This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Split CXt_LOOP into CXt_LOOP_PLAIN and CXt_LOOP_FOR, eliminating the
[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW
1/* pp_ctl.c
2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
a0d0e21e
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 */
19
166f8a29
DM
20/* This file contains control-oriented pp ("push/pop") functions that
21 * execute the opcodes that make up a perl program. A typical pp function
22 * expects to find its arguments on the stack, and usually pushes its
23 * results onto the stack, hence the 'pp' terminology. Each OP structure
24 * contains a pointer to the relevant pp_foo() function.
25 *
26 * Control-oriented means things like pp_enteriter() and pp_next(), which
27 * alter the flow of control of the program.
28 */
29
30
a0d0e21e 31#include "EXTERN.h"
864dbfa3 32#define PERL_IN_PP_CTL_C
a0d0e21e
LW
33#include "perl.h"
34
35#ifndef WORD_ALIGN
dea28490 36#define WORD_ALIGN sizeof(U32)
a0d0e21e
LW
37#endif
38
54310121 39#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 40
94fcd414
NC
41#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
42
a0d0e21e
LW
43PP(pp_wantarray)
44{
97aff369 45 dVAR;
39644a26 46 dSP;
a0d0e21e
LW
47 I32 cxix;
48 EXTEND(SP, 1);
49
50 cxix = dopoptosub(cxstack_ix);
51 if (cxix < 0)
52 RETPUSHUNDEF;
53
54310121
PP
54 switch (cxstack[cxix].blk_gimme) {
55 case G_ARRAY:
a0d0e21e 56 RETPUSHYES;
54310121 57 case G_SCALAR:
a0d0e21e 58 RETPUSHNO;
54310121
PP
59 default:
60 RETPUSHUNDEF;
61 }
a0d0e21e
LW
62}
63
2cd61cdb
IZ
64PP(pp_regcreset)
65{
97aff369 66 dVAR;
2cd61cdb
IZ
67 /* XXXX Should store the old value to allow for tie/overload - and
68 restore in regcomp, where marked with XXXX. */
3280af22 69 PL_reginterp_cnt = 0;
0b4182de 70 TAINT_NOT;
2cd61cdb
IZ
71 return NORMAL;
72}
73
b3eb6a9b
GS
74PP(pp_regcomp)
75{
97aff369 76 dVAR;
39644a26 77 dSP;
a0d0e21e 78 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 79 SV *tmpstr;
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 */
c5bed6a7 237 if (CxONCE(cx) || !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;
3b719c58
NC
1259 case CXt_LOOP_FOR:
1260 case CXt_LOOP_PLAIN:
a61a7064 1261 if ( !CxLABEL(cx) || strNE(label, CxLABEL(cx)) ) {
cea2e8a9 1262 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
a61a7064 1263 (long)i, CxLABEL(cx)));
a0d0e21e
LW
1264 continue;
1265 }
cea2e8a9 1266 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1267 return i;
1268 }
1269 }
1270 return i;
1271}
1272
0d863452
RH
1273
1274
e50aee73 1275I32
864dbfa3 1276Perl_dowantarray(pTHX)
e50aee73 1277{
97aff369 1278 dVAR;
f54cb97a 1279 const I32 gimme = block_gimme();
54310121
PP
1280 return (gimme == G_VOID) ? G_SCALAR : gimme;
1281}
1282
1283I32
864dbfa3 1284Perl_block_gimme(pTHX)
54310121 1285{
97aff369 1286 dVAR;
06b5626a 1287 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1288 if (cxix < 0)
46fc3d4c 1289 return G_VOID;
e50aee73 1290
54310121 1291 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1292 case G_VOID:
1293 return G_VOID;
54310121 1294 case G_SCALAR:
e50aee73 1295 return G_SCALAR;
54310121
PP
1296 case G_ARRAY:
1297 return G_ARRAY;
1298 default:
cea2e8a9 1299 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1300 /* NOTREACHED */
1301 return 0;
54310121 1302 }
e50aee73
AD
1303}
1304
78f9721b
SM
1305I32
1306Perl_is_lvalue_sub(pTHX)
1307{
97aff369 1308 dVAR;
06b5626a 1309 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1310 assert(cxix >= 0); /* We should only be called from inside subs */
1311
bafb2adc
NC
1312 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1313 return CxLVAL(cxstack + cxix);
78f9721b
SM
1314 else
1315 return 0;
1316}
1317
76e3520e 1318STATIC I32
901017d6 1319S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1320{
97aff369 1321 dVAR;
a0d0e21e 1322 I32 i;
a0d0e21e 1323 for (i = startingblock; i >= 0; i--) {
901017d6 1324 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1325 switch (CxTYPE(cx)) {
a0d0e21e
LW
1326 default:
1327 continue;
1328 case CXt_EVAL:
1329 case CXt_SUB:
7766f137 1330 case CXt_FORMAT:
cea2e8a9 1331 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1332 return i;
1333 }
1334 }
1335 return i;
1336}
1337
76e3520e 1338STATIC I32
cea2e8a9 1339S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1340{
97aff369 1341 dVAR;
a0d0e21e 1342 I32 i;
a0d0e21e 1343 for (i = startingblock; i >= 0; i--) {
06b5626a 1344 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1345 switch (CxTYPE(cx)) {
a0d0e21e
LW
1346 default:
1347 continue;
1348 case CXt_EVAL:
cea2e8a9 1349 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1350 return i;
1351 }
1352 }
1353 return i;
1354}
1355
76e3520e 1356STATIC I32
cea2e8a9 1357S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1358{
97aff369 1359 dVAR;
a0d0e21e 1360 I32 i;
a0d0e21e 1361 for (i = startingblock; i >= 0; i--) {
901017d6 1362 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1363 switch (CxTYPE(cx)) {
a0d0e21e 1364 case CXt_SUBST:
a0d0e21e 1365 case CXt_SUB:
7766f137 1366 case CXt_FORMAT:
a0d0e21e 1367 case CXt_EVAL:
0a753a76 1368 case CXt_NULL:
e476b1b5 1369 if (ckWARN(WARN_EXITING))
515afda2
NC
1370 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1371 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1372 if ((CxTYPE(cx)) == CXt_NULL)
1373 return -1;
1374 break;
3b719c58
NC
1375 case CXt_LOOP_FOR:
1376 case CXt_LOOP_PLAIN:
cea2e8a9 1377 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1378 return i;
1379 }
1380 }
1381 return i;
1382}
1383
0d863452
RH
1384STATIC I32
1385S_dopoptogiven(pTHX_ I32 startingblock)
1386{
97aff369 1387 dVAR;
0d863452
RH
1388 I32 i;
1389 for (i = startingblock; i >= 0; i--) {
1390 register const PERL_CONTEXT *cx = &cxstack[i];
1391 switch (CxTYPE(cx)) {
1392 default:
1393 continue;
1394 case CXt_GIVEN:
1395 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1396 return i;
3b719c58
NC
1397 case CXt_LOOP_PLAIN:
1398 assert(!CxFOREACHDEF(cx));
1399 break;
1400 case CXt_LOOP_FOR:
0d863452
RH
1401 if (CxFOREACHDEF(cx)) {
1402 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1403 return i;
1404 }
1405 }
1406 }
1407 return i;
1408}
1409
1410STATIC I32
1411S_dopoptowhen(pTHX_ I32 startingblock)
1412{
97aff369 1413 dVAR;
0d863452
RH
1414 I32 i;
1415 for (i = startingblock; i >= 0; i--) {
1416 register const PERL_CONTEXT *cx = &cxstack[i];
1417 switch (CxTYPE(cx)) {
1418 default:
1419 continue;
1420 case CXt_WHEN:
1421 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1422 return i;
1423 }
1424 }
1425 return i;
1426}
1427
a0d0e21e 1428void
864dbfa3 1429Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1430{
97aff369 1431 dVAR;
a0d0e21e
LW
1432 I32 optype;
1433
1434 while (cxstack_ix > cxix) {
b0d9ce38 1435 SV *sv;
06b5626a 1436 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1437 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1438 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1439 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1440 switch (CxTYPE(cx)) {
c90c0ff4
PP
1441 case CXt_SUBST:
1442 POPSUBST(cx);
1443 continue; /* not break */
a0d0e21e 1444 case CXt_SUB:
b0d9ce38
GS
1445 POPSUB(cx,sv);
1446 LEAVESUB(sv);
a0d0e21e
LW
1447 break;
1448 case CXt_EVAL:
1449 POPEVAL(cx);
1450 break;
3b719c58
NC
1451 case CXt_LOOP_FOR:
1452 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1453 POPLOOP(cx);
1454 break;
0a753a76 1455 case CXt_NULL:
a0d0e21e 1456 break;
7766f137
GS
1457 case CXt_FORMAT:
1458 POPFORMAT(cx);
1459 break;
a0d0e21e 1460 }
c90c0ff4 1461 cxstack_ix--;
a0d0e21e 1462 }
1b6737cc 1463 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1464}
1465
5a844595
GS
1466void
1467Perl_qerror(pTHX_ SV *err)
1468{
97aff369 1469 dVAR;
5a844595
GS
1470 if (PL_in_eval)
1471 sv_catsv(ERRSV, err);
1472 else if (PL_errors)
1473 sv_catsv(PL_errors, err);
1474 else
be2597df 1475 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1476 if (PL_parser)
1477 ++PL_parser->error_count;
5a844595
GS
1478}
1479
a0d0e21e 1480OP *
35a4481c 1481Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1482{
27da23d5 1483 dVAR;
87582a92 1484
3280af22 1485 if (PL_in_eval) {
a0d0e21e 1486 I32 cxix;
a0d0e21e 1487 I32 gimme;
a0d0e21e 1488
4e6ea2c3 1489 if (message) {
faef0170 1490 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1491 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1492 SV * const err = ERRSV;
c445ea15 1493 const char *e = NULL;
98eae8f5 1494 if (!SvPOK(err))
c69006e4 1495 sv_setpvn(err,"",0);
98eae8f5 1496 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1497 STRLEN len;
349d4f2f 1498 e = SvPV_const(err, len);
0510663f 1499 e += len - msglen;
98eae8f5 1500 if (*e != *message || strNE(e,message))
c445ea15 1501 e = NULL;
98eae8f5
GS
1502 }
1503 if (!e) {
1504 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1505 sv_catpvn(err, prefix, sizeof(prefix)-1);
1506 sv_catpvn(err, message, msglen);
e476b1b5 1507 if (ckWARN(WARN_MISC)) {
504618e9 1508 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1509 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1510 }
4633a7c4 1511 }
4633a7c4 1512 }
1aa99e6b 1513 else {
06bf62c7 1514 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1515 }
4633a7c4 1516 }
4e6ea2c3 1517
5a844595
GS
1518 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1519 && PL_curstackinfo->si_prev)
1520 {
bac4b2ad 1521 dounwind(-1);
d3acc0f7 1522 POPSTACK;
bac4b2ad 1523 }
e336de0d 1524
a0d0e21e
LW
1525 if (cxix >= 0) {
1526 I32 optype;
35a4481c 1527 register PERL_CONTEXT *cx;
901017d6 1528 SV **newsp;
a0d0e21e
LW
1529
1530 if (cxix < cxstack_ix)
1531 dounwind(cxix);
1532
3280af22 1533 POPBLOCK(cx,PL_curpm);
6b35e009 1534 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1535 if (!message)
349d4f2f 1536 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1537 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1538 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1539 my_exit(1);
1540 }
1541 POPEVAL(cx);
1542
1543 if (gimme == G_SCALAR)
3280af22
NIS
1544 *++newsp = &PL_sv_undef;
1545 PL_stack_sp = newsp;
a0d0e21e
LW
1546
1547 LEAVE;
748a9306 1548
7fb6a879
GS
1549 /* LEAVE could clobber PL_curcop (see save_re_context())
1550 * XXX it might be better to find a way to avoid messing with
1551 * PL_curcop in save_re_context() instead, but this is a more
1552 * minimal fix --GSAR */
1553 PL_curcop = cx->blk_oldcop;
1554
7a2e2cd6 1555 if (optype == OP_REQUIRE) {
44f8325f 1556 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1557 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1558 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1559 &PL_sv_undef, 0);
5a844595
GS
1560 DIE(aTHX_ "%sCompilation failed in require",
1561 *msg ? msg : "Unknown error\n");
7a2e2cd6 1562 }
f39bc417
DM
1563 assert(CxTYPE(cx) == CXt_EVAL);
1564 return cx->blk_eval.retop;
a0d0e21e
LW
1565 }
1566 }
9cc2fdd3 1567 if (!message)
349d4f2f 1568 message = SvPVx_const(ERRSV, msglen);
87582a92 1569
7ff03255 1570 write_to_stderr(message, msglen);
f86702cc
PP
1571 my_failure_exit();
1572 /* NOTREACHED */
a0d0e21e
LW
1573 return 0;
1574}
1575
1576PP(pp_xor)
1577{
97aff369 1578 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1579 if (SvTRUE(left) != SvTRUE(right))
1580 RETSETYES;
1581 else
1582 RETSETNO;
1583}
1584
a0d0e21e
LW
1585PP(pp_caller)
1586{
97aff369 1587 dVAR;
39644a26 1588 dSP;
a0d0e21e 1589 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1590 register const PERL_CONTEXT *cx;
1591 register const PERL_CONTEXT *ccstack = cxstack;
1592 const PERL_SI *top_si = PL_curstackinfo;
54310121 1593 I32 gimme;
06b5626a 1594 const char *stashname;
a0d0e21e
LW
1595 I32 count = 0;
1596
1597 if (MAXARG)
1598 count = POPi;
27d41816 1599
a0d0e21e 1600 for (;;) {
2c375eb9
GS
1601 /* we may be in a higher stacklevel, so dig down deeper */
1602 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1603 top_si = top_si->si_prev;
1604 ccstack = top_si->si_cxstack;
1605 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1606 }
a0d0e21e 1607 if (cxix < 0) {
27d41816
DM
1608 if (GIMME != G_ARRAY) {
1609 EXTEND(SP, 1);
a0d0e21e 1610 RETPUSHUNDEF;
27d41816 1611 }
a0d0e21e
LW
1612 RETURN;
1613 }
f2a7f298 1614 /* caller() should not report the automatic calls to &DB::sub */
1615 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1616 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1617 count++;
1618 if (!count--)
1619 break;
2c375eb9 1620 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1621 }
2c375eb9
GS
1622
1623 cx = &ccstack[cxix];
7766f137 1624 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1625 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1626 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1627 field below is defined for any cx. */
f2a7f298 1628 /* caller() should not report the automatic calls to &DB::sub */
1629 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1630 cx = &ccstack[dbcxix];
06a5b730
PP
1631 }
1632
ed094faf 1633 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1634 if (GIMME != G_ARRAY) {
27d41816 1635 EXTEND(SP, 1);
ed094faf 1636 if (!stashname)
3280af22 1637 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1638 else {
1639 dTARGET;
ed094faf 1640 sv_setpv(TARG, stashname);
49d8d3a1
MB
1641 PUSHs(TARG);
1642 }
a0d0e21e
LW
1643 RETURN;
1644 }
a0d0e21e 1645
b3ca2e83 1646 EXTEND(SP, 11);
27d41816 1647
ed094faf 1648 if (!stashname)
3280af22 1649 PUSHs(&PL_sv_undef);
49d8d3a1 1650 else
6e449a3a
MHM
1651 mPUSHs(newSVpv(stashname, 0));
1652 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1653 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW
1654 if (!MAXARG)
1655 RETURN;
7766f137 1656 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1657 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1658 /* So is ccstack[dbcxix]. */
07b8c804 1659 if (isGV(cvgv)) {
561b68a9 1660 SV * const sv = newSV(0);
c445ea15 1661 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1662 mPUSHs(sv);
bf38a478 1663 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1664 }
1665 else {
84bafc02 1666 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1667 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1668 }
a0d0e21e
LW
1669 }
1670 else {
84bafc02 1671 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1672 mPUSHi(0);
a0d0e21e 1673 }
54310121
PP
1674 gimme = (I32)cx->blk_gimme;
1675 if (gimme == G_VOID)
3280af22 1676 PUSHs(&PL_sv_undef);
54310121 1677 else
98625aca 1678 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1679 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1680 /* eval STRING */
85a64632 1681 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1682 PUSHs(cx->blk_eval.cur_text);
3280af22 1683 PUSHs(&PL_sv_no);
0f79a09d 1684 }
811a4de9 1685 /* require */
0f79a09d 1686 else if (cx->blk_eval.old_namesv) {
6e449a3a 1687 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1688 PUSHs(&PL_sv_yes);
06a5b730 1689 }
811a4de9
GS
1690 /* eval BLOCK (try blocks have old_namesv == 0) */
1691 else {
1692 PUSHs(&PL_sv_undef);
1693 PUSHs(&PL_sv_undef);
1694 }
4633a7c4 1695 }
a682de96
GS
1696 else {
1697 PUSHs(&PL_sv_undef);
1698 PUSHs(&PL_sv_undef);
1699 }
bafb2adc 1700 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1701 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1702 {
66a1b24b
AL
1703 AV * const ary = cx->blk_sub.argarray;
1704 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1705
3280af22 1706 if (!PL_dbargs) {
71315bf2 1707 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1708 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1709 GvMULTI_on(tmpgv);
3ddcf04c 1710 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1711 }
1712
3280af22
NIS
1713 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1714 av_extend(PL_dbargs, AvFILLp(ary) + off);
1715 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1716 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1717 }
f3aa04c2
GS
1718 /* XXX only hints propagated via op_private are currently
1719 * visible (others are not easily accessible, since they
1720 * use the global PL_hints) */
6e449a3a 1721 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1722 {
1723 SV * mask ;
72dc9ed5 1724 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1725
ac27b0f5 1726 if (old_warnings == pWARN_NONE ||
114bafba 1727 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1728 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1729 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1730 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1731 /* Get the bit mask for $warnings::Bits{all}, because
1732 * it could have been extended by warnings::register */
1733 SV **bits_all;
0bd48802 1734 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1735 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1736 mask = newSVsv(*bits_all);
1737 }
1738 else {
1739 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1740 }
1741 }
e476b1b5 1742 else
72dc9ed5 1743 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1744 mPUSHs(mask);
e476b1b5 1745 }
b3ca2e83 1746
c28fe1ec 1747 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1748 sv_2mortal(newRV_noinc(
c28fe1ec
NC
1749 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1750 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1751 : &PL_sv_undef);
a0d0e21e
LW
1752 RETURN;
1753}
1754
a0d0e21e
LW
1755PP(pp_reset)
1756{
97aff369 1757 dVAR;
39644a26 1758 dSP;
10edeb5d 1759 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1760 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1761 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1762 RETURN;
1763}
1764
dd2155a4
DM
1765/* like pp_nextstate, but used instead when the debugger is active */
1766
a0d0e21e
LW
1767PP(pp_dbstate)
1768{
27da23d5 1769 dVAR;
533c011a 1770 PL_curcop = (COP*)PL_op;
a0d0e21e 1771 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1772 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1773 FREETMPS;
1774
5df8de69
DM
1775 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1776 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1777 {
39644a26 1778 dSP;
c09156bb 1779 register PERL_CONTEXT *cx;
f54cb97a 1780 const I32 gimme = G_ARRAY;
eb160463 1781 U8 hasargs;
0bd48802
AL
1782 GV * const gv = PL_DBgv;
1783 register CV * const cv = GvCV(gv);
a0d0e21e 1784
a0d0e21e 1785 if (!cv)
cea2e8a9 1786 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1787
aea4f609
DM
1788 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1789 /* don't do recursive DB::DB call */
a0d0e21e 1790 return NORMAL;
748a9306 1791
4633a7c4
LW
1792 ENTER;
1793 SAVETMPS;
1794
3280af22 1795 SAVEI32(PL_debug);
55497cff 1796 SAVESTACK_POS();
3280af22 1797 PL_debug = 0;
748a9306 1798 hasargs = 0;
924508f0 1799 SPAGAIN;
748a9306 1800
aed2304a 1801 if (CvISXSUB(cv)) {
c127bd3a
SF
1802 CvDEPTH(cv)++;
1803 PUSHMARK(SP);
1804 (void)(*CvXSUB(cv))(aTHX_ cv);
1805 CvDEPTH(cv)--;
1806 FREETMPS;
1807 LEAVE;
1808 return NORMAL;
1809 }
1810 else {
1811 PUSHBLOCK(cx, CXt_SUB, SP);
1812 PUSHSUB_DB(cx);
1813 cx->blk_sub.retop = PL_op->op_next;
1814 CvDEPTH(cv)++;
1815 SAVECOMPPAD();
1816 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1817 RETURNOP(CvSTART(cv));
1818 }
a0d0e21e
LW
1819 }
1820 else
1821 return NORMAL;
1822}
1823
a0d0e21e
LW
1824PP(pp_enteriter)
1825{
27da23d5 1826 dVAR; dSP; dMARK;
c09156bb 1827 register PERL_CONTEXT *cx;
f54cb97a 1828 const I32 gimme = GIMME_V;
a0d0e21e 1829 SV **svp;
3b719c58 1830 U16 cxtype = CXt_LOOP_FOR;
7766f137
GS
1831#ifdef USE_ITHREADS
1832 void *iterdata;
1833#endif
a0d0e21e 1834
4633a7c4
LW
1835 ENTER;
1836 SAVETMPS;
1837
533c011a 1838 if (PL_op->op_targ) {
14f338dc
DM
1839 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1840 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1841 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1842 SVs_PADSTALE, SVs_PADSTALE);
1843 }
c3564e5c 1844#ifndef USE_ITHREADS
dd2155a4 1845 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
54b9620d 1846 SAVESPTR(*svp);
c3564e5c
GS
1847#else
1848 SAVEPADSV(PL_op->op_targ);
cbfa9890 1849 iterdata = INT2PTR(void*, PL_op->op_targ);
7766f137
GS
1850 cxtype |= CXp_PADVAR;
1851#endif
54b9620d
MB
1852 }
1853 else {
0bd48802 1854 GV * const gv = (GV*)POPs;
7766f137 1855 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1856 SAVEGENERICSV(*svp);
561b68a9 1857 *svp = newSV(0);
7766f137
GS
1858#ifdef USE_ITHREADS
1859 iterdata = (void*)gv;
1860#endif
54b9620d 1861 }
4633a7c4 1862
0d863452
RH
1863 if (PL_op->op_private & OPpITER_DEF)
1864 cxtype |= CXp_FOR_DEF;
1865
a0d0e21e
LW
1866 ENTER;
1867
7766f137
GS
1868 PUSHBLOCK(cx, cxtype, SP);
1869#ifdef USE_ITHREADS
3b719c58 1870 PUSHLOOP_FOR(cx, iterdata, MARK);
7766f137 1871#else
3b719c58 1872 PUSHLOOP_FOR(cx, svp, MARK);
7766f137 1873#endif
533c011a 1874 if (PL_op->op_flags & OPf_STACKED) {
44a8e56a 1875 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
89ea2908
GA
1876 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1877 dPOPss;
0bd48802 1878 SV * const right = (SV*)cx->blk_loop.iterary;
984a4bea
RD
1879 SvGETMAGIC(sv);
1880 SvGETMAGIC(right);
4fe3f0fa 1881 if (RANGE_IS_NUMERIC(sv,right)) {
a2309040
JH
1882#ifdef NV_PRESERVES_UV
1883 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1884 (SvNV(sv) > (NV)IV_MAX)))
1885 ||
1886 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1887 (SvNV(right) < (NV)IV_MIN))))
1888#else
1889 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1890 ||
1891 ((SvNV(sv) > 0) &&
1892 ((SvUV(sv) > (UV)IV_MAX) ||
1893 (SvNV(sv) > (NV)UV_MAX)))))
1894 ||
1895 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1896 ||
1897 ((SvNV(right) > 0) &&
1898 ((SvUV(right) > (UV)IV_MAX) ||
1899 (SvNV(right) > (NV)UV_MAX))))))
1900#endif
076d9a11
MHM
1901 DIE(aTHX_ "Range iterator outside integer range");
1902 cx->blk_loop.iterix = SvIV(sv);
4fe3f0fa 1903 cx->blk_loop.itermax = SvIV(right);
d4665a05
DM
1904#ifdef DEBUGGING
1905 /* for correct -Dstv display */
1906 cx->blk_oldsp = sp - PL_stack_base;
1907#endif
89ea2908 1908 }
3f63a782 1909 else {
89ea2908 1910 cx->blk_loop.iterlval = newSVsv(sv);
13c5b33c 1911 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
10516c54 1912 (void) SvPV_nolen_const(right);
3f63a782 1913 }
89ea2908 1914 }
ef3e5ea9 1915 else if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1916 cx->blk_loop.itermax = 0;
1917 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary) + 1;
ef3e5ea9
NC
1918
1919 }
89ea2908 1920 }
4633a7c4 1921 else {
3280af22 1922 cx->blk_loop.iterary = PL_curstack;
ef3e5ea9 1923 if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1924 cx->blk_loop.itermax = MARK - PL_stack_base + 1;
1925 cx->blk_loop.iterix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1926 }
1927 else {
1928 cx->blk_loop.iterix = MARK - PL_stack_base;
1929 }
4633a7c4 1930 }
a0d0e21e
LW
1931
1932 RETURN;
1933}
1934
1935PP(pp_enterloop)
1936{
27da23d5 1937 dVAR; dSP;
c09156bb 1938 register PERL_CONTEXT *cx;
f54cb97a 1939 const I32 gimme = GIMME_V;
a0d0e21e
LW
1940
1941 ENTER;
1942 SAVETMPS;
1943 ENTER;
1944
3b719c58
NC
1945 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
1946 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
1947
1948 RETURN;
1949}
1950
1951PP(pp_leaveloop)
1952{
27da23d5 1953 dVAR; dSP;
c09156bb 1954 register PERL_CONTEXT *cx;
a0d0e21e
LW
1955 I32 gimme;
1956 SV **newsp;
1957 PMOP *newpm;
1958 SV **mark;
1959
1960 POPBLOCK(cx,newpm);
3b719c58 1961 assert(CxTYPE_is_LOOP(cx));
4fdae800 1962 mark = newsp;
a8bba7fa 1963 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1964
a1f49e72 1965 TAINT_NOT;
54310121 1966 if (gimme == G_VOID)
6f207bd3 1967 NOOP;
54310121
PP
1968 else if (gimme == G_SCALAR) {
1969 if (mark < SP)
1970 *++newsp = sv_mortalcopy(*SP);
1971 else
3280af22 1972 *++newsp = &PL_sv_undef;
a0d0e21e
LW
1973 }
1974 else {
a1f49e72 1975 while (mark < SP) {
a0d0e21e 1976 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
1977 TAINT_NOT; /* Each item is independent */
1978 }
a0d0e21e 1979 }
f86702cc
PP
1980 SP = newsp;
1981 PUTBACK;
1982
a8bba7fa 1983 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 1984 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 1985
a0d0e21e
LW
1986 LEAVE;
1987 LEAVE;
1988
f86702cc 1989 return NORMAL;
a0d0e21e
LW
1990}
1991
1992PP(pp_return)
1993{
27da23d5 1994 dVAR; dSP; dMARK;
c09156bb 1995 register PERL_CONTEXT *cx;
f86702cc 1996 bool popsub2 = FALSE;
b45de488 1997 bool clear_errsv = FALSE;
a0d0e21e
LW
1998 I32 gimme;
1999 SV **newsp;
2000 PMOP *newpm;
2001 I32 optype = 0;
b0d9ce38 2002 SV *sv;
f39bc417 2003 OP *retop;
a0d0e21e 2004
0bd48802
AL
2005 const I32 cxix = dopoptosub(cxstack_ix);
2006
9850bf21
RH
2007 if (cxix < 0) {
2008 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2009 * sort block, which is a CXt_NULL
2010 * not a CXt_SUB */
2011 dounwind(0);
d7507f74
RH
2012 PL_stack_base[1] = *PL_stack_sp;
2013 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2014 return 0;
2015 }
9850bf21
RH
2016 else
2017 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2018 }
a0d0e21e
LW
2019 if (cxix < cxstack_ix)
2020 dounwind(cxix);
2021
d7507f74
RH
2022 if (CxMULTICALL(&cxstack[cxix])) {
2023 gimme = cxstack[cxix].blk_gimme;
2024 if (gimme == G_VOID)
2025 PL_stack_sp = PL_stack_base;
2026 else if (gimme == G_SCALAR) {
2027 PL_stack_base[1] = *PL_stack_sp;
2028 PL_stack_sp = PL_stack_base + 1;
2029 }
9850bf21 2030 return 0;
d7507f74 2031 }
9850bf21 2032
a0d0e21e 2033 POPBLOCK(cx,newpm);
6b35e009 2034 switch (CxTYPE(cx)) {
a0d0e21e 2035 case CXt_SUB:
f86702cc 2036 popsub2 = TRUE;
f39bc417 2037 retop = cx->blk_sub.retop;
5dd42e15 2038 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2039 break;
2040 case CXt_EVAL:
b45de488
GS
2041 if (!(PL_in_eval & EVAL_KEEPERR))
2042 clear_errsv = TRUE;
a0d0e21e 2043 POPEVAL(cx);
f39bc417 2044 retop = cx->blk_eval.retop;
1d76a5c3
GS
2045 if (CxTRYBLOCK(cx))
2046 break;
067f92a0 2047 lex_end();
748a9306
LW
2048 if (optype == OP_REQUIRE &&
2049 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2050 {
54310121 2051 /* Unassume the success we assumed earlier. */
901017d6 2052 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2053 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2054 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2055 }
a0d0e21e 2056 break;
7766f137
GS
2057 case CXt_FORMAT:
2058 POPFORMAT(cx);
f39bc417 2059 retop = cx->blk_sub.retop;
7766f137 2060 break;
a0d0e21e 2061 default:
cea2e8a9 2062 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2063 }
2064
a1f49e72 2065 TAINT_NOT;
a0d0e21e 2066 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2067 if (MARK < SP) {
2068 if (popsub2) {
a8bba7fa 2069 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2070 if (SvTEMP(TOPs)) {
2071 *++newsp = SvREFCNT_inc(*SP);
2072 FREETMPS;
2073 sv_2mortal(*newsp);
959e3673
GS
2074 }
2075 else {
2076 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2077 FREETMPS;
959e3673
GS
2078 *++newsp = sv_mortalcopy(sv);
2079 SvREFCNT_dec(sv);
a29cdaf0 2080 }
959e3673
GS
2081 }
2082 else
a29cdaf0 2083 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2084 }
2085 else
a29cdaf0 2086 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2087 }
2088 else
3280af22 2089 *++newsp = &PL_sv_undef;
a0d0e21e 2090 }
54310121 2091 else if (gimme == G_ARRAY) {
a1f49e72 2092 while (++MARK <= SP) {
f86702cc
PP
2093 *++newsp = (popsub2 && SvTEMP(*MARK))
2094 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2095 TAINT_NOT; /* Each item is independent */
2096 }
a0d0e21e 2097 }
3280af22 2098 PL_stack_sp = newsp;
a0d0e21e 2099
5dd42e15 2100 LEAVE;
f86702cc
PP
2101 /* Stack values are safe: */
2102 if (popsub2) {
5dd42e15 2103 cxstack_ix--;
b0d9ce38 2104 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2105 }
b0d9ce38 2106 else
c445ea15 2107 sv = NULL;
3280af22 2108 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2109
b0d9ce38 2110 LEAVESUB(sv);
b45de488 2111 if (clear_errsv)
c69006e4 2112 sv_setpvn(ERRSV,"",0);
f39bc417 2113 return retop;
a0d0e21e
LW
2114}
2115
2116PP(pp_last)
2117{
27da23d5 2118 dVAR; dSP;
a0d0e21e 2119 I32 cxix;
c09156bb 2120 register PERL_CONTEXT *cx;
f86702cc 2121 I32 pop2 = 0;
a0d0e21e 2122 I32 gimme;
8772537c 2123 I32 optype;
a0d0e21e
LW
2124 OP *nextop;
2125 SV **newsp;
2126 PMOP *newpm;
a8bba7fa 2127 SV **mark;
c445ea15 2128 SV *sv = NULL;
9d4ba2ae 2129
a0d0e21e 2130
533c011a 2131 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2132 cxix = dopoptoloop(cxstack_ix);
2133 if (cxix < 0)
a651a37d 2134 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2135 }
2136 else {
2137 cxix = dopoptolabel(cPVOP->op_pv);
2138 if (cxix < 0)
cea2e8a9 2139 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2140 }
2141 if (cxix < cxstack_ix)
2142 dounwind(cxix);
2143
2144 POPBLOCK(cx,newpm);
5dd42e15 2145 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2146 mark = newsp;
6b35e009 2147 switch (CxTYPE(cx)) {
3b719c58
NC
2148 case CXt_LOOP_FOR:
2149 case CXt_LOOP_PLAIN:
2150 pop2 = CxTYPE(cx);
a8bba7fa 2151 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2152 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2153 break;
f86702cc 2154 case CXt_SUB:
f86702cc 2155 pop2 = CXt_SUB;
f39bc417 2156 nextop = cx->blk_sub.retop;
a0d0e21e 2157 break;
f86702cc
PP
2158 case CXt_EVAL:
2159 POPEVAL(cx);
f39bc417 2160 nextop = cx->blk_eval.retop;
a0d0e21e 2161 break;
7766f137
GS
2162 case CXt_FORMAT:
2163 POPFORMAT(cx);
f39bc417 2164 nextop = cx->blk_sub.retop;
7766f137 2165 break;
a0d0e21e 2166 default:
cea2e8a9 2167 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2168 }
2169
a1f49e72 2170 TAINT_NOT;
a0d0e21e 2171 if (gimme == G_SCALAR) {
f86702cc
PP
2172 if (MARK < SP)
2173 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2174 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2175 else
3280af22 2176 *++newsp = &PL_sv_undef;
a0d0e21e 2177 }
54310121 2178 else if (gimme == G_ARRAY) {
a1f49e72 2179 while (++MARK <= SP) {
f86702cc
PP
2180 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2181 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2182 TAINT_NOT; /* Each item is independent */
2183 }
f86702cc
PP
2184 }
2185 SP = newsp;
2186 PUTBACK;
2187
5dd42e15
DM
2188 LEAVE;
2189 cxstack_ix--;
f86702cc
PP
2190 /* Stack values are safe: */
2191 switch (pop2) {
3b719c58
NC
2192 case CXt_LOOP_PLAIN:
2193 case CXt_LOOP_FOR:
a8bba7fa 2194 POPLOOP(cx); /* release loop vars ... */
4fdae800 2195 LEAVE;
f86702cc
PP
2196 break;
2197 case CXt_SUB:
b0d9ce38 2198 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2199 break;
a0d0e21e 2200 }
3280af22 2201 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2202
b0d9ce38 2203 LEAVESUB(sv);
9d4ba2ae
AL
2204 PERL_UNUSED_VAR(optype);
2205 PERL_UNUSED_VAR(gimme);
f86702cc 2206 return nextop;
a0d0e21e
LW
2207}
2208
2209PP(pp_next)
2210{
27da23d5 2211 dVAR;
a0d0e21e 2212 I32 cxix;
c09156bb 2213 register PERL_CONTEXT *cx;
85538317 2214 I32 inner;
a0d0e21e 2215
533c011a 2216 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2217 cxix = dopoptoloop(cxstack_ix);
2218 if (cxix < 0)
a651a37d 2219 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2220 }
2221 else {
2222 cxix = dopoptolabel(cPVOP->op_pv);
2223 if (cxix < 0)
cea2e8a9 2224 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2225 }
2226 if (cxix < cxstack_ix)
2227 dounwind(cxix);
2228
85538317
GS
2229 /* clear off anything above the scope we're re-entering, but
2230 * save the rest until after a possible continue block */
2231 inner = PL_scopestack_ix;
1ba6ee2b 2232 TOPBLOCK(cx);
85538317
GS
2233 if (PL_scopestack_ix < inner)
2234 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2235 PL_curcop = cx->blk_oldcop;
022eaa24 2236 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2237}
2238
2239PP(pp_redo)
2240{
27da23d5 2241 dVAR;
a0d0e21e 2242 I32 cxix;
c09156bb 2243 register PERL_CONTEXT *cx;
a0d0e21e 2244 I32 oldsave;
a034e688 2245 OP* redo_op;
a0d0e21e 2246
533c011a 2247 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2248 cxix = dopoptoloop(cxstack_ix);
2249 if (cxix < 0)
a651a37d 2250 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2251 }
2252 else {
2253 cxix = dopoptolabel(cPVOP->op_pv);
2254 if (cxix < 0)
cea2e8a9 2255 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2256 }
2257 if (cxix < cxstack_ix)
2258 dounwind(cxix);
2259
022eaa24 2260 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2261 if (redo_op->op_type == OP_ENTER) {
2262 /* pop one less context to avoid $x being freed in while (my $x..) */
2263 cxstack_ix++;
2264 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2265 redo_op = redo_op->op_next;
2266 }
2267
a0d0e21e 2268 TOPBLOCK(cx);
3280af22 2269 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2270 LEAVE_SCOPE(oldsave);
936c78b5 2271 FREETMPS;
3a1b2b9e 2272 PL_curcop = cx->blk_oldcop;
a034e688 2273 return redo_op;
a0d0e21e
LW
2274}
2275
0824fdcb 2276STATIC OP *
bfed75c6 2277S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2278{
97aff369 2279 dVAR;
a0d0e21e 2280 OP **ops = opstack;
bfed75c6 2281 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2282
fc36a67e 2283 if (ops >= oplimit)
cea2e8a9 2284 Perl_croak(aTHX_ too_deep);
11343788
MB
2285 if (o->op_type == OP_LEAVE ||
2286 o->op_type == OP_SCOPE ||
2287 o->op_type == OP_LEAVELOOP ||
33d34e4c 2288 o->op_type == OP_LEAVESUB ||
11343788 2289 o->op_type == OP_LEAVETRY)
fc36a67e 2290 {
5dc0d613 2291 *ops++ = cUNOPo->op_first;
fc36a67e 2292 if (ops >= oplimit)
cea2e8a9 2293 Perl_croak(aTHX_ too_deep);
fc36a67e 2294 }
c4aa4e48 2295 *ops = 0;
11343788 2296 if (o->op_flags & OPf_KIDS) {
aec46f14 2297 OP *kid;
a0d0e21e 2298 /* First try all the kids at this level, since that's likeliest. */
11343788 2299 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS
2300 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2301 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW
2302 return kid;
2303 }
11343788 2304 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2305 if (kid == PL_lastgotoprobe)
a0d0e21e 2306 continue;
ed8d0fe2
SM
2307 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2308 if (ops == opstack)
2309 *ops++ = kid;
2310 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2311 ops[-1]->op_type == OP_DBSTATE)
2312 ops[-1] = kid;
2313 else
2314 *ops++ = kid;
2315 }
155aba94 2316 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2317 return o;
a0d0e21e
LW
2318 }
2319 }
c4aa4e48 2320 *ops = 0;
a0d0e21e
LW
2321 return 0;
2322}
2323
a0d0e21e
LW
2324PP(pp_goto)
2325{
27da23d5 2326 dVAR; dSP;
cbbf8932 2327 OP *retop = NULL;
a0d0e21e 2328 I32 ix;
c09156bb 2329 register PERL_CONTEXT *cx;
fc36a67e
PP
2330#define GOTO_DEPTH 64
2331 OP *enterops[GOTO_DEPTH];
cbbf8932 2332 const char *label = NULL;
bfed75c6
AL
2333 const bool do_dump = (PL_op->op_type == OP_DUMP);
2334 static const char must_have_label[] = "goto must have label";
a0d0e21e 2335
533c011a 2336 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2337 SV * const sv = POPs;
a0d0e21e
LW
2338
2339 /* This egregious kludge implements goto &subroutine */
2340 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2341 I32 cxix;
c09156bb 2342 register PERL_CONTEXT *cx;
a0d0e21e
LW
2343 CV* cv = (CV*)SvRV(sv);
2344 SV** mark;
2345 I32 items = 0;
2346 I32 oldsave;
b1464ded 2347 bool reified = 0;
a0d0e21e 2348
e8f7dd13 2349 retry:
4aa0a1f7 2350 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2351 const GV * const gv = CvGV(cv);
e8f7dd13 2352 if (gv) {
7fc63493 2353 GV *autogv;
e8f7dd13
GS
2354 SV *tmpstr;
2355 /* autoloaded stub? */
2356 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2357 goto retry;
2358 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2359 GvNAMELEN(gv), FALSE);
2360 if (autogv && (cv = GvCV(autogv)))
2361 goto retry;
2362 tmpstr = sv_newmortal();
c445ea15 2363 gv_efullname3(tmpstr, gv, NULL);
be2597df 2364 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2365 }
cea2e8a9 2366 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2367 }
2368
a0d0e21e 2369 /* First do some returnish stuff. */
b37c2d43 2370 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2371 FREETMPS;
a0d0e21e
LW
2372 cxix = dopoptosub(cxstack_ix);
2373 if (cxix < 0)
cea2e8a9 2374 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2375 if (cxix < cxstack_ix)
2376 dounwind(cxix);
2377 TOPBLOCK(cx);
2d43a17f 2378 SPAGAIN;
564abe23 2379 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2380 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2381 if (CxREALEVAL(cx))
2382 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2383 else
2384 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2385 }
9850bf21
RH
2386 else if (CxMULTICALL(cx))
2387 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2388 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2389 /* put @_ back onto stack */
a0d0e21e 2390 AV* av = cx->blk_sub.argarray;
bfed75c6 2391
93965878 2392 items = AvFILLp(av) + 1;
a45cdc79
DM
2393 EXTEND(SP, items+1); /* @_ could have been extended. */
2394 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2395 SvREFCNT_dec(GvAV(PL_defgv));
2396 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2397 CLEAR_ARGARRAY(av);
d8b46c1b 2398 /* abandon @_ if it got reified */
62b1ebc2 2399 if (AvREAL(av)) {
b1464ded
DM
2400 reified = 1;
2401 SvREFCNT_dec(av);
d8b46c1b
GS
2402 av = newAV();
2403 av_extend(av, items-1);
11ca45c0 2404 AvREIFY_only(av);
dd2155a4 2405 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2406 }
a0d0e21e 2407 }
aed2304a 2408 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2409 AV* const av = GvAV(PL_defgv);
1fa4e549 2410 items = AvFILLp(av) + 1;
a45cdc79
DM
2411 EXTEND(SP, items+1); /* @_ could have been extended. */
2412 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2413 }
a45cdc79
DM
2414 mark = SP;
2415 SP += items;
6b35e009 2416 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2417 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2418 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2419 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2420 LEAVE_SCOPE(oldsave);
2421
2422 /* Now do some callish stuff. */
2423 SAVETMPS;
5023d17a 2424 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2425 if (CvISXSUB(cv)) {
b37c2d43 2426 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2427 SV **newsp;
2428 I32 gimme;
b1464ded
DM
2429 if (reified) {
2430 I32 index;
2431 for (index=0; index<items; index++)
2432 sv_2mortal(SP[-index]);
2433 }
1fa4e549 2434
b37c2d43
AL
2435 /* XS subs don't have a CxSUB, so pop it */
2436 POPBLOCK(cx, PL_curpm);
2437 /* Push a mark for the start of arglist */
2438 PUSHMARK(mark);
2439 PUTBACK;
2440 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2441 LEAVE;
5eff7df7 2442 return retop;
a0d0e21e
LW
2443 }
2444 else {
b37c2d43 2445 AV* const padlist = CvPADLIST(cv);
6b35e009 2446 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2447 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2448 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2449 cx->cx_type = CXt_SUB;
b150fb22 2450 }
a0d0e21e 2451 cx->blk_sub.cv = cv;
1a5b3db4 2452 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2453
a0d0e21e
LW
2454 CvDEPTH(cv)++;
2455 if (CvDEPTH(cv) < 2)
74c765eb 2456 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2457 else {
2b9dff67 2458 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2459 sub_crush_depth(cv);
26019298 2460 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2461 }
fd617465
DM
2462 SAVECOMPPAD();
2463 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2464 if (CxHASARGS(cx))
6d4ff0d2 2465 {
b37c2d43 2466 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2467
3280af22 2468 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2469 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2470 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2471 cx->blk_sub.argarray = av;
a0d0e21e
LW
2472
2473 if (items >= AvMAX(av) + 1) {
b37c2d43 2474 SV **ary = AvALLOC(av);
a0d0e21e
LW
2475 if (AvARRAY(av) != ary) {
2476 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2477 AvARRAY(av) = ary;
a0d0e21e
LW
2478 }
2479 if (items >= AvMAX(av) + 1) {
2480 AvMAX(av) = items - 1;
2481 Renew(ary,items+1,SV*);
2482 AvALLOC(av) = ary;
9c6bc640 2483 AvARRAY(av) = ary;
a0d0e21e
LW
2484 }
2485 }
a45cdc79 2486 ++mark;
a0d0e21e 2487 Copy(mark,AvARRAY(av),items,SV*);
93965878 2488 AvFILLp(av) = items - 1;
d8b46c1b 2489 assert(!AvREAL(av));
b1464ded
DM
2490 if (reified) {
2491 /* transfer 'ownership' of refcnts to new @_ */
2492 AvREAL_on(av);
2493 AvREIFY_off(av);
2494 }
a0d0e21e
LW
2495 while (items--) {
2496 if (*mark)
2497 SvTEMP_off(*mark);
2498 mark++;
2499 }
2500 }
491527d0 2501 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2502 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL
2503 if (PERLDB_GOTO) {
2504 CV * const gotocv = get_cv("DB::goto", FALSE);
2505 if (gotocv) {
2506 PUSHMARK( PL_stack_sp );
2507 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2508 PL_stack_sp--;
2509 }
491527d0 2510 }
1ce6579f 2511 }
a0d0e21e
LW
2512 RETURNOP(CvSTART(cv));
2513 }
2514 }
1614b0e3 2515 else {
0510663f 2516 label = SvPV_nolen_const(sv);
1614b0e3 2517 if (!(do_dump || *label))
cea2e8a9 2518 DIE(aTHX_ must_have_label);
1614b0e3 2519 }
a0d0e21e 2520 }
533c011a 2521 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2522 if (! do_dump)
cea2e8a9 2523 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2524 }
2525 else
2526 label = cPVOP->op_pv;
2527
2528 if (label && *label) {
cbbf8932 2529 OP *gotoprobe = NULL;
3b2447bc 2530 bool leaving_eval = FALSE;
33d34e4c 2531 bool in_block = FALSE;
cbbf8932 2532 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2533
2534 /* find label */
2535
d4c19fe8 2536 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2537 *enterops = 0;
2538 for (ix = cxstack_ix; ix >= 0; ix--) {
2539 cx = &cxstack[ix];
6b35e009 2540 switch (CxTYPE(cx)) {
a0d0e21e 2541 case CXt_EVAL:
3b2447bc 2542 leaving_eval = TRUE;
971ecbe6 2543 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2544 gotoprobe = (last_eval_cx ?
2545 last_eval_cx->blk_eval.old_eval_root :
2546 PL_eval_root);
2547 last_eval_cx = cx;
9c5794fe
RH
2548 break;
2549 }
2550 /* else fall through */
3b719c58
NC
2551 case CXt_LOOP_FOR:
2552 case CXt_LOOP_PLAIN:
a0d0e21e
LW
2553 gotoprobe = cx->blk_oldcop->op_sibling;
2554 break;
2555 case CXt_SUBST:
2556 continue;
2557 case CXt_BLOCK:
33d34e4c 2558 if (ix) {
a0d0e21e 2559 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2560 in_block = TRUE;
2561 } else
3280af22 2562 gotoprobe = PL_main_root;
a0d0e21e 2563 break;
b3933176 2564 case CXt_SUB:
9850bf21 2565 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2566 gotoprobe = CvROOT(cx->blk_sub.cv);
2567 break;
2568 }
2569 /* FALL THROUGH */
7766f137 2570 case CXt_FORMAT:
0a753a76 2571 case CXt_NULL:
a651a37d 2572 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2573 default:
2574 if (ix)
cea2e8a9 2575 DIE(aTHX_ "panic: goto");
3280af22 2576 gotoprobe = PL_main_root;
a0d0e21e
LW
2577 break;
2578 }
2b597662
GS
2579 if (gotoprobe) {
2580 retop = dofindlabel(gotoprobe, label,
2581 enterops, enterops + GOTO_DEPTH);
2582 if (retop)
2583 break;
2584 }
3280af22 2585 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2586 }
2587 if (!retop)
cea2e8a9 2588 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2589
3b2447bc
RH
2590 /* if we're leaving an eval, check before we pop any frames
2591 that we're not going to punt, otherwise the error
2592 won't be caught */
2593
2594 if (leaving_eval && *enterops && enterops[1]) {
2595 I32 i;
2596 for (i = 1; enterops[i]; i++)
2597 if (enterops[i]->op_type == OP_ENTERITER)
2598 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2599 }
2600
a0d0e21e
LW
2601 /* pop unwanted frames */
2602
2603 if (ix < cxstack_ix) {
2604 I32 oldsave;
2605
2606 if (ix < 0)
2607 ix = 0;
2608 dounwind(ix);
2609 TOPBLOCK(cx);
3280af22 2610 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2611 LEAVE_SCOPE(oldsave);
2612 }
2613
2614 /* push wanted frames */
2615
748a9306 2616 if (*enterops && enterops[1]) {
0bd48802 2617 OP * const oldop = PL_op;
33d34e4c
AE
2618 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2619 for (; enterops[ix]; ix++) {
533c011a 2620 PL_op = enterops[ix];
84902520
TB
2621 /* Eventually we may want to stack the needed arguments
2622 * for each op. For now, we punt on the hard ones. */
533c011a 2623 if (PL_op->op_type == OP_ENTERITER)
894356b3 2624 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2625 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2626 }
533c011a 2627 PL_op = oldop;
a0d0e21e
LW
2628 }
2629 }
2630
2631 if (do_dump) {
a5f75d66 2632#ifdef VMS
6b88bc9c 2633 if (!retop) retop = PL_main_start;
a5f75d66 2634#endif
3280af22
NIS
2635 PL_restartop = retop;
2636 PL_do_undump = TRUE;
a0d0e21e
LW
2637
2638 my_unexec();
2639
3280af22
NIS
2640 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2641 PL_do_undump = FALSE;
a0d0e21e
LW
2642 }
2643
2644 RETURNOP(retop);
2645}
2646
2647PP(pp_exit)
2648{
97aff369 2649 dVAR;
39644a26 2650 dSP;
a0d0e21e
LW
2651 I32 anum;
2652
2653 if (MAXARG < 1)
2654 anum = 0;
ff0cee69 2655 else {
a0d0e21e 2656 anum = SvIVx(POPs);
d98f61e7
GS
2657#ifdef VMS
2658 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2659 anum = 0;
96e176bf 2660 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2661#endif
2662 }
cc3604b1 2663 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2664#ifdef PERL_MAD
2665 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2666 if (anum || !(PL_minus_c && PL_madskills))
2667 my_exit(anum);
2668#else
a0d0e21e 2669 my_exit(anum);
81d86705 2670#endif
3280af22 2671 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2672 RETURN;
2673}
2674
a0d0e21e
LW
2675/* Eval. */
2676
0824fdcb 2677STATIC void
cea2e8a9 2678S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2679{
504618e9 2680 const char *s = SvPVX_const(sv);
890ce7af 2681 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2682 I32 line = 1;
a0d0e21e
LW
2683
2684 while (s && s < send) {
f54cb97a 2685 const char *t;
b9f83d2f 2686 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2687
a0d0e21e
LW
2688 t = strchr(s, '\n');
2689 if (t)
2690 t++;
2691 else
2692 t = send;
2693
2694 sv_setpvn(tmpstr, s, t - s);
2695 av_store(array, line++, tmpstr);
2696 s = t;
2697 }
2698}
2699
0824fdcb 2700STATIC OP *
cea2e8a9 2701S_docatch(pTHX_ OP *o)
1e422769 2702{
97aff369 2703 dVAR;
6224f72b 2704 int ret;
06b5626a 2705 OP * const oldop = PL_op;
db36c5a1 2706 dJMPENV;
1e422769 2707
1e422769 2708#ifdef DEBUGGING
54310121 2709 assert(CATCH_GET == TRUE);
1e422769 2710#endif
312caa8e 2711 PL_op = o;
8bffa5f8 2712
14dd3ad8 2713 JMPENV_PUSH(ret);
6224f72b 2714 switch (ret) {
312caa8e 2715 case 0:
abd70938
DM
2716 assert(cxstack_ix >= 0);
2717 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2718 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2719 redo_body:
85aaa934 2720 CALLRUNOPS(aTHX);
312caa8e
CS
2721 break;
2722 case 3:
8bffa5f8 2723 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2724
2725 /* NB XXX we rely on the old popped CxEVAL still being at the top
2726 * of the stack; the way die_where() currently works, this
2727 * assumption is valid. In theory The cur_top_env value should be
2728 * returned in another global, the way retop (aka PL_restartop)
2729 * is. */
2730 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2731
2732 if (PL_restartop
2733 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2734 {
312caa8e
CS
2735 PL_op = PL_restartop;
2736 PL_restartop = 0;
2737 goto redo_body;
2738 }
2739 /* FALL THROUGH */
2740 default:
14dd3ad8 2741 JMPENV_POP;
533c011a 2742 PL_op = oldop;
6224f72b 2743 JMPENV_JUMP(ret);
1e422769 2744 /* NOTREACHED */
1e422769 2745 }
14dd3ad8 2746 JMPENV_POP;
533c011a 2747 PL_op = oldop;
5f66b61c 2748 return NULL;
1e422769
PP
2749}
2750
c277df42 2751OP *
bfed75c6 2752Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2753/* sv Text to convert to OP tree. */
2754/* startop op_free() this to undo. */
2755/* code Short string id of the caller. */
2756{
f7997f86 2757 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2758 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2759 PERL_CONTEXT *cx;
2760 SV **newsp;
b094c71d 2761 I32 gimme = G_VOID;
c277df42
IZ
2762 I32 optype;
2763 OP dummy;
83ee9e09
GS
2764 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2765 char *tmpbuf = tbuf;
c277df42 2766 char *safestr;
a3985cdc 2767 int runtime;
601f1833 2768 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2769 STRLEN len;
c277df42
IZ
2770
2771 ENTER;
5486870f 2772 lex_start(sv, NULL, FALSE);
c277df42
IZ
2773 SAVETMPS;
2774 /* switch to eval mode */
2775
923e4eb5 2776 if (IN_PERL_COMPILETIME) {
f4dd75d9 2777 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2778 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2779 }
83ee9e09 2780 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2781 SV * const sv = sv_newmortal();
83ee9e09
GS
2782 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2783 code, (unsigned long)++PL_evalseq,
2784 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2785 tmpbuf = SvPVX(sv);
fc009855 2786 len = SvCUR(sv);
83ee9e09
GS
2787 }
2788 else
d9fad198
JH
2789 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2790 (unsigned long)++PL_evalseq);
f4dd75d9 2791 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2792 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2793 SAVECOPLINE(&PL_compiling);
57843af0 2794 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2795 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2796 deleting the eval's FILEGV from the stash before gv_check() runs
2797 (i.e. before run-time proper). To work around the coredump that
2798 ensues, we always turn GvMULTI_on for any globals that were
2799 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2800 safestr = savepvn(tmpbuf, len);
2801 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2802 SAVEHINTS();
d1ca3daa 2803#ifdef OP_IN_REGISTER
6b88bc9c 2804 PL_opsave = op;
d1ca3daa 2805#else
7766f137 2806 SAVEVPTR(PL_op);
d1ca3daa 2807#endif
c277df42 2808
a3985cdc 2809 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2810 runtime = IN_PERL_RUNTIME;
a3985cdc 2811 if (runtime)
d819b83a 2812 runcv = find_runcv(NULL);
a3985cdc 2813
533c011a 2814 PL_op = &dummy;
13b51b79 2815 PL_op->op_type = OP_ENTEREVAL;
533c011a 2816 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2817 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
a0714e2c 2818 PUSHEVAL(cx, 0, NULL);
a3985cdc
DM
2819
2820 if (runtime)
410be5db 2821 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2822 else
410be5db 2823 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2824 POPBLOCK(cx,PL_curpm);
e84b9f1f 2825 POPEVAL(cx);
c277df42
IZ
2826
2827 (*startop)->op_type = OP_NULL;
22c35a8c 2828 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2829 lex_end();
f3548bdc 2830 /* XXX DAPM do this properly one year */
b37c2d43 2831 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2832 LEAVE;
923e4eb5 2833 if (IN_PERL_COMPILETIME)
623e6609 2834 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2835#ifdef OP_IN_REGISTER
6b88bc9c 2836 op = PL_opsave;
d1ca3daa 2837#endif
9d4ba2ae
AL
2838 PERL_UNUSED_VAR(newsp);
2839 PERL_UNUSED_VAR(optype);
2840
410be5db 2841 return PL_eval_start;
c277df42
IZ
2842}
2843
a3985cdc
DM
2844
2845/*
2846=for apidoc find_runcv
2847
2848Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2849If db_seqp is non_null, skip CVs that are in the DB package and populate
2850*db_seqp with the cop sequence number at the point that the DB:: code was
2851entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2852than in the scope of the debugger itself).
a3985cdc
DM
2853
2854=cut
2855*/
2856
2857CV*
d819b83a 2858Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2859{
97aff369 2860 dVAR;
a3985cdc 2861 PERL_SI *si;
a3985cdc 2862
d819b83a
DM
2863 if (db_seqp)
2864 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2865 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2866 I32 ix;
a3985cdc 2867 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2868 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2869 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2870 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2871 /* skip DB:: code */
2872 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2873 *db_seqp = cx->blk_oldcop->cop_seq;
2874 continue;
2875 }
2876 return cv;
2877 }
a3985cdc
DM
2878 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2879 return PL_compcv;
2880 }
2881 }
2882 return PL_main_cv;
2883}
2884
2885
2886/* Compile a require/do, an eval '', or a /(?{...})/.
2887 * In the last case, startop is non-null, and contains the address of
2888 * a pointer that should be set to the just-compiled code.
2889 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM
2890 * Returns a bool indicating whether the compile was successful; if so,
2891 * PL_eval_start contains the first op of the compiled ocde; otherwise,
2892 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM
2893 */
2894
410be5db 2895STATIC bool
a3985cdc 2896S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2897{
27da23d5 2898 dVAR; dSP;
46c461b5 2899 OP * const saveop = PL_op;
a0d0e21e 2900
6dc8a9e4
IZ
2901 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2902 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2903 : EVAL_INEVAL);
a0d0e21e 2904
1ce6579f
PP
2905 PUSHMARK(SP);
2906
3280af22 2907 SAVESPTR(PL_compcv);
b9f83d2f 2908 PL_compcv = (CV*)newSV_type(SVt_PVCV);
1aff0e91 2909 CvEVAL_on(PL_compcv);
2090ab20
JH
2910 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2911 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2912
a3985cdc 2913 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2914 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2915
dd2155a4 2916 /* set up a scratch pad */
a0d0e21e 2917
dd2155a4 2918 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2919 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2920
07055b4c 2921
81d86705
NC
2922 if (!PL_madskills)
2923 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2924
a0d0e21e
LW
2925 /* make sure we compile in the right package */
2926
ed094faf 2927 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2928 SAVESPTR(PL_curstash);
ed094faf 2929 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2930 }
3c10abe3 2931 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
2932 SAVESPTR(PL_beginav);
2933 PL_beginav = newAV();
2934 SAVEFREESV(PL_beginav);
3c10abe3
AG
2935 SAVESPTR(PL_unitcheckav);
2936 PL_unitcheckav = newAV();
2937 SAVEFREESV(PL_unitcheckav);
a0d0e21e 2938
81d86705 2939#ifdef PERL_MAD
9da243ce 2940 SAVEBOOL(PL_madskills);
81d86705
NC
2941 PL_madskills = 0;
2942#endif
2943
a0d0e21e
LW
2944 /* try to compile it */
2945
5f66b61c 2946 PL_eval_root = NULL;
3280af22 2947 PL_curcop = &PL_compiling;
fc15ae8f 2948 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2949 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2950 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2951 else
c69006e4 2952 sv_setpvn(ERRSV,"",0);
13765c85 2953 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 2954 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2955 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2956 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2957 const char *msg;
bfed75c6 2958
533c011a 2959 PL_op = saveop;
3280af22
NIS
2960 if (PL_eval_root) {
2961 op_free(PL_eval_root);
5f66b61c 2962 PL_eval_root = NULL;
a0d0e21e 2963 }
3280af22 2964 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2965 if (!startop) {
3280af22 2966 POPBLOCK(cx,PL_curpm);
c277df42 2967 POPEVAL(cx);
c277df42 2968 }
a0d0e21e
LW
2969 lex_end();
2970 LEAVE;
9d4ba2ae
AL
2971
2972 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 2973 if (optype == OP_REQUIRE) {
b464bac0 2974 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 2975 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 2976 &PL_sv_undef, 0);
58d3fd3b
SH
2977 Perl_croak(aTHX_ "%sCompilation failed in require",
2978 *msg ? msg : "Unknown error\n");
5a844595
GS
2979 }
2980 else if (startop) {
3280af22 2981 POPBLOCK(cx,PL_curpm);
c277df42 2982 POPEVAL(cx);
5a844595
GS
2983 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2984 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 2985 }
9d7f88dd 2986 else {
9d7f88dd 2987 if (!*msg) {
6502358f 2988 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
2989 }
2990 }
9d4ba2ae 2991 PERL_UNUSED_VAR(newsp);
410be5db
DM
2992 PUSHs(&PL_sv_undef);
2993 PUTBACK;
2994 return FALSE;
a0d0e21e 2995 }
57843af0 2996 CopLINE_set(&PL_compiling, 0);
c277df42 2997 if (startop) {
3280af22 2998 *startop = PL_eval_root;
c277df42 2999 } else
3280af22 3000 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
3001
3002 /* Set the context for this new optree.
3003 * If the last op is an OP_REQUIRE, force scalar context.
3004 * Otherwise, propagate the context from the eval(). */
3005 if (PL_eval_root->op_type == OP_LEAVEEVAL
3006 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
3007 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
3008 == OP_REQUIRE)
3009 scalar(PL_eval_root);
7df0357e 3010 else if ((gimme & G_WANT) == G_VOID)
3280af22 3011 scalarvoid(PL_eval_root);
7df0357e 3012 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3013 list(PL_eval_root);
a0d0e21e 3014 else
3280af22 3015 scalar(PL_eval_root);
a0d0e21e
LW
3016
3017 DEBUG_x(dump_eval());
3018
55497cff 3019 /* Register with debugger: */
6482a30d 3020 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 3021 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP
3022 if (cv) {
3023 dSP;
924508f0 3024 PUSHMARK(SP);
cc49e20b 3025 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 3026 PUTBACK;
864dbfa3 3027 call_sv((SV*)cv, G_DISCARD);
55497cff
PP
3028 }
3029 }
3030
3c10abe3
AG
3031 if (PL_unitcheckav)
3032 call_list(PL_scopestack_ix, PL_unitcheckav);
3033
a0d0e21e
LW
3034 /* compiled okay, so do it */
3035
3280af22
NIS
3036 CvDEPTH(PL_compcv) = 1;
3037 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3038 PL_op = saveop; /* The caller may need it. */
bc177e6b 3039 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3040
410be5db
DM
3041 PUTBACK;
3042 return TRUE;
a0d0e21e
LW
3043}
3044
a6c40364 3045STATIC PerlIO *
0786552a 3046S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP
3047{
3048 Stat_t st;
c445ea15 3049 const int st_rc = PerlLIO_stat(name, &st);
df528165 3050
6b845e56 3051 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3052 return NULL;
ce8abf5f
SP
3053 }
3054
0786552a 3055 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP
3056}
3057
75c20bac 3058#ifndef PERL_DISABLE_PMC
ce8abf5f 3059STATIC PerlIO *
0786552a 3060S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3061{
b295d113
TH
3062 PerlIO *fp;
3063
ce9440c8 3064 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC
3065 SV *const pmcsv = newSV(namelen + 2);
3066 char *const pmc = SvPVX(pmcsv);
a6c40364 3067 Stat_t pmcstat;
50b8ed39
NC
3068
3069 memcpy(pmc, name, namelen);
3070 pmc[namelen] = 'c';
3071 pmc[namelen + 1] = '\0';
3072
a6c40364 3073 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3074 fp = check_type_and_open(name);
a6c40364
GS
3075 }
3076 else {
0786552a 3077 fp = check_type_and_open(pmc);
b295d113 3078 }
a6c40364
GS
3079 SvREFCNT_dec(pmcsv);
3080 }
3081 else {
0786552a 3082 fp = check_type_and_open(name);
b295d113 3083 }
b295d113 3084 return fp;
75c20bac 3085}
7925835c 3086#else
75c20bac 3087# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3088#endif /* !PERL_DISABLE_PMC */
b295d113 3089
a0d0e21e
LW
3090PP(pp_require)
3091{
27da23d5 3092 dVAR; dSP;
c09156bb 3093 register PERL_CONTEXT *cx;
a0d0e21e 3094 SV *sv;
5c144d81 3095 const char *name;
6132ea6c 3096 STRLEN len;
4492be7a
JM
3097 char * unixname;
3098 STRLEN unixlen;
62f5ad7a 3099#ifdef VMS
4492be7a 3100 int vms_unixname = 0;
62f5ad7a 3101#endif
c445ea15
AL
3102 const char *tryname = NULL;
3103 SV *namesv = NULL;
f54cb97a 3104 const I32 gimme = GIMME_V;
bbed91b5 3105 int filter_has_file = 0;
c445ea15 3106 PerlIO *tryrsfp = NULL;
34113e50 3107 SV *filter_cache = NULL;
c445ea15
AL
3108 SV *filter_state = NULL;
3109 SV *filter_sub = NULL;
3110 SV *hook_sv = NULL;
6ec9efec
JH
3111 SV *encoding;
3112 OP *op;
a0d0e21e
LW
3113
3114 sv = POPs;
d7aa5382 3115 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP
3116 sv = new_version(sv);
3117 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3118 upg_version(PL_patchlevel, TRUE);
149c1637 3119 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3120 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3121 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3122 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3123 }
3124 else {
d1029faa
JP
3125 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3126 I32 first = 0;
3127 AV *lav;
3128 SV * const req = SvRV(sv);
3129 SV * const pv = *hv_fetchs((HV*)req, "original", FALSE);
3130
3131 /* get the left hand term */
3132 lav = (AV *)SvRV(*hv_fetchs((HV*)req, "version", FALSE));
3133
3134 first = SvIV(*av_fetch(lav,0,0));
3135 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
3136 || hv_exists((HV*)req, "qv", 2 ) /* qv style */
3137 || av_len(lav) > 1 /* FP with > 3 digits */
3138 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3139 ) {
3140 DIE(aTHX_ "Perl %"SVf" required--this is only "
3141 "%"SVf", stopped", SVfARG(vnormal(req)),
3142 SVfARG(vnormal(PL_patchlevel)));
3143 }
3144 else { /* probably 'use 5.10' or 'use 5.8' */
3145 SV * hintsv = newSV(0);
3146 I32 second = 0;
3147
3148 if (av_len(lav)>=1)
3149 second = SvIV(*av_fetch(lav,1,0));
3150
3151 second /= second >= 600 ? 100 : 10;
3152 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.%d",
3153 (int)first, (int)second,0);
3154 upg_version(hintsv, TRUE);
3155
3156 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3157 "--this is only %"SVf", stopped",
3158 SVfARG(vnormal(req)),
3159 SVfARG(vnormal(hintsv)),
3160 SVfARG(vnormal(PL_patchlevel)));
3161 }
3162 }
468aa647 3163 }
d7aa5382 3164
fbc891ce
RB
3165 /* We do this only with use, not require. */
3166 if (PL_compcv &&
fbc891ce
RB
3167 /* If we request a version >= 5.9.5, load feature.pm with the
3168 * feature bundle that corresponds to the required version. */
2e8342de 3169 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3170 SV *const importsv = vnormal(sv);
3171 *SvPVX_mutable(importsv) = ':';
3172 ENTER;
3173 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3174 LEAVE;
3175 }
3176
3177 RETPUSHYES;
a0d0e21e 3178 }
5c144d81 3179 name = SvPV_const(sv, len);
6132ea6c 3180 if (!(name && len > 0 && *name))
cea2e8a9 3181 DIE(aTHX_ "Null filename used");
4633a7c4 3182 TAINT_PROPER("require");
4492be7a
JM
3183
3184
3185#ifdef VMS
3186 /* The key in the %ENV hash is in the syntax of file passed as the argument
3187 * usually this is in UNIX format, but sometimes in VMS format, which
3188 * can result in a module being pulled in more than once.
3189 * To prevent this, the key must be stored in UNIX format if the VMS
3190 * name can be translated to UNIX.
3191 */
3192 if ((unixname = tounixspec(name, NULL)) != NULL) {
3193 unixlen = strlen(unixname);
3194 vms_unixname = 1;
3195 }
3196 else
3197#endif
3198 {
3199 /* if not VMS or VMS name can not be translated to UNIX, pass it
3200 * through.
3201 */
3202 unixname = (char *) name;
3203 unixlen = len;
3204 }
44f8325f 3205 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM
3206 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3207 unixname, unixlen, 0);
44f8325f
AL
3208 if ( svp ) {
3209 if (*svp != &PL_sv_undef)
3210 RETPUSHYES;
3211 else
087b5369
RD
3212 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3213 "Compilation failed in require", unixname);
44f8325f 3214 }
4d8b06f1 3215 }
a0d0e21e
LW
3216
3217 /* prepare to compile file */
3218
be4b629d 3219 if (path_is_absolute(name)) {
46fc3d4c 3220 tryname = name;
0786552a 3221 tryrsfp = doopen_pm(name, len);
bf4acbe4 3222 }
67627c52
JH
3223#ifdef MACOS_TRADITIONAL
3224 if (!tryrsfp) {
3225 char newname[256];
3226
3227 MacPerl_CanonDir(name, newname, 1);
3228 if (path_is_absolute(newname)) {
3229 tryname = newname;
0786552a 3230 tryrsfp = doopen_pm(newname, strlen(newname));
67627c52
JH
3231 }
3232 }
3233#endif
be4b629d 3234 if (!tryrsfp) {
44f8325f 3235 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3236 I32 i;
748a9306 3237#ifdef VMS
4492be7a 3238 if (vms_unixname)
46fc3d4c
PP
3239#endif
3240 {
d0328fd7 3241 namesv = newSV_type(SVt_PV);
46fc3d4c 3242 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3243 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3244
c38a6530
RD
3245 if (SvTIED_mg((SV*)ar, PERL_MAGIC_tied))
3246 mg_get(dirsv);
bbed91b5
KF
3247 if (SvROK(dirsv)) {
3248 int count;
a3b58a99 3249 SV **svp;
bbed91b5
KF
3250 SV *loader = dirsv;
3251
e14e2dc8
NC
3252 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3253 && !sv_isobject(loader))
3254 {
bbed91b5
KF
3255 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3256 }
3257
b900a521 3258 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3259 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3260 tryname = SvPVX_const(namesv);
c445ea15 3261 tryrsfp = NULL;
bbed91b5
KF
3262
3263 ENTER;
3264 SAVETMPS;
3265 EXTEND(SP, 2);
3266
3267 PUSHMARK(SP);
3268 PUSHs(dirsv);
3269 PUSHs(sv);
3270 PUTBACK;
e982885c
NC
3271 if (sv_isobject(loader))
3272 count = call_method("INC", G_ARRAY);
3273 else
3274 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3275 SPAGAIN;
3276
a3b58a99
RGS
3277 /* Adjust file name if the hook has set an %INC entry */
3278 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3279 if (svp)
3280 tryname = SvPVX_const(*svp);
3281
bbed91b5
KF
3282 if (count > 0) {
3283 int i = 0;
3284 SV *arg;
3285
3286 SP -= count - 1;
3287 arg = SP[i++];
3288
34113e50
NC
3289 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3290 && !isGV_with_GP(SvRV(arg))) {
3291 filter_cache = SvRV(arg);
74c765eb 3292 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3293
3294 if (i < count) {
3295 arg = SP[i++];
3296 }
3297 }
3298
bbed91b5
KF
3299 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3300 arg = SvRV(arg);
3301 }
3302
3303 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3304 IO * const io = GvIO((GV *)arg);
bbed91b5
KF
3305
3306 ++filter_has_file;
3307
3308 if (io) {
3309 tryrsfp = IoIFP(io);
0f7de14d
NC
3310 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3311 PerlIO_close(IoOFP(io));
bbed91b5 3312 }
0f7de14d
NC
3313 IoIFP(io) = NULL;
3314 IoOFP(io) = NULL;
bbed91b5
KF
3315 }
3316
3317 if (i < count) {
3318 arg = SP[i++];
3319 }
3320 }
3321
3322 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3323 filter_sub = arg;
74c765eb 3324 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF
3325
3326 if (i < count) {
3327 filter_state = SP[i];
b37c2d43 3328 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3329 }
34113e50 3330 }
bbed91b5 3331
34113e50
NC
3332 if (!tryrsfp && (filter_cache || filter_sub)) {
3333 tryrsfp = PerlIO_open(BIT_BUCKET,
3334 PERL_SCRIPT_MODE);
bbed91b5 3335 }
1d06aecd 3336 SP--;
bbed91b5
KF
3337 }
3338
3339 PUTBACK;
3340 FREETMPS;
3341 LEAVE;
3342
3343 if (tryrsfp) {
89ccab8c 3344 hook_sv = dirsv;
bbed91b5
KF
3345 break;
3346 }
3347
3348 filter_has_file = 0;
34113e50
NC
3349 if (filter_cache) {
3350 SvREFCNT_dec(filter_cache);
3351 filter_cache = NULL;
3352 }
bbed91b5
KF
3353 if (filter_state) {
3354 SvREFCNT_dec(filter_state);
c445ea15 3355 filter_state = NULL;
bbed91b5
KF
3356 }
3357 if (filter_sub) {
3358 SvREFCNT_dec(filter_sub);
c445ea15 3359 filter_sub = NULL;
bbed91b5
KF
3360 }
3361 }
3362 else {
be4b629d
CN
3363 if (!path_is_absolute(name)
3364#ifdef MACOS_TRADITIONAL
3365 /* We consider paths of the form :a:b ambiguous and interpret them first
3366 as global then as local
3367 */
3368 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3369#endif
3370 ) {
b640a14a
NC
3371 const char *dir;
3372 STRLEN dirlen;
3373
3374 if (SvOK(dirsv)) {
3375 dir = SvPV_const(dirsv, dirlen);
3376 } else {
3377 dir = "";
3378 dirlen = 0;
3379 }
3380
bf4acbe4 3381#ifdef MACOS_TRADITIONAL
67627c52
JH
3382 char buf1[256];
3383 char buf2[256];
3384
3385 MacPerl_CanonDir(name, buf2, 1);
3386 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3387#else
27da23d5 3388# ifdef VMS
bbed91b5 3389 char *unixdir;
c445ea15 3390 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF
3391 continue;
3392 sv_setpv(namesv, unixdir);
3393 sv_catpv(namesv, unixname);
27da23d5 3394# else
a0fd4948 3395# ifdef __SYMBIAN32__
27da23d5
JH
3396 if (PL_origfilename[0] &&
3397 PL_origfilename[1] == ':' &&
3398 !(dir[0] && dir[1] == ':'))
3399 Perl_sv_setpvf(aTHX_ namesv,
3400 "%c:%s\\%s",
3401 PL_origfilename[0],
3402 dir, name);
3403 else
3404 Perl_sv_setpvf(aTHX_ namesv,
3405 "%s\\%s",
3406 dir, name);
3407# else
b640a14a
NC
3408 /* The equivalent of
3409 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
3410 but without the need to parse the format string, or
3411 call strlen on either pointer, and with the correct
3412 allocation up front. */
3413 {
3414 char *tmp = SvGROW(namesv, dirlen + len + 2);
3415
3416 memcpy(tmp, dir, dirlen);
3417 tmp +=dirlen;
3418 *tmp++ = '/';
3419 /* name came from an SV, so it will have a '\0' at the
3420 end that we can copy as part of this memcpy(). */
3421 memcpy(tmp, name, len + 1);
3422
3423 SvCUR_set(namesv, dirlen + len + 1);
3424
3425 /* Don't even actually have to turn SvPOK_on() as we
3426 access it directly with SvPVX() below. */
3427 }
27da23d5
JH
3428# endif
3429# endif
bf4acbe4 3430#endif
bbed91b5 3431 TAINT_PROPER("require");
349d4f2f 3432 tryname = SvPVX_const(namesv);
0786552a 3433 tryrsfp = doopen_pm(tryname, SvCUR(namesv));
bbed91b5
KF
3434 if (tryrsfp) {
3435 if (tryname[0] == '.' && tryname[1] == '/')