Commit | Line | Data |
---|---|---|
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 | |
23 | A GV is a structure which corresponds to to a Perl typeglob, ie *foo. | |
24 | It is a structure that holds a pointer to a scalar, an array, a hash etc, | |
25 | corresponding to $foo, @foo, %foo. | |
26 | ||
27 | GVs are usually found as values in stashes (symbol table hashes) where | |
28 | Perl stores its global variables. | |
29 | ||
30 | =cut | |
ccfc67b7 JH |
31 | */ |
32 | ||
79072805 | 33 | #include "EXTERN.h" |
864dbfa3 | 34 | #define PERL_IN_GV_C |
79072805 | 35 | #include "perl.h" |
8261f8eb | 36 | #include "overload.c" |
79072805 | 37 | |
f54cb97a AL |
38 | static const char S_autoload[] = "AUTOLOAD"; |
39 | static const STRLEN S_autolen = sizeof(S_autoload)-1; | |
5c7983e5 | 40 | |
c69033f2 NC |
41 | |
42 | #ifdef PERL_DONT_CREATE_GVSV | |
43 | GV * | |
44 | Perl_gv_SVadd(pTHX_ GV *gv) | |
45 | { | |
7918f24d NC |
46 | PERL_ARGS_ASSERT_GV_SVADD; |
47 | ||
c69033f2 NC |
48 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
49 | Perl_croak(aTHX_ "Bad symbol for scalar"); | |
50 | if (!GvSV(gv)) | |
561b68a9 | 51 | GvSV(gv) = newSV(0); |
c69033f2 NC |
52 | return gv; |
53 | } | |
54 | #endif | |
55 | ||
79072805 | 56 | GV * |
864dbfa3 | 57 | Perl_gv_AVadd(pTHX_ register GV *gv) |
79072805 | 58 | { |
7918f24d NC |
59 | PERL_ARGS_ASSERT_GV_AVADD; |
60 | ||
a0d0e21e | 61 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 | 62 | Perl_croak(aTHX_ "Bad symbol for array"); |
79072805 LW |
63 | if (!GvAV(gv)) |
64 | GvAV(gv) = newAV(); | |
65 | return gv; | |
66 | } | |
67 | ||
68 | GV * | |
864dbfa3 | 69 | Perl_gv_HVadd(pTHX_ register GV *gv) |
79072805 | 70 | { |
7918f24d NC |
71 | PERL_ARGS_ASSERT_GV_HVADD; |
72 | ||
a0d0e21e | 73 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 | 74 | Perl_croak(aTHX_ "Bad symbol for hash"); |
79072805 | 75 | if (!GvHV(gv)) |
463ee0b2 | 76 | GvHV(gv) = newHV(); |
79072805 LW |
77 | return gv; |
78 | } | |
79 | ||
80 | GV * | |
864dbfa3 | 81 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e | 82 | { |
97aff369 | 83 | dVAR; |
7918f24d NC |
84 | |
85 | PERL_ARGS_ASSERT_GV_IOADD; | |
86 | ||
8b5be85c SP |
87 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) { |
88 | ||
89 | /* | |
90 | * if it walks like a dirhandle, then let's assume that | |
91 | * this is a dirhandle. | |
92 | */ | |
b37c2d43 | 93 | const char * const fh = |
666ea192 JH |
94 | PL_op->op_type == OP_READDIR || |
95 | PL_op->op_type == OP_TELLDIR || | |
96 | PL_op->op_type == OP_SEEKDIR || | |
97 | PL_op->op_type == OP_REWINDDIR || | |
98 | PL_op->op_type == OP_CLOSEDIR ? | |
99 | "dirhandle" : "filehandle"; | |
8b5be85c SP |
100 | Perl_croak(aTHX_ "Bad symbol for %s", fh); |
101 | } | |
102 | ||
5bd07a3d | 103 | if (!GvIOp(gv)) { |
7fb37951 AMS |
104 | #ifdef GV_UNIQUE_CHECK |
105 | if (GvUNIQUE(gv)) { | |
106 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); | |
5bd07a3d DM |
107 | } |
108 | #endif | |
a0d0e21e | 109 | GvIOp(gv) = newIO(); |
5bd07a3d | 110 | } |
a0d0e21e LW |
111 | return gv; |
112 | } | |
113 | ||
114 | GV * | |
864dbfa3 | 115 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 116 | { |
7918f24d | 117 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec NC |
118 | return gv_fetchfile_flags(name, strlen(name), 0); |
119 | } | |
120 | ||
121 | GV * | |
122 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
123 | const U32 flags) | |
124 | { | |
97aff369 | 125 | dVAR; |
4116122e | 126 | char smallbuf[128]; |
53d95988 | 127 | char *tmpbuf; |
d9095cec | 128 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
129 | GV *gv; |
130 | ||
7918f24d | 131 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec NC |
132 | PERL_UNUSED_ARG(flags); |
133 | ||
1d7c1841 | 134 | if (!PL_defstash) |
a0714e2c | 135 | return NULL; |
1d7c1841 | 136 | |
d9095cec | 137 | if (tmplen <= sizeof smallbuf) |
53d95988 CS |
138 | tmpbuf = smallbuf; |
139 | else | |
798b63bc | 140 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 141 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
142 | tmpbuf[0] = '_'; |
143 | tmpbuf[1] = '<'; | |
d9095cec NC |
144 | memcpy(tmpbuf + 2, name, namelen); |
145 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); | |
1d7c1841 | 146 | if (!isGV(gv)) { |
d9095cec | 147 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 | 148 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec | 149 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 150 | #else |
d9095cec | 151 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 152 | #endif |
1d7c1841 | 153 | if (PERLDB_LINE) |
a0714e2c | 154 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); |
1d7c1841 | 155 | } |
53d95988 CS |
156 | if (tmpbuf != smallbuf) |
157 | Safefree(tmpbuf); | |
79072805 LW |
158 | return gv; |
159 | } | |
160 | ||
62d55b22 NC |
161 | /* |
162 | =for apidoc gv_const_sv | |
163 | ||
164 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
165 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
166 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
167 | NULL. | |
168 | ||
169 | =cut | |
170 | */ | |
171 | ||
172 | SV * | |
173 | Perl_gv_const_sv(pTHX_ GV *gv) | |
174 | { | |
7918f24d NC |
175 | PERL_ARGS_ASSERT_GV_CONST_SV; |
176 | ||
62d55b22 NC |
177 | if (SvTYPE(gv) == SVt_PVGV) |
178 | return cv_const_sv(GvCVu(gv)); | |
179 | return SvROK(gv) ? SvRV(gv) : NULL; | |
180 | } | |
181 | ||
12816592 NC |
182 | GP * |
183 | Perl_newGP(pTHX_ GV *const gv) | |
184 | { | |
185 | GP *gp; | |
19bad673 NC |
186 | U32 hash; |
187 | #ifdef USE_ITHREADS | |
1df5f7c1 NC |
188 | const char *const file |
189 | = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : ""; | |
19bad673 NC |
190 | const STRLEN len = strlen(file); |
191 | #else | |
192 | SV *const temp_sv = CopFILESV(PL_curcop); | |
193 | const char *file; | |
194 | STRLEN len; | |
195 | ||
7918f24d NC |
196 | PERL_ARGS_ASSERT_NEWGP; |
197 | ||
19bad673 NC |
198 | if (temp_sv) { |
199 | file = SvPVX(temp_sv); | |
200 | len = SvCUR(temp_sv); | |
201 | } else { | |
202 | file = ""; | |
203 | len = 0; | |
204 | } | |
205 | #endif | |
f4890806 NC |
206 | |
207 | PERL_HASH(hash, file, len); | |
208 | ||
12816592 NC |
209 | Newxz(gp, 1, GP); |
210 | ||
211 | #ifndef PERL_DONT_CREATE_GVSV | |
b5c2dcb8 | 212 | gp->gp_sv = newSV(0); |
12816592 NC |
213 | #endif |
214 | ||
1df5f7c1 | 215 | gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0; |
12816592 NC |
216 | /* XXX Ideally this cast would be replaced with a change to const char* |
217 | in the struct. */ | |
f4890806 | 218 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
219 | gp->gp_egv = gv; |
220 | gp->gp_refcnt = 1; | |
221 | ||
222 | return gp; | |
223 | } | |
224 | ||
463ee0b2 | 225 | void |
864dbfa3 | 226 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 | 227 | { |
27da23d5 | 228 | dVAR; |
3b6733bf NC |
229 | const U32 old_type = SvTYPE(gv); |
230 | const bool doproto = old_type > SVt_NULL; | |
024963f8 | 231 | char * const proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
49a54bbe | 232 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
756cb477 | 233 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 234 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 | 235 | |
7918f24d | 236 | PERL_ARGS_ASSERT_GV_INIT; |
756cb477 NC |
237 | assert (!(proto && has_constant)); |
238 | ||
239 | if (has_constant) { | |
5c1f4d79 NC |
240 | /* The constant has to be a simple scalar type. */ |
241 | switch (SvTYPE(has_constant)) { | |
242 | case SVt_PVAV: | |
243 | case SVt_PVHV: | |
244 | case SVt_PVCV: | |
245 | case SVt_PVFM: | |
246 | case SVt_PVIO: | |
247 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
248 | sv_reftype(has_constant, 0)); | |
42d0e0b7 | 249 | default: NOOP; |
5c1f4d79 | 250 | } |
756cb477 NC |
251 | SvRV_set(gv, NULL); |
252 | SvROK_off(gv); | |
253 | } | |
463ee0b2 | 254 | |
3b6733bf NC |
255 | |
256 | if (old_type < SVt_PVGV) { | |
257 | if (old_type >= SVt_PV) | |
258 | SvCUR_set(gv, 0); | |
259 | sv_upgrade((SV*)gv, SVt_PVGV); | |
260 | } | |
55d729e4 GS |
261 | if (SvLEN(gv)) { |
262 | if (proto) { | |
f880fe2f | 263 | SvPV_set(gv, NULL); |
b162af07 | 264 | SvLEN_set(gv, 0); |
55d729e4 GS |
265 | SvPOK_off(gv); |
266 | } else | |
94010e71 | 267 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 268 | } |
2e5b91de NC |
269 | SvIOK_off(gv); |
270 | isGV_with_GP_on(gv); | |
12816592 NC |
271 | |
272 | GvGP(gv) = Perl_newGP(aTHX_ gv); | |
e15faf7d NC |
273 | GvSTASH(gv) = stash; |
274 | if (stash) | |
275 | Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv); | |
ae8cc45f | 276 | gv_name_set(gv, name, len, GV_ADD); |
23ad5bf5 | 277 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 | 278 | GvMULTI_on(gv); |
55d729e4 GS |
279 | if (doproto) { /* Replicate part of newSUB here. */ |
280 | ENTER; | |
756cb477 NC |
281 | if (has_constant) { |
282 | /* newCONSTSUB takes ownership of the reference from us. */ | |
283 | GvCV(gv) = newCONSTSUB(stash, name, has_constant); | |
1ccdb730 NC |
284 | /* If this reference was a copy of another, then the subroutine |
285 | must have been "imported", by a Perl space assignment to a GV | |
286 | from a reference to CV. */ | |
287 | if (exported_constant) | |
288 | GvIMPORTED_CV_on(gv); | |
756cb477 | 289 | } else { |
756cb477 NC |
290 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
291 | GvCV(gv) = PL_compcv; | |
292 | } | |
55d729e4 GS |
293 | LEAVE; |
294 | ||
e1a479c5 | 295 | mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */ |
65c50114 | 296 | CvGV(GvCV(gv)) = gv; |
e0d088d0 | 297 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 | 298 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 | 299 | if (proto) { |
49a54bbe NC |
300 | sv_usepvn_flags((SV*)GvCV(gv), proto, protolen, |
301 | SV_HAS_TRAILING_NUL); | |
55d729e4 GS |
302 | } |
303 | } | |
463ee0b2 LW |
304 | } |
305 | ||
76e3520e | 306 | STATIC void |
fe9845cc | 307 | S_gv_init_sv(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 308 | { |
7918f24d NC |
309 | PERL_ARGS_ASSERT_GV_INIT_SV; |
310 | ||
a0d0e21e LW |
311 | switch (sv_type) { |
312 | case SVt_PVIO: | |
313 | (void)GvIOn(gv); | |
314 | break; | |
315 | case SVt_PVAV: | |
316 | (void)GvAVn(gv); | |
317 | break; | |
318 | case SVt_PVHV: | |
319 | (void)GvHVn(gv); | |
320 | break; | |
c69033f2 NC |
321 | #ifdef PERL_DONT_CREATE_GVSV |
322 | case SVt_NULL: | |
323 | case SVt_PVCV: | |
324 | case SVt_PVFM: | |
e654831b | 325 | case SVt_PVGV: |
c69033f2 NC |
326 | break; |
327 | default: | |
dbdce04c NC |
328 | if(GvSVn(gv)) { |
329 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
330 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
331 | its side effect */ | |
332 | } | |
c69033f2 | 333 | #endif |
a0d0e21e LW |
334 | } |
335 | } | |
336 | ||
954c1994 GS |
337 | /* |
338 | =for apidoc gv_fetchmeth | |
339 | ||
340 | Returns the glob with the given C<name> and a defined subroutine or | |
341 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
07766739 | 342 | accessible via @ISA and UNIVERSAL::. |
954c1994 GS |
343 | |
344 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
345 | side-effect creates a glob with the given C<name> in the given C<stash> | |
346 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 347 | up caching info for this glob. |
954c1994 GS |
348 | |
349 | This function grants C<"SUPER"> token as a postfix of the stash name. The | |
350 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not | |
4929bf7b | 351 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 352 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 353 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
354 | |
355 | =cut | |
356 | */ | |
357 | ||
e1a479c5 BB |
358 | /* NOTE: No support for tied ISA */ |
359 | ||
79072805 | 360 | GV * |
864dbfa3 | 361 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 | 362 | { |
97aff369 | 363 | dVAR; |
463ee0b2 | 364 | GV** gvp; |
e1a479c5 BB |
365 | AV* linear_av; |
366 | SV** linear_svp; | |
367 | SV* linear_sv; | |
368 | HV* cstash; | |
369 | GV* candidate = NULL; | |
370 | CV* cand_cv = NULL; | |
371 | CV* old_cv; | |
372 | GV* topgv = NULL; | |
bfcb3514 | 373 | const char *hvname; |
e1a479c5 BB |
374 | I32 create = (level >= 0) ? 1 : 0; |
375 | I32 items; | |
376 | STRLEN packlen; | |
377 | U32 topgen_cmp; | |
a0d0e21e | 378 | |
7918f24d NC |
379 | PERL_ARGS_ASSERT_GV_FETCHMETH; |
380 | ||
af09ea45 IK |
381 | /* UNIVERSAL methods should be callable without a stash */ |
382 | if (!stash) { | |
e1a479c5 | 383 | create = 0; /* probably appropriate */ |
da51bb9b | 384 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
385 | return 0; |
386 | } | |
387 | ||
e1a479c5 BB |
388 | assert(stash); |
389 | ||
bfcb3514 NC |
390 | hvname = HvNAME_get(stash); |
391 | if (!hvname) | |
e1a479c5 | 392 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 393 | |
e1a479c5 BB |
394 | assert(hvname); |
395 | assert(name); | |
463ee0b2 | 396 | |
bfcb3514 | 397 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a | 398 | |
dd69841b | 399 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 BB |
400 | |
401 | /* check locally for a real method or a cache entry */ | |
402 | gvp = (GV**)hv_fetch(stash, name, len, create); | |
403 | if(gvp) { | |
404 | topgv = *gvp; | |
405 | assert(topgv); | |
406 | if (SvTYPE(topgv) != SVt_PVGV) | |
407 | gv_init(topgv, stash, name, len, TRUE); | |
408 | if ((cand_cv = GvCV(topgv))) { | |
409 | /* If genuine method or valid cache entry, use it */ | |
410 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
411 | return topgv; | |
412 | } | |
413 | else { | |
414 | /* stale cache entry, junk it and move on */ | |
415 | SvREFCNT_dec(cand_cv); | |
416 | GvCV(topgv) = cand_cv = NULL; | |
417 | GvCVGEN(topgv) = 0; | |
418 | } | |
419 | } | |
420 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
421 | /* cache indicates no such method definitively */ | |
422 | return 0; | |
423 | } | |
463ee0b2 | 424 | } |
79072805 | 425 | |
e1a479c5 BB |
426 | packlen = HvNAMELEN_get(stash); |
427 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { | |
428 | HV* basestash; | |
429 | packlen -= 7; | |
430 | basestash = gv_stashpvn(hvname, packlen, GV_ADD); | |
431 | linear_av = mro_get_linear_isa(basestash); | |
9607fc9c | 432 | } |
e1a479c5 BB |
433 | else { |
434 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ | |
79072805 | 435 | } |
a0d0e21e | 436 | |
e1a479c5 BB |
437 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
438 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
439 | while (items--) { | |
440 | linear_sv = *linear_svp++; | |
441 | assert(linear_sv); | |
442 | cstash = gv_stashsv(linear_sv, 0); | |
443 | ||
dd69841b | 444 | if (!cstash) { |
b0c482e3 RGS |
445 | if (ckWARN(WARN_SYNTAX)) |
446 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA", | |
e1a479c5 BB |
447 | SVfARG(linear_sv), hvname); |
448 | continue; | |
449 | } | |
9607fc9c | 450 | |
e1a479c5 BB |
451 | assert(cstash); |
452 | ||
453 | gvp = (GV**)hv_fetch(cstash, name, len, 0); | |
454 | if (!gvp) continue; | |
455 | candidate = *gvp; | |
456 | assert(candidate); | |
457 | if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE); | |
458 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { | |
459 | /* | |
460 | * Found real method, cache method in topgv if: | |
461 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
462 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
463 | */ | |
464 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
465 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); | |
466 | SvREFCNT_inc_simple_void_NN(cand_cv); | |
467 | GvCV(topgv) = cand_cv; | |
468 | GvCVGEN(topgv) = topgen_cmp; | |
469 | } | |
470 | return candidate; | |
471 | } | |
472 | } | |
9607fc9c | 473 | |
e1a479c5 BB |
474 | /* Check UNIVERSAL without caching */ |
475 | if(level == 0 || level == -1) { | |
476 | candidate = gv_fetchmeth(NULL, name, len, 1); | |
477 | if(candidate) { | |
478 | cand_cv = GvCV(candidate); | |
479 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
480 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); | |
481 | SvREFCNT_inc_simple_void_NN(cand_cv); | |
482 | GvCV(topgv) = cand_cv; | |
483 | GvCVGEN(topgv) = topgen_cmp; | |
484 | } | |
485 | return candidate; | |
486 | } | |
487 | } | |
488 | ||
489 | if (topgv && GvREFCNT(topgv) == 1) { | |
490 | /* cache the fact that the method is not defined */ | |
491 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
492 | } |
493 | ||
79072805 LW |
494 | return 0; |
495 | } | |
496 | ||
954c1994 | 497 | /* |
611c1e95 IZ |
498 | =for apidoc gv_fetchmeth_autoload |
499 | ||
500 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. | |
501 | Returns a glob for the subroutine. | |
502 | ||
503 | For an autoloaded subroutine without a GV, will create a GV even | |
504 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() | |
505 | of the result may be zero. | |
506 | ||
507 | =cut | |
508 | */ | |
509 | ||
510 | GV * | |
511 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) | |
512 | { | |
513 | GV *gv = gv_fetchmeth(stash, name, len, level); | |
514 | ||
7918f24d NC |
515 | PERL_ARGS_ASSERT_GV_FETCHMETH_AUTOLOAD; |
516 | ||
611c1e95 | 517 | if (!gv) { |
611c1e95 IZ |
518 | CV *cv; |
519 | GV **gvp; | |
520 | ||
521 | if (!stash) | |
6136c704 | 522 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b | 523 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 | 524 | return NULL; |
5c7983e5 | 525 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 | 526 | return NULL; |
611c1e95 IZ |
527 | cv = GvCV(gv); |
528 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 529 | return NULL; |
611c1e95 IZ |
530 | /* Have an autoload */ |
531 | if (level < 0) /* Cannot do without a stub */ | |
532 | gv_fetchmeth(stash, name, len, 0); | |
533 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
534 | if (!gvp) | |
6136c704 | 535 | return NULL; |
611c1e95 IZ |
536 | return *gvp; |
537 | } | |
538 | return gv; | |
539 | } | |
540 | ||
541 | /* | |
954c1994 GS |
542 | =for apidoc gv_fetchmethod_autoload |
543 | ||
544 | Returns the glob which contains the subroutine to call to invoke the method | |
545 | on the C<stash>. In fact in the presence of autoloading this may be the | |
546 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is | |
b267980d | 547 | already setup. |
954c1994 GS |
548 | |
549 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
550 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 551 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 552 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 553 | with a non-zero C<autoload> parameter. |
954c1994 GS |
554 | |
555 | These functions grant C<"SUPER"> token as a prefix of the method name. Note | |
556 | that if you want to keep the returned glob for a long time, you need to | |
557 | check for it being "AUTOLOAD", since at the later time the call may load a | |
558 | different subroutine due to $AUTOLOAD changing its value. Use the glob | |
b267980d | 559 | created via a side effect to do this. |
954c1994 GS |
560 | |
561 | These functions have the same side-effects and as C<gv_fetchmeth> with | |
562 | C<level==0>. C<name> should be writable if contains C<':'> or C<' | |
563 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to | |
b267980d | 564 | C<call_sv> apply equally to these functions. |
954c1994 GS |
565 | |
566 | =cut | |
567 | */ | |
568 | ||
7d3b1f61 BB |
569 | STATIC HV* |
570 | S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen) | |
571 | { | |
572 | AV* superisa; | |
573 | GV** gvp; | |
574 | GV* gv; | |
575 | HV* stash; | |
576 | ||
7918f24d NC |
577 | PERL_ARGS_ASSERT_GV_GET_SUPER_PKG; |
578 | ||
7d3b1f61 BB |
579 | stash = gv_stashpvn(name, namelen, 0); |
580 | if(stash) return stash; | |
581 | ||
582 | /* If we must create it, give it an @ISA array containing | |
583 | the real package this SUPER is for, so that it's tied | |
584 | into the cache invalidation code correctly */ | |
585 | stash = gv_stashpvn(name, namelen, GV_ADD); | |
586 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); | |
587 | gv = *gvp; | |
588 | gv_init(gv, stash, "ISA", 3, TRUE); | |
589 | superisa = GvAVn(gv); | |
590 | GvMULTI_on(gv); | |
591 | sv_magic((SV*)superisa, (SV*)gv, PERL_MAGIC_isa, NULL, 0); | |
8e3a4a30 | 592 | #ifdef USE_ITHREADS |
7d3b1f61 | 593 | av_push(superisa, newSVpv(CopSTASHPV(PL_curcop), 0)); |
8e3a4a30 NC |
594 | #else |
595 | av_push(superisa, newSVhek(CopSTASH(PL_curcop) | |
596 | ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL)); | |
597 | #endif | |
7d3b1f61 BB |
598 | |
599 | return stash; | |
600 | } | |
601 | ||
dc848c6f | 602 | GV * |
864dbfa3 | 603 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 604 | { |
547bb267 NC |
605 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
606 | ||
256d1bb2 NC |
607 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
608 | } | |
609 | ||
610 | /* Don't merge this yet, as it's likely to get a len parameter, and possibly | |
611 | even a U32 hash */ | |
612 | GV * | |
613 | Perl_gv_fetchmethod_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
614 | { | |
97aff369 | 615 | dVAR; |
08105a92 | 616 | register const char *nend; |
c445ea15 | 617 | const char *nsplit = NULL; |
a0d0e21e | 618 | GV* gv; |
0dae17bd | 619 | HV* ostash = stash; |
c94593d0 | 620 | const char * const origname = name; |
256d1bb2 NC |
621 | SV *const error_report = (SV *)stash; |
622 | const U32 autoload = flags & GV_AUTOLOAD; | |
623 | const U32 do_croak = flags & GV_CROAK; | |
0dae17bd | 624 | |
547bb267 | 625 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_FLAGS; |
7918f24d | 626 | |
eff494dd | 627 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 | 628 | stash = NULL; |
c9bf4021 NC |
629 | else { |
630 | /* The only way stash can become NULL later on is if nsplit is set, | |
631 | which in turn means that there is no need for a SVt_PVHV case | |
632 | the error reporting code. */ | |
633 | } | |
b267980d | 634 | |
463ee0b2 | 635 | for (nend = name; *nend; nend++) { |
c94593d0 | 636 | if (*nend == '\'') { |
a0d0e21e | 637 | nsplit = nend; |
c94593d0 NC |
638 | name = nend + 1; |
639 | } | |
640 | else if (*nend == ':' && *(nend + 1) == ':') { | |
641 | nsplit = nend++; | |
642 | name = nend + 1; | |
643 | } | |
a0d0e21e LW |
644 | } |
645 | if (nsplit) { | |
7edbdc6b | 646 | if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) { |
9607fc9c | 647 | /* ->SUPER::method should really be looked up in original stash */ |
b37c2d43 | 648 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 | 649 | CopSTASHPV(PL_curcop))); |
af09ea45 | 650 | /* __PACKAGE__::SUPER stash should be autovivified */ |
7d3b1f61 | 651 | stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr)); |
cea2e8a9 | 652 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 | 653 | origname, HvNAME_get(stash), name) ); |
4633a7c4 | 654 | } |
e189a56d | 655 | else { |
af09ea45 | 656 | /* don't autovifify if ->NoSuchStash::method */ |
da51bb9b | 657 | stash = gv_stashpvn(origname, nsplit - origname, 0); |
e189a56d IK |
658 | |
659 | /* however, explicit calls to Pkg::SUPER::method may | |
660 | happen, and may require autovivification to work */ | |
661 | if (!stash && (nsplit - origname) >= 7 && | |
662 | strnEQ(nsplit - 7, "::SUPER", 7) && | |
da51bb9b | 663 | gv_stashpvn(origname, nsplit - origname - 7, 0)) |
7d3b1f61 | 664 | stash = gv_get_super_pkg(origname, nsplit - origname); |
e189a56d | 665 | } |
0dae17bd | 666 | ostash = stash; |
4633a7c4 LW |
667 | } |
668 | ||
9607fc9c | 669 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 670 | if (!gv) { |
2f6e0fe7 | 671 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 | 672 | gv = (GV*)&PL_sv_yes; |
dc848c6f | 673 | else if (autoload) |
0dae17bd | 674 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
256d1bb2 NC |
675 | if (!gv && do_croak) { |
676 | /* Right now this is exclusively for the benefit of S_method_common | |
677 | in pp_hot.c */ | |
678 | if (stash) { | |
679 | Perl_croak(aTHX_ | |
680 | "Can't locate object method \"%s\" via package \"%.*s\"", | |
c49b597d | 681 | name, (int)HvNAMELEN_get(stash), HvNAME_get(stash)); |
256d1bb2 NC |
682 | } |
683 | else { | |
684 | STRLEN packlen; | |
685 | const char *packname; | |
686 | ||
256d1bb2 NC |
687 | if (nsplit) { |
688 | packlen = nsplit - origname; | |
689 | packname = origname; | |
256d1bb2 NC |
690 | } else { |
691 | packname = SvPV_const(error_report, packlen); | |
692 | } | |
693 | ||
694 | Perl_croak(aTHX_ | |
695 | "Can't locate object method \"%s\" via package \"%.*s\"" | |
696 | " (perhaps you forgot to load \"%.*s\"?)", | |
697 | name, (int)packlen, packname, (int)packlen, packname); | |
698 | } | |
699 | } | |
463ee0b2 | 700 | } |
dc848c6f | 701 | else if (autoload) { |
9d4ba2ae | 702 | CV* const cv = GvCV(gv); |
09280a33 CS |
703 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
704 | GV* stubgv; | |
705 | GV* autogv; | |
706 | ||
707 | if (CvANON(cv)) | |
708 | stubgv = gv; | |
709 | else { | |
710 | stubgv = CvGV(cv); | |
711 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
712 | stubgv = gv; | |
713 | } | |
714 | autogv = gv_autoload4(GvSTASH(stubgv), | |
715 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 716 | if (autogv) |
717 | gv = autogv; | |
718 | } | |
719 | } | |
44a8e56a | 720 | |
721 | return gv; | |
722 | } | |
723 | ||
724 | GV* | |
864dbfa3 | 725 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a | 726 | { |
27da23d5 | 727 | dVAR; |
44a8e56a | 728 | GV* gv; |
729 | CV* cv; | |
730 | HV* varstash; | |
731 | GV* vargv; | |
732 | SV* varsv; | |
e1ec3a88 | 733 | const char *packname = ""; |
eae70eaa | 734 | STRLEN packname_len = 0; |
44a8e56a | 735 | |
7918f24d NC |
736 | PERL_ARGS_ASSERT_GV_AUTOLOAD4; |
737 | ||
7edbdc6b | 738 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c | 739 | return NULL; |
0dae17bd GS |
740 | if (stash) { |
741 | if (SvTYPE(stash) < SVt_PVHV) { | |
e62f0680 | 742 | packname = SvPV_const((SV*)stash, packname_len); |
5c284bb0 | 743 | stash = NULL; |
0dae17bd GS |
744 | } |
745 | else { | |
bfcb3514 | 746 | packname = HvNAME_get(stash); |
7423f6db | 747 | packname_len = HvNAMELEN_get(stash); |
0dae17bd GS |
748 | } |
749 | } | |
5c7983e5 | 750 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c | 751 | return NULL; |
dc848c6f | 752 | cv = GvCV(gv); |
753 | ||
adb5a9ae | 754 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 755 | return NULL; |
ed850460 | 756 | |
dc848c6f | 757 | /* |
758 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
759 | */ | |
041457d9 DM |
760 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
761 | && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) | |
762 | ) | |
12bcd1a6 | 763 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f | 764 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd | 765 | packname, (int)len, name); |
44a8e56a | 766 | |
aed2304a | 767 | if (CvISXSUB(cv)) { |
adb5a9ae DM |
768 | /* rather than lookup/init $AUTOLOAD here |
769 | * only to have the XSUB do another lookup for $AUTOLOAD | |
770 | * and split that value on the last '::', | |
771 | * pass along the same data via some unused fields in the CV | |
772 | */ | |
773 | CvSTASH(cv) = stash; | |
f880fe2f | 774 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 | 775 | SvCUR_set(cv, len); |
adb5a9ae DM |
776 | return gv; |
777 | } | |
adb5a9ae | 778 | |
44a8e56a | 779 | /* |
780 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
781 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
782 | * use that, but for lack of anything better we will use the sub's | |
783 | * original package to look up $AUTOLOAD. | |
784 | */ | |
785 | varstash = GvSTASH(CvGV(cv)); | |
5c7983e5 | 786 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
787 | ENTER; |
788 | ||
c69033f2 | 789 | if (!isGV(vargv)) { |
5c7983e5 | 790 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 | 791 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 792 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
793 | #endif |
794 | } | |
3d35f11b | 795 | LEAVE; |
e203899d | 796 | varsv = GvSVn(vargv); |
7423f6db | 797 | sv_setpvn(varsv, packname, packname_len); |
396482e1 | 798 | sv_catpvs(varsv, "::"); |
44a8e56a | 799 | sv_catpvn(varsv, name, len); |
a0d0e21e LW |
800 | return gv; |
801 | } | |
802 | ||
44a2ac75 YO |
803 | |
804 | /* require_tie_mod() internal routine for requiring a module | |
805 | * that implements the logic of automatical ties like %! and %- | |
806 | * | |
807 | * The "gv" parameter should be the glob. | |
45cbc99a RGS |
808 | * "varpv" holds the name of the var, used for error messages. |
809 | * "namesv" holds the module name. Its refcount will be decremented. | |
44a2ac75 | 810 | * "methpv" holds the method name to test for to check that things |
45cbc99a RGS |
811 | * are working reasonably close to as expected. |
812 | * "flags": if flag & 1 then save the scalar before loading. | |
44a2ac75 YO |
813 | * For the protection of $! to work (it is set by this routine) |
814 | * the sv slot must already be magicalized. | |
d2c93421 | 815 | */ |
44a2ac75 YO |
816 | STATIC HV* |
817 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) | |
d2c93421 | 818 | { |
27da23d5 | 819 | dVAR; |
da51bb9b | 820 | HV* stash = gv_stashsv(namesv, 0); |
45cbc99a | 821 | |
7918f24d NC |
822 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
823 | ||
44a2ac75 | 824 | if (!stash || !(gv_fetchmethod(stash, methpv))) { |
45cbc99a RGS |
825 | SV *module = newSVsv(namesv); |
826 | char varname = *varpv; /* varpv might be clobbered by load_module, | |
827 | so save it. For the moment it's always | |
828 | a single char. */ | |
d2c93421 | 829 | dSP; |
d2c93421 | 830 | ENTER; |
44a2ac75 | 831 | if ( flags & 1 ) |
45cbc99a | 832 | save_scalar(gv); |
cac54379 | 833 | PUSHSTACKi(PERLSI_MAGIC); |
45cbc99a | 834 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
cac54379 | 835 | POPSTACK; |
d2c93421 RH |
836 | LEAVE; |
837 | SPAGAIN; | |
da51bb9b | 838 | stash = gv_stashsv(namesv, 0); |
44a2ac75 | 839 | if (!stash) |
45cbc99a RGS |
840 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available", |
841 | varname, SVfARG(namesv)); | |
842 | else if (!gv_fetchmethod(stash, methpv)) | |
843 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s", | |
844 | varname, SVfARG(namesv), methpv); | |
d2c93421 | 845 | } |
45cbc99a | 846 | SvREFCNT_dec(namesv); |
44a2ac75 | 847 | return stash; |
d2c93421 RH |
848 | } |
849 | ||
954c1994 GS |
850 | /* |
851 | =for apidoc gv_stashpv | |
852 | ||
da51bb9b | 853 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 854 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
855 | |
856 | =cut | |
857 | */ | |
858 | ||
a0d0e21e | 859 | HV* |
864dbfa3 | 860 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 861 | { |
7918f24d | 862 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 863 | return gv_stashpvn(name, strlen(name), create); |
864 | } | |
865 | ||
bc96cb06 SH |
866 | /* |
867 | =for apidoc gv_stashpvn | |
868 | ||
da51bb9b NC |
869 | Returns a pointer to the stash for a specified package. The C<namelen> |
870 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
871 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
872 | created if it does not already exist. If the package does not exist and | |
873 | C<flags> is 0 (or any other setting that does not create packages) then NULL | |
874 | is returned. | |
875 | ||
bc96cb06 SH |
876 | |
877 | =cut | |
878 | */ | |
879 | ||
dc437b57 | 880 | HV* |
da51bb9b | 881 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 882 | { |
0cea0058 | 883 | char smallbuf[128]; |
46fc3d4c | 884 | char *tmpbuf; |
a0d0e21e LW |
885 | HV *stash; |
886 | GV *tmpgv; | |
dc437b57 | 887 | |
7918f24d NC |
888 | PERL_ARGS_ASSERT_GV_STASHPVN; |
889 | ||
798b63bc | 890 | if (namelen + 2 <= sizeof smallbuf) |
46fc3d4c | 891 | tmpbuf = smallbuf; |
892 | else | |
2ae0db35 | 893 | Newx(tmpbuf, namelen + 2, char); |
dc437b57 | 894 | Copy(name,tmpbuf,namelen,char); |
895 | tmpbuf[namelen++] = ':'; | |
896 | tmpbuf[namelen++] = ':'; | |
da51bb9b | 897 | tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, flags, SVt_PVHV); |
46fc3d4c | 898 | if (tmpbuf != smallbuf) |
899 | Safefree(tmpbuf); | |
a0d0e21e | 900 | if (!tmpgv) |
da51bb9b | 901 | return NULL; |
a0d0e21e LW |
902 | if (!GvHV(tmpgv)) |
903 | GvHV(tmpgv) = newHV(); | |
904 | stash = GvHV(tmpgv); | |
bfcb3514 | 905 | if (!HvNAME_get(stash)) |
51a37f80 | 906 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e | 907 | return stash; |
463ee0b2 LW |
908 | } |
909 | ||
954c1994 GS |
910 | /* |
911 | =for apidoc gv_stashsv | |
912 | ||
da51bb9b | 913 | Returns a pointer to the stash for a specified package. See C<gv_stashpvn>. |
954c1994 GS |
914 | |
915 | =cut | |
916 | */ | |
917 | ||
a0d0e21e | 918 | HV* |
da51bb9b | 919 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 920 | { |
dc437b57 | 921 | STRLEN len; |
9d4ba2ae | 922 | const char * const ptr = SvPV_const(sv,len); |
7918f24d NC |
923 | |
924 | PERL_ARGS_ASSERT_GV_STASHSV; | |
925 | ||
da51bb9b | 926 | return gv_stashpvn(ptr, len, flags); |
a0d0e21e LW |
927 | } |
928 | ||
929 | ||
463ee0b2 | 930 | GV * |
fe9845cc | 931 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) { |
7918f24d | 932 | PERL_ARGS_ASSERT_GV_FETCHPV; |
b7787f18 | 933 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
934 | } |
935 | ||
936 | GV * | |
fe9845cc | 937 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 938 | STRLEN len; |
9d4ba2ae | 939 | const char * const nambeg = SvPV_const(name, len); |
7918f24d | 940 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
941 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
942 | } | |
943 | ||
944 | GV * | |
945 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
fe9845cc | 946 | const svtype sv_type) |
79072805 | 947 | { |
97aff369 | 948 | dVAR; |
08105a92 | 949 | register const char *name = nambeg; |
c445ea15 | 950 | register GV *gv = NULL; |
79072805 | 951 | GV**gvp; |
79072805 | 952 | I32 len; |
b3d904f3 | 953 | register const char *name_cursor; |
c445ea15 | 954 | HV *stash = NULL; |
add2581e | 955 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a | 956 | const I32 no_expand = flags & GV_NOEXPAND; |
780a5241 | 957 | const I32 add = flags & ~GV_NOADD_MASK; |
b3d904f3 NC |
958 | const char *const name_end = nambeg + full_len; |
959 | const char *const name_em1 = name_end - 1; | |
5e0caaeb | 960 | U32 faking_it; |
79072805 | 961 | |
7918f24d NC |
962 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; |
963 | ||
fafc274c NC |
964 | if (flags & GV_NOTQUAL) { |
965 | /* Caller promised that there is no stash, so we can skip the check. */ | |
966 | len = full_len; | |
967 | goto no_stash; | |
968 | } | |
969 | ||
b208e10c NC |
970 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
971 | /* accidental stringify on a GV? */ | |
c07a80fd | 972 | name++; |
b208e10c | 973 | } |
c07a80fd | 974 | |
b3d904f3 NC |
975 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
976 | if ((*name_cursor == ':' && name_cursor < name_em1 | |
977 | && name_cursor[1] == ':') | |
978 | || (*name_cursor == '\'' && name_cursor[1])) | |
463ee0b2 | 979 | { |
463ee0b2 | 980 | if (!stash) |
3280af22 | 981 | stash = PL_defstash; |
dc437b57 | 982 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c | 983 | return NULL; |
463ee0b2 | 984 | |
b3d904f3 | 985 | len = name_cursor - name; |
85e6fe83 | 986 | if (len > 0) { |
0cea0058 | 987 | char smallbuf[128]; |
62b57502 | 988 | char *tmpbuf; |
62b57502 | 989 | |
798b63bc | 990 | if (len + 2 <= (I32)sizeof (smallbuf)) |
3c78fafa | 991 | tmpbuf = smallbuf; |
62b57502 | 992 | else |
2ae0db35 | 993 | Newx(tmpbuf, len+2, char); |
a0d0e21e LW |
994 | Copy(name, tmpbuf, len, char); |
995 | tmpbuf[len++] = ':'; | |
996 | tmpbuf[len++] = ':'; | |
463ee0b2 | 997 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
a0714e2c | 998 | gv = gvp ? *gvp : NULL; |
3280af22 | 999 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 | 1000 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 | 1001 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 GS |
1002 | else |
1003 | GvMULTI_on(gv); | |
1004 | } | |
3c78fafa | 1005 | if (tmpbuf != smallbuf) |
62b57502 | 1006 | Safefree(tmpbuf); |
3280af22 | 1007 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0714e2c | 1008 | return NULL; |
85e6fe83 | 1009 | |
463ee0b2 LW |
1010 | if (!(stash = GvHV(gv))) |
1011 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 1012 | |
bfcb3514 | 1013 | if (!HvNAME_get(stash)) |
b3d904f3 | 1014 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); |
463ee0b2 LW |
1015 | } |
1016 | ||
b3d904f3 NC |
1017 | if (*name_cursor == ':') |
1018 | name_cursor++; | |
1019 | name_cursor++; | |
1020 | name = name_cursor; | |
ad6bfa9d | 1021 | if (name == name_end) |
017a3ce5 | 1022 | return gv ? gv : (GV*)*hv_fetchs(PL_defstash, "main::", TRUE); |
79072805 | 1023 | } |
79072805 | 1024 | } |
b3d904f3 | 1025 | len = name_cursor - name; |
463ee0b2 LW |
1026 | |
1027 | /* No stash in name, so see how we can default */ | |
1028 | ||
1029 | if (!stash) { | |
fafc274c | 1030 | no_stash: |
8ccce9ae | 1031 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c | 1032 | bool global = FALSE; |
1033 | ||
8ccce9ae NC |
1034 | switch (len) { |
1035 | case 1: | |
18ea00d7 | 1036 | if (*name == '_') |
9d116dd7 | 1037 | global = TRUE; |
18ea00d7 | 1038 | break; |
8ccce9ae NC |
1039 | case 3: |
1040 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1041 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1042 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
9d116dd7 | 1043 | global = TRUE; |
18ea00d7 | 1044 | break; |
8ccce9ae NC |
1045 | case 4: |
1046 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1047 | && name[3] == 'V') | |
9d116dd7 | 1048 | global = TRUE; |
18ea00d7 | 1049 | break; |
8ccce9ae NC |
1050 | case 5: |
1051 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1052 | && name[3] == 'I' && name[4] == 'N') | |
463ee0b2 | 1053 | global = TRUE; |
18ea00d7 | 1054 | break; |
8ccce9ae NC |
1055 | case 6: |
1056 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1057 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1058 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
1059 | global = TRUE; | |
1060 | break; | |
1061 | case 7: | |
1062 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1063 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1064 | && name[6] == 'T') | |
18ea00d7 NC |
1065 | global = TRUE; |
1066 | break; | |
463ee0b2 | 1067 | } |
9607fc9c | 1068 | |
463ee0b2 | 1069 | if (global) |
3280af22 | 1070 | stash = PL_defstash; |
923e4eb5 | 1071 | else if (IN_PERL_COMPILETIME) { |
3280af22 NIS |
1072 | stash = PL_curstash; |
1073 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
748a9306 LW |
1074 | sv_type != SVt_PVCV && |
1075 | sv_type != SVt_PVGV && | |
4633a7c4 | 1076 | sv_type != SVt_PVFM && |
c07a80fd | 1077 | sv_type != SVt_PVIO && |
70ec6265 NC |
1078 | !(len == 1 && sv_type == SVt_PV && |
1079 | (*name == 'a' || *name == 'b')) ) | |
748a9306 | 1080 | { |
4633a7c4 LW |
1081 | gvp = (GV**)hv_fetch(stash,name,len,0); |
1082 | if (!gvp || | |
3280af22 | 1083 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 AD |
1084 | SvTYPE(*gvp) != SVt_PVGV) |
1085 | { | |
d4c19fe8 | 1086 | stash = NULL; |
a5f75d66 | 1087 | } |
155aba94 GS |
1088 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
1089 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1090 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
4633a7c4 | 1091 | { |
cea2e8a9 | 1092 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 LW |
1093 | sv_type == SVt_PVAV ? '@' : |
1094 | sv_type == SVt_PVHV ? '%' : '$', | |
1095 | name); | |
8ebc5c01 | 1096 | if (GvCVu(*gvp)) |
cc507455 | 1097 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
d4c19fe8 | 1098 | stash = NULL; |
4633a7c4 | 1099 | } |
a0d0e21e | 1100 | } |
85e6fe83 | 1101 | } |
463ee0b2 | 1102 | else |
1d7c1841 | 1103 | stash = CopSTASH(PL_curcop); |
463ee0b2 LW |
1104 | } |
1105 | else | |
3280af22 | 1106 | stash = PL_defstash; |
463ee0b2 LW |
1107 | } |
1108 | ||
1109 | /* By this point we should have a stash and a name */ | |
1110 | ||
a0d0e21e | 1111 | if (!stash) { |
5a844595 | 1112 | if (add) { |
9d4ba2ae | 1113 | SV * const err = Perl_mess(aTHX_ |
5a844595 GS |
1114 | "Global symbol \"%s%s\" requires explicit package name", |
1115 | (sv_type == SVt_PV ? "$" | |
1116 | : sv_type == SVt_PVAV ? "@" | |
1117 | : sv_type == SVt_PVHV ? "%" | |
608b3986 | 1118 | : ""), name); |
e7f343b6 | 1119 | GV *gv; |
608b3986 AE |
1120 | if (USE_UTF8_IN_NAMES) |
1121 | SvUTF8_on(err); | |
1122 | qerror(err); | |
e7f343b6 NC |
1123 | gv = gv_fetchpvn_flags("<none>::", 8, GV_ADDMULTI, SVt_PVHV); |
1124 | if(!gv) { | |
1125 | /* symbol table under destruction */ | |
1126 | return NULL; | |
1127 | } | |
1128 | stash = GvHV(gv); | |
a0d0e21e | 1129 | } |
d7aacf4e | 1130 | else |
a0714e2c | 1131 | return NULL; |
a0d0e21e LW |
1132 | } |
1133 | ||
1134 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
a0714e2c | 1135 | return NULL; |
a0d0e21e | 1136 | |
79072805 | 1137 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 | 1138 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
a0714e2c | 1139 | return NULL; |
79072805 LW |
1140 | gv = *gvp; |
1141 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e | 1142 | if (add) { |
a5f75d66 | 1143 | GvMULTI_on(gv); |
a0d0e21e | 1144 | gv_init_sv(gv, sv_type); |
45cbc99a | 1145 | if (len == 1 && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) { |
44a2ac75 YO |
1146 | if (*name == '!') |
1147 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); | |
45cbc99a | 1148 | else if (*name == '-' || *name == '+') |
192b9cd1 | 1149 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
45cbc99a | 1150 | } |
a0d0e21e | 1151 | } |
79072805 | 1152 | return gv; |
add2581e | 1153 | } else if (no_init) { |
55d729e4 | 1154 | return gv; |
e26df76a NC |
1155 | } else if (no_expand && SvROK(gv)) { |
1156 | return gv; | |
79072805 | 1157 | } |
93a17b20 | 1158 | |
5e0caaeb NC |
1159 | /* Adding a new symbol. |
1160 | Unless of course there was already something non-GV here, in which case | |
1161 | we want to behave as if there was always a GV here, containing some sort | |
1162 | of subroutine. | |
1163 | Otherwise we run the risk of creating things like GvIO, which can cause | |
1164 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
1165 | ||
1166 | faking_it = SvOK(gv); | |
93a17b20 | 1167 | |
0453d815 | 1168 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d | 1169 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 | 1170 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
5e0caaeb | 1171 | gv_init_sv(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 | 1172 | |
a0288114 | 1173 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d | 1174 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 PM |
1175 | GvMULTI_on(gv) ; |
1176 | ||
93a17b20 | 1177 | /* set up magic where warranted */ |
cc4c2da6 | 1178 | if (len > 1) { |
9431620d | 1179 | #ifndef EBCDIC |
cc4c2da6 | 1180 | if (*name > 'V' ) { |
6f207bd3 | 1181 | NOOP; |
cc4c2da6 | 1182 | /* Nothing else to do. |
91f565cb | 1183 | The compiler will probably turn the switch statement into a |
cc4c2da6 NC |
1184 | branch table. Make sure we avoid even that small overhead for |
1185 | the common case of lower case variable names. */ | |
9431620d NC |
1186 | } else |
1187 | #endif | |
1188 | { | |
b464bac0 | 1189 | const char * const name2 = name + 1; |
cc4c2da6 NC |
1190 | switch (*name) { |
1191 | case 'A': | |
1192 | if (strEQ(name2, "RGV")) { | |
1193 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
1194 | } | |
7b8203e3 YST |
1195 | else if (strEQ(name2, "RGVOUT")) { |
1196 | GvMULTI_on(gv); | |
1197 | } | |
cc4c2da6 NC |
1198 | break; |
1199 | case 'E': | |
1200 | if (strnEQ(name2, "XPORT", 5)) | |
1201 | GvMULTI_on(gv); | |
1202 | break; | |
1203 | case 'I': | |
1204 | if (strEQ(name2, "SA")) { | |
9d4ba2ae | 1205 | AV* const av = GvAVn(gv); |
cc4c2da6 | 1206 | GvMULTI_on(gv); |
bd61b366 | 1207 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, NULL, 0); |
cc4c2da6 NC |
1208 | /* NOTE: No support for tied ISA */ |
1209 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") | |
1210 | && AvFILLp(av) == -1) | |
1211 | { | |
e1ec3a88 | 1212 | const char *pname; |
cc4c2da6 | 1213 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
da51bb9b | 1214 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 | 1215 | av_push(av, newSVpvn(pname = "DB_File",7)); |
da51bb9b | 1216 | gv_stashpvn(pname, 7, GV_ADD); |
cc4c2da6 | 1217 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
da51bb9b | 1218 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 | 1219 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
da51bb9b | 1220 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 | 1221 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
da51bb9b | 1222 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 NC |
1223 | } |
1224 | } | |
1225 | break; | |
1226 | case 'O': | |
1227 | if (strEQ(name2, "VERLOAD")) { | |
9d4ba2ae | 1228 | HV* const hv = GvHVn(gv); |
cc4c2da6 | 1229 | GvMULTI_on(gv); |
a0714e2c | 1230 | hv_magic(hv, NULL, PERL_MAGIC_overload); |
cc4c2da6 NC |
1231 | } |
1232 | break; | |
1233 | case 'S': | |
1234 | if (strEQ(name2, "IG")) { | |
1235 | HV *hv; | |
1236 | I32 i; | |
1237 | if (!PL_psig_ptr) { | |
a02a5408 JC |
1238 | Newxz(PL_psig_ptr, SIG_SIZE, SV*); |
1239 | Newxz(PL_psig_name, SIG_SIZE, SV*); | |
1240 | Newxz(PL_psig_pend, SIG_SIZE, int); | |
cc4c2da6 NC |
1241 | } |
1242 | GvMULTI_on(gv); | |
1243 | hv = GvHVn(gv); | |
a0714e2c | 1244 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 1245 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 1246 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
1247 | if (init) |
1248 | sv_setsv(*init, &PL_sv_undef); | |
1249 | PL_psig_ptr[i] = 0; | |
1250 | PL_psig_name[i] = 0; | |
1251 | PL_psig_pend[i] = 0; | |
1252 | } | |
1253 | } | |
1254 | break; | |
1255 | case 'V': | |
1256 | if (strEQ(name2, "ERSION")) | |
1257 | GvMULTI_on(gv); | |
1258 | break; | |
e5218da5 GA |
1259 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1260 | if (strEQ(name2, "HILD_ERROR_NATIVE")) | |
1261 | goto magicalize; | |
1262 | break; | |
cc4c2da6 NC |
1263 | case '\005': /* $^ENCODING */ |
1264 | if (strEQ(name2, "NCODING")) | |
1265 | goto magicalize; | |
1266 | break; | |
cde0cee5 YO |
1267 | case '\015': /* $^MATCH */ |
1268 | if (strEQ(name2, "ATCH")) | |
2fdbfb4d | 1269 | goto magicalize; |
cc4c2da6 NC |
1270 | case '\017': /* $^OPEN */ |
1271 | if (strEQ(name2, "PEN")) | |
1272 | goto magicalize; | |
1273 | break; | |
cde0cee5 YO |
1274 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
1275 | if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH")) | |
2fdbfb4d | 1276 | goto magicalize; |
cc4c2da6 NC |
1277 | case '\024': /* ${^TAINT} */ |
1278 | if (strEQ(name2, "AINT")) | |
1279 | goto ro_magicalize; | |
1280 | break; | |
7cebcbc0 | 1281 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 | 1282 | if (strEQ(name2, "NICODE")) |
cc4c2da6 | 1283 | goto ro_magicalize; |
a0288114 | 1284 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 | 1285 | goto ro_magicalize; |
e07ea26a NC |
1286 | if (strEQ(name2, "TF8CACHE")) |
1287 | goto magicalize; | |
cc4c2da6 NC |
1288 | break; |
1289 | case '\027': /* $^WARNING_BITS */ | |
1290 | if (strEQ(name2, "ARNING_BITS")) | |
1291 | goto magicalize; | |
1292 | break; | |
1293 | case '1': | |
1294 | case '2': | |
1295 | case '3': | |
1296 | case '4': | |
1297 | case '5': | |
1298 | case '6': | |
1299 | case '7': | |
1300 | case '8': | |
1301 | case '9': | |
85e6fe83 | 1302 | { |
2fdbfb4d AB |
1303 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
1304 | this test */ | |
1305 | /* This snippet is taken from is_gv_magical */ | |
cc4c2da6 NC |
1306 | const char *end = name + len; |
1307 | while (--end > name) { | |
2fdbfb4d | 1308 | if (!isDIGIT(*end)) return gv; |
cc4c2da6 | 1309 | } |
2fdbfb4d | 1310 | goto magicalize; |
1d7c1841 | 1311 | } |
dc437b57 | 1312 | } |
93a17b20 | 1313 | } |
392db708 NC |
1314 | } else { |
1315 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
1316 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 NC |
1317 | switch (*name) { |
1318 | case '&': | |
1319 | case '`': | |
1320 | case '\'': | |
1321 | if ( | |
1322 | sv_type == SVt_PVAV || | |
1323 | sv_type == SVt_PVHV || | |
1324 | sv_type == SVt_PVCV || | |
1325 | sv_type == SVt_PVFM || | |
1326 | sv_type == SVt_PVIO | |
1327 | ) { break; } | |
1328 | PL_sawampersand = TRUE; | |
2fdbfb4d | 1329 | goto magicalize; |
cc4c2da6 NC |
1330 | |
1331 | case ':': | |
c69033f2 | 1332 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
1333 | goto magicalize; |
1334 | ||
1335 | case '?': | |
ff0cee69 | 1336 | #ifdef COMPLEX_STATUS |
c69033f2 | 1337 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 1338 | #endif |
cc4c2da6 | 1339 | goto magicalize; |
ff0cee69 | 1340 | |
cc4c2da6 | 1341 | case '!': |
67261566 | 1342 | GvMULTI_on(gv); |
44a2ac75 | 1343 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 1344 | |
c69033f2 | 1345 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 | 1346 | |
44a2ac75 | 1347 | /* magicalization must be done before require_tie_mod is called */ |
67261566 | 1348 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
44a2ac75 | 1349 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
d2c93421 | 1350 | |
6cef1e77 | 1351 | break; |
cc4c2da6 | 1352 | case '-': |
44a2ac75 YO |
1353 | case '+': |
1354 | GvMULTI_on(gv); /* no used once warnings here */ | |
1355 | { | |
44a2ac75 | 1356 | AV* const av = GvAVn(gv); |
67261566 | 1357 | SV* const avc = (*name == '+') ? (SV*)av : NULL; |
44a2ac75 | 1358 | |
67261566 | 1359 | sv_magic((SV*)av, avc, PERL_MAGIC_regdata, NULL, 0); |
44a2ac75 | 1360 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
67261566 | 1361 | if (avc) |
44a2ac75 | 1362 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 | 1363 | SvREADONLY_on(av); |
67261566 YO |
1364 | |
1365 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
192b9cd1 | 1366 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
67261566 | 1367 | |
80305961 | 1368 | break; |
cc4c2da6 NC |
1369 | } |
1370 | case '*': | |
cc4c2da6 | 1371 | case '#': |
fafcdf9e | 1372 | if (sv_type == SVt_PV && ckWARN2_d(WARN_DEPRECATED, WARN_SYNTAX)) |
cc4c2da6 | 1373 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
8ae1fe26 RGS |
1374 | "$%c is no longer supported", *name); |
1375 | break; | |
cc4c2da6 | 1376 | case '|': |
c69033f2 | 1377 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 NC |
1378 | goto magicalize; |
1379 | ||
b3ca2e83 NC |
1380 | case '\010': /* $^H */ |
1381 | { | |
1382 | HV *const hv = GvHVn(gv); | |
1383 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
1384 | } | |
1385 | goto magicalize; | |
cc4c2da6 | 1386 | case '\023': /* $^S */ |
2fdbfb4d AB |
1387 | ro_magicalize: |
1388 | SvREADONLY_on(GvSVn(gv)); | |
1389 | /* FALL THROUGH */ | |
cc4c2da6 NC |
1390 | case '1': |
1391 | case '2': | |
1392 | case '3': | |
1393 | case '4': | |
1394 | case '5': | |
1395 | case '6': | |
1396 | case '7': | |
1397 | case '8': | |
1398 | case '9': | |
cc4c2da6 NC |
1399 | case '[': |
1400 | case '^': | |
1401 | case '~': | |
1402 | case '=': | |
1403 | case '%': | |
1404 | case '.': | |
1405 | case '(': | |
1406 | case ')': | |
1407 | case '<': | |
1408 | case '>': | |
1409 | case ',': | |
1410 | case '\\': | |
1411 | case '/': | |
1412 | case '\001': /* $^A */ | |
1413 | case '\003': /* $^C */ | |
1414 | case '\004': /* $^D */ | |
1415 | case '\005': /* $^E */ | |
1416 | case '\006': /* $^F */ | |
cc4c2da6 NC |
1417 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1418 | case '\016': /* $^N */ | |
1419 | case '\017': /* $^O */ | |
1420 | case '\020': /* $^P */ | |
1421 | case '\024': /* $^T */ | |
1422 | case '\027': /* $^W */ | |
1423 | magicalize: | |
c69033f2 | 1424 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
cc4c2da6 | 1425 | break; |
e521374c | 1426 | |
cc4c2da6 | 1427 | case '\014': /* $^L */ |
c69033f2 NC |
1428 | sv_setpvn(GvSVn(gv),"\f",1); |
1429 | PL_formfeed = GvSVn(gv); | |
463ee0b2 | 1430 | break; |
cc4c2da6 | 1431 | case ';': |
c69033f2 | 1432 | sv_setpvn(GvSVn(gv),"\034",1); |
463ee0b2 | 1433 | break; |
cc4c2da6 NC |
1434 | case ']': |
1435 | { | |
c69033f2 | 1436 | SV * const sv = GvSVn(gv); |
d7aa5382 | 1437 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 1438 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
1439 | GvSV(gv) = vnumify(PL_patchlevel); |
1440 | SvREADONLY_on(GvSV(gv)); | |
1441 | SvREFCNT_dec(sv); | |
93a17b20 LW |
1442 | } |
1443 | break; | |
cc4c2da6 NC |
1444 | case '\026': /* $^V */ |
1445 | { | |
c69033f2 | 1446 | SV * const sv = GvSVn(gv); |
f9be5ac8 DM |
1447 | GvSV(gv) = new_version(PL_patchlevel); |
1448 | SvREADONLY_on(GvSV(gv)); | |
1449 | SvREFCNT_dec(sv); | |
16070b82 GS |
1450 | } |
1451 | break; | |
cc4c2da6 | 1452 | } |
79072805 | 1453 | } |
93a17b20 | 1454 | return gv; |
79072805 LW |
1455 | } |
1456 | ||
1457 | void | |
35a4481c | 1458 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1459 | { |
35a4481c | 1460 | const char *name; |
7423f6db | 1461 | STRLEN namelen; |
35a4481c | 1462 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
1463 | |
1464 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
1465 | ||
43693395 | 1466 | if (!hv) { |
0c34ef67 | 1467 | SvOK_off(sv); |
43693395 GS |
1468 | return; |
1469 | } | |
666ea192 | 1470 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 1471 | |
bfcb3514 | 1472 | name = HvNAME_get(hv); |
7423f6db NC |
1473 | if (name) { |
1474 | namelen = HvNAMELEN_get(hv); | |
1475 | } else { | |
e27ad1f2 | 1476 | name = "__ANON__"; |
7423f6db NC |
1477 | namelen = 8; |
1478 | } | |
a0288114 | 1479 | |
e27ad1f2 | 1480 | if (keepmain || strNE(name, "main")) { |
7423f6db | 1481 | sv_catpvn(sv,name,namelen); |
396482e1 | 1482 | sv_catpvs(sv,"::"); |
43693395 | 1483 | } |
257984c0 | 1484 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 GS |
1485 | } |
1486 | ||
1487 | void | |
35a4481c | 1488 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1489 | { |
46c461b5 | 1490 | const GV * const egv = GvEGV(gv); |
7918f24d NC |
1491 | |
1492 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
1493 | ||
46c461b5 | 1494 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
1495 | } |
1496 | ||
79072805 | 1497 | IO * |
864dbfa3 | 1498 | Perl_newIO(pTHX) |
79072805 | 1499 | { |
97aff369 | 1500 | dVAR; |
8990e307 | 1501 | GV *iogv; |
b9f83d2f | 1502 | IO * const io = (IO*)newSV_type(SVt_PVIO); |
158623e7 NC |
1503 | /* This used to read SvREFCNT(io) = 1; |
1504 | It's not clear why the reference count needed an explicit reset. NWC | |
1505 | */ | |
1506 | assert (SvREFCNT(io) == 1); | |
8990e307 | 1507 | SvOBJECT_on(io); |
b464bac0 | 1508 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 | 1509 | hv_clear(PL_stashcache); |
71315bf2 | 1510 | iogv = gv_fetchpvs("FileHandle::", 0, SVt_PVHV); |
5f2d631d GS |
1511 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1512 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) | |
71315bf2 | 1513 | iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV); |
b162af07 | 1514 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 LW |
1515 | return io; |
1516 | } | |
1517 | ||
1518 | void | |
1146e912 | 1519 | Perl_gv_check(pTHX_ const HV *stash) |
79072805 | 1520 | { |
97aff369 | 1521 | dVAR; |
79072805 | 1522 | register I32 i; |
463ee0b2 | 1523 | |
7918f24d NC |
1524 | PERL_ARGS_ASSERT_GV_CHECK; |
1525 | ||
8990e307 LW |
1526 | if (!HvARRAY(stash)) |
1527 | return; | |
a0d0e21e | 1528 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 1529 | const HE *entry; |
dc437b57 | 1530 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 AL |
1531 | register GV *gv; |
1532 | HV *hv; | |
dc437b57 | 1533 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f | 1534 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 1535 | { |
19b6c847 | 1536 | if (hv != PL_defstash && hv != stash) |
a0d0e21e LW |
1537 | gv_check(hv); /* nested package */ |
1538 | } | |
dc437b57 | 1539 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 | 1540 | const char *file; |
dc437b57 | 1541 | gv = (GV*)HeVAL(entry); |
55d729e4 | 1542 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 1543 | continue; |
1d7c1841 | 1544 | file = GvFILE(gv); |
1d7c1841 GS |
1545 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1546 | #ifdef USE_ITHREADS | |
dd374669 | 1547 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 | 1548 | #else |
9bde8eb0 NC |
1549 | CopFILEGV(PL_curcop) |
1550 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
1d7c1841 | 1551 | #endif |
9014280d | 1552 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 | 1553 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 | 1554 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 | 1555 | } |
79072805 LW |
1556 | } |
1557 | } | |
1558 | } | |
1559 | ||
1560 | GV * | |
e1ec3a88 | 1561 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 | 1562 | { |
97aff369 | 1563 | dVAR; |
7918f24d NC |
1564 | |
1565 | PERL_ARGS_ASSERT_NEWGVGEN; | |
1566 | ||
cea2e8a9 | 1567 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 | 1568 | GV_ADD, SVt_PVGV); |
79072805 LW |
1569 | } |
1570 | ||
1571 | /* hopefully this is only called on local symbol table entries */ | |
1572 | ||
1573 | GP* | |
864dbfa3 | 1574 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 1575 | { |
97aff369 | 1576 | dVAR; |
1d7c1841 | 1577 | if (!gp) |
d4c19fe8 | 1578 | return NULL; |
79072805 | 1579 | gp->gp_refcnt++; |
44a8e56a | 1580 | if (gp->gp_cv) { |
1581 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
1582 | /* If the GP they asked for a reference to contains |
1583 | a method cache entry, clear it first, so that we | |
1584 | don't infect them with our cached entry */ | |
44a8e56a | 1585 | SvREFCNT_dec(gp->gp_cv); |
601f1833 | 1586 | gp->gp_cv = NULL; |
44a8e56a | 1587 | gp->gp_cvgen = 0; |
1588 | } | |
44a8e56a | 1589 | } |
79072805 | 1590 | return gp; |
79072805 LW |
1591 | } |
1592 | ||
1593 | void | |
864dbfa3 | 1594 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 1595 | { |
97aff369 | 1596 | dVAR; |
79072805 LW |
1597 | GP* gp; |
1598 | ||
f7877b28 | 1599 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 1600 | return; |
f248d071 GS |
1601 | if (gp->gp_refcnt == 0) { |
1602 | if (ckWARN_d(WARN_INTERNAL)) | |
9014280d | 1603 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc SB |
1604 | "Attempt to free unreferenced glob pointers" |
1605 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
1606 | return; |
1607 | } | |
748a9306 LW |
1608 | if (--gp->gp_refcnt > 0) { |
1609 | if (gp->gp_egv == gv) | |
1610 | gp->gp_egv = 0; | |
dd38834b | 1611 | GvGP(gv) = 0; |
79072805 | 1612 | return; |
748a9306 | 1613 | } |
79072805 | 1614 | |
c9ce39a9 RGS |
1615 | if (gp->gp_file_hek) |
1616 | unshare_hek(gp->gp_file_hek); | |
c9da69fb AL |
1617 | SvREFCNT_dec(gp->gp_sv); |
1618 | SvREFCNT_dec(gp->gp_av); | |
bfcb3514 NC |
1619 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1620 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
1621 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { | |
bfcb3514 NC |
1622 | const char *hvname = HvNAME_get(gp->gp_hv); |
1623 | if (PL_stashcache && hvname) | |
04fe65b0 | 1624 | (void)hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
7423f6db | 1625 | G_DISCARD); |
bfcb3514 | 1626 | SvREFCNT_dec(gp->gp_hv); |
13207a71 | 1627 | } |
c9da69fb AL |
1628 | SvREFCNT_dec(gp->gp_io); |
1629 | SvREFCNT_dec(gp->gp_cv); | |
1630 | SvREFCNT_dec(gp->gp_form); | |
748a9306 | 1631 | |
79072805 LW |
1632 | Safefree(gp); |
1633 | GvGP(gv) = 0; | |
1634 | } | |
1635 | ||
d460ef45 NIS |
1636 | int |
1637 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
1638 | { | |
53c1dcc0 AL |
1639 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1640 | PERL_UNUSED_ARG(sv); | |
dd374669 | 1641 | |
7918f24d NC |
1642 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
1643 | ||
d460ef45 NIS |
1644 | if (amtp && AMT_AMAGIC(amtp)) { |
1645 | int i; | |
1646 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 1647 | CV * const cv = amtp->table[i]; |
b37c2d43 | 1648 | if (cv) { |
d460ef45 | 1649 | SvREFCNT_dec((SV *) cv); |
601f1833 | 1650 | amtp->table[i] = NULL; |
d460ef45 NIS |
1651 | } |
1652 | } | |
1653 | } | |
1654 | return 0; | |
1655 | } | |
1656 | ||
a0d0e21e LW |
1657 | /* Updates and caches the CV's */ |
1658 | ||
1659 | bool | |
864dbfa3 | 1660 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e | 1661 | { |
97aff369 | 1662 | dVAR; |
53c1dcc0 | 1663 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
a6006777 | 1664 | AMT amt; |
9b439311 | 1665 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 1666 | U32 newgen; |
a0d0e21e | 1667 | |
7918f24d NC |
1668 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
1669 | ||
9b439311 | 1670 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
1671 | if (mg) { |
1672 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
1673 | if (amtp->was_ok_am == PL_amagic_generation | |
e1a479c5 | 1674 | && amtp->was_ok_sub == newgen) { |
14899595 NC |
1675 | return (bool)AMT_OVERLOADED(amtp); |
1676 | } | |
1677 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); | |
1678 | } | |
a0d0e21e | 1679 | |
bfcb3514 | 1680 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 1681 | |
d460ef45 | 1682 | Zero(&amt,1,AMT); |
3280af22 | 1683 | amt.was_ok_am = PL_amagic_generation; |
e1a479c5 | 1684 | amt.was_ok_sub = newgen; |
a6006777 | 1685 | amt.fallback = AMGfallNO; |
1686 | amt.flags = 0; | |
1687 | ||
a6006777 | 1688 | { |
32251b26 IZ |
1689 | int filled = 0, have_ovl = 0; |
1690 | int i, lim = 1; | |
a6006777 | 1691 | |
22c35a8c | 1692 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 1693 | |
89ffc314 | 1694 | /* Try to find via inheritance. */ |
53c1dcc0 AL |
1695 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1696 | SV * const sv = gv ? GvSV(gv) : NULL; | |
1697 | CV* cv; | |
89ffc314 IZ |
1698 | |
1699 | if (!gv) | |
32251b26 | 1700 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 NC |
1701 | #ifdef PERL_DONT_CREATE_GVSV |
1702 | else if (!sv) { | |
6f207bd3 | 1703 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 NC |
1704 | } |
1705 | #endif | |
89ffc314 IZ |
1706 | else if (SvTRUE(sv)) |
1707 | amt.fallback=AMGfallYES; | |
1708 | else if (SvOK(sv)) | |
1709 | amt.fallback=AMGfallNEVER; | |
a6006777 | 1710 | |
32251b26 | 1711 | for (i = 1; i < lim; i++) |
601f1833 | 1712 | amt.table[i] = NULL; |
32251b26 | 1713 | for (; i < NofAMmeth; i++) { |
6136c704 | 1714 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 1715 | /* Human-readable form, for debugging: */ |
6136c704 | 1716 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
d279ab82 | 1717 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 | 1718 | |
a0288114 | 1719 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 1720 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
1721 | /* don't fill the cache while looking up! |
1722 | Creation of inheritance stubs in intermediate packages may | |
1723 | conflict with the logic of runtime method substitution. | |
1724 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
1725 | then we could have created stubs for "(+0" in A and C too. | |
1726 | But if B overloads "bool", we may want to use it for | |
1727 | numifying instead of C's "+0". */ | |
1728 | if (i >= DESTROY_amg) | |
1729 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); | |
1730 | else /* Autoload taken care of below */ | |
1731 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); | |
46fc3d4c | 1732 | cv = 0; |
89ffc314 | 1733 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 | 1734 | const char *hvname; |
44a8e56a | 1735 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 | 1736 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 IZ |
1737 | /* This is a hack to support autoloading..., while |
1738 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 1739 | /* GvSV contains the name of the method. */ |
6136c704 | 1740 | GV *ngv = NULL; |
c69033f2 | 1741 | SV *gvsv = GvSV(gv); |
a0288114 AL |
1742 | |
1743 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
1744 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
ca0270c4 | 1745 | (void*)GvSV(gv), cp, hvname) ); |
c69033f2 NC |
1746 | if (!gvsv || !SvPOK(gvsv) |
1747 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), | |
dc848c6f | 1748 | FALSE))) |
1749 | { | |
a0288114 | 1750 | /* Can be an import stub (created by "can"). */ |
666ea192 | 1751 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
a0288114 AL |
1752 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1753 | "in package \"%.256s\"", | |
35c1215d NC |
1754 | (GvCVGEN(gv) ? "Stub found while resolving" |
1755 | : "Can't resolve"), | |
bfcb3514 | 1756 | name, cp, hvname); |
44a8e56a | 1757 | } |
dc848c6f | 1758 | cv = GvCV(gv = ngv); |
44a8e56a | 1759 | } |
b464bac0 | 1760 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 1761 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 1762 | GvNAME(CvGV(cv))) ); |
1763 | filled = 1; | |
32251b26 IZ |
1764 | if (i < DESTROY_amg) |
1765 | have_ovl = 1; | |
611c1e95 IZ |
1766 | } else if (gv) { /* Autoloaded... */ |
1767 | cv = (CV*)gv; | |
1768 | filled = 1; | |
44a8e56a | 1769 | } |
b37c2d43 | 1770 | amt.table[i]=(CV*)SvREFCNT_inc_simple(cv); |
a0d0e21e | 1771 | } |
a0d0e21e | 1772 | if (filled) { |
a6006777 | 1773 | AMT_AMAGIC_on(&amt); |
32251b26 IZ |
1774 | if (have_ovl) |
1775 | AMT_OVERLOADED_on(&amt); | |
14befaf4 DM |
1776 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1777 | (char*)&amt, sizeof(AMT)); | |
32251b26 | 1778 | return have_ovl; |
a0d0e21e LW |
1779 | } |
1780 | } | |
a6006777 | 1781 | /* Here we have no table: */ |
9cbac4c7 | 1782 | /* no_table: */ |
a6006777 | 1783 | AMT_AMAGIC_off(&amt); |
14befaf4 DM |
1784 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1785 | (char*)&amt, sizeof(AMTS)); | |
a0d0e21e LW |
1786 | return FALSE; |
1787 | } | |
1788 | ||
32251b26 IZ |
1789 | |
1790 | CV* | |
1791 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
1792 | { | |
97aff369 | 1793 | dVAR; |
3f8f4626 | 1794 | MAGIC *mg; |
32251b26 | 1795 | AMT *amtp; |
e1a479c5 | 1796 | U32 newgen; |
9b439311 | 1797 | struct mro_meta* stash_meta; |
32251b26 | 1798 | |
bfcb3514 | 1799 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 1800 | return NULL; |
e1a479c5 | 1801 | |
9b439311 BB |
1802 | stash_meta = HvMROMETA(stash); |
1803 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 1804 | |
14befaf4 | 1805 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
1806 | if (!mg) { |
1807 | do_update: | |
1808 | Gv_AMupdate(stash); | |
14befaf4 | 1809 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 | 1810 | } |
a9fd4e40 | 1811 | assert(mg); |
32251b26 IZ |
1812 | amtp = (AMT*)mg->mg_ptr; |
1813 | if ( amtp->was_ok_am != PL_amagic_generation | |
e1a479c5 | 1814 | || amtp->was_ok_sub != newgen ) |
32251b26 | 1815 | goto do_update; |
3ad83ce7 | 1816 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 1817 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
1818 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1819 | /* Passing it through may have resulted in a warning | |
1820 | "Inherited AUTOLOAD for a non-method deprecated", since | |
1821 | our caller is going through a function call, not a method call. | |
1822 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 1823 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
1824 | |
1825 | if (gv && GvCV(gv)) | |
1826 | return GvCV(gv); | |
1827 | } | |
1828 | return ret; | |
1829 | } | |
a0288114 | 1830 | |
601f1833 | 1831 | return NULL; |
32251b26 IZ |
1832 | } |
1833 | ||
1834 | ||
a0d0e21e | 1835 | SV* |
864dbfa3 | 1836 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 1837 | { |
27da23d5 | 1838 | dVAR; |
b267980d | 1839 | MAGIC *mg; |
9c5ffd7c | 1840 | CV *cv=NULL; |
a0d0e21e | 1841 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 1842 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
1843 | int off = 0, off1, lr = 0, notfound = 0; |
1844 | int postpr = 0, force_cpy = 0; | |
1845 | int assign = AMGf_assign & flags; | |
1846 | const int assignshift = assign ? 1 : 0; | |
497b47a8 JH |
1847 | #ifdef DEBUGGING |
1848 | int fl=0; | |
497b47a8 | 1849 | #endif |
25716404 | 1850 | HV* stash=NULL; |
7918f24d NC |
1851 | |
1852 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
1853 | ||
a0d0e21e | 1854 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 GS |
1855 | && (stash = SvSTASH(SvRV(left))) |
1856 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1857 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1858 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 1859 | : NULL)) |
b267980d | 1860 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
1861 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1862 | * usual method */ | |
497b47a8 JH |
1863 | ( |
1864 | #ifdef DEBUGGING | |
1865 | fl = 1, | |
a0288114 | 1866 | #endif |
497b47a8 | 1867 | cv = cvp[off=method])))) { |
a0d0e21e LW |
1868 | lr = -1; /* Call method for left argument */ |
1869 | } else { | |
1870 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
1871 | int logic; | |
1872 | ||
1873 | /* look for substituted methods */ | |
ee239bfe | 1874 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
1875 | switch (method) { |
1876 | case inc_amg: | |
ee239bfe IZ |
1877 | force_cpy = 1; |
1878 | if ((cv = cvp[off=add_ass_amg]) | |
1879 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 1880 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1881 | } |
1882 | break; | |
1883 | case dec_amg: | |
ee239bfe IZ |
1884 | force_cpy = 1; |
1885 | if ((cv = cvp[off = subtr_ass_amg]) | |
1886 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 1887 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1888 | } |
1889 | break; | |
1890 | case bool__amg: | |
1891 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
1892 | break; | |
1893 | case numer_amg: | |
1894 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
1895 | break; | |
1896 | case string_amg: | |
1897 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
1898 | break; | |
b7787f18 AL |
1899 | case not_amg: |
1900 | (void)((cv = cvp[off=bool__amg]) | |
1901 | || (cv = cvp[off=numer_amg]) | |
1902 | || (cv = cvp[off=string_amg])); | |
1903 | postpr = 1; | |
1904 | break; | |
748a9306 LW |
1905 | case copy_amg: |
1906 | { | |
76e3520e GS |
1907 | /* |
1908 | * SV* ref causes confusion with the interpreter variable of | |
1909 | * the same name | |
1910 | */ | |
890ce7af | 1911 | SV* const tmpRef=SvRV(left); |
76e3520e | 1912 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 1913 | /* |
1914 | * Just to be extra cautious. Maybe in some | |
1915 | * additional cases sv_setsv is safe, too. | |
1916 | */ | |
890ce7af | 1917 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 1918 | SvOBJECT_on(newref); |
96d4b0ee NC |
1919 | /* As a bit of a source compatibility hack, SvAMAGIC() and |
1920 | friends dereference an RV, to behave the same was as when | |
1921 | overloading was stored on the reference, not the referant. | |
1922 | Hence we can't use SvAMAGIC_on() | |
1923 | */ | |
1924 | SvFLAGS(newref) |= SVf_AMAGIC; | |
b162af07 | 1925 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 LW |
1926 | return newref; |
1927 | } | |
1928 | } | |
1929 | break; | |
a0d0e21e | 1930 | case abs_amg: |
b267980d | 1931 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 1932 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 1933 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 1934 | if (off1==lt_amg) { |
890ce7af | 1935 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1936 | lt_amg,AMGf_noright); |
1937 | logic = SvTRUE(lessp); | |
1938 | } else { | |
890ce7af | 1939 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1940 | ncmp_amg,AMGf_noright); |
1941 | logic = (SvNV(lessp) < 0); | |
1942 | } | |
1943 | if (logic) { | |
1944 | if (off==subtr_amg) { | |
1945 | right = left; | |
748a9306 | 1946 | left = nullsv; |
a0d0e21e LW |
1947 | lr = 1; |
1948 | } | |
1949 | } else { | |
1950 | return left; | |
1951 | } | |
1952 | } | |
1953 | break; | |
1954 | case neg_amg: | |
155aba94 | 1955 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
1956 | right = left; |
1957 | left = sv_2mortal(newSViv(0)); | |
1958 | lr = 1; | |
1959 | } | |
1960 | break; | |
f216259d | 1961 | case int_amg: |
f5284f61 | 1962 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d NIS |
1963 | /* FAIL safe */ |
1964 | return NULL; /* Delegate operation to standard mechanisms. */ | |
1965 | break; | |
f5284f61 IZ |
1966 | case to_sv_amg: |
1967 | case to_av_amg: | |
1968 | case to_hv_amg: | |
1969 | case to_gv_amg: | |
1970 | case to_cv_amg: | |
1971 | /* FAIL safe */ | |
b267980d | 1972 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 | 1973 | break; |
a0d0e21e LW |
1974 | default: |
1975 | goto not_found; | |
1976 | } | |
1977 | if (!cv) goto not_found; | |
1978 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
25716404 GS |
1979 | && (stash = SvSTASH(SvRV(right))) |
1980 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1981 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1982 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 1983 | : NULL)) |
a0d0e21e LW |
1984 | && (cv = cvp[off=method])) { /* Method for right |
1985 | * argument found */ | |
1986 | lr=1; | |
b267980d NIS |
1987 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1988 | && (cvp=ocvp) && (lr = -1)) | |
a0d0e21e LW |
1989 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1990 | && !(flags & AMGf_unary)) { | |
1991 | /* We look for substitution for | |
1992 | * comparison operations and | |
fc36a67e | 1993 | * concatenation */ |
a0d0e21e LW |
1994 | if (method==concat_amg || method==concat_ass_amg |
1995 | || method==repeat_amg || method==repeat_ass_amg) { | |
1996 | return NULL; /* Delegate operation to string conversion */ | |
1997 | } | |
1998 | off = -1; | |
1999 | switch (method) { | |
2000 | case lt_amg: | |
2001 | case le_amg: | |
2002 | case gt_amg: | |
2003 | case ge_amg: | |
2004 | case eq_amg: | |
2005 | case ne_amg: | |
2006 | postpr = 1; off=ncmp_amg; break; | |
2007 | case slt_amg: | |
2008 | case sle_amg: | |
2009 | case sgt_amg: | |
2010 | case sge_amg: | |
2011 | case seq_amg: | |
2012 | case sne_amg: | |
2013 | postpr = 1; off=scmp_amg; break; | |
2014 | } | |
2015 | if (off != -1) cv = cvp[off]; | |
2016 | if (!cv) { | |
2017 | goto not_found; | |
2018 | } | |
2019 | } else { | |
a6006777 | 2020 | not_found: /* No method found, either report or croak */ |
b267980d | 2021 | switch (method) { |
d11ee47c RD |
2022 | case lt_amg: |
2023 | case le_amg: | |
2024 | case gt_amg: | |
2025 | case ge_amg: | |
2026 | case eq_amg: | |
2027 | case ne_amg: | |
2028 | case slt_amg: | |
2029 | case sle_amg: | |
2030 | case sgt_amg: | |
2031 | case sge_amg: | |
2032 | case seq_amg: | |
2033 | case sne_amg: | |
2034 | postpr = 0; break; | |
b267980d NIS |
2035 | case to_sv_amg: |
2036 | case to_av_amg: | |
2037 | case to_hv_amg: | |
2038 | case to_gv_amg: | |
2039 | case to_cv_amg: | |
2040 | /* FAIL safe */ | |
2041 | return left; /* Delegate operation to standard mechanisms. */ | |
2042 | break; | |
2043 | } | |
a0d0e21e LW |
2044 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
2045 | notfound = 1; lr = -1; | |
2046 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
2047 | notfound = 1; lr = 1; | |
4cc0ca18 NC |
2048 | } else if ((amtp && amtp->fallback >= AMGfallYES) && !DEBUG_o_TEST) { |
2049 | /* Skip generating the "no method found" message. */ | |
2050 | return NULL; | |
a0d0e21e | 2051 | } else { |
46fc3d4c | 2052 | SV *msg; |
774d564b | 2053 | if (off==-1) off=method; |
b267980d | 2054 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 | 2055 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 | 2056 | AMG_id2name(method + assignshift), |
e7ea3e70 | 2057 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d | 2058 | SvAMAGIC(left)? |
a0d0e21e LW |
2059 | "in overloaded package ": |
2060 | "has no overloaded magic", | |
b267980d | 2061 | SvAMAGIC(left)? |
bfcb3514 | 2062 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e | 2063 | "", |
b267980d | 2064 | SvAMAGIC(right)? |
e7ea3e70 | 2065 | ",\n\tright argument in overloaded package ": |
b267980d | 2066 | (flags & AMGf_unary |
e7ea3e70 IZ |
2067 | ? "" |
2068 | : ",\n\tright argument has no overloaded magic"), | |
b267980d | 2069 | SvAMAGIC(right)? |
bfcb3514 | 2070 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c | 2071 | "")); |
a0d0e21e | 2072 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 | 2073 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e | 2074 | } else { |
be2597df | 2075 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e LW |
2076 | } |
2077 | return NULL; | |
2078 | } | |
ee239bfe | 2079 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
2080 | } |
2081 | } | |
497b47a8 | 2082 | #ifdef DEBUGGING |
a0d0e21e | 2083 | if (!notfound) { |
497b47a8 | 2084 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 | 2085 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 JH |
2086 | AMG_id2name(off), |
2087 | method+assignshift==off? "" : | |
a0288114 | 2088 | " (initially \"", |
497b47a8 JH |
2089 | method+assignshift==off? "" : |
2090 | AMG_id2name(method+assignshift), | |
a0288114 | 2091 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
2092 | flags & AMGf_unary? "" : |
2093 | lr==1 ? " for right argument": " for left argument", | |
2094 | flags & AMGf_unary? " for argument" : "", | |
bfcb3514 | 2095 | stash ? HvNAME_get(stash) : "null", |
497b47a8 | 2096 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 2097 | } |
497b47a8 | 2098 | #endif |
748a9306 LW |
2099 | /* Since we use shallow copy during assignment, we need |
2100 | * to dublicate the contents, probably calling user-supplied | |
2101 | * version of copy operator | |
2102 | */ | |
ee239bfe IZ |
2103 | /* We need to copy in following cases: |
2104 | * a) Assignment form was called. | |
2105 | * assignshift==1, assign==T, method + 1 == off | |
2106 | * b) Increment or decrement, called directly. | |
2107 | * assignshift==0, assign==0, method + 0 == off | |
2108 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 2109 | * assignshift==0, assign==T, |
ee239bfe IZ |
2110 | * force_cpy == T |
2111 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 2112 | * assignshift==0, assign==0, |
ee239bfe IZ |
2113 | * force_cpy == T |
2114 | * e) Assignment form translated to nomethod. | |
2115 | * assignshift==1, assign==T, method + 1 != off | |
2116 | * force_cpy == T | |
2117 | */ | |
2118 | /* off is method, method+assignshift, or a result of opcode substitution. | |
2119 | * In the latter case assignshift==0, so only notfound case is important. | |
2120 | */ | |
2121 | if (( (method + assignshift == off) | |
2122 | && (assign || (method == inc_amg) || (method == dec_amg))) | |
2123 | || force_cpy) | |
2124 | RvDEEPCP(left); | |
a0d0e21e LW |
2125 | { |
2126 | dSP; | |
2127 | BINOP myop; | |
2128 | SV* res; | |
b7787f18 | 2129 | const bool oldcatch = CATCH_GET; |
a0d0e21e | 2130 | |
54310121 | 2131 | CATCH_SET(TRUE); |
a0d0e21e LW |
2132 | Zero(&myop, 1, BINOP); |
2133 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 2134 | myop.op_next = NULL; |
54310121 | 2135 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e | 2136 | |
e788e7d3 | 2137 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 2138 | ENTER; |
462e5cf6 | 2139 | SAVEOP(); |
533c011a | 2140 | PL_op = (OP *) &myop; |
3280af22 | 2141 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 2142 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 2143 | PUTBACK; |
cea2e8a9 | 2144 | pp_pushmark(); |
a0d0e21e | 2145 | |
924508f0 | 2146 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
2147 | PUSHs(lr>0? right: left); |
2148 | PUSHs(lr>0? left: right); | |
3280af22 | 2149 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 2150 | if (notfound) { |
59cd0e26 NC |
2151 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
2152 | AMG_id2namelen(method + assignshift), SVs_TEMP)); | |
a0d0e21e LW |
2153 | } |
2154 | PUSHs((SV*)cv); | |
2155 | PUTBACK; | |
2156 | ||
155aba94 | 2157 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 | 2158 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
2159 | LEAVE; |
2160 | SPAGAIN; | |
2161 | ||
2162 | res=POPs; | |
ebafeae7 | 2163 | PUTBACK; |
d3acc0f7 | 2164 | POPSTACK; |
54310121 | 2165 | CATCH_SET(oldcatch); |
a0d0e21e | 2166 | |
a0d0e21e | 2167 | if (postpr) { |
b7787f18 | 2168 | int ans; |
a0d0e21e LW |
2169 | switch (method) { |
2170 | case le_amg: | |
2171 | case sle_amg: | |
2172 | ans=SvIV(res)<=0; break; | |
2173 | case lt_amg: | |
2174 | case slt_amg: | |
2175 | ans=SvIV(res)<0; break; | |
2176 | case ge_amg: | |
2177 | case sge_amg: | |
2178 | ans=SvIV(res)>=0; break; | |
2179 | case gt_amg: | |
2180 | case sgt_amg: | |
2181 | ans=SvIV(res)>0; break; | |
2182 | case eq_amg: | |
2183 | case seq_amg: | |
2184 | ans=SvIV(res)==0; break; | |
2185 | case ne_amg: | |
2186 | case sne_amg: | |
2187 | ans=SvIV(res)!=0; break; | |
2188 | case inc_amg: | |
2189 | case dec_amg: | |
bbce6d69 | 2190 | SvSetSV(left,res); return left; |
dc437b57 | 2191 | case not_amg: |
fe7ac86a | 2192 | ans=!SvTRUE(res); break; |
b7787f18 AL |
2193 | default: |
2194 | ans=0; break; | |
a0d0e21e | 2195 | } |
54310121 | 2196 | return boolSV(ans); |
748a9306 LW |
2197 | } else if (method==copy_amg) { |
2198 | if (!SvROK(res)) { | |
cea2e8a9 | 2199 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
2200 | } |
2201 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
2202 | } else { |
2203 | return res; | |
2204 | } | |
2205 | } | |
2206 | } | |
c9d5ac95 GS |
2207 | |
2208 | /* | |
7fc63493 | 2209 | =for apidoc is_gv_magical_sv |
c9d5ac95 | 2210 | |
7a5fd60d NC |
2211 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
2212 | ||
2213 | =cut | |
2214 | */ | |
2215 | ||
2216 | bool | |
2217 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) | |
2218 | { | |
2219 | STRLEN len; | |
b64e5050 | 2220 | const char * const temp = SvPV_const(name, len); |
7918f24d NC |
2221 | |
2222 | PERL_ARGS_ASSERT_IS_GV_MAGICAL_SV; | |
2223 | ||
7a5fd60d NC |
2224 | return is_gv_magical(temp, len, flags); |
2225 | } | |
2226 | ||
2227 | /* | |
2228 | =for apidoc is_gv_magical | |
2229 | ||
c9d5ac95 GS |
2230 | Returns C<TRUE> if given the name of a magical GV. |
2231 | ||
2232 | Currently only useful internally when determining if a GV should be | |
2233 | created even in rvalue contexts. | |
2234 | ||
2235 | C<flags> is not used at present but available for future extension to | |
2236 | allow selecting particular classes of magical variable. | |
2237 | ||
b9b0e72c NC |
2238 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
2239 | This assumption is met by all callers within the perl core, which all pass | |
2240 | pointers returned by SvPV. | |
2241 | ||
c9d5ac95 GS |
2242 | =cut |
2243 | */ | |
2244 | bool | |
7fc63493 | 2245 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 | 2246 | { |
b37c2d43 | 2247 | PERL_UNUSED_CONTEXT; |
9d4ba2ae AL |
2248 | PERL_UNUSED_ARG(flags); |
2249 | ||
7918f24d NC |
2250 | PERL_ARGS_ASSERT_IS_GV_MAGICAL; |
2251 | ||
b9b0e72c | 2252 | if (len > 1) { |
b464bac0 | 2253 | const char * const name1 = name + 1; |
b9b0e72c NC |
2254 | switch (*name) { |
2255 | case 'I': | |
f2df7081 | 2256 | if (len == 3 && name[1] == 'S' && name[2] == 'A') |
b9b0e72c NC |
2257 | goto yes; |
2258 | break; | |
2259 | case 'O': | |
9431620d | 2260 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c NC |
2261 | goto yes; |
2262 | break; | |
2263 | case 'S': | |
9431620d | 2264 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c NC |
2265 | goto yes; |
2266 | break; | |
2267 | /* Using ${^...} variables is likely to be sufficiently rare that | |
2268 | it seems sensible to avoid the space hit of also checking the | |
2269 | length. */ | |
2270 | case '\017': /* ${^OPEN} */ | |
9431620d | 2271 | if (strEQ(name1, "PEN")) |
b9b0e72c NC |
2272 | goto yes; |
2273 | break; | |
2274 | case '\024': /* ${^TAINT} */ | |
9431620d | 2275 | if (strEQ(name1, "AINT")) |
b9b0e72c NC |
2276 | goto yes; |
2277 | break; | |
2278 | case '\025': /* ${^UNICODE} */ | |
9431620d | 2279 | if (strEQ(name1, "NICODE")) |
b9b0e72c | 2280 | goto yes; |
a0288114 | 2281 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 | 2282 | goto yes; |
b9b0e72c NC |
2283 | break; |
2284 | case '\027': /* ${^WARNING_BITS} */ | |
9431620d | 2285 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c NC |
2286 | goto yes; |
2287 | break; | |
2288 | case '1': | |
2289 | case '2': | |
2290 | case '3': | |
2291 | case '4': | |
2292 | case '5': | |
2293 | case '6': | |
2294 | case '7': | |
2295 | case '8': | |
2296 | case '9': | |
c9d5ac95 | 2297 | { |
7fc63493 | 2298 | const char *end = name + len; |
c9d5ac95 GS |
2299 | while (--end > name) { |
2300 | if (!isDIGIT(*end)) | |
2301 | return FALSE; | |
2302 | } | |
b9b0e72c NC |
2303 | goto yes; |
2304 | } | |
2305 | } | |
2306 | } else { | |
2307 | /* Because we're already assuming that name is NUL terminated | |
2308 | below, we can treat an empty name as "\0" */ | |
2309 | switch (*name) { | |
2310 | case '&': | |
2311 | case '`': | |
2312 | case '\'': | |
2313 | case ':': | |
2314 | case '?': | |
2315 | case '!': | |
2316 | case '-': | |
2317 | case '#': | |
2318 | case '[': | |
2319 | case '^': | |
2320 | case '~': | |
2321 | case '=': | |
2322 | case '%': | |
2323 | case '.': | |
2324 | case '(': | |
2325 | case ')': | |
2326 | case '<': | |
2327 | case '>': | |
2328 | case ',': | |
2329 | case '\\': | |
2330 | case '/': | |
2331 | case '|': | |
2332 | case '+': | |
2333 | case ';': | |
2334 | case ']': | |
2335 | case '\001': /* $^A */ | |
2336 | case '\003': /* $^C */ | |
2337 | case '\004': /* $^D */ | |
2338 | case '\005': /* $^E */ | |
2339 | case '\006': /* $^F */ | |
2340 | case '\010': /* $^H */ | |
2341 | case '\011': /* $^I, NOT \t in EBCDIC */ | |
2342 | case '\014': /* $^L */ | |
2343 | case '\016': /* $^N */ | |
2344 | case '\017': /* $^O */ | |
2345 | case '\020': /* $^P */ | |
2346 | case '\023': /* $^S */ | |
2347 | case '\024': /* $^T */ | |
2348 | case '\026': /* $^V */ | |
2349 | case '\027': /* $^W */ | |
2350 | case '1': | |
2351 | case '2': | |
2352 | case '3': | |
2353 | case '4': | |
2354 | case '5': | |
2355 | case '6': | |
2356 | case '7': | |
2357 | case '8': | |
2358 | case '9': | |
2359 | yes: | |
2360 | return TRUE; | |
2361 | default: | |
2362 | break; | |
c9d5ac95 | 2363 | } |
c9d5ac95 GS |
2364 | } |
2365 | return FALSE; | |
2366 | } | |
66610fdd | 2367 | |
f5c1e807 NC |
2368 | void |
2369 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
2370 | { | |
2371 | dVAR; | |
acda4c6a | 2372 | U32 hash; |
f5c1e807 | 2373 | |
7918f24d | 2374 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 NC |
2375 | PERL_UNUSED_ARG(flags); |
2376 | ||
acda4c6a NC |
2377 | if (len > I32_MAX) |
2378 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); | |
2379 | ||
ae8cc45f NC |
2380 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2381 | unshare_hek(GvNAME_HEK(gv)); | |
2382 | } | |
2383 | ||
acda4c6a | 2384 | PERL_HASH(hash, name, len); |
9f616d01 | 2385 | GvNAME_HEK(gv) = share_hek(name, len, hash); |
f5c1e807 NC |
2386 | } |
2387 | ||
66610fdd RGS |
2388 | /* |
2389 | * Local variables: | |
2390 | * c-indentation-style: bsd | |
2391 | * c-basic-offset: 4 | |
2392 | * indent-tabs-mode: t | |
2393 | * End: | |
2394 | * | |
37442d52 RGS |
2395 | * ex: set ts=8 sts=4 sw=4 noet: |
2396 | */ |