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Correct the paramter to Perl_op_xmldump(). The one that got away from
[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 1226 "pseudo-block",
76753e7f
NC
1227 "when",
1228 NULL, /* CXt_BLOCK never actually needs "block" */
1229 "given",
1230 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1231 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1232 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1233 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1234 "subroutine",
76753e7f 1235 "format",
515afda2 1236 "eval",
515afda2 1237 "substitution",
515afda2
NC
1238};
1239
76e3520e 1240STATIC I32
06b5626a 1241S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1242{
97aff369 1243 dVAR;
a0d0e21e 1244 register I32 i;
a0d0e21e
LW
1245
1246 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1247 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1248 switch (CxTYPE(cx)) {
a0d0e21e 1249 case CXt_SUBST:
a0d0e21e 1250 case CXt_SUB:
7766f137 1251 case CXt_FORMAT:
a0d0e21e 1252 case CXt_EVAL:
0a753a76 1253 case CXt_NULL:
0d863452
RH
1254 case CXt_GIVEN:
1255 case CXt_WHEN:
e476b1b5 1256 if (ckWARN(WARN_EXITING))
515afda2
NC
1257 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1258 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1259 if (CxTYPE(cx) == CXt_NULL)
1260 return -1;
1261 break;
c6fdafd0 1262 case CXt_LOOP_LAZYIV:
d01136d6 1263 case CXt_LOOP_LAZYSV:
3b719c58
NC
1264 case CXt_LOOP_FOR:
1265 case CXt_LOOP_PLAIN:
a61a7064 1266 if ( !CxLABEL(cx) || strNE(label, CxLABEL(cx)) ) {
cea2e8a9 1267 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
a61a7064 1268 (long)i, CxLABEL(cx)));
a0d0e21e
LW
1269 continue;
1270 }
cea2e8a9 1271 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1272 return i;
1273 }
1274 }
1275 return i;
1276}
1277
0d863452
RH
1278
1279
e50aee73 1280I32
864dbfa3 1281Perl_dowantarray(pTHX)
e50aee73 1282{
97aff369 1283 dVAR;
f54cb97a 1284 const I32 gimme = block_gimme();
54310121
PP
1285 return (gimme == G_VOID) ? G_SCALAR : gimme;
1286}
1287
1288I32
864dbfa3 1289Perl_block_gimme(pTHX)
54310121 1290{
97aff369 1291 dVAR;
06b5626a 1292 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1293 if (cxix < 0)
46fc3d4c 1294 return G_VOID;
e50aee73 1295
54310121 1296 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1297 case G_VOID:
1298 return G_VOID;
54310121 1299 case G_SCALAR:
e50aee73 1300 return G_SCALAR;
54310121
PP
1301 case G_ARRAY:
1302 return G_ARRAY;
1303 default:
cea2e8a9 1304 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1305 /* NOTREACHED */
1306 return 0;
54310121 1307 }
e50aee73
AD
1308}
1309
78f9721b
SM
1310I32
1311Perl_is_lvalue_sub(pTHX)
1312{
97aff369 1313 dVAR;
06b5626a 1314 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1315 assert(cxix >= 0); /* We should only be called from inside subs */
1316
bafb2adc
NC
1317 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1318 return CxLVAL(cxstack + cxix);
78f9721b
SM
1319 else
1320 return 0;
1321}
1322
76e3520e 1323STATIC I32
901017d6 1324S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1325{
97aff369 1326 dVAR;
a0d0e21e 1327 I32 i;
a0d0e21e 1328 for (i = startingblock; i >= 0; i--) {
901017d6 1329 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1330 switch (CxTYPE(cx)) {
a0d0e21e
LW
1331 default:
1332 continue;
1333 case CXt_EVAL:
1334 case CXt_SUB:
7766f137 1335 case CXt_FORMAT:
cea2e8a9 1336 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1337 return i;
1338 }
1339 }
1340 return i;
1341}
1342
76e3520e 1343STATIC I32
cea2e8a9 1344S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1345{
97aff369 1346 dVAR;
a0d0e21e 1347 I32 i;
a0d0e21e 1348 for (i = startingblock; i >= 0; i--) {
06b5626a 1349 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1350 switch (CxTYPE(cx)) {
a0d0e21e
LW
1351 default:
1352 continue;
1353 case CXt_EVAL:
cea2e8a9 1354 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1355 return i;
1356 }
1357 }
1358 return i;
1359}
1360
76e3520e 1361STATIC I32
cea2e8a9 1362S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1363{
97aff369 1364 dVAR;
a0d0e21e 1365 I32 i;
a0d0e21e 1366 for (i = startingblock; i >= 0; i--) {
901017d6 1367 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1368 switch (CxTYPE(cx)) {
a0d0e21e 1369 case CXt_SUBST:
a0d0e21e 1370 case CXt_SUB:
7766f137 1371 case CXt_FORMAT:
a0d0e21e 1372 case CXt_EVAL:
0a753a76 1373 case CXt_NULL:
e476b1b5 1374 if (ckWARN(WARN_EXITING))
515afda2
NC
1375 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1376 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1377 if ((CxTYPE(cx)) == CXt_NULL)
1378 return -1;
1379 break;
c6fdafd0 1380 case CXt_LOOP_LAZYIV:
d01136d6 1381 case CXt_LOOP_LAZYSV:
3b719c58
NC
1382 case CXt_LOOP_FOR:
1383 case CXt_LOOP_PLAIN:
cea2e8a9 1384 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1385 return i;
1386 }
1387 }
1388 return i;
1389}
1390
0d863452
RH
1391STATIC I32
1392S_dopoptogiven(pTHX_ I32 startingblock)
1393{
97aff369 1394 dVAR;
0d863452
RH
1395 I32 i;
1396 for (i = startingblock; i >= 0; i--) {
1397 register const PERL_CONTEXT *cx = &cxstack[i];
1398 switch (CxTYPE(cx)) {
1399 default:
1400 continue;
1401 case CXt_GIVEN:
1402 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1403 return i;
3b719c58
NC
1404 case CXt_LOOP_PLAIN:
1405 assert(!CxFOREACHDEF(cx));
1406 break;
c6fdafd0 1407 case CXt_LOOP_LAZYIV:
d01136d6 1408 case CXt_LOOP_LAZYSV:
3b719c58 1409 case CXt_LOOP_FOR:
0d863452
RH
1410 if (CxFOREACHDEF(cx)) {
1411 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1412 return i;
1413 }
1414 }
1415 }
1416 return i;
1417}
1418
1419STATIC I32
1420S_dopoptowhen(pTHX_ I32 startingblock)
1421{
97aff369 1422 dVAR;
0d863452
RH
1423 I32 i;
1424 for (i = startingblock; i >= 0; i--) {
1425 register const PERL_CONTEXT *cx = &cxstack[i];
1426 switch (CxTYPE(cx)) {
1427 default:
1428 continue;
1429 case CXt_WHEN:
1430 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1431 return i;
1432 }
1433 }
1434 return i;
1435}
1436
a0d0e21e 1437void
864dbfa3 1438Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1439{
97aff369 1440 dVAR;
a0d0e21e
LW
1441 I32 optype;
1442
1443 while (cxstack_ix > cxix) {
b0d9ce38 1444 SV *sv;
06b5626a 1445 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1446 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1447 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1448 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1449 switch (CxTYPE(cx)) {
c90c0ff4
PP
1450 case CXt_SUBST:
1451 POPSUBST(cx);
1452 continue; /* not break */
a0d0e21e 1453 case CXt_SUB:
b0d9ce38
GS
1454 POPSUB(cx,sv);
1455 LEAVESUB(sv);
a0d0e21e
LW
1456 break;
1457 case CXt_EVAL:
1458 POPEVAL(cx);
1459 break;
c6fdafd0 1460 case CXt_LOOP_LAZYIV:
d01136d6 1461 case CXt_LOOP_LAZYSV:
3b719c58
NC
1462 case CXt_LOOP_FOR:
1463 case CXt_LOOP_PLAIN:
a0d0e21e
LW
1464 POPLOOP(cx);
1465 break;
0a753a76 1466 case CXt_NULL:
a0d0e21e 1467 break;
7766f137
GS
1468 case CXt_FORMAT:
1469 POPFORMAT(cx);
1470 break;
a0d0e21e 1471 }
c90c0ff4 1472 cxstack_ix--;
a0d0e21e 1473 }
1b6737cc 1474 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1475}
1476
5a844595
GS
1477void
1478Perl_qerror(pTHX_ SV *err)
1479{
97aff369 1480 dVAR;
5a844595
GS
1481 if (PL_in_eval)
1482 sv_catsv(ERRSV, err);
1483 else if (PL_errors)
1484 sv_catsv(PL_errors, err);
1485 else
be2597df 1486 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM
1487 if (PL_parser)
1488 ++PL_parser->error_count;
5a844595
GS
1489}
1490
a0d0e21e 1491OP *
35a4481c 1492Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1493{
27da23d5 1494 dVAR;
87582a92 1495
3280af22 1496 if (PL_in_eval) {
a0d0e21e 1497 I32 cxix;
a0d0e21e 1498 I32 gimme;
a0d0e21e 1499
4e6ea2c3 1500 if (message) {
faef0170 1501 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1502 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1503 SV * const err = ERRSV;
c445ea15 1504 const char *e = NULL;
98eae8f5 1505 if (!SvPOK(err))
c69006e4 1506 sv_setpvn(err,"",0);
98eae8f5 1507 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1508 STRLEN len;
349d4f2f 1509 e = SvPV_const(err, len);
0510663f 1510 e += len - msglen;
98eae8f5 1511 if (*e != *message || strNE(e,message))
c445ea15 1512 e = NULL;
98eae8f5
GS
1513 }
1514 if (!e) {
1515 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1516 sv_catpvn(err, prefix, sizeof(prefix)-1);
1517 sv_catpvn(err, message, msglen);
e476b1b5 1518 if (ckWARN(WARN_MISC)) {
504618e9 1519 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1520 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1521 }
4633a7c4 1522 }
4633a7c4 1523 }
1aa99e6b 1524 else {
06bf62c7 1525 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1526 }
4633a7c4 1527 }
4e6ea2c3 1528
5a844595
GS
1529 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1530 && PL_curstackinfo->si_prev)
1531 {
bac4b2ad 1532 dounwind(-1);
d3acc0f7 1533 POPSTACK;
bac4b2ad 1534 }
e336de0d 1535
a0d0e21e
LW
1536 if (cxix >= 0) {
1537 I32 optype;
35a4481c 1538 register PERL_CONTEXT *cx;
901017d6 1539 SV **newsp;
a0d0e21e
LW
1540
1541 if (cxix < cxstack_ix)
1542 dounwind(cxix);
1543
3280af22 1544 POPBLOCK(cx,PL_curpm);
6b35e009 1545 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1546 if (!message)
349d4f2f 1547 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1548 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1549 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1550 my_exit(1);
1551 }
1552 POPEVAL(cx);
1553
1554 if (gimme == G_SCALAR)
3280af22
NIS
1555 *++newsp = &PL_sv_undef;
1556 PL_stack_sp = newsp;
a0d0e21e
LW
1557
1558 LEAVE;
748a9306 1559
7fb6a879
GS
1560 /* LEAVE could clobber PL_curcop (see save_re_context())
1561 * XXX it might be better to find a way to avoid messing with
1562 * PL_curcop in save_re_context() instead, but this is a more
1563 * minimal fix --GSAR */
1564 PL_curcop = cx->blk_oldcop;
1565
7a2e2cd6 1566 if (optype == OP_REQUIRE) {
44f8325f 1567 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1568 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1569 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1570 &PL_sv_undef, 0);
5a844595
GS
1571 DIE(aTHX_ "%sCompilation failed in require",
1572 *msg ? msg : "Unknown error\n");
7a2e2cd6 1573 }
f39bc417
DM
1574 assert(CxTYPE(cx) == CXt_EVAL);
1575 return cx->blk_eval.retop;
a0d0e21e
LW
1576 }
1577 }
9cc2fdd3 1578 if (!message)
349d4f2f 1579 message = SvPVx_const(ERRSV, msglen);
87582a92 1580
7ff03255 1581 write_to_stderr(message, msglen);
f86702cc
PP
1582 my_failure_exit();
1583 /* NOTREACHED */
a0d0e21e
LW
1584 return 0;
1585}
1586
1587PP(pp_xor)
1588{
97aff369 1589 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1590 if (SvTRUE(left) != SvTRUE(right))
1591 RETSETYES;
1592 else
1593 RETSETNO;
1594}
1595
a0d0e21e
LW
1596PP(pp_caller)
1597{
97aff369 1598 dVAR;
39644a26 1599 dSP;
a0d0e21e 1600 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1601 register const PERL_CONTEXT *cx;
1602 register const PERL_CONTEXT *ccstack = cxstack;
1603 const PERL_SI *top_si = PL_curstackinfo;
54310121 1604 I32 gimme;
06b5626a 1605 const char *stashname;
a0d0e21e
LW
1606 I32 count = 0;
1607
1608 if (MAXARG)
1609 count = POPi;
27d41816 1610
a0d0e21e 1611 for (;;) {
2c375eb9
GS
1612 /* we may be in a higher stacklevel, so dig down deeper */
1613 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1614 top_si = top_si->si_prev;
1615 ccstack = top_si->si_cxstack;
1616 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1617 }
a0d0e21e 1618 if (cxix < 0) {
27d41816
DM
1619 if (GIMME != G_ARRAY) {
1620 EXTEND(SP, 1);
a0d0e21e 1621 RETPUSHUNDEF;
27d41816 1622 }
a0d0e21e
LW
1623 RETURN;
1624 }
f2a7f298 1625 /* caller() should not report the automatic calls to &DB::sub */
1626 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1627 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1628 count++;
1629 if (!count--)
1630 break;
2c375eb9 1631 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1632 }
2c375eb9
GS
1633
1634 cx = &ccstack[cxix];
7766f137 1635 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1636 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1637 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1638 field below is defined for any cx. */
f2a7f298 1639 /* caller() should not report the automatic calls to &DB::sub */
1640 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1641 cx = &ccstack[dbcxix];
06a5b730
PP
1642 }
1643
ed094faf 1644 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1645 if (GIMME != G_ARRAY) {
27d41816 1646 EXTEND(SP, 1);
ed094faf 1647 if (!stashname)
3280af22 1648 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1649 else {
1650 dTARGET;
ed094faf 1651 sv_setpv(TARG, stashname);
49d8d3a1
MB
1652 PUSHs(TARG);
1653 }
a0d0e21e
LW
1654 RETURN;
1655 }
a0d0e21e 1656
b3ca2e83 1657 EXTEND(SP, 11);
27d41816 1658
ed094faf 1659 if (!stashname)
3280af22 1660 PUSHs(&PL_sv_undef);
49d8d3a1 1661 else
6e449a3a
MHM
1662 mPUSHs(newSVpv(stashname, 0));
1663 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1664 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW
1665 if (!MAXARG)
1666 RETURN;
7766f137 1667 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1668 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1669 /* So is ccstack[dbcxix]. */
07b8c804 1670 if (isGV(cvgv)) {
561b68a9 1671 SV * const sv = newSV(0);
c445ea15 1672 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1673 mPUSHs(sv);
bf38a478 1674 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS
1675 }
1676 else {
84bafc02 1677 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1678 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1679 }
a0d0e21e
LW
1680 }
1681 else {
84bafc02 1682 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1683 mPUSHi(0);
a0d0e21e 1684 }
54310121
PP
1685 gimme = (I32)cx->blk_gimme;
1686 if (gimme == G_VOID)
3280af22 1687 PUSHs(&PL_sv_undef);
54310121 1688 else
98625aca 1689 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1690 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1691 /* eval STRING */
85a64632 1692 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1693 PUSHs(cx->blk_eval.cur_text);
3280af22 1694 PUSHs(&PL_sv_no);
0f79a09d 1695 }
811a4de9 1696 /* require */
0f79a09d 1697 else if (cx->blk_eval.old_namesv) {
6e449a3a 1698 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1699 PUSHs(&PL_sv_yes);
06a5b730 1700 }
811a4de9
GS
1701 /* eval BLOCK (try blocks have old_namesv == 0) */
1702 else {
1703 PUSHs(&PL_sv_undef);
1704 PUSHs(&PL_sv_undef);
1705 }
4633a7c4 1706 }
a682de96
GS
1707 else {
1708 PUSHs(&PL_sv_undef);
1709 PUSHs(&PL_sv_undef);
1710 }
bafb2adc 1711 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1712 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1713 {
66a1b24b
AL
1714 AV * const ary = cx->blk_sub.argarray;
1715 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1716
3280af22 1717 if (!PL_dbargs) {
71315bf2 1718 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1719 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1720 GvMULTI_on(tmpgv);
3ddcf04c 1721 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1722 }
1723
3280af22
NIS
1724 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1725 av_extend(PL_dbargs, AvFILLp(ary) + off);
1726 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1727 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1728 }
f3aa04c2
GS
1729 /* XXX only hints propagated via op_private are currently
1730 * visible (others are not easily accessible, since they
1731 * use the global PL_hints) */
6e449a3a 1732 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS
1733 {
1734 SV * mask ;
72dc9ed5 1735 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1736
ac27b0f5 1737 if (old_warnings == pWARN_NONE ||
114bafba 1738 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1739 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1740 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1741 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1742 /* Get the bit mask for $warnings::Bits{all}, because
1743 * it could have been extended by warnings::register */
1744 SV **bits_all;
0bd48802 1745 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1746 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1747 mask = newSVsv(*bits_all);
1748 }
1749 else {
1750 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1751 }
1752 }
e476b1b5 1753 else
72dc9ed5 1754 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1755 mPUSHs(mask);
e476b1b5 1756 }
b3ca2e83 1757
c28fe1ec 1758 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1759 sv_2mortal(newRV_noinc(
c28fe1ec
NC
1760 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1761 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1762 : &PL_sv_undef);
a0d0e21e
LW
1763 RETURN;
1764}
1765
a0d0e21e
LW
1766PP(pp_reset)
1767{
97aff369 1768 dVAR;
39644a26 1769 dSP;
10edeb5d 1770 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1771 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1772 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1773 RETURN;
1774}
1775
dd2155a4
DM
1776/* like pp_nextstate, but used instead when the debugger is active */
1777
a0d0e21e
LW
1778PP(pp_dbstate)
1779{
27da23d5 1780 dVAR;
533c011a 1781 PL_curcop = (COP*)PL_op;
a0d0e21e 1782 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1783 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1784 FREETMPS;
1785
5df8de69
DM
1786 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1787 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1788 {
39644a26 1789 dSP;
c09156bb 1790 register PERL_CONTEXT *cx;
f54cb97a 1791 const I32 gimme = G_ARRAY;
eb160463 1792 U8 hasargs;
0bd48802
AL
1793 GV * const gv = PL_DBgv;
1794 register CV * const cv = GvCV(gv);
a0d0e21e 1795
a0d0e21e 1796 if (!cv)
cea2e8a9 1797 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1798
aea4f609
DM
1799 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1800 /* don't do recursive DB::DB call */
a0d0e21e 1801 return NORMAL;
748a9306 1802
4633a7c4
LW
1803 ENTER;
1804 SAVETMPS;
1805
3280af22 1806 SAVEI32(PL_debug);
55497cff 1807 SAVESTACK_POS();
3280af22 1808 PL_debug = 0;
748a9306 1809 hasargs = 0;
924508f0 1810 SPAGAIN;
748a9306 1811
aed2304a 1812 if (CvISXSUB(cv)) {
c127bd3a
SF
1813 CvDEPTH(cv)++;
1814 PUSHMARK(SP);
1815 (void)(*CvXSUB(cv))(aTHX_ cv);
1816 CvDEPTH(cv)--;
1817 FREETMPS;
1818 LEAVE;
1819 return NORMAL;
1820 }
1821 else {
1822 PUSHBLOCK(cx, CXt_SUB, SP);
1823 PUSHSUB_DB(cx);
1824 cx->blk_sub.retop = PL_op->op_next;
1825 CvDEPTH(cv)++;
1826 SAVECOMPPAD();
1827 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1828 RETURNOP(CvSTART(cv));
1829 }
a0d0e21e
LW
1830 }
1831 else
1832 return NORMAL;
1833}
1834
a0d0e21e
LW
1835PP(pp_enteriter)
1836{
27da23d5 1837 dVAR; dSP; dMARK;
c09156bb 1838 register PERL_CONTEXT *cx;
f54cb97a 1839 const I32 gimme = GIMME_V;
a0d0e21e 1840 SV **svp;
840fe433 1841 U8 cxtype = CXt_LOOP_FOR;
7766f137 1842#ifdef USE_ITHREADS
e846cb92 1843 PAD *iterdata;
7766f137 1844#endif
a0d0e21e 1845
4633a7c4
LW
1846 ENTER;
1847 SAVETMPS;
1848
533c011a 1849 if (PL_op->op_targ) {
14f338dc
DM
1850 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1851 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1852 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1853 SVs_PADSTALE, SVs_PADSTALE);
1854 }
09edbca0 1855 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
c3564e5c 1856#ifndef USE_ITHREADS
dd2155a4 1857 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
c3564e5c 1858#else
e846cb92 1859 iterdata = NULL;
7766f137 1860#endif
54b9620d
MB
1861 }
1862 else {
0bd48802 1863 GV * const gv = (GV*)POPs;
7766f137 1864 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1865 SAVEGENERICSV(*svp);
561b68a9 1866 *svp = newSV(0);
7766f137 1867#ifdef USE_ITHREADS
e846cb92 1868 iterdata = (PAD*)gv;
7766f137 1869#endif
54b9620d 1870 }
4633a7c4 1871
0d863452
RH
1872 if (PL_op->op_private & OPpITER_DEF)
1873 cxtype |= CXp_FOR_DEF;
1874
a0d0e21e
LW
1875 ENTER;
1876
7766f137
GS
1877 PUSHBLOCK(cx, cxtype, SP);
1878#ifdef USE_ITHREADS
e846cb92 1879 PUSHLOOP_FOR(cx, iterdata, MARK, PL_op->op_targ);
7766f137 1880#else
52d1f6fb 1881 PUSHLOOP_FOR(cx, svp, MARK, 0);
7766f137 1882#endif
533c011a 1883 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS
1884 SV *maybe_ary = POPs;
1885 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 1886 dPOPss;
d01136d6 1887 SV * const right = maybe_ary;
984a4bea
RD
1888 SvGETMAGIC(sv);
1889 SvGETMAGIC(right);
4fe3f0fa 1890 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 1891 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC
1892 cx->cx_type |= CXt_LOOP_LAZYIV;
1893 /* Make sure that no-one re-orders cop.h and breaks our
1894 assumptions */
1895 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040
JH
1896#ifdef NV_PRESERVES_UV
1897 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1898 (SvNV(sv) > (NV)IV_MAX)))
1899 ||
1900 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1901 (SvNV(right) < (NV)IV_MIN))))
1902#else
1903 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1904 ||
1905 ((SvNV(sv) > 0) &&
1906 ((SvUV(sv) > (UV)IV_MAX) ||
1907 (SvNV(sv) > (NV)UV_MAX)))))
1908 ||
1909 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1910 ||
1911 ((SvNV(right) > 0) &&
1912 ((SvUV(right) > (UV)IV_MAX) ||
1913 (SvNV(right) > (NV)UV_MAX))))))
1914#endif
076d9a11 1915 DIE(aTHX_ "Range iterator outside integer range");
d01136d6
BS
1916 cx->blk_loop.state_u.lazyiv.cur = SvIV(sv);
1917 cx->blk_loop.state_u.lazyiv.end = SvIV(right);
d4665a05
DM
1918#ifdef DEBUGGING
1919 /* for correct -Dstv display */
1920 cx->blk_oldsp = sp - PL_stack_base;
1921#endif
89ea2908 1922 }
3f63a782 1923 else {
d01136d6
BS
1924 cx->cx_type &= ~CXTYPEMASK;
1925 cx->cx_type |= CXt_LOOP_LAZYSV;
1926 /* Make sure that no-one re-orders cop.h and breaks our
1927 assumptions */
1928 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
1929 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
1930 cx->blk_loop.state_u.lazysv.end = right;
1931 SvREFCNT_inc(right);
1932 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC
1933 /* This will do the upgrade to SVt_PV, and warn if the value
1934 is uninitialised. */
10516c54 1935 (void) SvPV_nolen_const(right);
267cc4a8
NC
1936 /* Doing this avoids a check every time in pp_iter in pp_hot.c
1937 to replace !SvOK() with a pointer to "". */
1938 if (!SvOK(right)) {
1939 SvREFCNT_dec(right);
d01136d6 1940 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 1941 }
3f63a782 1942 }
89ea2908 1943 }
d01136d6
BS
1944 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
1945 cx->blk_loop.state_u.ary.ary = (AV*)maybe_ary;
1946 SvREFCNT_inc(maybe_ary);
1947 cx->blk_loop.state_u.ary.ix =
1948 (PL_op->op_private & OPpITER_REVERSED) ?
1949 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
1950 -1;
ef3e5ea9 1951 }
89ea2908 1952 }
d01136d6
BS
1953 else { /* iterating over items on the stack */
1954 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 1955 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 1956 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1957 }
1958 else {
d01136d6 1959 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 1960 }
4633a7c4 1961 }
a0d0e21e
LW
1962
1963 RETURN;
1964}
1965
1966PP(pp_enterloop)
1967{
27da23d5 1968 dVAR; dSP;
c09156bb 1969 register PERL_CONTEXT *cx;
f54cb97a 1970 const I32 gimme = GIMME_V;
a0d0e21e
LW
1971
1972 ENTER;
1973 SAVETMPS;
1974 ENTER;
1975
3b719c58
NC
1976 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
1977 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW
1978
1979 RETURN;
1980}
1981
1982PP(pp_leaveloop)
1983{
27da23d5 1984 dVAR; dSP;
c09156bb 1985 register PERL_CONTEXT *cx;
a0d0e21e
LW
1986 I32 gimme;
1987 SV **newsp;
1988 PMOP *newpm;
1989 SV **mark;
1990
1991 POPBLOCK(cx,newpm);
3b719c58 1992 assert(CxTYPE_is_LOOP(cx));
4fdae800 1993 mark = newsp;
a8bba7fa 1994 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1995
a1f49e72 1996 TAINT_NOT;
54310121 1997 if (gimme == G_VOID)
6f207bd3 1998 NOOP;
54310121
PP
1999 else if (gimme == G_SCALAR) {
2000 if (mark < SP)
2001 *++newsp = sv_mortalcopy(*SP);
2002 else
3280af22 2003 *++newsp = &PL_sv_undef;
a0d0e21e
LW
2004 }
2005 else {
a1f49e72 2006 while (mark < SP) {
a0d0e21e 2007 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
2008 TAINT_NOT; /* Each item is independent */
2009 }
a0d0e21e 2010 }
f86702cc
PP
2011 SP = newsp;
2012 PUTBACK;
2013
a8bba7fa 2014 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2015 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2016
a0d0e21e
LW
2017 LEAVE;
2018 LEAVE;
2019
f86702cc 2020 return NORMAL;
a0d0e21e
LW
2021}
2022
2023PP(pp_return)
2024{
27da23d5 2025 dVAR; dSP; dMARK;
c09156bb 2026 register PERL_CONTEXT *cx;
f86702cc 2027 bool popsub2 = FALSE;
b45de488 2028 bool clear_errsv = FALSE;
a0d0e21e
LW
2029 I32 gimme;
2030 SV **newsp;
2031 PMOP *newpm;
2032 I32 optype = 0;
b0d9ce38 2033 SV *sv;
f39bc417 2034 OP *retop;
a0d0e21e 2035
0bd48802
AL
2036 const I32 cxix = dopoptosub(cxstack_ix);
2037
9850bf21
RH
2038 if (cxix < 0) {
2039 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2040 * sort block, which is a CXt_NULL
2041 * not a CXt_SUB */
2042 dounwind(0);
d7507f74
RH
2043 PL_stack_base[1] = *PL_stack_sp;
2044 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
2045 return 0;
2046 }
9850bf21
RH
2047 else
2048 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2049 }
a0d0e21e
LW
2050 if (cxix < cxstack_ix)
2051 dounwind(cxix);
2052
d7507f74
RH
2053 if (CxMULTICALL(&cxstack[cxix])) {
2054 gimme = cxstack[cxix].blk_gimme;
2055 if (gimme == G_VOID)
2056 PL_stack_sp = PL_stack_base;
2057 else if (gimme == G_SCALAR) {
2058 PL_stack_base[1] = *PL_stack_sp;
2059 PL_stack_sp = PL_stack_base + 1;
2060 }
9850bf21 2061 return 0;
d7507f74 2062 }
9850bf21 2063
a0d0e21e 2064 POPBLOCK(cx,newpm);
6b35e009 2065 switch (CxTYPE(cx)) {
a0d0e21e 2066 case CXt_SUB:
f86702cc 2067 popsub2 = TRUE;
f39bc417 2068 retop = cx->blk_sub.retop;
5dd42e15 2069 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2070 break;
2071 case CXt_EVAL:
b45de488
GS
2072 if (!(PL_in_eval & EVAL_KEEPERR))
2073 clear_errsv = TRUE;
a0d0e21e 2074 POPEVAL(cx);
f39bc417 2075 retop = cx->blk_eval.retop;
1d76a5c3
GS
2076 if (CxTRYBLOCK(cx))
2077 break;
067f92a0 2078 lex_end();
748a9306
LW
2079 if (optype == OP_REQUIRE &&
2080 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2081 {
54310121 2082 /* Unassume the success we assumed earlier. */
901017d6 2083 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2084 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2085 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2086 }
a0d0e21e 2087 break;
7766f137
GS
2088 case CXt_FORMAT:
2089 POPFORMAT(cx);
f39bc417 2090 retop = cx->blk_sub.retop;
7766f137 2091 break;
a0d0e21e 2092 default:
cea2e8a9 2093 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2094 }
2095
a1f49e72 2096 TAINT_NOT;
a0d0e21e 2097 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2098 if (MARK < SP) {
2099 if (popsub2) {
a8bba7fa 2100 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2101 if (SvTEMP(TOPs)) {
2102 *++newsp = SvREFCNT_inc(*SP);
2103 FREETMPS;
2104 sv_2mortal(*newsp);
959e3673
GS
2105 }
2106 else {
2107 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2108 FREETMPS;
959e3673
GS
2109 *++newsp = sv_mortalcopy(sv);
2110 SvREFCNT_dec(sv);
a29cdaf0 2111 }
959e3673
GS
2112 }
2113 else
a29cdaf0 2114 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2115 }
2116 else
a29cdaf0 2117 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2118 }
2119 else
3280af22 2120 *++newsp = &PL_sv_undef;
a0d0e21e 2121 }
54310121 2122 else if (gimme == G_ARRAY) {
a1f49e72 2123 while (++MARK <= SP) {
f86702cc
PP
2124 *++newsp = (popsub2 && SvTEMP(*MARK))
2125 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2126 TAINT_NOT; /* Each item is independent */
2127 }
a0d0e21e 2128 }
3280af22 2129 PL_stack_sp = newsp;
a0d0e21e 2130
5dd42e15 2131 LEAVE;
f86702cc
PP
2132 /* Stack values are safe: */
2133 if (popsub2) {
5dd42e15 2134 cxstack_ix--;
b0d9ce38 2135 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2136 }
b0d9ce38 2137 else
c445ea15 2138 sv = NULL;
3280af22 2139 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2140
b0d9ce38 2141 LEAVESUB(sv);
b45de488 2142 if (clear_errsv)
c69006e4 2143 sv_setpvn(ERRSV,"",0);
f39bc417 2144 return retop;
a0d0e21e
LW
2145}
2146
2147PP(pp_last)
2148{
27da23d5 2149 dVAR; dSP;
a0d0e21e 2150 I32 cxix;
c09156bb 2151 register PERL_CONTEXT *cx;
f86702cc 2152 I32 pop2 = 0;
a0d0e21e 2153 I32 gimme;
8772537c 2154 I32 optype;
a0d0e21e
LW
2155 OP *nextop;
2156 SV **newsp;
2157 PMOP *newpm;
a8bba7fa 2158 SV **mark;
c445ea15 2159 SV *sv = NULL;
9d4ba2ae 2160
a0d0e21e 2161
533c011a 2162 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2163 cxix = dopoptoloop(cxstack_ix);
2164 if (cxix < 0)
a651a37d 2165 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2166 }
2167 else {
2168 cxix = dopoptolabel(cPVOP->op_pv);
2169 if (cxix < 0)
cea2e8a9 2170 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2171 }
2172 if (cxix < cxstack_ix)
2173 dounwind(cxix);
2174
2175 POPBLOCK(cx,newpm);
5dd42e15 2176 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2177 mark = newsp;
6b35e009 2178 switch (CxTYPE(cx)) {
c6fdafd0 2179 case CXt_LOOP_LAZYIV:
d01136d6 2180 case CXt_LOOP_LAZYSV:
3b719c58
NC
2181 case CXt_LOOP_FOR:
2182 case CXt_LOOP_PLAIN:
2183 pop2 = CxTYPE(cx);
a8bba7fa 2184 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2185 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2186 break;
f86702cc 2187 case CXt_SUB:
f86702cc 2188 pop2 = CXt_SUB;
f39bc417 2189 nextop = cx->blk_sub.retop;
a0d0e21e 2190 break;
f86702cc
PP
2191 case CXt_EVAL:
2192 POPEVAL(cx);
f39bc417 2193 nextop = cx->blk_eval.retop;
a0d0e21e 2194 break;
7766f137
GS
2195 case CXt_FORMAT:
2196 POPFORMAT(cx);
f39bc417 2197 nextop = cx->blk_sub.retop;
7766f137 2198 break;
a0d0e21e 2199 default:
cea2e8a9 2200 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2201 }
2202
a1f49e72 2203 TAINT_NOT;
a0d0e21e 2204 if (gimme == G_SCALAR) {
f86702cc
PP
2205 if (MARK < SP)
2206 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2207 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2208 else
3280af22 2209 *++newsp = &PL_sv_undef;
a0d0e21e 2210 }
54310121 2211 else if (gimme == G_ARRAY) {
a1f49e72 2212 while (++MARK <= SP) {
f86702cc
PP
2213 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2214 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2215 TAINT_NOT; /* Each item is independent */
2216 }
f86702cc
PP
2217 }
2218 SP = newsp;
2219 PUTBACK;
2220
5dd42e15
DM
2221 LEAVE;
2222 cxstack_ix--;
f86702cc
PP
2223 /* Stack values are safe: */
2224 switch (pop2) {
c6fdafd0 2225 case CXt_LOOP_LAZYIV:
3b719c58 2226 case CXt_LOOP_PLAIN:
d01136d6 2227 case CXt_LOOP_LAZYSV:
3b719c58 2228 case CXt_LOOP_FOR:
a8bba7fa 2229 POPLOOP(cx); /* release loop vars ... */
4fdae800 2230 LEAVE;
f86702cc
PP
2231 break;
2232 case CXt_SUB:
b0d9ce38 2233 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2234 break;
a0d0e21e 2235 }
3280af22 2236 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2237
b0d9ce38 2238 LEAVESUB(sv);
9d4ba2ae
AL
2239 PERL_UNUSED_VAR(optype);
2240 PERL_UNUSED_VAR(gimme);
f86702cc 2241 return nextop;
a0d0e21e
LW
2242}
2243
2244PP(pp_next)
2245{
27da23d5 2246 dVAR;
a0d0e21e 2247 I32 cxix;
c09156bb 2248 register PERL_CONTEXT *cx;
85538317 2249 I32 inner;
a0d0e21e 2250
533c011a 2251 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2252 cxix = dopoptoloop(cxstack_ix);
2253 if (cxix < 0)
a651a37d 2254 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2255 }
2256 else {
2257 cxix = dopoptolabel(cPVOP->op_pv);
2258 if (cxix < 0)
cea2e8a9 2259 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2260 }
2261 if (cxix < cxstack_ix)
2262 dounwind(cxix);
2263
85538317
GS
2264 /* clear off anything above the scope we're re-entering, but
2265 * save the rest until after a possible continue block */
2266 inner = PL_scopestack_ix;
1ba6ee2b 2267 TOPBLOCK(cx);
85538317
GS
2268 if (PL_scopestack_ix < inner)
2269 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2270 PL_curcop = cx->blk_oldcop;
022eaa24 2271 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW
2272}
2273
2274PP(pp_redo)
2275{
27da23d5 2276 dVAR;
a0d0e21e 2277 I32 cxix;
c09156bb 2278 register PERL_CONTEXT *cx;
a0d0e21e 2279 I32 oldsave;
a034e688 2280 OP* redo_op;
a0d0e21e 2281
533c011a 2282 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2283 cxix = dopoptoloop(cxstack_ix);
2284 if (cxix < 0)
a651a37d 2285 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2286 }
2287 else {
2288 cxix = dopoptolabel(cPVOP->op_pv);
2289 if (cxix < 0)
cea2e8a9 2290 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2291 }
2292 if (cxix < cxstack_ix)
2293 dounwind(cxix);
2294
022eaa24 2295 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM
2296 if (redo_op->op_type == OP_ENTER) {
2297 /* pop one less context to avoid $x being freed in while (my $x..) */
2298 cxstack_ix++;
2299 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2300 redo_op = redo_op->op_next;
2301 }
2302
a0d0e21e 2303 TOPBLOCK(cx);
3280af22 2304 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2305 LEAVE_SCOPE(oldsave);
936c78b5 2306 FREETMPS;
3a1b2b9e 2307 PL_curcop = cx->blk_oldcop;
a034e688 2308 return redo_op;
a0d0e21e
LW
2309}
2310
0824fdcb 2311STATIC OP *
bfed75c6 2312S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2313{
97aff369 2314 dVAR;
a0d0e21e 2315 OP **ops = opstack;
bfed75c6 2316 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2317
fc36a67e 2318 if (ops >= oplimit)
cea2e8a9 2319 Perl_croak(aTHX_ too_deep);
11343788
MB
2320 if (o->op_type == OP_LEAVE ||
2321 o->op_type == OP_SCOPE ||
2322 o->op_type == OP_LEAVELOOP ||
33d34e4c 2323 o->op_type == OP_LEAVESUB ||
11343788 2324 o->op_type == OP_LEAVETRY)
fc36a67e 2325 {
5dc0d613 2326 *ops++ = cUNOPo->op_first;
fc36a67e 2327 if (ops >= oplimit)
cea2e8a9 2328 Perl_croak(aTHX_ too_deep);
fc36a67e 2329 }
c4aa4e48 2330 *ops = 0;
11343788 2331 if (o->op_flags & OPf_KIDS) {
aec46f14 2332 OP *kid;
a0d0e21e 2333 /* First try all the kids at this level, since that's likeliest. */
11343788 2334 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS
2335 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2336 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW
2337 return kid;
2338 }
11343788 2339 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2340 if (kid == PL_lastgotoprobe)
a0d0e21e 2341 continue;
ed8d0fe2
SM
2342 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2343 if (ops == opstack)
2344 *ops++ = kid;
2345 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2346 ops[-1]->op_type == OP_DBSTATE)
2347 ops[-1] = kid;
2348 else
2349 *ops++ = kid;
2350 }
155aba94 2351 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2352 return o;
a0d0e21e
LW
2353 }
2354 }
c4aa4e48 2355 *ops = 0;
a0d0e21e
LW
2356 return 0;
2357}
2358
a0d0e21e
LW
2359PP(pp_goto)
2360{
27da23d5 2361 dVAR; dSP;
cbbf8932 2362 OP *retop = NULL;
a0d0e21e 2363 I32 ix;
c09156bb 2364 register PERL_CONTEXT *cx;
fc36a67e
PP
2365#define GOTO_DEPTH 64
2366 OP *enterops[GOTO_DEPTH];
cbbf8932 2367 const char *label = NULL;
bfed75c6
AL
2368 const bool do_dump = (PL_op->op_type == OP_DUMP);
2369 static const char must_have_label[] = "goto must have label";
a0d0e21e 2370
533c011a 2371 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2372 SV * const sv = POPs;
a0d0e21e
LW
2373
2374 /* This egregious kludge implements goto &subroutine */
2375 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2376 I32 cxix;
c09156bb 2377 register PERL_CONTEXT *cx;
a0d0e21e
LW
2378 CV* cv = (CV*)SvRV(sv);
2379 SV** mark;
2380 I32 items = 0;
2381 I32 oldsave;
b1464ded 2382 bool reified = 0;
a0d0e21e 2383
e8f7dd13 2384 retry:
4aa0a1f7 2385 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2386 const GV * const gv = CvGV(cv);
e8f7dd13 2387 if (gv) {
7fc63493 2388 GV *autogv;
e8f7dd13
GS
2389 SV *tmpstr;
2390 /* autoloaded stub? */
2391 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2392 goto retry;
2393 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2394 GvNAMELEN(gv), FALSE);
2395 if (autogv && (cv = GvCV(autogv)))
2396 goto retry;
2397 tmpstr = sv_newmortal();
c445ea15 2398 gv_efullname3(tmpstr, gv, NULL);
be2597df 2399 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2400 }
cea2e8a9 2401 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2402 }
2403
a0d0e21e 2404 /* First do some returnish stuff. */
b37c2d43 2405 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2406 FREETMPS;
a0d0e21e
LW
2407 cxix = dopoptosub(cxstack_ix);
2408 if (cxix < 0)
cea2e8a9 2409 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2410 if (cxix < cxstack_ix)
2411 dounwind(cxix);
2412 TOPBLOCK(cx);
2d43a17f 2413 SPAGAIN;
564abe23 2414 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2415 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2416 if (CxREALEVAL(cx))
2417 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2418 else
2419 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2420 }
9850bf21
RH
2421 else if (CxMULTICALL(cx))
2422 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2423 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2424 /* put @_ back onto stack */
a0d0e21e 2425 AV* av = cx->blk_sub.argarray;
bfed75c6 2426
93965878 2427 items = AvFILLp(av) + 1;
a45cdc79
DM
2428 EXTEND(SP, items+1); /* @_ could have been extended. */
2429 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2430 SvREFCNT_dec(GvAV(PL_defgv));
2431 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2432 CLEAR_ARGARRAY(av);
d8b46c1b 2433 /* abandon @_ if it got reified */
62b1ebc2 2434 if (AvREAL(av)) {
b1464ded
DM
2435 reified = 1;
2436 SvREFCNT_dec(av);
d8b46c1b
GS
2437 av = newAV();
2438 av_extend(av, items-1);
11ca45c0 2439 AvREIFY_only(av);
dd2155a4 2440 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2441 }
a0d0e21e 2442 }
aed2304a 2443 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2444 AV* const av = GvAV(PL_defgv);
1fa4e549 2445 items = AvFILLp(av) + 1;
a45cdc79
DM
2446 EXTEND(SP, items+1); /* @_ could have been extended. */
2447 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2448 }
a45cdc79
DM
2449 mark = SP;
2450 SP += items;
6b35e009 2451 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2452 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2453 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2454 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2455 LEAVE_SCOPE(oldsave);
2456
2457 /* Now do some callish stuff. */
2458 SAVETMPS;
5023d17a 2459 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2460 if (CvISXSUB(cv)) {
b37c2d43 2461 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2462 SV **newsp;
2463 I32 gimme;
b1464ded
DM
2464 if (reified) {
2465 I32 index;
2466 for (index=0; index<items; index++)
2467 sv_2mortal(SP[-index]);
2468 }
1fa4e549 2469
b37c2d43
AL
2470 /* XS subs don't have a CxSUB, so pop it */
2471 POPBLOCK(cx, PL_curpm);
2472 /* Push a mark for the start of arglist */
2473 PUSHMARK(mark);
2474 PUTBACK;
2475 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2476 LEAVE;
5eff7df7 2477 return retop;
a0d0e21e
LW
2478 }
2479 else {
b37c2d43 2480 AV* const padlist = CvPADLIST(cv);
6b35e009 2481 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2482 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2483 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2484 cx->cx_type = CXt_SUB;
b150fb22 2485 }
a0d0e21e 2486 cx->blk_sub.cv = cv;
1a5b3db4 2487 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2488
a0d0e21e
LW
2489 CvDEPTH(cv)++;
2490 if (CvDEPTH(cv) < 2)
74c765eb 2491 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2492 else {
2b9dff67 2493 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2494 sub_crush_depth(cv);
26019298 2495 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2496 }
fd617465
DM
2497 SAVECOMPPAD();
2498 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2499 if (CxHASARGS(cx))
6d4ff0d2 2500 {
b37c2d43 2501 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2502
3280af22 2503 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2504 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2505 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2506 cx->blk_sub.argarray = av;
a0d0e21e
LW
2507
2508 if (items >= AvMAX(av) + 1) {
b37c2d43 2509 SV **ary = AvALLOC(av);
a0d0e21e
LW
2510 if (AvARRAY(av) != ary) {
2511 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2512 AvARRAY(av) = ary;
a0d0e21e
LW
2513 }
2514 if (items >= AvMAX(av) + 1) {
2515 AvMAX(av) = items - 1;
2516 Renew(ary,items+1,SV*);
2517 AvALLOC(av) = ary;
9c6bc640 2518 AvARRAY(av) = ary;
a0d0e21e
LW
2519 }
2520 }
a45cdc79 2521 ++mark;
a0d0e21e 2522 Copy(mark,AvARRAY(av),items,SV*);
93965878 2523 AvFILLp(av) = items - 1;
d8b46c1b 2524 assert(!AvREAL(av));
b1464ded
DM
2525 if (reified) {
2526 /* transfer 'ownership' of refcnts to new @_ */
2527 AvREAL_on(av);
2528 AvREIFY_off(av);
2529 }
a0d0e21e
LW
2530 while (items--) {
2531 if (*mark)
2532 SvTEMP_off(*mark);
2533 mark++;
2534 }
2535 }
491527d0 2536 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2537 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL
2538 if (PERLDB_GOTO) {
2539 CV * const gotocv = get_cv("DB::goto", FALSE);
2540 if (gotocv) {
2541 PUSHMARK( PL_stack_sp );
2542 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2543 PL_stack_sp--;
2544 }
491527d0 2545 }
1ce6579f 2546 }
a0d0e21e
LW
2547 RETURNOP(CvSTART(cv));
2548 }
2549 }
1614b0e3 2550 else {
0510663f 2551 label = SvPV_nolen_const(sv);
1614b0e3 2552 if (!(do_dump || *label))
cea2e8a9 2553 DIE(aTHX_ must_have_label);
1614b0e3 2554 }
a0d0e21e 2555 }
533c011a 2556 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2557 if (! do_dump)
cea2e8a9 2558 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2559 }
2560 else
2561 label = cPVOP->op_pv;
2562
2563 if (label && *label) {
cbbf8932 2564 OP *gotoprobe = NULL;
3b2447bc 2565 bool leaving_eval = FALSE;
33d34e4c 2566 bool in_block = FALSE;
cbbf8932 2567 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2568
2569 /* find label */
2570
d4c19fe8 2571 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2572 *enterops = 0;
2573 for (ix = cxstack_ix; ix >= 0; ix--) {
2574 cx = &cxstack[ix];
6b35e009 2575 switch (CxTYPE(cx)) {
a0d0e21e 2576 case CXt_EVAL:
3b2447bc 2577 leaving_eval = TRUE;
971ecbe6 2578 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2579 gotoprobe = (last_eval_cx ?
2580 last_eval_cx->blk_eval.old_eval_root :
2581 PL_eval_root);
2582 last_eval_cx = cx;
9c5794fe
RH
2583 break;
2584 }
2585 /* else fall through */
c6fdafd0 2586 case CXt_LOOP_LAZYIV:
d01136d6 2587 case CXt_LOOP_LAZYSV:
3b719c58
NC
2588 case CXt_LOOP_FOR:
2589 case CXt_LOOP_PLAIN:
a0d0e21e
LW
2590 gotoprobe = cx->blk_oldcop->op_sibling;
2591 break;
2592 case CXt_SUBST:
2593 continue;
2594 case CXt_BLOCK:
33d34e4c 2595 if (ix) {
a0d0e21e 2596 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2597 in_block = TRUE;
2598 } else
3280af22 2599 gotoprobe = PL_main_root;
a0d0e21e 2600 break;
b3933176 2601 case CXt_SUB:
9850bf21 2602 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2603 gotoprobe = CvROOT(cx->blk_sub.cv);
2604 break;
2605 }
2606 /* FALL THROUGH */
7766f137 2607 case CXt_FORMAT:
0a753a76 2608 case CXt_NULL:
a651a37d 2609 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2610 default:
2611 if (ix)
cea2e8a9 2612 DIE(aTHX_ "panic: goto");
3280af22 2613 gotoprobe = PL_main_root;
a0d0e21e
LW
2614 break;
2615 }
2b597662
GS
2616 if (gotoprobe) {
2617 retop = dofindlabel(gotoprobe, label,
2618 enterops, enterops + GOTO_DEPTH);
2619 if (retop)
2620 break;
2621 }
3280af22 2622 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2623 }
2624 if (!retop)
cea2e8a9 2625 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2626
3b2447bc
RH
2627 /* if we're leaving an eval, check before we pop any frames
2628 that we're not going to punt, otherwise the error
2629 won't be caught */
2630
2631 if (leaving_eval && *enterops && enterops[1]) {
2632 I32 i;
2633 for (i = 1; enterops[i]; i++)
2634 if (enterops[i]->op_type == OP_ENTERITER)
2635 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2636 }
2637
a0d0e21e
LW
2638 /* pop unwanted frames */
2639
2640 if (ix < cxstack_ix) {
2641 I32 oldsave;
2642
2643 if (ix < 0)
2644 ix = 0;
2645 dounwind(ix);
2646 TOPBLOCK(cx);
3280af22 2647 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2648 LEAVE_SCOPE(oldsave);
2649 }
2650
2651 /* push wanted frames */
2652
748a9306 2653 if (*enterops && enterops[1]) {
0bd48802 2654 OP * const oldop = PL_op;
33d34e4c
AE
2655 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2656 for (; enterops[ix]; ix++) {
533c011a 2657 PL_op = enterops[ix];
84902520
TB
2658 /* Eventually we may want to stack the needed arguments
2659 * for each op. For now, we punt on the hard ones. */
533c011a 2660 if (PL_op->op_type == OP_ENTERITER)
894356b3 2661 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2662 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2663 }
533c011a 2664 PL_op = oldop;
a0d0e21e
LW
2665 }
2666 }
2667
2668 if (do_dump) {
a5f75d66 2669#ifdef VMS
6b88bc9c 2670 if (!retop) retop = PL_main_start;
a5f75d66 2671#endif
3280af22
NIS
2672 PL_restartop = retop;
2673 PL_do_undump = TRUE;
a0d0e21e
LW
2674
2675 my_unexec();
2676
3280af22
NIS
2677 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2678 PL_do_undump = FALSE;
a0d0e21e
LW
2679 }
2680
2681 RETURNOP(retop);
2682}
2683
2684PP(pp_exit)
2685{
97aff369 2686 dVAR;
39644a26 2687 dSP;
a0d0e21e
LW
2688 I32 anum;
2689
2690 if (MAXARG < 1)
2691 anum = 0;
ff0cee69 2692 else {
a0d0e21e 2693 anum = SvIVx(POPs);
d98f61e7
GS
2694#ifdef VMS
2695 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2696 anum = 0;
96e176bf 2697 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2698#endif
2699 }
cc3604b1 2700 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2701#ifdef PERL_MAD
2702 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2703 if (anum || !(PL_minus_c && PL_madskills))
2704 my_exit(anum);
2705#else
a0d0e21e 2706 my_exit(anum);
81d86705 2707#endif
3280af22 2708 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2709 RETURN;
2710}
2711
a0d0e21e
LW
2712/* Eval. */
2713
0824fdcb 2714STATIC void
cea2e8a9 2715S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2716{
504618e9 2717 const char *s = SvPVX_const(sv);
890ce7af 2718 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2719 I32 line = 1;
a0d0e21e
LW
2720
2721 while (s && s < send) {
f54cb97a 2722 const char *t;
b9f83d2f 2723 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2724
a0d0e21e
LW
2725 t = strchr(s, '\n');
2726 if (t)
2727 t++;
2728 else
2729 t = send;
2730
2731 sv_setpvn(tmpstr, s, t - s);
2732 av_store(array, line++, tmpstr);
2733 s = t;
2734 }
2735}
2736
0824fdcb 2737STATIC OP *
cea2e8a9 2738S_docatch(pTHX_ OP *o)
1e422769 2739{
97aff369 2740 dVAR;
6224f72b 2741 int ret;
06b5626a 2742 OP * const oldop = PL_op;
db36c5a1 2743 dJMPENV;
1e422769 2744
1e422769 2745#ifdef DEBUGGING
54310121 2746 assert(CATCH_GET == TRUE);
1e422769 2747#endif
312caa8e 2748 PL_op = o;
8bffa5f8 2749
14dd3ad8 2750 JMPENV_PUSH(ret);
6224f72b 2751 switch (ret) {
312caa8e 2752 case 0:
abd70938
DM
2753 assert(cxstack_ix >= 0);
2754 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2755 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2756 redo_body:
85aaa934 2757 CALLRUNOPS(aTHX);
312caa8e
CS
2758 break;
2759 case 3:
8bffa5f8 2760 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2761
2762 /* NB XXX we rely on the old popped CxEVAL still being at the top
2763 * of the stack; the way die_where() currently works, this
2764 * assumption is valid. In theory The cur_top_env value should be
2765 * returned in another global, the way retop (aka PL_restartop)
2766 * is. */
2767 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2768
2769 if (PL_restartop
2770 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2771 {
312caa8e
CS
2772 PL_op = PL_restartop;
2773 PL_restartop = 0;
2774 goto redo_body;
2775 }
2776 /* FALL THROUGH */
2777 default:
14dd3ad8 2778 JMPENV_POP;
533c011a 2779 PL_op = oldop;
6224f72b 2780 JMPENV_JUMP(ret);
1e422769 2781 /* NOTREACHED */
1e422769 2782 }
14dd3ad8 2783 JMPENV_POP;
533c011a 2784 PL_op = oldop;
5f66b61c 2785 return NULL;
1e422769
PP
2786}
2787
c277df42 2788OP *
bfed75c6 2789Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2790/* sv Text to convert to OP tree. */
2791/* startop op_free() this to undo. */
2792/* code Short string id of the caller. */
2793{
f7997f86 2794 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2795 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2796 PERL_CONTEXT *cx;
2797 SV **newsp;
b094c71d 2798 I32 gimme = G_VOID;
c277df42
IZ
2799 I32 optype;
2800 OP dummy;
83ee9e09
GS
2801 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2802 char *tmpbuf = tbuf;
c277df42 2803 char *safestr;
a3985cdc 2804 int runtime;
601f1833 2805 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2806 STRLEN len;
c277df42
IZ
2807
2808 ENTER;
5486870f 2809 lex_start(sv, NULL, FALSE);
c277df42
IZ
2810 SAVETMPS;
2811 /* switch to eval mode */
2812
923e4eb5 2813 if (IN_PERL_COMPILETIME) {
f4dd75d9 2814 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2815 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2816 }
83ee9e09 2817 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2818 SV * const sv = sv_newmortal();
83ee9e09
GS
2819 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2820 code, (unsigned long)++PL_evalseq,
2821 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2822 tmpbuf = SvPVX(sv);
fc009855 2823 len = SvCUR(sv);
83ee9e09
GS
2824 }
2825 else
d9fad198
JH
2826 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2827 (unsigned long)++PL_evalseq);
f4dd75d9 2828 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2829 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2830 SAVECOPLINE(&PL_compiling);
57843af0 2831 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2832 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2833 deleting the eval's FILEGV from the stash before gv_check() runs
2834 (i.e. before run-time proper). To work around the coredump that
2835 ensues, we always turn GvMULTI_on for any globals that were
2836 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2837 safestr = savepvn(tmpbuf, len);
2838 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2839 SAVEHINTS();
d1ca3daa 2840#ifdef OP_IN_REGISTER
6b88bc9c 2841 PL_opsave = op;
d1ca3daa 2842#else
7766f137 2843 SAVEVPTR(PL_op);
d1ca3daa 2844#endif
c277df42 2845
a3985cdc 2846 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2847 runtime = IN_PERL_RUNTIME;
a3985cdc 2848 if (runtime)
d819b83a 2849 runcv = find_runcv(NULL);
a3985cdc 2850
533c011a 2851 PL_op = &dummy;
13b51b79 2852 PL_op->op_type = OP_ENTEREVAL;
533c011a 2853 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2854 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 2855 PUSHEVAL(cx, 0);
a3985cdc
DM
2856
2857 if (runtime)
410be5db 2858 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2859 else
410be5db 2860 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2861 POPBLOCK(cx,PL_curpm);
e84b9f1f 2862 POPEVAL(cx);
c277df42
IZ
2863
2864 (*startop)->op_type = OP_NULL;
22c35a8c 2865 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2866 lex_end();
f3548bdc 2867 /* XXX DAPM do this properly one year */
b37c2d43 2868 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2869 LEAVE;
923e4eb5 2870 if (IN_PERL_COMPILETIME)
623e6609 2871 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2872#ifdef OP_IN_REGISTER
6b88bc9c 2873 op = PL_opsave;
d1ca3daa 2874#endif
9d4ba2ae
AL
2875 PERL_UNUSED_VAR(newsp);
2876 PERL_UNUSED_VAR(optype);
2877
410be5db 2878 return PL_eval_start;
c277df42
IZ
2879}
2880
a3985cdc
DM
2881
2882/*
2883=for apidoc find_runcv
2884
2885Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2886If db_seqp is non_null, skip CVs that are in the DB package and populate
2887*db_seqp with the cop sequence number at the point that the DB:: code was
2888entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2889than in the scope of the debugger itself).
a3985cdc
DM
2890
2891=cut
2892*/
2893
2894CV*
d819b83a 2895Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2896{
97aff369 2897 dVAR;
a3985cdc 2898 PERL_SI *si;
a3985cdc 2899
d819b83a
DM
2900 if (db_seqp)
2901 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2902 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2903 I32 ix;
a3985cdc 2904 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2905 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2906 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2907 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2908 /* skip DB:: code */
2909 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2910 *db_seqp = cx->blk_oldcop->cop_seq;
2911 continue;
2912 }
2913 return cv;
2914 }
a3985cdc
DM
2915 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2916 return PL_compcv;
2917 }
2918 }
2919 return PL_main_cv;
2920}
2921
2922
2923/* Compile a require/do, an eval '', or a /(?{...})/.
2924 * In the last case, startop is non-null, and contains the address of
2925 * a pointer that should be set to the just-compiled code.
2926 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM
2927 * Returns a bool indicating whether the compile was successful; if so,
2928 * PL_eval_start contains the first op of the compiled ocde; otherwise,
2929 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM
2930 */
2931
410be5db 2932STATIC bool
a3985cdc 2933S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2934{
27da23d5 2935 dVAR; dSP;
46c461b5 2936 OP * const saveop = PL_op;
a0d0e21e 2937
6dc8a9e4
IZ
2938 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2939 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2940 : EVAL_INEVAL);
a0d0e21e 2941
1ce6579f
PP
2942 PUSHMARK(SP);
2943
3280af22 2944 SAVESPTR(PL_compcv);
b9f83d2f 2945 PL_compcv = (CV*)newSV_type(SVt_PVCV);
1aff0e91 2946 CvEVAL_on(PL_compcv);
2090ab20
JH
2947 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2948 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2949
a3985cdc 2950 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2951 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2952
dd2155a4 2953 /* set up a scratch pad */
a0d0e21e 2954
dd2155a4 2955 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2956 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2957
07055b4c 2958
81d86705
NC
2959 if (!PL_madskills)
2960 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2961
a0d0e21e
LW
2962 /* make sure we compile in the right package */
2963
ed094faf 2964 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2965 SAVESPTR(PL_curstash);
ed094faf 2966 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2967 }
3c10abe3 2968 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS
2969 SAVESPTR(PL_beginav);
2970 PL_beginav = newAV();
2971 SAVEFREESV(PL_beginav);
3c10abe3
AG
2972 SAVESPTR(PL_unitcheckav);
2973 PL_unitcheckav = newAV();
2974 SAVEFREESV(PL_unitcheckav);
a0d0e21e 2975
81d86705 2976#ifdef PERL_MAD
9da243ce 2977 SAVEBOOL(PL_madskills);
81d86705
NC
2978 PL_madskills = 0;
2979#endif
2980
a0d0e21e
LW
2981 /* try to compile it */
2982
5f66b61c 2983 PL_eval_root = NULL;
3280af22 2984 PL_curcop = &PL_compiling;
fc15ae8f 2985 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2986 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2987 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2988 else
c69006e4 2989 sv_setpvn(ERRSV,"",0);
13765c85 2990 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 2991 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2992 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2993 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2994 const char *msg;
bfed75c6 2995
533c011a 2996 PL_op = saveop;
3280af22
NIS
2997 if (PL_eval_root) {
2998 op_free(PL_eval_root);
5f66b61c 2999 PL_eval_root = NULL;
a0d0e21e 3000 }
3280af22 3001 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 3002 if (!startop) {
3280af22 3003 POPBLOCK(cx,PL_curpm);
c277df42 3004 POPEVAL(cx);
c277df42 3005 }
a0d0e21e
LW
3006 lex_end();
3007 LEAVE;
9d4ba2ae
AL
3008
3009 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 3010 if (optype == OP_REQUIRE) {
b464bac0 3011 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 3012 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 3013 &PL_sv_undef, 0);
58d3fd3b
SH
3014 Perl_croak(aTHX_ "%sCompilation failed in require",
3015 *msg ? msg : "Unknown error\n");
5a844595
GS
3016 }
3017 else if (startop) {
3280af22 3018 POPBLOCK(cx,PL_curpm);
c277df42 3019 POPEVAL(cx);
5a844595
GS
3020 Perl_croak(aTHX_ "%sCompilation failed in regexp",
3021 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 3022 }
9d7f88dd 3023 else {
9d7f88dd 3024 if (!*msg) {
6502358f 3025 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR
3026 }
3027 }
9d4ba2ae 3028 PERL_UNUSED_VAR(newsp);
410be5db
DM
3029 PUSHs(&PL_sv_undef);
3030 PUTBACK;
3031 return FALSE;
a0d0e21e 3032 }
57843af0 3033 CopLINE_set(&PL_compiling, 0);
c277df42 3034 if (startop) {
3280af22 3035 *startop = PL_eval_root;
c277df42 3036 } else
3280af22 3037 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
3038
3039 /* Set the context for this new optree.
3040 * If the last op is an OP_REQUIRE, force scalar context.
3041 * Otherwise, propagate the context from the eval(). */
3042 if (PL_eval_root->op_type == OP_LEAVEEVAL
3043 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
3044 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
3045 == OP_REQUIRE)
3046 scalar(PL_eval_root);
7df0357e 3047 else if ((gimme & G_WANT) == G_VOID)
3280af22 3048 scalarvoid(PL_eval_root);
7df0357e 3049 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3050 list(PL_eval_root);
a0d0e21e 3051 else
3280af22 3052 scalar(PL_eval_root);
a0d0e21e
LW
3053
3054 DEBUG_x(dump_eval());
3055
55497cff 3056 /* Register with debugger: */
6482a30d 3057 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 3058 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP
3059 if (cv) {
3060 dSP;
924508f0 3061 PUSHMARK(SP);
cc49e20b 3062 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 3063 PUTBACK;
864dbfa3 3064 call_sv((SV*)cv, G_DISCARD);
55497cff
PP
3065 }
3066 }
3067
3c10abe3
AG
3068 if (PL_unitcheckav)
3069 call_list(PL_scopestack_ix, PL_unitcheckav);
3070
a0d0e21e
LW
3071 /* compiled okay, so do it */
3072
3280af22
NIS
3073 CvDEPTH(PL_compcv) = 1;
3074 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3075 PL_op = saveop; /* The caller may need it. */
bc177e6b 3076 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3077
410be5db
DM
3078 PUTBACK;
3079 return TRUE;
a0d0e21e
LW
3080}
3081
a6c40364 3082STATIC PerlIO *
0786552a 3083S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP
3084{
3085 Stat_t st;
c445ea15 3086 const int st_rc = PerlLIO_stat(name, &st);
df528165 3087
6b845e56 3088 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3089 return NULL;
ce8abf5f
SP
3090 }
3091
0786552a 3092 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP
3093}
3094
75c20bac 3095#ifndef PERL_DISABLE_PMC
ce8abf5f 3096STATIC PerlIO *
0786552a 3097S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3098{
b295d113
TH
3099 PerlIO *fp;
3100
ce9440c8 3101 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC
3102 SV *const pmcsv = newSV(namelen + 2);
3103 char *const pmc = SvPVX(pmcsv);
a6c40364 3104 Stat_t pmcstat;
50b8ed39
NC
3105
3106 memcpy(pmc, name, namelen);
3107 pmc[namelen] = 'c';
3108 pmc[namelen + 1] = '\0';
3109
a6c40364 3110 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3111 fp = check_type_and_open(name);
a6c40364
GS
3112 }
3113 else {
0786552a 3114 fp = check_type_and_open(pmc);
b295d113 3115 }
a6c40364
GS
3116 SvREFCNT_dec(pmcsv);
3117 }
3118 else {
0786552a 3119 fp = check_type_and_open(name);
b295d113 3120 }
b295d113 3121 return fp;
75c20bac 3122}
7925835c 3123#else
75c20bac 3124# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3125#endif /* !PERL_DISABLE_PMC */
b295d113 3126
a0d0e21e
LW
3127PP(pp_require)
3128{
27da23d5 3129 dVAR; dSP;
c09156bb 3130 register PERL_CONTEXT *cx;
a0d0e21e 3131 SV *sv;
5c144d81 3132 const char *name;
6132ea6c 3133 STRLEN len;
4492be7a
JM
3134 char * unixname;
3135 STRLEN unixlen;
62f5ad7a 3136#ifdef VMS
4492be7a 3137 int vms_unixname = 0;
62f5ad7a 3138#endif
c445ea15
AL
3139 const char *tryname = NULL;
3140 SV *namesv = NULL;
f54cb97a 3141 const I32 gimme = GIMME_V;
bbed91b5 3142 int filter_has_file = 0;
c445ea15 3143 PerlIO *tryrsfp = NULL;
34113e50 3144 SV *filter_cache = NULL;
c445ea15
AL
3145 SV *filter_state = NULL;
3146 SV *filter_sub = NULL;
3147 SV *hook_sv = NULL;
6ec9efec
JH
3148 SV *encoding;
3149 OP *op;
a0d0e21e
LW
3150
3151 sv = POPs;
d7aa5382 3152 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP
3153 sv = new_version(sv);
3154 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3155 upg_version(PL_patchlevel, TRUE);
149c1637 3156 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3157 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3158 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3159 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS
3160 }
3161 else {
d1029faa
JP
3162 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3163 I32 first = 0;
3164 AV *lav;
3165 SV * const req = SvRV(sv);
3166 SV * const pv = *hv_fetchs((HV*)req, "original", FALSE);
3167
3168 /* get the left hand term */
3169 lav = (AV *)SvRV(*hv_fetchs((HV*)req, "version", FALSE));
3170
3171 first = SvIV(*av_fetch(lav,0,0));
3172 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
3173 || hv_exists((HV*)req, "qv", 2 ) /* qv style */
3174 || av_len(lav) > 1 /* FP with > 3 digits */
3175 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3176 ) {
3177 DIE(aTHX_ "Perl %"SVf" required--this is only "
3178 "%"SVf", stopped", SVfARG(vnormal(req)),
3179 SVfARG(vnormal(PL_patchlevel)));
3180 }
3181 else { /* probably 'use 5.10' or 'use 5.8' */
3182 SV * hintsv = newSV(0);
3183 I32 second = 0;
3184
3185 if (av_len(lav)>=1)
3186 second = SvIV(*av_fetch(lav,1,0));
3187
3188 second /= second >= 600 ? 100 : 10;
3189 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.%d",
3190 (int)first, (int)second,0);
3191 upg_version(hintsv, TRUE);
3192
3193 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3194 "--this is only %"SVf", stopped",
3195 SVfARG(vnormal(req)),
3196 SVfARG(vnormal(hintsv)),
3197 SVfARG(vnormal(PL_patchlevel)));
3198 }
3199 }
468aa647 3200 }
d7aa5382 3201
fbc891ce
RB
3202 /* We do this only with use, not require. */
3203 if (PL_compcv &&
fbc891ce
RB
3204 /* If we request a version >= 5.9.5, load feature.pm with the
3205 * feature bundle that corresponds to the required version. */
2e8342de 3206 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS
3207 SV *const importsv = vnormal(sv);
3208 *SvPVX_mutable(importsv) = ':';
3209 ENTER;
3210 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3211 LEAVE;
3212 }
3213
3214 RETPUSHYES;
a0d0e21e 3215 }
5c144d81 3216 name = SvPV_const(sv, len);
6132ea6c 3217 if (!(name && len > 0 && *name))
cea2e8a9 3218 DIE(aTHX_ "Null filename used");
4633a7c4 3219 TAINT_PROPER("require");
4492be7a
JM
3220
3221
3222#ifdef VMS
3223 /* The key in the %ENV hash is in the syntax of file passed as the argument
3224 * usually this is in UNIX format, but sometimes in VMS format, which
3225 * can result in a module being pulled in more than once.
3226 * To prevent this, the key must be stored in UNIX format if the VMS
3227 * name can be translated to UNIX.
3228 */
3229 if ((unixname = tounixspec(name, NULL)) != NULL) {
3230 unixlen = strlen(unixname);
3231 vms_unixname = 1;
3232 }
3233 else
3234#endif
3235 {
3236 /* if not VMS or VMS name can not be translated to UNIX, pass it
3237 * through.
3238 */
3239 unixname = (char *) name;
3240 unixlen = len;
3241 }
44f8325f 3242 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM
3243 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3244 unixname, unixlen, 0);
44f8325f
AL
3245 if ( svp ) {
3246 if (*svp != &PL_sv_undef)
3247 RETPUSHYES;
3248 else
087b5369
RD
3249 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3250 "Compilation failed in require", unixname);
44f8325f 3251 }
4d8b06f1 3252 }
a0d0e21e
LW
3253
3254 /* prepare to compile file */
3255
be4b629d 3256 if (path_is_absolute(name)) {
46fc3d4c 3257 tryname = name;
0786552a 3258 tryrsfp = doopen_pm(name, len);
bf4acbe4 3259 }
67627c52
JH
3260#ifdef MACOS_TRADITIONAL
3261 if (!tryrsfp) {
3262 char newname[256];
3263
3264 MacPerl_CanonDir(name, newname, 1);
3265 if (path_is_absolute(newname)) {
3266 tryname = newname;
0786552a 3267 tryrsfp = doopen_pm(newname, strlen(newname));
67627c52
JH
3268 }
3269 }
3270#endif
be4b629d 3271 if (!tryrsfp) {
44f8325f 3272 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3273 I32 i;
748a9306 3274#ifdef VMS
4492be7a 3275 if (vms_unixname)
46fc3d4c
PP
3276#endif
3277 {
d0328fd7 3278 namesv = newSV_type(SVt_PV);
46fc3d4c 3279 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3280 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3281
c38a6530
RD
3282 if (SvTIED_mg((SV*)ar, PERL_MAGIC_tied))
3283 mg_get(dirsv);
bbed91b5
KF
3284 if (SvROK(dirsv)) {
3285 int count;
a3b58a99 3286 SV **svp;
bbed91b5
KF
3287 SV *loader = dirsv;
3288
e14e2dc8
NC
3289 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3290 && !sv_isobject(loader))
3291 {
bbed91b5
KF
3292 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3293 }
3294
b900a521 3295 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3296 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3297 tryname = SvPVX_const(namesv);
c445ea15 3298 tryrsfp = NULL;
bbed91b5
KF
3299
3300 ENTER;
3301 SAVETMPS;
3302 EXTEND(SP, 2);
3303
3304 PUSHMARK(SP);
3305 PUSHs(dirsv);
3306 PUSHs(sv);
3307 PUTBACK;
e982885c
NC
3308 if (sv_isobject(loader))
3309 count = call_method("INC", G_ARRAY);
3310 else
3311 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3312 SPAGAIN;
3313
a3b58a99
RGS
3314 /* Adjust file name if the hook has set an %INC entry */
3315 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3316 if (svp)
3317 tryname = SvPVX_const(*svp);
3318
bbed91b5
KF
3319 if (count > 0) {
3320 int i = 0;
3321 SV *arg;
3322
3323 SP -= count - 1;
3324 arg = SP[i++];
3325
34113e50
NC
3326 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3327 && !isGV_with_GP(SvRV(arg))) {
3328 filter_cache = SvRV(arg);
74c765eb 3329 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3330
3331 if (i < count) {
3332 arg = SP[i++];
3333 }
3334 }
3335
bbed91b5
KF
3336 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3337 arg = SvRV(arg);
3338 }
3339
3340 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3341 IO * const io = GvIO((GV *)arg);
bbed91b5
KF
3342
3343 ++filter_has_file;
3344
3345 if (io) {
3346 tryrsfp = IoIFP(io);
0f7de14d
NC
3347 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3348 PerlIO_close(IoOFP(io));
bbed91b5 3349 }
0f7de14d
NC
3350 IoIFP(io) = NULL;
3351 IoOFP(io) = NULL;
bbed91b5
KF
3352 }
3353
3354 if (i < count) {
3355 arg = SP[i++];
3356 }
3357 }
3358
3359 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3360 filter_sub = arg;
74c765eb 3361 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF
3362
3363 if (i < count) {
3364 filter_state = SP[i];
b37c2d43 3365 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3366 }
34113e50 3367 }
bbed91b5 3368
34113e50
NC
3369 if (!tryrsfp && (filter_cache || filter_sub)) {
3370 tryrsfp = PerlIO_open(BIT_BUCKET,
3371 PERL_SCRIPT_MODE);
bbed91b5 3372 }
1d06aecd 3373 SP--;
bbed91b5
KF
3374 }
3375
3376 PUTBACK;
3377 FREETMPS;
3378 LEAVE;
3379
3380 if (tryrsfp) {
89ccab8c 3381 hook_sv = dirsv;
bbed91b5
KF
3382 break;
3383 }
3384
3385 filter_has_file = 0;
34113e50
NC
3386 if (filter_cache) {
3387 SvREFCNT_dec(filter_cache);
3388 filter_cache = NULL;
3389 }
bbed91b5
KF
3390 if (filter_state) {
3391 SvREFCNT_dec(filter_state);
c445ea15 3392 filter_state = NULL;
bbed91b5
KF
3393 }
3394 if (filter_sub) {
3395 SvREFCNT_dec(filter_sub);
c445ea15 3396 filter_sub = NULL;
bbed91b5
KF
3397 }
3398 }
3399 else {
be4b629d
CN
3400 if (!path_is_absolute(name)
3401#ifdef MACOS_TRADITIONAL
3402 /* We consider paths of the form :a:b ambiguous and interpret them first
3403 as global then as local
3404 */
3405 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3406#endif
3407 ) {
b640a14a
NC
3408 const char *dir;
3409 STRLEN dirlen;
3410
3411 if (SvOK(dirsv)) {
3412 dir = SvPV_const(dirsv, dirlen);
3413 } else {
3414 dir = "";
3415 dirlen = 0;
3416 }
3417
bf4acbe4 3418#ifdef MACOS_TRADITIONAL
67627c52
JH
3419 char buf1[256];
3420 char buf2[256];
3421
3422 MacPerl_CanonDir(name, buf2, 1);
3423 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));