This is a live mirror of the Perl 5 development currently hosted at https://github.com/perl/perl5
Augment the user filter caching code so that if the user filter returns
[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)) {
227a8b4b 116 SV *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);
c277df42 128
20408e3c 129 /* Check against the last compiled regexp. */
aaa362c4 130 if (!PM_GETRE(pm) || !PM_GETRE(pm)->precomp ||
eb160463 131 PM_GETRE(pm)->prelen != (I32)len ||
aaa362c4 132 memNE(PM_GETRE(pm)->precomp, t, len))
85aff577 133 {
aaa362c4 134 if (PM_GETRE(pm)) {
d8f2cf8a 135 ReREFCNT_dec(PM_GETRE(pm));
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);
d8f2cf8a 200 PM_SETRE(pm,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);
748a9306 248 sv_free(dstr);
48c036b1
GS
249
250 TAINT_IF(cx->sb_rxtainted & 1);
22e13caa 251 PUSHs(sv_2mortal(newSViv(saviters - 1)));
48c036b1 252
ffc61ed2 253 (void)SvPOK_only_UTF8(targ);
48c036b1 254 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 255 SvSETMAGIC(targ);
9212bbba 256 SvTAINT(targ);
5cd24f17 257
4633a7c4 258 LEAVE_SCOPE(cx->sb_oldsave);
d8f2cf8a 259 ReREFCNT_dec(rx);
a0d0e21e
LW
260 POPSUBST(cx);
261 RETURNOP(pm->op_next);
262 }
8e5e9ebe 263 cx->sb_iters = saviters;
a0d0e21e 264 }
cf93c79d 265 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW
266 m = s;
267 s = orig;
cf93c79d 268 cx->sb_orig = orig = rx->subbeg;
a0d0e21e
LW
269 s = orig + (m - s);
270 cx->sb_strend = s + (cx->sb_strend - m);
271 }
cf93c79d 272 cx->sb_m = m = rx->startp[0] + orig;
db79b45b 273 if (m > s) {
bfed75c6 274 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH
275 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
276 else
277 sv_catpvn(dstr, s, m-s);
278 }
cf93c79d 279 cx->sb_s = rx->endp[0] + orig;
084916e3 280 { /* Update the pos() information. */
44f8325f 281 SV * const sv = cx->sb_targ;
084916e3
JH
282 MAGIC *mg;
283 I32 i;
284 if (SvTYPE(sv) < SVt_PVMG)
862a34c6 285 SvUPGRADE(sv, SVt_PVMG);
14befaf4 286 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82
NC
287#ifdef PERL_OLD_COPY_ON_WRITE
288 if (SvIsCOW(lsv))
289 sv_force_normal_flags(sv, 0);
290#endif
291 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
292 NULL, 0);
084916e3
JH
293 }
294 i = m - orig;
295 if (DO_UTF8(sv))
296 sv_pos_b2u(sv, &i);
297 mg->mg_len = i;
298 }
988e6e7e 299 if (old != rx)
454f1e26 300 (void)ReREFCNT_inc(rx);
d9f97599
GS
301 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
302 rxres_save(&cx->sb_rxres, rx);
a0d0e21e
LW
303 RETURNOP(pm->op_pmreplstart);
304}
305
c90c0ff4 306void
864dbfa3 307Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
308{
309 UV *p = (UV*)*rsp;
310 U32 i;
96a5add6 311 PERL_UNUSED_CONTEXT;
c90c0ff4 312
d9f97599 313 if (!p || p[1] < rx->nparens) {
f8c7b90f 314#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
315 i = 7 + rx->nparens * 2;
316#else
d9f97599 317 i = 6 + rx->nparens * 2;
ed252734 318#endif
c90c0ff4 319 if (!p)
a02a5408 320 Newx(p, i, UV);
c90c0ff4
PP
321 else
322 Renew(p, i, UV);
323 *rsp = (void*)p;
324 }
325
c445ea15 326 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? rx->subbeg : NULL);
cf93c79d 327 RX_MATCH_COPIED_off(rx);
c90c0ff4 328
f8c7b90f 329#ifdef PERL_OLD_COPY_ON_WRITE
ed252734 330 *p++ = PTR2UV(rx->saved_copy);
c445ea15 331 rx->saved_copy = NULL;
ed252734
NC
332#endif
333
d9f97599 334 *p++ = rx->nparens;
c90c0ff4 335
56431972 336 *p++ = PTR2UV(rx->subbeg);
cf93c79d 337 *p++ = (UV)rx->sublen;
d9f97599
GS
338 for (i = 0; i <= rx->nparens; ++i) {
339 *p++ = (UV)rx->startp[i];
340 *p++ = (UV)rx->endp[i];
c90c0ff4
PP
341 }
342}
343
344void
864dbfa3 345Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP
346{
347 UV *p = (UV*)*rsp;
348 U32 i;
96a5add6 349 PERL_UNUSED_CONTEXT;
c90c0ff4 350
ed252734 351 RX_MATCH_COPY_FREE(rx);
cf93c79d 352 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP
353 *p++ = 0;
354
f8c7b90f 355#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
356 if (rx->saved_copy)
357 SvREFCNT_dec (rx->saved_copy);
358 rx->saved_copy = INT2PTR(SV*,*p);
359 *p++ = 0;
360#endif
361
d9f97599 362 rx->nparens = *p++;
c90c0ff4 363
56431972 364 rx->subbeg = INT2PTR(char*,*p++);
cf93c79d 365 rx->sublen = (I32)(*p++);
d9f97599 366 for (i = 0; i <= rx->nparens; ++i) {
cf93c79d
IZ
367 rx->startp[i] = (I32)(*p++);
368 rx->endp[i] = (I32)(*p++);
c90c0ff4
PP
369 }
370}
371
372void
864dbfa3 373Perl_rxres_free(pTHX_ void **rsp)
c90c0ff4 374{
44f8325f 375 UV * const p = (UV*)*rsp;
96a5add6 376 PERL_UNUSED_CONTEXT;
c90c0ff4
PP
377
378 if (p) {
94010e71
NC
379#ifdef PERL_POISON
380 void *tmp = INT2PTR(char*,*p);
381 Safefree(tmp);
382 if (*p)
7e337ee0 383 PoisonFree(*p, 1, sizeof(*p));
94010e71 384#else
56431972 385 Safefree(INT2PTR(char*,*p));
94010e71 386#endif
f8c7b90f 387#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC
388 if (p[1]) {
389 SvREFCNT_dec (INT2PTR(SV*,p[1]));
390 }
391#endif
c90c0ff4 392 Safefree(p);
4608196e 393 *rsp = NULL;
c90c0ff4
PP
394 }
395}
396
a0d0e21e
LW
397PP(pp_formline)
398{
97aff369 399 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 400 register SV * const tmpForm = *++MARK;
dea28490 401 register U32 *fpc;
a0d0e21e 402 register char *t;
245d4a47 403 const char *f;
a0d0e21e 404 register I32 arg;
c445ea15
AL
405 register SV *sv = NULL;
406 const char *item = NULL;
9c5ffd7c
JH
407 I32 itemsize = 0;
408 I32 fieldsize = 0;
a0d0e21e 409 I32 lines = 0;
c445ea15
AL
410 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
411 const char *chophere = NULL;
412 char *linemark = NULL;
65202027 413 NV value;
9c5ffd7c 414 bool gotsome = FALSE;
a0d0e21e 415 STRLEN len;
823a54a3 416 const STRLEN fudge = SvPOK(tmpForm)
24c89738 417 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH
418 bool item_is_utf8 = FALSE;
419 bool targ_is_utf8 = FALSE;
c445ea15 420 SV * nsv = NULL;
cbbf8932 421 OP * parseres = NULL;
bfed75c6 422 const char *fmt;
a1b95068 423 bool oneline;
a0d0e21e 424
76e3520e 425 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS
426 if (SvREADONLY(tmpForm)) {
427 SvREADONLY_off(tmpForm);
a1b95068 428 parseres = doparseform(tmpForm);
445b3f51
GS
429 SvREADONLY_on(tmpForm);
430 }
431 else
a1b95068
LW
432 parseres = doparseform(tmpForm);
433 if (parseres)
434 return parseres;
a0d0e21e 435 }
3280af22 436 SvPV_force(PL_formtarget, len);
1bd51a4c
IH
437 if (DO_UTF8(PL_formtarget))
438 targ_is_utf8 = TRUE;
a0ed51b3 439 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 440 t += len;
245d4a47 441 f = SvPV_const(tmpForm, len);
a0d0e21e 442 /* need to jump to the next word */
245d4a47 443 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW
444
445 for (;;) {
446 DEBUG_f( {
bfed75c6 447 const char *name = "???";
a0d0e21e
LW
448 arg = -1;
449 switch (*fpc) {
450 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
451 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
452 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
453 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
454 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
455
456 case FF_CHECKNL: name = "CHECKNL"; break;
457 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
458 case FF_SPACE: name = "SPACE"; break;
459 case FF_HALFSPACE: name = "HALFSPACE"; break;
460 case FF_ITEM: name = "ITEM"; break;
461 case FF_CHOP: name = "CHOP"; break;
462 case FF_LINEGLOB: name = "LINEGLOB"; break;
463 case FF_NEWLINE: name = "NEWLINE"; break;
464 case FF_MORE: name = "MORE"; break;
465 case FF_LINEMARK: name = "LINEMARK"; break;
466 case FF_END: name = "END"; break;
bfed75c6 467 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 468 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW
469 }
470 if (arg >= 0)
bf49b057 471 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 472 else
bf49b057 473 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 474 } );
a0d0e21e
LW
475 switch (*fpc++) {
476 case FF_LINEMARK:
477 linemark = t;
a0d0e21e
LW
478 lines++;
479 gotsome = FALSE;
480 break;
481
482 case FF_LITERAL:
483 arg = *fpc++;
1bd51a4c 484 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 485 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH
486 *t = '\0';
487 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
488 t = SvEND(PL_formtarget);
1bd51a4c
IH
489 break;
490 }
491 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 492 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
493 *t = '\0';
494 sv_utf8_upgrade(PL_formtarget);
495 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
496 t = SvEND(PL_formtarget);
497 targ_is_utf8 = TRUE;
498 }
a0d0e21e
LW
499 while (arg--)
500 *t++ = *f++;
501 break;
502
503 case FF_SKIP:
504 f += *fpc++;
505 break;
506
507 case FF_FETCH:
508 arg = *fpc++;
509 f += arg;
510 fieldsize = arg;
511
512 if (MARK < SP)
513 sv = *++MARK;
514 else {
3280af22 515 sv = &PL_sv_no;
599cee73 516 if (ckWARN(WARN_SYNTAX))
9014280d 517 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW
518 }
519 break;
520
521 case FF_CHECKNL:
5a34cab7
NC
522 {
523 const char *send;
524 const char *s = item = SvPV_const(sv, len);
525 itemsize = len;
526 if (DO_UTF8(sv)) {
527 itemsize = sv_len_utf8(sv);
528 if (itemsize != (I32)len) {
529 I32 itembytes;
530 if (itemsize > fieldsize) {
531 itemsize = fieldsize;
532 itembytes = itemsize;
533 sv_pos_u2b(sv, &itembytes, 0);
534 }
535 else
536 itembytes = len;
537 send = chophere = s + itembytes;
538 while (s < send) {
539 if (*s & ~31)
540 gotsome = TRUE;
541 else if (*s == '\n')
542 break;
543 s++;
544 }
545 item_is_utf8 = TRUE;
546 itemsize = s - item;
547 sv_pos_b2u(sv, &itemsize);
548 break;
a0ed51b3 549 }
a0ed51b3 550 }
5a34cab7
NC
551 item_is_utf8 = FALSE;
552 if (itemsize > fieldsize)
553 itemsize = fieldsize;
554 send = chophere = s + itemsize;
555 while (s < send) {
556 if (*s & ~31)
557 gotsome = TRUE;
558 else if (*s == '\n')
559 break;
560 s++;
561 }
562 itemsize = s - item;
563 break;
a0ed51b3 564 }
a0d0e21e
LW
565
566 case FF_CHECKCHOP:
5a34cab7
NC
567 {
568 const char *s = item = SvPV_const(sv, len);
569 itemsize = len;
570 if (DO_UTF8(sv)) {
571 itemsize = sv_len_utf8(sv);
572 if (itemsize != (I32)len) {
573 I32 itembytes;
574 if (itemsize <= fieldsize) {
575 const char *send = chophere = s + itemsize;
576 while (s < send) {
577 if (*s == '\r') {
578 itemsize = s - item;
a0ed51b3 579 chophere = s;
a0ed51b3 580 break;
5a34cab7
NC
581 }
582 if (*s++ & ~31)
a0ed51b3 583 gotsome = TRUE;
a0ed51b3 584 }
a0ed51b3 585 }
5a34cab7
NC
586 else {
587 const char *send;
588 itemsize = fieldsize;
589 itembytes = itemsize;
590 sv_pos_u2b(sv, &itembytes, 0);
591 send = chophere = s + itembytes;
592 while (s < send || (s == send && isSPACE(*s))) {
593 if (isSPACE(*s)) {
594 if (chopspace)
595 chophere = s;
596 if (*s == '\r')
597 break;
598 }
599 else {
600 if (*s & ~31)
601 gotsome = TRUE;
602 if (strchr(PL_chopset, *s))
603 chophere = s + 1;
604 }
605 s++;
606 }
607 itemsize = chophere - item;
608 sv_pos_b2u(sv, &itemsize);
609 }
610 item_is_utf8 = TRUE;
a0d0e21e
LW
611 break;
612 }
a0d0e21e 613 }
5a34cab7
NC
614 item_is_utf8 = FALSE;
615 if (itemsize <= fieldsize) {
616 const char *const send = chophere = s + itemsize;
617 while (s < send) {
618 if (*s == '\r') {
619 itemsize = s - item;
a0d0e21e 620 chophere = s;
a0d0e21e 621 break;
5a34cab7
NC
622 }
623 if (*s++ & ~31)
a0d0e21e 624 gotsome = TRUE;
a0d0e21e 625 }
a0d0e21e 626 }
5a34cab7
NC
627 else {
628 const char *send;
629 itemsize = fieldsize;
630 send = chophere = s + itemsize;
631 while (s < send || (s == send && isSPACE(*s))) {
632 if (isSPACE(*s)) {
633 if (chopspace)
634 chophere = s;
635 if (*s == '\r')
636 break;
637 }
638 else {
639 if (*s & ~31)
640 gotsome = TRUE;
641 if (strchr(PL_chopset, *s))
642 chophere = s + 1;
643 }
644 s++;
645 }
646 itemsize = chophere - item;
647 }
648 break;
a0d0e21e 649 }
a0d0e21e
LW
650
651 case FF_SPACE:
652 arg = fieldsize - itemsize;
653 if (arg) {
654 fieldsize -= arg;
655 while (arg-- > 0)
656 *t++ = ' ';
657 }
658 break;
659
660 case FF_HALFSPACE:
661 arg = fieldsize - itemsize;
662 if (arg) {
663 arg /= 2;
664 fieldsize -= arg;
665 while (arg-- > 0)
666 *t++ = ' ';
667 }
668 break;
669
670 case FF_ITEM:
5a34cab7
NC
671 {
672 const char *s = item;
673 arg = itemsize;
674 if (item_is_utf8) {
675 if (!targ_is_utf8) {
676 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
677 *t = '\0';
678 sv_utf8_upgrade(PL_formtarget);
679 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
680 t = SvEND(PL_formtarget);
681 targ_is_utf8 = TRUE;
a0ed51b3 682 }
5a34cab7
NC
683 while (arg--) {
684 if (UTF8_IS_CONTINUED(*s)) {
685 STRLEN skip = UTF8SKIP(s);
686 switch (skip) {
687 default:
688 Move(s,t,skip,char);
689 s += skip;
690 t += skip;
691 break;
692 case 7: *t++ = *s++;
693 case 6: *t++ = *s++;
694 case 5: *t++ = *s++;
695 case 4: *t++ = *s++;
696 case 3: *t++ = *s++;
697 case 2: *t++ = *s++;
698 case 1: *t++ = *s++;
699 }
700 }
701 else {
702 if ( !((*t++ = *s++) & ~31) )
703 t[-1] = ' ';
704 }
a0ed51b3 705 }
5a34cab7 706 break;
a0ed51b3 707 }
5a34cab7
NC
708 if (targ_is_utf8 && !item_is_utf8) {
709 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
710 *t = '\0';
711 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
712 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 713#ifdef EBCDIC
901017d6 714 const int ch = *t;
5a34cab7 715 if (iscntrl(ch))
78da4d13 716#else
5a34cab7 717 if (!(*t & ~31))
78da4d13 718#endif
5a34cab7
NC
719 *t = ' ';
720 }
721 break;
78da4d13 722 }
5a34cab7 723 while (arg--) {
9d116dd7 724#ifdef EBCDIC
901017d6 725 const int ch = *t++ = *s++;
5a34cab7 726 if (iscntrl(ch))
a0d0e21e 727#else
5a34cab7 728 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 729#endif
5a34cab7
NC
730 t[-1] = ' ';
731 }
732 break;
a0d0e21e 733 }
a0d0e21e
LW
734
735 case FF_CHOP:
5a34cab7
NC
736 {
737 const char *s = chophere;
738 if (chopspace) {
af68e756 739 while (isSPACE(*s))
5a34cab7
NC
740 s++;
741 }
742 sv_chop(sv,s);
743 SvSETMAGIC(sv);
744 break;
a0d0e21e 745 }
a0d0e21e 746
a1b95068
LW
747 case FF_LINESNGL:
748 chopspace = 0;
749 oneline = TRUE;
750 goto ff_line;
a0d0e21e 751 case FF_LINEGLOB:
a1b95068
LW
752 oneline = FALSE;
753 ff_line:
5a34cab7
NC
754 {
755 const char *s = item = SvPV_const(sv, len);
756 itemsize = len;
757 if ((item_is_utf8 = DO_UTF8(sv)))
758 itemsize = sv_len_utf8(sv);
759 if (itemsize) {
760 bool chopped = FALSE;
761 const char *const send = s + len;
762 gotsome = TRUE;
763 chophere = s + itemsize;
764 while (s < send) {
765 if (*s++ == '\n') {
766 if (oneline) {
767 chopped = TRUE;
768 chophere = s;
769 break;
770 } else {
771 if (s == send) {
772 itemsize--;
773 chopped = TRUE;
774 } else
775 lines++;
776 }
1bd51a4c 777 }
a0d0e21e 778 }
5a34cab7
NC
779 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
780 if (targ_is_utf8)
781 SvUTF8_on(PL_formtarget);
782 if (oneline) {
783 SvCUR_set(sv, chophere - item);
784 sv_catsv(PL_formtarget, sv);
785 SvCUR_set(sv, itemsize);
786 } else
787 sv_catsv(PL_formtarget, sv);
788 if (chopped)
789 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) - 1);
790 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
791 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
792 if (item_is_utf8)
793 targ_is_utf8 = TRUE;
a0d0e21e 794 }
5a34cab7 795 break;
a0d0e21e 796 }
a0d0e21e 797
a1b95068
LW
798 case FF_0DECIMAL:
799 arg = *fpc++;
800#if defined(USE_LONG_DOUBLE)
801 fmt = (arg & 256) ? "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl;
802#else
803 fmt = (arg & 256) ? "%#0*.*f" : "%0*.*f";
804#endif
805 goto ff_dec;
a0d0e21e 806 case FF_DECIMAL:
a0d0e21e 807 arg = *fpc++;
65202027 808#if defined(USE_LONG_DOUBLE)
a1b95068 809 fmt = (arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl;
65202027 810#else
a1b95068 811 fmt = (arg & 256) ? "%#*.*f" : "%*.*f";
65202027 812#endif
a1b95068 813 ff_dec:
784707d5
JP
814 /* If the field is marked with ^ and the value is undefined,
815 blank it out. */
784707d5
JP
816 if ((arg & 512) && !SvOK(sv)) {
817 arg = fieldsize;
818 while (arg--)
819 *t++ = ' ';
820 break;
821 }
822 gotsome = TRUE;
823 value = SvNV(sv);
a1b95068 824 /* overflow evidence */
bfed75c6 825 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW
826 arg = fieldsize;
827 while (arg--)
828 *t++ = '#';
829 break;
830 }
784707d5
JP
831 /* Formats aren't yet marked for locales, so assume "yes". */
832 {
833 STORE_NUMERIC_STANDARD_SET_LOCAL();
a1b95068 834 sprintf(t, fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP
835 RESTORE_NUMERIC_STANDARD();
836 }
837 t += fieldsize;
838 break;
a1b95068 839
a0d0e21e
LW
840 case FF_NEWLINE:
841 f++;
842 while (t-- > linemark && *t == ' ') ;
843 t++;
844 *t++ = '\n';
845 break;
846
847 case FF_BLANK:
848 arg = *fpc++;
849 if (gotsome) {
850 if (arg) { /* repeat until fields exhausted? */
851 *t = '\0';
b15aece3 852 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 853 lines += FmLINES(PL_formtarget);
a0d0e21e
LW
854 if (lines == 200) {
855 arg = t - linemark;
856 if (strnEQ(linemark, linemark - arg, arg))
cea2e8a9 857 DIE(aTHX_ "Runaway format");
a0d0e21e 858 }
1bd51a4c
IH
859 if (targ_is_utf8)
860 SvUTF8_on(PL_formtarget);
3280af22 861 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW
862 SP = ORIGMARK;
863 RETURNOP(cLISTOP->op_first);
864 }
865 }
866 else {
867 t = linemark;
868 lines--;
869 }
870 break;
871
872 case FF_MORE:
5a34cab7
NC
873 {
874 const char *s = chophere;
875 const char *send = item + len;
876 if (chopspace) {
af68e756 877 while (isSPACE(*s) && (s < send))
5a34cab7 878 s++;
a0d0e21e 879 }
5a34cab7
NC
880 if (s < send) {
881 char *s1;
882 arg = fieldsize - itemsize;
883 if (arg) {
884 fieldsize -= arg;
885 while (arg-- > 0)
886 *t++ = ' ';
887 }
888 s1 = t - 3;
889 if (strnEQ(s1," ",3)) {
890 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
891 s1--;
892 }
893 *s1++ = '.';
894 *s1++ = '.';
895 *s1++ = '.';
a0d0e21e 896 }
5a34cab7 897 break;
a0d0e21e 898 }
a0d0e21e
LW
899 case FF_END:
900 *t = '\0';
b15aece3 901 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH
902 if (targ_is_utf8)
903 SvUTF8_on(PL_formtarget);
3280af22 904 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW
905 SP = ORIGMARK;
906 RETPUSHYES;
907 }
908 }
909}
910
911PP(pp_grepstart)
912{
27da23d5 913 dVAR; dSP;
a0d0e21e
LW
914 SV *src;
915
3280af22 916 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 917 (void)POPMARK;
54310121 918 if (GIMME_V == G_SCALAR)
0b024f31 919 XPUSHs(sv_2mortal(newSViv(0)));
533c011a 920 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 921 }
3280af22 922 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS
923 pp_pushmark(); /* push dst */
924 pp_pushmark(); /* push src */
a0d0e21e
LW
925 ENTER; /* enter outer scope */
926
927 SAVETMPS;
59f00321
RGS
928 if (PL_op->op_private & OPpGREP_LEX)
929 SAVESPTR(PAD_SVl(PL_op->op_targ));
930 else
931 SAVE_DEFSV;
a0d0e21e 932 ENTER; /* enter inner scope */
7766f137 933 SAVEVPTR(PL_curpm);
a0d0e21e 934
3280af22 935 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 936 SvTEMP_off(src);
59f00321
RGS
937 if (PL_op->op_private & OPpGREP_LEX)
938 PAD_SVl(PL_op->op_targ) = src;
939 else
940 DEFSV = src;
a0d0e21e
LW
941
942 PUTBACK;
533c011a 943 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 944 pp_pushmark(); /* push top */
533c011a 945 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW
946}
947
a0d0e21e
LW
948PP(pp_mapwhile)
949{
27da23d5 950 dVAR; dSP;
f54cb97a 951 const I32 gimme = GIMME_V;
544f3153 952 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW
953 I32 count;
954 I32 shift;
955 SV** src;
ac27b0f5 956 SV** dst;
a0d0e21e 957
544f3153 958 /* first, move source pointer to the next item in the source list */
3280af22 959 ++PL_markstack_ptr[-1];
544f3153
GS
960
961 /* if there are new items, push them into the destination list */
4c90a460 962 if (items && gimme != G_VOID) {
544f3153
GS
963 /* might need to make room back there first */
964 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
965 /* XXX this implementation is very pessimal because the stack
966 * is repeatedly extended for every set of items. Is possible
967 * to do this without any stack extension or copying at all
968 * by maintaining a separate list over which the map iterates
18ef8bea 969 * (like foreach does). --gsar */
544f3153
GS
970
971 /* everything in the stack after the destination list moves
972 * towards the end the stack by the amount of room needed */
973 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
974
975 /* items to shift up (accounting for the moved source pointer) */
976 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT
977
978 /* This optimization is by Ben Tilly and it does
979 * things differently from what Sarathy (gsar)
980 * is describing. The downside of this optimization is
981 * that leaves "holes" (uninitialized and hopefully unused areas)
982 * to the Perl stack, but on the other hand this
983 * shouldn't be a problem. If Sarathy's idea gets
984 * implemented, this optimization should become
985 * irrelevant. --jhi */
986 if (shift < count)
987 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 988
924508f0
GS
989 EXTEND(SP,shift);
990 src = SP;
991 dst = (SP += shift);
3280af22
NIS
992 PL_markstack_ptr[-1] += shift;
993 *PL_markstack_ptr += shift;
544f3153 994 while (count--)
a0d0e21e
LW
995 *dst-- = *src--;
996 }
544f3153 997 /* copy the new items down to the destination list */
ac27b0f5 998 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP
999 if (gimme == G_ARRAY) {
1000 while (items-- > 0)
1001 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1002 }
bfed75c6 1003 else {
22023b26
TP
1004 /* scalar context: we don't care about which values map returns
1005 * (we use undef here). And so we certainly don't want to do mortal
1006 * copies of meaningless values. */
1007 while (items-- > 0) {
b988aa42 1008 (void)POPs;
22023b26
TP
1009 *dst-- = &PL_sv_undef;
1010 }
1011 }
a0d0e21e
LW
1012 }
1013 LEAVE; /* exit inner scope */
1014
1015 /* All done yet? */
3280af22 1016 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW
1017
1018 (void)POPMARK; /* pop top */
1019 LEAVE; /* exit outer scope */
1020 (void)POPMARK; /* pop src */
3280af22 1021 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1022 (void)POPMARK; /* pop dst */
3280af22 1023 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1024 if (gimme == G_SCALAR) {
7cc47870
RGS
1025 if (PL_op->op_private & OPpGREP_LEX) {
1026 SV* sv = sv_newmortal();
1027 sv_setiv(sv, items);
1028 PUSHs(sv);
1029 }
1030 else {
1031 dTARGET;
1032 XPUSHi(items);
1033 }
a0d0e21e 1034 }
54310121
PP
1035 else if (gimme == G_ARRAY)
1036 SP += items;
a0d0e21e
LW
1037 RETURN;
1038 }
1039 else {
1040 SV *src;
1041
1042 ENTER; /* enter inner scope */
7766f137 1043 SAVEVPTR(PL_curpm);
a0d0e21e 1044
544f3153 1045 /* set $_ to the new source item */
3280af22 1046 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1047 SvTEMP_off(src);
59f00321
RGS
1048 if (PL_op->op_private & OPpGREP_LEX)
1049 PAD_SVl(PL_op->op_targ) = src;
1050 else
1051 DEFSV = src;
a0d0e21e
LW
1052
1053 RETURNOP(cLOGOP->op_other);
1054 }
1055}
1056
a0d0e21e
LW
1057/* Range stuff. */
1058
1059PP(pp_range)
1060{
97aff369 1061 dVAR;
a0d0e21e 1062 if (GIMME == G_ARRAY)
1a67a97c 1063 return NORMAL;
538573f7 1064 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1065 return cLOGOP->op_other;
538573f7 1066 else
1a67a97c 1067 return NORMAL;
a0d0e21e
LW
1068}
1069
1070PP(pp_flip)
1071{
97aff369 1072 dVAR;
39644a26 1073 dSP;
a0d0e21e
LW
1074
1075 if (GIMME == G_ARRAY) {
1a67a97c 1076 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1077 }
1078 else {
1079 dTOPss;
44f8325f 1080 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1081 int flip = 0;
790090df 1082
bfed75c6 1083 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST
1084 if (GvIO(PL_last_in_gv)) {
1085 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1086 }
1087 else {
fafc274c 1088 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL
1089 if (gv && GvSV(gv))
1090 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1091 }
bfed75c6
AL
1092 } else {
1093 flip = SvTRUE(sv);
1094 }
1095 if (flip) {
a0d0e21e 1096 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1097 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1098 sv_setiv(targ, 1);
3e3baf6d 1099 SETs(targ);
a0d0e21e
LW
1100 RETURN;
1101 }
1102 else {
1103 sv_setiv(targ, 0);
924508f0 1104 SP--;
1a67a97c 1105 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW
1106 }
1107 }
c69006e4 1108 sv_setpvn(TARG, "", 0);
a0d0e21e
LW
1109 SETs(targ);
1110 RETURN;
1111 }
1112}
1113
8e9bbdb9
RGS
1114/* This code tries to decide if "$left .. $right" should use the
1115 magical string increment, or if the range is numeric (we make
1116 an exception for .."0" [#18165]). AMS 20021031. */
1117
1118#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS
1119 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1120 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1121 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1122 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1123 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1124
a0d0e21e
LW
1125PP(pp_flop)
1126{
97aff369 1127 dVAR; dSP;
a0d0e21e
LW
1128
1129 if (GIMME == G_ARRAY) {
1130 dPOPPOPssrl;
86cb7173 1131
5b295bef
RD
1132 SvGETMAGIC(left);
1133 SvGETMAGIC(right);
a0d0e21e 1134
8e9bbdb9 1135 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL
1136 register IV i, j;
1137 IV max;
4fe3f0fa
MHM
1138 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1139 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1140 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW
1141 i = SvIV(left);
1142 max = SvIV(right);
bbce6d69 1143 if (max >= i) {
c1ab3db2
AK
1144 j = max - i + 1;
1145 EXTEND_MORTAL(j);
1146 EXTEND(SP, j);
bbce6d69 1147 }
c1ab3db2
AK
1148 else
1149 j = 0;
1150 while (j--) {
901017d6 1151 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW
1152 PUSHs(sv);
1153 }
1154 }
1155 else {
44f8325f 1156 SV * const final = sv_mortalcopy(right);
13c5b33c 1157 STRLEN len;
823a54a3 1158 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1159
901017d6 1160 SV *sv = sv_mortalcopy(left);
13c5b33c 1161 SvPV_force_nolen(sv);
89ea2908 1162 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1163 XPUSHs(sv);
b15aece3 1164 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1165 break;
a0d0e21e
LW
1166 sv = sv_2mortal(newSVsv(sv));
1167 sv_inc(sv);
1168 }
a0d0e21e
LW
1169 }
1170 }
1171 else {
1172 dTOPss;
901017d6 1173 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1174 int flop = 0;
a0d0e21e 1175 sv_inc(targ);
4e3399f9
YST
1176
1177 if (PL_op->op_private & OPpFLIP_LINENUM) {
1178 if (GvIO(PL_last_in_gv)) {
1179 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1180 }
1181 else {
fafc274c 1182 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST
1183 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1184 }
1185 }
1186 else {
1187 flop = SvTRUE(sv);
1188 }
1189
1190 if (flop) {
a0d0e21e 1191 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1192 sv_catpvs(targ, "E0");
a0d0e21e
LW
1193 }
1194 SETs(targ);
1195 }
1196
1197 RETURN;
1198}
1199
1200/* Control. */
1201
27da23d5 1202static const char * const context_name[] = {
515afda2
NC
1203 "pseudo-block",
1204 "subroutine",
1205 "eval",
1206 "loop",
1207 "substitution",
1208 "block",
0d863452
RH
1209 "format",
1210 "given",
1211 "when"
515afda2
NC
1212};
1213
76e3520e 1214STATIC I32
06b5626a 1215S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1216{
97aff369 1217 dVAR;
a0d0e21e 1218 register I32 i;
a0d0e21e
LW
1219
1220 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1221 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1222 switch (CxTYPE(cx)) {
a0d0e21e 1223 case CXt_SUBST:
a0d0e21e 1224 case CXt_SUB:
7766f137 1225 case CXt_FORMAT:
a0d0e21e 1226 case CXt_EVAL:
0a753a76 1227 case CXt_NULL:
0d863452
RH
1228 case CXt_GIVEN:
1229 case CXt_WHEN:
e476b1b5 1230 if (ckWARN(WARN_EXITING))
515afda2
NC
1231 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1232 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1233 if (CxTYPE(cx) == CXt_NULL)
1234 return -1;
1235 break;
a0d0e21e 1236 case CXt_LOOP:
901017d6 1237 if ( !cx->blk_loop.label || strNE(label, cx->blk_loop.label) ) {
cea2e8a9 1238 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
68dc0745 1239 (long)i, cx->blk_loop.label));
a0d0e21e
LW
1240 continue;
1241 }
cea2e8a9 1242 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW
1243 return i;
1244 }
1245 }
1246 return i;
1247}
1248
0d863452
RH
1249
1250
e50aee73 1251I32
864dbfa3 1252Perl_dowantarray(pTHX)
e50aee73 1253{
97aff369 1254 dVAR;
f54cb97a 1255 const I32 gimme = block_gimme();
54310121
PP
1256 return (gimme == G_VOID) ? G_SCALAR : gimme;
1257}
1258
1259I32
864dbfa3 1260Perl_block_gimme(pTHX)
54310121 1261{
97aff369 1262 dVAR;
06b5626a 1263 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1264 if (cxix < 0)
46fc3d4c 1265 return G_VOID;
e50aee73 1266
54310121 1267 switch (cxstack[cxix].blk_gimme) {
d2719217
GS
1268 case G_VOID:
1269 return G_VOID;
54310121 1270 case G_SCALAR:
e50aee73 1271 return G_SCALAR;
54310121
PP
1272 case G_ARRAY:
1273 return G_ARRAY;
1274 default:
cea2e8a9 1275 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS
1276 /* NOTREACHED */
1277 return 0;
54310121 1278 }
e50aee73
AD
1279}
1280
78f9721b
SM
1281I32
1282Perl_is_lvalue_sub(pTHX)
1283{
97aff369 1284 dVAR;
06b5626a 1285 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM
1286 assert(cxix >= 0); /* We should only be called from inside subs */
1287
1288 if (cxstack[cxix].blk_sub.lval && CvLVALUE(cxstack[cxix].blk_sub.cv))
1289 return cxstack[cxix].blk_sub.lval;
1290 else
1291 return 0;
1292}
1293
76e3520e 1294STATIC I32
cea2e8a9 1295S_dopoptosub(pTHX_ I32 startingblock)
a0d0e21e 1296{
97aff369 1297 dVAR;
2c375eb9
GS
1298 return dopoptosub_at(cxstack, startingblock);
1299}
1300
1301STATIC I32
901017d6 1302S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1303{
97aff369 1304 dVAR;
a0d0e21e 1305 I32 i;
a0d0e21e 1306 for (i = startingblock; i >= 0; i--) {
901017d6 1307 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1308 switch (CxTYPE(cx)) {
a0d0e21e
LW
1309 default:
1310 continue;
1311 case CXt_EVAL:
1312 case CXt_SUB:
7766f137 1313 case CXt_FORMAT:
cea2e8a9 1314 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW
1315 return i;
1316 }
1317 }
1318 return i;
1319}
1320
76e3520e 1321STATIC I32
cea2e8a9 1322S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1323{
97aff369 1324 dVAR;
a0d0e21e 1325 I32 i;
a0d0e21e 1326 for (i = startingblock; i >= 0; i--) {
06b5626a 1327 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1328 switch (CxTYPE(cx)) {
a0d0e21e
LW
1329 default:
1330 continue;
1331 case CXt_EVAL:
cea2e8a9 1332 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW
1333 return i;
1334 }
1335 }
1336 return i;
1337}
1338
76e3520e 1339STATIC I32
cea2e8a9 1340S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1341{
97aff369 1342 dVAR;
a0d0e21e 1343 I32 i;
a0d0e21e 1344 for (i = startingblock; i >= 0; i--) {
901017d6 1345 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1346 switch (CxTYPE(cx)) {
a0d0e21e 1347 case CXt_SUBST:
a0d0e21e 1348 case CXt_SUB:
7766f137 1349 case CXt_FORMAT:
a0d0e21e 1350 case CXt_EVAL:
0a753a76 1351 case CXt_NULL:
e476b1b5 1352 if (ckWARN(WARN_EXITING))
515afda2
NC
1353 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1354 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1355 if ((CxTYPE(cx)) == CXt_NULL)
1356 return -1;
1357 break;
a0d0e21e 1358 case CXt_LOOP:
cea2e8a9 1359 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW
1360 return i;
1361 }
1362 }
1363 return i;
1364}
1365
0d863452
RH
1366STATIC I32
1367S_dopoptogiven(pTHX_ I32 startingblock)
1368{
97aff369 1369 dVAR;
0d863452
RH
1370 I32 i;
1371 for (i = startingblock; i >= 0; i--) {
1372 register const PERL_CONTEXT *cx = &cxstack[i];
1373 switch (CxTYPE(cx)) {
1374 default:
1375 continue;
1376 case CXt_GIVEN:
1377 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1378 return i;
1379 case CXt_LOOP:
1380 if (CxFOREACHDEF(cx)) {
1381 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1382 return i;
1383 }
1384 }
1385 }
1386 return i;
1387}
1388
1389STATIC I32
1390S_dopoptowhen(pTHX_ I32 startingblock)
1391{
97aff369 1392 dVAR;
0d863452
RH
1393 I32 i;
1394 for (i = startingblock; i >= 0; i--) {
1395 register const PERL_CONTEXT *cx = &cxstack[i];
1396 switch (CxTYPE(cx)) {
1397 default:
1398 continue;
1399 case CXt_WHEN:
1400 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1401 return i;
1402 }
1403 }
1404 return i;
1405}
1406
a0d0e21e 1407void
864dbfa3 1408Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1409{
97aff369 1410 dVAR;
a0d0e21e
LW
1411 I32 optype;
1412
1413 while (cxstack_ix > cxix) {
b0d9ce38 1414 SV *sv;
06b5626a 1415 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1416 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1417 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1418 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1419 switch (CxTYPE(cx)) {
c90c0ff4
PP
1420 case CXt_SUBST:
1421 POPSUBST(cx);
1422 continue; /* not break */
a0d0e21e 1423 case CXt_SUB:
b0d9ce38
GS
1424 POPSUB(cx,sv);
1425 LEAVESUB(sv);
a0d0e21e
LW
1426 break;
1427 case CXt_EVAL:
1428 POPEVAL(cx);
1429 break;
1430 case CXt_LOOP:
1431 POPLOOP(cx);
1432 break;
0a753a76 1433 case CXt_NULL:
a0d0e21e 1434 break;
7766f137
GS
1435 case CXt_FORMAT:
1436 POPFORMAT(cx);
1437 break;
a0d0e21e 1438 }
c90c0ff4 1439 cxstack_ix--;
a0d0e21e 1440 }
1b6737cc 1441 PERL_UNUSED_VAR(optype);
a0d0e21e
LW
1442}
1443
5a844595
GS
1444void
1445Perl_qerror(pTHX_ SV *err)
1446{
97aff369 1447 dVAR;
5a844595
GS
1448 if (PL_in_eval)
1449 sv_catsv(ERRSV, err);
1450 else if (PL_errors)
1451 sv_catsv(PL_errors, err);
1452 else
894356b3 1453 Perl_warn(aTHX_ "%"SVf, err);
5a844595
GS
1454 ++PL_error_count;
1455}
1456
a0d0e21e 1457OP *
35a4481c 1458Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1459{
27da23d5 1460 dVAR;
87582a92 1461
3280af22 1462 if (PL_in_eval) {
a0d0e21e 1463 I32 cxix;
a0d0e21e 1464 I32 gimme;
a0d0e21e 1465
4e6ea2c3 1466 if (message) {
faef0170 1467 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1468 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1469 SV * const err = ERRSV;
c445ea15 1470 const char *e = NULL;
98eae8f5 1471 if (!SvPOK(err))
c69006e4 1472 sv_setpvn(err,"",0);
98eae8f5 1473 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1474 STRLEN len;
349d4f2f 1475 e = SvPV_const(err, len);
0510663f 1476 e += len - msglen;
98eae8f5 1477 if (*e != *message || strNE(e,message))
c445ea15 1478 e = NULL;
98eae8f5
GS
1479 }
1480 if (!e) {
1481 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1482 sv_catpvn(err, prefix, sizeof(prefix)-1);
1483 sv_catpvn(err, message, msglen);
e476b1b5 1484 if (ckWARN(WARN_MISC)) {
504618e9 1485 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1486 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1487 }
4633a7c4 1488 }
4633a7c4 1489 }
1aa99e6b 1490 else {
06bf62c7 1491 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1492 }
4633a7c4 1493 }
4e6ea2c3 1494
5a844595
GS
1495 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1496 && PL_curstackinfo->si_prev)
1497 {
bac4b2ad 1498 dounwind(-1);
d3acc0f7 1499 POPSTACK;
bac4b2ad 1500 }
e336de0d 1501
a0d0e21e
LW
1502 if (cxix >= 0) {
1503 I32 optype;
35a4481c 1504 register PERL_CONTEXT *cx;
901017d6 1505 SV **newsp;
a0d0e21e
LW
1506
1507 if (cxix < cxstack_ix)
1508 dounwind(cxix);
1509
3280af22 1510 POPBLOCK(cx,PL_curpm);
6b35e009 1511 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1512 if (!message)
349d4f2f 1513 message = SvPVx_const(ERRSV, msglen);
bf49b057
GS
1514 PerlIO_write(Perl_error_log, "panic: die ", 11);
1515 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW
1516 my_exit(1);
1517 }
1518 POPEVAL(cx);
1519
1520 if (gimme == G_SCALAR)
3280af22
NIS
1521 *++newsp = &PL_sv_undef;
1522 PL_stack_sp = newsp;
a0d0e21e
LW
1523
1524 LEAVE;
748a9306 1525
7fb6a879
GS
1526 /* LEAVE could clobber PL_curcop (see save_re_context())
1527 * XXX it might be better to find a way to avoid messing with
1528 * PL_curcop in save_re_context() instead, but this is a more
1529 * minimal fix --GSAR */
1530 PL_curcop = cx->blk_oldcop;
1531
7a2e2cd6 1532 if (optype == OP_REQUIRE) {
44f8325f 1533 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1534 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1535 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1536 &PL_sv_undef, 0);
5a844595
GS
1537 DIE(aTHX_ "%sCompilation failed in require",
1538 *msg ? msg : "Unknown error\n");
7a2e2cd6 1539 }
f39bc417
DM
1540 assert(CxTYPE(cx) == CXt_EVAL);
1541 return cx->blk_eval.retop;
a0d0e21e
LW
1542 }
1543 }
9cc2fdd3 1544 if (!message)
349d4f2f 1545 message = SvPVx_const(ERRSV, msglen);
87582a92 1546
7ff03255 1547 write_to_stderr(message, msglen);
f86702cc
PP
1548 my_failure_exit();
1549 /* NOTREACHED */
a0d0e21e
LW
1550 return 0;
1551}
1552
1553PP(pp_xor)
1554{
97aff369 1555 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW
1556 if (SvTRUE(left) != SvTRUE(right))
1557 RETSETYES;
1558 else
1559 RETSETNO;
1560}
1561
a0d0e21e
LW
1562PP(pp_caller)
1563{
97aff369 1564 dVAR;
39644a26 1565 dSP;
a0d0e21e 1566 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL
1567 register const PERL_CONTEXT *cx;
1568 register const PERL_CONTEXT *ccstack = cxstack;
1569 const PERL_SI *top_si = PL_curstackinfo;
54310121 1570 I32 gimme;
06b5626a 1571 const char *stashname;
a0d0e21e
LW
1572 I32 count = 0;
1573
1574 if (MAXARG)
1575 count = POPi;
27d41816 1576
a0d0e21e 1577 for (;;) {
2c375eb9
GS
1578 /* we may be in a higher stacklevel, so dig down deeper */
1579 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1580 top_si = top_si->si_prev;
1581 ccstack = top_si->si_cxstack;
1582 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1583 }
a0d0e21e 1584 if (cxix < 0) {
27d41816
DM
1585 if (GIMME != G_ARRAY) {
1586 EXTEND(SP, 1);
a0d0e21e 1587 RETPUSHUNDEF;
27d41816 1588 }
a0d0e21e
LW
1589 RETURN;
1590 }
f2a7f298 1591 /* caller() should not report the automatic calls to &DB::sub */
1592 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1593 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW
1594 count++;
1595 if (!count--)
1596 break;
2c375eb9 1597 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1598 }
2c375eb9
GS
1599
1600 cx = &ccstack[cxix];
7766f137 1601 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1602 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1603 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1604 field below is defined for any cx. */
f2a7f298 1605 /* caller() should not report the automatic calls to &DB::sub */
1606 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1607 cx = &ccstack[dbcxix];
06a5b730
PP
1608 }
1609
ed094faf 1610 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1611 if (GIMME != G_ARRAY) {
27d41816 1612 EXTEND(SP, 1);
ed094faf 1613 if (!stashname)
3280af22 1614 PUSHs(&PL_sv_undef);
49d8d3a1
MB
1615 else {
1616 dTARGET;
ed094faf 1617 sv_setpv(TARG, stashname);
49d8d3a1
MB
1618 PUSHs(TARG);
1619 }
a0d0e21e
LW
1620 RETURN;
1621 }
a0d0e21e 1622
b3ca2e83 1623 EXTEND(SP, 11);
27d41816 1624
ed094faf 1625 if (!stashname)
3280af22 1626 PUSHs(&PL_sv_undef);
49d8d3a1 1627 else
ed094faf 1628 PUSHs(sv_2mortal(newSVpv(stashname, 0)));
248c2a4d 1629 PUSHs(sv_2mortal(newSVpv(OutCopFILE(cx->blk_oldcop), 0)));
57843af0 1630 PUSHs(sv_2mortal(newSViv((I32)CopLINE(cx->blk_oldcop))));
a0d0e21e
LW
1631 if (!MAXARG)
1632 RETURN;
7766f137 1633 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1634 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1635 /* So is ccstack[dbcxix]. */
07b8c804 1636 if (isGV(cvgv)) {
561b68a9 1637 SV * const sv = newSV(0);
c445ea15 1638 gv_efullname3(sv, cvgv, NULL);
07b8c804
RGS
1639 PUSHs(sv_2mortal(sv));
1640 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1641 }
1642 else {
396482e1 1643 PUSHs(sv_2mortal(newSVpvs("(unknown)")));
72699b0f 1644 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804 1645 }
a0d0e21e
LW
1646 }
1647 else {
396482e1 1648 PUSHs(sv_2mortal(newSVpvs("(eval)")));
a0d0e21e
LW
1649 PUSHs(sv_2mortal(newSViv(0)));
1650 }
54310121
PP
1651 gimme = (I32)cx->blk_gimme;
1652 if (gimme == G_VOID)
3280af22 1653 PUSHs(&PL_sv_undef);
54310121
PP
1654 else
1655 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
6b35e009 1656 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1657 /* eval STRING */
06a5b730 1658 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1659 PUSHs(cx->blk_eval.cur_text);
3280af22 1660 PUSHs(&PL_sv_no);
0f79a09d 1661 }
811a4de9 1662 /* require */
0f79a09d
GS
1663 else if (cx->blk_eval.old_namesv) {
1664 PUSHs(sv_2mortal(newSVsv(cx->blk_eval.old_namesv)));
3280af22 1665 PUSHs(&PL_sv_yes);
06a5b730 1666 }
811a4de9
GS
1667 /* eval BLOCK (try blocks have old_namesv == 0) */
1668 else {
1669 PUSHs(&PL_sv_undef);
1670 PUSHs(&PL_sv_undef);
1671 }
4633a7c4 1672 }
a682de96
GS
1673 else {
1674 PUSHs(&PL_sv_undef);
1675 PUSHs(&PL_sv_undef);
1676 }
1677 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
ed094faf 1678 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1679 {
66a1b24b
AL
1680 AV * const ary = cx->blk_sub.argarray;
1681 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1682
3280af22 1683 if (!PL_dbargs) {
71315bf2 1684 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1685 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1686 GvMULTI_on(tmpgv);
3ddcf04c 1687 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW
1688 }
1689
3280af22
NIS
1690 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1691 av_extend(PL_dbargs, AvFILLp(ary) + off);
1692 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1693 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1694 }
f3aa04c2
GS
1695 /* XXX only hints propagated via op_private are currently
1696 * visible (others are not easily accessible, since they
1697 * use the global PL_hints) */
623e6609 1698 PUSHs(sv_2mortal(newSViv(CopHINTS_get(cx->blk_oldcop))));
e476b1b5
GS
1699 {
1700 SV * mask ;
72dc9ed5 1701 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1702
ac27b0f5 1703 if (old_warnings == pWARN_NONE ||
114bafba 1704 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1705 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1706 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS
1707 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1708 /* Get the bit mask for $warnings::Bits{all}, because
1709 * it could have been extended by warnings::register */
1710 SV **bits_all;
0bd48802 1711 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1712 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS
1713 mask = newSVsv(*bits_all);
1714 }
1715 else {
1716 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1717 }
1718 }
e476b1b5 1719 else
72dc9ed5 1720 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
e476b1b5
GS
1721 PUSHs(sv_2mortal(mask));
1722 }
b3ca2e83
NC
1723
1724 PUSHs(cx->blk_oldcop->cop_hints ?
1725 sv_2mortal(newRV_noinc(
1726 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1727 cx->blk_oldcop->cop_hints)))
1728 : &PL_sv_undef);
a0d0e21e
LW
1729 RETURN;
1730}
1731
a0d0e21e
LW
1732PP(pp_reset)
1733{
97aff369 1734 dVAR;
39644a26 1735 dSP;
0bd48802 1736 const char * const tmps = (MAXARG < 1) ? "" : POPpconstx;
11faa288 1737 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1738 PUSHs(&PL_sv_yes);
a0d0e21e
LW
1739 RETURN;
1740}
1741
dd2155a4
DM
1742/* like pp_nextstate, but used instead when the debugger is active */
1743
a0d0e21e
LW
1744PP(pp_dbstate)
1745{
27da23d5 1746 dVAR;
533c011a 1747 PL_curcop = (COP*)PL_op;
a0d0e21e 1748 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1749 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW
1750 FREETMPS;
1751
5df8de69
DM
1752 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1753 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1754 {
39644a26 1755 dSP;
c09156bb 1756 register PERL_CONTEXT *cx;
f54cb97a 1757 const I32 gimme = G_ARRAY;
eb160463 1758 U8 hasargs;
0bd48802
AL
1759 GV * const gv = PL_DBgv;
1760 register CV * const cv = GvCV(gv);
a0d0e21e 1761
a0d0e21e 1762 if (!cv)
cea2e8a9 1763 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1764
aea4f609
DM
1765 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1766 /* don't do recursive DB::DB call */
a0d0e21e 1767 return NORMAL;
748a9306 1768
4633a7c4
LW
1769 ENTER;
1770 SAVETMPS;
1771
3280af22 1772 SAVEI32(PL_debug);
55497cff 1773 SAVESTACK_POS();
3280af22 1774 PL_debug = 0;
748a9306 1775 hasargs = 0;
924508f0 1776 SPAGAIN;
748a9306 1777
aed2304a 1778 if (CvISXSUB(cv)) {
c127bd3a
SF
1779 CvDEPTH(cv)++;
1780 PUSHMARK(SP);
1781 (void)(*CvXSUB(cv))(aTHX_ cv);
1782 CvDEPTH(cv)--;
1783 FREETMPS;
1784 LEAVE;
1785 return NORMAL;
1786 }
1787 else {
1788 PUSHBLOCK(cx, CXt_SUB, SP);
1789 PUSHSUB_DB(cx);
1790 cx->blk_sub.retop = PL_op->op_next;
1791 CvDEPTH(cv)++;
1792 SAVECOMPPAD();
1793 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1794 RETURNOP(CvSTART(cv));
1795 }
a0d0e21e
LW
1796 }
1797 else
1798 return NORMAL;
1799}
1800
a0d0e21e
LW
1801PP(pp_enteriter)
1802{
27da23d5 1803 dVAR; dSP; dMARK;
c09156bb 1804 register PERL_CONTEXT *cx;
f54cb97a 1805 const I32 gimme = GIMME_V;
a0d0e21e 1806 SV **svp;
0d863452 1807 U32 cxtype = CXt_LOOP | CXp_FOREACH;
7766f137
GS
1808#ifdef USE_ITHREADS
1809 void *iterdata;
1810#endif
a0d0e21e 1811
4633a7c4
LW
1812 ENTER;
1813 SAVETMPS;
1814
533c011a 1815 if (PL_op->op_targ) {
14f338dc
DM
1816 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1817 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1818 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1819 SVs_PADSTALE, SVs_PADSTALE);
1820 }
c3564e5c 1821#ifndef USE_ITHREADS
dd2155a4 1822 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
54b9620d 1823 SAVESPTR(*svp);
c3564e5c
GS
1824#else
1825 SAVEPADSV(PL_op->op_targ);
cbfa9890 1826 iterdata = INT2PTR(void*, PL_op->op_targ);
7766f137
GS
1827 cxtype |= CXp_PADVAR;
1828#endif
54b9620d
MB
1829 }
1830 else {
0bd48802 1831 GV * const gv = (GV*)POPs;
7766f137 1832 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1833 SAVEGENERICSV(*svp);
561b68a9 1834 *svp = newSV(0);
7766f137
GS
1835#ifdef USE_ITHREADS
1836 iterdata = (void*)gv;
1837#endif
54b9620d 1838 }
4633a7c4 1839
0d863452
RH
1840 if (PL_op->op_private & OPpITER_DEF)
1841 cxtype |= CXp_FOR_DEF;
1842
a0d0e21e
LW
1843 ENTER;
1844
7766f137
GS
1845 PUSHBLOCK(cx, cxtype, SP);
1846#ifdef USE_ITHREADS
1847 PUSHLOOP(cx, iterdata, MARK);
1848#else
a0d0e21e 1849 PUSHLOOP(cx, svp, MARK);
7766f137 1850#endif
533c011a 1851 if (PL_op->op_flags & OPf_STACKED) {
44a8e56a 1852 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
89ea2908
GA
1853 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1854 dPOPss;
0bd48802 1855 SV * const right = (SV*)cx->blk_loop.iterary;
984a4bea
RD
1856 SvGETMAGIC(sv);
1857 SvGETMAGIC(right);
4fe3f0fa
MHM
1858 if (RANGE_IS_NUMERIC(sv,right)) {
1859 if ((SvOK(sv) && SvNV(sv) < IV_MIN) ||
1860 (SvOK(right) && SvNV(right) >= IV_MAX))
076d9a11
MHM
1861 DIE(aTHX_ "Range iterator outside integer range");
1862 cx->blk_loop.iterix = SvIV(sv);
4fe3f0fa 1863 cx->blk_loop.itermax = SvIV(right);
d4665a05
DM
1864#ifdef DEBUGGING
1865 /* for correct -Dstv display */
1866 cx->blk_oldsp = sp - PL_stack_base;
1867#endif
89ea2908 1868 }
3f63a782 1869 else {
89ea2908 1870 cx->blk_loop.iterlval = newSVsv(sv);
13c5b33c 1871 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
10516c54 1872 (void) SvPV_nolen_const(right);
3f63a782 1873 }
89ea2908 1874 }
ef3e5ea9 1875 else if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1876 cx->blk_loop.itermax = 0;
1877 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary) + 1;
ef3e5ea9
NC
1878
1879 }
89ea2908 1880 }
4633a7c4 1881 else {
3280af22
NIS
1882 cx->blk_loop.iterary = PL_curstack;
1883 AvFILLp(PL_curstack) = SP - PL_stack_base;
ef3e5ea9 1884 if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM
1885 cx->blk_loop.itermax = MARK - PL_stack_base + 1;
1886 cx->blk_loop.iterix = cx->blk_oldsp + 1;
ef3e5ea9
NC
1887 }
1888 else {
1889 cx->blk_loop.iterix = MARK - PL_stack_base;
1890 }
4633a7c4 1891 }
a0d0e21e
LW
1892
1893 RETURN;
1894}
1895
1896PP(pp_enterloop)
1897{
27da23d5 1898 dVAR; dSP;
c09156bb 1899 register PERL_CONTEXT *cx;
f54cb97a 1900 const I32 gimme = GIMME_V;
a0d0e21e
LW
1901
1902 ENTER;
1903 SAVETMPS;
1904 ENTER;
1905
1906 PUSHBLOCK(cx, CXt_LOOP, SP);
1907 PUSHLOOP(cx, 0, SP);
1908
1909 RETURN;
1910}
1911
1912PP(pp_leaveloop)
1913{
27da23d5 1914 dVAR; dSP;
c09156bb 1915 register PERL_CONTEXT *cx;
a0d0e21e
LW
1916 I32 gimme;
1917 SV **newsp;
1918 PMOP *newpm;
1919 SV **mark;
1920
1921 POPBLOCK(cx,newpm);
3a1b2b9e 1922 assert(CxTYPE(cx) == CXt_LOOP);
4fdae800 1923 mark = newsp;
a8bba7fa 1924 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1925
a1f49e72 1926 TAINT_NOT;
54310121 1927 if (gimme == G_VOID)
bb263b4e 1928 /*EMPTY*/; /* do nothing */
54310121
PP
1929 else if (gimme == G_SCALAR) {
1930 if (mark < SP)
1931 *++newsp = sv_mortalcopy(*SP);
1932 else
3280af22 1933 *++newsp = &PL_sv_undef;
a0d0e21e
LW
1934 }
1935 else {
a1f49e72 1936 while (mark < SP) {
a0d0e21e 1937 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS
1938 TAINT_NOT; /* Each item is independent */
1939 }
a0d0e21e 1940 }
f86702cc
PP
1941 SP = newsp;
1942 PUTBACK;
1943
a8bba7fa 1944 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 1945 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 1946
a0d0e21e
LW
1947 LEAVE;
1948 LEAVE;
1949
f86702cc 1950 return NORMAL;
a0d0e21e
LW
1951}
1952
1953PP(pp_return)
1954{
27da23d5 1955 dVAR; dSP; dMARK;
c09156bb 1956 register PERL_CONTEXT *cx;
f86702cc 1957 bool popsub2 = FALSE;
b45de488 1958 bool clear_errsv = FALSE;
a0d0e21e
LW
1959 I32 gimme;
1960 SV **newsp;
1961 PMOP *newpm;
1962 I32 optype = 0;
b0d9ce38 1963 SV *sv;
f39bc417 1964 OP *retop;
a0d0e21e 1965
0bd48802
AL
1966 const I32 cxix = dopoptosub(cxstack_ix);
1967
9850bf21
RH
1968 if (cxix < 0) {
1969 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
1970 * sort block, which is a CXt_NULL
1971 * not a CXt_SUB */
1972 dounwind(0);
d7507f74
RH
1973 PL_stack_base[1] = *PL_stack_sp;
1974 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW
1975 return 0;
1976 }
9850bf21
RH
1977 else
1978 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 1979 }
a0d0e21e
LW
1980 if (cxix < cxstack_ix)
1981 dounwind(cxix);
1982
d7507f74
RH
1983 if (CxMULTICALL(&cxstack[cxix])) {
1984 gimme = cxstack[cxix].blk_gimme;
1985 if (gimme == G_VOID)
1986 PL_stack_sp = PL_stack_base;
1987 else if (gimme == G_SCALAR) {
1988 PL_stack_base[1] = *PL_stack_sp;
1989 PL_stack_sp = PL_stack_base + 1;
1990 }
9850bf21 1991 return 0;
d7507f74 1992 }
9850bf21 1993
a0d0e21e 1994 POPBLOCK(cx,newpm);
6b35e009 1995 switch (CxTYPE(cx)) {
a0d0e21e 1996 case CXt_SUB:
f86702cc 1997 popsub2 = TRUE;
f39bc417 1998 retop = cx->blk_sub.retop;
5dd42e15 1999 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW
2000 break;
2001 case CXt_EVAL:
b45de488
GS
2002 if (!(PL_in_eval & EVAL_KEEPERR))
2003 clear_errsv = TRUE;
a0d0e21e 2004 POPEVAL(cx);
f39bc417 2005 retop = cx->blk_eval.retop;
1d76a5c3
GS
2006 if (CxTRYBLOCK(cx))
2007 break;
067f92a0 2008 lex_end();
748a9306
LW
2009 if (optype == OP_REQUIRE &&
2010 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2011 {
54310121 2012 /* Unassume the success we assumed earlier. */
901017d6 2013 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2014 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
35c1215d 2015 DIE(aTHX_ "%"SVf" did not return a true value", nsv);
748a9306 2016 }
a0d0e21e 2017 break;
7766f137
GS
2018 case CXt_FORMAT:
2019 POPFORMAT(cx);
f39bc417 2020 retop = cx->blk_sub.retop;
7766f137 2021 break;
a0d0e21e 2022 default:
cea2e8a9 2023 DIE(aTHX_ "panic: return");
a0d0e21e
LW
2024 }
2025
a1f49e72 2026 TAINT_NOT;
a0d0e21e 2027 if (gimme == G_SCALAR) {
a29cdaf0
IZ
2028 if (MARK < SP) {
2029 if (popsub2) {
a8bba7fa 2030 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ
2031 if (SvTEMP(TOPs)) {
2032 *++newsp = SvREFCNT_inc(*SP);
2033 FREETMPS;
2034 sv_2mortal(*newsp);
959e3673
GS
2035 }
2036 else {
2037 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2038 FREETMPS;
959e3673
GS
2039 *++newsp = sv_mortalcopy(sv);
2040 SvREFCNT_dec(sv);
a29cdaf0 2041 }
959e3673
GS
2042 }
2043 else
a29cdaf0 2044 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS
2045 }
2046 else
a29cdaf0 2047 *++newsp = sv_mortalcopy(*SP);
959e3673
GS
2048 }
2049 else
3280af22 2050 *++newsp = &PL_sv_undef;
a0d0e21e 2051 }
54310121 2052 else if (gimme == G_ARRAY) {
a1f49e72 2053 while (++MARK <= SP) {
f86702cc
PP
2054 *++newsp = (popsub2 && SvTEMP(*MARK))
2055 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2056 TAINT_NOT; /* Each item is independent */
2057 }
a0d0e21e 2058 }
3280af22 2059 PL_stack_sp = newsp;
a0d0e21e 2060
5dd42e15 2061 LEAVE;
f86702cc
PP
2062 /* Stack values are safe: */
2063 if (popsub2) {
5dd42e15 2064 cxstack_ix--;
b0d9ce38 2065 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2066 }
b0d9ce38 2067 else
c445ea15 2068 sv = NULL;
3280af22 2069 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2070
b0d9ce38 2071 LEAVESUB(sv);
b45de488 2072 if (clear_errsv)
c69006e4 2073 sv_setpvn(ERRSV,"",0);
f39bc417 2074 return retop;
a0d0e21e
LW
2075}
2076
2077PP(pp_last)
2078{
27da23d5 2079 dVAR; dSP;
a0d0e21e 2080 I32 cxix;
c09156bb 2081 register PERL_CONTEXT *cx;
f86702cc 2082 I32 pop2 = 0;
a0d0e21e 2083 I32 gimme;
8772537c 2084 I32 optype;
a0d0e21e
LW
2085 OP *nextop;
2086 SV **newsp;
2087 PMOP *newpm;
a8bba7fa 2088 SV **mark;
c445ea15 2089 SV *sv = NULL;
9d4ba2ae 2090
a0d0e21e 2091
533c011a 2092 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2093 cxix = dopoptoloop(cxstack_ix);
2094 if (cxix < 0)
a651a37d 2095 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW
2096 }
2097 else {
2098 cxix = dopoptolabel(cPVOP->op_pv);
2099 if (cxix < 0)
cea2e8a9 2100 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW
2101 }
2102 if (cxix < cxstack_ix)
2103 dounwind(cxix);
2104
2105 POPBLOCK(cx,newpm);
5dd42e15 2106 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2107 mark = newsp;
6b35e009 2108 switch (CxTYPE(cx)) {
a0d0e21e 2109 case CXt_LOOP:
f86702cc 2110 pop2 = CXt_LOOP;
a8bba7fa
GS
2111 newsp = PL_stack_base + cx->blk_loop.resetsp;
2112 nextop = cx->blk_loop.last_op->op_next;
a0d0e21e 2113 break;
f86702cc 2114 case CXt_SUB:
f86702cc 2115 pop2 = CXt_SUB;
f39bc417 2116 nextop = cx->blk_sub.retop;
a0d0e21e 2117 break;
f86702cc
PP
2118 case CXt_EVAL:
2119 POPEVAL(cx);
f39bc417 2120 nextop = cx->blk_eval.retop;
a0d0e21e 2121 break;
7766f137
GS
2122 case CXt_FORMAT:
2123 POPFORMAT(cx);
f39bc417 2124 nextop = cx->blk_sub.retop;
7766f137 2125 break;
a0d0e21e 2126 default:
cea2e8a9 2127 DIE(aTHX_ "panic: last");
a0d0e21e
LW
2128 }
2129
a1f49e72 2130 TAINT_NOT;
a0d0e21e 2131 if (gimme == G_SCALAR) {
f86702cc
PP
2132 if (MARK < SP)
2133 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2134 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2135 else
3280af22 2136 *++newsp = &PL_sv_undef;
a0d0e21e 2137 }
54310121 2138 else if (gimme == G_ARRAY) {
a1f49e72 2139 while (++MARK <= SP) {
f86702cc
PP
2140 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2141 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS
2142 TAINT_NOT; /* Each item is independent */
2143 }
f86702cc
PP
2144 }
2145 SP = newsp;
2146 PUTBACK;
2147
5dd42e15
DM
2148 LEAVE;
2149 cxstack_ix--;
f86702cc
PP
2150 /* Stack values are safe: */
2151 switch (pop2) {
2152 case CXt_LOOP:
a8bba7fa 2153 POPLOOP(cx); /* release loop vars ... */
4fdae800 2154 LEAVE;
f86702cc
PP
2155 break;
2156 case CXt_SUB:
b0d9ce38 2157 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2158 break;
a0d0e21e 2159 }
3280af22 2160 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2161
b0d9ce38 2162 LEAVESUB(sv);
9d4ba2ae
AL
2163 PERL_UNUSED_VAR(optype);
2164 PERL_UNUSED_VAR(gimme);
f86702cc 2165 return nextop;
a0d0e21e
LW
2166}
2167
2168PP(pp_next)
2169{
27da23d5 2170 dVAR;
a0d0e21e 2171 I32 cxix;
c09156bb 2172 register PERL_CONTEXT *cx;
85538317 2173 I32 inner;
a0d0e21e 2174
533c011a 2175 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2176 cxix = dopoptoloop(cxstack_ix);
2177 if (cxix < 0)
a651a37d 2178 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW
2179 }
2180 else {
2181 cxix = dopoptolabel(cPVOP->op_pv);
2182 if (cxix < 0)
cea2e8a9 2183 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW
2184 }
2185 if (cxix < cxstack_ix)
2186 dounwind(cxix);
2187
85538317
GS
2188 /* clear off anything above the scope we're re-entering, but
2189 * save the rest until after a possible continue block */
2190 inner = PL_scopestack_ix;
1ba6ee2b 2191 TOPBLOCK(cx);
85538317
GS
2192 if (PL_scopestack_ix < inner)
2193 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2194 PL_curcop = cx->blk_oldcop;
1ba6ee2b 2195 return cx->blk_loop.next_op;
a0d0e21e
LW
2196}
2197
2198PP(pp_redo)
2199{
27da23d5 2200 dVAR;
a0d0e21e 2201 I32 cxix;
c09156bb 2202 register PERL_CONTEXT *cx;
a0d0e21e 2203 I32 oldsave;
a034e688 2204 OP* redo_op;
a0d0e21e 2205
533c011a 2206 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW
2207 cxix = dopoptoloop(cxstack_ix);
2208 if (cxix < 0)
a651a37d 2209 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW
2210 }
2211 else {
2212 cxix = dopoptolabel(cPVOP->op_pv);
2213 if (cxix < 0)
cea2e8a9 2214 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW
2215 }
2216 if (cxix < cxstack_ix)
2217 dounwind(cxix);
2218
a034e688
DM
2219 redo_op = cxstack[cxix].blk_loop.redo_op;
2220 if (redo_op->op_type == OP_ENTER) {
2221 /* pop one less context to avoid $x being freed in while (my $x..) */
2222 cxstack_ix++;
2223 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2224 redo_op = redo_op->op_next;
2225 }
2226
a0d0e21e 2227 TOPBLOCK(cx);
3280af22 2228 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2229 LEAVE_SCOPE(oldsave);
936c78b5 2230 FREETMPS;
3a1b2b9e 2231 PL_curcop = cx->blk_oldcop;
a034e688 2232 return redo_op;
a0d0e21e
LW
2233}
2234
0824fdcb 2235STATIC OP *
bfed75c6 2236S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2237{
97aff369 2238 dVAR;
a0d0e21e 2239 OP **ops = opstack;
bfed75c6 2240 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2241
fc36a67e 2242 if (ops >= oplimit)
cea2e8a9 2243 Perl_croak(aTHX_ too_deep);
11343788
MB
2244 if (o->op_type == OP_LEAVE ||
2245 o->op_type == OP_SCOPE ||
2246 o->op_type == OP_LEAVELOOP ||
33d34e4c 2247 o->op_type == OP_LEAVESUB ||
11343788 2248 o->op_type == OP_LEAVETRY)
fc36a67e 2249 {
5dc0d613 2250 *ops++ = cUNOPo->op_first;
fc36a67e 2251 if (ops >= oplimit)
cea2e8a9 2252 Perl_croak(aTHX_ too_deep);
fc36a67e 2253 }
c4aa4e48 2254 *ops = 0;
11343788 2255 if (o->op_flags & OPf_KIDS) {
aec46f14 2256 OP *kid;
a0d0e21e 2257 /* First try all the kids at this level, since that's likeliest. */
11343788 2258 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS
2259 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2260 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW
2261 return kid;
2262 }
11343788 2263 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2264 if (kid == PL_lastgotoprobe)
a0d0e21e 2265 continue;
ed8d0fe2
SM
2266 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2267 if (ops == opstack)
2268 *ops++ = kid;
2269 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2270 ops[-1]->op_type == OP_DBSTATE)
2271 ops[-1] = kid;
2272 else
2273 *ops++ = kid;
2274 }
155aba94 2275 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2276 return o;
a0d0e21e
LW
2277 }
2278 }
c4aa4e48 2279 *ops = 0;
a0d0e21e
LW
2280 return 0;
2281}
2282
a0d0e21e
LW
2283PP(pp_goto)
2284{
27da23d5 2285 dVAR; dSP;
cbbf8932 2286 OP *retop = NULL;
a0d0e21e 2287 I32 ix;
c09156bb 2288 register PERL_CONTEXT *cx;
fc36a67e
PP
2289#define GOTO_DEPTH 64
2290 OP *enterops[GOTO_DEPTH];
cbbf8932 2291 const char *label = NULL;
bfed75c6
AL
2292 const bool do_dump = (PL_op->op_type == OP_DUMP);
2293 static const char must_have_label[] = "goto must have label";
a0d0e21e 2294
533c011a 2295 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2296 SV * const sv = POPs;
a0d0e21e
LW
2297
2298 /* This egregious kludge implements goto &subroutine */
2299 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2300 I32 cxix;
c09156bb 2301 register PERL_CONTEXT *cx;
a0d0e21e
LW
2302 CV* cv = (CV*)SvRV(sv);
2303 SV** mark;
2304 I32 items = 0;
2305 I32 oldsave;
b1464ded 2306 bool reified = 0;
a0d0e21e 2307
e8f7dd13 2308 retry:
4aa0a1f7 2309 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2310 const GV * const gv = CvGV(cv);
e8f7dd13 2311 if (gv) {
7fc63493 2312 GV *autogv;
e8f7dd13
GS
2313 SV *tmpstr;
2314 /* autoloaded stub? */
2315 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2316 goto retry;
2317 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2318 GvNAMELEN(gv), FALSE);
2319 if (autogv && (cv = GvCV(autogv)))
2320 goto retry;
2321 tmpstr = sv_newmortal();
c445ea15 2322 gv_efullname3(tmpstr, gv, NULL);
35c1215d 2323 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",tmpstr);
4aa0a1f7 2324 }
cea2e8a9 2325 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD
2326 }
2327
a0d0e21e 2328 /* First do some returnish stuff. */
b37c2d43 2329 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2330 FREETMPS;
a0d0e21e
LW
2331 cxix = dopoptosub(cxstack_ix);
2332 if (cxix < 0)
cea2e8a9 2333 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW
2334 if (cxix < cxstack_ix)
2335 dounwind(cxix);
2336 TOPBLOCK(cx);
2d43a17f 2337 SPAGAIN;
564abe23 2338 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2339 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM
2340 if (CxREALEVAL(cx))
2341 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2342 else
2343 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2344 }
9850bf21
RH
2345 else if (CxMULTICALL(cx))
2346 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
d8b46c1b
GS
2347 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
2348 /* put @_ back onto stack */
a0d0e21e 2349 AV* av = cx->blk_sub.argarray;
bfed75c6 2350
93965878 2351 items = AvFILLp(av) + 1;
a45cdc79
DM
2352 EXTEND(SP, items+1); /* @_ could have been extended. */
2353 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS
2354 SvREFCNT_dec(GvAV(PL_defgv));
2355 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2356 CLEAR_ARGARRAY(av);
d8b46c1b 2357 /* abandon @_ if it got reified */
62b1ebc2 2358 if (AvREAL(av)) {
b1464ded
DM
2359 reified = 1;
2360 SvREFCNT_dec(av);
d8b46c1b
GS
2361 av = newAV();
2362 av_extend(av, items-1);
11ca45c0 2363 AvREIFY_only(av);
dd2155a4 2364 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2365 }
a0d0e21e 2366 }
aed2304a 2367 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2368 AV* const av = GvAV(PL_defgv);
1fa4e549 2369 items = AvFILLp(av) + 1;
a45cdc79
DM
2370 EXTEND(SP, items+1); /* @_ could have been extended. */
2371 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2372 }
a45cdc79
DM
2373 mark = SP;
2374 SP += items;
6b35e009 2375 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2376 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2377 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2378 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW
2379 LEAVE_SCOPE(oldsave);
2380
2381 /* Now do some callish stuff. */
2382 SAVETMPS;
5023d17a 2383 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2384 if (CvISXSUB(cv)) {
b37c2d43 2385 OP* const retop = cx->blk_sub.retop;
f73ef291
NC
2386 SV **newsp;
2387 I32 gimme;
b1464ded
DM
2388 if (reified) {
2389 I32 index;
2390 for (index=0; index<items; index++)
2391 sv_2mortal(SP[-index]);
2392 }
1fa4e549 2393
b37c2d43
AL
2394 /* XS subs don't have a CxSUB, so pop it */
2395 POPBLOCK(cx, PL_curpm);
2396 /* Push a mark for the start of arglist */
2397 PUSHMARK(mark);
2398 PUTBACK;
2399 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2400 LEAVE;
5eff7df7 2401 return retop;
a0d0e21e
LW
2402 }
2403 else {
b37c2d43 2404 AV* const padlist = CvPADLIST(cv);
6b35e009 2405 if (CxTYPE(cx) == CXt_EVAL) {
3280af22
NIS
2406 PL_in_eval = cx->blk_eval.old_in_eval;
2407 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22
RH
2408 cx->cx_type = CXt_SUB;
2409 cx->blk_sub.hasargs = 0;
2410 }
a0d0e21e 2411 cx->blk_sub.cv = cv;
1a5b3db4 2412 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2413
a0d0e21e
LW
2414 CvDEPTH(cv)++;
2415 if (CvDEPTH(cv) < 2)
b37c2d43 2416 SvREFCNT_inc_void_NN(cv);
dd2155a4 2417 else {
599cee73 2418 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
44a8e56a 2419 sub_crush_depth(cv);
26019298 2420 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2421 }
fd617465
DM
2422 SAVECOMPPAD();
2423 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
6d4ff0d2 2424 if (cx->blk_sub.hasargs)
6d4ff0d2 2425 {
b37c2d43 2426 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2427
3280af22 2428 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2429 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2430 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2431 cx->blk_sub.argarray = av;
a0d0e21e
LW
2432
2433 if (items >= AvMAX(av) + 1) {
b37c2d43 2434 SV **ary = AvALLOC(av);
a0d0e21e
LW
2435 if (AvARRAY(av) != ary) {
2436 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
f880fe2f 2437 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2438 }
2439 if (items >= AvMAX(av) + 1) {
2440 AvMAX(av) = items - 1;
2441 Renew(ary,items+1,SV*);
2442 AvALLOC(av) = ary;
f880fe2f 2443 SvPV_set(av, (char*)ary);
a0d0e21e
LW
2444 }
2445 }
a45cdc79 2446 ++mark;
a0d0e21e 2447 Copy(mark,AvARRAY(av),items,SV*);
93965878 2448 AvFILLp(av) = items - 1;
d8b46c1b 2449 assert(!AvREAL(av));
b1464ded
DM
2450 if (reified) {
2451 /* transfer 'ownership' of refcnts to new @_ */
2452 AvREAL_on(av);
2453 AvREIFY_off(av);
2454 }
a0d0e21e
LW
2455 while (items--) {
2456 if (*mark)
2457 SvTEMP_off(*mark);
2458 mark++;
2459 }
2460 }
491527d0 2461 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
44a8e56a
PP
2462 /*
2463 * We do not care about using sv to call CV;
2464 * it's for informational purposes only.
2465 */
890ce7af 2466 SV * const sv = GvSV(PL_DBsub);
f398eb67 2467 save_item(sv);
491527d0 2468 if (PERLDB_SUB_NN) {
890ce7af 2469 const int type = SvTYPE(sv);
f398eb67
NC
2470 if (type < SVt_PVIV && type != SVt_IV)
2471 sv_upgrade(sv, SVt_PVIV);
7619c85e 2472 (void)SvIOK_on(sv);
45977657 2473 SvIV_set(sv, PTR2IV(cv)); /* Do it the quickest way */
491527d0 2474 } else {
c445ea15 2475 gv_efullname3(sv, CvGV(cv), NULL);
491527d0 2476 }
b37c2d43
AL
2477 if (PERLDB_GOTO) {
2478 CV * const gotocv = get_cv("DB::goto", FALSE);
2479 if (gotocv) {
2480 PUSHMARK( PL_stack_sp );
2481 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2482 PL_stack_sp--;
2483 }
491527d0 2484 }
1ce6579f 2485 }
a0d0e21e
LW
2486 RETURNOP(CvSTART(cv));
2487 }
2488 }
1614b0e3 2489 else {
0510663f 2490 label = SvPV_nolen_const(sv);
1614b0e3 2491 if (!(do_dump || *label))
cea2e8a9 2492 DIE(aTHX_ must_have_label);
1614b0e3 2493 }
a0d0e21e 2494 }
533c011a 2495 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2496 if (! do_dump)
cea2e8a9 2497 DIE(aTHX_ must_have_label);
a0d0e21e
LW
2498 }
2499 else
2500 label = cPVOP->op_pv;
2501
2502 if (label && *label) {
cbbf8932 2503 OP *gotoprobe = NULL;
3b2447bc 2504 bool leaving_eval = FALSE;
33d34e4c 2505 bool in_block = FALSE;
cbbf8932 2506 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW
2507
2508 /* find label */
2509
d4c19fe8 2510 PL_lastgotoprobe = NULL;
a0d0e21e
LW
2511 *enterops = 0;
2512 for (ix = cxstack_ix; ix >= 0; ix--) {
2513 cx = &cxstack[ix];
6b35e009 2514 switch (CxTYPE(cx)) {
a0d0e21e 2515 case CXt_EVAL:
3b2447bc 2516 leaving_eval = TRUE;
971ecbe6 2517 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH
2518 gotoprobe = (last_eval_cx ?
2519 last_eval_cx->blk_eval.old_eval_root :
2520 PL_eval_root);
2521 last_eval_cx = cx;
9c5794fe
RH
2522 break;
2523 }
2524 /* else fall through */
a0d0e21e
LW
2525 case CXt_LOOP:
2526 gotoprobe = cx->blk_oldcop->op_sibling;
2527 break;
2528 case CXt_SUBST:
2529 continue;
2530 case CXt_BLOCK:
33d34e4c 2531 if (ix) {
a0d0e21e 2532 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE
2533 in_block = TRUE;
2534 } else
3280af22 2535 gotoprobe = PL_main_root;
a0d0e21e 2536 break;
b3933176 2537 case CXt_SUB:
9850bf21 2538 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS
2539 gotoprobe = CvROOT(cx->blk_sub.cv);
2540 break;
2541 }
2542 /* FALL THROUGH */
7766f137 2543 case CXt_FORMAT:
0a753a76 2544 case CXt_NULL:
a651a37d 2545 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW
2546 default:
2547 if (ix)
cea2e8a9 2548 DIE(aTHX_ "panic: goto");
3280af22 2549 gotoprobe = PL_main_root;
a0d0e21e
LW
2550 break;
2551 }
2b597662
GS
2552 if (gotoprobe) {
2553 retop = dofindlabel(gotoprobe, label,
2554 enterops, enterops + GOTO_DEPTH);
2555 if (retop)
2556 break;
2557 }
3280af22 2558 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW
2559 }
2560 if (!retop)
cea2e8a9 2561 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2562
3b2447bc
RH
2563 /* if we're leaving an eval, check before we pop any frames
2564 that we're not going to punt, otherwise the error
2565 won't be caught */
2566
2567 if (leaving_eval && *enterops && enterops[1]) {
2568 I32 i;
2569 for (i = 1; enterops[i]; i++)
2570 if (enterops[i]->op_type == OP_ENTERITER)
2571 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2572 }
2573
a0d0e21e
LW
2574 /* pop unwanted frames */
2575
2576 if (ix < cxstack_ix) {
2577 I32 oldsave;
2578
2579 if (ix < 0)
2580 ix = 0;
2581 dounwind(ix);
2582 TOPBLOCK(cx);
3280af22 2583 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW
2584 LEAVE_SCOPE(oldsave);
2585 }
2586
2587 /* push wanted frames */
2588
748a9306 2589 if (*enterops && enterops[1]) {
0bd48802 2590 OP * const oldop = PL_op;
33d34e4c
AE
2591 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2592 for (; enterops[ix]; ix++) {
533c011a 2593 PL_op = enterops[ix];
84902520
TB
2594 /* Eventually we may want to stack the needed arguments
2595 * for each op. For now, we punt on the hard ones. */
533c011a 2596 if (PL_op->op_type == OP_ENTERITER)
894356b3 2597 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2598 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2599 }
533c011a 2600 PL_op = oldop;
a0d0e21e
LW
2601 }
2602 }
2603
2604 if (do_dump) {
a5f75d66 2605#ifdef VMS
6b88bc9c 2606 if (!retop) retop = PL_main_start;
a5f75d66 2607#endif
3280af22
NIS
2608 PL_restartop = retop;
2609 PL_do_undump = TRUE;
a0d0e21e
LW
2610
2611 my_unexec();
2612
3280af22
NIS
2613 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2614 PL_do_undump = FALSE;
a0d0e21e
LW
2615 }
2616
2617 RETURNOP(retop);
2618}
2619
2620PP(pp_exit)
2621{
97aff369 2622 dVAR;
39644a26 2623 dSP;
a0d0e21e
LW
2624 I32 anum;
2625
2626 if (MAXARG < 1)
2627 anum = 0;
ff0cee69 2628 else {
a0d0e21e 2629 anum = SvIVx(POPs);
d98f61e7
GS
2630#ifdef VMS
2631 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2632 anum = 0;
96e176bf 2633 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP
2634#endif
2635 }
cc3604b1 2636 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC
2637#ifdef PERL_MAD
2638 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2639 if (anum || !(PL_minus_c && PL_madskills))
2640 my_exit(anum);
2641#else
a0d0e21e 2642 my_exit(anum);
81d86705 2643#endif
3280af22 2644 PUSHs(&PL_sv_undef);
a0d0e21e
LW
2645 RETURN;
2646}
2647
a0d0e21e
LW
2648/* Eval. */
2649
0824fdcb 2650STATIC void
cea2e8a9 2651S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2652{
504618e9 2653 const char *s = SvPVX_const(sv);
890ce7af 2654 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2655 I32 line = 1;
a0d0e21e
LW
2656
2657 while (s && s < send) {
f54cb97a 2658 const char *t;
561b68a9 2659 SV * const tmpstr = newSV(0);
a0d0e21e
LW
2660
2661 sv_upgrade(tmpstr, SVt_PVMG);
2662 t = strchr(s, '\n');
2663 if (t)
2664 t++;
2665 else
2666 t = send;
2667
2668 sv_setpvn(tmpstr, s, t - s);
2669 av_store(array, line++, tmpstr);
2670 s = t;
2671 }
2672}
2673
901017d6 2674STATIC void
14dd3ad8
GS
2675S_docatch_body(pTHX)
2676{
97aff369 2677 dVAR;
cea2e8a9 2678 CALLRUNOPS(aTHX);
901017d6 2679 return;
312caa8e
CS
2680}
2681
0824fdcb 2682STATIC OP *
cea2e8a9 2683S_docatch(pTHX_ OP *o)
1e422769 2684{
97aff369 2685 dVAR;
6224f72b 2686 int ret;
06b5626a 2687 OP * const oldop = PL_op;
db36c5a1 2688 dJMPENV;
1e422769 2689
1e422769 2690#ifdef DEBUGGING
54310121 2691 assert(CATCH_GET == TRUE);
1e422769 2692#endif
312caa8e 2693 PL_op = o;
8bffa5f8 2694
14dd3ad8 2695 JMPENV_PUSH(ret);
6224f72b 2696 switch (ret) {
312caa8e 2697 case 0:
abd70938
DM
2698 assert(cxstack_ix >= 0);
2699 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2700 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8
GS
2701 redo_body:
2702 docatch_body();
312caa8e
CS
2703 break;
2704 case 3:
8bffa5f8 2705 /* die caught by an inner eval - continue inner loop */
abd70938
DM
2706
2707 /* NB XXX we rely on the old popped CxEVAL still being at the top
2708 * of the stack; the way die_where() currently works, this
2709 * assumption is valid. In theory The cur_top_env value should be
2710 * returned in another global, the way retop (aka PL_restartop)
2711 * is. */
2712 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2713
2714 if (PL_restartop
2715 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2716 {
312caa8e
CS
2717 PL_op = PL_restartop;
2718 PL_restartop = 0;
2719 goto redo_body;
2720 }
2721 /* FALL THROUGH */
2722 default:
14dd3ad8 2723 JMPENV_POP;
533c011a 2724 PL_op = oldop;
6224f72b 2725 JMPENV_JUMP(ret);
1e422769 2726 /* NOTREACHED */
1e422769 2727 }
14dd3ad8 2728 JMPENV_POP;
533c011a 2729 PL_op = oldop;
5f66b61c 2730 return NULL;
1e422769
PP
2731}
2732
c277df42 2733OP *
bfed75c6 2734Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ
2735/* sv Text to convert to OP tree. */
2736/* startop op_free() this to undo. */
2737/* code Short string id of the caller. */
2738{
f7997f86 2739 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2740 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ
2741 PERL_CONTEXT *cx;
2742 SV **newsp;
b094c71d 2743 I32 gimme = G_VOID;
c277df42
IZ
2744 I32 optype;
2745 OP dummy;
155aba94 2746 OP *rop;
83ee9e09
GS
2747 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2748 char *tmpbuf = tbuf;
c277df42 2749 char *safestr;
a3985cdc 2750 int runtime;
601f1833 2751 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2752 STRLEN len;
c277df42
IZ
2753
2754 ENTER;
2755 lex_start(sv);
2756 SAVETMPS;
2757 /* switch to eval mode */
2758
923e4eb5 2759 if (IN_PERL_COMPILETIME) {
f4dd75d9 2760 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2761 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2762 }
83ee9e09 2763 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2764 SV * const sv = sv_newmortal();
83ee9e09
GS
2765 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2766 code, (unsigned long)++PL_evalseq,
2767 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2768 tmpbuf = SvPVX(sv);
fc009855 2769 len = SvCUR(sv);
83ee9e09
GS
2770 }
2771 else
fc009855
NC
2772 len = my_sprintf(tmpbuf, "_<(%.10s_eval %lu)", code,
2773 (unsigned long)++PL_evalseq);
f4dd75d9 2774 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2775 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2776 SAVECOPLINE(&PL_compiling);
57843af0 2777 CopLINE_set(&PL_compiling, 1);
c277df42
IZ
2778 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2779 deleting the eval's FILEGV from the stash before gv_check() runs
2780 (i.e. before run-time proper). To work around the coredump that
2781 ensues, we always turn GvMULTI_on for any globals that were
2782 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC
2783 safestr = savepvn(tmpbuf, len);
2784 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2785 SAVEHINTS();
d1ca3daa 2786#ifdef OP_IN_REGISTER
6b88bc9c 2787 PL_opsave = op;
d1ca3daa 2788#else
7766f137 2789 SAVEVPTR(PL_op);
d1ca3daa 2790#endif
c277df42 2791
a3985cdc 2792 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2793 runtime = IN_PERL_RUNTIME;
a3985cdc 2794 if (runtime)
d819b83a 2795 runcv = find_runcv(NULL);
a3985cdc 2796
533c011a 2797 PL_op = &dummy;
13b51b79 2798 PL_op->op_type = OP_ENTEREVAL;
533c011a 2799 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2800 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
a0714e2c 2801 PUSHEVAL(cx, 0, NULL);
a3985cdc
DM
2802
2803 if (runtime)
2804 rop = doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
2805 else
2806 rop = doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2807 POPBLOCK(cx,PL_curpm);
e84b9f1f 2808 POPEVAL(cx);
c277df42
IZ
2809
2810 (*startop)->op_type = OP_NULL;
22c35a8c 2811 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2812 lex_end();
f3548bdc 2813 /* XXX DAPM do this properly one year */
b37c2d43 2814 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2815 LEAVE;
923e4eb5 2816 if (IN_PERL_COMPILETIME)
623e6609 2817 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2818#ifdef OP_IN_REGISTER
6b88bc9c 2819 op = PL_opsave;
d1ca3daa 2820#endif
9d4ba2ae
AL
2821 PERL_UNUSED_VAR(newsp);
2822 PERL_UNUSED_VAR(optype);
2823
c277df42
IZ
2824 return rop;
2825}
2826
a3985cdc
DM
2827
2828/*
2829=for apidoc find_runcv
2830
2831Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM
2832If db_seqp is non_null, skip CVs that are in the DB package and populate
2833*db_seqp with the cop sequence number at the point that the DB:: code was
2834entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2835than in the scope of the debugger itself).
a3985cdc
DM
2836
2837=cut
2838*/
2839
2840CV*
d819b83a 2841Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2842{
97aff369 2843 dVAR;
a3985cdc 2844 PERL_SI *si;
a3985cdc 2845
d819b83a
DM
2846 if (db_seqp)
2847 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2848 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2849 I32 ix;
a3985cdc 2850 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2851 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2852 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2853 CV * const cv = cx->blk_sub.cv;
d819b83a
DM
2854 /* skip DB:: code */
2855 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2856 *db_seqp = cx->blk_oldcop->cop_seq;
2857 continue;
2858 }
2859 return cv;
2860 }
a3985cdc
DM
2861 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2862 return PL_compcv;
2863 }
2864 }
2865 return PL_main_cv;
2866}
2867
2868
2869/* Compile a require/do, an eval '', or a /(?{...})/.
2870 * In the last case, startop is non-null, and contains the address of
2871 * a pointer that should be set to the just-compiled code.
2872 * outside is the lexically enclosing CV (if any) that invoked us.
2873 */
2874
4d1ff10f 2875/* With USE_5005THREADS, eval_owner must be held on entry to doeval */
0824fdcb 2876STATIC OP *
a3985cdc 2877S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2878{
27da23d5 2879 dVAR; dSP;
46c461b5 2880 OP * const saveop = PL_op;
a0d0e21e 2881
6dc8a9e4
IZ
2882 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2883 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2884 : EVAL_INEVAL);
a0d0e21e 2885
1ce6579f
PP
2886 PUSHMARK(SP);
2887
3280af22 2888 SAVESPTR(PL_compcv);
561b68a9 2889 PL_compcv = (CV*)newSV(0);
3280af22 2890 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1aff0e91 2891 CvEVAL_on(PL_compcv);
2090ab20
JH
2892 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2893 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2894
a3985cdc 2895 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2896 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2897
dd2155a4 2898 /* set up a scratch pad */
a0d0e21e 2899
dd2155a4 2900 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
2c05e328 2901
07055b4c 2902
81d86705
NC
2903 if (!PL_madskills)
2904 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2905
a0d0e21e
LW
2906 /* make sure we compile in the right package */
2907
ed094faf 2908 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2909 SAVESPTR(PL_curstash);
ed094faf 2910 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2911 }
3280af22
NIS
2912 SAVESPTR(PL_beginav);
2913 PL_beginav = newAV();
2914 SAVEFREESV(PL_beginav);
24944567 2915 SAVEI32(PL_error_count);
a0d0e21e 2916
81d86705
NC
2917#ifdef PERL_MAD
2918 SAVEI32(PL_madskills);
2919 PL_madskills = 0;
2920#endif
2921
a0d0e21e
LW
2922 /* try to compile it */
2923
5f66b61c 2924 PL_eval_root = NULL;
3280af22
NIS
2925 PL_error_count = 0;
2926 PL_curcop = &PL_compiling;
fc15ae8f 2927 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2928 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2929 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2930 else
c69006e4 2931 sv_setpvn(ERRSV,"",0);
3280af22 2932 if (yyparse() || PL_error_count || !PL_eval_root) {
0c58d367 2933 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2934 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2935 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2936 const char *msg;
bfed75c6 2937
533c011a 2938 PL_op = saveop;
3280af22
NIS
2939 if (PL_eval_root) {
2940 op_free(PL_eval_root);
5f66b61c 2941 PL_eval_root = NULL;
a0d0e21e 2942 }
3280af22 2943 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2944 if (!startop) {
3280af22 2945 POPBLOCK(cx,PL_curpm);
c277df42 2946 POPEVAL(cx);
c277df42 2947 }
a0d0e21e
LW
2948 lex_end();
2949 LEAVE;
9d4ba2ae
AL
2950
2951 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 2952 if (optype == OP_REQUIRE) {
b464bac0 2953 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 2954 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 2955 &PL_sv_undef, 0);
5a844595
GS
2956 DIE(aTHX_ "%sCompilation failed in require",
2957 *msg ? msg : "Unknown error\n");
2958 }
2959 else if (startop) {
3280af22 2960 POPBLOCK(cx,PL_curpm);
c277df42 2961 POPEVAL(cx);
5a844595
GS
2962 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2963 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 2964 }
9d7f88dd 2965 else {
9d7f88dd
SR
2966 if (!*msg) {
2967 sv_setpv(ERRSV, "Compilation error");
2968 }
2969 }
9d4ba2ae 2970 PERL_UNUSED_VAR(newsp);
a0d0e21e
LW
2971 RETPUSHUNDEF;
2972 }
57843af0 2973 CopLINE_set(&PL_compiling, 0);
c277df42 2974 if (startop) {
3280af22 2975 *startop = PL_eval_root;
c277df42 2976 } else
3280af22 2977 SAVEFREEOP(PL_eval_root);
0c58d367
RGS
2978
2979 /* Set the context for this new optree.
2980 * If the last op is an OP_REQUIRE, force scalar context.
2981 * Otherwise, propagate the context from the eval(). */
2982 if (PL_eval_root->op_type == OP_LEAVEEVAL
2983 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
2984 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
2985 == OP_REQUIRE)
2986 scalar(PL_eval_root);
2987 else if (gimme & G_VOID)
3280af22 2988 scalarvoid(PL_eval_root);
54310121 2989 else if (gimme & G_ARRAY)
3280af22 2990 list(PL_eval_root);
a0d0e21e 2991 else
3280af22 2992 scalar(PL_eval_root);
a0d0e21e
LW
2993
2994 DEBUG_x(dump_eval());
2995
55497cff 2996 /* Register with debugger: */
84902520 2997 if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) {
890ce7af 2998 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP
2999 if (cv) {
3000 dSP;
924508f0 3001 PUSHMARK(SP);
cc49e20b 3002 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 3003 PUTBACK;
864dbfa3 3004 call_sv((SV*)cv, G_DISCARD);
55497cff
PP
3005 }
3006 }
3007
a0d0e21e
LW
3008 /* compiled okay, so do it */
3009
3280af22
NIS
3010 CvDEPTH(PL_compcv) = 1;
3011 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3012 PL_op = saveop; /* The caller may need it. */
6dc8a9e4 3013 PL_lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3014
3280af22 3015 RETURNOP(PL_eval_start);
a0d0e21e
LW
3016}
3017
a6c40364 3018STATIC PerlIO *
ce8abf5f
SP
3019S_check_type_and_open(pTHX_ const char *name, const char *mode)
3020{
3021 Stat_t st;
c445ea15 3022 const int st_rc = PerlLIO_stat(name, &st);
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;
c445ea15
AL
3070 SV *filter_state = NULL;
3071 SV *filter_sub = NULL;
3072 SV *hook_sv = NULL;
6ec9efec
JH
3073 SV *encoding;
3074 OP *op;
a0d0e21e
LW
3075
3076 sv = POPs;
d7aa5382
JP
3077 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
3078 if ( SvVOK(sv) && ckWARN(WARN_PORTABLE) ) /* require v5.6.1 */
9014280d 3079 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
e3407aba 3080 "v-string in use/require non-portable");
d7aa5382
JP
3081
3082 sv = new_version(sv);
3083 if (!sv_derived_from(PL_patchlevel, "version"))
2593c6c6 3084 upg_version(PL_patchlevel);
149c1637 3085 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
468aa647
RGS
3086 if ( vcmp(sv,PL_patchlevel) < 0 )
3087 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
3088 vnormal(sv), vnormal(PL_patchlevel));
3089 }
3090 else {
3091 if ( vcmp(sv,PL_patchlevel) > 0 )
3092 DIE(aTHX_ "Perl %"SVf" required--this is only %"SVf", stopped",
3093 vnormal(sv), vnormal(PL_patchlevel));
3094 }
d7aa5382 3095
4305d8ab 3096 RETPUSHYES;
a0d0e21e 3097 }
5c144d81 3098 name = SvPV_const(sv, len);
6132ea6c 3099 if (!(name && len > 0 && *name))
cea2e8a9 3100 DIE(aTHX_ "Null filename used");
4633a7c4 3101 TAINT_PROPER("require");
44f8325f 3102 if (PL_op->op_type == OP_REQUIRE) {
0bd48802 3103 SV * const * const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
44f8325f
AL
3104 if ( svp ) {
3105 if (*svp != &PL_sv_undef)
3106 RETPUSHYES;
3107 else
3108 DIE(aTHX_ "Compilation failed in require");
3109 }
4d8b06f1 3110 }
a0d0e21e
LW
3111
3112 /* prepare to compile file */
3113
be4b629d 3114 if (path_is_absolute(name)) {
46fc3d4c 3115 tryname = name;
7925835c 3116 tryrsfp = doopen_pm(name,PERL_SCRIPT_MODE);
bf4acbe4 3117 }
67627c52
JH
3118#ifdef MACOS_TRADITIONAL
3119 if (!tryrsfp) {
3120 char newname[256];
3121
3122 MacPerl_CanonDir(name, newname, 1);
3123 if (path_is_absolute(newname)) {
3124 tryname = newname;
7925835c 3125 tryrsfp = doopen_pm(newname,PERL_SCRIPT_MODE);
67627c52
JH
3126 }
3127 }
3128#endif
be4b629d 3129 if (!tryrsfp) {
44f8325f 3130 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3131 I32 i;
748a9306 3132#ifdef VMS
46fc3d4c 3133 char *unixname;
c445ea15 3134 if ((unixname = tounixspec(name, NULL)) != NULL)
46fc3d4c
PP
3135#endif
3136 {
561b68a9 3137 namesv = newSV(0);
46fc3d4c 3138 for (i = 0; i <= AvFILL(ar); i++) {
bbed91b5
KF
3139 SV *dirsv = *av_fetch(ar, i, TRUE);
3140
3141 if (SvROK(dirsv)) {
3142 int count;
3143 SV *loader = dirsv;
3144
e14e2dc8
NC
3145 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3146 && !sv_isobject(loader))
3147 {
bbed91b5
KF
3148 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3149 }
3150
b900a521 3151 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3152 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3153 tryname = SvPVX_const(namesv);
c445ea15 3154 tryrsfp = NULL;
bbed91b5
KF
3155
3156 ENTER;
3157 SAVETMPS;
3158 EXTEND(SP, 2);
3159
3160 PUSHMARK(SP);
3161 PUSHs(dirsv);
3162 PUSHs(sv);
3163 PUTBACK;
e982885c
NC
3164 if (sv_isobject(loader))
3165 count = call_method("INC", G_ARRAY);
3166 else
3167 count = call_sv(loader, G_ARRAY);
bbed91b5
KF
3168 SPAGAIN;
3169
3170 if (count > 0) {
3171 int i = 0;
3172 SV *arg;
3173
3174 SP -= count - 1;
3175 arg = SP[i++];
3176
3177 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3178 arg = SvRV(arg);
3179 }
3180
3181 if (SvTYPE(arg) == SVt_PVGV) {
3182 IO *io = GvIO((GV *)arg);
3183
3184 ++filter_has_file;
3185
3186 if (io) {
3187 tryrsfp = IoIFP(io);
0f7de14d
NC
3188 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3189 PerlIO_close(IoOFP(io));
bbed91b5 3190 }
0f7de14d
NC
3191 IoIFP(io) = NULL;
3192 IoOFP(io) = NULL;
bbed91b5
KF
3193 }
3194
3195 if (i < count) {
3196 arg = SP[i++];
3197 }
3198 }
3199
3200 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3201 filter_sub = arg;
b37c2d43 3202 SvREFCNT_inc_void_NN(filter_sub);
bbed91b5
KF
3203
3204 if (i < count) {
3205 filter_state = SP[i];
b37c2d43 3206 SvREFCNT_inc_simple_void(filter_state);
bbed91b5
KF
3207 }
3208
c445ea15 3209 if (!tryrsfp) {
b65b4fdf
NC
3210 tryrsfp = PerlIO_open(BIT_BUCKET,
3211 PERL_SCRIPT_MODE);
bbed91b5
KF
3212 }
3213 }
1d06aecd 3214 SP--;
bbed91b5
KF
3215 }
3216
3217 PUTBACK;
3218 FREETMPS;
3219 LEAVE;
3220
3221 if (tryrsfp) {
89ccab8c 3222 hook_sv = dirsv;
bbed91b5
KF
3223 break;
3224 }
3225
3226 filter_has_file = 0;
bbed91b5
KF
3227 if (filter_state) {
3228 SvREFCNT_dec(filter_state);
c445ea15 3229 filter_state = NULL;
bbed91b5
KF
3230 }
3231 if (filter_sub) {
3232 SvREFCNT_dec(filter_sub);
c445ea15 3233 filter_sub = NULL;
bbed91b5
KF
3234 }
3235 }
3236 else {
be4b629d
CN
3237 if (!path_is_absolute(name)
3238#ifdef MACOS_TRADITIONAL
3239 /* We consider paths of the form :a:b ambiguous and interpret them first
3240 as global then as local
3241 */
3242 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3243#endif
3244 ) {
0510663f 3245 const char *dir = SvPVx_nolen_const(dirsv);
bf4acbe4 3246#ifdef MACOS_TRADITIONAL
67627c52
JH
3247 char buf1[256];
3248 char buf2[256];
3249
3250 MacPerl_CanonDir(name, buf2, 1);
3251 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3252#else
27da23d5 3253# ifdef VMS
bbed91b5 3254 char *unixdir;
c445ea15 3255 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF
3256 continue;
3257 sv_setpv(namesv, unixdir);
3258 sv_catpv(namesv, unixname);
27da23d5 3259# else
a0fd4948 3260# ifdef __SYMBIAN32__
27da23d5
JH
3261 if (PL_origfilename[0] &&
3262 PL_origfilename[1] == ':' &&
3263 !(dir[0] && dir[1] == ':'))
3264 Perl_sv_setpvf(aTHX_ namesv,
3265 "%c:%s\\%s",
3266 PL_origfilename[0],
3267 dir, name);
3268 else
3269 Perl_sv_setpvf(aTHX_ namesv,
3270 "%s\\%s",
3271 dir, name);
3272# else
bbed91b5 3273 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
27da23d5
JH
3274# endif
3275# endif
bf4acbe4 3276#endif
bbed91b5 3277 TAINT_PROPER("require");
349d4f2f 3278 tryname = SvPVX_const(namesv);
7925835c 3279 tryrsfp = doopen_pm(tryname, PERL_SCRIPT_MODE);
bbed91b5
KF
3280 if (tryrsfp) {
3281 if (tryname[0] == '.' && tryname[1] == '/')
3282 tryname += 2;
3283 break;
3284 }
be4b629d 3285 }
46fc3d4c 3286 }
a0d0e21e
LW
3287 }
3288 }
3289 }
f4dd75d9 3290 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3291 CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
46fc3d4c 3292 SvREFCNT_dec(namesv);
a0d0e21e 3293 if (!tryrsfp) {
533c011a 3294 if (PL_op->op_type == OP_REQUIRE) {
5c144d81 3295 const char *msgstr = name;
e31de809 3296 if(errno == EMFILE) {
b9b739dc
NC
3297 SV * const msg
3298 = sv_2mortal(Perl_newSVpvf(aTHX_ "%s: %s", msgstr,
3299 Strerror(errno)));
349d4f2f 3300 msgstr = SvPV_nolen_const(msg);
e31de809
SP
3301 } else {
3302 if (namesv) { /* did we lookup @INC? */
44f8325f 3303 AV * const ar = GvAVn(PL_incgv);
e31de809 3304 I32 i;
b8f04b1b
NC
3305 SV * const msg = sv_2mortal(Perl_newSVpvf(aTHX_
3306 "%s in @INC%s%s (@INC contains:",
3307 msgstr,
3308 (instr(msgstr, ".h ")
3309 ? " (change .h to .ph maybe?)" : ""),
3310 (instr(msgstr, ".ph ")
3311 ? " (did you run h2ph?)" : "")
3312 ));
3313
e31de809 3314 for (i = 0; i <= AvFILL(ar); i++) {
396482e1 3315 sv_catpvs(msg, " ");
b8f04b1b 3316 sv_catsv(msg, *av_fetch(ar, i, TRUE));
e31de809 3317 }
396482e1 3318 sv_catpvs(msg, ")");
e31de809
SP
3319 msgstr = SvPV_nolen_const(msg);
3320 }
2683423c 3321 }
ea071790 3322 DIE(aTHX_ "Can't locate %s", msgstr);
a0d0e21e
LW
3323 }
3324
3325 RETPUSHUNDEF;
3326 }
d8bfb8bd 3327 else
93189314 3328 SETERRNO(0, SS_NORMAL);
a0d0e21e
LW
3329
3330 /* Assume success here to prevent recursive requirement. */
238d24b4 3331 /* name is never assigned to again, so len is still strlen(name) */
d3a4e64e 3332 /* Check whether a hook in @INC has already filled %INC */
44f8325f
AL
3333 if (!hook_sv) {
3334 (void)hv_store(GvHVn(PL_incgv), name, len, newSVpv(CopFILE(&PL_compiling),0),0);
3335 } else {
3336 SV** const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3337 if (!svp)
b37c2d43 3338 (void)hv_store(GvHVn(PL_incgv), name, len, SvREFCNT_inc_simple(hook_sv), 0 );
d3a4e64e 3339 }
a0d0e21e
LW
3340
3341 ENTER;
3342 SAVETMPS;
396482e1 3343 lex_start(sv_2mortal(newSVpvs("")));
b9d12d37 3344 SAVEGENERICSV(PL_rsfp_filters);
7d49f689 3345 PL_rsfp_filters = NULL;
e50aee73 3346
3280af22 3347 PL_rsfp = tryrsfp;
b3ac6de7 3348 SAVEHINTS();
3280af22 3349 PL_hints = 0;
68da3b2f 3350 SAVECOMPILEWARNINGS();
0453d815 3351 if (PL_dowarn & G_WARN_ALL_ON)
d3a7d8c7 3352 PL_compiling.cop_warnings = pWARN_ALL ;
0453d815 3353 else if (PL_dowarn & G_WARN_ALL_OFF)
d3a7d8c7 3354 PL_compiling.cop_warnings = pWARN_NONE ;
72dc9ed5
NC
3355 else if (PL_taint_warn) {
3356 PL_compiling.cop_warnings
8ee4cf24 3357 = Perl_new_warnings_bitfield(aTHX_ NULL, WARN_TAINTstring, WARNsize);
72dc9ed5 3358 }
ac27b0f5 3359 else
d3a7d8c7 3360 PL_compiling.cop_warnings = pWARN_STD ;
ac27b0f5 3361 SAVESPTR(PL_compiling.cop_io);
c445ea15 3362 PL_compiling.cop_io = NULL;
a0d0e21e 3363
0f7de14d 3364 if (filter_sub) {
c445ea15 3365 SV * const datasv = filter_add(S_run_user_filter, NULL);
bbed91b5 3366 IoLINES(datasv) = filter_has_file;
bbed91b5
KF
3367 IoTOP_GV(datasv) = (GV *)filter_state;
3368 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
3369 }
3370
3371 /* switch to eval mode */
a0d0e21e 3372 PUSHBLOCK(cx, CXt_EVAL, SP);
a0714e2c 3373 PUSHEVAL(cx, name, NULL);
f39bc417 3374 cx->blk_eval.retop = PL_op->op_next;
a0d0e21e 3375
57843af0
GS
3376 SAVECOPLINE(&PL_compiling);
3377 CopLINE_set(&PL_compiling, 0);
a0d0e21e
LW
3378
3379 PUTBACK;
6ec9efec
JH
3380
3381 /* Store and reset encoding. */
3382 encoding = PL_encoding;
c445ea15 3383 PL_encoding = NULL;
6ec9efec 3384
601f1833 3385 op = DOCATCH(doeval(gimme, NULL, NULL, PL_curcop->cop_seq));
bfed75c6 3386
6ec9efec
JH
3387 /* Restore encoding. */
3388 PL_encoding = encoding;
3389
3390 return op;
a0d0e21e
LW
3391}
3392
a0d0e21e
LW
3393PP(pp_entereval)
3394{
27da23d5 3395 dVAR; dSP;
c09156bb 3396 register PERL_CONTEXT *cx;
0d863452 3397 SV *sv;
890ce7af
AL
3398 const I32 gimme = GIMME_V;
3399 const I32 was = PL_sub_generation;
83ee9e09
GS
3400 char tbuf[TYPE_DIGITS(long) + 12];
3401 char *tmpbuf = tbuf;
fc36a67e 3402 char *safestr;
a0d0e21e 3403 STRLEN len;
55497cff 3404 OP *ret;
a3985cdc 3405 CV* runcv;
d819b83a 3406 U32 seq;
c445ea15 3407 HV *saved_hh = NULL;
0d863452
RH
3408
3409 if (PL_op->op_private & OPpEVAL_HAS_HH) {
3410 saved_hh = (HV*) SvREFCNT_inc(POPs);
3411 }
3412 sv = POPs;
a0d0e21e 3413
f7997f86 3414 if (!SvPV_nolen_const(sv))
a0d0e21e 3415 RETPUSHUNDEF;
748a9306 3416 TAINT_PROPER("eval");
a0d0e21e
LW
3417
3418 ENTER;
a0d0e21e 3419 lex_start(sv);