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[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW
1/* pp_ctl.c
2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 */
19
166f8a29
DM
20/* This file contains control-oriented pp ("push/pop") functions that
21 * execute the opcodes that make up a perl program. A typical pp function
22 * expects to find its arguments on the stack, and usually pushes its
23 * results onto the stack, hence the 'pp' terminology. Each OP structure
24 * contains a pointer to the relevant pp_foo() function.
25 *
26 * Control-oriented means things like pp_enteriter() and pp_next(), which
27 * alter the flow of control of the program.
28 */
29
30
a0d0e21e 31#include "EXTERN.h"
864dbfa3 32#define PERL_IN_PP_CTL_C
a0d0e21e
LW
33#include "perl.h"
34
35#ifndef WORD_ALIGN
dea28490 36#define WORD_ALIGN sizeof(U32)
a0d0e21e
LW
37#endif
38
54310121 39#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 40
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;
84679df5 80 REGEXP *re = NULL;
bfed75c6 81
4b5a0d1c 82 /* prevent recompiling under /o and ithreads. */
3db8f154 83#if defined(USE_ITHREADS)
131b3ad0
DM
84 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
85 if (PL_op->op_flags & OPf_STACKED) {
86 dMARK;
87 SP = MARK;
88 }
89 else
90 (void)POPs;
91 RETURN;
92 }
513629ba 93#endif
131b3ad0
DM
94 if (PL_op->op_flags & OPf_STACKED) {
95 /* multiple args; concatentate them */
96 dMARK; dORIGMARK;
97 tmpstr = PAD_SV(ARGTARG);
98 sv_setpvn(tmpstr, "", 0);
99 while (++MARK <= SP) {
100 if (PL_amagic_generation) {
101 SV *sv;
102 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
103 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
104 {
105 sv_setsv(tmpstr, sv);
106 continue;
107 }
108 }
109 sv_catsv(tmpstr, *MARK);
110 }
111 SvSETMAGIC(tmpstr);
112 SP = ORIGMARK;
113 }
114 else
115 tmpstr = POPs;
513629ba 116
b3eb6a9b 117 if (SvROK(tmpstr)) {
d8f6592e 118 SV * const sv = SvRV(tmpstr);
5c35adbb 119 if (SvTYPE(sv) == SVt_REGEXP)
d2f13c59 120 re = (REGEXP*) sv;
c277df42 121 }
5c35adbb
NC
122 if (re) {
123 re = reg_temp_copy(re);
aaa362c4 124 ReREFCNT_dec(PM_GETRE(pm));
28d8d7f4 125 PM_SETRE(pm, re);
c277df42
IZ
126 }
127 else {
e62f0680 128 STRLEN len;
3ab4a224 129 const char *t = SvOK(tmpstr) ? SvPV_const(tmpstr, len) : "";
c737faaf 130 re = PM_GETRE(pm);
14a49a24 131 assert (re != (REGEXP*) &PL_sv_undef);
c277df42 132
20408e3c 133 /* Check against the last compiled regexp. */
a11c8683 134 if (!re || !RX_PRECOMP(re) || RX_PRELEN(re) != len ||
220fc49f 135 memNE(RX_PRECOMP(re), t, len))
85aff577 136 {
07bc277f 137 const regexp_engine *eng = re ? RX_ENGINE(re) : NULL;
c737faaf 138 U32 pm_flags = pm->op_pmflags & PMf_COMPILETIME;
d8f6592e
AL
139 if (re) {
140 ReREFCNT_dec(re);
14a49a24
NC
141#ifdef USE_ITHREADS
142 PM_SETRE(pm, (REGEXP*) &PL_sv_undef);
143#else
4608196e 144 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
14a49a24 145#endif
1e2e3d02
YO
146 } else if (PL_curcop->cop_hints_hash) {
147 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
148 "regcomp", 7, 0, 0);
149 if (ptr && SvIOK(ptr) && SvIV(ptr))
150 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 151 }
664e119d 152
533c011a 153 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 154 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 155
b9ad30b4
NC
156 if (DO_UTF8(tmpstr)) {
157 assert (SvUTF8(tmpstr));
158 } else if (SvUTF8(tmpstr)) {
159 /* Not doing UTF-8, despite what the SV says. Is this only if
160 we're trapped in use 'bytes'? */
161 /* Make a copy of the octet sequence, but without the flag on,
162 as the compiler now honours the SvUTF8 flag on tmpstr. */
163 STRLEN len;
164 const char *const p = SvPV(tmpstr, len);
165 tmpstr = newSVpvn_flags(p, len, SVs_TEMP);
166 }
c737faaf 167
3ab4a224
AB
168 if (eng)
169 PM_SETRE(pm, CALLREGCOMP_ENG(eng, tmpstr, pm_flags));
170 else
171 PM_SETRE(pm, CALLREGCOMP(tmpstr, pm_flags));
c737faaf 172
f86aaa29 173 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 174 inside tie/overload accessors. */
c277df42 175 }
4633a7c4 176 }
c737faaf
YO
177
178 re = PM_GETRE(pm);
a0d0e21e 179
72311751 180#ifndef INCOMPLETE_TAINTS
3280af22
NIS
181 if (PL_tainting) {
182 if (PL_tainted)
07bc277f 183 RX_EXTFLAGS(re) |= RXf_TAINTED;
72311751 184 else
07bc277f 185 RX_EXTFLAGS(re) &= ~RXf_TAINTED;
72311751
GS
186 }
187#endif
188
220fc49f 189 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
3280af22 190 pm = PL_curpm;
a0d0e21e 191
c737faaf
YO
192
193#if !defined(USE_ITHREADS)
194 /* can't change the optree at runtime either */
195 /* PMf_KEEP is handled differently under threads to avoid these problems */
a0d0e21e 196 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 197 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 198 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 199 }
c737faaf 200#endif
a0d0e21e
LW
201 RETURN;
202}
203
204PP(pp_substcont)
205{
97aff369 206 dVAR;
39644a26 207 dSP;
c09156bb 208 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
209 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
210 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
211 register char *s = cx->sb_s;
212 register char *m = cx->sb_m;
213 char *orig = cx->sb_orig;
901017d6 214 register REGEXP * const rx = cx->sb_rx;
c445ea15 215 SV *nsv = NULL;
988e6e7e
AE
216 REGEXP *old = PM_GETRE(pm);
217 if(old != rx) {
bfed75c6 218 if(old)
988e6e7e 219 ReREFCNT_dec(old);
d6106309 220 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
221 }
222
d9f97599 223 rxres_restore(&cx->sb_rxres, rx);
01b35787 224 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 225
a0d0e21e 226 if (cx->sb_iters++) {
a3b680e6 227 const I32 saviters = cx->sb_iters;
a0d0e21e 228 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 229 DIE(aTHX_ "Substitution loop");
a0d0e21e 230
48c036b1
GS
231 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
232 cx->sb_rxtainted |= 2;
a0d0e21e 233 sv_catsv(dstr, POPs);
8ff629d9 234 FREETMPS; /* Prevent excess tmp stack */
a0d0e21e
LW
235
236 /* Are we done */
f9f4320a 237 if (cx->sb_once || !CALLREGEXEC(rx, s, cx->sb_strend, orig,
9661b544 238 s == m, cx->sb_targ, NULL,
22e551b9 239 ((cx->sb_rflags & REXEC_COPY_STR)
cf93c79d
IZ
240 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
241 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 242 {
823a54a3 243 SV * const targ = cx->sb_targ;
748a9306 244
078c425b
JH
245 assert(cx->sb_strend >= s);
246 if(cx->sb_strend > s) {
247 if (DO_UTF8(dstr) && !SvUTF8(targ))
248 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
249 else
250 sv_catpvn(dstr, s, cx->sb_strend - s);
251 }
48c036b1 252 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 253
f8c7b90f 254#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
255 if (SvIsCOW(targ)) {
256 sv_force_normal_flags(targ, SV_COW_DROP_PV);
257 } else
258#endif
259 {
8bd4d4c5 260 SvPV_free(targ);
ed252734 261 }
f880fe2f 262 SvPV_set(targ, SvPVX(dstr));
748a9306
LW
263 SvCUR_set(targ, SvCUR(dstr));
264 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH
265 if (DO_UTF8(dstr))
266 SvUTF8_on(targ);
6136c704 267 SvPV_set(dstr, NULL);
48c036b1
GS
268
269 TAINT_IF(cx->sb_rxtainted & 1);
6e449a3a 270 mPUSHi(saviters - 1);
48c036b1 271
ffc61ed2 272 (void)SvPOK_only_UTF8(targ);
48c036b1 273 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 274 SvSETMAGIC(targ);
9212bbba 275 SvTAINT(targ);
5cd24f17 276
4633a7c4 277 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
278 POPSUBST(cx);
279 RETURNOP(pm->op_next);
280 }
8e5e9ebe 281 cx->sb_iters = saviters;
a0d0e21e 282 }
07bc277f 283 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW
284 m = s;
285 s = orig;
07bc277f 286 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW
287 s = orig + (m - s);
288 cx->sb_strend = s + (cx->sb_strend - m);
289 }
07bc277f 290 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 291 if (m > s) {
bfed75c6 292 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
293 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
294 else
295 sv_catpvn(dstr, s, m-s);
296 }
07bc277f 297 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 298 { /* Update the pos() information. */
44f8325f 299 SV * const sv = cx->sb_targ;
084916e3
JH
300 MAGIC *mg;
301 I32 i;
7a7f3e45 302 SvUPGRADE(sv, SVt_PVMG);
14befaf4 303 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 304#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 305 if (SvIsCOW(sv))
d83f0a82
NC
306 sv_force_normal_flags(sv, 0);
307#endif
308 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
309 NULL, 0);
084916e3
JH
310 }
311 i = m - orig;
312 if (DO_UTF8(sv))
313 sv_pos_b2u(sv, &i);
314 mg->mg_len = i;
315 }
988e6e7e 316 if (old != rx)
d6106309 317 (void)ReREFCNT_inc(rx);
d9f97599
GS
318 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
319 rxres_save(&cx->sb_rxres, rx);
29f2e912 320 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW
321}
322
c90c0ff4 323void
864dbfa3 324Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
325{
326 UV *p = (UV*)*rsp;
327 U32 i;
96a5add6 328 PERL_UNUSED_CONTEXT;
c90c0ff4 329
07bc277f 330 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 331#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 332 i = 7 + RX_NPARENS(rx) * 2;
ed252734 333#else
07bc277f 334 i = 6 + RX_NPARENS(rx) * 2;
ed252734 335#endif
c90c0ff4 336 if (!p)
a02a5408 337 Newx(p, i, UV);
c90c0ff4
PP
338 else
339 Renew(p, i, UV);
340 *rsp = (void*)p;
341 }
342
07bc277f 343 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 344 RX_MATCH_COPIED_off(rx);
c90c0ff4 345
f8c7b90f 346#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
347 *p++ = PTR2UV(RX_SAVED_COPY(rx));
348 RX_SAVED_COPY(rx) = NULL;
ed252734
NC
349#endif
350
07bc277f 351 *p++ = RX_NPARENS(rx);
c90c0ff4 352
07bc277f
NC
353 *p++ = PTR2UV(RX_SUBBEG(rx));
354 *p++ = (UV)RX_SUBLEN(rx);
355 for (i = 0; i <= RX_NPARENS(rx); ++i) {
356 *p++ = (UV)RX_OFFS(rx)[i].start;
357 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4
PP
358 }
359}
360
361void
864dbfa3 362Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
363{
364 UV *p = (UV*)*rsp;
365 U32 i;
96a5add6 366 PERL_UNUSED_CONTEXT;
c90c0ff4 367
ed252734 368 RX_MATCH_COPY_FREE(rx);
cf93c79d 369 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
370 *p++ = 0;
371
f8c7b90f 372#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC
373 if (RX_SAVED_COPY(rx))
374 SvREFCNT_dec (RX_SAVED_COPY(rx));
375 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC
376 *p++ = 0;
377#endif
378
07bc277f 379 RX_NPARENS(rx) = *p++;
c90c0ff4 380
07bc277f
NC
381 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
382 RX_SUBLEN(rx) = (I32)(*p++);
383 for (i = 0; i <= RX_NPARENS(rx); ++i) {
384 RX_OFFS(rx)[i].start = (I32)(*p++);
385 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4
PP
386 }
387}
388
389void
864dbfa3 390Perl_rxres_free(pTHX_ void **rsp)
c90c0ff4 391{
44f8325f 392 UV * const p = (UV*)*rsp;
96a5add6 393 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
394
395 if (p) {
94010e71
NC
396#ifdef PERL_POISON
397 void *tmp = INT2PTR(char*,*p);
398 Safefree(tmp);
399 if (*p)
7e337ee0 400 PoisonFree(*p, 1, sizeof(*p));
94010e71 401#else
56431972 402 Safefree(INT2PTR(char*,*p));
94010e71 403#endif
f8c7b90f 404#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
405 if (p[1]) {
406 SvREFCNT_dec (INT2PTR(SV*,p[1]));
407 }
408#endif
c90c0ff4 409 Safefree(p);
4608196e 410 *rsp = NULL;
c90c0ff4
PP
411 }
412}
413
a0d0e21e
LW
414PP(pp_formline)
415{
97aff369 416 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 417 register SV * const tmpForm = *++MARK;
dea28490 418 register U32 *fpc;
a0d0e21e 419 register char *t;
245d4a47 420 const char *f;
a0d0e21e 421 register I32 arg;
c445ea15
AL
422 register SV *sv = NULL;
423 const char *item = NULL;
9c5ffd7c
JH
424 I32 itemsize = 0;
425 I32 fieldsize = 0;
a0d0e21e 426 I32 lines = 0;
c445ea15
AL
427 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
428 const char *chophere = NULL;
429 char *linemark = NULL;
65202027 430 NV value;
9c5ffd7c 431 bool gotsome = FALSE;
a0d0e21e 432 STRLEN len;
823a54a3 433 const STRLEN fudge = SvPOK(tmpForm)
24c89738 434 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
435 bool item_is_utf8 = FALSE;
436 bool targ_is_utf8 = FALSE;
c445ea15 437 SV * nsv = NULL;
cbbf8932 438 OP * parseres = NULL;
bfed75c6 439 const char *fmt;
a1b95068 440 bool oneline;
a0d0e21e 441
76e3520e 442 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
443 if (SvREADONLY(tmpForm)) {
444 SvREADONLY_off(tmpForm);
a1b95068 445 parseres = doparseform(tmpForm);
445b3f51
GS
446 SvREADONLY_on(tmpForm);
447 }
448 else
a1b95068
LW
449 parseres = doparseform(tmpForm);
450 if (parseres)
451 return parseres;
a0d0e21e 452 }
3280af22 453 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
454 if (DO_UTF8(PL_formtarget))
455 targ_is_utf8 = TRUE;
a0ed51b3 456 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 457 t += len;
245d4a47 458 f = SvPV_const(tmpForm, len);
a0d0e21e 459 /* need to jump to the next word */
245d4a47 460 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
461
462 for (;;) {
463 DEBUG_f( {
bfed75c6 464 const char *name = "???";
a0d0e21e
LW
465 arg = -1;
466 switch (*fpc) {
467 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
468 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
469 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
470 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
471 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
472
473 case FF_CHECKNL: name = "CHECKNL"; break;
474 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
475 case FF_SPACE: name = "SPACE"; break;
476 case FF_HALFSPACE: name = "HALFSPACE"; break;
477 case FF_ITEM: name = "ITEM"; break;
478 case FF_CHOP: name = "CHOP"; break;
479 case FF_LINEGLOB: name = "LINEGLOB"; break;
480 case FF_NEWLINE: name = "NEWLINE"; break;
481 case FF_MORE: name = "MORE"; break;
482 case FF_LINEMARK: name = "LINEMARK"; break;
483 case FF_END: name = "END"; break;
bfed75c6 484 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 485 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
486 }
487 if (arg >= 0)
bf49b057 488 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 489 else
bf49b057 490 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 491 } );
a0d0e21e
LW
492 switch (*fpc++) {
493 case FF_LINEMARK:
494 linemark = t;
a0d0e21e
LW
495 lines++;
496 gotsome = FALSE;
497 break;
498
499 case FF_LITERAL:
500 arg = *fpc++;
1bd51a4c 501 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 502 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
503 *t = '\0';
504 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
505 t = SvEND(PL_formtarget);
1bd51a4c
IH
506 break;
507 }
508 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 509 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
510 *t = '\0';
511 sv_utf8_upgrade(PL_formtarget);
512 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
513 t = SvEND(PL_formtarget);
514 targ_is_utf8 = TRUE;
515 }
a0d0e21e
LW
516 while (arg--)
517 *t++ = *f++;
518 break;
519
520 case FF_SKIP:
521 f += *fpc++;
522 break;
523
524 case FF_FETCH:
525 arg = *fpc++;
526 f += arg;
527 fieldsize = arg;
528
529 if (MARK < SP)
530 sv = *++MARK;
531 else {
3280af22 532 sv = &PL_sv_no;
599cee73 533 if (ckWARN(WARN_SYNTAX))
9014280d 534 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
535 }
536 break;
537
538 case FF_CHECKNL:
5a34cab7
NC
539 {
540 const char *send;
541 const char *s = item = SvPV_const(sv, len);
542 itemsize = len;
543 if (DO_UTF8(sv)) {
544 itemsize = sv_len_utf8(sv);
545 if (itemsize != (I32)len) {
546 I32 itembytes;
547 if (itemsize > fieldsize) {
548 itemsize = fieldsize;
549 itembytes = itemsize;
550 sv_pos_u2b(sv, &itembytes, 0);
551 }
552 else
553 itembytes = len;
554 send = chophere = s + itembytes;
555 while (s < send) {
556 if (*s & ~31)
557 gotsome = TRUE;
558 else if (*s == '\n')
559 break;
560 s++;
561 }
562 item_is_utf8 = TRUE;
563 itemsize = s - item;
564 sv_pos_b2u(sv, &itemsize);
565 break;
a0ed51b3 566 }
a0ed51b3 567 }
5a34cab7
NC
568 item_is_utf8 = FALSE;
569 if (itemsize > fieldsize)
570 itemsize = fieldsize;
571 send = chophere = s + itemsize;
572 while (s < send) {
573 if (*s & ~31)
574 gotsome = TRUE;
575 else if (*s == '\n')
576 break;
577 s++;
578 }
579 itemsize = s - item;
580 break;
a0ed51b3 581 }
a0d0e21e
LW
582
583 case FF_CHECKCHOP:
5a34cab7
NC
584 {
585 const char *s = item = SvPV_const(sv, len);
586 itemsize = len;
587 if (DO_UTF8(sv)) {
588 itemsize = sv_len_utf8(sv);
589 if (itemsize != (I32)len) {
590 I32 itembytes;
591 if (itemsize <= fieldsize) {
592 const char *send = chophere = s + itemsize;
593 while (s < send) {
594 if (*s == '\r') {
595 itemsize = s - item;
a0ed51b3 596 chophere = s;
a0ed51b3 597 break;
5a34cab7
NC
598 }
599 if (*s++ & ~31)
a0ed51b3 600 gotsome = TRUE;
a0ed51b3 601 }
a0ed51b3 602 }
5a34cab7
NC
603 else {
604 const char *send;
605 itemsize = fieldsize;
606 itembytes = itemsize;
607 sv_pos_u2b(sv, &itembytes, 0);
608 send = chophere = s + itembytes;
609 while (s < send || (s == send && isSPACE(*s))) {
610 if (isSPACE(*s)) {
611 if (chopspace)
612 chophere = s;
613 if (*s == '\r')
614 break;
615 }
616 else {
617 if (*s & ~31)
618 gotsome = TRUE;
619 if (strchr(PL_chopset, *s))
620 chophere = s + 1;
621 }
622 s++;
623 }
624 itemsize = chophere - item;
625 sv_pos_b2u(sv, &itemsize);
626 }
627 item_is_utf8 = TRUE;
a0d0e21e
LW
628 break;
629 }
a0d0e21e 630 }
5a34cab7
NC
631 item_is_utf8 = FALSE;
632 if (itemsize <= fieldsize) {
633 const char *const send = chophere = s + itemsize;
634 while (s < send) {
635 if (*s == '\r') {
636 itemsize = s - item;
a0d0e21e 637 chophere = s;
a0d0e21e 638 break;
5a34cab7
NC
639 }
640 if (*s++ & ~31)
a0d0e21e 641 gotsome = TRUE;
a0d0e21e 642 }
a0d0e21e 643 }
5a34cab7
NC
644 else {
645 const char *send;
646 itemsize = fieldsize;
647 send = chophere = s + itemsize;
648 while (s < send || (s == send && isSPACE(*s))) {
649 if (isSPACE(*s)) {
650 if (chopspace)
651 chophere = s;
652 if (*s == '\r')
653 break;
654 }
655 else {
656 if (*s & ~31)
657 gotsome = TRUE;
658 if (strchr(PL_chopset, *s))
659 chophere = s + 1;
660 }
661 s++;
662 }
663 itemsize = chophere - item;
664 }
665 break;
a0d0e21e 666 }
a0d0e21e
LW
667
668 case FF_SPACE:
669 arg = fieldsize - itemsize;
670 if (arg) {
671 fieldsize -= arg;
672 while (arg-- > 0)
673 *t++ = ' ';
674 }
675 break;
676
677 case FF_HALFSPACE:
678 arg = fieldsize - itemsize;
679 if (arg) {
680 arg /= 2;
681 fieldsize -= arg;
682 while (arg-- > 0)
683 *t++ = ' ';
684 }
685 break;
686
687 case FF_ITEM:
5a34cab7
NC
688 {
689 const char *s = item;
690 arg = itemsize;
691 if (item_is_utf8) {
692 if (!targ_is_utf8) {
693 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
694 *t = '\0';
695 sv_utf8_upgrade(PL_formtarget);
696 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
697 t = SvEND(PL_formtarget);
698 targ_is_utf8 = TRUE;
a0ed51b3 699 }
5a34cab7
NC
700 while (arg--) {
701 if (UTF8_IS_CONTINUED(*s)) {
702 STRLEN skip = UTF8SKIP(s);
703 switch (skip) {
704 default:
705 Move(s,t,skip,char);
706 s += skip;
707 t += skip;
708 break;
709 case 7: *t++ = *s++;
710 case 6: *t++ = *s++;
711 case 5: *t++ = *s++;
712 case 4: *t++ = *s++;
713 case 3: *t++ = *s++;
714 case 2: *t++ = *s++;
715 case 1: *t++ = *s++;
716 }
717 }
718 else {
719 if ( !((*t++ = *s++) & ~31) )
720 t[-1] = ' ';
721 }
a0ed51b3 722 }
5a34cab7 723 break;
a0ed51b3 724 }
5a34cab7
NC
725 if (targ_is_utf8 && !item_is_utf8) {
726 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
727 *t = '\0';
728 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
729 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 730#ifdef EBCDIC
901017d6 731 const int ch = *t;
5a34cab7 732 if (iscntrl(ch))
78da4d13 733#else
5a34cab7 734 if (!(*t & ~31))
78da4d13 735#endif
5a34cab7
NC
736 *t = ' ';
737 }
738 break;
78da4d13 739 }
5a34cab7 740 while (arg--) {
9d116dd7 741#ifdef EBCDIC
901017d6 742 const int ch = *t++ = *s++;
5a34cab7 743 if (iscntrl(ch))
a0d0e21e 744#else
5a34cab7 745 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 746#endif
5a34cab7
NC
747 t[-1] = ' ';
748 }
749 break;
a0d0e21e 750 }
a0d0e21e
LW
751
752 case FF_CHOP:
5a34cab7
NC
753 {
754 const char *s = chophere;
755 if (chopspace) {
af68e756 756 while (isSPACE(*s))
5a34cab7
NC
757 s++;
758 }
759 sv_chop(sv,s);
760 SvSETMAGIC(sv);
761 break;
a0d0e21e 762 }
a0d0e21e 763
a1b95068
LW
764 case FF_LINESNGL:
765 chopspace = 0;
766 oneline = TRUE;
767 goto ff_line;
a0d0e21e 768 case FF_LINEGLOB:
a1b95068
LW
769 oneline = FALSE;
770 ff_line:
5a34cab7
NC
771 {
772 const char *s = item = SvPV_const(sv, len);
773 itemsize = len;
774 if ((item_is_utf8 = DO_UTF8(sv)))
775 itemsize = sv_len_utf8(sv);
776 if (itemsize) {
777 bool chopped = FALSE;
778 const char *const send = s + len;
779 gotsome = TRUE;
780 chophere = s + itemsize;
781 while (s < send) {
782 if (*s++ == '\n') {
783 if (oneline) {
784 chopped = TRUE;
785 chophere = s;
786 break;
787 } else {
788 if (s == send) {
789 itemsize--;
790 chopped = TRUE;
791 } else
792 lines++;
793 }
1bd51a4c 794 }
a0d0e21e 795 }
5a34cab7
NC
796 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
797 if (targ_is_utf8)
798 SvUTF8_on(PL_formtarget);
799 if (oneline) {
800 SvCUR_set(sv, chophere - item);
801 sv_catsv(PL_formtarget, sv);
802 SvCUR_set(sv, itemsize);
803 } else
804 sv_catsv(PL_formtarget, sv);
805 if (chopped)
806 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) - 1);
807 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
808 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
809 if (item_is_utf8)
810 targ_is_utf8 = TRUE;
a0d0e21e 811 }
5a34cab7 812 break;
a0d0e21e 813 }
a0d0e21e 814
a1b95068
LW
815 case FF_0DECIMAL:
816 arg = *fpc++;
817#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
818 fmt = (const char *)
819 ((arg & 256) ?
820 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 821#else
10edeb5d
JH
822 fmt = (const char *)
823 ((arg & 256) ?
824 "%#0*.*f" : "%0*.*f");
a1b95068
LW
825#endif
826 goto ff_dec;
a0d0e21e 827 case FF_DECIMAL:
a0d0e21e 828 arg = *fpc++;
65202027 829#if defined(USE_LONG_DOUBLE)
10edeb5d
JH
830 fmt = (const char *)
831 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 832#else
10edeb5d
JH
833 fmt = (const char *)
834 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 835#endif
a1b95068 836 ff_dec:
784707d5
JP
837 /* If the field is marked with ^ and the value is undefined,
838 blank it out. */
784707d5
JP
839 if ((arg & 512) && !SvOK(sv)) {
840 arg = fieldsize;
841 while (arg--)
842 *t++ = ' ';
843 break;
844 }
845 gotsome = TRUE;
846 value = SvNV(sv);
a1b95068 847 /* overflow evidence */
bfed75c6 848 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
849 arg = fieldsize;
850 while (arg--)
851 *t++ = '#';
852 break;
853 }
784707d5
JP
854 /* Formats aren't yet marked for locales, so assume "yes". */
855 {
856 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 857 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
858 RESTORE_NUMERIC_STANDARD();
859 }
860 t += fieldsize;
861 break;
a1b95068 862
a0d0e21e
LW
863 case FF_NEWLINE:
864 f++;
865 while (t-- > linemark && *t == ' ') ;
866 t++;
867 *t++ = '\n';
868 break;
869
870 case FF_BLANK:
871 arg = *fpc++;
872 if (gotsome) {
873 if (arg) { /* repeat until fields exhausted? */
874 *t = '\0';
b15aece3 875 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 876 lines += FmLINES(PL_formtarget);
a0d0e21e
LW
877 if (lines == 200) {
878 arg = t - linemark;
879 if (strnEQ(linemark, linemark - arg, arg))
cea2e8a9 880 DIE(aTHX_ "Runaway format");
a0d0e21e 881 }
1bd51a4c
IH
882 if (targ_is_utf8)
883 SvUTF8_on(PL_formtarget);
3280af22 884 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
885 SP = ORIGMARK;
886 RETURNOP(cLISTOP->op_first);
887 }
888 }
889 else {
890 t = linemark;
891 lines--;
892 }
893 break;
894
895 case FF_MORE:
5a34cab7
NC
896 {
897 const char *s = chophere;
898 const char *send = item + len;
899 if (chopspace) {
af68e756 900 while (isSPACE(*s) && (s < send))
5a34cab7 901 s++;
a0d0e21e 902 }
5a34cab7
NC
903 if (s < send) {
904 char *s1;
905 arg = fieldsize - itemsize;
906 if (arg) {
907 fieldsize -= arg;
908 while (arg-- > 0)
909 *t++ = ' ';
910 }
911 s1 = t - 3;
912 if (strnEQ(s1," ",3)) {
913 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
914 s1--;
915 }
916 *s1++ = '.';
917 *s1++ = '.';
918 *s1++ = '.';
a0d0e21e 919 }
5a34cab7 920 break;
a0d0e21e 921 }
a0d0e21e
LW
922 case FF_END:
923 *t = '\0';
b15aece3 924 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
925 if (targ_is_utf8)
926 SvUTF8_on(PL_formtarget);
3280af22 927 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
928 SP = ORIGMARK;
929 RETPUSHYES;
930 }
931 }
932}
933
934PP(pp_grepstart)
935{
27da23d5 936 dVAR; dSP;
a0d0e21e
LW
937 SV *src;
938
3280af22 939 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 940 (void)POPMARK;
54310121 941 if (GIMME_V == G_SCALAR)
6e449a3a 942 mXPUSHi(0);
533c011a 943 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 944 }
3280af22 945 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
946 pp_pushmark(); /* push dst */
947 pp_pushmark(); /* push src */
a0d0e21e
LW
948 ENTER; /* enter outer scope */
949
950 SAVETMPS;
59f00321
RGS
951 if (PL_op->op_private & OPpGREP_LEX)
952 SAVESPTR(PAD_SVl(PL_op->op_targ));
953 else
954 SAVE_DEFSV;
a0d0e21e 955 ENTER; /* enter inner scope */
7766f137 956 SAVEVPTR(PL_curpm);
a0d0e21e 957
3280af22 958 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 959 SvTEMP_off(src);
59f00321
RGS
960 if (PL_op->op_private & OPpGREP_LEX)
961 PAD_SVl(PL_op->op_targ) = src;
962 else
963 DEFSV = src;
a0d0e21e
LW
964
965 PUTBACK;
533c011a 966 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 967 pp_pushmark(); /* push top */
533c011a 968 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
969}
970
a0d0e21e
LW
971PP(pp_mapwhile)
972{
27da23d5 973 dVAR; dSP;
f54cb97a 974 const I32 gimme = GIMME_V;
544f3153 975 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
976 I32 count;
977 I32 shift;
978 SV** src;
ac27b0f5 979 SV** dst;
a0d0e21e 980
544f3153 981 /* first, move source pointer to the next item in the source list */
3280af22 982 ++PL_markstack_ptr[-1];
544f3153
GS
983
984 /* if there are new items, push them into the destination list */
4c90a460 985 if (items && gimme != G_VOID) {
544f3153
GS
986 /* might need to make room back there first */
987 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
988 /* XXX this implementation is very pessimal because the stack
989 * is repeatedly extended for every set of items. Is possible
990 * to do this without any stack extension or copying at all
991 * by maintaining a separate list over which the map iterates
18ef8bea 992 * (like foreach does). --gsar */
544f3153
GS
993
994 /* everything in the stack after the destination list moves
995 * towards the end the stack by the amount of room needed */
996 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
997
998 /* items to shift up (accounting for the moved source pointer) */
999 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
1000
1001 /* This optimization is by Ben Tilly and it does
1002 * things differently from what Sarathy (gsar)
1003 * is describing. The downside of this optimization is
1004 * that leaves "holes" (uninitialized and hopefully unused areas)
1005 * to the Perl stack, but on the other hand this
1006 * shouldn't be a problem. If Sarathy's idea gets
1007 * implemented, this optimization should become
1008 * irrelevant. --jhi */
1009 if (shift < count)
1010 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1011
924508f0
GS
1012 EXTEND(SP,shift);
1013 src = SP;
1014 dst = (SP += shift);
3280af22
NIS
1015 PL_markstack_ptr[-1] += shift;
1016 *PL_markstack_ptr += shift;
544f3153 1017 while (count--)
a0d0e21e
LW
1018 *dst-- = *src--;
1019 }
544f3153 1020 /* copy the new items down to the destination list */
ac27b0f5 1021 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
1022 if (gimme == G_ARRAY) {
1023 while (items-- > 0)
1024 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1025 }
bfed75c6 1026 else {
22023b26
TP
1027 /* scalar context: we don't care about which values map returns
1028 * (we use undef here). And so we certainly don't want to do mortal
1029 * copies of meaningless values. */
1030 while (items-- > 0) {
b988aa42 1031 (void)POPs;
22023b26
TP
1032 *dst-- = &PL_sv_undef;
1033 }
1034 }
a0d0e21e
LW
1035 }
1036 LEAVE; /* exit inner scope */
1037
1038 /* All done yet? */
3280af22 1039 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1040
1041 (void)POPMARK; /* pop top */
1042 LEAVE; /* exit outer scope */
1043 (void)POPMARK; /* pop src */
3280af22 1044 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1045 (void)POPMARK; /* pop dst */
3280af22 1046 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1047 if (gimme == G_SCALAR) {
7cc47870
RGS
1048 if (PL_op->op_private & OPpGREP_LEX) {
1049 SV* sv = sv_newmortal();
1050 sv_setiv(sv, items);
1051 PUSHs(sv);
1052 }
1053 else {
1054 dTARGET;
1055 XPUSHi(items);
1056 }
a0d0e21e 1057 }
54310121
PP
1058 else if (gimme == G_ARRAY)
1059 SP += items;
a0d0e21e
LW
1060 RETURN;
1061 }
1062 else {
1063 SV *src;
1064
1065 ENTER; /* enter inner scope */
7766f137 1066 SAVEVPTR(PL_curpm);
a0d0e21e 1067
544f3153 1068 /* set $_ to the new source item */
3280af22 1069 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1070 SvTEMP_off(src);
59f00321
RGS
1071 if (PL_op->op_private & OPpGREP_LEX)
1072 PAD_SVl(PL_op->op_targ) = src;
1073 else
1074 DEFSV = src;
a0d0e21e
LW
1075
1076 RETURNOP(cLOGOP->op_other);
1077 }
1078}
1079
a0d0e21e
LW
1080/* Range stuff. */
1081
1082PP(pp_range)
1083{
97aff369 1084 dVAR;
a0d0e21e 1085 if (GIMME == G_ARRAY)
1a67a97c 1086 return NORMAL;
538573f7 1087 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1088 return cLOGOP->op_other;
538573f7 1089 else
1a67a97c 1090 return NORMAL;
a0d0e21e
LW
1091}
1092
1093PP(pp_flip)
1094{
97aff369 1095 dVAR;
39644a26 1096 dSP;
a0d0e21e
LW
1097
1098 if (GIMME == G_ARRAY) {
1a67a97c 1099 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1100 }
1101 else {
1102 dTOPss;
44f8325f 1103 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1104 int flip = 0;
790090df 1105
bfed75c6 1106 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1107 if (GvIO(PL_last_in_gv)) {
1108 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1109 }
1110 else {
fafc274c 1111 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1112 if (gv && GvSV(gv))
1113 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1114 }
bfed75c6
AL
1115 } else {
1116 flip = SvTRUE(sv);
1117 }
1118 if (flip) {
a0d0e21e 1119 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1120 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1121 sv_setiv(targ, 1);
3e3baf6d 1122 SETs(targ);
a0d0e21e
LW
1123 RETURN;
1124 }
1125 else {
1126 sv_setiv(targ, 0);
924508f0 1127 SP--;
1a67a97c 1128 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1129 }
1130 }
c69006e4 1131 sv_setpvn(TARG, "", 0);
a0d0e21e
LW
1132 SETs(targ);
1133 RETURN;
1134 }
1135}
1136
8e9bbdb9
RGS
1137/* This code tries to decide if "$left .. $right" should use the
1138 magical string increment, or if the range is numeric (we make
1139 an exception for .."0" [#18165]). AMS 20021031. */
1140
1141#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1142 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1143 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1144 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1145 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1146 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1147
a0d0e21e
LW
1148PP(pp_flop)
1149{
97aff369 1150 dVAR; dSP;
a0d0e21e
LW
1151
1152 if (GIMME == G_ARRAY) {
1153 dPOPPOPssrl;
86cb7173 1154
5b295bef
RD
1155 SvGETMAGIC(left);
1156 SvGETMAGIC(right);
a0d0e21e 1157
8e9bbdb9 1158 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1159 register IV i, j;
1160 IV max;
4fe3f0fa
MHM
1161 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1162 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1163 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1164 i = SvIV(left);
1165 max = SvIV(right);
bbce6d69 1166 if (max >= i) {
c1ab3db2
AK
1167 j = max - i + 1;
1168 EXTEND_MORTAL(j);
1169 EXTEND(SP, j);
bbce6d69 1170 }
c1ab3db2
AK
1171 else
1172 j = 0;
1173 while (j--) {
901017d6 1174 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1175 PUSHs(sv);
1176 }
1177 }
1178 else {
44f8325f 1179 SV * const final = sv_mortalcopy(right);
13c5b33c 1180 STRLEN len;
823a54a3 1181 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1182
901017d6 1183 SV *sv = sv_mortalcopy(left);
13c5b33c 1184 SvPV_force_nolen(sv);
89ea2908 1185 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1186 XPUSHs(sv);
b15aece3 1187 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1188 break;
a0d0e21e
LW
1189 sv = sv_2mortal(newSVsv(sv));
1190 sv_inc(sv);
1191 }
a0d0e21e
LW
1192 }
1193 }
1194 else {
1195 dTOPss;
901017d6 1196 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1197 int flop = 0;
a0d0e21e 1198 sv_inc(targ);
4e3399f9
YST
1199
1200 if (PL_op->op_private & OPpFLIP_LINENUM) {
1201 if (GvIO(PL_last_in_gv)) {
1202 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1203 }
1204 else {
fafc274c 1205 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1206 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1207 }
1208 }
1209 else {
1210 flop = SvTRUE(sv);
1211 }
1212
1213 if (flop) {
a0d0e21e 1214 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1215 sv_catpvs(targ, "E0");
a0d0e21e
LW
1216 }
1217 SETs(targ);
1218 }
1219
1220 RETURN;
1221}
1222
1223/* Control. */
1224
27da23d5 1225static const char * const context_name[] = {
515afda2
NC
1226 "pseudo-block",
1227 "subroutine",
1228 "eval",
1229 "loop",
1230 "substitution",
1231 "block",
0d863452
RH
1232 "format",
1233 "given",
1234 "when"
515afda2
NC
1235};
1236
76e3520e 1237STATIC I32
06b5626a 1238S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1239{
97aff369 1240 dVAR;
a0d0e21e 1241 register I32 i;
a0d0e21e
LW
1242
1243 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1244 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1245 switch (CxTYPE(cx)) {
a0d0e21e 1246 case CXt_SUBST:
a0d0e21e 1247 case CXt_SUB:
7766f137 1248 case CXt_FORMAT:
a0d0e21e 1249 case CXt_EVAL:
0a753a76 1250 case CXt_NULL:
0d863452
RH
1251 case CXt_GIVEN:
1252 case CXt_WHEN:
e476b1b5 1253 if (ckWARN(WARN_EXITING))
515afda2
NC
1254 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1255 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1256 if (CxTYPE(cx) == CXt_NULL)
1257 return -1;
1258 break;
a0d0e21e 1259 case CXt_LOOP:
a61a7064 1260 if ( !CxLABEL(cx) || strNE(label, CxLABEL(cx)) ) {
cea2e8a9 1261 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
a61a7064 1262 (long)i, CxLABEL(cx)));
a0d0e21e
LW
1263 continue;
1264 }
cea2e8a9 1265 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1266 return i;
1267 }
1268 }
1269 return i;
1270}
1271
0d863452
RH
1272
1273
e50aee73 1274I32
864dbfa3 1275Perl_dowantarray(pTHX)
e50aee73 1276{
97aff369 1277 dVAR;
f54cb97a 1278 const I32 gimme = block_gimme();
54310121
PP
1279 return (gimme == G_VOID) ? G_SCALAR : gimme;
1280}
1281
1282I32
864dbfa3 1283Perl_block_gimme(pTHX)
54310121 1284{
97aff369 1285 dVAR;
06b5626a 1286 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1287 if (cxix < 0)
46fc3d4c 1288 return G_VOID;
e50aee73 1289
54310121 1290 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1291 case G_VOID:
1292 return G_VOID;
54310121 1293 case G_SCALAR:
e50aee73 1294 return G_SCALAR;
54310121
PP
1295 case G_ARRAY:
1296 return G_ARRAY;
1297 default:
cea2e8a9 1298 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1299 /* NOTREACHED */
1300 return 0;
54310121 1301 }
e50aee73
AD
1302}
1303
78f9721b
SM
1304I32
1305Perl_is_lvalue_sub(pTHX)
1306{
97aff369 1307 dVAR;
06b5626a 1308 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1309 assert(cxix >= 0); /* We should only be called from inside subs */
1310
bafb2adc
NC
1311 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1312 return CxLVAL(cxstack + cxix);
78f9721b
SM
1313 else
1314 return 0;
1315}
1316
76e3520e 1317STATIC I32
901017d6 1318S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1319{
97aff369 1320 dVAR;
a0d0e21e 1321 I32 i;
a0d0e21e 1322 for (i = startingblock; i >= 0; i--) {
901017d6 1323 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1324 switch (CxTYPE(cx)) {
a0d0e21e
LW
1325 default:
1326 continue;
1327 case CXt_EVAL:
1328 case CXt_SUB:
7766f137 1329 case CXt_FORMAT:
cea2e8a9 1330 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1331 return i;
1332 }
1333 }
1334 return i;
1335}
1336
76e3520e 1337STATIC I32
cea2e8a9 1338S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1339{
97aff369 1340 dVAR;
a0d0e21e 1341 I32 i;
a0d0e21e 1342 for (i = startingblock; i >= 0; i--) {
06b5626a 1343 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1344 switch (CxTYPE(cx)) {
a0d0e21e
LW
1345 default:
1346 continue;
1347 case CXt_EVAL:
cea2e8a9 1348 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1349 return i;
1350 }
1351 }
1352 return i;
1353}
1354
76e3520e 1355STATIC I32
cea2e8a9 1356S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1357{
97aff369 1358 dVAR;
a0d0e21e 1359 I32 i;
a0d0e21e 1360 for (i = startingblock; i >= 0; i--) {
901017d6 1361 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1362 switch (CxTYPE(cx)) {
a0d0e21e 1363 case CXt_SUBST:
a0d0e21e 1364 case CXt_SUB:
7766f137 1365 case CXt_FORMAT:
a0d0e21e 1366 case CXt_EVAL:
0a753a76 1367 case CXt_NULL:
e476b1b5 1368 if (ckWARN(WARN_EXITING))
515afda2
NC
1369 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1370 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1371 if ((CxTYPE(cx)) == CXt_NULL)
1372 return -1;
1373 break;
a0d0e21e 1374 case CXt_LOOP:
cea2e8a9 1375 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1376 return i;
1377 }
1378 }
1379 return i;
1380}
1381
0d863452
RH
1382STATIC I32
1383S_dopoptogiven(pTHX_ I32 startingblock)
1384{
97aff369 1385 dVAR;
0d863452
RH
1386 I32 i;
1387 for (i = startingblock; i >= 0; i--) {
1388 register const PERL_CONTEXT *cx = &cxstack[i];
1389 switch (CxTYPE(cx)) {
1390 default:
1391 continue;
1392 case CXt_GIVEN:
1393 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1394 return i;
1395 case CXt_LOOP:
1396 if (CxFOREACHDEF(cx)) {
1397 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1398 return i;
1399 }
1400 }
1401 }
1402 return i;
1403}
1404
1405STATIC I32
1406S_dopoptowhen(pTHX_ I32 startingblock)
1407{
97aff369 1408 dVAR;
0d863452
RH
1409 I32 i;
1410 for (i = startingblock; i >= 0; i--) {
1411 register const PERL_CONTEXT *cx = &cxstack[i];
1412 switch (CxTYPE(cx)) {
1413 default:
1414 continue;
1415 case CXt_WHEN:
1416 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1417 return i;
1418 }
1419 }
1420 return i;
1421}
1422
a0d0e21e 1423void
864dbfa3 1424Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1425{
97aff369 1426 dVAR;
a0d0e21e
LW
1427 I32 optype;
1428
1429 while (cxstack_ix > cxix) {
b0d9ce38 1430 SV *sv;
06b5626a 1431 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1432 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1433 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1434 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1435 switch (CxTYPE(cx)) {
c90c0ff4
PP
1436 case CXt_SUBST:
1437 POPSUBST(cx);
1438 continue; /* not break */
a0d0e21e 1439 case CXt_SUB:
b0d9ce38
GS
1440 POPSUB(cx,sv);
1441 LEAVESUB(sv);
a0d0e21e
LW
1442 break;
1443 case CXt_EVAL:
1444 POPEVAL(cx);
1445 break;
1446 case CXt_LOOP:
1447 POPLOOP(cx);
1448 break;
0a753a76 1449 case CXt_NULL:
a0d0e21e 1450 break;
7766f137
GS
1451 case CXt_FORMAT:
1452 POPFORMAT(cx);
1453 break;
a0d0e21e 1454 }
c90c0ff4 1455 cxstack_ix--;
a0d0e21e 1456 }
1b6737cc 1457 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1458}
1459
5a844595
GS
1460void
1461Perl_qerror(pTHX_ SV *err)
1462{
97aff369 1463 dVAR;
5a844595
GS
1464 if (PL_in_eval)
1465 sv_catsv(ERRSV, err);
1466 else if (PL_errors)
1467 sv_catsv(PL_errors, err);
1468 else
be2597df 1469 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1470 if (PL_parser)
1471 ++PL_parser->error_count;
5a844595
GS
1472}
1473
a0d0e21e 1474OP *
35a4481c 1475Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1476{
27da23d5 1477 dVAR;
87582a92 1478
3280af22 1479 if (PL_in_eval) {
a0d0e21e 1480 I32 cxix;
a0d0e21e 1481 I32 gimme;
a0d0e21e 1482
4e6ea2c3 1483 if (message) {
faef0170 1484 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1485 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1486 SV * const err = ERRSV;
c445ea15 1487 const char *e = NULL;
98eae8f5 1488 if (!SvPOK(err))
c69006e4 1489 sv_setpvn(err,"",0);
98eae8f5 1490 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1491 STRLEN len;
349d4f2f 1492 e = SvPV_const(err, len);
0510663f 1493 e += len - msglen;
98eae8f5 1494 if (*e != *message || strNE(e,message))
c445ea15 1495 e = NULL;
98eae8f5
GS
1496 }
1497 if (!e) {
1498 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1499 sv_catpvn(err, prefix, sizeof(prefix)-1);
1500 sv_catpvn(err, message, msglen);
e476b1b5 1501 if (ckWARN(WARN_MISC)) {
504618e9 1502 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1503 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1504 }
4633a7c4 1505 }
4633a7c4 1506 }
1aa99e6b 1507 else {
06bf62c7 1508 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1509 }
4633a7c4 1510 }
4e6ea2c3 1511
5a844595
GS
1512 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1513 && PL_curstackinfo->si_prev)
1514 {
bac4b2ad 1515 dounwind(-1);
d3acc0f7 1516 POPSTACK;
bac4b2ad 1517 }
e336de0d 1518
a0d0e21e
LW
1519 if (cxix >= 0) {
1520 I32 optype;
35a4481c 1521 register PERL_CONTEXT *cx;
901017d6 1522 SV **newsp;
a0d0e21e
LW
1523
1524 if (cxix < cxstack_ix)
1525 dounwind(cxix);
1526
3280af22 1527 POPBLOCK(cx,PL_curpm);
6b35e009 1528 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1529 if (!message)
349d4f2f 1530 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1531 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1532 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1533 my_exit(1);
1534 }
1535 POPEVAL(cx);
1536
1537 if (gimme == G_SCALAR)
3280af22
NIS
1538 *++newsp = &PL_sv_undef;
1539 PL_stack_sp = newsp;
a0d0e21e
LW
1540
1541 LEAVE;
748a9306 1542
7fb6a879
GS
1543 /* LEAVE could clobber PL_curcop (see save_re_context())
1544 * XXX it might be better to find a way to avoid messing with
1545 * PL_curcop in save_re_context() instead, but this is a more
1546 * minimal fix --GSAR */
1547 PL_curcop = cx->blk_oldcop;
1548
7a2e2cd6 1549 if (optype == OP_REQUIRE) {
44f8325f 1550 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1551 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1552 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1553 &PL_sv_undef, 0);
5a844595
GS
1554 DIE(aTHX_ "%sCompilation failed in require",
1555 *msg ? msg : "Unknown error\n");
7a2e2cd6 1556 }
f39bc417
DM
1557 assert(CxTYPE(cx) == CXt_EVAL);
1558 return cx->blk_eval.retop;
a0d0e21e
LW
1559 }
1560 }
9cc2fdd3 1561 if (!message)
349d4f2f 1562 message = SvPVx_const(ERRSV, msglen);
87582a92 1563
7ff03255 1564 write_to_stderr(message, msglen);
f86702cc
PP
1565 my_failure_exit();
1566 /* NOTREACHED */
a0d0e21e
LW
1567 return 0;
1568}
1569
1570PP(pp_xor)
1571{
97aff369 1572 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1573 if (SvTRUE(left) != SvTRUE(right))
1574 RETSETYES;
1575 else
1576 RETSETNO;
1577}
1578
a0d0e21e
LW
1579PP(pp_caller)
1580{
97aff369 1581 dVAR;
39644a26 1582 dSP;
a0d0e21e 1583 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1584 register const PERL_CONTEXT *cx;
1585 register const PERL_CONTEXT *ccstack = cxstack;
1586 const PERL_SI *top_si = PL_curstackinfo;
54310121 1587 I32 gimme;
06b5626a 1588 const char *stashname;
a0d0e21e
LW
1589 I32 count = 0;
1590
1591 if (MAXARG)
1592 count = POPi;
27d41816 1593
a0d0e21e 1594 for (;;) {
2c375eb9
GS
1595 /* we may be in a higher stacklevel, so dig down deeper */
1596 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1597 top_si = top_si->si_prev;
1598 ccstack = top_si->si_cxstack;
1599 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1600 }
a0d0e21e 1601 if (cxix < 0) {
27d41816
DM
1602 if (GIMME != G_ARRAY) {
1603 EXTEND(SP, 1);
a0d0e21e 1604 RETPUSHUNDEF;
27d41816 1605 }
a0d0e21e
LW
1606 RETURN;
1607 }
f2a7f298 1608 /* caller() should not report the automatic calls to &DB::sub */
1609 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1610 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1611 count++;
1612 if (!count--)
1613 break;
2c375eb9 1614 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1615 }
2c375eb9
GS
1616
1617 cx = &ccstack[cxix];
7766f137 1618 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1619 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1620 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1621 field below is defined for any cx. */
f2a7f298 1622 /* caller() should not report the automatic calls to &DB::sub */
1623 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1624 cx = &ccstack[dbcxix];
06a5b730
PP
1625 }
1626
ed094faf 1627 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1628 if (GIMME != G_ARRAY) {
27d41816 1629 EXTEND(SP, 1);
ed094faf 1630 if (!stashname)
3280af22 1631 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1632 else {
1633 dTARGET;
ed094faf 1634 sv_setpv(TARG, stashname);
49d8d3a1
MB
1635 PUSHs(TARG);
1636 }
a0d0e21e
LW
1637 RETURN;
1638 }
a0d0e21e 1639
b3ca2e83 1640 EXTEND(SP, 11);
27d41816 1641
ed094faf 1642 if (!stashname)
3280af22 1643 PUSHs(&PL_sv_undef);
49d8d3a1 1644 else
6e449a3a
MHM
1645 mPUSHs(newSVpv(stashname, 0));
1646 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1647 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW
1648 if (!MAXARG)
1649 RETURN;
7766f137 1650 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1651 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1652 /* So is ccstack[dbcxix]. */
07b8c804 1653 if (isGV(cvgv)) {
561b68a9 1654 SV * const sv = newSV(0);
c445ea15 1655 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1656 mPUSHs(sv);
bf38a478 1657 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1658 }
1659 else {
84bafc02 1660 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1661 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1662 }
a0d0e21e
LW
1663 }
1664 else {
84bafc02 1665 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1666 mPUSHi(0);
a0d0e21e 1667 }
54310121
PP
1668 gimme = (I32)cx->blk_gimme;
1669 if (gimme == G_VOID)
3280af22 1670 PUSHs(&PL_sv_undef);
54310121 1671 else
98625aca 1672 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1673 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1674 /* eval STRING */
06a5b730 1675 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1676 PUSHs(cx->blk_eval.cur_text);
3280af22 1677 PUSHs(&PL_sv_no);
0f79a09d 1678 }
811a4de9 1679 /* require */
0f79a09d 1680 else if (cx->blk_eval.old_namesv) {
6e449a3a 1681 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1682 PUSHs(&PL_sv_yes);
06a5b730 1683 }
811a4de9
GS
1684 /* eval BLOCK (try blocks have old_namesv == 0) */
1685 else {
1686 PUSHs(&PL_sv_undef);
1687 PUSHs(&PL_sv_undef);
1688 }
4633a7c4 1689 }
a682de96
GS
1690 else {
1691 PUSHs(&PL_sv_undef);
1692 PUSHs(&PL_sv_undef);
1693 }
bafb2adc 1694 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1695 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1696 {
66a1b24b
AL
1697 AV * const ary = cx->blk_sub.argarray;
1698 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1699
3280af22 1700 if (!PL_dbargs) {
71315bf2 1701 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1702 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1703 GvMULTI_on(tmpgv);
3ddcf04c 1704 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1705 }
1706
3280af22
NIS
1707 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1708 av_extend(PL_dbargs, AvFILLp(ary) + off);
1709 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1710 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1711 }
f3aa04c2
GS
1712 /* XXX only hints propagated via op_private are currently
1713 * visible (others are not easily accessible, since they
1714 * use the global PL_hints) */
6e449a3a 1715 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1716 {
1717 SV * mask ;
72dc9ed5 1718 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1719
ac27b0f5 1720 if (old_warnings == pWARN_NONE ||
114bafba 1721 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1722 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1723 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1724 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1725 /* Get the bit mask for $warnings::Bits{all}, because
1726 * it could have been extended by warnings::register */
1727 SV **bits_all;
0bd48802 1728 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1729 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1730 mask = newSVsv(*bits_all);
1731 }
1732 else {
1733 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1734 }
1735 }
e476b1b5 1736 else
72dc9ed5 1737 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1738 mPUSHs(mask);
e476b1b5 1739 }
b3ca2e83 1740
c28fe1ec 1741 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1742 sv_2mortal(newRV_noinc(
c28fe1ec
NC
1743 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1744 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1745 : &PL_sv_undef);
a0d0e21e
LW
1746 RETURN;
1747}
1748
a0d0e21e
LW
1749PP(pp_reset)
1750{
97aff369 1751 dVAR;
39644a26 1752 dSP;
10edeb5d 1753 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1754 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1755 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1756 RETURN;
1757}
1758
dd2155a4
DM
1759/* like pp_nextstate, but used instead when the debugger is active */
1760
a0d0e21e
LW
1761PP(pp_dbstate)
1762{
27da23d5 1763 dVAR;
533c011a 1764 PL_curcop = (COP*)PL_op;
a0d0e21e 1765 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1766 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1767 FREETMPS;
1768
5df8de69
DM
1769 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1770 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1771 {
39644a26 1772 dSP;
c09156bb 1773 register PERL_CONTEXT *cx;
f54cb97a 1774 const I32 gimme = G_ARRAY;
eb160463 1775 U8 hasargs;
0bd48802
AL
1776 GV * const gv = PL_DBgv;
1777 register CV * const cv = GvCV(gv);
a0d0e21e 1778
a0d0e21e 1779 if (!cv)
cea2e8a9 1780 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1781
aea4f609
DM
1782 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1783 /* don't do recursive DB::DB call */
a0d0e21e 1784 return NORMAL;
748a9306 1785
4633a7c4
LW
1786 ENTER;
1787 SAVETMPS;
1788
3280af22 1789 SAVEI32(PL_debug);
55497cff 1790 SAVESTACK_POS();
3280af22 1791 PL_debug = 0;
748a9306 1792 hasargs = 0;
924508f0 1793 SPAGAIN;
748a9306 1794
aed2304a 1795 if (CvISXSUB(cv)) {
c127bd3a
SF
1796 CvDEPTH(cv)++;
1797 PUSHMARK(SP);
1798 (void)(*CvXSUB(cv))(aTHX_ cv);
1799 CvDEPTH(cv)--;
1800 FREETMPS;
1801 LEAVE;
1802 return NORMAL;
1803 }
1804 else {
1805 PUSHBLOCK(cx, CXt_SUB, SP);
1806 PUSHSUB_DB(cx);
1807 cx->blk_sub.retop = PL_op->op_next;
1808 CvDEPTH(cv)++;
1809 SAVECOMPPAD();
1810 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1811 RETURNOP(CvSTART(cv));
1812 }
a0d0e21e
LW
1813 }
1814 else
1815 return NORMAL;
1816}
1817
a0d0e21e
LW
1818PP(pp_enteriter)
1819{
27da23d5 1820 dVAR; dSP; dMARK;
c09156bb 1821 register PERL_CONTEXT *cx;
f54cb97a 1822 const I32 gimme = GIMME_V;
a0d0e21e 1823 SV **svp;
df43650b 1824 U16 cxtype = CXt_LOOP | CXp_FOREACH;
7766f137
GS
1825#ifdef USE_ITHREADS
1826 void *iterdata;
1827#endif
a0d0e21e 1828
4633a7c4
LW
1829 ENTER;
1830 SAVETMPS;
1831
533c011a 1832 if (PL_op->op_targ) {
14f338dc
DM
1833 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1834 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1835 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1836 SVs_PADSTALE, SVs_PADSTALE);
1837 }
c3564e5c 1838#ifndef USE_ITHREADS
dd2155a4 1839 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
54b9620d 1840 SAVESPTR(*svp);
c3564e5c
GS
1841#else
1842 SAVEPADSV(PL_op->op_targ);
cbfa9890 1843 iterdata = INT2PTR(void*, PL_op->op_targ);
7766f137
GS
1844 cxtype |= CXp_PADVAR;
1845#endif
54b9620d
MB
1846 }
1847 else {
0bd48802 1848 GV * const gv = (GV*)POPs;
7766f137 1849 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1850 SAVEGENERICSV(*svp);
561b68a9 1851 *svp = newSV(0);
7766f137
GS
1852#ifdef USE_ITHREADS
1853 iterdata = (void*)gv;
1854#endif
54b9620d 1855 }
4633a7c4 1856
0d863452
RH
1857 if (PL_op->op_private & OPpITER_DEF)
1858 cxtype |= CXp_FOR_DEF;
1859
a0d0e21e
LW
1860 ENTER;
1861
7766f137
GS
1862 PUSHBLOCK(cx, cxtype, SP);
1863#ifdef USE_ITHREADS
1864 PUSHLOOP(cx, iterdata, MARK);
1865#else
a0d0e21e 1866 PUSHLOOP(cx, svp, MARK);
7766f137 1867#endif
533c011a 1868 if (PL_op->op_flags & OPf_STACKED) {
44a8e56a 1869 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
89ea2908
GA
1870 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1871 dPOPss;
0bd48802 1872 SV * const right = (SV*)cx->blk_loop.iterary;
984a4bea
RD
1873 SvGETMAGIC(sv);
1874 SvGETMAGIC(right);
4fe3f0fa 1875 if (RANGE_IS_NUMERIC(sv,right)) {
a2309040
JH
1876#ifdef NV_PRESERVES_UV
1877 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1878 (SvNV(sv) > (NV)IV_MAX)))
1879 ||
1880 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1881 (SvNV(right) < (NV)IV_MIN))))
1882#else
1883 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1884 ||
1885 ((SvNV(sv) > 0) &&
1886 ((SvUV(sv) > (UV)IV_MAX) ||
1887 (SvNV(sv) > (NV)UV_MAX)))))
1888 ||
1889 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1890 ||
1891 ((SvNV(right) > 0) &&
1892 ((SvUV(right) > (UV)IV_MAX) ||
1893 (SvNV(right) > (NV)UV_MAX))))))
1894#endif
076d9a11
MHM
1895 DIE(aTHX_ "Range iterator outside integer range");
1896 cx->blk_loop.iterix = SvIV(sv);
4fe3f0fa 1897 cx->blk_loop.itermax = SvIV(right);
d4665a05
DM
1898#ifdef DEBUGGING
1899 /* for correct -Dstv display */
1900 cx->blk_oldsp = sp - PL_stack_base;
1901#endif
89ea2908 1902 }
3f63a782 1903 else {
89ea2908 1904 cx->blk_loop.iterlval = newSVsv(sv);
13c5b33c 1905 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
10516c54 1906 (void) SvPV_nolen_const(right);
3f63a782 1907 }
89ea2908 1908 }
ef3e5ea9 1909 else if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1910 cx->blk_loop.itermax = 0;
1911 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary) + 1;
ef3e5ea9
NC
1912
1913 }
89ea2908 1914 }
4633a7c4 1915 else {
3280af22
NIS
1916 cx->blk_loop.iterary = PL_curstack;
1917 AvFILLp(PL_curstack) = SP - PL_stack_base;
ef3e5ea9 1918 if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1919 cx->blk_loop.itermax = MARK - PL_stack_base + 1;
1920 cx->blk_loop.iterix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1921 }
1922 else {
1923 cx->blk_loop.iterix = MARK - PL_stack_base;
1924 }
4633a7c4 1925 }
a0d0e21e
LW
1926
1927 RETURN;
1928}
1929
1930PP(pp_enterloop)
1931{
27da23d5 1932 dVAR; dSP;
c09156bb 1933 register PERL_CONTEXT *cx;
f54cb97a 1934 const I32 gimme = GIMME_V;
a0d0e21e
LW
1935
1936 ENTER;
1937 SAVETMPS;
1938 ENTER;
1939
1940 PUSHBLOCK(cx, CXt_LOOP, SP);
1941 PUSHLOOP(cx, 0, SP);
1942
1943 RETURN;
1944}
1945
1946PP(pp_leaveloop)
1947{
27da23d5 1948 dVAR; dSP;
c09156bb 1949 register PERL_CONTEXT *cx;
a0d0e21e
LW
1950 I32 gimme;
1951 SV **newsp;
1952 PMOP *newpm;
1953 SV **mark;
1954
1955 POPBLOCK(cx,newpm);
3a1b2b9e 1956 assert(CxTYPE(cx) == CXt_LOOP);
4fdae800 1957 mark = newsp;
a8bba7fa 1958 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1959
a1f49e72 1960 TAINT_NOT;
54310121 1961 if (gimme == G_VOID)
6f207bd3 1962 NOOP;
54310121
PP
1963 else if (gimme == G_SCALAR) {
1964 if (mark < SP)
1965 *++newsp = sv_mortalcopy(*SP);
1966 else
3280af22 1967 *++newsp = &PL_sv_undef;
a0d0e21e
LW
1968 }
1969 else {
a1f49e72 1970 while (mark < SP) {
a0d0e21e 1971 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
1972 TAINT_NOT; /* Each item is independent */
1973 }
a0d0e21e 1974 }
f86702cc
PP
1975 SP = newsp;
1976 PUTBACK;
1977
a8bba7fa 1978 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 1979 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 1980
a0d0e21e
LW
1981 LEAVE;
1982 LEAVE;
1983
f86702cc 1984 return NORMAL;
a0d0e21e
LW
1985}
1986
1987PP(pp_return)
1988{
27da23d5 1989 dVAR; dSP; dMARK;
c09156bb 1990 register PERL_CONTEXT *cx;
f86702cc 1991 bool popsub2 = FALSE;
b45de488 1992 bool clear_errsv = FALSE;
a0d0e21e
LW
1993 I32 gimme;
1994 SV **newsp;
1995 PMOP *newpm;
1996 I32 optype = 0;
b0d9ce38 1997 SV *sv;
f39bc417 1998 OP *retop;
a0d0e21e 1999
0bd48802
AL
2000 const I32 cxix = dopoptosub(cxstack_ix);
2001
9850bf21
RH
2002 if (cxix < 0) {
2003 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2004 * sort block, which is a CXt_NULL
2005 * not a CXt_SUB */
2006 dounwind(0);
d7507f74
RH
2007 PL_stack_base[1] = *PL_stack_sp;
2008 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2009 return 0;
2010 }
9850bf21
RH
2011 else
2012 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2013 }
a0d0e21e
LW
2014 if (cxix < cxstack_ix)
2015 dounwind(cxix);
2016
d7507f74
RH
2017 if (CxMULTICALL(&cxstack[cxix])) {
2018 gimme = cxstack[cxix].blk_gimme;
2019 if (gimme == G_VOID)
2020 PL_stack_sp = PL_stack_base;
2021 else if (gimme == G_SCALAR) {
2022 PL_stack_base[1] = *PL_stack_sp;
2023 PL_stack_sp = PL_stack_base + 1;
2024 }
9850bf21 2025 return 0;
d7507f74 2026 }
9850bf21 2027
a0d0e21e 2028 POPBLOCK(cx,newpm);
6b35e009 2029 switch (CxTYPE(cx)) {
a0d0e21e 2030 case CXt_SUB:
f86702cc 2031 popsub2 = TRUE;
f39bc417 2032 retop = cx->blk_sub.retop;
5dd42e15 2033 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2034 break;
2035 case CXt_EVAL:
b45de488
GS
2036 if (!(PL_in_eval & EVAL_KEEPERR))
2037 clear_errsv = TRUE;
a0d0e21e 2038 POPEVAL(cx);
f39bc417 2039 retop = cx->blk_eval.retop;
1d76a5c3
GS
2040 if (CxTRYBLOCK(cx))
2041 break;
067f92a0 2042 lex_end();
748a9306
LW
2043 if (optype == OP_REQUIRE &&
2044 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2045 {
54310121 2046 /* Unassume the success we assumed earlier. */
901017d6 2047 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2048 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2049 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2050 }
a0d0e21e 2051 break;
7766f137
GS
2052 case CXt_FORMAT:
2053 POPFORMAT(cx);
f39bc417 2054 retop = cx->blk_sub.retop;
7766f137 2055 break;
a0d0e21e 2056 default:
cea2e8a9 2057 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2058 }
2059
a1f49e72 2060 TAINT_NOT;
a0d0e21e 2061 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2062 if (MARK < SP) {
2063 if (popsub2) {
a8bba7fa 2064 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2065 if (SvTEMP(TOPs)) {
2066 *++newsp = SvREFCNT_inc(*SP);
2067 FREETMPS;
2068 sv_2mortal(*newsp);
959e3673
GS
2069 }
2070 else {
2071 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2072 FREETMPS;
959e3673
GS
2073 *++newsp = sv_mortalcopy(sv);
2074 SvREFCNT_dec(sv);
a29cdaf0 2075 }
959e3673
GS
2076 }
2077 else
a29cdaf0 2078 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2079 }
2080 else
a29cdaf0 2081 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2082 }
2083 else
3280af22 2084 *++newsp = &PL_sv_undef;
a0d0e21e 2085 }
54310121 2086 else if (gimme == G_ARRAY) {
a1f49e72 2087 while (++MARK <= SP) {
f86702cc
PP
2088 *++newsp = (popsub2 && SvTEMP(*MARK))
2089 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2090 TAINT_NOT; /* Each item is independent */
2091 }
a0d0e21e 2092 }
3280af22 2093 PL_stack_sp = newsp;
a0d0e21e 2094
5dd42e15 2095 LEAVE;
f86702cc
PP
2096 /* Stack values are safe: */
2097 if (popsub2) {
5dd42e15 2098 cxstack_ix--;
b0d9ce38 2099 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2100 }
b0d9ce38 2101 else
c445ea15 2102 sv = NULL;
3280af22 2103 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2104
b0d9ce38 2105 LEAVESUB(sv);
b45de488 2106 if (clear_errsv)
c69006e4 2107 sv_setpvn(ERRSV,"",0);
f39bc417 2108 return retop;
a0d0e21e
LW
2109}
2110
2111PP(pp_last)
2112{
27da23d5 2113 dVAR; dSP;
a0d0e21e 2114 I32 cxix;
c09156bb 2115 register PERL_CONTEXT *cx;
f86702cc 2116 I32 pop2 = 0;
a0d0e21e 2117 I32 gimme;
8772537c 2118 I32 optype;
a0d0e21e
LW
2119 OP *nextop;
2120 SV **newsp;
2121 PMOP *newpm;
a8bba7fa 2122 SV **mark;
c445ea15 2123 SV *sv = NULL;
9d4ba2ae 2124
a0d0e21e 2125
533c011a 2126 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2127 cxix = dopoptoloop(cxstack_ix);
2128 if (cxix < 0)
a651a37d 2129 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2130 }
2131 else {
2132 cxix = dopoptolabel(cPVOP->op_pv);
2133 if (cxix < 0)
cea2e8a9 2134 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2135 }
2136 if (cxix < cxstack_ix)
2137 dounwind(cxix);
2138
2139 POPBLOCK(cx,newpm);
5dd42e15 2140 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2141 mark = newsp;
6b35e009 2142 switch (CxTYPE(cx)) {
a0d0e21e 2143 case CXt_LOOP:
f86702cc 2144 pop2 = CXt_LOOP;
a8bba7fa 2145 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2146 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2147 break;
f86702cc 2148 case CXt_SUB:
f86702cc 2149 pop2 = CXt_SUB;
f39bc417 2150 nextop = cx->blk_sub.retop;
a0d0e21e 2151 break;
f86702cc
PP
2152 case CXt_EVAL:
2153 POPEVAL(cx);
f39bc417 2154 nextop = cx->blk_eval.retop;
a0d0e21e 2155 break;
7766f137
GS
2156 case CXt_FORMAT:
2157 POPFORMAT(cx);
f39bc417 2158 nextop = cx->blk_sub.retop;
7766f137 2159 break;
a0d0e21e 2160 default:
cea2e8a9 2161 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2162 }
2163
a1f49e72 2164 TAINT_NOT;
a0d0e21e 2165 if (gimme == G_SCALAR) {
f86702cc
PP
2166 if (MARK < SP)
2167 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2168 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2169 else
3280af22 2170 *++newsp = &PL_sv_undef;
a0d0e21e 2171 }
54310121 2172 else if (gimme == G_ARRAY) {
a1f49e72 2173 while (++MARK <= SP) {
f86702cc
PP
2174 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2175 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2176 TAINT_NOT; /* Each item is independent */
2177 }
f86702cc
PP
2178 }
2179 SP = newsp;
2180 PUTBACK;
2181
5dd42e15
DM
2182 LEAVE;
2183 cxstack_ix--;
f86702cc
PP
2184 /* Stack values are safe: */
2185 switch (pop2) {
2186 case CXt_LOOP:
a8bba7fa 2187 POPLOOP(cx); /* release loop vars ... */
4fdae800 2188 LEAVE;
f86702cc
PP
2189 break;
2190 case CXt_SUB:
b0d9ce38 2191 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2192 break;
a0d0e21e 2193 }
3280af22 2194 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2195
b0d9ce38 2196 LEAVESUB(sv);
9d4ba2ae
AL
2197 PERL_UNUSED_VAR(optype);
2198 PERL_UNUSED_VAR(gimme);
f86702cc 2199 return nextop;
a0d0e21e
LW
2200}
2201
2202PP(pp_next)
2203{
27da23d5 2204 dVAR;
a0d0e21e 2205 I32 cxix;
c09156bb 2206 register PERL_CONTEXT *cx;
85538317 2207 I32 inner;
a0d0e21e 2208
533c011a 2209 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2210 cxix = dopoptoloop(cxstack_ix);
2211 if (cxix < 0)
a651a37d 2212 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2213 }
2214 else {
2215 cxix = dopoptolabel(cPVOP->op_pv);
2216 if (cxix < 0)
cea2e8a9 2217 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2218 }
2219 if (cxix < cxstack_ix)
2220 dounwind(cxix);
2221
85538317
GS
2222 /* clear off anything above the scope we're re-entering, but
2223 * save the rest until after a possible continue block */
2224 inner = PL_scopestack_ix;
1ba6ee2b 2225 TOPBLOCK(cx);
85538317
GS
2226 if (PL_scopestack_ix < inner)
2227 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2228 PL_curcop = cx->blk_oldcop;
022eaa24 2229 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2230}
2231
2232PP(pp_redo)
2233{
27da23d5 2234 dVAR;
a0d0e21e 2235 I32 cxix;
c09156bb 2236 register PERL_CONTEXT *cx;
a0d0e21e 2237 I32 oldsave;
a034e688 2238 OP* redo_op;
a0d0e21e 2239
533c011a 2240 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2241 cxix = dopoptoloop(cxstack_ix);
2242 if (cxix < 0)
a651a37d 2243 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2244 }
2245 else {
2246 cxix = dopoptolabel(cPVOP->op_pv);
2247 if (cxix < 0)
cea2e8a9 2248 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2249 }
2250 if (cxix < cxstack_ix)
2251 dounwind(cxix);
2252
022eaa24 2253 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2254 if (redo_op->op_type == OP_ENTER) {
2255 /* pop one less context to avoid $x being freed in while (my $x..) */
2256 cxstack_ix++;
2257 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2258 redo_op = redo_op->op_next;
2259 }
2260
a0d0e21e 2261 TOPBLOCK(cx);
3280af22 2262 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2263 LEAVE_SCOPE(oldsave);
936c78b5 2264 FREETMPS;
3a1b2b9e 2265 PL_curcop = cx->blk_oldcop;
a034e688 2266 return redo_op;
a0d0e21e
LW
2267}
2268
0824fdcb 2269STATIC OP *
bfed75c6 2270S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2271{
97aff369 2272 dVAR;
a0d0e21e 2273 OP **ops = opstack;
bfed75c6 2274 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2275
fc36a67e 2276 if (ops >= oplimit)
cea2e8a9 2277 Perl_croak(aTHX_ too_deep);
11343788
MB
2278 if (o->op_type == OP_LEAVE ||
2279 o->op_type == OP_SCOPE ||
2280 o->op_type == OP_LEAVELOOP ||
33d34e4c 2281 o->op_type == OP_LEAVESUB ||
11343788 2282 o->op_type == OP_LEAVETRY)
fc36a67e 2283 {
5dc0d613 2284 *ops++ = cUNOPo->op_first;
fc36a67e 2285 if (ops >= oplimit)
cea2e8a9 2286 Perl_croak(aTHX_ too_deep);
fc36a67e 2287 }
c4aa4e48 2288 *ops = 0;
11343788 2289 if (o->op_flags & OPf_KIDS) {
aec46f14 2290 OP *kid;
a0d0e21e 2291 /* First try all the kids at this level, since that's likeliest. */
11343788 2292 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS
2293 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2294 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW
2295 return kid;
2296 }
11343788 2297 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2298 if (kid == PL_lastgotoprobe)
a0d0e21e 2299 continue;
ed8d0fe2
SM
2300 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2301 if (ops == opstack)
2302 *ops++ = kid;
2303 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2304 ops[-1]->op_type == OP_DBSTATE)
2305 ops[-1] = kid;
2306 else
2307 *ops++ = kid;
2308 }
155aba94 2309 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2310 return o;
a0d0e21e
LW
2311 }
2312 }
c4aa4e48 2313 *ops = 0;
a0d0e21e
LW
2314 return 0;
2315}
2316
a0d0e21e
LW
2317PP(pp_goto)
2318{
27da23d5 2319 dVAR; dSP;
cbbf8932 2320 OP *retop = NULL;
a0d0e21e 2321 I32 ix;
c09156bb 2322 register PERL_CONTEXT *cx;
fc36a67e
PP
2323#define GOTO_DEPTH 64
2324 OP *enterops[GOTO_DEPTH];
cbbf8932 2325 const char *label = NULL;
bfed75c6
AL
2326 const bool do_dump = (PL_op->op_type == OP_DUMP);
2327 static const char must_have_label[] = "goto must have label";
a0d0e21e 2328
533c011a 2329 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2330 SV * const sv = POPs;
a0d0e21e
LW
2331
2332 /* This egregious kludge implements goto &subroutine */
2333 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2334 I32 cxix;
c09156bb 2335 register PERL_CONTEXT *cx;
a0d0e21e
LW
2336 CV* cv = (CV*)SvRV(sv);
2337 SV** mark;
2338 I32 items = 0;
2339 I32 oldsave;
b1464ded 2340 bool reified = 0;
a0d0e21e 2341
e8f7dd13 2342 retry:
4aa0a1f7 2343 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2344 const GV * const gv = CvGV(cv);
e8f7dd13 2345 if (gv) {
7fc63493 2346 GV *autogv;
e8f7dd13
GS
2347 SV *tmpstr;
2348 /* autoloaded stub? */
2349 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2350 goto retry;
2351 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2352 GvNAMELEN(gv), FALSE);
2353 if (autogv && (cv = GvCV(autogv)))
2354 goto retry;
2355 tmpstr = sv_newmortal();
c445ea15 2356 gv_efullname3(tmpstr, gv, NULL);
be2597df 2357 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2358 }
cea2e8a9 2359 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2360 }
2361
a0d0e21e 2362 /* First do some returnish stuff. */
b37c2d43 2363 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2364 FREETMPS;
a0d0e21e
LW
2365 cxix = dopoptosub(cxstack_ix);
2366 if (cxix < 0)
cea2e8a9 2367 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2368 if (cxix < cxstack_ix)
2369 dounwind(cxix);
2370 TOPBLOCK(cx);
2d43a17f 2371 SPAGAIN;
564abe23 2372 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2373 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2374 if (CxREALEVAL(cx))
2375 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2376 else
2377 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2378 }
9850bf21
RH
2379 else if (CxMULTICALL(cx))
2380 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2381 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2382 /* put @_ back onto stack */
a0d0e21e 2383 AV* av = cx->blk_sub.argarray;
bfed75c6 2384
93965878 2385 items = AvFILLp(av) + 1;
a45cdc79
DM
2386 EXTEND(SP, items+1); /* @_ could have been extended. */
2387 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2388 SvREFCNT_dec(GvAV(PL_defgv));
2389 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2390 CLEAR_ARGARRAY(av);
d8b46c1b 2391 /* abandon @_ if it got reified */
62b1ebc2 2392 if (AvREAL(av)) {
b1464ded
DM
2393 reified = 1;
2394 SvREFCNT_dec(av);
d8b46c1b
GS
2395 av = newAV();
2396 av_extend(av, items-1);
11ca45c0 2397 AvREIFY_only(av);
dd2155a4 2398 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2399 }
a0d0e21e 2400 }
aed2304a 2401 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2402 AV* const av = GvAV(PL_defgv);
1fa4e549 2403 items = AvFILLp(av) + 1;
a45cdc79
DM
2404 EXTEND(SP, items+1); /* @_ could have been extended. */
2405 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2406 }
a45cdc79
DM
2407 mark = SP;
2408 SP += items;
6b35e009 2409 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2410 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2411 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2412 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2413 LEAVE_SCOPE(oldsave);
2414
2415 /* Now do some callish stuff. */
2416 SAVETMPS;
5023d17a 2417 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2418 if (CvISXSUB(cv)) {
b37c2d43 2419 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2420 SV **newsp;
2421 I32 gimme;
b1464ded
DM
2422 if (reified) {
2423 I32 index;
2424 for (index=0; index<items; index++)
2425 sv_2mortal(SP[-index]);
2426 }
1fa4e549 2427
b37c2d43
AL
2428 /* XS subs don't have a CxSUB, so pop it */
2429 POPBLOCK(cx, PL_curpm);
2430 /* Push a mark for the start of arglist */
2431 PUSHMARK(mark);
2432 PUTBACK;
2433 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2434 LEAVE;
5eff7df7 2435 return retop;
a0d0e21e
LW
2436 }
2437 else {
b37c2d43 2438 AV* const padlist = CvPADLIST(cv);
6b35e009 2439 if (CxTYPE(cx) == CXt_EVAL) {
3280af22
NIS
2440 PL_in_eval = cx->blk_eval.old_in_eval;
2441 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2442 cx->cx_type = CXt_SUB;
b150fb22 2443 }
a0d0e21e 2444 cx->blk_sub.cv = cv;
1a5b3db4 2445 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2446
a0d0e21e
LW
2447 CvDEPTH(cv)++;
2448 if (CvDEPTH(cv) < 2)
74c765eb 2449 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2450 else {
2b9dff67 2451 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2452 sub_crush_depth(cv);
26019298 2453 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2454 }
fd617465
DM
2455 SAVECOMPPAD();
2456 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2457 if (CxHASARGS(cx))
6d4ff0d2 2458 {
b37c2d43 2459 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2460
3280af22 2461 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2462 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2463 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2464 cx->blk_sub.argarray = av;
a0d0e21e
LW
2465
2466 if (items >= AvMAX(av) + 1) {
b37c2d43 2467 SV **ary = AvALLOC(av);
a0d0e21e
LW
2468 if (AvARRAY(av) != ary) {
2469 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2470 AvARRAY(av) = ary;
a0d0e21e
LW
2471 }
2472 if (items >= AvMAX(av) + 1) {
2473 AvMAX(av) = items - 1;
2474 Renew(ary,items+1,SV*);
2475 AvALLOC(av) = ary;
9c6bc640 2476 AvARRAY(av) = ary;
a0d0e21e
LW
2477 }
2478 }
a45cdc79 2479 ++mark;
a0d0e21e 2480 Copy(mark,AvARRAY(av),items,SV*);
93965878 2481 AvFILLp(av) = items - 1;
d8b46c1b 2482 assert(!AvREAL(av));
b1464ded
DM
2483 if (reified) {
2484 /* transfer 'ownership' of refcnts to new @_ */
2485 AvREAL_on(av);
2486 AvREIFY_off(av);
2487 }
a0d0e21e
LW
2488 while (items--) {
2489 if (*mark)
2490 SvTEMP_off(*mark);
2491 mark++;
2492 }
2493 }
491527d0 2494 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2495 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL
2496 if (PERLDB_GOTO) {
2497 CV * const gotocv = get_cv("DB::goto", FALSE);
2498 if (gotocv) {
2499 PUSHMARK( PL_stack_sp );
2500 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2501 PL_stack_sp--;
2502 }
491527d0 2503 }
1ce6579f 2504 }
a0d0e21e
LW
2505 RETURNOP(CvSTART(cv));
2506 }
2507 }
1614b0e3 2508 else {
0510663f 2509 label = SvPV_nolen_const(sv);
1614b0e3 2510 if (!(do_dump || *label))
cea2e8a9 2511 DIE(aTHX_ must_have_label);
1614b0e3 2512 }
a0d0e21e 2513 }
533c011a 2514 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2515 if (! do_dump)
cea2e8a9 2516 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2517 }
2518 else
2519 label = cPVOP->op_pv;
2520
2521 if (label && *label) {
cbbf8932 2522 OP *gotoprobe = NULL;
3b2447bc 2523 bool leaving_eval = FALSE;
33d34e4c 2524 bool in_block = FALSE;
cbbf8932 2525 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2526
2527 /* find label */
2528
d4c19fe8 2529 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2530 *enterops = 0;
2531 for (ix = cxstack_ix; ix >= 0; ix--) {
2532 cx = &cxstack[ix];
6b35e009 2533 switch (CxTYPE(cx)) {
a0d0e21e 2534 case CXt_EVAL:
3b2447bc 2535 leaving_eval = TRUE;
971ecbe6 2536 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2537 gotoprobe = (last_eval_cx ?
2538 last_eval_cx->blk_eval.old_eval_root :
2539 PL_eval_root);
2540 last_eval_cx = cx;
9c5794fe
RH
2541 break;
2542 }
2543 /* else fall through */
a0d0e21e
LW
2544 case CXt_LOOP:
2545 gotoprobe = cx->blk_oldcop->op_sibling;
2546 break;
2547 case CXt_SUBST:
2548 continue;
2549 case CXt_BLOCK:
33d34e4c 2550 if (ix) {
a0d0e21e 2551 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2552 in_block = TRUE;
2553 } else
3280af22 2554 gotoprobe = PL_main_root;
a0d0e21e 2555 break;
b3933176 2556 case CXt_SUB:
9850bf21 2557 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2558 gotoprobe = CvROOT(cx->blk_sub.cv);
2559 break;
2560 }
2561 /* FALL THROUGH */
7766f137 2562 case CXt_FORMAT:
0a753a76 2563 case CXt_NULL:
a651a37d 2564 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2565 default:
2566 if (ix)
cea2e8a9 2567 DIE(aTHX_ "panic: goto");
3280af22 2568 gotoprobe = PL_main_root;
a0d0e21e
LW
2569 break;
2570 }
2b597662
GS
2571 if (gotoprobe) {
2572 retop = dofindlabel(gotoprobe, label,
2573 enterops, enterops + GOTO_DEPTH);
2574 if (retop)
2575 break;
2576 }
3280af22 2577 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2578 }
2579 if (!retop)
cea2e8a9 2580 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2581
3b2447bc
RH
2582 /* if we're leaving an eval, check before we pop any frames
2583 that we're not going to punt, otherwise the error
2584 won't be caught */
2585
2586 if (leaving_eval && *enterops && enterops[1]) {
2587 I32 i;
2588 for (i = 1; enterops[i]; i++)
2589 if (enterops[i]->op_type == OP_ENTERITER)
2590 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2591 }
2592
a0d0e21e
LW
2593 /* pop unwanted frames */
2594
2595 if (ix < cxstack_ix) {
2596 I32 oldsave;
2597
2598 if (ix < 0)
2599 ix = 0;
2600 dounwind(ix);
2601 TOPBLOCK(cx);
3280af22 2602 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2603 LEAVE_SCOPE(oldsave);
2604 }
2605
2606 /* push wanted frames */
2607
748a9306 2608 if (*enterops && enterops[1]) {
0bd48802 2609 OP * const oldop = PL_op;
33d34e4c
AE
2610 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2611 for (; enterops[ix]; ix++) {
533c011a 2612 PL_op = enterops[ix];
84902520
TB
2613 /* Eventually we may want to stack the needed arguments
2614 * for each op. For now, we punt on the hard ones. */
533c011a 2615 if (PL_op->op_type == OP_ENTERITER)
894356b3 2616 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2617 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2618 }
533c011a 2619 PL_op = oldop;
a0d0e21e
LW
2620 }
2621 }
2622
2623 if (do_dump) {
a5f75d66 2624#ifdef VMS
6b88bc9c 2625 if (!retop) retop = PL_main_start;
a5f75d66 2626#endif
3280af22
NIS
2627 PL_restartop = retop;
2628 PL_do_undump = TRUE;
a0d0e21e
LW
2629
2630 my_unexec();
2631
3280af22
NIS
2632 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2633 PL_do_undump = FALSE;
a0d0e21e
LW
2634 }
2635
2636 RETURNOP(retop);
2637}
2638
2639PP(pp_exit)
2640{
97aff369 2641 dVAR;
39644a26 2642 dSP;
a0d0e21e
LW
2643 I32 anum;
2644
2645 if (MAXARG < 1)
2646 anum = 0;
ff0cee69 2647 else {
a0d0e21e 2648 anum = SvIVx(POPs);
d98f61e7
GS
2649#ifdef VMS
2650 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2651 anum = 0;
96e176bf 2652 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2653#endif
2654 }
cc3604b1 2655 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2656#ifdef PERL_MAD
2657 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2658 if (anum || !(PL_minus_c && PL_madskills))
2659 my_exit(anum);
2660#else
a0d0e21e 2661 my_exit(anum);
81d86705 2662#endif
3280af22 2663 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2664 RETURN;
2665}
2666
a0d0e21e
LW
2667/* Eval. */
2668
0824fdcb 2669STATIC void
cea2e8a9 2670S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2671{
504618e9 2672 const char *s = SvPVX_const(sv);
890ce7af 2673 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2674 I32 line = 1;
a0d0e21e
LW
2675
2676 while (s && s < send) {
f54cb97a 2677 const char *t;
b9f83d2f 2678 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2679
a0d0e21e
LW
2680 t = strchr(s, '\n');
2681 if (t)
2682 t++;
2683 else
2684 t = send;
2685
2686 sv_setpvn(tmpstr, s, t - s);
2687 av_store(array, line++, tmpstr);
2688 s = t;
2689 }
2690}
2691
0824fdcb 2692STATIC OP *
cea2e8a9 2693S_docatch(pTHX_ OP *o)
1e422769 2694{
97aff369 2695 dVAR;
6224f72b 2696 int ret;
06b5626a 2697 OP * const oldop = PL_op;
db36c5a1 2698 dJMPENV;
1e422769 2699
1e422769 2700#ifdef DEBUGGING
54310121 2701 assert(CATCH_GET == TRUE);
1e422769 2702#endif
312caa8e 2703 PL_op = o;
8bffa5f8 2704
14dd3ad8 2705 JMPENV_PUSH(ret);
6224f72b 2706 switch (ret) {
312caa8e 2707 case 0:
abd70938
DM
2708 assert(cxstack_ix >= 0);
2709 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2710 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2711 redo_body:
85aaa934 2712 CALLRUNOPS(aTHX);
312caa8e
CS
2713 break;
2714 case 3:
8bffa5f8 2715 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2716
2717 /* NB XXX we rely on the old popped CxEVAL still being at the top
2718 * of the stack; the way die_where() currently works, this
2719 * assumption is valid. In theory The cur_top_env value should be
2720 * returned in another global, the way retop (aka PL_restartop)
2721 * is. */
2722 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2723
2724 if (PL_restartop
2725 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2726 {
312caa8e
CS
2727 PL_op = PL_restartop;
2728 PL_restartop = 0;
2729 goto redo_body;
2730 }
2731 /* FALL THROUGH */
2732 default:
14dd3ad8 2733 JMPENV_POP;
533c011a 2734 PL_op = oldop;
6224f72b 2735 JMPENV_JUMP(ret);
1e422769 2736 /* NOTREACHED */
1e422769 2737 }
14dd3ad8 2738 JMPENV_POP;
533c011a 2739 PL_op = oldop;
5f66b61c 2740 return NULL;
1e422769
PP
2741}
2742
c277df42 2743OP *
bfed75c6 2744Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2745/* sv Text to convert to OP tree. */
2746/* startop op_free() this to undo. */
2747/* code Short string id of the caller. */
2748{
f7997f86 2749 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2750 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2751 PERL_CONTEXT *cx;
2752 SV **newsp;
b094c71d 2753 I32 gimme = G_VOID;
c277df42
IZ
2754 I32 optype;
2755 OP dummy;
83ee9e09
GS
2756 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2757 char *tmpbuf = tbuf;
c277df42 2758 char *safestr;
a3985cdc 2759 int runtime;
601f1833 2760 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2761 STRLEN len;
c277df42
IZ
2762
2763 ENTER;
5486870f 2764 lex_start(sv, NULL, FALSE);
c277df42
IZ
2765 SAVETMPS;
2766 /* switch to eval mode */
2767
923e4eb5 2768 if (IN_PERL_COMPILETIME) {
f4dd75d9 2769 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2770 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2771 }
83ee9e09 2772 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2773 SV * const sv = sv_newmortal();
83ee9e09
GS
2774 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2775 code, (unsigned long)++PL_evalseq,
2776 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2777 tmpbuf = SvPVX(sv);
fc009855 2778 len = SvCUR(sv);
83ee9e09
GS
2779 }
2780 else
d9fad198
JH
2781 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2782 (unsigned long)++PL_evalseq);
f4dd75d9 2783 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2784 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2785 SAVECOPLINE(&PL_compiling);
57843af0 2786 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2787 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2788 deleting the eval's FILEGV from the stash before gv_check() runs
2789 (i.e. before run-time proper). To work around the coredump that
2790 ensues, we always turn GvMULTI_on for any globals that were
2791 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2792 safestr = savepvn(tmpbuf, len);
2793 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2794 SAVEHINTS();
d1ca3daa 2795#ifdef OP_IN_REGISTER
6b88bc9c 2796 PL_opsave = op;
d1ca3daa 2797#else
7766f137 2798 SAVEVPTR(PL_op);
d1ca3daa 2799#endif
c277df42 2800
a3985cdc 2801 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2802 runtime = IN_PERL_RUNTIME;
a3985cdc 2803 if (runtime)
d819b83a 2804 runcv = find_runcv(NULL);
a3985cdc 2805
533c011a 2806 PL_op = &dummy;
13b51b79 2807 PL_op->op_type = OP_ENTEREVAL;
533c011a 2808 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2809 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
a0714e2c 2810 PUSHEVAL(cx, 0, NULL);
a3985cdc
DM
2811
2812 if (runtime)
410be5db 2813 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2814 else
410be5db 2815 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2816 POPBLOCK(cx,PL_curpm);
e84b9f1f 2817 POPEVAL(cx);
c277df42
IZ
2818
2819 (*startop)->op_type = OP_NULL;
22c35a8c 2820 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2821 lex_end();
f3548bdc 2822 /* XXX DAPM do this properly one year */
b37c2d43 2823 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2824 LEAVE;
923e4eb5 2825 if (IN_PERL_COMPILETIME)
623e6609 2826 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2827#ifdef OP_IN_REGISTER
6b88bc9c 2828 op = PL_opsave;
d1ca3daa 2829#endif
9d4ba2ae
AL
2830 PERL_UNUSED_VAR(newsp);
2831 PERL_UNUSED_VAR(optype);
2832
410be5db 2833 return PL_eval_start;
c277df42
IZ
2834}
2835
a3985cdc
DM
2836
2837/*
2838=for apidoc find_runcv
2839
2840Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2841If db_seqp is non_null, skip CVs that are in the DB package and populate
2842*db_seqp with the cop sequence number at the point that the DB:: code was
2843entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2844than in the scope of the debugger itself).
a3985cdc
DM
2845
2846=cut
2847*/
2848
2849CV*
d819b83a 2850Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2851{
97aff369 2852 dVAR;
a3985cdc 2853 PERL_SI *si;
a3985cdc 2854
d819b83a
DM
2855 if (db_seqp)
2856 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2857 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2858 I32 ix;
a3985cdc 2859 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2860 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2861 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2862 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2863 /* skip DB:: code */
2864 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2865 *db_seqp = cx->blk_oldcop->cop_seq;
2866 continue;
2867 }
2868 return cv;
2869 }
a3985cdc
DM
2870 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2871 return PL_compcv;
2872 }
2873 }
2874 return PL_main_cv;
2875}
2876
2877
2878/* Compile a require/do, an eval '', or a /(?{...})/.
2879 * In the last case, startop is non-null, and contains the address of
2880 * a pointer that should be set to the just-compiled code.
2881 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM
2882 * Returns a bool indicating whether the compile was successful; if so,
2883 * PL_eval_start contains the first op of the compiled ocde; otherwise,
2884 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM
2885 */
2886
410be5db 2887STATIC bool
a3985cdc 2888S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2889{
27da23d5 2890 dVAR; dSP;
46c461b5 2891 OP * const saveop = PL_op;
a0d0e21e 2892
6dc8a9e4
IZ
2893 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2894 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2895 : EVAL_INEVAL);
a0d0e21e 2896
1ce6579f
PP
2897 PUSHMARK(SP);
2898
3280af22 2899 SAVESPTR(PL_compcv);
b9f83d2f 2900 PL_compcv = (CV*)newSV_type(SVt_PVCV);
1aff0e91 2901 CvEVAL_on(PL_compcv);
2090ab20
JH
2902 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2903 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2904
a3985cdc 2905 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2906 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2907
dd2155a4 2908 /* set up a scratch pad */
a0d0e21e 2909
dd2155a4 2910 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2911 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2912
07055b4c 2913
81d86705
NC
2914 if (!PL_madskills)
2915 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2916
a0d0e21e
LW
2917 /* make sure we compile in the right package */
2918
ed094faf 2919 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2920 SAVESPTR(PL_curstash);
ed094faf 2921 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2922 }
3c10abe3 2923 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
2924 SAVESPTR(PL_beginav);
2925 PL_beginav = newAV();
2926 SAVEFREESV(PL_beginav);
3c10abe3
AG
2927 SAVESPTR(PL_unitcheckav);
2928 PL_unitcheckav = newAV();
2929 SAVEFREESV(PL_unitcheckav);
a0d0e21e 2930
81d86705 2931#ifdef PERL_MAD
9da243ce 2932 SAVEBOOL(PL_madskills);
81d86705
NC
2933 PL_madskills = 0;
2934#endif
2935
a0d0e21e
LW
2936 /* try to compile it */
2937
5f66b61c 2938 PL_eval_root = NULL;
3280af22 2939 PL_curcop = &PL_compiling;
fc15ae8f 2940 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2941 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2942 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2943 else
c69006e4 2944 sv_setpvn(ERRSV,"",0);
13765c85 2945 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 2946 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2947 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2948 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2949 const char *msg;
bfed75c6 2950
533c011a 2951 PL_op = saveop;
3280af22
NIS
2952 if (PL_eval_root) {
2953 op_free(PL_eval_root);
5f66b61c 2954 PL_eval_root = NULL;
a0d0e21e 2955 }
3280af22 2956 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2957 if (!startop) {
3280af22 2958 POPBLOCK(cx,PL_curpm);
c277df42 2959 POPEVAL(cx);
c277df42 2960 }
a0d0e21e
LW
2961 lex_end();
2962 LEAVE;
9d4ba2ae
AL
2963
2964 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 2965 if (optype == OP_REQUIRE) {
b464bac0 2966 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 2967 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 2968 &PL_sv_undef, 0);
58d3fd3b
SH
2969 Perl_croak(aTHX_ "%sCompilation failed in require",
2970 *msg ? msg : "Unknown error\n");
5a844595
GS
2971 }
2972 else if (startop) {
3280af22 2973 POPBLOCK(cx,PL_curpm);
c277df42 2974 POPEVAL(cx);
5a844595
GS
2975 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2976 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 2977 }
9d7f88dd 2978 else {
9d7f88dd 2979 if (!*msg) {
6502358f 2980 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
2981 }
2982 }
9d4ba2ae 2983 PERL_UNUSED_VAR(newsp);
410be5db
DM
2984 PUSHs(&PL_sv_undef);
2985 PUTBACK;
2986 return FALSE;
a0d0e21e 2987 }
57843af0 2988 CopLINE_set(&PL_compiling, 0);
c277df42 2989 if (startop) {
3280af22 2990 *startop = PL_eval_root;
c277df42 2991 } else
3280af22 2992 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
2993
2994 /* Set the context for this new optree.
2995 * If the last op is an OP_REQUIRE, force scalar context.
2996 * Otherwise, propagate the context from the eval(). */
2997 if (PL_eval_root->op_type == OP_LEAVEEVAL
2998 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
2999 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
3000 == OP_REQUIRE)
3001 scalar(PL_eval_root);
7df0357e 3002 else if ((gimme & G_WANT) == G_VOID)
3280af22 3003 scalarvoid(PL_eval_root);
7df0357e 3004 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3005 list(PL_eval_root);
a0d0e21e 3006 else
3280af22 3007 scalar(PL_eval_root);
a0d0e21e
LW
3008
3009 DEBUG_x(dump_eval());
3010
55497cff 3011 /* Register with debugger: */
6482a30d 3012 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 3013 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP
3014 if (cv) {
3015 dSP;
924508f0 3016 PUSHMARK(SP);
cc49e20b 3017 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 3018 PUTBACK;
864dbfa3 3019 call_sv((SV*)cv, G_DISCARD);
55497cff
PP
3020 }
3021 }
3022
3c10abe3
AG
3023 if (PL_unitcheckav)
3024 call_list(PL_scopestack_ix, PL_unitcheckav);
3025
a0d0e21e
LW
3026 /* compiled okay, so do it */
3027
3280af22
NIS
3028 CvDEPTH(PL_compcv) = 1;
3029 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3030 PL_op = saveop; /* The caller may need it. */
bc177e6b 3031 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3032
410be5db
DM
3033 PUTBACK;
3034 return TRUE;
a0d0e21e
LW
3035}
3036
a6c40364 3037STATIC PerlIO *
0786552a 3038S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP
3039{
3040 Stat_t st;
c445ea15 3041 const int st_rc = PerlLIO_stat(name, &st);
df528165 3042
6b845e56 3043 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3044 return NULL;
ce8abf5f
SP
3045 }
3046
0786552a 3047 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP
3048}
3049
75c20bac 3050#ifndef PERL_DISABLE_PMC
ce8abf5f 3051STATIC PerlIO *
0786552a 3052S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3053{
b295d113
TH
3054 PerlIO *fp;
3055
ce9440c8 3056 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC
3057 SV *const pmcsv = newSV(namelen + 2);
3058 char *const pmc = SvPVX(pmcsv);
a6c40364 3059 Stat_t pmcstat;
50b8ed39
NC
3060
3061 memcpy(pmc, name, namelen);
3062 pmc[namelen] = 'c';
3063 pmc[namelen + 1] = '\0';
3064
a6c40364 3065 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3066 fp = check_type_and_open(name);
a6c40364
GS
3067 }
3068 else {
0786552a 3069 fp = check_type_and_open(pmc);
b295d113 3070 }
a6c40364
GS
3071 SvREFCNT_dec(pmcsv);
3072 }
3073 else {
0786552a 3074 fp = check_type_and_open(name);
b295d113 3075 }
b295d113 3076 return fp;
75c20bac 3077}
7925835c 3078#else
75c20bac 3079# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3080#endif /* !PERL_DISABLE_PMC */
b295d113 3081
a0d0e21e
LW
3082PP(pp_require)
3083{
27da23d5 3084 dVAR; dSP;
c09156bb 3085 register PERL_CONTEXT *cx;
a0d0e21e 3086 SV *sv;
5c144d81 3087 const char *name;
6132ea6c 3088 STRLEN len;
4492be7a
JM
3089 char * unixname;
3090 STRLEN unixlen;
62f5ad7a 3091#ifdef VMS
4492be7a 3092 int vms_unixname = 0;
62f5ad7a 3093#endif
c445ea15
AL
3094 const char *tryname = NULL;
3095 SV *namesv = NULL;
f54cb97a 3096 const I32 gimme = GIMME_V;
bbed91b5 3097 int filter_has_file = 0;
c445ea15 3098 PerlIO *tryrsfp = NULL;
34113e50 3099 SV *filter_cache = NULL;
c445ea15
AL
3100 SV *filter_state = NULL;
3101 SV *filter_sub = NULL;
3102 SV *hook_sv = NULL;
6ec9efec
JH
3103 SV *encoding;
3104 OP *op;
a0d0e21e
LW
3105
3106 sv = POPs;
d7aa5382 3107 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP
3108 sv = new_version(sv);
3109 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3110 upg_version(PL_patchlevel, TRUE);
149c1637 3111 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3112 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3113 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3114 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3115 }
3116 else {
d1029faa
JP
3117 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3118 I32 first = 0;
3119 AV *lav;
3120 SV * const req = SvRV(sv);
3121 SV * const pv = *hv_fetchs((HV*)req, "original", FALSE);
3122
3123 /* get the left hand term */
3124 lav = (AV *)SvRV(*hv_fetchs((HV*)req, "version", FALSE));
3125
3126 first = SvIV(*av_fetch(lav,0,0));
3127 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
3128 || hv_exists((HV*)req, "qv", 2 ) /* qv style */
3129 || av_len(lav) > 1 /* FP with > 3 digits */
3130 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3131 ) {
3132 DIE(aTHX_ "Perl %"SVf" required--this is only "
3133 "%"SVf", stopped", SVfARG(vnormal(req)),
3134 SVfARG(vnormal(PL_patchlevel)));
3135 }
3136 else { /* probably 'use 5.10' or 'use 5.8' */
3137 SV * hintsv = newSV(0);
3138 I32 second = 0;
3139
3140 if (av_len(lav)>=1)
3141 second = SvIV(*av_fetch(lav,1,0));
3142
3143 second /= second >= 600 ? 100 : 10;
3144 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.%d",
3145 (int)first, (int)second,0);
3146 upg_version(hintsv, TRUE);
3147
3148 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3149 "--this is only %"SVf", stopped",
3150 SVfARG(vnormal(req)),
3151 SVfARG(vnormal(hintsv)),
3152 SVfARG(vnormal(PL_patchlevel)));
3153 }
3154 }
468aa647 3155 }
d7aa5382 3156
fbc891ce
RB
3157 /* We do this only with use, not require. */
3158 if (PL_compcv &&
fbc891ce
RB
3159 /* If we request a version >= 5.9.5, load feature.pm with the
3160 * feature bundle that corresponds to the required version. */
2e8342de 3161 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3162 SV *const importsv = vnormal(sv);
3163 *SvPVX_mutable(importsv) = ':';
3164 ENTER;
3165 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3166 LEAVE;
3167 }
3168
3169 RETPUSHYES;
a0d0e21e 3170 }
5c144d81 3171 name = SvPV_const(sv, len);
6132ea6c 3172 if (!(name && len > 0 && *name))
cea2e8a9 3173 DIE(aTHX_ "Null filename used");
4633a7c4 3174 TAINT_PROPER("require");
4492be7a
JM
3175
3176
3177#ifdef VMS
3178 /* The key in the %ENV hash is in the syntax of file passed as the argument
3179 * usually this is in UNIX format, but sometimes in VMS format, which
3180 * can result in a module being pulled in more than once.
3181 * To prevent this, the key must be stored in UNIX format if the VMS
3182 * name can be translated to UNIX.
3183 */
3184 if ((unixname = tounixspec(name, NULL)) != NULL) {
3185 unixlen = strlen(unixname);
3186 vms_unixname = 1;
3187 }
3188 else
3189#endif
3190 {
3191 /* if not VMS or VMS name can not be translated to UNIX, pass it
3192 * through.
3193 */
3194 unixname = (char *) name;
3195 unixlen = len;
3196 }
44f8325f 3197 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM
3198 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3199 unixname, unixlen, 0);
44f8325f
AL
3200 if ( svp ) {
3201 if (*svp != &PL_sv_undef)
3202 RETPUSHYES;
3203 else
087b5369
RD
3204 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3205 "Compilation failed in require", unixname);
44f8325f 3206 }
4d8b06f1 3207 }
a0d0e21e
LW
3208
3209 /* prepare to compile file */
3210
be4b629d 3211 if (path_is_absolute(name)) {
46fc3d4c 3212 tryname = name;
0786552a 3213 tryrsfp = doopen_pm(name, len);
bf4acbe4 3214 }
67627c52
JH
3215#ifdef MACOS_TRADITIONAL
3216 if (!tryrsfp) {
3217 char newname[256];
3218
3219 MacPerl_CanonDir(name, newname, 1);
3220 if (path_is_absolute(newname)) {
3221 tryname = newname;
0786552a 3222 tryrsfp = doopen_pm(newname, strlen(newname));
67627c52
JH
3223 }
3224 }
3225#endif
be4b629d 3226 if (!tryrsfp) {
44f8325f 3227 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3228 I32 i;
748a9306 3229#ifdef VMS
4492be7a 3230 if (vms_unixname)
46fc3d4c
PP
3231#endif
3232 {
d0328fd7 3233 namesv = newSV_type(SVt_PV);
46fc3d4c 3234 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3235 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3236
c38a6530
RD
3237 if (SvTIED_mg((SV*)ar, PERL_MAGIC_tied))
3238 mg_get(dirsv);
bbed91b5
KF
3239 if (SvROK(dirsv)) {
3240 int count;
a3b58a99 3241 SV **svp;
bbed91b5
KF
3242 SV *loader = dirsv;
3243
e14e2dc8
NC
3244 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3245 && !sv_isobject(loader))
3246 {
bbed91b5
KF
3247 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3248 }
3249
b900a521 3250 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3251 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3252 tryname = SvPVX_const(namesv);
c445ea15 3253 tryrsfp = NULL;
bbed91b5
KF
3254
3255 ENTER;
3256 SAVETMPS;
3257 EXTEND(SP, 2);
3258
3259 PUSHMARK(SP);
3260 PUSHs(dirsv);
3261 PUSHs(sv);
3262 PUTBACK;
e982885c
NC
3263 if (sv_isobject(loader))
3264 count = call_method("INC", G_ARRAY);
3265 else
3266 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3267 SPAGAIN;
3268
a3b58a99
RGS
3269 /* Adjust file name if the hook has set an %INC entry */
3270 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3271 if (svp)
3272 tryname = SvPVX_const(*svp);
3273
bbed91b5
KF
3274 if (count > 0) {
3275 int i = 0;
3276 SV *arg;
3277
3278 SP -= count - 1;
3279 arg = SP[i++];
3280
34113e50
NC
3281 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3282 && !isGV_with_GP(SvRV(arg))) {
3283 filter_cache = SvRV(arg);
74c765eb 3284 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3285
3286 if (i < count) {
3287 arg = SP[i++];
3288 }
3289 }
3290
bbed91b5
KF
3291 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3292 arg = SvRV(arg);
3293 }
3294
3295 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3296 IO * const io = GvIO((GV *)arg);
bbed91b5
KF
3297
3298 ++filter_has_file;
3299
3300 if (io) {
3301 tryrsfp = IoIFP(io);
0f7de14d
NC
3302 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3303 PerlIO_close(IoOFP(io));
bbed91b5 3304 }
0f7de14d
NC
3305 IoIFP(io) = NULL;
3306 IoOFP(io) = NULL;
bbed91b5
KF
3307 }
3308
3309 if (i < count) {
3310 arg = SP[i++];
3311 }
3312 }
3313
3314 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3315 filter_sub = arg;
74c765eb 3316 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF
3317
3318 if (i < count) {
3319 filter_state = SP[i];
b37c2d43 3320 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3321 }
34113e50 3322 }
bbed91b5 3323
34113e50
NC
3324 if (!tryrsfp && (filter_cache || filter_sub)) {
3325 tryrsfp = PerlIO_open(BIT_BUCKET,
3326 PERL_SCRIPT_MODE);
bbed91b5 3327 }
1d06aecd 3328 SP--;
bbed91b5
KF
3329 }
3330
3331 PUTBACK;
3332 FREETMPS;
3333 LEAVE;
3334
3335 if (tryrsfp) {
89ccab8c 3336 hook_sv = dirsv;
bbed91b5
KF
3337 break;
3338 }
3339
3340 filter_has_file = 0;
34113e50
NC
3341 if (filter_cache) {
3342 SvREFCNT_dec(filter_cache);
3343 filter_cache = NULL;
3344 }
bbed91b5
KF
3345 if (filter_state) {
3346 SvREFCNT_dec(filter_state);
c445ea15 3347 filter_state = NULL;
bbed91b5
KF
3348 }
3349 if (filter_sub) {
3350 SvREFCNT_dec(filter_sub);
c445ea15 3351 filter_sub = NULL;
bbed91b5
KF
3352 }
3353 }
3354 else {
be4b629d
CN
3355 if (!path_is_absolute(name)
3356#ifdef MACOS_TRADITIONAL
3357 /* We consider paths of the form :a:b ambiguous and interpret them first
3358 as global then as local
3359 */
3360 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3361#endif
3362 ) {
b640a14a
NC
3363 const char *dir;
3364 STRLEN dirlen;
3365
3366 if (SvOK(dirsv)) {
3367 dir = SvPV_const(dirsv, dirlen);
3368 } else {
3369 dir = "";
3370 dirlen = 0;
3371 }
3372
bf4acbe4 3373#ifdef MACOS_TRADITIONAL
67627c52
JH
3374 char buf1[256];
3375 char buf2[256];
3376
3377 MacPerl_CanonDir(name, buf2, 1);
3378 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3379#else
27da23d5 3380# ifdef VMS
bbed91b5 3381 char *unixdir;
c445ea15 3382 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF
3383 continue;
3384 sv_setpv(namesv, unixdir);
3385 sv_catpv(namesv, unixname);
27da23d5 3386# else
a0fd4948 3387# ifdef __SYMBIAN32__
27da23d5
JH
3388 if (PL_origfilename[0] &&
3389 PL_origfilename[1] == ':' &&
3390 !(dir[0] && dir[1] == ':'))
3391 Perl_sv_setpvf(aTHX_ namesv,
3392 "%c:%s\\%s",
3393 PL_origfilename[0],
3394 dir, name);
3395 else
3396 Perl_sv_setpvf(aTHX_ namesv,
3397 "%s\\%s",
3398 dir, name);
3399# else
b640a14a
NC
3400 /* The equivalent of
3401 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
3402 but without the need to parse the format string, or
3403 call strlen on either pointer, and with the correct
3404 allocation up front. */
3405 {
3406 char *tmp = SvGROW(namesv, dirlen + len + 2);
3407
3408 memcpy(tmp, dir, dirlen);
3409 tmp +=dirlen;
3410 *tmp++ = '/';
3411 /* name came from an SV, so it will have a '\0' at the
3412 end that we can copy as part of this memcpy(). */
3413 memcpy(tmp, name, len + 1);
3414
3415 SvCUR_set(namesv, dirlen + len + 1);
3416
3417 /* Don't even actually have to turn SvPOK_on() as we
3418 access it directly with SvPVX() below. */
3419 }
27da23d5
JH
3420# endif
3421# endif
bf4acbe4 3422#endif
bbed91b5 3423 TAINT_PROPER("require");
349d4f2f 3424 tryname = SvPVX_const(namesv);
0786552a 3425 tryrsfp = doopen_pm(tryname, SvCUR(namesv));
bbed91b5
KF
3426 if (tryrsfp) {
3427 if (tryname[0] == '.' && tryname[1] == '/')
3428 tryname += 2;
3429 break;
3430 }
ff806af2
DM
3431 else if (errno == EMFILE)
3432 /* no point in trying other paths if out of handles */
3433 break;
be4b629d 3434 }
46fc3d4c 3435 }
a0d0e21e
LW
3436 }
3437 }
3438 }
f4dd75d9 3439 SAVECOPFILE_FREE(&PL_compiling);