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enable PERL_SBRK_VIA_MALLOC on OPENSTEP-Mach
[perl5.git] / op.c
CommitLineData
a0d0e21e 1/* op.c
79072805 2 *
9607fc9c 3 * Copyright (c) 1991-1997, Larry Wall
79072805
LW		 4 *
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
7 *
a0d0e21e
LW		 8 */
9
10/*
11 * "You see: Mr. Drogo, he married poor Miss Primula Brandybuck. She was
12 * our Mr. Bilbo's first cousin on the mother's side (her mother being the
13 * youngest of the Old Took's daughters); and Mr. Drogo was his second
14 * cousin. So Mr. Frodo is his first *and* second cousin, once removed
15 * either way, as the saying is, if you follow me." --the Gaffer
79072805
LW		 16 */
17
18#include "EXTERN.h"
19#include "perl.h"
20
76e3520e
GS		 21#ifdef PERL_OBJECT
22#define CHECKCALL this->*check
23#else
24#define CHECKCALL *check
25#endif
26
e50aee73 27/*
5dc0d613 28 * In the following definition, the ", Nullop" is just to make the compiler
a5f75d66 29 * think the expression is of the right type: croak actually does a Siglongjmp.
e50aee73 30 */
11343788 31#define CHECKOP(type,o) \
3280af22 32 ((PL_op_mask && PL_op_mask[type]) \
5dc0d613 33 ? ( op_free((OP*)o), \
28757baa 34 croak("%s trapped by operation mask", op_desc[type]), \
35 Nullop ) \
76e3520e 36 : (CHECKCALL[type])((OP*)o))
e50aee73 37
76e3520e
GS		 38static bool scalar_mod_type _((OP *o, I32 type));
39#ifndef PERL_OBJECT
11343788 40static I32 list_assignment _((OP *o));
3bc5dc61 41static void bad_type _((I32 n, char *t, char *name, OP *kid));
11343788
MB		 42static OP *modkids _((OP *o, I32 type));
43static OP *no_fh_allowed _((OP *o));
44static OP *scalarboolean _((OP *o));
45static OP *too_few_arguments _((OP *o, char* name));
46static OP *too_many_arguments _((OP *o, char* name));
47static void null _((OP* o));
bbce6d69 48static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq,
748a9306 49 CV* startcv, I32 cx_ix));
54b9620d 50static OP *newDEFSVOP _((void));
883ffac3 51static OP *new_logop _((I32 type, I32 flags, OP **firstp, OP **otherp));
76e3520e 52#endif
79072805 53
76e3520e 54STATIC char*
8ac85365 55gv_ename(GV *gv)
4633a7c4
LW		 56{
57 SV* tmpsv = sv_newmortal();
46fc3d4c 58 gv_efullname3(tmpsv, gv, Nullch);
3280af22 59 return SvPV(tmpsv,PL_na);
4633a7c4
LW		 60}
61
76e3520e 62STATIC OP *
8ac85365 63no_fh_allowed(OP *o)
79072805 64{
46fc3d4c 65 yyerror(form("Missing comma after first argument to %s function",
5196be3e 66 op_desc[o->op_type]));
11343788 67 return o;
79072805
LW		 68}
69
76e3520e 70STATIC OP *
8ac85365 71too_few_arguments(OP *o, char *name)
79072805 72{
46fc3d4c 73 yyerror(form("Not enough arguments for %s", name));
11343788 74 return o;
79072805
LW		 75}
76
76e3520e 77STATIC OP *
8ac85365 78too_many_arguments(OP *o, char *name)
79072805 79{
46fc3d4c 80 yyerror(form("Too many arguments for %s", name));
11343788 81 return o;
79072805
LW		 82}
83
76e3520e 84STATIC void
8ac85365 85bad_type(I32 n, char *t, char *name, OP *kid)
8990e307 86{
46fc3d4c 87 yyerror(form("Type of arg %d to %s must be %s (not %s)",
88 (int)n, name, t, op_desc[kid->op_type]));
8990e307
LW		 89}
90
a0d0e21e 91void
8ac85365 92assertref(OP *o)
a0d0e21e 93{
11343788 94 int type = o->op_type;
136254bc 95 if (type != OP_AELEM && type != OP_HELEM && type != OP_GELEM) {
46fc3d4c 96 yyerror(form("Can't use subscript on %s", op_desc[type]));
bde90e66 97 if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV) {
9c82454c 98 dTHR;
bde90e66
HS		 99 SV *msg = sv_2mortal(
100 newSVpvf("(Did you mean $ or @ instead of %c?)\n",
101 type == OP_ENTERSUB ? '&' : '%'));
3280af22 102 if (PL_in_eval & 2)
bde90e66 103 warn("%_", msg);
3280af22
NIS		 104 else if (PL_in_eval)
105 sv_catsv(GvSV(PL_errgv), msg);
bde90e66
HS		 106 else
107 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
108 }
a0d0e21e
LW		 109 }
110}
111
79072805
LW		 112/* "register" allocation */
113
114PADOFFSET
8ac85365 115pad_allocmy(char *name)
93a17b20 116{
11343788 117 dTHR;
a0d0e21e
LW		 118 PADOFFSET off;
119 SV *sv;
120
121 if (!(isALPHA(name[1]) || name[1] == '_' && (int)strlen(name) > 2)) {
46fc3d4c 122 if (!isPRINT(name[1])) {
123 name[3] = '\0';
124 name[2] = toCTRL(name[1]);
125 name[1] = '^';
126 }
a0d0e21e
LW		 127 croak("Can't use global %s in \"my\"",name);
128 }
599cee73 129 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 130 SV **svp = AvARRAY(PL_comppad_name);
131 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 132 if ((sv = svp[off])
3280af22 133 && sv != &PL_sv_undef
b1cb66bf 134 && SvIVX(sv) == 999999999 /* var is in open scope */
135 && strEQ(name, SvPVX(sv)))
136 {
599cee73
PM		 137 warner(WARN_UNSAFE,
138 "\"my\" variable %s masks earlier declaration in same scope",
139 name);
b1cb66bf 140 break;
141 }
142 }
143 }
a0d0e21e
LW		 144 off = pad_alloc(OP_PADSV, SVs_PADMY);
145 sv = NEWSV(1102,0);
93a17b20
LW		 146 sv_upgrade(sv, SVt_PVNV);
147 sv_setpv(sv, name);
3280af22 148 if (PL_in_my_stash) {
c750a3ec
MB		 149 if (*name != '$')
150 croak("Can't declare class for non-scalar %s in \"my\"",name);
151 SvOBJECT_on(sv);
152 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 153 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
154 PL_sv_objcount++;
c750a3ec 155 }
3280af22 156 av_store(PL_comppad_name, off, sv);
748a9306 157 SvNVX(sv) = (double)999999999;
8990e307 158 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 159 if (!PL_min_intro_pending)
160 PL_min_intro_pending = off;
161 PL_max_intro_pending = off;
93a17b20 162 if (*name == '@')
3280af22 163 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 164 else if (*name == '%')
3280af22
NIS		 165 av_store(PL_comppad, off, (SV*)newHV());
166 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 167 return off;
168}
169
76e3520e 170STATIC PADOFFSET
bbce6d69 171pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix)
93a17b20 172{
11343788 173 dTHR;
748a9306 174 CV *cv;
93a17b20
LW		 175 I32 off;
176 SV *sv;
93a17b20 177 register I32 i;
c09156bb 178 register PERL_CONTEXT *cx;
a0d0e21e 179 int saweval;
93a17b20 180
748a9306 181 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 182 AV *curlist = CvPADLIST(cv);
183 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 184 AV *curname;
4fdae800 185
3280af22 186 if (!svp || *svp == &PL_sv_undef)
4633a7c4 187 continue;
748a9306
LW		 188 curname = (AV*)*svp;
189 svp = AvARRAY(curname);
93965878 190 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 191 if ((sv = svp[off]) &&
3280af22 192 sv != &PL_sv_undef &&
748a9306 193 seq <= SvIVX(sv) &&
13826f2c 194 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 195 strEQ(SvPVX(sv), name))
196 {
5f05dabc 197 I32 depth;
198 AV *oldpad;
199 SV *oldsv;
200
201 depth = CvDEPTH(cv);
202 if (!depth) {
9607fc9c 203 if (newoff) {
204 if (SvFAKE(sv))
205 continue;
4fdae800 206 return 0; /* don't clone from inactive stack frame */
9607fc9c 207 }
5f05dabc 208 depth = 1;
209 }
210 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
211 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 212 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 213 SV *namesv = NEWSV(1103,0);
748a9306 214 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 215 sv_upgrade(namesv, SVt_PVNV);
216 sv_setpv(namesv, name);
3280af22
NIS		 217 av_store(PL_comppad_name, newoff, namesv);
218 SvNVX(namesv) = (double)PL_curcop->cop_seq;
9607fc9c 219 SvIVX(namesv) = 999999999; /* A ref, intro immediately */
220 SvFAKE_on(namesv); /* A ref, not a real var */
3280af22 221 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 222 /* "It's closures all the way down." */
3280af22 223 CvCLONE_on(PL_compcv);
54310121 224 if (cv == startcv) {
3280af22 225 if (CvANON(PL_compcv))
54310121 226 oldsv = Nullsv; /* no need to keep ref */
227 }
228 else {
28757baa 229 CV *bcv;
230 for (bcv = startcv;
231 bcv && bcv != cv && !CvCLONE(bcv);
232 bcv = CvOUTSIDE(bcv)) {
233 if (CvANON(bcv))
234 CvCLONE_on(bcv);
235 else {
599cee73
PM		 236 if (ckWARN(WARN_CLOSURE) && !CvUNIQUE(cv))
237 warner(WARN_CLOSURE,
44a8e56a 238 "Variable \"%s\" may be unavailable",
28757baa 239 name);
240 break;
241 }
242 }
243 }
244 }
3280af22 245 else if (!CvUNIQUE(PL_compcv)) {
599cee73
PM		 246 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
247 warner(WARN_CLOSURE,
248 "Variable \"%s\" will not stay shared", name);
5f05dabc 249 }
748a9306 250 }
3280af22 251 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 252 return newoff;
253 }
93a17b20
LW		 254 }
255 }
256
257 /* Nothing in current lexical context--try eval's context, if any.
258 * This is necessary to let the perldb get at lexically scoped variables.
259 * XXX This will also probably interact badly with eval tree caching.
260 */
261
a0d0e21e 262 saweval = 0;
748a9306 263 for (i = cx_ix; i >= 0; i--) {
93a17b20
LW		 264 cx = &cxstack[i];
265 switch (cx->cx_type) {
266 default:
748a9306
LW		 267 if (i == 0 && saweval) {
268 seq = cxstack[saweval].blk_oldcop->cop_seq;
3280af22 269 return pad_findlex(name, newoff, seq, PL_main_cv, 0);
748a9306 270 }
93a17b20
LW		 271 break;
272 case CXt_EVAL:
44a8e56a 273 switch (cx->blk_eval.old_op_type) {
274 case OP_ENTEREVAL:
275 saweval = i;
276 break;
277 case OP_REQUIRE:
278 /* require must have its own scope */
279 return 0;
280 }
93a17b20
LW		 281 break;
282 case CXt_SUB:
283 if (!saweval)
284 return 0;
285 cv = cx->blk_sub.cv;
3280af22 286 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 287 saweval = i; /* so we know where we were called from */
93a17b20 288 continue;
93a17b20 289 }
748a9306
LW		 290 seq = cxstack[saweval].blk_oldcop->cop_seq;
291 return pad_findlex(name, newoff, seq, cv, i-1);
93a17b20
LW		 292 }
293 }
294
748a9306
LW		 295 return 0;
296}
a0d0e21e 297
748a9306 298PADOFFSET
8ac85365 299pad_findmy(char *name)
748a9306 300{
11343788 301 dTHR;
748a9306 302 I32 off;
54310121 303 I32 pendoff = 0;
748a9306 304 SV *sv;
3280af22
NIS		 305 SV **svp = AvARRAY(PL_comppad_name);
306 U32 seq = PL_cop_seqmax;
748a9306 307
11343788
MB		 308#ifdef USE_THREADS
309 /*
310 * Special case to get lexical (and hence per-thread) @_.
311 * XXX I need to find out how to tell at parse-time whether use
312 * of @_ should refer to a lexical (from a sub) or defgv (global
313 * scope and maybe weird sub-ish things like formats). See
314 * startsub in perly.y. It's possible that @_ could be lexical
315 * (at least from subs) even in non-threaded perl.
316 */
317 if (strEQ(name, "@_"))
318 return 0; /* success. (NOT_IN_PAD indicates failure) */
319#endif /* USE_THREADS */
320
748a9306 321 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 322 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 323 if ((sv = svp[off]) &&
3280af22 324 sv != &PL_sv_undef &&
54310121 325 (!SvIVX(sv) ||
326 (seq <= SvIVX(sv) &&
327 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 328 strEQ(SvPVX(sv), name))
329 {
54310121 330 if (SvIVX(sv))
331 return (PADOFFSET)off;
332 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 333 }
334 }
748a9306
LW		 335
336 /* See if it's in a nested scope */
3280af22 337 off = pad_findlex(name, 0, seq, CvOUTSIDE(PL_compcv), cxstack_ix);
54310121 338 if (off) {
339 /* If there is a pending local definition, this new alias must die */
340 if (pendoff)
3280af22 341 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 342 return off; /* pad_findlex returns 0 for failure...*/
54310121 343 }
11343788 344 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 345}
346
347void
8ac85365 348pad_leavemy(I32 fill)
93a17b20
LW		 349{
350 I32 off;
3280af22 351 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 352 SV *sv;
3280af22
NIS		 353 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
354 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
355 if ((sv = svp[off]) && sv != &PL_sv_undef)
8990e307
LW		 356 warn("%s never introduced", SvPVX(sv));
357 }
358 }
359 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22
NIS		 360 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
361 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == 999999999)
362 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 363 }
364}
365
366PADOFFSET
8ac85365 367pad_alloc(I32 optype, U32 tmptype)
79072805 368{
11343788 369 dTHR;
79072805
LW		 370 SV *sv;
371 I32 retval;
372
3280af22 373 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 374 croak("panic: pad_alloc");
3280af22 375 if (PL_pad_reset_pending)
a0d0e21e 376 pad_reset();
ed6116ce 377 if (tmptype & SVs_PADMY) {
79072805 378 do {
3280af22 379 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 380 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 381 retval = AvFILLp(PL_comppad);
79072805
LW		 382 }
383 else {
3280af22
NIS		 384 SV **names = AvARRAY(PL_comppad_name);
385 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 386 for (;;) {
387 /*
388 * "foreach" index vars temporarily become aliases to non-"my"
389 * values. Thus we must skip, not just pad values that are
390 * marked as current pad values, but also those with names.
391 */
3280af22
NIS		 392 if (++PL_padix <= names_fill &&
393 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 394 continue;
3280af22 395 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
bbce6d69 396 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
397 break;
398 }
3280af22 399 retval = PL_padix;
79072805 400 }
8990e307 401 SvFLAGS(sv) |= tmptype;
3280af22 402 PL_curpad = AvARRAY(PL_comppad);
11343788 403#ifdef USE_THREADS
5dc0d613 404 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
533c011a 405 (unsigned long) thr, (unsigned long) PL_curpad,
5dc0d613 406 (long) retval, op_name[optype]));
11343788 407#else
d9bb4600 408 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
3280af22 409 (unsigned long) PL_curpad,
5dc0d613 410 (long) retval, op_name[optype]));
11343788 411#endif /* USE_THREADS */
79072805
LW		 412 return (PADOFFSET)retval;
413}
414
415SV *
8990e307 416pad_sv(PADOFFSET po)
79072805 417{
11343788
MB		 418 dTHR;
419#ifdef USE_THREADS
5dc0d613 420 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
533c011a 421 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 422#else
79072805 423 if (!po)
463ee0b2 424 croak("panic: pad_sv po");
d9bb4600 425 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
3280af22 426 (unsigned long) PL_curpad, po));
11343788 427#endif /* USE_THREADS */
3280af22 428 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 429}
430
431void
8990e307 432pad_free(PADOFFSET po)
79072805 433{
11343788 434 dTHR;
3280af22 435 if (!PL_curpad)
a0d0e21e 436 return;
3280af22 437 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 438 croak("panic: pad_free curpad");
79072805 439 if (!po)
463ee0b2 440 croak("panic: pad_free po");
11343788 441#ifdef USE_THREADS
5dc0d613 442 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
533c011a 443 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 444#else
d9bb4600 445 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
3280af22 446 (unsigned long) PL_curpad, po));
11343788 447#endif /* USE_THREADS */
3280af22
NIS		 448 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
449 SvPADTMP_off(PL_curpad[po]);
450 if ((I32)po < PL_padix)
451 PL_padix = po - 1;
79072805
LW		 452}
453
454void
8990e307 455pad_swipe(PADOFFSET po)
79072805 456{
11343788 457 dTHR;
3280af22 458 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 459 croak("panic: pad_swipe curpad");
79072805 460 if (!po)
463ee0b2 461 croak("panic: pad_swipe po");
11343788 462#ifdef USE_THREADS
5dc0d613 463 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
533c011a 464 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 465#else
d9bb4600 466 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
3280af22 467 (unsigned long) PL_curpad, po));
11343788 468#endif /* USE_THREADS */
3280af22
NIS		 469 SvPADTMP_off(PL_curpad[po]);
470 PL_curpad[po] = NEWSV(1107,0);
471 SvPADTMP_on(PL_curpad[po]);
472 if ((I32)po < PL_padix)
473 PL_padix = po - 1;
79072805
LW		 474}
475
d9bb4600
GS		 476/* XXX pad_reset() is currently disabled because it results in serious bugs.
477 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
478 * on the stack by OPs that use them, there are several ways to get an alias
479 * to a shared TARG. Such an alias will change randomly and unpredictably.
480 * We avoid doing this until we can think of a Better Way.
481 * GSAR 97-10-29 */
79072805 482void
8ac85365 483pad_reset(void)
79072805 484{
d9bb4600 485#ifdef USE_BROKEN_PAD_RESET
11343788 486 dTHR;
79072805
LW		 487 register I32 po;
488
6b88bc9c 489 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 490 croak("panic: pad_reset curpad");
11343788 491#ifdef USE_THREADS
5dc0d613 492 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
6b88bc9c 493 (unsigned long) thr, (unsigned long) PL_curpad));
11343788 494#else
d9bb4600 495 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
6b88bc9c 496 (unsigned long) PL_curpad));
11343788 497#endif /* USE_THREADS */
6b88bc9c
GS		 498 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
499 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
500 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
501 SvPADTMP_off(PL_curpad[po]);
748a9306 502 }
6b88bc9c 503 PL_padix = PL_padix_floor;
79072805 504 }
d9bb4600 505#endif
3280af22 506 PL_pad_reset_pending = FALSE;
79072805
LW		 507}
508
a863c7d1 509#ifdef USE_THREADS
54b9620d 510/* find_threadsv is not reentrant */
a863c7d1 511PADOFFSET
54b9620d 512find_threadsv(char *name)
a863c7d1
MB		 513{
514 dTHR;
515 char *p;
516 PADOFFSET key;
554b3eca 517 SV **svp;
54b9620d 518 /* We currently only handle names of a single character */
533c011a 519 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 520 if (!p)
521 return NOT_IN_PAD;
533c011a 522 key = p - PL_threadsv_names;
54b9620d 523 svp = av_fetch(thr->threadsv, key, FALSE);
554b3eca
MB		 524 if (!svp) {
525 SV *sv = NEWSV(0, 0);
54b9620d 526 av_store(thr->threadsv, key, sv);
940cb80d 527 thr->threadsvp = AvARRAY(thr->threadsv);
554b3eca
MB		 528 /*
529 * Some magic variables used to be automagically initialised
530 * in gv_fetchpv. Those which are now per-thread magicals get
531 * initialised here instead.
532 */
533 switch (*name) {
54b9620d
MB		 534 case '_':
535 break;
554b3eca
MB		 536 case ';':
537 sv_setpv(sv, "\034");
54b9620d 538 sv_magic(sv, 0, 0, name, 1);
554b3eca 539 break;
c277df42
IZ		 540 case '&':
541 case '`':
542 case '\'':
533c011a 543 PL_sawampersand = TRUE;
c277df42 544 SvREADONLY_on(sv);
d8b5173a 545 /* FALL THROUGH */
067391ea
GS		 546
547 /* XXX %! tied to Errno.pm needs to be added here.
548 * See gv_fetchpv(). */
549 /* case '!': */
550
54b9620d
MB		 551 default:
552 sv_magic(sv, 0, 0, name, 1);
554b3eca 553 }
8b73bbec 554 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 555 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 556 sv, (*name < 32) ? "^" : "",
557 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 558 }
559 return key;
560}
561#endif /* USE_THREADS */
562
79072805
LW		 563/* Destructor */
564
565void
8ac85365 566op_free(OP *o)
79072805 567{
85e6fe83 568 register OP *kid, *nextkid;
79072805 569
5dc0d613 570 if (!o || o->op_seq == (U16)-1)
79072805
LW		 571 return;
572
11343788
MB		 573 if (o->op_flags & OPf_KIDS) {
574 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 575 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 576 op_free(kid);
85e6fe83 577 }
79072805
LW		 578 }
579
11343788 580 switch (o->op_type) {
8990e307 581 case OP_NULL:
11343788 582 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 583 break;
a0d0e21e 584 case OP_ENTEREVAL:
11343788 585 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 586 break;
554b3eca 587#ifdef USE_THREADS
8dd3ba40
SM		 588 case OP_ENTERITER:
589 if (!(o->op_flags & OPf_SPECIAL))
590 break;
591 /* FALL THROUGH */
2faa37cc 592 case OP_THREADSV:
54b9620d 593 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 594 break;
595#endif /* USE_THREADS */
a6006777 596 default:
ac4c12e7
GS		 597 if (!(o->op_flags & OPf_REF)
598 || (check[o->op_type] != FUNC_NAME_TO_PTR(ck_ftst)))
a6006777 599 break;
600 /* FALL THROUGH */
463ee0b2 601 case OP_GVSV:
79072805 602 case OP_GV:
a6006777 603 case OP_AELEMFAST:
11343788 604 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 605 break;
606 case OP_NEXTSTATE:
607 case OP_DBSTATE:
5196be3e 608 Safefree(cCOPo->cop_label);
11343788 609 SvREFCNT_dec(cCOPo->cop_filegv);
599cee73
PM		 610 if (cCOPo->cop_warnings != WARN_NONE && cCOPo->cop_warnings != WARN_ALL)
611 SvREFCNT_dec(cCOPo->cop_warnings);
79072805
LW		 612 break;
613 case OP_CONST:
11343788 614 SvREFCNT_dec(cSVOPo->op_sv);
79072805 615 break;
748a9306
LW		 616 case OP_GOTO:
617 case OP_NEXT:
618 case OP_LAST:
619 case OP_REDO:
11343788 620 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 621 break;
622 /* FALL THROUGH */
a0d0e21e 623 case OP_TRANS:
a0ed51b3
LW		 624 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
625 SvREFCNT_dec(cSVOPo->op_sv);
626 else
627 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 628 break;
629 case OP_SUBST:
11343788 630 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 631 /* FALL THROUGH */
748a9306 632 case OP_PUSHRE:
a0d0e21e 633 case OP_MATCH:
8782bef2 634 case OP_QR:
c277df42 635 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 636 break;
79072805
LW		 637 }
638
11343788
MB		 639 if (o->op_targ > 0)
640 pad_free(o->op_targ);
8990e307 641
11343788 642 Safefree(o);
79072805
LW		 643}
644
76e3520e 645STATIC void
8ac85365 646null(OP *o)
8990e307 647{
54b9620d 648 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 649 pad_free(o->op_targ);
650 o->op_targ = o->op_type;
651 o->op_type = OP_NULL;
652 o->op_ppaddr = ppaddr[OP_NULL];
8990e307
LW		 653}
654
79072805
LW		 655/* Contextualizers */
656
463ee0b2 657#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 658
659OP *
8ac85365 660linklist(OP *o)
79072805
LW		 661{
662 register OP *kid;
663
11343788
MB		 664 if (o->op_next)
665 return o->op_next;
79072805
LW		 666
667 /* establish postfix order */
11343788
MB		 668 if (cUNOPo->op_first) {
669 o->op_next = LINKLIST(cUNOPo->op_first);
670 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 671 if (kid->op_sibling)
672 kid->op_next = LINKLIST(kid->op_sibling);
673 else
11343788 674 kid->op_next = o;
79072805
LW		 675 }
676 }
677 else
11343788 678 o->op_next = o;
79072805 679
11343788 680 return o->op_next;
79072805
LW		 681}
682
683OP *
8ac85365 684scalarkids(OP *o)
79072805
LW		 685{
686 OP *kid;
11343788
MB		 687 if (o && o->op_flags & OPf_KIDS) {
688 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 689 scalar(kid);
690 }
11343788 691 return o;
79072805
LW		 692}
693
76e3520e 694STATIC OP *
8ac85365 695scalarboolean(OP *o)
8990e307 696{
d008e5eb 697 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 698 dTHR;
d008e5eb
GS		 699 if (ckWARN(WARN_SYNTAX)) {
700 line_t oldline = PL_curcop->cop_line;
a0d0e21e 701
d008e5eb
GS		 702 if (PL_copline != NOLINE)
703 PL_curcop->cop_line = PL_copline;
704 warner(WARN_SYNTAX, "Found = in conditional, should be ==");
705 PL_curcop->cop_line = oldline;
706 }
a0d0e21e 707 }
11343788 708 return scalar(o);
8990e307
LW		 709}
710
711OP *
8ac85365 712scalar(OP *o)
79072805
LW		 713{
714 OP *kid;
715
a0d0e21e 716 /* assumes no premature commitment */
3280af22 717 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 718 || o->op_type == OP_RETURN)
11343788 719 return o;
79072805 720
5dc0d613 721 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 722
11343788 723 switch (o->op_type) {
79072805 724 case OP_REPEAT:
11343788
MB		 725 if (o->op_private & OPpREPEAT_DOLIST)
726 null(((LISTOP*)cBINOPo->op_first)->op_first);
727 scalar(cBINOPo->op_first);
8990e307 728 break;
79072805
LW		 729 case OP_OR:
730 case OP_AND:
731 case OP_COND_EXPR:
11343788 732 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 733 scalar(kid);
79072805 734 break;
a0d0e21e 735 case OP_SPLIT:
11343788 736 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 737 if (!kPMOP->op_pmreplroot)
738 deprecate("implicit split to @_");
739 }
740 /* FALL THROUGH */
79072805 741 case OP_MATCH:
8782bef2 742 case OP_QR:
79072805
LW		 743 case OP_SUBST:
744 case OP_NULL:
8990e307 745 default:
11343788
MB		 746 if (o->op_flags & OPf_KIDS) {
747 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 748 scalar(kid);
749 }
79072805
LW		 750 break;
751 case OP_LEAVE:
752 case OP_LEAVETRY:
5dc0d613 753 kid = cLISTOPo->op_first;
54310121 754 scalar(kid);
755 while (kid = kid->op_sibling) {
756 if (kid->op_sibling)
757 scalarvoid(kid);
758 else
759 scalar(kid);
760 }
3280af22 761 WITH_THR(PL_curcop = &PL_compiling);
54310121 762 break;
748a9306 763 case OP_SCOPE:
79072805 764 case OP_LINESEQ:
8990e307 765 case OP_LIST:
11343788 766 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 767 if (kid->op_sibling)
768 scalarvoid(kid);
769 else
770 scalar(kid);
771 }
3280af22 772 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 773 break;
774 }
11343788 775 return o;
79072805
LW		 776}
777
778OP *
8ac85365 779scalarvoid(OP *o)
79072805
LW		 780{
781 OP *kid;
8990e307
LW		 782 char* useless = 0;
783 SV* sv;
79072805 784
54310121 785 /* assumes no premature commitment */
3280af22 786 if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || PL_error_count
5dc0d613 787 || o->op_type == OP_RETURN)
11343788 788 return o;
79072805 789
5dc0d613 790 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 791
11343788 792 switch (o->op_type) {
79072805 793 default:
11343788 794 if (!(opargs[o->op_type] & OA_FOLDCONST))
8990e307 795 break;
36477c24 796 /* FALL THROUGH */
797 case OP_REPEAT:
11343788 798 if (o->op_flags & OPf_STACKED)
8990e307 799 break;
5d82c453
GA		 800 goto func_ops;
801 case OP_SUBSTR:
802 if (o->op_private == 4)
803 break;
8990e307
LW		 804 /* FALL THROUGH */
805 case OP_GVSV:
806 case OP_WANTARRAY:
807 case OP_GV:
808 case OP_PADSV:
809 case OP_PADAV:
810 case OP_PADHV:
811 case OP_PADANY:
812 case OP_AV2ARYLEN:
8990e307 813 case OP_REF:
a0d0e21e
LW		 814 case OP_REFGEN:
815 case OP_SREFGEN:
8990e307
LW		 816 case OP_DEFINED:
817 case OP_HEX:
818 case OP_OCT:
819 case OP_LENGTH:
8990e307
LW		 820 case OP_VEC:
821 case OP_INDEX:
822 case OP_RINDEX:
823 case OP_SPRINTF:
824 case OP_AELEM:
825 case OP_AELEMFAST:
826 case OP_ASLICE:
8990e307
LW		 827 case OP_HELEM:
828 case OP_HSLICE:
829 case OP_UNPACK:
830 case OP_PACK:
8990e307
LW		 831 case OP_JOIN:
832 case OP_LSLICE:
833 case OP_ANONLIST:
834 case OP_ANONHASH:
835 case OP_SORT:
836 case OP_REVERSE:
837 case OP_RANGE:
838 case OP_FLIP:
839 case OP_FLOP:
840 case OP_CALLER:
841 case OP_FILENO:
842 case OP_EOF:
843 case OP_TELL:
844 case OP_GETSOCKNAME:
845 case OP_GETPEERNAME:
846 case OP_READLINK:
847 case OP_TELLDIR:
848 case OP_GETPPID:
849 case OP_GETPGRP:
850 case OP_GETPRIORITY:
851 case OP_TIME:
852 case OP_TMS:
853 case OP_LOCALTIME:
854 case OP_GMTIME:
855 case OP_GHBYNAME:
856 case OP_GHBYADDR:
857 case OP_GHOSTENT:
858 case OP_GNBYNAME:
859 case OP_GNBYADDR:
860 case OP_GNETENT:
861 case OP_GPBYNAME:
862 case OP_GPBYNUMBER:
863 case OP_GPROTOENT:
864 case OP_GSBYNAME:
865 case OP_GSBYPORT:
866 case OP_GSERVENT:
867 case OP_GPWNAM:
868 case OP_GPWUID:
869 case OP_GGRNAM:
870 case OP_GGRGID:
871 case OP_GETLOGIN:
5d82c453 872 func_ops:
11343788
MB		 873 if (!(o->op_private & OPpLVAL_INTRO))
874 useless = op_desc[o->op_type];
8990e307
LW		 875 break;
876
877 case OP_RV2GV:
878 case OP_RV2SV:
879 case OP_RV2AV:
880 case OP_RV2HV:
11343788
MB		 881 if (!(o->op_private & OPpLVAL_INTRO) &&
882 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 883 useless = "a variable";
884 break;
79072805 885
93a17b20 886 case OP_NEXTSTATE:
8990e307 887 case OP_DBSTATE:
3280af22 888 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 889 break;
890
79072805 891 case OP_CONST:
11343788 892 sv = cSVOPo->op_sv;
d008e5eb
GS		 893 {
894 dTHR;
895 if (ckWARN(WARN_VOID)) {
896 useless = "a constant";
897 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
898 useless = 0;
899 else if (SvPOK(sv)) {
900 if (strnEQ(SvPVX(sv), "di", 2) ||
901 strnEQ(SvPVX(sv), "ds", 2) ||
902 strnEQ(SvPVX(sv), "ig", 2))
903 useless = 0;
904 }
8990e307
LW		 905 }
906 }
11343788 907 null(o); /* don't execute a constant */
8990e307 908 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 909 break;
910
911 case OP_POSTINC:
11343788
MB		 912 o->op_type = OP_PREINC; /* pre-increment is faster */
913 o->op_ppaddr = ppaddr[OP_PREINC];
79072805
LW		 914 break;
915
916 case OP_POSTDEC:
11343788
MB		 917 o->op_type = OP_PREDEC; /* pre-decrement is faster */
918 o->op_ppaddr = ppaddr[OP_PREDEC];
79072805
LW		 919 break;
920
79072805
LW		 921 case OP_OR:
922 case OP_AND:
923 case OP_COND_EXPR:
11343788 924 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 925 scalarvoid(kid);
926 break;
5aabfad6 927
a0d0e21e 928 case OP_NULL:
11343788 929 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
3280af22 930 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
11343788 931 if (o->op_flags & OPf_STACKED)
a0d0e21e 932 break;
5aabfad6 933 /* FALL THROUGH */
79072805
LW		 934 case OP_ENTERTRY:
935 case OP_ENTER:
936 case OP_SCALAR:
11343788 937 if (!(o->op_flags & OPf_KIDS))
79072805 938 break;
54310121 939 /* FALL THROUGH */
463ee0b2 940 case OP_SCOPE:
79072805
LW		 941 case OP_LEAVE:
942 case OP_LEAVETRY:
a0d0e21e 943 case OP_LEAVELOOP:
79072805 944 case OP_LINESEQ:
79072805 945 case OP_LIST:
11343788 946 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 947 scalarvoid(kid);
948 break;
c90c0ff4 949 case OP_ENTEREVAL:
5196be3e 950 scalarkids(o);
c90c0ff4 951 break;
5aabfad6 952 case OP_REQUIRE:
c90c0ff4 953 /* all requires must return a boolean value */
5196be3e
MB		 954 o->op_flags &= ~OPf_WANT;
955 return scalar(o);
a0d0e21e 956 case OP_SPLIT:
11343788 957 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 958 if (!kPMOP->op_pmreplroot)
959 deprecate("implicit split to @_");
960 }
961 break;
79072805 962 }
d008e5eb
GS		 963 if (useless) {
964 dTHR;
965 if (ckWARN(WARN_VOID))
966 warner(WARN_VOID, "Useless use of %s in void context", useless);
967 }
11343788 968 return o;
79072805
LW		 969}
970
971OP *
8ac85365 972listkids(OP *o)
79072805
LW		 973{
974 OP *kid;
11343788
MB		 975 if (o && o->op_flags & OPf_KIDS) {
976 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 977 list(kid);
978 }
11343788 979 return o;
79072805
LW		 980}
981
982OP *
8ac85365 983list(OP *o)
79072805
LW		 984{
985 OP *kid;
986
a0d0e21e 987 /* assumes no premature commitment */
3280af22 988 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 989 || o->op_type == OP_RETURN)
11343788 990 return o;
79072805 991
5dc0d613 992 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 993
11343788 994 switch (o->op_type) {
79072805
LW		 995 case OP_FLOP:
996 case OP_REPEAT:
11343788 997 list(cBINOPo->op_first);
79072805
LW		 998 break;
999 case OP_OR:
1000 case OP_AND:
1001 case OP_COND_EXPR:
11343788 1002 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1003 list(kid);
1004 break;
1005 default:
1006 case OP_MATCH:
8782bef2 1007 case OP_QR:
79072805
LW		 1008 case OP_SUBST:
1009 case OP_NULL:
11343788 1010 if (!(o->op_flags & OPf_KIDS))
79072805 1011 break;
11343788
MB		 1012 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1013 list(cBINOPo->op_first);
1014 return gen_constant_list(o);
79072805
LW		 1015 }
1016 case OP_LIST:
11343788 1017 listkids(o);
79072805
LW		 1018 break;
1019 case OP_LEAVE:
1020 case OP_LEAVETRY:
5dc0d613 1021 kid = cLISTOPo->op_first;
54310121 1022 list(kid);
1023 while (kid = kid->op_sibling) {
1024 if (kid->op_sibling)
1025 scalarvoid(kid);
1026 else
1027 list(kid);
1028 }
3280af22 1029 WITH_THR(PL_curcop = &PL_compiling);
54310121 1030 break;
748a9306 1031 case OP_SCOPE:
79072805 1032 case OP_LINESEQ:
11343788 1033 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1034 if (kid->op_sibling)
1035 scalarvoid(kid);
1036 else
1037 list(kid);
1038 }
3280af22 1039 WITH_THR(PL_curcop = &PL_compiling);
79072805 1040 break;
c90c0ff4 1041 case OP_REQUIRE:
1042 /* all requires must return a boolean value */
5196be3e
MB		 1043 o->op_flags &= ~OPf_WANT;
1044 return scalar(o);
79072805 1045 }
11343788 1046 return o;
79072805
LW		 1047}
1048
1049OP *
8ac85365 1050scalarseq(OP *o)
79072805
LW		 1051{
1052 OP *kid;
1053
11343788
MB		 1054 if (o) {
1055 if (o->op_type == OP_LINESEQ ||
1056 o->op_type == OP_SCOPE ||
1057 o->op_type == OP_LEAVE ||
1058 o->op_type == OP_LEAVETRY)
463ee0b2 1059 {
0f15f207 1060 dTHR;
11343788 1061 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1062 if (kid->op_sibling) {
463ee0b2 1063 scalarvoid(kid);
ed6116ce 1064 }
463ee0b2 1065 }
3280af22 1066 PL_curcop = &PL_compiling;
79072805 1067 }
11343788 1068 o->op_flags &= ~OPf_PARENS;
3280af22 1069 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1070 o->op_flags |= OPf_PARENS;
79072805 1071 }
8990e307 1072 else
11343788
MB		 1073 o = newOP(OP_STUB, 0);
1074 return o;
79072805
LW		 1075}
1076
76e3520e 1077STATIC OP *
8ac85365 1078modkids(OP *o, I32 type)
79072805
LW		 1079{
1080 OP *kid;
11343788
MB		 1081 if (o && o->op_flags & OPf_KIDS) {
1082 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1083 mod(kid, type);
79072805 1084 }
11343788 1085 return o;
79072805
LW		 1086}
1087
79072805 1088OP *
8ac85365 1089mod(OP *o, I32 type)
79072805 1090{
11343788 1091 dTHR;
79072805
LW		 1092 OP *kid;
1093 SV *sv;
1094
3280af22 1095 if (!o || PL_error_count)
11343788 1096 return o;
79072805 1097
11343788 1098 switch (o->op_type) {
68dc0745 1099 case OP_UNDEF:
3280af22 1100 PL_modcount++;
5dc0d613 1101 return o;
a0d0e21e 1102 case OP_CONST:
11343788 1103 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1104 goto nomod;
3280af22
NIS		 1105 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
1106 PL_compiling.cop_arybase = (I32)SvIV(((SVOP*)PL_eval_start)->op_sv);
1107 PL_eval_start = 0;
a0d0e21e
LW		 1108 }
1109 else if (!type) {
3280af22
NIS		 1110 SAVEI32(PL_compiling.cop_arybase);
1111 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1112 }
1113 else if (type == OP_REFGEN)
1114 goto nomod;
1115 else
1116 croak("That use of $[ is unsupported");
1117 break;
5f05dabc 1118 case OP_STUB:
5196be3e 1119 if (o->op_flags & OPf_PARENS)
5f05dabc 1120 break;
1121 goto nomod;
a0d0e21e
LW		 1122 case OP_ENTERSUB:
1123 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1124 !(o->op_flags & OPf_STACKED)) {
1125 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1126 o->op_ppaddr = ppaddr[OP_RV2CV];
1127 assert(cUNOPo->op_first->op_type == OP_NULL);
1128 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1129 break;
1130 }
1131 /* FALL THROUGH */
1132 default:
a0d0e21e
LW		 1133 nomod:
1134 /* grep, foreach, subcalls, refgen */
1135 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1136 break;
46fc3d4c 1137 yyerror(form("Can't modify %s in %s",
5dc0d613 1138 op_desc[o->op_type],
46fc3d4c 1139 type ? op_desc[type] : "local"));
11343788 1140 return o;
79072805 1141
a0d0e21e
LW		 1142 case OP_PREINC:
1143 case OP_PREDEC:
1144 case OP_POW:
1145 case OP_MULTIPLY:
1146 case OP_DIVIDE:
1147 case OP_MODULO:
1148 case OP_REPEAT:
1149 case OP_ADD:
1150 case OP_SUBTRACT:
1151 case OP_CONCAT:
1152 case OP_LEFT_SHIFT:
1153 case OP_RIGHT_SHIFT:
1154 case OP_BIT_AND:
1155 case OP_BIT_XOR:
1156 case OP_BIT_OR:
1157 case OP_I_MULTIPLY:
1158 case OP_I_DIVIDE:
1159 case OP_I_MODULO:
1160 case OP_I_ADD:
1161 case OP_I_SUBTRACT:
11343788 1162 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1163 goto nomod;
3280af22 1164 PL_modcount++;
a0d0e21e
LW		 1165 break;
1166
79072805 1167 case OP_COND_EXPR:
11343788 1168 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1169 mod(kid, type);
79072805
LW		 1170 break;
1171
1172 case OP_RV2AV:
1173 case OP_RV2HV:
93af7a87 1174 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1175 croak("Can't localize through a reference");
11343788 1176 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1177 PL_modcount = 10000;
11343788 1178 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1179 }
1180 /* FALL THROUGH */
79072805 1181 case OP_RV2GV:
5dc0d613 1182 if (scalar_mod_type(o, type))
3fe9a6f1 1183 goto nomod;
11343788 1184 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1185 /* FALL THROUGH */
1186 case OP_AASSIGN:
1187 case OP_ASLICE:
1188 case OP_HSLICE:
93a17b20
LW		 1189 case OP_NEXTSTATE:
1190 case OP_DBSTATE:
a0d0e21e
LW		 1191 case OP_REFGEN:
1192 case OP_CHOMP:
3280af22 1193 PL_modcount = 10000;
79072805 1194 break;
463ee0b2 1195 case OP_RV2SV:
11343788 1196 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1197 croak("Can't localize through a reference");
aeea060c 1198 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1199 /* FALL THROUGH */
79072805 1200 case OP_GV:
463ee0b2 1201 case OP_AV2ARYLEN:
3280af22 1202 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1203 case OP_SASSIGN:
8990e307 1204 case OP_AELEMFAST:
3280af22 1205 PL_modcount++;
8990e307
LW		 1206 break;
1207
748a9306
LW		 1208 case OP_PADAV:
1209 case OP_PADHV:
3280af22 1210 PL_modcount = 10000;
5196be3e
MB		 1211 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1212 return o; /* Treat \(@foo) like ordinary list. */
1213 if (scalar_mod_type(o, type))
3fe9a6f1 1214 goto nomod;
748a9306
LW		 1215 /* FALL THROUGH */
1216 case OP_PADSV:
3280af22 1217 PL_modcount++;
748a9306
LW		 1218 if (!type)
1219 croak("Can't localize lexical variable %s",
3280af22 1220 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), PL_na));
463ee0b2
LW		 1221 break;
1222
554b3eca 1223#ifdef USE_THREADS
2faa37cc 1224 case OP_THREADSV:
533c011a 1225 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1226 break;
1227#endif /* USE_THREADS */
1228
748a9306
LW		 1229 case OP_PUSHMARK:
1230 break;
a0d0e21e 1231
69969c6f
SB		 1232 case OP_KEYS:
1233 if (type != OP_SASSIGN)
1234 goto nomod;
5d82c453
GA		 1235 goto lvalue_func;
1236 case OP_SUBSTR:
1237 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1238 goto nomod;
5f05dabc 1239 /* FALL THROUGH */
a0d0e21e 1240 case OP_POS:
463ee0b2 1241 case OP_VEC:
5d82c453 1242 lvalue_func:
11343788
MB		 1243 pad_free(o->op_targ);
1244 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1245 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1246 if (o->op_flags & OPf_KIDS)
1247 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1248 break;
a0d0e21e 1249
463ee0b2
LW		 1250 case OP_AELEM:
1251 case OP_HELEM:
11343788 1252 ref(cBINOPo->op_first, o->op_type);
68dc0745 1253 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1254 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1255 o->op_private |= OPpLVAL_DEFER;
3280af22 1256 PL_modcount++;
463ee0b2
LW		 1257 break;
1258
1259 case OP_SCOPE:
1260 case OP_LEAVE:
1261 case OP_ENTER:
11343788
MB		 1262 if (o->op_flags & OPf_KIDS)
1263 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1264 break;
1265
1266 case OP_NULL:
11343788 1267 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1268 break;
11343788
MB		 1269 if (o->op_targ != OP_LIST) {
1270 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1271 break;
1272 }
1273 /* FALL THROUGH */
463ee0b2 1274 case OP_LIST:
11343788 1275 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1276 mod(kid, type);
1277 break;
1278 }
11343788 1279 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1280
1281 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1282 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1283 else if (!type) {
11343788
MB		 1284 o->op_private |= OPpLVAL_INTRO;
1285 o->op_flags &= ~OPf_SPECIAL;
3280af22 1286 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1287 }
a0d0e21e 1288 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1289 o->op_flags |= OPf_REF;
1290 return o;
463ee0b2
LW		 1291}
1292
3fe9a6f1 1293static bool
8ac85365 1294scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1295{
1296 switch (type) {
1297 case OP_SASSIGN:
5196be3e 1298 if (o->op_type == OP_RV2GV)
3fe9a6f1 1299 return FALSE;
1300 /* FALL THROUGH */
1301 case OP_PREINC:
1302 case OP_PREDEC:
1303 case OP_POSTINC:
1304 case OP_POSTDEC:
1305 case OP_I_PREINC:
1306 case OP_I_PREDEC:
1307 case OP_I_POSTINC:
1308 case OP_I_POSTDEC:
1309 case OP_POW:
1310 case OP_MULTIPLY:
1311 case OP_DIVIDE:
1312 case OP_MODULO:
1313 case OP_REPEAT:
1314 case OP_ADD:
1315 case OP_SUBTRACT:
1316 case OP_I_MULTIPLY:
1317 case OP_I_DIVIDE:
1318 case OP_I_MODULO:
1319 case OP_I_ADD:
1320 case OP_I_SUBTRACT:
1321 case OP_LEFT_SHIFT:
1322 case OP_RIGHT_SHIFT:
1323 case OP_BIT_AND:
1324 case OP_BIT_XOR:
1325 case OP_BIT_OR:
1326 case OP_CONCAT:
1327 case OP_SUBST:
1328 case OP_TRANS:
49e9fbe6
GS		 1329 case OP_READ:
1330 case OP_SYSREAD:
1331 case OP_RECV:
3fe9a6f1 1332 case OP_ANDASSIGN: /* may work later */
1333 case OP_ORASSIGN: /* may work later */
1334 return TRUE;
1335 default:
1336 return FALSE;
1337 }
1338}
1339
463ee0b2 1340OP *
8ac85365 1341refkids(OP *o, I32 type)
463ee0b2
LW		 1342{
1343 OP *kid;
11343788
MB		 1344 if (o && o->op_flags & OPf_KIDS) {
1345 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1346 ref(kid, type);
1347 }
11343788 1348 return o;
463ee0b2
LW		 1349}
1350
1351OP *
8ac85365 1352ref(OP *o, I32 type)
463ee0b2
LW		 1353{
1354 OP *kid;
463ee0b2 1355
3280af22 1356 if (!o || PL_error_count)
11343788 1357 return o;
463ee0b2 1358
11343788 1359 switch (o->op_type) {
a0d0e21e 1360 case OP_ENTERSUB:
e55aaa0e 1361 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1362 !(o->op_flags & OPf_STACKED)) {
1363 o->op_type = OP_RV2CV; /* entersub => rv2cv */
1364 o->op_ppaddr = ppaddr[OP_RV2CV];
1365 assert(cUNOPo->op_first->op_type == OP_NULL);
1366 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1367 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1368 }
1369 break;
aeea060c 1370
463ee0b2 1371 case OP_COND_EXPR:
11343788 1372 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1373 ref(kid, type);
1374 break;
8990e307 1375 case OP_RV2SV:
11343788 1376 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1377 /* FALL THROUGH */
1378 case OP_PADSV:
5f05dabc 1379 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1380 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1381 : type == OP_RV2HV ? OPpDEREF_HV
1382 : OPpDEREF_SV);
11343788 1383 o->op_flags |= OPf_MOD;
a0d0e21e 1384 }
8990e307
LW		 1385 break;
1386
2faa37cc 1387 case OP_THREADSV:
a863c7d1
MB		 1388 o->op_flags |= OPf_MOD; /* XXX ??? */
1389 break;
1390
463ee0b2
LW		 1391 case OP_RV2AV:
1392 case OP_RV2HV:
aeea060c 1393 o->op_flags |= OPf_REF;
8990e307 1394 /* FALL THROUGH */
463ee0b2 1395 case OP_RV2GV:
11343788 1396 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1397 break;
8990e307 1398
463ee0b2
LW		 1399 case OP_PADAV:
1400 case OP_PADHV:
aeea060c 1401 o->op_flags |= OPf_REF;
79072805 1402 break;
aeea060c 1403
8990e307 1404 case OP_SCALAR:
79072805 1405 case OP_NULL:
11343788 1406 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1407 break;
11343788 1408 ref(cBINOPo->op_first, type);
79072805
LW		 1409 break;
1410 case OP_AELEM:
1411 case OP_HELEM:
11343788 1412 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1413 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1414 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1415 : type == OP_RV2HV ? OPpDEREF_HV
1416 : OPpDEREF_SV);
11343788 1417 o->op_flags |= OPf_MOD;
8990e307 1418 }
79072805
LW		 1419 break;
1420
463ee0b2 1421 case OP_SCOPE:
79072805
LW		 1422 case OP_LEAVE:
1423 case OP_ENTER:
8990e307 1424 case OP_LIST:
11343788 1425 if (!(o->op_flags & OPf_KIDS))
79072805 1426 break;
11343788 1427 ref(cLISTOPo->op_last, type);
79072805 1428 break;
a0d0e21e
LW		 1429 default:
1430 break;
79072805 1431 }
11343788 1432 return scalar(o);
8990e307 1433
79072805
LW		 1434}
1435
1436OP *
8ac85365 1437my(OP *o)
93a17b20
LW		 1438{
1439 OP *kid;
93a17b20
LW		 1440 I32 type;
1441
3280af22 1442 if (!o || PL_error_count)
11343788 1443 return o;
93a17b20 1444
11343788 1445 type = o->op_type;
93a17b20 1446 if (type == OP_LIST) {
11343788 1447 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20 1448 my(kid);
dab48698 1449 } else if (type == OP_UNDEF) {
7766148a 1450 return o;
dab48698 1451 } else if (type != OP_PADSV &&
93a17b20
LW		 1452 type != OP_PADAV &&
1453 type != OP_PADHV &&
1454 type != OP_PUSHMARK)
1455 {
5dc0d613 1456 yyerror(form("Can't declare %s in my", op_desc[o->op_type]));
11343788 1457 return o;
93a17b20 1458 }
11343788
MB		 1459 o->op_flags |= OPf_MOD;
1460 o->op_private |= OPpLVAL_INTRO;
1461 return o;
93a17b20
LW		 1462}
1463
1464OP *
8ac85365 1465sawparens(OP *o)
79072805
LW		 1466{
1467 if (o)
1468 o->op_flags |= OPf_PARENS;
1469 return o;
1470}
1471
1472OP *
8ac85365 1473bind_match(I32 type, OP *left, OP *right)
79072805 1474{
d008e5eb 1475 dTHR;
11343788 1476 OP *o;
79072805 1477
599cee73
PM		 1478 if (ckWARN(WARN_UNSAFE) &&
1479 (left->op_type == OP_RV2AV ||
1480 left->op_type == OP_RV2HV ||
1481 left->op_type == OP_PADAV ||
1482 left->op_type == OP_PADHV)) {
1483 char *desc = op_desc[(right->op_type == OP_SUBST ||
1484 right->op_type == OP_TRANS)
1485 ? right->op_type : OP_MATCH];
1486 char *sample = ((left->op_type == OP_RV2AV ||
1487 left->op_type == OP_PADAV)
1488 ? "@array" : "%hash");
1489 warner(WARN_UNSAFE,
1490 "Applying %s to %s will act on scalar(%s)",
1491 desc, sample, sample);
2ae324a7 1492 }
1493
79072805
LW		 1494 if (right->op_type == OP_MATCH ||
1495 right->op_type == OP_SUBST ||
1496 right->op_type == OP_TRANS) {
1497 right->op_flags |= OPf_STACKED;
1498 if (right->op_type != OP_MATCH)
463ee0b2 1499 left = mod(left, right->op_type);
79072805 1500 if (right->op_type == OP_TRANS)
11343788 1501 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1502 else
11343788 1503 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1504 if (type == OP_NOT)
11343788
MB		 1505 return newUNOP(OP_NOT, 0, scalar(o));
1506 return o;
79072805
LW		 1507 }
1508 else
1509 return bind_match(type, left,
1510 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1511}
1512
1513OP *
8ac85365 1514invert(OP *o)
79072805 1515{
11343788
MB		 1516 if (!o)
1517 return o;
79072805 1518 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1519 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1520}
1521
1522OP *
8ac85365 1523scope(OP *o)
79072805
LW		 1524{
1525 if (o) {
3280af22 1526 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1527 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1528 o->op_type = OP_LEAVE;
1529 o->op_ppaddr = ppaddr[OP_LEAVE];
1530 }
1531 else {
1532 if (o->op_type == OP_LINESEQ) {
1533 OP *kid;
1534 o->op_type = OP_SCOPE;
1535 o->op_ppaddr = ppaddr[OP_SCOPE];
1536 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1537 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1538 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1539 null(kid);
748a9306 1540 }
463ee0b2
LW		 1541 }
1542 else
748a9306 1543 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1544 }
79072805
LW		 1545 }
1546 return o;
1547}
1548
b3ac6de7
IZ		 1549void
1550save_hints(void)
1551{
3280af22
NIS		 1552 SAVEI32(PL_hints);
1553 SAVESPTR(GvHV(PL_hintgv));
1554 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1555 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1556}
1557
a0d0e21e 1558int
8ac85365 1559block_start(int full)
79072805 1560{
11343788 1561 dTHR;
3280af22 1562 int retval = PL_savestack_ix;
b3ac6de7 1563
3280af22 1564 SAVEI32(PL_comppad_name_floor);
55497cff 1565 if (full) {
3280af22
NIS		 1566 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1567 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1568 else
3280af22
NIS		 1569 PL_comppad_name_floor = 0;
1570 }
1571 SAVEI32(PL_min_intro_pending);
1572 SAVEI32(PL_max_intro_pending);
1573 PL_min_intro_pending = 0;
1574 SAVEI32(PL_comppad_name_fill);
1575 SAVEI32(PL_padix_floor);
1576 PL_padix_floor = PL_padix;
1577 PL_pad_reset_pending = FALSE;
b3ac6de7 1578 SAVEHINTS();
3280af22 1579 PL_hints &= ~HINT_BLOCK_SCOPE;
599cee73
PM		 1580 SAVEPPTR(compiling.cop_warnings);
1581 if (PL_compiling.cop_warnings != WARN_ALL &&
1582 PL_compiling.cop_warnings != WARN_NONE) {
1583 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1584 SAVEFREESV(PL_compiling.cop_warnings) ;
1585 }
1586
1587
a0d0e21e
LW		 1588 return retval;
1589}
1590
1591OP*
8ac85365 1592block_end(I32 floor, OP *seq)
a0d0e21e 1593{
11343788 1594 dTHR;
3280af22 1595 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 1596 OP* retval = scalarseq(seq);
a0d0e21e 1597 LEAVE_SCOPE(floor);
3280af22 1598 PL_pad_reset_pending = FALSE;
a0ed51b3 1599 compiling.op_private = PL_hints;
a0d0e21e 1600 if (needblockscope)
3280af22
NIS		 1601 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
1602 pad_leavemy(PL_comppad_name_fill);
1603 PL_cop_seqmax++;
a0d0e21e
LW		 1604 return retval;
1605}
1606
76e3520e 1607STATIC OP *
54b9620d
MB		 1608newDEFSVOP(void)
1609{
1610#ifdef USE_THREADS
1611 OP *o = newOP(OP_THREADSV, 0);
1612 o->op_targ = find_threadsv("_");
1613 return o;
1614#else
3280af22 1615 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 1616#endif /* USE_THREADS */
1617}
1618
a0d0e21e 1619void
8ac85365 1620newPROG(OP *o)
a0d0e21e 1621{
11343788 1622 dTHR;
3280af22
NIS		 1623 if (PL_in_eval) {
1624 PL_eval_root = newUNOP(OP_LEAVEEVAL, ((PL_in_eval & 4) ? OPf_SPECIAL : 0), o);
1625 PL_eval_start = linklist(PL_eval_root);
1626 PL_eval_root->op_next = 0;
1627 peep(PL_eval_start);
a0d0e21e
LW		 1628 }
1629 else {
5dc0d613 1630 if (!o)
a0d0e21e 1631 return;
3280af22
NIS		 1632 PL_main_root = scope(sawparens(scalarvoid(o)));
1633 PL_curcop = &PL_compiling;
1634 PL_main_start = LINKLIST(PL_main_root);
1635 PL_main_root->op_next = 0;
1636 peep(PL_main_start);
1637 PL_compcv = 0;
3841441e 1638
4fdae800 1639 /* Register with debugger */
84902520 1640 if (PERLDB_INTER) {
3841441e 1641 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1642 if (cv) {
1643 dSP;
924508f0 1644 PUSHMARK(SP);
3280af22 1645 XPUSHs((SV*)PL_compiling.cop_filegv);
3841441e
CS		 1646 PUTBACK;
1647 perl_call_sv((SV*)cv, G_DISCARD);
1648 }
1649 }
79072805 1650 }
79072805
LW		 1651}
1652
1653OP *
8ac85365 1654localize(OP *o, I32 lex)
79072805
LW		 1655{
1656 if (o->op_flags & OPf_PARENS)
1657 list(o);
8990e307 1658 else {
d008e5eb 1659 dTHR;
599cee73 1660 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 1661 char *s;
3280af22 1662 for (s = PL_bufptr; *s && (isALNUM(*s) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1663 if (*s == ';' || *s == '=')
599cee73
PM		 1664 warner(WARN_PARENTHESIS, "Parens missing around \"%s\" list",
1665 lex ? "my" : "local");
8990e307
LW		 1666 }
1667 }
3280af22
NIS		 1668 PL_in_my = FALSE;
1669 PL_in_my_stash = Nullhv;
93a17b20
LW		 1670 if (lex)
1671 return my(o);
1672 else
463ee0b2 1673 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1674}
1675
1676OP *
8ac85365 1677jmaybe(OP *o)
79072805
LW		 1678{
1679 if (o->op_type == OP_LIST) {
554b3eca
MB		 1680 OP *o2;
1681#ifdef USE_THREADS
2faa37cc 1682 o2 = newOP(OP_THREADSV, 0);
54b9620d 1683 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1684#else
1685 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1686#endif /* USE_THREADS */
1687 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1688 }
1689 return o;
1690}
1691
1692OP *
8ac85365 1693fold_constants(register OP *o)
79072805 1694{
11343788 1695 dTHR;
79072805
LW		 1696 register OP *curop;
1697 I32 type = o->op_type;
748a9306 1698 SV *sv;
79072805
LW		 1699
1700 if (opargs[type] & OA_RETSCALAR)
1701 scalar(o);
1702 if (opargs[type] & OA_TARGET)
ed6116ce 1703 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1704
3280af22 1705 if ((opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER))
a0d0e21e 1706 o->op_ppaddr = ppaddr[type = ++(o->op_type)];
85e6fe83 1707
79072805
LW		 1708 if (!(opargs[type] & OA_FOLDCONST))
1709 goto nope;
1710
de939608
CS		 1711 switch (type) {
1712 case OP_SPRINTF:
1713 case OP_UCFIRST:
1714 case OP_LCFIRST:
1715 case OP_UC:
1716 case OP_LC:
69dcf70c
MB		 1717 case OP_SLT:
1718 case OP_SGT:
1719 case OP_SLE:
1720 case OP_SGE:
1721 case OP_SCMP:
1722
de939608
CS		 1723 if (o->op_private & OPpLOCALE)
1724 goto nope;
1725 }
1726
3280af22 1727 if (PL_error_count)
a0d0e21e
LW		 1728 goto nope; /* Don't try to run w/ errors */
1729
79072805 1730 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1731 if (curop->op_type != OP_CONST &&
1732 curop->op_type != OP_LIST &&
1733 curop->op_type != OP_SCALAR &&
a0d0e21e 1734 curop->op_type != OP_NULL &&
93a17b20 1735 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1736 goto nope;
1737 }
1738 }
1739
1740 curop = LINKLIST(o);
1741 o->op_next = 0;
533c011a 1742 PL_op = curop;
76e3520e 1743 CALLRUNOPS();
3280af22 1744 sv = *(PL_stack_sp--);
748a9306 1745 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1746 pad_swipe(o->op_targ);
748a9306
LW		 1747 else if (SvTEMP(sv)) { /* grab mortal temp? */
1748 (void)SvREFCNT_inc(sv);
1749 SvTEMP_off(sv);
85e6fe83 1750 }
79072805
LW		 1751 op_free(o);
1752 if (type == OP_RV2GV)
b1cb66bf 1753 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 1754 else {
ee580363
GS		 1755 /* try to smush double to int, but don't smush -2.0 to -2 */
1756 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
1757 type != OP_NEGATE)
1758 {
748a9306 1759 IV iv = SvIV(sv);
ee580363 1760 if ((double)iv == SvNV(sv)) {
748a9306
LW		 1761 SvREFCNT_dec(sv);
1762 sv = newSViv(iv);
1763 }
b1cb66bf 1764 else
1765 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1766 }
1767 return newSVOP(OP_CONST, 0, sv);
1768 }
aeea060c 1769
79072805
LW		 1770 nope:
1771 if (!(opargs[type] & OA_OTHERINT))
1772 return o;
79072805 1773
3280af22 1774 if (!(PL_hints & HINT_INTEGER)) {
a0d0e21e 1775 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1776 return o;
1777
1778 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1779 if (curop->op_type == OP_CONST) {
b1cb66bf 1780 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1781 continue;
1782 return o;
1783 }
1784 if (opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1785 continue;
1786 return o;
1787 }
a0d0e21e 1788 o->op_ppaddr = ppaddr[++(o->op_type)];
79072805
LW		 1789 }
1790
79072805
LW		 1791 return o;
1792}
1793
1794OP *
8ac85365 1795gen_constant_list(register OP *o)
79072805 1796{
11343788 1797 dTHR;
79072805 1798 register OP *curop;
3280af22 1799 I32 oldtmps_floor = PL_tmps_floor;
79072805 1800
a0d0e21e 1801 list(o);
3280af22 1802 if (PL_error_count)
a0d0e21e
LW		 1803 return o; /* Don't attempt to run with errors */
1804
533c011a 1805 PL_op = curop = LINKLIST(o);
a0d0e21e 1806 o->op_next = 0;
11343788 1807 pp_pushmark(ARGS);
76e3520e 1808 CALLRUNOPS();
533c011a 1809 PL_op = curop;
11343788 1810 pp_anonlist(ARGS);
3280af22 1811 PL_tmps_floor = oldtmps_floor;
79072805
LW		 1812
1813 o->op_type = OP_RV2AV;
1814 o->op_ppaddr = ppaddr[OP_RV2AV];
79072805 1815 curop = ((UNOP*)o)->op_first;
3280af22 1816 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 1817 op_free(curop);
79072805
LW		 1818 linklist(o);
1819 return list(o);
1820}
1821
1822OP *
8ac85365 1823convert(I32 type, I32 flags, OP *o)
79072805
LW		 1824{
1825 OP *kid;
a0d0e21e 1826 OP *last = 0;
79072805 1827
11343788
MB		 1828 if (!o || o->op_type != OP_LIST)
1829 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1830 else
5dc0d613 1831 o->op_flags &= ~OPf_WANT;
79072805 1832
8990e307 1833 if (!(opargs[type] & OA_MARK))
11343788 1834 null(cLISTOPo->op_first);
8990e307 1835
11343788
MB		 1836 o->op_type = type;
1837 o->op_ppaddr = ppaddr[type];
1838 o->op_flags |= flags;
79072805 1839
11343788
MB		 1840 o = CHECKOP(type, o);
1841 if (o->op_type != type)
1842 return o;
79072805 1843
11343788 1844 if (cLISTOPo->op_children < 7) {
79072805 1845 /* XXX do we really need to do this if we're done appending?? */
11343788 1846 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1847 last = kid;
11343788 1848 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1849 }
1850
11343788 1851 return fold_constants(o);
79072805
LW		 1852}
1853
1854/* List constructors */
1855
1856OP *
8ac85365 1857append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1858{
1859 if (!first)
1860 return last;
8990e307
LW		 1861
1862 if (!last)
79072805 1863 return first;
8990e307 1864
a0d0e21e
LW		 1865 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1866 return newLISTOP(type, 0, first, last);
79072805 1867
a0d0e21e
LW		 1868 if (first->op_flags & OPf_KIDS)
1869 ((LISTOP*)first)->op_last->op_sibling = last;
1870 else {
1871 first->op_flags |= OPf_KIDS;
1872 ((LISTOP*)first)->op_first = last;
1873 }
1874 ((LISTOP*)first)->op_last = last;
1875 ((LISTOP*)first)->op_children++;
1876 return first;
79072805
LW		 1877}
1878
1879OP *
8ac85365 1880append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1881{
1882 if (!first)
1883 return (OP*)last;
8990e307
LW		 1884
1885 if (!last)
79072805 1886 return (OP*)first;
8990e307
LW		 1887
1888 if (first->op_type != type)
79072805 1889 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1890
1891 if (last->op_type != type)
79072805
LW		 1892 return append_elem(type, (OP*)first, (OP*)last);
1893
1894 first->op_last->op_sibling = last->op_first;
1895 first->op_last = last->op_last;
1896 first->op_children += last->op_children;
1897 if (first->op_children)
1898 last->op_flags |= OPf_KIDS;
1899
1900 Safefree(last);
1901 return (OP*)first;
1902}
1903
1904OP *
8ac85365 1905prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1906{
1907 if (!first)
1908 return last;
8990e307
LW		 1909
1910 if (!last)
79072805 1911 return first;
8990e307
LW		 1912
1913 if (last->op_type == type) {
1914 if (type == OP_LIST) { /* already a PUSHMARK there */
1915 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1916 ((LISTOP*)last)->op_first->op_sibling = first;
1917 }
1918 else {
1919 if (!(last->op_flags & OPf_KIDS)) {
1920 ((LISTOP*)last)->op_last = first;
1921 last->op_flags |= OPf_KIDS;
1922 }
1923 first->op_sibling = ((LISTOP*)last)->op_first;
1924 ((LISTOP*)last)->op_first = first;
79072805 1925 }
79072805
LW		 1926 ((LISTOP*)last)->op_children++;
1927 return last;
1928 }
1929
1930 return newLISTOP(type, 0, first, last);
1931}
1932
1933/* Constructors */
1934
1935OP *
8ac85365 1936newNULLLIST(void)
79072805 1937{
8990e307
LW		 1938 return newOP(OP_STUB, 0);
1939}
1940
1941OP *
8ac85365 1942force_list(OP *o)
8990e307 1943{
11343788
MB		 1944 if (!o || o->op_type != OP_LIST)
1945 o = newLISTOP(OP_LIST, 0, o, Nullop);
1946 null(o);
1947 return o;
79072805
LW		 1948}
1949
1950OP *
8ac85365 1951newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1952{
1953 LISTOP *listop;
1954
1955 Newz(1101, listop, 1, LISTOP);
1956
1957 listop->op_type = type;
1958 listop->op_ppaddr = ppaddr[type];
1959 listop->op_children = (first != 0) + (last != 0);
1960 listop->op_flags = flags;
79072805
LW		 1961
1962 if (!last && first)
1963 last = first;
1964 else if (!first && last)
1965 first = last;
8990e307
LW		 1966 else if (first)
1967 first->op_sibling = last;
79072805
LW		 1968 listop->op_first = first;
1969 listop->op_last = last;
8990e307
LW		 1970 if (type == OP_LIST) {
1971 OP* pushop;
1972 pushop = newOP(OP_PUSHMARK, 0);
1973 pushop->op_sibling = first;
1974 listop->op_first = pushop;
1975 listop->op_flags |= OPf_KIDS;
1976 if (!last)
1977 listop->op_last = pushop;
1978 }
1979 else if (listop->op_children)
1980 listop->op_flags |= OPf_KIDS;
79072805
LW		 1981
1982 return (OP*)listop;
1983}
1984
1985OP *
8ac85365 1986newOP(I32 type, I32 flags)
79072805 1987{
11343788
MB		 1988 OP *o;
1989 Newz(1101, o, 1, OP);
1990 o->op_type = type;
1991 o->op_ppaddr = ppaddr[type];
1992 o->op_flags = flags;
79072805 1993
11343788
MB		 1994 o->op_next = o;
1995 o->op_private = 0 + (flags >> 8);
79072805 1996 if (opargs[type] & OA_RETSCALAR)
11343788 1997 scalar(o);
79072805 1998 if (opargs[type] & OA_TARGET)
11343788
MB		 1999 o->op_targ = pad_alloc(type, SVs_PADTMP);
2000 return CHECKOP(type, o);
79072805
LW		 2001}
2002
2003OP *
8ac85365 2004newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 2005{
2006 UNOP *unop;
2007
93a17b20 2008 if (!first)
aeea060c 2009 first = newOP(OP_STUB, 0);
8990e307
LW		 2010 if (opargs[type] & OA_MARK)
2011 first = force_list(first);
93a17b20 2012
79072805
LW		 2013 Newz(1101, unop, 1, UNOP);
2014 unop->op_type = type;
2015 unop->op_ppaddr = ppaddr[type];
2016 unop->op_first = first;
2017 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2018 unop->op_private = 1 | (flags >> 8);
e50aee73 2019 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2020 if (unop->op_next)
2021 return (OP*)unop;
2022
a0d0e21e 2023 return fold_constants((OP *) unop);
79072805
LW		 2024}
2025
2026OP *
8ac85365 2027newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2028{
2029 BINOP *binop;
2030 Newz(1101, binop, 1, BINOP);
2031
2032 if (!first)
2033 first = newOP(OP_NULL, 0);
2034
2035 binop->op_type = type;
2036 binop->op_ppaddr = ppaddr[type];
2037 binop->op_first = first;
2038 binop->op_flags = flags | OPf_KIDS;
2039 if (!last) {
2040 last = first;
c07a80fd 2041 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2042 }
2043 else {
c07a80fd 2044 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2045 first->op_sibling = last;
2046 }
2047
e50aee73 2048 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 2049 if (binop->op_next)
2050 return (OP*)binop;
2051
2052 binop->op_last = last = binop->op_first->op_sibling;
2053
a0d0e21e 2054 return fold_constants((OP *)binop);
79072805
LW		 2055}
2056
a0ed51b3
LW		 2057static int
2058utf8compare(const void *a, const void *b)
2059{
2060 int i;
2061 for (i = 0; i < 10; i++) {
2062 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2063 return -1;
2064 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2065 return 1;
2066 }
2067 return 0;
2068}
2069
79072805 2070OP *
8ac85365 2071pmtrans(OP *o, OP *expr, OP *repl)
79072805 2072{
79072805
LW		 2073 SV *tstr = ((SVOP*)expr)->op_sv;
2074 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2075 STRLEN tlen;
2076 STRLEN rlen;
ec49126f 2077 register U8 *t = (U8*)SvPV(tstr, tlen);
2078 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2079 register I32 i;
2080 register I32 j;
a0ed51b3 2081 I32 del;
79072805 2082 I32 complement;
5d06d08e 2083 I32 squash;
79072805
LW		 2084 register short *tbl;
2085
11343788 2086 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2087 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2088 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2089
a0ed51b3
LW		 2090 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
2091 SV* listsv = newSVpv("# comment\n",0);
2092 SV* transv = 0;
2093 U8* tend = t + tlen;
2094 U8* rend = r + rlen;
2095 I32 ulen;
2096 U32 tfirst = 1;
2097 U32 tlast = 0;
2098 I32 tdiff;
2099 U32 rfirst = 1;
2100 U32 rlast = 0;
2101 I32 rdiff;
2102 I32 diff;
2103 I32 none = 0;
2104 U32 max = 0;
2105 I32 bits;
2106 I32 grows = 0;
2107 I32 havefinal = 0;
2108 U32 final;
2109 HV *hv;
2110 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2111 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2112
2113 if (complement) {
2114 U8 tmpbuf[10];
2115 U8** cp;
2116 UV nextmin = 0;
2117 New(1109, cp, tlen, U8*);
2118 i = 0;
2119 transv = newSVpv("",0);
2120 while (t < tend) {
2121 cp[i++] = t;
2122 t += UTF8SKIP(t);
2123 if (*t == 0xff) {
2124 t++;
2125 t += UTF8SKIP(t);
2126 }
2127 }
2128 qsort(cp, i, sizeof(U8*), utf8compare);
2129 for (j = 0; j < i; j++) {
2130 U8 *s = cp[j];
2131 UV val = utf8_to_uv(s, &ulen);
2132 s += ulen;
2133 diff = val - nextmin;
2134 if (diff > 0) {
2135 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2136 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2137 if (diff > 1) {
2138 t = uv_to_utf8(tmpbuf, val - 1);
2139 sv_catpvn(transv, "\377", 1);
dfe13c55 2140 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2141 }
2142 }
2143 if (*s == 0xff)
2144 val = utf8_to_uv(s+1, &ulen);
2145 if (val >= nextmin)
2146 nextmin = val + 1;
2147 }
2148 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2149 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2150 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2151 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2152 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2153 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2154 tlen = SvCUR(transv);
2155 tend = t + tlen;
2156 }
2157 else if (!rlen && !del) {
2158 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2159 }
2160 if (!squash) {
2161 if (to_utf && from_utf) { /* only counting characters */
2162 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2163 o->op_private |= OPpTRANS_IDENTICAL;
2164 }
2165 else { /* straight latin-1 translation */
2166 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2167 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2168 o->op_private |= OPpTRANS_IDENTICAL;
2169 }
a0ed51b3
LW		 2170 }
2171
2172 while (t < tend || tfirst <= tlast) {
2173 /* see if we need more "t" chars */
2174 if (tfirst > tlast) {
2175 tfirst = (I32)utf8_to_uv(t, &ulen);
2176 t += ulen;
2177 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2178 tlast = (I32)utf8_to_uv(++t, &ulen);
2179 t += ulen;
2180 }
2181 else
2182 tlast = tfirst;
2183 }
2184
2185 /* now see if we need more "r" chars */
2186 if (rfirst > rlast) {
2187 if (r < rend) {
2188 rfirst = (I32)utf8_to_uv(r, &ulen);
2189 r += ulen;
2190 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2191 rlast = (I32)utf8_to_uv(++r, &ulen);
2192 r += ulen;
2193 }
2194 else
2195 rlast = rfirst;
2196 }
2197 else {
2198 if (!havefinal++)
2199 final = rlast;
2200 rfirst = rlast = 0xffffffff;
2201 }
2202 }
2203
2204 /* now see which range will peter our first, if either. */
2205 tdiff = tlast - tfirst;
2206 rdiff = rlast - rfirst;
2207
2208 if (tdiff <= rdiff)
2209 diff = tdiff;
2210 else
2211 diff = rdiff;
2212
2213 if (rfirst == 0xffffffff) {
2214 diff = tdiff; /* oops, pretend rdiff is infinite */
2215 if (diff > 0)
2216 sv_catpvf(listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
2217 else
2218 sv_catpvf(listsv, "%04x\t\tXXXX\n", tfirst);
2219 }
2220 else {
2221 if (diff > 0)
2222 sv_catpvf(listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
2223 else
2224 sv_catpvf(listsv, "%04x\t\t%04x\n", tfirst, rfirst);
2225
2226 if (rfirst + diff > max)
2227 max = rfirst + diff;
2228 rfirst += diff + 1;
2229 if (!grows) {
2230 if (rfirst <= 0x80)
2231 ;
2232 else if (rfirst <= 0x800)
2233 grows |= (tfirst < 0x80);
2234 else if (rfirst <= 0x10000)
2235 grows |= (tfirst < 0x800);
2236 else if (rfirst <= 0x200000)
2237 grows |= (tfirst < 0x10000);
2238 else if (rfirst <= 0x4000000)
2239 grows |= (tfirst < 0x200000);
2240 else if (rfirst <= 0x80000000)
2241 grows |= (tfirst < 0x4000000);
2242 }
2243 }
2244 tfirst += diff + 1;
2245 }
2246
2247 none = ++max;
2248 if (del)
2249 del = ++max;
2250
2251 if (max > 0xffff)
2252 bits = 32;
2253 else if (max > 0xff)
2254 bits = 16;
2255 else
2256 bits = 8;
2257
2258 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2259 SvREFCNT_dec(listsv);
2260 if (transv)
2261 SvREFCNT_dec(transv);
2262
2263 if (!del && havefinal)
2264 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2265
2266 if (grows && to_utf)
2267 o->op_private |= OPpTRANS_GROWS;
2268
2269 op_free(expr);
2270 op_free(repl);
2271 return o;
2272 }
2273
2274 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2275 if (complement) {
2276 Zero(tbl, 256, short);
2277 for (i = 0; i < tlen; i++)
ec49126f 2278 tbl[t[i]] = -1;
79072805
LW		 2279 for (i = 0, j = 0; i < 256; i++) {
2280 if (!tbl[i]) {
2281 if (j >= rlen) {
a0ed51b3 2282 if (del)
79072805
LW		 2283 tbl[i] = -2;
2284 else if (rlen)
ec49126f 2285 tbl[i] = r[j-1];
79072805
LW		 2286 else
2287 tbl[i] = i;
2288 }
2289 else
ec49126f 2290 tbl[i] = r[j++];
79072805
LW		 2291 }
2292 }
2293 }
2294 else {
a0ed51b3 2295 if (!rlen && !del) {
79072805 2296 r = t; rlen = tlen;
5d06d08e 2297 if (!squash)
4757a243 2298 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2299 }
2300 for (i = 0; i < 256; i++)
2301 tbl[i] = -1;
2302 for (i = 0, j = 0; i < tlen; i++,j++) {
2303 if (j >= rlen) {
a0ed51b3 2304 if (del) {
ec49126f 2305 if (tbl[t[i]] == -1)
2306 tbl[t[i]] = -2;
79072805
LW		 2307 continue;
2308 }
2309 --j;
2310 }
ec49126f 2311 if (tbl[t[i]] == -1)
2312 tbl[t[i]] = r[j];
79072805
LW		 2313 }
2314 }
2315 op_free(expr);
2316 op_free(repl);
2317
11343788 2318 return o;
79072805
LW		 2319}
2320
2321OP *
8ac85365 2322newPMOP(I32 type, I32 flags)
79072805 2323{
11343788 2324 dTHR;
79072805
LW		 2325 PMOP *pmop;
2326
2327 Newz(1101, pmop, 1, PMOP);
2328 pmop->op_type = type;
2329 pmop->op_ppaddr = ppaddr[type];
2330 pmop->op_flags = flags;
c07a80fd 2331 pmop->op_private = 0 | (flags >> 8);
79072805 2332
3280af22 2333 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2334 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2335 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2336 pmop->op_pmpermflags |= PMf_LOCALE;
2337 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2338
79072805 2339 /* link into pm list */
3280af22
NIS		 2340 if (type != OP_TRANS && PL_curstash) {
2341 pmop->op_pmnext = HvPMROOT(PL_curstash);
2342 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2343 }
2344
2345 return (OP*)pmop;
2346}
2347
2348OP *
8ac85365 2349pmruntime(OP *o, OP *expr, OP *repl)
79072805 2350{
5c0ca799 2351 dTHR;
79072805
LW		 2352 PMOP *pm;
2353 LOGOP *rcop;
ce862d02 2354 I32 repl_has_vars = 0;
79072805 2355
11343788
MB		 2356 if (o->op_type == OP_TRANS)
2357 return pmtrans(o, expr, repl);
79072805 2358
3280af22 2359 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2360 pm = (PMOP*)o;
79072805
LW		 2361
2362 if (expr->op_type == OP_CONST) {
463ee0b2 2363 STRLEN plen;
79072805 2364 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2365 char *p = SvPV(pat, plen);
11343788 2366 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2367 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2368 p = SvPV(pat, plen);
79072805
LW		 2369 pm->op_pmflags |= PMf_SKIPWHITE;
2370 }
15e52e56 2371 pm->op_pmregexp = CALLREGCOMP(p, p + plen, pm);
aeea060c 2372 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2373 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2374 op_free(expr);
2375 }
2376 else {
3280af22
NIS		 2377 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2378 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2379 ? OP_REGCRESET
2380 : OP_REGCMAYBE),0,expr);
463ee0b2 2381
79072805
LW		 2382 Newz(1101, rcop, 1, LOGOP);
2383 rcop->op_type = OP_REGCOMP;
2384 rcop->op_ppaddr = ppaddr[OP_REGCOMP];
2385 rcop->op_first = scalar(expr);
3280af22 2386 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2387 ? (OPf_SPECIAL | OPf_KIDS)
2388 : OPf_KIDS);
79072805 2389 rcop->op_private = 1;
11343788 2390 rcop->op_other = o;
79072805
LW		 2391
2392 /* establish postfix order */
3280af22 2393 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2394 LINKLIST(expr);
2395 rcop->op_next = expr;
2396 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2397 }
2398 else {
2399 rcop->op_next = LINKLIST(expr);
2400 expr->op_next = (OP*)rcop;
2401 }
79072805 2402
11343788 2403 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2404 }
2405
2406 if (repl) {
748a9306
LW		 2407 OP *curop;
2408 if (pm->op_pmflags & PMf_EVAL)
2409 curop = 0;
554b3eca 2410#ifdef USE_THREADS
2faa37cc 2411 else if (repl->op_type == OP_THREADSV
554b3eca 2412 && strchr("&`'123456789+",
533c011a 2413 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2414 {
2415 curop = 0;
2416 }
2417#endif /* USE_THREADS */
748a9306
LW		 2418 else if (repl->op_type == OP_CONST)
2419 curop = repl;
79072805 2420 else {
79072805
LW		 2421 OP *lastop = 0;
2422 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
2423 if (opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2424#ifdef USE_THREADS
ce862d02
IZ		 2425 if (curop->op_type == OP_THREADSV) {
2426 repl_has_vars = 1;
be949f6f 2427 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2428 break;
554b3eca
MB		 2429 }
2430#else
79072805
LW		 2431 if (curop->op_type == OP_GV) {
2432 GV *gv = ((GVOP*)curop)->op_gv;
ce862d02 2433 repl_has_vars = 1;
93a17b20 2434 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2435 break;
2436 }
554b3eca 2437#endif /* USE_THREADS */
79072805
LW		 2438 else if (curop->op_type == OP_RV2CV)
2439 break;
2440 else if (curop->op_type == OP_RV2SV ||
2441 curop->op_type == OP_RV2AV ||
2442 curop->op_type == OP_RV2HV ||
2443 curop->op_type == OP_RV2GV) {
2444 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2445 break;
2446 }
748a9306
LW		 2447 else if (curop->op_type == OP_PADSV ||
2448 curop->op_type == OP_PADAV ||
2449 curop->op_type == OP_PADHV ||
554b3eca 2450 curop->op_type == OP_PADANY) {
ce862d02 2451 repl_has_vars = 1;
748a9306 2452 }
1167e5da
SM		 2453 else if (curop->op_type == OP_PUSHRE)
2454 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2455 else
2456 break;
2457 }
2458 lastop = curop;
2459 }
748a9306 2460 }
ce862d02
IZ		 2461 if (curop == repl
2462 && !(repl_has_vars
2463 && (!pm->op_pmregexp
2464 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2465 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2466 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2467 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2468 }
2469 else {
ce862d02
IZ		 2470 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2471 pm->op_pmflags |= PMf_MAYBE_CONST;
2472 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2473 }
748a9306
LW		 2474 Newz(1101, rcop, 1, LOGOP);
2475 rcop->op_type = OP_SUBSTCONT;
2476 rcop->op_ppaddr = ppaddr[OP_SUBSTCONT];
2477 rcop->op_first = scalar(repl);
2478 rcop->op_flags |= OPf_KIDS;
2479 rcop->op_private = 1;
11343788 2480 rcop->op_other = o;
748a9306
LW		 2481
2482 /* establish postfix order */
2483 rcop->op_next = LINKLIST(repl);
2484 repl->op_next = (OP*)rcop;
2485
2486 pm->op_pmreplroot = scalar((OP*)rcop);
2487 pm->op_pmreplstart = LINKLIST(rcop);
2488 rcop->op_next = 0;
79072805
LW		 2489 }
2490 }
2491
2492 return (OP*)pm;
2493}
2494
2495OP *
8ac85365 2496newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2497{
2498 SVOP *svop;
2499 Newz(1101, svop, 1, SVOP);
2500 svop->op_type = type;
2501 svop->op_ppaddr = ppaddr[type];
2502 svop->op_sv = sv;
2503 svop->op_next = (OP*)svop;
2504 svop->op_flags = flags;
2505 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2506 scalar((OP*)svop);
79072805 2507 if (opargs[type] & OA_TARGET)
ed6116ce 2508 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2509 return CHECKOP(type, svop);
79072805
LW		 2510}
2511
2512OP *
8ac85365 2513newGVOP(I32 type, I32 flags, GV *gv)
79072805 2514{
11343788 2515 dTHR;
79072805
LW		 2516 GVOP *gvop;
2517 Newz(1101, gvop, 1, GVOP);
2518 gvop->op_type = type;
2519 gvop->op_ppaddr = ppaddr[type];
8990e307 2520 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2521 gvop->op_next = (OP*)gvop;
2522 gvop->op_flags = flags;
2523 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2524 scalar((OP*)gvop);
79072805 2525 if (opargs[type] & OA_TARGET)
ed6116ce 2526 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2527 return CHECKOP(type, gvop);
79072805
LW		 2528}
2529
2530OP *
8ac85365 2531newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2532{
2533 PVOP *pvop;
2534 Newz(1101, pvop, 1, PVOP);
2535 pvop->op_type = type;
2536 pvop->op_ppaddr = ppaddr[type];
2537 pvop->op_pv = pv;
2538 pvop->op_next = (OP*)pvop;
2539 pvop->op_flags = flags;
2540 if (opargs[type] & OA_RETSCALAR)
463ee0b2 2541 scalar((OP*)pvop);
79072805 2542 if (opargs[type] & OA_TARGET)
ed6116ce 2543 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2544 return CHECKOP(type, pvop);
79072805
LW		 2545}
2546
79072805 2547void
8ac85365 2548package(OP *o)
79072805 2549{
11343788 2550 dTHR;
93a17b20 2551 SV *sv;
79072805 2552
3280af22
NIS		 2553 save_hptr(&PL_curstash);
2554 save_item(PL_curstname);
11343788 2555 if (o) {
463ee0b2
LW		 2556 STRLEN len;
2557 char *name;
11343788 2558 sv = cSVOPo->op_sv;
463ee0b2 2559 name = SvPV(sv, len);
3280af22
NIS		 2560 PL_curstash = gv_stashpvn(name,len,TRUE);
2561 sv_setpvn(PL_curstname, name, len);
11343788 2562 op_free(o);
93a17b20
LW		 2563 }
2564 else {
3280af22
NIS		 2565 sv_setpv(PL_curstname,"<none>");
2566 PL_curstash = Nullhv;
93a17b20 2567 }
3280af22
NIS		 2568 PL_copline = NOLINE;
2569 PL_expect = XSTATE;
79072805
LW		 2570}
2571
85e6fe83 2572void
8ac85365 2573utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2574{
a0d0e21e
LW		 2575 OP *pack;
2576 OP *meth;
2577 OP *rqop;
2578 OP *imop;
b1cb66bf 2579 OP *veop;
85e6fe83 2580
a0d0e21e
LW		 2581 if (id->op_type != OP_CONST)
2582 croak("Module name must be constant");
85e6fe83 2583
b1cb66bf 2584 veop = Nullop;
2585
2586 if(version != Nullop) {
2587 SV *vesv = ((SVOP*)version)->op_sv;
2588
2589 if (arg == Nullop && !SvNIOK(vesv)) {
2590 arg = version;
2591 }
2592 else {
2593 OP *pack;
2594 OP *meth;
2595
2596 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2597 croak("Version number must be constant number");
2598
2599 /* Make copy of id so we don't free it twice */
2600 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2601
2602 /* Fake up a method call to VERSION */
2603 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2604 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2605 append_elem(OP_LIST,
2606 prepend_elem(OP_LIST, pack, list(version)),
2607 newUNOP(OP_METHOD, 0, meth)));
2608 }
2609 }
aeea060c 2610
a0d0e21e 2611 /* Fake up an import/unimport */
4633a7c4
LW		 2612 if (arg && arg->op_type == OP_STUB)
2613 imop = arg; /* no import on explicit () */
b1cb66bf 2614 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2615 imop = Nullop; /* use 5.0; */
2616 }
4633a7c4
LW		 2617 else {
2618 /* Make copy of id so we don't free it twice */
2619 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2620 meth = newSVOP(OP_CONST, 0,
2621 aver
2622 ? newSVpv("import", 6)
2623 : newSVpv("unimport", 8)
2624 );
2625 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2626 append_elem(OP_LIST,
2627 prepend_elem(OP_LIST, pack, list(arg)),
2628 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2629 }
2630
2631 /* Fake up a require */
2632 rqop = newUNOP(OP_REQUIRE, 0, id);
a0d0e21e
LW		 2633
2634 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2635 newSUB(floor,
a0d0e21e 2636 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2637 Nullop,
a0d0e21e 2638 append_elem(OP_LINESEQ,
b1cb66bf 2639 append_elem(OP_LINESEQ,
2640 newSTATEOP(0, Nullch, rqop),
2641 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2642 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2643
3280af22
NIS		 2644 PL_copline = NOLINE;
2645 PL_expect = XSTATE;
85e6fe83
LW		 2646}
2647
79072805 2648OP *
8ac85365 2649newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2650{
2651 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2652 list(force_list(subscript)),
2653 list(force_list(listval)) );
79072805
LW		 2654}
2655
76e3520e 2656STATIC I32
8ac85365 2657list_assignment(register OP *o)
79072805 2658{
11343788 2659 if (!o)
79072805
LW		 2660 return TRUE;
2661
11343788
MB		 2662 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2663 o = cUNOPo->op_first;
79072805 2664
11343788
MB		 2665 if (o->op_type == OP_COND_EXPR) {
2666 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2667 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2668
2669 if (t && f)
2670 return TRUE;
2671 if (t || f)
2672 yyerror("Assignment to both a list and a scalar");
2673 return FALSE;
2674 }
2675
11343788
MB		 2676 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2677 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2678 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2679 return TRUE;
2680
11343788 2681 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2682 return TRUE;
2683
11343788 2684 if (o->op_type == OP_RV2SV)
79072805
LW		 2685 return FALSE;
2686
2687 return FALSE;
2688}
2689
2690OP *
8ac85365 2691newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2692{
11343788 2693 OP *o;
79072805 2694
a0d0e21e
LW		 2695 if (optype) {
2696 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2697 return newLOGOP(optype, 0,
2698 mod(scalar(left), optype),
2699 newUNOP(OP_SASSIGN, 0, scalar(right)));
2700 }
2701 else {
2702 return newBINOP(optype, OPf_STACKED,
2703 mod(scalar(left), optype), scalar(right));
2704 }
2705 }
2706
79072805 2707 if (list_assignment(left)) {
6ee623d5 2708 dTHR;
3280af22
NIS		 2709 PL_modcount = 0;
2710 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2711 left = mod(left, OP_AASSIGN);
3280af22
NIS		 2712 if (PL_eval_start)
2713 PL_eval_start = 0;
748a9306 2714 else {
a0d0e21e
LW		 2715 op_free(left);
2716 op_free(right);
2717 return Nullop;
2718 }
11343788 2719 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2720 list(force_list(right)),
2721 list(force_list(left)) );
11343788 2722 o->op_private = 0 | (flags >> 8);
a0d0e21e 2723 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 2724 OP *curop;
11343788 2725 OP *lastop = o;
3280af22 2726 PL_generation++;
11343788 2727 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
79072805
LW		 2728 if (opargs[curop->op_type] & OA_DANGEROUS) {
2729 if (curop->op_type == OP_GV) {
2730 GV *gv = ((GVOP*)curop)->op_gv;
3280af22 2731 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 2732 break;
3280af22 2733 SvCUR(gv) = PL_generation;
79072805 2734 }
748a9306
LW		 2735 else if (curop->op_type == OP_PADSV ||
2736 curop->op_type == OP_PADAV ||
2737 curop->op_type == OP_PADHV ||
2738 curop->op_type == OP_PADANY) {
3280af22 2739 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 2740 SV *sv = svp[curop->op_targ];
3280af22 2741 if (SvCUR(sv) == PL_generation)
748a9306 2742 break;
3280af22 2743 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 2744 }
79072805
LW		 2745 else if (curop->op_type == OP_RV2CV)
2746 break;
2747 else if (curop->op_type == OP_RV2SV ||
2748 curop->op_type == OP_RV2AV ||
2749 curop->op_type == OP_RV2HV ||
2750 curop->op_type == OP_RV2GV) {
2751 if (lastop->op_type != OP_GV) /* funny deref? */
2752 break;
2753 }
1167e5da
SM		 2754 else if (curop->op_type == OP_PUSHRE) {
2755 if (((PMOP*)curop)->op_pmreplroot) {
2756 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 2757 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 2758 break;
3280af22 2759 SvCUR(gv) = PL_generation;
1167e5da
SM		 2760 }
2761 }
79072805
LW		 2762 else
2763 break;
2764 }
2765 lastop = curop;
2766 }
11343788
MB		 2767 if (curop != o)
2768 o->op_private = OPpASSIGN_COMMON;
79072805 2769 }
c07a80fd 2770 if (right && right->op_type == OP_SPLIT) {
2771 OP* tmpop;
2772 if ((tmpop = ((LISTOP*)right)->op_first) &&
2773 tmpop->op_type == OP_PUSHRE)
2774 {
2775 PMOP *pm = (PMOP*)tmpop;
2776 if (left->op_type == OP_RV2AV &&
2777 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2778 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2779 {
2780 tmpop = ((UNOP*)left)->op_first;
2781 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2782 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2783 pm->op_pmflags |= PMf_ONCE;
11343788 2784 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2785 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2786 tmpop->op_sibling = Nullop; /* don't free split */
2787 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2788 op_free(o); /* blow off assign */
54310121 2789 right->op_flags &= ~OPf_WANT;
a5f75d66 2790 /* "I don't know and I don't care." */
c07a80fd 2791 return right;
2792 }
2793 }
2794 else {
3280af22 2795 if (PL_modcount < 10000 &&
c07a80fd 2796 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2797 {
2798 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2799 if (SvIVX(sv) == 0)
3280af22 2800 sv_setiv(sv, PL_modcount+1);
c07a80fd 2801 }
2802 }
2803 }
2804 }
11343788 2805 return o;
79072805
LW		 2806 }
2807 if (!right)
2808 right = newOP(OP_UNDEF, 0);
2809 if (right->op_type == OP_READLINE) {
2810 right->op_flags |= OPf_STACKED;
463ee0b2 2811 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2812 }
a0d0e21e 2813 else {
3280af22 2814 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2815 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2816 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 2817 if (PL_eval_start)
2818 PL_eval_start = 0;
748a9306 2819 else {
11343788 2820 op_free(o);
a0d0e21e
LW		 2821 return Nullop;
2822 }
2823 }
11343788 2824 return o;
79072805
LW		 2825}
2826
2827OP *
8ac85365 2828newSTATEOP(I32 flags, char *label, OP *o)
79072805 2829{
11343788 2830 dTHR;
bbce6d69 2831 U32 seq = intro_my();
79072805
LW		 2832 register COP *cop;
2833
2834 Newz(1101, cop, 1, COP);
3280af22 2835 if (PERLDB_LINE && PL_curcop->cop_line && PL_curstash != PL_debstash) {
8990e307
LW		 2836 cop->op_type = OP_DBSTATE;
2837 cop->op_ppaddr = ppaddr[ OP_DBSTATE ];
2838 }
2839 else {
2840 cop->op_type = OP_NEXTSTATE;
2841 cop->op_ppaddr = ppaddr[ OP_NEXTSTATE ];
2842 }
79072805 2843 cop->op_flags = flags;
a0ed51b3 2844 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 2845#ifdef NATIVE_HINTS
2846 cop->op_private |= NATIVE_HINTS;
2847#endif
a0ed51b3 2848 compiling.op_private = cop->op_private;
79072805
LW		 2849 cop->op_next = (OP*)cop;
2850
463ee0b2
LW		 2851 if (label) {
2852 cop->cop_label = label;
3280af22 2853 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 2854 }
bbce6d69 2855 cop->cop_seq = seq;
3280af22 2856 cop->cop_arybase = PL_curcop->cop_arybase;
599cee73
PM		 2857 if (PL_curcop->cop_warnings == WARN_NONE
2858 || PL_curcop->cop_warnings == WARN_ALL)
2859 cop->cop_warnings = PL_curcop->cop_warnings ;
2860 else
2861 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
2862
79072805 2863
3280af22
NIS		 2864 if (PL_copline == NOLINE)
2865 cop->cop_line = PL_curcop->cop_line;
79072805 2866 else {
3280af22
NIS		 2867 cop->cop_line = PL_copline;
2868 PL_copline = NOLINE;
79072805 2869 }
3280af22
NIS		 2870 cop->cop_filegv = (GV*)SvREFCNT_inc(PL_curcop->cop_filegv);
2871 cop->cop_stash = PL_curstash;
79072805 2872
3280af22
NIS		 2873 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2874 SV **svp = av_fetch(GvAV(PL_curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2875 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 2876 (void)SvIOK_on(*svp);
a5f75d66 2877 SvIVX(*svp) = 1;
93a17b20
LW		 2878 SvSTASH(*svp) = (HV*)cop;
2879 }
2880 }
2881
11343788 2882 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2883}
2884
bbce6d69 2885/* "Introduce" my variables to visible status. */
2886U32
8ac85365 2887intro_my(void)
bbce6d69 2888{
2889 SV **svp;
2890 SV *sv;
2891 I32 i;
2892
3280af22
NIS		 2893 if (! PL_min_intro_pending)
2894 return PL_cop_seqmax;
bbce6d69 2895
3280af22
NIS		 2896 svp = AvARRAY(PL_comppad_name);
2897 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
2898 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
bbce6d69 2899 SvIVX(sv) = 999999999; /* Don't know scope end yet. */
3280af22 2900 SvNVX(sv) = (double)PL_cop_seqmax;
bbce6d69 2901 }
2902 }
3280af22
NIS		 2903 PL_min_intro_pending = 0;
2904 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
2905 return PL_cop_seqmax++;
bbce6d69 2906}
2907
79072805 2908OP *
8ac85365 2909newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2910{
883ffac3
CS		 2911 return new_logop(type, flags, &first, &other);
2912}
2913
3bd495df 2914STATIC OP *
883ffac3
CS		 2915new_logop(I32 type, I32 flags, OP** firstp, OP** otherp)
2916{
11343788 2917 dTHR;
79072805 2918 LOGOP *logop;
11343788 2919 OP *o;
883ffac3
CS		 2920 OP *first = *firstp;
2921 OP *other = *otherp;
79072805 2922
a0d0e21e
LW		 2923 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
2924 return newBINOP(type, flags, scalar(first), scalar(other));
2925
8990e307 2926 scalarboolean(first);
79072805
LW		 2927 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
2928 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
2929 if (type == OP_AND || type == OP_OR) {
2930 if (type == OP_AND)
2931 type = OP_OR;
2932 else
2933 type = OP_AND;
11343788 2934 o = first;
883ffac3 2935 first = *firstp = cUNOPo->op_first;
11343788
MB		 2936 if (o->op_next)
2937 first->op_next = o->op_next;
2938 cUNOPo->op_first = Nullop;
2939 op_free(o);
79072805
LW		 2940 }
2941 }
2942 if (first->op_type == OP_CONST) {
599cee73
PM		 2943 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
2944 warner(WARN_PRECEDENCE, "Probable precedence problem on %s",
2945 op_desc[type]);
79072805
LW		 2946 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
2947 op_free(first);
883ffac3 2948 *firstp = Nullop;
79072805
LW		 2949 return other;
2950 }
2951 else {
2952 op_free(other);
883ffac3 2953 *otherp = Nullop;
79072805
LW		 2954 return first;
2955 }
2956 }
2957 else if (first->op_type == OP_WANTARRAY) {
2958 if (type == OP_AND)
2959 list(other);
2960 else
2961 scalar(other);
2962 }
599cee73 2963 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 2964 OP *k1 = ((UNOP*)first)->op_first;
2965 OP *k2 = k1->op_sibling;
2966 OPCODE warnop = 0;
2967 switch (first->op_type)
2968 {
2969 case OP_NULL:
2970 if (k2 && k2->op_type == OP_READLINE
2971 && (k2->op_flags & OPf_STACKED)
55d729e4 2972 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
a6006777 2973 warnop = k2->op_type;
2974 break;
2975
2976 case OP_SASSIGN:
68dc0745 2977 if (k1->op_type == OP_READDIR
2978 || k1->op_type == OP_GLOB
2979 || k1->op_type == OP_EACH)
a6006777 2980 warnop = k1->op_type;
2981 break;
2982 }
8ebc5c01 2983 if (warnop) {
3280af22
NIS		 2984 line_t oldline = PL_curcop->cop_line;
2985 PL_curcop->cop_line = PL_copline;
599cee73
PM		 2986 warner(WARN_UNSAFE,
2987 "Value of %s%s can be \"0\"; test with defined()",
68dc0745 2988 op_desc[warnop],
2989 ((warnop == OP_READLINE || warnop == OP_GLOB)
2990 ? " construct" : "() operator"));
3280af22 2991 PL_curcop->cop_line = oldline;
8ebc5c01 2992 }
a6006777 2993 }
79072805
LW		 2994
2995 if (!other)
2996 return first;
2997
a0d0e21e
LW		 2998 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
2999 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3000
79072805
LW		 3001 Newz(1101, logop, 1, LOGOP);
3002
3003 logop->op_type = type;
3004 logop->op_ppaddr = ppaddr[type];
3005 logop->op_first = first;
3006 logop->op_flags = flags | OPf_KIDS;
3007 logop->op_other = LINKLIST(other);
c07a80fd 3008 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3009
3010 /* establish postfix order */
3011 logop->op_next = LINKLIST(first);
3012 first->op_next = (OP*)logop;
3013 first->op_sibling = other;
3014
11343788
MB		 3015 o = newUNOP(OP_NULL, 0, (OP*)logop);
3016 other->op_next = o;
79072805 3017
11343788 3018 return o;
79072805
LW		 3019}
3020
3021OP *
8ac85365 3022newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3023{
11343788 3024 dTHR;
79072805 3025 CONDOP *condop;
11343788 3026 OP *o;
79072805 3027
b1cb66bf 3028 if (!falseop)
3029 return newLOGOP(OP_AND, 0, first, trueop);
3030 if (!trueop)
3031 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3032
8990e307 3033 scalarboolean(first);
79072805
LW		 3034 if (first->op_type == OP_CONST) {
3035 if (SvTRUE(((SVOP*)first)->op_sv)) {
3036 op_free(first);
b1cb66bf 3037 op_free(falseop);
3038 return trueop;
79072805
LW		 3039 }
3040 else {
3041 op_free(first);
b1cb66bf 3042 op_free(trueop);
3043 return falseop;
79072805
LW		 3044 }
3045 }
3046 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3047 list(trueop);
3048 scalar(falseop);
79072805
LW		 3049 }
3050 Newz(1101, condop, 1, CONDOP);
3051
3052 condop->op_type = OP_COND_EXPR;
3053 condop->op_ppaddr = ppaddr[OP_COND_EXPR];
3054 condop->op_first = first;
3055 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 3056 condop->op_true = LINKLIST(trueop);
3057 condop->op_false = LINKLIST(falseop);
c07a80fd 3058 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3059
3060 /* establish postfix order */
3061 condop->op_next = LINKLIST(first);
3062 first->op_next = (OP*)condop;
3063
b1cb66bf 3064 first->op_sibling = trueop;
3065 trueop->op_sibling = falseop;
11343788 3066 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 3067
5dc0d613
MB		 3068 trueop->op_next = o;
3069 falseop->op_next = o;
79072805 3070
11343788 3071 return o;
79072805
LW		 3072}
3073
3074OP *
8ac85365 3075newRANGE(I32 flags, OP *left, OP *right)
79072805 3076{
b35b2403 3077 dTHR;
79072805
LW		 3078 CONDOP *condop;
3079 OP *flip;
3080 OP *flop;
11343788 3081 OP *o;
79072805
LW		 3082
3083 Newz(1101, condop, 1, CONDOP);
3084
3085 condop->op_type = OP_RANGE;
3086 condop->op_ppaddr = ppaddr[OP_RANGE];
3087 condop->op_first = left;
3088 condop->op_flags = OPf_KIDS;
3089 condop->op_true = LINKLIST(left);
3090 condop->op_false = LINKLIST(right);
c07a80fd 3091 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3092
3093 left->op_sibling = right;
3094
3095 condop->op_next = (OP*)condop;
3096 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
3097 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3098 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 3099 linklist(flop);
3100
3101 left->op_next = flip;
3102 right->op_next = flop;
3103
ed6116ce 3104 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 3105 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 3106 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3107 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3108
3109 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3110 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3111
11343788 3112 flip->op_next = o;
79072805 3113 if (!flip->op_private || !flop->op_private)
11343788 3114 linklist(o); /* blow off optimizer unless constant */
79072805 3115
11343788 3116 return o;
79072805
LW		 3117}
3118
3119OP *
8ac85365 3120newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3121{
11343788 3122 dTHR;
463ee0b2 3123 OP* listop;
11343788 3124 OP* o;
463ee0b2 3125 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3126 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3127
463ee0b2
LW		 3128 if (expr) {
3129 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3130 return block; /* do {} while 0 does once */
fb73857a 3131 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3132 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3133 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3134 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3135 } else if (expr->op_flags & OPf_KIDS) {
3136 OP *k1 = ((UNOP*)expr)->op_first;
3137 OP *k2 = (k1) ? k1->op_sibling : NULL;
3138 switch (expr->op_type) {
3139 case OP_NULL:
3140 if (k2 && k2->op_type == OP_READLINE
3141 && (k2->op_flags & OPf_STACKED)
3142 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3143 expr = newUNOP(OP_DEFINED, 0, expr);
3144 break;
3145
3146 case OP_SASSIGN:
3147 if (k1->op_type == OP_READDIR
3148 || k1->op_type == OP_GLOB
3149 || k1->op_type == OP_EACH)
3150 expr = newUNOP(OP_DEFINED, 0, expr);
3151 break;
3152 }
774d564b 3153 }
463ee0b2 3154 }
93a17b20 3155
8990e307 3156 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3157 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3158
883ffac3
CS		 3159 if (listop)
3160 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3161
11343788
MB		 3162 if (once && o != listop)
3163 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3164
11343788
MB		 3165 if (o == listop)
3166 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3167
11343788
MB		 3168 o->op_flags |= flags;
3169 o = scope(o);
3170 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3171 return o;
79072805
LW		 3172}
3173
3174OP *
8ac85365 3175newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3176{
11343788 3177 dTHR;
79072805
LW		 3178 OP *redo;
3179 OP *next = 0;
3180 OP *listop;
11343788 3181 OP *o;
79072805
LW		 3182 OP *condop;
3183
fb73857a 3184 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3185 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3186 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3187 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3188 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3189 OP *k1 = ((UNOP*)expr)->op_first;
3190 OP *k2 = (k1) ? k1->op_sibling : NULL;
3191 switch (expr->op_type) {
3192 case OP_NULL:
3193 if (k2 && k2->op_type == OP_READLINE
3194 && (k2->op_flags & OPf_STACKED)
3195 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3196 expr = newUNOP(OP_DEFINED, 0, expr);
3197 break;
3198
3199 case OP_SASSIGN:
3200 if (k1->op_type == OP_READDIR
3201 || k1->op_type == OP_GLOB
3202 || k1->op_type == OP_EACH)
3203 expr = newUNOP(OP_DEFINED, 0, expr);
3204 break;
3205 }
748a9306 3206 }
79072805
LW		 3207
3208 if (!block)
3209 block = newOP(OP_NULL, 0);
3210
3211 if (cont)
3212 next = LINKLIST(cont);
fb73857a 3213 if (expr) {
79072805 3214 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3215 if ((line_t)whileline != NOLINE) {
3280af22 3216 PL_copline = whileline;
fb73857a 3217 cont = append_elem(OP_LINESEQ, cont,
3218 newSTATEOP(0, Nullch, Nullop));
3219 }
3220 }
79072805 3221
463ee0b2 3222 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3223 redo = LINKLIST(listop);
3224
3225 if (expr) {
3280af22 3226 PL_copline = whileline;
883ffac3
CS		 3227 scalar(listop);
3228 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3229 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3230 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3231 op_free((OP*)loop);
883ffac3 3232 return Nullop; /* listop already freed by new_logop */
463ee0b2 3233 }
883ffac3
CS		 3234 if (listop)
3235 ((LISTOP*)listop)->op_last->op_next = condop =
3236 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3237 if (!next)
3238 next = condop;
3239 }
3240 else
11343788 3241 o = listop;
79072805
LW		 3242
3243 if (!loop) {
3244 Newz(1101,loop,1,LOOP);
3245 loop->op_type = OP_ENTERLOOP;
3246 loop->op_ppaddr = ppaddr[OP_ENTERLOOP];
3247 loop->op_private = 0;
3248 loop->op_next = (OP*)loop;
3249 }
3250
11343788 3251 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3252
3253 loop->op_redoop = redo;
11343788 3254 loop->op_lastop = o;
79072805
LW		 3255
3256 if (next)
3257 loop->op_nextop = next;
3258 else
11343788 3259 loop->op_nextop = o;
79072805 3260
11343788
MB		 3261 o->op_flags |= flags;
3262 o->op_private |= (flags >> 8);
3263 return o;
79072805
LW		 3264}
3265
3266OP *
8990e307 3267newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3268{
3269 LOOP *loop;
fb73857a 3270 OP *wop;
85e6fe83 3271 int padoff = 0;
4633a7c4 3272 I32 iterflags = 0;
79072805 3273
79072805 3274 if (sv) {
85e6fe83 3275 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306
LW		 3276 sv->op_type = OP_RV2GV;
3277 sv->op_ppaddr = ppaddr[OP_RV2GV];
79072805 3278 }
85e6fe83
LW		 3279 else if (sv->op_type == OP_PADSV) { /* private variable */
3280 padoff = sv->op_targ;
3281 op_free(sv);
3282 sv = Nullop;
3283 }
54b9620d
MB		 3284 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3285 padoff = sv->op_targ;
3286 iterflags |= OPf_SPECIAL;
3287 op_free(sv);
3288 sv = Nullop;
3289 }
79072805 3290 else
c07a80fd 3291 croak("Can't use %s for loop variable", op_desc[sv->op_type]);
79072805
LW		 3292 }
3293 else {
54b9620d
MB		 3294#ifdef USE_THREADS
3295 padoff = find_threadsv("_");
3296 iterflags |= OPf_SPECIAL;
3297#else
3280af22 3298 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3299#endif
79072805 3300 }
5f05dabc 3301 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3302 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3303 iterflags |= OPf_STACKED;
3304 }
89ea2908
GA		 3305 else if (expr->op_type == OP_NULL &&
3306 (expr->op_flags & OPf_KIDS) &&
3307 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3308 {
3309 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3310 * set the STACKED flag to indicate that these values are to be
3311 * treated as min/max values by 'pp_iterinit'.
3312 */
3313 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
3314 CONDOP* range = (CONDOP*) flip->op_first;
3315 OP* left = range->op_first;
3316 OP* right = left->op_sibling;
5152d7c7 3317 LISTOP* listop;
89ea2908
GA		 3318
3319 range->op_flags &= ~OPf_KIDS;
3320 range->op_first = Nullop;
3321
5152d7c7
GS		 3322 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
3323 listop->op_first->op_next = range->op_true;
89ea2908 3324 left->op_next = range->op_false;
5152d7c7
GS		 3325 right->op_next = (OP*)listop;
3326 listop->op_next = listop->op_first;
89ea2908
GA		 3327
3328 op_free(expr);
5152d7c7 3329 expr = (OP*)(listop);
89ea2908
GA		 3330 null(expr);
3331 iterflags |= OPf_STACKED;
3332 }
3333 else {
3334 expr = mod(force_list(expr), OP_GREPSTART);
3335 }
3336
3337
4633a7c4 3338 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3339 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83
LW		 3340 assert(!loop->op_next);
3341 Renew(loop, 1, LOOP);
3342 loop->op_targ = padoff;
fb73857a 3343 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3344 PL_copline = forline;
fb73857a 3345 return newSTATEOP(0, label, wop);
79072805
LW		 3346}
3347
8990e307 3348OP*
8ac85365 3349newLOOPEX(I32 type, OP *label)
8990e307 3350{
11343788
MB		 3351 dTHR;
3352 OP *o;
8990e307 3353 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3354 /* "last()" means "last" */
3355 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3356 o = newOP(type, OPf_SPECIAL);
3357 else {
3358 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
3280af22 3359 ? SvPVx(((SVOP*)label)->op_sv, PL_na)
cdaebead
MB		 3360 : ""));
3361 }
8990e307
LW		 3362 op_free(label);
3363 }
3364 else {
a0d0e21e
LW		 3365 if (label->op_type == OP_ENTERSUB)
3366 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3367 o = newUNOP(type, OPf_STACKED, label);
8990e307 3368 }
3280af22 3369 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3370 return o;
8990e307
LW		 3371}
3372
79072805 3373void
8ac85365 3374cv_undef(CV *cv)
79072805 3375{
11343788
MB		 3376 dTHR;
3377#ifdef USE_THREADS
e858de61
MB		 3378 if (CvMUTEXP(cv)) {
3379 MUTEX_DESTROY(CvMUTEXP(cv));
3380 Safefree(CvMUTEXP(cv));
3381 CvMUTEXP(cv) = 0;
3382 }
11343788
MB		 3383#endif /* USE_THREADS */
3384
a0d0e21e 3385 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3386#ifdef USE_THREADS
3387 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3388 croak("Can't undef active subroutine");
3389#else
a0d0e21e
LW		 3390 if (CvDEPTH(cv))
3391 croak("Can't undef active subroutine");
11343788 3392#endif /* USE_THREADS */
8990e307 3393 ENTER;
a0d0e21e 3394
3280af22
NIS		 3395 SAVESPTR(PL_curpad);
3396 PL_curpad = 0;
a0d0e21e 3397
a5f75d66 3398 if (!CvCLONED(cv))
748a9306 3399 op_free(CvROOT(cv));
79072805 3400 CvROOT(cv) = Nullop;
8990e307 3401 LEAVE;
79072805 3402 }
1d5db326 3403 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3404 CvFLAGS(cv) = 0;
8e07c86e
AD		 3405 SvREFCNT_dec(CvGV(cv));
3406 CvGV(cv) = Nullgv;
3407 SvREFCNT_dec(CvOUTSIDE(cv));
3408 CvOUTSIDE(cv) = Nullcv;
3409 if (CvPADLIST(cv)) {
8ebc5c01 3410 /* may be during global destruction */
3411 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3412 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3413 while (i >= 0) {
3414 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3415 SV* sv = svp ? *svp : Nullsv;
3416 if (!sv)
3417 continue;
3280af22
NIS		 3418 if (sv == (SV*)PL_comppad_name)
3419 PL_comppad_name = Nullav;
3420 else if (sv == (SV*)PL_comppad) {
3421 PL_comppad = Nullav;
3422 PL_curpad = Null(SV**);
46fc3d4c 3423 }
3424 SvREFCNT_dec(sv);
8ebc5c01 3425 }
3426 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3427 }
8e07c86e
AD		 3428 CvPADLIST(cv) = Nullav;
3429 }
79072805
LW		 3430}
3431
5f05dabc 3432#ifdef DEBUG_CLOSURES
76e3520e 3433STATIC void
5f05dabc 3434cv_dump(cv)
3435CV* cv;
3436{
3437 CV *outside = CvOUTSIDE(cv);
3438 AV* padlist = CvPADLIST(cv);
4fdae800 3439 AV* pad_name;
3440 AV* pad;
3441 SV** pname;
3442 SV** ppad;
5f05dabc 3443 I32 ix;
3444
fb73857a 3445 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3446 cv,
3447 (CvANON(cv) ? "ANON"
6b88bc9c 3448 : (cv == PL_main_cv) ? "MAIN"
07055b4c 3449 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3450 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3451 outside,
3452 (!outside ? "null"
3453 : CvANON(outside) ? "ANON"
6b88bc9c 3454 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3455 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3456 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3457
4fdae800 3458 if (!padlist)
3459 return;
3460
3461 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3462 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3463 pname = AvARRAY(pad_name);
3464 ppad = AvARRAY(pad);
3465
93965878 3466 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3467 if (SvPOK(pname[ix]))
fb73857a 3468 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3469 ix, ppad[ix],
3470 SvFAKE(pname[ix]) ? "FAKE " : "",
3471 SvPVX(pname[ix]),
ab50184a
CS		 3472 (long)I_32(SvNVX(pname[ix])),
3473 (long)SvIVX(pname[ix]));
5f05dabc 3474 }
3475}
3476#endif /* DEBUG_CLOSURES */
3477
76e3520e 3478STATIC CV *
8ac85365 3479cv_clone2(CV *proto, CV *outside)
748a9306 3480{
11343788 3481 dTHR;
748a9306
LW		 3482 AV* av;
3483 I32 ix;
3484 AV* protopadlist = CvPADLIST(proto);
3485 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3486 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3487 SV** pname = AvARRAY(protopad_name);
3488 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3489 I32 fname = AvFILLp(protopad_name);
3490 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3491 AV* comppadlist;
3492 CV* cv;
3493
07055b4c
CS		 3494 assert(!CvUNIQUE(proto));
3495
748a9306 3496 ENTER;
3280af22
NIS		 3497 SAVESPTR(PL_curpad);
3498 SAVESPTR(PL_comppad);
3499 SAVESPTR(PL_comppad_name);
3500 SAVESPTR(PL_compcv);
748a9306 3501
3280af22 3502 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3503 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3504 CvCLONED_on(cv);
5f05dabc 3505 if (CvANON(proto))
3506 CvANON_on(cv);
748a9306 3507
11343788 3508#ifdef USE_THREADS
12ca11f6 3509 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3510 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3511 CvOWNER(cv) = 0;
3512#endif /* USE_THREADS */
748a9306 3513 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3514 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3515 CvSTASH(cv) = CvSTASH(proto);
3516 CvROOT(cv) = CvROOT(proto);
3517 CvSTART(cv) = CvSTART(proto);
5f05dabc 3518 if (outside)
3519 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3520
68dc0745 3521 if (SvPOK(proto))
3522 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3523
3280af22 3524 PL_comppad_name = newAV();
46fc3d4c 3525 for (ix = fname; ix >= 0; ix--)
3280af22 3526 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 3527
3280af22 3528 PL_comppad = newAV();
748a9306
LW		 3529
3530 comppadlist = newAV();
3531 AvREAL_off(comppadlist);
3280af22
NIS		 3532 av_store(comppadlist, 0, (SV*)PL_comppad_name);
3533 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 3534 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 3535 av_fill(PL_comppad, AvFILLp(protopad));
3536 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 3537
3538 av = newAV(); /* will be @_ */
3539 av_extend(av, 0);
3280af22 3540 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 3541 AvFLAGS(av) = AVf_REIFY;
3542
9607fc9c 3543 for (ix = fpad; ix > 0; ix--) {
3544 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 3545 if (namesv && namesv != &PL_sv_undef) {
aa689395 3546 char *name = SvPVX(namesv); /* XXX */
3547 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3548 I32 off = pad_findlex(name, ix, SvIVX(namesv),
5f05dabc 3549 CvOUTSIDE(cv), cxstack_ix);
3550 if (!off)
3280af22 3551 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 3552 else if (off != ix)
748a9306
LW		 3553 croak("panic: cv_clone: %s", name);
3554 }
3555 else { /* our own lexical */
aa689395 3556 SV* sv;
5f05dabc 3557 if (*name == '&') {
3558 /* anon code -- we'll come back for it */
3559 sv = SvREFCNT_inc(ppad[ix]);
3560 }
3561 else if (*name == '@')
3562 sv = (SV*)newAV();
748a9306 3563 else if (*name == '%')
5f05dabc 3564 sv = (SV*)newHV();
748a9306 3565 else
5f05dabc 3566 sv = NEWSV(0,0);
3567 if (!SvPADBUSY(sv))
3568 SvPADMY_on(sv);
3280af22 3569 PL_curpad[ix] = sv;