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[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW		 1/* pp_ctl.c
2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
a0d0e21e
LW		 5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 */
19
166f8a29
DM		 20/* This file contains control-oriented pp ("push/pop") functions that
21 * execute the opcodes that make up a perl program. A typical pp function
22 * expects to find its arguments on the stack, and usually pushes its
23 * results onto the stack, hence the 'pp' terminology. Each OP structure
24 * contains a pointer to the relevant pp_foo() function.
25 *
26 * Control-oriented means things like pp_enteriter() and pp_next(), which
27 * alter the flow of control of the program.
28 */
29
30
a0d0e21e 31#include "EXTERN.h"
864dbfa3 32#define PERL_IN_PP_CTL_C
a0d0e21e
LW		 33#include "perl.h"
34
35#ifndef WORD_ALIGN
dea28490 36#define WORD_ALIGN sizeof(U32)
a0d0e21e
LW		 37#endif
38
54310121 39#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 40
94fcd414
NC		 41#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
42
a0d0e21e
LW		 43PP(pp_wantarray)
44{
97aff369 45 dVAR;
39644a26 46 dSP;
a0d0e21e
LW		 47 I32 cxix;
48 EXTEND(SP, 1);
49
50 cxix = dopoptosub(cxstack_ix);
51 if (cxix < 0)
52 RETPUSHUNDEF;
53
54310121 54 switch (cxstack[cxix].blk_gimme) {
55 case G_ARRAY:
a0d0e21e 56 RETPUSHYES;
54310121 57 case G_SCALAR:
a0d0e21e 58 RETPUSHNO;
54310121 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 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 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 358 }
359}
360
361void
864dbfa3 362Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 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 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 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 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 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
WL		 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
WL		 764 case FF_LINESNGL:
765 chopspace = 0;
766 oneline = TRUE;
767 goto ff_line;
a0d0e21e 768 case FF_LINEGLOB:
a1b95068
WL		 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
WL		 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
WL		 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
WL		 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 1058 else if (gimme == G_ARRAY)
1059 SP += items;
a0d0e21e
LW		 1060 RETURN;
1061 }
1062 else {
1063 SV *src;
1064
1065 ENTER; /* enter inner scope */
7766f137 1066 SAVEVPTR(PL_curpm);
a0d0e21e 1067
544f3153 1068 /* set $_ to the new source item */
3280af22 1069 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1070 SvTEMP_off(src);
59f00321
RGS		 1071 if (PL_op->op_private & OPpGREP_LEX)
1072 PAD_SVl(PL_op->op_targ) = src;
1073 else
1074 DEFSV = src;
a0d0e21e
LW		 1075
1076 RETURNOP(cLOGOP->op_other);
1077 }
1078}
1079
a0d0e21e
LW		 1080/* Range stuff. */
1081
1082PP(pp_range)
1083{
97aff369 1084 dVAR;
a0d0e21e 1085 if (GIMME == G_ARRAY)
1a67a97c 1086 return NORMAL;
538573f7 1087 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1088 return cLOGOP->op_other;
538573f7 1089 else
1a67a97c 1090 return NORMAL;
a0d0e21e
LW		 1091}
1092
1093PP(pp_flip)
1094{
97aff369 1095 dVAR;
39644a26 1096 dSP;
a0d0e21e
LW		 1097
1098 if (GIMME == G_ARRAY) {
1a67a97c 1099 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1100 }
1101 else {
1102 dTOPss;
44f8325f 1103 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1104 int flip = 0;
790090df 1105
bfed75c6 1106 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST		 1107 if (GvIO(PL_last_in_gv)) {
1108 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1109 }
1110 else {
fafc274c 1111 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL		 1112 if (gv && GvSV(gv))
1113 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1114 }
bfed75c6
AL		 1115 } else {
1116 flip = SvTRUE(sv);
1117 }
1118 if (flip) {
a0d0e21e 1119 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1120 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1121 sv_setiv(targ, 1);
3e3baf6d 1122 SETs(targ);
a0d0e21e
LW		 1123 RETURN;
1124 }
1125 else {
1126 sv_setiv(targ, 0);
924508f0 1127 SP--;
1a67a97c 1128 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1129 }
1130 }
c69006e4 1131 sv_setpvn(TARG, "", 0);
a0d0e21e
LW		 1132 SETs(targ);
1133 RETURN;
1134 }
1135}
1136
8e9bbdb9
RGS		 1137/* This code tries to decide if "$left .. $right" should use the
1138 magical string increment, or if the range is numeric (we make
1139 an exception for .."0" [#18165]). AMS 20021031. */
1140
1141#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS		 1142 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1143 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1144 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1145 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1146 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1147
a0d0e21e
LW		 1148PP(pp_flop)
1149{
97aff369 1150 dVAR; dSP;
a0d0e21e
LW		 1151
1152 if (GIMME == G_ARRAY) {
1153 dPOPPOPssrl;
86cb7173 1154
5b295bef
RD		 1155 SvGETMAGIC(left);
1156 SvGETMAGIC(right);
a0d0e21e 1157
8e9bbdb9 1158 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL		 1159 register IV i, j;
1160 IV max;
4fe3f0fa
MHM		 1161 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1162 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1163 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW		 1164 i = SvIV(left);
1165 max = SvIV(right);
bbce6d69 1166 if (max >= i) {
c1ab3db2
AK		 1167 j = max - i + 1;
1168 EXTEND_MORTAL(j);
1169 EXTEND(SP, j);
bbce6d69 1170 }
c1ab3db2
AK		 1171 else
1172 j = 0;
1173 while (j--) {
901017d6 1174 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW		 1175 PUSHs(sv);
1176 }
1177 }
1178 else {
44f8325f 1179 SV * const final = sv_mortalcopy(right);
13c5b33c 1180 STRLEN len;
823a54a3 1181 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1182
901017d6 1183 SV *sv = sv_mortalcopy(left);
13c5b33c 1184 SvPV_force_nolen(sv);
89ea2908 1185 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1186 XPUSHs(sv);
b15aece3 1187 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1188 break;
a0d0e21e
LW		 1189 sv = sv_2mortal(newSVsv(sv));
1190 sv_inc(sv);
1191 }
a0d0e21e
LW		 1192 }
1193 }
1194 else {
1195 dTOPss;
901017d6 1196 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1197 int flop = 0;
a0d0e21e 1198 sv_inc(targ);
4e3399f9
YST		 1199
1200 if (PL_op->op_private & OPpFLIP_LINENUM) {
1201 if (GvIO(PL_last_in_gv)) {
1202 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1203 }
1204 else {
fafc274c 1205 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST		 1206 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1207 }
1208 }
1209 else {
1210 flop = SvTRUE(sv);
1211 }
1212
1213 if (flop) {
a0d0e21e 1214 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1215 sv_catpvs(targ, "E0");
a0d0e21e
LW		 1216 }
1217 SETs(targ);
1218 }
1219
1220 RETURN;
1221}
1222
1223/* Control. */
1224
27da23d5 1225static const char * const context_name[] = {
515afda2
NC		 1226 "pseudo-block",
1227 "subroutine",
1228 "eval",
1229 "loop",
1230 "substitution",
1231 "block",
0d863452
RH		 1232 "format",
1233 "given",
1234 "when"
515afda2
NC		 1235};
1236
76e3520e 1237STATIC I32
06b5626a 1238S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1239{
97aff369 1240 dVAR;
a0d0e21e 1241 register I32 i;
a0d0e21e
LW		 1242
1243 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1244 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1245 switch (CxTYPE(cx)) {
a0d0e21e 1246 case CXt_SUBST:
a0d0e21e 1247 case CXt_SUB:
7766f137 1248 case CXt_FORMAT:
a0d0e21e 1249 case CXt_EVAL:
0a753a76 1250 case CXt_NULL:
0d863452
RH		 1251 case CXt_GIVEN:
1252 case CXt_WHEN:
e476b1b5 1253 if (ckWARN(WARN_EXITING))
515afda2
NC		 1254 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1255 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1256 if (CxTYPE(cx) == CXt_NULL)
1257 return -1;
1258 break;
c6fdafd0 1259 case CXt_LOOP_LAZYIV:
d01136d6 1260 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1261 case CXt_LOOP_FOR:
1262 case CXt_LOOP_PLAIN:
a61a7064 1263 if ( !CxLABEL(cx) || strNE(label, CxLABEL(cx)) ) {
cea2e8a9 1264 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
a61a7064 1265 (long)i, CxLABEL(cx)));
a0d0e21e
LW		 1266 continue;
1267 }
cea2e8a9 1268 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW		 1269 return i;
1270 }
1271 }
1272 return i;
1273}
1274
0d863452
RH		 1275
1276
e50aee73 1277I32
864dbfa3 1278Perl_dowantarray(pTHX)
e50aee73 1279{
97aff369 1280 dVAR;
f54cb97a 1281 const I32 gimme = block_gimme();
54310121 1282 return (gimme == G_VOID) ? G_SCALAR : gimme;
1283}
1284
1285I32
864dbfa3 1286Perl_block_gimme(pTHX)
54310121 1287{
97aff369 1288 dVAR;
06b5626a 1289 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1290 if (cxix < 0)
46fc3d4c 1291 return G_VOID;
e50aee73 1292
54310121 1293 switch (cxstack[cxix].blk_gimme) {
d2719217
GS		 1294 case G_VOID:
1295 return G_VOID;
54310121 1296 case G_SCALAR:
e50aee73 1297 return G_SCALAR;
54310121 1298 case G_ARRAY:
1299 return G_ARRAY;
1300 default:
cea2e8a9 1301 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS		 1302 /* NOTREACHED */
1303 return 0;
54310121 1304 }
e50aee73
AD		 1305}
1306
78f9721b
SM		 1307I32
1308Perl_is_lvalue_sub(pTHX)
1309{
97aff369 1310 dVAR;
06b5626a 1311 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM		 1312 assert(cxix >= 0); /* We should only be called from inside subs */
1313
bafb2adc
NC		 1314 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1315 return CxLVAL(cxstack + cxix);
78f9721b
SM		 1316 else
1317 return 0;
1318}
1319
76e3520e 1320STATIC I32
901017d6 1321S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1322{
97aff369 1323 dVAR;
a0d0e21e 1324 I32 i;
a0d0e21e 1325 for (i = startingblock; i >= 0; i--) {
901017d6 1326 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1327 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1328 default:
1329 continue;
1330 case CXt_EVAL:
1331 case CXt_SUB:
7766f137 1332 case CXt_FORMAT:
cea2e8a9 1333 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW		 1334 return i;
1335 }
1336 }
1337 return i;
1338}
1339
76e3520e 1340STATIC I32
cea2e8a9 1341S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1342{
97aff369 1343 dVAR;
a0d0e21e 1344 I32 i;
a0d0e21e 1345 for (i = startingblock; i >= 0; i--) {
06b5626a 1346 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1347 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1348 default:
1349 continue;
1350 case CXt_EVAL:
cea2e8a9 1351 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW		 1352 return i;
1353 }
1354 }
1355 return i;
1356}
1357
76e3520e 1358STATIC I32
cea2e8a9 1359S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1360{
97aff369 1361 dVAR;
a0d0e21e 1362 I32 i;
a0d0e21e 1363 for (i = startingblock; i >= 0; i--) {
901017d6 1364 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1365 switch (CxTYPE(cx)) {
a0d0e21e 1366 case CXt_SUBST:
a0d0e21e 1367 case CXt_SUB:
7766f137 1368 case CXt_FORMAT:
a0d0e21e 1369 case CXt_EVAL:
0a753a76 1370 case CXt_NULL:
e476b1b5 1371 if (ckWARN(WARN_EXITING))
515afda2
NC		 1372 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1373 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1374 if ((CxTYPE(cx)) == CXt_NULL)
1375 return -1;
1376 break;
c6fdafd0 1377 case CXt_LOOP_LAZYIV:
d01136d6 1378 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1379 case CXt_LOOP_FOR:
1380 case CXt_LOOP_PLAIN:
cea2e8a9 1381 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW		 1382 return i;
1383 }
1384 }
1385 return i;
1386}
1387
0d863452
RH		 1388STATIC I32
1389S_dopoptogiven(pTHX_ I32 startingblock)
1390{
97aff369 1391 dVAR;
0d863452
RH		 1392 I32 i;
1393 for (i = startingblock; i >= 0; i--) {
1394 register const PERL_CONTEXT *cx = &cxstack[i];
1395 switch (CxTYPE(cx)) {
1396 default:
1397 continue;
1398 case CXt_GIVEN:
1399 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1400 return i;
3b719c58
NC		 1401 case CXt_LOOP_PLAIN:
1402 assert(!CxFOREACHDEF(cx));
1403 break;
c6fdafd0 1404 case CXt_LOOP_LAZYIV:
d01136d6 1405 case CXt_LOOP_LAZYSV:
3b719c58 1406 case CXt_LOOP_FOR:
0d863452
RH		 1407 if (CxFOREACHDEF(cx)) {
1408 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1409 return i;
1410 }
1411 }
1412 }
1413 return i;
1414}
1415
1416STATIC I32
1417S_dopoptowhen(pTHX_ I32 startingblock)
1418{
97aff369 1419 dVAR;
0d863452
RH		 1420 I32 i;
1421 for (i = startingblock; i >= 0; i--) {
1422 register const PERL_CONTEXT *cx = &cxstack[i];
1423 switch (CxTYPE(cx)) {
1424 default:
1425 continue;
1426 case CXt_WHEN:
1427 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1428 return i;
1429 }
1430 }
1431 return i;
1432}
1433
a0d0e21e 1434void
864dbfa3 1435Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1436{
97aff369 1437 dVAR;
a0d0e21e
LW		 1438 I32 optype;
1439
1440 while (cxstack_ix > cxix) {
b0d9ce38 1441 SV *sv;
06b5626a 1442 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1443 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1444 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1445 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1446 switch (CxTYPE(cx)) {
c90c0ff4 1447 case CXt_SUBST:
1448 POPSUBST(cx);
1449 continue; /* not break */
a0d0e21e 1450 case CXt_SUB:
b0d9ce38
GS		 1451 POPSUB(cx,sv);
1452 LEAVESUB(sv);
a0d0e21e
LW		 1453 break;
1454 case CXt_EVAL:
1455 POPEVAL(cx);
1456 break;
c6fdafd0 1457 case CXt_LOOP_LAZYIV:
d01136d6 1458 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1459 case CXt_LOOP_FOR:
1460 case CXt_LOOP_PLAIN:
a0d0e21e
LW		 1461 POPLOOP(cx);
1462 break;
0a753a76 1463 case CXt_NULL:
a0d0e21e 1464 break;
7766f137
GS		 1465 case CXt_FORMAT:
1466 POPFORMAT(cx);
1467 break;
a0d0e21e 1468 }
c90c0ff4 1469 cxstack_ix--;
a0d0e21e 1470 }
1b6737cc 1471 PERL_UNUSED_VAR(optype);
a0d0e21e
LW		 1472}
1473
5a844595
GS		 1474void
1475Perl_qerror(pTHX_ SV *err)
1476{
97aff369 1477 dVAR;
5a844595
GS		 1478 if (PL_in_eval)
1479 sv_catsv(ERRSV, err);
1480 else if (PL_errors)
1481 sv_catsv(PL_errors, err);
1482 else
be2597df 1483 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM		 1484 if (PL_parser)
1485 ++PL_parser->error_count;
5a844595
GS		 1486}
1487
a0d0e21e 1488OP *
35a4481c 1489Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1490{
27da23d5 1491 dVAR;
87582a92 1492
3280af22 1493 if (PL_in_eval) {
a0d0e21e 1494 I32 cxix;
a0d0e21e 1495 I32 gimme;
a0d0e21e 1496
4e6ea2c3 1497 if (message) {
faef0170 1498 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1499 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1500 SV * const err = ERRSV;
c445ea15 1501 const char *e = NULL;
98eae8f5 1502 if (!SvPOK(err))
c69006e4 1503 sv_setpvn(err,"",0);
98eae8f5 1504 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1505 STRLEN len;
349d4f2f 1506 e = SvPV_const(err, len);
0510663f 1507 e += len - msglen;
98eae8f5 1508 if (*e != *message || strNE(e,message))
c445ea15 1509 e = NULL;
98eae8f5
GS		 1510 }
1511 if (!e) {
1512 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1513 sv_catpvn(err, prefix, sizeof(prefix)-1);
1514 sv_catpvn(err, message, msglen);
e476b1b5 1515 if (ckWARN(WARN_MISC)) {
504618e9 1516 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1517 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1518 }
4633a7c4 1519 }
4633a7c4 1520 }
1aa99e6b 1521 else {
06bf62c7 1522 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1523 }
4633a7c4 1524 }
4e6ea2c3 1525
5a844595
GS		 1526 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1527 && PL_curstackinfo->si_prev)
1528 {
bac4b2ad 1529 dounwind(-1);
d3acc0f7 1530 POPSTACK;
bac4b2ad 1531 }
e336de0d 1532
a0d0e21e
LW		 1533 if (cxix >= 0) {
1534 I32 optype;
35a4481c 1535 register PERL_CONTEXT *cx;
901017d6 1536 SV **newsp;
a0d0e21e
LW		 1537
1538 if (cxix < cxstack_ix)
1539 dounwind(cxix);
1540
3280af22 1541 POPBLOCK(cx,PL_curpm);
6b35e009 1542 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1543 if (!message)
349d4f2f 1544 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1545 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1546 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW		 1547 my_exit(1);
1548 }
1549 POPEVAL(cx);
1550
1551 if (gimme == G_SCALAR)
3280af22
NIS		 1552 *++newsp = &PL_sv_undef;
1553 PL_stack_sp = newsp;
a0d0e21e
LW		 1554
1555 LEAVE;
748a9306 1556
7fb6a879
GS		 1557 /* LEAVE could clobber PL_curcop (see save_re_context())
1558 * XXX it might be better to find a way to avoid messing with
1559 * PL_curcop in save_re_context() instead, but this is a more
1560 * minimal fix --GSAR */
1561 PL_curcop = cx->blk_oldcop;
1562
7a2e2cd6 1563 if (optype == OP_REQUIRE) {
44f8325f 1564 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1565 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1566 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1567 &PL_sv_undef, 0);
5a844595
GS		 1568 DIE(aTHX_ "%sCompilation failed in require",
1569 *msg ? msg : "Unknown error\n");
7a2e2cd6 1570 }
f39bc417
DM		 1571 assert(CxTYPE(cx) == CXt_EVAL);
1572 return cx->blk_eval.retop;
a0d0e21e
LW		 1573 }
1574 }
9cc2fdd3 1575 if (!message)
349d4f2f 1576 message = SvPVx_const(ERRSV, msglen);
87582a92 1577
7ff03255 1578 write_to_stderr(message, msglen);
f86702cc 1579 my_failure_exit();
1580 /* NOTREACHED */
a0d0e21e
LW		 1581 return 0;
1582}
1583
1584PP(pp_xor)
1585{
97aff369 1586 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW		 1587 if (SvTRUE(left) != SvTRUE(right))
1588 RETSETYES;
1589 else
1590 RETSETNO;
1591}
1592
a0d0e21e
LW		 1593PP(pp_caller)
1594{
97aff369 1595 dVAR;
39644a26 1596 dSP;
a0d0e21e 1597 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL		 1598 register const PERL_CONTEXT *cx;
1599 register const PERL_CONTEXT *ccstack = cxstack;
1600 const PERL_SI *top_si = PL_curstackinfo;
54310121 1601 I32 gimme;
06b5626a 1602 const char *stashname;
a0d0e21e
LW		 1603 I32 count = 0;
1604
1605 if (MAXARG)
1606 count = POPi;
27d41816 1607
a0d0e21e 1608 for (;;) {
2c375eb9
GS		 1609 /* we may be in a higher stacklevel, so dig down deeper */
1610 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1611 top_si = top_si->si_prev;
1612 ccstack = top_si->si_cxstack;
1613 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1614 }
a0d0e21e 1615 if (cxix < 0) {
27d41816
DM		 1616 if (GIMME != G_ARRAY) {
1617 EXTEND(SP, 1);
a0d0e21e 1618 RETPUSHUNDEF;
27d41816 1619 }
a0d0e21e
LW		 1620 RETURN;
1621 }
f2a7f298
DG		 1622 /* caller() should not report the automatic calls to &DB::sub */
1623 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1624 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW		 1625 count++;
1626 if (!count--)
1627 break;
2c375eb9 1628 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1629 }
2c375eb9
GS		 1630
1631 cx = &ccstack[cxix];
7766f137 1632 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1633 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1634 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1635 field below is defined for any cx. */
f2a7f298
DG		 1636 /* caller() should not report the automatic calls to &DB::sub */
1637 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1638 cx = &ccstack[dbcxix];
06a5b730 1639 }
1640
ed094faf 1641 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1642 if (GIMME != G_ARRAY) {
27d41816 1643 EXTEND(SP, 1);
ed094faf 1644 if (!stashname)
3280af22 1645 PUSHs(&PL_sv_undef);
49d8d3a1
MB		 1646 else {
1647 dTARGET;
ed094faf 1648 sv_setpv(TARG, stashname);
49d8d3a1
MB		 1649 PUSHs(TARG);
1650 }
a0d0e21e
LW		 1651 RETURN;
1652 }
a0d0e21e 1653
b3ca2e83 1654 EXTEND(SP, 11);
27d41816 1655
ed094faf 1656 if (!stashname)
3280af22 1657 PUSHs(&PL_sv_undef);
49d8d3a1 1658 else
6e449a3a
MHM		 1659 mPUSHs(newSVpv(stashname, 0));
1660 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1661 mPUSHi((I32)CopLINE(cx->blk_oldcop));
a0d0e21e
LW		 1662 if (!MAXARG)
1663 RETURN;
7766f137 1664 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1665 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1666 /* So is ccstack[dbcxix]. */
07b8c804 1667 if (isGV(cvgv)) {
561b68a9 1668 SV * const sv = newSV(0);
c445ea15 1669 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1670 mPUSHs(sv);
bf38a478 1671 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS		 1672 }
1673 else {
84bafc02 1674 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1675 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1676 }
a0d0e21e
LW		 1677 }
1678 else {
84bafc02 1679 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1680 mPUSHi(0);
a0d0e21e 1681 }
54310121 1682 gimme = (I32)cx->blk_gimme;
1683 if (gimme == G_VOID)
3280af22 1684 PUSHs(&PL_sv_undef);
54310121 1685 else
98625aca 1686 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1687 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1688 /* eval STRING */
85a64632 1689 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1690 PUSHs(cx->blk_eval.cur_text);
3280af22 1691 PUSHs(&PL_sv_no);
0f79a09d 1692 }
811a4de9 1693 /* require */
0f79a09d 1694 else if (cx->blk_eval.old_namesv) {
6e449a3a 1695 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1696 PUSHs(&PL_sv_yes);
06a5b730 1697 }
811a4de9
GS		 1698 /* eval BLOCK (try blocks have old_namesv == 0) */
1699 else {
1700 PUSHs(&PL_sv_undef);
1701 PUSHs(&PL_sv_undef);
1702 }
4633a7c4 1703 }
a682de96
GS		 1704 else {
1705 PUSHs(&PL_sv_undef);
1706 PUSHs(&PL_sv_undef);
1707 }
bafb2adc 1708 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1709 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1710 {
66a1b24b
AL		 1711 AV * const ary = cx->blk_sub.argarray;
1712 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1713
3280af22 1714 if (!PL_dbargs) {
71315bf2 1715 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1716 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1717 GvMULTI_on(tmpgv);
3ddcf04c 1718 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW		 1719 }
1720
3280af22
NIS		 1721 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1722 av_extend(PL_dbargs, AvFILLp(ary) + off);
1723 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1724 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1725 }
f3aa04c2
GS		 1726 /* XXX only hints propagated via op_private are currently
1727 * visible (others are not easily accessible, since they
1728 * use the global PL_hints) */
6e449a3a 1729 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS		 1730 {
1731 SV * mask ;
72dc9ed5 1732 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1733
ac27b0f5 1734 if (old_warnings == pWARN_NONE ||
114bafba 1735 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1736 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1737 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS		 1738 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1739 /* Get the bit mask for $warnings::Bits{all}, because
1740 * it could have been extended by warnings::register */
1741 SV **bits_all;
0bd48802 1742 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1743 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS		 1744 mask = newSVsv(*bits_all);
1745 }
1746 else {
1747 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1748 }
1749 }
e476b1b5 1750 else
72dc9ed5 1751 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1752 mPUSHs(mask);
e476b1b5 1753 }
b3ca2e83 1754
c28fe1ec 1755 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1756 sv_2mortal(newRV_noinc(
c28fe1ec
NC		 1757 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1758 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1759 : &PL_sv_undef);
a0d0e21e
LW		 1760 RETURN;
1761}
1762
a0d0e21e
LW		 1763PP(pp_reset)
1764{
97aff369 1765 dVAR;
39644a26 1766 dSP;
10edeb5d 1767 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1768 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1769 PUSHs(&PL_sv_yes);
a0d0e21e
LW		 1770 RETURN;
1771}
1772
dd2155a4
DM		 1773/* like pp_nextstate, but used instead when the debugger is active */
1774
a0d0e21e
LW		 1775PP(pp_dbstate)
1776{
27da23d5 1777 dVAR;
533c011a 1778 PL_curcop = (COP*)PL_op;
a0d0e21e 1779 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1780 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW		 1781 FREETMPS;
1782
5df8de69
DM		 1783 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1784 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1785 {
39644a26 1786 dSP;
c09156bb 1787 register PERL_CONTEXT *cx;
f54cb97a 1788 const I32 gimme = G_ARRAY;
eb160463 1789 U8 hasargs;
0bd48802
AL		 1790 GV * const gv = PL_DBgv;
1791 register CV * const cv = GvCV(gv);
a0d0e21e 1792
a0d0e21e 1793 if (!cv)
cea2e8a9 1794 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1795
aea4f609
DM		 1796 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1797 /* don't do recursive DB::DB call */
a0d0e21e 1798 return NORMAL;
748a9306 1799
4633a7c4
LW		 1800 ENTER;
1801 SAVETMPS;
1802
3280af22 1803 SAVEI32(PL_debug);
55497cff 1804 SAVESTACK_POS();
3280af22 1805 PL_debug = 0;
748a9306 1806 hasargs = 0;
924508f0 1807 SPAGAIN;
748a9306 1808
aed2304a 1809 if (CvISXSUB(cv)) {
c127bd3a
SF		 1810 CvDEPTH(cv)++;
1811 PUSHMARK(SP);
1812 (void)(*CvXSUB(cv))(aTHX_ cv);
1813 CvDEPTH(cv)--;
1814 FREETMPS;
1815 LEAVE;
1816 return NORMAL;
1817 }
1818 else {
1819 PUSHBLOCK(cx, CXt_SUB, SP);
1820 PUSHSUB_DB(cx);
1821 cx->blk_sub.retop = PL_op->op_next;
1822 CvDEPTH(cv)++;
1823 SAVECOMPPAD();
1824 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1825 RETURNOP(CvSTART(cv));
1826 }
a0d0e21e
LW		 1827 }
1828 else
1829 return NORMAL;
1830}
1831
a0d0e21e
LW		 1832PP(pp_enteriter)
1833{
27da23d5 1834 dVAR; dSP; dMARK;
c09156bb 1835 register PERL_CONTEXT *cx;
f54cb97a 1836 const I32 gimme = GIMME_V;
a0d0e21e 1837 SV **svp;
840fe433 1838 U8 cxtype = CXt_LOOP_FOR;
7766f137 1839#ifdef USE_ITHREADS
e846cb92 1840 PAD *iterdata;
7766f137 1841#endif
a0d0e21e 1842
4633a7c4
LW		 1843 ENTER;
1844 SAVETMPS;
1845
533c011a 1846 if (PL_op->op_targ) {
14f338dc
DM		 1847 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1848 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1849 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1850 SVs_PADSTALE, SVs_PADSTALE);
1851 }
09edbca0 1852 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
c3564e5c 1853#ifndef USE_ITHREADS
dd2155a4 1854 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
c3564e5c 1855#else
e846cb92 1856 iterdata = NULL;
7766f137 1857#endif
54b9620d
MB		 1858 }
1859 else {
0bd48802 1860 GV * const gv = (GV*)POPs;
7766f137 1861 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1862 SAVEGENERICSV(*svp);
561b68a9 1863 *svp = newSV(0);
7766f137 1864#ifdef USE_ITHREADS
e846cb92 1865 iterdata = (PAD*)gv;
7766f137 1866#endif
54b9620d 1867 }
4633a7c4 1868
0d863452
RH		 1869 if (PL_op->op_private & OPpITER_DEF)
1870 cxtype |= CXp_FOR_DEF;
1871
a0d0e21e
LW		 1872 ENTER;
1873
7766f137
GS		 1874 PUSHBLOCK(cx, cxtype, SP);
1875#ifdef USE_ITHREADS
e846cb92 1876 PUSHLOOP_FOR(cx, iterdata, MARK, PL_op->op_targ);
7766f137 1877#else
52d1f6fb 1878 PUSHLOOP_FOR(cx, svp, MARK, 0);
7766f137 1879#endif
533c011a 1880 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS		 1881 SV *maybe_ary = POPs;
1882 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 1883 dPOPss;
d01136d6 1884 SV * const right = maybe_ary;
984a4bea
RD		 1885 SvGETMAGIC(sv);
1886 SvGETMAGIC(right);
4fe3f0fa 1887 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 1888 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC		 1889 cx->cx_type |= CXt_LOOP_LAZYIV;
1890 /* Make sure that no-one re-orders cop.h and breaks our
1891 assumptions */
1892 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040
JH		 1893#ifdef NV_PRESERVES_UV
1894 if ((SvOK(sv) && ((SvNV(sv) < (NV)IV_MIN) ||
1895 (SvNV(sv) > (NV)IV_MAX)))
1896 ||
1897 (SvOK(right) && ((SvNV(right) > (NV)IV_MAX) ||
1898 (SvNV(right) < (NV)IV_MIN))))
1899#else
1900 if ((SvOK(sv) && ((SvNV(sv) <= (NV)IV_MIN)
1901 ||
1902 ((SvNV(sv) > 0) &&
1903 ((SvUV(sv) > (UV)IV_MAX) ||
1904 (SvNV(sv) > (NV)UV_MAX)))))
1905 ||
1906 (SvOK(right) && ((SvNV(right) <= (NV)IV_MIN)
1907 ||
1908 ((SvNV(right) > 0) &&
1909 ((SvUV(right) > (UV)IV_MAX) ||
1910 (SvNV(right) > (NV)UV_MAX))))))
1911#endif
076d9a11 1912 DIE(aTHX_ "Range iterator outside integer range");
d01136d6
BS		 1913 cx->blk_loop.state_u.lazyiv.cur = SvIV(sv);
1914 cx->blk_loop.state_u.lazyiv.end = SvIV(right);
d4665a05
DM		 1915#ifdef DEBUGGING
1916 /* for correct -Dstv display */
1917 cx->blk_oldsp = sp - PL_stack_base;
1918#endif
89ea2908 1919 }
3f63a782 1920 else {
d01136d6
BS		 1921 cx->cx_type &= ~CXTYPEMASK;
1922 cx->cx_type |= CXt_LOOP_LAZYSV;
1923 /* Make sure that no-one re-orders cop.h and breaks our
1924 assumptions */
1925 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
1926 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
1927 cx->blk_loop.state_u.lazysv.end = right;
1928 SvREFCNT_inc(right);
1929 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC		 1930 /* This will do the upgrade to SVt_PV, and warn if the value
1931 is uninitialised. */
10516c54 1932 (void) SvPV_nolen_const(right);
267cc4a8
NC		 1933 /* Doing this avoids a check every time in pp_iter in pp_hot.c
1934 to replace !SvOK() with a pointer to "". */
1935 if (!SvOK(right)) {
1936 SvREFCNT_dec(right);
d01136d6 1937 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 1938 }
3f63a782 1939 }
89ea2908 1940 }
d01136d6
BS		 1941 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
1942 cx->blk_loop.state_u.ary.ary = (AV*)maybe_ary;
1943 SvREFCNT_inc(maybe_ary);
1944 cx->blk_loop.state_u.ary.ix =
1945 (PL_op->op_private & OPpITER_REVERSED) ?
1946 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
1947 -1;
ef3e5ea9 1948 }
89ea2908 1949 }
d01136d6
BS		 1950 else { /* iterating over items on the stack */
1951 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 1952 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 1953 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC		 1954 }
1955 else {
d01136d6 1956 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 1957 }
4633a7c4 1958 }
a0d0e21e
LW		 1959
1960 RETURN;
1961}
1962
1963PP(pp_enterloop)
1964{
27da23d5 1965 dVAR; dSP;
c09156bb 1966 register PERL_CONTEXT *cx;
f54cb97a 1967 const I32 gimme = GIMME_V;
a0d0e21e
LW		 1968
1969 ENTER;
1970 SAVETMPS;
1971 ENTER;
1972
3b719c58
NC		 1973 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
1974 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW		 1975
1976 RETURN;
1977}
1978
1979PP(pp_leaveloop)
1980{
27da23d5 1981 dVAR; dSP;
c09156bb 1982 register PERL_CONTEXT *cx;
a0d0e21e
LW		 1983 I32 gimme;
1984 SV **newsp;
1985 PMOP *newpm;
1986 SV **mark;
1987
1988 POPBLOCK(cx,newpm);
3b719c58 1989 assert(CxTYPE_is_LOOP(cx));
4fdae800 1990 mark = newsp;
a8bba7fa 1991 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1992
a1f49e72 1993 TAINT_NOT;
54310121 1994 if (gimme == G_VOID)
6f207bd3 1995 NOOP;
54310121 1996 else if (gimme == G_SCALAR) {
1997 if (mark < SP)
1998 *++newsp = sv_mortalcopy(*SP);
1999 else
3280af22 2000 *++newsp = &PL_sv_undef;
a0d0e21e
LW		 2001 }
2002 else {
a1f49e72 2003 while (mark < SP) {
a0d0e21e 2004 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS		 2005 TAINT_NOT; /* Each item is independent */
2006 }
a0d0e21e 2007 }
f86702cc 2008 SP = newsp;
2009 PUTBACK;
2010
a8bba7fa 2011 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2012 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2013
a0d0e21e
LW		 2014 LEAVE;
2015 LEAVE;
2016
f86702cc 2017 return NORMAL;
a0d0e21e
LW		 2018}
2019
2020PP(pp_return)
2021{
27da23d5 2022 dVAR; dSP; dMARK;
c09156bb 2023 register PERL_CONTEXT *cx;
f86702cc 2024 bool popsub2 = FALSE;
b45de488 2025 bool clear_errsv = FALSE;
a0d0e21e
LW		 2026 I32 gimme;
2027 SV **newsp;
2028 PMOP *newpm;
2029 I32 optype = 0;
b0d9ce38 2030 SV *sv;
f39bc417 2031 OP *retop;
a0d0e21e 2032
0bd48802
AL		 2033 const I32 cxix = dopoptosub(cxstack_ix);
2034
9850bf21
RH		 2035 if (cxix < 0) {
2036 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2037 * sort block, which is a CXt_NULL
2038 * not a CXt_SUB */
2039 dounwind(0);
d7507f74
RH		 2040 PL_stack_base[1] = *PL_stack_sp;
2041 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW		 2042 return 0;
2043 }
9850bf21
RH		 2044 else
2045 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2046 }
a0d0e21e
LW		 2047 if (cxix < cxstack_ix)
2048 dounwind(cxix);
2049
d7507f74
RH		 2050 if (CxMULTICALL(&cxstack[cxix])) {
2051 gimme = cxstack[cxix].blk_gimme;
2052 if (gimme == G_VOID)
2053 PL_stack_sp = PL_stack_base;
2054 else if (gimme == G_SCALAR) {
2055 PL_stack_base[1] = *PL_stack_sp;
2056 PL_stack_sp = PL_stack_base + 1;
2057 }
9850bf21 2058 return 0;
d7507f74 2059 }
9850bf21 2060
a0d0e21e 2061 POPBLOCK(cx,newpm);
6b35e009 2062 switch (CxTYPE(cx)) {
a0d0e21e 2063 case CXt_SUB:
f86702cc 2064 popsub2 = TRUE;
f39bc417 2065 retop = cx->blk_sub.retop;
5dd42e15 2066 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW		 2067 break;
2068 case CXt_EVAL:
b45de488
GS		 2069 if (!(PL_in_eval & EVAL_KEEPERR))
2070 clear_errsv = TRUE;
a0d0e21e 2071 POPEVAL(cx);
f39bc417 2072 retop = cx->blk_eval.retop;
1d76a5c3
GS		 2073 if (CxTRYBLOCK(cx))
2074 break;
067f92a0 2075 lex_end();
748a9306
LW		 2076 if (optype == OP_REQUIRE &&
2077 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2078 {
54310121 2079 /* Unassume the success we assumed earlier. */
901017d6 2080 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2081 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2082 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2083 }
a0d0e21e 2084 break;
7766f137
GS		 2085 case CXt_FORMAT:
2086 POPFORMAT(cx);
f39bc417 2087 retop = cx->blk_sub.retop;
7766f137 2088 break;
a0d0e21e 2089 default:
cea2e8a9 2090 DIE(aTHX_ "panic: return");
a0d0e21e
LW		 2091 }
2092
a1f49e72 2093 TAINT_NOT;
a0d0e21e 2094 if (gimme == G_SCALAR) {
a29cdaf0
IZ		 2095 if (MARK < SP) {
2096 if (popsub2) {
a8bba7fa 2097 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ		 2098 if (SvTEMP(TOPs)) {
2099 *++newsp = SvREFCNT_inc(*SP);
2100 FREETMPS;
2101 sv_2mortal(*newsp);
959e3673
GS		 2102 }
2103 else {
2104 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2105 FREETMPS;
959e3673
GS		 2106 *++newsp = sv_mortalcopy(sv);
2107 SvREFCNT_dec(sv);
a29cdaf0 2108 }
959e3673
GS		 2109 }
2110 else
a29cdaf0 2111 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS		 2112 }
2113 else
a29cdaf0 2114 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2115 }
2116 else
3280af22 2117 *++newsp = &PL_sv_undef;
a0d0e21e 2118 }
54310121 2119 else if (gimme == G_ARRAY) {
a1f49e72 2120 while (++MARK <= SP) {
f86702cc 2121 *++newsp = (popsub2 && SvTEMP(*MARK))
2122 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2123 TAINT_NOT; /* Each item is independent */
2124 }
a0d0e21e 2125 }
3280af22 2126 PL_stack_sp = newsp;
a0d0e21e 2127
5dd42e15 2128 LEAVE;
f86702cc 2129 /* Stack values are safe: */
2130 if (popsub2) {
5dd42e15 2131 cxstack_ix--;
b0d9ce38 2132 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2133 }
b0d9ce38 2134 else
c445ea15 2135 sv = NULL;
3280af22 2136 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2137
b0d9ce38 2138 LEAVESUB(sv);
b45de488 2139 if (clear_errsv)
c69006e4 2140 sv_setpvn(ERRSV,"",0);
f39bc417 2141 return retop;
a0d0e21e
LW		 2142}
2143
2144PP(pp_last)
2145{
27da23d5 2146 dVAR; dSP;
a0d0e21e 2147 I32 cxix;
c09156bb 2148 register PERL_CONTEXT *cx;
f86702cc 2149 I32 pop2 = 0;
a0d0e21e 2150 I32 gimme;
8772537c 2151 I32 optype;
a0d0e21e
LW		 2152 OP *nextop;
2153 SV **newsp;
2154 PMOP *newpm;
a8bba7fa 2155 SV **mark;
c445ea15 2156 SV *sv = NULL;
9d4ba2ae 2157
a0d0e21e 2158
533c011a 2159 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2160 cxix = dopoptoloop(cxstack_ix);
2161 if (cxix < 0)
a651a37d 2162 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW		 2163 }
2164 else {
2165 cxix = dopoptolabel(cPVOP->op_pv);
2166 if (cxix < 0)
cea2e8a9 2167 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2168 }
2169 if (cxix < cxstack_ix)
2170 dounwind(cxix);
2171
2172 POPBLOCK(cx,newpm);
5dd42e15 2173 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2174 mark = newsp;
6b35e009 2175 switch (CxTYPE(cx)) {
c6fdafd0 2176 case CXt_LOOP_LAZYIV:
d01136d6 2177 case CXt_LOOP_LAZYSV:
3b719c58
NC		 2178 case CXt_LOOP_FOR:
2179 case CXt_LOOP_PLAIN:
2180 pop2 = CxTYPE(cx);
a8bba7fa 2181 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2182 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2183 break;
f86702cc 2184 case CXt_SUB:
f86702cc 2185 pop2 = CXt_SUB;
f39bc417 2186 nextop = cx->blk_sub.retop;
a0d0e21e 2187 break;
f86702cc 2188 case CXt_EVAL:
2189 POPEVAL(cx);
f39bc417 2190 nextop = cx->blk_eval.retop;
a0d0e21e 2191 break;
7766f137
GS		 2192 case CXt_FORMAT:
2193 POPFORMAT(cx);
f39bc417 2194 nextop = cx->blk_sub.retop;
7766f137 2195 break;
a0d0e21e 2196 default:
cea2e8a9 2197 DIE(aTHX_ "panic: last");
a0d0e21e
LW		 2198 }
2199
a1f49e72 2200 TAINT_NOT;
a0d0e21e 2201 if (gimme == G_SCALAR) {
f86702cc 2202 if (MARK < SP)
2203 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2204 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2205 else
3280af22 2206 *++newsp = &PL_sv_undef;
a0d0e21e 2207 }
54310121 2208 else if (gimme == G_ARRAY) {
a1f49e72 2209 while (++MARK <= SP) {
f86702cc 2210 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2211 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2212 TAINT_NOT; /* Each item is independent */
2213 }
f86702cc 2214 }
2215 SP = newsp;
2216 PUTBACK;
2217
5dd42e15
DM		 2218 LEAVE;
2219 cxstack_ix--;
f86702cc 2220 /* Stack values are safe: */
2221 switch (pop2) {
c6fdafd0 2222 case CXt_LOOP_LAZYIV:
3b719c58 2223 case CXt_LOOP_PLAIN:
d01136d6 2224 case CXt_LOOP_LAZYSV:
3b719c58 2225 case CXt_LOOP_FOR:
a8bba7fa 2226 POPLOOP(cx); /* release loop vars ... */
4fdae800 2227 LEAVE;
f86702cc 2228 break;
2229 case CXt_SUB:
b0d9ce38 2230 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2231 break;
a0d0e21e 2232 }
3280af22 2233 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2234
b0d9ce38 2235 LEAVESUB(sv);
9d4ba2ae
AL		 2236 PERL_UNUSED_VAR(optype);
2237 PERL_UNUSED_VAR(gimme);
f86702cc 2238 return nextop;
a0d0e21e
LW		 2239}
2240
2241PP(pp_next)
2242{
27da23d5 2243 dVAR;
a0d0e21e 2244 I32 cxix;
c09156bb 2245 register PERL_CONTEXT *cx;
85538317 2246 I32 inner;
a0d0e21e 2247
533c011a 2248 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2249 cxix = dopoptoloop(cxstack_ix);
2250 if (cxix < 0)
a651a37d 2251 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW		 2252 }
2253 else {
2254 cxix = dopoptolabel(cPVOP->op_pv);
2255 if (cxix < 0)
cea2e8a9 2256 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2257 }
2258 if (cxix < cxstack_ix)
2259 dounwind(cxix);
2260
85538317
GS		 2261 /* clear off anything above the scope we're re-entering, but
2262 * save the rest until after a possible continue block */
2263 inner = PL_scopestack_ix;
1ba6ee2b 2264 TOPBLOCK(cx);
85538317
GS		 2265 if (PL_scopestack_ix < inner)
2266 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2267 PL_curcop = cx->blk_oldcop;
022eaa24 2268 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW		 2269}
2270
2271PP(pp_redo)
2272{
27da23d5 2273 dVAR;
a0d0e21e 2274 I32 cxix;
c09156bb 2275 register PERL_CONTEXT *cx;
a0d0e21e 2276 I32 oldsave;
a034e688 2277 OP* redo_op;
a0d0e21e 2278
533c011a 2279 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2280 cxix = dopoptoloop(cxstack_ix);
2281 if (cxix < 0)
a651a37d 2282 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW		 2283 }
2284 else {
2285 cxix = dopoptolabel(cPVOP->op_pv);
2286 if (cxix < 0)
cea2e8a9 2287 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2288 }
2289 if (cxix < cxstack_ix)
2290 dounwind(cxix);
2291
022eaa24 2292 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM		 2293 if (redo_op->op_type == OP_ENTER) {
2294 /* pop one less context to avoid $x being freed in while (my $x..) */
2295 cxstack_ix++;
2296 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2297 redo_op = redo_op->op_next;
2298 }
2299
a0d0e21e 2300 TOPBLOCK(cx);
3280af22 2301 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2302 LEAVE_SCOPE(oldsave);
936c78b5 2303 FREETMPS;
3a1b2b9e 2304 PL_curcop = cx->blk_oldcop;
a034e688 2305 return redo_op;
a0d0e21e
LW		 2306}
2307
0824fdcb 2308STATIC OP *
bfed75c6 2309S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2310{
97aff369 2311 dVAR;
a0d0e21e 2312 OP **ops = opstack;
bfed75c6 2313 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2314
fc36a67e 2315 if (ops >= oplimit)
cea2e8a9 2316 Perl_croak(aTHX_ too_deep);
11343788
MB		 2317 if (o->op_type == OP_LEAVE ||
2318 o->op_type == OP_SCOPE ||
2319 o->op_type == OP_LEAVELOOP ||
33d34e4c 2320 o->op_type == OP_LEAVESUB ||
11343788 2321 o->op_type == OP_LEAVETRY)
fc36a67e 2322 {
5dc0d613 2323 *ops++ = cUNOPo->op_first;
fc36a67e 2324 if (ops >= oplimit)
cea2e8a9 2325 Perl_croak(aTHX_ too_deep);
fc36a67e 2326 }
c4aa4e48 2327 *ops = 0;
11343788 2328 if (o->op_flags & OPf_KIDS) {
aec46f14 2329 OP *kid;
a0d0e21e 2330 /* First try all the kids at this level, since that's likeliest. */
11343788 2331 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS		 2332 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2333 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW		 2334 return kid;
2335 }
11343788 2336 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2337 if (kid == PL_lastgotoprobe)
a0d0e21e 2338 continue;
ed8d0fe2
SM		 2339 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2340 if (ops == opstack)
2341 *ops++ = kid;
2342 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2343 ops[-1]->op_type == OP_DBSTATE)
2344 ops[-1] = kid;
2345 else
2346 *ops++ = kid;
2347 }
155aba94 2348 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2349 return o;
a0d0e21e
LW		 2350 }
2351 }
c4aa4e48 2352 *ops = 0;
a0d0e21e
LW		 2353 return 0;
2354}
2355
a0d0e21e
LW		 2356PP(pp_goto)
2357{
27da23d5 2358 dVAR; dSP;
cbbf8932 2359 OP *retop = NULL;
a0d0e21e 2360 I32 ix;
c09156bb 2361 register PERL_CONTEXT *cx;
fc36a67e 2362#define GOTO_DEPTH 64
2363 OP *enterops[GOTO_DEPTH];
cbbf8932 2364 const char *label = NULL;
bfed75c6
AL		 2365 const bool do_dump = (PL_op->op_type == OP_DUMP);
2366 static const char must_have_label[] = "goto must have label";
a0d0e21e 2367
533c011a 2368 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2369 SV * const sv = POPs;
a0d0e21e
LW		 2370
2371 /* This egregious kludge implements goto &subroutine */
2372 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2373 I32 cxix;
c09156bb 2374 register PERL_CONTEXT *cx;
a0d0e21e
LW		 2375 CV* cv = (CV*)SvRV(sv);
2376 SV** mark;
2377 I32 items = 0;
2378 I32 oldsave;
b1464ded 2379 bool reified = 0;
a0d0e21e 2380
e8f7dd13 2381 retry:
4aa0a1f7 2382 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2383 const GV * const gv = CvGV(cv);
e8f7dd13 2384 if (gv) {
7fc63493 2385 GV *autogv;
e8f7dd13
GS		 2386 SV *tmpstr;
2387 /* autoloaded stub? */
2388 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2389 goto retry;
2390 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2391 GvNAMELEN(gv), FALSE);
2392 if (autogv && (cv = GvCV(autogv)))
2393 goto retry;
2394 tmpstr = sv_newmortal();
c445ea15 2395 gv_efullname3(tmpstr, gv, NULL);
be2597df 2396 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2397 }
cea2e8a9 2398 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD		 2399 }
2400
a0d0e21e 2401 /* First do some returnish stuff. */
b37c2d43 2402 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2403 FREETMPS;
a0d0e21e
LW		 2404 cxix = dopoptosub(cxstack_ix);
2405 if (cxix < 0)
cea2e8a9 2406 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW		 2407 if (cxix < cxstack_ix)
2408 dounwind(cxix);
2409 TOPBLOCK(cx);
2d43a17f 2410 SPAGAIN;
564abe23 2411 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2412 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM		 2413 if (CxREALEVAL(cx))
2414 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2415 else
2416 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2417 }
9850bf21
RH		 2418 else if (CxMULTICALL(cx))
2419 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2420 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2421 /* put @_ back onto stack */
a0d0e21e 2422 AV* av = cx->blk_sub.argarray;
bfed75c6 2423
93965878 2424 items = AvFILLp(av) + 1;
a45cdc79
DM		 2425 EXTEND(SP, items+1); /* @_ could have been extended. */
2426 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS		 2427 SvREFCNT_dec(GvAV(PL_defgv));
2428 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2429 CLEAR_ARGARRAY(av);
d8b46c1b 2430 /* abandon @_ if it got reified */
62b1ebc2 2431 if (AvREAL(av)) {
b1464ded
DM		 2432 reified = 1;
2433 SvREFCNT_dec(av);
d8b46c1b
GS		 2434 av = newAV();
2435 av_extend(av, items-1);
11ca45c0 2436 AvREIFY_only(av);
dd2155a4 2437 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2438 }
a0d0e21e 2439 }
aed2304a 2440 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2441 AV* const av = GvAV(PL_defgv);
1fa4e549 2442 items = AvFILLp(av) + 1;
a45cdc79
DM		 2443 EXTEND(SP, items+1); /* @_ could have been extended. */
2444 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2445 }
a45cdc79
DM		 2446 mark = SP;
2447 SP += items;
6b35e009 2448 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2449 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2450 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2451 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW		 2452 LEAVE_SCOPE(oldsave);
2453
2454 /* Now do some callish stuff. */
2455 SAVETMPS;
5023d17a 2456 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2457 if (CvISXSUB(cv)) {
b37c2d43 2458 OP* const retop = cx->blk_sub.retop;
f73ef291
NC		 2459 SV **newsp;
2460 I32 gimme;
b1464ded
DM		 2461 if (reified) {
2462 I32 index;
2463 for (index=0; index<items; index++)
2464 sv_2mortal(SP[-index]);
2465 }
1fa4e549 2466
b37c2d43
AL		 2467 /* XS subs don't have a CxSUB, so pop it */
2468 POPBLOCK(cx, PL_curpm);
2469 /* Push a mark for the start of arglist */
2470 PUSHMARK(mark);
2471 PUTBACK;
2472 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2473 LEAVE;
5eff7df7 2474 return retop;
a0d0e21e
LW		 2475 }
2476 else {
b37c2d43 2477 AV* const padlist = CvPADLIST(cv);
6b35e009 2478 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2479 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2480 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2481 cx->cx_type = CXt_SUB;
b150fb22 2482 }
a0d0e21e 2483 cx->blk_sub.cv = cv;
1a5b3db4 2484 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2485
a0d0e21e
LW		 2486 CvDEPTH(cv)++;
2487 if (CvDEPTH(cv) < 2)
74c765eb 2488 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2489 else {
2b9dff67 2490 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2491 sub_crush_depth(cv);
26019298 2492 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2493 }
fd617465
DM		 2494 SAVECOMPPAD();
2495 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2496 if (CxHASARGS(cx))
6d4ff0d2 2497 {
b37c2d43 2498 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2499
3280af22 2500 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2501 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2502 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2503 cx->blk_sub.argarray = av;
a0d0e21e
LW		 2504
2505 if (items >= AvMAX(av) + 1) {
b37c2d43 2506 SV **ary = AvALLOC(av);
a0d0e21e
LW		 2507 if (AvARRAY(av) != ary) {
2508 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2509 AvARRAY(av) = ary;
a0d0e21e
LW		 2510 }
2511 if (items >= AvMAX(av) + 1) {
2512 AvMAX(av) = items - 1;
2513 Renew(ary,items+1,SV*);
2514 AvALLOC(av) = ary;
9c6bc640 2515 AvARRAY(av) = ary;
a0d0e21e
LW		 2516 }
2517 }
a45cdc79 2518 ++mark;
a0d0e21e 2519 Copy(mark,AvARRAY(av),items,SV*);
93965878 2520 AvFILLp(av) = items - 1;
d8b46c1b 2521 assert(!AvREAL(av));
b1464ded
DM		 2522 if (reified) {
2523 /* transfer 'ownership' of refcnts to new @_ */
2524 AvREAL_on(av);
2525 AvREIFY_off(av);
2526 }
a0d0e21e
LW		 2527 while (items--) {
2528 if (*mark)
2529 SvTEMP_off(*mark);
2530 mark++;
2531 }
2532 }
491527d0 2533 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2534 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL		 2535 if (PERLDB_GOTO) {
2536 CV * const gotocv = get_cv("DB::goto", FALSE);
2537 if (gotocv) {
2538 PUSHMARK( PL_stack_sp );
2539 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2540 PL_stack_sp--;
2541 }
491527d0 2542 }
1ce6579f 2543 }
a0d0e21e
LW		 2544 RETURNOP(CvSTART(cv));
2545 }
2546 }
1614b0e3 2547 else {
0510663f 2548 label = SvPV_nolen_const(sv);
1614b0e3 2549 if (!(do_dump || *label))
cea2e8a9 2550 DIE(aTHX_ must_have_label);
1614b0e3 2551 }
a0d0e21e 2552 }
533c011a 2553 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2554 if (! do_dump)
cea2e8a9 2555 DIE(aTHX_ must_have_label);
a0d0e21e
LW		 2556 }
2557 else
2558 label = cPVOP->op_pv;
2559
2560 if (label && *label) {
cbbf8932 2561 OP *gotoprobe = NULL;
3b2447bc 2562 bool leaving_eval = FALSE;
33d34e4c 2563 bool in_block = FALSE;
cbbf8932 2564 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW		 2565
2566 /* find label */
2567
d4c19fe8 2568 PL_lastgotoprobe = NULL;
a0d0e21e
LW		 2569 *enterops = 0;
2570 for (ix = cxstack_ix; ix >= 0; ix--) {
2571 cx = &cxstack[ix];
6b35e009 2572 switch (CxTYPE(cx)) {
a0d0e21e 2573 case CXt_EVAL:
3b2447bc 2574 leaving_eval = TRUE;
971ecbe6 2575 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH		 2576 gotoprobe = (last_eval_cx ?
2577 last_eval_cx->blk_eval.old_eval_root :
2578 PL_eval_root);
2579 last_eval_cx = cx;
9c5794fe
RH		 2580 break;
2581 }
2582 /* else fall through */
c6fdafd0 2583 case CXt_LOOP_LAZYIV:
d01136d6 2584 case CXt_LOOP_LAZYSV:
3b719c58
NC		 2585 case CXt_LOOP_FOR:
2586 case CXt_LOOP_PLAIN:
a0d0e21e
LW		 2587 gotoprobe = cx->blk_oldcop->op_sibling;
2588 break;
2589 case CXt_SUBST:
2590 continue;
2591 case CXt_BLOCK:
33d34e4c 2592 if (ix) {
a0d0e21e 2593 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE		 2594 in_block = TRUE;
2595 } else
3280af22 2596 gotoprobe = PL_main_root;
a0d0e21e 2597 break;
b3933176 2598 case CXt_SUB:
9850bf21 2599 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS		 2600 gotoprobe = CvROOT(cx->blk_sub.cv);
2601 break;
2602 }
2603 /* FALL THROUGH */
7766f137 2604 case CXt_FORMAT:
0a753a76 2605 case CXt_NULL:
a651a37d 2606 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW		 2607 default:
2608 if (ix)
cea2e8a9 2609 DIE(aTHX_ "panic: goto");
3280af22 2610 gotoprobe = PL_main_root;
a0d0e21e
LW		 2611 break;
2612 }
2b597662
GS		 2613 if (gotoprobe) {
2614 retop = dofindlabel(gotoprobe, label,
2615 enterops, enterops + GOTO_DEPTH);
2616 if (retop)
2617 break;
2618 }
3280af22 2619 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW		 2620 }
2621 if (!retop)
cea2e8a9 2622 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2623
3b2447bc
RH		 2624 /* if we're leaving an eval, check before we pop any frames
2625 that we're not going to punt, otherwise the error
2626 won't be caught */
2627
2628 if (leaving_eval && *enterops && enterops[1]) {
2629 I32 i;
2630 for (i = 1; enterops[i]; i++)
2631 if (enterops[i]->op_type == OP_ENTERITER)
2632 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2633 }
2634
a0d0e21e
LW		 2635 /* pop unwanted frames */
2636
2637 if (ix < cxstack_ix) {
2638 I32 oldsave;
2639
2640 if (ix < 0)
2641 ix = 0;
2642 dounwind(ix);
2643 TOPBLOCK(cx);
3280af22 2644 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW		 2645 LEAVE_SCOPE(oldsave);
2646 }
2647
2648 /* push wanted frames */
2649
748a9306 2650 if (*enterops && enterops[1]) {
0bd48802 2651 OP * const oldop = PL_op;
33d34e4c
AE		 2652 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2653 for (; enterops[ix]; ix++) {
533c011a 2654 PL_op = enterops[ix];
84902520
TB		 2655 /* Eventually we may want to stack the needed arguments
2656 * for each op. For now, we punt on the hard ones. */
533c011a 2657 if (PL_op->op_type == OP_ENTERITER)
894356b3 2658 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2659 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2660 }
533c011a 2661 PL_op = oldop;
a0d0e21e
LW		 2662 }
2663 }
2664
2665 if (do_dump) {
a5f75d66 2666#ifdef VMS
6b88bc9c 2667 if (!retop) retop = PL_main_start;
a5f75d66 2668#endif
3280af22
NIS		 2669 PL_restartop = retop;
2670 PL_do_undump = TRUE;
a0d0e21e
LW		 2671
2672 my_unexec();
2673
3280af22
NIS		 2674 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2675 PL_do_undump = FALSE;
a0d0e21e
LW		 2676 }
2677
2678 RETURNOP(retop);
2679}
2680
2681PP(pp_exit)
2682{
97aff369 2683 dVAR;
39644a26 2684 dSP;
a0d0e21e
LW		 2685 I32 anum;
2686
2687 if (MAXARG < 1)
2688 anum = 0;
ff0cee69 2689 else {
a0d0e21e 2690 anum = SvIVx(POPs);
d98f61e7
GS		 2691#ifdef VMS
2692 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2693 anum = 0;
96e176bf 2694 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69 2695#endif
2696 }
cc3604b1 2697 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC		 2698#ifdef PERL_MAD
2699 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2700 if (anum || !(PL_minus_c && PL_madskills))
2701 my_exit(anum);
2702#else
a0d0e21e 2703 my_exit(anum);
81d86705 2704#endif
3280af22 2705 PUSHs(&PL_sv_undef);
a0d0e21e
LW		 2706 RETURN;
2707}
2708
a0d0e21e
LW		 2709/* Eval. */
2710
0824fdcb 2711STATIC void
cea2e8a9 2712S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2713{
504618e9 2714 const char *s = SvPVX_const(sv);
890ce7af 2715 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2716 I32 line = 1;
a0d0e21e
LW		 2717
2718 while (s && s < send) {
f54cb97a 2719 const char *t;
b9f83d2f 2720 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 2721
a0d0e21e
LW		 2722 t = strchr(s, '\n');
2723 if (t)
2724 t++;
2725 else
2726 t = send;
2727
2728 sv_setpvn(tmpstr, s, t - s);
2729 av_store(array, line++, tmpstr);
2730 s = t;
2731 }
2732}
2733
0824fdcb 2734STATIC OP *
cea2e8a9 2735S_docatch(pTHX_ OP *o)
1e422769 2736{
97aff369 2737 dVAR;
6224f72b 2738 int ret;
06b5626a 2739 OP * const oldop = PL_op;
db36c5a1 2740 dJMPENV;
1e422769 2741
1e422769 2742#ifdef DEBUGGING
54310121 2743 assert(CATCH_GET == TRUE);
1e422769 2744#endif
312caa8e 2745 PL_op = o;
8bffa5f8 2746
14dd3ad8 2747 JMPENV_PUSH(ret);
6224f72b 2748 switch (ret) {
312caa8e 2749 case 0:
abd70938
DM		 2750 assert(cxstack_ix >= 0);
2751 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2752 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 2753 redo_body:
85aaa934 2754 CALLRUNOPS(aTHX);
312caa8e
CS		 2755 break;
2756 case 3:
8bffa5f8 2757 /* die caught by an inner eval - continue inner loop */
abd70938
DM		 2758
2759 /* NB XXX we rely on the old popped CxEVAL still being at the top
2760 * of the stack; the way die_where() currently works, this
2761 * assumption is valid. In theory The cur_top_env value should be
2762 * returned in another global, the way retop (aka PL_restartop)
2763 * is. */
2764 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2765
2766 if (PL_restartop
2767 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2768 {
312caa8e
CS		 2769 PL_op = PL_restartop;
2770 PL_restartop = 0;
2771 goto redo_body;
2772 }
2773 /* FALL THROUGH */
2774 default:
14dd3ad8 2775 JMPENV_POP;
533c011a 2776 PL_op = oldop;
6224f72b 2777 JMPENV_JUMP(ret);
1e422769 2778 /* NOTREACHED */
1e422769 2779 }
14dd3ad8 2780 JMPENV_POP;
533c011a 2781 PL_op = oldop;
5f66b61c 2782 return NULL;
1e422769 2783}
2784
c277df42 2785OP *
bfed75c6 2786Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ		 2787/* sv Text to convert to OP tree. */
2788/* startop op_free() this to undo. */
2789/* code Short string id of the caller. */
2790{
f7997f86 2791 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2792 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ		 2793 PERL_CONTEXT *cx;
2794 SV **newsp;
b094c71d 2795 I32 gimme = G_VOID;
c277df42
IZ		 2796 I32 optype;
2797 OP dummy;
83ee9e09
GS		 2798 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2799 char *tmpbuf = tbuf;
c277df42 2800 char *safestr;
a3985cdc 2801 int runtime;
601f1833 2802 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2803 STRLEN len;
c277df42
IZ		 2804
2805 ENTER;
5486870f 2806 lex_start(sv, NULL, FALSE);
c277df42
IZ		 2807 SAVETMPS;
2808 /* switch to eval mode */
2809
923e4eb5 2810 if (IN_PERL_COMPILETIME) {
f4dd75d9 2811 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2812 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2813 }
83ee9e09 2814 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2815 SV * const sv = sv_newmortal();
83ee9e09
GS		 2816 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2817 code, (unsigned long)++PL_evalseq,
2818 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2819 tmpbuf = SvPVX(sv);
fc009855 2820 len = SvCUR(sv);
83ee9e09
GS		 2821 }
2822 else
d9fad198
JH		 2823 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2824 (unsigned long)++PL_evalseq);
f4dd75d9 2825 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2826 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2827 SAVECOPLINE(&PL_compiling);
57843af0 2828 CopLINE_set(&PL_compiling, 1);
c277df42
IZ		 2829 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2830 deleting the eval's FILEGV from the stash before gv_check() runs
2831 (i.e. before run-time proper). To work around the coredump that
2832 ensues, we always turn GvMULTI_on for any globals that were
2833 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC		 2834 safestr = savepvn(tmpbuf, len);
2835 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2836 SAVEHINTS();
d1ca3daa 2837#ifdef OP_IN_REGISTER
6b88bc9c 2838 PL_opsave = op;
d1ca3daa 2839#else
7766f137 2840 SAVEVPTR(PL_op);
d1ca3daa 2841#endif
c277df42 2842
a3985cdc 2843 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2844 runtime = IN_PERL_RUNTIME;
a3985cdc 2845 if (runtime)
d819b83a 2846 runcv = find_runcv(NULL);
a3985cdc 2847
533c011a 2848 PL_op = &dummy;
13b51b79 2849 PL_op->op_type = OP_ENTEREVAL;
533c011a 2850 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2851 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
6b75f042 2852 PUSHEVAL(cx, 0);
a3985cdc
DM		 2853
2854 if (runtime)
410be5db 2855 (void) doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
a3985cdc 2856 else
410be5db 2857 (void) doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2858 POPBLOCK(cx,PL_curpm);
e84b9f1f 2859 POPEVAL(cx);
c277df42
IZ		 2860
2861 (*startop)->op_type = OP_NULL;
22c35a8c 2862 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2863 lex_end();
f3548bdc 2864 /* XXX DAPM do this properly one year */
b37c2d43 2865 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2866 LEAVE;
923e4eb5 2867 if (IN_PERL_COMPILETIME)
623e6609 2868 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2869#ifdef OP_IN_REGISTER
6b88bc9c 2870 op = PL_opsave;
d1ca3daa 2871#endif
9d4ba2ae
AL		 2872 PERL_UNUSED_VAR(newsp);
2873 PERL_UNUSED_VAR(optype);
2874
410be5db 2875 return PL_eval_start;
c277df42
IZ		 2876}
2877
a3985cdc
DM		 2878
2879/*
2880=for apidoc find_runcv
2881
2882Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM		 2883If db_seqp is non_null, skip CVs that are in the DB package and populate
2884*db_seqp with the cop sequence number at the point that the DB:: code was
2885entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2886than in the scope of the debugger itself).
a3985cdc
DM		 2887
2888=cut
2889*/
2890
2891CV*
d819b83a 2892Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2893{
97aff369 2894 dVAR;
a3985cdc 2895 PERL_SI *si;
a3985cdc 2896
d819b83a
DM		 2897 if (db_seqp)
2898 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2899 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2900 I32 ix;
a3985cdc 2901 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2902 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2903 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2904 CV * const cv = cx->blk_sub.cv;
d819b83a
DM		 2905 /* skip DB:: code */
2906 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2907 *db_seqp = cx->blk_oldcop->cop_seq;
2908 continue;
2909 }
2910 return cv;
2911 }
a3985cdc
DM		 2912 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2913 return PL_compcv;
2914 }
2915 }
2916 return PL_main_cv;
2917}
2918
2919
2920/* Compile a require/do, an eval '', or a /(?{...})/.
2921 * In the last case, startop is non-null, and contains the address of
2922 * a pointer that should be set to the just-compiled code.
2923 * outside is the lexically enclosing CV (if any) that invoked us.
410be5db
DM		 2924 * Returns a bool indicating whether the compile was successful; if so,
2925 * PL_eval_start contains the first op of the compiled ocde; otherwise,
2926 * pushes undef (also croaks if startop != NULL).
a3985cdc
DM		 2927 */
2928
410be5db 2929STATIC bool
a3985cdc 2930S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2931{
27da23d5 2932 dVAR; dSP;
46c461b5 2933 OP * const saveop = PL_op;
a0d0e21e 2934
6dc8a9e4
IZ		 2935 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2936 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2937 : EVAL_INEVAL);
a0d0e21e 2938
1ce6579f 2939 PUSHMARK(SP);
2940
3280af22 2941 SAVESPTR(PL_compcv);
b9f83d2f 2942 PL_compcv = (CV*)newSV_type(SVt_PVCV);
1aff0e91 2943 CvEVAL_on(PL_compcv);
2090ab20
JH		 2944 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2945 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2946
a3985cdc 2947 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2948 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2949
dd2155a4 2950 /* set up a scratch pad */
a0d0e21e 2951
dd2155a4 2952 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2953 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2954
07055b4c 2955
81d86705
NC		 2956 if (!PL_madskills)
2957 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2958
a0d0e21e
LW		 2959 /* make sure we compile in the right package */
2960
ed094faf 2961 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2962 SAVESPTR(PL_curstash);
ed094faf 2963 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2964 }
3c10abe3 2965 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS		 2966 SAVESPTR(PL_beginav);
2967 PL_beginav = newAV();
2968 SAVEFREESV(PL_beginav);
3c10abe3
AG		 2969 SAVESPTR(PL_unitcheckav);
2970 PL_unitcheckav = newAV();
2971 SAVEFREESV(PL_unitcheckav);
a0d0e21e 2972
81d86705 2973#ifdef PERL_MAD
9da243ce 2974 SAVEBOOL(PL_madskills);
81d86705
NC		 2975 PL_madskills = 0;
2976#endif
2977
a0d0e21e
LW		 2978 /* try to compile it */
2979
5f66b61c 2980 PL_eval_root = NULL;
3280af22 2981 PL_curcop = &PL_compiling;
fc15ae8f 2982 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2983 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2984 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2985 else
c69006e4 2986 sv_setpvn(ERRSV,"",0);
13765c85 2987 if (yyparse() || PL_parser->error_count || !PL_eval_root) {
0c58d367 2988 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2989 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2990 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2991 const char *msg;
bfed75c6 2992
533c011a 2993 PL_op = saveop;
3280af22
NIS		 2994 if (PL_eval_root) {
2995 op_free(PL_eval_root);
5f66b61c 2996 PL_eval_root = NULL;
a0d0e21e 2997 }
3280af22 2998 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2999 if (!startop) {
3280af22 3000 POPBLOCK(cx,PL_curpm);
c277df42 3001 POPEVAL(cx);
c277df42 3002 }
a0d0e21e
LW		 3003 lex_end();
3004 LEAVE;
9d4ba2ae
AL		 3005
3006 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 3007 if (optype == OP_REQUIRE) {
b464bac0 3008 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 3009 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 3010 &PL_sv_undef, 0);
58d3fd3b
SH		 3011 Perl_croak(aTHX_ "%sCompilation failed in require",
3012 *msg ? msg : "Unknown error\n");
5a844595
GS		 3013 }
3014 else if (startop) {
3280af22 3015 POPBLOCK(cx,PL_curpm);
c277df42 3016 POPEVAL(cx);
5a844595
GS		 3017 Perl_croak(aTHX_ "%sCompilation failed in regexp",
3018 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 3019 }
9d7f88dd 3020 else {
9d7f88dd 3021 if (!*msg) {
6502358f 3022 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR		 3023 }
3024 }
9d4ba2ae 3025 PERL_UNUSED_VAR(newsp);
410be5db
DM		 3026 PUSHs(&PL_sv_undef);
3027 PUTBACK;
3028 return FALSE;
a0d0e21e 3029 }
57843af0 3030 CopLINE_set(&PL_compiling, 0);
c277df42 3031 if (startop) {
3280af22 3032 *startop = PL_eval_root;
c277df42 3033 } else
3280af22 3034 SAVEFREEOP(PL_eval_root);
0c58d367
RGS		 3035
3036 /* Set the context for this new optree.
3037 * If the last op is an OP_REQUIRE, force scalar context.
3038 * Otherwise, propagate the context from the eval(). */
3039 if (PL_eval_root->op_type == OP_LEAVEEVAL
3040 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
3041 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
3042 == OP_REQUIRE)
3043 scalar(PL_eval_root);
7df0357e 3044 else if ((gimme & G_WANT) == G_VOID)
3280af22 3045 scalarvoid(PL_eval_root);
7df0357e 3046 else if ((gimme & G_WANT) == G_ARRAY)
3280af22 3047 list(PL_eval_root);
a0d0e21e 3048 else
3280af22 3049 scalar(PL_eval_root);
a0d0e21e
LW		 3050
3051 DEBUG_x(dump_eval());
3052
55497cff 3053 /* Register with debugger: */
6482a30d 3054 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 3055 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff 3056 if (cv) {
3057 dSP;
924508f0 3058 PUSHMARK(SP);
cc49e20b 3059 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 3060 PUTBACK;
864dbfa3 3061 call_sv((SV*)cv, G_DISCARD);
55497cff 3062 }
3063 }
3064
3c10abe3
AG		 3065 if (PL_unitcheckav)
3066 call_list(PL_scopestack_ix, PL_unitcheckav);
3067
a0d0e21e
LW		 3068 /* compiled okay, so do it */
3069
3280af22
NIS		 3070 CvDEPTH(PL_compcv) = 1;
3071 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3072 PL_op = saveop; /* The caller may need it. */
bc177e6b 3073 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3074
410be5db
DM		 3075 PUTBACK;
3076 return TRUE;
a0d0e21e
LW		 3077}
3078
a6c40364 3079STATIC PerlIO *
0786552a 3080S_check_type_and_open(pTHX_ const char *name)
ce8abf5f
SP		 3081{
3082 Stat_t st;
c445ea15 3083 const int st_rc = PerlLIO_stat(name, &st);
df528165 3084
6b845e56 3085 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3086 return NULL;
ce8abf5f
SP		 3087 }
3088
0786552a 3089 return PerlIO_open(name, PERL_SCRIPT_MODE);
ce8abf5f
SP		 3090}
3091
75c20bac 3092#ifndef PERL_DISABLE_PMC
ce8abf5f 3093STATIC PerlIO *
0786552a 3094S_doopen_pm(pTHX_ const char *name, const STRLEN namelen)
b295d113 3095{
b295d113
TH		 3096 PerlIO *fp;
3097
ce9440c8 3098 if (namelen > 3 && memEQs(name + namelen - 3, 3, ".pm")) {
50b8ed39
NC		 3099 SV *const pmcsv = newSV(namelen + 2);
3100 char *const pmc = SvPVX(pmcsv);
a6c40364 3101 Stat_t pmcstat;
50b8ed39
NC		 3102
3103 memcpy(pmc, name, namelen);
3104 pmc[namelen] = 'c';
3105 pmc[namelen + 1] = '\0';
3106
a6c40364 3107 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
0786552a 3108 fp = check_type_and_open(name);
a6c40364
GS		 3109 }
3110 else {
0786552a 3111 fp = check_type_and_open(pmc);
b295d113 3112 }
a6c40364
GS		 3113 SvREFCNT_dec(pmcsv);
3114 }
3115 else {
0786552a 3116 fp = check_type_and_open(name);
b295d113 3117 }
b295d113 3118 return fp;
75c20bac 3119}
7925835c 3120#else
75c20bac 3121# define doopen_pm(name, namelen) check_type_and_open(name)
7925835c 3122#endif /* !PERL_DISABLE_PMC */
b295d113 3123
a0d0e21e
LW		 3124PP(pp_require)
3125{
27da23d5 3126 dVAR; dSP;
c09156bb 3127 register PERL_CONTEXT *cx;
a0d0e21e 3128 SV *sv;
5c144d81 3129 const char *name;
6132ea6c 3130 STRLEN len;
4492be7a
JM		 3131 char * unixname;
3132 STRLEN unixlen;
62f5ad7a 3133#ifdef VMS
4492be7a 3134 int vms_unixname = 0;
62f5ad7a 3135#endif
c445ea15
AL		 3136 const char *tryname = NULL;
3137 SV *namesv = NULL;
f54cb97a 3138 const I32 gimme = GIMME_V;
bbed91b5 3139 int filter_has_file = 0;
c445ea15 3140 PerlIO *tryrsfp = NULL;
34113e50 3141 SV *filter_cache = NULL;
c445ea15
AL		 3142 SV *filter_state = NULL;
3143 SV *filter_sub = NULL;
3144 SV *hook_sv = NULL;
6ec9efec
JH		 3145 SV *encoding;
3146 OP *op;
a0d0e21e
LW		 3147
3148 sv = POPs;
d7aa5382 3149 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d7aa5382
JP		 3150 sv = new_version(sv);
3151 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3152 upg_version(PL_patchlevel, TRUE);
149c1637 3153 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3154 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3155 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3156 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS		 3157 }
3158 else {
d1029faa
JP		 3159 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3160 I32 first = 0;
3161 AV *lav;
3162 SV * const req = SvRV(sv);
3163 SV * const pv = *hv_fetchs((HV*)req, "original", FALSE);
3164
3165 /* get the left hand term */
3166 lav = (AV *)SvRV(*hv_fetchs((HV*)req, "version", FALSE));
3167
3168 first = SvIV(*av_fetch(lav,0,0));
3169 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
3170 || hv_exists((HV*)req, "qv", 2 ) /* qv style */
3171 || av_len(lav) > 1 /* FP with > 3 digits */
3172 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3173 ) {
3174 DIE(aTHX_ "Perl %"SVf" required--this is only "
3175 "%"SVf", stopped", SVfARG(vnormal(req)),
3176 SVfARG(vnormal(PL_patchlevel)));
3177 }
3178 else { /* probably 'use 5.10' or 'use 5.8' */
3179 SV * hintsv = newSV(0);
3180 I32 second = 0;
3181
3182 if (av_len(lav)>=1)
3183 second = SvIV(*av_fetch(lav,1,0));
3184
3185 second /= second >= 600 ? 100 : 10;
3186 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.%d",
3187 (int)first, (int)second,0);
3188 upg_version(hintsv, TRUE);
3189
3190 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3191 "--this is only %"SVf", stopped",
3192 SVfARG(vnormal(req)),
3193 SVfARG(vnormal(hintsv)),
3194 SVfARG(vnormal(PL_patchlevel)));
3195 }
3196 }
468aa647 3197 }
d7aa5382 3198
fbc891ce
RB		 3199 /* We do this only with use, not require. */
3200 if (PL_compcv &&
fbc891ce
RB		 3201 /* If we request a version >= 5.9.5, load feature.pm with the
3202 * feature bundle that corresponds to the required version. */
2e8342de 3203 vcmp(sv, sv_2mortal(upg_version(newSVnv(5.009005), FALSE))) >= 0) {
7dfde25d
RGS		 3204 SV *const importsv = vnormal(sv);
3205 *SvPVX_mutable(importsv) = ':';
3206 ENTER;
3207 Perl_load_module(aTHX_ 0, newSVpvs("feature"), NULL, importsv, NULL);
3208 LEAVE;
3209 }
3210
3211 RETPUSHYES;
a0d0e21e 3212 }
5c144d81 3213 name = SvPV_const(sv, len);
6132ea6c 3214 if (!(name && len > 0 && *name))
cea2e8a9 3215 DIE(aTHX_ "Null filename used");
4633a7c4 3216 TAINT_PROPER("require");
4492be7a
JM		 3217
3218
3219#ifdef VMS
3220 /* The key in the %ENV hash is in the syntax of file passed as the argument
3221 * usually this is in UNIX format, but sometimes in VMS format, which
3222 * can result in a module being pulled in more than once.
3223 * To prevent this, the key must be stored in UNIX format if the VMS
3224 * name can be translated to UNIX.
3225 */
3226 if ((unixname = tounixspec(name, NULL)) != NULL) {
3227 unixlen = strlen(unixname);
3228 vms_unixname = 1;
3229 }
3230 else
3231#endif
3232 {
3233 /* if not VMS or VMS name can not be translated to UNIX, pass it
3234 * through.
3235 */
3236 unixname = (char *) name;
3237 unixlen = len;
3238 }
44f8325f 3239 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM		 3240 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3241 unixname, unixlen, 0);
44f8325f
AL		 3242 if ( svp ) {
3243 if (*svp != &PL_sv_undef)
3244 RETPUSHYES;
3245 else
087b5369
RD		 3246 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3247 "Compilation failed in require", unixname);
44f8325f 3248 }
4d8b06f1 3249 }
a0d0e21e
LW		 3250
3251 /* prepare to compile file */
3252
be4b629d 3253 if (path_is_absolute(name)) {
46fc3d4c 3254 tryname = name;
0786552a 3255 tryrsfp = doopen_pm(name, len);
bf4acbe4 3256 }
67627c52
JH		 3257#ifdef MACOS_TRADITIONAL
3258 if (!tryrsfp) {
3259 char newname[256];
3260
3261 MacPerl_CanonDir(name, newname, 1);
3262 if (path_is_absolute(newname)) {
3263 tryname = newname;
0786552a 3264 tryrsfp = doopen_pm(newname, strlen(newname));
67627c52
JH		 3265 }
3266 }
3267#endif
be4b629d 3268 if (!tryrsfp) {
44f8325f 3269 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3270 I32 i;
748a9306 3271#ifdef VMS
4492be7a 3272 if (vms_unixname)
46fc3d4c 3273#endif
3274 {
d0328fd7 3275 namesv = newSV_type(SVt_PV);
46fc3d4c 3276 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3277 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3278
c38a6530
RD		 3279 if (SvTIED_mg((SV*)ar, PERL_MAGIC_tied))
3280 mg_get(dirsv);
bbed91b5
KF		 3281 if (SvROK(dirsv)) {
3282 int count;
a3b58a99 3283 SV **svp;
bbed91b5
KF		 3284 SV *loader = dirsv;
3285
e14e2dc8
NC		 3286 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3287 && !sv_isobject(loader))
3288 {
bbed91b5
KF		 3289 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3290 }
3291
b900a521 3292 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3293 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3294 tryname = SvPVX_const(namesv);
c445ea15 3295 tryrsfp = NULL;
bbed91b5
KF		 3296
3297 ENTER;
3298 SAVETMPS;
3299 EXTEND(SP, 2);
3300
3301 PUSHMARK(SP);
3302 PUSHs(dirsv);
3303 PUSHs(sv);
3304 PUTBACK;
e982885c
NC		 3305 if (sv_isobject(loader))
3306 count = call_method("INC", G_ARRAY);
3307 else
3308 count = call_sv(loader, G_ARRAY);
bbed91b5
KF		 3309 SPAGAIN;
3310
a3b58a99
RGS		 3311 /* Adjust file name if the hook has set an %INC entry */
3312 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3313 if (svp)
3314 tryname = SvPVX_const(*svp);
3315
bbed91b5
KF		 3316 if (count > 0) {
3317 int i = 0;
3318 SV *arg;
3319
3320 SP -= count - 1;
3321 arg = SP[i++];
3322
34113e50
NC		 3323 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3324 && !isGV_with_GP(SvRV(arg))) {
3325 filter_cache = SvRV(arg);
74c765eb 3326 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC		 3327
3328 if (i < count) {
3329 arg = SP[i++];
3330 }
3331 }
3332
bbed91b5
KF		 3333 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3334 arg = SvRV(arg);
3335 }
3336
3337 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3338 IO * const io = GvIO((GV *)arg);
bbed91b5
KF		 3339
3340 ++filter_has_file;
3341
3342 if (io) {
3343 tryrsfp = IoIFP(io);
0f7de14d
NC		 3344 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3345 PerlIO_close(IoOFP(io));
bbed91b5 3346 }
0f7de14d
NC		 3347 IoIFP(io) = NULL;
3348 IoOFP(io) = NULL;
bbed91b5
KF		 3349 }
3350
3351 if (i < count) {
3352 arg = SP[i++];
3353 }
3354 }
3355
3356 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3357 filter_sub = arg;
74c765eb 3358 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF		 3359
3360 if (i < count) {
3361 filter_state = SP[i];
b37c2d43 3362 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3363 }
34113e50 3364 }
bbed91b5 3365
34113e50
NC		 3366 if (!tryrsfp && (filter_cache || filter_sub)) {
3367 tryrsfp = PerlIO_open(BIT_BUCKET,
3368 PERL_SCRIPT_MODE);
bbed91b5 3369 }
1d06aecd 3370 SP--;
bbed91b5
KF		 3371 }
3372
3373 PUTBACK;
3374 FREETMPS;
3375 LEAVE;
3376
3377 if (tryrsfp) {
89ccab8c 3378 hook_sv = dirsv;
bbed91b5
KF		 3379 break;
3380 }
3381
3382 filter_has_file = 0;
34113e50
NC		 3383 if (filter_cache) {
3384 SvREFCNT_dec(filter_cache);
3385 filter_cache = NULL;
3386 }
bbed91b5
KF		 3387 if (filter_state) {
3388 SvREFCNT_dec(filter_state);
c445ea15 3389 filter_state = NULL;
bbed91b5
KF		 3390 }
3391 if (filter_sub) {
3392 SvREFCNT_dec(filter_sub);
c445ea15 3393 filter_sub = NULL;
bbed91b5
KF		 3394 }
3395 }
3396 else {
be4b629d
CN		 3397 if (!path_is_absolute(name)
3398#ifdef MACOS_TRADITIONAL
3399 /* We consider paths of the form :a:b ambiguous and interpret them first
3400 as global then as local
3401 */
3402 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3403#endif
3404 ) {
b640a14a
NC		 3405 const char *dir;
3406 STRLEN dirlen;
3407
3408 if (SvOK(dirsv)) {
3409 dir = SvPV_const(dirsv, dirlen);
3410 } else {
3411 dir = "";
3412 dirlen = 0;
3413 }
3414
bf4acbe4 3415#ifdef MACOS_TRADITIONAL
67627c52
JH		 3416 char buf1[256];
3417 char buf2[256];
3418
3419 MacPerl_CanonDir(name, buf2, 1);
3420 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3421#else
27da23d5 3422# ifdef VMS
bbed91b5 3423 char *unixdir;
c445ea15 3424 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF		 3425 continue;
3426 sv_setpv(namesv, unixdir);
3427 sv_catpv(namesv, unixname);
27da23d5 3428# else