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[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;
bfed75c6 79
4b5a0d1c 80 /* prevent recompiling under /o and ithreads. */
3db8f154 81#if defined(USE_ITHREADS)
131b3ad0
DM
82 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
83 if (PL_op->op_flags & OPf_STACKED) {
84 dMARK;
85 SP = MARK;
86 }
87 else
88 (void)POPs;
89 RETURN;
90 }
513629ba 91#endif
131b3ad0
DM
92 if (PL_op->op_flags & OPf_STACKED) {
93 /* multiple args; concatentate them */
94 dMARK; dORIGMARK;
95 tmpstr = PAD_SV(ARGTARG);
96 sv_setpvn(tmpstr, "", 0);
97 while (++MARK <= SP) {
98 if (PL_amagic_generation) {
99 SV *sv;
100 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
101 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
102 {
103 sv_setsv(tmpstr, sv);
104 continue;
105 }
106 }
107 sv_catsv(tmpstr, *MARK);
108 }
109 SvSETMAGIC(tmpstr);
110 SP = ORIGMARK;
111 }
112 else
113 tmpstr = POPs;
513629ba 114
b3eb6a9b 115 if (SvROK(tmpstr)) {
d8f6592e 116 SV * const sv = SvRV(tmpstr);
c277df42 117 if(SvMAGICAL(sv))
14befaf4 118 mg = mg_find(sv, PERL_MAGIC_qr);
c277df42 119 }
b3eb6a9b 120 if (mg) {
44f8325f 121 regexp * const re = (regexp *)mg->mg_obj;
aaa362c4
RS
122 ReREFCNT_dec(PM_GETRE(pm));
123 PM_SETRE(pm, ReREFCNT_inc(re));
c277df42
IZ
124 }
125 else {
e62f0680
NC
126 STRLEN len;
127 const char *t = SvPV_const(tmpstr, len);
d8f6592e 128 regexp * const re = PM_GETRE(pm);
c277df42 129
20408e3c 130 /* Check against the last compiled regexp. */
d8f6592e
AL
131 if (!re || !re->precomp || re->prelen != (I32)len ||
132 memNE(re->precomp, t, len))
85aff577 133 {
664e119d
RGS
134 const regexp_engine *eng = re ? re->engine : NULL;
135
d8f6592e
AL
136 if (re) {
137 ReREFCNT_dec(re);
4608196e 138 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
1e2e3d02
YO
139 } else if (PL_curcop->cop_hints_hash) {
140 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
141 "regcomp", 7, 0, 0);
142 if (ptr && SvIOK(ptr) && SvIV(ptr))
143 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 144 }
664e119d 145
533c011a 146 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 147 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 148
c277df42 149 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
84e09d5e
JH
150 if (DO_UTF8(tmpstr))
151 pm->op_pmdynflags |= PMdf_DYN_UTF8;
152 else {
153 pm->op_pmdynflags &= ~PMdf_DYN_UTF8;
154 if (pm->op_pmdynflags & PMdf_UTF8)
155 t = (char*)bytes_to_utf8((U8*)t, &len);
156 }
1e2e3d02
YO
157 if (eng)
158 PM_SETRE(pm, CALLREGCOMP_ENG(eng,(char *)t, (char *)t + len, pm));
159 else
160 PM_SETRE(pm, CALLREGCOMP((char *)t, (char *)t + len, pm));
161
84e09d5e
JH
162 if (!DO_UTF8(tmpstr) && (pm->op_pmdynflags & PMdf_UTF8))
163 Safefree(t);
f86aaa29 164 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 165 inside tie/overload accessors. */
c277df42 166 }
4633a7c4 167 }
a0d0e21e 168
72311751 169#ifndef INCOMPLETE_TAINTS
3280af22
NIS
170 if (PL_tainting) {
171 if (PL_tainted)
72311751
GS
172 pm->op_pmdynflags |= PMdf_TAINTED;
173 else
174 pm->op_pmdynflags &= ~PMdf_TAINTED;
175 }
176#endif
177
aaa362c4 178 if (!PM_GETRE(pm)->prelen && PL_curpm)
3280af22 179 pm = PL_curpm;
e357fc67 180 else if (PM_GETRE(pm)->extflags & RXf_WHITE)
17cbf7cc 181 pm->op_pmflags |= PMf_WHITE;
16bdb4ac 182 else
17cbf7cc 183 pm->op_pmflags &= ~PMf_WHITE;
a0d0e21e 184
2360cd68 185 /* XXX runtime compiled output needs to move to the pad */
a0d0e21e 186 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 187 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
3db8f154 188#if !defined(USE_ITHREADS)
2360cd68 189 /* XXX can't change the optree at runtime either */
533c011a 190 cLOGOP->op_first->op_next = PL_op->op_next;
2360cd68 191#endif
a0d0e21e
LW
192 }
193 RETURN;
194}
195
196PP(pp_substcont)
197{
97aff369 198 dVAR;
39644a26 199 dSP;
c09156bb 200 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
201 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
202 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
203 register char *s = cx->sb_s;
204 register char *m = cx->sb_m;
205 char *orig = cx->sb_orig;
901017d6 206 register REGEXP * const rx = cx->sb_rx;
c445ea15 207 SV *nsv = NULL;
988e6e7e
AE
208 REGEXP *old = PM_GETRE(pm);
209 if(old != rx) {
bfed75c6 210 if(old)
988e6e7e 211 ReREFCNT_dec(old);
e22ae1e2 212 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
213 }
214
d9f97599 215 rxres_restore(&cx->sb_rxres, rx);
01b35787 216 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 217
a0d0e21e 218 if (cx->sb_iters++) {
a3b680e6 219 const I32 saviters = cx->sb_iters;
a0d0e21e 220 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 221 DIE(aTHX_ "Substitution loop");
a0d0e21e 222
48c036b1
GS
223 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
224 cx->sb_rxtainted |= 2;
a0d0e21e 225 sv_catsv(dstr, POPs);
8ff629d9 226 FREETMPS; /* Prevent excess tmp stack */
a0d0e21e
LW
227
228 /* Are we done */
f9f4320a 229 if (cx->sb_once || !CALLREGEXEC(rx, s, cx->sb_strend, orig,
9661b544 230 s == m, cx->sb_targ, NULL,
22e551b9 231 ((cx->sb_rflags & REXEC_COPY_STR)
cf93c79d
IZ
232 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
233 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 234 {
823a54a3 235 SV * const targ = cx->sb_targ;
748a9306 236
078c425b
JH
237 assert(cx->sb_strend >= s);
238 if(cx->sb_strend > s) {
239 if (DO_UTF8(dstr) && !SvUTF8(targ))
240 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
241 else
242 sv_catpvn(dstr, s, cx->sb_strend - s);
243 }
48c036b1 244 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 245
f8c7b90f 246#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
247 if (SvIsCOW(targ)) {
248 sv_force_normal_flags(targ, SV_COW_DROP_PV);
249 } else
250#endif
251 {
8bd4d4c5 252 SvPV_free(targ);
ed252734 253 }
f880fe2f 254 SvPV_set(targ, SvPVX(dstr));
748a9306
LW
255 SvCUR_set(targ, SvCUR(dstr));
256 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH
257 if (DO_UTF8(dstr))
258 SvUTF8_on(targ);
6136c704 259 SvPV_set(dstr, NULL);
48c036b1
GS
260
261 TAINT_IF(cx->sb_rxtainted & 1);
22e13caa 262 PUSHs(sv_2mortal(newSViv(saviters - 1)));
48c036b1 263
ffc61ed2 264 (void)SvPOK_only_UTF8(targ);
48c036b1 265 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 266 SvSETMAGIC(targ);
9212bbba 267 SvTAINT(targ);
5cd24f17 268
4633a7c4 269 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
270 POPSUBST(cx);
271 RETURNOP(pm->op_next);
272 }
8e5e9ebe 273 cx->sb_iters = saviters;
a0d0e21e 274 }
cf93c79d 275 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
276 m = s;
277 s = orig;
cf93c79d 278 cx->sb_orig = orig = rx->subbeg;
a0d0e21e
LW
279 s = orig + (m - s);
280 cx->sb_strend = s + (cx->sb_strend - m);
281 }
cf93c79d 282 cx->sb_m = m = rx->startp[0] + orig;
db79b45b 283 if (m > s) {
bfed75c6 284 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
285 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
286 else
287 sv_catpvn(dstr, s, m-s);
288 }
cf93c79d 289 cx->sb_s = rx->endp[0] + orig;
084916e3 290 { /* Update the pos() information. */
44f8325f 291 SV * const sv = cx->sb_targ;
084916e3
JH
292 MAGIC *mg;
293 I32 i;
7a7f3e45 294 SvUPGRADE(sv, SVt_PVMG);
14befaf4 295 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 296#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 297 if (SvIsCOW(sv))
d83f0a82
NC
298 sv_force_normal_flags(sv, 0);
299#endif
300 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
301 NULL, 0);
084916e3
JH
302 }
303 i = m - orig;
304 if (DO_UTF8(sv))
305 sv_pos_b2u(sv, &i);
306 mg->mg_len = i;
307 }
988e6e7e 308 if (old != rx)
454f1e26 309 (void)ReREFCNT_inc(rx);
d9f97599
GS
310 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
311 rxres_save(&cx->sb_rxres, rx);
a0d0e21e
LW
312 RETURNOP(pm->op_pmreplstart);
313}
314
c90c0ff4 315void
864dbfa3 316Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
317{
318 UV *p = (UV*)*rsp;
319 U32 i;
96a5add6 320 PERL_UNUSED_CONTEXT;
c90c0ff4 321
d9f97599 322 if (!p || p[1] < rx->nparens) {
f8c7b90f 323#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
324 i = 7 + rx->nparens * 2;
325#else
d9f97599 326 i = 6 + rx->nparens * 2;
ed252734 327#endif
c90c0ff4 328 if (!p)
a02a5408 329 Newx(p, i, UV);
c90c0ff4
PP
330 else
331 Renew(p, i, UV);
332 *rsp = (void*)p;
333 }
334
c445ea15 335 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? rx->subbeg : NULL);
cf93c79d 336 RX_MATCH_COPIED_off(rx);
c90c0ff4 337
f8c7b90f 338#ifdef PERL_OLD_COPY_ON_WRITE
ed252734 339 *p++ = PTR2UV(rx->saved_copy);
c445ea15 340 rx->saved_copy = NULL;
ed252734
NC
341#endif
342
d9f97599 343 *p++ = rx->nparens;
c90c0ff4 344
56431972 345 *p++ = PTR2UV(rx->subbeg);
cf93c79d 346 *p++ = (UV)rx->sublen;
d9f97599
GS
347 for (i = 0; i <= rx->nparens; ++i) {
348 *p++ = (UV)rx->startp[i];
349 *p++ = (UV)rx->endp[i];
c90c0ff4
PP
350 }
351}
352
353void
864dbfa3 354Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
355{
356 UV *p = (UV*)*rsp;
357 U32 i;
96a5add6 358 PERL_UNUSED_CONTEXT;
c90c0ff4 359
ed252734 360 RX_MATCH_COPY_FREE(rx);
cf93c79d 361 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
362 *p++ = 0;
363
f8c7b90f 364#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
365 if (rx->saved_copy)
366 SvREFCNT_dec (rx->saved_copy);
367 rx->saved_copy = INT2PTR(SV*,*p);
368 *p++ = 0;
369#endif
370
d9f97599 371 rx->nparens = *p++;
c90c0ff4 372
56431972 373 rx->subbeg = INT2PTR(char*,*p++);
cf93c79d 374 rx->sublen = (I32)(*p++);
d9f97599 375 for (i = 0; i <= rx->nparens; ++i) {
cf93c79d
IZ
376 rx->startp[i] = (I32)(*p++);
377 rx->endp[i] = (I32)(*p++);
c90c0ff4
PP
378 }
379}
380
381void
864dbfa3 382Perl_rxres_free(pTHX_ void **rsp)
c90c0ff4 383{
44f8325f 384 UV * const p = (UV*)*rsp;
96a5add6 385 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
386
387 if (p) {
94010e71
NC
388#ifdef PERL_POISON
389 void *tmp = INT2PTR(char*,*p);
390 Safefree(tmp);
391 if (*p)
7e337ee0 392 PoisonFree(*p, 1, sizeof(*p));
94010e71 393#else
56431972 394 Safefree(INT2PTR(char*,*p));
94010e71 395#endif
f8c7b90f 396#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
397 if (p[1]) {
398 SvREFCNT_dec (INT2PTR(SV*,p[1]));
399 }
400#endif
c90c0ff4 401 Safefree(p);
4608196e 402 *rsp = NULL;
c90c0ff4
PP
403 }
404}
405
a0d0e21e
LW
406PP(pp_formline)
407{
97aff369 408 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 409 register SV * const tmpForm = *++MARK;
dea28490 410 register U32 *fpc;
a0d0e21e 411 register char *t;
245d4a47 412 const char *f;
a0d0e21e 413 register I32 arg;
c445ea15
AL
414 register SV *sv = NULL;
415 const char *item = NULL;
9c5ffd7c
JH
416 I32 itemsize = 0;
417 I32 fieldsize = 0;
a0d0e21e 418 I32 lines = 0;
c445ea15
AL
419 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
420 const char *chophere = NULL;
421 char *linemark = NULL;
65202027 422 NV value;
9c5ffd7c 423 bool gotsome = FALSE;
a0d0e21e 424 STRLEN len;
823a54a3 425 const STRLEN fudge = SvPOK(tmpForm)
24c89738 426 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
427 bool item_is_utf8 = FALSE;
428 bool targ_is_utf8 = FALSE;
c445ea15 429 SV * nsv = NULL;
cbbf8932 430 OP * parseres = NULL;
bfed75c6 431 const char *fmt;
a1b95068 432 bool oneline;
a0d0e21e 433
76e3520e 434 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
435 if (SvREADONLY(tmpForm)) {
436 SvREADONLY_off(tmpForm);
a1b95068 437 parseres = doparseform(tmpForm);
445b3f51
GS
438 SvREADONLY_on(tmpForm);
439 }
440 else
a1b95068
LW
441 parseres = doparseform(tmpForm);
442 if (parseres)
443 return parseres;
a0d0e21e 444 }
3280af22 445 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
446 if (DO_UTF8(PL_formtarget))
447 targ_is_utf8 = TRUE;
a0ed51b3 448 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 449 t += len;
245d4a47 450 f = SvPV_const(tmpForm, len);
a0d0e21e 451 /* need to jump to the next word */
245d4a47 452 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
453
454 for (;;) {
455 DEBUG_f( {
bfed75c6 456 const char *name = "???";
a0d0e21e
LW
457 arg = -1;
458 switch (*fpc) {
459 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
460 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
461 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
462 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
463 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
464
465 case FF_CHECKNL: name = "CHECKNL"; break;
466 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
467 case FF_SPACE: name = "SPACE"; break;
468 case FF_HALFSPACE: name = "HALFSPACE"; break;
469 case FF_ITEM: name = "ITEM"; break;
470 case FF_CHOP: name = "CHOP"; break;
471 case FF_LINEGLOB: name = "LINEGLOB"; break;
472 case FF_NEWLINE: name = "NEWLINE"; break;
473 case FF_MORE: name = "MORE"; break;
474 case FF_LINEMARK: name = "LINEMARK"; break;
475 case FF_END: name = "END"; break;
bfed75c6 476 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 477 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
478 }
479 if (arg >= 0)
bf49b057 480 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 481 else
bf49b057 482 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 483 } );
a0d0e21e
LW
484 switch (*fpc++) {
485 case FF_LINEMARK:
486 linemark = t;
a0d0e21e
LW
487 lines++;
488 gotsome = FALSE;
489 break;
490
491 case FF_LITERAL:
492 arg = *fpc++;
1bd51a4c 493 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 494 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
495 *t = '\0';
496 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
497 t = SvEND(PL_formtarget);
1bd51a4c
IH
498 break;
499 }
500 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 501 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
502 *t = '\0';
503 sv_utf8_upgrade(PL_formtarget);
504 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
505 t = SvEND(PL_formtarget);
506 targ_is_utf8 = TRUE;
507 }
a0d0e21e
LW
508 while (arg--)
509 *t++ = *f++;
510 break;
511
512 case FF_SKIP:
513 f += *fpc++;
514 break;
515
516 case FF_FETCH:
517 arg = *fpc++;
518 f += arg;
519 fieldsize = arg;
520
521 if (MARK < SP)
522 sv = *++MARK;
523 else {
3280af22 524 sv = &PL_sv_no;
599cee73 525 if (ckWARN(WARN_SYNTAX))
9014280d 526 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
527 }
528 break;
529
530 case FF_CHECKNL:
5a34cab7
NC
531 {
532 const char *send;
533 const char *s = item = SvPV_const(sv, len);
534 itemsize = len;
535 if (DO_UTF8(sv)) {
536 itemsize = sv_len_utf8(sv);
537 if (itemsize != (I32)len) {
538 I32 itembytes;
539 if (itemsize > fieldsize) {
540 itemsize = fieldsize;
541 itembytes = itemsize;
542 sv_pos_u2b(sv, &itembytes, 0);
543 }
544 else
545 itembytes = len;
546 send = chophere = s + itembytes;
547 while (s < send) {
548 if (*s & ~31)
549 gotsome = TRUE;
550 else if (*s == '\n')
551 break;
552 s++;
553 }
554 item_is_utf8 = TRUE;
555 itemsize = s - item;
556 sv_pos_b2u(sv, &itemsize);
557 break;
a0ed51b3 558 }
a0ed51b3 559 }
5a34cab7
NC
560 item_is_utf8 = FALSE;
561 if (itemsize > fieldsize)
562 itemsize = fieldsize;
563 send = chophere = s + itemsize;
564 while (s < send) {
565 if (*s & ~31)
566 gotsome = TRUE;
567 else if (*s == '\n')
568 break;
569 s++;
570 }
571 itemsize = s - item;
572 break;
a0ed51b3 573 }
a0d0e21e
LW
574
575 case FF_CHECKCHOP:
5a34cab7
NC
576 {
577 const char *s = item = SvPV_const(sv, len);
578 itemsize = len;
579 if (DO_UTF8(sv)) {
580 itemsize = sv_len_utf8(sv);
581 if (itemsize != (I32)len) {
582 I32 itembytes;
583 if (itemsize <= fieldsize) {
584 const char *send = chophere = s + itemsize;
585 while (s < send) {
586 if (*s == '\r') {
587 itemsize = s - item;
a0ed51b3 588 chophere = s;
a0ed51b3 589 break;
5a34cab7
NC
590 }
591 if (*s++ & ~31)
a0ed51b3 592 gotsome = TRUE;
a0ed51b3 593 }
a0ed51b3 594 }
5a34cab7
NC
595 else {
596 const char *send;
597 itemsize = fieldsize;
598 itembytes = itemsize;
599 sv_pos_u2b(sv, &itembytes, 0);
600 send = chophere = s + itembytes;
601 while (s < send || (s == send && isSPACE(*s))) {
602 if (isSPACE(*s)) {
603 if (chopspace)
604 chophere = s;
605 if (*s == '\r')
606 break;
607 }
608 else {
609 if (*s & ~31)
610 gotsome = TRUE;
611 if (strchr(PL_chopset, *s))
612 chophere = s + 1;
613 }
614 s++;
615 }
616 itemsize = chophere - item;
617 sv_pos_b2u(sv, &itemsize);
618 }
619 item_is_utf8 = TRUE;
a0d0e21e
LW
620 break;
621 }
a0d0e21e 622 }
5a34cab7
NC
623 item_is_utf8 = FALSE;
624 if (itemsize <= fieldsize) {
625 const char *const send = chophere = s + itemsize;
626 while (s < send) {
627 if (*s == '\r') {
628 itemsize = s - item;
a0d0e21e 629 chophere = s;
a0d0e21e 630 break;
5a34cab7
NC
631 }
632 if (*s++ & ~31)
a0d0e21e 633 gotsome = TRUE;
a0d0e21e 634 }
a0d0e21e 635 }
5a34cab7
NC
636 else {
637 const char *send;
638 itemsize = fieldsize;
639 send = chophere = s + itemsize;
640 while (s < send || (s == send && isSPACE(*s))) {
641 if (isSPACE(*s)) {
642 if (chopspace)
643 chophere = s;
644 if (*s == '\r')
645 break;
646 }
647 else {
648 if (*s & ~31)
649 gotsome = TRUE;
650 if (strchr(PL_chopset, *s))
651 chophere = s + 1;
652 }
653 s++;
654 }
655 itemsize = chophere - item;
656 }
657 break;
a0d0e21e 658 }
a0d0e21e
LW
659
660 case FF_SPACE:
661 arg = fieldsize - itemsize;
662 if (arg) {
663 fieldsize -= arg;
664 while (arg-- > 0)
665 *t++ = ' ';
666 }
667 break;
668
669 case FF_HALFSPACE:
670 arg = fieldsize - itemsize;
671 if (arg) {
672 arg /= 2;
673 fieldsize -= arg;
674 while (arg-- > 0)
675 *t++ = ' ';
676 }
677 break;
678
679 case FF_ITEM:
5a34cab7
NC
680 {
681 const char *s = item;
682 arg = itemsize;
683 if (item_is_utf8) {
684 if (!targ_is_utf8) {
685 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
686 *t = '\0';
687 sv_utf8_upgrade(PL_formtarget);
688 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
689 t = SvEND(PL_formtarget);
690 targ_is_utf8 = TRUE;
a0ed51b3 691 }
5a34cab7
NC
692 while (arg--) {
693 if (UTF8_IS_CONTINUED(*s)) {
694 STRLEN skip = UTF8SKIP(s);
695 switch (skip) {
696 default:
697 Move(s,t,skip,char);
698 s += skip;
699 t += skip;
700 break;
701 case 7: *t++ = *s++;
702 case 6: *t++ = *s++;
703 case 5: *t++ = *s++;
704 case 4: *t++ = *s++;
705 case 3: *t++ = *s++;
706 case 2: *t++ = *s++;
707 case 1: *t++ = *s++;
708 }
709 }
710 else {
711 if ( !((*t++ = *s++) & ~31) )
712 t[-1] = ' ';
713 }
a0ed51b3 714 }
5a34cab7 715 break;
a0ed51b3 716 }
5a34cab7
NC
717 if (targ_is_utf8 && !item_is_utf8) {
718 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
719 *t = '\0';
720 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
721 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 722#ifdef EBCDIC
901017d6 723 const int ch = *t;
5a34cab7 724 if (iscntrl(ch))
78da4d13 725#else
5a34cab7 726 if (!(*t & ~31))
78da4d13 727#endif
5a34cab7
NC
728 *t = ' ';
729 }
730 break;
78da4d13 731 }
5a34cab7 732 while (arg--) {
9d116dd7 733#ifdef EBCDIC
901017d6 734 const int ch = *t++ = *s++;
5a34cab7 735 if (iscntrl(ch))
a0d0e21e 736#else
5a34cab7 737 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 738#endif
5a34cab7
NC
739 t[-1] = ' ';
740 }
741 break;
a0d0e21e 742 }
a0d0e21e
LW
743
744 case FF_CHOP:
5a34cab7
NC
745 {
746 const char *s = chophere;
747 if (chopspace) {
af68e756 748 while (isSPACE(*s))
5a34cab7
NC
749 s++;
750 }
751 sv_chop(sv,s);
752 SvSETMAGIC(sv);
753 break;
a0d0e21e 754 }
a0d0e21e 755
a1b95068
LW
756 case FF_LINESNGL:
757 chopspace = 0;
758 oneline = TRUE;
759 goto ff_line;
a0d0e21e 760 case FF_LINEGLOB:
a1b95068
LW
761 oneline = FALSE;
762 ff_line:
5a34cab7
NC
763 {
764 const char *s = item = SvPV_const(sv, len);
765 itemsize = len;
766 if ((item_is_utf8 = DO_UTF8(sv)))
767 itemsize = sv_len_utf8(sv);
768 if (itemsize) {
769 bool chopped = FALSE;
770 const char *const send = s + len;
771 gotsome = TRUE;
772 chophere = s + itemsize;
773 while (s < send) {
774 if (*s++ == '\n') {
775 if (oneline) {
776 chopped = TRUE;
777 chophere = s;
778 break;
779 } else {
780 if (s == send) {
781 itemsize--;
782 chopped = TRUE;
783 } else
784 lines++;
785 }
1bd51a4c 786 }
a0d0e21e 787 }
5a34cab7
NC
788 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
789 if (targ_is_utf8)
790 SvUTF8_on(PL_formtarget);
791 if (oneline) {
792 SvCUR_set(sv, chophere - item);
793 sv_catsv(PL_formtarget, sv);
794 SvCUR_set(sv, itemsize);
795 } else
796 sv_catsv(PL_formtarget, sv);
797 if (chopped)
798 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) - 1);
799 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
800 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
801 if (item_is_utf8)
802 targ_is_utf8 = TRUE;
a0d0e21e 803 }
5a34cab7 804 break;
a0d0e21e 805 }
a0d0e21e 806
a1b95068
LW
807 case FF_0DECIMAL:
808 arg = *fpc++;
809#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
810 fmt = (const char *)
811 ((arg & 256) ?
812 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 813#else
10edeb5d
JH
814 fmt = (const char *)
815 ((arg & 256) ?
816 "%#0*.*f" : "%0*.*f");
a1b95068
LW
817#endif
818 goto ff_dec;
a0d0e21e 819 case FF_DECIMAL:
a0d0e21e 820 arg = *fpc++;
65202027 821#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
822 fmt = (const char *)
823 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 824#else
10edeb5d
JH
825 fmt = (const char *)
826 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 827#endif
a1b95068 828 ff_dec:
784707d5
JP
829 /* If the field is marked with ^ and the value is undefined,
830 blank it out. */
784707d5
JP
831 if ((arg & 512) && !SvOK(sv)) {
832 arg = fieldsize;
833 while (arg--)
834 *t++ = ' ';
835 break;
836 }
837 gotsome = TRUE;
838 value = SvNV(sv);
a1b95068 839 /* overflow evidence */
bfed75c6 840 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
841 arg = fieldsize;
842 while (arg--)
843 *t++ = '#';
844 break;
845 }
784707d5
JP
846 /* Formats aren't yet marked for locales, so assume "yes". */
847 {
848 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 849 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
850 RESTORE_NUMERIC_STANDARD();
851 }
852 t += fieldsize;
853 break;
a1b95068 854
a0d0e21e
LW
855 case FF_NEWLINE:
856 f++;
857 while (t-- > linemark && *t == ' ') ;
858 t++;
859 *t++ = '\n';
860 break;
861
862 case FF_BLANK:
863 arg = *fpc++;
864 if (gotsome) {
865 if (arg) { /* repeat until fields exhausted? */
866 *t = '\0';
b15aece3 867 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 868 lines += FmLINES(PL_formtarget);
a0d0e21e
LW
869 if (lines == 200) {
870 arg = t - linemark;
871 if (strnEQ(linemark, linemark - arg, arg))
cea2e8a9 872 DIE(aTHX_ "Runaway format");
a0d0e21e 873 }
1bd51a4c
IH
874 if (targ_is_utf8)
875 SvUTF8_on(PL_formtarget);
3280af22 876 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
877 SP = ORIGMARK;
878 RETURNOP(cLISTOP->op_first);
879 }
880 }
881 else {
882 t = linemark;
883 lines--;
884 }
885 break;
886
887 case FF_MORE:
5a34cab7
NC
888 {
889 const char *s = chophere;
890 const char *send = item + len;
891 if (chopspace) {
af68e756 892 while (isSPACE(*s) && (s < send))
5a34cab7 893 s++;
a0d0e21e 894 }
5a34cab7
NC
895 if (s < send) {
896 char *s1;
897 arg = fieldsize - itemsize;
898 if (arg) {
899 fieldsize -= arg;
900 while (arg-- > 0)
901 *t++ = ' ';
902 }
903 s1 = t - 3;
904 if (strnEQ(s1," ",3)) {
905 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
906 s1--;
907 }
908 *s1++ = '.';
909 *s1++ = '.';
910 *s1++ = '.';
a0d0e21e 911 }
5a34cab7 912 break;
a0d0e21e 913 }
a0d0e21e
LW
914 case FF_END:
915 *t = '\0';
b15aece3 916 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
917 if (targ_is_utf8)
918 SvUTF8_on(PL_formtarget);
3280af22 919 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
920 SP = ORIGMARK;
921 RETPUSHYES;
922 }
923 }
924}
925
926PP(pp_grepstart)
927{
27da23d5 928 dVAR; dSP;
a0d0e21e
LW
929 SV *src;
930
3280af22 931 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 932 (void)POPMARK;
54310121 933 if (GIMME_V == G_SCALAR)
0b024f31 934 XPUSHs(sv_2mortal(newSViv(0)));
533c011a 935 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 936 }
3280af22 937 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
938 pp_pushmark(); /* push dst */
939 pp_pushmark(); /* push src */
a0d0e21e
LW
940 ENTER; /* enter outer scope */
941
942 SAVETMPS;
59f00321
RGS
943 if (PL_op->op_private & OPpGREP_LEX)
944 SAVESPTR(PAD_SVl(PL_op->op_targ));
945 else
946 SAVE_DEFSV;
a0d0e21e 947 ENTER; /* enter inner scope */
7766f137 948 SAVEVPTR(PL_curpm);
a0d0e21e 949
3280af22 950 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 951 SvTEMP_off(src);
59f00321
RGS
952 if (PL_op->op_private & OPpGREP_LEX)
953 PAD_SVl(PL_op->op_targ) = src;
954 else
955 DEFSV = src;
a0d0e21e
LW
956
957 PUTBACK;
533c011a 958 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 959 pp_pushmark(); /* push top */
533c011a 960 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
961}
962
a0d0e21e
LW
963PP(pp_mapwhile)
964{
27da23d5 965 dVAR; dSP;
f54cb97a 966 const I32 gimme = GIMME_V;
544f3153 967 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
968 I32 count;
969 I32 shift;
970 SV** src;
ac27b0f5 971 SV** dst;
a0d0e21e 972
544f3153 973 /* first, move source pointer to the next item in the source list */
3280af22 974 ++PL_markstack_ptr[-1];
544f3153
GS
975
976 /* if there are new items, push them into the destination list */
4c90a460 977 if (items && gimme != G_VOID) {
544f3153
GS
978 /* might need to make room back there first */
979 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
980 /* XXX this implementation is very pessimal because the stack
981 * is repeatedly extended for every set of items. Is possible
982 * to do this without any stack extension or copying at all
983 * by maintaining a separate list over which the map iterates
18ef8bea 984 * (like foreach does). --gsar */
544f3153
GS
985
986 /* everything in the stack after the destination list moves
987 * towards the end the stack by the amount of room needed */
988 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
989
990 /* items to shift up (accounting for the moved source pointer) */
991 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
992
993 /* This optimization is by Ben Tilly and it does
994 * things differently from what Sarathy (gsar)
995 * is describing. The downside of this optimization is
996 * that leaves "holes" (uninitialized and hopefully unused areas)
997 * to the Perl stack, but on the other hand this
998 * shouldn't be a problem. If Sarathy's idea gets
999 * implemented, this optimization should become
1000 * irrelevant. --jhi */
1001 if (shift < count)
1002 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1003
924508f0
GS
1004 EXTEND(SP,shift);
1005 src = SP;
1006 dst = (SP += shift);
3280af22
NIS
1007 PL_markstack_ptr[-1] += shift;
1008 *PL_markstack_ptr += shift;
544f3153 1009 while (count--)
a0d0e21e
LW
1010 *dst-- = *src--;
1011 }
544f3153 1012 /* copy the new items down to the destination list */
ac27b0f5 1013 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
1014 if (gimme == G_ARRAY) {
1015 while (items-- > 0)
1016 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1017 }
bfed75c6 1018 else {
22023b26
TP
1019 /* scalar context: we don't care about which values map returns
1020 * (we use undef here). And so we certainly don't want to do mortal
1021 * copies of meaningless values. */
1022 while (items-- > 0) {
b988aa42 1023 (void)POPs;
22023b26
TP
1024 *dst-- = &PL_sv_undef;
1025 }
1026 }
a0d0e21e
LW
1027 }
1028 LEAVE; /* exit inner scope */
1029
1030 /* All done yet? */
3280af22 1031 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1032
1033 (void)POPMARK; /* pop top */
1034 LEAVE; /* exit outer scope */
1035 (void)POPMARK; /* pop src */
3280af22 1036 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1037 (void)POPMARK; /* pop dst */
3280af22 1038 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1039 if (gimme == G_SCALAR) {
7cc47870
RGS
1040 if (PL_op->op_private & OPpGREP_LEX) {
1041 SV* sv = sv_newmortal();
1042 sv_setiv(sv, items);
1043 PUSHs(sv);
1044 }
1045 else {
1046 dTARGET;
1047 XPUSHi(items);
1048 }
a0d0e21e 1049 }
54310121
PP
1050 else if (gimme == G_ARRAY)
1051 SP += items;
a0d0e21e
LW
1052 RETURN;
1053 }
1054 else {
1055 SV *src;
1056
1057 ENTER; /* enter inner scope */
7766f137 1058 SAVEVPTR(PL_curpm);
a0d0e21e 1059
544f3153 1060 /* set $_ to the new source item */
3280af22 1061 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1062 SvTEMP_off(src);
59f00321
RGS
1063 if (PL_op->op_private & OPpGREP_LEX)
1064 PAD_SVl(PL_op->op_targ) = src;
1065 else
1066 DEFSV = src;
a0d0e21e
LW
1067
1068 RETURNOP(cLOGOP->op_other);
1069 }
1070}
1071
a0d0e21e
LW
1072/* Range stuff. */
1073
1074PP(pp_range)
1075{
97aff369 1076 dVAR;
a0d0e21e 1077 if (GIMME == G_ARRAY)
1a67a97c 1078 return NORMAL;
538573f7 1079 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1080 return cLOGOP->op_other;
538573f7 1081 else
1a67a97c 1082 return NORMAL;
a0d0e21e
LW
1083}
1084
1085PP(pp_flip)
1086{
97aff369 1087 dVAR;
39644a26 1088 dSP;
a0d0e21e
LW
1089
1090 if (GIMME == G_ARRAY) {
1a67a97c 1091 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1092 }
1093 else {
1094 dTOPss;
44f8325f 1095 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1096 int flip = 0;
790090df 1097
bfed75c6 1098 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1099 if (GvIO(PL_last_in_gv)) {
1100 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1101 }
1102 else {
fafc274c 1103 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1104 if (gv && GvSV(gv))
1105 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1106 }
bfed75c6
AL
1107 } else {
1108 flip = SvTRUE(sv);
1109 }
1110 if (flip) {
a0d0e21e 1111 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1112 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1113 sv_setiv(targ, 1);
3e3baf6d 1114 SETs(targ);
a0d0e21e
LW
1115 RETURN;
1116 }
1117 else {
1118 sv_setiv(targ, 0);
924508f0 1119 SP--;
1a67a97c 1120 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1121 }
1122 }
c69006e4 1123 sv_setpvn(TARG, "", 0);
a0d0e21e
LW
1124 SETs(targ);
1125 RETURN;
1126 }
1127}
1128
8e9bbdb9
RGS
1129/* This code tries to decide if "$left .. $right" should use the
1130 magical string increment, or if the range is numeric (we make
1131 an exception for .."0" [#18165]). AMS 20021031. */
1132
1133#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1134 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1135 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1136 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1137 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1138 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1139
a0d0e21e
LW
1140PP(pp_flop)
1141{
97aff369 1142 dVAR; dSP;
a0d0e21e
LW
1143
1144 if (GIMME == G_ARRAY) {
1145 dPOPPOPssrl;
86cb7173 1146
5b295bef
RD
1147 SvGETMAGIC(left);
1148 SvGETMAGIC(right);
a0d0e21e 1149
8e9bbdb9 1150 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1151 register IV i, j;
1152 IV max;
4fe3f0fa
MHM
1153 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1154 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1155 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1156 i = SvIV(left);
1157 max = SvIV(right);
bbce6d69 1158 if (max >= i) {
c1ab3db2
AK
1159 j = max - i + 1;
1160 EXTEND_MORTAL(j);
1161 EXTEND(SP, j);
bbce6d69 1162 }
c1ab3db2
AK
1163 else
1164 j = 0;
1165 while (j--) {
901017d6 1166 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1167 PUSHs(sv);
1168 }
1169 }
1170 else {
44f8325f 1171 SV * const final = sv_mortalcopy(right);
13c5b33c 1172 STRLEN len;
823a54a3 1173 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1174
901017d6 1175 SV *sv = sv_mortalcopy(left);
13c5b33c 1176 SvPV_force_nolen(sv);
89ea2908 1177 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1178 XPUSHs(sv);
b15aece3 1179 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1180 break;
a0d0e21e
LW
1181 sv = sv_2mortal(newSVsv(sv));
1182 sv_inc(sv);
1183 }
a0d0e21e
LW
1184 }
1185 }
1186 else {
1187 dTOPss;
901017d6 1188 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1189 int flop = 0;
a0d0e21e 1190 sv_inc(targ);
4e3399f9
YST
1191
1192 if (PL_op->op_private & OPpFLIP_LINENUM) {
1193 if (GvIO(PL_last_in_gv)) {
1194 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1195 }
1196 else {
fafc274c 1197 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1198 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1199 }
1200 }
1201 else {
1202 flop = SvTRUE(sv);
1203 }
1204
1205 if (flop) {
a0d0e21e 1206 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1207 sv_catpvs(targ, "E0");
a0d0e21e
LW
1208 }
1209 SETs(targ);
1210 }
1211
1212 RETURN;
1213}
1214
1215/* Control. */
1216
27da23d5 1217static const char * const context_name[] = {
515afda2
NC
1218 "pseudo-block",
1219 "subroutine",
1220 "eval",
1221 "loop",
1222 "substitution",
1223 "block",
0d863452
RH
1224 "format",
1225 "given",
1226 "when"
515afda2
NC
1227};
1228
76e3520e 1229STATIC I32
06b5626a 1230S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1231{
97aff369 1232 dVAR;
a0d0e21e 1233 register I32 i;
a0d0e21e
LW
1234
1235 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1236 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1237 switch (CxTYPE(cx)) {
a0d0e21e 1238 case CXt_SUBST:
a0d0e21e 1239 case CXt_SUB:
7766f137 1240 case CXt_FORMAT:
a0d0e21e 1241 case CXt_EVAL:
0a753a76 1242 case CXt_NULL:
0d863452
RH
1243 case CXt_GIVEN:
1244 case CXt_WHEN:
e476b1b5 1245 if (ckWARN(WARN_EXITING))
515afda2
NC
1246 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1247 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1248 if (CxTYPE(cx) == CXt_NULL)
1249 return -1;
1250 break;
a0d0e21e 1251 case CXt_LOOP:
901017d6 1252 if ( !cx->blk_loop.label || strNE(label, cx->blk_loop.label) ) {
cea2e8a9 1253 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
68dc0745 1254 (long)i, cx->blk_loop.label));
a0d0e21e
LW
1255 continue;
1256 }
cea2e8a9 1257 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1258 return i;
1259 }
1260 }
1261 return i;
1262}
1263
0d863452
RH
1264
1265
e50aee73 1266I32
864dbfa3 1267Perl_dowantarray(pTHX)
e50aee73 1268{
97aff369 1269 dVAR;
f54cb97a 1270 const I32 gimme = block_gimme();
54310121
PP
1271 return (gimme == G_VOID) ? G_SCALAR : gimme;
1272}
1273
1274I32
864dbfa3 1275Perl_block_gimme(pTHX)
54310121 1276{
97aff369 1277 dVAR;
06b5626a 1278 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1279 if (cxix < 0)
46fc3d4c 1280 return G_VOID;
e50aee73 1281
54310121 1282 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1283 case G_VOID:
1284 return G_VOID;
54310121 1285 case G_SCALAR:
e50aee73 1286 return G_SCALAR;
54310121
PP
1287 case G_ARRAY:
1288 return G_ARRAY;
1289 default:
cea2e8a9 1290 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1291 /* NOTREACHED */
1292 return 0;
54310121 1293 }
e50aee73
AD
1294}
1295
78f9721b
SM
1296I32
1297Perl_is_lvalue_sub(pTHX)
1298{
97aff369 1299 dVAR;
06b5626a 1300 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1301 assert(cxix >= 0); /* We should only be called from inside subs */
1302
cc8d50a7
NC
1303 if (cxstack[cxix].blk_sub.lval && CvLVALUE(cxstack[cxix].blk_sub.cv))
1304 return cxstack[cxix].blk_sub.lval;
78f9721b
SM
1305 else
1306 return 0;
1307}
1308
76e3520e 1309STATIC I32
cea2e8a9 1310S_dopoptosub(pTHX_ I32 startingblock)
a0d0e21e 1311{
97aff369 1312 dVAR;
2c375eb9
GS
1313 return dopoptosub_at(cxstack, startingblock);
1314}
1315
1316STATIC I32
901017d6 1317S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1318{
97aff369 1319 dVAR;
a0d0e21e 1320 I32 i;
a0d0e21e 1321 for (i = startingblock; i >= 0; i--) {
901017d6 1322 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1323 switch (CxTYPE(cx)) {
a0d0e21e
LW
1324 default:
1325 continue;
1326 case CXt_EVAL:
1327 case CXt_SUB:
7766f137 1328 case CXt_FORMAT:
cea2e8a9 1329 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1330 return i;
1331 }
1332 }
1333 return i;
1334}
1335
76e3520e 1336STATIC I32
cea2e8a9 1337S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1338{
97aff369 1339 dVAR;
a0d0e21e 1340 I32 i;
a0d0e21e 1341 for (i = startingblock; i >= 0; i--) {
06b5626a 1342 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1343 switch (CxTYPE(cx)) {
a0d0e21e
LW
1344 default:
1345 continue;
1346 case CXt_EVAL:
cea2e8a9 1347 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1348 return i;
1349 }
1350 }
1351 return i;
1352}
1353
76e3520e 1354STATIC I32
cea2e8a9 1355S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1356{
97aff369 1357 dVAR;
a0d0e21e 1358 I32 i;
a0d0e21e 1359 for (i = startingblock; i >= 0; i--) {
901017d6 1360 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1361 switch (CxTYPE(cx)) {
a0d0e21e 1362 case CXt_SUBST:
a0d0e21e 1363 case CXt_SUB:
7766f137 1364 case CXt_FORMAT:
a0d0e21e 1365 case CXt_EVAL:
0a753a76 1366 case CXt_NULL:
e476b1b5 1367 if (ckWARN(WARN_EXITING))
515afda2
NC
1368 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1369 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1370 if ((CxTYPE(cx)) == CXt_NULL)
1371 return -1;
1372 break;
a0d0e21e 1373 case CXt_LOOP:
cea2e8a9 1374 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1375 return i;
1376 }
1377 }
1378 return i;
1379}
1380
0d863452
RH
1381STATIC I32
1382S_dopoptogiven(pTHX_ I32 startingblock)
1383{
97aff369 1384 dVAR;
0d863452
RH
1385 I32 i;
1386 for (i = startingblock; i >= 0; i--) {
1387 register const PERL_CONTEXT *cx = &cxstack[i];
1388 switch (CxTYPE(cx)) {
1389 default:
1390 continue;
1391 case CXt_GIVEN:
1392 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1393 return i;
1394 case CXt_LOOP:
1395 if (CxFOREACHDEF(cx)) {
1396 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1397 return i;
1398 }
1399 }
1400 }
1401 return i;
1402}
1403
1404STATIC I32
1405S_dopoptowhen(pTHX_ I32 startingblock)
1406{
97aff369 1407 dVAR;
0d863452
RH
1408 I32 i;
1409 for (i = startingblock; i >= 0; i--) {
1410 register const PERL_CONTEXT *cx = &cxstack[i];
1411 switch (CxTYPE(cx)) {
1412 default:
1413 continue;
1414 case CXt_WHEN:
1415 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1416 return i;
1417 }
1418 }
1419 return i;
1420}
1421
a0d0e21e 1422void
864dbfa3 1423Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1424{
97aff369 1425 dVAR;
a0d0e21e
LW
1426 I32 optype;
1427
1428 while (cxstack_ix > cxix) {
b0d9ce38 1429 SV *sv;
06b5626a 1430 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1431 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1432 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1433 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1434 switch (CxTYPE(cx)) {
c90c0ff4
PP
1435 case CXt_SUBST:
1436 POPSUBST(cx);
1437 continue; /* not break */
a0d0e21e 1438 case CXt_SUB:
b0d9ce38
GS
1439 POPSUB(cx,sv);
1440 LEAVESUB(sv);
a0d0e21e
LW
1441 break;
1442 case CXt_EVAL:
1443 POPEVAL(cx);
1444 break;
1445 case CXt_LOOP:
1446 POPLOOP(cx);
1447 break;
0a753a76 1448 case CXt_NULL:
a0d0e21e 1449 break;
7766f137
GS
1450 case CXt_FORMAT:
1451 POPFORMAT(cx);
1452 break;
a0d0e21e 1453 }
c90c0ff4 1454 cxstack_ix--;
a0d0e21e 1455 }
1b6737cc 1456 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1457}
1458
5a844595
GS
1459void
1460Perl_qerror(pTHX_ SV *err)
1461{
97aff369 1462 dVAR;
5a844595
GS
1463 if (PL_in_eval)
1464 sv_catsv(ERRSV, err);
1465 else if (PL_errors)
1466 sv_catsv(PL_errors, err);
1467 else
be2597df 1468 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
5a844595
GS
1469 ++PL_error_count;
1470}
1471
a0d0e21e 1472OP *
35a4481c 1473Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1474{
27da23d5 1475 dVAR;
87582a92 1476
3280af22 1477 if (PL_in_eval) {
a0d0e21e 1478 I32 cxix;
a0d0e21e 1479 I32 gimme;
a0d0e21e 1480
4e6ea2c3 1481 if (message) {
faef0170 1482 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1483 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1484 SV * const err = ERRSV;
c445ea15 1485 const char *e = NULL;
98eae8f5 1486 if (!SvPOK(err))
c69006e4 1487 sv_setpvn(err,"",0);
98eae8f5 1488 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1489 STRLEN len;
349d4f2f 1490 e = SvPV_const(err, len);
0510663f 1491 e += len - msglen;
98eae8f5 1492 if (*e != *message || strNE(e,message))
c445ea15 1493 e = NULL;
98eae8f5
GS
1494 }
1495 if (!e) {
1496 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1497 sv_catpvn(err, prefix, sizeof(prefix)-1);
1498 sv_catpvn(err, message, msglen);
e476b1b5 1499 if (ckWARN(WARN_MISC)) {
504618e9 1500 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1501 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1502 }
4633a7c4 1503 }
4633a7c4 1504 }
1aa99e6b 1505 else {
06bf62c7 1506 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1507 }
4633a7c4 1508 }
4e6ea2c3 1509
5a844595
GS
1510 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1511 && PL_curstackinfo->si_prev)
1512 {
bac4b2ad 1513 dounwind(-1);
d3acc0f7 1514 POPSTACK;
bac4b2ad 1515 }
e336de0d 1516
a0d0e21e
LW
1517 if (cxix >= 0) {
1518 I32 optype;
35a4481c 1519 register PERL_CONTEXT *cx;
901017d6 1520 SV **newsp;
a0d0e21e
LW
1521
1522 if (cxix < cxstack_ix)
1523 dounwind(cxix);
1524
3280af22 1525 POPBLOCK(cx,PL_curpm);
6b35e009 1526 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1527 if (!message)
349d4f2f 1528 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1529 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1530 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1531 my_exit(1);
1532 }
1533 POPEVAL(cx);
1534
1535 if (gimme == G_SCALAR)
3280af22
NIS
1536 *++newsp = &PL_sv_undef;
1537 PL_stack_sp = newsp;
a0d0e21e
LW
1538
1539 LEAVE;
748a9306 1540
7fb6a879
GS
1541 /* LEAVE could clobber PL_curcop (see save_re_context())
1542 * XXX it might be better to find a way to avoid messing with
1543 * PL_curcop in save_re_context() instead, but this is a more
1544 * minimal fix --GSAR */
1545 PL_curcop = cx->blk_oldcop;
1546
7a2e2cd6 1547 if (optype == OP_REQUIRE) {
44f8325f 1548 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1549 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1550 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1551 &PL_sv_undef, 0);
5a844595
GS
1552 DIE(aTHX_ "%sCompilation failed in require",
1553 *msg ? msg : "Unknown error\n");
7a2e2cd6 1554 }
f39bc417
DM
1555 assert(CxTYPE(cx) == CXt_EVAL);
1556 return cx->blk_eval.retop;
a0d0e21e
LW
1557 }
1558 }
9cc2fdd3 1559 if (!message)
349d4f2f 1560 message = SvPVx_const(ERRSV, msglen);
87582a92 1561
7ff03255 1562 write_to_stderr(message, msglen);
f86702cc
PP
1563 my_failure_exit();
1564 /* NOTREACHED */
a0d0e21e
LW
1565 return 0;
1566}
1567
1568PP(pp_xor)
1569{
97aff369 1570 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1571 if (SvTRUE(left) != SvTRUE(right))
1572 RETSETYES;
1573 else
1574 RETSETNO;
1575}
1576
a0d0e21e
LW
1577PP(pp_caller)
1578{
97aff369 1579 dVAR;
39644a26 1580 dSP;
a0d0e21e 1581 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1582 register const PERL_CONTEXT *cx;
1583 register const PERL_CONTEXT *ccstack = cxstack;
1584 const PERL_SI *top_si = PL_curstackinfo;
54310121 1585 I32 gimme;
06b5626a 1586 const char *stashname;
a0d0e21e
LW
1587 I32 count = 0;
1588
1589 if (MAXARG)
1590 count = POPi;
27d41816 1591
a0d0e21e 1592 for (;;) {
2c375eb9
GS
1593 /* we may be in a higher stacklevel, so dig down deeper */
1594 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1595 top_si = top_si->si_prev;
1596 ccstack = top_si->si_cxstack;
1597 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1598 }
a0d0e21e 1599 if (cxix < 0) {
27d41816
DM
1600 if (GIMME != G_ARRAY) {
1601 EXTEND(SP, 1);
a0d0e21e 1602 RETPUSHUNDEF;
27d41816 1603 }
a0d0e21e
LW
1604 RETURN;
1605 }
f2a7f298 1606 /* caller() should not report the automatic calls to &DB::sub */
1607 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1608 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1609 count++;
1610 if (!count--)
1611 break;
2c375eb9 1612 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1613 }
2c375eb9
GS
1614
1615 cx = &ccstack[cxix];
7766f137 1616 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1617 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1618 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1619 field below is defined for any cx. */
f2a7f298 1620 /* caller() should not report the automatic calls to &DB::sub */
1621 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1622 cx = &ccstack[dbcxix];
06a5b730
PP
1623 }
1624
ed094faf 1625 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1626 if (GIMME != G_ARRAY) {
27d41816 1627 EXTEND(SP, 1);
ed094faf 1628 if (!stashname)
3280af22 1629 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1630 else {
1631 dTARGET;
ed094faf 1632 sv_setpv(TARG, stashname);
49d8d3a1
MB
1633 PUSHs(TARG);
1634 }
a0d0e21e
LW
1635 RETURN;
1636 }
a0d0e21e 1637
b3ca2e83 1638 EXTEND(SP, 11);
27d41816 1639
ed094faf 1640 if (!stashname)
3280af22 1641 PUSHs(&PL_sv_undef);
49d8d3a1 1642 else
ed094faf 1643 PUSHs(sv_2mortal(newSVpv(stashname, 0)));
248c2a4d 1644 PUSHs(sv_2mortal(newSVpv(OutCopFILE(cx->blk_oldcop), 0)));
57843af0 1645 PUSHs(sv_2mortal(newSViv((I32)CopLINE(cx->blk_oldcop))));
a0d0e21e
LW
1646 if (!MAXARG)
1647 RETURN;
7766f137 1648 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1649 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1650 /* So is ccstack[dbcxix]. */
07b8c804 1651 if (isGV(cvgv)) {
561b68a9 1652 SV * const sv = newSV(0);
c445ea15 1653 gv_efullname3(sv, cvgv, NULL);
07b8c804 1654 PUSHs(sv_2mortal(sv));
cc8d50a7 1655 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804
RGS
1656 }
1657 else {
396482e1 1658 PUSHs(sv_2mortal(newSVpvs("(unknown)")));
cc8d50a7 1659 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804 1660 }
a0d0e21e
LW
1661 }
1662 else {
396482e1 1663 PUSHs(sv_2mortal(newSVpvs("(eval)")));
a0d0e21e
LW
1664 PUSHs(sv_2mortal(newSViv(0)));
1665 }
54310121
PP
1666 gimme = (I32)cx->blk_gimme;
1667 if (gimme == G_VOID)
3280af22 1668 PUSHs(&PL_sv_undef);
54310121
PP
1669 else
1670 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
6b35e009 1671 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1672 /* eval STRING */
06a5b730 1673 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1674 PUSHs(cx->blk_eval.cur_text);
3280af22 1675 PUSHs(&PL_sv_no);
0f79a09d 1676 }
811a4de9 1677 /* require */
0f79a09d
GS
1678 else if (cx->blk_eval.old_namesv) {
1679 PUSHs(sv_2mortal(newSVsv(cx->blk_eval.old_namesv)));
3280af22 1680 PUSHs(&PL_sv_yes);
06a5b730 1681 }
811a4de9
GS
1682 /* eval BLOCK (try blocks have old_namesv == 0) */
1683 else {
1684 PUSHs(&PL_sv_undef);
1685 PUSHs(&PL_sv_undef);
1686 }
4633a7c4 1687 }
a682de96
GS
1688 else {
1689 PUSHs(&PL_sv_undef);
1690 PUSHs(&PL_sv_undef);
1691 }
cc8d50a7 1692 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
ed094faf 1693 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1694 {
66a1b24b
AL
1695 AV * const ary = cx->blk_sub.argarray;
1696 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1697
3280af22 1698 if (!PL_dbargs) {
71315bf2 1699 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1700 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1701 GvMULTI_on(tmpgv);
3ddcf04c 1702 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1703 }
1704
3280af22
NIS
1705 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1706 av_extend(PL_dbargs, AvFILLp(ary) + off);
1707 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1708 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1709 }
f3aa04c2
GS
1710 /* XXX only hints propagated via op_private are currently
1711 * visible (others are not easily accessible, since they
1712 * use the global PL_hints) */
623e6609 1713 PUSHs(sv_2mortal(newSViv(CopHINTS_get(cx->blk_oldcop))));
e476b1b5
GS
1714 {
1715 SV * mask ;
72dc9ed5 1716 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1717
ac27b0f5 1718 if (old_warnings == pWARN_NONE ||
114bafba 1719 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1720 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1721 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1722 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1723 /* Get the bit mask for $warnings::Bits{all}, because
1724 * it could have been extended by warnings::register */
1725 SV **bits_all;
0bd48802 1726 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1727 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1728 mask = newSVsv(*bits_all);
1729 }
1730 else {
1731 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1732 }
1733 }
e476b1b5 1734 else
72dc9ed5 1735 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
e476b1b5
GS
1736 PUSHs(sv_2mortal(mask));
1737 }
b3ca2e83 1738
c28fe1ec 1739 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1740 sv_2mortal(newRV_noinc(
c28fe1ec
NC
1741 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1742 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1743 : &PL_sv_undef);
a0d0e21e
LW
1744 RETURN;
1745}
1746
a0d0e21e
LW
1747PP(pp_reset)
1748{
97aff369 1749 dVAR;
39644a26 1750 dSP;
10edeb5d 1751 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1752 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1753 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1754 RETURN;
1755}
1756
dd2155a4
DM
1757/* like pp_nextstate, but used instead when the debugger is active */
1758
a0d0e21e
LW
1759PP(pp_dbstate)
1760{
27da23d5 1761 dVAR;
533c011a 1762 PL_curcop = (COP*)PL_op;
a0d0e21e 1763 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1764 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1765 FREETMPS;
1766
5df8de69
DM
1767 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1768 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1769 {
39644a26 1770 dSP;
c09156bb 1771 register PERL_CONTEXT *cx;
f54cb97a 1772 const I32 gimme = G_ARRAY;
eb160463 1773 U8 hasargs;
0bd48802
AL
1774 GV * const gv = PL_DBgv;
1775 register CV * const cv = GvCV(gv);
a0d0e21e 1776
a0d0e21e 1777 if (!cv)
cea2e8a9 1778 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1779
aea4f609
DM
1780 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1781 /* don't do recursive DB::DB call */
a0d0e21e 1782 return NORMAL;
748a9306 1783
4633a7c4
LW
1784 ENTER;
1785 SAVETMPS;
1786
3280af22 1787 SAVEI32(PL_debug);
55497cff 1788 SAVESTACK_POS();
3280af22 1789 PL_debug = 0;
748a9306 1790 hasargs = 0;
924508f0 1791 SPAGAIN;
748a9306 1792
aed2304a 1793 if (CvISXSUB(cv)) {
c127bd3a
SF
1794 CvDEPTH(cv)++;
1795 PUSHMARK(SP);
1796 (void)(*CvXSUB(cv))(aTHX_ cv);
1797 CvDEPTH(cv)--;
1798 FREETMPS;
1799 LEAVE;
1800 return NORMAL;
1801 }
1802 else {
1803 PUSHBLOCK(cx, CXt_SUB, SP);
1804 PUSHSUB_DB(cx);
1805 cx->blk_sub.retop = PL_op->op_next;
1806 CvDEPTH(cv)++;
1807 SAVECOMPPAD();
1808 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1809 RETURNOP(CvSTART(cv));
1810 }
a0d0e21e
LW
1811 }
1812 else
1813 return NORMAL;
1814}
1815
a0d0e21e
LW
1816PP(pp_enteriter)
1817{
27da23d5 1818 dVAR; dSP; dMARK;
c09156bb 1819 register PERL_CONTEXT *cx;
f54cb97a 1820 const I32 gimme = GIMME_V;
a0d0e21e 1821 SV **svp;
df43650b 1822 U16 cxtype = CXt_LOOP | CXp_FOREACH;
7766f137
GS
1823#ifdef USE_ITHREADS
1824 void *iterdata;
1825#endif
a0d0e21e 1826
4633a7c4
LW
1827 ENTER;
1828 SAVETMPS;
1829
533c011a 1830 if (PL_op->op_targ) {
14f338dc
DM
1831 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1832 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1833 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1834 SVs_PADSTALE, SVs_PADSTALE);
1835 }
c3564e5c 1836#ifndef USE_ITHREADS
dd2155a4 1837 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
54b9620d 1838 SAVESPTR(*svp);
c3564e5c
GS
1839#else
1840 SAVEPADSV(PL_op->op_targ);
cbfa9890 1841 iterdata = INT2PTR(void*, PL_op->op_targ);
7766f137
GS
1842 cxtype |= CXp_PADVAR;
1843#endif
54b9620d
MB
1844 }
1845 else {
0bd48802 1846 GV * const gv = (GV*)POPs;
7766f137 1847 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1848 SAVEGENERICSV(*svp);
561b68a9 1849 *svp = newSV(0);
7766f137
GS
1850#ifdef USE_ITHREADS
1851 iterdata = (void*)gv;
1852#endif
54b9620d 1853 }
4633a7c4 1854
0d863452
RH
1855 if (PL_op->op_private & OPpITER_DEF)
1856 cxtype |= CXp_FOR_DEF;
1857
a0d0e21e
LW
1858 ENTER;
1859
7766f137
GS
1860 PUSHBLOCK(cx, cxtype, SP);
1861#ifdef USE_ITHREADS
1862 PUSHLOOP(cx, iterdata, MARK);
1863#else
a0d0e21e 1864 PUSHLOOP(cx, svp, MARK);
7766f137 1865#endif
533c011a 1866 if (PL_op->op_flags & OPf_STACKED) {
44a8e56a 1867 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
89ea2908
GA
1868 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1869 dPOPss;
0bd48802 1870 SV * const right = (SV*)cx->blk_loop.iterary;
984a4bea
RD
1871 SvGETMAGIC(sv);
1872 SvGETMAGIC(right);
4fe3f0fa
MHM
1873 if (RANGE_IS_NUMERIC(sv,right)) {
1874 if ((SvOK(sv) && SvNV(sv) < IV_MIN) ||
1875 (SvOK(right) && SvNV(right) >= IV_MAX))
076d9a11
MHM
1876 DIE(aTHX_ "Range iterator outside integer range");
1877 cx->blk_loop.iterix = SvIV(sv);
4fe3f0fa 1878 cx->blk_loop.itermax = SvIV(right);
d4665a05
DM
1879#ifdef DEBUGGING
1880 /* for correct -Dstv display */
1881 cx->blk_oldsp = sp - PL_stack_base;
1882#endif
89ea2908 1883 }
3f63a782 1884 else {
89ea2908 1885 cx->blk_loop.iterlval = newSVsv(sv);
13c5b33c 1886 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
10516c54 1887 (void) SvPV_nolen_const(right);
3f63a782 1888 }
89ea2908 1889 }
ef3e5ea9 1890 else if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1891 cx->blk_loop.itermax = 0;
1892 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary) + 1;
ef3e5ea9
NC
1893
1894 }
89ea2908 1895 }
4633a7c4 1896 else {
3280af22
NIS
1897 cx->blk_loop.iterary = PL_curstack;
1898 AvFILLp(PL_curstack) = SP - PL_stack_base;
ef3e5ea9 1899 if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1900 cx->blk_loop.itermax = MARK - PL_stack_base + 1;
1901 cx->blk_loop.iterix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1902 }
1903 else {
1904 cx->blk_loop.iterix = MARK - PL_stack_base;
1905 }
4633a7c4 1906 }
a0d0e21e
LW
1907
1908 RETURN;
1909}
1910
1911PP(pp_enterloop)
1912{
27da23d5 1913 dVAR; dSP;
c09156bb 1914 register PERL_CONTEXT *cx;
f54cb97a 1915 const I32 gimme = GIMME_V;
a0d0e21e
LW
1916
1917 ENTER;
1918 SAVETMPS;
1919 ENTER;
1920
1921 PUSHBLOCK(cx, CXt_LOOP, SP);
1922 PUSHLOOP(cx, 0, SP);
1923
1924 RETURN;
1925}
1926
1927PP(pp_leaveloop)
1928{
27da23d5 1929 dVAR; dSP;
c09156bb 1930 register PERL_CONTEXT *cx;
a0d0e21e
LW
1931 I32 gimme;
1932 SV **newsp;
1933 PMOP *newpm;
1934 SV **mark;
1935
1936 POPBLOCK(cx,newpm);
3a1b2b9e 1937 assert(CxTYPE(cx) == CXt_LOOP);
4fdae800 1938 mark = newsp;
a8bba7fa 1939 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1940
a1f49e72 1941 TAINT_NOT;
54310121 1942 if (gimme == G_VOID)
6f207bd3 1943 NOOP;
54310121
PP
1944 else if (gimme == G_SCALAR) {
1945 if (mark < SP)
1946 *++newsp = sv_mortalcopy(*SP);
1947 else
3280af22 1948 *++newsp = &PL_sv_undef;
a0d0e21e
LW
1949 }
1950 else {
a1f49e72 1951 while (mark < SP) {
a0d0e21e 1952 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
1953 TAINT_NOT; /* Each item is independent */
1954 }
a0d0e21e 1955 }
f86702cc
PP
1956 SP = newsp;
1957 PUTBACK;
1958
a8bba7fa 1959 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 1960 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 1961
a0d0e21e
LW
1962 LEAVE;
1963 LEAVE;
1964
f86702cc 1965 return NORMAL;
a0d0e21e
LW
1966}
1967
1968PP(pp_return)
1969{
27da23d5 1970 dVAR; dSP; dMARK;
c09156bb 1971 register PERL_CONTEXT *cx;
f86702cc 1972 bool popsub2 = FALSE;
b45de488 1973 bool clear_errsv = FALSE;
a0d0e21e
LW
1974 I32 gimme;
1975 SV **newsp;
1976 PMOP *newpm;
1977 I32 optype = 0;
b0d9ce38 1978 SV *sv;
f39bc417 1979 OP *retop;
a0d0e21e 1980
0bd48802
AL
1981 const I32 cxix = dopoptosub(cxstack_ix);
1982
9850bf21
RH
1983 if (cxix < 0) {
1984 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
1985 * sort block, which is a CXt_NULL
1986 * not a CXt_SUB */
1987 dounwind(0);
d7507f74
RH
1988 PL_stack_base[1] = *PL_stack_sp;
1989 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
1990 return 0;
1991 }
9850bf21
RH
1992 else
1993 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 1994 }
a0d0e21e
LW
1995 if (cxix < cxstack_ix)
1996 dounwind(cxix);
1997
d7507f74
RH
1998 if (CxMULTICALL(&cxstack[cxix])) {
1999 gimme = cxstack[cxix].blk_gimme;
2000 if (gimme == G_VOID)
2001 PL_stack_sp = PL_stack_base;
2002 else if (gimme == G_SCALAR) {
2003 PL_stack_base[1] = *PL_stack_sp;
2004 PL_stack_sp = PL_stack_base + 1;
2005 }
9850bf21 2006 return 0;
d7507f74 2007 }
9850bf21 2008
a0d0e21e 2009 POPBLOCK(cx,newpm);
6b35e009 2010 switch (CxTYPE(cx)) {
a0d0e21e 2011 case CXt_SUB:
f86702cc 2012 popsub2 = TRUE;
f39bc417 2013 retop = cx->blk_sub.retop;
5dd42e15 2014 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2015 break;
2016 case CXt_EVAL:
b45de488
GS
2017 if (!(PL_in_eval & EVAL_KEEPERR))
2018 clear_errsv = TRUE;
a0d0e21e 2019 POPEVAL(cx);
f39bc417 2020 retop = cx->blk_eval.retop;
1d76a5c3
GS
2021 if (CxTRYBLOCK(cx))
2022 break;
067f92a0 2023 lex_end();
748a9306
LW
2024 if (optype == OP_REQUIRE &&
2025 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2026 {
54310121 2027 /* Unassume the success we assumed earlier. */
901017d6 2028 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2029 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2030 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2031 }
a0d0e21e 2032 break;
7766f137
GS
2033 case CXt_FORMAT:
2034 POPFORMAT(cx);
f39bc417 2035 retop = cx->blk_sub.retop;
7766f137 2036 break;
a0d0e21e 2037 default:
cea2e8a9 2038 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2039 }
2040
a1f49e72 2041 TAINT_NOT;
a0d0e21e 2042 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2043 if (MARK < SP) {
2044 if (popsub2) {
a8bba7fa 2045 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2046 if (SvTEMP(TOPs)) {
2047 *++newsp = SvREFCNT_inc(*SP);
2048 FREETMPS;
2049 sv_2mortal(*newsp);
959e3673
GS
2050 }
2051 else {
2052 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2053 FREETMPS;
959e3673
GS
2054 *++newsp = sv_mortalcopy(sv);
2055 SvREFCNT_dec(sv);
a29cdaf0 2056 }
959e3673
GS
2057 }
2058 else
a29cdaf0 2059 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2060 }
2061 else
a29cdaf0 2062 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2063 }
2064 else
3280af22 2065 *++newsp = &PL_sv_undef;
a0d0e21e 2066 }
54310121 2067 else if (gimme == G_ARRAY) {
a1f49e72 2068 while (++MARK <= SP) {
f86702cc
PP
2069 *++newsp = (popsub2 && SvTEMP(*MARK))
2070 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2071 TAINT_NOT; /* Each item is independent */
2072 }
a0d0e21e 2073 }
3280af22 2074 PL_stack_sp = newsp;
a0d0e21e 2075
5dd42e15 2076 LEAVE;
f86702cc
PP
2077 /* Stack values are safe: */
2078 if (popsub2) {
5dd42e15 2079 cxstack_ix--;
b0d9ce38 2080 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2081 }
b0d9ce38 2082 else
c445ea15 2083 sv = NULL;
3280af22 2084 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2085
b0d9ce38 2086 LEAVESUB(sv);
b45de488 2087 if (clear_errsv)
c69006e4 2088 sv_setpvn(ERRSV,"",0);
f39bc417 2089 return retop;
a0d0e21e
LW
2090}
2091
2092PP(pp_last)
2093{
27da23d5 2094 dVAR; dSP;
a0d0e21e 2095 I32 cxix;
c09156bb 2096 register PERL_CONTEXT *cx;
f86702cc 2097 I32 pop2 = 0;
a0d0e21e 2098 I32 gimme;
8772537c 2099 I32 optype;
a0d0e21e
LW
2100 OP *nextop;
2101 SV **newsp;
2102 PMOP *newpm;
a8bba7fa 2103 SV **mark;
c445ea15 2104 SV *sv = NULL;
9d4ba2ae 2105
a0d0e21e 2106
533c011a 2107 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2108 cxix = dopoptoloop(cxstack_ix);
2109 if (cxix < 0)
a651a37d 2110 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2111 }
2112 else {
2113 cxix = dopoptolabel(cPVOP->op_pv);
2114 if (cxix < 0)
cea2e8a9 2115 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2116 }
2117 if (cxix < cxstack_ix)
2118 dounwind(cxix);
2119
2120 POPBLOCK(cx,newpm);
5dd42e15 2121 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2122 mark = newsp;
6b35e009 2123 switch (CxTYPE(cx)) {
a0d0e21e 2124 case CXt_LOOP:
f86702cc 2125 pop2 = CXt_LOOP;
a8bba7fa 2126 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2127 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2128 break;
f86702cc 2129 case CXt_SUB:
f86702cc 2130 pop2 = CXt_SUB;
f39bc417 2131 nextop = cx->blk_sub.retop;
a0d0e21e 2132 break;
f86702cc
PP
2133 case CXt_EVAL:
2134 POPEVAL(cx);
f39bc417 2135 nextop = cx->blk_eval.retop;
a0d0e21e 2136 break;
7766f137
GS
2137 case CXt_FORMAT:
2138 POPFORMAT(cx);
f39bc417 2139 nextop = cx->blk_sub.retop;
7766f137 2140 break;
a0d0e21e 2141 default:
cea2e8a9 2142 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2143 }
2144
a1f49e72 2145 TAINT_NOT;
a0d0e21e 2146 if (gimme == G_SCALAR) {
f86702cc
PP
2147 if (MARK < SP)
2148 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2149 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2150 else
3280af22 2151 *++newsp = &PL_sv_undef;
a0d0e21e 2152 }
54310121 2153 else if (gimme == G_ARRAY) {
a1f49e72 2154 while (++MARK <= SP) {
f86702cc
PP
2155 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2156 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2157 TAINT_NOT; /* Each item is independent */
2158 }
f86702cc
PP
2159 }
2160 SP = newsp;
2161 PUTBACK;
2162
5dd42e15
DM
2163 LEAVE;
2164 cxstack_ix--;
f86702cc
PP
2165 /* Stack values are safe: */
2166 switch (pop2) {
2167 case CXt_LOOP:
a8bba7fa 2168 POPLOOP(cx); /* release loop vars ... */
4fdae800 2169 LEAVE;
f86702cc
PP
2170 break;
2171 case CXt_SUB:
b0d9ce38 2172 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2173 break;
a0d0e21e 2174 }
3280af22 2175 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2176
b0d9ce38 2177 LEAVESUB(sv);
9d4ba2ae
AL
2178 PERL_UNUSED_VAR(optype);
2179 PERL_UNUSED_VAR(gimme);
f86702cc 2180 return nextop;
a0d0e21e
LW
2181}
2182
2183PP(pp_next)
2184{
27da23d5 2185 dVAR;
a0d0e21e 2186 I32 cxix;
c09156bb 2187 register PERL_CONTEXT *cx;
85538317 2188 I32 inner;
a0d0e21e 2189
533c011a 2190 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2191 cxix = dopoptoloop(cxstack_ix);
2192 if (cxix < 0)
a651a37d 2193 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2194 }
2195 else {
2196 cxix = dopoptolabel(cPVOP->op_pv);
2197 if (cxix < 0)
cea2e8a9 2198 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2199 }
2200 if (cxix < cxstack_ix)
2201 dounwind(cxix);
2202
85538317
GS
2203 /* clear off anything above the scope we're re-entering, but
2204 * save the rest until after a possible continue block */
2205 inner = PL_scopestack_ix;
1ba6ee2b 2206 TOPBLOCK(cx);
85538317
GS
2207 if (PL_scopestack_ix < inner)
2208 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2209 PL_curcop = cx->blk_oldcop;
022eaa24 2210 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2211}
2212
2213PP(pp_redo)
2214{
27da23d5 2215 dVAR;
a0d0e21e 2216 I32 cxix;
c09156bb 2217 register PERL_CONTEXT *cx;
a0d0e21e 2218 I32 oldsave;
a034e688 2219 OP* redo_op;
a0d0e21e 2220
533c011a 2221 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2222 cxix = dopoptoloop(cxstack_ix);
2223 if (cxix < 0)
a651a37d 2224 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2225 }
2226 else {
2227 cxix = dopoptolabel(cPVOP->op_pv);
2228 if (cxix < 0)
cea2e8a9 2229 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2230 }
2231 if (cxix < cxstack_ix)
2232 dounwind(cxix);
2233
022eaa24 2234 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2235 if (redo_op->op_type == OP_ENTER) {
2236 /* pop one less context to avoid $x being freed in while (my $x..) */
2237 cxstack_ix++;
2238 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2239 redo_op = redo_op->op_next;
2240 }
2241
a0d0e21e 2242 TOPBLOCK(cx);
3280af22 2243 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2244 LEAVE_SCOPE(oldsave);
936c78b5 2245 FREETMPS;
3a1b2b9e 2246 PL_curcop = cx->blk_oldcop;
a034e688 2247 return redo_op;
a0d0e21e
LW
2248}
2249
0824fdcb 2250STATIC OP *
bfed75c6 2251S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2252{
97aff369 2253 dVAR;
a0d0e21e 2254 OP **ops = opstack;
bfed75c6 2255 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2256
fc36a67e 2257 if (ops >= oplimit)
cea2e8a9 2258 Perl_croak(aTHX_ too_deep);
11343788
MB
2259 if (o->op_type == OP_LEAVE ||
2260 o->op_type == OP_SCOPE ||
2261 o->op_type == OP_LEAVELOOP ||
33d34e4c 2262 o->op_type == OP_LEAVESUB ||
11343788 2263 o->op_type == OP_LEAVETRY)
fc36a67e 2264 {
5dc0d613 2265 *ops++ = cUNOPo->op_first;
fc36a67e 2266 if (ops >= oplimit)
cea2e8a9 2267 Perl_croak(aTHX_ too_deep);
fc36a67e 2268 }
c4aa4e48 2269 *ops = 0;
11343788 2270 if (o->op_flags & OPf_KIDS) {
aec46f14 2271 OP *kid;
a0d0e21e 2272 /* First try all the kids at this level, since that's likeliest. */
11343788 2273 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS
2274 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2275 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW
2276 return kid;
2277 }
11343788 2278 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2279 if (kid == PL_lastgotoprobe)
a0d0e21e 2280 continue;
ed8d0fe2
SM
2281 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2282 if (ops == opstack)
2283 *ops++ = kid;
2284 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2285 ops[-1]->op_type == OP_DBSTATE)
2286 ops[-1] = kid;
2287 else
2288 *ops++ = kid;
2289 }
155aba94 2290 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2291 return o;
a0d0e21e
LW
2292 }
2293 }
c4aa4e48 2294 *ops = 0;
a0d0e21e
LW
2295 return 0;
2296}
2297
a0d0e21e
LW
2298PP(pp_goto)
2299{
27da23d5 2300 dVAR; dSP;
cbbf8932 2301 OP *retop = NULL;
a0d0e21e 2302 I32 ix;
c09156bb 2303 register PERL_CONTEXT *cx;
fc36a67e
PP
2304#define GOTO_DEPTH 64
2305 OP *enterops[GOTO_DEPTH];
cbbf8932 2306 const char *label = NULL;
bfed75c6
AL
2307 const bool do_dump = (PL_op->op_type == OP_DUMP);
2308 static const char must_have_label[] = "goto must have label";
a0d0e21e 2309
533c011a 2310 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2311 SV * const sv = POPs;
a0d0e21e
LW
2312
2313 /* This egregious kludge implements goto &subroutine */
2314 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2315 I32 cxix;
c09156bb 2316 register PERL_CONTEXT *cx;
a0d0e21e
LW
2317 CV* cv = (CV*)SvRV(sv);
2318 SV** mark;
2319 I32 items = 0;
2320 I32 oldsave;
b1464ded 2321 bool reified = 0;
a0d0e21e 2322
e8f7dd13 2323 retry:
4aa0a1f7 2324 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2325 const GV * const gv = CvGV(cv);
e8f7dd13 2326 if (gv) {
7fc63493 2327 GV *autogv;
e8f7dd13
GS
2328 SV *tmpstr;
2329 /* autoloaded stub? */
2330 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2331 goto retry;
2332 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2333 GvNAMELEN(gv), FALSE);
2334 if (autogv && (cv = GvCV(autogv)))
2335 goto retry;
2336 tmpstr = sv_newmortal();
c445ea15 2337 gv_efullname3(tmpstr, gv, NULL);
be2597df 2338 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2339 }
cea2e8a9 2340 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2341 }
2342
a0d0e21e 2343 /* First do some returnish stuff. */
b37c2d43 2344 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2345 FREETMPS;
a0d0e21e
LW
2346 cxix = dopoptosub(cxstack_ix);
2347 if (cxix < 0)
cea2e8a9 2348 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2349 if (cxix < cxstack_ix)
2350 dounwind(cxix);
2351 TOPBLOCK(cx);
2d43a17f 2352 SPAGAIN;
564abe23 2353 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2354 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2355 if (CxREALEVAL(cx))
2356 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2357 else
2358 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2359 }
9850bf21
RH
2360 else if (CxMULTICALL(cx))
2361 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
cc8d50a7 2362 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
d8b46c1b 2363 /* put @_ back onto stack */
a0d0e21e 2364 AV* av = cx->blk_sub.argarray;
bfed75c6 2365
93965878 2366 items = AvFILLp(av) + 1;
a45cdc79
DM
2367 EXTEND(SP, items+1); /* @_ could have been extended. */
2368 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2369 SvREFCNT_dec(GvAV(PL_defgv));
2370 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2371 CLEAR_ARGARRAY(av);
d8b46c1b 2372 /* abandon @_ if it got reified */
62b1ebc2 2373 if (AvREAL(av)) {
b1464ded
DM
2374 reified = 1;
2375 SvREFCNT_dec(av);
d8b46c1b
GS
2376 av = newAV();
2377 av_extend(av, items-1);
11ca45c0 2378 AvREIFY_only(av);
dd2155a4 2379 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2380 }
a0d0e21e 2381 }
aed2304a 2382 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2383 AV* const av = GvAV(PL_defgv);
1fa4e549 2384 items = AvFILLp(av) + 1;
a45cdc79
DM
2385 EXTEND(SP, items+1); /* @_ could have been extended. */
2386 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2387 }
a45cdc79
DM
2388 mark = SP;
2389 SP += items;
6b35e009 2390 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2391 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2392 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2393 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2394 LEAVE_SCOPE(oldsave);
2395
2396 /* Now do some callish stuff. */
2397 SAVETMPS;
5023d17a 2398 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2399 if (CvISXSUB(cv)) {
b37c2d43 2400 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2401 SV **newsp;
2402 I32 gimme;
b1464ded
DM
2403 if (reified) {
2404 I32 index;
2405 for (index=0; index<items; index++)
2406 sv_2mortal(SP[-index]);
2407 }
1fa4e549 2408
b37c2d43
AL
2409 /* XS subs don't have a CxSUB, so pop it */
2410 POPBLOCK(cx, PL_curpm);
2411 /* Push a mark for the start of arglist */
2412 PUSHMARK(mark);
2413 PUTBACK;
2414 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2415 LEAVE;
5eff7df7 2416 return retop;
a0d0e21e
LW
2417 }
2418 else {
b37c2d43 2419 AV* const padlist = CvPADLIST(cv);
6b35e009 2420 if (CxTYPE(cx) == CXt_EVAL) {
3280af22
NIS
2421 PL_in_eval = cx->blk_eval.old_in_eval;
2422 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2423 cx->cx_type = CXt_SUB;
cc8d50a7 2424 cx->blk_sub.hasargs = 0;
b150fb22 2425 }
a0d0e21e 2426 cx->blk_sub.cv = cv;
1a5b3db4 2427 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2428
a0d0e21e
LW
2429 CvDEPTH(cv)++;
2430 if (CvDEPTH(cv) < 2)
74c765eb 2431 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2432 else {
599cee73 2433 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
44a8e56a 2434 sub_crush_depth(cv);
26019298 2435 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2436 }
fd617465
DM
2437 SAVECOMPPAD();
2438 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
cc8d50a7 2439 if (cx->blk_sub.hasargs)
6d4ff0d2 2440 {
b37c2d43 2441 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2442
3280af22 2443 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2444 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2445 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2446 cx->blk_sub.argarray = av;
a0d0e21e
LW
2447
2448 if (items >= AvMAX(av) + 1) {
b37c2d43 2449 SV **ary = AvALLOC(av);
a0d0e21e
LW
2450 if (AvARRAY(av) != ary) {
2451 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2452 AvARRAY(av) = ary;
a0d0e21e
LW
2453 }
2454 if (items >= AvMAX(av) + 1) {
2455 AvMAX(av) = items - 1;
2456 Renew(ary,items+1,SV*);
2457 AvALLOC(av) = ary;
9c6bc640 2458 AvARRAY(av) = ary;
a0d0e21e
LW
2459 }
2460 }
a45cdc79 2461 ++mark;
a0d0e21e 2462 Copy(mark,AvARRAY(av),items,SV*);
93965878 2463 AvFILLp(av) = items - 1;
d8b46c1b 2464 assert(!AvREAL(av));
b1464ded
DM
2465 if (reified) {
2466 /* transfer 'ownership' of refcnts to new @_ */
2467 AvREAL_on(av);
2468 AvREIFY_off(av);
2469 }
a0d0e21e
LW
2470 while (items--) {
2471 if (*mark)
2472 SvTEMP_off(*mark);
2473 mark++;
2474 }
2475 }
491527d0 2476 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2477 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL
2478 if (PERLDB_GOTO) {
2479 CV * const gotocv = get_cv("DB::goto", FALSE);
2480 if (gotocv) {
2481 PUSHMARK( PL_stack_sp );
2482 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2483 PL_stack_sp--;
2484 }
491527d0 2485 }
1ce6579f 2486 }
a0d0e21e
LW
2487 RETURNOP(CvSTART(cv));
2488 }
2489 }
1614b0e3 2490 else {
0510663f 2491 label = SvPV_nolen_const(sv);
1614b0e3 2492 if (!(do_dump || *label))
cea2e8a9 2493 DIE(aTHX_ must_have_label);
1614b0e3 2494 }
a0d0e21e 2495 }
533c011a 2496 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2497 if (! do_dump)
cea2e8a9 2498 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2499 }
2500 else
2501 label = cPVOP->op_pv;
2502
2503 if (label && *label) {
cbbf8932 2504 OP *gotoprobe = NULL;
3b2447bc 2505 bool leaving_eval = FALSE;
33d34e4c 2506 bool in_block = FALSE;
cbbf8932 2507 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2508
2509 /* find label */
2510
d4c19fe8 2511 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2512 *enterops = 0;
2513 for (ix = cxstack_ix; ix >= 0; ix--) {
2514 cx = &cxstack[ix];
6b35e009 2515 switch (CxTYPE(cx)) {
a0d0e21e 2516 case CXt_EVAL:
3b2447bc 2517 leaving_eval = TRUE;
971ecbe6 2518 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2519 gotoprobe = (last_eval_cx ?
2520 last_eval_cx->blk_eval.old_eval_root :
2521 PL_eval_root);
2522 last_eval_cx = cx;
9c5794fe
RH
2523 break;
2524 }
2525 /* else fall through */
a0d0e21e
LW
2526 case CXt_LOOP:
2527 gotoprobe = cx->blk_oldcop->op_sibling;
2528 break;
2529 case CXt_SUBST:
2530 continue;
2531 case CXt_BLOCK:
33d34e4c 2532 if (ix) {
a0d0e21e 2533 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2534 in_block = TRUE;
2535 } else
3280af22 2536 gotoprobe = PL_main_root;
a0d0e21e 2537 break;
b3933176 2538 case CXt_SUB:
9850bf21 2539 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2540 gotoprobe = CvROOT(cx->blk_sub.cv);
2541 break;
2542 }
2543 /* FALL THROUGH */
7766f137 2544 case CXt_FORMAT:
0a753a76 2545 case CXt_NULL:
a651a37d 2546 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2547 default:
2548 if (ix)
cea2e8a9 2549 DIE(aTHX_ "panic: goto");
3280af22 2550 gotoprobe = PL_main_root;
a0d0e21e
LW
2551 break;
2552 }
2b597662
GS
2553 if (gotoprobe) {
2554 retop = dofindlabel(gotoprobe, label,
2555 enterops, enterops + GOTO_DEPTH);
2556 if (retop)
2557 break;
2558 }
3280af22 2559 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2560 }
2561 if (!retop)
cea2e8a9 2562 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2563
3b2447bc
RH
2564 /* if we're leaving an eval, check before we pop any frames
2565 that we're not going to punt, otherwise the error
2566 won't be caught */
2567
2568 if (leaving_eval && *enterops && enterops[1]) {
2569 I32 i;
2570 for (i = 1; enterops[i]; i++)
2571 if (enterops[i]->op_type == OP_ENTERITER)
2572 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2573 }
2574
a0d0e21e
LW
2575 /* pop unwanted frames */
2576
2577 if (ix < cxstack_ix) {
2578 I32 oldsave;
2579
2580 if (ix < 0)
2581 ix = 0;
2582 dounwind(ix);
2583 TOPBLOCK(cx);
3280af22 2584 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2585 LEAVE_SCOPE(oldsave);
2586 }
2587
2588 /* push wanted frames */
2589
748a9306 2590 if (*enterops && enterops[1]) {
0bd48802 2591 OP * const oldop = PL_op;
33d34e4c
AE
2592 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2593 for (; enterops[ix]; ix++) {
533c011a 2594 PL_op = enterops[ix];
84902520
TB
2595 /* Eventually we may want to stack the needed arguments
2596 * for each op. For now, we punt on the hard ones. */
533c011a 2597 if (PL_op->op_type == OP_ENTERITER)
894356b3 2598 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2599 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2600 }
533c011a 2601 PL_op = oldop;
a0d0e21e
LW
2602 }
2603 }
2604
2605 if (do_dump) {
a5f75d66 2606#ifdef VMS
6b88bc9c 2607 if (!retop) retop = PL_main_start;
a5f75d66 2608#endif
3280af22
NIS
2609 PL_restartop = retop;
2610 PL_do_undump = TRUE;
a0d0e21e
LW
2611
2612 my_unexec();
2613
3280af22
NIS
2614 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2615 PL_do_undump = FALSE;
a0d0e21e
LW
2616 }
2617
2618 RETURNOP(retop);
2619}
2620
2621PP(pp_exit)
2622{
97aff369 2623 dVAR;
39644a26 2624 dSP;
a0d0e21e
LW
2625 I32 anum;
2626
2627 if (MAXARG < 1)
2628 anum = 0;
ff0cee69 2629 else {
a0d0e21e 2630 anum = SvIVx(POPs);
d98f61e7
GS
2631#ifdef VMS
2632 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2633 anum = 0;
96e176bf 2634 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2635#endif
2636 }
cc3604b1 2637 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2638#ifdef PERL_MAD
2639 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2640 if (anum || !(PL_minus_c && PL_madskills))
2641 my_exit(anum);
2642#else
a0d0e21e 2643 my_exit(anum);
81d86705 2644#endif
3280af22 2645 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2646 RETURN;
2647}
2648
a0d0e21e
LW
2649/* Eval. */
2650
0824fdcb 2651STATIC void
cea2e8a9 2652S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2653{
504618e9 2654 const char *s = SvPVX_const(sv);
890ce7af 2655 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2656 I32 line = 1;
a0d0e21e
LW
2657
2658 while (s && s < send) {
f54cb97a 2659 const char *t;
b9f83d2f 2660 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2661
a0d0e21e
LW
2662 t = strchr(s, '\n');
2663 if (t)
2664 t++;
2665 else
2666 t = send;
2667
2668 sv_setpvn(tmpstr, s, t - s);
2669 av_store(array, line++, tmpstr);
2670 s = t;
2671 }
2672}
2673
901017d6 2674STATIC void
14dd3ad8
GS
2675S_docatch_body(pTHX)
2676{
97aff369 2677 dVAR;
cea2e8a9 2678 CALLRUNOPS(aTHX);
901017d6 2679 return;
312caa8e
CS
2680}
2681
0824fdcb 2682STATIC OP *
cea2e8a9 2683S_docatch(pTHX_ OP *o)
1e422769 2684{
97aff369 2685 dVAR;
6224f72b 2686 int ret;
06b5626a 2687 OP * const oldop = PL_op;
db36c5a1 2688 dJMPENV;
1e422769 2689
1e422769 2690#ifdef DEBUGGING
54310121 2691 assert(CATCH_GET == TRUE);
1e422769 2692#endif
312caa8e 2693 PL_op = o;
8bffa5f8 2694
14dd3ad8 2695 JMPENV_PUSH(ret);
6224f72b 2696 switch (ret) {
312caa8e 2697 case 0:
abd70938
DM
2698 assert(cxstack_ix >= 0);
2699 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2700 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8
GS
2701 redo_body:
2702 docatch_body();
312caa8e
CS
2703 break;
2704 case 3:
8bffa5f8 2705 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2706
2707 /* NB XXX we rely on the old popped CxEVAL still being at the top
2708 * of the stack; the way die_where() currently works, this
2709 * assumption is valid. In theory The cur_top_env value should be
2710 * returned in another global, the way retop (aka PL_restartop)
2711 * is. */
2712 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2713
2714 if (PL_restartop
2715 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2716 {
312caa8e
CS
2717 PL_op = PL_restartop;
2718 PL_restartop = 0;
2719 goto redo_body;
2720 }
2721 /* FALL THROUGH */
2722 default:
14dd3ad8 2723 JMPENV_POP;
533c011a 2724 PL_op = oldop;
6224f72b 2725 JMPENV_JUMP(ret);
1e422769 2726 /* NOTREACHED */
1e422769 2727 }
14dd3ad8 2728 JMPENV_POP;
533c011a 2729 PL_op = oldop;
5f66b61c 2730 return NULL;
1e422769
PP
2731}
2732
c277df42 2733OP *
bfed75c6 2734Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2735/* sv Text to convert to OP tree. */
2736/* startop op_free() this to undo. */
2737/* code Short string id of the caller. */
2738{
f7997f86 2739 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2740 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2741 PERL_CONTEXT *cx;
2742 SV **newsp;
b094c71d 2743 I32 gimme = G_VOID;
c277df42
IZ
2744 I32 optype;
2745 OP dummy;
155aba94 2746 OP *rop;
83ee9e09
GS
2747 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2748 char *tmpbuf = tbuf;
c277df42 2749 char *safestr;
a3985cdc 2750 int runtime;
601f1833 2751 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2752 STRLEN len;
c277df42
IZ
2753
2754 ENTER;
2755 lex_start(sv);
2756 SAVETMPS;
2757 /* switch to eval mode */
2758
923e4eb5 2759 if (IN_PERL_COMPILETIME) {
f4dd75d9 2760 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2761 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2762 }
83ee9e09 2763 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2764 SV * const sv = sv_newmortal();
83ee9e09
GS
2765 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2766 code, (unsigned long)++PL_evalseq,
2767 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2768 tmpbuf = SvPVX(sv);
fc009855 2769 len = SvCUR(sv);
83ee9e09
GS
2770 }
2771 else
d9fad198
JH
2772 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2773 (unsigned long)++PL_evalseq);
f4dd75d9 2774 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2775 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2776 SAVECOPLINE(&PL_compiling);
57843af0 2777 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2778 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2779 deleting the eval's FILEGV from the stash before gv_check() runs
2780 (i.e. before run-time proper). To work around the coredump that
2781 ensues, we always turn GvMULTI_on for any globals that were
2782 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2783 safestr = savepvn(tmpbuf, len);
2784 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2785 SAVEHINTS();
d1ca3daa 2786#ifdef OP_IN_REGISTER
6b88bc9c 2787 PL_opsave = op;
d1ca3daa 2788#else
7766f137 2789 SAVEVPTR(PL_op);
d1ca3daa 2790#endif
c277df42 2791
a3985cdc 2792 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2793 runtime = IN_PERL_RUNTIME;
a3985cdc 2794 if (runtime)
d819b83a 2795 runcv = find_runcv(NULL);
a3985cdc 2796
533c011a 2797 PL_op = &dummy;
13b51b79 2798 PL_op->op_type = OP_ENTEREVAL;
533c011a 2799 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2800 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
a0714e2c 2801 PUSHEVAL(cx, 0, NULL);
a3985cdc
DM
2802
2803 if (runtime)
2804 rop = doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
2805 else
2806 rop = doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2807 POPBLOCK(cx,PL_curpm);
e84b9f1f 2808 POPEVAL(cx);
c277df42
IZ
2809
2810 (*startop)->op_type = OP_NULL;
22c35a8c 2811 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2812 lex_end();
f3548bdc 2813 /* XXX DAPM do this properly one year */
b37c2d43 2814 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2815 LEAVE;
923e4eb5 2816 if (IN_PERL_COMPILETIME)
623e6609 2817 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2818#ifdef OP_IN_REGISTER
6b88bc9c 2819 op = PL_opsave;
d1ca3daa 2820#endif
9d4ba2ae
AL
2821 PERL_UNUSED_VAR(newsp);
2822 PERL_UNUSED_VAR(optype);
2823
c277df42
IZ
2824 return rop;
2825}
2826
a3985cdc
DM
2827
2828/*
2829=for apidoc find_runcv
2830
2831Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2832If db_seqp is non_null, skip CVs that are in the DB package and populate
2833*db_seqp with the cop sequence number at the point that the DB:: code was
2834entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2835than in the scope of the debugger itself).
a3985cdc
DM
2836
2837=cut
2838*/
2839
2840CV*
d819b83a 2841Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2842{
97aff369 2843 dVAR;
a3985cdc 2844 PERL_SI *si;
a3985cdc 2845
d819b83a
DM
2846 if (db_seqp)
2847 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2848 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2849 I32 ix;
a3985cdc 2850 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2851 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2852 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2853 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2854 /* skip DB:: code */
2855 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2856 *db_seqp = cx->blk_oldcop->cop_seq;
2857 continue;
2858 }
2859 return cv;
2860 }
a3985cdc
DM
2861 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2862 return PL_compcv;
2863 }
2864 }
2865 return PL_main_cv;
2866}
2867
2868
2869/* Compile a require/do, an eval '', or a /(?{...})/.
2870 * In the last case, startop is non-null, and contains the address of
2871 * a pointer that should be set to the just-compiled code.
2872 * outside is the lexically enclosing CV (if any) that invoked us.
2873 */
2874
0824fdcb 2875STATIC OP *
a3985cdc 2876S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2877{
27da23d5 2878 dVAR; dSP;
46c461b5 2879 OP * const saveop = PL_op;
a0d0e21e 2880
6dc8a9e4
IZ
2881 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2882 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2883 : EVAL_INEVAL);
a0d0e21e 2884
1ce6579f
PP
2885 PUSHMARK(SP);
2886
3280af22 2887 SAVESPTR(PL_compcv);
b9f83d2f 2888 PL_compcv = (CV*)newSV_type(SVt_PVCV);
1aff0e91 2889 CvEVAL_on(PL_compcv);
2090ab20
JH
2890 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2891 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2892
a3985cdc 2893 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2894 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2895
dd2155a4 2896 /* set up a scratch pad */
a0d0e21e 2897
dd2155a4 2898 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2899 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2900
07055b4c 2901
81d86705
NC
2902 if (!PL_madskills)
2903 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2904
a0d0e21e
LW
2905 /* make sure we compile in the right package */
2906
ed094faf 2907 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2908 SAVESPTR(PL_curstash);
ed094faf 2909 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2910 }
3c10abe3 2911 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
2912 SAVESPTR(PL_beginav);
2913 PL_beginav = newAV();
2914 SAVEFREESV(PL_beginav);
3c10abe3
AG
2915 SAVESPTR(PL_unitcheckav);
2916 PL_unitcheckav = newAV();
2917 SAVEFREESV(PL_unitcheckav);
24944567 2918 SAVEI32(PL_error_count);
a0d0e21e 2919
81d86705
NC
2920#ifdef PERL_MAD
2921 SAVEI32(PL_madskills);
2922 PL_madskills = 0;
2923#endif
2924
a0d0e21e
LW
2925 /* try to compile it */
2926
5f66b61c 2927 PL_eval_root = NULL;
3280af22
NIS
2928 PL_error_count = 0;
2929 PL_curcop = &PL_compiling;
fc15ae8f 2930 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2931 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2932 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2933 else
c69006e4 2934 sv_setpvn(ERRSV,"",0);
3280af22 2935 if (yyparse() || PL_error_count || !PL_eval_root) {
0c58d367 2936 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2937 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2938 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2939 const char *msg;
bfed75c6 2940
533c011a 2941 PL_op = saveop;
3280af22
NIS
2942 if (PL_eval_root) {
2943 op_free(PL_eval_root);
5f66b61c 2944 PL_eval_root = NULL;
a0d0e21e 2945 }
3280af22 2946 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2947 if (!startop) {
3280af22 2948 POPBLOCK(cx,PL_curpm);
c277df42 2949 POPEVAL(cx);
c277df42 2950 }
a0d0e21e
LW
2951 lex_end();
2952 LEAVE;
9d4ba2ae
AL
2953
2954 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 2955 if (optype == OP_REQUIRE) {
b464bac0 2956 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 2957 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 2958 &PL_sv_undef, 0);
5a844595
GS
2959 DIE(aTHX_ "%sCompilation failed in require",
2960 *msg ? msg : "Unknown error\n");
2961 }
2962 else if (startop) {
3280af22 2963 POPBLOCK(cx,PL_curpm);
c277df42 2964 POPEVAL(cx);
5a844595
GS
2965 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2966 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 2967 }
9d7f88dd 2968 else {
9d7f88dd 2969 if (!*msg) {
6502358f 2970 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
2971 }
2972 }
9d4ba2ae 2973 PERL_UNUSED_VAR(newsp);
a0d0e21e
LW
2974 RETPUSHUNDEF;
2975 }
57843af0 2976 CopLINE_set(&PL_compiling, 0);
c277df42 2977 if (startop) {
3280af22 2978 *startop = PL_eval_root;
c277df42 2979 } else
3280af22 2980 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
2981
2982 /* Set the context for this new optree.
2983 * If the last op is an OP_REQUIRE, force scalar context.
2984 * Otherwise, propagate the context from the eval(). */
2985 if (PL_eval_root->op_type == OP_LEAVEEVAL
2986 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
2987 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
2988 == OP_REQUIRE)
2989 scalar(PL_eval_root);
2990 else if (gimme & G_VOID)
3280af22 2991 scalarvoid(PL_eval_root);
54310121 2992 else if (gimme & G_ARRAY)
3280af22 2993 list(PL_eval_root);
a0d0e21e 2994 else
3280af22 2995 scalar(PL_eval_root);
a0d0e21e
LW
2996
2997 DEBUG_x(dump_eval());
2998
55497cff 2999 /* Register with debugger: */
6482a30d 3000 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 3001 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP
3002 if (cv) {
3003 dSP;
924508f0 3004 PUSHMARK(SP);
cc49e20b 3005 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 3006 PUTBACK;
864dbfa3 3007 call_sv((SV*)cv, G_DISCARD);
55497cff
PP
3008 }
3009 }
3010
3c10abe3
AG
3011 if (PL_unitcheckav)
3012 call_list(PL_scopestack_ix, PL_unitcheckav);
3013
a0d0e21e
LW
3014 /* compiled okay, so do it */
3015
3280af22
NIS
3016 CvDEPTH(PL_compcv) = 1;
3017 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3018 PL_op = saveop; /* The caller may need it. */
6dc8a9e4 3019 PL_lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3020
3280af22 3021 RETURNOP(PL_eval_start);
a0d0e21e
LW
3022}
3023
a6c40364 3024STATIC PerlIO *
74d5ed12 3025S_check_type_and_open(pTHX_ const char *name, const char *mode)
ce8abf5f
SP
3026{
3027 Stat_t st;
c445ea15 3028 const int st_rc = PerlLIO_stat(name, &st);
df528165 3029
6b845e56 3030 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3031 return NULL;
ce8abf5f
SP
3032 }
3033
ce8abf5f
SP
3034 return PerlIO_open(name, mode);
3035}
3036
3037STATIC PerlIO *
7925835c 3038S_doopen_pm(pTHX_ const char *name, const char *mode)
b295d113 3039{
7925835c 3040#ifndef PERL_DISABLE_PMC
f54cb97a 3041 const STRLEN namelen = strlen(name);
b295d113
TH
3042 PerlIO *fp;
3043
7894fbab 3044 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
9d4ba2ae 3045 SV * const pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
349d4f2f 3046 const char * const pmc = SvPV_nolen_const(pmcsv);
a6c40364
GS
3047 Stat_t pmcstat;
3048 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
85e8f315 3049 fp = check_type_and_open(name, mode);
a6c40364
GS
3050 }
3051 else {
a91233bf 3052 fp = check_type_and_open(pmc, mode);
b295d113 3053 }
a6c40364
GS
3054 SvREFCNT_dec(pmcsv);
3055 }
3056 else {
85e8f315 3057 fp = check_type_and_open(name, mode);
b295d113 3058 }
b295d113 3059 return fp;
7925835c 3060#else
85e8f315 3061 return check_type_and_open(name, mode);
7925835c 3062#endif /* !PERL_DISABLE_PMC */
b295d113
TH
3063}
3064
a0d0e21e
LW
3065PP(pp_require)
3066{
27da23d5 3067 dVAR; dSP;
c09156bb 3068 register PERL_CONTEXT *cx;
a0d0e21e 3069 SV *sv;
5c144d81 3070 const char *name;
6132ea6c 3071 STRLEN len;
c445ea15
AL
3072 const char *tryname = NULL;
3073 SV *namesv = NULL;
f54cb97a 3074 const I32 gimme = GIMME_V;
bbed91b5 3075 int filter_has_file = 0;
c445ea15 3076 PerlIO *tryrsfp = NULL;
34113e50 3077 SV *filter_cache = NULL;
c445ea15
AL
3078 SV *filter_state = NULL;
3079 SV *filter_sub = NULL;
3080 SV *hook_sv = NULL;
6ec9efec
JH
3081 SV *encoding;
3082 OP *op;
a0d0e21e
LW
3083
3084 sv = POPs;
d7aa5382
JP
3085 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
3086 if ( SvVOK(sv) && ckWARN(WARN_PORTABLE) ) /* require v5.6.1 */
9014280d 3087 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
e3407aba 3088 "v-string in use/require non-portable");
d7aa5382
JP
3089
3090 sv = new_version(sv);
3091 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3092 upg_version(PL_patchlevel, TRUE);
149c1637 3093 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3094 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3095 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3096 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3097 }
3098 else {
3099 if ( vcmp(sv,PL_patchlevel) > 0 )
3100 DIE(aTHX_ "Perl %"SVf" required--this is only %"SVf", stopped",
be2597df 3101 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647 3102 }
d7aa5382 3103
7dfde25d
RGS
3104 /* If we request a version >= 5.9.5, load feature.pm with the
3105 * feature bundle that corresponds to the required version.
3106 * We do this only with use, not require. */
ac0e6a2f 3107 if (PL_compcv && vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3108 SV *const importsv = vnormal(sv);
3109 *SvPVX_mutable(importsv) = ':';
3110 ENTER;
3111 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3112 LEAVE;
3113 }
3114
3115 RETPUSHYES;
a0d0e21e 3116 }
5c144d81 3117 name = SvPV_const(sv, len);
6132ea6c 3118 if (!(name && len > 0 && *name))
cea2e8a9 3119 DIE(aTHX_ "Null filename used");
4633a7c4 3120 TAINT_PROPER("require");
44f8325f 3121 if (PL_op->op_type == OP_REQUIRE) {
0bd48802 3122 SV * const * const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
44f8325f
AL
3123 if ( svp ) {
3124 if (*svp != &PL_sv_undef)
3125 RETPUSHYES;
3126 else
3127 DIE(aTHX_ "Compilation failed in require");
3128 }
4d8b06f1 3129 }
a0d0e21e
LW
3130
3131 /* prepare to compile file */
3132
be4b629d 3133 if (path_is_absolute(name)) {
46fc3d4c 3134 tryname = name;
7925835c 3135 tryrsfp = doopen_pm(name,PERL_SCRIPT_MODE);
bf4acbe4 3136 }
67627c52
JH
3137#ifdef MACOS_TRADITIONAL
3138 if (!tryrsfp) {
3139 char newname[256];
3140
3141 MacPerl_CanonDir(name, newname, 1);
3142 if (path_is_absolute(newname)) {
3143 tryname = newname;
7925835c 3144 tryrsfp = doopen_pm(newname,PERL_SCRIPT_MODE);
67627c52
JH
3145 }
3146 }
3147#endif
be4b629d 3148 if (!tryrsfp) {
44f8325f 3149 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3150 I32 i;
748a9306 3151#ifdef VMS
46fc3d4c 3152 char *unixname;
c445ea15 3153 if ((unixname = tounixspec(name, NULL)) != NULL)
46fc3d4c
PP
3154#endif
3155 {
561b68a9 3156 namesv = newSV(0);
46fc3d4c 3157 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3158 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3159
c38a6530
RD
3160 if (SvTIED_mg((SV*)ar, PERL_MAGIC_tied))
3161 mg_get(dirsv);
bbed91b5
KF
3162 if (SvROK(dirsv)) {
3163 int count;
a3b58a99 3164 SV **svp;
bbed91b5
KF
3165 SV *loader = dirsv;
3166
e14e2dc8
NC
3167 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3168 && !sv_isobject(loader))
3169 {
bbed91b5
KF
3170 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3171 }
3172
b900a521 3173 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3174 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3175 tryname = SvPVX_const(namesv);
c445ea15 3176 tryrsfp = NULL;
bbed91b5
KF
3177
3178 ENTER;
3179 SAVETMPS;
3180 EXTEND(SP, 2);
3181
3182 PUSHMARK(SP);
3183 PUSHs(dirsv);
3184 PUSHs(sv);
3185 PUTBACK;
e982885c
NC
3186 if (sv_isobject(loader))
3187 count = call_method("INC", G_ARRAY);
3188 else
3189 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3190 SPAGAIN;
3191
a3b58a99
RGS
3192 /* Adjust file name if the hook has set an %INC entry */
3193 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3194 if (svp)
3195 tryname = SvPVX_const(*svp);
3196
bbed91b5
KF
3197 if (count > 0) {
3198 int i = 0;
3199 SV *arg;
3200
3201 SP -= count - 1;
3202 arg = SP[i++];
3203
34113e50
NC
3204 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3205 && !isGV_with_GP(SvRV(arg))) {
3206 filter_cache = SvRV(arg);
74c765eb 3207 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3208
3209 if (i < count) {
3210 arg = SP[i++];
3211 }
3212 }
3213
bbed91b5
KF
3214 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3215 arg = SvRV(arg);
3216 }
3217
3218 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3219 IO * const io = GvIO((GV *)arg);
bbed91b5
KF
3220
3221 ++filter_has_file;
3222
3223 if (io) {
3224 tryrsfp = IoIFP(io);
0f7de14d
NC
3225 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3226 PerlIO_close(IoOFP(io));
bbed91b5 3227 }
0f7de14d
NC
3228 IoIFP(io) = NULL;
3229 IoOFP(io) = NULL;
bbed91b5
KF
3230 }
3231
3232 if (i < count) {
3233 arg = SP[i++];
3234 }
3235 }
3236
3237 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3238 filter_sub = arg;
74c765eb 3239 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF
3240
3241 if (i < count) {
3242 filter_state = SP[i];
b37c2d43 3243 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3244 }
34113e50 3245 }
bbed91b5 3246
34113e50
NC
3247 if (!tryrsfp && (filter_cache || filter_sub)) {
3248 tryrsfp = PerlIO_open(BIT_BUCKET,
3249 PERL_SCRIPT_MODE);
bbed91b5 3250 }
1d06aecd 3251 SP--;
bbed91b5
KF
3252 }
3253
3254 PUTBACK;
3255 FREETMPS;
3256 LEAVE;
3257
3258 if (tryrsfp) {
89ccab8c 3259 hook_sv = dirsv;
bbed91b5
KF
3260 break;
3261 }
3262
3263 filter_has_file = 0;
34113e50
NC
3264 if (filter_cache) {
3265 SvREFCNT_dec(filter_cache);
3266 filter_cache = NULL;
3267 }
bbed91b5
KF
3268 if (filter_state) {
3269 SvREFCNT_dec(filter_state);
c445ea15 3270 filter_state = NULL;
bbed91b5
KF
3271 }
3272 if (filter_sub) {
3273 SvREFCNT_dec(filter_sub);
c445ea15 3274 filter_sub = NULL;
bbed91b5
KF
3275 }
3276 }
3277 else {
be4b629d
CN
3278 if (!path_is_absolute(name)
3279#ifdef MACOS_TRADITIONAL
3280 /* We consider paths of the form :a:b ambiguous and interpret them first
3281 as global then as local
3282 */
3283 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3284#endif
3285 ) {
0510663f 3286 const char *dir = SvPVx_nolen_const(dirsv);
bf4acbe4 3287#ifdef MACOS_TRADITIONAL
67627c52
JH
3288 char buf1[256];
3289 char buf2[256];
3290
3291 MacPerl_CanonDir(name, buf2, 1);
3292 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3293#else
27da23d5 3294# ifdef VMS
bbed91b5 3295 char *unixdir;
c445ea15 3296 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF
3297 continue;
3298 sv_setpv(namesv, unixdir);
3299 sv_catpv(namesv, unixname);
27da23d5 3300# else
a0fd4948 3301# ifdef __SYMBIAN32__
27da23d5
JH
3302 if (PL_origfilename[0] &&
3303 PL_origfilename[1] == ':' &&
3304 !(dir[0] && dir[1] == ':'))
3305 Perl_sv_setpvf(aTHX_ namesv,
3306 "%c:%s\\%s",
3307 PL_origfilename[0],
3308 dir, name);
3309 else
3310 Perl_sv_setpvf(aTHX_ namesv,
3311 "%s\\%s",
3312 dir, name);
3313# else
bbed91b5 3314 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
27da23d5
JH
3315# endif
3316# endif
bf4acbe4 3317#endif
bbed91b5 3318 TAINT_PROPER("require");
349d4f2f 3319 tryname = SvPVX_const(namesv);
7925835c 3320 tryrsfp = doopen_pm(tryname, PERL_SCRIPT_MODE);
bbed91b5
KF
3321 if (tryrsfp) {
3322 if (tryname[0] == '.' && tryname[1] == '/')
3323 tryname += 2;
3324 break;
3325 }
ff806af2
DM
3326 else if (errno == EMFILE)
3327 /* no point in trying other paths if out of handles */
3328 break;
be4b629d 3329 }
46fc3d4c 3330 }
a0d0e21e
LW
3331 }
3332 }
3333 }
f4dd75d9 3334 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3335 CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
46fc3d4c 3336 SvREFCNT_dec(namesv);
a0d0e21e 3337 if (!tryrsfp) {
533c011a 3338 if (PL_op->op_type == OP_REQUIRE) {
5c144d81 3339 const char *msgstr = name;
e31de809 3340 if(errno == EMFILE) {
b9b739dc
NC
3341 SV * const msg
3342 = sv_2mortal(Perl_newSVpvf(aTHX_ "%s: %s", msgstr,
3343 Strerror(errno)));
349d4f2f 3344 msgstr = SvPV_nolen_const(msg);
e31de809
SP
3345 } else {
3346 if (namesv) { /* did we lookup @INC? */
44f8325f 3347 AV * const ar = GvAVn(PL_incgv);
e31de809 3348 I32 i;
b8f04b1b
NC
3349 SV * const msg = sv_2mortal(Perl_newSVpvf(aTHX_
3350 "%s in @INC%s%s (@INC contains:",
3351 msgstr,
3352 (instr(msgstr, ".h ")
3353 ? " (change .h to .ph maybe?)" : ""),
3354 (instr(msgstr, ".ph ")
3355 ? " (did you run h2ph?)" : "")
3356 ));
3357
e31de809 3358 for (i = 0; i <= AvFILL(ar); i++) {
396482e1 3359 sv_catpvs(msg, " ");
b8f04b1b 3360 sv_catsv(msg, *av_fetch(ar, i, TRUE));
e31de809 3361 }
396482e1 3362 sv_catpvs(msg, ")");
e31de809
SP
3363 msgstr = SvPV_nolen_const(msg);
3364 }
2683423c 3365 }
ea071790 3366 DIE(aTHX_ "Can't locate %s", msgstr);
a0d0e21e
LW
3367 }
3368
3369 RETPUSHUNDEF;
3370 }
d8bfb8bd 3371 else
93189314 3372 SETERRNO(0, SS_NORMAL);
a0d0e21e
LW
3373
3374 /* Assume success here to prevent recursive requirement. */
238d24b4 3375 /* name is never assigned to again, so len is still strlen(name) */
d3a4e64e 3376 /* Check whether a hook in @INC has already filled %INC */
44f8325f
AL
3377 if (!hook_sv) {
3378 (void)hv_store(GvHVn(PL_incgv), name, len, newSVpv(CopFILE(&PL_compiling),0),0);
3379 } else {
3380 SV** const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3381 if (!svp)
b37c2d43 3382 (void)hv_store(GvHVn(PL_incgv), name, len, SvREFCNT_inc_simple(hook_sv), 0 );
d3a4e64e 3383 }
a0d0e21e
LW
3384
3385 ENTER;
3386 SAVETMPS;
10efb74f 3387 lex_start(NULL);
b9d12d37 3388 SAVEGENERICSV(PL_rsfp_filters);
7d49f689 3389 PL_rsfp_filters = NULL;
e50aee73 3390
3280af22 3391 PL_rsfp = tryrsfp;
b3ac6de7 3392 SAVEHINTS();
3280af22 3393 PL_hints = 0;
68da3b2f 3394 SAVECOMPILEWARNINGS();
0453d815 3395 if (PL_dowarn & G_WARN_ALL_ON)
d3a7d8c7 3396 PL_compiling.cop_warnings = pWARN_ALL ;
0453d815 3397 else if (PL_dowarn & G_WARN_ALL_OFF)
d3a7d8c7 3398 PL_compiling.cop_warnings = pWARN_NONE ;
ac27b0f5 3399 else
d3a7d8c7 3400 PL_compiling.cop_warnings = pWARN_STD ;
a0d0e21e 3401
34113e50 3402 if (filter_sub || filter_cache) {
c445ea15 3403 SV * const datasv = filter_add(S_run_user_filter, NULL);
bbed91b5 3404 IoLINES(datasv) = filter_has_file;
bbed91b5
KF
3405 IoTOP_GV(datasv) = (GV *)filter_state;
3406 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
34113e50 3407 IoFMT_GV(datasv) = (GV *)filter_cache;
bbed91b5
KF
3408 }
3409
3410 /* switch to eval mode */
a0d0e21e <