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move PL_lex_state into the PL_parser struct
[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));
5a844595
GS
1462 ++PL_error_count;
1463}
1464
a0d0e21e 1465OP *
35a4481c 1466Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1467{
27da23d5 1468 dVAR;
87582a92 1469
3280af22 1470 if (PL_in_eval) {
a0d0e21e 1471 I32 cxix;
a0d0e21e 1472 I32 gimme;
a0d0e21e 1473
4e6ea2c3 1474 if (message) {
faef0170 1475 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1476 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1477 SV * const err = ERRSV;
c445ea15 1478 const char *e = NULL;
98eae8f5 1479 if (!SvPOK(err))
c69006e4 1480 sv_setpvn(err,"",0);
98eae8f5 1481 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1482 STRLEN len;
349d4f2f 1483 e = SvPV_const(err, len);
0510663f 1484 e += len - msglen;
98eae8f5 1485 if (*e != *message || strNE(e,message))
c445ea15 1486 e = NULL;
98eae8f5
GS
1487 }
1488 if (!e) {
1489 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1490 sv_catpvn(err, prefix, sizeof(prefix)-1);
1491 sv_catpvn(err, message, msglen);
e476b1b5 1492 if (ckWARN(WARN_MISC)) {
504618e9 1493 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1494 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1495 }
4633a7c4 1496 }
4633a7c4 1497 }
1aa99e6b 1498 else {
06bf62c7 1499 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1500 }
4633a7c4 1501 }
4e6ea2c3 1502
5a844595
GS
1503 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1504 && PL_curstackinfo->si_prev)
1505 {
bac4b2ad 1506 dounwind(-1);
d3acc0f7 1507 POPSTACK;
bac4b2ad 1508 }
e336de0d 1509
a0d0e21e
LW
1510 if (cxix >= 0) {
1511 I32 optype;
35a4481c 1512 register PERL_CONTEXT *cx;
901017d6 1513 SV **newsp;
a0d0e21e
LW
1514
1515 if (cxix < cxstack_ix)
1516 dounwind(cxix);
1517
3280af22 1518 POPBLOCK(cx,PL_curpm);
6b35e009 1519 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1520 if (!message)
349d4f2f 1521 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1522 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1523 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1524 my_exit(1);
1525 }
1526 POPEVAL(cx);
1527
1528 if (gimme == G_SCALAR)
3280af22
NIS
1529 *++newsp = &PL_sv_undef;
1530 PL_stack_sp = newsp;
a0d0e21e
LW
1531
1532 LEAVE;
748a9306 1533
7fb6a879
GS
1534 /* LEAVE could clobber PL_curcop (see save_re_context())
1535 * XXX it might be better to find a way to avoid messing with
1536 * PL_curcop in save_re_context() instead, but this is a more
1537 * minimal fix --GSAR */
1538 PL_curcop = cx->blk_oldcop;
1539
7a2e2cd6 1540 if (optype == OP_REQUIRE) {
44f8325f 1541 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1542 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1543 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1544 &PL_sv_undef, 0);
5a844595
GS
1545 DIE(aTHX_ "%sCompilation failed in require",
1546 *msg ? msg : "Unknown error\n");
7a2e2cd6 1547 }
f39bc417
DM
1548 assert(CxTYPE(cx) == CXt_EVAL);
1549 return cx->blk_eval.retop;
a0d0e21e
LW
1550 }
1551 }
9cc2fdd3 1552 if (!message)
349d4f2f 1553 message = SvPVx_const(ERRSV, msglen);
87582a92 1554
7ff03255 1555 write_to_stderr(message, msglen);
f86702cc
PP
1556 my_failure_exit();
1557 /* NOTREACHED */
a0d0e21e
LW
1558 return 0;
1559}
1560
1561PP(pp_xor)
1562{
97aff369 1563 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1564 if (SvTRUE(left) != SvTRUE(right))
1565 RETSETYES;
1566 else
1567 RETSETNO;
1568}
1569
a0d0e21e
LW
1570PP(pp_caller)
1571{
97aff369 1572 dVAR;
39644a26 1573 dSP;
a0d0e21e 1574 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1575 register const PERL_CONTEXT *cx;
1576 register const PERL_CONTEXT *ccstack = cxstack;
1577 const PERL_SI *top_si = PL_curstackinfo;
54310121 1578 I32 gimme;
06b5626a 1579 const char *stashname;
a0d0e21e
LW
1580 I32 count = 0;
1581
1582 if (MAXARG)
1583 count = POPi;
27d41816 1584
a0d0e21e 1585 for (;;) {
2c375eb9
GS
1586 /* we may be in a higher stacklevel, so dig down deeper */
1587 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1588 top_si = top_si->si_prev;
1589 ccstack = top_si->si_cxstack;
1590 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1591 }
a0d0e21e 1592 if (cxix < 0) {
27d41816
DM
1593 if (GIMME != G_ARRAY) {
1594 EXTEND(SP, 1);
a0d0e21e 1595 RETPUSHUNDEF;
27d41816 1596 }
a0d0e21e
LW
1597 RETURN;
1598 }
f2a7f298 1599 /* caller() should not report the automatic calls to &DB::sub */
1600 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1601 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1602 count++;
1603 if (!count--)
1604 break;
2c375eb9 1605 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1606 }
2c375eb9
GS
1607
1608 cx = &ccstack[cxix];
7766f137 1609 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1610 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1611 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1612 field below is defined for any cx. */
f2a7f298 1613 /* caller() should not report the automatic calls to &DB::sub */
1614 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1615 cx = &ccstack[dbcxix];
06a5b730
PP
1616 }
1617
ed094faf 1618 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1619 if (GIMME != G_ARRAY) {
27d41816 1620 EXTEND(SP, 1);
ed094faf 1621 if (!stashname)
3280af22 1622 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1623 else {
1624 dTARGET;
ed094faf 1625 sv_setpv(TARG, stashname);
49d8d3a1
MB
1626 PUSHs(TARG);
1627 }
a0d0e21e
LW
1628 RETURN;
1629 }
a0d0e21e 1630
b3ca2e83 1631 EXTEND(SP, 11);
27d41816 1632
ed094faf 1633 if (!stashname)
3280af22 1634 PUSHs(&PL_sv_undef);
49d8d3a1 1635 else
ed094faf 1636 PUSHs(sv_2mortal(newSVpv(stashname, 0)));
248c2a4d 1637 PUSHs(sv_2mortal(newSVpv(OutCopFILE(cx->blk_oldcop), 0)));
57843af0 1638 PUSHs(sv_2mortal(newSViv((I32)CopLINE(cx->blk_oldcop))));
a0d0e21e
LW
1639 if (!MAXARG)
1640 RETURN;
7766f137 1641 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1642 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1643 /* So is ccstack[dbcxix]. */
07b8c804 1644 if (isGV(cvgv)) {
561b68a9 1645 SV * const sv = newSV(0);
c445ea15 1646 gv_efullname3(sv, cvgv, NULL);
07b8c804 1647 PUSHs(sv_2mortal(sv));
cc8d50a7 1648 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804
RGS
1649 }
1650 else {
396482e1 1651 PUSHs(sv_2mortal(newSVpvs("(unknown)")));
cc8d50a7 1652 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804 1653 }
a0d0e21e
LW
1654 }
1655 else {
396482e1 1656 PUSHs(sv_2mortal(newSVpvs("(eval)")));
a0d0e21e
LW
1657 PUSHs(sv_2mortal(newSViv(0)));
1658 }
54310121
PP
1659 gimme = (I32)cx->blk_gimme;
1660 if (gimme == G_VOID)
3280af22 1661 PUSHs(&PL_sv_undef);
54310121
PP
1662 else
1663 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
6b35e009 1664 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1665 /* eval STRING */
06a5b730 1666 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1667 PUSHs(cx->blk_eval.cur_text);
3280af22 1668 PUSHs(&PL_sv_no);
0f79a09d 1669 }
811a4de9 1670 /* require */
0f79a09d
GS
1671 else if (cx->blk_eval.old_namesv) {
1672 PUSHs(sv_2mortal(newSVsv(cx->blk_eval.old_namesv)));
3280af22 1673 PUSHs(&PL_sv_yes);
06a5b730 1674 }
811a4de9
GS
1675 /* eval BLOCK (try blocks have old_namesv == 0) */
1676 else {
1677 PUSHs(&PL_sv_undef);
1678 PUSHs(&PL_sv_undef);
1679 }
4633a7c4 1680 }
a682de96
GS
1681 else {
1682 PUSHs(&PL_sv_undef);
1683 PUSHs(&PL_sv_undef);
1684 }
cc8d50a7 1685 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
ed094faf 1686 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1687 {
66a1b24b
AL
1688 AV * const ary = cx->blk_sub.argarray;
1689 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1690
3280af22 1691 if (!PL_dbargs) {
71315bf2 1692 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1693 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1694 GvMULTI_on(tmpgv);
3ddcf04c 1695 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1696 }
1697
3280af22
NIS
1698 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1699 av_extend(PL_dbargs, AvFILLp(ary) + off);
1700 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1701 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1702 }
f3aa04c2
GS
1703 /* XXX only hints propagated via op_private are currently
1704 * visible (others are not easily accessible, since they
1705 * use the global PL_hints) */
623e6609 1706 PUSHs(sv_2mortal(newSViv(CopHINTS_get(cx->blk_oldcop))));
e476b1b5
GS
1707 {
1708 SV * mask ;
72dc9ed5 1709 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1710
ac27b0f5 1711 if (old_warnings == pWARN_NONE ||
114bafba 1712 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1713 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1714 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1715 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1716 /* Get the bit mask for $warnings::Bits{all}, because
1717 * it could have been extended by warnings::register */
1718 SV **bits_all;
0bd48802 1719 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1720 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1721 mask = newSVsv(*bits_all);
1722 }
1723 else {
1724 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1725 }
1726 }
e476b1b5 1727 else
72dc9ed5 1728 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
e476b1b5
GS
1729 PUSHs(sv_2mortal(mask));
1730 }
b3ca2e83 1731
c28fe1ec 1732 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1733 sv_2mortal(newRV_noinc(
c28fe1ec
NC
1734 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1735 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1736 : &PL_sv_undef);
a0d0e21e
LW
1737 RETURN;
1738}
1739
a0d0e21e
LW
1740PP(pp_reset)
1741{
97aff369 1742 dVAR;
39644a26 1743 dSP;
10edeb5d 1744 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1745 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1746 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1747 RETURN;
1748}
1749
dd2155a4
DM
1750/* like pp_nextstate, but used instead when the debugger is active */
1751
a0d0e21e
LW
1752PP(pp_dbstate)
1753{
27da23d5 1754 dVAR;
533c011a 1755 PL_curcop = (COP*)PL_op;
a0d0e21e 1756 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1757 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1758 FREETMPS;
1759
5df8de69
DM
1760 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1761 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1762 {
39644a26 1763 dSP;
c09156bb 1764 register PERL_CONTEXT *cx;
f54cb97a 1765 const I32 gimme = G_ARRAY;
eb160463 1766 U8 hasargs;
0bd48802
AL
1767 GV * const gv = PL_DBgv;
1768 register CV * const cv = GvCV(gv);
a0d0e21e 1769
a0d0e21e 1770 if (!cv)
cea2e8a9 1771 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1772
aea4f609
DM
1773 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1774 /* don't do recursive DB::DB call */
a0d0e21e 1775 return NORMAL;
748a9306 1776
4633a7c4
LW
1777 ENTER;
1778 SAVETMPS;
1779
3280af22 1780 SAVEI32(PL_debug);
55497cff 1781 SAVESTACK_POS();
3280af22 1782 PL_debug = 0;
748a9306 1783 hasargs = 0;
924508f0 1784 SPAGAIN;
748a9306 1785
aed2304a 1786 if (CvISXSUB(cv)) {
c127bd3a
SF
1787 CvDEPTH(cv)++;
1788 PUSHMARK(SP);
1789 (void)(*CvXSUB(cv))(aTHX_ cv);
1790 CvDEPTH(cv)--;
1791 FREETMPS;
1792 LEAVE;
1793 return NORMAL;
1794 }
1795 else {
1796 PUSHBLOCK(cx, CXt_SUB, SP);
1797 PUSHSUB_DB(cx);
1798 cx->blk_sub.retop = PL_op->op_next;
1799 CvDEPTH(cv)++;
1800 SAVECOMPPAD();
1801 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1802 RETURNOP(CvSTART(cv));
1803 }
a0d0e21e
LW
1804 }
1805 else
1806 return NORMAL;
1807}
1808
a0d0e21e
LW
1809PP(pp_enteriter)
1810{
27da23d5 1811 dVAR; dSP; dMARK;
c09156bb 1812 register PERL_CONTEXT *cx;
f54cb97a 1813 const I32 gimme = GIMME_V;
a0d0e21e 1814 SV **svp;
df43650b 1815 U16 cxtype = CXt_LOOP | CXp_FOREACH;
7766f137
GS
1816#ifdef USE_ITHREADS
1817 void *iterdata;
1818#endif
a0d0e21e 1819
4633a7c4
LW
1820 ENTER;
1821 SAVETMPS;
1822
533c011a 1823 if (PL_op->op_targ) {
14f338dc
DM
1824 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1825 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1826 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1827 SVs_PADSTALE, SVs_PADSTALE);
1828 }
c3564e5c 1829#ifndef USE_ITHREADS
dd2155a4 1830 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
54b9620d 1831 SAVESPTR(*svp);
c3564e5c
GS
1832#else
1833 SAVEPADSV(PL_op->op_targ);
cbfa9890 1834 iterdata = INT2PTR(void*, PL_op->op_targ);
7766f137
GS
1835 cxtype |= CXp_PADVAR;
1836#endif
54b9620d
MB
1837 }
1838 else {
0bd48802 1839 GV * const gv = (GV*)POPs;
7766f137 1840 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1841 SAVEGENERICSV(*svp);
561b68a9 1842 *svp = newSV(0);
7766f137
GS
1843#ifdef USE_ITHREADS
1844 iterdata = (void*)gv;
1845#endif
54b9620d 1846 }
4633a7c4 1847
0d863452
RH
1848 if (PL_op->op_private & OPpITER_DEF)
1849 cxtype |= CXp_FOR_DEF;
1850
a0d0e21e
LW
1851 ENTER;
1852
7766f137
GS
1853 PUSHBLOCK(cx, cxtype, SP);
1854#ifdef USE_ITHREADS
1855 PUSHLOOP(cx, iterdata, MARK);
1856#else
a0d0e21e 1857 PUSHLOOP(cx, svp, MARK);
7766f137 1858#endif
533c011a 1859 if (PL_op->op_flags & OPf_STACKED) {
44a8e56a 1860 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
89ea2908
GA
1861 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1862 dPOPss;
0bd48802 1863 SV * const right = (SV*)cx->blk_loop.iterary;
984a4bea
RD
1864 SvGETMAGIC(sv);
1865 SvGETMAGIC(right);
4fe3f0fa
MHM
1866 if (RANGE_IS_NUMERIC(sv,right)) {
1867 if ((SvOK(sv) && SvNV(sv) < IV_MIN) ||
1868 (SvOK(right) && SvNV(right) >= IV_MAX))
076d9a11
MHM
1869 DIE(aTHX_ "Range iterator outside integer range");
1870 cx->blk_loop.iterix = SvIV(sv);
4fe3f0fa 1871 cx->blk_loop.itermax = SvIV(right);
d4665a05
DM
1872#ifdef DEBUGGING
1873 /* for correct -Dstv display */
1874 cx->blk_oldsp = sp - PL_stack_base;
1875#endif
89ea2908 1876 }
3f63a782 1877 else {
89ea2908 1878 cx->blk_loop.iterlval = newSVsv(sv);
13c5b33c 1879 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
10516c54 1880 (void) SvPV_nolen_const(right);
3f63a782 1881 }
89ea2908 1882 }
ef3e5ea9 1883 else if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1884 cx->blk_loop.itermax = 0;
1885 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary) + 1;
ef3e5ea9
NC
1886
1887 }
89ea2908 1888 }
4633a7c4 1889 else {
3280af22
NIS
1890 cx->blk_loop.iterary = PL_curstack;
1891 AvFILLp(PL_curstack) = SP - PL_stack_base;
ef3e5ea9 1892 if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1893 cx->blk_loop.itermax = MARK - PL_stack_base + 1;
1894 cx->blk_loop.iterix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1895 }
1896 else {
1897 cx->blk_loop.iterix = MARK - PL_stack_base;
1898 }
4633a7c4 1899 }
a0d0e21e
LW
1900
1901 RETURN;
1902}
1903
1904PP(pp_enterloop)
1905{
27da23d5 1906 dVAR; dSP;
c09156bb 1907 register PERL_CONTEXT *cx;
f54cb97a 1908 const I32 gimme = GIMME_V;
a0d0e21e
LW
1909
1910 ENTER;
1911 SAVETMPS;
1912 ENTER;
1913
1914 PUSHBLOCK(cx, CXt_LOOP, SP);
1915 PUSHLOOP(cx, 0, SP);
1916
1917 RETURN;
1918}
1919
1920PP(pp_leaveloop)
1921{
27da23d5 1922 dVAR; dSP;
c09156bb 1923 register PERL_CONTEXT *cx;
a0d0e21e
LW
1924 I32 gimme;
1925 SV **newsp;
1926 PMOP *newpm;
1927 SV **mark;
1928
1929 POPBLOCK(cx,newpm);
3a1b2b9e 1930 assert(CxTYPE(cx) == CXt_LOOP);
4fdae800 1931 mark = newsp;
a8bba7fa 1932 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1933
a1f49e72 1934 TAINT_NOT;
54310121 1935 if (gimme == G_VOID)
6f207bd3 1936 NOOP;
54310121
PP
1937 else if (gimme == G_SCALAR) {
1938 if (mark < SP)
1939 *++newsp = sv_mortalcopy(*SP);
1940 else
3280af22 1941 *++newsp = &PL_sv_undef;
a0d0e21e
LW
1942 }
1943 else {
a1f49e72 1944 while (mark < SP) {
a0d0e21e 1945 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
1946 TAINT_NOT; /* Each item is independent */
1947 }
a0d0e21e 1948 }
f86702cc
PP
1949 SP = newsp;
1950 PUTBACK;
1951
a8bba7fa 1952 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 1953 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 1954
a0d0e21e
LW
1955 LEAVE;
1956 LEAVE;
1957
f86702cc 1958 return NORMAL;
a0d0e21e
LW
1959}
1960
1961PP(pp_return)
1962{
27da23d5 1963 dVAR; dSP; dMARK;
c09156bb 1964 register PERL_CONTEXT *cx;
f86702cc 1965 bool popsub2 = FALSE;
b45de488 1966 bool clear_errsv = FALSE;
a0d0e21e
LW
1967 I32 gimme;
1968 SV **newsp;
1969 PMOP *newpm;
1970 I32 optype = 0;
b0d9ce38 1971 SV *sv;
f39bc417 1972 OP *retop;
a0d0e21e 1973
0bd48802
AL
1974 const I32 cxix = dopoptosub(cxstack_ix);
1975
9850bf21
RH
1976 if (cxix < 0) {
1977 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
1978 * sort block, which is a CXt_NULL
1979 * not a CXt_SUB */
1980 dounwind(0);
d7507f74
RH
1981 PL_stack_base[1] = *PL_stack_sp;
1982 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
1983 return 0;
1984 }
9850bf21
RH
1985 else
1986 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 1987 }
a0d0e21e
LW
1988 if (cxix < cxstack_ix)
1989 dounwind(cxix);
1990
d7507f74
RH
1991 if (CxMULTICALL(&cxstack[cxix])) {
1992 gimme = cxstack[cxix].blk_gimme;
1993 if (gimme == G_VOID)
1994 PL_stack_sp = PL_stack_base;
1995 else if (gimme == G_SCALAR) {
1996 PL_stack_base[1] = *PL_stack_sp;
1997 PL_stack_sp = PL_stack_base + 1;
1998 }
9850bf21 1999 return 0;
d7507f74 2000 }
9850bf21 2001
a0d0e21e 2002 POPBLOCK(cx,newpm);
6b35e009 2003 switch (CxTYPE(cx)) {
a0d0e21e 2004 case CXt_SUB:
f86702cc 2005 popsub2 = TRUE;
f39bc417 2006 retop = cx->blk_sub.retop;
5dd42e15 2007 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2008 break;
2009 case CXt_EVAL:
b45de488
GS
2010 if (!(PL_in_eval & EVAL_KEEPERR))
2011 clear_errsv = TRUE;
a0d0e21e 2012 POPEVAL(cx);
f39bc417 2013 retop = cx->blk_eval.retop;
1d76a5c3
GS
2014 if (CxTRYBLOCK(cx))
2015 break;
067f92a0 2016 lex_end();
748a9306
LW
2017 if (optype == OP_REQUIRE &&
2018 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2019 {
54310121 2020 /* Unassume the success we assumed earlier. */
901017d6 2021 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2022 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2023 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2024 }
a0d0e21e 2025 break;
7766f137
GS
2026 case CXt_FORMAT:
2027 POPFORMAT(cx);
f39bc417 2028 retop = cx->blk_sub.retop;
7766f137 2029 break;
a0d0e21e 2030 default:
cea2e8a9 2031 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2032 }
2033
a1f49e72 2034 TAINT_NOT;
a0d0e21e 2035 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2036 if (MARK < SP) {
2037 if (popsub2) {
a8bba7fa 2038 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2039 if (SvTEMP(TOPs)) {
2040 *++newsp = SvREFCNT_inc(*SP);
2041 FREETMPS;
2042 sv_2mortal(*newsp);
959e3673
GS
2043 }
2044 else {
2045 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2046 FREETMPS;
959e3673
GS
2047 *++newsp = sv_mortalcopy(sv);
2048 SvREFCNT_dec(sv);
a29cdaf0 2049 }
959e3673
GS
2050 }
2051 else
a29cdaf0 2052 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2053 }
2054 else
a29cdaf0 2055 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2056 }
2057 else
3280af22 2058 *++newsp = &PL_sv_undef;
a0d0e21e 2059 }
54310121 2060 else if (gimme == G_ARRAY) {
a1f49e72 2061 while (++MARK <= SP) {
f86702cc
PP
2062 *++newsp = (popsub2 && SvTEMP(*MARK))
2063 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2064 TAINT_NOT; /* Each item is independent */
2065 }
a0d0e21e 2066 }
3280af22 2067 PL_stack_sp = newsp;
a0d0e21e 2068
5dd42e15 2069 LEAVE;
f86702cc
PP
2070 /* Stack values are safe: */
2071 if (popsub2) {
5dd42e15 2072 cxstack_ix--;
b0d9ce38 2073 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2074 }
b0d9ce38 2075 else
c445ea15 2076 sv = NULL;
3280af22 2077 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2078
b0d9ce38 2079 LEAVESUB(sv);
b45de488 2080 if (clear_errsv)
c69006e4 2081 sv_setpvn(ERRSV,"",0);
f39bc417 2082 return retop;
a0d0e21e
LW
2083}
2084
2085PP(pp_last)
2086{
27da23d5 2087 dVAR; dSP;
a0d0e21e 2088 I32 cxix;
c09156bb 2089 register PERL_CONTEXT *cx;
f86702cc 2090 I32 pop2 = 0;
a0d0e21e 2091 I32 gimme;
8772537c 2092 I32 optype;
a0d0e21e
LW
2093 OP *nextop;
2094 SV **newsp;
2095 PMOP *newpm;
a8bba7fa 2096 SV **mark;
c445ea15 2097 SV *sv = NULL;
9d4ba2ae 2098
a0d0e21e 2099
533c011a 2100 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2101 cxix = dopoptoloop(cxstack_ix);
2102 if (cxix < 0)
a651a37d 2103 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2104 }
2105 else {
2106 cxix = dopoptolabel(cPVOP->op_pv);
2107 if (cxix < 0)
cea2e8a9 2108 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2109 }
2110 if (cxix < cxstack_ix)
2111 dounwind(cxix);
2112
2113 POPBLOCK(cx,newpm);
5dd42e15 2114 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2115 mark = newsp;
6b35e009 2116 switch (CxTYPE(cx)) {
a0d0e21e 2117 case CXt_LOOP:
f86702cc 2118 pop2 = CXt_LOOP;
a8bba7fa 2119 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2120 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2121 break;
f86702cc 2122 case CXt_SUB:
f86702cc 2123 pop2 = CXt_SUB;
f39bc417 2124 nextop = cx->blk_sub.retop;
a0d0e21e 2125 break;
f86702cc
PP
2126 case CXt_EVAL:
2127 POPEVAL(cx);
f39bc417 2128 nextop = cx->blk_eval.retop;
a0d0e21e 2129 break;
7766f137
GS
2130 case CXt_FORMAT:
2131 POPFORMAT(cx);
f39bc417 2132 nextop = cx->blk_sub.retop;
7766f137 2133 break;
a0d0e21e 2134 default:
cea2e8a9 2135 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2136 }
2137
a1f49e72 2138 TAINT_NOT;
a0d0e21e 2139 if (gimme == G_SCALAR) {
f86702cc
PP
2140 if (MARK < SP)
2141 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2142 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2143 else
3280af22 2144 *++newsp = &PL_sv_undef;
a0d0e21e 2145 }
54310121 2146 else if (gimme == G_ARRAY) {
a1f49e72 2147 while (++MARK <= SP) {
f86702cc
PP
2148 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2149 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2150 TAINT_NOT; /* Each item is independent */
2151 }
f86702cc
PP
2152 }
2153 SP = newsp;
2154 PUTBACK;
2155
5dd42e15
DM
2156 LEAVE;
2157 cxstack_ix--;
f86702cc
PP
2158 /* Stack values are safe: */
2159 switch (pop2) {
2160 case CXt_LOOP:
a8bba7fa 2161 POPLOOP(cx); /* release loop vars ... */
4fdae800 2162 LEAVE;
f86702cc
PP
2163 break;
2164 case CXt_SUB:
b0d9ce38 2165 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2166 break;
a0d0e21e 2167 }
3280af22 2168 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2169
b0d9ce38 2170 LEAVESUB(sv);
9d4ba2ae
AL
2171 PERL_UNUSED_VAR(optype);
2172 PERL_UNUSED_VAR(gimme);
f86702cc 2173 return nextop;
a0d0e21e
LW
2174}
2175
2176PP(pp_next)
2177{
27da23d5 2178 dVAR;
a0d0e21e 2179 I32 cxix;
c09156bb 2180 register PERL_CONTEXT *cx;
85538317 2181 I32 inner;
a0d0e21e 2182
533c011a 2183 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2184 cxix = dopoptoloop(cxstack_ix);
2185 if (cxix < 0)
a651a37d 2186 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2187 }
2188 else {
2189 cxix = dopoptolabel(cPVOP->op_pv);
2190 if (cxix < 0)
cea2e8a9 2191 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2192 }
2193 if (cxix < cxstack_ix)
2194 dounwind(cxix);
2195
85538317
GS
2196 /* clear off anything above the scope we're re-entering, but
2197 * save the rest until after a possible continue block */
2198 inner = PL_scopestack_ix;
1ba6ee2b 2199 TOPBLOCK(cx);
85538317
GS
2200 if (PL_scopestack_ix < inner)
2201 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2202 PL_curcop = cx->blk_oldcop;
022eaa24 2203 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2204}
2205
2206PP(pp_redo)
2207{
27da23d5 2208 dVAR;
a0d0e21e 2209 I32 cxix;
c09156bb 2210 register PERL_CONTEXT *cx;
a0d0e21e 2211 I32 oldsave;
a034e688 2212 OP* redo_op;
a0d0e21e 2213
533c011a 2214 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2215 cxix = dopoptoloop(cxstack_ix);
2216 if (cxix < 0)
a651a37d 2217 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2218 }
2219 else {
2220 cxix = dopoptolabel(cPVOP->op_pv);
2221 if (cxix < 0)
cea2e8a9 2222 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2223 }
2224 if (cxix < cxstack_ix)
2225 dounwind(cxix);
2226
022eaa24 2227 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2228 if (redo_op->op_type == OP_ENTER) {
2229 /* pop one less context to avoid $x being freed in while (my $x..) */
2230 cxstack_ix++;
2231 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2232 redo_op = redo_op->op_next;
2233 }
2234
a0d0e21e 2235 TOPBLOCK(cx);
3280af22 2236 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2237 LEAVE_SCOPE(oldsave);
936c78b5 2238 FREETMPS;
3a1b2b9e 2239 PL_curcop = cx->blk_oldcop;
a034e688 2240 return redo_op;
a0d0e21e
LW
2241}
2242
0824fdcb 2243STATIC OP *
bfed75c6 2244S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2245{
97aff369 2246 dVAR;
a0d0e21e 2247 OP **ops = opstack;
bfed75c6 2248 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2249
fc36a67e 2250 if (ops >= oplimit)
cea2e8a9 2251 Perl_croak(aTHX_ too_deep);
11343788
MB
2252 if (o->op_type == OP_LEAVE ||
2253 o->op_type == OP_SCOPE ||
2254 o->op_type == OP_LEAVELOOP ||
33d34e4c 2255 o->op_type == OP_LEAVESUB ||
11343788 2256 o->op_type == OP_LEAVETRY)
fc36a67e 2257 {
5dc0d613 2258 *ops++ = cUNOPo->op_first;
fc36a67e 2259 if (ops >= oplimit)
cea2e8a9 2260 Perl_croak(aTHX_ too_deep);
fc36a67e 2261 }
c4aa4e48 2262 *ops = 0;
11343788 2263 if (o->op_flags & OPf_KIDS) {
aec46f14 2264 OP *kid;
a0d0e21e 2265 /* First try all the kids at this level, since that's likeliest. */
11343788 2266 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS
2267 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2268 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW
2269 return kid;
2270 }
11343788 2271 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2272 if (kid == PL_lastgotoprobe)
a0d0e21e 2273 continue;
ed8d0fe2
SM
2274 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2275 if (ops == opstack)
2276 *ops++ = kid;
2277 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2278 ops[-1]->op_type == OP_DBSTATE)
2279 ops[-1] = kid;
2280 else
2281 *ops++ = kid;
2282 }
155aba94 2283 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2284 return o;
a0d0e21e
LW
2285 }
2286 }
c4aa4e48 2287 *ops = 0;
a0d0e21e
LW
2288 return 0;
2289}
2290
a0d0e21e
LW
2291PP(pp_goto)
2292{
27da23d5 2293 dVAR; dSP;
cbbf8932 2294 OP *retop = NULL;
a0d0e21e 2295 I32 ix;
c09156bb 2296 register PERL_CONTEXT *cx;
fc36a67e
PP
2297#define GOTO_DEPTH 64
2298 OP *enterops[GOTO_DEPTH];
cbbf8932 2299 const char *label = NULL;
bfed75c6
AL
2300 const bool do_dump = (PL_op->op_type == OP_DUMP);
2301 static const char must_have_label[] = "goto must have label";
a0d0e21e 2302
533c011a 2303 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2304 SV * const sv = POPs;
a0d0e21e
LW
2305
2306 /* This egregious kludge implements goto &subroutine */
2307 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2308 I32 cxix;
c09156bb 2309 register PERL_CONTEXT *cx;
a0d0e21e
LW
2310 CV* cv = (CV*)SvRV(sv);
2311 SV** mark;
2312 I32 items = 0;
2313 I32 oldsave;
b1464ded 2314 bool reified = 0;
a0d0e21e 2315
e8f7dd13 2316 retry:
4aa0a1f7 2317 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2318 const GV * const gv = CvGV(cv);
e8f7dd13 2319 if (gv) {
7fc63493 2320 GV *autogv;
e8f7dd13
GS
2321 SV *tmpstr;
2322 /* autoloaded stub? */
2323 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2324 goto retry;
2325 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2326 GvNAMELEN(gv), FALSE);
2327 if (autogv && (cv = GvCV(autogv)))
2328 goto retry;
2329 tmpstr = sv_newmortal();
c445ea15 2330 gv_efullname3(tmpstr, gv, NULL);
be2597df 2331 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2332 }
cea2e8a9 2333 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2334 }
2335
a0d0e21e 2336 /* First do some returnish stuff. */
b37c2d43 2337 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2338 FREETMPS;
a0d0e21e
LW
2339 cxix = dopoptosub(cxstack_ix);
2340 if (cxix < 0)
cea2e8a9 2341 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2342 if (cxix < cxstack_ix)
2343 dounwind(cxix);
2344 TOPBLOCK(cx);
2d43a17f 2345 SPAGAIN;
564abe23 2346 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2347 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2348 if (CxREALEVAL(cx))
2349 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2350 else
2351 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2352 }
9850bf21
RH
2353 else if (CxMULTICALL(cx))
2354 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
cc8d50a7 2355 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
d8b46c1b 2356 /* put @_ back onto stack */
a0d0e21e 2357 AV* av = cx->blk_sub.argarray;
bfed75c6 2358
93965878 2359 items = AvFILLp(av) + 1;
a45cdc79
DM
2360 EXTEND(SP, items+1); /* @_ could have been extended. */
2361 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2362 SvREFCNT_dec(GvAV(PL_defgv));
2363 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2364 CLEAR_ARGARRAY(av);
d8b46c1b 2365 /* abandon @_ if it got reified */
62b1ebc2 2366 if (AvREAL(av)) {
b1464ded
DM
2367 reified = 1;
2368 SvREFCNT_dec(av);
d8b46c1b
GS
2369 av = newAV();
2370 av_extend(av, items-1);
11ca45c0 2371 AvREIFY_only(av);
dd2155a4 2372 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2373 }
a0d0e21e 2374 }
aed2304a 2375 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2376 AV* const av = GvAV(PL_defgv);
1fa4e549 2377 items = AvFILLp(av) + 1;
a45cdc79
DM
2378 EXTEND(SP, items+1); /* @_ could have been extended. */
2379 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2380 }
a45cdc79
DM
2381 mark = SP;
2382 SP += items;
6b35e009 2383 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2384 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2385 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2386 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2387 LEAVE_SCOPE(oldsave);
2388
2389 /* Now do some callish stuff. */
2390 SAVETMPS;
5023d17a 2391 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2392 if (CvISXSUB(cv)) {
b37c2d43 2393 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2394 SV **newsp;
2395 I32 gimme;
b1464ded
DM
2396 if (reified) {
2397 I32 index;
2398 for (index=0; index<items; index++)
2399 sv_2mortal(SP[-index]);
2400 }
1fa4e549 2401
b37c2d43
AL
2402 /* XS subs don't have a CxSUB, so pop it */
2403 POPBLOCK(cx, PL_curpm);
2404 /* Push a mark for the start of arglist */
2405 PUSHMARK(mark);
2406 PUTBACK;
2407 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2408 LEAVE;
5eff7df7 2409 return retop;
a0d0e21e
LW
2410 }
2411 else {
b37c2d43 2412 AV* const padlist = CvPADLIST(cv);
6b35e009 2413 if (CxTYPE(cx) == CXt_EVAL) {
3280af22
NIS
2414 PL_in_eval = cx->blk_eval.old_in_eval;
2415 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2416 cx->cx_type = CXt_SUB;
cc8d50a7 2417 cx->blk_sub.hasargs = 0;
b150fb22 2418 }
a0d0e21e 2419 cx->blk_sub.cv = cv;
1a5b3db4 2420 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2421
a0d0e21e
LW
2422 CvDEPTH(cv)++;
2423 if (CvDEPTH(cv) < 2)
74c765eb 2424 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2425 else {
599cee73 2426 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
44a8e56a 2427 sub_crush_depth(cv);
26019298 2428 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2429 }
fd617465
DM
2430 SAVECOMPPAD();
2431 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
cc8d50a7 2432 if (cx->blk_sub.hasargs)
6d4ff0d2 2433 {
b37c2d43 2434 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2435
3280af22 2436 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2437 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2438 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2439 cx->blk_sub.argarray = av;
a0d0e21e
LW
2440
2441 if (items >= AvMAX(av) + 1) {
b37c2d43 2442 SV **ary = AvALLOC(av);
a0d0e21e
LW
2443 if (AvARRAY(av) != ary) {
2444 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2445 AvARRAY(av) = ary;
a0d0e21e
LW
2446 }
2447 if (items >= AvMAX(av) + 1) {
2448 AvMAX(av) = items - 1;
2449 Renew(ary,items+1,SV*);
2450 AvALLOC(av) = ary;
9c6bc640 2451 AvARRAY(av) = ary;
a0d0e21e
LW
2452 }
2453 }
a45cdc79 2454 ++mark;
a0d0e21e 2455 Copy(mark,AvARRAY(av),items,SV*);
93965878 2456 AvFILLp(av) = items - 1;
d8b46c1b 2457 assert(!AvREAL(av));
b1464ded
DM
2458 if (reified) {
2459 /* transfer 'ownership' of refcnts to new @_ */
2460 AvREAL_on(av);
2461 AvREIFY_off(av);
2462 }
a0d0e21e
LW
2463 while (items--) {
2464 if (*mark)
2465 SvTEMP_off(*mark);
2466 mark++;
2467 }
2468 }
491527d0 2469 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2470 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL
2471 if (PERLDB_GOTO) {
2472 CV * const gotocv = get_cv("DB::goto", FALSE);
2473 if (gotocv) {
2474 PUSHMARK( PL_stack_sp );
2475 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2476 PL_stack_sp--;
2477 }
491527d0 2478 }
1ce6579f 2479 }
a0d0e21e
LW
2480 RETURNOP(CvSTART(cv));
2481 }
2482 }
1614b0e3 2483 else {
0510663f 2484 label = SvPV_nolen_const(sv);
1614b0e3 2485 if (!(do_dump || *label))
cea2e8a9 2486 DIE(aTHX_ must_have_label);
1614b0e3 2487 }
a0d0e21e 2488 }
533c011a 2489 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2490 if (! do_dump)
cea2e8a9 2491 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2492 }
2493 else
2494 label = cPVOP->op_pv;
2495
2496 if (label && *label) {
cbbf8932 2497 OP *gotoprobe = NULL;
3b2447bc 2498 bool leaving_eval = FALSE;
33d34e4c 2499 bool in_block = FALSE;
cbbf8932 2500 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2501
2502 /* find label */
2503
d4c19fe8 2504 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2505 *enterops = 0;
2506 for (ix = cxstack_ix; ix >= 0; ix--) {
2507 cx = &cxstack[ix];
6b35e009 2508 switch (CxTYPE(cx)) {
a0d0e21e 2509 case CXt_EVAL:
3b2447bc 2510 leaving_eval = TRUE;
971ecbe6 2511 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2512 gotoprobe = (last_eval_cx ?
2513 last_eval_cx->blk_eval.old_eval_root :
2514 PL_eval_root);
2515 last_eval_cx = cx;
9c5794fe
RH
2516 break;
2517 }
2518 /* else fall through */
a0d0e21e
LW
2519 case CXt_LOOP:
2520 gotoprobe = cx->blk_oldcop->op_sibling;
2521 break;
2522 case CXt_SUBST:
2523 continue;
2524 case CXt_BLOCK:
33d34e4c 2525 if (ix) {
a0d0e21e 2526 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2527 in_block = TRUE;
2528 } else
3280af22 2529 gotoprobe = PL_main_root;
a0d0e21e 2530 break;
b3933176 2531 case CXt_SUB:
9850bf21 2532 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2533 gotoprobe = CvROOT(cx->blk_sub.cv);
2534 break;
2535 }
2536 /* FALL THROUGH */
7766f137 2537 case CXt_FORMAT:
0a753a76 2538 case CXt_NULL:
a651a37d 2539 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2540 default:
2541 if (ix)
cea2e8a9 2542 DIE(aTHX_ "panic: goto");
3280af22 2543 gotoprobe = PL_main_root;
a0d0e21e
LW
2544 break;
2545 }
2b597662
GS
2546 if (gotoprobe) {
2547 retop = dofindlabel(gotoprobe, label,
2548 enterops, enterops + GOTO_DEPTH);
2549 if (retop)
2550 break;
2551 }
3280af22 2552 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2553 }
2554 if (!retop)
cea2e8a9 2555 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2556
3b2447bc
RH
2557 /* if we're leaving an eval, check before we pop any frames
2558 that we're not going to punt, otherwise the error
2559 won't be caught */
2560
2561 if (leaving_eval && *enterops && enterops[1]) {
2562 I32 i;
2563 for (i = 1; enterops[i]; i++)
2564 if (enterops[i]->op_type == OP_ENTERITER)
2565 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2566 }
2567
a0d0e21e
LW
2568 /* pop unwanted frames */
2569
2570 if (ix < cxstack_ix) {
2571 I32 oldsave;
2572
2573 if (ix < 0)
2574 ix = 0;
2575 dounwind(ix);
2576 TOPBLOCK(cx);
3280af22 2577 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2578 LEAVE_SCOPE(oldsave);
2579 }
2580
2581 /* push wanted frames */
2582
748a9306 2583 if (*enterops && enterops[1]) {
0bd48802 2584 OP * const oldop = PL_op;
33d34e4c
AE
2585 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2586 for (; enterops[ix]; ix++) {
533c011a 2587 PL_op = enterops[ix];
84902520
TB
2588 /* Eventually we may want to stack the needed arguments
2589 * for each op. For now, we punt on the hard ones. */
533c011a 2590 if (PL_op->op_type == OP_ENTERITER)
894356b3 2591 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2592 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2593 }
533c011a 2594 PL_op = oldop;
a0d0e21e
LW
2595 }
2596 }
2597
2598 if (do_dump) {
a5f75d66 2599#ifdef VMS
6b88bc9c 2600 if (!retop) retop = PL_main_start;
a5f75d66 2601#endif
3280af22
NIS
2602 PL_restartop = retop;
2603 PL_do_undump = TRUE;
a0d0e21e
LW
2604
2605 my_unexec();
2606
3280af22
NIS
2607 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2608 PL_do_undump = FALSE;
a0d0e21e
LW
2609 }
2610
2611 RETURNOP(retop);
2612}
2613
2614PP(pp_exit)
2615{
97aff369 2616 dVAR;
39644a26 2617 dSP;
a0d0e21e
LW
2618 I32 anum;
2619
2620 if (MAXARG < 1)
2621 anum = 0;
ff0cee69 2622 else {
a0d0e21e 2623 anum = SvIVx(POPs);
d98f61e7
GS
2624#ifdef VMS
2625 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2626 anum = 0;
96e176bf 2627 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2628#endif
2629 }
cc3604b1 2630 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2631#ifdef PERL_MAD
2632 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2633 if (anum || !(PL_minus_c && PL_madskills))
2634 my_exit(anum);
2635#else
a0d0e21e 2636 my_exit(anum);
81d86705 2637#endif
3280af22 2638 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2639 RETURN;
2640}
2641
a0d0e21e
LW
2642/* Eval. */
2643
0824fdcb 2644STATIC void
cea2e8a9 2645S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2646{
504618e9 2647 const char *s = SvPVX_const(sv);
890ce7af 2648 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2649 I32 line = 1;
a0d0e21e
LW
2650
2651 while (s && s < send) {
f54cb97a 2652 const char *t;
b9f83d2f 2653 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2654
a0d0e21e
LW
2655 t = strchr(s, '\n');
2656 if (t)
2657 t++;
2658 else
2659 t = send;
2660
2661 sv_setpvn(tmpstr, s, t - s);
2662 av_store(array, line++, tmpstr);
2663 s = t;
2664 }
2665}
2666
901017d6 2667STATIC void
14dd3ad8
GS
2668S_docatch_body(pTHX)
2669{
97aff369 2670 dVAR;
cea2e8a9 2671 CALLRUNOPS(aTHX);
901017d6 2672 return;
312caa8e
CS
2673}
2674
0824fdcb 2675STATIC OP *
cea2e8a9 2676S_docatch(pTHX_ OP *o)
1e422769 2677{
97aff369 2678 dVAR;
6224f72b 2679 int ret;
06b5626a 2680 OP * const oldop = PL_op;
db36c5a1 2681 dJMPENV;
1e422769 2682
1e422769 2683#ifdef DEBUGGING
54310121 2684 assert(CATCH_GET == TRUE);
1e422769 2685#endif
312caa8e 2686 PL_op = o;
8bffa5f8 2687
14dd3ad8 2688 JMPENV_PUSH(ret);
6224f72b 2689 switch (ret) {
312caa8e 2690 case 0:
abd70938
DM
2691 assert(cxstack_ix >= 0);
2692 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2693 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8
GS
2694 redo_body:
2695 docatch_body();
312caa8e
CS
2696 break;
2697 case 3:
8bffa5f8 2698 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2699
2700 /* NB XXX we rely on the old popped CxEVAL still being at the top
2701 * of the stack; the way die_where() currently works, this
2702 * assumption is valid. In theory The cur_top_env value should be
2703 * returned in another global, the way retop (aka PL_restartop)
2704 * is. */
2705 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2706
2707 if (PL_restartop
2708 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2709 {
312caa8e
CS
2710 PL_op = PL_restartop;
2711 PL_restartop = 0;
2712 goto redo_body;
2713 }
2714 /* FALL THROUGH */
2715 default:
14dd3ad8 2716 JMPENV_POP;
533c011a 2717 PL_op = oldop;
6224f72b 2718 JMPENV_JUMP(ret);
1e422769 2719 /* NOTREACHED */
1e422769 2720 }
14dd3ad8 2721 JMPENV_POP;
533c011a 2722 PL_op = oldop;
5f66b61c 2723 return NULL;
1e422769
PP
2724}
2725
c277df42 2726OP *
bfed75c6 2727Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2728/* sv Text to convert to OP tree. */
2729/* startop op_free() this to undo. */
2730/* code Short string id of the caller. */
2731{
f7997f86 2732 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2733 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2734 PERL_CONTEXT *cx;
2735 SV **newsp;
b094c71d 2736 I32 gimme = G_VOID;
c277df42
IZ
2737 I32 optype;
2738 OP dummy;
155aba94 2739 OP *rop;
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;
2748 lex_start(sv);
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)
2797 rop = doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
2798 else
2799 rop = 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
c277df42
IZ
2817 return rop;
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.
2866 */
2867
0824fdcb 2868STATIC OP *
a3985cdc 2869S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2870{
27da23d5 2871 dVAR; dSP;
46c461b5 2872 OP * const saveop = PL_op;
a0d0e21e 2873
6dc8a9e4
IZ
2874 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2875 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2876 : EVAL_INEVAL);
a0d0e21e 2877
1ce6579f
PP
2878 PUSHMARK(SP);
2879
3280af22 2880 SAVESPTR(PL_compcv);
b9f83d2f 2881 PL_compcv = (CV*)newSV_type(SVt_PVCV);
1aff0e91 2882 CvEVAL_on(PL_compcv);
2090ab20
JH
2883 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2884 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2885
a3985cdc 2886 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2887 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2888
dd2155a4 2889 /* set up a scratch pad */
a0d0e21e 2890
dd2155a4 2891 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2892 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2893
07055b4c 2894
81d86705
NC
2895 if (!PL_madskills)
2896 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2897
a0d0e21e
LW
2898 /* make sure we compile in the right package */
2899
ed094faf 2900 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2901 SAVESPTR(PL_curstash);
ed094faf 2902 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2903 }
3c10abe3 2904 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
2905 SAVESPTR(PL_beginav);
2906 PL_beginav = newAV();
2907 SAVEFREESV(PL_beginav);
3c10abe3
AG
2908 SAVESPTR(PL_unitcheckav);
2909 PL_unitcheckav = newAV();
2910 SAVEFREESV(PL_unitcheckav);
22220620 2911 SAVEI8(PL_error_count);
a0d0e21e 2912
81d86705 2913#ifdef PERL_MAD
9da243ce 2914 SAVEBOOL(PL_madskills);
81d86705
NC
2915 PL_madskills = 0;
2916#endif
2917
a0d0e21e
LW
2918 /* try to compile it */
2919
5f66b61c 2920 PL_eval_root = NULL;
3280af22
NIS
2921 PL_error_count = 0;
2922 PL_curcop = &PL_compiling;
fc15ae8f 2923 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2924 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2925 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2926 else
c69006e4 2927 sv_setpvn(ERRSV,"",0);
3280af22 2928 if (yyparse() || PL_error_count || !PL_eval_root) {
0c58d367 2929 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2930 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2931 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2932 const char *msg;
bfed75c6 2933
533c011a 2934 PL_op = saveop;
3280af22
NIS
2935 if (PL_eval_root) {
2936 op_free(PL_eval_root);
5f66b61c 2937 PL_eval_root = NULL;
a0d0e21e 2938 }
3280af22 2939 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2940 if (!startop) {
3280af22 2941 POPBLOCK(cx,PL_curpm);
c277df42 2942 POPEVAL(cx);
c277df42 2943 }
a0d0e21e
LW
2944 lex_end();
2945 LEAVE;
9d4ba2ae
AL
2946
2947 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 2948 if (optype == OP_REQUIRE) {
b464bac0 2949 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 2950 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 2951 &PL_sv_undef, 0);
5a844595
GS
2952 DIE(aTHX_ "%sCompilation failed in require",
2953 *msg ? msg : "Unknown error\n");
2954 }
2955 else if (startop) {
3280af22 2956 POPBLOCK(cx,PL_curpm);
c277df42 2957 POPEVAL(cx);
5a844595
GS
2958 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2959 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 2960 }
9d7f88dd 2961 else {
9d7f88dd 2962 if (!*msg) {
6502358f 2963 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
2964 }
2965 }
9d4ba2ae 2966 PERL_UNUSED_VAR(newsp);
a0d0e21e
LW
2967 RETPUSHUNDEF;
2968 }
57843af0 2969 CopLINE_set(&PL_compiling, 0);
c277df42 2970 if (startop) {
3280af22 2971 *startop = PL_eval_root;
c277df42 2972 } else
3280af22 2973 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
2974
2975 /* Set the context for this new optree.
2976 * If the last op is an OP_REQUIRE, force scalar context.
2977 * Otherwise, propagate the context from the eval(). */
2978 if (PL_eval_root->op_type == OP_LEAVEEVAL
2979 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
2980 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
2981 == OP_REQUIRE)
2982 scalar(PL_eval_root);
2983 else if (gimme & G_VOID)
3280af22 2984 scalarvoid(PL_eval_root);
54310121 2985 else if (gimme & G_ARRAY)
3280af22 2986 list(PL_eval_root);
a0d0e21e 2987 else
3280af22 2988 scalar(PL_eval_root);
a0d0e21e
LW
2989
2990 DEBUG_x(dump_eval());
2991
55497cff 2992 /* Register with debugger: */
6482a30d 2993 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 2994 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP
2995 if (cv) {
2996 dSP;
924508f0 2997 PUSHMARK(SP);
cc49e20b 2998 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 2999 PUTBACK;
864dbfa3 3000 call_sv((SV*)cv, G_DISCARD);
55497cff
PP
3001 }
3002 }
3003
3c10abe3
AG
3004 if (PL_unitcheckav)
3005 call_list(PL_scopestack_ix, PL_unitcheckav);
3006
a0d0e21e
LW
3007 /* compiled okay, so do it */
3008
3280af22
NIS
3009 CvDEPTH(PL_compcv) = 1;
3010 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3011 PL_op = saveop; /* The caller may need it. */
bc177e6b 3012 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3013
3280af22 3014 RETURNOP(PL_eval_start);
a0d0e21e
LW
3015}
3016
a6c40364 3017STATIC PerlIO *
74d5ed12 3018S_check_type_and_open(pTHX_ const char *name, const char *mode)
ce8abf5f
SP
3019{
3020 Stat_t st;
c445ea15 3021 const int st_rc = PerlLIO_stat(name, &st);
df528165 3022
6b845e56 3023 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3024 return NULL;
ce8abf5f
SP
3025 }
3026
ce8abf5f
SP
3027 return PerlIO_open(name, mode);
3028}
3029
3030STATIC PerlIO *
7925835c 3031S_doopen_pm(pTHX_ const char *name, const char *mode)
b295d113 3032{
7925835c 3033#ifndef PERL_DISABLE_PMC
f54cb97a 3034 const STRLEN namelen = strlen(name);
b295d113
TH
3035 PerlIO *fp;
3036
7894fbab 3037 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
9d4ba2ae 3038 SV * const pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
349d4f2f 3039 const char * const pmc = SvPV_nolen_const(pmcsv);
a6c40364
GS
3040 Stat_t pmcstat;
3041 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
85e8f315 3042 fp = check_type_and_open(name, mode);
a6c40364
GS
3043 }
3044 else {
a91233bf 3045 fp = check_type_and_open(pmc, mode);
b295d113 3046 }
a6c40364
GS
3047 SvREFCNT_dec(pmcsv);
3048 }
3049 else {
85e8f315 3050 fp = check_type_and_open(name, mode);
b295d113 3051 }
b295d113 3052 return fp;
7925835c 3053#else
85e8f315 3054 return check_type_and_open(name, mode);
7925835c 3055#endif /* !PERL_DISABLE_PMC */
b295d113
TH
3056}
3057
a0d0e21e
LW
3058PP(pp_require)
3059{
27da23d5 3060 dVAR; dSP;
c09156bb 3061 register PERL_CONTEXT *cx;
a0d0e21e 3062 SV *sv;
5c144d81 3063 const char *name;
6132ea6c 3064 STRLEN len;
c445ea15
AL
3065 const char *tryname = NULL;
3066 SV *namesv = NULL;
f54cb97a 3067 const I32 gimme = GIMME_V;
bbed91b5 3068 int filter_has_file = 0;
c445ea15 3069 PerlIO *tryrsfp = NULL;
34113e50 3070 SV *filter_cache = NULL;
c445ea15
AL
3071 SV *filter_state = NULL;
3072 SV *filter_sub = NULL;
3073 SV *hook_sv = NULL;
6ec9efec
JH
3074 SV *encoding;
3075 OP *op;
a0d0e21e
LW
3076
3077 sv = POPs;
d7aa5382
JP
3078 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
3079 if ( SvVOK(sv) && ckWARN(WARN_PORTABLE) ) /* require v5.6.1 */
9014280d 3080 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
e3407aba 3081 "v-string in use/require non-portable");
d7aa5382
JP
3082
3083 sv = new_version(sv);
3084 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3085 upg_version(PL_patchlevel, TRUE);
149c1637 3086 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3087 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3088 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3089 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3090 }
3091 else {
3092 if ( vcmp(sv,PL_patchlevel) > 0 )
3093 DIE(aTHX_ "Perl %"SVf" required--this is only %"SVf", stopped",
be2597df 3094 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647 3095 }
d7aa5382 3096
7dfde25d
RGS
3097 /* If we request a version >= 5.9.5, load feature.pm with the
3098 * feature bundle that corresponds to the required version.
3099 * We do this only with use, not require. */
ac0e6a2f 3100 if (PL_compcv && vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3101 SV *const importsv = vnormal(sv);
3102 *SvPVX_mutable(importsv) = ':';
3103 ENTER;
3104 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3105 LEAVE;
3106 }
3107
3108 RETPUSHYES;
a0d0e21e 3109 }
5c144d81 3110 name = SvPV_const(sv, len);
6132ea6c 3111 if (!(name && len > 0 && *name))
cea2e8a9 3112 DIE(aTHX_ "Null filename used");
4633a7c4 3113 TAINT_PROPER("require");
44f8325f 3114 if (PL_op->op_type == OP_REQUIRE) {
0bd48802 3115 SV * const * const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
44f8325f
AL
3116 if ( svp ) {
3117 if (*svp != &PL_sv_undef)
3118 RETPUSHYES;
3119 else
3120 DIE(aTHX_ "Compilation failed in require");
3121 }
4d8b06f1 3122 }
a0d0e21e
LW
3123
3124 /* prepare to compile file */
3125
be4b629d 3126 if (path_is_absolute(name)) {
46fc3d4c 3127 tryname = name;
7925835c 3128 tryrsfp = doopen_pm(name,PERL_SCRIPT_MODE);
bf4acbe4 3129 }
67627c52
JH
3130#ifdef MACOS_TRADITIONAL
3131 if (!tryrsfp) {
3132 char newname[256];
3133
3134 MacPerl_CanonDir(name, newname, 1);
3135 if (path_is_absolute(newname)) {
3136 tryname = newname;
7925835c 3137 tryrsfp = doopen_pm(newname,PERL_SCRIPT_MODE);
67627c52
JH
3138 }
3139 }
3140#endif
be4b629d 3141 if (!tryrsfp) {
44f8325f 3142 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3143 I32 i;
748a9306 3144#ifdef VMS
46fc3d4c 3145 char *unixname;
c445ea15 3146 if ((unixname = tounixspec(name, NULL)) != NULL)
46fc3d4c
PP
3147#endif
3148 {
561b68a9 3149 namesv = newSV(0);
46fc3d4c 3150 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3151 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3152
c38a6530
RD
3153 if (SvTIED_mg((SV*)ar, PERL_MAGIC_tied))
3154 mg_get(dirsv);
bbed91b5
KF
3155 if (SvROK(dirsv)) {
3156 int count;
a3b58a99 3157 SV **svp;
bbed91b5
KF
3158 SV *loader = dirsv;
3159
e14e2dc8
NC
3160 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3161 && !sv_isobject(loader))
3162 {
bbed91b5
KF
3163 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3164 }
3165
b900a521 3166 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3167 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3168 tryname = SvPVX_const(namesv);
c445ea15 3169 tryrsfp = NULL;
bbed91b5
KF
3170
3171 ENTER;
3172 SAVETMPS;
3173 EXTEND(SP, 2);
3174
3175 PUSHMARK(SP);
3176 PUSHs(dirsv);
3177 PUSHs(sv);
3178 PUTBACK;
e982885c
NC
3179 if (sv_isobject(loader))
3180 count = call_method("INC", G_ARRAY);
3181 else
3182 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3183 SPAGAIN;
3184
a3b58a99
RGS
3185 /* Adjust file name if the hook has set an %INC entry */
3186 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3187 if (svp)
3188 tryname = SvPVX_const(*svp);
3189
bbed91b5
KF
3190 if (count > 0) {
3191 int i = 0;
3192 SV *arg;
3193
3194 SP -= count - 1;
3195 arg = SP[i++];
3196
34113e50
NC
3197 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3198 && !isGV_with_GP(SvRV(arg))) {
3199 filter_cache = SvRV(arg);
74c765eb 3200 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3201
3202 if (i < count) {
3203 arg = SP[i++];
3204 }
3205 }
3206
bbed91b5
KF
3207 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3208 arg = SvRV(arg);
3209 }
3210
3211 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3212 IO * const io = GvIO((GV *)arg);
bbed91b5
KF
3213
3214 ++filter_has_file;
3215
3216 if (io) {
3217 tryrsfp = IoIFP(io);
0f7de14d
NC
3218 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3219 PerlIO_close(IoOFP(io));
bbed91b5 3220 }
0f7de14d
NC
3221 IoIFP(io) = NULL;
3222 IoOFP(io) = NULL;
bbed91b5
KF
3223 }
3224
3225 if (i < count) {
3226 arg = SP[i++];
3227 }
3228 }
3229
3230 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3231 filter_sub = arg;
74c765eb 3232 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF
3233
3234 if (i < count) {
3235 filter_state = SP[i];
b37c2d43 3236 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3237 }
34113e50 3238 }
bbed91b5 3239
34113e50
NC
3240 if (!tryrsfp && (filter_cache || filter_sub)) {
3241 tryrsfp = PerlIO_open(BIT_BUCKET,
3242 PERL_SCRIPT_MODE);
bbed91b5 3243 }
1d06aecd 3244 SP--;
bbed91b5
KF
3245 }
3246
3247 PUTBACK;
3248 FREETMPS;
3249 LEAVE;
3250
3251 if (tryrsfp) {
89ccab8c 3252 hook_sv = dirsv;
bbed91b5
KF
3253 break;
3254 }
3255
3256 filter_has_file = 0;
34113e50
NC
3257 if (filter_cache) {
3258 SvREFCNT_dec(filter_cache);
3259 filter_cache = NULL;
3260 }
bbed91b5
KF
3261 if (filter_state) {
3262 SvREFCNT_dec(filter_state);
c445ea15 3263 filter_state = NULL;
bbed91b5
KF
3264 }
3265 if (filter_sub) {
3266 SvREFCNT_dec(filter_sub);
c445ea15 3267 filter_sub = NULL;
bbed91b5
KF
3268 }
3269 }
3270 else {
be4b629d
CN
3271 if (!path_is_absolute(name)
3272#ifdef MACOS_TRADITIONAL
3273 /* We consider paths of the form :a:b ambiguous and interpret them first
3274 as global then as local
3275 */
3276 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3277#endif
3278 ) {
4ea561bc 3279 const char *dir = SvPV_nolen_const(dirsv);
bf4acbe4 3280#ifdef MACOS_TRADITIONAL
67627c52
JH
3281 char buf1[256];
3282 char buf2[256];
3283
3284 MacPerl_CanonDir(name, buf2, 1);
3285 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3286#else
27da23d5 3287# ifdef VMS
bbed91b5 3288 char *unixdir;
c445ea15 3289 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF
3290 continue;
3291 sv_setpv(namesv, unixdir);
3292 sv_catpv(namesv, unixname);
27da23d5 3293# else
a0fd4948 3294# ifdef __SYMBIAN32__
27da23d5
JH
3295 if (PL_origfilename[0] &&
3296 PL_origfilename[1] == ':' &&
3297 !(dir[0] && dir[1] == ':'))
3298 Perl_sv_setpvf(aTHX_ namesv,
3299 "%c:%s\\%s",
3300 PL_origfilename[0],
3301 dir, name);
3302 else
3303 Perl_sv_setpvf(aTHX_ namesv,
3304 "%s\\%s",
3305 dir, name);
3306# else
bbed91b5 3307 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
27da23d5
JH
3308# endif
3309# endif
bf4acbe4 3310#endif
bbed91b5 3311 TAINT_PROPER("require");
349d4f2f 3312 tryname = SvPVX_const(namesv);
7925835c 3313 tryrsfp = doopen_pm(tryname, PERL_SCRIPT_MODE);
bbed91b5
KF
3314 if (tryrsfp) {
3315 if (tryname[0] == '.' && tryname[1] == '/')
3316 tryname += 2;
3317 break;
3318 }
ff806af2
DM
3319 else if (errno == EMFILE)
3320 /* no point in trying other paths if out of handles */
3321 break;
be4b629d 3322 }
46fc3d4c 3323 }
a0d0e21e
LW
3324 }
3325 }
3326 }
f4dd75d9 3327 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3328 CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
46fc3d4c 3329 SvREFCNT_dec(namesv);
a0d0e21e 3330 if (!tryrsfp) {
533c011a 3331 if (PL_op->op_type == OP_REQUIRE) {
5c144d81 3332 const char *msgstr = name;
e31de809 3333 if(errno == EMFILE) {
b9b739dc
NC
3334 SV * const msg
3335 = sv_2mortal(Perl_newSVpvf(aTHX_ "%s: %s", msgstr,
3336 Strerror(errno)));
349d4f2f 3337 msgstr = SvPV_nolen_const(msg);
e31de809
SP
3338 } else {
3339 if (namesv) { /* did we lookup @INC? */
44f8325f 3340 AV * const ar = GvAVn(PL_incgv);
e31de809 3341 I32 i;
b8f04b1b
NC
3342 SV * const msg = sv_2mortal(Perl_newSVpvf(aTHX_
3343 "%s in @INC%s%s (@INC contains:",
3344 msgstr,
3345 (instr(msgstr, ".h ")
3346 ? " (change .h to .ph maybe?)" : ""),
3347 (instr(msgstr, ".ph ")
3348 ? " (did you run h2ph?)" : "")
3349 ));
3350
e31de809 3351 for (i = 0; i <= AvFILL(ar); i++) {
396482e1 3352 sv_catpvs(msg, " ");
b8f04b1b 3353 sv_catsv(msg, *av_fetch(ar, i, TRUE));
e31de809 3354 }
396482e1 3355 sv_catpvs(msg, ")");
e31de809
SP
3356 msgstr = SvPV_nolen_const(msg);
3357 }
2683423c 3358 }
ea071790 3359 DIE(aTHX_ "Can't locate %s", msgstr);
a0d0e21e
LW
3360 }
3361
3362 RETPUSHUNDEF;
3363 }
d8bfb8bd 3364 else
93189314 3365 SETERRNO(0, SS_NORMAL);
a0d0e21e
LW
3366
3367 /* Assume success here to prevent recursive requirement. */
238d24b4 3368 /* name is never assigned to again, so len is still strlen(name) */
d3a4e64e 3369 /* Check whether a hook in @INC has already filled %INC */
44f8325f
AL
3370 if (!hook_sv) {
3371 (void)hv_store(GvHVn(PL_incgv), name, len, newSVpv(CopFILE(&PL_compiling),0),0);
3372 } else {
3373 SV** const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3374 if (!svp)
b37c2d43 3375 (void)hv_store(GvHVn(PL_incgv), name, len, SvREFCNT_inc_simple(hook_sv), 0 );
d3a4e64e 3376 }
a0d0e21e
LW
3377
3378 ENTER;
3379 SAVETMPS;
10efb74f 3380 lex_start(NULL);
b9d12d37 3381 SAVEGENERICSV(PL_rsfp_filters);
7d49f689 3382 PL_rsfp_filters = NULL;
e50aee73 3383
3280af22 3384 PL_rsfp = tryrsfp;
b3ac6de7 3385 SAVEHINTS();
3280af22 3386 PL_hints = 0;
68da3b2f 3387 SAVECOMPILEWARNINGS();
0453d815 3388 if (PL_dowarn & G_WARN_ALL_ON)
d3a7d8c7 3389 PL_compiling.cop_warnings = pWARN_ALL ;
0453d815 3390 else if (PL_dowarn & G_WARN_ALL_OFF)
d3a7d8c7 3391 PL_compiling.cop_warnings = pWARN_NONE ;
ac27b0f5 3392 else
d3a7d8c7 3393 PL_compiling.cop_warnings = pWARN_STD ;
a0d0e21e 3394
34113e50 3395 if (filter_sub || filter_cache) {
c445ea15 3396 SV * const datasv = filter_add(S_run_user_filter, NULL);
bbed91b5 3397 IoLINES(datasv) = filter_has_file;
bbed91b5
KF
3398 IoTOP_GV(datasv) = (GV *)filter_state;
3399 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
34113e50 3400 IoFMT_GV(datasv) = (GV *)filter_cache;
bbed91b5
KF
3401 }
3402
3403 /* switch to eval mode */
a0d0e21e 3404 PUSHBLOCK(cx, CXt_EVAL, SP);
a0714e2c 3405</