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The last parameter to gv_stashpv/gv_stashpvn/gv_stashsv is a bitmask
[perl5.git] / gv.c
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a0d0e21e 1/* gv.c
79072805 2 *
4bb101f2 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
fdf8c088 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others
79072805
LW
5 *
6 * You may distribute under the terms of either the GNU General Public
7 * License or the Artistic License, as specified in the README file.
8 *
a0d0e21e
LW
9 */
10
11/*
12 * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure
13 * of your inquisitiveness, I shall spend all the rest of my days answering
14 * you. What more do you want to know?'
15 * 'The names of all the stars, and of all living things, and the whole
16 * history of Middle-earth and Over-heaven and of the Sundering Seas,'
17 * laughed Pippin.
79072805
LW
18 */
19
ccfc67b7
JH
20/*
21=head1 GV Functions
166f8a29
DM
22
23A GV is a structure which corresponds to to a Perl typeglob, ie *foo.
24It is a structure that holds a pointer to a scalar, an array, a hash etc,
25corresponding to $foo, @foo, %foo.
26
27GVs are usually found as values in stashes (symbol table hashes) where
28Perl stores its global variables.
29
30=cut
ccfc67b7
JH
31*/
32
79072805 33#include "EXTERN.h"
864dbfa3 34#define PERL_IN_GV_C
79072805
LW
35#include "perl.h"
36
f54cb97a
AL
37static const char S_autoload[] = "AUTOLOAD";
38static const STRLEN S_autolen = sizeof(S_autoload)-1;
5c7983e5 39
c69033f2
NC
40
41#ifdef PERL_DONT_CREATE_GVSV
42GV *
43Perl_gv_SVadd(pTHX_ GV *gv)
44{
45 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
46 Perl_croak(aTHX_ "Bad symbol for scalar");
47 if (!GvSV(gv))
561b68a9 48 GvSV(gv) = newSV(0);
c69033f2
NC
49 return gv;
50}
51#endif
52
79072805 53GV *
864dbfa3 54Perl_gv_AVadd(pTHX_ register GV *gv)
79072805 55{
a0d0e21e 56 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
cea2e8a9 57 Perl_croak(aTHX_ "Bad symbol for array");
79072805
LW
58 if (!GvAV(gv))
59 GvAV(gv) = newAV();
60 return gv;
61}
62
63GV *
864dbfa3 64Perl_gv_HVadd(pTHX_ register GV *gv)
79072805 65{
a0d0e21e 66 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
cea2e8a9 67 Perl_croak(aTHX_ "Bad symbol for hash");
79072805 68 if (!GvHV(gv))
463ee0b2 69 GvHV(gv) = newHV();
79072805
LW
70 return gv;
71}
72
73GV *
864dbfa3 74Perl_gv_IOadd(pTHX_ register GV *gv)
a0d0e21e 75{
97aff369 76 dVAR;
8b5be85c
SP
77 if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) {
78
79 /*
80 * if it walks like a dirhandle, then let's assume that
81 * this is a dirhandle.
82 */
b37c2d43 83 const char * const fh =
666ea192
JH
84 PL_op->op_type == OP_READDIR ||
85 PL_op->op_type == OP_TELLDIR ||
86 PL_op->op_type == OP_SEEKDIR ||
87 PL_op->op_type == OP_REWINDDIR ||
88 PL_op->op_type == OP_CLOSEDIR ?
89 "dirhandle" : "filehandle";
8b5be85c
SP
90 Perl_croak(aTHX_ "Bad symbol for %s", fh);
91 }
92
5bd07a3d 93 if (!GvIOp(gv)) {
7fb37951
AMS
94#ifdef GV_UNIQUE_CHECK
95 if (GvUNIQUE(gv)) {
96 Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)");
5bd07a3d
DM
97 }
98#endif
a0d0e21e 99 GvIOp(gv) = newIO();
5bd07a3d 100 }
a0d0e21e
LW
101 return gv;
102}
103
104GV *
864dbfa3 105Perl_gv_fetchfile(pTHX_ const char *name)
79072805 106{
97aff369 107 dVAR;
eacec437 108 char smallbuf[256];
53d95988 109 char *tmpbuf;
8ebc5c01 110 STRLEN tmplen;
79072805
LW
111 GV *gv;
112
1d7c1841 113 if (!PL_defstash)
a0714e2c 114 return NULL;
1d7c1841 115
53d95988
CS
116 tmplen = strlen(name) + 2;
117 if (tmplen < sizeof smallbuf)
118 tmpbuf = smallbuf;
119 else
a02a5408 120 Newx(tmpbuf, tmplen + 1, char);
0ac0412a 121 /* This is where the debugger's %{"::_<$filename"} hash is created */
53d95988
CS
122 tmpbuf[0] = '_';
123 tmpbuf[1] = '<';
490a0e98 124 memcpy(tmpbuf + 2, name, tmplen - 1);
3280af22 125 gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
1d7c1841 126 if (!isGV(gv)) {
3280af22 127 gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
c69033f2
NC
128#ifdef PERL_DONT_CREATE_GVSV
129 GvSV(gv) = newSVpvn(name, tmplen - 2);
130#else
131 sv_setpvn(GvSV(gv), name, tmplen - 2);
132#endif
1d7c1841 133 if (PERLDB_LINE)
a0714e2c 134 hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile);
1d7c1841 135 }
53d95988
CS
136 if (tmpbuf != smallbuf)
137 Safefree(tmpbuf);
79072805
LW
138 return gv;
139}
140
62d55b22
NC
141/*
142=for apidoc gv_const_sv
143
144If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for
145inlining, or C<gv> is a placeholder reference that would be promoted to such
146a typeglob, then returns the value returned by the sub. Otherwise, returns
147NULL.
148
149=cut
150*/
151
152SV *
153Perl_gv_const_sv(pTHX_ GV *gv)
154{
155 if (SvTYPE(gv) == SVt_PVGV)
156 return cv_const_sv(GvCVu(gv));
157 return SvROK(gv) ? SvRV(gv) : NULL;
158}
159
12816592
NC
160GP *
161Perl_newGP(pTHX_ GV *const gv)
162{
163 GP *gp;
1df5f7c1
NC
164 const char *const file
165 = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : "";
f4890806
NC
166 STRLEN len = strlen(file);
167 U32 hash;
168
169 PERL_HASH(hash, file, len);
170
12816592
NC
171 Newxz(gp, 1, GP);
172
173#ifndef PERL_DONT_CREATE_GVSV
b5c2dcb8 174 gp->gp_sv = newSV(0);
12816592
NC
175#endif
176
1df5f7c1 177 gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0;
12816592
NC
178 /* XXX Ideally this cast would be replaced with a change to const char*
179 in the struct. */
f4890806 180 gp->gp_file_hek = share_hek(file, len, hash);
12816592
NC
181 gp->gp_egv = gv;
182 gp->gp_refcnt = 1;
183
184 return gp;
185}
186
463ee0b2 187void
864dbfa3 188Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi)
463ee0b2 189{
27da23d5 190 dVAR;
3b6733bf
NC
191 const U32 old_type = SvTYPE(gv);
192 const bool doproto = old_type > SVt_NULL;
b15aece3 193 const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL;
756cb477 194 SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL;
1ccdb730 195 const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0;
756cb477
NC
196
197 assert (!(proto && has_constant));
198
199 if (has_constant) {
5c1f4d79
NC
200 /* The constant has to be a simple scalar type. */
201 switch (SvTYPE(has_constant)) {
202 case SVt_PVAV:
203 case SVt_PVHV:
204 case SVt_PVCV:
205 case SVt_PVFM:
206 case SVt_PVIO:
207 Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob",
208 sv_reftype(has_constant, 0));
42d0e0b7 209 default: NOOP;
5c1f4d79 210 }
756cb477
NC
211 SvRV_set(gv, NULL);
212 SvROK_off(gv);
213 }
463ee0b2 214
3b6733bf
NC
215
216 if (old_type < SVt_PVGV) {
217 if (old_type >= SVt_PV)
218 SvCUR_set(gv, 0);
219 sv_upgrade((SV*)gv, SVt_PVGV);
220 }
55d729e4
GS
221 if (SvLEN(gv)) {
222 if (proto) {
f880fe2f 223 SvPV_set(gv, NULL);
b162af07 224 SvLEN_set(gv, 0);
55d729e4
GS
225 SvPOK_off(gv);
226 } else
94010e71 227 Safefree(SvPVX_mutable(gv));
55d729e4 228 }
2e5b91de
NC
229 SvIOK_off(gv);
230 isGV_with_GP_on(gv);
12816592
NC
231
232 GvGP(gv) = Perl_newGP(aTHX_ gv);
e15faf7d
NC
233 GvSTASH(gv) = stash;
234 if (stash)
235 Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv);
ae8cc45f 236 gv_name_set(gv, name, len, GV_ADD);
23ad5bf5 237 if (multi || doproto) /* doproto means it _was_ mentioned */
a5f75d66 238 GvMULTI_on(gv);
55d729e4
GS
239 if (doproto) { /* Replicate part of newSUB here. */
240 ENTER;
756cb477
NC
241 if (has_constant) {
242 /* newCONSTSUB takes ownership of the reference from us. */
243 GvCV(gv) = newCONSTSUB(stash, name, has_constant);
1ccdb730
NC
244 /* If this reference was a copy of another, then the subroutine
245 must have been "imported", by a Perl space assignment to a GV
246 from a reference to CV. */
247 if (exported_constant)
248 GvIMPORTED_CV_on(gv);
756cb477
NC
249 } else {
250 /* XXX unsafe for threads if eval_owner isn't held */
251 (void) start_subparse(0,0); /* Create empty CV in compcv. */
252 GvCV(gv) = PL_compcv;
253 }
55d729e4
GS
254 LEAVE;
255
3280af22 256 PL_sub_generation++;
65c50114 257 CvGV(GvCV(gv)) = gv;
e0d088d0 258 CvFILE_set_from_cop(GvCV(gv), PL_curcop);
3280af22 259 CvSTASH(GvCV(gv)) = PL_curstash;
55d729e4
GS
260 if (proto) {
261 sv_setpv((SV*)GvCV(gv), proto);
262 Safefree(proto);
263 }
264 }
463ee0b2
LW
265}
266
76e3520e 267STATIC void
cea2e8a9 268S_gv_init_sv(pTHX_ GV *gv, I32 sv_type)
a0d0e21e
LW
269{
270 switch (sv_type) {
271 case SVt_PVIO:
272 (void)GvIOn(gv);
273 break;
274 case SVt_PVAV:
275 (void)GvAVn(gv);
276 break;
277 case SVt_PVHV:
278 (void)GvHVn(gv);
279 break;
c69033f2
NC
280#ifdef PERL_DONT_CREATE_GVSV
281 case SVt_NULL:
282 case SVt_PVCV:
283 case SVt_PVFM:
e654831b 284 case SVt_PVGV:
c69033f2
NC
285 break;
286 default:
287 (void)GvSVn(gv);
288#endif
a0d0e21e
LW
289 }
290}
291
954c1994
GS
292/*
293=for apidoc gv_fetchmeth
294
295Returns the glob with the given C<name> and a defined subroutine or
296C<NULL>. The glob lives in the given C<stash>, or in the stashes
07766739 297accessible via @ISA and UNIVERSAL::.
954c1994
GS
298
299The argument C<level> should be either 0 or -1. If C<level==0>, as a
300side-effect creates a glob with the given C<name> in the given C<stash>
301which in the case of success contains an alias for the subroutine, and sets
b267980d 302up caching info for this glob. Similarly for all the searched stashes.
954c1994
GS
303
304This function grants C<"SUPER"> token as a postfix of the stash name. The
305GV returned from C<gv_fetchmeth> may be a method cache entry, which is not
4929bf7b 306visible to Perl code. So when calling C<call_sv>, you should not use
954c1994 307the GV directly; instead, you should use the method's CV, which can be
b267980d 308obtained from the GV with the C<GvCV> macro.
954c1994
GS
309
310=cut
311*/
312
79072805 313GV *
864dbfa3 314Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
79072805 315{
97aff369 316 dVAR;
79072805 317 AV* av;
463ee0b2 318 GV* topgv;
79072805 319 GV* gv;
463ee0b2 320 GV** gvp;
748a9306 321 CV* cv;
bfcb3514 322 const char *hvname;
10edeb5d 323 HV* lastchance = NULL;
a0d0e21e 324
af09ea45
IK
325 /* UNIVERSAL methods should be callable without a stash */
326 if (!stash) {
327 level = -1; /* probably appropriate */
da51bb9b 328 if(!(stash = gv_stashpvs("UNIVERSAL", 0)))
af09ea45
IK
329 return 0;
330 }
331
bfcb3514
NC
332 hvname = HvNAME_get(stash);
333 if (!hvname)
e27ad1f2
AV
334 Perl_croak(aTHX_
335 "Can't use anonymous symbol table for method lookup");
336
44a8e56a 337 if ((level > 100) || (level < -100))
cea2e8a9 338 Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'",
bfcb3514 339 name, hvname);
463ee0b2 340
bfcb3514 341 DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) );
44a8e56a
PP
342
343 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
344 if (!gvp)
a0714e2c 345 topgv = NULL;
44a8e56a
PP
346 else {
347 topgv = *gvp;
348 if (SvTYPE(topgv) != SVt_PVGV)
349 gv_init(topgv, stash, name, len, TRUE);
155aba94 350 if ((cv = GvCV(topgv))) {
44a8e56a 351 /* If genuine method or valid cache entry, use it */
3280af22 352 if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation)
7a4c00b4 353 return topgv;
44a8e56a
PP
354 /* Stale cached entry: junk it */
355 SvREFCNT_dec(cv);
601f1833 356 GvCV(topgv) = cv = NULL;
44a8e56a 357 GvCVGEN(topgv) = 0;
748a9306 358 }
3280af22 359 else if (GvCVGEN(topgv) == PL_sub_generation)
005a453c 360 return 0; /* cache indicates sub doesn't exist */
463ee0b2 361 }
79072805 362
017a3ce5 363 gvp = (GV**)hv_fetchs(stash, "ISA", FALSE);
7d49f689 364 av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : NULL;
9607fc9c 365
fb73857a
PP
366 /* create and re-create @.*::SUPER::ISA on demand */
367 if (!av || !SvMAGIC(av)) {
7423f6db 368 STRLEN packlen = HvNAMELEN_get(stash);
9607fc9c 369
bfcb3514 370 if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) {
9607fc9c
PP
371 HV* basestash;
372
373 packlen -= 7;
da51bb9b 374 basestash = gv_stashpvn(hvname, packlen, GV_ADD);
017a3ce5 375 gvp = (GV**)hv_fetchs(basestash, "ISA", FALSE);
3280af22 376 if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
017a3ce5 377 gvp = (GV**)hv_fetchs(stash, "ISA", TRUE);
9607fc9c 378 if (!gvp || !(gv = *gvp))
bfcb3514 379 Perl_croak(aTHX_ "Cannot create %s::ISA", hvname);
9607fc9c
PP
380 if (SvTYPE(gv) != SVt_PVGV)
381 gv_init(gv, stash, "ISA", 3, TRUE);
382 SvREFCNT_dec(GvAV(gv));
b37c2d43 383 GvAV(gv) = (AV*)SvREFCNT_inc_simple(av);
9607fc9c
PP
384 }
385 }
386 }
387
388 if (av) {
79072805 389 SV** svp = AvARRAY(av);
93965878
NIS
390 /* NOTE: No support for tied ISA */
391 I32 items = AvFILLp(av) + 1;
79072805 392 while (items--) {
823a54a3 393 SV* const sv = *svp++;
da51bb9b 394 HV* const basestash = gv_stashsv(sv, 0);
9bbf4081 395 if (!basestash) {
599cee73 396 if (ckWARN(WARN_MISC))
35c1215d 397 Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA",
be2597df 398 SVfARG(sv), hvname);
79072805
LW
399 continue;
400 }
44a8e56a
PP
401 gv = gv_fetchmeth(basestash, name, len,
402 (level >= 0) ? level + 1 : level - 1);
403 if (gv)
404 goto gotcha;
79072805
LW
405 }
406 }
a0d0e21e 407
9607fc9c
PP
408 /* if at top level, try UNIVERSAL */
409
44a8e56a 410 if (level == 0 || level == -1) {
da51bb9b 411 lastchance = gv_stashpvs("UNIVERSAL", 0);
9607fc9c 412
823a54a3 413 if (lastchance) {
155aba94
GS
414 if ((gv = gv_fetchmeth(lastchance, name, len,
415 (level >= 0) ? level + 1 : level - 1)))
416 {
44a8e56a 417 gotcha:
dc848c6f
PP
418 /*
419 * Cache method in topgv if:
420 * 1. topgv has no synonyms (else inheritance crosses wires)
421 * 2. method isn't a stub (else AUTOLOAD fails spectacularly)
422 */
423 if (topgv &&
424 GvREFCNT(topgv) == 1 &&
425 (cv = GvCV(gv)) &&
426 (CvROOT(cv) || CvXSUB(cv)))
427 {
155aba94 428 if ((cv = GvCV(topgv)))
44a8e56a
PP
429 SvREFCNT_dec(cv);
430 GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
3280af22 431 GvCVGEN(topgv) = PL_sub_generation;
44a8e56a 432 }
a0d0e21e
LW
433 return gv;
434 }
005a453c
JP
435 else if (topgv && GvREFCNT(topgv) == 1) {
436 /* cache the fact that the method is not defined */
3280af22 437 GvCVGEN(topgv) = PL_sub_generation;
005a453c 438 }
a0d0e21e
LW
439 }
440 }
441
79072805
LW
442 return 0;
443}
444
954c1994 445/*
611c1e95
IZ
446=for apidoc gv_fetchmeth_autoload
447
448Same as gv_fetchmeth(), but looks for autoloaded subroutines too.
449Returns a glob for the subroutine.
450
451For an autoloaded subroutine without a GV, will create a GV even
452if C<level < 0>. For an autoloaded subroutine without a stub, GvCV()
453of the result may be zero.
454
455=cut
456*/
457
458GV *
459Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level)
460{
461 GV *gv = gv_fetchmeth(stash, name, len, level);
462
463 if (!gv) {
611c1e95
IZ
464 CV *cv;
465 GV **gvp;
466
467 if (!stash)
6136c704 468 return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */
5c7983e5 469 if (len == S_autolen && strnEQ(name, S_autoload, S_autolen))
6136c704 470 return NULL;
5c7983e5 471 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
6136c704 472 return NULL;
611c1e95
IZ
473 cv = GvCV(gv);
474 if (!(CvROOT(cv) || CvXSUB(cv)))
6136c704 475 return NULL;
611c1e95
IZ
476 /* Have an autoload */
477 if (level < 0) /* Cannot do without a stub */
478 gv_fetchmeth(stash, name, len, 0);
479 gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
480 if (!gvp)
6136c704 481 return NULL;
611c1e95
IZ
482 return *gvp;
483 }
484 return gv;
485}
486
487/*
954c1994
GS
488=for apidoc gv_fetchmethod_autoload
489
490Returns the glob which contains the subroutine to call to invoke the method
491on the C<stash>. In fact in the presence of autoloading this may be the
492glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is
b267980d 493already setup.
954c1994
GS
494
495The third parameter of C<gv_fetchmethod_autoload> determines whether
496AUTOLOAD lookup is performed if the given method is not present: non-zero
b267980d 497means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD.
954c1994 498Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload>
b267980d 499with a non-zero C<autoload> parameter.
954c1994
GS
500
501These functions grant C<"SUPER"> token as a prefix of the method name. Note
502that if you want to keep the returned glob for a long time, you need to
503check for it being "AUTOLOAD", since at the later time the call may load a
504different subroutine due to $AUTOLOAD changing its value. Use the glob
b267980d 505created via a side effect to do this.
954c1994
GS
506
507These functions have the same side-effects and as C<gv_fetchmeth> with
508C<level==0>. C<name> should be writable if contains C<':'> or C<'
509''>. The warning against passing the GV returned by C<gv_fetchmeth> to
b267980d 510C<call_sv> apply equally to these functions.
954c1994
GS
511
512=cut
513*/
514
dc848c6f 515GV *
864dbfa3 516Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload)
dc848c6f 517{
97aff369 518 dVAR;
08105a92 519 register const char *nend;
c445ea15 520 const char *nsplit = NULL;
a0d0e21e 521 GV* gv;
0dae17bd
GS
522 HV* ostash = stash;
523
524 if (stash && SvTYPE(stash) < SVt_PVHV)
5c284bb0 525 stash = NULL;
b267980d 526
463ee0b2 527 for (nend = name; *nend; nend++) {
9607fc9c 528 if (*nend == '\'')
a0d0e21e 529 nsplit = nend;
9607fc9c
PP
530 else if (*nend == ':' && *(nend + 1) == ':')
531 nsplit = ++nend;
a0d0e21e
LW
532 }
533 if (nsplit) {
9d4ba2ae 534 const char * const origname = name;
a0d0e21e 535 name = nsplit + 1;
a0d0e21e
LW
536 if (*nsplit == ':')
537 --nsplit;
9607fc9c
PP
538 if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) {
539 /* ->SUPER::method should really be looked up in original stash */
b37c2d43 540 SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER",
1d7c1841 541 CopSTASHPV(PL_curcop)));
af09ea45 542 /* __PACKAGE__::SUPER stash should be autovivified */
da51bb9b 543 stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), GV_ADD);
cea2e8a9 544 DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n",
bfcb3514 545 origname, HvNAME_get(stash), name) );
4633a7c4 546 }
e189a56d 547 else {
af09ea45 548 /* don't autovifify if ->NoSuchStash::method */
da51bb9b 549 stash = gv_stashpvn(origname, nsplit - origname, 0);
e189a56d
IK
550
551 /* however, explicit calls to Pkg::SUPER::method may
552 happen, and may require autovivification to work */
553 if (!stash && (nsplit - origname) >= 7 &&
554 strnEQ(nsplit - 7, "::SUPER", 7) &&
da51bb9b
NC
555 gv_stashpvn(origname, nsplit - origname - 7, 0))
556 stash = gv_stashpvn(origname, nsplit - origname, GV_ADD);
e189a56d 557 }
0dae17bd 558 ostash = stash;
4633a7c4
LW
559 }
560
9607fc9c 561 gv = gv_fetchmeth(stash, name, nend - name, 0);
a0d0e21e 562 if (!gv) {
2f6e0fe7 563 if (strEQ(name,"import") || strEQ(name,"unimport"))
3280af22 564 gv = (GV*)&PL_sv_yes;
dc848c6f 565 else if (autoload)
0dae17bd 566 gv = gv_autoload4(ostash, name, nend - name, TRUE);
463ee0b2 567 }
dc848c6f 568 else if (autoload) {
9d4ba2ae 569 CV* const cv = GvCV(gv);
09280a33
CS
570 if (!CvROOT(cv) && !CvXSUB(cv)) {
571 GV* stubgv;
572 GV* autogv;
573
574 if (CvANON(cv))
575 stubgv = gv;
576 else {
577 stubgv = CvGV(cv);
578 if (GvCV(stubgv) != cv) /* orphaned import */
579 stubgv = gv;
580 }
581 autogv = gv_autoload4(GvSTASH(stubgv),
582 GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
dc848c6f
PP
583 if (autogv)
584 gv = autogv;
585 }
586 }
44a8e56a
PP
587
588 return gv;
589}
590
591GV*
864dbfa3 592Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method)
44a8e56a 593{
27da23d5 594 dVAR;
44a8e56a
PP
595 GV* gv;
596 CV* cv;
597 HV* varstash;
598 GV* vargv;
599 SV* varsv;
e1ec3a88 600 const char *packname = "";
eae70eaa 601 STRLEN packname_len = 0;
44a8e56a 602
5c7983e5 603 if (len == S_autolen && strnEQ(name, S_autoload, S_autolen))
a0714e2c 604 return NULL;
0dae17bd
GS
605 if (stash) {
606 if (SvTYPE(stash) < SVt_PVHV) {
e62f0680 607 packname = SvPV_const((SV*)stash, packname_len);
5c284bb0 608 stash = NULL;
0dae17bd
GS
609 }
610 else {
bfcb3514 611 packname = HvNAME_get(stash);
7423f6db 612 packname_len = HvNAMELEN_get(stash);
0dae17bd
GS
613 }
614 }
5c7983e5 615 if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE)))
a0714e2c 616 return NULL;
dc848c6f
PP
617 cv = GvCV(gv);
618
adb5a9ae 619 if (!(CvROOT(cv) || CvXSUB(cv)))
a0714e2c 620 return NULL;
ed850460 621
dc848c6f
PP
622 /*
623 * Inheriting AUTOLOAD for non-methods works ... for now.
624 */
041457d9
DM
625 if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash)
626 && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)
627 )
12bcd1a6 628 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
dc848c6f 629 "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
0dae17bd 630 packname, (int)len, name);
44a8e56a 631
aed2304a 632 if (CvISXSUB(cv)) {
adb5a9ae
DM
633 /* rather than lookup/init $AUTOLOAD here
634 * only to have the XSUB do another lookup for $AUTOLOAD
635 * and split that value on the last '::',
636 * pass along the same data via some unused fields in the CV
637 */
638 CvSTASH(cv) = stash;
f880fe2f 639 SvPV_set(cv, (char *)name); /* cast to lose constness warning */
b162af07 640 SvCUR_set(cv, len);
adb5a9ae
DM
641 return gv;
642 }
adb5a9ae 643
44a8e56a
PP
644 /*
645 * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
646 * The subroutine's original name may not be "AUTOLOAD", so we don't
647 * use that, but for lack of anything better we will use the sub's
648 * original package to look up $AUTOLOAD.
649 */
650 varstash = GvSTASH(CvGV(cv));
5c7983e5 651 vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE);
3d35f11b
GS
652 ENTER;
653
c69033f2 654 if (!isGV(vargv)) {
5c7983e5 655 gv_init(vargv, varstash, S_autoload, S_autolen, FALSE);
c69033f2 656#ifdef PERL_DONT_CREATE_GVSV
561b68a9 657 GvSV(vargv) = newSV(0);
c69033f2
NC
658#endif
659 }
3d35f11b 660 LEAVE;
e203899d 661 varsv = GvSVn(vargv);
7423f6db 662 sv_setpvn(varsv, packname, packname_len);
396482e1 663 sv_catpvs(varsv, "::");
44a8e56a 664 sv_catpvn(varsv, name, len);
a0d0e21e
LW
665 return gv;
666}
667
44a2ac75
YO
668
669/* require_tie_mod() internal routine for requiring a module
670 * that implements the logic of automatical ties like %! and %-
671 *
672 * The "gv" parameter should be the glob.
673 * "varpv" holds the name of the var, used for error messages
674 * "namesv" holds the module name
675 * "methpv" holds the method name to test for to check that things
676 * are working reasonably close to as expected
677 * "flags" if flag & 1 then save the scalar before loading.
678 * For the protection of $! to work (it is set by this routine)
679 * the sv slot must already be magicalized.
d2c93421 680 */
44a2ac75
YO
681STATIC HV*
682S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags)
d2c93421 683{
27da23d5 684 dVAR;
da51bb9b 685 HV* stash = gv_stashsv(namesv, 0);
44a2ac75
YO
686
687 if (!stash || !(gv_fetchmethod(stash, methpv))) {
688 SV *module = newSVsv(namesv);
d2c93421
RH
689 dSP;
690 PUTBACK;
691 ENTER;
44a2ac75
YO
692 if ( flags & 1 )
693 save_scalar(gv);
694 Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL);
d2c93421
RH
695 LEAVE;
696 SPAGAIN;
da51bb9b 697 stash = gv_stashsv(namesv, 0);
44a2ac75
YO
698 if (!stash)
699 Perl_croak( aTHX_ "panic: Can't use %%%s because %"SVf" is not available",
5ea31154 700 varpv, SVfARG(module));
44a2ac75
YO
701 else if (!gv_fetchmethod(stash, methpv))
702 Perl_croak( aTHX_ "panic: Can't use %%%s because %"SVf" does not support method %s",
5ea31154 703 varpv, SVfARG(module), methpv);
d2c93421 704 }
44a2ac75 705 return stash;
d2c93421
RH
706}
707
954c1994
GS
708/*
709=for apidoc gv_stashpv
710
da51bb9b
NC
711Returns a pointer to the stash for a specified package. Uses C<strlen> to
712determine the length of C<name, then calls C<gv_stashpvn()>.
954c1994
GS
713
714=cut
715*/
716
a0d0e21e 717HV*
864dbfa3 718Perl_gv_stashpv(pTHX_ const char *name, I32 create)
a0d0e21e 719{
dc437b57
PP
720 return gv_stashpvn(name, strlen(name), create);
721}
722
bc96cb06
SH
723/*
724=for apidoc gv_stashpvn
725
da51bb9b
NC
726Returns a pointer to the stash for a specified package. The C<namelen>
727parameter indicates the length of the C<name>, in bytes. C<flags> is passed
728to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be
729created if it does not already exist. If the package does not exist and
730C<flags> is 0 (or any other setting that does not create packages) then NULL
731is returned.
732
bc96cb06
SH
733
734=cut
735*/
736
dc437b57 737HV*
da51bb9b 738Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags)
dc437b57 739{
0cea0058 740 char smallbuf[128];
46fc3d4c 741 char *tmpbuf;
a0d0e21e
LW
742 HV *stash;
743 GV *tmpgv;
dc437b57 744
46fc3d4c
PP
745 if (namelen + 3 < sizeof smallbuf)
746 tmpbuf = smallbuf;
747 else
a02a5408 748 Newx(tmpbuf, namelen + 3, char);
dc437b57
PP
749 Copy(name,tmpbuf,namelen,char);
750 tmpbuf[namelen++] = ':';
751 tmpbuf[namelen++] = ':';
752 tmpbuf[namelen] = '\0';
da51bb9b 753 tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, flags, SVt_PVHV);
46fc3d4c
PP
754 if (tmpbuf != smallbuf)
755 Safefree(tmpbuf);
a0d0e21e 756 if (!tmpgv)
da51bb9b 757 return NULL;
a0d0e21e
LW
758 if (!GvHV(tmpgv))
759 GvHV(tmpgv) = newHV();
760 stash = GvHV(tmpgv);
bfcb3514 761 if (!HvNAME_get(stash))
51a37f80 762 hv_name_set(stash, name, namelen, 0);
a0d0e21e 763 return stash;
463ee0b2
LW
764}
765
954c1994
GS
766/*
767=for apidoc gv_stashsv
768
da51bb9b 769Returns a pointer to the stash for a specified package. See C<gv_stashpvn>.
954c1994
GS
770
771=cut
772*/
773
a0d0e21e 774HV*
da51bb9b 775Perl_gv_stashsv(pTHX_ SV *sv, I32 flags)
a0d0e21e 776{
dc437b57 777 STRLEN len;
9d4ba2ae 778 const char * const ptr = SvPV_const(sv,len);
da51bb9b 779 return gv_stashpvn(ptr, len, flags);
a0d0e21e
LW
780}
781
782
463ee0b2 783GV *
7a5fd60d 784Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) {
b7787f18 785 return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type);
7a5fd60d
NC
786}
787
788GV *
789Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) {
790 STRLEN len;
9d4ba2ae 791 const char * const nambeg = SvPV_const(name, len);
7a5fd60d
NC
792 return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type);
793}
794
795GV *
796Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags,
797 I32 sv_type)
79072805 798{
97aff369 799 dVAR;
08105a92 800 register const char *name = nambeg;
c445ea15 801 register GV *gv = NULL;
79072805 802 GV**gvp;
79072805 803 I32 len;
b3d904f3 804 register const char *name_cursor;
c445ea15 805 HV *stash = NULL;
add2581e 806 const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT);
e26df76a 807 const I32 no_expand = flags & GV_NOEXPAND;
780a5241 808 const I32 add = flags & ~GV_NOADD_MASK;
b3d904f3
NC
809 const char *const name_end = nambeg + full_len;
810 const char *const name_em1 = name_end - 1;
79072805 811
fafc274c
NC
812 if (flags & GV_NOTQUAL) {
813 /* Caller promised that there is no stash, so we can skip the check. */
814 len = full_len;
815 goto no_stash;
816 }
817
b208e10c
NC
818 if (full_len > 2 && *name == '*' && isALPHA(name[1])) {
819 /* accidental stringify on a GV? */
c07a80fd 820 name++;
b208e10c 821 }
c07a80fd 822
b3d904f3
NC
823 for (name_cursor = name; name_cursor < name_end; name_cursor++) {
824 if ((*name_cursor == ':' && name_cursor < name_em1
825 && name_cursor[1] == ':')
826 || (*name_cursor == '\'' && name_cursor[1]))
463ee0b2 827 {
463ee0b2 828 if (!stash)
3280af22 829 stash = PL_defstash;
dc437b57 830 if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
a0714e2c 831 return NULL;
463ee0b2 832
b3d904f3 833 len = name_cursor - name;
85e6fe83 834 if (len > 0) {
0cea0058 835 char smallbuf[128];
62b57502 836 char *tmpbuf;
62b57502 837
bb7a0f54 838 if (len + 3 < (I32)sizeof (smallbuf))
3c78fafa 839 tmpbuf = smallbuf;
62b57502 840 else
a02a5408 841 Newx(tmpbuf, len+3, char);
a0d0e21e
LW
842 Copy(name, tmpbuf, len, char);
843 tmpbuf[len++] = ':';
844 tmpbuf[len++] = ':';
845 tmpbuf[len] = '\0';
463ee0b2 846 gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
a0714e2c 847 gv = gvp ? *gvp : NULL;
3280af22 848 if (gv && gv != (GV*)&PL_sv_undef) {
6fa846a0 849 if (SvTYPE(gv) != SVt_PVGV)
0f303493 850 gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI));
6fa846a0
GS
851 else
852 GvMULTI_on(gv);
853 }
3c78fafa 854 if (tmpbuf != smallbuf)
62b57502 855 Safefree(tmpbuf);
3280af22 856 if (!gv || gv == (GV*)&PL_sv_undef)
a0714e2c 857 return NULL;
85e6fe83 858
463ee0b2
LW
859 if (!(stash = GvHV(gv)))
860 stash = GvHV(gv) = newHV();
85e6fe83 861
bfcb3514 862 if (!HvNAME_get(stash))
b3d904f3 863 hv_name_set(stash, nambeg, name_cursor - nambeg, 0);
463ee0b2
LW
864 }
865
b3d904f3
NC
866 if (*name_cursor == ':')
867 name_cursor++;
868 name_cursor++;
869 name = name_cursor;
ad6bfa9d 870 if (name == name_end)
017a3ce5 871 return gv ? gv : (GV*)*hv_fetchs(PL_defstash, "main::", TRUE);
79072805 872 }
79072805 873 }
b3d904f3 874 len = name_cursor - name;
463ee0b2
LW
875
876 /* No stash in name, so see how we can default */
877
878 if (!stash) {
fafc274c 879 no_stash:
8ccce9ae 880 if (len && isIDFIRST_lazy(name)) {
9607fc9c
PP
881 bool global = FALSE;
882
8ccce9ae
NC
883 switch (len) {
884 case 1:
18ea00d7 885 if (*name == '_')
9d116dd7 886 global = TRUE;
18ea00d7 887 break;
8ccce9ae
NC
888 case 3:
889 if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C')
890 || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V')
891 || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G'))
9d116dd7 892 global = TRUE;
18ea00d7 893 break;
8ccce9ae
NC
894 case 4:
895 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
896 && name[3] == 'V')
9d116dd7 897 global = TRUE;
18ea00d7 898 break;
8ccce9ae
NC
899 case 5:
900 if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D'
901 && name[3] == 'I' && name[4] == 'N')
463ee0b2 902 global = TRUE;
18ea00d7 903 break;
8ccce9ae
NC
904 case 6:
905 if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D')
906 &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T')
907 ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R')))
908 global = TRUE;
909 break;
910 case 7:
911 if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G'
912 && name[3] == 'V' && name[4] == 'O' && name[5] == 'U'
913 && name[6] == 'T')
18ea00d7
NC
914 global = TRUE;
915 break;
463ee0b2 916 }
9607fc9c 917
463ee0b2 918 if (global)
3280af22 919 stash = PL_defstash;
923e4eb5 920 else if (IN_PERL_COMPILETIME) {
3280af22
NIS
921 stash = PL_curstash;
922 if (add && (PL_hints & HINT_STRICT_VARS) &&
748a9306
LW
923 sv_type != SVt_PVCV &&
924 sv_type != SVt_PVGV &&
4633a7c4 925 sv_type != SVt_PVFM &&
c07a80fd 926 sv_type != SVt_PVIO &&
70ec6265
NC
927 !(len == 1 && sv_type == SVt_PV &&
928 (*name == 'a' || *name == 'b')) )
748a9306 929 {
4633a7c4
LW
930 gvp = (GV**)hv_fetch(stash,name,len,0);
931 if (!gvp ||
3280af22 932 *gvp == (GV*)&PL_sv_undef ||
a5f75d66
AD
933 SvTYPE(*gvp) != SVt_PVGV)
934 {
d4c19fe8 935 stash = NULL;
a5f75d66 936 }
155aba94
GS
937 else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) ||
938 (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) ||
939 (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) )
4633a7c4 940 {
cea2e8a9 941 Perl_warn(aTHX_ "Variable \"%c%s\" is not imported",
4633a7c4
LW
942 sv_type == SVt_PVAV ? '@' :
943 sv_type == SVt_PVHV ? '%' : '$',
944 name);
8ebc5c01 945 if (GvCVu(*gvp))
cc507455 946 Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name);
d4c19fe8 947 stash = NULL;
4633a7c4 948 }
a0d0e21e 949 }
85e6fe83 950 }
463ee0b2 951 else
1d7c1841 952 stash = CopSTASH(PL_curcop);
463ee0b2
LW
953 }
954 else
3280af22 955 stash = PL_defstash;
463ee0b2
LW
956 }
957
958 /* By this point we should have a stash and a name */
959
a0d0e21e 960 if (!stash) {
5a844595 961 if (add) {
9d4ba2ae 962 SV * const err = Perl_mess(aTHX_
5a844595
GS
963 "Global symbol \"%s%s\" requires explicit package name",
964 (sv_type == SVt_PV ? "$"
965 : sv_type == SVt_PVAV ? "@"
966 : sv_type == SVt_PVHV ? "%"
608b3986 967 : ""), name);
e7f343b6 968 GV *gv;
608b3986
AE
969 if (USE_UTF8_IN_NAMES)
970 SvUTF8_on(err);
971 qerror(err);
e7f343b6
NC
972 gv = gv_fetchpvn_flags("<none>::", 8, GV_ADDMULTI, SVt_PVHV);
973 if(!gv) {
974 /* symbol table under destruction */
975 return NULL;
976 }
977 stash = GvHV(gv);
a0d0e21e 978 }
d7aacf4e 979 else
a0714e2c 980 return NULL;
a0d0e21e
LW
981 }
982
983 if (!SvREFCNT(stash)) /* symbol table under destruction */
a0714e2c 984 return NULL;
a0d0e21e 985
79072805 986 gvp = (GV**)hv_fetch(stash,name,len,add);
3280af22 987 if (!gvp || *gvp == (GV*)&PL_sv_undef)
a0714e2c 988 return NULL;
79072805
LW
989 gv = *gvp;
990 if (SvTYPE(gv) == SVt_PVGV) {
a0d0e21e 991 if (add) {
a5f75d66 992 GvMULTI_on(gv);
a0d0e21e 993 gv_init_sv(gv, sv_type);
44a2ac75
YO
994 if (sv_type == SVt_PVHV && len == 1 ) {
995 if (*name == '!')
996 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
997 else
998 if (*name == '-' || *name == '+')
999 require_tie_mod(gv, name, newSVpvs("re::Tie::Hash::NamedCapture"), "FETCH", 0);
1000
1001 }
a0d0e21e 1002 }
79072805 1003 return gv;
add2581e 1004 } else if (no_init) {
55d729e4 1005 return gv;
e26df76a
NC
1006 } else if (no_expand && SvROK(gv)) {
1007 return gv;
79072805 1008 }
93a17b20
LW
1009
1010 /* Adding a new symbol */
1011
0453d815 1012 if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL))
9014280d 1013 Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg);
55d729e4 1014 gv_init(gv, stash, name, len, add & GV_ADDMULTI);
a0d0e21e 1015 gv_init_sv(gv, sv_type);
93a17b20 1016
a0288114 1017 if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE)
7272584d 1018 : (PL_dowarn & G_WARN_ON ) ) )
0453d815
PM
1019 GvMULTI_on(gv) ;
1020
93a17b20 1021 /* set up magic where warranted */
cc4c2da6 1022 if (len > 1) {
9431620d 1023#ifndef EBCDIC
cc4c2da6 1024 if (*name > 'V' ) {
6f207bd3 1025 NOOP;
cc4c2da6 1026 /* Nothing else to do.
91f565cb 1027 The compiler will probably turn the switch statement into a
cc4c2da6
NC
1028 branch table. Make sure we avoid even that small overhead for
1029 the common case of lower case variable names. */
9431620d
NC
1030 } else
1031#endif
1032 {
b464bac0 1033 const char * const name2 = name + 1;
cc4c2da6
NC
1034 switch (*name) {
1035 case 'A':
1036 if (strEQ(name2, "RGV")) {
1037 IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
1038 }
7b8203e3
YST
1039 else if (strEQ(name2, "RGVOUT")) {
1040 GvMULTI_on(gv);
1041 }
cc4c2da6
NC
1042 break;
1043 case 'E':
1044 if (strnEQ(name2, "XPORT", 5))
1045 GvMULTI_on(gv);
1046 break;
1047 case 'I':
1048 if (strEQ(name2, "SA")) {
9d4ba2ae 1049 AV* const av = GvAVn(gv);
cc4c2da6 1050 GvMULTI_on(gv);
bd61b366 1051 sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, NULL, 0);
cc4c2da6
NC
1052 /* NOTE: No support for tied ISA */
1053 if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
1054 && AvFILLp(av) == -1)
1055 {
e1ec3a88 1056 const char *pname;
cc4c2da6 1057 av_push(av, newSVpvn(pname = "NDBM_File",9));
da51bb9b 1058 gv_stashpvn(pname, 9, GV_ADD);
cc4c2da6 1059 av_push(av, newSVpvn(pname = "DB_File",7));
da51bb9b 1060 gv_stashpvn(pname, 7, GV_ADD);
cc4c2da6 1061 av_push(av, newSVpvn(pname = "GDBM_File",9));
da51bb9b 1062 gv_stashpvn(pname, 9, GV_ADD);
cc4c2da6 1063 av_push(av, newSVpvn(pname = "SDBM_File",9));
da51bb9b 1064 gv_stashpvn(pname, 9, GV_ADD);
cc4c2da6 1065 av_push(av, newSVpvn(pname = "ODBM_File",9));
da51bb9b 1066 gv_stashpvn(pname, 9, GV_ADD);
cc4c2da6
NC
1067 }
1068 }
1069 break;
1070 case 'O':
1071 if (strEQ(name2, "VERLOAD")) {
9d4ba2ae 1072 HV* const hv = GvHVn(gv);
cc4c2da6 1073 GvMULTI_on(gv);
a0714e2c 1074 hv_magic(hv, NULL, PERL_MAGIC_overload);
cc4c2da6
NC
1075 }
1076 break;
1077 case 'S':
1078 if (strEQ(name2, "IG")) {
1079 HV *hv;
1080 I32 i;
1081 if (!PL_psig_ptr) {
a02a5408
JC
1082 Newxz(PL_psig_ptr, SIG_SIZE, SV*);
1083 Newxz(PL_psig_name, SIG_SIZE, SV*);
1084 Newxz(PL_psig_pend, SIG_SIZE, int);
cc4c2da6
NC
1085 }
1086 GvMULTI_on(gv);
1087 hv = GvHVn(gv);
a0714e2c 1088 hv_magic(hv, NULL, PERL_MAGIC_sig);
cc4c2da6 1089 for (i = 1; i < SIG_SIZE; i++) {
551405c4 1090 SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1);
cc4c2da6
NC
1091 if (init)
1092 sv_setsv(*init, &PL_sv_undef);
1093 PL_psig_ptr[i] = 0;
1094 PL_psig_name[i] = 0;
1095 PL_psig_pend[i] = 0;
1096 }
1097 }
1098 break;
1099 case 'V':
1100 if (strEQ(name2, "ERSION"))
1101 GvMULTI_on(gv);
1102 break;
e5218da5
GA
1103 case '\003': /* $^CHILD_ERROR_NATIVE */
1104 if (strEQ(name2, "HILD_ERROR_NATIVE"))
1105 goto magicalize;
1106 break;
cc4c2da6
NC
1107 case '\005': /* $^ENCODING */
1108 if (strEQ(name2, "NCODING"))
1109 goto magicalize;
1110 break;
cde0cee5
YO
1111 case '\015': /* $^MATCH */
1112 if (strEQ(name2, "ATCH"))
1113 goto ro_magicalize;
cc4c2da6
NC
1114 case '\017': /* $^OPEN */
1115 if (strEQ(name2, "PEN"))
1116 goto magicalize;
1117 break;
cde0cee5
YO
1118 case '\020': /* $^PREMATCH $^POSTMATCH */
1119 if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH"))
1120 goto ro_magicalize;
cc4c2da6
NC
1121 case '\024': /* ${^TAINT} */
1122 if (strEQ(name2, "AINT"))
1123 goto ro_magicalize;
1124 break;
7cebcbc0 1125 case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */
a0288114 1126 if (strEQ(name2, "NICODE"))
cc4c2da6 1127 goto ro_magicalize;
a0288114 1128 if (strEQ(name2, "TF8LOCALE"))
7cebcbc0 1129 goto ro_magicalize;
e07ea26a
NC
1130 if (strEQ(name2, "TF8CACHE"))
1131 goto magicalize;
cc4c2da6
NC
1132 break;
1133 case '\027': /* $^WARNING_BITS */
1134 if (strEQ(name2, "ARNING_BITS"))
1135 goto magicalize;
1136 break;
1137 case '1':
1138 case '2':
1139 case '3':
1140 case '4':
1141 case '5':
1142 case '6':
1143 case '7':
1144 case '8':
1145 case '9':
85e6fe83 1146 {
cc4c2da6
NC
1147 /* ensures variable is only digits */
1148 /* ${"1foo"} fails this test (and is thus writeable) */
1149 /* added by japhy, but borrowed from is_gv_magical */
1150 const char *end = name + len;
1151 while (--end > name) {
1152 if (!isDIGIT(*end)) return gv;
1153 }
1154 goto ro_magicalize;
1d7c1841 1155 }
dc437b57 1156 }
93a17b20 1157 }
392db708
NC
1158 } else {
1159 /* Names of length 1. (Or 0. But name is NUL terminated, so that will
1160 be case '\0' in this switch statement (ie a default case) */
cc4c2da6
NC
1161 switch (*name) {
1162 case '&':
1163 case '`':
1164 case '\'':
1165 if (
1166 sv_type == SVt_PVAV ||
1167 sv_type == SVt_PVHV ||
1168 sv_type == SVt_PVCV ||
1169 sv_type == SVt_PVFM ||
1170 sv_type == SVt_PVIO
1171 ) { break; }
1172 PL_sawampersand = TRUE;
1173 goto ro_magicalize;
1174
1175 case ':':
c69033f2 1176 sv_setpv(GvSVn(gv),PL_chopset);
cc4c2da6
NC
1177 goto magicalize;
1178
1179 case '?':
ff0cee69 1180#ifdef COMPLEX_STATUS
c69033f2 1181 SvUPGRADE(GvSVn(gv), SVt_PVLV);
ff0cee69 1182#endif
cc4c2da6 1183 goto magicalize;
ff0cee69 1184
cc4c2da6 1185 case '!':
44a2ac75
YO
1186 GvMULTI_on(gv);
1187 /* If %! has been used, automatically load Errno.pm. */
d2c93421 1188
c69033f2 1189 sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
d2c93421 1190
44a2ac75 1191 /* magicalization must be done before require_tie_mod is called */
cc4c2da6 1192 if (sv_type == SVt_PVHV)
44a2ac75 1193 require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1);
d2c93421 1194
6cef1e77 1195 break;
cc4c2da6 1196 case '-':
44a2ac75
YO
1197 case '+':
1198 GvMULTI_on(gv); /* no used once warnings here */
1199 {
1200 bool plus = (*name == '+');
1201 SV *stashname = newSVpvs("re::Tie::Hash::NamedCapture");
1202 AV* const av = GvAVn(gv);
1203 HV *const hv = GvHVn(gv);
1204 HV *const hv_tie = newHV();
1205 SV *tie = newRV_noinc((SV*)hv_tie);
1206
da51bb9b 1207 sv_bless(tie, gv_stashsv(stashname,GV_ADD));
44a2ac75
YO
1208 hv_magic(hv, (GV*)tie, PERL_MAGIC_tied);
1209 sv_magic((SV*)av, (plus ? (SV*)av : NULL), PERL_MAGIC_regdata, NULL, 0);
1210 sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
1211
1212 if (plus)
1213 SvREADONLY_on(GvSVn(gv));
1214 else
1215 Perl_hv_store(aTHX_ hv_tie, STR_WITH_LEN("all"), newSViv(1), 0);
1216
1217 SvREADONLY_on(hv);
1218 SvREADONLY_on(tie);
1219 SvREADONLY_on(av);
1220
1221 if (sv_type == SVt_PVHV)
1222 require_tie_mod(gv, name, stashname, "FETCH", 0);
1223
1224 break;
cc4c2da6
NC
1225 }
1226 case '*':
cc4c2da6
NC
1227 case '#':
1228 if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX))
1229 Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX),
8ae1fe26
RGS
1230 "$%c is no longer supported", *name);
1231 break;
cc4c2da6 1232 case '|':
c69033f2 1233 sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0);
cc4c2da6
NC
1234 goto magicalize;
1235
b3ca2e83
NC
1236 case '\010': /* $^H */
1237 {
1238 HV *const hv = GvHVn(gv);
1239 hv_magic(hv, NULL, PERL_MAGIC_hints);
1240 }
1241 goto magicalize;
cc4c2da6
NC
1242 case '\023': /* $^S */
1243 case '1':
1244 case '2':
1245 case '3':
1246 case '4':
1247 case '5':
1248 case '6':
1249 case '7':
1250 case '8':
1251 case '9':
1252 ro_magicalize:
c69033f2 1253 SvREADONLY_on(GvSVn(gv));
cc4c2da6
NC
1254 /* FALL THROUGH */
1255 case '[':
1256 case '^':
1257 case '~':
1258 case '=':
1259 case '%':
1260 case '.':
1261 case '(':
1262 case ')':
1263 case '<':
1264 case '>':
1265 case ',':
1266 case '\\':
1267 case '/':
1268 case '\001': /* $^A */
1269 case '\003': /* $^C */
1270 case '\004': /* $^D */
1271 case '\005': /* $^E */
1272 case '\006': /* $^F */
cc4c2da6
NC
1273 case '\011': /* $^I, NOT \t in EBCDIC */
1274 case '\016': /* $^N */
1275 case '\017': /* $^O */
1276 case '\020': /* $^P */
1277 case '\024': /* $^T */
1278 case '\027': /* $^W */
1279 magicalize:
c69033f2 1280 sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len);
cc4c2da6 1281 break;
e521374c 1282
cc4c2da6 1283 case '\014': /* $^L */
c69033f2
NC
1284 sv_setpvn(GvSVn(gv),"\f",1);
1285 PL_formfeed = GvSVn(gv);
463ee0b2 1286 break;
cc4c2da6 1287 case ';':
c69033f2 1288 sv_setpvn(GvSVn(gv),"\034",1);
463ee0b2 1289 break;
cc4c2da6
NC
1290 case ']':
1291 {
c69033f2 1292 SV * const sv = GvSVn(gv);
d7aa5382 1293 if (!sv_derived_from(PL_patchlevel, "version"))
7a5b473e 1294 upg_version(PL_patchlevel);
7d54d38e
SH
1295 GvSV(gv) = vnumify(PL_patchlevel);
1296 SvREADONLY_on(GvSV(gv));
1297 SvREFCNT_dec(sv);
93a17b20
LW
1298 }
1299 break;
cc4c2da6
NC
1300 case '\026': /* $^V */
1301 {
c69033f2 1302 SV * const sv = GvSVn(gv);
f9be5ac8
DM
1303 GvSV(gv) = new_version(PL_patchlevel);
1304 SvREADONLY_on(GvSV(gv));
1305 SvREFCNT_dec(sv);
16070b82
GS
1306 }
1307 break;
cc4c2da6 1308 }
79072805 1309 }
93a17b20 1310 return gv;
79072805
LW
1311}
1312
1313void
35a4481c 1314Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
43693395 1315{
35a4481c 1316 const char *name;
7423f6db 1317 STRLEN namelen;
35a4481c 1318 const HV * const hv = GvSTASH(gv);
43693395 1319 if (!hv) {
0c34ef67 1320 SvOK_off(sv);
43693395
GS
1321 return;
1322 }
666ea192 1323 sv_setpv(sv, prefix ? prefix : "");
a0288114 1324
bfcb3514 1325 name = HvNAME_get(hv);
7423f6db
NC
1326 if (name) {
1327 namelen = HvNAMELEN_get(hv);
1328 } else {
e27ad1f2 1329 name = "__ANON__";
7423f6db
NC
1330 namelen = 8;
1331 }
a0288114 1332
e27ad1f2 1333 if (keepmain || strNE(name, "main")) {
7423f6db 1334 sv_catpvn(sv,name,namelen);
396482e1 1335 sv_catpvs(sv,"::");
43693395 1336 }
257984c0 1337 sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
43693395
GS
1338}
1339
1340void
35a4481c 1341Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain)
43693395 1342{
46c461b5
AL
1343 const GV * const egv = GvEGV(gv);
1344 gv_fullname4(sv, egv ? egv : gv, prefix, keepmain);
43693395
GS
1345}
1346
79072805 1347IO *
864dbfa3 1348Perl_newIO(pTHX)
79072805 1349{
97aff369 1350 dVAR;
8990e307 1351 GV *iogv;
561b68a9 1352 IO * const io = (IO*)newSV(0);
8990e307 1353
a0d0e21e 1354 sv_upgrade((SV *)io,SVt_PVIO);
158623e7
NC
1355 /* This used to read SvREFCNT(io) = 1;
1356 It's not clear why the reference count needed an explicit reset. NWC
1357 */
1358 assert (SvREFCNT(io) == 1);
8990e307 1359 SvOBJECT_on(io);
b464bac0 1360 /* Clear the stashcache because a new IO could overrule a package name */
081fc587 1361 hv_clear(PL_stashcache);
71315bf2 1362 iogv = gv_fetchpvs("FileHandle::", 0, SVt_PVHV);
5f2d631d
GS
1363 /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */
1364 if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv))))
71315bf2 1365 iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV);
b162af07 1366 SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv)));
79072805
LW
1367 return io;
1368}
1369
1370void
1146e912 1371Perl_gv_check(pTHX_ const HV *stash)
79072805 1372{
97aff369 1373 dVAR;
79072805 1374 register I32 i;
463ee0b2 1375
8990e307
LW
1376 if (!HvARRAY(stash))
1377 return;
a0d0e21e 1378 for (i = 0; i <= (I32) HvMAX(stash); i++) {
e1ec3a88 1379 const HE *entry;
dc437b57 1380 for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
b7787f18
AL
1381 register GV *gv;
1382 HV *hv;
dc437b57 1383 if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
b862623f 1384 (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv)))
a0d0e21e 1385 {
19b6c847 1386 if (hv != PL_defstash && hv != stash)
a0d0e21e
LW
1387 gv_check(hv); /* nested package */
1388 }
dc437b57 1389 else if (isALPHA(*HeKEY(entry))) {
e1ec3a88 1390 const char *file;
dc437b57 1391 gv = (GV*)HeVAL(entry);
55d729e4 1392 if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
463ee0b2 1393 continue;
1d7c1841
GS
1394 file = GvFILE(gv);
1395 /* performance hack: if filename is absolute and it's a standard
1396 * module, don't bother warning */
6eb630b7 1397#ifdef MACOS_TRADITIONAL
551405c4 1398# define LIB_COMPONENT ":lib:"
6eb630b7 1399#else
551405c4 1400# define LIB_COMPONENT "/lib/"
6eb630b7 1401#endif
551405c4
AL
1402 if (file
1403 && PERL_FILE_IS_ABSOLUTE(file)
1404 && (instr(file, LIB_COMPONENT) || instr(file, ".pm")))
1d7c1841 1405 {
8990e307 1406 continue;
1d7c1841
GS
1407 }
1408 CopLINE_set(PL_curcop, GvLINE(gv));
1409#ifdef USE_ITHREADS
dd374669 1410 CopFILE(PL_curcop) = (char *)file; /* set for warning */
1d7c1841
GS
1411#else
1412 CopFILEGV(PL_curcop) = gv_fetchfile(file);
1413#endif
9014280d 1414 Perl_warner(aTHX_ packWARN(WARN_ONCE),
599cee73 1415 "Name \"%s::%s\" used only once: possible typo",
bfcb3514 1416 HvNAME_get(stash), GvNAME(gv));
463ee0b2 1417 }
79072805
LW
1418 }
1419 }
1420}
1421
1422GV *
e1ec3a88 1423Perl_newGVgen(pTHX_ const char *pack)
79072805 1424{
97aff369 1425 dVAR;
cea2e8a9 1426 return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++),
6fd99bb3 1427 GV_ADD, SVt_PVGV);
79072805
LW
1428}
1429
1430/* hopefully this is only called on local symbol table entries */
1431
1432GP*
864dbfa3 1433Perl_gp_ref(pTHX_ GP *gp)
79072805 1434{
97aff369 1435 dVAR;
1d7c1841 1436 if (!gp)
d4c19fe8 1437 return NULL;
79072805 1438 gp->gp_refcnt++;
44a8e56a
PP
1439 if (gp->gp_cv) {
1440 if (gp->gp_cvgen) {
1441 /* multi-named GPs cannot be used for method cache */
1442 SvREFCNT_dec(gp->gp_cv);
601f1833 1443 gp->gp_cv = NULL;
44a8e56a
PP
1444 gp->gp_cvgen = 0;
1445 }
1446 else {
1447 /* Adding a new name to a subroutine invalidates method cache */
3280af22 1448 PL_sub_generation++;
44a8e56a
PP
1449 }
1450 }
79072805 1451 return gp;
79072805
LW
1452}
1453
1454void
864dbfa3 1455Perl_gp_free(pTHX_ GV *gv)
79072805 1456{
97aff369 1457 dVAR;
79072805
LW
1458 GP* gp;
1459
f7877b28 1460 if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv)))
79072805 1461 return;
f248d071
GS
1462 if (gp->gp_refcnt == 0) {
1463 if (ckWARN_d(WARN_INTERNAL))
9014280d 1464 Perl_warner(aTHX_ packWARN(WARN_INTERNAL),
472d47bc
SB
1465 "Attempt to free unreferenced glob pointers"
1466 pTHX__FORMAT pTHX__VALUE);
79072805
LW
1467 return;
1468 }
44a8e56a
PP
1469 if (gp->gp_cv) {
1470 /* Deleting the name of a subroutine invalidates method cache */
3280af22 1471 PL_sub_generation++;
44a8e56a 1472 }
748a9306
LW
1473 if (--gp->gp_refcnt > 0) {
1474 if (gp->gp_egv == gv)
1475 gp->gp_egv = 0;
dd38834b 1476 GvGP(gv) = 0;
79072805 1477 return;
748a9306 1478 }
79072805 1479
c9ce39a9
RGS
1480 if (gp->gp_file_hek)
1481 unshare_hek(gp->gp_file_hek);
c9da69fb
AL
1482 SvREFCNT_dec(gp->gp_sv);
1483 SvREFCNT_dec(gp->gp_av);
bfcb3514
NC
1484 /* FIXME - another reference loop GV -> symtab -> GV ?
1485 Somehow gp->gp_hv can end up pointing at freed garbage. */
1486 if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) {
bfcb3514
NC
1487 const char *hvname = HvNAME_get(gp->gp_hv);
1488 if (PL_stashcache && hvname)
7423f6db
NC
1489 hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv),
1490 G_DISCARD);
bfcb3514 1491 SvREFCNT_dec(gp->gp_hv);
13207a71 1492 }
c9da69fb
AL
1493 SvREFCNT_dec(gp->gp_io);
1494 SvREFCNT_dec(gp->gp_cv);
1495 SvREFCNT_dec(gp->gp_form);
748a9306 1496
79072805
LW
1497 Safefree(gp);
1498 GvGP(gv) = 0;
1499}
1500
d460ef45
NIS
1501int
1502Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg)
1503{
53c1dcc0
AL
1504 AMT * const amtp = (AMT*)mg->mg_ptr;
1505 PERL_UNUSED_ARG(sv);
dd374669 1506
d460ef45
NIS
1507 if (amtp && AMT_AMAGIC(amtp)) {
1508 int i;
1509 for (i = 1; i < NofAMmeth; i++) {
53c1dcc0 1510 CV * const cv = amtp->table[i];
b37c2d43 1511 if (cv) {
d460ef45 1512 SvREFCNT_dec((SV *) cv);
601f1833 1513 amtp->table[i] = NULL;
d460ef45
NIS
1514 }
1515 }
1516 }
1517 return 0;
1518}
1519
a0d0e21e
LW
1520/* Updates and caches the CV's */
1521
1522bool
864dbfa3 1523Perl_Gv_AMupdate(pTHX_ HV *stash)
a0d0e21e 1524{
97aff369 1525 dVAR;
53c1dcc0 1526 MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
a6006777 1527 AMT amt;
a0d0e21e 1528
14899595
NC
1529 if (mg) {
1530 const AMT * const amtp = (AMT*)mg->mg_ptr;
1531 if (amtp->was_ok_am == PL_amagic_generation
1532 && amtp->was_ok_sub == PL_sub_generation) {
1533 return (bool)AMT_OVERLOADED(amtp);
1534 }
1535 sv_unmagic((SV*)stash, PERL_MAGIC_overload_table);
1536 }
a0d0e21e 1537
bfcb3514 1538 DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) );
a0d0e21e 1539
d460ef45 1540 Zero(&amt,1,AMT);
3280af22
NIS
1541 amt.was_ok_am = PL_amagic_generation;
1542 amt.was_ok_sub = PL_sub_generation;
a6006777
PP
1543 amt.fallback = AMGfallNO;
1544 amt.flags = 0;
1545
a6006777 1546 {
32251b26
IZ
1547 int filled = 0, have_ovl = 0;
1548 int i, lim = 1;
a6006777 1549
22c35a8c 1550 /* Work with "fallback" key, which we assume to be first in PL_AMG_names */
a6006777 1551
89ffc314 1552 /* Try to find via inheritance. */
53c1dcc0
AL
1553 GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1);
1554 SV * const sv = gv ? GvSV(gv) : NULL;
1555 CV* cv;
89ffc314
IZ
1556
1557 if (!gv)
32251b26 1558 lim = DESTROY_amg; /* Skip overloading entries. */
c69033f2
NC
1559#ifdef PERL_DONT_CREATE_GVSV
1560 else if (!sv) {
6f207bd3 1561 NOOP; /* Equivalent to !SvTRUE and !SvOK */
c69033f2
NC
1562 }
1563#endif
89ffc314
IZ
1564 else if (SvTRUE(sv))
1565 amt.fallback=AMGfallYES;
1566 else if (SvOK(sv))
1567 amt.fallback=AMGfallNEVER;
a6006777 1568
32251b26 1569 for (i = 1; i < lim; i++)
601f1833 1570 amt.table[i] = NULL;
32251b26 1571 for (; i < NofAMmeth; i++) {
6136c704 1572 const char * const cooky = PL_AMG_names[i];
32251b26 1573 /* Human-readable form, for debugging: */
6136c704 1574 const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i));
e1ec3a88 1575 const STRLEN l = strlen(cooky);
89ffc314 1576
a0288114 1577 DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n",
bfcb3514 1578 cp, HvNAME_get(stash)) );
611c1e95
IZ
1579 /* don't fill the cache while looking up!
1580 Creation of inheritance stubs in intermediate packages may
1581 conflict with the logic of runtime method substitution.
1582 Indeed, for inheritance A -> B -> C, if C overloads "+0",
1583 then we could have created stubs for "(+0" in A and C too.
1584 But if B overloads "bool", we may want to use it for
1585 numifying instead of C's "+0". */
1586 if (i >= DESTROY_amg)
1587 gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0);
1588 else /* Autoload taken care of below */
1589 gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1);
46fc3d4c 1590 cv = 0;
89ffc314 1591 if (gv && (cv = GvCV(gv))) {
bfcb3514 1592 const char *hvname;
44a8e56a 1593 if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
bfcb3514 1594 && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) {
611c1e95
IZ
1595 /* This is a hack to support autoloading..., while
1596 knowing *which* methods were declared as overloaded. */
44a8e56a 1597 /* GvSV contains the name of the method. */
6136c704 1598 GV *ngv = NULL;
c69033f2 1599 SV *gvsv = GvSV(gv);
a0288114
AL
1600
1601 DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\
1602 "\" for overloaded \"%s\" in package \"%.256s\"\n",
ca0270c4 1603 (void*)GvSV(gv), cp, hvname) );
c69033f2
NC
1604 if (!gvsv || !SvPOK(gvsv)
1605 || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv),
dc848c6f
PP
1606 FALSE)))
1607 {
a0288114 1608 /* Can be an import stub (created by "can"). */
666ea192 1609 const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???";
a0288114
AL
1610 Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\
1611 "in package \"%.256s\"",
35c1215d
NC
1612 (GvCVGEN(gv) ? "Stub found while resolving"
1613 : "Can't resolve"),
bfcb3514 1614 name, cp, hvname);
44a8e56a 1615 }
dc848c6f 1616 cv = GvCV(gv = ngv);
44a8e56a 1617 }
b464bac0 1618 DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n",
bfcb3514 1619 cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))),
44a8e56a
PP
1620 GvNAME(CvGV(cv))) );
1621 filled = 1;
32251b26
IZ
1622 if (i < DESTROY_amg)
1623 have_ovl = 1;
611c1e95
IZ
1624 } else if (gv) { /* Autoloaded... */
1625 cv = (CV*)gv;
1626 filled = 1;
44a8e56a 1627 }
b37c2d43 1628 amt.table[i]=(CV*)SvREFCNT_inc_simple(cv);
a0d0e21e 1629 }
a0d0e21e 1630 if (filled) {
a6006777 1631 AMT_AMAGIC_on(&amt);
32251b26
IZ
1632 if (have_ovl)
1633 AMT_OVERLOADED_on(&amt);
14befaf4
DM
1634 sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
1635 (char*)&amt, sizeof(AMT));
32251b26 1636 return have_ovl;
a0d0e21e
LW
1637 }
1638 }
a6006777 1639 /* Here we have no table: */
9cbac4c7 1640 /* no_table: */
a6006777 1641 AMT_AMAGIC_off(&amt);
14befaf4
DM
1642 sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table,
1643 (char*)&amt, sizeof(AMTS));
a0d0e21e
LW
1644 return FALSE;
1645}
1646
32251b26
IZ
1647
1648CV*
1649Perl_gv_handler(pTHX_ HV *stash, I32 id)
1650{
97aff369 1651 dVAR;
3f8f4626 1652 MAGIC *mg;
32251b26
IZ
1653 AMT *amtp;
1654
bfcb3514 1655 if (!stash || !HvNAME_get(stash))
601f1833 1656 return NULL;
14befaf4 1657 mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
32251b26
IZ
1658 if (!mg) {
1659 do_update:
1660 Gv_AMupdate(stash);
14befaf4 1661 mg = mg_find((SV*)stash, PERL_MAGIC_overload_table);
32251b26 1662 }
a9fd4e40 1663 assert(mg);
32251b26
IZ
1664 amtp = (AMT*)mg->mg_ptr;
1665 if ( amtp->was_ok_am != PL_amagic_generation
1666 || amtp->was_ok_sub != PL_sub_generation )
1667 goto do_update;
3ad83ce7 1668 if (AMT_AMAGIC(amtp)) {
b7787f18 1669 CV * const ret = amtp->table[id];
3ad83ce7
AMS
1670 if (ret && isGV(ret)) { /* Autoloading stab */
1671 /* Passing it through may have resulted in a warning
1672 "Inherited AUTOLOAD for a non-method deprecated", since
1673 our caller is going through a function call, not a method call.
1674 So return the CV for AUTOLOAD, setting $AUTOLOAD. */
890ce7af 1675 GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]);
3ad83ce7
AMS
1676
1677 if (gv && GvCV(gv))
1678 return GvCV(gv);
1679 }
1680 return ret;
1681 }
a0288114 1682
601f1833 1683 return NULL;
32251b26
IZ
1684}
1685
1686
a0d0e21e 1687SV*
864dbfa3 1688Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags)
a0d0e21e 1689{
27da23d5 1690 dVAR;
b267980d 1691 MAGIC *mg;
9c5ffd7c 1692 CV *cv=NULL;
a0d0e21e 1693 CV **cvp=NULL, **ocvp=NULL;
9c5ffd7c 1694 AMT *amtp=NULL, *oamtp=NULL;
b464bac0
AL
1695 int off = 0, off1, lr = 0, notfound = 0;
1696 int postpr = 0, force_cpy = 0;
1697 int assign = AMGf_assign & flags;
1698 const int assignshift = assign ? 1 : 0;
497b47a8
JH
1699#ifdef DEBUGGING
1700 int fl=0;
497b47a8 1701#endif
25716404 1702 HV* stash=NULL;
a0d0e21e 1703 if (!(AMGf_noleft & flags) && SvAMAGIC(left)
25716404
GS
1704 && (stash = SvSTASH(SvRV(left)))
1705 && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
b267980d 1706 && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
a6006777 1707 ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
d4c19fe8 1708 : NULL))
b267980d 1709 && ((cv = cvp[off=method+assignshift])
748a9306
LW
1710 || (assign && amtp->fallback > AMGfallNEVER && /* fallback to
1711 * usual method */
497b47a8
JH
1712 (
1713#ifdef DEBUGGING
1714 fl = 1,
a0288114 1715#endif
497b47a8 1716 cv = cvp[off=method])))) {
a0d0e21e
LW
1717 lr = -1; /* Call method for left argument */
1718 } else {
1719 if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
1720 int logic;
1721
1722 /* look for substituted methods */
ee239bfe 1723 /* In all the covered cases we should be called with assign==0. */
a0d0e21e
LW
1724 switch (method) {
1725 case inc_amg:
ee239bfe
IZ
1726 force_cpy = 1;
1727 if ((cv = cvp[off=add_ass_amg])
1728 || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
3280af22 1729 right = &PL_sv_yes; lr = -1; assign = 1;
a0d0e21e
LW
1730 }
1731 break;
1732 case dec_amg:
ee239bfe
IZ
1733 force_cpy = 1;
1734 if ((cv = cvp[off = subtr_ass_amg])
1735 || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
3280af22 1736 right = &PL_sv_yes; lr = -1; assign = 1;
a0d0e21e
LW
1737 }
1738 break;
1739 case bool__amg:
1740 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
1741 break;
1742 case numer_amg:
1743 (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
1744 break;
1745 case string_amg:
1746 (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
1747 break;
b7787f18
AL
1748 case not_amg:
1749 (void)((cv = cvp[off=bool__amg])
1750 || (cv = cvp[off=numer_amg])
1751 || (cv = cvp[off=string_amg]));
1752 postpr = 1;
1753 break;
748a9306
LW
1754 case copy_amg:
1755 {
76e3520e
GS
1756 /*
1757 * SV* ref causes confusion with the interpreter variable of
1758 * the same name
1759 */
890ce7af 1760 SV* const tmpRef=SvRV(left);
76e3520e 1761 if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
fc36a67e
PP
1762 /*
1763 * Just to be extra cautious. Maybe in some
1764 * additional cases sv_setsv is safe, too.
1765 */
890ce7af 1766 SV* const newref = newSVsv(tmpRef);
748a9306 1767 SvOBJECT_on(newref);
96d4b0ee
NC
1768 /* As a bit of a source compatibility hack, SvAMAGIC() and
1769 friends dereference an RV, to behave the same was as when
1770 overloading was stored on the reference, not the referant.
1771 Hence we can't use SvAMAGIC_on()
1772 */
1773 SvFLAGS(newref) |= SVf_AMAGIC;
b162af07 1774 SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef)));
748a9306
LW
1775 return newref;
1776 }
1777 }
1778 break;
a0d0e21e 1779 case abs_amg:
b267980d 1780 if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
a0d0e21e 1781 && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
890ce7af 1782 SV* const nullsv=sv_2mortal(newSViv(0));
a0d0e21e 1783 if (off1==lt_amg) {
890ce7af 1784 SV* const lessp = amagic_call(left,nullsv,
a0d0e21e
LW
1785 lt_amg,AMGf_noright);
1786 logic = SvTRUE(lessp);
1787 } else {
890ce7af 1788 SV* const lessp = amagic_call(left,nullsv,
a0d0e21e
LW
1789 ncmp_amg,AMGf_noright);
1790 logic = (SvNV(lessp) < 0);
1791 }
1792 if (logic) {
1793 if (off==subtr_amg) {
1794 right = left;
748a9306 1795 left = nullsv;
a0d0e21e
LW
1796 lr = 1;
1797 }
1798 } else {
1799 return left;
1800 }
1801 }
1802 break;
1803 case neg_amg:
155aba94 1804 if ((cv = cvp[off=subtr_amg])) {
a0d0e21e
LW
1805 right = left;
1806 left = sv_2mortal(newSViv(0));
1807 lr = 1;
1808 }
1809 break;
f216259d 1810 case int_amg:
f5284f61 1811 case iter_amg: /* XXXX Eventually should do to_gv. */
b267980d
NIS
1812 /* FAIL safe */
1813 return NULL; /* Delegate operation to standard mechanisms. */
1814 break;
f5284f61
IZ
1815 case to_sv_amg:
1816 case to_av_amg:
1817 case to_hv_amg:
1818 case to_gv_amg:
1819 case to_cv_amg:
1820 /* FAIL safe */
b267980d 1821 return left; /* Delegate operation to standard mechanisms. */
f5284f61 1822 break;
a0d0e21e
LW
1823 default:
1824 goto not_found;
1825 }
1826 if (!cv) goto not_found;
1827 } else if (!(AMGf_noright & flags) && SvAMAGIC(right)
25716404
GS
1828 && (stash = SvSTASH(SvRV(right)))
1829 && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table))
b267980d 1830 && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
a6006777 1831 ? (amtp = (AMT*)mg->mg_ptr)->table
d4c19fe8 1832 : NULL))
a0d0e21e
LW
1833 && (cv = cvp[off=method])) { /* Method for right
1834 * argument found */
1835 lr=1;
b267980d
NIS
1836 } else if (((ocvp && oamtp->fallback > AMGfallNEVER
1837 && (cvp=ocvp) && (lr = -1))
a0d0e21e
LW
1838 || (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
1839 && !(flags & AMGf_unary)) {
1840 /* We look for substitution for
1841 * comparison operations and
fc36a67e 1842 * concatenation */
a0d0e21e
LW
1843 if (method==concat_amg || method==concat_ass_amg
1844 || method==repeat_amg || method==repeat_ass_amg) {
1845 return NULL; /* Delegate operation to string conversion */
1846 }
1847 off = -1;
1848 switch (method) {
1849 case lt_amg:
1850 case le_amg:
1851 case gt_amg:
1852 case ge_amg:
1853 case eq_amg:
1854 case ne_amg:
1855 postpr = 1; off=ncmp_amg; break;
1856 case slt_amg:
1857 case sle_amg:
1858 case sgt_amg:
1859 case sge_amg:
1860 case seq_amg:
1861 case sne_amg:
1862 postpr = 1; off=scmp_amg; break;
1863 }
1864 if (off != -1) cv = cvp[off];
1865 if (!cv) {
1866 goto not_found;
1867 }
1868 } else {
a6006777 1869 not_found: /* No method found, either report or croak */
b267980d
NIS
1870 switch (method) {
1871 case to_sv_amg:
1872 case to_av_amg:
1873 case to_hv_amg:
1874 case to_gv_amg:
1875 case to_cv_amg:
1876 /* FAIL safe */
1877 return left; /* Delegate operation to standard mechanisms. */
1878 break;
1879 }
a0d0e21e
LW
1880 if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
1881 notfound = 1; lr = -1;
1882 } else if (cvp && (cv=cvp[nomethod_amg])) {
1883 notfound = 1; lr = 1;
4cc0ca18
NC
1884 } else if ((amtp && amtp->fallback >= AMGfallYES) && !DEBUG_o_TEST) {
1885 /* Skip generating the "no method found" message. */
1886 return NULL;
a0d0e21e 1887 } else {
46fc3d4c 1888 SV *msg;
774d564b 1889 if (off==-1) off=method;
b267980d 1890 msg = sv_2mortal(Perl_newSVpvf(aTHX_
a0288114 1891 "Operation \"%s\": no method found,%sargument %s%s%s%s",
89ffc314 1892 AMG_id2name(method + assignshift),
e7ea3e70 1893 (flags & AMGf_unary ? " " : "\n\tleft "),
b267980d 1894 SvAMAGIC(left)?
a0d0e21e
LW
1895 "in overloaded package ":
1896 "has no overloaded magic",
b267980d 1897 SvAMAGIC(left)?
bfcb3514 1898 HvNAME_get(SvSTASH(SvRV(left))):
a0d0e21e 1899 "",
b267980d 1900 SvAMAGIC(right)?
e7ea3e70 1901 ",\n\tright argument in overloaded package ":
b267980d 1902 (flags & AMGf_unary
e7ea3e70
IZ
1903 ? ""
1904 : ",\n\tright argument has no overloaded magic"),
b267980d 1905 SvAMAGIC(right)?
bfcb3514 1906 HvNAME_get(SvSTASH(SvRV(right))):
46fc3d4c 1907 ""));
a0d0e21e 1908 if (amtp && amtp->fallback >= AMGfallYES) {
b15aece3 1909 DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) );
a0d0e21e 1910 } else {
be2597df 1911 Perl_croak(aTHX_ "%"SVf, SVfARG(msg));
a0d0e21e
LW
1912 }
1913 return NULL;
1914 }
ee239bfe 1915 force_cpy = force_cpy || assign;
a0d0e21e
LW
1916 }
1917 }
497b47a8 1918#ifdef DEBUGGING
a0d0e21e 1919 if (!notfound) {
497b47a8 1920 DEBUG_o(Perl_deb(aTHX_
a0288114 1921 "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n",
497b47a8
JH
1922 AMG_id2name(off),
1923 method+assignshift==off? "" :
a0288114 1924 " (initially \"",
497b47a8
JH
1925 method+assignshift==off? "" :
1926 AMG_id2name(method+assignshift),
a0288114 1927 method+assignshift==off? "" : "\")",
497b47a8
JH
1928 flags & AMGf_unary? "" :
1929 lr==1 ? " for right argument": " for left argument",
1930 flags & AMGf_unary? " for argument" : "",
bfcb3514 1931 stash ? HvNAME_get(stash) : "null",
497b47a8 1932 fl? ",\n\tassignment variant used": "") );
ee239bfe 1933 }
497b47a8 1934#endif
748a9306
LW
1935 /* Since we use shallow copy during assignment, we need
1936 * to dublicate the contents, probably calling user-supplied
1937 * version of copy operator
1938 */
ee239bfe
IZ
1939 /* We need to copy in following cases:
1940 * a) Assignment form was called.
1941 * assignshift==1, assign==T, method + 1 == off
1942 * b) Increment or decrement, called directly.
1943 * assignshift==0, assign==0, method + 0 == off
1944 * c) Increment or decrement, translated to assignment add/subtr.
b267980d 1945 * assignshift==0, assign==T,
ee239bfe
IZ
1946 * force_cpy == T
1947 * d) Increment or decrement, translated to nomethod.
b267980d 1948 * assignshift==0, assign==0,
ee239bfe
IZ
1949 * force_cpy == T
1950 * e) Assignment form translated to nomethod.
1951 * assignshift==1, assign==T, method + 1 != off
1952 * force_cpy == T
1953 */
1954 /* off is method, method+assignshift, or a result of opcode substitution.
1955 * In the latter case assignshift==0, so only notfound case is important.
1956 */
1957 if (( (method + assignshift == off)
1958 && (assign || (method == inc_amg) || (method == dec_amg)))
1959 || force_cpy)
1960 RvDEEPCP(left);
a0d0e21e
LW
1961 {
1962 dSP;
1963 BINOP myop;
1964 SV* res;
b7787f18 1965 const bool oldcatch = CATCH_GET;
a0d0e21e 1966
54310121 1967 CATCH_SET(TRUE);
a0d0e21e
LW
1968 Zero(&myop, 1, BINOP);
1969 myop.op_last = (OP *) &myop;
b37c2d43 1970 myop.op_next = NULL;
54310121 1971 myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
a0d0e21e 1972
e788e7d3 1973 PUSHSTACKi(PERLSI_OVERLOAD);
a0d0e21e 1974 ENTER;
462e5cf6 1975 SAVEOP();
533c011a 1976 PL_op = (OP *) &myop;
3280af22 1977 if (PERLDB_SUB && PL_curstash != PL_debstash)
533c011a 1978 PL_op->op_private |= OPpENTERSUB_DB;
a0d0e21e 1979 PUTBACK;
cea2e8a9 1980 pp_pushmark();
a0d0e21e 1981
924508f0 1982 EXTEND(SP, notfound + 5);
a0d0e21e
LW
1983 PUSHs(lr>0? right: left);
1984 PUSHs(lr>0? left: right);
3280af22 1985 PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
a0d0e21e 1986 if (notfound) {
89ffc314 1987 PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0)));
a0d0e21e
LW
1988 }
1989 PUSHs((SV*)cv);
1990 PUTBACK;
1991
155aba94 1992 if ((PL_op = Perl_pp_entersub(aTHX)))
cea2e8a9 1993 CALLRUNOPS(aTHX);
a0d0e21e
LW
1994 LEAVE;
1995 SPAGAIN;
1996
1997 res=POPs;
ebafeae7 1998 PUTBACK;
d3acc0f7 1999 POPSTACK;
54310121 2000 CATCH_SET(oldcatch);
a0d0e21e 2001
a0d0e21e 2002 if (postpr) {
b7787f18 2003 int ans;
a0d0e21e
LW
2004 switch (method) {
2005 case le_amg:
2006 case sle_amg:
2007 ans=SvIV(res)<=0; break;
2008 case lt_amg:
2009 case slt_amg:
2010 ans=SvIV(res)<0; break;
2011 case ge_amg:
2012 case sge_amg:
2013 ans=SvIV(res)>=0; break;
2014 case gt_amg:
2015 case sgt_amg:
2016 ans=SvIV(res)>0; break;
2017 case eq_amg:
2018 case seq_amg:
2019 ans=SvIV(res)==0; break;
2020 case ne_amg:
2021 case sne_amg:
2022 ans=SvIV(res)!=0; break;
2023 case inc_amg:
2024 case dec_amg:
bbce6d69 2025 SvSetSV(left,res); return left;
dc437b57 2026 case not_amg:
fe7ac86a 2027 ans=!SvTRUE(res); break;
b7787f18
AL
2028 default:
2029 ans=0; break;
a0d0e21e 2030 }
54310121 2031 return boolSV(ans);
748a9306
LW
2032 } else if (method==copy_amg) {
2033 if (!SvROK(res)) {
cea2e8a9 2034 Perl_croak(aTHX_ "Copy method did not return a reference");
748a9306
LW
2035 }
2036 return SvREFCNT_inc(SvRV(res));
a0d0e21e
LW
2037 } else {
2038 return res;
2039 }
2040 }
2041}
c9d5ac95
GS
2042
2043/*
7fc63493 2044=for apidoc is_gv_magical_sv
c9d5ac95 2045
7a5fd60d
NC
2046Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical.
2047
2048=cut
2049*/
2050
2051bool
2052Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags)
2053{
2054 STRLEN len;
b64e5050 2055 const char * const temp = SvPV_const(name, len);
7a5fd60d
NC
2056 return is_gv_magical(temp, len, flags);
2057}
2058
2059/*
2060=for apidoc is_gv_magical
2061
c9d5ac95
GS
2062Returns C<TRUE> if given the name of a magical GV.
2063
2064Currently only useful internally when determining if a GV should be
2065created even in rvalue contexts.
2066
2067C<flags> is not used at present but available for future extension to
2068allow selecting particular classes of magical variable.
2069
b9b0e72c
NC
2070Currently assumes that C<name> is NUL terminated (as well as len being valid).
2071This assumption is met by all callers within the perl core, which all pass
2072pointers returned by SvPV.
2073
c9d5ac95
GS
2074=cut
2075*/
2076bool
7fc63493 2077Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags)
c9d5ac95 2078{
b37c2d43 2079 PERL_UNUSED_CONTEXT;
9d4ba2ae
AL
2080 PERL_UNUSED_ARG(flags);
2081
b9b0e72c 2082 if (len > 1) {
b464bac0 2083 const char * const name1 = name + 1;
b9b0e72c
NC
2084 switch (*name) {
2085 case 'I':
9431620d 2086 if (len == 3 && name1[1] == 'S' && name[2] == 'A')
b9b0e72c
NC
2087 goto yes;
2088 break;
2089 case 'O':
9431620d 2090 if (len == 8 && strEQ(name1, "VERLOAD"))
b9b0e72c
NC
2091 goto yes;
2092 break;
2093 case 'S':
9431620d 2094 if (len == 3 && name[1] == 'I' && name[2] == 'G')
b9b0e72c
NC
2095 goto yes;
2096 break;
2097 /* Using ${^...} variables is likely to be sufficiently rare that
2098 it seems sensible to avoid the space hit of also checking the
2099 length. */
2100 case '\017': /* ${^OPEN} */
9431620d 2101 if (strEQ(name1, "PEN"))
b9b0e72c
NC
2102 goto yes;
2103 break;
2104 case '\024': /* ${^TAINT} */
9431620d 2105 if (strEQ(name1, "AINT"))
b9b0e72c
NC
2106 goto yes;
2107 break;
2108 case '\025': /* ${^UNICODE} */
9431620d 2109 if (strEQ(name1, "NICODE"))
b9b0e72c 2110 goto yes;
a0288114 2111 if (strEQ(name1, "TF8LOCALE"))
7cebcbc0 2112 goto yes;
b9b0e72c
NC
2113 break;
2114 case '\027': /* ${^WARNING_BITS} */
9431620d 2115 if (strEQ(name1, "ARNING_BITS"))
b9b0e72c
NC
2116 goto yes;
2117 break;
2118 case '1':
2119 case '2':
2120 case '3':
2121 case '4':
2122 case '5':
2123 case '6':
2124 case '7':
2125 case '8':
2126 case '9':
c9d5ac95 2127 {
7fc63493 2128 const char *end = name + len;
c9d5ac95
GS
2129 while (--end > name) {
2130 if (!isDIGIT(*end))
2131 return FALSE;
2132 }
b9b0e72c
NC
2133 goto yes;
2134 }
2135 }
2136 } else {
2137 /* Because we're already assuming that name is NUL terminated
2138 below, we can treat an empty name as "\0" */
2139 switch (*name) {
2140 case '&':
2141 case '`':
2142 case '\'':
2143 case ':':
2144 case '?':
2145 case '!':
2146 case '-':
2147 case '#':
2148 case '[':
2149 case '^':
2150 case '~':
2151 case '=':
2152 case '%':
2153 case '.':
2154 case '(':
2155 case ')':
2156 case '<':
2157 case '>':
2158 case ',':
2159 case '\\':
2160 case '/':
2161 case '|':
2162 case '+':
2163 case ';':
2164 case ']':
2165 case '\001': /* $^A */
2166 case '\003': /* $^C */
2167 case '\004': /* $^D */
2168 case '\005': /* $^E */
2169 case '\006': /* $^F */
2170 case '\010': /* $^H */
2171 case '\011': /* $^I, NOT \t in EBCDIC */
2172 case '\014': /* $^L */
2173 case '\016': /* $^N */
2174 case '\017': /* $^O */
2175 case '\020': /* $^P */
2176 case '\023': /* $^S */
2177 case '\024': /* $^T */
2178 case '\026': /* $^V */
2179 case '\027': /* $^W */
2180 case '1':
2181 case '2':
2182 case '3':
2183 case '4':
2184 case '5':
2185 case '6':
2186 case '7':
2187 case '8':
2188 case '9':
2189 yes:
2190 return TRUE;
2191 default:
2192 break;
c9d5ac95 2193 }
c9d5ac95
GS
2194 }
2195 return FALSE;
2196}
66610fdd 2197
f5c1e807
NC
2198void
2199Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags)
2200{
2201 dVAR;
acda4c6a 2202 U32 hash;
f5c1e807 2203
9f616d01 2204 assert(name);
f5c1e807
NC
2205 PERL_UNUSED_ARG(flags);
2206
acda4c6a
NC
2207 if (len > I32_MAX)
2208 Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len);
2209
ae8cc45f
NC
2210 if (!(flags & GV_ADD) && GvNAME_HEK(gv)) {
2211 unshare_hek(GvNAME_HEK(gv));
2212 }
2213
acda4c6a 2214 PERL_HASH(hash, name, len);
9f616d01 2215 GvNAME_HEK(gv) = share_hek(name, len, hash);
f5c1e807
NC
2216}
2217
66610fdd
RGS
2218/*
2219 * Local variables:
2220 * c-indentation-style: bsd
2221 * c-basic-offset: 4
2222 * indent-tabs-mode: t
2223 * End:
2224 *
37442d52
RGS
2225 * ex: set ts=8 sts=4 sw=4 noet:
2226 */