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As PL_hinthv is actually tied, need to call SvSETMAGIC() after the
[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
94fcd414
NC
41#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
42
a0d0e21e
LW
43PP(pp_wantarray)
44{
97aff369 45 dVAR;
39644a26 46 dSP;
a0d0e21e
LW
47 I32 cxix;
48 EXTEND(SP, 1);
49
50 cxix = dopoptosub(cxstack_ix);
51 if (cxix < 0)
52 RETPUSHUNDEF;
53
54310121
PP
54 switch (cxstack[cxix].blk_gimme) {
55 case G_ARRAY:
a0d0e21e 56 RETPUSHYES;
54310121 57 case G_SCALAR:
a0d0e21e 58 RETPUSHNO;
54310121
PP
59 default:
60 RETPUSHUNDEF;
61 }
a0d0e21e
LW
62}
63
2cd61cdb
IZ
64PP(pp_regcreset)
65{
97aff369 66 dVAR;
2cd61cdb
IZ
67 /* XXXX Should store the old value to allow for tie/overload - and
68 restore in regcomp, where marked with XXXX. */
3280af22 69 PL_reginterp_cnt = 0;
0b4182de 70 TAINT_NOT;
2cd61cdb
IZ
71 return NORMAL;
72}
73
b3eb6a9b
GS
74PP(pp_regcomp)
75{
97aff369 76 dVAR;
39644a26 77 dSP;
a0d0e21e 78 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 79 SV *tmpstr;
4608196e 80 MAGIC *mg = NULL;
c737faaf 81 regexp * re;
bfed75c6 82
4b5a0d1c 83 /* prevent recompiling under /o and ithreads. */
3db8f154 84#if defined(USE_ITHREADS)
131b3ad0
DM
85 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
86 if (PL_op->op_flags & OPf_STACKED) {
87 dMARK;
88 SP = MARK;
89 }
90 else
91 (void)POPs;
92 RETURN;
93 }
513629ba 94#endif
131b3ad0
DM
95 if (PL_op->op_flags & OPf_STACKED) {
96 /* multiple args; concatentate them */
97 dMARK; dORIGMARK;
98 tmpstr = PAD_SV(ARGTARG);
99 sv_setpvn(tmpstr, "", 0);
100 while (++MARK <= SP) {
101 if (PL_amagic_generation) {
102 SV *sv;
103 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
104 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
105 {
106 sv_setsv(tmpstr, sv);
107 continue;
108 }
109 }
110 sv_catsv(tmpstr, *MARK);
111 }
112 SvSETMAGIC(tmpstr);
113 SP = ORIGMARK;
114 }
115 else
116 tmpstr = POPs;
513629ba 117
b3eb6a9b 118 if (SvROK(tmpstr)) {
d8f6592e 119 SV * const sv = SvRV(tmpstr);
c277df42 120 if(SvMAGICAL(sv))
14befaf4 121 mg = mg_find(sv, PERL_MAGIC_qr);
c277df42 122 }
b3eb6a9b 123 if (mg) {
28d8d7f4 124 regexp * const re = reg_temp_copy((regexp *)mg->mg_obj);
aaa362c4 125 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 126 PM_SETRE(pm, re);
c277df42
IZ
127 }
128 else {
e62f0680 129 STRLEN len;
3ab4a224 130 const char *t = SvOK(tmpstr) ? SvPV_const(tmpstr, len) : "";
c737faaf 131 re = PM_GETRE(pm);
c277df42 132
20408e3c 133 /* Check against the last compiled regexp. */
d8f6592e
AL
134 if (!re || !re->precomp || re->prelen != (I32)len ||
135 memNE(re->precomp, t, len))
85aff577 136 {
664e119d 137 const regexp_engine *eng = re ? re->engine : NULL;
c737faaf 138 U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME;
d8f6592e
AL
139 if (re) {
140 ReREFCNT_dec(re);
4608196e 141 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
1e2e3d02
YO
142 } else if (PL_curcop->cop_hints_hash) {
143 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
144 "regcomp", 7, 0, 0);
145 if (ptr && SvIOK(ptr) && SvIV(ptr))
146 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 147 }
664e119d 148
533c011a 149 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 150 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 151
84e09d5e 152 if (DO_UTF8(tmpstr))
c737faaf
YO
153 pm_flags |= RXf_UTF8;
154
3ab4a224
AB
155 if (eng)
156 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
157 else
158 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 159
f86aaa29 160 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 161 inside tie/overload accessors. */
c277df42 162 }
4633a7c4 163 }
c737faaf
YO
164
165 re = PM_GETRE(pm);
a0d0e21e 166
72311751 167#ifndef INCOMPLETE_TAINTS
3280af22
NIS
168 if (PL_tainting) {
169 if (PL_tainted)
c737faaf 170 re->extflags |= RXf_TAINTED;
72311751 171 else
c737faaf 172 re->extflags &= ~RXf_TAINTED;
72311751
GS
173 }
174#endif
175
aaa362c4 176 if (!PM_GETRE(pm)->prelen && PL_curpm)
3280af22 177 pm = PL_curpm;
a0d0e21e 178
c737faaf
YO
179
180#if !defined(USE_ITHREADS)
181 /* can't change the optree at runtime either */
182 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 183 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 184 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 185 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 186 }
c737faaf 187#endif
a0d0e21e
LW
188 RETURN;
189}
190
191PP(pp_substcont)
192{
97aff369 193 dVAR;
39644a26 194 dSP;
c09156bb 195 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
196 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
197 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
198 register char *s = cx->sb_s;
199 register char *m = cx->sb_m;
200 char *orig = cx->sb_orig;
901017d6 201 register REGEXP * const rx = cx->sb_rx;
c445ea15 202 SV *nsv = NULL;
988e6e7e
AE
203 REGEXP *old = PM_GETRE(pm);
204 if(old != rx) {
bfed75c6 205 if(old)
988e6e7e 206 ReREFCNT_dec(old);
e22ae1e2 207 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
208 }
209
d9f97599 210 rxres_restore(&cx->sb_rxres, rx);
01b35787 211 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 212
a0d0e21e 213 if (cx->sb_iters++) {
a3b680e6 214 const I32 saviters = cx->sb_iters;
a0d0e21e 215 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 216 DIE(aTHX_ "Substitution loop");
a0d0e21e 217
48c036b1
GS
218 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
219 cx->sb_rxtainted |= 2;
a0d0e21e 220 sv_catsv(dstr, POPs);
8ff629d9 221 FREETMPS; /* Prevent excess tmp stack */
a0d0e21e
LW
222
223 /* Are we done */
f9f4320a 224 if (cx->sb_once || !CALLREGEXEC(rx, s, cx->sb_strend, orig,
9661b544 225 s == m, cx->sb_targ, NULL,
22e551b9 226 ((cx->sb_rflags & REXEC_COPY_STR)
cf93c79d
IZ
227 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
228 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 229 {
823a54a3 230 SV * const targ = cx->sb_targ;
748a9306 231
078c425b
JH
232 assert(cx->sb_strend >= s);
233 if(cx->sb_strend > s) {
234 if (DO_UTF8(dstr) && !SvUTF8(targ))
235 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
236 else
237 sv_catpvn(dstr, s, cx->sb_strend - s);
238 }
48c036b1 239 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 240
f8c7b90f 241#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
242 if (SvIsCOW(targ)) {
243 sv_force_normal_flags(targ, SV_COW_DROP_PV);
244 } else
245#endif
246 {
8bd4d4c5 247 SvPV_free(targ);
ed252734 248 }
f880fe2f 249 SvPV_set(targ, SvPVX(dstr));
748a9306
LW
250 SvCUR_set(targ, SvCUR(dstr));
251 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH
252 if (DO_UTF8(dstr))
253 SvUTF8_on(targ);
6136c704 254 SvPV_set(dstr, NULL);
48c036b1
GS
255
256 TAINT_IF(cx->sb_rxtainted & 1);
22e13caa 257 PUSHs(sv_2mortal(newSViv(saviters - 1)));
48c036b1 258
ffc61ed2 259 (void)SvPOK_only_UTF8(targ);
48c036b1 260 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 261 SvSETMAGIC(targ);
9212bbba 262 SvTAINT(targ);
5cd24f17 263
4633a7c4 264 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
265 POPSUBST(cx);
266 RETURNOP(pm->op_next);
267 }
8e5e9ebe 268 cx->sb_iters = saviters;
a0d0e21e 269 }
cf93c79d 270 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
271 m = s;
272 s = orig;
cf93c79d 273 cx->sb_orig = orig = rx->subbeg;
a0d0e21e
LW
274 s = orig + (m - s);
275 cx->sb_strend = s + (cx->sb_strend - m);
276 }
f0ab9afb 277 cx->sb_m = m = rx->offs[0].start + orig;
db79b45b 278 if (m > s) {
bfed75c6 279 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
280 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
281 else
282 sv_catpvn(dstr, s, m-s);
283 }
f0ab9afb 284 cx->sb_s = rx->offs[0].end + orig;
084916e3 285 { /* Update the pos() information. */
44f8325f 286 SV * const sv = cx->sb_targ;
084916e3
JH
287 MAGIC *mg;
288 I32 i;
7a7f3e45 289 SvUPGRADE(sv, SVt_PVMG);
14befaf4 290 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 291#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 292 if (SvIsCOW(sv))
d83f0a82
NC
293 sv_force_normal_flags(sv, 0);
294#endif
295 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
296 NULL, 0);
084916e3
JH
297 }
298 i = m - orig;
299 if (DO_UTF8(sv))
300 sv_pos_b2u(sv, &i);
301 mg->mg_len = i;
302 }
988e6e7e 303 if (old != rx)
454f1e26 304 (void)ReREFCNT_inc(rx);
d9f97599
GS
305 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
306 rxres_save(&cx->sb_rxres, rx);
29f2e912 307 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
308}
309
c90c0ff4 310void
864dbfa3 311Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
312{
313 UV *p = (UV*)*rsp;
314 U32 i;
96a5add6 315 PERL_UNUSED_CONTEXT;
c90c0ff4 316
d9f97599 317 if (!p || p[1] < rx->nparens) {
f8c7b90f 318#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
319 i = 7 + rx->nparens * 2;
320#else
d9f97599 321 i = 6 + rx->nparens * 2;
ed252734 322#endif
c90c0ff4 323 if (!p)
a02a5408 324 Newx(p, i, UV);
c90c0ff4
PP
325 else
326 Renew(p, i, UV);
327 *rsp = (void*)p;
328 }
329
c445ea15 330 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? rx->subbeg : NULL);
cf93c79d 331 RX_MATCH_COPIED_off(rx);
c90c0ff4 332
f8c7b90f 333#ifdef PERL_OLD_COPY_ON_WRITE
ed252734 334 *p++ = PTR2UV(rx->saved_copy);
c445ea15 335 rx->saved_copy = NULL;
ed252734
NC
336#endif
337
d9f97599 338 *p++ = rx->nparens;
c90c0ff4 339
56431972 340 *p++ = PTR2UV(rx->subbeg);
cf93c79d 341 *p++ = (UV)rx->sublen;
d9f97599 342 for (i = 0; i <= rx->nparens; ++i) {
f0ab9afb
NC
343 *p++ = (UV)rx->offs[i].start;
344 *p++ = (UV)rx->offs[i].end;
c90c0ff4
PP
345 }
346}
347
348void
864dbfa3 349Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
350{
351 UV *p = (UV*)*rsp;
352 U32 i;
96a5add6 353 PERL_UNUSED_CONTEXT;
c90c0ff4 354
ed252734 355 RX_MATCH_COPY_FREE(rx);
cf93c79d 356 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
357 *p++ = 0;
358
f8c7b90f 359#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
360 if (rx->saved_copy)
361 SvREFCNT_dec (rx->saved_copy);
362 rx->saved_copy = INT2PTR(SV*,*p);
363 *p++ = 0;
364#endif
365
d9f97599 366 rx->nparens = *p++;
c90c0ff4 367
56431972 368 rx->subbeg = INT2PTR(char*,*p++);
cf93c79d 369 rx->sublen = (I32)(*p++);
d9f97599 370 for (i = 0; i <= rx->nparens; ++i) {
f0ab9afb
NC
371 rx->offs[i].start = (I32)(*p++);
372 rx->offs[i].end = (I32)(*p++);
c90c0ff4
PP
373 }
374}
375
376void
864dbfa3 377Perl_rxres_free(pTHX_ void **rsp)
c90c0ff4 378{
44f8325f 379 UV * const p = (UV*)*rsp;
96a5add6 380 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
381
382 if (p) {
94010e71
NC
383#ifdef PERL_POISON
384 void *tmp = INT2PTR(char*,*p);
385 Safefree(tmp);
386 if (*p)
7e337ee0 387 PoisonFree(*p, 1, sizeof(*p));
94010e71 388#else
56431972 389 Safefree(INT2PTR(char*,*p));
94010e71 390#endif
f8c7b90f 391#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
392 if (p[1]) {
393 SvREFCNT_dec (INT2PTR(SV*,p[1]));
394 }
395#endif
c90c0ff4 396 Safefree(p);
4608196e 397 *rsp = NULL;
c90c0ff4
PP
398 }
399}
400
a0d0e21e
LW
401PP(pp_formline)
402{
97aff369 403 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 404 register SV * const tmpForm = *++MARK;
dea28490 405 register U32 *fpc;
a0d0e21e 406 register char *t;
245d4a47 407 const char *f;
a0d0e21e 408 register I32 arg;
c445ea15
AL
409 register SV *sv = NULL;
410 const char *item = NULL;
9c5ffd7c
JH
411 I32 itemsize = 0;
412 I32 fieldsize = 0;
a0d0e21e 413 I32 lines = 0;
c445ea15
AL
414 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
415 const char *chophere = NULL;
416 char *linemark = NULL;
65202027 417 NV value;
9c5ffd7c 418 bool gotsome = FALSE;
a0d0e21e 419 STRLEN len;
823a54a3 420 const STRLEN fudge = SvPOK(tmpForm)
24c89738 421 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
422 bool item_is_utf8 = FALSE;
423 bool targ_is_utf8 = FALSE;
c445ea15 424 SV * nsv = NULL;
cbbf8932 425 OP * parseres = NULL;
bfed75c6 426 const char *fmt;
a1b95068 427 bool oneline;
a0d0e21e 428
76e3520e 429 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
430 if (SvREADONLY(tmpForm)) {
431 SvREADONLY_off(tmpForm);
a1b95068 432 parseres = doparseform(tmpForm);
445b3f51
GS
433 SvREADONLY_on(tmpForm);
434 }
435 else
a1b95068
LW
436 parseres = doparseform(tmpForm);
437 if (parseres)
438 return parseres;
a0d0e21e 439 }
3280af22 440 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
441 if (DO_UTF8(PL_formtarget))
442 targ_is_utf8 = TRUE;
a0ed51b3 443 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 444 t += len;
245d4a47 445 f = SvPV_const(tmpForm, len);
a0d0e21e 446 /* need to jump to the next word */
245d4a47 447 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
448
449 for (;;) {
450 DEBUG_f( {
bfed75c6 451 const char *name = "???";
a0d0e21e
LW
452 arg = -1;
453 switch (*fpc) {
454 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
455 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
456 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
457 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
458 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
459
460 case FF_CHECKNL: name = "CHECKNL"; break;
461 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
462 case FF_SPACE: name = "SPACE"; break;
463 case FF_HALFSPACE: name = "HALFSPACE"; break;
464 case FF_ITEM: name = "ITEM"; break;
465 case FF_CHOP: name = "CHOP"; break;
466 case FF_LINEGLOB: name = "LINEGLOB"; break;
467 case FF_NEWLINE: name = "NEWLINE"; break;
468 case FF_MORE: name = "MORE"; break;
469 case FF_LINEMARK: name = "LINEMARK"; break;
470 case FF_END: name = "END"; break;
bfed75c6 471 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 472 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
473 }
474 if (arg >= 0)
bf49b057 475 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 476 else
bf49b057 477 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 478 } );
a0d0e21e
LW
479 switch (*fpc++) {
480 case FF_LINEMARK:
481 linemark = t;
a0d0e21e
LW
482 lines++;
483 gotsome = FALSE;
484 break;
485
486 case FF_LITERAL:
487 arg = *fpc++;
1bd51a4c 488 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 489 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
490 *t = '\0';
491 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
492 t = SvEND(PL_formtarget);
1bd51a4c
IH
493 break;
494 }
495 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 496 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
497 *t = '\0';
498 sv_utf8_upgrade(PL_formtarget);
499 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
500 t = SvEND(PL_formtarget);
501 targ_is_utf8 = TRUE;
502 }
a0d0e21e
LW
503 while (arg--)
504 *t++ = *f++;
505 break;
506
507 case FF_SKIP:
508 f += *fpc++;
509 break;
510
511 case FF_FETCH:
512 arg = *fpc++;
513 f += arg;
514 fieldsize = arg;
515
516 if (MARK < SP)
517 sv = *++MARK;
518 else {
3280af22 519 sv = &PL_sv_no;
599cee73 520 if (ckWARN(WARN_SYNTAX))
9014280d 521 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
522 }
523 break;
524
525 case FF_CHECKNL:
5a34cab7
NC
526 {
527 const char *send;
528 const char *s = item = SvPV_const(sv, len);
529 itemsize = len;
530 if (DO_UTF8(sv)) {
531 itemsize = sv_len_utf8(sv);
532 if (itemsize != (I32)len) {
533 I32 itembytes;
534 if (itemsize > fieldsize) {
535 itemsize = fieldsize;
536 itembytes = itemsize;
537 sv_pos_u2b(sv, &itembytes, 0);
538 }
539 else
540 itembytes = len;
541 send = chophere = s + itembytes;
542 while (s < send) {
543 if (*s & ~31)
544 gotsome = TRUE;
545 else if (*s == '\n')
546 break;
547 s++;
548 }
549 item_is_utf8 = TRUE;
550 itemsize = s - item;
551 sv_pos_b2u(sv, &itemsize);
552 break;
a0ed51b3 553 }
a0ed51b3 554 }
5a34cab7
NC
555 item_is_utf8 = FALSE;
556 if (itemsize > fieldsize)
557 itemsize = fieldsize;
558 send = chophere = s + itemsize;
559 while (s < send) {
560 if (*s & ~31)
561 gotsome = TRUE;
562 else if (*s == '\n')
563 break;
564 s++;
565 }
566 itemsize = s - item;
567 break;
a0ed51b3 568 }
a0d0e21e
LW
569
570 case FF_CHECKCHOP:
5a34cab7
NC
571 {
572 const char *s = item = SvPV_const(sv, len);
573 itemsize = len;
574 if (DO_UTF8(sv)) {
575 itemsize = sv_len_utf8(sv);
576 if (itemsize != (I32)len) {
577 I32 itembytes;
578 if (itemsize <= fieldsize) {
579 const char *send = chophere = s + itemsize;
580 while (s < send) {
581 if (*s == '\r') {
582 itemsize = s - item;
a0ed51b3 583 chophere = s;
a0ed51b3 584 break;
5a34cab7
NC
585 }
586 if (*s++ & ~31)
a0ed51b3 587 gotsome = TRUE;
a0ed51b3 588 }
a0ed51b3 589 }
5a34cab7
NC
590 else {
591 const char *send;
592 itemsize = fieldsize;
593 itembytes = itemsize;
594 sv_pos_u2b(sv, &itembytes, 0);
595 send = chophere = s + itembytes;
596 while (s < send || (s == send && isSPACE(*s))) {
597 if (isSPACE(*s)) {
598 if (chopspace)
599 chophere = s;
600 if (*s == '\r')
601 break;
602 }
603 else {
604 if (*s & ~31)
605 gotsome = TRUE;
606 if (strchr(PL_chopset, *s))
607 chophere = s + 1;
608 }
609 s++;
610 }
611 itemsize = chophere - item;
612 sv_pos_b2u(sv, &itemsize);
613 }
614 item_is_utf8 = TRUE;
a0d0e21e
LW
615 break;
616 }
a0d0e21e 617 }
5a34cab7
NC
618 item_is_utf8 = FALSE;
619 if (itemsize <= fieldsize) {
620 const char *const send = chophere = s + itemsize;
621 while (s < send) {
622 if (*s == '\r') {
623 itemsize = s - item;
a0d0e21e 624 chophere = s;
a0d0e21e 625 break;
5a34cab7
NC
626 }
627 if (*s++ & ~31)
a0d0e21e 628 gotsome = TRUE;
a0d0e21e 629 }
a0d0e21e 630 }
5a34cab7
NC
631 else {
632 const char *send;
633 itemsize = fieldsize;
634 send = chophere = s + itemsize;
635 while (s < send || (s == send && isSPACE(*s))) {
636 if (isSPACE(*s)) {
637 if (chopspace)
638 chophere = s;
639 if (*s == '\r')
640 break;
641 }
642 else {
643 if (*s & ~31)
644 gotsome = TRUE;
645 if (strchr(PL_chopset, *s))
646 chophere = s + 1;
647 }
648 s++;
649 }
650 itemsize = chophere - item;
651 }
652 break;
a0d0e21e 653 }
a0d0e21e
LW
654
655 case FF_SPACE:
656 arg = fieldsize - itemsize;
657 if (arg) {
658 fieldsize -= arg;
659 while (arg-- > 0)
660 *t++ = ' ';
661 }
662 break;
663
664 case FF_HALFSPACE:
665 arg = fieldsize - itemsize;
666 if (arg) {
667 arg /= 2;
668 fieldsize -= arg;
669 while (arg-- > 0)
670 *t++ = ' ';
671 }
672 break;
673
674 case FF_ITEM:
5a34cab7
NC
675 {
676 const char *s = item;
677 arg = itemsize;
678 if (item_is_utf8) {
679 if (!targ_is_utf8) {
680 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
681 *t = '\0';
682 sv_utf8_upgrade(PL_formtarget);
683 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
684 t = SvEND(PL_formtarget);
685 targ_is_utf8 = TRUE;
a0ed51b3 686 }
5a34cab7
NC
687 while (arg--) {
688 if (UTF8_IS_CONTINUED(*s)) {
689 STRLEN skip = UTF8SKIP(s);
690 switch (skip) {
691 default:
692 Move(s,t,skip,char);
693 s += skip;
694 t += skip;
695 break;
696 case 7: *t++ = *s++;
697 case 6: *t++ = *s++;
698 case 5: *t++ = *s++;
699 case 4: *t++ = *s++;
700 case 3: *t++ = *s++;
701 case 2: *t++ = *s++;
702 case 1: *t++ = *s++;
703 }
704 }
705 else {
706 if ( !((*t++ = *s++) & ~31) )
707 t[-1] = ' ';
708 }
a0ed51b3 709 }
5a34cab7 710 break;
a0ed51b3 711 }
5a34cab7
NC
712 if (targ_is_utf8 && !item_is_utf8) {
713 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
714 *t = '\0';
715 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
716 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 717#ifdef EBCDIC
901017d6 718 const int ch = *t;
5a34cab7 719 if (iscntrl(ch))
78da4d13 720#else
5a34cab7 721 if (!(*t & ~31))
78da4d13 722#endif
5a34cab7
NC
723 *t = ' ';
724 }
725 break;
78da4d13 726 }
5a34cab7 727 while (arg--) {
9d116dd7 728#ifdef EBCDIC
901017d6 729 const int ch = *t++ = *s++;
5a34cab7 730 if (iscntrl(ch))
a0d0e21e 731#else
5a34cab7 732 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 733#endif
5a34cab7
NC
734 t[-1] = ' ';
735 }
736 break;
a0d0e21e 737 }
a0d0e21e
LW
738
739 case FF_CHOP:
5a34cab7
NC
740 {
741 const char *s = chophere;
742 if (chopspace) {
af68e756 743 while (isSPACE(*s))
5a34cab7
NC
744 s++;
745 }
746 sv_chop(sv,s);
747 SvSETMAGIC(sv);
748 break;
a0d0e21e 749 }
a0d0e21e 750
a1b95068
LW
751 case FF_LINESNGL:
752 chopspace = 0;
753 oneline = TRUE;
754 goto ff_line;
a0d0e21e 755 case FF_LINEGLOB:
a1b95068
LW
756 oneline = FALSE;
757 ff_line:
5a34cab7
NC
758 {
759 const char *s = item = SvPV_const(sv, len);
760 itemsize = len;
761 if ((item_is_utf8 = DO_UTF8(sv)))
762 itemsize = sv_len_utf8(sv);
763 if (itemsize) {
764 bool chopped = FALSE;
765 const char *const send = s + len;
766 gotsome = TRUE;
767 chophere = s + itemsize;
768 while (s < send) {
769 if (*s++ == '\n') {
770 if (oneline) {
771 chopped = TRUE;
772 chophere = s;
773 break;
774 } else {
775 if (s == send) {
776 itemsize--;
777 chopped = TRUE;
778 } else
779 lines++;
780 }
1bd51a4c 781 }
a0d0e21e 782 }
5a34cab7
NC
783 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
784 if (targ_is_utf8)
785 SvUTF8_on(PL_formtarget);
786 if (oneline) {
787 SvCUR_set(sv, chophere - item);
788 sv_catsv(PL_formtarget, sv);
789 SvCUR_set(sv, itemsize);
790 } else
791 sv_catsv(PL_formtarget, sv);
792 if (chopped)
793 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) - 1);
794 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
795 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
796 if (item_is_utf8)
797 targ_is_utf8 = TRUE;
a0d0e21e 798 }
5a34cab7 799 break;
a0d0e21e 800 }
a0d0e21e 801
a1b95068
LW
802 case FF_0DECIMAL:
803 arg = *fpc++;
804#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
805 fmt = (const char *)
806 ((arg & 256) ?
807 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 808#else
10edeb5d
JH
809 fmt = (const char *)
810 ((arg & 256) ?
811 "%#0*.*f" : "%0*.*f");
a1b95068
LW
812#endif
813 goto ff_dec;
a0d0e21e 814 case FF_DECIMAL:
a0d0e21e 815 arg = *fpc++;
65202027 816#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
817 fmt = (const char *)
818 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 819#else
10edeb5d
JH
820 fmt = (const char *)
821 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 822#endif
a1b95068 823 ff_dec:
784707d5
JP
824 /* If the field is marked with ^ and the value is undefined,
825 blank it out. */
784707d5
JP
826 if ((arg & 512) && !SvOK(sv)) {
827 arg = fieldsize;
828 while (arg--)
829 *t++ = ' ';
830 break;
831 }
832 gotsome = TRUE;
833 value = SvNV(sv);
a1b95068 834 /* overflow evidence */
bfed75c6 835 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
836 arg = fieldsize;
837 while (arg--)
838 *t++ = '#';
839 break;
840 }
784707d5
JP
841 /* Formats aren't yet marked for locales, so assume "yes". */
842 {
843 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 844 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
845 RESTORE_NUMERIC_STANDARD();
846 }
847 t += fieldsize;
848 break;
a1b95068 849
a0d0e21e
LW
850 case FF_NEWLINE:
851 f++;
852 while (t-- > linemark && *t == ' ') ;
853 t++;
854 *t++ = '\n';
855 break;
856
857 case FF_BLANK:
858 arg = *fpc++;
859 if (gotsome) {
860 if (arg) { /* repeat until fields exhausted? */
861 *t = '\0';
b15aece3 862 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 863 lines += FmLINES(PL_formtarget);
a0d0e21e
LW
864 if (lines == 200) {
865 arg = t - linemark;
866 if (strnEQ(linemark, linemark - arg, arg))
cea2e8a9 867 DIE(aTHX_ "Runaway format");
a0d0e21e 868 }
1bd51a4c
IH
869 if (targ_is_utf8)
870 SvUTF8_on(PL_formtarget);
3280af22 871 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
872 SP = ORIGMARK;
873 RETURNOP(cLISTOP->op_first);
874 }
875 }
876 else {
877 t = linemark;
878 lines--;
879 }
880 break;
881
882 case FF_MORE:
5a34cab7
NC
883 {
884 const char *s = chophere;
885 const char *send = item + len;
886 if (chopspace) {
af68e756 887 while (isSPACE(*s) && (s < send))
5a34cab7 888 s++;
a0d0e21e 889 }
5a34cab7
NC
890 if (s < send) {
891 char *s1;
892 arg = fieldsize - itemsize;
893 if (arg) {
894 fieldsize -= arg;
895 while (arg-- > 0)
896 *t++ = ' ';
897 }
898 s1 = t - 3;
899 if (strnEQ(s1," ",3)) {
900 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
901 s1--;
902 }
903 *s1++ = '.';
904 *s1++ = '.';
905 *s1++ = '.';
a0d0e21e 906 }
5a34cab7 907 break;
a0d0e21e 908 }
a0d0e21e
LW
909 case FF_END:
910 *t = '\0';
b15aece3 911 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
912 if (targ_is_utf8)
913 SvUTF8_on(PL_formtarget);
3280af22 914 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
915 SP = ORIGMARK;
916 RETPUSHYES;
917 }
918 }
919}
920
921PP(pp_grepstart)
922{
27da23d5 923 dVAR; dSP;
a0d0e21e
LW
924 SV *src;
925
3280af22 926 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 927 (void)POPMARK;
54310121 928 if (GIMME_V == G_SCALAR)
0b024f31 929 XPUSHs(sv_2mortal(newSViv(0)));
533c011a 930 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 931 }
3280af22 932 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
933 pp_pushmark(); /* push dst */
934 pp_pushmark(); /* push src */
a0d0e21e
LW
935 ENTER; /* enter outer scope */
936
937 SAVETMPS;
59f00321
RGS
938 if (PL_op->op_private & OPpGREP_LEX)
939 SAVESPTR(PAD_SVl(PL_op->op_targ));
940 else
941 SAVE_DEFSV;
a0d0e21e 942 ENTER; /* enter inner scope */
7766f137 943 SAVEVPTR(PL_curpm);
a0d0e21e 944
3280af22 945 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 946 SvTEMP_off(src);
59f00321
RGS
947 if (PL_op->op_private & OPpGREP_LEX)
948 PAD_SVl(PL_op->op_targ) = src;
949 else
950 DEFSV = src;
a0d0e21e
LW
951
952 PUTBACK;
533c011a 953 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 954 pp_pushmark(); /* push top */
533c011a 955 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
956}
957
a0d0e21e
LW
958PP(pp_mapwhile)
959{
27da23d5 960 dVAR; dSP;
f54cb97a 961 const I32 gimme = GIMME_V;
544f3153 962 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
963 I32 count;
964 I32 shift;
965 SV** src;
ac27b0f5 966 SV** dst;
a0d0e21e 967
544f3153 968 /* first, move source pointer to the next item in the source list */
3280af22 969 ++PL_markstack_ptr[-1];
544f3153
GS
970
971 /* if there are new items, push them into the destination list */
4c90a460 972 if (items && gimme != G_VOID) {
544f3153
GS
973 /* might need to make room back there first */
974 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
975 /* XXX this implementation is very pessimal because the stack
976 * is repeatedly extended for every set of items. Is possible
977 * to do this without any stack extension or copying at all
978 * by maintaining a separate list over which the map iterates
18ef8bea 979 * (like foreach does). --gsar */
544f3153
GS
980
981 /* everything in the stack after the destination list moves
982 * towards the end the stack by the amount of room needed */
983 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
984
985 /* items to shift up (accounting for the moved source pointer) */
986 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
987
988 /* This optimization is by Ben Tilly and it does
989 * things differently from what Sarathy (gsar)
990 * is describing. The downside of this optimization is
991 * that leaves "holes" (uninitialized and hopefully unused areas)
992 * to the Perl stack, but on the other hand this
993 * shouldn't be a problem. If Sarathy's idea gets
994 * implemented, this optimization should become
995 * irrelevant. --jhi */
996 if (shift < count)
997 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 998
924508f0
GS
999 EXTEND(SP,shift);
1000 src = SP;
1001 dst = (SP += shift);
3280af22
NIS
1002 PL_markstack_ptr[-1] += shift;
1003 *PL_markstack_ptr += shift;
544f3153 1004 while (count--)
a0d0e21e
LW
1005 *dst-- = *src--;
1006 }
544f3153 1007 /* copy the new items down to the destination list */
ac27b0f5 1008 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
1009 if (gimme == G_ARRAY) {
1010 while (items-- > 0)
1011 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1012 }
bfed75c6 1013 else {
22023b26
TP
1014 /* scalar context: we don't care about which values map returns
1015 * (we use undef here). And so we certainly don't want to do mortal
1016 * copies of meaningless values. */
1017 while (items-- > 0) {
b988aa42 1018 (void)POPs;
22023b26
TP
1019 *dst-- = &PL_sv_undef;
1020 }
1021 }
a0d0e21e
LW
1022 }
1023 LEAVE; /* exit inner scope */
1024
1025 /* All done yet? */
3280af22 1026 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1027
1028 (void)POPMARK; /* pop top */
1029 LEAVE; /* exit outer scope */
1030 (void)POPMARK; /* pop src */
3280af22 1031 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1032 (void)POPMARK; /* pop dst */
3280af22 1033 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1034 if (gimme == G_SCALAR) {
7cc47870
RGS
1035 if (PL_op->op_private & OPpGREP_LEX) {
1036 SV* sv = sv_newmortal();
1037 sv_setiv(sv, items);
1038 PUSHs(sv);
1039 }
1040 else {
1041 dTARGET;
1042 XPUSHi(items);
1043 }
a0d0e21e 1044 }
54310121
PP
1045 else if (gimme == G_ARRAY)
1046 SP += items;
a0d0e21e
LW
1047 RETURN;
1048 }
1049 else {
1050 SV *src;
1051
1052 ENTER; /* enter inner scope */
7766f137 1053 SAVEVPTR(PL_curpm);
a0d0e21e 1054
544f3153 1055 /* set $_ to the new source item */
3280af22 1056 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1057 SvTEMP_off(src);
59f00321
RGS
1058 if (PL_op->op_private & OPpGREP_LEX)
1059 PAD_SVl(PL_op->op_targ) = src;
1060 else
1061 DEFSV = src;
a0d0e21e
LW
1062
1063 RETURNOP(cLOGOP->op_other);
1064 }
1065}
1066
a0d0e21e
LW
1067/* Range stuff. */
1068
1069PP(pp_range)
1070{
97aff369 1071 dVAR;
a0d0e21e 1072 if (GIMME == G_ARRAY)
1a67a97c 1073 return NORMAL;
538573f7 1074 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1075 return cLOGOP->op_other;
538573f7 1076 else
1a67a97c 1077 return NORMAL;
a0d0e21e
LW
1078}
1079
1080PP(pp_flip)
1081{
97aff369 1082 dVAR;
39644a26 1083 dSP;
a0d0e21e
LW
1084
1085 if (GIMME == G_ARRAY) {
1a67a97c 1086 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1087 }
1088 else {
1089 dTOPss;
44f8325f 1090 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1091 int flip = 0;
790090df 1092
bfed75c6 1093 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1094 if (GvIO(PL_last_in_gv)) {
1095 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1096 }
1097 else {
fafc274c 1098 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1099 if (gv && GvSV(gv))
1100 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1101 }
bfed75c6
AL
1102 } else {
1103 flip = SvTRUE(sv);
1104 }
1105 if (flip) {
a0d0e21e 1106 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1107 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1108 sv_setiv(targ, 1);
3e3baf6d 1109 SETs(targ);
a0d0e21e
LW
1110 RETURN;
1111 }
1112 else {
1113 sv_setiv(targ, 0);
924508f0 1114 SP--;
1a67a97c 1115 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1116 }
1117 }
c69006e4 1118 sv_setpvn(TARG, "", 0);
a0d0e21e
LW
1119 SETs(targ);
1120 RETURN;
1121 }
1122}
1123
8e9bbdb9
RGS
1124/* This code tries to decide if "$left .. $right" should use the
1125 magical string increment, or if the range is numeric (we make
1126 an exception for .."0" [#18165]). AMS 20021031. */
1127
1128#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1129 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1130 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1131 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1132 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1133 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1134
a0d0e21e
LW
1135PP(pp_flop)
1136{
97aff369 1137 dVAR; dSP;
a0d0e21e
LW
1138
1139 if (GIMME == G_ARRAY) {
1140 dPOPPOPssrl;
86cb7173 1141
5b295bef
RD
1142 SvGETMAGIC(left);
1143 SvGETMAGIC(right);
a0d0e21e 1144
8e9bbdb9 1145 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1146 register IV i, j;
1147 IV max;
4fe3f0fa
MHM
1148 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1149 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1150 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1151 i = SvIV(left);
1152 max = SvIV(right);
bbce6d69 1153 if (max >= i) {
c1ab3db2
AK
1154 j = max - i + 1;
1155 EXTEND_MORTAL(j);
1156 EXTEND(SP, j);
bbce6d69 1157 }
c1ab3db2
AK
1158 else
1159 j = 0;
1160 while (j--) {
901017d6 1161 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1162 PUSHs(sv);
1163 }
1164 }
1165 else {
44f8325f 1166 SV * const final = sv_mortalcopy(right);
13c5b33c 1167 STRLEN len;
823a54a3 1168 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1169
901017d6 1170 SV *sv = sv_mortalcopy(left);
13c5b33c 1171 SvPV_force_nolen(sv);
89ea2908 1172 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1173 XPUSHs(sv);
b15aece3 1174 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1175 break;
a0d0e21e
LW
1176 sv = sv_2mortal(newSVsv(sv));
1177 sv_inc(sv);
1178 }
a0d0e21e
LW
1179 }
1180 }
1181 else {
1182 dTOPss;
901017d6 1183 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1184 int flop = 0;
a0d0e21e 1185 sv_inc(targ);
4e3399f9
YST
1186
1187 if (PL_op->op_private & OPpFLIP_LINENUM) {
1188 if (GvIO(PL_last_in_gv)) {
1189 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1190 }
1191 else {
fafc274c 1192 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1193 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1194 }
1195 }
1196 else {
1197 flop = SvTRUE(sv);
1198 }
1199
1200 if (flop) {
a0d0e21e 1201 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1202 sv_catpvs(targ, "E0");
a0d0e21e
LW
1203 }
1204 SETs(targ);
1205 }
1206
1207 RETURN;
1208}
1209
1210/* Control. */
1211
27da23d5 1212static const char * const context_name[] = {
515afda2
NC
1213 "pseudo-block",
1214 "subroutine",
1215 "eval",
1216 "loop",
1217 "substitution",
1218 "block",
0d863452
RH
1219 "format",
1220 "given",
1221 "when"
515afda2
NC
1222};
1223
76e3520e 1224STATIC I32
06b5626a 1225S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1226{
97aff369 1227 dVAR;
a0d0e21e 1228 register I32 i;
a0d0e21e
LW
1229
1230 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1231 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1232 switch (CxTYPE(cx)) {
a0d0e21e 1233 case CXt_SUBST:
a0d0e21e 1234 case CXt_SUB:
7766f137 1235 case CXt_FORMAT:
a0d0e21e 1236 case CXt_EVAL:
0a753a76 1237 case CXt_NULL:
0d863452
RH
1238 case CXt_GIVEN:
1239 case CXt_WHEN:
e476b1b5 1240 if (ckWARN(WARN_EXITING))
515afda2
NC
1241 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1242 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1243 if (CxTYPE(cx) == CXt_NULL)
1244 return -1;
1245 break;
a0d0e21e 1246 case CXt_LOOP:
901017d6 1247 if ( !cx->blk_loop.label || strNE(label, cx->blk_loop.label) ) {
cea2e8a9 1248 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
68dc0745 1249 (long)i, cx->blk_loop.label));
a0d0e21e
LW
1250 continue;
1251 }
cea2e8a9 1252 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1253 return i;
1254 }
1255 }
1256 return i;
1257}
1258
0d863452
RH
1259
1260
e50aee73 1261I32
864dbfa3 1262Perl_dowantarray(pTHX)
e50aee73 1263{
97aff369 1264 dVAR;
f54cb97a 1265 const I32 gimme = block_gimme();
54310121
PP
1266 return (gimme == G_VOID) ? G_SCALAR : gimme;
1267}
1268
1269I32
864dbfa3 1270Perl_block_gimme(pTHX)
54310121 1271{
97aff369 1272 dVAR;
06b5626a 1273 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1274 if (cxix < 0)
46fc3d4c 1275 return G_VOID;
e50aee73 1276
54310121 1277 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1278 case G_VOID:
1279 return G_VOID;
54310121 1280 case G_SCALAR:
e50aee73 1281 return G_SCALAR;
54310121
PP
1282 case G_ARRAY:
1283 return G_ARRAY;
1284 default:
cea2e8a9 1285 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1286 /* NOTREACHED */
1287 return 0;
54310121 1288 }
e50aee73
AD
1289}
1290
78f9721b
SM
1291I32
1292Perl_is_lvalue_sub(pTHX)
1293{
97aff369 1294 dVAR;
06b5626a 1295 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1296 assert(cxix >= 0); /* We should only be called from inside subs */
1297
cc8d50a7
NC
1298 if (cxstack[cxix].blk_sub.lval && CvLVALUE(cxstack[cxix].blk_sub.cv))
1299 return cxstack[cxix].blk_sub.lval;
78f9721b
SM
1300 else
1301 return 0;
1302}
1303
76e3520e 1304STATIC I32
901017d6 1305S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1306{
97aff369 1307 dVAR;
a0d0e21e 1308 I32 i;
a0d0e21e 1309 for (i = startingblock; i >= 0; i--) {
901017d6 1310 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1311 switch (CxTYPE(cx)) {
a0d0e21e
LW
1312 default:
1313 continue;
1314 case CXt_EVAL:
1315 case CXt_SUB:
7766f137 1316 case CXt_FORMAT:
cea2e8a9 1317 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1318 return i;
1319 }
1320 }
1321 return i;
1322}
1323
76e3520e 1324STATIC I32
cea2e8a9 1325S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1326{
97aff369 1327 dVAR;
a0d0e21e 1328 I32 i;
a0d0e21e 1329 for (i = startingblock; i >= 0; i--) {
06b5626a 1330 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1331 switch (CxTYPE(cx)) {
a0d0e21e
LW
1332 default:
1333 continue;
1334 case CXt_EVAL:
cea2e8a9 1335 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1336 return i;
1337 }
1338 }
1339 return i;
1340}
1341
76e3520e 1342STATIC I32
cea2e8a9 1343S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1344{
97aff369 1345 dVAR;
a0d0e21e 1346 I32 i;
a0d0e21e 1347 for (i = startingblock; i >= 0; i--) {
901017d6 1348 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1349 switch (CxTYPE(cx)) {
a0d0e21e 1350 case CXt_SUBST:
a0d0e21e 1351 case CXt_SUB:
7766f137 1352 case CXt_FORMAT:
a0d0e21e 1353 case CXt_EVAL:
0a753a76 1354 case CXt_NULL:
e476b1b5 1355 if (ckWARN(WARN_EXITING))
515afda2
NC
1356 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1357 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1358 if ((CxTYPE(cx)) == CXt_NULL)
1359 return -1;
1360 break;
a0d0e21e 1361 case CXt_LOOP:
cea2e8a9 1362 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1363 return i;
1364 }
1365 }
1366 return i;
1367}
1368
0d863452
RH
1369STATIC I32
1370S_dopoptogiven(pTHX_ I32 startingblock)
1371{
97aff369 1372 dVAR;
0d863452
RH
1373 I32 i;
1374 for (i = startingblock; i >= 0; i--) {
1375 register const PERL_CONTEXT *cx = &cxstack[i];
1376 switch (CxTYPE(cx)) {
1377 default:
1378 continue;
1379 case CXt_GIVEN:
1380 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1381 return i;
1382 case CXt_LOOP:
1383 if (CxFOREACHDEF(cx)) {
1384 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1385 return i;
1386 }
1387 }
1388 }
1389 return i;
1390}
1391
1392STATIC I32
1393S_dopoptowhen(pTHX_ I32 startingblock)
1394{
97aff369 1395 dVAR;
0d863452
RH
1396 I32 i;
1397 for (i = startingblock; i >= 0; i--) {
1398 register const PERL_CONTEXT *cx = &cxstack[i];
1399 switch (CxTYPE(cx)) {
1400 default:
1401 continue;
1402 case CXt_WHEN:
1403 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1404 return i;
1405 }
1406 }
1407 return i;
1408}
1409
a0d0e21e 1410void
864dbfa3 1411Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1412{
97aff369 1413 dVAR;
a0d0e21e
LW
1414 I32 optype;
1415
1416 while (cxstack_ix > cxix) {
b0d9ce38 1417 SV *sv;
06b5626a 1418 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1419 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1420 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1421 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1422 switch (CxTYPE(cx)) {
c90c0ff4
PP
1423 case CXt_SUBST:
1424 POPSUBST(cx);
1425 continue; /* not break */
a0d0e21e 1426 case CXt_SUB:
b0d9ce38
GS
1427 POPSUB(cx,sv);
1428 LEAVESUB(sv);
a0d0e21e
LW
1429 break;
1430 case CXt_EVAL:
1431 POPEVAL(cx);
1432 break;
1433 case CXt_LOOP:
1434 POPLOOP(cx);
1435 break;
0a753a76 1436 case CXt_NULL:
a0d0e21e 1437 break;
7766f137
GS
1438 case CXt_FORMAT:
1439 POPFORMAT(cx);
1440 break;
a0d0e21e 1441 }
c90c0ff4 1442 cxstack_ix--;
a0d0e21e 1443 }
1b6737cc 1444 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1445}
1446
5a844595
GS
1447void
1448Perl_qerror(pTHX_ SV *err)
1449{
97aff369 1450 dVAR;
5a844595
GS
1451 if (PL_in_eval)
1452 sv_catsv(ERRSV, err);
1453 else if (PL_errors)
1454 sv_catsv(PL_errors, err);
1455 else
be2597df 1456 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1457 if (PL_parser)
1458 ++PL_parser->error_count;
5a844595
GS
1459}
1460
a0d0e21e 1461OP *
35a4481c 1462Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1463{
27da23d5 1464 dVAR;
87582a92 1465
3280af22 1466 if (PL_in_eval) {
a0d0e21e 1467 I32 cxix;
a0d0e21e 1468 I32 gimme;
a0d0e21e 1469
4e6ea2c3 1470 if (message) {
faef0170 1471 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1472 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1473 SV * const err = ERRSV;
c445ea15 1474 const char *e = NULL;
98eae8f5 1475 if (!SvPOK(err))
c69006e4 1476 sv_setpvn(err,"",0);
98eae8f5 1477 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1478 STRLEN len;
349d4f2f 1479 e = SvPV_const(err, len);
0510663f 1480 e += len - msglen;
98eae8f5 1481 if (*e != *message || strNE(e,message))
c445ea15 1482 e = NULL;
98eae8f5
GS
1483 }
1484 if (!e) {
1485 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1486 sv_catpvn(err, prefix, sizeof(prefix)-1);
1487 sv_catpvn(err, message, msglen);
e476b1b5 1488 if (ckWARN(WARN_MISC)) {
504618e9 1489 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1490 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1491 }
4633a7c4 1492 }
4633a7c4 1493 }
1aa99e6b 1494 else {
06bf62c7 1495 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1496 }
4633a7c4 1497 }
4e6ea2c3 1498
5a844595
GS
1499 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1500 && PL_curstackinfo->si_prev)
1501 {
bac4b2ad 1502 dounwind(-1);
d3acc0f7 1503 POPSTACK;
bac4b2ad 1504 }
e336de0d 1505
a0d0e21e
LW
1506 if (cxix >= 0) {
1507 I32 optype;
35a4481c 1508 register PERL_CONTEXT *cx;
901017d6 1509 SV **newsp;
a0d0e21e
LW
1510
1511 if (cxix < cxstack_ix)
1512 dounwind(cxix);
1513
3280af22 1514 POPBLOCK(cx,PL_curpm);
6b35e009 1515 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1516 if (!message)
349d4f2f 1517 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1518 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1519 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1520 my_exit(1);
1521 }
1522 POPEVAL(cx);
1523
1524 if (gimme == G_SCALAR)
3280af22
NIS
1525 *++newsp = &PL_sv_undef;
1526 PL_stack_sp = newsp;
a0d0e21e
LW
1527
1528 LEAVE;
748a9306 1529
7fb6a879
GS
1530 /* LEAVE could clobber PL_curcop (see save_re_context())
1531 * XXX it might be better to find a way to avoid messing with
1532 * PL_curcop in save_re_context() instead, but this is a more
1533 * minimal fix --GSAR */
1534 PL_curcop = cx->blk_oldcop;
1535
7a2e2cd6 1536 if (optype == OP_REQUIRE) {
44f8325f 1537 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1538 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1539 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1540 &PL_sv_undef, 0);
5a844595
GS
1541 DIE(aTHX_ "%sCompilation failed in require",
1542 *msg ? msg : "Unknown error\n");
7a2e2cd6 1543 }
f39bc417
DM
1544 assert(CxTYPE(cx) == CXt_EVAL);
1545 return cx->blk_eval.retop;
a0d0e21e
LW
1546 }
1547 }
9cc2fdd3 1548 if (!message)
349d4f2f 1549 message = SvPVx_const(ERRSV, msglen);
87582a92 1550
7ff03255 1551 write_to_stderr(message, msglen);
f86702cc
PP
1552 my_failure_exit();
1553 /* NOTREACHED */
a0d0e21e
LW
1554 return 0;
1555}
1556
1557PP(pp_xor)
1558{
97aff369 1559 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1560 if (SvTRUE(left) != SvTRUE(right))
1561 RETSETYES;
1562 else
1563 RETSETNO;
1564}
1565
a0d0e21e
LW
1566PP(pp_caller)
1567{
97aff369 1568 dVAR;
39644a26 1569 dSP;
a0d0e21e 1570 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1571 register const PERL_CONTEXT *cx;
1572 register const PERL_CONTEXT *ccstack = cxstack;
1573 const PERL_SI *top_si = PL_curstackinfo;
54310121 1574 I32 gimme;
06b5626a 1575 const char *stashname;
a0d0e21e
LW
1576 I32 count = 0;
1577
1578 if (MAXARG)
1579 count = POPi;
27d41816 1580
a0d0e21e 1581 for (;;) {
2c375eb9
GS
1582 /* we may be in a higher stacklevel, so dig down deeper */
1583 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1584 top_si = top_si->si_prev;
1585 ccstack = top_si->si_cxstack;
1586 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1587 }
a0d0e21e 1588 if (cxix < 0) {
27d41816
DM
1589 if (GIMME != G_ARRAY) {
1590 EXTEND(SP, 1);
a0d0e21e 1591 RETPUSHUNDEF;
27d41816 1592 }
a0d0e21e
LW
1593 RETURN;
1594 }
f2a7f298 1595 /* caller() should not report the automatic calls to &DB::sub */
1596 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1597 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1598 count++;
1599 if (!count--)
1600 break;
2c375eb9 1601 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1602 }
2c375eb9
GS
1603
1604 cx = &ccstack[cxix];
7766f137 1605 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1606 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1607 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1608 field below is defined for any cx. */
f2a7f298 1609 /* caller() should not report the automatic calls to &DB::sub */
1610 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1611 cx = &ccstack[dbcxix];
06a5b730
PP
1612 }
1613
ed094faf 1614 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1615 if (GIMME != G_ARRAY) {
27d41816 1616 EXTEND(SP, 1);
ed094faf 1617 if (!stashname)
3280af22 1618 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1619 else {
1620 dTARGET;
ed094faf 1621 sv_setpv(TARG, stashname);
49d8d3a1
MB
1622 PUSHs(TARG);
1623 }
a0d0e21e
LW
1624 RETURN;
1625 }
a0d0e21e 1626
b3ca2e83 1627 EXTEND(SP, 11);
27d41816 1628
ed094faf 1629 if (!stashname)
3280af22 1630 PUSHs(&PL_sv_undef);
49d8d3a1 1631 else
ed094faf 1632 PUSHs(sv_2mortal(newSVpv(stashname, 0)));
248c2a4d 1633 PUSHs(sv_2mortal(newSVpv(OutCopFILE(cx->blk_oldcop), 0)));
57843af0 1634 PUSHs(sv_2mortal(newSViv((I32)CopLINE(cx->blk_oldcop))));
a0d0e21e
LW
1635 if (!MAXARG)
1636 RETURN;
7766f137 1637 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1638 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1639 /* So is ccstack[dbcxix]. */
07b8c804 1640 if (isGV(cvgv)) {
561b68a9 1641 SV * const sv = newSV(0);
c445ea15 1642 gv_efullname3(sv, cvgv, NULL);
07b8c804 1643 PUSHs(sv_2mortal(sv));
cc8d50a7 1644 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804
RGS
1645 }
1646 else {
396482e1 1647 PUSHs(sv_2mortal(newSVpvs("(unknown)")));
cc8d50a7 1648 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804 1649 }
a0d0e21e
LW
1650 }
1651 else {
396482e1 1652 PUSHs(sv_2mortal(newSVpvs("(eval)")));
a0d0e21e
LW
1653 PUSHs(sv_2mortal(newSViv(0)));
1654 }
54310121
PP
1655 gimme = (I32)cx->blk_gimme;
1656 if (gimme == G_VOID)
3280af22 1657 PUSHs(&PL_sv_undef);
54310121
PP
1658 else
1659 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
6b35e009 1660 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1661 /* eval STRING */
06a5b730 1662 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1663 PUSHs(cx->blk_eval.cur_text);
3280af22 1664 PUSHs(&PL_sv_no);
0f79a09d 1665 }
811a4de9 1666 /* require */
0f79a09d
GS
1667 else if (cx->blk_eval.old_namesv) {
1668 PUSHs(sv_2mortal(newSVsv(cx->blk_eval.old_namesv)));
3280af22 1669 PUSHs(&PL_sv_yes);
06a5b730 1670 }
811a4de9
GS
1671 /* eval BLOCK (try blocks have old_namesv == 0) */
1672 else {
1673 PUSHs(&PL_sv_undef);
1674 PUSHs(&PL_sv_undef);
1675 }
4633a7c4 1676 }
a682de96
GS
1677 else {
1678 PUSHs(&PL_sv_undef);
1679 PUSHs(&PL_sv_undef);
1680 }
cc8d50a7 1681 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
ed094faf 1682 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1683 {
66a1b24b
AL
1684 AV * const ary = cx->blk_sub.argarray;
1685 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1686
3280af22 1687 if (!PL_dbargs) {
71315bf2 1688 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1689 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1690 GvMULTI_on(tmpgv);
3ddcf04c 1691 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1692 }
1693
3280af22
NIS
1694 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1695 av_extend(PL_dbargs, AvFILLp(ary) + off);
1696 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1697 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1698 }
f3aa04c2
GS
1699 /* XXX only hints propagated via op_private are currently
1700 * visible (others are not easily accessible, since they
1701 * use the global PL_hints) */
623e6609 1702 PUSHs(sv_2mortal(newSViv(CopHINTS_get(cx->blk_oldcop))));
e476b1b5
GS
1703 {
1704 SV * mask ;
72dc9ed5 1705 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1706
ac27b0f5 1707 if (old_warnings == pWARN_NONE ||
114bafba 1708 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1709 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1710 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1711 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1712 /* Get the bit mask for $warnings::Bits{all}, because
1713 * it could have been extended by warnings::register */
1714 SV **bits_all;
0bd48802 1715 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1716 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1717 mask = newSVsv(*bits_all);
1718 }
1719 else {
1720 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1721 }
1722 }
e476b1b5 1723 else
72dc9ed5 1724 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
e476b1b5
GS
1725 PUSHs(sv_2mortal(mask));
1726 }
b3ca2e83 1727
c28fe1ec 1728 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1729 sv_2mortal(newRV_noinc(
c28fe1ec
NC
1730 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1731 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1732 : &PL_sv_undef);
a0d0e21e
LW
1733 RETURN;
1734}
1735
a0d0e21e
LW
1736PP(pp_reset)
1737{
97aff369 1738 dVAR;
39644a26 1739 dSP;
10edeb5d 1740 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1741 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1742 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1743 RETURN;
1744}
1745
dd2155a4
DM
1746/* like pp_nextstate, but used instead when the debugger is active */
1747
a0d0e21e
LW
1748PP(pp_dbstate)
1749{
27da23d5 1750 dVAR;
533c011a 1751 PL_curcop = (COP*)PL_op;
a0d0e21e 1752 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1753 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1754 FREETMPS;
1755
5df8de69
DM
1756 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1757 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1758 {
39644a26 1759 dSP;
c09156bb 1760 register PERL_CONTEXT *cx;
f54cb97a 1761 const I32 gimme = G_ARRAY;
eb160463 1762 U8 hasargs;
0bd48802
AL
1763 GV * const gv = PL_DBgv;
1764 register CV * const cv = GvCV(gv);
a0d0e21e 1765
a0d0e21e 1766 if (!cv)
cea2e8a9 1767 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1768
aea4f609
DM
1769 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1770 /* don't do recursive DB::DB call */
a0d0e21e 1771 return NORMAL;
748a9306 1772
4633a7c4
LW
1773 ENTER;
1774 SAVETMPS;
1775
3280af22 1776 SAVEI32(PL_debug);
55497cff 1777 SAVESTACK_POS();
3280af22 1778 PL_debug = 0;
748a9306 1779 hasargs = 0;
924508f0 1780 SPAGAIN;
748a9306 1781
aed2304a 1782 if (CvISXSUB(cv)) {
c127bd3a
SF
1783 CvDEPTH(cv)++;
1784 PUSHMARK(SP);
1785 (void)(*CvXSUB(cv))(aTHX_ cv);
1786 CvDEPTH(cv)--;
1787 FREETMPS;
1788 LEAVE;
1789 return NORMAL;
1790 }
1791 else {
1792 PUSHBLOCK(cx, CXt_SUB, SP);
1793 PUSHSUB_DB(cx);
1794 cx->blk_sub.retop = PL_op->op_next;
1795 CvDEPTH(cv)++;
1796 SAVECOMPPAD();
1797 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1798 RETURNOP(CvSTART(cv));
1799 }
a0d0e21e
LW
1800 }
1801 else
1802 return NORMAL;
1803}
1804
a0d0e21e
LW
1805PP(pp_enteriter)
1806{
27da23d5 1807 dVAR; dSP; dMARK;
c09156bb 1808 register PERL_CONTEXT *cx;
f54cb97a 1809 const I32 gimme = GIMME_V;
a0d0e21e 1810 SV **svp;
df43650b 1811 U16 cxtype = CXt_LOOP | CXp_FOREACH;
7766f137
GS
1812#ifdef USE_ITHREADS
1813 void *iterdata;
1814#endif
a0d0e21e 1815
4633a7c4
LW
1816 ENTER;
1817 SAVETMPS;
1818
533c011a 1819 if (PL_op->op_targ) {
14f338dc
DM
1820 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1821 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1822 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1823 SVs_PADSTALE, SVs_PADSTALE);
1824 }
c3564e5c 1825#ifndef USE_ITHREADS
dd2155a4 1826 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
54b9620d 1827 SAVESPTR(*svp);
c3564e5c
GS
1828#else
1829 SAVEPADSV(PL_op->op_targ);
cbfa9890 1830 iterdata = INT2PTR(void*, PL_op->op_targ);
7766f137
GS
1831 cxtype |= CXp_PADVAR;
1832#endif
54b9620d
MB
1833 }
1834 else {
0bd48802 1835 GV * const gv = (GV*)POPs;
7766f137 1836 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1837 SAVEGENERICSV(*svp);
561b68a9 1838 *svp = newSV(0);
7766f137
GS
1839#ifdef USE_ITHREADS
1840 iterdata = (void*)gv;
1841#endif
54b9620d 1842 }
4633a7c4 1843
0d863452
RH
1844 if (PL_op->op_private & OPpITER_DEF)
1845 cxtype |= CXp_FOR_DEF;
1846
a0d0e21e
LW
1847 ENTER;
1848
7766f137
GS
1849 PUSHBLOCK(cx, cxtype, SP);
1850#ifdef USE_ITHREADS
1851 PUSHLOOP(cx, iterdata, MARK);
1852#else
a0d0e21e 1853 PUSHLOOP(cx, svp, MARK);
7766f137 1854#endif
533c011a 1855 if (PL_op->op_flags & OPf_STACKED) {
44a8e56a 1856 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
89ea2908
GA
1857 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1858 dPOPss;
0bd48802 1859 SV * const right = (SV*)cx->blk_loop.iterary;
984a4bea
RD
1860 SvGETMAGIC(sv);
1861 SvGETMAGIC(right);
4fe3f0fa
MHM
1862 if (RANGE_IS_NUMERIC(sv,right)) {
1863 if ((SvOK(sv) && SvNV(sv) < IV_MIN) ||
1864 (SvOK(right) && SvNV(right) >= IV_MAX))
076d9a11
MHM
1865 DIE(aTHX_ "Range iterator outside integer range");
1866 cx->blk_loop.iterix = SvIV(sv);
4fe3f0fa 1867 cx->blk_loop.itermax = SvIV(right);
d4665a05
DM
1868#ifdef DEBUGGING
1869 /* for correct -Dstv display */
1870 cx->blk_oldsp = sp - PL_stack_base;
1871#endif
89ea2908 1872 }
3f63a782 1873 else {
89ea2908 1874 cx->blk_loop.iterlval = newSVsv(sv);
13c5b33c 1875 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
10516c54 1876 (void) SvPV_nolen_const(right);
3f63a782 1877 }
89ea2908 1878 }
ef3e5ea9 1879 else if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1880 cx->blk_loop.itermax = 0;
1881 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary) + 1;
ef3e5ea9
NC
1882
1883 }
89ea2908 1884 }
4633a7c4 1885 else {
3280af22
NIS
1886 cx->blk_loop.iterary = PL_curstack;
1887 AvFILLp(PL_curstack) = SP - PL_stack_base;
ef3e5ea9 1888 if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1889 cx->blk_loop.itermax = MARK - PL_stack_base + 1;
1890 cx->blk_loop.iterix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1891 }
1892 else {
1893 cx->blk_loop.iterix = MARK - PL_stack_base;
1894 }
4633a7c4 1895 }
a0d0e21e
LW
1896
1897 RETURN;
1898}
1899
1900PP(pp_enterloop)
1901{
27da23d5 1902 dVAR; dSP;
c09156bb 1903 register PERL_CONTEXT *cx;
f54cb97a 1904 const I32 gimme = GIMME_V;
a0d0e21e
LW
1905
1906 ENTER;
1907 SAVETMPS;
1908 ENTER;
1909
1910 PUSHBLOCK(cx, CXt_LOOP, SP);
1911 PUSHLOOP(cx, 0, SP);
1912
1913 RETURN;
1914}
1915
1916PP(pp_leaveloop)
1917{
27da23d5 1918 dVAR; dSP;
c09156bb 1919 register PERL_CONTEXT *cx;
a0d0e21e
LW
1920 I32 gimme;
1921 SV **newsp;
1922 PMOP *newpm;
1923 SV **mark;
1924
1925 POPBLOCK(cx,newpm);
3a1b2b9e 1926 assert(CxTYPE(cx) == CXt_LOOP);
4fdae800 1927 mark = newsp;
a8bba7fa 1928 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1929
a1f49e72 1930 TAINT_NOT;
54310121 1931 if (gimme == G_VOID)
6f207bd3 1932 NOOP;
54310121
PP
1933 else if (gimme == G_SCALAR) {
1934 if (mark < SP)
1935 *++newsp = sv_mortalcopy(*SP);
1936 else
3280af22 1937 *++newsp = &PL_sv_undef;
a0d0e21e
LW
1938 }
1939 else {
a1f49e72 1940 while (mark < SP) {
a0d0e21e 1941 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
1942 TAINT_NOT; /* Each item is independent */
1943 }
a0d0e21e 1944 }
f86702cc
PP
1945 SP = newsp;
1946 PUTBACK;
1947
a8bba7fa 1948 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 1949 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 1950
a0d0e21e
LW
1951 LEAVE;
1952 LEAVE;
1953
f86702cc 1954 return NORMAL;
a0d0e21e
LW
1955}
1956
1957PP(pp_return)
1958{
27da23d5 1959 dVAR; dSP; dMARK;
c09156bb 1960 register PERL_CONTEXT *cx;
f86702cc 1961 bool popsub2 = FALSE;
b45de488 1962 bool clear_errsv = FALSE;
a0d0e21e
LW
1963 I32 gimme;
1964 SV **newsp;
1965 PMOP *newpm;
1966 I32 optype = 0;
b0d9ce38 1967 SV *sv;
f39bc417 1968 OP *retop;
a0d0e21e 1969
0bd48802
AL
1970 const I32 cxix = dopoptosub(cxstack_ix);
1971
9850bf21
RH
1972 if (cxix < 0) {
1973 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
1974 * sort block, which is a CXt_NULL
1975 * not a CXt_SUB */
1976 dounwind(0);
d7507f74
RH
1977 PL_stack_base[1] = *PL_stack_sp;
1978 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
1979 return 0;
1980 }
9850bf21
RH
1981 else
1982 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 1983 }
a0d0e21e
LW
1984 if (cxix < cxstack_ix)
1985 dounwind(cxix);
1986
d7507f74
RH
1987 if (CxMULTICALL(&cxstack[cxix])) {
1988 gimme = cxstack[cxix].blk_gimme;
1989 if (gimme == G_VOID)
1990 PL_stack_sp = PL_stack_base;
1991 else if (gimme == G_SCALAR) {
1992 PL_stack_base[1] = *PL_stack_sp;
1993 PL_stack_sp = PL_stack_base + 1;
1994 }
9850bf21 1995 return 0;
d7507f74 1996 }
9850bf21 1997
a0d0e21e 1998 POPBLOCK(cx,newpm);
6b35e009 1999 switch (CxTYPE(cx)) {
a0d0e21e 2000 case CXt_SUB:
f86702cc 2001 popsub2 = TRUE;
f39bc417 2002 retop = cx->blk_sub.retop;
5dd42e15 2003 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2004 break;
2005 case CXt_EVAL:
b45de488
GS
2006 if (!(PL_in_eval & EVAL_KEEPERR))
2007 clear_errsv = TRUE;
a0d0e21e 2008 POPEVAL(cx);
f39bc417 2009 retop = cx->blk_eval.retop;
1d76a5c3
GS
2010 if (CxTRYBLOCK(cx))
2011 break;
067f92a0 2012 lex_end();
748a9306
LW
2013 if (optype == OP_REQUIRE &&
2014 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2015 {
54310121 2016 /* Unassume the success we assumed earlier. */
901017d6 2017 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2018 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2019 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2020 }
a0d0e21e 2021 break;
7766f137
GS
2022 case CXt_FORMAT:
2023 POPFORMAT(cx);
f39bc417 2024 retop = cx->blk_sub.retop;
7766f137 2025 break;
a0d0e21e 2026 default:
cea2e8a9 2027 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2028 }
2029
a1f49e72 2030 TAINT_NOT;
a0d0e21e 2031 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2032 if (MARK < SP) {
2033 if (popsub2) {
a8bba7fa 2034 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2035 if (SvTEMP(TOPs)) {
2036 *++newsp = SvREFCNT_inc(*SP);
2037 FREETMPS;
2038 sv_2mortal(*newsp);
959e3673
GS
2039 }
2040 else {
2041 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2042 FREETMPS;
959e3673
GS
2043 *++newsp = sv_mortalcopy(sv);
2044 SvREFCNT_dec(sv);
a29cdaf0 2045 }
959e3673
GS
2046 }
2047 else
a29cdaf0 2048 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2049 }
2050 else
a29cdaf0 2051 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2052 }
2053 else
3280af22 2054 *++newsp = &PL_sv_undef;
a0d0e21e 2055 }
54310121 2056 else if (gimme == G_ARRAY) {
a1f49e72 2057 while (++MARK <= SP) {
f86702cc
PP
2058 *++newsp = (popsub2 && SvTEMP(*MARK))
2059 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2060 TAINT_NOT; /* Each item is independent */
2061 }
a0d0e21e 2062 }
3280af22 2063 PL_stack_sp = newsp;
a0d0e21e 2064
5dd42e15 2065 LEAVE;
f86702cc
PP
2066 /* Stack values are safe: */
2067 if (popsub2) {
5dd42e15 2068 cxstack_ix--;
b0d9ce38 2069 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2070 }
b0d9ce38 2071 else
c445ea15 2072 sv = NULL;
3280af22 2073 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2074
b0d9ce38 2075 LEAVESUB(sv);
b45de488 2076 if (clear_errsv)
c69006e4 2077 sv_setpvn(ERRSV,"",0);
f39bc417 2078 return retop;
a0d0e21e
LW
2079}
2080
2081PP(pp_last)
2082{
27da23d5 2083 dVAR; dSP;
a0d0e21e 2084 I32 cxix;
c09156bb 2085 register PERL_CONTEXT *cx;
f86702cc 2086 I32 pop2 = 0;
a0d0e21e 2087 I32 gimme;
8772537c 2088 I32 optype;
a0d0e21e
LW
2089 OP *nextop;
2090 SV **newsp;
2091 PMOP *newpm;
a8bba7fa 2092 SV **mark;
c445ea15 2093 SV *sv = NULL;
9d4ba2ae 2094
a0d0e21e 2095
533c011a 2096 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2097 cxix = dopoptoloop(cxstack_ix);
2098 if (cxix < 0)
a651a37d 2099 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2100 }
2101 else {
2102 cxix = dopoptolabel(cPVOP->op_pv);
2103 if (cxix < 0)
cea2e8a9 2104 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2105 }
2106 if (cxix < cxstack_ix)
2107 dounwind(cxix);
2108
2109 POPBLOCK(cx,newpm);
5dd42e15 2110 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2111 mark = newsp;
6b35e009 2112 switch (CxTYPE(cx)) {
a0d0e21e 2113 case CXt_LOOP:
f86702cc 2114 pop2 = CXt_LOOP;
a8bba7fa 2115 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2116 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2117 break;
f86702cc 2118 case CXt_SUB:
f86702cc 2119 pop2 = CXt_SUB;
f39bc417 2120 nextop = cx->blk_sub.retop;
a0d0e21e 2121 break;
f86702cc
PP
2122 case CXt_EVAL:
2123 POPEVAL(cx);
f39bc417 2124 nextop = cx->blk_eval.retop;
a0d0e21e 2125 break;
7766f137
GS
2126 case CXt_FORMAT:
2127 POPFORMAT(cx);
f39bc417 2128 nextop = cx->blk_sub.retop;
7766f137 2129 break;
a0d0e21e 2130 default:
cea2e8a9 2131 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2132 }
2133
a1f49e72 2134 TAINT_NOT;
a0d0e21e 2135 if (gimme == G_SCALAR) {
f86702cc
PP
2136 if (MARK < SP)
2137 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2138 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2139 else
3280af22 2140 *++newsp = &PL_sv_undef;
a0d0e21e 2141 }
54310121 2142 else if (gimme == G_ARRAY) {
a1f49e72 2143 while (++MARK <= SP) {
f86702cc
PP
2144 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2145 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2146 TAINT_NOT; /* Each item is independent */
2147 }
f86702cc
PP
2148 }
2149 SP = newsp;
2150 PUTBACK;
2151
5dd42e15
DM
2152 LEAVE;
2153 cxstack_ix--;
f86702cc
PP
2154 /* Stack values are safe: */
2155 switch (pop2) {
2156 case CXt_LOOP:
a8bba7fa 2157 POPLOOP(cx); /* release loop vars ... */
4fdae800 2158 LEAVE;
f86702cc
PP
2159 break;
2160 case CXt_SUB:
b0d9ce38 2161 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2162 break;
a0d0e21e 2163 }
3280af22 2164 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2165
b0d9ce38 2166 LEAVESUB(sv);
9d4ba2ae
AL
2167 PERL_UNUSED_VAR(optype);
2168 PERL_UNUSED_VAR(gimme);
f86702cc 2169 return nextop;
a0d0e21e
LW
2170}
2171
2172PP(pp_next)
2173{
27da23d5 2174 dVAR;
a0d0e21e 2175 I32 cxix;
c09156bb 2176 register PERL_CONTEXT *cx;
85538317 2177 I32 inner;
a0d0e21e 2178
533c011a 2179 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2180 cxix = dopoptoloop(cxstack_ix);
2181 if (cxix < 0)
a651a37d 2182 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2183 }
2184 else {
2185 cxix = dopoptolabel(cPVOP->op_pv);
2186 if (cxix < 0)
cea2e8a9 2187 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2188 }
2189 if (cxix < cxstack_ix)
2190 dounwind(cxix);
2191
85538317
GS
2192 /* clear off anything above the scope we're re-entering, but
2193 * save the rest until after a possible continue block */
2194 inner = PL_scopestack_ix;
1ba6ee2b 2195 TOPBLOCK(cx);
85538317
GS
2196 if (PL_scopestack_ix < inner)
2197 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2198 PL_curcop = cx->blk_oldcop;
022eaa24 2199 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2200}
2201
2202PP(pp_redo)
2203{
27da23d5 2204 dVAR;
a0d0e21e 2205 I32 cxix;
c09156bb 2206 register PERL_CONTEXT *cx;
a0d0e21e 2207 I32 oldsave;
a034e688 2208 OP* redo_op;
a0d0e21e 2209
533c011a 2210 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2211 cxix = dopoptoloop(cxstack_ix);
2212 if (cxix < 0)
a651a37d 2213 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2214 }
2215 else {
2216 cxix = dopoptolabel(cPVOP->op_pv);
2217 if (cxix < 0)
cea2e8a9 2218 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2219 }
2220 if (cxix < cxstack_ix)
2221 dounwind(cxix);
2222
022eaa24 2223 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2224 if (redo_op->op_type == OP_ENTER) {
2225 /* pop one less context to avoid $x being freed in while (my $x..) */
2226 cxstack_ix++;
2227 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2228 redo_op = redo_op->op_next;
2229 }
2230
a0d0e21e 2231 TOPBLOCK(cx);
3280af22 2232 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2233 LEAVE_SCOPE(oldsave);
936c78b5 2234 FREETMPS;
3a1b2b9e 2235 PL_curcop = cx->blk_oldcop;
a034e688 2236 return redo_op;
a0d0e21e
LW
2237}
2238
0824fdcb 2239STATIC OP *
bfed75c6 2240S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2241{
97aff369 2242 dVAR;
a0d0e21e 2243 OP **ops = opstack;
bfed75c6 2244 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2245
fc36a67e 2246 if (ops >= oplimit)
cea2e8a9 2247 Perl_croak(aTHX_ too_deep);
11343788
MB
2248 if (o->op_type == OP_LEAVE ||
2249 o->op_type == OP_SCOPE ||
2250 o->op_type == OP_LEAVELOOP ||
33d34e4c 2251 o->op_type == OP_LEAVESUB ||
11343788 2252 o->op_type == OP_LEAVETRY)
fc36a67e 2253 {
5dc0d613 2254 *ops++ = cUNOPo->op_first;
fc36a67e 2255 if (ops >= oplimit)
cea2e8a9 2256 Perl_croak(aTHX_ too_deep);
fc36a67e 2257 }
c4aa4e48 2258 *ops = 0;
11343788 2259 if (o->op_flags & OPf_KIDS) {
aec46f14 2260 OP *kid;
a0d0e21e 2261 /* First try all the kids at this level, since that's likeliest. */
11343788 2262 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS
2263 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2264 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW
2265 return kid;
2266 }
11343788 2267 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2268 if (kid == PL_lastgotoprobe)
a0d0e21e 2269 continue;
ed8d0fe2
SM
2270 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2271 if (ops == opstack)
2272 *ops++ = kid;
2273 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2274 ops[-1]->op_type == OP_DBSTATE)
2275 ops[-1] = kid;
2276 else
2277 *ops++ = kid;
2278 }
155aba94 2279 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2280 return o;
a0d0e21e
LW
2281 }
2282 }
c4aa4e48 2283 *ops = 0;
a0d0e21e
LW
2284 return 0;
2285}
2286
a0d0e21e
LW
2287PP(pp_goto)
2288{
27da23d5 2289 dVAR; dSP;
cbbf8932 2290 OP *retop = NULL;
a0d0e21e 2291 I32 ix;
c09156bb 2292 register PERL_CONTEXT *cx;
fc36a67e
PP
2293#define GOTO_DEPTH 64
2294 OP *enterops[GOTO_DEPTH];
cbbf8932 2295 const char *label = NULL;
bfed75c6
AL
2296 const bool do_dump = (PL_op->op_type == OP_DUMP);
2297 static const char must_have_label[] = "goto must have label";
a0d0e21e 2298
533c011a 2299 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2300 SV * const sv = POPs;
a0d0e21e
LW
2301
2302 /* This egregious kludge implements goto &subroutine */
2303 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2304 I32 cxix;
c09156bb 2305 register PERL_CONTEXT *cx;
a0d0e21e
LW
2306 CV* cv = (CV*)SvRV(sv);
2307 SV** mark;
2308 I32 items = 0;
2309 I32 oldsave;
b1464ded 2310 bool reified = 0;
a0d0e21e 2311
e8f7dd13 2312 retry:
4aa0a1f7 2313 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2314 const GV * const gv = CvGV(cv);
e8f7dd13 2315 if (gv) {
7fc63493 2316 GV *autogv;
e8f7dd13
GS
2317 SV *tmpstr;
2318 /* autoloaded stub? */
2319 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2320 goto retry;
2321 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2322 GvNAMELEN(gv), FALSE);
2323 if (autogv && (cv = GvCV(autogv)))
2324 goto retry;
2325 tmpstr = sv_newmortal();
c445ea15 2326 gv_efullname3(tmpstr, gv, NULL);
be2597df 2327 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2328 }
cea2e8a9 2329 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2330 }
2331
a0d0e21e 2332 /* First do some returnish stuff. */
b37c2d43 2333 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2334 FREETMPS;
a0d0e21e
LW
2335 cxix = dopoptosub(cxstack_ix);
2336 if (cxix < 0)
cea2e8a9 2337 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2338 if (cxix < cxstack_ix)
2339 dounwind(cxix);
2340 TOPBLOCK(cx);
2d43a17f 2341 SPAGAIN;
564abe23 2342 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2343 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2344 if (CxREALEVAL(cx))
2345 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2346 else
2347 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2348 }
9850bf21
RH
2349 else if (CxMULTICALL(cx))
2350 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
cc8d50a7 2351 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
d8b46c1b 2352 /* put @_ back onto stack */
a0d0e21e 2353 AV* av = cx->blk_sub.argarray;
bfed75c6 2354
93965878 2355 items = AvFILLp(av) + 1;
a45cdc79
DM
2356 EXTEND(SP, items+1); /* @_ could have been extended. */
2357 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2358 SvREFCNT_dec(GvAV(PL_defgv));
2359 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2360 CLEAR_ARGARRAY(av);
d8b46c1b 2361 /* abandon @_ if it got reified */
62b1ebc2 2362 if (AvREAL(av)) {
b1464ded
DM
2363 reified = 1;
2364 SvREFCNT_dec(av);
d8b46c1b
GS
2365 av = newAV();
2366 av_extend(av, items-1);
11ca45c0 2367 AvREIFY_only(av);
dd2155a4 2368 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2369 }
a0d0e21e 2370 }
aed2304a 2371 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2372 AV* const av = GvAV(PL_defgv);
1fa4e549 2373 items = AvFILLp(av) + 1;
a45cdc79
DM
2374 EXTEND(SP, items+1); /* @_ could have been extended. */
2375 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2376 }
a45cdc79
DM
2377 mark = SP;
2378 SP += items;
6b35e009 2379 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2380 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2381 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2382 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2383 LEAVE_SCOPE(oldsave);
2384
2385 /* Now do some callish stuff. */
2386 SAVETMPS;
5023d17a 2387 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2388 if (CvISXSUB(cv)) {
b37c2d43 2389 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2390 SV **newsp;
2391 I32 gimme;
b1464ded
DM
2392 if (reified) {
2393 I32 index;
2394 for (index=0; index<items; index++)
2395 sv_2mortal(SP[-index]);
2396 }
1fa4e549 2397
b37c2d43
AL
2398 /* XS subs don't have a CxSUB, so pop it */
2399 POPBLOCK(cx, PL_curpm);
2400 /* Push a mark for the start of arglist */
2401 PUSHMARK(mark);
2402 PUTBACK;
2403 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2404 LEAVE;
5eff7df7 2405 return retop;
a0d0e21e
LW
2406 }
2407 else {
b37c2d43 2408 AV* const padlist = CvPADLIST(cv);
6b35e009 2409 if (CxTYPE(cx) == CXt_EVAL) {
3280af22
NIS
2410 PL_in_eval = cx->blk_eval.old_in_eval;
2411 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2412 cx->cx_type = CXt_SUB;
cc8d50a7 2413 cx->blk_sub.hasargs = 0;
b150fb22 2414 }
a0d0e21e 2415 cx->blk_sub.cv = cv;
1a5b3db4 2416 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2417
a0d0e21e
LW
2418 CvDEPTH(cv)++;
2419 if (CvDEPTH(cv) < 2)
74c765eb 2420 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2421 else {
599cee73 2422 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
44a8e56a 2423 sub_crush_depth(cv);
26019298 2424 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2425 }
fd617465
DM
2426 SAVECOMPPAD();
2427 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
cc8d50a7 2428 if (cx->blk_sub.hasargs)
6d4ff0d2 2429 {
b37c2d43 2430 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2431
3280af22 2432 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2433 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2434 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2435 cx->blk_sub.argarray = av;
a0d0e21e
LW
2436
2437 if (items >= AvMAX(av) + 1) {
b37c2d43 2438 SV **ary = AvALLOC(av);
a0d0e21e
LW
2439 if (AvARRAY(av) != ary) {
2440 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2441 AvARRAY(av) = ary;
a0d0e21e
LW
2442 }
2443 if (items >= AvMAX(av) + 1) {
2444 AvMAX(av) = items - 1;
2445 Renew(ary,items+1,SV*);
2446 AvALLOC(av) = ary;
9c6bc640 2447 AvARRAY(av) = ary;
a0d0e21e
LW
2448 }
2449 }
a45cdc79 2450 ++mark;
a0d0e21e 2451 Copy(mark,AvARRAY(av),items,SV*);
93965878 2452 AvFILLp(av) = items - 1;
d8b46c1b 2453 assert(!AvREAL(av));
b1464ded
DM
2454 if (reified) {
2455 /* transfer 'ownership' of refcnts to new @_ */
2456 AvREAL_on(av);
2457 AvREIFY_off(av);
2458 }
a0d0e21e
LW
2459 while (items--) {
2460 if (*mark)
2461 SvTEMP_off(*mark);
2462 mark++;
2463 }
2464 }
491527d0 2465 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2466 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL
2467 if (PERLDB_GOTO) {
2468 CV * const gotocv = get_cv("DB::goto", FALSE);
2469 if (gotocv) {
2470 PUSHMARK( PL_stack_sp );
2471 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2472 PL_stack_sp--;
2473 }
491527d0 2474 }
1ce6579f 2475 }
a0d0e21e
LW
2476 RETURNOP(CvSTART(cv));
2477 }
2478 }
1614b0e3 2479 else {
0510663f 2480 label = SvPV_nolen_const(sv);
1614b0e3 2481 if (!(do_dump || *label))
cea2e8a9 2482 DIE(aTHX_ must_have_label);
1614b0e3 2483 }
a0d0e21e 2484 }
533c011a 2485 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2486 if (! do_dump)
cea2e8a9 2487 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2488 }
2489 else
2490 label = cPVOP->op_pv;
2491
2492 if (label && *label) {
cbbf8932 2493 OP *gotoprobe = NULL;
3b2447bc 2494 bool leaving_eval = FALSE;
33d34e4c 2495 bool in_block = FALSE;
cbbf8932 2496 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2497
2498 /* find label */
2499
d4c19fe8 2500 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2501 *enterops = 0;
2502 for (ix = cxstack_ix; ix >= 0; ix--) {
2503 cx = &cxstack[ix];
6b35e009 2504 switch (CxTYPE(cx)) {
a0d0e21e 2505 case CXt_EVAL:
3b2447bc 2506 leaving_eval = TRUE;
971ecbe6 2507 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2508 gotoprobe = (last_eval_cx ?
2509 last_eval_cx->blk_eval.old_eval_root :
2510 PL_eval_root);
2511 last_eval_cx = cx;
9c5794fe
RH
2512 break;
2513 }
2514 /* else fall through */
a0d0e21e
LW
2515 case CXt_LOOP:
2516 gotoprobe = cx->blk_oldcop->op_sibling;
2517 break;
2518 case CXt_SUBST:
2519 continue;
2520 case CXt_BLOCK:
33d34e4c 2521 if (ix) {
a0d0e21e 2522 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2523 in_block = TRUE;
2524 } else
3280af22 2525 gotoprobe = PL_main_root;
a0d0e21e 2526 break;
b3933176 2527 case CXt_SUB:
9850bf21 2528 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2529 gotoprobe = CvROOT(cx->blk_sub.cv);
2530 break;
2531 }
2532 /* FALL THROUGH */
7766f137 2533 case CXt_FORMAT:
0a753a76 2534 case CXt_NULL:
a651a37d 2535 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2536 default:
2537 if (ix)
cea2e8a9 2538 DIE(aTHX_ "panic: goto");
3280af22 2539 gotoprobe = PL_main_root;
a0d0e21e
LW
2540 break;
2541 }
2b597662
GS
2542 if (gotoprobe) {
2543 retop = dofindlabel(gotoprobe, label,
2544 enterops, enterops + GOTO_DEPTH);
2545 if (retop)
2546 break;
2547 }
3280af22 2548 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2549 }
2550 if (!retop)
cea2e8a9 2551 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2552
3b2447bc
RH
2553 /* if we're leaving an eval, check before we pop any frames
2554 that we're not going to punt, otherwise the error
2555 won't be caught */
2556
2557 if (leaving_eval && *enterops && enterops[1]) {
2558 I32 i;
2559 for (i = 1; enterops[i]; i++)
2560 if (enterops[i]->op_type == OP_ENTERITER)
2561 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2562 }
2563
a0d0e21e
LW
2564 /* pop unwanted frames */
2565
2566 if (ix < cxstack_ix) {
2567 I32 oldsave;
2568
2569 if (ix < 0)
2570 ix = 0;
2571 dounwind(ix);
2572 TOPBLOCK(cx);
3280af22 2573 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2574 LEAVE_SCOPE(oldsave);
2575 }
2576
2577 /* push wanted frames */
2578
748a9306 2579 if (*enterops && enterops[1]) {
0bd48802 2580 OP * const oldop = PL_op;
33d34e4c
AE
2581 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2582 for (; enterops[ix]; ix++) {
533c011a 2583 PL_op = enterops[ix];
84902520
TB
2584 /* Eventually we may want to stack the needed arguments
2585 * for each op. For now, we punt on the hard ones. */
533c011a 2586 if (PL_op->op_type == OP_ENTERITER)
894356b3 2587 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2588 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2589 }
533c011a 2590 PL_op = oldop;
a0d0e21e
LW
2591 }
2592 }
2593
2594 if (do_dump) {
a5f75d66 2595#ifdef VMS
6b88bc9c 2596 if (!retop) retop = PL_main_start;
a5f75d66 2597#endif
3280af22
NIS
2598 PL_restartop = retop;
2599 PL_do_undump = TRUE;
a0d0e21e
LW
2600
2601 my_unexec();
2602
3280af22
NIS
2603 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2604 PL_do_undump = FALSE;
a0d0e21e
LW
2605 }
2606
2607 RETURNOP(retop);
2608}
2609
2610PP(pp_exit)
2611{
97aff369 2612 dVAR;
39644a26 2613 dSP;
a0d0e21e
LW
2614 I32 anum;
2615
2616 if (MAXARG < 1)
2617 anum = 0;
ff0cee69 2618 else {
a0d0e21e 2619 anum = SvIVx(POPs);
d98f61e7
GS
2620#ifdef VMS
2621 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2622 anum = 0;
96e176bf 2623 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2624#endif
2625 }
cc3604b1 2626 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2627#ifdef PERL_MAD
2628 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2629 if (anum || !(PL_minus_c && PL_madskills))
2630 my_exit(anum);
2631#else
a0d0e21e 2632 my_exit(anum);
81d86705 2633#endif
3280af22 2634 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2635 RETURN;
2636}
2637
a0d0e21e
LW
2638/* Eval. */
2639
0824fdcb 2640STATIC void
cea2e8a9 2641S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2642{
504618e9 2643 const char *s = SvPVX_const(sv);
890ce7af 2644 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2645 I32 line = 1;
a0d0e21e
LW
2646
2647 while (s && s < send) {
f54cb97a 2648 const char *t;
b9f83d2f 2649 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2650
a0d0e21e
LW
2651 t = strchr(s, '\n');
2652 if (t)
2653 t++;
2654 else
2655 t = send;
2656
2657 sv_setpvn(tmpstr, s, t - s);
2658 av_store(array, line++, tmpstr);
2659 s = t;
2660 }
2661}
2662
901017d6 2663STATIC void
14dd3ad8
GS
2664S_docatch_body(pTHX)
2665{
97aff369 2666 dVAR;
cea2e8a9 2667 CALLRUNOPS(aTHX);
901017d6 2668 return;
312caa8e
CS
2669}
2670
0824fdcb 2671STATIC OP *
cea2e8a9 2672S_docatch(pTHX_ OP *o)
1e422769 2673{
97aff369 2674 dVAR;
6224f72b 2675 int ret;
06b5626a 2676 OP * const oldop = PL_op;
db36c5a1 2677 dJMPENV;
1e422769 2678
1e422769 2679#ifdef DEBUGGING
54310121 2680 assert(CATCH_GET == TRUE);
1e422769 2681#endif
312caa8e 2682 PL_op = o;
8bffa5f8 2683
14dd3ad8 2684 JMPENV_PUSH(ret);
6224f72b 2685 switch (ret) {
312caa8e 2686 case 0:
abd70938
DM
2687 assert(cxstack_ix >= 0);
2688 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2689 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8
GS
2690 redo_body:
2691 docatch_body();
312caa8e
CS
2692 break;
2693 case 3:
8bffa5f8 2694 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2695
2696 /* NB XXX we rely on the old popped CxEVAL still being at the top
2697 * of the stack; the way die_where() currently works, this
2698 * assumption is valid. In theory The cur_top_env value should be
2699 * returned in another global, the way retop (aka PL_restartop)
2700 * is. */
2701 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2702
2703 if (PL_restartop
2704 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2705 {
312caa8e
CS
2706 PL_op = PL_restartop;
2707 PL_restartop = 0;
2708 goto redo_body;
2709 }
2710 /* FALL THROUGH */
2711 default:
14dd3ad8 2712 JMPENV_POP;
533c011a 2713 PL_op = oldop;
6224f72b 2714 JMPENV_JUMP(ret);
1e422769 2715 /* NOTREACHED */
1e422769 2716 }
14dd3ad8 2717 JMPENV_POP;
533c011a 2718 PL_op = oldop;
5f66b61c 2719 return NULL;
1e422769
PP
2720}
2721
c277df42 2722OP *
bfed75c6 2723Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2724/* sv Text to convert to OP tree. */
2725/* startop op_free() this to undo. */
2726/* code Short string id of the caller. */
2727{
f7997f86 2728 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2729 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2730 PERL_CONTEXT *cx;
2731 SV **newsp;
b094c71d 2732 I32 gimme = G_VOID;
c277df42
IZ
2733 I32 optype;
2734 OP dummy;
83ee9e09
GS
2735 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2736 char *tmpbuf = tbuf;
c277df42 2737 char *safestr;
a3985cdc 2738 int runtime;
601f1833 2739 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2740 STRLEN len;
c277df42
IZ
2741
2742 ENTER;
5486870f 2743 lex_start(sv, NULL, FALSE);
c277df42
IZ
2744 SAVETMPS;
2745 /* switch to eval mode */
2746
923e4eb5 2747 if (IN_PERL_COMPILETIME) {
f4dd75d9 2748 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2749 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2750 }
83ee9e09 2751 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2752 SV * const sv = sv_newmortal();
83ee9e09
GS
2753 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2754 code, (unsigned long)++PL_evalseq,
2755 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2756 tmpbuf = SvPVX(sv);
fc009855 2757 len = SvCUR(sv);
83ee9e09
GS
2758 }
2759 else
d9fad198
JH
2760 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2761 (unsigned long)++PL_evalseq);
f4dd75d9 2762 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2763 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2764 SAVECOPLINE(&PL_compiling);
57843af0 2765 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2766 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2767 deleting the eval's FILEGV from the stash before gv_check() runs
2768 (i.e. before run-time proper). To work around the coredump that
2769 ensues, we always turn GvMULTI_on for any globals that were
2770 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2771 safestr = savepvn(tmpbuf, len);
2772 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2773 SAVEHINTS();
d1ca3daa 2774#ifdef OP_IN_REGISTER
6b88bc9c 2775 PL_opsave = op;
d1ca3daa 2776#else
7766f137 2777 SAVEVPTR(PL_op);
d1ca3daa 2778#endif
c277df42 2779
a3985cdc 2780 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2781 runtime = IN_PERL_RUNTIME;
a3985cdc 2782 if (runtime)
d819b83a 2783 runcv = find_runcv(NULL);
a3985cdc 2784
533c011a 2785 PL_op = &dummy;
13b51b79 2786 PL_op->op_type = OP_ENTEREVAL;
533c011a 2787 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2788 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
a0714e2c 2789 PUSHEVAL(cx, 0, NULL);
a3985cdc
DM
2790
2791 if (runtime)
410be5db 2792 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2793 else
410be5db 2794 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2795 POPBLOCK(cx,PL_curpm);
e84b9f1f 2796 POPEVAL(cx);
c277df42
IZ
2797
2798 (*startop)->op_type = OP_NULL;
22c35a8c 2799 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2800 lex_end();
f3548bdc 2801 /* XXX DAPM do this properly one year */
b37c2d43 2802 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2803 LEAVE;
923e4eb5 2804 if (IN_PERL_COMPILETIME)
623e6609 2805 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2806#ifdef OP_IN_REGISTER
6b88bc9c 2807 op = PL_opsave;
d1ca3daa 2808#endif
9d4ba2ae
AL
2809 PERL_UNUSED_VAR(newsp);
2810 PERL_UNUSED_VAR(optype);
2811
410be5db 2812 return PL_eval_start;
c277df42
IZ
2813}
2814
a3985cdc
DM
2815
2816/*
2817=for apidoc find_runcv
2818
2819Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2820If db_seqp is non_null, skip CVs that are in the DB package and populate
2821*db_seqp with the cop sequence number at the point that the DB:: code was
2822entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2823than in the scope of the debugger itself).
a3985cdc
DM
2824
2825=cut
2826*/
2827
2828CV*
d819b83a 2829Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2830{
97aff369 2831 dVAR;
a3985cdc 2832 PERL_SI *si;
a3985cdc 2833
d819b83a
DM
2834 if (db_seqp)
2835 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2836 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2837 I32 ix;
a3985cdc 2838 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2839 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2840 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2841 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2842 /* skip DB:: code */
2843 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2844 *db_seqp = cx->blk_oldcop->cop_seq;
2845 continue;
2846 }
2847 return cv;
2848 }
a3985cdc
DM
2849 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2850 return PL_compcv;
2851 }
2852 }
2853 return PL_main_cv;
2854}
2855
2856
2857/* Compile a require/do, an eval '', or a /(?{...})/.
2858 * In the last case, startop is non-null, and contains the address of
2859 * a pointer that should be set to the just-compiled code.
2860 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM
2861 * Returns a bool indicating whether the compile was successful; if so,
2862 * PL_eval_start contains the first op of the compiled ocde; otherwise,
2863 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM
2864 */
2865
410be5db 2866STATIC bool
a3985cdc 2867S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2868{
27da23d5 2869 dVAR; dSP;
46c461b5 2870 OP * const saveop = PL_op;
a0d0e21e 2871
6dc8a9e4
IZ
2872 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2873 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2874 : EVAL_INEVAL);
a0d0e21e 2875
1ce6579f
PP
2876 PUSHMARK(SP);
2877
3280af22 2878 SAVESPTR(PL_compcv);
b9f83d2f 2879 PL_compcv = (CV*)newSV_type(SVt_PVCV);
1aff0e91 2880 CvEVAL_on(PL_compcv);
2090ab20
JH
2881 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2882 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2883
a3985cdc 2884 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2885 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2886
dd2155a4 2887 /* set up a scratch pad */
a0d0e21e 2888
dd2155a4 2889 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2890 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2891
07055b4c 2892
81d86705
NC
2893 if (!PL_madskills)
2894 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2895
a0d0e21e
LW
2896 /* make sure we compile in the right package */
2897
ed094faf 2898 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2899 SAVESPTR(PL_curstash);
ed094faf 2900 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2901 }
3c10abe3 2902 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
2903 SAVESPTR(PL_beginav);
2904 PL_beginav = newAV();
2905 SAVEFREESV(PL_beginav);
3c10abe3
AG
2906 SAVESPTR(PL_unitcheckav);
2907 PL_unitcheckav = newAV();
2908 SAVEFREESV(PL_unitcheckav);
a0d0e21e 2909
81d86705 2910#ifdef PERL_MAD
9da243ce 2911 SAVEBOOL(PL_madskills);
81d86705
NC
2912 PL_madskills = 0;
2913#endif
2914
a0d0e21e
LW
2915 /* try to compile it */
2916
5f66b61c 2917 PL_eval_root = NULL;
3280af22 2918 PL_curcop = &PL_compiling;
fc15ae8f 2919 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2920 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2921 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2922 else
c69006e4 2923 sv_setpvn(ERRSV,"",0);
13765c85 2924 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 2925 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2926 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2927 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2928 const char *msg;
bfed75c6 2929
533c011a 2930 PL_op = saveop;
3280af22
NIS
2931 if (PL_eval_root) {
2932 op_free(PL_eval_root);
5f66b61c 2933 PL_eval_root = NULL;
a0d0e21e 2934 }
3280af22 2935 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2936 if (!startop) {
3280af22 2937 POPBLOCK(cx,PL_curpm);
c277df42 2938 POPEVAL(cx);
c277df42 2939 }
a0d0e21e
LW
2940 lex_end();
2941 LEAVE;
9d4ba2ae
AL
2942
2943 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 2944 if (optype == OP_REQUIRE) {
b464bac0 2945 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 2946 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 2947 &PL_sv_undef, 0);
58d3fd3b
SH
2948 Perl_croak(aTHX_ "%sCompilation failed in require",
2949 *msg ? msg : "Unknown error\n");
5a844595
GS
2950 }
2951 else if (startop) {
3280af22 2952 POPBLOCK(cx,PL_curpm);
c277df42 2953 POPEVAL(cx);
5a844595
GS
2954 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2955 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 2956 }
9d7f88dd 2957 else {
9d7f88dd 2958 if (!*msg) {
6502358f 2959 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
2960 }
2961 }
9d4ba2ae 2962 PERL_UNUSED_VAR(newsp);
410be5db
DM
2963 PUSHs(&PL_sv_undef);
2964 PUTBACK;
2965 return FALSE;
a0d0e21e 2966 }
57843af0 2967 CopLINE_set(&PL_compiling, 0);
c277df42 2968 if (startop) {
3280af22 2969 *startop = PL_eval_root;
c277df42 2970 } else
3280af22 2971 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
2972
2973 /* Set the context for this new optree.
2974 * If the last op is an OP_REQUIRE, force scalar context.
2975 * Otherwise, propagate the context from the eval(). */
2976 if (PL_eval_root->op_type == OP_LEAVEEVAL
2977 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
2978 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
2979 == OP_REQUIRE)
2980 scalar(PL_eval_root);
2981 else if (gimme & G_VOID)
3280af22 2982 scalarvoid(PL_eval_root);
54310121 2983 else if (gimme & G_ARRAY)
3280af22 2984 list(PL_eval_root);
a0d0e21e 2985 else
3280af22 2986 scalar(PL_eval_root);
a0d0e21e
LW
2987
2988 DEBUG_x(dump_eval());
2989
55497cff 2990 /* Register with debugger: */
6482a30d 2991 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 2992 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP
2993 if (cv) {
2994 dSP;
924508f0 2995 PUSHMARK(SP);
cc49e20b 2996 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 2997 PUTBACK;
864dbfa3 2998 call_sv((SV*)cv, G_DISCARD);
55497cff
PP
2999 }
3000 }
3001
3c10abe3
AG
3002 if (PL_unitcheckav)
3003 call_list(PL_scopestack_ix, PL_unitcheckav);
3004
a0d0e21e
LW
3005 /* compiled okay, so do it */
3006
3280af22
NIS
3007 CvDEPTH(PL_compcv) = 1;
3008 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3009 PL_op = saveop; /* The caller may need it. */
bc177e6b 3010 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3011
410be5db
DM
3012 PUTBACK;
3013 return TRUE;
a0d0e21e
LW
3014}
3015
a6c40364 3016STATIC PerlIO *
74d5ed12 3017S_check_type_and_open(pTHX_ const char *name, const char *mode)
ce8abf5f
SP
3018{
3019 Stat_t st;
c445ea15 3020 const int st_rc = PerlLIO_stat(name, &st);
df528165 3021
6b845e56 3022 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3023 return NULL;
ce8abf5f
SP
3024 }
3025
ce8abf5f
SP
3026 return PerlIO_open(name, mode);
3027}
3028
3029STATIC PerlIO *
7925835c 3030S_doopen_pm(pTHX_ const char *name, const char *mode)
b295d113 3031{
7925835c 3032#ifndef PERL_DISABLE_PMC
f54cb97a 3033 const STRLEN namelen = strlen(name);
b295d113
TH
3034 PerlIO *fp;
3035
7894fbab 3036 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
9d4ba2ae 3037 SV * const pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
349d4f2f 3038 const char * const pmc = SvPV_nolen_const(pmcsv);
a6c40364
GS
3039 Stat_t pmcstat;
3040 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
85e8f315 3041 fp = check_type_and_open(name, mode);
a6c40364
GS
3042 }
3043 else {
a91233bf 3044 fp = check_type_and_open(pmc, mode);
b295d113 3045 }
a6c40364
GS
3046 SvREFCNT_dec(pmcsv);
3047 }
3048 else {
85e8f315 3049 fp = check_type_and_open(name, mode);
b295d113 3050 }
b295d113 3051 return fp;
7925835c 3052#else
85e8f315 3053 return check_type_and_open(name, mode);
7925835c 3054#endif /* !PERL_DISABLE_PMC */
b295d113
TH
3055}
3056
a0d0e21e
LW
3057PP(pp_require)
3058{
27da23d5 3059 dVAR; dSP;
c09156bb 3060 register PERL_CONTEXT *cx;
a0d0e21e 3061 SV *sv;
5c144d81 3062 const char *name;
6132ea6c 3063 STRLEN len;
4492be7a
JM
3064 char * unixname;
3065 STRLEN unixlen;
62f5ad7a 3066#ifdef VMS
4492be7a 3067 int vms_unixname = 0;
62f5ad7a 3068#endif
c445ea15
AL
3069 const char *tryname = NULL;
3070 SV *namesv = NULL;
f54cb97a 3071 const I32 gimme = GIMME_V;
bbed91b5 3072 int filter_has_file = 0;
c445ea15 3073 PerlIO *tryrsfp = NULL;
34113e50 3074 SV *filter_cache = NULL;
c445ea15
AL
3075 SV *filter_state = NULL;
3076 SV *filter_sub = NULL;
3077 SV *hook_sv = NULL;
6ec9efec
JH
3078 SV *encoding;
3079 OP *op;
a0d0e21e
LW
3080
3081 sv = POPs;
d7aa5382 3082 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
fbc891ce
RB
3083 if ( SvVOK(sv) && ckWARN(WARN_PORTABLE) ) { /* require v5.6.1 */
3084 HV * hinthv = GvHV(PL_hintgv);
3085 SV ** ptr = NULL;
3086 if (hinthv) ptr = hv_fetchs(hinthv, "v_string", FALSE);
3087 if ( !(ptr && *ptr && SvIOK(*ptr) && SvIV(*ptr)) )
9014280d 3088 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
e3407aba 3089 "v-string in use/require non-portable");
fbc891ce 3090 }
d7aa5382
JP
3091 sv = new_version(sv);
3092 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3093 upg_version(PL_patchlevel, TRUE);
149c1637 3094 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3095 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3096 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3097 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3098 }
3099 else {
d1029faa
JP
3100 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3101 I32 first = 0;
3102 AV *lav;
3103 SV * const req = SvRV(sv);
3104 SV * const pv = *hv_fetchs((HV*)req, "original", FALSE);
3105
3106 /* get the left hand term */
3107 lav = (AV *)SvRV(*hv_fetchs((HV*)req, "version", FALSE));
3108
3109 first = SvIV(*av_fetch(lav,0,0));
3110 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
3111 || hv_exists((HV*)req, "qv", 2 ) /* qv style */
3112 || av_len(lav) > 1 /* FP with > 3 digits */
3113 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3114 ) {
3115 DIE(aTHX_ "Perl %"SVf" required--this is only "
3116 "%"SVf", stopped", SVfARG(vnormal(req)),
3117 SVfARG(vnormal(PL_patchlevel)));
3118 }
3119 else { /* probably 'use 5.10' or 'use 5.8' */
3120 SV * hintsv = newSV(0);
3121 I32 second = 0;
3122
3123 if (av_len(lav)>=1)
3124 second = SvIV(*av_fetch(lav,1,0));
3125
3126 second /= second >= 600 ? 100 : 10;
3127 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.%d",
3128 (int)first, (int)second,0);
3129 upg_version(hintsv, TRUE);
3130
3131 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3132 "--this is only %"SVf", stopped",
3133 SVfARG(vnormal(req)),
3134 SVfARG(vnormal(hintsv)),
3135 SVfARG(vnormal(PL_patchlevel)));
3136 }
3137 }
468aa647 3138 }
d7aa5382 3139
fbc891ce
RB
3140 /* We do this only with use, not require. */
3141 if (PL_compcv &&
3142 /* If we request a version >= 5.6.0, then v-string are OK
3143 so set $^H{v_string} to suppress the v-string warning */
3144 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.006), FALSE))) >= 0) {
3145 HV * hinthv = GvHV(PL_hintgv);
3146 if( hinthv ) {
fc92a12d
NC
3147 SV *hint = newSViv(1);
3148 (void)hv_stores(hinthv, "v_string", hint);
3149 /* This will call through to Perl_magic_sethint() which in turn
3150 sets PL_hints correctly. */
3151 SvSETMAGIC(hint);
fbc891ce
RB
3152 }
3153 /* If we request a version >= 5.9.5, load feature.pm with the
3154 * feature bundle that corresponds to the required version. */
3155 if (vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3156 SV *const importsv = vnormal(sv);
3157 *SvPVX_mutable(importsv) = ':';
3158 ENTER;
3159 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3160 LEAVE;
fbc891ce 3161 }
7dfde25d
RGS
3162 }
3163
3164 RETPUSHYES;
a0d0e21e 3165 }
5c144d81 3166 name = SvPV_const(sv, len);
6132ea6c 3167 if (!(name && len > 0 && *name))
cea2e8a9 3168 DIE(aTHX_ "Null filename used");
4633a7c4 3169 TAINT_PROPER("require");
4492be7a
JM
3170
3171
3172#ifdef VMS
3173 /* The key in the %ENV hash is in the syntax of file passed as the argument
3174 * usually this is in UNIX format, but sometimes in VMS format, which
3175 * can result in a module being pulled in more than once.
3176 * To prevent this, the key must be stored in UNIX format if the VMS
3177 * name can be translated to UNIX.
3178 */
3179 if ((unixname = tounixspec(name, NULL)) != NULL) {
3180 unixlen = strlen(unixname);
3181 vms_unixname = 1;
3182 }
3183 else
3184#endif
3185 {
3186 /* if not VMS or VMS name can not be translated to UNIX, pass it
3187 * through.
3188 */
3189 unixname = (char *) name;
3190 unixlen = len;
3191 }
44f8325f 3192 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM
3193 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3194 unixname, unixlen, 0);
44f8325f
AL
3195 if ( svp ) {
3196 if (*svp != &PL_sv_undef)
3197 RETPUSHYES;
3198 else
087b5369
RD
3199 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3200 "Compilation failed in require", unixname);
44f8325f 3201 }
4d8b06f1 3202 }
a0d0e21e
LW
3203
3204 /* prepare to compile file */
3205
be4b629d 3206 if (path_is_absolute(name)) {
46fc3d4c 3207 tryname = name;
7925835c 3208 tryrsfp = doopen_pm(name,PERL_SCRIPT_MODE);
bf4acbe4 3209 }
67627c52
JH
3210#ifdef MACOS_TRADITIONAL
3211 if (!tryrsfp) {
3212 char newname[256];
3213
3214 MacPerl_CanonDir(name, newname, 1);
3215 if (path_is_absolute(newname)) {
3216 tryname = newname;
7925835c 3217 tryrsfp = doopen_pm(newname,PERL_SCRIPT_MODE);
67627c52
JH
3218 }
3219 }
3220#endif
be4b629d 3221 if (!tryrsfp) {
44f8325f 3222 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3223 I32 i;
748a9306 3224#ifdef VMS
4492be7a 3225 if (vms_unixname)
46fc3d4c
PP
3226#endif
3227 {
561b68a9 3228 namesv = newSV(0);
46fc3d4c 3229 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3230 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3231
c38a6530
RD
3232 if (SvTIED_mg((SV*)ar, PERL_MAGIC_tied))
3233 mg_get(dirsv);
bbed91b5
KF
3234 if (SvROK(dirsv)) {
3235 int count;
a3b58a99 3236 SV **svp;
bbed91b5
KF
3237 SV *loader = dirsv;
3238
e14e2dc8
NC
3239 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3240 && !sv_isobject(loader))
3241 {
bbed91b5
KF
3242 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3243 }
3244
b900a521 3245 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3246 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3247 tryname = SvPVX_const(namesv);
c445ea15 3248 tryrsfp = NULL;
bbed91b5
KF
3249
3250 ENTER;
3251 SAVETMPS;
3252 EXTEND(SP, 2);
3253
3254 PUSHMARK(SP);
3255 PUSHs(dirsv);
3256 PUSHs(sv);
3257 PUTBACK;
e982885c
NC
3258 if (sv_isobject(loader))
3259 count = call_method("INC", G_ARRAY);
3260 else
3261 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3262 SPAGAIN;
3263
a3b58a99
RGS
3264 /* Adjust file name if the hook has set an %INC entry */
3265 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3266 if (svp)
3267 tryname = SvPVX_const(*svp);
3268
bbed91b5
KF
3269 if (count > 0) {
3270 int i = 0;
3271 SV *arg;
3272
3273 SP -= count - 1;
3274 arg = SP[i++];
3275
34113e50
NC
3276 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3277 && !isGV_with_GP(SvRV(arg))) {
3278 filter_cache = SvRV(arg);
74c765eb 3279 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3280
3281 if (i < count) {
3282 arg = SP[i++];
3283 }
3284 }
3285
bbed91b5
KF
3286 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3287 arg = SvRV(arg);
3288 }
3289
3290 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3291 IO * const io = GvIO((GV *)arg);
bbed91b5
KF
3292
3293 ++filter_has_file;
3294
3295 if (io) {
3296 tryrsfp = IoIFP(io);
0f7de14d
NC
3297 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3298 PerlIO_close(IoOFP(io));
bbed91b5 3299 }
0f7de14d
NC
3300 IoIFP(io) = NULL;
3301 IoOFP(io) = NULL;
bbed91b5
KF
3302 }
3303
3304 if (i < count) {
3305 arg = SP[i++];
3306 }
3307 }
3308
3309 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3310 filter_sub = arg;
74c765eb 3311 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF
3312
3313 if (i < count) {
3314 filter_state = SP[i];
b37c2d43 3315 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3316 }
34113e50 3317 }
bbed91b5 3318
34113e50
NC
3319 if (!tryrsfp && (filter_cache || filter_sub)) {
3320 tryrsfp = PerlIO_open(BIT_BUCKET,
3321 PERL_SCRIPT_MODE);
bbed91b5 3322 }
1d06aecd 3323 SP--;
bbed91b5
KF
3324 }
3325
3326 PUTBACK;
3327 FREETMPS;
3328 LEAVE;
3329
3330 if (tryrsfp) {
89ccab8c 3331 hook_sv = dirsv;
bbed91b5
KF
3332 break;
3333 }
3334
3335 filter_has_file = 0;
34113e50
NC
3336 if (filter_cache) {
3337 SvREFCNT_dec(filter_cache);
3338 filter_cache = NULL;
3339 }
bbed91b5
KF
3340 if (filter_state) {
3341 SvREFCNT_dec(filter_state);
c445ea15 3342 filter_state = NULL;
bbed91b5
KF
3343 }
3344 if (filter_sub) {
3345 SvREFCNT_dec(filter_sub);
c445ea15 3346 filter_sub = NULL;
bbed91b5
KF
3347 }
3348 }
3349 else {
be4b629d
CN
3350 if (!path_is_absolute(name)
3351#ifdef MACOS_TRADITIONAL
3352 /* We consider paths of the form :a:b ambiguous and interpret them first
3353 as global then as local
3354 */
3355 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3356#endif
3357 ) {
089d5d59 3358 const char *dir = SvOK(dirsv) ? SvPV_nolen_const(dirsv) : "";
bf4acbe4 3359#ifdef MACOS_TRADITIONAL
67627c52
JH
3360 char buf1[256];
3361 char buf2[256];
3362
3363 MacPerl_CanonDir(name, buf2, 1);
3364 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3365#else
27da23d5 3366# ifdef VMS
bbed91b5 3367 char *unixdir;
c445ea15 3368 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF
3369 continue;
3370 sv_setpv(namesv, unixdir);
3371 sv_catpv(namesv, unixname);
27da23d5 3372# else
a0fd4948 3373# ifdef __SYMBIAN32__
27da23d5
JH
3374 if (PL_origfilename[0] &&
3375 PL_origfilename[1] == ':' &&
3376 !(dir[0] && dir[1] == ':'))
3377 Perl_sv_setpvf(aTHX_ namesv,
3378 "%c:%s\\%s",
3379 PL_origfilename[0],
3380 dir, name);
3381 else
3382 Perl_sv_setpvf(aTHX_ namesv,
3383 "%s\\%s",
3384 dir, name);
3385# else
bbed91b5 3386 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
27da23d5
JH
3387# endif
3388# endif
bf4acbe4 3389#endif
bbed91b5 3390 TAINT_PROPER("require");
349d4f2f 3391 tryname = SvPVX_const(namesv);
7925835c 3392 tryrsfp = doopen_pm(tryname, PERL_SCRIPT_MODE);
bbed91b5
KF
3393 if (tryrsfp) {
3394 if (tryname[0] == '.' && tryname[1] == '/')
3395 tryname += 2;
3396 break;
3397 }
ff806af2
DM
3398 else if (errno == EMFILE)
3399 /* no point in trying other paths if out of handles */
3400 break;
be4b629d 3401 }
46fc3d4c 3402 }
a0d0e21e
LW
3403 }
3404 }
3405 }
f4dd75d9 3406 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3407 CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
46fc3d4c 3408 SvREFCNT_dec(namesv);
a0d0e21e 3409 if (!tryrsfp) {
533c011a 3410 if (PL_op->op_type == OP_REQUIRE) {
5c144d81 3411 const char *msgstr = name;
e31de809 3412 if(errno == EMFILE) {
b9b739dc
NC
3413 SV * const msg
3414 = sv_2mortal(Perl_newSVpvf(aTHX_ "%s: %s", msgstr,
3415 Strerror(errno)));
349d4f2f 3416 msgstr = SvPV_nolen_const(msg);
e31de809
SP
3417 } else {
3418 if (namesv) { /* did we lookup @INC? */
44f8325f 3419 AV * const ar = GvAVn(PL_incgv);
e31de809 3420 I32 i;
b8f04b1b
NC
3421