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Properly handle the differences in hints in the optree with/without
[perl5.git] / pp_ctl.c
CommitLineData
a0d0e21e
LW		 1/* pp_ctl.c
2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 by Larry Wall and others
a0d0e21e
LW		 5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
9 */
10
11/*
12 * Now far ahead the Road has gone,
13 * And I must follow, if I can,
14 * Pursuing it with eager feet,
15 * Until it joins some larger way
16 * Where many paths and errands meet.
17 * And whither then? I cannot say.
18 */
19
166f8a29
DM		 20/* This file contains control-oriented pp ("push/pop") functions that
21 * execute the opcodes that make up a perl program. A typical pp function
22 * expects to find its arguments on the stack, and usually pushes its
23 * results onto the stack, hence the 'pp' terminology. Each OP structure
24 * contains a pointer to the relevant pp_foo() function.
25 *
26 * Control-oriented means things like pp_enteriter() and pp_next(), which
27 * alter the flow of control of the program.
28 */
29
30
a0d0e21e 31#include "EXTERN.h"
864dbfa3 32#define PERL_IN_PP_CTL_C
a0d0e21e
LW		 33#include "perl.h"
34
35#ifndef WORD_ALIGN
dea28490 36#define WORD_ALIGN sizeof(U32)
a0d0e21e
LW		 37#endif
38
54310121 39#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 40
a0d0e21e
LW		 41PP(pp_wantarray)
42{
97aff369 43 dVAR;
39644a26 44 dSP;
a0d0e21e
LW		 45 I32 cxix;
46 EXTEND(SP, 1);
47
48 cxix = dopoptosub(cxstack_ix);
49 if (cxix < 0)
50 RETPUSHUNDEF;
51
54310121
PP		 52 switch (cxstack[cxix].blk_gimme) {
53 case G_ARRAY:
a0d0e21e 54 RETPUSHYES;
54310121 55 case G_SCALAR:
a0d0e21e 56 RETPUSHNO;
54310121
PP		 57 default:
58 RETPUSHUNDEF;
59 }
a0d0e21e
LW		 60}
61
2cd61cdb
IZ		 62PP(pp_regcreset)
63{
97aff369 64 dVAR;
2cd61cdb
IZ		 65 /* XXXX Should store the old value to allow for tie/overload - and
66 restore in regcomp, where marked with XXXX. */
3280af22 67 PL_reginterp_cnt = 0;
0b4182de 68 TAINT_NOT;
2cd61cdb
IZ		 69 return NORMAL;
70}
71
b3eb6a9b
GS		 72PP(pp_regcomp)
73{
97aff369 74 dVAR;
39644a26 75 dSP;
a0d0e21e 76 register PMOP *pm = (PMOP*)cLOGOP->op_other;
a0d0e21e 77 SV *tmpstr;
4608196e 78 MAGIC *mg = NULL;
bfed75c6 79
4b5a0d1c 80 /* prevent recompiling under /o and ithreads. */
3db8f154 81#if defined(USE_ITHREADS)
131b3ad0
DM		 82 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
83 if (PL_op->op_flags & OPf_STACKED) {
84 dMARK;
85 SP = MARK;
86 }
87 else
88 (void)POPs;
89 RETURN;
90 }
513629ba 91#endif
131b3ad0
DM		 92 if (PL_op->op_flags & OPf_STACKED) {
93 /* multiple args; concatentate them */
94 dMARK; dORIGMARK;
95 tmpstr = PAD_SV(ARGTARG);
96 sv_setpvn(tmpstr, "", 0);
97 while (++MARK <= SP) {
98 if (PL_amagic_generation) {
99 SV *sv;
100 if ((SvAMAGIC(tmpstr) || SvAMAGIC(*MARK)) &&
101 (sv = amagic_call(tmpstr, *MARK, concat_amg, AMGf_assign)))
102 {
103 sv_setsv(tmpstr, sv);
104 continue;
105 }
106 }
107 sv_catsv(tmpstr, *MARK);
108 }
109 SvSETMAGIC(tmpstr);
110 SP = ORIGMARK;
111 }
112 else
113 tmpstr = POPs;
513629ba 114
b3eb6a9b 115 if (SvROK(tmpstr)) {
d8f6592e 116 SV * const sv = SvRV(tmpstr);
c277df42 117 if(SvMAGICAL(sv))
14befaf4 118 mg = mg_find(sv, PERL_MAGIC_qr);
c277df42 119 }
b3eb6a9b 120 if (mg) {
44f8325f 121 regexp * const re = (regexp *)mg->mg_obj;
aaa362c4
RS		 122 ReREFCNT_dec(PM_GETRE(pm));
123 PM_SETRE(pm, ReREFCNT_inc(re));
c277df42
IZ		 124 }
125 else {
e62f0680
NC		 126 STRLEN len;
127 const char *t = SvPV_const(tmpstr, len);
d8f6592e 128 regexp * const re = PM_GETRE(pm);
c277df42 129
20408e3c 130 /* Check against the last compiled regexp. */
d8f6592e
AL		 131 if (!re || !re->precomp || re->prelen != (I32)len ||
132 memNE(re->precomp, t, len))
85aff577 133 {
664e119d
RGS		 134 const regexp_engine *eng = re ? re->engine : NULL;
135
d8f6592e
AL		 136 if (re) {
137 ReREFCNT_dec(re);
4608196e 138 PM_SETRE(pm, NULL); /* crucial if regcomp aborts */
1e2e3d02
YO		 139 } else if (PL_curcop->cop_hints_hash) {
140 SV *ptr = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, 0,
141 "regcomp", 7, 0, 0);
142 if (ptr && SvIOK(ptr) && SvIV(ptr))
143 eng = INT2PTR(regexp_engine*,SvIV(ptr));
c277df42 144 }
664e119d 145
533c011a 146 if (PL_op->op_flags & OPf_SPECIAL)
3280af22 147 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
a0d0e21e 148
c277df42 149 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
84e09d5e
JH		 150 if (DO_UTF8(tmpstr))
151 pm->op_pmdynflags |= PMdf_DYN_UTF8;
152 else {
153 pm->op_pmdynflags &= ~PMdf_DYN_UTF8;
154 if (pm->op_pmdynflags & PMdf_UTF8)
155 t = (char*)bytes_to_utf8((U8*)t, &len);
156 }
1e2e3d02
YO		 157 if (eng)
158 PM_SETRE(pm, CALLREGCOMP_ENG(eng,(char *)t, (char *)t + len, pm));
159 else
160 PM_SETRE(pm, CALLREGCOMP((char *)t, (char *)t + len, pm));
161
84e09d5e
JH		 162 if (!DO_UTF8(tmpstr) && (pm->op_pmdynflags & PMdf_UTF8))
163 Safefree(t);
f86aaa29 164 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
2cd61cdb 165 inside tie/overload accessors. */
c277df42 166 }
4633a7c4 167 }
a0d0e21e 168
72311751 169#ifndef INCOMPLETE_TAINTS
3280af22
NIS		 170 if (PL_tainting) {
171 if (PL_tainted)
72311751
GS		 172 pm->op_pmdynflags |= PMdf_TAINTED;
173 else
174 pm->op_pmdynflags &= ~PMdf_TAINTED;
175 }
176#endif
177
aaa362c4 178 if (!PM_GETRE(pm)->prelen && PL_curpm)
3280af22 179 pm = PL_curpm;
e357fc67 180 else if (PM_GETRE(pm)->extflags & RXf_WHITE)
17cbf7cc 181 pm->op_pmflags |= PMf_WHITE;
16bdb4ac 182 else
17cbf7cc 183 pm->op_pmflags &= ~PMf_WHITE;
a0d0e21e 184
2360cd68 185 /* XXX runtime compiled output needs to move to the pad */
a0d0e21e 186 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 187 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
3db8f154 188#if !defined(USE_ITHREADS)
2360cd68 189 /* XXX can't change the optree at runtime either */
533c011a 190 cLOGOP->op_first->op_next = PL_op->op_next;
2360cd68 191#endif
a0d0e21e
LW		 192 }
193 RETURN;
194}
195
196PP(pp_substcont)
197{
97aff369 198 dVAR;
39644a26 199 dSP;
c09156bb 200 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL		 201 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
202 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW		 203 register char *s = cx->sb_s;
204 register char *m = cx->sb_m;
205 char *orig = cx->sb_orig;
901017d6 206 register REGEXP * const rx = cx->sb_rx;
c445ea15 207 SV *nsv = NULL;
988e6e7e
AE		 208 REGEXP *old = PM_GETRE(pm);
209 if(old != rx) {
bfed75c6 210 if(old)
988e6e7e 211 ReREFCNT_dec(old);
e22ae1e2 212 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB		 213 }
214
d9f97599 215 rxres_restore(&cx->sb_rxres, rx);
01b35787 216 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 217
a0d0e21e 218 if (cx->sb_iters++) {
a3b680e6 219 const I32 saviters = cx->sb_iters;
a0d0e21e 220 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 221 DIE(aTHX_ "Substitution loop");
a0d0e21e 222
48c036b1
GS		 223 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
224 cx->sb_rxtainted |= 2;
a0d0e21e 225 sv_catsv(dstr, POPs);
8ff629d9 226 FREETMPS; /* Prevent excess tmp stack */
a0d0e21e
LW		 227
228 /* Are we done */
f9f4320a 229 if (cx->sb_once || !CALLREGEXEC(rx, s, cx->sb_strend, orig,
9661b544 230 s == m, cx->sb_targ, NULL,
22e551b9 231 ((cx->sb_rflags & REXEC_COPY_STR)
cf93c79d
IZ		 232 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
233 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 234 {
823a54a3 235 SV * const targ = cx->sb_targ;
748a9306 236
078c425b
JH		 237 assert(cx->sb_strend >= s);
238 if(cx->sb_strend > s) {
239 if (DO_UTF8(dstr) && !SvUTF8(targ))
240 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
241 else
242 sv_catpvn(dstr, s, cx->sb_strend - s);
243 }
48c036b1 244 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
9212bbba 245
f8c7b90f 246#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 247 if (SvIsCOW(targ)) {
248 sv_force_normal_flags(targ, SV_COW_DROP_PV);
249 } else
250#endif
251 {
8bd4d4c5 252 SvPV_free(targ);
ed252734 253 }
f880fe2f 254 SvPV_set(targ, SvPVX(dstr));
748a9306
LW		 255 SvCUR_set(targ, SvCUR(dstr));
256 SvLEN_set(targ, SvLEN(dstr));
1aa99e6b
IH		 257 if (DO_UTF8(dstr))
258 SvUTF8_on(targ);
6136c704 259 SvPV_set(dstr, NULL);
48c036b1
GS		 260
261 TAINT_IF(cx->sb_rxtainted & 1);
22e13caa 262 PUSHs(sv_2mortal(newSViv(saviters - 1)));
48c036b1 263
ffc61ed2 264 (void)SvPOK_only_UTF8(targ);
48c036b1 265 TAINT_IF(cx->sb_rxtainted);
a0d0e21e 266 SvSETMAGIC(targ);
9212bbba 267 SvTAINT(targ);
5cd24f17 268
4633a7c4 269 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW		 270 POPSUBST(cx);
271 RETURNOP(pm->op_next);
272 }
8e5e9ebe 273 cx->sb_iters = saviters;
a0d0e21e 274 }
cf93c79d 275 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
a0d0e21e
LW		 276 m = s;
277 s = orig;
cf93c79d 278 cx->sb_orig = orig = rx->subbeg;
a0d0e21e
LW		 279 s = orig + (m - s);
280 cx->sb_strend = s + (cx->sb_strend - m);
281 }
cf93c79d 282 cx->sb_m = m = rx->startp[0] + orig;
db79b45b 283 if (m > s) {
bfed75c6 284 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH		 285 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
286 else
287 sv_catpvn(dstr, s, m-s);
288 }
cf93c79d 289 cx->sb_s = rx->endp[0] + orig;
084916e3 290 { /* Update the pos() information. */
44f8325f 291 SV * const sv = cx->sb_targ;
084916e3
JH		 292 MAGIC *mg;
293 I32 i;
294 if (SvTYPE(sv) < SVt_PVMG)
862a34c6 295 SvUPGRADE(sv, SVt_PVMG);
14befaf4 296 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 297#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 298 if (SvIsCOW(sv))
d83f0a82
NC		 299 sv_force_normal_flags(sv, 0);
300#endif
301 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
302 NULL, 0);
084916e3
JH		 303 }
304 i = m - orig;
305 if (DO_UTF8(sv))
306 sv_pos_b2u(sv, &i);
307 mg->mg_len = i;
308 }
988e6e7e 309 if (old != rx)
454f1e26 310 (void)ReREFCNT_inc(rx);
d9f97599
GS		 311 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
312 rxres_save(&cx->sb_rxres, rx);
a0d0e21e
LW		 313 RETURNOP(pm->op_pmreplstart);
314}
315
c90c0ff4 316void
864dbfa3 317Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP		 318{
319 UV *p = (UV*)*rsp;
320 U32 i;
96a5add6 321 PERL_UNUSED_CONTEXT;
c90c0ff4 322
d9f97599 323 if (!p || p[1] < rx->nparens) {
f8c7b90f 324#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 325 i = 7 + rx->nparens * 2;
326#else
d9f97599 327 i = 6 + rx->nparens * 2;
ed252734 328#endif
c90c0ff4 329 if (!p)
a02a5408 330 Newx(p, i, UV);
c90c0ff4
PP		 331 else
332 Renew(p, i, UV);
333 *rsp = (void*)p;
334 }
335
c445ea15 336 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? rx->subbeg : NULL);
cf93c79d 337 RX_MATCH_COPIED_off(rx);
c90c0ff4 338
f8c7b90f 339#ifdef PERL_OLD_COPY_ON_WRITE
ed252734 340 *p++ = PTR2UV(rx->saved_copy);
c445ea15 341 rx->saved_copy = NULL;
ed252734
NC		 342#endif
343
d9f97599 344 *p++ = rx->nparens;
c90c0ff4 345
56431972 346 *p++ = PTR2UV(rx->subbeg);
cf93c79d 347 *p++ = (UV)rx->sublen;
d9f97599
GS		 348 for (i = 0; i <= rx->nparens; ++i) {
349 *p++ = (UV)rx->startp[i];
350 *p++ = (UV)rx->endp[i];
c90c0ff4
PP		 351 }
352}
353
354void
864dbfa3 355Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4
PP		 356{
357 UV *p = (UV*)*rsp;
358 U32 i;
96a5add6 359 PERL_UNUSED_CONTEXT;
c90c0ff4 360
ed252734 361 RX_MATCH_COPY_FREE(rx);
cf93c79d 362 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4
PP		 363 *p++ = 0;
364
f8c7b90f 365#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 366 if (rx->saved_copy)
367 SvREFCNT_dec (rx->saved_copy);
368 rx->saved_copy = INT2PTR(SV*,*p);
369 *p++ = 0;
370#endif
371
d9f97599 372 rx->nparens = *p++;
c90c0ff4 373
56431972 374 rx->subbeg = INT2PTR(char*,*p++);
cf93c79d 375 rx->sublen = (I32)(*p++);
d9f97599 376 for (i = 0; i <= rx->nparens; ++i) {
cf93c79d
IZ		 377 rx->startp[i] = (I32)(*p++);
378 rx->endp[i] = (I32)(*p++);
c90c0ff4
PP		 379 }
380}
381
382void
864dbfa3 383Perl_rxres_free(pTHX_ void **rsp)
c90c0ff4 384{
44f8325f 385 UV * const p = (UV*)*rsp;
96a5add6 386 PERL_UNUSED_CONTEXT;
c90c0ff4
PP		 387
388 if (p) {
94010e71
NC		 389#ifdef PERL_POISON
390 void *tmp = INT2PTR(char*,*p);
391 Safefree(tmp);
392 if (*p)
7e337ee0 393 PoisonFree(*p, 1, sizeof(*p));
94010e71 394#else
56431972 395 Safefree(INT2PTR(char*,*p));
94010e71 396#endif
f8c7b90f 397#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 398 if (p[1]) {
399 SvREFCNT_dec (INT2PTR(SV*,p[1]));
400 }
401#endif
c90c0ff4 402 Safefree(p);
4608196e 403 *rsp = NULL;
c90c0ff4
PP		 404 }
405}
406
a0d0e21e
LW		 407PP(pp_formline)
408{
97aff369 409 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 410 register SV * const tmpForm = *++MARK;
dea28490 411 register U32 *fpc;
a0d0e21e 412 register char *t;
245d4a47 413 const char *f;
a0d0e21e 414 register I32 arg;
c445ea15
AL		 415 register SV *sv = NULL;
416 const char *item = NULL;
9c5ffd7c
JH		 417 I32 itemsize = 0;
418 I32 fieldsize = 0;
a0d0e21e 419 I32 lines = 0;
c445ea15
AL		 420 bool chopspace = (strchr(PL_chopset, ' ') != NULL);
421 const char *chophere = NULL;
422 char *linemark = NULL;
65202027 423 NV value;
9c5ffd7c 424 bool gotsome = FALSE;
a0d0e21e 425 STRLEN len;
823a54a3 426 const STRLEN fudge = SvPOK(tmpForm)
24c89738 427 ? (SvCUR(tmpForm) * (IN_BYTES ? 1 : 3) + 1) : 0;
1bd51a4c
IH		 428 bool item_is_utf8 = FALSE;
429 bool targ_is_utf8 = FALSE;
c445ea15 430 SV * nsv = NULL;
cbbf8932 431 OP * parseres = NULL;
bfed75c6 432 const char *fmt;
a1b95068 433 bool oneline;
a0d0e21e 434
76e3520e 435 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
445b3f51
GS		 436 if (SvREADONLY(tmpForm)) {
437 SvREADONLY_off(tmpForm);
a1b95068 438 parseres = doparseform(tmpForm);
445b3f51
GS		 439 SvREADONLY_on(tmpForm);
440 }
441 else
a1b95068
LW		 442 parseres = doparseform(tmpForm);
443 if (parseres)
444 return parseres;
a0d0e21e 445 }
3280af22 446 SvPV_force(PL_formtarget, len);
1bd51a4c
IH		 447 if (DO_UTF8(PL_formtarget))
448 targ_is_utf8 = TRUE;
a0ed51b3 449 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
a0d0e21e 450 t += len;
245d4a47 451 f = SvPV_const(tmpForm, len);
a0d0e21e 452 /* need to jump to the next word */
245d4a47 453 fpc = (U32*)(f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN);
a0d0e21e
LW		 454
455 for (;;) {
456 DEBUG_f( {
bfed75c6 457 const char *name = "???";
a0d0e21e
LW		 458 arg = -1;
459 switch (*fpc) {
460 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
461 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
462 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
463 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
464 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
465
466 case FF_CHECKNL: name = "CHECKNL"; break;
467 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
468 case FF_SPACE: name = "SPACE"; break;
469 case FF_HALFSPACE: name = "HALFSPACE"; break;
470 case FF_ITEM: name = "ITEM"; break;
471 case FF_CHOP: name = "CHOP"; break;
472 case FF_LINEGLOB: name = "LINEGLOB"; break;
473 case FF_NEWLINE: name = "NEWLINE"; break;
474 case FF_MORE: name = "MORE"; break;
475 case FF_LINEMARK: name = "LINEMARK"; break;
476 case FF_END: name = "END"; break;
bfed75c6 477 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 478 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW		 479 }
480 if (arg >= 0)
bf49b057 481 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 482 else
bf49b057 483 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 484 } );
a0d0e21e
LW		 485 switch (*fpc++) {
486 case FF_LINEMARK:
487 linemark = t;
a0d0e21e
LW		 488 lines++;
489 gotsome = FALSE;
490 break;
491
492 case FF_LITERAL:
493 arg = *fpc++;
1bd51a4c 494 if (targ_is_utf8 && !SvUTF8(tmpForm)) {
b15aece3 495 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
78da4d13
JH		 496 *t = '\0';
497 sv_catpvn_utf8_upgrade(PL_formtarget, f, arg, nsv);
498 t = SvEND(PL_formtarget);
1bd51a4c
IH		 499 break;
500 }
501 if (!targ_is_utf8 && DO_UTF8(tmpForm)) {
b15aece3 502 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH		 503 *t = '\0';
504 sv_utf8_upgrade(PL_formtarget);
505 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
506 t = SvEND(PL_formtarget);
507 targ_is_utf8 = TRUE;
508 }
a0d0e21e
LW		 509 while (arg--)
510 *t++ = *f++;
511 break;
512
513 case FF_SKIP:
514 f += *fpc++;
515 break;
516
517 case FF_FETCH:
518 arg = *fpc++;
519 f += arg;
520 fieldsize = arg;
521
522 if (MARK < SP)
523 sv = *++MARK;
524 else {
3280af22 525 sv = &PL_sv_no;
599cee73 526 if (ckWARN(WARN_SYNTAX))
9014280d 527 Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e
LW		 528 }
529 break;
530
531 case FF_CHECKNL:
5a34cab7
NC		 532 {
533 const char *send;
534 const char *s = item = SvPV_const(sv, len);
535 itemsize = len;
536 if (DO_UTF8(sv)) {
537 itemsize = sv_len_utf8(sv);
538 if (itemsize != (I32)len) {
539 I32 itembytes;
540 if (itemsize > fieldsize) {
541 itemsize = fieldsize;
542 itembytes = itemsize;
543 sv_pos_u2b(sv, &itembytes, 0);
544 }
545 else
546 itembytes = len;
547 send = chophere = s + itembytes;
548 while (s < send) {
549 if (*s & ~31)
550 gotsome = TRUE;
551 else if (*s == '\n')
552 break;
553 s++;
554 }
555 item_is_utf8 = TRUE;
556 itemsize = s - item;
557 sv_pos_b2u(sv, &itemsize);
558 break;
a0ed51b3 559 }
a0ed51b3 560 }
5a34cab7
NC		 561 item_is_utf8 = FALSE;
562 if (itemsize > fieldsize)
563 itemsize = fieldsize;
564 send = chophere = s + itemsize;
565 while (s < send) {
566 if (*s & ~31)
567 gotsome = TRUE;
568 else if (*s == '\n')
569 break;
570 s++;
571 }
572 itemsize = s - item;
573 break;
a0ed51b3 574 }
a0d0e21e
LW		 575
576 case FF_CHECKCHOP:
5a34cab7
NC		 577 {
578 const char *s = item = SvPV_const(sv, len);
579 itemsize = len;
580 if (DO_UTF8(sv)) {
581 itemsize = sv_len_utf8(sv);
582 if (itemsize != (I32)len) {
583 I32 itembytes;
584 if (itemsize <= fieldsize) {
585 const char *send = chophere = s + itemsize;
586 while (s < send) {
587 if (*s == '\r') {
588 itemsize = s - item;
a0ed51b3 589 chophere = s;
a0ed51b3 590 break;
5a34cab7
NC		 591 }
592 if (*s++ & ~31)
a0ed51b3 593 gotsome = TRUE;
a0ed51b3 594 }
a0ed51b3 595 }
5a34cab7
NC		 596 else {
597 const char *send;
598 itemsize = fieldsize;
599 itembytes = itemsize;
600 sv_pos_u2b(sv, &itembytes, 0);
601 send = chophere = s + itembytes;
602 while (s < send || (s == send && isSPACE(*s))) {
603 if (isSPACE(*s)) {
604 if (chopspace)
605 chophere = s;
606 if (*s == '\r')
607 break;
608 }
609 else {
610 if (*s & ~31)
611 gotsome = TRUE;
612 if (strchr(PL_chopset, *s))
613 chophere = s + 1;
614 }
615 s++;
616 }
617 itemsize = chophere - item;
618 sv_pos_b2u(sv, &itemsize);
619 }
620 item_is_utf8 = TRUE;
a0d0e21e
LW		 621 break;
622 }
a0d0e21e 623 }
5a34cab7
NC		 624 item_is_utf8 = FALSE;
625 if (itemsize <= fieldsize) {
626 const char *const send = chophere = s + itemsize;
627 while (s < send) {
628 if (*s == '\r') {
629 itemsize = s - item;
a0d0e21e 630 chophere = s;
a0d0e21e 631 break;
5a34cab7
NC		 632 }
633 if (*s++ & ~31)
a0d0e21e 634 gotsome = TRUE;
a0d0e21e 635 }
a0d0e21e 636 }
5a34cab7
NC		 637 else {
638 const char *send;
639 itemsize = fieldsize;
640 send = chophere = s + itemsize;
641 while (s < send || (s == send && isSPACE(*s))) {
642 if (isSPACE(*s)) {
643 if (chopspace)
644 chophere = s;
645 if (*s == '\r')
646 break;
647 }
648 else {
649 if (*s & ~31)
650 gotsome = TRUE;
651 if (strchr(PL_chopset, *s))
652 chophere = s + 1;
653 }
654 s++;
655 }
656 itemsize = chophere - item;
657 }
658 break;
a0d0e21e 659 }
a0d0e21e
LW		 660
661 case FF_SPACE:
662 arg = fieldsize - itemsize;
663 if (arg) {
664 fieldsize -= arg;
665 while (arg-- > 0)
666 *t++ = ' ';
667 }
668 break;
669
670 case FF_HALFSPACE:
671 arg = fieldsize - itemsize;
672 if (arg) {
673 arg /= 2;
674 fieldsize -= arg;
675 while (arg-- > 0)
676 *t++ = ' ';
677 }
678 break;
679
680 case FF_ITEM:
5a34cab7
NC		 681 {
682 const char *s = item;
683 arg = itemsize;
684 if (item_is_utf8) {
685 if (!targ_is_utf8) {
686 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
687 *t = '\0';
688 sv_utf8_upgrade(PL_formtarget);
689 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
690 t = SvEND(PL_formtarget);
691 targ_is_utf8 = TRUE;
a0ed51b3 692 }
5a34cab7
NC		 693 while (arg--) {
694 if (UTF8_IS_CONTINUED(*s)) {
695 STRLEN skip = UTF8SKIP(s);
696 switch (skip) {
697 default:
698 Move(s,t,skip,char);
699 s += skip;
700 t += skip;
701 break;
702 case 7: *t++ = *s++;
703 case 6: *t++ = *s++;
704 case 5: *t++ = *s++;
705 case 4: *t++ = *s++;
706 case 3: *t++ = *s++;
707 case 2: *t++ = *s++;
708 case 1: *t++ = *s++;
709 }
710 }
711 else {
712 if ( !((*t++ = *s++) & ~31) )
713 t[-1] = ' ';
714 }
a0ed51b3 715 }
5a34cab7 716 break;
a0ed51b3 717 }
5a34cab7
NC		 718 if (targ_is_utf8 && !item_is_utf8) {
719 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
720 *t = '\0';
721 sv_catpvn_utf8_upgrade(PL_formtarget, s, arg, nsv);
722 for (; t < SvEND(PL_formtarget); t++) {
78da4d13 723#ifdef EBCDIC
901017d6 724 const int ch = *t;
5a34cab7 725 if (iscntrl(ch))
78da4d13 726#else
5a34cab7 727 if (!(*t & ~31))
78da4d13 728#endif
5a34cab7
NC		 729 *t = ' ';
730 }
731 break;
78da4d13 732 }
5a34cab7 733 while (arg--) {
9d116dd7 734#ifdef EBCDIC
901017d6 735 const int ch = *t++ = *s++;
5a34cab7 736 if (iscntrl(ch))
a0d0e21e 737#else
5a34cab7 738 if ( !((*t++ = *s++) & ~31) )
a0d0e21e 739#endif
5a34cab7
NC		 740 t[-1] = ' ';
741 }
742 break;
a0d0e21e 743 }
a0d0e21e
LW		 744
745 case FF_CHOP:
5a34cab7
NC		 746 {
747 const char *s = chophere;
748 if (chopspace) {
af68e756 749 while (isSPACE(*s))
5a34cab7
NC		 750 s++;
751 }
752 sv_chop(sv,s);
753 SvSETMAGIC(sv);
754 break;
a0d0e21e 755 }
a0d0e21e 756
a1b95068
LW		 757 case FF_LINESNGL:
758 chopspace = 0;
759 oneline = TRUE;
760 goto ff_line;
a0d0e21e 761 case FF_LINEGLOB:
a1b95068
LW		 762 oneline = FALSE;
763 ff_line:
5a34cab7
NC		 764 {
765 const char *s = item = SvPV_const(sv, len);
766 itemsize = len;
767 if ((item_is_utf8 = DO_UTF8(sv)))
768 itemsize = sv_len_utf8(sv);
769 if (itemsize) {
770 bool chopped = FALSE;
771 const char *const send = s + len;
772 gotsome = TRUE;
773 chophere = s + itemsize;
774 while (s < send) {
775 if (*s++ == '\n') {
776 if (oneline) {
777 chopped = TRUE;
778 chophere = s;
779 break;
780 } else {
781 if (s == send) {
782 itemsize--;
783 chopped = TRUE;
784 } else
785 lines++;
786 }
1bd51a4c 787 }
a0d0e21e 788 }
5a34cab7
NC		 789 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
790 if (targ_is_utf8)
791 SvUTF8_on(PL_formtarget);
792 if (oneline) {
793 SvCUR_set(sv, chophere - item);
794 sv_catsv(PL_formtarget, sv);
795 SvCUR_set(sv, itemsize);
796 } else
797 sv_catsv(PL_formtarget, sv);
798 if (chopped)
799 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) - 1);
800 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
801 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
802 if (item_is_utf8)
803 targ_is_utf8 = TRUE;
a0d0e21e 804 }
5a34cab7 805 break;
a0d0e21e 806 }
a0d0e21e 807
a1b95068
LW		 808 case FF_0DECIMAL:
809 arg = *fpc++;
810#if defined(USE_LONG_DOUBLE)
10edeb5d
JH		 811 fmt = (const char *)
812 ((arg & 256) ?
813 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 814#else
10edeb5d
JH		 815 fmt = (const char *)
816 ((arg & 256) ?
817 "%#0*.*f" : "%0*.*f");
a1b95068
LW		 818#endif
819 goto ff_dec;
a0d0e21e 820 case FF_DECIMAL:
a0d0e21e 821 arg = *fpc++;
65202027 822#if defined(USE_LONG_DOUBLE)
10edeb5d
JH		 823 fmt = (const char *)
824 ((arg & 256) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 825#else
10edeb5d
JH		 826 fmt = (const char *)
827 ((arg & 256) ? "%#*.*f" : "%*.*f");
65202027 828#endif
a1b95068 829 ff_dec:
784707d5
JP		 830 /* If the field is marked with ^ and the value is undefined,
831 blank it out. */
784707d5
JP		 832 if ((arg & 512) && !SvOK(sv)) {
833 arg = fieldsize;
834 while (arg--)
835 *t++ = ' ';
836 break;
837 }
838 gotsome = TRUE;
839 value = SvNV(sv);
a1b95068 840 /* overflow evidence */
bfed75c6 841 if (num_overflow(value, fieldsize, arg)) {
a1b95068
LW		 842 arg = fieldsize;
843 while (arg--)
844 *t++ = '#';
845 break;
846 }
784707d5
JP		 847 /* Formats aren't yet marked for locales, so assume "yes". */
848 {
849 STORE_NUMERIC_STANDARD_SET_LOCAL();
d9fad198 850 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg & 255, value);
784707d5
JP		 851 RESTORE_NUMERIC_STANDARD();
852 }
853 t += fieldsize;
854 break;
a1b95068 855
a0d0e21e
LW		 856 case FF_NEWLINE:
857 f++;
858 while (t-- > linemark && *t == ' ') ;
859 t++;
860 *t++ = '\n';
861 break;
862
863 case FF_BLANK:
864 arg = *fpc++;
865 if (gotsome) {
866 if (arg) { /* repeat until fields exhausted? */
867 *t = '\0';
b15aece3 868 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
3280af22 869 lines += FmLINES(PL_formtarget);
a0d0e21e
LW		 870 if (lines == 200) {
871 arg = t - linemark;
872 if (strnEQ(linemark, linemark - arg, arg))
cea2e8a9 873 DIE(aTHX_ "Runaway format");
a0d0e21e 874 }
1bd51a4c
IH		 875 if (targ_is_utf8)
876 SvUTF8_on(PL_formtarget);
3280af22 877 FmLINES(PL_formtarget) = lines;
a0d0e21e
LW		 878 SP = ORIGMARK;
879 RETURNOP(cLISTOP->op_first);
880 }
881 }
882 else {
883 t = linemark;
884 lines--;
885 }
886 break;
887
888 case FF_MORE:
5a34cab7
NC		 889 {
890 const char *s = chophere;
891 const char *send = item + len;
892 if (chopspace) {
af68e756 893 while (isSPACE(*s) && (s < send))
5a34cab7 894 s++;
a0d0e21e 895 }
5a34cab7
NC		 896 if (s < send) {
897 char *s1;
898 arg = fieldsize - itemsize;
899 if (arg) {
900 fieldsize -= arg;
901 while (arg-- > 0)
902 *t++ = ' ';
903 }
904 s1 = t - 3;
905 if (strnEQ(s1," ",3)) {
906 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
907 s1--;
908 }
909 *s1++ = '.';
910 *s1++ = '.';
911 *s1++ = '.';
a0d0e21e 912 }
5a34cab7 913 break;
a0d0e21e 914 }
a0d0e21e
LW		 915 case FF_END:
916 *t = '\0';
b15aece3 917 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH		 918 if (targ_is_utf8)
919 SvUTF8_on(PL_formtarget);
3280af22 920 FmLINES(PL_formtarget) += lines;
a0d0e21e
LW		 921 SP = ORIGMARK;
922 RETPUSHYES;
923 }
924 }
925}
926
927PP(pp_grepstart)
928{
27da23d5 929 dVAR; dSP;
a0d0e21e
LW		 930 SV *src;
931
3280af22 932 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 933 (void)POPMARK;
54310121 934 if (GIMME_V == G_SCALAR)
0b024f31 935 XPUSHs(sv_2mortal(newSViv(0)));
533c011a 936 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 937 }
3280af22 938 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
cea2e8a9
GS		 939 pp_pushmark(); /* push dst */
940 pp_pushmark(); /* push src */
a0d0e21e
LW		 941 ENTER; /* enter outer scope */
942
943 SAVETMPS;
59f00321
RGS		 944 if (PL_op->op_private & OPpGREP_LEX)
945 SAVESPTR(PAD_SVl(PL_op->op_targ));
946 else
947 SAVE_DEFSV;
a0d0e21e 948 ENTER; /* enter inner scope */
7766f137 949 SAVEVPTR(PL_curpm);
a0d0e21e 950
3280af22 951 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 952 SvTEMP_off(src);
59f00321
RGS		 953 if (PL_op->op_private & OPpGREP_LEX)
954 PAD_SVl(PL_op->op_targ) = src;
955 else
956 DEFSV = src;
a0d0e21e
LW		 957
958 PUTBACK;
533c011a 959 if (PL_op->op_type == OP_MAPSTART)
cea2e8a9 960 pp_pushmark(); /* push top */
533c011a 961 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW		 962}
963
a0d0e21e
LW		 964PP(pp_mapwhile)
965{
27da23d5 966 dVAR; dSP;
f54cb97a 967 const I32 gimme = GIMME_V;
544f3153 968 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW		 969 I32 count;
970 I32 shift;
971 SV** src;
ac27b0f5 972 SV** dst;
a0d0e21e 973
544f3153 974 /* first, move source pointer to the next item in the source list */
3280af22 975 ++PL_markstack_ptr[-1];
544f3153
GS		 976
977 /* if there are new items, push them into the destination list */
4c90a460 978 if (items && gimme != G_VOID) {
544f3153
GS		 979 /* might need to make room back there first */
980 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
981 /* XXX this implementation is very pessimal because the stack
982 * is repeatedly extended for every set of items. Is possible
983 * to do this without any stack extension or copying at all
984 * by maintaining a separate list over which the map iterates
18ef8bea 985 * (like foreach does). --gsar */
544f3153
GS		 986
987 /* everything in the stack after the destination list moves
988 * towards the end the stack by the amount of room needed */
989 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
990
991 /* items to shift up (accounting for the moved source pointer) */
992 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT		 993
994 /* This optimization is by Ben Tilly and it does
995 * things differently from what Sarathy (gsar)
996 * is describing. The downside of this optimization is
997 * that leaves "holes" (uninitialized and hopefully unused areas)
998 * to the Perl stack, but on the other hand this
999 * shouldn't be a problem. If Sarathy's idea gets
1000 * implemented, this optimization should become
1001 * irrelevant. --jhi */
1002 if (shift < count)
1003 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1004
924508f0
GS		 1005 EXTEND(SP,shift);
1006 src = SP;
1007 dst = (SP += shift);
3280af22
NIS		 1008 PL_markstack_ptr[-1] += shift;
1009 *PL_markstack_ptr += shift;
544f3153 1010 while (count--)
a0d0e21e
LW		 1011 *dst-- = *src--;
1012 }
544f3153 1013 /* copy the new items down to the destination list */
ac27b0f5 1014 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26
TP		 1015 if (gimme == G_ARRAY) {
1016 while (items-- > 0)
1017 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
1018 }
bfed75c6 1019 else {
22023b26
TP		 1020 /* scalar context: we don't care about which values map returns
1021 * (we use undef here). And so we certainly don't want to do mortal
1022 * copies of meaningless values. */
1023 while (items-- > 0) {
b988aa42 1024 (void)POPs;
22023b26
TP		 1025 *dst-- = &PL_sv_undef;
1026 }
1027 }
a0d0e21e
LW		 1028 }
1029 LEAVE; /* exit inner scope */
1030
1031 /* All done yet? */
3280af22 1032 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW		 1033
1034 (void)POPMARK; /* pop top */
1035 LEAVE; /* exit outer scope */
1036 (void)POPMARK; /* pop src */
3280af22 1037 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1038 (void)POPMARK; /* pop dst */
3280af22 1039 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1040 if (gimme == G_SCALAR) {
7cc47870
RGS		 1041 if (PL_op->op_private & OPpGREP_LEX) {
1042 SV* sv = sv_newmortal();
1043 sv_setiv(sv, items);
1044 PUSHs(sv);
1045 }
1046 else {
1047 dTARGET;
1048 XPUSHi(items);
1049 }
a0d0e21e 1050 }
54310121
PP		 1051 else if (gimme == G_ARRAY)
1052 SP += items;
a0d0e21e
LW		 1053 RETURN;
1054 }
1055 else {
1056 SV *src;
1057
1058 ENTER; /* enter inner scope */
7766f137 1059 SAVEVPTR(PL_curpm);
a0d0e21e 1060
544f3153 1061 /* set $_ to the new source item */
3280af22 1062 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1063 SvTEMP_off(src);
59f00321
RGS		 1064 if (PL_op->op_private & OPpGREP_LEX)
1065 PAD_SVl(PL_op->op_targ) = src;
1066 else
1067 DEFSV = src;
a0d0e21e
LW		 1068
1069 RETURNOP(cLOGOP->op_other);
1070 }
1071}
1072
a0d0e21e
LW		 1073/* Range stuff. */
1074
1075PP(pp_range)
1076{
97aff369 1077 dVAR;
a0d0e21e 1078 if (GIMME == G_ARRAY)
1a67a97c 1079 return NORMAL;
538573f7 1080 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1081 return cLOGOP->op_other;
538573f7 1082 else
1a67a97c 1083 return NORMAL;
a0d0e21e
LW		 1084}
1085
1086PP(pp_flip)
1087{
97aff369 1088 dVAR;
39644a26 1089 dSP;
a0d0e21e
LW		 1090
1091 if (GIMME == G_ARRAY) {
1a67a97c 1092 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1093 }
1094 else {
1095 dTOPss;
44f8325f 1096 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1097 int flip = 0;
790090df 1098
bfed75c6 1099 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST		 1100 if (GvIO(PL_last_in_gv)) {
1101 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1102 }
1103 else {
fafc274c 1104 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL		 1105 if (gv && GvSV(gv))
1106 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1107 }
bfed75c6
AL		 1108 } else {
1109 flip = SvTRUE(sv);
1110 }
1111 if (flip) {
a0d0e21e 1112 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1113 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1114 sv_setiv(targ, 1);
3e3baf6d 1115 SETs(targ);
a0d0e21e
LW		 1116 RETURN;
1117 }
1118 else {
1119 sv_setiv(targ, 0);
924508f0 1120 SP--;
1a67a97c 1121 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1122 }
1123 }
c69006e4 1124 sv_setpvn(TARG, "", 0);
a0d0e21e
LW		 1125 SETs(targ);
1126 RETURN;
1127 }
1128}
1129
8e9bbdb9
RGS		 1130/* This code tries to decide if "$left .. $right" should use the
1131 magical string increment, or if the range is numeric (we make
1132 an exception for .."0" [#18165]). AMS 20021031. */
1133
1134#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS		 1135 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1136 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1137 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1138 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1139 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1140
a0d0e21e
LW		 1141PP(pp_flop)
1142{
97aff369 1143 dVAR; dSP;
a0d0e21e
LW		 1144
1145 if (GIMME == G_ARRAY) {
1146 dPOPPOPssrl;
86cb7173 1147
5b295bef
RD		 1148 SvGETMAGIC(left);
1149 SvGETMAGIC(right);
a0d0e21e 1150
8e9bbdb9 1151 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL		 1152 register IV i, j;
1153 IV max;
4fe3f0fa
MHM		 1154 if ((SvOK(left) && SvNV(left) < IV_MIN) ||
1155 (SvOK(right) && SvNV(right) > IV_MAX))
d470f89e 1156 DIE(aTHX_ "Range iterator outside integer range");
a0d0e21e
LW		 1157 i = SvIV(left);
1158 max = SvIV(right);
bbce6d69 1159 if (max >= i) {
c1ab3db2
AK		 1160 j = max - i + 1;
1161 EXTEND_MORTAL(j);
1162 EXTEND(SP, j);
bbce6d69 1163 }
c1ab3db2
AK		 1164 else
1165 j = 0;
1166 while (j--) {
901017d6 1167 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW		 1168 PUSHs(sv);
1169 }
1170 }
1171 else {
44f8325f 1172 SV * const final = sv_mortalcopy(right);
13c5b33c 1173 STRLEN len;
823a54a3 1174 const char * const tmps = SvPV_const(final, len);
a0d0e21e 1175
901017d6 1176 SV *sv = sv_mortalcopy(left);
13c5b33c 1177 SvPV_force_nolen(sv);
89ea2908 1178 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1179 XPUSHs(sv);
b15aece3 1180 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1181 break;
a0d0e21e
LW		 1182 sv = sv_2mortal(newSVsv(sv));
1183 sv_inc(sv);
1184 }
a0d0e21e
LW		 1185 }
1186 }
1187 else {
1188 dTOPss;
901017d6 1189 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1190 int flop = 0;
a0d0e21e 1191 sv_inc(targ);
4e3399f9
YST		 1192
1193 if (PL_op->op_private & OPpFLIP_LINENUM) {
1194 if (GvIO(PL_last_in_gv)) {
1195 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1196 }
1197 else {
fafc274c 1198 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST		 1199 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1200 }
1201 }
1202 else {
1203 flop = SvTRUE(sv);
1204 }
1205
1206 if (flop) {
a0d0e21e 1207 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1208 sv_catpvs(targ, "E0");
a0d0e21e
LW		 1209 }
1210 SETs(targ);
1211 }
1212
1213 RETURN;
1214}
1215
1216/* Control. */
1217
27da23d5 1218static const char * const context_name[] = {
515afda2
NC		 1219 "pseudo-block",
1220 "subroutine",
1221 "eval",
1222 "loop",
1223 "substitution",
1224 "block",
0d863452
RH		 1225 "format",
1226 "given",
1227 "when"
515afda2
NC		 1228};
1229
76e3520e 1230STATIC I32
06b5626a 1231S_dopoptolabel(pTHX_ const char *label)
a0d0e21e 1232{
97aff369 1233 dVAR;
a0d0e21e 1234 register I32 i;
a0d0e21e
LW		 1235
1236 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1237 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1238 switch (CxTYPE(cx)) {
a0d0e21e 1239 case CXt_SUBST:
a0d0e21e 1240 case CXt_SUB:
7766f137 1241 case CXt_FORMAT:
a0d0e21e 1242 case CXt_EVAL:
0a753a76 1243 case CXt_NULL:
0d863452
RH		 1244 case CXt_GIVEN:
1245 case CXt_WHEN:
e476b1b5 1246 if (ckWARN(WARN_EXITING))
515afda2
NC		 1247 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1248 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1249 if (CxTYPE(cx) == CXt_NULL)
1250 return -1;
1251 break;
a0d0e21e 1252 case CXt_LOOP:
901017d6 1253 if ( !cx->blk_loop.label || strNE(label, cx->blk_loop.label) ) {
cea2e8a9 1254 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
68dc0745 1255 (long)i, cx->blk_loop.label));
a0d0e21e
LW		 1256 continue;
1257 }
cea2e8a9 1258 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
a0d0e21e
LW		 1259 return i;
1260 }
1261 }
1262 return i;
1263}
1264
0d863452
RH		 1265
1266
e50aee73 1267I32
864dbfa3 1268Perl_dowantarray(pTHX)
e50aee73 1269{
97aff369 1270 dVAR;
f54cb97a 1271 const I32 gimme = block_gimme();
54310121
PP		 1272 return (gimme == G_VOID) ? G_SCALAR : gimme;
1273}
1274
1275I32
864dbfa3 1276Perl_block_gimme(pTHX)
54310121 1277{
97aff369 1278 dVAR;
06b5626a 1279 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1280 if (cxix < 0)
46fc3d4c 1281 return G_VOID;
e50aee73 1282
54310121 1283 switch (cxstack[cxix].blk_gimme) {
d2719217
GS		 1284 case G_VOID:
1285 return G_VOID;
54310121 1286 case G_SCALAR:
e50aee73 1287 return G_SCALAR;
54310121
PP		 1288 case G_ARRAY:
1289 return G_ARRAY;
1290 default:
cea2e8a9 1291 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
d2719217
GS		 1292 /* NOTREACHED */
1293 return 0;
54310121 1294 }
e50aee73
AD		 1295}
1296
78f9721b
SM		 1297I32
1298Perl_is_lvalue_sub(pTHX)
1299{
97aff369 1300 dVAR;
06b5626a 1301 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM		 1302 assert(cxix >= 0); /* We should only be called from inside subs */
1303
cc8d50a7
NC		 1304 if (cxstack[cxix].blk_sub.lval && CvLVALUE(cxstack[cxix].blk_sub.cv))
1305 return cxstack[cxix].blk_sub.lval;
78f9721b
SM		 1306 else
1307 return 0;
1308}
1309
76e3520e 1310STATIC I32
cea2e8a9 1311S_dopoptosub(pTHX_ I32 startingblock)
a0d0e21e 1312{
97aff369 1313 dVAR;
2c375eb9
GS		 1314 return dopoptosub_at(cxstack, startingblock);
1315}
1316
1317STATIC I32
901017d6 1318S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1319{
97aff369 1320 dVAR;
a0d0e21e 1321 I32 i;
a0d0e21e 1322 for (i = startingblock; i >= 0; i--) {
901017d6 1323 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1324 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1325 default:
1326 continue;
1327 case CXt_EVAL:
1328 case CXt_SUB:
7766f137 1329 case CXt_FORMAT:
cea2e8a9 1330 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
a0d0e21e
LW		 1331 return i;
1332 }
1333 }
1334 return i;
1335}
1336
76e3520e 1337STATIC I32
cea2e8a9 1338S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1339{
97aff369 1340 dVAR;
a0d0e21e 1341 I32 i;
a0d0e21e 1342 for (i = startingblock; i >= 0; i--) {
06b5626a 1343 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1344 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1345 default:
1346 continue;
1347 case CXt_EVAL:
cea2e8a9 1348 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
a0d0e21e
LW		 1349 return i;
1350 }
1351 }
1352 return i;
1353}
1354
76e3520e 1355STATIC I32
cea2e8a9 1356S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1357{
97aff369 1358 dVAR;
a0d0e21e 1359 I32 i;
a0d0e21e 1360 for (i = startingblock; i >= 0; i--) {
901017d6 1361 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1362 switch (CxTYPE(cx)) {
a0d0e21e 1363 case CXt_SUBST:
a0d0e21e 1364 case CXt_SUB:
7766f137 1365 case CXt_FORMAT:
a0d0e21e 1366 case CXt_EVAL:
0a753a76 1367 case CXt_NULL:
e476b1b5 1368 if (ckWARN(WARN_EXITING))
515afda2
NC		 1369 Perl_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1370 context_name[CxTYPE(cx)], OP_NAME(PL_op));
1371 if ((CxTYPE(cx)) == CXt_NULL)
1372 return -1;
1373 break;
a0d0e21e 1374 case CXt_LOOP:
cea2e8a9 1375 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
a0d0e21e
LW		 1376 return i;
1377 }
1378 }
1379 return i;
1380}
1381
0d863452
RH		 1382STATIC I32
1383S_dopoptogiven(pTHX_ I32 startingblock)
1384{
97aff369 1385 dVAR;
0d863452
RH		 1386 I32 i;
1387 for (i = startingblock; i >= 0; i--) {
1388 register const PERL_CONTEXT *cx = &cxstack[i];
1389 switch (CxTYPE(cx)) {
1390 default:
1391 continue;
1392 case CXt_GIVEN:
1393 DEBUG_l( Perl_deb(aTHX_ "(Found given #%ld)\n", (long)i));
1394 return i;
1395 case CXt_LOOP:
1396 if (CxFOREACHDEF(cx)) {
1397 DEBUG_l( Perl_deb(aTHX_ "(Found foreach #%ld)\n", (long)i));
1398 return i;
1399 }
1400 }
1401 }
1402 return i;
1403}
1404
1405STATIC I32
1406S_dopoptowhen(pTHX_ I32 startingblock)
1407{
97aff369 1408 dVAR;
0d863452
RH		 1409 I32 i;
1410 for (i = startingblock; i >= 0; i--) {
1411 register const PERL_CONTEXT *cx = &cxstack[i];
1412 switch (CxTYPE(cx)) {
1413 default:
1414 continue;
1415 case CXt_WHEN:
1416 DEBUG_l( Perl_deb(aTHX_ "(Found when #%ld)\n", (long)i));
1417 return i;
1418 }
1419 }
1420 return i;
1421}
1422
a0d0e21e 1423void
864dbfa3 1424Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1425{
97aff369 1426 dVAR;
a0d0e21e
LW		 1427 I32 optype;
1428
1429 while (cxstack_ix > cxix) {
b0d9ce38 1430 SV *sv;
06b5626a 1431 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c90c0ff4 1432 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
22c35a8c 1433 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
a0d0e21e 1434 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1435 switch (CxTYPE(cx)) {
c90c0ff4
PP		 1436 case CXt_SUBST:
1437 POPSUBST(cx);
1438 continue; /* not break */
a0d0e21e 1439 case CXt_SUB:
b0d9ce38
GS		 1440 POPSUB(cx,sv);
1441 LEAVESUB(sv);
a0d0e21e
LW		 1442 break;
1443 case CXt_EVAL:
1444 POPEVAL(cx);
1445 break;
1446 case CXt_LOOP:
1447 POPLOOP(cx);
1448 break;
0a753a76 1449 case CXt_NULL:
a0d0e21e 1450 break;
7766f137
GS		 1451 case CXt_FORMAT:
1452 POPFORMAT(cx);
1453 break;
a0d0e21e 1454 }
c90c0ff4 1455 cxstack_ix--;
a0d0e21e 1456 }
1b6737cc 1457 PERL_UNUSED_VAR(optype);
a0d0e21e
LW		 1458}
1459
5a844595
GS		 1460void
1461Perl_qerror(pTHX_ SV *err)
1462{
97aff369 1463 dVAR;
5a844595
GS		 1464 if (PL_in_eval)
1465 sv_catsv(ERRSV, err);
1466 else if (PL_errors)
1467 sv_catsv(PL_errors, err);
1468 else
be2597df 1469 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
5a844595
GS		 1470 ++PL_error_count;
1471}
1472
a0d0e21e 1473OP *
35a4481c 1474Perl_die_where(pTHX_ const char *message, STRLEN msglen)
a0d0e21e 1475{
27da23d5 1476 dVAR;
87582a92 1477
3280af22 1478 if (PL_in_eval) {
a0d0e21e 1479 I32 cxix;
a0d0e21e 1480 I32 gimme;
a0d0e21e 1481
4e6ea2c3 1482 if (message) {
faef0170 1483 if (PL_in_eval & EVAL_KEEPERR) {
bfed75c6 1484 static const char prefix[] = "\t(in cleanup) ";
2d03de9c 1485 SV * const err = ERRSV;
c445ea15 1486 const char *e = NULL;
98eae8f5 1487 if (!SvPOK(err))
c69006e4 1488 sv_setpvn(err,"",0);
98eae8f5 1489 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
0510663f 1490 STRLEN len;
349d4f2f 1491 e = SvPV_const(err, len);
0510663f 1492 e += len - msglen;
98eae8f5 1493 if (*e != *message || strNE(e,message))
c445ea15 1494 e = NULL;
98eae8f5
GS		 1495 }
1496 if (!e) {
1497 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1498 sv_catpvn(err, prefix, sizeof(prefix)-1);
1499 sv_catpvn(err, message, msglen);
e476b1b5 1500 if (ckWARN(WARN_MISC)) {
504618e9 1501 const STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
b15aece3 1502 Perl_warner(aTHX_ packWARN(WARN_MISC), SvPVX_const(err)+start);
4e6ea2c3 1503 }
4633a7c4 1504 }
4633a7c4 1505 }
1aa99e6b 1506 else {
06bf62c7 1507 sv_setpvn(ERRSV, message, msglen);
1aa99e6b 1508 }
4633a7c4 1509 }
4e6ea2c3 1510
5a844595
GS		 1511 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1512 && PL_curstackinfo->si_prev)
1513 {
bac4b2ad 1514 dounwind(-1);
d3acc0f7 1515 POPSTACK;
bac4b2ad 1516 }
e336de0d 1517
a0d0e21e
LW		 1518 if (cxix >= 0) {
1519 I32 optype;
35a4481c 1520 register PERL_CONTEXT *cx;
901017d6 1521 SV **newsp;
a0d0e21e
LW		 1522
1523 if (cxix < cxstack_ix)
1524 dounwind(cxix);
1525
3280af22 1526 POPBLOCK(cx,PL_curpm);
6b35e009 1527 if (CxTYPE(cx) != CXt_EVAL) {
16869676 1528 if (!message)
349d4f2f 1529 message = SvPVx_const(ERRSV, msglen);
10edeb5d 1530 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1531 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW		 1532 my_exit(1);
1533 }
1534 POPEVAL(cx);
1535
1536 if (gimme == G_SCALAR)
3280af22
NIS		 1537 *++newsp = &PL_sv_undef;
1538 PL_stack_sp = newsp;
a0d0e21e
LW		 1539
1540 LEAVE;
748a9306 1541
7fb6a879
GS		 1542 /* LEAVE could clobber PL_curcop (see save_re_context())
1543 * XXX it might be better to find a way to avoid messing with
1544 * PL_curcop in save_re_context() instead, but this is a more
1545 * minimal fix --GSAR */
1546 PL_curcop = cx->blk_oldcop;
1547
7a2e2cd6 1548 if (optype == OP_REQUIRE) {
44f8325f 1549 const char* const msg = SvPVx_nolen_const(ERRSV);
901017d6 1550 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 1551 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 1552 &PL_sv_undef, 0);
5a844595
GS		 1553 DIE(aTHX_ "%sCompilation failed in require",
1554 *msg ? msg : "Unknown error\n");
7a2e2cd6 1555 }
f39bc417
DM		 1556 assert(CxTYPE(cx) == CXt_EVAL);
1557 return cx->blk_eval.retop;
a0d0e21e
LW		 1558 }
1559 }
9cc2fdd3 1560 if (!message)
349d4f2f 1561 message = SvPVx_const(ERRSV, msglen);
87582a92 1562
7ff03255 1563 write_to_stderr(message, msglen);
f86702cc
PP		 1564 my_failure_exit();
1565 /* NOTREACHED */
a0d0e21e
LW		 1566 return 0;
1567}
1568
1569PP(pp_xor)
1570{
97aff369 1571 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW		 1572 if (SvTRUE(left) != SvTRUE(right))
1573 RETSETYES;
1574 else
1575 RETSETNO;
1576}
1577
a0d0e21e
LW		 1578PP(pp_caller)
1579{
97aff369 1580 dVAR;
39644a26 1581 dSP;
a0d0e21e 1582 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL		 1583 register const PERL_CONTEXT *cx;
1584 register const PERL_CONTEXT *ccstack = cxstack;
1585 const PERL_SI *top_si = PL_curstackinfo;
54310121 1586 I32 gimme;
06b5626a 1587 const char *stashname;
a0d0e21e
LW		 1588 I32 count = 0;
1589
1590 if (MAXARG)
1591 count = POPi;
27d41816 1592
a0d0e21e 1593 for (;;) {
2c375eb9
GS		 1594 /* we may be in a higher stacklevel, so dig down deeper */
1595 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1596 top_si = top_si->si_prev;
1597 ccstack = top_si->si_cxstack;
1598 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1599 }
a0d0e21e 1600 if (cxix < 0) {
27d41816
DM		 1601 if (GIMME != G_ARRAY) {
1602 EXTEND(SP, 1);
a0d0e21e 1603 RETPUSHUNDEF;
27d41816 1604 }
a0d0e21e
LW		 1605 RETURN;
1606 }
f2a7f298 1607 /* caller() should not report the automatic calls to &DB::sub */
1608 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1609 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW		 1610 count++;
1611 if (!count--)
1612 break;
2c375eb9 1613 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1614 }
2c375eb9
GS		 1615
1616 cx = &ccstack[cxix];
7766f137 1617 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1618 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1619 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1620 field below is defined for any cx. */
f2a7f298 1621 /* caller() should not report the automatic calls to &DB::sub */
1622 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1623 cx = &ccstack[dbcxix];
06a5b730
PP		 1624 }
1625
ed094faf 1626 stashname = CopSTASHPV(cx->blk_oldcop);
a0d0e21e 1627 if (GIMME != G_ARRAY) {
27d41816 1628 EXTEND(SP, 1);
ed094faf 1629 if (!stashname)
3280af22 1630 PUSHs(&PL_sv_undef);
49d8d3a1
MB		 1631 else {
1632 dTARGET;
ed094faf 1633 sv_setpv(TARG, stashname);
49d8d3a1
MB		 1634 PUSHs(TARG);
1635 }
a0d0e21e
LW		 1636 RETURN;
1637 }
a0d0e21e 1638
b3ca2e83 1639 EXTEND(SP, 11);
27d41816 1640
ed094faf 1641 if (!stashname)
3280af22 1642 PUSHs(&PL_sv_undef);
49d8d3a1 1643 else
ed094faf 1644 PUSHs(sv_2mortal(newSVpv(stashname, 0)));
248c2a4d 1645 PUSHs(sv_2mortal(newSVpv(OutCopFILE(cx->blk_oldcop), 0)));
57843af0 1646 PUSHs(sv_2mortal(newSViv((I32)CopLINE(cx->blk_oldcop))));
a0d0e21e
LW		 1647 if (!MAXARG)
1648 RETURN;
7766f137 1649 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
0bd48802 1650 GV * const cvgv = CvGV(ccstack[cxix].blk_sub.cv);
7766f137 1651 /* So is ccstack[dbcxix]. */
07b8c804 1652 if (isGV(cvgv)) {
561b68a9 1653 SV * const sv = newSV(0);
c445ea15 1654 gv_efullname3(sv, cvgv, NULL);
07b8c804 1655 PUSHs(sv_2mortal(sv));
cc8d50a7 1656 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804
RGS		 1657 }
1658 else {
396482e1 1659 PUSHs(sv_2mortal(newSVpvs("(unknown)")));
cc8d50a7 1660 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
07b8c804 1661 }
a0d0e21e
LW		 1662 }
1663 else {
396482e1 1664 PUSHs(sv_2mortal(newSVpvs("(eval)")));
a0d0e21e
LW		 1665 PUSHs(sv_2mortal(newSViv(0)));
1666 }
54310121
PP		 1667 gimme = (I32)cx->blk_gimme;
1668 if (gimme == G_VOID)
3280af22 1669 PUSHs(&PL_sv_undef);
54310121
PP		 1670 else
1671 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
6b35e009 1672 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1673 /* eval STRING */
06a5b730 1674 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
4633a7c4 1675 PUSHs(cx->blk_eval.cur_text);
3280af22 1676 PUSHs(&PL_sv_no);
0f79a09d 1677 }
811a4de9 1678 /* require */
0f79a09d
GS		 1679 else if (cx->blk_eval.old_namesv) {
1680 PUSHs(sv_2mortal(newSVsv(cx->blk_eval.old_namesv)));
3280af22 1681 PUSHs(&PL_sv_yes);
06a5b730 1682 }
811a4de9
GS		 1683 /* eval BLOCK (try blocks have old_namesv == 0) */
1684 else {
1685 PUSHs(&PL_sv_undef);
1686 PUSHs(&PL_sv_undef);
1687 }
4633a7c4 1688 }
a682de96
GS		 1689 else {
1690 PUSHs(&PL_sv_undef);
1691 PUSHs(&PL_sv_undef);
1692 }
cc8d50a7 1693 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
ed094faf 1694 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1695 {
66a1b24b
AL		 1696 AV * const ary = cx->blk_sub.argarray;
1697 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1698
3280af22 1699 if (!PL_dbargs) {
71315bf2 1700 GV* const tmpgv = gv_fetchpvs("DB::args", GV_ADD, SVt_PVAV);
0bd48802 1701 PL_dbargs = GvAV(gv_AVadd(tmpgv));
a5f75d66 1702 GvMULTI_on(tmpgv);
3ddcf04c 1703 AvREAL_off(PL_dbargs); /* XXX should be REIFY (see av.h) */
a0d0e21e
LW		 1704 }
1705
3280af22
NIS		 1706 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1707 av_extend(PL_dbargs, AvFILLp(ary) + off);
1708 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1709 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1710 }
f3aa04c2
GS		 1711 /* XXX only hints propagated via op_private are currently
1712 * visible (others are not easily accessible, since they
1713 * use the global PL_hints) */
623e6609 1714 PUSHs(sv_2mortal(newSViv(CopHINTS_get(cx->blk_oldcop))));
e476b1b5
GS		 1715 {
1716 SV * mask ;
72dc9ed5 1717 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1718
ac27b0f5 1719 if (old_warnings == pWARN_NONE ||
114bafba 1720 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1721 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1722 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS		 1723 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1724 /* Get the bit mask for $warnings::Bits{all}, because
1725 * it could have been extended by warnings::register */
1726 SV **bits_all;
0bd48802 1727 HV * const bits = get_hv("warnings::Bits", FALSE);
017a3ce5 1728 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS		 1729 mask = newSVsv(*bits_all);
1730 }
1731 else {
1732 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1733 }
1734 }
e476b1b5 1735 else
72dc9ed5 1736 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
e476b1b5
GS		 1737 PUSHs(sv_2mortal(mask));
1738 }
b3ca2e83 1739
c28fe1ec 1740 PUSHs(cx->blk_oldcop->cop_hints_hash ?
b3ca2e83 1741 sv_2mortal(newRV_noinc(
c28fe1ec
NC		 1742 (SV*)Perl_refcounted_he_chain_2hv(aTHX_
1743 cx->blk_oldcop->cop_hints_hash)))
b3ca2e83 1744 : &PL_sv_undef);
a0d0e21e
LW		 1745 RETURN;
1746}
1747
a0d0e21e
LW		 1748PP(pp_reset)
1749{
97aff369 1750 dVAR;
39644a26 1751 dSP;
10edeb5d 1752 const char * const tmps = (MAXARG < 1) ? (const char *)"" : POPpconstx;
11faa288 1753 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1754 PUSHs(&PL_sv_yes);
a0d0e21e
LW		 1755 RETURN;
1756}
1757
dd2155a4
DM		 1758/* like pp_nextstate, but used instead when the debugger is active */
1759
a0d0e21e
LW		 1760PP(pp_dbstate)
1761{
27da23d5 1762 dVAR;
533c011a 1763 PL_curcop = (COP*)PL_op;
a0d0e21e 1764 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1765 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW		 1766 FREETMPS;
1767
5df8de69
DM		 1768 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1769 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1770 {
39644a26 1771 dSP;
c09156bb 1772 register PERL_CONTEXT *cx;
f54cb97a 1773 const I32 gimme = G_ARRAY;
eb160463 1774 U8 hasargs;
0bd48802
AL		 1775 GV * const gv = PL_DBgv;
1776 register CV * const cv = GvCV(gv);
a0d0e21e 1777
a0d0e21e 1778 if (!cv)
cea2e8a9 1779 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1780
aea4f609
DM		 1781 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1782 /* don't do recursive DB::DB call */
a0d0e21e 1783 return NORMAL;
748a9306 1784
4633a7c4
LW		 1785 ENTER;
1786 SAVETMPS;
1787
3280af22 1788 SAVEI32(PL_debug);
55497cff 1789 SAVESTACK_POS();
3280af22 1790 PL_debug = 0;
748a9306 1791 hasargs = 0;
924508f0 1792 SPAGAIN;
748a9306 1793
aed2304a 1794 if (CvISXSUB(cv)) {
c127bd3a
SF		 1795 CvDEPTH(cv)++;
1796 PUSHMARK(SP);
1797 (void)(*CvXSUB(cv))(aTHX_ cv);
1798 CvDEPTH(cv)--;
1799 FREETMPS;
1800 LEAVE;
1801 return NORMAL;
1802 }
1803 else {
1804 PUSHBLOCK(cx, CXt_SUB, SP);
1805 PUSHSUB_DB(cx);
1806 cx->blk_sub.retop = PL_op->op_next;
1807 CvDEPTH(cv)++;
1808 SAVECOMPPAD();
1809 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1810 RETURNOP(CvSTART(cv));
1811 }
a0d0e21e
LW		 1812 }
1813 else
1814 return NORMAL;
1815}
1816
a0d0e21e
LW		 1817PP(pp_enteriter)
1818{
27da23d5 1819 dVAR; dSP; dMARK;
c09156bb 1820 register PERL_CONTEXT *cx;
f54cb97a 1821 const I32 gimme = GIMME_V;
a0d0e21e 1822 SV **svp;
df43650b 1823 U16 cxtype = CXt_LOOP | CXp_FOREACH;
7766f137
GS		 1824#ifdef USE_ITHREADS
1825 void *iterdata;
1826#endif
a0d0e21e 1827
4633a7c4
LW		 1828 ENTER;
1829 SAVETMPS;
1830
533c011a 1831 if (PL_op->op_targ) {
14f338dc
DM		 1832 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
1833 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
1834 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
1835 SVs_PADSTALE, SVs_PADSTALE);
1836 }
c3564e5c 1837#ifndef USE_ITHREADS
dd2155a4 1838 svp = &PAD_SVl(PL_op->op_targ); /* "my" variable */
54b9620d 1839 SAVESPTR(*svp);
c3564e5c
GS		 1840#else
1841 SAVEPADSV(PL_op->op_targ);
cbfa9890 1842 iterdata = INT2PTR(void*, PL_op->op_targ);
7766f137
GS		 1843 cxtype |= CXp_PADVAR;
1844#endif
54b9620d
MB		 1845 }
1846 else {
0bd48802 1847 GV * const gv = (GV*)POPs;
7766f137 1848 svp = &GvSV(gv); /* symbol table variable */
0214ae40 1849 SAVEGENERICSV(*svp);
561b68a9 1850 *svp = newSV(0);
7766f137
GS		 1851#ifdef USE_ITHREADS
1852 iterdata = (void*)gv;
1853#endif
54b9620d 1854 }
4633a7c4 1855
0d863452
RH		 1856 if (PL_op->op_private & OPpITER_DEF)
1857 cxtype |= CXp_FOR_DEF;
1858
a0d0e21e
LW		 1859 ENTER;
1860
7766f137
GS		 1861 PUSHBLOCK(cx, cxtype, SP);
1862#ifdef USE_ITHREADS
1863 PUSHLOOP(cx, iterdata, MARK);
1864#else
a0d0e21e 1865 PUSHLOOP(cx, svp, MARK);
7766f137 1866#endif
533c011a 1867 if (PL_op->op_flags & OPf_STACKED) {
44a8e56a 1868 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
89ea2908
GA		 1869 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1870 dPOPss;
0bd48802 1871 SV * const right = (SV*)cx->blk_loop.iterary;
984a4bea
RD		 1872 SvGETMAGIC(sv);
1873 SvGETMAGIC(right);
4fe3f0fa
MHM		 1874 if (RANGE_IS_NUMERIC(sv,right)) {
1875 if ((SvOK(sv) && SvNV(sv) < IV_MIN) ||
1876 (SvOK(right) && SvNV(right) >= IV_MAX))
076d9a11
MHM		 1877 DIE(aTHX_ "Range iterator outside integer range");
1878 cx->blk_loop.iterix = SvIV(sv);
4fe3f0fa 1879 cx->blk_loop.itermax = SvIV(right);
d4665a05
DM		 1880#ifdef DEBUGGING
1881 /* for correct -Dstv display */
1882 cx->blk_oldsp = sp - PL_stack_base;
1883#endif
89ea2908 1884 }
3f63a782 1885 else {
89ea2908 1886 cx->blk_loop.iterlval = newSVsv(sv);
13c5b33c 1887 (void) SvPV_force_nolen(cx->blk_loop.iterlval);
10516c54 1888 (void) SvPV_nolen_const(right);
3f63a782 1889 }
89ea2908 1890 }
ef3e5ea9 1891 else if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM		 1892 cx->blk_loop.itermax = 0;
1893 cx->blk_loop.iterix = AvFILL(cx->blk_loop.iterary) + 1;
ef3e5ea9
NC		 1894
1895 }
89ea2908 1896 }
4633a7c4 1897 else {
3280af22
NIS		 1898 cx->blk_loop.iterary = PL_curstack;
1899 AvFILLp(PL_curstack) = SP - PL_stack_base;
ef3e5ea9 1900 if (PL_op->op_private & OPpITER_REVERSED) {
6e585ca0
DM		 1901 cx->blk_loop.itermax = MARK - PL_stack_base + 1;
1902 cx->blk_loop.iterix = cx->blk_oldsp + 1;
ef3e5ea9
NC		 1903 }
1904 else {
1905 cx->blk_loop.iterix = MARK - PL_stack_base;
1906 }
4633a7c4 1907 }
a0d0e21e
LW		 1908
1909 RETURN;
1910}
1911
1912PP(pp_enterloop)
1913{
27da23d5 1914 dVAR; dSP;
c09156bb 1915 register PERL_CONTEXT *cx;
f54cb97a 1916 const I32 gimme = GIMME_V;
a0d0e21e
LW		 1917
1918 ENTER;
1919 SAVETMPS;
1920 ENTER;
1921
1922 PUSHBLOCK(cx, CXt_LOOP, SP);
1923 PUSHLOOP(cx, 0, SP);
1924
1925 RETURN;
1926}
1927
1928PP(pp_leaveloop)
1929{
27da23d5 1930 dVAR; dSP;
c09156bb 1931 register PERL_CONTEXT *cx;
a0d0e21e
LW		 1932 I32 gimme;
1933 SV **newsp;
1934 PMOP *newpm;
1935 SV **mark;
1936
1937 POPBLOCK(cx,newpm);
3a1b2b9e 1938 assert(CxTYPE(cx) == CXt_LOOP);
4fdae800 1939 mark = newsp;
a8bba7fa 1940 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 1941
a1f49e72 1942 TAINT_NOT;
54310121 1943 if (gimme == G_VOID)
6f207bd3 1944 NOOP;
54310121
PP		 1945 else if (gimme == G_SCALAR) {
1946 if (mark < SP)
1947 *++newsp = sv_mortalcopy(*SP);
1948 else
3280af22 1949 *++newsp = &PL_sv_undef;
a0d0e21e
LW		 1950 }
1951 else {
a1f49e72 1952 while (mark < SP) {
a0d0e21e 1953 *++newsp = sv_mortalcopy(*++mark);
a1f49e72
CS		 1954 TAINT_NOT; /* Each item is independent */
1955 }
a0d0e21e 1956 }
f86702cc
PP		 1957 SP = newsp;
1958 PUTBACK;
1959
a8bba7fa 1960 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 1961 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 1962
a0d0e21e
LW		 1963 LEAVE;
1964 LEAVE;
1965
f86702cc 1966 return NORMAL;
a0d0e21e
LW		 1967}
1968
1969PP(pp_return)
1970{
27da23d5 1971 dVAR; dSP; dMARK;
c09156bb 1972 register PERL_CONTEXT *cx;
f86702cc 1973 bool popsub2 = FALSE;
b45de488 1974 bool clear_errsv = FALSE;
a0d0e21e
LW		 1975 I32 gimme;
1976 SV **newsp;
1977 PMOP *newpm;
1978 I32 optype = 0;
b0d9ce38 1979 SV *sv;
f39bc417 1980 OP *retop;
a0d0e21e 1981
0bd48802
AL		 1982 const I32 cxix = dopoptosub(cxstack_ix);
1983
9850bf21
RH		 1984 if (cxix < 0) {
1985 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
1986 * sort block, which is a CXt_NULL
1987 * not a CXt_SUB */
1988 dounwind(0);
d7507f74
RH		 1989 PL_stack_base[1] = *PL_stack_sp;
1990 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW		 1991 return 0;
1992 }
9850bf21
RH		 1993 else
1994 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 1995 }
a0d0e21e
LW		 1996 if (cxix < cxstack_ix)
1997 dounwind(cxix);
1998
d7507f74
RH		 1999 if (CxMULTICALL(&cxstack[cxix])) {
2000 gimme = cxstack[cxix].blk_gimme;
2001 if (gimme == G_VOID)
2002 PL_stack_sp = PL_stack_base;
2003 else if (gimme == G_SCALAR) {
2004 PL_stack_base[1] = *PL_stack_sp;
2005 PL_stack_sp = PL_stack_base + 1;
2006 }
9850bf21 2007 return 0;
d7507f74 2008 }
9850bf21 2009
a0d0e21e 2010 POPBLOCK(cx,newpm);
6b35e009 2011 switch (CxTYPE(cx)) {
a0d0e21e 2012 case CXt_SUB:
f86702cc 2013 popsub2 = TRUE;
f39bc417 2014 retop = cx->blk_sub.retop;
5dd42e15 2015 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW		 2016 break;
2017 case CXt_EVAL:
b45de488
GS		 2018 if (!(PL_in_eval & EVAL_KEEPERR))
2019 clear_errsv = TRUE;
a0d0e21e 2020 POPEVAL(cx);
f39bc417 2021 retop = cx->blk_eval.retop;
1d76a5c3
GS		 2022 if (CxTRYBLOCK(cx))
2023 break;
067f92a0 2024 lex_end();
748a9306
LW		 2025 if (optype == OP_REQUIRE &&
2026 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2027 {
54310121 2028 /* Unassume the success we assumed earlier. */
901017d6 2029 SV * const nsv = cx->blk_eval.old_namesv;
b15aece3 2030 (void)hv_delete(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv), G_DISCARD);
be2597df 2031 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(nsv));
748a9306 2032 }
a0d0e21e 2033 break;
7766f137
GS		 2034 case CXt_FORMAT:
2035 POPFORMAT(cx);
f39bc417 2036 retop = cx->blk_sub.retop;
7766f137 2037 break;
a0d0e21e 2038 default:
cea2e8a9 2039 DIE(aTHX_ "panic: return");
a0d0e21e
LW		 2040 }
2041
a1f49e72 2042 TAINT_NOT;
a0d0e21e 2043 if (gimme == G_SCALAR) {
a29cdaf0
IZ		 2044 if (MARK < SP) {
2045 if (popsub2) {
a8bba7fa 2046 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
a29cdaf0
IZ		 2047 if (SvTEMP(TOPs)) {
2048 *++newsp = SvREFCNT_inc(*SP);
2049 FREETMPS;
2050 sv_2mortal(*newsp);
959e3673
GS		 2051 }
2052 else {
2053 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2054 FREETMPS;
959e3673
GS		 2055 *++newsp = sv_mortalcopy(sv);
2056 SvREFCNT_dec(sv);
a29cdaf0 2057 }
959e3673
GS		 2058 }
2059 else
a29cdaf0 2060 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
959e3673
GS		 2061 }
2062 else
a29cdaf0 2063 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2064 }
2065 else
3280af22 2066 *++newsp = &PL_sv_undef;
a0d0e21e 2067 }
54310121 2068 else if (gimme == G_ARRAY) {
a1f49e72 2069 while (++MARK <= SP) {
f86702cc
PP		 2070 *++newsp = (popsub2 && SvTEMP(*MARK))
2071 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2072 TAINT_NOT; /* Each item is independent */
2073 }
a0d0e21e 2074 }
3280af22 2075 PL_stack_sp = newsp;
a0d0e21e 2076
5dd42e15 2077 LEAVE;
f86702cc
PP		 2078 /* Stack values are safe: */
2079 if (popsub2) {
5dd42e15 2080 cxstack_ix--;
b0d9ce38 2081 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2082 }
b0d9ce38 2083 else
c445ea15 2084 sv = NULL;
3280af22 2085 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2086
b0d9ce38 2087 LEAVESUB(sv);
b45de488 2088 if (clear_errsv)
c69006e4 2089 sv_setpvn(ERRSV,"",0);
f39bc417 2090 return retop;
a0d0e21e
LW		 2091}
2092
2093PP(pp_last)
2094{
27da23d5 2095 dVAR; dSP;
a0d0e21e 2096 I32 cxix;
c09156bb 2097 register PERL_CONTEXT *cx;
f86702cc 2098 I32 pop2 = 0;
a0d0e21e 2099 I32 gimme;
8772537c 2100 I32 optype;
a0d0e21e
LW		 2101 OP *nextop;
2102 SV **newsp;
2103 PMOP *newpm;
a8bba7fa 2104 SV **mark;
c445ea15 2105 SV *sv = NULL;
9d4ba2ae 2106
a0d0e21e 2107
533c011a 2108 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2109 cxix = dopoptoloop(cxstack_ix);
2110 if (cxix < 0)
a651a37d 2111 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW		 2112 }
2113 else {
2114 cxix = dopoptolabel(cPVOP->op_pv);
2115 if (cxix < 0)
cea2e8a9 2116 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2117 }
2118 if (cxix < cxstack_ix)
2119 dounwind(cxix);
2120
2121 POPBLOCK(cx,newpm);
5dd42e15 2122 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2123 mark = newsp;
6b35e009 2124 switch (CxTYPE(cx)) {
a0d0e21e 2125 case CXt_LOOP:
f86702cc 2126 pop2 = CXt_LOOP;
a8bba7fa 2127 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2128 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2129 break;
f86702cc 2130 case CXt_SUB:
f86702cc 2131 pop2 = CXt_SUB;
f39bc417 2132 nextop = cx->blk_sub.retop;
a0d0e21e 2133 break;
f86702cc
PP		 2134 case CXt_EVAL:
2135 POPEVAL(cx);
f39bc417 2136 nextop = cx->blk_eval.retop;
a0d0e21e 2137 break;
7766f137
GS		 2138 case CXt_FORMAT:
2139 POPFORMAT(cx);
f39bc417 2140 nextop = cx->blk_sub.retop;
7766f137 2141 break;
a0d0e21e 2142 default:
cea2e8a9 2143 DIE(aTHX_ "panic: last");
a0d0e21e
LW		 2144 }
2145
a1f49e72 2146 TAINT_NOT;
a0d0e21e 2147 if (gimme == G_SCALAR) {
f86702cc
PP		 2148 if (MARK < SP)
2149 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
2150 ? *SP : sv_mortalcopy(*SP);
a0d0e21e 2151 else
3280af22 2152 *++newsp = &PL_sv_undef;
a0d0e21e 2153 }
54310121 2154 else if (gimme == G_ARRAY) {
a1f49e72 2155 while (++MARK <= SP) {
f86702cc
PP		 2156 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
2157 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2158 TAINT_NOT; /* Each item is independent */
2159 }
f86702cc
PP		 2160 }
2161 SP = newsp;
2162 PUTBACK;
2163
5dd42e15
DM		 2164 LEAVE;
2165 cxstack_ix--;
f86702cc
PP		 2166 /* Stack values are safe: */
2167 switch (pop2) {
2168 case CXt_LOOP:
a8bba7fa 2169 POPLOOP(cx); /* release loop vars ... */
4fdae800 2170 LEAVE;
f86702cc
PP		 2171 break;
2172 case CXt_SUB:
b0d9ce38 2173 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2174 break;
a0d0e21e 2175 }
3280af22 2176 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2177
b0d9ce38 2178 LEAVESUB(sv);
9d4ba2ae
AL		 2179 PERL_UNUSED_VAR(optype);
2180 PERL_UNUSED_VAR(gimme);
f86702cc 2181 return nextop;
a0d0e21e
LW		 2182}
2183
2184PP(pp_next)
2185{
27da23d5 2186 dVAR;
a0d0e21e 2187 I32 cxix;
c09156bb 2188 register PERL_CONTEXT *cx;
85538317 2189 I32 inner;
a0d0e21e 2190
533c011a 2191 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2192 cxix = dopoptoloop(cxstack_ix);
2193 if (cxix < 0)
a651a37d 2194 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW		 2195 }
2196 else {
2197 cxix = dopoptolabel(cPVOP->op_pv);
2198 if (cxix < 0)
cea2e8a9 2199 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2200 }
2201 if (cxix < cxstack_ix)
2202 dounwind(cxix);
2203
85538317
GS		 2204 /* clear off anything above the scope we're re-entering, but
2205 * save the rest until after a possible continue block */
2206 inner = PL_scopestack_ix;
1ba6ee2b 2207 TOPBLOCK(cx);
85538317
GS		 2208 if (PL_scopestack_ix < inner)
2209 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2210 PL_curcop = cx->blk_oldcop;
022eaa24 2211 return CX_LOOP_NEXTOP_GET(cx);
a0d0e21e
LW		 2212}
2213
2214PP(pp_redo)
2215{
27da23d5 2216 dVAR;
a0d0e21e 2217 I32 cxix;
c09156bb 2218 register PERL_CONTEXT *cx;
a0d0e21e 2219 I32 oldsave;
a034e688 2220 OP* redo_op;
a0d0e21e 2221
533c011a 2222 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2223 cxix = dopoptoloop(cxstack_ix);
2224 if (cxix < 0)
a651a37d 2225 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW		 2226 }
2227 else {
2228 cxix = dopoptolabel(cPVOP->op_pv);
2229 if (cxix < 0)
cea2e8a9 2230 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
a0d0e21e
LW		 2231 }
2232 if (cxix < cxstack_ix)
2233 dounwind(cxix);
2234
022eaa24 2235 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM		 2236 if (redo_op->op_type == OP_ENTER) {
2237 /* pop one less context to avoid $x being freed in while (my $x..) */
2238 cxstack_ix++;
2239 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2240 redo_op = redo_op->op_next;
2241 }
2242
a0d0e21e 2243 TOPBLOCK(cx);
3280af22 2244 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2245 LEAVE_SCOPE(oldsave);
936c78b5 2246 FREETMPS;
3a1b2b9e 2247 PL_curcop = cx->blk_oldcop;
a034e688 2248 return redo_op;
a0d0e21e
LW		 2249}
2250
0824fdcb 2251STATIC OP *
bfed75c6 2252S_dofindlabel(pTHX_ OP *o, const char *label, OP **opstack, OP **oplimit)
a0d0e21e 2253{
97aff369 2254 dVAR;
a0d0e21e 2255 OP **ops = opstack;
bfed75c6 2256 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2257
fc36a67e 2258 if (ops >= oplimit)
cea2e8a9 2259 Perl_croak(aTHX_ too_deep);
11343788
MB		 2260 if (o->op_type == OP_LEAVE ||
2261 o->op_type == OP_SCOPE ||
2262 o->op_type == OP_LEAVELOOP ||
33d34e4c 2263 o->op_type == OP_LEAVESUB ||
11343788 2264 o->op_type == OP_LEAVETRY)
fc36a67e 2265 {
5dc0d613 2266 *ops++ = cUNOPo->op_first;
fc36a67e 2267 if (ops >= oplimit)
cea2e8a9 2268 Perl_croak(aTHX_ too_deep);
fc36a67e 2269 }
c4aa4e48 2270 *ops = 0;
11343788 2271 if (o->op_flags & OPf_KIDS) {
aec46f14 2272 OP *kid;
a0d0e21e 2273 /* First try all the kids at this level, since that's likeliest. */
11343788 2274 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
c4aa4e48
GS		 2275 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
2276 kCOP->cop_label && strEQ(kCOP->cop_label, label))
a0d0e21e
LW		 2277 return kid;
2278 }
11343788 2279 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2280 if (kid == PL_lastgotoprobe)
a0d0e21e 2281 continue;
ed8d0fe2
SM		 2282 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2283 if (ops == opstack)
2284 *ops++ = kid;
2285 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2286 ops[-1]->op_type == OP_DBSTATE)
2287 ops[-1] = kid;
2288 else
2289 *ops++ = kid;
2290 }
155aba94 2291 if ((o = dofindlabel(kid, label, ops, oplimit)))
11343788 2292 return o;
a0d0e21e
LW		 2293 }
2294 }
c4aa4e48 2295 *ops = 0;
a0d0e21e
LW		 2296 return 0;
2297}
2298
a0d0e21e
LW		 2299PP(pp_goto)
2300{
27da23d5 2301 dVAR; dSP;
cbbf8932 2302 OP *retop = NULL;
a0d0e21e 2303 I32 ix;
c09156bb 2304 register PERL_CONTEXT *cx;
fc36a67e
PP		 2305#define GOTO_DEPTH 64
2306 OP *enterops[GOTO_DEPTH];
cbbf8932 2307 const char *label = NULL;
bfed75c6
AL		 2308 const bool do_dump = (PL_op->op_type == OP_DUMP);
2309 static const char must_have_label[] = "goto must have label";
a0d0e21e 2310
533c011a 2311 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2312 SV * const sv = POPs;
a0d0e21e
LW		 2313
2314 /* This egregious kludge implements goto &subroutine */
2315 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2316 I32 cxix;
c09156bb 2317 register PERL_CONTEXT *cx;
a0d0e21e
LW		 2318 CV* cv = (CV*)SvRV(sv);
2319 SV** mark;
2320 I32 items = 0;
2321 I32 oldsave;
b1464ded 2322 bool reified = 0;
a0d0e21e 2323
e8f7dd13 2324 retry:
4aa0a1f7 2325 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2326 const GV * const gv = CvGV(cv);
e8f7dd13 2327 if (gv) {
7fc63493 2328 GV *autogv;
e8f7dd13
GS		 2329 SV *tmpstr;
2330 /* autoloaded stub? */
2331 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2332 goto retry;
2333 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2334 GvNAMELEN(gv), FALSE);
2335 if (autogv && (cv = GvCV(autogv)))
2336 goto retry;
2337 tmpstr = sv_newmortal();
c445ea15 2338 gv_efullname3(tmpstr, gv, NULL);
be2597df 2339 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2340 }
cea2e8a9 2341 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD		 2342 }
2343
a0d0e21e 2344 /* First do some returnish stuff. */
b37c2d43 2345 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2346 FREETMPS;
a0d0e21e
LW		 2347 cxix = dopoptosub(cxstack_ix);
2348 if (cxix < 0)
cea2e8a9 2349 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW		 2350 if (cxix < cxstack_ix)
2351 dounwind(cxix);
2352 TOPBLOCK(cx);
2d43a17f 2353 SPAGAIN;
564abe23 2354 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2355 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89
DM		 2356 if (CxREALEVAL(cx))
2357 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2358 else
2359 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2360 }
9850bf21
RH		 2361 else if (CxMULTICALL(cx))
2362 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
cc8d50a7 2363 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
d8b46c1b 2364 /* put @_ back onto stack */
a0d0e21e 2365 AV* av = cx->blk_sub.argarray;
bfed75c6 2366
93965878 2367 items = AvFILLp(av) + 1;
a45cdc79
DM		 2368 EXTEND(SP, items+1); /* @_ could have been extended. */
2369 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS		 2370 SvREFCNT_dec(GvAV(PL_defgv));
2371 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2372 CLEAR_ARGARRAY(av);
d8b46c1b 2373 /* abandon @_ if it got reified */
62b1ebc2 2374 if (AvREAL(av)) {
b1464ded
DM		 2375 reified = 1;
2376 SvREFCNT_dec(av);
d8b46c1b
GS		 2377 av = newAV();
2378 av_extend(av, items-1);
11ca45c0 2379 AvREIFY_only(av);
dd2155a4 2380 PAD_SVl(0) = (SV*)(cx->blk_sub.argarray = av);
62b1ebc2 2381 }
a0d0e21e 2382 }
aed2304a 2383 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2384 AV* const av = GvAV(PL_defgv);
1fa4e549 2385 items = AvFILLp(av) + 1;
a45cdc79
DM		 2386 EXTEND(SP, items+1); /* @_ could have been extended. */
2387 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2388 }
a45cdc79
DM		 2389 mark = SP;
2390 SP += items;
6b35e009 2391 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2392 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2393 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2394 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW		 2395 LEAVE_SCOPE(oldsave);
2396
2397 /* Now do some callish stuff. */
2398 SAVETMPS;
5023d17a 2399 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2400 if (CvISXSUB(cv)) {
b37c2d43 2401 OP* const retop = cx->blk_sub.retop;
f73ef291
NC		 2402 SV **newsp;
2403 I32 gimme;
b1464ded
DM		 2404 if (reified) {
2405 I32 index;
2406 for (index=0; index<items; index++)
2407 sv_2mortal(SP[-index]);
2408 }
1fa4e549 2409
b37c2d43
AL		 2410 /* XS subs don't have a CxSUB, so pop it */
2411 POPBLOCK(cx, PL_curpm);
2412 /* Push a mark for the start of arglist */
2413 PUSHMARK(mark);
2414 PUTBACK;
2415 (void)(*CvXSUB(cv))(aTHX_ cv);
a0d0e21e 2416 LEAVE;
5eff7df7 2417 return retop;
a0d0e21e
LW		 2418 }
2419 else {
b37c2d43 2420 AV* const padlist = CvPADLIST(cv);
6b35e009 2421 if (CxTYPE(cx) == CXt_EVAL) {
3280af22
NIS		 2422 PL_in_eval = cx->blk_eval.old_in_eval;
2423 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2424 cx->cx_type = CXt_SUB;
cc8d50a7 2425 cx->blk_sub.hasargs = 0;
b150fb22 2426 }
a0d0e21e 2427 cx->blk_sub.cv = cv;
1a5b3db4 2428 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2429
a0d0e21e
LW		 2430 CvDEPTH(cv)++;
2431 if (CvDEPTH(cv) < 2)
74c765eb 2432 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2433 else {
599cee73 2434 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
44a8e56a 2435 sub_crush_depth(cv);
26019298 2436 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2437 }
fd617465
DM		 2438 SAVECOMPPAD();
2439 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
cc8d50a7 2440 if (cx->blk_sub.hasargs)
6d4ff0d2 2441 {
b37c2d43 2442 AV* const av = (AV*)PAD_SVl(0);
a0d0e21e 2443
3280af22 2444 cx->blk_sub.savearray = GvAV(PL_defgv);
b37c2d43 2445 GvAV(PL_defgv) = (AV*)SvREFCNT_inc_simple(av);
dd2155a4 2446 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2447 cx->blk_sub.argarray = av;
a0d0e21e
LW		 2448
2449 if (items >= AvMAX(av) + 1) {
b37c2d43 2450 SV **ary = AvALLOC(av);
a0d0e21e
LW		 2451 if (AvARRAY(av) != ary) {
2452 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2453 AvARRAY(av) = ary;
a0d0e21e
LW		 2454 }
2455 if (items >= AvMAX(av) + 1) {
2456 AvMAX(av) = items - 1;
2457 Renew(ary,items+1,SV*);
2458 AvALLOC(av) = ary;
9c6bc640 2459 AvARRAY(av) = ary;
a0d0e21e
LW		 2460 }
2461 }
a45cdc79 2462 ++mark;
a0d0e21e 2463 Copy(mark,AvARRAY(av),items,SV*);
93965878 2464 AvFILLp(av) = items - 1;
d8b46c1b 2465 assert(!AvREAL(av));
b1464ded
DM		 2466 if (reified) {
2467 /* transfer 'ownership' of refcnts to new @_ */
2468 AvREAL_on(av);
2469 AvREIFY_off(av);
2470 }
a0d0e21e
LW		 2471 while (items--) {
2472 if (*mark)
2473 SvTEMP_off(*mark);
2474 mark++;
2475 }
2476 }
491527d0 2477 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2478 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43
AL		 2479 if (PERLDB_GOTO) {
2480 CV * const gotocv = get_cv("DB::goto", FALSE);
2481 if (gotocv) {
2482 PUSHMARK( PL_stack_sp );
2483 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2484 PL_stack_sp--;
2485 }
491527d0 2486 }
1ce6579f 2487 }
a0d0e21e
LW		 2488 RETURNOP(CvSTART(cv));
2489 }
2490 }
1614b0e3 2491 else {
0510663f 2492 label = SvPV_nolen_const(sv);
1614b0e3 2493 if (!(do_dump || *label))
cea2e8a9 2494 DIE(aTHX_ must_have_label);
1614b0e3 2495 }
a0d0e21e 2496 }
533c011a 2497 else if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 2498 if (! do_dump)
cea2e8a9 2499 DIE(aTHX_ must_have_label);
a0d0e21e
LW		 2500 }
2501 else
2502 label = cPVOP->op_pv;
2503
2504 if (label && *label) {
cbbf8932 2505 OP *gotoprobe = NULL;
3b2447bc 2506 bool leaving_eval = FALSE;
33d34e4c 2507 bool in_block = FALSE;
cbbf8932 2508 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW		 2509
2510 /* find label */
2511
d4c19fe8 2512 PL_lastgotoprobe = NULL;
a0d0e21e
LW		 2513 *enterops = 0;
2514 for (ix = cxstack_ix; ix >= 0; ix--) {
2515 cx = &cxstack[ix];
6b35e009 2516 switch (CxTYPE(cx)) {
a0d0e21e 2517 case CXt_EVAL:
3b2447bc 2518 leaving_eval = TRUE;
971ecbe6 2519 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH		 2520 gotoprobe = (last_eval_cx ?
2521 last_eval_cx->blk_eval.old_eval_root :
2522 PL_eval_root);
2523 last_eval_cx = cx;
9c5794fe
RH		 2524 break;
2525 }
2526 /* else fall through */
a0d0e21e
LW		 2527 case CXt_LOOP:
2528 gotoprobe = cx->blk_oldcop->op_sibling;
2529 break;
2530 case CXt_SUBST:
2531 continue;
2532 case CXt_BLOCK:
33d34e4c 2533 if (ix) {
a0d0e21e 2534 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE		 2535 in_block = TRUE;
2536 } else
3280af22 2537 gotoprobe = PL_main_root;
a0d0e21e 2538 break;
b3933176 2539 case CXt_SUB:
9850bf21 2540 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS		 2541 gotoprobe = CvROOT(cx->blk_sub.cv);
2542 break;
2543 }
2544 /* FALL THROUGH */
7766f137 2545 case CXt_FORMAT:
0a753a76 2546 case CXt_NULL:
a651a37d 2547 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW		 2548 default:
2549 if (ix)
cea2e8a9 2550 DIE(aTHX_ "panic: goto");
3280af22 2551 gotoprobe = PL_main_root;
a0d0e21e
LW		 2552 break;
2553 }
2b597662
GS		 2554 if (gotoprobe) {
2555 retop = dofindlabel(gotoprobe, label,
2556 enterops, enterops + GOTO_DEPTH);
2557 if (retop)
2558 break;
2559 }
3280af22 2560 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW		 2561 }
2562 if (!retop)
cea2e8a9 2563 DIE(aTHX_ "Can't find label %s", label);
a0d0e21e 2564
3b2447bc
RH		 2565 /* if we're leaving an eval, check before we pop any frames
2566 that we're not going to punt, otherwise the error
2567 won't be caught */
2568
2569 if (leaving_eval && *enterops && enterops[1]) {
2570 I32 i;
2571 for (i = 1; enterops[i]; i++)
2572 if (enterops[i]->op_type == OP_ENTERITER)
2573 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
2574 }
2575
a0d0e21e
LW		 2576 /* pop unwanted frames */
2577
2578 if (ix < cxstack_ix) {
2579 I32 oldsave;
2580
2581 if (ix < 0)
2582 ix = 0;
2583 dounwind(ix);
2584 TOPBLOCK(cx);
3280af22 2585 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW		 2586 LEAVE_SCOPE(oldsave);
2587 }
2588
2589 /* push wanted frames */
2590
748a9306 2591 if (*enterops && enterops[1]) {
0bd48802 2592 OP * const oldop = PL_op;
33d34e4c
AE		 2593 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
2594 for (; enterops[ix]; ix++) {
533c011a 2595 PL_op = enterops[ix];
84902520
TB		 2596 /* Eventually we may want to stack the needed arguments
2597 * for each op. For now, we punt on the hard ones. */
533c011a 2598 if (PL_op->op_type == OP_ENTERITER)
894356b3 2599 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
fc0dc3b3 2600 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
a0d0e21e 2601 }
533c011a 2602 PL_op = oldop;
a0d0e21e
LW		 2603 }
2604 }
2605
2606 if (do_dump) {
a5f75d66 2607#ifdef VMS
6b88bc9c 2608 if (!retop) retop = PL_main_start;
a5f75d66 2609#endif
3280af22
NIS		 2610 PL_restartop = retop;
2611 PL_do_undump = TRUE;
a0d0e21e
LW		 2612
2613 my_unexec();
2614
3280af22
NIS		 2615 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2616 PL_do_undump = FALSE;
a0d0e21e
LW		 2617 }
2618
2619 RETURNOP(retop);
2620}
2621
2622PP(pp_exit)
2623{
97aff369 2624 dVAR;
39644a26 2625 dSP;
a0d0e21e
LW		 2626 I32 anum;
2627
2628 if (MAXARG < 1)
2629 anum = 0;
ff0cee69 2630 else {
a0d0e21e 2631 anum = SvIVx(POPs);
d98f61e7
GS		 2632#ifdef VMS
2633 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 2634 anum = 0;
96e176bf 2635 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69
PP		 2636#endif
2637 }
cc3604b1 2638 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC		 2639#ifdef PERL_MAD
2640 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
2641 if (anum || !(PL_minus_c && PL_madskills))
2642 my_exit(anum);
2643#else
a0d0e21e 2644 my_exit(anum);
81d86705 2645#endif
3280af22 2646 PUSHs(&PL_sv_undef);
a0d0e21e
LW		 2647 RETURN;
2648}
2649
a0d0e21e
LW		 2650/* Eval. */
2651
0824fdcb 2652STATIC void
cea2e8a9 2653S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 2654{
504618e9 2655 const char *s = SvPVX_const(sv);
890ce7af 2656 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 2657 I32 line = 1;
a0d0e21e
LW		 2658
2659 while (s && s < send) {
f54cb97a 2660 const char *t;
561b68a9 2661 SV * const tmpstr = newSV(0);
a0d0e21e
LW		 2662
2663 sv_upgrade(tmpstr, SVt_PVMG);
2664 t = strchr(s, '\n');
2665 if (t)
2666 t++;
2667 else
2668 t = send;
2669
2670 sv_setpvn(tmpstr, s, t - s);
2671 av_store(array, line++, tmpstr);
2672 s = t;
2673 }
2674}
2675
901017d6 2676STATIC void
14dd3ad8
GS		 2677S_docatch_body(pTHX)
2678{
97aff369 2679 dVAR;
cea2e8a9 2680 CALLRUNOPS(aTHX);
901017d6 2681 return;
312caa8e
CS		 2682}
2683
0824fdcb 2684STATIC OP *
cea2e8a9 2685S_docatch(pTHX_ OP *o)
1e422769 2686{
97aff369 2687 dVAR;
6224f72b 2688 int ret;
06b5626a 2689 OP * const oldop = PL_op;
db36c5a1 2690 dJMPENV;
1e422769 2691
1e422769 2692#ifdef DEBUGGING
54310121 2693 assert(CATCH_GET == TRUE);
1e422769 2694#endif
312caa8e 2695 PL_op = o;
8bffa5f8 2696
14dd3ad8 2697 JMPENV_PUSH(ret);
6224f72b 2698 switch (ret) {
312caa8e 2699 case 0:
abd70938
DM		 2700 assert(cxstack_ix >= 0);
2701 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2702 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8
GS		 2703 redo_body:
2704 docatch_body();
312caa8e
CS		 2705 break;
2706 case 3:
8bffa5f8 2707 /* die caught by an inner eval - continue inner loop */
abd70938
DM		 2708
2709 /* NB XXX we rely on the old popped CxEVAL still being at the top
2710 * of the stack; the way die_where() currently works, this
2711 * assumption is valid. In theory The cur_top_env value should be
2712 * returned in another global, the way retop (aka PL_restartop)
2713 * is. */
2714 assert(CxTYPE(&cxstack[cxstack_ix+1]) == CXt_EVAL);
2715
2716 if (PL_restartop
2717 && cxstack[cxstack_ix+1].blk_eval.cur_top_env == PL_top_env)
2718 {
312caa8e
CS		 2719 PL_op = PL_restartop;
2720 PL_restartop = 0;
2721 goto redo_body;
2722 }
2723 /* FALL THROUGH */
2724 default:
14dd3ad8 2725 JMPENV_POP;
533c011a 2726 PL_op = oldop;
6224f72b 2727 JMPENV_JUMP(ret);
1e422769 2728 /* NOTREACHED */
1e422769 2729 }
14dd3ad8 2730 JMPENV_POP;
533c011a 2731 PL_op = oldop;
5f66b61c 2732 return NULL;
1e422769
PP		 2733}
2734
c277df42 2735OP *
bfed75c6 2736Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, const char *code, PAD** padp)
c277df42
IZ		 2737/* sv Text to convert to OP tree. */
2738/* startop op_free() this to undo. */
2739/* code Short string id of the caller. */
2740{
f7997f86 2741 /* FIXME - how much of this code is common with pp_entereval? */
27da23d5 2742 dVAR; dSP; /* Make POPBLOCK work. */
c277df42
IZ		 2743 PERL_CONTEXT *cx;
2744 SV **newsp;
b094c71d 2745 I32 gimme = G_VOID;
c277df42
IZ		 2746 I32 optype;
2747 OP dummy;
155aba94 2748 OP *rop;
83ee9e09
GS		 2749 char tbuf[TYPE_DIGITS(long) + 12 + 10];
2750 char *tmpbuf = tbuf;
c277df42 2751 char *safestr;
a3985cdc 2752 int runtime;
601f1833 2753 CV* runcv = NULL; /* initialise to avoid compiler warnings */
f7997f86 2754 STRLEN len;
c277df42
IZ		 2755
2756 ENTER;
2757 lex_start(sv);
2758 SAVETMPS;
2759 /* switch to eval mode */
2760
923e4eb5 2761 if (IN_PERL_COMPILETIME) {
f4dd75d9 2762 SAVECOPSTASH_FREE(&PL_compiling);
11faa288 2763 CopSTASH_set(&PL_compiling, PL_curstash);
cbce877f 2764 }
83ee9e09 2765 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
9d4ba2ae 2766 SV * const sv = sv_newmortal();
83ee9e09
GS		 2767 Perl_sv_setpvf(aTHX_ sv, "_<(%.10seval %lu)[%s:%"IVdf"]",
2768 code, (unsigned long)++PL_evalseq,
2769 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
2770 tmpbuf = SvPVX(sv);
fc009855 2771 len = SvCUR(sv);
83ee9e09
GS		 2772 }
2773 else
d9fad198
JH		 2774 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(%.10s_eval %lu)", code,
2775 (unsigned long)++PL_evalseq);
f4dd75d9 2776 SAVECOPFILE_FREE(&PL_compiling);
57843af0 2777 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 2778 SAVECOPLINE(&PL_compiling);
57843af0 2779 CopLINE_set(&PL_compiling, 1);
c277df42
IZ		 2780 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2781 deleting the eval's FILEGV from the stash before gv_check() runs
2782 (i.e. before run-time proper). To work around the coredump that
2783 ensues, we always turn GvMULTI_on for any globals that were
2784 introduced within evals. See force_ident(). GSAR 96-10-12 */
f7997f86
NC		 2785 safestr = savepvn(tmpbuf, len);
2786 SAVEDELETE(PL_defstash, safestr, len);
b3ac6de7 2787 SAVEHINTS();
d1ca3daa 2788#ifdef OP_IN_REGISTER
6b88bc9c 2789 PL_opsave = op;
d1ca3daa 2790#else
7766f137 2791 SAVEVPTR(PL_op);
d1ca3daa 2792#endif
c277df42 2793
a3985cdc 2794 /* we get here either during compilation, or via pp_regcomp at runtime */
923e4eb5 2795 runtime = IN_PERL_RUNTIME;
a3985cdc 2796 if (runtime)
d819b83a 2797 runcv = find_runcv(NULL);
a3985cdc 2798
533c011a 2799 PL_op = &dummy;
13b51b79 2800 PL_op->op_type = OP_ENTEREVAL;
533c011a 2801 PL_op->op_flags = 0; /* Avoid uninit warning. */
923e4eb5 2802 PUSHBLOCK(cx, CXt_EVAL|(IN_PERL_COMPILETIME ? 0 : CXp_REAL), SP);
a0714e2c 2803 PUSHEVAL(cx, 0, NULL);
a3985cdc
DM		 2804
2805 if (runtime)
2806 rop = doeval(G_SCALAR, startop, runcv, PL_curcop->cop_seq);
2807 else
2808 rop = doeval(G_SCALAR, startop, PL_compcv, PL_cop_seqmax);
13b51b79 2809 POPBLOCK(cx,PL_curpm);
e84b9f1f 2810 POPEVAL(cx);
c277df42
IZ		 2811
2812 (*startop)->op_type = OP_NULL;
22c35a8c 2813 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
c277df42 2814 lex_end();
f3548bdc 2815 /* XXX DAPM do this properly one year */
b37c2d43 2816 *padp = (AV*)SvREFCNT_inc_simple(PL_comppad);
c277df42 2817 LEAVE;
923e4eb5 2818 if (IN_PERL_COMPILETIME)
623e6609 2819 CopHINTS_set(&PL_compiling, PL_hints);
d1ca3daa 2820#ifdef OP_IN_REGISTER
6b88bc9c 2821 op = PL_opsave;
d1ca3daa 2822#endif
9d4ba2ae
AL		 2823 PERL_UNUSED_VAR(newsp);
2824 PERL_UNUSED_VAR(optype);
2825
c277df42
IZ		 2826 return rop;
2827}
2828
a3985cdc
DM		 2829
2830/*
2831=for apidoc find_runcv
2832
2833Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM		 2834If db_seqp is non_null, skip CVs that are in the DB package and populate
2835*db_seqp with the cop sequence number at the point that the DB:: code was
2836entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 2837than in the scope of the debugger itself).
a3985cdc
DM		 2838
2839=cut
2840*/
2841
2842CV*
d819b83a 2843Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 2844{
97aff369 2845 dVAR;
a3985cdc 2846 PERL_SI *si;
a3985cdc 2847
d819b83a
DM		 2848 if (db_seqp)
2849 *db_seqp = PL_curcop->cop_seq;
a3985cdc 2850 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 2851 I32 ix;
a3985cdc 2852 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 2853 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 2854 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 2855 CV * const cv = cx->blk_sub.cv;
d819b83a
DM		 2856 /* skip DB:: code */
2857 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
2858 *db_seqp = cx->blk_oldcop->cop_seq;
2859 continue;
2860 }
2861 return cv;
2862 }
a3985cdc
DM		 2863 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
2864 return PL_compcv;
2865 }
2866 }
2867 return PL_main_cv;
2868}
2869
2870
2871/* Compile a require/do, an eval '', or a /(?{...})/.
2872 * In the last case, startop is non-null, and contains the address of
2873 * a pointer that should be set to the just-compiled code.
2874 * outside is the lexically enclosing CV (if any) that invoked us.
2875 */
2876
0824fdcb 2877STATIC OP *
a3985cdc 2878S_doeval(pTHX_ int gimme, OP** startop, CV* outside, U32 seq)
a0d0e21e 2879{
27da23d5 2880 dVAR; dSP;
46c461b5 2881 OP * const saveop = PL_op;
a0d0e21e 2882
6dc8a9e4
IZ		 2883 PL_in_eval = ((saveop && saveop->op_type == OP_REQUIRE)
2884 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
2885 : EVAL_INEVAL);
a0d0e21e 2886
1ce6579f
PP		 2887 PUSHMARK(SP);
2888
3280af22 2889 SAVESPTR(PL_compcv);
561b68a9 2890 PL_compcv = (CV*)newSV(0);
3280af22 2891 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
1aff0e91 2892 CvEVAL_on(PL_compcv);
2090ab20
JH		 2893 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
2894 cxstack[cxstack_ix].blk_eval.cv = PL_compcv;
2895
a3985cdc 2896 CvOUTSIDE_SEQ(PL_compcv) = seq;
b37c2d43 2897 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc_simple(outside);
a3985cdc 2898
dd2155a4 2899 /* set up a scratch pad */
a0d0e21e 2900
dd2155a4 2901 CvPADLIST(PL_compcv) = pad_new(padnew_SAVE);
cecbe010 2902 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 2903
07055b4c 2904
81d86705
NC		 2905 if (!PL_madskills)
2906 SAVEMORTALIZESV(PL_compcv); /* must remain until end of current statement */
748a9306 2907
a0d0e21e
LW		 2908 /* make sure we compile in the right package */
2909
ed094faf 2910 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
3280af22 2911 SAVESPTR(PL_curstash);
ed094faf 2912 PL_curstash = CopSTASH(PL_curcop);
a0d0e21e 2913 }
3c10abe3 2914 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS		 2915 SAVESPTR(PL_beginav);
2916 PL_beginav = newAV();
2917 SAVEFREESV(PL_beginav);
3c10abe3
AG		 2918 SAVESPTR(PL_unitcheckav);
2919 PL_unitcheckav = newAV();
2920 SAVEFREESV(PL_unitcheckav);
24944567 2921 SAVEI32(PL_error_count);
a0d0e21e 2922
81d86705
NC		 2923#ifdef PERL_MAD
2924 SAVEI32(PL_madskills);
2925 PL_madskills = 0;
2926#endif
2927
a0d0e21e
LW		 2928 /* try to compile it */
2929
5f66b61c 2930 PL_eval_root = NULL;
3280af22
NIS		 2931 PL_error_count = 0;
2932 PL_curcop = &PL_compiling;
fc15ae8f 2933 CopARYBASE_set(PL_curcop, 0);
5f66b61c 2934 if (saveop && (saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 2935 PL_in_eval |= EVAL_KEEPERR;
1ce6579f 2936 else
c69006e4 2937 sv_setpvn(ERRSV,"",0);
3280af22 2938 if (yyparse() || PL_error_count || !PL_eval_root) {
0c58d367 2939 SV **newsp; /* Used by POPBLOCK. */
9d4ba2ae 2940 PERL_CONTEXT *cx = &cxstack[cxstack_ix];
c277df42 2941 I32 optype = 0; /* Might be reset by POPEVAL. */
9d4ba2ae 2942 const char *msg;
bfed75c6 2943
533c011a 2944 PL_op = saveop;
3280af22
NIS		 2945 if (PL_eval_root) {
2946 op_free(PL_eval_root);
5f66b61c 2947 PL_eval_root = NULL;
a0d0e21e 2948 }
3280af22 2949 SP = PL_stack_base + POPMARK; /* pop original mark */
c277df42 2950 if (!startop) {
3280af22 2951 POPBLOCK(cx,PL_curpm);
c277df42 2952 POPEVAL(cx);
c277df42 2953 }
a0d0e21e
LW		 2954 lex_end();
2955 LEAVE;
9d4ba2ae
AL		 2956
2957 msg = SvPVx_nolen_const(ERRSV);
7a2e2cd6 2958 if (optype == OP_REQUIRE) {
b464bac0 2959 const SV * const nsv = cx->blk_eval.old_namesv;
504618e9 2960 (void)hv_store(GvHVn(PL_incgv), SvPVX_const(nsv), SvCUR(nsv),
27bcc0a7 2961 &PL_sv_undef, 0);
5a844595
GS		 2962 DIE(aTHX_ "%sCompilation failed in require",
2963 *msg ? msg : "Unknown error\n");
2964 }
2965 else if (startop) {
3280af22 2966 POPBLOCK(cx,PL_curpm);
c277df42 2967 POPEVAL(cx);
5a844595
GS		 2968 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2969 (*msg ? msg : "Unknown error\n"));
7a2e2cd6 2970 }
9d7f88dd 2971 else {
9d7f88dd 2972 if (!*msg) {
6502358f 2973 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR		 2974 }
2975 }
9d4ba2ae 2976 PERL_UNUSED_VAR(newsp);
a0d0e21e
LW		 2977 RETPUSHUNDEF;
2978 }
57843af0 2979 CopLINE_set(&PL_compiling, 0);
c277df42 2980 if (startop) {
3280af22 2981 *startop = PL_eval_root;
c277df42 2982 } else
3280af22 2983 SAVEFREEOP(PL_eval_root);
0c58d367
RGS		 2984
2985 /* Set the context for this new optree.
2986 * If the last op is an OP_REQUIRE, force scalar context.
2987 * Otherwise, propagate the context from the eval(). */
2988 if (PL_eval_root->op_type == OP_LEAVEEVAL
2989 && cUNOPx(PL_eval_root)->op_first->op_type == OP_LINESEQ
2990 && cLISTOPx(cUNOPx(PL_eval_root)->op_first)->op_last->op_type
2991 == OP_REQUIRE)
2992 scalar(PL_eval_root);
2993 else if (gimme & G_VOID)
3280af22 2994 scalarvoid(PL_eval_root);
54310121 2995 else if (gimme & G_ARRAY)
3280af22 2996 list(PL_eval_root);
a0d0e21e 2997 else
3280af22 2998 scalar(PL_eval_root);
a0d0e21e
LW		 2999
3000 DEBUG_x(dump_eval());
3001
55497cff 3002 /* Register with debugger: */
6482a30d 3003 if (PERLDB_INTER && saveop && saveop->op_type == OP_REQUIRE) {
890ce7af 3004 CV * const cv = get_cv("DB::postponed", FALSE);
55497cff
PP		 3005 if (cv) {
3006 dSP;
924508f0 3007 PUSHMARK(SP);
cc49e20b 3008 XPUSHs((SV*)CopFILEGV(&PL_compiling));
55497cff 3009 PUTBACK;
864dbfa3 3010 call_sv((SV*)cv, G_DISCARD);
55497cff
PP		 3011 }
3012 }
3013
3c10abe3
AG		 3014 if (PL_unitcheckav)
3015 call_list(PL_scopestack_ix, PL_unitcheckav);
3016
a0d0e21e
LW		 3017 /* compiled okay, so do it */
3018
3280af22
NIS		 3019 CvDEPTH(PL_compcv) = 1;
3020 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3021 PL_op = saveop; /* The caller may need it. */
6dc8a9e4 3022 PL_lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3023
3280af22 3024 RETURNOP(PL_eval_start);
a0d0e21e
LW		 3025}
3026
a6c40364 3027STATIC PerlIO *
74d5ed12 3028S_check_type_and_open(pTHX_ const char *name, const char *mode)
ce8abf5f
SP		 3029{
3030 Stat_t st;
c445ea15 3031 const int st_rc = PerlLIO_stat(name, &st);
df528165 3032
6b845e56 3033 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3034 return NULL;
ce8abf5f
SP		 3035 }
3036
ce8abf5f
SP		 3037 return PerlIO_open(name, mode);
3038}
3039
3040STATIC PerlIO *
7925835c 3041S_doopen_pm(pTHX_ const char *name, const char *mode)
b295d113 3042{
7925835c 3043#ifndef PERL_DISABLE_PMC
f54cb97a 3044 const STRLEN namelen = strlen(name);
b295d113
TH		 3045 PerlIO *fp;
3046
7894fbab 3047 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
9d4ba2ae 3048 SV * const pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
349d4f2f 3049 const char * const pmc = SvPV_nolen_const(pmcsv);
a6c40364
GS		 3050 Stat_t pmcstat;
3051 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
85e8f315 3052 fp = check_type_and_open(name, mode);
a6c40364
GS		 3053 }
3054 else {
a91233bf 3055 fp = check_type_and_open(pmc, mode);
b295d113 3056 }
a6c40364
GS		 3057 SvREFCNT_dec(pmcsv);
3058 }
3059 else {
85e8f315 3060 fp = check_type_and_open(name, mode);
b295d113 3061 }
b295d113 3062 return fp;
7925835c 3063#else
85e8f315 3064 return check_type_and_open(name, mode);
7925835c 3065#endif /* !PERL_DISABLE_PMC */
b295d113
TH		 3066}
3067
a0d0e21e
LW		 3068PP(pp_require)
3069{
27da23d5 3070 dVAR; dSP;
c09156bb 3071 register PERL_CONTEXT *cx;
a0d0e21e 3072 SV *sv;
5c144d81 3073 const char *name;
6132ea6c 3074 STRLEN len;
c445ea15
AL		 3075 const char *tryname = NULL;
3076 SV *namesv = NULL;
f54cb97a 3077 const I32 gimme = GIMME_V;
bbed91b5 3078 int filter_has_file = 0;
c445ea15 3079 PerlIO *tryrsfp = NULL;
34113e50 3080 SV *filter_cache = NULL;
c445ea15
AL		 3081 SV *filter_state = NULL;
3082 SV *filter_sub = NULL;
3083 SV *hook_sv = NULL;
6ec9efec
JH		 3084 SV *encoding;
3085 OP *op;
a0d0e21e
LW		 3086
3087 sv = POPs;
d7aa5382
JP		 3088 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
3089 if ( SvVOK(sv) && ckWARN(WARN_PORTABLE) ) /* require v5.6.1 */
9014280d 3090 Perl_warner(aTHX_ packWARN(WARN_PORTABLE),
e3407aba 3091 "v-string in use/require non-portable");
d7aa5382
JP		 3092
3093 sv = new_version(sv);
3094 if (!sv_derived_from(PL_patchlevel, "version"))
2593c6c6 3095 upg_version(PL_patchlevel);
149c1637 3096 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3097 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3098 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
be2597df 3099 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647
RGS		 3100 }
3101 else {
3102 if ( vcmp(sv,PL_patchlevel) > 0 )
3103 DIE(aTHX_ "Perl %"SVf" required--this is only %"SVf", stopped",
be2597df 3104 SVfARG(vnormal(sv)), SVfARG(vnormal(PL_patchlevel)));
468aa647 3105 }
d7aa5382 3106
4305d8ab 3107 RETPUSHYES;
a0d0e21e 3108 }
5c144d81 3109 name = SvPV_const(sv, len);
6132ea6c 3110 if (!(name && len > 0 && *name))
cea2e8a9 3111 DIE(aTHX_ "Null filename used");
4633a7c4 3112 TAINT_PROPER("require");
44f8325f 3113 if (PL_op->op_type == OP_REQUIRE) {
0bd48802 3114 SV * const * const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
44f8325f
AL		 3115 if ( svp ) {
3116 if (*svp != &PL_sv_undef)
3117 RETPUSHYES;
3118 else
3119 DIE(aTHX_ "Compilation failed in require");
3120 }
4d8b06f1 3121 }
a0d0e21e
LW		 3122
3123 /* prepare to compile file */
3124
be4b629d 3125 if (path_is_absolute(name)) {
46fc3d4c 3126 tryname = name;
7925835c 3127 tryrsfp = doopen_pm(name,PERL_SCRIPT_MODE);
bf4acbe4 3128 }
67627c52
JH		 3129#ifdef MACOS_TRADITIONAL
3130 if (!tryrsfp) {
3131 char newname[256];
3132
3133 MacPerl_CanonDir(name, newname, 1);
3134 if (path_is_absolute(newname)) {
3135 tryname = newname;
7925835c 3136 tryrsfp = doopen_pm(newname,PERL_SCRIPT_MODE);
67627c52
JH		 3137 }
3138 }
3139#endif
be4b629d 3140 if (!tryrsfp) {
44f8325f 3141 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3142 I32 i;
748a9306 3143#ifdef VMS
46fc3d4c 3144 char *unixname;
c445ea15 3145 if ((unixname = tounixspec(name, NULL)) != NULL)
46fc3d4c
PP		 3146#endif
3147 {
561b68a9 3148 namesv = newSV(0);
46fc3d4c 3149 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3150 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3151
c38a6530
RD		 3152 if (SvTIED_mg((SV*)ar, PERL_MAGIC_tied))
3153 mg_get(dirsv);
bbed91b5
KF		 3154 if (SvROK(dirsv)) {
3155 int count;
a3b58a99 3156 SV **svp;
bbed91b5
KF		 3157 SV *loader = dirsv;
3158
e14e2dc8
NC		 3159 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3160 && !sv_isobject(loader))
3161 {
bbed91b5
KF		 3162 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
3163 }
3164
b900a521 3165 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3166 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3167 tryname = SvPVX_const(namesv);
c445ea15 3168 tryrsfp = NULL;
bbed91b5
KF		 3169
3170 ENTER;
3171 SAVETMPS;
3172 EXTEND(SP, 2);
3173
3174 PUSHMARK(SP);
3175 PUSHs(dirsv);
3176 PUSHs(sv);
3177 PUTBACK;
e982885c
NC		 3178 if (sv_isobject(loader))
3179 count = call_method("INC", G_ARRAY);
3180 else
3181 count = call_sv(loader, G_ARRAY);
bbed91b5
KF		 3182 SPAGAIN;
3183
a3b58a99
RGS		 3184 /* Adjust file name if the hook has set an %INC entry */
3185 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3186 if (svp)
3187 tryname = SvPVX_const(*svp);
3188
bbed91b5
KF		 3189 if (count > 0) {
3190 int i = 0;
3191 SV *arg;
3192
3193 SP -= count - 1;
3194 arg = SP[i++];
3195
34113e50
NC		 3196 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3197 && !isGV_with_GP(SvRV(arg))) {
3198 filter_cache = SvRV(arg);
74c765eb 3199 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC		 3200
3201 if (i < count) {
3202 arg = SP[i++];
3203 }
3204 }
3205
bbed91b5
KF		 3206 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
3207 arg = SvRV(arg);
3208 }
3209
3210 if (SvTYPE(arg) == SVt_PVGV) {
df528165 3211 IO * const io = GvIO((GV *)arg);
bbed91b5
KF		 3212
3213 ++filter_has_file;
3214
3215 if (io) {
3216 tryrsfp = IoIFP(io);
0f7de14d
NC		 3217 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3218 PerlIO_close(IoOFP(io));
bbed91b5 3219 }
0f7de14d
NC		 3220 IoIFP(io) = NULL;
3221 IoOFP(io) = NULL;
bbed91b5
KF		 3222 }
3223
3224 if (i < count) {
3225 arg = SP[i++];
3226 }
3227 }
3228
3229 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3230 filter_sub = arg;
74c765eb 3231 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF		 3232
3233 if (i < count) {
3234 filter_state = SP[i];
b37c2d43 3235 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3236 }
34113e50 3237 }
bbed91b5 3238
34113e50
NC		 3239 if (!tryrsfp && (filter_cache || filter_sub)) {
3240 tryrsfp = PerlIO_open(BIT_BUCKET,
3241 PERL_SCRIPT_MODE);
bbed91b5 3242 }
1d06aecd 3243 SP--;
bbed91b5
KF		 3244 }
3245
3246 PUTBACK;
3247 FREETMPS;
3248 LEAVE;
3249
3250 if (tryrsfp) {
89ccab8c 3251 hook_sv = dirsv;
bbed91b5
KF		 3252 break;
3253 }
3254
3255 filter_has_file = 0;
34113e50
NC		 3256 if (filter_cache) {
3257 SvREFCNT_dec(filter_cache);
3258 filter_cache = NULL;
3259 }
bbed91b5
KF		 3260 if (filter_state) {
3261 SvREFCNT_dec(filter_state);
c445ea15 3262 filter_state = NULL;
bbed91b5
KF		 3263 }
3264 if (filter_sub) {
3265 SvREFCNT_dec(filter_sub);
c445ea15 3266 filter_sub = NULL;
bbed91b5
KF		 3267 }
3268 }
3269 else {
be4b629d
CN		 3270 if (!path_is_absolute(name)
3271#ifdef MACOS_TRADITIONAL
3272 /* We consider paths of the form :a:b ambiguous and interpret them first
3273 as global then as local
3274 */
3275 || (*name == ':' && name[1] != ':' && strchr(name+2, ':'))
3276#endif
3277 ) {
0510663f 3278 const char *dir = SvPVx_nolen_const(dirsv);
bf4acbe4 3279#ifdef MACOS_TRADITIONAL
67627c52
JH		 3280 char buf1[256];
3281 char buf2[256];
3282
3283 MacPerl_CanonDir(name, buf2, 1);
3284 Perl_sv_setpvf(aTHX_ namesv, "%s%s", MacPerl_CanonDir(dir, buf1, 0), buf2+(buf2[0] == ':'));
bf4acbe4 3285#else
27da23d5 3286# ifdef VMS
bbed91b5 3287 char *unixdir;
c445ea15 3288 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF		 3289 continue;
3290 sv_setpv(namesv, unixdir);
3291 sv_catpv(namesv, unixname);
27da23d5 3292# else
a0fd4948 3293# ifdef __SYMBIAN32__
27da23d5
JH		 3294 if (PL_origfilename[0] &&
3295 PL_origfilename[1] == ':' &&
3296 !(dir[0] && dir[1] == ':'))
3297 Perl_sv_setpvf(aTHX_ namesv,
3298 "%c:%s\\%s",
3299 PL_origfilename[0],
3300 dir, name);
3301 else
3302 Perl_sv_setpvf(aTHX_ namesv,
3303 "%s\\%s",
3304 dir, name);
3305# else
bbed91b5 3306 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
27da23d5
JH		 3307# endif
3308# endif
bf4acbe4 3309#endif
bbed91b5 3310 TAINT_PROPER("require");
349d4f2f 3311 tryname = SvPVX_const(namesv);
7925835c 3312 tryrsfp = doopen_pm(tryname, PERL_SCRIPT_MODE);
bbed91b5
KF		 3313 if (tryrsfp) {
3314 if (tryname[0] == '.' && tryname[1] == '/')
3315 tryname += 2;
3316 break;
3317 }
ff806af2
DM		 3318 else if (errno == EMFILE)
3319 /* no point in trying other paths if out of handles */
3320 break;
be4b629d 3321 }
46fc3d4c 3322 }
a0d0e21e
LW		 3323 }
3324 }
3325 }
f4dd75d9 3326 SAVECOPFILE_FREE(&PL_compiling);
57843af0 3327 CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
46fc3d4c 3328 SvREFCNT_dec(namesv);
a0d0e21e 3329 if (!tryrsfp) {
533c011a 3330 if (PL_op->op_type == OP_REQUIRE) {
5c144d81 3331 const char *msgstr = name;
e31de809 3332 if(errno == EMFILE) {
b9b739dc
NC		 3333 SV * const msg
3334 = sv_2mortal(Perl_newSVpvf(aTHX_ "%s: %s", msgstr,
3335 Strerror(errno)));
349d4f2f 3336 msgstr = SvPV_nolen_const(msg);
e31de809
SP		 3337 } else {
3338 if (namesv) { /* did we lookup @INC? */
44f8325f 3339 AV * const ar = GvAVn(PL_incgv);
e31de809 3340 I32 i;
b8f04b1b
NC		 3341 SV * const msg = sv_2mortal(Perl_newSVpvf(aTHX_
3342 "%s in @INC%s%s (@INC contains:",
3343 msgstr,
3344 (instr(msgstr, ".h ")
3345 ? " (change .h to .ph maybe?)" : ""),
3346 (instr(msgstr, ".ph ")
3347 ? " (did you run h2ph?)" : "")
3348 ));
3349
e31de809 3350 for (i = 0; i <= AvFILL(ar); i++) {
396482e1 3351 sv_catpvs(msg, " ");
b8f04b1b 3352 sv_catsv(msg, *av_fetch(ar, i, TRUE));
e31de809 3353 }
396482e1 3354 sv_catpvs(msg, ")");
e31de809
SP		 3355 msgstr = SvPV_nolen_const(msg);
3356 }
2683423c 3357 }
ea071790 3358 DIE(aTHX_ "Can't locate %s", msgstr);
a0d0e21e
LW		 3359 }
3360
3361 RETPUSHUNDEF;
3362 }
d8bfb8bd 3363 else
93189314 3364 SETERRNO(0, SS_NORMAL);
a0d0e21e
LW		 3365
3366 /* Assume success here to prevent recursive requirement. */
238d24b4 3367 /* name is never assigned to again, so len is still strlen(name) */
d3a4e64e 3368 /* Check whether a hook in @INC has already filled %INC */
44f8325f
AL		 3369 if (!hook_sv) {
3370 (void)hv_store(GvHVn(PL_incgv), name, len, newSVpv(CopFILE(&PL_compiling),0),0);
3371 } else {
3372 SV** const svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3373 if (!svp)
b37c2d43 3374 (void)hv_store(GvHVn(PL_incgv), name, len, SvREFCNT_inc_simple(hook_sv), 0 );
d3a4e64e 3375 }
a0d0e21e
LW		 3376
3377 ENTER;
3378 SAVETMPS;
10efb74f 3379 lex_start(NULL);
b9d12d37 3380 SAVEGENERICSV(PL_rsfp_filters);
7d49f689 3381 PL_rsfp_filters = NULL;
e50aee73 3382
3280af22 3383 PL_rsfp = tryrsfp;
b3ac6de7 3384 SAVEHINTS();
3280af22 3385 PL_hints = 0;
68da3b2f 3386 SAVECOMPILEWARNINGS();
0453d815 3387 if (PL_dowarn & G_WARN_ALL_ON)
d3a7d8c7 3388 PL_compiling.cop_warnings = pWARN_ALL ;
0453d815 3389 else if (PL_dowarn & G_WARN_ALL_OFF)
d3a7d8c7 3390 PL_compiling.cop_warnings = pWARN_NONE ;
ac27b0f5 3391 else
d3a7d8c7 3392 PL_compiling.cop_warnings = pWARN_STD ;
a0d0e21e 3393
34113e50 3394 if (filter_sub || filter_cache) {
c445ea15 3395 SV * const datasv = filter_add(S_run_user_filter, NULL);
bbed91b5 3396 IoLINES(datasv) = filter_has_file;
bbed91b5
KF		 3397 IoTOP_GV(datasv) = (GV *)filter_state;
3398 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
34113e50 3399 IoFMT_GV(datasv) = (GV *)filter_cache;
bbed91b5
KF		 3400 }
3401
3402 /* switch to eval mode */
a0d0e21e 3403 PUSHBLOCK(cx, CXt_EVAL, SP);
a0714e2c 3404 PUSHEVAL(cx, name, NULL);
f39bc417 3405 cx->blk_eval.retop = PL_op->op_next;
a0d0e21e 3406
57843af0
GS		 3407 SAVECOPLINE(&PL_compiling);
3408 CopLINE_set(&PL_compiling, 0);
a0d0e21e
LW