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 | 18 | * |
cdad3b53 | 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" |
4aaa4757 | 39 | #include "keywords.h" |
79072805 | 40 | |
f54cb97a AL |
41 | static const char S_autoload[] = "AUTOLOAD"; |
42 | static const STRLEN S_autolen = sizeof(S_autoload)-1; | |
5c7983e5 | 43 | |
c69033f2 | 44 | GV * |
d5713896 | 45 | Perl_gv_add_by_type(pTHX_ GV *gv, svtype type) |
c69033f2 | 46 | { |
d5713896 | 47 | SV **where; |
7918f24d | 48 | |
13be902c FC |
49 | if ( |
50 | !gv | |
51 | || ( | |
52 | SvTYPE((const SV *)gv) != SVt_PVGV | |
53 | && SvTYPE((const SV *)gv) != SVt_PVLV | |
54 | ) | |
55 | ) { | |
bb85b28a NC |
56 | const char *what; |
57 | if (type == SVt_PVIO) { | |
58 | /* | |
59 | * if it walks like a dirhandle, then let's assume that | |
60 | * this is a dirhandle. | |
61 | */ | |
62 | what = PL_op->op_type == OP_READDIR || | |
63 | PL_op->op_type == OP_TELLDIR || | |
64 | PL_op->op_type == OP_SEEKDIR || | |
65 | PL_op->op_type == OP_REWINDDIR || | |
66 | PL_op->op_type == OP_CLOSEDIR ? | |
67 | "dirhandle" : "filehandle"; | |
68 | /* diag_listed_as: Bad symbol for filehandle */ | |
69 | } else if (type == SVt_PVHV) { | |
70 | what = "hash"; | |
71 | } else { | |
72 | what = type == SVt_PVAV ? "array" : "scalar"; | |
73 | } | |
74 | Perl_croak(aTHX_ "Bad symbol for %s", what); | |
75 | } | |
d5713896 NC |
76 | |
77 | if (type == SVt_PVHV) { | |
78 | where = (SV **)&GvHV(gv); | |
79 | } else if (type == SVt_PVAV) { | |
80 | where = (SV **)&GvAV(gv); | |
bb85b28a NC |
81 | } else if (type == SVt_PVIO) { |
82 | where = (SV **)&GvIOp(gv); | |
d5713896 NC |
83 | } else { |
84 | where = &GvSV(gv); | |
85 | } | |
7918f24d | 86 | |
d5713896 NC |
87 | if (!*where) |
88 | *where = newSV_type(type); | |
79072805 LW |
89 | return gv; |
90 | } | |
91 | ||
92 | GV * | |
864dbfa3 | 93 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 94 | { |
7918f24d | 95 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec NC |
96 | return gv_fetchfile_flags(name, strlen(name), 0); |
97 | } | |
98 | ||
99 | GV * | |
100 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
101 | const U32 flags) | |
102 | { | |
97aff369 | 103 | dVAR; |
4116122e | 104 | char smallbuf[128]; |
53d95988 | 105 | char *tmpbuf; |
d9095cec | 106 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
107 | GV *gv; |
108 | ||
7918f24d | 109 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec NC |
110 | PERL_UNUSED_ARG(flags); |
111 | ||
1d7c1841 | 112 | if (!PL_defstash) |
a0714e2c | 113 | return NULL; |
1d7c1841 | 114 | |
d9095cec | 115 | if (tmplen <= sizeof smallbuf) |
53d95988 CS |
116 | tmpbuf = smallbuf; |
117 | else | |
798b63bc | 118 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 119 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
120 | tmpbuf[0] = '_'; |
121 | tmpbuf[1] = '<'; | |
d9095cec NC |
122 | memcpy(tmpbuf + 2, name, namelen); |
123 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); | |
1d7c1841 | 124 | if (!isGV(gv)) { |
d9095cec | 125 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 | 126 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec | 127 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 128 | #else |
d9095cec | 129 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 130 | #endif |
1d7c1841 | 131 | } |
5a9a79a4 FC |
132 | if ((PERLDB_LINE || PERLDB_SAVESRC) && !GvAV(gv)) |
133 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); | |
53d95988 CS |
134 | if (tmpbuf != smallbuf) |
135 | Safefree(tmpbuf); | |
79072805 LW |
136 | return gv; |
137 | } | |
138 | ||
62d55b22 NC |
139 | /* |
140 | =for apidoc gv_const_sv | |
141 | ||
142 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
143 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
144 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
145 | NULL. | |
146 | ||
147 | =cut | |
148 | */ | |
149 | ||
150 | SV * | |
151 | Perl_gv_const_sv(pTHX_ GV *gv) | |
152 | { | |
7918f24d NC |
153 | PERL_ARGS_ASSERT_GV_CONST_SV; |
154 | ||
62d55b22 NC |
155 | if (SvTYPE(gv) == SVt_PVGV) |
156 | return cv_const_sv(GvCVu(gv)); | |
157 | return SvROK(gv) ? SvRV(gv) : NULL; | |
158 | } | |
159 | ||
12816592 NC |
160 | GP * |
161 | Perl_newGP(pTHX_ GV *const gv) | |
162 | { | |
163 | GP *gp; | |
19bad673 NC |
164 | U32 hash; |
165 | #ifdef USE_ITHREADS | |
1df5f7c1 NC |
166 | const char *const file |
167 | = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : ""; | |
19bad673 NC |
168 | const STRLEN len = strlen(file); |
169 | #else | |
170 | SV *const temp_sv = CopFILESV(PL_curcop); | |
171 | const char *file; | |
172 | STRLEN len; | |
173 | ||
7918f24d NC |
174 | PERL_ARGS_ASSERT_NEWGP; |
175 | ||
19bad673 NC |
176 | if (temp_sv) { |
177 | file = SvPVX(temp_sv); | |
178 | len = SvCUR(temp_sv); | |
179 | } else { | |
180 | file = ""; | |
181 | len = 0; | |
182 | } | |
183 | #endif | |
f4890806 NC |
184 | |
185 | PERL_HASH(hash, file, len); | |
186 | ||
12816592 NC |
187 | Newxz(gp, 1, GP); |
188 | ||
189 | #ifndef PERL_DONT_CREATE_GVSV | |
b5c2dcb8 | 190 | gp->gp_sv = newSV(0); |
12816592 NC |
191 | #endif |
192 | ||
1df5f7c1 | 193 | gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0; |
12816592 NC |
194 | /* XXX Ideally this cast would be replaced with a change to const char* |
195 | in the struct. */ | |
f4890806 | 196 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
197 | gp->gp_egv = gv; |
198 | gp->gp_refcnt = 1; | |
199 | ||
200 | return gp; | |
201 | } | |
202 | ||
803f2748 DM |
203 | /* Assign CvGV(cv) = gv, handling weak references. |
204 | * See also S_anonymise_cv_maybe */ | |
205 | ||
206 | void | |
207 | Perl_cvgv_set(pTHX_ CV* cv, GV* gv) | |
208 | { | |
209 | GV * const oldgv = CvGV(cv); | |
210 | PERL_ARGS_ASSERT_CVGV_SET; | |
211 | ||
212 | if (oldgv == gv) | |
213 | return; | |
214 | ||
215 | if (oldgv) { | |
cfc1e951 | 216 | if (CvCVGV_RC(cv)) { |
803f2748 | 217 | SvREFCNT_dec(oldgv); |
cfc1e951 DM |
218 | CvCVGV_RC_off(cv); |
219 | } | |
803f2748 | 220 | else { |
803f2748 DM |
221 | sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv)); |
222 | } | |
223 | } | |
224 | ||
b3f91e91 | 225 | SvANY(cv)->xcv_gv = gv; |
c794ca97 | 226 | assert(!CvCVGV_RC(cv)); |
803f2748 DM |
227 | |
228 | if (!gv) | |
229 | return; | |
230 | ||
c794ca97 DM |
231 | if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv)) |
232 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv)); | |
233 | else { | |
cfc1e951 | 234 | CvCVGV_RC_on(cv); |
803f2748 DM |
235 | SvREFCNT_inc_simple_void_NN(gv); |
236 | } | |
803f2748 DM |
237 | } |
238 | ||
c68d9564 Z |
239 | /* Assign CvSTASH(cv) = st, handling weak references. */ |
240 | ||
241 | void | |
242 | Perl_cvstash_set(pTHX_ CV *cv, HV *st) | |
243 | { | |
244 | HV *oldst = CvSTASH(cv); | |
245 | PERL_ARGS_ASSERT_CVSTASH_SET; | |
246 | if (oldst == st) | |
247 | return; | |
248 | if (oldst) | |
249 | sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv)); | |
250 | SvANY(cv)->xcv_stash = st; | |
251 | if (st) | |
252 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv)); | |
253 | } | |
803f2748 | 254 | |
463ee0b2 | 255 | void |
864dbfa3 | 256 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 | 257 | { |
27da23d5 | 258 | dVAR; |
3b6733bf NC |
259 | const U32 old_type = SvTYPE(gv); |
260 | const bool doproto = old_type > SVt_NULL; | |
024963f8 | 261 | char * const proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
49a54bbe | 262 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
756cb477 | 263 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 264 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 | 265 | |
7918f24d | 266 | PERL_ARGS_ASSERT_GV_INIT; |
756cb477 NC |
267 | assert (!(proto && has_constant)); |
268 | ||
269 | if (has_constant) { | |
5c1f4d79 NC |
270 | /* The constant has to be a simple scalar type. */ |
271 | switch (SvTYPE(has_constant)) { | |
272 | case SVt_PVAV: | |
273 | case SVt_PVHV: | |
274 | case SVt_PVCV: | |
275 | case SVt_PVFM: | |
276 | case SVt_PVIO: | |
277 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
278 | sv_reftype(has_constant, 0)); | |
42d0e0b7 | 279 | default: NOOP; |
5c1f4d79 | 280 | } |
756cb477 NC |
281 | SvRV_set(gv, NULL); |
282 | SvROK_off(gv); | |
283 | } | |
463ee0b2 | 284 | |
3b6733bf NC |
285 | |
286 | if (old_type < SVt_PVGV) { | |
287 | if (old_type >= SVt_PV) | |
288 | SvCUR_set(gv, 0); | |
ad64d0ec | 289 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); |
3b6733bf | 290 | } |
55d729e4 GS |
291 | if (SvLEN(gv)) { |
292 | if (proto) { | |
f880fe2f | 293 | SvPV_set(gv, NULL); |
b162af07 | 294 | SvLEN_set(gv, 0); |
55d729e4 GS |
295 | SvPOK_off(gv); |
296 | } else | |
94010e71 | 297 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 298 | } |
2e5b91de NC |
299 | SvIOK_off(gv); |
300 | isGV_with_GP_on(gv); | |
12816592 | 301 | |
c43ae56f | 302 | GvGP_set(gv, Perl_newGP(aTHX_ gv)); |
e15faf7d NC |
303 | GvSTASH(gv) = stash; |
304 | if (stash) | |
ad64d0ec | 305 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
ae8cc45f | 306 | gv_name_set(gv, name, len, GV_ADD); |
23ad5bf5 | 307 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 | 308 | GvMULTI_on(gv); |
55d729e4 | 309 | if (doproto) { /* Replicate part of newSUB here. */ |
e3d2b9e7 | 310 | CV *cv; |
55d729e4 | 311 | ENTER; |
756cb477 | 312 | if (has_constant) { |
e5c69c9b DM |
313 | char *name0 = NULL; |
314 | if (name[len]) | |
315 | /* newCONSTSUB doesn't take a len arg, so make sure we | |
316 | * give it a \0-terminated string */ | |
317 | name0 = savepvn(name,len); | |
318 | ||
756cb477 | 319 | /* newCONSTSUB takes ownership of the reference from us. */ |
e5c69c9b | 320 | cv = newCONSTSUB(stash, (name0 ? name0 : name), has_constant); |
75bd28cf FC |
321 | /* In case op.c:S_process_special_blocks stole it: */ |
322 | if (!GvCV(gv)) | |
c43ae56f | 323 | GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv)); |
439cdf38 | 324 | assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */ |
e5c69c9b DM |
325 | if (name0) |
326 | Safefree(name0); | |
1ccdb730 NC |
327 | /* If this reference was a copy of another, then the subroutine |
328 | must have been "imported", by a Perl space assignment to a GV | |
329 | from a reference to CV. */ | |
330 | if (exported_constant) | |
331 | GvIMPORTED_CV_on(gv); | |
756cb477 | 332 | } else { |
756cb477 | 333 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
e3d2b9e7 | 334 | cv = PL_compcv; |
c43ae56f | 335 | GvCV_set(gv,cv); |
756cb477 | 336 | } |
55d729e4 GS |
337 | LEAVE; |
338 | ||
e1a479c5 | 339 | mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */ |
b3f91e91 | 340 | CvGV_set(cv, gv); |
e3d2b9e7 | 341 | CvFILE_set_from_cop(cv, PL_curcop); |
c68d9564 | 342 | CvSTASH_set(cv, PL_curstash); |
55d729e4 | 343 | if (proto) { |
e3d2b9e7 | 344 | sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen, |
49a54bbe | 345 | SV_HAS_TRAILING_NUL); |
55d729e4 GS |
346 | } |
347 | } | |
463ee0b2 LW |
348 | } |
349 | ||
76e3520e | 350 | STATIC void |
fe9845cc | 351 | S_gv_init_sv(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 352 | { |
7918f24d NC |
353 | PERL_ARGS_ASSERT_GV_INIT_SV; |
354 | ||
a0d0e21e LW |
355 | switch (sv_type) { |
356 | case SVt_PVIO: | |
357 | (void)GvIOn(gv); | |
358 | break; | |
359 | case SVt_PVAV: | |
360 | (void)GvAVn(gv); | |
361 | break; | |
362 | case SVt_PVHV: | |
363 | (void)GvHVn(gv); | |
364 | break; | |
c69033f2 NC |
365 | #ifdef PERL_DONT_CREATE_GVSV |
366 | case SVt_NULL: | |
367 | case SVt_PVCV: | |
368 | case SVt_PVFM: | |
e654831b | 369 | case SVt_PVGV: |
c69033f2 NC |
370 | break; |
371 | default: | |
dbdce04c NC |
372 | if(GvSVn(gv)) { |
373 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
374 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
375 | its side effect */ | |
376 | } | |
c69033f2 | 377 | #endif |
a0d0e21e LW |
378 | } |
379 | } | |
380 | ||
954c1994 GS |
381 | /* |
382 | =for apidoc gv_fetchmeth | |
383 | ||
384 | Returns the glob with the given C<name> and a defined subroutine or | |
385 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
07766739 | 386 | accessible via @ISA and UNIVERSAL::. |
954c1994 GS |
387 | |
388 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
389 | side-effect creates a glob with the given C<name> in the given C<stash> | |
390 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 391 | up caching info for this glob. |
954c1994 GS |
392 | |
393 | This function grants C<"SUPER"> token as a postfix of the stash name. The | |
394 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not | |
4929bf7b | 395 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 396 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 397 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
398 | |
399 | =cut | |
400 | */ | |
401 | ||
e1a479c5 BB |
402 | /* NOTE: No support for tied ISA */ |
403 | ||
79072805 | 404 | GV * |
864dbfa3 | 405 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 | 406 | { |
97aff369 | 407 | dVAR; |
463ee0b2 | 408 | GV** gvp; |
e1a479c5 BB |
409 | AV* linear_av; |
410 | SV** linear_svp; | |
411 | SV* linear_sv; | |
412 | HV* cstash; | |
413 | GV* candidate = NULL; | |
414 | CV* cand_cv = NULL; | |
e1a479c5 | 415 | GV* topgv = NULL; |
bfcb3514 | 416 | const char *hvname; |
e1a479c5 BB |
417 | I32 create = (level >= 0) ? 1 : 0; |
418 | I32 items; | |
419 | STRLEN packlen; | |
420 | U32 topgen_cmp; | |
a0d0e21e | 421 | |
7918f24d NC |
422 | PERL_ARGS_ASSERT_GV_FETCHMETH; |
423 | ||
af09ea45 IK |
424 | /* UNIVERSAL methods should be callable without a stash */ |
425 | if (!stash) { | |
e1a479c5 | 426 | create = 0; /* probably appropriate */ |
da51bb9b | 427 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
428 | return 0; |
429 | } | |
430 | ||
e1a479c5 BB |
431 | assert(stash); |
432 | ||
bfcb3514 NC |
433 | hvname = HvNAME_get(stash); |
434 | if (!hvname) | |
e1a479c5 | 435 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 436 | |
e1a479c5 BB |
437 | assert(hvname); |
438 | assert(name); | |
463ee0b2 | 439 | |
bfcb3514 | 440 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a | 441 | |
dd69841b | 442 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 BB |
443 | |
444 | /* check locally for a real method or a cache entry */ | |
445 | gvp = (GV**)hv_fetch(stash, name, len, create); | |
446 | if(gvp) { | |
447 | topgv = *gvp; | |
448 | assert(topgv); | |
449 | if (SvTYPE(topgv) != SVt_PVGV) | |
450 | gv_init(topgv, stash, name, len, TRUE); | |
451 | if ((cand_cv = GvCV(topgv))) { | |
452 | /* If genuine method or valid cache entry, use it */ | |
453 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
454 | return topgv; | |
455 | } | |
456 | else { | |
457 | /* stale cache entry, junk it and move on */ | |
458 | SvREFCNT_dec(cand_cv); | |
c43ae56f DM |
459 | GvCV_set(topgv, NULL); |
460 | cand_cv = NULL; | |
e1a479c5 BB |
461 | GvCVGEN(topgv) = 0; |
462 | } | |
463 | } | |
464 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
465 | /* cache indicates no such method definitively */ | |
466 | return 0; | |
467 | } | |
463ee0b2 | 468 | } |
79072805 | 469 | |
e1a479c5 BB |
470 | packlen = HvNAMELEN_get(stash); |
471 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { | |
472 | HV* basestash; | |
473 | packlen -= 7; | |
474 | basestash = gv_stashpvn(hvname, packlen, GV_ADD); | |
475 | linear_av = mro_get_linear_isa(basestash); | |
9607fc9c | 476 | } |
e1a479c5 BB |
477 | else { |
478 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ | |
79072805 | 479 | } |
a0d0e21e | 480 | |
e1a479c5 BB |
481 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
482 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
483 | while (items--) { | |
484 | linear_sv = *linear_svp++; | |
485 | assert(linear_sv); | |
486 | cstash = gv_stashsv(linear_sv, 0); | |
487 | ||
dd69841b | 488 | if (!cstash) { |
a2a5de95 NC |
489 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA", |
490 | SVfARG(linear_sv), hvname); | |
e1a479c5 BB |
491 | continue; |
492 | } | |
9607fc9c | 493 | |
e1a479c5 BB |
494 | assert(cstash); |
495 | ||
496 | gvp = (GV**)hv_fetch(cstash, name, len, 0); | |
497 | if (!gvp) continue; | |
498 | candidate = *gvp; | |
499 | assert(candidate); | |
500 | if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE); | |
501 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { | |
502 | /* | |
503 | * Found real method, cache method in topgv if: | |
504 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
505 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
506 | */ | |
507 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
508 | CV *old_cv = GvCV(topgv); |
509 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 510 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 511 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
512 | GvCVGEN(topgv) = topgen_cmp; |
513 | } | |
514 | return candidate; | |
515 | } | |
516 | } | |
9607fc9c | 517 | |
e1a479c5 BB |
518 | /* Check UNIVERSAL without caching */ |
519 | if(level == 0 || level == -1) { | |
520 | candidate = gv_fetchmeth(NULL, name, len, 1); | |
521 | if(candidate) { | |
522 | cand_cv = GvCV(candidate); | |
523 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
524 | CV *old_cv = GvCV(topgv); |
525 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 526 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 527 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
528 | GvCVGEN(topgv) = topgen_cmp; |
529 | } | |
530 | return candidate; | |
531 | } | |
532 | } | |
533 | ||
534 | if (topgv && GvREFCNT(topgv) == 1) { | |
535 | /* cache the fact that the method is not defined */ | |
536 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
537 | } |
538 | ||
79072805 LW |
539 | return 0; |
540 | } | |
541 | ||
954c1994 | 542 | /* |
611c1e95 IZ |
543 | =for apidoc gv_fetchmeth_autoload |
544 | ||
545 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. | |
546 | Returns a glob for the subroutine. | |
547 | ||
548 | For an autoloaded subroutine without a GV, will create a GV even | |
549 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() | |
550 | of the result may be zero. | |
551 | ||
552 | =cut | |
553 | */ | |
554 | ||
555 | GV * | |
556 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) | |
557 | { | |
558 | GV *gv = gv_fetchmeth(stash, name, len, level); | |
559 | ||
7918f24d NC |
560 | PERL_ARGS_ASSERT_GV_FETCHMETH_AUTOLOAD; |
561 | ||
611c1e95 | 562 | if (!gv) { |
611c1e95 IZ |
563 | CV *cv; |
564 | GV **gvp; | |
565 | ||
566 | if (!stash) | |
6136c704 | 567 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b | 568 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 | 569 | return NULL; |
5c7983e5 | 570 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 | 571 | return NULL; |
611c1e95 IZ |
572 | cv = GvCV(gv); |
573 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 574 | return NULL; |
611c1e95 IZ |
575 | /* Have an autoload */ |
576 | if (level < 0) /* Cannot do without a stub */ | |
577 | gv_fetchmeth(stash, name, len, 0); | |
578 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
579 | if (!gvp) | |
6136c704 | 580 | return NULL; |
611c1e95 IZ |
581 | return *gvp; |
582 | } | |
583 | return gv; | |
584 | } | |
585 | ||
586 | /* | |
954c1994 GS |
587 | =for apidoc gv_fetchmethod_autoload |
588 | ||
589 | Returns the glob which contains the subroutine to call to invoke the method | |
590 | on the C<stash>. In fact in the presence of autoloading this may be the | |
591 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is | |
b267980d | 592 | already setup. |
954c1994 GS |
593 | |
594 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
595 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 596 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 597 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 598 | with a non-zero C<autoload> parameter. |
954c1994 GS |
599 | |
600 | These functions grant C<"SUPER"> token as a prefix of the method name. Note | |
601 | that if you want to keep the returned glob for a long time, you need to | |
602 | check for it being "AUTOLOAD", since at the later time the call may load a | |
603 | different subroutine due to $AUTOLOAD changing its value. Use the glob | |
b267980d | 604 | created via a side effect to do this. |
954c1994 GS |
605 | |
606 | These functions have the same side-effects and as C<gv_fetchmeth> with | |
607 | C<level==0>. C<name> should be writable if contains C<':'> or C<' | |
608 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to | |
b267980d | 609 | C<call_sv> apply equally to these functions. |
954c1994 GS |
610 | |
611 | =cut | |
612 | */ | |
613 | ||
7d3b1f61 BB |
614 | STATIC HV* |
615 | S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen) | |
616 | { | |
617 | AV* superisa; | |
618 | GV** gvp; | |
619 | GV* gv; | |
620 | HV* stash; | |
621 | ||
7918f24d NC |
622 | PERL_ARGS_ASSERT_GV_GET_SUPER_PKG; |
623 | ||
7d3b1f61 BB |
624 | stash = gv_stashpvn(name, namelen, 0); |
625 | if(stash) return stash; | |
626 | ||
627 | /* If we must create it, give it an @ISA array containing | |
628 | the real package this SUPER is for, so that it's tied | |
629 | into the cache invalidation code correctly */ | |
630 | stash = gv_stashpvn(name, namelen, GV_ADD); | |
631 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); | |
632 | gv = *gvp; | |
633 | gv_init(gv, stash, "ISA", 3, TRUE); | |
634 | superisa = GvAVn(gv); | |
635 | GvMULTI_on(gv); | |
ad64d0ec | 636 | sv_magic(MUTABLE_SV(superisa), MUTABLE_SV(gv), PERL_MAGIC_isa, NULL, 0); |
8e3a4a30 | 637 | #ifdef USE_ITHREADS |
7d3b1f61 | 638 | av_push(superisa, newSVpv(CopSTASHPV(PL_curcop), 0)); |
8e3a4a30 NC |
639 | #else |
640 | av_push(superisa, newSVhek(CopSTASH(PL_curcop) | |
641 | ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL)); | |
642 | #endif | |
7d3b1f61 BB |
643 | |
644 | return stash; | |
645 | } | |
646 | ||
dc848c6f | 647 | GV * |
864dbfa3 | 648 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 649 | { |
547bb267 NC |
650 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
651 | ||
256d1bb2 NC |
652 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
653 | } | |
654 | ||
655 | /* Don't merge this yet, as it's likely to get a len parameter, and possibly | |
656 | even a U32 hash */ | |
657 | GV * | |
658 | Perl_gv_fetchmethod_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
659 | { | |
97aff369 | 660 | dVAR; |
08105a92 | 661 | register const char *nend; |
c445ea15 | 662 | const char *nsplit = NULL; |
a0d0e21e | 663 | GV* gv; |
0dae17bd | 664 | HV* ostash = stash; |
c94593d0 | 665 | const char * const origname = name; |
ad64d0ec | 666 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 NC |
667 | const U32 autoload = flags & GV_AUTOLOAD; |
668 | const U32 do_croak = flags & GV_CROAK; | |
0dae17bd | 669 | |
547bb267 | 670 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_FLAGS; |
7918f24d | 671 | |
eff494dd | 672 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 | 673 | stash = NULL; |
c9bf4021 NC |
674 | else { |
675 | /* The only way stash can become NULL later on is if nsplit is set, | |
676 | which in turn means that there is no need for a SVt_PVHV case | |
677 | the error reporting code. */ | |
678 | } | |
b267980d | 679 | |
463ee0b2 | 680 | for (nend = name; *nend; nend++) { |
c94593d0 | 681 | if (*nend == '\'') { |
a0d0e21e | 682 | nsplit = nend; |
c94593d0 NC |
683 | name = nend + 1; |
684 | } | |
685 | else if (*nend == ':' && *(nend + 1) == ':') { | |
686 | nsplit = nend++; | |
687 | name = nend + 1; | |
688 | } | |
a0d0e21e LW |
689 | } |
690 | if (nsplit) { | |
7edbdc6b | 691 | if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) { |
9607fc9c | 692 | /* ->SUPER::method should really be looked up in original stash */ |
b37c2d43 | 693 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 | 694 | CopSTASHPV(PL_curcop))); |
af09ea45 | 695 | /* __PACKAGE__::SUPER stash should be autovivified */ |
7d3b1f61 | 696 | stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr)); |
cea2e8a9 | 697 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 | 698 | origname, HvNAME_get(stash), name) ); |
4633a7c4 | 699 | } |
e189a56d | 700 | else { |
af09ea45 | 701 | /* don't autovifify if ->NoSuchStash::method */ |
da51bb9b | 702 | stash = gv_stashpvn(origname, nsplit - origname, 0); |
e189a56d IK |
703 | |
704 | /* however, explicit calls to Pkg::SUPER::method may | |
705 | happen, and may require autovivification to work */ | |
706 | if (!stash && (nsplit - origname) >= 7 && | |
707 | strnEQ(nsplit - 7, "::SUPER", 7) && | |
da51bb9b | 708 | gv_stashpvn(origname, nsplit - origname - 7, 0)) |
7d3b1f61 | 709 | stash = gv_get_super_pkg(origname, nsplit - origname); |
e189a56d | 710 | } |
0dae17bd | 711 | ostash = stash; |
4633a7c4 LW |
712 | } |
713 | ||
9607fc9c | 714 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 715 | if (!gv) { |
2f6e0fe7 | 716 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
159b6efe | 717 | gv = MUTABLE_GV(&PL_sv_yes); |
dc848c6f | 718 | else if (autoload) |
0dae17bd | 719 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
256d1bb2 NC |
720 | if (!gv && do_croak) { |
721 | /* Right now this is exclusively for the benefit of S_method_common | |
722 | in pp_hot.c */ | |
723 | if (stash) { | |
15e6cdd9 DG |
724 | /* If we can't find an IO::File method, it might be a call on |
725 | * a filehandle. If IO:File has not been loaded, try to | |
726 | * require it first instead of croaking */ | |
727 | const char *stash_name = HvNAME_get(stash); | |
31b05a0f FR |
728 | if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File") |
729 | && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL, | |
730 | STR_WITH_LEN("IO/File.pm"), 0, | |
731 | HV_FETCH_ISEXISTS, NULL, 0) | |
15e6cdd9 | 732 | ) { |
31b05a0f | 733 | require_pv("IO/File.pm"); |
15e6cdd9 DG |
734 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
735 | if (gv) | |
736 | return gv; | |
737 | } | |
256d1bb2 NC |
738 | Perl_croak(aTHX_ |
739 | "Can't locate object method \"%s\" via package \"%.*s\"", | |
c49b597d | 740 | name, (int)HvNAMELEN_get(stash), HvNAME_get(stash)); |
256d1bb2 NC |
741 | } |
742 | else { | |
743 | STRLEN packlen; | |
744 | const char *packname; | |
745 | ||
256d1bb2 NC |
746 | if (nsplit) { |
747 | packlen = nsplit - origname; | |
748 | packname = origname; | |
256d1bb2 NC |
749 | } else { |
750 | packname = SvPV_const(error_report, packlen); | |
751 | } | |
752 | ||
753 | Perl_croak(aTHX_ | |
754 | "Can't locate object method \"%s\" via package \"%.*s\"" | |
755 | " (perhaps you forgot to load \"%.*s\"?)", | |
756 | name, (int)packlen, packname, (int)packlen, packname); | |
757 | } | |
758 | } | |
463ee0b2 | 759 | } |
dc848c6f | 760 | else if (autoload) { |
9d4ba2ae | 761 | CV* const cv = GvCV(gv); |
09280a33 CS |
762 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
763 | GV* stubgv; | |
764 | GV* autogv; | |
765 | ||
766 | if (CvANON(cv)) | |
767 | stubgv = gv; | |
768 | else { | |
769 | stubgv = CvGV(cv); | |
770 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
771 | stubgv = gv; | |
772 | } | |
773 | autogv = gv_autoload4(GvSTASH(stubgv), | |
774 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 775 | if (autogv) |
776 | gv = autogv; | |
777 | } | |
778 | } | |
44a8e56a | 779 | |
780 | return gv; | |
781 | } | |
782 | ||
783 | GV* | |
864dbfa3 | 784 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a | 785 | { |
27da23d5 | 786 | dVAR; |
44a8e56a | 787 | GV* gv; |
788 | CV* cv; | |
789 | HV* varstash; | |
790 | GV* vargv; | |
791 | SV* varsv; | |
e1ec3a88 | 792 | const char *packname = ""; |
eae70eaa | 793 | STRLEN packname_len = 0; |
44a8e56a | 794 | |
7918f24d NC |
795 | PERL_ARGS_ASSERT_GV_AUTOLOAD4; |
796 | ||
7edbdc6b | 797 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c | 798 | return NULL; |
0dae17bd GS |
799 | if (stash) { |
800 | if (SvTYPE(stash) < SVt_PVHV) { | |
ad64d0ec | 801 | packname = SvPV_const(MUTABLE_SV(stash), packname_len); |
5c284bb0 | 802 | stash = NULL; |
0dae17bd GS |
803 | } |
804 | else { | |
bfcb3514 | 805 | packname = HvNAME_get(stash); |
7423f6db | 806 | packname_len = HvNAMELEN_get(stash); |
0dae17bd GS |
807 | } |
808 | } | |
5c7983e5 | 809 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c | 810 | return NULL; |
dc848c6f | 811 | cv = GvCV(gv); |
812 | ||
adb5a9ae | 813 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 814 | return NULL; |
ed850460 | 815 | |
dc848c6f | 816 | /* |
817 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
818 | */ | |
041457d9 | 819 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
041457d9 | 820 | ) |
d1d15184 NC |
821 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
822 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", | |
823 | packname, (int)len, name); | |
44a8e56a | 824 | |
aed2304a | 825 | if (CvISXSUB(cv)) { |
adb5a9ae DM |
826 | /* rather than lookup/init $AUTOLOAD here |
827 | * only to have the XSUB do another lookup for $AUTOLOAD | |
828 | * and split that value on the last '::', | |
829 | * pass along the same data via some unused fields in the CV | |
830 | */ | |
c68d9564 | 831 | CvSTASH_set(cv, stash); |
f880fe2f | 832 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 | 833 | SvCUR_set(cv, len); |
adb5a9ae DM |
834 | return gv; |
835 | } | |
adb5a9ae | 836 | |
44a8e56a | 837 | /* |
838 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
839 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
840 | * use that, but for lack of anything better we will use the sub's | |
841 | * original package to look up $AUTOLOAD. | |
842 | */ | |
843 | varstash = GvSTASH(CvGV(cv)); | |
5c7983e5 | 844 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
845 | ENTER; |
846 | ||
c69033f2 | 847 | if (!isGV(vargv)) { |
5c7983e5 | 848 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 | 849 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 850 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
851 | #endif |
852 | } | |
3d35f11b | 853 | LEAVE; |
e203899d | 854 | varsv = GvSVn(vargv); |
7423f6db | 855 | sv_setpvn(varsv, packname, packname_len); |
396482e1 | 856 | sv_catpvs(varsv, "::"); |
d40bf27b NC |
857 | /* Ensure SvSETMAGIC() is called if necessary. In particular, to clear |
858 | tainting if $FOO::AUTOLOAD was previously tainted, but is not now. */ | |
859 | sv_catpvn_mg(varsv, name, len); | |
a0d0e21e LW |
860 | return gv; |
861 | } | |
862 | ||
44a2ac75 YO |
863 | |
864 | /* require_tie_mod() internal routine for requiring a module | |
486ec47a | 865 | * that implements the logic of automatic ties like %! and %- |
44a2ac75 YO |
866 | * |
867 | * The "gv" parameter should be the glob. | |
45cbc99a RGS |
868 | * "varpv" holds the name of the var, used for error messages. |
869 | * "namesv" holds the module name. Its refcount will be decremented. | |
44a2ac75 | 870 | * "methpv" holds the method name to test for to check that things |
45cbc99a RGS |
871 | * are working reasonably close to as expected. |
872 | * "flags": if flag & 1 then save the scalar before loading. | |
44a2ac75 YO |
873 | * For the protection of $! to work (it is set by this routine) |
874 | * the sv slot must already be magicalized. | |
d2c93421 | 875 | */ |
44a2ac75 YO |
876 | STATIC HV* |
877 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) | |
d2c93421 | 878 | { |
27da23d5 | 879 | dVAR; |
da51bb9b | 880 | HV* stash = gv_stashsv(namesv, 0); |
45cbc99a | 881 | |
7918f24d NC |
882 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
883 | ||
44a2ac75 | 884 | if (!stash || !(gv_fetchmethod(stash, methpv))) { |
45cbc99a RGS |
885 | SV *module = newSVsv(namesv); |
886 | char varname = *varpv; /* varpv might be clobbered by load_module, | |
887 | so save it. For the moment it's always | |
888 | a single char. */ | |
d2c93421 | 889 | dSP; |
d2c93421 | 890 | ENTER; |
44a2ac75 | 891 | if ( flags & 1 ) |
45cbc99a | 892 | save_scalar(gv); |
cac54379 | 893 | PUSHSTACKi(PERLSI_MAGIC); |
45cbc99a | 894 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
cac54379 | 895 | POPSTACK; |
d2c93421 RH |
896 | LEAVE; |
897 | SPAGAIN; | |
da51bb9b | 898 | stash = gv_stashsv(namesv, 0); |
44a2ac75 | 899 | if (!stash) |
45cbc99a RGS |
900 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available", |
901 | varname, SVfARG(namesv)); | |
902 | else if (!gv_fetchmethod(stash, methpv)) | |
903 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s", | |
904 | varname, SVfARG(namesv), methpv); | |
d2c93421 | 905 | } |
45cbc99a | 906 | SvREFCNT_dec(namesv); |
44a2ac75 | 907 | return stash; |
d2c93421 RH |
908 | } |
909 | ||
954c1994 GS |
910 | /* |
911 | =for apidoc gv_stashpv | |
912 | ||
da51bb9b | 913 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 914 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
915 | |
916 | =cut | |
917 | */ | |
918 | ||
a0d0e21e | 919 | HV* |
864dbfa3 | 920 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 921 | { |
7918f24d | 922 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 923 | return gv_stashpvn(name, strlen(name), create); |
924 | } | |
925 | ||
bc96cb06 SH |
926 | /* |
927 | =for apidoc gv_stashpvn | |
928 | ||
da51bb9b NC |
929 | Returns a pointer to the stash for a specified package. The C<namelen> |
930 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
931 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
932 | created if it does not already exist. If the package does not exist and | |
933 | C<flags> is 0 (or any other setting that does not create packages) then NULL | |
934 | is returned. | |
935 | ||
bc96cb06 SH |
936 | |
937 | =cut | |
938 | */ | |
939 | ||
dc437b57 | 940 | HV* |
da51bb9b | 941 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 942 | { |
0cea0058 | 943 | char smallbuf[128]; |
46fc3d4c | 944 | char *tmpbuf; |
a0d0e21e LW |
945 | HV *stash; |
946 | GV *tmpgv; | |
add0ecde | 947 | U32 tmplen = namelen + 2; |
dc437b57 | 948 | |
7918f24d NC |
949 | PERL_ARGS_ASSERT_GV_STASHPVN; |
950 | ||
add0ecde | 951 | if (tmplen <= sizeof smallbuf) |
46fc3d4c | 952 | tmpbuf = smallbuf; |
953 | else | |
add0ecde VP |
954 | Newx(tmpbuf, tmplen, char); |
955 | Copy(name, tmpbuf, namelen, char); | |
956 | tmpbuf[namelen] = ':'; | |
957 | tmpbuf[namelen+1] = ':'; | |
958 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); | |
46fc3d4c | 959 | if (tmpbuf != smallbuf) |
960 | Safefree(tmpbuf); | |
a0d0e21e | 961 | if (!tmpgv) |
da51bb9b | 962 | return NULL; |
a0d0e21e | 963 | stash = GvHV(tmpgv); |
1f656fcf | 964 | if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL; |
9efb5c72 | 965 | assert(stash); |
1f656fcf | 966 | if (!HvNAME_get(stash)) { |
1a063a89 | 967 | hv_name_set(stash, name, namelen, 0); |
1f656fcf FC |
968 | |
969 | /* FIXME: This is a repeat of logic in gv_fetchpvn_flags */ | |
970 | /* If the containing stash has multiple effective | |
971 | names, see that this one gets them, too. */ | |
972 | if (HvAUX(GvSTASH(tmpgv))->xhv_name_count) | |
973 | mro_package_moved(stash, NULL, tmpgv, 1); | |
974 | } | |
a0d0e21e | 975 | return stash; |
463ee0b2 LW |
976 | } |
977 | ||
954c1994 GS |
978 | /* |
979 | =for apidoc gv_stashsv | |
980 | ||
da51bb9b | 981 | Returns a pointer to the stash for a specified package. See C<gv_stashpvn>. |
954c1994 GS |
982 | |
983 | =cut | |
984 | */ | |
985 | ||
a0d0e21e | 986 | HV* |
da51bb9b | 987 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 988 | { |
dc437b57 | 989 | STRLEN len; |
9d4ba2ae | 990 | const char * const ptr = SvPV_const(sv,len); |
7918f24d NC |
991 | |
992 | PERL_ARGS_ASSERT_GV_STASHSV; | |
993 | ||
da51bb9b | 994 | return gv_stashpvn(ptr, len, flags); |
a0d0e21e LW |
995 | } |
996 | ||
997 | ||
463ee0b2 | 998 | GV * |
fe9845cc | 999 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) { |
7918f24d | 1000 | PERL_ARGS_ASSERT_GV_FETCHPV; |
b7787f18 | 1001 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
1002 | } |
1003 | ||
1004 | GV * | |
fe9845cc | 1005 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 1006 | STRLEN len; |
9d4ba2ae | 1007 | const char * const nambeg = SvPV_const(name, len); |
7918f24d | 1008 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
1009 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
1010 | } | |
1011 | ||
ad7cce9f | 1012 | STATIC void |
290a1700 | 1013 | S_gv_magicalize_isa(pTHX_ GV *gv) |
ad7cce9f FR |
1014 | { |
1015 | AV* av; | |
1016 | ||
1017 | PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA; | |
1018 | ||
1019 | av = GvAVn(gv); | |
1020 | GvMULTI_on(gv); | |
1021 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, | |
1022 | NULL, 0); | |
ad7cce9f FR |
1023 | } |
1024 | ||
1025 | STATIC void | |
26469672 | 1026 | S_gv_magicalize_overload(pTHX_ GV *gv) |
ad7cce9f FR |
1027 | { |
1028 | HV* hv; | |
1029 | ||
1030 | PERL_ARGS_ASSERT_GV_MAGICALIZE_OVERLOAD; | |
1031 | ||
1032 | hv = GvHVn(gv); | |
1033 | GvMULTI_on(gv); | |
1034 | hv_magic(hv, NULL, PERL_MAGIC_overload); | |
1035 | } | |
1036 | ||
4aaa4757 FC |
1037 | static void core_xsub(pTHX_ CV* cv); |
1038 | ||
7a5fd60d NC |
1039 | GV * |
1040 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
fe9845cc | 1041 | const svtype sv_type) |
79072805 | 1042 | { |
97aff369 | 1043 | dVAR; |
08105a92 | 1044 | register const char *name = nambeg; |
c445ea15 | 1045 | register GV *gv = NULL; |
79072805 | 1046 | GV**gvp; |
79072805 | 1047 | I32 len; |
b3d904f3 | 1048 | register const char *name_cursor; |
c445ea15 | 1049 | HV *stash = NULL; |
add2581e | 1050 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a | 1051 | const I32 no_expand = flags & GV_NOEXPAND; |
780a5241 | 1052 | const I32 add = flags & ~GV_NOADD_MASK; |
9da346da | 1053 | bool addmg = !!(flags & GV_ADDMG); |
b3d904f3 NC |
1054 | const char *const name_end = nambeg + full_len; |
1055 | const char *const name_em1 = name_end - 1; | |
5e0caaeb | 1056 | U32 faking_it; |
79072805 | 1057 | |
7918f24d NC |
1058 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; |
1059 | ||
fafc274c NC |
1060 | if (flags & GV_NOTQUAL) { |
1061 | /* Caller promised that there is no stash, so we can skip the check. */ | |
1062 | len = full_len; | |
1063 | goto no_stash; | |
1064 | } | |
1065 | ||
b208e10c NC |
1066 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
1067 | /* accidental stringify on a GV? */ | |
c07a80fd | 1068 | name++; |
b208e10c | 1069 | } |
c07a80fd | 1070 | |
b3d904f3 | 1071 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
46c0ec20 FC |
1072 | if (name_cursor < name_em1 && |
1073 | ((*name_cursor == ':' | |
b3d904f3 | 1074 | && name_cursor[1] == ':') |
46c0ec20 | 1075 | || *name_cursor == '\'')) |
463ee0b2 | 1076 | { |
463ee0b2 | 1077 | if (!stash) |
3280af22 | 1078 | stash = PL_defstash; |
dc437b57 | 1079 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c | 1080 | return NULL; |
463ee0b2 | 1081 | |
b3d904f3 | 1082 | len = name_cursor - name; |
088225fd | 1083 | if (name_cursor > nambeg) { /* Skip for initial :: or ' */ |
3a5b580c NC |
1084 | const char *key; |
1085 | if (*name_cursor == ':') { | |
1086 | key = name; | |
e771aaa9 NC |
1087 | len += 2; |
1088 | } else { | |
3a5b580c | 1089 | char *tmpbuf; |
2ae0db35 | 1090 | Newx(tmpbuf, len+2, char); |
e771aaa9 NC |
1091 | Copy(name, tmpbuf, len, char); |
1092 | tmpbuf[len++] = ':'; | |
1093 | tmpbuf[len++] = ':'; | |
3a5b580c | 1094 | key = tmpbuf; |
e771aaa9 | 1095 | } |
3a5b580c | 1096 | gvp = (GV**)hv_fetch(stash, key, len, add); |
a0714e2c | 1097 | gv = gvp ? *gvp : NULL; |
159b6efe | 1098 | if (gv && gv != (const GV *)&PL_sv_undef) { |
6fa846a0 | 1099 | if (SvTYPE(gv) != SVt_PVGV) |
3a5b580c | 1100 | gv_init(gv, stash, key, len, (add & GV_ADDMULTI)); |
6fa846a0 GS |
1101 | else |
1102 | GvMULTI_on(gv); | |
1103 | } | |
3a5b580c | 1104 | if (key != name) |
b9d2ea5b | 1105 | Safefree(key); |
159b6efe | 1106 | if (!gv || gv == (const GV *)&PL_sv_undef) |
a0714e2c | 1107 | return NULL; |
85e6fe83 | 1108 | |
463ee0b2 | 1109 | if (!(stash = GvHV(gv))) |
298d6511 | 1110 | { |
99ee9762 FC |
1111 | stash = GvHV(gv) = newHV(); |
1112 | if (!HvNAME_get(stash)) { | |
e058c50a FC |
1113 | if (GvSTASH(gv) == PL_defstash && len == 6 |
1114 | && strnEQ(name, "CORE", 4)) | |
1115 | hv_name_set(stash, "CORE", 4, 0); | |
1116 | else | |
1117 | hv_name_set( | |
1118 | stash, nambeg, name_cursor-nambeg, 0 | |
1119 | ); | |
99ee9762 FC |
1120 | /* If the containing stash has multiple effective |
1121 | names, see that this one gets them, too. */ | |
1122 | if (HvAUX(GvSTASH(gv))->xhv_name_count) | |
1123 | mro_package_moved(stash, NULL, gv, 1); | |
1124 | } | |
298d6511 | 1125 | } |
99ee9762 FC |
1126 | else if (!HvNAME_get(stash)) |
1127 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); | |
463ee0b2 LW |
1128 | } |
1129 | ||
b3d904f3 NC |
1130 | if (*name_cursor == ':') |
1131 | name_cursor++; | |
088225fd | 1132 | name = name_cursor+1; |
ad6bfa9d | 1133 | if (name == name_end) |
159b6efe NC |
1134 | return gv |
1135 | ? gv : MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); | |
79072805 | 1136 | } |
79072805 | 1137 | } |
b3d904f3 | 1138 | len = name_cursor - name; |
463ee0b2 LW |
1139 | |
1140 | /* No stash in name, so see how we can default */ | |
1141 | ||
1142 | if (!stash) { | |
fafc274c | 1143 | no_stash: |
8ccce9ae | 1144 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c | 1145 | bool global = FALSE; |
1146 | ||
8ccce9ae NC |
1147 | switch (len) { |
1148 | case 1: | |
18ea00d7 | 1149 | if (*name == '_') |
9d116dd7 | 1150 | global = TRUE; |
18ea00d7 | 1151 | break; |
8ccce9ae NC |
1152 | case 3: |
1153 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1154 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1155 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
9d116dd7 | 1156 | global = TRUE; |
18ea00d7 | 1157 | break; |
8ccce9ae NC |
1158 | case 4: |
1159 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1160 | && name[3] == 'V') | |
9d116dd7 | 1161 | global = TRUE; |
18ea00d7 | 1162 | break; |
8ccce9ae NC |
1163 | case 5: |
1164 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1165 | && name[3] == 'I' && name[4] == 'N') | |
463ee0b2 | 1166 | global = TRUE; |
18ea00d7 | 1167 | break; |
8ccce9ae NC |
1168 | case 6: |
1169 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1170 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1171 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
1172 | global = TRUE; | |
1173 | break; | |
1174 | case 7: | |
1175 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1176 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1177 | && name[6] == 'T') | |
18ea00d7 NC |
1178 | global = TRUE; |
1179 | break; | |
463ee0b2 | 1180 | } |
9607fc9c | 1181 | |
463ee0b2 | 1182 | if (global) |
3280af22 | 1183 | stash = PL_defstash; |
923e4eb5 | 1184 | else if (IN_PERL_COMPILETIME) { |
3280af22 NIS |
1185 | stash = PL_curstash; |
1186 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
748a9306 LW |
1187 | sv_type != SVt_PVCV && |
1188 | sv_type != SVt_PVGV && | |
4633a7c4 | 1189 | sv_type != SVt_PVFM && |
c07a80fd | 1190 | sv_type != SVt_PVIO && |
70ec6265 NC |
1191 | !(len == 1 && sv_type == SVt_PV && |
1192 | (*name == 'a' || *name == 'b')) ) | |
748a9306 | 1193 | { |
4633a7c4 LW |
1194 | gvp = (GV**)hv_fetch(stash,name,len,0); |
1195 | if (!gvp || | |
159b6efe | 1196 | *gvp == (const GV *)&PL_sv_undef || |
a5f75d66 AD |
1197 | SvTYPE(*gvp) != SVt_PVGV) |
1198 | { | |
d4c19fe8 | 1199 | stash = NULL; |
a5f75d66 | 1200 | } |
155aba94 GS |
1201 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
1202 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1203 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
4633a7c4 | 1204 | { |
fe13d51d | 1205 | /* diag_listed_as: Variable "%s" is not imported%s */ |
413ff9f6 FC |
1206 | Perl_ck_warner_d( |
1207 | aTHX_ packWARN(WARN_MISC), | |
1208 | "Variable \"%c%s\" is not imported", | |
4633a7c4 LW |
1209 | sv_type == SVt_PVAV ? '@' : |
1210 | sv_type == SVt_PVHV ? '%' : '$', | |
1211 | name); | |
8ebc5c01 | 1212 | if (GvCVu(*gvp)) |
413ff9f6 FC |
1213 | Perl_ck_warner_d( |
1214 | aTHX_ packWARN(WARN_MISC), | |
1215 | "\t(Did you mean &%s instead?)\n", name | |
1216 | ); | |
d4c19fe8 | 1217 | stash = NULL; |
4633a7c4 | 1218 | } |
a0d0e21e | 1219 | } |
85e6fe83 | 1220 | } |
463ee0b2 | 1221 | else |
1d7c1841 | 1222 | stash = CopSTASH(PL_curcop); |
463ee0b2 LW |
1223 | } |
1224 | else | |
3280af22 | 1225 | stash = PL_defstash; |
463ee0b2 LW |
1226 | } |
1227 | ||
1228 | /* By this point we should have a stash and a name */ | |
1229 | ||
a0d0e21e | 1230 | if (!stash) { |
5a844595 | 1231 | if (add) { |
9d4ba2ae | 1232 | SV * const err = Perl_mess(aTHX_ |
5a844595 GS |
1233 | "Global symbol \"%s%s\" requires explicit package name", |
1234 | (sv_type == SVt_PV ? "$" | |
1235 | : sv_type == SVt_PVAV ? "@" | |
1236 | : sv_type == SVt_PVHV ? "%" | |
608b3986 | 1237 | : ""), name); |
e7f343b6 | 1238 | GV *gv; |
608b3986 AE |
1239 | if (USE_UTF8_IN_NAMES) |
1240 | SvUTF8_on(err); | |
1241 | qerror(err); | |
76f68e9b | 1242 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
e7f343b6 NC |
1243 | if(!gv) { |
1244 | /* symbol table under destruction */ | |
1245 | return NULL; | |
1246 | } | |
1247 | stash = GvHV(gv); | |
a0d0e21e | 1248 | } |
d7aacf4e | 1249 | else |
a0714e2c | 1250 | return NULL; |
a0d0e21e LW |
1251 | } |
1252 | ||
1253 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
a0714e2c | 1254 | return NULL; |
a0d0e21e | 1255 | |
79072805 | 1256 | gvp = (GV**)hv_fetch(stash,name,len,add); |
23496c6e FC |
1257 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) { |
1258 | if (addmg) gv = (GV *)newSV(0); | |
1259 | else return NULL; | |
1260 | } | |
1261 | else gv = *gvp; | |
79072805 | 1262 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e | 1263 | if (add) { |
a5f75d66 | 1264 | GvMULTI_on(gv); |
a0d0e21e | 1265 | gv_init_sv(gv, sv_type); |
ccdda9cb NC |
1266 | if (len == 1 && stash == PL_defstash |
1267 | && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) { | |
44a2ac75 YO |
1268 | if (*name == '!') |
1269 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); | |
45cbc99a | 1270 | else if (*name == '-' || *name == '+') |
192b9cd1 | 1271 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
45cbc99a | 1272 | } |
af16de9f FC |
1273 | else if (len == 3 && sv_type == SVt_PVAV |
1274 | && strnEQ(name, "ISA", 3) | |
1275 | && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv)))) | |
1276 | gv_magicalize_isa(gv); | |
a0d0e21e | 1277 | } |
79072805 | 1278 | return gv; |
add2581e | 1279 | } else if (no_init) { |
23496c6e | 1280 | assert(!addmg); |
55d729e4 | 1281 | return gv; |
e26df76a | 1282 | } else if (no_expand && SvROK(gv)) { |
23496c6e | 1283 | assert(!addmg); |
e26df76a | 1284 | return gv; |
79072805 | 1285 | } |
93a17b20 | 1286 | |
5e0caaeb NC |
1287 | /* Adding a new symbol. |
1288 | Unless of course there was already something non-GV here, in which case | |
1289 | we want to behave as if there was always a GV here, containing some sort | |
1290 | of subroutine. | |
1291 | Otherwise we run the risk of creating things like GvIO, which can cause | |
1292 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
1293 | ||
1294 | faking_it = SvOK(gv); | |
93a17b20 | 1295 | |
9b387841 NC |
1296 | if (add & GV_ADDWARN) |
1297 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); | |
55d729e4 | 1298 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
93a17b20 | 1299 | |
a0288114 | 1300 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d | 1301 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 PM |
1302 | GvMULTI_on(gv) ; |
1303 | ||
93a17b20 | 1304 | /* set up magic where warranted */ |
44428a46 FC |
1305 | if (stash != PL_defstash) { /* not the main stash */ |
1306 | /* We only have to check for four names here: EXPORT, ISA, OVERLOAD | |
4aaa4757 FC |
1307 | and VERSION. All the others apply only to the main stash or to |
1308 | CORE (which is checked right after this). */ | |
f4e68e82 | 1309 | if (len > 2) { |
b464bac0 | 1310 | const char * const name2 = name + 1; |
cc4c2da6 | 1311 | switch (*name) { |
cc4c2da6 NC |
1312 | case 'E': |
1313 | if (strnEQ(name2, "XPORT", 5)) | |
1314 | GvMULTI_on(gv); | |
1315 | break; | |
1316 | case 'I': | |
44428a46 | 1317 | if (strEQ(name2, "SA")) |
290a1700 | 1318 | gv_magicalize_isa(gv); |
cc4c2da6 NC |
1319 | break; |
1320 | case 'O': | |
44428a46 | 1321 | if (strEQ(name2, "VERLOAD")) |
ad7cce9f | 1322 | gv_magicalize_overload(gv); |
cc4c2da6 | 1323 | break; |
44428a46 FC |
1324 | case 'V': |
1325 | if (strEQ(name2, "ERSION")) | |
1326 | GvMULTI_on(gv); | |
1327 | break; | |
4aaa4757 FC |
1328 | default: |
1329 | goto try_core; | |
1330 | } | |
23496c6e | 1331 | goto add_magical_gv; |
4aaa4757 FC |
1332 | } |
1333 | try_core: | |
1334 | if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) { | |
1335 | /* Avoid null warning: */ | |
1336 | const char * const stashname = HvNAME(stash); assert(stashname); | |
1337 | if (strnEQ(stashname, "CORE", 4)) { | |
1338 | const int code = keyword(name, len, 1); | |
1339 | static const char file[] = __FILE__; | |
7fa5bd9b | 1340 | CV *cv, *oldcompcv; |
4aaa4757 FC |
1341 | int opnum = 0; |
1342 | SV *opnumsv; | |
a652020e | 1343 | bool ampable = TRUE; /* &{}-able */ |
7fa5bd9b FC |
1344 | COP *oldcurcop; |
1345 | yy_parser *oldparser; | |
1346 | I32 oldsavestack_ix; | |
1347 | ||
23496c6e | 1348 | if (code >= 0) goto add_magical_gv; /* not overridable */ |
7fa5bd9b | 1349 | switch (-code) { |
4aaa4757 | 1350 | /* no support for \&CORE::infix; |
4aaa4757 FC |
1351 | no support for funcs that take labels, as their parsing is |
1352 | weird */ | |
4aaa4757 FC |
1353 | case KEY_and: case KEY_cmp: case KEY_CORE: case KEY_dump: |
1354 | case KEY_eq: case KEY_ge: | |
0bbad748 | 1355 | case KEY_gt: case KEY_le: case KEY_lt: case KEY_ne: |
4aaa4757 | 1356 | case KEY_or: case KEY_x: case KEY_xor: |
23496c6e | 1357 | goto add_magical_gv; |
ce0b554b | 1358 | case KEY_chdir: |
bf0571fd | 1359 | case KEY_chomp: case KEY_chop: |
9d3c658e | 1360 | case KEY_each: case KEY_eof: case KEY_exec: |
d3e26383 | 1361 | case KEY_keys: |
c72a5629 | 1362 | case KEY_lstat: |
3e6568b4 | 1363 | case KEY_pop: |
f650fa72 | 1364 | case KEY_push: |
92f2ac5f | 1365 | case KEY_shift: |
bf0571fd | 1366 | case KEY_splice: |
7bc95ae1 | 1367 | case KEY_stat: |
1ed240b7 | 1368 | case KEY_system: |
58536d15 | 1369 | case KEY_truncate: case KEY_unlink: |
d6d78e19 | 1370 | case KEY_unshift: |
96db40ac | 1371 | case KEY_values: |
a652020e | 1372 | ampable = FALSE; |
44428a46 | 1373 | } |
7fa5bd9b FC |
1374 | if (ampable) { |
1375 | ENTER; | |
1376 | oldcurcop = PL_curcop; | |
1377 | oldparser = PL_parser; | |
1378 | lex_start(NULL, NULL, 0); | |
1379 | oldcompcv = PL_compcv; | |
1380 | PL_compcv = NULL; /* Prevent start_subparse from setting | |
1381 | CvOUTSIDE. */ | |
1382 | oldsavestack_ix = start_subparse(FALSE,0); | |
1383 | cv = PL_compcv; | |
1384 | } | |
1385 | else { | |
1386 | /* Avoid calling newXS, as it calls us, and things start to | |
1387 | get hairy. */ | |
1388 | cv = MUTABLE_CV(newSV_type(SVt_PVCV)); | |
1389 | GvCV_set(gv,cv); | |
1390 | GvCVGEN(gv) = 0; | |
1391 | mro_method_changed_in(GvSTASH(gv)); | |
1392 | CvISXSUB_on(cv); | |
1393 | CvXSUB(cv) = core_xsub; | |
1394 | } | |
1395 | CvGV_set(cv, gv); /* This stops new ATTRSUB from setting CvFILE | |
1396 | from PL_curcop. */ | |
4aaa4757 FC |
1397 | (void)gv_fetchfile(file); |
1398 | CvFILE(cv) = (char *)file; | |
7fa5bd9b FC |
1399 | /* XXX This is inefficient, as doing things this order causes |
1400 | a prototype check in newATTRSUB. But we have to do | |
1401 | it this order as we need an op number before calling | |
1402 | new ATTRSUB. */ | |
b66130dd | 1403 | (void)core_prototype((SV *)cv, name, code, &opnum); |
7fa5bd9b | 1404 | if (ampable) { |
9da346da | 1405 | if (addmg) { |
0f43181e | 1406 | (void)hv_store(stash,name,len,(SV *)gv,0); |
9da346da FC |
1407 | addmg = FALSE; |
1408 | } | |
f3ab9a22 | 1409 | CvLVALUE_on(cv); |
7fa5bd9b FC |
1410 | newATTRSUB(oldsavestack_ix, |
1411 | newSVOP( | |
1412 | OP_CONST, 0, | |
1413 | newSVpvn_share(nambeg,full_len,0) | |
1414 | ), | |
1e4b6aa1 FC |
1415 | NULL,NULL, |
1416 | coresub_op( | |
1417 | opnum | |
1418 | ? newSVuv((UV)opnum) | |
1419 | : newSVpvn(name,len), | |
1420 | code, opnum | |
1421 | ) | |
7fa5bd9b FC |
1422 | ); |
1423 | assert(GvCV(gv) == cv); | |
f3ab9a22 | 1424 | if (opnum != OP_VEC && opnum != OP_SUBSTR) |
c72a5629 | 1425 | CvLVALUE_off(cv); /* Now *that* was a neat trick. */ |
7fa5bd9b FC |
1426 | LEAVE; |
1427 | PL_parser = oldparser; | |
1428 | PL_curcop = oldcurcop; | |
1429 | PL_compcv = oldcompcv; | |
1430 | } | |
4aaa4757 FC |
1431 | opnumsv = opnum ? newSVuv((UV)opnum) : (SV *)NULL; |
1432 | cv_set_call_checker( | |
1433 | cv, Perl_ck_entersub_args_core, opnumsv ? opnumsv : (SV *)cv | |
1434 | ); | |
1435 | SvREFCNT_dec(opnumsv); | |
1436 | } | |
44428a46 FC |
1437 | } |
1438 | } | |
1439 | else if (len > 1) { | |
1440 | #ifndef EBCDIC | |
1441 | if (*name > 'V' ) { | |
1442 | NOOP; | |
1443 | /* Nothing else to do. | |
1444 | The compiler will probably turn the switch statement into a | |
1445 | branch table. Make sure we avoid even that small overhead for | |
1446 | the common case of lower case variable names. */ | |
1447 | } else | |
1448 | #endif | |
1449 | { | |
1450 | const char * const name2 = name + 1; | |
1451 | switch (*name) { | |
1452 | case 'A': | |
1453 | if (strEQ(name2, "RGV")) { | |
1454 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
1455 | } | |
1456 | else if (strEQ(name2, "RGVOUT")) { | |
1457 | GvMULTI_on(gv); | |
1458 | } | |
1459 | break; | |
1460 | case 'E': | |
1461 | if (strnEQ(name2, "XPORT", 5)) | |
1462 | GvMULTI_on(gv); | |
1463 | break; | |
1464 | case 'I': | |
1465 | if (strEQ(name2, "SA")) { | |
290a1700 | 1466 | gv_magicalize_isa(gv); |
44428a46 FC |
1467 | } |
1468 | break; | |
1469 | case 'O': | |
1470 | if (strEQ(name2, "VERLOAD")) { | |
ad7cce9f | 1471 | gv_magicalize_overload(gv); |
44428a46 FC |
1472 | } |
1473 | break; | |
cc4c2da6 NC |
1474 | case 'S': |
1475 | if (strEQ(name2, "IG")) { | |
1476 | HV *hv; | |
1477 | I32 i; | |
d525a7b2 NC |
1478 | if (!PL_psig_name) { |
1479 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); | |
a02a5408 | 1480 | Newxz(PL_psig_pend, SIG_SIZE, int); |
d525a7b2 | 1481 | PL_psig_ptr = PL_psig_name + SIG_SIZE; |
0bdedcb3 NC |
1482 | } else { |
1483 | /* I think that the only way to get here is to re-use an | |
1484 | embedded perl interpreter, where the previous | |
1485 | use didn't clean up fully because | |
1486 | PL_perl_destruct_level was 0. I'm not sure that we | |
1487 | "support" that, in that I suspect in that scenario | |
1488 | there are sufficient other garbage values left in the | |
1489 | interpreter structure that something else will crash | |
1490 | before we get here. I suspect that this is one of | |
1491 | those "doctor, it hurts when I do this" bugs. */ | |
d525a7b2 | 1492 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); |
0bdedcb3 | 1493 | Zero(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 NC |
1494 | } |
1495 | GvMULTI_on(gv); | |
1496 | hv = GvHVn(gv); | |
a0714e2c | 1497 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 1498 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 1499 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
1500 | if (init) |
1501 | sv_setsv(*init, &PL_sv_undef); | |
cc4c2da6 NC |
1502 | } |
1503 | } | |
1504 | break; | |
1505 | case 'V': | |
1506 | if (strEQ(name2, "ERSION")) | |
1507 | GvMULTI_on(gv); | |
1508 | break; | |
e5218da5 GA |
1509 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1510 | if (strEQ(name2, "HILD_ERROR_NATIVE")) | |
1511 | goto magicalize; | |
1512 | break; | |
cc4c2da6 NC |
1513 | case '\005': /* $^ENCODING */ |
1514 | if (strEQ(name2, "NCODING")) | |
1515 | goto magicalize; | |
1516 | break; | |
9ebf26ad FR |
1517 | case '\007': /* $^GLOBAL_PHASE */ |
1518 | if (strEQ(name2, "LOBAL_PHASE")) | |
1519 | goto ro_magicalize; | |
1520 | break; | |
cde0cee5 YO |
1521 | case '\015': /* $^MATCH */ |
1522 | if (strEQ(name2, "ATCH")) | |
2fdbfb4d | 1523 | goto magicalize; |
cc4c2da6 NC |
1524 | case '\017': /* $^OPEN */ |
1525 | if (strEQ(name2, "PEN")) | |
1526 | goto magicalize; | |
1527 | break; | |
cde0cee5 YO |
1528 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
1529 | if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH")) | |
9ebf26ad FR |
1530 | goto magicalize; |
1531 | break; | |
cc4c2da6 NC |
1532 | case '\024': /* ${^TAINT} */ |
1533 | if (strEQ(name2, "AINT")) | |
1534 | goto ro_magicalize; | |
1535 | break; | |
7cebcbc0 | 1536 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 | 1537 | if (strEQ(name2, "NICODE")) |
cc4c2da6 | 1538 | goto ro_magicalize; |
a0288114 | 1539 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 | 1540 | goto ro_magicalize; |
e07ea26a NC |
1541 | if (strEQ(name2, "TF8CACHE")) |
1542 | goto magicalize; | |
cc4c2da6 NC |
1543 | break; |
1544 | case '\027': /* $^WARNING_BITS */ | |
1545 | if (strEQ(name2, "ARNING_BITS")) | |
1546 | goto magicalize; | |
1547 | break; | |
1548 | case '1': | |
1549 | case '2': | |
1550 | case '3': | |
1551 | case '4': | |
1552 | case '5': | |
1553 | case '6': | |
1554 | case '7': | |
1555 | case '8': | |
1556 | case '9': | |
85e6fe83 | 1557 | { |
2fdbfb4d AB |
1558 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
1559 | this test */ | |
1560 | /* This snippet is taken from is_gv_magical */ | |
cc4c2da6 NC |
1561 | const char *end = name + len; |
1562 | while (--end > name) { | |
23496c6e | 1563 | if (!isDIGIT(*end)) goto add_magical_gv; |
cc4c2da6 | 1564 | } |
2fdbfb4d | 1565 | goto magicalize; |
1d7c1841 | 1566 | } |
dc437b57 | 1567 | } |
93a17b20 | 1568 | } |
392db708 NC |
1569 | } else { |
1570 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
1571 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 | 1572 | switch (*name) { |
6361f656 AB |
1573 | case '&': /* $& */ |
1574 | case '`': /* $` */ | |
1575 | case '\'': /* $' */ | |
cc4c2da6 NC |
1576 | if ( |
1577 | sv_type == SVt_PVAV || | |
1578 | sv_type == SVt_PVHV || | |
1579 | sv_type == SVt_PVCV || | |
1580 | sv_type == SVt_PVFM || | |
1581 | sv_type == SVt_PVIO | |
1582 | ) { break; } | |
1583 | PL_sawampersand = TRUE; | |
2fdbfb4d | 1584 | goto magicalize; |
cc4c2da6 | 1585 | |
6361f656 | 1586 | case ':': /* $: */ |
c69033f2 | 1587 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
1588 | goto magicalize; |
1589 | ||
6361f656 | 1590 | case '?': /* $? */ |
ff0cee69 | 1591 | #ifdef COMPLEX_STATUS |
c69033f2 | 1592 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 1593 | #endif |
cc4c2da6 | 1594 | goto magicalize; |
ff0cee69 | 1595 | |
6361f656 | 1596 | case '!': /* $! */ |
67261566 | 1597 | GvMULTI_on(gv); |
44a2ac75 | 1598 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 1599 | |
ad64d0ec | 1600 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 | 1601 | |
44a2ac75 | 1602 | /* magicalization must be done before require_tie_mod is called */ |
67261566 | 1603 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
44a2ac75 | 1604 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
d2c93421 | 1605 | |
6cef1e77 | 1606 | break; |
6361f656 AB |
1607 | case '-': /* $- */ |
1608 | case '+': /* $+ */ | |
44a2ac75 YO |
1609 | GvMULTI_on(gv); /* no used once warnings here */ |
1610 | { | |
44a2ac75 | 1611 | AV* const av = GvAVn(gv); |
ad64d0ec | 1612 | SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL; |
44a2ac75 | 1613 | |
ad64d0ec NC |
1614 | sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0); |
1615 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
67261566 | 1616 | if (avc) |
44a2ac75 | 1617 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 | 1618 | SvREADONLY_on(av); |
67261566 YO |
1619 | |
1620 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
192b9cd1 | 1621 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
67261566 | 1622 | |
80305961 | 1623 | break; |
cc4c2da6 | 1624 | } |
6361f656 AB |
1625 | case '*': /* $* */ |
1626 | case '#': /* $# */ | |
9b387841 NC |
1627 | if (sv_type == SVt_PV) |
1628 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), | |
1629 | "$%c is no longer supported", *name); | |
8ae1fe26 | 1630 | break; |
6361f656 | 1631 | case '|': /* $| */ |
c69033f2 | 1632 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 NC |
1633 | goto magicalize; |
1634 | ||
b3ca2e83 NC |
1635 | case '\010': /* $^H */ |
1636 | { | |
1637 | HV *const hv = GvHVn(gv); | |
1638 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
1639 | } | |
1640 | goto magicalize; | |
cc4c2da6 | 1641 | case '\023': /* $^S */ |
2fdbfb4d AB |
1642 | ro_magicalize: |
1643 | SvREADONLY_on(GvSVn(gv)); | |
1644 | /* FALL THROUGH */ | |
6361f656 AB |
1645 | case '0': /* $0 */ |
1646 | case '1': /* $1 */ | |
1647 | case '2': /* $2 */ | |
1648 | case '3': /* $3 */ | |
1649 | case '4': /* $4 */ | |
1650 | case '5': /* $5 */ | |
1651 | case '6': /* $6 */ | |
1652 | case '7': /* $7 */ | |
1653 | case '8': /* $8 */ | |
1654 | case '9': /* $9 */ | |
1655 | case '[': /* $[ */ | |
1656 | case '^': /* $^ */ | |
1657 | case '~': /* $~ */ | |
1658 | case '=': /* $= */ | |
1659 | case '%': /* $% */ | |
1660 | case '.': /* $. */ | |
1661 | case '(': /* $( */ | |
1662 | case ')': /* $) */ | |
1663 | case '<': /* $< */ | |
1664 | case '>': /* $> */ | |
1665 | case '\\': /* $\ */ | |
1666 | case '/': /* $/ */ | |
9cdac2a2 | 1667 | case '$': /* $$ */ |
cc4c2da6 NC |
1668 | case '\001': /* $^A */ |
1669 | case '\003': /* $^C */ | |
1670 | case '\004': /* $^D */ | |
1671 | case '\005': /* $^E */ | |
1672 | case '\006': /* $^F */ | |
cc4c2da6 NC |
1673 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1674 | case '\016': /* $^N */ | |
1675 | case '\017': /* $^O */ | |
1676 | case '\020': /* $^P */ | |
1677 | case '\024': /* $^T */ | |
1678 | case '\027': /* $^W */ | |
1679 | magicalize: | |
ad64d0ec | 1680 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
cc4c2da6 | 1681 | break; |
e521374c | 1682 | |
cc4c2da6 | 1683 | case '\014': /* $^L */ |
76f68e9b | 1684 | sv_setpvs(GvSVn(gv),"\f"); |
c69033f2 | 1685 | PL_formfeed = GvSVn(gv); |
463ee0b2 | 1686 | break; |
6361f656 | 1687 | case ';': /* $; */ |
76f68e9b | 1688 | sv_setpvs(GvSVn(gv),"\034"); |
463ee0b2 | 1689 | break; |
6361f656 | 1690 | case ']': /* $] */ |
cc4c2da6 | 1691 | { |
3638bf15 | 1692 | SV * const sv = GvSV(gv); |
d7aa5382 | 1693 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 1694 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
1695 | GvSV(gv) = vnumify(PL_patchlevel); |
1696 | SvREADONLY_on(GvSV(gv)); | |
1697 | SvREFCNT_dec(sv); | |
93a17b20 LW |
1698 | } |
1699 | break; | |
cc4c2da6 NC |
1700 | case '\026': /* $^V */ |
1701 | { | |
3638bf15 | 1702 | SV * const sv = GvSV(gv); |
f9be5ac8 DM |
1703 | GvSV(gv) = new_version(PL_patchlevel); |
1704 | SvREADONLY_on(GvSV(gv)); | |
1705 | SvREFCNT_dec(sv); | |
16070b82 GS |
1706 | } |
1707 | break; | |
cc4c2da6 | 1708 | } |
79072805 | 1709 | } |
23496c6e FC |
1710 | add_magical_gv: |
1711 | if (addmg) { | |
1712 | if (GvAV(gv) || GvHV(gv) || GvIO(gv) || GvCV(gv) || ( | |
1713 | GvSV(gv) && (SvOK(GvSV(gv)) || SvMAGICAL(GvSV(gv))) | |
1714 | )) | |
0f43181e | 1715 | (void)hv_store(stash,name,len,(SV *)gv,0); |
23496c6e FC |
1716 | else SvREFCNT_dec(gv), gv = NULL; |
1717 | } | |
1718 | if (gv) gv_init_sv(gv, faking_it ? SVt_PVCV : sv_type); | |
93a17b20 | 1719 | return gv; |
79072805 LW |
1720 | } |
1721 | ||
1722 | void | |
35a4481c | 1723 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1724 | { |
35a4481c | 1725 | const char *name; |
7423f6db | 1726 | STRLEN namelen; |
35a4481c | 1727 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
1728 | |
1729 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
1730 | ||
43693395 | 1731 | if (!hv) { |
0c34ef67 | 1732 | SvOK_off(sv); |
43693395 GS |
1733 | return; |
1734 | } | |
666ea192 | 1735 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 1736 | |
bfcb3514 | 1737 | name = HvNAME_get(hv); |
7423f6db NC |
1738 | if (name) { |
1739 | namelen = HvNAMELEN_get(hv); | |
1740 | } else { | |
e27ad1f2 | 1741 | name = "__ANON__"; |
7423f6db NC |
1742 | namelen = 8; |
1743 | } | |
a0288114 | 1744 | |
e27ad1f2 | 1745 | if (keepmain || strNE(name, "main")) { |
7423f6db | 1746 | sv_catpvn(sv,name,namelen); |
396482e1 | 1747 | sv_catpvs(sv,"::"); |
43693395 | 1748 | } |
257984c0 | 1749 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 GS |
1750 | } |
1751 | ||
1752 | void | |
35a4481c | 1753 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1754 | { |
099be4f1 | 1755 | const GV * const egv = GvEGVx(gv); |
7918f24d NC |
1756 | |
1757 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
1758 | ||
46c461b5 | 1759 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
1760 | } |
1761 | ||
79072805 | 1762 | void |
1146e912 | 1763 | Perl_gv_check(pTHX_ const HV *stash) |
79072805 | 1764 | { |
97aff369 | 1765 | dVAR; |
79072805 | 1766 | register I32 i; |
463ee0b2 | 1767 | |
7918f24d NC |
1768 | PERL_ARGS_ASSERT_GV_CHECK; |
1769 | ||
8990e307 LW |
1770 | if (!HvARRAY(stash)) |
1771 | return; | |
a0d0e21e | 1772 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 1773 | const HE *entry; |
dc437b57 | 1774 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 AL |
1775 | register GV *gv; |
1776 | HV *hv; | |
dc437b57 | 1777 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
159b6efe | 1778 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 1779 | { |
19b6c847 | 1780 | if (hv != PL_defstash && hv != stash) |
a0d0e21e LW |
1781 | gv_check(hv); /* nested package */ |
1782 | } | |
dc437b57 | 1783 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 | 1784 | const char *file; |
159b6efe | 1785 | gv = MUTABLE_GV(HeVAL(entry)); |
55d729e4 | 1786 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 1787 | continue; |
1d7c1841 | 1788 | file = GvFILE(gv); |
1d7c1841 GS |
1789 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1790 | #ifdef USE_ITHREADS | |
dd374669 | 1791 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 | 1792 | #else |
9bde8eb0 NC |
1793 | CopFILEGV(PL_curcop) |
1794 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
1d7c1841 | 1795 | #endif |
9014280d | 1796 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 | 1797 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 | 1798 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 | 1799 | } |
79072805 LW |
1800 | } |
1801 | } | |
1802 | } | |
1803 | ||
1804 | GV * | |
e1ec3a88 | 1805 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 | 1806 | { |
97aff369 | 1807 | dVAR; |
7918f24d NC |
1808 | |
1809 | PERL_ARGS_ASSERT_NEWGVGEN; | |
1810 | ||
cea2e8a9 | 1811 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 | 1812 | GV_ADD, SVt_PVGV); |
79072805 LW |
1813 | } |
1814 | ||
1815 | /* hopefully this is only called on local symbol table entries */ | |
1816 | ||
1817 | GP* | |
864dbfa3 | 1818 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 1819 | { |
97aff369 | 1820 | dVAR; |
1d7c1841 | 1821 | if (!gp) |
d4c19fe8 | 1822 | return NULL; |
79072805 | 1823 | gp->gp_refcnt++; |
44a8e56a | 1824 | if (gp->gp_cv) { |
1825 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
1826 | /* If the GP they asked for a reference to contains |
1827 | a method cache entry, clear it first, so that we | |
1828 | don't infect them with our cached entry */ | |
44a8e56a | 1829 | SvREFCNT_dec(gp->gp_cv); |
601f1833 | 1830 | gp->gp_cv = NULL; |
44a8e56a | 1831 | gp->gp_cvgen = 0; |
1832 | } | |
44a8e56a | 1833 | } |
79072805 | 1834 | return gp; |
79072805 LW |
1835 | } |
1836 | ||
1837 | void | |
864dbfa3 | 1838 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 1839 | { |
97aff369 | 1840 | dVAR; |
79072805 | 1841 | GP* gp; |
b0d55c99 | 1842 | int attempts = 100; |
79072805 | 1843 | |
f7877b28 | 1844 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 1845 | return; |
f248d071 | 1846 | if (gp->gp_refcnt == 0) { |
9b387841 NC |
1847 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
1848 | "Attempt to free unreferenced glob pointers" | |
1849 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
1850 | return; |
1851 | } | |
748a9306 LW |
1852 | if (--gp->gp_refcnt > 0) { |
1853 | if (gp->gp_egv == gv) | |
1854 | gp->gp_egv = 0; | |
c43ae56f | 1855 | GvGP_set(gv, NULL); |
79072805 | 1856 | return; |
748a9306 | 1857 | } |
79072805 | 1858 | |
b0d55c99 FC |
1859 | while (1) { |
1860 | /* Copy and null out all the glob slots, so destructors do not see | |
1861 | freed SVs. */ | |
1862 | HEK * const file_hek = gp->gp_file_hek; | |
1863 | SV * const sv = gp->gp_sv; | |
1864 | AV * const av = gp->gp_av; | |
1865 | HV * const hv = gp->gp_hv; | |
1866 | IO * const io = gp->gp_io; | |
1867 | CV * const cv = gp->gp_cv; | |
1868 | CV * const form = gp->gp_form; | |
1869 | ||
1870 | gp->gp_file_hek = NULL; | |
1871 | gp->gp_sv = NULL; | |
1872 | gp->gp_av = NULL; | |
1873 | gp->gp_hv = NULL; | |
1874 | gp->gp_io = NULL; | |
1875 | gp->gp_cv = NULL; | |
1876 | gp->gp_form = NULL; | |
1877 | ||
1878 | if (file_hek) | |
1879 | unshare_hek(file_hek); | |
1880 | ||
1881 | SvREFCNT_dec(sv); | |
1882 | SvREFCNT_dec(av); | |
1883 | /* FIXME - another reference loop GV -> symtab -> GV ? | |
1884 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
1885 | if (hv && SvTYPE(hv) == SVt_PVHV) { | |
1886 | const char *hvname = HvNAME_get(hv); | |
bfcb3514 | 1887 | if (PL_stashcache && hvname) |
b0d55c99 | 1888 | (void)hv_delete(PL_stashcache, hvname, HvNAMELEN_get(hv), |
7423f6db | 1889 | G_DISCARD); |
b0d55c99 FC |
1890 | SvREFCNT_dec(hv); |
1891 | } | |
1892 | SvREFCNT_dec(io); | |
1893 | SvREFCNT_dec(cv); | |
1894 | SvREFCNT_dec(form); | |
1895 | ||
1896 | if (!gp->gp_file_hek | |
1897 | && !gp->gp_sv | |
1898 | && !gp->gp_av | |
1899 | && !gp->gp_hv | |
1900 | && !gp->gp_io | |
1901 | && !gp->gp_cv | |
1902 | && !gp->gp_form) break; | |
1903 | ||
1904 | if (--attempts == 0) { | |
1905 | Perl_die(aTHX_ | |
1906 | "panic: gp_free failed to free glob pointer - " | |
1907 | "something is repeatedly re-creating entries" | |
1908 | ); | |
1909 | } | |
13207a71 | 1910 | } |
748a9306 | 1911 | |
79072805 | 1912 | Safefree(gp); |
c43ae56f | 1913 | GvGP_set(gv, NULL); |
79072805 LW |
1914 | } |
1915 | ||
d460ef45 NIS |
1916 | int |
1917 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
1918 | { | |
53c1dcc0 AL |
1919 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1920 | PERL_UNUSED_ARG(sv); | |
dd374669 | 1921 | |
7918f24d NC |
1922 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
1923 | ||
d460ef45 NIS |
1924 | if (amtp && AMT_AMAGIC(amtp)) { |
1925 | int i; | |
1926 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 1927 | CV * const cv = amtp->table[i]; |
b37c2d43 | 1928 | if (cv) { |
ad64d0ec | 1929 | SvREFCNT_dec(MUTABLE_SV(cv)); |
601f1833 | 1930 | amtp->table[i] = NULL; |
d460ef45 NIS |
1931 | } |
1932 | } | |
1933 | } | |
1934 | return 0; | |
1935 | } | |
1936 | ||
a0d0e21e | 1937 | /* Updates and caches the CV's */ |
c3a9a790 RGS |
1938 | /* Returns: |
1939 | * 1 on success and there is some overload | |
1940 | * 0 if there is no overload | |
1941 | * -1 if some error occurred and it couldn't croak | |
1942 | */ | |
a0d0e21e | 1943 | |
c3a9a790 | 1944 | int |
242f8760 | 1945 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e | 1946 | { |
97aff369 | 1947 | dVAR; |
ad64d0ec | 1948 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 | 1949 | AMT amt; |
9b439311 | 1950 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 1951 | U32 newgen; |
a0d0e21e | 1952 | |
7918f24d NC |
1953 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
1954 | ||
9b439311 | 1955 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
1956 | if (mg) { |
1957 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
1958 | if (amtp->was_ok_am == PL_amagic_generation | |
e1a479c5 | 1959 | && amtp->was_ok_sub == newgen) { |
c3a9a790 | 1960 | return AMT_OVERLOADED(amtp) ? 1 : 0; |
14899595 | 1961 | } |
ad64d0ec | 1962 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 | 1963 | } |
a0d0e21e | 1964 | |
bfcb3514 | 1965 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 1966 | |
d460ef45 | 1967 | Zero(&amt,1,AMT); |
3280af22 | 1968 | amt.was_ok_am = PL_amagic_generation; |
e1a479c5 | 1969 | amt.was_ok_sub = newgen; |
a6006777 | 1970 | amt.fallback = AMGfallNO; |
1971 | amt.flags = 0; | |
1972 | ||
a6006777 | 1973 | { |
32251b26 IZ |
1974 | int filled = 0, have_ovl = 0; |
1975 | int i, lim = 1; | |
a6006777 | 1976 | |
22c35a8c | 1977 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 1978 | |
89ffc314 | 1979 | /* Try to find via inheritance. */ |
53c1dcc0 AL |
1980 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1981 | SV * const sv = gv ? GvSV(gv) : NULL; | |
1982 | CV* cv; | |
89ffc314 IZ |
1983 | |
1984 | if (!gv) | |
32251b26 | 1985 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 NC |
1986 | #ifdef PERL_DONT_CREATE_GVSV |
1987 | else if (!sv) { | |
6f207bd3 | 1988 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 NC |
1989 | } |
1990 | #endif | |
89ffc314 IZ |
1991 | else if (SvTRUE(sv)) |
1992 | amt.fallback=AMGfallYES; | |
1993 | else if (SvOK(sv)) | |
1994 | amt.fallback=AMGfallNEVER; | |
a6006777 | 1995 | |
32251b26 | 1996 | for (i = 1; i < lim; i++) |
601f1833 | 1997 | amt.table[i] = NULL; |
32251b26 | 1998 | for (; i < NofAMmeth; i++) { |
6136c704 | 1999 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 2000 | /* Human-readable form, for debugging: */ |
6136c704 | 2001 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
d279ab82 | 2002 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 | 2003 | |
a0288114 | 2004 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 2005 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
2006 | /* don't fill the cache while looking up! |
2007 | Creation of inheritance stubs in intermediate packages may | |
2008 | conflict with the logic of runtime method substitution. | |
2009 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
2010 | then we could have created stubs for "(+0" in A and C too. | |
2011 | But if B overloads "bool", we may want to use it for | |
2012 | numifying instead of C's "+0". */ | |
2013 | if (i >= DESTROY_amg) | |
2014 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); | |
2015 | else /* Autoload taken care of below */ | |
2016 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); | |
46fc3d4c | 2017 | cv = 0; |
89ffc314 | 2018 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 | 2019 | const char *hvname; |
44a8e56a | 2020 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 | 2021 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 IZ |
2022 | /* This is a hack to support autoloading..., while |
2023 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 2024 | /* GvSV contains the name of the method. */ |
6136c704 | 2025 | GV *ngv = NULL; |
c69033f2 | 2026 | SV *gvsv = GvSV(gv); |
a0288114 AL |
2027 | |
2028 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
2029 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
ca0270c4 | 2030 | (void*)GvSV(gv), cp, hvname) ); |
c69033f2 NC |
2031 | if (!gvsv || !SvPOK(gvsv) |
2032 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), | |
dc848c6f | 2033 | FALSE))) |
2034 | { | |
a0288114 | 2035 | /* Can be an import stub (created by "can"). */ |
242f8760 | 2036 | if (destructing) { |
c3a9a790 | 2037 | return -1; |
242f8760 RGS |
2038 | } |
2039 | else { | |
2040 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; | |
2041 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ | |
2042 | "in package \"%.256s\"", | |
2043 | (GvCVGEN(gv) ? "Stub found while resolving" | |
2044 | : "Can't resolve"), | |
2045 | name, cp, hvname); | |
2046 | } | |
44a8e56a | 2047 | } |
dc848c6f | 2048 | cv = GvCV(gv = ngv); |
44a8e56a | 2049 | } |
b464bac0 | 2050 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 2051 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 2052 | GvNAME(CvGV(cv))) ); |
2053 | filled = 1; | |
32251b26 IZ |
2054 | if (i < DESTROY_amg) |
2055 | have_ovl = 1; | |
611c1e95 | 2056 | } else if (gv) { /* Autoloaded... */ |
ea726b52 | 2057 | cv = MUTABLE_CV(gv); |
611c1e95 | 2058 | filled = 1; |
44a8e56a | 2059 | } |
ea726b52 | 2060 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); |
a0d0e21e | 2061 | } |
a0d0e21e | 2062 | if (filled) { |
a6006777 | 2063 | AMT_AMAGIC_on(&amt); |
32251b26 IZ |
2064 | if (have_ovl) |
2065 | AMT_OVERLOADED_on(&amt); | |
ad64d0ec | 2066 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2067 | (char*)&amt, sizeof(AMT)); |
32251b26 | 2068 | return have_ovl; |
a0d0e21e LW |
2069 | } |
2070 | } | |
a6006777 | 2071 | /* Here we have no table: */ |
9cbac4c7 | 2072 | /* no_table: */ |
a6006777 | 2073 | AMT_AMAGIC_off(&amt); |
ad64d0ec | 2074 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2075 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 | 2076 | return 0; |
a0d0e21e LW |
2077 | } |
2078 | ||
32251b26 IZ |
2079 | |
2080 | CV* | |
2081 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
2082 | { | |
97aff369 | 2083 | dVAR; |
3f8f4626 | 2084 | MAGIC *mg; |
32251b26 | 2085 | AMT *amtp; |
e1a479c5 | 2086 | U32 newgen; |
9b439311 | 2087 | struct mro_meta* stash_meta; |
32251b26 | 2088 | |
bfcb3514 | 2089 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 2090 | return NULL; |
e1a479c5 | 2091 | |
9b439311 BB |
2092 | stash_meta = HvMROMETA(stash); |
2093 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 2094 | |
ad64d0ec | 2095 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
2096 | if (!mg) { |
2097 | do_update: | |
242f8760 RGS |
2098 | /* If we're looking up a destructor to invoke, we must avoid |
2099 | * that Gv_AMupdate croaks, because we might be dying already */ | |
2dcac756 | 2100 | if (Gv_AMupdate(stash, cBOOL(id == DESTROY_amg)) == -1) { |
242f8760 RGS |
2101 | /* and if it didn't found a destructor, we fall back |
2102 | * to a simpler method that will only look for the | |
2103 | * destructor instead of the whole magic */ | |
2104 | if (id == DESTROY_amg) { | |
2105 | GV * const gv = gv_fetchmethod(stash, "DESTROY"); | |
2106 | if (gv) | |
2107 | return GvCV(gv); | |
2108 | } | |
2109 | return NULL; | |
2110 | } | |
ad64d0ec | 2111 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 | 2112 | } |
a9fd4e40 | 2113 | assert(mg); |
32251b26 IZ |
2114 | amtp = (AMT*)mg->mg_ptr; |
2115 | if ( amtp->was_ok_am != PL_amagic_generation | |
e1a479c5 | 2116 | || amtp->was_ok_sub != newgen ) |
32251b26 | 2117 | goto do_update; |
3ad83ce7 | 2118 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 2119 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
2120 | if (ret && isGV(ret)) { /* Autoloading stab */ |
2121 | /* Passing it through may have resulted in a warning | |
2122 | "Inherited AUTOLOAD for a non-method deprecated", since | |
2123 | our caller is going through a function call, not a method call. | |
2124 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 2125 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
2126 | |
2127 | if (gv && GvCV(gv)) | |
2128 | return GvCV(gv); | |
2129 | } | |
2130 | return ret; | |
2131 | } | |
a0288114 | 2132 | |
601f1833 | 2133 | return NULL; |
32251b26 IZ |
2134 | } |
2135 | ||
2136 | ||
6f1401dc DM |
2137 | /* Implement tryAMAGICun_MG macro. |
2138 | Do get magic, then see if the stack arg is overloaded and if so call it. | |
2139 | Flags: | |
2140 | AMGf_set return the arg using SETs rather than assigning to | |
2141 | the targ | |
2142 | AMGf_numeric apply sv_2num to the stack arg. | |
2143 | */ | |
2144 | ||
2145 | bool | |
2146 | Perl_try_amagic_un(pTHX_ int method, int flags) { | |
2147 | dVAR; | |
2148 | dSP; | |
2149 | SV* tmpsv; | |
2150 | SV* const arg = TOPs; | |
2151 | ||
2152 | SvGETMAGIC(arg); | |
2153 | ||
9f8bf298 NC |
2154 | if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method, |
2155 | AMGf_noright | AMGf_unary))) { | |
6f1401dc DM |
2156 | if (flags & AMGf_set) { |
2157 | SETs(tmpsv); | |
2158 | } | |
2159 | else { | |
2160 | dTARGET; | |
2161 | if (SvPADMY(TARG)) { | |
2162 | sv_setsv(TARG, tmpsv); | |
2163 | SETTARG; | |
2164 | } | |
2165 | else | |
2166 | SETs(tmpsv); | |
2167 | } | |
2168 | PUTBACK; | |
2169 | return TRUE; | |
2170 | } | |
2171 | ||
2172 | if ((flags & AMGf_numeric) && SvROK(arg)) | |
2173 | *sp = sv_2num(arg); | |
2174 | return FALSE; | |
2175 | } | |
2176 | ||
2177 | ||
2178 | /* Implement tryAMAGICbin_MG macro. | |
2179 | Do get magic, then see if the two stack args are overloaded and if so | |
2180 | call it. | |
2181 | Flags: | |
2182 | AMGf_set return the arg using SETs rather than assigning to | |
2183 | the targ | |
2184 | AMGf_assign op may be called as mutator (eg +=) | |
2185 | AMGf_numeric apply sv_2num to the stack arg. | |
2186 | */ | |
2187 | ||
2188 | bool | |
2189 | Perl_try_amagic_bin(pTHX_ int method, int flags) { | |
2190 | dVAR; | |
2191 | dSP; | |
2192 | SV* const left = TOPm1s; | |
2193 | SV* const right = TOPs; | |
2194 | ||
2195 | SvGETMAGIC(left); | |
2196 | if (left != right) | |
2197 | SvGETMAGIC(right); | |
2198 | ||
2199 | if (SvAMAGIC(left) || SvAMAGIC(right)) { | |
2200 | SV * const tmpsv = amagic_call(left, right, method, | |
2201 | ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0)); | |
2202 | if (tmpsv) { | |
2203 | if (flags & AMGf_set) { | |
2204 | (void)POPs; | |
2205 | SETs(tmpsv); | |
2206 | } | |
2207 | else { | |
2208 | dATARGET; | |
2209 | (void)POPs; | |
2210 | if (opASSIGN || SvPADMY(TARG)) { | |
2211 | sv_setsv(TARG, tmpsv); | |
2212 | SETTARG; | |
2213 | } | |
2214 | else | |
2215 | SETs(tmpsv); | |
2216 | } | |
2217 | PUTBACK; | |
2218 | return TRUE; | |
2219 | } | |
2220 | } | |
75ea7a12 FC |
2221 | if(left==right && SvGMAGICAL(left)) { |
2222 | SV * const left = sv_newmortal(); | |
2223 | *(sp-1) = left; | |
2224 | /* Print the uninitialized warning now, so it includes the vari- | |
2225 | able name. */ | |
2226 | if (!SvOK(right)) { | |
2227 | if (ckWARN(WARN_UNINITIALIZED)) report_uninit(right); | |
2228 | sv_setsv_flags(left, &PL_sv_no, 0); | |
2229 | } | |
2230 | else sv_setsv_flags(left, right, 0); | |
2231 | SvGETMAGIC(right); | |
2232 | } | |
6f1401dc | 2233 | if (flags & AMGf_numeric) { |
75ea7a12 FC |
2234 | if (SvROK(TOPm1s)) |
2235 | *(sp-1) = sv_2num(TOPm1s); | |
6f1401dc DM |
2236 | if (SvROK(right)) |
2237 | *sp = sv_2num(right); | |
2238 | } | |
2239 | return FALSE; | |
2240 | } | |
2241 | ||
25a9ffce NC |
2242 | SV * |
2243 | Perl_amagic_deref_call(pTHX_ SV *ref, int method) { | |
2244 | SV *tmpsv = NULL; | |
2245 | ||
2246 | PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL; | |
2247 | ||
2248 | while (SvAMAGIC(ref) && | |
2249 | (tmpsv = amagic_call(ref, &PL_sv_undef, method, | |
2250 | AMGf_noright | AMGf_unary))) { | |
2251 | if (!SvROK(tmpsv)) | |
2252 | Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); | |
2253 | if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) { | |
2254 | /* Bail out if it returns us the same reference. */ | |
2255 | return tmpsv; | |
2256 | } | |
2257 | ref = tmpsv; | |
2258 | } | |
2259 | return tmpsv ? tmpsv : ref; | |
2260 | } | |
6f1401dc | 2261 | |
a0d0e21e | 2262 | SV* |
864dbfa3 | 2263 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 2264 | { |
27da23d5 | 2265 | dVAR; |
b267980d | 2266 | MAGIC *mg; |
9c5ffd7c | 2267 | CV *cv=NULL; |
a0d0e21e | 2268 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 2269 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
2270 | int off = 0, off1, lr = 0, notfound = 0; |
2271 | int postpr = 0, force_cpy = 0; | |
2272 | int assign = AMGf_assign & flags; | |
2273 | const int assignshift = assign ? 1 : 0; | |
bf5522a1 | 2274 | int use_default_op = 0; |
497b47a8 JH |
2275 | #ifdef DEBUGGING |
2276 | int fl=0; | |
497b47a8 | 2277 | #endif |
25716404 | 2278 | HV* stash=NULL; |
7918f24d NC |
2279 | |
2280 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
2281 | ||
e46c382e | 2282 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
20439bc7 | 2283 | SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0); |
e46c382e YK |
2284 | |
2285 | if ( !lex_mask || !SvOK(lex_mask) ) | |
2286 | /* overloading lexically disabled */ | |
2287 | return NULL; | |
2288 | else if ( lex_mask && SvPOK(lex_mask) ) { | |
2289 | /* we have an entry in the hints hash, check if method has been | |
2290 | * masked by overloading.pm */ | |
d15cd831 | 2291 | STRLEN len; |
e46c382e | 2292 | const int offset = method / 8; |
d87d3eed | 2293 | const int bit = method % 8; |
e46c382e YK |
2294 | char *pv = SvPV(lex_mask, len); |
2295 | ||
d15cd831 | 2296 | /* Bit set, so this overloading operator is disabled */ |
ed15e576 | 2297 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) |
e46c382e YK |
2298 | return NULL; |
2299 | } | |
2300 | } | |
2301 | ||
a0d0e21e | 2302 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 | 2303 | && (stash = SvSTASH(SvRV(left))) |
ad64d0ec | 2304 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 2305 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 2306 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 2307 | : NULL)) |
b267980d | 2308 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
2309 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
2310 | * usual method */ | |
497b47a8 JH |
2311 | ( |
2312 | #ifdef DEBUGGING | |
2313 | fl = 1, | |
a0288114 | 2314 | #endif |
497b47a8 | 2315 | cv = cvp[off=method])))) { |
a0d0e21e LW |
2316 | lr = -1; /* Call method for left argument */ |
2317 | } else { | |
2318 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
2319 | int logic; | |
2320 | ||
2321 | /* look for substituted methods */ | |
ee239bfe | 2322 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
2323 | switch (method) { |
2324 | case inc_amg: | |
ee239bfe IZ |
2325 | force_cpy = 1; |
2326 | if ((cv = cvp[off=add_ass_amg]) | |
2327 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 2328 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
2329 | } |
2330 | break; | |
2331 | case dec_amg: | |
ee239bfe IZ |
2332 | force_cpy = 1; |
2333 | if ((cv = cvp[off = subtr_ass_amg]) | |
2334 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 2335 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
2336 | } |
2337 | break; | |
2338 | case bool__amg: | |
2339 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
2340 | break; | |
2341 | case numer_amg: | |
2342 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
2343 | break; | |
2344 | case string_amg: | |
2345 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
2346 | break; | |
b7787f18 AL |
2347 | case not_amg: |
2348 | (void)((cv = cvp[off=bool__amg]) | |
2349 | || (cv = cvp[off=numer_amg]) | |
2350 | || (cv = cvp[off=string_amg])); | |
2ab54efd MB |
2351 | if (cv) |
2352 | postpr = 1; | |
b7787f18 | 2353 | break; |
748a9306 LW |
2354 | case copy_amg: |
2355 | { | |
76e3520e GS |
2356 | /* |
2357 | * SV* ref causes confusion with the interpreter variable of | |
2358 | * the same name | |
2359 | */ | |
890ce7af | 2360 | SV* const tmpRef=SvRV(left); |
76e3520e | 2361 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 2362 | /* |
2363 | * Just to be extra cautious. Maybe in some | |
2364 | * additional cases sv_setsv is safe, too. | |
2365 | */ | |
890ce7af | 2366 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 2367 | SvOBJECT_on(newref); |
96d4b0ee NC |
2368 | /* As a bit of a source compatibility hack, SvAMAGIC() and |
2369 | friends dereference an RV, to behave the same was as when | |
2370 | overloading was stored on the reference, not the referant. | |
2371 | Hence we can't use SvAMAGIC_on() | |
2372 | */ | |
2373 | SvFLAGS(newref) |= SVf_AMAGIC; | |
85fbaab2 | 2374 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); |
748a9306 LW |
2375 | return newref; |
2376 | } | |
2377 | } | |
2378 | break; | |
a0d0e21e | 2379 | case abs_amg: |
b267980d | 2380 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 2381 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 2382 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 2383 | if (off1==lt_amg) { |
890ce7af | 2384 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
2385 | lt_amg,AMGf_noright); |
2386 | logic = SvTRUE(lessp); | |
2387 | } else { | |
890ce7af | 2388 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
2389 | ncmp_amg,AMGf_noright); |
2390 | logic = (SvNV(lessp) < 0); | |
2391 | } | |
2392 | if (logic) { | |
2393 | if (off==subtr_amg) { | |
2394 | right = left; | |
748a9306 | 2395 | left = nullsv; |
a0d0e21e LW |
2396 | lr = 1; |
2397 | } | |
2398 | } else { | |
2399 | return left; | |
2400 | } | |
2401 | } | |
2402 | break; | |
2403 | case neg_amg: | |
155aba94 | 2404 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
2405 | right = left; |
2406 | left = sv_2mortal(newSViv(0)); | |
2407 | lr = 1; | |
2408 | } | |
2409 | break; | |
f216259d | 2410 | case int_amg: |
f5284f61 | 2411 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
c4c7412c | 2412 | case ftest_amg: /* XXXX Eventually should do to_gv. */ |
d4b87e75 | 2413 | case regexp_amg: |
b267980d NIS |
2414 | /* FAIL safe */ |
2415 | return NULL; /* Delegate operation to standard mechanisms. */ | |
2416 | break; | |
f5284f61 IZ |
2417 | case to_sv_amg: |
2418 | case to_av_amg: | |
2419 | case to_hv_amg: | |
2420 | case to_gv_amg: | |
2421 | case to_cv_amg: | |
2422 | /* FAIL safe */ | |
b267980d | 2423 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 | 2424 | break; |
a0d0e21e LW |
2425 | default: |
2426 | goto not_found; | |
2427 | } | |
2428 | if (!cv) goto not_found; | |
2429 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
25716404 | 2430 | && (stash = SvSTASH(SvRV(right))) |
ad64d0ec | 2431 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 2432 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 2433 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 2434 | : NULL)) |
a0d0e21e LW |
2435 | && (cv = cvp[off=method])) { /* Method for right |
2436 | * argument found */ | |
2437 | lr=1; | |
bf5522a1 MB |
2438 | } else if (((cvp && amtp->fallback > AMGfallNEVER) |
2439 | || (ocvp && oamtp->fallback > AMGfallNEVER)) | |
a0d0e21e LW |
2440 | && !(flags & AMGf_unary)) { |
2441 | /* We look for substitution for | |
2442 | * comparison operations and | |
fc36a67e | 2443 | * concatenation */ |
a0d0e21e LW |
2444 | if (method==concat_amg || method==concat_ass_amg |
2445 | || method==repeat_amg || method==repeat_ass_amg) { | |
2446 | return NULL; /* Delegate operation to string conversion */ | |
2447 | } | |
2448 | off = -1; | |
2449 | switch (method) { | |
2450 | case lt_amg: | |
2451 | case le_amg: | |
2452 | case gt_amg: | |
2453 | case ge_amg: | |
2454 | case eq_amg: | |
2455 | case ne_amg: | |
2ab54efd MB |
2456 | off = ncmp_amg; |
2457 | break; | |
a0d0e21e LW |
2458 | case slt_amg: |
2459 | case sle_amg: | |
2460 | case sgt_amg: | |
2461 | case sge_amg: | |
2462 | case seq_amg: | |
2463 | case sne_amg: | |
2ab54efd MB |
2464 | off = scmp_amg; |
2465 | break; | |
a0d0e21e | 2466 | } |
bf5522a1 MB |
2467 | if (off != -1) { |
2468 | if (ocvp && (oamtp->fallback > AMGfallNEVER)) { | |
2469 | cv = ocvp[off]; | |
2470 | lr = -1; | |
2471 | } | |
2472 | if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) { | |
2473 | cv = cvp[off]; | |
2474 | lr = 1; | |
2475 | } | |
2476 | } | |
2477 | if (cv) | |
2ab54efd MB |
2478 | postpr = 1; |
2479 | else | |
2480 | goto not_found; | |
a0d0e21e | 2481 | } else { |
a6006777 | 2482 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
2483 | switch (method) { |
2484 | case to_sv_amg: | |
2485 | case to_av_amg: | |
2486 | case to_hv_amg: | |
2487 | case to_gv_amg: | |
2488 | case to_cv_amg: | |
2489 | /* FAIL safe */ | |
2490 | return left; /* Delegate operation to standard mechanisms. */ | |
2491 | break; | |
2492 | } | |
a0d0e21e LW |
2493 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
2494 | notfound = 1; lr = -1; | |
2495 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
2496 | notfound = 1; lr = 1; | |
bf5522a1 MB |
2497 | } else if ((use_default_op = |
2498 | (!ocvp || oamtp->fallback >= AMGfallYES) | |
2499 | && (!cvp || amtp->fallback >= AMGfallYES)) | |
2500 | && !DEBUG_o_TEST) { | |
4cc0ca18 NC |
2501 | /* Skip generating the "no method found" message. */ |
2502 | return NULL; | |
a0d0e21e | 2503 | } else { |
46fc3d4c | 2504 | SV *msg; |
774d564b | 2505 | if (off==-1) off=method; |
b267980d | 2506 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 | 2507 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 | 2508 | AMG_id2name(method + assignshift), |
e7ea3e70 | 2509 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d | 2510 | SvAMAGIC(left)? |
a0d0e21e LW |
2511 | "in overloaded package ": |
2512 | "has no overloaded magic", | |
b267980d | 2513 | SvAMAGIC(left)? |
bfcb3514 | 2514 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e | 2515 | "", |
b267980d | 2516 | SvAMAGIC(right)? |
e7ea3e70 | 2517 | ",\n\tright argument in overloaded package ": |
b267980d | 2518 | (flags & AMGf_unary |
e7ea3e70 IZ |
2519 | ? "" |
2520 | : ",\n\tright argument has no overloaded magic"), | |
b267980d | 2521 | SvAMAGIC(right)? |
bfcb3514 | 2522 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c | 2523 | "")); |
bf5522a1 | 2524 | if (use_default_op) { |
b15aece3 | 2525 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e | 2526 | } else { |
be2597df | 2527 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e LW |
2528 | } |
2529 | return NULL; | |
2530 | } | |
ee239bfe | 2531 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
2532 | } |
2533 | } | |
497b47a8 | 2534 | #ifdef DEBUGGING |
a0d0e21e | 2535 | if (!notfound) { |
497b47a8 | 2536 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 | 2537 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 JH |
2538 | AMG_id2name(off), |
2539 | method+assignshift==off? "" : | |
a0288114 | 2540 | " (initially \"", |
497b47a8 JH |
2541 | method+assignshift==off? "" : |
2542 | AMG_id2name(method+assignshift), | |
a0288114 | 2543 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
2544 | flags & AMGf_unary? "" : |
2545 | lr==1 ? " for right argument": " for left argument", | |
2546 | flags & AMGf_unary? " for argument" : "", | |
bfcb3514 | 2547 | stash ? HvNAME_get(stash) : "null", |
497b47a8 | 2548 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 2549 | } |
497b47a8 | 2550 | #endif |
748a9306 LW |
2551 | /* Since we use shallow copy during assignment, we need |
2552 | * to dublicate the contents, probably calling user-supplied | |
2553 | * version of copy operator | |
2554 | */ | |
ee239bfe IZ |
2555 | /* We need to copy in following cases: |
2556 | * a) Assignment form was called. | |
2557 | * assignshift==1, assign==T, method + 1 == off | |
2558 | * b) Increment or decrement, called directly. | |
2559 | * assignshift==0, assign==0, method + 0 == off | |
2560 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 2561 | * assignshift==0, assign==T, |
ee239bfe IZ |
2562 | * force_cpy == T |
2563 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 2564 | * assignshift==0, assign==0, |
ee239bfe IZ |
2565 | * force_cpy == T |
2566 | * e) Assignment form translated to nomethod. | |
2567 | * assignshift==1, assign==T, method + 1 != off | |
2568 | * force_cpy == T | |
2569 | */ | |
2570 | /* off is method, method+assignshift, or a result of opcode substitution. | |
2571 | * In the latter case assignshift==0, so only notfound case is important. | |
2572 | */ | |
2573 | if (( (method + assignshift == off) | |
2574 | && (assign || (method == inc_amg) || (method == dec_amg))) | |
2575 | || force_cpy) | |
6f1401dc | 2576 | { |
1b38c28e NC |
2577 | /* newSVsv does not behave as advertised, so we copy missing |
2578 | * information by hand */ | |
2579 | SV *tmpRef = SvRV(left); | |
2580 | SV *rv_copy; | |
31d632c3 | 2581 | if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) { |
1b38c28e NC |
2582 | SvRV_set(left, rv_copy); |
2583 | SvSETMAGIC(left); | |
2584 | SvREFCNT_dec(tmpRef); | |
2585 | } | |
6f1401dc DM |
2586 | } |
2587 | ||
a0d0e21e LW |
2588 | { |
2589 | dSP; | |
2590 | BINOP myop; | |
2591 | SV* res; | |
b7787f18 | 2592 | const bool oldcatch = CATCH_GET; |
a0d0e21e | 2593 | |
54310121 | 2594 | CATCH_SET(TRUE); |
a0d0e21e LW |
2595 | Zero(&myop, 1, BINOP); |
2596 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 2597 | myop.op_next = NULL; |
54310121 | 2598 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e | 2599 | |
e788e7d3 | 2600 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 2601 | ENTER; |
462e5cf6 | 2602 | SAVEOP(); |
533c011a | 2603 | PL_op = (OP *) &myop; |
3280af22 | 2604 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 2605 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 2606 | PUTBACK; |
897d3989 | 2607 | Perl_pp_pushmark(aTHX); |
a0d0e21e | 2608 | |
924508f0 | 2609 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
2610 | PUSHs(lr>0? right: left); |
2611 | PUSHs(lr>0? left: right); | |
3280af22 | 2612 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 2613 | if (notfound) { |
59cd0e26 NC |
2614 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
2615 | AMG_id2namelen(method + assignshift), SVs_TEMP)); | |
a0d0e21e | 2616 | } |
ad64d0ec | 2617 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e LW |
2618 | PUTBACK; |
2619 | ||
139d0ce6 | 2620 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 | 2621 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
2622 | LEAVE; |
2623 | SPAGAIN; | |
2624 | ||
2625 | res=POPs; | |
ebafeae7 | 2626 | PUTBACK; |
d3acc0f7 | 2627 | POPSTACK; |
54310121 | 2628 | CATCH_SET(oldcatch); |
a0d0e21e | 2629 | |
a0d0e21e | 2630 | if (postpr) { |
b7787f18 | 2631 | int ans; |
a0d0e21e LW |
2632 | switch (method) { |
2633 | case le_amg: | |
2634 | case sle_amg: | |
2635 | ans=SvIV(res)<=0; break; | |
2636 | case lt_amg: | |
2637 | case slt_amg: | |
2638 | ans=SvIV(res)<0; break; | |
2639 | case ge_amg: | |
2640 | case sge_amg: | |
2641 | ans=SvIV(res)>=0; break; | |
2642 | case gt_amg: | |
2643 | case sgt_amg: | |
2644 | ans=SvIV(res)>0; break; | |
2645 | case eq_amg: | |
2646 | case seq_amg: | |
2647 | ans=SvIV(res)==0; break; | |
2648 | case ne_amg: | |
2649 | case sne_amg: | |
2650 | ans=SvIV(res)!=0; break; | |
2651 | case inc_amg: | |
2652 | case dec_amg: | |
bbce6d69 | 2653 | SvSetSV(left,res); return left; |
dc437b57 | 2654 | case not_amg: |
fe7ac86a | 2655 | ans=!SvTRUE(res); break; |
b7787f18 AL |
2656 | default: |
2657 | ans=0; break; | |
a0d0e21e | 2658 | } |
54310121 | 2659 | return boolSV(ans); |
748a9306 LW |
2660 | } else if (method==copy_amg) { |
2661 | if (!SvROK(res)) { | |
cea2e8a9 | 2662 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
2663 | } |
2664 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
2665 | } else { |
2666 | return res; | |
2667 | } | |
2668 | } | |
2669 | } | |
c9d5ac95 | 2670 | |
f5c1e807 NC |
2671 | void |
2672 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
2673 | { | |
2674 | dVAR; | |
acda4c6a | 2675 | U32 hash; |
f5c1e807 | 2676 | |
7918f24d | 2677 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 NC |
2678 | PERL_UNUSED_ARG(flags); |
2679 | ||
acda4c6a NC |
2680 | if (len > I32_MAX) |
2681 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); | |
2682 | ||
ae8cc45f NC |
2683 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2684 | unshare_hek(GvNAME_HEK(gv)); | |
2685 | } | |
2686 | ||
acda4c6a | 2687 | PERL_HASH(hash, name, len); |
9f616d01 | 2688 | GvNAME_HEK(gv) = share_hek(name, len, hash); |
f5c1e807 NC |
2689 | } |
2690 | ||
66610fdd | 2691 | /* |
f7461760 Z |
2692 | =for apidoc gv_try_downgrade |
2693 | ||
2867cdbc Z |
2694 | If the typeglob C<gv> can be expressed more succinctly, by having |
2695 | something other than a real GV in its place in the stash, replace it | |
2696 | with the optimised form. Basic requirements for this are that C<gv> | |
2697 | is a real typeglob, is sufficiently ordinary, and is only referenced | |
2698 | from its package. This function is meant to be used when a GV has been | |
2699 | looked up in part to see what was there, causing upgrading, but based | |
2700 | on what was found it turns out that the real GV isn't required after all. | |
2701 | ||
2702 | If C<gv> is a completely empty typeglob, it is deleted from the stash. | |
2703 | ||
2704 | If C<gv> is a typeglob containing only a sufficiently-ordinary constant | |
2705 | sub, the typeglob is replaced with a scalar-reference placeholder that | |
2706 | more compactly represents the same thing. | |
f7461760 Z |
2707 | |
2708 | =cut | |
2709 | */ | |
2710 | ||
2711 | void | |
2712 | Perl_gv_try_downgrade(pTHX_ GV *gv) | |
2713 | { | |
2714 | HV *stash; | |
2715 | CV *cv; | |
2716 | HEK *namehek; | |
2717 | SV **gvp; | |
2718 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; | |
95f56751 FC |
2719 | |
2720 | /* XXX Why and where does this leave dangling pointers during global | |
2721 | destruction? */ | |
627364f1 | 2722 | if (PL_phase == PERL_PHASE_DESTRUCT) return; |
95f56751 | 2723 | |
2867cdbc | 2724 | if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
803f2748 | 2725 | !SvOBJECT(gv) && !SvREADONLY(gv) && |
f7461760 | 2726 | isGV_with_GP(gv) && GvGP(gv) && |
2867cdbc | 2727 | !GvINTRO(gv) && GvREFCNT(gv) == 1 && |
f7461760 | 2728 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && |
099be4f1 | 2729 | GvEGVx(gv) == gv && (stash = GvSTASH(gv)))) |
2867cdbc | 2730 | return; |
803f2748 DM |
2731 | if (SvMAGICAL(gv)) { |
2732 | MAGIC *mg; | |
2733 | /* only backref magic is allowed */ | |
2734 | if (SvGMAGICAL(gv) || SvSMAGICAL(gv)) | |
2735 | return; | |
2736 | for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) { | |
2737 | if (mg->mg_type != PERL_MAGIC_backref) | |
2738 | return; | |
2739 | } | |
2740 | } | |
2867cdbc Z |
2741 | cv = GvCV(gv); |
2742 | if (!cv) { | |
2743 | HEK *gvnhek = GvNAME_HEK(gv); | |
2744 | (void)hv_delete(stash, HEK_KEY(gvnhek), | |
2745 | HEK_UTF8(gvnhek) ? -HEK_LEN(gvnhek) : HEK_LEN(gvnhek), G_DISCARD); | |
2746 | } else if (GvMULTI(gv) && cv && | |
f7461760 Z |
2747 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
2748 | CvSTASH(cv) == stash && CvGV(cv) == gv && | |
2749 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && | |
2750 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && | |
2751 | (namehek = GvNAME_HEK(gv)) && | |
2752 | (gvp = hv_fetch(stash, HEK_KEY(namehek), | |
2753 | HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) && | |
2754 | *gvp == (SV*)gv) { | |
2755 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); | |
2756 | SvREFCNT(gv) = 0; | |
2757 | sv_clear((SV*)gv); | |
2758 | SvREFCNT(gv) = 1; | |
2759 | SvFLAGS(gv) = SVt_IV|SVf_ROK; | |
2760 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - | |
2761 | STRUCT_OFFSET(XPVIV, xiv_iv)); | |
2762 | SvRV_set(gv, value); | |
2763 | } | |
2764 | } | |
2765 | ||
4aaa4757 FC |
2766 | #include "XSUB.h" |
2767 | ||
2768 | static void | |
2769 | core_xsub(pTHX_ CV* cv) | |
2770 | { | |
2771 | Perl_croak(aTHX_ | |
2772 | "&CORE::%s cannot be called directly", GvNAME(CvGV(cv)) | |
2773 | ); | |
2774 | } | |
2775 | ||
f7461760 | 2776 | /* |
66610fdd RGS |
2777 | * Local variables: |
2778 | * c-indentation-style: bsd | |
2779 | * c-basic-offset: 4 | |
2780 | * indent-tabs-mode: t | |
2781 | * End: | |
2782 | * | |
37442d52 RGS |
2783 | * ex: set ts=8 sts=4 sw=4 noet: |
2784 | */ |