Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
1129b882 | 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
67fbe0e1 | 4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 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 | |
4ac71550 | 13 | * of your inquisitiveness, I shall spend all the rest of my days in answering |
a0d0e21e LW |
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. | |
4ac71550 TC |
18 | * |
19 | * [p.599 of _The Lord of the Rings_, III/xi: "The PalantÃr"] | |
79072805 LW |
20 | */ |
21 | ||
ccfc67b7 JH |
22 | /* |
23 | =head1 GV Functions | |
166f8a29 DM |
24 | |
25 | A GV is a structure which corresponds to to a Perl typeglob, ie *foo. | |
26 | It is a structure that holds a pointer to a scalar, an array, a hash etc, | |
27 | corresponding to $foo, @foo, %foo. | |
28 | ||
29 | GVs are usually found as values in stashes (symbol table hashes) where | |
30 | Perl stores its global variables. | |
31 | ||
32 | =cut | |
ccfc67b7 JH |
33 | */ |
34 | ||
79072805 | 35 | #include "EXTERN.h" |
864dbfa3 | 36 | #define PERL_IN_GV_C |
79072805 | 37 | #include "perl.h" |
8261f8eb | 38 | #include "overload.c" |
79072805 | 39 | |
f54cb97a AL |
40 | static const char S_autoload[] = "AUTOLOAD"; |
41 | static const STRLEN S_autolen = sizeof(S_autoload)-1; | |
5c7983e5 | 42 | |
c69033f2 | 43 | GV * |
d5713896 | 44 | Perl_gv_add_by_type(pTHX_ GV *gv, svtype type) |
c69033f2 | 45 | { |
d5713896 | 46 | SV **where; |
7918f24d | 47 | |
bb85b28a NC |
48 | if (!gv || SvTYPE((const SV *)gv) != SVt_PVGV) { |
49 | const char *what; | |
50 | if (type == SVt_PVIO) { | |
51 | /* | |
52 | * if it walks like a dirhandle, then let's assume that | |
53 | * this is a dirhandle. | |
54 | */ | |
55 | what = PL_op->op_type == OP_READDIR || | |
56 | PL_op->op_type == OP_TELLDIR || | |
57 | PL_op->op_type == OP_SEEKDIR || | |
58 | PL_op->op_type == OP_REWINDDIR || | |
59 | PL_op->op_type == OP_CLOSEDIR ? | |
60 | "dirhandle" : "filehandle"; | |
61 | /* diag_listed_as: Bad symbol for filehandle */ | |
62 | } else if (type == SVt_PVHV) { | |
63 | what = "hash"; | |
64 | } else { | |
65 | what = type == SVt_PVAV ? "array" : "scalar"; | |
66 | } | |
67 | Perl_croak(aTHX_ "Bad symbol for %s", what); | |
68 | } | |
d5713896 NC |
69 | |
70 | if (type == SVt_PVHV) { | |
71 | where = (SV **)&GvHV(gv); | |
72 | } else if (type == SVt_PVAV) { | |
73 | where = (SV **)&GvAV(gv); | |
bb85b28a NC |
74 | } else if (type == SVt_PVIO) { |
75 | where = (SV **)&GvIOp(gv); | |
d5713896 NC |
76 | } else { |
77 | where = &GvSV(gv); | |
78 | } | |
7918f24d | 79 | |
d5713896 NC |
80 | if (!*where) |
81 | *where = newSV_type(type); | |
79072805 LW |
82 | return gv; |
83 | } | |
84 | ||
85 | GV * | |
864dbfa3 | 86 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 87 | { |
7918f24d | 88 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec NC |
89 | return gv_fetchfile_flags(name, strlen(name), 0); |
90 | } | |
91 | ||
92 | GV * | |
93 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
94 | const U32 flags) | |
95 | { | |
97aff369 | 96 | dVAR; |
4116122e | 97 | char smallbuf[128]; |
53d95988 | 98 | char *tmpbuf; |
d9095cec | 99 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
100 | GV *gv; |
101 | ||
7918f24d | 102 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec NC |
103 | PERL_UNUSED_ARG(flags); |
104 | ||
1d7c1841 | 105 | if (!PL_defstash) |
a0714e2c | 106 | return NULL; |
1d7c1841 | 107 | |
d9095cec | 108 | if (tmplen <= sizeof smallbuf) |
53d95988 CS |
109 | tmpbuf = smallbuf; |
110 | else | |
798b63bc | 111 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 112 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
113 | tmpbuf[0] = '_'; |
114 | tmpbuf[1] = '<'; | |
d9095cec NC |
115 | memcpy(tmpbuf + 2, name, namelen); |
116 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); | |
1d7c1841 | 117 | if (!isGV(gv)) { |
d9095cec | 118 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 | 119 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec | 120 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 121 | #else |
d9095cec | 122 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 123 | #endif |
65269a95 | 124 | if (PERLDB_LINE || PERLDB_SAVESRC) |
a0714e2c | 125 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); |
1d7c1841 | 126 | } |
53d95988 CS |
127 | if (tmpbuf != smallbuf) |
128 | Safefree(tmpbuf); | |
79072805 LW |
129 | return gv; |
130 | } | |
131 | ||
62d55b22 NC |
132 | /* |
133 | =for apidoc gv_const_sv | |
134 | ||
135 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
136 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
137 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
138 | NULL. | |
139 | ||
140 | =cut | |
141 | */ | |
142 | ||
143 | SV * | |
144 | Perl_gv_const_sv(pTHX_ GV *gv) | |
145 | { | |
7918f24d NC |
146 | PERL_ARGS_ASSERT_GV_CONST_SV; |
147 | ||
62d55b22 NC |
148 | if (SvTYPE(gv) == SVt_PVGV) |
149 | return cv_const_sv(GvCVu(gv)); | |
150 | return SvROK(gv) ? SvRV(gv) : NULL; | |
151 | } | |
152 | ||
12816592 NC |
153 | GP * |
154 | Perl_newGP(pTHX_ GV *const gv) | |
155 | { | |
156 | GP *gp; | |
19bad673 NC |
157 | U32 hash; |
158 | #ifdef USE_ITHREADS | |
1df5f7c1 NC |
159 | const char *const file |
160 | = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : ""; | |
19bad673 NC |
161 | const STRLEN len = strlen(file); |
162 | #else | |
163 | SV *const temp_sv = CopFILESV(PL_curcop); | |
164 | const char *file; | |
165 | STRLEN len; | |
166 | ||
7918f24d NC |
167 | PERL_ARGS_ASSERT_NEWGP; |
168 | ||
19bad673 NC |
169 | if (temp_sv) { |
170 | file = SvPVX(temp_sv); | |
171 | len = SvCUR(temp_sv); | |
172 | } else { | |
173 | file = ""; | |
174 | len = 0; | |
175 | } | |
176 | #endif | |
f4890806 NC |
177 | |
178 | PERL_HASH(hash, file, len); | |
179 | ||
12816592 NC |
180 | Newxz(gp, 1, GP); |
181 | ||
182 | #ifndef PERL_DONT_CREATE_GVSV | |
b5c2dcb8 | 183 | gp->gp_sv = newSV(0); |
12816592 NC |
184 | #endif |
185 | ||
1df5f7c1 | 186 | gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0; |
12816592 NC |
187 | /* XXX Ideally this cast would be replaced with a change to const char* |
188 | in the struct. */ | |
f4890806 | 189 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
190 | gp->gp_egv = gv; |
191 | gp->gp_refcnt = 1; | |
192 | ||
193 | return gp; | |
194 | } | |
195 | ||
803f2748 DM |
196 | /* Assign CvGV(cv) = gv, handling weak references. |
197 | * See also S_anonymise_cv_maybe */ | |
198 | ||
199 | void | |
200 | Perl_cvgv_set(pTHX_ CV* cv, GV* gv) | |
201 | { | |
202 | GV * const oldgv = CvGV(cv); | |
203 | PERL_ARGS_ASSERT_CVGV_SET; | |
204 | ||
205 | if (oldgv == gv) | |
206 | return; | |
207 | ||
208 | if (oldgv) { | |
209 | if (CvANON(cv)) | |
210 | SvREFCNT_dec(oldgv); | |
211 | else { | |
212 | assert(strNE(GvNAME(oldgv),"__ANON__")); | |
213 | sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv)); | |
214 | } | |
215 | } | |
216 | ||
217 | CvGV(cv) = gv; | |
218 | ||
219 | if (!gv) | |
220 | return; | |
221 | ||
222 | if (CvANON(cv)) { | |
223 | assert(strnEQ(GvNAME(gv),"__ANON__", 8)); | |
224 | SvREFCNT_inc_simple_void_NN(gv); | |
225 | } | |
226 | else { | |
227 | assert(strNE(GvNAME(gv),"__ANON__")); | |
228 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv)); | |
229 | } | |
230 | } | |
231 | ||
232 | ||
463ee0b2 | 233 | void |
864dbfa3 | 234 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 | 235 | { |
27da23d5 | 236 | dVAR; |
3b6733bf NC |
237 | const U32 old_type = SvTYPE(gv); |
238 | const bool doproto = old_type > SVt_NULL; | |
024963f8 | 239 | char * const proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
49a54bbe | 240 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
756cb477 | 241 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 242 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 | 243 | |
7918f24d | 244 | PERL_ARGS_ASSERT_GV_INIT; |
756cb477 NC |
245 | assert (!(proto && has_constant)); |
246 | ||
247 | if (has_constant) { | |
5c1f4d79 NC |
248 | /* The constant has to be a simple scalar type. */ |
249 | switch (SvTYPE(has_constant)) { | |
250 | case SVt_PVAV: | |
251 | case SVt_PVHV: | |
252 | case SVt_PVCV: | |
253 | case SVt_PVFM: | |
254 | case SVt_PVIO: | |
255 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
256 | sv_reftype(has_constant, 0)); | |
42d0e0b7 | 257 | default: NOOP; |
5c1f4d79 | 258 | } |
756cb477 NC |
259 | SvRV_set(gv, NULL); |
260 | SvROK_off(gv); | |
261 | } | |
463ee0b2 | 262 | |
3b6733bf NC |
263 | |
264 | if (old_type < SVt_PVGV) { | |
265 | if (old_type >= SVt_PV) | |
266 | SvCUR_set(gv, 0); | |
ad64d0ec | 267 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); |
3b6733bf | 268 | } |
55d729e4 GS |
269 | if (SvLEN(gv)) { |
270 | if (proto) { | |
f880fe2f | 271 | SvPV_set(gv, NULL); |
b162af07 | 272 | SvLEN_set(gv, 0); |
55d729e4 GS |
273 | SvPOK_off(gv); |
274 | } else | |
94010e71 | 275 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 276 | } |
2e5b91de NC |
277 | SvIOK_off(gv); |
278 | isGV_with_GP_on(gv); | |
12816592 NC |
279 | |
280 | GvGP(gv) = Perl_newGP(aTHX_ gv); | |
e15faf7d NC |
281 | GvSTASH(gv) = stash; |
282 | if (stash) | |
ad64d0ec | 283 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
ae8cc45f | 284 | gv_name_set(gv, name, len, GV_ADD); |
23ad5bf5 | 285 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 | 286 | GvMULTI_on(gv); |
55d729e4 | 287 | if (doproto) { /* Replicate part of newSUB here. */ |
e3d2b9e7 | 288 | CV *cv; |
55d729e4 | 289 | ENTER; |
756cb477 NC |
290 | if (has_constant) { |
291 | /* newCONSTSUB takes ownership of the reference from us. */ | |
e3d2b9e7 | 292 | cv = newCONSTSUB(stash, name, has_constant); |
1ccdb730 NC |
293 | /* If this reference was a copy of another, then the subroutine |
294 | must have been "imported", by a Perl space assignment to a GV | |
295 | from a reference to CV. */ | |
296 | if (exported_constant) | |
297 | GvIMPORTED_CV_on(gv); | |
756cb477 | 298 | } else { |
756cb477 | 299 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
e3d2b9e7 | 300 | cv = PL_compcv; |
756cb477 | 301 | } |
e3d2b9e7 | 302 | GvCV(gv) = cv; |
55d729e4 GS |
303 | LEAVE; |
304 | ||
e1a479c5 | 305 | mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */ |
803f2748 | 306 | cvgv_set(cv, gv); |
e3d2b9e7 DM |
307 | CvFILE_set_from_cop(cv, PL_curcop); |
308 | CvSTASH(cv) = PL_curstash; | |
4c74a7df DM |
309 | if (PL_curstash) |
310 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(PL_curstash), MUTABLE_SV(cv)); | |
55d729e4 | 311 | if (proto) { |
e3d2b9e7 | 312 | sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen, |
49a54bbe | 313 | SV_HAS_TRAILING_NUL); |
55d729e4 GS |
314 | } |
315 | } | |
463ee0b2 LW |
316 | } |
317 | ||
76e3520e | 318 | STATIC void |
fe9845cc | 319 | S_gv_init_sv(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 320 | { |
7918f24d NC |
321 | PERL_ARGS_ASSERT_GV_INIT_SV; |
322 | ||
a0d0e21e LW |
323 | switch (sv_type) { |
324 | case SVt_PVIO: | |
325 | (void)GvIOn(gv); | |
326 | break; | |
327 | case SVt_PVAV: | |
328 | (void)GvAVn(gv); | |
329 | break; | |
330 | case SVt_PVHV: | |
331 | (void)GvHVn(gv); | |
332 | break; | |
c69033f2 NC |
333 | #ifdef PERL_DONT_CREATE_GVSV |
334 | case SVt_NULL: | |
335 | case SVt_PVCV: | |
336 | case SVt_PVFM: | |
e654831b | 337 | case SVt_PVGV: |
c69033f2 NC |
338 | break; |
339 | default: | |
dbdce04c NC |
340 | if(GvSVn(gv)) { |
341 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
342 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
343 | its side effect */ | |
344 | } | |
c69033f2 | 345 | #endif |
a0d0e21e LW |
346 | } |
347 | } | |
348 | ||
954c1994 GS |
349 | /* |
350 | =for apidoc gv_fetchmeth | |
351 | ||
352 | Returns the glob with the given C<name> and a defined subroutine or | |
353 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
07766739 | 354 | accessible via @ISA and UNIVERSAL::. |
954c1994 GS |
355 | |
356 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
357 | side-effect creates a glob with the given C<name> in the given C<stash> | |
358 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 359 | up caching info for this glob. |
954c1994 GS |
360 | |
361 | This function grants C<"SUPER"> token as a postfix of the stash name. The | |
362 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not | |
4929bf7b | 363 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 364 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 365 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
366 | |
367 | =cut | |
368 | */ | |
369 | ||
e1a479c5 BB |
370 | /* NOTE: No support for tied ISA */ |
371 | ||
79072805 | 372 | GV * |
864dbfa3 | 373 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 | 374 | { |
97aff369 | 375 | dVAR; |
463ee0b2 | 376 | GV** gvp; |
e1a479c5 BB |
377 | AV* linear_av; |
378 | SV** linear_svp; | |
379 | SV* linear_sv; | |
380 | HV* cstash; | |
381 | GV* candidate = NULL; | |
382 | CV* cand_cv = NULL; | |
383 | CV* old_cv; | |
384 | GV* topgv = NULL; | |
bfcb3514 | 385 | const char *hvname; |
e1a479c5 BB |
386 | I32 create = (level >= 0) ? 1 : 0; |
387 | I32 items; | |
388 | STRLEN packlen; | |
389 | U32 topgen_cmp; | |
a0d0e21e | 390 | |
7918f24d NC |
391 | PERL_ARGS_ASSERT_GV_FETCHMETH; |
392 | ||
af09ea45 IK |
393 | /* UNIVERSAL methods should be callable without a stash */ |
394 | if (!stash) { | |
e1a479c5 | 395 | create = 0; /* probably appropriate */ |
da51bb9b | 396 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
397 | return 0; |
398 | } | |
399 | ||
e1a479c5 BB |
400 | assert(stash); |
401 | ||
bfcb3514 NC |
402 | hvname = HvNAME_get(stash); |
403 | if (!hvname) | |
e1a479c5 | 404 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 405 | |
e1a479c5 BB |
406 | assert(hvname); |
407 | assert(name); | |
463ee0b2 | 408 | |
bfcb3514 | 409 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a | 410 | |
dd69841b | 411 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 BB |
412 | |
413 | /* check locally for a real method or a cache entry */ | |
414 | gvp = (GV**)hv_fetch(stash, name, len, create); | |
415 | if(gvp) { | |
416 | topgv = *gvp; | |
417 | assert(topgv); | |
418 | if (SvTYPE(topgv) != SVt_PVGV) | |
419 | gv_init(topgv, stash, name, len, TRUE); | |
420 | if ((cand_cv = GvCV(topgv))) { | |
421 | /* If genuine method or valid cache entry, use it */ | |
422 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
423 | return topgv; | |
424 | } | |
425 | else { | |
426 | /* stale cache entry, junk it and move on */ | |
427 | SvREFCNT_dec(cand_cv); | |
428 | GvCV(topgv) = cand_cv = NULL; | |
429 | GvCVGEN(topgv) = 0; | |
430 | } | |
431 | } | |
432 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
433 | /* cache indicates no such method definitively */ | |
434 | return 0; | |
435 | } | |
463ee0b2 | 436 | } |
79072805 | 437 | |
e1a479c5 BB |
438 | packlen = HvNAMELEN_get(stash); |
439 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { | |
440 | HV* basestash; | |
441 | packlen -= 7; | |
442 | basestash = gv_stashpvn(hvname, packlen, GV_ADD); | |
443 | linear_av = mro_get_linear_isa(basestash); | |
9607fc9c | 444 | } |
e1a479c5 BB |
445 | else { |
446 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ | |
79072805 | 447 | } |
a0d0e21e | 448 | |
e1a479c5 BB |
449 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
450 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
451 | while (items--) { | |
452 | linear_sv = *linear_svp++; | |
453 | assert(linear_sv); | |
454 | cstash = gv_stashsv(linear_sv, 0); | |
455 | ||
dd69841b | 456 | if (!cstash) { |
a2a5de95 NC |
457 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA", |
458 | SVfARG(linear_sv), hvname); | |
e1a479c5 BB |
459 | continue; |
460 | } | |
9607fc9c | 461 | |
e1a479c5 BB |
462 | assert(cstash); |
463 | ||
464 | gvp = (GV**)hv_fetch(cstash, name, len, 0); | |
465 | if (!gvp) continue; | |
466 | candidate = *gvp; | |
467 | assert(candidate); | |
468 | if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE); | |
469 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { | |
470 | /* | |
471 | * Found real method, cache method in topgv if: | |
472 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
473 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
474 | */ | |
475 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
476 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); | |
477 | SvREFCNT_inc_simple_void_NN(cand_cv); | |
478 | GvCV(topgv) = cand_cv; | |
479 | GvCVGEN(topgv) = topgen_cmp; | |
480 | } | |
481 | return candidate; | |
482 | } | |
483 | } | |
9607fc9c | 484 | |
e1a479c5 BB |
485 | /* Check UNIVERSAL without caching */ |
486 | if(level == 0 || level == -1) { | |
487 | candidate = gv_fetchmeth(NULL, name, len, 1); | |
488 | if(candidate) { | |
489 | cand_cv = GvCV(candidate); | |
490 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
491 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); | |
492 | SvREFCNT_inc_simple_void_NN(cand_cv); | |
493 | GvCV(topgv) = cand_cv; | |
494 | GvCVGEN(topgv) = topgen_cmp; | |
495 | } | |
496 | return candidate; | |
497 | } | |
498 | } | |
499 | ||
500 | if (topgv && GvREFCNT(topgv) == 1) { | |
501 | /* cache the fact that the method is not defined */ | |
502 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
503 | } |
504 | ||
79072805 LW |
505 | return 0; |
506 | } | |
507 | ||
954c1994 | 508 | /* |
611c1e95 IZ |
509 | =for apidoc gv_fetchmeth_autoload |
510 | ||
511 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. | |
512 | Returns a glob for the subroutine. | |
513 | ||
514 | For an autoloaded subroutine without a GV, will create a GV even | |
515 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() | |
516 | of the result may be zero. | |
517 | ||
518 | =cut | |
519 | */ | |
520 | ||
521 | GV * | |
522 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) | |
523 | { | |
524 | GV *gv = gv_fetchmeth(stash, name, len, level); | |
525 | ||
7918f24d NC |
526 | PERL_ARGS_ASSERT_GV_FETCHMETH_AUTOLOAD; |
527 | ||
611c1e95 | 528 | if (!gv) { |
611c1e95 IZ |
529 | CV *cv; |
530 | GV **gvp; | |
531 | ||
532 | if (!stash) | |
6136c704 | 533 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b | 534 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 | 535 | return NULL; |
5c7983e5 | 536 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 | 537 | return NULL; |
611c1e95 IZ |
538 | cv = GvCV(gv); |
539 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 540 | return NULL; |
611c1e95 IZ |
541 | /* Have an autoload */ |
542 | if (level < 0) /* Cannot do without a stub */ | |
543 | gv_fetchmeth(stash, name, len, 0); | |
544 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
545 | if (!gvp) | |
6136c704 | 546 | return NULL; |
611c1e95 IZ |
547 | return *gvp; |
548 | } | |
549 | return gv; | |
550 | } | |
551 | ||
552 | /* | |
954c1994 GS |
553 | =for apidoc gv_fetchmethod_autoload |
554 | ||
555 | Returns the glob which contains the subroutine to call to invoke the method | |
556 | on the C<stash>. In fact in the presence of autoloading this may be the | |
557 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is | |
b267980d | 558 | already setup. |
954c1994 GS |
559 | |
560 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
561 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 562 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 563 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 564 | with a non-zero C<autoload> parameter. |
954c1994 GS |
565 | |
566 | These functions grant C<"SUPER"> token as a prefix of the method name. Note | |
567 | that if you want to keep the returned glob for a long time, you need to | |
568 | check for it being "AUTOLOAD", since at the later time the call may load a | |
569 | different subroutine due to $AUTOLOAD changing its value. Use the glob | |
b267980d | 570 | created via a side effect to do this. |
954c1994 GS |
571 | |
572 | These functions have the same side-effects and as C<gv_fetchmeth> with | |
573 | C<level==0>. C<name> should be writable if contains C<':'> or C<' | |
574 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to | |
b267980d | 575 | C<call_sv> apply equally to these functions. |
954c1994 GS |
576 | |
577 | =cut | |
578 | */ | |
579 | ||
7d3b1f61 BB |
580 | STATIC HV* |
581 | S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen) | |
582 | { | |
583 | AV* superisa; | |
584 | GV** gvp; | |
585 | GV* gv; | |
586 | HV* stash; | |
587 | ||
7918f24d NC |
588 | PERL_ARGS_ASSERT_GV_GET_SUPER_PKG; |
589 | ||
7d3b1f61 BB |
590 | stash = gv_stashpvn(name, namelen, 0); |
591 | if(stash) return stash; | |
592 | ||
593 | /* If we must create it, give it an @ISA array containing | |
594 | the real package this SUPER is for, so that it's tied | |
595 | into the cache invalidation code correctly */ | |
596 | stash = gv_stashpvn(name, namelen, GV_ADD); | |
597 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); | |
598 | gv = *gvp; | |
599 | gv_init(gv, stash, "ISA", 3, TRUE); | |
600 | superisa = GvAVn(gv); | |
601 | GvMULTI_on(gv); | |
ad64d0ec | 602 | sv_magic(MUTABLE_SV(superisa), MUTABLE_SV(gv), PERL_MAGIC_isa, NULL, 0); |
8e3a4a30 | 603 | #ifdef USE_ITHREADS |
7d3b1f61 | 604 | av_push(superisa, newSVpv(CopSTASHPV(PL_curcop), 0)); |
8e3a4a30 NC |
605 | #else |
606 | av_push(superisa, newSVhek(CopSTASH(PL_curcop) | |
607 | ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL)); | |
608 | #endif | |
7d3b1f61 BB |
609 | |
610 | return stash; | |
611 | } | |
612 | ||
dc848c6f | 613 | GV * |
864dbfa3 | 614 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 615 | { |
547bb267 NC |
616 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
617 | ||
256d1bb2 NC |
618 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
619 | } | |
620 | ||
621 | /* Don't merge this yet, as it's likely to get a len parameter, and possibly | |
622 | even a U32 hash */ | |
623 | GV * | |
624 | Perl_gv_fetchmethod_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
625 | { | |
97aff369 | 626 | dVAR; |
08105a92 | 627 | register const char *nend; |
c445ea15 | 628 | const char *nsplit = NULL; |
a0d0e21e | 629 | GV* gv; |
0dae17bd | 630 | HV* ostash = stash; |
c94593d0 | 631 | const char * const origname = name; |
ad64d0ec | 632 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 NC |
633 | const U32 autoload = flags & GV_AUTOLOAD; |
634 | const U32 do_croak = flags & GV_CROAK; | |
0dae17bd | 635 | |
547bb267 | 636 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_FLAGS; |
7918f24d | 637 | |
eff494dd | 638 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 | 639 | stash = NULL; |
c9bf4021 NC |
640 | else { |
641 | /* The only way stash can become NULL later on is if nsplit is set, | |
642 | which in turn means that there is no need for a SVt_PVHV case | |
643 | the error reporting code. */ | |
644 | } | |
b267980d | 645 | |
463ee0b2 | 646 | for (nend = name; *nend; nend++) { |
c94593d0 | 647 | if (*nend == '\'') { |
a0d0e21e | 648 | nsplit = nend; |
c94593d0 NC |
649 | name = nend + 1; |
650 | } | |
651 | else if (*nend == ':' && *(nend + 1) == ':') { | |
652 | nsplit = nend++; | |
653 | name = nend + 1; | |
654 | } | |
a0d0e21e LW |
655 | } |
656 | if (nsplit) { | |
7edbdc6b | 657 | if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) { |
9607fc9c | 658 | /* ->SUPER::method should really be looked up in original stash */ |
b37c2d43 | 659 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 | 660 | CopSTASHPV(PL_curcop))); |
af09ea45 | 661 | /* __PACKAGE__::SUPER stash should be autovivified */ |
7d3b1f61 | 662 | stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr)); |
cea2e8a9 | 663 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 | 664 | origname, HvNAME_get(stash), name) ); |
4633a7c4 | 665 | } |
e189a56d | 666 | else { |
af09ea45 | 667 | /* don't autovifify if ->NoSuchStash::method */ |
da51bb9b | 668 | stash = gv_stashpvn(origname, nsplit - origname, 0); |
e189a56d IK |
669 | |
670 | /* however, explicit calls to Pkg::SUPER::method may | |
671 | happen, and may require autovivification to work */ | |
672 | if (!stash && (nsplit - origname) >= 7 && | |
673 | strnEQ(nsplit - 7, "::SUPER", 7) && | |
da51bb9b | 674 | gv_stashpvn(origname, nsplit - origname - 7, 0)) |
7d3b1f61 | 675 | stash = gv_get_super_pkg(origname, nsplit - origname); |
e189a56d | 676 | } |
0dae17bd | 677 | ostash = stash; |
4633a7c4 LW |
678 | } |
679 | ||
9607fc9c | 680 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 681 | if (!gv) { |
2f6e0fe7 | 682 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
159b6efe | 683 | gv = MUTABLE_GV(&PL_sv_yes); |
dc848c6f | 684 | else if (autoload) |
0dae17bd | 685 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
256d1bb2 NC |
686 | if (!gv && do_croak) { |
687 | /* Right now this is exclusively for the benefit of S_method_common | |
688 | in pp_hot.c */ | |
689 | if (stash) { | |
690 | Perl_croak(aTHX_ | |
691 | "Can't locate object method \"%s\" via package \"%.*s\"", | |
c49b597d | 692 | name, (int)HvNAMELEN_get(stash), HvNAME_get(stash)); |
256d1bb2 NC |
693 | } |
694 | else { | |
695 | STRLEN packlen; | |
696 | const char *packname; | |
697 | ||
256d1bb2 NC |
698 | if (nsplit) { |
699 | packlen = nsplit - origname; | |
700 | packname = origname; | |
256d1bb2 NC |
701 | } else { |
702 | packname = SvPV_const(error_report, packlen); | |
703 | } | |
704 | ||
705 | Perl_croak(aTHX_ | |
706 | "Can't locate object method \"%s\" via package \"%.*s\"" | |
707 | " (perhaps you forgot to load \"%.*s\"?)", | |
708 | name, (int)packlen, packname, (int)packlen, packname); | |
709 | } | |
710 | } | |
463ee0b2 | 711 | } |
dc848c6f | 712 | else if (autoload) { |
9d4ba2ae | 713 | CV* const cv = GvCV(gv); |
09280a33 CS |
714 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
715 | GV* stubgv; | |
716 | GV* autogv; | |
717 | ||
718 | if (CvANON(cv)) | |
719 | stubgv = gv; | |
720 | else { | |
721 | stubgv = CvGV(cv); | |
722 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
723 | stubgv = gv; | |
724 | } | |
725 | autogv = gv_autoload4(GvSTASH(stubgv), | |
726 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 727 | if (autogv) |
728 | gv = autogv; | |
729 | } | |
730 | } | |
44a8e56a | 731 | |
732 | return gv; | |
733 | } | |
734 | ||
735 | GV* | |
864dbfa3 | 736 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a | 737 | { |
27da23d5 | 738 | dVAR; |
44a8e56a | 739 | GV* gv; |
740 | CV* cv; | |
741 | HV* varstash; | |
742 | GV* vargv; | |
743 | SV* varsv; | |
e1ec3a88 | 744 | const char *packname = ""; |
eae70eaa | 745 | STRLEN packname_len = 0; |
44a8e56a | 746 | |
7918f24d NC |
747 | PERL_ARGS_ASSERT_GV_AUTOLOAD4; |
748 | ||
7edbdc6b | 749 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c | 750 | return NULL; |
0dae17bd GS |
751 | if (stash) { |
752 | if (SvTYPE(stash) < SVt_PVHV) { | |
ad64d0ec | 753 | packname = SvPV_const(MUTABLE_SV(stash), packname_len); |
5c284bb0 | 754 | stash = NULL; |
0dae17bd GS |
755 | } |
756 | else { | |
bfcb3514 | 757 | packname = HvNAME_get(stash); |
7423f6db | 758 | packname_len = HvNAMELEN_get(stash); |
0dae17bd GS |
759 | } |
760 | } | |
5c7983e5 | 761 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c | 762 | return NULL; |
dc848c6f | 763 | cv = GvCV(gv); |
764 | ||
adb5a9ae | 765 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 766 | return NULL; |
ed850460 | 767 | |
dc848c6f | 768 | /* |
769 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
770 | */ | |
041457d9 | 771 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
041457d9 | 772 | ) |
d1d15184 NC |
773 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
774 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", | |
775 | packname, (int)len, name); | |
44a8e56a | 776 | |
aed2304a | 777 | if (CvISXSUB(cv)) { |
adb5a9ae DM |
778 | /* rather than lookup/init $AUTOLOAD here |
779 | * only to have the XSUB do another lookup for $AUTOLOAD | |
780 | * and split that value on the last '::', | |
781 | * pass along the same data via some unused fields in the CV | |
782 | */ | |
783 | CvSTASH(cv) = stash; | |
4c74a7df DM |
784 | if (stash) |
785 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(cv)); | |
f880fe2f | 786 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 | 787 | SvCUR_set(cv, len); |
adb5a9ae DM |
788 | return gv; |
789 | } | |
adb5a9ae | 790 | |
44a8e56a | 791 | /* |
792 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
793 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
794 | * use that, but for lack of anything better we will use the sub's | |
795 | * original package to look up $AUTOLOAD. | |
796 | */ | |
797 | varstash = GvSTASH(CvGV(cv)); | |
5c7983e5 | 798 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
799 | ENTER; |
800 | ||
c69033f2 | 801 | if (!isGV(vargv)) { |
5c7983e5 | 802 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 | 803 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 804 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
805 | #endif |
806 | } | |
3d35f11b | 807 | LEAVE; |
e203899d | 808 | varsv = GvSVn(vargv); |
7423f6db | 809 | sv_setpvn(varsv, packname, packname_len); |
396482e1 | 810 | sv_catpvs(varsv, "::"); |
44a8e56a | 811 | sv_catpvn(varsv, name, len); |
a0d0e21e LW |
812 | return gv; |
813 | } | |
814 | ||
44a2ac75 YO |
815 | |
816 | /* require_tie_mod() internal routine for requiring a module | |
817 | * that implements the logic of automatical ties like %! and %- | |
818 | * | |
819 | * The "gv" parameter should be the glob. | |
45cbc99a RGS |
820 | * "varpv" holds the name of the var, used for error messages. |
821 | * "namesv" holds the module name. Its refcount will be decremented. | |
44a2ac75 | 822 | * "methpv" holds the method name to test for to check that things |
45cbc99a RGS |
823 | * are working reasonably close to as expected. |
824 | * "flags": if flag & 1 then save the scalar before loading. | |
44a2ac75 YO |
825 | * For the protection of $! to work (it is set by this routine) |
826 | * the sv slot must already be magicalized. | |
d2c93421 | 827 | */ |
44a2ac75 YO |
828 | STATIC HV* |
829 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) | |
d2c93421 | 830 | { |
27da23d5 | 831 | dVAR; |
da51bb9b | 832 | HV* stash = gv_stashsv(namesv, 0); |
45cbc99a | 833 | |
7918f24d NC |
834 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
835 | ||
44a2ac75 | 836 | if (!stash || !(gv_fetchmethod(stash, methpv))) { |
45cbc99a RGS |
837 | SV *module = newSVsv(namesv); |
838 | char varname = *varpv; /* varpv might be clobbered by load_module, | |
839 | so save it. For the moment it's always | |
840 | a single char. */ | |
d2c93421 | 841 | dSP; |
d2c93421 | 842 | ENTER; |
44a2ac75 | 843 | if ( flags & 1 ) |
45cbc99a | 844 | save_scalar(gv); |
cac54379 | 845 | PUSHSTACKi(PERLSI_MAGIC); |
45cbc99a | 846 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
cac54379 | 847 | POPSTACK; |
d2c93421 RH |
848 | LEAVE; |
849 | SPAGAIN; | |
da51bb9b | 850 | stash = gv_stashsv(namesv, 0); |
44a2ac75 | 851 | if (!stash) |
45cbc99a RGS |
852 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available", |
853 | varname, SVfARG(namesv)); | |
854 | else if (!gv_fetchmethod(stash, methpv)) | |
855 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s", | |
856 | varname, SVfARG(namesv), methpv); | |
d2c93421 | 857 | } |
45cbc99a | 858 | SvREFCNT_dec(namesv); |
44a2ac75 | 859 | return stash; |
d2c93421 RH |
860 | } |
861 | ||
954c1994 GS |
862 | /* |
863 | =for apidoc gv_stashpv | |
864 | ||
da51bb9b | 865 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 866 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
867 | |
868 | =cut | |
869 | */ | |
870 | ||
a0d0e21e | 871 | HV* |
864dbfa3 | 872 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 873 | { |
7918f24d | 874 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 875 | return gv_stashpvn(name, strlen(name), create); |
876 | } | |
877 | ||
bc96cb06 SH |
878 | /* |
879 | =for apidoc gv_stashpvn | |
880 | ||
da51bb9b NC |
881 | Returns a pointer to the stash for a specified package. The C<namelen> |
882 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
883 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
884 | created if it does not already exist. If the package does not exist and | |
885 | C<flags> is 0 (or any other setting that does not create packages) then NULL | |
886 | is returned. | |
887 | ||
bc96cb06 SH |
888 | |
889 | =cut | |
890 | */ | |
891 | ||
dc437b57 | 892 | HV* |
da51bb9b | 893 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 894 | { |
0cea0058 | 895 | char smallbuf[128]; |
46fc3d4c | 896 | char *tmpbuf; |
a0d0e21e LW |
897 | HV *stash; |
898 | GV *tmpgv; | |
add0ecde | 899 | U32 tmplen = namelen + 2; |
dc437b57 | 900 | |
7918f24d NC |
901 | PERL_ARGS_ASSERT_GV_STASHPVN; |
902 | ||
add0ecde | 903 | if (tmplen <= sizeof smallbuf) |
46fc3d4c | 904 | tmpbuf = smallbuf; |
905 | else | |
add0ecde VP |
906 | Newx(tmpbuf, tmplen, char); |
907 | Copy(name, tmpbuf, namelen, char); | |
908 | tmpbuf[namelen] = ':'; | |
909 | tmpbuf[namelen+1] = ':'; | |
910 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); | |
46fc3d4c | 911 | if (tmpbuf != smallbuf) |
912 | Safefree(tmpbuf); | |
a0d0e21e | 913 | if (!tmpgv) |
da51bb9b | 914 | return NULL; |
a0d0e21e LW |
915 | if (!GvHV(tmpgv)) |
916 | GvHV(tmpgv) = newHV(); | |
917 | stash = GvHV(tmpgv); | |
bfcb3514 | 918 | if (!HvNAME_get(stash)) |
51a37f80 | 919 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e | 920 | return stash; |
463ee0b2 LW |
921 | } |
922 | ||
954c1994 GS |
923 | /* |
924 | =for apidoc gv_stashsv | |
925 | ||
da51bb9b | 926 | Returns a pointer to the stash for a specified package. See C<gv_stashpvn>. |
954c1994 GS |
927 | |
928 | =cut | |
929 | */ | |
930 | ||
a0d0e21e | 931 | HV* |
da51bb9b | 932 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 933 | { |
dc437b57 | 934 | STRLEN len; |
9d4ba2ae | 935 | const char * const ptr = SvPV_const(sv,len); |
7918f24d NC |
936 | |
937 | PERL_ARGS_ASSERT_GV_STASHSV; | |
938 | ||
da51bb9b | 939 | return gv_stashpvn(ptr, len, flags); |
a0d0e21e LW |
940 | } |
941 | ||
942 | ||
463ee0b2 | 943 | GV * |
fe9845cc | 944 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) { |
7918f24d | 945 | PERL_ARGS_ASSERT_GV_FETCHPV; |
b7787f18 | 946 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
947 | } |
948 | ||
949 | GV * | |
fe9845cc | 950 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 951 | STRLEN len; |
9d4ba2ae | 952 | const char * const nambeg = SvPV_const(name, len); |
7918f24d | 953 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
954 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
955 | } | |
956 | ||
957 | GV * | |
958 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
fe9845cc | 959 | const svtype sv_type) |
79072805 | 960 | { |
97aff369 | 961 | dVAR; |
08105a92 | 962 | register const char *name = nambeg; |
c445ea15 | 963 | register GV *gv = NULL; |
79072805 | 964 | GV**gvp; |
79072805 | 965 | I32 len; |
b3d904f3 | 966 | register const char *name_cursor; |
c445ea15 | 967 | HV *stash = NULL; |
add2581e | 968 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a | 969 | const I32 no_expand = flags & GV_NOEXPAND; |
780a5241 | 970 | const I32 add = flags & ~GV_NOADD_MASK; |
b3d904f3 NC |
971 | const char *const name_end = nambeg + full_len; |
972 | const char *const name_em1 = name_end - 1; | |
5e0caaeb | 973 | U32 faking_it; |
79072805 | 974 | |
7918f24d NC |
975 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; |
976 | ||
fafc274c NC |
977 | if (flags & GV_NOTQUAL) { |
978 | /* Caller promised that there is no stash, so we can skip the check. */ | |
979 | len = full_len; | |
980 | goto no_stash; | |
981 | } | |
982 | ||
b208e10c NC |
983 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
984 | /* accidental stringify on a GV? */ | |
c07a80fd | 985 | name++; |
b208e10c | 986 | } |
c07a80fd | 987 | |
b3d904f3 NC |
988 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
989 | if ((*name_cursor == ':' && name_cursor < name_em1 | |
990 | && name_cursor[1] == ':') | |
991 | || (*name_cursor == '\'' && name_cursor[1])) | |
463ee0b2 | 992 | { |
463ee0b2 | 993 | if (!stash) |
3280af22 | 994 | stash = PL_defstash; |
dc437b57 | 995 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c | 996 | return NULL; |
463ee0b2 | 997 | |
b3d904f3 | 998 | len = name_cursor - name; |
85e6fe83 | 999 | if (len > 0) { |
0cea0058 | 1000 | char smallbuf[128]; |
62b57502 | 1001 | char *tmpbuf; |
62b57502 | 1002 | |
798b63bc | 1003 | if (len + 2 <= (I32)sizeof (smallbuf)) |
3c78fafa | 1004 | tmpbuf = smallbuf; |
62b57502 | 1005 | else |
2ae0db35 | 1006 | Newx(tmpbuf, len+2, char); |
a0d0e21e LW |
1007 | Copy(name, tmpbuf, len, char); |
1008 | tmpbuf[len++] = ':'; | |
1009 | tmpbuf[len++] = ':'; | |
463ee0b2 | 1010 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
a0714e2c | 1011 | gv = gvp ? *gvp : NULL; |
159b6efe | 1012 | if (gv && gv != (const GV *)&PL_sv_undef) { |
6fa846a0 | 1013 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 | 1014 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 GS |
1015 | else |
1016 | GvMULTI_on(gv); | |
1017 | } | |
3c78fafa | 1018 | if (tmpbuf != smallbuf) |
62b57502 | 1019 | Safefree(tmpbuf); |
159b6efe | 1020 | if (!gv || gv == (const GV *)&PL_sv_undef) |
a0714e2c | 1021 | return NULL; |
85e6fe83 | 1022 | |
463ee0b2 LW |
1023 | if (!(stash = GvHV(gv))) |
1024 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 1025 | |
bfcb3514 | 1026 | if (!HvNAME_get(stash)) |
b3d904f3 | 1027 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); |
463ee0b2 LW |
1028 | } |
1029 | ||
b3d904f3 NC |
1030 | if (*name_cursor == ':') |
1031 | name_cursor++; | |
1032 | name_cursor++; | |
1033 | name = name_cursor; | |
ad6bfa9d | 1034 | if (name == name_end) |
159b6efe NC |
1035 | return gv |
1036 | ? gv : MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); | |
79072805 | 1037 | } |
79072805 | 1038 | } |
b3d904f3 | 1039 | len = name_cursor - name; |
463ee0b2 LW |
1040 | |
1041 | /* No stash in name, so see how we can default */ | |
1042 | ||
1043 | if (!stash) { | |
fafc274c | 1044 | no_stash: |
8ccce9ae | 1045 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c | 1046 | bool global = FALSE; |
1047 | ||
8ccce9ae NC |
1048 | switch (len) { |
1049 | case 1: | |
18ea00d7 | 1050 | if (*name == '_') |
9d116dd7 | 1051 | global = TRUE; |
18ea00d7 | 1052 | break; |
8ccce9ae NC |
1053 | case 3: |
1054 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1055 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1056 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
9d116dd7 | 1057 | global = TRUE; |
18ea00d7 | 1058 | break; |
8ccce9ae NC |
1059 | case 4: |
1060 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1061 | && name[3] == 'V') | |
9d116dd7 | 1062 | global = TRUE; |
18ea00d7 | 1063 | break; |
8ccce9ae NC |
1064 | case 5: |
1065 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1066 | && name[3] == 'I' && name[4] == 'N') | |
463ee0b2 | 1067 | global = TRUE; |
18ea00d7 | 1068 | break; |
8ccce9ae NC |
1069 | case 6: |
1070 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1071 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1072 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
1073 | global = TRUE; | |
1074 | break; | |
1075 | case 7: | |
1076 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1077 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1078 | && name[6] == 'T') | |
18ea00d7 NC |
1079 | global = TRUE; |
1080 | break; | |
463ee0b2 | 1081 | } |
9607fc9c | 1082 | |
463ee0b2 | 1083 | if (global) |
3280af22 | 1084 | stash = PL_defstash; |
923e4eb5 | 1085 | else if (IN_PERL_COMPILETIME) { |
3280af22 NIS |
1086 | stash = PL_curstash; |
1087 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
748a9306 LW |
1088 | sv_type != SVt_PVCV && |
1089 | sv_type != SVt_PVGV && | |
4633a7c4 | 1090 | sv_type != SVt_PVFM && |
c07a80fd | 1091 | sv_type != SVt_PVIO && |
70ec6265 NC |
1092 | !(len == 1 && sv_type == SVt_PV && |
1093 | (*name == 'a' || *name == 'b')) ) | |
748a9306 | 1094 | { |
4633a7c4 LW |
1095 | gvp = (GV**)hv_fetch(stash,name,len,0); |
1096 | if (!gvp || | |
159b6efe | 1097 | *gvp == (const GV *)&PL_sv_undef || |
a5f75d66 AD |
1098 | SvTYPE(*gvp) != SVt_PVGV) |
1099 | { | |
d4c19fe8 | 1100 | stash = NULL; |
a5f75d66 | 1101 | } |
155aba94 GS |
1102 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
1103 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1104 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
4633a7c4 | 1105 | { |
fe13d51d | 1106 | /* diag_listed_as: Variable "%s" is not imported%s */ |
413ff9f6 FC |
1107 | Perl_ck_warner_d( |
1108 | aTHX_ packWARN(WARN_MISC), | |
1109 | "Variable \"%c%s\" is not imported", | |
4633a7c4 LW |
1110 | sv_type == SVt_PVAV ? '@' : |
1111 | sv_type == SVt_PVHV ? '%' : '$', | |
1112 | name); | |
8ebc5c01 | 1113 | if (GvCVu(*gvp)) |
413ff9f6 FC |
1114 | Perl_ck_warner_d( |
1115 | aTHX_ packWARN(WARN_MISC), | |
1116 | "\t(Did you mean &%s instead?)\n", name | |
1117 | ); | |
d4c19fe8 | 1118 | stash = NULL; |
4633a7c4 | 1119 | } |
a0d0e21e | 1120 | } |
85e6fe83 | 1121 | } |
463ee0b2 | 1122 | else |
1d7c1841 | 1123 | stash = CopSTASH(PL_curcop); |
463ee0b2 LW |
1124 | } |
1125 | else | |
3280af22 | 1126 | stash = PL_defstash; |
463ee0b2 LW |
1127 | } |
1128 | ||
1129 | /* By this point we should have a stash and a name */ | |
1130 | ||
a0d0e21e | 1131 | if (!stash) { |
5a844595 | 1132 | if (add) { |
9d4ba2ae | 1133 | SV * const err = Perl_mess(aTHX_ |
5a844595 GS |
1134 | "Global symbol \"%s%s\" requires explicit package name", |
1135 | (sv_type == SVt_PV ? "$" | |
1136 | : sv_type == SVt_PVAV ? "@" | |
1137 | : sv_type == SVt_PVHV ? "%" | |
608b3986 | 1138 | : ""), name); |
e7f343b6 | 1139 | GV *gv; |
608b3986 AE |
1140 | if (USE_UTF8_IN_NAMES) |
1141 | SvUTF8_on(err); | |
1142 | qerror(err); | |
76f68e9b | 1143 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
e7f343b6 NC |
1144 | if(!gv) { |
1145 | /* symbol table under destruction */ | |
1146 | return NULL; | |
1147 | } | |
1148 | stash = GvHV(gv); | |
a0d0e21e | 1149 | } |
d7aacf4e | 1150 | else |
a0714e2c | 1151 | return NULL; |
a0d0e21e LW |
1152 | } |
1153 | ||
1154 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
a0714e2c | 1155 | return NULL; |
a0d0e21e | 1156 | |
79072805 | 1157 | gvp = (GV**)hv_fetch(stash,name,len,add); |
159b6efe | 1158 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) |
a0714e2c | 1159 | return NULL; |
79072805 LW |
1160 | gv = *gvp; |
1161 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e | 1162 | if (add) { |
a5f75d66 | 1163 | GvMULTI_on(gv); |
a0d0e21e | 1164 | gv_init_sv(gv, sv_type); |
45cbc99a | 1165 | if (len == 1 && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) { |
44a2ac75 YO |
1166 | if (*name == '!') |
1167 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); | |
45cbc99a | 1168 | else if (*name == '-' || *name == '+') |
192b9cd1 | 1169 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
45cbc99a | 1170 | } |
a0d0e21e | 1171 | } |
79072805 | 1172 | return gv; |
add2581e | 1173 | } else if (no_init) { |
55d729e4 | 1174 | return gv; |
e26df76a NC |
1175 | } else if (no_expand && SvROK(gv)) { |
1176 | return gv; | |
79072805 | 1177 | } |
93a17b20 | 1178 | |
5e0caaeb NC |
1179 | /* Adding a new symbol. |
1180 | Unless of course there was already something non-GV here, in which case | |
1181 | we want to behave as if there was always a GV here, containing some sort | |
1182 | of subroutine. | |
1183 | Otherwise we run the risk of creating things like GvIO, which can cause | |
1184 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
1185 | ||
1186 | faking_it = SvOK(gv); | |
93a17b20 | 1187 | |
9b387841 NC |
1188 | if (add & GV_ADDWARN) |
1189 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); | |
55d729e4 | 1190 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
5e0caaeb | 1191 | gv_init_sv(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 | 1192 | |
a0288114 | 1193 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d | 1194 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 PM |
1195 | GvMULTI_on(gv) ; |
1196 | ||
93a17b20 | 1197 | /* set up magic where warranted */ |
cc4c2da6 | 1198 | if (len > 1) { |
9431620d | 1199 | #ifndef EBCDIC |
cc4c2da6 | 1200 | if (*name > 'V' ) { |
6f207bd3 | 1201 | NOOP; |
cc4c2da6 | 1202 | /* Nothing else to do. |
91f565cb | 1203 | The compiler will probably turn the switch statement into a |
cc4c2da6 NC |
1204 | branch table. Make sure we avoid even that small overhead for |
1205 | the common case of lower case variable names. */ | |
9431620d NC |
1206 | } else |
1207 | #endif | |
1208 | { | |
b464bac0 | 1209 | const char * const name2 = name + 1; |
cc4c2da6 NC |
1210 | switch (*name) { |
1211 | case 'A': | |
1212 | if (strEQ(name2, "RGV")) { | |
1213 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
1214 | } | |
7b8203e3 YST |
1215 | else if (strEQ(name2, "RGVOUT")) { |
1216 | GvMULTI_on(gv); | |
1217 | } | |
cc4c2da6 NC |
1218 | break; |
1219 | case 'E': | |
1220 | if (strnEQ(name2, "XPORT", 5)) | |
1221 | GvMULTI_on(gv); | |
1222 | break; | |
1223 | case 'I': | |
1224 | if (strEQ(name2, "SA")) { | |
9d4ba2ae | 1225 | AV* const av = GvAVn(gv); |
cc4c2da6 | 1226 | GvMULTI_on(gv); |
ad64d0ec NC |
1227 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, |
1228 | NULL, 0); | |
cc4c2da6 NC |
1229 | /* NOTE: No support for tied ISA */ |
1230 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") | |
1231 | && AvFILLp(av) == -1) | |
1232 | { | |
e84ce9a2 MHM |
1233 | av_push(av, newSVpvs("NDBM_File")); |
1234 | gv_stashpvs("NDBM_File", GV_ADD); | |
1235 | av_push(av, newSVpvs("DB_File")); | |
1236 | gv_stashpvs("DB_File", GV_ADD); | |
1237 | av_push(av, newSVpvs("GDBM_File")); | |
1238 | gv_stashpvs("GDBM_File", GV_ADD); | |
1239 | av_push(av, newSVpvs("SDBM_File")); | |
1240 | gv_stashpvs("SDBM_File", GV_ADD); | |
1241 | av_push(av, newSVpvs("ODBM_File")); | |
1242 | gv_stashpvs("ODBM_File", GV_ADD); | |
cc4c2da6 NC |
1243 | } |
1244 | } | |
1245 | break; | |
1246 | case 'O': | |
1247 | if (strEQ(name2, "VERLOAD")) { | |
9d4ba2ae | 1248 | HV* const hv = GvHVn(gv); |
cc4c2da6 | 1249 | GvMULTI_on(gv); |
a0714e2c | 1250 | hv_magic(hv, NULL, PERL_MAGIC_overload); |
cc4c2da6 NC |
1251 | } |
1252 | break; | |
1253 | case 'S': | |
1254 | if (strEQ(name2, "IG")) { | |
1255 | HV *hv; | |
1256 | I32 i; | |
d525a7b2 NC |
1257 | if (!PL_psig_name) { |
1258 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); | |
a02a5408 | 1259 | Newxz(PL_psig_pend, SIG_SIZE, int); |
d525a7b2 | 1260 | PL_psig_ptr = PL_psig_name + SIG_SIZE; |
0bdedcb3 NC |
1261 | } else { |
1262 | /* I think that the only way to get here is to re-use an | |
1263 | embedded perl interpreter, where the previous | |
1264 | use didn't clean up fully because | |
1265 | PL_perl_destruct_level was 0. I'm not sure that we | |
1266 | "support" that, in that I suspect in that scenario | |
1267 | there are sufficient other garbage values left in the | |
1268 | interpreter structure that something else will crash | |
1269 | before we get here. I suspect that this is one of | |
1270 | those "doctor, it hurts when I do this" bugs. */ | |
d525a7b2 | 1271 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); |
0bdedcb3 | 1272 | Zero(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 NC |
1273 | } |
1274 | GvMULTI_on(gv); | |
1275 | hv = GvHVn(gv); | |
a0714e2c | 1276 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 1277 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 1278 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
1279 | if (init) |
1280 | sv_setsv(*init, &PL_sv_undef); | |
cc4c2da6 NC |
1281 | } |
1282 | } | |
1283 | break; | |
1284 | case 'V': | |
1285 | if (strEQ(name2, "ERSION")) | |
1286 | GvMULTI_on(gv); | |
1287 | break; | |
e5218da5 GA |
1288 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1289 | if (strEQ(name2, "HILD_ERROR_NATIVE")) | |
1290 | goto magicalize; | |
1291 | break; | |
cc4c2da6 NC |
1292 | case '\005': /* $^ENCODING */ |
1293 | if (strEQ(name2, "NCODING")) | |
1294 | goto magicalize; | |
1295 | break; | |
cde0cee5 YO |
1296 | case '\015': /* $^MATCH */ |
1297 | if (strEQ(name2, "ATCH")) | |
2fdbfb4d | 1298 | goto magicalize; |
cc4c2da6 NC |
1299 | case '\017': /* $^OPEN */ |
1300 | if (strEQ(name2, "PEN")) | |
1301 | goto magicalize; | |
1302 | break; | |
cde0cee5 YO |
1303 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
1304 | if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH")) | |
2fdbfb4d | 1305 | goto magicalize; |
cc4c2da6 NC |
1306 | case '\024': /* ${^TAINT} */ |
1307 | if (strEQ(name2, "AINT")) | |
1308 | goto ro_magicalize; | |
1309 | break; | |
7cebcbc0 | 1310 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 | 1311 | if (strEQ(name2, "NICODE")) |
cc4c2da6 | 1312 | goto ro_magicalize; |
a0288114 | 1313 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 | 1314 | goto ro_magicalize; |
e07ea26a NC |
1315 | if (strEQ(name2, "TF8CACHE")) |
1316 | goto magicalize; | |
cc4c2da6 NC |
1317 | break; |
1318 | case '\027': /* $^WARNING_BITS */ | |
1319 | if (strEQ(name2, "ARNING_BITS")) | |
1320 | goto magicalize; | |
1321 | break; | |
1322 | case '1': | |
1323 | case '2': | |
1324 | case '3': | |
1325 | case '4': | |
1326 | case '5': | |
1327 | case '6': | |
1328 | case '7': | |
1329 | case '8': | |
1330 | case '9': | |
85e6fe83 | 1331 | { |
2fdbfb4d AB |
1332 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
1333 | this test */ | |
1334 | /* This snippet is taken from is_gv_magical */ | |
cc4c2da6 NC |
1335 | const char *end = name + len; |
1336 | while (--end > name) { | |
2fdbfb4d | 1337 | if (!isDIGIT(*end)) return gv; |
cc4c2da6 | 1338 | } |
2fdbfb4d | 1339 | goto magicalize; |
1d7c1841 | 1340 | } |
dc437b57 | 1341 | } |
93a17b20 | 1342 | } |
392db708 NC |
1343 | } else { |
1344 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
1345 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 | 1346 | switch (*name) { |
6361f656 AB |
1347 | case '&': /* $& */ |
1348 | case '`': /* $` */ | |
1349 | case '\'': /* $' */ | |
cc4c2da6 NC |
1350 | if ( |
1351 | sv_type == SVt_PVAV || | |
1352 | sv_type == SVt_PVHV || | |
1353 | sv_type == SVt_PVCV || | |
1354 | sv_type == SVt_PVFM || | |
1355 | sv_type == SVt_PVIO | |
1356 | ) { break; } | |
1357 | PL_sawampersand = TRUE; | |
2fdbfb4d | 1358 | goto magicalize; |
cc4c2da6 | 1359 | |
6361f656 | 1360 | case ':': /* $: */ |
c69033f2 | 1361 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
1362 | goto magicalize; |
1363 | ||
6361f656 | 1364 | case '?': /* $? */ |
ff0cee69 | 1365 | #ifdef COMPLEX_STATUS |
c69033f2 | 1366 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 1367 | #endif |
cc4c2da6 | 1368 | goto magicalize; |
ff0cee69 | 1369 | |
6361f656 | 1370 | case '!': /* $! */ |
67261566 | 1371 | GvMULTI_on(gv); |
44a2ac75 | 1372 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 1373 | |
ad64d0ec | 1374 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 | 1375 | |
44a2ac75 | 1376 | /* magicalization must be done before require_tie_mod is called */ |
67261566 | 1377 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
44a2ac75 | 1378 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
d2c93421 | 1379 | |
6cef1e77 | 1380 | break; |
6361f656 AB |
1381 | case '-': /* $- */ |
1382 | case '+': /* $+ */ | |
44a2ac75 YO |
1383 | GvMULTI_on(gv); /* no used once warnings here */ |
1384 | { | |
44a2ac75 | 1385 | AV* const av = GvAVn(gv); |
ad64d0ec | 1386 | SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL; |
44a2ac75 | 1387 | |
ad64d0ec NC |
1388 | sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0); |
1389 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
67261566 | 1390 | if (avc) |
44a2ac75 | 1391 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 | 1392 | SvREADONLY_on(av); |
67261566 YO |
1393 | |
1394 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
192b9cd1 | 1395 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
67261566 | 1396 | |
80305961 | 1397 | break; |
cc4c2da6 | 1398 | } |
6361f656 AB |
1399 | case '*': /* $* */ |
1400 | case '#': /* $# */ | |
9b387841 NC |
1401 | if (sv_type == SVt_PV) |
1402 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), | |
1403 | "$%c is no longer supported", *name); | |
8ae1fe26 | 1404 | break; |
6361f656 | 1405 | case '|': /* $| */ |
c69033f2 | 1406 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 NC |
1407 | goto magicalize; |
1408 | ||
b3ca2e83 NC |
1409 | case '\010': /* $^H */ |
1410 | { | |
1411 | HV *const hv = GvHVn(gv); | |
1412 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
1413 | } | |
1414 | goto magicalize; | |
cc4c2da6 | 1415 | case '\023': /* $^S */ |
2fdbfb4d AB |
1416 | ro_magicalize: |
1417 | SvREADONLY_on(GvSVn(gv)); | |
1418 | /* FALL THROUGH */ | |
6361f656 AB |
1419 | case '0': /* $0 */ |
1420 | case '1': /* $1 */ | |
1421 | case '2': /* $2 */ | |
1422 | case '3': /* $3 */ | |
1423 | case '4': /* $4 */ | |
1424 | case '5': /* $5 */ | |
1425 | case '6': /* $6 */ | |
1426 | case '7': /* $7 */ | |
1427 | case '8': /* $8 */ | |
1428 | case '9': /* $9 */ | |
1429 | case '[': /* $[ */ | |
1430 | case '^': /* $^ */ | |
1431 | case '~': /* $~ */ | |
1432 | case '=': /* $= */ | |
1433 | case '%': /* $% */ | |
1434 | case '.': /* $. */ | |
1435 | case '(': /* $( */ | |
1436 | case ')': /* $) */ | |
1437 | case '<': /* $< */ | |
1438 | case '>': /* $> */ | |
1439 | case '\\': /* $\ */ | |
1440 | case '/': /* $/ */ | |
cc4c2da6 NC |
1441 | case '\001': /* $^A */ |
1442 | case '\003': /* $^C */ | |
1443 | case '\004': /* $^D */ | |
1444 | case '\005': /* $^E */ | |
1445 | case '\006': /* $^F */ | |
cc4c2da6 NC |
1446 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1447 | case '\016': /* $^N */ | |
1448 | case '\017': /* $^O */ | |
1449 | case '\020': /* $^P */ | |
1450 | case '\024': /* $^T */ | |
1451 | case '\027': /* $^W */ | |
1452 | magicalize: | |
ad64d0ec | 1453 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
cc4c2da6 | 1454 | break; |
e521374c | 1455 | |
cc4c2da6 | 1456 | case '\014': /* $^L */ |
76f68e9b | 1457 | sv_setpvs(GvSVn(gv),"\f"); |
c69033f2 | 1458 | PL_formfeed = GvSVn(gv); |
463ee0b2 | 1459 | break; |
6361f656 | 1460 | case ';': /* $; */ |
76f68e9b | 1461 | sv_setpvs(GvSVn(gv),"\034"); |
463ee0b2 | 1462 | break; |
6361f656 | 1463 | case ']': /* $] */ |
cc4c2da6 | 1464 | { |
c69033f2 | 1465 | SV * const sv = GvSVn(gv); |
d7aa5382 | 1466 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 1467 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
1468 | GvSV(gv) = vnumify(PL_patchlevel); |
1469 | SvREADONLY_on(GvSV(gv)); | |
1470 | SvREFCNT_dec(sv); | |
93a17b20 LW |
1471 | } |
1472 | break; | |
cc4c2da6 NC |
1473 | case '\026': /* $^V */ |
1474 | { | |
c69033f2 | 1475 | SV * const sv = GvSVn(gv); |
f9be5ac8 DM |
1476 | GvSV(gv) = new_version(PL_patchlevel); |
1477 | SvREADONLY_on(GvSV(gv)); | |
1478 | SvREFCNT_dec(sv); | |
16070b82 GS |
1479 | } |
1480 | break; | |
cc4c2da6 | 1481 | } |
79072805 | 1482 | } |
93a17b20 | 1483 | return gv; |
79072805 LW |
1484 | } |
1485 | ||
1486 | void | |
35a4481c | 1487 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1488 | { |
35a4481c | 1489 | const char *name; |
7423f6db | 1490 | STRLEN namelen; |
35a4481c | 1491 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
1492 | |
1493 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
1494 | ||
43693395 | 1495 | if (!hv) { |
0c34ef67 | 1496 | SvOK_off(sv); |
43693395 GS |
1497 | return; |
1498 | } | |
666ea192 | 1499 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 1500 | |
bfcb3514 | 1501 | name = HvNAME_get(hv); |
7423f6db NC |
1502 | if (name) { |
1503 | namelen = HvNAMELEN_get(hv); | |
1504 | } else { | |
e27ad1f2 | 1505 | name = "__ANON__"; |
7423f6db NC |
1506 | namelen = 8; |
1507 | } | |
a0288114 | 1508 | |
e27ad1f2 | 1509 | if (keepmain || strNE(name, "main")) { |
7423f6db | 1510 | sv_catpvn(sv,name,namelen); |
396482e1 | 1511 | sv_catpvs(sv,"::"); |
43693395 | 1512 | } |
257984c0 | 1513 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 GS |
1514 | } |
1515 | ||
1516 | void | |
35a4481c | 1517 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1518 | { |
099be4f1 | 1519 | const GV * const egv = GvEGVx(gv); |
7918f24d NC |
1520 | |
1521 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
1522 | ||
46c461b5 | 1523 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
1524 | } |
1525 | ||
79072805 | 1526 | void |
1146e912 | 1527 | Perl_gv_check(pTHX_ const HV *stash) |
79072805 | 1528 | { |
97aff369 | 1529 | dVAR; |
79072805 | 1530 | register I32 i; |
463ee0b2 | 1531 | |
7918f24d NC |
1532 | PERL_ARGS_ASSERT_GV_CHECK; |
1533 | ||
8990e307 LW |
1534 | if (!HvARRAY(stash)) |
1535 | return; | |
a0d0e21e | 1536 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 1537 | const HE *entry; |
dc437b57 | 1538 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 AL |
1539 | register GV *gv; |
1540 | HV *hv; | |
dc437b57 | 1541 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
159b6efe | 1542 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 1543 | { |
19b6c847 | 1544 | if (hv != PL_defstash && hv != stash) |
a0d0e21e LW |
1545 | gv_check(hv); /* nested package */ |
1546 | } | |
dc437b57 | 1547 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 | 1548 | const char *file; |
159b6efe | 1549 | gv = MUTABLE_GV(HeVAL(entry)); |
55d729e4 | 1550 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 1551 | continue; |
1d7c1841 | 1552 | file = GvFILE(gv); |
1d7c1841 GS |
1553 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1554 | #ifdef USE_ITHREADS | |
dd374669 | 1555 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 | 1556 | #else |
9bde8eb0 NC |
1557 | CopFILEGV(PL_curcop) |
1558 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
1d7c1841 | 1559 | #endif |
9014280d | 1560 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 | 1561 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 | 1562 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 | 1563 | } |
79072805 LW |
1564 | } |
1565 | } | |
1566 | } | |
1567 | ||
1568 | GV * | |
e1ec3a88 | 1569 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 | 1570 | { |
97aff369 | 1571 | dVAR; |
7918f24d NC |
1572 | |
1573 | PERL_ARGS_ASSERT_NEWGVGEN; | |
1574 | ||
cea2e8a9 | 1575 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 | 1576 | GV_ADD, SVt_PVGV); |
79072805 LW |
1577 | } |
1578 | ||
1579 | /* hopefully this is only called on local symbol table entries */ | |
1580 | ||
1581 | GP* | |
864dbfa3 | 1582 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 1583 | { |
97aff369 | 1584 | dVAR; |
1d7c1841 | 1585 | if (!gp) |
d4c19fe8 | 1586 | return NULL; |
79072805 | 1587 | gp->gp_refcnt++; |
44a8e56a | 1588 | if (gp->gp_cv) { |
1589 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
1590 | /* If the GP they asked for a reference to contains |
1591 | a method cache entry, clear it first, so that we | |
1592 | don't infect them with our cached entry */ | |
44a8e56a | 1593 | SvREFCNT_dec(gp->gp_cv); |
601f1833 | 1594 | gp->gp_cv = NULL; |
44a8e56a | 1595 | gp->gp_cvgen = 0; |
1596 | } | |
44a8e56a | 1597 | } |
79072805 | 1598 | return gp; |
79072805 LW |
1599 | } |
1600 | ||
1601 | void | |
864dbfa3 | 1602 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 1603 | { |
97aff369 | 1604 | dVAR; |
79072805 LW |
1605 | GP* gp; |
1606 | ||
f7877b28 | 1607 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 1608 | return; |
f248d071 | 1609 | if (gp->gp_refcnt == 0) { |
9b387841 NC |
1610 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
1611 | "Attempt to free unreferenced glob pointers" | |
1612 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
1613 | return; |
1614 | } | |
748a9306 LW |
1615 | if (--gp->gp_refcnt > 0) { |
1616 | if (gp->gp_egv == gv) | |
1617 | gp->gp_egv = 0; | |
dd38834b | 1618 | GvGP(gv) = 0; |
79072805 | 1619 | return; |
748a9306 | 1620 | } |
79072805 | 1621 | |
c9ce39a9 RGS |
1622 | if (gp->gp_file_hek) |
1623 | unshare_hek(gp->gp_file_hek); | |
c9da69fb AL |
1624 | SvREFCNT_dec(gp->gp_sv); |
1625 | SvREFCNT_dec(gp->gp_av); | |
bfcb3514 NC |
1626 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1627 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
1628 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { | |
bfcb3514 NC |
1629 | const char *hvname = HvNAME_get(gp->gp_hv); |
1630 | if (PL_stashcache && hvname) | |
04fe65b0 | 1631 | (void)hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
7423f6db | 1632 | G_DISCARD); |
bfcb3514 | 1633 | SvREFCNT_dec(gp->gp_hv); |
13207a71 | 1634 | } |
c9da69fb AL |
1635 | SvREFCNT_dec(gp->gp_io); |
1636 | SvREFCNT_dec(gp->gp_cv); | |
1637 | SvREFCNT_dec(gp->gp_form); | |
748a9306 | 1638 | |
79072805 LW |
1639 | Safefree(gp); |
1640 | GvGP(gv) = 0; | |
1641 | } | |
1642 | ||
d460ef45 NIS |
1643 | int |
1644 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
1645 | { | |
53c1dcc0 AL |
1646 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1647 | PERL_UNUSED_ARG(sv); | |
dd374669 | 1648 | |
7918f24d NC |
1649 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
1650 | ||
d460ef45 NIS |
1651 | if (amtp && AMT_AMAGIC(amtp)) { |
1652 | int i; | |
1653 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 1654 | CV * const cv = amtp->table[i]; |
b37c2d43 | 1655 | if (cv) { |
ad64d0ec | 1656 | SvREFCNT_dec(MUTABLE_SV(cv)); |
601f1833 | 1657 | amtp->table[i] = NULL; |
d460ef45 NIS |
1658 | } |
1659 | } | |
1660 | } | |
1661 | return 0; | |
1662 | } | |
1663 | ||
a0d0e21e | 1664 | /* Updates and caches the CV's */ |
c3a9a790 RGS |
1665 | /* Returns: |
1666 | * 1 on success and there is some overload | |
1667 | * 0 if there is no overload | |
1668 | * -1 if some error occurred and it couldn't croak | |
1669 | */ | |
a0d0e21e | 1670 | |
c3a9a790 | 1671 | int |
242f8760 | 1672 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e | 1673 | { |
97aff369 | 1674 | dVAR; |
ad64d0ec | 1675 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 | 1676 | AMT amt; |
9b439311 | 1677 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 1678 | U32 newgen; |
a0d0e21e | 1679 | |
7918f24d NC |
1680 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
1681 | ||
9b439311 | 1682 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
1683 | if (mg) { |
1684 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
1685 | if (amtp->was_ok_am == PL_amagic_generation | |
e1a479c5 | 1686 | && amtp->was_ok_sub == newgen) { |
c3a9a790 | 1687 | return AMT_OVERLOADED(amtp) ? 1 : 0; |
14899595 | 1688 | } |
ad64d0ec | 1689 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 | 1690 | } |
a0d0e21e | 1691 | |
bfcb3514 | 1692 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 1693 | |
d460ef45 | 1694 | Zero(&amt,1,AMT); |
3280af22 | 1695 | amt.was_ok_am = PL_amagic_generation; |
e1a479c5 | 1696 | amt.was_ok_sub = newgen; |
a6006777 | 1697 | amt.fallback = AMGfallNO; |
1698 | amt.flags = 0; | |
1699 | ||
a6006777 | 1700 | { |
32251b26 IZ |
1701 | int filled = 0, have_ovl = 0; |
1702 | int i, lim = 1; | |
a6006777 | 1703 | |
22c35a8c | 1704 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 1705 | |
89ffc314 | 1706 | /* Try to find via inheritance. */ |
53c1dcc0 AL |
1707 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1708 | SV * const sv = gv ? GvSV(gv) : NULL; | |
1709 | CV* cv; | |
89ffc314 IZ |
1710 | |
1711 | if (!gv) | |
32251b26 | 1712 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 NC |
1713 | #ifdef PERL_DONT_CREATE_GVSV |
1714 | else if (!sv) { | |
6f207bd3 | 1715 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 NC |
1716 | } |
1717 | #endif | |
89ffc314 IZ |
1718 | else if (SvTRUE(sv)) |
1719 | amt.fallback=AMGfallYES; | |
1720 | else if (SvOK(sv)) | |
1721 | amt.fallback=AMGfallNEVER; | |
a6006777 | 1722 | |
32251b26 | 1723 | for (i = 1; i < lim; i++) |
601f1833 | 1724 | amt.table[i] = NULL; |
32251b26 | 1725 | for (; i < NofAMmeth; i++) { |
6136c704 | 1726 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 1727 | /* Human-readable form, for debugging: */ |
6136c704 | 1728 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
d279ab82 | 1729 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 | 1730 | |
a0288114 | 1731 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 1732 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
1733 | /* don't fill the cache while looking up! |
1734 | Creation of inheritance stubs in intermediate packages may | |
1735 | conflict with the logic of runtime method substitution. | |
1736 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
1737 | then we could have created stubs for "(+0" in A and C too. | |
1738 | But if B overloads "bool", we may want to use it for | |
1739 | numifying instead of C's "+0". */ | |
1740 | if (i >= DESTROY_amg) | |
1741 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); | |
1742 | else /* Autoload taken care of below */ | |
1743 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); | |
46fc3d4c | 1744 | cv = 0; |
89ffc314 | 1745 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 | 1746 | const char *hvname; |
44a8e56a | 1747 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 | 1748 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 IZ |
1749 | /* This is a hack to support autoloading..., while |
1750 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 1751 | /* GvSV contains the name of the method. */ |
6136c704 | 1752 | GV *ngv = NULL; |
c69033f2 | 1753 | SV *gvsv = GvSV(gv); |
a0288114 AL |
1754 | |
1755 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
1756 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
ca0270c4 | 1757 | (void*)GvSV(gv), cp, hvname) ); |
c69033f2 NC |
1758 | if (!gvsv || !SvPOK(gvsv) |
1759 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), | |
dc848c6f | 1760 | FALSE))) |
1761 | { | |
a0288114 | 1762 | /* Can be an import stub (created by "can"). */ |
242f8760 | 1763 | if (destructing) { |
c3a9a790 | 1764 | return -1; |
242f8760 RGS |
1765 | } |
1766 | else { | |
1767 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; | |
1768 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ | |
1769 | "in package \"%.256s\"", | |
1770 | (GvCVGEN(gv) ? "Stub found while resolving" | |
1771 | : "Can't resolve"), | |
1772 | name, cp, hvname); | |
1773 | } | |
44a8e56a | 1774 | } |
dc848c6f | 1775 | cv = GvCV(gv = ngv); |
44a8e56a | 1776 | } |
b464bac0 | 1777 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 1778 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 1779 | GvNAME(CvGV(cv))) ); |
1780 | filled = 1; | |
32251b26 IZ |
1781 | if (i < DESTROY_amg) |
1782 | have_ovl = 1; | |
611c1e95 | 1783 | } else if (gv) { /* Autoloaded... */ |
ea726b52 | 1784 | cv = MUTABLE_CV(gv); |
611c1e95 | 1785 | filled = 1; |
44a8e56a | 1786 | } |
ea726b52 | 1787 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); |
a0d0e21e | 1788 | } |
a0d0e21e | 1789 | if (filled) { |
a6006777 | 1790 | AMT_AMAGIC_on(&amt); |
32251b26 IZ |
1791 | if (have_ovl) |
1792 | AMT_OVERLOADED_on(&amt); | |
ad64d0ec | 1793 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 1794 | (char*)&amt, sizeof(AMT)); |
32251b26 | 1795 | return have_ovl; |
a0d0e21e LW |
1796 | } |
1797 | } | |
a6006777 | 1798 | /* Here we have no table: */ |
9cbac4c7 | 1799 | /* no_table: */ |
a6006777 | 1800 | AMT_AMAGIC_off(&amt); |
ad64d0ec | 1801 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 1802 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 | 1803 | return 0; |
a0d0e21e LW |
1804 | } |
1805 | ||
32251b26 IZ |
1806 | |
1807 | CV* | |
1808 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
1809 | { | |
97aff369 | 1810 | dVAR; |
3f8f4626 | 1811 | MAGIC *mg; |
32251b26 | 1812 | AMT *amtp; |
e1a479c5 | 1813 | U32 newgen; |
9b439311 | 1814 | struct mro_meta* stash_meta; |
32251b26 | 1815 | |
bfcb3514 | 1816 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 1817 | return NULL; |
e1a479c5 | 1818 | |
9b439311 BB |
1819 | stash_meta = HvMROMETA(stash); |
1820 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 1821 | |
ad64d0ec | 1822 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
1823 | if (!mg) { |
1824 | do_update: | |
242f8760 RGS |
1825 | /* If we're looking up a destructor to invoke, we must avoid |
1826 | * that Gv_AMupdate croaks, because we might be dying already */ | |
c3a9a790 | 1827 | if (Gv_AMupdate(stash, id == DESTROY_amg) == -1) { |
242f8760 RGS |
1828 | /* and if it didn't found a destructor, we fall back |
1829 | * to a simpler method that will only look for the | |
1830 | * destructor instead of the whole magic */ | |
1831 | if (id == DESTROY_amg) { | |
1832 | GV * const gv = gv_fetchmethod(stash, "DESTROY"); | |
1833 | if (gv) | |
1834 | return GvCV(gv); | |
1835 | } | |
1836 | return NULL; | |
1837 | } | |
ad64d0ec | 1838 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 | 1839 | } |
a9fd4e40 | 1840 | assert(mg); |
32251b26 IZ |
1841 | amtp = (AMT*)mg->mg_ptr; |
1842 | if ( amtp->was_ok_am != PL_amagic_generation | |
e1a479c5 | 1843 | || amtp->was_ok_sub != newgen ) |
32251b26 | 1844 | goto do_update; |
3ad83ce7 | 1845 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 1846 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
1847 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1848 | /* Passing it through may have resulted in a warning | |
1849 | "Inherited AUTOLOAD for a non-method deprecated", since | |
1850 | our caller is going through a function call, not a method call. | |
1851 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 1852 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
1853 | |
1854 | if (gv && GvCV(gv)) | |
1855 | return GvCV(gv); | |
1856 | } | |
1857 | return ret; | |
1858 | } | |
a0288114 | 1859 | |
601f1833 | 1860 | return NULL; |
32251b26 IZ |
1861 | } |
1862 | ||
1863 | ||
6f1401dc DM |
1864 | /* Implement tryAMAGICun_MG macro. |
1865 | Do get magic, then see if the stack arg is overloaded and if so call it. | |
1866 | Flags: | |
1867 | AMGf_set return the arg using SETs rather than assigning to | |
1868 | the targ | |
1869 | AMGf_numeric apply sv_2num to the stack arg. | |
1870 | */ | |
1871 | ||
1872 | bool | |
1873 | Perl_try_amagic_un(pTHX_ int method, int flags) { | |
1874 | dVAR; | |
1875 | dSP; | |
1876 | SV* tmpsv; | |
1877 | SV* const arg = TOPs; | |
1878 | ||
1879 | SvGETMAGIC(arg); | |
1880 | ||
1881 | if (SvAMAGIC(arg) && (tmpsv = AMG_CALLun_var(arg,method))) { | |
1882 | if (flags & AMGf_set) { | |
1883 | SETs(tmpsv); | |
1884 | } | |
1885 | else { | |
1886 | dTARGET; | |
1887 | if (SvPADMY(TARG)) { | |
1888 | sv_setsv(TARG, tmpsv); | |
1889 | SETTARG; | |
1890 | } | |
1891 | else | |
1892 | SETs(tmpsv); | |
1893 | } | |
1894 | PUTBACK; | |
1895 | return TRUE; | |
1896 | } | |
1897 | ||
1898 | if ((flags & AMGf_numeric) && SvROK(arg)) | |
1899 | *sp = sv_2num(arg); | |
1900 | return FALSE; | |
1901 | } | |
1902 | ||
1903 | ||
1904 | /* Implement tryAMAGICbin_MG macro. | |
1905 | Do get magic, then see if the two stack args are overloaded and if so | |
1906 | call it. | |
1907 | Flags: | |
1908 | AMGf_set return the arg using SETs rather than assigning to | |
1909 | the targ | |
1910 | AMGf_assign op may be called as mutator (eg +=) | |
1911 | AMGf_numeric apply sv_2num to the stack arg. | |
1912 | */ | |
1913 | ||
1914 | bool | |
1915 | Perl_try_amagic_bin(pTHX_ int method, int flags) { | |
1916 | dVAR; | |
1917 | dSP; | |
1918 | SV* const left = TOPm1s; | |
1919 | SV* const right = TOPs; | |
1920 | ||
1921 | SvGETMAGIC(left); | |
1922 | if (left != right) | |
1923 | SvGETMAGIC(right); | |
1924 | ||
1925 | if (SvAMAGIC(left) || SvAMAGIC(right)) { | |
1926 | SV * const tmpsv = amagic_call(left, right, method, | |
1927 | ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0)); | |
1928 | if (tmpsv) { | |
1929 | if (flags & AMGf_set) { | |
1930 | (void)POPs; | |
1931 | SETs(tmpsv); | |
1932 | } | |
1933 | else { | |
1934 | dATARGET; | |
1935 | (void)POPs; | |
1936 | if (opASSIGN || SvPADMY(TARG)) { | |
1937 | sv_setsv(TARG, tmpsv); | |
1938 | SETTARG; | |
1939 | } | |
1940 | else | |
1941 | SETs(tmpsv); | |
1942 | } | |
1943 | PUTBACK; | |
1944 | return TRUE; | |
1945 | } | |
1946 | } | |
1947 | if (flags & AMGf_numeric) { | |
1948 | if (SvROK(left)) | |
1949 | *(sp-1) = sv_2num(left); | |
1950 | if (SvROK(right)) | |
1951 | *sp = sv_2num(right); | |
1952 | } | |
1953 | return FALSE; | |
1954 | } | |
1955 | ||
1956 | ||
a0d0e21e | 1957 | SV* |
864dbfa3 | 1958 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 1959 | { |
27da23d5 | 1960 | dVAR; |
b267980d | 1961 | MAGIC *mg; |
9c5ffd7c | 1962 | CV *cv=NULL; |
a0d0e21e | 1963 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 1964 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
1965 | int off = 0, off1, lr = 0, notfound = 0; |
1966 | int postpr = 0, force_cpy = 0; | |
1967 | int assign = AMGf_assign & flags; | |
1968 | const int assignshift = assign ? 1 : 0; | |
497b47a8 JH |
1969 | #ifdef DEBUGGING |
1970 | int fl=0; | |
497b47a8 | 1971 | #endif |
25716404 | 1972 | HV* stash=NULL; |
7918f24d NC |
1973 | |
1974 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
1975 | ||
e46c382e YK |
1976 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
1977 | SV *lex_mask = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, | |
1978 | 0, "overloading", 11, 0, 0); | |
1979 | ||
1980 | if ( !lex_mask || !SvOK(lex_mask) ) | |
1981 | /* overloading lexically disabled */ | |
1982 | return NULL; | |
1983 | else if ( lex_mask && SvPOK(lex_mask) ) { | |
1984 | /* we have an entry in the hints hash, check if method has been | |
1985 | * masked by overloading.pm */ | |
d15cd831 | 1986 | STRLEN len; |
e46c382e | 1987 | const int offset = method / 8; |
d87d3eed | 1988 | const int bit = method % 8; |
e46c382e YK |
1989 | char *pv = SvPV(lex_mask, len); |
1990 | ||
d15cd831 | 1991 | /* Bit set, so this overloading operator is disabled */ |
ed15e576 | 1992 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) |
e46c382e YK |
1993 | return NULL; |
1994 | } | |
1995 | } | |
1996 | ||
a0d0e21e | 1997 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 | 1998 | && (stash = SvSTASH(SvRV(left))) |
ad64d0ec | 1999 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 2000 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 2001 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 2002 | : NULL)) |
b267980d | 2003 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
2004 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
2005 | * usual method */ | |
497b47a8 JH |
2006 | ( |
2007 | #ifdef DEBUGGING | |
2008 | fl = 1, | |
a0288114 | 2009 | #endif |
497b47a8 | 2010 | cv = cvp[off=method])))) { |
a0d0e21e LW |
2011 | lr = -1; /* Call method for left argument */ |
2012 | } else { | |
2013 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
2014 | int logic; | |
2015 | ||
2016 | /* look for substituted methods */ | |
ee239bfe | 2017 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
2018 | switch (method) { |
2019 | case inc_amg: | |
ee239bfe IZ |
2020 | force_cpy = 1; |
2021 | if ((cv = cvp[off=add_ass_amg]) | |
2022 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 2023 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
2024 | } |
2025 | break; | |
2026 | case dec_amg: | |
ee239bfe IZ |
2027 | force_cpy = 1; |
2028 | if ((cv = cvp[off = subtr_ass_amg]) | |
2029 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 2030 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
2031 | } |
2032 | break; | |
2033 | case bool__amg: | |
2034 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
2035 | break; | |
2036 | case numer_amg: | |
2037 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
2038 | break; | |
2039 | case string_amg: | |
2040 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
2041 | break; | |
b7787f18 AL |
2042 | case not_amg: |
2043 | (void)((cv = cvp[off=bool__amg]) | |
2044 | || (cv = cvp[off=numer_amg]) | |
2045 | || (cv = cvp[off=string_amg])); | |
2ab54efd MB |
2046 | if (cv) |
2047 | postpr = 1; | |
b7787f18 | 2048 | break; |
748a9306 LW |
2049 | case copy_amg: |
2050 | { | |
76e3520e GS |
2051 | /* |
2052 | * SV* ref causes confusion with the interpreter variable of | |
2053 | * the same name | |
2054 | */ | |
890ce7af | 2055 | SV* const tmpRef=SvRV(left); |
76e3520e | 2056 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 2057 | /* |
2058 | * Just to be extra cautious. Maybe in some | |
2059 | * additional cases sv_setsv is safe, too. | |
2060 | */ | |
890ce7af | 2061 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 2062 | SvOBJECT_on(newref); |
96d4b0ee NC |
2063 | /* As a bit of a source compatibility hack, SvAMAGIC() and |
2064 | friends dereference an RV, to behave the same was as when | |
2065 | overloading was stored on the reference, not the referant. | |
2066 | Hence we can't use SvAMAGIC_on() | |
2067 | */ | |
2068 | SvFLAGS(newref) |= SVf_AMAGIC; | |
85fbaab2 | 2069 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); |
748a9306 LW |
2070 | return newref; |
2071 | } | |
2072 | } | |
2073 | break; | |
a0d0e21e | 2074 | case abs_amg: |
b267980d | 2075 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 2076 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 2077 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 2078 | if (off1==lt_amg) { |
890ce7af | 2079 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
2080 | lt_amg,AMGf_noright); |
2081 | logic = SvTRUE(lessp); | |
2082 | } else { | |
890ce7af | 2083 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
2084 | ncmp_amg,AMGf_noright); |
2085 | logic = (SvNV(lessp) < 0); | |
2086 | } | |
2087 | if (logic) { | |
2088 | if (off==subtr_amg) { | |
2089 | right = left; | |
748a9306 | 2090 | left = nullsv; |
a0d0e21e LW |
2091 | lr = 1; |
2092 | } | |
2093 | } else { | |
2094 | return left; | |
2095 | } | |
2096 | } | |
2097 | break; | |
2098 | case neg_amg: | |
155aba94 | 2099 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
2100 | right = left; |
2101 | left = sv_2mortal(newSViv(0)); | |
2102 | lr = 1; | |
2103 | } | |
2104 | break; | |
f216259d | 2105 | case int_amg: |
f5284f61 | 2106 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
c4c7412c | 2107 | case ftest_amg: /* XXXX Eventually should do to_gv. */ |
d4b87e75 | 2108 | case regexp_amg: |
b267980d NIS |
2109 | /* FAIL safe */ |
2110 | return NULL; /* Delegate operation to standard mechanisms. */ | |
2111 | break; | |
f5284f61 IZ |
2112 | case to_sv_amg: |
2113 | case to_av_amg: | |
2114 | case to_hv_amg: | |
2115 | case to_gv_amg: | |
2116 | case to_cv_amg: | |
2117 | /* FAIL safe */ | |
b267980d | 2118 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 | 2119 | break; |
a0d0e21e LW |
2120 | default: |
2121 | goto not_found; | |
2122 | } | |
2123 | if (!cv) goto not_found; | |
2124 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
25716404 | 2125 | && (stash = SvSTASH(SvRV(right))) |
ad64d0ec | 2126 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 2127 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 2128 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 2129 | : NULL)) |
a0d0e21e LW |
2130 | && (cv = cvp[off=method])) { /* Method for right |
2131 | * argument found */ | |
2132 | lr=1; | |
b267980d NIS |
2133 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
2134 | && (cvp=ocvp) && (lr = -1)) | |
a0d0e21e LW |
2135 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
2136 | && !(flags & AMGf_unary)) { | |
2137 | /* We look for substitution for | |
2138 | * comparison operations and | |
fc36a67e | 2139 | * concatenation */ |
a0d0e21e LW |
2140 | if (method==concat_amg || method==concat_ass_amg |
2141 | || method==repeat_amg || method==repeat_ass_amg) { | |
2142 | return NULL; /* Delegate operation to string conversion */ | |
2143 | } | |
2144 | off = -1; | |
2145 | switch (method) { | |
2146 | case lt_amg: | |
2147 | case le_amg: | |
2148 | case gt_amg: | |
2149 | case ge_amg: | |
2150 | case eq_amg: | |
2151 | case ne_amg: | |
2ab54efd MB |
2152 | off = ncmp_amg; |
2153 | break; | |
a0d0e21e LW |
2154 | case slt_amg: |
2155 | case sle_amg: | |
2156 | case sgt_amg: | |
2157 | case sge_amg: | |
2158 | case seq_amg: | |
2159 | case sne_amg: | |
2ab54efd MB |
2160 | off = scmp_amg; |
2161 | break; | |
a0d0e21e | 2162 | } |
2ab54efd MB |
2163 | if ((off != -1) && (cv = cvp[off])) |
2164 | postpr = 1; | |
2165 | else | |
2166 | goto not_found; | |
a0d0e21e | 2167 | } else { |
a6006777 | 2168 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
2169 | switch (method) { |
2170 | case to_sv_amg: | |
2171 | case to_av_amg: | |
2172 | case to_hv_amg: | |
2173 | case to_gv_amg: | |
2174 | case to_cv_amg: | |
2175 | /* FAIL safe */ | |
2176 | return left; /* Delegate operation to standard mechanisms. */ | |
2177 | break; | |
2178 | } | |
a0d0e21e LW |
2179 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
2180 | notfound = 1; lr = -1; | |
2181 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
2182 | notfound = 1; lr = 1; | |
4cc0ca18 NC |
2183 | } else if ((amtp && amtp->fallback >= AMGfallYES) && !DEBUG_o_TEST) { |
2184 | /* Skip generating the "no method found" message. */ | |
2185 | return NULL; | |
a0d0e21e | 2186 | } else { |
46fc3d4c | 2187 | SV *msg; |
774d564b | 2188 | if (off==-1) off=method; |
b267980d | 2189 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 | 2190 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 | 2191 | AMG_id2name(method + assignshift), |
e7ea3e70 | 2192 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d | 2193 | SvAMAGIC(left)? |
a0d0e21e LW |
2194 | "in overloaded package ": |
2195 | "has no overloaded magic", | |
b267980d | 2196 | SvAMAGIC(left)? |
bfcb3514 | 2197 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e | 2198 | "", |
b267980d | 2199 | SvAMAGIC(right)? |
e7ea3e70 | 2200 | ",\n\tright argument in overloaded package ": |
b267980d | 2201 | (flags & AMGf_unary |
e7ea3e70 IZ |
2202 | ? "" |
2203 | : ",\n\tright argument has no overloaded magic"), | |
b267980d | 2204 | SvAMAGIC(right)? |
bfcb3514 | 2205 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c | 2206 | "")); |
a0d0e21e | 2207 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 | 2208 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e | 2209 | } else { |
be2597df | 2210 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e LW |
2211 | } |
2212 | return NULL; | |
2213 | } | |
ee239bfe | 2214 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
2215 | } |
2216 | } | |
497b47a8 | 2217 | #ifdef DEBUGGING |
a0d0e21e | 2218 | if (!notfound) { |
497b47a8 | 2219 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 | 2220 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 JH |
2221 | AMG_id2name(off), |
2222 | method+assignshift==off? "" : | |
a0288114 | 2223 | " (initially \"", |
497b47a8 JH |
2224 | method+assignshift==off? "" : |
2225 | AMG_id2name(method+assignshift), | |
a0288114 | 2226 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
2227 | flags & AMGf_unary? "" : |
2228 | lr==1 ? " for right argument": " for left argument", | |
2229 | flags & AMGf_unary? " for argument" : "", | |
bfcb3514 | 2230 | stash ? HvNAME_get(stash) : "null", |
497b47a8 | 2231 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 2232 | } |
497b47a8 | 2233 | #endif |
748a9306 LW |
2234 | /* Since we use shallow copy during assignment, we need |
2235 | * to dublicate the contents, probably calling user-supplied | |
2236 | * version of copy operator | |
2237 | */ | |
ee239bfe IZ |
2238 | /* We need to copy in following cases: |
2239 | * a) Assignment form was called. | |
2240 | * assignshift==1, assign==T, method + 1 == off | |
2241 | * b) Increment or decrement, called directly. | |
2242 | * assignshift==0, assign==0, method + 0 == off | |
2243 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 2244 | * assignshift==0, assign==T, |
ee239bfe IZ |
2245 | * force_cpy == T |
2246 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 2247 | * assignshift==0, assign==0, |
ee239bfe IZ |
2248 | * force_cpy == T |
2249 | * e) Assignment form translated to nomethod. | |
2250 | * assignshift==1, assign==T, method + 1 != off | |
2251 | * force_cpy == T | |
2252 | */ | |
2253 | /* off is method, method+assignshift, or a result of opcode substitution. | |
2254 | * In the latter case assignshift==0, so only notfound case is important. | |
2255 | */ | |
2256 | if (( (method + assignshift == off) | |
2257 | && (assign || (method == inc_amg) || (method == dec_amg))) | |
2258 | || force_cpy) | |
6f1401dc | 2259 | { |
ee239bfe | 2260 | RvDEEPCP(left); |
6f1401dc DM |
2261 | } |
2262 | ||
a0d0e21e LW |
2263 | { |
2264 | dSP; | |
2265 | BINOP myop; | |
2266 | SV* res; | |
b7787f18 | 2267 | const bool oldcatch = CATCH_GET; |
a0d0e21e | 2268 | |
54310121 | 2269 | CATCH_SET(TRUE); |
a0d0e21e LW |
2270 | Zero(&myop, 1, BINOP); |
2271 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 2272 | myop.op_next = NULL; |
54310121 | 2273 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e | 2274 | |
e788e7d3 | 2275 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 2276 | ENTER; |
462e5cf6 | 2277 | SAVEOP(); |
533c011a | 2278 | PL_op = (OP *) &myop; |
3280af22 | 2279 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 2280 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 2281 | PUTBACK; |
cea2e8a9 | 2282 | pp_pushmark(); |
a0d0e21e | 2283 | |
924508f0 | 2284 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
2285 | PUSHs(lr>0? right: left); |
2286 | PUSHs(lr>0? left: right); | |
3280af22 | 2287 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 2288 | if (notfound) { |
59cd0e26 NC |
2289 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
2290 | AMG_id2namelen(method + assignshift), SVs_TEMP)); | |
a0d0e21e | 2291 | } |
ad64d0ec | 2292 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e LW |
2293 | PUTBACK; |
2294 | ||
139d0ce6 | 2295 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 | 2296 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
2297 | LEAVE; |
2298 | SPAGAIN; | |
2299 | ||
2300 | res=POPs; | |
ebafeae7 | 2301 | PUTBACK; |
d3acc0f7 | 2302 | POPSTACK; |
54310121 | 2303 | CATCH_SET(oldcatch); |
a0d0e21e | 2304 | |
a0d0e21e | 2305 | if (postpr) { |
b7787f18 | 2306 | int ans; |
a0d0e21e LW |
2307 | switch (method) { |
2308 | case le_amg: | |
2309 | case sle_amg: | |
2310 | ans=SvIV(res)<=0; break; | |
2311 | case lt_amg: | |
2312 | case slt_amg: | |
2313 | ans=SvIV(res)<0; break; | |
2314 | case ge_amg: | |
2315 | case sge_amg: | |
2316 | ans=SvIV(res)>=0; break; | |
2317 | case gt_amg: | |
2318 | case sgt_amg: | |
2319 | ans=SvIV(res)>0; break; | |
2320 | case eq_amg: | |
2321 | case seq_amg: | |
2322 | ans=SvIV(res)==0; break; | |
2323 | case ne_amg: | |
2324 | case sne_amg: | |
2325 | ans=SvIV(res)!=0; break; | |
2326 | case inc_amg: | |
2327 | case dec_amg: | |
bbce6d69 | 2328 | SvSetSV(left,res); return left; |
dc437b57 | 2329 | case not_amg: |
fe7ac86a | 2330 | ans=!SvTRUE(res); break; |
b7787f18 AL |
2331 | default: |
2332 | ans=0; break; | |
a0d0e21e | 2333 | } |
54310121 | 2334 | return boolSV(ans); |
748a9306 LW |
2335 | } else if (method==copy_amg) { |
2336 | if (!SvROK(res)) { | |
cea2e8a9 | 2337 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
2338 | } |
2339 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
2340 | } else { |
2341 | return res; | |
2342 | } | |
2343 | } | |
2344 | } | |
c9d5ac95 GS |
2345 | |
2346 | /* | |
7fc63493 | 2347 | =for apidoc is_gv_magical_sv |
c9d5ac95 GS |
2348 | |
2349 | Returns C<TRUE> if given the name of a magical GV. | |
2350 | ||
2351 | Currently only useful internally when determining if a GV should be | |
2352 | created even in rvalue contexts. | |
2353 | ||
2354 | C<flags> is not used at present but available for future extension to | |
2355 | allow selecting particular classes of magical variable. | |
2356 | ||
b9b0e72c NC |
2357 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
2358 | This assumption is met by all callers within the perl core, which all pass | |
2359 | pointers returned by SvPV. | |
2360 | ||
c9d5ac95 GS |
2361 | =cut |
2362 | */ | |
9d8f40c4 | 2363 | |
c9d5ac95 | 2364 | bool |
9d8f40c4 | 2365 | Perl_is_gv_magical_sv(pTHX_ SV *const name_sv, U32 flags) |
c9d5ac95 | 2366 | { |
9d8f40c4 NC |
2367 | STRLEN len; |
2368 | const char *const name = SvPV_const(name_sv, len); | |
9d4ba2ae | 2369 | |
9d8f40c4 NC |
2370 | PERL_UNUSED_ARG(flags); |
2371 | PERL_ARGS_ASSERT_IS_GV_MAGICAL_SV; | |
7918f24d | 2372 | |
b9b0e72c | 2373 | if (len > 1) { |
b464bac0 | 2374 | const char * const name1 = name + 1; |
b9b0e72c NC |
2375 | switch (*name) { |
2376 | case 'I': | |
f2df7081 | 2377 | if (len == 3 && name[1] == 'S' && name[2] == 'A') |
b9b0e72c NC |
2378 | goto yes; |
2379 | break; | |
2380 | case 'O': | |
9431620d | 2381 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c NC |
2382 | goto yes; |
2383 | break; | |
2384 | case 'S': | |
9431620d | 2385 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c NC |
2386 | goto yes; |
2387 | break; | |
2388 | /* Using ${^...} variables is likely to be sufficiently rare that | |
2389 | it seems sensible to avoid the space hit of also checking the | |
2390 | length. */ | |
2391 | case '\017': /* ${^OPEN} */ | |
9431620d | 2392 | if (strEQ(name1, "PEN")) |
b9b0e72c NC |
2393 | goto yes; |
2394 | break; | |
2395 | case '\024': /* ${^TAINT} */ | |
9431620d | 2396 | if (strEQ(name1, "AINT")) |
b9b0e72c NC |
2397 | goto yes; |
2398 | break; | |
2399 | case '\025': /* ${^UNICODE} */ | |
9431620d | 2400 | if (strEQ(name1, "NICODE")) |
b9b0e72c | 2401 | goto yes; |
a0288114 | 2402 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 | 2403 | goto yes; |
b9b0e72c NC |
2404 | break; |
2405 | case '\027': /* ${^WARNING_BITS} */ | |
9431620d | 2406 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c NC |
2407 | goto yes; |
2408 | break; | |
2409 | case '1': | |
2410 | case '2': | |
2411 | case '3': | |
2412 | case '4': | |
2413 | case '5': | |
2414 | case '6': | |
2415 | case '7': | |
2416 | case '8': | |
2417 | case '9': | |
c9d5ac95 | 2418 | { |
7fc63493 | 2419 | const char *end = name + len; |
c9d5ac95 GS |
2420 | while (--end > name) { |
2421 | if (!isDIGIT(*end)) | |
2422 | return FALSE; | |
2423 | } | |
b9b0e72c NC |
2424 | goto yes; |
2425 | } | |
2426 | } | |
2427 | } else { | |
2428 | /* Because we're already assuming that name is NUL terminated | |
2429 | below, we can treat an empty name as "\0" */ | |
2430 | switch (*name) { | |
2431 | case '&': | |
2432 | case '`': | |
2433 | case '\'': | |
2434 | case ':': | |
2435 | case '?': | |
2436 | case '!': | |
2437 | case '-': | |
2438 | case '#': | |
2439 | case '[': | |
2440 | case '^': | |
2441 | case '~': | |
2442 | case '=': | |
2443 | case '%': | |
2444 | case '.': | |
2445 | case '(': | |
2446 | case ')': | |
2447 | case '<': | |
2448 | case '>': | |
b9b0e72c NC |
2449 | case '\\': |
2450 | case '/': | |
2451 | case '|': | |
2452 | case '+': | |
2453 | case ';': | |
2454 | case ']': | |
2455 | case '\001': /* $^A */ | |
2456 | case '\003': /* $^C */ | |
2457 | case '\004': /* $^D */ | |
2458 | case '\005': /* $^E */ | |
2459 | case '\006': /* $^F */ | |
2460 | case '\010': /* $^H */ | |
2461 | case '\011': /* $^I, NOT \t in EBCDIC */ | |
2462 | case '\014': /* $^L */ | |
2463 | case '\016': /* $^N */ | |
2464 | case '\017': /* $^O */ | |
2465 | case '\020': /* $^P */ | |
2466 | case '\023': /* $^S */ | |
2467 | case '\024': /* $^T */ | |
2468 | case '\026': /* $^V */ | |
2469 | case '\027': /* $^W */ | |
2470 | case '1': | |
2471 | case '2': | |
2472 | case '3': | |
2473 | case '4': | |
2474 | case '5': | |
2475 | case '6': | |
2476 | case '7': | |
2477 | case '8': | |
2478 | case '9': | |
2479 | yes: | |
2480 | return TRUE; | |
2481 | default: | |
2482 | break; | |
c9d5ac95 | 2483 | } |
c9d5ac95 GS |
2484 | } |
2485 | return FALSE; | |
2486 | } | |
66610fdd | 2487 | |
f5c1e807 NC |
2488 | void |
2489 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
2490 | { | |
2491 | dVAR; | |
acda4c6a | 2492 | U32 hash; |
f5c1e807 | 2493 | |
7918f24d | 2494 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 NC |
2495 | PERL_UNUSED_ARG(flags); |
2496 | ||
acda4c6a NC |
2497 | if (len > I32_MAX) |
2498 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); | |
2499 | ||
ae8cc45f NC |
2500 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2501 | unshare_hek(GvNAME_HEK(gv)); | |
2502 | } | |
2503 | ||
acda4c6a | 2504 | PERL_HASH(hash, name, len); |
9f616d01 | 2505 | GvNAME_HEK(gv) = share_hek(name, len, hash); |
f5c1e807 NC |
2506 | } |
2507 | ||
66610fdd | 2508 | /* |
f7461760 Z |
2509 | =for apidoc gv_try_downgrade |
2510 | ||
2867cdbc Z |
2511 | If the typeglob C<gv> can be expressed more succinctly, by having |
2512 | something other than a real GV in its place in the stash, replace it | |
2513 | with the optimised form. Basic requirements for this are that C<gv> | |
2514 | is a real typeglob, is sufficiently ordinary, and is only referenced | |
2515 | from its package. This function is meant to be used when a GV has been | |
2516 | looked up in part to see what was there, causing upgrading, but based | |
2517 | on what was found it turns out that the real GV isn't required after all. | |
2518 | ||
2519 | If C<gv> is a completely empty typeglob, it is deleted from the stash. | |
2520 | ||
2521 | If C<gv> is a typeglob containing only a sufficiently-ordinary constant | |
2522 | sub, the typeglob is replaced with a scalar-reference placeholder that | |
2523 | more compactly represents the same thing. | |
f7461760 Z |
2524 | |
2525 | =cut | |
2526 | */ | |
2527 | ||
2528 | void | |
2529 | Perl_gv_try_downgrade(pTHX_ GV *gv) | |
2530 | { | |
2531 | HV *stash; | |
2532 | CV *cv; | |
2533 | HEK *namehek; | |
2534 | SV **gvp; | |
2535 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; | |
2867cdbc | 2536 | if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
803f2748 | 2537 | !SvOBJECT(gv) && !SvREADONLY(gv) && |
f7461760 | 2538 | isGV_with_GP(gv) && GvGP(gv) && |
2867cdbc | 2539 | !GvINTRO(gv) && GvREFCNT(gv) == 1 && |
f7461760 | 2540 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && |
099be4f1 | 2541 | GvEGVx(gv) == gv && (stash = GvSTASH(gv)))) |
2867cdbc | 2542 | return; |
803f2748 DM |
2543 | if (SvMAGICAL(gv)) { |
2544 | MAGIC *mg; | |
2545 | /* only backref magic is allowed */ | |
2546 | if (SvGMAGICAL(gv) || SvSMAGICAL(gv)) | |
2547 | return; | |
2548 | for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) { | |
2549 | if (mg->mg_type != PERL_MAGIC_backref) | |
2550 | return; | |
2551 | } | |
2552 | } | |
2867cdbc Z |
2553 | cv = GvCV(gv); |
2554 | if (!cv) { | |
2555 | HEK *gvnhek = GvNAME_HEK(gv); | |
2556 | (void)hv_delete(stash, HEK_KEY(gvnhek), | |
2557 | HEK_UTF8(gvnhek) ? -HEK_LEN(gvnhek) : HEK_LEN(gvnhek), G_DISCARD); | |
2558 | } else if (GvMULTI(gv) && cv && | |
f7461760 Z |
2559 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
2560 | CvSTASH(cv) == stash && CvGV(cv) == gv && | |
2561 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && | |
2562 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && | |
2563 | (namehek = GvNAME_HEK(gv)) && | |
2564 | (gvp = hv_fetch(stash, HEK_KEY(namehek), | |
2565 | HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) && | |
2566 | *gvp == (SV*)gv) { | |
2567 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); | |
2568 | SvREFCNT(gv) = 0; | |
2569 | sv_clear((SV*)gv); | |
2570 | SvREFCNT(gv) = 1; | |
2571 | SvFLAGS(gv) = SVt_IV|SVf_ROK; | |
2572 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - | |
2573 | STRUCT_OFFSET(XPVIV, xiv_iv)); | |
2574 | SvRV_set(gv, value); | |
2575 | } | |
2576 | } | |
2577 | ||
2578 | /* | |
66610fdd RGS |
2579 | * Local variables: |
2580 | * c-indentation-style: bsd | |
2581 | * c-basic-offset: 4 | |
2582 | * indent-tabs-mode: t | |
2583 | * End: | |
2584 | * | |
37442d52 RGS |
2585 | * ex: set ts=8 sts=4 sw=4 noet: |
2586 | */ |