584 if (item_is_utf8)
585 s += UTF8SKIP(s);
586 else
587 s++;
588 itemsize++;
589 if (itemsize == fieldsize)
590 break;
591 }
592 itembytes = s - item;
5a34cab7 593 break;
a0ed51b3 594 }
a0d0e21e 595
4a73dc0b 596 case FF_CHECKCHOP: /* like CHECKNL, but up to highest split point */
5a34cab7
NC
597 {
598 const char *s = item = SvPV_const(sv, len);
9b4bdfd4
DM
599 const char *send = s + len;
600 I32 size = 0;
601
602 chophere = NULL;
603 item_is_utf8 = DO_UTF8(sv);
604 while (s < send) {
605 /* look for a legal split position */
606 if (isSPACE(*s)) {
607 if (*s == '\r') {
608 chophere = s;
609 itemsize = size;
610 break;
611 }
612 if (chopspace) {
613 /* provisional split point */
614 chophere = s;
615 itemsize = size;
616 }
617 /* we delay testing fieldsize until after we've
618 * processed the possible split char directly
619 * following the last field char; so if fieldsize=3
620 * and item="a b cdef", we consume "a b", not "a".
621 * Ditto further down.
622 */
623 if (size == fieldsize)
624 break;
625 }
626 else {
627 if (strchr(PL_chopset, *s)) {
628 /* provisional split point */
629 /* for a non-space split char, we include
630 * the split char; hence the '+1' */
631 chophere = s + 1;
632 itemsize = size;
633 }
634 if (size == fieldsize)
635 break;
636 if (!isCNTRL(*s))
637 gotsome = TRUE;
638 }
639
640 if (item_is_utf8)
641 s += UTF8SKIP(s);
642 else
077dbbf3 643 s++;
9b4bdfd4
DM
644 size++;
645 }
646 if (!chophere || s == send) {
647 chophere = s;
648 itemsize = size;
649 }
650 itembytes = chophere - item;
651
5a34cab7 652 break;
a0d0e21e 653 }
a0d0e21e 654
4a73dc0b 655 case FF_SPACE: /* append padding space (diff of field, item size) */
a0d0e21e
LW
656 arg = fieldsize - itemsize;
657 if (arg) {
658 fieldsize -= arg;
659 while (arg-- > 0)
660 *t++ = ' ';
661 }
662 break;
663
4a73dc0b 664 case FF_HALFSPACE: /* like FF_SPACE, but only append half as many */
a0d0e21e
LW
665 arg = fieldsize - itemsize;
666 if (arg) {
667 arg /= 2;
668 fieldsize -= arg;
669 while (arg-- > 0)
670 *t++ = ' ';
671 }
672 break;
673
4a73dc0b 674 case FF_ITEM: /* append a text item, while blanking ctrl chars */
9b4bdfd4 675 to_copy = itembytes;
8aa7beb6
DM
676 source = (U8 *)item;
677 trans = 1;
8aa7beb6 678 goto append;
a0d0e21e 679
4a73dc0b 680 case FF_CHOP: /* (for ^*) chop the current item */
5a34cab7
NC
681 {
682 const char *s = chophere;
683 if (chopspace) {
af68e756 684 while (isSPACE(*s))
5a34cab7
NC
685 s++;
686 }
9b4bdfd4
DM
687 if (SvPOKp(sv))
688 sv_chop(sv,s);
689 else
690 /* tied, overloaded or similar strangeness.
691 * Do it the hard way */
692 sv_setpvn(sv, s, len - (s-item));
5a34cab7
NC
693 SvSETMAGIC(sv);
694 break;
a0d0e21e 695 }
a0d0e21e 696
4a73dc0b 697 case FF_LINESNGL: /* process ^* */
a1b95068 698 chopspace = 0;
4a73dc0b
DM
699
700 case FF_LINEGLOB: /* process @* */
5a34cab7 701 {
e32383e2 702 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 703 const char *s = item = SvPV_const(sv, len);
7440a75b 704 const char *const send = s + len;
7440a75b 705
f3f2f1a3 706 item_is_utf8 = DO_UTF8(sv);
a1137ee5 707 if (!len)
7440a75b 708 break;
ea60cfe8 709 trans = 0;
0d21cefe 710 gotsome = TRUE;
a1137ee5 711 chophere = s + len;
4ff700b9
DM
712 source = (U8 *) s;
713 to_copy = len;
0d21cefe
DM
714 while (s < send) {
715 if (*s++ == '\n') {
716 if (oneline) {
9b4bdfd4 717 to_copy = s - item - 1;
0d21cefe
DM
718 chophere = s;
719 break;
720 } else {
721 if (s == send) {
0d21cefe
DM
722 to_copy--;
723 } else
724 lines++;
1bd51a4c 725 }
a0d0e21e 726 }
0d21cefe 727 }
a2c0032b
DM
728 }
729
ea60cfe8
DM
730 append:
731 /* append to_copy bytes from source to PL_formstring.
732 * item_is_utf8 implies source is utf8.
733 * if trans, translate certain characters during the copy */
a2c0032b
DM
734 {
735 U8 *tmp = NULL;
26e935cf 736 STRLEN grow = 0;
0325ce87
DM
737
738 SvCUR_set(PL_formtarget,
739 t - SvPVX_const(PL_formtarget));
740
0d21cefe
DM
741 if (targ_is_utf8 && !item_is_utf8) {
742 source = tmp = bytes_to_utf8(source, &to_copy);
0d21cefe
DM
743 } else {
744 if (item_is_utf8 && !targ_is_utf8) {
f5ada144 745 U8 *s;
0d21cefe 746 /* Upgrade targ to UTF8, and then we reduce it to
0325ce87
DM
747 a problem we have a simple solution for.
748 Don't need get magic. */
0d21cefe 749 sv_utf8_upgrade_nomg(PL_formtarget);
0325ce87 750 targ_is_utf8 = TRUE;
f5ada144
DM
751 /* re-calculate linemark */
752 s = (U8*)SvPVX(PL_formtarget);
26e935cf
DM
753 /* the bytes we initially allocated to append the
754 * whole line may have been gobbled up during the
755 * upgrade, so allocate a whole new line's worth
756 * for safety */
757 grow = linemax;
f5ada144
DM
758 while (linemark--)
759 s += UTF8SKIP(s);
760 linemark = s - (U8*)SvPVX(PL_formtarget);
e8e72d41 761 }
0d21cefe
DM
762 /* Easy. They agree. */
763 assert (item_is_utf8 == targ_is_utf8);
764 }
26e935cf
DM
765 if (!trans)
766 /* @* and ^* are the only things that can exceed
767 * the linemax, so grow by the output size, plus
768 * a whole new form's worth in case of any further
769 * output */
770 grow = linemax + to_copy;
771 if (grow)
772 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
0d21cefe
DM
773 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
774
775 Copy(source, t, to_copy, char);
ea60cfe8 776 if (trans) {
8aa7beb6
DM
777 /* blank out ~ or control chars, depending on trans.
778 * works on bytes not chars, so relies on not
779 * matching utf8 continuation bytes */
ea60cfe8
DM
780 U8 *s = (U8*)t;
781 U8 *send = s + to_copy;
782 while (s < send) {
8aa7beb6 783 const int ch = *s;
077dbbf3 784 if (trans == '~' ? (ch == '~') : isCNTRL(ch))
ea60cfe8
DM
785 *s = ' ';
786 s++;
787 }
788 }
789
0d21cefe
DM
790 t += to_copy;
791 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
a1137ee5 792 if (tmp)
0d21cefe 793 Safefree(tmp);
5a34cab7 794 break;
a0d0e21e 795 }
a0d0e21e 796
4a73dc0b 797 case FF_0DECIMAL: /* like FF_DECIMAL but for 0### */
a1b95068
LW
798 arg = *fpc++;
799#if defined(USE_LONG_DOUBLE)
10edeb5d 800 fmt = (const char *)
a701009a 801 ((arg & FORM_NUM_POINT) ?
10edeb5d 802 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 803#else
10edeb5d 804 fmt = (const char *)
a701009a 805 ((arg & FORM_NUM_POINT) ?
10edeb5d 806 "%#0*.*f" : "%0*.*f");
a1b95068
LW
807#endif
808 goto ff_dec;
4a73dc0b
DM
809
810 case FF_DECIMAL: /* do @##, ^##, where <arg>=(precision|flags) */
a0d0e21e 811 arg = *fpc++;
65202027 812#if defined(USE_LONG_DOUBLE)
10edeb5d 813 fmt = (const char *)
a701009a 814 ((arg & FORM_NUM_POINT) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 815#else
10edeb5d 816 fmt = (const char *)
a701009a 817 ((arg & FORM_NUM_POINT) ? "%#*.*f" : "%*.*f");
65202027 818#endif
a1b95068 819 ff_dec:
784707d5
JP
820 /* If the field is marked with ^ and the value is undefined,
821 blank it out. */
a701009a 822 if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
784707d5
JP
823 arg = fieldsize;
824 while (arg--)
825 *t++ = ' ';
826 break;
827 }
828 gotsome = TRUE;
829 value = SvNV(sv);
a1b95068 830 /* overflow evidence */
bfed75c6 831 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
832 arg = fieldsize;
833 while (arg--)
834 *t++ = '#';
835 break;
836 }
784707d5
JP
837 /* Formats aren't yet marked for locales, so assume "yes". */
838 {
839 STORE_NUMERIC_STANDARD_SET_LOCAL();
a701009a
DM
840 arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
841 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg, value);
784707d5
JP
842 RESTORE_NUMERIC_STANDARD();
843 }
844 t += fieldsize;
845 break;
a1b95068 846
4a73dc0b 847 case FF_NEWLINE: /* delete trailing spaces, then append \n */
a0d0e21e 848 f++;
f5ada144 849 while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
a0d0e21e
LW
850 t++;
851 *t++ = '\n';
852 break;
853
4a73dc0b 854 case FF_BLANK: /* for arg==0: do '~'; for arg>0 : do '~~' */
a0d0e21e
LW
855 arg = *fpc++;
856 if (gotsome) {
857 if (arg) { /* repeat until fields exhausted? */
11f9eeaf
DM
858 fpc--;
859 goto end;
a0d0e21e
LW
860 }
861 }
862 else {
f5ada144 863 t = SvPVX(PL_formtarget) + linemark;
a0d0e21e
LW
864 lines--;
865 }
866 break;
867
4a73dc0b 868 case FF_MORE: /* replace long end of string with '...' */
5a34cab7
NC
869 {
870 const char *s = chophere;
871 const char *send = item + len;
872 if (chopspace) {
af68e756 873 while (isSPACE(*s) && (s < send))
5a34cab7 874 s++;
a0d0e21e 875 }
5a34cab7
NC
876 if (s < send) {
877 char *s1;
878 arg = fieldsize - itemsize;
879 if (arg) {
880 fieldsize -= arg;
881 while (arg-- > 0)
882 *t++ = ' ';
883 }
884 s1 = t - 3;
885 if (strnEQ(s1," ",3)) {
886 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
887 s1--;
888 }
889 *s1++ = '.';
890 *s1++ = '.';
891 *s1++ = '.';
a0d0e21e 892 }
5a34cab7 893 break;
a0d0e21e 894 }
4a73dc0b
DM
895
896 case FF_END: /* tidy up, then return */
11f9eeaf 897 end:
bf2bec63 898 assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
a0d0e21e 899 *t = '\0';
b15aece3 900 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
901 if (targ_is_utf8)
902 SvUTF8_on(PL_formtarget);
3280af22 903 FmLINES(PL_formtarget) += lines;
a0d0e21e 904 SP = ORIGMARK;
11f9eeaf
DM
905 if (fpc[-1] == FF_BLANK)
906 RETURNOP(cLISTOP->op_first);
907 else
908 RETPUSHYES;
a0d0e21e
LW
909 }
910 }
911}
912
913PP(pp_grepstart)
914{
27da23d5 915 dVAR; dSP;
a0d0e21e
LW
916 SV *src;
917
3280af22 918 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 919 (void)POPMARK;
54310121 920 if (GIMME_V == G_SCALAR)
6e449a3a 921 mXPUSHi(0);
533c011a 922 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 923 }
3280af22 924 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
897d3989
NC
925 Perl_pp_pushmark(aTHX); /* push dst */
926 Perl_pp_pushmark(aTHX); /* push src */
d343c3ef 927 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW
928
929 SAVETMPS;
59f00321
RGS
930 if (PL_op->op_private & OPpGREP_LEX)
931 SAVESPTR(PAD_SVl(PL_op->op_targ));
932 else
933 SAVE_DEFSV;
d343c3ef 934 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 935 SAVEVPTR(PL_curpm);
a0d0e21e 936
3280af22 937 src = PL_stack_base[*PL_markstack_ptr];
a0ed822e
FC
938 if (SvPADTMP(src) && !IS_PADGV(src)) {
939 src = PL_stack_base[*PL_markstack_ptr] = sv_mortalcopy(src);
940 PL_tmps_floor++;
941 }
a0d0e21e 942 SvTEMP_off(src);
59f00321
RGS
943 if (PL_op->op_private & OPpGREP_LEX)
944 PAD_SVl(PL_op->op_targ) = src;
945 else
414bf5ae 946 DEFSV_set(src);
a0d0e21e
LW
947
948 PUTBACK;
533c011a 949 if (PL_op->op_type == OP_MAPSTART)
897d3989 950 Perl_pp_pushmark(aTHX); /* push top */
533c011a 951 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
952}
953
a0d0e21e
LW
954PP(pp_mapwhile)
955{
27da23d5 956 dVAR; dSP;
f54cb97a 957 const I32 gimme = GIMME_V;
544f3153 958 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
959 I32 count;
960 I32 shift;
961 SV** src;
ac27b0f5 962 SV** dst;
a0d0e21e 963
544f3153 964 /* first, move source pointer to the next item in the source list */
3280af22 965 ++PL_markstack_ptr[-1];
544f3153
GS
966
967 /* if there are new items, push them into the destination list */
4c90a460 968 if (items && gimme != G_VOID) {
544f3153
GS
969 /* might need to make room back there first */
970 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
971 /* XXX this implementation is very pessimal because the stack
972 * is repeatedly extended for every set of items. Is possible
973 * to do this without any stack extension or copying at all
974 * by maintaining a separate list over which the map iterates
18ef8bea 975 * (like foreach does). --gsar */
544f3153
GS
976
977 /* everything in the stack after the destination list moves
978 * towards the end the stack by the amount of room needed */
979 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
980
981 /* items to shift up (accounting for the moved source pointer) */
982 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
983
984 /* This optimization is by Ben Tilly and it does
985 * things differently from what Sarathy (gsar)
986 * is describing. The downside of this optimization is
987 * that leaves "holes" (uninitialized and hopefully unused areas)
988 * to the Perl stack, but on the other hand this
989 * shouldn't be a problem. If Sarathy's idea gets
990 * implemented, this optimization should become
991 * irrelevant. --jhi */
992 if (shift < count)
993 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 994
924508f0
GS
995 EXTEND(SP,shift);
996 src = SP;
997 dst = (SP += shift);
3280af22
NIS
998 PL_markstack_ptr[-1] += shift;
999 *PL_markstack_ptr += shift;
544f3153 1000 while (count--)
a0d0e21e
LW
1001 *dst-- = *src--;
1002 }
544f3153 1003 /* copy the new items down to the destination list */
ac27b0f5 1004 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26 1005 if (gimme == G_ARRAY) {
b2a2a901
DM
1006 /* add returned items to the collection (making mortal copies
1007 * if necessary), then clear the current temps stack frame
1008 * *except* for those items. We do this splicing the items
1009 * into the start of the tmps frame (so some items may be on
59d53fd6 1010 * the tmps stack twice), then moving PL_tmps_floor above
b2a2a901
DM
1011 * them, then freeing the frame. That way, the only tmps that
1012 * accumulate over iterations are the return values for map.
1013 * We have to do to this way so that everything gets correctly
1014 * freed if we die during the map.
1015 */
1016 I32 tmpsbase;
1017 I32 i = items;
1018 /* make space for the slice */
1019 EXTEND_MORTAL(items);
1020 tmpsbase = PL_tmps_floor + 1;
1021 Move(PL_tmps_stack + tmpsbase,
1022 PL_tmps_stack + tmpsbase + items,
1023 PL_tmps_ix - PL_tmps_floor,
1024 SV*);
1025 PL_tmps_ix += items;
1026
1027 while (i-- > 0) {
1028 SV *sv = POPs;
1029 if (!SvTEMP(sv))
1030 sv = sv_mortalcopy(sv);
1031 *dst-- = sv;
1032 PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
1033 }
1034 /* clear the stack frame except for the items */
1035 PL_tmps_floor += items;
1036 FREETMPS;
1037 /* FREETMPS may have cleared the TEMP flag on some of the items */
1038 i = items;
1039 while (i-- > 0)
1040 SvTEMP_on(PL_tmps_stack[--tmpsbase]);
22023b26 1041 }
bfed75c6 1042 else {
22023b26
TP
1043 /* scalar context: we don't care about which values map returns
1044 * (we use undef here). And so we certainly don't want to do mortal
1045 * copies of meaningless values. */
1046 while (items-- > 0) {
b988aa42 1047 (void)POPs;
22023b26
TP
1048 *dst-- = &PL_sv_undef;
1049 }
b2a2a901 1050 FREETMPS;
22023b26 1051 }
a0d0e21e 1052 }
b2a2a901
DM
1053 else {
1054 FREETMPS;
1055 }
d343c3ef 1056 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW
1057
1058 /* All done yet? */
3280af22 1059 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1060
1061 (void)POPMARK; /* pop top */
d343c3ef 1062 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1063 (void)POPMARK; /* pop src */
3280af22 1064 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1065 (void)POPMARK; /* pop dst */
3280af22 1066 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1067 if (gimme == G_SCALAR) {
7cc47870
RGS
1068 if (PL_op->op_private & OPpGREP_LEX) {
1069 SV* sv = sv_newmortal();
1070 sv_setiv(sv, items);
1071 PUSHs(sv);
1072 }
1073 else {
1074 dTARGET;
1075 XPUSHi(items);
1076 }
a0d0e21e 1077 }
54310121
PP
1078 else if (gimme == G_ARRAY)
1079 SP += items;
a0d0e21e
LW
1080 RETURN;
1081 }
1082 else {
1083 SV *src;
1084
d343c3ef 1085 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1086 SAVEVPTR(PL_curpm);
a0d0e21e 1087
544f3153 1088 /* set $_ to the new source item */
3280af22 1089 src = PL_stack_base[PL_markstack_ptr[-1]];
a0ed822e 1090 if (SvPADTMP(src) && !IS_PADGV(src)) src = sv_mortalcopy(src);
a0d0e21e 1091 SvTEMP_off(src);
59f00321
RGS
1092 if (PL_op->op_private & OPpGREP_LEX)
1093 PAD_SVl(PL_op->op_targ) = src;
1094 else
414bf5ae 1095 DEFSV_set(src);
a0d0e21e
LW
1096
1097 RETURNOP(cLOGOP->op_other);
1098 }
1099}
1100
a0d0e21e
LW
1101/* Range stuff. */
1102
1103PP(pp_range)
1104{
97aff369 1105 dVAR;
a0d0e21e 1106 if (GIMME == G_ARRAY)
1a67a97c 1107 return NORMAL;
538573f7 1108 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1109 return cLOGOP->op_other;
538573f7 1110 else
1a67a97c 1111 return NORMAL;
a0d0e21e
LW
1112}
1113
1114PP(pp_flip)
1115{
97aff369 1116 dVAR;
39644a26 1117 dSP;
a0d0e21e
LW
1118
1119 if (GIMME == G_ARRAY) {
1a67a97c 1120 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1121 }
1122 else {
1123 dTOPss;
44f8325f 1124 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1125 int flip = 0;
790090df 1126
bfed75c6 1127 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1128 if (GvIO(PL_last_in_gv)) {
1129 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1130 }
1131 else {
fafc274c 1132 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1133 if (gv && GvSV(gv))
1134 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1135 }
bfed75c6
AL
1136 } else {
1137 flip = SvTRUE(sv);
1138 }
1139 if (flip) {
a0d0e21e 1140 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1141 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1142 sv_setiv(targ, 1);
3e3baf6d 1143 SETs(targ);
a0d0e21e
LW
1144 RETURN;
1145 }
1146 else {
1147 sv_setiv(targ, 0);
924508f0 1148 SP--;
1a67a97c 1149 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1150 }
1151 }
76f68e9b 1152 sv_setpvs(TARG, "");
a0d0e21e
LW
1153 SETs(targ);
1154 RETURN;
1155 }
1156}
1157
8e9bbdb9
RGS
1158/* This code tries to decide if "$left .. $right" should use the
1159 magical string increment, or if the range is numeric (we make
1160 an exception for .."0" [#18165]). AMS 20021031. */
1161
1162#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1163 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1164 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1165 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1166 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1167 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1168
a0d0e21e
LW
1169PP(pp_flop)
1170{
97aff369 1171 dVAR; dSP;
a0d0e21e
LW
1172
1173 if (GIMME == G_ARRAY) {
1174 dPOPPOPssrl;
86cb7173 1175
5b295bef
RD
1176 SvGETMAGIC(left);
1177 SvGETMAGIC(right);
a0d0e21e 1178
8e9bbdb9 1179 if (RANGE_IS_NUMERIC(left,right)) {
eb578fdb 1180 IV i, j;
901017d6 1181 IV max;
4d91eccc
FC
1182 if ((SvOK(left) && !SvIOK(left) && SvNV_nomg(left) < IV_MIN) ||
1183 (SvOK(right) && (SvIOK(right)
1184 ? SvIsUV(right) && SvUV(right) > IV_MAX
1185 : SvNV_nomg(right) > IV_MAX)))
d470f89e 1186 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
1187 i = SvIV_nomg(left);
1188 max = SvIV_nomg(right);
bbce6d69 1189 if (max >= i) {
c1ab3db2 1190 j = max - i + 1;
9a543cee
FC
1191 if (j > SSize_t_MAX)
1192 Perl_croak(aTHX_ "Out of memory during list extend");
c1ab3db2
AK
1193 EXTEND_MORTAL(j);
1194 EXTEND(SP, j);
bbce6d69 1195 }
c1ab3db2
AK
1196 else
1197 j = 0;
1198 while (j--) {
901017d6 1199 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1200 PUSHs(sv);
1201 }
1202 }
1203 else {
3c323193
FC
1204 STRLEN len, llen;
1205 const char * const lpv = SvPV_nomg_const(left, llen);
f52e41ad 1206 const char * const tmps = SvPV_nomg_const(right, len);
a0d0e21e 1207
3c323193 1208 SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP);
89ea2908 1209 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1210 XPUSHs(sv);
b15aece3 1211 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1212 break;
a0d0e21e
LW
1213 sv = sv_2mortal(newSVsv(sv));
1214 sv_inc(sv);
1215 }
a0d0e21e
LW
1216 }
1217 }
1218 else {
1219 dTOPss;
901017d6 1220 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1221 int flop = 0;
a0d0e21e 1222 sv_inc(targ);
4e3399f9
YST
1223
1224 if (PL_op->op_private & OPpFLIP_LINENUM) {
1225 if (GvIO(PL_last_in_gv)) {
1226 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1227 }
1228 else {
fafc274c 1229 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1230 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1231 }
1232 }
1233 else {
1234 flop = SvTRUE(sv);
1235 }
1236
1237 if (flop) {
a0d0e21e 1238 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1239 sv_catpvs(targ, "E0");
a0d0e21e
LW
1240 }
1241 SETs(targ);
1242 }
1243
1244 RETURN;
1245}
1246
1247/* Control. */
1248
27da23d5 1249static const char * const context_name[] = {
515afda2 1250 "pseudo-block",
f31522f3 1251 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1252 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1253 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1254 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1255 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1256 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1257 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1258 "subroutine",
76753e7f 1259 "format",
515afda2 1260 "eval",
515afda2 1261 "substitution",
515afda2
NC
1262};
1263
76e3520e 1264STATIC I32
5db1eb8d 1265S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags)
a0d0e21e 1266{
97aff369 1267 dVAR;
eb578fdb 1268 I32 i;
a0d0e21e 1269
7918f24d
NC
1270 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1271
a0d0e21e 1272 for (i = cxstack_ix; i >= 0; i--) {
eb578fdb 1273 const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1274 switch (CxTYPE(cx)) {
a0d0e21e 1275 case CXt_SUBST:
a0d0e21e 1276 case CXt_SUB:
7766f137 1277 case CXt_FORMAT:
a0d0e21e 1278 case CXt_EVAL:
0a753a76 1279 case CXt_NULL:
dcbac5bb 1280 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1281 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1282 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1283 if (CxTYPE(cx) == CXt_NULL)
1284 return -1;
1285 break;
c6fdafd0 1286 case CXt_LOOP_LAZYIV:
d01136d6 1287 case CXt_LOOP_LAZYSV:
3b719c58
NC
1288 case CXt_LOOP_FOR:
1289 case CXt_LOOP_PLAIN:
7e8f1eac 1290 {
5db1eb8d
BF
1291 STRLEN cx_label_len = 0;
1292 U32 cx_label_flags = 0;
1293 const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags);
1294 if (!cx_label || !(
1295 ( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
1296 (flags & SVf_UTF8)
1297 ? (bytes_cmp_utf8(
1298 (const U8*)cx_label, cx_label_len,
1299 (const U8*)label, len) == 0)
1300 : (bytes_cmp_utf8(
1301 (const U8*)label, len,
1302 (const U8*)cx_label, cx_label_len) == 0)
eade7155
BF
1303 : (len == cx_label_len && ((cx_label == label)
1304 || memEQ(cx_label, label, len))) )) {
1c98cc53 1305 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1306 (long)i, cx_label));
a0d0e21e
LW
1307 continue;
1308 }
1c98cc53 1309 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1310 return i;
7e8f1eac 1311 }
a0d0e21e
LW
1312 }
1313 }
1314 return i;
1315}
1316
0d863452
RH
1317
1318
e50aee73 1319I32
864dbfa3 1320Perl_dowantarray(pTHX)
e50aee73 1321{
97aff369 1322 dVAR;
f54cb97a 1323 const I32 gimme = block_gimme();
54310121
PP
1324 return (gimme == G_VOID) ? G_SCALAR : gimme;
1325}
1326
1327I32
864dbfa3 1328Perl_block_gimme(pTHX)
54310121 1329{
97aff369 1330 dVAR;
06b5626a 1331 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1332 if (cxix < 0)
46fc3d4c 1333 return G_VOID;
e50aee73 1334
54310121 1335 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1336 case G_VOID:
1337 return G_VOID;
54310121 1338 case G_SCALAR:
e50aee73 1339 return G_SCALAR;
54310121
PP
1340 case G_ARRAY:
1341 return G_ARRAY;
1342 default:
cea2e8a9 1343 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
118e2215 1344 assert(0); /* NOTREACHED */
d2719217 1345 return 0;
54310121 1346 }
e50aee73
AD
1347}
1348
78f9721b
SM
1349I32
1350Perl_is_lvalue_sub(pTHX)
1351{
97aff369 1352 dVAR;
06b5626a 1353 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1354 assert(cxix >= 0); /* We should only be called from inside subs */
1355
bafb2adc
NC
1356 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1357 return CxLVAL(cxstack + cxix);
78f9721b
SM
1358 else
1359 return 0;
1360}
1361
777d9014
FC
1362/* only used by PUSHSUB */
1363I32
1364Perl_was_lvalue_sub(pTHX)
1365{
1366 dVAR;
1367 const I32 cxix = dopoptosub(cxstack_ix-1);
1368 assert(cxix >= 0); /* We should only be called from inside subs */
1369
1370 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1371 return CxLVAL(cxstack + cxix);
1372 else
1373 return 0;
1374}
1375
76e3520e 1376STATIC I32
901017d6 1377S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1378{
97aff369 1379 dVAR;
a0d0e21e 1380 I32 i;
7918f24d
NC
1381
1382 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1383
a0d0e21e 1384 for (i = startingblock; i >= 0; i--) {
eb578fdb 1385 const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1386 switch (CxTYPE(cx)) {
a0d0e21e
LW
1387 default:
1388 continue;
a0d0e21e 1389 case CXt_SUB:
5fbe8311
DM
1390 /* in sub foo { /(?{...})/ }, foo ends up on the CX stack
1391 * twice; the first for the normal foo() call, and the second
1392 * for a faked up re-entry into the sub to execute the
1393 * code block. Hide this faked entry from the world. */
1394 if (cx->cx_type & CXp_SUB_RE_FAKE)
1395 continue;
1396 case CXt_EVAL:
7766f137 1397 case CXt_FORMAT:
1c98cc53 1398 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW
1399 return i;
1400 }
1401 }
1402 return i;
1403}
1404
76e3520e 1405STATIC I32
cea2e8a9 1406S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1407{
97aff369 1408 dVAR;
a0d0e21e 1409 I32 i;
a0d0e21e 1410 for (i = startingblock; i >= 0; i--) {
eb578fdb 1411 const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1412 switch (CxTYPE(cx)) {
a0d0e21e
LW
1413 default:
1414 continue;
1415 case CXt_EVAL:
1c98cc53 1416 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW
1417 return i;
1418 }
1419 }
1420 return i;
1421}
1422
76e3520e 1423STATIC I32
cea2e8a9 1424S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1425{
97aff369 1426 dVAR;
a0d0e21e 1427 I32 i;
a0d0e21e 1428 for (i = startingblock; i >= 0; i--) {
eb578fdb 1429 const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1430 switch (CxTYPE(cx)) {
a0d0e21e 1431 case CXt_SUBST:
a0d0e21e 1432 case CXt_SUB:
7766f137 1433 case CXt_FORMAT:
a0d0e21e 1434 case CXt_EVAL:
0a753a76 1435 case CXt_NULL:
dcbac5bb 1436 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC
1437 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1438 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1439 if ((CxTYPE(cx)) == CXt_NULL)
1440 return -1;
1441 break;
c6fdafd0 1442 case CXt_LOOP_LAZYIV:
d01136d6 1443 case CXt_LOOP_LAZYSV:
3b719c58
NC
1444 case CXt_LOOP_FOR:
1445 case CXt_LOOP_PLAIN:
1c98cc53 1446 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW
1447 return i;
1448 }
1449 }
1450 return i;
1451}
1452
0d863452
RH
1453STATIC I32
1454S_dopoptogiven(pTHX_ I32 startingblock)
1455{
97aff369 1456 dVAR;
0d863452
RH
1457 I32 i;
1458 for (i = startingblock; i >= 0; i--) {
eb578fdb 1459 const PERL_CONTEXT *cx = &cxstack[i];
0d863452
RH
1460 switch (CxTYPE(cx)) {
1461 default:
1462 continue;
1463 case CXt_GIVEN:
1c98cc53 1464 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1465 return i;
3b719c58
NC
1466 case CXt_LOOP_PLAIN:
1467 assert(!CxFOREACHDEF(cx));
1468 break;
c6fdafd0 1469 case CXt_LOOP_LAZYIV:
d01136d6 1470 case CXt_LOOP_LAZYSV:
3b719c58 1471 case CXt_LOOP_FOR:
0d863452 1472 if (CxFOREACHDEF(cx)) {
1c98cc53 1473 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH
1474 return i;
1475 }
1476 }
1477 }
1478 return i;
1479}
1480
1481STATIC I32
1482S_dopoptowhen(pTHX_ I32 startingblock)
1483{
97aff369 1484 dVAR;
0d863452
RH
1485 I32 i;
1486 for (i = startingblock; i >= 0; i--) {
eb578fdb 1487 const PERL_CONTEXT *cx = &cxstack[i];
0d863452
RH
1488 switch (CxTYPE(cx)) {
1489 default:
1490 continue;
1491 case CXt_WHEN:
1c98cc53 1492 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH
1493 return i;
1494 }
1495 }
1496 return i;
1497}
1498
a0d0e21e 1499void
864dbfa3 1500Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1501{
97aff369 1502 dVAR;
a0d0e21e
LW
1503 I32 optype;
1504
f144f1e3
DM
1505 if (!PL_curstackinfo) /* can happen if die during thread cloning */
1506 return;
1507
a0d0e21e 1508 while (cxstack_ix > cxix) {
b0d9ce38 1509 SV *sv;
eb578fdb 1510 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1511 DEBUG_CX("UNWIND"); \
a0d0e21e 1512 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1513 switch (CxTYPE(cx)) {
c90c0ff4
PP
1514 case CXt_SUBST:
1515 POPSUBST(cx);
1516 continue; /* not break */
a0d0e21e 1517 case CXt_SUB:
b0d9ce38
GS
1518 POPSUB(cx,sv);
1519 LEAVESUB(sv);
a0d0e21e
LW
1520 break;
1521 case CXt_EVAL:
1522 POPEVAL(cx);
1523 break;
c6fdafd0 1524 case CXt_LOOP_LAZYIV:
d01136d6 1525 case CXt_LOOP_LAZYSV:
3b719c58
NC
1526 case CXt_LOOP_FOR:
1527 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1528 POPLOOP(cx);
1529 break;
0a753a76 1530 case CXt_NULL:
a0d0e21e 1531 break;
7766f137
GS
1532 case CXt_FORMAT:
1533 POPFORMAT(cx);
1534 break;
a0d0e21e 1535 }
c90c0ff4 1536 cxstack_ix--;
a0d0e21e 1537 }
1b6737cc 1538 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1539}
1540
5a844595
GS
1541void
1542Perl_qerror(pTHX_ SV *err)
1543{
97aff369 1544 dVAR;
7918f24d
NC
1545
1546 PERL_ARGS_ASSERT_QERROR;
1547
6b2fb389
DM
1548 if (PL_in_eval) {
1549 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF
1550 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1551 SVfARG(err));
6b2fb389
DM
1552 }
1553 else
1554 sv_catsv(ERRSV, err);
1555 }
5a844595
GS
1556 else if (PL_errors)
1557 sv_catsv(PL_errors, err);
1558 else
be2597df 1559 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1560 if (PL_parser)
1561 ++PL_parser->error_count;
5a844595
GS
1562}
1563
bb4c52e0 1564void
c5df3096 1565Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1566{
27da23d5 1567 dVAR;
c5df3096 1568 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1569 U8 in_eval = PL_in_eval;
c5df3096 1570 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1571
96d9b9cd 1572 if (in_eval) {
a0d0e21e 1573 I32 cxix;
a0d0e21e 1574 I32 gimme;
a0d0e21e 1575
22a30693
Z
1576 /*
1577 * Historically, perl used to set ERRSV ($@) early in the die
1578 * process and rely on it not getting clobbered during unwinding.
1579 * That sucked, because it was liable to get clobbered, so the
1580 * setting of ERRSV used to emit the exception from eval{} has
1581 * been moved to much later, after unwinding (see just before
1582 * JMPENV_JUMP below). However, some modules were relying on the
1583 * early setting, by examining $@ during unwinding to use it as
1584 * a flag indicating whether the current unwinding was caused by
1585 * an exception. It was never a reliable flag for that purpose,
1586 * being totally open to false positives even without actual
1587 * clobberage, but was useful enough for production code to
1588 * semantically rely on it.
1589 *
1590 * We'd like to have a proper introspective interface that
1591 * explicitly describes the reason for whatever unwinding
1592 * operations are currently in progress, so that those modules
1593 * work reliably and $@ isn't further overloaded. But we don't
1594 * have one yet. In its absence, as a stopgap measure, ERRSV is
1595 * now *additionally* set here, before unwinding, to serve as the
1596 * (unreliable) flag that it used to.
1597 *
1598 * This behaviour is temporary, and should be removed when a
1599 * proper way to detect exceptional unwinding has been developed.
1600 * As of 2010-12, the authors of modules relying on the hack
1601 * are aware of the issue, because the modules failed on
1602 * perls 5.13.{1..7} which had late setting of $@ without this
1603 * early-setting hack.
1604 */
1605 if (!(in_eval & EVAL_KEEPERR)) {
1606 SvTEMP_off(exceptsv);
1607 sv_setsv(ERRSV, exceptsv);
1608 }
1609
fc941f37
Z
1610 if (in_eval & EVAL_KEEPERR) {
1611 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1612 SVfARG(exceptsv));
1613 }
1614
5a844595
GS
1615 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1616 && PL_curstackinfo->si_prev)
1617 {
bac4b2ad 1618 dounwind(-1);
d3acc0f7 1619 POPSTACK;
bac4b2ad 1620 }
e336de0d 1621
a0d0e21e
LW
1622 if (cxix >= 0) {
1623 I32 optype;
b6494f15 1624 SV *namesv;
eb578fdb 1625 PERL_CONTEXT *cx;
901017d6 1626 SV **newsp;
8f89e5a9
Z
1627 COP *oldcop;
1628 JMPENV *restartjmpenv;
1629 OP *restartop;
a0d0e21e
LW
1630
1631 if (cxix < cxstack_ix)
1632 dounwind(cxix);
1633
3280af22 1634 POPBLOCK(cx,PL_curpm);
6b35e009 1635 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1636 STRLEN msglen;
96d9b9cd 1637 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1638 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1639 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1640 my_exit(1);
1641 }
1642 POPEVAL(cx);
b6494f15 1643 namesv = cx->blk_eval.old_namesv;
8f89e5a9
Z
1644 oldcop = cx->blk_oldcop;
1645 restartjmpenv = cx->blk_eval.cur_top_env;
1646 restartop = cx->blk_eval.retop;
a0d0e21e
LW
1647
1648 if (gimme == G_SCALAR)
3280af22
NIS
1649 *++newsp = &PL_sv_undef;
1650 PL_stack_sp = newsp;
a0d0e21e
LW
1651
1652 LEAVE;
748a9306 1653
7fb6a879
GS
1654 /* LEAVE could clobber PL_curcop (see save_re_context())
1655 * XXX it might be better to find a way to avoid messing with
1656 * PL_curcop in save_re_context() instead, but this is a more
1657 * minimal fix --GSAR */
8f89e5a9 1658 PL_curcop = oldcop;
7fb6a879 1659
7a2e2cd6 1660 if (optype == OP_REQUIRE) {
b6494f15 1661 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1662 SvPVX_const(namesv),
c60dbbc3 1663 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1664 &PL_sv_undef, 0);
27e90453
DM
1665 /* note that unlike pp_entereval, pp_require isn't
1666 * supposed to trap errors. So now that we've popped the
1667 * EVAL that pp_require pushed, and processed the error
1668 * message, rethrow the error */
ecad31f0
BF
1669 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1670 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1671 SVs_TEMP)));
7a2e2cd6 1672 }
fc941f37 1673 if (!(in_eval & EVAL_KEEPERR))
96d9b9cd 1674 sv_setsv(ERRSV, exceptsv);
8f89e5a9
Z
1675 PL_restartjmpenv = restartjmpenv;
1676 PL_restartop = restartop;
bb4c52e0 1677 JMPENV_JUMP(3);
118e2215 1678 assert(0); /* NOTREACHED */
a0d0e21e
LW
1679 }
1680 }
87582a92 1681
96d9b9cd 1682 write_to_stderr(exceptsv);
f86702cc 1683 my_failure_exit();
118e2215 1684 assert(0); /* NOTREACHED */
a0d0e21e
LW
1685}
1686
1687PP(pp_xor)
1688{
97aff369 1689 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1690 if (SvTRUE(left) != SvTRUE(right))
1691 RETSETYES;
1692 else
1693 RETSETNO;
1694}
1695
8dff4fc5
BM
1696/*
1697=for apidoc caller_cx
1698
1699The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
1700returned C<PERL_CONTEXT> structure can be interrogated to find all the
1701information returned to Perl by C<caller>. Note that XSUBs don't get a
1702stack frame, so C<caller_cx(0, NULL)> will return information for the
1703immediately-surrounding Perl code.
1704
1705This function skips over the automatic calls to C<&DB::sub> made on the
1706behalf of the debugger. If the stack frame requested was a sub called by
1707C<DB::sub>, the return value will be the frame for the call to
1708C<DB::sub>, since that has the correct line number/etc. for the call
1709site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
1710frame for the sub call itself.
1711
1712=cut
1713*/
1714
1715const PERL_CONTEXT *
1716Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1717{
eb578fdb
KW
1718 I32 cxix = dopoptosub(cxstack_ix);
1719 const PERL_CONTEXT *cx;
1720 const PERL_CONTEXT *ccstack = cxstack;
901017d6 1721 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1722
a0d0e21e 1723 for (;;) {
2c375eb9
GS
1724 /* we may be in a higher stacklevel, so dig down deeper */
1725 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1726 top_si = top_si->si_prev;
1727 ccstack = top_si->si_cxstack;
1728 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1729 }
8dff4fc5
BM
1730 if (cxix < 0)
1731 return NULL;
f2a7f298 1732 /* caller() should not report the automatic calls to &DB::sub */
1733 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1734 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1735 count++;
1736 if (!count--)
1737 break;
2c375eb9 1738 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1739 }
2c375eb9
GS
1740
1741 cx = &ccstack[cxix];
8dff4fc5
BM
1742 if (dbcxp) *dbcxp = cx;
1743
7766f137 1744 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1745 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1746 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1747 field below is defined for any cx. */
f2a7f298 1748 /* caller() should not report the automatic calls to &DB::sub */
1749 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1750 cx = &ccstack[dbcxix];
06a5b730
PP
1751 }
1752
8dff4fc5
BM
1753 return cx;
1754}
1755
1756PP(pp_caller)
1757{
1758 dVAR;
1759 dSP;
eb578fdb 1760 const PERL_CONTEXT *cx;
8dff4fc5
BM
1761 const PERL_CONTEXT *dbcx;
1762 I32 gimme;
d527ce7c 1763 const HEK *stash_hek;
8dff4fc5 1764 I32 count = 0;
ce0b554b 1765 bool has_arg = MAXARG && TOPs;
25502127 1766 const COP *lcop;
8dff4fc5 1767
ce0b554b
FC
1768 if (MAXARG) {
1769 if (has_arg)
8dff4fc5 1770 count = POPi;
ce0b554b
FC
1771 else (void)POPs;
1772 }
8dff4fc5 1773
ce0b554b 1774 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5
BM
1775 if (!cx) {
1776 if (GIMME != G_ARRAY) {
1777 EXTEND(SP, 1);
1778 RETPUSHUNDEF;
1779 }
1780 RETURN;
1781 }
1782
fb55feef 1783 DEBUG_CX("CALLER");
d0279c7c 1784 assert(CopSTASH(cx->blk_oldcop));
e7886211
FC
1785 stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV
1786 ? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop))
1787 : NULL;
a0d0e21e 1788 if (GIMME != G_ARRAY) {
27d41816 1789 EXTEND(SP, 1);
d527ce7c 1790 if (!stash_hek)
3280af22 1791 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1792 else {
1793 dTARGET;
d527ce7c 1794 sv_sethek(TARG, stash_hek);
49d8d3a1
MB
1795 PUSHs(TARG);
1796 }
a0d0e21e
LW
1797 RETURN;
1798 }
a0d0e21e 1799
b3ca2e83 1800 EXTEND(SP, 11);
27d41816 1801
d527ce7c 1802 if (!stash_hek)
3280af22 1803 PUSHs(&PL_sv_undef);
d527ce7c
BF
1804 else {
1805 dTARGET;
1806 sv_sethek(TARG, stash_hek);
1807 PUSHTARG;
1808 }
6e449a3a 1809 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
25502127
FC
1810 lcop = closest_cop(cx->blk_oldcop, cx->blk_oldcop->op_sibling,
1811 cx->blk_sub.retop, TRUE);
1812 if (!lcop)
1813 lcop = cx->blk_oldcop;
1814 mPUSHi((I32)CopLINE(lcop));
ce0b554b 1815 if (!has_arg)
a0d0e21e 1816 RETURN;
7766f137 1817 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
8dff4fc5 1818 GV * const cvgv = CvGV(dbcx->blk_sub.cv);
7766f137 1819 /* So is ccstack[dbcxix]. */
81ed78b2 1820 if (cvgv && isGV(cvgv)) {
561b68a9 1821 SV * const sv = newSV(0);
c445ea15 1822 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1823 mPUSHs(sv);
bf38a478 1824 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1825 }
1826 else {
84bafc02 1827 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1828 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1829 }
a0d0e21e
LW
1830 }
1831 else {
84bafc02 1832 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1833 mPUSHi(0);
a0d0e21e 1834 }
54310121
PP
1835 gimme = (I32)cx->blk_gimme;
1836 if (gimme == G_VOID)
3280af22 1837 PUSHs(&PL_sv_undef);
54310121 1838 else
98625aca 1839 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1840 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1841 /* eval STRING */
85a64632 1842 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
19bcb54e
FC
1843 PUSHs(newSVpvn_flags(SvPVX(cx->blk_eval.cur_text),
1844 SvCUR(cx->blk_eval.cur_text)-2,
1845 SvUTF8(cx->blk_eval.cur_text)|SVs_TEMP));
3280af22 1846 PUSHs(&PL_sv_no);
0f79a09d 1847 }
811a4de9 1848 /* require */
0f79a09d 1849 else if (cx->blk_eval.old_namesv) {
6e449a3a 1850 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1851 PUSHs(&PL_sv_yes);
06a5b730 1852 }
811a4de9
GS
1853 /* eval BLOCK (try blocks have old_namesv == 0) */
1854 else {
1855 PUSHs(&PL_sv_undef);
1856 PUSHs(&PL_sv_undef);
1857 }
4633a7c4 1858 }
a682de96
GS
1859 else {
1860 PUSHs(&PL_sv_undef);
1861 PUSHs(&PL_sv_undef);
1862 }
bafb2adc 1863 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1864 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1865 {
66a1b24b 1866 AV * const ary = cx->blk_sub.argarray;
c70927a6 1867 const SSize_t off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1868
e1a80902 1869 Perl_init_dbargs(aTHX);
a0d0e21e 1870
3280af22
NIS
1871 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1872 av_extend(PL_dbargs, AvFILLp(ary) + off);
1873 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1874 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1875 }
6e449a3a 1876 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1877 {
1878 SV * mask ;
72dc9ed5 1879 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1880
f07626ad 1881 if (old_warnings == pWARN_NONE)
e476b1b5 1882 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
f07626ad
FC
1883 else if (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0)
1884 mask = &PL_sv_undef ;
ac27b0f5 1885 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1886 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1887 /* Get the bit mask for $warnings::Bits{all}, because
1888 * it could have been extended by warnings::register */
1889 SV **bits_all;
6673a63c 1890 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1891 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1892 mask = newSVsv(*bits_all);
1893 }
1894 else {
1895 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1896 }
1897 }
e476b1b5 1898 else
72dc9ed5 1899 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1900 mPUSHs(mask);
e476b1b5 1901 }
b3ca2e83 1902
c28fe1ec 1903 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 1904 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 1905 : &PL_sv_undef);
a0d0e21e
LW
1906 RETURN;
1907}
1908
a0d0e21e
LW
1909PP(pp_reset)
1910{
97aff369 1911 dVAR;
39644a26 1912 dSP;
ca826051
FC
1913 const char * tmps;
1914 STRLEN len = 0;
1915 if (MAXARG < 1 || (!TOPs && !POPs))
1916 tmps = NULL, len = 0;
1917 else
1918 tmps = SvPVx_const(POPs, len);
1919 sv_resetpvn(tmps, len, CopSTASH(PL_curcop));
3280af22 1920 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1921 RETURN;
1922}
1923
dd2155a4
DM
1924/* like pp_nextstate, but used instead when the debugger is active */
1925
a0d0e21e
LW
1926PP(pp_dbstate)
1927{
27da23d5 1928 dVAR;
533c011a 1929 PL_curcop = (COP*)PL_op;
a0d0e21e 1930 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1931 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1932 FREETMPS;
1933
f410a211
NC
1934 PERL_ASYNC_CHECK();
1935
5df8de69
DM
1936 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1937 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1938 {
39644a26 1939 dSP;
eb578fdb 1940 PERL_CONTEXT *cx;
f54cb97a 1941 const I32 gimme = G_ARRAY;
eb160463 1942 U8 hasargs;
0bd48802 1943 GV * const gv = PL_DBgv;
432d4561
JL
1944 CV * cv = NULL;
1945
1946 if (gv && isGV_with_GP(gv))
1947 cv = GvCV(gv);
a0d0e21e 1948
c2cb6f77 1949 if (!cv || (!CvROOT(cv) && !CvXSUB(cv)))
cea2e8a9 1950 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1951
aea4f609
DM
1952 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1953 /* don't do recursive DB::DB call */
a0d0e21e 1954 return NORMAL;
748a9306 1955
a57c6685 1956 ENTER;
4633a7c4
LW
1957 SAVETMPS;
1958
3280af22 1959 SAVEI32(PL_debug);
55497cff 1960 SAVESTACK_POS();
3280af22 1961 PL_debug = 0;
748a9306 1962 hasargs = 0;
924508f0 1963 SPAGAIN;
748a9306 1964
aed2304a 1965 if (CvISXSUB(cv)) {
c127bd3a
SF
1966 PUSHMARK(SP);
1967 (void)(*CvXSUB(cv))(aTHX_ cv);
c127bd3a 1968 FREETMPS;
a57c6685 1969 LEAVE;
c127bd3a
SF
1970 return NORMAL;
1971 }
1972 else {
1973 PUSHBLOCK(cx, CXt_SUB, SP);
1974 PUSHSUB_DB(cx);
1975 cx->blk_sub.retop = PL_op->op_next;
1976 CvDEPTH(cv)++;
9d976ff5
FC
1977 if (CvDEPTH(cv) >= 2) {
1978 PERL_STACK_OVERFLOW_CHECK();
1979 pad_push(CvPADLIST(cv), CvDEPTH(cv));
1980 }
c127bd3a 1981 SAVECOMPPAD();
9d976ff5 1982 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), CvDEPTH(cv));
c127bd3a
SF
1983 RETURNOP(CvSTART(cv));
1984 }
a0d0e21e
LW
1985 }
1986 else
1987 return NORMAL;
1988}
1989
2ec7f6f2
FC
1990/* SVs on the stack that have any of the flags passed in are left as is.
1991 Other SVs are protected via the mortals stack if lvalue is true, and
1992 copied otherwise. */
1993
b9d76716 1994STATIC SV **
2ec7f6f2
FC
1995S_adjust_stack_on_leave(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme,
1996 U32 flags, bool lvalue)
b9d76716 1997{
9a214eec 1998 bool padtmp = 0;
b9d76716
VP
1999 PERL_ARGS_ASSERT_ADJUST_STACK_ON_LEAVE;
2000
9a214eec
DM
2001 if (flags & SVs_PADTMP) {
2002 flags &= ~SVs_PADTMP;
2003 padtmp = 1;
2004 }
b9d76716
VP
2005 if (gimme == G_SCALAR) {
2006 if (MARK < SP)
9a214eec 2007 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2ec7f6f2
FC
2008 ? *SP
2009 : lvalue
2010 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2011 : 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 {
2ec7f6f2
FC
2026 *++newsp = lvalue
2027 ? sv_2mortal(SvREFCNT_inc_simple_NN(*MARK))
2028 : sv_mortalcopy(*MARK);
b9d76716
VP
2029 TAINT_NOT; /* Each item is independent */
2030 }
2031 }
2032 /* When this function was called with MARK == newsp, we reach this
2033 * point with SP == newsp. */
2034 }
2035
2036 return newsp;
2037}
2038
2b9a6457
VP
2039PP(pp_enter)
2040{
2041 dVAR; dSP;
eb578fdb 2042 PERL_CONTEXT *cx;
7c2d9d03 2043 I32 gimme = GIMME_V;
2b9a6457
VP
2044
2045 ENTER_with_name("block");
2046
2047 SAVETMPS;
2048 PUSHBLOCK(cx, CXt_BLOCK, SP);
2049
2050 RETURN;
2051}
2052
2053PP(pp_leave)
2054{
2055 dVAR; dSP;
eb578fdb 2056 PERL_CONTEXT *cx;
2b9a6457
VP
2057 SV **newsp;
2058 PMOP *newpm;
2059 I32 gimme;
2060
2061 if (PL_op->op_flags & OPf_SPECIAL) {
2062 cx = &cxstack[cxstack_ix];
2063 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2064 }
2065
2066 POPBLOCK(cx,newpm);
2067
2068 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2069
2070 TAINT_NOT;
2ec7f6f2
FC
2071 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP,
2072 PL_op->op_private & OPpLVALUE);
2b9a6457
VP
2073 PL_curpm = newpm; /* Don't pop $1 et al till now */
2074
2075 LEAVE_with_name("block");
2076
2077 RETURN;
2078}
2079
a0d0e21e
LW
2080PP(pp_enteriter)
2081{
27da23d5 2082 dVAR; dSP; dMARK;
eb578fdb 2083 PERL_CONTEXT *cx;
f54cb97a 2084 const I32 gimme = GIMME_V;
df530c37 2085 void *itervar; /* location of the iteration variable */
840fe433 2086 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2087
d343c3ef 2088 ENTER_with_name("loop1");
4633a7c4
LW
2089 SAVETMPS;
2090
aafca525
DM
2091 if (PL_op->op_targ) { /* "my" variable */
2092 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM
2093 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2094 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2095 SVs_PADSTALE, SVs_PADSTALE);
2096 }
09edbca0 2097 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
89e00a7c 2098#ifdef USE_ITHREADS
df530c37 2099 itervar = PL_comppad;
89e00a7c 2100#else
aafca525 2101 itervar = &PAD_SVl(PL_op->op_targ);
7766f137 2102#endif
54b9620d 2103 }
aafca525 2104 else { /* symbol table variable */
159b6efe 2105 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM
2106 SV** svp = &GvSV(gv);
2107 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2108 *svp = newSV(0);
df530c37 2109 itervar = (void *)gv;
54b9620d 2110 }
4633a7c4 2111
0d863452
RH
2112 if (PL_op->op_private & OPpITER_DEF)
2113 cxtype |= CXp_FOR_DEF;
2114
d343c3ef 2115 ENTER_with_name("loop2");
a0d0e21e 2116
7766f137 2117 PUSHBLOCK(cx, cxtype, SP);
df530c37 2118 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2119 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
2120 SV *maybe_ary = POPs;
2121 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2122 dPOPss;
d01136d6 2123 SV * const right = maybe_ary;
984a4bea
RD
2124 SvGETMAGIC(sv);
2125 SvGETMAGIC(right);
4fe3f0fa 2126 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2127 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
2128 cx->cx_type |= CXt_LOOP_LAZYIV;
2129 /* Make sure that no-one re-orders cop.h and breaks our
2130 assumptions */
2131 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040 2132#ifdef NV_PRESERVES_UV
f52e41ad
FC
2133 if ((SvOK(sv) && ((SvNV_nomg(sv) < (NV)IV_MIN) ||
2134 (SvNV_nomg(sv) > (NV)IV_MAX)))
a2309040 2135 ||
f52e41ad
FC
2136 (SvOK(right) && ((SvNV_nomg(right) > (NV)IV_MAX) ||
2137 (SvNV_nomg(right) < (NV)IV_MIN))))
a2309040 2138#else
f52e41ad 2139 if ((SvOK(sv) && ((SvNV_nomg(sv) <= (NV)IV_MIN)
a2309040 2140 ||
f52e41ad
FC
2141 ((SvNV_nomg(sv) > 0) &&
2142 ((SvUV_nomg(sv) > (UV)IV_MAX) ||
2143 (SvNV_nomg(sv) > (NV)UV_MAX)))))
a2309040 2144 ||
f52e41ad 2145 (SvOK(right) && ((SvNV_nomg(right) <= (NV)IV_MIN)
a2309040 2146 ||
f52e41ad
FC
2147 ((SvNV_nomg(right) > 0) &&
2148 ((SvUV_nomg(right) > (UV)IV_MAX) ||
2149 (SvNV_nomg(right) > (NV)UV_MAX))
2150 ))))
a2309040 2151#endif
076d9a11 2152 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC
2153 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2154 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM
2155#ifdef DEBUGGING
2156 /* for correct -Dstv display */
2157 cx->blk_oldsp = sp - PL_stack_base;
2158#endif
89ea2908 2159 }
3f63a782 2160 else {
d01136d6
BS
2161 cx->cx_type &= ~CXTYPEMASK;
2162 cx->cx_type |= CXt_LOOP_LAZYSV;
2163 /* Make sure that no-one re-orders cop.h and breaks our
2164 assumptions */
2165 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2166 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2167 cx->blk_loop.state_u.lazysv.end = right;
2168 SvREFCNT_inc(right);
2169 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
2170 /* This will do the upgrade to SVt_PV, and warn if the value
2171 is uninitialised. */
10516c54 2172 (void) SvPV_nolen_const(right);
267cc4a8
NC
2173 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2174 to replace !SvOK() with a pointer to "". */
2175 if (!SvOK(right)) {
2176 SvREFCNT_dec(right);
d01136d6 2177 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2178 }
3f63a782 2179 }
89ea2908 2180 }
d01136d6 2181 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2182 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
2183 SvREFCNT_inc(maybe_ary);
2184 cx->blk_loop.state_u.ary.ix =
2185 (PL_op->op_private & OPpITER_REVERSED) ?
2186 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2187 -1;
ef3e5ea9 2188 }
89ea2908 2189 }
d01136d6
BS
2190 else { /* iterating over items on the stack */
2191 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2192 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2193 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
2194 }
2195 else {
d01136d6 2196 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2197 }
4633a7c4 2198 }
a0d0e21e
LW
2199
2200 RETURN;
2201}
2202
2203PP(pp_enterloop)
2204{
27da23d5 2205 dVAR; dSP;
eb578fdb 2206 PERL_CONTEXT *cx;
f54cb97a 2207 const I32 gimme = GIMME_V;
a0d0e21e 2208
d343c3ef 2209 ENTER_with_name("loop1");
a0d0e21e 2210 SAVETMPS;
d343c3ef 2211 ENTER_with_name("loop2");
a0d0e21e 2212
3b719c58
NC
2213 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2214 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2215
2216 RETURN;
2217}
2218
2219PP(pp_leaveloop)
2220{
27da23d5 2221 dVAR; dSP;
eb578fdb 2222 PERL_CONTEXT *cx;
a0d0e21e
LW
2223 I32 gimme;
2224 SV **newsp;
2225 PMOP *newpm;
2226 SV **mark;
2227
2228 POPBLOCK(cx,newpm);
3b719c58 2229 assert(CxTYPE_is_LOOP(cx));
4fdae800 2230 mark = newsp;
a8bba7fa 2231 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2232
a1f49e72 2233 TAINT_NOT;
a373464f
FC
2234 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme, 0,
2235 PL_op->op_private & OPpLVALUE);
f86702cc
PP
2236 PUTBACK;
2237
a8bba7fa 2238 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2239 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2240
d343c3ef
GG
2241 LEAVE_with_name("loop2");
2242 LEAVE_with_name("loop1");
a0d0e21e 2243
f86702cc 2244 return NORMAL;
a0d0e21e
LW
2245}
2246
3bdf583b
FC
2247STATIC void
2248S_return_lvalues(pTHX_ SV **mark, SV **sp, SV **newsp, I32 gimme,
d25b0d7b 2249 PERL_CONTEXT *cx, PMOP *newpm)
3bdf583b 2250{
80422e24 2251 const bool ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2252 if (gimme == G_SCALAR) {
d25b0d7b
FC
2253 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2254 SV *sv;
001de122 2255 const char *what = NULL;
d25b0d7b
FC
2256 if (MARK < SP) {
2257 assert(MARK+1 == SP);
2258 if ((SvPADTMP(TOPs) ||
2259 (SvFLAGS(TOPs) & (SVf_READONLY | SVf_FAKE))
2260 == SVf_READONLY
2261 ) &&
2262 !SvSMAGICAL(TOPs)) {
001de122 2263 what =
d25b0d7b 2264 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2265 : "a readonly value" : "a temporary";
d25b0d7b 2266 }
001de122 2267 else goto copy_sv;
d25b0d7b
FC
2268 }
2269 else {
2270 /* sub:lvalue{} will take us here. */
001de122 2271 what = "undef";
d25b0d7b 2272 }
001de122
FC
2273 LEAVE;
2274 cxstack_ix--;
2275 POPSUB(cx,sv);
2276 PL_curpm = newpm;
2277 LEAVESUB(sv);
2278 Perl_croak(aTHX_
2279 "Can't return %s from lvalue subroutine", what
2280 );
d25b0d7b 2281 }
93905212 2282 if (MARK < SP) {
a5ad7a5a 2283 copy_sv:
3bdf583b 2284 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
5811c07e 2285 if (!SvPADTMP(*SP)) {
3bdf583b
FC
2286 *++newsp = SvREFCNT_inc(*SP);
2287 FREETMPS;
2288 sv_2mortal(*newsp);
5811c07e
FC
2289 }
2290 else {
2291 /* FREETMPS could clobber it */
2292 SV *sv = SvREFCNT_inc(*SP);
2293 FREETMPS;
2294 *++newsp = sv_mortalcopy(sv);
2295 SvREFCNT_dec(sv);
2296 }
3bdf583b
FC
2297 }
2298 else
e08be60b 2299 *++newsp =
5811c07e
FC
2300 SvPADTMP(*SP)
2301 ? sv_mortalcopy(*SP)
2302 : !SvTEMP(*SP)
e08be60b
FC
2303 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2304 : *SP;
3bdf583b 2305 }
0d235c77
FC
2306 else {
2307 EXTEND(newsp,1);
3bdf583b 2308 *++newsp = &PL_sv_undef;
0d235c77 2309 }
0e9700df 2310 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC
2311 SvGETMAGIC(TOPs);
2312 if (!SvOK(TOPs)) {
0e9700df 2313 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC
2314 }
2315 }
3bdf583b
FC
2316 }
2317 else if (gimme == G_ARRAY) {
0e9700df 2318 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2319 if (ref || !CxLVAL(cx))
e08be60b
FC
2320 while (++MARK <= SP)
2321 *++newsp =
5811c07e 2322 SvFLAGS(*MARK) & SVs_PADTMP
80422e24 2323 ? sv_mortalcopy(*MARK)
5811c07e
FC
2324 : SvTEMP(*MARK)
2325 ? *MARK
80422e24 2326 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e08be60b 2327 else while (++MARK <= SP) {
d25b0d7b
FC
2328 if (*MARK != &PL_sv_undef
2329 && (SvPADTMP(*MARK)
2330 || (SvFLAGS(*MARK) & (SVf_READONLY|SVf_FAKE))
2331 == SVf_READONLY
2332 )
2333 ) {
2334 SV *sv;
2335 /* Might be flattened array after $#array = */
2336 PUTBACK;
2337 LEAVE;
2338 cxstack_ix--;
2339 POPSUB(cx,sv);
2340 PL_curpm = newpm;
2341 LEAVESUB(sv);
ae917476 2342 /* diag_listed_as: Can't return %s from lvalue subroutine */
d25b0d7b
FC
2343 Perl_croak(aTHX_
2344 "Can't return a %s from lvalue subroutine",
2345 SvREADONLY(TOPs) ? "readonly value" : "temporary");
2346 }
2347 else
4bee03f8
FC
2348 *++newsp =
2349 SvTEMP(*MARK)
2350 ? *MARK
2351 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC
2352 }
2353 }
2354 PL_stack_sp = newsp;
2355}
2356
a0d0e21e
LW
2357PP(pp_return)
2358{
27da23d5 2359 dVAR; dSP; dMARK;
eb578fdb 2360 PERL_CONTEXT *cx;
f86702cc 2361 bool popsub2 = FALSE;
b45de488 2362 bool clear_errsv = FALSE;
fa1e92c4 2363 bool lval = FALSE;
a0d0e21e
LW
2364 I32 gimme;
2365 SV **newsp;
2366 PMOP *newpm;
2367 I32 optype = 0;
b6494f15 2368 SV *namesv;
b0d9ce38 2369 SV *sv;
b263a1ad 2370 OP *retop = NULL;
a0d0e21e 2371
0bd48802
AL
2372 const I32 cxix = dopoptosub(cxstack_ix);
2373
9850bf21
RH
2374 if (cxix < 0) {
2375 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2376 * sort block, which is a CXt_NULL
2377 * not a CXt_SUB */
2378 dounwind(0);
d7507f74
RH
2379 PL_stack_base[1] = *PL_stack_sp;
2380 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2381 return 0;
2382 }
9850bf21
RH
2383 else
2384 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2385 }
a0d0e21e
LW
2386 if (cxix < cxstack_ix)
2387 dounwind(cxix);
2388
d7507f74
RH
2389 if (CxMULTICALL(&cxstack[cxix])) {
2390 gimme = cxstack[cxix].blk_gimme;
2391 if (gimme == G_VOID)
2392 PL_stack_sp = PL_stack_base;
2393 else if (gimme == G_SCALAR) {
2394 PL_stack_base[1] = *PL_stack_sp;
2395 PL_stack_sp = PL_stack_base + 1;
2396 }
9850bf21 2397 return 0;
d7507f74 2398 }
9850bf21 2399
a0d0e21e 2400 POPBLOCK(cx,newpm);
6b35e009 2401 switch (CxTYPE(cx)) {
a0d0e21e 2402 case CXt_SUB:
f86702cc 2403 popsub2 = TRUE;
fa1e92c4 2404 lval = !!CvLVALUE(cx->blk_sub.cv);
f39bc417 2405 retop = cx->blk_sub.retop;
5dd42e15 2406 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2407 break;
2408 case CXt_EVAL:
b45de488
GS
2409 if (!(PL_in_eval & EVAL_KEEPERR))
2410 clear_errsv = TRUE;
a0d0e21e 2411 POPEVAL(cx);
b6494f15 2412 namesv = cx->blk_eval.old_namesv;
f39bc417 2413 retop = cx->blk_eval.retop;
1d76a5c3
GS
2414 if (CxTRYBLOCK(cx))
2415 break;
748a9306
LW
2416 if (optype == OP_REQUIRE &&
2417 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2418 {
54310121 2419 /* Unassume the success we assumed earlier. */
b6494f15 2420 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 2421 SvPVX_const(namesv),
c60dbbc3 2422 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15
VP
2423 G_DISCARD);
2424 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
748a9306 2425 }
a0d0e21e 2426 break;
7766f137 2427 case CXt_FORMAT:
f39bc417 2428 retop = cx->blk_sub.retop;
25375124 2429 POPFORMAT(cx);
7766f137 2430 break;
a0d0e21e 2431 default:
5637ef5b 2432 DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW
2433 }
2434
a1f49e72 2435 TAINT_NOT;
d25b0d7b 2436 if (lval) S_return_lvalues(aTHX_ MARK, SP, newsp, gimme, cx, newpm);
3bdf583b
FC
2437 else {
2438 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2439 if (MARK < SP) {
2440 if (popsub2) {
a8bba7fa 2441 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
6f48390a
FC
2442 if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1
2443 && !SvMAGICAL(TOPs)) {
a29cdaf0
IZ
2444 *++newsp = SvREFCNT_inc(*SP);
2445 FREETMPS;
2446 sv_2mortal(*newsp);
959e3673
GS
2447 }
2448 else {
2449 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2450 FREETMPS;
959e3673
GS
2451 *++newsp = sv_mortalcopy(sv);
2452 SvREFCNT_dec(sv);
a29cdaf0 2453 }
959e3673 2454 }
6f48390a
FC
2455 else if (SvTEMP(*SP) && SvREFCNT(*SP) == 1
2456 && !SvMAGICAL(*SP)) {
767eda44 2457 *++newsp = *SP;
767eda44 2458 }
959e3673 2459 else
767eda44 2460 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2461 }
2462 else
a29cdaf0 2463 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2464 }
2465 else
3280af22 2466 *++newsp = &PL_sv_undef;
3bdf583b
FC
2467 }
2468 else if (gimme == G_ARRAY) {
a1f49e72 2469 while (++MARK <= SP) {
3ed94dc0 2470 *++newsp = popsub2 && SvTEMP(*MARK) && SvREFCNT(*MARK) == 1
6f48390a 2471 && !SvGMAGICAL(*MARK)
f86702cc 2472 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2473 TAINT_NOT; /* Each item is independent */
2474 }
3bdf583b
FC
2475 }
2476 PL_stack_sp = newsp;
a0d0e21e 2477 }
a0d0e21e 2478
5dd42e15 2479 LEAVE;
f86702cc
PP
2480 /* Stack values are safe: */
2481 if (popsub2) {
5dd42e15 2482 cxstack_ix--;
b0d9ce38 2483 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2484 }
b0d9ce38 2485 else
c445ea15 2486 sv = NULL;
3280af22 2487 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2488
b0d9ce38 2489 LEAVESUB(sv);
8433848b 2490 if (clear_errsv) {
ab69dbc2 2491 CLEAR_ERRSV();
8433848b 2492 }
f39bc417 2493 return retop;
a0d0e21e
LW
2494}
2495
4f443c3d
FC
2496/* This duplicates parts of pp_leavesub, so that it can share code with
2497 * pp_return */
2498PP(pp_leavesublv)
2499{
2500 dVAR; dSP;
4f443c3d
FC
2501 SV **newsp;
2502 PMOP *newpm;
2503 I32 gimme;
eb578fdb 2504 PERL_CONTEXT *cx;
4f443c3d
FC
2505 SV *sv;
2506
2507 if (CxMULTICALL(&cxstack[cxstack_ix]))
2508 return 0;
2509
2510 POPBLOCK(cx,newpm);
2511 cxstack_ix++; /* temporarily protect top context */
4f443c3d
FC
2512
2513 TAINT_NOT;
2514
0d235c77 2515 S_return_lvalues(aTHX_ newsp, SP, newsp, gimme, cx, newpm);
4f443c3d
FC
2516
2517 LEAVE;
4f443c3d 2518 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
25375124 2519 cxstack_ix--;
4f443c3d
FC
2520 PL_curpm = newpm; /* ... and pop $1 et al */
2521
2522 LEAVESUB(sv);
2523 return cx->blk_sub.retop;
2524}
2525
1f039d60
FC
2526static I32
2527S_unwind_loop(pTHX_ const char * const opname)
a0d0e21e 2528{
1f039d60 2529 dVAR;
a0d0e21e 2530 I32 cxix;
1f039d60
FC
2531 if (PL_op->op_flags & OPf_SPECIAL) {
2532 cxix = dopoptoloop(cxstack_ix);
2533 if (cxix < 0)
2534 /* diag_listed_as: Can't "last" outside a loop block */
2535 Perl_croak(aTHX_ "Can't \"%s\" outside a loop block", opname);
2536 }
2537 else {
2538 dSP;
2539 STRLEN label_len;
2540 const char * const label =
2541 PL_op->op_flags & OPf_STACKED
2542 ? SvPV(TOPs,label_len)
2543 : (label_len = strlen(cPVOP->op_pv), cPVOP->op_pv);
2544 const U32 label_flags =
2545 PL_op->op_flags & OPf_STACKED
2546 ? SvUTF8(POPs)
2547 : (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2548 PUTBACK;
2549 cxix = dopoptolabel(label, label_len, label_flags);
2550 if (cxix < 0)
2551 /* diag_listed_as: Label not found for "last %s" */
2552 Perl_croak(aTHX_ "Label not found for \"%s %"SVf"\"",
2553 opname,
2554 SVfARG(PL_op->op_flags & OPf_STACKED
2555 && !SvGMAGICAL(TOPp1s)
2556 ? TOPp1s
2557 : newSVpvn_flags(label,
2558 label_len,
2559 label_flags | SVs_TEMP)));
2560 }
2561 if (cxix < cxstack_ix)
2562 dounwind(cxix);
2563 return cxix;
2564}
2565
2566PP(pp_last)
2567{
2568 dVAR;
eb578fdb 2569 PERL_CONTEXT *cx;
f86702cc 2570 I32 pop2 = 0;
a0d0e21e 2571 I32 gimme;
8772537c 2572 I32 optype;
b263a1ad 2573 OP *nextop = NULL;
a0d0e21e
LW
2574 SV **newsp;
2575 PMOP *newpm;
c445ea15 2576 SV *sv = NULL;
9d4ba2ae 2577
1f039d60 2578 S_unwind_loop(aTHX_ "last");
a0d0e21e
LW
2579
2580 POPBLOCK(cx,newpm);
5dd42e15 2581 cxstack_ix++; /* temporarily protect top context */
6b35e009 2582 switch (CxTYPE(cx)) {
c6fdafd0 2583 case CXt_LOOP_LAZYIV:
d01136d6 2584 case CXt_LOOP_LAZYSV:
3b719c58
NC
2585 case CXt_LOOP_FOR:
2586 case CXt_LOOP_PLAIN:
2587 pop2 = CxTYPE(cx);
a8bba7fa 2588 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2589 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2590 break;
f86702cc 2591 case CXt_SUB:
f86702cc 2592 pop2 = CXt_SUB;
f39bc417 2593 nextop = cx->blk_sub.retop;
a0d0e21e 2594 break;
f86702cc
PP
2595 case CXt_EVAL:
2596 POPEVAL(cx);
f39bc417 2597 nextop = cx->blk_eval.retop;
a0d0e21e 2598 break;
7766f137
GS
2599 case CXt_FORMAT:
2600 POPFORMAT(cx);
f39bc417 2601 nextop = cx->blk_sub.retop;
7766f137 2602 break;
a0d0e21e 2603 default:
5637ef5b 2604 DIE(aTHX_ "panic: last, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW
2605 }
2606
a1f49e72 2607 TAINT_NOT;
0c0c317c 2608 PL_stack_sp = newsp;
f86702cc 2609
5dd42e15
DM
2610 LEAVE;
2611 cxstack_ix--;
f86702cc
PP
2612 /* Stack values are safe: */
2613 switch (pop2) {
c6fdafd0 2614 case CXt_LOOP_LAZYIV:
3b719c58 2615 case CXt_LOOP_PLAIN:
d01136d6 2616 case CXt_LOOP_LAZYSV:
3b719c58 2617 case CXt_LOOP_FOR:
a8bba7fa 2618 POPLOOP(cx); /* release loop vars ... */
4fdae800 2619 LEAVE;
f86702cc
PP
2620 break;
2621 case CXt_SUB:
b0d9ce38 2622 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2623 break;
a0d0e21e 2624 }
3280af22 2625 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2626
b0d9ce38 2627 LEAVESUB(sv);
9d4ba2ae
AL
2628 PERL_UNUSED_VAR(optype);
2629 PERL_UNUSED_VAR(gimme);
f86702cc 2630 return nextop;
a0d0e21e
LW
2631}
2632
2633PP(pp_next)
2634{
27da23d5 2635 dVAR;
eb578fdb 2636 PERL_CONTEXT *cx;
1f039d60 2637 const I32 inner = PL_scopestack_ix;
a0d0e21e 2638
1f039d60 2639 S_unwind_loop(aTHX_ "next");
a0d0e21e 2640
85538317
GS
2641 /* clear off anything above the scope we're re-entering, but
2642 * save the rest until after a possible continue block */
1ba6ee2b 2643 TOPBLOCK(cx);
85538317
GS
2644 if (PL_scopestack_ix < inner)
2645 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2646 PL_curcop = cx->blk_oldcop;
47c9d59f 2647 PERL_ASYNC_CHECK();
d57ce4df 2648 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW
2649}
2650
2651PP(pp_redo)
2652{
27da23d5 2653 dVAR;
1f039d60 2654 const I32 cxix = S_unwind_loop(aTHX_ "redo");
eb578fdb 2655 PERL_CONTEXT *cx;
a0d0e21e 2656 I32 oldsave;
1f039d60 2657 OP* redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a0d0e21e 2658
a034e688
DM
2659 if (redo_op->op_type == OP_ENTER) {
2660 /* pop one less context to avoid $x being freed in while (my $x..) */
2661 cxstack_ix++;
2662 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2663 redo_op = redo_op->op_next;
2664 }
2665
a0d0e21e 2666 TOPBLOCK(cx);
3280af22 2667 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2668 LEAVE_SCOPE(oldsave);
936c78b5 2669 FREETMPS;
3a1b2b9e 2670 PL_curcop = cx->blk_oldcop;
47c9d59f 2671 PERL_ASYNC_CHECK();
a034e688 2672 return redo_op;
a0d0e21e
LW
2673}
2674
0824fdcb 2675STATIC OP *
5db1eb8d 2676S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit)
a0d0e21e 2677{
97aff369 2678 dVAR;
a0d0e21e 2679 OP **ops = opstack;
a1894d81 2680 static const char* const too_deep = "Target of goto is too deeply nested";
a0d0e21e 2681
7918f24d
NC
2682 PERL_ARGS_ASSERT_DOFINDLABEL;
2683
fc36a67e 2684 if (ops >= oplimit)
0157ef98 2685 Perl_croak(aTHX_ "%s", too_deep);
11343788
MB
2686 if (o->op_type == OP_LEAVE ||
2687 o->op_type == OP_SCOPE ||
2688 o->op_type == OP_LEAVELOOP ||
33d34e4c 2689 o->op_type == OP_LEAVESUB ||
11343788 2690 o->op_type == OP_LEAVETRY)
fc36a67e 2691 {
5dc0d613 2692 *ops++ = cUNOPo->op_first;
fc36a67e 2693 if (ops >= oplimit)
0157ef98 2694 Perl_croak(aTHX_ "%s", too_deep);
fc36a67e 2695 }
c4aa4e48 2696 *ops = 0;
11343788 2697 if (o->op_flags & OPf_KIDS) {
aec46f14 2698 OP *kid;
a0d0e21e 2699 /* First try all the kids at this level, since that's likeliest. */
11343788 2700 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac 2701 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
5db1eb8d
BF
2702 STRLEN kid_label_len;
2703 U32 kid_label_flags;
2704 const char *kid_label = CopLABEL_len_flags(kCOP,
2705 &kid_label_len, &kid_label_flags);
2706 if (kid_label && (
2707 ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
2708 (flags & SVf_UTF8)
2709 ? (bytes_cmp_utf8(
2710 (const U8*)kid_label, kid_label_len,
2711 (const U8*)label, len) == 0)
2712 : (bytes_cmp_utf8(
2713 (const U8*)label, len,
2714 (const U8*)kid_label, kid_label_len) == 0)
eade7155
BF
2715 : ( len == kid_label_len && ((kid_label == label)
2716 || memEQ(kid_label, label, len)))))
7e8f1eac
AD
2717 return kid;
2718 }
a0d0e21e 2719 }
11343788 2720 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2721 if (kid == PL_lastgotoprobe)
a0d0e21e 2722 continue;
ed8d0fe2
SM
2723 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2724 if (ops == opstack)
2725 *ops++ = kid;
2726 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2727 ops[-1]->op_type == OP_DBSTATE)
2728 ops[-1] = kid;
2729 else
2730 *ops++ = kid;
2731 }
5db1eb8d 2732 if ((o = dofindlabel(kid, label, len, flags, ops, oplimit)))
11343788 2733 return o;
a0d0e21e
LW
2734 }
2735 }
c4aa4e48 2736 *ops = 0;
a0d0e21e
LW
2737 return 0;
2738}
2739
7d1d69cb 2740PP(pp_goto) /* also pp_dump */
a0d0e21e 2741{
27da23d5 2742 dVAR; dSP;
cbbf8932 2743 OP *retop = NULL;
a0d0e21e 2744 I32 ix;
eb578fdb 2745 PERL_CONTEXT *cx;
fc36a67e
PP
2746#define GOTO_DEPTH 64
2747 OP *enterops[GOTO_DEPTH];
cbbf8932 2748 const char *label = NULL;
5db1eb8d
BF
2749 STRLEN label_len = 0;
2750 U32 label_flags = 0;
bfed75c6 2751 const bool do_dump = (PL_op->op_type == OP_DUMP);
a1894d81 2752 static const char* const must_have_label = "goto must have label";
a0d0e21e 2753
533c011a 2754 if (PL_op->op_flags & OPf_STACKED) {
7d1d69cb
DM
2755 /* goto EXPR or goto &foo */
2756
9d4ba2ae 2757 SV * const sv = POPs;
55b37f1c 2758 SvGETMAGIC(sv);
a0d0e21e
LW
2759
2760 /* This egregious kludge implements goto &subroutine */
2761 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2762 I32 cxix;
eb578fdb 2763 PERL_CONTEXT *cx;
ea726b52 2764 CV *cv = MUTABLE_CV(SvRV(sv));
049bd5ff 2765 AV *arg = GvAV(PL_defgv);
a0d0e21e
LW
2766 I32 oldsave;
2767
e8f7dd13 2768 retry:
4aa0a1f7 2769 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2770 const GV * const gv = CvGV(cv);
e8f7dd13 2771 if (gv) {
7fc63493 2772 GV *autogv;
e8f7dd13
GS
2773 SV *tmpstr;
2774 /* autoloaded stub? */
2775 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2776 goto retry;
c271df94
BF
2777 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2778 GvNAMELEN(gv),
2779 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS
2780 if (autogv && (cv = GvCV(autogv)))
2781 goto retry;
2782 tmpstr = sv_newmortal();
c445ea15 2783 gv_efullname3(tmpstr, gv, NULL);
be2597df 2784 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2785 }
cea2e8a9 2786 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2787 }
2788
a0d0e21e 2789 /* First do some returnish stuff. */
b37c2d43 2790 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2791 FREETMPS;
a0d0e21e 2792 cxix = dopoptosub(cxstack_ix);
8da3792e
SM
2793 if (cxix < cxstack_ix) {
2794 if (cxix < 0) {
2795 SvREFCNT_dec(cv);
2796 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2797 }
a0d0e21e 2798 dounwind(cxix);
8da3792e 2799 }
a0d0e21e 2800 TOPBLOCK(cx);
2d43a17f 2801 SPAGAIN;
564abe23 2802 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2803 if (CxTYPE(cx) == CXt_EVAL) {
110af908 2804 SvREFCNT_dec(cv);
c74ace89 2805 if (CxREALEVAL(cx))
00455a92 2806 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89
DM
2807 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2808 else
00455a92 2809 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89 2810 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2811 }
9850bf21 2812 else if (CxMULTICALL(cx))
110af908
FC
2813 {
2814 SvREFCNT_dec(cv);
9850bf21 2815 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
110af908 2816 }
bafb2adc 2817 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
a0d0e21e 2818 AV* av = cx->blk_sub.argarray;
bfed75c6 2819
049bd5ff
FC
2820 /* abandon the original @_ if it got reified or if it is
2821 the same as the current @_ */
2822 if (AvREAL(av) || av == arg) {
b1464ded 2823 SvREFCNT_dec(av);
d8b46c1b 2824 av = newAV();
11ca45c0 2825 AvREIFY_only(av);
ad64d0ec 2826 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2827 }
049bd5ff 2828 else CLEAR_ARGARRAY(av);
a0d0e21e 2829 }
049bd5ff
FC
2830 /* We donate this refcount later to the callee’s pad. */
2831 SvREFCNT_inc_simple_void(arg);
6b35e009 2832 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2833 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2834 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2835 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2836 LEAVE_SCOPE(oldsave);
2837
1d59c038
FC
2838 /* A destructor called during LEAVE_SCOPE could have undefined
2839 * our precious cv. See bug #99850. */
2840 if (!CvROOT(cv) && !CvXSUB(cv)) {
2841 const GV * const gv = CvGV(cv);
049bd5ff 2842 SvREFCNT_dec(arg);
1d59c038
FC
2843 if (gv) {
2844 SV * const tmpstr = sv_newmortal();
2845 gv_efullname3(tmpstr, gv, NULL);
2846 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",
2847 SVfARG(tmpstr));
2848 }
2849 DIE(aTHX_ "Goto undefined subroutine");
2850 }
2851
a0d0e21e
LW
2852 /* Now do some callish stuff. */
2853 SAVETMPS;
5023d17a 2854 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2855 if (CvISXSUB(cv)) {
b37c2d43 2856 OP* const retop = cx->blk_sub.retop;
cb65b687
DM
2857 SV **newsp;
2858 I32 gimme;
ad39f3a2 2859 const SSize_t items = arg ? AvFILL(arg) + 1 : 0;
cd313eb4 2860 const bool m = arg ? cBOOL(SvRMAGICAL(arg)) : 0;
049bd5ff
FC
2861 SV** mark;
2862
cb65b687
DM
2863 PERL_UNUSED_VAR(newsp);
2864 PERL_UNUSED_VAR(gimme);
2865
049bd5ff 2866 /* put GvAV(defgv) back onto stack */
8c9d3376
FC
2867 if (items) {
2868 EXTEND(SP, items+1); /* @_ could have been extended. */
8c9d3376 2869 }
049bd5ff 2870 mark = SP;
ad39f3a2 2871 if (items) {
de935cc9 2872 SSize_t index;
ad39f3a2 2873 bool r = cBOOL(AvREAL(arg));
b1464ded 2874 for (index=0; index<items; index++)
ad39f3a2
FC
2875 {
2876 SV *sv;
2877 if (m) {
2878 SV ** const svp = av_fetch(arg, index, 0);
2879 sv = svp ? *svp : NULL;
dd2a7f90 2880 }
ad39f3a2
FC
2881 else sv = AvARRAY(arg)[index];
2882 SP[index+1] = sv
2883 ? r ? SvREFCNT_inc_NN(sv_2mortal(sv)) : sv
2884 : sv_2mortal(newSVavdefelem(arg, index, 1));
2885 }
049bd5ff 2886 }
ad39f3a2 2887 SP += items;
049bd5ff
FC
2888 SvREFCNT_dec(arg);
2889 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
2890 /* Restore old @_ */
2891 arg = GvAV(PL_defgv);
2892 GvAV(PL_defgv) = cx->blk_sub.savearray;
2893 SvREFCNT_dec(arg);
b1464ded 2894 }
1fa4e549 2895
b37c2d43
AL
2896 /* XS subs don't have a CxSUB, so pop it */
2897 POPBLOCK(cx, PL_curpm);
2898 /* Push a mark for the start of arglist */
2899 PUSHMARK(mark);
2900 PUTBACK;
2901 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2902 LEAVE;
47c9d59f 2903 PERL_ASYNC_CHECK();
5eff7df7 2904 return retop;
a0d0e21e
LW
2905 }
2906 else {
b70d5558 2907 PADLIST * const padlist = CvPADLIST(cv);
a0d0e21e 2908 cx->blk_sub.cv = cv;
1a5b3db4 2909 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2910
a0d0e21e
LW
2911 CvDEPTH(cv)++;
2912 if (CvDEPTH(cv) < 2)
74c765eb 2913 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2914 else {
2b9dff67 2915 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2916 sub_crush_depth(cv);
26019298 2917 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2918 }
426a09cd 2919 PL_curcop = cx->blk_oldcop;
fd617465
DM
2920 SAVECOMPPAD();
2921 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2922 if (CxHASARGS(cx))
6d4ff0d2 2923 {
dd2155a4 2924 CX_CURPAD_SAVE(cx->blk_sub);
a0d0e21e 2925
049bd5ff
FC
2926 /* cx->blk_sub.argarray has no reference count, so we
2927 need something to hang on to our argument array so
2928 that cx->blk_sub.argarray does not end up pointing
2929 to freed memory as the result of undef *_. So put
2930 it in the callee’s pad, donating our refer-
2931 ence count. */
2932 SvREFCNT_dec(PAD_SVl(0));
2933 PAD_SVl(0) = (SV *)(cx->blk_sub.argarray = arg);
2934
2935 /* GvAV(PL_defgv) might have been modified on scope
2936 exit, so restore it. */
2937 if (arg != GvAV(PL_defgv)) {
2938 AV * const av = GvAV(PL_defgv);
2939 GvAV(PL_defgv) = (AV *)SvREFCNT_inc_simple(arg);
2940 SvREFCNT_dec(av);
a0d0e21e
LW
2941 }
2942 }
049bd5ff 2943 else SvREFCNT_dec(arg);
491527d0 2944 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2945 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2946 if (PERLDB_GOTO) {
b96d8cd9 2947 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2948 if (gotocv) {
2949 PUSHMARK( PL_stack_sp );
ad64d0ec 2950 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2951 PL_stack_sp--;
2952 }
491527d0 2953 }
1ce6579f 2954 }
47c9d59f 2955 PERL_ASYNC_CHECK();
a0d0e21e
LW
2956 RETURNOP(CvSTART(cv));
2957 }
2958 }
1614b0e3 2959 else {
7d1d69cb 2960 /* goto EXPR */
55b37f1c 2961 label = SvPV_nomg_const(sv, label_len);
5db1eb8d 2962 label_flags = SvUTF8(sv);
1614b0e3 2963 }
a0d0e21e 2964 }
2fc690dc 2965 else if (!(PL_op->op_flags & OPf_SPECIAL)) {
7d1d69cb 2966 /* goto LABEL or dump LABEL */
5db1eb8d
BF
2967 label = cPVOP->op_pv;
2968 label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2969 label_len = strlen(label);
2970 }
0157ef98 2971 if (!(do_dump || label_len)) DIE(aTHX_ "%s", must_have_label);
a0d0e21e 2972
f410a211
NC
2973 PERL_ASYNC_CHECK();
2974
3532f34a 2975 if (label_len) {
cbbf8932 2976 OP *gotoprobe = NULL;
3b2447bc 2977 bool leaving_eval = FALSE;
33d34e4c 2978 bool in_block = FALSE;
cbbf8932 2979 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2980
2981 /* find label */
2982
d4c19fe8 2983 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2984 *enterops = 0;
2985 for (ix = cxstack_ix; ix >= 0; ix--) {
2986 cx = &cxstack[ix];
6b35e009 2987 switch (CxTYPE(cx)) {
a0d0e21e 2988 case CXt_EVAL:
3b2447bc 2989 leaving_eval = TRUE;
971ecbe6 2990 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2991 gotoprobe = (last_eval_cx ?
2992 last_eval_cx->blk_eval.old_eval_root :
2993 PL_eval_root);
2994 last_eval_cx = cx;
9c5794fe
RH
2995 break;
2996 }
2997 /* else fall through */
c6fdafd0 2998 case CXt_LOOP_LAZYIV:
d01136d6 2999 case CXt_LOOP_LAZYSV:
3b719c58
NC
3000 case CXt_LOOP_FOR:
3001 case CXt_LOOP_PLAIN:
bb5aedc1
VP
3002 case CXt_GIVEN:
3003 case CXt_WHEN:
a0d0e21e
LW
3004 gotoprobe = cx->blk_oldcop->op_sibling;
3005 break;
3006 case CXt_SUBST:
3007 continue;
3008 case CXt_BLOCK:
33d34e4c 3009 if (ix) {
a0d0e21e 3010 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
3011 in_block = TRUE;
3012 } else
3280af22 3013 gotoprobe = PL_main_root;
a0d0e21e 3014 break;
b3933176 3015 case CXt_SUB:
9850bf21 3016 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
3017 gotoprobe = CvROOT(cx->blk_sub.cv);
3018 break;
3019 }
3020 /* FALL THROUGH */
7766f137 3021 case CXt_FORMAT:
0a753a76 3022 case CXt_NULL:
a651a37d 3023 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
3024 default:
3025 if (ix)
5637ef5b
NC
3026 DIE(aTHX_ "panic: goto, type=%u, ix=%ld",
3027 CxTYPE(cx), (long) ix);
3280af22 3028 gotoprobe = PL_main_root;
a0d0e21e
LW
3029 break;
3030 }
2b597662 3031 if (gotoprobe) {
5db1eb8d 3032 retop = dofindlabel(gotoprobe, label, label_len, label_flags,
2b597662
GS
3033 enterops, enterops + GOTO_DEPTH);
3034 if (retop)
3035 break;
eae48c89
Z
3036 if (gotoprobe->op_sibling &&
3037 gotoprobe->op_sibling->op_type == OP_UNSTACK &&
3038 gotoprobe->op_sibling->op_sibling) {
3039 retop = dofindlabel(gotoprobe->op_sibling->op_sibling,
5db1eb8d
BF
3040 label, label_len, label_flags, enterops,
3041 enterops + GOTO_DEPTH);
eae48c89
Z
3042 if (retop)
3043 break;
3044 }
2b597662 3045 }
3280af22 3046 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
3047 }
3048 if (!retop)
b17a0679
FC
3049 DIE(aTHX_ "Can't find label %"UTF8f,
3050 UTF8fARG(label_flags, label_len, label));
a0d0e21e 3051
3b2447bc
RH
3052 /* if we're leaving an eval, check before we pop any frames
3053 that we're not going to punt, otherwise the error
3054 won't be caught */
3055
3056 if (leaving_eval && *enterops && enterops[1]) {
3057 I32 i;
3058 for (i = 1; enterops[i]; i++)
3059 if (enterops[i]->op_type == OP_ENTERITER)
3060 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
3061 }
3062
b500e03b
GG
3063 if (*enterops && enterops[1]) {
3064 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3065 if (enterops[i])
3066 deprecate("\"goto\" to jump into a construct");
3067 }
3068
a0d0e21e
LW
3069 /* pop unwanted frames */
3070
3071 if (ix < cxstack_ix) {
3072 I32 oldsave;
3073
3074 if (ix < 0)
3075 ix = 0;
3076 dounwind(ix);
3077 TOPBLOCK(cx);
3280af22 3078 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
3079 LEAVE_SCOPE(oldsave);
3080 }
3081
3082 /* push wanted frames */
3083
748a9306 3084 if (*enterops && enterops[1]) {
0bd48802 3085 OP * const oldop = PL_op;
33d34e4c
AE
3086 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3087 for (; enterops[ix]; ix++) {
533c011a 3088 PL_op = enterops[ix];
84902520
TB
3089 /* Eventually we may want to stack the needed arguments
3090 * for each op. For now, we punt on the hard ones. */
533c011a 3091 if (PL_op->op_type == OP_ENTERITER)
894356b3 3092 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3093 PL_op->op_ppaddr(aTHX);
a0d0e21e 3094 }
533c011a 3095 PL_op = oldop;
a0d0e21e
LW
3096 }
3097 }
3098
3099 if (do_dump) {
a5f75d66 3100#ifdef VMS
6b88bc9c 3101 if (!retop) retop = PL_main_start;
a5f75d66 3102#endif
3280af22
NIS
3103 PL_restartop = retop;
3104 PL_do_undump = TRUE;
a0d0e21e
LW
3105
3106 my_unexec();
3107
3280af22
NIS
3108 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3109 PL_do_undump = FALSE;
a0d0e21e
LW
3110 }
3111
47c9d59f 3112 PERL_ASYNC_CHECK();
a0d0e21e
LW
3113 RETURNOP(retop);
3114}
3115
3116PP(pp_exit)
3117{
97aff369 3118 dVAR;
39644a26 3119 dSP;
a0d0e21e
LW
3120 I32 anum;
3121
3122 if (MAXARG < 1)
3123 anum = 0;
9d3c658e
FC
3124 else if (!TOPs) {
3125 anum = 0; (void)POPs;
3126 }
ff0cee69 3127 else {
a0d0e21e 3128 anum = SvIVx(POPs);
d98f61e7 3129#ifdef VMS
5450b4d8
FC
3130 if (anum == 1
3131 && SvTRUE(cop_hints_fetch_pvs(PL_curcop, "vmsish_exit", 0)))
ff0cee69 3132 anum = 0;
97124ef6
FC
3133 VMSISH_HUSHED =
3134 VMSISH_HUSHED || (PL_curcop->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
3135#endif
3136 }
cc3604b1 3137 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
3138#ifdef PERL_MAD
3139 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
3140 if (anum || !(PL_minus_c && PL_madskills))
3141 my_exit(anum);
3142#else
a0d0e21e 3143 my_exit(anum);
81d86705 3144#endif
3280af22 3145 PUSHs(&PL_sv_undef);
a0d0e21e
LW
3146 RETURN;
3147}
3148
a0d0e21e
LW
3149/* Eval. */
3150
0824fdcb 3151STATIC void
cea2e8a9 3152S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3153{
504618e9 3154 const char *s = SvPVX_const(sv);
890ce7af 3155 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3156 I32 line = 1;
a0d0e21e 3157
7918f24d
NC
3158 PERL_ARGS_ASSERT_SAVE_LINES;
3159
a0d0e21e 3160 while (s && s < send) {
f54cb97a 3161 const char *t;
b9f83d2f 3162 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3163
1d963ff3 3164 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
3165 if (t)
3166 t++;
3167 else
3168 t = send;
3169
3170 sv_setpvn(tmpstr, s, t - s);
3171 av_store(array, line++, tmpstr);
3172 s = t;
3173 }
3174}
3175
22f16304
RU
3176/*
3177=for apidoc docatch
3178
3179Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3180
31810 is used as continue inside eval,
3182
31833 is used for a die caught by an inner eval - continue inner loop
3184
3185See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
3186establish a local jmpenv to handle exception traps.
3187
3188=cut
3189*/
0824fdcb 3190STATIC OP *
cea2e8a9 3191S_docatch(pTHX_ OP *o)
1e422769 3192{
97aff369 3193 dVAR;
6224f72b 3194 int ret;
06b5626a 3195 OP * const oldop = PL_op;
db36c5a1 3196 dJMPENV;
1e422769 3197
1e422769 3198#ifdef DEBUGGING
54310121 3199 assert(CATCH_GET == TRUE);
1e422769 3200#endif
312caa8e 3201 PL_op = o;
8bffa5f8 3202
14dd3ad8 3203 JMPENV_PUSH(ret);
6224f72b 3204 switch (ret) {
312caa8e 3205 case 0:
abd70938
DM
3206 assert(cxstack_ix >= 0);
3207 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3208 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3209 redo_body:
85aaa934 3210 CALLRUNOPS(aTHX);
312caa8e
CS
3211 break;
3212 case 3:
8bffa5f8 3213 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z
3214 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3215 PL_restartjmpenv = NULL;
312caa8e
CS
3216 PL_op = PL_restartop;
3217 PL_restartop = 0;
3218 goto redo_body;
3219 }
3220 /* FALL THROUGH */
3221 default:
14dd3ad8 3222 JMPENV_POP;
533c011a 3223 PL_op = oldop;
6224f72b 3224 JMPENV_JUMP(ret);
118e2215 3225 assert(0); /* NOTREACHED */
1e422769 3226 }
14dd3ad8 3227 JMPENV_POP;
533c011a 3228 PL_op = oldop;
5f66b61c 3229 return NULL;
1e422769
PP
3230}
3231
a3985cdc
DM
3232
3233/*
3234=for apidoc find_runcv
3235
3236Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
3237If db_seqp is non_null, skip CVs that are in the DB package and populate
3238*db_seqp with the cop sequence number at the point that the DB:: code was
3239entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 3240than in the scope of the debugger itself).
a3985cdc
DM
3241
3242=cut
3243*/
3244
3245CV*
d819b83a 3246Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3247{
db4cf31d 3248 return Perl_find_runcv_where(aTHX_ 0, 0, db_seqp);
70794f7b
FC
3249}
3250
3251/* If this becomes part of the API, it might need a better name. */
3252CV *
db4cf31d 3253Perl_find_runcv_where(pTHX_ U8 cond, IV arg, U32 *db_seqp)
70794f7b 3254{
97aff369 3255 dVAR;
a3985cdc 3256 PERL_SI *si;
b4b0692a 3257 int level = 0;
a3985cdc 3258
d819b83a 3259 if (db_seqp)
c3923c33
DM
3260 *db_seqp =
3261 PL_curcop == &PL_compiling
3262 ? PL_cop_seqmax
3263 : PL_curcop->cop_seq;
3264
a3985cdc 3265 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3266 I32 ix;
a3985cdc 3267 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3268 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
70794f7b 3269 CV *cv = NULL;
d819b83a 3270 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
70794f7b 3271 cv = cx->blk_sub.cv;
d819b83a
DM
3272 /* skip DB:: code */
3273 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3274 *db_seqp = cx->blk_oldcop->cop_seq;
3275 continue;
3276 }
a453e28a
DM
3277 if (cx->cx_type & CXp_SUB_RE)
3278 continue;
d819b83a 3279 }
a3985cdc 3280 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
70794f7b
FC
3281 cv = cx->blk_eval.cv;
3282 if (cv) {
3283 switch (cond) {
db4cf31d
FC
3284 case FIND_RUNCV_padid_eq:
3285 if (!CvPADLIST(cv)
a56015b9 3286 || PadlistNAMES(CvPADLIST(cv)) != INT2PTR(PADNAMELIST *, arg))
8771da69 3287 continue;
b4b0692a
FC
3288 return cv;
3289 case FIND_RUNCV_level_eq:
db4cf31d 3290 if (level++ != arg) continue;
70794f7b
FC
3291 /* GERONIMO! */
3292 default:
3293 return cv;
3294 }
3295 }
a3985cdc
DM
3296 }
3297 }
db4cf31d 3298 return cond == FIND_RUNCV_padid_eq ? NULL : PL_main_cv;
a3985cdc
DM
3299}
3300
3301
27e90453
DM
3302/* Run yyparse() in a setjmp wrapper. Returns:
3303 * 0: yyparse() successful
3304 * 1: yyparse() failed
3305 * 3: yyparse() died
3306 */
3307STATIC int
28ac2b49 3308S_try_yyparse(pTHX_ int gramtype)
27e90453
DM
3309{
3310 int ret;
3311 dJMPENV;
3312
3313 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3314 JMPENV_PUSH(ret);
3315 switch (ret) {
3316 case 0:
28ac2b49 3317 ret = yyparse(gramtype) ? 1 : 0;
27e90453
DM
3318 break;
3319 case 3:
3320 break;
3321 default:
3322 JMPENV_POP;
3323 JMPENV_JUMP(ret);
118e2215 3324 assert(0); /* NOTREACHED */
27e90453
DM
3325 }
3326 JMPENV_POP;
3327 return ret;
3328}
3329
3330
104a8185
DM
3331/* Compile a require/do or an eval ''.
3332 *
a3985cdc 3333 * outside is the lexically enclosing CV (if any) that invoked us.
104a8185
DM
3334 * seq is the current COP scope value.
3335 * hh is the saved hints hash, if any.
3336 *
410be5db 3337 * Returns a bool indicating whether the compile was successful; if so,
104a8185
DM
3338 * PL_eval_start contains the first op of the compiled code; otherwise,
3339 * pushes undef.
3340 *
3341 * This function is called from two places: pp_require and pp_entereval.
3342 * These can be distinguished by whether PL_op is entereval.
7d116edc
FC
3343 */
3344
410be5db 3345STATIC bool
104a8185 3346S_doeval(pTHX_ int gimme, CV* outside, U32 seq, HV *hh)
a0d0e21e 3347{
27da23d5 3348 dVAR; dSP;
46c461b5 3349 OP * const saveop = PL_op;
104a8185 3350 bool clear_hints = saveop->op_type != OP_ENTEREVAL;
f45b078d 3351 COP * const oldcurcop = PL_curcop;
26c9400e 3352 bool in_require = (saveop->op_type == OP_REQUIRE);
27e90453 3353 int yystatus;
676a678a 3354 CV *evalcv;
a0d0e21e 3355
27e90453 3356 PL_in_eval = (in_require
6dc8a9e4 3357 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
a1941760
DM
3358 : (EVAL_INEVAL |
3359 ((PL_op->op_private & OPpEVAL_RE_REPARSING)
3360 ? EVAL_RE_REPARSING : 0)));
a0d0e21e 3361
1ce6579f
PP
3362 PUSHMARK(SP);
3363
676a678a
Z
3364 evalcv = MUTABLE_CV(newSV_type(SVt_PVCV));
3365 CvEVAL_on(evalcv);
2090ab20 3366 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
676a678a 3367 cxstack[cxstack_ix].blk_eval.cv = evalcv;
86a64801 3368 cxstack[cxstack_ix].blk_gimme = gimme;
2090ab20 3369
676a678a
Z
3370 CvOUTSIDE_SEQ(evalcv) = seq;
3371 CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3372
dd2155a4 3373 /* set up a scratch pad */
a0d0e21e 3374
676a678a 3375 CvPADLIST(evalcv) = pad_new(padnew_SAVE);
cecbe010 3376 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3377
07055b4c 3378
81d86705 3379 if (!PL_madskills)
676a678a 3380 SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */
748a9306 3381
a0d0e21e
LW
3382 /* make sure we compile in the right package */
3383
ed094faf 3384 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
03d9f026 3385 SAVEGENERICSV(PL_curstash);
cb1ad50e
FC
3386 PL_curstash = (HV *)CopSTASH(PL_curcop);
3387 if (SvTYPE(PL_curstash) != SVt_PVHV) PL_curstash = NULL;
3388 else SvREFCNT_inc_simple_void(PL_curstash);
a0d0e21e 3389 }
3c10abe3 3390 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
3391 SAVESPTR(PL_beginav);
3392 PL_beginav = newAV();
3393 SAVEFREESV(PL_beginav);
3c10abe3
AG
3394 SAVESPTR(PL_unitcheckav);
3395 PL_unitcheckav = newAV();
3396 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3397
81d86705 3398#ifdef PERL_MAD
9da243ce 3399 SAVEBOOL(PL_madskills);
81d86705
NC
3400 PL_madskills = 0;
3401#endif
3402
104a8185 3403 ENTER_with_name("evalcomp");
676a678a
Z
3404 SAVESPTR(PL_compcv);