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s/Regexp/re/ and clarify policy on lowercased object namespaces
[perl5.git] / op.c
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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 21#ifdef PERL_OBJECT
22c35a8c 22#define CHECKCALL this->*PL_check
76e3520e 23#else
22c35a8c 24#define CHECKCALL *PL_check
76e3520e
GS		 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), \
22c35a8c 34 croak("%s trapped by operation mask", PL_op_desc[type]), \
28757baa 35 Nullop ) \
76e3520e 36 : (CHECKCALL[type])((OP*)o))
e50aee73 37
c53d7c7d
HS		 38#define PAD_MAX 999999999
39
76e3520e
GS		 40static bool scalar_mod_type _((OP *o, I32 type));
41#ifndef PERL_OBJECT
11343788 42static I32 list_assignment _((OP *o));
3bc5dc61 43static void bad_type _((I32 n, char *t, char *name, OP *kid));
11343788
MB		 44static OP *modkids _((OP *o, I32 type));
45static OP *no_fh_allowed _((OP *o));
46static OP *scalarboolean _((OP *o));
47static OP *too_few_arguments _((OP *o, char* name));
48static OP *too_many_arguments _((OP *o, char* name));
49static void null _((OP* o));
bbce6d69 50static PADOFFSET pad_findlex _((char* name, PADOFFSET newoff, U32 seq,
155fc61f 51 CV* startcv, I32 cx_ix, I32 saweval));
54b9620d 52static OP *newDEFSVOP _((void));
883ffac3 53static OP *new_logop _((I32 type, I32 flags, OP **firstp, OP **otherp));
76e3520e 54#endif
79072805 55
76e3520e 56STATIC char*
8ac85365 57gv_ename(GV *gv)
4633a7c4
LW		 58{
59 SV* tmpsv = sv_newmortal();
46fc3d4c 60 gv_efullname3(tmpsv, gv, Nullch);
3280af22 61 return SvPV(tmpsv,PL_na);
4633a7c4
LW		 62}
63
76e3520e 64STATIC OP *
8ac85365 65no_fh_allowed(OP *o)
79072805 66{
46fc3d4c 67 yyerror(form("Missing comma after first argument to %s function",
22c35a8c 68 PL_op_desc[o->op_type]));
11343788 69 return o;
79072805
LW		 70}
71
76e3520e 72STATIC OP *
8ac85365 73too_few_arguments(OP *o, char *name)
79072805 74{
46fc3d4c 75 yyerror(form("Not enough arguments for %s", name));
11343788 76 return o;
79072805
LW		 77}
78
76e3520e 79STATIC OP *
8ac85365 80too_many_arguments(OP *o, char *name)
79072805 81{
46fc3d4c 82 yyerror(form("Too many arguments for %s", name));
11343788 83 return o;
79072805
LW		 84}
85
76e3520e 86STATIC void
8ac85365 87bad_type(I32 n, char *t, char *name, OP *kid)
8990e307 88{
46fc3d4c 89 yyerror(form("Type of arg %d to %s must be %s (not %s)",
22c35a8c 90 (int)n, name, t, PL_op_desc[kid->op_type]));
8990e307
LW		 91}
92
a0d0e21e 93void
8ac85365 94assertref(OP *o)
a0d0e21e 95{
11343788 96 int type = o->op_type;
136254bc 97 if (type != OP_AELEM && type != OP_HELEM && type != OP_GELEM) {
22c35a8c 98 yyerror(form("Can't use subscript on %s", PL_op_desc[type]));
bde90e66 99 if (type == OP_ENTERSUB || type == OP_RV2HV || type == OP_PADHV) {
9c82454c 100 dTHR;
bde90e66
HS		 101 SV *msg = sv_2mortal(
102 newSVpvf("(Did you mean $ or @ instead of %c?)\n",
103 type == OP_ENTERSUB ? '&' : '%'));
3280af22 104 if (PL_in_eval & 2)
bde90e66 105 warn("%_", msg);
3280af22
NIS		 106 else if (PL_in_eval)
107 sv_catsv(GvSV(PL_errgv), msg);
bde90e66
HS		 108 else
109 PerlIO_write(PerlIO_stderr(), SvPVX(msg), SvCUR(msg));
110 }
a0d0e21e
LW		 111 }
112}
113
79072805
LW		 114/* "register" allocation */
115
116PADOFFSET
8ac85365 117pad_allocmy(char *name)
93a17b20 118{
11343788 119 dTHR;
a0d0e21e
LW		 120 PADOFFSET off;
121 SV *sv;
122
834a4ddd
LW		 123 if (!(
124 isALPHA(name[1]) ||
125 (PL_hints & HINT_UTF8 && (name[1] & 0xc0) == 0xc0) ||
126 name[1] == '_' && (int)strlen(name) > 2))
127 {
46fc3d4c 128 if (!isPRINT(name[1])) {
129 name[3] = '\0';
130 name[2] = toCTRL(name[1]);
131 name[1] = '^';
132 }
a0d0e21e
LW		 133 croak("Can't use global %s in \"my\"",name);
134 }
599cee73 135 if (ckWARN(WARN_UNSAFE) && AvFILLp(PL_comppad_name) >= 0) {
3280af22
NIS		 136 SV **svp = AvARRAY(PL_comppad_name);
137 for (off = AvFILLp(PL_comppad_name); off > PL_comppad_name_floor; off--) {
b1cb66bf 138 if ((sv = svp[off])
3280af22 139 && sv != &PL_sv_undef
c53d7c7d 140 && (SvIVX(sv) == PAD_MAX || SvIVX(sv) == 0)
b1cb66bf 141 && strEQ(name, SvPVX(sv)))
142 {
599cee73 143 warner(WARN_UNSAFE,
9fbbe825 144 "\"my\" variable %s masks earlier declaration in same %s",
c53d7c7d 145 name, (SvIVX(sv) == PAD_MAX ? "scope" : "statement"));
b1cb66bf 146 break;
147 }
148 }
149 }
a0d0e21e
LW		 150 off = pad_alloc(OP_PADSV, SVs_PADMY);
151 sv = NEWSV(1102,0);
93a17b20
LW		 152 sv_upgrade(sv, SVt_PVNV);
153 sv_setpv(sv, name);
3280af22 154 if (PL_in_my_stash) {
c750a3ec
MB		 155 if (*name != '$')
156 croak("Can't declare class for non-scalar %s in \"my\"",name);
157 SvOBJECT_on(sv);
158 (void)SvUPGRADE(sv, SVt_PVMG);
3280af22
NIS		 159 SvSTASH(sv) = (HV*)SvREFCNT_inc(PL_in_my_stash);
160 PL_sv_objcount++;
c750a3ec 161 }
3280af22 162 av_store(PL_comppad_name, off, sv);
c53d7c7d 163 SvNVX(sv) = (double)PAD_MAX;
8990e307 164 SvIVX(sv) = 0; /* Not yet introduced--see newSTATEOP */
3280af22
NIS		 165 if (!PL_min_intro_pending)
166 PL_min_intro_pending = off;
167 PL_max_intro_pending = off;
93a17b20 168 if (*name == '@')
3280af22 169 av_store(PL_comppad, off, (SV*)newAV());
93a17b20 170 else if (*name == '%')
3280af22
NIS		 171 av_store(PL_comppad, off, (SV*)newHV());
172 SvPADMY_on(PL_curpad[off]);
93a17b20
LW		 173 return off;
174}
175
76e3520e 176STATIC PADOFFSET
155fc61f 177pad_findlex(char *name, PADOFFSET newoff, U32 seq, CV* startcv, I32 cx_ix, I32 saweval)
93a17b20 178{
11343788 179 dTHR;
748a9306 180 CV *cv;
93a17b20
LW		 181 I32 off;
182 SV *sv;
93a17b20 183 register I32 i;
c09156bb 184 register PERL_CONTEXT *cx;
93a17b20 185
748a9306 186 for (cv = startcv; cv; cv = CvOUTSIDE(cv)) {
4fdae800 187 AV *curlist = CvPADLIST(cv);
188 SV **svp = av_fetch(curlist, 0, FALSE);
748a9306 189 AV *curname;
4fdae800 190
3280af22 191 if (!svp || *svp == &PL_sv_undef)
4633a7c4 192 continue;
748a9306
LW		 193 curname = (AV*)*svp;
194 svp = AvARRAY(curname);
93965878 195 for (off = AvFILLp(curname); off > 0; off--) {
748a9306 196 if ((sv = svp[off]) &&
3280af22 197 sv != &PL_sv_undef &&
748a9306 198 seq <= SvIVX(sv) &&
13826f2c 199 seq > I_32(SvNVX(sv)) &&
748a9306
LW		 200 strEQ(SvPVX(sv), name))
201 {
5f05dabc 202 I32 depth;
203 AV *oldpad;
204 SV *oldsv;
205
206 depth = CvDEPTH(cv);
207 if (!depth) {
9607fc9c 208 if (newoff) {
209 if (SvFAKE(sv))
210 continue;
4fdae800 211 return 0; /* don't clone from inactive stack frame */
9607fc9c 212 }
5f05dabc 213 depth = 1;
214 }
215 oldpad = (AV*)*av_fetch(curlist, depth, FALSE);
216 oldsv = *av_fetch(oldpad, off, TRUE);
748a9306 217 if (!newoff) { /* Not a mere clone operation. */
9607fc9c 218 SV *namesv = NEWSV(1103,0);
748a9306 219 newoff = pad_alloc(OP_PADSV, SVs_PADMY);
9607fc9c 220 sv_upgrade(namesv, SVt_PVNV);
221 sv_setpv(namesv, name);
3280af22
NIS		 222 av_store(PL_comppad_name, newoff, namesv);
223 SvNVX(namesv) = (double)PL_curcop->cop_seq;
c53d7c7d 224 SvIVX(namesv) = PAD_MAX; /* A ref, intro immediately */
9607fc9c 225 SvFAKE_on(namesv); /* A ref, not a real var */
87671ffc 226 if (SvOBJECT(sv)) { /* A typed var */
3d93dc8b
GS		 227 SvOBJECT_on(namesv);
228 (void)SvUPGRADE(namesv, SVt_PVMG);
87671ffc 229 SvSTASH(namesv) = (HV*)SvREFCNT_inc((SV*)SvSTASH(sv));
3d93dc8b
GS		 230 PL_sv_objcount++;
231 }
3280af22 232 if (CvANON(PL_compcv) || SvTYPE(PL_compcv) == SVt_PVFM) {
28757baa 233 /* "It's closures all the way down." */
3280af22 234 CvCLONE_on(PL_compcv);
54310121 235 if (cv == startcv) {
3280af22 236 if (CvANON(PL_compcv))
54310121 237 oldsv = Nullsv; /* no need to keep ref */
238 }
239 else {
28757baa 240 CV *bcv;
241 for (bcv = startcv;
242 bcv && bcv != cv && !CvCLONE(bcv);
6b35e009
GS		 243 bcv = CvOUTSIDE(bcv))
244 {
28757baa 245 if (CvANON(bcv))
246 CvCLONE_on(bcv);
247 else {
6b35e009
GS		 248 if (ckWARN(WARN_CLOSURE)
249 && !CvUNIQUE(bcv) && !CvUNIQUE(cv))
250 {
599cee73 251 warner(WARN_CLOSURE,
44a8e56a 252 "Variable \"%s\" may be unavailable",
28757baa 253 name);
6b35e009 254 }
28757baa 255 break;
256 }
257 }
258 }
259 }
3280af22 260 else if (!CvUNIQUE(PL_compcv)) {
599cee73
PM		 261 if (ckWARN(WARN_CLOSURE) && !SvFAKE(sv) && !CvUNIQUE(cv))
262 warner(WARN_CLOSURE,
263 "Variable \"%s\" will not stay shared", name);
5f05dabc 264 }
748a9306 265 }
3280af22 266 av_store(PL_comppad, newoff, SvREFCNT_inc(oldsv));
748a9306
LW		 267 return newoff;
268 }
93a17b20
LW		 269 }
270 }
271
272 /* Nothing in current lexical context--try eval's context, if any.
273 * This is necessary to let the perldb get at lexically scoped variables.
274 * XXX This will also probably interact badly with eval tree caching.
275 */
276
748a9306 277 for (i = cx_ix; i >= 0; i--) {
93a17b20 278 cx = &cxstack[i];
6b35e009 279 switch (CxTYPE(cx)) {
93a17b20 280 default:
748a9306
LW		 281 if (i == 0 && saweval) {
282 seq = cxstack[saweval].blk_oldcop->cop_seq;
155fc61f 283 return pad_findlex(name, newoff, seq, PL_main_cv, -1, saweval);
748a9306 284 }
93a17b20
LW		 285 break;
286 case CXt_EVAL:
44a8e56a 287 switch (cx->blk_eval.old_op_type) {
288 case OP_ENTEREVAL:
6b35e009
GS		 289 if (CxREALEVAL(cx))
290 saweval = i;
44a8e56a 291 break;
292 case OP_REQUIRE:
293 /* require must have its own scope */
294 return 0;
295 }
93a17b20
LW		 296 break;
297 case CXt_SUB:
298 if (!saweval)
299 return 0;
300 cv = cx->blk_sub.cv;
3280af22 301 if (PL_debstash && CvSTASH(cv) == PL_debstash) { /* ignore DB'* scope */
748a9306 302 saweval = i; /* so we know where we were called from */
93a17b20 303 continue;
93a17b20 304 }
748a9306 305 seq = cxstack[saweval].blk_oldcop->cop_seq;
155fc61f 306 return pad_findlex(name, newoff, seq, cv, i-1, saweval);
93a17b20
LW		 307 }
308 }
309
748a9306
LW		 310 return 0;
311}
a0d0e21e 312
748a9306 313PADOFFSET
8ac85365 314pad_findmy(char *name)
748a9306 315{
11343788 316 dTHR;
748a9306 317 I32 off;
54310121 318 I32 pendoff = 0;
748a9306 319 SV *sv;
3280af22
NIS		 320 SV **svp = AvARRAY(PL_comppad_name);
321 U32 seq = PL_cop_seqmax;
6b35e009 322 PERL_CONTEXT *cx;
33b8ce05 323 CV *outside;
748a9306 324
11343788
MB		 325#ifdef USE_THREADS
326 /*
327 * Special case to get lexical (and hence per-thread) @_.
328 * XXX I need to find out how to tell at parse-time whether use
329 * of @_ should refer to a lexical (from a sub) or defgv (global
330 * scope and maybe weird sub-ish things like formats). See
331 * startsub in perly.y. It's possible that @_ could be lexical
332 * (at least from subs) even in non-threaded perl.
333 */
334 if (strEQ(name, "@_"))
335 return 0; /* success. (NOT_IN_PAD indicates failure) */
336#endif /* USE_THREADS */
337
748a9306 338 /* The one we're looking for is probably just before comppad_name_fill. */
3280af22 339 for (off = AvFILLp(PL_comppad_name); off > 0; off--) {
a0d0e21e 340 if ((sv = svp[off]) &&
3280af22 341 sv != &PL_sv_undef &&
54310121 342 (!SvIVX(sv) ||
343 (seq <= SvIVX(sv) &&
344 seq > I_32(SvNVX(sv)))) &&
a0d0e21e
LW		 345 strEQ(SvPVX(sv), name))
346 {
54310121 347 if (SvIVX(sv))
348 return (PADOFFSET)off;
349 pendoff = off; /* this pending def. will override import */
a0d0e21e
LW		 350 }
351 }
748a9306 352
33b8ce05
GS		 353 outside = CvOUTSIDE(PL_compcv);
354
355 /* Check if if we're compiling an eval'', and adjust seq to be the
356 * eval's seq number. This depends on eval'' having a non-null
357 * CvOUTSIDE() while it is being compiled. The eval'' itself is
358 * identified by CvUNIQUE being set and CvGV being null. */
359 if (outside && CvUNIQUE(PL_compcv) && !CvGV(PL_compcv) && cxstack_ix >= 0) {
6b35e009
GS		 360 cx = &cxstack[cxstack_ix];
361 if (CxREALEVAL(cx))
362 seq = cx->blk_oldcop->cop_seq;
363 }
364
748a9306 365 /* See if it's in a nested scope */
33b8ce05 366 off = pad_findlex(name, 0, seq, outside, cxstack_ix, 0);
54310121 367 if (off) {
368 /* If there is a pending local definition, this new alias must die */
369 if (pendoff)
3280af22 370 SvIVX(AvARRAY(PL_comppad_name)[off]) = seq;
11343788 371 return off; /* pad_findlex returns 0 for failure...*/
54310121 372 }
11343788 373 return NOT_IN_PAD; /* ...but we return NOT_IN_PAD for failure */
93a17b20
LW		 374}
375
376void
8ac85365 377pad_leavemy(I32 fill)
93a17b20
LW		 378{
379 I32 off;
3280af22 380 SV **svp = AvARRAY(PL_comppad_name);
93a17b20 381 SV *sv;
3280af22
NIS		 382 if (PL_min_intro_pending && fill < PL_min_intro_pending) {
383 for (off = PL_max_intro_pending; off >= PL_min_intro_pending; off--) {
384 if ((sv = svp[off]) && sv != &PL_sv_undef)
8990e307
LW		 385 warn("%s never introduced", SvPVX(sv));
386 }
387 }
388 /* "Deintroduce" my variables that are leaving with this scope. */
3280af22 389 for (off = AvFILLp(PL_comppad_name); off > fill; off--) {
c53d7c7d 390 if ((sv = svp[off]) && sv != &PL_sv_undef && SvIVX(sv) == PAD_MAX)
3280af22 391 SvIVX(sv) = PL_cop_seqmax;
93a17b20
LW		 392 }
393}
394
395PADOFFSET
8ac85365 396pad_alloc(I32 optype, U32 tmptype)
79072805 397{
11343788 398 dTHR;
79072805
LW		 399 SV *sv;
400 I32 retval;
401
3280af22 402 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 403 croak("panic: pad_alloc");
3280af22 404 if (PL_pad_reset_pending)
a0d0e21e 405 pad_reset();
ed6116ce 406 if (tmptype & SVs_PADMY) {
79072805 407 do {
3280af22 408 sv = *av_fetch(PL_comppad, AvFILLp(PL_comppad) + 1, TRUE);
ed6116ce 409 } while (SvPADBUSY(sv)); /* need a fresh one */
3280af22 410 retval = AvFILLp(PL_comppad);
79072805
LW		 411 }
412 else {
3280af22
NIS		 413 SV **names = AvARRAY(PL_comppad_name);
414 SSize_t names_fill = AvFILLp(PL_comppad_name);
bbce6d69 415 for (;;) {
416 /*
417 * "foreach" index vars temporarily become aliases to non-"my"
418 * values. Thus we must skip, not just pad values that are
419 * marked as current pad values, but also those with names.
420 */
3280af22
NIS		 421 if (++PL_padix <= names_fill &&
422 (sv = names[PL_padix]) && sv != &PL_sv_undef)
bbce6d69 423 continue;
3280af22 424 sv = *av_fetch(PL_comppad, PL_padix, TRUE);
bbce6d69 425 if (!(SvFLAGS(sv) & (SVs_PADTMP|SVs_PADMY)))
426 break;
427 }
3280af22 428 retval = PL_padix;
79072805 429 }
8990e307 430 SvFLAGS(sv) |= tmptype;
3280af22 431 PL_curpad = AvARRAY(PL_comppad);
11343788 432#ifdef USE_THREADS
5dc0d613 433 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx alloc %ld for %s\n",
533c011a 434 (unsigned long) thr, (unsigned long) PL_curpad,
22c35a8c 435 (long) retval, PL_op_name[optype]));
11343788 436#else
d9bb4600 437 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx alloc %ld for %s\n",
3280af22 438 (unsigned long) PL_curpad,
22c35a8c 439 (long) retval, PL_op_name[optype]));
11343788 440#endif /* USE_THREADS */
79072805
LW		 441 return (PADOFFSET)retval;
442}
443
444SV *
8990e307 445pad_sv(PADOFFSET po)
79072805 446{
11343788
MB		 447 dTHR;
448#ifdef USE_THREADS
5dc0d613 449 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx sv %d\n",
533c011a 450 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 451#else
79072805 452 if (!po)
463ee0b2 453 croak("panic: pad_sv po");
d9bb4600 454 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx sv %d\n",
3280af22 455 (unsigned long) PL_curpad, po));
11343788 456#endif /* USE_THREADS */
3280af22 457 return PL_curpad[po]; /* eventually we'll turn this into a macro */
79072805
LW		 458}
459
460void
8990e307 461pad_free(PADOFFSET po)
79072805 462{
11343788 463 dTHR;
3280af22 464 if (!PL_curpad)
a0d0e21e 465 return;
3280af22 466 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 467 croak("panic: pad_free curpad");
79072805 468 if (!po)
463ee0b2 469 croak("panic: pad_free po");
11343788 470#ifdef USE_THREADS
5dc0d613 471 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx free %d\n",
533c011a 472 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 473#else
d9bb4600 474 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx free %d\n",
3280af22 475 (unsigned long) PL_curpad, po));
11343788 476#endif /* USE_THREADS */
3280af22
NIS		 477 if (PL_curpad[po] && PL_curpad[po] != &PL_sv_undef)
478 SvPADTMP_off(PL_curpad[po]);
479 if ((I32)po < PL_padix)
480 PL_padix = po - 1;
79072805
LW		 481}
482
483void
8990e307 484pad_swipe(PADOFFSET po)
79072805 485{
11343788 486 dTHR;
3280af22 487 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 488 croak("panic: pad_swipe curpad");
79072805 489 if (!po)
463ee0b2 490 croak("panic: pad_swipe po");
11343788 491#ifdef USE_THREADS
5dc0d613 492 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx swipe %d\n",
533c011a 493 (unsigned long) thr, (unsigned long) PL_curpad, po));
11343788 494#else
d9bb4600 495 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx swipe %d\n",
3280af22 496 (unsigned long) PL_curpad, po));
11343788 497#endif /* USE_THREADS */
3280af22
NIS		 498 SvPADTMP_off(PL_curpad[po]);
499 PL_curpad[po] = NEWSV(1107,0);
500 SvPADTMP_on(PL_curpad[po]);
501 if ((I32)po < PL_padix)
502 PL_padix = po - 1;
79072805
LW		 503}
504
d9bb4600
GS		 505/* XXX pad_reset() is currently disabled because it results in serious bugs.
506 * It causes pad temp TARGs to be shared between OPs. Since TARGs are pushed
507 * on the stack by OPs that use them, there are several ways to get an alias
508 * to a shared TARG. Such an alias will change randomly and unpredictably.
509 * We avoid doing this until we can think of a Better Way.
510 * GSAR 97-10-29 */
79072805 511void
8ac85365 512pad_reset(void)
79072805 513{
d9bb4600 514#ifdef USE_BROKEN_PAD_RESET
11343788 515 dTHR;
79072805
LW		 516 register I32 po;
517
6b88bc9c 518 if (AvARRAY(PL_comppad) != PL_curpad)
463ee0b2 519 croak("panic: pad_reset curpad");
11343788 520#ifdef USE_THREADS
5dc0d613 521 DEBUG_X(PerlIO_printf(Perl_debug_log, "0x%lx Pad 0x%lx reset\n",
6b88bc9c 522 (unsigned long) thr, (unsigned long) PL_curpad));
11343788 523#else
d9bb4600 524 DEBUG_X(PerlIO_printf(Perl_debug_log, "Pad 0x%lx reset\n",
6b88bc9c 525 (unsigned long) PL_curpad));
11343788 526#endif /* USE_THREADS */
6b88bc9c
GS		 527 if (!PL_tainting) { /* Can't mix tainted and non-tainted temporaries. */
528 for (po = AvMAX(PL_comppad); po > PL_padix_floor; po--) {
529 if (PL_curpad[po] && !SvIMMORTAL(PL_curpad[po]))
530 SvPADTMP_off(PL_curpad[po]);
748a9306 531 }
6b88bc9c 532 PL_padix = PL_padix_floor;
79072805 533 }
d9bb4600 534#endif
3280af22 535 PL_pad_reset_pending = FALSE;
79072805
LW		 536}
537
a863c7d1 538#ifdef USE_THREADS
54b9620d 539/* find_threadsv is not reentrant */
a863c7d1 540PADOFFSET
54b9620d 541find_threadsv(char *name)
a863c7d1
MB		 542{
543 dTHR;
544 char *p;
545 PADOFFSET key;
554b3eca 546 SV **svp;
54b9620d 547 /* We currently only handle names of a single character */
533c011a 548 p = strchr(PL_threadsv_names, *name);
a863c7d1
MB		 549 if (!p)
550 return NOT_IN_PAD;
533c011a 551 key = p - PL_threadsv_names;
54b9620d 552 svp = av_fetch(thr->threadsv, key, FALSE);
554b3eca
MB		 553 if (!svp) {
554 SV *sv = NEWSV(0, 0);
54b9620d 555 av_store(thr->threadsv, key, sv);
940cb80d 556 thr->threadsvp = AvARRAY(thr->threadsv);
554b3eca
MB		 557 /*
558 * Some magic variables used to be automagically initialised
559 * in gv_fetchpv. Those which are now per-thread magicals get
560 * initialised here instead.
561 */
562 switch (*name) {
54b9620d
MB		 563 case '_':
564 break;
554b3eca
MB		 565 case ';':
566 sv_setpv(sv, "\034");
54b9620d 567 sv_magic(sv, 0, 0, name, 1);
554b3eca 568 break;
c277df42
IZ		 569 case '&':
570 case '`':
571 case '\'':
533c011a 572 PL_sawampersand = TRUE;
c277df42 573 SvREADONLY_on(sv);
d8b5173a 574 /* FALL THROUGH */
067391ea
GS		 575
576 /* XXX %! tied to Errno.pm needs to be added here.
577 * See gv_fetchpv(). */
578 /* case '!': */
579
54b9620d
MB		 580 default:
581 sv_magic(sv, 0, 0, name, 1);
554b3eca 582 }
8b73bbec 583 DEBUG_S(PerlIO_printf(PerlIO_stderr(),
54b9620d 584 "find_threadsv: new SV %p for $%s%c\n",
554b3eca
MB		 585 sv, (*name < 32) ? "^" : "",
586 (*name < 32) ? toCTRL(*name) : *name));
a863c7d1
MB		 587 }
588 return key;
589}
590#endif /* USE_THREADS */
591
79072805
LW		 592/* Destructor */
593
594void
8ac85365 595op_free(OP *o)
79072805 596{
85e6fe83 597 register OP *kid, *nextkid;
79072805 598
5dc0d613 599 if (!o || o->op_seq == (U16)-1)
79072805
LW		 600 return;
601
11343788
MB		 602 if (o->op_flags & OPf_KIDS) {
603 for (kid = cUNOPo->op_first; kid; kid = nextkid) {
85e6fe83 604 nextkid = kid->op_sibling; /* Get before next freeing kid */
79072805 605 op_free(kid);
85e6fe83 606 }
79072805
LW		 607 }
608
11343788 609 switch (o->op_type) {
8990e307 610 case OP_NULL:
11343788 611 o->op_targ = 0; /* Was holding old type, if any. */
8990e307 612 break;
a0d0e21e 613 case OP_ENTEREVAL:
11343788 614 o->op_targ = 0; /* Was holding hints. */
a0d0e21e 615 break;
554b3eca 616#ifdef USE_THREADS
8dd3ba40
SM		 617 case OP_ENTERITER:
618 if (!(o->op_flags & OPf_SPECIAL))
619 break;
620 /* FALL THROUGH */
2faa37cc 621 case OP_THREADSV:
54b9620d 622 o->op_targ = 0; /* Was holding index into thr->threadsv AV. */
554b3eca
MB		 623 break;
624#endif /* USE_THREADS */
a6006777 625 default:
ac4c12e7 626 if (!(o->op_flags & OPf_REF)
22c35a8c 627 || (PL_check[o->op_type] != FUNC_NAME_TO_PTR(ck_ftst)))
a6006777 628 break;
629 /* FALL THROUGH */
463ee0b2 630 case OP_GVSV:
79072805 631 case OP_GV:
a6006777 632 case OP_AELEMFAST:
11343788 633 SvREFCNT_dec(cGVOPo->op_gv);
8990e307
LW		 634 break;
635 case OP_NEXTSTATE:
636 case OP_DBSTATE:
5196be3e 637 Safefree(cCOPo->cop_label);
11343788 638 SvREFCNT_dec(cCOPo->cop_filegv);
599cee73
PM		 639 if (cCOPo->cop_warnings != WARN_NONE && cCOPo->cop_warnings != WARN_ALL)
640 SvREFCNT_dec(cCOPo->cop_warnings);
79072805
LW		 641 break;
642 case OP_CONST:
11343788 643 SvREFCNT_dec(cSVOPo->op_sv);
79072805 644 break;
748a9306
LW		 645 case OP_GOTO:
646 case OP_NEXT:
647 case OP_LAST:
648 case OP_REDO:
11343788 649 if (o->op_flags & (OPf_SPECIAL|OPf_STACKED|OPf_KIDS))
748a9306
LW		 650 break;
651 /* FALL THROUGH */
a0d0e21e 652 case OP_TRANS:
a0ed51b3
LW		 653 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF))
654 SvREFCNT_dec(cSVOPo->op_sv);
655 else
656 Safefree(cPVOPo->op_pv);
a0d0e21e
LW		 657 break;
658 case OP_SUBST:
11343788 659 op_free(cPMOPo->op_pmreplroot);
a0d0e21e 660 /* FALL THROUGH */
748a9306 661 case OP_PUSHRE:
a0d0e21e 662 case OP_MATCH:
8782bef2 663 case OP_QR:
c277df42 664 ReREFCNT_dec(cPMOPo->op_pmregexp);
a0d0e21e 665 break;
79072805
LW		 666 }
667
11343788
MB		 668 if (o->op_targ > 0)
669 pad_free(o->op_targ);
8990e307 670
11343788 671 Safefree(o);
79072805
LW		 672}
673
76e3520e 674STATIC void
8ac85365 675null(OP *o)
8990e307 676{
54b9620d 677 if (o->op_type != OP_NULL && o->op_type != OP_THREADSV && o->op_targ > 0)
11343788
MB		 678 pad_free(o->op_targ);
679 o->op_targ = o->op_type;
680 o->op_type = OP_NULL;
22c35a8c 681 o->op_ppaddr = PL_ppaddr[OP_NULL];
8990e307
LW		 682}
683
79072805
LW		 684/* Contextualizers */
685
463ee0b2 686#define LINKLIST(o) ((o)->op_next ? (o)->op_next : linklist((OP*)o))
79072805
LW		 687
688OP *
8ac85365 689linklist(OP *o)
79072805
LW		 690{
691 register OP *kid;
692
11343788
MB		 693 if (o->op_next)
694 return o->op_next;
79072805
LW		 695
696 /* establish postfix order */
11343788
MB		 697 if (cUNOPo->op_first) {
698 o->op_next = LINKLIST(cUNOPo->op_first);
699 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 700 if (kid->op_sibling)
701 kid->op_next = LINKLIST(kid->op_sibling);
702 else
11343788 703 kid->op_next = o;
79072805
LW		 704 }
705 }
706 else
11343788 707 o->op_next = o;
79072805 708
11343788 709 return o->op_next;
79072805
LW		 710}
711
712OP *
8ac85365 713scalarkids(OP *o)
79072805
LW		 714{
715 OP *kid;
11343788
MB		 716 if (o && o->op_flags & OPf_KIDS) {
717 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 718 scalar(kid);
719 }
11343788 720 return o;
79072805
LW		 721}
722
76e3520e 723STATIC OP *
8ac85365 724scalarboolean(OP *o)
8990e307 725{
d008e5eb 726 if (o->op_type == OP_SASSIGN && cBINOPo->op_first->op_type == OP_CONST) {
0f15f207 727 dTHR;
d008e5eb
GS		 728 if (ckWARN(WARN_SYNTAX)) {
729 line_t oldline = PL_curcop->cop_line;
a0d0e21e 730
d008e5eb
GS		 731 if (PL_copline != NOLINE)
732 PL_curcop->cop_line = PL_copline;
733 warner(WARN_SYNTAX, "Found = in conditional, should be ==");
734 PL_curcop->cop_line = oldline;
735 }
a0d0e21e 736 }
11343788 737 return scalar(o);
8990e307
LW		 738}
739
740OP *
8ac85365 741scalar(OP *o)
79072805
LW		 742{
743 OP *kid;
744
a0d0e21e 745 /* assumes no premature commitment */
3280af22 746 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 747 || o->op_type == OP_RETURN)
11343788 748 return o;
79072805 749
5dc0d613 750 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_SCALAR;
79072805 751
11343788 752 switch (o->op_type) {
79072805 753 case OP_REPEAT:
11343788
MB		 754 if (o->op_private & OPpREPEAT_DOLIST)
755 null(((LISTOP*)cBINOPo->op_first)->op_first);
756 scalar(cBINOPo->op_first);
8990e307 757 break;
79072805
LW		 758 case OP_OR:
759 case OP_AND:
760 case OP_COND_EXPR:
11343788 761 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
8990e307 762 scalar(kid);
79072805 763 break;
a0d0e21e 764 case OP_SPLIT:
11343788 765 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 766 if (!kPMOP->op_pmreplroot)
767 deprecate("implicit split to @_");
768 }
769 /* FALL THROUGH */
79072805 770 case OP_MATCH:
8782bef2 771 case OP_QR:
79072805
LW		 772 case OP_SUBST:
773 case OP_NULL:
8990e307 774 default:
11343788
MB		 775 if (o->op_flags & OPf_KIDS) {
776 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling)
8990e307
LW		 777 scalar(kid);
778 }
79072805
LW		 779 break;
780 case OP_LEAVE:
781 case OP_LEAVETRY:
5dc0d613 782 kid = cLISTOPo->op_first;
54310121 783 scalar(kid);
784 while (kid = kid->op_sibling) {
785 if (kid->op_sibling)
786 scalarvoid(kid);
787 else
788 scalar(kid);
789 }
3280af22 790 WITH_THR(PL_curcop = &PL_compiling);
54310121 791 break;
748a9306 792 case OP_SCOPE:
79072805 793 case OP_LINESEQ:
8990e307 794 case OP_LIST:
11343788 795 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 796 if (kid->op_sibling)
797 scalarvoid(kid);
798 else
799 scalar(kid);
800 }
3280af22 801 WITH_THR(PL_curcop = &PL_compiling);
79072805
LW		 802 break;
803 }
11343788 804 return o;
79072805
LW		 805}
806
807OP *
8ac85365 808scalarvoid(OP *o)
79072805
LW		 809{
810 OP *kid;
8990e307
LW		 811 char* useless = 0;
812 SV* sv;
79072805 813
54310121 814 /* assumes no premature commitment */
3280af22 815 if (!o || (o->op_flags & OPf_WANT) == OPf_WANT_LIST || PL_error_count
5dc0d613 816 || o->op_type == OP_RETURN)
11343788 817 return o;
79072805 818
5dc0d613 819 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_VOID;
79072805 820
11343788 821 switch (o->op_type) {
79072805 822 default:
22c35a8c 823 if (!(PL_opargs[o->op_type] & OA_FOLDCONST))
8990e307 824 break;
36477c24 825 /* FALL THROUGH */
826 case OP_REPEAT:
11343788 827 if (o->op_flags & OPf_STACKED)
8990e307 828 break;
5d82c453
GA		 829 goto func_ops;
830 case OP_SUBSTR:
831 if (o->op_private == 4)
832 break;
8990e307
LW		 833 /* FALL THROUGH */
834 case OP_GVSV:
835 case OP_WANTARRAY:
836 case OP_GV:
837 case OP_PADSV:
838 case OP_PADAV:
839 case OP_PADHV:
840 case OP_PADANY:
841 case OP_AV2ARYLEN:
8990e307 842 case OP_REF:
a0d0e21e
LW		 843 case OP_REFGEN:
844 case OP_SREFGEN:
8990e307
LW		 845 case OP_DEFINED:
846 case OP_HEX:
847 case OP_OCT:
848 case OP_LENGTH:
8990e307
LW		 849 case OP_VEC:
850 case OP_INDEX:
851 case OP_RINDEX:
852 case OP_SPRINTF:
853 case OP_AELEM:
854 case OP_AELEMFAST:
855 case OP_ASLICE:
8990e307
LW		 856 case OP_HELEM:
857 case OP_HSLICE:
858 case OP_UNPACK:
859 case OP_PACK:
8990e307
LW		 860 case OP_JOIN:
861 case OP_LSLICE:
862 case OP_ANONLIST:
863 case OP_ANONHASH:
864 case OP_SORT:
865 case OP_REVERSE:
866 case OP_RANGE:
867 case OP_FLIP:
868 case OP_FLOP:
869 case OP_CALLER:
870 case OP_FILENO:
871 case OP_EOF:
872 case OP_TELL:
873 case OP_GETSOCKNAME:
874 case OP_GETPEERNAME:
875 case OP_READLINK:
876 case OP_TELLDIR:
877 case OP_GETPPID:
878 case OP_GETPGRP:
879 case OP_GETPRIORITY:
880 case OP_TIME:
881 case OP_TMS:
882 case OP_LOCALTIME:
883 case OP_GMTIME:
884 case OP_GHBYNAME:
885 case OP_GHBYADDR:
886 case OP_GHOSTENT:
887 case OP_GNBYNAME:
888 case OP_GNBYADDR:
889 case OP_GNETENT:
890 case OP_GPBYNAME:
891 case OP_GPBYNUMBER:
892 case OP_GPROTOENT:
893 case OP_GSBYNAME:
894 case OP_GSBYPORT:
895 case OP_GSERVENT:
896 case OP_GPWNAM:
897 case OP_GPWUID:
898 case OP_GGRNAM:
899 case OP_GGRGID:
900 case OP_GETLOGIN:
5d82c453 901 func_ops:
11343788 902 if (!(o->op_private & OPpLVAL_INTRO))
22c35a8c 903 useless = PL_op_desc[o->op_type];
8990e307
LW		 904 break;
905
906 case OP_RV2GV:
907 case OP_RV2SV:
908 case OP_RV2AV:
909 case OP_RV2HV:
11343788
MB		 910 if (!(o->op_private & OPpLVAL_INTRO) &&
911 (!o->op_sibling || o->op_sibling->op_type != OP_READLINE))
8990e307
LW		 912 useless = "a variable";
913 break;
79072805 914
93a17b20 915 case OP_NEXTSTATE:
8990e307 916 case OP_DBSTATE:
3280af22 917 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
93a17b20
LW		 918 break;
919
79072805 920 case OP_CONST:
11343788 921 sv = cSVOPo->op_sv;
d008e5eb
GS		 922 {
923 dTHR;
924 if (ckWARN(WARN_VOID)) {
925 useless = "a constant";
926 if (SvNIOK(sv) && (SvNV(sv) == 0.0 || SvNV(sv) == 1.0))
927 useless = 0;
928 else if (SvPOK(sv)) {
929 if (strnEQ(SvPVX(sv), "di", 2) ||
930 strnEQ(SvPVX(sv), "ds", 2) ||
931 strnEQ(SvPVX(sv), "ig", 2))
932 useless = 0;
933 }
8990e307
LW		 934 }
935 }
11343788 936 null(o); /* don't execute a constant */
8990e307 937 SvREFCNT_dec(sv); /* don't even remember it */
79072805
LW		 938 break;
939
940 case OP_POSTINC:
11343788 941 o->op_type = OP_PREINC; /* pre-increment is faster */
22c35a8c 942 o->op_ppaddr = PL_ppaddr[OP_PREINC];
79072805
LW		 943 break;
944
945 case OP_POSTDEC:
11343788 946 o->op_type = OP_PREDEC; /* pre-decrement is faster */
22c35a8c 947 o->op_ppaddr = PL_ppaddr[OP_PREDEC];
79072805
LW		 948 break;
949
79072805
LW		 950 case OP_OR:
951 case OP_AND:
952 case OP_COND_EXPR:
11343788 953 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 954 scalarvoid(kid);
955 break;
5aabfad6 956
a0d0e21e 957 case OP_NULL:
11343788 958 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
3280af22 959 WITH_THR(PL_curcop = ((COP*)o)); /* for warning below */
11343788 960 if (o->op_flags & OPf_STACKED)
a0d0e21e 961 break;
5aabfad6 962 /* FALL THROUGH */
79072805
LW		 963 case OP_ENTERTRY:
964 case OP_ENTER:
965 case OP_SCALAR:
11343788 966 if (!(o->op_flags & OPf_KIDS))
79072805 967 break;
54310121 968 /* FALL THROUGH */
463ee0b2 969 case OP_SCOPE:
79072805
LW		 970 case OP_LEAVE:
971 case OP_LEAVETRY:
a0d0e21e 972 case OP_LEAVELOOP:
79072805 973 case OP_LINESEQ:
79072805 974 case OP_LIST:
11343788 975 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 976 scalarvoid(kid);
977 break;
c90c0ff4 978 case OP_ENTEREVAL:
5196be3e 979 scalarkids(o);
c90c0ff4 980 break;
5aabfad6 981 case OP_REQUIRE:
c90c0ff4 982 /* all requires must return a boolean value */
5196be3e
MB		 983 o->op_flags &= ~OPf_WANT;
984 return scalar(o);
a0d0e21e 985 case OP_SPLIT:
11343788 986 if ((kid = cLISTOPo->op_first) && kid->op_type == OP_PUSHRE) {
a0d0e21e
LW		 987 if (!kPMOP->op_pmreplroot)
988 deprecate("implicit split to @_");
989 }
990 break;
79072805 991 }
d008e5eb
GS		 992 if (useless) {
993 dTHR;
994 if (ckWARN(WARN_VOID))
995 warner(WARN_VOID, "Useless use of %s in void context", useless);
996 }
11343788 997 return o;
79072805
LW		 998}
999
1000OP *
8ac85365 1001listkids(OP *o)
79072805
LW		 1002{
1003 OP *kid;
11343788
MB		 1004 if (o && o->op_flags & OPf_KIDS) {
1005 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805
LW		 1006 list(kid);
1007 }
11343788 1008 return o;
79072805
LW		 1009}
1010
1011OP *
8ac85365 1012list(OP *o)
79072805
LW		 1013{
1014 OP *kid;
1015
a0d0e21e 1016 /* assumes no premature commitment */
3280af22 1017 if (!o || (o->op_flags & OPf_WANT) || PL_error_count
5dc0d613 1018 || o->op_type == OP_RETURN)
11343788 1019 return o;
79072805 1020
5dc0d613 1021 o->op_flags = (o->op_flags & ~OPf_WANT) | OPf_WANT_LIST;
79072805 1022
11343788 1023 switch (o->op_type) {
79072805
LW		 1024 case OP_FLOP:
1025 case OP_REPEAT:
11343788 1026 list(cBINOPo->op_first);
79072805
LW		 1027 break;
1028 case OP_OR:
1029 case OP_AND:
1030 case OP_COND_EXPR:
11343788 1031 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
79072805
LW		 1032 list(kid);
1033 break;
1034 default:
1035 case OP_MATCH:
8782bef2 1036 case OP_QR:
79072805
LW		 1037 case OP_SUBST:
1038 case OP_NULL:
11343788 1039 if (!(o->op_flags & OPf_KIDS))
79072805 1040 break;
11343788
MB		 1041 if (!o->op_next && cUNOPo->op_first->op_type == OP_FLOP) {
1042 list(cBINOPo->op_first);
1043 return gen_constant_list(o);
79072805
LW		 1044 }
1045 case OP_LIST:
11343788 1046 listkids(o);
79072805
LW		 1047 break;
1048 case OP_LEAVE:
1049 case OP_LEAVETRY:
5dc0d613 1050 kid = cLISTOPo->op_first;
54310121 1051 list(kid);
1052 while (kid = kid->op_sibling) {
1053 if (kid->op_sibling)
1054 scalarvoid(kid);
1055 else
1056 list(kid);
1057 }
3280af22 1058 WITH_THR(PL_curcop = &PL_compiling);
54310121 1059 break;
748a9306 1060 case OP_SCOPE:
79072805 1061 case OP_LINESEQ:
11343788 1062 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
79072805
LW		 1063 if (kid->op_sibling)
1064 scalarvoid(kid);
1065 else
1066 list(kid);
1067 }
3280af22 1068 WITH_THR(PL_curcop = &PL_compiling);
79072805 1069 break;
c90c0ff4 1070 case OP_REQUIRE:
1071 /* all requires must return a boolean value */
5196be3e
MB		 1072 o->op_flags &= ~OPf_WANT;
1073 return scalar(o);
79072805 1074 }
11343788 1075 return o;
79072805
LW		 1076}
1077
1078OP *
8ac85365 1079scalarseq(OP *o)
79072805
LW		 1080{
1081 OP *kid;
1082
11343788
MB		 1083 if (o) {
1084 if (o->op_type == OP_LINESEQ ||
1085 o->op_type == OP_SCOPE ||
1086 o->op_type == OP_LEAVE ||
1087 o->op_type == OP_LEAVETRY)
463ee0b2 1088 {
0f15f207 1089 dTHR;
11343788 1090 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling) {
ed6116ce 1091 if (kid->op_sibling) {
463ee0b2 1092 scalarvoid(kid);
ed6116ce 1093 }
463ee0b2 1094 }
3280af22 1095 PL_curcop = &PL_compiling;
79072805 1096 }
11343788 1097 o->op_flags &= ~OPf_PARENS;
3280af22 1098 if (PL_hints & HINT_BLOCK_SCOPE)
11343788 1099 o->op_flags |= OPf_PARENS;
79072805 1100 }
8990e307 1101 else
11343788
MB		 1102 o = newOP(OP_STUB, 0);
1103 return o;
79072805
LW		 1104}
1105
76e3520e 1106STATIC OP *
8ac85365 1107modkids(OP *o, I32 type)
79072805
LW		 1108{
1109 OP *kid;
11343788
MB		 1110 if (o && o->op_flags & OPf_KIDS) {
1111 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2 1112 mod(kid, type);
79072805 1113 }
11343788 1114 return o;
79072805
LW		 1115}
1116
79072805 1117OP *
8ac85365 1118mod(OP *o, I32 type)
79072805 1119{
11343788 1120 dTHR;
79072805
LW		 1121 OP *kid;
1122 SV *sv;
1123
3280af22 1124 if (!o || PL_error_count)
11343788 1125 return o;
79072805 1126
11343788 1127 switch (o->op_type) {
68dc0745 1128 case OP_UNDEF:
3280af22 1129 PL_modcount++;
5dc0d613 1130 return o;
a0d0e21e 1131 case OP_CONST:
11343788 1132 if (!(o->op_private & (OPpCONST_ARYBASE)))
a0d0e21e 1133 goto nomod;
3280af22
NIS		 1134 if (PL_eval_start && PL_eval_start->op_type == OP_CONST) {
1135 PL_compiling.cop_arybase = (I32)SvIV(((SVOP*)PL_eval_start)->op_sv);
1136 PL_eval_start = 0;
a0d0e21e
LW		 1137 }
1138 else if (!type) {
3280af22
NIS		 1139 SAVEI32(PL_compiling.cop_arybase);
1140 PL_compiling.cop_arybase = 0;
a0d0e21e
LW		 1141 }
1142 else if (type == OP_REFGEN)
1143 goto nomod;
1144 else
1145 croak("That use of $[ is unsupported");
1146 break;
5f05dabc 1147 case OP_STUB:
5196be3e 1148 if (o->op_flags & OPf_PARENS)
5f05dabc 1149 break;
1150 goto nomod;
a0d0e21e
LW		 1151 case OP_ENTERSUB:
1152 if ((type == OP_UNDEF || type == OP_REFGEN) &&
11343788
MB		 1153 !(o->op_flags & OPf_STACKED)) {
1154 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1155 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1156 assert(cUNOPo->op_first->op_type == OP_NULL);
1157 null(((LISTOP*)cUNOPo->op_first)->op_first);/* disable pushmark */
79072805
LW		 1158 break;
1159 }
1160 /* FALL THROUGH */
1161 default:
a0d0e21e
LW		 1162 nomod:
1163 /* grep, foreach, subcalls, refgen */
1164 if (type == OP_GREPSTART || type == OP_ENTERSUB || type == OP_REFGEN)
1165 break;
46fc3d4c 1166 yyerror(form("Can't modify %s in %s",
638bc118 1167 (o->op_type == OP_NULL && (o->op_flags & OPf_SPECIAL)
22c35a8c
GS		 1168 ? "do block" : PL_op_desc[o->op_type]),
1169 type ? PL_op_desc[type] : "local"));
11343788 1170 return o;
79072805 1171
a0d0e21e
LW		 1172 case OP_PREINC:
1173 case OP_PREDEC:
1174 case OP_POW:
1175 case OP_MULTIPLY:
1176 case OP_DIVIDE:
1177 case OP_MODULO:
1178 case OP_REPEAT:
1179 case OP_ADD:
1180 case OP_SUBTRACT:
1181 case OP_CONCAT:
1182 case OP_LEFT_SHIFT:
1183 case OP_RIGHT_SHIFT:
1184 case OP_BIT_AND:
1185 case OP_BIT_XOR:
1186 case OP_BIT_OR:
1187 case OP_I_MULTIPLY:
1188 case OP_I_DIVIDE:
1189 case OP_I_MODULO:
1190 case OP_I_ADD:
1191 case OP_I_SUBTRACT:
11343788 1192 if (!(o->op_flags & OPf_STACKED))
a0d0e21e 1193 goto nomod;
3280af22 1194 PL_modcount++;
a0d0e21e
LW		 1195 break;
1196
79072805 1197 case OP_COND_EXPR:
11343788 1198 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2 1199 mod(kid, type);
79072805
LW		 1200 break;
1201
1202 case OP_RV2AV:
1203 case OP_RV2HV:
93af7a87 1204 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1205 croak("Can't localize through a reference");
11343788 1206 if (type == OP_REFGEN && o->op_flags & OPf_PARENS) {
3280af22 1207 PL_modcount = 10000;
11343788 1208 return o; /* Treat \(@foo) like ordinary list. */
748a9306
LW		 1209 }
1210 /* FALL THROUGH */
79072805 1211 case OP_RV2GV:
5dc0d613 1212 if (scalar_mod_type(o, type))
3fe9a6f1 1213 goto nomod;
11343788 1214 ref(cUNOPo->op_first, o->op_type);
79072805
LW		 1215 /* FALL THROUGH */
1216 case OP_AASSIGN:
1217 case OP_ASLICE:
1218 case OP_HSLICE:
93a17b20
LW		 1219 case OP_NEXTSTATE:
1220 case OP_DBSTATE:
a0d0e21e
LW		 1221 case OP_REFGEN:
1222 case OP_CHOMP:
3280af22 1223 PL_modcount = 10000;
79072805 1224 break;
463ee0b2 1225 case OP_RV2SV:
11343788 1226 if (!type && cUNOPo->op_first->op_type != OP_GV)
706a304b 1227 croak("Can't localize through a reference");
aeea060c 1228 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1229 /* FALL THROUGH */
79072805 1230 case OP_GV:
463ee0b2 1231 case OP_AV2ARYLEN:
3280af22 1232 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1233 case OP_SASSIGN:
8990e307 1234 case OP_AELEMFAST:
3280af22 1235 PL_modcount++;
8990e307
LW		 1236 break;
1237
748a9306
LW		 1238 case OP_PADAV:
1239 case OP_PADHV:
3280af22 1240 PL_modcount = 10000;
5196be3e
MB		 1241 if (type == OP_REFGEN && o->op_flags & OPf_PARENS)
1242 return o; /* Treat \(@foo) like ordinary list. */
1243 if (scalar_mod_type(o, type))
3fe9a6f1 1244 goto nomod;
748a9306
LW		 1245 /* FALL THROUGH */
1246 case OP_PADSV:
3280af22 1247 PL_modcount++;
748a9306
LW		 1248 if (!type)
1249 croak("Can't localize lexical variable %s",
3280af22 1250 SvPV(*av_fetch(PL_comppad_name, o->op_targ, 4), PL_na));
463ee0b2
LW		 1251 break;
1252
554b3eca 1253#ifdef USE_THREADS
2faa37cc 1254 case OP_THREADSV:
533c011a 1255 PL_modcount++; /* XXX ??? */
554b3eca
MB		 1256 break;
1257#endif /* USE_THREADS */
1258
748a9306
LW		 1259 case OP_PUSHMARK:
1260 break;
a0d0e21e 1261
69969c6f
SB		 1262 case OP_KEYS:
1263 if (type != OP_SASSIGN)
1264 goto nomod;
5d82c453
GA		 1265 goto lvalue_func;
1266 case OP_SUBSTR:
1267 if (o->op_private == 4) /* don't allow 4 arg substr as lvalue */
1268 goto nomod;
5f05dabc 1269 /* FALL THROUGH */
a0d0e21e 1270 case OP_POS:
463ee0b2 1271 case OP_VEC:
5d82c453 1272 lvalue_func:
11343788
MB		 1273 pad_free(o->op_targ);
1274 o->op_targ = pad_alloc(o->op_type, SVs_PADMY);
5dc0d613 1275 assert(SvTYPE(PAD_SV(o->op_targ)) == SVt_NULL);
11343788
MB		 1276 if (o->op_flags & OPf_KIDS)
1277 mod(cBINOPo->op_first->op_sibling, type);
463ee0b2 1278 break;
a0d0e21e 1279
463ee0b2
LW		 1280 case OP_AELEM:
1281 case OP_HELEM:
11343788 1282 ref(cBINOPo->op_first, o->op_type);
68dc0745 1283 if (type == OP_ENTERSUB &&
5dc0d613
MB		 1284 !(o->op_private & (OPpLVAL_INTRO | OPpDEREF)))
1285 o->op_private |= OPpLVAL_DEFER;
3280af22 1286 PL_modcount++;
463ee0b2
LW		 1287 break;
1288
1289 case OP_SCOPE:
1290 case OP_LEAVE:
1291 case OP_ENTER:
11343788
MB		 1292 if (o->op_flags & OPf_KIDS)
1293 mod(cLISTOPo->op_last, type);
a0d0e21e
LW		 1294 break;
1295
1296 case OP_NULL:
638bc118
GS		 1297 if (o->op_flags & OPf_SPECIAL) /* do BLOCK */
1298 goto nomod;
1299 else if (!(o->op_flags & OPf_KIDS))
463ee0b2 1300 break;
11343788
MB		 1301 if (o->op_targ != OP_LIST) {
1302 mod(cBINOPo->op_first, type);
a0d0e21e
LW		 1303 break;
1304 }
1305 /* FALL THROUGH */
463ee0b2 1306 case OP_LIST:
11343788 1307 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1308 mod(kid, type);
1309 break;
1310 }
11343788 1311 o->op_flags |= OPf_MOD;
a0d0e21e
LW		 1312
1313 if (type == OP_AASSIGN || type == OP_SASSIGN)
11343788 1314 o->op_flags |= OPf_SPECIAL|OPf_REF;
a0d0e21e 1315 else if (!type) {
11343788
MB		 1316 o->op_private |= OPpLVAL_INTRO;
1317 o->op_flags &= ~OPf_SPECIAL;
3280af22 1318 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 1319 }
a0d0e21e 1320 else if (type != OP_GREPSTART && type != OP_ENTERSUB)
11343788
MB		 1321 o->op_flags |= OPf_REF;
1322 return o;
463ee0b2
LW		 1323}
1324
3fe9a6f1 1325static bool
8ac85365 1326scalar_mod_type(OP *o, I32 type)
3fe9a6f1 1327{
1328 switch (type) {
1329 case OP_SASSIGN:
5196be3e 1330 if (o->op_type == OP_RV2GV)
3fe9a6f1 1331 return FALSE;
1332 /* FALL THROUGH */
1333 case OP_PREINC:
1334 case OP_PREDEC:
1335 case OP_POSTINC:
1336 case OP_POSTDEC:
1337 case OP_I_PREINC:
1338 case OP_I_PREDEC:
1339 case OP_I_POSTINC:
1340 case OP_I_POSTDEC:
1341 case OP_POW:
1342 case OP_MULTIPLY:
1343 case OP_DIVIDE:
1344 case OP_MODULO:
1345 case OP_REPEAT:
1346 case OP_ADD:
1347 case OP_SUBTRACT:
1348 case OP_I_MULTIPLY:
1349 case OP_I_DIVIDE:
1350 case OP_I_MODULO:
1351 case OP_I_ADD:
1352 case OP_I_SUBTRACT:
1353 case OP_LEFT_SHIFT:
1354 case OP_RIGHT_SHIFT:
1355 case OP_BIT_AND:
1356 case OP_BIT_XOR:
1357 case OP_BIT_OR:
1358 case OP_CONCAT:
1359 case OP_SUBST:
1360 case OP_TRANS:
49e9fbe6
GS		 1361 case OP_READ:
1362 case OP_SYSREAD:
1363 case OP_RECV:
3fe9a6f1 1364 case OP_ANDASSIGN: /* may work later */
1365 case OP_ORASSIGN: /* may work later */
1366 return TRUE;
1367 default:
1368 return FALSE;
1369 }
1370}
1371
463ee0b2 1372OP *
8ac85365 1373refkids(OP *o, I32 type)
463ee0b2
LW		 1374{
1375 OP *kid;
11343788
MB		 1376 if (o && o->op_flags & OPf_KIDS) {
1377 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
463ee0b2
LW		 1378 ref(kid, type);
1379 }
11343788 1380 return o;
463ee0b2
LW		 1381}
1382
1383OP *
8ac85365 1384ref(OP *o, I32 type)
463ee0b2
LW		 1385{
1386 OP *kid;
463ee0b2 1387
3280af22 1388 if (!o || PL_error_count)
11343788 1389 return o;
463ee0b2 1390
11343788 1391 switch (o->op_type) {
a0d0e21e 1392 case OP_ENTERSUB:
e55aaa0e 1393 if ((type == OP_DEFINED || type == OP_LOCK) &&
11343788
MB		 1394 !(o->op_flags & OPf_STACKED)) {
1395 o->op_type = OP_RV2CV; /* entersub => rv2cv */
22c35a8c 1396 o->op_ppaddr = PL_ppaddr[OP_RV2CV];
11343788
MB		 1397 assert(cUNOPo->op_first->op_type == OP_NULL);
1398 null(((LISTOP*)cUNOPo->op_first)->op_first); /* disable pushmark */
1399 o->op_flags |= OPf_SPECIAL;
8990e307
LW		 1400 }
1401 break;
aeea060c 1402
463ee0b2 1403 case OP_COND_EXPR:
11343788 1404 for (kid = cUNOPo->op_first->op_sibling; kid; kid = kid->op_sibling)
463ee0b2
LW		 1405 ref(kid, type);
1406 break;
8990e307 1407 case OP_RV2SV:
11343788 1408 ref(cUNOPo->op_first, o->op_type);
4633a7c4
LW		 1409 /* FALL THROUGH */
1410 case OP_PADSV:
5f05dabc 1411 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1412 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1413 : type == OP_RV2HV ? OPpDEREF_HV
1414 : OPpDEREF_SV);
11343788 1415 o->op_flags |= OPf_MOD;
a0d0e21e 1416 }
8990e307
LW		 1417 break;
1418
2faa37cc 1419 case OP_THREADSV:
a863c7d1
MB		 1420 o->op_flags |= OPf_MOD; /* XXX ??? */
1421 break;
1422
463ee0b2
LW		 1423 case OP_RV2AV:
1424 case OP_RV2HV:
aeea060c 1425 o->op_flags |= OPf_REF;
8990e307 1426 /* FALL THROUGH */
463ee0b2 1427 case OP_RV2GV:
11343788 1428 ref(cUNOPo->op_first, o->op_type);
463ee0b2 1429 break;
8990e307 1430
463ee0b2
LW		 1431 case OP_PADAV:
1432 case OP_PADHV:
aeea060c 1433 o->op_flags |= OPf_REF;
79072805 1434 break;
aeea060c 1435
8990e307 1436 case OP_SCALAR:
79072805 1437 case OP_NULL:
11343788 1438 if (!(o->op_flags & OPf_KIDS))
463ee0b2 1439 break;
11343788 1440 ref(cBINOPo->op_first, type);
79072805
LW		 1441 break;
1442 case OP_AELEM:
1443 case OP_HELEM:
11343788 1444 ref(cBINOPo->op_first, o->op_type);
5f05dabc 1445 if (type == OP_RV2SV || type == OP_RV2AV || type == OP_RV2HV) {
5dc0d613
MB		 1446 o->op_private |= (type == OP_RV2AV ? OPpDEREF_AV
1447 : type == OP_RV2HV ? OPpDEREF_HV
1448 : OPpDEREF_SV);
11343788 1449 o->op_flags |= OPf_MOD;
8990e307 1450 }
79072805
LW		 1451 break;
1452
463ee0b2 1453 case OP_SCOPE:
79072805
LW		 1454 case OP_LEAVE:
1455 case OP_ENTER:
8990e307 1456 case OP_LIST:
11343788 1457 if (!(o->op_flags & OPf_KIDS))
79072805 1458 break;
11343788 1459 ref(cLISTOPo->op_last, type);
79072805 1460 break;
a0d0e21e
LW		 1461 default:
1462 break;
79072805 1463 }
11343788 1464 return scalar(o);
8990e307 1465
79072805
LW		 1466}
1467
1468OP *
8ac85365 1469my(OP *o)
93a17b20
LW		 1470{
1471 OP *kid;
93a17b20
LW		 1472 I32 type;
1473
3280af22 1474 if (!o || PL_error_count)
11343788 1475 return o;
93a17b20 1476
11343788 1477 type = o->op_type;
93a17b20 1478 if (type == OP_LIST) {
11343788 1479 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
93a17b20 1480 my(kid);
dab48698 1481 } else if (type == OP_UNDEF) {
7766148a 1482 return o;
dab48698 1483 } else if (type != OP_PADSV &&
93a17b20
LW		 1484 type != OP_PADAV &&
1485 type != OP_PADHV &&
1486 type != OP_PUSHMARK)
1487 {
22c35a8c 1488 yyerror(form("Can't declare %s in my", PL_op_desc[o->op_type]));
11343788 1489 return o;
93a17b20 1490 }
11343788
MB		 1491 o->op_flags |= OPf_MOD;
1492 o->op_private |= OPpLVAL_INTRO;
1493 return o;
93a17b20
LW		 1494}
1495
1496OP *
8ac85365 1497sawparens(OP *o)
79072805
LW		 1498{
1499 if (o)
1500 o->op_flags |= OPf_PARENS;
1501 return o;
1502}
1503
1504OP *
8ac85365 1505bind_match(I32 type, OP *left, OP *right)
79072805 1506{
d008e5eb 1507 dTHR;
11343788 1508 OP *o;
79072805 1509
599cee73
PM		 1510 if (ckWARN(WARN_UNSAFE) &&
1511 (left->op_type == OP_RV2AV ||
1512 left->op_type == OP_RV2HV ||
1513 left->op_type == OP_PADAV ||
1514 left->op_type == OP_PADHV)) {
22c35a8c 1515 char *desc = PL_op_desc[(right->op_type == OP_SUBST ||
599cee73
PM		 1516 right->op_type == OP_TRANS)
1517 ? right->op_type : OP_MATCH];
1518 char *sample = ((left->op_type == OP_RV2AV ||
1519 left->op_type == OP_PADAV)
1520 ? "@array" : "%hash");
1521 warner(WARN_UNSAFE,
1522 "Applying %s to %s will act on scalar(%s)",
1523 desc, sample, sample);
2ae324a7 1524 }
1525
79072805
LW		 1526 if (right->op_type == OP_MATCH ||
1527 right->op_type == OP_SUBST ||
1528 right->op_type == OP_TRANS) {
1529 right->op_flags |= OPf_STACKED;
1530 if (right->op_type != OP_MATCH)
463ee0b2 1531 left = mod(left, right->op_type);
79072805 1532 if (right->op_type == OP_TRANS)
11343788 1533 o = newBINOP(OP_NULL, OPf_STACKED, scalar(left), right);
79072805 1534 else
11343788 1535 o = prepend_elem(right->op_type, scalar(left), right);
79072805 1536 if (type == OP_NOT)
11343788
MB		 1537 return newUNOP(OP_NOT, 0, scalar(o));
1538 return o;
79072805
LW		 1539 }
1540 else
1541 return bind_match(type, left,
1542 pmruntime(newPMOP(OP_MATCH, 0), right, Nullop));
1543}
1544
1545OP *
8ac85365 1546invert(OP *o)
79072805 1547{
11343788
MB		 1548 if (!o)
1549 return o;
79072805 1550 /* XXX need to optimize away NOT NOT here? Or do we let optimizer do it? */
11343788 1551 return newUNOP(OP_NOT, OPf_SPECIAL, scalar(o));
79072805
LW		 1552}
1553
1554OP *
8ac85365 1555scope(OP *o)
79072805
LW		 1556{
1557 if (o) {
3280af22 1558 if (o->op_flags & OPf_PARENS || PERLDB_NOOPT || PL_tainting) {
463ee0b2
LW		 1559 o = prepend_elem(OP_LINESEQ, newOP(OP_ENTER, 0), o);
1560 o->op_type = OP_LEAVE;
22c35a8c 1561 o->op_ppaddr = PL_ppaddr[OP_LEAVE];
463ee0b2
LW		 1562 }
1563 else {
1564 if (o->op_type == OP_LINESEQ) {
1565 OP *kid;
1566 o->op_type = OP_SCOPE;
22c35a8c 1567 o->op_ppaddr = PL_ppaddr[OP_SCOPE];
463ee0b2 1568 kid = ((LISTOP*)o)->op_first;
748a9306
LW		 1569 if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE){
1570 SvREFCNT_dec(((COP*)kid)->cop_filegv);
8990e307 1571 null(kid);
748a9306 1572 }
463ee0b2
LW		 1573 }
1574 else
748a9306 1575 o = newLISTOP(OP_SCOPE, 0, o, Nullop);
463ee0b2 1576 }
79072805
LW		 1577 }
1578 return o;
1579}
1580
b3ac6de7
IZ		 1581void
1582save_hints(void)
1583{
3280af22
NIS		 1584 SAVEI32(PL_hints);
1585 SAVESPTR(GvHV(PL_hintgv));
1586 GvHV(PL_hintgv) = newHVhv(GvHV(PL_hintgv));
1587 SAVEFREESV(GvHV(PL_hintgv));
b3ac6de7
IZ		 1588}
1589
a0d0e21e 1590int
8ac85365 1591block_start(int full)
79072805 1592{
11343788 1593 dTHR;
3280af22 1594 int retval = PL_savestack_ix;
b3ac6de7 1595
3280af22 1596 SAVEI32(PL_comppad_name_floor);
55497cff 1597 if (full) {
3280af22
NIS		 1598 if ((PL_comppad_name_fill = AvFILLp(PL_comppad_name)) > 0)
1599 PL_comppad_name_floor = PL_comppad_name_fill;
55497cff 1600 else
3280af22
NIS		 1601 PL_comppad_name_floor = 0;
1602 }
1603 SAVEI32(PL_min_intro_pending);
1604 SAVEI32(PL_max_intro_pending);
1605 PL_min_intro_pending = 0;
1606 SAVEI32(PL_comppad_name_fill);
1607 SAVEI32(PL_padix_floor);
1608 PL_padix_floor = PL_padix;
1609 PL_pad_reset_pending = FALSE;
b3ac6de7 1610 SAVEHINTS();
3280af22 1611 PL_hints &= ~HINT_BLOCK_SCOPE;
e24b16f9 1612 SAVEPPTR(PL_compiling.cop_warnings);
599cee73
PM		 1613 if (PL_compiling.cop_warnings != WARN_ALL &&
1614 PL_compiling.cop_warnings != WARN_NONE) {
1615 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
1616 SAVEFREESV(PL_compiling.cop_warnings) ;
1617 }
1618
1619
a0d0e21e
LW		 1620 return retval;
1621}
1622
1623OP*
8ac85365 1624block_end(I32 floor, OP *seq)
a0d0e21e 1625{
11343788 1626 dTHR;
3280af22 1627 int needblockscope = PL_hints & HINT_BLOCK_SCOPE;
a0d0e21e 1628 OP* retval = scalarseq(seq);
a0d0e21e 1629 LEAVE_SCOPE(floor);
3280af22 1630 PL_pad_reset_pending = FALSE;
e24b16f9 1631 PL_compiling.op_private = PL_hints;
a0d0e21e 1632 if (needblockscope)
3280af22
NIS		 1633 PL_hints |= HINT_BLOCK_SCOPE; /* propagate out */
1634 pad_leavemy(PL_comppad_name_fill);
1635 PL_cop_seqmax++;
a0d0e21e
LW		 1636 return retval;
1637}
1638
76e3520e 1639STATIC OP *
54b9620d
MB		 1640newDEFSVOP(void)
1641{
1642#ifdef USE_THREADS
1643 OP *o = newOP(OP_THREADSV, 0);
1644 o->op_targ = find_threadsv("_");
1645 return o;
1646#else
3280af22 1647 return newSVREF(newGVOP(OP_GV, 0, PL_defgv));
54b9620d
MB		 1648#endif /* USE_THREADS */
1649}
1650
a0d0e21e 1651void
8ac85365 1652newPROG(OP *o)
a0d0e21e 1653{
11343788 1654 dTHR;
3280af22
NIS		 1655 if (PL_in_eval) {
1656 PL_eval_root = newUNOP(OP_LEAVEEVAL, ((PL_in_eval & 4) ? OPf_SPECIAL : 0), o);
1657 PL_eval_start = linklist(PL_eval_root);
1658 PL_eval_root->op_next = 0;
1659 peep(PL_eval_start);
a0d0e21e
LW		 1660 }
1661 else {
5dc0d613 1662 if (!o)
a0d0e21e 1663 return;
3280af22
NIS		 1664 PL_main_root = scope(sawparens(scalarvoid(o)));
1665 PL_curcop = &PL_compiling;
1666 PL_main_start = LINKLIST(PL_main_root);
1667 PL_main_root->op_next = 0;
1668 peep(PL_main_start);
1669 PL_compcv = 0;
3841441e 1670
4fdae800 1671 /* Register with debugger */
84902520 1672 if (PERLDB_INTER) {
3841441e 1673 CV *cv = perl_get_cv("DB::postponed", FALSE);
3841441e
CS		 1674 if (cv) {
1675 dSP;
924508f0 1676 PUSHMARK(SP);
3280af22 1677 XPUSHs((SV*)PL_compiling.cop_filegv);
3841441e
CS		 1678 PUTBACK;
1679 perl_call_sv((SV*)cv, G_DISCARD);
1680 }
1681 }
79072805 1682 }
79072805
LW		 1683}
1684
1685OP *
8ac85365 1686localize(OP *o, I32 lex)
79072805
LW		 1687{
1688 if (o->op_flags & OPf_PARENS)
1689 list(o);
8990e307 1690 else {
d008e5eb 1691 dTHR;
599cee73 1692 if (ckWARN(WARN_PARENTHESIS) && PL_bufptr > PL_oldbufptr && PL_bufptr[-1] == ',') {
8990e307 1693 char *s;
834a4ddd 1694 for (s = PL_bufptr; *s && (isALNUM(*s) || (*s & 0x80) || strchr("@$%, ",*s)); s++) ;
a0d0e21e 1695 if (*s == ';' || *s == '=')
599cee73
PM		 1696 warner(WARN_PARENTHESIS, "Parens missing around \"%s\" list",
1697 lex ? "my" : "local");
8990e307
LW		 1698 }
1699 }
3280af22
NIS		 1700 PL_in_my = FALSE;
1701 PL_in_my_stash = Nullhv;
93a17b20
LW		 1702 if (lex)
1703 return my(o);
1704 else
463ee0b2 1705 return mod(o, OP_NULL); /* a bit kludgey */
79072805
LW		 1706}
1707
1708OP *
8ac85365 1709jmaybe(OP *o)
79072805
LW		 1710{
1711 if (o->op_type == OP_LIST) {
554b3eca
MB		 1712 OP *o2;
1713#ifdef USE_THREADS
2faa37cc 1714 o2 = newOP(OP_THREADSV, 0);
54b9620d 1715 o2->op_targ = find_threadsv(";");
554b3eca
MB		 1716#else
1717 o2 = newSVREF(newGVOP(OP_GV, 0, gv_fetchpv(";", TRUE, SVt_PV))),
1718#endif /* USE_THREADS */
1719 o = convert(OP_JOIN, 0, prepend_elem(OP_LIST, o2, o));
79072805
LW		 1720 }
1721 return o;
1722}
1723
1724OP *
8ac85365 1725fold_constants(register OP *o)
79072805 1726{
11343788 1727 dTHR;
79072805
LW		 1728 register OP *curop;
1729 I32 type = o->op_type;
748a9306 1730 SV *sv;
79072805 1731
22c35a8c 1732 if (PL_opargs[type] & OA_RETSCALAR)
79072805 1733 scalar(o);
22c35a8c 1734 if (PL_opargs[type] & OA_TARGET)
ed6116ce 1735 o->op_targ = pad_alloc(type, SVs_PADTMP);
79072805 1736
22c35a8c
GS		 1737 if ((PL_opargs[type] & OA_OTHERINT) && (PL_hints & HINT_INTEGER))
1738 o->op_ppaddr = PL_ppaddr[type = ++(o->op_type)];
85e6fe83 1739
22c35a8c 1740 if (!(PL_opargs[type] & OA_FOLDCONST))
79072805
LW		 1741 goto nope;
1742
de939608
CS		 1743 switch (type) {
1744 case OP_SPRINTF:
1745 case OP_UCFIRST:
1746 case OP_LCFIRST:
1747 case OP_UC:
1748 case OP_LC:
69dcf70c
MB		 1749 case OP_SLT:
1750 case OP_SGT:
1751 case OP_SLE:
1752 case OP_SGE:
1753 case OP_SCMP:
1754
de939608
CS		 1755 if (o->op_private & OPpLOCALE)
1756 goto nope;
1757 }
1758
3280af22 1759 if (PL_error_count)
a0d0e21e
LW		 1760 goto nope; /* Don't try to run w/ errors */
1761
79072805 1762 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
93a17b20
LW		 1763 if (curop->op_type != OP_CONST &&
1764 curop->op_type != OP_LIST &&
1765 curop->op_type != OP_SCALAR &&
a0d0e21e 1766 curop->op_type != OP_NULL &&
93a17b20 1767 curop->op_type != OP_PUSHMARK) {
79072805
LW		 1768 goto nope;
1769 }
1770 }
1771
1772 curop = LINKLIST(o);
1773 o->op_next = 0;
533c011a 1774 PL_op = curop;
76e3520e 1775 CALLRUNOPS();
3280af22 1776 sv = *(PL_stack_sp--);
748a9306 1777 if (o->op_targ && sv == PAD_SV(o->op_targ)) /* grab pad temp? */
79072805 1778 pad_swipe(o->op_targ);
748a9306
LW		 1779 else if (SvTEMP(sv)) { /* grab mortal temp? */
1780 (void)SvREFCNT_inc(sv);
1781 SvTEMP_off(sv);
85e6fe83 1782 }
79072805
LW		 1783 op_free(o);
1784 if (type == OP_RV2GV)
b1cb66bf 1785 return newGVOP(OP_GV, 0, (GV*)sv);
748a9306 1786 else {
ee580363
GS		 1787 /* try to smush double to int, but don't smush -2.0 to -2 */
1788 if ((SvFLAGS(sv) & (SVf_IOK|SVf_NOK|SVf_POK)) == SVf_NOK &&
1789 type != OP_NEGATE)
1790 {
748a9306 1791 IV iv = SvIV(sv);
ee580363 1792 if ((double)iv == SvNV(sv)) {
748a9306
LW		 1793 SvREFCNT_dec(sv);
1794 sv = newSViv(iv);
1795 }
b1cb66bf 1796 else
1797 SvIOK_off(sv); /* undo SvIV() damage */
748a9306
LW		 1798 }
1799 return newSVOP(OP_CONST, 0, sv);
1800 }
aeea060c 1801
79072805 1802 nope:
22c35a8c 1803 if (!(PL_opargs[type] & OA_OTHERINT))
79072805 1804 return o;
79072805 1805
3280af22 1806 if (!(PL_hints & HINT_INTEGER)) {
a0d0e21e 1807 if (type == OP_DIVIDE || !(o->op_flags & OPf_KIDS))
85e6fe83
LW		 1808 return o;
1809
1810 for (curop = ((UNOP*)o)->op_first; curop; curop = curop->op_sibling) {
1811 if (curop->op_type == OP_CONST) {
b1cb66bf 1812 if (SvIOK(((SVOP*)curop)->op_sv))
85e6fe83
LW		 1813 continue;
1814 return o;
1815 }
22c35a8c 1816 if (PL_opargs[curop->op_type] & OA_RETINTEGER)
79072805
LW		 1817 continue;
1818 return o;
1819 }
22c35a8c 1820 o->op_ppaddr = PL_ppaddr[++(o->op_type)];
79072805
LW		 1821 }
1822
79072805
LW		 1823 return o;
1824}
1825
1826OP *
8ac85365 1827gen_constant_list(register OP *o)
79072805 1828{
11343788 1829 dTHR;
79072805 1830 register OP *curop;
3280af22 1831 I32 oldtmps_floor = PL_tmps_floor;
79072805 1832
a0d0e21e 1833 list(o);
3280af22 1834 if (PL_error_count)
a0d0e21e
LW		 1835 return o; /* Don't attempt to run with errors */
1836
533c011a 1837 PL_op = curop = LINKLIST(o);
a0d0e21e 1838 o->op_next = 0;
11343788 1839 pp_pushmark(ARGS);
76e3520e 1840 CALLRUNOPS();
533c011a 1841 PL_op = curop;
11343788 1842 pp_anonlist(ARGS);
3280af22 1843 PL_tmps_floor = oldtmps_floor;
79072805
LW		 1844
1845 o->op_type = OP_RV2AV;
22c35a8c 1846 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 1847 curop = ((UNOP*)o)->op_first;
3280af22 1848 ((UNOP*)o)->op_first = newSVOP(OP_CONST, 0, SvREFCNT_inc(*PL_stack_sp--));
79072805 1849 op_free(curop);
79072805
LW		 1850 linklist(o);
1851 return list(o);
1852}
1853
1854OP *
8ac85365 1855convert(I32 type, I32 flags, OP *o)
79072805
LW		 1856{
1857 OP *kid;
a0d0e21e 1858 OP *last = 0;
79072805 1859
11343788
MB		 1860 if (!o || o->op_type != OP_LIST)
1861 o = newLISTOP(OP_LIST, 0, o, Nullop);
748a9306 1862 else
5dc0d613 1863 o->op_flags &= ~OPf_WANT;
79072805 1864
22c35a8c 1865 if (!(PL_opargs[type] & OA_MARK))
11343788 1866 null(cLISTOPo->op_first);
8990e307 1867
11343788 1868 o->op_type = type;
22c35a8c 1869 o->op_ppaddr = PL_ppaddr[type];
11343788 1870 o->op_flags |= flags;
79072805 1871
11343788
MB		 1872 o = CHECKOP(type, o);
1873 if (o->op_type != type)
1874 return o;
79072805 1875
11343788 1876 if (cLISTOPo->op_children < 7) {
79072805 1877 /* XXX do we really need to do this if we're done appending?? */
11343788 1878 for (kid = cLISTOPo->op_first; kid; kid = kid->op_sibling)
79072805 1879 last = kid;
11343788 1880 cLISTOPo->op_last = last; /* in case check substituted last arg */
79072805
LW		 1881 }
1882
11343788 1883 return fold_constants(o);
79072805
LW		 1884}
1885
1886/* List constructors */
1887
1888OP *
8ac85365 1889append_elem(I32 type, OP *first, OP *last)
79072805
LW		 1890{
1891 if (!first)
1892 return last;
8990e307
LW		 1893
1894 if (!last)
79072805 1895 return first;
8990e307 1896
a0d0e21e
LW		 1897 if (first->op_type != type || type==OP_LIST && first->op_flags & OPf_PARENS)
1898 return newLISTOP(type, 0, first, last);
79072805 1899
a0d0e21e
LW		 1900 if (first->op_flags & OPf_KIDS)
1901 ((LISTOP*)first)->op_last->op_sibling = last;
1902 else {
1903 first->op_flags |= OPf_KIDS;
1904 ((LISTOP*)first)->op_first = last;
1905 }
1906 ((LISTOP*)first)->op_last = last;
1907 ((LISTOP*)first)->op_children++;
1908 return first;
79072805
LW		 1909}
1910
1911OP *
8ac85365 1912append_list(I32 type, LISTOP *first, LISTOP *last)
79072805
LW		 1913{
1914 if (!first)
1915 return (OP*)last;
8990e307
LW		 1916
1917 if (!last)
79072805 1918 return (OP*)first;
8990e307
LW		 1919
1920 if (first->op_type != type)
79072805 1921 return prepend_elem(type, (OP*)first, (OP*)last);
8990e307
LW		 1922
1923 if (last->op_type != type)
79072805
LW		 1924 return append_elem(type, (OP*)first, (OP*)last);
1925
1926 first->op_last->op_sibling = last->op_first;
1927 first->op_last = last->op_last;
1928 first->op_children += last->op_children;
1929 if (first->op_children)
acb74605 1930 first->op_flags |= OPf_KIDS;
79072805
LW		 1931
1932 Safefree(last);
1933 return (OP*)first;
1934}
1935
1936OP *
8ac85365 1937prepend_elem(I32 type, OP *first, OP *last)
79072805
LW		 1938{
1939 if (!first)
1940 return last;
8990e307
LW		 1941
1942 if (!last)
79072805 1943 return first;
8990e307
LW		 1944
1945 if (last->op_type == type) {
1946 if (type == OP_LIST) { /* already a PUSHMARK there */
1947 first->op_sibling = ((LISTOP*)last)->op_first->op_sibling;
1948 ((LISTOP*)last)->op_first->op_sibling = first;
1949 }
1950 else {
1951 if (!(last->op_flags & OPf_KIDS)) {
1952 ((LISTOP*)last)->op_last = first;
1953 last->op_flags |= OPf_KIDS;
1954 }
1955 first->op_sibling = ((LISTOP*)last)->op_first;
1956 ((LISTOP*)last)->op_first = first;
79072805 1957 }
79072805
LW		 1958 ((LISTOP*)last)->op_children++;
1959 return last;
1960 }
1961
1962 return newLISTOP(type, 0, first, last);
1963}
1964
1965/* Constructors */
1966
1967OP *
8ac85365 1968newNULLLIST(void)
79072805 1969{
8990e307
LW		 1970 return newOP(OP_STUB, 0);
1971}
1972
1973OP *
8ac85365 1974force_list(OP *o)
8990e307 1975{
11343788
MB		 1976 if (!o || o->op_type != OP_LIST)
1977 o = newLISTOP(OP_LIST, 0, o, Nullop);
1978 null(o);
1979 return o;
79072805
LW		 1980}
1981
1982OP *
8ac85365 1983newLISTOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 1984{
1985 LISTOP *listop;
1986
1987 Newz(1101, listop, 1, LISTOP);
1988
1989 listop->op_type = type;
22c35a8c 1990 listop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 1991 listop->op_children = (first != 0) + (last != 0);
1992 listop->op_flags = flags;
79072805
LW		 1993
1994 if (!last && first)
1995 last = first;
1996 else if (!first && last)
1997 first = last;
8990e307
LW		 1998 else if (first)
1999 first->op_sibling = last;
79072805
LW		 2000 listop->op_first = first;
2001 listop->op_last = last;
8990e307
LW		 2002 if (type == OP_LIST) {
2003 OP* pushop;
2004 pushop = newOP(OP_PUSHMARK, 0);
2005 pushop->op_sibling = first;
2006 listop->op_first = pushop;
2007 listop->op_flags |= OPf_KIDS;
2008 if (!last)
2009 listop->op_last = pushop;
2010 }
2011 else if (listop->op_children)
2012 listop->op_flags |= OPf_KIDS;
79072805
LW		 2013
2014 return (OP*)listop;
2015}
2016
2017OP *
8ac85365 2018newOP(I32 type, I32 flags)
79072805 2019{
11343788
MB		 2020 OP *o;
2021 Newz(1101, o, 1, OP);
2022 o->op_type = type;
22c35a8c 2023 o->op_ppaddr = PL_ppaddr[type];
11343788 2024 o->op_flags = flags;
79072805 2025
11343788
MB		 2026 o->op_next = o;
2027 o->op_private = 0 + (flags >> 8);
22c35a8c 2028 if (PL_opargs[type] & OA_RETSCALAR)
11343788 2029 scalar(o);
22c35a8c 2030 if (PL_opargs[type] & OA_TARGET)
11343788
MB		 2031 o->op_targ = pad_alloc(type, SVs_PADTMP);
2032 return CHECKOP(type, o);
79072805
LW		 2033}
2034
2035OP *
8ac85365 2036newUNOP(I32 type, I32 flags, OP *first)
79072805
LW		 2037{
2038 UNOP *unop;
2039
93a17b20 2040 if (!first)
aeea060c 2041 first = newOP(OP_STUB, 0);
22c35a8c 2042 if (PL_opargs[type] & OA_MARK)
8990e307 2043 first = force_list(first);
93a17b20 2044
79072805
LW		 2045 Newz(1101, unop, 1, UNOP);
2046 unop->op_type = type;
22c35a8c 2047 unop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2048 unop->op_first = first;
2049 unop->op_flags = flags | OPf_KIDS;
c07a80fd 2050 unop->op_private = 1 | (flags >> 8);
e50aee73 2051 unop = (UNOP*) CHECKOP(type, unop);
79072805
LW		 2052 if (unop->op_next)
2053 return (OP*)unop;
2054
a0d0e21e 2055 return fold_constants((OP *) unop);
79072805
LW		 2056}
2057
2058OP *
8ac85365 2059newBINOP(I32 type, I32 flags, OP *first, OP *last)
79072805
LW		 2060{
2061 BINOP *binop;
2062 Newz(1101, binop, 1, BINOP);
2063
2064 if (!first)
2065 first = newOP(OP_NULL, 0);
2066
2067 binop->op_type = type;
22c35a8c 2068 binop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2069 binop->op_first = first;
2070 binop->op_flags = flags | OPf_KIDS;
2071 if (!last) {
2072 last = first;
c07a80fd 2073 binop->op_private = 1 | (flags >> 8);
79072805
LW		 2074 }
2075 else {
c07a80fd 2076 binop->op_private = 2 | (flags >> 8);
79072805
LW		 2077 first->op_sibling = last;
2078 }
2079
e50aee73 2080 binop = (BINOP*)CHECKOP(type, binop);
79072805
LW		 2081 if (binop->op_next)
2082 return (OP*)binop;
2083
7284ab6f 2084 binop->op_last = binop->op_first->op_sibling;
79072805 2085
a0d0e21e 2086 return fold_constants((OP *)binop);
79072805
LW		 2087}
2088
a0ed51b3
LW		 2089static int
2090utf8compare(const void *a, const void *b)
2091{
2092 int i;
2093 for (i = 0; i < 10; i++) {
2094 if ((*(U8**)a)[i] < (*(U8**)b)[i])
2095 return -1;
2096 if ((*(U8**)a)[i] > (*(U8**)b)[i])
2097 return 1;
2098 }
2099 return 0;
2100}
2101
79072805 2102OP *
8ac85365 2103pmtrans(OP *o, OP *expr, OP *repl)
79072805 2104{
79072805
LW		 2105 SV *tstr = ((SVOP*)expr)->op_sv;
2106 SV *rstr = ((SVOP*)repl)->op_sv;
463ee0b2
LW		 2107 STRLEN tlen;
2108 STRLEN rlen;
ec49126f 2109 register U8 *t = (U8*)SvPV(tstr, tlen);
2110 register U8 *r = (U8*)SvPV(rstr, rlen);
79072805
LW		 2111 register I32 i;
2112 register I32 j;
a0ed51b3 2113 I32 del;
79072805 2114 I32 complement;
5d06d08e 2115 I32 squash;
79072805
LW		 2116 register short *tbl;
2117
11343788 2118 complement = o->op_private & OPpTRANS_COMPLEMENT;
a0ed51b3 2119 del = o->op_private & OPpTRANS_DELETE;
5d06d08e 2120 squash = o->op_private & OPpTRANS_SQUASH;
79072805 2121
a0ed51b3
LW		 2122 if (o->op_private & (OPpTRANS_FROM_UTF|OPpTRANS_TO_UTF)) {
2123 SV* listsv = newSVpv("# comment\n",0);
2124 SV* transv = 0;
2125 U8* tend = t + tlen;
2126 U8* rend = r + rlen;
2127 I32 ulen;
2128 U32 tfirst = 1;
2129 U32 tlast = 0;
2130 I32 tdiff;
2131 U32 rfirst = 1;
2132 U32 rlast = 0;
2133 I32 rdiff;
2134 I32 diff;
2135 I32 none = 0;
2136 U32 max = 0;
2137 I32 bits;
2138 I32 grows = 0;
2139 I32 havefinal = 0;
2140 U32 final;
2141 HV *hv;
2142 I32 from_utf = o->op_private & OPpTRANS_FROM_UTF;
2143 I32 to_utf = o->op_private & OPpTRANS_TO_UTF;
2144
2145 if (complement) {
2146 U8 tmpbuf[10];
2147 U8** cp;
2148 UV nextmin = 0;
2149 New(1109, cp, tlen, U8*);
2150 i = 0;
2151 transv = newSVpv("",0);
2152 while (t < tend) {
2153 cp[i++] = t;
2154 t += UTF8SKIP(t);
2155 if (*t == 0xff) {
2156 t++;
2157 t += UTF8SKIP(t);
2158 }
2159 }
2160 qsort(cp, i, sizeof(U8*), utf8compare);
2161 for (j = 0; j < i; j++) {
2162 U8 *s = cp[j];
2163 UV val = utf8_to_uv(s, &ulen);
2164 s += ulen;
2165 diff = val - nextmin;
2166 if (diff > 0) {
2167 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2168 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2169 if (diff > 1) {
2170 t = uv_to_utf8(tmpbuf, val - 1);
2171 sv_catpvn(transv, "\377", 1);
dfe13c55 2172 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2173 }
2174 }
2175 if (*s == 0xff)
2176 val = utf8_to_uv(s+1, &ulen);
2177 if (val >= nextmin)
2178 nextmin = val + 1;
2179 }
2180 t = uv_to_utf8(tmpbuf,nextmin);
dfe13c55 2181 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
a0ed51b3
LW		 2182 t = uv_to_utf8(tmpbuf, 0x7fffffff);
2183 sv_catpvn(transv, "\377", 1);
dfe13c55
GS		 2184 sv_catpvn(transv, (char*)tmpbuf, t - tmpbuf);
2185 t = (U8*)SvPVX(transv);
a0ed51b3
LW		 2186 tlen = SvCUR(transv);
2187 tend = t + tlen;
2188 }
2189 else if (!rlen && !del) {
2190 r = t; rlen = tlen; rend = tend;
4757a243
LW		 2191 }
2192 if (!squash) {
2193 if (to_utf && from_utf) { /* only counting characters */
2194 if (t == r || (tlen == rlen && memEQ(t, r, tlen)))
2195 o->op_private |= OPpTRANS_IDENTICAL;
2196 }
2197 else { /* straight latin-1 translation */
2198 if (tlen == 4 && memEQ(t, "\0\377\303\277", 4) &&
2199 rlen == 4 && memEQ(r, "\0\377\303\277", 4))
2200 o->op_private |= OPpTRANS_IDENTICAL;
2201 }
a0ed51b3
LW		 2202 }
2203
2204 while (t < tend || tfirst <= tlast) {
2205 /* see if we need more "t" chars */
2206 if (tfirst > tlast) {
2207 tfirst = (I32)utf8_to_uv(t, &ulen);
2208 t += ulen;
2209 if (t < tend && *t == 0xff) { /* illegal utf8 val indicates range */
2210 tlast = (I32)utf8_to_uv(++t, &ulen);
2211 t += ulen;
2212 }
2213 else
2214 tlast = tfirst;
2215 }
2216
2217 /* now see if we need more "r" chars */
2218 if (rfirst > rlast) {
2219 if (r < rend) {
2220 rfirst = (I32)utf8_to_uv(r, &ulen);
2221 r += ulen;
2222 if (r < rend && *r == 0xff) { /* illegal utf8 val indicates range */
2223 rlast = (I32)utf8_to_uv(++r, &ulen);
2224 r += ulen;
2225 }
2226 else
2227 rlast = rfirst;
2228 }
2229 else {
2230 if (!havefinal++)
2231 final = rlast;
2232 rfirst = rlast = 0xffffffff;
2233 }
2234 }
2235
2236 /* now see which range will peter our first, if either. */
2237 tdiff = tlast - tfirst;
2238 rdiff = rlast - rfirst;
2239
2240 if (tdiff <= rdiff)
2241 diff = tdiff;
2242 else
2243 diff = rdiff;
2244
2245 if (rfirst == 0xffffffff) {
2246 diff = tdiff; /* oops, pretend rdiff is infinite */
2247 if (diff > 0)
2248 sv_catpvf(listsv, "%04x\t%04x\tXXXX\n", tfirst, tlast);
2249 else
2250 sv_catpvf(listsv, "%04x\t\tXXXX\n", tfirst);
2251 }
2252 else {
2253 if (diff > 0)
2254 sv_catpvf(listsv, "%04x\t%04x\t%04x\n", tfirst, tfirst + diff, rfirst);
2255 else
2256 sv_catpvf(listsv, "%04x\t\t%04x\n", tfirst, rfirst);
2257
2258 if (rfirst + diff > max)
2259 max = rfirst + diff;
2260 rfirst += diff + 1;
2261 if (!grows) {
2262 if (rfirst <= 0x80)
2263 ;
2264 else if (rfirst <= 0x800)
2265 grows |= (tfirst < 0x80);
2266 else if (rfirst <= 0x10000)
2267 grows |= (tfirst < 0x800);
2268 else if (rfirst <= 0x200000)
2269 grows |= (tfirst < 0x10000);
2270 else if (rfirst <= 0x4000000)
2271 grows |= (tfirst < 0x200000);
2272 else if (rfirst <= 0x80000000)
2273 grows |= (tfirst < 0x4000000);
2274 }
2275 }
2276 tfirst += diff + 1;
2277 }
2278
2279 none = ++max;
2280 if (del)
2281 del = ++max;
2282
2283 if (max > 0xffff)
2284 bits = 32;
2285 else if (max > 0xff)
2286 bits = 16;
2287 else
2288 bits = 8;
2289
2290 cSVOPo->op_sv = (SV*)swash_init("utf8", "", listsv, bits, none);
2291 SvREFCNT_dec(listsv);
2292 if (transv)
2293 SvREFCNT_dec(transv);
2294
2295 if (!del && havefinal)
2296 (void)hv_store((HV*)SvRV((cSVOPo->op_sv)), "FINAL", 5, newSViv((IV)final), 0);
2297
2298 if (grows && to_utf)
2299 o->op_private |= OPpTRANS_GROWS;
2300
2301 op_free(expr);
2302 op_free(repl);
2303 return o;
2304 }
2305
2306 tbl = (short*)cPVOPo->op_pv;
79072805
LW		 2307 if (complement) {
2308 Zero(tbl, 256, short);
2309 for (i = 0; i < tlen; i++)
ec49126f 2310 tbl[t[i]] = -1;
79072805
LW		 2311 for (i = 0, j = 0; i < 256; i++) {
2312 if (!tbl[i]) {
2313 if (j >= rlen) {
a0ed51b3 2314 if (del)
79072805
LW		 2315 tbl[i] = -2;
2316 else if (rlen)
ec49126f 2317 tbl[i] = r[j-1];
79072805
LW		 2318 else
2319 tbl[i] = i;
2320 }
2321 else
ec49126f 2322 tbl[i] = r[j++];
79072805
LW		 2323 }
2324 }
2325 }
2326 else {
a0ed51b3 2327 if (!rlen && !del) {
79072805 2328 r = t; rlen = tlen;
5d06d08e 2329 if (!squash)
4757a243 2330 o->op_private |= OPpTRANS_IDENTICAL;
79072805
LW		 2331 }
2332 for (i = 0; i < 256; i++)
2333 tbl[i] = -1;
2334 for (i = 0, j = 0; i < tlen; i++,j++) {
2335 if (j >= rlen) {
a0ed51b3 2336 if (del) {
ec49126f 2337 if (tbl[t[i]] == -1)
2338 tbl[t[i]] = -2;
79072805
LW		 2339 continue;
2340 }
2341 --j;
2342 }
ec49126f 2343 if (tbl[t[i]] == -1)
2344 tbl[t[i]] = r[j];
79072805
LW		 2345 }
2346 }
2347 op_free(expr);
2348 op_free(repl);
2349
11343788 2350 return o;
79072805
LW		 2351}
2352
2353OP *
8ac85365 2354newPMOP(I32 type, I32 flags)
79072805 2355{
11343788 2356 dTHR;
79072805
LW		 2357 PMOP *pmop;
2358
2359 Newz(1101, pmop, 1, PMOP);
2360 pmop->op_type = type;
22c35a8c 2361 pmop->op_ppaddr = PL_ppaddr[type];
79072805 2362 pmop->op_flags = flags;
c07a80fd 2363 pmop->op_private = 0 | (flags >> 8);
79072805 2364
3280af22 2365 if (PL_hints & HINT_RE_TAINT)
b3eb6a9b 2366 pmop->op_pmpermflags |= PMf_RETAINT;
3280af22 2367 if (PL_hints & HINT_LOCALE)
b3eb6a9b
GS		 2368 pmop->op_pmpermflags |= PMf_LOCALE;
2369 pmop->op_pmflags = pmop->op_pmpermflags;
36477c24 2370
79072805 2371 /* link into pm list */
3280af22
NIS		 2372 if (type != OP_TRANS && PL_curstash) {
2373 pmop->op_pmnext = HvPMROOT(PL_curstash);
2374 HvPMROOT(PL_curstash) = pmop;
79072805
LW		 2375 }
2376
2377 return (OP*)pmop;
2378}
2379
2380OP *
8ac85365 2381pmruntime(OP *o, OP *expr, OP *repl)
79072805 2382{
5c0ca799 2383 dTHR;
79072805
LW		 2384 PMOP *pm;
2385 LOGOP *rcop;
ce862d02 2386 I32 repl_has_vars = 0;
79072805 2387
11343788
MB		 2388 if (o->op_type == OP_TRANS)
2389 return pmtrans(o, expr, repl);
79072805 2390
3280af22 2391 PL_hints |= HINT_BLOCK_SCOPE;
11343788 2392 pm = (PMOP*)o;
79072805
LW		 2393
2394 if (expr->op_type == OP_CONST) {
463ee0b2 2395 STRLEN plen;
79072805 2396 SV *pat = ((SVOP*)expr)->op_sv;
463ee0b2 2397 char *p = SvPV(pat, plen);
11343788 2398 if ((o->op_flags & OPf_SPECIAL) && strEQ(p, " ")) {
93a17b20 2399 sv_setpvn(pat, "\\s+", 3);
463ee0b2 2400 p = SvPV(pat, plen);
79072805
LW		 2401 pm->op_pmflags |= PMf_SKIPWHITE;
2402 }
15e52e56 2403 pm->op_pmregexp = CALLREGCOMP(p, p + plen, pm);
aeea060c 2404 if (strEQ("\\s+", pm->op_pmregexp->precomp))
85e6fe83 2405 pm->op_pmflags |= PMf_WHITE;
79072805
LW		 2406 op_free(expr);
2407 }
2408 else {
3280af22
NIS		 2409 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL))
2410 expr = newUNOP((!(PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2411 ? OP_REGCRESET
2412 : OP_REGCMAYBE),0,expr);
463ee0b2 2413
79072805
LW		 2414 Newz(1101, rcop, 1, LOGOP);
2415 rcop->op_type = OP_REGCOMP;
22c35a8c 2416 rcop->op_ppaddr = PL_ppaddr[OP_REGCOMP];
79072805 2417 rcop->op_first = scalar(expr);
3280af22 2418 rcop->op_flags |= ((PL_hints & HINT_RE_EVAL)
2cd61cdb
IZ		 2419 ? (OPf_SPECIAL | OPf_KIDS)
2420 : OPf_KIDS);
79072805 2421 rcop->op_private = 1;
11343788 2422 rcop->op_other = o;
79072805
LW		 2423
2424 /* establish postfix order */
3280af22 2425 if (pm->op_pmflags & PMf_KEEP || !(PL_hints & HINT_RE_EVAL)) {
463ee0b2
LW		 2426 LINKLIST(expr);
2427 rcop->op_next = expr;
2428 ((UNOP*)expr)->op_first->op_next = (OP*)rcop;
2429 }
2430 else {
2431 rcop->op_next = LINKLIST(expr);
2432 expr->op_next = (OP*)rcop;
2433 }
79072805 2434
11343788 2435 prepend_elem(o->op_type, scalar((OP*)rcop), o);
79072805
LW		 2436 }
2437
2438 if (repl) {
748a9306
LW		 2439 OP *curop;
2440 if (pm->op_pmflags & PMf_EVAL)
2441 curop = 0;
554b3eca 2442#ifdef USE_THREADS
2faa37cc 2443 else if (repl->op_type == OP_THREADSV
554b3eca 2444 && strchr("&`'123456789+",
533c011a 2445 PL_threadsv_names[repl->op_targ]))
554b3eca
MB		 2446 {
2447 curop = 0;
2448 }
2449#endif /* USE_THREADS */
748a9306
LW		 2450 else if (repl->op_type == OP_CONST)
2451 curop = repl;
79072805 2452 else {
79072805
LW		 2453 OP *lastop = 0;
2454 for (curop = LINKLIST(repl); curop!=repl; curop = LINKLIST(curop)) {
22c35a8c 2455 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
554b3eca 2456#ifdef USE_THREADS
ce862d02
IZ		 2457 if (curop->op_type == OP_THREADSV) {
2458 repl_has_vars = 1;
be949f6f 2459 if (strchr("&`'123456789+", curop->op_private))
ce862d02 2460 break;
554b3eca
MB		 2461 }
2462#else
79072805
LW		 2463 if (curop->op_type == OP_GV) {
2464 GV *gv = ((GVOP*)curop)->op_gv;
ce862d02 2465 repl_has_vars = 1;
93a17b20 2466 if (strchr("&`'123456789+", *GvENAME(gv)))
79072805
LW		 2467 break;
2468 }
554b3eca 2469#endif /* USE_THREADS */
79072805
LW		 2470 else if (curop->op_type == OP_RV2CV)
2471 break;
2472 else if (curop->op_type == OP_RV2SV ||
2473 curop->op_type == OP_RV2AV ||
2474 curop->op_type == OP_RV2HV ||
2475 curop->op_type == OP_RV2GV) {
2476 if (lastop && lastop->op_type != OP_GV) /*funny deref?*/
2477 break;
2478 }
748a9306
LW		 2479 else if (curop->op_type == OP_PADSV ||
2480 curop->op_type == OP_PADAV ||
2481 curop->op_type == OP_PADHV ||
554b3eca 2482 curop->op_type == OP_PADANY) {
ce862d02 2483 repl_has_vars = 1;
748a9306 2484 }
1167e5da
SM		 2485 else if (curop->op_type == OP_PUSHRE)
2486 ; /* Okay here, dangerous in newASSIGNOP */
79072805
LW		 2487 else
2488 break;
2489 }
2490 lastop = curop;
2491 }
748a9306 2492 }
ce862d02
IZ		 2493 if (curop == repl
2494 && !(repl_has_vars
2495 && (!pm->op_pmregexp
2496 || pm->op_pmregexp->reganch & ROPT_EVAL_SEEN))) {
748a9306 2497 pm->op_pmflags |= PMf_CONST; /* const for long enough */
4633a7c4 2498 pm->op_pmpermflags |= PMf_CONST; /* const for long enough */
11343788 2499 prepend_elem(o->op_type, scalar(repl), o);
748a9306
LW		 2500 }
2501 else {
ce862d02
IZ		 2502 if (curop == repl && !pm->op_pmregexp) { /* Has variables. */
2503 pm->op_pmflags |= PMf_MAYBE_CONST;
2504 pm->op_pmpermflags |= PMf_MAYBE_CONST;
2505 }
748a9306
LW		 2506 Newz(1101, rcop, 1, LOGOP);
2507 rcop->op_type = OP_SUBSTCONT;
22c35a8c 2508 rcop->op_ppaddr = PL_ppaddr[OP_SUBSTCONT];
748a9306
LW		 2509 rcop->op_first = scalar(repl);
2510 rcop->op_flags |= OPf_KIDS;
2511 rcop->op_private = 1;
11343788 2512 rcop->op_other = o;
748a9306
LW		 2513
2514 /* establish postfix order */
2515 rcop->op_next = LINKLIST(repl);
2516 repl->op_next = (OP*)rcop;
2517
2518 pm->op_pmreplroot = scalar((OP*)rcop);
2519 pm->op_pmreplstart = LINKLIST(rcop);
2520 rcop->op_next = 0;
79072805
LW		 2521 }
2522 }
2523
2524 return (OP*)pm;
2525}
2526
2527OP *
8ac85365 2528newSVOP(I32 type, I32 flags, SV *sv)
79072805
LW		 2529{
2530 SVOP *svop;
2531 Newz(1101, svop, 1, SVOP);
2532 svop->op_type = type;
22c35a8c 2533 svop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2534 svop->op_sv = sv;
2535 svop->op_next = (OP*)svop;
2536 svop->op_flags = flags;
22c35a8c 2537 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2538 scalar((OP*)svop);
22c35a8c 2539 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2540 svop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2541 return CHECKOP(type, svop);
79072805
LW		 2542}
2543
2544OP *
8ac85365 2545newGVOP(I32 type, I32 flags, GV *gv)
79072805 2546{
11343788 2547 dTHR;
79072805
LW		 2548 GVOP *gvop;
2549 Newz(1101, gvop, 1, GVOP);
2550 gvop->op_type = type;
22c35a8c 2551 gvop->op_ppaddr = PL_ppaddr[type];
8990e307 2552 gvop->op_gv = (GV*)SvREFCNT_inc(gv);
79072805
LW		 2553 gvop->op_next = (OP*)gvop;
2554 gvop->op_flags = flags;
22c35a8c 2555 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2556 scalar((OP*)gvop);
22c35a8c 2557 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2558 gvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2559 return CHECKOP(type, gvop);
79072805
LW		 2560}
2561
2562OP *
8ac85365 2563newPVOP(I32 type, I32 flags, char *pv)
79072805
LW		 2564{
2565 PVOP *pvop;
2566 Newz(1101, pvop, 1, PVOP);
2567 pvop->op_type = type;
22c35a8c 2568 pvop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 2569 pvop->op_pv = pv;
2570 pvop->op_next = (OP*)pvop;
2571 pvop->op_flags = flags;
22c35a8c 2572 if (PL_opargs[type] & OA_RETSCALAR)
463ee0b2 2573 scalar((OP*)pvop);
22c35a8c 2574 if (PL_opargs[type] & OA_TARGET)
ed6116ce 2575 pvop->op_targ = pad_alloc(type, SVs_PADTMP);
e50aee73 2576 return CHECKOP(type, pvop);
79072805
LW		 2577}
2578
79072805 2579void
8ac85365 2580package(OP *o)
79072805 2581{
11343788 2582 dTHR;
93a17b20 2583 SV *sv;
79072805 2584
3280af22
NIS		 2585 save_hptr(&PL_curstash);
2586 save_item(PL_curstname);
11343788 2587 if (o) {
463ee0b2
LW		 2588 STRLEN len;
2589 char *name;
11343788 2590 sv = cSVOPo->op_sv;
463ee0b2 2591 name = SvPV(sv, len);
3280af22
NIS		 2592 PL_curstash = gv_stashpvn(name,len,TRUE);
2593 sv_setpvn(PL_curstname, name, len);
11343788 2594 op_free(o);
93a17b20
LW		 2595 }
2596 else {
3280af22
NIS		 2597 sv_setpv(PL_curstname,"<none>");
2598 PL_curstash = Nullhv;
93a17b20 2599 }
7ad382f4 2600 PL_hints |= HINT_BLOCK_SCOPE;
3280af22
NIS		 2601 PL_copline = NOLINE;
2602 PL_expect = XSTATE;
79072805
LW		 2603}
2604
85e6fe83 2605void
8ac85365 2606utilize(int aver, I32 floor, OP *version, OP *id, OP *arg)
85e6fe83 2607{
a0d0e21e
LW		 2608 OP *pack;
2609 OP *meth;
2610 OP *rqop;
2611 OP *imop;
b1cb66bf 2612 OP *veop;
78ca652e 2613 GV *gv;
85e6fe83 2614
a0d0e21e
LW		 2615 if (id->op_type != OP_CONST)
2616 croak("Module name must be constant");
85e6fe83 2617
b1cb66bf 2618 veop = Nullop;
2619
2620 if(version != Nullop) {
2621 SV *vesv = ((SVOP*)version)->op_sv;
2622
2623 if (arg == Nullop && !SvNIOK(vesv)) {
2624 arg = version;
2625 }
2626 else {
2627 OP *pack;
2628 OP *meth;
2629
2630 if (version->op_type != OP_CONST || !SvNIOK(vesv))
2631 croak("Version number must be constant number");
2632
2633 /* Make copy of id so we don't free it twice */
2634 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
2635
2636 /* Fake up a method call to VERSION */
2637 meth = newSVOP(OP_CONST, 0, newSVpv("VERSION", 7));
2638 veop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
2639 append_elem(OP_LIST,
2640 prepend_elem(OP_LIST, pack, list(version)),
2641 newUNOP(OP_METHOD, 0, meth)));
2642 }
2643 }
aeea060c 2644
a0d0e21e 2645 /* Fake up an import/unimport */
4633a7c4
LW		 2646 if (arg && arg->op_type == OP_STUB)
2647 imop = arg; /* no import on explicit () */
b1cb66bf 2648 else if(SvNIOK(((SVOP*)id)->op_sv)) {
2649 imop = Nullop; /* use 5.0; */
2650 }
4633a7c4
LW		 2651 else {
2652 /* Make copy of id so we don't free it twice */
2653 pack = newSVOP(OP_CONST, 0, newSVsv(((SVOP*)id)->op_sv));
4633a7c4
LW		 2654 meth = newSVOP(OP_CONST, 0,
2655 aver
2656 ? newSVpv("import", 6)
2657 : newSVpv("unimport", 8)
2658 );
2659 imop = convert(OP_ENTERSUB, OPf_STACKED|OPf_SPECIAL,
a0d0e21e
LW		 2660 append_elem(OP_LIST,
2661 prepend_elem(OP_LIST, pack, list(arg)),
2662 newUNOP(OP_METHOD, 0, meth)));
4633a7c4
LW		 2663 }
2664
78ca652e
GS		 2665 /* Fake up a require, handle override, if any */
2666 gv = gv_fetchpv("require", FALSE, SVt_PVCV);
2667 if (!(gv && GvIMPORTED_CV(gv)))
2668 gv = gv_fetchpv("CORE::GLOBAL::require", FALSE, SVt_PVCV);
2669
2670 if (gv && GvIMPORTED_CV(gv)) {
2671 rqop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2672 append_elem(OP_LIST, id,
2673 scalar(newUNOP(OP_RV2CV, 0,
2674 newGVOP(OP_GV, 0,
2675 gv))))));
2676 }
2677 else {
2678 rqop = newUNOP(OP_REQUIRE, 0, id);
2679 }
a0d0e21e
LW		 2680
2681 /* Fake up the BEGIN {}, which does its thing immediately. */
c07a80fd 2682 newSUB(floor,
a0d0e21e 2683 newSVOP(OP_CONST, 0, newSVpv("BEGIN", 5)),
4633a7c4 2684 Nullop,
a0d0e21e 2685 append_elem(OP_LINESEQ,
b1cb66bf 2686 append_elem(OP_LINESEQ,
2687 newSTATEOP(0, Nullch, rqop),
2688 newSTATEOP(0, Nullch, veop)),
a0d0e21e 2689 newSTATEOP(0, Nullch, imop) ));
85e6fe83 2690
3280af22
NIS		 2691 PL_copline = NOLINE;
2692 PL_expect = XSTATE;
85e6fe83
LW		 2693}
2694
79072805 2695OP *
78ca652e
GS		 2696dofile(OP *term)
2697{
2698 OP *doop;
2699 GV *gv;
2700
2701 gv = gv_fetchpv("do", FALSE, SVt_PVCV);
2702 if (!(gv && GvIMPORTED_CV(gv)))
2703 gv = gv_fetchpv("CORE::GLOBAL::do", FALSE, SVt_PVCV);
2704
2705 if (gv && GvIMPORTED_CV(gv)) {
2706 doop = ck_subr(newUNOP(OP_ENTERSUB, OPf_STACKED,
2707 append_elem(OP_LIST, term,
2708 scalar(newUNOP(OP_RV2CV, 0,
2709 newGVOP(OP_GV, 0,
2710 gv))))));
2711 }
2712 else {
2713 doop = newUNOP(OP_DOFILE, 0, scalar(term));
2714 }
2715 return doop;
2716}
2717
2718OP *
8ac85365 2719newSLICEOP(I32 flags, OP *subscript, OP *listval)
79072805
LW		 2720{
2721 return newBINOP(OP_LSLICE, flags,
8990e307
LW		 2722 list(force_list(subscript)),
2723 list(force_list(listval)) );
79072805
LW		 2724}
2725
76e3520e 2726STATIC I32
8ac85365 2727list_assignment(register OP *o)
79072805 2728{
11343788 2729 if (!o)
79072805
LW		 2730 return TRUE;
2731
11343788
MB		 2732 if (o->op_type == OP_NULL && o->op_flags & OPf_KIDS)
2733 o = cUNOPo->op_first;
79072805 2734
11343788
MB		 2735 if (o->op_type == OP_COND_EXPR) {
2736 I32 t = list_assignment(cCONDOPo->op_first->op_sibling);
2737 I32 f = list_assignment(cCONDOPo->op_first->op_sibling->op_sibling);
79072805
LW		 2738
2739 if (t && f)
2740 return TRUE;
2741 if (t || f)
2742 yyerror("Assignment to both a list and a scalar");
2743 return FALSE;
2744 }
2745
11343788
MB		 2746 if (o->op_type == OP_LIST || o->op_flags & OPf_PARENS ||
2747 o->op_type == OP_RV2AV || o->op_type == OP_RV2HV ||
2748 o->op_type == OP_ASLICE || o->op_type == OP_HSLICE)
79072805
LW		 2749 return TRUE;
2750
11343788 2751 if (o->op_type == OP_PADAV || o->op_type == OP_PADHV)
93a17b20
LW		 2752 return TRUE;
2753
11343788 2754 if (o->op_type == OP_RV2SV)
79072805
LW		 2755 return FALSE;
2756
2757 return FALSE;
2758}
2759
2760OP *
8ac85365 2761newASSIGNOP(I32 flags, OP *left, I32 optype, OP *right)
79072805 2762{
11343788 2763 OP *o;
79072805 2764
a0d0e21e
LW		 2765 if (optype) {
2766 if (optype == OP_ANDASSIGN || optype == OP_ORASSIGN) {
2767 return newLOGOP(optype, 0,
2768 mod(scalar(left), optype),
2769 newUNOP(OP_SASSIGN, 0, scalar(right)));
2770 }
2771 else {
2772 return newBINOP(optype, OPf_STACKED,
2773 mod(scalar(left), optype), scalar(right));
2774 }
2775 }
2776
79072805 2777 if (list_assignment(left)) {
6ee623d5 2778 dTHR;
3280af22
NIS		 2779 PL_modcount = 0;
2780 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
463ee0b2 2781 left = mod(left, OP_AASSIGN);
3280af22
NIS		 2782 if (PL_eval_start)
2783 PL_eval_start = 0;
748a9306 2784 else {
a0d0e21e
LW		 2785 op_free(left);
2786 op_free(right);
2787 return Nullop;
2788 }
11343788 2789 o = newBINOP(OP_AASSIGN, flags,
8990e307
LW		 2790 list(force_list(right)),
2791 list(force_list(left)) );
11343788 2792 o->op_private = 0 | (flags >> 8);
a0d0e21e 2793 if (!(left->op_private & OPpLVAL_INTRO)) {
79072805 2794 OP *curop;
11343788 2795 OP *lastop = o;
3280af22 2796 PL_generation++;
11343788 2797 for (curop = LINKLIST(o); curop != o; curop = LINKLIST(curop)) {
22c35a8c 2798 if (PL_opargs[curop->op_type] & OA_DANGEROUS) {
79072805
LW		 2799 if (curop->op_type == OP_GV) {
2800 GV *gv = ((GVOP*)curop)->op_gv;
3280af22 2801 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
79072805 2802 break;
3280af22 2803 SvCUR(gv) = PL_generation;
79072805 2804 }
748a9306
LW		 2805 else if (curop->op_type == OP_PADSV ||
2806 curop->op_type == OP_PADAV ||
2807 curop->op_type == OP_PADHV ||
2808 curop->op_type == OP_PADANY) {
3280af22 2809 SV **svp = AvARRAY(PL_comppad_name);
8e07c86e 2810 SV *sv = svp[curop->op_targ];
3280af22 2811 if (SvCUR(sv) == PL_generation)
748a9306 2812 break;
3280af22 2813 SvCUR(sv) = PL_generation; /* (SvCUR not used any more) */
748a9306 2814 }
79072805
LW		 2815 else if (curop->op_type == OP_RV2CV)
2816 break;
2817 else if (curop->op_type == OP_RV2SV ||
2818 curop->op_type == OP_RV2AV ||
2819 curop->op_type == OP_RV2HV ||
2820 curop->op_type == OP_RV2GV) {
2821 if (lastop->op_type != OP_GV) /* funny deref? */
2822 break;
2823 }
1167e5da
SM		 2824 else if (curop->op_type == OP_PUSHRE) {
2825 if (((PMOP*)curop)->op_pmreplroot) {
2826 GV *gv = (GV*)((PMOP*)curop)->op_pmreplroot;
3280af22 2827 if (gv == PL_defgv || SvCUR(gv) == PL_generation)
1167e5da 2828 break;
3280af22 2829 SvCUR(gv) = PL_generation;
1167e5da
SM		 2830 }
2831 }
79072805
LW		 2832 else
2833 break;
2834 }
2835 lastop = curop;
2836 }
11343788
MB		 2837 if (curop != o)
2838 o->op_private = OPpASSIGN_COMMON;
79072805 2839 }
c07a80fd 2840 if (right && right->op_type == OP_SPLIT) {
2841 OP* tmpop;
2842 if ((tmpop = ((LISTOP*)right)->op_first) &&
2843 tmpop->op_type == OP_PUSHRE)
2844 {
2845 PMOP *pm = (PMOP*)tmpop;
2846 if (left->op_type == OP_RV2AV &&
2847 !(left->op_private & OPpLVAL_INTRO) &&
11343788 2848 !(o->op_private & OPpASSIGN_COMMON) )
c07a80fd 2849 {
2850 tmpop = ((UNOP*)left)->op_first;
2851 if (tmpop->op_type == OP_GV && !pm->op_pmreplroot) {
2852 pm->op_pmreplroot = (OP*)((GVOP*)tmpop)->op_gv;
2853 pm->op_pmflags |= PMf_ONCE;
11343788 2854 tmpop = cUNOPo->op_first; /* to list (nulled) */
c07a80fd 2855 tmpop = ((UNOP*)tmpop)->op_first; /* to pushmark */
2856 tmpop->op_sibling = Nullop; /* don't free split */
2857 right->op_next = tmpop->op_next; /* fix starting loc */
11343788 2858 op_free(o); /* blow off assign */
54310121 2859 right->op_flags &= ~OPf_WANT;
a5f75d66 2860 /* "I don't know and I don't care." */
c07a80fd 2861 return right;
2862 }
2863 }
2864 else {
3280af22 2865 if (PL_modcount < 10000 &&
c07a80fd 2866 ((LISTOP*)right)->op_last->op_type == OP_CONST)
2867 {
2868 SV *sv = ((SVOP*)((LISTOP*)right)->op_last)->op_sv;
2869 if (SvIVX(sv) == 0)
3280af22 2870 sv_setiv(sv, PL_modcount+1);
c07a80fd 2871 }
2872 }
2873 }
2874 }
11343788 2875 return o;
79072805
LW		 2876 }
2877 if (!right)
2878 right = newOP(OP_UNDEF, 0);
2879 if (right->op_type == OP_READLINE) {
2880 right->op_flags |= OPf_STACKED;
463ee0b2 2881 return newBINOP(OP_NULL, flags, mod(scalar(left), OP_SASSIGN), scalar(right));
79072805 2882 }
a0d0e21e 2883 else {
3280af22 2884 PL_eval_start = right; /* Grandfathering $[ assignment here. Bletch.*/
11343788 2885 o = newBINOP(OP_SASSIGN, flags,
463ee0b2 2886 scalar(right), mod(scalar(left), OP_SASSIGN) );
3280af22
NIS		 2887 if (PL_eval_start)
2888 PL_eval_start = 0;
748a9306 2889 else {
11343788 2890 op_free(o);
a0d0e21e
LW		 2891 return Nullop;
2892 }
2893 }
11343788 2894 return o;
79072805
LW		 2895}
2896
2897OP *
8ac85365 2898newSTATEOP(I32 flags, char *label, OP *o)
79072805 2899{
11343788 2900 dTHR;
bbce6d69 2901 U32 seq = intro_my();
79072805
LW		 2902 register COP *cop;
2903
2904 Newz(1101, cop, 1, COP);
3280af22 2905 if (PERLDB_LINE && PL_curcop->cop_line && PL_curstash != PL_debstash) {
8990e307 2906 cop->op_type = OP_DBSTATE;
22c35a8c 2907 cop->op_ppaddr = PL_ppaddr[ OP_DBSTATE ];
8990e307
LW		 2908 }
2909 else {
2910 cop->op_type = OP_NEXTSTATE;
22c35a8c 2911 cop->op_ppaddr = PL_ppaddr[ OP_NEXTSTATE ];
8990e307 2912 }
79072805 2913 cop->op_flags = flags;
a0ed51b3 2914 cop->op_private = (PL_hints & HINT_UTF8);
ff0cee69 2915#ifdef NATIVE_HINTS
2916 cop->op_private |= NATIVE_HINTS;
2917#endif
e24b16f9 2918 PL_compiling.op_private = cop->op_private;
79072805
LW		 2919 cop->op_next = (OP*)cop;
2920
463ee0b2
LW		 2921 if (label) {
2922 cop->cop_label = label;
3280af22 2923 PL_hints |= HINT_BLOCK_SCOPE;
463ee0b2 2924 }
bbce6d69 2925 cop->cop_seq = seq;
3280af22 2926 cop->cop_arybase = PL_curcop->cop_arybase;
599cee73
PM		 2927 if (PL_curcop->cop_warnings == WARN_NONE
2928 || PL_curcop->cop_warnings == WARN_ALL)
2929 cop->cop_warnings = PL_curcop->cop_warnings ;
2930 else
2931 cop->cop_warnings = newSVsv(PL_curcop->cop_warnings) ;
2932
79072805 2933
3280af22
NIS		 2934 if (PL_copline == NOLINE)
2935 cop->cop_line = PL_curcop->cop_line;
79072805 2936 else {
3280af22
NIS		 2937 cop->cop_line = PL_copline;
2938 PL_copline = NOLINE;
79072805 2939 }
3280af22
NIS		 2940 cop->cop_filegv = (GV*)SvREFCNT_inc(PL_curcop->cop_filegv);
2941 cop->cop_stash = PL_curstash;
79072805 2942
3280af22
NIS		 2943 if (PERLDB_LINE && PL_curstash != PL_debstash) {
2944 SV **svp = av_fetch(GvAV(PL_curcop->cop_filegv),(I32)cop->cop_line, FALSE);
2945 if (svp && *svp != &PL_sv_undef && !SvIOK(*svp)) {
a0d0e21e 2946 (void)SvIOK_on(*svp);
a5f75d66 2947 SvIVX(*svp) = 1;
93a17b20
LW		 2948 SvSTASH(*svp) = (HV*)cop;
2949 }
2950 }
2951
11343788 2952 return prepend_elem(OP_LINESEQ, (OP*)cop, o);
79072805
LW		 2953}
2954
bbce6d69 2955/* "Introduce" my variables to visible status. */
2956U32
8ac85365 2957intro_my(void)
bbce6d69 2958{
2959 SV **svp;
2960 SV *sv;
2961 I32 i;
2962
3280af22
NIS		 2963 if (! PL_min_intro_pending)
2964 return PL_cop_seqmax;
bbce6d69 2965
3280af22
NIS		 2966 svp = AvARRAY(PL_comppad_name);
2967 for (i = PL_min_intro_pending; i <= PL_max_intro_pending; i++) {
2968 if ((sv = svp[i]) && sv != &PL_sv_undef && !SvIVX(sv)) {
c53d7c7d 2969 SvIVX(sv) = PAD_MAX; /* Don't know scope end yet. */
3280af22 2970 SvNVX(sv) = (double)PL_cop_seqmax;
bbce6d69 2971 }
2972 }
3280af22
NIS		 2973 PL_min_intro_pending = 0;
2974 PL_comppad_name_fill = PL_max_intro_pending; /* Needn't search higher */
2975 return PL_cop_seqmax++;
bbce6d69 2976}
2977
79072805 2978OP *
8ac85365 2979newLOGOP(I32 type, I32 flags, OP *first, OP *other)
79072805 2980{
883ffac3
CS		 2981 return new_logop(type, flags, &first, &other);
2982}
2983
3bd495df 2984STATIC OP *
883ffac3
CS		 2985new_logop(I32 type, I32 flags, OP** firstp, OP** otherp)
2986{
11343788 2987 dTHR;
79072805 2988 LOGOP *logop;
11343788 2989 OP *o;
883ffac3
CS		 2990 OP *first = *firstp;
2991 OP *other = *otherp;
79072805 2992
a0d0e21e
LW		 2993 if (type == OP_XOR) /* Not short circuit, but here by precedence. */
2994 return newBINOP(type, flags, scalar(first), scalar(other));
2995
8990e307 2996 scalarboolean(first);
79072805
LW		 2997 /* optimize "!a && b" to "a || b", and "!a || b" to "a && b" */
2998 if (first->op_type == OP_NOT && (first->op_flags & OPf_SPECIAL)) {
2999 if (type == OP_AND || type == OP_OR) {
3000 if (type == OP_AND)
3001 type = OP_OR;
3002 else
3003 type = OP_AND;
11343788 3004 o = first;
883ffac3 3005 first = *firstp = cUNOPo->op_first;
11343788
MB		 3006 if (o->op_next)
3007 first->op_next = o->op_next;
3008 cUNOPo->op_first = Nullop;
3009 op_free(o);
79072805
LW		 3010 }
3011 }
3012 if (first->op_type == OP_CONST) {
599cee73
PM		 3013 if (ckWARN(WARN_PRECEDENCE) && (first->op_private & OPpCONST_BARE))
3014 warner(WARN_PRECEDENCE, "Probable precedence problem on %s",
22c35a8c 3015 PL_op_desc[type]);
79072805
LW		 3016 if ((type == OP_AND) == (SvTRUE(((SVOP*)first)->op_sv))) {
3017 op_free(first);
883ffac3 3018 *firstp = Nullop;
79072805
LW		 3019 return other;
3020 }
3021 else {
3022 op_free(other);
883ffac3 3023 *otherp = Nullop;
79072805
LW		 3024 return first;
3025 }
3026 }
3027 else if (first->op_type == OP_WANTARRAY) {
3028 if (type == OP_AND)
3029 list(other);
3030 else
3031 scalar(other);
3032 }
599cee73 3033 else if (ckWARN(WARN_UNSAFE) && (first->op_flags & OPf_KIDS)) {
a6006777 3034 OP *k1 = ((UNOP*)first)->op_first;
3035 OP *k2 = k1->op_sibling;
3036 OPCODE warnop = 0;
3037 switch (first->op_type)
3038 {
3039 case OP_NULL:
3040 if (k2 && k2->op_type == OP_READLINE
3041 && (k2->op_flags & OPf_STACKED)
55d729e4 3042 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
a6006777 3043 warnop = k2->op_type;
3044 break;
3045
3046 case OP_SASSIGN:
68dc0745 3047 if (k1->op_type == OP_READDIR
3048 || k1->op_type == OP_GLOB
3049 || k1->op_type == OP_EACH)
a6006777 3050 warnop = k1->op_type;
3051 break;
3052 }
8ebc5c01 3053 if (warnop) {
3280af22
NIS		 3054 line_t oldline = PL_curcop->cop_line;
3055 PL_curcop->cop_line = PL_copline;
599cee73
PM		 3056 warner(WARN_UNSAFE,
3057 "Value of %s%s can be \"0\"; test with defined()",
22c35a8c 3058 PL_op_desc[warnop],
68dc0745 3059 ((warnop == OP_READLINE || warnop == OP_GLOB)
3060 ? " construct" : "() operator"));
3280af22 3061 PL_curcop->cop_line = oldline;
8ebc5c01 3062 }
a6006777 3063 }
79072805
LW		 3064
3065 if (!other)
3066 return first;
3067
a0d0e21e
LW		 3068 if (type == OP_ANDASSIGN || type == OP_ORASSIGN)
3069 other->op_private |= OPpASSIGN_BACKWARDS; /* other is an OP_SASSIGN */
3070
79072805
LW		 3071 Newz(1101, logop, 1, LOGOP);
3072
3073 logop->op_type = type;
22c35a8c 3074 logop->op_ppaddr = PL_ppaddr[type];
79072805
LW		 3075 logop->op_first = first;
3076 logop->op_flags = flags | OPf_KIDS;
3077 logop->op_other = LINKLIST(other);
c07a80fd 3078 logop->op_private = 1 | (flags >> 8);
79072805
LW		 3079
3080 /* establish postfix order */
3081 logop->op_next = LINKLIST(first);
3082 first->op_next = (OP*)logop;
3083 first->op_sibling = other;
3084
11343788
MB		 3085 o = newUNOP(OP_NULL, 0, (OP*)logop);
3086 other->op_next = o;
79072805 3087
11343788 3088 return o;
79072805
LW		 3089}
3090
3091OP *
8ac85365 3092newCONDOP(I32 flags, OP *first, OP *trueop, OP *falseop)
79072805 3093{
11343788 3094 dTHR;
79072805 3095 CONDOP *condop;
11343788 3096 OP *o;
79072805 3097
b1cb66bf 3098 if (!falseop)
3099 return newLOGOP(OP_AND, 0, first, trueop);
3100 if (!trueop)
3101 return newLOGOP(OP_OR, 0, first, falseop);
79072805 3102
8990e307 3103 scalarboolean(first);
79072805
LW		 3104 if (first->op_type == OP_CONST) {
3105 if (SvTRUE(((SVOP*)first)->op_sv)) {
3106 op_free(first);
b1cb66bf 3107 op_free(falseop);
3108 return trueop;
79072805
LW		 3109 }
3110 else {
3111 op_free(first);
b1cb66bf 3112 op_free(trueop);
3113 return falseop;
79072805
LW		 3114 }
3115 }
3116 else if (first->op_type == OP_WANTARRAY) {
b1cb66bf 3117 list(trueop);
3118 scalar(falseop);
79072805
LW		 3119 }
3120 Newz(1101, condop, 1, CONDOP);
3121
3122 condop->op_type = OP_COND_EXPR;
22c35a8c 3123 condop->op_ppaddr = PL_ppaddr[OP_COND_EXPR];
79072805
LW		 3124 condop->op_first = first;
3125 condop->op_flags = flags | OPf_KIDS;
b1cb66bf 3126 condop->op_true = LINKLIST(trueop);
3127 condop->op_false = LINKLIST(falseop);
c07a80fd 3128 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3129
3130 /* establish postfix order */
3131 condop->op_next = LINKLIST(first);
3132 first->op_next = (OP*)condop;
3133
b1cb66bf 3134 first->op_sibling = trueop;
3135 trueop->op_sibling = falseop;
11343788 3136 o = newUNOP(OP_NULL, 0, (OP*)condop);
79072805 3137
5dc0d613
MB		 3138 trueop->op_next = o;
3139 falseop->op_next = o;
79072805 3140
11343788 3141 return o;
79072805
LW		 3142}
3143
3144OP *
8ac85365 3145newRANGE(I32 flags, OP *left, OP *right)
79072805 3146{
b35b2403 3147 dTHR;
79072805
LW		 3148 CONDOP *condop;
3149 OP *flip;
3150 OP *flop;
11343788 3151 OP *o;
79072805
LW		 3152
3153 Newz(1101, condop, 1, CONDOP);
3154
3155 condop->op_type = OP_RANGE;
22c35a8c 3156 condop->op_ppaddr = PL_ppaddr[OP_RANGE];
79072805
LW		 3157 condop->op_first = left;
3158 condop->op_flags = OPf_KIDS;
3159 condop->op_true = LINKLIST(left);
3160 condop->op_false = LINKLIST(right);
c07a80fd 3161 condop->op_private = 1 | (flags >> 8);
79072805
LW		 3162
3163 left->op_sibling = right;
3164
3165 condop->op_next = (OP*)condop;
3166 flip = newUNOP(OP_FLIP, flags, (OP*)condop);
3167 flop = newUNOP(OP_FLOP, 0, flip);
11343788 3168 o = newUNOP(OP_NULL, 0, flop);
79072805
LW		 3169 linklist(flop);
3170
3171 left->op_next = flip;
3172 right->op_next = flop;
3173
ed6116ce 3174 condop->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805 3175 sv_upgrade(PAD_SV(condop->op_targ), SVt_PVNV);
ed6116ce 3176 flip->op_targ = pad_alloc(OP_RANGE, SVs_PADMY);
79072805
LW		 3177 sv_upgrade(PAD_SV(flip->op_targ), SVt_PVNV);
3178
3179 flip->op_private = left->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3180 flop->op_private = right->op_type == OP_CONST ? OPpFLIP_LINENUM : 0;
3181
11343788 3182 flip->op_next = o;
79072805 3183 if (!flip->op_private || !flop->op_private)
11343788 3184 linklist(o); /* blow off optimizer unless constant */
79072805 3185
11343788 3186 return o;
79072805
LW		 3187}
3188
3189OP *
8ac85365 3190newLOOPOP(I32 flags, I32 debuggable, OP *expr, OP *block)
79072805 3191{
11343788 3192 dTHR;
463ee0b2 3193 OP* listop;
11343788 3194 OP* o;
463ee0b2 3195 int once = block && block->op_flags & OPf_SPECIAL &&
a0d0e21e 3196 (block->op_type == OP_ENTERSUB || block->op_type == OP_NULL);
93a17b20 3197
463ee0b2
LW		 3198 if (expr) {
3199 if (once && expr->op_type == OP_CONST && !SvTRUE(((SVOP*)expr)->op_sv))
3200 return block; /* do {} while 0 does once */
fb73857a 3201 if (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3202 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB)) {
774d564b 3203 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3204 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3205 } else if (expr->op_flags & OPf_KIDS) {
3206 OP *k1 = ((UNOP*)expr)->op_first;
3207 OP *k2 = (k1) ? k1->op_sibling : NULL;
3208 switch (expr->op_type) {
3209 case OP_NULL:
3210 if (k2 && k2->op_type == OP_READLINE
3211 && (k2->op_flags & OPf_STACKED)
3212 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3213 expr = newUNOP(OP_DEFINED, 0, expr);
3214 break;
3215
3216 case OP_SASSIGN:
3217 if (k1->op_type == OP_READDIR
3218 || k1->op_type == OP_GLOB
3219 || k1->op_type == OP_EACH)
3220 expr = newUNOP(OP_DEFINED, 0, expr);
3221 break;
3222 }
774d564b 3223 }
463ee0b2 3224 }
93a17b20 3225
8990e307 3226 listop = append_elem(OP_LINESEQ, block, newOP(OP_UNSTACK, 0));
883ffac3 3227 o = new_logop(OP_AND, 0, &expr, &listop);
463ee0b2 3228
883ffac3
CS		 3229 if (listop)
3230 ((LISTOP*)listop)->op_last->op_next = LINKLIST(o);
79072805 3231
11343788
MB		 3232 if (once && o != listop)
3233 o->op_next = ((LOGOP*)cUNOPo->op_first)->op_other;
79072805 3234
11343788
MB		 3235 if (o == listop)
3236 o = newUNOP(OP_NULL, 0, o); /* or do {} while 1 loses outer block */
748a9306 3237
11343788
MB		 3238 o->op_flags |= flags;
3239 o = scope(o);
3240 o->op_flags |= OPf_SPECIAL; /* suppress POPBLOCK curpm restoration*/
3241 return o;
79072805
LW		 3242}
3243
3244OP *
8ac85365 3245newWHILEOP(I32 flags, I32 debuggable, LOOP *loop, I32 whileline, OP *expr, OP *block, OP *cont)
79072805 3246{
11343788 3247 dTHR;
79072805
LW		 3248 OP *redo;
3249 OP *next = 0;
3250 OP *listop;
11343788 3251 OP *o;
79072805
LW		 3252 OP *condop;
3253
fb73857a 3254 if (expr && (expr->op_type == OP_READLINE || expr->op_type == OP_GLOB
3255 || (expr->op_type == OP_NULL && expr->op_targ == OP_GLOB))) {
748a9306 3256 expr = newUNOP(OP_DEFINED, 0,
54b9620d 3257 newASSIGNOP(0, newDEFSVOP(), 0, expr) );
55d729e4
GS		 3258 } else if (expr && (expr->op_flags & OPf_KIDS)) {
3259 OP *k1 = ((UNOP*)expr)->op_first;
3260 OP *k2 = (k1) ? k1->op_sibling : NULL;
3261 switch (expr->op_type) {
3262 case OP_NULL:
3263 if (k2 && k2->op_type == OP_READLINE
3264 && (k2->op_flags & OPf_STACKED)
3265 && ((k1->op_flags & OPf_WANT) == OPf_WANT_SCALAR))
3266 expr = newUNOP(OP_DEFINED, 0, expr);
3267 break;
3268
3269 case OP_SASSIGN:
3270 if (k1->op_type == OP_READDIR
3271 || k1->op_type == OP_GLOB
3272 || k1->op_type == OP_EACH)
3273 expr = newUNOP(OP_DEFINED, 0, expr);
3274 break;
3275 }
748a9306 3276 }
79072805
LW		 3277
3278 if (!block)
3279 block = newOP(OP_NULL, 0);
3280
3281 if (cont)
3282 next = LINKLIST(cont);
fb73857a 3283 if (expr) {
79072805 3284 cont = append_elem(OP_LINESEQ, cont, newOP(OP_UNSTACK, 0));
fb73857a 3285 if ((line_t)whileline != NOLINE) {
3280af22 3286 PL_copline = whileline;
fb73857a 3287 cont = append_elem(OP_LINESEQ, cont,
3288 newSTATEOP(0, Nullch, Nullop));
3289 }
3290 }
79072805 3291
463ee0b2 3292 listop = append_list(OP_LINESEQ, (LISTOP*)block, (LISTOP*)cont);
79072805
LW		 3293 redo = LINKLIST(listop);
3294
3295 if (expr) {
3280af22 3296 PL_copline = whileline;
883ffac3
CS		 3297 scalar(listop);
3298 o = new_logop(OP_AND, 0, &expr, &listop);
11343788 3299 if (o == expr && o->op_type == OP_CONST && !SvTRUE(cSVOPo->op_sv)) {
85e6fe83 3300 op_free(expr); /* oops, it's a while (0) */
463ee0b2 3301 op_free((OP*)loop);
883ffac3 3302 return Nullop; /* listop already freed by new_logop */
463ee0b2 3303 }
883ffac3
CS		 3304 if (listop)
3305 ((LISTOP*)listop)->op_last->op_next = condop =
3306 (o == listop ? redo : LINKLIST(o));
79072805
LW		 3307 if (!next)
3308 next = condop;
3309 }
3310 else
11343788 3311 o = listop;
79072805
LW		 3312
3313 if (!loop) {
3314 Newz(1101,loop,1,LOOP);
3315 loop->op_type = OP_ENTERLOOP;
22c35a8c 3316 loop->op_ppaddr = PL_ppaddr[OP_ENTERLOOP];
79072805
LW		 3317 loop->op_private = 0;
3318 loop->op_next = (OP*)loop;
3319 }
3320
11343788 3321 o = newBINOP(OP_LEAVELOOP, 0, (OP*)loop, o);
79072805
LW		 3322
3323 loop->op_redoop = redo;
11343788 3324 loop->op_lastop = o;
79072805
LW		 3325
3326 if (next)
3327 loop->op_nextop = next;
3328 else
11343788 3329 loop->op_nextop = o;
79072805 3330
11343788
MB		 3331 o->op_flags |= flags;
3332 o->op_private |= (flags >> 8);
3333 return o;
79072805
LW		 3334}
3335
3336OP *
8990e307 3337newFOROP(I32 flags,char *label,line_t forline,OP *sv,OP *expr,OP *block,OP *cont)
79072805
LW		 3338{
3339 LOOP *loop;
fb73857a 3340 OP *wop;
85e6fe83 3341 int padoff = 0;
4633a7c4 3342 I32 iterflags = 0;
79072805 3343
79072805 3344 if (sv) {
85e6fe83 3345 if (sv->op_type == OP_RV2SV) { /* symbol table variable */
748a9306 3346 sv->op_type = OP_RV2GV;
22c35a8c 3347 sv->op_ppaddr = PL_ppaddr[OP_RV2GV];
79072805 3348 }
85e6fe83
LW		 3349 else if (sv->op_type == OP_PADSV) { /* private variable */
3350 padoff = sv->op_targ;
3351 op_free(sv);
3352 sv = Nullop;
3353 }
54b9620d
MB		 3354 else if (sv->op_type == OP_THREADSV) { /* per-thread variable */
3355 padoff = sv->op_targ;
3356 iterflags |= OPf_SPECIAL;
3357 op_free(sv);
3358 sv = Nullop;
3359 }
79072805 3360 else
22c35a8c 3361 croak("Can't use %s for loop variable", PL_op_desc[sv->op_type]);
79072805
LW		 3362 }
3363 else {
54b9620d
MB		 3364#ifdef USE_THREADS
3365 padoff = find_threadsv("_");
3366 iterflags |= OPf_SPECIAL;
3367#else
3280af22 3368 sv = newGVOP(OP_GV, 0, PL_defgv);
54b9620d 3369#endif
79072805 3370 }
5f05dabc 3371 if (expr->op_type == OP_RV2AV || expr->op_type == OP_PADAV) {
89ea2908 3372 expr = mod(force_list(scalar(ref(expr, OP_ITER))), OP_GREPSTART);
4633a7c4
LW		 3373 iterflags |= OPf_STACKED;
3374 }
89ea2908
GA		 3375 else if (expr->op_type == OP_NULL &&
3376 (expr->op_flags & OPf_KIDS) &&
3377 ((BINOP*)expr)->op_first->op_type == OP_FLOP)
3378 {
3379 /* Basically turn for($x..$y) into the same as for($x,$y), but we
3380 * set the STACKED flag to indicate that these values are to be
3381 * treated as min/max values by 'pp_iterinit'.
3382 */
3383 UNOP* flip = (UNOP*)((UNOP*)((BINOP*)expr)->op_first)->op_first;
3384 CONDOP* range = (CONDOP*) flip->op_first;
3385 OP* left = range->op_first;
3386 OP* right = left->op_sibling;
5152d7c7 3387 LISTOP* listop;
89ea2908
GA		 3388
3389 range->op_flags &= ~OPf_KIDS;
3390 range->op_first = Nullop;
3391
5152d7c7
GS		 3392 listop = (LISTOP*)newLISTOP(OP_LIST, 0, left, right);
3393 listop->op_first->op_next = range->op_true;
89ea2908 3394 left->op_next = range->op_false;
5152d7c7
GS		 3395 right->op_next = (OP*)listop;
3396 listop->op_next = listop->op_first;
89ea2908
GA		 3397
3398 op_free(expr);
5152d7c7 3399 expr = (OP*)(listop);
89ea2908
GA		 3400 null(expr);
3401 iterflags |= OPf_STACKED;
3402 }
3403 else {
3404 expr = mod(force_list(expr), OP_GREPSTART);
3405 }
3406
3407
4633a7c4 3408 loop = (LOOP*)list(convert(OP_ENTERITER, iterflags,
89ea2908 3409 append_elem(OP_LIST, expr, scalar(sv))));
85e6fe83
LW		 3410 assert(!loop->op_next);
3411 Renew(loop, 1, LOOP);
3412 loop->op_targ = padoff;
fb73857a 3413 wop = newWHILEOP(flags, 1, loop, forline, newOP(OP_ITER, 0), block, cont);
3280af22 3414 PL_copline = forline;
fb73857a 3415 return newSTATEOP(0, label, wop);
79072805
LW		 3416}
3417
8990e307 3418OP*
8ac85365 3419newLOOPEX(I32 type, OP *label)
8990e307 3420{
11343788
MB		 3421 dTHR;
3422 OP *o;
8990e307 3423 if (type != OP_GOTO || label->op_type == OP_CONST) {
cdaebead
MB		 3424 /* "last()" means "last" */
3425 if (label->op_type == OP_STUB && (label->op_flags & OPf_PARENS))
3426 o = newOP(type, OPf_SPECIAL);
3427 else {
3428 o = newPVOP(type, 0, savepv(label->op_type == OP_CONST
3280af22 3429 ? SvPVx(((SVOP*)label)->op_sv, PL_na)
cdaebead
MB		 3430 : ""));
3431 }
8990e307
LW		 3432 op_free(label);
3433 }
3434 else {
a0d0e21e
LW		 3435 if (label->op_type == OP_ENTERSUB)
3436 label = newUNOP(OP_REFGEN, 0, mod(label, OP_REFGEN));
11343788 3437 o = newUNOP(type, OPf_STACKED, label);
8990e307 3438 }
3280af22 3439 PL_hints |= HINT_BLOCK_SCOPE;
11343788 3440 return o;
8990e307
LW		 3441}
3442
79072805 3443void
8ac85365 3444cv_undef(CV *cv)
79072805 3445{
11343788
MB		 3446 dTHR;
3447#ifdef USE_THREADS
e858de61
MB		 3448 if (CvMUTEXP(cv)) {
3449 MUTEX_DESTROY(CvMUTEXP(cv));
3450 Safefree(CvMUTEXP(cv));
3451 CvMUTEXP(cv) = 0;
3452 }
11343788
MB		 3453#endif /* USE_THREADS */
3454
a0d0e21e 3455 if (!CvXSUB(cv) && CvROOT(cv)) {
11343788
MB		 3456#ifdef USE_THREADS
3457 if (CvDEPTH(cv) || (CvOWNER(cv) && CvOWNER(cv) != thr))
3458 croak("Can't undef active subroutine");
3459#else
a0d0e21e
LW		 3460 if (CvDEPTH(cv))
3461 croak("Can't undef active subroutine");
11343788 3462#endif /* USE_THREADS */
8990e307 3463 ENTER;
a0d0e21e 3464
3280af22
NIS		 3465 SAVESPTR(PL_curpad);
3466 PL_curpad = 0;
a0d0e21e 3467
a5f75d66 3468 if (!CvCLONED(cv))
748a9306 3469 op_free(CvROOT(cv));
79072805 3470 CvROOT(cv) = Nullop;
8990e307 3471 LEAVE;
79072805 3472 }
1d5db326 3473 SvPOK_off((SV*)cv); /* forget prototype */
44a8e56a 3474 CvFLAGS(cv) = 0;
8e07c86e
AD		 3475 SvREFCNT_dec(CvGV(cv));
3476 CvGV(cv) = Nullgv;
3477 SvREFCNT_dec(CvOUTSIDE(cv));
3478 CvOUTSIDE(cv) = Nullcv;
3479 if (CvPADLIST(cv)) {
8ebc5c01 3480 /* may be during global destruction */
3481 if (SvREFCNT(CvPADLIST(cv))) {
93965878 3482 I32 i = AvFILLp(CvPADLIST(cv));
8ebc5c01 3483 while (i >= 0) {
3484 SV** svp = av_fetch(CvPADLIST(cv), i--, FALSE);
46fc3d4c 3485 SV* sv = svp ? *svp : Nullsv;
3486 if (!sv)
3487 continue;
3280af22
NIS		 3488 if (sv == (SV*)PL_comppad_name)
3489 PL_comppad_name = Nullav;
3490 else if (sv == (SV*)PL_comppad) {
3491 PL_comppad = Nullav;
3492 PL_curpad = Null(SV**);
46fc3d4c 3493 }
3494 SvREFCNT_dec(sv);
8ebc5c01 3495 }
3496 SvREFCNT_dec((SV*)CvPADLIST(cv));
8e07c86e 3497 }
8e07c86e
AD		 3498 CvPADLIST(cv) = Nullav;
3499 }
79072805
LW		 3500}
3501
5f05dabc 3502#ifdef DEBUG_CLOSURES
76e3520e 3503STATIC void
5f05dabc 3504cv_dump(cv)
3505CV* cv;
3506{
3507 CV *outside = CvOUTSIDE(cv);
3508 AV* padlist = CvPADLIST(cv);
4fdae800 3509 AV* pad_name;
3510 AV* pad;
3511 SV** pname;
3512 SV** ppad;
5f05dabc 3513 I32 ix;
3514
fb73857a 3515 PerlIO_printf(Perl_debug_log, "\tCV=0x%lx (%s), OUTSIDE=0x%lx (%s)\n",
ab50184a
CS		 3516 cv,
3517 (CvANON(cv) ? "ANON"
6b88bc9c 3518 : (cv == PL_main_cv) ? "MAIN"
33b8ce05 3519 : CvUNIQUE(cv) ? "UNIQUE"
44a8e56a 3520 : CvGV(cv) ? GvNAME(CvGV(cv)) : "UNDEFINED"),
ab50184a
CS		 3521 outside,
3522 (!outside ? "null"
3523 : CvANON(outside) ? "ANON"
6b88bc9c 3524 : (outside == PL_main_cv) ? "MAIN"
07055b4c 3525 : CvUNIQUE(outside) ? "UNIQUE"
44a8e56a 3526 : CvGV(outside) ? GvNAME(CvGV(outside)) : "UNDEFINED"));
5f05dabc 3527
4fdae800 3528 if (!padlist)
3529 return;
3530
3531 pad_name = (AV*)*av_fetch(padlist, 0, FALSE);
3532 pad = (AV*)*av_fetch(padlist, 1, FALSE);
3533 pname = AvARRAY(pad_name);
3534 ppad = AvARRAY(pad);
3535
93965878 3536 for (ix = 1; ix <= AvFILLp(pad_name); ix++) {
5f05dabc 3537 if (SvPOK(pname[ix]))
fb73857a 3538 PerlIO_printf(Perl_debug_log, "\t%4d. 0x%lx (%s\"%s\" %ld-%ld)\n",
4fdae800 3539 ix, ppad[ix],
3540 SvFAKE(pname[ix]) ? "FAKE " : "",
3541 SvPVX(pname[ix]),
ab50184a
CS		 3542 (long)I_32(SvNVX(pname[ix])),
3543 (long)SvIVX(pname[ix]));
5f05dabc 3544 }
3545}
3546#endif /* DEBUG_CLOSURES */
3547
76e3520e 3548STATIC CV *
8ac85365 3549cv_clone2(CV *proto, CV *outside)
748a9306 3550{
11343788 3551 dTHR;
748a9306
LW		 3552 AV* av;
3553 I32 ix;
3554 AV* protopadlist = CvPADLIST(proto);
3555 AV* protopad_name = (AV*)*av_fetch(protopadlist, 0, FALSE);
3556 AV* protopad = (AV*)*av_fetch(protopadlist, 1, FALSE);
5f05dabc 3557 SV** pname = AvARRAY(protopad_name);
3558 SV** ppad = AvARRAY(protopad);
93965878
NIS		 3559 I32 fname = AvFILLp(protopad_name);
3560 I32 fpad = AvFILLp(protopad);
748a9306
LW		 3561 AV* comppadlist;
3562 CV* cv;
3563
07055b4c
CS		 3564 assert(!CvUNIQUE(proto));
3565
748a9306 3566 ENTER;
3280af22
NIS		 3567 SAVESPTR(PL_curpad);
3568 SAVESPTR(PL_comppad);
3569 SAVESPTR(PL_comppad_name);
3570 SAVESPTR(PL_compcv);
748a9306 3571
3280af22 3572 cv = PL_compcv = (CV*)NEWSV(1104,0);
fa83b5b6 3573 sv_upgrade((SV *)cv, SvTYPE(proto));
a5f75d66 3574 CvCLONED_on(cv);
5f05dabc 3575 if (CvANON(proto))
3576 CvANON_on(cv);
748a9306 3577
11343788 3578#ifdef USE_THREADS
12ca11f6 3579 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 3580 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 3581 CvOWNER(cv) = 0;
3582#endif /* USE_THREADS */
748a9306 3583 CvFILEGV(cv) = CvFILEGV(proto);
44a8e56a 3584 CvGV(cv) = (GV*)SvREFCNT_inc(CvGV(proto));
748a9306
LW		 3585 CvSTASH(cv) = CvSTASH(proto);
3586 CvROOT(cv) = CvROOT(proto);
3587 CvSTART(cv) = CvSTART(proto);
5f05dabc 3588 if (outside)
3589 CvOUTSIDE(cv) = (CV*)SvREFCNT_inc(outside);
748a9306 3590
68dc0745 3591 if (SvPOK(proto))
3592 sv_setpvn((SV*)cv, SvPVX(proto), SvCUR(proto));
3593
3280af22 3594 PL_comppad_name = newAV();
46fc3d4c 3595 for (ix = fname; ix >= 0; ix--)
3280af22 3596 av_store(PL_comppad_name, ix, SvREFCNT_inc(pname[ix]));
748a9306 3597
3280af22 3598 PL_comppad = newAV();
748a9306
LW		 3599
3600 comppadlist = newAV();
3601 AvREAL_off(comppadlist);
3280af22
NIS		 3602 av_store(comppadlist, 0, (SV*)PL_comppad_name);
3603 av_store(comppadlist, 1, (SV*)PL_comppad);
748a9306 3604 CvPADLIST(cv) = comppadlist;
3280af22
NIS		 3605 av_fill(PL_comppad, AvFILLp(protopad));
3606 PL_curpad = AvARRAY(PL_comppad);
748a9306
LW		 3607
3608 av = newAV(); /* will be @_ */
3609 av_extend(av, 0);
3280af22 3610 av_store(PL_comppad, 0, (SV*)av);
748a9306
LW		 3611 AvFLAGS(av) = AVf_REIFY;
3612
9607fc9c 3613 for (ix = fpad; ix > 0; ix--) {
3614 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
3280af22 3615 if (namesv && namesv != &PL_sv_undef) {
aa689395 3616 char *name = SvPVX(namesv); /* XXX */
3617 if (SvFLAGS(namesv) & SVf_FAKE) { /* lexical from outside? */
3618 I32 off = pad_findlex(name, ix, SvIVX(namesv),
155fc61f 3619 CvOUTSIDE(cv), cxstack_ix, 0);
5f05dabc 3620 if (!off)
3280af22 3621 PL_curpad[ix] = SvREFCNT_inc(ppad[ix]);
5f05dabc 3622 else if (off != ix)
748a9306
LW		 3623 croak("panic: cv_clone: %s", name);
3624 }
3625 else { /* our own lexical */
aa689395 3626 SV* sv;
5f05dabc 3627 if (*name == '&') {
3628 /* anon code -- we'll come back for it */
3629 sv = SvREFCNT_inc(ppad[ix]);
3630 }
3631 else if (*name == '@')
3632 sv = (SV*)newAV();
748a9306 3633 else if (*name == '%')
5f05dabc 3634 sv = (SV*)newHV();
748a9306 3635 else
5f05dabc 3636 sv = NEWSV(0,0);
3637 if (!SvPADBUSY(sv))
3638 SvPADMY_on(sv);
3280af22 3639 PL_curpad[ix] = sv;
748a9306
LW		 3640 }
3641 }
3642 else {
aa689395 3643 SV* sv = NEWSV(0,0);
748a9306 3644 SvPADTMP_on(sv);
3280af22 3645 PL_curpad[ix] = sv;
748a9306
LW		 3646 }
3647 }
3648
5f05dabc 3649 /* Now that vars are all in place, clone nested closures. */
3650
9607fc9c 3651 for (ix = fpad; ix > 0; ix--) {
3652 SV* namesv = (ix <= fname) ? pname[ix] : Nullsv;
aa689395 3653 if (namesv
3280af22 3654 && namesv != &PL_sv_undef
aa689395 3655 && !(SvFLAGS(namesv) & SVf_FAKE)
3656 && *SvPVX(namesv) == '&'
5f05dabc 3657 && CvCLONE(ppad[ix]))
3658 {
3659 CV *kid = cv_clone2((CV*)ppad[ix], cv);
3660 SvREFCNT_dec(ppad[ix]);
3661 CvCLONE_on(kid);
3662 SvPADMY_on(kid);
3280af22 3663 PL_curpad[ix] = (SV*)kid;
748a9306
LW		 3664 }
3665 }
3666
5f05dabc 3667#ifdef DEBUG_CLOSURES
ab50184a
CS		 3668 PerlIO_printf(Perl_debug_log, "Cloned inside:\n");
3669 cv_dump(outside);
3670 PerlIO_printf(Perl_debug_log, " from:\n");
5f05dabc 3671 cv_dump(proto);
ab50184a 3672 PerlIO_printf(Perl_debug_log, " to:\n");
5f05dabc 3673 cv_dump(cv);
3674#endif
3675
748a9306
LW		 3676 LEAVE;
3677 return cv;
3678}
3679
3680CV *
8ac85365 3681cv_clone(CV *proto)
5f05dabc 3682{
3683 return cv_clone2(proto, CvOUTSIDE(proto));
3684}
3685
3fe9a6f1 3686void
8ac85365 3687cv_ckproto(CV *cv, GV *gv, char *p)
3fe9a6f1 3688{
3689 if ((!p != !SvPOK(cv)) || (p && strNE(p, SvPVX(cv)))) {
46fc3d4c 3690 SV* msg = sv_newmortal();
3fe9a6f1 3691 SV* name = Nullsv;
3692
3693 if (gv)
46fc3d4c 3694 gv_efullname3(name = sv_newmortal(), gv, Nullch);
3695 sv_setpv(msg, "Prototype mismatch:");
3696 if (name)
fc36a67e 3697 sv_catpvf(msg, " sub %_", name);
3fe9a6f1 3698 if (SvPOK(cv))
46fc3d4c 3699 sv_catpvf(msg, " (%s)", SvPVX(cv));
3700 sv_catpv(msg, " vs ");
3701 if (p)
3702 sv_catpvf(msg, "(%s)", p);
3703 else
3704 sv_catpv(msg, "none");
fc36a67e 3705 warn("%_", msg);
3fe9a6f1 3706 }
3707}
3708
760ac839 3709SV *
8ac85365 3710cv_const_sv(CV *cv)
760ac839 3711{
54310121 3712 if (!cv || !SvPOK(cv) || SvCUR(cv))
3713 return Nullsv;
fe5e78ed
GS		 3714 return op_const_sv(CvSTART(cv), cv);
3715}
760ac839 3716
fe5e78ed
GS		 3717SV *
3718op_const_sv(OP *o, CV *cv)
3719{
3720 SV *sv = Nullsv;
3721
3722 if(!o)
3723 return Nullsv;
3724
3725 if(o->op_type == OP_LINESEQ && cLISTOPo->op_first)
3726 o = cLISTOPo->op_first->op_sibling;
3727
3728 for (; o; o = o->op_next) {
54310121 3729 OPCODE type = o->op_type;
fe5e78ed
GS		 3730
3731 if(sv && o->op_next == o)
3732 return sv;
54310121 3733 if (type == OP_NEXTSTATE || type == OP_NULL || type == OP_PUSHMARK)
3734 continue;
3735 if (type == OP_LEAVESUB || type == OP_RETURN)
3736 break;
3737 if (sv)
3738 return Nullsv;
3739 if (type == OP_CONST)
5dc0d613 3740 sv = cSVOPo->op_sv;
fe5e78ed 3741 else if (type == OP_PADSV && cv) {
e858de61
MB		 3742 AV* padav = (AV*)(AvARRAY(CvPADLIST(cv))[1]);
3743 sv = padav ? AvARRAY(padav)[o->op_targ] : Nullsv;
5aabfad6 3744 if (!sv || (!SvREADONLY(sv) && SvREFCNT(sv) > 1))
54310121 3745 return Nullsv;
760ac839 3746 }
54310121 3747 else
3748 return Nullsv;
760ac839 3749 }
5aabfad6 3750 if (sv)
3751 SvREADONLY_on(sv);
760ac839
LW		 3752 return sv;
3753}
3754
748a9306 3755CV *
8ac85365 3756newSUB(I32 floor, OP *o, OP *proto, OP *block)
79072805 3757{
11343788 3758 dTHR;
3280af22 3759 char *name = o ? SvPVx(cSVOPo->op_sv, PL_na) : Nullch;
55d729e4
GS		 3760 GV *gv = gv_fetchpv(name ? name : "__ANON__",
3761 GV_ADDMULTI | (block ? 0 : GV_NOINIT), SVt_PVCV);
3280af22 3762 char *ps = proto ? SvPVx(((SVOP*)proto)->op_sv, PL_na) : Nullch;
a2008d6d 3763 register CV *cv=0;
a0d0e21e 3764 I32 ix;
79072805 3765
11343788 3766 if (o)
5dc0d613 3767 SAVEFREEOP(o);
3fe9a6f1 3768 if (proto)
3769 SAVEFREEOP(proto);
3770
55d729e4
GS		 3771 if (SvTYPE(gv) != SVt_PVGV) { /* Prototype now, and had
3772 maximum a prototype before. */
3773 if (SvTYPE(gv) > SVt_NULL) {
3774 if (!SvPOK((SV*)gv) && !(SvIOK((SV*)gv) && SvIVX((SV*)gv) == -1))
3775 warn("Runaway prototype");
3776 cv_ckproto((CV*)gv, NULL, ps);
3777 }
3778 if (ps)
3779 sv_setpv((SV*)gv, ps);
3780 else
3781 sv_setiv((SV*)gv, -1);
3280af22
NIS		 3782 SvREFCNT_dec(PL_compcv);
3783 cv = PL_compcv = NULL;
3784 PL_sub_generation++;
55d729e4
GS		 3785 goto noblock;
3786 }
3787
68dc0745 3788 if (!name || GvCVGEN(gv))
3789 cv = Nullcv;
3790 else if (cv = GvCV(gv)) {
3fe9a6f1 3791 cv_ckproto(cv, gv, ps);
68dc0745 3792 /* already defined (or promised)? */
3793 if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
3794 SV* const_sv;
fe5e78ed 3795 bool const_changed = TRUE;
aa689395 3796 if (!block) {
3797 /* just a "sub foo;" when &foo is already defined */
3280af22 3798 SAVEFREESV(PL_compcv);
aa689395 3799 goto done;
3800 }
7bac28a0 3801 /* ahem, death to those who redefine active sort subs */
3280af22 3802 if (PL_curstackinfo->si_type == PERLSI_SORT && PL_sortcop == CvSTART(cv))
7bac28a0 3803 croak("Can't redefine active sort subroutine %s", name);
fe5e78ed
GS		 3804 if(const_sv = cv_const_sv(cv))
3805 const_changed = sv_cmp(const_sv, op_const_sv(block, Nullcv));
599cee73
PM		 3806 if ((const_sv && const_changed) || ckWARN(WARN_REDEFINE)
3807 && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 3808 && HvNAME(GvSTASH(CvGV(cv)))
3809 && strEQ(HvNAME(GvSTASH(CvGV(cv))),
3810 "autouse"))) {
3280af22
NIS		 3811 line_t oldline = PL_curcop->cop_line;
3812 PL_curcop->cop_line = PL_copline;
599cee73
PM		 3813 warner(WARN_REDEFINE,
3814 const_sv ? "Constant subroutine %s redefined"
3815 : "Subroutine %s redefined", name);
3280af22 3816 PL_curcop->cop_line = oldline;
79072805 3817 }
8990e307 3818 SvREFCNT_dec(cv);
68dc0745 3819 cv = Nullcv;
79072805
LW		 3820 }
3821 }
a0d0e21e 3822 if (cv) { /* must reuse cv if autoloaded */
4633a7c4 3823 cv_undef(cv);
3280af22
NIS		 3824 CvFLAGS(cv) = CvFLAGS(PL_compcv);
3825 CvOUTSIDE(cv) = CvOUTSIDE(PL_compcv);
3826 CvOUTSIDE(PL_compcv) = 0;
3827 CvPADLIST(cv) = CvPADLIST(PL_compcv);
3828 CvPADLIST(PL_compcv) = 0;
3829 if (SvREFCNT(PL_compcv) > 1) /* XXX Make closures transit through stub. */
3830 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc((SV*)cv);
3831 SvREFCNT_dec(PL_compcv);
a0d0e21e
LW		 3832 }
3833 else {
3280af22 3834 cv = PL_compcv;
44a8e56a 3835 if (name) {
3836 GvCV(gv) = cv;
3837 GvCVGEN(gv) = 0;
3280af22 3838 PL_sub_generation++;
44a8e56a 3839 }
a0d0e21e 3840 }
44a8e56a 3841 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22
NIS		 3842 CvFILEGV(cv) = PL_curcop->cop_filegv;
3843 CvSTASH(cv) = PL_curstash;
11343788
MB		 3844#ifdef USE_THREADS
3845 CvOWNER(cv) = 0;
1cfa4ec7 3846 if (!CvMUTEXP(cv)) {
f6aaf501 3847 New(666, CvMUTEXP(cv), 1, perl_mutex);
1cfa4ec7
GS		 3848 MUTEX_INIT(CvMUTEXP(cv));
3849 }
11343788 3850#endif /* USE_THREADS */
8990e307 3851
3fe9a6f1 3852 if (ps)
3853 sv_setpv((SV*)cv, ps);
4633a7c4 3854
3280af22 3855 if (PL_error_count) {
c07a80fd 3856 op_free(block);
3857 block = Nullop;
68dc0745 3858 if (name) {
3859 char *s = strrchr(name, ':');
3860 s = s ? s+1 : name;
6d4c2119
CS		 3861 if (strEQ(s, "BEGIN")) {
3862 char *not_safe =
3863 "BEGIN not safe after errors--compilation aborted";
3280af22 3864 if (PL_in_eval & 4)
6d4c2119
CS		 3865 croak(not_safe);
3866 else {
3867 /* force display of errors found but not reported */
38a03e6e 3868 sv_catpv(ERRSV, not_safe);
3280af22 3869 croak("%s", SvPVx(ERRSV, PL_na));
6d4c2119
CS		 3870 }
3871 }
68dc0745 3872 }
c07a80fd 3873 }
a0d0e21e 3874 if (!block) {
55d729e4 3875 noblock:
3280af22 3876 PL_copline = NOLINE;
a0d0e21e
LW		 3877 LEAVE_SCOPE(floor);
3878 return cv;
3879 }
3880
3280af22
NIS		 3881 if (AvFILLp(PL_comppad_name) < AvFILLp(PL_comppad))
3882 av_store(PL_comppad_name, AvFILLp(PL_comppad), Nullsv);
a0d0e21e 3883
54310121 3884 if (CvCLONE(cv)) {
3280af22
NIS		 3885 SV **namep = AvARRAY(PL_comppad_name);
3886 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
54310121 3887 SV *namesv;
3888
3280af22 3889 if (SvIMMORTAL(PL_curpad[ix]))
54310121 3890 continue;
3891 /*
3892 * The only things that a clonable function needs in its
3893 * pad are references to outer lexicals and anonymous subs.
3894 * The rest are created anew during cloning.
3895 */
3896 if (!((namesv = namep[ix]) != Nullsv &&
3280af22 3897 namesv != &PL_sv_undef &&
54310121 3898 (SvFAKE(namesv) ||
3899 *SvPVX(namesv) == '&')))
3900 {
3280af22
NIS		 3901 SvREFCNT_dec(PL_curpad[ix]);
3902 PL_curpad[ix] = Nullsv;
54310121 3903 }
3904 }
a0d0e21e 3905 }
54310121 3906 else {
3907 AV *av = newAV(); /* Will be @_ */
3908 av_extend(av, 0);
3280af22 3909 av_store(PL_comppad, 0, (SV*)av);
54310121 3910 AvFLAGS(av) = AVf_REIFY;
79072805 3911
3280af22
NIS		 3912 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
3913 if (SvIMMORTAL(PL_curpad[ix]))
54310121 3914 continue;
3280af22
NIS		 3915 if (!SvPADMY(PL_curpad[ix]))
3916 SvPADTMP_on(PL_curpad[ix]);
54310121 3917 }
3918 }
79072805 3919
a0d0e21e 3920 CvROOT(cv) = newUNOP(OP_LEAVESUB, 0, scalarseq(block));
79072805
LW		 3921 CvSTART(cv) = LINKLIST(CvROOT(cv));
3922 CvROOT(cv)->op_next = 0;
3923 peep(CvSTART(cv));
93a17b20 3924
44a8e56a 3925 if (name) {
3926 char *s;
3927
3280af22 3928 if (PERLDB_SUBLINE && PL_curstash != PL_debstash) {
46fc3d4c 3929 SV *sv = NEWSV(0,0);
44a8e56a 3930 SV *tmpstr = sv_newmortal();
549bb64a 3931 GV *db_postponed = gv_fetchpv("DB::postponed", GV_ADDMULTI, SVt_PVHV);
44a8e56a 3932 CV *cv;
3933 HV *hv;
3934
51790459 3935 sv_setpvf(sv, "%_:%ld-%ld",
3280af22
NIS		 3936 GvSV(PL_curcop->cop_filegv),
3937 (long)PL_subline, (long)PL_curcop->cop_line);
44a8e56a 3938 gv_efullname3(tmpstr, gv, Nullch);
3280af22 3939 hv_store(GvHV(PL_DBsub), SvPVX(tmpstr), SvCUR(tmpstr), sv, 0);
44a8e56a 3940 hv = GvHVn(db_postponed);
9607fc9c 3941 if (HvFILL(hv) > 0 && hv_exists(hv, SvPVX(tmpstr), SvCUR(tmpstr))
3942 && (cv = GvCV(db_postponed))) {
44a8e56a 3943 dSP;
924508f0 3944 PUSHMARK(SP);
44a8e56a 3945 XPUSHs(tmpstr);
3946 PUTBACK;
3947 perl_call_sv((SV*)cv, G_DISCARD);
3948 }
3949 }
79072805 3950
44a8e56a 3951 if ((s = strrchr(name,':')))
28757baa 3952 s++;
3953 else
3954 s = name;
68dc0745 3955 if (strEQ(s, "BEGIN")) {
3280af22 3956 I32 oldscope = PL_scopestack_ix;
28757baa 3957 ENTER;
3280af22
NIS		 3958 SAVESPTR(PL_compiling.cop_filegv);
3959 SAVEI16(PL_compiling.cop_line);
3960 save_svref(&PL_rs);
3961 sv_setsv(PL_rs, PL_nrs);
28757baa 3962
3280af22
NIS		 3963 if (!PL_beginav)
3964 PL_beginav = newAV();
28757baa 3965 DEBUG_x( dump_sub(gv) );
3280af22 3966 av_push(PL_beginav, (SV *)cv);
28757baa 3967 GvCV(gv) = 0;
3280af22 3968 call_list(oldscope, PL_beginav);
a6006777 3969
3280af22 3970 PL_curcop = &PL_compiling;
a0ed51b3 3971 PL_compiling.op_private = PL_hints;
28757baa 3972 LEAVE;
3973 }
3280af22
NIS		 3974 else if (strEQ(s, "END") && !PL_error_count) {
3975 if (!PL_endav)
3976 PL_endav = newAV();
3977 av_unshift(PL_endav, 1);
3978 av_store(PL_endav, 0, (SV *)cv);
28757baa 3979 GvCV(gv) = 0;
3980 }
3280af22
NIS		 3981 else if (strEQ(s, "INIT") && !PL_error_count) {
3982 if (!PL_initav)
3983 PL_initav = newAV();
3984 av_push(PL_initav, SvREFCNT_inc(cv));
b7aad4fe 3985 GvCV(gv) = 0;
ae77835f 3986 }
79072805 3987 }
a6006777 3988
aa689395 3989 done:
3280af22 3990 PL_copline = NOLINE;
8990e307 3991 LEAVE_SCOPE(floor);
a0d0e21e 3992 return cv;
79072805
LW		 3993}
3994
5476c433
JD		 3995void
3996newCONSTSUB(HV *stash, char *name, SV *sv)
3997{
3998 dTHR;
3280af22
NIS		 3999 U32 oldhints = PL_hints;
4000 HV *old_cop_stash = PL_curcop->cop_stash;
4001 HV *old_curstash = PL_curstash;
4002 line_t oldline = PL_curcop->cop_line;
4003 PL_curcop->cop_line = PL_copline;
5476c433 4004
3280af22 4005 PL_hints &= ~HINT_BLOCK_SCOPE;
5476c433 4006 if(stash)
3280af22 4007 PL_curstash = PL_curcop->cop_stash = stash;
5476c433
JD		 4008
4009 newSUB(
be24f278 4010 start_subparse(FALSE, 0),
5476c433 4011 newSVOP(OP_CONST, 0, newSVpv(name,0)),
6b88bc9c 4012 newSVOP(OP_CONST, 0, &PL_sv_no), /* SvPV(&PL_sv_no) == "" -- GMB */
5476c433
JD		 4013 newSTATEOP(0, Nullch, newSVOP(OP_CONST, 0, sv))
4014 );
4015
3280af22
NIS		 4016 PL_hints = oldhints;
4017 PL_curcop->cop_stash = old_cop_stash;
4018 PL_curstash = old_curstash;
4019 PL_curcop->cop_line = oldline;
5476c433
JD		 4020}
4021
57d3b86d 4022CV *
e3b8966e 4023newXS(char *name, void (*subaddr) (CV * _CPERLproto), char *filename)
a0d0e21e 4024{
11343788 4025 dTHR;
44a8e56a 4026 GV *gv = gv_fetchpv(name ? name : "__ANON__", GV_ADDMULTI, SVt_PVCV);
79072805 4027 register CV *cv;
44a8e56a 4028
4029 if (cv = (name ? GvCV(gv) : Nullcv)) {
4030 if (GvCVGEN(gv)) {
4031 /* just a cached method */
4032 SvREFCNT_dec(cv);
4033 cv = 0;
4034 }
4035 else if (CvROOT(cv) || CvXSUB(cv) || GvASSUMECV(gv)) {
4036 /* already defined (or promised) */
599cee73 4037 if (ckWARN(WARN_REDEFINE) && !(CvGV(cv) && GvSTASH(CvGV(cv))
2f34f9d4
IZ		 4038 && HvNAME(GvSTASH(CvGV(cv)))
4039 && strEQ(HvNAME(GvSTASH(CvGV(cv))), "autouse"))) {
3280af22 4040 line_t oldline = PL_curcop->cop_line;
51f6edd3
GS		 4041 if (PL_copline != NOLINE)
4042 PL_curcop->cop_line = PL_copline;
599cee73 4043 warner(WARN_REDEFINE, "Subroutine %s redefined",name);
3280af22 4044 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 4045 }
4046 SvREFCNT_dec(cv);
4047 cv = 0;
79072805 4048 }
79072805 4049 }
44a8e56a 4050
4051 if (cv) /* must reuse cv if autoloaded */
4052 cv_undef(cv);
a0d0e21e
LW		 4053 else {
4054 cv = (CV*)NEWSV(1105,0);
4055 sv_upgrade((SV *)cv, SVt_PVCV);
44a8e56a 4056 if (name) {
4057 GvCV(gv) = cv;
4058 GvCVGEN(gv) = 0;
3280af22 4059 PL_sub_generation++;
44a8e56a 4060 }
a0d0e21e 4061 }
5196be3e 4062 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
11343788 4063#ifdef USE_THREADS
12ca11f6 4064 New(666, CvMUTEXP(cv), 1, perl_mutex);
11343788 4065 MUTEX_INIT(CvMUTEXP(cv));
11343788
MB		 4066 CvOWNER(cv) = 0;
4067#endif /* USE_THREADS */
79072805 4068 CvFILEGV(cv) = gv_fetchfile(filename);
a0d0e21e 4069 CvXSUB(cv) = subaddr;
44a8e56a 4070
28757baa 4071 if (name) {
4072 char *s = strrchr(name,':');
4073 if (s)
4074 s++;
4075 else
4076 s = name;
4077 if (strEQ(s, "BEGIN")) {
3280af22
NIS		 4078 if (!PL_beginav)
4079 PL_beginav = newAV();
4080 av_push(PL_beginav, (SV *)cv);
44a8e56a 4081 GvCV(gv) = 0;
28757baa 4082 }
4083 else if (strEQ(s, "END")) {
3280af22
NIS		 4084 if (!PL_endav)
4085 PL_endav = newAV();
4086 av_unshift(PL_endav, 1);
4087 av_store(PL_endav, 0, (SV *)cv);
44a8e56a 4088 GvCV(gv) = 0;
28757baa 4089 }
7d07dbc2 4090 else if (strEQ(s, "INIT")) {
3280af22
NIS		 4091 if (!PL_initav)
4092 PL_initav = newAV();
4093 av_push(PL_initav, (SV *)cv);
f8f842e4 4094 GvCV(gv) = 0;
ae77835f 4095 }
28757baa 4096 }
8990e307 4097 else
a5f75d66 4098 CvANON_on(cv);
44a8e56a 4099
a0d0e21e 4100 return cv;
79072805
LW		 4101}
4102
4103void
8ac85365 4104newFORM(I32 floor, OP *o, OP *block)
79072805 4105{
11343788 4106 dTHR;
79072805
LW		 4107 register CV *cv;
4108 char *name;
4109 GV *gv;
a0d0e21e 4110 I32 ix;
79072805 4111
11343788 4112 if (o)
3280af22 4113 name = SvPVx(cSVOPo->op_sv, PL_na);
79072805
LW		 4114 else
4115 name = "STDOUT";
85e6fe83 4116 gv = gv_fetchpv(name,TRUE, SVt_PVFM);
a5f75d66 4117 GvMULTI_on(gv);
79072805 4118 if (cv = GvFORM(gv)) {
599cee73 4119 if (ckWARN(WARN_REDEFINE)) {
3280af22 4120 line_t oldline = PL_curcop->cop_line;
79072805 4121
3280af22 4122 PL_curcop->cop_line = PL_copline;
599cee73 4123 warner(WARN_REDEFINE, "Format %s redefined",name);
3280af22 4124 PL_curcop->cop_line = oldline;
79072805 4125 }
8990e307 4126 SvREFCNT_dec(cv);
79072805 4127 }
3280af22 4128 cv = PL_compcv;
79072805 4129 GvFORM(gv) = cv;
44a8e56a 4130 CvGV(cv) = (GV*)SvREFCNT_inc(gv);
3280af22 4131 CvFILEGV(cv) = PL_curcop->cop_filegv;
79072805 4132
3280af22
NIS		 4133 for (ix = AvFILLp(PL_comppad); ix > 0; ix--) {
4134 if (!SvPADMY(PL_curpad[ix]) && !SvIMMORTAL(PL_curpad[ix]))
4135 SvPADTMP_on(PL_curpad[ix]);
a0d0e21e
LW		 4136 }
4137
79072805
LW		 4138 CvROOT(cv) = newUNOP(OP_LEAVEWRITE, 0, scalarseq(block));
4139 CvSTART(cv) = LINKLIST(CvROOT(cv));
4140 CvROOT(cv)->op_next = 0;
4141 peep(CvSTART(cv));
11343788 4142 op_free(o);
3280af22 4143 PL_copline = NOLINE;
8990e307 4144 LEAVE_SCOPE(floor);
79072805
LW		 4145}
4146
4147OP *
8ac85365 4148newANONLIST(OP *o)
79072805 4149{
93a17b20 4150 return newUNOP(OP_REFGEN, 0,
11343788 4151 mod(list(convert(OP_ANONLIST, 0, o)), OP_REFGEN));
79072805
LW		 4152}
4153
4154OP *
8ac85365 4155newANONHASH(OP *o)
79072805 4156{
93a17b20 4157 return newUNOP(OP_REFGEN, 0,
11343788 4158 mod(list(convert(OP_ANONHASH, 0, o)), OP_REFGEN));
a0d0e21e
LW		 4159}
4160
4161OP *
8ac85365 4162newANONSUB(I32 floor, OP *proto, OP *block)
a0d0e21e
LW		 4163{
4164 return newUNOP(OP_REFGEN, 0,
4633a7c4 4165 newSVOP(OP_ANONCODE, 0, (SV*)newSUB(floor, 0, proto, block)));
79072805
LW		 4166}
4167
4168OP *
8ac85365 4169oopsAV(OP *o)
79072805 4170{
ed6116ce
LW		 4171 switch (o->op_type) {
4172 case OP_PADSV:
4173 o->op_type = OP_PADAV;
22c35a8c 4174 o->op_ppaddr = PL_ppaddr[OP_PADAV];
51e247a3 4175 return ref(o, OP_RV2AV);
ed6116ce
LW		 4176
4177 case OP_RV2SV:
79072805 4178 o->op_type = OP_RV2AV;
22c35a8c 4179 o->op_ppaddr = PL_ppaddr[OP_RV2AV];
79072805 4180 ref(o, OP_RV2AV);
ed6116ce
LW		 4181 break;
4182
4183 default:
79072805 4184 warn("oops: oopsAV");
ed6116ce
LW		 4185 break;
4186 }
79072805
LW		 4187 return o;
4188}
4189
4190OP *
8ac85365 4191oopsHV(OP *o)
79072805 4192{
ed6116ce
LW		 4193 switch (o->op_type) {
4194 case OP_PADSV:
4195 case OP_PADAV:
4196 o->op_type = OP_PADHV;
22c35a8c 4197 o->op_ppaddr = PL_ppaddr[OP_PADHV];
51e247a3 4198 return ref(o, OP_RV2HV);
ed6116ce
LW		 4199
4200 case OP_RV2SV:
4201 case OP_RV2AV:
79072805 4202 o->op_type = OP_RV2HV;
22c35a8c 4203 o->op_ppaddr = PL_ppaddr[OP_RV2HV];
79072805 4204 ref(o, OP_RV2HV);
ed6116ce
LW		 4205 break;
4206
4207 default:
79072805 4208 warn("oops: oopsHV");
ed6116ce
LW		 4209 break;
4210 }
79072805
LW		 4211 return o;
4212}
4213
4214OP *
8ac85365 4215newAVREF(OP *o)
79072805 4216{
ed6116ce
LW		 4217 if (o->op_type == OP_PADANY) {
4218 o->op_type = OP_PADAV;
22c35a8c 4219 o->op_ppaddr = PL_ppaddr[OP_PADAV];
93a17b20 4220 return o;
ed6116ce 4221 }
79072805
LW		 4222 return newUNOP(OP_RV2AV, 0, scalar(o));
4223}
4224
4225OP *
8ac85365 4226newGVREF(I32 type, OP *o)
79072805 4227{
a0d0e21e
LW		 4228 if (type == OP_MAPSTART)
4229 return newUNOP(OP_NULL, 0, o);
748a9306 4230 return ref(newUNOP(OP_RV2GV, OPf_REF, o), type);
79072805
LW		 4231}
4232
4233OP *
8ac85365 4234newHVREF(OP *o)
79072805 4235{
ed6116ce
LW		 4236 if (o->op_type == OP_PADANY) {
4237 o->op_type = OP_PADHV;
22c35a8c 4238 o->op_ppaddr = PL_ppaddr[OP_PADHV];
93a17b20 4239 return o;
ed6116ce 4240 }
79072805
LW		 4241 return newUNOP(OP_RV2HV, 0, scalar(o));
4242}
4243
4244OP *
8ac85365 4245oopsCV(OP *o)
79072805 4246{
463ee0b2 4247 croak("NOT IMPL LINE %d",__LINE__);
79072805
LW		 4248 /* STUB */
4249 return o;
4250}
4251
4252OP *
8ac85365 4253newCVREF(I32 flags, OP *o)
79072805 4254{
c07a80fd 4255 return newUNOP(OP_RV2CV, flags, scalar(o));
79072805
LW		 4256}
4257
4258OP *
8ac85365 4259newSVREF(OP *o)
79072805 4260{
ed6116ce
LW		 4261 if (o->op_type == OP_PADANY) {
4262 o->op_type = OP_PADSV;
22c35a8c 4263 o->op_ppaddr = PL_ppaddr[OP_PADSV];
93a17b20 4264 return o;
ed6116ce 4265 }
224a4551
MB		 4266 else if (o->op_type == OP_THREADSV && !(o->op_flags & OPpDONE_SVREF)) {
4267 o->op_flags |= OPpDONE_SVREF;
a863c7d1 4268 return o;
224a4551 4269 }
79072805
LW		 4270 return newUNOP(OP_RV2SV, 0, scalar(o));
4271}
4272
4273/* Check routines. */
4274
4275OP *
8ac85365 4276ck_anoncode(OP *o)
5f05dabc 4277{
178c6305
CS		 4278 PADOFFSET ix;
4279 SV* name;
4280
4281 name = NEWSV(1106,0);
4282 sv_upgrade(name, SVt_PVNV);
4283 sv_setpvn(name, "&", 1);
4284 SvIVX(name) = -1;
4285 SvNVX(name) = 1;
5dc0d613 4286 ix = pad_alloc(o->op_type, SVs_PADMY);
3280af22
NIS		 4287 av_store(PL_comppad_name, ix, name);
4288 av_store(PL_comppad, ix, cSVOPo->op_sv);
5dc0d613
MB		 4289 SvPADMY_on(cSVOPo->op_sv);
4290 cSVOPo->op_sv = Nullsv;
4291 cSVOPo->op_targ = ix;
4292 return o;
5f05dabc 4293}
4294
4295OP *
8ac85365 4296ck_bitop(OP *o)
55497cff 4297{
3280af22 4298 o->op_private = PL_hints;
5dc0d613 4299 return o;
55497cff 4300}
4301
4302OP *
8ac85365 4303ck_concat(OP *o)
79072805 4304{
11343788
MB		 4305 if (cUNOPo->op_first->op_type == OP_CONCAT)
4306 o->op_flags |= OPf_STACKED;
4307 return o;
79072805
LW		 4308}
4309
4310OP *
8ac85365 4311ck_spair(OP *o)
79072805 4312{
11343788 4313 if (o->op_flags & OPf_KIDS) {
79072805 4314 OP* newop;
a0d0e21e 4315 OP* kid;
5dc0d613
MB		 4316 OPCODE type = o->op_type;
4317 o = modkids(ck_fun(o), type);
11343788 4318 kid = cUNOPo->op_first;
a0d0e21e
LW		 4319 newop = kUNOP->op_first->op_sibling;
4320 if (newop &&
4321 (newop->op_sibling ||
22c35a8c 4322 !(PL_opargs[newop->op_type] & OA_RETSCALAR) ||
a0d0e21e
LW		 4323 newop->op_type == OP_PADAV || newop->op_type == OP_PADHV ||
4324 newop->op_type == OP_RV2AV || newop->op_type == OP_RV2HV)) {
aeea060c 4325
11343788 4326 return o;
a0d0e21e
LW		 4327 }
4328 op_free(kUNOP->op_first);
4329 kUNOP->op_first = newop;
4330 }
22c35a8c 4331 o->op_ppaddr = PL_ppaddr[++o->op_type];
11343788 4332 return ck_fun(o);
a0d0e21e
LW		 4333}
4334
4335OP *
8ac85365 4336ck_delete(OP *o)
a0d0e21e 4337{
11343788 4338 o = ck_fun(o);
5dc0d613 4339 o->op_private = 0;
11343788
MB		 4340 if (o->op_flags & OPf_KIDS) {
4341 OP *kid = cUNOPo->op_first;
5f05dabc 4342 if (kid->op_type == OP_HSLICE)
5dc0d613 4343 o->op_private |= OPpSLICE;
5f05dabc 4344 else if (kid->op_type != OP_HELEM)
4345 croak("%s argument is not a HASH element or slice",
22c35a8c 4346 PL_op_desc[o->op_type]);
a0d0e21e 4347 null(kid);
79072805 4348 }
11343788 4349 return o;
79072805
LW		 4350}
4351
4352OP *
8ac85365 4353ck_eof(OP *o)
79072805 4354{
11343788 4355 I32 type = o->op_type;
79072805 4356
11343788
MB		 4357 if (o->op_flags & OPf_KIDS) {
4358 if (cLISTOPo->op_first->op_type == OP_STUB) {
4359 op_free(o);
4360 o = newUNOP(type, OPf_SPECIAL,
d58bf5aa 4361 newGVOP(OP_GV, 0, gv_fetchpv("main::ARGV", TRUE, SVt_PVAV)));
8990e307 4362 }
11343788 4363 return ck_fun(o);
79072805 4364 }
11343788 4365 return o;
79072805
LW		 4366}
4367
4368OP *
8ac85365 4369ck_eval(OP *o)
79072805 4370{
3280af22 4371 PL_hints |= HINT_BLOCK_SCOPE;
11343788
MB		 4372 if (o->op_flags & OPf_KIDS) {
4373 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 4374
93a17b20 4375 if (!kid) {
11343788
MB		 4376 o->op_flags &= ~OPf_KIDS;
4377 null(o);
79072805
LW		 4378 }
4379 else if (kid->op_type == OP_LINESEQ) {
4380 LOGOP *enter;
4381
11343788
MB		 4382 kid->op_next = o->op_next;
4383 cUNOPo->op_first = 0;
4384 op_free(o);
79072805
LW		 4385
4386 Newz(1101, enter, 1, LOGOP);
4387 enter->op_type = OP_ENTERTRY;
22c35a8c 4388 enter->op_ppaddr = PL_ppaddr[OP_ENTERTRY];
79072805
LW		 4389 enter->op_private = 0;
4390
4391 /* establish postfix order */
4392 enter->op_next = (OP*)enter;
4393
11343788
MB		 4394 o = prepend_elem(OP_LINESEQ, (OP*)enter, (OP*)kid);
4395 o->op_type = OP_LEAVETRY;
22c35a8c 4396 o->op_ppaddr = PL_ppaddr[OP_LEAVETRY];
11343788
MB		 4397 enter->op_other = o;
4398 return o;
79072805 4399 }
c7cc6f1c 4400 else
473986ff 4401 scalar((OP*)kid);
79072805
LW		 4402 }
4403 else {
11343788 4404 op_free(o);
54b9620d 4405 o = newUNOP(OP_ENTEREVAL, 0, newDEFSVOP());
79072805 4406 }
3280af22 4407 o->op_targ = (PADOFFSET)PL_hints;
11343788 4408 return o;
79072805
LW		 4409}
4410
4411OP *
8ac85365 4412ck_exec(OP *o)
79072805
LW		 4413{
4414 OP *kid;
11343788
MB		 4415 if (o->op_flags & OPf_STACKED) {
4416 o = ck_fun(o);
4417 kid = cUNOPo->op_first->op_sibling;
8990e307
LW		 4418 if (kid->op_type == OP_RV2GV)
4419 null(kid);
79072805 4420 }
463ee0b2 4421 else
11343788
MB		 4422 o = listkids(o);
4423 return o;
79072805
LW		 4424}
4425
4426OP *
8ac85365 4427ck_exists(OP *o)
5f05dabc 4428{
5196be3e
MB		 4429 o = ck_fun(o);
4430 if (o->op_flags & OPf_KIDS) {
4431 OP *kid = cUNOPo->op_first;
5f05dabc 4432 if (kid->op_type != OP_HELEM)
22c35a8c 4433 croak("%s argument is not a HASH element", PL_op_desc[o->op_type]);
5f05dabc 4434 null(kid);
4435 }
5196be3e 4436 return o;
5f05dabc 4437}
4438
22c35a8c 4439#if 0
5f05dabc 4440OP *
8ac85365 4441ck_gvconst(register OP *o)
79072805
LW		 4442{
4443 o = fold_constants(o);
4444 if (o->op_type == OP_CONST)
4445 o->op_type = OP_GV;
4446 return o;
4447}
22c35a8c 4448#endif
79072805
LW		 4449
4450OP *
8ac85365 4451ck_rvconst(register OP *o)
79072805 4452{
11343788
MB		 4453 dTHR;
4454 SVOP *kid = (SVOP*)cUNOPo->op_first;
85e6fe83 4455
3280af22 4456 o->op_private |= (PL_hints & HINT_STRICT_REFS);
79072805 4457 if (kid->op_type == OP_CONST) {
44a8e56a 4458 char *name;
4459 int iscv;
4460 GV *gv;
779c5bc9 4461 SV *kidsv = kid->op_sv;
44a8e56a 4462
779c5bc9
GS		 4463 /* Is it a constant from cv_const_sv()? */
4464 if (SvROK(kidsv) && SvREADONLY(kidsv)) {
4465 SV *rsv = SvRV(kidsv);
4466 int svtype = SvTYPE(rsv);
4467 char *badtype = Nullch;
4468
4469 switch (o->op_type) {
4470 case OP_RV2SV:
4471 if (svtype > SVt_PVMG)
4472 badtype = "a SCALAR";
4473 break;
4474 case OP_RV2AV:
4475 if (svtype != SVt_PVAV)
4476 badtype = "an ARRAY";
4477 break;
4478 case OP_RV2HV:
4479 if (svtype != SVt_PVHV) {
4480 if (svtype == SVt_PVAV) { /* pseudohash? */
4481 SV **ksv = av_fetch((AV*)rsv, 0, FALSE);
4482 if (ksv && SvROK(*ksv)
4483 && SvTYPE(SvRV(*ksv)) == SVt_PVHV)
4484 {
4485 break;
4486 }
4487 }
4488 badtype = "a HASH";
4489 }
4490 break;
4491 case OP_RV2CV:
4492 if (svtype != SVt_PVCV)
4493 badtype = "a CODE";
4494 break;
4495 }
4496 if (badtype)
4497 croak("Constant is not %s reference", badtype);
4498 return o;
4499 }
4500 name = SvPV(kidsv, PL_na);
3280af22 4501 if ((PL_hints & HINT_STRICT_REFS) && (kid->op_private & OPpCONST_BARE)) {
44a8e56a 4502 char *badthing = Nullch;
5dc0d613 4503 switch (o->op_type) {
44a8e56a 4504 case OP_RV2SV:
4505 badthing = "a SCALAR";
4506 break;
4507 case OP_RV2AV:
4508 badthing = "an ARRAY";
4509 break;
4510 case OP_RV2HV:
4511 badthing = "a HASH";
4512 break;
4513 }
4514 if (badthing)
4515 croak(
4516 "Can't use bareword (\"%s\") as %s ref while \"strict refs\" in use",
4517 name, badthing);
4518 }
93233ece
CS		 4519 /*
4520 * This is a little tricky. We only want to add the symbol if we
4521 * didn't add it in the lexer. Otherwise we get duplicate strict
4522 * warnings. But if we didn't add it in the lexer, we must at
4523 * least pretend like we wanted to add it even if it existed before,
4524 * or we get possible typo warnings. OPpCONST_ENTERED says
4525 * whether the lexer already added THIS instance of this symbol.
4526 */
5196be3e 4527 iscv = (o->op_type == OP_RV2CV) * 2;
93233ece 4528 do {
44a8e56a 4529 gv = gv_fetchpv(name,
748a9306 4530 iscv | !(kid->op_private & OPpCONST_ENTERED),
a0d0e21e
LW		 4531 iscv
4532 ? SVt_PVCV
11343788 4533 : o->op_type == OP_RV2SV
a0d0e21e 4534 ? SVt_PV
11343788 4535 : o->op_type == OP_RV2AV
a0d0e21e 4536 ? SVt_PVAV
11343788 4537 : o->op_type == OP_RV2HV
a0d0e21e
LW		 4538 ? SVt_PVHV
4539 : SVt_PVGV);
93233ece
CS		 4540 } while (!gv && !(kid->op_private & OPpCONST_ENTERED) && !iscv++);
4541 if (gv) {
4542 kid->op_type = OP_GV;
4543 SvREFCNT_dec(kid->op_sv);
4544 kid->op_sv = SvREFCNT_inc(gv);
a0d0e21e 4545 }
79072805 4546 }
11343788 4547 return o;
79072805
LW		 4548}
4549
4550OP *
8ac85365 4551ck_ftst(OP *o)
79072805 4552{
11343788
MB		 4553 dTHR;
4554 I32 type = o->op_type;
79072805 4555
11343788
MB		 4556 if (o->op_flags & OPf_REF)
4557 return o;
79072805 4558
108ed793 4559 if (o->op_flags & OPf_KIDS && cUNOPo->op_first->op_type != OP_STUB) {
11343788 4560 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805
LW		 4561
4562 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
a0d0e21e 4563 OP *newop = newGVOP(type, OPf_REF,
3280af22 4564 gv_fetchpv(SvPVx(kid->op_sv, PL_na), TRUE, SVt_PVIO));
11343788 4565 op_free(o);
79072805
LW		 4566 return newop;
4567 }
4568 }
4569 else {
11343788 4570 op_free(o);
79072805 4571 if (type == OP_FTTTY)
fb73857a 4572 return newGVOP(type, OPf_REF, gv_fetchpv("main::STDIN", TRUE,
85e6fe83 4573 SVt_PVIO));
79072805 4574 else
54b9620d 4575 return newUNOP(type, 0, newDEFSVOP());
79072805 4576 }
11343788 4577 return o;
79072805
LW		 4578}
4579
4580OP *
8ac85365 4581ck_fun(OP *o)
79072805 4582{
11343788 4583 dTHR;
79072805
LW		 4584 register OP *kid;
4585 OP **tokid;
4586 OP *sibl;
4587 I32 numargs = 0;
11343788 4588 int type = o->op_type;
22c35a8c 4589 register I32 oa = PL_opargs[type] >> OASHIFT;
aeea060c 4590
11343788 4591 if (o->op_flags & OPf_STACKED) {
79072805
LW		 4592 if ((oa & OA_OPTIONAL) && (oa >> 4) && !((oa >> 4) & OA_OPTIONAL))
4593 oa &= ~OA_OPTIONAL;
4594 else
11343788 4595 return no_fh_allowed(o);
79072805
LW		 4596 }
4597
11343788
MB		 4598 if (o->op_flags & OPf_KIDS) {
4599 tokid = &cLISTOPo->op_first;
4600 kid = cLISTOPo->op_first;
8990e307
LW		 4601 if (kid->op_type == OP_PUSHMARK ||
4602 kid->op_type == OP_NULL && kid->op_targ == OP_PUSHMARK)
4603 {
79072805
LW		 4604 tokid = &kid->op_sibling;
4605 kid = kid->op_sibling;
4606 }
22c35a8c 4607 if (!kid && PL_opargs[type] & OA_DEFGV)
54b9620d 4608 *tokid = kid = newDEFSVOP();
79072805
LW		 4609
4610 while (oa && kid) {
4611 numargs++;
4612 sibl = kid->op_sibling;
4613 switch (oa & 7) {
4614 case OA_SCALAR:
4615 scalar(kid);
4616 break;
4617 case OA_LIST:
4618 if (oa < 16) {
4619 kid = 0;
4620 continue;
4621 }
4622 else
4623 list(kid);
4624 break;
4625 case OA_AVREF:
4626 if (kid->op_type == OP_CONST &&
4627 (kid->op_private & OPpCONST_BARE)) {
3280af22 4628 char *name = SvPVx(((SVOP*)kid)->op_sv, PL_na);
79072805 4629 OP *newop = newAVREF(newGVOP(OP_GV, 0,
85e6fe83 4630 gv_fetchpv(name, TRUE, SVt_PVAV) ));
599cee73
PM		 4631 if (ckWARN(WARN_SYNTAX))
4632 warner(WARN_SYNTAX,
4633 "Array @%s missing the @ in argument %ld of %s()",
22c35a8c 4634 name, (long)numargs, PL_op_desc[type]);
79072805
LW		 4635 op_free(kid);
4636 kid = newop;
4637 kid->op_sibling = sibl;
4638 *tokid = kid;
4639 }
8990e307 4640 else if (kid->op_type != OP_RV2AV && kid->op_type != OP_PADAV)
22c35a8c 4641 bad_type(numargs, "array", PL_op_desc[o->op_type], kid);
a0d0e21e 4642 mod(kid, type);
79072805
LW		 4643 break;
4644 case OA_HVREF:
4645 if (kid->op_type == OP_CONST &&
4646 (kid->op_private & OPpCONST_BARE)) {
3280af22 4647 char *name = SvPVx(((SVOP*)kid)->op_sv, PL_na);
79072805 4648 OP *newop = newHVREF(newGVOP(OP_GV, 0,
85e6fe83 4649 gv_fetchpv(name, TRUE, SVt_PVHV) ));
599cee73
PM		 4650 if (ckWARN(WARN_SYNTAX))
4651 warner(WARN_SYNTAX,
4652 "Hash %%%s missing the %% in argument %ld of %s()",
22c35a8c 4653 name, (long)numargs, PL_op_desc[type]);
79072805
LW		 4654 op_free(kid);
4655 kid = newop;
4656 kid->op_sibling = sibl;
4657 *tokid = kid;
4658 }
8990e307 4659 else if (kid->op_type != OP_RV2HV && kid->op_type != OP_PADHV)
22c35a8c 4660 bad_type(numargs, "hash", PL_op_desc[o->op_type], kid);
a0d0e21e 4661 mod(kid, type);
79072805
LW		 4662 break;
4663 case OA_CVREF:
4664 {
a0d0e21e 4665 OP *newop = newUNOP(OP_NULL, 0, kid);
79072805
LW		 4666 kid->op_sibling = 0;
4667 linklist(kid);
4668 newop->op_next = newop;
4669 kid = newop;
4670 kid->op_sibling = sibl;
4671 *tokid = kid;
4672 }
4673 break;
4674 case OA_FILEREF:
c340be78 4675 if (kid->op_type != OP_GV && kid->op_type != OP_RV2GV) {
79072805
LW		 4676 if (kid->op_type == OP_CONST &&
4677 (kid->op_private & OPpCONST_BARE)) {
4678 OP *newop = newGVOP(OP_GV, 0,
3280af22 4679 gv_fetchpv(SvPVx(((SVOP*)kid)->op_sv, PL_na), TRUE,
85e6fe83 4680 SVt_PVIO) );
79072805
LW		 4681 op_free(kid);
4682 kid = newop;
4683 }
1ea32a52
GS		 4684 else if (kid->op_type == OP_READLINE) {
4685 /* neophyte patrol: open(<FH>), close(<FH>) etc. */
4686 bad_type(numargs, "HANDLE", PL_op_desc[o->op_type], kid);
4687 }
79072805
LW		 4688 else {
4689 kid->op_sibling = 0;
4690 kid = newUNOP(OP_RV2GV, 0, scalar(kid));
4691 }
4692 kid->op_sibling = sibl;
4693 *tokid = kid;
4694 }
4695 scalar(kid);
4696 break;
4697 case OA_SCALARREF:
a0d0e21e 4698 mod(scalar(kid), type);
79072805
LW		 4699 break;
4700 }
4701 oa >>= 4;
4702 tokid = &kid->op_sibling;
4703 kid = kid->op_sibling;
4704 }
11343788 4705 o->op_private |= numargs;
79072805 4706 if (kid)
22c35a8c 4707 return too_many_arguments(o,PL_op_desc[o->op_type]);
11343788 4708 listkids(o);
79072805 4709 }
22c35a8c 4710 else if (PL_opargs[type] & OA_DEFGV) {
11343788 4711 op_free(o);
54b9620d 4712 return newUNOP(type, 0, newDEFSVOP());
a0d0e21e
LW		 4713 }
4714
79072805
LW		 4715 if (oa) {
4716 while (oa & OA_OPTIONAL)
4717 oa >>= 4;
4718 if (oa && oa != OA_LIST)
22c35a8c 4719 return too_few_arguments(o,PL_op_desc[o->op_type]);
79072805 4720 }
11343788 4721 return o;
79072805
LW		 4722}
4723
4724OP *
8ac85365 4725ck_glob(OP *o)
79072805 4726{
fb73857a 4727 GV *gv;
4728
1f2bfc8a 4729 if ((o->op_flags & OPf_KIDS) && !cLISTOPo->op_first->op_sibling)
54b9620d 4730 append_elem(OP_GLOB, o, newDEFSVOP());
fb73857a 4731
4732 if (!((gv = gv_fetchpv("glob", FALSE, SVt_PVCV)) && GvIMPORTED_CV(gv)))
4733 gv = gv_fetchpv("CORE::GLOBAL::glob", FALSE, SVt_PVCV);
b1cb66bf 4734
4735 if (gv && GvIMPORTED_CV(gv)) {
46fc3d4c 4736 static int glob_index;
4737
5196be3e 4738 append_elem(OP_GLOB, o,
46fc3d4c 4739 newSVOP(OP_CONST, 0, newSViv(glob_index++)));
1f2bfc8a 4740 o->op_type = OP_LIST;
22c35a8c 4741 o->op_ppaddr = PL_ppaddr[OP_LIST];
1f2bfc8a 4742 cLISTOPo->op_first->op_type = OP_PUSHMARK;
22c35a8c 4743 cLISTOPo->op_first->op_ppaddr = PL_ppaddr[OP_PUSHMARK];
1f2bfc8a 4744 o = newUNOP(OP_ENTERSUB, OPf_STACKED,
aeea060c 4745 append_elem(OP_LIST, o,
1f2bfc8a
MB		 4746 scalar(newUNOP(OP_RV2CV, 0,
4747 newGVOP(OP_GV, 0, gv)))));
d58bf5aa
MB		 4748 o = newUNOP(OP_NULL, 0, ck_subr(o));
4749 o->op_targ = OP_GLOB; /* hint at what it used to be */
4750 return o;
b1cb66bf 4751 }
4752 gv = newGVgen("main");
a0d0e21e 4753 gv_IOadd(gv);
11343788
MB		 4754 append_elem(OP_GLOB, o, newGVOP(OP_GV, 0, gv));
4755 scalarkids(o);
4756 return ck_fun(o);
79072805
LW		 4757}
4758
4759OP *
8ac85365 4760ck_grep(OP *o)
79072805
LW		 4761{
4762 LOGOP *gwop;
4763 OP *kid;
11343788 4764 OPCODE type = o->op_type == OP_GREPSTART ? OP_GREPWHILE : OP_MAPWHILE;
79072805 4765
22c35a8c 4766 o->op_ppaddr = PL_ppaddr[OP_GREPSTART];
a0d0e21e 4767 Newz(1101, gwop, 1, LOGOP);
aeea060c 4768
11343788 4769 if (o->op_flags & OPf_STACKED) {
a0d0e21e 4770 OP* k;
11343788
MB		 4771 o = ck_sort(o);
4772 kid = cLISTOPo->op_first->op_sibling;
4773 for (k = cLISTOPo->op_first->op_sibling->op_next; k; k = k->op_next) {
a0d0e21e
LW		 4774 kid = k;
4775 }
4776 kid->op_next = (OP*)gwop;
11343788 4777 o->op_flags &= ~OPf_STACKED;
93a17b20 4778 }
11343788 4779 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e
LW		 4780 if (type == OP_MAPWHILE)
4781 list(kid);
4782 else
4783 scalar(kid);
11343788 4784 o = ck_fun(o);
3280af22 4785 if (PL_error_count)
11343788 4786 return o;
aeea060c 4787 kid = cLISTOPo->op_first->op_sibling;
79072805 4788 if (kid->op_type != OP_NULL)
463ee0b2 4789 croak("panic: ck_grep");
79072805
LW		 4790 kid = kUNOP->op_first;
4791
a0d0e21e 4792 gwop->op_type = type;
22c35a8c 4793 gwop->op_ppaddr = PL_ppaddr[type];
11343788 4794 gwop->op_first = listkids(o);
79072805
LW		 4795 gwop->op_flags |= OPf_KIDS;
4796 gwop->op_private = 1;
4797 gwop->op_other = LINKLIST(kid);
a0d0e21e 4798 gwop->op_targ = pad_alloc(type, SVs_PADTMP);
79072805
LW		 4799 kid->op_next = (OP*)gwop;
4800
11343788 4801 kid = cLISTOPo->op_first->op_sibling;
a0d0e21e 4802 if (!kid || !kid->op_sibling)
22c35a8c 4803 return too_few_arguments(o,PL_op_desc[o->op_type]);
a0d0e21e
LW		 4804 for (kid = kid->op_sibling; kid; kid = kid->op_sibling)
4805 mod(kid, OP_GREPSTART);
4806
79072805
LW		 4807 return (OP*)gwop;
4808}
4809
4810OP *
8ac85365 4811ck_index(OP *o)
79072805 4812{
11343788
MB		 4813 if (o->op_flags & OPf_KIDS) {
4814 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
0b71040e
LW		 4815 if (kid)
4816 kid = kid->op_sibling; /* get past "big" */
79072805 4817 if (kid && kid->op_type == OP_CONST)
2779dcf1 4818 fbm_compile(((SVOP*)kid)->op_sv, 0);
79072805 4819 }
11343788 4820 return ck_fun(o);
79072805
LW		 4821}
4822
4823OP *
8ac85365 4824ck_lengthconst(OP *o)
79072805
LW		 4825{
4826 /* XXX length optimization goes here */
11343788 4827 return ck_fun(o);
79072805
LW		 4828}
4829
4830OP *
8ac85365 4831ck_lfun(OP *o)
79072805 4832{
5dc0d613
MB		 4833 OPCODE type = o->op_type;
4834 return modkids(ck_fun(o), type);
79072805
LW		 4835}
4836
4837OP *
8ac85365 4838ck_rfun(OP *o)
8990e307 4839{
5dc0d613
MB		 4840 OPCODE type = o->op_type;
4841 return refkids(ck_fun(o), type);
8990e307
LW		 4842}
4843
4844OP *
8ac85365 4845ck_listiob(OP *o)
79072805
LW		 4846{
4847 register OP *kid;
aeea060c 4848
11343788 4849 kid = cLISTOPo->op_first;
79072805 4850 if (!kid) {
11343788
MB		 4851 o = force_list(o);
4852 kid = cLISTOPo->op_first;
79072805
LW		 4853 }
4854 if (kid->op_type == OP_PUSHMARK)
4855 kid = kid->op_sibling;
11343788 4856 if (kid && o->op_flags & OPf_STACKED)
79072805
LW		 4857 kid = kid->op_sibling;
4858 else if (kid && !kid->op_sibling) { /* print HANDLE; */
4859 if (kid->op_type == OP_CONST && kid->op_private & OPpCONST_BARE) {
11343788 4860 o->op_flags |= OPf_STACKED; /* make it a filehandle */
748a9306 4861 kid = newUNOP(OP_RV2GV, OPf_REF, scalar(kid));
11343788
MB		 4862 cLISTOPo->op_first->op_sibling = kid;
4863 cLISTOPo->op_last = kid;
79072805
LW		 4864 kid = kid->op_sibling;
4865 }
4866 }
4867
4868 if (!kid)
54b9620d 4869 append_elem(o->op_type, o, newDEFSVOP());
79072805 4870
5dc0d613 4871 o = listkids(o);
bbce6d69 4872
5dc0d613 4873 o->op_private = 0;
36477c24 4874#ifdef USE_LOCALE
3280af22 4875 if (PL_hints & HINT_LOCALE)
5dc0d613 4876 o->op_private |= OPpLOCALE;
bbce6d69 4877#endif
4878
5dc0d613 4879 return o;
bbce6d69 4880}
4881
4882OP *
8ac85365 4883ck_fun_locale(OP *o)
bbce6d69 4884{
5dc0d613 4885 o = ck_fun(o);
bbce6d69 4886
5dc0d613 4887 o->op_private = 0;
36477c24 4888#ifdef USE_LOCALE
3280af22 4889 if (PL_hints & HINT_LOCALE)
5dc0d613 4890 o->op_private |= OPpLOCALE;
bbce6d69 4891#endif
4892
5dc0d613 4893 return o;
bbce6d69 4894}
4895
4896OP *
8ac85365 4897ck_scmp(OP *o)
bbce6d69 4898{
5dc0d613 4899 o->op_private = 0;
36477c24 4900#ifdef USE_LOCALE
3280af22 4901 if (PL_hints & HINT_LOCALE)
5dc0d613 4902 o->op_private |= OPpLOCALE;
bbce6d69 4903#endif
36477c24 4904
5dc0d613 4905 return o;
79072805
LW		 4906}
4907
4908OP *
8ac85365 4909ck_match(OP *o)
79072805 4910{
5dc0d613 4911 o->op_private |= OPpRUNTIME;
11343788 4912 return o;
79072805
LW		 4913}
4914
4915OP *
8ac85365 4916ck_null(OP *o)
79072805 4917{
11343788 4918 return o;
79072805
LW		 4919}
4920
4921OP *
8ac85365 4922ck_repeat(OP *o)
79072805 4923{
11343788
MB		 4924 if (cBINOPo->op_first->op_flags & OPf_PARENS) {
4925 o->op_private |= OPpREPEAT_DOLIST;
4926 cBINOPo->op_first = force_list(cBINOPo->op_first);
79072805
LW		 4927 }
4928 else
11343788
MB		 4929 scalar(o);
4930 return o;
79072805
LW		 4931}
4932
4933OP *
8ac85365 4934ck_require(OP *o)
8990e307 4935{
11343788
MB		 4936 if (o->op_flags & OPf_KIDS) { /* Shall we supply missing .pm? */
4937 SVOP *kid = (SVOP*)cUNOPo->op_first;
8990e307
LW		 4938
4939 if (kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE)) {
8990e307 4940 char *s;
a0d0e21e
LW		 4941 for (s = SvPVX(kid->op_sv); *s; s++) {
4942 if (*s == ':' && s[1] == ':') {
4943 *s = '/';
1aef975c 4944 Move(s+2, s+1, strlen(s+2)+1, char);
a0d0e21e
LW		 4945 --SvCUR(kid->op_sv);
4946 }
8990e307 4947 }
a0d0e21e 4948 sv_catpvn(kid->op_sv, ".pm", 3);
8990e307
LW		 4949 }
4950 }
11343788 4951 return ck_fun(o);
8990e307
LW		 4952}
4953
22c35a8c 4954#if 0
8990e307 4955OP *
8ac85365 4956ck_retarget(OP *o)
79072805 4957{
463ee0b2 4958 croak("NOT IMPL LINE %d",__LINE__);
79072805 4959 /* STUB */
11343788 4960 return o;
79072805 4961}
22c35a8c 4962#endif
79072805
LW		 4963
4964OP *
8ac85365 4965ck_select(OP *o)
79072805 4966{
c07a80fd 4967 OP* kid;
11343788
MB		 4968 if (o->op_flags & OPf_KIDS) {
4969 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
2304df62 4970 if (kid && kid->op_sibling) {
11343788 4971 o->op_type = OP_SSELECT;
22c35a8c 4972 o->op_ppaddr = PL_ppaddr[OP_SSELECT];
11343788
MB		 4973 o = ck_fun(o);
4974 return fold_constants(o);
79072805
LW		 4975 }
4976 }
11343788
MB		 4977 o = ck_fun(o);
4978 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
c07a80fd 4979 if (kid && kid->op_type == OP_RV2GV)
4980 kid->op_private &= ~HINT_STRICT_REFS;
11343788 4981 return o;
79072805
LW		 4982}
4983
4984OP *
8ac85365 4985ck_shift(OP *o)
79072805 4986{
11343788 4987 I32 type = o->op_type;
79072805 4988
11343788 4989 if (!(o->op_flags & OPf_KIDS)) {
6d4ff0d2
MB		 4990 OP *argop;
4991
11343788 4992 op_free(o);
6d4ff0d2 4993#ifdef USE_THREADS
533c011a 4994 if (!CvUNIQUE(PL_compcv)) {
6d4ff0d2 4995 argop = newOP(OP_PADAV, OPf_REF);
6b88bc9c 4996 argop->op_targ = 0; /* PL_curpad[0] is @_ */
6d4ff0d2
MB		 4997 }
4998 else {
4999 argop = newUNOP(OP_RV2AV, 0,
5000 scalar(newGVOP(OP_GV, 0,
5001 gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
5002 }
5003#else
5004 argop = newUNOP(OP_RV2AV, 0,
3280af22
NIS		 5005 scalar(newGVOP(OP_GV, 0, !CvUNIQUE(PL_compcv) ?
5006 PL_defgv : gv_fetchpv("ARGV", TRUE, SVt_PVAV))));
6d4ff0d2
MB		 5007#endif /* USE_THREADS */
5008 return newUNOP(type, 0, scalar(argop));
79072805 5009 }
11343788 5010 return scalar(modkids(ck_fun(o), type));
79072805
LW		 5011}
5012
5013OP *
8ac85365 5014ck_sort(OP *o)
79072805 5015{
5dc0d613 5016 o->op_private = 0;
36477c24 5017#ifdef USE_LOCALE
3280af22 5018 if (PL_hints & HINT_LOCALE)
5dc0d613 5019 o->op_private |= OPpLOCALE;
bbce6d69 5020#endif
5021
11343788
MB		 5022 if (o->op_flags & OPf_STACKED) {
5023 OP *kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
463ee0b2
LW		 5024 OP *k;
5025 kid = kUNOP->op_first; /* get past rv2gv */
79072805 5026
463ee0b2 5027 if (kid->op_type == OP_SCOPE || kid->op_type == OP_LEAVE) {
79072805 5028 linklist(kid);
463ee0b2
LW		 5029 if (kid->op_type == OP_SCOPE) {
5030 k = kid->op_next;
5031 kid->op_next = 0;
79072805 5032 }
463ee0b2 5033 else if (kid->op_type == OP_LEAVE) {
11343788 5034 if (o->op_type == OP_SORT) {
748a9306
LW		 5035 null(kid); /* wipe out leave */
5036 kid->op_next = kid;
463ee0b2 5037
748a9306
LW		 5038 for (k = kLISTOP->op_first->op_next; k; k = k->op_next) {
5039 if (k->op_next == kid)
5040 k->op_next = 0;
5041 }
463ee0b2 5042 }
748a9306
LW		 5043 else
5044 kid->op_next = 0; /* just disconnect the leave */
a0d0e21e 5045 k = kLISTOP->op_first;
463ee0b2 5046 }
a0d0e21e
LW		 5047 peep(k);
5048
11343788 5049 kid = cLISTOPo->op_first->op_sibling; /* get past pushmark */
8990e307 5050 null(kid); /* wipe out rv2gv */
11343788 5051 if (o->op_type == OP_SORT)
a0d0e21e
LW		 5052 kid->op_next = kid;
5053 else
5054 kid->op_next = k;
11343788 5055 o->op_flags |= OPf_SPECIAL;
79072805 5056 }
c6e96bcb
GS		 5057 else if (kid->op_type == OP_RV2SV || kid->op_type == OP_PADSV)
5058 null(cLISTOPo->op_first->op_sibling);
79072805 5059 }
bbce6d69 5060
11343788 5061 return o;
79072805
LW		 5062}
5063
5064OP *
8ac85365 5065ck_split(OP *o)
79072805
LW		 5066{
5067 register OP *kid;
aeea060c 5068
11343788
MB		 5069 if (o->op_flags & OPf_STACKED)
5070 return no_fh_allowed(o);
79072805 5071
11343788 5072 kid = cLISTOPo->op_first;
8990e307 5073 if (kid->op_type != OP_NULL)
463ee0b2 5074 croak("panic: ck_split");
8990e307 5075 kid = kid->op_sibling;
11343788
MB		 5076 op_free(cLISTOPo->op_first);
5077 cLISTOPo->op_first = kid;
85e6fe83 5078 if (!kid) {
11343788
MB		 5079 cLISTOPo->op_first = kid = newSVOP(OP_CONST, 0, newSVpv(" ", 1));
5080 cLISTOPo->op_last = kid; /* There was only one element previously */
85e6fe83 5081 }
79072805
LW		 5082
5083 if (kid->op_type != OP_MATCH) {
5084 OP *sibl = kid->op_sibling;
463ee0b2 5085 kid->op_sibling = 0;
79072805 5086 kid = pmruntime( newPMOP(OP_MATCH, OPf_SPECIAL), kid, Nullop);
11343788
MB		 5087 if (cLISTOPo->op_first == cLISTOPo->op_last)
5088 cLISTOPo->op_last = kid;
5089 cLISTOPo->op_first = kid;
79072805
LW		 5090 kid->op_sibling = sibl;
5091 }
5092
5093 kid->op_type = OP_PUSHRE;
22c35a8c 5094 kid->op_ppaddr = PL_ppaddr[OP_PUSHRE];
79072805
LW		 5095 scalar(kid);
5096
5097 if (!kid->op_sibling)
54b9620d 5098 append_elem(OP_SPLIT, o, newDEFSVOP());
79072805
LW		 5099
5100 kid = kid->op_sibling;
5101 scalar(kid);
5102
5103 if (!kid->op_sibling)
11343788 5104 append_elem(OP_SPLIT, o, newSVOP(OP_CONST, 0, newSViv(0)));
79072805
LW		 5105
5106 kid = kid->op_sibling;
5107 scalar(kid);
5108
5109 if (kid->op_sibling)
22c35a8c 5110 return too_many_arguments(o,PL_op_desc[o->op_type]);
79072805 5111
11343788 5112 return o;
79072805
LW		 5113}
5114
5115OP *
8ac85365 5116ck_subr(OP *o)
79072805 5117{
11343788
MB		 5118 dTHR;
5119 OP *prev = ((cUNOPo->op_first->op_sibling)
5120 ? cUNOPo : ((UNOP*)cUNOPo->op_first))->op_first;
5121 OP *o2 = prev->op_sibling;
4633a7c4
LW		 5122 OP *cvop;
5123 char *proto = 0;
5124 CV *cv = 0;
46fc3d4c 5125 GV *namegv = 0;
4633a7c4
LW		 5126 int optional = 0;
5127 I32 arg = 0;
5128
11343788 5129 for (cvop = o2; cvop->op_sibling; cvop = cvop->op_sibling) ;
4633a7c4
LW		 5130 if (cvop->op_type == OP_RV2CV) {
5131 SVOP* tmpop;
11343788 5132 o->op_private |= (cvop->op_private & OPpENTERSUB_AMPER);
4633a7c4
LW		 5133 null(cvop); /* disable rv2cv */
5134 tmpop = (SVOP*)((UNOP*)cvop)->op_first;
5135 if (tmpop->op_type == OP_GV) {
8ebc5c01 5136 cv = GvCVu(tmpop->op_sv);
5dc0d613 5137 if (cv && SvPOK(cv) && !(o->op_private & OPpENTERSUB_AMPER)) {
46fc3d4c 5138 namegv = CvANON(cv) ? (GV*)tmpop->op_sv : CvGV(cv);
3280af22 5139 proto = SvPV((SV*)cv, PL_na);
46fc3d4c 5140 }
4633a7c4
LW		 5141 }
5142 }
3280af22
NIS		 5143 o->op_private |= (PL_hints & HINT_STRICT_REFS);
5144 if (PERLDB_SUB && PL_curstash != PL_debstash)
11343788
MB		 5145 o->op_private |= OPpENTERSUB_DB;
5146 while (o2 != cvop) {
4633a7c4
LW		 5147 if (proto) {
5148 switch (*proto) {
5149 case '\0':
5dc0d613 5150 return too_many_arguments(o, gv_ename(namegv));
4633a7c4
LW		 5151 case ';':
5152 optional = 1;
5153 proto++;
5154 continue;
5155 case '$':
5156 proto++;
5157 arg++;
11343788 5158 scalar(o2);
4633a7c4
LW		 5159 break;
5160 case '%':
5161 case '@':
11343788 5162 list(o2);
4633a7c4
LW		 5163 arg++;
5164 break;
5165 case '&':
5166 proto++;
5167 arg++;
11343788 5168 if (o2->op_type != OP_REFGEN && o2->op_type != OP_UNDEF)
5dc0d613 5169 bad_type(arg, "block", gv_ename(namegv), o2);
4633a7c4
LW		 5170 break;
5171 case '*':
5172 proto++;
5173 arg++;
11343788 5174 if (o2->op_type == OP_RV2GV)
4633a7c4
LW		 5175 goto wrapref;
5176 {
11343788 5177 OP* kid = o2;
69dcf70c 5178 OP* sib = kid->op_sibling;
4633a7c4 5179 kid->op_sibling = 0;
69dcf70c
MB		 5180 o2 = newUNOP(OP_RV2GV, 0, kid);
5181 o2->op_sibling = sib;
6fa846a0 5182 prev->op_sibling = o2;
4633a7c4
LW		 5183 }
5184 goto wrapref;
5185 case '\\':
5186 proto++;
5187 arg++;
5188 switch (*proto++) {
5189 case '*':
11343788 5190 if (o2->op_type != OP_RV2GV)
5dc0d613 5191 bad_type(arg, "symbol", gv_ename(namegv), o2);
4633a7c4
LW		 5192 goto wrapref;
5193 case '&':
11343788 5194 if (o2->op_type != OP_RV2CV)
5dc0d613 5195 bad_type(arg, "sub", gv_ename(namegv), o2);
4633a7c4
LW		 5196 goto wrapref;
5197 case '$':
386acf99
GS		 5198 if (o2->op_type != OP_RV2SV
5199 && o2->op_type != OP_PADSV
5200 && o2->op_type != OP_THREADSV)
5201 {
5dc0d613 5202 bad_type(arg, "scalar", gv_ename(namegv), o2);
386acf99 5203 }
4633a7c4
LW		 5204 goto wrapref;
5205 case '@':
11343788 5206 if (o2->op_type != OP_RV2AV && o2->op_type != OP_PADAV)
5dc0d613 5207 bad_type(arg, "array", gv_ename(namegv), o2);
4633a7c4
LW		 5208 goto wrapref;
5209 case '%':
11343788 5210 if (o2->op_type != OP_RV2HV && o2->op_type != OP_PADHV)
5dc0d613 5211 bad_type(arg, "hash", gv_ename(namegv), o2);
4633a7c4
LW		 5212 wrapref:
5213 {
11343788 5214 OP* kid = o2;
6fa846a0 5215 OP* sib = kid->op_sibling;
4633a7c4 5216 kid->op_sibling = 0;
6fa846a0
GS		 5217 o2 = newUNOP(OP_REFGEN, 0, kid);
5218 o2->op_sibling = sib;
e858de61 5219 prev->op_sibling = o2;
4633a7c4
LW		 5220 }
5221 break;
5222 default: goto oops;
5223 }
5224 break;
b1cb66bf 5225 case ' ':
5226 proto++;
5227 continue;
4633a7c4
LW		 5228 default:
5229 oops:
5230 croak("Malformed prototype for %s: %s",
3280af22 5231 gv_ename(namegv), SvPV((SV*)cv, PL_na));
4633a7c4
LW		 5232 }
5233 }
5234 else
11343788
MB		 5235 list(o2);
5236 mod(o2, OP_ENTERSUB);
5237 prev = o2;
5238 o2 = o2->op_sibling;
4633a7c4 5239 }
fb73857a 5240 if (proto && !optional &&
5241 (*proto && *proto != '@' && *proto != '%' && *proto != ';'))
5dc0d613 5242 return too_few_arguments(o, gv_ename(namegv));
11343788 5243 return o;
79072805
LW		 5244}
5245
5246OP *
8ac85365 5247ck_svconst(OP *o)
8990e307 5248{
11343788
MB		 5249 SvREADONLY_on(cSVOPo->op_sv);
5250 return o;
8990e307
LW		 5251}
5252
5253OP *
8ac85365 5254ck_trunc(OP *o)
79072805 5255{
11343788
MB		 5256 if (o->op_flags & OPf_KIDS) {
5257 SVOP *kid = (SVOP*)cUNOPo->op_first;
79072805 5258
a0d0e21e
LW		 5259 if (kid->op_type == OP_NULL)
5260 kid = (SVOP*)kid->op_sibling;
5261 if (kid &&
5262 kid->op_type == OP_CONST && (kid->op_private & OPpCONST_BARE))
11343788 5263 o->op_flags |= OPf_SPECIAL;
79072805 5264 }
11343788 5265 return ck_fun(o);
79072805
LW		 5266}
5267
463ee0b2
LW		 5268/* A peephole optimizer. We visit the ops in the order they're to execute. */
5269
79072805 5270void
8ac85365 5271peep(register OP *o)
79072805 5272{
11343788 5273 dTHR;
79072805 5274 register OP* oldop = 0;
a0d0e21e 5275 if (!o || o->op_seq)
79072805 5276 return;
a0d0e21e 5277 ENTER;
462e5cf6 5278 SAVEOP();
3280af22 5279 SAVESPTR(PL_curcop);
a0d0e21e
LW		 5280 for (; o; o = o->op_next) {
5281 if (o->op_seq)
5282 break;
3280af22
NIS		 5283 if (!PL_op_seqmax)
5284 PL_op_seqmax++;
533c011a 5285 PL_op = o;
a0d0e21e
LW		 5286 switch (o->op_type) {
5287 case OP_NEXTSTATE:
5288 case OP_DBSTATE:
3280af22
NIS		 5289 PL_curcop = ((COP*)o); /* for warnings */
5290 o->op_seq = PL_op_seqmax++;
a0d0e21e
LW		 5291 break;
5292
5293 case OP_CONCAT:
5294 case OP_CONST:
5295 case OP_JOIN:
5296 case OP_UC:
5297 case OP_UCFIRST:
5298 case OP_LC:
5299 case OP_LCFIRST:
5300 case OP_QUOTEMETA:
3c4f770c 5301 if (o->op_next && o->op_next->op_type == OP_STRINGIFY)
a0d0e21e 5302 null(o->op_next);
3280af22 5303 o->op_seq = PL_op_seqmax++;
a0d0e21e 5304 break;
8990e307 5305 case OP_STUB:
54310121 5306 if ((o->op_flags & OPf_WANT) != OPf_WANT_LIST) {
3280af22 5307 o->op_seq = PL_op_seqmax++;
54310121 5308 break; /* Scalar stub must produce undef. List stub is noop */
8990e307 5309 }
748a9306 5310 goto nothin;
79072805 5311 case OP_NULL:
748a9306 5312 if (o->op_targ == OP_NEXTSTATE || o->op_targ == OP_DBSTATE)
3280af22 5313 PL_curcop = ((COP*)o);
748a9306 5314 goto nothin;
79072805 5315 case OP_SCALAR:
93a17b20 5316 case OP_LINESEQ:
463ee0b2 5317 case OP_SCOPE:
748a9306 5318 nothin:
a0d0e21e
LW		 5319 if (oldop && o->op_next) {
5320 oldop->op_next = o->op_next;
79072805
LW		 5321 continue;
5322 }
3280af22 5323 o->op_seq = PL_op_seqmax++;
79072805
LW		 5324 break;
5325
5326 case OP_GV:
a0d0e21e 5327 if (o->op_next->op_type == OP_RV2SV) {
5f05dabc 5328 if (!(o->op_next->op_private & OPpDEREF)) {
a0d0e21e
LW		 5329 null(o->op_next);
5330 o->op_private |= o->op_next->op_private & OPpLVAL_INTRO;
5331 o->op_next = o->op_next->op_next;
5332 o->op_type = OP_GVSV;
22c35a8c 5333 o->op_ppaddr = PL_ppaddr[OP_GVSV];
8990e307
LW		 5334 }
5335 }
a0d0e21e
LW		 5336 else if (o->op_next->op_type == OP_RV2AV) {
5337 OP* pop = o->op_next->op_next;
5338 IV i;
8990e307 5339 if (pop->op_type == OP_CONST &&
533c011a 5340 (PL_op = pop->op_next) &&
8990e307 5341 pop->op_next->op_type == OP_AELEM &&
a0d0e21e 5342 !(pop->op_next->op_private &
68dc0745 5343 (OPpLVAL_INTRO|OPpLVAL_DEFER|OPpDEREF)) &&
3280af22 5344 (i = SvIV(((SVOP*)pop)->op_sv) - PL_compiling.cop_arybase)
a0d0e21e 5345 <= 255 &&
8990e307
LW		 5346 i >= 0)
5347 {
748a9306 5348 SvREFCNT_dec(((SVOP*)pop)->op_sv);
a0d0e21e 5349 null(o->op_next);
8990e307
LW		 5350 null(pop->op_next);
5351 null(pop);
a0d0e21e
LW		 5352 o->op_flags |= pop->op_next->op_flags & OPf_MOD;
5353 o->op_next = pop->op_next->op_next;
5354 o->op_type = OP_AELEMFAST;
22c35a8c 5355 o->op_ppaddr = PL_ppaddr[OP_AELEMFAST];
a0d0e21e 5356 o->op_private = (U8)i;
a6006777 5357 GvAVn(((GVOP*)o)->op_gv);
8990e307 5358 }
79072805 5359 }
3280af22 5360 o->op_seq = PL_op_seqmax++;
79072805
LW		 5361 break;
5362
a0d0e21e 5363 case OP_MAPWHILE:
79072805
LW		 5364 case OP_GREPWHILE:
5365 case OP_AND:
5366 case OP_OR:
3280af22 5367 o->op_seq = PL_op_seqmax++;
fd4d1407
IZ		 5368 while (cLOGOP->op_other->op_type == OP_NULL)
5369 cLOGOP->op_other = cLOGOP->op_other->op_next;
79072805
LW		 5370 peep(cLOGOP->op_other);
5371 break;
5372
5373 case OP_COND_EXPR:
3280af22 5374 o->op_seq = PL_op_seqmax++;
79072805
LW		 5375 peep(cCONDOP->op_true);
5376 peep(cCONDOP->op_false);
5377 break;
5378
5379 case OP_ENTERLOOP:
3280af22 5380 o->op_seq = PL_op_seqmax++;
79072805
LW		 5381 peep(cLOOP->op_redoop);
5382 peep(cLOOP->op_nextop);
5383 peep(cLOOP->op_lastop);
5384 break;
5385
8782bef2 5386 case OP_QR:
79072805
LW		 5387 case OP_MATCH:
5388 case OP_SUBST:
3280af22 5389 o->op_seq = PL_op_seqmax++;
a0d0e21e 5390 peep(cPMOP->op_pmreplstart);
79072805
LW		 5391 break;
5392
a0d0e21e 5393 case OP_EXEC:
3280af22 5394 o->op_seq = PL_op_seqmax++;
599cee73
PM		 5395 if (ckWARN(WARN_SYNTAX) && o->op_next
5396 && o->op_next->op_type == OP_NEXTSTATE) {
a0d0e21e 5397 if (o->op_next->op_sibling &&
20408e3c
GS		 5398 o->op_next->op_sibling->op_type != OP_EXIT &&
5399 o->op_next->op_sibling->op_type != OP_WARN &&
a0d0e21e 5400 o->op_next->op_sibling->op_type != OP_DIE) {
3280af22 5401 line_t oldline = PL_curcop->cop_line;
a0d0e21e 5402
3280af22 5403 PL_curcop->cop_line = ((COP*)o->op_next)->cop_line;
599cee73
PM		 5404 warner(WARN_SYNTAX, "Statement unlikely to be reached");
5405 warner(WARN_SYNTAX, "(Maybe you meant system() when you said exec()?)\n");
3280af22 5406 PL_curcop->cop_line = oldline;
a0d0e21e
LW		 5407 }
5408 }
5409 break;
aeea060c 5410
c750a3ec
MB		 5411 case OP_HELEM: {
5412 UNOP *rop;
5413 SV *lexname;
5414 GV **fields;
5415 SV **svp, **indsvp;
5416 I32 ind;
5417 char *key;
5418 STRLEN keylen;
aeea060c 5419
c750a3ec
MB		 5420 if (o->op_private & (OPpDEREF_HV|OPpDEREF_AV|OPpLVAL_INTRO)
5421 || ((BINOP*)o)->op_last->op_type != OP_CONST)
5422 break;
5423 rop = (UNOP*)((BINOP*)o)->op_first;
5424 if (rop->op_type != OP_RV2HV || rop->op_first->op_type != OP_PADSV)
5425 break;
3280af22 5426 lexname = *av_fetch(PL_comppad_name, rop->op_first->op_targ, TRUE);
c750a3ec
MB		 5427 if (!SvOBJECT(lexname))
5428 break;
5196be3e 5429 fields = (GV**)hv_fetch(SvSTASH(lexname), "FIELDS", 6, FALSE);
c750a3ec
MB		 5430 if (!fields || !GvHV(*fields))
5431 break;
5432 svp = &((SVOP*)((BINOP*)o)->op_last)->op_sv;
5433 key = SvPV(*svp, keylen);
5434 indsvp = hv_fetch(GvHV(*fields), key, keylen, FALSE);
5435 if (!indsvp) {
5436 croak("No such field \"%s\" in variable %s of type %s",
3280af22 5437 key, SvPV(lexname, PL_na), HvNAME(SvSTASH(lexname)));
c750a3ec
MB		 5438 }
5439 ind = SvIV(*indsvp);
5440 if (ind < 1)
5441 croak("Bad index while coercing array into hash");
5442 rop->op_type = OP_RV2AV;
22c35a8c 5443 rop->op_ppaddr = PL_ppaddr[OP_RV2AV];
c750a3ec 5444 o->op_type = OP_AELEM;
22c35a8c 5445 o->op_ppaddr = PL_ppaddr[OP_AELEM];
c750a3ec
MB		 5446 SvREFCNT_dec(*svp);
5447 *svp = newSViv(ind);
5448 break;
5449 }
5450
79072805 5451 default:
3280af22 5452 o->op_seq = PL_op_seqmax++;
79072805
LW		 5453 break;
5454 }
a0d0e21e 5455 oldop = o;
79072805 5456 }
a0d0e21e 5457 LEAVE;
79072805 5458}
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