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[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW
1/* pp_ctl.c
2 *
1129b882
NC
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
4ac71550
TC
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 *
19 * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
a0d0e21e
LW
20 */
21
166f8a29
DM
22/* This file contains control-oriented pp ("push/pop") functions that
23 * execute the opcodes that make up a perl program. A typical pp function
24 * expects to find its arguments on the stack, and usually pushes its
25 * results onto the stack, hence the 'pp' terminology. Each OP structure
26 * contains a pointer to the relevant pp_foo() function.
27 *
28 * Control-oriented means things like pp_enteriter() and pp_next(), which
29 * alter the flow of control of the program.
30 */
31
32
a0d0e21e 33#include "EXTERN.h"
864dbfa3 34#define PERL_IN_PP_CTL_C
a0d0e21e
LW
35#include "perl.h"
36
37#ifndef WORD_ALIGN
dea28490 38#define WORD_ALIGN sizeof(U32)
a0d0e21e
LW
39#endif
40
54310121 41#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 42
94fcd414
NC
43#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
44
a0d0e21e
LW
45PP(pp_wantarray)
46{
97aff369 47 dVAR;
39644a26 48 dSP;
a0d0e21e
LW
49 I32 cxix;
50 EXTEND(SP, 1);
51
52 cxix = dopoptosub(cxstack_ix);
53 if (cxix < 0)
54 RETPUSHUNDEF;
55
54310121
PP
56 switch (cxstack[cxix].blk_gimme) {
57 case G_ARRAY:
a0d0e21e 58 RETPUSHYES;
54310121 59 case G_SCALAR:
a0d0e21e 60 RETPUSHNO;
54310121
PP
61 default:
62 RETPUSHUNDEF;
63 }
a0d0e21e
LW
64}
65
2cd61cdb
IZ
66PP(pp_regcreset)
67{
97aff369 68 dVAR;
2cd61cdb
IZ
69 /* XXXX Should store the old value to allow for tie/overload - and
70 restore in regcomp, where marked with XXXX. */
3280af22 71 PL_reginterp_cnt = 0;
0b4182de 72 TAINT_NOT;
2cd61cdb
IZ
73 return NORMAL;
74}
75
b3eb6a9b
GS
76PP(pp_regcomp)
77{
97aff369 78 dVAR;
39644a26 79 dSP;
a0d0e21e 80 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 81 SV *tmpstr;
84679df5 82 REGEXP *re = NULL;
bfed75c6 83
4b5a0d1c 84 /* prevent recompiling under /o and ithreads. */
3db8f154 85#if defined(USE_ITHREADS)
131b3ad0
DM
86 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
87 if (PL_op->op_flags & OPf_STACKED) {
88 dMARK;
89 SP = MARK;
90 }
91 else
92 (void)POPs;
93 RETURN;
94 }
513629ba 95#endif
131b3ad0
DM
96 if (PL_op->op_flags & OPf_STACKED) {
97 /* multiple args; concatentate them */
98 dMARK; dORIGMARK;
99 tmpstr = PAD_SV(ARGTARG);
76f68e9b 100 sv_setpvs(tmpstr, "");
131b3ad0
DM
101 while (++MARK <= SP) {
102 if (PL_amagic_generation) {
103 SV *sv;
104 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
105 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
106 {
107 sv_setsv(tmpstr, sv);
108 continue;
109 }
110 }
111 sv_catsv(tmpstr, *MARK);
112 }
113 SvSETMAGIC(tmpstr);
114 SP = ORIGMARK;
115 }
116 else
117 tmpstr = POPs;
513629ba 118
b3eb6a9b 119 if (SvROK(tmpstr)) {
d8f6592e 120 SV * const sv = SvRV(tmpstr);
5c35adbb 121 if (SvTYPE(sv) == SVt_REGEXP)
d2f13c59 122 re = (REGEXP*) sv;
c277df42 123 }
5c35adbb 124 if (re) {
f0826785 125 re = reg_temp_copy(NULL, re);
aaa362c4 126 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 127 PM_SETRE(pm, re);
c277df42
IZ
128 }
129 else {
e62f0680 130 STRLEN len;
3ab4a224 131 const char *t = SvOK(tmpstr) ? SvPV_const(tmpstr, len) : "";
c737faaf 132 re = PM_GETRE(pm);
14a49a24 133 assert (re != (REGEXP*) &PL_sv_undef);
c277df42 134
20408e3c 135 /* Check against the last compiled regexp. */
a11c8683 136 if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
220fc49f 137 memNE(RX_PRECOMP(re), t, len))
85aff577 138 {
07bc277f 139 const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
c737faaf 140 U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME;
d8f6592e
AL
141 if (re) {
142 ReREFCNT_dec(re);
14a49a24
NC
143#ifdef USE_ITHREADS
144 PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
145#else
4608196e 146 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
14a49a24 147#endif
1e2e3d02
YO
148 } else if (PL_curcop->cop_hints_hash) {
149 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
150 "regcomp", 7, 0, 0);
151 if (ptr && SvIOK(ptr) && SvIV(ptr))
152 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 153 }
664e119d 154
533c011a 155 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 156 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 157
b9ad30b4
NC
158 if (DO_UTF8(tmpstr)) {
159 assert (SvUTF8(tmpstr));
160 } else if (SvUTF8(tmpstr)) {
161 /* Not doing UTF-8, despite what the SV says. Is this only if
162 we're trapped in use 'bytes'? */
163 /* Make a copy of the octet sequence, but without the flag on,
164 as the compiler now honours the SvUTF8 flag on tmpstr. */
165 STRLEN len;
166 const char *const p = SvPV(tmpstr, len);
167 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
168 }
c737faaf 169
3ab4a224
AB
170 if (eng)
171 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
172 else
173 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 174
f86aaa29 175 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 176 inside tie/overload accessors. */
c277df42 177 }
4633a7c4 178 }
c737faaf
YO
179
180 re = PM_GETRE(pm);
a0d0e21e 181
72311751 182#ifndef INCOMPLETE_TAINTS
3280af22
NIS
183 if (PL_tainting) {
184 if (PL_tainted)
07bc277f 185 RX_EXTFLAGS(re) |= RXf_TAINTED;
72311751 186 else
07bc277f 187 RX_EXTFLAGS(re) &= ~RXf_TAINTED;
72311751
GS
188 }
189#endif
190
220fc49f 191 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 192 pm = PL_curpm;
a0d0e21e 193
c737faaf
YO
194
195#if !defined(USE_ITHREADS)
196 /* can't change the optree at runtime either */
197 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 198 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 199 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 200 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 201 }
c737faaf 202#endif
a0d0e21e
LW
203 RETURN;
204}
205
206PP(pp_substcont)
207{
97aff369 208 dVAR;
39644a26 209 dSP;
c09156bb 210 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
211 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
212 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
213 register char *s = cx->sb_s;
214 register char *m = cx->sb_m;
215 char *orig = cx->sb_orig;
901017d6 216 register REGEXP * const rx = cx->sb_rx;
c445ea15 217 SV *nsv = NULL;
988e6e7e
AE
218 REGEXP *old = PM_GETRE(pm);
219 if(old != rx) {
bfed75c6 220 if(old)
988e6e7e 221 ReREFCNT_dec(old);
d6106309 222 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
223 }
224
d9f97599 225 rxres_restore(&cx->sb_rxres, rx);
01b35787 226 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 227
a0d0e21e 228 if (cx->sb_iters++) {
a3b680e6 229 const I32 saviters = cx->sb_iters;
a0d0e21e 230 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 231 DIE(aTHX_ "Substitution loop");
a0d0e21e 232
48c036b1
GS
233 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
234 cx->sb_rxtainted |= 2;
a0d0e21e 235 sv_catsv(dstr, POPs);
2c296965
YO
236 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
237 s -= RX_GOFS(rx);
a0d0e21e
LW
238
239 /* Are we done */
2c296965
YO
240 if (CxONCE(cx) || s < orig ||
241 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
242 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
243 ((cx->sb_rflags & REXEC_COPY_STR)
244 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
245 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 246 {
823a54a3 247 SV * const targ = cx->sb_targ;
748a9306 248
078c425b
JH
249 assert(cx->sb_strend >= s);
250 if(cx->sb_strend > s) {
251 if (DO_UTF8(dstr) && !SvUTF8(targ))
252 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
253 else
254 sv_catpvn(dstr, s, cx->sb_strend - s);
255 }
48c036b1 256 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 257
f8c7b90f 258#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
259 if (SvIsCOW(targ)) {
260 sv_force_normal_flags(targ, SV_COW_DROP_PV);
261 } else
262#endif
263 {
8bd4d4c5 264 SvPV_free(targ);
ed252734 265 }
f880fe2f 266 SvPV_set(targ, SvPVX(dstr));
748a9306
LW
267 SvCUR_set(targ, SvCUR(dstr));
268 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH
269 if (DO_UTF8(dstr))
270 SvUTF8_on(targ);
6136c704 271 SvPV_set(dstr, NULL);
48c036b1
GS
272
273 TAINT_IF(cx->sb_rxtainted & 1);
6e449a3a 274 mPUSHi(saviters - 1);
48c036b1 275
ffc61ed2 276 (void)SvPOK_only_UTF8(targ);
48c036b1 277 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 278 SvSETMAGIC(targ);
9212bbba 279 SvTAINT(targ);
5cd24f17 280
4633a7c4 281 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
282 POPSUBST(cx);
283 RETURNOP(pm->op_next);
284 }
8e5e9ebe 285 cx->sb_iters = saviters;
a0d0e21e 286 }
07bc277f 287 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
288 m = s;
289 s = orig;
07bc277f 290 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
291 s = orig + (m - s);
292 cx->sb_strend = s + (cx->sb_strend - m);
293 }
07bc277f 294 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 295 if (m > s) {
bfed75c6 296 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
297 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
298 else
299 sv_catpvn(dstr, s, m-s);
300 }
07bc277f 301 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 302 { /* Update the pos() information. */
44f8325f 303 SV * const sv = cx->sb_targ;
084916e3 304 MAGIC *mg;
7a7f3e45 305 SvUPGRADE(sv, SVt_PVMG);
14befaf4 306 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 307#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 308 if (SvIsCOW(sv))
d83f0a82
NC
309 sv_force_normal_flags(sv, 0);
310#endif
311 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
312 NULL, 0);
084916e3 313 }
ce474962 314 mg->mg_len = m - orig;
084916e3 315 }
988e6e7e 316 if (old != rx)
d6106309 317 (void)ReREFCNT_inc(rx);
d9f97599
GS
318 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
319 rxres_save(&cx->sb_rxres, rx);
29f2e912 320 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
321}
322
c90c0ff4 323void
864dbfa3 324Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
325{
326 UV *p = (UV*)*rsp;
327 U32 i;
7918f24d
NC
328
329 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 330 PERL_UNUSED_CONTEXT;
c90c0ff4 331
07bc277f 332 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 333#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 334 i = 7 + RX_NPARENS(rx) * 2;
ed252734 335#else
07bc277f 336 i = 6 + RX_NPARENS(rx) * 2;
ed252734 337#endif
c90c0ff4 338 if (!p)
a02a5408 339 Newx(p, i, UV);
c90c0ff4
PP
340 else
341 Renew(p, i, UV);
342 *rsp = (void*)p;
343 }
344
07bc277f 345 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 346 RX_MATCH_COPIED_off(rx);
c90c0ff4 347
f8c7b90f 348#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
349 *p++ = PTR2UV(RX_SAVED_COPY(rx));
350 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
351#endif
352
07bc277f 353 *p++ = RX_NPARENS(rx);
c90c0ff4 354
07bc277f
NC
355 *p++ = PTR2UV(RX_SUBBEG(rx));
356 *p++ = (UV)RX_SUBLEN(rx);
357 for (i = 0; i <= RX_NPARENS(rx); ++i) {
358 *p++ = (UV)RX_OFFS(rx)[i].start;
359 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
360 }
361}
362
9c105995
NC
363static void
364S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
365{
366 UV *p = (UV*)*rsp;
367 U32 i;
7918f24d
NC
368
369 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 370 PERL_UNUSED_CONTEXT;
c90c0ff4 371
ed252734 372 RX_MATCH_COPY_FREE(rx);
cf93c79d 373 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
374 *p++ = 0;
375
f8c7b90f 376#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
377 if (RX_SAVED_COPY(rx))
378 SvREFCNT_dec (RX_SAVED_COPY(rx));
379 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
380 *p++ = 0;
381#endif
382
07bc277f 383 RX_NPARENS(rx) = *p++;
c90c0ff4 384
07bc277f
NC
385 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
386 RX_SUBLEN(rx) = (I32)(*p++);
387 for (i = 0; i <= RX_NPARENS(rx); ++i) {
388 RX_OFFS(rx)[i].start = (I32)(*p++);
389 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
390 }
391}
392
9c105995
NC
393static void
394S_rxres_free(pTHX_ void **rsp)
c90c0ff4 395{
44f8325f 396 UV * const p = (UV*)*rsp;
7918f24d
NC
397
398 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 399 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
400
401 if (p) {
94010e71
NC
402#ifdef PERL_POISON
403 void *tmp = INT2PTR(char*,*p);
404 Safefree(tmp);
405 if (*p)
7e337ee0 406 PoisonFree(*p, 1, sizeof(*p));
94010e71 407#else
56431972 408 Safefree(INT2PTR(char*,*p));
94010e71 409#endif
f8c7b90f 410#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
411 if (p[1]) {
412 SvREFCNT_dec (INT2PTR(SV*,p[1]));
413 }
414#endif
c90c0ff4 415 Safefree(p);
4608196e 416 *rsp = NULL;
c90c0ff4
PP
417 }
418}
419
a0d0e21e
LW
420PP(pp_formline)
421{
97aff369 422 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 423 register SV * const tmpForm = *++MARK;
dea28490 424 register U32 *fpc;
a0d0e21e 425 register char *t;
245d4a47 426 const char *f;
a0d0e21e 427 register I32 arg;
c445ea15
AL
428 register SV *sv = NULL;
429 const char *item = NULL;
9c5ffd7c
JH
430 I32 itemsize = 0;
431 I32 fieldsize = 0;
a0d0e21e 432 I32 lines = 0;
c445ea15
AL
433 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
434 const char *chophere = NULL;
435 char *linemark = NULL;
65202027 436 NV value;
9c5ffd7c 437 bool gotsome = FALSE;
a0d0e21e 438 STRLEN len;
823a54a3 439 const STRLEN fudge = SvPOK(tmpForm)
24c89738 440 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
441 bool item_is_utf8 = FALSE;
442 bool targ_is_utf8 = FALSE;
c445ea15 443 SV * nsv = NULL;
cbbf8932 444 OP * parseres = NULL;
bfed75c6 445 const char *fmt;
a0d0e21e 446
76e3520e 447 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
448 if (SvREADONLY(tmpForm)) {
449 SvREADONLY_off(tmpForm);
a1b95068 450 parseres = doparseform(tmpForm);
445b3f51
GS
451 SvREADONLY_on(tmpForm);
452 }
453 else
a1b95068
LW
454 parseres = doparseform(tmpForm);
455 if (parseres)
456 return parseres;
a0d0e21e 457 }
3280af22 458 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
459 if (DO_UTF8(PL_formtarget))
460 targ_is_utf8 = TRUE;
a0ed51b3 461 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 462 t += len;
245d4a47 463 f = SvPV_const(tmpForm, len);
a0d0e21e 464 /* need to jump to the next word */
245d4a47 465 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
466
467 for (;;) {
468 DEBUG_f( {
bfed75c6 469 const char *name = "???";
a0d0e21e
LW
470 arg = -1;
471 switch (*fpc) {
472 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
473 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
474 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
475 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
476 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
477
478 case FF_CHECKNL: name = "CHECKNL"; break;
479 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
480 case FF_SPACE: name = "SPACE"; break;
481 case FF_HALFSPACE: name = "HALFSPACE"; break;
482 case FF_ITEM: name = "ITEM"; break;
483 case FF_CHOP: name = "CHOP"; break;
484 case FF_LINEGLOB: name = "LINEGLOB"; break;
485 case FF_NEWLINE: name = "NEWLINE"; break;
486 case FF_MORE: name = "MORE"; break;
487 case FF_LINEMARK: name = "LINEMARK"; break;
488 case FF_END: name = "END"; break;
bfed75c6 489 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 490 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
491 }
492 if (arg >= 0)
bf49b057 493 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 494 else
bf49b057 495 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 496 } );
a0d0e21e
LW
497 switch (*fpc++) {
498 case FF_LINEMARK:
499 linemark = t;
a0d0e21e
LW
500 lines++;
501 gotsome = FALSE;
502 break;
503
504 case FF_LITERAL:
505 arg = *fpc++;
1bd51a4c 506 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 507 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
508 *t = '\0';
509 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
510 t = SvEND(PL_formtarget);
f3f2f1a3 511 f += arg;
1bd51a4c
IH
512 break;
513 }
514 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 515 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c 516 *t = '\0';
7bf79863 517 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC, fudge + 1);
1bd51a4c
IH
518 t = SvEND(PL_formtarget);
519 targ_is_utf8 = TRUE;
520 }
a0d0e21e
LW
521 while (arg--)
522 *t++ = *f++;
523 break;
524
525 case FF_SKIP:
526 f += *fpc++;
527 break;
528
529 case FF_FETCH:
530 arg = *fpc++;
531 f += arg;
532 fieldsize = arg;
533
534 if (MARK < SP)
535 sv = *++MARK;
536 else {
3280af22 537 sv = &PL_sv_no;
a2a5de95 538 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
539 }
540 break;
541
542 case FF_CHECKNL:
5a34cab7
NC
543 {
544 const char *send;
545 const char *s = item = SvPV_const(sv, len);
546 itemsize = len;
547 if (DO_UTF8(sv)) {
548 itemsize = sv_len_utf8(sv);
549 if (itemsize != (I32)len) {
550 I32 itembytes;
551 if (itemsize > fieldsize) {
552 itemsize = fieldsize;
553 itembytes = itemsize;
554 sv_pos_u2b(sv, &itembytes, 0);
555 }
556 else
557 itembytes = len;
558 send = chophere = s + itembytes;
559 while (s < send) {
560 if (*s & ~31)
561 gotsome = TRUE;
562 else if (*s == '\n')
563 break;
564 s++;
565 }
566 item_is_utf8 = TRUE;
567 itemsize = s - item;
568 sv_pos_b2u(sv, &itemsize);
569 break;
a0ed51b3 570 }
a0ed51b3 571 }
5a34cab7
NC
572 item_is_utf8 = FALSE;
573 if (itemsize > fieldsize)
574 itemsize = fieldsize;
575 send = chophere = s + itemsize;
576 while (s < send) {
577 if (*s & ~31)
578 gotsome = TRUE;
579 else if (*s == '\n')
580 break;
581 s++;
582 }
583 itemsize = s - item;
584 break;
a0ed51b3 585 }
a0d0e21e
LW
586
587 case FF_CHECKCHOP:
5a34cab7
NC
588 {
589 const char *s = item = SvPV_const(sv, len);
590 itemsize = len;
591 if (DO_UTF8(sv)) {
592 itemsize = sv_len_utf8(sv);
593 if (itemsize != (I32)len) {
594 I32 itembytes;
595 if (itemsize <= fieldsize) {
596 const char *send = chophere = s + itemsize;
597 while (s < send) {
598 if (*s == '\r') {
599 itemsize = s - item;
a0ed51b3 600 chophere = s;
a0ed51b3 601 break;
5a34cab7
NC
602 }
603 if (*s++ & ~31)
a0ed51b3 604 gotsome = TRUE;
a0ed51b3 605 }
a0ed51b3 606 }
5a34cab7
NC
607 else {
608 const char *send;
609 itemsize = fieldsize;
610 itembytes = itemsize;
611 sv_pos_u2b(sv, &itembytes, 0);
612 send = chophere = s + itembytes;
613 while (s < send || (s == send && isSPACE(*s))) {
614 if (isSPACE(*s)) {
615 if (chopspace)
616 chophere = s;
617 if (*s == '\r')
618 break;
619 }
620 else {
621 if (*s & ~31)
622 gotsome = TRUE;
623 if (strchr(PL_chopset, *s))
624 chophere = s + 1;
625 }
626 s++;
627 }
628 itemsize = chophere - item;
629 sv_pos_b2u(sv, &itemsize);
630 }
631 item_is_utf8 = TRUE;
a0d0e21e
LW
632 break;
633 }
a0d0e21e 634 }
5a34cab7
NC
635 item_is_utf8 = FALSE;
636 if (itemsize <= fieldsize) {
637 const char *const send = chophere = s + itemsize;
638 while (s < send) {
639 if (*s == '\r') {
640 itemsize = s - item;
a0d0e21e 641 chophere = s;
a0d0e21e 642 break;
5a34cab7
NC
643 }
644 if (*s++ & ~31)
a0d0e21e 645 gotsome = TRUE;
a0d0e21e 646 }
a0d0e21e 647 }
5a34cab7
NC
648 else {
649 const char *send;
650 itemsize = fieldsize;
651 send = chophere = s + itemsize;
652 while (s < send || (s == send && isSPACE(*s))) {
653 if (isSPACE(*s)) {
654 if (chopspace)
655 chophere = s;
656 if (*s == '\r')
657 break;
658 }
659 else {
660 if (*s & ~31)
661 gotsome = TRUE;
662 if (strchr(PL_chopset, *s))
663 chophere = s + 1;
664 }
665 s++;
666 }
667 itemsize = chophere - item;
668 }
669 break;
a0d0e21e 670 }
a0d0e21e
LW
671
672 case FF_SPACE:
673 arg = fieldsize - itemsize;
674 if (arg) {
675 fieldsize -= arg;
676 while (arg-- > 0)
677 *t++ = ' ';
678 }
679 break;
680
681 case FF_HALFSPACE:
682 arg = fieldsize - itemsize;
683 if (arg) {
684 arg /= 2;
685 fieldsize -= arg;
686 while (arg-- > 0)
687 *t++ = ' ';
688 }
689 break;
690
691 case FF_ITEM:
5a34cab7
NC
692 {
693 const char *s = item;
694 arg = itemsize;
695 if (item_is_utf8) {
696 if (!targ_is_utf8) {
697 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
698 *t = '\0';
7bf79863
KW
699 sv_utf8_upgrade_flags_grow(PL_formtarget, SV_GMAGIC,
700 fudge + 1);
5a34cab7
NC
701 t = SvEND(PL_formtarget);
702 targ_is_utf8 = TRUE;
a0ed51b3 703 }
5a34cab7
NC
704 while (arg--) {
705 if (UTF8_IS_CONTINUED(*s)) {
706 STRLEN skip = UTF8SKIP(s);
707 switch (skip) {
708 default:
709 Move(s,t,skip,char);
710 s += skip;
711 t += skip;
712 break;
713 case 7: *t++ = *s++;
714 case 6: *t++ = *s++;
715 case 5: *t++ = *s++;
716 case 4: *t++ = *s++;
717 case 3: *t++ = *s++;
718 case 2: *t++ = *s++;
719 case 1: *t++ = *s++;
720 }
721 }
722 else {
723 if ( !((*t++ = *s++) & ~31) )
724 t[-1] = ' ';
725 }
a0ed51b3 726 }
5a34cab7 727 break;
a0ed51b3 728 }
5a34cab7
NC
729 if (targ_is_utf8 && !item_is_utf8) {
730 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
731 *t = '\0';
732 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
733 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 734#ifdef EBCDIC
901017d6 735 const int ch = *t;
5a34cab7 736 if (iscntrl(ch))
78da4d13 737#else
5a34cab7 738 if (!(*t & ~31))
78da4d13 739#endif
5a34cab7
NC
740 *t = ' ';
741 }
742 break;
78da4d13 743 }
5a34cab7 744 while (arg--) {
9d116dd7 745#ifdef EBCDIC
901017d6 746 const int ch = *t++ = *s++;
5a34cab7 747 if (iscntrl(ch))
a0d0e21e 748#else
5a34cab7 749 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 750#endif
5a34cab7
NC
751 t[-1] = ' ';
752 }
753 break;
a0d0e21e 754 }
a0d0e21e
LW
755
756 case FF_CHOP:
5a34cab7
NC
757 {
758 const char *s = chophere;
759 if (chopspace) {
af68e756 760 while (isSPACE(*s))
5a34cab7
NC
761 s++;
762 }
763 sv_chop(sv,s);
764 SvSETMAGIC(sv);
765 break;
a0d0e21e 766 }
a0d0e21e 767
a1b95068
LW
768 case FF_LINESNGL:
769 chopspace = 0;
a0d0e21e 770 case FF_LINEGLOB:
5a34cab7 771 {
e32383e2 772 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 773 const char *s = item = SvPV_const(sv, len);
f3f2f1a3 774 item_is_utf8 = DO_UTF8(sv);
5a34cab7 775 itemsize = len;
5a34cab7 776 if (itemsize) {
e8e72d41 777 STRLEN to_copy = itemsize;
5a34cab7 778 const char *const send = s + len;
35c6393c 779 const U8 *source = (const U8 *) s;
e8e72d41
NC
780 U8 *tmp = NULL;
781
5a34cab7
NC
782 gotsome = TRUE;
783 chophere = s + itemsize;
784 while (s < send) {
785 if (*s++ == '\n') {
786 if (oneline) {
e8e72d41 787 to_copy = s - SvPVX_const(sv) - 1;
5a34cab7
NC
788 chophere = s;
789 break;
790 } else {
791 if (s == send) {
792 itemsize--;
e8e72d41 793 to_copy--;
5a34cab7
NC
794 } else
795 lines++;
796 }
1bd51a4c 797 }
a0d0e21e 798 }
e8e72d41 799 if (targ_is_utf8 && !item_is_utf8) {
35c6393c 800 source = tmp = bytes_to_utf8(source, &to_copy);
e8e72d41
NC
801 SvCUR_set(PL_formtarget,
802 t - SvPVX_const(PL_formtarget));
803 } else {
804 if (item_is_utf8 && !targ_is_utf8) {
805 /* Upgrade targ to UTF8, and then we reduce it to
806 a problem we have a simple solution for. */
807 SvCUR_set(PL_formtarget,
808 t - SvPVX_const(PL_formtarget));
809 targ_is_utf8 = TRUE;
810 /* Don't need get magic. */
7bf79863 811 sv_utf8_upgrade_nomg(PL_formtarget);
e8e72d41
NC
812 } else {
813 SvCUR_set(PL_formtarget,
814 t - SvPVX_const(PL_formtarget));
815 }
e8e72d41
NC
816
817 /* Easy. They agree. */
818 assert (item_is_utf8 == targ_is_utf8);
819 }
820 SvGROW(PL_formtarget,
821 SvCUR(PL_formtarget) + to_copy + fudge + 1);
5a34cab7 822 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
e8e72d41
NC
823
824 Copy(source, t, to_copy, char);
825 t += to_copy;
826 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
f3f2f1a3 827 if (item_is_utf8) {
e8e72d41
NC
828 if (SvGMAGICAL(sv)) {
829 /* Mustn't call sv_pos_b2u() as it does a second
830 mg_get(). Is this a bug? Do we need a _flags()
831 variant? */
832 itemsize = utf8_length(source, source + itemsize);
833 } else {
834 sv_pos_b2u(sv, &itemsize);
835 }
836 assert(!tmp);
837 } else if (tmp) {
838 Safefree(tmp);
f3f2f1a3 839 }
a0d0e21e 840 }
5a34cab7 841 break;
a0d0e21e 842 }
a0d0e21e 843
a1b95068
LW
844 case FF_0DECIMAL:
845 arg = *fpc++;
846#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
847 fmt = (const char *)
848 ((arg & 256) ?
849 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 850#else
10edeb5d
JH
851 fmt = (const char *)
852 ((arg & 256) ?
853 "%#0*.*f" : "%0*.*f");
a1b95068
LW
854#endif
855 goto ff_dec;
a0d0e21e 856 case FF_DECIMAL:
a0d0e21e 857 arg = *fpc++;
65202027 858#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
859 fmt = (const char *)
860 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 861#else
10edeb5d
JH
862 fmt = (const char *)
863 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 864#endif
a1b95068 865 ff_dec:
784707d5
JP
866 /* If the field is marked with ^ and the value is undefined,
867 blank it out. */
784707d5
JP
868 if ((arg & 512) && !SvOK(sv)) {
869 arg = fieldsize;
870 while (arg--)
871 *t++ = ' ';
872 break;
873 }
874 gotsome = TRUE;
875 value = SvNV(sv);
a1b95068 876 /* overflow evidence */
bfed75c6 877 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
878 arg = fieldsize;
879 while (arg--)
880 *t++ = '#';
881 break;
882 }
784707d5
JP
883 /* Formats aren't yet marked for locales, so assume "yes". */
884 {
885 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 886 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
887 RESTORE_NUMERIC_STANDARD();
888 }
889 t += fieldsize;
890 break;
a1b95068 891
a0d0e21e
LW
892 case FF_NEWLINE:
893 f++;
894 while (t-- > linemark && *t == ' ') ;
895 t++;
896 *t++ = '\n';
897 break;
898
899 case FF_BLANK:
900 arg = *fpc++;
901 if (gotsome) {
902 if (arg) { /* repeat until fields exhausted? */
903 *t = '\0';
b15aece3 904 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 905 lines += FmLINES(PL_formtarget);
1bd51a4c
IH
906 if (targ_is_utf8)
907 SvUTF8_on(PL_formtarget);
3280af22 908 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
909 SP = ORIGMARK;
910 RETURNOP(cLISTOP->op_first);
911 }
912 }
913 else {
914 t = linemark;
915 lines--;
916 }
917 break;
918
919 case FF_MORE:
5a34cab7
NC
920 {
921 const char *s = chophere;
922 const char *send = item + len;
923 if (chopspace) {
af68e756 924 while (isSPACE(*s) && (s < send))
5a34cab7 925 s++;
a0d0e21e 926 }
5a34cab7
NC
927 if (s < send) {
928 char *s1;
929 arg = fieldsize - itemsize;
930 if (arg) {
931 fieldsize -= arg;
932 while (arg-- > 0)
933 *t++ = ' ';
934 }
935 s1 = t - 3;
936 if (strnEQ(s1," ",3)) {
937 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
938 s1--;
939 }
940 *s1++ = '.';
941 *s1++ = '.';
942 *s1++ = '.';
a0d0e21e 943 }
5a34cab7 944 break;
a0d0e21e 945 }
a0d0e21e
LW
946 case FF_END:
947 *t = '\0';
b15aece3 948 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
949 if (targ_is_utf8)
950 SvUTF8_on(PL_formtarget);
3280af22 951 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
952 SP = ORIGMARK;
953 RETPUSHYES;
954 }
955 }
956}
957
958PP(pp_grepstart)
959{
27da23d5 960 dVAR; dSP;
a0d0e21e
LW
961 SV *src;
962
3280af22 963 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 964 (void)POPMARK;
54310121 965 if (GIMME_V == G_SCALAR)
6e449a3a 966 mXPUSHi(0);
533c011a 967 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 968 }
3280af22 969 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
970 pp_pushmark(); /* push dst */
971 pp_pushmark(); /* push src */
a0d0e21e
LW
972 ENTER; /* enter outer scope */
973
974 SAVETMPS;
59f00321
RGS
975 if (PL_op->op_private & OPpGREP_LEX)
976 SAVESPTR(PAD_SVl(PL_op->op_targ));
977 else
978 SAVE_DEFSV;
a0d0e21e 979 ENTER; /* enter inner scope */
7766f137 980 SAVEVPTR(PL_curpm);
a0d0e21e 981
3280af22 982 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 983 SvTEMP_off(src);
59f00321
RGS
984 if (PL_op->op_private & OPpGREP_LEX)
985 PAD_SVl(PL_op->op_targ) = src;
986 else
414bf5ae 987 DEFSV_set(src);
a0d0e21e
LW
988
989 PUTBACK;
533c011a 990 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 991 pp_pushmark(); /* push top */
533c011a 992 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
993}
994
a0d0e21e
LW
995PP(pp_mapwhile)
996{
27da23d5 997 dVAR; dSP;
f54cb97a 998 const I32 gimme = GIMME_V;
544f3153 999 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
1000 I32 count;
1001 I32 shift;
1002 SV** src;
ac27b0f5 1003 SV** dst;
a0d0e21e 1004
544f3153 1005 /* first, move source pointer to the next item in the source list */
3280af22 1006 ++PL_markstack_ptr[-1];
544f3153
GS
1007
1008 /* if there are new items, push them into the destination list */
4c90a460 1009 if (items && gimme != G_VOID) {
544f3153
GS
1010 /* might need to make room back there first */
1011 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1012 /* XXX this implementation is very pessimal because the stack
1013 * is repeatedly extended for every set of items. Is possible
1014 * to do this without any stack extension or copying at all
1015 * by maintaining a separate list over which the map iterates
18ef8bea 1016 * (like foreach does). --gsar */
544f3153
GS
1017
1018 /* everything in the stack after the destination list moves
1019 * towards the end the stack by the amount of room needed */
1020 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1021
1022 /* items to shift up (accounting for the moved source pointer) */
1023 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
1024
1025 /* This optimization is by Ben Tilly and it does
1026 * things differently from what Sarathy (gsar)
1027 * is describing. The downside of this optimization is
1028 * that leaves "holes" (uninitialized and hopefully unused areas)
1029 * to the Perl stack, but on the other hand this
1030 * shouldn't be a problem. If Sarathy's idea gets
1031 * implemented, this optimization should become
1032 * irrelevant. --jhi */
1033 if (shift < count)
1034 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1035
924508f0
GS
1036 EXTEND(SP,shift);
1037 src = SP;
1038 dst = (SP += shift);
3280af22
NIS
1039 PL_markstack_ptr[-1] += shift;
1040 *PL_markstack_ptr += shift;
544f3153 1041 while (count--)
a0d0e21e
LW
1042 *dst-- = *src--;
1043 }
544f3153 1044 /* copy the new items down to the destination list */
ac27b0f5 1045 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
1046 if (gimme == G_ARRAY) {
1047 while (items-- > 0)
1048 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1049 }
bfed75c6 1050 else {
22023b26
TP
1051 /* scalar context: we don't care about which values map returns
1052 * (we use undef here). And so we certainly don't want to do mortal
1053 * copies of meaningless values. */
1054 while (items-- > 0) {
b988aa42 1055 (void)POPs;
22023b26
TP
1056 *dst-- = &PL_sv_undef;
1057 }
1058 }
a0d0e21e
LW
1059 }
1060 LEAVE; /* exit inner scope */
1061
1062 /* All done yet? */
3280af22 1063 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1064
1065 (void)POPMARK; /* pop top */
1066 LEAVE; /* exit outer scope */
1067 (void)POPMARK; /* pop src */
3280af22 1068 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1069 (void)POPMARK; /* pop dst */
3280af22 1070 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1071 if (gimme == G_SCALAR) {
7cc47870
RGS
1072 if (PL_op->op_private & OPpGREP_LEX) {
1073 SV* sv = sv_newmortal();
1074 sv_setiv(sv, items);
1075 PUSHs(sv);
1076 }
1077 else {
1078 dTARGET;
1079 XPUSHi(items);
1080 }
a0d0e21e 1081 }
54310121
PP
1082 else if (gimme == G_ARRAY)
1083 SP += items;
a0d0e21e
LW
1084 RETURN;
1085 }
1086 else {
1087 SV *src;
1088
1089 ENTER; /* enter inner scope */
7766f137 1090 SAVEVPTR(PL_curpm);
a0d0e21e 1091
544f3153 1092 /* set $_ to the new source item */
3280af22 1093 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1094 SvTEMP_off(src);
59f00321
RGS
1095 if (PL_op->op_private & OPpGREP_LEX)
1096 PAD_SVl(PL_op->op_targ) = src;
1097 else
414bf5ae 1098 DEFSV_set(src);
a0d0e21e
LW
1099
1100 RETURNOP(cLOGOP->op_other);
1101 }
1102}
1103
a0d0e21e
LW
1104/* Range stuff. */
1105
1106PP(pp_range)
1107{
97aff369 1108 dVAR;
a0d0e21e 1109 if (GIMME == G_ARRAY)
1a67a97c 1110 return NORMAL;
538573f7 1111 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1112 return cLOGOP->op_other;
538573f7 1113 else
1a67a97c 1114 return NORMAL;
a0d0e21e
LW
1115}
1116
1117PP(pp_flip)
1118{
97aff369 1119 dVAR;
39644a26 1120 dSP;
a0d0e21e
LW
1121
1122 if (GIMME == G_ARRAY) {
1a67a97c 1123 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1124 }
1125 else {
1126 dTOPss;
44f8325f 1127 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1128 int flip = 0;
790090df 1129
bfed75c6 1130 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1131 if (GvIO(PL_last_in_gv)) {
1132 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1133 }
1134 else {
fafc274c 1135 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1136 if (gv && GvSV(gv))
1137 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1138 }
bfed75c6
AL
1139 } else {
1140 flip = SvTRUE(sv);
1141 }
1142 if (flip) {
a0d0e21e 1143 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1144 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1145 sv_setiv(targ, 1);
3e3baf6d 1146 SETs(targ);
a0d0e21e
LW
1147 RETURN;
1148 }
1149 else {
1150 sv_setiv(targ, 0);
924508f0 1151 SP--;
1a67a97c 1152 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1153 }
1154 }
76f68e9b 1155 sv_setpvs(TARG, "");
a0d0e21e
LW
1156 SETs(targ);
1157 RETURN;
1158 }
1159}
1160
8e9bbdb9
RGS
1161/* This code tries to decide if "$left .. $right" should use the
1162 magical string increment, or if the range is numeric (we make
1163 an exception for .."0" [#18165]). AMS 20021031. */
1164
1165#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1166 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1167 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1168 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1169 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1170 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1171
a0d0e21e
LW
1172PP(pp_flop)
1173{
97aff369 1174 dVAR; dSP;
a0d0e21e
LW
1175
1176 if (GIMME == G_ARRAY) {
1177 dPOPPOPssrl;
86cb7173 1178
5b295bef
RD
1179 SvGETMAGIC(left);
1180 SvGETMAGIC(right);
a0d0e21e 1181
8e9bbdb9 1182 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1183 register IV i, j;
1184 IV max;
4fe3f0fa
MHM
1185 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1186 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1187 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1188 i = SvIV(left);
1189 max = SvIV(right);
bbce6d69 1190 if (max >= i) {
c1ab3db2
AK
1191 j = max - i + 1;
1192 EXTEND_MORTAL(j);
1193 EXTEND(SP, j);
bbce6d69 1194 }
c1ab3db2
AK
1195 else
1196 j = 0;
1197 while (j--) {
901017d6 1198 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1199 PUSHs(sv);
1200 }
1201 }
1202 else {
44f8325f 1203 SV * const final = sv_mortalcopy(right);
13c5b33c 1204 STRLEN len;
823a54a3 1205 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1206
901017d6 1207 SV *sv = sv_mortalcopy(left);
13c5b33c 1208 SvPV_force_nolen(sv);
89ea2908 1209 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1210 XPUSHs(sv);
b15aece3 1211 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1212 break;
a0d0e21e
LW
1213 sv = sv_2mortal(newSVsv(sv));
1214 sv_inc(sv);
1215 }
a0d0e21e
LW
1216 }
1217 }
1218 else {
1219 dTOPss;
901017d6 1220 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1221 int flop = 0;
a0d0e21e 1222 sv_inc(targ);
4e3399f9
YST
1223
1224 if (PL_op->op_private & OPpFLIP_LINENUM) {
1225 if (GvIO(PL_last_in_gv)) {
1226 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1227 }
1228 else {
fafc274c 1229 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1230 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1231 }
1232 }
1233 else {
1234 flop = SvTRUE(sv);
1235 }
1236
1237 if (flop) {
a0d0e21e 1238 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1239 sv_catpvs(targ, "E0");
a0d0e21e
LW
1240 }
1241 SETs(targ);
1242 }
1243
1244 RETURN;
1245}
1246
1247/* Control. */
1248
27da23d5 1249static const char * const context_name[] = {
515afda2 1250 "pseudo-block",
f31522f3 1251 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1252 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1253 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC
1254 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1255 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1256 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1257 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1258 "subroutine",
76753e7f 1259 "format",
515afda2 1260 "eval",
515afda2 1261 "substitution",
515afda2
NC
1262};
1263
76e3520e 1264STATIC I32
06b5626a 1265S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1266{
97aff369 1267 dVAR;
a0d0e21e 1268 register I32 i;
a0d0e21e 1269
7918f24d
NC
1270 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1271
a0d0e21e 1272 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1273 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1274 switch (CxTYPE(cx)) {
a0d0e21e 1275 case CXt_SUBST:
a0d0e21e 1276 case CXt_SUB:
7766f137 1277 case CXt_FORMAT:
a0d0e21e 1278 case CXt_EVAL:
0a753a76 1279 case CXt_NULL:
a2a5de95
NC
1280 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1281 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1282 if (CxTYPE(cx) == CXt_NULL)
1283 return -1;
1284 break;
c6fdafd0 1285 case CXt_LOOP_LAZYIV:
d01136d6 1286 case CXt_LOOP_LAZYSV:
3b719c58
NC
1287 case CXt_LOOP_FOR:
1288 case CXt_LOOP_PLAIN:
a61a7064 1289 if ( !CxLABEL(cx) || strNE(label, CxLABEL(cx)) ) {
cea2e8a9 1290 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
a61a7064 1291 (long)i, CxLABEL(cx)));
a0d0e21e
LW
1292 continue;
1293 }
cea2e8a9 1294 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1295 return i;
1296 }
1297 }
1298 return i;
1299}
1300
0d863452
RH
1301
1302
e50aee73 1303I32
864dbfa3 1304Perl_dowantarray(pTHX)
e50aee73 1305{
97aff369 1306 dVAR;
f54cb97a 1307 const I32 gimme = block_gimme();
54310121
PP
1308 return (gimme == G_VOID) ? G_SCALAR : gimme;
1309}
1310
1311I32
864dbfa3 1312Perl_block_gimme(pTHX)
54310121 1313{
97aff369 1314 dVAR;
06b5626a 1315 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1316 if (cxix < 0)
46fc3d4c 1317 return G_VOID;
e50aee73 1318
54310121 1319 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1320 case G_VOID:
1321 return G_VOID;
54310121 1322 case G_SCALAR:
e50aee73 1323 return G_SCALAR;
54310121
PP
1324 case G_ARRAY:
1325 return G_ARRAY;
1326 default:
cea2e8a9 1327 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1328 /* NOTREACHED */
1329 return 0;
54310121 1330 }
e50aee73
AD
1331}
1332
78f9721b
SM
1333I32
1334Perl_is_lvalue_sub(pTHX)
1335{
97aff369 1336 dVAR;
06b5626a 1337 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1338 assert(cxix >= 0); /* We should only be called from inside subs */
1339
bafb2adc
NC
1340 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1341 return CxLVAL(cxstack + cxix);
78f9721b
SM
1342 else
1343 return 0;
1344}
1345
76e3520e 1346STATIC I32
901017d6 1347S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1348{
97aff369 1349 dVAR;
a0d0e21e 1350 I32 i;
7918f24d
NC
1351
1352 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1353
a0d0e21e 1354 for (i = startingblock; i >= 0; i--) {
901017d6 1355 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1356 switch (CxTYPE(cx)) {
a0d0e21e
LW
1357 default:
1358 continue;
1359 case CXt_EVAL:
1360 case CXt_SUB:
7766f137 1361 case CXt_FORMAT:
cea2e8a9 1362 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1363 return i;
1364 }
1365 }
1366 return i;
1367}
1368
76e3520e 1369STATIC I32
cea2e8a9 1370S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1371{
97aff369 1372 dVAR;
a0d0e21e 1373 I32 i;
a0d0e21e 1374 for (i = startingblock; i >= 0; i--) {
06b5626a 1375 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1376 switch (CxTYPE(cx)) {
a0d0e21e
LW
1377 default:
1378 continue;
1379 case CXt_EVAL:
cea2e8a9 1380 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1381 return i;
1382 }
1383 }
1384 return i;
1385}
1386
76e3520e 1387STATIC I32
cea2e8a9 1388S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1389{
97aff369 1390 dVAR;
a0d0e21e 1391 I32 i;
a0d0e21e 1392 for (i = startingblock; i >= 0; i--) {
901017d6 1393 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1394 switch (CxTYPE(cx)) {
a0d0e21e 1395 case CXt_SUBST:
a0d0e21e 1396 case CXt_SUB:
7766f137 1397 case CXt_FORMAT:
a0d0e21e 1398 case CXt_EVAL:
0a753a76 1399 case CXt_NULL:
a2a5de95
NC
1400 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1401 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC
1402 if ((CxTYPE(cx)) == CXt_NULL)
1403 return -1;
1404 break;
c6fdafd0 1405 case CXt_LOOP_LAZYIV:
d01136d6 1406 case CXt_LOOP_LAZYSV:
3b719c58
NC
1407 case CXt_LOOP_FOR:
1408 case CXt_LOOP_PLAIN:
cea2e8a9 1409 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1410 return i;
1411 }
1412 }
1413 return i;
1414}
1415
0d863452
RH
1416STATIC I32
1417S_dopoptogiven(pTHX_ I32 startingblock)
1418{
97aff369 1419 dVAR;
0d863452
RH
1420 I32 i;
1421 for (i = startingblock; i >= 0; i--) {
1422 register const PERL_CONTEXT *cx = &cxstack[i];
1423 switch (CxTYPE(cx)) {
1424 default:
1425 continue;
1426 case CXt_GIVEN:
1427 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1428 return i;
3b719c58
NC
1429 case CXt_LOOP_PLAIN:
1430 assert(!CxFOREACHDEF(cx));
1431 break;
c6fdafd0 1432 case CXt_LOOP_LAZYIV:
d01136d6 1433 case CXt_LOOP_LAZYSV:
3b719c58 1434 case CXt_LOOP_FOR:
0d863452
RH
1435 if (CxFOREACHDEF(cx)) {
1436 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1437 return i;
1438 }
1439 }
1440 }
1441 return i;
1442}
1443
1444STATIC I32
1445S_dopoptowhen(pTHX_ I32 startingblock)
1446{
97aff369 1447 dVAR;
0d863452
RH
1448 I32 i;
1449 for (i = startingblock; i >= 0; i--) {
1450 register const PERL_CONTEXT *cx = &cxstack[i];
1451 switch (CxTYPE(cx)) {
1452 default:
1453 continue;
1454 case CXt_WHEN:
1455 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1456 return i;
1457 }
1458 }
1459 return i;
1460}
1461
a0d0e21e 1462void
864dbfa3 1463Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1464{
97aff369 1465 dVAR;
a0d0e21e
LW
1466 I32 optype;
1467
1468 while (cxstack_ix > cxix) {
b0d9ce38 1469 SV *sv;
06b5626a 1470 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1471 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1472 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1473 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1474 switch (CxTYPE(cx)) {
c90c0ff4
PP
1475 case CXt_SUBST:
1476 POPSUBST(cx);
1477 continue; /* not break */
a0d0e21e 1478 case CXt_SUB:
b0d9ce38
GS
1479 POPSUB(cx,sv);
1480 LEAVESUB(sv);
a0d0e21e
LW
1481 break;
1482 case CXt_EVAL:
1483 POPEVAL(cx);
1484 break;
c6fdafd0 1485 case CXt_LOOP_LAZYIV:
d01136d6 1486 case CXt_LOOP_LAZYSV:
3b719c58
NC
1487 case CXt_LOOP_FOR:
1488 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1489 POPLOOP(cx);
1490 break;
0a753a76 1491 case CXt_NULL:
a0d0e21e 1492 break;
7766f137
GS
1493 case CXt_FORMAT:
1494 POPFORMAT(cx);
1495 break;
a0d0e21e 1496 }
c90c0ff4 1497 cxstack_ix--;
a0d0e21e 1498 }
1b6737cc 1499 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1500}
1501
5a844595
GS
1502void
1503Perl_qerror(pTHX_ SV *err)
1504{
97aff369 1505 dVAR;
7918f24d
NC
1506
1507 PERL_ARGS_ASSERT_QERROR;
1508
5a844595
GS
1509 if (PL_in_eval)
1510 sv_catsv(ERRSV, err);
1511 else if (PL_errors)
1512 sv_catsv(PL_errors, err);
1513 else
be2597df 1514 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1515 if (PL_parser)
1516 ++PL_parser->error_count;
5a844595
GS
1517}
1518
a0d0e21e 1519OP *
7d0994e0 1520Perl_die_where(pTHX_ SV *msv)
a0d0e21e 1521{
27da23d5 1522 dVAR;
87582a92 1523
3280af22 1524 if (PL_in_eval) {
a0d0e21e 1525 I32 cxix;
a0d0e21e 1526 I32 gimme;
a0d0e21e 1527
7d0994e0 1528 if (msv) {
faef0170 1529 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1530 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1531 SV * const err = ERRSV;
c445ea15 1532 const char *e = NULL;
98eae8f5 1533 if (!SvPOK(err))
76f68e9b 1534 sv_setpvs(err,"");
7d0994e0 1535 else if (SvCUR(err) >= sizeof(prefix)+SvCUR(msv)-1) {
0510663f 1536 STRLEN len;
7d0994e0
GG
1537 STRLEN msglen;
1538 const char* message = SvPV_const(msv, msglen);
349d4f2f 1539 e = SvPV_const(err, len);
0510663f 1540 e += len - msglen;
98eae8f5 1541 if (*e != *message || strNE(e,message))
c445ea15 1542 e = NULL;
98eae8f5
GS
1543 }
1544 if (!e) {
a2a5de95 1545 STRLEN start;
7d0994e0 1546 SvGROW(err, SvCUR(err)+sizeof(prefix)+SvCUR(msv));
98eae8f5 1547 sv_catpvn(err, prefix, sizeof(prefix)-1);
7d0994e0
GG
1548 sv_catsv(err, msv);
1549 start = SvCUR(err)-SvCUR(msv)-sizeof(prefix)+1;
a2a5de95
NC
1550 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "%s",
1551 SvPVX_const(err)+start);
4633a7c4 1552 }
4633a7c4 1553 }
1aa99e6b 1554 else {
7d0994e0
GG
1555 STRLEN msglen;
1556 const char* message = SvPV_const(msv, msglen);
06bf62c7 1557 sv_setpvn(ERRSV, message, msglen);
7d0994e0 1558 SvFLAGS(ERRSV) |= SvFLAGS(msv) & SVf_UTF8;
1aa99e6b 1559 }
4633a7c4 1560 }
4e6ea2c3 1561
5a844595
GS
1562 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1563 && PL_curstackinfo->si_prev)
1564 {
bac4b2ad 1565 dounwind(-1);
d3acc0f7 1566 POPSTACK;
bac4b2ad 1567 }
e336de0d 1568
a0d0e21e
LW
1569 if (cxix >= 0) {
1570 I32 optype;
35a4481c 1571 register PERL_CONTEXT *cx;
901017d6 1572 SV **newsp;
a0d0e21e
LW
1573
1574 if (cxix < cxstack_ix)
1575 dounwind(cxix);
1576
3280af22 1577 POPBLOCK(cx,PL_curpm);
6b35e009 1578 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0
GG
1579 STRLEN msglen;
1580 const char* message = SvPVx_const( msv ? msv : ERRSV, msglen);
10edeb5d 1581 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1582 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1583 my_exit(1);
1584 }
1585 POPEVAL(cx);
1586
1587 if (gimme == G_SCALAR)
3280af22
NIS
1588 *++newsp = &PL_sv_undef;
1589 PL_stack_sp = newsp;
a0d0e21e
LW
1590
1591 LEAVE;
748a9306 1592
7fb6a879
GS
1593 /* LEAVE could clobber PL_curcop (see save_re_context())
1594 * XXX it might be better to find a way to avoid messing with
1595 * PL_curcop in save_re_context() instead, but this is a more
1596 * minimal fix --GSAR */
1597 PL_curcop = cx->blk_oldcop;
1598
7a2e2cd6 1599 if (optype == OP_REQUIRE) {
44f8325f 1600 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1601 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1602 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1603 &PL_sv_undef, 0);
5a844595
GS
1604 DIE(aTHX_ "%sCompilation failed in require",
1605 *msg ? msg : "Unknown error\n");
7a2e2cd6 1606 }
f39bc417
DM
1607 assert(CxTYPE(cx) == CXt_EVAL);
1608 return cx->blk_eval.retop;
a0d0e21e
LW
1609 }
1610 }
87582a92 1611
7d0994e0 1612 write_to_stderr( msv ? msv : ERRSV );
f86702cc
PP
1613 my_failure_exit();
1614 /* NOTREACHED */
a0d0e21e
LW
1615 return 0;
1616}
1617
1618PP(pp_xor)
1619{
97aff369 1620 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1621 if (SvTRUE(left) != SvTRUE(right))
1622 RETSETYES;
1623 else
1624 RETSETNO;
1625}
1626
a0d0e21e
LW
1627PP(pp_caller)
1628{
97aff369 1629 dVAR;
39644a26 1630 dSP;
a0d0e21e 1631 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1632 register const PERL_CONTEXT *cx;
1633 register const PERL_CONTEXT *ccstack = cxstack;
1634 const PERL_SI *top_si = PL_curstackinfo;
54310121 1635 I32 gimme;
06b5626a 1636 const char *stashname;
a0d0e21e
LW
1637 I32 count = 0;
1638
1639 if (MAXARG)
1640 count = POPi;
27d41816 1641
a0d0e21e 1642 for (;;) {
2c375eb9
GS
1643 /* we may be in a higher stacklevel, so dig down deeper */
1644 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1645 top_si = top_si->si_prev;
1646 ccstack = top_si->si_cxstack;
1647 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1648 }
a0d0e21e 1649 if (cxix < 0) {
27d41816
DM
1650 if (GIMME != G_ARRAY) {
1651 EXTEND(SP, 1);
a0d0e21e 1652 RETPUSHUNDEF;
27d41816 1653 }
a0d0e21e
LW
1654 RETURN;
1655 }
f2a7f298 1656 /* caller() should not report the automatic calls to &DB::sub */
1657 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1658 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1659 count++;
1660 if (!count--)
1661 break;
2c375eb9 1662 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1663 }
2c375eb9
GS
1664
1665 cx = &ccstack[cxix];
7766f137 1666 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1667 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1668 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1669 field below is defined for any cx. */
f2a7f298 1670 /* caller() should not report the automatic calls to &DB::sub */
1671 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1672 cx = &ccstack[dbcxix];
06a5b730
PP
1673 }
1674
ed094faf 1675 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1676 if (GIMME != G_ARRAY) {
27d41816 1677 EXTEND(SP, 1);
ed094faf 1678 if (!stashname)
3280af22 1679 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1680 else {
1681 dTARGET;
ed094faf 1682 sv_setpv(TARG, stashname);
49d8d3a1
MB
1683 PUSHs(TARG);
1684 }
a0d0e21e
LW
1685 RETURN;
1686 }
a0d0e21e 1687
b3ca2e83 1688 EXTEND(SP, 11);
27d41816 1689
ed094faf 1690 if (!stashname)
3280af22 1691 PUSHs(&PL_sv_undef);
49d8d3a1 1692 else
6e449a3a
MHM
1693 mPUSHs(newSVpv(stashname, 0));
1694 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1695 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW
1696 if (!MAXARG)
1697 RETURN;
7766f137 1698 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1699 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1700 /* So is ccstack[dbcxix]. */
07b8c804 1701 if (isGV(cvgv)) {
561b68a9 1702 SV * const sv = newSV(0);
c445ea15 1703 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1704 mPUSHs(sv);
bf38a478 1705 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1706 }
1707 else {
84bafc02 1708 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1709 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1710 }
a0d0e21e
LW
1711 }
1712 else {
84bafc02 1713 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1714 mPUSHi(0);
a0d0e21e 1715 }
54310121
PP
1716 gimme = (I32)cx->blk_gimme;
1717 if (gimme == G_VOID)
3280af22 1718 PUSHs(&PL_sv_undef);
54310121 1719 else
98625aca 1720 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1721 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1722 /* eval STRING */
85a64632 1723 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1724 PUSHs(cx->blk_eval.cur_text);
3280af22 1725 PUSHs(&PL_sv_no);
0f79a09d 1726 }
811a4de9 1727 /* require */
0f79a09d 1728 else if (cx->blk_eval.old_namesv) {
6e449a3a 1729 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1730 PUSHs(&PL_sv_yes);
06a5b730 1731 }
811a4de9
GS
1732 /* eval BLOCK (try blocks have old_namesv == 0) */
1733 else {
1734 PUSHs(&PL_sv_undef);
1735 PUSHs(&PL_sv_undef);
1736 }
4633a7c4 1737 }
a682de96
GS
1738 else {
1739 PUSHs(&PL_sv_undef);
1740 PUSHs(&PL_sv_undef);
1741 }
bafb2adc 1742 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1743 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1744 {
66a1b24b
AL
1745 AV * const ary = cx->blk_sub.argarray;
1746 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1747
3280af22 1748 if (!PL_dbargs) {
af3885a0
NC
1749 PL_dbargs = GvAV(gv_AVadd(gv_fetchpvs("DB::args", GV_ADDMULTI,
1750 SVt_PVAV)));
3ddcf04c 1751 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1752 }
1753
3280af22
NIS
1754 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1755 av_extend(PL_dbargs, AvFILLp(ary) + off);
1756 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1757 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1758 }
f3aa04c2
GS
1759 /* XXX only hints propagated via op_private are currently
1760 * visible (others are not easily accessible, since they
1761 * use the global PL_hints) */
6e449a3a 1762 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1763 {
1764 SV * mask ;
72dc9ed5 1765 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1766
ac27b0f5 1767 if (old_warnings == pWARN_NONE ||
114bafba 1768 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1769 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1770 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1771 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1772 /* Get the bit mask for $warnings::Bits{all}, because
1773 * it could have been extended by warnings::register */
1774 SV **bits_all;
6673a63c 1775 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1776 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1777 mask = newSVsv(*bits_all);
1778 }
1779 else {
1780 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1781 }
1782 }
e476b1b5 1783 else
72dc9ed5 1784 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1785 mPUSHs(mask);
e476b1b5 1786 }
b3ca2e83 1787
c28fe1ec 1788 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1789 sv_2mortal(newRV_noinc(
ad64d0ec
NC
1790 MUTABLE_SV(Perl_refcounted_he_chain_2hv(aTHX_
1791 cx->blk_oldcop->cop_hints_hash))))
b3ca2e83 1792 : &PL_sv_undef);
a0d0e21e
LW
1793 RETURN;
1794}
1795
a0d0e21e
LW
1796PP(pp_reset)
1797{
97aff369 1798 dVAR;
39644a26 1799 dSP;
10edeb5d 1800 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1801 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1802 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1803 RETURN;
1804}
1805
dd2155a4
DM
1806/* like pp_nextstate, but used instead when the debugger is active */
1807
a0d0e21e
LW
1808PP(pp_dbstate)
1809{
27da23d5 1810 dVAR;
533c011a 1811 PL_curcop = (COP*)PL_op;
a0d0e21e 1812 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1813 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1814 FREETMPS;
1815
5df8de69
DM
1816 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1817 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1818 {
39644a26 1819 dSP;
c09156bb 1820 register PERL_CONTEXT *cx;
f54cb97a 1821 const I32 gimme = G_ARRAY;
eb160463 1822 U8 hasargs;
0bd48802
AL
1823 GV * const gv = PL_DBgv;
1824 register CV * const cv = GvCV(gv);
a0d0e21e 1825
a0d0e21e 1826 if (!cv)
cea2e8a9 1827 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1828
aea4f609
DM
1829 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1830 /* don't do recursive DB::DB call */
a0d0e21e 1831 return NORMAL;
748a9306 1832
4633a7c4
LW
1833 ENTER;
1834 SAVETMPS;
1835
3280af22 1836 SAVEI32(PL_debug);
55497cff 1837 SAVESTACK_POS();
3280af22 1838 PL_debug = 0;
748a9306 1839 hasargs = 0;
924508f0 1840 SPAGAIN;
748a9306 1841
aed2304a 1842 if (CvISXSUB(cv)) {
c127bd3a
SF
1843 CvDEPTH(cv)++;
1844 PUSHMARK(SP);
1845 (void)(*CvXSUB(cv))(aTHX_ cv);
1846 CvDEPTH(cv)--;
1847 FREETMPS;
1848 LEAVE;
1849 return NORMAL;
1850 }
1851 else {
1852 PUSHBLOCK(cx, CXt_SUB, SP);
1853 PUSHSUB_DB(cx);
1854 cx->blk_sub.retop = PL_op->op_next;
1855 CvDEPTH(cv)++;
1856 SAVECOMPPAD();
1857 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1858 RETURNOP(CvSTART(cv));
1859 }
a0d0e21e
LW
1860 }
1861 else
1862 return NORMAL;
1863}
1864
a0d0e21e
LW
1865PP(pp_enteriter)
1866{
27da23d5 1867 dVAR; dSP; dMARK;
c09156bb 1868 register PERL_CONTEXT *cx;
f54cb97a 1869 const I32 gimme = GIMME_V;
a0d0e21e 1870 SV **svp;
840fe433 1871 U8 cxtype = CXt_LOOP_FOR;
7766f137 1872#ifdef USE_ITHREADS
e846cb92 1873 PAD *iterdata;
7766f137 1874#endif
a0d0e21e 1875
4633a7c4
LW
1876 ENTER;
1877 SAVETMPS;
1878
533c011a 1879 if (PL_op->op_targ) {
14f338dc
DM
1880 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1881 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1882 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1883 SVs_PADSTALE, SVs_PADSTALE);
1884 }
09edbca0 1885 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
c3564e5c 1886#ifndef USE_ITHREADS
dd2155a4 1887 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
c3564e5c 1888#else
e846cb92 1889 iterdata = NULL;
7766f137 1890#endif
54b9620d
MB
1891 }
1892 else {
159b6efe 1893 GV * const gv = MUTABLE_GV(POPs);
7766f137 1894 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1895 SAVEGENERICSV(*svp);
561b68a9 1896 *svp = newSV(0);
7766f137 1897#ifdef USE_ITHREADS
e846cb92 1898 iterdata = (PAD*)gv;
7766f137 1899#endif
54b9620d 1900 }
4633a7c4 1901
0d863452
RH
1902 if (PL_op->op_private & OPpITER_DEF)
1903 cxtype |= CXp_FOR_DEF;
1904
a0d0e21e
LW
1905 ENTER;
1906
7766f137
GS
1907 PUSHBLOCK(cx, cxtype, SP);
1908#ifdef USE_ITHREADS
e846cb92 1909 PUSHLOOP_FOR(cx, iterdata, MARK, PL_op->op_targ);
7766f137 1910#else
52d1f6fb 1911 PUSHLOOP_FOR(cx, svp, MARK, 0);
7766f137 1912#endif
533c011a 1913 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
1914 SV *maybe_ary = POPs;
1915 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 1916 dPOPss;
d01136d6 1917 SV * const right = maybe_ary;
984a4bea
RD
1918 SvGETMAGIC(sv);
1919 SvGETMAGIC(right);
4fe3f0fa 1920 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 1921 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
1922 cx->cx_type |= CXt_LOOP_LAZYIV;
1923 /* Make sure that no-one re-orders cop.h and breaks our
1924 assumptions */
1925 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040
JH
1926#ifdef NV_PRESERVES_UV
1927 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1928 (SvNV(sv) > (NV)IV_MAX)))
1929 ||
1930 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1931 (SvNV(right) < (NV)IV_MIN))))
1932#else
1933 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1934 ||
1935 ((SvNV(sv) > 0) &&
1936 ((SvUV(sv) > (UV)IV_MAX) ||
1937 (SvNV(sv) > (NV)UV_MAX)))))
1938 ||
1939 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1940 ||
1941 ((SvNV(right) > 0) &&
1942 ((SvUV(right) > (UV)IV_MAX) ||
1943 (SvNV(right) > (NV)UV_MAX))))))
1944#endif
076d9a11 1945 DIE(aTHX_ "Range iterator outside integer range");
d01136d6
BS
1946 cx->blk_loop.state_u.lazyiv.cur = SvIV(sv);
1947 cx->blk_loop.state_u.lazyiv.end = SvIV(right);
d4665a05
DM
1948#ifdef DEBUGGING
1949 /* for correct -Dstv display */
1950 cx->blk_oldsp = sp - PL_stack_base;
1951#endif
89ea2908 1952 }
3f63a782 1953 else {
d01136d6
BS
1954 cx->cx_type &= ~CXTYPEMASK;
1955 cx->cx_type |= CXt_LOOP_LAZYSV;
1956 /* Make sure that no-one re-orders cop.h and breaks our
1957 assumptions */
1958 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
1959 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
1960 cx->blk_loop.state_u.lazysv.end = right;
1961 SvREFCNT_inc(right);
1962 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
1963 /* This will do the upgrade to SVt_PV, and warn if the value
1964 is uninitialised. */
10516c54 1965 (void) SvPV_nolen_const(right);
267cc4a8
NC
1966 /* Doing this avoids a check every time in pp_iter in pp_hot.c
1967 to replace !SvOK() with a pointer to "". */
1968 if (!SvOK(right)) {
1969 SvREFCNT_dec(right);
d01136d6 1970 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 1971 }
3f63a782 1972 }
89ea2908 1973 }
d01136d6 1974 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 1975 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS
1976 SvREFCNT_inc(maybe_ary);
1977 cx->blk_loop.state_u.ary.ix =
1978 (PL_op->op_private & OPpITER_REVERSED) ?
1979 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
1980 -1;
ef3e5ea9 1981 }
89ea2908 1982 }
d01136d6
BS
1983 else { /* iterating over items on the stack */
1984 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 1985 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 1986 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1987 }
1988 else {
d01136d6 1989 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 1990 }
4633a7c4 1991 }
a0d0e21e
LW
1992
1993 RETURN;
1994}
1995
1996PP(pp_enterloop)
1997{
27da23d5 1998 dVAR; dSP;
c09156bb 1999 register PERL_CONTEXT *cx;
f54cb97a 2000 const I32 gimme = GIMME_V;
a0d0e21e
LW
2001
2002 ENTER;
2003 SAVETMPS;
2004 ENTER;
2005
3b719c58
NC
2006 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2007 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
2008
2009 RETURN;
2010}
2011
2012PP(pp_leaveloop)
2013{
27da23d5 2014 dVAR; dSP;
c09156bb 2015 register PERL_CONTEXT *cx;
a0d0e21e
LW
2016 I32 gimme;
2017 SV **newsp;
2018 PMOP *newpm;
2019 SV **mark;
2020
2021 POPBLOCK(cx,newpm);
3b719c58 2022 assert(CxTYPE_is_LOOP(cx));
4fdae800 2023 mark = newsp;
a8bba7fa 2024 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2025
a1f49e72 2026 TAINT_NOT;
54310121 2027 if (gimme == G_VOID)
6f207bd3 2028 NOOP;
54310121
PP
2029 else if (gimme == G_SCALAR) {
2030 if (mark < SP)
2031 *++newsp = sv_mortalcopy(*SP);
2032 else
3280af22 2033 *++newsp = &PL_sv_undef;
a0d0e21e
LW
2034 }
2035 else {
a1f49e72 2036 while (mark < SP) {
a0d0e21e 2037 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
2038 TAINT_NOT; /* Each item is independent */
2039 }
a0d0e21e 2040 }
f86702cc
PP
2041 SP = newsp;
2042 PUTBACK;
2043
a8bba7fa 2044 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2045 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2046
a0d0e21e
LW
2047 LEAVE;
2048 LEAVE;
2049
f86702cc 2050 return NORMAL;
a0d0e21e
LW
2051}
2052
2053PP(pp_return)
2054{
27da23d5 2055 dVAR; dSP; dMARK;
c09156bb 2056 register PERL_CONTEXT *cx;
f86702cc 2057 bool popsub2 = FALSE;
b45de488 2058 bool clear_errsv = FALSE;
a0d0e21e
LW
2059 I32 gimme;
2060 SV **newsp;
2061 PMOP *newpm;
2062 I32 optype = 0;
b0d9ce38 2063 SV *sv;
f39bc417 2064 OP *retop;
a0d0e21e 2065
0bd48802
AL
2066 const I32 cxix = dopoptosub(cxstack_ix);
2067
9850bf21
RH
2068 if (cxix < 0) {
2069 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2070 * sort block, which is a CXt_NULL
2071 * not a CXt_SUB */
2072 dounwind(0);
d7507f74
RH
2073 PL_stack_base[1] = *PL_stack_sp;
2074 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2075 return 0;
2076 }
9850bf21
RH
2077 else
2078 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2079 }
a0d0e21e
LW
2080 if (cxix < cxstack_ix)
2081 dounwind(cxix);
2082
d7507f74
RH
2083 if (CxMULTICALL(&cxstack[cxix])) {
2084 gimme = cxstack[cxix].blk_gimme;
2085 if (gimme == G_VOID)
2086 PL_stack_sp = PL_stack_base;
2087 else if (gimme == G_SCALAR) {
2088 PL_stack_base[1] = *PL_stack_sp;
2089 PL_stack_sp = PL_stack_base + 1;
2090 }
9850bf21 2091 return 0;
d7507f74 2092 }
9850bf21 2093
a0d0e21e 2094 POPBLOCK(cx,newpm);
6b35e009 2095 switch (CxTYPE(cx)) {
a0d0e21e 2096 case CXt_SUB:
f86702cc 2097 popsub2 = TRUE;
f39bc417 2098 retop = cx->blk_sub.retop;
5dd42e15 2099 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2100 break;
2101 case CXt_EVAL:
b45de488
GS
2102 if (!(PL_in_eval & EVAL_KEEPERR))
2103 clear_errsv = TRUE;
a0d0e21e 2104 POPEVAL(cx);
f39bc417 2105 retop = cx->blk_eval.retop;
1d76a5c3
GS
2106 if (CxTRYBLOCK(cx))
2107 break;
067f92a0 2108 lex_end();
748a9306
LW
2109 if (optype == OP_REQUIRE &&
2110 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2111 {
54310121 2112 /* Unassume the success we assumed earlier. */
901017d6 2113 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2114 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2115 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2116 }
a0d0e21e 2117 break;
7766f137
GS
2118 case CXt_FORMAT:
2119 POPFORMAT(cx);
f39bc417 2120 retop = cx->blk_sub.retop;
7766f137 2121 break;
a0d0e21e 2122 default:
cea2e8a9 2123 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2124 }
2125
a1f49e72 2126 TAINT_NOT;
a0d0e21e 2127 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2128 if (MARK < SP) {
2129 if (popsub2) {
a8bba7fa 2130 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2131 if (SvTEMP(TOPs)) {
2132 *++newsp = SvREFCNT_inc(*SP);
2133 FREETMPS;
2134 sv_2mortal(*newsp);
959e3673
GS
2135 }
2136 else {
2137 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2138 FREETMPS;
959e3673
GS
2139 *++newsp = sv_mortalcopy(sv);
2140 SvREFCNT_dec(sv);
a29cdaf0 2141 }
959e3673
GS
2142 }
2143 else
a29cdaf0 2144 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2145 }
2146 else
a29cdaf0 2147 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2148 }
2149 else
3280af22 2150 *++newsp = &PL_sv_undef;
a0d0e21e 2151 }
54310121 2152 else if (gimme == G_ARRAY) {
a1f49e72 2153 while (++MARK <= SP) {
f86702cc
PP
2154 *++newsp = (popsub2 && SvTEMP(*MARK))
2155 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2156 TAINT_NOT; /* Each item is independent */
2157 }
a0d0e21e 2158 }
3280af22 2159 PL_stack_sp = newsp;
a0d0e21e 2160
5dd42e15 2161 LEAVE;
f86702cc
PP
2162 /* Stack values are safe: */
2163 if (popsub2) {
5dd42e15 2164 cxstack_ix--;
b0d9ce38 2165 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2166 }
b0d9ce38 2167 else
c445ea15 2168 sv = NULL;
3280af22 2169 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2170
b0d9ce38 2171 LEAVESUB(sv);
8433848b 2172 if (clear_errsv) {
ab69dbc2 2173 CLEAR_ERRSV();
8433848b 2174 }
f39bc417 2175 return retop;
a0d0e21e
LW
2176}
2177
2178PP(pp_last)
2179{
27da23d5 2180 dVAR; dSP;
a0d0e21e 2181 I32 cxix;
c09156bb 2182 register PERL_CONTEXT *cx;
f86702cc 2183 I32 pop2 = 0;
a0d0e21e 2184 I32 gimme;
8772537c 2185 I32 optype;
a0d0e21e
LW
2186 OP *nextop;
2187 SV **newsp;
2188 PMOP *newpm;
a8bba7fa 2189 SV **mark;
c445ea15 2190 SV *sv = NULL;
9d4ba2ae 2191
a0d0e21e 2192
533c011a 2193 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2194 cxix = dopoptoloop(cxstack_ix);
2195 if (cxix < 0)
a651a37d 2196 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2197 }
2198 else {
2199 cxix = dopoptolabel(cPVOP->op_pv);
2200 if (cxix < 0)
cea2e8a9 2201 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2202 }
2203 if (cxix < cxstack_ix)
2204 dounwind(cxix);
2205
2206 POPBLOCK(cx,newpm);
5dd42e15 2207 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2208 mark = newsp;
6b35e009 2209 switch (CxTYPE(cx)) {
c6fdafd0 2210 case CXt_LOOP_LAZYIV:
d01136d6 2211 case CXt_LOOP_LAZYSV:
3b719c58
NC
2212 case CXt_LOOP_FOR:
2213 case CXt_LOOP_PLAIN:
2214 pop2 = CxTYPE(cx);
a8bba7fa 2215 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2216 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2217 break;
f86702cc 2218 case CXt_SUB:
f86702cc 2219 pop2 = CXt_SUB;
f39bc417 2220 nextop = cx->blk_sub.retop;
a0d0e21e 2221 break;
f86702cc
PP
2222 case CXt_EVAL:
2223 POPEVAL(cx);
f39bc417 2224 nextop = cx->blk_eval.retop;
a0d0e21e 2225 break;
7766f137
GS
2226 case CXt_FORMAT:
2227 POPFORMAT(cx);
f39bc417 2228 nextop = cx->blk_sub.retop;
7766f137 2229 break;
a0d0e21e 2230 default:
cea2e8a9 2231 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2232 }
2233
a1f49e72 2234 TAINT_NOT;
a0d0e21e 2235 if (gimme == G_SCALAR) {
f86702cc
PP
2236 if (MARK < SP)
2237 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2238 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2239 else
3280af22 2240 *++newsp = &PL_sv_undef;
a0d0e21e 2241 }
54310121 2242 else if (gimme == G_ARRAY) {
a1f49e72 2243 while (++MARK <= SP) {
f86702cc
PP
2244 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2245 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2246 TAINT_NOT; /* Each item is independent */
2247 }
f86702cc
PP
2248 }
2249 SP = newsp;
2250 PUTBACK;
2251
5dd42e15
DM
2252 LEAVE;
2253 cxstack_ix--;
f86702cc
PP
2254 /* Stack values are safe: */
2255 switch (pop2) {
c6fdafd0 2256 case CXt_LOOP_LAZYIV:
3b719c58 2257 case CXt_LOOP_PLAIN:
d01136d6 2258 case CXt_LOOP_LAZYSV:
3b719c58 2259 case CXt_LOOP_FOR:
a8bba7fa 2260 POPLOOP(cx); /* release loop vars ... */
4fdae800 2261 LEAVE;
f86702cc
PP
2262 break;
2263 case CXt_SUB:
b0d9ce38 2264 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2265 break;
a0d0e21e 2266 }
3280af22 2267 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2268
b0d9ce38 2269 LEAVESUB(sv);
9d4ba2ae
AL
2270 PERL_UNUSED_VAR(optype);
2271 PERL_UNUSED_VAR(gimme);
f86702cc 2272 return nextop;
a0d0e21e
LW
2273}
2274
2275PP(pp_next)
2276{
27da23d5 2277 dVAR;
a0d0e21e 2278 I32 cxix;
c09156bb 2279 register PERL_CONTEXT *cx;
85538317 2280 I32 inner;
a0d0e21e 2281
533c011a 2282 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2283 cxix = dopoptoloop(cxstack_ix);
2284 if (cxix < 0)
a651a37d 2285 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2286 }
2287 else {
2288 cxix = dopoptolabel(cPVOP->op_pv);
2289 if (cxix < 0)
cea2e8a9 2290 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2291 }
2292 if (cxix < cxstack_ix)
2293 dounwind(cxix);
2294
85538317
GS
2295 /* clear off anything above the scope we're re-entering, but
2296 * save the rest until after a possible continue block */
2297 inner = PL_scopestack_ix;
1ba6ee2b 2298 TOPBLOCK(cx);
85538317
GS
2299 if (PL_scopestack_ix < inner)
2300 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2301 PL_curcop = cx->blk_oldcop;
022eaa24 2302 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2303}
2304
2305PP(pp_redo)
2306{
27da23d5 2307 dVAR;
a0d0e21e 2308 I32 cxix;
c09156bb 2309 register PERL_CONTEXT *cx;
a0d0e21e 2310 I32 oldsave;
a034e688 2311 OP* redo_op;
a0d0e21e 2312
533c011a 2313 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2314 cxix = dopoptoloop(cxstack_ix);
2315 if (cxix < 0)
a651a37d 2316 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2317 }
2318 else {
2319 cxix = dopoptolabel(cPVOP->op_pv);
2320 if (cxix < 0)
cea2e8a9 2321 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2322 }
2323 if (cxix < cxstack_ix)
2324 dounwind(cxix);
2325
022eaa24 2326 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2327 if (redo_op->op_type == OP_ENTER) {
2328 /* pop one less context to avoid $x being freed in while (my $x..) */
2329 cxstack_ix++;
2330 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2331 redo_op = redo_op->op_next;
2332 }
2333
a0d0e21e 2334 TOPBLOCK(cx);
3280af22 2335 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2336 LEAVE_SCOPE(oldsave);
936c78b5 2337 FREETMPS;
3a1b2b9e 2338 PL_curcop = cx->blk_oldcop;
a034e688 2339 return redo_op;
a0d0e21e
LW
2340}
2341
0824fdcb 2342STATIC OP *
bfed75c6 2343S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2344{
97aff369 2345 dVAR;
a0d0e21e 2346 OP **ops = opstack;
bfed75c6 2347 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2348
7918f24d
NC
2349 PERL_ARGS_ASSERT_DOFINDLABEL;
2350
fc36a67e 2351 if (ops >= oplimit)
cea2e8a9 2352 Perl_croak(aTHX_ too_deep);
11343788
MB
2353 if (o->op_type == OP_LEAVE ||
2354 o->op_type == OP_SCOPE ||
2355 o->op_type == OP_LEAVELOOP ||
33d34e4c 2356 o->op_type == OP_LEAVESUB ||
11343788 2357 o->op_type == OP_LEAVETRY)
fc36a67e 2358 {
5dc0d613 2359 *ops++ = cUNOPo->op_first;
fc36a67e 2360 if (ops >= oplimit)
cea2e8a9 2361 Perl_croak(aTHX_ too_deep);
fc36a67e 2362 }
c4aa4e48 2363 *ops = 0;
11343788 2364 if (o->op_flags & OPf_KIDS) {
aec46f14 2365 OP *kid;
a0d0e21e 2366 /* First try all the kids at this level, since that's likeliest. */
11343788 2367 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48 2368 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
4b65a919 2369 CopLABEL(kCOP) && strEQ(CopLABEL(kCOP), label))
a0d0e21e
LW
2370 return kid;
2371 }
11343788 2372 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2373 if (kid == PL_lastgotoprobe)
a0d0e21e 2374 continue;
ed8d0fe2
SM
2375 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2376 if (ops == opstack)
2377 *ops++ = kid;
2378 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2379 ops[-1]->op_type == OP_DBSTATE)
2380 ops[-1] = kid;
2381 else
2382 *ops++ = kid;
2383 }
155aba94 2384 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2385 return o;
a0d0e21e
LW
2386 }
2387 }
c4aa4e48 2388 *ops = 0;
a0d0e21e
LW
2389 return 0;
2390}
2391
a0d0e21e
LW
2392PP(pp_goto)
2393{
27da23d5 2394 dVAR; dSP;
cbbf8932 2395 OP *retop = NULL;
a0d0e21e 2396 I32 ix;
c09156bb 2397 register PERL_CONTEXT *cx;
fc36a67e
PP
2398#define GOTO_DEPTH 64
2399 OP *enterops[GOTO_DEPTH];
cbbf8932 2400 const char *label = NULL;
bfed75c6
AL
2401 const bool do_dump = (PL_op->op_type == OP_DUMP);
2402 static const char must_have_label[] = "goto must have label";
a0d0e21e 2403
533c011a 2404 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2405 SV * const sv = POPs;
a0d0e21e
LW
2406
2407 /* This egregious kludge implements goto &subroutine */
2408 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2409 I32 cxix;
c09156bb 2410 register PERL_CONTEXT *cx;
ea726b52 2411 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW
2412 SV** mark;
2413 I32 items = 0;
2414 I32 oldsave;
b1464ded 2415 bool reified = 0;
a0d0e21e 2416
e8f7dd13 2417 retry:
4aa0a1f7 2418 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2419 const GV * const gv = CvGV(cv);
e8f7dd13 2420 if (gv) {
7fc63493 2421 GV *autogv;
e8f7dd13
GS
2422 SV *tmpstr;
2423 /* autoloaded stub? */
2424 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2425 goto retry;
2426 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2427 GvNAMELEN(gv), FALSE);
2428 if (autogv && (cv = GvCV(autogv)))
2429 goto retry;
2430 tmpstr = sv_newmortal();
c445ea15 2431 gv_efullname3(tmpstr, gv, NULL);
be2597df 2432 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2433 }
cea2e8a9 2434 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2435 }
2436
a0d0e21e 2437 /* First do some returnish stuff. */
b37c2d43 2438 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2439 FREETMPS;
a0d0e21e
LW
2440 cxix = dopoptosub(cxstack_ix);
2441 if (cxix < 0)
cea2e8a9 2442 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2443 if (cxix < cxstack_ix)
2444 dounwind(cxix);
2445 TOPBLOCK(cx);
2d43a17f 2446 SPAGAIN;
564abe23 2447 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2448 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2449 if (CxREALEVAL(cx))
2450 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2451 else
2452 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2453 }
9850bf21
RH
2454 else if (CxMULTICALL(cx))
2455 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2456 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2457 /* put @_ back onto stack */
a0d0e21e 2458 AV* av = cx->blk_sub.argarray;
bfed75c6 2459
93965878 2460 items = AvFILLp(av) + 1;
a45cdc79
DM
2461 EXTEND(SP, items+1); /* @_ could have been extended. */
2462 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2463 SvREFCNT_dec(GvAV(PL_defgv));
2464 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2465 CLEAR_ARGARRAY(av);
d8b46c1b 2466 /* abandon @_ if it got reified */
62b1ebc2 2467 if (AvREAL(av)) {
b1464ded
DM
2468 reified = 1;
2469 SvREFCNT_dec(av);
d8b46c1b
GS
2470 av = newAV();
2471 av_extend(av, items-1);
11ca45c0 2472 AvREIFY_only(av);
ad64d0ec 2473 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2474 }
a0d0e21e 2475 }
aed2304a 2476 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2477 AV* const av = GvAV(PL_defgv);
1fa4e549 2478 items = AvFILLp(av) + 1;
a45cdc79
DM
2479 EXTEND(SP, items+1); /* @_ could have been extended. */
2480 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2481 }
a45cdc79
DM
2482 mark = SP;
2483 SP += items;
6b35e009 2484 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2485 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2486 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2487 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2488 LEAVE_SCOPE(oldsave);
2489
2490 /* Now do some callish stuff. */
2491 SAVETMPS;
5023d17a 2492 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2493 if (CvISXSUB(cv)) {
b37c2d43 2494 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2495 SV **newsp;
2496 I32 gimme;
b1464ded
DM
2497 if (reified) {
2498 I32 index;
2499 for (index=0; index<items; index++)
2500 sv_2mortal(SP[-index]);
2501 }
1fa4e549 2502
b37c2d43
AL
2503 /* XS subs don't have a CxSUB, so pop it */
2504 POPBLOCK(cx, PL_curpm);
2505 /* Push a mark for the start of arglist */
2506 PUSHMARK(mark);
2507 PUTBACK;
2508 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2509 LEAVE;
5eff7df7 2510 return retop;
a0d0e21e
LW
2511 }
2512 else {
b37c2d43 2513 AV* const padlist = CvPADLIST(cv);
6b35e009 2514 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2515 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2516 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2517 cx->cx_type = CXt_SUB;
b150fb22 2518 }
a0d0e21e 2519 cx->blk_sub.cv = cv;
1a5b3db4 2520 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2521
a0d0e21e
LW
2522 CvDEPTH(cv)++;
2523 if (CvDEPTH(cv) < 2)
74c765eb 2524 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2525 else {
2b9dff67 2526 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2527 sub_crush_depth(cv);
26019298 2528 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2529 }
fd617465
DM
2530 SAVECOMPPAD();
2531 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2532 if (CxHASARGS(cx))
6d4ff0d2 2533 {
502c6561 2534 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2535
3280af22 2536 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2537 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2538 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2539 cx->blk_sub.argarray = av;
a0d0e21e
LW
2540
2541 if (items >= AvMAX(av) + 1) {
b37c2d43 2542 SV **ary = AvALLOC(av);
a0d0e21e
LW
2543 if (AvARRAY(av) != ary) {
2544 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2545 AvARRAY(av) = ary;
a0d0e21e
LW
2546 }
2547 if (items >= AvMAX(av) + 1) {
2548 AvMAX(av) = items - 1;
2549 Renew(ary,items+1,SV*);
2550 AvALLOC(av) = ary;
9c6bc640 2551 AvARRAY(av) = ary;
a0d0e21e
LW
2552 }
2553 }
a45cdc79 2554 ++mark;
a0d0e21e 2555 Copy(mark,AvARRAY(av),items,SV*);
93965878 2556 AvFILLp(av) = items - 1;
d8b46c1b 2557 assert(!AvREAL(av));
b1464ded
DM
2558 if (reified) {
2559 /* transfer 'ownership' of refcnts to new @_ */
2560 AvREAL_on(av);
2561 AvREIFY_off(av);
2562 }
a0d0e21e
LW
2563 while (items--) {
2564 if (*mark)
2565 SvTEMP_off(*mark);
2566 mark++;
2567 }
2568 }
491527d0 2569 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2570 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2571 if (PERLDB_GOTO) {
b96d8cd9 2572 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL
2573 if (gotocv) {
2574 PUSHMARK( PL_stack_sp );
ad64d0ec 2575 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL
2576 PL_stack_sp--;
2577 }
491527d0 2578 }
1ce6579f 2579 }
a0d0e21e
LW
2580 RETURNOP(CvSTART(cv));
2581 }
2582 }
1614b0e3 2583 else {
0510663f 2584 label = SvPV_nolen_const(sv);
1614b0e3 2585 if (!(do_dump || *label))
cea2e8a9 2586 DIE(aTHX_ must_have_label);
1614b0e3 2587 }
a0d0e21e 2588 }
533c011a 2589 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2590 if (! do_dump)
cea2e8a9 2591 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2592 }
2593 else
2594 label = cPVOP->op_pv;
2595
2596 if (label && *label) {
cbbf8932 2597 OP *gotoprobe = NULL;
3b2447bc 2598 bool leaving_eval = FALSE;
33d34e4c 2599 bool in_block = FALSE;
cbbf8932 2600 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2601
2602 /* find label */
2603
d4c19fe8 2604 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2605 *enterops = 0;
2606 for (ix = cxstack_ix; ix >= 0; ix--) {
2607 cx = &cxstack[ix];
6b35e009 2608 switch (CxTYPE(cx)) {
a0d0e21e 2609 case CXt_EVAL:
3b2447bc 2610 leaving_eval = TRUE;
971ecbe6 2611 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2612 gotoprobe = (last_eval_cx ?
2613 last_eval_cx->blk_eval.old_eval_root :
2614 PL_eval_root);
2615 last_eval_cx = cx;
9c5794fe
RH
2616 break;
2617 }
2618 /* else fall through */
c6fdafd0 2619 case CXt_LOOP_LAZYIV:
d01136d6 2620 case CXt_LOOP_LAZYSV:
3b719c58
NC
2621 case CXt_LOOP_FOR:
2622 case CXt_LOOP_PLAIN:
bb5aedc1
VP
2623 case CXt_GIVEN:
2624 case CXt_WHEN:
a0d0e21e
LW
2625 gotoprobe = cx->blk_oldcop->op_sibling;
2626 break;
2627 case CXt_SUBST:
2628 continue;
2629 case CXt_BLOCK:
33d34e4c 2630 if (ix) {
a0d0e21e 2631 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2632 in_block = TRUE;
2633 } else
3280af22 2634 gotoprobe = PL_main_root;
a0d0e21e 2635 break;
b3933176 2636 case CXt_SUB:
9850bf21 2637 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2638 gotoprobe = CvROOT(cx->blk_sub.cv);
2639 break;
2640 }
2641 /* FALL THROUGH */
7766f137 2642 case CXt_FORMAT:
0a753a76 2643 case CXt_NULL:
a651a37d 2644 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2645 default:
2646 if (ix)
cea2e8a9 2647 DIE(aTHX_ "panic: goto");
3280af22 2648 gotoprobe = PL_main_root;
a0d0e21e
LW
2649 break;
2650 }
2b597662
GS
2651 if (gotoprobe) {
2652 retop = dofindlabel(gotoprobe, label,
2653 enterops, enterops + GOTO_DEPTH);
2654 if (retop)
2655 break;
2656 }
3280af22 2657 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2658 }
2659 if (!retop)
cea2e8a9 2660 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2661
3b2447bc
RH
2662 /* if we're leaving an eval, check before we pop any frames
2663 that we're not going to punt, otherwise the error
2664 won't be caught */
2665
2666 if (leaving_eval && *enterops && enterops[1]) {
2667 I32 i;
2668 for (i = 1; enterops[i]; i++)
2669 if (enterops[i]->op_type == OP_ENTERITER)
2670 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2671 }
2672
a0d0e21e
LW
2673 /* pop unwanted frames */
2674
2675 if (ix < cxstack_ix) {
2676 I32 oldsave;
2677
2678 if (ix < 0)
2679 ix = 0;
2680 dounwind(ix);
2681 TOPBLOCK(cx);
3280af22 2682 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2683 LEAVE_SCOPE(oldsave);
2684 }
2685
2686 /* push wanted frames */
2687
748a9306 2688 if (*enterops && enterops[1]) {
0bd48802 2689 OP * const oldop = PL_op;
33d34e4c
AE
2690 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2691 for (; enterops[ix]; ix++) {
533c011a 2692 PL_op = enterops[ix];
84902520
TB
2693 /* Eventually we may want to stack the needed arguments
2694 * for each op. For now, we punt on the hard ones. */
533c011a 2695 if (PL_op->op_type == OP_ENTERITER)
894356b3 2696 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2697 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2698 }
533c011a 2699 PL_op = oldop;
a0d0e21e
LW
2700 }
2701 }
2702
2703 if (do_dump) {
a5f75d66 2704#ifdef VMS
6b88bc9c 2705 if (!retop) retop = PL_main_start;
a5f75d66 2706#endif
3280af22
NIS
2707 PL_restartop = retop;
2708 PL_do_undump = TRUE;
a0d0e21e
LW
2709
2710 my_unexec();
2711
3280af22
NIS
2712 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2713 PL_do_undump = FALSE;
a0d0e21e
LW
2714 }
2715
2716 RETURNOP(retop);
2717}
2718
2719PP(pp_exit)
2720{
97aff369 2721 dVAR;
39644a26 2722 dSP;
a0d0e21e
LW
2723 I32 anum;
2724
2725 if (MAXARG < 1)
2726 anum = 0;
ff0cee69 2727 else {
a0d0e21e 2728 anum = SvIVx(POPs);
d98f61e7
GS
2729#ifdef VMS
2730 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2731 anum = 0;
96e176bf 2732 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2733#endif
2734 }
cc3604b1 2735 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2736#ifdef PERL_MAD
2737 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2738 if (anum || !(PL_minus_c && PL_madskills))
2739 my_exit(anum);
2740#else
a0d0e21e 2741 my_exit(anum);
81d86705 2742#endif
3280af22 2743 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2744 RETURN;
2745}
2746
a0d0e21e
LW
2747/* Eval. */
2748
0824fdcb 2749STATIC void
cea2e8a9 2750S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2751{
504618e9 2752 const char *s = SvPVX_const(sv);
890ce7af 2753 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2754 I32 line = 1;
a0d0e21e 2755
7918f24d
NC
2756 PERL_ARGS_ASSERT_SAVE_LINES;
2757
a0d0e21e 2758 while (s && s < send) {
f54cb97a 2759 const char *t;
b9f83d2f 2760 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2761
1d963ff3 2762 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW
2763 if (t)
2764 t++;
2765 else
2766 t = send;
2767
2768 sv_setpvn(tmpstr, s, t - s);
2769 av_store(array, line++, tmpstr);
2770 s = t;
2771 }
2772}
2773
0824fdcb 2774STATIC OP *
cea2e8a9 2775S_docatch(pTHX_ OP *o)
1e422769 2776{
97aff369 2777 dVAR;
6224f72b 2778 int ret;
06b5626a 2779 OP * const oldop = PL_op;
db36c5a1 2780 dJMPENV;
1e422769 2781
1e422769 2782#ifdef DEBUGGING
54310121 2783 assert(CATCH_GET == TRUE);
1e422769 2784#endif
312caa8e 2785 PL_op = o;
8bffa5f8 2786
14dd3ad8 2787 JMPENV_PUSH(ret);
6224f72b 2788 switch (ret) {
312caa8e 2789 case 0:
abd70938
DM
2790 assert(cxstack_ix >= 0);
2791 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2792 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2793 redo_body:
85aaa934 2794 CALLRUNOPS(aTHX);
312caa8e
CS
2795 break;
2796 case 3:
8bffa5f8 2797 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2798
2799 /* NB XXX we rely on the old popped CxEVAL still being at the top
2800 * of the stack; the way die_where() currently works, this
2801 * assumption is valid. In theory The cur_top_env value should be
2802 * returned in another global, the way retop (aka PL_restartop)
2803 * is. */
2804 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2805
2806 if (PL_restartop
2807 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2808 {
312caa8e
CS
2809 PL_op = PL_restartop;
2810 PL_restartop = 0;
2811 goto redo_body;
2812 }
2813 /* FALL THROUGH */
2814 default:
14dd3ad8 2815 JMPENV_POP;
533c011a 2816 PL_op = oldop;
6224f72b 2817 JMPENV_JUMP(ret);
1e422769 2818 /* NOTREACHED */
1e422769 2819 }
14dd3ad8 2820 JMPENV_POP;
533c011a 2821 PL_op = oldop;
5f66b61c 2822 return NULL;
1e422769
PP
2823}
2824
c277df42 2825OP *
bfed75c6 2826Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2827/* sv Text to convert to OP tree. */
2828/* startop op_free() this to undo. */
2829/* code Short string id of the caller. */
2830{
f7997f86 2831 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2832 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2833 PERL_CONTEXT *cx;
2834 SV **newsp;
b094c71d 2835 I32 gimme = G_VOID;
c277df42
IZ
2836 I32 optype;
2837 OP dummy;
83ee9e09
GS
2838 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2839 char *tmpbuf = tbuf;
c277df42 2840 char *safestr;
a3985cdc 2841 int runtime;
601f1833 2842 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2843 STRLEN len;
c277df42 2844
7918f24d
NC
2845 PERL_ARGS_ASSERT_SV_COMPILE_2OP;
2846
c277df42 2847 ENTER;
5486870f 2848 lex_start(sv, NULL, FALSE);
c277df42
IZ
2849 SAVETMPS;
2850 /* switch to eval mode */
2851
923e4eb5 2852 if (IN_PERL_COMPILETIME) {
f4dd75d9 2853 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2854 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2855 }
83ee9e09 2856 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2857 SV * const sv = sv_newmortal();
83ee9e09
GS
2858 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2859 code, (unsigned long)++PL_evalseq,
2860 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2861 tmpbuf = SvPVX(sv);
fc009855 2862 len = SvCUR(sv);
83ee9e09
GS
2863 }
2864 else
d9fad198
JH
2865 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2866 (unsigned long)++PL_evalseq);
f4dd75d9 2867 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2868 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2869 SAVECOPLINE(&PL_compiling);
57843af0 2870 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2871 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2872 deleting the eval's FILEGV from the stash before gv_check() runs
2873 (i.e. before run-time proper). To work around the coredump that
2874 ensues, we always turn GvMULTI_on for any globals that were
2875 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2876 safestr = savepvn(tmpbuf, len);
2877 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2878 SAVEHINTS();
d1ca3daa 2879#ifdef OP_IN_REGISTER
6b88bc9c 2880 PL_opsave = op;
d1ca3daa 2881#else
7766f137 2882 SAVEVPTR(PL_op);
d1ca3daa 2883#endif
c277df42 2884
a3985cdc 2885 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2886 runtime = IN_PERL_RUNTIME;
a3985cdc 2887 if (runtime)
d819b83a 2888 runcv = find_runcv(NULL);
a3985cdc 2889
533c011a 2890 PL_op = &dummy;
13b51b79 2891 PL_op->op_type = OP_ENTEREVAL;
533c011a 2892 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2893 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 2894 PUSHEVAL(cx, 0);
a3985cdc
DM
2895
2896 if (runtime)
410be5db 2897 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2898 else
410be5db 2899 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2900 POPBLOCK(cx,PL_curpm);
e84b9f1f 2901 POPEVAL(cx);
c277df42
IZ
2902
2903 (*startop)->op_type = OP_NULL;
22c35a8c 2904 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2905 lex_end();
f3548bdc 2906 /* XXX DAPM do this properly one year */
502c6561 2907 *padp = MUTABLE_AV(SvREFCNT_inc_simple(PL_comppad));
c277df42 2908 LEAVE;
923e4eb5 2909 if (IN_PERL_COMPILETIME)
623e6609 2910 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2911#ifdef OP_IN_REGISTER
6b88bc9c 2912 op = PL_opsave;
d1ca3daa 2913#endif
9d4ba2ae
AL
2914 PERL_UNUSED_VAR(newsp);
2915 PERL_UNUSED_VAR(optype);
2916
410be5db 2917 return PL_eval_start;
c277df42
IZ
2918}
2919
a3985cdc
DM
2920
2921/*
2922=for apidoc find_runcv
2923
2924Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2925If db_seqp is non_null, skip CVs that are in the DB package and populate
2926*db_seqp with the cop sequence number at the point that the DB:: code was
2927entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2928than in the scope of the debugger itself).
a3985cdc
DM
2929
2930=cut
2931*/
2932
2933CV*
d819b83a 2934Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2935{
97aff369 2936 dVAR;
a3985cdc 2937 PERL_SI *si;
a3985cdc 2938
d819b83a
DM
2939 if (db_seqp)
2940 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2941 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2942 I32 ix;
a3985cdc 2943 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2944 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2945 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2946 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2947 /* skip DB:: code */
2948 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2949 *db_seqp = cx->blk_oldcop->cop_seq;
2950 continue;
2951 }
2952 return cv;
2953 }
a3985cdc
DM
2954 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2955 return PL_compcv;
2956 }
2957 }
2958 return PL_main_cv;
2959}
2960
2961
2962/* Compile a require/do, an eval '', or a /(?{...})/.
2963 * In the last case, startop is non-null, and contains the address of
2964 * a pointer that should be set to the just-compiled code.
2965 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM
2966 * Returns a bool indicating whether the compile was successful; if so,
2967 * PL_eval_start contains the first op of the compiled ocde; otherwise,
2968 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM
2969 */
2970
410be5db 2971STATIC bool
a3985cdc 2972S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2973{
27da23d5 2974 dVAR; dSP;
46c461b5 2975 OP * const saveop = PL_op;
a0d0e21e 2976
6dc8a9e4
IZ
2977 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2978 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2979 : EVAL_INEVAL);
a0d0e21e 2980
1ce6579f
PP
2981 PUSHMARK(SP);
2982
3280af22 2983 SAVESPTR(PL_compcv);
ea726b52 2984 PL_compcv = MUTABLE_CV(newSV_type(SVt_PVCV));
1aff0e91 2985 CvEVAL_on(PL_compcv);
2090ab20
JH
2986 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2987 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2988
a3985cdc 2989 CvOUTSIDE_SEQ(PL_compcv) = seq;
ea726b52 2990 CvOUTSIDE(PL_compcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 2991
dd2155a4 2992 /* set up a scratch pad */
a0d0e21e 2993
dd2155a4 2994 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2995 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2996
07055b4c 2997
81d86705
NC
2998 if (!PL_madskills)
2999 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 3000
a0d0e21e
LW
3001 /* make sure we compile in the right package */
3002
ed094faf 3003 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 3004 SAVESPTR(PL_curstash);
ed094faf 3005 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 3006 }
3c10abe3 3007 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
3008 SAVESPTR(PL_beginav);
3009 PL_beginav = newAV();
3010 SAVEFREESV(PL_beginav);
3c10abe3
AG
3011 SAVESPTR(PL_unitcheckav);
3012 PL_unitcheckav = newAV();
3013 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3014
81d86705 3015#ifdef PERL_MAD
9da243ce 3016 SAVEBOOL(PL_madskills);
81d86705
NC
3017 PL_madskills = 0;
3018#endif
3019
a0d0e21e
LW
3020 /* try to compile it */
3021
5f66b61c 3022 PL_eval_root = NULL;
3280af22 3023 PL_curcop = &PL_compiling;
fc15ae8f 3024 CopARYBASE_set(PL_curcop, 0);
5f66b61c 3025 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3026 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS
3027 else
3028 CLEAR_ERRSV();
13765c85 3029 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 3030 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 3031 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 3032 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 3033 const char *msg;
bfed75c6 3034
533c011a 3035 PL_op = saveop;
3280af22
NIS
3036 if (PL_eval_root) {
3037 op_free(PL_eval_root);
5f66b61c 3038 PL_eval_root = NULL;
a0d0e21e 3039 }
3280af22 3040 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 3041 if (!startop) {
3280af22 3042 POPBLOCK(cx,PL_curpm);
c277df42 3043 POPEVAL(cx);
c277df42 3044 }
a0d0e21e 3045 lex_end();
f9bddea7 3046 LEAVE; /* pp_entereval knows about this LEAVE. */
9d4ba2ae
AL
3047
3048 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 3049 if (optype == OP_REQUIRE) {
b464bac0 3050 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 3051 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 3052 &PL_sv_undef, 0);
58d3fd3b
SH
3053 Perl_croak(aTHX_ "%sCompilation failed in require",
3054 *msg ? msg : "Unknown error\n");
5a844595
GS
3055 }
3056 else if (startop) {
3280af22 3057 POPBLOCK(cx,PL_curpm);
c277df42 3058 POPEVAL(cx);
5a844595
GS
3059 Perl_croak(aTHX_ "%sCompilation failed in regexp",
3060 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 3061 }
9d7f88dd 3062 else {
9d7f88dd 3063 if (!*msg) {
6502358f 3064 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
3065 }
3066 }
9d4ba2ae 3067 PERL_UNUSED_VAR(newsp);
410be5db
DM
3068 PUSHs(&PL_sv_undef);
3069 PUTBACK;
3070 return FALSE;
a0d0e21e 3071 }
57843af0 3072 CopLINE_set(&PL_compiling, 0);
c277df42 3073 if (startop) {
3280af22 3074 *startop = PL_eval_root;
c277df42 3075 } else
3280af22 3076 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
3077
3078 /* Set the context for this new optree.
3079 * If the last op is an OP_REQUIRE, force scalar context.
3080 * Otherwise, propagate the context from the eval(). */
3081 if (PL_eval_root->op_type == OP_LEAVEEVAL
3082 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
3083 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
3084 == OP_REQUIRE)
3085 scalar(PL_eval_root);
7df0357e 3086 else if ((gimme & G_WANT) == G_VOID)
3280af22 3087 scalarvoid(PL_eval_root);
7df0357e 3088 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3089 list(PL_eval_root);
a0d0e21e 3090 else
3280af22 3091 scalar(PL_eval_root);
a0d0e21e
LW
3092
3093 DEBUG_x(dump_eval());
3094
55497cff 3095 /* Register with debugger: */
6482a30d 3096 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
b96d8cd9 3097 CV * const cv = get_cvs("DB::postponed", 0);
55497cff
PP
3098 if (cv) {
3099 dSP;
924508f0 3100 PUSHMARK(SP);
ad64d0ec 3101 XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling)));
55497cff 3102 PUTBACK;
ad64d0ec 3103 call_sv(MUTABLE_SV(cv), G_DISCARD);
55497cff
PP
3104 }
3105 }
3106
3c10abe3
AG
3107 if (PL_unitcheckav)
3108 call_list(PL_scopestack_ix, PL_unitcheckav);
3109
a0d0e21e
LW
3110 /* compiled okay, so do it */
3111
3280af22
NIS
3112 CvDEPTH(PL_compcv) = 1;
3113 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3114 PL_op = saveop; /* The caller may need it. */
bc177e6b 3115 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3116
410be5db
DM
3117 PUTBACK;
3118 return TRUE;
a0d0e21e
LW
3119}
3120
a6c40364 3121STATIC PerlIO *
0786552a 3122S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP
3123{
3124 Stat_t st;
c445ea15 3125 const int st_rc = PerlLIO_stat(name, &st);
df528165 3126
7918f24d
NC
3127 PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN;
3128
6b845e56 3129 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3130 return NULL;
ce8abf5f
SP
3131 }
3132
0786552a 3133 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP
3134}
3135
75c20bac 3136#ifndef PERL_DISABLE_PMC
ce8abf5f 3137STATIC PerlIO *
0786552a 3138S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3139{
b295d113
TH
3140 PerlIO *fp;
3141
7918f24d
NC
3142 PERL_ARGS_ASSERT_DOOPEN_PM;
3143
ce9440c8 3144 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC
3145 SV *const pmcsv = newSV(namelen + 2);
3146 char *const pmc = SvPVX(pmcsv);
a6c40364 3147 Stat_t pmcstat;
50b8ed39
NC
3148
3149 memcpy(pmc, name, namelen);
3150 pmc[namelen] = 'c';
3151 pmc[namelen + 1] = '\0';
3152
a6c40364 3153 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3154 fp = check_type_and_open(name);
a6c40364
GS
3155 }
3156 else {
0786552a 3157 fp = check_type_and_open(pmc);
b295d113 3158 }
a6c40364
GS
3159 SvREFCNT_dec(pmcsv);
3160 }
3161 else {
0786552a 3162 fp = check_type_and_open(name);
b295d113 3163 }
b295d113 3164 return fp;
75c20bac 3165}
7925835c 3166#else
75c20bac 3167# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3168#endif /* !PERL_DISABLE_PMC */
b295d113 3169
a0d0e21e
LW
3170PP(pp_require)
3171{
27da23d5 3172 dVAR; dSP;
c09156bb 3173 register PERL_CONTEXT *cx;
a0d0e21e 3174 SV *sv;
5c144d81 3175 const char *name;
6132ea6c 3176 STRLEN len;
4492be7a
JM
3177 char * unixname;
3178 STRLEN unixlen;
62f5ad7a 3179#ifdef VMS
4492be7a 3180 int vms_unixname = 0;
62f5ad7a 3181#endif
c445ea15
AL
3182 const char *tryname = NULL;
3183 SV *namesv = NULL;
f54cb97a 3184 const I32 gimme = GIMME_V;
bbed91b5 3185 int filter_has_file = 0;
c445ea15 3186 PerlIO *tryrsfp = NULL;
34113e50 3187 SV *filter_cache = NULL;
c445ea15
AL
3188 SV *filter_state = NULL;
3189 SV *filter_sub = NULL;
3190 SV *hook_sv = NULL;
6ec9efec
JH
3191 SV *encoding;
3192 OP *op;
a0d0e21e
LW
3193
3194 sv = POPs;
d7aa5382 3195 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP
3196 sv = new_version(sv);
3197 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3198 upg_version(PL_patchlevel, TRUE);
149c1637 3199 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3200 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3201 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3202 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3203 }
3204 else {
d1029faa
JP
3205 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3206 I32 first = 0;
3207 AV *lav;
3208 SV * const req = SvRV(sv);
85fbaab2 3209 SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE);
d1029faa
JP
3210
3211 /* get the left hand term */
502c6561 3212 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE)));
d1029faa
JP
3213
3214 first = SvIV(*av_fetch(lav,0,0));
3215 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
85fbaab2 3216 || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
d1029faa
JP
3217 || av_len(lav) > 1 /* FP with > 3 digits */
3218 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3219 ) {
3220 DIE(aTHX_ "Perl %"SVf" required--this is only "
3221 "%"SVf", stopped", SVfARG(vnormal(req)),
3222 SVfARG(vnormal(PL_patchlevel)));
3223 }
3224 else { /* probably 'use 5.10' or 'use 5.8' */
3225 SV * hintsv = newSV(0);
3226 I32 second = 0;
3227
3228 if (av_len(lav)>=1)
3229 second = SvIV(*av_fetch(lav,1,0));
3230
3231 second /= second >= 600 ? 100 : 10;
3232 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.%d",
3233 (int)first, (int)second,0);
3234 upg_version(hintsv, TRUE);
3235
3236 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3237 "--this is only %"SVf", stopped",
3238 SVfARG(vnormal(req)),
3239 SVfARG(vnormal(hintsv)),
3240 SVfARG(vnormal(PL_patchlevel)));
3241 }
3242 }
468aa647 3243 }
d7aa5382 3244
fbc891ce
RB
3245 /* We do this only with use, not require. */
3246 if (PL_compcv &&
fbc891ce
RB
3247 /* If we request a version >= 5.9.5, load feature.pm with the
3248 * feature bundle that corresponds to the required version. */
2e8342de 3249 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3250 SV *const importsv = vnormal(sv);
3251 *SvPVX_mutable(importsv) = ':';
3252 ENTER;
3253 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3254 LEAVE;
3255 }
53eb19dd
SM
3256 /* If a version >= 5.11.0 is requested, strictures are on by default! */
3257 if (PL_compcv &&
3258 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.011000), FALSE))) >= 0) {
5cc917d6 3259 PL_hints |= (HINT_STRICT_REFS | HINT_STRICT_SUBS | HINT_STRICT_VARS);
53eb19dd
SM
3260 }
3261
7dfde25d 3262 RETPUSHYES;
a0d0e21e 3263 }
5c144d81 3264 name = SvPV_const(sv, len);
6132ea6c 3265 if (!(name && len > 0 && *name))
cea2e8a9 3266 DIE(aTHX_ "Null filename used");
4633a7c4 3267 TAINT_PROPER("require");
4492be7a
JM
3268
3269
3270#ifdef VMS
3271 /* The key in the %ENV hash is in the syntax of file passed as the argument
3272 * usually this is in UNIX format, but sometimes in VMS format, which
3273 * can result in a module being pulled in more than once.
3274 * To prevent this, the key must be stored in UNIX format if the VMS
3275 * name can be translated to UNIX.
3276 */
3277 if ((unixname = tounixspec(name, NULL)) != NULL) {
3278 unixlen = strlen(unixname);
3279 vms_unixname = 1;
3280 }
3281 else
3282#endif
3283 {
3284 /* if not VMS or VMS name can not be translated to UNIX, pass it
3285 * through.
3286 */
3287 unixname = (char *) name;
3288 unixlen = len;
3289 }
44f8325f 3290 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM
3291 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3292 unixname, unixlen, 0);
44f8325f
AL
3293 if ( svp ) {
3294 if (*svp != &PL_sv_undef)
3295 RETPUSHYES;
3296 else
087b5369
RD
3297 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3298 "Compilation failed in require", unixname);
44f8325f 3299 }
4d8b06f1 3300 }
a0d0e21e
LW
3301
3302 /* prepare to compile file */
3303
be4b629d 3304 if (path_is_absolute(name)) {
46fc3d4c 3305 tryname = name;
0786552a 3306 tryrsfp = doopen_pm(name, len);
bf4acbe4 3307 }
be4b629d 3308 if (!tryrsfp) {
44f8325f 3309 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3310 I32 i;
748a9306 3311#ifdef VMS
4492be7a 3312 if (vms_unixname)
46fc3d4c
PP
3313#endif
3314 {
d0328fd7 3315 namesv = newSV_type(SVt_PV);
46fc3d4c 3316 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3317 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3318
ad64d0ec 3319 if (SvTIED_mg((const SV *)ar, PERL_MAGIC_tied))
c38a6530 3320 mg_get(dirsv);
bbed91b5
KF
3321 if (SvROK(dirsv)) {
3322 int count;
a3b58a99 3323 SV **svp;
bbed91b5
KF
3324 SV *loader = dirsv;
3325
e14e2dc8
NC
3326 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3327 && !sv_isobject(loader))
3328 {
502c6561 3329 loader = *av_fetch(MUTABLE_AV(SvRV(loader)), 0, TRUE);
bbed91b5
KF
3330 }
3331
b900a521 3332 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3333 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3334 tryname = SvPVX_const(namesv);
c445ea15 3335 tryrsfp = NULL;
bbed91b5
KF
3336
3337 ENTER;
3338 SAVETMPS;
3339 EXTEND(SP, 2);
3340
3341 PUSHMARK(SP);
3342 PUSHs(dirsv);
3343 PUSHs(sv);
3344 PUTBACK;
e982885c
NC
3345 if (sv_isobject(loader))
3346 count = call_method("INC", G_ARRAY);
3347 else
3348 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3349 SPAGAIN;
3350
a3b58a99
RGS
3351 /* Adjust file name if the hook has set an %INC entry */
3352 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3353 if (svp)
d8723a6a 3354 tryname = SvPV_nolen_const(*svp);
a3b58a99 3355
bbed91b5
KF
3356 if (count > 0) {
3357 int i = 0;
3358 SV *arg;
3359
3360 SP -= count - 1;
3361 arg = SP[i++];
3362
34113e50
NC
3363 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3364 && !isGV_with_GP(SvRV(arg))) {
3365 filter_cache = SvRV(arg);
74c765eb 3366 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3367
3368 if (i < count) {
3369 arg = SP[i++];
3370 }
3371 }
3372
6e592b3a 3373 if (SvROK(arg) && isGV_with_GP(SvRV(arg))) {
bbed91b5
KF
3374 arg = SvRV(arg);
3375 }
3376
6e592b3a 3377 if (isGV_with_GP(arg)) {
159b6efe 3378 IO * const io = GvIO((const GV *)arg);
bbed91b5
KF
3379
3380 ++filter_has_file;
3381
3382 if (io) {
3383 tryrsfp = IoIFP(io);
0f7de14d
NC
3384 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3385 PerlIO_close(IoOFP(io));
bbed91b5<