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