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[perl #56526] m/a{1,0}/ compiles but doesn't match a literal string
[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/*
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
166f8a29
DM		 20/* This file contains control-oriented pp ("push/pop") functions that
21 * execute the opcodes that make up a perl program. A typical pp function
22 * expects to find its arguments on the stack, and usually pushes its
23 * results onto the stack, hence the 'pp' terminology. Each OP structure
24 * contains a pointer to the relevant pp_foo() function.
25 *
26 * Control-oriented means things like pp_enteriter() and pp_next(), which
27 * alter the flow of control of the program.
28 */
29
30
a0d0e21e 31#include "EXTERN.h"
864dbfa3 32#define PERL_IN_PP_CTL_C
a0d0e21e
LW		 33#include "perl.h"
34
35#ifndef WORD_ALIGN
dea28490 36#define WORD_ALIGN sizeof(U32)
a0d0e21e
LW		 37#endif
38
54310121 39#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 40
94fcd414
NC		 41#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
42
a0d0e21e
LW		 43PP(pp_wantarray)
44{
97aff369 45 dVAR;
39644a26 46 dSP;
a0d0e21e
LW		 47 I32 cxix;
48 EXTEND(SP, 1);
49
50 cxix = dopoptosub(cxstack_ix);
51 if (cxix < 0)
52 RETPUSHUNDEF;
53
54310121 54 switch (cxstack[cxix].blk_gimme) {
55 case G_ARRAY:
a0d0e21e 56 RETPUSHYES;
54310121 57 case G_SCALAR:
a0d0e21e 58 RETPUSHNO;
54310121 59 default:
60 RETPUSHUNDEF;
61 }
a0d0e21e
LW		 62}
63
2cd61cdb
IZ		 64PP(pp_regcreset)
65{
97aff369 66 dVAR;
2cd61cdb
IZ		 67 /* XXXX Should store the old value to allow for tie/overload - and
68 restore in regcomp, where marked with XXXX. */
3280af22 69 PL_reginterp_cnt = 0;
0b4182de 70 TAINT_NOT;
2cd61cdb
IZ		 71 return NORMAL;
72}
73
b3eb6a9b
GS		 74PP(pp_regcomp)
75{
97aff369 76 dVAR;
39644a26 77 dSP;
a0d0e21e 78 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 79 SV *tmpstr;
84679df5 80 REGEXP *re = NULL;
bfed75c6 81
4b5a0d1c 82 /* prevent recompiling under /o and ithreads. */
3db8f154 83#if defined(USE_ITHREADS)
131b3ad0
DM		 84 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
85 if (PL_op->op_flags & OPf_STACKED) {
86 dMARK;
87 SP = MARK;
88 }
89 else
90 (void)POPs;
91 RETURN;
92 }
513629ba 93#endif
131b3ad0
DM		 94 if (PL_op->op_flags & OPf_STACKED) {
95 /* multiple args; concatentate them */
96 dMARK; dORIGMARK;
97 tmpstr = PAD_SV(ARGTARG);
76f68e9b 98 sv_setpvs(tmpstr, "");
131b3ad0
DM		 99 while (++MARK <= SP) {
100 if (PL_amagic_generation) {
101 SV *sv;
102 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
103 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
104 {
105 sv_setsv(tmpstr, sv);
106 continue;
107 }
108 }
109 sv_catsv(tmpstr, *MARK);
110 }
111 SvSETMAGIC(tmpstr);
112 SP = ORIGMARK;
113 }
114 else
115 tmpstr = POPs;
513629ba 116
b3eb6a9b 117 if (SvROK(tmpstr)) {
d8f6592e 118 SV * const sv = SvRV(tmpstr);
5c35adbb 119 if (SvTYPE(sv) == SVt_REGEXP)
d2f13c59 120 re = (REGEXP*) sv;
c277df42 121 }
5c35adbb
NC		 122 if (re) {
123 re = reg_temp_copy(re);
aaa362c4 124 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 125 PM_SETRE(pm, re);
c277df42
IZ		 126 }
127 else {
e62f0680 128 STRLEN len;
3ab4a224 129 const char *t = SvOK(tmpstr) ? SvPV_const(tmpstr, len) : "";
c737faaf 130 re = PM_GETRE(pm);
14a49a24 131 assert (re != (REGEXP*) &PL_sv_undef);
c277df42 132
20408e3c 133 /* Check against the last compiled regexp. */
a11c8683 134 if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
220fc49f 135 memNE(RX_PRECOMP(re), t, len))
85aff577 136 {
07bc277f 137 const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
c737faaf 138 U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME;
d8f6592e
AL		 139 if (re) {
140 ReREFCNT_dec(re);
14a49a24
NC		 141#ifdef USE_ITHREADS
142 PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
143#else
4608196e 144 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
14a49a24 145#endif
1e2e3d02
YO		 146 } else if (PL_curcop->cop_hints_hash) {
147 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
148 "regcomp", 7, 0, 0);
149 if (ptr && SvIOK(ptr) && SvIV(ptr))
150 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 151 }
664e119d 152
533c011a 153 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 154 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 155
b9ad30b4
NC		 156 if (DO_UTF8(tmpstr)) {
157 assert (SvUTF8(tmpstr));
158 } else if (SvUTF8(tmpstr)) {
159 /* Not doing UTF-8, despite what the SV says. Is this only if
160 we're trapped in use 'bytes'? */
161 /* Make a copy of the octet sequence, but without the flag on,
162 as the compiler now honours the SvUTF8 flag on tmpstr. */
163 STRLEN len;
164 const char *const p = SvPV(tmpstr, len);
165 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
166 }
c737faaf 167
3ab4a224
AB		 168 if (eng)
169 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
170 else
171 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 172
f86aaa29 173 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 174 inside tie/overload accessors. */
c277df42 175 }
4633a7c4 176 }
c737faaf
YO		 177
178 re = PM_GETRE(pm);
a0d0e21e 179
72311751 180#ifndef INCOMPLETE_TAINTS
3280af22
NIS		 181 if (PL_tainting) {
182 if (PL_tainted)
07bc277f 183 RX_EXTFLAGS(re) |= RXf_TAINTED;
72311751 184 else
07bc277f 185 RX_EXTFLAGS(re) &= ~RXf_TAINTED;
72311751
GS		 186 }
187#endif
188
220fc49f 189 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 190 pm = PL_curpm;
a0d0e21e 191
c737faaf
YO		 192
193#if !defined(USE_ITHREADS)
194 /* can't change the optree at runtime either */
195 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 196 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 197 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 198 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 199 }
c737faaf 200#endif
a0d0e21e
LW		 201 RETURN;
202}
203
204PP(pp_substcont)
205{
97aff369 206 dVAR;
39644a26 207 dSP;
c09156bb 208 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL		 209 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
210 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW		 211 register char *s = cx->sb_s;
212 register char *m = cx->sb_m;
213 char *orig = cx->sb_orig;
901017d6 214 register REGEXP * const rx = cx->sb_rx;
c445ea15 215 SV *nsv = NULL;
988e6e7e
AE		 216 REGEXP *old = PM_GETRE(pm);
217 if(old != rx) {
bfed75c6 218 if(old)
988e6e7e 219 ReREFCNT_dec(old);
d6106309 220 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB		 221 }
222
d9f97599 223 rxres_restore(&cx->sb_rxres, rx);
01b35787 224 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 225
a0d0e21e 226 if (cx->sb_iters++) {
a3b680e6 227 const I32 saviters = cx->sb_iters;
a0d0e21e 228 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 229 DIE(aTHX_ "Substitution loop");
a0d0e21e 230
48c036b1
GS		 231 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
232 cx->sb_rxtainted |= 2;
a0d0e21e 233 sv_catsv(dstr, POPs);
a0d0e21e
LW		 234
235 /* Are we done */
c5bed6a7 236 if (CxONCE(cx) || !CALLREGEXEC(rx, s, cx->sb_strend, orig,
9661b544 237 s == m, cx->sb_targ, NULL,
22e551b9 238 ((cx->sb_rflags & REXEC_COPY_STR)
cf93c79d
IZ		 239 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
240 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 241 {
823a54a3 242 SV * const targ = cx->sb_targ;
748a9306 243
078c425b
JH		 244 assert(cx->sb_strend >= s);
245 if(cx->sb_strend > s) {
246 if (DO_UTF8(dstr) && !SvUTF8(targ))
247 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
248 else
249 sv_catpvn(dstr, s, cx->sb_strend - s);
250 }
48c036b1 251 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 252
f8c7b90f 253#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 254 if (SvIsCOW(targ)) {
255 sv_force_normal_flags(targ, SV_COW_DROP_PV);
256 } else
257#endif
258 {
8bd4d4c5 259 SvPV_free(targ);
ed252734 260 }
f880fe2f 261 SvPV_set(targ, SvPVX(dstr));
748a9306
LW		 262 SvCUR_set(targ, SvCUR(dstr));
263 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH		 264 if (DO_UTF8(dstr))
265 SvUTF8_on(targ);
6136c704 266 SvPV_set(dstr, NULL);
48c036b1
GS		 267
268 TAINT_IF(cx->sb_rxtainted & 1);
6e449a3a 269 mPUSHi(saviters - 1);
48c036b1 270
ffc61ed2 271 (void)SvPOK_only_UTF8(targ);
48c036b1 272 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 273 SvSETMAGIC(targ);
9212bbba 274 SvTAINT(targ);
5cd24f17 275
4633a7c4 276 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW		 277 POPSUBST(cx);
278 RETURNOP(pm->op_next);
279 }
8e5e9ebe 280 cx->sb_iters = saviters;
a0d0e21e 281 }
07bc277f 282 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW		 283 m = s;
284 s = orig;
07bc277f 285 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW		 286 s = orig + (m - s);
287 cx->sb_strend = s + (cx->sb_strend - m);
288 }
07bc277f 289 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 290 if (m > s) {
bfed75c6 291 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH		 292 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
293 else
294 sv_catpvn(dstr, s, m-s);
295 }
07bc277f 296 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 297 { /* Update the pos() information. */
44f8325f 298 SV * const sv = cx->sb_targ;
084916e3 299 MAGIC *mg;
7a7f3e45 300 SvUPGRADE(sv, SVt_PVMG);
14befaf4 301 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 302#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 303 if (SvIsCOW(sv))
d83f0a82
NC		 304 sv_force_normal_flags(sv, 0);
305#endif
306 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
307 NULL, 0);
084916e3 308 }
ce474962 309 mg->mg_len = m - orig;
084916e3 310 }
988e6e7e 311 if (old != rx)
d6106309 312 (void)ReREFCNT_inc(rx);
d9f97599
GS		 313 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
314 rxres_save(&cx->sb_rxres, rx);
29f2e912 315 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW		 316}
317
c90c0ff4 318void
864dbfa3 319Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 320{
321 UV *p = (UV*)*rsp;
322 U32 i;
7918f24d
NC		 323
324 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 325 PERL_UNUSED_CONTEXT;
c90c0ff4 326
07bc277f 327 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 328#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 329 i = 7 + RX_NPARENS(rx) * 2;
ed252734 330#else
07bc277f 331 i = 6 + RX_NPARENS(rx) * 2;
ed252734 332#endif
c90c0ff4 333 if (!p)
a02a5408 334 Newx(p, i, UV);
c90c0ff4 335 else
336 Renew(p, i, UV);
337 *rsp = (void*)p;
338 }
339
07bc277f 340 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 341 RX_MATCH_COPIED_off(rx);
c90c0ff4 342
f8c7b90f 343#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC		 344 *p++ = PTR2UV(RX_SAVED_COPY(rx));
345 RX_SAVED_COPY(rx) = NULL;
ed252734
NC		 346#endif
347
07bc277f 348 *p++ = RX_NPARENS(rx);
c90c0ff4 349
07bc277f
NC		 350 *p++ = PTR2UV(RX_SUBBEG(rx));
351 *p++ = (UV)RX_SUBLEN(rx);
352 for (i = 0; i <= RX_NPARENS(rx); ++i) {
353 *p++ = (UV)RX_OFFS(rx)[i].start;
354 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4 355 }
356}
357
358void
864dbfa3 359Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 360{
361 UV *p = (UV*)*rsp;
362 U32 i;
7918f24d
NC		 363
364 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 365 PERL_UNUSED_CONTEXT;
c90c0ff4 366
ed252734 367 RX_MATCH_COPY_FREE(rx);
cf93c79d 368 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4 369 *p++ = 0;
370
f8c7b90f 371#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC		 372 if (RX_SAVED_COPY(rx))
373 SvREFCNT_dec (RX_SAVED_COPY(rx));
374 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC		 375 *p++ = 0;
376#endif
377
07bc277f 378 RX_NPARENS(rx) = *p++;
c90c0ff4 379
07bc277f
NC		 380 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
381 RX_SUBLEN(rx) = (I32)(*p++);
382 for (i = 0; i <= RX_NPARENS(rx); ++i) {
383 RX_OFFS(rx)[i].start = (I32)(*p++);
384 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4 385 }
386}
387
388void
864dbfa3 389Perl_rxres_free(pTHX_ void **rsp)
c90c0ff4 390{
44f8325f 391 UV * const p = (UV*)*rsp;
7918f24d
NC		 392
393 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 394 PERL_UNUSED_CONTEXT;
c90c0ff4 395
396 if (p) {
94010e71
NC		 397#ifdef PERL_POISON
398 void *tmp = INT2PTR(char*,*p);
399 Safefree(tmp);
400 if (*p)
7e337ee0 401 PoisonFree(*p, 1, sizeof(*p));
94010e71 402#else
56431972 403 Safefree(INT2PTR(char*,*p));
94010e71 404#endif
f8c7b90f 405#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 406 if (p[1]) {
407 SvREFCNT_dec (INT2PTR(SV*,p[1]));
408 }
409#endif
c90c0ff4 410 Safefree(p);
4608196e 411 *rsp = NULL;
c90c0ff4 412 }
413}
414
a0d0e21e
LW		 415PP(pp_formline)
416{
97aff369 417 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 418 register SV * const tmpForm = *++MARK;
dea28490 419 register U32 *fpc;
a0d0e21e 420 register char *t;
245d4a47 421 const char *f;
a0d0e21e 422 register I32 arg;
c445ea15
AL		 423 register SV *sv = NULL;
424 const char *item = NULL;
9c5ffd7c
JH		 425 I32 itemsize = 0;
426 I32 fieldsize = 0;
a0d0e21e 427 I32 lines = 0;
c445ea15
AL		 428 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
429 const char *chophere = NULL;
430 char *linemark = NULL;
65202027 431 NV value;
9c5ffd7c 432 bool gotsome = FALSE;
a0d0e21e 433 STRLEN len;
823a54a3 434 const STRLEN fudge = SvPOK(tmpForm)
24c89738 435 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH		 436 bool item_is_utf8 = FALSE;
437 bool targ_is_utf8 = FALSE;
c445ea15 438 SV * nsv = NULL;
cbbf8932 439 OP * parseres = NULL;
bfed75c6 440 const char *fmt;
a0d0e21e 441
76e3520e 442 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS		 443 if (SvREADONLY(tmpForm)) {
444 SvREADONLY_off(tmpForm);
a1b95068 445 parseres = doparseform(tmpForm);
445b3f51
GS		 446 SvREADONLY_on(tmpForm);
447 }
448 else
a1b95068
WL		 449 parseres = doparseform(tmpForm);
450 if (parseres)
451 return parseres;
a0d0e21e 452 }
3280af22 453 SvPV_force(PL_formtarget, len);
1bd51a4c
IH		 454 if (DO_UTF8(PL_formtarget))
455 targ_is_utf8 = TRUE;
a0ed51b3 456 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 457 t += len;
245d4a47 458 f = SvPV_const(tmpForm, len);
a0d0e21e 459 /* need to jump to the next word */
245d4a47 460 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW		 461
462 for (;;) {
463 DEBUG_f( {
bfed75c6 464 const char *name = "???";
a0d0e21e
LW		 465 arg = -1;
466 switch (*fpc) {
467 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
468 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
469 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
470 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
471 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
472
473 case FF_CHECKNL: name = "CHECKNL"; break;
474 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
475 case FF_SPACE: name = "SPACE"; break;
476 case FF_HALFSPACE: name = "HALFSPACE"; break;
477 case FF_ITEM: name = "ITEM"; break;
478 case FF_CHOP: name = "CHOP"; break;
479 case FF_LINEGLOB: name = "LINEGLOB"; break;
480 case FF_NEWLINE: name = "NEWLINE"; break;
481 case FF_MORE: name = "MORE"; break;
482 case FF_LINEMARK: name = "LINEMARK"; break;
483 case FF_END: name = "END"; break;
bfed75c6 484 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 485 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW		 486 }
487 if (arg >= 0)
bf49b057 488 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 489 else
bf49b057 490 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 491 } );
a0d0e21e
LW		 492 switch (*fpc++) {
493 case FF_LINEMARK:
494 linemark = t;
a0d0e21e
LW		 495 lines++;
496 gotsome = FALSE;
497 break;
498
499 case FF_LITERAL:
500 arg = *fpc++;
1bd51a4c 501 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 502 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH		 503 *t = '\0';
504 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
505 t = SvEND(PL_formtarget);
f3f2f1a3 506 f += arg;
1bd51a4c
IH		 507 break;
508 }
509 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 510 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH		 511 *t = '\0';
512 sv_utf8_upgrade(PL_formtarget);
513 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
514 t = SvEND(PL_formtarget);
515 targ_is_utf8 = TRUE;
516 }
a0d0e21e
LW		 517 while (arg--)
518 *t++ = *f++;
519 break;
520
521 case FF_SKIP:
522 f += *fpc++;
523 break;
524
525 case FF_FETCH:
526 arg = *fpc++;
527 f += arg;
528 fieldsize = arg;
529
530 if (MARK < SP)
531 sv = *++MARK;
532 else {
3280af22 533 sv = &PL_sv_no;
599cee73 534 if (ckWARN(WARN_SYNTAX))
9014280d 535 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW		 536 }
537 break;
538
539 case FF_CHECKNL:
5a34cab7
NC		 540 {
541 const char *send;
542 const char *s = item = SvPV_const(sv, len);
543 itemsize = len;
544 if (DO_UTF8(sv)) {
545 itemsize = sv_len_utf8(sv);
546 if (itemsize != (I32)len) {
547 I32 itembytes;
548 if (itemsize > fieldsize) {
549 itemsize = fieldsize;
550 itembytes = itemsize;
551 sv_pos_u2b(sv, &itembytes, 0);
552 }
553 else
554 itembytes = len;
555 send = chophere = s + itembytes;
556 while (s < send) {
557 if (*s & ~31)
558 gotsome = TRUE;
559 else if (*s == '\n')
560 break;
561 s++;
562 }
563 item_is_utf8 = TRUE;
564 itemsize = s - item;
565 sv_pos_b2u(sv, &itemsize);
566 break;
a0ed51b3 567 }
a0ed51b3 568 }
5a34cab7
NC		 569 item_is_utf8 = FALSE;
570 if (itemsize > fieldsize)
571 itemsize = fieldsize;
572 send = chophere = s + itemsize;
573 while (s < send) {
574 if (*s & ~31)
575 gotsome = TRUE;
576 else if (*s == '\n')
577 break;
578 s++;
579 }
580 itemsize = s - item;
581 break;
a0ed51b3 582 }
a0d0e21e
LW		 583
584 case FF_CHECKCHOP:
5a34cab7
NC		 585 {
586 const char *s = item = SvPV_const(sv, len);
587 itemsize = len;
588 if (DO_UTF8(sv)) {
589 itemsize = sv_len_utf8(sv);
590 if (itemsize != (I32)len) {
591 I32 itembytes;
592 if (itemsize <= fieldsize) {
593 const char *send = chophere = s + itemsize;
594 while (s < send) {
595 if (*s == '\r') {
596 itemsize = s - item;
a0ed51b3 597 chophere = s;
a0ed51b3 598 break;
5a34cab7
NC		 599 }
600 if (*s++ & ~31)
a0ed51b3 601 gotsome = TRUE;
a0ed51b3 602 }
a0ed51b3 603 }
5a34cab7
NC		 604 else {
605 const char *send;
606 itemsize = fieldsize;
607 itembytes = itemsize;
608 sv_pos_u2b(sv, &itembytes, 0);
609 send = chophere = s + itembytes;
610 while (s < send || (s == send && isSPACE(*s))) {
611 if (isSPACE(*s)) {
612 if (chopspace)
613 chophere = s;
614 if (*s == '\r')
615 break;
616 }
617 else {
618 if (*s & ~31)
619 gotsome = TRUE;
620 if (strchr(PL_chopset, *s))
621 chophere = s + 1;
622 }
623 s++;
624 }
625 itemsize = chophere - item;
626 sv_pos_b2u(sv, &itemsize);
627 }
628 item_is_utf8 = TRUE;
a0d0e21e
LW		 629 break;
630 }
a0d0e21e 631 }
5a34cab7
NC		 632 item_is_utf8 = FALSE;
633 if (itemsize <= fieldsize) {
634 const char *const send = chophere = s + itemsize;
635 while (s < send) {
636 if (*s == '\r') {
637 itemsize = s - item;
a0d0e21e 638 chophere = s;
a0d0e21e 639 break;
5a34cab7
NC		 640 }
641 if (*s++ & ~31)
a0d0e21e 642 gotsome = TRUE;
a0d0e21e 643 }
a0d0e21e 644 }
5a34cab7
NC		 645 else {
646 const char *send;
647 itemsize = fieldsize;
648 send = chophere = s + itemsize;
649 while (s < send || (s == send && isSPACE(*s))) {
650 if (isSPACE(*s)) {
651 if (chopspace)
652 chophere = s;
653 if (*s == '\r')
654 break;
655 }
656 else {
657 if (*s & ~31)
658 gotsome = TRUE;
659 if (strchr(PL_chopset, *s))
660 chophere = s + 1;
661 }
662 s++;
663 }
664 itemsize = chophere - item;
665 }
666 break;
a0d0e21e 667 }
a0d0e21e
LW		 668
669 case FF_SPACE:
670 arg = fieldsize - itemsize;
671 if (arg) {
672 fieldsize -= arg;
673 while (arg-- > 0)
674 *t++ = ' ';
675 }
676 break;
677
678 case FF_HALFSPACE:
679 arg = fieldsize - itemsize;
680 if (arg) {
681 arg /= 2;
682 fieldsize -= arg;
683 while (arg-- > 0)
684 *t++ = ' ';
685 }
686 break;
687
688 case FF_ITEM:
5a34cab7
NC		 689 {
690 const char *s = item;
691 arg = itemsize;
692 if (item_is_utf8) {
693 if (!targ_is_utf8) {
694 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
695 *t = '\0';
696 sv_utf8_upgrade(PL_formtarget);
697 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
698 t = SvEND(PL_formtarget);
699 targ_is_utf8 = TRUE;
a0ed51b3 700 }
5a34cab7
NC		 701 while (arg--) {
702 if (UTF8_IS_CONTINUED(*s)) {
703 STRLEN skip = UTF8SKIP(s);
704 switch (skip) {
705 default:
706 Move(s,t,skip,char);
707 s += skip;
708 t += skip;
709 break;
710 case 7: *t++ = *s++;
711 case 6: *t++ = *s++;
712 case 5: *t++ = *s++;
713 case 4: *t++ = *s++;
714 case 3: *t++ = *s++;
715 case 2: *t++ = *s++;
716 case 1: *t++ = *s++;
717 }
718 }
719 else {
720 if ( !((*t++ = *s++) & ~31) )
721 t[-1] = ' ';
722 }
a0ed51b3 723 }
5a34cab7 724 break;
a0ed51b3 725 }
5a34cab7
NC		 726 if (targ_is_utf8 && !item_is_utf8) {
727 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
728 *t = '\0';
729 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
730 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 731#ifdef EBCDIC
901017d6 732 const int ch = *t;
5a34cab7 733 if (iscntrl(ch))
78da4d13 734#else
5a34cab7 735 if (!(*t & ~31))
78da4d13 736#endif
5a34cab7
NC		 737 *t = ' ';
738 }
739 break;
78da4d13 740 }
5a34cab7 741 while (arg--) {
9d116dd7 742#ifdef EBCDIC
901017d6 743 const int ch = *t++ = *s++;
5a34cab7 744 if (iscntrl(ch))
a0d0e21e 745#else
5a34cab7 746 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 747#endif
5a34cab7
NC		 748 t[-1] = ' ';
749 }
750 break;
a0d0e21e 751 }
a0d0e21e
LW		 752
753 case FF_CHOP:
5a34cab7
NC		 754 {
755 const char *s = chophere;
756 if (chopspace) {
af68e756 757 while (isSPACE(*s))
5a34cab7
NC		 758 s++;
759 }
760 sv_chop(sv,s);
761 SvSETMAGIC(sv);
762 break;
a0d0e21e 763 }
a0d0e21e 764
a1b95068
WL		 765 case FF_LINESNGL:
766 chopspace = 0;
a0d0e21e 767 case FF_LINEGLOB:
5a34cab7 768 {
e32383e2 769 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 770 const char *s = item = SvPV_const(sv, len);
f3f2f1a3 771 item_is_utf8 = DO_UTF8(sv);
5a34cab7 772 itemsize = len;
5a34cab7 773 if (itemsize) {
e8e72d41 774 STRLEN to_copy = itemsize;
5a34cab7 775 const char *const send = s + len;
35c6393c 776 const U8 *source = (const U8 *) s;
e8e72d41
NC		 777 U8 *tmp = NULL;
778
5a34cab7
NC		 779 gotsome = TRUE;
780 chophere = s + itemsize;
781 while (s < send) {
782 if (*s++ == '\n') {
783 if (oneline) {
e8e72d41 784 to_copy = s - SvPVX_const(sv) - 1;
5a34cab7
NC		 785 chophere = s;
786 break;
787 } else {
788 if (s == send) {
789 itemsize--;
e8e72d41 790 to_copy--;
5a34cab7
NC		 791 } else
792 lines++;
793 }
1bd51a4c 794 }
a0d0e21e 795 }
e8e72d41 796 if (targ_is_utf8 && !item_is_utf8) {
35c6393c 797 source = tmp = bytes_to_utf8(source, &to_copy);
e8e72d41
NC		 798 SvCUR_set(PL_formtarget,
799 t - SvPVX_const(PL_formtarget));
800 } else {
801 if (item_is_utf8 && !targ_is_utf8) {
802 /* Upgrade targ to UTF8, and then we reduce it to
803 a problem we have a simple solution for. */
804 SvCUR_set(PL_formtarget,
805 t - SvPVX_const(PL_formtarget));
806 targ_is_utf8 = TRUE;
807 /* Don't need get magic. */
808 sv_utf8_upgrade_flags(PL_formtarget, 0);
809 } else {
810 SvCUR_set(PL_formtarget,
811 t - SvPVX_const(PL_formtarget));
812 }
e8e72d41
NC		 813
814 /* Easy. They agree. */
815 assert (item_is_utf8 == targ_is_utf8);
816 }
817 SvGROW(PL_formtarget,
818 SvCUR(PL_formtarget) + to_copy + fudge + 1);
5a34cab7 819 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
e8e72d41
NC		 820
821 Copy(source, t, to_copy, char);
822 t += to_copy;
823 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
f3f2f1a3 824 if (item_is_utf8) {
e8e72d41
NC		 825 if (SvGMAGICAL(sv)) {
826 /* Mustn't call sv_pos_b2u() as it does a second
827 mg_get(). Is this a bug? Do we need a _flags()
828 variant? */
829 itemsize = utf8_length(source, source + itemsize);
830 } else {
831 sv_pos_b2u(sv, &itemsize);
832 }
833 assert(!tmp);
834 } else if (tmp) {
835 Safefree(tmp);
f3f2f1a3 836 }
a0d0e21e 837 }
5a34cab7 838 break;
a0d0e21e 839 }
a0d0e21e 840
a1b95068
WL		 841 case FF_0DECIMAL:
842 arg = *fpc++;
843#if defined(USE_LONG_DOUBLE)
10edeb5d
JH		 844 fmt = (const char *)
845 ((arg & 256) ?
846 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 847#else
10edeb5d
JH		 848 fmt = (const char *)
849 ((arg & 256) ?
850 "%#0*.*f" : "%0*.*f");
a1b95068
WL		 851#endif
852 goto ff_dec;
a0d0e21e 853 case FF_DECIMAL:
a0d0e21e 854 arg = *fpc++;
65202027 855#if defined(USE_LONG_DOUBLE)
10edeb5d
JH		 856 fmt = (const char *)
857 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 858#else
10edeb5d
JH		 859 fmt = (const char *)
860 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 861#endif
a1b95068 862 ff_dec:
784707d5
JP		 863 /* If the field is marked with ^ and the value is undefined,
864 blank it out. */
784707d5
JP		 865 if ((arg & 512) && !SvOK(sv)) {
866 arg = fieldsize;
867 while (arg--)
868 *t++ = ' ';
869 break;
870 }
871 gotsome = TRUE;
872 value = SvNV(sv);
a1b95068 873 /* overflow evidence */
bfed75c6 874 if (num_overflow(value, fieldsize, arg)) {
a1b95068
WL		 875 arg = fieldsize;
876 while (arg--)
877 *t++ = '#';
878 break;
879 }
784707d5
JP		 880 /* Formats aren't yet marked for locales, so assume "yes". */
881 {
882 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 883 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP		 884 RESTORE_NUMERIC_STANDARD();
885 }
886 t += fieldsize;
887 break;
a1b95068 888
a0d0e21e
LW		 889 case FF_NEWLINE:
890 f++;
891 while (t-- > linemark && *t == ' ') ;
892 t++;
893 *t++ = '\n';
894 break;
895
896 case FF_BLANK:
897 arg = *fpc++;
898 if (gotsome) {
899 if (arg) { /* repeat until fields exhausted? */
900 *t = '\0';
b15aece3 901 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 902 lines += FmLINES(PL_formtarget);
a0d0e21e
LW		 903 if (lines == 200) {
904 arg = t - linemark;
905 if (strnEQ(linemark, linemark - arg, arg))
cea2e8a9 906 DIE(aTHX_ "Runaway format");
a0d0e21e 907 }
1bd51a4c
IH		 908 if (targ_is_utf8)
909 SvUTF8_on(PL_formtarget);
3280af22 910 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW		 911 SP = ORIGMARK;
912 RETURNOP(cLISTOP->op_first);
913 }
914 }
915 else {
916 t = linemark;
917 lines--;
918 }
919 break;
920
921 case FF_MORE:
5a34cab7
NC		 922 {
923 const char *s = chophere;
924 const char *send = item + len;
925 if (chopspace) {
af68e756 926 while (isSPACE(*s) && (s < send))
5a34cab7 927 s++;
a0d0e21e 928 }
5a34cab7
NC		 929 if (s < send) {
930 char *s1;
931 arg = fieldsize - itemsize;
932 if (arg) {
933 fieldsize -= arg;
934 while (arg-- > 0)
935 *t++ = ' ';
936 }
937 s1 = t - 3;
938 if (strnEQ(s1," ",3)) {
939 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
940 s1--;
941 }
942 *s1++ = '.';
943 *s1++ = '.';
944 *s1++ = '.';
a0d0e21e 945 }
5a34cab7 946 break;
a0d0e21e 947 }
a0d0e21e
LW		 948 case FF_END:
949 *t = '\0';
b15aece3 950 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH		 951 if (targ_is_utf8)
952 SvUTF8_on(PL_formtarget);
3280af22 953 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW		 954 SP = ORIGMARK;
955 RETPUSHYES;
956 }
957 }
958}
959
960PP(pp_grepstart)
961{
27da23d5 962 dVAR; dSP;
a0d0e21e
LW		 963 SV *src;
964
3280af22 965 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 966 (void)POPMARK;
54310121 967 if (GIMME_V == G_SCALAR)
6e449a3a 968 mXPUSHi(0);
533c011a 969 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 970 }
3280af22 971 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS		 972 pp_pushmark(); /* push dst */
973 pp_pushmark(); /* push src */
a0d0e21e
LW		 974 ENTER; /* enter outer scope */
975
976 SAVETMPS;
59f00321
RGS		 977 if (PL_op->op_private & OPpGREP_LEX)
978 SAVESPTR(PAD_SVl(PL_op->op_targ));
979 else
980 SAVE_DEFSV;
a0d0e21e 981 ENTER; /* enter inner scope */
7766f137 982 SAVEVPTR(PL_curpm);
a0d0e21e 983
3280af22 984 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 985 SvTEMP_off(src);
59f00321
RGS		 986 if (PL_op->op_private & OPpGREP_LEX)
987 PAD_SVl(PL_op->op_targ) = src;
988 else
989 DEFSV = src;
a0d0e21e
LW		 990
991 PUTBACK;
533c011a 992 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 993 pp_pushmark(); /* push top */
533c011a 994 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW		 995}
996
a0d0e21e
LW		 997PP(pp_mapwhile)
998{
27da23d5 999 dVAR; dSP;
f54cb97a 1000 const I32 gimme = GIMME_V;
544f3153 1001 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW		 1002 I32 count;
1003 I32 shift;
1004 SV** src;
ac27b0f5 1005 SV** dst;
a0d0e21e 1006
544f3153 1007 /* first, move source pointer to the next item in the source list */
3280af22 1008 ++PL_markstack_ptr[-1];
544f3153
GS		 1009
1010 /* if there are new items, push them into the destination list */
4c90a460 1011 if (items && gimme != G_VOID) {
544f3153
GS		 1012 /* might need to make room back there first */
1013 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1014 /* XXX this implementation is very pessimal because the stack
1015 * is repeatedly extended for every set of items. Is possible
1016 * to do this without any stack extension or copying at all
1017 * by maintaining a separate list over which the map iterates
18ef8bea 1018 * (like foreach does). --gsar */
544f3153
GS		 1019
1020 /* everything in the stack after the destination list moves
1021 * towards the end the stack by the amount of room needed */
1022 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1023
1024 /* items to shift up (accounting for the moved source pointer) */
1025 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT		 1026
1027 /* This optimization is by Ben Tilly and it does
1028 * things differently from what Sarathy (gsar)
1029 * is describing. The downside of this optimization is
1030 * that leaves "holes" (uninitialized and hopefully unused areas)
1031 * to the Perl stack, but on the other hand this
1032 * shouldn't be a problem. If Sarathy's idea gets
1033 * implemented, this optimization should become
1034 * irrelevant. --jhi */
1035 if (shift < count)
1036 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1037
924508f0
GS		 1038 EXTEND(SP,shift);
1039 src = SP;
1040 dst = (SP += shift);
3280af22
NIS		 1041 PL_markstack_ptr[-1] += shift;
1042 *PL_markstack_ptr += shift;
544f3153 1043 while (count--)
a0d0e21e
LW		 1044 *dst-- = *src--;
1045 }
544f3153 1046 /* copy the new items down to the destination list */
ac27b0f5 1047 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP		 1048 if (gimme == G_ARRAY) {
1049 while (items-- > 0)
1050 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1051 }
bfed75c6 1052 else {
22023b26
TP		 1053 /* scalar context: we don't care about which values map returns
1054 * (we use undef here). And so we certainly don't want to do mortal
1055 * copies of meaningless values. */
1056 while (items-- > 0) {
b988aa42 1057 (void)POPs;
22023b26
TP		 1058 *dst-- = &PL_sv_undef;
1059 }
1060 }
a0d0e21e
LW		 1061 }
1062 LEAVE; /* exit inner scope */
1063
1064 /* All done yet? */
3280af22 1065 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW		 1066
1067 (void)POPMARK; /* pop top */
1068 LEAVE; /* exit outer scope */
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
1091 ENTER; /* enter inner scope */
7766f137 1092 SAVEVPTR(PL_curpm);
a0d0e21e 1093
544f3153 1094 /* set $_ to the new source item */
3280af22 1095 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1096 SvTEMP_off(src);
59f00321
RGS		 1097 if (PL_op->op_private & OPpGREP_LEX)
1098 PAD_SVl(PL_op->op_targ) = src;
1099 else
1100 DEFSV = src;
a0d0e21e
LW		 1101
1102 RETURNOP(cLOGOP->op_other);
1103 }
1104}
1105
a0d0e21e
LW		 1106/* Range stuff. */
1107
1108PP(pp_range)
1109{
97aff369 1110 dVAR;
a0d0e21e 1111 if (GIMME == G_ARRAY)
1a67a97c 1112 return NORMAL;
538573f7 1113 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1114 return cLOGOP->op_other;
538573f7 1115 else
1a67a97c 1116 return NORMAL;
a0d0e21e
LW		 1117}
1118
1119PP(pp_flip)
1120{
97aff369 1121 dVAR;
39644a26 1122 dSP;
a0d0e21e
LW		 1123
1124 if (GIMME == G_ARRAY) {
1a67a97c 1125 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1126 }
1127 else {
1128 dTOPss;
44f8325f 1129 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1130 int flip = 0;
790090df 1131
bfed75c6 1132 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST		 1133 if (GvIO(PL_last_in_gv)) {
1134 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1135 }
1136 else {
fafc274c 1137 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL		 1138 if (gv && GvSV(gv))
1139 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1140 }
bfed75c6
AL		 1141 } else {
1142 flip = SvTRUE(sv);
1143 }
1144 if (flip) {
a0d0e21e 1145 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1146 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1147 sv_setiv(targ, 1);
3e3baf6d 1148 SETs(targ);
a0d0e21e
LW		 1149 RETURN;
1150 }
1151 else {
1152 sv_setiv(targ, 0);
924508f0 1153 SP--;
1a67a97c 1154 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1155 }
1156 }
76f68e9b 1157 sv_setpvs(TARG, "");
a0d0e21e
LW		 1158 SETs(targ);
1159 RETURN;
1160 }
1161}
1162
8e9bbdb9
RGS		 1163/* This code tries to decide if "$left .. $right" should use the
1164 magical string increment, or if the range is numeric (we make
1165 an exception for .."0" [#18165]). AMS 20021031. */
1166
1167#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS		 1168 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1169 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1170 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1171 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1172 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1173
a0d0e21e
LW		 1174PP(pp_flop)
1175{
97aff369 1176 dVAR; dSP;
a0d0e21e
LW		 1177
1178 if (GIMME == G_ARRAY) {
1179 dPOPPOPssrl;
86cb7173 1180
5b295bef
RD		 1181 SvGETMAGIC(left);
1182 SvGETMAGIC(right);
a0d0e21e 1183
8e9bbdb9 1184 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL		 1185 register IV i, j;
1186 IV max;
4fe3f0fa
MHM		 1187 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1188 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1189 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW		 1190 i = SvIV(left);
1191 max = SvIV(right);
bbce6d69 1192 if (max >= i) {
c1ab3db2
AK		 1193 j = max - i + 1;
1194 EXTEND_MORTAL(j);
1195 EXTEND(SP, j);
bbce6d69 1196 }
c1ab3db2
AK		 1197 else
1198 j = 0;
1199 while (j--) {
901017d6 1200 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW		 1201 PUSHs(sv);
1202 }
1203 }
1204 else {
44f8325f 1205 SV * const final = sv_mortalcopy(right);
13c5b33c 1206 STRLEN len;
823a54a3 1207 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1208
901017d6 1209 SV *sv = sv_mortalcopy(left);
13c5b33c 1210 SvPV_force_nolen(sv);
89ea2908 1211 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1212 XPUSHs(sv);
b15aece3 1213 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1214 break;
a0d0e21e
LW		 1215 sv = sv_2mortal(newSVsv(sv));
1216 sv_inc(sv);
1217 }
a0d0e21e
LW		 1218 }
1219 }
1220 else {
1221 dTOPss;
901017d6 1222 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1223 int flop = 0;
a0d0e21e 1224 sv_inc(targ);
4e3399f9
YST		 1225
1226 if (PL_op->op_private & OPpFLIP_LINENUM) {
1227 if (GvIO(PL_last_in_gv)) {
1228 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1229 }
1230 else {
fafc274c 1231 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST		 1232 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1233 }
1234 }
1235 else {
1236 flop = SvTRUE(sv);
1237 }
1238
1239 if (flop) {
a0d0e21e 1240 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1241 sv_catpvs(targ, "E0");
a0d0e21e
LW		 1242 }
1243 SETs(targ);
1244 }
1245
1246 RETURN;
1247}
1248
1249/* Control. */
1250
27da23d5 1251static const char * const context_name[] = {
515afda2 1252 "pseudo-block",
76753e7f
NC		 1253 "when",
1254 NULL, /* CXt_BLOCK never actually needs "block" */
1255 "given",
1256 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1257 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1258 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1259 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1260 "subroutine",
76753e7f 1261 "format",
515afda2 1262 "eval",
515afda2 1263 "substitution",
515afda2
NC		 1264};
1265
76e3520e 1266STATIC I32
06b5626a 1267S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1268{
97aff369 1269 dVAR;
a0d0e21e 1270 register I32 i;
a0d0e21e 1271
7918f24d
NC		 1272 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1273
a0d0e21e 1274 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1275 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1276 switch (CxTYPE(cx)) {
a0d0e21e 1277 case CXt_SUBST:
a0d0e21e 1278 case CXt_SUB:
7766f137 1279 case CXt_FORMAT:
a0d0e21e 1280 case CXt_EVAL:
0a753a76 1281 case CXt_NULL:
0d863452
RH		 1282 case CXt_GIVEN:
1283 case CXt_WHEN:
e476b1b5 1284 if (ckWARN(WARN_EXITING))
515afda2
NC		 1285 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1286 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1287 if (CxTYPE(cx) == CXt_NULL)
1288 return -1;
1289 break;
c6fdafd0 1290 case CXt_LOOP_LAZYIV:
d01136d6 1291 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1292 case CXt_LOOP_FOR:
1293 case CXt_LOOP_PLAIN:
a61a7064 1294 if ( !CxLABEL(cx) || strNE(label, CxLABEL(cx)) ) {
cea2e8a9 1295 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
a61a7064 1296 (long)i, CxLABEL(cx)));
a0d0e21e
LW		 1297 continue;
1298 }
cea2e8a9 1299 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW		 1300 return i;
1301 }
1302 }
1303 return i;
1304}
1305
0d863452
RH		 1306
1307
e50aee73 1308I32
864dbfa3 1309Perl_dowantarray(pTHX)
e50aee73 1310{
97aff369 1311 dVAR;
f54cb97a 1312 const I32 gimme = block_gimme();
54310121 1313 return (gimme == G_VOID) ? G_SCALAR : gimme;
1314}
1315
1316I32
864dbfa3 1317Perl_block_gimme(pTHX)
54310121 1318{
97aff369 1319 dVAR;
06b5626a 1320 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1321 if (cxix < 0)
46fc3d4c 1322 return G_VOID;
e50aee73 1323
54310121 1324 switch (cxstack[cxix].blk_gimme) {
d2719217
GS		 1325 case G_VOID:
1326 return G_VOID;
54310121 1327 case G_SCALAR:
e50aee73 1328 return G_SCALAR;
54310121 1329 case G_ARRAY:
1330 return G_ARRAY;
1331 default:
cea2e8a9 1332 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS		 1333 /* NOTREACHED */
1334 return 0;
54310121 1335 }
e50aee73
AD		 1336}
1337
78f9721b
SM		 1338I32
1339Perl_is_lvalue_sub(pTHX)
1340{
97aff369 1341 dVAR;
06b5626a 1342 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM		 1343 assert(cxix >= 0); /* We should only be called from inside subs */
1344
bafb2adc
NC		 1345 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1346 return CxLVAL(cxstack + cxix);
78f9721b
SM		 1347 else
1348 return 0;
1349}
1350
76e3520e 1351STATIC I32
901017d6 1352S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1353{
97aff369 1354 dVAR;
a0d0e21e 1355 I32 i;
7918f24d
NC		 1356
1357 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1358
a0d0e21e 1359 for (i = startingblock; i >= 0; i--) {
901017d6 1360 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1361 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1362 default:
1363 continue;
1364 case CXt_EVAL:
1365 case CXt_SUB:
7766f137 1366 case CXt_FORMAT:
cea2e8a9 1367 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW		 1368 return i;
1369 }
1370 }
1371 return i;
1372}
1373
76e3520e 1374STATIC I32
cea2e8a9 1375S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1376{
97aff369 1377 dVAR;
a0d0e21e 1378 I32 i;
a0d0e21e 1379 for (i = startingblock; i >= 0; i--) {
06b5626a 1380 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1381 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1382 default:
1383 continue;
1384 case CXt_EVAL:
cea2e8a9 1385 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW		 1386 return i;
1387 }
1388 }
1389 return i;
1390}
1391
76e3520e 1392STATIC I32
cea2e8a9 1393S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1394{
97aff369 1395 dVAR;
a0d0e21e 1396 I32 i;
a0d0e21e 1397 for (i = startingblock; i >= 0; i--) {
901017d6 1398 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1399 switch (CxTYPE(cx)) {
a0d0e21e 1400 case CXt_SUBST:
a0d0e21e 1401 case CXt_SUB:
7766f137 1402 case CXt_FORMAT:
a0d0e21e 1403 case CXt_EVAL:
0a753a76 1404 case CXt_NULL:
e476b1b5 1405 if (ckWARN(WARN_EXITING))
515afda2
NC		 1406 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1407 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1408 if ((CxTYPE(cx)) == CXt_NULL)
1409 return -1;
1410 break;
c6fdafd0 1411 case CXt_LOOP_LAZYIV:
d01136d6 1412 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1413 case CXt_LOOP_FOR:
1414 case CXt_LOOP_PLAIN:
cea2e8a9 1415 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW		 1416 return i;
1417 }
1418 }
1419 return i;
1420}
1421
0d863452
RH		 1422STATIC I32
1423S_dopoptogiven(pTHX_ I32 startingblock)
1424{
97aff369 1425 dVAR;
0d863452
RH		 1426 I32 i;
1427 for (i = startingblock; i >= 0; i--) {
1428 register const PERL_CONTEXT *cx = &cxstack[i];
1429 switch (CxTYPE(cx)) {
1430 default:
1431 continue;
1432 case CXt_GIVEN:
1433 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1434 return i;
3b719c58
NC		 1435 case CXt_LOOP_PLAIN:
1436 assert(!CxFOREACHDEF(cx));
1437 break;
c6fdafd0 1438 case CXt_LOOP_LAZYIV:
d01136d6 1439 case CXt_LOOP_LAZYSV:
3b719c58 1440 case CXt_LOOP_FOR:
0d863452
RH		 1441 if (CxFOREACHDEF(cx)) {
1442 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1443 return i;
1444 }
1445 }
1446 }
1447 return i;
1448}
1449
1450STATIC I32
1451S_dopoptowhen(pTHX_ I32 startingblock)
1452{
97aff369 1453 dVAR;
0d863452
RH		 1454 I32 i;
1455 for (i = startingblock; i >= 0; i--) {
1456 register const PERL_CONTEXT *cx = &cxstack[i];
1457 switch (CxTYPE(cx)) {
1458 default:
1459 continue;
1460 case CXt_WHEN:
1461 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1462 return i;
1463 }
1464 }
1465 return i;
1466}
1467
a0d0e21e 1468void
864dbfa3 1469Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1470{
97aff369 1471 dVAR;
a0d0e21e
LW		 1472 I32 optype;
1473
1474 while (cxstack_ix > cxix) {
b0d9ce38 1475 SV *sv;
06b5626a 1476 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1477 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1478 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1479 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1480 switch (CxTYPE(cx)) {
c90c0ff4 1481 case CXt_SUBST:
1482 POPSUBST(cx);
1483 continue; /* not break */
a0d0e21e 1484 case CXt_SUB:
b0d9ce38
GS		 1485 POPSUB(cx,sv);
1486 LEAVESUB(sv);
a0d0e21e
LW		 1487 break;
1488 case CXt_EVAL:
1489 POPEVAL(cx);
1490 break;
c6fdafd0 1491 case CXt_LOOP_LAZYIV:
d01136d6 1492 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1493 case CXt_LOOP_FOR:
1494 case CXt_LOOP_PLAIN:
a0d0e21e
LW		 1495 POPLOOP(cx);
1496 break;
0a753a76 1497 case CXt_NULL:
a0d0e21e 1498 break;
7766f137
GS		 1499 case CXt_FORMAT:
1500 POPFORMAT(cx);
1501 break;
a0d0e21e 1502 }
c90c0ff4 1503 cxstack_ix--;
a0d0e21e 1504 }
1b6737cc 1505 PERL_UNUSED_VAR(optype);
a0d0e21e
LW		 1506}
1507
5a844595
GS		 1508void
1509Perl_qerror(pTHX_ SV *err)
1510{
97aff369 1511 dVAR;
7918f24d
NC		 1512
1513 PERL_ARGS_ASSERT_QERROR;
1514
5a844595
GS		 1515 if (PL_in_eval)
1516 sv_catsv(ERRSV, err);
1517 else if (PL_errors)
1518 sv_catsv(PL_errors, err);
1519 else
be2597df 1520 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM		 1521 if (PL_parser)
1522 ++PL_parser->error_count;
5a844595
GS		 1523}
1524
a0d0e21e 1525OP *
35a4481c 1526Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1527{
27da23d5 1528 dVAR;
87582a92 1529
3280af22 1530 if (PL_in_eval) {
a0d0e21e 1531 I32 cxix;
a0d0e21e 1532 I32 gimme;
a0d0e21e 1533
4e6ea2c3 1534 if (message) {
faef0170 1535 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1536 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1537 SV * const err = ERRSV;
c445ea15 1538 const char *e = NULL;
98eae8f5 1539 if (!SvPOK(err))
76f68e9b 1540 sv_setpvs(err,"");
98eae8f5 1541 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1542 STRLEN len;
349d4f2f 1543 e = SvPV_const(err, len);
0510663f 1544 e += len - msglen;
98eae8f5 1545 if (*e != *message || strNE(e,message))
c445ea15 1546 e = NULL;
98eae8f5
GS		 1547 }
1548 if (!e) {
1549 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1550 sv_catpvn(err, prefix, sizeof(prefix)-1);
1551 sv_catpvn(err, message, msglen);
e476b1b5 1552 if (ckWARN(WARN_MISC)) {
504618e9 1553 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
f1f66076
RGS		 1554 Perl_warner(aTHX_ packWARN(WARN_MISC), "%s",
1555 SvPVX_const(err)+start);
4e6ea2c3 1556 }
4633a7c4 1557 }
4633a7c4 1558 }
1aa99e6b 1559 else {
06bf62c7 1560 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1561 }
4633a7c4 1562 }
4e6ea2c3 1563
5a844595
GS		 1564 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1565 && PL_curstackinfo->si_prev)
1566 {
bac4b2ad 1567 dounwind(-1);
d3acc0f7 1568 POPSTACK;
bac4b2ad 1569 }
e336de0d 1570
a0d0e21e
LW		 1571 if (cxix >= 0) {
1572 I32 optype;
35a4481c 1573 register PERL_CONTEXT *cx;
901017d6 1574 SV **newsp;
a0d0e21e
LW		 1575
1576 if (cxix < cxstack_ix)
1577 dounwind(cxix);
1578
3280af22 1579 POPBLOCK(cx,PL_curpm);
6b35e009 1580 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1581 if (!message)
349d4f2f 1582 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1583 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1584 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW		 1585 my_exit(1);
1586 }
1587 POPEVAL(cx);
1588
1589 if (gimme == G_SCALAR)
3280af22
NIS		 1590 *++newsp = &PL_sv_undef;
1591 PL_stack_sp = newsp;
a0d0e21e
LW		 1592
1593 LEAVE;
748a9306 1594
7fb6a879
GS		 1595 /* LEAVE could clobber PL_curcop (see save_re_context())
1596 * XXX it might be better to find a way to avoid messing with
1597 * PL_curcop in save_re_context() instead, but this is a more
1598 * minimal fix --GSAR */
1599 PL_curcop = cx->blk_oldcop;
1600
7a2e2cd6 1601 if (optype == OP_REQUIRE) {
44f8325f 1602 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1603 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1604 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1605 &PL_sv_undef, 0);
5a844595
GS		 1606 DIE(aTHX_ "%sCompilation failed in require",
1607 *msg ? msg : "Unknown error\n");
7a2e2cd6 1608 }
f39bc417
DM		 1609 assert(CxTYPE(cx) == CXt_EVAL);
1610 return cx->blk_eval.retop;
a0d0e21e
LW		 1611 }
1612 }
9cc2fdd3 1613 if (!message)
349d4f2f 1614 message = SvPVx_const(ERRSV, msglen);
87582a92 1615
7ff03255 1616 write_to_stderr(message, msglen);
f86702cc 1617 my_failure_exit();
1618 /* NOTREACHED */
a0d0e21e
LW		 1619 return 0;
1620}
1621
1622PP(pp_xor)
1623{
97aff369 1624 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW		 1625 if (SvTRUE(left) != SvTRUE(right))
1626 RETSETYES;
1627 else
1628 RETSETNO;
1629}
1630
a0d0e21e
LW		 1631PP(pp_caller)
1632{
97aff369 1633 dVAR;
39644a26 1634 dSP;
a0d0e21e 1635 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL		 1636 register const PERL_CONTEXT *cx;
1637 register const PERL_CONTEXT *ccstack = cxstack;
1638 const PERL_SI *top_si = PL_curstackinfo;
54310121 1639 I32 gimme;
06b5626a 1640 const char *stashname;
a0d0e21e
LW		 1641 I32 count = 0;
1642
1643 if (MAXARG)
1644 count = POPi;
27d41816 1645
a0d0e21e 1646 for (;;) {
2c375eb9
GS		 1647 /* we may be in a higher stacklevel, so dig down deeper */
1648 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1649 top_si = top_si->si_prev;
1650 ccstack = top_si->si_cxstack;
1651 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1652 }
a0d0e21e 1653 if (cxix < 0) {
27d41816
DM		 1654 if (GIMME != G_ARRAY) {
1655 EXTEND(SP, 1);
a0d0e21e 1656 RETPUSHUNDEF;
27d41816 1657 }
a0d0e21e
LW		 1658 RETURN;
1659 }
f2a7f298
DG		 1660 /* caller() should not report the automatic calls to &DB::sub */
1661 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1662 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW		 1663 count++;
1664 if (!count--)
1665 break;
2c375eb9 1666 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1667 }
2c375eb9
GS		 1668
1669 cx = &ccstack[cxix];
7766f137 1670 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1671 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1672 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1673 field below is defined for any cx. */
f2a7f298
DG		 1674 /* caller() should not report the automatic calls to &DB::sub */
1675 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1676 cx = &ccstack[dbcxix];
06a5b730 1677 }
1678
ed094faf 1679 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1680 if (GIMME != G_ARRAY) {
27d41816 1681 EXTEND(SP, 1);
ed094faf 1682 if (!stashname)
3280af22 1683 PUSHs(&PL_sv_undef);
49d8d3a1
MB		 1684 else {
1685 dTARGET;
ed094faf 1686 sv_setpv(TARG, stashname);
49d8d3a1
MB		 1687 PUSHs(TARG);
1688 }
a0d0e21e
LW		 1689 RETURN;
1690 }
a0d0e21e 1691
b3ca2e83 1692 EXTEND(SP, 11);
27d41816 1693
ed094faf 1694 if (!stashname)
3280af22 1695 PUSHs(&PL_sv_undef);
49d8d3a1 1696 else
6e449a3a
MHM		 1697 mPUSHs(newSVpv(stashname, 0));
1698 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1699 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW		 1700 if (!MAXARG)
1701 RETURN;
7766f137 1702 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1703 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1704 /* So is ccstack[dbcxix]. */
07b8c804 1705 if (isGV(cvgv)) {
561b68a9 1706 SV * const sv = newSV(0);
c445ea15 1707 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1708 mPUSHs(sv);
bf38a478 1709 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS		 1710 }
1711 else {
84bafc02 1712 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1713 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1714 }
a0d0e21e
LW		 1715 }
1716 else {
84bafc02 1717 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1718 mPUSHi(0);
a0d0e21e 1719 }
54310121 1720 gimme = (I32)cx->blk_gimme;
1721 if (gimme == G_VOID)
3280af22 1722 PUSHs(&PL_sv_undef);
54310121 1723 else
98625aca 1724 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1725 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1726 /* eval STRING */
85a64632 1727 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1728 PUSHs(cx->blk_eval.cur_text);
3280af22 1729 PUSHs(&PL_sv_no);
0f79a09d 1730 }
811a4de9 1731 /* require */
0f79a09d 1732 else if (cx->blk_eval.old_namesv) {
6e449a3a 1733 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1734 PUSHs(&PL_sv_yes);
06a5b730 1735 }
811a4de9
GS		 1736 /* eval BLOCK (try blocks have old_namesv == 0) */
1737 else {
1738 PUSHs(&PL_sv_undef);
1739 PUSHs(&PL_sv_undef);
1740 }
4633a7c4 1741 }
a682de96
GS		 1742 else {
1743 PUSHs(&PL_sv_undef);
1744 PUSHs(&PL_sv_undef);
1745 }
bafb2adc 1746 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1747 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1748 {
66a1b24b
AL		 1749 AV * const ary = cx->blk_sub.argarray;
1750 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1751
3280af22 1752 if (!PL_dbargs) {
71315bf2 1753 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1754 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1755 GvMULTI_on(tmpgv);
3ddcf04c 1756 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW		 1757 }
1758
3280af22
NIS		 1759 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1760 av_extend(PL_dbargs, AvFILLp(ary) + off);
1761 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1762 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1763 }
f3aa04c2
GS		 1764 /* XXX only hints propagated via op_private are currently
1765 * visible (others are not easily accessible, since they
1766 * use the global PL_hints) */
6e449a3a 1767 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS		 1768 {
1769 SV * mask ;
72dc9ed5 1770 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1771
ac27b0f5 1772 if (old_warnings == pWARN_NONE ||
114bafba 1773 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1774 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1775 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS		 1776 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1777 /* Get the bit mask for $warnings::Bits{all}, because
1778 * it could have been extended by warnings::register */
1779 SV **bits_all;
0bd48802 1780 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1781 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS		 1782 mask = newSVsv(*bits_all);
1783 }
1784 else {
1785 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1786 }
1787 }
e476b1b5 1788 else
72dc9ed5 1789 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1790 mPUSHs(mask);
e476b1b5 1791 }
b3ca2e83 1792
c28fe1ec 1793 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1794 sv_2mortal(newRV_noinc(
ad64d0ec
NC		 1795 MUTABLE_SV(Perl_refcounted_he_chain_2hv(aTHX_
1796 cx->blk_oldcop->cop_hints_hash))))
b3ca2e83 1797 : &PL_sv_undef);
a0d0e21e
LW		 1798 RETURN;
1799}
1800
a0d0e21e
LW		 1801PP(pp_reset)
1802{
97aff369 1803 dVAR;
39644a26 1804 dSP;
10edeb5d 1805 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1806 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1807 PUSHs(&PL_sv_yes);
a0d0e21e
LW		 1808 RETURN;
1809}
1810
dd2155a4
DM		 1811/* like pp_nextstate, but used instead when the debugger is active */
1812
a0d0e21e
LW		 1813PP(pp_dbstate)
1814{
27da23d5 1815 dVAR;
533c011a 1816 PL_curcop = (COP*)PL_op;
a0d0e21e 1817 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1818 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW		 1819 FREETMPS;
1820
5df8de69
DM		 1821 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1822 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1823 {
39644a26 1824 dSP;
c09156bb 1825 register PERL_CONTEXT *cx;
f54cb97a 1826 const I32 gimme = G_ARRAY;
eb160463 1827 U8 hasargs;
0bd48802
AL		 1828 GV * const gv = PL_DBgv;
1829 register CV * const cv = GvCV(gv);
a0d0e21e 1830
a0d0e21e 1831 if (!cv)
cea2e8a9 1832 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1833
aea4f609
DM		 1834 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1835 /* don't do recursive DB::DB call */
a0d0e21e 1836 return NORMAL;
748a9306 1837
4633a7c4
LW		 1838 ENTER;
1839 SAVETMPS;
1840
3280af22 1841 SAVEI32(PL_debug);
55497cff 1842 SAVESTACK_POS();
3280af22 1843 PL_debug = 0;
748a9306 1844 hasargs = 0;
924508f0 1845 SPAGAIN;
748a9306 1846
aed2304a 1847 if (CvISXSUB(cv)) {
c127bd3a
SF		 1848 CvDEPTH(cv)++;
1849 PUSHMARK(SP);
1850 (void)(*CvXSUB(cv))(aTHX_ cv);
1851 CvDEPTH(cv)--;
1852 FREETMPS;
1853 LEAVE;
1854 return NORMAL;
1855 }
1856 else {
1857 PUSHBLOCK(cx, CXt_SUB, SP);
1858 PUSHSUB_DB(cx);
1859 cx->blk_sub.retop = PL_op->op_next;
1860 CvDEPTH(cv)++;
1861 SAVECOMPPAD();
1862 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1863 RETURNOP(CvSTART(cv));
1864 }
a0d0e21e
LW		 1865 }
1866 else
1867 return NORMAL;
1868}
1869
a0d0e21e
LW		 1870PP(pp_enteriter)
1871{
27da23d5 1872 dVAR; dSP; dMARK;
c09156bb 1873 register PERL_CONTEXT *cx;
f54cb97a 1874 const I32 gimme = GIMME_V;
a0d0e21e 1875 SV **svp;
840fe433 1876 U8 cxtype = CXt_LOOP_FOR;
7766f137 1877#ifdef USE_ITHREADS
e846cb92 1878 PAD *iterdata;
7766f137 1879#endif
a0d0e21e 1880
4633a7c4
LW		 1881 ENTER;
1882 SAVETMPS;
1883
533c011a 1884 if (PL_op->op_targ) {
14f338dc
DM		 1885 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1886 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1887 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1888 SVs_PADSTALE, SVs_PADSTALE);
1889 }
09edbca0 1890 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
c3564e5c 1891#ifndef USE_ITHREADS
dd2155a4 1892 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
c3564e5c 1893#else
e846cb92 1894 iterdata = NULL;
7766f137 1895#endif
54b9620d
MB		 1896 }
1897 else {
159b6efe 1898 GV * const gv = MUTABLE_GV(POPs);
7766f137 1899 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1900 SAVEGENERICSV(*svp);
561b68a9 1901 *svp = newSV(0);
7766f137 1902#ifdef USE_ITHREADS
e846cb92 1903 iterdata = (PAD*)gv;
7766f137 1904#endif
54b9620d 1905 }
4633a7c4 1906
0d863452
RH		 1907 if (PL_op->op_private & OPpITER_DEF)
1908 cxtype |= CXp_FOR_DEF;
1909
a0d0e21e
LW		 1910 ENTER;
1911
7766f137
GS		 1912 PUSHBLOCK(cx, cxtype, SP);
1913#ifdef USE_ITHREADS
e846cb92 1914 PUSHLOOP_FOR(cx, iterdata, MARK, PL_op->op_targ);
7766f137 1915#else
52d1f6fb 1916 PUSHLOOP_FOR(cx, svp, MARK, 0);
7766f137 1917#endif
533c011a 1918 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS		 1919 SV *maybe_ary = POPs;
1920 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 1921 dPOPss;
d01136d6 1922 SV * const right = maybe_ary;
984a4bea
RD		 1923 SvGETMAGIC(sv);
1924 SvGETMAGIC(right);
4fe3f0fa 1925 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 1926 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC		 1927 cx->cx_type |= CXt_LOOP_LAZYIV;
1928 /* Make sure that no-one re-orders cop.h and breaks our
1929 assumptions */
1930 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040
JH		 1931#ifdef NV_PRESERVES_UV
1932 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1933 (SvNV(sv) > (NV)IV_MAX)))
1934 ||
1935 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1936 (SvNV(right) < (NV)IV_MIN))))
1937#else
1938 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1939 ||
1940 ((SvNV(sv) > 0) &&
1941 ((SvUV(sv) > (UV)IV_MAX) ||
1942 (SvNV(sv) > (NV)UV_MAX)))))
1943 ||
1944 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1945 ||
1946 ((SvNV(right) > 0) &&
1947 ((SvUV(right) > (UV)IV_MAX) ||
1948 (SvNV(right) > (NV)UV_MAX))))))
1949#endif
076d9a11 1950 DIE(aTHX_ "Range iterator outside integer range");
d01136d6
BS		 1951 cx->blk_loop.state_u.lazyiv.cur = SvIV(sv);
1952 cx->blk_loop.state_u.lazyiv.end = SvIV(right);
d4665a05
DM		 1953#ifdef DEBUGGING
1954 /* for correct -Dstv display */
1955 cx->blk_oldsp = sp - PL_stack_base;
1956#endif
89ea2908 1957 }
3f63a782 1958 else {
d01136d6
BS		 1959 cx->cx_type &= ~CXTYPEMASK;
1960 cx->cx_type |= CXt_LOOP_LAZYSV;
1961 /* Make sure that no-one re-orders cop.h and breaks our
1962 assumptions */
1963 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
1964 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
1965 cx->blk_loop.state_u.lazysv.end = right;
1966 SvREFCNT_inc(right);
1967 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC		 1968 /* This will do the upgrade to SVt_PV, and warn if the value
1969 is uninitialised. */
10516c54 1970 (void) SvPV_nolen_const(right);
267cc4a8
NC		 1971 /* Doing this avoids a check every time in pp_iter in pp_hot.c
1972 to replace !SvOK() with a pointer to "". */
1973 if (!SvOK(right)) {
1974 SvREFCNT_dec(right);
d01136d6 1975 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 1976 }
3f63a782 1977 }
89ea2908 1978 }
d01136d6 1979 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 1980 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS		 1981 SvREFCNT_inc(maybe_ary);
1982 cx->blk_loop.state_u.ary.ix =
1983 (PL_op->op_private & OPpITER_REVERSED) ?
1984 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
1985 -1;
ef3e5ea9 1986 }
89ea2908 1987 }
d01136d6
BS		 1988 else { /* iterating over items on the stack */
1989 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 1990 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 1991 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC		 1992 }
1993 else {
d01136d6 1994 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 1995 }
4633a7c4 1996 }
a0d0e21e
LW		 1997
1998 RETURN;
1999}
2000
2001PP(pp_enterloop)
2002{
27da23d5 2003 dVAR; dSP;
c09156bb 2004 register PERL_CONTEXT *cx;
f54cb97a 2005 const I32 gimme = GIMME_V;
a0d0e21e
LW		 2006
2007 ENTER;
2008 SAVETMPS;
2009 ENTER;
2010
3b719c58
NC		 2011 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2012 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW		 2013
2014 RETURN;
2015}
2016
2017PP(pp_leaveloop)
2018{
27da23d5 2019 dVAR; dSP;
c09156bb 2020 register PERL_CONTEXT *cx;
a0d0e21e
LW		 2021 I32 gimme;
2022 SV **newsp;
2023 PMOP *newpm;
2024 SV **mark;
2025
2026 POPBLOCK(cx,newpm);
3b719c58 2027 assert(CxTYPE_is_LOOP(cx));
4fdae800 2028 mark = newsp;
a8bba7fa 2029 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2030
a1f49e72 2031 TAINT_NOT;
54310121 2032 if (gimme == G_VOID)
6f207bd3 2033 NOOP;
54310121 2034 else if (gimme == G_SCALAR) {
2035 if (mark < SP)
2036 *++newsp = sv_mortalcopy(*SP);
2037 else
3280af22 2038 *++newsp = &PL_sv_undef;
a0d0e21e
LW		 2039 }
2040 else {
a1f49e72 2041 while (mark < SP) {
a0d0e21e 2042 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS		 2043 TAINT_NOT; /* Each item is independent */
2044 }
a0d0e21e 2045 }
f86702cc 2046 SP = newsp;
2047 PUTBACK;
2048
a8bba7fa 2049 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2050 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2051
a0d0e21e
LW		 2052 LEAVE;
2053 LEAVE;
2054
f86702cc 2055 return NORMAL;
a0d0e21e
LW		 2056}
2057
2058PP(pp_return)
2059{
27da23d5 2060 dVAR; dSP; dMARK;
c09156bb 2061 register PERL_CONTEXT *cx;
f86702cc 2062 bool popsub2 = FALSE;
b45de488 2063 bool clear_errsv = FALSE;
a0d0e21e
LW		 2064 I32 gimme;
2065 SV **newsp;
2066 PMOP *newpm;
2067 I32 optype = 0;
b0d9ce38 2068 SV *sv;
f39bc417 2069 OP *retop;
a0d0e21e 2070
0bd48802
AL		 2071 const I32 cxix = dopoptosub(cxstack_ix);
2072
9850bf21
RH		 2073 if (cxix < 0) {
2074 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2075 * sort block, which is a CXt_NULL
2076 * not a CXt_SUB */
2077 dounwind(0);
d7507f74
RH		 2078 PL_stack_base[1] = *PL_stack_sp;
2079 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW		 2080 return 0;
2081 }
9850bf21
RH		 2082 else
2083 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2084 }
a0d0e21e
LW		 2085 if (cxix < cxstack_ix)
2086 dounwind(cxix);
2087
d7507f74
RH		 2088 if (CxMULTICALL(&cxstack[cxix])) {
2089 gimme = cxstack[cxix].blk_gimme;
2090 if (gimme == G_VOID)
2091 PL_stack_sp = PL_stack_base;
2092 else if (gimme == G_SCALAR) {
2093 PL_stack_base[1] = *PL_stack_sp;
2094 PL_stack_sp = PL_stack_base + 1;
2095 }
9850bf21 2096 return 0;
d7507f74 2097 }
9850bf21 2098
a0d0e21e 2099 POPBLOCK(cx,newpm);
6b35e009 2100 switch (CxTYPE(cx)) {
a0d0e21e 2101 case CXt_SUB:
f86702cc 2102 popsub2 = TRUE;
f39bc417 2103 retop = cx->blk_sub.retop;
5dd42e15 2104 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW		 2105 break;
2106 case CXt_EVAL:
b45de488
GS		 2107 if (!(PL_in_eval & EVAL_KEEPERR))
2108 clear_errsv = TRUE;
a0d0e21e 2109 POPEVAL(cx);
f39bc417 2110 retop = cx->blk_eval.retop;
1d76a5c3
GS		 2111 if (CxTRYBLOCK(cx))
2112 break;
067f92a0 2113 lex_end();
748a9306
LW		 2114 if (optype == OP_REQUIRE &&
2115 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2116 {
54310121 2117 /* Unassume the success we assumed earlier. */
901017d6 2118 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2119 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2120 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2121 }
a0d0e21e 2122 break;
7766f137
GS		 2123 case CXt_FORMAT:
2124 POPFORMAT(cx);
f39bc417 2125 retop = cx->blk_sub.retop;
7766f137 2126 break;
a0d0e21e 2127 default:
cea2e8a9 2128 DIE(aTHX_ "panic: return");
a0d0e21e
LW		 2129 }
2130
a1f49e72 2131 TAINT_NOT;
a0d0e21e 2132 if (gimme == G_SCALAR) {
a29cdaf0
IZ		 2133 if (MARK < SP) {
2134 if (popsub2) {
a8bba7fa 2135 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ		 2136 if (SvTEMP(TOPs)) {
2137 *++newsp = SvREFCNT_inc(*SP);
2138 FREETMPS;
2139 sv_2mortal(*newsp);
959e3673
GS		 2140 }
2141 else {
2142 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2143 FREETMPS;
959e3673
GS		 2144 *++newsp = sv_mortalcopy(sv);
2145 SvREFCNT_dec(sv);
a29cdaf0 2146 }
959e3673
GS		 2147 }
2148 else
a29cdaf0 2149 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS		 2150 }
2151 else
a29cdaf0 2152 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2153 }
2154 else
3280af22 2155 *++newsp = &PL_sv_undef;
a0d0e21e 2156 }
54310121 2157 else if (gimme == G_ARRAY) {
a1f49e72 2158 while (++MARK <= SP) {
f86702cc 2159 *++newsp = (popsub2 && SvTEMP(*MARK))
2160 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2161 TAINT_NOT; /* Each item is independent */
2162 }
a0d0e21e 2163 }
3280af22 2164 PL_stack_sp = newsp;
a0d0e21e 2165
5dd42e15 2166 LEAVE;
f86702cc 2167 /* Stack values are safe: */
2168 if (popsub2) {
5dd42e15 2169 cxstack_ix--;
b0d9ce38 2170 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2171 }
b0d9ce38 2172 else
c445ea15 2173 sv = NULL;
3280af22 2174 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2175
b0d9ce38 2176 LEAVESUB(sv);
8433848b 2177 if (clear_errsv) {
ab69dbc2 2178 CLEAR_ERRSV();
8433848b 2179 }
f39bc417 2180 return retop;
a0d0e21e
LW		 2181}
2182
2183PP(pp_last)
2184{
27da23d5 2185 dVAR; dSP;
a0d0e21e 2186 I32 cxix;
c09156bb 2187 register PERL_CONTEXT *cx;
f86702cc 2188 I32 pop2 = 0;
a0d0e21e 2189 I32 gimme;
8772537c 2190 I32 optype;
a0d0e21e
LW		 2191 OP *nextop;
2192 SV **newsp;
2193 PMOP *newpm;
a8bba7fa 2194 SV **mark;
c445ea15 2195 SV *sv = NULL;
9d4ba2ae 2196
a0d0e21e 2197
533c011a 2198 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2199 cxix = dopoptoloop(cxstack_ix);
2200 if (cxix < 0)
a651a37d 2201 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW		 2202 }
2203 else {
2204 cxix = dopoptolabel(cPVOP->op_pv);
2205 if (cxix < 0)
cea2e8a9 2206 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2207 }
2208 if (cxix < cxstack_ix)
2209 dounwind(cxix);
2210
2211 POPBLOCK(cx,newpm);
5dd42e15 2212 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2213 mark = newsp;
6b35e009 2214 switch (CxTYPE(cx)) {
c6fdafd0 2215 case CXt_LOOP_LAZYIV:
d01136d6 2216 case CXt_LOOP_LAZYSV:
3b719c58
NC		 2217 case CXt_LOOP_FOR:
2218 case CXt_LOOP_PLAIN:
2219 pop2 = CxTYPE(cx);
a8bba7fa 2220 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2221 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2222 break;
f86702cc 2223 case CXt_SUB:
f86702cc 2224 pop2 = CXt_SUB;
f39bc417 2225 nextop = cx->blk_sub.retop;
a0d0e21e 2226 break;
f86702cc 2227 case CXt_EVAL:
2228 POPEVAL(cx);
f39bc417 2229 nextop = cx->blk_eval.retop;
a0d0e21e 2230 break;
7766f137
GS		 2231 case CXt_FORMAT:
2232 POPFORMAT(cx);
f39bc417 2233 nextop = cx->blk_sub.retop;
7766f137 2234 break;
a0d0e21e 2235 default:
cea2e8a9 2236 DIE(aTHX_ "panic: last");
a0d0e21e
LW		 2237 }
2238
a1f49e72 2239 TAINT_NOT;
a0d0e21e 2240 if (gimme == G_SCALAR) {
f86702cc 2241 if (MARK < SP)
2242 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2243 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2244 else
3280af22 2245 *++newsp = &PL_sv_undef;
a0d0e21e 2246 }
54310121 2247 else if (gimme == G_ARRAY) {
a1f49e72 2248 while (++MARK <= SP) {
f86702cc 2249 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2250 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2251 TAINT_NOT; /* Each item is independent */
2252 }
f86702cc 2253 }
2254 SP = newsp;
2255 PUTBACK;
2256
5dd42e15
DM		 2257 LEAVE;
2258 cxstack_ix--;
f86702cc 2259 /* Stack values are safe: */
2260 switch (pop2) {
c6fdafd0 2261 case CXt_LOOP_LAZYIV:
3b719c58 2262 case CXt_LOOP_PLAIN:
d01136d6 2263 case CXt_LOOP_LAZYSV:
3b719c58 2264 case CXt_LOOP_FOR:
a8bba7fa 2265 POPLOOP(cx); /* release loop vars ... */
4fdae800 2266 LEAVE;
f86702cc 2267 break;
2268 case CXt_SUB:
b0d9ce38 2269 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2270 break;
a0d0e21e 2271 }
3280af22 2272 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2273
b0d9ce38 2274 LEAVESUB(sv);
9d4ba2ae
AL		 2275 PERL_UNUSED_VAR(optype);
2276 PERL_UNUSED_VAR(gimme);
f86702cc 2277 return nextop;
a0d0e21e
LW		 2278}
2279
2280PP(pp_next)
2281{
27da23d5 2282 dVAR;
a0d0e21e 2283 I32 cxix;
c09156bb 2284 register PERL_CONTEXT *cx;
85538317 2285 I32 inner;
a0d0e21e 2286
533c011a 2287 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2288 cxix = dopoptoloop(cxstack_ix);
2289 if (cxix < 0)
a651a37d 2290 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW		 2291 }
2292 else {
2293 cxix = dopoptolabel(cPVOP->op_pv);
2294 if (cxix < 0)
cea2e8a9 2295 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2296 }
2297 if (cxix < cxstack_ix)
2298 dounwind(cxix);
2299
85538317
GS		 2300 /* clear off anything above the scope we're re-entering, but
2301 * save the rest until after a possible continue block */
2302 inner = PL_scopestack_ix;
1ba6ee2b 2303 TOPBLOCK(cx);
85538317
GS		 2304 if (PL_scopestack_ix < inner)
2305 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2306 PL_curcop = cx->blk_oldcop;
022eaa24 2307 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW		 2308}
2309
2310PP(pp_redo)
2311{
27da23d5 2312 dVAR;
a0d0e21e 2313 I32 cxix;
c09156bb 2314 register PERL_CONTEXT *cx;
a0d0e21e 2315 I32 oldsave;
a034e688 2316 OP* redo_op;
a0d0e21e 2317
533c011a 2318 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2319 cxix = dopoptoloop(cxstack_ix);
2320 if (cxix < 0)
a651a37d 2321 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW		 2322 }
2323 else {
2324 cxix = dopoptolabel(cPVOP->op_pv);
2325 if (cxix < 0)
cea2e8a9 2326 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2327 }
2328 if (cxix < cxstack_ix)
2329 dounwind(cxix);
2330
022eaa24 2331 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM		 2332 if (redo_op->op_type == OP_ENTER) {
2333 /* pop one less context to avoid $x being freed in while (my $x..) */
2334 cxstack_ix++;
2335 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2336 redo_op = redo_op->op_next;
2337 }
2338
a0d0e21e 2339 TOPBLOCK(cx);
3280af22 2340 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2341 LEAVE_SCOPE(oldsave);
936c78b5 2342 FREETMPS;
3a1b2b9e 2343 PL_curcop = cx->blk_oldcop;
a034e688 2344 return redo_op;
a0d0e21e
LW		 2345}
2346
0824fdcb 2347STATIC OP *
bfed75c6 2348S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2349{
97aff369 2350 dVAR;
a0d0e21e 2351 OP **ops = opstack;
bfed75c6 2352 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2353
7918f24d
NC		 2354 PERL_ARGS_ASSERT_DOFINDLABEL;
2355
fc36a67e 2356 if (ops >= oplimit)
cea2e8a9 2357 Perl_croak(aTHX_ too_deep);
11343788
MB		 2358 if (o->op_type == OP_LEAVE ||
2359 o->op_type == OP_SCOPE ||
2360 o->op_type == OP_LEAVELOOP ||
33d34e4c 2361 o->op_type == OP_LEAVESUB ||
11343788 2362 o->op_type == OP_LEAVETRY)
fc36a67e 2363 {
5dc0d613 2364 *ops++ = cUNOPo->op_first;
fc36a67e 2365 if (ops >= oplimit)
cea2e8a9 2366 Perl_croak(aTHX_ too_deep);
fc36a67e 2367 }
c4aa4e48 2368 *ops = 0;
11343788 2369 if (o->op_flags & OPf_KIDS) {
aec46f14 2370 OP *kid;
a0d0e21e 2371 /* First try all the kids at this level, since that's likeliest. */
11343788 2372 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48 2373 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
4b65a919 2374 CopLABEL(kCOP) && strEQ(CopLABEL(kCOP), label))
a0d0e21e
LW		 2375 return kid;
2376 }
11343788 2377 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2378 if (kid == PL_lastgotoprobe)
a0d0e21e 2379 continue;
ed8d0fe2
SM		 2380 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2381 if (ops == opstack)
2382 *ops++ = kid;
2383 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2384 ops[-1]->op_type == OP_DBSTATE)
2385 ops[-1] = kid;
2386 else
2387 *ops++ = kid;
2388 }
155aba94 2389 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2390 return o;
a0d0e21e
LW		 2391 }
2392 }
c4aa4e48 2393 *ops = 0;
a0d0e21e
LW		 2394 return 0;
2395}
2396
a0d0e21e
LW		 2397PP(pp_goto)
2398{
27da23d5 2399 dVAR; dSP;
cbbf8932 2400 OP *retop = NULL;
a0d0e21e 2401 I32 ix;
c09156bb 2402 register PERL_CONTEXT *cx;
fc36a67e 2403#define GOTO_DEPTH 64
2404 OP *enterops[GOTO_DEPTH];
cbbf8932 2405 const char *label = NULL;
bfed75c6
AL		 2406 const bool do_dump = (PL_op->op_type == OP_DUMP);
2407 static const char must_have_label[] = "goto must have label";
a0d0e21e 2408
533c011a 2409 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2410 SV * const sv = POPs;
a0d0e21e
LW		 2411
2412 /* This egregious kludge implements goto &subroutine */
2413 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2414 I32 cxix;
c09156bb 2415 register PERL_CONTEXT *cx;
ea726b52 2416 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW		 2417 SV** mark;
2418 I32 items = 0;
2419 I32 oldsave;
b1464ded 2420 bool reified = 0;
a0d0e21e 2421
e8f7dd13 2422 retry:
4aa0a1f7 2423 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2424 const GV * const gv = CvGV(cv);
e8f7dd13 2425 if (gv) {
7fc63493 2426 GV *autogv;
e8f7dd13
GS		 2427 SV *tmpstr;
2428 /* autoloaded stub? */
2429 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2430 goto retry;
2431 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2432 GvNAMELEN(gv), FALSE);
2433 if (autogv && (cv = GvCV(autogv)))
2434 goto retry;
2435 tmpstr = sv_newmortal();
c445ea15 2436 gv_efullname3(tmpstr, gv, NULL);
be2597df 2437 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2438 }
cea2e8a9 2439 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD		 2440 }
2441
a0d0e21e 2442 /* First do some returnish stuff. */
b37c2d43 2443 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2444 FREETMPS;
a0d0e21e
LW		 2445 cxix = dopoptosub(cxstack_ix);
2446 if (cxix < 0)
cea2e8a9 2447 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW		 2448 if (cxix < cxstack_ix)
2449 dounwind(cxix);
2450 TOPBLOCK(cx);
2d43a17f 2451 SPAGAIN;
564abe23 2452 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2453 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM		 2454 if (CxREALEVAL(cx))
2455 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2456 else
2457 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2458 }
9850bf21
RH		 2459 else if (CxMULTICALL(cx))
2460 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2461 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2462 /* put @_ back onto stack */
a0d0e21e 2463 AV* av = cx->blk_sub.argarray;
bfed75c6 2464
93965878 2465 items = AvFILLp(av) + 1;
a45cdc79
DM		 2466 EXTEND(SP, items+1); /* @_ could have been extended. */
2467 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS		 2468 SvREFCNT_dec(GvAV(PL_defgv));
2469 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2470 CLEAR_ARGARRAY(av);
d8b46c1b 2471 /* abandon @_ if it got reified */
62b1ebc2 2472 if (AvREAL(av)) {
b1464ded
DM		 2473 reified = 1;
2474 SvREFCNT_dec(av);
d8b46c1b
GS		 2475 av = newAV();
2476 av_extend(av, items-1);
11ca45c0 2477 AvREIFY_only(av);
ad64d0ec 2478 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2479 }
a0d0e21e 2480 }
aed2304a 2481 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2482 AV* const av = GvAV(PL_defgv);
1fa4e549 2483 items = AvFILLp(av) + 1;
a45cdc79
DM		 2484 EXTEND(SP, items+1); /* @_ could have been extended. */
2485 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2486 }
a45cdc79
DM		 2487 mark = SP;
2488 SP += items;
6b35e009 2489 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2490 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2491 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2492 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW		 2493 LEAVE_SCOPE(oldsave);
2494
2495 /* Now do some callish stuff. */
2496 SAVETMPS;
5023d17a 2497 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2498 if (CvISXSUB(cv)) {
b37c2d43 2499 OP* const retop = cx->blk_sub.retop;
f73ef291
NC		 2500 SV **newsp;
2501 I32 gimme;
b1464ded
DM		 2502 if (reified) {
2503 I32 index;
2504 for (index=0; index<items; index++)
2505 sv_2mortal(SP[-index]);
2506 }
1fa4e549 2507
b37c2d43
AL		 2508 /* XS subs don't have a CxSUB, so pop it */
2509 POPBLOCK(cx, PL_curpm);
2510 /* Push a mark for the start of arglist */
2511 PUSHMARK(mark);
2512 PUTBACK;
2513 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2514 LEAVE;
5eff7df7 2515 return retop;
a0d0e21e
LW		 2516 }
2517 else {
b37c2d43 2518 AV* const padlist = CvPADLIST(cv);
6b35e009 2519 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2520 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2521 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2522 cx->cx_type = CXt_SUB;
b150fb22 2523 }
a0d0e21e 2524 cx->blk_sub.cv = cv;
1a5b3db4 2525 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2526
a0d0e21e
LW		 2527 CvDEPTH(cv)++;
2528 if (CvDEPTH(cv) < 2)
74c765eb 2529 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2530 else {
2b9dff67 2531 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2532 sub_crush_depth(cv);
26019298 2533 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2534 }
fd617465
DM		 2535 SAVECOMPPAD();
2536 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2537 if (CxHASARGS(cx))
6d4ff0d2 2538 {
502c6561 2539 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2540
3280af22 2541 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2542 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2543 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2544 cx->blk_sub.argarray = av;
a0d0e21e
LW		 2545
2546 if (items >= AvMAX(av) + 1) {
b37c2d43 2547 SV **ary = AvALLOC(av);
a0d0e21e
LW		 2548 if (AvARRAY(av) != ary) {
2549 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2550 AvARRAY(av) = ary;
a0d0e21e
LW		 2551 }
2552 if (items >= AvMAX(av) + 1) {
2553 AvMAX(av) = items - 1;
2554 Renew(ary,items+1,SV*);
2555 AvALLOC(av) = ary;
9c6bc640 2556 AvARRAY(av) = ary;
a0d0e21e
LW		 2557 }
2558 }
a45cdc79 2559 ++mark;
a0d0e21e 2560 Copy(mark,AvARRAY(av),items,SV*);
93965878 2561 AvFILLp(av) = items - 1;
d8b46c1b 2562 assert(!AvREAL(av));
b1464ded
DM		 2563 if (reified) {
2564 /* transfer 'ownership' of refcnts to new @_ */
2565 AvREAL_on(av);
2566 AvREIFY_off(av);
2567 }
a0d0e21e
LW		 2568 while (items--) {
2569 if (*mark)
2570 SvTEMP_off(*mark);
2571 mark++;
2572 }
2573 }
491527d0 2574 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2575 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL		 2576 if (PERLDB_GOTO) {
2577 CV * const gotocv = get_cv("DB::goto", FALSE);
2578 if (gotocv) {
2579 PUSHMARK( PL_stack_sp );
ad64d0ec 2580 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL		 2581 PL_stack_sp--;
2582 }
491527d0 2583 }
1ce6579f 2584 }
a0d0e21e
LW		 2585 RETURNOP(CvSTART(cv));
2586 }
2587 }
1614b0e3 2588 else {
0510663f 2589 label = SvPV_nolen_const(sv);
1614b0e3 2590 if (!(do_dump || *label))
cea2e8a9 2591 DIE(aTHX_ must_have_label);
1614b0e3 2592 }
a0d0e21e 2593 }
533c011a 2594 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2595 if (! do_dump)
cea2e8a9 2596 DIE(aTHX_ must_have_label);
a0d0e21e
LW		 2597 }
2598 else
2599 label = cPVOP->op_pv;
2600
2601 if (label && *label) {
cbbf8932 2602 OP *gotoprobe = NULL;
3b2447bc 2603 bool leaving_eval = FALSE;
33d34e4c 2604 bool in_block = FALSE;
cbbf8932 2605 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW		 2606
2607 /* find label */
2608
d4c19fe8 2609 PL_lastgotoprobe = NULL;
a0d0e21e
LW		 2610 *enterops = 0;
2611 for (ix = cxstack_ix; ix >= 0; ix--) {
2612 cx = &cxstack[ix];
6b35e009 2613 switch (CxTYPE(cx)) {
a0d0e21e 2614 case CXt_EVAL:
3b2447bc 2615 leaving_eval = TRUE;
971ecbe6 2616 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH		 2617 gotoprobe = (last_eval_cx ?
2618 last_eval_cx->blk_eval.old_eval_root :
2619 PL_eval_root);
2620 last_eval_cx = cx;
9c5794fe
RH		 2621 break;
2622 }
2623 /* else fall through */
c6fdafd0 2624 case CXt_LOOP_LAZYIV:
d01136d6 2625 case CXt_LOOP_LAZYSV:
3b719c58
NC		 2626 case CXt_LOOP_FOR:
2627 case CXt_LOOP_PLAIN:
a0d0e21e
LW		 2628 gotoprobe = cx->blk_oldcop->op_sibling;
2629 break;
2630 case CXt_SUBST:
2631 continue;
2632 case CXt_BLOCK:
33d34e4c 2633 if (ix) {
a0d0e21e 2634 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE		 2635 in_block = TRUE;
2636 } else
3280af22 2637 gotoprobe = PL_main_root;
a0d0e21e 2638 break;
b3933176 2639 case CXt_SUB:
9850bf21 2640 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS		 2641 gotoprobe = CvROOT(cx->blk_sub.cv);
2642 break;
2643 }
2644 /* FALL THROUGH */
7766f137 2645 case CXt_FORMAT:
0a753a76 2646 case CXt_NULL:
a651a37d 2647 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW		 2648 default:
2649 if (ix)
cea2e8a9 2650 DIE(aTHX_ "panic: goto");
3280af22 2651 gotoprobe = PL_main_root;
a0d0e21e
LW		 2652 break;
2653 }
2b597662
GS		 2654 if (gotoprobe) {
2655 retop = dofindlabel(gotoprobe, label,
2656 enterops, enterops + GOTO_DEPTH);
2657 if (retop)
2658 break;
2659 }
3280af22 2660 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW		 2661 }
2662 if (!retop)
cea2e8a9 2663 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2664
3b2447bc
RH		 2665 /* if we're leaving an eval, check before we pop any frames
2666 that we're not going to punt, otherwise the error
2667 won't be caught */
2668
2669 if (leaving_eval && *enterops && enterops[1]) {
2670 I32 i;
2671 for (i = 1; enterops[i]; i++)
2672 if (enterops[i]->op_type == OP_ENTERITER)
2673 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2674 }
2675
a0d0e21e
LW		 2676 /* pop unwanted frames */
2677
2678 if (ix < cxstack_ix) {
2679 I32 oldsave;
2680
2681 if (ix < 0)
2682 ix = 0;
2683 dounwind(ix);
2684 TOPBLOCK(cx);
3280af22 2685 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW		 2686 LEAVE_SCOPE(oldsave);
2687 }
2688
2689 /* push wanted frames */
2690
748a9306 2691 if (*enterops && enterops[1]) {
0bd48802 2692 OP * const oldop = PL_op;
33d34e4c
AE		 2693 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2694 for (; enterops[ix]; ix++) {
533c011a 2695 PL_op = enterops[ix];
84902520
TB		 2696 /* Eventually we may want to stack the needed arguments
2697 * for each op. For now, we punt on the hard ones. */
533c011a 2698 if (PL_op->op_type == OP_ENTERITER)
894356b3 2699 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2700 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2701 }
533c011a 2702 PL_op = oldop;
a0d0e21e
LW		 2703 }
2704 }
2705
2706 if (do_dump) {
a5f75d66 2707#ifdef VMS
6b88bc9c 2708 if (!retop) retop = PL_main_start;
a5f75d66 2709#endif
3280af22
NIS		 2710 PL_restartop = retop;
2711 PL_do_undump = TRUE;
a0d0e21e
LW		 2712
2713 my_unexec();
2714
3280af22
NIS		 2715 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2716 PL_do_undump = FALSE;
a0d0e21e
LW		 2717 }
2718
2719 RETURNOP(retop);
2720}
2721
2722PP(pp_exit)
2723{
97aff369 2724 dVAR;
39644a26 2725 dSP;
a0d0e21e
LW		 2726 I32 anum;
2727
2728 if (MAXARG < 1)
2729 anum = 0;
ff0cee69 2730 else {
a0d0e21e 2731 anum = SvIVx(POPs);
d98f61e7
GS		 2732#ifdef VMS
2733 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2734 anum = 0;
96e176bf 2735 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69 2736#endif
2737 }
cc3604b1 2738 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC		 2739#ifdef PERL_MAD
2740 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2741 if (anum || !(PL_minus_c && PL_madskills))
2742 my_exit(anum);
2743#else
a0d0e21e 2744 my_exit(anum);
81d86705 2745#endif
3280af22 2746 PUSHs(&PL_sv_undef);
a0d0e21e
LW		 2747 RETURN;
2748}
2749
a0d0e21e
LW		 2750/* Eval. */
2751
0824fdcb 2752STATIC void
cea2e8a9 2753S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2754{
504618e9 2755 const char *s = SvPVX_const(sv);
890ce7af 2756 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2757 I32 line = 1;
a0d0e21e 2758
7918f24d
NC		 2759 PERL_ARGS_ASSERT_SAVE_LINES;
2760
a0d0e21e 2761 while (s && s < send) {
f54cb97a 2762 const char *t;
b9f83d2f 2763 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2764
a0d0e21e
LW		 2765 t = strchr(s, '\n');
2766 if (t)
2767 t++;
2768 else
2769 t = send;
2770
2771 sv_setpvn(tmpstr, s, t - s);
2772 av_store(array, line++, tmpstr);
2773 s = t;
2774 }
2775}
2776
0824fdcb 2777STATIC OP *
cea2e8a9 2778S_docatch(pTHX_ OP *o)
1e422769 2779{
97aff369 2780 dVAR;
6224f72b 2781 int ret;
06b5626a 2782 OP * const oldop = PL_op;
db36c5a1 2783 dJMPENV;
1e422769 2784
1e422769 2785#ifdef DEBUGGING
54310121 2786 assert(CATCH_GET == TRUE);
1e422769 2787#endif
312caa8e 2788 PL_op = o;
8bffa5f8 2789
14dd3ad8 2790 JMPENV_PUSH(ret);
6224f72b 2791 switch (ret) {
312caa8e 2792 case 0:
abd70938
DM		 2793 assert(cxstack_ix >= 0);
2794 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2795 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2796 redo_body:
85aaa934 2797 CALLRUNOPS(aTHX);
312caa8e
CS		 2798 break;
2799 case 3:
8bffa5f8 2800 /* die caught by an inner eval - continue inner loop */
abd70938
DM		 2801
2802 /* NB XXX we rely on the old popped CxEVAL still being at the top
2803 * of the stack; the way die_where() currently works, this
2804 * assumption is valid. In theory The cur_top_env value should be
2805 * returned in another global, the way retop (aka PL_restartop)
2806 * is. */
2807 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2808
2809 if (PL_restartop
2810 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2811 {
312caa8e
CS		 2812 PL_op = PL_restartop;
2813 PL_restartop = 0;
2814 goto redo_body;
2815 }
2816 /* FALL THROUGH */
2817 default:
14dd3ad8 2818 JMPENV_POP;
533c011a 2819 PL_op = oldop;
6224f72b 2820 JMPENV_JUMP(ret);
1e422769 2821 /* NOTREACHED */
1e422769 2822 }
14dd3ad8 2823 JMPENV_POP;
533c011a 2824 PL_op = oldop;
5f66b61c 2825 return NULL;
1e422769 2826}
2827
c277df42 2828OP *
bfed75c6 2829Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ		 2830/* sv Text to convert to OP tree. */
2831/* startop op_free() this to undo. */
2832/* code Short string id of the caller. */
2833{
f7997f86 2834 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2835 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ		 2836 PERL_CONTEXT *cx;
2837 SV **newsp;
b094c71d 2838 I32 gimme = G_VOID;
c277df42
IZ		 2839 I32 optype;
2840 OP dummy;
83ee9e09
GS		 2841 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2842 char *tmpbuf = tbuf;
c277df42 2843 char *safestr;
a3985cdc 2844 int runtime;
601f1833 2845 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2846 STRLEN len;
c277df42 2847
7918f24d
NC		 2848 PERL_ARGS_ASSERT_SV_COMPILE_2OP;
2849
c277df42 2850 ENTER;
5486870f 2851 lex_start(sv, NULL, FALSE);
c277df42
IZ		 2852 SAVETMPS;
2853 /* switch to eval mode */
2854
923e4eb5 2855 if (IN_PERL_COMPILETIME) {
f4dd75d9 2856 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2857 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2858 }
83ee9e09 2859 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2860 SV * const sv = sv_newmortal();
83ee9e09
GS		 2861 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2862 code, (unsigned long)++PL_evalseq,
2863 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2864 tmpbuf = SvPVX(sv);
fc009855 2865 len = SvCUR(sv);
83ee9e09
GS		 2866 }
2867 else
d9fad198
JH		 2868 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2869 (unsigned long)++PL_evalseq);
f4dd75d9 2870 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2871 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2872 SAVECOPLINE(&PL_compiling);
57843af0 2873 CopLINE_set(&PL_compiling, 1);
c277df42
IZ		 2874 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2875 deleting the eval's FILEGV from the stash before gv_check() runs
2876 (i.e. before run-time proper). To work around the coredump that
2877 ensues, we always turn GvMULTI_on for any globals that were
2878 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC		 2879 safestr = savepvn(tmpbuf, len);
2880 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2881 SAVEHINTS();
d1ca3daa 2882#ifdef OP_IN_REGISTER
6b88bc9c 2883 PL_opsave = op;
d1ca3daa 2884#else
7766f137 2885 SAVEVPTR(PL_op);
d1ca3daa 2886#endif
c277df42 2887
a3985cdc 2888 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2889 runtime = IN_PERL_RUNTIME;
a3985cdc 2890 if (runtime)
d819b83a 2891 runcv = find_runcv(NULL);
a3985cdc 2892
533c011a 2893 PL_op = &dummy;
13b51b79 2894 PL_op->op_type = OP_ENTEREVAL;
533c011a 2895 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2896 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 2897 PUSHEVAL(cx, 0);
a3985cdc
DM		 2898
2899 if (runtime)
410be5db 2900 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2901 else
410be5db 2902 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2903 POPBLOCK(cx,PL_curpm);
e84b9f1f 2904 POPEVAL(cx);
c277df42
IZ		 2905
2906 (*startop)->op_type = OP_NULL;
22c35a8c 2907 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2908 lex_end();
f3548bdc 2909 /* XXX DAPM do this properly one year */
502c6561 2910 *padp = MUTABLE_AV(SvREFCNT_inc_simple(PL_comppad));
c277df42 2911 LEAVE;
923e4eb5 2912 if (IN_PERL_COMPILETIME)
623e6609 2913 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2914#ifdef OP_IN_REGISTER
6b88bc9c 2915 op = PL_opsave;
d1ca3daa 2916#endif
9d4ba2ae
AL		 2917 PERL_UNUSED_VAR(newsp);
2918 PERL_UNUSED_VAR(optype);
2919
410be5db 2920 return PL_eval_start;
c277df42
IZ		 2921}
2922
a3985cdc
DM		 2923
2924/*
2925=for apidoc find_runcv
2926
2927Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM		 2928If db_seqp is non_null, skip CVs that are in the DB package and populate
2929*db_seqp with the cop sequence number at the point that the DB:: code was
2930entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2931than in the scope of the debugger itself).
a3985cdc
DM		 2932
2933=cut
2934*/
2935
2936CV*
d819b83a 2937Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2938{
97aff369 2939 dVAR;
a3985cdc 2940 PERL_SI *si;
a3985cdc 2941
d819b83a
DM		 2942 if (db_seqp)
2943 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2944 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2945 I32 ix;
a3985cdc 2946 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2947 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2948 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2949 CV * const cv = cx->blk_sub.cv;
d819b83a
DM		 2950 /* skip DB:: code */
2951 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2952 *db_seqp = cx->blk_oldcop->cop_seq;
2953 continue;
2954 }
2955 return cv;
2956 }
a3985cdc
DM		 2957 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2958 return PL_compcv;
2959 }
2960 }
2961 return PL_main_cv;
2962}
2963
2964
2965/* Compile a require/do, an eval '', or a /(?{...})/.
2966 * In the last case, startop is non-null, and contains the address of
2967 * a pointer that should be set to the just-compiled code.
2968 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM		 2969 * Returns a bool indicating whether the compile was successful; if so,
2970 * PL_eval_start contains the first op of the compiled ocde; otherwise,
2971 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM		 2972 */
2973
410be5db 2974STATIC bool
a3985cdc 2975S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2976{
27da23d5 2977 dVAR; dSP;
46c461b5 2978 OP * const saveop = PL_op;
a0d0e21e 2979
6dc8a9e4
IZ		 2980 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2981 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2982 : EVAL_INEVAL);
a0d0e21e 2983
1ce6579f 2984 PUSHMARK(SP);
2985
3280af22 2986 SAVESPTR(PL_compcv);
ea726b52 2987 PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
1aff0e91 2988 CvEVAL_on(PL_compcv);
2090ab20
JH		 2989 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2990 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2991
a3985cdc 2992 CvOUTSIDE_SEQ(PL_compcv) = seq;
ea726b52 2993 CvOUTSIDE(PL_compcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 2994
dd2155a4 2995 /* set up a scratch pad */
a0d0e21e 2996
dd2155a4 2997 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2998 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2999
07055b4c 3000
81d86705
NC		 3001 if (!PL_madskills)
3002 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 3003
a0d0e21e
LW		 3004 /* make sure we compile in the right package */
3005
ed094faf 3006 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 3007 SAVESPTR(PL_curstash);
ed094faf 3008 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 3009 }
3c10abe3 3010 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS		 3011 SAVESPTR(PL_beginav);
3012 PL_beginav = newAV();
3013 SAVEFREESV(PL_beginav);
3c10abe3
AG		 3014 SAVESPTR(PL_unitcheckav);
3015 PL_unitcheckav = newAV();
3016 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3017
81d86705 3018#ifdef PERL_MAD
9da243ce 3019 SAVEBOOL(PL_madskills);
81d86705
NC		 3020 PL_madskills = 0;
3021#endif
3022
a0d0e21e
LW		 3023 /* try to compile it */
3024
5f66b61c 3025 PL_eval_root = NULL;
3280af22 3026 PL_curcop = &PL_compiling;
fc15ae8f 3027 CopARYBASE_set(PL_curcop, 0);
5f66b61c 3028 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3029 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS		 3030 else
3031 CLEAR_ERRSV();
13765c85 3032 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 3033 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 3034 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 3035 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 3036 const char *msg;
bfed75c6 3037
533c011a 3038 PL_op = saveop;
3280af22
NIS		 3039 if (PL_eval_root) {
3040 op_free(PL_eval_root);
5f66b61c 3041 PL_eval_root = NULL;
a0d0e21e 3042 }
3280af22 3043 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 3044 if (!startop) {
3280af22 3045 POPBLOCK(cx,PL_curpm);
c277df42 3046 POPEVAL(cx);
c277df42 3047 }
a0d0e21e
LW		 3048 lex_end();
3049 LEAVE;
9d4ba2ae
AL		 3050
3051 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 3052 if (optype == OP_REQUIRE) {
b464bac0 3053 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 3054 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 3055 &PL_sv_undef, 0);
58d3fd3b
SH		 3056 Perl_croak(aTHX_ "%sCompilation failed in require",
3057 *msg ? msg : "Unknown error\n");
5a844595
GS		 3058 }
3059 else if (startop) {
3280af22 3060 POPBLOCK(cx,PL_curpm);
c277df42 3061 POPEVAL(cx);
5a844595
GS		 3062 Perl_croak(aTHX_ "%sCompilation failed in regexp",
3063 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 3064 }
9d7f88dd 3065 else {
9d7f88dd 3066 if (!*msg) {
6502358f 3067 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR		 3068 }
3069 }
9d4ba2ae 3070 PERL_UNUSED_VAR(newsp);
410be5db
DM		 3071 PUSHs(&PL_sv_undef);
3072 PUTBACK;
3073 return FALSE;
a0d0e21e 3074 }
57843af0 3075 CopLINE_set(&PL_compiling, 0);
c277df42 3076 if (startop) {
3280af22 3077 *startop = PL_eval_root;
c277df42 3078 } else
3280af22 3079 SAVEFREEOP(PL_eval_root);
0c58d367
RGS		 3080
3081 /* Set the context for this new optree.
3082 * If the last op is an OP_REQUIRE, force scalar context.
3083 * Otherwise, propagate the context from the eval(). */
3084 if (PL_eval_root->op_type == OP_LEAVEEVAL
3085 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
3086 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
3087 == OP_REQUIRE)
3088 scalar(PL_eval_root);
7df0357e 3089 else if ((gimme & G_WANT) == G_VOID)
3280af22 3090 scalarvoid(PL_eval_root);
7df0357e 3091 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3092 list(PL_eval_root);
a0d0e21e 3093 else
3280af22 3094 scalar(PL_eval_root);
a0d0e21e
LW		 3095
3096 DEBUG_x(dump_eval());
3097
55497cff 3098 /* Register with debugger: */
6482a30d 3099 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 3100 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff 3101 if (cv) {
3102 dSP;
924508f0 3103 PUSHMARK(SP);
ad64d0ec 3104 XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling)));
55497cff 3105 PUTBACK;
ad64d0ec 3106 call_sv(MUTABLE_SV(cv), G_DISCARD);
55497cff 3107 }
3108 }
3109
3c10abe3
AG		 3110 if (PL_unitcheckav)
3111 call_list(PL_scopestack_ix, PL_unitcheckav);
3112
a0d0e21e
LW		 3113 /* compiled okay, so do it */
3114
3280af22
NIS		 3115 CvDEPTH(PL_compcv) = 1;
3116 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3117 PL_op = saveop; /* The caller may need it. */
bc177e6b 3118 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3119
410be5db
DM		 3120 PUTBACK;
3121 return TRUE;
a0d0e21e
LW		 3122}
3123
a6c40364 3124STATIC PerlIO *
0786552a 3125S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP		 3126{
3127 Stat_t st;
c445ea15 3128 const int st_rc = PerlLIO_stat(name, &st);
df528165 3129
7918f24d
NC		 3130 PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN;
3131
6b845e56 3132 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3133 return NULL;
ce8abf5f
SP		 3134 }
3135
0786552a 3136 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP		 3137}
3138
75c20bac 3139#ifndef PERL_DISABLE_PMC
ce8abf5f 3140STATIC PerlIO *
0786552a 3141S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3142{
b295d113
TH		 3143 PerlIO *fp;
3144
7918f24d
NC		 3145 PERL_ARGS_ASSERT_DOOPEN_PM;
3146
ce9440c8 3147 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC		 3148 SV *const pmcsv = newSV(namelen + 2);
3149 char *const pmc = SvPVX(pmcsv);
a6c40364 3150 Stat_t pmcstat;
50b8ed39
NC		 3151
3152 memcpy(pmc, name, namelen);
3153 pmc[namelen] = 'c';
3154 pmc[namelen + 1] = '\0';
3155
a6c40364 3156 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3157 fp = check_type_and_open(name);
a6c40364
GS		 3158 }
3159 else {
0786552a 3160 fp = check_type_and_open(pmc);
b295d113 3161 }
a6c40364
GS		 3162 SvREFCNT_dec(pmcsv);
3163 }
3164 else {
0786552a 3165 fp = check_type_and_open(name);
b295d113 3166 }
b295d113 3167 return fp;
75c20bac 3168}
7925835c 3169#else
75c20bac 3170# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3171#endif /* !PERL_DISABLE_PMC */
b295d113 3172
a0d0e21e
LW		 3173PP(pp_require)
3174{
27da23d5 3175 dVAR; dSP;
c09156bb 3176 register PERL_CONTEXT *cx;
a0d0e21e 3177 SV *sv;
5c144d81 3178 const char *name;
6132ea6c 3179 STRLEN len;
4492be7a
JM		 3180 char * unixname;
3181 STRLEN unixlen;
62f5ad7a 3182#ifdef VMS
4492be7a 3183 int vms_unixname = 0;
62f5ad7a 3184#endif
c445ea15
AL		 3185 const char *tryname = NULL;
3186 SV *namesv = NULL;
f54cb97a 3187 const I32 gimme = GIMME_V;
bbed91b5 3188 int filter_has_file = 0;
c445ea15 3189 PerlIO *tryrsfp = NULL;
34113e50 3190 SV *filter_cache = NULL;
c445ea15
AL		 3191 SV *filter_state = NULL;
3192 SV *filter_sub = NULL;
3193 SV *hook_sv = NULL;
6ec9efec
JH		 3194 SV *encoding;
3195 OP *op;
a0d0e21e
LW		 3196
3197 sv = POPs;
d7aa5382 3198 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP		 3199 sv = new_version(sv);
3200 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3201 upg_version(PL_patchlevel, TRUE);
149c1637 3202 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3203 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3204 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3205 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS		 3206 }
3207 else {
d1029faa
JP		 3208 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3209 I32 first = 0;
3210 AV *lav;
3211 SV * const req = SvRV(sv);
85fbaab2 3212 SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE);
d1029faa
JP		 3213
3214 /* get the left hand term */
502c6561 3215 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE)));
d1029faa
JP		 3216
3217 first = SvIV(*av_fetch(lav,0,0));
3218 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
85fbaab2 3219 || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
d1029faa
JP		 3220 || av_len(lav) > 1 /* FP with > 3 digits */
3221 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3222 ) {
3223 DIE(aTHX_ "Perl %"SVf" required--this is only "
3224 "%"SVf", stopped", SVfARG(vnormal(req)),
3225 SVfARG(vnormal(PL_patchlevel)));
3226 }
3227 else { /* probably 'use 5.10' or 'use 5.8' */
3228 SV * hintsv = newSV(0);
3229 I32 second = 0;
3230
3231 if (av_len(lav)>=1)
3232 second = SvIV(*av_fetch(lav,1,0));
3233
3234 second /= second >= 600 ? 100 : 10;
3235 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.%d",
3236 (int)first, (int)second,0);
3237 upg_version(hintsv, TRUE);
3238
3239 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3240 "--this is only %"SVf", stopped",
3241 SVfARG(vnormal(req)),
3242 SVfARG(vnormal(hintsv)),
3243 SVfARG(vnormal(PL_patchlevel)));
3244 }
3245 }
468aa647 3246 }
d7aa5382 3247
fbc891ce
RB		 3248 /* We do this only with use, not require. */
3249 if (PL_compcv &&
fbc891ce
RB		 3250 /* If we request a version >= 5.9.5, load feature.pm with the
3251 * feature bundle that corresponds to the required version. */
2e8342de 3252 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS		 3253 SV *const importsv = vnormal(sv);
3254 *SvPVX_mutable(importsv) = ':';
3255 ENTER;
3256 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3257 LEAVE;
3258 }
3259
3260 RETPUSHYES;
a0d0e21e 3261 }
5c144d81 3262 name = SvPV_const(sv, len);
6132ea6c 3263 if (!(name && len > 0 && *name))
cea2e8a9 3264 DIE(aTHX_ "Null filename used");
4633a7c4 3265 TAINT_PROPER("require");
4492be7a
JM		 3266
3267
3268#ifdef VMS
3269 /* The key in the %ENV hash is in the syntax of file passed as the argument
3270 * usually this is in UNIX format, but sometimes in VMS format, which
3271 * can result in a module being pulled in more than once.
3272 * To prevent this, the key must be stored in UNIX format if the VMS
3273 * name can be translated to UNIX.
3274 */
3275 if ((unixname = tounixspec(name, NULL)) != NULL) {
3276 unixlen = strlen(unixname);
3277 vms_unixname = 1;
3278 }
3279 else
3280#endif
3281 {
3282 /* if not VMS or VMS name can not be translated to UNIX, pass it
3283 * through.
3284 */
3285 unixname = (char *) name;
3286 unixlen = len;
3287 }
44f8325f 3288 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM		 3289 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3290 unixname, unixlen, 0);
44f8325f
AL		 3291 if ( svp ) {
3292 if (*svp != &PL_sv_undef)
3293 RETPUSHYES;
3294 else
087b5369
RD		 3295 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3296 "Compilation failed in require", unixname);
44f8325f 3297 }
4d8b06f1 3298 }
a0d0e21e
LW		 3299
3300 /* prepare to compile file */
3301
be4b629d 3302 if (path_is_absolute(name)) {
46fc3d4c 3303 tryname = name;
0786552a 3304 tryrsfp = doopen_pm(name, len);
bf4acbe4 3305 }
67627c52
JH		 3306#ifdef MACOS_TRADITIONAL
3307 if (!tryrsfp) {
3308 char newname[256];
3309
3310 MacPerl_CanonDir(name, newname, 1);
3311 if (path_is_absolute(newname)) {
3312 tryname = newname;
0786552a 3313 tryrsfp = doopen_pm(newname, strlen(newname));
67627c52
JH		 3314 }
3315 }
3316#endif
be4b629d 3317 if (!tryrsfp) {
44f8325f 3318 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3319 I32 i;
748a9306 3320#ifdef VMS
4492be7a 3321 if (vms_unixname)
46fc3d4c 3322#endif
3323 {
d0328fd7 3324 namesv = newSV_type(SVt_PV);
46fc3d4c 3325 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3326 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3327
ad64d0ec 3328 if (SvTIED_mg((const SV *)ar, PERL_MAGIC_tied))
c38a6530 3329 mg_get(dirsv);
bbed91b5
KF		 3330 if (SvROK(dirsv)) {
3331 int count;
a3b58a99 3332 SV **svp;
bbed91b5
KF		 3333 SV *loader = dirsv;
3334
e14e2dc8
NC		 3335 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3336 && !sv_isobject(loader))
3337 {
502c6561 3338 loader = *av_fetch(MUTABLE_AV(SvRV(loader)), 0, TRUE);
bbed91b5
KF		 3339 }
3340
b900a521 3341 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3342 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3343 tryname = SvPVX_const(namesv);
c445ea15 3344 tryrsfp = NULL;
bbed91b5
KF		 3345
3346 ENTER;
3347 SAVETMPS;
3348 EXTEND(SP, 2);
3349
3350 PUSHMARK(SP);
3351 PUSHs(dirsv);
3352 PUSHs(sv);
3353 PUTBACK;
e982885c
NC		 3354 if (sv_isobject(loader))
3355 count = call_method("INC", G_ARRAY);
3356 else
3357 count = call_sv(loader, G_ARRAY);
bbed91b5
KF		 3358 SPAGAIN;
3359
a3b58a99
RGS		 3360 /* Adjust file name if the hook has set an %INC entry */
3361 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3362 if (svp)
3363 tryname = SvPVX_const(*svp);
3364
bbed91b5
KF		 3365 if (count > 0) {
3366 int i = 0;
3367 SV *arg;
3368
3369 SP -= count - 1;
3370 arg = SP[i++];
3371
34113e50
NC		 3372 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3373 && !isGV_with_GP(SvRV(arg))) {
3374 filter_cache = SvRV(arg);
74c765eb 3375 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC		 3376
3377 if (i < count) {
3378 arg = SP[i++];
3379 }
3380 }
3381
6e592b3a 3382 if (SvROK(arg) && isGV_with_GP(SvRV(arg))) {
bbed91b5
KF		 3383 arg = SvRV(arg);
3384 }
3385
6e592b3a 3386 if (isGV_with_GP(arg)) {
159b6efe 3387 IO * const io = GvIO((const GV *)arg);
bbed91b5
KF		 3388
3389 ++filter_has_file;
3390
3391 if (io) {
3392 tryrsfp = IoIFP(io);
0f7de14d
NC		 3393 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3394 PerlIO_close(IoOFP(io));
bbed91b5 3395 }
0f7de14d
NC		 3396 IoIFP(io) = NULL;
3397 IoOFP(io) = NULL;
bbed91b5
KF		 3398 }
3399
3400 if (i < count) {
3401 arg = SP[i++];
3402 }