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[perl #123737] Fix assertion failure with 0${
[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{
39644a26 43 dSP;
a0d0e21e 44 I32 cxix;
93f0bc49 45 const PERL_CONTEXT *cx;
a0d0e21e
LW		 46 EXTEND(SP, 1);
47
93f0bc49
FC		 48 if (PL_op->op_private & OPpOFFBYONE) {
49 if (!(cx = caller_cx(1,NULL))) RETPUSHUNDEF;
50 }
51 else {
52 cxix = dopoptosub(cxstack_ix);
53 if (cxix < 0)
a0d0e21e 54 RETPUSHUNDEF;
93f0bc49
FC		 55 cx = &cxstack[cxix];
56 }
a0d0e21e 57
93f0bc49 58 switch (cx->blk_gimme) {
54310121 59 case G_ARRAY:
a0d0e21e 60 RETPUSHYES;
54310121 61 case G_SCALAR:
a0d0e21e 62 RETPUSHNO;
54310121 63 default:
64 RETPUSHUNDEF;
65 }
a0d0e21e
LW		 66}
67
2cd61cdb
IZ		 68PP(pp_regcreset)
69{
0b4182de 70 TAINT_NOT;
2cd61cdb
IZ		 71 return NORMAL;
72}
73
b3eb6a9b
GS		 74PP(pp_regcomp)
75{
39644a26 76 dSP;
eb578fdb 77 PMOP *pm = (PMOP*)cLOGOP->op_other;
9f141731 78 SV **args;
df787a7b 79 int nargs;
84679df5 80 REGEXP *re = NULL;
9f141731
DM		 81 REGEXP *new_re;
82 const regexp_engine *eng;
dbc200c5 83 bool is_bare_re= FALSE;
bfed75c6 84
df787a7b
DM		 85 if (PL_op->op_flags & OPf_STACKED) {
86 dMARK;
87 nargs = SP - MARK;
88 args = ++MARK;
89 }
90 else {
91 nargs = 1;
92 args = SP;
93 }
94
4b5a0d1c 95 /* prevent recompiling under /o and ithreads. */
3db8f154 96#if defined(USE_ITHREADS)
131b3ad0 97 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
df787a7b 98 SP = args-1;
131b3ad0
DM		 99 RETURN;
100 }
513629ba 101#endif
d4b87e75 102
9f141731
DM		 103 re = PM_GETRE(pm);
104 assert (re != (REGEXP*) &PL_sv_undef);
105 eng = re ? RX_ENGINE(re) : current_re_engine();
106
dbc200c5
YO		 107 /*
108 In the below logic: these are basically the same - check if this regcomp is part of a split.
109
110 (PL_op->op_pmflags & PMf_split )
111 (PL_op->op_next->op_type == OP_PUSHRE)
112
113 We could add a new mask for this and copy the PMf_split, if we did
114 some bit definition fiddling first.
115
116 For now we leave this
117 */
118
3c13cae6
DM		 119 new_re = (eng->op_comp
120 ? eng->op_comp
121 : &Perl_re_op_compile
122 )(aTHX_ args, nargs, pm->op_code_list, eng, re,
346d3070 123 &is_bare_re,
dbc200c5 124 (pm->op_pmflags & RXf_PMf_FLAGCOPYMASK),
a5ae69f0
DM		 125 pm->op_pmflags |
126 (PL_op->op_flags & OPf_SPECIAL ? PMf_USE_RE_EVAL : 0));
dbc200c5 127
346d3070 128 if (pm->op_pmflags & PMf_HAS_CV)
8d919b0a 129 ReANY(new_re)->qr_anoncv
9fe3265f 130 = (CV*) SvREFCNT_inc(PAD_SV(PL_op->op_targ));
9f141731
DM		 131
132 if (is_bare_re) {
133 REGEXP *tmp;
134 /* The match's LHS's get-magic might need to access this op's regexp
135 (e.g. $' =~ /$re/ while foo; see bug 70764). So we must call
136 get-magic now before we replace the regexp. Hopefully this hack can
137 be replaced with the approach described at
138 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03/msg122415.html
139 some day. */
140 if (pm->op_type == OP_MATCH) {
141 SV *lhs;
284167a5 142 const bool was_tainted = TAINT_get;
9f141731
DM		 143 if (pm->op_flags & OPf_STACKED)
144 lhs = args[-1];
6ffceeb7 145 else if (pm->op_targ)
9f141731
DM		 146 lhs = PAD_SV(pm->op_targ);
147 else lhs = DEFSV;
148 SvGETMAGIC(lhs);
149 /* Restore the previous value of PL_tainted (which may have been
150 modified by get-magic), to avoid incorrectly setting the
284167a5
S		 151 RXf_TAINTED flag with RX_TAINT_on further down. */
152 TAINT_set(was_tainted);
dc6d7f5c 153#ifdef NO_TAINT_SUPPORT
9a9b5ec9
DM		 154 PERL_UNUSED_VAR(was_tainted);
155#endif
df787a7b 156 }
9f141731
DM		 157 tmp = reg_temp_copy(NULL, new_re);
158 ReREFCNT_dec(new_re);
159 new_re = tmp;
df787a7b 160 }
dbc200c5 161
9f141731
DM		 162 if (re != new_re) {
163 ReREFCNT_dec(re);
164 PM_SETRE(pm, new_re);
c277df42 165 }
d4b87e75 166
dbc200c5 167
284167a5 168 if (TAINTING_get && TAINT_get) {
9f141731 169 SvTAINTED_on((SV*)new_re);
284167a5 170 RX_TAINT_on(new_re);
72311751 171 }
72311751 172
c737faaf
YO		 173#if !defined(USE_ITHREADS)
174 /* can't change the optree at runtime either */
175 /* PMf_KEEP is handled differently under threads to avoid these problems */
9f141731
DM		 176 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
177 pm = PL_curpm;
a0d0e21e 178 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 179 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 180 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 181 }
c737faaf 182#endif
9f141731 183
df787a7b 184 SP = args-1;
a0d0e21e
LW		 185 RETURN;
186}
187
9f141731 188
a0d0e21e
LW		 189PP(pp_substcont)
190{
39644a26 191 dSP;
eb578fdb
KW		 192 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
193 PMOP * const pm = (PMOP*) cLOGOP->op_other;
194 SV * const dstr = cx->sb_dstr;
195 char *s = cx->sb_s;
196 char *m = cx->sb_m;
a0d0e21e 197 char *orig = cx->sb_orig;
eb578fdb 198 REGEXP * const rx = cx->sb_rx;
c445ea15 199 SV *nsv = NULL;
988e6e7e 200 REGEXP *old = PM_GETRE(pm);
f410a211
NC		 201
202 PERL_ASYNC_CHECK();
203
988e6e7e 204 if(old != rx) {
bfed75c6 205 if(old)
988e6e7e 206 ReREFCNT_dec(old);
d6106309 207 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB		 208 }
209
d9f97599 210 rxres_restore(&cx->sb_rxres, rx);
c90c0ff4 211
a0d0e21e 212 if (cx->sb_iters++) {
3c6ef0a5 213 const SSize_t saviters = cx->sb_iters;
a0d0e21e 214 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 215 DIE(aTHX_ "Substitution loop");
a0d0e21e 216
447ee134
DM		 217 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
218
ef07e810 219 /* See "how taint works" above pp_subst() */
20be6587
DM		 220 if (SvTAINTED(TOPs))
221 cx->sb_rxtainted |= SUBST_TAINT_REPL;
447ee134 222 sv_catsv_nomg(dstr, POPs);
2c296965 223 if (CxONCE(cx) || s < orig ||
03c83e26
DM		 224 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
225 (s == m), cx->sb_targ, NULL,
d5e7783a 226 (REXEC_IGNOREPOS|REXEC_NOT_FIRST|REXEC_FAIL_ON_UNDERFLOW)))
a0d0e21e 227 {
8ca8a454 228 SV *targ = cx->sb_targ;
748a9306 229
078c425b
JH		 230 assert(cx->sb_strend >= s);
231 if(cx->sb_strend > s) {
232 if (DO_UTF8(dstr) && !SvUTF8(targ))
4bac9ae4 233 sv_catpvn_nomg_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
078c425b 234 else
4bac9ae4 235 sv_catpvn_nomg(dstr, s, cx->sb_strend - s);
078c425b 236 }
20be6587
DM		 237 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
238 cx->sb_rxtainted |= SUBST_TAINT_PAT;
9212bbba 239
8ca8a454
NC		 240 if (pm->op_pmflags & PMf_NONDESTRUCT) {
241 PUSHs(dstr);
242 /* From here on down we're using the copy, and leaving the
243 original untouched. */
244 targ = dstr;
245 }
246 else {
9e0ea7f3
FC		 247 SV_CHECK_THINKFIRST_COW_DROP(targ);
248 if (isGV(targ)) Perl_croak_no_modify();
249 SvPV_free(targ);
8ca8a454
NC		 250 SvPV_set(targ, SvPVX(dstr));
251 SvCUR_set(targ, SvCUR(dstr));
252 SvLEN_set(targ, SvLEN(dstr));
253 if (DO_UTF8(dstr))
254 SvUTF8_on(targ);
255 SvPV_set(dstr, NULL);
256
52c47e16 257 PL_tainted = 0;
4f4d7508 258 mPUSHi(saviters - 1);
48c036b1 259
8ca8a454
NC		 260 (void)SvPOK_only_UTF8(targ);
261 }
5cd24f17 262
20be6587 263 /* update the taint state of various various variables in
ef07e810
DM		 264 * preparation for final exit.
265 * See "how taint works" above pp_subst() */
284167a5 266 if (TAINTING_get) {
20be6587
DM		 267 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
268 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
269 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
270 )
271 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
272
273 if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
274 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
275 )
276 SvTAINTED_on(TOPs); /* taint return value */
277 /* needed for mg_set below */
284167a5
S		 278 TAINT_set(
279 cBOOL(cx->sb_rxtainted &
280 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL))
281 );
20be6587
DM		 282 SvTAINT(TARG);
283 }
284 /* PL_tainted must be correctly set for this mg_set */
285 SvSETMAGIC(TARG);
286 TAINT_NOT;
4633a7c4 287 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e 288 POPSUBST(cx);
47c9d59f 289 PERL_ASYNC_CHECK();
a0d0e21e 290 RETURNOP(pm->op_next);
e5964223 291 NOT_REACHED; /* NOTREACHED */
a0d0e21e 292 }
8e5e9ebe 293 cx->sb_iters = saviters;
a0d0e21e 294 }
07bc277f 295 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW		 296 m = s;
297 s = orig;
6502e081 298 assert(!RX_SUBOFFSET(rx));
07bc277f 299 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW		 300 s = orig + (m - s);
301 cx->sb_strend = s + (cx->sb_strend - m);
302 }
07bc277f 303 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 304 if (m > s) {
bfed75c6 305 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
4bac9ae4 306 sv_catpvn_nomg_utf8_upgrade(dstr, s, m - s, nsv);
db79b45b 307 else
4bac9ae4 308 sv_catpvn_nomg(dstr, s, m-s);
db79b45b 309 }
07bc277f 310 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 311 { /* Update the pos() information. */
8ca8a454
NC		 312 SV * const sv
313 = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
084916e3 314 MAGIC *mg;
96c2a8ff
FC		 315 if (!(mg = mg_find_mglob(sv))) {
316 mg = sv_magicext_mglob(sv);
084916e3 317 }
cda67c99
DM		 318 assert(SvPOK(sv));
319 MgBYTEPOS_set(mg, sv, SvPVX(sv), m - orig);
084916e3 320 }
988e6e7e 321 if (old != rx)
d6106309 322 (void)ReREFCNT_inc(rx);
20be6587 323 /* update the taint state of various various variables in preparation
ef07e810
DM		 324 * for calling the code block.
325 * See "how taint works" above pp_subst() */
284167a5 326 if (TAINTING_get) {
20be6587
DM		 327 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
328 cx->sb_rxtainted |= SUBST_TAINT_PAT;
329
330 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
331 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
332 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
333 )
334 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
335
336 if (cx->sb_iters > 1 && (cx->sb_rxtainted &
337 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
8ca8a454
NC		 338 SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
339 ? cx->sb_dstr : cx->sb_targ);
20be6587
DM		 340 TAINT_NOT;
341 }
d9f97599 342 rxres_save(&cx->sb_rxres, rx);
af9838cc 343 PL_curpm = pm;
29f2e912 344 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW		 345}
346
c90c0ff4 347void
864dbfa3 348Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 349{
350 UV *p = (UV*)*rsp;
351 U32 i;
7918f24d
NC		 352
353 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 354 PERL_UNUSED_CONTEXT;
c90c0ff4 355
07bc277f 356 if (!p || p[1] < RX_NPARENS(rx)) {
db2c6cb3 357#ifdef PERL_ANY_COW
6502e081 358 i = 7 + (RX_NPARENS(rx)+1) * 2;
ed252734 359#else
6502e081 360 i = 6 + (RX_NPARENS(rx)+1) * 2;
ed252734 361#endif
c90c0ff4 362 if (!p)
a02a5408 363 Newx(p, i, UV);
c90c0ff4 364 else
365 Renew(p, i, UV);
366 *rsp = (void*)p;
367 }
368
5eabab15
DM		 369 /* what (if anything) to free on croak */
370 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 371 RX_MATCH_COPIED_off(rx);
6c31ff74 372 *p++ = RX_NPARENS(rx);
c90c0ff4 373
db2c6cb3 374#ifdef PERL_ANY_COW
bdd9a1b1
NC		 375 *p++ = PTR2UV(RX_SAVED_COPY(rx));
376 RX_SAVED_COPY(rx) = NULL;
ed252734
NC		 377#endif
378
07bc277f
NC		 379 *p++ = PTR2UV(RX_SUBBEG(rx));
380 *p++ = (UV)RX_SUBLEN(rx);
6502e081
DM		 381 *p++ = (UV)RX_SUBOFFSET(rx);
382 *p++ = (UV)RX_SUBCOFFSET(rx);
07bc277f
NC		 383 for (i = 0; i <= RX_NPARENS(rx); ++i) {
384 *p++ = (UV)RX_OFFS(rx)[i].start;
385 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4 386 }
387}
388
9c105995
NC		 389static void
390S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 391{
392 UV *p = (UV*)*rsp;
393 U32 i;
7918f24d
NC		 394
395 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 396 PERL_UNUSED_CONTEXT;
c90c0ff4 397
ed252734 398 RX_MATCH_COPY_FREE(rx);
cf93c79d 399 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4 400 *p++ = 0;
6c31ff74 401 RX_NPARENS(rx) = *p++;
c90c0ff4 402
db2c6cb3 403#ifdef PERL_ANY_COW
bdd9a1b1
NC		 404 if (RX_SAVED_COPY(rx))
405 SvREFCNT_dec (RX_SAVED_COPY(rx));
406 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC		 407 *p++ = 0;
408#endif
409
07bc277f
NC		 410 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
411 RX_SUBLEN(rx) = (I32)(*p++);
6502e081
DM		 412 RX_SUBOFFSET(rx) = (I32)*p++;
413 RX_SUBCOFFSET(rx) = (I32)*p++;
07bc277f
NC		 414 for (i = 0; i <= RX_NPARENS(rx); ++i) {
415 RX_OFFS(rx)[i].start = (I32)(*p++);
416 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4 417 }
418}
419
9c105995
NC		 420static void
421S_rxres_free(pTHX_ void **rsp)
c90c0ff4 422{
44f8325f 423 UV * const p = (UV*)*rsp;
7918f24d
NC		 424
425 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 426 PERL_UNUSED_CONTEXT;
c90c0ff4 427
428 if (p) {
94010e71 429 void *tmp = INT2PTR(char*,*p);
6c31ff74 430#ifdef PERL_POISON
db2c6cb3 431#ifdef PERL_ANY_COW
6c31ff74 432 U32 i = 9 + p[1] * 2;
94010e71 433#else
6c31ff74 434 U32 i = 8 + p[1] * 2;
94010e71 435#endif
6c31ff74
NC		 436#endif
437
db2c6cb3 438#ifdef PERL_ANY_COW
6c31ff74 439 SvREFCNT_dec (INT2PTR(SV*,p[2]));
ed252734 440#endif
6c31ff74
NC		 441#ifdef PERL_POISON
442 PoisonFree(p, i, sizeof(UV));
443#endif
444
445 Safefree(tmp);
c90c0ff4 446 Safefree(p);
4608196e 447 *rsp = NULL;
c90c0ff4 448 }
449}
450
a701009a
DM		 451#define FORM_NUM_BLANK (1<<30)
452#define FORM_NUM_POINT (1<<29)
453
a0d0e21e
LW		 454PP(pp_formline)
455{
20b7effb 456 dSP; dMARK; dORIGMARK;
eb578fdb 457 SV * const tmpForm = *++MARK;
086b26f3 458 SV *formsv; /* contains text of original format */
eb578fdb
KW		 459 U32 *fpc; /* format ops program counter */
460 char *t; /* current append position in target string */
086b26f3 461 const char *f; /* current position in format string */
eb578fdb
KW		 462 I32 arg;
463 SV *sv = NULL; /* current item */
086b26f3 464 const char *item = NULL;/* string value of current item */
9b4bdfd4
DM		 465 I32 itemsize = 0; /* length (chars) of item, possibly truncated */
466 I32 itembytes = 0; /* as itemsize, but length in bytes */
086b26f3
DM		 467 I32 fieldsize = 0; /* width of current field */
468 I32 lines = 0; /* number of lines that have been output */
469 bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
470 const char *chophere = NULL; /* where to chop current item */
f5ada144 471 STRLEN linemark = 0; /* pos of start of line in output */
65202027 472 NV value;
086b26f3 473 bool gotsome = FALSE; /* seen at least one non-blank item on this line */
9b4bdfd4 474 STRLEN len; /* length of current sv */
26e935cf 475 STRLEN linemax; /* estimate of output size in bytes */
1bd51a4c
IH		 476 bool item_is_utf8 = FALSE;
477 bool targ_is_utf8 = FALSE;
bd7084a6 478 const char *fmt;
74e0ddf7 479 MAGIC *mg = NULL;
4ff700b9
DM		 480 U8 *source; /* source of bytes to append */
481 STRLEN to_copy; /* how may bytes to append */
ea60cfe8 482 char trans; /* what chars to translate */
74e0ddf7 483
3808a683 484 mg = doparseform(tmpForm);
a0d0e21e 485
74e0ddf7 486 fpc = (U32*)mg->mg_ptr;
3808a683
DM		 487 /* the actual string the format was compiled from.
488 * with overload etc, this may not match tmpForm */
489 formsv = mg->mg_obj;
490
74e0ddf7 491
3280af22 492 SvPV_force(PL_formtarget, len);
3808a683 493 if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
125b9982 494 SvTAINTED_on(PL_formtarget);
1bd51a4c
IH		 495 if (DO_UTF8(PL_formtarget))
496 targ_is_utf8 = TRUE;
26e935cf
DM		 497 linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
498 t = SvGROW(PL_formtarget, len + linemax + 1);
499 /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
a0d0e21e 500 t += len;
3808a683 501 f = SvPV_const(formsv, len);
a0d0e21e
LW		 502
503 for (;;) {
504 DEBUG_f( {
bfed75c6 505 const char *name = "???";
a0d0e21e
LW		 506 arg = -1;
507 switch (*fpc) {
508 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
509 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
510 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
511 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
512 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
513
514 case FF_CHECKNL: name = "CHECKNL"; break;
515 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
516 case FF_SPACE: name = "SPACE"; break;
517 case FF_HALFSPACE: name = "HALFSPACE"; break;
518 case FF_ITEM: name = "ITEM"; break;
519 case FF_CHOP: name = "CHOP"; break;
520 case FF_LINEGLOB: name = "LINEGLOB"; break;
521 case FF_NEWLINE: name = "NEWLINE"; break;
522 case FF_MORE: name = "MORE"; break;
523 case FF_LINEMARK: name = "LINEMARK"; break;
524 case FF_END: name = "END"; break;
bfed75c6 525 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 526 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW		 527 }
528 if (arg >= 0)
bf49b057 529 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 530 else
bf49b057 531 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 532 } );
a0d0e21e 533 switch (*fpc++) {
4a73dc0b 534 case FF_LINEMARK: /* start (or end) of a line */
f5ada144 535 linemark = t - SvPVX(PL_formtarget);
a0d0e21e
LW		 536 lines++;
537 gotsome = FALSE;
538 break;
539
4a73dc0b 540 case FF_LITERAL: /* append <arg> literal chars */
ea60cfe8
DM		 541 to_copy = *fpc++;
542 source = (U8 *)f;
543 f += to_copy;
544 trans = '~';
75645721 545 item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
ea60cfe8 546 goto append;
a0d0e21e 547
4a73dc0b 548 case FF_SKIP: /* skip <arg> chars in format */
a0d0e21e
LW		 549 f += *fpc++;
550 break;
551
4a73dc0b 552 case FF_FETCH: /* get next item and set field size to <arg> */
a0d0e21e
LW		 553 arg = *fpc++;
554 f += arg;
555 fieldsize = arg;
556
557 if (MARK < SP)
558 sv = *++MARK;
559 else {
3280af22 560 sv = &PL_sv_no;
a2a5de95 561 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e 562 }
125b9982
NT		 563 if (SvTAINTED(sv))
564 SvTAINTED_on(PL_formtarget);
a0d0e21e
LW		 565 break;
566
4a73dc0b 567 case FF_CHECKNL: /* find max len of item (up to \n) that fits field */
5a34cab7 568 {
5a34cab7 569 const char *s = item = SvPV_const(sv, len);
9b4bdfd4
DM		 570 const char *send = s + len;
571
572 itemsize = 0;
573 item_is_utf8 = DO_UTF8(sv);
574 while (s < send) {
575 if (!isCNTRL(*s))
576 gotsome = TRUE;
577 else if (*s == '\n')
578 break;
579
580 if (item_is_utf8)
581 s += UTF8SKIP(s);
582 else
583 s++;
584 itemsize++;
585 if (itemsize == fieldsize)
586 break;
587 }
588 itembytes = s - item;
62db6ea5 589 chophere = s;
5a34cab7 590 break;
a0ed51b3 591 }
a0d0e21e 592
4a73dc0b 593 case FF_CHECKCHOP: /* like CHECKNL, but up to highest split point */
5a34cab7
NC		 594 {
595 const char *s = item = SvPV_const(sv, len);
9b4bdfd4
DM		 596 const char *send = s + len;
597 I32 size = 0;
598
599 chophere = NULL;
600 item_is_utf8 = DO_UTF8(sv);
601 while (s < send) {
602 /* look for a legal split position */
603 if (isSPACE(*s)) {
604 if (*s == '\r') {
605 chophere = s;
606 itemsize = size;
607 break;
608 }
609 if (chopspace) {
610 /* provisional split point */
611 chophere = s;
612 itemsize = size;
613 }
614 /* we delay testing fieldsize until after we've
615 * processed the possible split char directly
616 * following the last field char; so if fieldsize=3
617 * and item="a b cdef", we consume "a b", not "a".
618 * Ditto further down.
619 */
620 if (size == fieldsize)
621 break;
622 }
623 else {
624 if (strchr(PL_chopset, *s)) {
625 /* provisional split point */
626 /* for a non-space split char, we include
627 * the split char; hence the '+1' */
628 chophere = s + 1;
629 itemsize = size;
630 }
631 if (size == fieldsize)
632 break;
633 if (!isCNTRL(*s))
634 gotsome = TRUE;
635 }
636
637 if (item_is_utf8)
638 s += UTF8SKIP(s);
639 else
077dbbf3 640 s++;
9b4bdfd4
DM		 641 size++;
642 }
643 if (!chophere || s == send) {
644 chophere = s;
645 itemsize = size;
646 }
647 itembytes = chophere - item;
648
5a34cab7 649 break;
a0d0e21e 650 }
a0d0e21e 651
4a73dc0b 652 case FF_SPACE: /* append padding space (diff of field, item size) */
a0d0e21e
LW		 653 arg = fieldsize - itemsize;
654 if (arg) {
655 fieldsize -= arg;
656 while (arg-- > 0)
657 *t++ = ' ';
658 }
659 break;
660
4a73dc0b 661 case FF_HALFSPACE: /* like FF_SPACE, but only append half as many */
a0d0e21e
LW		 662 arg = fieldsize - itemsize;
663 if (arg) {
664 arg /= 2;
665 fieldsize -= arg;
666 while (arg-- > 0)
667 *t++ = ' ';
668 }
669 break;
670
4a73dc0b 671 case FF_ITEM: /* append a text item, while blanking ctrl chars */
9b4bdfd4 672 to_copy = itembytes;
8aa7beb6
DM		 673 source = (U8 *)item;
674 trans = 1;
8aa7beb6 675 goto append;
a0d0e21e 676
4a73dc0b 677 case FF_CHOP: /* (for ^*) chop the current item */
fb9282c3 678 if (sv != &PL_sv_no) {
5a34cab7
NC		 679 const char *s = chophere;
680 if (chopspace) {
af68e756 681 while (isSPACE(*s))
5a34cab7
NC		 682 s++;
683 }
9b4bdfd4
DM		 684 if (SvPOKp(sv))
685 sv_chop(sv,s);
686 else
687 /* tied, overloaded or similar strangeness.
688 * Do it the hard way */
689 sv_setpvn(sv, s, len - (s-item));
5a34cab7
NC		 690 SvSETMAGIC(sv);
691 break;
a0d0e21e 692 }
a0d0e21e 693
4a73dc0b 694 case FF_LINESNGL: /* process ^* */
a1b95068 695 chopspace = 0;
c67159e1 696 /* FALLTHROUGH */
4a73dc0b
DM		 697
698 case FF_LINEGLOB: /* process @* */
5a34cab7 699 {
e32383e2 700 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 701 const char *s = item = SvPV_const(sv, len);
7440a75b 702 const char *const send = s + len;
7440a75b 703
f3f2f1a3 704 item_is_utf8 = DO_UTF8(sv);
fb9282c3 705 chophere = s + len;
a1137ee5 706 if (!len)
7440a75b 707 break;
ea60cfe8 708 trans = 0;
0d21cefe 709 gotsome = TRUE;
4ff700b9
DM		 710 source = (U8 *) s;
711 to_copy = len;
0d21cefe
DM		 712 while (s < send) {
713 if (*s++ == '\n') {
714 if (oneline) {
9b4bdfd4 715 to_copy = s - item - 1;
0d21cefe
DM		 716 chophere = s;
717 break;
718 } else {
719 if (s == send) {
0d21cefe
DM		 720 to_copy--;
721 } else
722 lines++;
1bd51a4c 723 }
a0d0e21e 724 }
0d21cefe 725 }
a2c0032b
DM		 726 }
727
ea60cfe8
DM		 728 append:
729 /* append to_copy bytes from source to PL_formstring.
730 * item_is_utf8 implies source is utf8.
731 * if trans, translate certain characters during the copy */
a2c0032b
DM		 732 {
733 U8 *tmp = NULL;
26e935cf 734 STRLEN grow = 0;
0325ce87
DM		 735
736 SvCUR_set(PL_formtarget,
737 t - SvPVX_const(PL_formtarget));
738
0d21cefe
DM		 739 if (targ_is_utf8 && !item_is_utf8) {
740 source = tmp = bytes_to_utf8(source, &to_copy);
0d21cefe
DM		 741 } else {
742 if (item_is_utf8 && !targ_is_utf8) {
f5ada144 743 U8 *s;
0d21cefe 744 /* Upgrade targ to UTF8, and then we reduce it to
0325ce87
DM		 745 a problem we have a simple solution for.
746 Don't need get magic. */
0d21cefe 747 sv_utf8_upgrade_nomg(PL_formtarget);
0325ce87 748 targ_is_utf8 = TRUE;
f5ada144
DM		 749 /* re-calculate linemark */
750 s = (U8*)SvPVX(PL_formtarget);
26e935cf
DM		 751 /* the bytes we initially allocated to append the
752 * whole line may have been gobbled up during the
753 * upgrade, so allocate a whole new line's worth
754 * for safety */
755 grow = linemax;
f5ada144
DM		 756 while (linemark--)
757 s += UTF8SKIP(s);
758 linemark = s - (U8*)SvPVX(PL_formtarget);
e8e72d41 759 }
0d21cefe
DM		 760 /* Easy. They agree. */
761 assert (item_is_utf8 == targ_is_utf8);
762 }
26e935cf
DM		 763 if (!trans)
764 /* @* and ^* are the only things that can exceed
765 * the linemax, so grow by the output size, plus
766 * a whole new form's worth in case of any further
767 * output */
768 grow = linemax + to_copy;
769 if (grow)
770 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
0d21cefe
DM		 771 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
772
773 Copy(source, t, to_copy, char);
ea60cfe8 774 if (trans) {
8aa7beb6
DM		 775 /* blank out ~ or control chars, depending on trans.
776 * works on bytes not chars, so relies on not
777 * matching utf8 continuation bytes */
ea60cfe8
DM		 778 U8 *s = (U8*)t;
779 U8 *send = s + to_copy;
780 while (s < send) {
8aa7beb6 781 const int ch = *s;
077dbbf3 782 if (trans == '~' ? (ch == '~') : isCNTRL(ch))
ea60cfe8
DM		 783 *s = ' ';
784 s++;
785 }
786 }
787
0d21cefe
DM		 788 t += to_copy;
789 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
a1137ee5 790 if (tmp)
0d21cefe 791 Safefree(tmp);
5a34cab7 792 break;
a0d0e21e 793 }
a0d0e21e 794
4a73dc0b 795 case FF_0DECIMAL: /* like FF_DECIMAL but for 0### */
a0d0e21e 796 arg = *fpc++;
bd7084a6 797 fmt = (const char *)
a029fa42 798 ((arg & FORM_NUM_POINT) ? "%#0*.*" NVff : "%0*.*" NVff);
bd7084a6 799 goto ff_dec;
5d37acd6 800
bd7084a6
DM		 801 case FF_DECIMAL: /* do @##, ^##, where <arg>=(precision|flags) */
802 arg = *fpc++;
bd7084a6 803 fmt = (const char *)
a029fa42 804 ((arg & FORM_NUM_POINT) ? "%#*.*" NVff : "%*.*" NVff);
bd7084a6 805 ff_dec:
784707d5
JP		 806 /* If the field is marked with ^ and the value is undefined,
807 blank it out. */
a701009a 808 if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
784707d5
JP		 809 arg = fieldsize;
810 while (arg--)
811 *t++ = ' ';
812 break;
813 }
814 gotsome = TRUE;
815 value = SvNV(sv);
a1b95068 816 /* overflow evidence */
bfed75c6 817 if (num_overflow(value, fieldsize, arg)) {
a1b95068
WL		 818 arg = fieldsize;
819 while (arg--)
820 *t++ = '#';
821 break;
822 }
784707d5
JP		 823 /* Formats aren't yet marked for locales, so assume "yes". */
824 {
e8549682
JH		 825 Size_t max = SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget));
826 int len;
a2287a13 827 DECLARE_STORE_LC_NUMERIC_SET_TO_NEEDED();
51f14a05 828 arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
a4eca1d4
JH		 829#ifdef USE_QUADMATH
830 {
831 const char* qfmt = quadmath_format_single(fmt);
832 int len;
833 if (!qfmt)
834 Perl_croak_nocontext("panic: quadmath invalid format \"%s\"", fmt);
835 len = quadmath_snprintf(t, max, qfmt, (int) fieldsize, (int) arg, value);
836 if (len == -1)
837 Perl_croak_nocontext("panic: quadmath_snprintf failed, format \"%s\"", qfmt);
838 if (qfmt != fmt)
839 Safefree(fmt);
840 }
841#else
b587c0e8
DM		 842 /* we generate fmt ourselves so it is safe */
843 GCC_DIAG_IGNORE(-Wformat-nonliteral);
e8549682 844 len = my_snprintf(t, max, fmt, (int) fieldsize, (int) arg, value);
b587c0e8 845 GCC_DIAG_RESTORE;
a4eca1d4
JH		 846#endif
847 PERL_MY_SNPRINTF_POST_GUARD(len, max);
a2287a13 848 RESTORE_LC_NUMERIC();
784707d5
JP		 849 }
850 t += fieldsize;
851 break;
a1b95068 852
4a73dc0b 853 case FF_NEWLINE: /* delete trailing spaces, then append \n */
a0d0e21e 854 f++;
f5ada144 855 while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
a0d0e21e
LW		 856 t++;
857 *t++ = '\n';
858 break;
859
4a73dc0b 860 case FF_BLANK: /* for arg==0: do '~'; for arg>0 : do '~~' */
a0d0e21e
LW		 861 arg = *fpc++;
862 if (gotsome) {
863 if (arg) { /* repeat until fields exhausted? */
11f9eeaf
DM		 864 fpc--;
865 goto end;
a0d0e21e
LW		 866 }
867 }
868 else {
f5ada144 869 t = SvPVX(PL_formtarget) + linemark;
a0d0e21e
LW		 870 lines--;
871 }
872 break;
873
4a73dc0b 874 case FF_MORE: /* replace long end of string with '...' */
5a34cab7
NC		 875 {
876 const char *s = chophere;
877 const char *send = item + len;
878 if (chopspace) {
af68e756 879 while (isSPACE(*s) && (s < send))
5a34cab7 880 s++;
a0d0e21e 881 }
5a34cab7
NC		 882 if (s < send) {
883 char *s1;
884 arg = fieldsize - itemsize;
885 if (arg) {
886 fieldsize -= arg;
887 while (arg-- > 0)
888 *t++ = ' ';
889 }
890 s1 = t - 3;
891 if (strnEQ(s1," ",3)) {
892 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
893 s1--;
894 }
895 *s1++ = '.';
896 *s1++ = '.';
897 *s1++ = '.';
a0d0e21e 898 }
5a34cab7 899 break;
a0d0e21e 900 }
4a73dc0b
DM		 901
902 case FF_END: /* tidy up, then return */
11f9eeaf 903 end:
bf2bec63 904 assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
a0d0e21e 905 *t = '\0';
b15aece3 906 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH		 907 if (targ_is_utf8)
908 SvUTF8_on(PL_formtarget);
3280af22 909 FmLINES(PL_formtarget) += lines;
a0d0e21e 910 SP = ORIGMARK;
11f9eeaf
DM		 911 if (fpc[-1] == FF_BLANK)
912 RETURNOP(cLISTOP->op_first);
913 else
914 RETPUSHYES;
a0d0e21e
LW		 915 }
916 }
917}
918
919PP(pp_grepstart)
920{
20b7effb 921 dSP;
a0d0e21e
LW		 922 SV *src;
923
3280af22 924 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 925 (void)POPMARK;
54310121 926 if (GIMME_V == G_SCALAR)
6e449a3a 927 mXPUSHi(0);
533c011a 928 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 929 }
3280af22 930 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
897d3989
NC		 931 Perl_pp_pushmark(aTHX); /* push dst */
932 Perl_pp_pushmark(aTHX); /* push src */
d343c3ef 933 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW		 934
935 SAVETMPS;
59f00321
RGS		 936 if (PL_op->op_private & OPpGREP_LEX)
937 SAVESPTR(PAD_SVl(PL_op->op_targ));
938 else
939 SAVE_DEFSV;
d343c3ef 940 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 941 SAVEVPTR(PL_curpm);
a0d0e21e 942
3280af22 943 src = PL_stack_base[*PL_markstack_ptr];
60779a30 944 if (SvPADTMP(src)) {
a0ed822e
FC		 945 src = PL_stack_base[*PL_markstack_ptr] = sv_mortalcopy(src);
946 PL_tmps_floor++;
947 }
a0d0e21e 948 SvTEMP_off(src);
59f00321
RGS		 949 if (PL_op->op_private & OPpGREP_LEX)
950 PAD_SVl(PL_op->op_targ) = src;
951 else
414bf5ae 952 DEFSV_set(src);
a0d0e21e
LW		 953
954 PUTBACK;
533c011a 955 if (PL_op->op_type == OP_MAPSTART)
897d3989 956 Perl_pp_pushmark(aTHX); /* push top */
533c011a 957 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW		 958}
959
a0d0e21e
LW		 960PP(pp_mapwhile)
961{
20b7effb 962 dSP;
f54cb97a 963 const I32 gimme = GIMME_V;
544f3153 964 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW		 965 I32 count;
966 I32 shift;
967 SV** src;
ac27b0f5 968 SV** dst;
a0d0e21e 969
544f3153 970 /* first, move source pointer to the next item in the source list */
3280af22 971 ++PL_markstack_ptr[-1];
544f3153
GS		 972
973 /* if there are new items, push them into the destination list */
4c90a460 974 if (items && gimme != G_VOID) {
544f3153
GS		 975 /* might need to make room back there first */
976 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
977 /* XXX this implementation is very pessimal because the stack
978 * is repeatedly extended for every set of items. Is possible
979 * to do this without any stack extension or copying at all
980 * by maintaining a separate list over which the map iterates
18ef8bea 981 * (like foreach does). --gsar */
544f3153
GS		 982
983 /* everything in the stack after the destination list moves
984 * towards the end the stack by the amount of room needed */
985 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
986
987 /* items to shift up (accounting for the moved source pointer) */
988 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT		 989
990 /* This optimization is by Ben Tilly and it does
991 * things differently from what Sarathy (gsar)
992 * is describing. The downside of this optimization is
993 * that leaves "holes" (uninitialized and hopefully unused areas)
994 * to the Perl stack, but on the other hand this
995 * shouldn't be a problem. If Sarathy's idea gets
996 * implemented, this optimization should become
997 * irrelevant. --jhi */
998 if (shift < count)
999 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1000
924508f0
GS		 1001 EXTEND(SP,shift);
1002 src = SP;
1003 dst = (SP += shift);
3280af22
NIS		 1004 PL_markstack_ptr[-1] += shift;
1005 *PL_markstack_ptr += shift;
544f3153 1006 while (count--)
a0d0e21e
LW		 1007 *dst-- = *src--;
1008 }
544f3153 1009 /* copy the new items down to the destination list */
ac27b0f5 1010 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26 1011 if (gimme == G_ARRAY) {
b2a2a901
DM		 1012 /* add returned items to the collection (making mortal copies
1013 * if necessary), then clear the current temps stack frame
1014 * *except* for those items. We do this splicing the items
1015 * into the start of the tmps frame (so some items may be on
59d53fd6 1016 * the tmps stack twice), then moving PL_tmps_floor above
b2a2a901
DM		 1017 * them, then freeing the frame. That way, the only tmps that
1018 * accumulate over iterations are the return values for map.
1019 * We have to do to this way so that everything gets correctly
1020 * freed if we die during the map.
1021 */
1022 I32 tmpsbase;
1023 I32 i = items;
1024 /* make space for the slice */
1025 EXTEND_MORTAL(items);
1026 tmpsbase = PL_tmps_floor + 1;
1027 Move(PL_tmps_stack + tmpsbase,
1028 PL_tmps_stack + tmpsbase + items,
1029 PL_tmps_ix - PL_tmps_floor,
1030 SV*);
1031 PL_tmps_ix += items;
1032
1033 while (i-- > 0) {
1034 SV *sv = POPs;
1035 if (!SvTEMP(sv))
1036 sv = sv_mortalcopy(sv);
1037 *dst-- = sv;
1038 PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
1039 }
1040 /* clear the stack frame except for the items */
1041 PL_tmps_floor += items;
1042 FREETMPS;
1043 /* FREETMPS may have cleared the TEMP flag on some of the items */
1044 i = items;
1045 while (i-- > 0)
1046 SvTEMP_on(PL_tmps_stack[--tmpsbase]);
22023b26 1047 }
bfed75c6 1048 else {
22023b26
TP		 1049 /* scalar context: we don't care about which values map returns
1050 * (we use undef here). And so we certainly don't want to do mortal
1051 * copies of meaningless values. */
1052 while (items-- > 0) {
b988aa42 1053 (void)POPs;
22023b26
TP		 1054 *dst-- = &PL_sv_undef;
1055 }
b2a2a901 1056 FREETMPS;
22023b26 1057 }
a0d0e21e 1058 }
b2a2a901
DM		 1059 else {
1060 FREETMPS;
1061 }
d343c3ef 1062 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW		 1063
1064 /* All done yet? */
3280af22 1065 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW		 1066
1067 (void)POPMARK; /* pop top */
d343c3ef 1068 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1069 (void)POPMARK; /* pop src */
3280af22 1070 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1071 (void)POPMARK; /* pop dst */
3280af22 1072 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1073 if (gimme == G_SCALAR) {
7cc47870
RGS		 1074 if (PL_op->op_private & OPpGREP_LEX) {
1075 SV* sv = sv_newmortal();
1076 sv_setiv(sv, items);
1077 PUSHs(sv);
1078 }
1079 else {
1080 dTARGET;
1081 XPUSHi(items);
1082 }
a0d0e21e 1083 }
54310121 1084 else if (gimme == G_ARRAY)
1085 SP += items;
a0d0e21e
LW		 1086 RETURN;
1087 }
1088 else {
1089 SV *src;
1090
d343c3ef 1091 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1092 SAVEVPTR(PL_curpm);
a0d0e21e 1093
544f3153 1094 /* set $_ to the new source item */
3280af22 1095 src = PL_stack_base[PL_markstack_ptr[-1]];
60779a30 1096 if (SvPADTMP(src)) {
60779a30
DM		 1097 src = sv_mortalcopy(src);
1098 }
a0d0e21e 1099 SvTEMP_off(src);
59f00321
RGS		 1100 if (PL_op->op_private & OPpGREP_LEX)
1101 PAD_SVl(PL_op->op_targ) = src;
1102 else
414bf5ae 1103 DEFSV_set(src);
a0d0e21e
LW		 1104
1105 RETURNOP(cLOGOP->op_other);
1106 }
1107}
1108
a0d0e21e
LW		 1109/* Range stuff. */
1110
1111PP(pp_range)
1112{
82334630 1113 if (GIMME_V == G_ARRAY)
1a67a97c 1114 return NORMAL;
538573f7 1115 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1116 return cLOGOP->op_other;
538573f7 1117 else
1a67a97c 1118 return NORMAL;
a0d0e21e
LW		 1119}
1120
1121PP(pp_flip)
1122{
39644a26 1123 dSP;
a0d0e21e 1124
82334630 1125 if (GIMME_V == G_ARRAY) {
1a67a97c 1126 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1127 }
1128 else {
1129 dTOPss;
44f8325f 1130 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1131 int flip = 0;
790090df 1132
bfed75c6 1133 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST		 1134 if (GvIO(PL_last_in_gv)) {
1135 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1136 }
1137 else {
fafc274c 1138 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL		 1139 if (gv && GvSV(gv))
1140 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1141 }
bfed75c6
AL		 1142 } else {
1143 flip = SvTRUE(sv);
1144 }
1145 if (flip) {
a0d0e21e 1146 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1147 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1148 sv_setiv(targ, 1);
3e3baf6d 1149 SETs(targ);
a0d0e21e
LW		 1150 RETURN;
1151 }
1152 else {
1153 sv_setiv(targ, 0);
924508f0 1154 SP--;
1a67a97c 1155 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1156 }
1157 }
76f68e9b 1158 sv_setpvs(TARG, "");
a0d0e21e
LW		 1159 SETs(targ);
1160 RETURN;
1161 }
1162}
1163
8e9bbdb9
RGS		 1164/* This code tries to decide if "$left .. $right" should use the
1165 magical string increment, or if the range is numeric (we make
1166 an exception for .."0" [#18165]). AMS 20021031. */
1167
1168#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS		 1169 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1170 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1171 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1172 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1173 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1174
a0d0e21e
LW		 1175PP(pp_flop)
1176{
20b7effb 1177 dSP;
a0d0e21e 1178
82334630 1179 if (GIMME_V == G_ARRAY) {
a0d0e21e 1180 dPOPPOPssrl;
86cb7173 1181
5b295bef
RD		 1182 SvGETMAGIC(left);
1183 SvGETMAGIC(right);
a0d0e21e 1184
8e9bbdb9 1185 if (RANGE_IS_NUMERIC(left,right)) {
b262c4c9 1186 IV i, j, n;
4d91eccc
FC		 1187 if ((SvOK(left) && !SvIOK(left) && SvNV_nomg(left) < IV_MIN) ||
1188 (SvOK(right) && (SvIOK(right)
1189 ? SvIsUV(right) && SvUV(right) > IV_MAX
1190 : SvNV_nomg(right) > IV_MAX)))
d470f89e 1191 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad 1192 i = SvIV_nomg(left);
b262c4c9
JH		 1193 j = SvIV_nomg(right);
1194 if (j >= i) {
1195 /* Dance carefully around signed max. */
1196 bool overflow = (i <= 0 && j > SSize_t_MAX + i - 1);
1197 if (!overflow) {
1198 n = j - i + 1;
1199 /* The wraparound of signed integers is undefined
1200 * behavior, but here we aim for count >=1, and
1201 * negative count is just wrong. */
1202 if (n < 1)
1203 overflow = TRUE;
1204 }
1205 if (overflow)
1206 Perl_croak(aTHX_ "Out of memory during list extend");
1207 EXTEND_MORTAL(n);
1208 EXTEND(SP, n);
bbce6d69 1209 }
c1ab3db2 1210 else
b262c4c9
JH		 1211 n = 0;
1212 while (n--) {
fc01cab4 1213 SV * const sv = sv_2mortal(newSViv(i));
a0d0e21e 1214 PUSHs(sv);
fc01cab4
DM		 1215 if (n) /* avoid incrementing above IV_MAX */
1216 i++;
a0d0e21e
LW		 1217 }
1218 }
1219 else {
3c323193
FC		 1220 STRLEN len, llen;
1221 const char * const lpv = SvPV_nomg_const(left, llen);
f52e41ad 1222 const char * const tmps = SvPV_nomg_const(right, len);
a0d0e21e 1223
3c323193 1224 SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP);
89ea2908 1225 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1226 XPUSHs(sv);
b15aece3 1227 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1228 break;
a0d0e21e
LW		 1229 sv = sv_2mortal(newSVsv(sv));
1230 sv_inc(sv);
1231 }
a0d0e21e
LW		 1232 }
1233 }
1234 else {
1235 dTOPss;
901017d6 1236 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1237 int flop = 0;
a0d0e21e 1238 sv_inc(targ);
4e3399f9
YST		 1239
1240 if (PL_op->op_private & OPpFLIP_LINENUM) {
1241 if (GvIO(PL_last_in_gv)) {
1242 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1243 }
1244 else {
fafc274c 1245 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST		 1246 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1247 }
1248 }
1249 else {
1250 flop = SvTRUE(sv);
1251 }
1252
1253 if (flop) {
a0d0e21e 1254 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1255 sv_catpvs(targ, "E0");
a0d0e21e
LW		 1256 }
1257 SETs(targ);
1258 }
1259
1260 RETURN;
1261}
1262
1263/* Control. */
1264
27da23d5 1265static const char * const context_name[] = {
515afda2 1266 "pseudo-block",
f31522f3 1267 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1268 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1269 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC		 1270 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1271 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1272 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1273 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1274 "subroutine",
76753e7f 1275 "format",
515afda2 1276 "eval",
515afda2 1277 "substitution",
515afda2
NC		 1278};
1279
76e3520e 1280STATIC I32
5db1eb8d 1281S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags)
a0d0e21e 1282{
eb578fdb 1283 I32 i;
a0d0e21e 1284
7918f24d
NC		 1285 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1286
a0d0e21e 1287 for (i = cxstack_ix; i >= 0; i--) {
eb578fdb 1288 const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1289 switch (CxTYPE(cx)) {
a0d0e21e 1290 case CXt_SUBST:
a0d0e21e 1291 case CXt_SUB:
7766f137 1292 case CXt_FORMAT:
a0d0e21e 1293 case CXt_EVAL:
0a753a76 1294 case CXt_NULL:
dcbac5bb 1295 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC		 1296 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1297 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC		 1298 if (CxTYPE(cx) == CXt_NULL)
1299 return -1;
1300 break;
c6fdafd0 1301 case CXt_LOOP_LAZYIV:
d01136d6 1302 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1303 case CXt_LOOP_FOR:
1304 case CXt_LOOP_PLAIN:
7e8f1eac 1305 {
5db1eb8d
BF		 1306 STRLEN cx_label_len = 0;
1307 U32 cx_label_flags = 0;
1308 const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags);
1309 if (!cx_label || !(
1310 ( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
1311 (flags & SVf_UTF8)
1312 ? (bytes_cmp_utf8(
1313 (const U8*)cx_label, cx_label_len,
1314 (const U8*)label, len) == 0)
1315 : (bytes_cmp_utf8(
1316 (const U8*)label, len,
1317 (const U8*)cx_label, cx_label_len) == 0)
eade7155
BF		 1318 : (len == cx_label_len && ((cx_label == label)
1319 || memEQ(cx_label, label, len))) )) {
1c98cc53 1320 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1321 (long)i, cx_label));
a0d0e21e
LW		 1322 continue;
1323 }
1c98cc53 1324 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1325 return i;
7e8f1eac 1326 }
a0d0e21e
LW		 1327 }
1328 }
1329 return i;
1330}
1331
0d863452
RH		 1332
1333
e50aee73 1334I32
864dbfa3 1335Perl_dowantarray(pTHX)
e50aee73 1336{
f54cb97a 1337 const I32 gimme = block_gimme();
54310121 1338 return (gimme == G_VOID) ? G_SCALAR : gimme;
1339}
1340
1341I32
864dbfa3 1342Perl_block_gimme(pTHX)
54310121 1343{
06b5626a 1344 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1345 if (cxix < 0)
46fc3d4c 1346 return G_VOID;
e50aee73 1347
54310121 1348 switch (cxstack[cxix].blk_gimme) {
d2719217
GS		 1349 case G_VOID:
1350 return G_VOID;
54310121 1351 case G_SCALAR:
e50aee73 1352 return G_SCALAR;
54310121 1353 case G_ARRAY:
1354 return G_ARRAY;
1355 default:
cea2e8a9 1356 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
54310121 1357 }
a25b5927 1358 NOT_REACHED; /* NOTREACHED */
e50aee73
AD		 1359}
1360
78f9721b
SM		 1361I32
1362Perl_is_lvalue_sub(pTHX)
1363{
06b5626a 1364 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM		 1365 assert(cxix >= 0); /* We should only be called from inside subs */
1366
bafb2adc
NC		 1367 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1368 return CxLVAL(cxstack + cxix);
78f9721b
SM		 1369 else
1370 return 0;
1371}
1372
777d9014
FC		 1373/* only used by PUSHSUB */
1374I32
1375Perl_was_lvalue_sub(pTHX)
1376{
777d9014
FC		 1377 const I32 cxix = dopoptosub(cxstack_ix-1);
1378 assert(cxix >= 0); /* We should only be called from inside subs */
1379
1380 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1381 return CxLVAL(cxstack + cxix);
1382 else
1383 return 0;
1384}
1385
76e3520e 1386STATIC I32
901017d6 1387S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1388{
a0d0e21e 1389 I32 i;
7918f24d
NC		 1390
1391 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
81611534
JH		 1392#ifndef DEBUGGING
1393 PERL_UNUSED_CONTEXT;
1394#endif
7918f24d 1395
a0d0e21e 1396 for (i = startingblock; i >= 0; i--) {
eb578fdb 1397 const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1398 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1399 default:
1400 continue;
a0d0e21e 1401 case CXt_SUB:
5fbe8311
DM		 1402 /* in sub foo { /(?{...})/ }, foo ends up on the CX stack
1403 * twice; the first for the normal foo() call, and the second
1404 * for a faked up re-entry into the sub to execute the
1405 * code block. Hide this faked entry from the world. */
1406 if (cx->cx_type & CXp_SUB_RE_FAKE)
1407 continue;
c67159e1 1408 /* FALLTHROUGH */
5fbe8311 1409 case CXt_EVAL:
7766f137 1410 case CXt_FORMAT:
1c98cc53 1411 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1412 return i;
1413 }
1414 }
1415 return i;
1416}
1417
76e3520e 1418STATIC I32
cea2e8a9 1419S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e
LW		 1420{
1421 I32 i;
a0d0e21e 1422 for (i = startingblock; i >= 0; i--) {
eb578fdb 1423 const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1424 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1425 default:
1426 continue;
1427 case CXt_EVAL:
1c98cc53 1428 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1429 return i;
1430 }
1431 }
1432 return i;
1433}
1434
76e3520e 1435STATIC I32
cea2e8a9 1436S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e
LW		 1437{
1438 I32 i;
a0d0e21e 1439 for (i = startingblock; i >= 0; i--) {
eb578fdb 1440 const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1441 switch (CxTYPE(cx)) {
a0d0e21e 1442 case CXt_SUBST:
a0d0e21e 1443 case CXt_SUB:
7766f137 1444 case CXt_FORMAT:
a0d0e21e 1445 case CXt_EVAL:
0a753a76 1446 case CXt_NULL:
dcbac5bb 1447 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC		 1448 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1449 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC		 1450 if ((CxTYPE(cx)) == CXt_NULL)
1451 return -1;
1452 break;
c6fdafd0 1453 case CXt_LOOP_LAZYIV:
d01136d6 1454 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1455 case CXt_LOOP_FOR:
1456 case CXt_LOOP_PLAIN:
1c98cc53 1457 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1458 return i;
1459 }
1460 }
1461 return i;
1462}
1463
0d863452
RH		 1464STATIC I32
1465S_dopoptogiven(pTHX_ I32 startingblock)
1466{
1467 I32 i;
1468 for (i = startingblock; i >= 0; i--) {
eb578fdb 1469 const PERL_CONTEXT *cx = &cxstack[i];
0d863452
RH		 1470 switch (CxTYPE(cx)) {
1471 default:
1472 continue;
1473 case CXt_GIVEN:
1c98cc53 1474 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1475 return i;
3b719c58
NC		 1476 case CXt_LOOP_PLAIN:
1477 assert(!CxFOREACHDEF(cx));
1478 break;
c6fdafd0 1479 case CXt_LOOP_LAZYIV:
d01136d6 1480 case CXt_LOOP_LAZYSV:
3b719c58 1481 case CXt_LOOP_FOR:
0d863452 1482 if (CxFOREACHDEF(cx)) {
1c98cc53 1483 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH		 1484 return i;
1485 }
1486 }
1487 }
1488 return i;
1489}
1490
1491STATIC I32
1492S_dopoptowhen(pTHX_ I32 startingblock)
1493{
1494 I32 i;
1495 for (i = startingblock; i >= 0; i--) {
eb578fdb 1496 const PERL_CONTEXT *cx = &cxstack[i];
0d863452
RH		 1497 switch (CxTYPE(cx)) {
1498 default:
1499 continue;
1500 case CXt_WHEN:
1c98cc53 1501 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH		 1502 return i;
1503 }
1504 }
1505 return i;
1506}
1507
a0d0e21e 1508void
864dbfa3 1509Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1510{
a0d0e21e
LW		 1511 I32 optype;
1512
f144f1e3
DM		 1513 if (!PL_curstackinfo) /* can happen if die during thread cloning */
1514 return;
1515
a0d0e21e 1516 while (cxstack_ix > cxix) {
b0d9ce38 1517 SV *sv;
eb578fdb 1518 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1519 DEBUG_CX("UNWIND"); \
a0d0e21e 1520 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1521 switch (CxTYPE(cx)) {
c90c0ff4 1522 case CXt_SUBST:
1523 POPSUBST(cx);
1524 continue; /* not break */
a0d0e21e 1525 case CXt_SUB:
b0d9ce38
GS		 1526 POPSUB(cx,sv);
1527 LEAVESUB(sv);
a0d0e21e
LW		 1528 break;
1529 case CXt_EVAL:
1530 POPEVAL(cx);
1531 break;
c6fdafd0 1532 case CXt_LOOP_LAZYIV:
d01136d6 1533 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1534 case CXt_LOOP_FOR:
1535 case CXt_LOOP_PLAIN:
a0d0e21e
LW		 1536 POPLOOP(cx);
1537 break;
0a753a76 1538 case CXt_NULL:
a0d0e21e 1539 break;
7766f137
GS		 1540 case CXt_FORMAT:
1541 POPFORMAT(cx);
1542 break;
a0d0e21e 1543 }
c90c0ff4 1544 cxstack_ix--;
a0d0e21e 1545 }
1b6737cc 1546 PERL_UNUSED_VAR(optype);
a0d0e21e
LW		 1547}
1548
5a844595
GS		 1549void
1550Perl_qerror(pTHX_ SV *err)
1551{
7918f24d
NC		 1552 PERL_ARGS_ASSERT_QERROR;
1553
6b2fb389
DM		 1554 if (PL_in_eval) {
1555 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF		 1556 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1557 SVfARG(err));
6b2fb389
DM		 1558 }
1559 else
1560 sv_catsv(ERRSV, err);
1561 }
5a844595
GS		 1562 else if (PL_errors)
1563 sv_catsv(PL_errors, err);
1564 else
be2597df 1565 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM		 1566 if (PL_parser)
1567 ++PL_parser->error_count;
5a844595
GS		 1568}
1569
bb4c52e0 1570void
c5df3096 1571Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1572{
c5df3096 1573 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1574 U8 in_eval = PL_in_eval;
c5df3096 1575 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1576
96d9b9cd 1577 if (in_eval) {
a0d0e21e 1578 I32 cxix;
a0d0e21e 1579 I32 gimme;
a0d0e21e 1580
22a30693
Z		 1581 /*
1582 * Historically, perl used to set ERRSV ($@) early in the die
1583 * process and rely on it not getting clobbered during unwinding.
1584 * That sucked, because it was liable to get clobbered, so the
1585 * setting of ERRSV used to emit the exception from eval{} has
1586 * been moved to much later, after unwinding (see just before
1587 * JMPENV_JUMP below). However, some modules were relying on the
1588 * early setting, by examining $@ during unwinding to use it as
1589 * a flag indicating whether the current unwinding was caused by
1590 * an exception. It was never a reliable flag for that purpose,
1591 * being totally open to false positives even without actual
1592 * clobberage, but was useful enough for production code to
1593 * semantically rely on it.
1594 *
1595 * We'd like to have a proper introspective interface that
1596 * explicitly describes the reason for whatever unwinding
1597 * operations are currently in progress, so that those modules
1598 * work reliably and $@ isn't further overloaded. But we don't
1599 * have one yet. In its absence, as a stopgap measure, ERRSV is
1600 * now *additionally* set here, before unwinding, to serve as the
1601 * (unreliable) flag that it used to.
1602 *
1603 * This behaviour is temporary, and should be removed when a
1604 * proper way to detect exceptional unwinding has been developed.
1605 * As of 2010-12, the authors of modules relying on the hack
1606 * are aware of the issue, because the modules failed on
1607 * perls 5.13.{1..7} which had late setting of $@ without this
1608 * early-setting hack.
1609 */
1610 if (!(in_eval & EVAL_KEEPERR)) {
1611 SvTEMP_off(exceptsv);
1612 sv_setsv(ERRSV, exceptsv);
1613 }
1614
fc941f37
Z		 1615 if (in_eval & EVAL_KEEPERR) {
1616 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1617 SVfARG(exceptsv));
1618 }
1619
5a844595
GS		 1620 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1621 && PL_curstackinfo->si_prev)
1622 {
bac4b2ad 1623 dounwind(-1);
d3acc0f7 1624 POPSTACK;
bac4b2ad 1625 }
e336de0d 1626
a0d0e21e
LW		 1627 if (cxix >= 0) {
1628 I32 optype;
b6494f15 1629 SV *namesv;
eb578fdb 1630 PERL_CONTEXT *cx;
901017d6 1631 SV **newsp;
e32ff4e1 1632#ifdef DEBUGGING
8f89e5a9 1633 COP *oldcop;
20189068 1634#endif
8f89e5a9
Z		 1635 JMPENV *restartjmpenv;
1636 OP *restartop;
a0d0e21e
LW		 1637
1638 if (cxix < cxstack_ix)
1639 dounwind(cxix);
1640
3280af22 1641 POPBLOCK(cx,PL_curpm);
6b35e009 1642 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1643 STRLEN msglen;
96d9b9cd 1644 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1645 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1646 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW		 1647 my_exit(1);
1648 }
1649 POPEVAL(cx);
b6494f15 1650 namesv = cx->blk_eval.old_namesv;
e32ff4e1 1651#ifdef DEBUGGING
8f89e5a9 1652 oldcop = cx->blk_oldcop;
20189068 1653#endif
8f89e5a9
Z		 1654 restartjmpenv = cx->blk_eval.cur_top_env;
1655 restartop = cx->blk_eval.retop;
a0d0e21e
LW		 1656
1657 if (gimme == G_SCALAR)
3280af22
NIS		 1658 *++newsp = &PL_sv_undef;
1659 PL_stack_sp = newsp;
a0d0e21e
LW		 1660
1661 LEAVE;
748a9306 1662
7a2e2cd6 1663 if (optype == OP_REQUIRE) {
e32ff4e1 1664 assert (PL_curcop == oldcop);
b6494f15 1665 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1666 SvPVX_const(namesv),
c60dbbc3 1667 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1668 &PL_sv_undef, 0);
27e90453
DM		 1669 /* note that unlike pp_entereval, pp_require isn't
1670 * supposed to trap errors. So now that we've popped the
1671 * EVAL that pp_require pushed, and processed the error
1672 * message, rethrow the error */
ecad31f0
BF		 1673 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1674 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1675 SVs_TEMP)));
7a2e2cd6 1676 }
fc941f37 1677 if (!(in_eval & EVAL_KEEPERR))
96d9b9cd 1678 sv_setsv(ERRSV, exceptsv);
8f89e5a9
Z		 1679 PL_restartjmpenv = restartjmpenv;
1680 PL_restartop = restartop;
bb4c52e0 1681 JMPENV_JUMP(3);
e5964223 1682 NOT_REACHED; /* NOTREACHED */
a0d0e21e
LW		 1683 }
1684 }
87582a92 1685
96d9b9cd 1686 write_to_stderr(exceptsv);
f86702cc 1687 my_failure_exit();
e5964223 1688 NOT_REACHED; /* NOTREACHED */
a0d0e21e
LW		 1689}
1690
1691PP(pp_xor)
1692{
20b7effb 1693 dSP; dPOPTOPssrl;
a0d0e21e
LW		 1694 if (SvTRUE(left) != SvTRUE(right))
1695 RETSETYES;
1696 else
1697 RETSETNO;
1698}
1699
8dff4fc5 1700/*
dcccc8ff
KW		 1701
1702=head1 CV Manipulation Functions
1703
8dff4fc5
BM		 1704=for apidoc caller_cx
1705
72d33970 1706The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
8dff4fc5 1707returned C<PERL_CONTEXT> structure can be interrogated to find all the
72d33970 1708information returned to Perl by C<caller>. Note that XSUBs don't get a
8dff4fc5
BM		 1709stack frame, so C<caller_cx(0, NULL)> will return information for the
1710immediately-surrounding Perl code.
1711
1712This function skips over the automatic calls to C<&DB::sub> made on the
72d33970 1713behalf of the debugger. If the stack frame requested was a sub called by
8dff4fc5
BM		 1714C<DB::sub>, the return value will be the frame for the call to
1715C<DB::sub>, since that has the correct line number/etc. for the call
72d33970 1716site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
8dff4fc5
BM		 1717frame for the sub call itself.
1718
1719=cut
1720*/
1721
1722const PERL_CONTEXT *
1723Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1724{
eb578fdb
KW		 1725 I32 cxix = dopoptosub(cxstack_ix);
1726 const PERL_CONTEXT *cx;
1727 const PERL_CONTEXT *ccstack = cxstack;
901017d6 1728 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1729
a0d0e21e 1730 for (;;) {
2c375eb9
GS		 1731 /* we may be in a higher stacklevel, so dig down deeper */
1732 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1733 top_si = top_si->si_prev;
1734 ccstack = top_si->si_cxstack;
1735 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1736 }
8dff4fc5
BM		 1737 if (cxix < 0)
1738 return NULL;
f2a7f298
DG		 1739 /* caller() should not report the automatic calls to &DB::sub */
1740 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1741 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW		 1742 count++;
1743 if (!count--)
1744 break;
2c375eb9 1745 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1746 }
2c375eb9
GS		 1747
1748 cx = &ccstack[cxix];
8dff4fc5
BM		 1749 if (dbcxp) *dbcxp = cx;
1750
7766f137 1751 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1752 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1753 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1754 field below is defined for any cx. */
f2a7f298
DG		 1755 /* caller() should not report the automatic calls to &DB::sub */
1756 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1757 cx = &ccstack[dbcxix];
06a5b730 1758 }
1759
8dff4fc5
BM		 1760 return cx;
1761}
1762
1763PP(pp_caller)
1764{
8dff4fc5 1765 dSP;
eb578fdb 1766 const PERL_CONTEXT *cx;
8dff4fc5 1767 const PERL_CONTEXT *dbcx;
48ebc325 1768 I32 gimme = GIMME_V;
d527ce7c 1769 const HEK *stash_hek;
8dff4fc5 1770 I32 count = 0;
ce0b554b 1771 bool has_arg = MAXARG && TOPs;
25502127 1772 const COP *lcop;
8dff4fc5 1773
ce0b554b
FC		 1774 if (MAXARG) {
1775 if (has_arg)
8dff4fc5 1776 count = POPi;
ce0b554b
FC		 1777 else (void)POPs;
1778 }
8dff4fc5 1779
ce0b554b 1780 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5 1781 if (!cx) {
48ebc325 1782 if (gimme != G_ARRAY) {
8dff4fc5
BM		 1783 EXTEND(SP, 1);
1784 RETPUSHUNDEF;
1785 }
1786 RETURN;
1787 }
1788
fb55feef 1789 DEBUG_CX("CALLER");
d0279c7c 1790 assert(CopSTASH(cx->blk_oldcop));
e7886211
FC		 1791 stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV
1792 ? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop))
1793 : NULL;
48ebc325 1794 if (gimme != G_ARRAY) {
27d41816 1795 EXTEND(SP, 1);
d527ce7c 1796 if (!stash_hek)
3280af22 1797 PUSHs(&PL_sv_undef);
49d8d3a1
MB		 1798 else {
1799 dTARGET;
d527ce7c 1800 sv_sethek(TARG, stash_hek);
49d8d3a1
MB		 1801 PUSHs(TARG);
1802 }
a0d0e21e
LW		 1803 RETURN;
1804 }
a0d0e21e 1805
b3ca2e83 1806 EXTEND(SP, 11);
27d41816 1807
d527ce7c 1808 if (!stash_hek)
3280af22 1809 PUSHs(&PL_sv_undef);
d527ce7c
BF		 1810 else {
1811 dTARGET;
1812 sv_sethek(TARG, stash_hek);
1813 PUSHTARG;
1814 }
6e449a3a 1815 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
e6dae479 1816 lcop = closest_cop(cx->blk_oldcop, OpSIBLING(cx->blk_oldcop),
25502127
FC		 1817 cx->blk_sub.retop, TRUE);
1818 if (!lcop)
1819 lcop = cx->blk_oldcop;
1820 mPUSHi((I32)CopLINE(lcop));
ce0b554b 1821 if (!has_arg)
a0d0e21e 1822 RETURN;
7766f137
GS		 1823 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1824 /* So is ccstack[dbcxix]. */
a5f47741 1825 if (CvHASGV(dbcx->blk_sub.cv)) {
ecf05a58 1826 PUSHs(cv_name(dbcx->blk_sub.cv, 0, 0));
bf38a478 1827 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS		 1828 }
1829 else {
84bafc02 1830 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1831 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1832 }
a0d0e21e
LW		 1833 }
1834 else {
84bafc02 1835 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1836 mPUSHi(0);
a0d0e21e 1837 }
54310121 1838 gimme = (I32)cx->blk_gimme;
1839 if (gimme == G_VOID)
3280af22 1840 PUSHs(&PL_sv_undef);
54310121 1841 else
98625aca 1842 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1843 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1844 /* eval STRING */
85a64632 1845 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
78beb4ca
TC		 1846 SV *cur_text = cx->blk_eval.cur_text;
1847 if (SvCUR(cur_text) >= 2) {
1848 PUSHs(newSVpvn_flags(SvPVX(cur_text), SvCUR(cur_text)-2,
1849 SvUTF8(cur_text)|SVs_TEMP));
1850 }
1851 else {
1852 /* I think this is will always be "", but be sure */
1853 PUSHs(sv_2mortal(newSVsv(cur_text)));
1854 }
1855
3280af22 1856 PUSHs(&PL_sv_no);
0f79a09d 1857 }
811a4de9 1858 /* require */
0f79a09d 1859 else if (cx->blk_eval.old_namesv) {
6e449a3a 1860 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1861 PUSHs(&PL_sv_yes);
06a5b730 1862 }
811a4de9
GS		 1863 /* eval BLOCK (try blocks have old_namesv == 0) */
1864 else {
1865 PUSHs(&PL_sv_undef);
1866 PUSHs(&PL_sv_undef);
1867 }
4633a7c4 1868 }
a682de96
GS		 1869 else {
1870 PUSHs(&PL_sv_undef);
1871 PUSHs(&PL_sv_undef);
1872 }
bafb2adc 1873 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1874 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1875 {
66a1b24b 1876 AV * const ary = cx->blk_sub.argarray;
c70927a6 1877 const SSize_t off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1878
e1a80902 1879 Perl_init_dbargs(aTHX);
a0d0e21e 1880
3280af22
NIS		 1881 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1882 av_extend(PL_dbargs, AvFILLp(ary) + off);
1883 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1884 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1885 }
6e449a3a 1886 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS		 1887 {
1888 SV * mask ;
72dc9ed5 1889 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1890
f07626ad 1891 if (old_warnings == pWARN_NONE)
e476b1b5 1892 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
f07626ad
FC		 1893 else if (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0)
1894 mask = &PL_sv_undef ;
ac27b0f5 1895 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS		 1896 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1897 /* Get the bit mask for $warnings::Bits{all}, because
1898 * it could have been extended by warnings::register */
1899 SV **bits_all;
6673a63c 1900 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1901 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS		 1902 mask = newSVsv(*bits_all);
1903 }
1904 else {
1905 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1906 }
1907 }
e476b1b5 1908 else
72dc9ed5 1909 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1910 mPUSHs(mask);
e476b1b5 1911 }
b3ca2e83 1912
c28fe1ec 1913 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 1914 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 1915 : &PL_sv_undef);
a0d0e21e
LW		 1916 RETURN;
1917}
1918
a0d0e21e
LW		 1919PP(pp_reset)
1920{
39644a26 1921 dSP;
ca826051
FC		 1922 const char * tmps;
1923 STRLEN len = 0;
1924 if (MAXARG < 1 || (!TOPs && !POPs))
1925 tmps = NULL, len = 0;
1926 else
1927 tmps = SvPVx_const(POPs, len);
1928 sv_resetpvn(tmps, len, CopSTASH(PL_curcop));
3280af22 1929 PUSHs(&PL_sv_yes);
a0d0e21e
LW		 1930 RETURN;
1931}
1932
dd2155a4
DM		 1933/* like pp_nextstate, but used instead when the debugger is active */
1934
a0d0e21e
LW		 1935PP(pp_dbstate)
1936{
533c011a 1937 PL_curcop = (COP*)PL_op;
a0d0e21e 1938 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1939 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW		 1940 FREETMPS;
1941
f410a211
NC		 1942 PERL_ASYNC_CHECK();
1943
88df5f01 1944 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
a6d69523 1945 || PL_DBsingle_iv || PL_DBsignal_iv || PL_DBtrace_iv)
a0d0e21e 1946 {
39644a26 1947 dSP;
eb578fdb 1948 PERL_CONTEXT *cx;
f54cb97a 1949 const I32 gimme = G_ARRAY;
eb160463 1950 U8 hasargs;
0bd48802 1951 GV * const gv = PL_DBgv;
432d4561
JL		 1952 CV * cv = NULL;
1953
1954 if (gv && isGV_with_GP(gv))
1955 cv = GvCV(gv);
a0d0e21e 1956
c2cb6f77 1957 if (!cv || (!CvROOT(cv) && !CvXSUB(cv)))
cea2e8a9 1958 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1959
aea4f609
DM		 1960 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1961 /* don't do recursive DB::DB call */
a0d0e21e 1962 return NORMAL;
748a9306 1963
a57c6685 1964 ENTER;
4633a7c4
LW		 1965 SAVETMPS;
1966
3280af22 1967 SAVEI32(PL_debug);
55497cff 1968 SAVESTACK_POS();
3280af22 1969 PL_debug = 0;
748a9306 1970 hasargs = 0;
924508f0 1971 SPAGAIN;
748a9306 1972
aed2304a 1973 if (CvISXSUB(cv)) {
c127bd3a
SF		 1974 PUSHMARK(SP);
1975 (void)(*CvXSUB(cv))(aTHX_ cv);
c127bd3a 1976 FREETMPS;
a57c6685 1977 LEAVE;
c127bd3a
SF		 1978 return NORMAL;
1979 }
1980 else {
1981 PUSHBLOCK(cx, CXt_SUB, SP);
1982 PUSHSUB_DB(cx);
1983 cx->blk_sub.retop = PL_op->op_next;
1984 CvDEPTH(cv)++;
9d976ff5
FC		 1985 if (CvDEPTH(cv) >= 2) {
1986 PERL_STACK_OVERFLOW_CHECK();
1987 pad_push(CvPADLIST(cv), CvDEPTH(cv));
1988 }
c127bd3a 1989 SAVECOMPPAD();
9d976ff5 1990 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), CvDEPTH(cv));
c127bd3a
SF		 1991 RETURNOP(CvSTART(cv));
1992 }
a0d0e21e
LW		 1993 }
1994 else
1995 return NORMAL;
1996}
1997
2fc507dc
FC		 1998/* S_leave_common: Common code that many functions in this file use on
1999 scope exit. */
2000
2ec7f6f2
FC		 2001/* SVs on the stack that have any of the flags passed in are left as is.
2002 Other SVs are protected via the mortals stack if lvalue is true, and
2fc507dc
FC		 2003 copied otherwise.
2004
2005 Also, taintedness is cleared.
2006*/
2ec7f6f2 2007
b9d76716 2008STATIC SV **
2fc507dc 2009S_leave_common(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme,
2ec7f6f2 2010 U32 flags, bool lvalue)
b9d76716 2011{
9a214eec 2012 bool padtmp = 0;
2fc507dc 2013 PERL_ARGS_ASSERT_LEAVE_COMMON;
b9d76716 2014
80dd201b 2015 TAINT_NOT;
9a214eec
DM		 2016 if (flags & SVs_PADTMP) {
2017 flags &= ~SVs_PADTMP;
2018 padtmp = 1;
2019 }
b9d76716
VP		 2020 if (gimme == G_SCALAR) {
2021 if (MARK < SP)
9a214eec 2022 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2ec7f6f2
FC		 2023 ? *SP
2024 : lvalue
2025 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2026 : sv_mortalcopy(*SP);
b9d76716
VP		 2027 else {
2028 /* MEXTEND() only updates MARK, so reuse it instead of newsp. */
2029 MARK = newsp;
2030 MEXTEND(MARK, 1);
2031 *++MARK = &PL_sv_undef;
2032 return MARK;
2033 }
2034 }
2035 else if (gimme == G_ARRAY) {
2036 /* in case LEAVE wipes old return values */
2037 while (++MARK <= SP) {
9a214eec 2038 if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
b9d76716
VP		 2039 *++newsp = *MARK;
2040 else {
2ec7f6f2
FC		 2041 *++newsp = lvalue
2042 ? sv_2mortal(SvREFCNT_inc_simple_NN(*MARK))
2043 : sv_mortalcopy(*MARK);
b9d76716
VP		 2044 TAINT_NOT; /* Each item is independent */
2045 }
2046 }
2047 /* When this function was called with MARK == newsp, we reach this
2048 * point with SP == newsp. */
2049 }
2050
2051 return newsp;
2052}
2053
2b9a6457
VP		 2054PP(pp_enter)
2055{
20b7effb 2056 dSP;
eb578fdb 2057 PERL_CONTEXT *cx;
7c2d9d03 2058 I32 gimme = GIMME_V;
2b9a6457
VP		 2059
2060 ENTER_with_name("block");
2061
2062 SAVETMPS;
2063 PUSHBLOCK(cx, CXt_BLOCK, SP);
2064
2065 RETURN;
2066}
2067
2068PP(pp_leave)
2069{
20b7effb 2070 dSP;
eb578fdb 2071 PERL_CONTEXT *cx;
2b9a6457
VP		 2072 SV **newsp;
2073 PMOP *newpm;
2074 I32 gimme;
2075
2076 if (PL_op->op_flags & OPf_SPECIAL) {
2077 cx = &cxstack[cxstack_ix];
2078 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2079 }
2080
2081 POPBLOCK(cx,newpm);
2082
2083 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2084
2fc507dc 2085 SP = leave_common(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP,
2ec7f6f2 2086 PL_op->op_private & OPpLVALUE);
2b9a6457
VP		 2087 PL_curpm = newpm; /* Don't pop $1 et al till now */
2088
2089 LEAVE_with_name("block");
2090
2091 RETURN;
2092}
2093
eaa9f768
JH		 2094static bool
2095S_outside_integer(pTHX_ SV *sv)
2096{
2097 if (SvOK(sv)) {
2098 const NV nv = SvNV_nomg(sv);
415b66b2
JH		 2099 if (Perl_isinfnan(nv))
2100 return TRUE;
eaa9f768
JH		 2101#ifdef NV_PRESERVES_UV
2102 if (nv < (NV)IV_MIN || nv > (NV)IV_MAX)
2103 return TRUE;
2104#else
2105 if (nv <= (NV)IV_MIN)
2106 return TRUE;
2107 if ((nv > 0) &&
2108 ((nv > (NV)UV_MAX ||
2109 SvUV_nomg(sv) > (UV)IV_MAX)))
2110 return TRUE;
2111#endif
2112 }
2113 return FALSE;
2114}
2115
a0d0e21e
LW		 2116PP(pp_enteriter)
2117{
20b7effb 2118 dSP; dMARK;
eb578fdb 2119 PERL_CONTEXT *cx;
f54cb97a 2120 const I32 gimme = GIMME_V;
df530c37 2121 void *itervar; /* location of the iteration variable */
840fe433 2122 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2123
d343c3ef 2124 ENTER_with_name("loop1");
4633a7c4
LW		 2125 SAVETMPS;
2126
aafca525
DM		 2127 if (PL_op->op_targ) { /* "my" variable */
2128 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM		 2129 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2130 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2131 SVs_PADSTALE, SVs_PADSTALE);
2132 }
09edbca0 2133 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
89e00a7c 2134#ifdef USE_ITHREADS
df530c37 2135 itervar = PL_comppad;
89e00a7c 2136#else
aafca525 2137 itervar = &PAD_SVl(PL_op->op_targ);
7766f137 2138#endif
54b9620d 2139 }
d39c26a6 2140 else if (LIKELY(isGV(TOPs))) { /* symbol table variable */
159b6efe 2141 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM		 2142 SV** svp = &GvSV(gv);
2143 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2144 *svp = newSV(0);
df530c37 2145 itervar = (void *)gv;
c997e362 2146 save_aliased_sv(gv);
54b9620d 2147 }
d39c26a6
FC		 2148 else {
2149 SV * const sv = POPs;
2150 assert(SvTYPE(sv) == SVt_PVMG);
2151 assert(SvMAGIC(sv));
2152 assert(SvMAGIC(sv)->mg_type == PERL_MAGIC_lvref);
2153 itervar = (void *)sv;
2154 cxtype |= CXp_FOR_LVREF;
2155 }
4633a7c4 2156
0d863452
RH		 2157 if (PL_op->op_private & OPpITER_DEF)
2158 cxtype |= CXp_FOR_DEF;
2159
d343c3ef 2160 ENTER_with_name("loop2");
a0d0e21e 2161
7766f137 2162 PUSHBLOCK(cx, cxtype, SP);
df530c37 2163 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2164 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS		 2165 SV *maybe_ary = POPs;
2166 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2167 dPOPss;
d01136d6 2168 SV * const right = maybe_ary;
d39c26a6
FC		 2169 if (UNLIKELY(cxtype & CXp_FOR_LVREF))
2170 DIE(aTHX_ "Assigned value is not a reference");
984a4bea
RD		 2171 SvGETMAGIC(sv);
2172 SvGETMAGIC(right);
4fe3f0fa 2173 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2174 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC		 2175 cx->cx_type |= CXt_LOOP_LAZYIV;
2176 /* Make sure that no-one re-orders cop.h and breaks our
2177 assumptions */
2178 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
eaa9f768
JH		 2179 if (S_outside_integer(aTHX_ sv) ||
2180 S_outside_integer(aTHX_ right))
076d9a11 2181 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC		 2182 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2183 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM		 2184#ifdef DEBUGGING
2185 /* for correct -Dstv display */
2186 cx->blk_oldsp = sp - PL_stack_base;
2187#endif
89ea2908 2188 }
3f63a782 2189 else {
d01136d6
BS		 2190 cx->cx_type &= ~CXTYPEMASK;
2191 cx->cx_type |= CXt_LOOP_LAZYSV;
2192 /* Make sure that no-one re-orders cop.h and breaks our
2193 assumptions */
2194 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2195 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2196 cx->blk_loop.state_u.lazysv.end = right;
2197 SvREFCNT_inc(right);
2198 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC		 2199 /* This will do the upgrade to SVt_PV, and warn if the value
2200 is uninitialised. */
10516c54 2201 (void) SvPV_nolen_const(right);
267cc4a8
NC		 2202 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2203 to replace !SvOK() with a pointer to "". */
2204 if (!SvOK(right)) {
2205 SvREFCNT_dec(right);
d01136d6 2206 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2207 }
3f63a782 2208 }
89ea2908 2209 }
d01136d6 2210 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2211 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS		 2212 SvREFCNT_inc(maybe_ary);
2213 cx->blk_loop.state_u.ary.ix =
2214 (PL_op->op_private & OPpITER_REVERSED) ?
2215 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2216 -1;
ef3e5ea9 2217 }
89ea2908 2218 }
d01136d6
BS		 2219 else { /* iterating over items on the stack */
2220 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2221 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2222 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC		 2223 }
2224 else {
d01136d6 2225 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2226 }
4633a7c4 2227 }
a0d0e21e
LW		 2228
2229 RETURN;
2230}
2231
2232PP(pp_enterloop)
2233{
20b7effb 2234 dSP;
eb578fdb 2235 PERL_CONTEXT *cx;
f54cb97a 2236 const I32 gimme = GIMME_V;
a0d0e21e 2237
d343c3ef 2238 ENTER_with_name("loop1");
a0d0e21e 2239 SAVETMPS;
d343c3ef 2240 ENTER_with_name("loop2");
a0d0e21e 2241
3b719c58
NC		 2242 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2243 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW		 2244
2245 RETURN;
2246}
2247
2248PP(pp_leaveloop)
2249{
20b7effb 2250 dSP;
eb578fdb 2251 PERL_CONTEXT *cx;
a0d0e21e
LW		 2252 I32 gimme;
2253 SV **newsp;
2254 PMOP *newpm;
2255 SV **mark;
2256
2257 POPBLOCK(cx,newpm);
3b719c58 2258 assert(CxTYPE_is_LOOP(cx));
4fdae800 2259 mark = newsp;
a8bba7fa 2260 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2261
2fc507dc 2262 SP = leave_common(newsp, SP, MARK, gimme, 0,
a373464f 2263 PL_op->op_private & OPpLVALUE);
f86702cc 2264 PUTBACK;
2265
a8bba7fa 2266 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2267 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2268
d343c3ef
GG		 2269 LEAVE_with_name("loop2");
2270 LEAVE_with_name("loop1");
a0d0e21e 2271
f86702cc 2272 return NORMAL;
a0d0e21e
LW		 2273}
2274
3bdf583b
FC		 2275STATIC void
2276S_return_lvalues(pTHX_ SV **mark, SV **sp, SV **newsp, I32 gimme,
d25b0d7b 2277 PERL_CONTEXT *cx, PMOP *newpm)
3bdf583b 2278{
80422e24 2279 const bool ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2280 if (gimme == G_SCALAR) {
d25b0d7b
FC		 2281 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2282 SV *sv;
001de122 2283 const char *what = NULL;
d25b0d7b
FC		 2284 if (MARK < SP) {
2285 assert(MARK+1 == SP);
3885a45a 2286 if ((SvPADTMP(TOPs) || SvREADONLY(TOPs)) &&
d25b0d7b 2287 !SvSMAGICAL(TOPs)) {
001de122 2288 what =
d25b0d7b 2289 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2290 : "a readonly value" : "a temporary";
d25b0d7b 2291 }
001de122 2292 else goto copy_sv;
d25b0d7b
FC		 2293 }
2294 else {
2295 /* sub:lvalue{} will take us here. */
001de122 2296 what = "undef";
d25b0d7b 2297 }
001de122
FC		 2298 LEAVE;
2299 cxstack_ix--;
2300 POPSUB(cx,sv);
2301 PL_curpm = newpm;
2302 LEAVESUB(sv);
2303 Perl_croak(aTHX_
2304 "Can't return %s from lvalue subroutine", what
2305 );
d25b0d7b 2306 }
93905212 2307 if (MARK < SP) {
a5ad7a5a 2308 copy_sv:
3bdf583b 2309 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
5811c07e 2310 if (!SvPADTMP(*SP)) {
3bdf583b
FC		 2311 *++newsp = SvREFCNT_inc(*SP);
2312 FREETMPS;
2313 sv_2mortal(*newsp);
5811c07e
FC		 2314 }
2315 else {
2316 /* FREETMPS could clobber it */
2317 SV *sv = SvREFCNT_inc(*SP);
2318 FREETMPS;
2319 *++newsp = sv_mortalcopy(sv);
2320 SvREFCNT_dec(sv);
2321 }
3bdf583b
FC		 2322 }
2323 else
e08be60b 2324 *++newsp =
5811c07e
FC		 2325 SvPADTMP(*SP)
2326 ? sv_mortalcopy(*SP)
2327 : !SvTEMP(*SP)
e08be60b
FC		 2328 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2329 : *SP;
3bdf583b 2330 }
0d235c77
FC		 2331 else {
2332 EXTEND(newsp,1);
3bdf583b 2333 *++newsp = &PL_sv_undef;
0d235c77 2334 }
0e9700df 2335 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC		 2336 SvGETMAGIC(TOPs);
2337 if (!SvOK(TOPs)) {
0e9700df 2338 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC		 2339 }
2340 }
3bdf583b
FC		 2341 }
2342 else if (gimme == G_ARRAY) {
0e9700df 2343 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2344 if (ref || !CxLVAL(cx))
e08be60b
FC		 2345 while (++MARK <= SP)
2346 *++newsp =
5811c07e 2347 SvFLAGS(*MARK) & SVs_PADTMP
80422e24 2348 ? sv_mortalcopy(*MARK)
5811c07e
FC		 2349 : SvTEMP(*MARK)
2350 ? *MARK
80422e24 2351 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e08be60b 2352 else while (++MARK <= SP) {
d25b0d7b 2353 if (*MARK != &PL_sv_undef
3885a45a 2354 && (SvPADTMP(*MARK) || SvREADONLY(*MARK))
d25b0d7b 2355 ) {
3885a45a 2356 const bool ro = cBOOL( SvREADONLY(*MARK) );
d25b0d7b
FC		 2357 SV *sv;
2358 /* Might be flattened array after $#array = */
2359 PUTBACK;
2360 LEAVE;
2361 cxstack_ix--;
2362 POPSUB(cx,sv);
2363 PL_curpm = newpm;
2364 LEAVESUB(sv);
ae917476 2365 /* diag_listed_as: Can't return %s from lvalue subroutine */
d25b0d7b
FC		 2366 Perl_croak(aTHX_
2367 "Can't return a %s from lvalue subroutine",
3885a45a 2368 ro ? "readonly value" : "temporary");
d25b0d7b
FC		 2369 }
2370 else
4bee03f8
FC		 2371 *++newsp =
2372 SvTEMP(*MARK)
2373 ? *MARK
2374 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC		 2375 }
2376 }
2377 PL_stack_sp = newsp;
2378}
2379
a0d0e21e
LW		 2380PP(pp_return)
2381{
20b7effb 2382 dSP; dMARK;
eb578fdb 2383 PERL_CONTEXT *cx;
f86702cc 2384 bool popsub2 = FALSE;
b45de488 2385 bool clear_errsv = FALSE;
fa1e92c4 2386 bool lval = FALSE;
a0d0e21e
LW		 2387 I32 gimme;
2388 SV **newsp;
2389 PMOP *newpm;
2390 I32 optype = 0;
b6494f15 2391 SV *namesv;
b0d9ce38 2392 SV *sv;
b263a1ad 2393 OP *retop = NULL;
a0d0e21e 2394
0bd48802
AL		 2395 const I32 cxix = dopoptosub(cxstack_ix);
2396
9850bf21
RH		 2397 if (cxix < 0) {
2398 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2399 * sort block, which is a CXt_NULL
2400 * not a CXt_SUB */
2401 dounwind(0);
d7507f74
RH		 2402 PL_stack_base[1] = *PL_stack_sp;
2403 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW		 2404 return 0;
2405 }
9850bf21
RH		 2406 else
2407 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2408 }
a0d0e21e
LW		 2409 if (cxix < cxstack_ix)
2410 dounwind(cxix);
2411
d7507f74
RH		 2412 if (CxMULTICALL(&cxstack[cxix])) {
2413 gimme = cxstack[cxix].blk_gimme;
2414 if (gimme == G_VOID)
2415 PL_stack_sp = PL_stack_base;
2416 else if (gimme == G_SCALAR) {
2417 PL_stack_base[1] = *PL_stack_sp;
2418 PL_stack_sp = PL_stack_base + 1;
2419 }
9850bf21 2420 return 0;
d7507f74 2421 }
9850bf21 2422
a0d0e21e 2423 POPBLOCK(cx,newpm);
6b35e009 2424 switch (CxTYPE(cx)) {
a0d0e21e 2425 case CXt_SUB:
f86702cc 2426 popsub2 = TRUE;
fa1e92c4 2427 lval = !!CvLVALUE(cx->blk_sub.cv);
f39bc417 2428 retop = cx->blk_sub.retop;
5dd42e15 2429 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW		 2430 break;
2431 case CXt_EVAL:
b45de488
GS		 2432 if (!(PL_in_eval & EVAL_KEEPERR))
2433 clear_errsv = TRUE;
a0d0e21e 2434 POPEVAL(cx);
b6494f15 2435 namesv = cx->blk_eval.old_namesv;
f39bc417 2436 retop = cx->blk_eval.retop;
1d76a5c3
GS		 2437 if (CxTRYBLOCK(cx))
2438 break;
748a9306
LW		 2439 if (optype == OP_REQUIRE &&
2440 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2441 {
54310121 2442 /* Unassume the success we assumed earlier. */
b6494f15 2443 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 2444 SvPVX_const(namesv),
c60dbbc3 2445 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15
VP		 2446 G_DISCARD);
2447 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
748a9306 2448 }
a0d0e21e 2449 break;
7766f137 2450 case CXt_FORMAT:
f39bc417 2451 retop = cx->blk_sub.retop;
25375124 2452 POPFORMAT(cx);
7766f137 2453 break;
a0d0e21e 2454 default:
5637ef5b 2455 DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW		 2456 }
2457
a1f49e72 2458 TAINT_NOT;
d25b0d7b 2459 if (lval) S_return_lvalues(aTHX_ MARK, SP, newsp, gimme, cx, newpm);
3bdf583b
FC		 2460 else {
2461 if (gimme == G_SCALAR) {
a29cdaf0
IZ		 2462 if (MARK < SP) {
2463 if (popsub2) {
a8bba7fa 2464 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
6f48390a
FC		 2465 if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1
2466 && !SvMAGICAL(TOPs)) {
a29cdaf0
IZ		 2467 *++newsp = SvREFCNT_inc(*SP);
2468 FREETMPS;
2469 sv_2mortal(*newsp);
959e3673
GS		 2470 }
2471 else {
2472 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2473 FREETMPS;
959e3673
GS		 2474 *++newsp = sv_mortalcopy(sv);
2475 SvREFCNT_dec(sv);
a29cdaf0 2476 }
959e3673 2477 }
6f48390a
FC		 2478 else if (SvTEMP(*SP) && SvREFCNT(*SP) == 1
2479 && !SvMAGICAL(*SP)) {
767eda44 2480 *++newsp = *SP;
767eda44 2481 }
959e3673 2482 else
767eda44 2483 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2484 }
2485 else
a29cdaf0 2486 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2487 }
2488 else
3280af22 2489 *++newsp = &PL_sv_undef;
3bdf583b
FC		 2490 }
2491 else if (gimme == G_ARRAY) {
a1f49e72 2492 while (++MARK <= SP) {
3ed94dc0 2493 *++newsp = popsub2 && SvTEMP(*MARK) && SvREFCNT(*MARK) == 1
6f48390a 2494 && !SvGMAGICAL(*MARK)
f86702cc 2495 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2496 TAINT_NOT; /* Each item is independent */
2497 }
3bdf583b
FC		 2498 }
2499 PL_stack_sp = newsp;
a0d0e21e 2500 }
a0d0e21e 2501
5dd42e15 2502 LEAVE;
f86702cc 2503 /* Stack values are safe: */
2504 if (popsub2) {
5dd42e15 2505 cxstack_ix--;
b0d9ce38 2506 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2507 }
b0d9ce38 2508 else
c445ea15 2509 sv = NULL;
3280af22 2510 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2511
b0d9ce38 2512 LEAVESUB(sv);
8433848b 2513 if (clear_errsv) {
ab69dbc2 2514 CLEAR_ERRSV();
8433848b 2515 }
f39bc417 2516 return retop;
a0d0e21e
LW		 2517}
2518
4f443c3d
FC		 2519/* This duplicates parts of pp_leavesub, so that it can share code with
2520 * pp_return */
2521PP(pp_leavesublv)
2522{
20b7effb 2523 dSP;
4f443c3d
FC		 2524 SV **newsp;
2525 PMOP *newpm;
2526 I32 gimme;
eb578fdb 2527 PERL_CONTEXT *cx;
4f443c3d
FC		 2528 SV *sv;
2529
2530 if (CxMULTICALL(&cxstack[cxstack_ix]))
2531 return 0;
2532
2533 POPBLOCK(cx,newpm);
2534 cxstack_ix++; /* temporarily protect top context */
4f443c3d
FC		 2535
2536 TAINT_NOT;
2537
0d235c77 2538 S_return_lvalues(aTHX_ newsp, SP, newsp, gimme, cx, newpm);
4f443c3d
FC		 2539
2540 LEAVE;
4f443c3d 2541 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
25375124 2542 cxstack_ix--;
4f443c3d
FC		 2543 PL_curpm = newpm; /* ... and pop $1 et al */
2544
2545 LEAVESUB(sv);
2546 return cx->blk_sub.retop;
2547}
2548
1f039d60
FC		 2549static I32
2550S_unwind_loop(pTHX_ const char * const opname)
a0d0e21e 2551{
a0d0e21e 2552 I32 cxix;
1f039d60
FC		 2553 if (PL_op->op_flags & OPf_SPECIAL) {
2554 cxix = dopoptoloop(cxstack_ix);
2555 if (cxix < 0)
2556 /* diag_listed_as: Can't "last" outside a loop block */
2557 Perl_croak(aTHX_ "Can't \"%s\" outside a loop block", opname);
2558 }
2559 else {
2560 dSP;
2561 STRLEN label_len;
2562 const char * const label =
2563 PL_op->op_flags & OPf_STACKED
2564 ? SvPV(TOPs,label_len)
2565 : (label_len = strlen(cPVOP->op_pv), cPVOP->op_pv);
2566 const U32 label_flags =
2567 PL_op->op_flags & OPf_STACKED
2568 ? SvUTF8(POPs)
2569 : (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2570 PUTBACK;
2571 cxix = dopoptolabel(label, label_len, label_flags);
2572 if (cxix < 0)
2573 /* diag_listed_as: Label not found for "last %s" */
2574 Perl_croak(aTHX_ "Label not found for \"%s %"SVf"\"",
2575 opname,
2576 SVfARG(PL_op->op_flags & OPf_STACKED
2577 && !SvGMAGICAL(TOPp1s)
2578 ? TOPp1s
2579 : newSVpvn_flags(label,
2580 label_len,
2581 label_flags | SVs_TEMP)));
2582 }
2583 if (cxix < cxstack_ix)
2584 dounwind(cxix);
2585 return cxix;
2586}
2587
2588PP(pp_last)
2589{
eb578fdb 2590 PERL_CONTEXT *cx;
f86702cc 2591 I32 pop2 = 0;
a0d0e21e 2592 I32 gimme;
8772537c 2593 I32 optype;
b263a1ad 2594 OP *nextop = NULL;
a0d0e21e
LW		 2595 SV **newsp;
2596 PMOP *newpm;
c445ea15 2597 SV *sv = NULL;
9d4ba2ae 2598
1f039d60 2599 S_unwind_loop(aTHX_ "last");
a0d0e21e
LW		 2600
2601 POPBLOCK(cx,newpm);
5dd42e15 2602 cxstack_ix++; /* temporarily protect top context */
6b35e009 2603 switch (CxTYPE(cx)) {
c6fdafd0 2604 case CXt_LOOP_LAZYIV:
d01136d6 2605 case CXt_LOOP_LAZYSV:
3b719c58
NC		 2606 case CXt_LOOP_FOR:
2607 case CXt_LOOP_PLAIN:
2608 pop2 = CxTYPE(cx);
a8bba7fa 2609 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2610 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2611 break;
f86702cc 2612 case CXt_SUB:
f86702cc 2613 pop2 = CXt_SUB;
f39bc417 2614 nextop = cx->blk_sub.retop;
a0d0e21e 2615 break;
f86702cc 2616 case CXt_EVAL:
2617 POPEVAL(cx);
f39bc417 2618 nextop = cx->blk_eval.retop;
a0d0e21e 2619 break;
7766f137
GS		 2620 case CXt_FORMAT:
2621 POPFORMAT(cx);
f39bc417 2622 nextop = cx->blk_sub.retop;
7766f137 2623 break;
a0d0e21e 2624 default:
5637ef5b 2625 DIE(aTHX_ "panic: last, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW		 2626 }
2627
a1f49e72 2628 TAINT_NOT;
0c0c317c 2629 PL_stack_sp = newsp;
f86702cc 2630
5dd42e15
DM		 2631 LEAVE;
2632 cxstack_ix--;
f86702cc 2633 /* Stack values are safe: */
2634 switch (pop2) {
c6fdafd0 2635 case CXt_LOOP_LAZYIV:
3b719c58 2636 case CXt_LOOP_PLAIN:
d01136d6 2637 case CXt_LOOP_LAZYSV:
3b719c58 2638 case CXt_LOOP_FOR:
a8bba7fa 2639 POPLOOP(cx); /* release loop vars ... */
4fdae800 2640 LEAVE;
f86702cc 2641 break;
2642 case CXt_SUB:
b0d9ce38 2643 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2644 break;
a0d0e21e 2645 }
3280af22 2646 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2647
b0d9ce38 2648 LEAVESUB(sv);
9d4ba2ae
AL		 2649 PERL_UNUSED_VAR(optype);
2650 PERL_UNUSED_VAR(gimme);
f86702cc 2651 return nextop;
a0d0e21e
LW		 2652}
2653
2654PP(pp_next)
2655{
eb578fdb 2656 PERL_CONTEXT *cx;
1f039d60 2657 const I32 inner = PL_scopestack_ix;
a0d0e21e 2658
1f039d60 2659 S_unwind_loop(aTHX_ "next");
a0d0e21e 2660
85538317
GS		 2661 /* clear off anything above the scope we're re-entering, but
2662 * save the rest until after a possible continue block */
1ba6ee2b 2663 TOPBLOCK(cx);
85538317
GS		 2664 if (PL_scopestack_ix < inner)
2665 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2666 PL_curcop = cx->blk_oldcop;
47c9d59f 2667 PERL_ASYNC_CHECK();
d57ce4df 2668 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW		 2669}
2670
2671PP(pp_redo)
2672{
1f039d60 2673 const I32 cxix = S_unwind_loop(aTHX_ "redo");
eb578fdb 2674 PERL_CONTEXT *cx;
a0d0e21e 2675 I32 oldsave;
1f039d60 2676 OP* redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a0d0e21e 2677
a034e688
DM		 2678 if (redo_op->op_type == OP_ENTER) {
2679 /* pop one less context to avoid $x being freed in while (my $x..) */
2680 cxstack_ix++;
2681 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2682 redo_op = redo_op->op_next;
2683 }
2684
a0d0e21e 2685 TOPBLOCK(cx);
3280af22 2686 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2687 LEAVE_SCOPE(oldsave);
936c78b5 2688 FREETMPS;
3a1b2b9e 2689 PL_curcop = cx->blk_oldcop;
47c9d59f 2690 PERL_ASYNC_CHECK();
a034e688 2691 return redo_op;
a0d0e21e
LW		 2692}
2693
0824fdcb 2694STATIC OP *
5db1eb8d 2695S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit)
a0d0e21e 2696{
a0d0e21e 2697 OP **ops = opstack;
a1894d81 2698 static const char* const too_deep = "Target of goto is too deeply nested";
a0d0e21e 2699
7918f24d
NC		 2700 PERL_ARGS_ASSERT_DOFINDLABEL;
2701
fc36a67e 2702 if (ops >= oplimit)
0157ef98 2703 Perl_croak(aTHX_ "%s", too_deep);
11343788
MB		 2704 if (o->op_type == OP_LEAVE ||
2705 o->op_type == OP_SCOPE ||
2706 o->op_type == OP_LEAVELOOP ||
33d34e4c 2707 o->op_type == OP_LEAVESUB ||
11343788 2708 o->op_type == OP_LEAVETRY)
fc36a67e 2709 {
5dc0d613 2710 *ops++ = cUNOPo->op_first;
fc36a67e 2711 if (ops >= oplimit)
0157ef98 2712 Perl_croak(aTHX_ "%s", too_deep);
fc36a67e 2713 }
c4aa4e48 2714 *ops = 0;
11343788 2715 if (o->op_flags & OPf_KIDS) {
aec46f14 2716 OP *kid;
a0d0e21e 2717 /* First try all the kids at this level, since that's likeliest. */
e6dae479 2718 for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) {
7e8f1eac 2719 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
5db1eb8d
BF		 2720 STRLEN kid_label_len;
2721 U32 kid_label_flags;
2722 const char *kid_label = CopLABEL_len_flags(kCOP,
2723 &kid_label_len, &kid_label_flags);
2724 if (kid_label && (
2725 ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
2726 (flags & SVf_UTF8)
2727 ? (bytes_cmp_utf8(
2728 (const U8*)kid_label, kid_label_len,
2729 (const U8*)label, len) == 0)
2730 : (bytes_cmp_utf8(
2731 (const U8*)label, len,
2732 (const U8*)kid_label, kid_label_len) == 0)
eade7155
BF		 2733 : ( len == kid_label_len && ((kid_label == label)
2734 || memEQ(kid_label, label, len)))))
7e8f1eac
AD		 2735 return kid;
2736 }
a0d0e21e 2737 }
e6dae479 2738 for (kid = cUNOPo->op_first; kid; kid = OpSIBLING(kid)) {
3280af22 2739 if (kid == PL_lastgotoprobe)
a0d0e21e 2740 continue;
ed8d0fe2
SM		 2741 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2742 if (ops == opstack)
2743 *ops++ = kid;
2744 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2745 ops[-1]->op_type == OP_DBSTATE)
2746 ops[-1] = kid;
2747 else
2748 *ops++ = kid;
2749 }
5db1eb8d 2750 if ((o = dofindlabel(kid, label, len, flags, ops, oplimit)))
11343788 2751 return o;
a0d0e21e
LW		 2752 }
2753 }
c4aa4e48 2754 *ops = 0;
a0d0e21e
LW		 2755 return 0;
2756}
2757
b1c05ba5
DM		 2758
2759/* also used for: pp_dump() */
2760
2761PP(pp_goto)
a0d0e21e 2762{
27da23d5 2763 dVAR; dSP;
cbbf8932 2764 OP *retop = NULL;
a0d0e21e 2765 I32 ix;
eb578fdb 2766 PERL_CONTEXT *cx;
fc36a67e 2767#define GOTO_DEPTH 64
2768 OP *enterops[GOTO_DEPTH];
cbbf8932 2769 const char *label = NULL;
5db1eb8d
BF		 2770 STRLEN label_len = 0;
2771 U32 label_flags = 0;
bfed75c6 2772 const bool do_dump = (PL_op->op_type == OP_DUMP);
a1894d81 2773 static const char* const must_have_label = "goto must have label";
a0d0e21e 2774
533c011a 2775 if (PL_op->op_flags & OPf_STACKED) {
7d1d69cb
DM		 2776 /* goto EXPR or goto &foo */
2777
9d4ba2ae 2778 SV * const sv = POPs;
55b37f1c 2779 SvGETMAGIC(sv);
a0d0e21e
LW		 2780
2781 /* This egregious kludge implements goto &subroutine */
2782 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2783 I32 cxix;
eb578fdb 2784 PERL_CONTEXT *cx;
ea726b52 2785 CV *cv = MUTABLE_CV(SvRV(sv));
049bd5ff 2786 AV *arg = GvAV(PL_defgv);
a0d0e21e
LW		 2787 I32 oldsave;
2788
e8f7dd13 2789 retry:
4aa0a1f7 2790 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2791 const GV * const gv = CvGV(cv);
e8f7dd13 2792 if (gv) {
7fc63493 2793 GV *autogv;
e8f7dd13
GS		 2794 SV *tmpstr;
2795 /* autoloaded stub? */
2796 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2797 goto retry;
c271df94
BF		 2798 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2799 GvNAMELEN(gv),
2800 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS		 2801 if (autogv && (cv = GvCV(autogv)))
2802 goto retry;
2803 tmpstr = sv_newmortal();
c445ea15 2804 gv_efullname3(tmpstr, gv, NULL);
be2597df 2805 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2806 }
cea2e8a9 2807 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD		 2808 }
2809
a0d0e21e 2810 /* First do some returnish stuff. */
b37c2d43 2811 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2812 FREETMPS;
a0d0e21e 2813 cxix = dopoptosub(cxstack_ix);
8da3792e
S		 2814 if (cxix < cxstack_ix) {
2815 if (cxix < 0) {
2816 SvREFCNT_dec(cv);
2817 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2818 }
a0d0e21e 2819 dounwind(cxix);
8da3792e 2820 }
a0d0e21e 2821 TOPBLOCK(cx);
2d43a17f 2822 SPAGAIN;
564abe23 2823 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2824 if (CxTYPE(cx) == CXt_EVAL) {
110af908 2825 SvREFCNT_dec(cv);
c74ace89 2826 if (CxREALEVAL(cx))
00455a92 2827 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89
DM		 2828 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2829 else
00455a92 2830 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89 2831 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2832 }
9850bf21 2833 else if (CxMULTICALL(cx))
110af908
FC		 2834 {
2835 SvREFCNT_dec(cv);
9850bf21 2836 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
110af908 2837 }
bafb2adc 2838 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
a0d0e21e 2839 AV* av = cx->blk_sub.argarray;
bfed75c6 2840
049bd5ff
FC		 2841 /* abandon the original @_ if it got reified or if it is
2842 the same as the current @_ */
2843 if (AvREAL(av) || av == arg) {
b1464ded 2844 SvREFCNT_dec(av);
d8b46c1b 2845 av = newAV();
11ca45c0 2846 AvREIFY_only(av);
ad64d0ec 2847 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2848 }
049bd5ff 2849 else CLEAR_ARGARRAY(av);
a0d0e21e 2850 }
049bd5ff
FC		 2851 /* We donate this refcount later to the callee’s pad. */
2852 SvREFCNT_inc_simple_void(arg);
6b35e009 2853 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2854 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2855 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2856 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW		 2857 LEAVE_SCOPE(oldsave);
2858
1d59c038
FC		 2859 /* A destructor called during LEAVE_SCOPE could have undefined
2860 * our precious cv. See bug #99850. */
2861 if (!CvROOT(cv) && !CvXSUB(cv)) {
2862 const GV * const gv = CvGV(cv);
049bd5ff 2863 SvREFCNT_dec(arg);
1d59c038
FC		 2864 if (gv) {
2865 SV * const tmpstr = sv_newmortal();
2866 gv_efullname3(tmpstr, gv, NULL);
2867 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",
2868 SVfARG(tmpstr));
2869 }
2870 DIE(aTHX_ "Goto undefined subroutine");
2871 }
2872
a0d0e21e
LW		 2873 /* Now do some callish stuff. */
2874 SAVETMPS;
5023d17a 2875 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2876 if (CvISXSUB(cv)) {
cb65b687
DM		 2877 SV **newsp;
2878 I32 gimme;
ad39f3a2 2879 const SSize_t items = arg ? AvFILL(arg) + 1 : 0;
cd313eb4 2880 const bool m = arg ? cBOOL(SvRMAGICAL(arg)) : 0;
049bd5ff
FC		 2881 SV** mark;
2882
cb65b687
DM		 2883 PERL_UNUSED_VAR(newsp);
2884 PERL_UNUSED_VAR(gimme);
2885
049bd5ff 2886 /* put GvAV(defgv) back onto stack */
8c9d3376
FC		 2887 if (items) {
2888 EXTEND(SP, items+1); /* @_ could have been extended. */
8c9d3376 2889 }
049bd5ff 2890 mark = SP;
ad39f3a2 2891 if (items) {
de935cc9 2892 SSize_t index;
ad39f3a2 2893 bool r = cBOOL(AvREAL(arg));
b1464ded 2894 for (index=0; index<items; index++)
ad39f3a2
FC		 2895 {
2896 SV *sv;
2897 if (m) {
2898 SV ** const svp = av_fetch(arg, index, 0);
2899 sv = svp ? *svp : NULL;
dd2a7f90 2900 }
ad39f3a2
FC		 2901 else sv = AvARRAY(arg)[index];
2902 SP[index+1] = sv
2903 ? r ? SvREFCNT_inc_NN(sv_2mortal(sv)) : sv
2904 : sv_2mortal(newSVavdefelem(arg, index, 1));
2905 }
049bd5ff 2906 }
ad39f3a2 2907 SP += items;
049bd5ff
FC		 2908 SvREFCNT_dec(arg);
2909 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
2910 /* Restore old @_ */
2911 arg = GvAV(PL_defgv);
2912 GvAV(PL_defgv) = cx->blk_sub.savearray;
2913 SvREFCNT_dec(arg);
b1464ded 2914 }
1fa4e549 2915
51eb35b5 2916 retop = cx->blk_sub.retop;
b37c2d43
AL		 2917 /* XS subs don't have a CxSUB, so pop it */
2918 POPBLOCK(cx, PL_curpm);
2919 /* Push a mark for the start of arglist */
2920 PUSHMARK(mark);
2921 PUTBACK;
2922 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2923 LEAVE;
51eb35b5 2924 goto _return;
a0d0e21e
LW		 2925 }
2926 else {
b70d5558 2927 PADLIST * const padlist = CvPADLIST(cv);
a0d0e21e 2928 cx->blk_sub.cv = cv;
1a5b3db4 2929 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2930
a0d0e21e
LW		 2931 CvDEPTH(cv)++;
2932 if (CvDEPTH(cv) < 2)
74c765eb 2933 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2934 else {
2b9dff67 2935 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2936 sub_crush_depth(cv);
26019298 2937 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2938 }
426a09cd 2939 PL_curcop = cx->blk_oldcop;
fd617465
DM		 2940 SAVECOMPPAD();
2941 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2942 if (CxHASARGS(cx))
6d4ff0d2 2943 {
dd2155a4 2944 CX_CURPAD_SAVE(cx->blk_sub);
a0d0e21e 2945
049bd5ff
FC		 2946 /* cx->blk_sub.argarray has no reference count, so we
2947 need something to hang on to our argument array so
2948 that cx->blk_sub.argarray does not end up pointing
2949 to freed memory as the result of undef *_. So put
2950 it in the callee’s pad, donating our refer-
2951 ence count. */
bfa371b6
FC		 2952 if (arg) {
2953 SvREFCNT_dec(PAD_SVl(0));
2954 PAD_SVl(0) = (SV *)(cx->blk_sub.argarray = arg);
2955 }
049bd5ff
FC		 2956
2957 /* GvAV(PL_defgv) might have been modified on scope
2958 exit, so restore it. */
2959 if (arg != GvAV(PL_defgv)) {
2960 AV * const av = GvAV(PL_defgv);
2961 GvAV(PL_defgv) = (AV *)SvREFCNT_inc_simple(arg);
2962 SvREFCNT_dec(av);
a0d0e21e
LW		 2963 }
2964 }
049bd5ff 2965 else SvREFCNT_dec(arg);
491527d0 2966 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2967 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2968 if (PERLDB_GOTO) {
b96d8cd9 2969 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL		 2970 if (gotocv) {
2971 PUSHMARK( PL_stack_sp );
ad64d0ec 2972 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL		 2973 PL_stack_sp--;
2974 }
491527d0 2975 }
1ce6579f 2976 }
51eb35b5
DD		 2977 retop = CvSTART(cv);
2978 goto putback_return;
a0d0e21e
LW		 2979 }
2980 }
1614b0e3 2981 else {
7d1d69cb 2982 /* goto EXPR */
55b37f1c 2983 label = SvPV_nomg_const(sv, label_len);
5db1eb8d 2984 label_flags = SvUTF8(sv);
1614b0e3 2985 }
a0d0e21e 2986 }
2fc690dc 2987 else if (!(PL_op->op_flags & OPf_SPECIAL)) {
7d1d69cb 2988 /* goto LABEL or dump LABEL */
5db1eb8d
BF		 2989 label = cPVOP->op_pv;
2990 label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2991 label_len = strlen(label);
2992 }
0157ef98 2993 if (!(do_dump || label_len)) DIE(aTHX_ "%s", must_have_label);
a0d0e21e 2994
f410a211
NC		 2995 PERL_ASYNC_CHECK();
2996
3532f34a 2997 if (label_len) {
cbbf8932 2998 OP *gotoprobe = NULL;
3b2447bc 2999 bool leaving_eval = FALSE;
33d34e4c 3000 bool in_block = FALSE;
cbbf8932 3001 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW		 3002
3003 /* find label */
3004
d4c19fe8 3005 PL_lastgotoprobe = NULL;
a0d0e21e
LW		 3006 *enterops = 0;
3007 for (ix = cxstack_ix; ix >= 0; ix--) {
3008 cx = &cxstack[ix];
6b35e009 3009 switch (CxTYPE(cx)) {
a0d0e21e 3010 case CXt_EVAL:
3b2447bc 3011 leaving_eval = TRUE;
971ecbe6 3012 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH		 3013 gotoprobe = (last_eval_cx ?
3014 last_eval_cx->blk_eval.old_eval_root :
3015 PL_eval_root);
3016 last_eval_cx = cx;
9c5794fe
RH		 3017 break;
3018 }
3019 /* else fall through */
c6fdafd0 3020 case CXt_LOOP_LAZYIV:
d01136d6 3021 case CXt_LOOP_LAZYSV:
3b719c58
NC		 3022 case CXt_LOOP_FOR:
3023 case CXt_LOOP_PLAIN:
bb5aedc1
VP		 3024 case CXt_GIVEN:
3025 case CXt_WHEN:
e6dae479 3026 gotoprobe = OpSIBLING(cx->blk_oldcop);
a0d0e21e
LW		 3027 break;
3028 case CXt_SUBST:
3029 continue;
3030 case CXt_BLOCK:
33d34e4c 3031 if (ix) {
e6dae479 3032 gotoprobe = OpSIBLING(cx->blk_oldcop);
33d34e4c
AE		 3033 in_block = TRUE;
3034 } else
3280af22 3035 gotoprobe = PL_main_root;
a0d0e21e 3036 break;
b3933176 3037 case CXt_SUB:
9850bf21 3038 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS		 3039 gotoprobe = CvROOT(cx->blk_sub.cv);
3040 break;
3041 }
924ba076 3042 /* FALLTHROUGH */
7766f137 3043 case CXt_FORMAT:
0a753a76 3044 case CXt_NULL:
a651a37d 3045 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW		 3046 default:
3047 if (ix)
5637ef5b
NC		 3048 DIE(aTHX_ "panic: goto, type=%u, ix=%ld",
3049 CxTYPE(cx), (long) ix);
3280af22 3050 gotoprobe = PL_main_root;
a0d0e21e
LW		 3051 break;
3052 }
2b597662 3053 if (gotoprobe) {
29e61fd9
DM		 3054 OP *sibl1, *sibl2;
3055
5db1eb8d 3056 retop = dofindlabel(gotoprobe, label, label_len, label_flags,
2b597662
GS		 3057 enterops, enterops + GOTO_DEPTH);
3058 if (retop)
3059 break;
e6dae479 3060 if ( (sibl1 = OpSIBLING(gotoprobe)) &&
29e61fd9 3061 sibl1->op_type == OP_UNSTACK &&
e6dae479 3062 (sibl2 = OpSIBLING(sibl1)))
29e61fd9
DM		 3063 {
3064 retop = dofindlabel(sibl2,
5db1eb8d
BF		 3065 label, label_len, label_flags, enterops,
3066 enterops + GOTO_DEPTH);
eae48c89
Z		 3067 if (retop)
3068 break;
3069 }
2b597662 3070 }
3280af22 3071 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW		 3072 }
3073 if (!retop)
b17a0679
FC		 3074 DIE(aTHX_ "Can't find label %"UTF8f,
3075 UTF8fARG(label_flags, label_len, label));
a0d0e21e 3076
3b2447bc
RH		 3077 /* if we're leaving an eval, check before we pop any frames
3078 that we're not going to punt, otherwise the error
3079 won't be caught */
3080
3081 if (leaving_eval && *enterops && enterops[1]) {
3082 I32 i;
3083 for (i = 1; enterops[i]; i++)
3084 if (enterops[i]->op_type == OP_ENTERITER)
3085 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
3086 }
3087
b500e03b
GG		 3088 if (*enterops && enterops[1]) {
3089 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3090 if (enterops[i])
3091 deprecate("\"goto\" to jump into a construct");
3092 }
3093
a0d0e21e
LW		 3094 /* pop unwanted frames */
3095
3096 if (ix < cxstack_ix) {
3097 I32 oldsave;
3098
3099 if (ix < 0)
5edb7975 3100 DIE(aTHX_ "panic: docatch: illegal ix=%ld", (long)ix);
a0d0e21e
LW		 3101 dounwind(ix);
3102 TOPBLOCK(cx);
3280af22 3103 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW		 3104 LEAVE_SCOPE(oldsave);
3105 }
3106
3107 /* push wanted frames */
3108
748a9306 3109 if (*enterops && enterops[1]) {
0bd48802 3110 OP * const oldop = PL_op;
33d34e4c
AE		 3111 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3112 for (; enterops[ix]; ix++) {
533c011a 3113 PL_op = enterops[ix];
84902520
TB		 3114 /* Eventually we may want to stack the needed arguments
3115 * for each op. For now, we punt on the hard ones. */
533c011a 3116 if (PL_op->op_type == OP_ENTERITER)
894356b3 3117 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3118 PL_op->op_ppaddr(aTHX);
a0d0e21e 3119 }
533c011a 3120 PL_op = oldop;
a0d0e21e
LW		 3121 }
3122 }
3123
51eb35b5
DD		 3124 else {
3125 assert(do_dump);
a5f75d66 3126#ifdef VMS
6b88bc9c 3127 if (!retop) retop = PL_main_start;
a5f75d66 3128#endif
3280af22
NIS		 3129 PL_restartop = retop;
3130 PL_do_undump = TRUE;
a0d0e21e
LW		 3131
3132 my_unexec();
3133
3280af22
NIS		 3134 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3135 PL_do_undump = FALSE;
a0d0e21e
LW		 3136 }
3137
51eb35b5
DD		 3138 putback_return:
3139 PL_stack_sp = sp;
3140 _return:
47c9d59f 3141 PERL_ASYNC_CHECK();
51eb35b5 3142 return retop;
a0d0e21e
LW		 3143}
3144
3145PP(pp_exit)
3146{
39644a26 3147 dSP;
a0d0e21e
LW		 3148 I32 anum;
3149
3150 if (MAXARG < 1)
3151 anum = 0;
9d3c658e
FC		 3152 else if (!TOPs) {
3153 anum = 0; (void)POPs;
3154 }
ff0cee69 3155 else {
a0d0e21e 3156 anum = SvIVx(POPs);
d98f61e7 3157#ifdef VMS
5450b4d8
FC		 3158 if (anum == 1
3159 && SvTRUE(cop_hints_fetch_pvs(PL_curcop, "vmsish_exit", 0)))
ff0cee69 3160 anum = 0;
97124ef6
FC		 3161 VMSISH_HUSHED =
3162 VMSISH_HUSHED || (PL_curcop->op_private & OPpHUSH_VMSISH);
ff0cee69 3163#endif
3164 }
cc3604b1 3165 PL_exit_flags |= PERL_EXIT_EXPECTED;
a0d0e21e 3166 my_exit(anum);
3280af22 3167 PUSHs(&PL_sv_undef);
a0d0e21e
LW		 3168 RETURN;
3169}
3170
a0d0e21e
LW		 3171/* Eval. */
3172
0824fdcb 3173STATIC void
cea2e8a9 3174S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3175{
504618e9 3176 const char *s = SvPVX_const(sv);
890ce7af 3177 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3178 I32 line = 1;
a0d0e21e 3179
7918f24d
NC		 3180 PERL_ARGS_ASSERT_SAVE_LINES;
3181
a0d0e21e 3182 while (s && s < send) {
f54cb97a 3183 const char *t;
b9f83d2f 3184 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3185
1d963ff3 3186 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW		 3187 if (t)
3188 t++;
3189 else
3190 t = send;
3191
3192 sv_setpvn(tmpstr, s, t - s);
3193 av_store(array, line++, tmpstr);
3194 s = t;
3195 }
3196}
3197
22f16304
RU		 3198/*
3199=for apidoc docatch
3200
3201Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3202
32030 is used as continue inside eval,
3204
32053 is used for a die caught by an inner eval - continue inner loop
3206
3207See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
3208establish a local jmpenv to handle exception traps.
3209
3210=cut
3211*/
0824fdcb 3212STATIC OP *
cea2e8a9 3213S_docatch(pTHX_ OP *o)
1e422769 3214{
6224f72b 3215 int ret;
06b5626a 3216 OP * const oldop = PL_op;
db36c5a1 3217 dJMPENV;
1e422769 3218
1e422769 3219#ifdef DEBUGGING
54310121 3220 assert(CATCH_GET == TRUE);
1e422769 3221#endif
312caa8e 3222 PL_op = o;
8bffa5f8 3223
14dd3ad8 3224 JMPENV_PUSH(ret);
6224f72b 3225 switch (ret) {
312caa8e 3226 case 0:
abd70938
DM		 3227 assert(cxstack_ix >= 0);
3228 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3229 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3230 redo_body:
85aaa934 3231 CALLRUNOPS(aTHX);
312caa8e
CS		 3232 break;
3233 case 3:
8bffa5f8 3234 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z		 3235 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3236 PL_restartjmpenv = NULL;
312caa8e
CS		 3237 PL_op = PL_restartop;
3238 PL_restartop = 0;
3239 goto redo_body;
3240 }
924ba076 3241 /* FALLTHROUGH */
312caa8e 3242 default:
14dd3ad8 3243 JMPENV_POP;
533c011a 3244 PL_op = oldop;
6224f72b 3245 JMPENV_JUMP(ret);
e5964223 3246 NOT_REACHED; /* NOTREACHED */
1e422769 3247 }
14dd3ad8 3248 JMPENV_POP;
533c011a 3249 PL_op = oldop;
5f66b61c 3250 return NULL;
1e422769 3251}
3252
a3985cdc
DM		 3253
3254/*
3255=for apidoc find_runcv
3256
3257Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM		 3258If db_seqp is non_null, skip CVs that are in the DB package and populate
3259*db_seqp with the cop sequence number at the point that the DB:: code was
72d33970
FC		 3260entered. (This allows debuggers to eval in the scope of the breakpoint
3261rather than in the scope of the debugger itself.)
a3985cdc
DM		 3262
3263=cut
3264*/
3265
3266CV*
d819b83a 3267Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3268{
db4cf31d 3269 return Perl_find_runcv_where(aTHX_ 0, 0, db_seqp);
70794f7b
FC		 3270}
3271
3272/* If this becomes part of the API, it might need a better name. */
3273CV *
db4cf31d 3274Perl_find_runcv_where(pTHX_ U8 cond, IV arg, U32 *db_seqp)
70794f7b 3275{
a3985cdc 3276 PERL_SI *si;
b4b0692a 3277 int level = 0;
a3985cdc 3278
d819b83a 3279 if (db_seqp)
c3923c33
DM		 3280 *db_seqp =
3281 PL_curcop == &PL_compiling
3282 ? PL_cop_seqmax
3283 : PL_curcop->cop_seq;
3284
a3985cdc 3285 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3286 I32 ix;
a3985cdc 3287 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3288 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
70794f7b 3289 CV *cv = NULL;
d819b83a 3290 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
70794f7b 3291 cv = cx->blk_sub.cv;
d819b83a
DM		 3292 /* skip DB:: code */
3293 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3294 *db_seqp = cx->blk_oldcop->cop_seq;
3295 continue;
3296 }
a453e28a
DM		 3297 if (cx->cx_type & CXp_SUB_RE)
3298 continue;
d819b83a 3299 }
a3985cdc 3300 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
70794f7b
FC		 3301 cv = cx->blk_eval.cv;
3302 if (cv) {
3303 switch (cond) {
db4cf31d
FC		 3304 case FIND_RUNCV_padid_eq:
3305 if (!CvPADLIST(cv)
b4db5868 3306 || CvPADLIST(cv)->xpadl_id != (U32)arg)
8771da69 3307 continue;
b4b0692a
FC		 3308 return cv;
3309 case FIND_RUNCV_level_eq:
db4cf31d 3310 if (level++ != arg) continue;
70794f7b
FC		 3311 /* GERONIMO! */
3312 default:
3313 return cv;
3314 }
3315 }
a3985cdc
DM		 3316 }
3317 }
db4cf31d 3318 return cond == FIND_RUNCV_padid_eq ? NULL : PL_main_cv;
a3985cdc
DM		 3319}
3320
3321
27e90453
DM		 3322/* Run yyparse() in a setjmp wrapper. Returns:
3323 * 0: yyparse() successful
3324 * 1: yyparse() failed
3325 * 3: yyparse() died
3326 */
3327STATIC int
28ac2b49 3328S_try_yyparse(pTHX_ int gramtype)
27e90453
DM		 3329{
3330 int ret;
3331 dJMPENV;
3332
3333 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3334 JMPENV_PUSH(ret);
3335 switch (ret) {
3336 case 0:
28ac2b49 3337 ret = yyparse(gramtype) ? 1 : 0;
27e90453
DM		 3338 break;
3339 case 3:
3340 break;
3341 default:
3342 JMPENV_POP;
3343 JMPENV_JUMP(ret);
e5964223 3344 NOT_REACHED; /* NOTREACHED */
27e90453
DM		 3345 }
3346 JMPENV_POP;
3347 return ret;
3348}
3349
3350
104a8185
DM		 3351/* Compile a require/do or an eval ''.
3352 *
a3985cdc 3353 * outside is the lexically enclosing CV (if any) that invoked us.
104a8185
DM		 3354 * seq is the current COP scope value.
3355 * hh is the saved hints hash, if any.
3356 *
410be5db 3357 * Returns a bool indicating whether the compile was successful; if so,
104a8185
DM		 3358 * PL_eval_start contains the first op of the compiled code; otherwise,
3359 * pushes undef.
3360 *
3361 * This function is called from two places: pp_require and pp_entereval.
3362 * These can be distinguished by whether PL_op is entereval.
7d116edc
FC		 3363 */
3364
410be5db 3365STATIC bool
104a8185 3366S_doeval(pTHX_ int gimme, CV* outside, U32 seq, HV *hh)
a0d0e21e 3367{
20b7effb 3368 dSP;
46c461b5 3369 OP * const saveop = PL_op;
104a8185 3370 bool clear_hints = saveop->op_type != OP_ENTEREVAL;
f45b078d 3371 COP * const oldcurcop = PL_curcop;
26c9400e 3372 bool in_require = (saveop->op_type == OP_REQUIRE);
27e90453 3373 int yystatus;
676a678a 3374 CV *evalcv;
a0d0e21e 3375
27e90453 3376 PL_in_eval = (in_require
6dc8a9e4 3377 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
a1941760
DM		 3378 : (EVAL_INEVAL |
3379 ((PL_op->op_private & OPpEVAL_RE_REPARSING)
3380 ? EVAL_RE_REPARSING : 0)));
a0d0e21e 3381
1ce6579f 3382 PUSHMARK(SP);
3383
676a678a
Z		 3384 evalcv = MUTABLE_CV(newSV_type(SVt_PVCV));
3385 CvEVAL_on(evalcv);
2090ab20 3386 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
676a678a 3387 cxstack[cxstack_ix].blk_eval.cv = evalcv;
86a64801 3388 cxstack[cxstack_ix].blk_gimme = gimme;
2090ab20 3389
676a678a
Z		 3390 CvOUTSIDE_SEQ(evalcv) = seq;
3391 CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3392
dd2155a4 3393 /* set up a scratch pad */
a0d0e21e 3394
eacbb379 3395 CvPADLIST_set(evalcv, pad_new(padnew_SAVE));
cecbe010 3396 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3397
07055b4c 3398
b5bbe64a 3399 SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */
748a9306 3400
a0d0e21e
LW		 3401 /* make sure we compile in the right package */
3402
ed094faf 3403 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
03d9f026 3404 SAVEGENERICSV(PL_curstash);
cb1ad50e
FC		 3405 PL_curstash = (HV *)CopSTASH(PL_curcop);
3406 if (SvTYPE(PL_curstash) != SVt_PVHV) PL_curstash = NULL;
3407 else SvREFCNT_inc_simple_void(PL_curstash);
a0d0e21e 3408 }
3c10abe3 3409 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS		 3410 SAVESPTR(PL_beginav);
3411 PL_beginav = newAV();
3412 SAVEFREESV(PL_beginav);
3c10abe3
AG		 3413 SAVESPTR(PL_unitcheckav);
3414 PL_unitcheckav = newAV();
3415 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3416
81d86705 3417
104a8185 3418 ENTER_with_name("evalcomp");
676a678a
Z		 3419 SAVESPTR(PL_compcv);
3420 PL_compcv = evalcv;
3421
a0d0e21e
LW		 3422 /* try to compile it */
3423
5f66b61c 3424 PL_eval_root = NULL;
3280af22 3425 PL_curcop = &PL_compiling;
26c9400e 3426 if ((saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3427 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS		 3428 else
3429 CLEAR_ERRSV();
27e90453 3430
377b5421
DM		 3431 SAVEHINTS();
3432 if (clear_hints) {
3433 PL_hints = 0;
3434 hv_clear(GvHV(PL_hintgv));
3435 }
3436 else {
3437 PL_hints = saveop->op_private & OPpEVAL_COPHH
3438 ? oldcurcop->cop_hints : saveop->op_targ;
4f3e2518
DM		 3439
3440 /* making 'use re eval' not be in scope when compiling the
3441 * qr/mabye_has_runtime_code_block/ ensures that we don't get
3442 * infinite recursion when S_has_runtime_code() gives a false
3443 * positive: the second time round, HINT_RE_EVAL isn't set so we
3444 * don't bother calling S_has_runtime_code() */
3445 if (PL_in_eval & EVAL_RE_REPARSING)
3446 PL_hints &= ~HINT_RE_EVAL;
3447
377b5421
DM		 3448 if (hh) {
3449 /* SAVEHINTS created a new HV in PL_hintgv, which we need to GC */
3450 SvREFCNT_dec(GvHV(PL_hintgv));
3451 GvHV(PL_hintgv) = hh;
3452 }
3453 }
3454 SAVECOMPILEWARNINGS();
3455 if (clear_hints) {
3456 if (PL_dowarn & G_WARN_ALL_ON)
3457 PL_compiling.cop_warnings = pWARN_ALL ;
3458 else if (PL_dowarn & G_WARN_ALL_OFF)
3459 PL_compiling.cop_warnings = pWARN_NONE ;
3460 else
3461 PL_compiling.cop_warnings = pWARN_STD ;
3462 }
3463 else {
3464 PL_compiling.cop_warnings =
3465 DUP_WARNINGS(oldcurcop->cop_warnings);
3466 cophh_free(CopHINTHASH_get(&PL_compiling));
3467 if (Perl_cop_fetch_label(aTHX_ oldcurcop, NULL, NULL)) {
3468 /* The label, if present, is the first entry on the chain. So rather
3469 than writing a blank label in front of it (which involves an
3470 allocation), just use the next entry in the chain. */
3471 PL_compiling.cop_hints_hash
3472 = cophh_copy(oldcurcop->cop_hints_hash->refcounted_he_next);
3473 /* Check the assumption that this removed the label. */
3474 assert(Perl_cop_fetch_label(aTHX_ &PL_compiling, NULL, NULL) == NULL);
f45b078d 3475 }
377b5421
DM		 3476 else
3477 PL_compiling.cop_hints_hash = cophh_copy(oldcurcop->cop_hints_hash);
3478 }
f45b078d 3479
a88d97bf 3480 CALL_BLOCK_HOOKS(bhk_eval, saveop);
52db365a 3481
27e90453
DM		 3482 /* note that yyparse() may raise an exception, e.g. C<BEGIN{die}>,
3483 * so honour CATCH_GET and trap it here if necessary */
3484
28ac2b49 3485 yystatus = (!in_require && CATCH_GET) ? S_try_yyparse(aTHX_ GRAMPROG) : yyparse(GRAMPROG);
27e90453
DM		 3486
3487 if (yystatus || PL_parser->error_count || !PL_eval_root) {
0c58d367 3488 SV **newsp; /* Used by POPBLOCK. */
d164302a 3489 PERL_CONTEXT *cx;
27e90453 3490 I32 optype; /* Used by POPEVAL. */
d164302a 3491 SV *namesv;
eed484f9 3492 SV *errsv = NULL;
bfed75c6 3493
d164302a
GG		 3494 cx = NULL;
3495 namesv = NULL;
27e90453
DM		 3496 PERL_UNUSED_VAR(newsp);
3497 PERL_UNUSED_VAR(optype);
3498
c86ffc32
DM		 3499 /* note that if yystatus == 3, then the EVAL CX block has already
3500 * been popped, and various vars restored */
533c011a 3501 PL_op = saveop;
27e90453 3502 if (yystatus != 3) {
c86ffc32
DM		 3503 if (PL_eval_root) {
3504 op_free(PL_eval_root);
3505 PL_eval_root = NULL;
3506 }
27e90453 3507 SP = PL_stack_base + POPMARK; /* pop original mark */
377b5421
DM		 3508 POPBLOCK(cx,PL_curpm);
3509 POPEVAL(cx);
3510 namesv = cx->blk_eval.old_namesv;
bbde7ba3 3511 /* POPBLOCK renders LEAVE_with_name("evalcomp") unnecessary. */
27e90453 3512 LEAVE_with_name("eval"); /* pp_entereval knows about this LEAVE. */
cd6472fc 3513 }
9d4ba2ae 3514
eed484f9 3515 errsv = ERRSV;
27e90453 3516 if (in_require) {
b6494f15
VP		 3517 if (!cx) {
3518 /* If cx is still NULL, it means that we didn't go in the
3519 * POPEVAL branch. */
3520 cx = &cxstack[cxstack_ix];
3521 assert(CxTYPE(cx) == CXt_EVAL);
3522 namesv = cx->blk_eval.old_namesv;
3523 }
3524 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 3525 SvPVX_const(namesv),
c60dbbc3 3526 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15 3527 &PL_sv_undef, 0);
ecad31f0 3528 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
eed484f9
DD		 3529 SVfARG(errsv
3530 ? errsv
ecad31f0 3531 : newSVpvs_flags("Unknown error\n", SVs_TEMP)));
5a844595 3532 }
9d7f88dd 3533 else {
eed484f9
DD		 3534 if (!*(SvPV_nolen_const(errsv))) {
3535 sv_setpvs(errsv, "Compilation error");
9d7f88dd
SR		 3536 }
3537 }
2bf54cc6 3538 if (gimme != G_ARRAY) PUSHs(&PL_sv_undef);
410be5db
DM		 3539 PUTBACK;
3540 return FALSE;
a0d0e21e 3541 }
104a8185
DM		 3542 else
3543 LEAVE_with_name("evalcomp");
3544
57843af0 3545 CopLINE_set(&PL_compiling, 0);
104a8185 3546 SAVEFREEOP(PL_eval_root);
8be227ab 3547 cv_forget_slab(evalcv);
0c58d367 3548
a0d0e21e
LW		 3549 DEBUG_x(dump_eval());
3550
55497cff 3551 /* Register with debugger: */
26c9400e 3552 if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) {
b96d8cd9 3553 CV * const cv = get_cvs("DB::postponed", 0);
55497cff 3554 if (cv) {
3555 dSP;
924508f0 3556 PUSHMARK(SP);
ad64d0ec 3557 XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling)));
55497cff 3558 PUTBACK;
ad64d0ec 3559 call_sv(MUTABLE_SV(cv), G_DISCARD);
55497cff 3560 }
3561 }
3562
8ed49485
FC		 3563 if (PL_unitcheckav) {
3564 OP *es = PL_eval_start;
3c10abe3 3565 call_list(PL_scopestack_ix, PL_unitcheckav);
8ed49485
FC		 3566 PL_eval_start = es;
3567 }
3c10abe3 3568
a0d0e21e
LW		 3569 /* compiled okay, so do it */
3570
676a678a 3571 CvDEPTH(evalcv) = 1;
3280af22 3572 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3573 PL_op = saveop; /* The caller may need it. */
bc177e6b 3574 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3575
410be5db
DM		 3576 PUTBACK;
3577 return TRUE;
a0d0e21e
LW		 3578}
3579
a6c40364 3580STATIC PerlIO *
282b29ee 3581S_check_type_and_open(pTHX_ SV *name)
ce8abf5f
SP		 3582{
3583 Stat_t st;
41188aa0 3584 STRLEN len;
d345f487 3585 PerlIO * retio;
41188aa0 3586 const char *p = SvPV_const(name, len);
c8028aa6 3587 int st_rc;
df528165 3588
7918f24d
NC		 3589 PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN;
3590
c8028aa6
TC		 3591 /* checking here captures a reasonable error message when
3592 * PERL_DISABLE_PMC is true, but when PMC checks are enabled, the
3593 * user gets a confusing message about looking for the .pmc file
3594 * rather than for the .pm file.
3595 * This check prevents a \0 in @INC causing problems.
3596 */
41188aa0 3597 if (!IS_SAFE_PATHNAME(p, len, "require"))
c8028aa6
TC		 3598 return NULL;
3599
d345f487
DD		 3600 /* on Win32 stat is expensive (it does an open() and close() twice and
3601 a couple other IO calls), the open will fail with a dir on its own with
3602 errno EACCES, so only do a stat to separate a dir from a real EACCES
3603 caused by user perms */
3604#ifndef WIN32
b2da7ead
DM		 3605 /* we use the value of errno later to see how stat() or open() failed.
3606 * We don't want it set if the stat succeeded but we still failed,
3607 * such as if the name exists, but is a directory */
3608 errno = 0;
3609
c8028aa6
TC		 3610 st_rc = PerlLIO_stat(p, &st);
3611
6b845e56 3612 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3613 return NULL;
ce8abf5f 3614 }
d345f487 3615#endif
ce8abf5f 3616
97cb92d6 3617#if !defined(PERLIO_IS_STDIO)
d345f487 3618 retio = PerlIO_openn(aTHX_ ":", PERL_SCRIPT_MODE, -1, 0, 0, NULL, 1, &name);
ccb84406 3619#else
d345f487
DD		 3620 retio = PerlIO_open(p, PERL_SCRIPT_MODE);
3621#endif
3622#ifdef WIN32
3623 /* EACCES stops the INC search early in pp_require to implement
3624 feature RT #113422 */
3625 if(!retio && errno == EACCES) { /* exists but probably a directory */
3626 int eno;
3627 st_rc = PerlLIO_stat(p, &st);
3628 if (st_rc >= 0) {
3629 if(S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode))
3630 eno = 0;
3631 else
3632 eno = EACCES;
3633 errno = eno;
3634 }
3635 }
ccb84406 3636#endif
d345f487 3637 return retio;
ce8abf5f
SP		 3638}
3639
75c20bac 3640#ifndef PERL_DISABLE_PMC
ce8abf5f 3641STATIC PerlIO *
282b29ee 3642S_doopen_pm(pTHX_ SV *name)
b295d113 3643{
282b29ee
NC		 3644 STRLEN namelen;
3645 const char *p = SvPV_const(name, namelen);
b295d113 3646
7918f24d
NC		 3647 PERL_ARGS_ASSERT_DOOPEN_PM;
3648
c8028aa6
TC		 3649 /* check the name before trying for the .pmc name to avoid the
3650 * warning referring to the .pmc which the user probably doesn't
3651 * know or care about
3652 */
41188aa0 3653 if (!IS_SAFE_PATHNAME(p, namelen, "require"))
c8028aa6
TC		 3654 return NULL;
3655
282b29ee 3656 if (namelen > 3 && memEQs(p + namelen - 3, 3, ".pm")) {
eb70bb4a 3657 SV *const pmcsv = sv_newmortal();
a6c40364 3658 Stat_t pmcstat;
50b8ed39 3659
eb70bb4a 3660 SvSetSV_nosteal(pmcsv,name);
46e2868e 3661 sv_catpvs(pmcsv, "c");
50b8ed39 3662
282b29ee
NC		 3663 if (PerlLIO_stat(SvPV_nolen_const(pmcsv), &pmcstat) >= 0)
3664 return check_type_and_open(pmcsv);
a6c40364 3665 }
282b29ee 3666 return check_type_and_open(name);
75c20bac 3667}
7925835c 3668#else
282b29ee 3669# define doopen_pm(name) check_type_and_open(name)
7925835c 3670#endif /* !PERL_DISABLE_PMC */
b295d113 3671
511712dc 3672/* require doesn't search for absolute names, or when the name is
f6bab5f6 3673 explicitly relative the current directory */
511712dc
TC		 3674PERL_STATIC_INLINE bool
3675S_path_is_searchable(const char *name)
3676{
3677 PERL_ARGS_ASSERT_PATH_IS_SEARCHABLE;
3678
3679 if (PERL_FILE_IS_ABSOLUTE(name)
3680#ifdef WIN32
3681 || (*name == '.' && ((name[1] == '/' ||
3682 (name[1] == '.' && name[2] == '/'))
3683 || (name[1] == '\\' ||
3684 ( name[1] == '.' && name[2] == '\\')))
3685 )
3686#else
3687 || (*name == '.' && (name[1] == '/' ||
3688 (name[1] == '.' && name[2] == '/')))
3689#endif
3690 )
3691 {
3692 return FALSE;
3693 }
3694 else
3695 return TRUE;
3696}
3697
b1c05ba5
DM		 3698
3699/* also used for: pp_dofile() */
3700
a0d0e21e
LW		 3701PP(pp_require)
3702{
20b7effb 3703 dSP;
eb578fdb 3704 PERL_CONTEXT *cx;
a0d0e21e 3705 SV *sv;
5c144d81 3706 const char *name;
6132ea6c 3707 STRLEN len;
4492be7a
JM		 3708 char * unixname;
3709 STRLEN unixlen;
62f5ad7a 3710#ifdef VMS
4492be7a 3711 int vms_unixname = 0;
155f4c25 3712 char *unixdir;
62f5ad7a 3713#endif
c445ea15
AL		 3714 const char *tryname = NULL;
3715 SV *namesv = NULL;
f54cb97a 3716 const I32 gimme = GIMME_V;
bbed91b5 3717 int filter_has_file = 0;
c445ea15 3718 PerlIO *tryrsfp = NULL;
34113e50 3719 SV *filter_cache = NULL;
c445ea15
AL		 3720 SV *filter_state = NULL;
3721 SV *filter_sub = NULL;
3722 SV *hook_sv = NULL;
6ec9efec 3723 OP *op;
83b195e4 3724 int saved_errno;
511712dc 3725 bool path_searchable;
a0d0e21e
LW		 3726
3727 sv = POPs;
672794ca 3728 SvGETMAGIC(sv);
d7aa5382 3729 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d086148c 3730 sv = sv_2mortal(new_version(sv));
88010bae 3731 if (!Perl_sv_derived_from_pvn(aTHX_ PL_patchlevel, STR_WITH_LEN("version"), 0))
ac0e6a2f 3732 upg_version(PL_patchlevel, TRUE);
149c1637 3733 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3734 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3735 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
e753e3b1
FC		 3736 SVfARG(sv_2mortal(vnormal(sv))),
3737 SVfARG(sv_2mortal(vnormal(PL_patchlevel)))
3738 );
468aa647
RGS		 3739 }
3740 else {
d1029faa
JP		 3741 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3742 I32 first = 0;
3743 AV *lav;
3744 SV * const req = SvRV(sv);
85fbaab2 3745 SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE);
d1029faa
JP		 3746
3747 /* get the left hand term */
502c6561 3748 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE)));
d1029faa
JP		 3749
3750 first = SvIV(*av_fetch(lav,0,0));
3751 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
85fbaab2 3752 || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
b9f2b683 3753 || av_tindex(lav) > 1 /* FP with > 3 digits */
d1029faa
JP		 3754 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3755 ) {
3756 DIE(aTHX_ "Perl %"SVf" required--this is only "
9d056fb0
FC		 3757 "%"SVf", stopped",
3758 SVfARG(sv_2mortal(vnormal(req))),
3759 SVfARG(sv_2mortal(vnormal(PL_patchlevel)))
3760 );
d1029faa
JP		 3761 }
3762 else { /* probably 'use 5.10' or 'use 5.8' */
af61dbfd 3763 SV *hintsv;
d1029faa
JP		 3764 I32 second = 0;
3765
b9f2b683 3766 if (av_tindex(lav)>=1)
d1029faa
JP		 3767 second = SvIV(*av_fetch(lav,1,0));
3768
3769 second /= second >= 600 ? 100 : 10;
af61dbfd
NC		 3770 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.0",
3771 (int)first, (int)second);
d1029faa
JP		 3772 upg_version(hintsv, TRUE);
3773
3774 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3775 "--this is only %"SVf", stopped",
1be7d6f3
FC		 3776 SVfARG(sv_2mortal(vnormal(req))),
3777 SVfARG(sv_2mortal(vnormal(sv_2mortal(hintsv)))),
3778 SVfARG(sv_2mortal(vnormal(PL_patchlevel)))
3779 );
d1029faa
JP		 3780 }
3781 }
468aa647 3782 }
d7aa5382 3783
7dfde25d 3784 RETPUSHYES;
a0d0e21e 3785 }
f04d2c34
YO		 3786 if (!SvOK(sv))
3787 DIE(aTHX_ "Missing or undefined argument to require");
672794ca 3788 name = SvPV_nomg_const(sv, len);
6132ea6c 3789 if (!(name && len > 0 && *name))
f04d2c34
YO		 3790 DIE(aTHX_ "Missing or undefined argument to require");
3791
41188aa0 3792 if (!IS_SAFE_PATHNAME(name, len, "require")) {
c8028aa6
TC		 3793 DIE(aTHX_ "Can't locate %s: %s",
3794 pv_escape(newSVpvs_flags("",SVs_TEMP),SvPVX(sv),SvCUR(sv),
3795 SvCUR(sv)*2,NULL, SvUTF8(sv)?PERL_PV_ESCAPE_UNI:0),
3796 Strerror(ENOENT));
3797 }
4633a7c4 3798 TAINT_PROPER("require");
4492be7a 3799
511712dc 3800 path_searchable = path_is_searchable(name);
4492be7a
JM		 3801
3802#ifdef VMS
3803 /* The key in the %ENV hash is in the syntax of file passed as the argument
3804 * usually this is in UNIX format, but sometimes in VMS format, which
3805 * can result in a module being pulled in more than once.
3806 * To prevent this, the key must be stored in UNIX format if the VMS
3807 * name can be translated to UNIX.
3808 */
155f4c25 3809
8de90695
FC		 3810 if ((unixname =
3811 tounixspec(name, SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1)))))
3812 != NULL) {
4492be7a
JM		 3813 unixlen = strlen(unixname);
3814 vms_unixname = 1;
3815 }
3816 else
3817#endif
3818 {
3819 /* if not VMS or VMS name can not be translated to UNIX, pass it
3820 * through.
3821 */
3822 unixname = (char *) name;
3823 unixlen = len;
3824 }
44f8325f 3825 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM		 3826 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3827 unixname, unixlen, 0);
44f8325f
AL		 3828 if ( svp ) {
3829 if (*svp != &PL_sv_undef)
3830 RETPUSHYES;
3831 else
087b5369
RD		 3832 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3833 "Compilation failed in require", unixname);
44f8325f 3834 }
4d8b06f1 3835 }
a0d0e21e 3836
32aeab29
SM		 3837 LOADING_FILE_PROBE(unixname);
3838
a0d0e21e
LW		 3839 /* prepare to compile file */
3840
511712dc 3841 if (!path_searchable) {
282b29ee 3842 /* At this point, name is SvPVX(sv) */
46fc3d4c 3843 tryname = name;
282b29ee 3844 tryrsfp = doopen_pm(sv);
bf4acbe4 3845 }
511712dc 3846 if (!tryrsfp && !(errno == EACCES && !path_searchable)) {
44f8325f 3847 AV * const ar = GvAVn(PL_incgv);
c70927a6 3848 SSize_t i;
748a9306 3849#ifdef VMS
4492be7a 3850 if (vms_unixname)
46fc3d4c 3851#endif
3852 {
9ffd39ab 3853 SV *nsv = sv;
d0328fd7 3854 namesv = newSV_type(SVt_PV);
46fc3d4c 3855 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3856 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3857
6567ce24 3858 SvGETMAGIC(dirsv);
bbed91b5
KF		 3859 if (SvROK(dirsv)) {
3860 int count;
a3b58a99 3861 SV **svp;
bbed91b5
KF		 3862 SV *loader = dirsv;
3863
e14e2dc8 3864 if (SvTYPE(SvRV(loader)) == SVt_PVAV
6567ce24 3865 && !SvOBJECT(SvRV(loader)))
e14e2dc8 3866 {
502c6561 3867 loader = *av_fetch(MUTABLE_AV(SvRV(loader)), 0, TRUE);
6567ce24 3868 SvGETMAGIC(loader);
bbed91b5
KF		 3869 }
3870
b900a521 3871 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3872 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3873 tryname = SvPVX_const(namesv);
c445ea15 3874 tryrsfp = NULL;
bbed91b5 3875
9ffd39ab
FC		 3876 if (SvPADTMP(nsv)) {
3877 nsv = sv_newmortal();
3878 SvSetSV_nosteal(nsv,sv);
3879 }
901ee108
FC		 3880
3881 ENTER_with_name("call_INC");
3882 SAVETMPS;
bbed91b5
KF		 3883 EXTEND(SP, 2);
3884
3885 PUSHMARK(SP);
3886 PUSHs(dirsv);
9ffd39ab 3887 PUSHs(nsv);
bbed91b5 3888 PUTBACK;
6567ce24
FC		 3889 if (SvGMAGICAL(loader)) {
3890 SV *l = sv_newmortal();
3891 sv_setsv_nomg(l, loader);
3892 loader = l;
3893 }
e982885c
NC		 3894 if (sv_isobject(loader))
3895 count = call_method("INC", G_ARRAY);
3896 else
3897 count = call_sv(loader, G_ARRAY);
bbed91b5
KF		 3898 SPAGAIN;
3899
3900 if (count > 0) {
3901 int i = 0;
3902 SV *arg;
3903
3904 SP -= count - 1;
3905 arg = SP[i++];
3906
34113e50
NC		 3907 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3908 && !isGV_with_GP(SvRV(arg))) {
3909 filter_cache = SvRV(arg);
34113e50
NC		 3910
3911 if (i < count) {
3912 arg = SP[i++];
3913 }
3914 }
3915
6e592b3a 3916 if (SvROK(arg) && isGV_with_GP(SvRV(arg))) {
bbed91b5
KF		 3917 arg = SvRV(arg);
3918 }
3919
6e592b3a 3920 if (isGV_with_GP(arg)) {
159b6efe 3921 IO * const io = GvIO((const GV *)arg);
bbed91b5
KF		 3922
3923 ++filter_has_file;
3924
3925 if (io) {
3926 tryrsfp = IoIFP(io);
0f7de14d
NC		 3927 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3928 PerlIO_close(IoOFP(io));
bbed91b5 3929 }
0f7de14d
NC		 3930 IoIFP(io) = NULL;
3931 IoOFP(io) = NULL;
bbed91b5
KF		 3932 }
3933
3934 if (i < count) {
3935 arg = SP[i++];
3936 }
3937 }
3938
3939 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3940 filter_sub = arg;
74c765eb 3941 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF		 3942
3943 if (i < count) {
3944 filter_state = SP[i];
b37c2d43 3945 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3946 }
34113e50 3947 }
bbed91b5 3948
34113e50
NC		 3949 if (!tryrsfp && (filter_cache || filter_sub)) {
3950 tryrsfp = PerlIO_open(BIT_BUCKET,
3951 PERL_SCRIPT_MODE);
bbed91b5 3952 }
1d06aecd 3953 SP--;
bbed91b5
KF		 3954 }
3955
c39fcc09
FC		 3956 /* FREETMPS may free our filter_cache */
3957 SvREFCNT_inc_simple_void(filter_cache);
3958
bbed91b5
KF		 3959 PUTBACK;
3960 FREETMPS;
d343c3ef 3961 LEAVE_with_name("call_INC");
bbed91b5 3962
c39fcc09
FC		 3963 /* Now re-mortalize it. */
3964 sv_2mortal(filter_cache);
3965
c5f55552
NC		 3966 /* Adjust file name if the hook has set an %INC entry.
3967 This needs to happen after the FREETMPS above. */
3968 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3969 if (svp)
3970 tryname = SvPV_nolen_const(*svp);
3971
bbed91b5 3972 if (tryrsfp) {
89ccab8c 3973 hook_sv = dirsv;
bbed91b5
KF		 3974 break;
3975 }
3976
3977 filter_has_file = 0;
9b7d7782 3978 filter_cache = NULL;
bbed91b5 3979 if (filter_state) {
762333d9 3980 SvREFCNT_dec_NN(filter_state);
c445ea15 3981 filter_state = NULL;
bbed91b5
KF		 3982 }
3983 if (filter_sub) {
762333d9 3984 SvREFCNT_dec_NN(filter_sub);
c445ea15 3985 filter_sub = NULL;
bbed91b5
KF		 3986 }
3987 }
3988 else {
511712dc 3989 if (path_searchable) {
b640a14a
NC		 3990 const char *dir;
3991 STRLEN dirlen;
3992
3993 if (SvOK(dirsv)) {
6567ce24 3994 dir = SvPV_nomg_const(dirsv, dirlen);
b640a14a
NC		 3995 } else {
3996 dir = "";
3997 dirlen = 0;
3998 }
3999
ddc65b67
CB		 4000 if (!IS_SAFE_SYSCALL(dir, dirlen, "@INC entry", "require"))
4001 continue;
e37778c2 4002#ifdef VMS
8de90695
FC		 4003 if ((unixdir =
4004 tounixpath(dir, SvPVX(sv_2mortal(newSVpv("", VMS_MAXRSS-1)))))
4005 == NULL)
bbed91b5
KF		 4006 continue;
4007 sv_setpv(namesv, unixdir);
4008 sv_catpv(namesv, unixname);
e37778c2
NC		 4009#else
4010# ifdef __SYMBIAN32__
27da23d5
JH		 4011 if (PL_origfilename[0] &&
4012 PL_origfilename[1] == ':' &&
4013 !(dir[0] && dir[1] == ':'))
4014 Perl_sv_setpvf(aTHX_ namesv,
4015 "%c:%s\\%s",
4016 PL_origfilename[0],
4017 dir, name);
4018 else
4019 Perl_sv_setpvf(aTHX_ namesv,
4020 "%s\\%s",
4021 dir, name);
e37778c2 4022# else
b640a14a
NC		 4023 /* The equivalent of
4024 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
4025 but without the need to parse the format string, or
4026 call strlen on either pointer, and with the correct
4027 allocation up front. */
4028 {
4029 char *tmp = SvGROW(namesv, dirlen + len + 2);
4030
4031 memcpy(tmp, dir, dirlen);
4032 tmp +=dirlen;
6b0bdd7f
MH		 4033
4034 /* Avoid '<dir>//<file>' */
4035 if (!dirlen || *(tmp-1) != '/') {
4036 *tmp++ = '/';
9fdd5a7a
MH		 4037 } else {
4038 /* So SvCUR_set reports the correct length below */
4039 dirlen--;
6b0bdd7f
MH		 4040 }
4041
b640a14a
NC		 4042 /* name came from an SV, so it will have a '\0' at the
4043 end that we can copy as part of this memcpy(). */
4044 memcpy(tmp, name, len + 1);
4045
4046 SvCUR_set(namesv, dirlen + len + 1);
282b29ee 4047 SvPOK_on(namesv);
b640a14a 4048 }
27da23d5 4049# endif
bf4acbe4 4050#endif
bbed91b5 4051 TAINT_PROPER("require");
349d4f2f 4052 tryname = SvPVX_const(namesv);
282b29ee 4053 tryrsfp = doopen_pm(namesv);
bbed91b5 4054 if (tryrsfp) {
e63be746
RGS		 4055 if (tryname[0] == '.' && tryname[1] == '/') {
4056 ++tryname;
4910606a 4057 while (*++tryname == '/') {}
e63be746 4058 }
bbed91b5
KF		 4059 break;
4060 }
2433d39e
BF		 4061 else if (errno == EMFILE || errno == EACCES) {
4062 /* no point in trying other paths if out of handles;
4063 * on the other hand, if we couldn't open one of the
4064 * files, then going on with the search could lead to
4065 * unexpected results; see perl #113422
4066 */
4067 break;
4068 }
be4b629d 4069 }
46fc3d4c 4070 }
a0d0e21e
LW		 4071 }
4072 }
4073 }
83b195e4 4074 saved_errno = errno; /* sv_2mortal can realloc things */
b2ef6d44 4075 sv_2mortal(namesv);
a0d0e21e 4076 if (!tryrsfp) {
533c011a 4077 if (PL_op->op_type == OP_REQUIRE) {
83b195e4 4078 if(saved_errno == EMFILE || saved_errno == EACCES) {
c9d5e35e 4079 /* diag_listed_as: Can't locate %s */
e2ce0950
P		 4080 DIE(aTHX_ "Can't locate %s: %s: %s",
4081 name, tryname, Strerror(saved_errno));
e31de809
SP		 4082 } else {
4083 if (namesv) { /* did we lookup @INC? */
44f8325f 4084 AV * const ar = GvAVn(PL_incgv);
c70927a6 4085 SSize_t i;
1e5f02b3 4086 SV *const msg = newSVpvs_flags("", SVs_TEMP);
c9d5e35e
NC		 4087 SV *const inc = newSVpvs_flags("", SVs_TEMP);
4088 for (i = 0; i <= AvFILL(ar); i++) {
4089 sv_catpvs(inc, " ");
4090 sv_catsv(inc, *av_fetch(ar, i, TRUE));
4091 }
f7ee53b5
PJ		 4092 if (len >= 4 && memEQ(name + len - 3, ".pm", 4)) {
4093 const char *c, *e = name + len - 3;
4094 sv_catpv(msg, " (you may need to install the ");
4095 for (c = name; c < e; c++) {
4096 if (*c == '/') {
46e2868e 4097 sv_catpvs(msg, "::");
f7ee53b5
PJ		 4098 }
4099 else {
4100 sv_catpvn(msg, c, 1);
4101 }
4102 }
4103 sv_catpv(msg, " module)");
4104 }
4105 else if (len >= 2 && memEQ(name + len - 2, ".h", 3)) {
4106 sv_catpv(msg, " (change .h to .ph maybe?) (did you run h2ph?)");
4107 }
4108 else if (len >= 3 && memEQ(name + len - 3, ".ph", 4)) {
4109 sv_catpv(msg, " (did you run h2ph?)");
4110 }
c9d5e35e
NC		 4111
4112 /* diag_listed_as: Can't locate %s */
4113 DIE(aTHX_
f7ee53b5
PJ		 4114 "Can't locate %s in @INC%" SVf " (@INC contains:%" SVf ")",
4115 name, msg, inc);
c9d5e35e 4116 }
2683423c 4117 }
c9d5e35e 4118 DIE(aTHX_ "Can't locate %s", name);
a0d0e21e
LW		 4119 }
4120
a3ff80c1 4121 CLEAR_ERRSV();
a0d0e21e
LW		 4122 RETPUSHUNDEF;
4123 }
d8bfb8bd 4124 else
93189314 4125 SETERRNO(0, SS_NORMAL);
a0d0e21e
LW		 4126
4127 /* Assume success here to prevent recursive requirement. */
238d24b4 4128 /* name is never assigned to again, so len is still strlen(name) */
d3a4e64e 4129 /* Check whether a hook in @INC has already filled %INC */
44f8325f 4130 if (!hook_sv) {
4492be7a 4131 (void)hv_store(GvHVn(PL_incgv),
b2ef6d44 4132 unixname, unixlen, newSVpv(tryname,0),0);
44f8325f 4133 } else {
4492be7a 4134 SV** const svp = hv_fetch(GvHVn(PL_incgv), unixname, unixlen, 0);
44f8325f 4135 if (!svp)
4492be7a
JM		 4136 (void)hv_store(GvHVn(PL_incgv),
4137 unixname, unixlen, SvREFCNT_inc_simple(hook_sv), 0 );
d3a4e64e 4138 }
a0d0e21e 4139
d343c3ef 4140 ENTER_with_name("eval");
a0d0e21e 4141 SAVETMPS;
b2ef6d44
FC		 4142 SAVECOPFILE_FREE(&PL_compiling);
4143 CopFILE_set(&PL_compiling, tryname);
8eaa0acf 4144 lex_start(NULL, tryrsfp, 0);
e50aee73 4145
34113e50 4146 if (filter_sub || filter_cache) {
4464f08e
NC		 4147 /* We can use the SvPV of the filter PVIO itself as our cache, rather
4148 than hanging another SV from it. In turn, filter_add() optionally
4149 takes the SV to use as the filter (or creates a new SV if passed
4150 NULL), so simply pass in whatever value filter_cache has. */
9b7d7782
FC		 4151 SV * const fc = filter_cache ? newSV(0) : NULL;
4152 SV *datasv;
4153 if (fc) sv_copypv(fc, filter_cache);
4154 datasv = filter_add(S_run_user_filter, fc);
bbed91b5 4155 IoLINES(datasv) = filter_has_file;
159b6efe
NC		 4156 IoTOP_GV(datasv) = MUTABLE_GV(filter_state);
4157 IoBOTTOM_GV(datasv) = MUTABLE_GV(filter_sub);
bbed91b5
KF		 4158 }
4159
4160 /* switch to eval mode */
a0d0e21e 4161 PUSHBLOCK(cx, CXt_EVAL, SP);
6b75f042 4162 PUSHEVAL(cx, name);
f39bc417 4163 cx->blk_eval.retop = PL_op->op_next;
a0d0e21e 4164
57843af0
GS		 4165 SAVECOPLINE(&PL_compiling);
4166 CopLINE_set(&PL_compiling, 0);
a0d0e21e
LW		 4167
4168 PUTBACK;
6ec9efec 4169
104a8185 4170 if (doeval(gimme, NULL, PL_curcop->cop_seq, NULL))
410be5db
DM		 4171 op = DOCATCH(PL_eval_start);
4172 else
4173 op = PL_op->op_next;
bfed75c6 4174
32aeab29
SM		 4175 LOADED_FILE_PROBE(unixname);
4176
6ec9efec 4177 return op;
a0d0e21e
LW		 4178}
4179
996c9baa
VP		 4180/* This is a op added to hold the hints hash for
4181 pp_entereval. The hash can be modified by the code
4182 being eval'ed, so we return a copy instead. */
4183
4184PP(pp_hintseval)
4185{
996c9baa 4186 dSP;
defdfed5 4187 mXPUSHs(MUTABLE_SV(hv_copy_hints_hv(MUTABLE_HV(cSVOP_sv))));
996c9baa
VP		 4188 RETURN;
4189}
4190
4191
a0d0e21e
LW		 4192PP(pp_entereval)
4193{
20b7effb 4194 dSP;
eb578fdb 4195 PERL_CONTEXT *cx;
0d863452 4196 SV *sv;
890ce7af 4197 const I32 gimme = GIMME_V;
fd06b02c 4198 const U32 was = PL_breakable_sub_gen;
83ee9e09 4199 char tbuf[TYPE_DIGITS(long) + 12];
78da7625 4200 bool saved_delete = FALSE;
83ee9e09 4201 char *tmpbuf = tbuf;
a0d0e21e 4202 STRLEN len;
a3985cdc 4203 CV* runcv;
0abcdfa4 4204 U32 seq, lex_flags = 0;
c445ea15 4205 HV *saved_hh = NULL;
60d63348 4206 const bool bytes = PL_op->op_private & OPpEVAL_BYTES;
e389bba9 4207
0d863452 4208 if (PL_op->op_private & OPpEVAL_HAS_HH) {
85fbaab2 4209 saved_hh = MUTABLE_HV(SvREFCNT_inc(POPs));
0d863452 4210 }
bc344123
FC		 4211 else if (PL_hints & HINT_LOCALIZE_HH || (
4212 PL_op->op_private & OPpEVAL_COPHH
4213 && PL_curcop->cop_hints & HINT_LOCALIZE_HH
4214 )) {
7d789282
FC		 4215 saved_hh = cop_hints_2hv(PL_curcop, 0);
4216 hv_magic(saved_hh, NULL, PERL_MAGIC_hints);
4217 }
0d863452 4218 sv = POPs;
895b760f
DM		 4219 if (!SvPOK(sv)) {
4220 /* make sure we've got a plain PV (no overload etc) before testing
4221 * for taint. Making a copy here is probably overkill, but better
4222 * safe than sorry */
0479a84a
NC		 4223 STRLEN len;
4224 const char * const p = SvPV_const(sv, len);
4225
4226 sv = newSVpvn_flags(p, len, SVs_TEMP | SvUTF8(sv));
0abcdfa4 4227 lex_flags |= LEX_START_COPIED;
7d789282 4228
60d63348 4229 if (bytes && SvUTF8(sv))
7d789282
FC		 4230 SvPVbyte_force(sv, len);
4231 }
60d63348 4232 else if (bytes && SvUTF8(sv)) {
e1fa07e3 4233 /* Don't modify someone else's scalar */
7d789282
FC		 4234 STRLEN len;
4235 sv = newSVsv(sv);
5cefc8c1 4236 (void)sv_2mortal(sv);
7d789282 4237 SvPVbyte_force(sv,len);
0abcdfa4 4238 lex_flags |= LEX_START_COPIED;
895b760f 4239 }
a0d0e21e 4240
af2d3def 4241 TAINT_IF(SvTAINTED(sv));
748a9306 4242 TAINT_PROPER("eval");
a0d0e21e 4243
d343c3ef 4244 ENTER_with_name("eval");
0abcdfa4 4245 lex_start(sv, NULL, lex_flags | (PL_op->op_private & OPpEVAL_UNICODE
60d63348
FC		 4246 ? LEX_IGNORE_UTF8_HINTS
4247 : bytes ? LEX_EVALBYTES : LEX_START_SAME_FILTER
0abcdfa4 4248 )
60d63348 4249 );
748a9306 4250 SAVETMPS;
ac27b0f5 4251
a0d0e21e
LW		 4252 /* switch to eval mode */
4253
83ee9e09 4254 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
8b38226b
AL		 4255 SV * const temp_sv = sv_newmortal();
4256 Perl_sv_setpvf(aTHX_ temp_sv, "_<(eval %lu)[%s:%"IVdf"]",
83ee9e09
GS		 4257 (unsigned long)++PL_evalseq,
4258 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
8b38226b
AL		 4259 tmpbuf = SvPVX(temp_sv);
4260 len = SvCUR(temp_sv);
83ee9e09
GS		 4261 }
4262 else
d9fad198 4263 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(eval %lu)", (unsigned long)++PL_evalseq);
f4dd75d9 4264 SAVECOPFILE_FREE(&PL_compiling);
57843af0 4265 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 4266 SAVECOPLINE(&PL_compiling);
57843af0 4267 CopLINE_set(&PL_compiling, 1);
d819b83a
DM		 4268 /* special case: an eval '' executed within the DB package gets lexically
4269 * placed in the first non-DB CV rather than the current CV - this
4270 * allows the debugger to execute code, find lexicals etc, in the
4271 * scope of the code being debugged. Passing &seq gets find_runcv
4272 * to do the dirty work for us */
4273 runcv = find_runcv(&seq);
a0d0e21e 4274
6b35e009 4275 PUSHBLOCK(cx, (CXt_EVAL|CXp_REAL), SP);
6b75f042 4276 PUSHEVAL(cx, 0);
f39bc417 4277 cx->blk_eval.retop = PL_op->op_next;
a0d0e21e
LW		 4278
4279 /* prepare to compile string */
4280
a44e3ce2 4281 if ((PERLDB_LINE || PERLDB_SAVESRC) && PL_curstash != PL_debstash)
bdc0bf6f 4282 save_lines(CopFILEAV(&PL_compiling), PL_parser->linestr);
78da7625 4283 else {
c8cb8d55
FC		 4284 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
4285 deleting the eval's FILEGV from the stash before gv_check() runs
4286 (i.e. before run-time proper). To work around the coredump that
4287 ensues, we always turn GvMULTI_on for any globals that were
4288 introduced within evals. See force_ident(). GSAR 96-10-12 */
78da7625
FC		 4289 char *const safestr = savepvn(tmpbuf, len);
4290 SAVEDELETE(PL_defstash, safestr, len);
4291 saved_delete = TRUE;
4292 }
4293
a0d0e21e 4294 PUTBACK;
f9bddea7 4295
104a8185 4296 if (doeval(gimme, runcv, seq, saved_hh)) {
f9bddea7
NC		 4297 if (was != PL_breakable_sub_gen /* Some subs defined here. */
4298 ? (PERLDB_LINE || PERLDB_SAVESRC)
4299 : PERLDB_SAVESRC_NOSUBS) {
4300 /* Retain the filegv we created. */
78da7625 4301 } else if (!saved_delete) {
f9bddea7
NC		 4302 char *const safestr = savepvn(tmpbuf, len);
4303 SAVEDELETE(PL_defstash, safestr, len);
4304 }
4305 return DOCATCH(PL_eval_start);
4306 } else {
486ec47a 4307 /* We have already left the scope set up earlier thanks to the LEAVE
f9bddea7 4308 in doeval(). */
eb044b10
NC		 4309 if (was != PL_breakable_sub_gen /* Some subs defined here. */
4310 ? (PERLDB_LINE || PERLDB_SAVESRC)
4311 : PERLDB_SAVESRC_INVALID) {
f9bddea7 4312 /* Retain the filegv we created. */
7857f360 4313 } else if (!saved_delete) {
f9bddea7
NC		 4314 (void)hv_delete(PL_defstash, tmpbuf, len, G_DISCARD);
4315 }
4316 return PL_op->op_next;
4317 }
a0d0e21e
LW		 4318}
4319
4320PP(pp_leaveeval)
4321{
20b7effb 4322 dSP;
a0d0e21e
LW		 4323 SV **newsp;
4324 PMOP *newpm;
4325 I32 gimme;
eb578fdb 4326 PERL_CONTEXT *cx;
a0d0e21e 4327 OP *retop;
06b5626a 4328 const U8 save_flags = PL_op -> op_flags;
a0d0e21e 4329 I32 optype;
b6494f15 4330 SV *namesv;
676a678a 4331 CV *evalcv;
a0d0e21e 4332
011c3814 4333 PERL_ASYNC_CHECK();
a0d0e21e
LW		 4334 POPBLOCK(cx,newpm);
4335 POPEVAL(cx);
b6494f15 4336 namesv = cx->blk_eval.old_namesv;
f39bc417 4337 retop = cx->blk_eval.retop;
676a678a 4338 evalcv = cx->blk_eval.cv;
a0d0e21e 4339
2fc507dc 4340 SP = leave_common((gimme == G_VOID) ? SP : newsp, SP, newsp,
2ec7f6f2 4341 gimme, SVs_TEMP, FALSE);
3280af22 4342 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e 4343
4fdae800 4344#ifdef DEBUGGING
676a678a 4345 assert(CvDEPTH(evalcv) == 1);
4fdae800 4346#endif
676a678a 4347 CvDEPTH(evalcv) = 0;
4fdae800 4348
1ce6579f 4349 if (optype == OP_REQUIRE &&
924508f0 4350 !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp))
54310121 4351 {
1ce6579f 4352 /* Unassume the success we assumed earlier. */
b6494f15 4353 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 4354 SvPVX_const(namesv),
c60dbbc3 4355 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15 4356 G_DISCARD);
81d52ecd 4357 Perl_die(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
a25b5927 4358 NOT_REACHED; /* NOTREACHED */
c5df3096 4359 /* die_unwind() did LEAVE, or we won't be here */
f46d017c
GS		 4360 }
4361 else {
d343c3ef 4362 LEAVE_with_name("eval");
8433848b 4363 if (!(save_flags & OPf_SPECIAL)) {
ab69dbc2 4364 CLEAR_ERRSV();
8433848b 4365 }
a0d0e21e 4366 }
a0d0e21e
LW		 4367
4368 RETURNOP(retop);
4369}
4370
edb2152a
NC		 4371/* Common code for Perl_call_sv and Perl_fold_constants, put here to keep it
4372 close to the related Perl_create_eval_scope. */
4373void
4374Perl_delete_eval_scope(pTHX)
a0d0e21e 4375{
edb2152a
NC		 4376 SV **newsp;
4377 PMOP *newpm;
4378 I32 gimme;
eb578fdb 4379 PERL_CONTEXT *cx;
edb2152a
NC		 4380 I32 optype;
4381
4382 POPBLOCK(cx,newpm);
4383 POPEVAL(cx);
4384 PL_curpm = newpm;
d343c3ef 4385 LEAVE_with_name("eval_scope");
edb2152a
NC		 4386 PERL_UNUSED_VAR(newsp);
4387 PERL_UNUSED_VAR(gimme);
4388 PERL_UNUSED_VAR(optype);
4389}
a0d0e21e 4390
edb2152a
NC		 4391/* Common-ish code salvaged from Perl_call_sv and pp_entertry, because it was
4392 also needed by Perl_fold_constants. */
4393PERL_CONTEXT *
4394Perl_create_eval_scope(pTHX_ U32 flags)
4395{
4396 PERL_CONTEXT *cx;
4397 const I32 gimme = GIMME_V;
4398
d343c3ef 4399 ENTER_with_name("eval_scope");
a0d0e21e
LW		 4400 SAVETMPS;
4401
edb2152a 4402 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
6b75f042 4403 PUSHEVAL(cx, 0);
a0d0e21e 4404
faef0170 4405 PL_in_eval = EVAL_INEVAL;
edb2152a
NC		 4406 if (flags & G_KEEPERR)
4407 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS		 4408 else
4409 CLEAR_ERRSV();
edb2152a
NC		 4410 if (flags & G_FAKINGEVAL) {
4411 PL_eval_root = PL_op; /* Only needed so that goto works right. */
4412 }
4413 return cx;
4414}
4415
4416PP(pp_entertry)
4417{
df528165 4418 PERL_CONTEXT * const cx = create_eval_scope(0);
edb2152a 4419 cx->blk_eval.retop = cLOGOP->op_other->op_next;
533c011a 4420 return DOCATCH(PL_op->op_next);
a0d0e21e
LW		 4421}
4422
4423PP(pp_leavetry)
4424{
20b7effb 4425 dSP;
a0d0e21e
LW		 4426 SV **newsp;
4427 PMOP *newpm;
4428 I32 gimme;
eb578fdb 4429 PERL_CONTEXT *cx;
a0d0e21e
LW		 4430 I32 optype;
4431
011c3814 4432 PERL_ASYNC_CHECK();
a0d0e21e
LW		 4433 POPBLOCK(cx,newpm);
4434 POPEVAL(cx);
9d4ba2ae 4435 PERL_UNUSED_VAR(optype);
a0d0e21e 4436
2fc507dc 4437 SP = leave_common(newsp, SP, newsp, gimme,
2ec7f6f2 4438 SVs_PADTMP|SVs_TEMP, FALSE);
3280af22 4439 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e 4440
d343c3ef 4441 LEAVE_with_name("eval_scope");
ab69dbc2 4442 CLEAR_ERRSV();
745cf2ff 4443 RETURN;
a0d0e21e
LW		 4444}
4445
0d863452
RH		 4446PP(pp_entergiven)
4447{
20b7effb 4448 dSP;
eb578fdb 4449 PERL_CONTEXT *cx;
0d863452
RH		 4450 const I32 gimme = GIMME_V;
4451
d343c3ef 4452 ENTER_with_name("given");
0d863452
RH		 4453 SAVETMPS;
4454
b5a64814
FC		 4455 if (PL_op->op_targ) {
4456 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
4457 SvREFCNT_dec(PAD_SVl(PL_op->op_targ));
4458 PAD_SVl(PL_op->op_targ) = SvREFCNT_inc_NN(POPs);
4459 }
4460 else {
4461 SAVE_DEFSV;
4462 DEFSV_set(POPs);
4463 }
0d863452
RH		 4464
4465 PUSHBLOCK(cx, CXt_GIVEN, SP);
4466 PUSHGIVEN(cx);
4467
4468 RETURN;
4469}
4470
4471PP(pp_leavegiven)
4472{
20b7effb 4473 dSP;
eb578fdb 4474 PERL_CONTEXT *cx;
0d863452
RH		 4475 I32 gimme;
4476 SV **newsp;
4477 PMOP *newpm;
96a5add6 4478 PERL_UNUSED_CONTEXT;
0d863452
RH		 4479
4480 POPBLOCK(cx,newpm);
4481 assert(CxTYPE(cx) == CXt_GIVEN);
0d863452 4482
2fc507dc 4483 SP = leave_common(newsp, SP, newsp, gimme,
2ec7f6f2 4484 SVs_PADTMP|SVs_TEMP, FALSE);
25b991bf 4485 PL_curpm = newpm; /* Don't pop $1 et al till now */
0d863452 4486
d343c3ef 4487 LEAVE_with_name("given");
25b991bf 4488 RETURN;
0d863452
RH		 4489}
4490
4491/* Helper routines used by pp_smartmatch */
4136a0f7 4492STATIC PMOP *
84679df5 4493S_make_matcher(pTHX_ REGEXP *re)
0d863452
RH		 4494{
4495 PMOP *matcher = (PMOP *) newPMOP(OP_MATCH, OPf_WANT_SCALAR | OPf_STACKED);
7918f24d
NC		 4496
4497 PERL_ARGS_ASSERT_MAKE_MATCHER;
4498
d6106309 4499 PM_SETRE(matcher, ReREFCNT_inc(re));
7918f24d 4500
0d863452 4501 SAVEFREEOP((OP *) matcher);
d343c3ef 4502 ENTER_with_name("matcher"); SAVETMPS;
0d863452
RH		 4503 SAVEOP();
4504 return matcher;
4505}
4506
4136a0f7 4507STATIC bool
0d863452
RH		 4508S_matcher_matches_sv(pTHX_ PMOP *matcher, SV *sv)
4509{
4510 dSP;
7918f24d
NC		 4511
4512 PERL_ARGS_ASSERT_MATCHER_MATCHES_SV;
0d863452
RH		 4513
4514 PL_op = (OP *) matcher;
4515 XPUSHs(sv);
4516 PUTBACK;
897d3989 4517 (void) Perl_pp_match(aTHX);
0d863452
RH		 4518 SPAGAIN;
4519 return (SvTRUEx(POPs));
4520}
4521
4136a0f7 4522STATIC void
0d863452
RH		 4523S_destroy_matcher(pTHX_ PMOP *matcher)
4524{
7918f24d 4525 PERL_ARGS_ASSERT_DESTROY_MATCHER;
0d863452 4526 PERL_UNUSED_ARG(matcher);
7918f24d 4527
0d863452 4528 FREETMPS;
d343c3ef 4529 LEAVE_with_name("matcher");
0d863452
RH		 4530}
4531
4532/* Do a smart match */
4533PP(pp_smartmatch)
4534{
d7c0d282 4535 DEBUG_M(Perl_deb(aTHX_ "Starting smart match resolution\n"));
be88a5c3 4536 return do_smartmatch(NULL, NULL, 0);
0d863452
RH		 4537}
4538
4b021f5f
RGS		 4539/* This version of do_smartmatch() implements the
4540 * table of smart matches that is found in perlsyn.
0d863452 4541 */
4136a0f7 4542STATIC OP *
be88a5c3 4543S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
0d863452
RH		 4544{
4545 dSP;
4546
41e726ac 4547 bool object_on_left = FALSE;
0d863452
RH		 4548 SV *e = TOPs; /* e is for 'expression' */
4549 SV *d = TOPm1s; /* d is for 'default', as in PL_defgv */
a566f585 4550
6f1401dc
DM		 4551 /* Take care only to invoke mg_get() once for each argument.
4552 * Currently we do this by copying the SV if it's magical. */
4553 if (d) {
be88a5c3 4554 if (!copied && SvGMAGICAL(d))
6f1401dc
DM		 4555 d = sv_mortalcopy(d);
4556 }
4557 else
4558 d = &PL_sv_undef;
4559
4560 assert(e);
4561 if (SvGMAGICAL(e))
4562 e = sv_mortalcopy(e);
4563
2c9d2554 4564 /* First of all, handle overload magic of the rightmost argument */
6d743019 4565 if (SvAMAGIC(e)) {
d7c0d282
DM		 4566 SV * tmpsv;
4567 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Object\n"));
4568 DEBUG_M(Perl_deb(aTHX_ " attempting overload\n"));
4569
b900a653 4570 tmpsv = amagic_call(d, e, smart_amg, AMGf_noleft);
7c41e62e
RGS		 4571 if (tmpsv) {
4572 SPAGAIN;
4573 (void)POPs;
4574 SETs(tmpsv);
4575 RETURN;
4576 }
d7c0d282 4577 DEBUG_M(Perl_deb(aTHX_ " failed to run overload method; continuing...\n"));
7c41e62e 4578 }
62ec5f58 4579
0d863452
RH		 4580 SP -= 2; /* Pop the values */
4581
0d863452 4582
b0138e99 4583 /* ~~ undef */
62ec5f58 4584 if (!SvOK(e)) {
d7c0d282 4585 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-undef\n"));
62ec5f58 4586 if (SvOK(d))
33570f8b
RGS		 4587 RETPUSHNO;
4588 else
62ec5f58 4589 RETPUSHYES;
33570f8b 4590 }
e67b97bd 4591
d7c0d282
DM		 4592 if (sv_isobject(e) && (SvTYPE(SvRV(e)) != SVt_REGEXP)) {
4593 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Object\n"));
62ec5f58 4594 Perl_croak(aTHX_ "Smart matching a non-overloaded object breaks encapsulation");
d7c0d282 4595 }
41e726ac
RGS		 4596 if (sv_isobject(d) && (SvTYPE(SvRV(d)) != SVt_REGEXP))
4597 object_on_left = TRUE;
62ec5f58 4598
b0138e99 4599 /* ~~ sub */
a4a197da 4600 if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVCV) {
0d863452 4601 I32 c;
41e726ac
RGS		 4602 if (object_on_left) {
4603 goto sm_any_sub; /* Treat objects like scalars */
4604 }
4605 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) {
a4a197da
RGS		 4606 /* Test sub truth for each key */
4607 HE *he;
4608 bool andedresults = TRUE;
4609 HV *hv = (HV*) SvRV(d);
168ff818 4610 I32 numkeys = hv_iterinit(hv);
d7c0d282 4611 DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-CodeRef\n"));
168ff818 4612 if (numkeys == 0)
07edf497 4613 RETPUSHYES;
a4a197da 4614 while ( (he = hv_iternext(hv)) ) {
d7c0d282 4615 DEBUG_M(Perl_deb(aTHX_ " testing hash key...\n"));
d343c3ef 4616 ENTER_with_name("smartmatch_hash_key_test");
a4a197da
RGS		 4617 SAVETMPS;
4618 PUSHMARK(SP);
4619 PUSHs(hv_iterkeysv(he));
4620 PUTBACK;
4621 c = call_sv(e, G_SCALAR);
4622 SPAGAIN;
4623 if (c == 0)
4624 andedresults = FALSE;
4625 else
4626 andedresults = SvTRUEx(POPs) && andedresults;
4627 FREETMPS;
d343c3ef 4628 LEAVE_with_name("smartmatch_hash_key_test");
a4a197da
RGS		 4629 }
4630 if (andedresults)
4631 RETPUSHYES;
4632 else
4633 RETPUSHNO;
4634 }
4635 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
4636 /* Test sub truth for each element */
c70927a6 4637 SSize_t i;
a4a197da
RGS		 4638 bool andedresults = TRUE;
4639 AV *av = (AV*) SvRV(d);
b9f2b683 4640 const I32 len = av_tindex(av);
d7c0d282 4641 DEBUG_M(Perl_deb(aTHX_ " applying rule Array-CodeRef\n"));
168ff818 4642 if (len == -1)
07edf497 4643 RETPUSHYES;
a4a197da
RGS		 4644 for (i = 0; i <= len; ++i) {
4645 SV * const * const svp = av_fetch(av, i, FALSE);
d7c0d282 4646 DEBUG_M(Perl_deb(aTHX_ " testing array element...\n"));
d343c3ef 4647 ENTER_with_name("smartmatch_array_elem_test");
a4a197da
RGS		 4648 SAVETMPS;
4649 PUSHMARK(SP);
4650 if (svp)
4651 PUSHs(*svp);
4652 PUTBACK;
4653 c = call_sv(e, G_SCALAR);
4654 SPAGAIN;
4655 if (c == 0)
4656 andedresults = FALSE;
4657 else
4658 andedresults = SvTRUEx(POPs) && andedresults;
4659 FREETMPS;
d343c3ef 4660 LEAVE_with_name("smartmatch_array_elem_test");
a4a197da
RGS		 4661 }
4662 if (andedresults)
4663 RETPUSHYES;
4664 else
4665 RETPUSHNO;
4666 }
4667 else {
41e726ac 4668 sm_any_sub:
d7c0d282 4669 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-CodeRef\n"));
d343c3ef 4670 ENTER_with_name("smartmatch_coderef");
a4a197da
RGS		 4671 SAVETMPS;
4672 PUSHMARK(SP);
4673 PUSHs(d);
4674 PUTBACK;
4675 c = call_sv(e, G_SCALAR);
4676 SPAGAIN;
4677 if (c == 0)
4678 PUSHs(&PL_sv_no);
4679 else if (SvTEMP(TOPs))
4680 SvREFCNT_inc_void(TOPs);
4681 FREETMPS;
d343c3ef 4682 LEAVE_with_name("smartmatch_coderef");
a4a197da
RGS		 4683 RETURN;
4684 }
0d863452 4685 }
b0138e99 4686 /* ~~ %hash */
61a621c6 4687 else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVHV) {
41e726ac
RGS		 4688 if (object_on_left) {
4689 goto sm_any_hash; /* Treat objects like scalars */
4690 }
4691 else if (!SvOK(d)) {
d7c0d282 4692 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Hash ($a undef)\n"));
61a621c6
RGS		 4693 RETPUSHNO;
4694 }
4695 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) {
0d863452
RH		 4696 /* Check that the key-sets are identical */
4697 HE *he;
61a621c6 4698 HV *other_hv = MUTABLE_HV(SvRV(d));
6bb3f245
DD		 4699 bool tied;
4700 bool other_tied;
0d863452
RH		 4701 U32 this_key_count = 0,
4702 other_key_count = 0;
33ed63a2 4703 HV *hv = MUTABLE_HV(SvRV(e));
d7c0d282
DM		 4704
4705 DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Hash\n"));
0d863452 4706 /* Tied hashes don't know how many keys they have. */
6bb3f245
DD		 4707 tied = cBOOL(SvTIED_mg((SV*)hv, PERL_MAGIC_tied));
4708 other_tied = cBOOL(SvTIED_mg((const SV *)other_hv, PERL_MAGIC_tied));
4709 if (!tied ) {
4710 if(other_tied) {
4711 /* swap HV sides */
4712 HV * const temp = other_hv;
4713 other_hv = hv;
4714 hv = temp;
4715 tied = TRUE;
4716 other_tied = FALSE;
4717 }
4718 else if(HvUSEDKEYS((const HV *) hv) != HvUSEDKEYS(other_hv))
4719 RETPUSHNO;
0d863452 4720 }
0d863452
RH		 4721
4722 /* The hashes have the same number of keys, so it suffices
4723 to check that one is a subset of the other. */
33ed63a2
RGS		 4724 (void) hv_iterinit(hv);
4725 while ( (he = hv_iternext(hv)) ) {
b15feb55 4726 SV *key = hv_iterkeysv(he);
d7c0d282
DM		 4727
4728 DEBUG_M(Perl_deb(aTHX_ " comparing hash key...\n"));
0d863452
RH		 4729 ++ this_key_count;
4730
b15feb55 4731 if(!hv_exists_ent(other_hv, key, 0)) {
33ed63a2 4732 (void) hv_iterinit(hv); /* reset iterator */
0d863452
RH		 4733 RETPUSHNO;
4734 }
4735 }
4736
4737 if (other_tied) {
4738 (void) hv_iterinit(other_hv);
4739 while ( hv_iternext(other_hv) )
4740 ++other_key_count;
4741 }
4742 else
4743 other_key_count = HvUSEDKEYS(other_hv);
4744
4745 if (this_key_count != other_key_count)
4746 RETPUSHNO;
4747 else
4748 RETPUSHYES;
4749 }
61a621c6
RGS		 4750 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
4751 AV * const other_av = MUTABLE_AV(SvRV(d));
b9f2b683 4752 const SSize_t other_len = av_tindex(other_av) + 1;
c70927a6 4753 SSize_t i;
33ed63a2 4754 HV *hv = MUTABLE_HV(SvRV(e));
71b0fb34 4755
d7c0d282 4756 DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Hash\n"));
71b0fb34 4757 for (i = 0; i < other_len; ++i) {
c445ea15 4758 SV ** const svp = av_fetch(other_av, i, FALSE);
d7c0d282 4759 DEBUG_M(Perl_deb(aTHX_ " checking for key existence...\n"));
71b0fb34 4760 if (svp) { /* ??? When can this not happen? */
b15feb55 4761 if (hv_exists_ent(hv, *svp, 0))
71b0fb34
DK		 4762 RETPUSHYES;
4763 }
0d863452 4764 }
71b0fb34 4765 RETPUSHNO;
0d863452 4766 }
a566f585 4767 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_REGEXP) {
d7c0d282 4768 DEBUG_M(Perl_deb(aTHX_ " applying rule Regex-Hash\n"));
ea0c2dbd
RGS		 4769 sm_regex_hash:
4770 {
4771 PMOP * const matcher = make_matcher((REGEXP*) SvRV(d));
4772 HE *he;
4773 HV *hv = MUTABLE_HV(SvRV(e));
4774
4775 (void) hv_iterinit(hv);
4776 while ( (he = hv_iternext(hv)) ) {
d7c0d282 4777 DEBUG_M(Perl_deb(aTHX_ " testing key against pattern...\n"));
ea0c2dbd
RGS		 4778 if (matcher_matches_sv(matcher, hv_iterkeysv(he))) {
4779 (void) hv_iterinit(hv);
4780 destroy_matcher(matcher);
4781 RETPUSHYES;
4782 }
0d863452 4783 }
ea0c2dbd
RGS		 4784 destroy_matcher(matcher);
4785 RETPUSHNO;
0d863452 4786 }
0d863452
RH		 4787 }
4788 else {
41e726ac 4789 sm_any_hash:
d7c0d282 4790 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Hash\n"));
61a621c6 4791 if (hv_exists_ent(MUTABLE_HV(SvRV(e)), d, 0))
0d863452
RH		 4792 RETPUSHYES;
4793 else
4794 RETPUSHNO;
4795 }
4796 }
b0138e99
RGS		 4797 /* ~~ @array */
4798 else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVAV) {
41e726ac
RGS		 4799 if (object_on_left) {
4800 goto sm_any_array; /* Treat objects like scalars */
4801 }
4802 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) {
b0138e99 4803 AV * const other_av = MUTABLE_AV(SvRV(e));
b9f2b683 4804 const SSize_t other_len = av_tindex(other_av) + 1;
c70927a6 4805 SSize_t i;
b0138e99 4806
d7c0d282 4807 DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Array\n"));
b0138e99
RGS		 4808 for (i = 0; i < other_len; ++i) {
4809 SV ** const svp = av_fetch(other_av, i, FALSE);
d7c0d282
DM		 4810
4811 DEBUG_M(Perl_deb(aTHX_ " testing for key existence...\n"));
b0138e99 4812 if (svp) { /* ??? When can this not happen? */
b15feb55 4813 if (hv_exists_ent(MUTABLE_HV(SvRV(d)), *svp, 0))
b0138e99
RGS		 4814 RETPUSHYES;
4815 }
4816 }
4817 RETPUSHNO;
4818 }
4819 if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
4820 AV *other_av = MUTABLE_AV(SvRV(d));
d7c0d282 4821 DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Array\n"));
b9f2b683 4822 if (av_tindex(MUTABLE_AV(SvRV(e))) != av_tindex(other_av))
0d863452
RH		 4823 RETPUSHNO;
4824 else {
c70927a6 4825 SSize_t i;
b9f2b683 4826 const SSize_t other_len = av_tindex(other_av);
0d863452 4827
a0714e2c 4828 if (NULL == seen_this) {
0d863452 4829 seen_this = newHV();
ad64d0ec 4830 (void) sv_2mortal(MUTABLE_SV(seen_this));
0d863452 4831 }
a0714e2c 4832 if (NULL == seen_other) {
6bc991bf 4833 seen_other = newHV();
ad64d0ec 4834 (void) sv_2mortal(MUTABLE_SV(seen_other));
0d863452
RH		 4835 }
4836 for(i = 0; i <= other_len; ++i) {
b0138e99 4837 SV * const * const this_elem = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE);
c445ea15
AL		 4838 SV * const * const other_elem = av_fetch(other_av, i, FALSE);
4839
0d863452 4840 if (!this_elem || !other_elem) {
69c3dccf
RGS		 4841 if ((this_elem && SvOK(*this_elem))
4842 || (other_elem && SvOK(*other_elem)))
0d863452
RH		 4843 RETPUSHNO;
4844 }
365c4e3d
RGS		 4845 else if (hv_exists_ent(seen_this,
4846 sv_2mortal(newSViv(PTR2IV(*this_elem))), 0) ||
4847 hv_exists_ent(seen_other,
4848 sv_2mortal(newSViv(PTR2IV(*other_elem))), 0))
0d863452
RH		 4849 {
4850 if (*this_elem != *other_elem)
4851 RETPUSHNO;
4852 }
4853 else {
04fe65b0
RGS		 4854 (void)hv_store_ent(seen_this,
4855 sv_2mortal(newSViv(PTR2IV(*this_elem))),
4856 &PL_sv_undef, 0);
4857 (void)hv_store_ent(seen_other,
4858 sv_2mortal(newSViv(PTR2IV(*other_elem))),
4859 &PL_sv_undef, 0);
0d863452 4860 PUSHs(*other_elem);
a566f585 4861 PUSHs(*this_elem);
0d863452
RH		 4862
4863 PUTBACK;
d7c0d282 4864 DEBUG_M(Perl_deb(aTHX_ " recursively comparing array element...\n"));
be88a5c3 4865 (void) do_smartmatch(seen_this, seen_other, 0);
0d863452 4866 SPAGAIN;
d7c0d282 4867 DEBUG_M(Perl_deb(aTHX_ " recursion finished\n"));
0d863452
RH		 4868
4869 if (!SvTRUEx(POPs))
4870 RETPUSHNO;
4871 }
4872 }
4873 RETPUSHYES;
4874 }
4875 }
a566f585 4876 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_REGEXP) {
d7c0d282 4877 DEBUG_M(Perl_deb(aTHX_ " applying rule Regex-Array\n"));
ea0c2dbd
RGS		 4878 sm_regex_array:
4879 {
4880 PMOP * const matcher = make_matcher((REGEXP*) SvRV(d));
b9f2b683 4881 const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e)));
c70927a6 4882 SSize_t i;
0d863452 4883
ea0c2dbd
RGS		 4884 for(i = 0; i <= this_len; ++i) {
4885 SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE);
d7c0d282 4886 DEBUG_M(Perl_deb(aTHX_ " testing element against pattern...\n"));
ea0c2dbd
RGS		 4887 if (svp && matcher_matches_sv(matcher, *svp)) {
4888 destroy_matcher(matcher);
4889 RETPUSHYES;
4890 }
0d863452 4891 }
ea0c2dbd
RGS		 4892 destroy_matcher(matcher);
4893 RETPUSHNO;
0d863452 4894 }
0d863452 4895 }
015eb7b9
RGS		 4896 else if (!SvOK(d)) {
4897 /* undef ~~ array */
b9f2b683 4898 const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e)));
c70927a6 4899 SSize_t i;
0d863452 4900
d7c0d282 4901 DEBUG_M(Perl_deb(aTHX_ " applying rule Undef-Array\n"));
015eb7b9 4902 for (i = 0; i <= this_len; ++i) {
b0138e99 4903 SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE);
d7c0d282 4904 DEBUG_M(Perl_deb(aTHX_ " testing for undef element...\n"));
015eb7b9 4905 if (!svp || !SvOK(*svp))
0d863452
RH		 4906 RETPUSHYES;
4907 }
4908 RETPUSHNO;
4909 }
015eb7b9 4910 else {
41e726ac
RGS		 4911 sm_any_array:
4912 {
c70927a6 4913 SSize_t i;
b9f2b683 4914 const SSize_t this_len = av_tindex(MUTABLE_AV(SvRV(e)));
0d863452 4915
d7c0d282 4916 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Array\n"));
41e726ac
RGS		 4917 for (i = 0; i <= this_len; ++i) {
4918 SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE);
4919 if (!svp)
4920 continue;
015eb7b9 4921
41e726ac
RGS		 4922 PUSHs(d);
4923 PUSHs(*svp);
4924 PUTBACK;
4925 /* infinite recursion isn't supposed to happen here */
d7c0d282 4926 DEBUG_M(Perl_deb(aTHX_ " recursively testing array element...\n"));
be88a5c3 4927 (void) do_smartmatch(NULL, NULL, 1);
41e726ac 4928 SPAGAIN;
d7c0d282 4929 DEBUG_M(Perl_deb(aTHX_ " recursion finished\n"));
41e726ac
RGS		 4930 if (SvTRUEx(POPs))
4931 RETPUSHYES;
4932 }
4933 RETPUSHNO;
0d863452 4934 }
0d863452
RH		 4935 }
4936 }
b0138e99 4937 /* ~~ qr// */
a566f585 4938 else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_REGEXP) {
ea0c2dbd
RGS		 4939 if (!object_on_left && SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) {
4940 SV *t = d; d = e; e = t;
d7c0d282 4941 DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Regex\n"));
ea0c2dbd
RGS		 4942 goto sm_regex_hash;
4943 }
4944 else if (!object_on_left && SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
4945 SV *t = d; d = e; e = t;
d7c0d282 4946 DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Regex\n"));
ea0c2dbd
RGS		 4947 goto sm_regex_array;
4948 }
4949 else {
4950 PMOP * const matcher = make_matcher((REGEXP*) SvRV(e));
0d863452 4951
d7c0d282 4952 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Regex\n"));
ea0c2dbd
RGS		 4953 PUTBACK;
4954 PUSHs(matcher_matches_sv(matcher, d)
4955 ? &PL_sv_yes
4956 : &PL_sv_no);
4957 destroy_matcher(matcher);
4958 RETURN;
4959 }
0d863452 4960 }
b0138e99 4961 /* ~~ scalar */
2c9d2554
RGS		 4962 /* See if there is overload magic on left */
4963 else if (object_on_left && SvAMAGIC(d)) {
4964 SV *tmpsv;
d7c0d282
DM		 4965 DEBUG_M(Perl_deb(aTHX_ " applying rule Object-Any\n"));
4966 DEBUG_M(Perl_deb(aTHX_ " attempting overload\n"));
2c9d2554
RGS		 4967 PUSHs(d); PUSHs(e);
4968 PUTBACK;
4969 tmpsv = amagic_call(d, e, smart_amg, AMGf_noright);
4970 if (tmpsv) {
4971 SPAGAIN;
4972 (void)POPs;
4973 SETs(tmpsv);
4974 RETURN;
4975 }
4976 SP -= 2;
d7c0d282 4977 DEBUG_M(Perl_deb(aTHX_ " failed to run overload method; falling back...\n"));
2c9d2554
RGS		 4978 goto sm_any_scalar;
4979 }
fb51372e
RGS		 4980 else if (!SvOK(d)) {
4981 /* undef ~~ scalar ; we already know that the scalar is SvOK */
d7c0d282 4982 DEBUG_M(Perl_deb(aTHX_ " applying rule undef-Any\n"));
fb51372e
RGS		 4983 RETPUSHNO;
4984 }
2c9d2554
RGS		 4985 else
4986 sm_any_scalar:
4987 if (SvNIOK(e) || (SvPOK(e) && looks_like_number(e) && SvNIOK(d))) {
d7c0d282
DM		 4988 DEBUG_M(if (SvNIOK(e))
4989 Perl_deb(aTHX_ " applying rule Any-Num\n");
4990 else
4991 Perl_deb(aTHX_ " applying rule Num-numish\n");
4992 );
33ed63a2 4993 /* numeric comparison */
0d863452
RH		 4994 PUSHs(d); PUSHs(e);
4995 PUTBACK;
a98fe34d 4996 if (CopHINTS_get(PL_curcop) & HINT_INTEGER)
897d3989 4997 (void) Perl_pp_i_eq(aTHX);
0d863452 4998 else
897d3989 4999 (void) Perl_pp_eq(aTHX);
0d863452
RH		 5000 SPAGAIN;
5001 if (SvTRUEx(POPs))
5002 RETPUSHYES;
5003 else
5004 RETPUSHNO;
5005 }
5006
5007 /* As a last resort, use string comparison */
d7c0d282 5008 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Any\n"));
0d863452
RH		 5009 PUSHs(d); PUSHs(e);
5010 PUTBACK;
897d3989 5011 return Perl_pp_seq(aTHX);
0d863452
RH		 5012}
5013
5014PP(pp_enterwhen)
5015{
20b7effb 5016 dSP;
eb578fdb 5017 PERL_CONTEXT *cx;
0d863452
RH		 5018 const I32 gimme = GIMME_V;
5019
5020 /* This is essentially an optimization: if the match
5021 fails, we don't want to push a context and then
5022 pop it again right away, so we skip straight
5023 to the op that follows the leavewhen.
25b991bf 5024 RETURNOP calls PUTBACK which restores the stack pointer after the POPs.
0d863452
RH		 5025 */
5026 if ((0 == (PL_op->op_flags & OPf_SPECIAL)) && !SvTRUEx(POPs))
25b991bf 5027 RETURNOP(cLOGOP->op_other->op_next);
0d863452 5028
c08f093b 5029 ENTER_with_name("when");
0d863452
RH		 5030 SAVETMPS;
5031
5032 PUSHBLOCK(cx, CXt_WHEN, SP);
5033 PUSHWHEN(cx);
5034
5035 RETURN;
5036}
5037
5038PP(pp_leavewhen)
5039{
20b7effb 5040 dSP;
c08f093b 5041 I32 cxix;
eb578fdb 5042 PERL_CONTEXT *cx;
c08f093b 5043 I32 gimme;
0d863452
RH		 5044 SV **newsp;
5045 PMOP *newpm;
5046
c08f093b
VP		 5047 cxix = dopoptogiven(cxstack_ix);
5048 if (cxix < 0)
fc7debfb
FC		 5049 /* diag_listed_as: Can't "when" outside a topicalizer */
5050 DIE(aTHX_ "Can't \"%s\" outside a topicalizer",
5051 PL_op->op_flags & OPf_SPECIAL ? "default" : "when");
c08f093b 5052
0d863452
RH		 5053 POPBLOCK(cx,newpm);
5054 assert(CxTYPE(cx) == CXt_WHEN);
5055
2fc507dc 5056 SP = leave_common(newsp, SP, newsp, gimme,
2ec7f6f2 5057 SVs_PADTMP|SVs_TEMP, FALSE);
0d863452
RH		 5058 PL_curpm = newpm; /* pop $1 et al */
5059
c08f093b
VP		 5060 LEAVE_with_name("when");
5061
5062 if (cxix < cxstack_ix)
5063 dounwind(cxix);
5064
5065 cx = &cxstack[cxix];
5066
5067 if (CxFOREACH(cx)) {
5068 /* clear off anything above the scope we're re-entering */
5069 I32 inner = PL_scopestack_ix;
5070
5071 TOPBLOCK(cx);
5072 if (PL_scopestack_ix < inner)
5073 leave_scope(PL_scopestack[PL_scopestack_ix]);
5074 PL_curcop = cx->blk_oldcop;
5075
47c9d59f 5076 PERL_ASYNC_CHECK();
c08f093b
VP		 5077 return cx->blk_loop.my_op->op_nextop;
5078 }
47c9d59f
NC		 5079 else {
5080 PERL_ASYNC_CHECK();
b1b5a4ae 5081 RETURNOP(cx->blk_givwhen.leave_op);
47c9d59f 5082 }
0d863452
RH		 5083}
5084
5085PP(pp_continue)
5086{
20b7effb 5087 dSP;
0d863452 5088 I32 cxix;
eb578fdb 5089 PERL_CONTEXT *cx;
c08f093b
VP		 5090 I32 gimme;
5091 SV **newsp;
5092 PMOP *newpm;
7be5bd17
FR		 5093
5094 PERL_UNUSED_VAR(gimme);
0d863452
RH		 5095
5096 cxix = dopoptowhen(cxstack_ix);
5097 if (cxix < 0)
5098 DIE(aTHX_ "Can't \"continue\" outside a when block");
c08f093b 5099
0d863452
RH		 5100 if (cxix < cxstack_ix)
5101 dounwind(cxix);
5102
c08f093b
VP		 5103 POPBLOCK(cx,newpm);
5104 assert(CxTYPE(cx) == CXt_WHEN);
5105
5106 SP = newsp;
5107 PL_curpm = newpm; /* pop $1 et al */
5108
5109 LEAVE_with_name("when");
5110 RETURNOP(cx->blk_givwhen.leave_op->op_next);
0d863452
RH		 5111}
5112
5113PP(pp_break)
5114{
0d863452 5115 I32 cxix;
eb578fdb 5116 PERL_CONTEXT *cx;
25b991bf 5117
0d863452 5118 cxix = dopoptogiven(cxstack_ix);
c08f093b
VP		 5119 if (cxix < 0)
5120 DIE(aTHX_ "Can't \"break\" outside a given block");
5121
5122 cx = &cxstack[cxix];
5123 if (CxFOREACH(cx))
0d863452
RH		 5124 DIE(aTHX_ "Can't \"break\" in a loop topicalizer");
5125
5126 if (cxix < cxstack_ix)
5127 dounwind(cxix);
0d863452 5128
0787ea8a
VP		 5129 /* Restore the sp at the time we entered the given block */
5130 TOPBLOCK(cx);
5131
c08f093b 5132 return cx->blk_givwhen.leave_op;
0d863452
RH		 5133}
5134
74e0ddf7 5135static MAGIC *
cea2e8a9 5136S_doparseform(pTHX_ SV *sv)
a0d0e21e
LW		 5137{
5138 STRLEN len;
eb578fdb
KW		 5139 char *s = SvPV(sv, len);
5140 char *send;
5141 char *base = NULL; /* start of current field */
5142 I32 skipspaces = 0; /* number of contiguous spaces seen */
086b26f3
DM		 5143 bool noblank = FALSE; /* ~ or ~~ seen on this line */
5144 bool repeat = FALSE; /* ~~ seen on this line */
5145 bool postspace = FALSE; /* a text field may need right padding */
dea28490 5146 U32 *fops;
eb578fdb 5147 U32 *fpc;
086b26f3 5148 U32 *linepc = NULL; /* position of last FF_LINEMARK */
eb578fdb 5149 I32 arg;
086b26f3
DM		 5150 bool ischop; /* it's a ^ rather than a @ */
5151 bool unchopnum = FALSE; /* at least one @ (i.e. non-chop) num field seen */
a1b95068 5152 int maxops = 12; /* FF_LINEMARK + FF_END + 10 (\0 without preceding \n) */
3808a683
DM		 5153 MAGIC *mg = NULL;
5154 SV *sv_copy;
a0d0e21e 5155
7918f24d
NC		 5156 PERL_ARGS_ASSERT_DOPARSEFORM;
5157
55497cff 5158 if (len == 0)
cea2e8a9 5159 Perl_croak(aTHX_ "Null picture in formline");
ac27b0f5 5160
3808a683
DM		 5161 if (SvTYPE(sv) >= SVt_PVMG) {
5162 /* This might, of course, still return NULL. */
5163 mg = mg_find(sv, PERL_MAGIC_fm);
5164 } else {
5165 sv_upgrade(sv, SVt_PVMG);
5166 }
5167
5168 if (mg) {
5169 /* still the same as previously-compiled string? */
5170 SV *old = mg->mg_obj;
5171 if ( !(!!SvUTF8(old) ^ !!SvUTF8(sv))
5172 && len == SvCUR(old)
5173 && strnEQ(SvPVX(old), SvPVX(sv), len)
b57b1734
DM		 5174 ) {
5175 DEBUG_f(PerlIO_printf(Perl_debug_log,"Re-using compiled format\n"));
3808a683 5176 return mg;
b57b1734 5177 }
3808a683 5178
b57b1734 5179 DEBUG_f(PerlIO_printf(Perl_debug_log, "Re-compiling format\n"));
3808a683
DM		 5180 Safefree(mg->mg_ptr);
5181 mg->mg_ptr = NULL;
5182 SvREFCNT_dec(old);
5183 mg->mg_obj = NULL;
5184 }
b57b1734
DM		 5185 else {
5186 DEBUG_f(PerlIO_printf(Perl_debug_log, "Compiling format\n"));
3808a683 5187 mg = sv_magicext(sv, NULL, PERL_MAGIC_fm, &PL_vtbl_fm, NULL, 0);
b57b1734 5188 }
3808a683
DM		 5189
5190 sv_copy = newSVpvn_utf8(s, len, SvUTF8(sv));
5191 s = SvPV(sv_copy, len); /* work on the copy, not the original */
5192 send = s + len;
5193
5194
815f25c6
DM		 5195 /* estimate the buffer size needed */
5196 for (base = s; s <= send; s++) {
a1b95068 5197 if (*s == '\n' || *s == '@' || *s == '^')
815f25c6
DM		 5198 maxops += 10;
5199 }
5200 s = base;
c445ea15 5201 base = NULL;
815f25c6 5202
a02a5408 5203 Newx(fops, maxops, U32);
a0d0e21e
LW		 5204 fpc = fops;
5205
5206 if (s < send) {
5207 linepc = fpc;
5208 *fpc++ = FF_LINEMARK;
5209 noblank = repeat = FALSE;
5210 base = s;
5211 }
5212
5213 while (s <= send) {
5214 switch (*s++) {
5215 default:
5216 skipspaces = 0;
5217 continue;
5218
5219 case '~':
5220 if (*s == '~') {
5221 repeat = TRUE;
b57b1734
DM		 5222 skipspaces++;
5223 s++;
a0d0e21e
LW		 5224 }
5225 noblank = TRUE;
924ba076 5226 /* FALLTHROUGH */
a0d0e21e
LW		 5227 case ' ': case '\t':
5228 skipspaces++;
5229 continue;
a1b95068
WL		 5230 case 0:
5231 if (s < send) {
5232 skipspaces = 0;
5233 continue;
5234 } /* else FALL THROUGH */
5235 case '\n':
a0d0e21e
LW		 5236 arg = s - base;
5237 skipspaces++;
5238 arg -= skipspaces;
5239 if (arg) {
5f05dabc 5240 if (postspace)
a0d0e21e 5241 *fpc++ = FF_SPACE;
a0d0e21e 5242 *fpc++ = FF_LITERAL;
76912796 5243 *fpc++ = (U32)arg;
a0d0e21e 5244 }
5f05dabc 5245 postspace = FALSE;
a0d0e21e
LW		 5246 if (s <= send)
5247 skipspaces--;
5248 if (skipspaces) {
5249 *fpc++ = FF_SKIP;
76912796 5250 *fpc++ = (U32)skipspaces;
a0d0e21e
LW		 5251 }
5252 skipspaces = 0;
5253 if (s <= send)
5254 *fpc++ = FF_NEWLINE;
5255 if (noblank) {
5256 *fpc++ = FF_BLANK;
5257 if (repeat)
5258 arg = fpc - linepc + 1;
5259 else
5260 arg = 0;
76912796 5261 *fpc++ = (U32)arg;
a0d0e21e
LW		 5262 }
5263 if (s < send) {
5264 linepc = fpc;
5265 *fpc++ = FF_LINEMARK;
5266 noblank = repeat = FALSE;
5267 base = s;
5268 }
5269 else
5270 s++;
5271 continue;
5272
5273 case '@':
5274 case '^':
5275 ischop = s[-1] == '^';
5276
5277 if (postspace) {
5278 *fpc++ = FF_SPACE;
5279 postspace = FALSE;
5280 }
5281 arg = (s - base) - 1;
5282 if (arg) {
5283 *fpc++ = FF_LITERAL;
76912796 5284 *fpc++ = (U32)arg;
a0d0e21e
LW		 5285 }
5286
5287 base = s - 1;
5288 *fpc++ = FF_FETCH;
086b26f3 5289 if (*s == '*') { /* @* or ^* */
a0d0e21e 5290 s++;
a1b95068
WL		 5291 *fpc++ = 2; /* skip the @* or ^* */
5292 if (ischop) {
5293 *fpc++ = FF_LINESNGL;
5294 *fpc++ = FF_CHOP;
5295 } else
5296 *fpc++ = FF_LINEGLOB;
a0d0e21e 5297 }
086b26f3 5298 else if (*s == '#' || (*s == '.' && s[1] == '#')) { /* @###, ^### */
a701009a 5299 arg = ischop ? FORM_NUM_BLANK : 0;
a0d0e21e
LW		 5300 base = s - 1;
5301 while (*s == '#')
5302 s++;
5303 if (*s == '.') {
06b5626a 5304 const char * const f = ++s;
a0d0e21e
LW		 5305 while (*s == '#')
5306 s++;
a701009a 5307 arg |= FORM_NUM_POINT + (s - f);
a0d0e21e
LW		 5308 }
5309 *fpc++ = s - base; /* fieldsize for FETCH */
5310 *fpc++ = FF_DECIMAL;
76912796 5311 *fpc++ = (U32)arg;
a1b95068 5312 unchopnum |= ! ischop;
784707d5
JP		 5313 }
5314 else if (*s == '0' && s[1] == '#') { /* Zero padded decimals */
a701009a 5315 arg = ischop ? FORM_NUM_BLANK : 0;
784707d5
JP		 5316 base = s - 1;
5317 s++; /* skip the '0' first */
5318 while (*s == '#')
5319 s++;
5320 if (*s == '.') {
06b5626a 5321 const char * const f = ++s;
784707d5
JP		 5322 while (*s == '#')
5323 s++;
a701009a 5324 arg |= FORM_NUM_POINT + (s - f);
784707d5
JP		 5325 }
5326 *fpc++ = s - base; /* fieldsize for FETCH */
5327 *fpc++ = FF_0DECIMAL;
76912796 5328 *fpc++ = (U32)arg;
a1b95068 5329 unchopnum |= ! ischop;
a0d0e21e 5330 }
086b26f3 5331 else { /* text field */
a0d0e21e
LW		 5332 I32 prespace = 0;
5333 bool ismore = FALSE;
5334
5335 if (*s == '>') {
5336 while (*++s == '>') ;
5337 prespace = FF_SPACE;
5338 }
5339 else if (*s == '|') {
5340 while (*++s == '|') ;
5341 prespace = FF_HALFSPACE;
5342 postspace = TRUE;
5343 }
5344 else {
5345 if (*s == '<')
5346 while (*++s == '<') ;
5347 postspace = TRUE;
5348 }
5349 if (*s == '.' && s[1] == '.' && s[2] == '.') {
5350 s += 3;
5351 ismore = TRUE;
5352 }
5353 *fpc++ = s - base; /* fieldsize for FETCH */
5354
5355 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
5356
5357 if (prespace)
76912796 5358 *fpc++ = (U32)prespace; /* add SPACE or HALFSPACE */
a0d0e21e
LW		 5359 *fpc++ = FF_ITEM;
5360 if (ismore)
5361 *fpc++ = FF_MORE;
5362 if (ischop)
5363 *fpc++ = FF_CHOP;
5364 }
5365 base = s;
5366 skipspaces = 0;
5367 continue;
5368 }
5369 }
5370 *fpc++ = FF_END;
5371
815f25c6 5372 assert (fpc <= fops + maxops); /* ensure our buffer estimate was valid */
a0d0e21e 5373 arg = fpc - fops;
74e0ddf7 5374
3808a683 5375 mg->mg_ptr = (char *) fops;
74e0ddf7 5376 mg->mg_len = arg * sizeof(U32);
3808a683
DM		 5377 mg->mg_obj = sv_copy;
5378 mg->mg_flags |= MGf_REFCOUNTED;
a1b95068 5379
bfed75c6 5380 if (unchopnum && repeat)
75f63940 5381 Perl_die(aTHX_ "Repeated format line will never terminate (~~ and @#)");
74e0ddf7
NC		 5382
5383 return mg;
a1b95068
WL		 5384}
5385
5386
5387STATIC bool
5388S_num_overflow(NV value, I32 fldsize, I32 frcsize)
5389{
5390 /* Can value be printed in fldsize chars, using %*.*f ? */
5391 NV pwr = 1;
5392 NV eps = 0.5;
5393 bool res = FALSE;
5394 int intsize = fldsize - (value < 0 ? 1 : 0);
5395
a701009a 5396 if (frcsize & FORM_NUM_POINT)
a1b95068 5397 intsize--;
a701009a 5398 frcsize &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
a1b95068
WL		 5399 intsize -= frcsize;
5400
5401 while (intsize--) pwr *= 10.0;
5402 while (frcsize--) eps /= 10.0;
5403
5404 if( value >= 0 ){
5405 if (value + eps >= pwr)
5406 res = TRUE;
5407 } else {
5408 if (value - eps <= -pwr)
5409 res = TRUE;
5410 }
5411 return res;
a0d0e21e 5412}
4e35701f 5413
bbed91b5 5414static I32
0bd48802 5415S_run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen)
bbed91b5 5416{
0bd48802 5417 SV * const datasv = FILTER_DATA(idx);
504618e9 5418 const int filter_has_file = IoLINES(datasv);
ad64d0ec
NC		 5419 SV * const filter_state = MUTABLE_SV(IoTOP_GV(datasv));
5420 SV * const filter_sub = MUTABLE_SV(IoBOTTOM_GV(datasv));
941a98a0 5421 int status = 0;
ec0b63d7 5422 SV *upstream;
941a98a0 5423 STRLEN got_len;
162177c1
Z		 5424 char *got_p = NULL;
5425 char *prune_from = NULL;
34113e50 5426 bool read_from_cache = FALSE;
bb7a0f54 5427 STRLEN umaxlen;
d60d2019 5428 SV *err = NULL;
bb7a0f54 5429
7918f24d
NC		 5430 PERL_ARGS_ASSERT_RUN_USER_FILTER;
5431
bb7a0f54
MHM		 5432 assert(maxlen >= 0);
5433 umaxlen = maxlen;
5675696b 5434
bbed91b5 5435 /* I was having segfault trouble under Linux 2.2.5 after a
f6bab5f6 5436 parse error occurred. (Had to hack around it with a test
13765c85 5437 for PL_parser->error_count == 0.) Solaris doesn't segfault --
bbed91b5
KF		 5438 not sure where the trouble is yet. XXX */
5439
4464f08e
NC		 5440 {
5441 SV *const cache = datasv;
937b367d
NC		 5442 if (SvOK(cache)) {
5443 STRLEN cache_len;
5444 const char *cache_p = SvPV(cache, cache_len);
941a98a0
NC		 5445 STRLEN take = 0;
5446
bb7a0f54 5447 if (umaxlen) {
941a98a0
NC		 5448 /* Running in block mode and we have some cached data already.
5449 */
bb7a0f54 5450 if (cache_len >= umaxlen) {
941a98a0
NC		 5451 /* In fact, so much data we don't even need to call
5452 filter_read. */
bb7a0f54 5453 take = umaxlen;
941a98a0
NC		 5454 }
5455 } else {
10edeb5d
JH		 5456 const char *const first_nl =
5457 (const char *)memchr(cache_p, '\n', cache_len);
941a98a0
NC		 5458 if (first_nl) {
5459 take = first_nl + 1 - cache_p;
5460 }
5461 }
5462 if (take) {
5463 sv_catpvn(buf_sv, cache_p, take);
5464 sv_chop(cache, cache_p + take);
486ec47a 5465 /* Definitely not EOF */
937b367d
NC		 5466 return 1;
5467 }
941a98a0 5468
937b367d 5469 sv_catsv(buf_sv, cache);
bb7a0f54
MHM		 5470 if (umaxlen) {
5471 umaxlen -= cache_len;
941a98a0 5472 }
937b367d 5473 SvOK_off(cache);
34113e50 5474 read_from_cache = TRUE;
937b367d
NC		 5475 }
5476 }
ec0b63d7 5477
34113e50
NC		 5478 /* Filter API says that the filter appends to the contents of the buffer.
5479 Usually the buffer is "", so the details don't matter. But if it's not,
5480 then clearly what it contains is already filtered by this filter, so we
5481 don't want to pass it in a second time.
5482 I'm going to use a mortal in case the upstream filter croaks. */
ec0b63d7
NC		 5483 upstream = ((SvOK(buf_sv) && sv_len(buf_sv)) || SvGMAGICAL(buf_sv))
5484 ? sv_newmortal() : buf_sv;
5485 SvUPGRADE(upstream, SVt_PV);
937b367d 5486
bbed91b5 5487 if (filter_has_file) {
67e70b33 5488 status = FILTER_READ(idx+1, upstream, 0);
bbed91b5
KF		 5489 }
5490
34113e50 5491 if (filter_sub && status >= 0) {
39644a26 5492 dSP;
bbed91b5
KF		 5493 int count;
5494
d343c3ef 5495 ENTER_with_name("call_filter_sub");
55b5114f 5496 SAVE_DEFSV;
bbed91b5
KF		 5497 SAVETMPS;
5498 EXTEND(SP, 2);
5499
414bf5ae 5500 DEFSV_set(upstream);
bbed91b5 5501 PUSHMARK(SP);
6e449a3a 5502 mPUSHi(0);
bbed91b5
KF		 5503 if (filter_state) {
5504 PUSHs(filter_state);
5505 }
5506 PUTBACK;
d60d2019 5507 count = call_sv(filter_sub, G_SCALAR|G_EVAL);
bbed91b5
KF		 5508 SPAGAIN;
5509
5510 if (count > 0) {
5511 SV *out = POPs;
2e8409ad 5512 SvGETMAGIC(out);
bbed91b5 5513 if (SvOK(out)) {
941a98a0 5514 status = SvIV(out);
bbed91b5 5515 }
eed484f9
DD		 5516 else {
5517 SV * const errsv = ERRSV;
5518 if (SvTRUE_NN(errsv))
5519 err = newSVsv(errsv);
d60d2019 5520 }
bbed91b5
KF		 5521 }
5522
5523 PUTBACK;
5524 FREETMPS;
d343c3ef 5525 LEAVE_with_name("call_filter_sub");
bbed91b5
KF		 5526 }
5527
536ac391
FC		 5528 if (SvGMAGICAL(upstream)) {
5529 mg_get(upstream);
5530 if (upstream == buf_sv) mg_free(buf_sv);
5531 }
b68108d9 5532 if (SvIsCOW(upstream)) sv_force_normal(upstream);
d60d2019 5533 if(!err && SvOK(upstream)) {
536ac391 5534 got_p = SvPV_nomg(upstream, got_len);
bb7a0f54
MHM		 5535 if (umaxlen) {
5536 if (got_len > umaxlen) {
5537 prune_from = got_p + umaxlen;
937b367d 5538 }
941a98a0 5539 } else {
162177c1 5540 char *const first_nl = (char *)memchr(got_p, '\n', got_len);
941a98a0
NC		 5541 if (first_nl && first_nl + 1 < got_p + got_len) {
5542 /* There's a second line here... */
5543 prune_from = first_nl + 1;
937b367d 5544 }
937b367d
NC		 5545 }
5546 }
d60d2019 5547 if (!err && prune_from) {
941a98a0
NC		 5548 /* Oh. Too long. Stuff some in our cache. */
5549 STRLEN cached_len = got_p + got_len - prune_from;
4464f08e 5550 SV *const cache = datasv;
941a98a0 5551
4464f08e 5552 if (SvOK(cache)) {
941a98a0
NC		 5553 /* Cache should be empty. */
5554 assert(!SvCUR(cache));
5555 }
5556
5557 sv_setpvn(cache, prune_from, cached_len);
5558 /* If you ask for block mode, you may well split UTF-8 characters.
5559 "If it breaks, you get to keep both parts"
5560 (Your code is broken if you don't put them back together again
5561 before something notices.) */
5562 if (SvUTF8(upstream)) {
5563 SvUTF8_on(cache);
5564 }
00752fe1
FC		 5565 if (SvPOK(upstream)) SvCUR_set(upstream, got_len - cached_len);
5566 else
5567 /* Cannot just use sv_setpvn, as that could free the buffer
5568 before we have a chance to assign it. */
5569 sv_usepvn(upstream, savepvn(got_p, got_len - cached_len),
5570 got_len - cached_len);
162177c1 5571 *prune_from = 0;
941a98a0
NC		 5572 /* Can't yet be EOF */
5573 if (status == 0)
5574 status = 1;
5575 }
937b367d 5576
34113e50
NC		 5577 /* If they are at EOF but buf_sv has something in it, then they may never
5578 have touched the SV upstream, so it may be undefined. If we naively
5579 concatenate it then we get a warning about use of uninitialised value.
5580 */
d60d2019 5581 if (!err && upstream != buf_sv &&
dc423e96 5582 SvOK(upstream)) {
536ac391 5583 sv_catsv_nomg(buf_sv, upstream);
937b367d 5584 }
ae2c96ed 5585 else if (SvOK(upstream)) (void)SvPV_force_nolen(buf_sv);
937b367d 5586
941a98a0 5587 if (status <= 0) {
bbed91b5 5588 IoLINES(datasv) = 0;
bbed91b5
KF		 5589 if (filter_state) {
5590 SvREFCNT_dec(filter_state);
a0714e2c 5591 IoTOP_GV(datasv) = NULL;
bbed91b5
KF		 5592 }
5593 if (filter_sub) {
5594 SvREFCNT_dec(filter_sub);
a0714e2c 5595 IoBOTTOM_GV(datasv) = NULL;
bbed91b5 5596 }
0bd48802 5597 filter_del(S_run_user_filter);
bbed91b5 5598 }
d60d2019
JL		 5599
5600 if (err)
5601 croak_sv(err);
5602
34113e50
NC		 5603 if (status == 0 && read_from_cache) {
5604 /* If we read some data from the cache (and by getting here it implies
5605 that we emptied the cache) then we aren't yet at EOF, and mustn't
5606 report that to our caller. */
5607 return 1;
5608 }
941a98a0 5609 return status;
bbed91b5 5610}
84d4ea48 5611
241d1a3b
NC		 5612/*
5613 * Local variables:
5614 * c-indentation-style: bsd
5615 * c-basic-offset: 4
14d04a33 5616 * indent-tabs-mode: nil
241d1a3b
NC		 5617 * End:
5618 *
14d04a33 5619 * ex: set ts=8 sts=4 sw=4 et:
37442d52 5620 */
Unnamed repository; edit this file 'description' to name the repository.