Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
4bb101f2 |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
fdf8c088 |
4 | * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others |
79072805 |
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 |
13 | * of your inquisitiveness, I shall spend all the rest of my days answering |
14 | * you. What more do you want to know?' |
15 | * 'The names of all the stars, and of all living things, and the whole |
16 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' |
17 | * laughed Pippin. |
79072805 |
18 | */ |
19 | |
ccfc67b7 |
20 | /* |
21 | =head1 GV Functions |
166f8a29 |
22 | |
23 | A GV is a structure which corresponds to to a Perl typeglob, ie *foo. |
24 | It is a structure that holds a pointer to a scalar, an array, a hash etc, |
25 | corresponding to $foo, @foo, %foo. |
26 | |
27 | GVs are usually found as values in stashes (symbol table hashes) where |
28 | Perl stores its global variables. |
29 | |
30 | =cut |
ccfc67b7 |
31 | */ |
32 | |
79072805 |
33 | #include "EXTERN.h" |
864dbfa3 |
34 | #define PERL_IN_GV_C |
79072805 |
35 | #include "perl.h" |
36 | |
f54cb97a |
37 | static const char S_autoload[] = "AUTOLOAD"; |
38 | static const STRLEN S_autolen = sizeof(S_autoload)-1; |
5c7983e5 |
39 | |
c69033f2 |
40 | |
41 | #ifdef PERL_DONT_CREATE_GVSV |
42 | GV * |
43 | Perl_gv_SVadd(pTHX_ GV *gv) |
44 | { |
45 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
46 | Perl_croak(aTHX_ "Bad symbol for scalar"); |
47 | if (!GvSV(gv)) |
561b68a9 |
48 | GvSV(gv) = newSV(0); |
c69033f2 |
49 | return gv; |
50 | } |
51 | #endif |
52 | |
79072805 |
53 | GV * |
864dbfa3 |
54 | Perl_gv_AVadd(pTHX_ register GV *gv) |
79072805 |
55 | { |
a0d0e21e |
56 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
57 | Perl_croak(aTHX_ "Bad symbol for array"); |
79072805 |
58 | if (!GvAV(gv)) |
59 | GvAV(gv) = newAV(); |
60 | return gv; |
61 | } |
62 | |
63 | GV * |
864dbfa3 |
64 | Perl_gv_HVadd(pTHX_ register GV *gv) |
79072805 |
65 | { |
a0d0e21e |
66 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
67 | Perl_croak(aTHX_ "Bad symbol for hash"); |
79072805 |
68 | if (!GvHV(gv)) |
463ee0b2 |
69 | GvHV(gv) = newHV(); |
79072805 |
70 | return gv; |
71 | } |
72 | |
73 | GV * |
864dbfa3 |
74 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e |
75 | { |
97aff369 |
76 | dVAR; |
8b5be85c |
77 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) { |
78 | |
79 | /* |
80 | * if it walks like a dirhandle, then let's assume that |
81 | * this is a dirhandle. |
82 | */ |
b37c2d43 |
83 | const char * const fh = |
666ea192 |
84 | PL_op->op_type == OP_READDIR || |
85 | PL_op->op_type == OP_TELLDIR || |
86 | PL_op->op_type == OP_SEEKDIR || |
87 | PL_op->op_type == OP_REWINDDIR || |
88 | PL_op->op_type == OP_CLOSEDIR ? |
89 | "dirhandle" : "filehandle"; |
8b5be85c |
90 | Perl_croak(aTHX_ "Bad symbol for %s", fh); |
91 | } |
92 | |
5bd07a3d |
93 | if (!GvIOp(gv)) { |
7fb37951 |
94 | #ifdef GV_UNIQUE_CHECK |
95 | if (GvUNIQUE(gv)) { |
96 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); |
5bd07a3d |
97 | } |
98 | #endif |
a0d0e21e |
99 | GvIOp(gv) = newIO(); |
5bd07a3d |
100 | } |
a0d0e21e |
101 | return gv; |
102 | } |
103 | |
104 | GV * |
864dbfa3 |
105 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
106 | { |
d9095cec |
107 | return gv_fetchfile_flags(name, strlen(name), 0); |
108 | } |
109 | |
110 | GV * |
111 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, |
112 | const U32 flags) |
113 | { |
97aff369 |
114 | dVAR; |
4116122e |
115 | char smallbuf[128]; |
53d95988 |
116 | char *tmpbuf; |
d9095cec |
117 | const STRLEN tmplen = namelen + 2; |
79072805 |
118 | GV *gv; |
119 | |
d9095cec |
120 | PERL_UNUSED_ARG(flags); |
121 | |
1d7c1841 |
122 | if (!PL_defstash) |
a0714e2c |
123 | return NULL; |
1d7c1841 |
124 | |
d9095cec |
125 | if (tmplen <= sizeof smallbuf) |
53d95988 |
126 | tmpbuf = smallbuf; |
127 | else |
798b63bc |
128 | Newx(tmpbuf, tmplen, char); |
0ac0412a |
129 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 |
130 | tmpbuf[0] = '_'; |
131 | tmpbuf[1] = '<'; |
d9095cec |
132 | memcpy(tmpbuf + 2, name, namelen); |
133 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
134 | if (!isGV(gv)) { |
d9095cec |
135 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 |
136 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec |
137 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 |
138 | #else |
d9095cec |
139 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 |
140 | #endif |
1d7c1841 |
141 | if (PERLDB_LINE) |
a0714e2c |
142 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); |
1d7c1841 |
143 | } |
53d95988 |
144 | if (tmpbuf != smallbuf) |
145 | Safefree(tmpbuf); |
79072805 |
146 | return gv; |
147 | } |
148 | |
62d55b22 |
149 | /* |
150 | =for apidoc gv_const_sv |
151 | |
152 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for |
153 | inlining, or C<gv> is a placeholder reference that would be promoted to such |
154 | a typeglob, then returns the value returned by the sub. Otherwise, returns |
155 | NULL. |
156 | |
157 | =cut |
158 | */ |
159 | |
160 | SV * |
161 | Perl_gv_const_sv(pTHX_ GV *gv) |
162 | { |
163 | if (SvTYPE(gv) == SVt_PVGV) |
164 | return cv_const_sv(GvCVu(gv)); |
165 | return SvROK(gv) ? SvRV(gv) : NULL; |
166 | } |
167 | |
12816592 |
168 | GP * |
169 | Perl_newGP(pTHX_ GV *const gv) |
170 | { |
171 | GP *gp; |
1df5f7c1 |
172 | const char *const file |
173 | = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : ""; |
f4890806 |
174 | STRLEN len = strlen(file); |
175 | U32 hash; |
176 | |
177 | PERL_HASH(hash, file, len); |
178 | |
12816592 |
179 | Newxz(gp, 1, GP); |
180 | |
181 | #ifndef PERL_DONT_CREATE_GVSV |
b5c2dcb8 |
182 | gp->gp_sv = newSV(0); |
12816592 |
183 | #endif |
184 | |
1df5f7c1 |
185 | gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0; |
12816592 |
186 | /* XXX Ideally this cast would be replaced with a change to const char* |
187 | in the struct. */ |
f4890806 |
188 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 |
189 | gp->gp_egv = gv; |
190 | gp->gp_refcnt = 1; |
191 | |
192 | return gp; |
193 | } |
194 | |
463ee0b2 |
195 | void |
864dbfa3 |
196 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
197 | { |
27da23d5 |
198 | dVAR; |
3b6733bf |
199 | const U32 old_type = SvTYPE(gv); |
200 | const bool doproto = old_type > SVt_NULL; |
b15aece3 |
201 | const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL; |
756cb477 |
202 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 |
203 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 |
204 | |
205 | assert (!(proto && has_constant)); |
206 | |
207 | if (has_constant) { |
5c1f4d79 |
208 | /* The constant has to be a simple scalar type. */ |
209 | switch (SvTYPE(has_constant)) { |
210 | case SVt_PVAV: |
211 | case SVt_PVHV: |
212 | case SVt_PVCV: |
213 | case SVt_PVFM: |
214 | case SVt_PVIO: |
215 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", |
216 | sv_reftype(has_constant, 0)); |
42d0e0b7 |
217 | default: NOOP; |
5c1f4d79 |
218 | } |
756cb477 |
219 | SvRV_set(gv, NULL); |
220 | SvROK_off(gv); |
221 | } |
463ee0b2 |
222 | |
3b6733bf |
223 | |
224 | if (old_type < SVt_PVGV) { |
225 | if (old_type >= SVt_PV) |
226 | SvCUR_set(gv, 0); |
227 | sv_upgrade((SV*)gv, SVt_PVGV); |
228 | } |
55d729e4 |
229 | if (SvLEN(gv)) { |
230 | if (proto) { |
f880fe2f |
231 | SvPV_set(gv, NULL); |
b162af07 |
232 | SvLEN_set(gv, 0); |
55d729e4 |
233 | SvPOK_off(gv); |
234 | } else |
94010e71 |
235 | Safefree(SvPVX_mutable(gv)); |
55d729e4 |
236 | } |
2e5b91de |
237 | SvIOK_off(gv); |
238 | isGV_with_GP_on(gv); |
12816592 |
239 | |
240 | GvGP(gv) = Perl_newGP(aTHX_ gv); |
e15faf7d |
241 | GvSTASH(gv) = stash; |
242 | if (stash) |
243 | Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv); |
ae8cc45f |
244 | gv_name_set(gv, name, len, GV_ADD); |
23ad5bf5 |
245 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
246 | GvMULTI_on(gv); |
55d729e4 |
247 | if (doproto) { /* Replicate part of newSUB here. */ |
248 | ENTER; |
756cb477 |
249 | if (has_constant) { |
250 | /* newCONSTSUB takes ownership of the reference from us. */ |
251 | GvCV(gv) = newCONSTSUB(stash, name, has_constant); |
1ccdb730 |
252 | /* If this reference was a copy of another, then the subroutine |
253 | must have been "imported", by a Perl space assignment to a GV |
254 | from a reference to CV. */ |
255 | if (exported_constant) |
256 | GvIMPORTED_CV_on(gv); |
756cb477 |
257 | } else { |
756cb477 |
258 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
259 | GvCV(gv) = PL_compcv; |
260 | } |
55d729e4 |
261 | LEAVE; |
262 | |
e1a479c5 |
263 | mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */ |
65c50114 |
264 | CvGV(GvCV(gv)) = gv; |
e0d088d0 |
265 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 |
266 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
267 | if (proto) { |
268 | sv_setpv((SV*)GvCV(gv), proto); |
269 | Safefree(proto); |
270 | } |
271 | } |
463ee0b2 |
272 | } |
273 | |
76e3520e |
274 | STATIC void |
cea2e8a9 |
275 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
276 | { |
277 | switch (sv_type) { |
278 | case SVt_PVIO: |
279 | (void)GvIOn(gv); |
280 | break; |
281 | case SVt_PVAV: |
282 | (void)GvAVn(gv); |
283 | break; |
284 | case SVt_PVHV: |
285 | (void)GvHVn(gv); |
286 | break; |
c69033f2 |
287 | #ifdef PERL_DONT_CREATE_GVSV |
288 | case SVt_NULL: |
289 | case SVt_PVCV: |
290 | case SVt_PVFM: |
e654831b |
291 | case SVt_PVGV: |
c69033f2 |
292 | break; |
293 | default: |
dbdce04c |
294 | if(GvSVn(gv)) { |
295 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 |
296 | If we just cast GvSVn(gv) to void, it ignores evaluating it for |
297 | its side effect */ |
298 | } |
c69033f2 |
299 | #endif |
a0d0e21e |
300 | } |
301 | } |
302 | |
954c1994 |
303 | /* |
304 | =for apidoc gv_fetchmeth |
305 | |
306 | Returns the glob with the given C<name> and a defined subroutine or |
307 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
308 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
309 | |
310 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
311 | side-effect creates a glob with the given C<name> in the given C<stash> |
312 | which in the case of success contains an alias for the subroutine, and sets |
e1a479c5 |
313 | up caching info for this glob. |
954c1994 |
314 | |
315 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
316 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
317 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
318 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
319 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
320 | |
321 | =cut |
322 | */ |
323 | |
e1a479c5 |
324 | /* NOTE: No support for tied ISA */ |
325 | |
79072805 |
326 | GV * |
864dbfa3 |
327 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
328 | { |
97aff369 |
329 | dVAR; |
463ee0b2 |
330 | GV** gvp; |
e1a479c5 |
331 | AV* linear_av; |
332 | SV** linear_svp; |
333 | SV* linear_sv; |
334 | HV* cstash; |
335 | GV* candidate = NULL; |
336 | CV* cand_cv = NULL; |
337 | CV* old_cv; |
338 | GV* topgv = NULL; |
bfcb3514 |
339 | const char *hvname; |
e1a479c5 |
340 | I32 create = (level >= 0) ? 1 : 0; |
341 | I32 items; |
342 | STRLEN packlen; |
343 | U32 topgen_cmp; |
a0d0e21e |
344 | |
af09ea45 |
345 | /* UNIVERSAL methods should be callable without a stash */ |
346 | if (!stash) { |
e1a479c5 |
347 | create = 0; /* probably appropriate */ |
da51bb9b |
348 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 |
349 | return 0; |
350 | } |
351 | |
e1a479c5 |
352 | assert(stash); |
353 | |
bfcb3514 |
354 | hvname = HvNAME_get(stash); |
355 | if (!hvname) |
e1a479c5 |
356 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 |
357 | |
e1a479c5 |
358 | assert(hvname); |
359 | assert(name); |
463ee0b2 |
360 | |
bfcb3514 |
361 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a |
362 | |
dd69841b |
363 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 |
364 | |
365 | /* check locally for a real method or a cache entry */ |
366 | gvp = (GV**)hv_fetch(stash, name, len, create); |
367 | if(gvp) { |
368 | topgv = *gvp; |
369 | assert(topgv); |
370 | if (SvTYPE(topgv) != SVt_PVGV) |
371 | gv_init(topgv, stash, name, len, TRUE); |
372 | if ((cand_cv = GvCV(topgv))) { |
373 | /* If genuine method or valid cache entry, use it */ |
374 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { |
375 | return topgv; |
376 | } |
377 | else { |
378 | /* stale cache entry, junk it and move on */ |
379 | SvREFCNT_dec(cand_cv); |
380 | GvCV(topgv) = cand_cv = NULL; |
381 | GvCVGEN(topgv) = 0; |
382 | } |
383 | } |
384 | else if (GvCVGEN(topgv) == topgen_cmp) { |
385 | /* cache indicates no such method definitively */ |
386 | return 0; |
387 | } |
463ee0b2 |
388 | } |
79072805 |
389 | |
e1a479c5 |
390 | packlen = HvNAMELEN_get(stash); |
391 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { |
392 | HV* basestash; |
393 | packlen -= 7; |
394 | basestash = gv_stashpvn(hvname, packlen, GV_ADD); |
395 | linear_av = mro_get_linear_isa(basestash); |
9607fc9c |
396 | } |
e1a479c5 |
397 | else { |
398 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ |
79072805 |
399 | } |
a0d0e21e |
400 | |
e1a479c5 |
401 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
402 | items = AvFILLp(linear_av); /* no +1, to skip over self */ |
403 | while (items--) { |
404 | linear_sv = *linear_svp++; |
405 | assert(linear_sv); |
406 | cstash = gv_stashsv(linear_sv, 0); |
407 | |
dd69841b |
408 | if (!cstash) { |
b0c482e3 |
409 | if (ckWARN(WARN_SYNTAX)) |
410 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA", |
e1a479c5 |
411 | SVfARG(linear_sv), hvname); |
412 | continue; |
413 | } |
9607fc9c |
414 | |
e1a479c5 |
415 | assert(cstash); |
416 | |
417 | gvp = (GV**)hv_fetch(cstash, name, len, 0); |
418 | if (!gvp) continue; |
419 | candidate = *gvp; |
420 | assert(candidate); |
421 | if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE); |
422 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { |
423 | /* |
424 | * Found real method, cache method in topgv if: |
425 | * 1. topgv has no synonyms (else inheritance crosses wires) |
426 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
427 | */ |
428 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { |
429 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); |
430 | SvREFCNT_inc_simple_void_NN(cand_cv); |
431 | GvCV(topgv) = cand_cv; |
432 | GvCVGEN(topgv) = topgen_cmp; |
433 | } |
434 | return candidate; |
435 | } |
436 | } |
9607fc9c |
437 | |
e1a479c5 |
438 | /* Check UNIVERSAL without caching */ |
439 | if(level == 0 || level == -1) { |
440 | candidate = gv_fetchmeth(NULL, name, len, 1); |
441 | if(candidate) { |
442 | cand_cv = GvCV(candidate); |
443 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { |
444 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); |
445 | SvREFCNT_inc_simple_void_NN(cand_cv); |
446 | GvCV(topgv) = cand_cv; |
447 | GvCVGEN(topgv) = topgen_cmp; |
448 | } |
449 | return candidate; |
450 | } |
451 | } |
452 | |
453 | if (topgv && GvREFCNT(topgv) == 1) { |
454 | /* cache the fact that the method is not defined */ |
455 | GvCVGEN(topgv) = topgen_cmp; |
a0d0e21e |
456 | } |
457 | |
79072805 |
458 | return 0; |
459 | } |
460 | |
954c1994 |
461 | /* |
611c1e95 |
462 | =for apidoc gv_fetchmeth_autoload |
463 | |
464 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. |
465 | Returns a glob for the subroutine. |
466 | |
467 | For an autoloaded subroutine without a GV, will create a GV even |
468 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() |
469 | of the result may be zero. |
470 | |
471 | =cut |
472 | */ |
473 | |
474 | GV * |
475 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
476 | { |
477 | GV *gv = gv_fetchmeth(stash, name, len, level); |
478 | |
479 | if (!gv) { |
611c1e95 |
480 | CV *cv; |
481 | GV **gvp; |
482 | |
483 | if (!stash) |
6136c704 |
484 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
5c7983e5 |
485 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
6136c704 |
486 | return NULL; |
5c7983e5 |
487 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 |
488 | return NULL; |
611c1e95 |
489 | cv = GvCV(gv); |
490 | if (!(CvROOT(cv) || CvXSUB(cv))) |
6136c704 |
491 | return NULL; |
611c1e95 |
492 | /* Have an autoload */ |
493 | if (level < 0) /* Cannot do without a stub */ |
494 | gv_fetchmeth(stash, name, len, 0); |
495 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
496 | if (!gvp) |
6136c704 |
497 | return NULL; |
611c1e95 |
498 | return *gvp; |
499 | } |
500 | return gv; |
501 | } |
502 | |
503 | /* |
954c1994 |
504 | =for apidoc gv_fetchmethod_autoload |
505 | |
506 | Returns the glob which contains the subroutine to call to invoke the method |
507 | on the C<stash>. In fact in the presence of autoloading this may be the |
508 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
509 | already setup. |
954c1994 |
510 | |
511 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
512 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
513 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
514 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
515 | with a non-zero C<autoload> parameter. |
954c1994 |
516 | |
517 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
518 | that if you want to keep the returned glob for a long time, you need to |
519 | check for it being "AUTOLOAD", since at the later time the call may load a |
520 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
521 | created via a side effect to do this. |
954c1994 |
522 | |
523 | These functions have the same side-effects and as C<gv_fetchmeth> with |
524 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
525 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
526 | C<call_sv> apply equally to these functions. |
954c1994 |
527 | |
528 | =cut |
529 | */ |
530 | |
dc848c6f |
531 | GV * |
864dbfa3 |
532 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
533 | { |
97aff369 |
534 | dVAR; |
08105a92 |
535 | register const char *nend; |
c445ea15 |
536 | const char *nsplit = NULL; |
a0d0e21e |
537 | GV* gv; |
0dae17bd |
538 | HV* ostash = stash; |
539 | |
540 | if (stash && SvTYPE(stash) < SVt_PVHV) |
5c284bb0 |
541 | stash = NULL; |
b267980d |
542 | |
463ee0b2 |
543 | for (nend = name; *nend; nend++) { |
9607fc9c |
544 | if (*nend == '\'') |
a0d0e21e |
545 | nsplit = nend; |
9607fc9c |
546 | else if (*nend == ':' && *(nend + 1) == ':') |
547 | nsplit = ++nend; |
a0d0e21e |
548 | } |
549 | if (nsplit) { |
9d4ba2ae |
550 | const char * const origname = name; |
a0d0e21e |
551 | name = nsplit + 1; |
a0d0e21e |
552 | if (*nsplit == ':') |
553 | --nsplit; |
9607fc9c |
554 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
555 | /* ->SUPER::method should really be looked up in original stash */ |
b37c2d43 |
556 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
557 | CopSTASHPV(PL_curcop))); |
af09ea45 |
558 | /* __PACKAGE__::SUPER stash should be autovivified */ |
da51bb9b |
559 | stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), GV_ADD); |
cea2e8a9 |
560 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 |
561 | origname, HvNAME_get(stash), name) ); |
4633a7c4 |
562 | } |
e189a56d |
563 | else { |
af09ea45 |
564 | /* don't autovifify if ->NoSuchStash::method */ |
da51bb9b |
565 | stash = gv_stashpvn(origname, nsplit - origname, 0); |
e189a56d |
566 | |
567 | /* however, explicit calls to Pkg::SUPER::method may |
568 | happen, and may require autovivification to work */ |
569 | if (!stash && (nsplit - origname) >= 7 && |
570 | strnEQ(nsplit - 7, "::SUPER", 7) && |
da51bb9b |
571 | gv_stashpvn(origname, nsplit - origname - 7, 0)) |
572 | stash = gv_stashpvn(origname, nsplit - origname, GV_ADD); |
e189a56d |
573 | } |
0dae17bd |
574 | ostash = stash; |
4633a7c4 |
575 | } |
576 | |
9607fc9c |
577 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
578 | if (!gv) { |
2f6e0fe7 |
579 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
580 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
581 | else if (autoload) |
0dae17bd |
582 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 |
583 | } |
dc848c6f |
584 | else if (autoload) { |
9d4ba2ae |
585 | CV* const cv = GvCV(gv); |
09280a33 |
586 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
587 | GV* stubgv; |
588 | GV* autogv; |
589 | |
590 | if (CvANON(cv)) |
591 | stubgv = gv; |
592 | else { |
593 | stubgv = CvGV(cv); |
594 | if (GvCV(stubgv) != cv) /* orphaned import */ |
595 | stubgv = gv; |
596 | } |
597 | autogv = gv_autoload4(GvSTASH(stubgv), |
598 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
599 | if (autogv) |
600 | gv = autogv; |
601 | } |
602 | } |
44a8e56a |
603 | |
604 | return gv; |
605 | } |
606 | |
607 | GV* |
864dbfa3 |
608 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
609 | { |
27da23d5 |
610 | dVAR; |
44a8e56a |
611 | GV* gv; |
612 | CV* cv; |
613 | HV* varstash; |
614 | GV* vargv; |
615 | SV* varsv; |
e1ec3a88 |
616 | const char *packname = ""; |
eae70eaa |
617 | STRLEN packname_len = 0; |
44a8e56a |
618 | |
5c7983e5 |
619 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
a0714e2c |
620 | return NULL; |
0dae17bd |
621 | if (stash) { |
622 | if (SvTYPE(stash) < SVt_PVHV) { |
e62f0680 |
623 | packname = SvPV_const((SV*)stash, packname_len); |
5c284bb0 |
624 | stash = NULL; |
0dae17bd |
625 | } |
626 | else { |
bfcb3514 |
627 | packname = HvNAME_get(stash); |
7423f6db |
628 | packname_len = HvNAMELEN_get(stash); |
0dae17bd |
629 | } |
630 | } |
5c7983e5 |
631 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c |
632 | return NULL; |
dc848c6f |
633 | cv = GvCV(gv); |
634 | |
adb5a9ae |
635 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c |
636 | return NULL; |
ed850460 |
637 | |
dc848c6f |
638 | /* |
639 | * Inheriting AUTOLOAD for non-methods works ... for now. |
640 | */ |
041457d9 |
641 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
642 | && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) |
643 | ) |
12bcd1a6 |
644 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f |
645 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd |
646 | packname, (int)len, name); |
44a8e56a |
647 | |
aed2304a |
648 | if (CvISXSUB(cv)) { |
adb5a9ae |
649 | /* rather than lookup/init $AUTOLOAD here |
650 | * only to have the XSUB do another lookup for $AUTOLOAD |
651 | * and split that value on the last '::', |
652 | * pass along the same data via some unused fields in the CV |
653 | */ |
654 | CvSTASH(cv) = stash; |
f880fe2f |
655 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 |
656 | SvCUR_set(cv, len); |
adb5a9ae |
657 | return gv; |
658 | } |
adb5a9ae |
659 | |
44a8e56a |
660 | /* |
661 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
662 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
663 | * use that, but for lack of anything better we will use the sub's |
664 | * original package to look up $AUTOLOAD. |
665 | */ |
666 | varstash = GvSTASH(CvGV(cv)); |
5c7983e5 |
667 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b |
668 | ENTER; |
669 | |
c69033f2 |
670 | if (!isGV(vargv)) { |
5c7983e5 |
671 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 |
672 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 |
673 | GvSV(vargv) = newSV(0); |
c69033f2 |
674 | #endif |
675 | } |
3d35f11b |
676 | LEAVE; |
e203899d |
677 | varsv = GvSVn(vargv); |
7423f6db |
678 | sv_setpvn(varsv, packname, packname_len); |
396482e1 |
679 | sv_catpvs(varsv, "::"); |
44a8e56a |
680 | sv_catpvn(varsv, name, len); |
a0d0e21e |
681 | return gv; |
682 | } |
683 | |
44a2ac75 |
684 | |
685 | /* require_tie_mod() internal routine for requiring a module |
686 | * that implements the logic of automatical ties like %! and %- |
687 | * |
688 | * The "gv" parameter should be the glob. |
45cbc99a |
689 | * "varpv" holds the name of the var, used for error messages. |
690 | * "namesv" holds the module name. Its refcount will be decremented. |
44a2ac75 |
691 | * "methpv" holds the method name to test for to check that things |
45cbc99a |
692 | * are working reasonably close to as expected. |
693 | * "flags": if flag & 1 then save the scalar before loading. |
44a2ac75 |
694 | * For the protection of $! to work (it is set by this routine) |
695 | * the sv slot must already be magicalized. |
d2c93421 |
696 | */ |
44a2ac75 |
697 | STATIC HV* |
698 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) |
d2c93421 |
699 | { |
27da23d5 |
700 | dVAR; |
da51bb9b |
701 | HV* stash = gv_stashsv(namesv, 0); |
45cbc99a |
702 | |
44a2ac75 |
703 | if (!stash || !(gv_fetchmethod(stash, methpv))) { |
45cbc99a |
704 | SV *module = newSVsv(namesv); |
705 | char varname = *varpv; /* varpv might be clobbered by load_module, |
706 | so save it. For the moment it's always |
707 | a single char. */ |
d2c93421 |
708 | dSP; |
d2c93421 |
709 | ENTER; |
44a2ac75 |
710 | if ( flags & 1 ) |
45cbc99a |
711 | save_scalar(gv); |
cac54379 |
712 | PUSHSTACKi(PERLSI_MAGIC); |
45cbc99a |
713 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
cac54379 |
714 | POPSTACK; |
d2c93421 |
715 | LEAVE; |
716 | SPAGAIN; |
da51bb9b |
717 | stash = gv_stashsv(namesv, 0); |
44a2ac75 |
718 | if (!stash) |
45cbc99a |
719 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available", |
720 | varname, SVfARG(namesv)); |
721 | else if (!gv_fetchmethod(stash, methpv)) |
722 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s", |
723 | varname, SVfARG(namesv), methpv); |
d2c93421 |
724 | } |
45cbc99a |
725 | SvREFCNT_dec(namesv); |
44a2ac75 |
726 | return stash; |
d2c93421 |
727 | } |
728 | |
954c1994 |
729 | /* |
730 | =for apidoc gv_stashpv |
731 | |
da51bb9b |
732 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 |
733 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 |
734 | |
735 | =cut |
736 | */ |
737 | |
a0d0e21e |
738 | HV* |
864dbfa3 |
739 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
740 | { |
dc437b57 |
741 | return gv_stashpvn(name, strlen(name), create); |
742 | } |
743 | |
bc96cb06 |
744 | /* |
745 | =for apidoc gv_stashpvn |
746 | |
da51bb9b |
747 | Returns a pointer to the stash for a specified package. The C<namelen> |
748 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed |
749 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be |
750 | created if it does not already exist. If the package does not exist and |
751 | C<flags> is 0 (or any other setting that does not create packages) then NULL |
752 | is returned. |
753 | |
bc96cb06 |
754 | |
755 | =cut |
756 | */ |
757 | |
dc437b57 |
758 | HV* |
da51bb9b |
759 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 |
760 | { |
0cea0058 |
761 | char smallbuf[128]; |
46fc3d4c |
762 | char *tmpbuf; |
a0d0e21e |
763 | HV *stash; |
764 | GV *tmpgv; |
dc437b57 |
765 | |
798b63bc |
766 | if (namelen + 2 <= sizeof smallbuf) |
46fc3d4c |
767 | tmpbuf = smallbuf; |
768 | else |
2ae0db35 |
769 | Newx(tmpbuf, namelen + 2, char); |
dc437b57 |
770 | Copy(name,tmpbuf,namelen,char); |
771 | tmpbuf[namelen++] = ':'; |
772 | tmpbuf[namelen++] = ':'; |
da51bb9b |
773 | tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, flags, SVt_PVHV); |
46fc3d4c |
774 | if (tmpbuf != smallbuf) |
775 | Safefree(tmpbuf); |
a0d0e21e |
776 | if (!tmpgv) |
da51bb9b |
777 | return NULL; |
a0d0e21e |
778 | if (!GvHV(tmpgv)) |
779 | GvHV(tmpgv) = newHV(); |
780 | stash = GvHV(tmpgv); |
bfcb3514 |
781 | if (!HvNAME_get(stash)) |
51a37f80 |
782 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e |
783 | return stash; |
463ee0b2 |
784 | } |
785 | |
954c1994 |
786 | /* |
787 | =for apidoc gv_stashsv |
788 | |
da51bb9b |
789 | Returns a pointer to the stash for a specified package. See C<gv_stashpvn>. |
954c1994 |
790 | |
791 | =cut |
792 | */ |
793 | |
a0d0e21e |
794 | HV* |
da51bb9b |
795 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e |
796 | { |
dc437b57 |
797 | STRLEN len; |
9d4ba2ae |
798 | const char * const ptr = SvPV_const(sv,len); |
da51bb9b |
799 | return gv_stashpvn(ptr, len, flags); |
a0d0e21e |
800 | } |
801 | |
802 | |
463ee0b2 |
803 | GV * |
7a5fd60d |
804 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { |
b7787f18 |
805 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d |
806 | } |
807 | |
808 | GV * |
809 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) { |
810 | STRLEN len; |
9d4ba2ae |
811 | const char * const nambeg = SvPV_const(name, len); |
7a5fd60d |
812 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
813 | } |
814 | |
815 | GV * |
816 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, |
817 | I32 sv_type) |
79072805 |
818 | { |
97aff369 |
819 | dVAR; |
08105a92 |
820 | register const char *name = nambeg; |
c445ea15 |
821 | register GV *gv = NULL; |
79072805 |
822 | GV**gvp; |
79072805 |
823 | I32 len; |
b3d904f3 |
824 | register const char *name_cursor; |
c445ea15 |
825 | HV *stash = NULL; |
add2581e |
826 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a |
827 | const I32 no_expand = flags & GV_NOEXPAND; |
780a5241 |
828 | const I32 add = flags & ~GV_NOADD_MASK; |
b3d904f3 |
829 | const char *const name_end = nambeg + full_len; |
830 | const char *const name_em1 = name_end - 1; |
79072805 |
831 | |
fafc274c |
832 | if (flags & GV_NOTQUAL) { |
833 | /* Caller promised that there is no stash, so we can skip the check. */ |
834 | len = full_len; |
835 | goto no_stash; |
836 | } |
837 | |
b208e10c |
838 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
839 | /* accidental stringify on a GV? */ |
c07a80fd |
840 | name++; |
b208e10c |
841 | } |
c07a80fd |
842 | |
b3d904f3 |
843 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
844 | if ((*name_cursor == ':' && name_cursor < name_em1 |
845 | && name_cursor[1] == ':') |
846 | || (*name_cursor == '\'' && name_cursor[1])) |
463ee0b2 |
847 | { |
463ee0b2 |
848 | if (!stash) |
3280af22 |
849 | stash = PL_defstash; |
dc437b57 |
850 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
851 | return NULL; |
463ee0b2 |
852 | |
b3d904f3 |
853 | len = name_cursor - name; |
85e6fe83 |
854 | if (len > 0) { |
0cea0058 |
855 | char smallbuf[128]; |
62b57502 |
856 | char *tmpbuf; |
62b57502 |
857 | |
798b63bc |
858 | if (len + 2 <= (I32)sizeof (smallbuf)) |
3c78fafa |
859 | tmpbuf = smallbuf; |
62b57502 |
860 | else |
2ae0db35 |
861 | Newx(tmpbuf, len+2, char); |
a0d0e21e |
862 | Copy(name, tmpbuf, len, char); |
863 | tmpbuf[len++] = ':'; |
864 | tmpbuf[len++] = ':'; |
463ee0b2 |
865 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
a0714e2c |
866 | gv = gvp ? *gvp : NULL; |
3280af22 |
867 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
868 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
869 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
870 | else |
871 | GvMULTI_on(gv); |
872 | } |
3c78fafa |
873 | if (tmpbuf != smallbuf) |
62b57502 |
874 | Safefree(tmpbuf); |
3280af22 |
875 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0714e2c |
876 | return NULL; |
85e6fe83 |
877 | |
463ee0b2 |
878 | if (!(stash = GvHV(gv))) |
879 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
880 | |
bfcb3514 |
881 | if (!HvNAME_get(stash)) |
b3d904f3 |
882 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); |
463ee0b2 |
883 | } |
884 | |
b3d904f3 |
885 | if (*name_cursor == ':') |
886 | name_cursor++; |
887 | name_cursor++; |
888 | name = name_cursor; |
ad6bfa9d |
889 | if (name == name_end) |
017a3ce5 |
890 | return gv ? gv : (GV*)*hv_fetchs(PL_defstash, "main::", TRUE); |
79072805 |
891 | } |
79072805 |
892 | } |
b3d904f3 |
893 | len = name_cursor - name; |
463ee0b2 |
894 | |
895 | /* No stash in name, so see how we can default */ |
896 | |
897 | if (!stash) { |
fafc274c |
898 | no_stash: |
8ccce9ae |
899 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c |
900 | bool global = FALSE; |
901 | |
8ccce9ae |
902 | switch (len) { |
903 | case 1: |
18ea00d7 |
904 | if (*name == '_') |
9d116dd7 |
905 | global = TRUE; |
18ea00d7 |
906 | break; |
8ccce9ae |
907 | case 3: |
908 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') |
909 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') |
910 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) |
9d116dd7 |
911 | global = TRUE; |
18ea00d7 |
912 | break; |
8ccce9ae |
913 | case 4: |
914 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
915 | && name[3] == 'V') |
9d116dd7 |
916 | global = TRUE; |
18ea00d7 |
917 | break; |
8ccce9ae |
918 | case 5: |
919 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' |
920 | && name[3] == 'I' && name[4] == 'N') |
463ee0b2 |
921 | global = TRUE; |
18ea00d7 |
922 | break; |
8ccce9ae |
923 | case 6: |
924 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') |
925 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') |
926 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) |
927 | global = TRUE; |
928 | break; |
929 | case 7: |
930 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
931 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' |
932 | && name[6] == 'T') |
18ea00d7 |
933 | global = TRUE; |
934 | break; |
463ee0b2 |
935 | } |
9607fc9c |
936 | |
463ee0b2 |
937 | if (global) |
3280af22 |
938 | stash = PL_defstash; |
923e4eb5 |
939 | else if (IN_PERL_COMPILETIME) { |
3280af22 |
940 | stash = PL_curstash; |
941 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
942 | sv_type != SVt_PVCV && |
943 | sv_type != SVt_PVGV && |
4633a7c4 |
944 | sv_type != SVt_PVFM && |
c07a80fd |
945 | sv_type != SVt_PVIO && |
70ec6265 |
946 | !(len == 1 && sv_type == SVt_PV && |
947 | (*name == 'a' || *name == 'b')) ) |
748a9306 |
948 | { |
4633a7c4 |
949 | gvp = (GV**)hv_fetch(stash,name,len,0); |
950 | if (!gvp || |
3280af22 |
951 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
952 | SvTYPE(*gvp) != SVt_PVGV) |
953 | { |
d4c19fe8 |
954 | stash = NULL; |
a5f75d66 |
955 | } |
155aba94 |
956 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
957 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
958 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
959 | { |
cea2e8a9 |
960 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
961 | sv_type == SVt_PVAV ? '@' : |
962 | sv_type == SVt_PVHV ? '%' : '$', |
963 | name); |
8ebc5c01 |
964 | if (GvCVu(*gvp)) |
cc507455 |
965 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
d4c19fe8 |
966 | stash = NULL; |
4633a7c4 |
967 | } |
a0d0e21e |
968 | } |
85e6fe83 |
969 | } |
463ee0b2 |
970 | else |
1d7c1841 |
971 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
972 | } |
973 | else |
3280af22 |
974 | stash = PL_defstash; |
463ee0b2 |
975 | } |
976 | |
977 | /* By this point we should have a stash and a name */ |
978 | |
a0d0e21e |
979 | if (!stash) { |
5a844595 |
980 | if (add) { |
9d4ba2ae |
981 | SV * const err = Perl_mess(aTHX_ |
5a844595 |
982 | "Global symbol \"%s%s\" requires explicit package name", |
983 | (sv_type == SVt_PV ? "$" |
984 | : sv_type == SVt_PVAV ? "@" |
985 | : sv_type == SVt_PVHV ? "%" |
608b3986 |
986 | : ""), name); |
e7f343b6 |
987 | GV *gv; |
608b3986 |
988 | if (USE_UTF8_IN_NAMES) |
989 | SvUTF8_on(err); |
990 | qerror(err); |
e7f343b6 |
991 | gv = gv_fetchpvn_flags("<none>::", 8, GV_ADDMULTI, SVt_PVHV); |
992 | if(!gv) { |
993 | /* symbol table under destruction */ |
994 | return NULL; |
995 | } |
996 | stash = GvHV(gv); |
a0d0e21e |
997 | } |
d7aacf4e |
998 | else |
a0714e2c |
999 | return NULL; |
a0d0e21e |
1000 | } |
1001 | |
1002 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
1003 | return NULL; |
a0d0e21e |
1004 | |
79072805 |
1005 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
1006 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
a0714e2c |
1007 | return NULL; |
79072805 |
1008 | gv = *gvp; |
1009 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
1010 | if (add) { |
a5f75d66 |
1011 | GvMULTI_on(gv); |
a0d0e21e |
1012 | gv_init_sv(gv, sv_type); |
45cbc99a |
1013 | if (len == 1 && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) { |
44a2ac75 |
1014 | if (*name == '!') |
1015 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
45cbc99a |
1016 | else if (*name == '-' || *name == '+') |
192b9cd1 |
1017 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
45cbc99a |
1018 | } |
a0d0e21e |
1019 | } |
79072805 |
1020 | return gv; |
add2581e |
1021 | } else if (no_init) { |
55d729e4 |
1022 | return gv; |
e26df76a |
1023 | } else if (no_expand && SvROK(gv)) { |
1024 | return gv; |
79072805 |
1025 | } |
93a17b20 |
1026 | |
1027 | /* Adding a new symbol */ |
1028 | |
0453d815 |
1029 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d |
1030 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 |
1031 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
1032 | gv_init_sv(gv, sv_type); |
93a17b20 |
1033 | |
a0288114 |
1034 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d |
1035 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
1036 | GvMULTI_on(gv) ; |
1037 | |
93a17b20 |
1038 | /* set up magic where warranted */ |
cc4c2da6 |
1039 | if (len > 1) { |
9431620d |
1040 | #ifndef EBCDIC |
cc4c2da6 |
1041 | if (*name > 'V' ) { |
6f207bd3 |
1042 | NOOP; |
cc4c2da6 |
1043 | /* Nothing else to do. |
91f565cb |
1044 | The compiler will probably turn the switch statement into a |
cc4c2da6 |
1045 | branch table. Make sure we avoid even that small overhead for |
1046 | the common case of lower case variable names. */ |
9431620d |
1047 | } else |
1048 | #endif |
1049 | { |
b464bac0 |
1050 | const char * const name2 = name + 1; |
cc4c2da6 |
1051 | switch (*name) { |
1052 | case 'A': |
1053 | if (strEQ(name2, "RGV")) { |
1054 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
1055 | } |
7b8203e3 |
1056 | else if (strEQ(name2, "RGVOUT")) { |
1057 | GvMULTI_on(gv); |
1058 | } |
cc4c2da6 |
1059 | break; |
1060 | case 'E': |
1061 | if (strnEQ(name2, "XPORT", 5)) |
1062 | GvMULTI_on(gv); |
1063 | break; |
1064 | case 'I': |
1065 | if (strEQ(name2, "SA")) { |
9d4ba2ae |
1066 | AV* const av = GvAVn(gv); |
cc4c2da6 |
1067 | GvMULTI_on(gv); |
bd61b366 |
1068 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, NULL, 0); |
cc4c2da6 |
1069 | /* NOTE: No support for tied ISA */ |
1070 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
1071 | && AvFILLp(av) == -1) |
1072 | { |
e1ec3a88 |
1073 | const char *pname; |
cc4c2da6 |
1074 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
da51bb9b |
1075 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 |
1076 | av_push(av, newSVpvn(pname = "DB_File",7)); |
da51bb9b |
1077 | gv_stashpvn(pname, 7, GV_ADD); |
cc4c2da6 |
1078 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
da51bb9b |
1079 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 |
1080 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
da51bb9b |
1081 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 |
1082 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
da51bb9b |
1083 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 |
1084 | } |
1085 | } |
1086 | break; |
1087 | case 'O': |
1088 | if (strEQ(name2, "VERLOAD")) { |
9d4ba2ae |
1089 | HV* const hv = GvHVn(gv); |
cc4c2da6 |
1090 | GvMULTI_on(gv); |
a0714e2c |
1091 | hv_magic(hv, NULL, PERL_MAGIC_overload); |
cc4c2da6 |
1092 | } |
1093 | break; |
1094 | case 'S': |
1095 | if (strEQ(name2, "IG")) { |
1096 | HV *hv; |
1097 | I32 i; |
1098 | if (!PL_psig_ptr) { |
a02a5408 |
1099 | Newxz(PL_psig_ptr, SIG_SIZE, SV*); |
1100 | Newxz(PL_psig_name, SIG_SIZE, SV*); |
1101 | Newxz(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 |
1102 | } |
1103 | GvMULTI_on(gv); |
1104 | hv = GvHVn(gv); |
a0714e2c |
1105 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 |
1106 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 |
1107 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 |
1108 | if (init) |
1109 | sv_setsv(*init, &PL_sv_undef); |
1110 | PL_psig_ptr[i] = 0; |
1111 | PL_psig_name[i] = 0; |
1112 | PL_psig_pend[i] = 0; |
1113 | } |
1114 | } |
1115 | break; |
1116 | case 'V': |
1117 | if (strEQ(name2, "ERSION")) |
1118 | GvMULTI_on(gv); |
1119 | break; |
e5218da5 |
1120 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1121 | if (strEQ(name2, "HILD_ERROR_NATIVE")) |
1122 | goto magicalize; |
1123 | break; |
cc4c2da6 |
1124 | case '\005': /* $^ENCODING */ |
1125 | if (strEQ(name2, "NCODING")) |
1126 | goto magicalize; |
1127 | break; |
cde0cee5 |
1128 | case '\015': /* $^MATCH */ |
1129 | if (strEQ(name2, "ATCH")) |
2fdbfb4d |
1130 | goto magicalize; |
cc4c2da6 |
1131 | case '\017': /* $^OPEN */ |
1132 | if (strEQ(name2, "PEN")) |
1133 | goto magicalize; |
1134 | break; |
cde0cee5 |
1135 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
1136 | if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH")) |
2fdbfb4d |
1137 | goto magicalize; |
cc4c2da6 |
1138 | case '\024': /* ${^TAINT} */ |
1139 | if (strEQ(name2, "AINT")) |
1140 | goto ro_magicalize; |
1141 | break; |
7cebcbc0 |
1142 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 |
1143 | if (strEQ(name2, "NICODE")) |
cc4c2da6 |
1144 | goto ro_magicalize; |
a0288114 |
1145 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 |
1146 | goto ro_magicalize; |
e07ea26a |
1147 | if (strEQ(name2, "TF8CACHE")) |
1148 | goto magicalize; |
cc4c2da6 |
1149 | break; |
1150 | case '\027': /* $^WARNING_BITS */ |
1151 | if (strEQ(name2, "ARNING_BITS")) |
1152 | goto magicalize; |
1153 | break; |
1154 | case '1': |
1155 | case '2': |
1156 | case '3': |
1157 | case '4': |
1158 | case '5': |
1159 | case '6': |
1160 | case '7': |
1161 | case '8': |
1162 | case '9': |
85e6fe83 |
1163 | { |
2fdbfb4d |
1164 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
1165 | this test */ |
1166 | /* This snippet is taken from is_gv_magical */ |
cc4c2da6 |
1167 | const char *end = name + len; |
1168 | while (--end > name) { |
2fdbfb4d |
1169 | if (!isDIGIT(*end)) return gv; |
cc4c2da6 |
1170 | } |
2fdbfb4d |
1171 | goto magicalize; |
1d7c1841 |
1172 | } |
dc437b57 |
1173 | } |
93a17b20 |
1174 | } |
392db708 |
1175 | } else { |
1176 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will |
1177 | be case '\0' in this switch statement (ie a default case) */ |
cc4c2da6 |
1178 | switch (*name) { |
1179 | case '&': |
1180 | case '`': |
1181 | case '\'': |
1182 | if ( |
1183 | sv_type == SVt_PVAV || |
1184 | sv_type == SVt_PVHV || |
1185 | sv_type == SVt_PVCV || |
1186 | sv_type == SVt_PVFM || |
1187 | sv_type == SVt_PVIO |
1188 | ) { break; } |
1189 | PL_sawampersand = TRUE; |
2fdbfb4d |
1190 | goto magicalize; |
cc4c2da6 |
1191 | |
1192 | case ':': |
c69033f2 |
1193 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 |
1194 | goto magicalize; |
1195 | |
1196 | case '?': |
ff0cee69 |
1197 | #ifdef COMPLEX_STATUS |
c69033f2 |
1198 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 |
1199 | #endif |
cc4c2da6 |
1200 | goto magicalize; |
ff0cee69 |
1201 | |
cc4c2da6 |
1202 | case '!': |
67261566 |
1203 | GvMULTI_on(gv); |
44a2ac75 |
1204 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 |
1205 | |
c69033f2 |
1206 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
1207 | |
44a2ac75 |
1208 | /* magicalization must be done before require_tie_mod is called */ |
67261566 |
1209 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
44a2ac75 |
1210 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
d2c93421 |
1211 | |
6cef1e77 |
1212 | break; |
cc4c2da6 |
1213 | case '-': |
44a2ac75 |
1214 | case '+': |
1215 | GvMULTI_on(gv); /* no used once warnings here */ |
1216 | { |
44a2ac75 |
1217 | AV* const av = GvAVn(gv); |
67261566 |
1218 | SV* const avc = (*name == '+') ? (SV*)av : NULL; |
44a2ac75 |
1219 | |
67261566 |
1220 | sv_magic((SV*)av, avc, PERL_MAGIC_regdata, NULL, 0); |
44a2ac75 |
1221 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
67261566 |
1222 | if (avc) |
44a2ac75 |
1223 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 |
1224 | SvREADONLY_on(av); |
67261566 |
1225 | |
1226 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
192b9cd1 |
1227 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
67261566 |
1228 | |
80305961 |
1229 | break; |
cc4c2da6 |
1230 | } |
1231 | case '*': |
cc4c2da6 |
1232 | case '#': |
fafcdf9e |
1233 | if (sv_type == SVt_PV && ckWARN2_d(WARN_DEPRECATED, WARN_SYNTAX)) |
cc4c2da6 |
1234 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
8ae1fe26 |
1235 | "$%c is no longer supported", *name); |
1236 | break; |
cc4c2da6 |
1237 | case '|': |
c69033f2 |
1238 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 |
1239 | goto magicalize; |
1240 | |
b3ca2e83 |
1241 | case '\010': /* $^H */ |
1242 | { |
1243 | HV *const hv = GvHVn(gv); |
1244 | hv_magic(hv, NULL, PERL_MAGIC_hints); |
1245 | } |
1246 | goto magicalize; |
cc4c2da6 |
1247 | case '\023': /* $^S */ |
2fdbfb4d |
1248 | ro_magicalize: |
1249 | SvREADONLY_on(GvSVn(gv)); |
1250 | /* FALL THROUGH */ |
cc4c2da6 |
1251 | case '1': |
1252 | case '2': |
1253 | case '3': |
1254 | case '4': |
1255 | case '5': |
1256 | case '6': |
1257 | case '7': |
1258 | case '8': |
1259 | case '9': |
cc4c2da6 |
1260 | case '[': |
1261 | case '^': |
1262 | case '~': |
1263 | case '=': |
1264 | case '%': |
1265 | case '.': |
1266 | case '(': |
1267 | case ')': |
1268 | case '<': |
1269 | case '>': |
1270 | case ',': |
1271 | case '\\': |
1272 | case '/': |
1273 | case '\001': /* $^A */ |
1274 | case '\003': /* $^C */ |
1275 | case '\004': /* $^D */ |
1276 | case '\005': /* $^E */ |
1277 | case '\006': /* $^F */ |
cc4c2da6 |
1278 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1279 | case '\016': /* $^N */ |
1280 | case '\017': /* $^O */ |
1281 | case '\020': /* $^P */ |
1282 | case '\024': /* $^T */ |
1283 | case '\027': /* $^W */ |
1284 | magicalize: |
c69033f2 |
1285 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
cc4c2da6 |
1286 | break; |
e521374c |
1287 | |
cc4c2da6 |
1288 | case '\014': /* $^L */ |
c69033f2 |
1289 | sv_setpvn(GvSVn(gv),"\f",1); |
1290 | PL_formfeed = GvSVn(gv); |
463ee0b2 |
1291 | break; |
cc4c2da6 |
1292 | case ';': |
c69033f2 |
1293 | sv_setpvn(GvSVn(gv),"\034",1); |
463ee0b2 |
1294 | break; |
cc4c2da6 |
1295 | case ']': |
1296 | { |
c69033f2 |
1297 | SV * const sv = GvSVn(gv); |
d7aa5382 |
1298 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f |
1299 | upg_version(PL_patchlevel, TRUE); |
7d54d38e |
1300 | GvSV(gv) = vnumify(PL_patchlevel); |
1301 | SvREADONLY_on(GvSV(gv)); |
1302 | SvREFCNT_dec(sv); |
93a17b20 |
1303 | } |
1304 | break; |
cc4c2da6 |
1305 | case '\026': /* $^V */ |
1306 | { |
c69033f2 |
1307 | SV * const sv = GvSVn(gv); |
f9be5ac8 |
1308 | GvSV(gv) = new_version(PL_patchlevel); |
1309 | SvREADONLY_on(GvSV(gv)); |
1310 | SvREFCNT_dec(sv); |
16070b82 |
1311 | } |
1312 | break; |
cc4c2da6 |
1313 | } |
79072805 |
1314 | } |
93a17b20 |
1315 | return gv; |
79072805 |
1316 | } |
1317 | |
1318 | void |
35a4481c |
1319 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1320 | { |
35a4481c |
1321 | const char *name; |
7423f6db |
1322 | STRLEN namelen; |
35a4481c |
1323 | const HV * const hv = GvSTASH(gv); |
43693395 |
1324 | if (!hv) { |
0c34ef67 |
1325 | SvOK_off(sv); |
43693395 |
1326 | return; |
1327 | } |
666ea192 |
1328 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 |
1329 | |
bfcb3514 |
1330 | name = HvNAME_get(hv); |
7423f6db |
1331 | if (name) { |
1332 | namelen = HvNAMELEN_get(hv); |
1333 | } else { |
e27ad1f2 |
1334 | name = "__ANON__"; |
7423f6db |
1335 | namelen = 8; |
1336 | } |
a0288114 |
1337 | |
e27ad1f2 |
1338 | if (keepmain || strNE(name, "main")) { |
7423f6db |
1339 | sv_catpvn(sv,name,namelen); |
396482e1 |
1340 | sv_catpvs(sv,"::"); |
43693395 |
1341 | } |
257984c0 |
1342 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 |
1343 | } |
1344 | |
1345 | void |
35a4481c |
1346 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1347 | { |
46c461b5 |
1348 | const GV * const egv = GvEGV(gv); |
1349 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 |
1350 | } |
1351 | |
79072805 |
1352 | IO * |
864dbfa3 |
1353 | Perl_newIO(pTHX) |
79072805 |
1354 | { |
97aff369 |
1355 | dVAR; |
8990e307 |
1356 | GV *iogv; |
b9f83d2f |
1357 | IO * const io = (IO*)newSV_type(SVt_PVIO); |
158623e7 |
1358 | /* This used to read SvREFCNT(io) = 1; |
1359 | It's not clear why the reference count needed an explicit reset. NWC |
1360 | */ |
1361 | assert (SvREFCNT(io) == 1); |
8990e307 |
1362 | SvOBJECT_on(io); |
b464bac0 |
1363 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 |
1364 | hv_clear(PL_stashcache); |
71315bf2 |
1365 | iogv = gv_fetchpvs("FileHandle::", 0, SVt_PVHV); |
5f2d631d |
1366 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1367 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
71315bf2 |
1368 | iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV); |
b162af07 |
1369 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 |
1370 | return io; |
1371 | } |
1372 | |
1373 | void |
1146e912 |
1374 | Perl_gv_check(pTHX_ const HV *stash) |
79072805 |
1375 | { |
97aff369 |
1376 | dVAR; |
79072805 |
1377 | register I32 i; |
463ee0b2 |
1378 | |
8990e307 |
1379 | if (!HvARRAY(stash)) |
1380 | return; |
a0d0e21e |
1381 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 |
1382 | const HE *entry; |
dc437b57 |
1383 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 |
1384 | register GV *gv; |
1385 | HV *hv; |
dc437b57 |
1386 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f |
1387 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e |
1388 | { |
19b6c847 |
1389 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1390 | gv_check(hv); /* nested package */ |
1391 | } |
dc437b57 |
1392 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 |
1393 | const char *file; |
dc437b57 |
1394 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1395 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1396 | continue; |
1d7c1841 |
1397 | file = GvFILE(gv); |
1d7c1841 |
1398 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1399 | #ifdef USE_ITHREADS |
dd374669 |
1400 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 |
1401 | #else |
1402 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1403 | #endif |
9014280d |
1404 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 |
1405 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 |
1406 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 |
1407 | } |
79072805 |
1408 | } |
1409 | } |
1410 | } |
1411 | |
1412 | GV * |
e1ec3a88 |
1413 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 |
1414 | { |
97aff369 |
1415 | dVAR; |
cea2e8a9 |
1416 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 |
1417 | GV_ADD, SVt_PVGV); |
79072805 |
1418 | } |
1419 | |
1420 | /* hopefully this is only called on local symbol table entries */ |
1421 | |
1422 | GP* |
864dbfa3 |
1423 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1424 | { |
97aff369 |
1425 | dVAR; |
1d7c1841 |
1426 | if (!gp) |
d4c19fe8 |
1427 | return NULL; |
79072805 |
1428 | gp->gp_refcnt++; |
44a8e56a |
1429 | if (gp->gp_cv) { |
1430 | if (gp->gp_cvgen) { |
e1a479c5 |
1431 | /* If the GP they asked for a reference to contains |
1432 | a method cache entry, clear it first, so that we |
1433 | don't infect them with our cached entry */ |
44a8e56a |
1434 | SvREFCNT_dec(gp->gp_cv); |
601f1833 |
1435 | gp->gp_cv = NULL; |
44a8e56a |
1436 | gp->gp_cvgen = 0; |
1437 | } |
44a8e56a |
1438 | } |
79072805 |
1439 | return gp; |
79072805 |
1440 | } |
1441 | |
1442 | void |
864dbfa3 |
1443 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1444 | { |
97aff369 |
1445 | dVAR; |
79072805 |
1446 | GP* gp; |
1447 | |
f7877b28 |
1448 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 |
1449 | return; |
f248d071 |
1450 | if (gp->gp_refcnt == 0) { |
1451 | if (ckWARN_d(WARN_INTERNAL)) |
9014280d |
1452 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc |
1453 | "Attempt to free unreferenced glob pointers" |
1454 | pTHX__FORMAT pTHX__VALUE); |
79072805 |
1455 | return; |
1456 | } |
748a9306 |
1457 | if (--gp->gp_refcnt > 0) { |
1458 | if (gp->gp_egv == gv) |
1459 | gp->gp_egv = 0; |
dd38834b |
1460 | GvGP(gv) = 0; |
79072805 |
1461 | return; |
748a9306 |
1462 | } |
79072805 |
1463 | |
c9ce39a9 |
1464 | if (gp->gp_file_hek) |
1465 | unshare_hek(gp->gp_file_hek); |
c9da69fb |
1466 | SvREFCNT_dec(gp->gp_sv); |
1467 | SvREFCNT_dec(gp->gp_av); |
bfcb3514 |
1468 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1469 | Somehow gp->gp_hv can end up pointing at freed garbage. */ |
1470 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { |
bfcb3514 |
1471 | const char *hvname = HvNAME_get(gp->gp_hv); |
1472 | if (PL_stashcache && hvname) |
7423f6db |
1473 | hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
1474 | G_DISCARD); |
bfcb3514 |
1475 | SvREFCNT_dec(gp->gp_hv); |
13207a71 |
1476 | } |
c9da69fb |
1477 | SvREFCNT_dec(gp->gp_io); |
1478 | SvREFCNT_dec(gp->gp_cv); |
1479 | SvREFCNT_dec(gp->gp_form); |
748a9306 |
1480 | |
79072805 |
1481 | Safefree(gp); |
1482 | GvGP(gv) = 0; |
1483 | } |
1484 | |
d460ef45 |
1485 | int |
1486 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1487 | { |
53c1dcc0 |
1488 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1489 | PERL_UNUSED_ARG(sv); |
dd374669 |
1490 | |
d460ef45 |
1491 | if (amtp && AMT_AMAGIC(amtp)) { |
1492 | int i; |
1493 | for (i = 1; i < NofAMmeth; i++) { |
53c1dcc0 |
1494 | CV * const cv = amtp->table[i]; |
b37c2d43 |
1495 | if (cv) { |
d460ef45 |
1496 | SvREFCNT_dec((SV *) cv); |
601f1833 |
1497 | amtp->table[i] = NULL; |
d460ef45 |
1498 | } |
1499 | } |
1500 | } |
1501 | return 0; |
1502 | } |
1503 | |
a0d0e21e |
1504 | /* Updates and caches the CV's */ |
1505 | |
1506 | bool |
864dbfa3 |
1507 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1508 | { |
97aff369 |
1509 | dVAR; |
53c1dcc0 |
1510 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
a6006777 |
1511 | AMT amt; |
9b439311 |
1512 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 |
1513 | U32 newgen; |
a0d0e21e |
1514 | |
9b439311 |
1515 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 |
1516 | if (mg) { |
1517 | const AMT * const amtp = (AMT*)mg->mg_ptr; |
1518 | if (amtp->was_ok_am == PL_amagic_generation |
e1a479c5 |
1519 | && amtp->was_ok_sub == newgen) { |
14899595 |
1520 | return (bool)AMT_OVERLOADED(amtp); |
1521 | } |
1522 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
1523 | } |
a0d0e21e |
1524 | |
bfcb3514 |
1525 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e |
1526 | |
d460ef45 |
1527 | Zero(&amt,1,AMT); |
3280af22 |
1528 | amt.was_ok_am = PL_amagic_generation; |
e1a479c5 |
1529 | amt.was_ok_sub = newgen; |
a6006777 |
1530 | amt.fallback = AMGfallNO; |
1531 | amt.flags = 0; |
1532 | |
a6006777 |
1533 | { |
32251b26 |
1534 | int filled = 0, have_ovl = 0; |
1535 | int i, lim = 1; |
a6006777 |
1536 | |
22c35a8c |
1537 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1538 | |
89ffc314 |
1539 | /* Try to find via inheritance. */ |
53c1dcc0 |
1540 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1541 | SV * const sv = gv ? GvSV(gv) : NULL; |
1542 | CV* cv; |
89ffc314 |
1543 | |
1544 | if (!gv) |
32251b26 |
1545 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 |
1546 | #ifdef PERL_DONT_CREATE_GVSV |
1547 | else if (!sv) { |
6f207bd3 |
1548 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 |
1549 | } |
1550 | #endif |
89ffc314 |
1551 | else if (SvTRUE(sv)) |
1552 | amt.fallback=AMGfallYES; |
1553 | else if (SvOK(sv)) |
1554 | amt.fallback=AMGfallNEVER; |
a6006777 |
1555 | |
32251b26 |
1556 | for (i = 1; i < lim; i++) |
601f1833 |
1557 | amt.table[i] = NULL; |
32251b26 |
1558 | for (; i < NofAMmeth; i++) { |
6136c704 |
1559 | const char * const cooky = PL_AMG_names[i]; |
32251b26 |
1560 | /* Human-readable form, for debugging: */ |
6136c704 |
1561 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
e1ec3a88 |
1562 | const STRLEN l = strlen(cooky); |
89ffc314 |
1563 | |
a0288114 |
1564 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1565 | cp, HvNAME_get(stash)) ); |
611c1e95 |
1566 | /* don't fill the cache while looking up! |
1567 | Creation of inheritance stubs in intermediate packages may |
1568 | conflict with the logic of runtime method substitution. |
1569 | Indeed, for inheritance A -> B -> C, if C overloads "+0", |
1570 | then we could have created stubs for "(+0" in A and C too. |
1571 | But if B overloads "bool", we may want to use it for |
1572 | numifying instead of C's "+0". */ |
1573 | if (i >= DESTROY_amg) |
1574 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); |
1575 | else /* Autoload taken care of below */ |
1576 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); |
46fc3d4c |
1577 | cv = 0; |
89ffc314 |
1578 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 |
1579 | const char *hvname; |
44a8e56a |
1580 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 |
1581 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 |
1582 | /* This is a hack to support autoloading..., while |
1583 | knowing *which* methods were declared as overloaded. */ |
44a8e56a |
1584 | /* GvSV contains the name of the method. */ |
6136c704 |
1585 | GV *ngv = NULL; |
c69033f2 |
1586 | SV *gvsv = GvSV(gv); |
a0288114 |
1587 | |
1588 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ |
1589 | "\" for overloaded \"%s\" in package \"%.256s\"\n", |
ca0270c4 |
1590 | (void*)GvSV(gv), cp, hvname) ); |
c69033f2 |
1591 | if (!gvsv || !SvPOK(gvsv) |
1592 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), |
dc848c6f |
1593 | FALSE))) |
1594 | { |
a0288114 |
1595 | /* Can be an import stub (created by "can"). */ |
666ea192 |
1596 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
a0288114 |
1597 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1598 | "in package \"%.256s\"", |
35c1215d |
1599 | (GvCVGEN(gv) ? "Stub found while resolving" |
1600 | : "Can't resolve"), |
bfcb3514 |
1601 | name, cp, hvname); |
44a8e56a |
1602 | } |
dc848c6f |
1603 | cv = GvCV(gv = ngv); |
44a8e56a |
1604 | } |
b464bac0 |
1605 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 |
1606 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a |
1607 | GvNAME(CvGV(cv))) ); |
1608 | filled = 1; |
32251b26 |
1609 | if (i < DESTROY_amg) |
1610 | have_ovl = 1; |
611c1e95 |
1611 | } else if (gv) { /* Autoloaded... */ |
1612 | cv = (CV*)gv; |
1613 | filled = 1; |
44a8e56a |
1614 | } |
b37c2d43 |
1615 | amt.table[i]=(CV*)SvREFCNT_inc_simple(cv); |
a0d0e21e |
1616 | } |
a0d0e21e |
1617 | if (filled) { |
a6006777 |
1618 | AMT_AMAGIC_on(&amt); |
32251b26 |
1619 | if (have_ovl) |
1620 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1621 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1622 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1623 | return have_ovl; |
a0d0e21e |
1624 | } |
1625 | } |
a6006777 |
1626 | /* Here we have no table: */ |
9cbac4c7 |
1627 | /* no_table: */ |
a6006777 |
1628 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1629 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1630 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1631 | return FALSE; |
1632 | } |
1633 | |
32251b26 |
1634 | |
1635 | CV* |
1636 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1637 | { |
97aff369 |
1638 | dVAR; |
3f8f4626 |
1639 | MAGIC *mg; |
32251b26 |
1640 | AMT *amtp; |
e1a479c5 |
1641 | U32 newgen; |
9b439311 |
1642 | struct mro_meta* stash_meta; |
32251b26 |
1643 | |
bfcb3514 |
1644 | if (!stash || !HvNAME_get(stash)) |
601f1833 |
1645 | return NULL; |
e1a479c5 |
1646 | |
9b439311 |
1647 | stash_meta = HvMROMETA(stash); |
1648 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
e1a479c5 |
1649 | |
14befaf4 |
1650 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1651 | if (!mg) { |
1652 | do_update: |
1653 | Gv_AMupdate(stash); |
14befaf4 |
1654 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1655 | } |
a9fd4e40 |
1656 | assert(mg); |
32251b26 |
1657 | amtp = (AMT*)mg->mg_ptr; |
1658 | if ( amtp->was_ok_am != PL_amagic_generation |
e1a479c5 |
1659 | || amtp->was_ok_sub != newgen ) |
32251b26 |
1660 | goto do_update; |
3ad83ce7 |
1661 | if (AMT_AMAGIC(amtp)) { |
b7787f18 |
1662 | CV * const ret = amtp->table[id]; |
3ad83ce7 |
1663 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1664 | /* Passing it through may have resulted in a warning |
1665 | "Inherited AUTOLOAD for a non-method deprecated", since |
1666 | our caller is going through a function call, not a method call. |
1667 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ |
890ce7af |
1668 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 |
1669 | |
1670 | if (gv && GvCV(gv)) |
1671 | return GvCV(gv); |
1672 | } |
1673 | return ret; |
1674 | } |
a0288114 |
1675 | |
601f1833 |
1676 | return NULL; |
32251b26 |
1677 | } |
1678 | |
1679 | |
a0d0e21e |
1680 | SV* |
864dbfa3 |
1681 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1682 | { |
27da23d5 |
1683 | dVAR; |
b267980d |
1684 | MAGIC *mg; |
9c5ffd7c |
1685 | CV *cv=NULL; |
a0d0e21e |
1686 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1687 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 |
1688 | int off = 0, off1, lr = 0, notfound = 0; |
1689 | int postpr = 0, force_cpy = 0; |
1690 | int assign = AMGf_assign & flags; |
1691 | const int assignshift = assign ? 1 : 0; |
497b47a8 |
1692 | #ifdef DEBUGGING |
1693 | int fl=0; |
497b47a8 |
1694 | #endif |
25716404 |
1695 | HV* stash=NULL; |
a0d0e21e |
1696 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 |
1697 | && (stash = SvSTASH(SvRV(left))) |
1698 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1699 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1700 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 |
1701 | : NULL)) |
b267980d |
1702 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1703 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1704 | * usual method */ |
497b47a8 |
1705 | ( |
1706 | #ifdef DEBUGGING |
1707 | fl = 1, |
a0288114 |
1708 | #endif |
497b47a8 |
1709 | cv = cvp[off=method])))) { |
a0d0e21e |
1710 | lr = -1; /* Call method for left argument */ |
1711 | } else { |
1712 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1713 | int logic; |
1714 | |
1715 | /* look for substituted methods */ |
ee239bfe |
1716 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1717 | switch (method) { |
1718 | case inc_amg: |
ee239bfe |
1719 | force_cpy = 1; |
1720 | if ((cv = cvp[off=add_ass_amg]) |
1721 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1722 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1723 | } |
1724 | break; |
1725 | case dec_amg: |
ee239bfe |
1726 | force_cpy = 1; |
1727 | if ((cv = cvp[off = subtr_ass_amg]) |
1728 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1729 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1730 | } |
1731 | break; |
1732 | case bool__amg: |
1733 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1734 | break; |
1735 | case numer_amg: |
1736 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1737 | break; |
1738 | case string_amg: |
1739 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1740 | break; |
b7787f18 |
1741 | case not_amg: |
1742 | (void)((cv = cvp[off=bool__amg]) |
1743 | || (cv = cvp[off=numer_amg]) |
1744 | || (cv = cvp[off=string_amg])); |
1745 | postpr = 1; |
1746 | break; |
748a9306 |
1747 | case copy_amg: |
1748 | { |
76e3520e |
1749 | /* |
1750 | * SV* ref causes confusion with the interpreter variable of |
1751 | * the same name |
1752 | */ |
890ce7af |
1753 | SV* const tmpRef=SvRV(left); |
76e3520e |
1754 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1755 | /* |
1756 | * Just to be extra cautious. Maybe in some |
1757 | * additional cases sv_setsv is safe, too. |
1758 | */ |
890ce7af |
1759 | SV* const newref = newSVsv(tmpRef); |
748a9306 |
1760 | SvOBJECT_on(newref); |
96d4b0ee |
1761 | /* As a bit of a source compatibility hack, SvAMAGIC() and |
1762 | friends dereference an RV, to behave the same was as when |
1763 | overloading was stored on the reference, not the referant. |
1764 | Hence we can't use SvAMAGIC_on() |
1765 | */ |
1766 | SvFLAGS(newref) |= SVf_AMAGIC; |
b162af07 |
1767 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 |
1768 | return newref; |
1769 | } |
1770 | } |
1771 | break; |
a0d0e21e |
1772 | case abs_amg: |
b267980d |
1773 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1774 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af |
1775 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1776 | if (off1==lt_amg) { |
890ce7af |
1777 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1778 | lt_amg,AMGf_noright); |
1779 | logic = SvTRUE(lessp); |
1780 | } else { |
890ce7af |
1781 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1782 | ncmp_amg,AMGf_noright); |
1783 | logic = (SvNV(lessp) < 0); |
1784 | } |
1785 | if (logic) { |
1786 | if (off==subtr_amg) { |
1787 | right = left; |
748a9306 |
1788 | left = nullsv; |
a0d0e21e |
1789 | lr = 1; |
1790 | } |
1791 | } else { |
1792 | return left; |
1793 | } |
1794 | } |
1795 | break; |
1796 | case neg_amg: |
155aba94 |
1797 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1798 | right = left; |
1799 | left = sv_2mortal(newSViv(0)); |
1800 | lr = 1; |
1801 | } |
1802 | break; |
f216259d |
1803 | case int_amg: |
f5284f61 |
1804 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1805 | /* FAIL safe */ |
1806 | return NULL; /* Delegate operation to standard mechanisms. */ |
1807 | break; |
f5284f61 |
1808 | case to_sv_amg: |
1809 | case to_av_amg: |
1810 | case to_hv_amg: |
1811 | case to_gv_amg: |
1812 | case to_cv_amg: |
1813 | /* FAIL safe */ |
b267980d |
1814 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1815 | break; |
a0d0e21e |
1816 | default: |
1817 | goto not_found; |
1818 | } |
1819 | if (!cv) goto not_found; |
1820 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
25716404 |
1821 | && (stash = SvSTASH(SvRV(right))) |
1822 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1823 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1824 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 |
1825 | : NULL)) |
a0d0e21e |
1826 | && (cv = cvp[off=method])) { /* Method for right |
1827 | * argument found */ |
1828 | lr=1; |
b267980d |
1829 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1830 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1831 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1832 | && !(flags & AMGf_unary)) { |
1833 | /* We look for substitution for |
1834 | * comparison operations and |
fc36a67e |
1835 | * concatenation */ |
a0d0e21e |
1836 | if (method==concat_amg || method==concat_ass_amg |
1837 | || method==repeat_amg || method==repeat_ass_amg) { |
1838 | return NULL; /* Delegate operation to string conversion */ |
1839 | } |
1840 | off = -1; |
1841 | switch (method) { |
1842 | case lt_amg: |
1843 | case le_amg: |
1844 | case gt_amg: |
1845 | case ge_amg: |
1846 | case eq_amg: |
1847 | case ne_amg: |
1848 | postpr = 1; off=ncmp_amg; break; |
1849 | case slt_amg: |
1850 | case sle_amg: |
1851 | case sgt_amg: |
1852 | case sge_amg: |
1853 | case seq_amg: |
1854 | case sne_amg: |
1855 | postpr = 1; off=scmp_amg; break; |
1856 | } |
1857 | if (off != -1) cv = cvp[off]; |
1858 | if (!cv) { |
1859 | goto not_found; |
1860 | } |
1861 | } else { |
a6006777 |
1862 | not_found: /* No method found, either report or croak */ |
b267980d |
1863 | switch (method) { |
d11ee47c |
1864 | case lt_amg: |
1865 | case le_amg: |
1866 | case gt_amg: |
1867 | case ge_amg: |
1868 | case eq_amg: |
1869 | case ne_amg: |
1870 | case slt_amg: |
1871 | case sle_amg: |
1872 | case sgt_amg: |
1873 | case sge_amg: |
1874 | case seq_amg: |
1875 | case sne_amg: |
1876 | postpr = 0; break; |
b267980d |
1877 | case to_sv_amg: |
1878 | case to_av_amg: |
1879 | case to_hv_amg: |
1880 | case to_gv_amg: |
1881 | case to_cv_amg: |
1882 | /* FAIL safe */ |
1883 | return left; /* Delegate operation to standard mechanisms. */ |
1884 | break; |
1885 | } |
a0d0e21e |
1886 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1887 | notfound = 1; lr = -1; |
1888 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1889 | notfound = 1; lr = 1; |
4cc0ca18 |
1890 | } else if ((amtp && amtp->fallback >= AMGfallYES) && !DEBUG_o_TEST) { |
1891 | /* Skip generating the "no method found" message. */ |
1892 | return NULL; |
a0d0e21e |
1893 | } else { |
46fc3d4c |
1894 | SV *msg; |
774d564b |
1895 | if (off==-1) off=method; |
b267980d |
1896 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 |
1897 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 |
1898 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1899 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1900 | SvAMAGIC(left)? |
a0d0e21e |
1901 | "in overloaded package ": |
1902 | "has no overloaded magic", |
b267980d |
1903 | SvAMAGIC(left)? |
bfcb3514 |
1904 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e |
1905 | "", |
b267980d |
1906 | SvAMAGIC(right)? |
e7ea3e70 |
1907 | ",\n\tright argument in overloaded package ": |
b267980d |
1908 | (flags & AMGf_unary |
e7ea3e70 |
1909 | ? "" |
1910 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1911 | SvAMAGIC(right)? |
bfcb3514 |
1912 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c |
1913 | "")); |
a0d0e21e |
1914 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 |
1915 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e |
1916 | } else { |
be2597df |
1917 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e |
1918 | } |
1919 | return NULL; |
1920 | } |
ee239bfe |
1921 | force_cpy = force_cpy || assign; |
a0d0e21e |
1922 | } |
1923 | } |
497b47a8 |
1924 | #ifdef DEBUGGING |
a0d0e21e |
1925 | if (!notfound) { |
497b47a8 |
1926 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 |
1927 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 |
1928 | AMG_id2name(off), |
1929 | method+assignshift==off? "" : |
a0288114 |
1930 | " (initially \"", |
497b47a8 |
1931 | method+assignshift==off? "" : |
1932 | AMG_id2name(method+assignshift), |
a0288114 |
1933 | method+assignshift==off? "" : "\")", |
497b47a8 |
1934 | flags & AMGf_unary? "" : |
1935 | lr==1 ? " for right argument": " for left argument", |
1936 | flags & AMGf_unary? " for argument" : "", |
bfcb3514 |
1937 | stash ? HvNAME_get(stash) : "null", |
497b47a8 |
1938 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1939 | } |
497b47a8 |
1940 | #endif |
748a9306 |
1941 | /* Since we use shallow copy during assignment, we need |
1942 | * to dublicate the contents, probably calling user-supplied |
1943 | * version of copy operator |
1944 | */ |
ee239bfe |
1945 | /* We need to copy in following cases: |
1946 | * a) Assignment form was called. |
1947 | * assignshift==1, assign==T, method + 1 == off |
1948 | * b) Increment or decrement, called directly. |
1949 | * assignshift==0, assign==0, method + 0 == off |
1950 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1951 | * assignshift==0, assign==T, |
ee239bfe |
1952 | * force_cpy == T |
1953 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1954 | * assignshift==0, assign==0, |
ee239bfe |
1955 | * force_cpy == T |
1956 | * e) Assignment form translated to nomethod. |
1957 | * assignshift==1, assign==T, method + 1 != off |
1958 | * force_cpy == T |
1959 | */ |
1960 | /* off is method, method+assignshift, or a result of opcode substitution. |
1961 | * In the latter case assignshift==0, so only notfound case is important. |
1962 | */ |
1963 | if (( (method + assignshift == off) |
1964 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1965 | || force_cpy) |
1966 | RvDEEPCP(left); |
a0d0e21e |
1967 | { |
1968 | dSP; |
1969 | BINOP myop; |
1970 | SV* res; |
b7787f18 |
1971 | const bool oldcatch = CATCH_GET; |
a0d0e21e |
1972 | |
54310121 |
1973 | CATCH_SET(TRUE); |
a0d0e21e |
1974 | Zero(&myop, 1, BINOP); |
1975 | myop.op_last = (OP *) &myop; |
b37c2d43 |
1976 | myop.op_next = NULL; |
54310121 |
1977 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1978 | |
e788e7d3 |
1979 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1980 | ENTER; |
462e5cf6 |
1981 | SAVEOP(); |
533c011a |
1982 | PL_op = (OP *) &myop; |
3280af22 |
1983 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1984 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1985 | PUTBACK; |
cea2e8a9 |
1986 | pp_pushmark(); |
a0d0e21e |
1987 | |
924508f0 |
1988 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1989 | PUSHs(lr>0? right: left); |
1990 | PUSHs(lr>0? left: right); |
3280af22 |
1991 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1992 | if (notfound) { |
89ffc314 |
1993 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1994 | } |
1995 | PUSHs((SV*)cv); |
1996 | PUTBACK; |
1997 | |
155aba94 |
1998 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1999 | CALLRUNOPS(aTHX); |
a0d0e21e |
2000 | LEAVE; |
2001 | SPAGAIN; |
2002 | |
2003 | res=POPs; |
ebafeae7 |
2004 | PUTBACK; |
d3acc0f7 |
2005 | POPSTACK; |
54310121 |
2006 | CATCH_SET(oldcatch); |
a0d0e21e |
2007 | |
a0d0e21e |
2008 | if (postpr) { |
b7787f18 |
2009 | int ans; |
a0d0e21e |
2010 | switch (method) { |
2011 | case le_amg: |
2012 | case sle_amg: |
2013 | ans=SvIV(res)<=0; break; |
2014 | case lt_amg: |
2015 | case slt_amg: |
2016 | ans=SvIV(res)<0; break; |
2017 | case ge_amg: |
2018 | case sge_amg: |
2019 | ans=SvIV(res)>=0; break; |
2020 | case gt_amg: |
2021 | case sgt_amg: |
2022 | ans=SvIV(res)>0; break; |
2023 | case eq_amg: |
2024 | case seq_amg: |
2025 | ans=SvIV(res)==0; break; |
2026 | case ne_amg: |
2027 | case sne_amg: |
2028 | ans=SvIV(res)!=0; break; |
2029 | case inc_amg: |
2030 | case dec_amg: |
bbce6d69 |
2031 | SvSetSV(left,res); return left; |
dc437b57 |
2032 | case not_amg: |
fe7ac86a |
2033 | ans=!SvTRUE(res); break; |
b7787f18 |
2034 | default: |
2035 | ans=0; break; |
a0d0e21e |
2036 | } |
54310121 |
2037 | return boolSV(ans); |
748a9306 |
2038 | } else if (method==copy_amg) { |
2039 | if (!SvROK(res)) { |
cea2e8a9 |
2040 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
2041 | } |
2042 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
2043 | } else { |
2044 | return res; |
2045 | } |
2046 | } |
2047 | } |
c9d5ac95 |
2048 | |
2049 | /* |
7fc63493 |
2050 | =for apidoc is_gv_magical_sv |
c9d5ac95 |
2051 | |
7a5fd60d |
2052 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
2053 | |
2054 | =cut |
2055 | */ |
2056 | |
2057 | bool |
2058 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) |
2059 | { |
2060 | STRLEN len; |
b64e5050 |
2061 | const char * const temp = SvPV_const(name, len); |
7a5fd60d |
2062 | return is_gv_magical(temp, len, flags); |
2063 | } |
2064 | |
2065 | /* |
2066 | =for apidoc is_gv_magical |
2067 | |
c9d5ac95 |
2068 | Returns C<TRUE> if given the name of a magical GV. |
2069 | |
2070 | Currently only useful internally when determining if a GV should be |
2071 | created even in rvalue contexts. |
2072 | |
2073 | C<flags> is not used at present but available for future extension to |
2074 | allow selecting particular classes of magical variable. |
2075 | |
b9b0e72c |
2076 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
2077 | This assumption is met by all callers within the perl core, which all pass |
2078 | pointers returned by SvPV. |
2079 | |
c9d5ac95 |
2080 | =cut |
2081 | */ |
2082 | bool |
7fc63493 |
2083 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 |
2084 | { |
b37c2d43 |
2085 | PERL_UNUSED_CONTEXT; |
9d4ba2ae |
2086 | PERL_UNUSED_ARG(flags); |
2087 | |
b9b0e72c |
2088 | if (len > 1) { |
b464bac0 |
2089 | const char * const name1 = name + 1; |
b9b0e72c |
2090 | switch (*name) { |
2091 | case 'I': |
9431620d |
2092 | if (len == 3 && name1[1] == 'S' && name[2] == 'A') |
b9b0e72c |
2093 | goto yes; |
2094 | break; |
2095 | case 'O': |
9431620d |
2096 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c |
2097 | goto yes; |
2098 | break; |
2099 | case 'S': |
9431620d |
2100 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c |
2101 | goto yes; |
2102 | break; |
2103 | /* Using ${^...} variables is likely to be sufficiently rare that |
2104 | it seems sensible to avoid the space hit of also checking the |
2105 | length. */ |
2106 | case '\017': /* ${^OPEN} */ |
9431620d |
2107 | if (strEQ(name1, "PEN")) |
b9b0e72c |
2108 | goto yes; |
2109 | break; |
2110 | case '\024': /* ${^TAINT} */ |
9431620d |
2111 | if (strEQ(name1, "AINT")) |
b9b0e72c |
2112 | goto yes; |
2113 | break; |
2114 | case '\025': /* ${^UNICODE} */ |
9431620d |
2115 | if (strEQ(name1, "NICODE")) |
b9b0e72c |
2116 | goto yes; |
a0288114 |
2117 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 |
2118 | goto yes; |
b9b0e72c |
2119 | break; |
2120 | case '\027': /* ${^WARNING_BITS} */ |
9431620d |
2121 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c |
2122 | goto yes; |
2123 | break; |
2124 | case '1': |
2125 | case '2': |
2126 | case '3': |
2127 | case '4': |
2128 | case '5': |
2129 | case '6': |
2130 | case '7': |
2131 | case '8': |
2132 | case '9': |
c9d5ac95 |
2133 | { |
7fc63493 |
2134 | const char *end = name + len; |
c9d5ac95 |
2135 | while (--end > name) { |
2136 | if (!isDIGIT(*end)) |
2137 | return FALSE; |
2138 | } |
b9b0e72c |
2139 | goto yes; |
2140 | } |
2141 | } |
2142 | } else { |
2143 | /* Because we're already assuming that name is NUL terminated |
2144 | below, we can treat an empty name as "\0" */ |
2145 | switch (*name) { |
2146 | case '&': |
2147 | case '`': |
2148 | case '\'': |
2149 | case ':': |
2150 | case '?': |
2151 | case '!': |
2152 | case '-': |
2153 | case '#': |
2154 | case '[': |
2155 | case '^': |
2156 | case '~': |
2157 | case '=': |
2158 | case '%': |
2159 | case '.': |
2160 | case '(': |
2161 | case ')': |
2162 | case '<': |
2163 | case '>': |
2164 | case ',': |
2165 | case '\\': |
2166 | case '/': |
2167 | case '|': |
2168 | case '+': |
2169 | case ';': |
2170 | case ']': |
2171 | case '\001': /* $^A */ |
2172 | case '\003': /* $^C */ |
2173 | case '\004': /* $^D */ |
2174 | case '\005': /* $^E */ |
2175 | case '\006': /* $^F */ |
2176 | case '\010': /* $^H */ |
2177 | case '\011': /* $^I, NOT \t in EBCDIC */ |
2178 | case '\014': /* $^L */ |
2179 | case '\016': /* $^N */ |
2180 | case '\017': /* $^O */ |
2181 | case '\020': /* $^P */ |
2182 | case '\023': /* $^S */ |
2183 | case '\024': /* $^T */ |
2184 | case '\026': /* $^V */ |
2185 | case '\027': /* $^W */ |
2186 | case '1': |
2187 | case '2': |
2188 | case '3': |
2189 | case '4': |
2190 | case '5': |
2191 | case '6': |
2192 | case '7': |
2193 | case '8': |
2194 | case '9': |
2195 | yes: |
2196 | return TRUE; |
2197 | default: |
2198 | break; |
c9d5ac95 |
2199 | } |
c9d5ac95 |
2200 | } |
2201 | return FALSE; |
2202 | } |
66610fdd |
2203 | |
f5c1e807 |
2204 | void |
2205 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) |
2206 | { |
2207 | dVAR; |
acda4c6a |
2208 | U32 hash; |
f5c1e807 |
2209 | |
9f616d01 |
2210 | assert(name); |
f5c1e807 |
2211 | PERL_UNUSED_ARG(flags); |
2212 | |
acda4c6a |
2213 | if (len > I32_MAX) |
2214 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); |
2215 | |
ae8cc45f |
2216 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2217 | unshare_hek(GvNAME_HEK(gv)); |
2218 | } |
2219 | |
acda4c6a |
2220 | PERL_HASH(hash, name, len); |
9f616d01 |
2221 | GvNAME_HEK(gv) = share_hek(name, len, hash); |
f5c1e807 |
2222 | } |
2223 | |
66610fdd |
2224 | /* |
2225 | * Local variables: |
2226 | * c-indentation-style: bsd |
2227 | * c-basic-offset: 4 |
2228 | * indent-tabs-mode: t |
2229 | * End: |
2230 | * |
37442d52 |
2231 | * ex: set ts=8 sts=4 sw=4 noet: |
2232 | */ |