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Re: INC handlers and shutdown-time warnings
[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW
1/* pp_ctl.c
2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 */
19
166f8a29
DM
20/* This file contains control-oriented pp ("push/pop") functions that
21 * execute the opcodes that make up a perl program. A typical pp function
22 * expects to find its arguments on the stack, and usually pushes its
23 * results onto the stack, hence the 'pp' terminology. Each OP structure
24 * contains a pointer to the relevant pp_foo() function.
25 *
26 * Control-oriented means things like pp_enteriter() and pp_next(), which
27 * alter the flow of control of the program.
28 */
29
30
a0d0e21e 31#include "EXTERN.h"
864dbfa3 32#define PERL_IN_PP_CTL_C
a0d0e21e
LW
33#include "perl.h"
34
35#ifndef WORD_ALIGN
dea28490 36#define WORD_ALIGN sizeof(U32)
a0d0e21e
LW
37#endif
38
54310121 39#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 40
a0d0e21e
LW
41PP(pp_wantarray)
42{
97aff369 43 dVAR;
39644a26 44 dSP;
a0d0e21e
LW
45 I32 cxix;
46 EXTEND(SP, 1);
47
48 cxix = dopoptosub(cxstack_ix);
49 if (cxix < 0)
50 RETPUSHUNDEF;
51
54310121
PP
52 switch (cxstack[cxix].blk_gimme) {
53 case G_ARRAY:
a0d0e21e 54 RETPUSHYES;
54310121 55 case G_SCALAR:
a0d0e21e 56 RETPUSHNO;
54310121
PP
57 default:
58 RETPUSHUNDEF;
59 }
a0d0e21e
LW
60}
61
2cd61cdb
IZ
62PP(pp_regcreset)
63{
97aff369 64 dVAR;
2cd61cdb
IZ
65 /* XXXX Should store the old value to allow for tie/overload - and
66 restore in regcomp, where marked with XXXX. */
3280af22 67 PL_reginterp_cnt = 0;
0b4182de 68 TAINT_NOT;
2cd61cdb
IZ
69 return NORMAL;
70}
71
b3eb6a9b
GS
72PP(pp_regcomp)
73{
97aff369 74 dVAR;
39644a26 75 dSP;
a0d0e21e 76 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 77 SV *tmpstr;
4608196e 78 MAGIC *mg = NULL;
c737faaf 79 regexp * re;
bfed75c6 80
4b5a0d1c 81 /* prevent recompiling under /o and ithreads. */
3db8f154 82#if defined(USE_ITHREADS)
131b3ad0
DM
83 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
84 if (PL_op->op_flags & OPf_STACKED) {
85 dMARK;
86 SP = MARK;
87 }
88 else
89 (void)POPs;
90 RETURN;
91 }
513629ba 92#endif
131b3ad0
DM
93 if (PL_op->op_flags & OPf_STACKED) {
94 /* multiple args; concatentate them */
95 dMARK; dORIGMARK;
96 tmpstr = PAD_SV(ARGTARG);
97 sv_setpvn(tmpstr, "", 0);
98 while (++MARK <= SP) {
99 if (PL_amagic_generation) {
100 SV *sv;
101 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
102 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
103 {
104 sv_setsv(tmpstr, sv);
105 continue;
106 }
107 }
108 sv_catsv(tmpstr, *MARK);
109 }
110 SvSETMAGIC(tmpstr);
111 SP = ORIGMARK;
112 }
113 else
114 tmpstr = POPs;
513629ba 115
b3eb6a9b 116 if (SvROK(tmpstr)) {
d8f6592e 117 SV * const sv = SvRV(tmpstr);
c277df42 118 if(SvMAGICAL(sv))
14befaf4 119 mg = mg_find(sv, PERL_MAGIC_qr);
c277df42 120 }
b3eb6a9b 121 if (mg) {
28d8d7f4 122 regexp * const re = reg_temp_copy((regexp *)mg->mg_obj);
aaa362c4 123 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 124 PM_SETRE(pm, re);
c277df42
IZ
125 }
126 else {
e62f0680 127 STRLEN len;
3ab4a224 128 const char *t = SvOK(tmpstr) ? SvPV_const(tmpstr, len) : "";
c737faaf 129 re = PM_GETRE(pm);
c277df42 130
20408e3c 131 /* Check against the last compiled regexp. */
d8f6592e
AL
132 if (!re || !re->precomp || re->prelen != (I32)len ||
133 memNE(re->precomp, t, len))
85aff577 134 {
664e119d 135 const regexp_engine *eng = re ? re->engine : NULL;
c737faaf 136 U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME;
d8f6592e
AL
137 if (re) {
138 ReREFCNT_dec(re);
4608196e 139 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
1e2e3d02
YO
140 } else if (PL_curcop->cop_hints_hash) {
141 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
142 "regcomp", 7, 0, 0);
143 if (ptr && SvIOK(ptr) && SvIV(ptr))
144 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 145 }
664e119d 146
533c011a 147 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 148 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 149
84e09d5e 150 if (DO_UTF8(tmpstr))
c737faaf
YO
151 pm_flags |= RXf_UTF8;
152
3ab4a224
AB
153 if (eng)
154 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
155 else
156 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 157
f86aaa29 158 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 159 inside tie/overload accessors. */
c277df42 160 }
4633a7c4 161 }
c737faaf
YO
162
163 re = PM_GETRE(pm);
a0d0e21e 164
72311751 165#ifndef INCOMPLETE_TAINTS
3280af22
NIS
166 if (PL_tainting) {
167 if (PL_tainted)
c737faaf 168 re->extflags |= RXf_TAINTED;
72311751 169 else
c737faaf 170 re->extflags &= ~RXf_TAINTED;
72311751
GS
171 }
172#endif
173
aaa362c4 174 if (!PM_GETRE(pm)->prelen && PL_curpm)
3280af22 175 pm = PL_curpm;
a0d0e21e 176
c737faaf
YO
177
178#if !defined(USE_ITHREADS)
179 /* can't change the optree at runtime either */
180 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 181 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 182 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 183 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 184 }
c737faaf 185#endif
a0d0e21e
LW
186 RETURN;
187}
188
189PP(pp_substcont)
190{
97aff369 191 dVAR;
39644a26 192 dSP;
c09156bb 193 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
194 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
195 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
196 register char *s = cx->sb_s;
197 register char *m = cx->sb_m;
198 char *orig = cx->sb_orig;
901017d6 199 register REGEXP * const rx = cx->sb_rx;
c445ea15 200 SV *nsv = NULL;
988e6e7e
AE
201 REGEXP *old = PM_GETRE(pm);
202 if(old != rx) {
bfed75c6 203 if(old)
988e6e7e 204 ReREFCNT_dec(old);
e22ae1e2 205 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
206 }
207
d9f97599 208 rxres_restore(&cx->sb_rxres, rx);
01b35787 209 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 210
a0d0e21e 211 if (cx->sb_iters++) {
a3b680e6 212 const I32 saviters = cx->sb_iters;
a0d0e21e 213 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 214 DIE(aTHX_ "Substitution loop");
a0d0e21e 215
48c036b1
GS
216 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
217 cx->sb_rxtainted |= 2;
a0d0e21e 218 sv_catsv(dstr, POPs);
8ff629d9 219 FREETMPS; /* Prevent excess tmp stack */
a0d0e21e
LW
220
221 /* Are we done */
f9f4320a 222 if (cx->sb_once || !CALLREGEXEC(rx, s, cx->sb_strend, orig,
9661b544 223 s == m, cx->sb_targ, NULL,
22e551b9 224 ((cx->sb_rflags & REXEC_COPY_STR)
cf93c79d
IZ
225 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
226 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 227 {
823a54a3 228 SV * const targ = cx->sb_targ;
748a9306 229
078c425b
JH
230 assert(cx->sb_strend >= s);
231 if(cx->sb_strend > s) {
232 if (DO_UTF8(dstr) && !SvUTF8(targ))
233 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
234 else
235 sv_catpvn(dstr, s, cx->sb_strend - s);
236 }
48c036b1 237 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 238
f8c7b90f 239#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
240 if (SvIsCOW(targ)) {
241 sv_force_normal_flags(targ, SV_COW_DROP_PV);
242 } else
243#endif
244 {
8bd4d4c5 245 SvPV_free(targ);
ed252734 246 }
f880fe2f 247 SvPV_set(targ, SvPVX(dstr));
748a9306
LW
248 SvCUR_set(targ, SvCUR(dstr));
249 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH
250 if (DO_UTF8(dstr))
251 SvUTF8_on(targ);
6136c704 252 SvPV_set(dstr, NULL);
48c036b1
GS
253
254 TAINT_IF(cx->sb_rxtainted & 1);
22e13caa 255 PUSHs(sv_2mortal(newSViv(saviters - 1)));
48c036b1 256
ffc61ed2 257 (void)SvPOK_only_UTF8(targ);
48c036b1 258 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 259 SvSETMAGIC(targ);
9212bbba 260 SvTAINT(targ);
5cd24f17 261
4633a7c4 262 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
263 POPSUBST(cx);
264 RETURNOP(pm->op_next);
265 }
8e5e9ebe 266 cx->sb_iters = saviters;
a0d0e21e 267 }
cf93c79d 268 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
269 m = s;
270 s = orig;
cf93c79d 271 cx->sb_orig = orig = rx->subbeg;
a0d0e21e
LW
272 s = orig + (m - s);
273 cx->sb_strend = s + (cx->sb_strend - m);
274 }
f0ab9afb 275 cx->sb_m = m = rx->offs[0].start + orig;
db79b45b 276 if (m > s) {
bfed75c6 277 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
278 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
279 else
280 sv_catpvn(dstr, s, m-s);
281 }
f0ab9afb 282 cx->sb_s = rx->offs[0].end + orig;
084916e3 283 { /* Update the pos() information. */
44f8325f 284 SV * const sv = cx->sb_targ;
084916e3
JH
285 MAGIC *mg;
286 I32 i;
7a7f3e45 287 SvUPGRADE(sv, SVt_PVMG);
14befaf4 288 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 289#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 290 if (SvIsCOW(sv))
d83f0a82
NC
291 sv_force_normal_flags(sv, 0);
292#endif
293 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
294 NULL, 0);
084916e3
JH
295 }
296 i = m - orig;
297 if (DO_UTF8(sv))
298 sv_pos_b2u(sv, &i);
299 mg->mg_len = i;
300 }
988e6e7e 301 if (old != rx)
454f1e26 302 (void)ReREFCNT_inc(rx);
d9f97599
GS
303 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
304 rxres_save(&cx->sb_rxres, rx);
29f2e912 305 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
306}
307
c90c0ff4 308void
864dbfa3 309Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
310{
311 UV *p = (UV*)*rsp;
312 U32 i;
96a5add6 313 PERL_UNUSED_CONTEXT;
c90c0ff4 314
d9f97599 315 if (!p || p[1] < rx->nparens) {
f8c7b90f 316#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
317 i = 7 + rx->nparens * 2;
318#else
d9f97599 319 i = 6 + rx->nparens * 2;
ed252734 320#endif
c90c0ff4 321 if (!p)
a02a5408 322 Newx(p, i, UV);
c90c0ff4
PP
323 else
324 Renew(p, i, UV);
325 *rsp = (void*)p;
326 }
327
c445ea15 328 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? rx->subbeg : NULL);
cf93c79d 329 RX_MATCH_COPIED_off(rx);
c90c0ff4 330
f8c7b90f 331#ifdef PERL_OLD_COPY_ON_WRITE
ed252734 332 *p++ = PTR2UV(rx->saved_copy);
c445ea15 333 rx->saved_copy = NULL;
ed252734
NC
334#endif
335
d9f97599 336 *p++ = rx->nparens;
c90c0ff4 337
56431972 338 *p++ = PTR2UV(rx->subbeg);
cf93c79d 339 *p++ = (UV)rx->sublen;
d9f97599 340 for (i = 0; i <= rx->nparens; ++i) {
f0ab9afb
NC
341 *p++ = (UV)rx->offs[i].start;
342 *p++ = (UV)rx->offs[i].end;
c90c0ff4
PP
343 }
344}
345
346void
864dbfa3 347Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
348{
349 UV *p = (UV*)*rsp;
350 U32 i;
96a5add6 351 PERL_UNUSED_CONTEXT;
c90c0ff4 352
ed252734 353 RX_MATCH_COPY_FREE(rx);
cf93c79d 354 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
355 *p++ = 0;
356
f8c7b90f 357#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
358 if (rx->saved_copy)
359 SvREFCNT_dec (rx->saved_copy);
360 rx->saved_copy = INT2PTR(SV*,*p);
361 *p++ = 0;
362#endif
363
d9f97599 364 rx->nparens = *p++;
c90c0ff4 365
56431972 366 rx->subbeg = INT2PTR(char*,*p++);
cf93c79d 367 rx->sublen = (I32)(*p++);
d9f97599 368 for (i = 0; i <= rx->nparens; ++i) {
f0ab9afb
NC
369 rx->offs[i].start = (I32)(*p++);
370 rx->offs[i].end = (I32)(*p++);
c90c0ff4
PP
371 }
372}
373
374void
864dbfa3 375Perl_rxres_free(pTHX_ void **rsp)
c90c0ff4 376{
44f8325f 377 UV * const p = (UV*)*rsp;
96a5add6 378 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
379
380 if (p) {
94010e71
NC
381#ifdef PERL_POISON
382 void *tmp = INT2PTR(char*,*p);
383 Safefree(tmp);
384 if (*p)
7e337ee0 385 PoisonFree(*p, 1, sizeof(*p));
94010e71 386#else
56431972 387 Safefree(INT2PTR(char*,*p));
94010e71 388#endif
f8c7b90f 389#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
390 if (p[1]) {
391 SvREFCNT_dec (INT2PTR(SV*,p[1]));
392 }
393#endif
c90c0ff4 394 Safefree(p);
4608196e 395 *rsp = NULL;
c90c0ff4
PP
396 }
397}
398
a0d0e21e
LW
399PP(pp_formline)
400{
97aff369 401 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 402 register SV * const tmpForm = *++MARK;
dea28490 403 register U32 *fpc;
a0d0e21e 404 register char *t;
245d4a47 405 const char *f;
a0d0e21e 406 register I32 arg;
c445ea15
AL
407 register SV *sv = NULL;
408 const char *item = NULL;
9c5ffd7c
JH
409 I32 itemsize = 0;
410 I32 fieldsize = 0;
a0d0e21e 411 I32 lines = 0;
c445ea15
AL
412 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
413 const char *chophere = NULL;
414 char *linemark = NULL;
65202027 415 NV value;
9c5ffd7c 416 bool gotsome = FALSE;
a0d0e21e 417 STRLEN len;
823a54a3 418 const STRLEN fudge = SvPOK(tmpForm)
24c89738 419 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
420 bool item_is_utf8 = FALSE;
421 bool targ_is_utf8 = FALSE;
c445ea15 422 SV * nsv = NULL;
cbbf8932 423 OP * parseres = NULL;
bfed75c6 424 const char *fmt;
a1b95068 425 bool oneline;
a0d0e21e 426
76e3520e 427 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
428 if (SvREADONLY(tmpForm)) {
429 SvREADONLY_off(tmpForm);
a1b95068 430 parseres = doparseform(tmpForm);
445b3f51
GS
431 SvREADONLY_on(tmpForm);
432 }
433 else
a1b95068
LW
434 parseres = doparseform(tmpForm);
435 if (parseres)
436 return parseres;
a0d0e21e 437 }
3280af22 438 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
439 if (DO_UTF8(PL_formtarget))
440 targ_is_utf8 = TRUE;
a0ed51b3 441 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 442 t += len;
245d4a47 443 f = SvPV_const(tmpForm, len);
a0d0e21e 444 /* need to jump to the next word */
245d4a47 445 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
446
447 for (;;) {
448 DEBUG_f( {
bfed75c6 449 const char *name = "???";
a0d0e21e
LW
450 arg = -1;
451 switch (*fpc) {
452 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
453 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
454 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
455 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
456 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
457
458 case FF_CHECKNL: name = "CHECKNL"; break;
459 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
460 case FF_SPACE: name = "SPACE"; break;
461 case FF_HALFSPACE: name = "HALFSPACE"; break;
462 case FF_ITEM: name = "ITEM"; break;
463 case FF_CHOP: name = "CHOP"; break;
464 case FF_LINEGLOB: name = "LINEGLOB"; break;
465 case FF_NEWLINE: name = "NEWLINE"; break;
466 case FF_MORE: name = "MORE"; break;
467 case FF_LINEMARK: name = "LINEMARK"; break;
468 case FF_END: name = "END"; break;
bfed75c6 469 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 470 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
471 }
472 if (arg >= 0)
bf49b057 473 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 474 else
bf49b057 475 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 476 } );
a0d0e21e
LW
477 switch (*fpc++) {
478 case FF_LINEMARK:
479 linemark = t;
a0d0e21e
LW
480 lines++;
481 gotsome = FALSE;
482 break;
483
484 case FF_LITERAL:
485 arg = *fpc++;
1bd51a4c 486 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 487 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
488 *t = '\0';
489 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
490 t = SvEND(PL_formtarget);
1bd51a4c
IH
491 break;
492 }
493 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 494 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
495 *t = '\0';
496 sv_utf8_upgrade(PL_formtarget);
497 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
498 t = SvEND(PL_formtarget);
499 targ_is_utf8 = TRUE;
500 }
a0d0e21e
LW
501 while (arg--)
502 *t++ = *f++;
503 break;
504
505 case FF_SKIP:
506 f += *fpc++;
507 break;
508
509 case FF_FETCH:
510 arg = *fpc++;
511 f += arg;
512 fieldsize = arg;
513
514 if (MARK < SP)
515 sv = *++MARK;
516 else {
3280af22 517 sv = &PL_sv_no;
599cee73 518 if (ckWARN(WARN_SYNTAX))
9014280d 519 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
520 }
521 break;
522
523 case FF_CHECKNL:
5a34cab7
NC
524 {
525 const char *send;
526 const char *s = item = SvPV_const(sv, len);
527 itemsize = len;
528 if (DO_UTF8(sv)) {
529 itemsize = sv_len_utf8(sv);
530 if (itemsize != (I32)len) {
531 I32 itembytes;
532 if (itemsize > fieldsize) {
533 itemsize = fieldsize;
534 itembytes = itemsize;
535 sv_pos_u2b(sv, &itembytes, 0);
536 }
537 else
538 itembytes = len;
539 send = chophere = s + itembytes;
540 while (s < send) {
541 if (*s & ~31)
542 gotsome = TRUE;
543 else if (*s == '\n')
544 break;
545 s++;
546 }
547 item_is_utf8 = TRUE;
548 itemsize = s - item;
549 sv_pos_b2u(sv, &itemsize);
550 break;
a0ed51b3 551 }
a0ed51b3 552 }
5a34cab7
NC
553 item_is_utf8 = FALSE;
554 if (itemsize > fieldsize)
555 itemsize = fieldsize;
556 send = chophere = s + itemsize;
557 while (s < send) {
558 if (*s & ~31)
559 gotsome = TRUE;
560 else if (*s == '\n')
561 break;
562 s++;
563 }
564 itemsize = s - item;
565 break;
a0ed51b3 566 }
a0d0e21e
LW
567
568 case FF_CHECKCHOP:
5a34cab7
NC
569 {
570 const char *s = item = SvPV_const(sv, len);
571 itemsize = len;
572 if (DO_UTF8(sv)) {
573 itemsize = sv_len_utf8(sv);
574 if (itemsize != (I32)len) {
575 I32 itembytes;
576 if (itemsize <= fieldsize) {
577 const char *send = chophere = s + itemsize;
578 while (s < send) {
579 if (*s == '\r') {
580 itemsize = s - item;
a0ed51b3 581 chophere = s;
a0ed51b3 582 break;
5a34cab7
NC
583 }
584 if (*s++ & ~31)
a0ed51b3 585 gotsome = TRUE;
a0ed51b3 586 }
a0ed51b3 587 }
5a34cab7
NC
588 else {
589 const char *send;
590 itemsize = fieldsize;
591 itembytes = itemsize;
592 sv_pos_u2b(sv, &itembytes, 0);
593 send = chophere = s + itembytes;
594 while (s < send || (s == send && isSPACE(*s))) {
595 if (isSPACE(*s)) {
596 if (chopspace)
597 chophere = s;
598 if (*s == '\r')
599 break;
600 }
601 else {
602 if (*s & ~31)
603 gotsome = TRUE;
604 if (strchr(PL_chopset, *s))
605 chophere = s + 1;
606 }
607 s++;
608 }
609 itemsize = chophere - item;
610 sv_pos_b2u(sv, &itemsize);
611 }
612 item_is_utf8 = TRUE;
a0d0e21e
LW
613 break;
614 }
a0d0e21e 615 }
5a34cab7
NC
616 item_is_utf8 = FALSE;
617 if (itemsize <= fieldsize) {
618 const char *const send = chophere = s + itemsize;
619 while (s < send) {
620 if (*s == '\r') {
621 itemsize = s - item;
a0d0e21e 622 chophere = s;
a0d0e21e 623 break;
5a34cab7
NC
624 }
625 if (*s++ & ~31)
a0d0e21e 626 gotsome = TRUE;
a0d0e21e 627 }
a0d0e21e 628 }
5a34cab7
NC
629 else {
630 const char *send;
631 itemsize = fieldsize;
632 send = chophere = s + itemsize;
633 while (s < send || (s == send && isSPACE(*s))) {
634 if (isSPACE(*s)) {
635 if (chopspace)
636 chophere = s;
637 if (*s == '\r')
638 break;
639 }
640 else {
641 if (*s & ~31)
642 gotsome = TRUE;
643 if (strchr(PL_chopset, *s))
644 chophere = s + 1;
645 }
646 s++;
647 }
648 itemsize = chophere - item;
649 }
650 break;
a0d0e21e 651 }
a0d0e21e
LW
652
653 case FF_SPACE:
654 arg = fieldsize - itemsize;
655 if (arg) {
656 fieldsize -= arg;
657 while (arg-- > 0)
658 *t++ = ' ';
659 }
660 break;
661
662 case FF_HALFSPACE:
663 arg = fieldsize - itemsize;
664 if (arg) {
665 arg /= 2;
666 fieldsize -= arg;
667 while (arg-- > 0)
668 *t++ = ' ';
669 }
670 break;
671
672 case FF_ITEM:
5a34cab7
NC
673 {
674 const char *s = item;
675 arg = itemsize;
676 if (item_is_utf8) {
677 if (!targ_is_utf8) {
678 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
679 *t = '\0';
680 sv_utf8_upgrade(PL_formtarget);
681 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
682 t = SvEND(PL_formtarget);
683 targ_is_utf8 = TRUE;
a0ed51b3 684 }
5a34cab7
NC
685 while (arg--) {
686 if (UTF8_IS_CONTINUED(*s)) {
687 STRLEN skip = UTF8SKIP(s);
688 switch (skip) {
689 default:
690 Move(s,t,skip,char);
691 s += skip;
692 t += skip;
693 break;
694 case 7: *t++ = *s++;
695 case 6: *t++ = *s++;
696 case 5: *t++ = *s++;
697 case 4: *t++ = *s++;
698 case 3: *t++ = *s++;
699 case 2: *t++ = *s++;
700 case 1: *t++ = *s++;
701 }
702 }
703 else {
704 if ( !((*t++ = *s++) & ~31) )
705 t[-1] = ' ';
706 }
a0ed51b3 707 }
5a34cab7 708 break;
a0ed51b3 709 }
5a34cab7
NC
710 if (targ_is_utf8 && !item_is_utf8) {
711 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
712 *t = '\0';
713 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
714 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 715#ifdef EBCDIC
901017d6 716 const int ch = *t;
5a34cab7 717 if (iscntrl(ch))
78da4d13 718#else
5a34cab7 719 if (!(*t & ~31))
78da4d13 720#endif
5a34cab7
NC
721 *t = ' ';
722 }
723 break;
78da4d13 724 }
5a34cab7 725 while (arg--) {
9d116dd7 726#ifdef EBCDIC
901017d6 727 const int ch = *t++ = *s++;
5a34cab7 728 if (iscntrl(ch))
a0d0e21e 729#else
5a34cab7 730 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 731#endif
5a34cab7
NC
732 t[-1] = ' ';
733 }
734 break;
a0d0e21e 735 }
a0d0e21e
LW
736
737 case FF_CHOP:
5a34cab7
NC
738 {
739 const char *s = chophere;
740 if (chopspace) {
af68e756 741 while (isSPACE(*s))
5a34cab7
NC
742 s++;
743 }
744 sv_chop(sv,s);
745 SvSETMAGIC(sv);
746 break;
a0d0e21e 747 }
a0d0e21e 748
a1b95068
LW
749 case FF_LINESNGL:
750 chopspace = 0;
751 oneline = TRUE;
752 goto ff_line;
a0d0e21e 753 case FF_LINEGLOB:
a1b95068
LW
754 oneline = FALSE;
755 ff_line:
5a34cab7
NC
756 {
757 const char *s = item = SvPV_const(sv, len);
758 itemsize = len;
759 if ((item_is_utf8 = DO_UTF8(sv)))
760 itemsize = sv_len_utf8(sv);
761 if (itemsize) {
762 bool chopped = FALSE;
763 const char *const send = s + len;
764 gotsome = TRUE;
765 chophere = s + itemsize;
766 while (s < send) {
767 if (*s++ == '\n') {
768 if (oneline) {
769 chopped = TRUE;
770 chophere = s;
771 break;
772 } else {
773 if (s == send) {
774 itemsize--;
775 chopped = TRUE;
776 } else
777 lines++;
778 }
1bd51a4c 779 }
a0d0e21e 780 }
5a34cab7
NC
781 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
782 if (targ_is_utf8)
783 SvUTF8_on(PL_formtarget);
784 if (oneline) {
785 SvCUR_set(sv, chophere - item);
786 sv_catsv(PL_formtarget, sv);
787 SvCUR_set(sv, itemsize);
788 } else
789 sv_catsv(PL_formtarget, sv);
790 if (chopped)
791 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) - 1);
792 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
793 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
794 if (item_is_utf8)
795 targ_is_utf8 = TRUE;
a0d0e21e 796 }
5a34cab7 797 break;
a0d0e21e 798 }
a0d0e21e 799
a1b95068
LW
800 case FF_0DECIMAL:
801 arg = *fpc++;
802#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
803 fmt = (const char *)
804 ((arg & 256) ?
805 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 806#else
10edeb5d
JH
807 fmt = (const char *)
808 ((arg & 256) ?
809 "%#0*.*f" : "%0*.*f");
a1b95068
LW
810#endif
811 goto ff_dec;
a0d0e21e 812 case FF_DECIMAL:
a0d0e21e 813 arg = *fpc++;
65202027 814#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
815 fmt = (const char *)
816 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 817#else
10edeb5d
JH
818 fmt = (const char *)
819 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 820#endif
a1b95068 821 ff_dec:
784707d5
JP
822 /* If the field is marked with ^ and the value is undefined,
823 blank it out. */
784707d5
JP
824 if ((arg & 512) && !SvOK(sv)) {
825 arg = fieldsize;
826 while (arg--)
827 *t++ = ' ';
828 break;
829 }
830 gotsome = TRUE;
831 value = SvNV(sv);
a1b95068 832 /* overflow evidence */
bfed75c6 833 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
834 arg = fieldsize;
835 while (arg--)
836 *t++ = '#';
837 break;
838 }
784707d5
JP
839 /* Formats aren't yet marked for locales, so assume "yes". */
840 {
841 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 842 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
843 RESTORE_NUMERIC_STANDARD();
844 }
845 t += fieldsize;
846 break;
a1b95068 847
a0d0e21e
LW
848 case FF_NEWLINE:
849 f++;
850 while (t-- > linemark && *t == ' ') ;
851 t++;
852 *t++ = '\n';
853 break;
854
855 case FF_BLANK:
856 arg = *fpc++;
857 if (gotsome) {
858 if (arg) { /* repeat until fields exhausted? */
859 *t = '\0';
b15aece3 860 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 861 lines += FmLINES(PL_formtarget);
a0d0e21e
LW
862 if (lines == 200) {
863 arg = t - linemark;
864 if (strnEQ(linemark, linemark - arg, arg))
cea2e8a9 865 DIE(aTHX_ "Runaway format");
a0d0e21e 866 }
1bd51a4c
IH
867 if (targ_is_utf8)
868 SvUTF8_on(PL_formtarget);
3280af22 869 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
870 SP = ORIGMARK;
871 RETURNOP(cLISTOP->op_first);
872 }
873 }
874 else {
875 t = linemark;
876 lines--;
877 }
878 break;
879
880 case FF_MORE:
5a34cab7
NC
881 {
882 const char *s = chophere;
883 const char *send = item + len;
884 if (chopspace) {
af68e756 885 while (isSPACE(*s) && (s < send))
5a34cab7 886 s++;
a0d0e21e 887 }
5a34cab7
NC
888 if (s < send) {
889 char *s1;
890 arg = fieldsize - itemsize;
891 if (arg) {
892 fieldsize -= arg;
893 while (arg-- > 0)
894 *t++ = ' ';
895 }
896 s1 = t - 3;
897 if (strnEQ(s1," ",3)) {
898 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
899 s1--;
900 }
901 *s1++ = '.';
902 *s1++ = '.';
903 *s1++ = '.';
a0d0e21e 904 }
5a34cab7 905 break;
a0d0e21e 906 }
a0d0e21e
LW
907 case FF_END:
908 *t = '\0';
b15aece3 909 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
910 if (targ_is_utf8)
911 SvUTF8_on(PL_formtarget);
3280af22 912 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
913 SP = ORIGMARK;
914 RETPUSHYES;
915 }
916 }
917}
918
919PP(pp_grepstart)
920{
27da23d5 921 dVAR; dSP;
a0d0e21e
LW
922 SV *src;
923
3280af22 924 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 925 (void)POPMARK;
54310121 926 if (GIMME_V == G_SCALAR)
0b024f31 927 XPUSHs(sv_2mortal(newSViv(0)));
533c011a 928 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 929 }
3280af22 930 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
931 pp_pushmark(); /* push dst */
932 pp_pushmark(); /* push src */
a0d0e21e
LW
933 ENTER; /* enter outer scope */
934
935 SAVETMPS;
59f00321
RGS
936 if (PL_op->op_private & OPpGREP_LEX)
937 SAVESPTR(PAD_SVl(PL_op->op_targ));
938 else
939 SAVE_DEFSV;
a0d0e21e 940 ENTER; /* enter inner scope */
7766f137 941 SAVEVPTR(PL_curpm);
a0d0e21e 942
3280af22 943 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 944 SvTEMP_off(src);
59f00321
RGS
945 if (PL_op->op_private & OPpGREP_LEX)
946 PAD_SVl(PL_op->op_targ) = src;
947 else
948 DEFSV = src;
a0d0e21e
LW
949
950 PUTBACK;
533c011a 951 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 952 pp_pushmark(); /* push top */
533c011a 953 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
954}
955
a0d0e21e
LW
956PP(pp_mapwhile)
957{
27da23d5 958 dVAR; dSP;
f54cb97a 959 const I32 gimme = GIMME_V;
544f3153 960 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
961 I32 count;
962 I32 shift;
963 SV** src;
ac27b0f5 964 SV** dst;
a0d0e21e 965
544f3153 966 /* first, move source pointer to the next item in the source list */
3280af22 967 ++PL_markstack_ptr[-1];
544f3153
GS
968
969 /* if there are new items, push them into the destination list */
4c90a460 970 if (items && gimme != G_VOID) {
544f3153
GS
971 /* might need to make room back there first */
972 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
973 /* XXX this implementation is very pessimal because the stack
974 * is repeatedly extended for every set of items. Is possible
975 * to do this without any stack extension or copying at all
976 * by maintaining a separate list over which the map iterates
18ef8bea 977 * (like foreach does). --gsar */
544f3153
GS
978
979 /* everything in the stack after the destination list moves
980 * towards the end the stack by the amount of room needed */
981 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
982
983 /* items to shift up (accounting for the moved source pointer) */
984 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
985
986 /* This optimization is by Ben Tilly and it does
987 * things differently from what Sarathy (gsar)
988 * is describing. The downside of this optimization is
989 * that leaves "holes" (uninitialized and hopefully unused areas)
990 * to the Perl stack, but on the other hand this
991 * shouldn't be a problem. If Sarathy's idea gets
992 * implemented, this optimization should become
993 * irrelevant. --jhi */
994 if (shift < count)
995 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 996
924508f0
GS
997 EXTEND(SP,shift);
998 src = SP;
999 dst = (SP += shift);
3280af22
NIS
1000 PL_markstack_ptr[-1] += shift;
1001 *PL_markstack_ptr += shift;
544f3153 1002 while (count--)
a0d0e21e
LW
1003 *dst-- = *src--;
1004 }
544f3153 1005 /* copy the new items down to the destination list */
ac27b0f5 1006 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
1007 if (gimme == G_ARRAY) {
1008 while (items-- > 0)
1009 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1010 }
bfed75c6 1011 else {
22023b26
TP
1012 /* scalar context: we don't care about which values map returns
1013 * (we use undef here). And so we certainly don't want to do mortal
1014 * copies of meaningless values. */
1015 while (items-- > 0) {
b988aa42 1016 (void)POPs;
22023b26
TP
1017 *dst-- = &PL_sv_undef;
1018 }
1019 }
a0d0e21e
LW
1020 }
1021 LEAVE; /* exit inner scope */
1022
1023 /* All done yet? */
3280af22 1024 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1025
1026 (void)POPMARK; /* pop top */
1027 LEAVE; /* exit outer scope */
1028 (void)POPMARK; /* pop src */
3280af22 1029 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1030 (void)POPMARK; /* pop dst */
3280af22 1031 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1032 if (gimme == G_SCALAR) {
7cc47870
RGS
1033 if (PL_op->op_private & OPpGREP_LEX) {
1034 SV* sv = sv_newmortal();
1035 sv_setiv(sv, items);
1036 PUSHs(sv);
1037 }
1038 else {
1039 dTARGET;
1040 XPUSHi(items);
1041 }
a0d0e21e 1042 }
54310121
PP
1043 else if (gimme == G_ARRAY)
1044 SP += items;
a0d0e21e
LW
1045 RETURN;
1046 }
1047 else {
1048 SV *src;
1049
1050 ENTER; /* enter inner scope */
7766f137 1051 SAVEVPTR(PL_curpm);
a0d0e21e 1052
544f3153 1053 /* set $_ to the new source item */
3280af22 1054 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1055 SvTEMP_off(src);
59f00321
RGS
1056 if (PL_op->op_private & OPpGREP_LEX)
1057 PAD_SVl(PL_op->op_targ) = src;
1058 else
1059 DEFSV = src;
a0d0e21e
LW
1060
1061 RETURNOP(cLOGOP->op_other);
1062 }
1063}
1064
a0d0e21e
LW
1065/* Range stuff. */
1066
1067PP(pp_range)
1068{
97aff369 1069 dVAR;
a0d0e21e 1070 if (GIMME == G_ARRAY)
1a67a97c 1071 return NORMAL;
538573f7 1072 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1073 return cLOGOP->op_other;
538573f7 1074 else
1a67a97c 1075 return NORMAL;
a0d0e21e
LW
1076}
1077
1078PP(pp_flip)
1079{
97aff369 1080 dVAR;
39644a26 1081 dSP;
a0d0e21e
LW
1082
1083 if (GIMME == G_ARRAY) {
1a67a97c 1084 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1085 }
1086 else {
1087 dTOPss;
44f8325f 1088 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1089 int flip = 0;
790090df 1090
bfed75c6 1091 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1092 if (GvIO(PL_last_in_gv)) {
1093 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1094 }
1095 else {
fafc274c 1096 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1097 if (gv && GvSV(gv))
1098 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1099 }
bfed75c6
AL
1100 } else {
1101 flip = SvTRUE(sv);
1102 }
1103 if (flip) {
a0d0e21e 1104 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1105 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1106 sv_setiv(targ, 1);
3e3baf6d 1107 SETs(targ);
a0d0e21e
LW
1108 RETURN;
1109 }
1110 else {
1111 sv_setiv(targ, 0);
924508f0 1112 SP--;
1a67a97c 1113 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1114 }
1115 }
c69006e4 1116 sv_setpvn(TARG, "", 0);
a0d0e21e
LW
1117 SETs(targ);
1118 RETURN;
1119 }
1120}
1121
8e9bbdb9
RGS
1122/* This code tries to decide if "$left .. $right" should use the
1123 magical string increment, or if the range is numeric (we make
1124 an exception for .."0" [#18165]). AMS 20021031. */
1125
1126#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1127 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1128 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1129 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1130 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1131 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1132
a0d0e21e
LW
1133PP(pp_flop)
1134{
97aff369 1135 dVAR; dSP;
a0d0e21e
LW
1136
1137 if (GIMME == G_ARRAY) {
1138 dPOPPOPssrl;
86cb7173 1139
5b295bef
RD
1140 SvGETMAGIC(left);
1141 SvGETMAGIC(right);
a0d0e21e 1142
8e9bbdb9 1143 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1144 register IV i, j;
1145 IV max;
4fe3f0fa
MHM
1146 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1147 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1148 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1149 i = SvIV(left);
1150 max = SvIV(right);
bbce6d69 1151 if (max >= i) {
c1ab3db2
AK
1152 j = max - i + 1;
1153 EXTEND_MORTAL(j);
1154 EXTEND(SP, j);
bbce6d69 1155 }
c1ab3db2
AK
1156 else
1157 j = 0;
1158 while (j--) {
901017d6 1159 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1160 PUSHs(sv);
1161 }
1162 }
1163 else {
44f8325f 1164 SV * const final = sv_mortalcopy(right);
13c5b33c 1165 STRLEN len;
823a54a3 1166 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1167
901017d6 1168 SV *sv = sv_mortalcopy(left);
13c5b33c 1169 SvPV_force_nolen(sv);
89ea2908 1170 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1171 XPUSHs(sv);
b15aece3 1172 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1173 break;
a0d0e21e
LW
1174 sv = sv_2mortal(newSVsv(sv));
1175 sv_inc(sv);
1176 }
a0d0e21e
LW
1177 }
1178 }
1179 else {
1180 dTOPss;
901017d6 1181 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1182 int flop = 0;
a0d0e21e 1183 sv_inc(targ);
4e3399f9
YST
1184
1185 if (PL_op->op_private & OPpFLIP_LINENUM) {
1186 if (GvIO(PL_last_in_gv)) {
1187 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1188 }
1189 else {
fafc274c 1190 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1191 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1192 }
1193 }
1194 else {
1195 flop = SvTRUE(sv);
1196 }
1197
1198 if (flop) {
a0d0e21e 1199 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1200 sv_catpvs(targ, "E0");
a0d0e21e
LW
1201 }
1202 SETs(targ);
1203 }
1204
1205 RETURN;
1206}
1207
1208/* Control. */
1209
27da23d5 1210static const char * const context_name[] = {
515afda2
NC
1211 "pseudo-block",
1212 "subroutine",
1213 "eval",
1214 "loop",
1215 "substitution",
1216 "block",
0d863452
RH
1217 "format",
1218 "given",
1219 "when"
515afda2
NC
1220};
1221
76e3520e 1222STATIC I32
06b5626a 1223S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1224{
97aff369 1225 dVAR;
a0d0e21e 1226 register I32 i;
a0d0e21e
LW
1227
1228 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1229 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1230 switch (CxTYPE(cx)) {
a0d0e21e 1231 case CXt_SUBST:
a0d0e21e 1232 case CXt_SUB:
7766f137 1233 case CXt_FORMAT:
a0d0e21e 1234 case CXt_EVAL:
0a753a76 1235 case CXt_NULL:
0d863452
RH
1236 case CXt_GIVEN:
1237 case CXt_WHEN:
e476b1b5 1238 if (ckWARN(WARN_EXITING))
515afda2
NC
1239 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1240 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1241 if (CxTYPE(cx) == CXt_NULL)
1242 return -1;
1243 break;
a0d0e21e 1244 case CXt_LOOP:
901017d6 1245 if ( !cx->blk_loop.label || strNE(label, cx->blk_loop.label) ) {
cea2e8a9 1246 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
68dc0745 1247 (long)i, cx->blk_loop.label));
a0d0e21e
LW
1248 continue;
1249 }
cea2e8a9 1250 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1251 return i;
1252 }
1253 }
1254 return i;
1255}
1256
0d863452
RH
1257
1258
e50aee73 1259I32
864dbfa3 1260Perl_dowantarray(pTHX)
e50aee73 1261{
97aff369 1262 dVAR;
f54cb97a 1263 const I32 gimme = block_gimme();
54310121
PP
1264 return (gimme == G_VOID) ? G_SCALAR : gimme;
1265}
1266
1267I32
864dbfa3 1268Perl_block_gimme(pTHX)
54310121 1269{
97aff369 1270 dVAR;
06b5626a 1271 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1272 if (cxix < 0)
46fc3d4c 1273 return G_VOID;
e50aee73 1274
54310121 1275 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1276 case G_VOID:
1277 return G_VOID;
54310121 1278 case G_SCALAR:
e50aee73 1279 return G_SCALAR;
54310121
PP
1280 case G_ARRAY:
1281 return G_ARRAY;
1282 default:
cea2e8a9 1283 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1284 /* NOTREACHED */
1285 return 0;
54310121 1286 }
e50aee73
AD
1287}
1288
78f9721b
SM
1289I32
1290Perl_is_lvalue_sub(pTHX)
1291{
97aff369 1292 dVAR;
06b5626a 1293 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1294 assert(cxix >= 0); /* We should only be called from inside subs */
1295
cc8d50a7
NC
1296 if (cxstack[cxix].blk_sub.lval && CvLVALUE(cxstack[cxix].blk_sub.cv))
1297 return cxstack[cxix].blk_sub.lval;
78f9721b
SM
1298 else
1299 return 0;
1300}
1301
76e3520e 1302STATIC I32
cea2e8a9 1303S_dopoptosub(pTHX_ I32 startingblock)
a0d0e21e 1304{
97aff369 1305 dVAR;
2c375eb9
GS
1306 return dopoptosub_at(cxstack, startingblock);
1307}
1308
1309STATIC I32
901017d6 1310S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1311{
97aff369 1312 dVAR;
a0d0e21e 1313 I32 i;
a0d0e21e 1314 for (i = startingblock; i >= 0; i--) {
901017d6 1315 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1316 switch (CxTYPE(cx)) {
a0d0e21e
LW
1317 default:
1318 continue;
1319 case CXt_EVAL:
1320 case CXt_SUB:
7766f137 1321 case CXt_FORMAT:
cea2e8a9 1322 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1323 return i;
1324 }
1325 }
1326 return i;
1327}
1328
76e3520e 1329STATIC I32
cea2e8a9 1330S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1331{
97aff369 1332 dVAR;
a0d0e21e 1333 I32 i;
a0d0e21e 1334 for (i = startingblock; i >= 0; i--) {
06b5626a 1335 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1336 switch (CxTYPE(cx)) {
a0d0e21e
LW
1337 default:
1338 continue;
1339 case CXt_EVAL:
cea2e8a9 1340 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1341 return i;
1342 }
1343 }
1344 return i;
1345}
1346
76e3520e 1347STATIC I32
cea2e8a9 1348S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1349{
97aff369 1350 dVAR;
a0d0e21e 1351 I32 i;
a0d0e21e 1352 for (i = startingblock; i >= 0; i--) {
901017d6 1353 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1354 switch (CxTYPE(cx)) {
a0d0e21e 1355 case CXt_SUBST:
a0d0e21e 1356 case CXt_SUB:
7766f137 1357 case CXt_FORMAT:
a0d0e21e 1358 case CXt_EVAL:
0a753a76 1359 case CXt_NULL:
e476b1b5 1360 if (ckWARN(WARN_EXITING))
515afda2
NC
1361 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1362 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1363 if ((CxTYPE(cx)) == CXt_NULL)
1364 return -1;
1365 break;
a0d0e21e 1366 case CXt_LOOP:
cea2e8a9 1367 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1368 return i;
1369 }
1370 }
1371 return i;
1372}
1373
0d863452
RH
1374STATIC I32
1375S_dopoptogiven(pTHX_ I32 startingblock)
1376{
97aff369 1377 dVAR;
0d863452
RH
1378 I32 i;
1379 for (i = startingblock; i >= 0; i--) {
1380 register const PERL_CONTEXT *cx = &cxstack[i];
1381 switch (CxTYPE(cx)) {
1382 default:
1383 continue;
1384 case CXt_GIVEN:
1385 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1386 return i;
1387 case CXt_LOOP:
1388 if (CxFOREACHDEF(cx)) {
1389 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1390 return i;
1391 }
1392 }
1393 }
1394 return i;
1395}
1396
1397STATIC I32
1398S_dopoptowhen(pTHX_ I32 startingblock)
1399{
97aff369 1400 dVAR;
0d863452
RH
1401 I32 i;
1402 for (i = startingblock; i >= 0; i--) {
1403 register const PERL_CONTEXT *cx = &cxstack[i];
1404 switch (CxTYPE(cx)) {
1405 default:
1406 continue;
1407 case CXt_WHEN:
1408 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1409 return i;
1410 }
1411 }
1412 return i;
1413}
1414
a0d0e21e 1415void
864dbfa3 1416Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1417{
97aff369 1418 dVAR;
a0d0e21e
LW
1419 I32 optype;
1420
1421 while (cxstack_ix > cxix) {
b0d9ce38 1422 SV *sv;
06b5626a 1423 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1424 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1425 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1426 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1427 switch (CxTYPE(cx)) {
c90c0ff4
PP
1428 case CXt_SUBST:
1429 POPSUBST(cx);
1430 continue; /* not break */
a0d0e21e 1431 case CXt_SUB:
b0d9ce38
GS
1432 POPSUB(cx,sv);
1433 LEAVESUB(sv);
a0d0e21e
LW
1434 break;
1435 case CXt_EVAL:
1436 POPEVAL(cx);
1437 break;
1438 case CXt_LOOP:
1439 POPLOOP(cx);
1440 break;
0a753a76 1441 case CXt_NULL:
a0d0e21e 1442 break;
7766f137
GS
1443 case CXt_FORMAT:
1444 POPFORMAT(cx);
1445 break;
a0d0e21e 1446 }
c90c0ff4 1447 cxstack_ix--;
a0d0e21e 1448 }
1b6737cc 1449 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1450}
1451
5a844595
GS
1452void
1453Perl_qerror(pTHX_ SV *err)
1454{
97aff369 1455 dVAR;
5a844595
GS
1456 if (PL_in_eval)
1457 sv_catsv(ERRSV, err);
1458 else if (PL_errors)
1459 sv_catsv(PL_errors, err);
1460 else
be2597df 1461 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1462 if (PL_parser)
1463 ++PL_parser->error_count;
5a844595
GS
1464}
1465
a0d0e21e 1466OP *
35a4481c 1467Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1468{
27da23d5 1469 dVAR;
87582a92 1470
3280af22 1471 if (PL_in_eval) {
a0d0e21e 1472 I32 cxix;
a0d0e21e 1473 I32 gimme;
a0d0e21e 1474
4e6ea2c3 1475 if (message) {
faef0170 1476 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1477 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1478 SV * const err = ERRSV;
c445ea15 1479 const char *e = NULL;
98eae8f5 1480 if (!SvPOK(err))
c69006e4 1481 sv_setpvn(err,"",0);
98eae8f5 1482 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1483 STRLEN len;
349d4f2f 1484 e = SvPV_const(err, len);
0510663f 1485 e += len - msglen;
98eae8f5 1486 if (*e != *message || strNE(e,message))
c445ea15 1487 e = NULL;
98eae8f5
GS
1488 }
1489 if (!e) {
1490 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1491 sv_catpvn(err, prefix, sizeof(prefix)-1);
1492 sv_catpvn(err, message, msglen);
e476b1b5 1493 if (ckWARN(WARN_MISC)) {
504618e9 1494 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1495 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1496 }
4633a7c4 1497 }
4633a7c4 1498 }
1aa99e6b 1499 else {
06bf62c7 1500 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1501 }
4633a7c4 1502 }
4e6ea2c3 1503
5a844595
GS
1504 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1505 && PL_curstackinfo->si_prev)
1506 {
bac4b2ad 1507 dounwind(-1);
d3acc0f7 1508 POPSTACK;
bac4b2ad 1509 }
e336de0d 1510
a0d0e21e
LW
1511 if (cxix >= 0) {
1512 I32 optype;
35a4481c 1513 register PERL_CONTEXT *cx;
901017d6 1514 SV **newsp;
a0d0e21e
LW
1515
1516 if (cxix < cxstack_ix)
1517 dounwind(cxix);
1518
3280af22 1519 POPBLOCK(cx,PL_curpm);
6b35e009 1520 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1521 if (!message)
349d4f2f 1522 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1523 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1524 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1525 my_exit(1);
1526 }
1527 POPEVAL(cx);
1528
1529 if (gimme == G_SCALAR)
3280af22
NIS
1530 *++newsp = &PL_sv_undef;
1531 PL_stack_sp = newsp;
a0d0e21e
LW
1532
1533 LEAVE;
748a9306 1534
7fb6a879
GS
1535 /* LEAVE could clobber PL_curcop (see save_re_context())
1536 * XXX it might be better to find a way to avoid messing with
1537 * PL_curcop in save_re_context() instead, but this is a more
1538 * minimal fix --GSAR */
1539 PL_curcop = cx->blk_oldcop;
1540
7a2e2cd6 1541 if (optype == OP_REQUIRE) {
44f8325f 1542 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1543 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1544 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1545 &PL_sv_undef, 0);
5a844595
GS
1546 DIE(aTHX_ "%sCompilation failed in require",
1547 *msg ? msg : "Unknown error\n");
7a2e2cd6 1548 }
f39bc417
DM
1549 assert(CxTYPE(cx) == CXt_EVAL);
1550 return cx->blk_eval.retop;
a0d0e21e
LW
1551 }
1552 }
9cc2fdd3 1553 if (!message)
349d4f2f 1554 message = SvPVx_const(ERRSV, msglen);
87582a92 1555
7ff03255 1556 write_to_stderr(message, msglen);
f86702cc
PP
1557 my_failure_exit();
1558 /* NOTREACHED */
a0d0e21e
LW
1559 return 0;
1560}
1561
1562PP(pp_xor)
1563{
97aff369 1564 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1565 if (SvTRUE(left) != SvTRUE(right))
1566 RETSETYES;
1567 else
1568 RETSETNO;
1569}
1570
a0d0e21e
LW
1571PP(pp_caller)
1572{
97aff369 1573 dVAR;
39644a26 1574 dSP;
a0d0e21e 1575 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1576 register const PERL_CONTEXT *cx;
1577 register const PERL_CONTEXT *ccstack = cxstack;
1578 const PERL_SI *top_si = PL_curstackinfo;
54310121 1579 I32 gimme;
06b5626a 1580 const char *stashname;
a0d0e21e
LW
1581 I32 count = 0;
1582
1583 if (MAXARG)
1584 count = POPi;
27d41816 1585
a0d0e21e 1586 for (;;) {
2c375eb9
GS
1587 /* we may be in a higher stacklevel, so dig down deeper */
1588 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1589 top_si = top_si->si_prev;
1590 ccstack = top_si->si_cxstack;
1591 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1592 }
a0d0e21e 1593 if (cxix < 0) {
27d41816
DM
1594 if (GIMME != G_ARRAY) {
1595 EXTEND(SP, 1);
a0d0e21e 1596 RETPUSHUNDEF;
27d41816 1597 }
a0d0e21e
LW
1598 RETURN;
1599 }
f2a7f298 1600 /* caller() should not report the automatic calls to &DB::sub */
1601 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1602 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1603 count++;
1604 if (!count--)
1605 break;
2c375eb9 1606 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1607 }
2c375eb9
GS
1608
1609 cx = &ccstack[cxix];
7766f137 1610 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1611 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1612 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1613 field below is defined for any cx. */
f2a7f298 1614 /* caller() should not report the automatic calls to &DB::sub */
1615 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1616 cx = &ccstack[dbcxix];
06a5b730
PP
1617 }
1618
ed094faf 1619 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1620 if (GIMME != G_ARRAY) {
27d41816 1621 EXTEND(SP, 1);
ed094faf 1622 if (!stashname)
3280af22 1623 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1624 else {
1625 dTARGET;
ed094faf 1626 sv_setpv(TARG, stashname);
49d8d3a1
MB
1627 PUSHs(TARG);
1628 }
a0d0e21e
LW
1629 RETURN;
1630 }
a0d0e21e 1631
b3ca2e83 1632 EXTEND(SP, 11);
27d41816 1633
ed094faf 1634 if (!stashname)
3280af22 1635 PUSHs(&PL_sv_undef);
49d8d3a1 1636 else
ed094faf 1637 PUSHs(sv_2mortal(newSVpv(stashname, 0)));
248c2a4d 1638 PUSHs(sv_2mortal(newSVpv(OutCopFILE(cx->blk_oldcop), 0)));
57843af0 1639 PUSHs(sv_2mortal(newSViv((I32)CopLINE(cx->blk_oldcop))));
a0d0e21e
LW
1640 if (!MAXARG)
1641 RETURN;
7766f137 1642 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1643 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1644 /* So is ccstack[dbcxix]. */
07b8c804 1645 if (isGV(cvgv)) {
561b68a9 1646 SV * const sv = newSV(0);
c445ea15 1647 gv_efullname3(sv, cvgv, NULL);
07b8c804 1648 PUSHs(sv_2mortal(sv));
cc8d50a7 1649 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804
RGS
1650 }
1651 else {
396482e1 1652 PUSHs(sv_2mortal(newSVpvs("(unknown)")));
cc8d50a7 1653 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804 1654 }
a0d0e21e
LW
1655 }
1656 else {
396482e1 1657 PUSHs(sv_2mortal(newSVpvs("(eval)")));
a0d0e21e
LW
1658 PUSHs(sv_2mortal(newSViv(0)));
1659 }
54310121
PP
1660 gimme = (I32)cx->blk_gimme;
1661 if (gimme == G_VOID)
3280af22 1662 PUSHs(&PL_sv_undef);
54310121
PP
1663 else
1664 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
6b35e009 1665 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1666 /* eval STRING */
06a5b730 1667 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1668 PUSHs(cx->blk_eval.cur_text);
3280af22 1669 PUSHs(&PL_sv_no);
0f79a09d 1670 }
811a4de9 1671 /* require */
0f79a09d
GS
1672 else if (cx->blk_eval.old_namesv) {
1673 PUSHs(sv_2mortal(newSVsv(cx->blk_eval.old_namesv)));
3280af22 1674 PUSHs(&PL_sv_yes);
06a5b730 1675 }
811a4de9
GS
1676 /* eval BLOCK (try blocks have old_namesv == 0) */
1677 else {
1678 PUSHs(&PL_sv_undef);
1679 PUSHs(&PL_sv_undef);
1680 }
4633a7c4 1681 }
a682de96
GS
1682 else {
1683 PUSHs(&PL_sv_undef);
1684 PUSHs(&PL_sv_undef);
1685 }
cc8d50a7 1686 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
ed094faf 1687 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1688 {
66a1b24b
AL
1689 AV * const ary = cx->blk_sub.argarray;
1690 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1691
3280af22 1692 if (!PL_dbargs) {
71315bf2 1693 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1694 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1695 GvMULTI_on(tmpgv);
3ddcf04c 1696 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1697 }
1698
3280af22
NIS
1699 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1700 av_extend(PL_dbargs, AvFILLp(ary) + off);
1701 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1702 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1703 }
f3aa04c2
GS
1704 /* XXX only hints propagated via op_private are currently
1705 * visible (others are not easily accessible, since they
1706 * use the global PL_hints) */
623e6609 1707 PUSHs(sv_2mortal(newSViv(CopHINTS_get(cx->blk_oldcop))));
e476b1b5
GS
1708 {
1709 SV * mask ;
72dc9ed5 1710 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1711
ac27b0f5 1712 if (old_warnings == pWARN_NONE ||
114bafba 1713 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1714 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1715 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1716 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1717 /* Get the bit mask for $warnings::Bits{all}, because
1718 * it could have been extended by warnings::register */
1719 SV **bits_all;
0bd48802 1720 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1721 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1722 mask = newSVsv(*bits_all);
1723 }
1724 else {
1725 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1726 }
1727 }
e476b1b5 1728 else
72dc9ed5 1729 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
e476b1b5
GS
1730 PUSHs(sv_2mortal(mask));
1731 }
b3ca2e83 1732
c28fe1ec 1733 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1734 sv_2mortal(newRV_noinc(
c28fe1ec
NC
1735 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1736 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1737 : &PL_sv_undef);
a0d0e21e
LW
1738 RETURN;
1739}
1740
a0d0e21e
LW
1741PP(pp_reset)
1742{
97aff369 1743 dVAR;
39644a26 1744 dSP;
10edeb5d 1745 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1746 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1747 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1748 RETURN;
1749}
1750
dd2155a4
DM
1751/* like pp_nextstate, but used instead when the debugger is active */
1752
a0d0e21e
LW
1753PP(pp_dbstate)
1754{
27da23d5 1755 dVAR;
533c011a 1756 PL_curcop = (COP*)PL_op;
a0d0e21e 1757 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1758 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1759 FREETMPS;
1760
5df8de69
DM
1761 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1762 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1763 {
39644a26 1764 dSP;
c09156bb 1765 register PERL_CONTEXT *cx;
f54cb97a 1766 const I32 gimme = G_ARRAY;
eb160463 1767 U8 hasargs;
0bd48802
AL
1768 GV * const gv = PL_DBgv;
1769 register CV * const cv = GvCV(gv);
a0d0e21e 1770
a0d0e21e 1771 if (!cv)
cea2e8a9 1772 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1773
aea4f609
DM
1774 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1775 /* don't do recursive DB::DB call */
a0d0e21e 1776 return NORMAL;
748a9306 1777
4633a7c4
LW
1778 ENTER;
1779 SAVETMPS;
1780
3280af22 1781 SAVEI32(PL_debug);
55497cff 1782 SAVESTACK_POS();
3280af22 1783 PL_debug = 0;
748a9306 1784 hasargs = 0;
924508f0 1785 SPAGAIN;
748a9306 1786
aed2304a 1787 if (CvISXSUB(cv)) {
c127bd3a
SF
1788 CvDEPTH(cv)++;
1789 PUSHMARK(SP);
1790 (void)(*CvXSUB(cv))(aTHX_ cv);
1791 CvDEPTH(cv)--;
1792 FREETMPS;
1793 LEAVE;
1794 return NORMAL;
1795 }
1796 else {
1797 PUSHBLOCK(cx, CXt_SUB, SP);
1798 PUSHSUB_DB(cx);
1799 cx->blk_sub.retop = PL_op->op_next;
1800 CvDEPTH(cv)++;
1801 SAVECOMPPAD();
1802 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1803 RETURNOP(CvSTART(cv));
1804 }
a0d0e21e
LW
1805 }
1806 else
1807 return NORMAL;
1808}
1809
a0d0e21e
LW
1810PP(pp_enteriter)
1811{
27da23d5 1812 dVAR; dSP; dMARK;
c09156bb 1813 register PERL_CONTEXT *cx;
f54cb97a 1814 const I32 gimme = GIMME_V;
a0d0e21e 1815 SV **svp;
df43650b 1816 U16 cxtype = CXt_LOOP | CXp_FOREACH;
7766f137
GS
1817#ifdef USE_ITHREADS
1818 void *iterdata;
1819#endif
a0d0e21e 1820
4633a7c4
LW
1821 ENTER;
1822 SAVETMPS;
1823
533c011a 1824 if (PL_op->op_targ) {
14f338dc
DM
1825 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1826 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1827 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1828 SVs_PADSTALE, SVs_PADSTALE);
1829 }
c3564e5c 1830#ifndef USE_ITHREADS
dd2155a4 1831 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
54b9620d 1832 SAVESPTR(*svp);
c3564e5c
GS
1833#else
1834 SAVEPADSV(PL_op->op_targ);
cbfa9890 1835 iterdata = INT2PTR(void*, PL_op->op_targ);
7766f137
GS
1836 cxtype |= CXp_PADVAR;
1837#endif
54b9620d
MB
1838 }
1839 else {
0bd48802 1840 GV * const gv = (GV*)POPs;
7766f137 1841 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1842 SAVEGENERICSV(*svp);
561b68a9 1843 *svp = newSV(0);
7766f137
GS
1844#ifdef USE_ITHREADS
1845 iterdata = (void*)gv;
1846#endif
54b9620d 1847 }
4633a7c4 1848
0d863452
RH
1849 if (PL_op->op_private & OPpITER_DEF)
1850 cxtype |= CXp_FOR_DEF;
1851
a0d0e21e
LW
1852 ENTER;
1853
7766f137
GS
1854 PUSHBLOCK(cx, cxtype, SP);
1855#ifdef USE_ITHREADS
1856 PUSHLOOP(cx, iterdata, MARK);
1857#else
a0d0e21e 1858 PUSHLOOP(cx, svp, MARK);
7766f137 1859#endif
533c011a 1860 if (PL_op->op_flags & OPf_STACKED) {
44a8e56a 1861 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
89ea2908
GA
1862 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1863 dPOPss;
0bd48802 1864 SV * const right = (SV*)cx->blk_loop.iterary;
984a4bea
RD
1865 SvGETMAGIC(sv);
1866 SvGETMAGIC(right);
4fe3f0fa
MHM
1867 if (RANGE_IS_NUMERIC(sv,right)) {
1868 if ((SvOK(sv) && SvNV(sv) < IV_MIN) ||
1869 (SvOK(right) && SvNV(right) >= IV_MAX))
076d9a11
MHM
1870 DIE(aTHX_ "Range iterator outside integer range");
1871 cx->blk_loop.iterix = SvIV(sv);
4fe3f0fa 1872 cx->blk_loop.itermax = SvIV(right);
d4665a05
DM
1873#ifdef DEBUGGING
1874 /* for correct -Dstv display */
1875 cx->blk_oldsp = sp - PL_stack_base;
1876#endif
89ea2908 1877 }
3f63a782 1878 else {
89ea2908 1879 cx->blk_loop.iterlval = newSVsv(sv);
13c5b33c 1880 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
10516c54 1881 (void) SvPV_nolen_const(right);
3f63a782 1882 }
89ea2908 1883 }
ef3e5ea9 1884 else if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1885 cx->blk_loop.itermax = 0;
1886 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary) + 1;
ef3e5ea9
NC
1887
1888 }
89ea2908 1889 }
4633a7c4 1890 else {
3280af22
NIS
1891 cx->blk_loop.iterary = PL_curstack;
1892 AvFILLp(PL_curstack) = SP - PL_stack_base;
ef3e5ea9 1893 if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1894 cx->blk_loop.itermax = MARK - PL_stack_base + 1;
1895 cx->blk_loop.iterix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1896 }
1897 else {
1898 cx->blk_loop.iterix = MARK - PL_stack_base;
1899 }
4633a7c4 1900 }
a0d0e21e
LW
1901
1902 RETURN;
1903}
1904
1905PP(pp_enterloop)
1906{
27da23d5 1907 dVAR; dSP;
c09156bb 1908 register PERL_CONTEXT *cx;
f54cb97a 1909 const I32 gimme = GIMME_V;
a0d0e21e
LW
1910
1911 ENTER;
1912 SAVETMPS;
1913 ENTER;
1914
1915 PUSHBLOCK(cx, CXt_LOOP, SP);
1916 PUSHLOOP(cx, 0, SP);
1917
1918 RETURN;
1919}
1920
1921PP(pp_leaveloop)
1922{
27da23d5 1923 dVAR; dSP;
c09156bb 1924 register PERL_CONTEXT *cx;
a0d0e21e
LW
1925 I32 gimme;
1926 SV **newsp;
1927 PMOP *newpm;
1928 SV **mark;
1929
1930 POPBLOCK(cx,newpm);
3a1b2b9e 1931 assert(CxTYPE(cx) == CXt_LOOP);
4fdae800 1932 mark = newsp;
a8bba7fa 1933 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1934
a1f49e72 1935 TAINT_NOT;
54310121 1936 if (gimme == G_VOID)
6f207bd3 1937 NOOP;
54310121
PP
1938 else if (gimme == G_SCALAR) {
1939 if (mark < SP)
1940 *++newsp = sv_mortalcopy(*SP);
1941 else
3280af22 1942 *++newsp = &PL_sv_undef;
a0d0e21e
LW
1943 }
1944 else {
a1f49e72 1945 while (mark < SP) {
a0d0e21e 1946 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
1947 TAINT_NOT; /* Each item is independent */
1948 }
a0d0e21e 1949 }
f86702cc
PP
1950 SP = newsp;
1951 PUTBACK;
1952
a8bba7fa 1953 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 1954 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 1955
a0d0e21e
LW
1956 LEAVE;
1957 LEAVE;
1958
f86702cc 1959 return NORMAL;
a0d0e21e
LW
1960}
1961
1962PP(pp_return)
1963{
27da23d5 1964 dVAR; dSP; dMARK;
c09156bb 1965 register PERL_CONTEXT *cx;
f86702cc 1966 bool popsub2 = FALSE;
b45de488 1967 bool clear_errsv = FALSE;
a0d0e21e
LW
1968 I32 gimme;
1969 SV **newsp;
1970 PMOP *newpm;
1971 I32 optype = 0;
b0d9ce38 1972 SV *sv;
f39bc417 1973 OP *retop;
a0d0e21e 1974
0bd48802
AL
1975 const I32 cxix = dopoptosub(cxstack_ix);
1976
9850bf21
RH
1977 if (cxix < 0) {
1978 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
1979 * sort block, which is a CXt_NULL
1980 * not a CXt_SUB */
1981 dounwind(0);
d7507f74
RH
1982 PL_stack_base[1] = *PL_stack_sp;
1983 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
1984 return 0;
1985 }
9850bf21
RH
1986 else
1987 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 1988 }
a0d0e21e
LW
1989 if (cxix < cxstack_ix)
1990 dounwind(cxix);
1991
d7507f74
RH
1992 if (CxMULTICALL(&cxstack[cxix])) {
1993 gimme = cxstack[cxix].blk_gimme;
1994 if (gimme == G_VOID)
1995 PL_stack_sp = PL_stack_base;
1996 else if (gimme == G_SCALAR) {
1997 PL_stack_base[1] = *PL_stack_sp;
1998 PL_stack_sp = PL_stack_base + 1;
1999 }
9850bf21 2000 return 0;
d7507f74 2001 }
9850bf21 2002
a0d0e21e 2003 POPBLOCK(cx,newpm);
6b35e009 2004 switch (CxTYPE(cx)) {
a0d0e21e 2005 case CXt_SUB:
f86702cc 2006 popsub2 = TRUE;
f39bc417 2007 retop = cx->blk_sub.retop;
5dd42e15 2008 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2009 break;
2010 case CXt_EVAL:
b45de488
GS
2011 if (!(PL_in_eval & EVAL_KEEPERR))
2012 clear_errsv = TRUE;
a0d0e21e 2013 POPEVAL(cx);
f39bc417 2014 retop = cx->blk_eval.retop;
1d76a5c3
GS
2015 if (CxTRYBLOCK(cx))
2016 break;
067f92a0 2017 lex_end();
748a9306
LW
2018 if (optype == OP_REQUIRE &&
2019 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2020 {
54310121 2021 /* Unassume the success we assumed earlier. */
901017d6 2022 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2023 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2024 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2025 }
a0d0e21e 2026 break;
7766f137
GS
2027 case CXt_FORMAT:
2028 POPFORMAT(cx);
f39bc417 2029 retop = cx->blk_sub.retop;
7766f137 2030 break;
a0d0e21e 2031 default:
cea2e8a9 2032 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2033 }
2034
a1f49e72 2035 TAINT_NOT;
a0d0e21e 2036 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2037 if (MARK < SP) {
2038 if (popsub2) {
a8bba7fa 2039 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2040 if (SvTEMP(TOPs)) {
2041 *++newsp = SvREFCNT_inc(*SP);
2042 FREETMPS;
2043 sv_2mortal(*newsp);
959e3673
GS
2044 }
2045 else {
2046 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2047 FREETMPS;
959e3673
GS
2048 *++newsp = sv_mortalcopy(sv);
2049 SvREFCNT_dec(sv);
a29cdaf0 2050 }
959e3673
GS
2051 }
2052 else
a29cdaf0 2053 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2054 }
2055 else
a29cdaf0 2056 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2057 }
2058 else
3280af22 2059 *++newsp = &PL_sv_undef;
a0d0e21e 2060 }
54310121 2061 else if (gimme == G_ARRAY) {
a1f49e72 2062 while (++MARK <= SP) {
f86702cc
PP
2063 *++newsp = (popsub2 && SvTEMP(*MARK))
2064 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2065 TAINT_NOT; /* Each item is independent */
2066 }
a0d0e21e 2067 }
3280af22 2068 PL_stack_sp = newsp;
a0d0e21e 2069
5dd42e15 2070 LEAVE;
f86702cc
PP
2071 /* Stack values are safe: */
2072 if (popsub2) {
5dd42e15 2073 cxstack_ix--;
b0d9ce38 2074 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2075 }
b0d9ce38 2076 else
c445ea15 2077 sv = NULL;
3280af22 2078 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2079
b0d9ce38 2080 LEAVESUB(sv);
b45de488 2081 if (clear_errsv)
c69006e4 2082 sv_setpvn(ERRSV,"",0);
f39bc417 2083 return retop;
a0d0e21e
LW
2084}
2085
2086PP(pp_last)
2087{
27da23d5 2088 dVAR; dSP;
a0d0e21e 2089 I32 cxix;
c09156bb 2090 register PERL_CONTEXT *cx;
f86702cc 2091 I32 pop2 = 0;
a0d0e21e 2092 I32 gimme;
8772537c 2093 I32 optype;
a0d0e21e
LW
2094 OP *nextop;
2095 SV **newsp;
2096 PMOP *newpm;
a8bba7fa 2097 SV **mark;
c445ea15 2098 SV *sv = NULL;
9d4ba2ae 2099
a0d0e21e 2100
533c011a 2101 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2102 cxix = dopoptoloop(cxstack_ix);
2103 if (cxix < 0)
a651a37d 2104 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2105 }
2106 else {
2107 cxix = dopoptolabel(cPVOP->op_pv);
2108 if (cxix < 0)
cea2e8a9 2109 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2110 }
2111 if (cxix < cxstack_ix)
2112 dounwind(cxix);
2113
2114 POPBLOCK(cx,newpm);
5dd42e15 2115 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2116 mark = newsp;
6b35e009 2117 switch (CxTYPE(cx)) {
a0d0e21e 2118 case CXt_LOOP:
f86702cc 2119 pop2 = CXt_LOOP;
a8bba7fa 2120 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2121 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2122 break;
f86702cc 2123 case CXt_SUB:
f86702cc 2124 pop2 = CXt_SUB;
f39bc417 2125 nextop = cx->blk_sub.retop;
a0d0e21e 2126 break;
f86702cc
PP
2127 case CXt_EVAL:
2128 POPEVAL(cx);
f39bc417 2129 nextop = cx->blk_eval.retop;
a0d0e21e 2130 break;
7766f137
GS
2131 case CXt_FORMAT:
2132 POPFORMAT(cx);
f39bc417 2133 nextop = cx->blk_sub.retop;
7766f137 2134 break;
a0d0e21e 2135 default:
cea2e8a9 2136 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2137 }
2138
a1f49e72 2139 TAINT_NOT;
a0d0e21e 2140 if (gimme == G_SCALAR) {
f86702cc
PP
2141 if (MARK < SP)
2142 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2143 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2144 else
3280af22 2145 *++newsp = &PL_sv_undef;
a0d0e21e 2146 }
54310121 2147 else if (gimme == G_ARRAY) {
a1f49e72 2148 while (++MARK <= SP) {
f86702cc
PP
2149 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2150 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2151 TAINT_NOT; /* Each item is independent */
2152 }
f86702cc
PP
2153 }
2154 SP = newsp;
2155 PUTBACK;
2156
5dd42e15
DM
2157 LEAVE;
2158 cxstack_ix--;
f86702cc
PP
2159 /* Stack values are safe: */
2160 switch (pop2) {
2161 case CXt_LOOP:
a8bba7fa 2162 POPLOOP(cx); /* release loop vars ... */
4fdae800 2163 LEAVE;
f86702cc
PP
2164 break;
2165 case CXt_SUB:
b0d9ce38 2166 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2167 break;
a0d0e21e 2168 }
3280af22 2169 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2170
b0d9ce38 2171 LEAVESUB(sv);
9d4ba2ae
AL
2172 PERL_UNUSED_VAR(optype);
2173 PERL_UNUSED_VAR(gimme);
f86702cc 2174 return nextop;
a0d0e21e
LW
2175}
2176
2177PP(pp_next)
2178{
27da23d5 2179 dVAR;
a0d0e21e 2180 I32 cxix;
c09156bb 2181 register PERL_CONTEXT *cx;
85538317 2182 I32 inner;
a0d0e21e 2183
533c011a 2184 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2185 cxix = dopoptoloop(cxstack_ix);
2186 if (cxix < 0)
a651a37d 2187 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2188 }
2189 else {
2190 cxix = dopoptolabel(cPVOP->op_pv);
2191 if (cxix < 0)
cea2e8a9 2192 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2193 }
2194 if (cxix < cxstack_ix)
2195 dounwind(cxix);
2196
85538317
GS
2197 /* clear off anything above the scope we're re-entering, but
2198 * save the rest until after a possible continue block */
2199 inner = PL_scopestack_ix;
1ba6ee2b 2200 TOPBLOCK(cx);
85538317
GS
2201 if (PL_scopestack_ix < inner)
2202 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2203 PL_curcop = cx->blk_oldcop;
022eaa24 2204 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2205}
2206
2207PP(pp_redo)
2208{
27da23d5 2209 dVAR;
a0d0e21e 2210 I32 cxix;
c09156bb 2211 register PERL_CONTEXT *cx;
a0d0e21e 2212 I32 oldsave;
a034e688 2213 OP* redo_op;
a0d0e21e 2214
533c011a 2215 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2216 cxix = dopoptoloop(cxstack_ix);
2217 if (cxix < 0)
a651a37d 2218 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2219 }
2220 else {
2221 cxix = dopoptolabel(cPVOP->op_pv);
2222 if (cxix < 0)
cea2e8a9 2223 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2224 }
2225 if (cxix < cxstack_ix)
2226 dounwind(cxix);
2227
022eaa24 2228 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2229 if (redo_op->op_type == OP_ENTER) {
2230 /* pop one less context to avoid $x being freed in while (my $x..) */
2231 cxstack_ix++;
2232 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2233 redo_op = redo_op->op_next;
2234 }
2235
a0d0e21e 2236 TOPBLOCK(cx);
3280af22 2237 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2238 LEAVE_SCOPE(oldsave);
936c78b5 2239 FREETMPS;
3a1b2b9e 2240 PL_curcop = cx->blk_oldcop;
a034e688 2241 return redo_op;
a0d0e21e
LW
2242}
2243
0824fdcb 2244STATIC OP *
bfed75c6 2245S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2246{
97aff369 2247 dVAR;
a0d0e21e 2248 OP **ops = opstack;
bfed75c6 2249 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2250
fc36a67e 2251 if (ops >= oplimit)
cea2e8a9 2252 Perl_croak(aTHX_ too_deep);
11343788
MB
2253 if (o->op_type == OP_LEAVE ||
2254 o->op_type == OP_SCOPE ||
2255 o->op_type == OP_LEAVELOOP ||
33d34e4c 2256 o->op_type == OP_LEAVESUB ||
11343788 2257 o->op_type == OP_LEAVETRY)
fc36a67e 2258 {
5dc0d613 2259 *ops++ = cUNOPo->op_first;
fc36a67e 2260 if (ops >= oplimit)
cea2e8a9 2261 Perl_croak(aTHX_ too_deep);
fc36a67e 2262 }
c4aa4e48 2263 *ops = 0;
11343788 2264 if (o->op_flags & OPf_KIDS) {
aec46f14 2265 OP *kid;
a0d0e21e 2266 /* First try all the kids at this level, since that's likeliest. */
11343788 2267 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS
2268 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2269 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW
2270 return kid;
2271 }
11343788 2272 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2273 if (kid == PL_lastgotoprobe)
a0d0e21e 2274 continue;
ed8d0fe2
SM
2275 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2276 if (ops == opstack)
2277 *ops++ = kid;
2278 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2279 ops[-1]->op_type == OP_DBSTATE)
2280 ops[-1] = kid;
2281 else
2282 *ops++ = kid;
2283 }
155aba94 2284 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2285 return o;
a0d0e21e
LW
2286 }
2287 }
c4aa4e48 2288 *ops = 0;
a0d0e21e
LW
2289 return 0;
2290}
2291
a0d0e21e
LW
2292PP(pp_goto)
2293{
27da23d5 2294 dVAR; dSP;
cbbf8932 2295 OP *retop = NULL;
a0d0e21e 2296 I32 ix;
c09156bb 2297 register PERL_CONTEXT *cx;
fc36a67e
PP
2298#define GOTO_DEPTH 64
2299 OP *enterops[GOTO_DEPTH];
cbbf8932 2300 const char *label = NULL;
bfed75c6
AL
2301 const bool do_dump = (PL_op->op_type == OP_DUMP);
2302 static const char must_have_label[] = "goto must have label";
a0d0e21e 2303
533c011a 2304 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2305 SV * const sv = POPs;
a0d0e21e
LW
2306
2307 /* This egregious kludge implements goto &subroutine */
2308 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2309 I32 cxix;
c09156bb 2310 register PERL_CONTEXT *cx;
a0d0e21e
LW
2311 CV* cv = (CV*)SvRV(sv);
2312 SV** mark;
2313 I32 items = 0;
2314 I32 oldsave;
b1464ded 2315 bool reified = 0;
a0d0e21e 2316
e8f7dd13 2317 retry:
4aa0a1f7 2318 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2319 const GV * const gv = CvGV(cv);
e8f7dd13 2320 if (gv) {
7fc63493 2321 GV *autogv;
e8f7dd13
GS
2322 SV *tmpstr;
2323 /* autoloaded stub? */
2324 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2325 goto retry;
2326 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2327 GvNAMELEN(gv), FALSE);
2328 if (autogv && (cv = GvCV(autogv)))
2329 goto retry;
2330 tmpstr = sv_newmortal();
c445ea15 2331 gv_efullname3(tmpstr, gv, NULL);
be2597df 2332 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2333 }
cea2e8a9 2334 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2335 }
2336
a0d0e21e 2337 /* First do some returnish stuff. */
b37c2d43 2338 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2339 FREETMPS;
a0d0e21e
LW
2340 cxix = dopoptosub(cxstack_ix);
2341 if (cxix < 0)
cea2e8a9 2342 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2343 if (cxix < cxstack_ix)
2344 dounwind(cxix);
2345 TOPBLOCK(cx);
2d43a17f 2346 SPAGAIN;
564abe23 2347 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2348 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2349 if (CxREALEVAL(cx))
2350 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2351 else
2352 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2353 }
9850bf21
RH
2354 else if (CxMULTICALL(cx))
2355 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
cc8d50a7 2356 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
d8b46c1b 2357 /* put @_ back onto stack */
a0d0e21e 2358 AV* av = cx->blk_sub.argarray;
bfed75c6 2359
93965878 2360 items = AvFILLp(av) + 1;
a45cdc79
DM
2361 EXTEND(SP, items+1); /* @_ could have been extended. */
2362 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2363 SvREFCNT_dec(GvAV(PL_defgv));
2364 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2365 CLEAR_ARGARRAY(av);
d8b46c1b 2366 /* abandon @_ if it got reified */
62b1ebc2 2367 if (AvREAL(av)) {
b1464ded
DM
2368 reified = 1;
2369 SvREFCNT_dec(av);
d8b46c1b
GS
2370 av = newAV();
2371 av_extend(av, items-1);
11ca45c0 2372 AvREIFY_only(av);
dd2155a4 2373 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2374 }
a0d0e21e 2375 }
aed2304a 2376 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2377 AV* const av = GvAV(PL_defgv);
1fa4e549 2378 items = AvFILLp(av) + 1;
a45cdc79
DM
2379 EXTEND(SP, items+1); /* @_ could have been extended. */
2380 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2381 }
a45cdc79
DM
2382 mark = SP;
2383 SP += items;
6b35e009 2384 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2385 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2386 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2387 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2388 LEAVE_SCOPE(oldsave);
2389
2390 /* Now do some callish stuff. */
2391 SAVETMPS;
5023d17a 2392 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2393 if (CvISXSUB(cv)) {
b37c2d43 2394 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2395 SV **newsp;
2396 I32 gimme;
b1464ded
DM
2397 if (reified) {
2398 I32 index;
2399 for (index=0; index<items; index++)
2400 sv_2mortal(SP[-index]);
2401 }
1fa4e549 2402
b37c2d43
AL
2403 /* XS subs don't have a CxSUB, so pop it */
2404 POPBLOCK(cx, PL_curpm);
2405 /* Push a mark for the start of arglist */
2406 PUSHMARK(mark);
2407 PUTBACK;
2408 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2409 LEAVE;
5eff7df7 2410 return retop;
a0d0e21e
LW
2411 }
2412 else {
b37c2d43 2413 AV* const padlist = CvPADLIST(cv);
6b35e009 2414 if (CxTYPE(cx) == CXt_EVAL) {
3280af22
NIS
2415 PL_in_eval = cx->blk_eval.old_in_eval;
2416 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2417 cx->cx_type = CXt_SUB;
cc8d50a7 2418 cx->blk_sub.hasargs = 0;
b150fb22 2419 }
a0d0e21e 2420 cx->blk_sub.cv = cv;
1a5b3db4 2421 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2422
a0d0e21e
LW
2423 CvDEPTH(cv)++;
2424 if (CvDEPTH(cv) < 2)
74c765eb 2425 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2426 else {
599cee73 2427 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
44a8e56a 2428 sub_crush_depth(cv);
26019298 2429 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2430 }
fd617465
DM
2431 SAVECOMPPAD();
2432 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
cc8d50a7 2433 if (cx->blk_sub.hasargs)
6d4ff0d2 2434 {
b37c2d43 2435 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2436
3280af22 2437 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2438 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2439 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2440 cx->blk_sub.argarray = av;
a0d0e21e
LW
2441
2442 if (items >= AvMAX(av) + 1) {
b37c2d43 2443 SV **ary = AvALLOC(av);
a0d0e21e
LW
2444 if (AvARRAY(av) != ary) {
2445 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2446 AvARRAY(av) = ary;
a0d0e21e
LW
2447 }
2448 if (items >= AvMAX(av) + 1) {
2449 AvMAX(av) = items - 1;
2450 Renew(ary,items+1,SV*);
2451 AvALLOC(av) = ary;
9c6bc640 2452 AvARRAY(av) = ary;
a0d0e21e
LW
2453 }
2454 }
a45cdc79 2455 ++mark;
a0d0e21e 2456 Copy(mark,AvARRAY(av),items,SV*);
93965878 2457 AvFILLp(av) = items - 1;
d8b46c1b 2458 assert(!AvREAL(av));
b1464ded
DM
2459 if (reified) {
2460 /* transfer 'ownership' of refcnts to new @_ */
2461 AvREAL_on(av);
2462 AvREIFY_off(av);
2463 }
a0d0e21e
LW
2464 while (items--) {
2465 if (*mark)
2466 SvTEMP_off(*mark);
2467 mark++;
2468 }
2469 }
491527d0 2470 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2471 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL
2472 if (PERLDB_GOTO) {
2473 CV * const gotocv = get_cv("DB::goto", FALSE);
2474 if (gotocv) {
2475 PUSHMARK( PL_stack_sp );
2476 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2477 PL_stack_sp--;
2478 }
491527d0 2479 }
1ce6579f 2480 }
a0d0e21e
LW
2481 RETURNOP(CvSTART(cv));
2482 }
2483 }
1614b0e3 2484 else {
0510663f 2485 label = SvPV_nolen_const(sv);
1614b0e3 2486 if (!(do_dump || *label))
cea2e8a9 2487 DIE(aTHX_ must_have_label);
1614b0e3 2488 }
a0d0e21e 2489 }
533c011a 2490 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2491 if (! do_dump)
cea2e8a9 2492 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2493 }
2494 else
2495 label = cPVOP->op_pv;
2496
2497 if (label && *label) {
cbbf8932 2498 OP *gotoprobe = NULL;
3b2447bc 2499 bool leaving_eval = FALSE;
33d34e4c 2500 bool in_block = FALSE;
cbbf8932 2501 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2502
2503 /* find label */
2504
d4c19fe8 2505 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2506 *enterops = 0;
2507 for (ix = cxstack_ix; ix >= 0; ix--) {
2508 cx = &cxstack[ix];
6b35e009 2509 switch (CxTYPE(cx)) {
a0d0e21e 2510 case CXt_EVAL:
3b2447bc 2511 leaving_eval = TRUE;
971ecbe6 2512 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2513 gotoprobe = (last_eval_cx ?
2514 last_eval_cx->blk_eval.old_eval_root :
2515 PL_eval_root);
2516 last_eval_cx = cx;
9c5794fe
RH
2517 break;
2518 }
2519 /* else fall through */
a0d0e21e
LW
2520 case CXt_LOOP:
2521 gotoprobe = cx->blk_oldcop->op_sibling;
2522 break;
2523 case CXt_SUBST:
2524 continue;
2525 case CXt_BLOCK:
33d34e4c 2526 if (ix) {
a0d0e21e 2527 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2528 in_block = TRUE;
2529 } else
3280af22 2530 gotoprobe = PL_main_root;
a0d0e21e 2531 break;
b3933176 2532 case CXt_SUB:
9850bf21 2533 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2534 gotoprobe = CvROOT(cx->blk_sub.cv);
2535 break;
2536 }
2537 /* FALL THROUGH */
7766f137 2538 case CXt_FORMAT:
0a753a76 2539 case CXt_NULL:
a651a37d 2540 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2541 default:
2542 if (ix)
cea2e8a9 2543 DIE(aTHX_ "panic: goto");
3280af22 2544 gotoprobe = PL_main_root;
a0d0e21e
LW
2545 break;
2546 }
2b597662
GS
2547 if (gotoprobe) {
2548 retop = dofindlabel(gotoprobe, label,
2549 enterops, enterops + GOTO_DEPTH);
2550 if (retop)
2551 break;
2552 }
3280af22 2553 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2554 }
2555 if (!retop)
cea2e8a9 2556 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2557
3b2447bc
RH
2558 /* if we're leaving an eval, check before we pop any frames
2559 that we're not going to punt, otherwise the error
2560 won't be caught */
2561
2562 if (leaving_eval && *enterops && enterops[1]) {
2563 I32 i;
2564 for (i = 1; enterops[i]; i++)
2565 if (enterops[i]->op_type == OP_ENTERITER)
2566 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2567 }
2568
a0d0e21e
LW
2569 /* pop unwanted frames */
2570
2571 if (ix < cxstack_ix) {
2572 I32 oldsave;
2573
2574 if (ix < 0)
2575 ix = 0;
2576 dounwind(ix);
2577 TOPBLOCK(cx);
3280af22 2578 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2579 LEAVE_SCOPE(oldsave);
2580 }
2581
2582 /* push wanted frames */
2583
748a9306 2584 if (*enterops && enterops[1]) {
0bd48802 2585 OP * const oldop = PL_op;
33d34e4c
AE
2586 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2587 for (; enterops[ix]; ix++) {
533c011a 2588 PL_op = enterops[ix];
84902520
TB
2589 /* Eventually we may want to stack the needed arguments
2590 * for each op. For now, we punt on the hard ones. */
533c011a 2591 if (PL_op->op_type == OP_ENTERITER)
894356b3 2592 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2593 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2594 }
533c011a 2595 PL_op = oldop;
a0d0e21e
LW
2596 }
2597 }
2598
2599 if (do_dump) {
a5f75d66 2600#ifdef VMS
6b88bc9c 2601 if (!retop) retop = PL_main_start;
a5f75d66 2602#endif
3280af22
NIS
2603 PL_restartop = retop;
2604 PL_do_undump = TRUE;
a0d0e21e
LW
2605
2606 my_unexec();
2607
3280af22
NIS
2608 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2609 PL_do_undump = FALSE;
a0d0e21e
LW
2610 }
2611
2612 RETURNOP(retop);
2613}
2614
2615PP(pp_exit)
2616{
97aff369 2617 dVAR;
39644a26 2618 dSP;
a0d0e21e
LW
2619 I32 anum;
2620
2621 if (MAXARG < 1)
2622 anum = 0;
ff0cee69 2623 else {
a0d0e21e 2624 anum = SvIVx(POPs);
d98f61e7
GS
2625#ifdef VMS
2626 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2627 anum = 0;
96e176bf 2628 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2629#endif
2630 }
cc3604b1 2631 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2632#ifdef PERL_MAD
2633 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2634 if (anum || !(PL_minus_c && PL_madskills))
2635 my_exit(anum);
2636#else
a0d0e21e 2637 my_exit(anum);
81d86705 2638#endif
3280af22 2639 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2640 RETURN;
2641}
2642
a0d0e21e
LW
2643/* Eval. */
2644
0824fdcb 2645STATIC void
cea2e8a9 2646S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2647{
504618e9 2648 const char *s = SvPVX_const(sv);
890ce7af 2649 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2650 I32 line = 1;
a0d0e21e
LW
2651
2652 while (s && s < send) {
f54cb97a 2653 const char *t;
b9f83d2f 2654 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2655
a0d0e21e
LW
2656 t = strchr(s, '\n');
2657 if (t)
2658 t++;
2659 else
2660 t = send;
2661
2662 sv_setpvn(tmpstr, s, t - s);
2663 av_store(array, line++, tmpstr);
2664 s = t;
2665 }
2666}
2667
901017d6 2668STATIC void
14dd3ad8
GS
2669S_docatch_body(pTHX)
2670{
97aff369 2671 dVAR;
cea2e8a9 2672 CALLRUNOPS(aTHX);
901017d6 2673 return;
312caa8e
CS
2674}
2675
0824fdcb 2676STATIC OP *
cea2e8a9 2677S_docatch(pTHX_ OP *o)
1e422769 2678{
97aff369 2679 dVAR;
6224f72b 2680 int ret;
06b5626a 2681 OP * const oldop = PL_op;
db36c5a1 2682 dJMPENV;
1e422769 2683
1e422769 2684#ifdef DEBUGGING
54310121 2685 assert(CATCH_GET == TRUE);
1e422769 2686#endif
312caa8e 2687 PL_op = o;
8bffa5f8 2688
14dd3ad8 2689 JMPENV_PUSH(ret);
6224f72b 2690 switch (ret) {
312caa8e 2691 case 0:
abd70938
DM
2692 assert(cxstack_ix >= 0);
2693 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2694 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8
GS
2695 redo_body:
2696 docatch_body();
312caa8e
CS
2697 break;
2698 case 3:
8bffa5f8 2699 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2700
2701 /* NB XXX we rely on the old popped CxEVAL still being at the top
2702 * of the stack; the way die_where() currently works, this
2703 * assumption is valid. In theory The cur_top_env value should be
2704 * returned in another global, the way retop (aka PL_restartop)
2705 * is. */
2706 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2707
2708 if (PL_restartop
2709 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2710 {
312caa8e
CS
2711 PL_op = PL_restartop;
2712 PL_restartop = 0;
2713 goto redo_body;
2714 }
2715 /* FALL THROUGH */
2716 default:
14dd3ad8 2717 JMPENV_POP;
533c011a 2718 PL_op = oldop;
6224f72b 2719 JMPENV_JUMP(ret);
1e422769 2720 /* NOTREACHED */
1e422769 2721 }
14dd3ad8 2722 JMPENV_POP;
533c011a 2723 PL_op = oldop;
5f66b61c 2724 return NULL;
1e422769
PP
2725}
2726
c277df42 2727OP *
bfed75c6 2728Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2729/* sv Text to convert to OP tree. */
2730/* startop op_free() this to undo. */
2731/* code Short string id of the caller. */
2732{
f7997f86 2733 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2734 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2735 PERL_CONTEXT *cx;
2736 SV **newsp;
b094c71d 2737 I32 gimme = G_VOID;
c277df42
IZ
2738 I32 optype;
2739 OP dummy;
83ee9e09
GS
2740 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2741 char *tmpbuf = tbuf;
c277df42 2742 char *safestr;
a3985cdc 2743 int runtime;
601f1833 2744 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2745 STRLEN len;
c277df42
IZ
2746
2747 ENTER;
5486870f 2748 lex_start(sv, NULL, FALSE);
c277df42
IZ
2749 SAVETMPS;
2750 /* switch to eval mode */
2751
923e4eb5 2752 if (IN_PERL_COMPILETIME) {
f4dd75d9 2753 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2754 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2755 }
83ee9e09 2756 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2757 SV * const sv = sv_newmortal();
83ee9e09
GS
2758 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2759 code, (unsigned long)++PL_evalseq,
2760 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2761 tmpbuf = SvPVX(sv);
fc009855 2762 len = SvCUR(sv);
83ee9e09
GS
2763 }
2764 else
d9fad198
JH
2765 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2766 (unsigned long)++PL_evalseq);
f4dd75d9 2767 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2768 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2769 SAVECOPLINE(&PL_compiling);
57843af0 2770 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2771 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2772 deleting the eval's FILEGV from the stash before gv_check() runs
2773 (i.e. before run-time proper). To work around the coredump that
2774 ensues, we always turn GvMULTI_on for any globals that were
2775 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2776 safestr = savepvn(tmpbuf, len);
2777 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2778 SAVEHINTS();
d1ca3daa 2779#ifdef OP_IN_REGISTER
6b88bc9c 2780 PL_opsave = op;
d1ca3daa 2781#else
7766f137 2782 SAVEVPTR(PL_op);
d1ca3daa 2783#endif
c277df42 2784
a3985cdc 2785 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2786 runtime = IN_PERL_RUNTIME;
a3985cdc 2787 if (runtime)
d819b83a 2788 runcv = find_runcv(NULL);
a3985cdc 2789
533c011a 2790 PL_op = &dummy;
13b51b79 2791 PL_op->op_type = OP_ENTEREVAL;
533c011a 2792 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2793 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
a0714e2c 2794 PUSHEVAL(cx, 0, NULL);
a3985cdc
DM
2795
2796 if (runtime)
410be5db 2797 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2798 else
410be5db 2799 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2800 POPBLOCK(cx,PL_curpm);
e84b9f1f 2801 POPEVAL(cx);
c277df42
IZ
2802
2803 (*startop)->op_type = OP_NULL;
22c35a8c 2804 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2805 lex_end();
f3548bdc 2806 /* XXX DAPM do this properly one year */
b37c2d43 2807 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2808 LEAVE;
923e4eb5 2809 if (IN_PERL_COMPILETIME)
623e6609 2810 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2811#ifdef OP_IN_REGISTER
6b88bc9c 2812 op = PL_opsave;
d1ca3daa 2813#endif
9d4ba2ae
AL
2814 PERL_UNUSED_VAR(newsp);
2815 PERL_UNUSED_VAR(optype);
2816
410be5db 2817 return PL_eval_start;
c277df42
IZ
2818}
2819
a3985cdc
DM
2820
2821/*
2822=for apidoc find_runcv
2823
2824Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2825If db_seqp is non_null, skip CVs that are in the DB package and populate
2826*db_seqp with the cop sequence number at the point that the DB:: code was
2827entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2828than in the scope of the debugger itself).
a3985cdc
DM
2829
2830=cut
2831*/
2832
2833CV*
d819b83a 2834Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2835{
97aff369 2836 dVAR;
a3985cdc 2837 PERL_SI *si;
a3985cdc 2838
d819b83a
DM
2839 if (db_seqp)
2840 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2841 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2842 I32 ix;
a3985cdc 2843 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2844 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2845 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2846 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2847 /* skip DB:: code */
2848 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2849 *db_seqp = cx->blk_oldcop->cop_seq;
2850 continue;
2851 }
2852 return cv;
2853 }
a3985cdc
DM
2854 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2855 return PL_compcv;
2856 }
2857 }
2858 return PL_main_cv;
2859}
2860
2861
2862/* Compile a require/do, an eval '', or a /(?{...})/.
2863 * In the last case, startop is non-null, and contains the address of
2864 * a pointer that should be set to the just-compiled code.
2865 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM
2866 * Returns a bool indicating whether the compile was successful; if so,
2867 * PL_eval_start contains the first op of the compiled ocde; otherwise,
2868 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM
2869 */
2870
410be5db 2871STATIC bool
a3985cdc 2872S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2873{
27da23d5 2874 dVAR; dSP;
46c461b5 2875 OP * const saveop = PL_op;
a0d0e21e 2876
6dc8a9e4
IZ
2877 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2878 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2879 : EVAL_INEVAL);
a0d0e21e 2880
1ce6579f
PP
2881 PUSHMARK(SP);
2882
3280af22 2883 SAVESPTR(PL_compcv);
b9f83d2f 2884 PL_compcv = (CV*)newSV_type(SVt_PVCV);
1aff0e91 2885 CvEVAL_on(PL_compcv);
2090ab20
JH
2886 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2887 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2888
a3985cdc 2889 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2890 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2891
dd2155a4 2892 /* set up a scratch pad */
a0d0e21e 2893
dd2155a4 2894 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2895 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2896
07055b4c 2897
81d86705
NC
2898 if (!PL_madskills)
2899 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2900
a0d0e21e
LW
2901 /* make sure we compile in the right package */
2902
ed094faf 2903 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2904 SAVESPTR(PL_curstash);
ed094faf 2905 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2906 }
3c10abe3 2907 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
2908 SAVESPTR(PL_beginav);
2909 PL_beginav = newAV();
2910 SAVEFREESV(PL_beginav);
3c10abe3
AG
2911 SAVESPTR(PL_unitcheckav);
2912 PL_unitcheckav = newAV();
2913 SAVEFREESV(PL_unitcheckav);
a0d0e21e 2914
81d86705 2915#ifdef PERL_MAD
9da243ce 2916 SAVEBOOL(PL_madskills);
81d86705
NC
2917 PL_madskills = 0;
2918#endif
2919
a0d0e21e
LW
2920 /* try to compile it */
2921
5f66b61c 2922 PL_eval_root = NULL;
3280af22 2923 PL_curcop = &PL_compiling;
fc15ae8f 2924 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2925 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2926 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2927 else
c69006e4 2928 sv_setpvn(ERRSV,"",0);
13765c85 2929 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 2930 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2931 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2932 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2933 const char *msg;
bfed75c6 2934
533c011a 2935 PL_op = saveop;
3280af22
NIS
2936 if (PL_eval_root) {
2937 op_free(PL_eval_root);
5f66b61c 2938 PL_eval_root = NULL;
a0d0e21e 2939 }
3280af22 2940 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2941 if (!startop) {
3280af22 2942 POPBLOCK(cx,PL_curpm);
c277df42 2943 POPEVAL(cx);
c277df42 2944 }
a0d0e21e
LW
2945 lex_end();
2946 LEAVE;
9d4ba2ae
AL
2947
2948 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 2949 if (optype == OP_REQUIRE) {
b464bac0 2950 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 2951 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 2952 &PL_sv_undef, 0);
58d3fd3b
SH
2953 Perl_croak(aTHX_ "%sCompilation failed in require",
2954 *msg ? msg : "Unknown error\n");
5a844595
GS
2955 }
2956 else if (startop) {
3280af22 2957 POPBLOCK(cx,PL_curpm);
c277df42 2958 POPEVAL(cx);
5a844595
GS
2959 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2960 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 2961 }
9d7f88dd 2962 else {
9d7f88dd 2963 if (!*msg) {
6502358f 2964 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
2965 }
2966 }
9d4ba2ae 2967 PERL_UNUSED_VAR(newsp);
410be5db
DM
2968 PUSHs(&PL_sv_undef);
2969 PUTBACK;
2970 return FALSE;
a0d0e21e 2971 }
57843af0 2972 CopLINE_set(&PL_compiling, 0);
c277df42 2973 if (startop) {
3280af22 2974 *startop = PL_eval_root;
c277df42 2975 } else
3280af22 2976 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
2977
2978 /* Set the context for this new optree.
2979 * If the last op is an OP_REQUIRE, force scalar context.
2980 * Otherwise, propagate the context from the eval(). */
2981 if (PL_eval_root->op_type == OP_LEAVEEVAL
2982 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
2983 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
2984 == OP_REQUIRE)
2985 scalar(PL_eval_root);
2986 else if (gimme & G_VOID)
3280af22 2987 scalarvoid(PL_eval_root);
54310121 2988 else if (gimme & G_ARRAY)
3280af22 2989 list(PL_eval_root);
a0d0e21e 2990 else
3280af22 2991 scalar(PL_eval_root);
a0d0e21e
LW
2992
2993 DEBUG_x(dump_eval());
2994
55497cff 2995 /* Register with debugger: */
6482a30d 2996 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 2997 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP
2998 if (cv) {
2999 dSP;
924508f0 3000 PUSHMARK(SP);
cc49e20b 3001 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 3002 PUTBACK;
864dbfa3 3003 call_sv((SV*)cv, G_DISCARD);
55497cff
PP
3004 }
3005 }
3006
3c10abe3
AG
3007 if (PL_unitcheckav)
3008 call_list(PL_scopestack_ix, PL_unitcheckav);
3009
a0d0e21e
LW
3010 /* compiled okay, so do it */
3011
3280af22
NIS
3012 CvDEPTH(PL_compcv) = 1;
3013 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3014 PL_op = saveop; /* The caller may need it. */
bc177e6b 3015 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3016
410be5db
DM
3017 PUTBACK;
3018 return TRUE;
a0d0e21e
LW
3019}
3020
a6c40364 3021STATIC PerlIO *
74d5ed12 3022S_check_type_and_open(pTHX_ const char *name, const char *mode)
ce8abf5f
SP
3023{
3024 Stat_t st;
c445ea15 3025 const int st_rc = PerlLIO_stat(name, &st);
df528165 3026
6b845e56 3027 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3028 return NULL;
ce8abf5f
SP
3029 }
3030
ce8abf5f
SP
3031 return PerlIO_open(name, mode);
3032}
3033
3034STATIC PerlIO *
7925835c 3035S_doopen_pm(pTHX_ const char *name, const char *mode)
b295d113 3036{
7925835c 3037#ifndef PERL_DISABLE_PMC
f54cb97a 3038 const STRLEN namelen = strlen(name);
b295d113
TH
3039 PerlIO *fp;
3040
7894fbab 3041 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
9d4ba2ae 3042 SV * const pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
349d4f2f 3043 const char * const pmc = SvPV_nolen_const(pmcsv);
a6c40364
GS
3044 Stat_t pmcstat;
3045 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
85e8f315 3046 fp = check_type_and_open(name, mode);
a6c40364
GS
3047 }
3048 else {
a91233bf 3049 fp = check_type_and_open(pmc, mode);
b295d113 3050 }
a6c40364
GS
3051 SvREFCNT_dec(pmcsv);
3052 }
3053 else {
85e8f315 3054 fp = check_type_and_open(name, mode);
b295d113 3055 }
b295d113 3056 return fp;
7925835c 3057#else
85e8f315 3058 return check_type_and_open(name, mode);
7925835c 3059#endif /* !PERL_DISABLE_PMC */
b295d113
TH
3060}
3061
a0d0e21e
LW
3062PP(pp_require)
3063{
27da23d5 3064 dVAR; dSP;
c09156bb 3065 register PERL_CONTEXT *cx;
a0d0e21e 3066 SV *sv;
5c144d81 3067 const char *name;
6132ea6c 3068 STRLEN len;
4492be7a
JM
3069 char * unixname;
3070 STRLEN unixlen;
62f5ad7a 3071#ifdef VMS
4492be7a 3072 int vms_unixname = 0;
62f5ad7a 3073#endif
c445ea15
AL
3074 const char *tryname = NULL;
3075 SV *namesv = NULL;
f54cb97a 3076 const I32 gimme = GIMME_V;
bbed91b5 3077 int filter_has_file = 0;
c445ea15 3078 PerlIO *tryrsfp = NULL;
34113e50 3079 SV *filter_cache = NULL;
c445ea15
AL
3080 SV *filter_state = NULL;
3081 SV *filter_sub = NULL;
3082 SV *hook_sv = NULL;
6ec9efec
JH
3083 SV *encoding;
3084 OP *op;
a0d0e21e
LW
3085
3086 sv = POPs;
d7aa5382
JP
3087 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
3088 if ( SvVOK(sv) && ckWARN(WARN_PORTABLE) ) /* require v5.6.1 */
9014280d 3089 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
e3407aba 3090 "v-string in use/require non-portable");
d7aa5382
JP
3091
3092 sv = new_version(sv);
3093 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3094 upg_version(PL_patchlevel, TRUE);
149c1637 3095 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3096 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3097 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3098 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3099 }
3100 else {
3101 if ( vcmp(sv,PL_patchlevel) > 0 )
3102 DIE(aTHX_ "Perl %"SVf" required--this is only %"SVf", stopped",
be2597df 3103 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647 3104 }
d7aa5382 3105
7dfde25d
RGS
3106 /* If we request a version >= 5.9.5, load feature.pm with the
3107 * feature bundle that corresponds to the required version.
3108 * We do this only with use, not require. */
ac0e6a2f 3109 if (PL_compcv && vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3110 SV *const importsv = vnormal(sv);
3111 *SvPVX_mutable(importsv) = ':';
3112 ENTER;
3113 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3114 LEAVE;
3115 }
3116
3117 RETPUSHYES;
a0d0e21e 3118 }
5c144d81 3119 name = SvPV_const(sv, len);
6132ea6c 3120 if (!(name && len > 0 && *name))
cea2e8a9 3121 DIE(aTHX_ "Null filename used");
4633a7c4 3122 TAINT_PROPER("require");
4492be7a
JM
3123
3124
3125#ifdef VMS
3126 /* The key in the %ENV hash is in the syntax of file passed as the argument
3127 * usually this is in UNIX format, but sometimes in VMS format, which
3128 * can result in a module being pulled in more than once.
3129 * To prevent this, the key must be stored in UNIX format if the VMS
3130 * name can be translated to UNIX.
3131 */
3132 if ((unixname = tounixspec(name, NULL)) != NULL) {
3133 unixlen = strlen(unixname);
3134 vms_unixname = 1;
3135 }
3136 else
3137#endif
3138 {
3139 /* if not VMS or VMS name can not be translated to UNIX, pass it
3140 * through.
3141 */
3142 unixname = (char *) name;
3143 unixlen = len;
3144 }
44f8325f 3145 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM
3146 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3147 unixname, unixlen, 0);
44f8325f
AL
3148 if ( svp ) {
3149 if (*svp != &PL_sv_undef)
3150 RETPUSHYES;
3151 else
3152 DIE(aTHX_ "Compilation failed in require");
3153 }
4d8b06f1 3154 }
a0d0e21e
LW
3155
3156 /* prepare to compile file */
3157
be4b629d 3158 if (path_is_absolute(name)) {
46fc3d4c 3159 tryname = name;
7925835c 3160 tryrsfp = doopen_pm(name,PERL_SCRIPT_MODE);
bf4acbe4 3161 }
67627c52
JH
3162#ifdef MACOS_TRADITIONAL
3163 if (!tryrsfp) {
3164 char newname[256];
3165
3166 MacPerl_CanonDir(name, newname, 1);
3167 if (path_is_absolute(newname)) {
3168 tryname = newname;
7925835c 3169 tryrsfp = doopen_pm(newname,PERL_SCRIPT_MODE);
67627c52
JH
3170 }
3171 }
3172#endif
be4b629d 3173 if (!tryrsfp) {
44f8325f 3174 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3175 I32 i;
748a9306 3176#ifdef VMS
4492be7a 3177 if (vms_unixname)
46fc3d4c
PP
3178#endif
3179 {
561b68a9 3180 namesv = newSV(0);
46fc3d4c 3181 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3182 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3183
c38a6530
RD
3184 if (SvTIED_mg((SV*)ar, PERL_MAGIC_tied))
3185 mg_get(dirsv);
bbed91b5
KF
3186 if (SvROK(dirsv)) {
3187 int count;
a3b58a99 3188 SV **svp;
bbed91b5
KF
3189 SV *loader = dirsv;
3190
e14e2dc8
NC
3191 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3192 && !sv_isobject(loader))
3193 {
bbed91b5
KF
3194 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3195 }
3196
b900a521 3197 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3198 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3199 tryname = SvPVX_const(namesv);
c445ea15 3200 tryrsfp = NULL;
bbed91b5
KF
3201
3202 ENTER;
3203 SAVETMPS;
3204 EXTEND(SP, 2);
3205
3206 PUSHMARK(SP);
3207 PUSHs(dirsv);
3208 PUSHs(sv);
3209 PUTBACK;
e982885c
NC
3210 if (sv_isobject(loader))
3211 count = call_method("INC", G_ARRAY);
3212 else
3213 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3214 SPAGAIN;
3215
a3b58a99
RGS
3216 /* Adjust file name if the hook has set an %INC entry */
3217 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3218 if (svp)
3219 tryname = SvPVX_const(*svp);
3220
bbed91b5
KF
3221 if (count > 0) {
3222 int i = 0;
3223 SV *arg;
3224
3225 SP -= count - 1;
3226 arg = SP[i++];
3227
34113e50
NC
3228 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3229 && !isGV_with_GP(SvRV(arg))) {
3230 filter_cache = SvRV(arg);
74c765eb 3231 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3232
3233 if (i < count) {
3234 arg = SP[i++];
3235 }
3236 }
3237
bbed91b5
KF
3238 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3239 arg = SvRV(arg);
3240 }
3241
3242 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3243 IO * const io = GvIO((GV *)arg);
bbed91b5
KF
3244
3245 ++filter_has_file;
3246
3247 if (io) {
3248 tryrsfp = IoIFP(io);
0f7de14d
NC
3249 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3250 PerlIO_close(IoOFP(io));
bbed91b5 3251 }
0f7de14d
NC
3252 IoIFP(io) = NULL;
3253 IoOFP(io) = NULL;
bbed91b5
KF
3254 }
3255
3256 if (i < count) {
3257 arg = SP[i++];
3258 }
3259 }
3260
3261 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3262 filter_sub = arg;
74c765eb 3263 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF
3264
3265 if (i < count) {
3266 filter_state = SP[i];
b37c2d43 3267 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3268 }
34113e50 3269 }
bbed91b5 3270
34113e50
NC
3271 if (!tryrsfp && (filter_cache || filter_sub)) {
3272 tryrsfp = PerlIO_open(BIT_BUCKET,
3273 PERL_SCRIPT_MODE);
bbed91b5 3274 }
1d06aecd 3275 SP--;
bbed91b5
KF
3276 }
3277
3278 PUTBACK;
3279 FREETMPS;
3280 LEAVE;
3281
3282 if (tryrsfp) {
89ccab8c 3283 hook_sv = dirsv;
bbed91b5
KF
3284 break;
3285 }
3286
3287 filter_has_file = 0;
34113e50
NC
3288 if (filter_cache) {
3289 SvREFCNT_dec(filter_cache);
3290 filter_cache = NULL;
3291 }
bbed91b5
KF
3292 if (filter_state) {
3293 SvREFCNT_dec(filter_state);
c445ea15 3294 filter_state = NULL;
bbed91b5
KF
3295 }
3296 if (filter_sub) {
3297 SvREFCNT_dec(filter_sub);
c445ea15 3298 filter_sub = NULL;
bbed91b5
KF
3299 }
3300 }
3301 else {
be4b629d
CN
3302 if (!path_is_absolute(name)
3303#ifdef MACOS_TRADITIONAL
3304 /* We consider paths of the form :a:b ambiguous and interpret them first
3305 as global then as local
3306 */
3307 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3308#endif
3309 ) {
089d5d59 3310 const char *dir = SvOK(dirsv) ? SvPV_nolen_const(dirsv) : "";
bf4acbe4 3311#ifdef MACOS_TRADITIONAL
67627c52
JH
3312 char buf1[256];
3313 char buf2[256];
3314
3315 MacPerl_CanonDir(name, buf2, 1);
3316 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3317#else
27da23d5 3318# ifdef VMS
bbed91b5 3319 char *unixdir;
c445ea15 3320 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF
3321 continue;
3322 sv_setpv(namesv, unixdir);
3323 sv_catpv(namesv, unixname);
27da23d5 3324# else
a0fd4948 3325# ifdef __SYMBIAN32__
27da23d5
JH
3326 if (PL_origfilename[0] &&
3327 PL_origfilename[1] == ':' &&
3328 !(dir[0] && dir[1] == ':'))
3329 Perl_sv_setpvf(aTHX_ namesv,
3330 "%c:%s\\%s",
3331 PL_origfilename[0],
3332 dir, name);
3333 else
3334 Perl_sv_setpvf(aTHX_ namesv,
3335 "%s\\%s",
3336 dir, name);
3337# else
bbed91b5 3338 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
27da23d5
JH
3339# endif
3340# endif
bf4acbe4 3341#endif
bbed91b5 3342 TAINT_PROPER("require");
349d4f2f 3343 tryname = SvPVX_const(namesv);
7925835c 3344 tryrsfp = doopen_pm(tryname, PERL_SCRIPT_MODE);
bbed91b5
KF
3345 if (tryrsfp) {
3346 if (tryname[0] == '.' && tryname[1] == '/')
3347 tryname += 2;
3348 break;
3349 }
ff806af2
DM
3350 else if (errno == EMFILE)
3351 /* no point in trying other paths if out of handles */
3352 break;
be4b629d 3353 }
46fc3d4c 3354 }
a0d0e21e
LW
3355 }
3356 }
3357 }
f4dd75d9 3358 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3359 CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
46fc3d4c 3360 SvREFCNT_dec(namesv);
a0d0e21e 3361 if (!tryrsfp) {
533c011a 3362 if (PL_op->op_type == OP_REQUIRE) {
5c144d81 3363 const char *msgstr = name;
e31de809 3364 if(errno == EMFILE) {
b9b739dc
NC
3365 SV * const msg
3366 = sv_2mortal(Perl_newSVpvf(aTHX_ "%s: %s", msgstr,
3367 Strerror(errno)));
349d4f2f 3368 msgstr = SvPV_nolen_const(msg);
e31de809
SP
3369 } else {
3370 if (namesv) { /* did we lookup @INC? */
44f8325f 3371 AV * const ar = GvAVn(PL_incgv);
e31de809 3372 I32 i;
b8f04b1b
NC
3373 SV * const msg = sv_2mortal(Perl_newSVpvf(aTHX_
3374 "%s in @INC%s%s (@INC contains:",
3375 msgstr,
3376 (instr(msgstr, ".h ")
3377 ? " (change .h to .ph maybe?)" : ""),
3378 (instr(msgstr, ".ph ")
3379 ? " (did you run h2ph?)" : "")
3380 ));
3381
e31de809 3382 for (i = 0; i <= AvFILL(ar); i++) {
396482e1 3383 sv_catpvs(msg, " ");
b8f04b1b 3384 sv_catsv(msg, *av_fetch(ar, i, TRUE));
e31de809 3385 }
396482e1 3386 sv_catpvs(msg, ")");
e31de809
SP
3387 msgstr = SvPV_nolen_const(msg);
3388 }
2683423c 3389 }
ea071790 3390 DIE(aTHX_ "Can't locate %s", msgstr);
a0d0e21e
LW
3391 }
3392
3393 RETPUSHUNDEF;
3394 }
d8bfb8bd 3395 else
93189314 3396 SETERRNO(0, SS_NORMAL);
a0d0e21e
LW
3397
3398 /* Assume success here to prevent recursive requirement. */
238d24b4 3399 /* name is never assigned to again, so len is still strlen(name) */
d3a4e64e 3400 /* Check whether a hook in @INC has already filled %INC */
44f8325f 3401 if (!hook_sv) {
4492be7a
JM
3402 (void)hv_store(GvHVn(PL_incgv),
3403 unixname, unixlen, newSVpv(CopFILE(&PL_compiling),0),0);
44f8325f 3404 } else {
4492be7a 3405 SV** const svp = hv_fetch(GvHVn(PL_incgv), unixname, unixlen, 0);
44f8325f 3406 if (!svp)
4492be7a
JM
3407 (void)hv_store(GvHVn(PL_incgv),
3408 unixname, unixlen, SvREFCNT_inc_simple(hook_sv), 0 );
d3a4e64e 3409 }