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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,
b94e2f88 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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
a0d0e21e
LW
41PP(pp_wantarray)
42{
97aff369 43 dVAR;
39644a26 44 dSP;
a0d0e21e
LW
45 I32 cxix;
46 EXTEND(SP, 1);
47
48 cxix = dopoptosub(cxstack_ix);
49 if (cxix < 0)
50 RETPUSHUNDEF;
51
54310121
PP
52 switch (cxstack[cxix].blk_gimme) {
53 case G_ARRAY:
a0d0e21e 54 RETPUSHYES;
54310121 55 case G_SCALAR:
a0d0e21e 56 RETPUSHNO;
54310121
PP
57 default:
58 RETPUSHUNDEF;
59 }
a0d0e21e
LW
60}
61
2cd61cdb
IZ
62PP(pp_regcreset)
63{
97aff369 64 dVAR;
2cd61cdb
IZ
65 /* XXXX Should store the old value to allow for tie/overload - and
66 restore in regcomp, where marked with XXXX. */
3280af22 67 PL_reginterp_cnt = 0;
0b4182de 68 TAINT_NOT;
2cd61cdb
IZ
69 return NORMAL;
70}
71
b3eb6a9b
GS
72PP(pp_regcomp)
73{
97aff369 74 dVAR;
39644a26 75 dSP;
a0d0e21e 76 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 77 SV *tmpstr;
4608196e 78 MAGIC *mg = NULL;
bfed75c6 79
4b5a0d1c 80 /* prevent recompiling under /o and ithreads. */
3db8f154 81#if defined(USE_ITHREADS)
131b3ad0
DM
82 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
83 if (PL_op->op_flags & OPf_STACKED) {
84 dMARK;
85 SP = MARK;
86 }
87 else
88 (void)POPs;
89 RETURN;
90 }
513629ba 91#endif
131b3ad0
DM
92 if (PL_op->op_flags & OPf_STACKED) {
93 /* multiple args; concatentate them */
94 dMARK; dORIGMARK;
95 tmpstr = PAD_SV(ARGTARG);
96 sv_setpvn(tmpstr, "", 0);
97 while (++MARK <= SP) {
98 if (PL_amagic_generation) {
99 SV *sv;
100 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
101 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
102 {
103 sv_setsv(tmpstr, sv);
104 continue;
105 }
106 }
107 sv_catsv(tmpstr, *MARK);
108 }
109 SvSETMAGIC(tmpstr);
110 SP = ORIGMARK;
111 }
112 else
113 tmpstr = POPs;
513629ba 114
b3eb6a9b 115 if (SvROK(tmpstr)) {
d8f6592e 116 SV * const sv = SvRV(tmpstr);
c277df42 117 if(SvMAGICAL(sv))
14befaf4 118 mg = mg_find(sv, PERL_MAGIC_qr);
c277df42 119 }
b3eb6a9b 120 if (mg) {
44f8325f 121 regexp * const re = (regexp *)mg->mg_obj;
aaa362c4
RS
122 ReREFCNT_dec(PM_GETRE(pm));
123 PM_SETRE(pm, ReREFCNT_inc(re));
c277df42
IZ
124 }
125 else {
e62f0680
NC
126 STRLEN len;
127 const char *t = SvPV_const(tmpstr, len);
d8f6592e 128 regexp * const re = PM_GETRE(pm);
c277df42 129
20408e3c 130 /* Check against the last compiled regexp. */
d8f6592e
AL
131 if (!re || !re->precomp || re->prelen != (I32)len ||
132 memNE(re->precomp, t, len))
85aff577 133 {
d8f6592e
AL
134 if (re) {
135 ReREFCNT_dec(re);
4608196e 136 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
c277df42 137 }
533c011a 138 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 139 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 140
c277df42 141 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
84e09d5e
JH
142 if (DO_UTF8(tmpstr))
143 pm->op_pmdynflags |= PMdf_DYN_UTF8;
144 else {
145 pm->op_pmdynflags &= ~PMdf_DYN_UTF8;
146 if (pm->op_pmdynflags & PMdf_UTF8)
147 t = (char*)bytes_to_utf8((U8*)t, &len);
148 }
e62f0680 149 PM_SETRE(pm, CALLREGCOMP(aTHX_ (char *)t, (char *)t + len, pm));
84e09d5e
JH
150 if (!DO_UTF8(tmpstr) && (pm->op_pmdynflags & PMdf_UTF8))
151 Safefree(t);
f86aaa29 152 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 153 inside tie/overload accessors. */
c277df42 154 }
4633a7c4 155 }
a0d0e21e 156
72311751 157#ifndef INCOMPLETE_TAINTS
3280af22
NIS
158 if (PL_tainting) {
159 if (PL_tainted)
72311751
GS
160 pm->op_pmdynflags |= PMdf_TAINTED;
161 else
162 pm->op_pmdynflags &= ~PMdf_TAINTED;
163 }
164#endif
165
aaa362c4 166 if (!PM_GETRE(pm)->prelen && PL_curpm)
3280af22 167 pm = PL_curpm;
17cbf7cc
AMS
168 else if (strEQ("\\s+", PM_GETRE(pm)->precomp))
169 pm->op_pmflags |= PMf_WHITE;
16bdb4ac 170 else
17cbf7cc 171 pm->op_pmflags &= ~PMf_WHITE;
a0d0e21e 172
2360cd68 173 /* XXX runtime compiled output needs to move to the pad */
a0d0e21e 174 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 175 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
3db8f154 176#if !defined(USE_ITHREADS)
2360cd68 177 /* XXX can't change the optree at runtime either */
533c011a 178 cLOGOP->op_first->op_next = PL_op->op_next;
2360cd68 179#endif
a0d0e21e
LW
180 }
181 RETURN;
182}
183
184PP(pp_substcont)
185{
97aff369 186 dVAR;
39644a26 187 dSP;
c09156bb 188 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL
189 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
190 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW
191 register char *s = cx->sb_s;
192 register char *m = cx->sb_m;
193 char *orig = cx->sb_orig;
901017d6 194 register REGEXP * const rx = cx->sb_rx;
c445ea15 195 SV *nsv = NULL;
988e6e7e
AE
196 REGEXP *old = PM_GETRE(pm);
197 if(old != rx) {
bfed75c6 198 if(old)
988e6e7e 199 ReREFCNT_dec(old);
e22ae1e2 200 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB
201 }
202
d9f97599 203 rxres_restore(&cx->sb_rxres, rx);
01b35787 204 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 205
a0d0e21e 206 if (cx->sb_iters++) {
a3b680e6 207 const I32 saviters = cx->sb_iters;
a0d0e21e 208 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 209 DIE(aTHX_ "Substitution loop");
a0d0e21e 210
48c036b1
GS
211 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
212 cx->sb_rxtainted |= 2;
a0d0e21e 213 sv_catsv(dstr, POPs);
8ff629d9 214 FREETMPS; /* Prevent excess tmp stack */
a0d0e21e
LW
215
216 /* Are we done */
cea2e8a9 217 if (cx->sb_once || !CALLREGEXEC(aTHX_ rx, s, cx->sb_strend, orig,
9661b544 218 s == m, cx->sb_targ, NULL,
22e551b9 219 ((cx->sb_rflags & REXEC_COPY_STR)
cf93c79d
IZ
220 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
221 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 222 {
823a54a3 223 SV * const targ = cx->sb_targ;
748a9306 224
078c425b
JH
225 assert(cx->sb_strend >= s);
226 if(cx->sb_strend > s) {
227 if (DO_UTF8(dstr) && !SvUTF8(targ))
228 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
229 else
230 sv_catpvn(dstr, s, cx->sb_strend - s);
231 }
48c036b1 232 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 233
f8c7b90f 234#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
235 if (SvIsCOW(targ)) {
236 sv_force_normal_flags(targ, SV_COW_DROP_PV);
237 } else
238#endif
239 {
8bd4d4c5 240 SvPV_free(targ);
ed252734 241 }
f880fe2f 242 SvPV_set(targ, SvPVX(dstr));
748a9306
LW
243 SvCUR_set(targ, SvCUR(dstr));
244 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH
245 if (DO_UTF8(dstr))
246 SvUTF8_on(targ);
6136c704 247 SvPV_set(dstr, NULL);
48c036b1
GS
248
249 TAINT_IF(cx->sb_rxtainted & 1);
22e13caa 250 PUSHs(sv_2mortal(newSViv(saviters - 1)));
48c036b1 251
ffc61ed2 252 (void)SvPOK_only_UTF8(targ);
48c036b1 253 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 254 SvSETMAGIC(targ);
9212bbba 255 SvTAINT(targ);
5cd24f17 256
4633a7c4 257 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW
258 POPSUBST(cx);
259 RETURNOP(pm->op_next);
260 }
8e5e9ebe 261 cx->sb_iters = saviters;
a0d0e21e 262 }
cf93c79d 263 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
264 m = s;
265 s = orig;
cf93c79d 266 cx->sb_orig = orig = rx->subbeg;
a0d0e21e
LW
267 s = orig + (m - s);
268 cx->sb_strend = s + (cx->sb_strend - m);
269 }
cf93c79d 270 cx->sb_m = m = rx->startp[0] + orig;
db79b45b 271 if (m > s) {
bfed75c6 272 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
273 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
274 else
275 sv_catpvn(dstr, s, m-s);
276 }
cf93c79d 277 cx->sb_s = rx->endp[0] + orig;
084916e3 278 { /* Update the pos() information. */
44f8325f 279 SV * const sv = cx->sb_targ;
084916e3
JH
280 MAGIC *mg;
281 I32 i;
282 if (SvTYPE(sv) < SVt_PVMG)
862a34c6 283 SvUPGRADE(sv, SVt_PVMG);
14befaf4 284 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82
NC
285#ifdef PERL_OLD_COPY_ON_WRITE
286 if (SvIsCOW(lsv))
287 sv_force_normal_flags(sv, 0);
288#endif
289 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
290 NULL, 0);
084916e3
JH
291 }
292 i = m - orig;
293 if (DO_UTF8(sv))
294 sv_pos_b2u(sv, &i);
295 mg->mg_len = i;
296 }
988e6e7e 297 if (old != rx)
454f1e26 298 (void)ReREFCNT_inc(rx);
d9f97599
GS
299 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
300 rxres_save(&cx->sb_rxres, rx);
a0d0e21e
LW
301 RETURNOP(pm->op_pmreplstart);
302}
303
c90c0ff4 304void
864dbfa3 305Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
306{
307 UV *p = (UV*)*rsp;
308 U32 i;
96a5add6 309 PERL_UNUSED_CONTEXT;
c90c0ff4 310
d9f97599 311 if (!p || p[1] < rx->nparens) {
f8c7b90f 312#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
313 i = 7 + rx->nparens * 2;
314#else
d9f97599 315 i = 6 + rx->nparens * 2;
ed252734 316#endif
c90c0ff4 317 if (!p)
a02a5408 318 Newx(p, i, UV);
c90c0ff4
PP
319 else
320 Renew(p, i, UV);
321 *rsp = (void*)p;
322 }
323
c445ea15 324 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? rx->subbeg : NULL);
cf93c79d 325 RX_MATCH_COPIED_off(rx);
c90c0ff4 326
f8c7b90f 327#ifdef PERL_OLD_COPY_ON_WRITE
ed252734 328 *p++ = PTR2UV(rx->saved_copy);
c445ea15 329 rx->saved_copy = NULL;
ed252734
NC
330#endif
331
d9f97599 332 *p++ = rx->nparens;
c90c0ff4 333
56431972 334 *p++ = PTR2UV(rx->subbeg);
cf93c79d 335 *p++ = (UV)rx->sublen;
d9f97599
GS
336 for (i = 0; i <= rx->nparens; ++i) {
337 *p++ = (UV)rx->startp[i];
338 *p++ = (UV)rx->endp[i];
c90c0ff4
PP
339 }
340}
341
342void
864dbfa3 343Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
344{
345 UV *p = (UV*)*rsp;
346 U32 i;
96a5add6 347 PERL_UNUSED_CONTEXT;
c90c0ff4 348
ed252734 349 RX_MATCH_COPY_FREE(rx);
cf93c79d 350 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
351 *p++ = 0;
352
f8c7b90f 353#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
354 if (rx->saved_copy)
355 SvREFCNT_dec (rx->saved_copy);
356 rx->saved_copy = INT2PTR(SV*,*p);
357 *p++ = 0;
358#endif
359
d9f97599 360 rx->nparens = *p++;
c90c0ff4 361
56431972 362 rx->subbeg = INT2PTR(char*,*p++);
cf93c79d 363 rx->sublen = (I32)(*p++);
d9f97599 364 for (i = 0; i <= rx->nparens; ++i) {
cf93c79d
IZ
365 rx->startp[i] = (I32)(*p++);
366 rx->endp[i] = (I32)(*p++);
c90c0ff4
PP
367 }
368}
369
370void
864dbfa3 371Perl_rxres_free(pTHX_ void **rsp)
c90c0ff4 372{
44f8325f 373 UV * const p = (UV*)*rsp;
96a5add6 374 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
375
376 if (p) {
94010e71
NC
377#ifdef PERL_POISON
378 void *tmp = INT2PTR(char*,*p);
379 Safefree(tmp);
380 if (*p)
7e337ee0 381 PoisonFree(*p, 1, sizeof(*p));
94010e71 382#else
56431972 383 Safefree(INT2PTR(char*,*p));
94010e71 384#endif
f8c7b90f 385#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
386 if (p[1]) {
387 SvREFCNT_dec (INT2PTR(SV*,p[1]));
388 }
389#endif
c90c0ff4 390 Safefree(p);
4608196e 391 *rsp = NULL;
c90c0ff4
PP
392 }
393}
394
a0d0e21e
LW
395PP(pp_formline)
396{
97aff369 397 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 398 register SV * const tmpForm = *++MARK;
dea28490 399 register U32 *fpc;
a0d0e21e 400 register char *t;
245d4a47 401 const char *f;
a0d0e21e 402 register I32 arg;
c445ea15
AL
403 register SV *sv = NULL;
404 const char *item = NULL;
9c5ffd7c
JH
405 I32 itemsize = 0;
406 I32 fieldsize = 0;
a0d0e21e 407 I32 lines = 0;
c445ea15
AL
408 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
409 const char *chophere = NULL;
410 char *linemark = NULL;
65202027 411 NV value;
9c5ffd7c 412 bool gotsome = FALSE;
a0d0e21e 413 STRLEN len;
823a54a3 414 const STRLEN fudge = SvPOK(tmpForm)
24c89738 415 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
416 bool item_is_utf8 = FALSE;
417 bool targ_is_utf8 = FALSE;
c445ea15 418 SV * nsv = NULL;
cbbf8932 419 OP * parseres = NULL;
bfed75c6 420 const char *fmt;
a1b95068 421 bool oneline;
a0d0e21e 422
76e3520e 423 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
424 if (SvREADONLY(tmpForm)) {
425 SvREADONLY_off(tmpForm);
a1b95068 426 parseres = doparseform(tmpForm);
445b3f51
GS
427 SvREADONLY_on(tmpForm);
428 }
429 else
a1b95068
LW
430 parseres = doparseform(tmpForm);
431 if (parseres)
432 return parseres;
a0d0e21e 433 }
3280af22 434 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
435 if (DO_UTF8(PL_formtarget))
436 targ_is_utf8 = TRUE;
a0ed51b3 437 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 438 t += len;
245d4a47 439 f = SvPV_const(tmpForm, len);
a0d0e21e 440 /* need to jump to the next word */
245d4a47 441 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
442
443 for (;;) {
444 DEBUG_f( {
bfed75c6 445 const char *name = "???";
a0d0e21e
LW
446 arg = -1;
447 switch (*fpc) {
448 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
449 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
450 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
451 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
452 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
453
454 case FF_CHECKNL: name = "CHECKNL"; break;
455 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
456 case FF_SPACE: name = "SPACE"; break;
457 case FF_HALFSPACE: name = "HALFSPACE"; break;
458 case FF_ITEM: name = "ITEM"; break;
459 case FF_CHOP: name = "CHOP"; break;
460 case FF_LINEGLOB: name = "LINEGLOB"; break;
461 case FF_NEWLINE: name = "NEWLINE"; break;
462 case FF_MORE: name = "MORE"; break;
463 case FF_LINEMARK: name = "LINEMARK"; break;
464 case FF_END: name = "END"; break;
bfed75c6 465 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 466 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
467 }
468 if (arg >= 0)
bf49b057 469 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 470 else
bf49b057 471 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 472 } );
a0d0e21e
LW
473 switch (*fpc++) {
474 case FF_LINEMARK:
475 linemark = t;
a0d0e21e
LW
476 lines++;
477 gotsome = FALSE;
478 break;
479
480 case FF_LITERAL:
481 arg = *fpc++;
1bd51a4c 482 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 483 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
484 *t = '\0';
485 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
486 t = SvEND(PL_formtarget);
1bd51a4c
IH
487 break;
488 }
489 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 490 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
491 *t = '\0';
492 sv_utf8_upgrade(PL_formtarget);
493 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
494 t = SvEND(PL_formtarget);
495 targ_is_utf8 = TRUE;
496 }
a0d0e21e
LW
497 while (arg--)
498 *t++ = *f++;
499 break;
500
501 case FF_SKIP:
502 f += *fpc++;
503 break;
504
505 case FF_FETCH:
506 arg = *fpc++;
507 f += arg;
508 fieldsize = arg;
509
510 if (MARK < SP)
511 sv = *++MARK;
512 else {
3280af22 513 sv = &PL_sv_no;
599cee73 514 if (ckWARN(WARN_SYNTAX))
9014280d 515 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
516 }
517 break;
518
519 case FF_CHECKNL:
5a34cab7
NC
520 {
521 const char *send;
522 const char *s = item = SvPV_const(sv, len);
523 itemsize = len;
524 if (DO_UTF8(sv)) {
525 itemsize = sv_len_utf8(sv);
526 if (itemsize != (I32)len) {
527 I32 itembytes;
528 if (itemsize > fieldsize) {
529 itemsize = fieldsize;
530 itembytes = itemsize;
531 sv_pos_u2b(sv, &itembytes, 0);
532 }
533 else
534 itembytes = len;
535 send = chophere = s + itembytes;
536 while (s < send) {
537 if (*s & ~31)
538 gotsome = TRUE;
539 else if (*s == '\n')
540 break;
541 s++;
542 }
543 item_is_utf8 = TRUE;
544 itemsize = s - item;
545 sv_pos_b2u(sv, &itemsize);
546 break;
a0ed51b3 547 }
a0ed51b3 548 }
5a34cab7
NC
549 item_is_utf8 = FALSE;
550 if (itemsize > fieldsize)
551 itemsize = fieldsize;
552 send = chophere = s + itemsize;
553 while (s < send) {
554 if (*s & ~31)
555 gotsome = TRUE;
556 else if (*s == '\n')
557 break;
558 s++;
559 }
560 itemsize = s - item;
561 break;
a0ed51b3 562 }
a0d0e21e
LW
563
564 case FF_CHECKCHOP:
5a34cab7
NC
565 {
566 const char *s = item = SvPV_const(sv, len);
567 itemsize = len;
568 if (DO_UTF8(sv)) {
569 itemsize = sv_len_utf8(sv);
570 if (itemsize != (I32)len) {
571 I32 itembytes;
572 if (itemsize <= fieldsize) {
573 const char *send = chophere = s + itemsize;
574 while (s < send) {
575 if (*s == '\r') {
576 itemsize = s - item;
a0ed51b3 577 chophere = s;
a0ed51b3 578 break;
5a34cab7
NC
579 }
580 if (*s++ & ~31)
a0ed51b3 581 gotsome = TRUE;
a0ed51b3 582 }
a0ed51b3 583 }
5a34cab7
NC
584 else {
585 const char *send;
586 itemsize = fieldsize;
587 itembytes = itemsize;
588 sv_pos_u2b(sv, &itembytes, 0);
589 send = chophere = s + itembytes;
590 while (s < send || (s == send && isSPACE(*s))) {
591 if (isSPACE(*s)) {
592 if (chopspace)
593 chophere = s;
594 if (*s == '\r')
595 break;
596 }
597 else {
598 if (*s & ~31)
599 gotsome = TRUE;
600 if (strchr(PL_chopset, *s))
601 chophere = s + 1;
602 }
603 s++;
604 }
605 itemsize = chophere - item;
606 sv_pos_b2u(sv, &itemsize);
607 }
608 item_is_utf8 = TRUE;
a0d0e21e
LW
609 break;
610 }
a0d0e21e 611 }
5a34cab7
NC
612 item_is_utf8 = FALSE;
613 if (itemsize <= fieldsize) {
614 const char *const send = chophere = s + itemsize;
615 while (s < send) {
616 if (*s == '\r') {
617 itemsize = s - item;
a0d0e21e 618 chophere = s;
a0d0e21e 619 break;
5a34cab7
NC
620 }
621 if (*s++ & ~31)
a0d0e21e 622 gotsome = TRUE;
a0d0e21e 623 }
a0d0e21e 624 }
5a34cab7
NC
625 else {
626 const char *send;
627 itemsize = fieldsize;
628 send = chophere = s + itemsize;
629 while (s < send || (s == send && isSPACE(*s))) {
630 if (isSPACE(*s)) {
631 if (chopspace)
632 chophere = s;
633 if (*s == '\r')
634 break;
635 }
636 else {
637 if (*s & ~31)
638 gotsome = TRUE;
639 if (strchr(PL_chopset, *s))
640 chophere = s + 1;
641 }
642 s++;
643 }
644 itemsize = chophere - item;
645 }
646 break;
a0d0e21e 647 }
a0d0e21e
LW
648
649 case FF_SPACE:
650 arg = fieldsize - itemsize;
651 if (arg) {
652 fieldsize -= arg;
653 while (arg-- > 0)
654 *t++ = ' ';
655 }
656 break;
657
658 case FF_HALFSPACE:
659 arg = fieldsize - itemsize;
660 if (arg) {
661 arg /= 2;
662 fieldsize -= arg;
663 while (arg-- > 0)
664 *t++ = ' ';
665 }
666 break;
667
668 case FF_ITEM:
5a34cab7
NC
669 {
670 const char *s = item;
671 arg = itemsize;
672 if (item_is_utf8) {
673 if (!targ_is_utf8) {
674 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
675 *t = '\0';
676 sv_utf8_upgrade(PL_formtarget);
677 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
678 t = SvEND(PL_formtarget);
679 targ_is_utf8 = TRUE;
a0ed51b3 680 }
5a34cab7
NC
681 while (arg--) {
682 if (UTF8_IS_CONTINUED(*s)) {
683 STRLEN skip = UTF8SKIP(s);
684 switch (skip) {
685 default:
686 Move(s,t,skip,char);
687 s += skip;
688 t += skip;
689 break;
690 case 7: *t++ = *s++;
691 case 6: *t++ = *s++;
692 case 5: *t++ = *s++;
693 case 4: *t++ = *s++;
694 case 3: *t++ = *s++;
695 case 2: *t++ = *s++;
696 case 1: *t++ = *s++;
697 }
698 }
699 else {
700 if ( !((*t++ = *s++) & ~31) )
701 t[-1] = ' ';
702 }
a0ed51b3 703 }
5a34cab7 704 break;
a0ed51b3 705 }
5a34cab7
NC
706 if (targ_is_utf8 && !item_is_utf8) {
707 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
708 *t = '\0';
709 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
710 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 711#ifdef EBCDIC
901017d6 712 const int ch = *t;
5a34cab7 713 if (iscntrl(ch))
78da4d13 714#else
5a34cab7 715 if (!(*t & ~31))
78da4d13 716#endif
5a34cab7
NC
717 *t = ' ';
718 }
719 break;
78da4d13 720 }
5a34cab7 721 while (arg--) {
9d116dd7 722#ifdef EBCDIC
901017d6 723 const int ch = *t++ = *s++;
5a34cab7 724 if (iscntrl(ch))
a0d0e21e 725#else
5a34cab7 726 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 727#endif
5a34cab7
NC
728 t[-1] = ' ';
729 }
730 break;
a0d0e21e 731 }
a0d0e21e
LW
732
733 case FF_CHOP:
5a34cab7
NC
734 {
735 const char *s = chophere;
736 if (chopspace) {
af68e756 737 while (isSPACE(*s))
5a34cab7
NC
738 s++;
739 }
740 sv_chop(sv,s);
741 SvSETMAGIC(sv);
742 break;
a0d0e21e 743 }
a0d0e21e 744
a1b95068
LW
745 case FF_LINESNGL:
746 chopspace = 0;
747 oneline = TRUE;
748 goto ff_line;
a0d0e21e 749 case FF_LINEGLOB:
a1b95068
LW
750 oneline = FALSE;
751 ff_line:
5a34cab7
NC
752 {
753 const char *s = item = SvPV_const(sv, len);
754 itemsize = len;
755 if ((item_is_utf8 = DO_UTF8(sv)))
756 itemsize = sv_len_utf8(sv);
757 if (itemsize) {
758 bool chopped = FALSE;
759 const char *const send = s + len;
760 gotsome = TRUE;
761 chophere = s + itemsize;
762 while (s < send) {
763 if (*s++ == '\n') {
764 if (oneline) {
765 chopped = TRUE;
766 chophere = s;
767 break;
768 } else {
769 if (s == send) {
770 itemsize--;
771 chopped = TRUE;
772 } else
773 lines++;
774 }
1bd51a4c 775 }
a0d0e21e 776 }
5a34cab7
NC
777 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
778 if (targ_is_utf8)
779 SvUTF8_on(PL_formtarget);
780 if (oneline) {
781 SvCUR_set(sv, chophere - item);
782 sv_catsv(PL_formtarget, sv);
783 SvCUR_set(sv, itemsize);
784 } else
785 sv_catsv(PL_formtarget, sv);
786 if (chopped)
787 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) - 1);
788 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
789 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
790 if (item_is_utf8)
791 targ_is_utf8 = TRUE;
a0d0e21e 792 }
5a34cab7 793 break;
a0d0e21e 794 }
a0d0e21e 795
a1b95068
LW
796 case FF_0DECIMAL:
797 arg = *fpc++;
798#if defined(USE_LONG_DOUBLE)
799 fmt = (arg & 256) ? "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl;
800#else
801 fmt = (arg & 256) ? "%#0*.*f" : "%0*.*f";
802#endif
803 goto ff_dec;
a0d0e21e 804 case FF_DECIMAL:
a0d0e21e 805 arg = *fpc++;
65202027 806#if defined(USE_LONG_DOUBLE)
a1b95068 807 fmt = (arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl;
65202027 808#else
a1b95068 809 fmt = (arg & 256) ? "%#*.*f" : "%*.*f";
65202027 810#endif
a1b95068 811 ff_dec:
784707d5
JP
812 /* If the field is marked with ^ and the value is undefined,
813 blank it out. */
784707d5
JP
814 if ((arg & 512) && !SvOK(sv)) {
815 arg = fieldsize;
816 while (arg--)
817 *t++ = ' ';
818 break;
819 }
820 gotsome = TRUE;
821 value = SvNV(sv);
a1b95068 822 /* overflow evidence */
bfed75c6 823 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
824 arg = fieldsize;
825 while (arg--)
826 *t++ = '#';
827 break;
828 }
784707d5
JP
829 /* Formats aren't yet marked for locales, so assume "yes". */
830 {
831 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 832 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
833 RESTORE_NUMERIC_STANDARD();
834 }
835 t += fieldsize;
836 break;
a1b95068 837
a0d0e21e
LW
838 case FF_NEWLINE:
839 f++;
840 while (t-- > linemark && *t == ' ') ;
841 t++;
842 *t++ = '\n';
843 break;
844
845 case FF_BLANK:
846 arg = *fpc++;
847 if (gotsome) {
848 if (arg) { /* repeat until fields exhausted? */
849 *t = '\0';
b15aece3 850 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 851 lines += FmLINES(PL_formtarget);
a0d0e21e
LW
852 if (lines == 200) {
853 arg = t - linemark;
854 if (strnEQ(linemark, linemark - arg, arg))
cea2e8a9 855 DIE(aTHX_ "Runaway format");
a0d0e21e 856 }
1bd51a4c
IH
857 if (targ_is_utf8)
858 SvUTF8_on(PL_formtarget);
3280af22 859 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
860 SP = ORIGMARK;
861 RETURNOP(cLISTOP->op_first);
862 }
863 }
864 else {
865 t = linemark;
866 lines--;
867 }
868 break;
869
870 case FF_MORE:
5a34cab7
NC
871 {
872 const char *s = chophere;
873 const char *send = item + len;
874 if (chopspace) {
af68e756 875 while (isSPACE(*s) && (s < send))
5a34cab7 876 s++;
a0d0e21e 877 }
5a34cab7
NC
878 if (s < send) {
879 char *s1;
880 arg = fieldsize - itemsize;
881 if (arg) {
882 fieldsize -= arg;
883 while (arg-- > 0)
884 *t++ = ' ';
885 }
886 s1 = t - 3;
887 if (strnEQ(s1," ",3)) {
888 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
889 s1--;
890 }
891 *s1++ = '.';
892 *s1++ = '.';
893 *s1++ = '.';
a0d0e21e 894 }
5a34cab7 895 break;
a0d0e21e 896 }
a0d0e21e
LW
897 case FF_END:
898 *t = '\0';
b15aece3 899 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
900 if (targ_is_utf8)
901 SvUTF8_on(PL_formtarget);
3280af22 902 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
903 SP = ORIGMARK;
904 RETPUSHYES;
905 }
906 }
907}
908
909PP(pp_grepstart)
910{
27da23d5 911 dVAR; dSP;
a0d0e21e
LW
912 SV *src;
913
3280af22 914 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 915 (void)POPMARK;
54310121 916 if (GIMME_V == G_SCALAR)
0b024f31 917 XPUSHs(sv_2mortal(newSViv(0)));
533c011a 918 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 919 }
3280af22 920 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
921 pp_pushmark(); /* push dst */
922 pp_pushmark(); /* push src */
a0d0e21e
LW
923 ENTER; /* enter outer scope */
924
925 SAVETMPS;
59f00321
RGS
926 if (PL_op->op_private & OPpGREP_LEX)
927 SAVESPTR(PAD_SVl(PL_op->op_targ));
928 else
929 SAVE_DEFSV;
a0d0e21e 930 ENTER; /* enter inner scope */
7766f137 931 SAVEVPTR(PL_curpm);
a0d0e21e 932
3280af22 933 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 934 SvTEMP_off(src);
59f00321
RGS
935 if (PL_op->op_private & OPpGREP_LEX)
936 PAD_SVl(PL_op->op_targ) = src;
937 else
938 DEFSV = src;
a0d0e21e
LW
939
940 PUTBACK;
533c011a 941 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 942 pp_pushmark(); /* push top */
533c011a 943 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
944}
945
a0d0e21e
LW
946PP(pp_mapwhile)
947{
27da23d5 948 dVAR; dSP;
f54cb97a 949 const I32 gimme = GIMME_V;
544f3153 950 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
951 I32 count;
952 I32 shift;
953 SV** src;
ac27b0f5 954 SV** dst;
a0d0e21e 955
544f3153 956 /* first, move source pointer to the next item in the source list */
3280af22 957 ++PL_markstack_ptr[-1];
544f3153
GS
958
959 /* if there are new items, push them into the destination list */
4c90a460 960 if (items && gimme != G_VOID) {
544f3153
GS
961 /* might need to make room back there first */
962 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
963 /* XXX this implementation is very pessimal because the stack
964 * is repeatedly extended for every set of items. Is possible
965 * to do this without any stack extension or copying at all
966 * by maintaining a separate list over which the map iterates
18ef8bea 967 * (like foreach does). --gsar */
544f3153
GS
968
969 /* everything in the stack after the destination list moves
970 * towards the end the stack by the amount of room needed */
971 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
972
973 /* items to shift up (accounting for the moved source pointer) */
974 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
975
976 /* This optimization is by Ben Tilly and it does
977 * things differently from what Sarathy (gsar)
978 * is describing. The downside of this optimization is
979 * that leaves "holes" (uninitialized and hopefully unused areas)
980 * to the Perl stack, but on the other hand this
981 * shouldn't be a problem. If Sarathy's idea gets
982 * implemented, this optimization should become
983 * irrelevant. --jhi */
984 if (shift < count)
985 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 986
924508f0
GS
987 EXTEND(SP,shift);
988 src = SP;
989 dst = (SP += shift);
3280af22
NIS
990 PL_markstack_ptr[-1] += shift;
991 *PL_markstack_ptr += shift;
544f3153 992 while (count--)
a0d0e21e
LW
993 *dst-- = *src--;
994 }
544f3153 995 /* copy the new items down to the destination list */
ac27b0f5 996 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
997 if (gimme == G_ARRAY) {
998 while (items-- > 0)
999 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1000 }
bfed75c6 1001 else {
22023b26
TP
1002 /* scalar context: we don't care about which values map returns
1003 * (we use undef here). And so we certainly don't want to do mortal
1004 * copies of meaningless values. */
1005 while (items-- > 0) {
b988aa42 1006 (void)POPs;
22023b26
TP
1007 *dst-- = &PL_sv_undef;
1008 }
1009 }
a0d0e21e
LW
1010 }
1011 LEAVE; /* exit inner scope */
1012
1013 /* All done yet? */
3280af22 1014 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1015
1016 (void)POPMARK; /* pop top */
1017 LEAVE; /* exit outer scope */
1018 (void)POPMARK; /* pop src */
3280af22 1019 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1020 (void)POPMARK; /* pop dst */
3280af22 1021 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1022 if (gimme == G_SCALAR) {
7cc47870
RGS
1023 if (PL_op->op_private & OPpGREP_LEX) {
1024 SV* sv = sv_newmortal();
1025 sv_setiv(sv, items);
1026 PUSHs(sv);
1027 }
1028 else {
1029 dTARGET;
1030 XPUSHi(items);
1031 }
a0d0e21e 1032 }
54310121
PP
1033 else if (gimme == G_ARRAY)
1034 SP += items;
a0d0e21e
LW
1035 RETURN;
1036 }
1037 else {
1038 SV *src;
1039
1040 ENTER; /* enter inner scope */
7766f137 1041 SAVEVPTR(PL_curpm);
a0d0e21e 1042
544f3153 1043 /* set $_ to the new source item */
3280af22 1044 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1045 SvTEMP_off(src);
59f00321
RGS
1046 if (PL_op->op_private & OPpGREP_LEX)
1047 PAD_SVl(PL_op->op_targ) = src;
1048 else
1049 DEFSV = src;
a0d0e21e
LW
1050
1051 RETURNOP(cLOGOP->op_other);
1052 }
1053}
1054
a0d0e21e
LW
1055/* Range stuff. */
1056
1057PP(pp_range)
1058{
97aff369 1059 dVAR;
a0d0e21e 1060 if (GIMME == G_ARRAY)
1a67a97c 1061 return NORMAL;
538573f7 1062 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1063 return cLOGOP->op_other;
538573f7 1064 else
1a67a97c 1065 return NORMAL;
a0d0e21e
LW
1066}
1067
1068PP(pp_flip)
1069{
97aff369 1070 dVAR;
39644a26 1071 dSP;
a0d0e21e
LW
1072
1073 if (GIMME == G_ARRAY) {
1a67a97c 1074 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1075 }
1076 else {
1077 dTOPss;
44f8325f 1078 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1079 int flip = 0;
790090df 1080
bfed75c6 1081 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1082 if (GvIO(PL_last_in_gv)) {
1083 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1084 }
1085 else {
fafc274c 1086 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1087 if (gv && GvSV(gv))
1088 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1089 }
bfed75c6
AL
1090 } else {
1091 flip = SvTRUE(sv);
1092 }
1093 if (flip) {
a0d0e21e 1094 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1095 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1096 sv_setiv(targ, 1);
3e3baf6d 1097 SETs(targ);
a0d0e21e
LW
1098 RETURN;
1099 }
1100 else {
1101 sv_setiv(targ, 0);
924508f0 1102 SP--;
1a67a97c 1103 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1104 }
1105 }
c69006e4 1106 sv_setpvn(TARG, "", 0);
a0d0e21e
LW
1107 SETs(targ);
1108 RETURN;
1109 }
1110}
1111
8e9bbdb9
RGS
1112/* This code tries to decide if "$left .. $right" should use the
1113 magical string increment, or if the range is numeric (we make
1114 an exception for .."0" [#18165]). AMS 20021031. */
1115
1116#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1117 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1118 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1119 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1120 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1121 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1122
a0d0e21e
LW
1123PP(pp_flop)
1124{
97aff369 1125 dVAR; dSP;
a0d0e21e
LW
1126
1127 if (GIMME == G_ARRAY) {
1128 dPOPPOPssrl;
86cb7173 1129
5b295bef
RD
1130 SvGETMAGIC(left);
1131 SvGETMAGIC(right);
a0d0e21e 1132
8e9bbdb9 1133 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1134 register IV i, j;
1135 IV max;
4fe3f0fa
MHM
1136 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1137 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1138 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1139 i = SvIV(left);
1140 max = SvIV(right);
bbce6d69 1141 if (max >= i) {
c1ab3db2
AK
1142 j = max - i + 1;
1143 EXTEND_MORTAL(j);
1144 EXTEND(SP, j);
bbce6d69 1145 }
c1ab3db2
AK
1146 else
1147 j = 0;
1148 while (j--) {
901017d6 1149 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1150 PUSHs(sv);
1151 }
1152 }
1153 else {
44f8325f 1154 SV * const final = sv_mortalcopy(right);
13c5b33c 1155 STRLEN len;
823a54a3 1156 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1157
901017d6 1158 SV *sv = sv_mortalcopy(left);
13c5b33c 1159 SvPV_force_nolen(sv);
89ea2908 1160 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1161 XPUSHs(sv);
b15aece3 1162 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1163 break;
a0d0e21e
LW
1164 sv = sv_2mortal(newSVsv(sv));
1165 sv_inc(sv);
1166 }
a0d0e21e
LW
1167 }
1168 }
1169 else {
1170 dTOPss;
901017d6 1171 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1172 int flop = 0;
a0d0e21e 1173 sv_inc(targ);
4e3399f9
YST
1174
1175 if (PL_op->op_private & OPpFLIP_LINENUM) {
1176 if (GvIO(PL_last_in_gv)) {
1177 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1178 }
1179 else {
fafc274c 1180 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1181 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1182 }
1183 }
1184 else {
1185 flop = SvTRUE(sv);
1186 }
1187
1188 if (flop) {
a0d0e21e 1189 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1190 sv_catpvs(targ, "E0");
a0d0e21e
LW
1191 }
1192 SETs(targ);
1193 }
1194
1195 RETURN;
1196}
1197
1198/* Control. */
1199
27da23d5 1200static const char * const context_name[] = {
515afda2
NC
1201 "pseudo-block",
1202 "subroutine",
1203 "eval",
1204 "loop",
1205 "substitution",
1206 "block",
0d863452
RH
1207 "format",
1208 "given",
1209 "when"
515afda2
NC
1210};
1211
76e3520e 1212STATIC I32
06b5626a 1213S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1214{
97aff369 1215 dVAR;
a0d0e21e 1216 register I32 i;
a0d0e21e
LW
1217
1218 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1219 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1220 switch (CxTYPE(cx)) {
a0d0e21e 1221 case CXt_SUBST:
a0d0e21e 1222 case CXt_SUB:
7766f137 1223 case CXt_FORMAT:
a0d0e21e 1224 case CXt_EVAL:
0a753a76 1225 case CXt_NULL:
0d863452
RH
1226 case CXt_GIVEN:
1227 case CXt_WHEN:
e476b1b5 1228 if (ckWARN(WARN_EXITING))
515afda2
NC
1229 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1230 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1231 if (CxTYPE(cx) == CXt_NULL)
1232 return -1;
1233 break;
a0d0e21e 1234 case CXt_LOOP:
901017d6 1235 if ( !cx->blk_loop.label || strNE(label, cx->blk_loop.label) ) {
cea2e8a9 1236 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
68dc0745 1237 (long)i, cx->blk_loop.label));
a0d0e21e
LW
1238 continue;
1239 }
cea2e8a9 1240 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1241 return i;
1242 }
1243 }
1244 return i;
1245}
1246
0d863452
RH
1247
1248
e50aee73 1249I32
864dbfa3 1250Perl_dowantarray(pTHX)
e50aee73 1251{
97aff369 1252 dVAR;
f54cb97a 1253 const I32 gimme = block_gimme();
54310121
PP
1254 return (gimme == G_VOID) ? G_SCALAR : gimme;
1255}
1256
1257I32
864dbfa3 1258Perl_block_gimme(pTHX)
54310121 1259{
97aff369 1260 dVAR;
06b5626a 1261 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1262 if (cxix < 0)
46fc3d4c 1263 return G_VOID;
e50aee73 1264
54310121 1265 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1266 case G_VOID:
1267 return G_VOID;
54310121 1268 case G_SCALAR:
e50aee73 1269 return G_SCALAR;
54310121
PP
1270 case G_ARRAY:
1271 return G_ARRAY;
1272 default:
cea2e8a9 1273 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1274 /* NOTREACHED */
1275 return 0;
54310121 1276 }
e50aee73
AD
1277}
1278
78f9721b
SM
1279I32
1280Perl_is_lvalue_sub(pTHX)
1281{
97aff369 1282 dVAR;
06b5626a 1283 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1284 assert(cxix >= 0); /* We should only be called from inside subs */
1285
1286 if (cxstack[cxix].blk_sub.lval && CvLVALUE(cxstack[cxix].blk_sub.cv))
1287 return cxstack[cxix].blk_sub.lval;
1288 else
1289 return 0;
1290}
1291
76e3520e 1292STATIC I32
cea2e8a9 1293S_dopoptosub(pTHX_ I32 startingblock)
a0d0e21e 1294{
97aff369 1295 dVAR;
2c375eb9
GS
1296 return dopoptosub_at(cxstack, startingblock);
1297}
1298
1299STATIC I32
901017d6 1300S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1301{
97aff369 1302 dVAR;
a0d0e21e 1303 I32 i;
a0d0e21e 1304 for (i = startingblock; i >= 0; i--) {
901017d6 1305 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1306 switch (CxTYPE(cx)) {
a0d0e21e
LW
1307 default:
1308 continue;
1309 case CXt_EVAL:
1310 case CXt_SUB:
7766f137 1311 case CXt_FORMAT:
cea2e8a9 1312 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1313 return i;
1314 }
1315 }
1316 return i;
1317}
1318
76e3520e 1319STATIC I32
cea2e8a9 1320S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1321{
97aff369 1322 dVAR;
a0d0e21e 1323 I32 i;
a0d0e21e 1324 for (i = startingblock; i >= 0; i--) {
06b5626a 1325 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1326 switch (CxTYPE(cx)) {
a0d0e21e
LW
1327 default:
1328 continue;
1329 case CXt_EVAL:
cea2e8a9 1330 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1331 return i;
1332 }
1333 }
1334 return i;
1335}
1336
76e3520e 1337STATIC I32
cea2e8a9 1338S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1339{
97aff369 1340 dVAR;
a0d0e21e 1341 I32 i;
a0d0e21e 1342 for (i = startingblock; i >= 0; i--) {
901017d6 1343 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1344 switch (CxTYPE(cx)) {
a0d0e21e 1345 case CXt_SUBST:
a0d0e21e 1346 case CXt_SUB:
7766f137 1347 case CXt_FORMAT:
a0d0e21e 1348 case CXt_EVAL:
0a753a76 1349 case CXt_NULL:
e476b1b5 1350 if (ckWARN(WARN_EXITING))
515afda2
NC
1351 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1352 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1353 if ((CxTYPE(cx)) == CXt_NULL)
1354 return -1;
1355 break;
a0d0e21e 1356 case CXt_LOOP:
cea2e8a9 1357 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1358 return i;
1359 }
1360 }
1361 return i;
1362}
1363
0d863452
RH
1364STATIC I32
1365S_dopoptogiven(pTHX_ I32 startingblock)
1366{
97aff369 1367 dVAR;
0d863452
RH
1368 I32 i;
1369 for (i = startingblock; i >= 0; i--) {
1370 register const PERL_CONTEXT *cx = &cxstack[i];
1371 switch (CxTYPE(cx)) {
1372 default:
1373 continue;
1374 case CXt_GIVEN:
1375 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1376 return i;
1377 case CXt_LOOP:
1378 if (CxFOREACHDEF(cx)) {
1379 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1380 return i;
1381 }
1382 }
1383 }
1384 return i;
1385}
1386
1387STATIC I32
1388S_dopoptowhen(pTHX_ I32 startingblock)
1389{
97aff369 1390 dVAR;
0d863452
RH
1391 I32 i;
1392 for (i = startingblock; i >= 0; i--) {
1393 register const PERL_CONTEXT *cx = &cxstack[i];
1394 switch (CxTYPE(cx)) {
1395 default:
1396 continue;
1397 case CXt_WHEN:
1398 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1399 return i;
1400 }
1401 }
1402 return i;
1403}
1404
a0d0e21e 1405void
864dbfa3 1406Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1407{
97aff369 1408 dVAR;
a0d0e21e
LW
1409 I32 optype;
1410
1411 while (cxstack_ix > cxix) {
b0d9ce38 1412 SV *sv;
06b5626a 1413 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1414 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1415 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1416 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1417 switch (CxTYPE(cx)) {
c90c0ff4
PP
1418 case CXt_SUBST:
1419 POPSUBST(cx);
1420 continue; /* not break */
a0d0e21e 1421 case CXt_SUB:
b0d9ce38
GS
1422 POPSUB(cx,sv);
1423 LEAVESUB(sv);
a0d0e21e
LW
1424 break;
1425 case CXt_EVAL:
1426 POPEVAL(cx);
1427 break;
1428 case CXt_LOOP:
1429 POPLOOP(cx);
1430 break;
0a753a76 1431 case CXt_NULL:
a0d0e21e 1432 break;
7766f137
GS
1433 case CXt_FORMAT:
1434 POPFORMAT(cx);
1435 break;
a0d0e21e 1436 }
c90c0ff4 1437 cxstack_ix--;
a0d0e21e 1438 }
1b6737cc 1439 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1440}
1441
5a844595
GS
1442void
1443Perl_qerror(pTHX_ SV *err)
1444{
97aff369 1445 dVAR;
5a844595
GS
1446 if (PL_in_eval)
1447 sv_catsv(ERRSV, err);
1448 else if (PL_errors)
1449 sv_catsv(PL_errors, err);
1450 else
95b63a38 1451 Perl_warn(aTHX_ "%"SVf, (void*)err);
5a844595
GS
1452 ++PL_error_count;
1453}
1454
a0d0e21e 1455OP *
35a4481c 1456Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1457{
27da23d5 1458 dVAR;
87582a92 1459
3280af22 1460 if (PL_in_eval) {
a0d0e21e 1461 I32 cxix;
a0d0e21e 1462 I32 gimme;
a0d0e21e 1463
4e6ea2c3 1464 if (message) {
faef0170 1465 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1466 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1467 SV * const err = ERRSV;
c445ea15 1468 const char *e = NULL;
98eae8f5 1469 if (!SvPOK(err))
c69006e4 1470 sv_setpvn(err,"",0);
98eae8f5 1471 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1472 STRLEN len;
349d4f2f 1473 e = SvPV_const(err, len);
0510663f 1474 e += len - msglen;
98eae8f5 1475 if (*e != *message || strNE(e,message))
c445ea15 1476 e = NULL;
98eae8f5
GS
1477 }
1478 if (!e) {
1479 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1480 sv_catpvn(err, prefix, sizeof(prefix)-1);
1481 sv_catpvn(err, message, msglen);
e476b1b5 1482 if (ckWARN(WARN_MISC)) {
504618e9 1483 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1484 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1485 }
4633a7c4 1486 }
4633a7c4 1487 }
1aa99e6b 1488 else {
06bf62c7 1489 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1490 }
4633a7c4 1491 }
4e6ea2c3 1492
5a844595
GS
1493 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1494 && PL_curstackinfo->si_prev)
1495 {
bac4b2ad 1496 dounwind(-1);
d3acc0f7 1497 POPSTACK;
bac4b2ad 1498 }
e336de0d 1499
a0d0e21e
LW
1500 if (cxix >= 0) {
1501 I32 optype;
35a4481c 1502 register PERL_CONTEXT *cx;
901017d6 1503 SV **newsp;
a0d0e21e
LW
1504
1505 if (cxix < cxstack_ix)
1506 dounwind(cxix);
1507
3280af22 1508 POPBLOCK(cx,PL_curpm);
6b35e009 1509 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1510 if (!message)
349d4f2f 1511 message = SvPVx_const(ERRSV, msglen);
bf49b057
GS
1512 PerlIO_write(Perl_error_log, "panic: die ", 11);
1513 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1514 my_exit(1);
1515 }
1516 POPEVAL(cx);
1517
1518 if (gimme == G_SCALAR)
3280af22
NIS
1519 *++newsp = &PL_sv_undef;
1520 PL_stack_sp = newsp;
a0d0e21e
LW
1521
1522 LEAVE;
748a9306 1523
7fb6a879
GS
1524 /* LEAVE could clobber PL_curcop (see save_re_context())
1525 * XXX it might be better to find a way to avoid messing with
1526 * PL_curcop in save_re_context() instead, but this is a more
1527 * minimal fix --GSAR */
1528 PL_curcop = cx->blk_oldcop;
1529
7a2e2cd6 1530 if (optype == OP_REQUIRE) {
44f8325f 1531 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1532 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1533 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1534 &PL_sv_undef, 0);
5a844595
GS
1535 DIE(aTHX_ "%sCompilation failed in require",
1536 *msg ? msg : "Unknown error\n");
7a2e2cd6 1537 }
f39bc417
DM
1538 assert(CxTYPE(cx) == CXt_EVAL);
1539 return cx->blk_eval.retop;
a0d0e21e
LW
1540 }
1541 }
9cc2fdd3 1542 if (!message)
349d4f2f 1543 message = SvPVx_const(ERRSV, msglen);
87582a92 1544
7ff03255 1545 write_to_stderr(message, msglen);
f86702cc
PP
1546 my_failure_exit();
1547 /* NOTREACHED */
a0d0e21e
LW
1548 return 0;
1549}
1550
1551PP(pp_xor)
1552{
97aff369 1553 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1554 if (SvTRUE(left) != SvTRUE(right))
1555 RETSETYES;
1556 else
1557 RETSETNO;
1558}
1559
a0d0e21e
LW
1560PP(pp_caller)
1561{
97aff369 1562 dVAR;
39644a26 1563 dSP;
a0d0e21e 1564 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1565 register const PERL_CONTEXT *cx;
1566 register const PERL_CONTEXT *ccstack = cxstack;
1567 const PERL_SI *top_si = PL_curstackinfo;
54310121 1568 I32 gimme;
06b5626a 1569 const char *stashname;
a0d0e21e
LW
1570 I32 count = 0;
1571
1572 if (MAXARG)
1573 count = POPi;
27d41816 1574
a0d0e21e 1575 for (;;) {
2c375eb9
GS
1576 /* we may be in a higher stacklevel, so dig down deeper */
1577 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1578 top_si = top_si->si_prev;
1579 ccstack = top_si->si_cxstack;
1580 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1581 }
a0d0e21e 1582 if (cxix < 0) {
27d41816
DM
1583 if (GIMME != G_ARRAY) {
1584 EXTEND(SP, 1);
a0d0e21e 1585 RETPUSHUNDEF;
27d41816 1586 }
a0d0e21e
LW
1587 RETURN;
1588 }
f2a7f298 1589 /* caller() should not report the automatic calls to &DB::sub */
1590 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1591 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1592 count++;
1593 if (!count--)
1594 break;
2c375eb9 1595 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1596 }
2c375eb9
GS
1597
1598 cx = &ccstack[cxix];
7766f137 1599 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1600 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1601 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1602 field below is defined for any cx. */
f2a7f298 1603 /* caller() should not report the automatic calls to &DB::sub */
1604 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1605 cx = &ccstack[dbcxix];
06a5b730
PP
1606 }
1607
ed094faf 1608 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1609 if (GIMME != G_ARRAY) {
27d41816 1610 EXTEND(SP, 1);
ed094faf 1611 if (!stashname)
3280af22 1612 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1613 else {
1614 dTARGET;
ed094faf 1615 sv_setpv(TARG, stashname);
49d8d3a1
MB
1616 PUSHs(TARG);
1617 }
a0d0e21e
LW
1618 RETURN;
1619 }
a0d0e21e 1620
b3ca2e83 1621 EXTEND(SP, 11);
27d41816 1622
ed094faf 1623 if (!stashname)
3280af22 1624 PUSHs(&PL_sv_undef);
49d8d3a1 1625 else
ed094faf 1626 PUSHs(sv_2mortal(newSVpv(stashname, 0)));
248c2a4d 1627 PUSHs(sv_2mortal(newSVpv(OutCopFILE(cx->blk_oldcop), 0)));
57843af0 1628 PUSHs(sv_2mortal(newSViv((I32)CopLINE(cx->blk_oldcop))));
a0d0e21e
LW
1629 if (!MAXARG)
1630 RETURN;
7766f137 1631 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1632 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1633 /* So is ccstack[dbcxix]. */
07b8c804 1634 if (isGV(cvgv)) {
561b68a9 1635 SV * const sv = newSV(0);
c445ea15 1636 gv_efullname3(sv, cvgv, NULL);
07b8c804
RGS
1637 PUSHs(sv_2mortal(sv));
1638 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1639 }
1640 else {
396482e1 1641 PUSHs(sv_2mortal(newSVpvs("(unknown)")));
72699b0f 1642 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804 1643 }
a0d0e21e
LW
1644 }
1645 else {
396482e1 1646 PUSHs(sv_2mortal(newSVpvs("(eval)")));
a0d0e21e
LW
1647 PUSHs(sv_2mortal(newSViv(0)));
1648 }
54310121
PP
1649 gimme = (I32)cx->blk_gimme;
1650 if (gimme == G_VOID)
3280af22 1651 PUSHs(&PL_sv_undef);
54310121
PP
1652 else
1653 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
6b35e009 1654 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1655 /* eval STRING */
06a5b730 1656 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1657 PUSHs(cx->blk_eval.cur_text);
3280af22 1658 PUSHs(&PL_sv_no);
0f79a09d 1659 }
811a4de9 1660 /* require */
0f79a09d
GS
1661 else if (cx->blk_eval.old_namesv) {
1662 PUSHs(sv_2mortal(newSVsv(cx->blk_eval.old_namesv)));
3280af22 1663 PUSHs(&PL_sv_yes);
06a5b730 1664 }
811a4de9
GS
1665 /* eval BLOCK (try blocks have old_namesv == 0) */
1666 else {
1667 PUSHs(&PL_sv_undef);
1668 PUSHs(&PL_sv_undef);
1669 }
4633a7c4 1670 }
a682de96
GS
1671 else {
1672 PUSHs(&PL_sv_undef);
1673 PUSHs(&PL_sv_undef);
1674 }
1675 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
ed094faf 1676 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1677 {
66a1b24b
AL
1678 AV * const ary = cx->blk_sub.argarray;
1679 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1680
3280af22 1681 if (!PL_dbargs) {
71315bf2 1682 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1683 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1684 GvMULTI_on(tmpgv);
3ddcf04c 1685 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1686 }
1687
3280af22
NIS
1688 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1689 av_extend(PL_dbargs, AvFILLp(ary) + off);
1690 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1691 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1692 }
f3aa04c2
GS
1693 /* XXX only hints propagated via op_private are currently
1694 * visible (others are not easily accessible, since they
1695 * use the global PL_hints) */
623e6609 1696 PUSHs(sv_2mortal(newSViv(CopHINTS_get(cx->blk_oldcop))));
e476b1b5
GS
1697 {
1698 SV * mask ;
72dc9ed5 1699 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1700
ac27b0f5 1701 if (old_warnings == pWARN_NONE ||
114bafba 1702 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1703 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1704 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1705 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1706 /* Get the bit mask for $warnings::Bits{all}, because
1707 * it could have been extended by warnings::register */
1708 SV **bits_all;
0bd48802 1709 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1710 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1711 mask = newSVsv(*bits_all);
1712 }
1713 else {
1714 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1715 }
1716 }
e476b1b5 1717 else
72dc9ed5 1718 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
e476b1b5
GS
1719 PUSHs(sv_2mortal(mask));
1720 }
b3ca2e83 1721
c28fe1ec 1722 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1723 sv_2mortal(newRV_noinc(
c28fe1ec
NC
1724 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1725 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1726 : &PL_sv_undef);
a0d0e21e
LW
1727 RETURN;
1728}
1729
a0d0e21e
LW
1730PP(pp_reset)
1731{
97aff369 1732 dVAR;
39644a26 1733 dSP;
0bd48802 1734 const char * const tmps = (MAXARG < 1) ? "" : POPpconstx;
11faa288 1735 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1736 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1737 RETURN;
1738}
1739
dd2155a4
DM
1740/* like pp_nextstate, but used instead when the debugger is active */
1741
a0d0e21e
LW
1742PP(pp_dbstate)
1743{
27da23d5 1744 dVAR;
533c011a 1745 PL_curcop = (COP*)PL_op;
a0d0e21e 1746 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1747 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1748 FREETMPS;
1749
5df8de69
DM
1750 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1751 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1752 {
39644a26 1753 dSP;
c09156bb 1754 register PERL_CONTEXT *cx;
f54cb97a 1755 const I32 gimme = G_ARRAY;
eb160463 1756 U8 hasargs;
0bd48802
AL
1757 GV * const gv = PL_DBgv;
1758 register CV * const cv = GvCV(gv);
a0d0e21e 1759
a0d0e21e 1760 if (!cv)
cea2e8a9 1761 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1762
aea4f609
DM
1763 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1764 /* don't do recursive DB::DB call */
a0d0e21e 1765 return NORMAL;
748a9306 1766
4633a7c4
LW
1767 ENTER;
1768 SAVETMPS;
1769
3280af22 1770 SAVEI32(PL_debug);
55497cff 1771 SAVESTACK_POS();
3280af22 1772 PL_debug = 0;
748a9306 1773 hasargs = 0;
924508f0 1774 SPAGAIN;
748a9306 1775
aed2304a 1776 if (CvISXSUB(cv)) {
c127bd3a
SF
1777 CvDEPTH(cv)++;
1778 PUSHMARK(SP);
1779 (void)(*CvXSUB(cv))(aTHX_ cv);
1780 CvDEPTH(cv)--;
1781 FREETMPS;
1782 LEAVE;
1783 return NORMAL;
1784 }
1785 else {
1786 PUSHBLOCK(cx, CXt_SUB, SP);
1787 PUSHSUB_DB(cx);
1788 cx->blk_sub.retop = PL_op->op_next;
1789 CvDEPTH(cv)++;
1790 SAVECOMPPAD();
1791 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1792 RETURNOP(CvSTART(cv));
1793 }
a0d0e21e
LW
1794 }
1795 else
1796 return NORMAL;
1797}
1798
a0d0e21e
LW
1799PP(pp_enteriter)
1800{
27da23d5 1801 dVAR; dSP; dMARK;
c09156bb 1802 register PERL_CONTEXT *cx;
f54cb97a 1803 const I32 gimme = GIMME_V;
a0d0e21e 1804 SV **svp;
0d863452 1805 U32 cxtype = CXt_LOOP | CXp_FOREACH;
7766f137
GS
1806#ifdef USE_ITHREADS
1807 void *iterdata;
1808#endif
a0d0e21e 1809
4633a7c4
LW
1810 ENTER;
1811 SAVETMPS;
1812
533c011a 1813 if (PL_op->op_targ) {
14f338dc
DM
1814 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1815 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1816 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1817 SVs_PADSTALE, SVs_PADSTALE);
1818 }
c3564e5c 1819#ifndef USE_ITHREADS
dd2155a4 1820 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
54b9620d 1821 SAVESPTR(*svp);
c3564e5c
GS
1822#else
1823 SAVEPADSV(PL_op->op_targ);
cbfa9890 1824 iterdata = INT2PTR(void*, PL_op->op_targ);
7766f137
GS
1825 cxtype |= CXp_PADVAR;
1826#endif
54b9620d
MB
1827 }
1828 else {
0bd48802 1829 GV * const gv = (GV*)POPs;
7766f137 1830 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1831 SAVEGENERICSV(*svp);
561b68a9 1832 *svp = newSV(0);
7766f137
GS
1833#ifdef USE_ITHREADS
1834 iterdata = (void*)gv;
1835#endif
54b9620d 1836 }
4633a7c4 1837
0d863452
RH
1838 if (PL_op->op_private & OPpITER_DEF)
1839 cxtype |= CXp_FOR_DEF;
1840
a0d0e21e
LW
1841 ENTER;
1842
7766f137
GS
1843 PUSHBLOCK(cx, cxtype, SP);
1844#ifdef USE_ITHREADS
1845 PUSHLOOP(cx, iterdata, MARK);
1846#else
a0d0e21e 1847 PUSHLOOP(cx, svp, MARK);
7766f137 1848#endif
533c011a 1849 if (PL_op->op_flags & OPf_STACKED) {
44a8e56a 1850 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
89ea2908
GA
1851 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1852 dPOPss;
0bd48802 1853 SV * const right = (SV*)cx->blk_loop.iterary;
984a4bea
RD
1854 SvGETMAGIC(sv);
1855 SvGETMAGIC(right);
4fe3f0fa
MHM
1856 if (RANGE_IS_NUMERIC(sv,right)) {
1857 if ((SvOK(sv) && SvNV(sv) < IV_MIN) ||
1858 (SvOK(right) && SvNV(right) >= IV_MAX))
076d9a11
MHM
1859 DIE(aTHX_ "Range iterator outside integer range");
1860 cx->blk_loop.iterix = SvIV(sv);
4fe3f0fa 1861 cx->blk_loop.itermax = SvIV(right);
d4665a05
DM
1862#ifdef DEBUGGING
1863 /* for correct -Dstv display */
1864 cx->blk_oldsp = sp - PL_stack_base;
1865#endif
89ea2908 1866 }
3f63a782 1867 else {
89ea2908 1868 cx->blk_loop.iterlval = newSVsv(sv);
13c5b33c 1869 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
10516c54 1870 (void) SvPV_nolen_const(right);
3f63a782 1871 }
89ea2908 1872 }
ef3e5ea9 1873 else if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1874 cx->blk_loop.itermax = 0;
1875 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary) + 1;
ef3e5ea9
NC
1876
1877 }
89ea2908 1878 }
4633a7c4 1879 else {
3280af22
NIS
1880 cx->blk_loop.iterary = PL_curstack;
1881 AvFILLp(PL_curstack) = SP - PL_stack_base;
ef3e5ea9 1882 if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1883 cx->blk_loop.itermax = MARK - PL_stack_base + 1;
1884 cx->blk_loop.iterix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1885 }
1886 else {
1887 cx->blk_loop.iterix = MARK - PL_stack_base;
1888 }
4633a7c4 1889 }
a0d0e21e
LW
1890
1891 RETURN;
1892}
1893
1894PP(pp_enterloop)
1895{
27da23d5 1896 dVAR; dSP;
c09156bb 1897 register PERL_CONTEXT *cx;
f54cb97a 1898 const I32 gimme = GIMME_V;
a0d0e21e
LW
1899
1900 ENTER;
1901 SAVETMPS;
1902 ENTER;
1903
1904 PUSHBLOCK(cx, CXt_LOOP, SP);
1905 PUSHLOOP(cx, 0, SP);
1906
1907 RETURN;
1908}
1909
1910PP(pp_leaveloop)
1911{
27da23d5 1912 dVAR; dSP;
c09156bb 1913 register PERL_CONTEXT *cx;
a0d0e21e
LW
1914 I32 gimme;
1915 SV **newsp;
1916 PMOP *newpm;
1917 SV **mark;
1918
1919 POPBLOCK(cx,newpm);
3a1b2b9e 1920 assert(CxTYPE(cx) == CXt_LOOP);
4fdae800 1921 mark = newsp;
a8bba7fa 1922 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1923
a1f49e72 1924 TAINT_NOT;
54310121 1925 if (gimme == G_VOID)
6f207bd3 1926 NOOP;
54310121
PP
1927 else if (gimme == G_SCALAR) {
1928 if (mark < SP)
1929 *++newsp = sv_mortalcopy(*SP);
1930 else
3280af22 1931 *++newsp = &PL_sv_undef;
a0d0e21e
LW
1932 }
1933 else {
a1f49e72 1934 while (mark < SP) {
a0d0e21e 1935 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
1936 TAINT_NOT; /* Each item is independent */
1937 }
a0d0e21e 1938 }
f86702cc
PP
1939 SP = newsp;
1940 PUTBACK;
1941
a8bba7fa 1942 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 1943 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 1944
a0d0e21e
LW
1945 LEAVE;
1946 LEAVE;
1947
f86702cc 1948 return NORMAL;
a0d0e21e
LW
1949}
1950
1951PP(pp_return)
1952{
27da23d5 1953 dVAR; dSP; dMARK;
c09156bb 1954 register PERL_CONTEXT *cx;
f86702cc 1955 bool popsub2 = FALSE;
b45de488 1956 bool clear_errsv = FALSE;
a0d0e21e
LW
1957 I32 gimme;
1958 SV **newsp;
1959 PMOP *newpm;
1960 I32 optype = 0;
b0d9ce38 1961 SV *sv;
f39bc417 1962 OP *retop;
a0d0e21e 1963
0bd48802
AL
1964 const I32 cxix = dopoptosub(cxstack_ix);
1965
9850bf21
RH
1966 if (cxix < 0) {
1967 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
1968 * sort block, which is a CXt_NULL
1969 * not a CXt_SUB */
1970 dounwind(0);
d7507f74
RH
1971 PL_stack_base[1] = *PL_stack_sp;
1972 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
1973 return 0;
1974 }
9850bf21
RH
1975 else
1976 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 1977 }
a0d0e21e
LW
1978 if (cxix < cxstack_ix)
1979 dounwind(cxix);
1980
d7507f74
RH
1981 if (CxMULTICALL(&cxstack[cxix])) {
1982 gimme = cxstack[cxix].blk_gimme;
1983 if (gimme == G_VOID)
1984 PL_stack_sp = PL_stack_base;
1985 else if (gimme == G_SCALAR) {
1986 PL_stack_base[1] = *PL_stack_sp;
1987 PL_stack_sp = PL_stack_base + 1;
1988 }
9850bf21 1989 return 0;
d7507f74 1990 }
9850bf21 1991
a0d0e21e 1992 POPBLOCK(cx,newpm);
6b35e009 1993 switch (CxTYPE(cx)) {
a0d0e21e 1994 case CXt_SUB:
f86702cc 1995 popsub2 = TRUE;
f39bc417 1996 retop = cx->blk_sub.retop;
5dd42e15 1997 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
1998 break;
1999 case CXt_EVAL:
b45de488
GS
2000 if (!(PL_in_eval & EVAL_KEEPERR))
2001 clear_errsv = TRUE;
a0d0e21e 2002 POPEVAL(cx);
f39bc417 2003 retop = cx->blk_eval.retop;
1d76a5c3
GS
2004 if (CxTRYBLOCK(cx))
2005 break;
067f92a0 2006 lex_end();
748a9306
LW
2007 if (optype == OP_REQUIRE &&
2008 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2009 {
54310121 2010 /* Unassume the success we assumed earlier. */
901017d6 2011 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2012 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
95b63a38 2013 DIE(aTHX_ "%"SVf" did not return a true value", (void*)nsv);
748a9306 2014 }
a0d0e21e 2015 break;
7766f137
GS
2016 case CXt_FORMAT:
2017 POPFORMAT(cx);
f39bc417 2018 retop = cx->blk_sub.retop;
7766f137 2019 break;
a0d0e21e 2020 default:
cea2e8a9 2021 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2022 }
2023
a1f49e72 2024 TAINT_NOT;
a0d0e21e 2025 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2026 if (MARK < SP) {
2027 if (popsub2) {
a8bba7fa 2028 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2029 if (SvTEMP(TOPs)) {
2030 *++newsp = SvREFCNT_inc(*SP);
2031 FREETMPS;
2032 sv_2mortal(*newsp);
959e3673
GS
2033 }
2034 else {
2035 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2036 FREETMPS;
959e3673
GS
2037 *++newsp = sv_mortalcopy(sv);
2038 SvREFCNT_dec(sv);
a29cdaf0 2039 }
959e3673
GS
2040 }
2041 else
a29cdaf0 2042 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2043 }
2044 else
a29cdaf0 2045 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2046 }
2047 else
3280af22 2048 *++newsp = &PL_sv_undef;
a0d0e21e 2049 }
54310121 2050 else if (gimme == G_ARRAY) {
a1f49e72 2051 while (++MARK <= SP) {
f86702cc
PP
2052 *++newsp = (popsub2 && SvTEMP(*MARK))
2053 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2054 TAINT_NOT; /* Each item is independent */
2055 }
a0d0e21e 2056 }
3280af22 2057 PL_stack_sp = newsp;
a0d0e21e 2058
5dd42e15 2059 LEAVE;
f86702cc
PP
2060 /* Stack values are safe: */
2061 if (popsub2) {
5dd42e15 2062 cxstack_ix--;
b0d9ce38 2063 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2064 }
b0d9ce38 2065 else
c445ea15 2066 sv = NULL;
3280af22 2067 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2068
b0d9ce38 2069 LEAVESUB(sv);
b45de488 2070 if (clear_errsv)
c69006e4 2071 sv_setpvn(ERRSV,"",0);
f39bc417 2072 return retop;
a0d0e21e
LW
2073}
2074
2075PP(pp_last)
2076{
27da23d5 2077 dVAR; dSP;
a0d0e21e 2078 I32 cxix;
c09156bb 2079 register PERL_CONTEXT *cx;
f86702cc 2080 I32 pop2 = 0;
a0d0e21e 2081 I32 gimme;
8772537c 2082 I32 optype;
a0d0e21e
LW
2083 OP *nextop;
2084 SV **newsp;
2085 PMOP *newpm;
a8bba7fa 2086 SV **mark;
c445ea15 2087 SV *sv = NULL;
9d4ba2ae 2088
a0d0e21e 2089
533c011a 2090 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2091 cxix = dopoptoloop(cxstack_ix);
2092 if (cxix < 0)
a651a37d 2093 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2094 }
2095 else {
2096 cxix = dopoptolabel(cPVOP->op_pv);
2097 if (cxix < 0)
cea2e8a9 2098 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2099 }
2100 if (cxix < cxstack_ix)
2101 dounwind(cxix);
2102
2103 POPBLOCK(cx,newpm);
5dd42e15 2104 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2105 mark = newsp;
6b35e009 2106 switch (CxTYPE(cx)) {
a0d0e21e 2107 case CXt_LOOP:
f86702cc 2108 pop2 = CXt_LOOP;
a8bba7fa
GS
2109 newsp = PL_stack_base + cx->blk_loop.resetsp;
2110 nextop = cx->blk_loop.last_op->op_next;
a0d0e21e 2111 break;
f86702cc 2112 case CXt_SUB:
f86702cc 2113 pop2 = CXt_SUB;
f39bc417 2114 nextop = cx->blk_sub.retop;
a0d0e21e 2115 break;
f86702cc
PP
2116 case CXt_EVAL:
2117 POPEVAL(cx);
f39bc417 2118 nextop = cx->blk_eval.retop;
a0d0e21e 2119 break;
7766f137
GS
2120 case CXt_FORMAT:
2121 POPFORMAT(cx);
f39bc417 2122 nextop = cx->blk_sub.retop;
7766f137 2123 break;
a0d0e21e 2124 default:
cea2e8a9 2125 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2126 }
2127
a1f49e72 2128 TAINT_NOT;
a0d0e21e 2129 if (gimme == G_SCALAR) {
f86702cc
PP
2130 if (MARK < SP)
2131 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2132 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2133 else
3280af22 2134 *++newsp = &PL_sv_undef;
a0d0e21e 2135 }
54310121 2136 else if (gimme == G_ARRAY) {
a1f49e72 2137 while (++MARK <= SP) {
f86702cc
PP
2138 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2139 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2140 TAINT_NOT; /* Each item is independent */
2141 }
f86702cc
PP
2142 }
2143 SP = newsp;
2144 PUTBACK;
2145
5dd42e15
DM
2146 LEAVE;
2147 cxstack_ix--;
f86702cc
PP
2148 /* Stack values are safe: */
2149 switch (pop2) {
2150 case CXt_LOOP:
a8bba7fa 2151 POPLOOP(cx); /* release loop vars ... */
4fdae800 2152 LEAVE;
f86702cc
PP
2153 break;
2154 case CXt_SUB:
b0d9ce38 2155 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2156 break;
a0d0e21e 2157 }
3280af22 2158 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2159
b0d9ce38 2160 LEAVESUB(sv);
9d4ba2ae
AL
2161 PERL_UNUSED_VAR(optype);
2162 PERL_UNUSED_VAR(gimme);
f86702cc 2163 return nextop;
a0d0e21e
LW
2164}
2165
2166PP(pp_next)
2167{
27da23d5 2168 dVAR;
a0d0e21e 2169 I32 cxix;
c09156bb 2170 register PERL_CONTEXT *cx;
85538317 2171 I32 inner;
a0d0e21e 2172
533c011a 2173 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2174 cxix = dopoptoloop(cxstack_ix);
2175 if (cxix < 0)
a651a37d 2176 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2177 }
2178 else {
2179 cxix = dopoptolabel(cPVOP->op_pv);
2180 if (cxix < 0)
cea2e8a9 2181 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2182 }
2183 if (cxix < cxstack_ix)
2184 dounwind(cxix);
2185
85538317
GS
2186 /* clear off anything above the scope we're re-entering, but
2187 * save the rest until after a possible continue block */
2188 inner = PL_scopestack_ix;
1ba6ee2b 2189 TOPBLOCK(cx);
85538317
GS
2190 if (PL_scopestack_ix < inner)
2191 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2192 PL_curcop = cx->blk_oldcop;
1ba6ee2b 2193 return cx->blk_loop.next_op;
a0d0e21e
LW
2194}
2195
2196PP(pp_redo)
2197{
27da23d5 2198 dVAR;
a0d0e21e 2199 I32 cxix;
c09156bb 2200 register PERL_CONTEXT *cx;
a0d0e21e 2201 I32 oldsave;
a034e688 2202 OP* redo_op;
a0d0e21e 2203
533c011a 2204 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2205 cxix = dopoptoloop(cxstack_ix);
2206 if (cxix < 0)
a651a37d 2207 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2208 }
2209 else {
2210 cxix = dopoptolabel(cPVOP->op_pv);
2211 if (cxix < 0)
cea2e8a9 2212 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2213 }
2214 if (cxix < cxstack_ix)
2215 dounwind(cxix);
2216
a034e688
DM
2217 redo_op = cxstack[cxix].blk_loop.redo_op;
2218 if (redo_op->op_type == OP_ENTER) {
2219 /* pop one less context to avoid $x being freed in while (my $x..) */
2220 cxstack_ix++;
2221 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2222 redo_op = redo_op->op_next;
2223 }
2224
a0d0e21e 2225 TOPBLOCK(cx);
3280af22 2226 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2227 LEAVE_SCOPE(oldsave);
936c78b5 2228 FREETMPS;
3a1b2b9e 2229 PL_curcop = cx->blk_oldcop;
a034e688 2230 return redo_op;
a0d0e21e
LW
2231}
2232
0824fdcb 2233STATIC OP *
bfed75c6 2234S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2235{
97aff369 2236 dVAR;
a0d0e21e 2237 OP **ops = opstack;
bfed75c6 2238 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2239
fc36a67e 2240 if (ops >= oplimit)
cea2e8a9 2241 Perl_croak(aTHX_ too_deep);
11343788
MB
2242 if (o->op_type == OP_LEAVE ||
2243 o->op_type == OP_SCOPE ||
2244 o->op_type == OP_LEAVELOOP ||
33d34e4c 2245 o->op_type == OP_LEAVESUB ||
11343788 2246 o->op_type == OP_LEAVETRY)
fc36a67e 2247 {
5dc0d613 2248 *ops++ = cUNOPo->op_first;
fc36a67e 2249 if (ops >= oplimit)
cea2e8a9 2250 Perl_croak(aTHX_ too_deep);
fc36a67e 2251 }
c4aa4e48 2252 *ops = 0;
11343788 2253 if (o->op_flags & OPf_KIDS) {
aec46f14 2254 OP *kid;
a0d0e21e 2255 /* First try all the kids at this level, since that's likeliest. */
11343788 2256 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS
2257 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2258 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW
2259 return kid;
2260 }
11343788 2261 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2262 if (kid == PL_lastgotoprobe)
a0d0e21e 2263 continue;
ed8d0fe2
SM
2264 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2265 if (ops == opstack)
2266 *ops++ = kid;
2267 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2268 ops[-1]->op_type == OP_DBSTATE)
2269 ops[-1] = kid;
2270 else
2271 *ops++ = kid;
2272 }
155aba94 2273 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2274 return o;
a0d0e21e
LW
2275 }
2276 }
c4aa4e48 2277 *ops = 0;
a0d0e21e
LW
2278 return 0;
2279}
2280
a0d0e21e
LW
2281PP(pp_goto)
2282{
27da23d5 2283 dVAR; dSP;
cbbf8932 2284 OP *retop = NULL;
a0d0e21e 2285 I32 ix;
c09156bb 2286 register PERL_CONTEXT *cx;
fc36a67e
PP
2287#define GOTO_DEPTH 64
2288 OP *enterops[GOTO_DEPTH];
cbbf8932 2289 const char *label = NULL;
bfed75c6
AL
2290 const bool do_dump = (PL_op->op_type == OP_DUMP);
2291 static const char must_have_label[] = "goto must have label";
a0d0e21e 2292
533c011a 2293 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2294 SV * const sv = POPs;
a0d0e21e
LW
2295
2296 /* This egregious kludge implements goto &subroutine */
2297 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2298 I32 cxix;
c09156bb 2299 register PERL_CONTEXT *cx;
a0d0e21e
LW
2300 CV* cv = (CV*)SvRV(sv);
2301 SV** mark;
2302 I32 items = 0;
2303 I32 oldsave;
b1464ded 2304 bool reified = 0;
a0d0e21e 2305
e8f7dd13 2306 retry:
4aa0a1f7 2307 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2308 const GV * const gv = CvGV(cv);
e8f7dd13 2309 if (gv) {
7fc63493 2310 GV *autogv;
e8f7dd13
GS
2311 SV *tmpstr;
2312 /* autoloaded stub? */
2313 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2314 goto retry;
2315 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2316 GvNAMELEN(gv), FALSE);
2317 if (autogv && (cv = GvCV(autogv)))
2318 goto retry;
2319 tmpstr = sv_newmortal();
c445ea15 2320 gv_efullname3(tmpstr, gv, NULL);
95b63a38 2321 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",(void*)tmpstr);
4aa0a1f7 2322 }
cea2e8a9 2323 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2324 }
2325
a0d0e21e 2326 /* First do some returnish stuff. */
b37c2d43 2327 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2328 FREETMPS;
a0d0e21e
LW
2329 cxix = dopoptosub(cxstack_ix);
2330 if (cxix < 0)
cea2e8a9 2331 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2332 if (cxix < cxstack_ix)
2333 dounwind(cxix);
2334 TOPBLOCK(cx);
2d43a17f 2335 SPAGAIN;
564abe23 2336 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2337 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2338 if (CxREALEVAL(cx))
2339 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2340 else
2341 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2342 }
9850bf21
RH
2343 else if (CxMULTICALL(cx))
2344 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
d8b46c1b
GS
2345 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
2346 /* put @_ back onto stack */
a0d0e21e 2347 AV* av = cx->blk_sub.argarray;
bfed75c6 2348
93965878 2349 items = AvFILLp(av) + 1;
a45cdc79
DM
2350 EXTEND(SP, items+1); /* @_ could have been extended. */
2351 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2352 SvREFCNT_dec(GvAV(PL_defgv));
2353 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2354 CLEAR_ARGARRAY(av);
d8b46c1b 2355 /* abandon @_ if it got reified */
62b1ebc2 2356 if (AvREAL(av)) {
b1464ded
DM
2357 reified = 1;
2358 SvREFCNT_dec(av);
d8b46c1b
GS
2359 av = newAV();
2360 av_extend(av, items-1);
11ca45c0 2361 AvREIFY_only(av);
dd2155a4 2362 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2363 }
a0d0e21e 2364 }
aed2304a 2365 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2366 AV* const av = GvAV(PL_defgv);
1fa4e549 2367 items = AvFILLp(av) + 1;
a45cdc79
DM
2368 EXTEND(SP, items+1); /* @_ could have been extended. */
2369 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2370 }
a45cdc79
DM
2371 mark = SP;
2372 SP += items;
6b35e009 2373 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2374 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2375 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2376 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2377 LEAVE_SCOPE(oldsave);
2378
2379 /* Now do some callish stuff. */
2380 SAVETMPS;
5023d17a 2381 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2382 if (CvISXSUB(cv)) {
b37c2d43 2383 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2384 SV **newsp;
2385 I32 gimme;
b1464ded
DM
2386 if (reified) {
2387 I32 index;
2388 for (index=0; index<items; index++)
2389 sv_2mortal(SP[-index]);
2390 }
1fa4e549 2391
b37c2d43
AL
2392 /* XS subs don't have a CxSUB, so pop it */
2393 POPBLOCK(cx, PL_curpm);
2394 /* Push a mark for the start of arglist */
2395 PUSHMARK(mark);
2396 PUTBACK;
2397 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2398 LEAVE;
5eff7df7 2399 return retop;
a0d0e21e
LW
2400 }
2401 else {
b37c2d43 2402 AV* const padlist = CvPADLIST(cv);
6b35e009 2403 if (CxTYPE(cx) == CXt_EVAL) {
3280af22
NIS
2404 PL_in_eval = cx->blk_eval.old_in_eval;
2405 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22
RH
2406 cx->cx_type = CXt_SUB;
2407 cx->blk_sub.hasargs = 0;
2408 }
a0d0e21e 2409 cx->blk_sub.cv = cv;
1a5b3db4 2410 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2411
a0d0e21e
LW
2412 CvDEPTH(cv)++;
2413 if (CvDEPTH(cv) < 2)
74c765eb 2414 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2415 else {
599cee73 2416 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
44a8e56a 2417 sub_crush_depth(cv);
26019298 2418 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2419 }
fd617465
DM
2420 SAVECOMPPAD();
2421 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
6d4ff0d2 2422 if (cx->blk_sub.hasargs)
6d4ff0d2 2423 {
b37c2d43 2424 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2425
3280af22 2426 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2427 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2428 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2429 cx->blk_sub.argarray = av;
a0d0e21e
LW
2430
2431 if (items >= AvMAX(av) + 1) {
b37c2d43 2432 SV **ary = AvALLOC(av);
a0d0e21e
LW
2433 if (AvARRAY(av) != ary) {
2434 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
f880fe2f 2435 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2436 }
2437 if (items >= AvMAX(av) + 1) {
2438 AvMAX(av) = items - 1;
2439 Renew(ary,items+1,SV*);
2440 AvALLOC(av) = ary;
f880fe2f 2441 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2442 }
2443 }
a45cdc79 2444 ++mark;
a0d0e21e 2445 Copy(mark,AvARRAY(av),items,SV*);
93965878 2446 AvFILLp(av) = items - 1;
d8b46c1b 2447 assert(!AvREAL(av));
b1464ded
DM
2448 if (reified) {
2449 /* transfer 'ownership' of refcnts to new @_ */
2450 AvREAL_on(av);
2451 AvREIFY_off(av);
2452 }
a0d0e21e
LW
2453 while (items--) {
2454 if (*mark)
2455 SvTEMP_off(*mark);
2456 mark++;
2457 }
2458 }
491527d0 2459 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
44a8e56a
PP
2460 /*
2461 * We do not care about using sv to call CV;
2462 * it's for informational purposes only.
2463 */
890ce7af 2464 SV * const sv = GvSV(PL_DBsub);
f398eb67 2465 save_item(sv);
491527d0 2466 if (PERLDB_SUB_NN) {
890ce7af 2467 const int type = SvTYPE(sv);
f398eb67
NC
2468 if (type < SVt_PVIV && type != SVt_IV)
2469 sv_upgrade(sv, SVt_PVIV);
7619c85e 2470 (void)SvIOK_on(sv);
45977657 2471 SvIV_set(sv, PTR2IV(cv)); /* Do it the quickest way */
491527d0 2472 } else {
c445ea15 2473 gv_efullname3(sv, CvGV(cv), NULL);
491527d0 2474 }
b37c2d43
AL
2475 if (PERLDB_GOTO) {
2476 CV * const gotocv = get_cv("DB::goto", FALSE);
2477 if (gotocv) {
2478 PUSHMARK( PL_stack_sp );
2479 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2480 PL_stack_sp--;
2481 }
491527d0 2482 }
1ce6579f 2483 }
a0d0e21e
LW
2484 RETURNOP(CvSTART(cv));
2485 }
2486 }
1614b0e3 2487 else {
0510663f 2488 label = SvPV_nolen_const(sv);
1614b0e3 2489 if (!(do_dump || *label))
cea2e8a9 2490 DIE(aTHX_ must_have_label);
1614b0e3 2491 }
a0d0e21e 2492 }
533c011a 2493 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2494 if (! do_dump)
cea2e8a9 2495 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2496 }
2497 else
2498 label = cPVOP->op_pv;
2499
2500 if (label && *label) {
cbbf8932 2501 OP *gotoprobe = NULL;
3b2447bc 2502 bool leaving_eval = FALSE;
33d34e4c 2503 bool in_block = FALSE;
cbbf8932 2504 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2505
2506 /* find label */
2507
d4c19fe8 2508 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2509 *enterops = 0;
2510 for (ix = cxstack_ix; ix >= 0; ix--) {
2511 cx = &cxstack[ix];
6b35e009 2512 switch (CxTYPE(cx)) {
a0d0e21e 2513 case CXt_EVAL:
3b2447bc 2514 leaving_eval = TRUE;
971ecbe6 2515 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2516 gotoprobe = (last_eval_cx ?
2517 last_eval_cx->blk_eval.old_eval_root :
2518 PL_eval_root);
2519 last_eval_cx = cx;
9c5794fe
RH
2520 break;
2521 }
2522 /* else fall through */
a0d0e21e
LW
2523 case CXt_LOOP:
2524 gotoprobe = cx->blk_oldcop->op_sibling;
2525 break;
2526 case CXt_SUBST:
2527 continue;
2528 case CXt_BLOCK:
33d34e4c 2529 if (ix) {
a0d0e21e 2530 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2531 in_block = TRUE;
2532 } else
3280af22 2533 gotoprobe = PL_main_root;
a0d0e21e 2534 break;
b3933176 2535 case CXt_SUB:
9850bf21 2536 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2537 gotoprobe = CvROOT(cx->blk_sub.cv);
2538 break;
2539 }
2540 /* FALL THROUGH */
7766f137 2541 case CXt_FORMAT:
0a753a76 2542 case CXt_NULL:
a651a37d 2543 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2544 default:
2545 if (ix)
cea2e8a9 2546 DIE(aTHX_ "panic: goto");
3280af22 2547 gotoprobe = PL_main_root;
a0d0e21e
LW
2548 break;
2549 }
2b597662
GS
2550 if (gotoprobe) {
2551 retop = dofindlabel(gotoprobe, label,
2552 enterops, enterops + GOTO_DEPTH);
2553 if (retop)
2554 break;
2555 }
3280af22 2556 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2557 }
2558 if (!retop)
cea2e8a9 2559 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2560
3b2447bc
RH
2561 /* if we're leaving an eval, check before we pop any frames
2562 that we're not going to punt, otherwise the error
2563 won't be caught */
2564
2565 if (leaving_eval && *enterops && enterops[1]) {
2566 I32 i;
2567 for (i = 1; enterops[i]; i++)
2568 if (enterops[i]->op_type == OP_ENTERITER)
2569 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2570 }
2571
a0d0e21e
LW
2572 /* pop unwanted frames */
2573
2574 if (ix < cxstack_ix) {
2575 I32 oldsave;
2576
2577 if (ix < 0)
2578 ix = 0;
2579 dounwind(ix);
2580 TOPBLOCK(cx);
3280af22 2581 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2582 LEAVE_SCOPE(oldsave);
2583 }
2584
2585 /* push wanted frames */
2586
748a9306 2587 if (*enterops && enterops[1]) {
0bd48802 2588 OP * const oldop = PL_op;
33d34e4c
AE
2589 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2590 for (; enterops[ix]; ix++) {
533c011a 2591 PL_op = enterops[ix];
84902520
TB
2592 /* Eventually we may want to stack the needed arguments
2593 * for each op. For now, we punt on the hard ones. */
533c011a 2594 if (PL_op->op_type == OP_ENTERITER)
894356b3 2595 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2596 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2597 }
533c011a 2598 PL_op = oldop;
a0d0e21e
LW
2599 }
2600 }
2601
2602 if (do_dump) {
a5f75d66 2603#ifdef VMS
6b88bc9c 2604 if (!retop) retop = PL_main_start;
a5f75d66 2605#endif
3280af22
NIS
2606 PL_restartop = retop;
2607 PL_do_undump = TRUE;
a0d0e21e
LW
2608
2609 my_unexec();
2610
3280af22
NIS
2611 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2612 PL_do_undump = FALSE;
a0d0e21e
LW
2613 }
2614
2615 RETURNOP(retop);
2616}
2617
2618PP(pp_exit)
2619{
97aff369 2620 dVAR;
39644a26 2621 dSP;
a0d0e21e
LW
2622 I32 anum;
2623
2624 if (MAXARG < 1)
2625 anum = 0;
ff0cee69 2626 else {
a0d0e21e 2627 anum = SvIVx(POPs);
d98f61e7
GS
2628#ifdef VMS
2629 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2630 anum = 0;
96e176bf 2631 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2632#endif
2633 }
cc3604b1 2634 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2635#ifdef PERL_MAD
2636 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2637 if (anum || !(PL_minus_c && PL_madskills))
2638 my_exit(anum);
2639#else
a0d0e21e 2640 my_exit(anum);
81d86705 2641#endif
3280af22 2642 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2643 RETURN;
2644}
2645
a0d0e21e
LW
2646/* Eval. */
2647
0824fdcb 2648STATIC void
cea2e8a9 2649S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2650{
504618e9 2651 const char *s = SvPVX_const(sv);
890ce7af 2652 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2653 I32 line = 1;
a0d0e21e
LW
2654
2655 while (s && s < send) {
f54cb97a 2656 const char *t;
561b68a9 2657 SV * const tmpstr = newSV(0);
a0d0e21e
LW
2658
2659 sv_upgrade(tmpstr, SVt_PVMG);
2660 t = strchr(s, '\n');
2661 if (t)
2662 t++;
2663 else
2664 t = send;
2665
2666 sv_setpvn(tmpstr, s, t - s);
2667 av_store(array, line++, tmpstr);
2668 s = t;
2669 }
2670}
2671
901017d6 2672STATIC void
14dd3ad8
GS
2673S_docatch_body(pTHX)
2674{
97aff369 2675 dVAR;
cea2e8a9 2676 CALLRUNOPS(aTHX);
901017d6 2677 return;
312caa8e
CS
2678}
2679
0824fdcb 2680STATIC OP *
cea2e8a9 2681S_docatch(pTHX_ OP *o)
1e422769 2682{
97aff369 2683 dVAR;
6224f72b 2684 int ret;
06b5626a 2685 OP * const oldop = PL_op;
db36c5a1 2686 dJMPENV;
1e422769 2687
1e422769 2688#ifdef DEBUGGING
54310121 2689 assert(CATCH_GET == TRUE);
1e422769 2690#endif
312caa8e 2691 PL_op = o;
8bffa5f8 2692
14dd3ad8 2693 JMPENV_PUSH(ret);
6224f72b 2694 switch (ret) {
312caa8e 2695 case 0:
abd70938
DM
2696 assert(cxstack_ix >= 0);
2697 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2698 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8
GS
2699 redo_body:
2700 docatch_body();
312caa8e
CS
2701 break;
2702 case 3:
8bffa5f8 2703 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2704
2705 /* NB XXX we rely on the old popped CxEVAL still being at the top
2706 * of the stack; the way die_where() currently works, this
2707 * assumption is valid. In theory The cur_top_env value should be
2708 * returned in another global, the way retop (aka PL_restartop)
2709 * is. */
2710 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2711
2712 if (PL_restartop
2713 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2714 {
312caa8e
CS
2715 PL_op = PL_restartop;
2716 PL_restartop = 0;
2717 goto redo_body;
2718 }
2719 /* FALL THROUGH */
2720 default:
14dd3ad8 2721 JMPENV_POP;
533c011a 2722 PL_op = oldop;
6224f72b 2723 JMPENV_JUMP(ret);
1e422769 2724 /* NOTREACHED */
1e422769 2725 }
14dd3ad8 2726 JMPENV_POP;
533c011a 2727 PL_op = oldop;
5f66b61c 2728 return NULL;
1e422769
PP
2729}
2730
c277df42 2731OP *
bfed75c6 2732Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2733/* sv Text to convert to OP tree. */
2734/* startop op_free() this to undo. */
2735/* code Short string id of the caller. */
2736{
f7997f86 2737 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2738 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2739 PERL_CONTEXT *cx;
2740 SV **newsp;
b094c71d 2741 I32 gimme = G_VOID;
c277df42
IZ
2742 I32 optype;
2743 OP dummy;
155aba94 2744 OP *rop;
83ee9e09
GS
2745 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2746 char *tmpbuf = tbuf;
c277df42 2747 char *safestr;
a3985cdc 2748 int runtime;
601f1833 2749 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2750 STRLEN len;
c277df42
IZ
2751
2752 ENTER;
2753 lex_start(sv);
2754 SAVETMPS;
2755 /* switch to eval mode */
2756
923e4eb5 2757 if (IN_PERL_COMPILETIME) {
f4dd75d9 2758 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2759 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2760 }
83ee9e09 2761 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2762 SV * const sv = sv_newmortal();
83ee9e09
GS
2763 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2764 code, (unsigned long)++PL_evalseq,
2765 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2766 tmpbuf = SvPVX(sv);
fc009855 2767 len = SvCUR(sv);
83ee9e09
GS
2768 }
2769 else
d9fad198
JH
2770 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2771 (unsigned long)++PL_evalseq);
f4dd75d9 2772 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2773 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2774 SAVECOPLINE(&PL_compiling);
57843af0 2775 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2776 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2777 deleting the eval's FILEGV from the stash before gv_check() runs
2778 (i.e. before run-time proper). To work around the coredump that
2779 ensues, we always turn GvMULTI_on for any globals that were
2780 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2781 safestr = savepvn(tmpbuf, len);
2782 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2783 SAVEHINTS();
d1ca3daa 2784#ifdef OP_IN_REGISTER
6b88bc9c 2785 PL_opsave = op;
d1ca3daa 2786#else
7766f137 2787 SAVEVPTR(PL_op);
d1ca3daa 2788#endif
c277df42 2789
a3985cdc 2790 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2791 runtime = IN_PERL_RUNTIME;
a3985cdc 2792 if (runtime)
d819b83a 2793 runcv = find_runcv(NULL);
a3985cdc 2794
533c011a 2795 PL_op = &dummy;
13b51b79 2796 PL_op->op_type = OP_ENTEREVAL;
533c011a 2797 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2798 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
a0714e2c 2799 PUSHEVAL(cx, 0, NULL);
a3985cdc
DM
2800
2801 if (runtime)
2802 rop = doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
2803 else
2804 rop = doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2805 POPBLOCK(cx,PL_curpm);
e84b9f1f 2806 POPEVAL(cx);
c277df42
IZ
2807
2808 (*startop)->op_type = OP_NULL;
22c35a8c 2809 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2810 lex_end();
f3548bdc 2811 /* XXX DAPM do this properly one year */
b37c2d43 2812 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2813 LEAVE;
923e4eb5 2814 if (IN_PERL_COMPILETIME)
623e6609 2815 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2816#ifdef OP_IN_REGISTER
6b88bc9c 2817 op = PL_opsave;
d1ca3daa 2818#endif
9d4ba2ae
AL
2819 PERL_UNUSED_VAR(newsp);
2820 PERL_UNUSED_VAR(optype);
2821
c277df42
IZ
2822 return rop;
2823}
2824
a3985cdc
DM
2825
2826/*
2827=for apidoc find_runcv
2828
2829Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2830If db_seqp is non_null, skip CVs that are in the DB package and populate
2831*db_seqp with the cop sequence number at the point that the DB:: code was
2832entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2833than in the scope of the debugger itself).
a3985cdc
DM
2834
2835=cut
2836*/
2837
2838CV*
d819b83a 2839Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2840{
97aff369 2841 dVAR;
a3985cdc 2842 PERL_SI *si;
a3985cdc 2843
d819b83a
DM
2844 if (db_seqp)
2845 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2846 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2847 I32 ix;
a3985cdc 2848 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2849 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2850 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2851 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2852 /* skip DB:: code */
2853 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2854 *db_seqp = cx->blk_oldcop->cop_seq;
2855 continue;
2856 }
2857 return cv;
2858 }
a3985cdc
DM
2859 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2860 return PL_compcv;
2861 }
2862 }
2863 return PL_main_cv;
2864}
2865
2866
2867/* Compile a require/do, an eval '', or a /(?{...})/.
2868 * In the last case, startop is non-null, and contains the address of
2869 * a pointer that should be set to the just-compiled code.
2870 * outside is the lexically enclosing CV (if any) that invoked us.
2871 */
2872
4d1ff10f 2873/* With USE_5005THREADS, eval_owner must be held on entry to doeval */
0824fdcb 2874STATIC OP *
a3985cdc 2875S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2876{
27da23d5 2877 dVAR; dSP;
46c461b5 2878 OP * const saveop = PL_op;
a0d0e21e 2879
6dc8a9e4
IZ
2880 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2881 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2882 : EVAL_INEVAL);
a0d0e21e 2883
1ce6579f
PP
2884 PUSHMARK(SP);
2885
3280af22 2886 SAVESPTR(PL_compcv);
561b68a9 2887 PL_compcv = (CV*)newSV(0);
3280af22 2888 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1aff0e91 2889 CvEVAL_on(PL_compcv);
2090ab20
JH
2890 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2891 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2892
a3985cdc 2893 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2894 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2895
dd2155a4 2896 /* set up a scratch pad */
a0d0e21e 2897
dd2155a4 2898 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2899 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2900
07055b4c 2901
81d86705
NC
2902 if (!PL_madskills)
2903 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2904
a0d0e21e
LW
2905 /* make sure we compile in the right package */
2906
ed094faf 2907 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2908 SAVESPTR(PL_curstash);
ed094faf 2909 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2910 }
3280af22
NIS
2911 SAVESPTR(PL_beginav);
2912 PL_beginav = newAV();
2913 SAVEFREESV(PL_beginav);
24944567 2914 SAVEI32(PL_error_count);
a0d0e21e 2915
81d86705
NC
2916#ifdef PERL_MAD
2917 SAVEI32(PL_madskills);
2918 PL_madskills = 0;
2919#endif
2920
a0d0e21e
LW
2921 /* try to compile it */
2922
5f66b61c 2923 PL_eval_root = NULL;
3280af22
NIS
2924 PL_error_count = 0;
2925 PL_curcop = &PL_compiling;
fc15ae8f 2926 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2927 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2928 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2929 else
c69006e4 2930 sv_setpvn(ERRSV,"",0);
3280af22 2931 if (yyparse() || PL_error_count || !PL_eval_root) {
0c58d367 2932 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2933 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2934 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2935 const char *msg;
bfed75c6 2936
533c011a 2937 PL_op = saveop;
3280af22
NIS
2938 if (PL_eval_root) {
2939 op_free(PL_eval_root);
5f66b61c 2940 PL_eval_root = NULL;
a0d0e21e 2941 }
3280af22 2942 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2943 if (!startop) {
3280af22 2944 POPBLOCK(cx,PL_curpm);
c277df42 2945 POPEVAL(cx);
c277df42 2946 }
a0d0e21e
LW
2947 lex_end();
2948 LEAVE;
9d4ba2ae
AL
2949
2950 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 2951 if (optype == OP_REQUIRE) {
b464bac0 2952 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 2953 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 2954 &PL_sv_undef, 0);
5a844595
GS
2955 DIE(aTHX_ "%sCompilation failed in require",
2956 *msg ? msg : "Unknown error\n");
2957 }
2958 else if (startop) {
3280af22 2959 POPBLOCK(cx,PL_curpm);
c277df42 2960 POPEVAL(cx);
5a844595
GS
2961 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2962 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 2963 }
9d7f88dd 2964 else {
9d7f88dd
SR
2965 if (!*msg) {
2966 sv_setpv(ERRSV, "Compilation error");
2967 }
2968 }
9d4ba2ae 2969 PERL_UNUSED_VAR(newsp);
a0d0e21e
LW
2970 RETPUSHUNDEF;
2971 }
57843af0 2972 CopLINE_set(&PL_compiling, 0);
c277df42 2973 if (startop) {
3280af22 2974 *startop = PL_eval_root;
c277df42 2975 } else
3280af22 2976 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
2977
2978 /* Set the context for this new optree.
2979 * If the last op is an OP_REQUIRE, force scalar context.
2980 * Otherwise, propagate the context from the eval(). */
2981 if (PL_eval_root->op_type == OP_LEAVEEVAL
2982 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
2983 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
2984 == OP_REQUIRE)
2985 scalar(PL_eval_root);
2986 else if (gimme & G_VOID)
3280af22 2987 scalarvoid(PL_eval_root);
54310121 2988 else if (gimme & G_ARRAY)
3280af22 2989 list(PL_eval_root);
a0d0e21e 2990 else
3280af22 2991 scalar(PL_eval_root);
a0d0e21e
LW
2992
2993 DEBUG_x(dump_eval());
2994
55497cff 2995 /* Register with debugger: */
6482a30d 2996 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 2997 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP
2998 if (cv) {
2999 dSP;
924508f0 3000 PUSHMARK(SP);
cc49e20b 3001 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 3002 PUTBACK;
864dbfa3 3003 call_sv((SV*)cv, G_DISCARD);
55497cff
PP
3004 }
3005 }
3006
a0d0e21e
LW
3007 /* compiled okay, so do it */
3008
3280af22
NIS
3009 CvDEPTH(PL_compcv) = 1;
3010 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3011 PL_op = saveop; /* The caller may need it. */
6dc8a9e4 3012 PL_lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3013
3280af22 3014 RETURNOP(PL_eval_start);
a0d0e21e
LW
3015}
3016
a6c40364 3017STATIC PerlIO *
74d5ed12 3018S_check_type_and_open(pTHX_ const char *name, const char *mode)
ce8abf5f
SP
3019{
3020 Stat_t st;
c445ea15 3021 const int st_rc = PerlLIO_stat(name, &st);
df528165 3022
6b845e56 3023 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3024 return NULL;
ce8abf5f
SP
3025 }
3026
ce8abf5f
SP
3027 return PerlIO_open(name, mode);
3028}
3029
3030STATIC PerlIO *
7925835c 3031S_doopen_pm(pTHX_ const char *name, const char *mode)
b295d113 3032{
7925835c 3033#ifndef PERL_DISABLE_PMC
f54cb97a 3034 const STRLEN namelen = strlen(name);
b295d113
TH
3035 PerlIO *fp;
3036
7894fbab 3037 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
9d4ba2ae 3038 SV * const pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
349d4f2f 3039 const char * const pmc = SvPV_nolen_const(pmcsv);
a6c40364
GS
3040 Stat_t pmcstat;
3041 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
85e8f315 3042 fp = check_type_and_open(name, mode);
a6c40364
GS
3043 }
3044 else {
a91233bf 3045 fp = check_type_and_open(pmc, mode);
b295d113 3046 }
a6c40364
GS
3047 SvREFCNT_dec(pmcsv);
3048 }
3049 else {
85e8f315 3050 fp = check_type_and_open(name, mode);
b295d113 3051 }
b295d113 3052 return fp;
7925835c 3053#else
85e8f315 3054 return check_type_and_open(name, mode);
7925835c 3055#endif /* !PERL_DISABLE_PMC */
b295d113
TH
3056}
3057
a0d0e21e
LW
3058PP(pp_require)
3059{
27da23d5 3060 dVAR; dSP;
c09156bb 3061 register PERL_CONTEXT *cx;
a0d0e21e 3062 SV *sv;
5c144d81 3063 const char *name;
6132ea6c 3064 STRLEN len;
c445ea15
AL
3065 const char *tryname = NULL;
3066 SV *namesv = NULL;
f54cb97a 3067 const I32 gimme = GIMME_V;
bbed91b5 3068 int filter_has_file = 0;
c445ea15 3069 PerlIO *tryrsfp = NULL;
34113e50 3070 SV *filter_cache = NULL;
c445ea15
AL
3071 SV *filter_state = NULL;
3072 SV *filter_sub = NULL;
3073 SV *hook_sv = NULL;
6ec9efec
JH
3074 SV *encoding;
3075 OP *op;
a0d0e21e
LW
3076
3077 sv = POPs;
d7aa5382
JP
3078 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
3079 if ( SvVOK(sv) && ckWARN(WARN_PORTABLE) ) /* require v5.6.1 */
9014280d 3080 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
e3407aba 3081 "v-string in use/require non-portable");
d7aa5382
JP
3082
3083 sv = new_version(sv);
3084 if (!sv_derived_from(PL_patchlevel, "version"))
2593c6c6 3085 upg_version(PL_patchlevel);
149c1637 3086 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3087 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3088 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
95b63a38 3089 (void*)vnormal(sv), (void*)vnormal(PL_patchlevel));
468aa647
RGS
3090 }
3091 else {
3092 if ( vcmp(sv,PL_patchlevel) > 0 )
3093 DIE(aTHX_ "Perl %"SVf" required--this is only %"SVf", stopped",
95b63a38 3094 (void*)vnormal(sv), (void*)vnormal(PL_patchlevel));
468aa647 3095 }
d7aa5382 3096
4305d8ab 3097 RETPUSHYES;
a0d0e21e 3098 }
5c144d81 3099 name = SvPV_const(sv, len);
6132ea6c 3100 if (!(name && len > 0 && *name))
cea2e8a9 3101 DIE(aTHX_ "Null filename used");
4633a7c4 3102 TAINT_PROPER("require");
44f8325f 3103 if (PL_op->op_type == OP_REQUIRE) {
0bd48802 3104 SV * const * const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
44f8325f
AL
3105 if ( svp ) {
3106 if (*svp != &PL_sv_undef)
3107 RETPUSHYES;
3108 else
3109 DIE(aTHX_ "Compilation failed in require");
3110 }
4d8b06f1 3111 }
a0d0e21e
LW
3112
3113 /* prepare to compile file */
3114
be4b629d 3115 if (path_is_absolute(name)) {
46fc3d4c 3116 tryname = name;
7925835c 3117 tryrsfp = doopen_pm(name,PERL_SCRIPT_MODE);
bf4acbe4 3118 }
67627c52
JH
3119#ifdef MACOS_TRADITIONAL
3120 if (!tryrsfp) {
3121 char newname[256];
3122
3123 MacPerl_CanonDir(name, newname, 1);
3124 if (path_is_absolute(newname)) {
3125 tryname = newname;
7925835c 3126 tryrsfp = doopen_pm(newname,PERL_SCRIPT_MODE);
67627c52
JH
3127 }
3128 }
3129#endif
be4b629d 3130 if (!tryrsfp) {
44f8325f 3131 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3132 I32 i;
748a9306 3133#ifdef VMS
46fc3d4c 3134 char *unixname;
c445ea15 3135 if ((unixname = tounixspec(name, NULL)) != NULL)
46fc3d4c
PP
3136#endif
3137 {
561b68a9 3138 namesv = newSV(0);
46fc3d4c 3139 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3140 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5
KF
3141
3142 if (SvROK(dirsv)) {
3143 int count;
3144 SV *loader = dirsv;
3145
e14e2dc8
NC
3146 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3147 && !sv_isobject(loader))
3148 {
bbed91b5
KF
3149 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3150 }
3151
b900a521 3152 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3153 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3154 tryname = SvPVX_const(namesv);
c445ea15 3155 tryrsfp = NULL;
bbed91b5
KF
3156
3157 ENTER;
3158 SAVETMPS;
3159 EXTEND(SP, 2);
3160
3161 PUSHMARK(SP);
3162 PUSHs(dirsv);
3163 PUSHs(sv);
3164 PUTBACK;
e982885c
NC
3165 if (sv_isobject(loader))
3166 count = call_method("INC", G_ARRAY);
3167 else
3168 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3169 SPAGAIN;
3170
3171 if (count > 0) {
3172 int i = 0;
3173 SV *arg;
3174
3175 SP -= count - 1;
3176 arg = SP[i++];
3177
34113e50
NC
3178 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3179 && !isGV_with_GP(SvRV(arg))) {
3180 filter_cache = SvRV(arg);
74c765eb 3181 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC
3182
3183 if (i < count) {
3184 arg = SP[i++];
3185 }
3186 }
3187
bbed91b5
KF
3188 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3189 arg = SvRV(arg);
3190 }
3191
3192 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3193 IO * const io = GvIO((GV *)arg);
bbed91b5
KF
3194
3195 ++filter_has_file;
3196
3197 if (io) {
3198 tryrsfp = IoIFP(io);
0f7de14d
NC
3199 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3200 PerlIO_close(IoOFP(io));
bbed91b5 3201 }
0f7de14d
NC
3202 IoIFP(io) = NULL;
3203 IoOFP(io) = NULL;
bbed91b5
KF
3204 }
3205
3206 if (i < count) {
3207 arg = SP[i++];
3208 }
3209 }
3210
3211 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3212 filter_sub = arg;
74c765eb 3213 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF
3214
3215 if (i < count) {
3216 filter_state = SP[i];
b37c2d43 3217 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3218 }
34113e50 3219 }
bbed91b5 3220
34113e50
NC
3221 if (!tryrsfp && (filter_cache || filter_sub)) {
3222 tryrsfp = PerlIO_open(BIT_BUCKET,
3223 PERL_SCRIPT_MODE);
bbed91b5 3224 }
1d06aecd 3225 SP--;
bbed91b5
KF
3226 }
3227
3228 PUTBACK;
3229 FREETMPS;
3230 LEAVE;
3231
3232 if (tryrsfp) {
89ccab8c 3233 hook_sv = dirsv;
bbed91b5
KF
3234 break;
3235 }
3236
3237 filter_has_file = 0;
34113e50
NC
3238 if (filter_cache) {
3239 SvREFCNT_dec(filter_cache);
3240 filter_cache = NULL;
3241 }
bbed91b5
KF
3242 if (filter_state) {
3243 SvREFCNT_dec(filter_state);
c445ea15 3244 filter_state = NULL;
bbed91b5
KF
3245 }
3246 if (filter_sub) {
3247 SvREFCNT_dec(filter_sub);
c445ea15 3248 filter_sub = NULL;
bbed91b5
KF
3249 }
3250 }
3251 else {
be4b629d
CN
3252 if (!path_is_absolute(name)
3253#ifdef MACOS_TRADITIONAL
3254 /* We consider paths of the form :a:b ambiguous and interpret them first
3255 as global then as local
3256 */
3257 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3258#endif
3259 ) {
0510663f 3260 const char *dir = SvPVx_nolen_const(dirsv);
bf4acbe4 3261#ifdef MACOS_TRADITIONAL
67627c52
JH
3262 char buf1[256];
3263 char buf2[256];
3264
3265 MacPerl_CanonDir(name, buf2, 1);
3266 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3267#else
27da23d5 3268# ifdef VMS
bbed91b5 3269 char *unixdir;
c445ea15 3270 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF
3271 continue;
3272 sv_setpv(namesv, unixdir);
3273 sv_catpv(namesv, unixname);
27da23d5 3274# else
a0fd4948 3275# ifdef __SYMBIAN32__
27da23d5
JH
3276 if (PL_origfilename[0] &&
3277 PL_origfilename[1] == ':' &&
3278 !(dir[0] && dir[1] == ':'))
3279 Perl_sv_setpvf(aTHX_ namesv,
3280 "%c:%s\\%s",
3281 PL_origfilename[0],
3282 dir, name);
3283 else
3284 Perl_sv_setpvf(aTHX_ namesv,
3285 "%s\\%s",
3286 dir, name);
3287# else
bbed91b5 3288 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
27da23d5
JH
3289# endif
3290# endif
bf4acbe4 3291#endif
bbed91b5 3292 TAINT_PROPER("require");
349d4f2f 3293 tryname = SvPVX_const(namesv);
7925835c 3294 tryrsfp = doopen_pm(tryname, PERL_SCRIPT_MODE);
bbed91b5
KF
3295 if (tryrsfp) {
3296 if (tryname[0] == '.' && tryname[1] == '/')
3297 tryname += 2;
3298 break;
3299 }
ff806af2
DM
3300 else if (errno == EMFILE)
3301 /* no point in trying other paths if out of handles */
3302 break;
be4b629d 3303 }
46fc3d4c 3304 }
a0d0e21e
LW
3305 }
3306 }
3307 }
f4dd75d9 3308 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3309 CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
46fc3d4c 3310 SvREFCNT_dec(namesv);
a0d0e21e 3311 if (!tryrsfp) {
533c011a 3312 if (PL_op->op_type == OP_REQUIRE) {
5c144d81 3313 const char *msgstr = name;
e31de809 3314 if(errno == EMFILE) {
b9b739dc
NC
3315 SV * const msg
3316 = sv_2mortal(Perl_newSVpvf(aTHX_ "%s: %s", msgstr,
3317 Strerror(errno)));
349d4f2f 3318 msgstr = SvPV_nolen_const(msg);
e31de809
SP
3319 } else {
3320 if (namesv) { /* did we lookup @INC? */
44f8325f 3321 AV * const ar = GvAVn(PL_incgv);
e31de809 3322 I32 i;
b8f04b1b
NC
3323 SV * const msg = sv_2mortal(Perl_newSVpvf(aTHX_
3324 "%s in @INC%s%s (@INC contains:",
3325 msgstr,
3326 (instr(msgstr, ".h ")
3327 ? " (change .h to .ph maybe?)" : ""),
3328 (instr(msgstr, ".ph ")
3329 ? " (did you run h2ph?)" : "")
3330 ));
3331
e31de809 3332 for (i = 0; i <= AvFILL(ar); i++) {
396482e1 3333 sv_catpvs(msg, " ");
b8f04b1b 3334 sv_catsv(msg, *av_fetch(ar, i, TRUE));
e31de809 3335 }
396482e1 3336 sv_catpvs(msg, ")");
e31de809
SP
3337 msgstr = SvPV_nolen_const(msg);
3338 }
2683423c 3339 }
ea071790 3340 DIE(aTHX_ "Can't locate %s", msgstr);
a0d0e21e
LW
3341 }
3342
3343 RETPUSHUNDEF;
3344 }
d8bfb8bd 3345 else
93189314 3346 SETERRNO(0, SS_NORMAL);
a0d0e21e
LW
3347
3348 /* Assume success here to prevent recursive requirement. */
238d24b4 3349 /* name is never assigned to again, so len is still strlen(name) */
d3a4e64e 3350 /* Check whether a hook in @INC has already filled %INC */
44f8325f
AL
3351 if (!hook_sv) {
3352 (void)hv_store(GvHVn(PL_incgv), name, len, newSVpv(CopFILE(&PL_compiling),0),0);
3353 } else {
3354 SV** const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3355 if (!svp)
b37c2d43 3356 (void)hv_store(GvHVn(PL_incgv), name, len, SvREFCNT_inc_simple(hook_sv), 0 );
d3a4e64e 3357 }
a0d0e21e
LW
3358
3359 ENTER;
3360 SAVETMPS;
396482e1 3361 lex_start(sv_2mortal(newSVpvs("")));
b9d12d37 3362 SAVEGENERICSV(PL_rsfp_filters);
7d49f689 3363 PL_rsfp_filters = NULL;
e50aee73 3364
3280af22 3365 PL_rsfp = tryrsfp;
b3ac6de7 3366 SAVEHINTS();
3280af22 3367 PL_hints = 0;
68da3b2f 3368 SAVECOMPILEWARNINGS();
0453d815 3369 if (PL_dowarn & G_WARN_ALL_ON)
d3a7d8c7 3370 PL_compiling.cop_warnings = pWARN_ALL ;
0453d815 3371 else if (PL_dowarn & G_WARN_ALL_OFF)
d3a7d8c7 3372 PL_compiling.cop_warnings = pWARN_NONE ;
72dc9ed5
NC
3373 else if (PL_taint_warn) {
3374 PL_compiling.cop_warnings
8ee4cf24 3375 = Perl_new_warnings_bitfield(aTHX_ NULL, WARN_TAINTstring, WARNsize);
72dc9ed5 3376 }
ac27b0f5 3377 else
d3a7d8c7 3378 PL_compiling.cop_warnings = pWARN_STD ;
a0d0e21e 3379
34113e50 3380 if (filter_sub || filter_cache) {
c445ea15 3381 SV * const datasv = filter_add(S_run_user_filter, NULL);
bbed91b5 3382 IoLINES(datasv) = filter_has_file;
bbed91b5
KF
3383 IoTOP_GV(datasv) = (GV *)filter_state;
3384 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
34113e50 3385 IoFMT_GV(datasv) = (GV *)filter_cache;
bbed91b5
KF
3386 }
3387
3388 /* switch to eval mode */
a0d0e21e 3389 PUSHBLOCK(cx, CXt_EVAL, SP);
a0714e2c 3390 PUSHEVAL(cx, name, NULL);
f39bc417 3391 cx->blk_eval.retop = PL_op->op_next;
a0d0e21e 3392
57843af0
GS
3393 SAVECOPLINE(&PL_compiling);
3394 CopLINE_set(&PL_compiling, 0);
a0d0e21e
LW
3395
3396 PUTBACK;
6ec9efec
JH
3397
3398 /* Store and reset encoding. */
3399 encoding = PL_encoding;
c445ea15 3400 PL_encoding = NULL;
6ec9efec 3401
601f1833 3402 op = DOCATCH(doeval(gimme, NULL, NULL, PL_curcop->cop_seq));
bfed75c6 3403
6ec9efec
JH
3404 /* Restore encoding. */
3405 PL_encoding = encoding;
3406
3407 return op;
a0d0e21e
LW
3408}
3409
a0d0e21e
LW
3410PP(pp_entereval)
3411{
27da23d5 3412 dVAR; dSP;
c09156bb 3413 register PERL_CONTEXT *cx;
0d863452 3414 SV *sv;
890ce7af
AL