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 |
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 |
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 |
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 | * |
19 | * [p.599 of _The Lord of the Rings_, III/xi: "The PalantÃr"] |
79072805 |
20 | */ |
21 | |
ccfc67b7 |
22 | /* |
23 | =head1 GV Functions |
166f8a29 |
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 |
33 | */ |
34 | |
79072805 |
35 | #include "EXTERN.h" |
864dbfa3 |
36 | #define PERL_IN_GV_C |
79072805 |
37 | #include "perl.h" |
8261f8eb |
38 | #include "overload.c" |
79072805 |
39 | |
f54cb97a |
40 | static const char S_autoload[] = "AUTOLOAD"; |
41 | static const STRLEN S_autolen = sizeof(S_autoload)-1; |
5c7983e5 |
42 | |
c69033f2 |
43 | GV * |
d5713896 |
44 | Perl_gv_add_by_type(pTHX_ GV *gv, svtype type) |
c69033f2 |
45 | { |
d5713896 |
46 | SV **where; |
7918f24d |
47 | |
bb85b28a |
48 | if (!gv || SvTYPE((const SV *)gv) != SVt_PVGV) { |
49 | const char *what; |
50 | if (type == SVt_PVIO) { |
51 | /* |
52 | * if it walks like a dirhandle, then let's assume that |
53 | * this is a dirhandle. |
54 | */ |
55 | what = PL_op->op_type == OP_READDIR || |
56 | PL_op->op_type == OP_TELLDIR || |
57 | PL_op->op_type == OP_SEEKDIR || |
58 | PL_op->op_type == OP_REWINDDIR || |
59 | PL_op->op_type == OP_CLOSEDIR ? |
60 | "dirhandle" : "filehandle"; |
61 | /* diag_listed_as: Bad symbol for filehandle */ |
62 | } else if (type == SVt_PVHV) { |
63 | what = "hash"; |
64 | } else { |
65 | what = type == SVt_PVAV ? "array" : "scalar"; |
66 | } |
67 | Perl_croak(aTHX_ "Bad symbol for %s", what); |
68 | } |
d5713896 |
69 | |
70 | if (type == SVt_PVHV) { |
71 | where = (SV **)&GvHV(gv); |
72 | } else if (type == SVt_PVAV) { |
73 | where = (SV **)&GvAV(gv); |
bb85b28a |
74 | } else if (type == SVt_PVIO) { |
75 | where = (SV **)&GvIOp(gv); |
d5713896 |
76 | } else { |
77 | where = &GvSV(gv); |
78 | } |
7918f24d |
79 | |
d5713896 |
80 | if (!*where) |
81 | *where = newSV_type(type); |
79072805 |
82 | return gv; |
83 | } |
84 | |
85 | GV * |
864dbfa3 |
86 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
87 | { |
7918f24d |
88 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec |
89 | return gv_fetchfile_flags(name, strlen(name), 0); |
90 | } |
91 | |
92 | GV * |
93 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, |
94 | const U32 flags) |
95 | { |
97aff369 |
96 | dVAR; |
4116122e |
97 | char smallbuf[128]; |
53d95988 |
98 | char *tmpbuf; |
d9095cec |
99 | const STRLEN tmplen = namelen + 2; |
79072805 |
100 | GV *gv; |
101 | |
7918f24d |
102 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec |
103 | PERL_UNUSED_ARG(flags); |
104 | |
1d7c1841 |
105 | if (!PL_defstash) |
a0714e2c |
106 | return NULL; |
1d7c1841 |
107 | |
d9095cec |
108 | if (tmplen <= sizeof smallbuf) |
53d95988 |
109 | tmpbuf = smallbuf; |
110 | else |
798b63bc |
111 | Newx(tmpbuf, tmplen, char); |
0ac0412a |
112 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 |
113 | tmpbuf[0] = '_'; |
114 | tmpbuf[1] = '<'; |
d9095cec |
115 | memcpy(tmpbuf + 2, name, namelen); |
116 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
117 | if (!isGV(gv)) { |
d9095cec |
118 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 |
119 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec |
120 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 |
121 | #else |
d9095cec |
122 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 |
123 | #endif |
65269a95 |
124 | if (PERLDB_LINE || PERLDB_SAVESRC) |
a0714e2c |
125 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); |
1d7c1841 |
126 | } |
53d95988 |
127 | if (tmpbuf != smallbuf) |
128 | Safefree(tmpbuf); |
79072805 |
129 | return gv; |
130 | } |
131 | |
62d55b22 |
132 | /* |
133 | =for apidoc gv_const_sv |
134 | |
135 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for |
136 | inlining, or C<gv> is a placeholder reference that would be promoted to such |
137 | a typeglob, then returns the value returned by the sub. Otherwise, returns |
138 | NULL. |
139 | |
140 | =cut |
141 | */ |
142 | |
143 | SV * |
144 | Perl_gv_const_sv(pTHX_ GV *gv) |
145 | { |
7918f24d |
146 | PERL_ARGS_ASSERT_GV_CONST_SV; |
147 | |
62d55b22 |
148 | if (SvTYPE(gv) == SVt_PVGV) |
149 | return cv_const_sv(GvCVu(gv)); |
150 | return SvROK(gv) ? SvRV(gv) : NULL; |
151 | } |
152 | |
12816592 |
153 | GP * |
154 | Perl_newGP(pTHX_ GV *const gv) |
155 | { |
156 | GP *gp; |
19bad673 |
157 | U32 hash; |
158 | #ifdef USE_ITHREADS |
1df5f7c1 |
159 | const char *const file |
160 | = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : ""; |
19bad673 |
161 | const STRLEN len = strlen(file); |
162 | #else |
163 | SV *const temp_sv = CopFILESV(PL_curcop); |
164 | const char *file; |
165 | STRLEN len; |
166 | |
7918f24d |
167 | PERL_ARGS_ASSERT_NEWGP; |
168 | |
19bad673 |
169 | if (temp_sv) { |
170 | file = SvPVX(temp_sv); |
171 | len = SvCUR(temp_sv); |
172 | } else { |
173 | file = ""; |
174 | len = 0; |
175 | } |
176 | #endif |
f4890806 |
177 | |
178 | PERL_HASH(hash, file, len); |
179 | |
12816592 |
180 | Newxz(gp, 1, GP); |
181 | |
182 | #ifndef PERL_DONT_CREATE_GVSV |
b5c2dcb8 |
183 | gp->gp_sv = newSV(0); |
12816592 |
184 | #endif |
185 | |
1df5f7c1 |
186 | gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0; |
12816592 |
187 | /* XXX Ideally this cast would be replaced with a change to const char* |
188 | in the struct. */ |
f4890806 |
189 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 |
190 | gp->gp_egv = gv; |
191 | gp->gp_refcnt = 1; |
192 | |
193 | return gp; |
194 | } |
195 | |
463ee0b2 |
196 | void |
864dbfa3 |
197 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
198 | { |
27da23d5 |
199 | dVAR; |
3b6733bf |
200 | const U32 old_type = SvTYPE(gv); |
201 | const bool doproto = old_type > SVt_NULL; |
024963f8 |
202 | char * const proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
49a54bbe |
203 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
756cb477 |
204 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 |
205 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 |
206 | |
7918f24d |
207 | PERL_ARGS_ASSERT_GV_INIT; |
756cb477 |
208 | assert (!(proto && has_constant)); |
209 | |
210 | if (has_constant) { |
5c1f4d79 |
211 | /* The constant has to be a simple scalar type. */ |
212 | switch (SvTYPE(has_constant)) { |
213 | case SVt_PVAV: |
214 | case SVt_PVHV: |
215 | case SVt_PVCV: |
216 | case SVt_PVFM: |
217 | case SVt_PVIO: |
218 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", |
219 | sv_reftype(has_constant, 0)); |
42d0e0b7 |
220 | default: NOOP; |
5c1f4d79 |
221 | } |
756cb477 |
222 | SvRV_set(gv, NULL); |
223 | SvROK_off(gv); |
224 | } |
463ee0b2 |
225 | |
3b6733bf |
226 | |
227 | if (old_type < SVt_PVGV) { |
228 | if (old_type >= SVt_PV) |
229 | SvCUR_set(gv, 0); |
ad64d0ec |
230 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); |
3b6733bf |
231 | } |
55d729e4 |
232 | if (SvLEN(gv)) { |
233 | if (proto) { |
f880fe2f |
234 | SvPV_set(gv, NULL); |
b162af07 |
235 | SvLEN_set(gv, 0); |
55d729e4 |
236 | SvPOK_off(gv); |
237 | } else |
94010e71 |
238 | Safefree(SvPVX_mutable(gv)); |
55d729e4 |
239 | } |
2e5b91de |
240 | SvIOK_off(gv); |
241 | isGV_with_GP_on(gv); |
12816592 |
242 | |
243 | GvGP(gv) = Perl_newGP(aTHX_ gv); |
e15faf7d |
244 | GvSTASH(gv) = stash; |
245 | if (stash) |
ad64d0ec |
246 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
ae8cc45f |
247 | gv_name_set(gv, name, len, GV_ADD); |
23ad5bf5 |
248 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
249 | GvMULTI_on(gv); |
55d729e4 |
250 | if (doproto) { /* Replicate part of newSUB here. */ |
251 | ENTER; |
756cb477 |
252 | if (has_constant) { |
253 | /* newCONSTSUB takes ownership of the reference from us. */ |
254 | GvCV(gv) = newCONSTSUB(stash, name, has_constant); |
1ccdb730 |
255 | /* If this reference was a copy of another, then the subroutine |
256 | must have been "imported", by a Perl space assignment to a GV |
257 | from a reference to CV. */ |
258 | if (exported_constant) |
259 | GvIMPORTED_CV_on(gv); |
756cb477 |
260 | } else { |
756cb477 |
261 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
262 | GvCV(gv) = PL_compcv; |
263 | } |
55d729e4 |
264 | LEAVE; |
265 | |
e1a479c5 |
266 | mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */ |
65c50114 |
267 | CvGV(GvCV(gv)) = gv; |
e0d088d0 |
268 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 |
269 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
270 | if (proto) { |
ad64d0ec |
271 | sv_usepvn_flags(MUTABLE_SV(GvCV(gv)), proto, protolen, |
49a54bbe |
272 | SV_HAS_TRAILING_NUL); |
55d729e4 |
273 | } |
274 | } |
463ee0b2 |
275 | } |
276 | |
76e3520e |
277 | STATIC void |
fe9845cc |
278 | S_gv_init_sv(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e |
279 | { |
7918f24d |
280 | PERL_ARGS_ASSERT_GV_INIT_SV; |
281 | |
a0d0e21e |
282 | switch (sv_type) { |
283 | case SVt_PVIO: |
284 | (void)GvIOn(gv); |
285 | break; |
286 | case SVt_PVAV: |
287 | (void)GvAVn(gv); |
288 | break; |
289 | case SVt_PVHV: |
290 | (void)GvHVn(gv); |
291 | break; |
c69033f2 |
292 | #ifdef PERL_DONT_CREATE_GVSV |
293 | case SVt_NULL: |
294 | case SVt_PVCV: |
295 | case SVt_PVFM: |
e654831b |
296 | case SVt_PVGV: |
c69033f2 |
297 | break; |
298 | default: |
dbdce04c |
299 | if(GvSVn(gv)) { |
300 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 |
301 | If we just cast GvSVn(gv) to void, it ignores evaluating it for |
302 | its side effect */ |
303 | } |
c69033f2 |
304 | #endif |
a0d0e21e |
305 | } |
306 | } |
307 | |
954c1994 |
308 | /* |
309 | =for apidoc gv_fetchmeth |
310 | |
311 | Returns the glob with the given C<name> and a defined subroutine or |
312 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
313 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
314 | |
315 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
316 | side-effect creates a glob with the given C<name> in the given C<stash> |
317 | which in the case of success contains an alias for the subroutine, and sets |
e1a479c5 |
318 | up caching info for this glob. |
954c1994 |
319 | |
320 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
321 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
322 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
323 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
324 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
325 | |
326 | =cut |
327 | */ |
328 | |
e1a479c5 |
329 | /* NOTE: No support for tied ISA */ |
330 | |
79072805 |
331 | GV * |
864dbfa3 |
332 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
333 | { |
97aff369 |
334 | dVAR; |
463ee0b2 |
335 | GV** gvp; |
e1a479c5 |
336 | AV* linear_av; |
337 | SV** linear_svp; |
338 | SV* linear_sv; |
339 | HV* cstash; |
340 | GV* candidate = NULL; |
341 | CV* cand_cv = NULL; |
342 | CV* old_cv; |
343 | GV* topgv = NULL; |
bfcb3514 |
344 | const char *hvname; |
e1a479c5 |
345 | I32 create = (level >= 0) ? 1 : 0; |
346 | I32 items; |
347 | STRLEN packlen; |
348 | U32 topgen_cmp; |
a0d0e21e |
349 | |
7918f24d |
350 | PERL_ARGS_ASSERT_GV_FETCHMETH; |
351 | |
af09ea45 |
352 | /* UNIVERSAL methods should be callable without a stash */ |
353 | if (!stash) { |
e1a479c5 |
354 | create = 0; /* probably appropriate */ |
da51bb9b |
355 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 |
356 | return 0; |
357 | } |
358 | |
e1a479c5 |
359 | assert(stash); |
360 | |
bfcb3514 |
361 | hvname = HvNAME_get(stash); |
362 | if (!hvname) |
e1a479c5 |
363 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 |
364 | |
e1a479c5 |
365 | assert(hvname); |
366 | assert(name); |
463ee0b2 |
367 | |
bfcb3514 |
368 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a |
369 | |
dd69841b |
370 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 |
371 | |
372 | /* check locally for a real method or a cache entry */ |
373 | gvp = (GV**)hv_fetch(stash, name, len, create); |
374 | if(gvp) { |
375 | topgv = *gvp; |
376 | assert(topgv); |
377 | if (SvTYPE(topgv) != SVt_PVGV) |
378 | gv_init(topgv, stash, name, len, TRUE); |
379 | if ((cand_cv = GvCV(topgv))) { |
380 | /* If genuine method or valid cache entry, use it */ |
381 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { |
382 | return topgv; |
383 | } |
384 | else { |
385 | /* stale cache entry, junk it and move on */ |
386 | SvREFCNT_dec(cand_cv); |
387 | GvCV(topgv) = cand_cv = NULL; |
388 | GvCVGEN(topgv) = 0; |
389 | } |
390 | } |
391 | else if (GvCVGEN(topgv) == topgen_cmp) { |
392 | /* cache indicates no such method definitively */ |
393 | return 0; |
394 | } |
463ee0b2 |
395 | } |
79072805 |
396 | |
e1a479c5 |
397 | packlen = HvNAMELEN_get(stash); |
398 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { |
399 | HV* basestash; |
400 | packlen -= 7; |
401 | basestash = gv_stashpvn(hvname, packlen, GV_ADD); |
402 | linear_av = mro_get_linear_isa(basestash); |
9607fc9c |
403 | } |
e1a479c5 |
404 | else { |
405 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ |
79072805 |
406 | } |
a0d0e21e |
407 | |
e1a479c5 |
408 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
409 | items = AvFILLp(linear_av); /* no +1, to skip over self */ |
410 | while (items--) { |
411 | linear_sv = *linear_svp++; |
412 | assert(linear_sv); |
413 | cstash = gv_stashsv(linear_sv, 0); |
414 | |
dd69841b |
415 | if (!cstash) { |
a2a5de95 |
416 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA", |
417 | SVfARG(linear_sv), hvname); |
e1a479c5 |
418 | continue; |
419 | } |
9607fc9c |
420 | |
e1a479c5 |
421 | assert(cstash); |
422 | |
423 | gvp = (GV**)hv_fetch(cstash, name, len, 0); |
424 | if (!gvp) continue; |
425 | candidate = *gvp; |
426 | assert(candidate); |
427 | if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE); |
428 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { |
429 | /* |
430 | * Found real method, cache method in topgv if: |
431 | * 1. topgv has no synonyms (else inheritance crosses wires) |
432 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
433 | */ |
434 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { |
435 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); |
436 | SvREFCNT_inc_simple_void_NN(cand_cv); |
437 | GvCV(topgv) = cand_cv; |
438 | GvCVGEN(topgv) = topgen_cmp; |
439 | } |
440 | return candidate; |
441 | } |
442 | } |
9607fc9c |
443 | |
e1a479c5 |
444 | /* Check UNIVERSAL without caching */ |
445 | if(level == 0 || level == -1) { |
446 | candidate = gv_fetchmeth(NULL, name, len, 1); |
447 | if(candidate) { |
448 | cand_cv = GvCV(candidate); |
449 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { |
450 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); |
451 | SvREFCNT_inc_simple_void_NN(cand_cv); |
452 | GvCV(topgv) = cand_cv; |
453 | GvCVGEN(topgv) = topgen_cmp; |
454 | } |
455 | return candidate; |
456 | } |
457 | } |
458 | |
459 | if (topgv && GvREFCNT(topgv) == 1) { |
460 | /* cache the fact that the method is not defined */ |
461 | GvCVGEN(topgv) = topgen_cmp; |
a0d0e21e |
462 | } |
463 | |
79072805 |
464 | return 0; |
465 | } |
466 | |
954c1994 |
467 | /* |
611c1e95 |
468 | =for apidoc gv_fetchmeth_autoload |
469 | |
470 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. |
471 | Returns a glob for the subroutine. |
472 | |
473 | For an autoloaded subroutine without a GV, will create a GV even |
474 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() |
475 | of the result may be zero. |
476 | |
477 | =cut |
478 | */ |
479 | |
480 | GV * |
481 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
482 | { |
483 | GV *gv = gv_fetchmeth(stash, name, len, level); |
484 | |
7918f24d |
485 | PERL_ARGS_ASSERT_GV_FETCHMETH_AUTOLOAD; |
486 | |
611c1e95 |
487 | if (!gv) { |
611c1e95 |
488 | CV *cv; |
489 | GV **gvp; |
490 | |
491 | if (!stash) |
6136c704 |
492 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b |
493 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 |
494 | return NULL; |
5c7983e5 |
495 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 |
496 | return NULL; |
611c1e95 |
497 | cv = GvCV(gv); |
498 | if (!(CvROOT(cv) || CvXSUB(cv))) |
6136c704 |
499 | return NULL; |
611c1e95 |
500 | /* Have an autoload */ |
501 | if (level < 0) /* Cannot do without a stub */ |
502 | gv_fetchmeth(stash, name, len, 0); |
503 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
504 | if (!gvp) |
6136c704 |
505 | return NULL; |
611c1e95 |
506 | return *gvp; |
507 | } |
508 | return gv; |
509 | } |
510 | |
511 | /* |
954c1994 |
512 | =for apidoc gv_fetchmethod_autoload |
513 | |
514 | Returns the glob which contains the subroutine to call to invoke the method |
515 | on the C<stash>. In fact in the presence of autoloading this may be the |
516 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
517 | already setup. |
954c1994 |
518 | |
519 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
520 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
521 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
522 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
523 | with a non-zero C<autoload> parameter. |
954c1994 |
524 | |
525 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
526 | that if you want to keep the returned glob for a long time, you need to |
527 | check for it being "AUTOLOAD", since at the later time the call may load a |
528 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
529 | created via a side effect to do this. |
954c1994 |
530 | |
531 | These functions have the same side-effects and as C<gv_fetchmeth> with |
532 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
533 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
534 | C<call_sv> apply equally to these functions. |
954c1994 |
535 | |
536 | =cut |
537 | */ |
538 | |
7d3b1f61 |
539 | STATIC HV* |
540 | S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen) |
541 | { |
542 | AV* superisa; |
543 | GV** gvp; |
544 | GV* gv; |
545 | HV* stash; |
546 | |
7918f24d |
547 | PERL_ARGS_ASSERT_GV_GET_SUPER_PKG; |
548 | |
7d3b1f61 |
549 | stash = gv_stashpvn(name, namelen, 0); |
550 | if(stash) return stash; |
551 | |
552 | /* If we must create it, give it an @ISA array containing |
553 | the real package this SUPER is for, so that it's tied |
554 | into the cache invalidation code correctly */ |
555 | stash = gv_stashpvn(name, namelen, GV_ADD); |
556 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); |
557 | gv = *gvp; |
558 | gv_init(gv, stash, "ISA", 3, TRUE); |
559 | superisa = GvAVn(gv); |
560 | GvMULTI_on(gv); |
ad64d0ec |
561 | sv_magic(MUTABLE_SV(superisa), MUTABLE_SV(gv), PERL_MAGIC_isa, NULL, 0); |
8e3a4a30 |
562 | #ifdef USE_ITHREADS |
7d3b1f61 |
563 | av_push(superisa, newSVpv(CopSTASHPV(PL_curcop), 0)); |
8e3a4a30 |
564 | #else |
565 | av_push(superisa, newSVhek(CopSTASH(PL_curcop) |
566 | ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL)); |
567 | #endif |
7d3b1f61 |
568 | |
569 | return stash; |
570 | } |
571 | |
dc848c6f |
572 | GV * |
864dbfa3 |
573 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
574 | { |
547bb267 |
575 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
576 | |
256d1bb2 |
577 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
578 | } |
579 | |
580 | /* Don't merge this yet, as it's likely to get a len parameter, and possibly |
581 | even a U32 hash */ |
582 | GV * |
583 | Perl_gv_fetchmethod_flags(pTHX_ HV *stash, const char *name, U32 flags) |
584 | { |
97aff369 |
585 | dVAR; |
08105a92 |
586 | register const char *nend; |
c445ea15 |
587 | const char *nsplit = NULL; |
a0d0e21e |
588 | GV* gv; |
0dae17bd |
589 | HV* ostash = stash; |
c94593d0 |
590 | const char * const origname = name; |
ad64d0ec |
591 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 |
592 | const U32 autoload = flags & GV_AUTOLOAD; |
593 | const U32 do_croak = flags & GV_CROAK; |
0dae17bd |
594 | |
547bb267 |
595 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_FLAGS; |
7918f24d |
596 | |
eff494dd |
597 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 |
598 | stash = NULL; |
c9bf4021 |
599 | else { |
600 | /* The only way stash can become NULL later on is if nsplit is set, |
601 | which in turn means that there is no need for a SVt_PVHV case |
602 | the error reporting code. */ |
603 | } |
b267980d |
604 | |
463ee0b2 |
605 | for (nend = name; *nend; nend++) { |
c94593d0 |
606 | if (*nend == '\'') { |
a0d0e21e |
607 | nsplit = nend; |
c94593d0 |
608 | name = nend + 1; |
609 | } |
610 | else if (*nend == ':' && *(nend + 1) == ':') { |
611 | nsplit = nend++; |
612 | name = nend + 1; |
613 | } |
a0d0e21e |
614 | } |
615 | if (nsplit) { |
7edbdc6b |
616 | if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) { |
9607fc9c |
617 | /* ->SUPER::method should really be looked up in original stash */ |
b37c2d43 |
618 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
619 | CopSTASHPV(PL_curcop))); |
af09ea45 |
620 | /* __PACKAGE__::SUPER stash should be autovivified */ |
7d3b1f61 |
621 | stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr)); |
cea2e8a9 |
622 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 |
623 | origname, HvNAME_get(stash), name) ); |
4633a7c4 |
624 | } |
e189a56d |
625 | else { |
af09ea45 |
626 | /* don't autovifify if ->NoSuchStash::method */ |
da51bb9b |
627 | stash = gv_stashpvn(origname, nsplit - origname, 0); |
e189a56d |
628 | |
629 | /* however, explicit calls to Pkg::SUPER::method may |
630 | happen, and may require autovivification to work */ |
631 | if (!stash && (nsplit - origname) >= 7 && |
632 | strnEQ(nsplit - 7, "::SUPER", 7) && |
da51bb9b |
633 | gv_stashpvn(origname, nsplit - origname - 7, 0)) |
7d3b1f61 |
634 | stash = gv_get_super_pkg(origname, nsplit - origname); |
e189a56d |
635 | } |
0dae17bd |
636 | ostash = stash; |
4633a7c4 |
637 | } |
638 | |
9607fc9c |
639 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
640 | if (!gv) { |
2f6e0fe7 |
641 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
159b6efe |
642 | gv = MUTABLE_GV(&PL_sv_yes); |
dc848c6f |
643 | else if (autoload) |
0dae17bd |
644 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
256d1bb2 |
645 | if (!gv && do_croak) { |
646 | /* Right now this is exclusively for the benefit of S_method_common |
647 | in pp_hot.c */ |
648 | if (stash) { |
649 | Perl_croak(aTHX_ |
650 | "Can't locate object method \"%s\" via package \"%.*s\"", |
c49b597d |
651 | name, (int)HvNAMELEN_get(stash), HvNAME_get(stash)); |
256d1bb2 |
652 | } |
653 | else { |
654 | STRLEN packlen; |
655 | const char *packname; |
656 | |
256d1bb2 |
657 | if (nsplit) { |
658 | packlen = nsplit - origname; |
659 | packname = origname; |
256d1bb2 |
660 | } else { |
661 | packname = SvPV_const(error_report, packlen); |
662 | } |
663 | |
664 | Perl_croak(aTHX_ |
665 | "Can't locate object method \"%s\" via package \"%.*s\"" |
666 | " (perhaps you forgot to load \"%.*s\"?)", |
667 | name, (int)packlen, packname, (int)packlen, packname); |
668 | } |
669 | } |
463ee0b2 |
670 | } |
dc848c6f |
671 | else if (autoload) { |
9d4ba2ae |
672 | CV* const cv = GvCV(gv); |
09280a33 |
673 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
674 | GV* stubgv; |
675 | GV* autogv; |
676 | |
677 | if (CvANON(cv)) |
678 | stubgv = gv; |
679 | else { |
680 | stubgv = CvGV(cv); |
681 | if (GvCV(stubgv) != cv) /* orphaned import */ |
682 | stubgv = gv; |
683 | } |
684 | autogv = gv_autoload4(GvSTASH(stubgv), |
685 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
686 | if (autogv) |
687 | gv = autogv; |
688 | } |
689 | } |
44a8e56a |
690 | |
691 | return gv; |
692 | } |
693 | |
694 | GV* |
864dbfa3 |
695 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
696 | { |
27da23d5 |
697 | dVAR; |
44a8e56a |
698 | GV* gv; |
699 | CV* cv; |
700 | HV* varstash; |
701 | GV* vargv; |
702 | SV* varsv; |
e1ec3a88 |
703 | const char *packname = ""; |
eae70eaa |
704 | STRLEN packname_len = 0; |
44a8e56a |
705 | |
7918f24d |
706 | PERL_ARGS_ASSERT_GV_AUTOLOAD4; |
707 | |
7edbdc6b |
708 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c |
709 | return NULL; |
0dae17bd |
710 | if (stash) { |
711 | if (SvTYPE(stash) < SVt_PVHV) { |
ad64d0ec |
712 | packname = SvPV_const(MUTABLE_SV(stash), packname_len); |
5c284bb0 |
713 | stash = NULL; |
0dae17bd |
714 | } |
715 | else { |
bfcb3514 |
716 | packname = HvNAME_get(stash); |
7423f6db |
717 | packname_len = HvNAMELEN_get(stash); |
0dae17bd |
718 | } |
719 | } |
5c7983e5 |
720 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c |
721 | return NULL; |
dc848c6f |
722 | cv = GvCV(gv); |
723 | |
adb5a9ae |
724 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c |
725 | return NULL; |
ed850460 |
726 | |
dc848c6f |
727 | /* |
728 | * Inheriting AUTOLOAD for non-methods works ... for now. |
729 | */ |
041457d9 |
730 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
041457d9 |
731 | ) |
d1d15184 |
732 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
733 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
734 | packname, (int)len, name); |
44a8e56a |
735 | |
aed2304a |
736 | if (CvISXSUB(cv)) { |
adb5a9ae |
737 | /* rather than lookup/init $AUTOLOAD here |
738 | * only to have the XSUB do another lookup for $AUTOLOAD |
739 | * and split that value on the last '::', |
740 | * pass along the same data via some unused fields in the CV |
741 | */ |
742 | CvSTASH(cv) = stash; |
f880fe2f |
743 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 |
744 | SvCUR_set(cv, len); |
adb5a9ae |
745 | return gv; |
746 | } |
adb5a9ae |
747 | |
44a8e56a |
748 | /* |
749 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
750 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
751 | * use that, but for lack of anything better we will use the sub's |
752 | * original package to look up $AUTOLOAD. |
753 | */ |
754 | varstash = GvSTASH(CvGV(cv)); |
5c7983e5 |
755 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b |
756 | ENTER; |
757 | |
c69033f2 |
758 | if (!isGV(vargv)) { |
5c7983e5 |
759 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 |
760 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 |
761 | GvSV(vargv) = newSV(0); |
c69033f2 |
762 | #endif |
763 | } |
3d35f11b |
764 | LEAVE; |
e203899d |
765 | varsv = GvSVn(vargv); |
7423f6db |
766 | sv_setpvn(varsv, packname, packname_len); |
396482e1 |
767 | sv_catpvs(varsv, "::"); |
44a8e56a |
768 | sv_catpvn(varsv, name, len); |
a0d0e21e |
769 | return gv; |
770 | } |
771 | |
44a2ac75 |
772 | |
773 | /* require_tie_mod() internal routine for requiring a module |
774 | * that implements the logic of automatical ties like %! and %- |
775 | * |
776 | * The "gv" parameter should be the glob. |
45cbc99a |
777 | * "varpv" holds the name of the var, used for error messages. |
778 | * "namesv" holds the module name. Its refcount will be decremented. |
44a2ac75 |
779 | * "methpv" holds the method name to test for to check that things |
45cbc99a |
780 | * are working reasonably close to as expected. |
781 | * "flags": if flag & 1 then save the scalar before loading. |
44a2ac75 |
782 | * For the protection of $! to work (it is set by this routine) |
783 | * the sv slot must already be magicalized. |
d2c93421 |
784 | */ |
44a2ac75 |
785 | STATIC HV* |
786 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) |
d2c93421 |
787 | { |
27da23d5 |
788 | dVAR; |
da51bb9b |
789 | HV* stash = gv_stashsv(namesv, 0); |
45cbc99a |
790 | |
7918f24d |
791 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
792 | |
44a2ac75 |
793 | if (!stash || !(gv_fetchmethod(stash, methpv))) { |
45cbc99a |
794 | SV *module = newSVsv(namesv); |
795 | char varname = *varpv; /* varpv might be clobbered by load_module, |
796 | so save it. For the moment it's always |
797 | a single char. */ |
d2c93421 |
798 | dSP; |
d2c93421 |
799 | ENTER; |
44a2ac75 |
800 | if ( flags & 1 ) |
45cbc99a |
801 | save_scalar(gv); |
cac54379 |
802 | PUSHSTACKi(PERLSI_MAGIC); |
45cbc99a |
803 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
cac54379 |
804 | POPSTACK; |
d2c93421 |
805 | LEAVE; |
806 | SPAGAIN; |
da51bb9b |
807 | stash = gv_stashsv(namesv, 0); |
44a2ac75 |
808 | if (!stash) |
45cbc99a |
809 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available", |
810 | varname, SVfARG(namesv)); |
811 | else if (!gv_fetchmethod(stash, methpv)) |
812 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s", |
813 | varname, SVfARG(namesv), methpv); |
d2c93421 |
814 | } |
45cbc99a |
815 | SvREFCNT_dec(namesv); |
44a2ac75 |
816 | return stash; |
d2c93421 |
817 | } |
818 | |
954c1994 |
819 | /* |
820 | =for apidoc gv_stashpv |
821 | |
da51bb9b |
822 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 |
823 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 |
824 | |
825 | =cut |
826 | */ |
827 | |
a0d0e21e |
828 | HV* |
864dbfa3 |
829 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
830 | { |
7918f24d |
831 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 |
832 | return gv_stashpvn(name, strlen(name), create); |
833 | } |
834 | |
bc96cb06 |
835 | /* |
836 | =for apidoc gv_stashpvn |
837 | |
da51bb9b |
838 | Returns a pointer to the stash for a specified package. The C<namelen> |
839 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed |
840 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be |
841 | created if it does not already exist. If the package does not exist and |
842 | C<flags> is 0 (or any other setting that does not create packages) then NULL |
843 | is returned. |
844 | |
bc96cb06 |
845 | |
846 | =cut |
847 | */ |
848 | |
dc437b57 |
849 | HV* |
da51bb9b |
850 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 |
851 | { |
0cea0058 |
852 | char smallbuf[128]; |
46fc3d4c |
853 | char *tmpbuf; |
a0d0e21e |
854 | HV *stash; |
855 | GV *tmpgv; |
add0ecde |
856 | U32 tmplen = namelen + 2; |
dc437b57 |
857 | |
7918f24d |
858 | PERL_ARGS_ASSERT_GV_STASHPVN; |
859 | |
add0ecde |
860 | if (tmplen <= sizeof smallbuf) |
46fc3d4c |
861 | tmpbuf = smallbuf; |
862 | else |
add0ecde |
863 | Newx(tmpbuf, tmplen, char); |
864 | Copy(name, tmpbuf, namelen, char); |
865 | tmpbuf[namelen] = ':'; |
866 | tmpbuf[namelen+1] = ':'; |
867 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); |
46fc3d4c |
868 | if (tmpbuf != smallbuf) |
869 | Safefree(tmpbuf); |
a0d0e21e |
870 | if (!tmpgv) |
da51bb9b |
871 | return NULL; |
a0d0e21e |
872 | if (!GvHV(tmpgv)) |
873 | GvHV(tmpgv) = newHV(); |
874 | stash = GvHV(tmpgv); |
bfcb3514 |
875 | if (!HvNAME_get(stash)) |
51a37f80 |
876 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e |
877 | return stash; |
463ee0b2 |
878 | } |
879 | |
954c1994 |
880 | /* |
881 | =for apidoc gv_stashsv |
882 | |
da51bb9b |
883 | Returns a pointer to the stash for a specified package. See C<gv_stashpvn>. |
954c1994 |
884 | |
885 | =cut |
886 | */ |
887 | |
a0d0e21e |
888 | HV* |
da51bb9b |
889 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e |
890 | { |
dc437b57 |
891 | STRLEN len; |
9d4ba2ae |
892 | const char * const ptr = SvPV_const(sv,len); |
7918f24d |
893 | |
894 | PERL_ARGS_ASSERT_GV_STASHSV; |
895 | |
da51bb9b |
896 | return gv_stashpvn(ptr, len, flags); |
a0d0e21e |
897 | } |
898 | |
899 | |
463ee0b2 |
900 | GV * |
fe9845cc |
901 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) { |
7918f24d |
902 | PERL_ARGS_ASSERT_GV_FETCHPV; |
b7787f18 |
903 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d |
904 | } |
905 | |
906 | GV * |
fe9845cc |
907 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d |
908 | STRLEN len; |
9d4ba2ae |
909 | const char * const nambeg = SvPV_const(name, len); |
7918f24d |
910 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d |
911 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
912 | } |
913 | |
914 | GV * |
915 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, |
fe9845cc |
916 | const svtype sv_type) |
79072805 |
917 | { |
97aff369 |
918 | dVAR; |
08105a92 |
919 | register const char *name = nambeg; |
c445ea15 |
920 | register GV *gv = NULL; |
79072805 |
921 | GV**gvp; |
79072805 |
922 | I32 len; |
b3d904f3 |
923 | register const char *name_cursor; |
c445ea15 |
924 | HV *stash = NULL; |
add2581e |
925 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a |
926 | const I32 no_expand = flags & GV_NOEXPAND; |
780a5241 |
927 | const I32 add = flags & ~GV_NOADD_MASK; |
b3d904f3 |
928 | const char *const name_end = nambeg + full_len; |
929 | const char *const name_em1 = name_end - 1; |
5e0caaeb |
930 | U32 faking_it; |
79072805 |
931 | |
7918f24d |
932 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; |
933 | |
fafc274c |
934 | if (flags & GV_NOTQUAL) { |
935 | /* Caller promised that there is no stash, so we can skip the check. */ |
936 | len = full_len; |
937 | goto no_stash; |
938 | } |
939 | |
b208e10c |
940 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
941 | /* accidental stringify on a GV? */ |
c07a80fd |
942 | name++; |
b208e10c |
943 | } |
c07a80fd |
944 | |
b3d904f3 |
945 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
946 | if ((*name_cursor == ':' && name_cursor < name_em1 |
947 | && name_cursor[1] == ':') |
948 | || (*name_cursor == '\'' && name_cursor[1])) |
463ee0b2 |
949 | { |
463ee0b2 |
950 | if (!stash) |
3280af22 |
951 | stash = PL_defstash; |
dc437b57 |
952 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
953 | return NULL; |
463ee0b2 |
954 | |
b3d904f3 |
955 | len = name_cursor - name; |
85e6fe83 |
956 | if (len > 0) { |
0cea0058 |
957 | char smallbuf[128]; |
62b57502 |
958 | char *tmpbuf; |
62b57502 |
959 | |
798b63bc |
960 | if (len + 2 <= (I32)sizeof (smallbuf)) |
3c78fafa |
961 | tmpbuf = smallbuf; |
62b57502 |
962 | else |
2ae0db35 |
963 | Newx(tmpbuf, len+2, char); |
a0d0e21e |
964 | Copy(name, tmpbuf, len, char); |
965 | tmpbuf[len++] = ':'; |
966 | tmpbuf[len++] = ':'; |
463ee0b2 |
967 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
a0714e2c |
968 | gv = gvp ? *gvp : NULL; |
159b6efe |
969 | if (gv && gv != (const GV *)&PL_sv_undef) { |
6fa846a0 |
970 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
971 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
972 | else |
973 | GvMULTI_on(gv); |
974 | } |
3c78fafa |
975 | if (tmpbuf != smallbuf) |
62b57502 |
976 | Safefree(tmpbuf); |
159b6efe |
977 | if (!gv || gv == (const GV *)&PL_sv_undef) |
a0714e2c |
978 | return NULL; |
85e6fe83 |
979 | |
463ee0b2 |
980 | if (!(stash = GvHV(gv))) |
981 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
982 | |
bfcb3514 |
983 | if (!HvNAME_get(stash)) |
b3d904f3 |
984 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); |
463ee0b2 |
985 | } |
986 | |
b3d904f3 |
987 | if (*name_cursor == ':') |
988 | name_cursor++; |
989 | name_cursor++; |
990 | name = name_cursor; |
ad6bfa9d |
991 | if (name == name_end) |
159b6efe |
992 | return gv |
993 | ? gv : MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); |
79072805 |
994 | } |
79072805 |
995 | } |
b3d904f3 |
996 | len = name_cursor - name; |
463ee0b2 |
997 | |
998 | /* No stash in name, so see how we can default */ |
999 | |
1000 | if (!stash) { |
fafc274c |
1001 | no_stash: |
8ccce9ae |
1002 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c |
1003 | bool global = FALSE; |
1004 | |
8ccce9ae |
1005 | switch (len) { |
1006 | case 1: |
18ea00d7 |
1007 | if (*name == '_') |
9d116dd7 |
1008 | global = TRUE; |
18ea00d7 |
1009 | break; |
8ccce9ae |
1010 | case 3: |
1011 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') |
1012 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') |
1013 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) |
9d116dd7 |
1014 | global = TRUE; |
18ea00d7 |
1015 | break; |
8ccce9ae |
1016 | case 4: |
1017 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
1018 | && name[3] == 'V') |
9d116dd7 |
1019 | global = TRUE; |
18ea00d7 |
1020 | break; |
8ccce9ae |
1021 | case 5: |
1022 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' |
1023 | && name[3] == 'I' && name[4] == 'N') |
463ee0b2 |
1024 | global = TRUE; |
18ea00d7 |
1025 | break; |
8ccce9ae |
1026 | case 6: |
1027 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') |
1028 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') |
1029 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) |
1030 | global = TRUE; |
1031 | break; |
1032 | case 7: |
1033 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
1034 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' |
1035 | && name[6] == 'T') |
18ea00d7 |
1036 | global = TRUE; |
1037 | break; |
463ee0b2 |
1038 | } |
9607fc9c |
1039 | |
463ee0b2 |
1040 | if (global) |
3280af22 |
1041 | stash = PL_defstash; |
923e4eb5 |
1042 | else if (IN_PERL_COMPILETIME) { |
3280af22 |
1043 | stash = PL_curstash; |
1044 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
1045 | sv_type != SVt_PVCV && |
1046 | sv_type != SVt_PVGV && |
4633a7c4 |
1047 | sv_type != SVt_PVFM && |
c07a80fd |
1048 | sv_type != SVt_PVIO && |
70ec6265 |
1049 | !(len == 1 && sv_type == SVt_PV && |
1050 | (*name == 'a' || *name == 'b')) ) |
748a9306 |
1051 | { |
4633a7c4 |
1052 | gvp = (GV**)hv_fetch(stash,name,len,0); |
1053 | if (!gvp || |
159b6efe |
1054 | *gvp == (const GV *)&PL_sv_undef || |
a5f75d66 |
1055 | SvTYPE(*gvp) != SVt_PVGV) |
1056 | { |
d4c19fe8 |
1057 | stash = NULL; |
a5f75d66 |
1058 | } |
155aba94 |
1059 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
1060 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
1061 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
1062 | { |
fe13d51d |
1063 | /* diag_listed_as: Variable "%s" is not imported%s */ |
cea2e8a9 |
1064 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
1065 | sv_type == SVt_PVAV ? '@' : |
1066 | sv_type == SVt_PVHV ? '%' : '$', |
1067 | name); |
8ebc5c01 |
1068 | if (GvCVu(*gvp)) |
cc507455 |
1069 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
d4c19fe8 |
1070 | stash = NULL; |
4633a7c4 |
1071 | } |
a0d0e21e |
1072 | } |
85e6fe83 |
1073 | } |
463ee0b2 |
1074 | else |
1d7c1841 |
1075 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
1076 | } |
1077 | else |
3280af22 |
1078 | stash = PL_defstash; |
463ee0b2 |
1079 | } |
1080 | |
1081 | /* By this point we should have a stash and a name */ |
1082 | |
a0d0e21e |
1083 | if (!stash) { |
5a844595 |
1084 | if (add) { |
9d4ba2ae |
1085 | SV * const err = Perl_mess(aTHX_ |
5a844595 |
1086 | "Global symbol \"%s%s\" requires explicit package name", |
1087 | (sv_type == SVt_PV ? "$" |
1088 | : sv_type == SVt_PVAV ? "@" |
1089 | : sv_type == SVt_PVHV ? "%" |
608b3986 |
1090 | : ""), name); |
e7f343b6 |
1091 | GV *gv; |
608b3986 |
1092 | if (USE_UTF8_IN_NAMES) |
1093 | SvUTF8_on(err); |
1094 | qerror(err); |
76f68e9b |
1095 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
e7f343b6 |
1096 | if(!gv) { |
1097 | /* symbol table under destruction */ |
1098 | return NULL; |
1099 | } |
1100 | stash = GvHV(gv); |
a0d0e21e |
1101 | } |
d7aacf4e |
1102 | else |
a0714e2c |
1103 | return NULL; |
a0d0e21e |
1104 | } |
1105 | |
1106 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
1107 | return NULL; |
a0d0e21e |
1108 | |
79072805 |
1109 | gvp = (GV**)hv_fetch(stash,name,len,add); |
159b6efe |
1110 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) |
a0714e2c |
1111 | return NULL; |
79072805 |
1112 | gv = *gvp; |
1113 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
1114 | if (add) { |
a5f75d66 |
1115 | GvMULTI_on(gv); |
a0d0e21e |
1116 | gv_init_sv(gv, sv_type); |
45cbc99a |
1117 | if (len == 1 && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) { |
44a2ac75 |
1118 | if (*name == '!') |
1119 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
45cbc99a |
1120 | else if (*name == '-' || *name == '+') |
192b9cd1 |
1121 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
45cbc99a |
1122 | } |
a0d0e21e |
1123 | } |
79072805 |
1124 | return gv; |
add2581e |
1125 | } else if (no_init) { |
55d729e4 |
1126 | return gv; |
e26df76a |
1127 | } else if (no_expand && SvROK(gv)) { |
1128 | return gv; |
79072805 |
1129 | } |
93a17b20 |
1130 | |
5e0caaeb |
1131 | /* Adding a new symbol. |
1132 | Unless of course there was already something non-GV here, in which case |
1133 | we want to behave as if there was always a GV here, containing some sort |
1134 | of subroutine. |
1135 | Otherwise we run the risk of creating things like GvIO, which can cause |
1136 | subtle bugs. eg the one that tripped up SQL::Translator */ |
1137 | |
1138 | faking_it = SvOK(gv); |
93a17b20 |
1139 | |
9b387841 |
1140 | if (add & GV_ADDWARN) |
1141 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 |
1142 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
5e0caaeb |
1143 | gv_init_sv(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 |
1144 | |
a0288114 |
1145 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d |
1146 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
1147 | GvMULTI_on(gv) ; |
1148 | |
93a17b20 |
1149 | /* set up magic where warranted */ |
cc4c2da6 |
1150 | if (len > 1) { |
9431620d |
1151 | #ifndef EBCDIC |
cc4c2da6 |
1152 | if (*name > 'V' ) { |
6f207bd3 |
1153 | NOOP; |
cc4c2da6 |
1154 | /* Nothing else to do. |
91f565cb |
1155 | The compiler will probably turn the switch statement into a |
cc4c2da6 |
1156 | branch table. Make sure we avoid even that small overhead for |
1157 | the common case of lower case variable names. */ |
9431620d |
1158 | } else |
1159 | #endif |
1160 | { |
b464bac0 |
1161 | const char * const name2 = name + 1; |
cc4c2da6 |
1162 | switch (*name) { |
1163 | case 'A': |
1164 | if (strEQ(name2, "RGV")) { |
1165 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
1166 | } |
7b8203e3 |
1167 | else if (strEQ(name2, "RGVOUT")) { |
1168 | GvMULTI_on(gv); |
1169 | } |
cc4c2da6 |
1170 | break; |
1171 | case 'E': |
1172 | if (strnEQ(name2, "XPORT", 5)) |
1173 | GvMULTI_on(gv); |
1174 | break; |
1175 | case 'I': |
1176 | if (strEQ(name2, "SA")) { |
9d4ba2ae |
1177 | AV* const av = GvAVn(gv); |
cc4c2da6 |
1178 | GvMULTI_on(gv); |
ad64d0ec |
1179 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, |
1180 | NULL, 0); |
cc4c2da6 |
1181 | /* NOTE: No support for tied ISA */ |
1182 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
1183 | && AvFILLp(av) == -1) |
1184 | { |
e84ce9a2 |
1185 | av_push(av, newSVpvs("NDBM_File")); |
1186 | gv_stashpvs("NDBM_File", GV_ADD); |
1187 | av_push(av, newSVpvs("DB_File")); |
1188 | gv_stashpvs("DB_File", GV_ADD); |
1189 | av_push(av, newSVpvs("GDBM_File")); |
1190 | gv_stashpvs("GDBM_File", GV_ADD); |
1191 | av_push(av, newSVpvs("SDBM_File")); |
1192 | gv_stashpvs("SDBM_File", GV_ADD); |
1193 | av_push(av, newSVpvs("ODBM_File")); |
1194 | gv_stashpvs("ODBM_File", GV_ADD); |
cc4c2da6 |
1195 | } |
1196 | } |
1197 | break; |
1198 | case 'O': |
1199 | if (strEQ(name2, "VERLOAD")) { |
9d4ba2ae |
1200 | HV* const hv = GvHVn(gv); |
cc4c2da6 |
1201 | GvMULTI_on(gv); |
a0714e2c |
1202 | hv_magic(hv, NULL, PERL_MAGIC_overload); |
cc4c2da6 |
1203 | } |
1204 | break; |
1205 | case 'S': |
1206 | if (strEQ(name2, "IG")) { |
1207 | HV *hv; |
1208 | I32 i; |
d525a7b2 |
1209 | if (!PL_psig_name) { |
1210 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); |
a02a5408 |
1211 | Newxz(PL_psig_pend, SIG_SIZE, int); |
d525a7b2 |
1212 | PL_psig_ptr = PL_psig_name + SIG_SIZE; |
0bdedcb3 |
1213 | } else { |
1214 | /* I think that the only way to get here is to re-use an |
1215 | embedded perl interpreter, where the previous |
1216 | use didn't clean up fully because |
1217 | PL_perl_destruct_level was 0. I'm not sure that we |
1218 | "support" that, in that I suspect in that scenario |
1219 | there are sufficient other garbage values left in the |
1220 | interpreter structure that something else will crash |
1221 | before we get here. I suspect that this is one of |
1222 | those "doctor, it hurts when I do this" bugs. */ |
d525a7b2 |
1223 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); |
0bdedcb3 |
1224 | Zero(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 |
1225 | } |
1226 | GvMULTI_on(gv); |
1227 | hv = GvHVn(gv); |
a0714e2c |
1228 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 |
1229 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 |
1230 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 |
1231 | if (init) |
1232 | sv_setsv(*init, &PL_sv_undef); |
cc4c2da6 |
1233 | } |
1234 | } |
1235 | break; |
1236 | case 'V': |
1237 | if (strEQ(name2, "ERSION")) |
1238 | GvMULTI_on(gv); |
1239 | break; |
e5218da5 |
1240 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1241 | if (strEQ(name2, "HILD_ERROR_NATIVE")) |
1242 | goto magicalize; |
1243 | break; |
cc4c2da6 |
1244 | case '\005': /* $^ENCODING */ |
1245 | if (strEQ(name2, "NCODING")) |
1246 | goto magicalize; |
1247 | break; |
cde0cee5 |
1248 | case '\015': /* $^MATCH */ |
1249 | if (strEQ(name2, "ATCH")) |
2fdbfb4d |
1250 | goto magicalize; |
cc4c2da6 |
1251 | case '\017': /* $^OPEN */ |
1252 | if (strEQ(name2, "PEN")) |
1253 | goto magicalize; |
1254 | break; |
cde0cee5 |
1255 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
1256 | if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH")) |
2fdbfb4d |
1257 | goto magicalize; |
cc4c2da6 |
1258 | case '\024': /* ${^TAINT} */ |
1259 | if (strEQ(name2, "AINT")) |
1260 | goto ro_magicalize; |
1261 | break; |
7cebcbc0 |
1262 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 |
1263 | if (strEQ(name2, "NICODE")) |
cc4c2da6 |
1264 | goto ro_magicalize; |
a0288114 |
1265 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 |
1266 | goto ro_magicalize; |
e07ea26a |
1267 | if (strEQ(name2, "TF8CACHE")) |
1268 | goto magicalize; |
cc4c2da6 |
1269 | break; |
1270 | case '\027': /* $^WARNING_BITS */ |
1271 | if (strEQ(name2, "ARNING_BITS")) |
1272 | goto magicalize; |
1273 | break; |
1274 | case '1': |
1275 | case '2': |
1276 | case '3': |
1277 | case '4': |
1278 | case '5': |
1279 | case '6': |
1280 | case '7': |
1281 | case '8': |
1282 | case '9': |
85e6fe83 |
1283 | { |
2fdbfb4d |
1284 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
1285 | this test */ |
1286 | /* This snippet is taken from is_gv_magical */ |
cc4c2da6 |
1287 | const char *end = name + len; |
1288 | while (--end > name) { |
2fdbfb4d |
1289 | if (!isDIGIT(*end)) return gv; |
cc4c2da6 |
1290 | } |
2fdbfb4d |
1291 | goto magicalize; |
1d7c1841 |
1292 | } |
dc437b57 |
1293 | } |
93a17b20 |
1294 | } |
392db708 |
1295 | } else { |
1296 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will |
1297 | be case '\0' in this switch statement (ie a default case) */ |
cc4c2da6 |
1298 | switch (*name) { |
1299 | case '&': |
1300 | case '`': |
1301 | case '\'': |
1302 | if ( |
1303 | sv_type == SVt_PVAV || |
1304 | sv_type == SVt_PVHV || |
1305 | sv_type == SVt_PVCV || |
1306 | sv_type == SVt_PVFM || |
1307 | sv_type == SVt_PVIO |
1308 | ) { break; } |
1309 | PL_sawampersand = TRUE; |
2fdbfb4d |
1310 | goto magicalize; |
cc4c2da6 |
1311 | |
1312 | case ':': |
c69033f2 |
1313 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 |
1314 | goto magicalize; |
1315 | |
1316 | case '?': |
ff0cee69 |
1317 | #ifdef COMPLEX_STATUS |
c69033f2 |
1318 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 |
1319 | #endif |
cc4c2da6 |
1320 | goto magicalize; |
ff0cee69 |
1321 | |
cc4c2da6 |
1322 | case '!': |
67261566 |
1323 | GvMULTI_on(gv); |
44a2ac75 |
1324 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 |
1325 | |
ad64d0ec |
1326 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 |
1327 | |
44a2ac75 |
1328 | /* magicalization must be done before require_tie_mod is called */ |
67261566 |
1329 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
44a2ac75 |
1330 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
d2c93421 |
1331 | |
6cef1e77 |
1332 | break; |
cc4c2da6 |
1333 | case '-': |
44a2ac75 |
1334 | case '+': |
1335 | GvMULTI_on(gv); /* no used once warnings here */ |
1336 | { |
44a2ac75 |
1337 | AV* const av = GvAVn(gv); |
ad64d0ec |
1338 | SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL; |
44a2ac75 |
1339 | |
ad64d0ec |
1340 | sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0); |
1341 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
67261566 |
1342 | if (avc) |
44a2ac75 |
1343 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 |
1344 | SvREADONLY_on(av); |
67261566 |
1345 | |
1346 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
192b9cd1 |
1347 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
67261566 |
1348 | |
80305961 |
1349 | break; |
cc4c2da6 |
1350 | } |
1351 | case '*': |
cc4c2da6 |
1352 | case '#': |
9b387841 |
1353 | if (sv_type == SVt_PV) |
1354 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
1355 | "$%c is no longer supported", *name); |
8ae1fe26 |
1356 | break; |
cc4c2da6 |
1357 | case '|': |
c69033f2 |
1358 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 |
1359 | goto magicalize; |
1360 | |
b3ca2e83 |
1361 | case '\010': /* $^H */ |
1362 | { |
1363 | HV *const hv = GvHVn(gv); |
1364 | hv_magic(hv, NULL, PERL_MAGIC_hints); |
1365 | } |
1366 | goto magicalize; |
cc4c2da6 |
1367 | case '\023': /* $^S */ |
2fdbfb4d |
1368 | ro_magicalize: |
1369 | SvREADONLY_on(GvSVn(gv)); |
1370 | /* FALL THROUGH */ |
e69c155a |
1371 | case '0': |
cc4c2da6 |
1372 | case '1': |
1373 | case '2': |
1374 | case '3': |
1375 | case '4': |
1376 | case '5': |
1377 | case '6': |
1378 | case '7': |
1379 | case '8': |
1380 | case '9': |
cc4c2da6 |
1381 | case '[': |
1382 | case '^': |
1383 | case '~': |
1384 | case '=': |
1385 | case '%': |
1386 | case '.': |
1387 | case '(': |
1388 | case ')': |
1389 | case '<': |
1390 | case '>': |
cc4c2da6 |
1391 | case '\\': |
1392 | case '/': |
1393 | case '\001': /* $^A */ |
1394 | case '\003': /* $^C */ |
1395 | case '\004': /* $^D */ |
1396 | case '\005': /* $^E */ |
1397 | case '\006': /* $^F */ |
cc4c2da6 |
1398 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1399 | case '\016': /* $^N */ |
1400 | case '\017': /* $^O */ |
1401 | case '\020': /* $^P */ |
1402 | case '\024': /* $^T */ |
1403 | case '\027': /* $^W */ |
1404 | magicalize: |
ad64d0ec |
1405 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
cc4c2da6 |
1406 | break; |
e521374c |
1407 | |
cc4c2da6 |
1408 | case '\014': /* $^L */ |
76f68e9b |
1409 | sv_setpvs(GvSVn(gv),"\f"); |
c69033f2 |
1410 | PL_formfeed = GvSVn(gv); |
463ee0b2 |
1411 | break; |
cc4c2da6 |
1412 | case ';': |
76f68e9b |
1413 | sv_setpvs(GvSVn(gv),"\034"); |
463ee0b2 |
1414 | break; |
cc4c2da6 |
1415 | case ']': |
1416 | { |
c69033f2 |
1417 | SV * const sv = GvSVn(gv); |
d7aa5382 |
1418 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f |
1419 | upg_version(PL_patchlevel, TRUE); |
7d54d38e |
1420 | GvSV(gv) = vnumify(PL_patchlevel); |
1421 | SvREADONLY_on(GvSV(gv)); |
1422 | SvREFCNT_dec(sv); |
93a17b20 |
1423 | } |
1424 | break; |
cc4c2da6 |
1425 | case '\026': /* $^V */ |
1426 | { |
c69033f2 |
1427 | SV * const sv = GvSVn(gv); |
f9be5ac8 |
1428 | GvSV(gv) = new_version(PL_patchlevel); |
1429 | SvREADONLY_on(GvSV(gv)); |
1430 | SvREFCNT_dec(sv); |
16070b82 |
1431 | } |
1432 | break; |
cc4c2da6 |
1433 | } |
79072805 |
1434 | } |
93a17b20 |
1435 | return gv; |
79072805 |
1436 | } |
1437 | |
1438 | void |
35a4481c |
1439 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1440 | { |
35a4481c |
1441 | const char *name; |
7423f6db |
1442 | STRLEN namelen; |
35a4481c |
1443 | const HV * const hv = GvSTASH(gv); |
7918f24d |
1444 | |
1445 | PERL_ARGS_ASSERT_GV_FULLNAME4; |
1446 | |
43693395 |
1447 | if (!hv) { |
0c34ef67 |
1448 | SvOK_off(sv); |
43693395 |
1449 | return; |
1450 | } |
666ea192 |
1451 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 |
1452 | |
bfcb3514 |
1453 | name = HvNAME_get(hv); |
7423f6db |
1454 | if (name) { |
1455 | namelen = HvNAMELEN_get(hv); |
1456 | } else { |
e27ad1f2 |
1457 | name = "__ANON__"; |
7423f6db |
1458 | namelen = 8; |
1459 | } |
a0288114 |
1460 | |
e27ad1f2 |
1461 | if (keepmain || strNE(name, "main")) { |
7423f6db |
1462 | sv_catpvn(sv,name,namelen); |
396482e1 |
1463 | sv_catpvs(sv,"::"); |
43693395 |
1464 | } |
257984c0 |
1465 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 |
1466 | } |
1467 | |
1468 | void |
35a4481c |
1469 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1470 | { |
46c461b5 |
1471 | const GV * const egv = GvEGV(gv); |
7918f24d |
1472 | |
1473 | PERL_ARGS_ASSERT_GV_EFULLNAME4; |
1474 | |
46c461b5 |
1475 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 |
1476 | } |
1477 | |
79072805 |
1478 | void |
1146e912 |
1479 | Perl_gv_check(pTHX_ const HV *stash) |
79072805 |
1480 | { |
97aff369 |
1481 | dVAR; |
79072805 |
1482 | register I32 i; |
463ee0b2 |
1483 | |
7918f24d |
1484 | PERL_ARGS_ASSERT_GV_CHECK; |
1485 | |
8990e307 |
1486 | if (!HvARRAY(stash)) |
1487 | return; |
a0d0e21e |
1488 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 |
1489 | const HE *entry; |
dc437b57 |
1490 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 |
1491 | register GV *gv; |
1492 | HV *hv; |
dc437b57 |
1493 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
159b6efe |
1494 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e |
1495 | { |
19b6c847 |
1496 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1497 | gv_check(hv); /* nested package */ |
1498 | } |
dc437b57 |
1499 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 |
1500 | const char *file; |
159b6efe |
1501 | gv = MUTABLE_GV(HeVAL(entry)); |
55d729e4 |
1502 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1503 | continue; |
1d7c1841 |
1504 | file = GvFILE(gv); |
1d7c1841 |
1505 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1506 | #ifdef USE_ITHREADS |
dd374669 |
1507 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 |
1508 | #else |
9bde8eb0 |
1509 | CopFILEGV(PL_curcop) |
1510 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); |
1d7c1841 |
1511 | #endif |
9014280d |
1512 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 |
1513 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 |
1514 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 |
1515 | } |
79072805 |
1516 | } |
1517 | } |
1518 | } |
1519 | |
1520 | GV * |
e1ec3a88 |
1521 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 |
1522 | { |
97aff369 |
1523 | dVAR; |
7918f24d |
1524 | |
1525 | PERL_ARGS_ASSERT_NEWGVGEN; |
1526 | |
cea2e8a9 |
1527 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 |
1528 | GV_ADD, SVt_PVGV); |
79072805 |
1529 | } |
1530 | |
1531 | /* hopefully this is only called on local symbol table entries */ |
1532 | |
1533 | GP* |
864dbfa3 |
1534 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1535 | { |
97aff369 |
1536 | dVAR; |
1d7c1841 |
1537 | if (!gp) |
d4c19fe8 |
1538 | return NULL; |
79072805 |
1539 | gp->gp_refcnt++; |
44a8e56a |
1540 | if (gp->gp_cv) { |
1541 | if (gp->gp_cvgen) { |
e1a479c5 |
1542 | /* If the GP they asked for a reference to contains |
1543 | a method cache entry, clear it first, so that we |
1544 | don't infect them with our cached entry */ |
44a8e56a |
1545 | SvREFCNT_dec(gp->gp_cv); |
601f1833 |
1546 | gp->gp_cv = NULL; |
44a8e56a |
1547 | gp->gp_cvgen = 0; |
1548 | } |
44a8e56a |
1549 | } |
79072805 |
1550 | return gp; |
79072805 |
1551 | } |
1552 | |
1553 | void |
864dbfa3 |
1554 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1555 | { |
97aff369 |
1556 | dVAR; |
79072805 |
1557 | GP* gp; |
1558 | |
f7877b28 |
1559 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 |
1560 | return; |
f248d071 |
1561 | if (gp->gp_refcnt == 0) { |
9b387841 |
1562 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
1563 | "Attempt to free unreferenced glob pointers" |
1564 | pTHX__FORMAT pTHX__VALUE); |
79072805 |
1565 | return; |
1566 | } |
748a9306 |
1567 | if (--gp->gp_refcnt > 0) { |
1568 | if (gp->gp_egv == gv) |
1569 | gp->gp_egv = 0; |
dd38834b |
1570 | GvGP(gv) = 0; |
79072805 |
1571 | return; |
748a9306 |
1572 | } |
79072805 |
1573 | |
c9ce39a9 |
1574 | if (gp->gp_file_hek) |
1575 | unshare_hek(gp->gp_file_hek); |
c9da69fb |
1576 | SvREFCNT_dec(gp->gp_sv); |
1577 | SvREFCNT_dec(gp->gp_av); |
bfcb3514 |
1578 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1579 | Somehow gp->gp_hv can end up pointing at freed garbage. */ |
1580 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { |
bfcb3514 |
1581 | const char *hvname = HvNAME_get(gp->gp_hv); |
1582 | if (PL_stashcache && hvname) |
04fe65b0 |
1583 | (void)hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
7423f6db |
1584 | G_DISCARD); |
bfcb3514 |
1585 | SvREFCNT_dec(gp->gp_hv); |
13207a71 |
1586 | } |
c9da69fb |
1587 | SvREFCNT_dec(gp->gp_io); |
1588 | SvREFCNT_dec(gp->gp_cv); |
1589 | SvREFCNT_dec(gp->gp_form); |
748a9306 |
1590 | |
79072805 |
1591 | Safefree(gp); |
1592 | GvGP(gv) = 0; |
1593 | } |
1594 | |
d460ef45 |
1595 | int |
1596 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1597 | { |
53c1dcc0 |
1598 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1599 | PERL_UNUSED_ARG(sv); |
dd374669 |
1600 | |
7918f24d |
1601 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
1602 | |
d460ef45 |
1603 | if (amtp && AMT_AMAGIC(amtp)) { |
1604 | int i; |
1605 | for (i = 1; i < NofAMmeth; i++) { |
53c1dcc0 |
1606 | CV * const cv = amtp->table[i]; |
b37c2d43 |
1607 | if (cv) { |
ad64d0ec |
1608 | SvREFCNT_dec(MUTABLE_SV(cv)); |
601f1833 |
1609 | amtp->table[i] = NULL; |
d460ef45 |
1610 | } |
1611 | } |
1612 | } |
1613 | return 0; |
1614 | } |
1615 | |
a0d0e21e |
1616 | /* Updates and caches the CV's */ |
c3a9a790 |
1617 | /* Returns: |
1618 | * 1 on success and there is some overload |
1619 | * 0 if there is no overload |
1620 | * -1 if some error occurred and it couldn't croak |
1621 | */ |
a0d0e21e |
1622 | |
c3a9a790 |
1623 | int |
242f8760 |
1624 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e |
1625 | { |
97aff369 |
1626 | dVAR; |
ad64d0ec |
1627 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 |
1628 | AMT amt; |
9b439311 |
1629 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 |
1630 | U32 newgen; |
a0d0e21e |
1631 | |
7918f24d |
1632 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
1633 | |
9b439311 |
1634 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 |
1635 | if (mg) { |
1636 | const AMT * const amtp = (AMT*)mg->mg_ptr; |
1637 | if (amtp->was_ok_am == PL_amagic_generation |
e1a479c5 |
1638 | && amtp->was_ok_sub == newgen) { |
c3a9a790 |
1639 | return AMT_OVERLOADED(amtp) ? 1 : 0; |
14899595 |
1640 | } |
ad64d0ec |
1641 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 |
1642 | } |
a0d0e21e |
1643 | |
bfcb3514 |
1644 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e |
1645 | |
d460ef45 |
1646 | Zero(&amt,1,AMT); |
3280af22 |
1647 | amt.was_ok_am = PL_amagic_generation; |
e1a479c5 |
1648 | amt.was_ok_sub = newgen; |
a6006777 |
1649 | amt.fallback = AMGfallNO; |
1650 | amt.flags = 0; |
1651 | |
a6006777 |
1652 | { |
32251b26 |
1653 | int filled = 0, have_ovl = 0; |
1654 | int i, lim = 1; |
a6006777 |
1655 | |
22c35a8c |
1656 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1657 | |
89ffc314 |
1658 | /* Try to find via inheritance. */ |
53c1dcc0 |
1659 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1660 | SV * const sv = gv ? GvSV(gv) : NULL; |
1661 | CV* cv; |
89ffc314 |
1662 | |
1663 | if (!gv) |
32251b26 |
1664 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 |
1665 | #ifdef PERL_DONT_CREATE_GVSV |
1666 | else if (!sv) { |
6f207bd3 |
1667 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 |
1668 | } |
1669 | #endif |
89ffc314 |
1670 | else if (SvTRUE(sv)) |
1671 | amt.fallback=AMGfallYES; |
1672 | else if (SvOK(sv)) |
1673 | amt.fallback=AMGfallNEVER; |
a6006777 |
1674 | |
32251b26 |
1675 | for (i = 1; i < lim; i++) |
601f1833 |
1676 | amt.table[i] = NULL; |
32251b26 |
1677 | for (; i < NofAMmeth; i++) { |
6136c704 |
1678 | const char * const cooky = PL_AMG_names[i]; |
32251b26 |
1679 | /* Human-readable form, for debugging: */ |
6136c704 |
1680 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
d279ab82 |
1681 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 |
1682 | |
a0288114 |
1683 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1684 | cp, HvNAME_get(stash)) ); |
611c1e95 |
1685 | /* don't fill the cache while looking up! |
1686 | Creation of inheritance stubs in intermediate packages may |
1687 | conflict with the logic of runtime method substitution. |
1688 | Indeed, for inheritance A -> B -> C, if C overloads "+0", |
1689 | then we could have created stubs for "(+0" in A and C too. |
1690 | But if B overloads "bool", we may want to use it for |
1691 | numifying instead of C's "+0". */ |
1692 | if (i >= DESTROY_amg) |
1693 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); |
1694 | else /* Autoload taken care of below */ |
1695 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); |
46fc3d4c |
1696 | cv = 0; |
89ffc314 |
1697 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 |
1698 | const char *hvname; |
44a8e56a |
1699 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 |
1700 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 |
1701 | /* This is a hack to support autoloading..., while |
1702 | knowing *which* methods were declared as overloaded. */ |
44a8e56a |
1703 | /* GvSV contains the name of the method. */ |
6136c704 |
1704 | GV *ngv = NULL; |
c69033f2 |
1705 | SV *gvsv = GvSV(gv); |
a0288114 |
1706 | |
1707 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ |
1708 | "\" for overloaded \"%s\" in package \"%.256s\"\n", |
ca0270c4 |
1709 | (void*)GvSV(gv), cp, hvname) ); |
c69033f2 |
1710 | if (!gvsv || !SvPOK(gvsv) |
1711 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), |
dc848c6f |
1712 | FALSE))) |
1713 | { |
a0288114 |
1714 | /* Can be an import stub (created by "can"). */ |
242f8760 |
1715 | if (destructing) { |
c3a9a790 |
1716 | return -1; |
242f8760 |
1717 | } |
1718 | else { |
1719 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
1720 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1721 | "in package \"%.256s\"", |
1722 | (GvCVGEN(gv) ? "Stub found while resolving" |
1723 | : "Can't resolve"), |
1724 | name, cp, hvname); |
1725 | } |
44a8e56a |
1726 | } |
dc848c6f |
1727 | cv = GvCV(gv = ngv); |
44a8e56a |
1728 | } |
b464bac0 |
1729 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 |
1730 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a |
1731 | GvNAME(CvGV(cv))) ); |
1732 | filled = 1; |
32251b26 |
1733 | if (i < DESTROY_amg) |
1734 | have_ovl = 1; |
611c1e95 |
1735 | } else if (gv) { /* Autoloaded... */ |
ea726b52 |
1736 | cv = MUTABLE_CV(gv); |
611c1e95 |
1737 | filled = 1; |
44a8e56a |
1738 | } |
ea726b52 |
1739 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); |
a0d0e21e |
1740 | } |
a0d0e21e |
1741 | if (filled) { |
a6006777 |
1742 | AMT_AMAGIC_on(&amt); |
32251b26 |
1743 | if (have_ovl) |
1744 | AMT_OVERLOADED_on(&amt); |
ad64d0ec |
1745 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 |
1746 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1747 | return have_ovl; |
a0d0e21e |
1748 | } |
1749 | } |
a6006777 |
1750 | /* Here we have no table: */ |
9cbac4c7 |
1751 | /* no_table: */ |
a6006777 |
1752 | AMT_AMAGIC_off(&amt); |
ad64d0ec |
1753 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 |
1754 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 |
1755 | return 0; |
a0d0e21e |
1756 | } |
1757 | |
32251b26 |
1758 | |
1759 | CV* |
1760 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1761 | { |
97aff369 |
1762 | dVAR; |
3f8f4626 |
1763 | MAGIC *mg; |
32251b26 |
1764 | AMT *amtp; |
e1a479c5 |
1765 | U32 newgen; |
9b439311 |
1766 | struct mro_meta* stash_meta; |
32251b26 |
1767 | |
bfcb3514 |
1768 | if (!stash || !HvNAME_get(stash)) |
601f1833 |
1769 | return NULL; |
e1a479c5 |
1770 | |
9b439311 |
1771 | stash_meta = HvMROMETA(stash); |
1772 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
e1a479c5 |
1773 | |
ad64d0ec |
1774 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 |
1775 | if (!mg) { |
1776 | do_update: |
242f8760 |
1777 | /* If we're looking up a destructor to invoke, we must avoid |
1778 | * that Gv_AMupdate croaks, because we might be dying already */ |
c3a9a790 |
1779 | if (Gv_AMupdate(stash, id == DESTROY_amg) == -1) { |
242f8760 |
1780 | /* and if it didn't found a destructor, we fall back |
1781 | * to a simpler method that will only look for the |
1782 | * destructor instead of the whole magic */ |
1783 | if (id == DESTROY_amg) { |
1784 | GV * const gv = gv_fetchmethod(stash, "DESTROY"); |
1785 | if (gv) |
1786 | return GvCV(gv); |
1787 | } |
1788 | return NULL; |
1789 | } |
ad64d0ec |
1790 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 |
1791 | } |
a9fd4e40 |
1792 | assert(mg); |
32251b26 |
1793 | amtp = (AMT*)mg->mg_ptr; |
1794 | if ( amtp->was_ok_am != PL_amagic_generation |
e1a479c5 |
1795 | || amtp->was_ok_sub != newgen ) |
32251b26 |
1796 | goto do_update; |
3ad83ce7 |
1797 | if (AMT_AMAGIC(amtp)) { |
b7787f18 |
1798 | CV * const ret = amtp->table[id]; |
3ad83ce7 |
1799 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1800 | /* Passing it through may have resulted in a warning |
1801 | "Inherited AUTOLOAD for a non-method deprecated", since |
1802 | our caller is going through a function call, not a method call. |
1803 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ |
890ce7af |
1804 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 |
1805 | |
1806 | if (gv && GvCV(gv)) |
1807 | return GvCV(gv); |
1808 | } |
1809 | return ret; |
1810 | } |
a0288114 |
1811 | |
601f1833 |
1812 | return NULL; |
32251b26 |
1813 | } |
1814 | |
1815 | |
a0d0e21e |
1816 | SV* |
864dbfa3 |
1817 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1818 | { |
27da23d5 |
1819 | dVAR; |
b267980d |
1820 | MAGIC *mg; |
9c5ffd7c |
1821 | CV *cv=NULL; |
a0d0e21e |
1822 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1823 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 |
1824 | int off = 0, off1, lr = 0, notfound = 0; |
1825 | int postpr = 0, force_cpy = 0; |
1826 | int assign = AMGf_assign & flags; |
1827 | const int assignshift = assign ? 1 : 0; |
497b47a8 |
1828 | #ifdef DEBUGGING |
1829 | int fl=0; |
497b47a8 |
1830 | #endif |
25716404 |
1831 | HV* stash=NULL; |
7918f24d |
1832 | |
1833 | PERL_ARGS_ASSERT_AMAGIC_CALL; |
1834 | |
e46c382e |
1835 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
1836 | SV *lex_mask = Perl_refcounted_he_fetch(aTHX_ PL_curcop->cop_hints_hash, |
1837 | 0, "overloading", 11, 0, 0); |
1838 | |
1839 | if ( !lex_mask || !SvOK(lex_mask) ) |
1840 | /* overloading lexically disabled */ |
1841 | return NULL; |
1842 | else if ( lex_mask && SvPOK(lex_mask) ) { |
1843 | /* we have an entry in the hints hash, check if method has been |
1844 | * masked by overloading.pm */ |
d15cd831 |
1845 | STRLEN len; |
e46c382e |
1846 | const int offset = method / 8; |
d87d3eed |
1847 | const int bit = method % 8; |
e46c382e |
1848 | char *pv = SvPV(lex_mask, len); |
1849 | |
d15cd831 |
1850 | /* Bit set, so this overloading operator is disabled */ |
ed15e576 |
1851 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) |
e46c382e |
1852 | return NULL; |
1853 | } |
1854 | } |
1855 | |
a0d0e21e |
1856 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 |
1857 | && (stash = SvSTASH(SvRV(left))) |
ad64d0ec |
1858 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d |
1859 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1860 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 |
1861 | : NULL)) |
b267980d |
1862 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1863 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1864 | * usual method */ |
497b47a8 |
1865 | ( |
1866 | #ifdef DEBUGGING |
1867 | fl = 1, |
a0288114 |
1868 | #endif |
497b47a8 |
1869 | cv = cvp[off=method])))) { |
a0d0e21e |
1870 | lr = -1; /* Call method for left argument */ |
1871 | } else { |
1872 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1873 | int logic; |
1874 | |
1875 | /* look for substituted methods */ |
ee239bfe |
1876 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1877 | switch (method) { |
1878 | case inc_amg: |
ee239bfe |
1879 | force_cpy = 1; |
1880 | if ((cv = cvp[off=add_ass_amg]) |
1881 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1882 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1883 | } |
1884 | break; |
1885 | case dec_amg: |
ee239bfe |
1886 | force_cpy = 1; |
1887 | if ((cv = cvp[off = subtr_ass_amg]) |
1888 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1889 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1890 | } |
1891 | break; |
1892 | case bool__amg: |
1893 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1894 | break; |
1895 | case numer_amg: |
1896 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1897 | break; |
1898 | case string_amg: |
1899 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1900 | break; |
b7787f18 |
1901 | case not_amg: |
1902 | (void)((cv = cvp[off=bool__amg]) |
1903 | || (cv = cvp[off=numer_amg]) |
1904 | || (cv = cvp[off=string_amg])); |
2ab54efd |
1905 | if (cv) |
1906 | postpr = 1; |
b7787f18 |
1907 | break; |
748a9306 |
1908 | case copy_amg: |
1909 | { |
76e3520e |
1910 | /* |
1911 | * SV* ref causes confusion with the interpreter variable of |
1912 | * the same name |
1913 | */ |
890ce7af |
1914 | SV* const tmpRef=SvRV(left); |
76e3520e |
1915 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1916 | /* |
1917 | * Just to be extra cautious. Maybe in some |
1918 | * additional cases sv_setsv is safe, too. |
1919 | */ |
890ce7af |
1920 | SV* const newref = newSVsv(tmpRef); |
748a9306 |
1921 | SvOBJECT_on(newref); |
96d4b0ee |
1922 | /* As a bit of a source compatibility hack, SvAMAGIC() and |
1923 | friends dereference an RV, to behave the same was as when |
1924 | overloading was stored on the reference, not the referant. |
1925 | Hence we can't use SvAMAGIC_on() |
1926 | */ |
1927 | SvFLAGS(newref) |= SVf_AMAGIC; |
85fbaab2 |
1928 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); |
748a9306 |
1929 | return newref; |
1930 | } |
1931 | } |
1932 | break; |
a0d0e21e |
1933 | case abs_amg: |
b267980d |
1934 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1935 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af |
1936 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1937 | if (off1==lt_amg) { |
890ce7af |
1938 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1939 | lt_amg,AMGf_noright); |
1940 | logic = SvTRUE(lessp); |
1941 | } else { |
890ce7af |
1942 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1943 | ncmp_amg,AMGf_noright); |
1944 | logic = (SvNV(lessp) < 0); |
1945 | } |
1946 | if (logic) { |
1947 | if (off==subtr_amg) { |
1948 | right = left; |
748a9306 |
1949 | left = nullsv; |
a0d0e21e |
1950 | lr = 1; |
1951 | } |
1952 | } else { |
1953 | return left; |
1954 | } |
1955 | } |
1956 | break; |
1957 | case neg_amg: |
155aba94 |
1958 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1959 | right = left; |
1960 | left = sv_2mortal(newSViv(0)); |
1961 | lr = 1; |
1962 | } |
1963 | break; |
f216259d |
1964 | case int_amg: |
f5284f61 |
1965 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
c4c7412c |
1966 | case ftest_amg: /* XXXX Eventually should do to_gv. */ |
d4b87e75 |
1967 | case regexp_amg: |
b267980d |
1968 | /* FAIL safe */ |
1969 | return NULL; /* Delegate operation to standard mechanisms. */ |
1970 | break; |
f5284f61 |
1971 | case to_sv_amg: |
1972 | case to_av_amg: |
1973 | case to_hv_amg: |
1974 | case to_gv_amg: |
1975 | case to_cv_amg: |
1976 | /* FAIL safe */ |
b267980d |
1977 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1978 | break; |
a0d0e21e |
1979 | default: |
1980 | goto not_found; |
1981 | } |
1982 | if (!cv) goto not_found; |
1983 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
25716404 |
1984 | && (stash = SvSTASH(SvRV(right))) |
ad64d0ec |
1985 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d |
1986 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1987 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 |
1988 | : NULL)) |
a0d0e21e |
1989 | && (cv = cvp[off=method])) { /* Method for right |
1990 | * argument found */ |
1991 | lr=1; |
b267980d |
1992 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1993 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1994 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1995 | && !(flags & AMGf_unary)) { |
1996 | /* We look for substitution for |
1997 | * comparison operations and |
fc36a67e |
1998 | * concatenation */ |
a0d0e21e |
1999 | if (method==concat_amg || method==concat_ass_amg |
2000 | || method==repeat_amg || method==repeat_ass_amg) { |
2001 | return NULL; /* Delegate operation to string conversion */ |
2002 | } |
2003 | off = -1; |
2004 | switch (method) { |
2005 | case lt_amg: |
2006 | case le_amg: |
2007 | case gt_amg: |
2008 | case ge_amg: |
2009 | case eq_amg: |
2010 | case ne_amg: |
2ab54efd |
2011 | off = ncmp_amg; |
2012 | break; |
a0d0e21e |
2013 | case slt_amg: |
2014 | case sle_amg: |
2015 | case sgt_amg: |
2016 | case sge_amg: |
2017 | case seq_amg: |
2018 | case sne_amg: |
2ab54efd |
2019 | off = scmp_amg; |
2020 | break; |
a0d0e21e |
2021 | } |
2ab54efd |
2022 | if ((off != -1) && (cv = cvp[off])) |
2023 | postpr = 1; |
2024 | else |
2025 | goto not_found; |
a0d0e21e |
2026 | } else { |
a6006777 |
2027 | not_found: /* No method found, either report or croak */ |
b267980d |
2028 | switch (method) { |
2029 | case to_sv_amg: |
2030 | case to_av_amg: |
2031 | case to_hv_amg: |
2032 | case to_gv_amg: |
2033 | case to_cv_amg: |
2034 | /* FAIL safe */ |
2035 | return left; /* Delegate operation to standard mechanisms. */ |
2036 | break; |
2037 | } |
a0d0e21e |
2038 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
2039 | notfound = 1; lr = -1; |
2040 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
2041 | notfound = 1; lr = 1; |
4cc0ca18 |
2042 | } else if ((amtp && amtp->fallback >= AMGfallYES) && !DEBUG_o_TEST) { |
2043 | /* Skip generating the "no method found" message. */ |
2044 | return NULL; |
a0d0e21e |
2045 | } else { |
46fc3d4c |
2046 | SV *msg; |
774d564b |
2047 | if (off==-1) off=method; |
b267980d |
2048 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 |
2049 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 |
2050 | AMG_id2name(method + assignshift), |
e7ea3e70 |
2051 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
2052 | SvAMAGIC(left)? |
a0d0e21e |
2053 | "in overloaded package ": |
2054 | "has no overloaded magic", |
b267980d |
2055 | SvAMAGIC(left)? |
bfcb3514 |
2056 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e |
2057 | "", |
b267980d |
2058 | SvAMAGIC(right)? |
e7ea3e70 |
2059 | ",\n\tright argument in overloaded package ": |
b267980d |
2060 | (flags & AMGf_unary |
e7ea3e70 |
2061 | ? "" |
2062 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
2063 | SvAMAGIC(right)? |
bfcb3514 |
2064 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c |
2065 | "")); |
a0d0e21e |
2066 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 |
2067 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e |
2068 | } else { |
be2597df |
2069 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e |
2070 | } |
2071 | return NULL; |
2072 | } |
ee239bfe |
2073 | force_cpy = force_cpy || assign; |
a0d0e21e |
2074 | } |
2075 | } |
497b47a8 |
2076 | #ifdef DEBUGGING |
a0d0e21e |
2077 | if (!notfound) { |
497b47a8 |
2078 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 |
2079 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 |
2080 | AMG_id2name(off), |
2081 | method+assignshift==off? "" : |
a0288114 |
2082 | " (initially \"", |
497b47a8 |
2083 | method+assignshift==off? "" : |
2084 | AMG_id2name(method+assignshift), |
a0288114 |
2085 | method+assignshift==off? "" : "\")", |
497b47a8 |
2086 | flags & AMGf_unary? "" : |
2087 | lr==1 ? " for right argument": " for left argument", |
2088 | flags & AMGf_unary? " for argument" : "", |
bfcb3514 |
2089 | stash ? HvNAME_get(stash) : "null", |
497b47a8 |
2090 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
2091 | } |
497b47a8 |
2092 | #endif |
748a9306 |
2093 | /* Since we use shallow copy during assignment, we need |
2094 | * to dublicate the contents, probably calling user-supplied |
2095 | * version of copy operator |
2096 | */ |
ee239bfe |
2097 | /* We need to copy in following cases: |
2098 | * a) Assignment form was called. |
2099 | * assignshift==1, assign==T, method + 1 == off |
2100 | * b) Increment or decrement, called directly. |
2101 | * assignshift==0, assign==0, method + 0 == off |
2102 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
2103 | * assignshift==0, assign==T, |
ee239bfe |
2104 | * force_cpy == T |
2105 | * d) Increment or decrement, translated to nomethod. |
b267980d |
2106 | * assignshift==0, assign==0, |
ee239bfe |
2107 | * force_cpy == T |
2108 | * e) Assignment form translated to nomethod. |
2109 | * assignshift==1, assign==T, method + 1 != off |
2110 | * force_cpy == T |
2111 | */ |
2112 | /* off is method, method+assignshift, or a result of opcode substitution. |
2113 | * In the latter case assignshift==0, so only notfound case is important. |
2114 | */ |
2115 | if (( (method + assignshift == off) |
2116 | && (assign || (method == inc_amg) || (method == dec_amg))) |
2117 | || force_cpy) |
2118 | RvDEEPCP(left); |
a0d0e21e |
2119 | { |
2120 | dSP; |
2121 | BINOP myop; |
2122 | SV* res; |
b7787f18 |
2123 | const bool oldcatch = CATCH_GET; |
a0d0e21e |
2124 | |
54310121 |
2125 | CATCH_SET(TRUE); |
a0d0e21e |
2126 | Zero(&myop, 1, BINOP); |
2127 | myop.op_last = (OP *) &myop; |
b37c2d43 |
2128 | myop.op_next = NULL; |
54310121 |
2129 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
2130 | |
e788e7d3 |
2131 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
2132 | ENTER; |
462e5cf6 |
2133 | SAVEOP(); |
533c011a |
2134 | PL_op = (OP *) &myop; |
3280af22 |
2135 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
2136 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
2137 | PUTBACK; |
cea2e8a9 |
2138 | pp_pushmark(); |
a0d0e21e |
2139 | |
924508f0 |
2140 | EXTEND(SP, notfound + 5); |
a0d0e21e |
2141 | PUSHs(lr>0? right: left); |
2142 | PUSHs(lr>0? left: right); |
3280af22 |
2143 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
2144 | if (notfound) { |
59cd0e26 |
2145 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
2146 | AMG_id2namelen(method + assignshift), SVs_TEMP)); |
a0d0e21e |
2147 | } |
ad64d0ec |
2148 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e |
2149 | PUTBACK; |
2150 | |
139d0ce6 |
2151 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 |
2152 | CALLRUNOPS(aTHX); |
a0d0e21e |
2153 | LEAVE; |
2154 | SPAGAIN; |
2155 | |
2156 | res=POPs; |
ebafeae7 |
2157 | PUTBACK; |
d3acc0f7 |
2158 | POPSTACK; |
54310121 |
2159 | CATCH_SET(oldcatch); |
a0d0e21e |
2160 | |
a0d0e21e |
2161 | if (postpr) { |
b7787f18 |
2162 | int ans; |
a0d0e21e |
2163 | switch (method) { |
2164 | case le_amg: |
2165 | case sle_amg: |
2166 | ans=SvIV(res)<=0; break; |
2167 | case lt_amg: |
2168 | case slt_amg: |
2169 | ans=SvIV(res)<0; break; |
2170 | case ge_amg: |
2171 | case sge_amg: |
2172 | ans=SvIV(res)>=0; break; |
2173 | case gt_amg: |
2174 | case sgt_amg: |
2175 | ans=SvIV(res)>0; break; |
2176 | case eq_amg: |
2177 | case seq_amg: |
2178 | ans=SvIV(res)==0; break; |
2179 | case ne_amg: |
2180 | case sne_amg: |
2181 | ans=SvIV(res)!=0; break; |
2182 | case inc_amg: |
2183 | case dec_amg: |
bbce6d69 |
2184 | SvSetSV(left,res); return left; |
dc437b57 |
2185 | case not_amg: |
fe7ac86a |
2186 | ans=!SvTRUE(res); break; |
b7787f18 |
2187 | default: |
2188 | ans=0; break; |
a0d0e21e |
2189 | } |
54310121 |
2190 | return boolSV(ans); |
748a9306 |
2191 | } else if (method==copy_amg) { |
2192 | if (!SvROK(res)) { |
cea2e8a9 |
2193 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
2194 | } |
2195 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
2196 | } else { |
2197 | return res; |
2198 | } |
2199 | } |
2200 | } |
c9d5ac95 |
2201 | |
2202 | /* |
7fc63493 |
2203 | =for apidoc is_gv_magical_sv |
c9d5ac95 |
2204 | |
2205 | Returns C<TRUE> if given the name of a magical GV. |
2206 | |
2207 | Currently only useful internally when determining if a GV should be |
2208 | created even in rvalue contexts. |
2209 | |
2210 | C<flags> is not used at present but available for future extension to |
2211 | allow selecting particular classes of magical variable. |
2212 | |
b9b0e72c |
2213 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
2214 | This assumption is met by all callers within the perl core, which all pass |
2215 | pointers returned by SvPV. |
2216 | |
c9d5ac95 |
2217 | =cut |
2218 | */ |
9d8f40c4 |
2219 | |
c9d5ac95 |
2220 | bool |
9d8f40c4 |
2221 | Perl_is_gv_magical_sv(pTHX_ SV *const name_sv, U32 flags) |
c9d5ac95 |
2222 | { |
9d8f40c4 |
2223 | STRLEN len; |
2224 | const char *const name = SvPV_const(name_sv, len); |
9d4ba2ae |
2225 | |
9d8f40c4 |
2226 | PERL_UNUSED_ARG(flags); |
2227 | PERL_ARGS_ASSERT_IS_GV_MAGICAL_SV; |
7918f24d |
2228 | |
b9b0e72c |
2229 | if (len > 1) { |
b464bac0 |
2230 | const char * const name1 = name + 1; |
b9b0e72c |
2231 | switch (*name) { |
2232 | case 'I': |
f2df7081 |
2233 | if (len == 3 && name[1] == 'S' && name[2] == 'A') |
b9b0e72c |
2234 | goto yes; |
2235 | break; |
2236 | case 'O': |
9431620d |
2237 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c |
2238 | goto yes; |
2239 | break; |
2240 | case 'S': |
9431620d |
2241 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c |
2242 | goto yes; |
2243 | break; |
2244 | /* Using ${^...} variables is likely to be sufficiently rare that |
2245 | it seems sensible to avoid the space hit of also checking the |
2246 | length. */ |
2247 | case '\017': /* ${^OPEN} */ |
9431620d |
2248 | if (strEQ(name1, "PEN")) |
b9b0e72c |
2249 | goto yes; |
2250 | break; |
2251 | case '\024': /* ${^TAINT} */ |
9431620d |
2252 | if (strEQ(name1, "AINT")) |
b9b0e72c |
2253 | goto yes; |
2254 | break; |
2255 | case '\025': /* ${^UNICODE} */ |
9431620d |
2256 | if (strEQ(name1, "NICODE")) |
b9b0e72c |
2257 | goto yes; |
a0288114 |
2258 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 |
2259 | goto yes; |
b9b0e72c |
2260 | break; |
2261 | case '\027': /* ${^WARNING_BITS} */ |
9431620d |
2262 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c |
2263 | goto yes; |
2264 | break; |
2265 | case '1': |
2266 | case '2': |
2267 | case '3': |
2268 | case '4': |
2269 | case '5': |
2270 | case '6': |
2271 | case '7': |
2272 | case '8': |
2273 | case '9': |
c9d5ac95 |
2274 | { |
7fc63493 |
2275 | const char *end = name + len; |
c9d5ac95 |
2276 | while (--end > name) { |
2277 | if (!isDIGIT(*end)) |
2278 | return FALSE; |
2279 | } |
b9b0e72c |
2280 | goto yes; |
2281 | } |
2282 | } |
2283 | } else { |
2284 | /* Because we're already assuming that name is NUL terminated |
2285 | below, we can treat an empty name as "\0" */ |
2286 | switch (*name) { |
2287 | case '&': |
2288 | case '`': |
2289 | case '\'': |
2290 | case ':': |
2291 | case '?': |
2292 | case '!': |
2293 | case '-': |
2294 | case '#': |
2295 | case '[': |
2296 | case '^': |
2297 | case '~': |
2298 | case '=': |
2299 | case '%': |
2300 | case '.': |
2301 | case '(': |
2302 | case ')': |
2303 | case '<': |
2304 | case '>': |
b9b0e72c |
2305 | case '\\': |
2306 | case '/': |
2307 | case '|': |
2308 | case '+': |
2309 | case ';': |
2310 | case ']': |
2311 | case '\001': /* $^A */ |
2312 | case '\003': /* $^C */ |
2313 | case '\004': /* $^D */ |
2314 | case '\005': /* $^E */ |
2315 | case '\006': /* $^F */ |
2316 | case '\010': /* $^H */ |
2317 | case '\011': /* $^I, NOT \t in EBCDIC */ |
2318 | case '\014': /* $^L */ |
2319 | case '\016': /* $^N */ |
2320 | case '\017': /* $^O */ |
2321 | case '\020': /* $^P */ |
2322 | case '\023': /* $^S */ |
2323 | case '\024': /* $^T */ |
2324 | case '\026': /* $^V */ |
2325 | case '\027': /* $^W */ |
2326 | case '1': |
2327 | case '2': |
2328 | case '3': |
2329 | case '4': |
2330 | case '5': |
2331 | case '6': |
2332 | case '7': |
2333 | case '8': |
2334 | case '9': |
2335 | yes: |
2336 | return TRUE; |
2337 | default: |
2338 | break; |
c9d5ac95 |
2339 | } |
c9d5ac95 |
2340 | } |
2341 | return FALSE; |
2342 | } |
66610fdd |
2343 | |
f5c1e807 |
2344 | void |
2345 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) |
2346 | { |
2347 | dVAR; |
acda4c6a |
2348 | U32 hash; |
f5c1e807 |
2349 | |
7918f24d |
2350 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 |
2351 | PERL_UNUSED_ARG(flags); |
2352 | |
acda4c6a |
2353 | if (len > I32_MAX) |
2354 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); |
2355 | |
ae8cc45f |
2356 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2357 | unshare_hek(GvNAME_HEK(gv)); |
2358 | } |
2359 | |
acda4c6a |
2360 | PERL_HASH(hash, name, len); |
9f616d01 |
2361 | GvNAME_HEK(gv) = share_hek(name, len, hash); |
f5c1e807 |
2362 | } |
2363 | |
66610fdd |
2364 | /* |
f7461760 |
2365 | =for apidoc gv_try_downgrade |
2366 | |
2367 | If C<gv> is a typeglob containing only a constant sub, and is only |
2368 | referenced from its package, and both the typeglob and the sub are |
2369 | sufficiently ordinary, replace the typeglob (in the package) with a |
2370 | placeholder that more compactly represents the same thing. This is meant |
2371 | to be used when a placeholder has been upgraded, most likely because |
2372 | something wanted to look at a proper code object, and it has turned out |
2373 | to be a constant sub to which a proper reference is no longer required. |
2374 | |
2375 | =cut |
2376 | */ |
2377 | |
2378 | void |
2379 | Perl_gv_try_downgrade(pTHX_ GV *gv) |
2380 | { |
2381 | HV *stash; |
2382 | CV *cv; |
2383 | HEK *namehek; |
2384 | SV **gvp; |
2385 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; |
2386 | if (SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
2387 | !SvOBJECT(gv) && !SvMAGICAL(gv) && !SvREADONLY(gv) && |
2388 | isGV_with_GP(gv) && GvGP(gv) && |
2389 | GvMULTI(gv) && !GvINTRO(gv) && GvREFCNT(gv) == 1 && |
2390 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && |
2391 | GvEGV(gv) == gv && (stash = GvSTASH(gv)) && (cv = GvCV(gv)) && |
2392 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
2393 | CvSTASH(cv) == stash && CvGV(cv) == gv && |
2394 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && |
2395 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && |
2396 | (namehek = GvNAME_HEK(gv)) && |
2397 | (gvp = hv_fetch(stash, HEK_KEY(namehek), |
2398 | HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) && |
2399 | *gvp == (SV*)gv) { |
2400 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); |
2401 | SvREFCNT(gv) = 0; |
2402 | sv_clear((SV*)gv); |
2403 | SvREFCNT(gv) = 1; |
2404 | SvFLAGS(gv) = SVt_IV|SVf_ROK; |
2405 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - |
2406 | STRUCT_OFFSET(XPVIV, xiv_iv)); |
2407 | SvRV_set(gv, value); |
2408 | } |
2409 | } |
2410 | |
2411 | /* |
66610fdd |
2412 | * Local variables: |
2413 | * c-indentation-style: bsd |
2414 | * c-basic-offset: 4 |
2415 | * indent-tabs-mode: t |
2416 | * End: |
2417 | * |
37442d52 |
2418 | * ex: set ts=8 sts=4 sw=4 noet: |
2419 | */ |