Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
4bb101f2 |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
acde74e1 |
4 | * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 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 | { |
97aff369 |
107 | dVAR; |
eacec437 |
108 | char smallbuf[256]; |
53d95988 |
109 | char *tmpbuf; |
8ebc5c01 |
110 | STRLEN tmplen; |
79072805 |
111 | GV *gv; |
112 | |
1d7c1841 |
113 | if (!PL_defstash) |
a0714e2c |
114 | return NULL; |
1d7c1841 |
115 | |
53d95988 |
116 | tmplen = strlen(name) + 2; |
117 | if (tmplen < sizeof smallbuf) |
118 | tmpbuf = smallbuf; |
119 | else |
a02a5408 |
120 | Newx(tmpbuf, tmplen + 1, char); |
0ac0412a |
121 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 |
122 | tmpbuf[0] = '_'; |
123 | tmpbuf[1] = '<'; |
490a0e98 |
124 | memcpy(tmpbuf + 2, name, tmplen - 1); |
3280af22 |
125 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
126 | if (!isGV(gv)) { |
3280af22 |
127 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 |
128 | #ifdef PERL_DONT_CREATE_GVSV |
129 | GvSV(gv) = newSVpvn(name, tmplen - 2); |
130 | #else |
131 | sv_setpvn(GvSV(gv), name, tmplen - 2); |
132 | #endif |
1d7c1841 |
133 | if (PERLDB_LINE) |
a0714e2c |
134 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); |
1d7c1841 |
135 | } |
53d95988 |
136 | if (tmpbuf != smallbuf) |
137 | Safefree(tmpbuf); |
79072805 |
138 | return gv; |
139 | } |
140 | |
62d55b22 |
141 | /* |
142 | =for apidoc gv_const_sv |
143 | |
144 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for |
145 | inlining, or C<gv> is a placeholder reference that would be promoted to such |
146 | a typeglob, then returns the value returned by the sub. Otherwise, returns |
147 | NULL. |
148 | |
149 | =cut |
150 | */ |
151 | |
152 | SV * |
153 | Perl_gv_const_sv(pTHX_ GV *gv) |
154 | { |
155 | if (SvTYPE(gv) == SVt_PVGV) |
156 | return cv_const_sv(GvCVu(gv)); |
157 | return SvROK(gv) ? SvRV(gv) : NULL; |
158 | } |
159 | |
12816592 |
160 | GP * |
161 | Perl_newGP(pTHX_ GV *const gv) |
162 | { |
163 | GP *gp; |
666ea192 |
164 | const char *const file = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; |
f4890806 |
165 | STRLEN len = strlen(file); |
166 | U32 hash; |
167 | |
168 | PERL_HASH(hash, file, len); |
169 | |
12816592 |
170 | Newxz(gp, 1, GP); |
171 | |
172 | #ifndef PERL_DONT_CREATE_GVSV |
173 | gp->gv_sv = newSV(0); |
174 | #endif |
175 | |
176 | gp->gp_line = CopLINE(PL_curcop); |
177 | /* XXX Ideally this cast would be replaced with a change to const char* |
178 | in the struct. */ |
f4890806 |
179 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 |
180 | gp->gp_egv = gv; |
181 | gp->gp_refcnt = 1; |
182 | |
183 | return gp; |
184 | } |
185 | |
463ee0b2 |
186 | void |
864dbfa3 |
187 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
188 | { |
27da23d5 |
189 | dVAR; |
3b6733bf |
190 | const U32 old_type = SvTYPE(gv); |
191 | const bool doproto = old_type > SVt_NULL; |
b15aece3 |
192 | const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL; |
756cb477 |
193 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
194 | |
195 | assert (!(proto && has_constant)); |
196 | |
197 | if (has_constant) { |
5c1f4d79 |
198 | /* The constant has to be a simple scalar type. */ |
199 | switch (SvTYPE(has_constant)) { |
200 | case SVt_PVAV: |
201 | case SVt_PVHV: |
202 | case SVt_PVCV: |
203 | case SVt_PVFM: |
204 | case SVt_PVIO: |
205 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", |
206 | sv_reftype(has_constant, 0)); |
42d0e0b7 |
207 | default: NOOP; |
5c1f4d79 |
208 | } |
756cb477 |
209 | SvRV_set(gv, NULL); |
210 | SvROK_off(gv); |
211 | } |
463ee0b2 |
212 | |
3b6733bf |
213 | |
214 | if (old_type < SVt_PVGV) { |
215 | if (old_type >= SVt_PV) |
216 | SvCUR_set(gv, 0); |
217 | sv_upgrade((SV*)gv, SVt_PVGV); |
218 | } |
55d729e4 |
219 | if (SvLEN(gv)) { |
220 | if (proto) { |
f880fe2f |
221 | SvPV_set(gv, NULL); |
b162af07 |
222 | SvLEN_set(gv, 0); |
55d729e4 |
223 | SvPOK_off(gv); |
224 | } else |
94010e71 |
225 | Safefree(SvPVX_mutable(gv)); |
55d729e4 |
226 | } |
f7877b28 |
227 | SvSCREAM_on(gv); |
12816592 |
228 | |
229 | GvGP(gv) = Perl_newGP(aTHX_ gv); |
e15faf7d |
230 | GvSTASH(gv) = stash; |
231 | if (stash) |
232 | Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv); |
ae8cc45f |
233 | gv_name_set(gv, name, len, GV_ADD); |
23ad5bf5 |
234 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
235 | GvMULTI_on(gv); |
55d729e4 |
236 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
237 | SvIOK_off(gv); |
55d729e4 |
238 | ENTER; |
756cb477 |
239 | if (has_constant) { |
240 | /* newCONSTSUB takes ownership of the reference from us. */ |
241 | GvCV(gv) = newCONSTSUB(stash, name, has_constant); |
242 | } else { |
243 | /* XXX unsafe for threads if eval_owner isn't held */ |
244 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
245 | GvCV(gv) = PL_compcv; |
246 | } |
55d729e4 |
247 | LEAVE; |
248 | |
3280af22 |
249 | PL_sub_generation++; |
65c50114 |
250 | CvGV(GvCV(gv)) = gv; |
e0d088d0 |
251 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 |
252 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
253 | if (proto) { |
254 | sv_setpv((SV*)GvCV(gv), proto); |
255 | Safefree(proto); |
256 | } |
257 | } |
463ee0b2 |
258 | } |
259 | |
76e3520e |
260 | STATIC void |
cea2e8a9 |
261 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
262 | { |
263 | switch (sv_type) { |
264 | case SVt_PVIO: |
265 | (void)GvIOn(gv); |
266 | break; |
267 | case SVt_PVAV: |
268 | (void)GvAVn(gv); |
269 | break; |
270 | case SVt_PVHV: |
271 | (void)GvHVn(gv); |
272 | break; |
c69033f2 |
273 | #ifdef PERL_DONT_CREATE_GVSV |
274 | case SVt_NULL: |
275 | case SVt_PVCV: |
276 | case SVt_PVFM: |
e654831b |
277 | case SVt_PVGV: |
c69033f2 |
278 | break; |
279 | default: |
280 | (void)GvSVn(gv); |
281 | #endif |
a0d0e21e |
282 | } |
283 | } |
284 | |
954c1994 |
285 | /* |
286 | =for apidoc gv_fetchmeth |
287 | |
288 | Returns the glob with the given C<name> and a defined subroutine or |
289 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
290 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
291 | |
292 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
293 | side-effect creates a glob with the given C<name> in the given C<stash> |
294 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
295 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
296 | |
297 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
298 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
299 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
300 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
301 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
302 | |
303 | =cut |
304 | */ |
305 | |
79072805 |
306 | GV * |
864dbfa3 |
307 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
308 | { |
97aff369 |
309 | dVAR; |
79072805 |
310 | AV* av; |
463ee0b2 |
311 | GV* topgv; |
79072805 |
312 | GV* gv; |
463ee0b2 |
313 | GV** gvp; |
748a9306 |
314 | CV* cv; |
bfcb3514 |
315 | const char *hvname; |
10edeb5d |
316 | HV* lastchance = NULL; |
a0d0e21e |
317 | |
af09ea45 |
318 | /* UNIVERSAL methods should be callable without a stash */ |
319 | if (!stash) { |
320 | level = -1; /* probably appropriate */ |
89529cee |
321 | if(!(stash = gv_stashpvs("UNIVERSAL", FALSE))) |
af09ea45 |
322 | return 0; |
323 | } |
324 | |
bfcb3514 |
325 | hvname = HvNAME_get(stash); |
326 | if (!hvname) |
e27ad1f2 |
327 | Perl_croak(aTHX_ |
328 | "Can't use anonymous symbol table for method lookup"); |
329 | |
44a8e56a |
330 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
331 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
bfcb3514 |
332 | name, hvname); |
463ee0b2 |
333 | |
bfcb3514 |
334 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a |
335 | |
336 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
337 | if (!gvp) |
a0714e2c |
338 | topgv = NULL; |
44a8e56a |
339 | else { |
340 | topgv = *gvp; |
341 | if (SvTYPE(topgv) != SVt_PVGV) |
342 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
343 | if ((cv = GvCV(topgv))) { |
44a8e56a |
344 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
345 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
346 | return topgv; |
44a8e56a |
347 | /* Stale cached entry: junk it */ |
348 | SvREFCNT_dec(cv); |
601f1833 |
349 | GvCV(topgv) = cv = NULL; |
44a8e56a |
350 | GvCVGEN(topgv) = 0; |
748a9306 |
351 | } |
3280af22 |
352 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
353 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
354 | } |
79072805 |
355 | |
017a3ce5 |
356 | gvp = (GV**)hv_fetchs(stash, "ISA", FALSE); |
7d49f689 |
357 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : NULL; |
9607fc9c |
358 | |
fb73857a |
359 | /* create and re-create @.*::SUPER::ISA on demand */ |
360 | if (!av || !SvMAGIC(av)) { |
7423f6db |
361 | STRLEN packlen = HvNAMELEN_get(stash); |
9607fc9c |
362 | |
bfcb3514 |
363 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { |
9607fc9c |
364 | HV* basestash; |
365 | |
366 | packlen -= 7; |
bfcb3514 |
367 | basestash = gv_stashpvn(hvname, packlen, TRUE); |
017a3ce5 |
368 | gvp = (GV**)hv_fetchs(basestash, "ISA", FALSE); |
3280af22 |
369 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
017a3ce5 |
370 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); |
9607fc9c |
371 | if (!gvp || !(gv = *gvp)) |
bfcb3514 |
372 | Perl_croak(aTHX_ "Cannot create %s::ISA", hvname); |
9607fc9c |
373 | if (SvTYPE(gv) != SVt_PVGV) |
374 | gv_init(gv, stash, "ISA", 3, TRUE); |
375 | SvREFCNT_dec(GvAV(gv)); |
b37c2d43 |
376 | GvAV(gv) = (AV*)SvREFCNT_inc_simple(av); |
9607fc9c |
377 | } |
378 | } |
379 | } |
380 | |
381 | if (av) { |
79072805 |
382 | SV** svp = AvARRAY(av); |
93965878 |
383 | /* NOTE: No support for tied ISA */ |
384 | I32 items = AvFILLp(av) + 1; |
79072805 |
385 | while (items--) { |
823a54a3 |
386 | SV* const sv = *svp++; |
387 | HV* const basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
388 | if (!basestash) { |
599cee73 |
389 | if (ckWARN(WARN_MISC)) |
35c1215d |
390 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA", |
95b63a38 |
391 | (void*)sv, hvname); |
79072805 |
392 | continue; |
393 | } |
44a8e56a |
394 | gv = gv_fetchmeth(basestash, name, len, |
395 | (level >= 0) ? level + 1 : level - 1); |
396 | if (gv) |
397 | goto gotcha; |
79072805 |
398 | } |
399 | } |
a0d0e21e |
400 | |
9607fc9c |
401 | /* if at top level, try UNIVERSAL */ |
402 | |
44a8e56a |
403 | if (level == 0 || level == -1) { |
10edeb5d |
404 | lastchance = gv_stashpvs("UNIVERSAL", FALSE); |
9607fc9c |
405 | |
823a54a3 |
406 | if (lastchance) { |
155aba94 |
407 | if ((gv = gv_fetchmeth(lastchance, name, len, |
408 | (level >= 0) ? level + 1 : level - 1))) |
409 | { |
44a8e56a |
410 | gotcha: |
dc848c6f |
411 | /* |
412 | * Cache method in topgv if: |
413 | * 1. topgv has no synonyms (else inheritance crosses wires) |
414 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
415 | */ |
416 | if (topgv && |
417 | GvREFCNT(topgv) == 1 && |
418 | (cv = GvCV(gv)) && |
419 | (CvROOT(cv) || CvXSUB(cv))) |
420 | { |
155aba94 |
421 | if ((cv = GvCV(topgv))) |
44a8e56a |
422 | SvREFCNT_dec(cv); |
423 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
424 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
425 | } |
a0d0e21e |
426 | return gv; |
427 | } |
005a453c |
428 | else if (topgv && GvREFCNT(topgv) == 1) { |
429 | /* cache the fact that the method is not defined */ |
3280af22 |
430 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
431 | } |
a0d0e21e |
432 | } |
433 | } |
434 | |
79072805 |
435 | return 0; |
436 | } |
437 | |
954c1994 |
438 | /* |
611c1e95 |
439 | =for apidoc gv_fetchmeth_autoload |
440 | |
441 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. |
442 | Returns a glob for the subroutine. |
443 | |
444 | For an autoloaded subroutine without a GV, will create a GV even |
445 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() |
446 | of the result may be zero. |
447 | |
448 | =cut |
449 | */ |
450 | |
451 | GV * |
452 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
453 | { |
454 | GV *gv = gv_fetchmeth(stash, name, len, level); |
455 | |
456 | if (!gv) { |
611c1e95 |
457 | CV *cv; |
458 | GV **gvp; |
459 | |
460 | if (!stash) |
6136c704 |
461 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
5c7983e5 |
462 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
6136c704 |
463 | return NULL; |
5c7983e5 |
464 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 |
465 | return NULL; |
611c1e95 |
466 | cv = GvCV(gv); |
467 | if (!(CvROOT(cv) || CvXSUB(cv))) |
6136c704 |
468 | return NULL; |
611c1e95 |
469 | /* Have an autoload */ |
470 | if (level < 0) /* Cannot do without a stub */ |
471 | gv_fetchmeth(stash, name, len, 0); |
472 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
473 | if (!gvp) |
6136c704 |
474 | return NULL; |
611c1e95 |
475 | return *gvp; |
476 | } |
477 | return gv; |
478 | } |
479 | |
480 | /* |
954c1994 |
481 | =for apidoc gv_fetchmethod_autoload |
482 | |
483 | Returns the glob which contains the subroutine to call to invoke the method |
484 | on the C<stash>. In fact in the presence of autoloading this may be the |
485 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
486 | already setup. |
954c1994 |
487 | |
488 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
489 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
490 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
491 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
492 | with a non-zero C<autoload> parameter. |
954c1994 |
493 | |
494 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
495 | that if you want to keep the returned glob for a long time, you need to |
496 | check for it being "AUTOLOAD", since at the later time the call may load a |
497 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
498 | created via a side effect to do this. |
954c1994 |
499 | |
500 | These functions have the same side-effects and as C<gv_fetchmeth> with |
501 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
502 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
503 | C<call_sv> apply equally to these functions. |
954c1994 |
504 | |
505 | =cut |
506 | */ |
507 | |
dc848c6f |
508 | GV * |
864dbfa3 |
509 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
510 | { |
97aff369 |
511 | dVAR; |
08105a92 |
512 | register const char *nend; |
c445ea15 |
513 | const char *nsplit = NULL; |
a0d0e21e |
514 | GV* gv; |
0dae17bd |
515 | HV* ostash = stash; |
516 | |
517 | if (stash && SvTYPE(stash) < SVt_PVHV) |
5c284bb0 |
518 | stash = NULL; |
b267980d |
519 | |
463ee0b2 |
520 | for (nend = name; *nend; nend++) { |
9607fc9c |
521 | if (*nend == '\'') |
a0d0e21e |
522 | nsplit = nend; |
9607fc9c |
523 | else if (*nend == ':' && *(nend + 1) == ':') |
524 | nsplit = ++nend; |
a0d0e21e |
525 | } |
526 | if (nsplit) { |
9d4ba2ae |
527 | const char * const origname = name; |
a0d0e21e |
528 | name = nsplit + 1; |
a0d0e21e |
529 | if (*nsplit == ':') |
530 | --nsplit; |
9607fc9c |
531 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
532 | /* ->SUPER::method should really be looked up in original stash */ |
b37c2d43 |
533 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
534 | CopSTASHPV(PL_curcop))); |
af09ea45 |
535 | /* __PACKAGE__::SUPER stash should be autovivified */ |
b15aece3 |
536 | stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
537 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 |
538 | origname, HvNAME_get(stash), name) ); |
4633a7c4 |
539 | } |
e189a56d |
540 | else { |
af09ea45 |
541 | /* don't autovifify if ->NoSuchStash::method */ |
542 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); |
e189a56d |
543 | |
544 | /* however, explicit calls to Pkg::SUPER::method may |
545 | happen, and may require autovivification to work */ |
546 | if (!stash && (nsplit - origname) >= 7 && |
547 | strnEQ(nsplit - 7, "::SUPER", 7) && |
548 | gv_stashpvn(origname, nsplit - origname - 7, FALSE)) |
549 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
550 | } |
0dae17bd |
551 | ostash = stash; |
4633a7c4 |
552 | } |
553 | |
9607fc9c |
554 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
555 | if (!gv) { |
2f6e0fe7 |
556 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
557 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
558 | else if (autoload) |
0dae17bd |
559 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 |
560 | } |
dc848c6f |
561 | else if (autoload) { |
9d4ba2ae |
562 | CV* const cv = GvCV(gv); |
09280a33 |
563 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
564 | GV* stubgv; |
565 | GV* autogv; |
566 | |
567 | if (CvANON(cv)) |
568 | stubgv = gv; |
569 | else { |
570 | stubgv = CvGV(cv); |
571 | if (GvCV(stubgv) != cv) /* orphaned import */ |
572 | stubgv = gv; |
573 | } |
574 | autogv = gv_autoload4(GvSTASH(stubgv), |
575 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
576 | if (autogv) |
577 | gv = autogv; |
578 | } |
579 | } |
44a8e56a |
580 | |
581 | return gv; |
582 | } |
583 | |
584 | GV* |
864dbfa3 |
585 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
586 | { |
27da23d5 |
587 | dVAR; |
44a8e56a |
588 | GV* gv; |
589 | CV* cv; |
590 | HV* varstash; |
591 | GV* vargv; |
592 | SV* varsv; |
e1ec3a88 |
593 | const char *packname = ""; |
eae70eaa |
594 | STRLEN packname_len = 0; |
44a8e56a |
595 | |
5c7983e5 |
596 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
a0714e2c |
597 | return NULL; |
0dae17bd |
598 | if (stash) { |
599 | if (SvTYPE(stash) < SVt_PVHV) { |
e62f0680 |
600 | packname = SvPV_const((SV*)stash, packname_len); |
5c284bb0 |
601 | stash = NULL; |
0dae17bd |
602 | } |
603 | else { |
bfcb3514 |
604 | packname = HvNAME_get(stash); |
7423f6db |
605 | packname_len = HvNAMELEN_get(stash); |
0dae17bd |
606 | } |
607 | } |
5c7983e5 |
608 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c |
609 | return NULL; |
dc848c6f |
610 | cv = GvCV(gv); |
611 | |
adb5a9ae |
612 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c |
613 | return NULL; |
ed850460 |
614 | |
dc848c6f |
615 | /* |
616 | * Inheriting AUTOLOAD for non-methods works ... for now. |
617 | */ |
041457d9 |
618 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
619 | && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) |
620 | ) |
12bcd1a6 |
621 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f |
622 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd |
623 | packname, (int)len, name); |
44a8e56a |
624 | |
aed2304a |
625 | if (CvISXSUB(cv)) { |
adb5a9ae |
626 | /* rather than lookup/init $AUTOLOAD here |
627 | * only to have the XSUB do another lookup for $AUTOLOAD |
628 | * and split that value on the last '::', |
629 | * pass along the same data via some unused fields in the CV |
630 | */ |
631 | CvSTASH(cv) = stash; |
f880fe2f |
632 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 |
633 | SvCUR_set(cv, len); |
adb5a9ae |
634 | return gv; |
635 | } |
adb5a9ae |
636 | |
44a8e56a |
637 | /* |
638 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
639 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
640 | * use that, but for lack of anything better we will use the sub's |
641 | * original package to look up $AUTOLOAD. |
642 | */ |
643 | varstash = GvSTASH(CvGV(cv)); |
5c7983e5 |
644 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b |
645 | ENTER; |
646 | |
c69033f2 |
647 | if (!isGV(vargv)) { |
5c7983e5 |
648 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 |
649 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 |
650 | GvSV(vargv) = newSV(0); |
c69033f2 |
651 | #endif |
652 | } |
3d35f11b |
653 | LEAVE; |
e203899d |
654 | varsv = GvSVn(vargv); |
7423f6db |
655 | sv_setpvn(varsv, packname, packname_len); |
396482e1 |
656 | sv_catpvs(varsv, "::"); |
44a8e56a |
657 | sv_catpvn(varsv, name, len); |
a0d0e21e |
658 | return gv; |
659 | } |
660 | |
d2c93421 |
661 | /* The "gv" parameter should be the glob known to Perl code as *! |
662 | * The scalar must already have been magicalized. |
663 | */ |
664 | STATIC void |
665 | S_require_errno(pTHX_ GV *gv) |
666 | { |
27da23d5 |
667 | dVAR; |
89529cee |
668 | HV* stash = gv_stashpvs("Errno", FALSE); |
d2c93421 |
669 | |
a0288114 |
670 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
d2c93421 |
671 | dSP; |
672 | PUTBACK; |
673 | ENTER; |
674 | save_scalar(gv); /* keep the value of $! */ |
84f1fa11 |
675 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
a0714e2c |
676 | newSVpvs("Errno"), NULL); |
d2c93421 |
677 | LEAVE; |
678 | SPAGAIN; |
89529cee |
679 | stash = gv_stashpvs("Errno", FALSE); |
d2c93421 |
680 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
681 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
682 | } |
683 | } |
684 | |
954c1994 |
685 | /* |
686 | =for apidoc gv_stashpv |
687 | |
386d01d6 |
688 | Returns a pointer to the stash for a specified package. C<name> should |
bc96cb06 |
689 | be a valid UTF-8 string and must be null-terminated. If C<create> is set |
690 | then the package will be created if it does not already exist. If C<create> |
691 | is not set and the package does not exist then NULL is returned. |
954c1994 |
692 | |
693 | =cut |
694 | */ |
695 | |
a0d0e21e |
696 | HV* |
864dbfa3 |
697 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
698 | { |
dc437b57 |
699 | return gv_stashpvn(name, strlen(name), create); |
700 | } |
701 | |
bc96cb06 |
702 | /* |
703 | =for apidoc gv_stashpvn |
704 | |
705 | Returns a pointer to the stash for a specified package. C<name> should |
706 | be a valid UTF-8 string. The C<namelen> parameter indicates the length of |
707 | the C<name>, in bytes. If C<create> is set then the package will be |
708 | created if it does not already exist. If C<create> is not set and the |
709 | package does not exist then NULL is returned. |
710 | |
711 | =cut |
712 | */ |
713 | |
dc437b57 |
714 | HV* |
864dbfa3 |
715 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
716 | { |
0cea0058 |
717 | char smallbuf[128]; |
46fc3d4c |
718 | char *tmpbuf; |
a0d0e21e |
719 | HV *stash; |
720 | GV *tmpgv; |
dc437b57 |
721 | |
46fc3d4c |
722 | if (namelen + 3 < sizeof smallbuf) |
723 | tmpbuf = smallbuf; |
724 | else |
a02a5408 |
725 | Newx(tmpbuf, namelen + 3, char); |
dc437b57 |
726 | Copy(name,tmpbuf,namelen,char); |
727 | tmpbuf[namelen++] = ':'; |
728 | tmpbuf[namelen++] = ':'; |
729 | tmpbuf[namelen] = '\0'; |
9fb9dfd8 |
730 | tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, create, SVt_PVHV); |
46fc3d4c |
731 | if (tmpbuf != smallbuf) |
732 | Safefree(tmpbuf); |
a0d0e21e |
733 | if (!tmpgv) |
734 | return 0; |
735 | if (!GvHV(tmpgv)) |
736 | GvHV(tmpgv) = newHV(); |
737 | stash = GvHV(tmpgv); |
bfcb3514 |
738 | if (!HvNAME_get(stash)) |
51a37f80 |
739 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e |
740 | return stash; |
463ee0b2 |
741 | } |
742 | |
954c1994 |
743 | /* |
744 | =for apidoc gv_stashsv |
745 | |
386d01d6 |
746 | Returns a pointer to the stash for a specified package, which must be a |
747 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
748 | |
749 | =cut |
750 | */ |
751 | |
a0d0e21e |
752 | HV* |
864dbfa3 |
753 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
754 | { |
dc437b57 |
755 | STRLEN len; |
9d4ba2ae |
756 | const char * const ptr = SvPV_const(sv,len); |
dc437b57 |
757 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
758 | } |
759 | |
760 | |
463ee0b2 |
761 | GV * |
7a5fd60d |
762 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { |
b7787f18 |
763 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d |
764 | } |
765 | |
766 | GV * |
767 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) { |
768 | STRLEN len; |
9d4ba2ae |
769 | const char * const nambeg = SvPV_const(name, len); |
7a5fd60d |
770 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
771 | } |
772 | |
773 | GV * |
774 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, |
775 | I32 sv_type) |
79072805 |
776 | { |
97aff369 |
777 | dVAR; |
08105a92 |
778 | register const char *name = nambeg; |
c445ea15 |
779 | register GV *gv = NULL; |
79072805 |
780 | GV**gvp; |
79072805 |
781 | I32 len; |
b3d904f3 |
782 | register const char *name_cursor; |
c445ea15 |
783 | HV *stash = NULL; |
add2581e |
784 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a |
785 | const I32 no_expand = flags & GV_NOEXPAND; |
fafc274c |
786 | const I32 add = |
787 | flags & ~SVf_UTF8 & ~GV_NOADD_NOINIT & ~GV_NOEXPAND & ~GV_NOTQUAL; |
b3d904f3 |
788 | const char *const name_end = nambeg + full_len; |
789 | const char *const name_em1 = name_end - 1; |
79072805 |
790 | |
fafc274c |
791 | if (flags & GV_NOTQUAL) { |
792 | /* Caller promised that there is no stash, so we can skip the check. */ |
793 | len = full_len; |
794 | goto no_stash; |
795 | } |
796 | |
b208e10c |
797 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
798 | /* accidental stringify on a GV? */ |
c07a80fd |
799 | name++; |
b208e10c |
800 | } |
c07a80fd |
801 | |
b3d904f3 |
802 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
803 | if ((*name_cursor == ':' && name_cursor < name_em1 |
804 | && name_cursor[1] == ':') |
805 | || (*name_cursor == '\'' && name_cursor[1])) |
463ee0b2 |
806 | { |
463ee0b2 |
807 | if (!stash) |
3280af22 |
808 | stash = PL_defstash; |
dc437b57 |
809 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
810 | return NULL; |
463ee0b2 |
811 | |
b3d904f3 |
812 | len = name_cursor - name; |
85e6fe83 |
813 | if (len > 0) { |
0cea0058 |
814 | char smallbuf[128]; |
62b57502 |
815 | char *tmpbuf; |
62b57502 |
816 | |
bb7a0f54 |
817 | if (len + 3 < (I32)sizeof (smallbuf)) |
3c78fafa |
818 | tmpbuf = smallbuf; |
62b57502 |
819 | else |
a02a5408 |
820 | Newx(tmpbuf, len+3, char); |
a0d0e21e |
821 | Copy(name, tmpbuf, len, char); |
822 | tmpbuf[len++] = ':'; |
823 | tmpbuf[len++] = ':'; |
824 | tmpbuf[len] = '\0'; |
463ee0b2 |
825 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
a0714e2c |
826 | gv = gvp ? *gvp : NULL; |
3280af22 |
827 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
828 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
829 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
830 | else |
831 | GvMULTI_on(gv); |
832 | } |
3c78fafa |
833 | if (tmpbuf != smallbuf) |
62b57502 |
834 | Safefree(tmpbuf); |
3280af22 |
835 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0714e2c |
836 | return NULL; |
85e6fe83 |
837 | |
463ee0b2 |
838 | if (!(stash = GvHV(gv))) |
839 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
840 | |
bfcb3514 |
841 | if (!HvNAME_get(stash)) |
b3d904f3 |
842 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); |
463ee0b2 |
843 | } |
844 | |
b3d904f3 |
845 | if (*name_cursor == ':') |
846 | name_cursor++; |
847 | name_cursor++; |
848 | name = name_cursor; |
ad6bfa9d |
849 | if (name == name_end) |
017a3ce5 |
850 | return gv ? gv : (GV*)*hv_fetchs(PL_defstash, "main::", TRUE); |
79072805 |
851 | } |
79072805 |
852 | } |
b3d904f3 |
853 | len = name_cursor - name; |
463ee0b2 |
854 | |
855 | /* No stash in name, so see how we can default */ |
856 | |
857 | if (!stash) { |
fafc274c |
858 | no_stash: |
8ccce9ae |
859 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c |
860 | bool global = FALSE; |
861 | |
8ccce9ae |
862 | switch (len) { |
863 | case 1: |
18ea00d7 |
864 | if (*name == '_') |
9d116dd7 |
865 | global = TRUE; |
18ea00d7 |
866 | break; |
8ccce9ae |
867 | case 3: |
868 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') |
869 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') |
870 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) |
9d116dd7 |
871 | global = TRUE; |
18ea00d7 |
872 | break; |
8ccce9ae |
873 | case 4: |
874 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
875 | && name[3] == 'V') |
9d116dd7 |
876 | global = TRUE; |
18ea00d7 |
877 | break; |
8ccce9ae |
878 | case 5: |
879 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' |
880 | && name[3] == 'I' && name[4] == 'N') |
463ee0b2 |
881 | global = TRUE; |
18ea00d7 |
882 | break; |
8ccce9ae |
883 | case 6: |
884 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') |
885 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') |
886 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) |
887 | global = TRUE; |
888 | break; |
889 | case 7: |
890 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
891 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' |
892 | && name[6] == 'T') |
18ea00d7 |
893 | global = TRUE; |
894 | break; |
463ee0b2 |
895 | } |
9607fc9c |
896 | |
463ee0b2 |
897 | if (global) |
3280af22 |
898 | stash = PL_defstash; |
923e4eb5 |
899 | else if (IN_PERL_COMPILETIME) { |
3280af22 |
900 | stash = PL_curstash; |
901 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
902 | sv_type != SVt_PVCV && |
903 | sv_type != SVt_PVGV && |
4633a7c4 |
904 | sv_type != SVt_PVFM && |
c07a80fd |
905 | sv_type != SVt_PVIO && |
70ec6265 |
906 | !(len == 1 && sv_type == SVt_PV && |
907 | (*name == 'a' || *name == 'b')) ) |
748a9306 |
908 | { |
4633a7c4 |
909 | gvp = (GV**)hv_fetch(stash,name,len,0); |
910 | if (!gvp || |
3280af22 |
911 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
912 | SvTYPE(*gvp) != SVt_PVGV) |
913 | { |
d4c19fe8 |
914 | stash = NULL; |
a5f75d66 |
915 | } |
155aba94 |
916 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
917 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
918 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
919 | { |
cea2e8a9 |
920 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
921 | sv_type == SVt_PVAV ? '@' : |
922 | sv_type == SVt_PVHV ? '%' : '$', |
923 | name); |
8ebc5c01 |
924 | if (GvCVu(*gvp)) |
cc507455 |
925 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
d4c19fe8 |
926 | stash = NULL; |
4633a7c4 |
927 | } |
a0d0e21e |
928 | } |
85e6fe83 |
929 | } |
463ee0b2 |
930 | else |
1d7c1841 |
931 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
932 | } |
933 | else |
3280af22 |
934 | stash = PL_defstash; |
463ee0b2 |
935 | } |
936 | |
937 | /* By this point we should have a stash and a name */ |
938 | |
a0d0e21e |
939 | if (!stash) { |
5a844595 |
940 | if (add) { |
9d4ba2ae |
941 | SV * const err = Perl_mess(aTHX_ |
5a844595 |
942 | "Global symbol \"%s%s\" requires explicit package name", |
943 | (sv_type == SVt_PV ? "$" |
944 | : sv_type == SVt_PVAV ? "@" |
945 | : sv_type == SVt_PVHV ? "%" |
608b3986 |
946 | : ""), name); |
e7f343b6 |
947 | GV *gv; |
608b3986 |
948 | if (USE_UTF8_IN_NAMES) |
949 | SvUTF8_on(err); |
950 | qerror(err); |
e7f343b6 |
951 | gv = gv_fetchpvn_flags("<none>::", 8, GV_ADDMULTI, SVt_PVHV); |
952 | if(!gv) { |
953 | /* symbol table under destruction */ |
954 | return NULL; |
955 | } |
956 | stash = GvHV(gv); |
a0d0e21e |
957 | } |
d7aacf4e |
958 | else |
a0714e2c |
959 | return NULL; |
a0d0e21e |
960 | } |
961 | |
962 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
963 | return NULL; |
a0d0e21e |
964 | |
79072805 |
965 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
966 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
a0714e2c |
967 | return NULL; |
79072805 |
968 | gv = *gvp; |
969 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
970 | if (add) { |
a5f75d66 |
971 | GvMULTI_on(gv); |
a0d0e21e |
972 | gv_init_sv(gv, sv_type); |
d2c93421 |
973 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
974 | require_errno(gv); |
a0d0e21e |
975 | } |
79072805 |
976 | return gv; |
add2581e |
977 | } else if (no_init) { |
55d729e4 |
978 | return gv; |
e26df76a |
979 | } else if (no_expand && SvROK(gv)) { |
980 | return gv; |
79072805 |
981 | } |
93a17b20 |
982 | |
983 | /* Adding a new symbol */ |
984 | |
0453d815 |
985 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d |
986 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 |
987 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
988 | gv_init_sv(gv, sv_type); |
93a17b20 |
989 | |
a0288114 |
990 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d |
991 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
992 | GvMULTI_on(gv) ; |
993 | |
93a17b20 |
994 | /* set up magic where warranted */ |
cc4c2da6 |
995 | if (len > 1) { |
9431620d |
996 | #ifndef EBCDIC |
cc4c2da6 |
997 | if (*name > 'V' ) { |
6f207bd3 |
998 | NOOP; |
cc4c2da6 |
999 | /* Nothing else to do. |
91f565cb |
1000 | The compiler will probably turn the switch statement into a |
cc4c2da6 |
1001 | branch table. Make sure we avoid even that small overhead for |
1002 | the common case of lower case variable names. */ |
9431620d |
1003 | } else |
1004 | #endif |
1005 | { |
b464bac0 |
1006 | const char * const name2 = name + 1; |
cc4c2da6 |
1007 | switch (*name) { |
1008 | case 'A': |
1009 | if (strEQ(name2, "RGV")) { |
1010 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
1011 | } |
7b8203e3 |
1012 | else if (strEQ(name2, "RGVOUT")) { |
1013 | GvMULTI_on(gv); |
1014 | } |
cc4c2da6 |
1015 | break; |
1016 | case 'E': |
1017 | if (strnEQ(name2, "XPORT", 5)) |
1018 | GvMULTI_on(gv); |
1019 | break; |
1020 | case 'I': |
1021 | if (strEQ(name2, "SA")) { |
9d4ba2ae |
1022 | AV* const av = GvAVn(gv); |
cc4c2da6 |
1023 | GvMULTI_on(gv); |
bd61b366 |
1024 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, NULL, 0); |
cc4c2da6 |
1025 | /* NOTE: No support for tied ISA */ |
1026 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
1027 | && AvFILLp(av) == -1) |
1028 | { |
e1ec3a88 |
1029 | const char *pname; |
cc4c2da6 |
1030 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
1031 | gv_stashpvn(pname, 9, TRUE); |
1032 | av_push(av, newSVpvn(pname = "DB_File",7)); |
1033 | gv_stashpvn(pname, 7, TRUE); |
1034 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
1035 | gv_stashpvn(pname, 9, TRUE); |
1036 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
1037 | gv_stashpvn(pname, 9, TRUE); |
1038 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
1039 | gv_stashpvn(pname, 9, TRUE); |
1040 | } |
1041 | } |
1042 | break; |
1043 | case 'O': |
1044 | if (strEQ(name2, "VERLOAD")) { |
9d4ba2ae |
1045 | HV* const hv = GvHVn(gv); |
cc4c2da6 |
1046 | GvMULTI_on(gv); |
a0714e2c |
1047 | hv_magic(hv, NULL, PERL_MAGIC_overload); |
cc4c2da6 |
1048 | } |
1049 | break; |
1050 | case 'S': |
1051 | if (strEQ(name2, "IG")) { |
1052 | HV *hv; |
1053 | I32 i; |
1054 | if (!PL_psig_ptr) { |
a02a5408 |
1055 | Newxz(PL_psig_ptr, SIG_SIZE, SV*); |
1056 | Newxz(PL_psig_name, SIG_SIZE, SV*); |
1057 | Newxz(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 |
1058 | } |
1059 | GvMULTI_on(gv); |
1060 | hv = GvHVn(gv); |
a0714e2c |
1061 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 |
1062 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 |
1063 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 |
1064 | if (init) |
1065 | sv_setsv(*init, &PL_sv_undef); |
1066 | PL_psig_ptr[i] = 0; |
1067 | PL_psig_name[i] = 0; |
1068 | PL_psig_pend[i] = 0; |
1069 | } |
1070 | } |
1071 | break; |
1072 | case 'V': |
1073 | if (strEQ(name2, "ERSION")) |
1074 | GvMULTI_on(gv); |
1075 | break; |
e5218da5 |
1076 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1077 | if (strEQ(name2, "HILD_ERROR_NATIVE")) |
1078 | goto magicalize; |
1079 | break; |
cc4c2da6 |
1080 | case '\005': /* $^ENCODING */ |
1081 | if (strEQ(name2, "NCODING")) |
1082 | goto magicalize; |
1083 | break; |
1084 | case '\017': /* $^OPEN */ |
1085 | if (strEQ(name2, "PEN")) |
1086 | goto magicalize; |
1087 | break; |
1088 | case '\024': /* ${^TAINT} */ |
1089 | if (strEQ(name2, "AINT")) |
1090 | goto ro_magicalize; |
1091 | break; |
7cebcbc0 |
1092 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 |
1093 | if (strEQ(name2, "NICODE")) |
cc4c2da6 |
1094 | goto ro_magicalize; |
a0288114 |
1095 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 |
1096 | goto ro_magicalize; |
e07ea26a |
1097 | if (strEQ(name2, "TF8CACHE")) |
1098 | goto magicalize; |
cc4c2da6 |
1099 | break; |
1100 | case '\027': /* $^WARNING_BITS */ |
1101 | if (strEQ(name2, "ARNING_BITS")) |
1102 | goto magicalize; |
1103 | break; |
1104 | case '1': |
1105 | case '2': |
1106 | case '3': |
1107 | case '4': |
1108 | case '5': |
1109 | case '6': |
1110 | case '7': |
1111 | case '8': |
1112 | case '9': |
85e6fe83 |
1113 | { |
cc4c2da6 |
1114 | /* ensures variable is only digits */ |
1115 | /* ${"1foo"} fails this test (and is thus writeable) */ |
1116 | /* added by japhy, but borrowed from is_gv_magical */ |
1117 | const char *end = name + len; |
1118 | while (--end > name) { |
1119 | if (!isDIGIT(*end)) return gv; |
1120 | } |
1121 | goto ro_magicalize; |
1d7c1841 |
1122 | } |
dc437b57 |
1123 | } |
93a17b20 |
1124 | } |
392db708 |
1125 | } else { |
1126 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will |
1127 | be case '\0' in this switch statement (ie a default case) */ |
cc4c2da6 |
1128 | switch (*name) { |
1129 | case '&': |
1130 | case '`': |
1131 | case '\'': |
1132 | if ( |
1133 | sv_type == SVt_PVAV || |
1134 | sv_type == SVt_PVHV || |
1135 | sv_type == SVt_PVCV || |
1136 | sv_type == SVt_PVFM || |
1137 | sv_type == SVt_PVIO |
1138 | ) { break; } |
1139 | PL_sawampersand = TRUE; |
1140 | goto ro_magicalize; |
1141 | |
1142 | case ':': |
c69033f2 |
1143 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 |
1144 | goto magicalize; |
1145 | |
1146 | case '?': |
ff0cee69 |
1147 | #ifdef COMPLEX_STATUS |
c69033f2 |
1148 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 |
1149 | #endif |
cc4c2da6 |
1150 | goto magicalize; |
ff0cee69 |
1151 | |
cc4c2da6 |
1152 | case '!': |
d2c93421 |
1153 | |
cc4c2da6 |
1154 | /* If %! has been used, automatically load Errno.pm. |
1155 | The require will itself set errno, so in order to |
1156 | preserve its value we have to set up the magic |
1157 | now (rather than going to magicalize) |
1158 | */ |
d2c93421 |
1159 | |
c69033f2 |
1160 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
1161 | |
cc4c2da6 |
1162 | if (sv_type == SVt_PVHV) |
1163 | require_errno(gv); |
d2c93421 |
1164 | |
6cef1e77 |
1165 | break; |
cc4c2da6 |
1166 | case '-': |
1167 | { |
9d4ba2ae |
1168 | AV* const av = GvAVn(gv); |
a0714e2c |
1169 | sv_magic((SV*)av, NULL, PERL_MAGIC_regdata, NULL, 0); |
03a27ae7 |
1170 | SvREADONLY_on(av); |
cc4c2da6 |
1171 | goto magicalize; |
1172 | } |
1173 | case '*': |
cc4c2da6 |
1174 | case '#': |
1175 | if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) |
1176 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
8ae1fe26 |
1177 | "$%c is no longer supported", *name); |
1178 | break; |
cc4c2da6 |
1179 | case '|': |
c69033f2 |
1180 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 |
1181 | goto magicalize; |
1182 | |
b3ca2e83 |
1183 | case '\010': /* $^H */ |
1184 | { |
1185 | HV *const hv = GvHVn(gv); |
1186 | hv_magic(hv, NULL, PERL_MAGIC_hints); |
1187 | } |
1188 | goto magicalize; |
1189 | |
cc4c2da6 |
1190 | case '+': |
81714fb9 |
1191 | GvMULTI_on(gv); |
cc4c2da6 |
1192 | { |
9d4ba2ae |
1193 | AV* const av = GvAVn(gv); |
81714fb9 |
1194 | HV* const hv = GvHVn(gv); |
bd61b366 |
1195 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, NULL, 0); |
03a27ae7 |
1196 | SvREADONLY_on(av); |
81714fb9 |
1197 | hv_magic(hv, NULL, PERL_MAGIC_regdata_names); |
1198 | SvREADONLY_on(hv); |
cc4c2da6 |
1199 | /* FALL THROUGH */ |
e521374c |
1200 | } |
cc4c2da6 |
1201 | case '\023': /* $^S */ |
1202 | case '1': |
1203 | case '2': |
1204 | case '3': |
1205 | case '4': |
1206 | case '5': |
1207 | case '6': |
1208 | case '7': |
1209 | case '8': |
1210 | case '9': |
1211 | ro_magicalize: |
c69033f2 |
1212 | SvREADONLY_on(GvSVn(gv)); |
cc4c2da6 |
1213 | /* FALL THROUGH */ |
1214 | case '[': |
1215 | case '^': |
1216 | case '~': |
1217 | case '=': |
1218 | case '%': |
1219 | case '.': |
1220 | case '(': |
1221 | case ')': |
1222 | case '<': |
1223 | case '>': |
1224 | case ',': |
1225 | case '\\': |
1226 | case '/': |
1227 | case '\001': /* $^A */ |
1228 | case '\003': /* $^C */ |
1229 | case '\004': /* $^D */ |
1230 | case '\005': /* $^E */ |
1231 | case '\006': /* $^F */ |
cc4c2da6 |
1232 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1233 | case '\016': /* $^N */ |
1234 | case '\017': /* $^O */ |
1235 | case '\020': /* $^P */ |
1236 | case '\024': /* $^T */ |
1237 | case '\027': /* $^W */ |
1238 | magicalize: |
c69033f2 |
1239 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
cc4c2da6 |
1240 | break; |
e521374c |
1241 | |
cc4c2da6 |
1242 | case '\014': /* $^L */ |
c69033f2 |
1243 | sv_setpvn(GvSVn(gv),"\f",1); |
1244 | PL_formfeed = GvSVn(gv); |
463ee0b2 |
1245 | break; |
cc4c2da6 |
1246 | case ';': |
c69033f2 |
1247 | sv_setpvn(GvSVn(gv),"\034",1); |
463ee0b2 |
1248 | break; |
cc4c2da6 |
1249 | case ']': |
1250 | { |
c69033f2 |
1251 | SV * const sv = GvSVn(gv); |
d7aa5382 |
1252 | if (!sv_derived_from(PL_patchlevel, "version")) |
7a5b473e |
1253 | upg_version(PL_patchlevel); |
7d54d38e |
1254 | GvSV(gv) = vnumify(PL_patchlevel); |
1255 | SvREADONLY_on(GvSV(gv)); |
1256 | SvREFCNT_dec(sv); |
93a17b20 |
1257 | } |
1258 | break; |
cc4c2da6 |
1259 | case '\026': /* $^V */ |
1260 | { |
c69033f2 |
1261 | SV * const sv = GvSVn(gv); |
f9be5ac8 |
1262 | GvSV(gv) = new_version(PL_patchlevel); |
1263 | SvREADONLY_on(GvSV(gv)); |
1264 | SvREFCNT_dec(sv); |
16070b82 |
1265 | } |
1266 | break; |
cc4c2da6 |
1267 | } |
79072805 |
1268 | } |
93a17b20 |
1269 | return gv; |
79072805 |
1270 | } |
1271 | |
1272 | void |
35a4481c |
1273 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1274 | { |
35a4481c |
1275 | const char *name; |
7423f6db |
1276 | STRLEN namelen; |
35a4481c |
1277 | const HV * const hv = GvSTASH(gv); |
43693395 |
1278 | if (!hv) { |
0c34ef67 |
1279 | SvOK_off(sv); |
43693395 |
1280 | return; |
1281 | } |
666ea192 |
1282 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 |
1283 | |
bfcb3514 |
1284 | name = HvNAME_get(hv); |
7423f6db |
1285 | if (name) { |
1286 | namelen = HvNAMELEN_get(hv); |
1287 | } else { |
e27ad1f2 |
1288 | name = "__ANON__"; |
7423f6db |
1289 | namelen = 8; |
1290 | } |
a0288114 |
1291 | |
e27ad1f2 |
1292 | if (keepmain || strNE(name, "main")) { |
7423f6db |
1293 | sv_catpvn(sv,name,namelen); |
396482e1 |
1294 | sv_catpvs(sv,"::"); |
43693395 |
1295 | } |
257984c0 |
1296 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 |
1297 | } |
1298 | |
1299 | void |
35a4481c |
1300 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1301 | { |
46c461b5 |
1302 | const GV * const egv = GvEGV(gv); |
1303 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 |
1304 | } |
1305 | |
79072805 |
1306 | IO * |
864dbfa3 |
1307 | Perl_newIO(pTHX) |
79072805 |
1308 | { |
97aff369 |
1309 | dVAR; |
8990e307 |
1310 | GV *iogv; |
561b68a9 |
1311 | IO * const io = (IO*)newSV(0); |
8990e307 |
1312 | |
a0d0e21e |
1313 | sv_upgrade((SV *)io,SVt_PVIO); |
158623e7 |
1314 | /* This used to read SvREFCNT(io) = 1; |
1315 | It's not clear why the reference count needed an explicit reset. NWC |
1316 | */ |
1317 | assert (SvREFCNT(io) == 1); |
8990e307 |
1318 | SvOBJECT_on(io); |
b464bac0 |
1319 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 |
1320 | hv_clear(PL_stashcache); |
71315bf2 |
1321 | iogv = gv_fetchpvs("FileHandle::", 0, SVt_PVHV); |
5f2d631d |
1322 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1323 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
71315bf2 |
1324 | iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV); |
b162af07 |
1325 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 |
1326 | return io; |
1327 | } |
1328 | |
1329 | void |
1146e912 |
1330 | Perl_gv_check(pTHX_ const HV *stash) |
79072805 |
1331 | { |
97aff369 |
1332 | dVAR; |
79072805 |
1333 | register I32 i; |
463ee0b2 |
1334 | |
8990e307 |
1335 | if (!HvARRAY(stash)) |
1336 | return; |
a0d0e21e |
1337 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 |
1338 | const HE *entry; |
dc437b57 |
1339 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 |
1340 | register GV *gv; |
1341 | HV *hv; |
dc437b57 |
1342 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f |
1343 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e |
1344 | { |
19b6c847 |
1345 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1346 | gv_check(hv); /* nested package */ |
1347 | } |
dc437b57 |
1348 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 |
1349 | const char *file; |
dc437b57 |
1350 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1351 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1352 | continue; |
1d7c1841 |
1353 | file = GvFILE(gv); |
1354 | /* performance hack: if filename is absolute and it's a standard |
1355 | * module, don't bother warning */ |
6eb630b7 |
1356 | #ifdef MACOS_TRADITIONAL |
551405c4 |
1357 | # define LIB_COMPONENT ":lib:" |
6eb630b7 |
1358 | #else |
551405c4 |
1359 | # define LIB_COMPONENT "/lib/" |
6eb630b7 |
1360 | #endif |
551405c4 |
1361 | if (file |
1362 | && PERL_FILE_IS_ABSOLUTE(file) |
1363 | && (instr(file, LIB_COMPONENT) || instr(file, ".pm"))) |
1d7c1841 |
1364 | { |
8990e307 |
1365 | continue; |
1d7c1841 |
1366 | } |
1367 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1368 | #ifdef USE_ITHREADS |
dd374669 |
1369 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 |
1370 | #else |
1371 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1372 | #endif |
9014280d |
1373 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 |
1374 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 |
1375 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 |
1376 | } |
79072805 |
1377 | } |
1378 | } |
1379 | } |
1380 | |
1381 | GV * |
e1ec3a88 |
1382 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 |
1383 | { |
97aff369 |
1384 | dVAR; |
cea2e8a9 |
1385 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 |
1386 | GV_ADD, SVt_PVGV); |
79072805 |
1387 | } |
1388 | |
1389 | /* hopefully this is only called on local symbol table entries */ |
1390 | |
1391 | GP* |
864dbfa3 |
1392 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1393 | { |
97aff369 |
1394 | dVAR; |
1d7c1841 |
1395 | if (!gp) |
d4c19fe8 |
1396 | return NULL; |
79072805 |
1397 | gp->gp_refcnt++; |
44a8e56a |
1398 | if (gp->gp_cv) { |
1399 | if (gp->gp_cvgen) { |
1400 | /* multi-named GPs cannot be used for method cache */ |
1401 | SvREFCNT_dec(gp->gp_cv); |
601f1833 |
1402 | gp->gp_cv = NULL; |
44a8e56a |
1403 | gp->gp_cvgen = 0; |
1404 | } |
1405 | else { |
1406 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1407 | PL_sub_generation++; |
44a8e56a |
1408 | } |
1409 | } |
79072805 |
1410 | return gp; |
79072805 |
1411 | } |
1412 | |
1413 | void |
864dbfa3 |
1414 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1415 | { |
97aff369 |
1416 | dVAR; |
79072805 |
1417 | GP* gp; |
1418 | |
f7877b28 |
1419 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 |
1420 | return; |
f248d071 |
1421 | if (gp->gp_refcnt == 0) { |
1422 | if (ckWARN_d(WARN_INTERNAL)) |
9014280d |
1423 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc |
1424 | "Attempt to free unreferenced glob pointers" |
1425 | pTHX__FORMAT pTHX__VALUE); |
79072805 |
1426 | return; |
1427 | } |
44a8e56a |
1428 | if (gp->gp_cv) { |
1429 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1430 | PL_sub_generation++; |
44a8e56a |
1431 | } |
748a9306 |
1432 | if (--gp->gp_refcnt > 0) { |
1433 | if (gp->gp_egv == gv) |
1434 | gp->gp_egv = 0; |
dd38834b |
1435 | GvGP(gv) = 0; |
79072805 |
1436 | return; |
748a9306 |
1437 | } |
79072805 |
1438 | |
f4890806 |
1439 | unshare_hek(gp->gp_file_hek); |
c9da69fb |
1440 | SvREFCNT_dec(gp->gp_sv); |
1441 | SvREFCNT_dec(gp->gp_av); |
bfcb3514 |
1442 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1443 | Somehow gp->gp_hv can end up pointing at freed garbage. */ |
1444 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { |
bfcb3514 |
1445 | const char *hvname = HvNAME_get(gp->gp_hv); |
1446 | if (PL_stashcache && hvname) |
7423f6db |
1447 | hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
1448 | G_DISCARD); |
bfcb3514 |
1449 | SvREFCNT_dec(gp->gp_hv); |
13207a71 |
1450 | } |
c9da69fb |
1451 | SvREFCNT_dec(gp->gp_io); |
1452 | SvREFCNT_dec(gp->gp_cv); |
1453 | SvREFCNT_dec(gp->gp_form); |
748a9306 |
1454 | |
79072805 |
1455 | Safefree(gp); |
1456 | GvGP(gv) = 0; |
1457 | } |
1458 | |
d460ef45 |
1459 | int |
1460 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1461 | { |
53c1dcc0 |
1462 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1463 | PERL_UNUSED_ARG(sv); |
dd374669 |
1464 | |
d460ef45 |
1465 | if (amtp && AMT_AMAGIC(amtp)) { |
1466 | int i; |
1467 | for (i = 1; i < NofAMmeth; i++) { |
53c1dcc0 |
1468 | CV * const cv = amtp->table[i]; |
b37c2d43 |
1469 | if (cv) { |
d460ef45 |
1470 | SvREFCNT_dec((SV *) cv); |
601f1833 |
1471 | amtp->table[i] = NULL; |
d460ef45 |
1472 | } |
1473 | } |
1474 | } |
1475 | return 0; |
1476 | } |
1477 | |
a0d0e21e |
1478 | /* Updates and caches the CV's */ |
1479 | |
1480 | bool |
864dbfa3 |
1481 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1482 | { |
97aff369 |
1483 | dVAR; |
53c1dcc0 |
1484 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
a6006777 |
1485 | AMT amt; |
a0d0e21e |
1486 | |
14899595 |
1487 | if (mg) { |
1488 | const AMT * const amtp = (AMT*)mg->mg_ptr; |
1489 | if (amtp->was_ok_am == PL_amagic_generation |
1490 | && amtp->was_ok_sub == PL_sub_generation) { |
1491 | return (bool)AMT_OVERLOADED(amtp); |
1492 | } |
1493 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
1494 | } |
a0d0e21e |
1495 | |
bfcb3514 |
1496 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e |
1497 | |
d460ef45 |
1498 | Zero(&amt,1,AMT); |
3280af22 |
1499 | amt.was_ok_am = PL_amagic_generation; |
1500 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1501 | amt.fallback = AMGfallNO; |
1502 | amt.flags = 0; |
1503 | |
a6006777 |
1504 | { |
32251b26 |
1505 | int filled = 0, have_ovl = 0; |
1506 | int i, lim = 1; |
a6006777 |
1507 | |
22c35a8c |
1508 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1509 | |
89ffc314 |
1510 | /* Try to find via inheritance. */ |
53c1dcc0 |
1511 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1512 | SV * const sv = gv ? GvSV(gv) : NULL; |
1513 | CV* cv; |
89ffc314 |
1514 | |
1515 | if (!gv) |
32251b26 |
1516 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 |
1517 | #ifdef PERL_DONT_CREATE_GVSV |
1518 | else if (!sv) { |
6f207bd3 |
1519 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 |
1520 | } |
1521 | #endif |
89ffc314 |
1522 | else if (SvTRUE(sv)) |
1523 | amt.fallback=AMGfallYES; |
1524 | else if (SvOK(sv)) |
1525 | amt.fallback=AMGfallNEVER; |
a6006777 |
1526 | |
32251b26 |
1527 | for (i = 1; i < lim; i++) |
601f1833 |
1528 | amt.table[i] = NULL; |
32251b26 |
1529 | for (; i < NofAMmeth; i++) { |
6136c704 |
1530 | const char * const cooky = PL_AMG_names[i]; |
32251b26 |
1531 | /* Human-readable form, for debugging: */ |
6136c704 |
1532 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
e1ec3a88 |
1533 | const STRLEN l = strlen(cooky); |
89ffc314 |
1534 | |
a0288114 |
1535 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1536 | cp, HvNAME_get(stash)) ); |
611c1e95 |
1537 | /* don't fill the cache while looking up! |
1538 | Creation of inheritance stubs in intermediate packages may |
1539 | conflict with the logic of runtime method substitution. |
1540 | Indeed, for inheritance A -> B -> C, if C overloads "+0", |
1541 | then we could have created stubs for "(+0" in A and C too. |
1542 | But if B overloads "bool", we may want to use it for |
1543 | numifying instead of C's "+0". */ |
1544 | if (i >= DESTROY_amg) |
1545 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); |
1546 | else /* Autoload taken care of below */ |
1547 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); |
46fc3d4c |
1548 | cv = 0; |
89ffc314 |
1549 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 |
1550 | const char *hvname; |
44a8e56a |
1551 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 |
1552 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 |
1553 | /* This is a hack to support autoloading..., while |
1554 | knowing *which* methods were declared as overloaded. */ |
44a8e56a |
1555 | /* GvSV contains the name of the method. */ |
6136c704 |
1556 | GV *ngv = NULL; |
c69033f2 |
1557 | SV *gvsv = GvSV(gv); |
a0288114 |
1558 | |
1559 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ |
1560 | "\" for overloaded \"%s\" in package \"%.256s\"\n", |
ca0270c4 |
1561 | (void*)GvSV(gv), cp, hvname) ); |
c69033f2 |
1562 | if (!gvsv || !SvPOK(gvsv) |
1563 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), |
dc848c6f |
1564 | FALSE))) |
1565 | { |
a0288114 |
1566 | /* Can be an import stub (created by "can"). */ |
666ea192 |
1567 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
a0288114 |
1568 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1569 | "in package \"%.256s\"", |
35c1215d |
1570 | (GvCVGEN(gv) ? "Stub found while resolving" |
1571 | : "Can't resolve"), |
bfcb3514 |
1572 | name, cp, hvname); |
44a8e56a |
1573 | } |
dc848c6f |
1574 | cv = GvCV(gv = ngv); |
44a8e56a |
1575 | } |
b464bac0 |
1576 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 |
1577 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a |
1578 | GvNAME(CvGV(cv))) ); |
1579 | filled = 1; |
32251b26 |
1580 | if (i < DESTROY_amg) |
1581 | have_ovl = 1; |
611c1e95 |
1582 | } else if (gv) { /* Autoloaded... */ |
1583 | cv = (CV*)gv; |
1584 | filled = 1; |
44a8e56a |
1585 | } |
b37c2d43 |
1586 | amt.table[i]=(CV*)SvREFCNT_inc_simple(cv); |
a0d0e21e |
1587 | } |
a0d0e21e |
1588 | if (filled) { |
a6006777 |
1589 | AMT_AMAGIC_on(&amt); |
32251b26 |
1590 | if (have_ovl) |
1591 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1592 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1593 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1594 | return have_ovl; |
a0d0e21e |
1595 | } |
1596 | } |
a6006777 |
1597 | /* Here we have no table: */ |
9cbac4c7 |
1598 | /* no_table: */ |
a6006777 |
1599 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1600 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1601 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1602 | return FALSE; |
1603 | } |
1604 | |
32251b26 |
1605 | |
1606 | CV* |
1607 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1608 | { |
97aff369 |
1609 | dVAR; |
3f8f4626 |
1610 | MAGIC *mg; |
32251b26 |
1611 | AMT *amtp; |
1612 | |
bfcb3514 |
1613 | if (!stash || !HvNAME_get(stash)) |
601f1833 |
1614 | return NULL; |
14befaf4 |
1615 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1616 | if (!mg) { |
1617 | do_update: |
1618 | Gv_AMupdate(stash); |
14befaf4 |
1619 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1620 | } |
a9fd4e40 |
1621 | assert(mg); |
32251b26 |
1622 | amtp = (AMT*)mg->mg_ptr; |
1623 | if ( amtp->was_ok_am != PL_amagic_generation |
1624 | || amtp->was_ok_sub != PL_sub_generation ) |
1625 | goto do_update; |
3ad83ce7 |
1626 | if (AMT_AMAGIC(amtp)) { |
b7787f18 |
1627 | CV * const ret = amtp->table[id]; |
3ad83ce7 |
1628 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1629 | /* Passing it through may have resulted in a warning |
1630 | "Inherited AUTOLOAD for a non-method deprecated", since |
1631 | our caller is going through a function call, not a method call. |
1632 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ |
890ce7af |
1633 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 |
1634 | |
1635 | if (gv && GvCV(gv)) |
1636 | return GvCV(gv); |
1637 | } |
1638 | return ret; |
1639 | } |
a0288114 |
1640 | |
601f1833 |
1641 | return NULL; |
32251b26 |
1642 | } |
1643 | |
1644 | |
a0d0e21e |
1645 | SV* |
864dbfa3 |
1646 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1647 | { |
27da23d5 |
1648 | dVAR; |
b267980d |
1649 | MAGIC *mg; |
9c5ffd7c |
1650 | CV *cv=NULL; |
a0d0e21e |
1651 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1652 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 |
1653 | int off = 0, off1, lr = 0, notfound = 0; |
1654 | int postpr = 0, force_cpy = 0; |
1655 | int assign = AMGf_assign & flags; |
1656 | const int assignshift = assign ? 1 : 0; |
497b47a8 |
1657 | #ifdef DEBUGGING |
1658 | int fl=0; |
497b47a8 |
1659 | #endif |
25716404 |
1660 | HV* stash=NULL; |
a0d0e21e |
1661 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 |
1662 | && (stash = SvSTASH(SvRV(left))) |
1663 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1664 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1665 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 |
1666 | : NULL)) |
b267980d |
1667 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1668 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1669 | * usual method */ |
497b47a8 |
1670 | ( |
1671 | #ifdef DEBUGGING |
1672 | fl = 1, |
a0288114 |
1673 | #endif |
497b47a8 |
1674 | cv = cvp[off=method])))) { |
a0d0e21e |
1675 | lr = -1; /* Call method for left argument */ |
1676 | } else { |
1677 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1678 | int logic; |
1679 | |
1680 | /* look for substituted methods */ |
ee239bfe |
1681 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1682 | switch (method) { |
1683 | case inc_amg: |
ee239bfe |
1684 | force_cpy = 1; |
1685 | if ((cv = cvp[off=add_ass_amg]) |
1686 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1687 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1688 | } |
1689 | break; |
1690 | case dec_amg: |
ee239bfe |
1691 | force_cpy = 1; |
1692 | if ((cv = cvp[off = subtr_ass_amg]) |
1693 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1694 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1695 | } |
1696 | break; |
1697 | case bool__amg: |
1698 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1699 | break; |
1700 | case numer_amg: |
1701 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1702 | break; |
1703 | case string_amg: |
1704 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1705 | break; |
b7787f18 |
1706 | case not_amg: |
1707 | (void)((cv = cvp[off=bool__amg]) |
1708 | || (cv = cvp[off=numer_amg]) |
1709 | || (cv = cvp[off=string_amg])); |
1710 | postpr = 1; |
1711 | break; |
748a9306 |
1712 | case copy_amg: |
1713 | { |
76e3520e |
1714 | /* |
1715 | * SV* ref causes confusion with the interpreter variable of |
1716 | * the same name |
1717 | */ |
890ce7af |
1718 | SV* const tmpRef=SvRV(left); |
76e3520e |
1719 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1720 | /* |
1721 | * Just to be extra cautious. Maybe in some |
1722 | * additional cases sv_setsv is safe, too. |
1723 | */ |
890ce7af |
1724 | SV* const newref = newSVsv(tmpRef); |
748a9306 |
1725 | SvOBJECT_on(newref); |
96d4b0ee |
1726 | /* As a bit of a source compatibility hack, SvAMAGIC() and |
1727 | friends dereference an RV, to behave the same was as when |
1728 | overloading was stored on the reference, not the referant. |
1729 | Hence we can't use SvAMAGIC_on() |
1730 | */ |
1731 | SvFLAGS(newref) |= SVf_AMAGIC; |
b162af07 |
1732 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 |
1733 | return newref; |
1734 | } |
1735 | } |
1736 | break; |
a0d0e21e |
1737 | case abs_amg: |
b267980d |
1738 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1739 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af |
1740 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1741 | if (off1==lt_amg) { |
890ce7af |
1742 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1743 | lt_amg,AMGf_noright); |
1744 | logic = SvTRUE(lessp); |
1745 | } else { |
890ce7af |
1746 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1747 | ncmp_amg,AMGf_noright); |
1748 | logic = (SvNV(lessp) < 0); |
1749 | } |
1750 | if (logic) { |
1751 | if (off==subtr_amg) { |
1752 | right = left; |
748a9306 |
1753 | left = nullsv; |
a0d0e21e |
1754 | lr = 1; |
1755 | } |
1756 | } else { |
1757 | return left; |
1758 | } |
1759 | } |
1760 | break; |
1761 | case neg_amg: |
155aba94 |
1762 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1763 | right = left; |
1764 | left = sv_2mortal(newSViv(0)); |
1765 | lr = 1; |
1766 | } |
1767 | break; |
f216259d |
1768 | case int_amg: |
f5284f61 |
1769 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1770 | /* FAIL safe */ |
1771 | return NULL; /* Delegate operation to standard mechanisms. */ |
1772 | break; |
f5284f61 |
1773 | case to_sv_amg: |
1774 | case to_av_amg: |
1775 | case to_hv_amg: |
1776 | case to_gv_amg: |
1777 | case to_cv_amg: |
1778 | /* FAIL safe */ |
b267980d |
1779 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1780 | break; |
a0d0e21e |
1781 | default: |
1782 | goto not_found; |
1783 | } |
1784 | if (!cv) goto not_found; |
1785 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
25716404 |
1786 | && (stash = SvSTASH(SvRV(right))) |
1787 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1788 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1789 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 |
1790 | : NULL)) |
a0d0e21e |
1791 | && (cv = cvp[off=method])) { /* Method for right |
1792 | * argument found */ |
1793 | lr=1; |
b267980d |
1794 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1795 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1796 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1797 | && !(flags & AMGf_unary)) { |
1798 | /* We look for substitution for |
1799 | * comparison operations and |
fc36a67e |
1800 | * concatenation */ |
a0d0e21e |
1801 | if (method==concat_amg || method==concat_ass_amg |
1802 | || method==repeat_amg || method==repeat_ass_amg) { |
1803 | return NULL; /* Delegate operation to string conversion */ |
1804 | } |
1805 | off = -1; |
1806 | switch (method) { |
1807 | case lt_amg: |
1808 | case le_amg: |
1809 | case gt_amg: |
1810 | case ge_amg: |
1811 | case eq_amg: |
1812 | case ne_amg: |
1813 | postpr = 1; off=ncmp_amg; break; |
1814 | case slt_amg: |
1815 | case sle_amg: |
1816 | case sgt_amg: |
1817 | case sge_amg: |
1818 | case seq_amg: |
1819 | case sne_amg: |
1820 | postpr = 1; off=scmp_amg; break; |
1821 | } |
1822 | if (off != -1) cv = cvp[off]; |
1823 | if (!cv) { |
1824 | goto not_found; |
1825 | } |
1826 | } else { |
a6006777 |
1827 | not_found: /* No method found, either report or croak */ |
b267980d |
1828 | switch (method) { |
1829 | case to_sv_amg: |
1830 | case to_av_amg: |
1831 | case to_hv_amg: |
1832 | case to_gv_amg: |
1833 | case to_cv_amg: |
1834 | /* FAIL safe */ |
1835 | return left; /* Delegate operation to standard mechanisms. */ |
1836 | break; |
1837 | } |
a0d0e21e |
1838 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1839 | notfound = 1; lr = -1; |
1840 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1841 | notfound = 1; lr = 1; |
4cc0ca18 |
1842 | } else if ((amtp && amtp->fallback >= AMGfallYES) && !DEBUG_o_TEST) { |
1843 | /* Skip generating the "no method found" message. */ |
1844 | return NULL; |
a0d0e21e |
1845 | } else { |
46fc3d4c |
1846 | SV *msg; |
774d564b |
1847 | if (off==-1) off=method; |
b267980d |
1848 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 |
1849 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 |
1850 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1851 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1852 | SvAMAGIC(left)? |
a0d0e21e |
1853 | "in overloaded package ": |
1854 | "has no overloaded magic", |
b267980d |
1855 | SvAMAGIC(left)? |
bfcb3514 |
1856 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e |
1857 | "", |
b267980d |
1858 | SvAMAGIC(right)? |
e7ea3e70 |
1859 | ",\n\tright argument in overloaded package ": |
b267980d |
1860 | (flags & AMGf_unary |
e7ea3e70 |
1861 | ? "" |
1862 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1863 | SvAMAGIC(right)? |
bfcb3514 |
1864 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c |
1865 | "")); |
a0d0e21e |
1866 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 |
1867 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e |
1868 | } else { |
95b63a38 |
1869 | Perl_croak(aTHX_ "%"SVf, (void*)msg); |
a0d0e21e |
1870 | } |
1871 | return NULL; |
1872 | } |
ee239bfe |
1873 | force_cpy = force_cpy || assign; |
a0d0e21e |
1874 | } |
1875 | } |
497b47a8 |
1876 | #ifdef DEBUGGING |
a0d0e21e |
1877 | if (!notfound) { |
497b47a8 |
1878 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 |
1879 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 |
1880 | AMG_id2name(off), |
1881 | method+assignshift==off? "" : |
a0288114 |
1882 | " (initially \"", |
497b47a8 |
1883 | method+assignshift==off? "" : |
1884 | AMG_id2name(method+assignshift), |
a0288114 |
1885 | method+assignshift==off? "" : "\")", |
497b47a8 |
1886 | flags & AMGf_unary? "" : |
1887 | lr==1 ? " for right argument": " for left argument", |
1888 | flags & AMGf_unary? " for argument" : "", |
bfcb3514 |
1889 | stash ? HvNAME_get(stash) : "null", |
497b47a8 |
1890 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1891 | } |
497b47a8 |
1892 | #endif |
748a9306 |
1893 | /* Since we use shallow copy during assignment, we need |
1894 | * to dublicate the contents, probably calling user-supplied |
1895 | * version of copy operator |
1896 | */ |
ee239bfe |
1897 | /* We need to copy in following cases: |
1898 | * a) Assignment form was called. |
1899 | * assignshift==1, assign==T, method + 1 == off |
1900 | * b) Increment or decrement, called directly. |
1901 | * assignshift==0, assign==0, method + 0 == off |
1902 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1903 | * assignshift==0, assign==T, |
ee239bfe |
1904 | * force_cpy == T |
1905 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1906 | * assignshift==0, assign==0, |
ee239bfe |
1907 | * force_cpy == T |
1908 | * e) Assignment form translated to nomethod. |
1909 | * assignshift==1, assign==T, method + 1 != off |
1910 | * force_cpy == T |
1911 | */ |
1912 | /* off is method, method+assignshift, or a result of opcode substitution. |
1913 | * In the latter case assignshift==0, so only notfound case is important. |
1914 | */ |
1915 | if (( (method + assignshift == off) |
1916 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1917 | || force_cpy) |
1918 | RvDEEPCP(left); |
a0d0e21e |
1919 | { |
1920 | dSP; |
1921 | BINOP myop; |
1922 | SV* res; |
b7787f18 |
1923 | const bool oldcatch = CATCH_GET; |
a0d0e21e |
1924 | |
54310121 |
1925 | CATCH_SET(TRUE); |
a0d0e21e |
1926 | Zero(&myop, 1, BINOP); |
1927 | myop.op_last = (OP *) &myop; |
b37c2d43 |
1928 | myop.op_next = NULL; |
54310121 |
1929 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1930 | |
e788e7d3 |
1931 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1932 | ENTER; |
462e5cf6 |
1933 | SAVEOP(); |
533c011a |
1934 | PL_op = (OP *) &myop; |
3280af22 |
1935 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1936 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1937 | PUTBACK; |
cea2e8a9 |
1938 | pp_pushmark(); |
a0d0e21e |
1939 | |
924508f0 |
1940 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1941 | PUSHs(lr>0? right: left); |
1942 | PUSHs(lr>0? left: right); |
3280af22 |
1943 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1944 | if (notfound) { |
89ffc314 |
1945 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1946 | } |
1947 | PUSHs((SV*)cv); |
1948 | PUTBACK; |
1949 | |
155aba94 |
1950 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1951 | CALLRUNOPS(aTHX); |
a0d0e21e |
1952 | LEAVE; |
1953 | SPAGAIN; |
1954 | |
1955 | res=POPs; |
ebafeae7 |
1956 | PUTBACK; |
d3acc0f7 |
1957 | POPSTACK; |
54310121 |
1958 | CATCH_SET(oldcatch); |
a0d0e21e |
1959 | |
a0d0e21e |
1960 | if (postpr) { |
b7787f18 |
1961 | int ans; |
a0d0e21e |
1962 | switch (method) { |
1963 | case le_amg: |
1964 | case sle_amg: |
1965 | ans=SvIV(res)<=0; break; |
1966 | case lt_amg: |
1967 | case slt_amg: |
1968 | ans=SvIV(res)<0; break; |
1969 | case ge_amg: |
1970 | case sge_amg: |
1971 | ans=SvIV(res)>=0; break; |
1972 | case gt_amg: |
1973 | case sgt_amg: |
1974 | ans=SvIV(res)>0; break; |
1975 | case eq_amg: |
1976 | case seq_amg: |
1977 | ans=SvIV(res)==0; break; |
1978 | case ne_amg: |
1979 | case sne_amg: |
1980 | ans=SvIV(res)!=0; break; |
1981 | case inc_amg: |
1982 | case dec_amg: |
bbce6d69 |
1983 | SvSetSV(left,res); return left; |
dc437b57 |
1984 | case not_amg: |
fe7ac86a |
1985 | ans=!SvTRUE(res); break; |
b7787f18 |
1986 | default: |
1987 | ans=0; break; |
a0d0e21e |
1988 | } |
54310121 |
1989 | return boolSV(ans); |
748a9306 |
1990 | } else if (method==copy_amg) { |
1991 | if (!SvROK(res)) { |
cea2e8a9 |
1992 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1993 | } |
1994 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1995 | } else { |
1996 | return res; |
1997 | } |
1998 | } |
1999 | } |
c9d5ac95 |
2000 | |
2001 | /* |
7fc63493 |
2002 | =for apidoc is_gv_magical_sv |
c9d5ac95 |
2003 | |
7a5fd60d |
2004 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
2005 | |
2006 | =cut |
2007 | */ |
2008 | |
2009 | bool |
2010 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) |
2011 | { |
2012 | STRLEN len; |
b64e5050 |
2013 | const char * const temp = SvPV_const(name, len); |
7a5fd60d |
2014 | return is_gv_magical(temp, len, flags); |
2015 | } |
2016 | |
2017 | /* |
2018 | =for apidoc is_gv_magical |
2019 | |
c9d5ac95 |
2020 | Returns C<TRUE> if given the name of a magical GV. |
2021 | |
2022 | Currently only useful internally when determining if a GV should be |
2023 | created even in rvalue contexts. |
2024 | |
2025 | C<flags> is not used at present but available for future extension to |
2026 | allow selecting particular classes of magical variable. |
2027 | |
b9b0e72c |
2028 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
2029 | This assumption is met by all callers within the perl core, which all pass |
2030 | pointers returned by SvPV. |
2031 | |
c9d5ac95 |
2032 | =cut |
2033 | */ |
2034 | bool |
7fc63493 |
2035 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 |
2036 | { |
b37c2d43 |
2037 | PERL_UNUSED_CONTEXT; |
9d4ba2ae |
2038 | PERL_UNUSED_ARG(flags); |
2039 | |
b9b0e72c |
2040 | if (len > 1) { |
b464bac0 |
2041 | const char * const name1 = name + 1; |
b9b0e72c |
2042 | switch (*name) { |
2043 | case 'I': |
9431620d |
2044 | if (len == 3 && name1[1] == 'S' && name[2] == 'A') |
b9b0e72c |
2045 | goto yes; |
2046 | break; |
2047 | case 'O': |
9431620d |
2048 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c |
2049 | goto yes; |
2050 | break; |
2051 | case 'S': |
9431620d |
2052 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c |
2053 | goto yes; |
2054 | break; |
2055 | /* Using ${^...} variables is likely to be sufficiently rare that |
2056 | it seems sensible to avoid the space hit of also checking the |
2057 | length. */ |
2058 | case '\017': /* ${^OPEN} */ |
9431620d |
2059 | if (strEQ(name1, "PEN")) |
b9b0e72c |
2060 | goto yes; |
2061 | break; |
2062 | case '\024': /* ${^TAINT} */ |
9431620d |
2063 | if (strEQ(name1, "AINT")) |
b9b0e72c |
2064 | goto yes; |
2065 | break; |
2066 | case '\025': /* ${^UNICODE} */ |
9431620d |
2067 | if (strEQ(name1, "NICODE")) |
b9b0e72c |
2068 | goto yes; |
a0288114 |
2069 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 |
2070 | goto yes; |
b9b0e72c |
2071 | break; |
2072 | case '\027': /* ${^WARNING_BITS} */ |
9431620d |
2073 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c |
2074 | goto yes; |
2075 | break; |
2076 | case '1': |
2077 | case '2': |
2078 | case '3': |
2079 | case '4': |
2080 | case '5': |
2081 | case '6': |
2082 | case '7': |
2083 | case '8': |
2084 | case '9': |
c9d5ac95 |
2085 | { |
7fc63493 |
2086 | const char *end = name + len; |
c9d5ac95 |
2087 | while (--end > name) { |
2088 | if (!isDIGIT(*end)) |
2089 | return FALSE; |
2090 | } |
b9b0e72c |
2091 | goto yes; |
2092 | } |
2093 | } |
2094 | } else { |
2095 | /* Because we're already assuming that name is NUL terminated |
2096 | below, we can treat an empty name as "\0" */ |
2097 | switch (*name) { |
2098 | case '&': |
2099 | case '`': |
2100 | case '\'': |
2101 | case ':': |
2102 | case '?': |
2103 | case '!': |
2104 | case '-': |
2105 | case '#': |
2106 | case '[': |
2107 | case '^': |
2108 | case '~': |
2109 | case '=': |
2110 | case '%': |
2111 | case '.': |
2112 | case '(': |
2113 | case ')': |
2114 | case '<': |
2115 | case '>': |
2116 | case ',': |
2117 | case '\\': |
2118 | case '/': |
2119 | case '|': |
2120 | case '+': |
2121 | case ';': |
2122 | case ']': |
2123 | case '\001': /* $^A */ |
2124 | case '\003': /* $^C */ |
2125 | case '\004': /* $^D */ |
2126 | case '\005': /* $^E */ |
2127 | case '\006': /* $^F */ |
2128 | case '\010': /* $^H */ |
2129 | case '\011': /* $^I, NOT \t in EBCDIC */ |
2130 | case '\014': /* $^L */ |
2131 | case '\016': /* $^N */ |
2132 | case '\017': /* $^O */ |
2133 | case '\020': /* $^P */ |
2134 | case '\023': /* $^S */ |
2135 | case '\024': /* $^T */ |
2136 | case '\026': /* $^V */ |
2137 | case '\027': /* $^W */ |
2138 | case '1': |
2139 | case '2': |
2140 | case '3': |
2141 | case '4': |
2142 | case '5': |
2143 | case '6': |
2144 | case '7': |
2145 | case '8': |
2146 | case '9': |
2147 | yes: |
2148 | return TRUE; |
2149 | default: |
2150 | break; |
c9d5ac95 |
2151 | } |
c9d5ac95 |
2152 | } |
2153 | return FALSE; |
2154 | } |
66610fdd |
2155 | |
f5c1e807 |
2156 | void |
2157 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) |
2158 | { |
2159 | dVAR; |
acda4c6a |
2160 | U32 hash; |
f5c1e807 |
2161 | |
9f616d01 |
2162 | assert(name); |
f5c1e807 |
2163 | PERL_UNUSED_ARG(flags); |
2164 | |
acda4c6a |
2165 | if (len > I32_MAX) |
2166 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); |
2167 | |
ae8cc45f |
2168 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2169 | unshare_hek(GvNAME_HEK(gv)); |
2170 | } |
2171 | |
acda4c6a |
2172 | PERL_HASH(hash, name, len); |
9f616d01 |
2173 | GvNAME_HEK(gv) = share_hek(name, len, hash); |
f5c1e807 |
2174 | } |
2175 | |
66610fdd |
2176 | /* |
2177 | * Local variables: |
2178 | * c-indentation-style: bsd |
2179 | * c-basic-offset: 4 |
2180 | * indent-tabs-mode: t |
2181 | * End: |
2182 | * |
37442d52 |
2183 | * ex: set ts=8 sts=4 sw=4 noet: |
2184 | */ |