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[perl5.git] / pp_ctl.c
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a0d0e21e
LW		 1/* pp_ctl.c
2 *
1129b882
NC		 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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/*
4ac71550
TC		 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 * [Bilbo on p.35 of _The Lord of the Rings_, I/i: "A Long-Expected Party"]
a0d0e21e
LW		 20 */
21
166f8a29
DM		 22/* This file contains control-oriented pp ("push/pop") functions that
23 * execute the opcodes that make up a perl program. A typical pp function
24 * expects to find its arguments on the stack, and usually pushes its
25 * results onto the stack, hence the 'pp' terminology. Each OP structure
26 * contains a pointer to the relevant pp_foo() function.
27 *
28 * Control-oriented means things like pp_enteriter() and pp_next(), which
29 * alter the flow of control of the program.
30 */
31
32
a0d0e21e 33#include "EXTERN.h"
864dbfa3 34#define PERL_IN_PP_CTL_C
a0d0e21e
LW		 35#include "perl.h"
36
54310121 37#define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
1e422769 38
94fcd414
NC		 39#define dopoptosub(plop) dopoptosub_at(cxstack, (plop))
40
a0d0e21e
LW		 41PP(pp_wantarray)
42{
97aff369 43 dVAR;
39644a26 44 dSP;
a0d0e21e 45 I32 cxix;
93f0bc49 46 const PERL_CONTEXT *cx;
a0d0e21e
LW		 47 EXTEND(SP, 1);
48
93f0bc49
FC		 49 if (PL_op->op_private & OPpOFFBYONE) {
50 if (!(cx = caller_cx(1,NULL))) RETPUSHUNDEF;
51 }
52 else {
53 cxix = dopoptosub(cxstack_ix);
54 if (cxix < 0)
a0d0e21e 55 RETPUSHUNDEF;
93f0bc49
FC		 56 cx = &cxstack[cxix];
57 }
a0d0e21e 58
93f0bc49 59 switch (cx->blk_gimme) {
54310121 60 case G_ARRAY:
a0d0e21e 61 RETPUSHYES;
54310121 62 case G_SCALAR:
a0d0e21e 63 RETPUSHNO;
54310121 64 default:
65 RETPUSHUNDEF;
66 }
a0d0e21e
LW		 67}
68
2cd61cdb
IZ		 69PP(pp_regcreset)
70{
97aff369 71 dVAR;
0b4182de 72 TAINT_NOT;
2cd61cdb
IZ		 73 return NORMAL;
74}
75
b3eb6a9b
GS		 76PP(pp_regcomp)
77{
97aff369 78 dVAR;
39644a26 79 dSP;
a0d0e21e 80 register PMOP *pm = (PMOP*)cLOGOP->op_other;
9f141731 81 SV **args;
df787a7b 82 int nargs;
84679df5 83 REGEXP *re = NULL;
9f141731
DM		 84 REGEXP *new_re;
85 const regexp_engine *eng;
76ac488f 86 bool is_bare_re;
bfed75c6 87
df787a7b
DM		 88 if (PL_op->op_flags & OPf_STACKED) {
89 dMARK;
90 nargs = SP - MARK;
91 args = ++MARK;
92 }
93 else {
94 nargs = 1;
95 args = SP;
96 }
97
4b5a0d1c 98 /* prevent recompiling under /o and ithreads. */
3db8f154 99#if defined(USE_ITHREADS)
131b3ad0 100 if (pm->op_pmflags & PMf_KEEP && PM_GETRE(pm)) {
df787a7b 101 SP = args-1;
131b3ad0
DM		 102 RETURN;
103 }
513629ba 104#endif
d4b87e75 105
9f141731
DM		 106 re = PM_GETRE(pm);
107 assert (re != (REGEXP*) &PL_sv_undef);
108 eng = re ? RX_ENGINE(re) : current_re_engine();
109
3c13cae6
DM		 110 new_re = (eng->op_comp
111 ? eng->op_comp
112 : &Perl_re_op_compile
113 )(aTHX_ args, nargs, pm->op_code_list, eng, re,
346d3070 114 &is_bare_re,
514a91f1 115 (pm->op_pmflags & RXf_PMf_COMPILETIME),
a5ae69f0
DM		 116 pm->op_pmflags |
117 (PL_op->op_flags & OPf_SPECIAL ? PMf_USE_RE_EVAL : 0));
346d3070 118 if (pm->op_pmflags & PMf_HAS_CV)
9ef2bcf6 119 ((struct regexp *)SvANY(new_re))->qr_anoncv
9fe3265f 120 = (CV*) SvREFCNT_inc(PAD_SV(PL_op->op_targ));
9f141731
DM		 121
122 if (is_bare_re) {
123 REGEXP *tmp;
124 /* The match's LHS's get-magic might need to access this op's regexp
125 (e.g. $' =~ /$re/ while foo; see bug 70764). So we must call
126 get-magic now before we replace the regexp. Hopefully this hack can
127 be replaced with the approach described at
128 http://www.nntp.perl.org/group/perl.perl5.porters/2007/03/msg122415.html
129 some day. */
130 if (pm->op_type == OP_MATCH) {
131 SV *lhs;
132 const bool was_tainted = PL_tainted;
133 if (pm->op_flags & OPf_STACKED)
134 lhs = args[-1];
135 else if (pm->op_private & OPpTARGET_MY)
136 lhs = PAD_SV(pm->op_targ);
137 else lhs = DEFSV;
138 SvGETMAGIC(lhs);
139 /* Restore the previous value of PL_tainted (which may have been
140 modified by get-magic), to avoid incorrectly setting the
141 RXf_TAINTED flag further down. */
142 PL_tainted = was_tainted;
df787a7b 143 }
9f141731
DM		 144 tmp = reg_temp_copy(NULL, new_re);
145 ReREFCNT_dec(new_re);
146 new_re = tmp;
df787a7b 147 }
9f141731
DM		 148 if (re != new_re) {
149 ReREFCNT_dec(re);
150 PM_SETRE(pm, new_re);
c277df42 151 }
d4b87e75 152
72311751 153#ifndef INCOMPLETE_TAINTS
9f141731
DM		 154 if (PL_tainting && PL_tainted) {
155 SvTAINTED_on((SV*)new_re);
156 RX_EXTFLAGS(new_re) |= RXf_TAINTED;
72311751
GS		 157 }
158#endif
159
c737faaf
YO		 160#if !defined(USE_ITHREADS)
161 /* can't change the optree at runtime either */
162 /* PMf_KEEP is handled differently under threads to avoid these problems */
9f141731
DM		 163 if (!RX_PRELEN(PM_GETRE(pm)) && PL_curpm)
164 pm = PL_curpm;
a0d0e21e 165 if (pm->op_pmflags & PMf_KEEP) {
c90c0ff4 166 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
533c011a 167 cLOGOP->op_first->op_next = PL_op->op_next;
a0d0e21e 168 }
c737faaf 169#endif
9f141731 170
df787a7b 171 SP = args-1;
a0d0e21e
LW		 172 RETURN;
173}
174
9f141731 175
a0d0e21e
LW		 176PP(pp_substcont)
177{
97aff369 178 dVAR;
39644a26 179 dSP;
c09156bb 180 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
901017d6
AL		 181 register PMOP * const pm = (PMOP*) cLOGOP->op_other;
182 register SV * const dstr = cx->sb_dstr;
a0d0e21e
LW		 183 register char *s = cx->sb_s;
184 register char *m = cx->sb_m;
185 char *orig = cx->sb_orig;
901017d6 186 register REGEXP * const rx = cx->sb_rx;
c445ea15 187 SV *nsv = NULL;
988e6e7e 188 REGEXP *old = PM_GETRE(pm);
f410a211
NC		 189
190 PERL_ASYNC_CHECK();
191
988e6e7e 192 if(old != rx) {
bfed75c6 193 if(old)
988e6e7e 194 ReREFCNT_dec(old);
d6106309 195 PM_SETRE(pm,ReREFCNT_inc(rx));
d8f2cf8a
AB		 196 }
197
d9f97599 198 rxres_restore(&cx->sb_rxres, rx);
01b35787 199 RX_MATCH_UTF8_set(rx, DO_UTF8(cx->sb_targ));
c90c0ff4 200
a0d0e21e 201 if (cx->sb_iters++) {
a3b680e6 202 const I32 saviters = cx->sb_iters;
a0d0e21e 203 if (cx->sb_iters > cx->sb_maxiters)
cea2e8a9 204 DIE(aTHX_ "Substitution loop");
a0d0e21e 205
447ee134
DM		 206 SvGETMAGIC(TOPs); /* possibly clear taint on $1 etc: #67962 */
207
ef07e810 208 /* See "how taint works" above pp_subst() */
20be6587
DM		 209 if (SvTAINTED(TOPs))
210 cx->sb_rxtainted |= SUBST_TAINT_REPL;
447ee134 211 sv_catsv_nomg(dstr, POPs);
2c296965
YO		 212 /* XXX: adjust for positive offsets of \G for instance s/(.)\G//g with positive pos() */
213 s -= RX_GOFS(rx);
a0d0e21e
LW		 214
215 /* Are we done */
2c296965
YO		 216 if (CxONCE(cx) || s < orig ||
217 !CALLREGEXEC(rx, s, cx->sb_strend, orig,
218 (s == m) + RX_GOFS(rx), cx->sb_targ, NULL,
219 ((cx->sb_rflags & REXEC_COPY_STR)
220 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
221 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
a0d0e21e 222 {
8ca8a454 223 SV *targ = cx->sb_targ;
748a9306 224
078c425b
JH		 225 assert(cx->sb_strend >= s);
226 if(cx->sb_strend > s) {
227 if (DO_UTF8(dstr) && !SvUTF8(targ))
228 sv_catpvn_utf8_upgrade(dstr, s, cx->sb_strend - s, nsv);
229 else
230 sv_catpvn(dstr, s, cx->sb_strend - s);
231 }
20be6587
DM		 232 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
233 cx->sb_rxtainted |= SUBST_TAINT_PAT;
9212bbba 234
8ca8a454
NC		 235 if (pm->op_pmflags & PMf_NONDESTRUCT) {
236 PUSHs(dstr);
237 /* From here on down we're using the copy, and leaving the
238 original untouched. */
239 targ = dstr;
240 }
241 else {
8ca8a454
NC		 242 if (SvIsCOW(targ)) {
243 sv_force_normal_flags(targ, SV_COW_DROP_PV);
244 } else
8ca8a454
NC		 245 {
246 SvPV_free(targ);
247 }
248 SvPV_set(targ, SvPVX(dstr));
249 SvCUR_set(targ, SvCUR(dstr));
250 SvLEN_set(targ, SvLEN(dstr));
251 if (DO_UTF8(dstr))
252 SvUTF8_on(targ);
253 SvPV_set(dstr, NULL);
254
4f4d7508 255 mPUSHi(saviters - 1);
48c036b1 256
8ca8a454
NC		 257 (void)SvPOK_only_UTF8(targ);
258 }
5cd24f17 259
20be6587 260 /* update the taint state of various various variables in
ef07e810
DM		 261 * preparation for final exit.
262 * See "how taint works" above pp_subst() */
20be6587
DM		 263 if (PL_tainting) {
264 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
265 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
266 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
267 )
268 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
269
270 if (!(cx->sb_rxtainted & SUBST_TAINT_BOOLRET)
271 && (cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_PAT))
272 )
273 SvTAINTED_on(TOPs); /* taint return value */
274 /* needed for mg_set below */
275 PL_tainted = cBOOL(cx->sb_rxtainted &
276 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL));
277 SvTAINT(TARG);
278 }
279 /* PL_tainted must be correctly set for this mg_set */
280 SvSETMAGIC(TARG);
281 TAINT_NOT;
4633a7c4 282 LEAVE_SCOPE(cx->sb_oldsave);
a0d0e21e
LW		 283 POPSUBST(cx);
284 RETURNOP(pm->op_next);
118e2215 285 assert(0); /* NOTREACHED */
a0d0e21e 286 }
8e5e9ebe 287 cx->sb_iters = saviters;
a0d0e21e 288 }
07bc277f 289 if (RX_MATCH_COPIED(rx) && RX_SUBBEG(rx) != orig) {
a0d0e21e
LW		 290 m = s;
291 s = orig;
07bc277f 292 cx->sb_orig = orig = RX_SUBBEG(rx);
a0d0e21e
LW		 293 s = orig + (m - s);
294 cx->sb_strend = s + (cx->sb_strend - m);
295 }
07bc277f 296 cx->sb_m = m = RX_OFFS(rx)[0].start + orig;
db79b45b 297 if (m > s) {
bfed75c6 298 if (DO_UTF8(dstr) && !SvUTF8(cx->sb_targ))
db79b45b
JH		 299 sv_catpvn_utf8_upgrade(dstr, s, m - s, nsv);
300 else
301 sv_catpvn(dstr, s, m-s);
302 }
07bc277f 303 cx->sb_s = RX_OFFS(rx)[0].end + orig;
084916e3 304 { /* Update the pos() information. */
8ca8a454
NC		 305 SV * const sv
306 = (pm->op_pmflags & PMf_NONDESTRUCT) ? cx->sb_dstr : cx->sb_targ;
084916e3 307 MAGIC *mg;
7a7f3e45 308 SvUPGRADE(sv, SVt_PVMG);
14befaf4 309 if (!(mg = mg_find(sv, PERL_MAGIC_regex_global))) {
d83f0a82 310#ifdef PERL_OLD_COPY_ON_WRITE
51a9ea20 311 if (SvIsCOW(sv))
d83f0a82
NC		 312 sv_force_normal_flags(sv, 0);
313#endif
314 mg = sv_magicext(sv, NULL, PERL_MAGIC_regex_global, &PL_vtbl_mglob,
315 NULL, 0);
084916e3 316 }
ce474962 317 mg->mg_len = m - orig;
084916e3 318 }
988e6e7e 319 if (old != rx)
d6106309 320 (void)ReREFCNT_inc(rx);
20be6587 321 /* update the taint state of various various variables in preparation
ef07e810
DM		 322 * for calling the code block.
323 * See "how taint works" above pp_subst() */
20be6587
DM		 324 if (PL_tainting) {
325 if (RX_MATCH_TAINTED(rx)) /* run time pattern taint, eg locale */
326 cx->sb_rxtainted |= SUBST_TAINT_PAT;
327
328 if ((cx->sb_rxtainted & SUBST_TAINT_PAT) ||
329 ((cx->sb_rxtainted & (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
330 == (SUBST_TAINT_STR|SUBST_TAINT_RETAINT))
331 )
332 (RX_MATCH_TAINTED_on(rx)); /* taint $1 et al */
333
334 if (cx->sb_iters > 1 && (cx->sb_rxtainted &
335 (SUBST_TAINT_STR|SUBST_TAINT_PAT|SUBST_TAINT_REPL)))
8ca8a454
NC		 336 SvTAINTED_on((pm->op_pmflags & PMf_NONDESTRUCT)
337 ? cx->sb_dstr : cx->sb_targ);
20be6587
DM		 338 TAINT_NOT;
339 }
d9f97599 340 rxres_save(&cx->sb_rxres, rx);
af9838cc 341 PL_curpm = pm;
29f2e912 342 RETURNOP(pm->op_pmstashstartu.op_pmreplstart);
a0d0e21e
LW		 343}
344
c90c0ff4 345void
864dbfa3 346Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 347{
348 UV *p = (UV*)*rsp;
349 U32 i;
7918f24d
NC		 350
351 PERL_ARGS_ASSERT_RXRES_SAVE;
96a5add6 352 PERL_UNUSED_CONTEXT;
c90c0ff4 353
07bc277f 354 if (!p || p[1] < RX_NPARENS(rx)) {
f8c7b90f 355#ifdef PERL_OLD_COPY_ON_WRITE
07bc277f 356 i = 7 + RX_NPARENS(rx) * 2;
ed252734 357#else
07bc277f 358 i = 6 + RX_NPARENS(rx) * 2;
ed252734 359#endif
c90c0ff4 360 if (!p)
a02a5408 361 Newx(p, i, UV);
c90c0ff4 362 else
363 Renew(p, i, UV);
364 *rsp = (void*)p;
365 }
366
07bc277f 367 *p++ = PTR2UV(RX_MATCH_COPIED(rx) ? RX_SUBBEG(rx) : NULL);
cf93c79d 368 RX_MATCH_COPIED_off(rx);
c90c0ff4 369
f8c7b90f 370#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC		 371 *p++ = PTR2UV(RX_SAVED_COPY(rx));
372 RX_SAVED_COPY(rx) = NULL;
ed252734
NC		 373#endif
374
07bc277f 375 *p++ = RX_NPARENS(rx);
c90c0ff4 376
07bc277f
NC		 377 *p++ = PTR2UV(RX_SUBBEG(rx));
378 *p++ = (UV)RX_SUBLEN(rx);
379 for (i = 0; i <= RX_NPARENS(rx); ++i) {
380 *p++ = (UV)RX_OFFS(rx)[i].start;
381 *p++ = (UV)RX_OFFS(rx)[i].end;
c90c0ff4 382 }
383}
384
9c105995
NC		 385static void
386S_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
c90c0ff4 387{
388 UV *p = (UV*)*rsp;
389 U32 i;
7918f24d
NC		 390
391 PERL_ARGS_ASSERT_RXRES_RESTORE;
96a5add6 392 PERL_UNUSED_CONTEXT;
c90c0ff4 393
ed252734 394 RX_MATCH_COPY_FREE(rx);
cf93c79d 395 RX_MATCH_COPIED_set(rx, *p);
c90c0ff4 396 *p++ = 0;
397
f8c7b90f 398#ifdef PERL_OLD_COPY_ON_WRITE
bdd9a1b1
NC		 399 if (RX_SAVED_COPY(rx))
400 SvREFCNT_dec (RX_SAVED_COPY(rx));
401 RX_SAVED_COPY(rx) = INT2PTR(SV*,*p);
ed252734
NC		 402 *p++ = 0;
403#endif
404
07bc277f 405 RX_NPARENS(rx) = *p++;
c90c0ff4 406
07bc277f
NC		 407 RX_SUBBEG(rx) = INT2PTR(char*,*p++);
408 RX_SUBLEN(rx) = (I32)(*p++);
409 for (i = 0; i <= RX_NPARENS(rx); ++i) {
410 RX_OFFS(rx)[i].start = (I32)(*p++);
411 RX_OFFS(rx)[i].end = (I32)(*p++);
c90c0ff4 412 }
413}
414
9c105995
NC		 415static void
416S_rxres_free(pTHX_ void **rsp)
c90c0ff4 417{
44f8325f 418 UV * const p = (UV*)*rsp;
7918f24d
NC		 419
420 PERL_ARGS_ASSERT_RXRES_FREE;
96a5add6 421 PERL_UNUSED_CONTEXT;
c90c0ff4 422
423 if (p) {
94010e71
NC		 424#ifdef PERL_POISON
425 void *tmp = INT2PTR(char*,*p);
426 Safefree(tmp);
427 if (*p)
7e337ee0 428 PoisonFree(*p, 1, sizeof(*p));
94010e71 429#else
56431972 430 Safefree(INT2PTR(char*,*p));
94010e71 431#endif
f8c7b90f 432#ifdef PERL_OLD_COPY_ON_WRITE
ed252734
NC		 433 if (p[1]) {
434 SvREFCNT_dec (INT2PTR(SV*,p[1]));
435 }
436#endif
c90c0ff4 437 Safefree(p);
4608196e 438 *rsp = NULL;
c90c0ff4 439 }
440}
441
a701009a
DM		 442#define FORM_NUM_BLANK (1<<30)
443#define FORM_NUM_POINT (1<<29)
444
a0d0e21e
LW		 445PP(pp_formline)
446{
97aff369 447 dVAR; dSP; dMARK; dORIGMARK;
823a54a3 448 register SV * const tmpForm = *++MARK;
086b26f3
DM		 449 SV *formsv; /* contains text of original format */
450 register U32 *fpc; /* format ops program counter */
451 register char *t; /* current append position in target string */
452 const char *f; /* current position in format string */
a0d0e21e 453 register I32 arg;
086b26f3
DM		 454 register SV *sv = NULL; /* current item */
455 const char *item = NULL;/* string value of current item */
456 I32 itemsize = 0; /* length of current item, possibly truncated */
457 I32 fieldsize = 0; /* width of current field */
458 I32 lines = 0; /* number of lines that have been output */
459 bool chopspace = (strchr(PL_chopset, ' ') != NULL); /* does $: have space */
460 const char *chophere = NULL; /* where to chop current item */
f5ada144 461 STRLEN linemark = 0; /* pos of start of line in output */
65202027 462 NV value;
086b26f3 463 bool gotsome = FALSE; /* seen at least one non-blank item on this line */
a0d0e21e 464 STRLEN len;
26e935cf 465 STRLEN linemax; /* estimate of output size in bytes */
1bd51a4c
IH		 466 bool item_is_utf8 = FALSE;
467 bool targ_is_utf8 = FALSE;
bfed75c6 468 const char *fmt;
74e0ddf7 469 MAGIC *mg = NULL;
4ff700b9
DM		 470 U8 *source; /* source of bytes to append */
471 STRLEN to_copy; /* how may bytes to append */
ea60cfe8 472 char trans; /* what chars to translate */
74e0ddf7 473
3808a683 474 mg = doparseform(tmpForm);
a0d0e21e 475
74e0ddf7 476 fpc = (U32*)mg->mg_ptr;
3808a683
DM		 477 /* the actual string the format was compiled from.
478 * with overload etc, this may not match tmpForm */
479 formsv = mg->mg_obj;
480
74e0ddf7 481
3280af22 482 SvPV_force(PL_formtarget, len);
3808a683 483 if (SvTAINTED(tmpForm) || SvTAINTED(formsv))
125b9982 484 SvTAINTED_on(PL_formtarget);
1bd51a4c
IH		 485 if (DO_UTF8(PL_formtarget))
486 targ_is_utf8 = TRUE;
26e935cf
DM		 487 linemax = (SvCUR(formsv) * (IN_BYTES ? 1 : 3) + 1);
488 t = SvGROW(PL_formtarget, len + linemax + 1);
489 /* XXX from now onwards, SvCUR(PL_formtarget) is invalid */
a0d0e21e 490 t += len;
3808a683 491 f = SvPV_const(formsv, len);
a0d0e21e
LW		 492
493 for (;;) {
494 DEBUG_f( {
bfed75c6 495 const char *name = "???";
a0d0e21e
LW		 496 arg = -1;
497 switch (*fpc) {
498 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
499 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
500 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
501 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
502 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
503
504 case FF_CHECKNL: name = "CHECKNL"; break;
505 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
506 case FF_SPACE: name = "SPACE"; break;
507 case FF_HALFSPACE: name = "HALFSPACE"; break;
508 case FF_ITEM: name = "ITEM"; break;
509 case FF_CHOP: name = "CHOP"; break;
510 case FF_LINEGLOB: name = "LINEGLOB"; break;
511 case FF_NEWLINE: name = "NEWLINE"; break;
512 case FF_MORE: name = "MORE"; break;
513 case FF_LINEMARK: name = "LINEMARK"; break;
514 case FF_END: name = "END"; break;
bfed75c6 515 case FF_0DECIMAL: name = "0DECIMAL"; break;
a1b95068 516 case FF_LINESNGL: name = "LINESNGL"; break;
a0d0e21e
LW		 517 }
518 if (arg >= 0)
bf49b057 519 PerlIO_printf(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
a0d0e21e 520 else
bf49b057 521 PerlIO_printf(Perl_debug_log, "%-16s\n", name);
5f80b19c 522 } );
a0d0e21e
LW		 523 switch (*fpc++) {
524 case FF_LINEMARK:
f5ada144 525 linemark = t - SvPVX(PL_formtarget);
a0d0e21e
LW		 526 lines++;
527 gotsome = FALSE;
528 break;
529
530 case FF_LITERAL:
ea60cfe8
DM		 531 to_copy = *fpc++;
532 source = (U8 *)f;
533 f += to_copy;
534 trans = '~';
75645721 535 item_is_utf8 = targ_is_utf8 ? !!DO_UTF8(formsv) : !!SvUTF8(formsv);
ea60cfe8 536 goto append;
a0d0e21e
LW		 537
538 case FF_SKIP:
539 f += *fpc++;
540 break;
541
542 case FF_FETCH:
543 arg = *fpc++;
544 f += arg;
545 fieldsize = arg;
546
547 if (MARK < SP)
548 sv = *++MARK;
549 else {
3280af22 550 sv = &PL_sv_no;
a2a5de95 551 Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Not enough format arguments");
a0d0e21e 552 }
125b9982
NT		 553 if (SvTAINTED(sv))
554 SvTAINTED_on(PL_formtarget);
a0d0e21e
LW		 555 break;
556
557 case FF_CHECKNL:
5a34cab7
NC		 558 {
559 const char *send;
560 const char *s = item = SvPV_const(sv, len);
561 itemsize = len;
562 if (DO_UTF8(sv)) {
563 itemsize = sv_len_utf8(sv);
564 if (itemsize != (I32)len) {
565 I32 itembytes;
566 if (itemsize > fieldsize) {
567 itemsize = fieldsize;
568 itembytes = itemsize;
569 sv_pos_u2b(sv, &itembytes, 0);
570 }
571 else
572 itembytes = len;
573 send = chophere = s + itembytes;
574 while (s < send) {
575 if (*s & ~31)
576 gotsome = TRUE;
577 else if (*s == '\n')
578 break;
579 s++;
580 }
581 item_is_utf8 = TRUE;
582 itemsize = s - item;
583 sv_pos_b2u(sv, &itemsize);
584 break;
a0ed51b3 585 }
a0ed51b3 586 }
5a34cab7
NC		 587 item_is_utf8 = FALSE;
588 if (itemsize > fieldsize)
589 itemsize = fieldsize;
590 send = chophere = s + itemsize;
591 while (s < send) {
592 if (*s & ~31)
593 gotsome = TRUE;
594 else if (*s == '\n')
595 break;
596 s++;
597 }
598 itemsize = s - item;
599 break;
a0ed51b3 600 }
a0d0e21e
LW		 601
602 case FF_CHECKCHOP:
5a34cab7
NC		 603 {
604 const char *s = item = SvPV_const(sv, len);
605 itemsize = len;
606 if (DO_UTF8(sv)) {
607 itemsize = sv_len_utf8(sv);
608 if (itemsize != (I32)len) {
609 I32 itembytes;
610 if (itemsize <= fieldsize) {
611 const char *send = chophere = s + itemsize;
612 while (s < send) {
613 if (*s == '\r') {
614 itemsize = s - item;
a0ed51b3 615 chophere = s;
a0ed51b3 616 break;
5a34cab7
NC		 617 }
618 if (*s++ & ~31)
a0ed51b3 619 gotsome = TRUE;
a0ed51b3 620 }
a0ed51b3 621 }
5a34cab7
NC		 622 else {
623 const char *send;
624 itemsize = fieldsize;
625 itembytes = itemsize;
626 sv_pos_u2b(sv, &itembytes, 0);
627 send = chophere = s + itembytes;
628 while (s < send || (s == send && isSPACE(*s))) {
629 if (isSPACE(*s)) {
630 if (chopspace)
631 chophere = s;
632 if (*s == '\r')
633 break;
634 }
635 else {
636 if (*s & ~31)
637 gotsome = TRUE;
638 if (strchr(PL_chopset, *s))
639 chophere = s + 1;
640 }
641 s++;
642 }
643 itemsize = chophere - item;
644 sv_pos_b2u(sv, &itemsize);
645 }
646 item_is_utf8 = TRUE;
a0d0e21e
LW		 647 break;
648 }
a0d0e21e 649 }
5a34cab7
NC		 650 item_is_utf8 = FALSE;
651 if (itemsize <= fieldsize) {
652 const char *const send = chophere = s + itemsize;
653 while (s < send) {
654 if (*s == '\r') {
655 itemsize = s - item;
a0d0e21e 656 chophere = s;
a0d0e21e 657 break;
5a34cab7
NC		 658 }
659 if (*s++ & ~31)
a0d0e21e 660 gotsome = TRUE;
a0d0e21e 661 }
a0d0e21e 662 }
5a34cab7
NC		 663 else {
664 const char *send;
665 itemsize = fieldsize;
666 send = chophere = s + itemsize;
667 while (s < send || (s == send && isSPACE(*s))) {
668 if (isSPACE(*s)) {
669 if (chopspace)
670 chophere = s;
671 if (*s == '\r')
672 break;
673 }
674 else {
675 if (*s & ~31)
676 gotsome = TRUE;
677 if (strchr(PL_chopset, *s))
678 chophere = s + 1;
679 }
680 s++;
681 }
682 itemsize = chophere - item;
683 }
684 break;
a0d0e21e 685 }
a0d0e21e
LW		 686
687 case FF_SPACE:
688 arg = fieldsize - itemsize;
689 if (arg) {
690 fieldsize -= arg;
691 while (arg-- > 0)
692 *t++ = ' ';
693 }
694 break;
695
696 case FF_HALFSPACE:
697 arg = fieldsize - itemsize;
698 if (arg) {
699 arg /= 2;
700 fieldsize -= arg;
701 while (arg-- > 0)
702 *t++ = ' ';
703 }
704 break;
705
706 case FF_ITEM:
8aa7beb6
DM		 707 to_copy = itemsize;
708 source = (U8 *)item;
709 trans = 1;
710 if (item_is_utf8) {
711 /* convert to_copy from chars to bytes */
712 U8 *s = source;
713 while (to_copy--)
714 s += UTF8SKIP(s);
715 to_copy = s - source;
a0d0e21e 716 }
8aa7beb6 717 goto append;
a0d0e21e
LW		 718
719 case FF_CHOP:
5a34cab7
NC		 720 {
721 const char *s = chophere;
722 if (chopspace) {
af68e756 723 while (isSPACE(*s))
5a34cab7
NC		 724 s++;
725 }
726 sv_chop(sv,s);
727 SvSETMAGIC(sv);
728 break;
a0d0e21e 729 }
a0d0e21e 730
a1b95068
WL		 731 case FF_LINESNGL:
732 chopspace = 0;
a0d0e21e 733 case FF_LINEGLOB:
5a34cab7 734 {
e32383e2 735 const bool oneline = fpc[-1] == FF_LINESNGL;
5a34cab7 736 const char *s = item = SvPV_const(sv, len);
7440a75b 737 const char *const send = s + len;
7440a75b 738
f3f2f1a3 739 item_is_utf8 = DO_UTF8(sv);
a1137ee5 740 if (!len)
7440a75b 741 break;
ea60cfe8 742 trans = 0;
0d21cefe 743 gotsome = TRUE;
a1137ee5 744 chophere = s + len;
4ff700b9
DM		 745 source = (U8 *) s;
746 to_copy = len;
0d21cefe
DM		 747 while (s < send) {
748 if (*s++ == '\n') {
749 if (oneline) {
750 to_copy = s - SvPVX_const(sv) - 1;
751 chophere = s;
752 break;
753 } else {
754 if (s == send) {
0d21cefe
DM		 755 to_copy--;
756 } else
757 lines++;
1bd51a4c 758 }
a0d0e21e 759 }
0d21cefe 760 }
a2c0032b
DM		 761 }
762
ea60cfe8
DM		 763 append:
764 /* append to_copy bytes from source to PL_formstring.
765 * item_is_utf8 implies source is utf8.
766 * if trans, translate certain characters during the copy */
a2c0032b
DM		 767 {
768 U8 *tmp = NULL;
26e935cf 769 STRLEN grow = 0;
0325ce87
DM		 770
771 SvCUR_set(PL_formtarget,
772 t - SvPVX_const(PL_formtarget));
773
0d21cefe
DM		 774 if (targ_is_utf8 && !item_is_utf8) {
775 source = tmp = bytes_to_utf8(source, &to_copy);
0d21cefe
DM		 776 } else {
777 if (item_is_utf8 && !targ_is_utf8) {
f5ada144 778 U8 *s;
0d21cefe 779 /* Upgrade targ to UTF8, and then we reduce it to
0325ce87
DM		 780 a problem we have a simple solution for.
781 Don't need get magic. */
0d21cefe 782 sv_utf8_upgrade_nomg(PL_formtarget);
0325ce87 783 targ_is_utf8 = TRUE;
f5ada144
DM		 784 /* re-calculate linemark */
785 s = (U8*)SvPVX(PL_formtarget);
26e935cf
DM		 786 /* the bytes we initially allocated to append the
787 * whole line may have been gobbled up during the
788 * upgrade, so allocate a whole new line's worth
789 * for safety */
790 grow = linemax;
f5ada144
DM		 791 while (linemark--)
792 s += UTF8SKIP(s);
793 linemark = s - (U8*)SvPVX(PL_formtarget);
e8e72d41 794 }
0d21cefe
DM		 795 /* Easy. They agree. */
796 assert (item_is_utf8 == targ_is_utf8);
797 }
26e935cf
DM		 798 if (!trans)
799 /* @* and ^* are the only things that can exceed
800 * the linemax, so grow by the output size, plus
801 * a whole new form's worth in case of any further
802 * output */
803 grow = linemax + to_copy;
804 if (grow)
805 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + grow + 1);
0d21cefe
DM		 806 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
807
808 Copy(source, t, to_copy, char);
ea60cfe8 809 if (trans) {
8aa7beb6
DM		 810 /* blank out ~ or control chars, depending on trans.
811 * works on bytes not chars, so relies on not
812 * matching utf8 continuation bytes */
ea60cfe8
DM		 813 U8 *s = (U8*)t;
814 U8 *send = s + to_copy;
815 while (s < send) {
8aa7beb6
DM		 816 const int ch = *s;
817 if (trans == '~' ? (ch == '~') :
818#ifdef EBCDIC
819 iscntrl(ch)
820#else
821 (!(ch & ~31))
822#endif
823 )
ea60cfe8
DM		 824 *s = ' ';
825 s++;
826 }
827 }
828
0d21cefe
DM		 829 t += to_copy;
830 SvCUR_set(PL_formtarget, SvCUR(PL_formtarget) + to_copy);
a1137ee5 831 if (tmp)
0d21cefe 832 Safefree(tmp);
5a34cab7 833 break;
a0d0e21e 834 }
a0d0e21e 835
a1b95068
WL		 836 case FF_0DECIMAL:
837 arg = *fpc++;
838#if defined(USE_LONG_DOUBLE)
10edeb5d 839 fmt = (const char *)
a701009a 840 ((arg & FORM_NUM_POINT) ?
10edeb5d 841 "%#0*.*" PERL_PRIfldbl : "%0*.*" PERL_PRIfldbl);
a1b95068 842#else
10edeb5d 843 fmt = (const char *)
a701009a 844 ((arg & FORM_NUM_POINT) ?
10edeb5d 845 "%#0*.*f" : "%0*.*f");
a1b95068
WL		 846#endif
847 goto ff_dec;
a0d0e21e 848 case FF_DECIMAL:
a0d0e21e 849 arg = *fpc++;
65202027 850#if defined(USE_LONG_DOUBLE)
10edeb5d 851 fmt = (const char *)
a701009a 852 ((arg & FORM_NUM_POINT) ? "%#*.*" PERL_PRIfldbl : "%*.*" PERL_PRIfldbl);
65202027 853#else
10edeb5d 854 fmt = (const char *)
a701009a 855 ((arg & FORM_NUM_POINT) ? "%#*.*f" : "%*.*f");
65202027 856#endif
a1b95068 857 ff_dec:
784707d5
JP		 858 /* If the field is marked with ^ and the value is undefined,
859 blank it out. */
a701009a 860 if ((arg & FORM_NUM_BLANK) && !SvOK(sv)) {
784707d5
JP		 861 arg = fieldsize;
862 while (arg--)
863 *t++ = ' ';
864 break;
865 }
866 gotsome = TRUE;
867 value = SvNV(sv);
a1b95068 868 /* overflow evidence */
bfed75c6 869 if (num_overflow(value, fieldsize, arg)) {
a1b95068
WL		 870 arg = fieldsize;
871 while (arg--)
872 *t++ = '#';
873 break;
874 }
784707d5
JP		 875 /* Formats aren't yet marked for locales, so assume "yes". */
876 {
877 STORE_NUMERIC_STANDARD_SET_LOCAL();
a701009a
DM		 878 arg &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
879 my_snprintf(t, SvLEN(PL_formtarget) - (t - SvPVX(PL_formtarget)), fmt, (int) fieldsize, (int) arg, value);
784707d5
JP		 880 RESTORE_NUMERIC_STANDARD();
881 }
882 t += fieldsize;
883 break;
a1b95068 884
a0d0e21e
LW		 885 case FF_NEWLINE:
886 f++;
f5ada144 887 while (t-- > (SvPVX(PL_formtarget) + linemark) && *t == ' ') ;
a0d0e21e
LW		 888 t++;
889 *t++ = '\n';
890 break;
891
892 case FF_BLANK:
893 arg = *fpc++;
894 if (gotsome) {
895 if (arg) { /* repeat until fields exhausted? */
11f9eeaf
DM		 896 fpc--;
897 goto end;
a0d0e21e
LW		 898 }
899 }
900 else {
f5ada144 901 t = SvPVX(PL_formtarget) + linemark;
a0d0e21e
LW		 902 lines--;
903 }
904 break;
905
906 case FF_MORE:
5a34cab7
NC		 907 {
908 const char *s = chophere;
909 const char *send = item + len;
910 if (chopspace) {
af68e756 911 while (isSPACE(*s) && (s < send))
5a34cab7 912 s++;
a0d0e21e 913 }
5a34cab7
NC		 914 if (s < send) {
915 char *s1;
916 arg = fieldsize - itemsize;
917 if (arg) {
918 fieldsize -= arg;
919 while (arg-- > 0)
920 *t++ = ' ';
921 }
922 s1 = t - 3;
923 if (strnEQ(s1," ",3)) {
924 while (s1 > SvPVX_const(PL_formtarget) && isSPACE(s1[-1]))
925 s1--;
926 }
927 *s1++ = '.';
928 *s1++ = '.';
929 *s1++ = '.';
a0d0e21e 930 }
5a34cab7 931 break;
a0d0e21e 932 }
a0d0e21e 933 case FF_END:
11f9eeaf 934 end:
bf2bec63 935 assert(t < SvPVX_const(PL_formtarget) + SvLEN(PL_formtarget));
a0d0e21e 936 *t = '\0';
b15aece3 937 SvCUR_set(PL_formtarget, t - SvPVX_const(PL_formtarget));
1bd51a4c
IH		 938 if (targ_is_utf8)
939 SvUTF8_on(PL_formtarget);
3280af22 940 FmLINES(PL_formtarget) += lines;
a0d0e21e 941 SP = ORIGMARK;
11f9eeaf
DM		 942 if (fpc[-1] == FF_BLANK)
943 RETURNOP(cLISTOP->op_first);
944 else
945 RETPUSHYES;
a0d0e21e
LW		 946 }
947 }
948}
949
950PP(pp_grepstart)
951{
27da23d5 952 dVAR; dSP;
a0d0e21e
LW		 953 SV *src;
954
3280af22 955 if (PL_stack_base + *PL_markstack_ptr == SP) {
a0d0e21e 956 (void)POPMARK;
54310121 957 if (GIMME_V == G_SCALAR)
6e449a3a 958 mXPUSHi(0);
533c011a 959 RETURNOP(PL_op->op_next->op_next);
a0d0e21e 960 }
3280af22 961 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
897d3989
NC		 962 Perl_pp_pushmark(aTHX); /* push dst */
963 Perl_pp_pushmark(aTHX); /* push src */
d343c3ef 964 ENTER_with_name("grep"); /* enter outer scope */
a0d0e21e
LW		 965
966 SAVETMPS;
59f00321
RGS		 967 if (PL_op->op_private & OPpGREP_LEX)
968 SAVESPTR(PAD_SVl(PL_op->op_targ));
969 else
970 SAVE_DEFSV;
d343c3ef 971 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 972 SAVEVPTR(PL_curpm);
a0d0e21e 973
3280af22 974 src = PL_stack_base[*PL_markstack_ptr];
a0d0e21e 975 SvTEMP_off(src);
59f00321
RGS		 976 if (PL_op->op_private & OPpGREP_LEX)
977 PAD_SVl(PL_op->op_targ) = src;
978 else
414bf5ae 979 DEFSV_set(src);
a0d0e21e
LW		 980
981 PUTBACK;
533c011a 982 if (PL_op->op_type == OP_MAPSTART)
897d3989 983 Perl_pp_pushmark(aTHX); /* push top */
533c011a 984 return ((LOGOP*)PL_op->op_next)->op_other;
a0d0e21e
LW		 985}
986
a0d0e21e
LW		 987PP(pp_mapwhile)
988{
27da23d5 989 dVAR; dSP;
f54cb97a 990 const I32 gimme = GIMME_V;
544f3153 991 I32 items = (SP - PL_stack_base) - *PL_markstack_ptr; /* how many new items */
a0d0e21e
LW		 992 I32 count;
993 I32 shift;
994 SV** src;
ac27b0f5 995 SV** dst;
a0d0e21e 996
544f3153 997 /* first, move source pointer to the next item in the source list */
3280af22 998 ++PL_markstack_ptr[-1];
544f3153
GS		 999
1000 /* if there are new items, push them into the destination list */
4c90a460 1001 if (items && gimme != G_VOID) {
544f3153
GS		 1002 /* might need to make room back there first */
1003 if (items > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
1004 /* XXX this implementation is very pessimal because the stack
1005 * is repeatedly extended for every set of items. Is possible
1006 * to do this without any stack extension or copying at all
1007 * by maintaining a separate list over which the map iterates
18ef8bea 1008 * (like foreach does). --gsar */
544f3153
GS		 1009
1010 /* everything in the stack after the destination list moves
1011 * towards the end the stack by the amount of room needed */
1012 shift = items - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
1013
1014 /* items to shift up (accounting for the moved source pointer) */
1015 count = (SP - PL_stack_base) - (PL_markstack_ptr[-1] - 1);
18ef8bea
BT		 1016
1017 /* This optimization is by Ben Tilly and it does
1018 * things differently from what Sarathy (gsar)
1019 * is describing. The downside of this optimization is
1020 * that leaves "holes" (uninitialized and hopefully unused areas)
1021 * to the Perl stack, but on the other hand this
1022 * shouldn't be a problem. If Sarathy's idea gets
1023 * implemented, this optimization should become
1024 * irrelevant. --jhi */
1025 if (shift < count)
1026 shift = count; /* Avoid shifting too often --Ben Tilly */
bfed75c6 1027
924508f0
GS		 1028 EXTEND(SP,shift);
1029 src = SP;
1030 dst = (SP += shift);
3280af22
NIS		 1031 PL_markstack_ptr[-1] += shift;
1032 *PL_markstack_ptr += shift;
544f3153 1033 while (count--)
a0d0e21e
LW		 1034 *dst-- = *src--;
1035 }
544f3153 1036 /* copy the new items down to the destination list */
ac27b0f5 1037 dst = PL_stack_base + (PL_markstack_ptr[-2] += items) - 1;
22023b26 1038 if (gimme == G_ARRAY) {
b2a2a901
DM		 1039 /* add returned items to the collection (making mortal copies
1040 * if necessary), then clear the current temps stack frame
1041 * *except* for those items. We do this splicing the items
1042 * into the start of the tmps frame (so some items may be on
59d53fd6 1043 * the tmps stack twice), then moving PL_tmps_floor above
b2a2a901
DM		 1044 * them, then freeing the frame. That way, the only tmps that
1045 * accumulate over iterations are the return values for map.
1046 * We have to do to this way so that everything gets correctly
1047 * freed if we die during the map.
1048 */
1049 I32 tmpsbase;
1050 I32 i = items;
1051 /* make space for the slice */
1052 EXTEND_MORTAL(items);
1053 tmpsbase = PL_tmps_floor + 1;
1054 Move(PL_tmps_stack + tmpsbase,
1055 PL_tmps_stack + tmpsbase + items,
1056 PL_tmps_ix - PL_tmps_floor,
1057 SV*);
1058 PL_tmps_ix += items;
1059
1060 while (i-- > 0) {
1061 SV *sv = POPs;
1062 if (!SvTEMP(sv))
1063 sv = sv_mortalcopy(sv);
1064 *dst-- = sv;
1065 PL_tmps_stack[tmpsbase++] = SvREFCNT_inc_simple(sv);
1066 }
1067 /* clear the stack frame except for the items */
1068 PL_tmps_floor += items;
1069 FREETMPS;
1070 /* FREETMPS may have cleared the TEMP flag on some of the items */
1071 i = items;
1072 while (i-- > 0)
1073 SvTEMP_on(PL_tmps_stack[--tmpsbase]);
22023b26 1074 }
bfed75c6 1075 else {
22023b26
TP		 1076 /* scalar context: we don't care about which values map returns
1077 * (we use undef here). And so we certainly don't want to do mortal
1078 * copies of meaningless values. */
1079 while (items-- > 0) {
b988aa42 1080 (void)POPs;
22023b26
TP		 1081 *dst-- = &PL_sv_undef;
1082 }
b2a2a901 1083 FREETMPS;
22023b26 1084 }
a0d0e21e 1085 }
b2a2a901
DM		 1086 else {
1087 FREETMPS;
1088 }
d343c3ef 1089 LEAVE_with_name("grep_item"); /* exit inner scope */
a0d0e21e
LW		 1090
1091 /* All done yet? */
3280af22 1092 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
a0d0e21e
LW		 1093
1094 (void)POPMARK; /* pop top */
d343c3ef 1095 LEAVE_with_name("grep"); /* exit outer scope */
a0d0e21e 1096 (void)POPMARK; /* pop src */
3280af22 1097 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
a0d0e21e 1098 (void)POPMARK; /* pop dst */
3280af22 1099 SP = PL_stack_base + POPMARK; /* pop original mark */
54310121 1100 if (gimme == G_SCALAR) {
7cc47870
RGS		 1101 if (PL_op->op_private & OPpGREP_LEX) {
1102 SV* sv = sv_newmortal();
1103 sv_setiv(sv, items);
1104 PUSHs(sv);
1105 }
1106 else {
1107 dTARGET;
1108 XPUSHi(items);
1109 }
a0d0e21e 1110 }
54310121 1111 else if (gimme == G_ARRAY)
1112 SP += items;
a0d0e21e
LW		 1113 RETURN;
1114 }
1115 else {
1116 SV *src;
1117
d343c3ef 1118 ENTER_with_name("grep_item"); /* enter inner scope */
7766f137 1119 SAVEVPTR(PL_curpm);
a0d0e21e 1120
544f3153 1121 /* set $_ to the new source item */
3280af22 1122 src = PL_stack_base[PL_markstack_ptr[-1]];
a0d0e21e 1123 SvTEMP_off(src);
59f00321
RGS		 1124 if (PL_op->op_private & OPpGREP_LEX)
1125 PAD_SVl(PL_op->op_targ) = src;
1126 else
414bf5ae 1127 DEFSV_set(src);
a0d0e21e
LW		 1128
1129 RETURNOP(cLOGOP->op_other);
1130 }
1131}
1132
a0d0e21e
LW		 1133/* Range stuff. */
1134
1135PP(pp_range)
1136{
97aff369 1137 dVAR;
a0d0e21e 1138 if (GIMME == G_ARRAY)
1a67a97c 1139 return NORMAL;
538573f7 1140 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
1a67a97c 1141 return cLOGOP->op_other;
538573f7 1142 else
1a67a97c 1143 return NORMAL;
a0d0e21e
LW		 1144}
1145
1146PP(pp_flip)
1147{
97aff369 1148 dVAR;
39644a26 1149 dSP;
a0d0e21e
LW		 1150
1151 if (GIMME == G_ARRAY) {
1a67a97c 1152 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1153 }
1154 else {
1155 dTOPss;
44f8325f 1156 SV * const targ = PAD_SV(PL_op->op_targ);
bfed75c6 1157 int flip = 0;
790090df 1158
bfed75c6 1159 if (PL_op->op_private & OPpFLIP_LINENUM) {
4e3399f9
YST		 1160 if (GvIO(PL_last_in_gv)) {
1161 flip = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1162 }
1163 else {
fafc274c 1164 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
44f8325f
AL		 1165 if (gv && GvSV(gv))
1166 flip = SvIV(sv) == SvIV(GvSV(gv));
4e3399f9 1167 }
bfed75c6
AL		 1168 } else {
1169 flip = SvTRUE(sv);
1170 }
1171 if (flip) {
a0d0e21e 1172 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
533c011a 1173 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e 1174 sv_setiv(targ, 1);
3e3baf6d 1175 SETs(targ);
a0d0e21e
LW		 1176 RETURN;
1177 }
1178 else {
1179 sv_setiv(targ, 0);
924508f0 1180 SP--;
1a67a97c 1181 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
a0d0e21e
LW		 1182 }
1183 }
76f68e9b 1184 sv_setpvs(TARG, "");
a0d0e21e
LW		 1185 SETs(targ);
1186 RETURN;
1187 }
1188}
1189
8e9bbdb9
RGS		 1190/* This code tries to decide if "$left .. $right" should use the
1191 magical string increment, or if the range is numeric (we make
1192 an exception for .."0" [#18165]). AMS 20021031. */
1193
1194#define RANGE_IS_NUMERIC(left,right) ( \
b0e74086
RGS		 1195 SvNIOKp(left) || (SvOK(left) && !SvPOKp(left)) || \
1196 SvNIOKp(right) || (SvOK(right) && !SvPOKp(right)) || \
e0ab1c0e 1197 (((!SvOK(left) && SvOK(right)) || ((!SvOK(left) || \
b15aece3 1198 looks_like_number(left)) && SvPOKp(left) && *SvPVX_const(left) != '0')) \
e0ab1c0e 1199 && (!SvOK(right) || looks_like_number(right))))
8e9bbdb9 1200
a0d0e21e
LW		 1201PP(pp_flop)
1202{
97aff369 1203 dVAR; dSP;
a0d0e21e
LW		 1204
1205 if (GIMME == G_ARRAY) {
1206 dPOPPOPssrl;
86cb7173 1207
5b295bef
RD		 1208 SvGETMAGIC(left);
1209 SvGETMAGIC(right);
a0d0e21e 1210
8e9bbdb9 1211 if (RANGE_IS_NUMERIC(left,right)) {
901017d6
AL		 1212 register IV i, j;
1213 IV max;
f52e41ad
FC		 1214 if ((SvOK(left) && SvNV_nomg(left) < IV_MIN) ||
1215 (SvOK(right) && SvNV_nomg(right) > IV_MAX))
d470f89e 1216 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC		 1217 i = SvIV_nomg(left);
1218 max = SvIV_nomg(right);
bbce6d69 1219 if (max >= i) {
c1ab3db2
AK		 1220 j = max - i + 1;
1221 EXTEND_MORTAL(j);
1222 EXTEND(SP, j);
bbce6d69 1223 }
c1ab3db2
AK		 1224 else
1225 j = 0;
1226 while (j--) {
901017d6 1227 SV * const sv = sv_2mortal(newSViv(i++));
a0d0e21e
LW		 1228 PUSHs(sv);
1229 }
1230 }
1231 else {
3c323193
FC		 1232 STRLEN len, llen;
1233 const char * const lpv = SvPV_nomg_const(left, llen);
f52e41ad 1234 const char * const tmps = SvPV_nomg_const(right, len);
a0d0e21e 1235
3c323193 1236 SV *sv = newSVpvn_flags(lpv, llen, SvUTF8(left)|SVs_TEMP);
89ea2908 1237 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
a0d0e21e 1238 XPUSHs(sv);
b15aece3 1239 if (strEQ(SvPVX_const(sv),tmps))
89ea2908 1240 break;
a0d0e21e
LW		 1241 sv = sv_2mortal(newSVsv(sv));
1242 sv_inc(sv);
1243 }
a0d0e21e
LW		 1244 }
1245 }
1246 else {
1247 dTOPss;
901017d6 1248 SV * const targ = PAD_SV(cUNOP->op_first->op_targ);
4e3399f9 1249 int flop = 0;
a0d0e21e 1250 sv_inc(targ);
4e3399f9
YST		 1251
1252 if (PL_op->op_private & OPpFLIP_LINENUM) {
1253 if (GvIO(PL_last_in_gv)) {
1254 flop = SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv));
1255 }
1256 else {
fafc274c 1257 GV * const gv = gv_fetchpvs(".", GV_ADD|GV_NOTQUAL, SVt_PV);
4e3399f9
YST		 1258 if (gv && GvSV(gv)) flop = SvIV(sv) == SvIV(GvSV(gv));
1259 }
1260 }
1261 else {
1262 flop = SvTRUE(sv);
1263 }
1264
1265 if (flop) {
a0d0e21e 1266 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
396482e1 1267 sv_catpvs(targ, "E0");
a0d0e21e
LW		 1268 }
1269 SETs(targ);
1270 }
1271
1272 RETURN;
1273}
1274
1275/* Control. */
1276
27da23d5 1277static const char * const context_name[] = {
515afda2 1278 "pseudo-block",
f31522f3 1279 NULL, /* CXt_WHEN never actually needs "block" */
76753e7f 1280 NULL, /* CXt_BLOCK never actually needs "block" */
f31522f3 1281 NULL, /* CXt_GIVEN never actually needs "block" */
76753e7f
NC		 1282 NULL, /* CXt_LOOP_FOR never actually needs "loop" */
1283 NULL, /* CXt_LOOP_PLAIN never actually needs "loop" */
1284 NULL, /* CXt_LOOP_LAZYSV never actually needs "loop" */
1285 NULL, /* CXt_LOOP_LAZYIV never actually needs "loop" */
515afda2 1286 "subroutine",
76753e7f 1287 "format",
515afda2 1288 "eval",
515afda2 1289 "substitution",
515afda2
NC		 1290};
1291
76e3520e 1292STATIC I32
5db1eb8d 1293S_dopoptolabel(pTHX_ const char *label, STRLEN len, U32 flags)
a0d0e21e 1294{
97aff369 1295 dVAR;
a0d0e21e 1296 register I32 i;
a0d0e21e 1297
7918f24d
NC		 1298 PERL_ARGS_ASSERT_DOPOPTOLABEL;
1299
a0d0e21e 1300 for (i = cxstack_ix; i >= 0; i--) {
901017d6 1301 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1302 switch (CxTYPE(cx)) {
a0d0e21e 1303 case CXt_SUBST:
a0d0e21e 1304 case CXt_SUB:
7766f137 1305 case CXt_FORMAT:
a0d0e21e 1306 case CXt_EVAL:
0a753a76 1307 case CXt_NULL:
dcbac5bb 1308 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC		 1309 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1310 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC		 1311 if (CxTYPE(cx) == CXt_NULL)
1312 return -1;
1313 break;
c6fdafd0 1314 case CXt_LOOP_LAZYIV:
d01136d6 1315 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1316 case CXt_LOOP_FOR:
1317 case CXt_LOOP_PLAIN:
7e8f1eac 1318 {
5db1eb8d
BF		 1319 STRLEN cx_label_len = 0;
1320 U32 cx_label_flags = 0;
1321 const char *cx_label = CxLABEL_len_flags(cx, &cx_label_len, &cx_label_flags);
1322 if (!cx_label || !(
1323 ( (cx_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
1324 (flags & SVf_UTF8)
1325 ? (bytes_cmp_utf8(
1326 (const U8*)cx_label, cx_label_len,
1327 (const U8*)label, len) == 0)
1328 : (bytes_cmp_utf8(
1329 (const U8*)label, len,
1330 (const U8*)cx_label, cx_label_len) == 0)
eade7155
BF		 1331 : (len == cx_label_len && ((cx_label == label)
1332 || memEQ(cx_label, label, len))) )) {
1c98cc53 1333 DEBUG_l(Perl_deb(aTHX_ "(poptolabel(): skipping label at cx=%ld %s)\n",
7e8f1eac 1334 (long)i, cx_label));
a0d0e21e
LW		 1335 continue;
1336 }
1c98cc53 1337 DEBUG_l( Perl_deb(aTHX_ "(poptolabel(): found label at cx=%ld %s)\n", (long)i, label));
a0d0e21e 1338 return i;
7e8f1eac 1339 }
a0d0e21e
LW		 1340 }
1341 }
1342 return i;
1343}
1344
0d863452
RH		 1345
1346
e50aee73 1347I32
864dbfa3 1348Perl_dowantarray(pTHX)
e50aee73 1349{
97aff369 1350 dVAR;
f54cb97a 1351 const I32 gimme = block_gimme();
54310121 1352 return (gimme == G_VOID) ? G_SCALAR : gimme;
1353}
1354
1355I32
864dbfa3 1356Perl_block_gimme(pTHX)
54310121 1357{
97aff369 1358 dVAR;
06b5626a 1359 const I32 cxix = dopoptosub(cxstack_ix);
e50aee73 1360 if (cxix < 0)
46fc3d4c 1361 return G_VOID;
e50aee73 1362
54310121 1363 switch (cxstack[cxix].blk_gimme) {
d2719217
GS		 1364 case G_VOID:
1365 return G_VOID;
54310121 1366 case G_SCALAR:
e50aee73 1367 return G_SCALAR;
54310121 1368 case G_ARRAY:
1369 return G_ARRAY;
1370 default:
cea2e8a9 1371 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
118e2215 1372 assert(0); /* NOTREACHED */
d2719217 1373 return 0;
54310121 1374 }
e50aee73
AD		 1375}
1376
78f9721b
SM		 1377I32
1378Perl_is_lvalue_sub(pTHX)
1379{
97aff369 1380 dVAR;
06b5626a 1381 const I32 cxix = dopoptosub(cxstack_ix);
78f9721b
SM		 1382 assert(cxix >= 0); /* We should only be called from inside subs */
1383
bafb2adc
NC		 1384 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1385 return CxLVAL(cxstack + cxix);
78f9721b
SM		 1386 else
1387 return 0;
1388}
1389
777d9014
FC		 1390/* only used by PUSHSUB */
1391I32
1392Perl_was_lvalue_sub(pTHX)
1393{
1394 dVAR;
1395 const I32 cxix = dopoptosub(cxstack_ix-1);
1396 assert(cxix >= 0); /* We should only be called from inside subs */
1397
1398 if (CxLVAL(cxstack + cxix) && CvLVALUE(cxstack[cxix].blk_sub.cv))
1399 return CxLVAL(cxstack + cxix);
1400 else
1401 return 0;
1402}
1403
76e3520e 1404STATIC I32
901017d6 1405S_dopoptosub_at(pTHX_ const PERL_CONTEXT *cxstk, I32 startingblock)
2c375eb9 1406{
97aff369 1407 dVAR;
a0d0e21e 1408 I32 i;
7918f24d
NC		 1409
1410 PERL_ARGS_ASSERT_DOPOPTOSUB_AT;
1411
a0d0e21e 1412 for (i = startingblock; i >= 0; i--) {
901017d6 1413 register const PERL_CONTEXT * const cx = &cxstk[i];
6b35e009 1414 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1415 default:
1416 continue;
1417 case CXt_EVAL:
1418 case CXt_SUB:
7766f137 1419 case CXt_FORMAT:
1c98cc53 1420 DEBUG_l( Perl_deb(aTHX_ "(dopoptosub_at(): found sub at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1421 return i;
1422 }
1423 }
1424 return i;
1425}
1426
76e3520e 1427STATIC I32
cea2e8a9 1428S_dopoptoeval(pTHX_ I32 startingblock)
a0d0e21e 1429{
97aff369 1430 dVAR;
a0d0e21e 1431 I32 i;
a0d0e21e 1432 for (i = startingblock; i >= 0; i--) {
06b5626a 1433 register const PERL_CONTEXT *cx = &cxstack[i];
6b35e009 1434 switch (CxTYPE(cx)) {
a0d0e21e
LW		 1435 default:
1436 continue;
1437 case CXt_EVAL:
1c98cc53 1438 DEBUG_l( Perl_deb(aTHX_ "(dopoptoeval(): found eval at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1439 return i;
1440 }
1441 }
1442 return i;
1443}
1444
76e3520e 1445STATIC I32
cea2e8a9 1446S_dopoptoloop(pTHX_ I32 startingblock)
a0d0e21e 1447{
97aff369 1448 dVAR;
a0d0e21e 1449 I32 i;
a0d0e21e 1450 for (i = startingblock; i >= 0; i--) {
901017d6 1451 register const PERL_CONTEXT * const cx = &cxstack[i];
6b35e009 1452 switch (CxTYPE(cx)) {
a0d0e21e 1453 case CXt_SUBST:
a0d0e21e 1454 case CXt_SUB:
7766f137 1455 case CXt_FORMAT:
a0d0e21e 1456 case CXt_EVAL:
0a753a76 1457 case CXt_NULL:
dcbac5bb 1458 /* diag_listed_as: Exiting subroutine via %s */
a2a5de95
NC		 1459 Perl_ck_warner(aTHX_ packWARN(WARN_EXITING), "Exiting %s via %s",
1460 context_name[CxTYPE(cx)], OP_NAME(PL_op));
515afda2
NC		 1461 if ((CxTYPE(cx)) == CXt_NULL)
1462 return -1;
1463 break;
c6fdafd0 1464 case CXt_LOOP_LAZYIV:
d01136d6 1465 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1466 case CXt_LOOP_FOR:
1467 case CXt_LOOP_PLAIN:
1c98cc53 1468 DEBUG_l( Perl_deb(aTHX_ "(dopoptoloop(): found loop at cx=%ld)\n", (long)i));
a0d0e21e
LW		 1469 return i;
1470 }
1471 }
1472 return i;
1473}
1474
0d863452
RH		 1475STATIC I32
1476S_dopoptogiven(pTHX_ I32 startingblock)
1477{
97aff369 1478 dVAR;
0d863452
RH		 1479 I32 i;
1480 for (i = startingblock; i >= 0; i--) {
1481 register const PERL_CONTEXT *cx = &cxstack[i];
1482 switch (CxTYPE(cx)) {
1483 default:
1484 continue;
1485 case CXt_GIVEN:
1c98cc53 1486 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found given at cx=%ld)\n", (long)i));
0d863452 1487 return i;
3b719c58
NC		 1488 case CXt_LOOP_PLAIN:
1489 assert(!CxFOREACHDEF(cx));
1490 break;
c6fdafd0 1491 case CXt_LOOP_LAZYIV:
d01136d6 1492 case CXt_LOOP_LAZYSV:
3b719c58 1493 case CXt_LOOP_FOR:
0d863452 1494 if (CxFOREACHDEF(cx)) {
1c98cc53 1495 DEBUG_l( Perl_deb(aTHX_ "(dopoptogiven(): found foreach at cx=%ld)\n", (long)i));
0d863452
RH		 1496 return i;
1497 }
1498 }
1499 }
1500 return i;
1501}
1502
1503STATIC I32
1504S_dopoptowhen(pTHX_ I32 startingblock)
1505{
97aff369 1506 dVAR;
0d863452
RH		 1507 I32 i;
1508 for (i = startingblock; i >= 0; i--) {
1509 register const PERL_CONTEXT *cx = &cxstack[i];
1510 switch (CxTYPE(cx)) {
1511 default:
1512 continue;
1513 case CXt_WHEN:
1c98cc53 1514 DEBUG_l( Perl_deb(aTHX_ "(dopoptowhen(): found when at cx=%ld)\n", (long)i));
0d863452
RH		 1515 return i;
1516 }
1517 }
1518 return i;
1519}
1520
a0d0e21e 1521void
864dbfa3 1522Perl_dounwind(pTHX_ I32 cxix)
a0d0e21e 1523{
97aff369 1524 dVAR;
a0d0e21e
LW		 1525 I32 optype;
1526
f144f1e3
DM		 1527 if (!PL_curstackinfo) /* can happen if die during thread cloning */
1528 return;
1529
a0d0e21e 1530 while (cxstack_ix > cxix) {
b0d9ce38 1531 SV *sv;
06b5626a 1532 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
1c98cc53 1533 DEBUG_CX("UNWIND"); \
a0d0e21e 1534 /* Note: we don't need to restore the base context info till the end. */
6b35e009 1535 switch (CxTYPE(cx)) {
c90c0ff4 1536 case CXt_SUBST:
1537 POPSUBST(cx);
1538 continue; /* not break */
a0d0e21e 1539 case CXt_SUB:
b0d9ce38
GS		 1540 POPSUB(cx,sv);
1541 LEAVESUB(sv);
a0d0e21e
LW		 1542 break;
1543 case CXt_EVAL:
1544 POPEVAL(cx);
1545 break;
c6fdafd0 1546 case CXt_LOOP_LAZYIV:
d01136d6 1547 case CXt_LOOP_LAZYSV:
3b719c58
NC		 1548 case CXt_LOOP_FOR:
1549 case CXt_LOOP_PLAIN:
a0d0e21e
LW		 1550 POPLOOP(cx);
1551 break;
0a753a76 1552 case CXt_NULL:
a0d0e21e 1553 break;
7766f137
GS		 1554 case CXt_FORMAT:
1555 POPFORMAT(cx);
1556 break;
a0d0e21e 1557 }
c90c0ff4 1558 cxstack_ix--;
a0d0e21e 1559 }
1b6737cc 1560 PERL_UNUSED_VAR(optype);
a0d0e21e
LW		 1561}
1562
5a844595
GS		 1563void
1564Perl_qerror(pTHX_ SV *err)
1565{
97aff369 1566 dVAR;
7918f24d
NC		 1567
1568 PERL_ARGS_ASSERT_QERROR;
1569
6b2fb389
DM		 1570 if (PL_in_eval) {
1571 if (PL_in_eval & EVAL_KEEPERR) {
ecad31f0
BF		 1572 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1573 SVfARG(err));
6b2fb389
DM		 1574 }
1575 else
1576 sv_catsv(ERRSV, err);
1577 }
5a844595
GS		 1578 else if (PL_errors)
1579 sv_catsv(PL_errors, err);
1580 else
be2597df 1581 Perl_warn(aTHX_ "%"SVf, SVfARG(err));
13765c85
DM		 1582 if (PL_parser)
1583 ++PL_parser->error_count;
5a844595
GS		 1584}
1585
bb4c52e0 1586void
c5df3096 1587Perl_die_unwind(pTHX_ SV *msv)
a0d0e21e 1588{
27da23d5 1589 dVAR;
c5df3096 1590 SV *exceptsv = sv_mortalcopy(msv);
96d9b9cd 1591 U8 in_eval = PL_in_eval;
c5df3096 1592 PERL_ARGS_ASSERT_DIE_UNWIND;
87582a92 1593
96d9b9cd 1594 if (in_eval) {
a0d0e21e 1595 I32 cxix;
a0d0e21e 1596 I32 gimme;
a0d0e21e 1597
22a30693
Z		 1598 /*
1599 * Historically, perl used to set ERRSV ($@) early in the die
1600 * process and rely on it not getting clobbered during unwinding.
1601 * That sucked, because it was liable to get clobbered, so the
1602 * setting of ERRSV used to emit the exception from eval{} has
1603 * been moved to much later, after unwinding (see just before
1604 * JMPENV_JUMP below). However, some modules were relying on the
1605 * early setting, by examining $@ during unwinding to use it as
1606 * a flag indicating whether the current unwinding was caused by
1607 * an exception. It was never a reliable flag for that purpose,
1608 * being totally open to false positives even without actual
1609 * clobberage, but was useful enough for production code to
1610 * semantically rely on it.
1611 *
1612 * We'd like to have a proper introspective interface that
1613 * explicitly describes the reason for whatever unwinding
1614 * operations are currently in progress, so that those modules
1615 * work reliably and $@ isn't further overloaded. But we don't
1616 * have one yet. In its absence, as a stopgap measure, ERRSV is
1617 * now *additionally* set here, before unwinding, to serve as the
1618 * (unreliable) flag that it used to.
1619 *
1620 * This behaviour is temporary, and should be removed when a
1621 * proper way to detect exceptional unwinding has been developed.
1622 * As of 2010-12, the authors of modules relying on the hack
1623 * are aware of the issue, because the modules failed on
1624 * perls 5.13.{1..7} which had late setting of $@ without this
1625 * early-setting hack.
1626 */
1627 if (!(in_eval & EVAL_KEEPERR)) {
1628 SvTEMP_off(exceptsv);
1629 sv_setsv(ERRSV, exceptsv);
1630 }
1631
5a844595
GS		 1632 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1633 && PL_curstackinfo->si_prev)
1634 {
bac4b2ad 1635 dounwind(-1);
d3acc0f7 1636 POPSTACK;
bac4b2ad 1637 }
e336de0d 1638
a0d0e21e
LW		 1639 if (cxix >= 0) {
1640 I32 optype;
b6494f15 1641 SV *namesv;
35a4481c 1642 register PERL_CONTEXT *cx;
901017d6 1643 SV **newsp;
8f89e5a9
Z		 1644 COP *oldcop;
1645 JMPENV *restartjmpenv;
1646 OP *restartop;
a0d0e21e
LW		 1647
1648 if (cxix < cxstack_ix)
1649 dounwind(cxix);
1650
3280af22 1651 POPBLOCK(cx,PL_curpm);
6b35e009 1652 if (CxTYPE(cx) != CXt_EVAL) {
7d0994e0 1653 STRLEN msglen;
96d9b9cd 1654 const char* message = SvPVx_const(exceptsv, msglen);
10edeb5d 1655 PerlIO_write(Perl_error_log, (const char *)"panic: die ", 11);
bf49b057 1656 PerlIO_write(Perl_error_log, message, msglen);
a0d0e21e
LW		 1657 my_exit(1);
1658 }
1659 POPEVAL(cx);
b6494f15 1660 namesv = cx->blk_eval.old_namesv;
8f89e5a9
Z		 1661 oldcop = cx->blk_oldcop;
1662 restartjmpenv = cx->blk_eval.cur_top_env;
1663 restartop = cx->blk_eval.retop;
a0d0e21e
LW		 1664
1665 if (gimme == G_SCALAR)
3280af22
NIS		 1666 *++newsp = &PL_sv_undef;
1667 PL_stack_sp = newsp;
a0d0e21e
LW		 1668
1669 LEAVE;
748a9306 1670
7fb6a879
GS		 1671 /* LEAVE could clobber PL_curcop (see save_re_context())
1672 * XXX it might be better to find a way to avoid messing with
1673 * PL_curcop in save_re_context() instead, but this is a more
1674 * minimal fix --GSAR */
8f89e5a9 1675 PL_curcop = oldcop;
7fb6a879 1676
7a2e2cd6 1677 if (optype == OP_REQUIRE) {
b6494f15 1678 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 1679 SvPVX_const(namesv),
c60dbbc3 1680 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
27bcc0a7 1681 &PL_sv_undef, 0);
27e90453
DM		 1682 /* note that unlike pp_entereval, pp_require isn't
1683 * supposed to trap errors. So now that we've popped the
1684 * EVAL that pp_require pushed, and processed the error
1685 * message, rethrow the error */
ecad31f0
BF		 1686 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
1687 SVfARG(exceptsv ? exceptsv : newSVpvs_flags("Unknown error\n",
1688 SVs_TEMP)));
7a2e2cd6 1689 }
c5df3096 1690 if (in_eval & EVAL_KEEPERR) {
ecad31f0
BF		 1691 Perl_ck_warner(aTHX_ packWARN(WARN_MISC), "\t(in cleanup) %"SVf,
1692 SVfARG(exceptsv));
96d9b9cd
Z		 1693 }
1694 else {
1695 sv_setsv(ERRSV, exceptsv);
1696 }
8f89e5a9
Z		 1697 PL_restartjmpenv = restartjmpenv;
1698 PL_restartop = restartop;
bb4c52e0 1699 JMPENV_JUMP(3);
118e2215 1700 assert(0); /* NOTREACHED */
a0d0e21e
LW		 1701 }
1702 }
87582a92 1703
96d9b9cd 1704 write_to_stderr(exceptsv);
f86702cc 1705 my_failure_exit();
118e2215 1706 assert(0); /* NOTREACHED */
a0d0e21e
LW		 1707}
1708
1709PP(pp_xor)
1710{
97aff369 1711 dVAR; dSP; dPOPTOPssrl;
a0d0e21e
LW		 1712 if (SvTRUE(left) != SvTRUE(right))
1713 RETSETYES;
1714 else
1715 RETSETNO;
1716}
1717
8dff4fc5
BM		 1718/*
1719=for apidoc caller_cx
1720
1721The XSUB-writer's equivalent of L<caller()|perlfunc/caller>. The
1722returned C<PERL_CONTEXT> structure can be interrogated to find all the
1723information returned to Perl by C<caller>. Note that XSUBs don't get a
1724stack frame, so C<caller_cx(0, NULL)> will return information for the
1725immediately-surrounding Perl code.
1726
1727This function skips over the automatic calls to C<&DB::sub> made on the
1728behalf of the debugger. If the stack frame requested was a sub called by
1729C<DB::sub>, the return value will be the frame for the call to
1730C<DB::sub>, since that has the correct line number/etc. for the call
1731site. If I<dbcxp> is non-C<NULL>, it will be set to a pointer to the
1732frame for the sub call itself.
1733
1734=cut
1735*/
1736
1737const PERL_CONTEXT *
1738Perl_caller_cx(pTHX_ I32 count, const PERL_CONTEXT **dbcxp)
a0d0e21e 1739{
a0d0e21e 1740 register I32 cxix = dopoptosub(cxstack_ix);
901017d6
AL		 1741 register const PERL_CONTEXT *cx;
1742 register const PERL_CONTEXT *ccstack = cxstack;
1743 const PERL_SI *top_si = PL_curstackinfo;
27d41816 1744
a0d0e21e 1745 for (;;) {
2c375eb9
GS		 1746 /* we may be in a higher stacklevel, so dig down deeper */
1747 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1748 top_si = top_si->si_prev;
1749 ccstack = top_si->si_cxstack;
1750 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1751 }
8dff4fc5
BM		 1752 if (cxix < 0)
1753 return NULL;
f2a7f298
DG		 1754 /* caller() should not report the automatic calls to &DB::sub */
1755 if (PL_DBsub && GvCV(PL_DBsub) && cxix >= 0 &&
3280af22 1756 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
a0d0e21e
LW		 1757 count++;
1758 if (!count--)
1759 break;
2c375eb9 1760 cxix = dopoptosub_at(ccstack, cxix - 1);
a0d0e21e 1761 }
2c375eb9
GS		 1762
1763 cx = &ccstack[cxix];
8dff4fc5
BM		 1764 if (dbcxp) *dbcxp = cx;
1765
7766f137 1766 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
f54cb97a 1767 const I32 dbcxix = dopoptosub_at(ccstack, cxix - 1);
2c375eb9 1768 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
06a5b730 1769 field below is defined for any cx. */
f2a7f298
DG		 1770 /* caller() should not report the automatic calls to &DB::sub */
1771 if (PL_DBsub && GvCV(PL_DBsub) && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
2c375eb9 1772 cx = &ccstack[dbcxix];
06a5b730 1773 }
1774
8dff4fc5
BM		 1775 return cx;
1776}
1777
1778PP(pp_caller)
1779{
1780 dVAR;
1781 dSP;
1782 register const PERL_CONTEXT *cx;
1783 const PERL_CONTEXT *dbcx;
1784 I32 gimme;
d527ce7c 1785 const HEK *stash_hek;
8dff4fc5 1786 I32 count = 0;
ce0b554b 1787 bool has_arg = MAXARG && TOPs;
8dff4fc5 1788
ce0b554b
FC		 1789 if (MAXARG) {
1790 if (has_arg)
8dff4fc5 1791 count = POPi;
ce0b554b
FC		 1792 else (void)POPs;
1793 }
8dff4fc5 1794
ce0b554b 1795 cx = caller_cx(count + !!(PL_op->op_private & OPpOFFBYONE), &dbcx);
8dff4fc5
BM		 1796 if (!cx) {
1797 if (GIMME != G_ARRAY) {
1798 EXTEND(SP, 1);
1799 RETPUSHUNDEF;
1800 }
1801 RETURN;
1802 }
1803
fb55feef 1804 DEBUG_CX("CALLER");
d0279c7c 1805 assert(CopSTASH(cx->blk_oldcop));
e7886211
FC		 1806 stash_hek = SvTYPE(CopSTASH(cx->blk_oldcop)) == SVt_PVHV
1807 ? HvNAME_HEK((HV*)CopSTASH(cx->blk_oldcop))
1808 : NULL;
a0d0e21e 1809 if (GIMME != G_ARRAY) {
27d41816 1810 EXTEND(SP, 1);
d527ce7c 1811 if (!stash_hek)
3280af22 1812 PUSHs(&PL_sv_undef);
49d8d3a1
MB		 1813 else {
1814 dTARGET;
d527ce7c 1815 sv_sethek(TARG, stash_hek);
49d8d3a1
MB		 1816 PUSHs(TARG);
1817 }
a0d0e21e
LW		 1818 RETURN;
1819 }
a0d0e21e 1820
b3ca2e83 1821 EXTEND(SP, 11);
27d41816 1822
d527ce7c 1823 if (!stash_hek)
3280af22 1824 PUSHs(&PL_sv_undef);
d527ce7c
BF		 1825 else {
1826 dTARGET;
1827 sv_sethek(TARG, stash_hek);
1828 PUSHTARG;
1829 }
6e449a3a
MHM		 1830 mPUSHs(newSVpv(OutCopFILE(cx->blk_oldcop), 0));
1831 mPUSHi((I32)CopLINE(cx->blk_oldcop));
ce0b554b 1832 if (!has_arg)
a0d0e21e 1833 RETURN;
7766f137 1834 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
8dff4fc5 1835 GV * const cvgv = CvGV(dbcx->blk_sub.cv);
7766f137 1836 /* So is ccstack[dbcxix]. */
81ed78b2 1837 if (cvgv && isGV(cvgv)) {
561b68a9 1838 SV * const sv = newSV(0);
c445ea15 1839 gv_efullname3(sv, cvgv, NULL);
6e449a3a 1840 mPUSHs(sv);
bf38a478 1841 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804
RGS		 1842 }
1843 else {
84bafc02 1844 PUSHs(newSVpvs_flags("(unknown)", SVs_TEMP));
bf38a478 1845 PUSHs(boolSV(CxHASARGS(cx)));
07b8c804 1846 }
a0d0e21e
LW		 1847 }
1848 else {
84bafc02 1849 PUSHs(newSVpvs_flags("(eval)", SVs_TEMP));
6e449a3a 1850 mPUSHi(0);
a0d0e21e 1851 }
54310121 1852 gimme = (I32)cx->blk_gimme;
1853 if (gimme == G_VOID)
3280af22 1854 PUSHs(&PL_sv_undef);
54310121 1855 else
98625aca 1856 PUSHs(boolSV((gimme & G_WANT) == G_ARRAY));
6b35e009 1857 if (CxTYPE(cx) == CXt_EVAL) {
811a4de9 1858 /* eval STRING */
85a64632 1859 if (CxOLD_OP_TYPE(cx) == OP_ENTEREVAL) {
4633a7c4 1860 PUSHs(cx->blk_eval.cur_text);
3280af22 1861 PUSHs(&PL_sv_no);
0f79a09d 1862 }
811a4de9 1863 /* require */
0f79a09d 1864 else if (cx->blk_eval.old_namesv) {
6e449a3a 1865 mPUSHs(newSVsv(cx->blk_eval.old_namesv));
3280af22 1866 PUSHs(&PL_sv_yes);
06a5b730 1867 }
811a4de9
GS		 1868 /* eval BLOCK (try blocks have old_namesv == 0) */
1869 else {
1870 PUSHs(&PL_sv_undef);
1871 PUSHs(&PL_sv_undef);
1872 }
4633a7c4 1873 }
a682de96
GS		 1874 else {
1875 PUSHs(&PL_sv_undef);
1876 PUSHs(&PL_sv_undef);
1877 }
bafb2adc 1878 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)
ed094faf 1879 && CopSTASH_eq(PL_curcop, PL_debstash))
4633a7c4 1880 {
66a1b24b
AL		 1881 AV * const ary = cx->blk_sub.argarray;
1882 const int off = AvARRAY(ary) - AvALLOC(ary);
a0d0e21e 1883
e1a80902 1884 Perl_init_dbargs(aTHX);
a0d0e21e 1885
3280af22
NIS		 1886 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1887 av_extend(PL_dbargs, AvFILLp(ary) + off);
1888 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1889 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
a0d0e21e 1890 }
f3aa04c2
GS		 1891 /* XXX only hints propagated via op_private are currently
1892 * visible (others are not easily accessible, since they
1893 * use the global PL_hints) */
6e449a3a 1894 mPUSHi(CopHINTS_get(cx->blk_oldcop));
e476b1b5
GS		 1895 {
1896 SV * mask ;
72dc9ed5 1897 STRLEN * const old_warnings = cx->blk_oldcop->cop_warnings ;
114bafba 1898
ac27b0f5 1899 if (old_warnings == pWARN_NONE ||
114bafba 1900 (old_warnings == pWARN_STD && (PL_dowarn & G_WARN_ON) == 0))
e476b1b5 1901 mask = newSVpvn(WARN_NONEstring, WARNsize) ;
ac27b0f5 1902 else if (old_warnings == pWARN_ALL ||
75b6c4ca
RGS		 1903 (old_warnings == pWARN_STD && PL_dowarn & G_WARN_ON)) {
1904 /* Get the bit mask for $warnings::Bits{all}, because
1905 * it could have been extended by warnings::register */
1906 SV **bits_all;
6673a63c 1907 HV * const bits = get_hv("warnings::Bits", 0);
017a3ce5 1908 if (bits && (bits_all=hv_fetchs(bits, "all", FALSE))) {
75b6c4ca
RGS		 1909 mask = newSVsv(*bits_all);
1910 }
1911 else {
1912 mask = newSVpvn(WARN_ALLstring, WARNsize) ;
1913 }
1914 }
e476b1b5 1915 else
72dc9ed5 1916 mask = newSVpvn((char *) (old_warnings + 1), old_warnings[0]);
6e449a3a 1917 mPUSHs(mask);
e476b1b5 1918 }
b3ca2e83 1919
c28fe1ec 1920 PUSHs(cx->blk_oldcop->cop_hints_hash ?
20439bc7 1921 sv_2mortal(newRV_noinc(MUTABLE_SV(cop_hints_2hv(cx->blk_oldcop, 0))))
b3ca2e83 1922 : &PL_sv_undef);
a0d0e21e
LW		 1923 RETURN;
1924}
1925
a0d0e21e
LW		 1926PP(pp_reset)
1927{
97aff369 1928 dVAR;
39644a26 1929 dSP;
f650fa72
FC		 1930 const char * const tmps =
1931 (MAXARG < 1 || (!TOPs && !POPs)) ? (const char *)"" : POPpconstx;
11faa288 1932 sv_reset(tmps, CopSTASH(PL_curcop));
3280af22 1933 PUSHs(&PL_sv_yes);
a0d0e21e
LW		 1934 RETURN;
1935}
1936
dd2155a4
DM		 1937/* like pp_nextstate, but used instead when the debugger is active */
1938
a0d0e21e
LW		 1939PP(pp_dbstate)
1940{
27da23d5 1941 dVAR;
533c011a 1942 PL_curcop = (COP*)PL_op;
a0d0e21e 1943 TAINT_NOT; /* Each statement is presumed innocent */
3280af22 1944 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
a0d0e21e
LW		 1945 FREETMPS;
1946
f410a211
NC		 1947 PERL_ASYNC_CHECK();
1948
5df8de69
DM		 1949 if (PL_op->op_flags & OPf_SPECIAL /* breakpoint */
1950 || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
a0d0e21e 1951 {
39644a26 1952 dSP;
c09156bb 1953 register PERL_CONTEXT *cx;
f54cb97a 1954 const I32 gimme = G_ARRAY;
eb160463 1955 U8 hasargs;
0bd48802
AL		 1956 GV * const gv = PL_DBgv;
1957 register CV * const cv = GvCV(gv);
a0d0e21e 1958
a0d0e21e 1959 if (!cv)
cea2e8a9 1960 DIE(aTHX_ "No DB::DB routine defined");
a0d0e21e 1961
aea4f609
DM		 1962 if (CvDEPTH(cv) >= 1 && !(PL_debug & DEBUG_DB_RECURSE_FLAG))
1963 /* don't do recursive DB::DB call */
a0d0e21e 1964 return NORMAL;
748a9306 1965
a57c6685 1966 ENTER;
4633a7c4
LW		 1967 SAVETMPS;
1968
3280af22 1969 SAVEI32(PL_debug);
55497cff 1970 SAVESTACK_POS();
3280af22 1971 PL_debug = 0;
748a9306 1972 hasargs = 0;
924508f0 1973 SPAGAIN;
748a9306 1974
aed2304a 1975 if (CvISXSUB(cv)) {
c127bd3a
SF		 1976 CvDEPTH(cv)++;
1977 PUSHMARK(SP);
1978 (void)(*CvXSUB(cv))(aTHX_ cv);
1979 CvDEPTH(cv)--;
1980 FREETMPS;
a57c6685 1981 LEAVE;
c127bd3a
SF		 1982 return NORMAL;
1983 }
1984 else {
1985 PUSHBLOCK(cx, CXt_SUB, SP);
1986 PUSHSUB_DB(cx);
1987 cx->blk_sub.retop = PL_op->op_next;
1988 CvDEPTH(cv)++;
1989 SAVECOMPPAD();
1990 PAD_SET_CUR_NOSAVE(CvPADLIST(cv), 1);
1991 RETURNOP(CvSTART(cv));
1992 }
a0d0e21e
LW		 1993 }
1994 else
1995 return NORMAL;
1996}
1997
b9d76716
VP		 1998STATIC SV **
1999S_adjust_stack_on_leave(pTHX_ SV **newsp, SV **sp, SV **mark, I32 gimme, U32 flags)
2000{
9a214eec 2001 bool padtmp = 0;
b9d76716
VP		 2002 PERL_ARGS_ASSERT_ADJUST_STACK_ON_LEAVE;
2003
9a214eec
DM		 2004 if (flags & SVs_PADTMP) {
2005 flags &= ~SVs_PADTMP;
2006 padtmp = 1;
2007 }
b9d76716
VP		 2008 if (gimme == G_SCALAR) {
2009 if (MARK < SP)
9a214eec
DM		 2010 *++newsp = ((SvFLAGS(*SP) & flags) || (padtmp && SvPADTMP(*SP)))
2011 ? *SP : sv_mortalcopy(*SP);
b9d76716
VP		 2012 else {
2013 /* MEXTEND() only updates MARK, so reuse it instead of newsp. */
2014 MARK = newsp;
2015 MEXTEND(MARK, 1);
2016 *++MARK = &PL_sv_undef;
2017 return MARK;
2018 }
2019 }
2020 else if (gimme == G_ARRAY) {
2021 /* in case LEAVE wipes old return values */
2022 while (++MARK <= SP) {
9a214eec 2023 if ((SvFLAGS(*MARK) & flags) || (padtmp && SvPADTMP(*MARK)))
b9d76716
VP		 2024 *++newsp = *MARK;
2025 else {
2026 *++newsp = sv_mortalcopy(*MARK);
2027 TAINT_NOT; /* Each item is independent */
2028 }
2029 }
2030 /* When this function was called with MARK == newsp, we reach this
2031 * point with SP == newsp. */
2032 }
2033
2034 return newsp;
2035}
2036
2b9a6457
VP		 2037PP(pp_enter)
2038{
2039 dVAR; dSP;
2040 register PERL_CONTEXT *cx;
7c2d9d03 2041 I32 gimme = GIMME_V;
2b9a6457
VP		 2042
2043 ENTER_with_name("block");
2044
2045 SAVETMPS;
2046 PUSHBLOCK(cx, CXt_BLOCK, SP);
2047
2048 RETURN;
2049}
2050
2051PP(pp_leave)
2052{
2053 dVAR; dSP;
2054 register PERL_CONTEXT *cx;
2055 SV **newsp;
2056 PMOP *newpm;
2057 I32 gimme;
2058
2059 if (PL_op->op_flags & OPf_SPECIAL) {
2060 cx = &cxstack[cxstack_ix];
2061 cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
2062 }
2063
2064 POPBLOCK(cx,newpm);
2065
2066 gimme = OP_GIMME(PL_op, (cxstack_ix >= 0) ? gimme : G_SCALAR);
2067
2068 TAINT_NOT;
f02ea43c 2069 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP);
2b9a6457
VP		 2070 PL_curpm = newpm; /* Don't pop $1 et al till now */
2071
2072 LEAVE_with_name("block");
2073
2074 RETURN;
2075}
2076
a0d0e21e
LW		 2077PP(pp_enteriter)
2078{
27da23d5 2079 dVAR; dSP; dMARK;
c09156bb 2080 register PERL_CONTEXT *cx;
f54cb97a 2081 const I32 gimme = GIMME_V;
df530c37 2082 void *itervar; /* location of the iteration variable */
840fe433 2083 U8 cxtype = CXt_LOOP_FOR;
a0d0e21e 2084
d343c3ef 2085 ENTER_with_name("loop1");
4633a7c4
LW		 2086 SAVETMPS;
2087
aafca525
DM		 2088 if (PL_op->op_targ) { /* "my" variable */
2089 if (PL_op->op_private & OPpLVAL_INTRO) { /* for my $x (...) */
14f338dc
DM		 2090 SvPADSTALE_off(PAD_SVl(PL_op->op_targ));
2091 SAVESETSVFLAGS(PAD_SVl(PL_op->op_targ),
2092 SVs_PADSTALE, SVs_PADSTALE);
2093 }
09edbca0 2094 SAVEPADSVANDMORTALIZE(PL_op->op_targ);
89e00a7c 2095#ifdef USE_ITHREADS
df530c37 2096 itervar = PL_comppad;
89e00a7c 2097#else
aafca525 2098 itervar = &PAD_SVl(PL_op->op_targ);
7766f137 2099#endif
54b9620d 2100 }
aafca525 2101 else { /* symbol table variable */
159b6efe 2102 GV * const gv = MUTABLE_GV(POPs);
f83b46a0
DM		 2103 SV** svp = &GvSV(gv);
2104 save_pushptrptr(gv, SvREFCNT_inc(*svp), SAVEt_GVSV);
561b68a9 2105 *svp = newSV(0);
df530c37 2106 itervar = (void *)gv;
54b9620d 2107 }
4633a7c4 2108
0d863452
RH		 2109 if (PL_op->op_private & OPpITER_DEF)
2110 cxtype |= CXp_FOR_DEF;
2111
d343c3ef 2112 ENTER_with_name("loop2");
a0d0e21e 2113
7766f137 2114 PUSHBLOCK(cx, cxtype, SP);
df530c37 2115 PUSHLOOP_FOR(cx, itervar, MARK);
533c011a 2116 if (PL_op->op_flags & OPf_STACKED) {
d01136d6
BS		 2117 SV *maybe_ary = POPs;
2118 if (SvTYPE(maybe_ary) != SVt_PVAV) {
89ea2908 2119 dPOPss;
d01136d6 2120 SV * const right = maybe_ary;
984a4bea
RD		 2121 SvGETMAGIC(sv);
2122 SvGETMAGIC(right);
4fe3f0fa 2123 if (RANGE_IS_NUMERIC(sv,right)) {
d01136d6 2124 cx->cx_type &= ~CXTYPEMASK;
c6fdafd0
NC		 2125 cx->cx_type |= CXt_LOOP_LAZYIV;
2126 /* Make sure that no-one re-orders cop.h and breaks our
2127 assumptions */
2128 assert(CxTYPE(cx) == CXt_LOOP_LAZYIV);
a2309040 2129#ifdef NV_PRESERVES_UV
f52e41ad
FC		 2130 if ((SvOK(sv) && ((SvNV_nomg(sv) < (NV)IV_MIN) ||
2131 (SvNV_nomg(sv) > (NV)IV_MAX)))
a2309040 2132 ||
f52e41ad
FC		 2133 (SvOK(right) && ((SvNV_nomg(right) > (NV)IV_MAX) ||
2134 (SvNV_nomg(right) < (NV)IV_MIN))))
a2309040 2135#else
f52e41ad 2136 if ((SvOK(sv) && ((SvNV_nomg(sv) <= (NV)IV_MIN)
a2309040 2137 ||
f52e41ad
FC		 2138 ((SvNV_nomg(sv) > 0) &&
2139 ((SvUV_nomg(sv) > (UV)IV_MAX) ||
2140 (SvNV_nomg(sv) > (NV)UV_MAX)))))
a2309040 2141 ||
f52e41ad 2142 (SvOK(right) && ((SvNV_nomg(right) <= (NV)IV_MIN)
a2309040 2143 ||
f52e41ad
FC		 2144 ((SvNV_nomg(right) > 0) &&
2145 ((SvUV_nomg(right) > (UV)IV_MAX) ||
2146 (SvNV_nomg(right) > (NV)UV_MAX))
2147 ))))
a2309040 2148#endif
076d9a11 2149 DIE(aTHX_ "Range iterator outside integer range");
f52e41ad
FC		 2150 cx->blk_loop.state_u.lazyiv.cur = SvIV_nomg(sv);
2151 cx->blk_loop.state_u.lazyiv.end = SvIV_nomg(right);
d4665a05
DM		 2152#ifdef DEBUGGING
2153 /* for correct -Dstv display */
2154 cx->blk_oldsp = sp - PL_stack_base;
2155#endif
89ea2908 2156 }
3f63a782 2157 else {
d01136d6
BS		 2158 cx->cx_type &= ~CXTYPEMASK;
2159 cx->cx_type |= CXt_LOOP_LAZYSV;
2160 /* Make sure that no-one re-orders cop.h and breaks our
2161 assumptions */
2162 assert(CxTYPE(cx) == CXt_LOOP_LAZYSV);
2163 cx->blk_loop.state_u.lazysv.cur = newSVsv(sv);
2164 cx->blk_loop.state_u.lazysv.end = right;
2165 SvREFCNT_inc(right);
2166 (void) SvPV_force_nolen(cx->blk_loop.state_u.lazysv.cur);
267cc4a8
NC		 2167 /* This will do the upgrade to SVt_PV, and warn if the value
2168 is uninitialised. */
10516c54 2169 (void) SvPV_nolen_const(right);
267cc4a8
NC		 2170 /* Doing this avoids a check every time in pp_iter in pp_hot.c
2171 to replace !SvOK() with a pointer to "". */
2172 if (!SvOK(right)) {
2173 SvREFCNT_dec(right);
d01136d6 2174 cx->blk_loop.state_u.lazysv.end = &PL_sv_no;
267cc4a8 2175 }
3f63a782 2176 }
89ea2908 2177 }
d01136d6 2178 else /* SvTYPE(maybe_ary) == SVt_PVAV */ {
502c6561 2179 cx->blk_loop.state_u.ary.ary = MUTABLE_AV(maybe_ary);
d01136d6
BS		 2180 SvREFCNT_inc(maybe_ary);
2181 cx->blk_loop.state_u.ary.ix =
2182 (PL_op->op_private & OPpITER_REVERSED) ?
2183 AvFILL(cx->blk_loop.state_u.ary.ary) + 1 :
2184 -1;
ef3e5ea9 2185 }
89ea2908 2186 }
d01136d6
BS		 2187 else { /* iterating over items on the stack */
2188 cx->blk_loop.state_u.ary.ary = NULL; /* means to use the stack */
ef3e5ea9 2189 if (PL_op->op_private & OPpITER_REVERSED) {
d01136d6 2190 cx->blk_loop.state_u.ary.ix = cx->blk_oldsp + 1;
ef3e5ea9
NC		 2191 }
2192 else {
d01136d6 2193 cx->blk_loop.state_u.ary.ix = MARK - PL_stack_base;
ef3e5ea9 2194 }
4633a7c4 2195 }
a0d0e21e
LW		 2196
2197 RETURN;
2198}
2199
2200PP(pp_enterloop)
2201{
27da23d5 2202 dVAR; dSP;
c09156bb 2203 register PERL_CONTEXT *cx;
f54cb97a 2204 const I32 gimme = GIMME_V;
a0d0e21e 2205
d343c3ef 2206 ENTER_with_name("loop1");
a0d0e21e 2207 SAVETMPS;
d343c3ef 2208 ENTER_with_name("loop2");
a0d0e21e 2209
3b719c58
NC		 2210 PUSHBLOCK(cx, CXt_LOOP_PLAIN, SP);
2211 PUSHLOOP_PLAIN(cx, SP);
a0d0e21e
LW		 2212
2213 RETURN;
2214}
2215
2216PP(pp_leaveloop)
2217{
27da23d5 2218 dVAR; dSP;
c09156bb 2219 register PERL_CONTEXT *cx;
a0d0e21e
LW		 2220 I32 gimme;
2221 SV **newsp;
2222 PMOP *newpm;
2223 SV **mark;
2224
2225 POPBLOCK(cx,newpm);
3b719c58 2226 assert(CxTYPE_is_LOOP(cx));
4fdae800 2227 mark = newsp;
a8bba7fa 2228 newsp = PL_stack_base + cx->blk_loop.resetsp;
f86702cc 2229
a1f49e72 2230 TAINT_NOT;
b9d76716 2231 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme, 0);
f86702cc 2232 PUTBACK;
2233
a8bba7fa 2234 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
3280af22 2235 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2236
d343c3ef
GG		 2237 LEAVE_with_name("loop2");
2238 LEAVE_with_name("loop1");
a0d0e21e 2239
f86702cc 2240 return NORMAL;
a0d0e21e
LW		 2241}
2242
3bdf583b
FC		 2243STATIC void
2244S_return_lvalues(pTHX_ SV **mark, SV **sp, SV **newsp, I32 gimme,
d25b0d7b 2245 PERL_CONTEXT *cx, PMOP *newpm)
3bdf583b 2246{
80422e24 2247 const bool ref = !!(CxLVAL(cx) & OPpENTERSUB_INARGS);
3bdf583b 2248 if (gimme == G_SCALAR) {
d25b0d7b
FC		 2249 if (CxLVAL(cx) && !ref) { /* Leave it as it is if we can. */
2250 SV *sv;
001de122 2251 const char *what = NULL;
d25b0d7b
FC		 2252 if (MARK < SP) {
2253 assert(MARK+1 == SP);
2254 if ((SvPADTMP(TOPs) ||
2255 (SvFLAGS(TOPs) & (SVf_READONLY | SVf_FAKE))
2256 == SVf_READONLY
2257 ) &&
2258 !SvSMAGICAL(TOPs)) {
001de122 2259 what =
d25b0d7b 2260 SvREADONLY(TOPs) ? (TOPs == &PL_sv_undef) ? "undef"
001de122 2261 : "a readonly value" : "a temporary";
d25b0d7b 2262 }
001de122 2263 else goto copy_sv;
d25b0d7b
FC		 2264 }
2265 else {
2266 /* sub:lvalue{} will take us here. */
001de122 2267 what = "undef";
d25b0d7b 2268 }
001de122
FC		 2269 LEAVE;
2270 cxstack_ix--;
2271 POPSUB(cx,sv);
2272 PL_curpm = newpm;
2273 LEAVESUB(sv);
2274 Perl_croak(aTHX_
2275 "Can't return %s from lvalue subroutine", what
2276 );
d25b0d7b 2277 }
93905212 2278 if (MARK < SP) {
a5ad7a5a 2279 copy_sv:
3bdf583b 2280 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
5811c07e 2281 if (!SvPADTMP(*SP)) {
3bdf583b
FC		 2282 *++newsp = SvREFCNT_inc(*SP);
2283 FREETMPS;
2284 sv_2mortal(*newsp);
5811c07e
FC		 2285 }
2286 else {
2287 /* FREETMPS could clobber it */
2288 SV *sv = SvREFCNT_inc(*SP);
2289 FREETMPS;
2290 *++newsp = sv_mortalcopy(sv);
2291 SvREFCNT_dec(sv);
2292 }
3bdf583b
FC		 2293 }
2294 else
e08be60b 2295 *++newsp =
5811c07e
FC		 2296 SvPADTMP(*SP)
2297 ? sv_mortalcopy(*SP)
2298 : !SvTEMP(*SP)
e08be60b
FC		 2299 ? sv_2mortal(SvREFCNT_inc_simple_NN(*SP))
2300 : *SP;
3bdf583b 2301 }
0d235c77
FC		 2302 else {
2303 EXTEND(newsp,1);
3bdf583b 2304 *++newsp = &PL_sv_undef;
0d235c77 2305 }
0e9700df 2306 if (CxLVAL(cx) & OPpDEREF) {
767eda44
FC		 2307 SvGETMAGIC(TOPs);
2308 if (!SvOK(TOPs)) {
0e9700df 2309 TOPs = vivify_ref(TOPs, CxLVAL(cx) & OPpDEREF);
767eda44
FC		 2310 }
2311 }
3bdf583b
FC		 2312 }
2313 else if (gimme == G_ARRAY) {
0e9700df 2314 assert (!(CxLVAL(cx) & OPpDEREF));
80422e24 2315 if (ref || !CxLVAL(cx))
e08be60b
FC		 2316 while (++MARK <= SP)
2317 *++newsp =
5811c07e 2318 SvFLAGS(*MARK) & SVs_PADTMP
80422e24 2319 ? sv_mortalcopy(*MARK)
5811c07e
FC		 2320 : SvTEMP(*MARK)
2321 ? *MARK
80422e24 2322 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
e08be60b 2323 else while (++MARK <= SP) {
d25b0d7b
FC		 2324 if (*MARK != &PL_sv_undef
2325 && (SvPADTMP(*MARK)
2326 || (SvFLAGS(*MARK) & (SVf_READONLY|SVf_FAKE))
2327 == SVf_READONLY
2328 )
2329 ) {
2330 SV *sv;
2331 /* Might be flattened array after $#array = */
2332 PUTBACK;
2333 LEAVE;
2334 cxstack_ix--;
2335 POPSUB(cx,sv);
2336 PL_curpm = newpm;
2337 LEAVESUB(sv);
ae917476 2338 /* diag_listed_as: Can't return %s from lvalue subroutine */
d25b0d7b
FC		 2339 Perl_croak(aTHX_
2340 "Can't return a %s from lvalue subroutine",
2341 SvREADONLY(TOPs) ? "readonly value" : "temporary");
2342 }
2343 else
4bee03f8
FC		 2344 *++newsp =
2345 SvTEMP(*MARK)
2346 ? *MARK
2347 : sv_2mortal(SvREFCNT_inc_simple_NN(*MARK));
3bdf583b
FC		 2348 }
2349 }
2350 PL_stack_sp = newsp;
2351}
2352
a0d0e21e
LW		 2353PP(pp_return)
2354{
27da23d5 2355 dVAR; dSP; dMARK;
c09156bb 2356 register PERL_CONTEXT *cx;
f86702cc 2357 bool popsub2 = FALSE;
b45de488 2358 bool clear_errsv = FALSE;
fa1e92c4 2359 bool lval = FALSE;
a0d0e21e
LW		 2360 I32 gimme;
2361 SV **newsp;
2362 PMOP *newpm;
2363 I32 optype = 0;
b6494f15 2364 SV *namesv;
b0d9ce38 2365 SV *sv;
b263a1ad 2366 OP *retop = NULL;
a0d0e21e 2367
0bd48802
AL		 2368 const I32 cxix = dopoptosub(cxstack_ix);
2369
9850bf21
RH		 2370 if (cxix < 0) {
2371 if (CxMULTICALL(cxstack)) { /* In this case we must be in a
2372 * sort block, which is a CXt_NULL
2373 * not a CXt_SUB */
2374 dounwind(0);
d7507f74
RH		 2375 PL_stack_base[1] = *PL_stack_sp;
2376 PL_stack_sp = PL_stack_base + 1;
a0d0e21e
LW		 2377 return 0;
2378 }
9850bf21
RH		 2379 else
2380 DIE(aTHX_ "Can't return outside a subroutine");
a0d0e21e 2381 }
a0d0e21e
LW		 2382 if (cxix < cxstack_ix)
2383 dounwind(cxix);
2384
d7507f74
RH		 2385 if (CxMULTICALL(&cxstack[cxix])) {
2386 gimme = cxstack[cxix].blk_gimme;
2387 if (gimme == G_VOID)
2388 PL_stack_sp = PL_stack_base;
2389 else if (gimme == G_SCALAR) {
2390 PL_stack_base[1] = *PL_stack_sp;
2391 PL_stack_sp = PL_stack_base + 1;
2392 }
9850bf21 2393 return 0;
d7507f74 2394 }
9850bf21 2395
a0d0e21e 2396 POPBLOCK(cx,newpm);
6b35e009 2397 switch (CxTYPE(cx)) {
a0d0e21e 2398 case CXt_SUB:
f86702cc 2399 popsub2 = TRUE;
fa1e92c4 2400 lval = !!CvLVALUE(cx->blk_sub.cv);
f39bc417 2401 retop = cx->blk_sub.retop;
5dd42e15 2402 cxstack_ix++; /* preserve cx entry on stack for use by POPSUB */
a0d0e21e
LW		 2403 break;
2404 case CXt_EVAL:
b45de488
GS		 2405 if (!(PL_in_eval & EVAL_KEEPERR))
2406 clear_errsv = TRUE;
a0d0e21e 2407 POPEVAL(cx);
b6494f15 2408 namesv = cx->blk_eval.old_namesv;
f39bc417 2409 retop = cx->blk_eval.retop;
1d76a5c3
GS		 2410 if (CxTRYBLOCK(cx))
2411 break;
748a9306
LW		 2412 if (optype == OP_REQUIRE &&
2413 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
2414 {
54310121 2415 /* Unassume the success we assumed earlier. */
b6494f15 2416 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 2417 SvPVX_const(namesv),
c60dbbc3 2418 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15
VP		 2419 G_DISCARD);
2420 DIE(aTHX_ "%"SVf" did not return a true value", SVfARG(namesv));
748a9306 2421 }
a0d0e21e 2422 break;
7766f137
GS		 2423 case CXt_FORMAT:
2424 POPFORMAT(cx);
f39bc417 2425 retop = cx->blk_sub.retop;
7766f137 2426 break;
a0d0e21e 2427 default:
5637ef5b 2428 DIE(aTHX_ "panic: return, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW		 2429 }
2430
a1f49e72 2431 TAINT_NOT;
d25b0d7b 2432 if (lval) S_return_lvalues(aTHX_ MARK, SP, newsp, gimme, cx, newpm);
3bdf583b
FC		 2433 else {
2434 if (gimme == G_SCALAR) {
a29cdaf0
IZ		 2435 if (MARK < SP) {
2436 if (popsub2) {
a8bba7fa 2437 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
6f48390a
FC		 2438 if (SvTEMP(TOPs) && SvREFCNT(TOPs) == 1
2439 && !SvMAGICAL(TOPs)) {
a29cdaf0
IZ		 2440 *++newsp = SvREFCNT_inc(*SP);
2441 FREETMPS;
2442 sv_2mortal(*newsp);
959e3673
GS		 2443 }
2444 else {
2445 sv = SvREFCNT_inc(*SP); /* FREETMPS could clobber it */
a29cdaf0 2446 FREETMPS;
959e3673
GS		 2447 *++newsp = sv_mortalcopy(sv);
2448 SvREFCNT_dec(sv);
a29cdaf0 2449 }
959e3673 2450 }
6f48390a
FC		 2451 else if (SvTEMP(*SP) && SvREFCNT(*SP) == 1
2452 && !SvMAGICAL(*SP)) {
767eda44 2453 *++newsp = *SP;
767eda44 2454 }
959e3673 2455 else
767eda44 2456 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2457 }
2458 else
a29cdaf0 2459 *++newsp = sv_mortalcopy(*SP);
959e3673
GS		 2460 }
2461 else
3280af22 2462 *++newsp = &PL_sv_undef;
3bdf583b
FC		 2463 }
2464 else if (gimme == G_ARRAY) {
a1f49e72 2465 while (++MARK <= SP) {
3ed94dc0 2466 *++newsp = popsub2 && SvTEMP(*MARK) && SvREFCNT(*MARK) == 1
6f48390a 2467 && !SvGMAGICAL(*MARK)
f86702cc 2468 ? *MARK : sv_mortalcopy(*MARK);
a1f49e72
CS		 2469 TAINT_NOT; /* Each item is independent */
2470 }
3bdf583b
FC		 2471 }
2472 PL_stack_sp = newsp;
a0d0e21e 2473 }
a0d0e21e 2474
5dd42e15 2475 LEAVE;
f86702cc 2476 /* Stack values are safe: */
2477 if (popsub2) {
5dd42e15 2478 cxstack_ix--;
b0d9ce38 2479 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2480 }
b0d9ce38 2481 else
c445ea15 2482 sv = NULL;
3280af22 2483 PL_curpm = newpm; /* ... and pop $1 et al */
f86702cc 2484
b0d9ce38 2485 LEAVESUB(sv);
8433848b 2486 if (clear_errsv) {
ab69dbc2 2487 CLEAR_ERRSV();
8433848b 2488 }
f39bc417 2489 return retop;
a0d0e21e
LW		 2490}
2491
4f443c3d
FC		 2492/* This duplicates parts of pp_leavesub, so that it can share code with
2493 * pp_return */
2494PP(pp_leavesublv)
2495{
2496 dVAR; dSP;
4f443c3d
FC		 2497 SV **newsp;
2498 PMOP *newpm;
2499 I32 gimme;
2500 register PERL_CONTEXT *cx;
2501 SV *sv;
2502
2503 if (CxMULTICALL(&cxstack[cxstack_ix]))
2504 return 0;
2505
2506 POPBLOCK(cx,newpm);
2507 cxstack_ix++; /* temporarily protect top context */
4f443c3d
FC		 2508
2509 TAINT_NOT;
2510
0d235c77 2511 S_return_lvalues(aTHX_ newsp, SP, newsp, gimme, cx, newpm);
4f443c3d
FC		 2512
2513 LEAVE;
2514 cxstack_ix--;
2515 POPSUB(cx,sv); /* Stack values are safe: release CV and @_ ... */
2516 PL_curpm = newpm; /* ... and pop $1 et al */
2517
2518 LEAVESUB(sv);
2519 return cx->blk_sub.retop;
2520}
2521
a0d0e21e
LW		 2522PP(pp_last)
2523{
27da23d5 2524 dVAR; dSP;
a0d0e21e 2525 I32 cxix;
c09156bb 2526 register PERL_CONTEXT *cx;
f86702cc 2527 I32 pop2 = 0;
a0d0e21e 2528 I32 gimme;
8772537c 2529 I32 optype;
b263a1ad 2530 OP *nextop = NULL;
a0d0e21e
LW		 2531 SV **newsp;
2532 PMOP *newpm;
a8bba7fa 2533 SV **mark;
c445ea15 2534 SV *sv = NULL;
9d4ba2ae 2535
a0d0e21e 2536
533c011a 2537 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2538 cxix = dopoptoloop(cxstack_ix);
2539 if (cxix < 0)
a651a37d 2540 DIE(aTHX_ "Can't \"last\" outside a loop block");
a0d0e21e
LW		 2541 }
2542 else {
5db1eb8d
BF		 2543 cxix = dopoptolabel(cPVOP->op_pv, strlen(cPVOP->op_pv),
2544 (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0);
a0d0e21e 2545 if (cxix < 0)
5db1eb8d
BF		 2546 DIE(aTHX_ "Label not found for \"last %"SVf"\"",
2547 SVfARG(newSVpvn_flags(cPVOP->op_pv,
2548 strlen(cPVOP->op_pv),
2549 ((cPVOP->op_private & OPpPV_IS_UTF8)
2550 ? SVf_UTF8 : 0) | SVs_TEMP)));
a0d0e21e
LW		 2551 }
2552 if (cxix < cxstack_ix)
2553 dounwind(cxix);
2554
2555 POPBLOCK(cx,newpm);
5dd42e15 2556 cxstack_ix++; /* temporarily protect top context */
a8bba7fa 2557 mark = newsp;
6b35e009 2558 switch (CxTYPE(cx)) {
c6fdafd0 2559 case CXt_LOOP_LAZYIV:
d01136d6 2560 case CXt_LOOP_LAZYSV:
3b719c58
NC		 2561 case CXt_LOOP_FOR:
2562 case CXt_LOOP_PLAIN:
2563 pop2 = CxTYPE(cx);
a8bba7fa 2564 newsp = PL_stack_base + cx->blk_loop.resetsp;
022eaa24 2565 nextop = cx->blk_loop.my_op->op_lastop->op_next;
a0d0e21e 2566 break;
f86702cc 2567 case CXt_SUB:
f86702cc 2568 pop2 = CXt_SUB;
f39bc417 2569 nextop = cx->blk_sub.retop;
a0d0e21e 2570 break;
f86702cc 2571 case CXt_EVAL:
2572 POPEVAL(cx);
f39bc417 2573 nextop = cx->blk_eval.retop;
a0d0e21e 2574 break;
7766f137
GS		 2575 case CXt_FORMAT:
2576 POPFORMAT(cx);
f39bc417 2577 nextop = cx->blk_sub.retop;
7766f137 2578 break;
a0d0e21e 2579 default:
5637ef5b 2580 DIE(aTHX_ "panic: last, type=%u", (unsigned) CxTYPE(cx));
a0d0e21e
LW		 2581 }
2582
a1f49e72 2583 TAINT_NOT;
b9d76716
VP		 2584 SP = adjust_stack_on_leave(newsp, SP, MARK, gimme,
2585 pop2 == CXt_SUB ? SVs_TEMP : 0);
f86702cc 2586 PUTBACK;
2587
5dd42e15
DM		 2588 LEAVE;
2589 cxstack_ix--;
f86702cc 2590 /* Stack values are safe: */
2591 switch (pop2) {
c6fdafd0 2592 case CXt_LOOP_LAZYIV:
3b719c58 2593 case CXt_LOOP_PLAIN:
d01136d6 2594 case CXt_LOOP_LAZYSV:
3b719c58 2595 case CXt_LOOP_FOR:
a8bba7fa 2596 POPLOOP(cx); /* release loop vars ... */
4fdae800 2597 LEAVE;
f86702cc 2598 break;
2599 case CXt_SUB:
b0d9ce38 2600 POPSUB(cx,sv); /* release CV and @_ ... */
f86702cc 2601 break;
a0d0e21e 2602 }
3280af22 2603 PL_curpm = newpm; /* ... and pop $1 et al */
a0d0e21e 2604
b0d9ce38 2605 LEAVESUB(sv);
9d4ba2ae
AL		 2606 PERL_UNUSED_VAR(optype);
2607 PERL_UNUSED_VAR(gimme);
f86702cc 2608 return nextop;
a0d0e21e
LW		 2609}
2610
2611PP(pp_next)
2612{
27da23d5 2613 dVAR;
a0d0e21e 2614 I32 cxix;
c09156bb 2615 register PERL_CONTEXT *cx;
85538317 2616 I32 inner;
a0d0e21e 2617
533c011a 2618 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2619 cxix = dopoptoloop(cxstack_ix);
2620 if (cxix < 0)
a651a37d 2621 DIE(aTHX_ "Can't \"next\" outside a loop block");
a0d0e21e
LW		 2622 }
2623 else {
5db1eb8d
BF		 2624 cxix = dopoptolabel(cPVOP->op_pv, strlen(cPVOP->op_pv),
2625 (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0);
2626 if (cxix < 0)
2627 DIE(aTHX_ "Label not found for \"next %"SVf"\"",
2628 SVfARG(newSVpvn_flags(cPVOP->op_pv,
2629 strlen(cPVOP->op_pv),
2630 ((cPVOP->op_private & OPpPV_IS_UTF8)
2631 ? SVf_UTF8 : 0) | SVs_TEMP)));
a0d0e21e
LW		 2632 }
2633 if (cxix < cxstack_ix)
2634 dounwind(cxix);
2635
85538317
GS		 2636 /* clear off anything above the scope we're re-entering, but
2637 * save the rest until after a possible continue block */
2638 inner = PL_scopestack_ix;
1ba6ee2b 2639 TOPBLOCK(cx);
85538317
GS		 2640 if (PL_scopestack_ix < inner)
2641 leave_scope(PL_scopestack[PL_scopestack_ix]);
3a1b2b9e 2642 PL_curcop = cx->blk_oldcop;
d57ce4df 2643 return (cx)->blk_loop.my_op->op_nextop;
a0d0e21e
LW		 2644}
2645
2646PP(pp_redo)
2647{
27da23d5 2648 dVAR;
a0d0e21e 2649 I32 cxix;
c09156bb 2650 register PERL_CONTEXT *cx;
a0d0e21e 2651 I32 oldsave;
a034e688 2652 OP* redo_op;
a0d0e21e 2653
533c011a 2654 if (PL_op->op_flags & OPf_SPECIAL) {
a0d0e21e
LW		 2655 cxix = dopoptoloop(cxstack_ix);
2656 if (cxix < 0)
a651a37d 2657 DIE(aTHX_ "Can't \"redo\" outside a loop block");
a0d0e21e
LW		 2658 }
2659 else {
5db1eb8d
BF		 2660 cxix = dopoptolabel(cPVOP->op_pv, strlen(cPVOP->op_pv),
2661 (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0);
2662 if (cxix < 0)
2663 DIE(aTHX_ "Label not found for \"redo %"SVf"\"",
2664 SVfARG(newSVpvn_flags(cPVOP->op_pv,
2665 strlen(cPVOP->op_pv),
2666 ((cPVOP->op_private & OPpPV_IS_UTF8)
2667 ? SVf_UTF8 : 0) | SVs_TEMP)));
a0d0e21e
LW		 2668 }
2669 if (cxix < cxstack_ix)
2670 dounwind(cxix);
2671
022eaa24 2672 redo_op = cxstack[cxix].blk_loop.my_op->op_redoop;
a034e688
DM		 2673 if (redo_op->op_type == OP_ENTER) {
2674 /* pop one less context to avoid $x being freed in while (my $x..) */
2675 cxstack_ix++;
2676 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_BLOCK);
2677 redo_op = redo_op->op_next;
2678 }
2679
a0d0e21e 2680 TOPBLOCK(cx);
3280af22 2681 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e 2682 LEAVE_SCOPE(oldsave);
936c78b5 2683 FREETMPS;
3a1b2b9e 2684 PL_curcop = cx->blk_oldcop;
a034e688 2685 return redo_op;
a0d0e21e
LW		 2686}
2687
0824fdcb 2688STATIC OP *
5db1eb8d 2689S_dofindlabel(pTHX_ OP *o, const char *label, STRLEN len, U32 flags, OP **opstack, OP **oplimit)
a0d0e21e 2690{
97aff369 2691 dVAR;
a0d0e21e 2692 OP **ops = opstack;
bfed75c6 2693 static const char too_deep[] = "Target of goto is too deeply nested";
a0d0e21e 2694
7918f24d
NC		 2695 PERL_ARGS_ASSERT_DOFINDLABEL;
2696
fc36a67e 2697 if (ops >= oplimit)
cea2e8a9 2698 Perl_croak(aTHX_ too_deep);
11343788
MB		 2699 if (o->op_type == OP_LEAVE ||
2700 o->op_type == OP_SCOPE ||
2701 o->op_type == OP_LEAVELOOP ||
33d34e4c 2702 o->op_type == OP_LEAVESUB ||
11343788 2703 o->op_type == OP_LEAVETRY)
fc36a67e 2704 {
5dc0d613 2705 *ops++ = cUNOPo->op_first;
fc36a67e 2706 if (ops >= oplimit)
cea2e8a9 2707 Perl_croak(aTHX_ too_deep);
fc36a67e 2708 }
c4aa4e48 2709 *ops = 0;
11343788 2710 if (o->op_flags & OPf_KIDS) {
aec46f14 2711 OP *kid;
a0d0e21e 2712 /* First try all the kids at this level, since that's likeliest. */
11343788 2713 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
7e8f1eac 2714 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
5db1eb8d
BF		 2715 STRLEN kid_label_len;
2716 U32 kid_label_flags;
2717 const char *kid_label = CopLABEL_len_flags(kCOP,
2718 &kid_label_len, &kid_label_flags);
2719 if (kid_label && (
2720 ( (kid_label_flags & SVf_UTF8) != (flags & SVf_UTF8) ) ?
2721 (flags & SVf_UTF8)
2722 ? (bytes_cmp_utf8(
2723 (const U8*)kid_label, kid_label_len,
2724 (const U8*)label, len) == 0)
2725 : (bytes_cmp_utf8(
2726 (const U8*)label, len,
2727 (const U8*)kid_label, kid_label_len) == 0)
eade7155
BF		 2728 : ( len == kid_label_len && ((kid_label == label)
2729 || memEQ(kid_label, label, len)))))
7e8f1eac
AD		 2730 return kid;
2731 }
a0d0e21e 2732 }
11343788 2733 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
3280af22 2734 if (kid == PL_lastgotoprobe)
a0d0e21e 2735 continue;
ed8d0fe2
SM		 2736 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
2737 if (ops == opstack)
2738 *ops++ = kid;
2739 else if (ops[-1]->op_type == OP_NEXTSTATE ||
2740 ops[-1]->op_type == OP_DBSTATE)
2741 ops[-1] = kid;
2742 else
2743 *ops++ = kid;
2744 }
5db1eb8d 2745 if ((o = dofindlabel(kid, label, len, flags, ops, oplimit)))
11343788 2746 return o;
a0d0e21e
LW		 2747 }
2748 }
c4aa4e48 2749 *ops = 0;
a0d0e21e
LW		 2750 return 0;
2751}
2752
a0d0e21e
LW		 2753PP(pp_goto)
2754{
27da23d5 2755 dVAR; dSP;
cbbf8932 2756 OP *retop = NULL;
a0d0e21e 2757 I32 ix;
c09156bb 2758 register PERL_CONTEXT *cx;
fc36a67e 2759#define GOTO_DEPTH 64
2760 OP *enterops[GOTO_DEPTH];
cbbf8932 2761 const char *label = NULL;
5db1eb8d
BF		 2762 STRLEN label_len = 0;
2763 U32 label_flags = 0;
bfed75c6
AL		 2764 const bool do_dump = (PL_op->op_type == OP_DUMP);
2765 static const char must_have_label[] = "goto must have label";
a0d0e21e 2766
533c011a 2767 if (PL_op->op_flags & OPf_STACKED) {
9d4ba2ae 2768 SV * const sv = POPs;
a0d0e21e
LW		 2769
2770 /* This egregious kludge implements goto &subroutine */
2771 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
2772 I32 cxix;
c09156bb 2773 register PERL_CONTEXT *cx;
ea726b52 2774 CV *cv = MUTABLE_CV(SvRV(sv));
a0d0e21e
LW		 2775 SV** mark;
2776 I32 items = 0;
2777 I32 oldsave;
b1464ded 2778 bool reified = 0;
a0d0e21e 2779
e8f7dd13 2780 retry:
4aa0a1f7 2781 if (!CvROOT(cv) && !CvXSUB(cv)) {
7fc63493 2782 const GV * const gv = CvGV(cv);
e8f7dd13 2783 if (gv) {
7fc63493 2784 GV *autogv;
e8f7dd13
GS		 2785 SV *tmpstr;
2786 /* autoloaded stub? */
2787 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2788 goto retry;
c271df94
BF		 2789 autogv = gv_autoload_pvn(GvSTASH(gv), GvNAME(gv),
2790 GvNAMELEN(gv),
2791 GvNAMEUTF8(gv) ? SVf_UTF8 : 0);
e8f7dd13
GS		 2792 if (autogv && (cv = GvCV(autogv)))
2793 goto retry;
2794 tmpstr = sv_newmortal();
c445ea15 2795 gv_efullname3(tmpstr, gv, NULL);
be2597df 2796 DIE(aTHX_ "Goto undefined subroutine &%"SVf"", SVfARG(tmpstr));
4aa0a1f7 2797 }
cea2e8a9 2798 DIE(aTHX_ "Goto undefined subroutine");
4aa0a1f7
AD		 2799 }
2800
a0d0e21e 2801 /* First do some returnish stuff. */
b37c2d43 2802 SvREFCNT_inc_simple_void(cv); /* avoid premature free during unwind */
71fc2216 2803 FREETMPS;
a0d0e21e
LW		 2804 cxix = dopoptosub(cxstack_ix);
2805 if (cxix < 0)
cea2e8a9 2806 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
a0d0e21e
LW		 2807 if (cxix < cxstack_ix)
2808 dounwind(cxix);
2809 TOPBLOCK(cx);
2d43a17f 2810 SPAGAIN;
564abe23 2811 /* ban goto in eval: see <20050521150056.GC20213@iabyn.com> */
2d43a17f 2812 if (CxTYPE(cx) == CXt_EVAL) {
c74ace89 2813 if (CxREALEVAL(cx))
00455a92 2814 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89
DM		 2815 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2816 else
00455a92 2817 /* diag_listed_as: Can't goto subroutine from an eval-%s */
c74ace89 2818 DIE(aTHX_ "Can't goto subroutine from an eval-block");
2d43a17f 2819 }
9850bf21
RH		 2820 else if (CxMULTICALL(cx))
2821 DIE(aTHX_ "Can't goto subroutine from a sort sub (or similar callback)");
bafb2adc 2822 if (CxTYPE(cx) == CXt_SUB && CxHASARGS(cx)) {
d8b46c1b 2823 /* put @_ back onto stack */
a0d0e21e 2824 AV* av = cx->blk_sub.argarray;
bfed75c6 2825
93965878 2826 items = AvFILLp(av) + 1;
a45cdc79
DM		 2827 EXTEND(SP, items+1); /* @_ could have been extended. */
2828 Copy(AvARRAY(av), SP + 1, items, SV*);
3280af22
NIS		 2829 SvREFCNT_dec(GvAV(PL_defgv));
2830 GvAV(PL_defgv) = cx->blk_sub.savearray;
b1464ded 2831 CLEAR_ARGARRAY(av);
d8b46c1b 2832 /* abandon @_ if it got reified */
62b1ebc2 2833 if (AvREAL(av)) {
b1464ded
DM		 2834 reified = 1;
2835 SvREFCNT_dec(av);
d8b46c1b
GS		 2836 av = newAV();
2837 av_extend(av, items-1);
11ca45c0 2838 AvREIFY_only(av);
ad64d0ec 2839 PAD_SVl(0) = MUTABLE_SV(cx->blk_sub.argarray = av);
62b1ebc2 2840 }
a0d0e21e 2841 }
aed2304a 2842 else if (CvISXSUB(cv)) { /* put GvAV(defgv) back onto stack */
890ce7af 2843 AV* const av = GvAV(PL_defgv);
1fa4e549 2844 items = AvFILLp(av) + 1;
a45cdc79
DM		 2845 EXTEND(SP, items+1); /* @_ could have been extended. */
2846 Copy(AvARRAY(av), SP + 1, items, SV*);
1fa4e549 2847 }
a45cdc79
DM		 2848 mark = SP;
2849 SP += items;
6b35e009 2850 if (CxTYPE(cx) == CXt_SUB &&
b150fb22 2851 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
a0d0e21e 2852 SvREFCNT_dec(cx->blk_sub.cv);
3280af22 2853 oldsave = PL_scopestack[PL_scopestack_ix - 1];
a0d0e21e
LW		 2854 LEAVE_SCOPE(oldsave);
2855
1d59c038
FC		 2856 /* A destructor called during LEAVE_SCOPE could have undefined
2857 * our precious cv. See bug #99850. */
2858 if (!CvROOT(cv) && !CvXSUB(cv)) {
2859 const GV * const gv = CvGV(cv);
2860 if (gv) {
2861 SV * const tmpstr = sv_newmortal();
2862 gv_efullname3(tmpstr, gv, NULL);
2863 DIE(aTHX_ "Goto undefined subroutine &%"SVf"",
2864 SVfARG(tmpstr));
2865 }
2866 DIE(aTHX_ "Goto undefined subroutine");
2867 }
2868
a0d0e21e
LW		 2869 /* Now do some callish stuff. */
2870 SAVETMPS;
5023d17a 2871 SAVEFREESV(cv); /* later, undo the 'avoid premature free' hack */
aed2304a 2872 if (CvISXSUB(cv)) {
b37c2d43 2873 OP* const retop = cx->blk_sub.retop;
9d63fa07
KW		 2874 SV **newsp PERL_UNUSED_DECL;
2875 I32 gimme PERL_UNUSED_DECL;
b1464ded
DM		 2876 if (reified) {
2877 I32 index;
2878 for (index=0; index<items; index++)
2879 sv_2mortal(SP[-index]);
2880 }
1fa4e549 2881
b37c2d43
AL		 2882 /* XS subs don't have a CxSUB, so pop it */
2883 POPBLOCK(cx, PL_curpm);
2884 /* Push a mark for the start of arglist */
2885 PUSHMARK(mark);
2886 PUTBACK;
2887 (void)(*CvXSUB(cv))(aTHX_ cv);
a57c6685 2888 LEAVE;
5eff7df7 2889 return retop;
a0d0e21e
LW		 2890 }
2891 else {
b37c2d43 2892 AV* const padlist = CvPADLIST(cv);
6b35e009 2893 if (CxTYPE(cx) == CXt_EVAL) {
85a64632 2894 PL_in_eval = CxOLD_IN_EVAL(cx);
3280af22 2895 PL_eval_root = cx->blk_eval.old_eval_root;
b150fb22 2896 cx->cx_type = CXt_SUB;
b150fb22 2897 }
a0d0e21e 2898 cx->blk_sub.cv = cv;
1a5b3db4 2899 cx->blk_sub.olddepth = CvDEPTH(cv);
dd2155a4 2900
a0d0e21e
LW		 2901 CvDEPTH(cv)++;
2902 if (CvDEPTH(cv) < 2)
74c765eb 2903 SvREFCNT_inc_simple_void_NN(cv);
dd2155a4 2904 else {
2b9dff67 2905 if (CvDEPTH(cv) == PERL_SUB_DEPTH_WARN && ckWARN(WARN_RECURSION))
44a8e56a 2906 sub_crush_depth(cv);
26019298 2907 pad_push(padlist, CvDEPTH(cv));
a0d0e21e 2908 }
426a09cd 2909 PL_curcop = cx->blk_oldcop;
fd617465
DM		 2910 SAVECOMPPAD();
2911 PAD_SET_CUR_NOSAVE(padlist, CvDEPTH(cv));
bafb2adc 2912 if (CxHASARGS(cx))
6d4ff0d2 2913 {
502c6561 2914 AV *const av = MUTABLE_AV(PAD_SVl(0));
a0d0e21e 2915
3280af22 2916 cx->blk_sub.savearray = GvAV(PL_defgv);
502c6561 2917 GvAV(PL_defgv) = MUTABLE_AV(SvREFCNT_inc_simple(av));
dd2155a4 2918 CX_CURPAD_SAVE(cx->blk_sub);
6d4ff0d2 2919 cx->blk_sub.argarray = av;
a0d0e21e
LW		 2920
2921 if (items >= AvMAX(av) + 1) {
b37c2d43 2922 SV **ary = AvALLOC(av);
a0d0e21e
LW		 2923 if (AvARRAY(av) != ary) {
2924 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
9c6bc640 2925 AvARRAY(av) = ary;
a0d0e21e
LW		 2926 }
2927 if (items >= AvMAX(av) + 1) {
2928 AvMAX(av) = items - 1;
2929 Renew(ary,items+1,SV*);
2930 AvALLOC(av) = ary;
9c6bc640 2931 AvARRAY(av) = ary;
a0d0e21e
LW		 2932 }
2933 }
a45cdc79 2934 ++mark;
a0d0e21e 2935 Copy(mark,AvARRAY(av),items,SV*);
93965878 2936 AvFILLp(av) = items - 1;
d8b46c1b 2937 assert(!AvREAL(av));
b1464ded
DM		 2938 if (reified) {
2939 /* transfer 'ownership' of refcnts to new @_ */
2940 AvREAL_on(av);
2941 AvREIFY_off(av);
2942 }
a0d0e21e
LW		 2943 while (items--) {
2944 if (*mark)
2945 SvTEMP_off(*mark);
2946 mark++;
2947 }
2948 }
491527d0 2949 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
005a8a35 2950 Perl_get_db_sub(aTHX_ NULL, cv);
b37c2d43 2951 if (PERLDB_GOTO) {
b96d8cd9 2952 CV * const gotocv = get_cvs("DB::goto", 0);
b37c2d43
AL		 2953 if (gotocv) {
2954 PUSHMARK( PL_stack_sp );
ad64d0ec 2955 call_sv(MUTABLE_SV(gotocv), G_SCALAR | G_NODEBUG);
b37c2d43
AL		 2956 PL_stack_sp--;
2957 }
491527d0 2958 }
1ce6579f 2959 }
a0d0e21e
LW		 2960 RETURNOP(CvSTART(cv));
2961 }
2962 }
1614b0e3 2963 else {
5db1eb8d
BF		 2964 label = SvPV_const(sv, label_len);
2965 label_flags = SvUTF8(sv);
1614b0e3 2966 }
a0d0e21e 2967 }
2fc690dc 2968 else if (!(PL_op->op_flags & OPf_SPECIAL)) {
5db1eb8d
BF		 2969 label = cPVOP->op_pv;
2970 label_flags = (cPVOP->op_private & OPpPV_IS_UTF8) ? SVf_UTF8 : 0;
2971 label_len = strlen(label);
2972 }
2fc690dc 2973 if (!(do_dump || label_len)) DIE(aTHX_ must_have_label);
a0d0e21e 2974
f410a211
NC		 2975 PERL_ASYNC_CHECK();
2976
3532f34a 2977 if (label_len) {
cbbf8932 2978 OP *gotoprobe = NULL;
3b2447bc 2979 bool leaving_eval = FALSE;
33d34e4c 2980 bool in_block = FALSE;
cbbf8932 2981 PERL_CONTEXT *last_eval_cx = NULL;
a0d0e21e
LW		 2982
2983 /* find label */
2984
d4c19fe8 2985 PL_lastgotoprobe = NULL;
a0d0e21e
LW		 2986 *enterops = 0;
2987 for (ix = cxstack_ix; ix >= 0; ix--) {
2988 cx = &cxstack[ix];
6b35e009 2989 switch (CxTYPE(cx)) {
a0d0e21e 2990 case CXt_EVAL:
3b2447bc 2991 leaving_eval = TRUE;
971ecbe6 2992 if (!CxTRYBLOCK(cx)) {
a4f3a277
RH		 2993 gotoprobe = (last_eval_cx ?
2994 last_eval_cx->blk_eval.old_eval_root :
2995 PL_eval_root);
2996 last_eval_cx = cx;
9c5794fe
RH		 2997 break;
2998 }
2999 /* else fall through */
c6fdafd0 3000 case CXt_LOOP_LAZYIV:
d01136d6 3001 case CXt_LOOP_LAZYSV:
3b719c58
NC		 3002 case CXt_LOOP_FOR:
3003 case CXt_LOOP_PLAIN:
bb5aedc1
VP		 3004 case CXt_GIVEN:
3005 case CXt_WHEN:
a0d0e21e
LW		 3006 gotoprobe = cx->blk_oldcop->op_sibling;
3007 break;
3008 case CXt_SUBST:
3009 continue;
3010 case CXt_BLOCK:
33d34e4c 3011 if (ix) {
a0d0e21e 3012 gotoprobe = cx->blk_oldcop->op_sibling;
33d34e4c
AE		 3013 in_block = TRUE;
3014 } else
3280af22 3015 gotoprobe = PL_main_root;
a0d0e21e 3016 break;
b3933176 3017 case CXt_SUB:
9850bf21 3018 if (CvDEPTH(cx->blk_sub.cv) && !CxMULTICALL(cx)) {
b3933176
CS		 3019 gotoprobe = CvROOT(cx->blk_sub.cv);
3020 break;
3021 }
3022 /* FALL THROUGH */
7766f137 3023 case CXt_FORMAT:
0a753a76 3024 case CXt_NULL:
a651a37d 3025 DIE(aTHX_ "Can't \"goto\" out of a pseudo block");
a0d0e21e
LW		 3026 default:
3027 if (ix)
5637ef5b
NC		 3028 DIE(aTHX_ "panic: goto, type=%u, ix=%ld",
3029 CxTYPE(cx), (long) ix);
3280af22 3030 gotoprobe = PL_main_root;
a0d0e21e
LW		 3031 break;
3032 }
2b597662 3033 if (gotoprobe) {
5db1eb8d 3034 retop = dofindlabel(gotoprobe, label, label_len, label_flags,
2b597662
GS		 3035 enterops, enterops + GOTO_DEPTH);
3036 if (retop)
3037 break;
eae48c89
Z		 3038 if (gotoprobe->op_sibling &&
3039 gotoprobe->op_sibling->op_type == OP_UNSTACK &&
3040 gotoprobe->op_sibling->op_sibling) {
3041 retop = dofindlabel(gotoprobe->op_sibling->op_sibling,
5db1eb8d
BF		 3042 label, label_len, label_flags, enterops,
3043 enterops + GOTO_DEPTH);
eae48c89
Z		 3044 if (retop)
3045 break;
3046 }
2b597662 3047 }
3280af22 3048 PL_lastgotoprobe = gotoprobe;
a0d0e21e
LW		 3049 }
3050 if (!retop)
5db1eb8d
BF		 3051 DIE(aTHX_ "Can't find label %"SVf,
3052 SVfARG(newSVpvn_flags(label, label_len,
3053 SVs_TEMP | label_flags)));
a0d0e21e 3054
3b2447bc
RH		 3055 /* if we're leaving an eval, check before we pop any frames
3056 that we're not going to punt, otherwise the error
3057 won't be caught */
3058
3059 if (leaving_eval && *enterops && enterops[1]) {
3060 I32 i;
3061 for (i = 1; enterops[i]; i++)
3062 if (enterops[i]->op_type == OP_ENTERITER)
3063 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
3064 }
3065
b500e03b
GG		 3066 if (*enterops && enterops[1]) {
3067 I32 i = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3068 if (enterops[i])
3069 deprecate("\"goto\" to jump into a construct");
3070 }
3071
a0d0e21e
LW		 3072 /* pop unwanted frames */
3073
3074 if (ix < cxstack_ix) {
3075 I32 oldsave;
3076
3077 if (ix < 0)
3078 ix = 0;
3079 dounwind(ix);
3080 TOPBLOCK(cx);
3280af22 3081 oldsave = PL_scopestack[PL_scopestack_ix];
a0d0e21e
LW		 3082 LEAVE_SCOPE(oldsave);
3083 }
3084
3085 /* push wanted frames */
3086
748a9306 3087 if (*enterops && enterops[1]) {
0bd48802 3088 OP * const oldop = PL_op;
33d34e4c
AE		 3089 ix = enterops[1]->op_type == OP_ENTER && in_block ? 2 : 1;
3090 for (; enterops[ix]; ix++) {
533c011a 3091 PL_op = enterops[ix];
84902520
TB		 3092 /* Eventually we may want to stack the needed arguments
3093 * for each op. For now, we punt on the hard ones. */
533c011a 3094 if (PL_op->op_type == OP_ENTERITER)
894356b3 3095 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop");
16c91539 3096 PL_op->op_ppaddr(aTHX);
a0d0e21e 3097 }
533c011a 3098 PL_op = oldop;
a0d0e21e
LW		 3099 }
3100 }
3101
3102 if (do_dump) {
a5f75d66 3103#ifdef VMS
6b88bc9c 3104 if (!retop) retop = PL_main_start;
a5f75d66 3105#endif
3280af22
NIS		 3106 PL_restartop = retop;
3107 PL_do_undump = TRUE;
a0d0e21e
LW		 3108
3109 my_unexec();
3110
3280af22
NIS		 3111 PL_restartop = 0; /* hmm, must be GNU unexec().. */
3112 PL_do_undump = FALSE;
a0d0e21e
LW		 3113 }
3114
3115 RETURNOP(retop);
3116}
3117
3118PP(pp_exit)
3119{
97aff369 3120 dVAR;
39644a26 3121 dSP;
a0d0e21e
LW		 3122 I32 anum;
3123
3124 if (MAXARG < 1)
3125 anum = 0;
9d3c658e
FC		 3126 else if (!TOPs) {
3127 anum = 0; (void)POPs;
3128 }
ff0cee69 3129 else {
a0d0e21e 3130 anum = SvIVx(POPs);
d98f61e7
GS		 3131#ifdef VMS
3132 if (anum == 1 && (PL_op->op_private & OPpEXIT_VMSISH))
ff0cee69 3133 anum = 0;
96e176bf 3134 VMSISH_HUSHED = VMSISH_HUSHED || (PL_op->op_private & OPpHUSH_VMSISH);
ff0cee69 3135#endif
3136 }
cc3604b1 3137 PL_exit_flags |= PERL_EXIT_EXPECTED;
81d86705
NC		 3138#ifdef PERL_MAD
3139 /* KLUDGE: disable exit 0 in BEGIN blocks when we're just compiling */
3140 if (anum || !(PL_minus_c && PL_madskills))
3141 my_exit(anum);
3142#else
a0d0e21e 3143 my_exit(anum);
81d86705 3144#endif
3280af22 3145 PUSHs(&PL_sv_undef);
a0d0e21e
LW		 3146 RETURN;
3147}
3148
a0d0e21e
LW		 3149/* Eval. */
3150
0824fdcb 3151STATIC void
cea2e8a9 3152S_save_lines(pTHX_ AV *array, SV *sv)
a0d0e21e 3153{
504618e9 3154 const char *s = SvPVX_const(sv);
890ce7af 3155 const char * const send = SvPVX_const(sv) + SvCUR(sv);
504618e9 3156 I32 line = 1;
a0d0e21e 3157
7918f24d
NC		 3158 PERL_ARGS_ASSERT_SAVE_LINES;
3159
a0d0e21e 3160 while (s && s < send) {
f54cb97a 3161 const char *t;
b9f83d2f 3162 SV * const tmpstr = newSV_type(SVt_PVMG);
a0d0e21e 3163
1d963ff3 3164 t = (const char *)memchr(s, '\n', send - s);
a0d0e21e
LW		 3165 if (t)
3166 t++;
3167 else
3168 t = send;
3169
3170 sv_setpvn(tmpstr, s, t - s);
3171 av_store(array, line++, tmpstr);
3172 s = t;
3173 }
3174}
3175
22f16304
RU		 3176/*
3177=for apidoc docatch
3178
3179Check for the cases 0 or 3 of cur_env.je_ret, only used inside an eval context.
3180
31810 is used as continue inside eval,
3182
31833 is used for a die caught by an inner eval - continue inner loop
3184
3185See cop.h: je_mustcatch, when set at any runlevel to TRUE, means eval ops must
3186establish a local jmpenv to handle exception traps.
3187
3188=cut
3189*/
0824fdcb 3190STATIC OP *
cea2e8a9 3191S_docatch(pTHX_ OP *o)
1e422769 3192{
97aff369 3193 dVAR;
6224f72b 3194 int ret;
06b5626a 3195 OP * const oldop = PL_op;
db36c5a1 3196 dJMPENV;
1e422769 3197
1e422769 3198#ifdef DEBUGGING
54310121 3199 assert(CATCH_GET == TRUE);
1e422769 3200#endif
312caa8e 3201 PL_op = o;
8bffa5f8 3202
14dd3ad8 3203 JMPENV_PUSH(ret);
6224f72b 3204 switch (ret) {
312caa8e 3205 case 0:
abd70938
DM		 3206 assert(cxstack_ix >= 0);
3207 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3208 cxstack[cxstack_ix].blk_eval.cur_top_env = PL_top_env;
14dd3ad8 3209 redo_body:
85aaa934 3210 CALLRUNOPS(aTHX);
312caa8e
CS		 3211 break;
3212 case 3:
8bffa5f8 3213 /* die caught by an inner eval - continue inner loop */
febb3a6d
Z		 3214 if (PL_restartop && PL_restartjmpenv == PL_top_env) {
3215 PL_restartjmpenv = NULL;
312caa8e
CS		 3216 PL_op = PL_restartop;
3217 PL_restartop = 0;
3218 goto redo_body;
3219 }
3220 /* FALL THROUGH */
3221 default:
14dd3ad8 3222 JMPENV_POP;
533c011a 3223 PL_op = oldop;
6224f72b 3224 JMPENV_JUMP(ret);
118e2215 3225 assert(0); /* NOTREACHED */
1e422769 3226 }
14dd3ad8 3227 JMPENV_POP;
533c011a 3228 PL_op = oldop;
5f66b61c 3229 return NULL;
1e422769 3230}
3231
a3985cdc
DM		 3232
3233/*
3234=for apidoc find_runcv
3235
3236Locate the CV corresponding to the currently executing sub or eval.
d819b83a
DM		 3237If db_seqp is non_null, skip CVs that are in the DB package and populate
3238*db_seqp with the cop sequence number at the point that the DB:: code was
3239entered. (allows debuggers to eval in the scope of the breakpoint rather
cf525c36 3240than in the scope of the debugger itself).
a3985cdc
DM		 3241
3242=cut
3243*/
3244
3245CV*
d819b83a 3246Perl_find_runcv(pTHX_ U32 *db_seqp)
a3985cdc 3247{
97aff369 3248 dVAR;
a3985cdc 3249 PERL_SI *si;
a3985cdc 3250
d819b83a
DM		 3251 if (db_seqp)
3252 *db_seqp = PL_curcop->cop_seq;
a3985cdc 3253 for (si = PL_curstackinfo; si; si = si->si_prev) {
06b5626a 3254 I32 ix;
a3985cdc 3255 for (ix = si->si_cxix; ix >= 0; ix--) {
06b5626a 3256 const PERL_CONTEXT *cx = &(si->si_cxstack[ix]);
d819b83a 3257 if (CxTYPE(cx) == CXt_SUB || CxTYPE(cx) == CXt_FORMAT) {
1b6737cc 3258 CV * const cv = cx->blk_sub.cv;
d819b83a
DM		 3259 /* skip DB:: code */
3260 if (db_seqp && PL_debstash && CvSTASH(cv) == PL_debstash) {
3261 *db_seqp = cx->blk_oldcop->cop_seq;
3262 continue;
3263 }
3264 return cv;
3265 }
a3985cdc 3266 else if (CxTYPE(cx) == CXt_EVAL && !CxTRYBLOCK(cx))
676a678a 3267 return cx->blk_eval.cv;
a3985cdc
DM		 3268 }
3269 }
3270 return PL_main_cv;
3271}
3272
3273
27e90453
DM		 3274/* Run yyparse() in a setjmp wrapper. Returns:
3275 * 0: yyparse() successful
3276 * 1: yyparse() failed
3277 * 3: yyparse() died
3278 */
3279STATIC int
28ac2b49 3280S_try_yyparse(pTHX_ int gramtype)
27e90453
DM		 3281{
3282 int ret;
3283 dJMPENV;
3284
3285 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
3286 JMPENV_PUSH(ret);
3287 switch (ret) {
3288 case 0:
28ac2b49 3289 ret = yyparse(gramtype) ? 1 : 0;
27e90453
DM		 3290 break;
3291 case 3:
3292 break;
3293 default:
3294 JMPENV_POP;
3295 JMPENV_JUMP(ret);
118e2215 3296 assert(0); /* NOTREACHED */
27e90453
DM		 3297 }
3298 JMPENV_POP;
3299 return ret;
3300}
3301
3302
104a8185
DM		 3303/* Compile a require/do or an eval ''.
3304 *
a3985cdc 3305 * outside is the lexically enclosing CV (if any) that invoked us.
104a8185
DM		 3306 * seq is the current COP scope value.
3307 * hh is the saved hints hash, if any.
3308 *
410be5db 3309 * Returns a bool indicating whether the compile was successful; if so,
104a8185
DM		 3310 * PL_eval_start contains the first op of the compiled code; otherwise,
3311 * pushes undef.
3312 *
3313 * This function is called from two places: pp_require and pp_entereval.
3314 * These can be distinguished by whether PL_op is entereval.
7d116edc
FC		 3315 */
3316
410be5db 3317STATIC bool
104a8185 3318S_doeval(pTHX_ int gimme, CV* outside, U32 seq, HV *hh)
a0d0e21e 3319{
27da23d5 3320 dVAR; dSP;
46c461b5 3321 OP * const saveop = PL_op;
104a8185 3322 bool clear_hints = saveop->op_type != OP_ENTEREVAL;
f45b078d 3323 COP * const oldcurcop = PL_curcop;
26c9400e 3324 bool in_require = (saveop->op_type == OP_REQUIRE);
27e90453 3325 int yystatus;
676a678a 3326 CV *evalcv;
a0d0e21e 3327
27e90453 3328 PL_in_eval = (in_require
6dc8a9e4
IZ		 3329 ? (EVAL_INREQUIRE | (PL_in_eval & EVAL_INEVAL))
3330 : EVAL_INEVAL);
a0d0e21e 3331
1ce6579f 3332 PUSHMARK(SP);
3333
676a678a
Z		 3334 evalcv = MUTABLE_CV(newSV_type(SVt_PVCV));
3335 CvEVAL_on(evalcv);
2090ab20 3336 assert(CxTYPE(&cxstack[cxstack_ix]) == CXt_EVAL);
676a678a 3337 cxstack[cxstack_ix].blk_eval.cv = evalcv;
86a64801 3338 cxstack[cxstack_ix].blk_gimme = gimme;
2090ab20 3339
676a678a
Z		 3340 CvOUTSIDE_SEQ(evalcv) = seq;
3341 CvOUTSIDE(evalcv) = MUTABLE_CV(SvREFCNT_inc_simple(outside));
a3985cdc 3342
dd2155a4 3343 /* set up a scratch pad */
a0d0e21e 3344
676a678a 3345 CvPADLIST(evalcv) = pad_new(padnew_SAVE);
cecbe010 3346 PL_op = NULL; /* avoid PL_op and PL_curpad referring to different CVs */
2c05e328 3347
07055b4c 3348
81d86705 3349 if (!PL_madskills)
676a678a 3350 SAVEMORTALIZESV(evalcv); /* must remain until end of current statement */
748a9306 3351
a0d0e21e
LW		 3352 /* make sure we compile in the right package */
3353
ed094faf 3354 if (CopSTASH_ne(PL_curcop, PL_curstash)) {
03d9f026
FC		 3355 SAVEGENERICSV(PL_curstash);
3356 PL_curstash = (HV *)SvREFCNT_inc_simple(CopSTASH(PL_curcop));
a0d0e21e 3357 }
3c10abe3 3358 /* XXX:ajgo do we really need to alloc an AV for begin/checkunit */
3280af22
NIS		 3359 SAVESPTR(PL_beginav);
3360 PL_beginav = newAV();
3361 SAVEFREESV(PL_beginav);
3c10abe3
AG		 3362 SAVESPTR(PL_unitcheckav);
3363 PL_unitcheckav = newAV();
3364 SAVEFREESV(PL_unitcheckav);
a0d0e21e 3365
81d86705 3366#ifdef PERL_MAD
9da243ce 3367 SAVEBOOL(PL_madskills);
81d86705
NC		 3368 PL_madskills = 0;
3369#endif
3370
104a8185 3371 ENTER_with_name("evalcomp");
676a678a
Z		 3372 SAVESPTR(PL_compcv);
3373 PL_compcv = evalcv;
3374
a0d0e21e
LW		 3375 /* try to compile it */
3376
5f66b61c 3377 PL_eval_root = NULL;
3280af22 3378 PL_curcop = &PL_compiling;
26c9400e 3379 if ((saveop->op_type != OP_REQUIRE) && (saveop->op_flags & OPf_SPECIAL))
faef0170 3380 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS		 3381 else
3382 CLEAR_ERRSV();
27e90453 3383
377b5421
DM		 3384 SAVEHINTS();
3385 if (clear_hints) {
3386 PL_hints = 0;
3387 hv_clear(GvHV(PL_hintgv));
3388 }
3389 else {
3390 PL_hints = saveop->op_private & OPpEVAL_COPHH
3391 ? oldcurcop->cop_hints : saveop->op_targ;
3392 if (hh) {
3393 /* SAVEHINTS created a new HV in PL_hintgv, which we need to GC */
3394 SvREFCNT_dec(GvHV(PL_hintgv));
3395 GvHV(PL_hintgv) = hh;
3396 }
3397 }
3398 SAVECOMPILEWARNINGS();
3399 if (clear_hints) {
3400 if (PL_dowarn & G_WARN_ALL_ON)
3401 PL_compiling.cop_warnings = pWARN_ALL ;
3402 else if (PL_dowarn & G_WARN_ALL_OFF)
3403 PL_compiling.cop_warnings = pWARN_NONE ;
3404 else
3405 PL_compiling.cop_warnings = pWARN_STD ;
3406 }
3407 else {
3408 PL_compiling.cop_warnings =
3409 DUP_WARNINGS(oldcurcop->cop_warnings);
3410 cophh_free(CopHINTHASH_get(&PL_compiling));
3411 if (Perl_cop_fetch_label(aTHX_ oldcurcop, NULL, NULL)) {
3412 /* The label, if present, is the first entry on the chain. So rather
3413 than writing a blank label in front of it (which involves an
3414 allocation), just use the next entry in the chain. */
3415 PL_compiling.cop_hints_hash
3416 = cophh_copy(oldcurcop->cop_hints_hash->refcounted_he_next);
3417 /* Check the assumption that this removed the label. */
3418 assert(Perl_cop_fetch_label(aTHX_ &PL_compiling, NULL, NULL) == NULL);
f45b078d 3419 }
377b5421
DM		 3420 else
3421 PL_compiling.cop_hints_hash = cophh_copy(oldcurcop->cop_hints_hash);
3422 }
f45b078d 3423
a88d97bf 3424 CALL_BLOCK_HOOKS(bhk_eval, saveop);
52db365a 3425
27e90453
DM		 3426 /* note that yyparse() may raise an exception, e.g. C<BEGIN{die}>,
3427 * so honour CATCH_GET and trap it here if necessary */
3428
28ac2b49 3429 yystatus = (!in_require && CATCH_GET) ? S_try_yyparse(aTHX_ GRAMPROG) : yyparse(GRAMPROG);
27e90453
DM		 3430
3431 if (yystatus || PL_parser->error_count || !PL_eval_root) {
0c58d367 3432 SV **newsp; /* Used by POPBLOCK. */
d164302a 3433 PERL_CONTEXT *cx;
27e90453 3434 I32 optype; /* Used by POPEVAL. */
d164302a 3435 SV *namesv;
bfed75c6 3436
d164302a
GG		 3437 cx = NULL;
3438 namesv = NULL;
27e90453
DM		 3439 PERL_UNUSED_VAR(newsp);
3440 PERL_UNUSED_VAR(optype);
3441
c86ffc32
DM		 3442 /* note that if yystatus == 3, then the EVAL CX block has already
3443 * been popped, and various vars restored */
533c011a 3444 PL_op = saveop;
27e90453 3445 if (yystatus != 3) {
c86ffc32
DM		 3446 if (PL_eval_root) {
3447 op_free(PL_eval_root);
3448 PL_eval_root = NULL;
3449 }
27e90453 3450 SP = PL_stack_base + POPMARK; /* pop original mark */
377b5421
DM		 3451 POPBLOCK(cx,PL_curpm);
3452 POPEVAL(cx);
3453 namesv = cx->blk_eval.old_namesv;
bbde7ba3 3454 /* POPBLOCK renders LEAVE_with_name("evalcomp") unnecessary. */
27e90453 3455 LEAVE_with_name("eval"); /* pp_entereval knows about this LEAVE. */
cd6472fc 3456 }
9d4ba2ae 3457
27e90453 3458 if (in_require) {
b6494f15
VP		 3459 if (!cx) {
3460 /* If cx is still NULL, it means that we didn't go in the
3461 * POPEVAL branch. */
3462 cx = &cxstack[cxstack_ix];
3463 assert(CxTYPE(cx) == CXt_EVAL);
3464 namesv = cx->blk_eval.old_namesv;
3465 }
3466 (void)hv_store(GvHVn(PL_incgv),
ecad31f0 3467 SvPVX_const(namesv),
c60dbbc3 3468 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15 3469 &PL_sv_undef, 0);
ecad31f0
BF		 3470 Perl_croak(aTHX_ "%"SVf"Compilation failed in require",
3471 SVfARG(ERRSV
3472 ? ERRSV
3473 : newSVpvs_flags("Unknown error\n", SVs_TEMP)));
5a844595 3474 }
9d7f88dd 3475 else {
ecad31f0 3476 if (!*(SvPVx_nolen_const(ERRSV))) {
6502358f 3477 sv_setpvs(ERRSV, "Compilation error");
9d7f88dd
SR		 3478 }
3479 }
2bf54cc6 3480 if (gimme != G_ARRAY) PUSHs(&PL_sv_undef);
410be5db
DM		 3481 PUTBACK;
3482 return FALSE;
a0d0e21e 3483 }
104a8185
DM		 3484 else
3485 LEAVE_with_name("evalcomp");
3486
57843af0 3487 CopLINE_set(&PL_compiling, 0);
104a8185 3488 SAVEFREEOP(PL_eval_root);
0c58d367 3489
a0d0e21e
LW		 3490 DEBUG_x(dump_eval());
3491
55497cff 3492 /* Register with debugger: */
26c9400e 3493 if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) {
b96d8cd9 3494 CV * const cv = get_cvs("DB::postponed", 0);
55497cff 3495 if (cv) {
3496 dSP;
924508f0 3497 PUSHMARK(SP);
ad64d0ec 3498 XPUSHs(MUTABLE_SV(CopFILEGV(&PL_compiling)));
55497cff 3499 PUTBACK;
ad64d0ec 3500 call_sv(MUTABLE_SV(cv), G_DISCARD);
55497cff 3501 }
3502 }
3503
8ed49485
FC		 3504 if (PL_unitcheckav) {
3505 OP *es = PL_eval_start;
3c10abe3 3506 call_list(PL_scopestack_ix, PL_unitcheckav);
8ed49485
FC		 3507 PL_eval_start = es;
3508 }
3c10abe3 3509
a0d0e21e
LW		 3510 /* compiled okay, so do it */
3511
676a678a 3512 CvDEPTH(evalcv) = 1;
3280af22 3513 SP = PL_stack_base + POPMARK; /* pop original mark */
533c011a 3514 PL_op = saveop; /* The caller may need it. */
bc177e6b 3515 PL_parser->lex_state = LEX_NOTPARSING; /* $^S needs this. */
5dc0d613 3516
410be5db
DM		 3517 PUTBACK;
3518 return TRUE;
a0d0e21e
LW		 3519}
3520
a6c40364 3521STATIC PerlIO *
282b29ee 3522S_check_type_and_open(pTHX_ SV *name)
ce8abf5f
SP		 3523{
3524 Stat_t st;
282b29ee
NC		 3525 const char *p = SvPV_nolen_const(name);
3526 const int st_rc = PerlLIO_stat(p, &st);
df528165 3527
7918f24d
NC		 3528 PERL_ARGS_ASSERT_CHECK_TYPE_AND_OPEN;
3529
6b845e56 3530 if (st_rc < 0 || S_ISDIR(st.st_mode) || S_ISBLK(st.st_mode)) {
4608196e 3531 return NULL;
ce8abf5f
SP		 3532 }
3533
ccb84406 3534#if !defined(PERLIO_IS_STDIO) && !defined(USE_SFIO)
639dfab0 3535 return PerlIO_openn(aTHX_ ":", PERL_SCRIPT_MODE, -1, 0, 0, NULL, 1, &name);
ccb84406 3536#else
282b29ee 3537 return PerlIO_open(p, PERL_SCRIPT_MODE);
ccb84406 3538#endif
ce8abf5f
SP		 3539}
3540
75c20bac 3541#ifndef PERL_DISABLE_PMC
ce8abf5f 3542STATIC PerlIO *
282b29ee 3543S_doopen_pm(pTHX_ SV *name)
b295d113 3544{
282b29ee
NC		 3545 STRLEN namelen;
3546 const char *p = SvPV_const(name, namelen);
b295d113 3547
7918f24d
NC		 3548 PERL_ARGS_ASSERT_DOOPEN_PM;
3549
282b29ee 3550 if (namelen > 3 && memEQs(p + namelen - 3, 3, ".pm")) {
eb70bb4a 3551 SV *const pmcsv = sv_newmortal();
a6c40364 3552 Stat_t pmcstat;
50b8ed39 3553
eb70bb4a 3554 SvSetSV_nosteal(pmcsv,name);
282b29ee 3555 sv_catpvn(pmcsv, "c", 1);
50b8ed39 3556
282b29ee
NC		 3557 if (PerlLIO_stat(SvPV_nolen_const(pmcsv), &pmcstat) >= 0)
3558 return check_type_and_open(pmcsv);
a6c40364 3559 }
282b29ee 3560 return check_type_and_open(name);
75c20bac 3561}
7925835c 3562#else
282b29ee 3563# define doopen_pm(name) check_type_and_open(name)
7925835c 3564#endif /* !PERL_DISABLE_PMC */
b295d113 3565
a0d0e21e
LW		 3566PP(pp_require)
3567{
27da23d5 3568 dVAR; dSP;
c09156bb 3569 register PERL_CONTEXT *cx;
a0d0e21e 3570 SV *sv;
5c144d81 3571 const char *name;
6132ea6c 3572 STRLEN len;
4492be7a
JM		 3573 char * unixname;
3574 STRLEN unixlen;
62f5ad7a 3575#ifdef VMS
4492be7a 3576 int vms_unixname = 0;
62f5ad7a 3577#endif
c445ea15
AL		 3578 const char *tryname = NULL;
3579 SV *namesv = NULL;
f54cb97a 3580 const I32 gimme = GIMME_V;
bbed91b5 3581 int filter_has_file = 0;
c445ea15 3582 PerlIO *tryrsfp = NULL;
34113e50 3583 SV *filter_cache = NULL;
c445ea15
AL		 3584 SV *filter_state = NULL;
3585 SV *filter_sub = NULL;
3586 SV *hook_sv = NULL;
6ec9efec
JH		 3587 SV *encoding;
3588 OP *op;
83b195e4 3589 int saved_errno;
a0d0e21e
LW		 3590
3591 sv = POPs;
d7aa5382 3592 if ( (SvNIOKp(sv) || SvVOK(sv)) && PL_op->op_type != OP_DOFILE) {
d086148c 3593 sv = sv_2mortal(new_version(sv));
d7aa5382 3594 if (!sv_derived_from(PL_patchlevel, "version"))
ac0e6a2f 3595 upg_version(PL_patchlevel, TRUE);
149c1637 3596 if (cUNOP->op_first->op_type == OP_CONST && cUNOP->op_first->op_private & OPpCONST_NOVER) {
3cacfbb9 3597 if ( vcmp(sv,PL_patchlevel) <= 0 )
468aa647 3598 DIE(aTHX_ "Perls since %"SVf" too modern--this is %"SVf", stopped",
e753e3b1
FC		 3599 SVfARG(sv_2mortal(vnormal(sv))),
3600 SVfARG(sv_2mortal(vnormal(PL_patchlevel)))
3601 );
468aa647
RGS		 3602 }
3603 else {
d1029faa
JP		 3604 if ( vcmp(sv,PL_patchlevel) > 0 ) {
3605 I32 first = 0;
3606 AV *lav;
3607 SV * const req = SvRV(sv);
85fbaab2 3608 SV * const pv = *hv_fetchs(MUTABLE_HV(req), "original", FALSE);
d1029faa
JP		 3609
3610 /* get the left hand term */
502c6561 3611 lav = MUTABLE_AV(SvRV(*hv_fetchs(MUTABLE_HV(req), "version", FALSE)));
d1029faa
JP		 3612
3613 first = SvIV(*av_fetch(lav,0,0));
3614 if ( first > (int)PERL_REVISION /* probably 'use 6.0' */
85fbaab2 3615 || hv_exists(MUTABLE_HV(req), "qv", 2 ) /* qv style */
d1029faa
JP		 3616 || av_len(lav) > 1 /* FP with > 3 digits */
3617 || strstr(SvPVX(pv),".0") /* FP with leading 0 */
3618 ) {
3619 DIE(aTHX_ "Perl %"SVf" required--this is only "
9d056fb0
FC		 3620 "%"SVf", stopped",
3621 SVfARG(sv_2mortal(vnormal(req))),
3622 SVfARG(sv_2mortal(vnormal(PL_patchlevel)))
3623 );
d1029faa
JP		 3624 }
3625 else { /* probably 'use 5.10' or 'use 5.8' */
af61dbfd 3626 SV *hintsv;
d1029faa
JP		 3627 I32 second = 0;
3628
3629 if (av_len(lav)>=1)
3630 second = SvIV(*av_fetch(lav,1,0));
3631
3632 second /= second >= 600 ? 100 : 10;
af61dbfd
NC		 3633 hintsv = Perl_newSVpvf(aTHX_ "v%d.%d.0",
3634 (int)first, (int)second);
d1029faa
JP		 3635 upg_version(hintsv, TRUE);
3636
3637 DIE(aTHX_ "Perl %"SVf" required (did you mean %"SVf"?)"
3638 "--this is only %"SVf", stopped",
1be7d6f3
FC		 3639 SVfARG(sv_2mortal(vnormal(req))),
3640 SVfARG(sv_2mortal(vnormal(sv_2mortal(hintsv)))),
3641 SVfARG(sv_2mortal(vnormal(PL_patchlevel)))
3642 );
d1029faa
JP		 3643 }
3644 }
468aa647 3645 }
d7aa5382 3646
7dfde25d 3647 RETPUSHYES;
a0d0e21e 3648 }
5c144d81 3649 name = SvPV_const(sv, len);
6132ea6c 3650 if (!(name && len > 0 && *name))
cea2e8a9 3651 DIE(aTHX_ "Null filename used");
4633a7c4 3652 TAINT_PROPER("require");
4492be7a
JM		 3653
3654
3655#ifdef VMS
3656 /* The key in the %ENV hash is in the syntax of file passed as the argument
3657 * usually this is in UNIX format, but sometimes in VMS format, which
3658 * can result in a module being pulled in more than once.
3659 * To prevent this, the key must be stored in UNIX format if the VMS
3660 * name can be translated to UNIX.
3661 */
3662 if ((unixname = tounixspec(name, NULL)) != NULL) {
3663 unixlen = strlen(unixname);
3664 vms_unixname = 1;
3665 }
3666 else
3667#endif
3668 {
3669 /* if not VMS or VMS name can not be translated to UNIX, pass it
3670 * through.
3671 */
3672 unixname = (char *) name;
3673 unixlen = len;
3674 }
44f8325f 3675 if (PL_op->op_type == OP_REQUIRE) {
4492be7a
JM		 3676 SV * const * const svp = hv_fetch(GvHVn(PL_incgv),
3677 unixname, unixlen, 0);
44f8325f
AL		 3678 if ( svp ) {
3679 if (*svp != &PL_sv_undef)
3680 RETPUSHYES;
3681 else
087b5369
RD		 3682 DIE(aTHX_ "Attempt to reload %s aborted.\n"
3683 "Compilation failed in require", unixname);
44f8325f 3684 }
4d8b06f1 3685 }
a0d0e21e
LW		 3686
3687 /* prepare to compile file */
3688
be4b629d 3689 if (path_is_absolute(name)) {
282b29ee 3690 /* At this point, name is SvPVX(sv) */
46fc3d4c 3691 tryname = name;
282b29ee 3692 tryrsfp = doopen_pm(sv);
bf4acbe4 3693 }
2433d39e 3694 if (!tryrsfp && !(errno == EACCES && path_is_absolute(name))) {
44f8325f 3695 AV * const ar = GvAVn(PL_incgv);
a0d0e21e 3696 I32 i;
748a9306 3697#ifdef VMS
4492be7a 3698 if (vms_unixname)
46fc3d4c 3699#endif
3700 {
d0328fd7 3701 namesv = newSV_type(SVt_PV);
46fc3d4c 3702 for (i = 0; i <= AvFILL(ar); i++) {
df528165 3703 SV * const dirsv = *av_fetch(ar, i, TRUE);
bbed91b5 3704
ad64d0ec 3705 if (SvTIED_mg((const SV *)ar, PERL_MAGIC_tied))
c38a6530 3706 mg_get(dirsv);
bbed91b5
KF		 3707 if (SvROK(dirsv)) {
3708 int count;
a3b58a99 3709 SV **svp;
bbed91b5
KF		 3710 SV *loader = dirsv;
3711
e14e2dc8
NC		 3712 if (SvTYPE(SvRV(loader)) == SVt_PVAV
3713 && !sv_isobject(loader))
3714 {
502c6561 3715 loader = *av_fetch(MUTABLE_AV(SvRV(loader)), 0, TRUE);
bbed91b5
KF		 3716 }
3717
b900a521 3718 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
44f0be63 3719 PTR2UV(SvRV(dirsv)), name);
349d4f2f 3720 tryname = SvPVX_const(namesv);
c445ea15 3721 tryrsfp = NULL;
bbed91b5 3722
d343c3ef 3723 ENTER_with_name("call_INC");
bbed91b5
KF		 3724 SAVETMPS;
3725 EXTEND(SP, 2);
3726
3727 PUSHMARK(SP);
3728 PUSHs(dirsv);
3729 PUSHs(sv);
3730 PUTBACK;
e982885c
NC		 3731 if (sv_isobject(loader))
3732 count = call_method("INC", G_ARRAY);
3733 else
3734 count = call_sv(loader, G_ARRAY);
bbed91b5
KF		 3735 SPAGAIN;
3736
3737 if (count > 0) {
3738 int i = 0;
3739 SV *arg;
3740
3741 SP -= count - 1;
3742 arg = SP[i++];
3743
34113e50
NC		 3744 if (SvROK(arg) && (SvTYPE(SvRV(arg)) <= SVt_PVLV)
3745 && !isGV_with_GP(SvRV(arg))) {
3746 filter_cache = SvRV(arg);
74c765eb 3747 SvREFCNT_inc_simple_void_NN(filter_cache);
34113e50
NC		 3748
3749 if (i < count) {
3750 arg = SP[i++];
3751 }
3752 }
3753
6e592b3a 3754 if (SvROK(arg) && isGV_with_GP(SvRV(arg))) {
bbed91b5
KF		 3755 arg = SvRV(arg);
3756 }
3757
6e592b3a 3758 if (isGV_with_GP(arg)) {
159b6efe 3759 IO * const io = GvIO((const GV *)arg);
bbed91b5
KF		 3760
3761 ++filter_has_file;
3762
3763 if (io) {
3764 tryrsfp = IoIFP(io);
0f7de14d
NC		 3765 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
3766 PerlIO_close(IoOFP(io));
bbed91b5 3767 }
0f7de14d
NC		 3768 IoIFP(io) = NULL;
3769 IoOFP(io) = NULL;
bbed91b5
KF		 3770 }
3771
3772 if (i < count) {
3773 arg = SP[i++];
3774 }
3775 }
3776
3777 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
3778 filter_sub = arg;
74c765eb 3779 SvREFCNT_inc_simple_void_NN(filter_sub);
bbed91b5
KF		 3780
3781 if (i < count) {
3782 filter_state = SP[i];
b37c2d43 3783 SvREFCNT_inc_simple_void(filter_state);
bbed91b5 3784 }
34113e50 3785 }
bbed91b5 3786
34113e50
NC		 3787 if (!tryrsfp && (filter_cache || filter_sub)) {
3788 tryrsfp = PerlIO_open(BIT_BUCKET,
3789 PERL_SCRIPT_MODE);
bbed91b5 3790 }
1d06aecd 3791 SP--;
bbed91b5
KF		 3792 }
3793
3794 PUTBACK;
3795 FREETMPS;
d343c3ef 3796 LEAVE_with_name("call_INC");
bbed91b5 3797
c5f55552
NC		 3798 /* Adjust file name if the hook has set an %INC entry.
3799 This needs to happen after the FREETMPS above. */
3800 svp = hv_fetch(GvHVn(PL_incgv), name, len, 0);
3801 if (svp)
3802 tryname = SvPV_nolen_const(*svp);
3803
bbed91b5 3804 if (tryrsfp) {
89ccab8c 3805 hook_sv = dirsv;
bbed91b5
KF		 3806 break;
3807 }
3808
3809 filter_has_file = 0;
34113e50
NC		 3810 if (filter_cache) {
3811 SvREFCNT_dec(filter_cache);
3812 filter_cache = NULL;
3813 }
bbed91b5
KF		 3814 if (filter_state) {
3815 SvREFCNT_dec(filter_state);
c445ea15 3816 filter_state = NULL;
bbed91b5
KF		 3817 }
3818 if (filter_sub) {
3819 SvREFCNT_dec(filter_sub);
c445ea15 3820 filter_sub = NULL;
bbed91b5
KF		 3821 }
3822 }
3823 else {
be4b629d 3824 if (!path_is_absolute(name)
be4b629d 3825 ) {
b640a14a
NC		 3826 const char *dir;
3827 STRLEN dirlen;
3828
3829 if (SvOK(dirsv)) {
3830 dir = SvPV_const(dirsv, dirlen);
3831 } else {
3832 dir = "";
3833 dirlen = 0;
3834 }
3835
e37778c2 3836#ifdef VMS
bbed91b5 3837 char *unixdir;
c445ea15 3838 if ((unixdir = tounixpath(dir, NULL)) == NULL)
bbed91b5
KF		 3839 continue;
3840 sv_setpv(namesv, unixdir);
3841 sv_catpv(namesv, unixname);
e37778c2
NC		 3842#else
3843# ifdef __SYMBIAN32__
27da23d5
JH		 3844 if (PL_origfilename[0] &&
3845 PL_origfilename[1] == ':' &&
3846 !(dir[0] && dir[1] == ':'))
3847 Perl_sv_setpvf(aTHX_ namesv,
3848 "%c:%s\\%s",
3849 PL_origfilename[0],
3850 dir, name);
3851 else
3852 Perl_sv_setpvf(aTHX_ namesv,
3853 "%s\\%s",
3854 dir, name);
e37778c2 3855# else
b640a14a
NC		 3856 /* The equivalent of
3857 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
3858 but without the need to parse the format string, or
3859 call strlen on either pointer, and with the correct
3860 allocation up front. */
3861 {
3862 char *tmp = SvGROW(namesv, dirlen + len + 2);
3863
3864 memcpy(tmp, dir, dirlen);
3865 tmp +=dirlen;
3866 *tmp++ = '/';
3867 /* name came from an SV, so it will have a '\0' at the
3868 end that we can copy as part of this memcpy(). */
3869 memcpy(tmp, name, len + 1);
3870
3871 SvCUR_set(namesv, dirlen + len + 1);
282b29ee 3872 SvPOK_on(namesv);
b640a14a 3873 }
27da23d5 3874# endif
bf4acbe4 3875#endif
bbed91b5 3876 TAINT_PROPER("require");
349d4f2f 3877 tryname = SvPVX_const(namesv);
282b29ee 3878 tryrsfp = doopen_pm(namesv);
bbed91b5 3879 if (tryrsfp) {
e63be746
RGS		 3880 if (tryname[0] == '.' && tryname[1] == '/') {
3881 ++tryname;
3882 while (*++tryname == '/');
3883 }
bbed91b5
KF		 3884 break;
3885 }
2433d39e
BF		 3886 else if (errno == EMFILE || errno == EACCES) {
3887 /* no point in trying other paths if out of handles;
3888 * on the other hand, if we couldn't open one of the
3889 * files, then going on with the search could lead to
3890 * unexpected results; see perl #113422
3891 */
3892 break;
3893 }
be4b629d 3894 }
46fc3d4c 3895 }
a0d0e21e
LW		 3896 }
3897 }
3898 }
83b195e4 3899 saved_errno = errno; /* sv_2mortal can realloc things */
b2ef6d44 3900 sv_2mortal(namesv);
a0d0e21e 3901 if (!tryrsfp) {
533c011a 3902 if (PL_op->op_type == OP_REQUIRE) {
83b195e4 3903 if(saved_errno == EMFILE || saved_errno == EACCES) {
c9d5e35e 3904 /* diag_listed_as: Can't locate %s */
83b195e4 3905 DIE(aTHX_ "Can't locate %s: %s", name, Strerror(saved_errno));
e31de809
SP		 3906 } else {
3907 if (namesv) { /* did we lookup @INC? */
44f8325f 3908 AV * const ar = GvAVn(PL_incgv);
e31de809 3909 I32 i;
c9d5e35e
NC		 3910 SV *const inc = newSVpvs_flags("", SVs_TEMP);
3911 for (i = 0; i <= AvFILL(ar); i++) {
3912 sv_catpvs(inc, " ");
3913 sv_catsv(inc, *av_fetch(ar, i, TRUE));
3914 }
3915
3916 /* diag_listed_as: Can't locate %s */
3917 DIE(aTHX_
3918 "Can't locate %s in @INC%s%s (@INC contains:%" SVf ")",
3919 name,
686c4ca0
NC		 3920 (memEQ(name + len - 2, ".h", 3)
3921 ? " (change .h to .ph maybe?) (did you run h2ph?)" : ""),
3922 (memEQ(name + len - 3, ".ph", 4)
c9d5e35e
NC		 3923 ? " (did you run h2ph?)" : ""),
3924 inc
3925 );
3926 }
2683423c 3927 }
c9d5e35e 3928 DIE(aTHX_ "Can't locate %s", name);
a0d0e21e
LW		 3929 }
3930
3931 RETPUSHUNDEF;
3932 }
d8bfb8bd 3933 else
93189314 3934 SETERRNO(0, SS_NORMAL);
a0d0e21e
LW		 3935
3936 /* Assume success here to prevent recursive requirement. */
238d24b4 3937 /* name is never assigned to again, so len is still strlen(name) */
d3a4e64e 3938 /* Check whether a hook in @INC has already filled %INC */
44f8325f 3939 if (!hook_sv) {
4492be7a 3940 (void)hv_store(GvHVn(PL_incgv),
b2ef6d44 3941 unixname, unixlen, newSVpv(tryname,0),0);
44f8325f 3942 } else {
4492be7a 3943 SV** const svp = hv_fetch(GvHVn(PL_incgv), unixname, unixlen, 0);
44f8325f 3944 if (!svp)
4492be7a
JM		 3945 (void)hv_store(GvHVn(PL_incgv),
3946 unixname, unixlen, SvREFCNT_inc_simple(hook_sv), 0 );
d3a4e64e 3947 }
a0d0e21e 3948
d343c3ef 3949 ENTER_with_name("eval");
a0d0e21e 3950 SAVETMPS;
b2ef6d44
FC		 3951 SAVECOPFILE_FREE(&PL_compiling);
3952 CopFILE_set(&PL_compiling, tryname);
8eaa0acf 3953 lex_start(NULL, tryrsfp, 0);
e50aee73 3954
34113e50 3955 if (filter_sub || filter_cache) {
4464f08e
NC		 3956 /* We can use the SvPV of the filter PVIO itself as our cache, rather
3957 than hanging another SV from it. In turn, filter_add() optionally
3958 takes the SV to use as the filter (or creates a new SV if passed
3959 NULL), so simply pass in whatever value filter_cache has. */
3960 SV * const datasv = filter_add(S_run_user_filter, filter_cache);
bbed91b5 3961 IoLINES(datasv) = filter_has_file;
159b6efe
NC		 3962 IoTOP_GV(datasv) = MUTABLE_GV(filter_state);
3963 IoBOTTOM_GV(datasv) = MUTABLE_GV(filter_sub);
bbed91b5
KF		 3964 }
3965
3966 /* switch to eval mode */
a0d0e21e 3967 PUSHBLOCK(cx, CXt_EVAL, SP);
6b75f042 3968 PUSHEVAL(cx, name);
f39bc417 3969 cx->blk_eval.retop = PL_op->op_next;
a0d0e21e 3970
57843af0
GS		 3971 SAVECOPLINE(&PL_compiling);
3972 CopLINE_set(&PL_compiling, 0);
a0d0e21e
LW		 3973
3974 PUTBACK;
6ec9efec
JH		 3975
3976 /* Store and reset encoding. */
3977 encoding = PL_encoding;
c445ea15 3978 PL_encoding = NULL;
6ec9efec 3979
104a8185 3980 if (doeval(gimme, NULL, PL_curcop->cop_seq, NULL))
410be5db
DM		 3981 op = DOCATCH(PL_eval_start);
3982 else
3983 op = PL_op->op_next;
bfed75c6 3984
6ec9efec
JH		 3985 /* Restore encoding. */
3986 PL_encoding = encoding;
3987
3988 return op;
a0d0e21e
LW		 3989}
3990
996c9baa
VP		 3991/* This is a op added to hold the hints hash for
3992 pp_entereval. The hash can be modified by the code
3993 being eval'ed, so we return a copy instead. */
3994
3995PP(pp_hintseval)
3996{
3997 dVAR;
3998 dSP;
defdfed5 3999 mXPUSHs(MUTABLE_SV(hv_copy_hints_hv(MUTABLE_HV(cSVOP_sv))));
996c9baa
VP		 4000 RETURN;
4001}
4002
4003
a0d0e21e
LW		 4004PP(pp_entereval)
4005{
27da23d5 4006 dVAR; dSP;
c09156bb 4007 register PERL_CONTEXT *cx;
0d863452 4008 SV *sv;
890ce7af 4009 const I32 gimme = GIMME_V;
fd06b02c 4010 const U32 was = PL_breakable_sub_gen;
83ee9e09 4011 char tbuf[TYPE_DIGITS(long) + 12];
78da7625 4012 bool saved_delete = FALSE;
83ee9e09 4013 char *tmpbuf = tbuf;
a0d0e21e 4014 STRLEN len;
a3985cdc 4015 CV* runcv;
0abcdfa4 4016 U32 seq, lex_flags = 0;
c445ea15 4017 HV *saved_hh = NULL;
60d63348 4018 const bool bytes = PL_op->op_private & OPpEVAL_BYTES;
e389bba9 4019
0d863452 4020 if (PL_op->op_private & OPpEVAL_HAS_HH) {
85fbaab2 4021 saved_hh = MUTABLE_HV(SvREFCNT_inc(POPs));
0d863452 4022 }
bc344123
FC		 4023 else if (PL_hints & HINT_LOCALIZE_HH || (
4024 PL_op->op_private & OPpEVAL_COPHH
4025 && PL_curcop->cop_hints & HINT_LOCALIZE_HH
4026 )) {
7d789282
FC		 4027 saved_hh = cop_hints_2hv(PL_curcop, 0);
4028 hv_magic(saved_hh, NULL, PERL_MAGIC_hints);
4029 }
0d863452 4030 sv = POPs;
895b760f
DM		 4031 if (!SvPOK(sv)) {
4032 /* make sure we've got a plain PV (no overload etc) before testing
4033 * for taint. Making a copy here is probably overkill, but better
4034 * safe than sorry */
0479a84a
NC		 4035 STRLEN len;
4036 const char * const p = SvPV_const(sv, len);
4037
4038 sv = newSVpvn_flags(p, len, SVs_TEMP | SvUTF8(sv));
0abcdfa4 4039 lex_flags |= LEX_START_COPIED;
7d789282 4040
60d63348 4041 if (bytes && SvUTF8(sv))
7d789282
FC		 4042 SvPVbyte_force(sv, len);
4043 }
60d63348 4044 else if (bytes && SvUTF8(sv)) {
e1fa07e3 4045 /* Don't modify someone else's scalar */
7d789282
FC		 4046 STRLEN len;
4047 sv = newSVsv(sv);
5cefc8c1 4048 (void)sv_2mortal(sv);
7d789282 4049 SvPVbyte_force(sv,len);
0abcdfa4 4050 lex_flags |= LEX_START_COPIED;
895b760f 4051 }
a0d0e21e 4052
af2d3def 4053 TAINT_IF(SvTAINTED(sv));
748a9306 4054 TAINT_PROPER("eval");
a0d0e21e 4055
d343c3ef 4056 ENTER_with_name("eval");
0abcdfa4 4057 lex_start(sv, NULL, lex_flags | (PL_op->op_private & OPpEVAL_UNICODE
60d63348
FC		 4058 ? LEX_IGNORE_UTF8_HINTS
4059 : bytes ? LEX_EVALBYTES : LEX_START_SAME_FILTER
0abcdfa4 4060 )
60d63348 4061 );
748a9306 4062 SAVETMPS;
ac27b0f5 4063
a0d0e21e
LW		 4064 /* switch to eval mode */
4065
83ee9e09 4066 if (PERLDB_NAMEEVAL && CopLINE(PL_curcop)) {
8b38226b
AL		 4067 SV * const temp_sv = sv_newmortal();
4068 Perl_sv_setpvf(aTHX_ temp_sv, "_<(eval %lu)[%s:%"IVdf"]",
83ee9e09
GS		 4069 (unsigned long)++PL_evalseq,
4070 CopFILE(PL_curcop), (IV)CopLINE(PL_curcop));
8b38226b
AL		 4071 tmpbuf = SvPVX(temp_sv);
4072 len = SvCUR(temp_sv);
83ee9e09
GS		 4073 }
4074 else
d9fad198 4075 len = my_snprintf(tmpbuf, sizeof(tbuf), "_<(eval %lu)", (unsigned long)++PL_evalseq);
f4dd75d9 4076 SAVECOPFILE_FREE(&PL_compiling);
57843af0 4077 CopFILE_set(&PL_compiling, tmpbuf+2);
f4dd75d9 4078 SAVECOPLINE(&PL_compiling);
57843af0 4079 CopLINE_set(&PL_compiling, 1);
d819b83a
DM		 4080 /* special case: an eval '' executed within the DB package gets lexically
4081 * placed in the first non-DB CV rather than the current CV - this
4082 * allows the debugger to execute code, find lexicals etc, in the
4083 * scope of the code being debugged. Passing &seq gets find_runcv
4084 * to do the dirty work for us */
4085 runcv = find_runcv(&seq);
a0d0e21e 4086
6b35e009 4087 PUSHBLOCK(cx, (CXt_EVAL|CXp_REAL), SP);
6b75f042 4088 PUSHEVAL(cx, 0);
f39bc417 4089 cx->blk_eval.retop = PL_op->op_next;
a0d0e21e
LW		 4090
4091 /* prepare to compile string */
4092
a44e3ce2 4093 if ((PERLDB_LINE || PERLDB_SAVESRC) && PL_curstash != PL_debstash)
bdc0bf6f 4094 save_lines(CopFILEAV(&PL_compiling), PL_parser->linestr);
78da7625 4095 else {
c8cb8d55
FC		 4096 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
4097 deleting the eval's FILEGV from the stash before gv_check() runs
4098 (i.e. before run-time proper). To work around the coredump that
4099 ensues, we always turn GvMULTI_on for any globals that were
4100 introduced within evals. See force_ident(). GSAR 96-10-12 */
78da7625
FC		 4101 char *const safestr = savepvn(tmpbuf, len);
4102 SAVEDELETE(PL_defstash, safestr, len);
4103 saved_delete = TRUE;
4104 }
4105
a0d0e21e 4106 PUTBACK;
f9bddea7 4107
104a8185 4108 if (doeval(gimme, runcv, seq, saved_hh)) {
f9bddea7
NC		 4109 if (was != PL_breakable_sub_gen /* Some subs defined here. */
4110 ? (PERLDB_LINE || PERLDB_SAVESRC)
4111 : PERLDB_SAVESRC_NOSUBS) {
4112 /* Retain the filegv we created. */
78da7625 4113 } else if (!saved_delete) {
f9bddea7
NC		 4114 char *const safestr = savepvn(tmpbuf, len);
4115 SAVEDELETE(PL_defstash, safestr, len);
4116 }
4117 return DOCATCH(PL_eval_start);
4118 } else {
486ec47a 4119 /* We have already left the scope set up earlier thanks to the LEAVE
f9bddea7 4120 in doeval(). */
eb044b10
NC		 4121 if (was != PL_breakable_sub_gen /* Some subs defined here. */
4122 ? (PERLDB_LINE || PERLDB_SAVESRC)
4123 : PERLDB_SAVESRC_INVALID) {
f9bddea7 4124 /* Retain the filegv we created. */
7857f360 4125 } else if (!saved_delete) {
f9bddea7
NC		 4126 (void)hv_delete(PL_defstash, tmpbuf, len, G_DISCARD);
4127 }
4128 return PL_op->op_next;
4129 }
a0d0e21e
LW		 4130}
4131
4132PP(pp_leaveeval)
4133{
27da23d5 4134 dVAR; dSP;
a0d0e21e
LW		 4135 SV **newsp;
4136 PMOP *newpm;
4137 I32 gimme;
c09156bb 4138 register PERL_CONTEXT *cx;
a0d0e21e 4139 OP *retop;
06b5626a 4140 const U8 save_flags = PL_op -> op_flags;
a0d0e21e 4141 I32 optype;
b6494f15 4142 SV *namesv;
676a678a 4143 CV *evalcv;
a0d0e21e 4144
011c3814 4145 PERL_ASYNC_CHECK();
a0d0e21e
LW		 4146 POPBLOCK(cx,newpm);
4147 POPEVAL(cx);
b6494f15 4148 namesv = cx->blk_eval.old_namesv;
f39bc417 4149 retop = cx->blk_eval.retop;
676a678a 4150 evalcv = cx->blk_eval.cv;
a0d0e21e 4151
a1f49e72 4152 TAINT_NOT;
b9d76716
VP		 4153 SP = adjust_stack_on_leave((gimme == G_VOID) ? SP : newsp, SP, newsp,
4154 gimme, SVs_TEMP);
3280af22 4155 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e 4156
4fdae800 4157#ifdef DEBUGGING
676a678a 4158 assert(CvDEPTH(evalcv) == 1);
4fdae800 4159#endif
676a678a 4160 CvDEPTH(evalcv) = 0;
4fdae800 4161
1ce6579f 4162 if (optype == OP_REQUIRE &&
924508f0 4163 !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp))
54310121 4164 {
1ce6579f 4165 /* Unassume the success we assumed earlier. */
b6494f15 4166 (void)hv_delete(GvHVn(PL_incgv),
ecad31f0 4167 SvPVX_const(namesv),
c60dbbc3 4168 SvUTF8(namesv) ? -(I32)SvCUR(namesv) : (I32)SvCUR(namesv),
b6494f15
VP		 4169 G_DISCARD);
4170 retop = Perl_die(aTHX_ "%"SVf" did not return a true value",
4171 SVfARG(namesv));
c5df3096 4172 /* die_unwind() did LEAVE, or we won't be here */
f46d017c
GS		 4173 }
4174 else {
d343c3ef 4175 LEAVE_with_name("eval");
8433848b 4176 if (!(save_flags & OPf_SPECIAL)) {
ab69dbc2 4177 CLEAR_ERRSV();
8433848b 4178 }
a0d0e21e 4179 }
a0d0e21e
LW		 4180
4181 RETURNOP(retop);
4182}
4183
edb2152a
NC		 4184/* Common code for Perl_call_sv and Perl_fold_constants, put here to keep it
4185 close to the related Perl_create_eval_scope. */
4186void
4187Perl_delete_eval_scope(pTHX)
a0d0e21e 4188{
edb2152a
NC		 4189 SV **newsp;
4190 PMOP *newpm;
4191 I32 gimme;
c09156bb 4192 register PERL_CONTEXT *cx;
edb2152a
NC		 4193 I32 optype;
4194
4195 POPBLOCK(cx,newpm);
4196 POPEVAL(cx);
4197 PL_curpm = newpm;
d343c3ef 4198 LEAVE_with_name("eval_scope");
edb2152a
NC		 4199 PERL_UNUSED_VAR(newsp);
4200 PERL_UNUSED_VAR(gimme);
4201 PERL_UNUSED_VAR(optype);
4202}
a0d0e21e 4203
edb2152a
NC		 4204/* Common-ish code salvaged from Perl_call_sv and pp_entertry, because it was
4205 also needed by Perl_fold_constants. */
4206PERL_CONTEXT *
4207Perl_create_eval_scope(pTHX_ U32 flags)
4208{
4209 PERL_CONTEXT *cx;
4210 const I32 gimme = GIMME_V;
4211
d343c3ef 4212 ENTER_with_name("eval_scope");
a0d0e21e
LW		 4213 SAVETMPS;
4214
edb2152a 4215 PUSHBLOCK(cx, (CXt_EVAL|CXp_TRYBLOCK), PL_stack_sp);
6b75f042 4216 PUSHEVAL(cx, 0);
a0d0e21e 4217
faef0170 4218 PL_in_eval = EVAL_INEVAL;
edb2152a
NC		 4219 if (flags & G_KEEPERR)
4220 PL_in_eval |= EVAL_KEEPERR;
ab69dbc2
RGS		 4221 else
4222 CLEAR_ERRSV();
edb2152a
NC		 4223 if (flags & G_FAKINGEVAL) {
4224 PL_eval_root = PL_op; /* Only needed so that goto works right. */
4225 }
4226 return cx;
4227}
4228
4229PP(pp_entertry)
4230{
4231 dVAR;
df528165 4232 PERL_CONTEXT * const cx = create_eval_scope(0);
edb2152a 4233 cx->blk_eval.retop = cLOGOP->op_other->op_next;
533c011a 4234 return DOCATCH(PL_op->op_next);
a0d0e21e
LW		 4235}
4236
4237PP(pp_leavetry)
4238{
27da23d5 4239 dVAR; dSP;
a0d0e21e
LW		 4240 SV **newsp;
4241 PMOP *newpm;
4242 I32 gimme;
c09156bb 4243 register PERL_CONTEXT *cx;
a0d0e21e
LW		 4244 I32 optype;
4245
011c3814 4246 PERL_ASYNC_CHECK();
a0d0e21e
LW		 4247 POPBLOCK(cx,newpm);
4248 POPEVAL(cx);
9d4ba2ae 4249 PERL_UNUSED_VAR(optype);
a0d0e21e 4250
a1f49e72 4251 TAINT_NOT;
b9d76716 4252 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP);
3280af22 4253 PL_curpm = newpm; /* Don't pop $1 et al till now */
a0d0e21e 4254
d343c3ef 4255 LEAVE_with_name("eval_scope");
ab69dbc2 4256 CLEAR_ERRSV();
745cf2ff 4257 RETURN;
a0d0e21e
LW		 4258}
4259
0d863452
RH		 4260PP(pp_entergiven)
4261{
4262 dVAR; dSP;
4263 register PERL_CONTEXT *cx;
4264 const I32 gimme = GIMME_V;
4265
d343c3ef 4266 ENTER_with_name("given");
0d863452
RH		 4267 SAVETMPS;
4268
87e4a53a 4269 SAVECLEARSV(PAD_SVl(PL_op->op_targ));
f7010667 4270 sv_setsv_mg(PAD_SV(PL_op->op_targ), POPs);
0d863452
RH		 4271
4272 PUSHBLOCK(cx, CXt_GIVEN, SP);
4273 PUSHGIVEN(cx);
4274
4275 RETURN;
4276}
4277
4278PP(pp_leavegiven)
4279{
4280 dVAR; dSP;
4281 register PERL_CONTEXT *cx;
4282 I32 gimme;
4283 SV **newsp;
4284 PMOP *newpm;
96a5add6 4285 PERL_UNUSED_CONTEXT;
0d863452
RH		 4286
4287 POPBLOCK(cx,newpm);
4288 assert(CxTYPE(cx) == CXt_GIVEN);
0d863452 4289
25b991bf 4290 TAINT_NOT;
b9d76716 4291 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP);
25b991bf 4292 PL_curpm = newpm; /* Don't pop $1 et al till now */
0d863452 4293
d343c3ef 4294 LEAVE_with_name("given");
25b991bf 4295 RETURN;
0d863452
RH		 4296}
4297
4298/* Helper routines used by pp_smartmatch */
4136a0f7 4299STATIC PMOP *
84679df5 4300S_make_matcher(pTHX_ REGEXP *re)
0d863452 4301{
97aff369 4302 dVAR;
0d863452 4303 PMOP *matcher = (PMOP *) newPMOP(OP_MATCH, OPf_WANT_SCALAR | OPf_STACKED);
7918f24d
NC		 4304
4305 PERL_ARGS_ASSERT_MAKE_MATCHER;
4306
d6106309 4307 PM_SETRE(matcher, ReREFCNT_inc(re));
7918f24d 4308
0d863452 4309 SAVEFREEOP((OP *) matcher);
d343c3ef 4310 ENTER_with_name("matcher"); SAVETMPS;
0d863452
RH		 4311 SAVEOP();
4312 return matcher;
4313}
4314
4136a0f7 4315STATIC bool
0d863452
RH		 4316S_matcher_matches_sv(pTHX_ PMOP *matcher, SV *sv)
4317{
97aff369 4318 dVAR;
0d863452 4319 dSP;
7918f24d
NC		 4320
4321 PERL_ARGS_ASSERT_MATCHER_MATCHES_SV;
0d863452
RH		 4322
4323 PL_op = (OP *) matcher;
4324 XPUSHs(sv);
4325 PUTBACK;
897d3989 4326 (void) Perl_pp_match(aTHX);
0d863452
RH		 4327 SPAGAIN;
4328 return (SvTRUEx(POPs));
4329}
4330
4136a0f7 4331STATIC void
0d863452
RH		 4332S_destroy_matcher(pTHX_ PMOP *matcher)
4333{
97aff369 4334 dVAR;
7918f24d
NC		 4335
4336 PERL_ARGS_ASSERT_DESTROY_MATCHER;
0d863452 4337 PERL_UNUSED_ARG(matcher);
7918f24d 4338
0d863452 4339 FREETMPS;
d343c3ef 4340 LEAVE_with_name("matcher");
0d863452
RH		 4341}
4342
4343/* Do a smart match */
4344PP(pp_smartmatch)
4345{
d7c0d282 4346 DEBUG_M(Perl_deb(aTHX_ "Starting smart match resolution\n"));
be88a5c3 4347 return do_smartmatch(NULL, NULL, 0);
0d863452
RH		 4348}
4349
4b021f5f
RGS		 4350/* This version of do_smartmatch() implements the
4351 * table of smart matches that is found in perlsyn.
0d863452 4352 */
4136a0f7 4353STATIC OP *
be88a5c3 4354S_do_smartmatch(pTHX_ HV *seen_this, HV *seen_other, const bool copied)
0d863452 4355{
97aff369 4356 dVAR;
0d863452
RH		 4357 dSP;
4358
41e726ac 4359 bool object_on_left = FALSE;
0d863452
RH		 4360 SV *e = TOPs; /* e is for 'expression' */
4361 SV *d = TOPm1s; /* d is for 'default', as in PL_defgv */
a566f585 4362
6f1401dc
DM		 4363 /* Take care only to invoke mg_get() once for each argument.
4364 * Currently we do this by copying the SV if it's magical. */
4365 if (d) {
be88a5c3 4366 if (!copied && SvGMAGICAL(d))
6f1401dc
DM		 4367 d = sv_mortalcopy(d);
4368 }
4369 else
4370 d = &PL_sv_undef;
4371
4372 assert(e);
4373 if (SvGMAGICAL(e))
4374 e = sv_mortalcopy(e);
4375
2c9d2554 4376 /* First of all, handle overload magic of the rightmost argument */
6d743019 4377 if (SvAMAGIC(e)) {
d7c0d282
DM		 4378 SV * tmpsv;
4379 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Object\n"));
4380 DEBUG_M(Perl_deb(aTHX_ " attempting overload\n"));
4381
b900a653 4382 tmpsv = amagic_call(d, e, smart_amg, AMGf_noleft);
7c41e62e
RGS		 4383 if (tmpsv) {
4384 SPAGAIN;
4385 (void)POPs;
4386 SETs(tmpsv);
4387 RETURN;
4388 }
d7c0d282 4389 DEBUG_M(Perl_deb(aTHX_ " failed to run overload method; continuing...\n"));
7c41e62e 4390 }
62ec5f58 4391
0d863452
RH		 4392 SP -= 2; /* Pop the values */
4393
0d863452 4394
b0138e99 4395 /* ~~ undef */
62ec5f58 4396 if (!SvOK(e)) {
d7c0d282 4397 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-undef\n"));
62ec5f58 4398 if (SvOK(d))
33570f8b
RGS		 4399 RETPUSHNO;
4400 else
62ec5f58 4401 RETPUSHYES;
33570f8b 4402 }
e67b97bd 4403
d7c0d282
DM		 4404 if (sv_isobject(e) && (SvTYPE(SvRV(e)) != SVt_REGEXP)) {
4405 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Object\n"));
62ec5f58 4406 Perl_croak(aTHX_ "Smart matching a non-overloaded object breaks encapsulation");
d7c0d282 4407 }
41e726ac
RGS		 4408 if (sv_isobject(d) && (SvTYPE(SvRV(d)) != SVt_REGEXP))
4409 object_on_left = TRUE;
62ec5f58 4410
b0138e99 4411 /* ~~ sub */
a4a197da 4412 if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVCV) {
0d863452 4413 I32 c;
41e726ac
RGS		 4414 if (object_on_left) {
4415 goto sm_any_sub; /* Treat objects like scalars */
4416 }
4417 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) {
a4a197da
RGS		 4418 /* Test sub truth for each key */
4419 HE *he;
4420 bool andedresults = TRUE;
4421 HV *hv = (HV*) SvRV(d);
168ff818 4422 I32 numkeys = hv_iterinit(hv);
d7c0d282 4423 DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-CodeRef\n"));
168ff818 4424 if (numkeys == 0)
07edf497 4425 RETPUSHYES;
a4a197da 4426 while ( (he = hv_iternext(hv)) ) {
d7c0d282 4427 DEBUG_M(Perl_deb(aTHX_ " testing hash key...\n"));
d343c3ef 4428 ENTER_with_name("smartmatch_hash_key_test");
a4a197da
RGS		 4429 SAVETMPS;
4430 PUSHMARK(SP);
4431 PUSHs(hv_iterkeysv(he));
4432 PUTBACK;
4433 c = call_sv(e, G_SCALAR);
4434 SPAGAIN;
4435 if (c == 0)
4436 andedresults = FALSE;
4437 else
4438 andedresults = SvTRUEx(POPs) && andedresults;
4439 FREETMPS;
d343c3ef 4440 LEAVE_with_name("smartmatch_hash_key_test");
a4a197da
RGS		 4441 }
4442 if (andedresults)
4443 RETPUSHYES;
4444 else
4445 RETPUSHNO;
4446 }
4447 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
4448 /* Test sub truth for each element */
4449 I32 i;
4450 bool andedresults = TRUE;
4451 AV *av = (AV*) SvRV(d);
4452 const I32 len = av_len(av);
d7c0d282 4453 DEBUG_M(Perl_deb(aTHX_ " applying rule Array-CodeRef\n"));
168ff818 4454 if (len == -1)
07edf497 4455 RETPUSHYES;
a4a197da
RGS		 4456 for (i = 0; i <= len; ++i) {
4457 SV * const * const svp = av_fetch(av, i, FALSE);
d7c0d282 4458 DEBUG_M(Perl_deb(aTHX_ " testing array element...\n"));
d343c3ef 4459 ENTER_with_name("smartmatch_array_elem_test");
a4a197da
RGS		 4460 SAVETMPS;
4461 PUSHMARK(SP);
4462 if (svp)
4463 PUSHs(*svp);
4464 PUTBACK;
4465 c = call_sv(e, G_SCALAR);
4466 SPAGAIN;
4467 if (c == 0)
4468 andedresults = FALSE;
4469 else
4470 andedresults = SvTRUEx(POPs) && andedresults;
4471 FREETMPS;
d343c3ef 4472 LEAVE_with_name("smartmatch_array_elem_test");
a4a197da
RGS		 4473 }
4474 if (andedresults)
4475 RETPUSHYES;
4476 else
4477 RETPUSHNO;
4478 }
4479 else {
41e726ac 4480 sm_any_sub:
d7c0d282 4481 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-CodeRef\n"));
d343c3ef 4482 ENTER_with_name("smartmatch_coderef");
a4a197da
RGS		 4483 SAVETMPS;
4484 PUSHMARK(SP);
4485 PUSHs(d);
4486 PUTBACK;
4487 c = call_sv(e, G_SCALAR);
4488 SPAGAIN;
4489 if (c == 0)
4490 PUSHs(&PL_sv_no);
4491 else if (SvTEMP(TOPs))
4492 SvREFCNT_inc_void(TOPs);
4493 FREETMPS;
d343c3ef 4494 LEAVE_with_name("smartmatch_coderef");
a4a197da
RGS		 4495 RETURN;
4496 }
0d863452 4497 }
b0138e99 4498 /* ~~ %hash */
61a621c6 4499 else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVHV) {
41e726ac
RGS		 4500 if (object_on_left) {
4501 goto sm_any_hash; /* Treat objects like scalars */
4502 }
4503 else if (!SvOK(d)) {
d7c0d282 4504 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Hash ($a undef)\n"));
61a621c6
RGS		 4505 RETPUSHNO;
4506 }
4507 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) {
0d863452
RH		 4508 /* Check that the key-sets are identical */
4509 HE *he;
61a621c6 4510 HV *other_hv = MUTABLE_HV(SvRV(d));
0d863452
RH		 4511 bool tied = FALSE;
4512 bool other_tied = FALSE;
4513 U32 this_key_count = 0,
4514 other_key_count = 0;
33ed63a2 4515 HV *hv = MUTABLE_HV(SvRV(e));
d7c0d282
DM		 4516
4517 DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Hash\n"));
0d863452 4518 /* Tied hashes don't know how many keys they have. */
33ed63a2 4519 if (SvTIED_mg((SV*)hv, PERL_MAGIC_tied)) {
0d863452
RH		 4520 tied = TRUE;
4521 }
ad64d0ec 4522 else if (SvTIED_mg((const SV *)other_hv, PERL_MAGIC_tied)) {
c445ea15 4523 HV * const temp = other_hv;
33ed63a2
RGS		 4524 other_hv = hv;
4525 hv = temp;
0d863452
RH		 4526 tied = TRUE;
4527 }
ad64d0ec 4528 if (SvTIED_mg((const SV *)other_hv, PERL_MAGIC_tied))
0d863452
RH		 4529 other_tied = TRUE;
4530
33ed63a2 4531 if (!tied && HvUSEDKEYS((const HV *) hv) != HvUSEDKEYS(other_hv))
0d863452
RH		 4532 RETPUSHNO;
4533
4534 /* The hashes have the same number of keys, so it suffices
4535 to check that one is a subset of the other. */
33ed63a2
RGS		 4536 (void) hv_iterinit(hv);
4537 while ( (he = hv_iternext(hv)) ) {
b15feb55 4538 SV *key = hv_iterkeysv(he);
d7c0d282
DM		 4539
4540 DEBUG_M(Perl_deb(aTHX_ " comparing hash key...\n"));
0d863452
RH		 4541 ++ this_key_count;
4542
b15feb55 4543 if(!hv_exists_ent(other_hv, key, 0)) {
33ed63a2 4544 (void) hv_iterinit(hv); /* reset iterator */
0d863452
RH		 4545 RETPUSHNO;
4546 }
4547 }
4548
4549 if (other_tied) {
4550 (void) hv_iterinit(other_hv);
4551 while ( hv_iternext(other_hv) )
4552 ++other_key_count;
4553 }
4554 else
4555 other_key_count = HvUSEDKEYS(other_hv);
4556
4557 if (this_key_count != other_key_count)
4558 RETPUSHNO;
4559 else
4560 RETPUSHYES;
4561 }
61a621c6
RGS		 4562 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
4563 AV * const other_av = MUTABLE_AV(SvRV(d));
c445ea15 4564 const I32 other_len = av_len(other_av) + 1;
0d863452 4565 I32 i;
33ed63a2 4566 HV *hv = MUTABLE_HV(SvRV(e));
71b0fb34 4567
d7c0d282 4568 DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Hash\n"));
71b0fb34 4569 for (i = 0; i < other_len; ++i) {
c445ea15 4570 SV ** const svp = av_fetch(other_av, i, FALSE);
d7c0d282 4571 DEBUG_M(Perl_deb(aTHX_ " checking for key existence...\n"));
71b0fb34 4572 if (svp) { /* ??? When can this not happen? */
b15feb55 4573 if (hv_exists_ent(hv, *svp, 0))
71b0fb34
DK		 4574 RETPUSHYES;
4575 }
0d863452 4576 }
71b0fb34 4577 RETPUSHNO;
0d863452 4578 }
a566f585 4579 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_REGEXP) {
d7c0d282 4580 DEBUG_M(Perl_deb(aTHX_ " applying rule Regex-Hash\n"));
ea0c2dbd
RGS		 4581 sm_regex_hash:
4582 {
4583 PMOP * const matcher = make_matcher((REGEXP*) SvRV(d));
4584 HE *he;
4585 HV *hv = MUTABLE_HV(SvRV(e));
4586
4587 (void) hv_iterinit(hv);
4588 while ( (he = hv_iternext(hv)) ) {
d7c0d282 4589 DEBUG_M(Perl_deb(aTHX_ " testing key against pattern...\n"));
ea0c2dbd
RGS		 4590 if (matcher_matches_sv(matcher, hv_iterkeysv(he))) {
4591 (void) hv_iterinit(hv);
4592 destroy_matcher(matcher);
4593 RETPUSHYES;
4594 }
0d863452 4595 }
ea0c2dbd
RGS		 4596 destroy_matcher(matcher);
4597 RETPUSHNO;
0d863452 4598 }
0d863452
RH		 4599 }
4600 else {
41e726ac 4601 sm_any_hash:
d7c0d282 4602 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Hash\n"));
61a621c6 4603 if (hv_exists_ent(MUTABLE_HV(SvRV(e)), d, 0))
0d863452
RH		 4604 RETPUSHYES;
4605 else
4606 RETPUSHNO;
4607 }
4608 }
b0138e99
RGS		 4609 /* ~~ @array */
4610 else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_PVAV) {
41e726ac
RGS		 4611 if (object_on_left) {
4612 goto sm_any_array; /* Treat objects like scalars */
4613 }
4614 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) {
b0138e99
RGS		 4615 AV * const other_av = MUTABLE_AV(SvRV(e));
4616 const I32 other_len = av_len(other_av) + 1;
4617 I32 i;
4618
d7c0d282 4619 DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Array\n"));
b0138e99
RGS		 4620 for (i = 0; i < other_len; ++i) {
4621 SV ** const svp = av_fetch(other_av, i, FALSE);
d7c0d282
DM		 4622
4623 DEBUG_M(Perl_deb(aTHX_ " testing for key existence...\n"));
b0138e99 4624 if (svp) { /* ??? When can this not happen? */
b15feb55 4625 if (hv_exists_ent(MUTABLE_HV(SvRV(d)), *svp, 0))
b0138e99
RGS		 4626 RETPUSHYES;
4627 }
4628 }
4629 RETPUSHNO;
4630 }
4631 if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
4632 AV *other_av = MUTABLE_AV(SvRV(d));
d7c0d282 4633 DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Array\n"));
b0138e99 4634 if (av_len(MUTABLE_AV(SvRV(e))) != av_len(other_av))
0d863452
RH		 4635 RETPUSHNO;
4636 else {
4637 I32 i;
c445ea15 4638 const I32 other_len = av_len(other_av);
0d863452 4639
a0714e2c 4640 if (NULL == seen_this) {
0d863452 4641 seen_this = newHV();
ad64d0ec 4642 (void) sv_2mortal(MUTABLE_SV(seen_this));
0d863452 4643 }
a0714e2c 4644 if (NULL == seen_other) {
6bc991bf 4645 seen_other = newHV();
ad64d0ec 4646 (void) sv_2mortal(MUTABLE_SV(seen_other));
0d863452
RH		 4647 }
4648 for(i = 0; i <= other_len; ++i) {
b0138e99 4649 SV * const * const this_elem = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE);
c445ea15
AL		 4650 SV * const * const other_elem = av_fetch(other_av, i, FALSE);
4651
0d863452 4652 if (!this_elem || !other_elem) {
69c3dccf
RGS		 4653 if ((this_elem && SvOK(*this_elem))
4654 || (other_elem && SvOK(*other_elem)))
0d863452
RH		 4655 RETPUSHNO;
4656 }
365c4e3d
RGS		 4657 else if (hv_exists_ent(seen_this,
4658 sv_2mortal(newSViv(PTR2IV(*this_elem))), 0) ||
4659 hv_exists_ent(seen_other,
4660 sv_2mortal(newSViv(PTR2IV(*other_elem))), 0))
0d863452
RH		 4661 {
4662 if (*this_elem != *other_elem)
4663 RETPUSHNO;
4664 }
4665 else {
04fe65b0
RGS		 4666 (void)hv_store_ent(seen_this,
4667 sv_2mortal(newSViv(PTR2IV(*this_elem))),
4668 &PL_sv_undef, 0);
4669 (void)hv_store_ent(seen_other,
4670 sv_2mortal(newSViv(PTR2IV(*other_elem))),
4671 &PL_sv_undef, 0);
0d863452 4672 PUSHs(*other_elem);
a566f585 4673 PUSHs(*this_elem);
0d863452
RH		 4674
4675 PUTBACK;
d7c0d282 4676 DEBUG_M(Perl_deb(aTHX_ " recursively comparing array element...\n"));
be88a5c3 4677 (void) do_smartmatch(seen_this, seen_other, 0);
0d863452 4678 SPAGAIN;
d7c0d282 4679 DEBUG_M(Perl_deb(aTHX_ " recursion finished\n"));
0d863452
RH		 4680
4681 if (!SvTRUEx(POPs))
4682 RETPUSHNO;
4683 }
4684 }
4685 RETPUSHYES;
4686 }
4687 }
a566f585 4688 else if (SvROK(d) && SvTYPE(SvRV(d)) == SVt_REGEXP) {
d7c0d282 4689 DEBUG_M(Perl_deb(aTHX_ " applying rule Regex-Array\n"));
ea0c2dbd
RGS		 4690 sm_regex_array:
4691 {
4692 PMOP * const matcher = make_matcher((REGEXP*) SvRV(d));
4693 const I32 this_len = av_len(MUTABLE_AV(SvRV(e)));
4694 I32 i;
0d863452 4695
ea0c2dbd
RGS		 4696 for(i = 0; i <= this_len; ++i) {
4697 SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE);
d7c0d282 4698 DEBUG_M(Perl_deb(aTHX_ " testing element against pattern...\n"));
ea0c2dbd
RGS		 4699 if (svp && matcher_matches_sv(matcher, *svp)) {
4700 destroy_matcher(matcher);
4701 RETPUSHYES;
4702 }
0d863452 4703 }
ea0c2dbd
RGS		 4704 destroy_matcher(matcher);
4705 RETPUSHNO;
0d863452 4706 }
0d863452 4707 }
015eb7b9
RGS		 4708 else if (!SvOK(d)) {
4709 /* undef ~~ array */
4710 const I32 this_len = av_len(MUTABLE_AV(SvRV(e)));
0d863452
RH		 4711 I32 i;
4712
d7c0d282 4713 DEBUG_M(Perl_deb(aTHX_ " applying rule Undef-Array\n"));
015eb7b9 4714 for (i = 0; i <= this_len; ++i) {
b0138e99 4715 SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE);
d7c0d282 4716 DEBUG_M(Perl_deb(aTHX_ " testing for undef element...\n"));
015eb7b9 4717 if (!svp || !SvOK(*svp))
0d863452
RH		 4718 RETPUSHYES;
4719 }
4720 RETPUSHNO;
4721 }
015eb7b9 4722 else {
41e726ac
RGS		 4723 sm_any_array:
4724 {
4725 I32 i;
4726 const I32 this_len = av_len(MUTABLE_AV(SvRV(e)));
0d863452 4727
d7c0d282 4728 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Array\n"));
41e726ac
RGS		 4729 for (i = 0; i <= this_len; ++i) {
4730 SV * const * const svp = av_fetch(MUTABLE_AV(SvRV(e)), i, FALSE);
4731 if (!svp)
4732 continue;
015eb7b9 4733
41e726ac
RGS		 4734 PUSHs(d);
4735 PUSHs(*svp);
4736 PUTBACK;
4737 /* infinite recursion isn't supposed to happen here */
d7c0d282 4738 DEBUG_M(Perl_deb(aTHX_ " recursively testing array element...\n"));
be88a5c3 4739 (void) do_smartmatch(NULL, NULL, 1);
41e726ac 4740 SPAGAIN;
d7c0d282 4741 DEBUG_M(Perl_deb(aTHX_ " recursion finished\n"));
41e726ac
RGS		 4742 if (SvTRUEx(POPs))
4743 RETPUSHYES;
4744 }
4745 RETPUSHNO;
0d863452 4746 }
0d863452
RH		 4747 }
4748 }
b0138e99 4749 /* ~~ qr// */
a566f585 4750 else if (SvROK(e) && SvTYPE(SvRV(e)) == SVt_REGEXP) {
ea0c2dbd
RGS		 4751 if (!object_on_left && SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVHV) {
4752 SV *t = d; d = e; e = t;
d7c0d282 4753 DEBUG_M(Perl_deb(aTHX_ " applying rule Hash-Regex\n"));
ea0c2dbd
RGS		 4754 goto sm_regex_hash;
4755 }
4756 else if (!object_on_left && SvROK(d) && SvTYPE(SvRV(d)) == SVt_PVAV) {
4757 SV *t = d; d = e; e = t;
d7c0d282 4758 DEBUG_M(Perl_deb(aTHX_ " applying rule Array-Regex\n"));
ea0c2dbd
RGS		 4759 goto sm_regex_array;
4760 }
4761 else {
4762 PMOP * const matcher = make_matcher((REGEXP*) SvRV(e));
0d863452 4763
d7c0d282 4764 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Regex\n"));
ea0c2dbd
RGS		 4765 PUTBACK;
4766 PUSHs(matcher_matches_sv(matcher, d)
4767 ? &PL_sv_yes
4768 : &PL_sv_no);
4769 destroy_matcher(matcher);
4770 RETURN;
4771 }
0d863452 4772 }
b0138e99 4773 /* ~~ scalar */
2c9d2554
RGS		 4774 /* See if there is overload magic on left */
4775 else if (object_on_left && SvAMAGIC(d)) {
4776 SV *tmpsv;
d7c0d282
DM		 4777 DEBUG_M(Perl_deb(aTHX_ " applying rule Object-Any\n"));
4778 DEBUG_M(Perl_deb(aTHX_ " attempting overload\n"));
2c9d2554
RGS		 4779 PUSHs(d); PUSHs(e);
4780 PUTBACK;
4781 tmpsv = amagic_call(d, e, smart_amg, AMGf_noright);
4782 if (tmpsv) {
4783 SPAGAIN;
4784 (void)POPs;
4785 SETs(tmpsv);
4786 RETURN;
4787 }
4788 SP -= 2;
d7c0d282 4789 DEBUG_M(Perl_deb(aTHX_ " failed to run overload method; falling back...\n"));
2c9d2554
RGS		 4790 goto sm_any_scalar;
4791 }
fb51372e
RGS		 4792 else if (!SvOK(d)) {
4793 /* undef ~~ scalar ; we already know that the scalar is SvOK */
d7c0d282 4794 DEBUG_M(Perl_deb(aTHX_ " applying rule undef-Any\n"));
fb51372e
RGS		 4795 RETPUSHNO;
4796 }
2c9d2554
RGS		 4797 else
4798 sm_any_scalar:
4799 if (SvNIOK(e) || (SvPOK(e) && looks_like_number(e) && SvNIOK(d))) {
d7c0d282
DM		 4800 DEBUG_M(if (SvNIOK(e))
4801 Perl_deb(aTHX_ " applying rule Any-Num\n");
4802 else
4803 Perl_deb(aTHX_ " applying rule Num-numish\n");
4804 );
33ed63a2 4805 /* numeric comparison */
0d863452
RH		 4806 PUSHs(d); PUSHs(e);
4807 PUTBACK;
a98fe34d 4808 if (CopHINTS_get(PL_curcop) & HINT_INTEGER)
897d3989 4809 (void) Perl_pp_i_eq(aTHX);
0d863452 4810 else
897d3989 4811 (void) Perl_pp_eq(aTHX);
0d863452
RH		 4812 SPAGAIN;
4813 if (SvTRUEx(POPs))
4814 RETPUSHYES;
4815 else
4816 RETPUSHNO;
4817 }
4818
4819 /* As a last resort, use string comparison */
d7c0d282 4820 DEBUG_M(Perl_deb(aTHX_ " applying rule Any-Any\n"));
0d863452
RH		 4821 PUSHs(d); PUSHs(e);
4822 PUTBACK;
897d3989 4823 return Perl_pp_seq(aTHX);
0d863452
RH		 4824}
4825
4826PP(pp_enterwhen)
4827{
4828 dVAR; dSP;
4829 register PERL_CONTEXT *cx;
4830 const I32 gimme = GIMME_V;
4831
4832 /* This is essentially an optimization: if the match
4833 fails, we don't want to push a context and then
4834 pop it again right away, so we skip straight
4835 to the op that follows the leavewhen.
25b991bf 4836 RETURNOP calls PUTBACK which restores the stack pointer after the POPs.
0d863452
RH		 4837 */
4838 if ((0 == (PL_op->op_flags & OPf_SPECIAL)) && !SvTRUEx(POPs))
25b991bf 4839 RETURNOP(cLOGOP->op_other->op_next);
0d863452 4840
c08f093b 4841 ENTER_with_name("when");
0d863452
RH		 4842 SAVETMPS;
4843
4844 PUSHBLOCK(cx, CXt_WHEN, SP);
4845 PUSHWHEN(cx);
4846
4847 RETURN;
4848}
4849
4850PP(pp_leavewhen)
4851{
4852 dVAR; dSP;
c08f093b 4853 I32 cxix;
0d863452 4854 register PERL_CONTEXT *cx;
c08f093b 4855 I32 gimme;
0d863452
RH		 4856 SV **newsp;
4857 PMOP *newpm;
4858
c08f093b
VP		 4859 cxix = dopoptogiven(cxstack_ix);
4860 if (cxix < 0)
fc7debfb
FC		 4861 /* diag_listed_as: Can't "when" outside a topicalizer */
4862 DIE(aTHX_ "Can't \"%s\" outside a topicalizer",
4863 PL_op->op_flags & OPf_SPECIAL ? "default" : "when");
c08f093b 4864
0d863452
RH		 4865 POPBLOCK(cx,newpm);
4866 assert(CxTYPE(cx) == CXt_WHEN);
4867
c08f093b
VP		 4868 TAINT_NOT;
4869 SP = adjust_stack_on_leave(newsp, SP, newsp, gimme, SVs_PADTMP|SVs_TEMP);
0d863452
RH		 4870 PL_curpm = newpm; /* pop $1 et al */
4871
c08f093b
VP		 4872 LEAVE_with_name("when");
4873
4874 if (cxix < cxstack_ix)
4875 dounwind(cxix);
4876
4877 cx = &cxstack[cxix];
4878
4879 if (CxFOREACH(cx)) {
4880 /* clear off anything above the scope we're re-entering */
4881 I32 inner = PL_scopestack_ix;
4882
4883 TOPBLOCK(cx);
4884 if (PL_scopestack_ix < inner)
4885 leave_scope(PL_scopestack[PL_scopestack_ix]);
4886 PL_curcop = cx->blk_oldcop;
4887
4888 return cx->blk_loop.my_op->op_nextop;
4889 }
4890 else
b1b5a4ae 4891 RETURNOP(cx->blk_givwhen.leave_op);
0d863452
RH		 4892}
4893
4894PP(pp_continue)
4895{
c08f093b 4896 dVAR; dSP;
0d863452
RH		 4897 I32 cxix;
4898 register PERL_CONTEXT *cx;
c08f093b
VP		 4899 I32 gimme;
4900 SV **newsp;
4901 PMOP *newpm;
7be5bd17
FR		 4902
4903 PERL_UNUSED_VAR(gimme);
0d863452
RH		 4904
4905 cxix = dopoptowhen(cxstack_ix);
4906 if (cxix < 0)
4907 DIE(aTHX_ "Can't \"continue\" outside a when block");
c08f093b 4908
0d863452
RH		 4909 if (cxix < cxstack_ix)
4910 dounwind(cxix);
4911
c08f093b
VP		 4912 POPBLOCK(cx,newpm);
4913 assert(CxTYPE(cx) == CXt_WHEN);
4914
4915 SP = newsp;
4916 PL_curpm = newpm; /* pop $1 et al */
4917
4918 LEAVE_with_name("when");
4919 RETURNOP(cx->blk_givwhen.leave_op->op_next);
0d863452
RH		 4920}
4921
4922PP(pp_break)
4923{
4924 dVAR;
4925 I32 cxix;
4926 register PERL_CONTEXT *cx;
25b991bf 4927
0d863452 4928 cxix = dopoptogiven(cxstack_ix);
c08f093b
VP		 4929 if (cxix < 0)
4930 DIE(aTHX_ "Can't \"break\" outside a given block");
4931
4932 cx = &cxstack[cxix];
4933 if (CxFOREACH(cx))
0d863452
RH		 4934 DIE(aTHX_ "Can't \"break\" in a loop topicalizer");
4935
4936 if (cxix < cxstack_ix)
4937 dounwind(cxix);
0d863452 4938
0787ea8a
VP		 4939 /* Restore the sp at the time we entered the given block */
4940 TOPBLOCK(cx);
4941
c08f093b 4942 return cx->blk_givwhen.leave_op;
0d863452
RH		 4943}
4944
74e0ddf7 4945static MAGIC *
cea2e8a9 4946S_doparseform(pTHX_ SV *sv)
a0d0e21e
LW		 4947{
4948 STRLEN len;
37ffbfcc 4949 register char *s = SvPV(sv, len);
3808a683 4950 register char *send;
086b26f3
DM		 4951 register char *base = NULL; /* start of current field */
4952 register I32 skipspaces = 0; /* number of contiguous spaces seen */
4953 bool noblank = FALSE; /* ~ or ~~ seen on this line */
4954 bool repeat = FALSE; /* ~~ seen on this line */
4955 bool postspace = FALSE; /* a text field may need right padding */
dea28490
JJ		 4956 U32 *fops;
4957 register U32 *fpc;
086b26f3 4958 U32 *linepc = NULL; /* position of last FF_LINEMARK */
a0d0e21e 4959 register I32 arg;
086b26f3
DM		 4960 bool ischop; /* it's a ^ rather than a @ */
4961 bool unchopnum = FALSE; /* at least one @ (i.e. non-chop) num field seen */
a1b95068 4962 int maxops = 12; /* FF_LINEMARK + FF_END + 10 (\0 without preceding \n) */
3808a683
DM		 4963 MAGIC *mg = NULL;
4964 SV *sv_copy;
a0d0e21e 4965
7918f24d
NC		 4966 PERL_ARGS_ASSERT_DOPARSEFORM;
4967
55497cff 4968 if (len == 0)
cea2e8a9 4969 Perl_croak(aTHX_ "Null picture in formline");
ac27b0f5 4970
3808a683
DM		 4971 if (SvTYPE(sv) >= SVt_PVMG) {
4972 /* This might, of course, still return NULL. */
4973 mg = mg_find(sv, PERL_MAGIC_fm);
4974 } else {
4975 sv_upgrade(sv, SVt_PVMG);
4976 }
4977
4978 if (mg) {
4979 /* still the same as previously-compiled string? */
4980 SV *old = mg->mg_obj;
4981 if ( !(!!SvUTF8(old) ^ !!SvUTF8(sv))
4982 && len == SvCUR(old)
4983 && strnEQ(SvPVX(old), SvPVX(sv), len)
b57b1734
DM		 4984 ) {
4985 DEBUG_f(PerlIO_printf(Perl_debug_log,"Re-using compiled format\n"));
3808a683 4986 return mg;
b57b1734 4987 }
3808a683 4988
b57b1734 4989 DEBUG_f(PerlIO_printf(Perl_debug_log, "Re-compiling format\n"));
3808a683
DM		 4990 Safefree(mg->mg_ptr);
4991 mg->mg_ptr = NULL;
4992 SvREFCNT_dec(old);
4993 mg->mg_obj = NULL;
4994 }
b57b1734
DM		 4995 else {
4996 DEBUG_f(PerlIO_printf(Perl_debug_log, "Compiling format\n"));
3808a683 4997 mg = sv_magicext(sv, NULL, PERL_MAGIC_fm, &PL_vtbl_fm, NULL, 0);
b57b1734 4998 }
3808a683
DM		 4999
5000 sv_copy = newSVpvn_utf8(s, len, SvUTF8(sv));
5001 s = SvPV(sv_copy, len); /* work on the copy, not the original */
5002 send = s + len;
5003
5004
815f25c6
DM		 5005 /* estimate the buffer size needed */
5006 for (base = s; s <= send; s++) {
a1b95068 5007 if (*s == '\n' || *s == '@' || *s == '^')
815f25c6
DM		 5008 maxops += 10;
5009 }
5010 s = base;
c445ea15 5011 base = NULL;
815f25c6 5012
a02a5408 5013 Newx(fops, maxops, U32);
a0d0e21e
LW		 5014 fpc = fops;
5015
5016 if (s < send) {
5017 linepc = fpc;
5018 *fpc++ = FF_LINEMARK;
5019 noblank = repeat = FALSE;
5020 base = s;
5021 }
5022
5023 while (s <= send) {
5024 switch (*s++) {
5025 default:
5026 skipspaces = 0;
5027 continue;
5028
5029 case '~':
5030 if (*s == '~') {
5031 repeat = TRUE;
b57b1734
DM		 5032 skipspaces++;
5033 s++;
a0d0e21e
LW		 5034 }
5035 noblank = TRUE;
a0d0e21e
LW		 5036 /* FALL THROUGH */
5037 case ' ': case '\t':
5038 skipspaces++;
5039 continue;
a1b95068
WL		 5040 case 0:
5041 if (s < send) {
5042 skipspaces = 0;
5043 continue;
5044 } /* else FALL THROUGH */
5045 case '\n':
a0d0e21e
LW		 5046 arg = s - base;
5047 skipspaces++;
5048 arg -= skipspaces;
5049 if (arg) {
5f05dabc 5050 if (postspace)
a0d0e21e 5051 *fpc++ = FF_SPACE;
a0d0e21e 5052 *fpc++ = FF_LITERAL;
76912796 5053 *fpc++ = (U32)arg;
a0d0e21e 5054 }
5f05dabc 5055 postspace = FALSE;
a0d0e21e
LW		 5056 if (s <= send)
5057 skipspaces--;
5058 if (skipspaces) {
5059 *fpc++ = FF_SKIP;
76912796 5060 *fpc++ = (U32)skipspaces;
a0d0e21e
LW		 5061 }
5062 skipspaces = 0;
5063 if (s <= send)
5064 *fpc++ = FF_NEWLINE;
5065 if (noblank) {
5066 *fpc++ = FF_BLANK;
5067 if (repeat)
5068 arg = fpc - linepc + 1;
5069 else
5070 arg = 0;
76912796 5071 *fpc++ = (U32)arg;
a0d0e21e
LW		 5072 }
5073 if (s < send) {
5074 linepc = fpc;
5075 *fpc++ = FF_LINEMARK;
5076 noblank = repeat = FALSE;
5077 base = s;
5078 }
5079 else
5080 s++;
5081 continue;
5082
5083 case '@':
5084 case '^':
5085 ischop = s[-1] == '^';
5086
5087 if (postspace) {
5088 *fpc++ = FF_SPACE;
5089 postspace = FALSE;
5090 }
5091 arg = (s - base) - 1;
5092 if (arg) {
5093 *fpc++ = FF_LITERAL;
76912796 5094 *fpc++ = (U32)arg;
a0d0e21e
LW		 5095 }
5096
5097 base = s - 1;
5098 *fpc++ = FF_FETCH;
086b26f3 5099 if (*s == '*') { /* @* or ^* */
a0d0e21e 5100 s++;
a1b95068
WL		 5101 *fpc++ = 2; /* skip the @* or ^* */
5102 if (ischop) {
5103 *fpc++ = FF_LINESNGL;
5104 *fpc++ = FF_CHOP;
5105 } else
5106 *fpc++ = FF_LINEGLOB;
a0d0e21e 5107 }
086b26f3 5108 else if (*s == '#' || (*s == '.' && s[1] == '#')) { /* @###, ^### */
a701009a 5109 arg = ischop ? FORM_NUM_BLANK : 0;
a0d0e21e
LW		 5110 base = s - 1;
5111 while (*s == '#')
5112 s++;
5113 if (*s == '.') {
06b5626a 5114 const char * const f = ++s;
a0d0e21e
LW		 5115 while (*s == '#')
5116 s++;
a701009a 5117 arg |= FORM_NUM_POINT + (s - f);
a0d0e21e
LW		 5118 }
5119 *fpc++ = s - base; /* fieldsize for FETCH */
5120 *fpc++ = FF_DECIMAL;
76912796 5121 *fpc++ = (U32)arg;
a1b95068 5122 unchopnum |= ! ischop;
784707d5
JP		 5123 }
5124 else if (*s == '0' && s[1] == '#') { /* Zero padded decimals */
a701009a 5125 arg = ischop ? FORM_NUM_BLANK : 0;
784707d5
JP		 5126 base = s - 1;
5127 s++; /* skip the '0' first */
5128 while (*s == '#')
5129 s++;
5130 if (*s == '.') {
06b5626a 5131 const char * const f = ++s;
784707d5
JP		 5132 while (*s == '#')
5133 s++;
a701009a 5134 arg |= FORM_NUM_POINT + (s - f);
784707d5
JP		 5135 }
5136 *fpc++ = s - base; /* fieldsize for FETCH */
5137 *fpc++ = FF_0DECIMAL;
76912796 5138 *fpc++ = (U32)arg;
a1b95068 5139 unchopnum |= ! ischop;
a0d0e21e 5140 }
086b26f3 5141 else { /* text field */
a0d0e21e
LW		 5142 I32 prespace = 0;
5143 bool ismore = FALSE;
5144
5145 if (*s == '>') {
5146 while (*++s == '>') ;
5147 prespace = FF_SPACE;
5148 }
5149 else if (*s == '|') {
5150 while (*++s == '|') ;
5151 prespace = FF_HALFSPACE;
5152 postspace = TRUE;
5153 }
5154 else {
5155 if (*s == '<')
5156 while (*++s == '<') ;
5157 postspace = TRUE;
5158 }
5159 if (*s == '.' && s[1] == '.' && s[2] == '.') {
5160 s += 3;
5161 ismore = TRUE;
5162 }
5163 *fpc++ = s - base; /* fieldsize for FETCH */
5164
5165 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
5166
5167 if (prespace)
76912796 5168 *fpc++ = (U32)prespace; /* add SPACE or HALFSPACE */
a0d0e21e
LW		 5169 *fpc++ = FF_ITEM;
5170 if (ismore)
5171 *fpc++ = FF_MORE;
5172 if (ischop)
5173 *fpc++ = FF_CHOP;
5174 }
5175 base = s;
5176 skipspaces = 0;
5177 continue;
5178 }
5179 }
5180 *fpc++ = FF_END;
5181
815f25c6 5182 assert (fpc <= fops + maxops); /* ensure our buffer estimate was valid */
a0d0e21e 5183 arg = fpc - fops;
74e0ddf7 5184
3808a683 5185 mg->mg_ptr = (char *) fops;
74e0ddf7 5186 mg->mg_len = arg * sizeof(U32);
3808a683
DM		 5187 mg->mg_obj = sv_copy;
5188 mg->mg_flags |= MGf_REFCOUNTED;
a1b95068 5189
bfed75c6 5190 if (unchopnum && repeat)
75f63940 5191 Perl_die(aTHX_ "Repeated format line will never terminate (~~ and @#)");
74e0ddf7
NC		 5192
5193 return mg;
a1b95068
WL		 5194}
5195
5196
5197STATIC bool
5198S_num_overflow(NV value, I32 fldsize, I32 frcsize)
5199{
5200 /* Can value be printed in fldsize chars, using %*.*f ? */
5201 NV pwr = 1;
5202 NV eps = 0.5;
5203 bool res = FALSE;
5204 int intsize = fldsize - (value < 0 ? 1 : 0);
5205
a701009a 5206 if (frcsize & FORM_NUM_POINT)
a1b95068 5207 intsize--;
a701009a 5208 frcsize &= ~(FORM_NUM_POINT|FORM_NUM_BLANK);
a1b95068
WL		 5209 intsize -= frcsize;
5210
5211 while (intsize--) pwr *= 10.0;
5212 while (frcsize--) eps /= 10.0;
5213
5214 if( value >= 0 ){
5215 if (value + eps >= pwr)
5216 res = TRUE;
5217 } else {
5218 if (value - eps <= -pwr)
5219 res = TRUE;
5220 }
5221 return res;
a0d0e21e 5222}
4e35701f 5223
bbed91b5 5224static I32
0bd48802 5225S_run_user_filter(pTHX_ int idx, SV *buf_sv, int maxlen)
bbed91b5 5226{
27da23d5 5227 dVAR;
0bd48802 5228 SV * const datasv = FILTER_DATA(idx);
504618e9 5229 const int filter_has_file = IoLINES(datasv);
ad64d0ec
NC		 5230 SV * const filter_state = MUTABLE_SV(IoTOP_GV(datasv));
5231 SV * const filter_sub = MUTABLE_SV(IoBOTTOM_GV(datasv));
941a98a0 5232 int status = 0;
ec0b63d7 5233 SV *upstream;
941a98a0 5234 STRLEN got_len;
162177c1
Z		 5235 char *got_p = NULL;
5236 char *prune_from = NULL;
34113e50 5237 bool read_from_cache = FALSE;
bb7a0f54
MHM		 5238 STRLEN umaxlen;
5239
7918f24d
NC		 5240 PERL_ARGS_ASSERT_RUN_USER_FILTER;
5241
bb7a0f54
MHM		 5242 assert(maxlen >= 0);
5243 umaxlen = maxlen;
5675696b 5244
bbed91b5
KF		 5245 /* I was having segfault trouble under Linux 2.2.5 after a
5246 parse error occured. (Had to hack around it with a test
13765c85 5247 for PL_parser->error_count == 0.) Solaris doesn't segfault --
bbed91b5
KF		 5248 not sure where the trouble is yet. XXX */
5249
4464f08e
NC		 5250 {
5251 SV *const cache = datasv;
937b367d
NC		 5252 if (SvOK(cache)) {
5253 STRLEN cache_len;
5254 const char *cache_p = SvPV(cache, cache_len);
941a98a0
NC		 5255 STRLEN take = 0;
5256
bb7a0f54 5257 if (umaxlen) {
941a98a0
NC		 5258 /* Running in block mode and we have some cached data already.
5259 */
bb7a0f54 5260 if (cache_len >= umaxlen) {
941a98a0
NC		 5261 /* In fact, so much data we don't even need to call
5262 filter_read. */
bb7a0f54 5263 take = umaxlen;
941a98a0
NC		 5264 }
5265 } else {
10edeb5d
JH		 5266 const char *const first_nl =
5267 (const char *)memchr(cache_p, '\n', cache_len);
941a98a0
NC		 5268 if (first_nl) {
5269 take = first_nl + 1 - cache_p;
5270 }
5271 }
5272 if (take) {
5273 sv_catpvn(buf_sv, cache_p, take);
5274 sv_chop(cache, cache_p + take);
486ec47a 5275 /* Definitely not EOF */
937b367d
NC		 5276 return 1;
5277 }
941a98a0 5278
937b367d 5279 sv_catsv(buf_sv, cache);
bb7a0f54
MHM		 5280 if (umaxlen) {
5281 umaxlen -= cache_len;
941a98a0 5282 }
937b367d 5283 SvOK_off(cache);
34113e50 5284 read_from_cache = TRUE;
937b367d
NC		 5285 }
5286 }
ec0b63d7 5287
34113e50
NC		 5288 /* Filter API says that the filter appends to the contents of the buffer.
5289 Usually the buffer is "", so the details don't matter. But if it's not,
5290 then clearly what it contains is already filtered by this filter, so we
5291 don't want to pass it in a second time.
5292 I'm going to use a mortal in case the upstream filter croaks. */
ec0b63d7
NC		 5293 upstream = ((SvOK(buf_sv) && sv_len(buf_sv)) || SvGMAGICAL(buf_sv))
5294 ? sv_newmortal() : buf_sv;
5295 SvUPGRADE(upstream, SVt_PV);
937b367d 5296
bbed91b5 5297 if (filter_has_file) {
67e70b33 5298 status = FILTER_READ(idx+1, upstream, 0);
bbed91b5
KF		 5299 }
5300
34113e50 5301 if (filter_sub && status >= 0) {
39644a26 5302 dSP;
bbed91b5
KF		 5303 int count;
5304
d343c3ef 5305 ENTER_with_name("call_filter_sub");
55b5114f 5306 SAVE_DEFSV;
bbed91b5
KF		 5307 SAVETMPS;
5308 EXTEND(SP, 2);
5309
414bf5ae 5310 DEFSV_set(upstream);
bbed91b5 5311 PUSHMARK(SP);
6e449a3a 5312 mPUSHi(0);
bbed91b5
KF		 5313 if (filter_state) {
5314 PUSHs(filter_state);
5315 }
5316 PUTBACK;
5317 count = call_sv(filter_sub, G_SCALAR);
5318 SPAGAIN;
5319
5320 if (count > 0) {
5321 SV *out = POPs;
5322 if (SvOK(out)) {
941a98a0 5323 status = SvIV(out);
bbed91b5
KF		 5324 }
5325 }
5326
5327 PUTBACK;
5328 FREETMPS;
d343c3ef 5329 LEAVE_with_name("call_filter_sub");
bbed91b5
KF		 5330 }
5331
941a98a0
NC		 5332 if(SvOK(upstream)) {
5333 got_p = SvPV(upstream, got_len);
bb7a0f54
MHM		 5334 if (umaxlen) {
5335 if (got_len > umaxlen) {
5336 prune_from = got_p + umaxlen;
937b367d 5337 }
941a98a0 5338 } else {
162177c1 5339 char *const first_nl = (char *)memchr(got_p, '\n', got_len);
941a98a0
NC		 5340 if (first_nl && first_nl + 1 < got_p + got_len) {
5341 /* There's a second line here... */
5342 prune_from = first_nl + 1;
937b367d 5343 }
937b367d
NC		 5344 }
5345 }
941a98a0
NC		 5346 if (prune_from) {
5347 /* Oh. Too long. Stuff some in our cache. */
5348 STRLEN cached_len = got_p + got_len - prune_from;
4464f08e 5349 SV *const cache = datasv;
941a98a0 5350
4464f08e 5351 if (SvOK(cache)) {
941a98a0
NC		 5352 /* Cache should be empty. */
5353 assert(!SvCUR(cache));
5354 }
5355
5356 sv_setpvn(cache, prune_from, cached_len);
5357 /* If you ask for block mode, you may well split UTF-8 characters.
5358 "If it breaks, you get to keep both parts"
5359 (Your code is broken if you don't put them back together again
5360 before something notices.) */
5361 if (SvUTF8(upstream)) {
5362 SvUTF8_on(cache);
5363 }
5364 SvCUR_set(upstream, got_len - cached_len);
162177c1 5365 *prune_from = 0;
941a98a0
NC		 5366 /* Can't yet be EOF */
5367 if (status == 0)
5368 status = 1;
5369 }
937b367d 5370
34113e50
NC		 5371 /* If they are at EOF but buf_sv has something in it, then they may never
5372 have touched the SV upstream, so it may be undefined. If we naively
5373 concatenate it then we get a warning about use of uninitialised value.
5374 */
5375 if (upstream != buf_sv && (SvOK(upstream) || SvGMAGICAL(upstream))) {
937b367d
NC		 5376 sv_catsv(buf_sv, upstream);
5377 }
5378
941a98a0 5379 if (status <= 0) {
bbed91b5 5380 IoLINES(datasv) = 0;
bbed91b5
KF		 5381 if (filter_state) {
5382 SvREFCNT_dec(filter_state);
a0714e2c 5383 IoTOP_GV(datasv) = NULL;
bbed91b5
KF		 5384 }
5385 if (filter_sub) {
5386 SvREFCNT_dec(filter_sub);
a0714e2c 5387 IoBOTTOM_GV(datasv) = NULL;
bbed91b5 5388 }
0bd48802 5389 filter_del(S_run_user_filter);
bbed91b5 5390 }
34113e50
NC		 5391 if (status == 0 && read_from_cache) {
5392 /* If we read some data from the cache (and by getting here it implies
5393 that we emptied the cache) then we aren't yet at EOF, and mustn't
5394 report that to our caller. */
5395 return 1;
5396 }
941a98a0 5397 return status;
bbed91b5 5398}
84d4ea48 5399
be4b629d
CN		 5400/* perhaps someone can come up with a better name for
5401 this? it is not really "absolute", per se ... */
cf42f822 5402static bool
5f66b61c 5403S_path_is_absolute(const char *name)
be4b629d 5404{
7918f24d
NC		 5405 PERL_ARGS_ASSERT_PATH_IS_ABSOLUTE;
5406
be4b629d 5407 if (PERL_FILE_IS_ABSOLUTE(name)
3f66cd94 5408#ifdef WIN32
36f064bc
CL		 5409 || (*name == '.' && ((name[1] == '/' ||
5410 (name[1] == '.' && name[2] == '/'))
5411 || (name[1] == '\\' ||
5412 ( name[1] == '.' && name[2] == '\\')))
5413 )
5414#else
be4b629d 5415 || (*name == '.' && (name[1] == '/' ||
0bd48802 5416 (name[1] == '.' && name[2] == '/')))
36f064bc 5417#endif
0bd48802 5418 )
be4b629d
CN		 5419 {
5420 return TRUE;
5421 }
5422 else
5423 return FALSE;
5424}
241d1a3b
NC		 5425
5426/*
5427 * Local variables:
5428 * c-indentation-style: bsd
5429 * c-basic-offset: 4
14d04a33 5430 * indent-tabs-mode: nil
241d1a3b
NC		 5431 * End:
5432 *
14d04a33 5433 * ex: set ts=8 sts=4 sw=4 et:
37442d52 5434 */
Unnamed repository; edit this file 'description' to name the repository.