Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
4bb101f2 |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
b5f8cc5c |
4 | * 2000, 2001, 2002, 2003, 2004, 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 $foo, @foo, %foo. |
26 | |
27 | GVs are usually found as values in stashes (symbol table hashes) where |
28 | Perl stores its global variables. |
29 | |
30 | =cut |
ccfc67b7 |
31 | */ |
32 | |
79072805 |
33 | #include "EXTERN.h" |
864dbfa3 |
34 | #define PERL_IN_GV_C |
79072805 |
35 | #include "perl.h" |
36 | |
37 | GV * |
864dbfa3 |
38 | Perl_gv_AVadd(pTHX_ register GV *gv) |
79072805 |
39 | { |
a0d0e21e |
40 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
41 | Perl_croak(aTHX_ "Bad symbol for array"); |
79072805 |
42 | if (!GvAV(gv)) |
43 | GvAV(gv) = newAV(); |
44 | return gv; |
45 | } |
46 | |
47 | GV * |
864dbfa3 |
48 | Perl_gv_HVadd(pTHX_ register GV *gv) |
79072805 |
49 | { |
a0d0e21e |
50 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
51 | Perl_croak(aTHX_ "Bad symbol for hash"); |
79072805 |
52 | if (!GvHV(gv)) |
463ee0b2 |
53 | GvHV(gv) = newHV(); |
79072805 |
54 | return gv; |
55 | } |
56 | |
57 | GV * |
864dbfa3 |
58 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e |
59 | { |
60 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
61 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
5bd07a3d |
62 | if (!GvIOp(gv)) { |
7fb37951 |
63 | #ifdef GV_UNIQUE_CHECK |
64 | if (GvUNIQUE(gv)) { |
65 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); |
5bd07a3d |
66 | } |
67 | #endif |
a0d0e21e |
68 | GvIOp(gv) = newIO(); |
5bd07a3d |
69 | } |
a0d0e21e |
70 | return gv; |
71 | } |
72 | |
73 | GV * |
864dbfa3 |
74 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
75 | { |
eacec437 |
76 | char smallbuf[256]; |
53d95988 |
77 | char *tmpbuf; |
8ebc5c01 |
78 | STRLEN tmplen; |
79072805 |
79 | GV *gv; |
80 | |
1d7c1841 |
81 | if (!PL_defstash) |
82 | return Nullgv; |
83 | |
53d95988 |
84 | tmplen = strlen(name) + 2; |
85 | if (tmplen < sizeof smallbuf) |
86 | tmpbuf = smallbuf; |
87 | else |
88 | New(603, tmpbuf, tmplen + 1, char); |
0ac0412a |
89 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 |
90 | tmpbuf[0] = '_'; |
91 | tmpbuf[1] = '<'; |
92 | strcpy(tmpbuf + 2, name); |
3280af22 |
93 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
94 | if (!isGV(gv)) { |
3280af22 |
95 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
1d7c1841 |
96 | sv_setpv(GvSV(gv), name); |
97 | if (PERLDB_LINE) |
14befaf4 |
98 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile); |
1d7c1841 |
99 | } |
53d95988 |
100 | if (tmpbuf != smallbuf) |
101 | Safefree(tmpbuf); |
79072805 |
102 | return gv; |
103 | } |
104 | |
463ee0b2 |
105 | void |
864dbfa3 |
106 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
107 | { |
108 | register GP *gp; |
55d729e4 |
109 | bool doproto = SvTYPE(gv) > SVt_NULL; |
110 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
463ee0b2 |
111 | |
dc437b57 |
112 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
113 | if (SvLEN(gv)) { |
114 | if (proto) { |
115 | SvPVX(gv) = NULL; |
116 | SvLEN(gv) = 0; |
117 | SvPOK_off(gv); |
118 | } else |
119 | Safefree(SvPVX(gv)); |
120 | } |
44a8e56a |
121 | Newz(602, gp, 1, GP); |
8990e307 |
122 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
123 | GvSV(gv) = NEWSV(72,0); |
1d7c1841 |
124 | GvLINE(gv) = CopLINE(PL_curcop); |
125 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; |
005a453c |
126 | GvCVGEN(gv) = 0; |
463ee0b2 |
127 | GvEGV(gv) = gv; |
14befaf4 |
128 | sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0); |
85aff577 |
129 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e |
130 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
131 | GvNAMELEN(gv) = len; |
23ad5bf5 |
132 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
133 | GvMULTI_on(gv); |
55d729e4 |
134 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
135 | SvIOK_off(gv); |
55d729e4 |
136 | ENTER; |
b099ddc0 |
137 | /* XXX unsafe for threads if eval_owner isn't held */ |
55d729e4 |
138 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 |
139 | GvCV(gv) = PL_compcv; |
55d729e4 |
140 | LEAVE; |
141 | |
3280af22 |
142 | PL_sub_generation++; |
65c50114 |
143 | CvGV(GvCV(gv)) = gv; |
e0d088d0 |
144 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 |
145 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
146 | if (proto) { |
147 | sv_setpv((SV*)GvCV(gv), proto); |
148 | Safefree(proto); |
149 | } |
150 | } |
463ee0b2 |
151 | } |
152 | |
76e3520e |
153 | STATIC void |
cea2e8a9 |
154 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
155 | { |
156 | switch (sv_type) { |
157 | case SVt_PVIO: |
158 | (void)GvIOn(gv); |
159 | break; |
160 | case SVt_PVAV: |
161 | (void)GvAVn(gv); |
162 | break; |
163 | case SVt_PVHV: |
164 | (void)GvHVn(gv); |
165 | break; |
166 | } |
167 | } |
168 | |
954c1994 |
169 | /* |
170 | =for apidoc gv_fetchmeth |
171 | |
172 | Returns the glob with the given C<name> and a defined subroutine or |
173 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
174 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
175 | |
176 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
177 | side-effect creates a glob with the given C<name> in the given C<stash> |
178 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
179 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
180 | |
181 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
182 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
183 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
184 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
185 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
186 | |
187 | =cut |
188 | */ |
189 | |
79072805 |
190 | GV * |
864dbfa3 |
191 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
192 | { |
193 | AV* av; |
463ee0b2 |
194 | GV* topgv; |
79072805 |
195 | GV* gv; |
463ee0b2 |
196 | GV** gvp; |
748a9306 |
197 | CV* cv; |
a0d0e21e |
198 | |
af09ea45 |
199 | /* UNIVERSAL methods should be callable without a stash */ |
200 | if (!stash) { |
201 | level = -1; /* probably appropriate */ |
202 | if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE))) |
203 | return 0; |
204 | } |
205 | |
e27ad1f2 |
206 | if (!HvNAME(stash)) |
207 | Perl_croak(aTHX_ |
208 | "Can't use anonymous symbol table for method lookup"); |
209 | |
44a8e56a |
210 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
211 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
3e0ccd42 |
212 | name, HvNAME(stash)); |
463ee0b2 |
213 | |
cea2e8a9 |
214 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
215 | |
216 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
217 | if (!gvp) |
218 | topgv = Nullgv; |
219 | else { |
220 | topgv = *gvp; |
221 | if (SvTYPE(topgv) != SVt_PVGV) |
222 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
223 | if ((cv = GvCV(topgv))) { |
44a8e56a |
224 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
225 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
226 | return topgv; |
44a8e56a |
227 | /* Stale cached entry: junk it */ |
228 | SvREFCNT_dec(cv); |
229 | GvCV(topgv) = cv = Nullcv; |
230 | GvCVGEN(topgv) = 0; |
748a9306 |
231 | } |
3280af22 |
232 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
233 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
234 | } |
79072805 |
235 | |
9607fc9c |
236 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
237 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
238 | |
fb73857a |
239 | /* create and re-create @.*::SUPER::ISA on demand */ |
240 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
241 | char* packname = HvNAME(stash); |
242 | STRLEN packlen = strlen(packname); |
243 | |
244 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
245 | HV* basestash; |
246 | |
247 | packlen -= 7; |
248 | basestash = gv_stashpvn(packname, packlen, TRUE); |
249 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
250 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
9607fc9c |
251 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
252 | if (!gvp || !(gv = *gvp)) |
cea2e8a9 |
253 | Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); |
9607fc9c |
254 | if (SvTYPE(gv) != SVt_PVGV) |
255 | gv_init(gv, stash, "ISA", 3, TRUE); |
256 | SvREFCNT_dec(GvAV(gv)); |
257 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
258 | } |
259 | } |
260 | } |
261 | |
262 | if (av) { |
79072805 |
263 | SV** svp = AvARRAY(av); |
93965878 |
264 | /* NOTE: No support for tied ISA */ |
265 | I32 items = AvFILLp(av) + 1; |
79072805 |
266 | while (items--) { |
79072805 |
267 | SV* sv = *svp++; |
a0d0e21e |
268 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
269 | if (!basestash) { |
599cee73 |
270 | if (ckWARN(WARN_MISC)) |
35c1215d |
271 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA", |
272 | sv, HvNAME(stash)); |
79072805 |
273 | continue; |
274 | } |
44a8e56a |
275 | gv = gv_fetchmeth(basestash, name, len, |
276 | (level >= 0) ? level + 1 : level - 1); |
277 | if (gv) |
278 | goto gotcha; |
79072805 |
279 | } |
280 | } |
a0d0e21e |
281 | |
9607fc9c |
282 | /* if at top level, try UNIVERSAL */ |
283 | |
44a8e56a |
284 | if (level == 0 || level == -1) { |
9607fc9c |
285 | HV* lastchance; |
286 | |
155aba94 |
287 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
288 | if ((gv = gv_fetchmeth(lastchance, name, len, |
289 | (level >= 0) ? level + 1 : level - 1))) |
290 | { |
44a8e56a |
291 | gotcha: |
dc848c6f |
292 | /* |
293 | * Cache method in topgv if: |
294 | * 1. topgv has no synonyms (else inheritance crosses wires) |
295 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
296 | */ |
297 | if (topgv && |
298 | GvREFCNT(topgv) == 1 && |
299 | (cv = GvCV(gv)) && |
300 | (CvROOT(cv) || CvXSUB(cv))) |
301 | { |
155aba94 |
302 | if ((cv = GvCV(topgv))) |
44a8e56a |
303 | SvREFCNT_dec(cv); |
304 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
305 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
306 | } |
a0d0e21e |
307 | return gv; |
308 | } |
005a453c |
309 | else if (topgv && GvREFCNT(topgv) == 1) { |
310 | /* cache the fact that the method is not defined */ |
3280af22 |
311 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
312 | } |
a0d0e21e |
313 | } |
314 | } |
315 | |
79072805 |
316 | return 0; |
317 | } |
318 | |
954c1994 |
319 | /* |
611c1e95 |
320 | =for apidoc gv_fetchmeth_autoload |
321 | |
322 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. |
323 | Returns a glob for the subroutine. |
324 | |
325 | For an autoloaded subroutine without a GV, will create a GV even |
326 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() |
327 | of the result may be zero. |
328 | |
329 | =cut |
330 | */ |
331 | |
332 | GV * |
333 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
334 | { |
335 | GV *gv = gv_fetchmeth(stash, name, len, level); |
336 | |
337 | if (!gv) { |
338 | char autoload[] = "AUTOLOAD"; |
339 | STRLEN autolen = sizeof(autoload)-1; |
340 | CV *cv; |
341 | GV **gvp; |
342 | |
343 | if (!stash) |
344 | return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
345 | if (len == autolen && strnEQ(name, autoload, autolen)) |
346 | return Nullgv; |
347 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
348 | return Nullgv; |
349 | cv = GvCV(gv); |
350 | if (!(CvROOT(cv) || CvXSUB(cv))) |
351 | return Nullgv; |
352 | /* Have an autoload */ |
353 | if (level < 0) /* Cannot do without a stub */ |
354 | gv_fetchmeth(stash, name, len, 0); |
355 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
356 | if (!gvp) |
357 | return Nullgv; |
358 | return *gvp; |
359 | } |
360 | return gv; |
361 | } |
362 | |
363 | /* |
954c1994 |
364 | =for apidoc gv_fetchmethod |
365 | |
6d0f518e |
366 | See L<gv_fetchmethod_autoload>. |
954c1994 |
367 | |
368 | =cut |
369 | */ |
370 | |
79072805 |
371 | GV * |
864dbfa3 |
372 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
463ee0b2 |
373 | { |
dc848c6f |
374 | return gv_fetchmethod_autoload(stash, name, TRUE); |
375 | } |
376 | |
954c1994 |
377 | /* |
378 | =for apidoc gv_fetchmethod_autoload |
379 | |
380 | Returns the glob which contains the subroutine to call to invoke the method |
381 | on the C<stash>. In fact in the presence of autoloading this may be the |
382 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
383 | already setup. |
954c1994 |
384 | |
385 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
386 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
387 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
388 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
389 | with a non-zero C<autoload> parameter. |
954c1994 |
390 | |
391 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
392 | that if you want to keep the returned glob for a long time, you need to |
393 | check for it being "AUTOLOAD", since at the later time the call may load a |
394 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
395 | created via a side effect to do this. |
954c1994 |
396 | |
397 | These functions have the same side-effects and as C<gv_fetchmeth> with |
398 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
399 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
400 | C<call_sv> apply equally to these functions. |
954c1994 |
401 | |
402 | =cut |
403 | */ |
404 | |
dc848c6f |
405 | GV * |
864dbfa3 |
406 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
407 | { |
08105a92 |
408 | register const char *nend; |
409 | const char *nsplit = 0; |
a0d0e21e |
410 | GV* gv; |
0dae17bd |
411 | HV* ostash = stash; |
412 | |
413 | if (stash && SvTYPE(stash) < SVt_PVHV) |
414 | stash = Nullhv; |
b267980d |
415 | |
463ee0b2 |
416 | for (nend = name; *nend; nend++) { |
9607fc9c |
417 | if (*nend == '\'') |
a0d0e21e |
418 | nsplit = nend; |
9607fc9c |
419 | else if (*nend == ':' && *(nend + 1) == ':') |
420 | nsplit = ++nend; |
a0d0e21e |
421 | } |
422 | if (nsplit) { |
08105a92 |
423 | const char *origname = name; |
a0d0e21e |
424 | name = nsplit + 1; |
a0d0e21e |
425 | if (*nsplit == ':') |
426 | --nsplit; |
9607fc9c |
427 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
428 | /* ->SUPER::method should really be looked up in original stash */ |
cea2e8a9 |
429 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
430 | CopSTASHPV(PL_curcop))); |
af09ea45 |
431 | /* __PACKAGE__::SUPER stash should be autovivified */ |
9607fc9c |
432 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
433 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
9607fc9c |
434 | origname, HvNAME(stash), name) ); |
4633a7c4 |
435 | } |
e189a56d |
436 | else { |
af09ea45 |
437 | /* don't autovifify if ->NoSuchStash::method */ |
438 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); |
e189a56d |
439 | |
440 | /* however, explicit calls to Pkg::SUPER::method may |
441 | happen, and may require autovivification to work */ |
442 | if (!stash && (nsplit - origname) >= 7 && |
443 | strnEQ(nsplit - 7, "::SUPER", 7) && |
444 | gv_stashpvn(origname, nsplit - origname - 7, FALSE)) |
445 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
446 | } |
0dae17bd |
447 | ostash = stash; |
4633a7c4 |
448 | } |
449 | |
9607fc9c |
450 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
451 | if (!gv) { |
2f6e0fe7 |
452 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
453 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
454 | else if (autoload) |
0dae17bd |
455 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 |
456 | } |
dc848c6f |
457 | else if (autoload) { |
458 | CV* cv = GvCV(gv); |
09280a33 |
459 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
460 | GV* stubgv; |
461 | GV* autogv; |
462 | |
463 | if (CvANON(cv)) |
464 | stubgv = gv; |
465 | else { |
466 | stubgv = CvGV(cv); |
467 | if (GvCV(stubgv) != cv) /* orphaned import */ |
468 | stubgv = gv; |
469 | } |
470 | autogv = gv_autoload4(GvSTASH(stubgv), |
471 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
472 | if (autogv) |
473 | gv = autogv; |
474 | } |
475 | } |
44a8e56a |
476 | |
477 | return gv; |
478 | } |
479 | |
480 | GV* |
864dbfa3 |
481 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
482 | { |
df3728a2 |
483 | char autoload[] = "AUTOLOAD"; |
484 | STRLEN autolen = sizeof(autoload)-1; |
44a8e56a |
485 | GV* gv; |
486 | CV* cv; |
487 | HV* varstash; |
488 | GV* vargv; |
489 | SV* varsv; |
0dae17bd |
490 | char *packname = ""; |
44a8e56a |
491 | |
492 | if (len == autolen && strnEQ(name, autoload, autolen)) |
493 | return Nullgv; |
0dae17bd |
494 | if (stash) { |
495 | if (SvTYPE(stash) < SVt_PVHV) { |
496 | packname = SvPV_nolen((SV*)stash); |
497 | stash = Nullhv; |
498 | } |
499 | else { |
500 | packname = HvNAME(stash); |
501 | } |
502 | } |
dc848c6f |
503 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
504 | return Nullgv; |
505 | cv = GvCV(gv); |
506 | |
adb5a9ae |
507 | if (!(CvROOT(cv) || CvXSUB(cv))) |
ed850460 |
508 | return Nullgv; |
509 | |
dc848c6f |
510 | /* |
511 | * Inheriting AUTOLOAD for non-methods works ... for now. |
512 | */ |
12bcd1a6 |
513 | if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && !method && |
599cee73 |
514 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
12bcd1a6 |
515 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f |
516 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd |
517 | packname, (int)len, name); |
44a8e56a |
518 | |
adb5a9ae |
519 | if (CvXSUB(cv)) { |
520 | /* rather than lookup/init $AUTOLOAD here |
521 | * only to have the XSUB do another lookup for $AUTOLOAD |
522 | * and split that value on the last '::', |
523 | * pass along the same data via some unused fields in the CV |
524 | */ |
525 | CvSTASH(cv) = stash; |
0222aa7d |
526 | SvPVX(cv) = (char *)name; /* cast to lose constness warning */ |
adb5a9ae |
527 | SvCUR(cv) = len; |
528 | return gv; |
529 | } |
adb5a9ae |
530 | |
44a8e56a |
531 | /* |
532 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
533 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
534 | * use that, but for lack of anything better we will use the sub's |
535 | * original package to look up $AUTOLOAD. |
536 | */ |
537 | varstash = GvSTASH(CvGV(cv)); |
538 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
3d35f11b |
539 | ENTER; |
540 | |
44a8e56a |
541 | if (!isGV(vargv)) |
542 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
3d35f11b |
543 | LEAVE; |
44a8e56a |
544 | varsv = GvSV(vargv); |
0dae17bd |
545 | sv_setpv(varsv, packname); |
44a8e56a |
546 | sv_catpvn(varsv, "::", 2); |
547 | sv_catpvn(varsv, name, len); |
548 | SvTAINTED_off(varsv); |
a0d0e21e |
549 | return gv; |
550 | } |
551 | |
d2c93421 |
552 | /* The "gv" parameter should be the glob known to Perl code as *! |
553 | * The scalar must already have been magicalized. |
554 | */ |
555 | STATIC void |
556 | S_require_errno(pTHX_ GV *gv) |
557 | { |
558 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
559 | |
560 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
561 | dSP; |
562 | PUTBACK; |
563 | ENTER; |
564 | save_scalar(gv); /* keep the value of $! */ |
84f1fa11 |
565 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
566 | newSVpvn("Errno",5), Nullsv); |
d2c93421 |
567 | LEAVE; |
568 | SPAGAIN; |
569 | stash = gv_stashpvn("Errno",5,FALSE); |
570 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
571 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
572 | } |
573 | } |
574 | |
954c1994 |
575 | /* |
576 | =for apidoc gv_stashpv |
577 | |
386d01d6 |
578 | Returns a pointer to the stash for a specified package. C<name> should |
579 | be a valid UTF-8 string. If C<create> is set then the package will be |
580 | created if it does not already exist. If C<create> is not set and the |
581 | package does not exist then NULL is returned. |
954c1994 |
582 | |
583 | =cut |
584 | */ |
585 | |
a0d0e21e |
586 | HV* |
864dbfa3 |
587 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
588 | { |
dc437b57 |
589 | return gv_stashpvn(name, strlen(name), create); |
590 | } |
591 | |
592 | HV* |
864dbfa3 |
593 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
594 | { |
46fc3d4c |
595 | char smallbuf[256]; |
596 | char *tmpbuf; |
a0d0e21e |
597 | HV *stash; |
598 | GV *tmpgv; |
dc437b57 |
599 | |
46fc3d4c |
600 | if (namelen + 3 < sizeof smallbuf) |
601 | tmpbuf = smallbuf; |
602 | else |
603 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
604 | Copy(name,tmpbuf,namelen,char); |
605 | tmpbuf[namelen++] = ':'; |
606 | tmpbuf[namelen++] = ':'; |
607 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
608 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
609 | if (tmpbuf != smallbuf) |
610 | Safefree(tmpbuf); |
a0d0e21e |
611 | if (!tmpgv) |
612 | return 0; |
613 | if (!GvHV(tmpgv)) |
614 | GvHV(tmpgv) = newHV(); |
615 | stash = GvHV(tmpgv); |
616 | if (!HvNAME(stash)) |
617 | HvNAME(stash) = savepv(name); |
618 | return stash; |
463ee0b2 |
619 | } |
620 | |
954c1994 |
621 | /* |
622 | =for apidoc gv_stashsv |
623 | |
386d01d6 |
624 | Returns a pointer to the stash for a specified package, which must be a |
625 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
626 | |
627 | =cut |
628 | */ |
629 | |
a0d0e21e |
630 | HV* |
864dbfa3 |
631 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
632 | { |
dc437b57 |
633 | register char *ptr; |
634 | STRLEN len; |
635 | ptr = SvPV(sv,len); |
636 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
637 | } |
638 | |
639 | |
463ee0b2 |
640 | GV * |
864dbfa3 |
641 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
79072805 |
642 | { |
08105a92 |
643 | register const char *name = nambeg; |
463ee0b2 |
644 | register GV *gv = 0; |
79072805 |
645 | GV**gvp; |
79072805 |
646 | I32 len; |
08105a92 |
647 | register const char *namend; |
463ee0b2 |
648 | HV *stash = 0; |
79072805 |
649 | |
c07a80fd |
650 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
651 | name++; |
652 | |
79072805 |
653 | for (namend = name; *namend; namend++) { |
1d7c1841 |
654 | if ((*namend == ':' && namend[1] == ':') |
655 | || (*namend == '\'' && namend[1])) |
463ee0b2 |
656 | { |
463ee0b2 |
657 | if (!stash) |
3280af22 |
658 | stash = PL_defstash; |
dc437b57 |
659 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
660 | return Nullgv; |
463ee0b2 |
661 | |
85e6fe83 |
662 | len = namend - name; |
663 | if (len > 0) { |
3c78fafa |
664 | char smallbuf[256]; |
62b57502 |
665 | char *tmpbuf; |
62b57502 |
666 | |
25c09a70 |
667 | if (len + 3 < sizeof (smallbuf)) |
3c78fafa |
668 | tmpbuf = smallbuf; |
62b57502 |
669 | else |
670 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
671 | Copy(name, tmpbuf, len, char); |
672 | tmpbuf[len++] = ':'; |
673 | tmpbuf[len++] = ':'; |
674 | tmpbuf[len] = '\0'; |
463ee0b2 |
675 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
676 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
677 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
678 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
679 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
680 | else |
681 | GvMULTI_on(gv); |
682 | } |
3c78fafa |
683 | if (tmpbuf != smallbuf) |
62b57502 |
684 | Safefree(tmpbuf); |
3280af22 |
685 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
686 | return Nullgv; |
85e6fe83 |
687 | |
463ee0b2 |
688 | if (!(stash = GvHV(gv))) |
689 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
690 | |
463ee0b2 |
691 | if (!HvNAME(stash)) |
a0d0e21e |
692 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
693 | } |
694 | |
695 | if (*namend == ':') |
696 | namend++; |
697 | namend++; |
698 | name = namend; |
699 | if (!*name) |
3280af22 |
700 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
701 | } |
79072805 |
702 | } |
a0d0e21e |
703 | len = namend - name; |
463ee0b2 |
704 | |
59f00321 |
705 | /* $_ should always be in main:: even when our'ed */ |
706 | if (*name == '_' && !name[1]) |
707 | stash = PL_defstash; |
708 | |
463ee0b2 |
709 | /* No stash in name, so see how we can default */ |
710 | |
711 | if (!stash) { |
7e2040f0 |
712 | if (isIDFIRST_lazy(name)) { |
9607fc9c |
713 | bool global = FALSE; |
714 | |
463ee0b2 |
715 | if (isUPPER(*name)) { |
9d116dd7 |
716 | if (*name == 'S' && ( |
717 | strEQ(name, "SIG") || |
718 | strEQ(name, "STDIN") || |
719 | strEQ(name, "STDOUT") || |
720 | strEQ(name, "STDERR"))) |
721 | global = TRUE; |
722 | else if (*name == 'I' && strEQ(name, "INC")) |
723 | global = TRUE; |
724 | else if (*name == 'E' && strEQ(name, "ENV")) |
725 | global = TRUE; |
463ee0b2 |
726 | else if (*name == 'A' && ( |
727 | strEQ(name, "ARGV") || |
9d116dd7 |
728 | strEQ(name, "ARGVOUT"))) |
463ee0b2 |
729 | global = TRUE; |
730 | } |
c99da370 |
731 | else if (*name == '_' && !name[1]) |
463ee0b2 |
732 | global = TRUE; |
9607fc9c |
733 | |
463ee0b2 |
734 | if (global) |
3280af22 |
735 | stash = PL_defstash; |
923e4eb5 |
736 | else if (IN_PERL_COMPILETIME) { |
3280af22 |
737 | stash = PL_curstash; |
738 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
739 | sv_type != SVt_PVCV && |
740 | sv_type != SVt_PVGV && |
4633a7c4 |
741 | sv_type != SVt_PVFM && |
c07a80fd |
742 | sv_type != SVt_PVIO && |
377b8fbc |
743 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
744 | { |
4633a7c4 |
745 | gvp = (GV**)hv_fetch(stash,name,len,0); |
746 | if (!gvp || |
3280af22 |
747 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
748 | SvTYPE(*gvp) != SVt_PVGV) |
749 | { |
4633a7c4 |
750 | stash = 0; |
a5f75d66 |
751 | } |
155aba94 |
752 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
753 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
754 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
755 | { |
cea2e8a9 |
756 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
757 | sv_type == SVt_PVAV ? '@' : |
758 | sv_type == SVt_PVHV ? '%' : '$', |
759 | name); |
8ebc5c01 |
760 | if (GvCVu(*gvp)) |
cc507455 |
761 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
762 | stash = 0; |
4633a7c4 |
763 | } |
a0d0e21e |
764 | } |
85e6fe83 |
765 | } |
463ee0b2 |
766 | else |
1d7c1841 |
767 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
768 | } |
769 | else |
3280af22 |
770 | stash = PL_defstash; |
463ee0b2 |
771 | } |
772 | |
773 | /* By this point we should have a stash and a name */ |
774 | |
a0d0e21e |
775 | if (!stash) { |
5a844595 |
776 | if (add) { |
608b3986 |
777 | register SV *err = Perl_mess(aTHX_ |
5a844595 |
778 | "Global symbol \"%s%s\" requires explicit package name", |
779 | (sv_type == SVt_PV ? "$" |
780 | : sv_type == SVt_PVAV ? "@" |
781 | : sv_type == SVt_PVHV ? "%" |
608b3986 |
782 | : ""), name); |
783 | if (USE_UTF8_IN_NAMES) |
784 | SvUTF8_on(err); |
785 | qerror(err); |
d7aacf4e |
786 | stash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV)); |
a0d0e21e |
787 | } |
d7aacf4e |
788 | else |
789 | return Nullgv; |
a0d0e21e |
790 | } |
791 | |
792 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
793 | return Nullgv; |
794 | |
79072805 |
795 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
796 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
797 | return Nullgv; |
798 | gv = *gvp; |
799 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
800 | if (add) { |
a5f75d66 |
801 | GvMULTI_on(gv); |
a0d0e21e |
802 | gv_init_sv(gv, sv_type); |
d2c93421 |
803 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
804 | require_errno(gv); |
a0d0e21e |
805 | } |
79072805 |
806 | return gv; |
55d729e4 |
807 | } else if (add & GV_NOINIT) { |
808 | return gv; |
79072805 |
809 | } |
93a17b20 |
810 | |
811 | /* Adding a new symbol */ |
812 | |
0453d815 |
813 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d |
814 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 |
815 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
816 | gv_init_sv(gv, sv_type); |
93a17b20 |
817 | |
7272584d |
818 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
819 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
820 | GvMULTI_on(gv) ; |
821 | |
93a17b20 |
822 | /* set up magic where warranted */ |
823 | switch (*name) { |
a0d0e21e |
824 | case 'A': |
825 | if (strEQ(name, "ARGV")) { |
826 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
827 | } |
828 | break; |
a0d0e21e |
829 | case 'E': |
830 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
831 | GvMULTI_on(gv); |
a0d0e21e |
832 | break; |
463ee0b2 |
833 | case 'I': |
834 | if (strEQ(name, "ISA")) { |
835 | AV* av = GvAVn(gv); |
a5f75d66 |
836 | GvMULTI_on(gv); |
14befaf4 |
837 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0); |
93965878 |
838 | /* NOTE: No support for tied ISA */ |
55d729e4 |
839 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
840 | && AvFILLp(av) == -1) |
85e6fe83 |
841 | { |
a0d0e21e |
842 | char *pname; |
79cb57f6 |
843 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
dc437b57 |
844 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
845 | av_push(av, newSVpvn(pname = "DB_File",7)); |
dc437b57 |
846 | gv_stashpvn(pname, 7, TRUE); |
79cb57f6 |
847 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
dc437b57 |
848 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
849 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
dc437b57 |
850 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
851 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
dc437b57 |
852 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
853 | } |
463ee0b2 |
854 | } |
855 | break; |
a0d0e21e |
856 | case 'O': |
857 | if (strEQ(name, "OVERLOAD")) { |
858 | HV* hv = GvHVn(gv); |
a5f75d66 |
859 | GvMULTI_on(gv); |
14befaf4 |
860 | hv_magic(hv, Nullgv, PERL_MAGIC_overload); |
a0d0e21e |
861 | } |
862 | break; |
93a17b20 |
863 | case 'S': |
864 | if (strEQ(name, "SIG")) { |
865 | HV *hv; |
dc437b57 |
866 | I32 i; |
1d7c1841 |
867 | if (!PL_psig_ptr) { |
0a8e0eff |
868 | Newz(73, PL_psig_ptr, SIG_SIZE, SV*); |
869 | Newz(73, PL_psig_name, SIG_SIZE, SV*); |
870 | Newz(73, PL_psig_pend, SIG_SIZE, int); |
1d7c1841 |
871 | } |
872 | GvMULTI_on(gv); |
873 | hv = GvHVn(gv); |
14befaf4 |
874 | hv_magic(hv, Nullgv, PERL_MAGIC_sig); |
76d3c696 |
875 | for (i = 1; i < SIG_SIZE; i++) { |
dc437b57 |
876 | SV ** init; |
1d7c1841 |
877 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
878 | if (init) |
879 | sv_setsv(*init, &PL_sv_undef); |
22c35a8c |
880 | PL_psig_ptr[i] = 0; |
881 | PL_psig_name[i] = 0; |
0a8e0eff |
882 | PL_psig_pend[i] = 0; |
dc437b57 |
883 | } |
93a17b20 |
884 | } |
885 | break; |
09bef843 |
886 | case 'V': |
887 | if (strEQ(name, "VERSION")) |
888 | GvMULTI_on(gv); |
889 | break; |
93a17b20 |
890 | |
891 | case '&': |
93a17b20 |
892 | case '`': |
93a17b20 |
893 | case '\'': |
b4a9608f |
894 | if ( |
895 | len > 1 || |
896 | sv_type == SVt_PVAV || |
897 | sv_type == SVt_PVHV || |
898 | sv_type == SVt_PVCV || |
b4a9608f |
899 | sv_type == SVt_PVFM || |
900 | sv_type == SVt_PVIO |
901 | ) { break; } |
3280af22 |
902 | PL_sawampersand = TRUE; |
a0d0e21e |
903 | goto ro_magicalize; |
93a17b20 |
904 | |
905 | case ':': |
463ee0b2 |
906 | if (len > 1) |
907 | break; |
3280af22 |
908 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 |
909 | goto magicalize; |
910 | |
ff0cee69 |
911 | case '?': |
912 | if (len > 1) |
913 | break; |
914 | #ifdef COMPLEX_STATUS |
07f14f54 |
915 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
ff0cee69 |
916 | #endif |
917 | goto magicalize; |
918 | |
067391ea |
919 | case '!': |
4318d5a0 |
920 | if (len > 1) |
067391ea |
921 | break; |
d2c93421 |
922 | |
923 | /* If %! has been used, automatically load Errno.pm. |
924 | The require will itself set errno, so in order to |
925 | preserve its value we have to set up the magic |
926 | now (rather than going to magicalize) |
927 | */ |
928 | |
14befaf4 |
929 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
930 | |
931 | if (sv_type == SVt_PVHV) |
932 | require_errno(gv); |
933 | |
934 | break; |
6cef1e77 |
935 | case '-': |
936 | if (len > 1) |
937 | break; |
938 | else { |
939 | AV* av = GvAVn(gv); |
14befaf4 |
940 | sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
941 | SvREADONLY_on(av); |
6cef1e77 |
942 | } |
943 | goto magicalize; |
a0d0e21e |
944 | case '*': |
f02c194e |
945 | if (len == 1 && sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) |
946 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
9b332a20 |
947 | "$* is no longer supported"); |
f02c194e |
948 | break; |
949 | case '#': |
950 | if (len == 1 && sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) |
951 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
952 | "Use of $# is deprecated"); |
a0d0e21e |
953 | /* FALL THROUGH */ |
954 | case '[': |
93a17b20 |
955 | case '^': |
956 | case '~': |
957 | case '=': |
93a17b20 |
958 | case '%': |
959 | case '.': |
93a17b20 |
960 | case '(': |
961 | case ')': |
962 | case '<': |
963 | case '>': |
964 | case ',': |
965 | case '\\': |
966 | case '/': |
16070b82 |
967 | case '\001': /* $^A */ |
968 | case '\003': /* $^C */ |
969 | case '\004': /* $^D */ |
16070b82 |
970 | case '\006': /* $^F */ |
971 | case '\010': /* $^H */ |
972 | case '\011': /* $^I, NOT \t in EBCDIC */ |
a01268b5 |
973 | case '\016': /* $^N */ |
16070b82 |
974 | case '\020': /* $^P */ |
463ee0b2 |
975 | if (len > 1) |
976 | break; |
977 | goto magicalize; |
d8ce0c9a |
978 | case '|': |
979 | if (len > 1) |
980 | break; |
981 | sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
982 | goto magicalize; |
0a378802 |
983 | case '\005': /* $^E && $^ENCODING */ |
984 | if (len > 1 && strNE(name, "\005NCODING")) |
985 | break; |
986 | goto magicalize; |
987 | |
ac27b0f5 |
988 | case '\017': /* $^O & $^OPEN */ |
989 | if (len > 1 && strNE(name, "\017PEN")) |
990 | break; |
991 | goto magicalize; |
16070b82 |
992 | case '\023': /* $^S */ |
6cef1e77 |
993 | if (len > 1) |
994 | break; |
995 | goto ro_magicalize; |
eb27b65e |
996 | case '\024': /* $^T, ${^TAINT} */ |
7c36658b |
997 | if (len == 1) |
998 | goto magicalize; |
999 | else if (strEQ(name, "\024AINT")) |
1000 | goto ro_magicalize; |
1001 | else |
1002 | break; |
fde18df1 |
1003 | case '\025': |
a05d7ebb |
1004 | if (len > 1 && strNE(name, "\025NICODE")) |
fde18df1 |
1005 | break; |
1006 | goto ro_magicalize; |
1007 | |
6a818117 |
1008 | case '\027': /* $^W & $^WARNING_BITS */ |
fde18df1 |
1009 | if (len > 1 |
1010 | && strNE(name, "\027ARNING_BITS") |
1011 | ) |
4438c4b7 |
1012 | break; |
1013 | goto magicalize; |
463ee0b2 |
1014 | |
a0d0e21e |
1015 | case '+': |
6cef1e77 |
1016 | if (len > 1) |
1017 | break; |
1018 | else { |
1019 | AV* av = GvAVn(gv); |
14befaf4 |
1020 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
1021 | SvREADONLY_on(av); |
6cef1e77 |
1022 | } |
1023 | /* FALL THROUGH */ |
463ee0b2 |
1024 | case '1': |
1025 | case '2': |
1026 | case '3': |
1027 | case '4': |
1028 | case '5': |
1029 | case '6': |
1030 | case '7': |
1031 | case '8': |
1032 | case '9': |
e521374c |
1033 | /* ensures variable is only digits */ |
1034 | /* ${"1foo"} fails this test (and is thus writeable) */ |
1035 | /* added by japhy, but borrowed from is_gv_magical */ |
1036 | |
1037 | if (len > 1) { |
1038 | const char *end = name + len; |
1039 | while (--end > name) { |
1040 | if (!isDIGIT(*end)) return gv; |
1041 | } |
1042 | } |
1043 | |
a0d0e21e |
1044 | ro_magicalize: |
1045 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
1046 | magicalize: |
14befaf4 |
1047 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
93a17b20 |
1048 | break; |
1049 | |
16070b82 |
1050 | case '\014': /* $^L */ |
463ee0b2 |
1051 | if (len > 1) |
1052 | break; |
93a17b20 |
1053 | sv_setpv(GvSV(gv),"\f"); |
3280af22 |
1054 | PL_formfeed = GvSV(gv); |
93a17b20 |
1055 | break; |
1056 | case ';': |
463ee0b2 |
1057 | if (len > 1) |
1058 | break; |
93a17b20 |
1059 | sv_setpv(GvSV(gv),"\034"); |
1060 | break; |
463ee0b2 |
1061 | case ']': |
1062 | if (len == 1) { |
f86702cc |
1063 | SV *sv = GvSV(gv); |
d7aa5382 |
1064 | if (!sv_derived_from(PL_patchlevel, "version")) |
1065 | (void *)upg_version(PL_patchlevel); |
7d54d38e |
1066 | GvSV(gv) = vnumify(PL_patchlevel); |
1067 | SvREADONLY_on(GvSV(gv)); |
1068 | SvREFCNT_dec(sv); |
93a17b20 |
1069 | } |
1070 | break; |
16070b82 |
1071 | case '\026': /* $^V */ |
1072 | if (len == 1) { |
1073 | SV *sv = GvSV(gv); |
f9be5ac8 |
1074 | GvSV(gv) = new_version(PL_patchlevel); |
1075 | SvREADONLY_on(GvSV(gv)); |
1076 | SvREFCNT_dec(sv); |
16070b82 |
1077 | } |
1078 | break; |
79072805 |
1079 | } |
93a17b20 |
1080 | return gv; |
79072805 |
1081 | } |
1082 | |
1083 | void |
43693395 |
1084 | Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
1085 | { |
e27ad1f2 |
1086 | char *name; |
43693395 |
1087 | HV *hv = GvSTASH(gv); |
1088 | if (!hv) { |
0c34ef67 |
1089 | SvOK_off(sv); |
43693395 |
1090 | return; |
1091 | } |
1092 | sv_setpv(sv, prefix ? prefix : ""); |
e27ad1f2 |
1093 | |
1094 | if (!HvNAME(hv)) |
1095 | name = "__ANON__"; |
1096 | else |
1097 | name = HvNAME(hv); |
1098 | if (keepmain || strNE(name, "main")) { |
1099 | sv_catpv(sv,name); |
43693395 |
1100 | sv_catpvn(sv,"::", 2); |
1101 | } |
257984c0 |
1102 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 |
1103 | } |
1104 | |
1105 | void |
864dbfa3 |
1106 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
1107 | { |
84e79d79 |
1108 | gv_fullname4(sv, gv, prefix, TRUE); |
79072805 |
1109 | } |
1110 | |
1111 | void |
43693395 |
1112 | Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
1113 | { |
1114 | GV *egv = GvEGV(gv); |
1115 | if (!egv) |
1116 | egv = gv; |
1117 | gv_fullname4(sv, egv, prefix, keepmain); |
1118 | } |
1119 | |
1120 | void |
864dbfa3 |
1121 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
1122 | { |
84e79d79 |
1123 | gv_efullname4(sv, gv, prefix, TRUE); |
f6aff53a |
1124 | } |
1125 | |
1126 | /* XXX compatibility with versions <= 5.003. */ |
1127 | void |
864dbfa3 |
1128 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
1129 | { |
1130 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
1131 | } |
1132 | |
1133 | /* XXX compatibility with versions <= 5.003. */ |
1134 | void |
864dbfa3 |
1135 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
1136 | { |
1137 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
1138 | } |
1139 | |
1140 | IO * |
864dbfa3 |
1141 | Perl_newIO(pTHX) |
79072805 |
1142 | { |
1143 | IO *io; |
8990e307 |
1144 | GV *iogv; |
1145 | |
1146 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
1147 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
1148 | SvREFCNT(io) = 1; |
1149 | SvOBJECT_on(io); |
081fc587 |
1150 | /* Clear the stashcache because a new IO could overrule a |
1151 | package name */ |
1152 | hv_clear(PL_stashcache); |
c9de509e |
1153 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d |
1154 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1155 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
c9de509e |
1156 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
1157 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
1158 | return io; |
1159 | } |
1160 | |
1161 | void |
864dbfa3 |
1162 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1163 | { |
1164 | register HE *entry; |
1165 | register I32 i; |
1166 | register GV *gv; |
463ee0b2 |
1167 | HV *hv; |
1168 | |
8990e307 |
1169 | if (!HvARRAY(stash)) |
1170 | return; |
a0d0e21e |
1171 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
1172 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
1173 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f |
1174 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e |
1175 | { |
19b6c847 |
1176 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1177 | gv_check(hv); /* nested package */ |
1178 | } |
dc437b57 |
1179 | else if (isALPHA(*HeKEY(entry))) { |
1d7c1841 |
1180 | char *file; |
dc437b57 |
1181 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1182 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1183 | continue; |
1d7c1841 |
1184 | file = GvFILE(gv); |
1185 | /* performance hack: if filename is absolute and it's a standard |
1186 | * module, don't bother warning */ |
1187 | if (file |
1188 | && PERL_FILE_IS_ABSOLUTE(file) |
6eb630b7 |
1189 | #ifdef MACOS_TRADITIONAL |
1190 | && (instr(file, ":lib:") |
1191 | #else |
1192 | && (instr(file, "/lib/") |
1193 | #endif |
1194 | || instr(file, ".pm"))) |
1d7c1841 |
1195 | { |
8990e307 |
1196 | continue; |
1d7c1841 |
1197 | } |
1198 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1199 | #ifdef USE_ITHREADS |
1200 | CopFILE(PL_curcop) = file; /* set for warning */ |
1201 | #else |
1202 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1203 | #endif |
9014280d |
1204 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 |
1205 | "Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
1206 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
1207 | } |
79072805 |
1208 | } |
1209 | } |
1210 | } |
1211 | |
1212 | GV * |
864dbfa3 |
1213 | Perl_newGVgen(pTHX_ char *pack) |
79072805 |
1214 | { |
cea2e8a9 |
1215 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1216 | TRUE, SVt_PVGV); |
79072805 |
1217 | } |
1218 | |
1219 | /* hopefully this is only called on local symbol table entries */ |
1220 | |
1221 | GP* |
864dbfa3 |
1222 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1223 | { |
1d7c1841 |
1224 | if (!gp) |
1225 | return (GP*)NULL; |
79072805 |
1226 | gp->gp_refcnt++; |
44a8e56a |
1227 | if (gp->gp_cv) { |
1228 | if (gp->gp_cvgen) { |
1229 | /* multi-named GPs cannot be used for method cache */ |
1230 | SvREFCNT_dec(gp->gp_cv); |
1231 | gp->gp_cv = Nullcv; |
1232 | gp->gp_cvgen = 0; |
1233 | } |
1234 | else { |
1235 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1236 | PL_sub_generation++; |
44a8e56a |
1237 | } |
1238 | } |
79072805 |
1239 | return gp; |
79072805 |
1240 | } |
1241 | |
1242 | void |
864dbfa3 |
1243 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1244 | { |
79072805 |
1245 | GP* gp; |
1246 | |
1247 | if (!gv || !(gp = GvGP(gv))) |
1248 | return; |
f248d071 |
1249 | if (gp->gp_refcnt == 0) { |
1250 | if (ckWARN_d(WARN_INTERNAL)) |
9014280d |
1251 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc |
1252 | "Attempt to free unreferenced glob pointers" |
1253 | pTHX__FORMAT pTHX__VALUE); |
79072805 |
1254 | return; |
1255 | } |
44a8e56a |
1256 | if (gp->gp_cv) { |
1257 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1258 | PL_sub_generation++; |
44a8e56a |
1259 | } |
748a9306 |
1260 | if (--gp->gp_refcnt > 0) { |
1261 | if (gp->gp_egv == gv) |
1262 | gp->gp_egv = 0; |
79072805 |
1263 | return; |
748a9306 |
1264 | } |
79072805 |
1265 | |
13207a71 |
1266 | if (gp->gp_sv) SvREFCNT_dec(gp->gp_sv); |
8926f269 |
1267 | if (gp->gp_av) SvREFCNT_dec(gp->gp_av); |
13207a71 |
1268 | if (gp->gp_hv) { |
1269 | if (PL_stashcache && HvNAME(gp->gp_hv)) |
1270 | hv_delete(PL_stashcache, |
1271 | HvNAME(gp->gp_hv), strlen(HvNAME(gp->gp_hv)), |
1272 | G_DISCARD); |
1273 | SvREFCNT_dec(gp->gp_hv); |
1274 | } |
1275 | if (gp->gp_io) SvREFCNT_dec(gp->gp_io); |
1276 | if (gp->gp_cv) SvREFCNT_dec(gp->gp_cv); |
1277 | if (gp->gp_form) SvREFCNT_dec(gp->gp_form); |
748a9306 |
1278 | |
79072805 |
1279 | Safefree(gp); |
1280 | GvGP(gv) = 0; |
1281 | } |
1282 | |
d460ef45 |
1283 | int |
1284 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1285 | { |
1286 | AMT *amtp = (AMT*)mg->mg_ptr; |
1287 | if (amtp && AMT_AMAGIC(amtp)) { |
1288 | int i; |
1289 | for (i = 1; i < NofAMmeth; i++) { |
1290 | CV *cv = amtp->table[i]; |
1291 | if (cv != Nullcv) { |
1292 | SvREFCNT_dec((SV *) cv); |
1293 | amtp->table[i] = Nullcv; |
1294 | } |
1295 | } |
1296 | } |
1297 | return 0; |
1298 | } |
1299 | |
a0d0e21e |
1300 | /* Updates and caches the CV's */ |
1301 | |
1302 | bool |
864dbfa3 |
1303 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1304 | { |
a0d0e21e |
1305 | GV* gv; |
1306 | CV* cv; |
14befaf4 |
1307 | MAGIC* mg=mg_find((SV*)stash, PERL_MAGIC_overload_table); |
8ac85365 |
1308 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1309 | AMT amt; |
a0d0e21e |
1310 | |
3280af22 |
1311 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1312 | && amtp->was_ok_sub == PL_sub_generation) |
eb160463 |
1313 | return (bool)AMT_OVERLOADED(amtp); |
14befaf4 |
1314 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e |
1315 | |
cea2e8a9 |
1316 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
a0d0e21e |
1317 | |
d460ef45 |
1318 | Zero(&amt,1,AMT); |
3280af22 |
1319 | amt.was_ok_am = PL_amagic_generation; |
1320 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1321 | amt.fallback = AMGfallNO; |
1322 | amt.flags = 0; |
1323 | |
a6006777 |
1324 | { |
32251b26 |
1325 | int filled = 0, have_ovl = 0; |
1326 | int i, lim = 1; |
a6006777 |
1327 | SV* sv = NULL; |
a6006777 |
1328 | |
22c35a8c |
1329 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1330 | |
89ffc314 |
1331 | /* Try to find via inheritance. */ |
1332 | gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1333 | if (gv) |
1334 | sv = GvSV(gv); |
1335 | |
1336 | if (!gv) |
32251b26 |
1337 | lim = DESTROY_amg; /* Skip overloading entries. */ |
89ffc314 |
1338 | else if (SvTRUE(sv)) |
1339 | amt.fallback=AMGfallYES; |
1340 | else if (SvOK(sv)) |
1341 | amt.fallback=AMGfallNEVER; |
a6006777 |
1342 | |
32251b26 |
1343 | for (i = 1; i < lim; i++) |
1344 | amt.table[i] = Nullcv; |
1345 | for (; i < NofAMmeth; i++) { |
c8ce92fc |
1346 | char *cooky = (char*)PL_AMG_names[i]; |
32251b26 |
1347 | /* Human-readable form, for debugging: */ |
1348 | char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
89ffc314 |
1349 | STRLEN l = strlen(cooky); |
1350 | |
cea2e8a9 |
1351 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
44a8e56a |
1352 | cp, HvNAME(stash)) ); |
611c1e95 |
1353 | /* don't fill the cache while looking up! |
1354 | Creation of inheritance stubs in intermediate packages may |
1355 | conflict with the logic of runtime method substitution. |
1356 | Indeed, for inheritance A -> B -> C, if C overloads "+0", |
1357 | then we could have created stubs for "(+0" in A and C too. |
1358 | But if B overloads "bool", we may want to use it for |
1359 | numifying instead of C's "+0". */ |
1360 | if (i >= DESTROY_amg) |
1361 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); |
1362 | else /* Autoload taken care of below */ |
1363 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); |
46fc3d4c |
1364 | cv = 0; |
89ffc314 |
1365 | if (gv && (cv = GvCV(gv))) { |
44a8e56a |
1366 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1367 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 |
1368 | /* This is a hack to support autoloading..., while |
1369 | knowing *which* methods were declared as overloaded. */ |
44a8e56a |
1370 | /* GvSV contains the name of the method. */ |
4ea42e7f |
1371 | GV *ngv = Nullgv; |
44a8e56a |
1372 | |
84c133a0 |
1373 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%"SVf256\ |
1374 | "' for overloaded `%s' in package `%.256s'\n", |
35c1215d |
1375 | GvSV(gv), cp, HvNAME(stash)) ); |
b267980d |
1376 | if (!SvPOK(GvSV(gv)) |
dc848c6f |
1377 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1378 | FALSE))) |
1379 | { |
44a8e56a |
1380 | /* Can be an import stub (created by `can'). */ |
35c1215d |
1381 | SV *gvsv = GvSV(gv); |
1382 | const char *name = SvPOK(gvsv) ? SvPVX(gvsv) : "???"; |
84c133a0 |
1383 | Perl_croak(aTHX_ "%s method `%.256s' overloading `%s' "\ |
1384 | "in package `%.256s'", |
35c1215d |
1385 | (GvCVGEN(gv) ? "Stub found while resolving" |
1386 | : "Can't resolve"), |
1387 | name, cp, HvNAME(stash)); |
44a8e56a |
1388 | } |
dc848c6f |
1389 | cv = GvCV(gv = ngv); |
44a8e56a |
1390 | } |
cea2e8a9 |
1391 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
44a8e56a |
1392 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1393 | GvNAME(CvGV(cv))) ); |
1394 | filled = 1; |
32251b26 |
1395 | if (i < DESTROY_amg) |
1396 | have_ovl = 1; |
611c1e95 |
1397 | } else if (gv) { /* Autoloaded... */ |
1398 | cv = (CV*)gv; |
1399 | filled = 1; |
44a8e56a |
1400 | } |
a6006777 |
1401 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1402 | } |
a0d0e21e |
1403 | if (filled) { |
a6006777 |
1404 | AMT_AMAGIC_on(&amt); |
32251b26 |
1405 | if (have_ovl) |
1406 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1407 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1408 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1409 | return have_ovl; |
a0d0e21e |
1410 | } |
1411 | } |
a6006777 |
1412 | /* Here we have no table: */ |
9cbac4c7 |
1413 | /* no_table: */ |
a6006777 |
1414 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1415 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1416 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1417 | return FALSE; |
1418 | } |
1419 | |
32251b26 |
1420 | |
1421 | CV* |
1422 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1423 | { |
3f8f4626 |
1424 | MAGIC *mg; |
32251b26 |
1425 | AMT *amtp; |
3ad83ce7 |
1426 | CV *ret; |
32251b26 |
1427 | |
e27ad1f2 |
1428 | if (!stash || !HvNAME(stash)) |
3f8f4626 |
1429 | return Nullcv; |
14befaf4 |
1430 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1431 | if (!mg) { |
1432 | do_update: |
1433 | Gv_AMupdate(stash); |
14befaf4 |
1434 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1435 | } |
1436 | amtp = (AMT*)mg->mg_ptr; |
1437 | if ( amtp->was_ok_am != PL_amagic_generation |
1438 | || amtp->was_ok_sub != PL_sub_generation ) |
1439 | goto do_update; |
3ad83ce7 |
1440 | if (AMT_AMAGIC(amtp)) { |
1441 | ret = amtp->table[id]; |
1442 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1443 | /* Passing it through may have resulted in a warning |
1444 | "Inherited AUTOLOAD for a non-method deprecated", since |
1445 | our caller is going through a function call, not a method call. |
1446 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ |
1447 | GV *gv = gv_fetchmethod(stash, (char*)PL_AMG_names[id]); |
1448 | |
1449 | if (gv && GvCV(gv)) |
1450 | return GvCV(gv); |
1451 | } |
1452 | return ret; |
1453 | } |
1454 | |
32251b26 |
1455 | return Nullcv; |
1456 | } |
1457 | |
1458 | |
a0d0e21e |
1459 | SV* |
864dbfa3 |
1460 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1461 | { |
b267980d |
1462 | MAGIC *mg; |
9c5ffd7c |
1463 | CV *cv=NULL; |
a0d0e21e |
1464 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1465 | AMT *amtp=NULL, *oamtp=NULL; |
497b47a8 |
1466 | int off=0, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
ee239bfe |
1467 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
497b47a8 |
1468 | #ifdef DEBUGGING |
1469 | int fl=0; |
497b47a8 |
1470 | #endif |
25716404 |
1471 | HV* stash=NULL; |
a0d0e21e |
1472 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 |
1473 | && (stash = SvSTASH(SvRV(left))) |
1474 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1475 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1476 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1477 | : (CV **) NULL)) |
b267980d |
1478 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1479 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1480 | * usual method */ |
497b47a8 |
1481 | ( |
1482 | #ifdef DEBUGGING |
1483 | fl = 1, |
1484 | #endif |
1485 | cv = cvp[off=method])))) { |
a0d0e21e |
1486 | lr = -1; /* Call method for left argument */ |
1487 | } else { |
1488 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1489 | int logic; |
1490 | |
1491 | /* look for substituted methods */ |
ee239bfe |
1492 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1493 | switch (method) { |
1494 | case inc_amg: |
ee239bfe |
1495 | force_cpy = 1; |
1496 | if ((cv = cvp[off=add_ass_amg]) |
1497 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1498 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1499 | } |
1500 | break; |
1501 | case dec_amg: |
ee239bfe |
1502 | force_cpy = 1; |
1503 | if ((cv = cvp[off = subtr_ass_amg]) |
1504 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1505 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1506 | } |
1507 | break; |
1508 | case bool__amg: |
1509 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1510 | break; |
1511 | case numer_amg: |
1512 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1513 | break; |
1514 | case string_amg: |
1515 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1516 | break; |
dc437b57 |
1517 | case not_amg: |
b267980d |
1518 | (void)((cv = cvp[off=bool__amg]) |
dc437b57 |
1519 | || (cv = cvp[off=numer_amg]) |
1520 | || (cv = cvp[off=string_amg])); |
1521 | postpr = 1; |
1522 | break; |
748a9306 |
1523 | case copy_amg: |
1524 | { |
76e3520e |
1525 | /* |
1526 | * SV* ref causes confusion with the interpreter variable of |
1527 | * the same name |
1528 | */ |
1529 | SV* tmpRef=SvRV(left); |
1530 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1531 | /* |
1532 | * Just to be extra cautious. Maybe in some |
1533 | * additional cases sv_setsv is safe, too. |
1534 | */ |
76e3520e |
1535 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1536 | SvOBJECT_on(newref); |
76e3520e |
1537 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1538 | return newref; |
1539 | } |
1540 | } |
1541 | break; |
a0d0e21e |
1542 | case abs_amg: |
b267980d |
1543 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1544 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1545 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1546 | if (off1==lt_amg) { |
748a9306 |
1547 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1548 | lt_amg,AMGf_noright); |
1549 | logic = SvTRUE(lessp); |
1550 | } else { |
748a9306 |
1551 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1552 | ncmp_amg,AMGf_noright); |
1553 | logic = (SvNV(lessp) < 0); |
1554 | } |
1555 | if (logic) { |
1556 | if (off==subtr_amg) { |
1557 | right = left; |
748a9306 |
1558 | left = nullsv; |
a0d0e21e |
1559 | lr = 1; |
1560 | } |
1561 | } else { |
1562 | return left; |
1563 | } |
1564 | } |
1565 | break; |
1566 | case neg_amg: |
155aba94 |
1567 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1568 | right = left; |
1569 | left = sv_2mortal(newSViv(0)); |
1570 | lr = 1; |
1571 | } |
1572 | break; |
f216259d |
1573 | case int_amg: |
f5284f61 |
1574 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1575 | /* FAIL safe */ |
1576 | return NULL; /* Delegate operation to standard mechanisms. */ |
1577 | break; |
f5284f61 |
1578 | case to_sv_amg: |
1579 | case to_av_amg: |
1580 | case to_hv_amg: |
1581 | case to_gv_amg: |
1582 | case to_cv_amg: |
1583 | /* FAIL safe */ |
b267980d |
1584 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1585 | break; |
a0d0e21e |
1586 | default: |
1587 | goto not_found; |
1588 | } |
1589 | if (!cv) goto not_found; |
1590 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
25716404 |
1591 | && (stash = SvSTASH(SvRV(right))) |
1592 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1593 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1594 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1595 | : (CV **) NULL)) |
a0d0e21e |
1596 | && (cv = cvp[off=method])) { /* Method for right |
1597 | * argument found */ |
1598 | lr=1; |
b267980d |
1599 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1600 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1601 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1602 | && !(flags & AMGf_unary)) { |
1603 | /* We look for substitution for |
1604 | * comparison operations and |
fc36a67e |
1605 | * concatenation */ |
a0d0e21e |
1606 | if (method==concat_amg || method==concat_ass_amg |
1607 | || method==repeat_amg || method==repeat_ass_amg) { |
1608 | return NULL; /* Delegate operation to string conversion */ |
1609 | } |
1610 | off = -1; |
1611 | switch (method) { |
1612 | case lt_amg: |
1613 | case le_amg: |
1614 | case gt_amg: |
1615 | case ge_amg: |
1616 | case eq_amg: |
1617 | case ne_amg: |
1618 | postpr = 1; off=ncmp_amg; break; |
1619 | case slt_amg: |
1620 | case sle_amg: |
1621 | case sgt_amg: |
1622 | case sge_amg: |
1623 | case seq_amg: |
1624 | case sne_amg: |
1625 | postpr = 1; off=scmp_amg; break; |
1626 | } |
1627 | if (off != -1) cv = cvp[off]; |
1628 | if (!cv) { |
1629 | goto not_found; |
1630 | } |
1631 | } else { |
a6006777 |
1632 | not_found: /* No method found, either report or croak */ |
b267980d |
1633 | switch (method) { |
1634 | case to_sv_amg: |
1635 | case to_av_amg: |
1636 | case to_hv_amg: |
1637 | case to_gv_amg: |
1638 | case to_cv_amg: |
1639 | /* FAIL safe */ |
1640 | return left; /* Delegate operation to standard mechanisms. */ |
1641 | break; |
1642 | } |
a0d0e21e |
1643 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1644 | notfound = 1; lr = -1; |
1645 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1646 | notfound = 1; lr = 1; |
1647 | } else { |
46fc3d4c |
1648 | SV *msg; |
774d564b |
1649 | if (off==-1) off=method; |
b267980d |
1650 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
46fc3d4c |
1651 | "Operation `%s': no method found,%sargument %s%s%s%s", |
89ffc314 |
1652 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1653 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1654 | SvAMAGIC(left)? |
a0d0e21e |
1655 | "in overloaded package ": |
1656 | "has no overloaded magic", |
b267980d |
1657 | SvAMAGIC(left)? |
a0d0e21e |
1658 | HvNAME(SvSTASH(SvRV(left))): |
1659 | "", |
b267980d |
1660 | SvAMAGIC(right)? |
e7ea3e70 |
1661 | ",\n\tright argument in overloaded package ": |
b267980d |
1662 | (flags & AMGf_unary |
e7ea3e70 |
1663 | ? "" |
1664 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1665 | SvAMAGIC(right)? |
a0d0e21e |
1666 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1667 | "")); |
a0d0e21e |
1668 | if (amtp && amtp->fallback >= AMGfallYES) { |
cea2e8a9 |
1669 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
a0d0e21e |
1670 | } else { |
894356b3 |
1671 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1672 | } |
1673 | return NULL; |
1674 | } |
ee239bfe |
1675 | force_cpy = force_cpy || assign; |
a0d0e21e |
1676 | } |
1677 | } |
497b47a8 |
1678 | #ifdef DEBUGGING |
a0d0e21e |
1679 | if (!notfound) { |
497b47a8 |
1680 | DEBUG_o(Perl_deb(aTHX_ |
1681 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
1682 | AMG_id2name(off), |
1683 | method+assignshift==off? "" : |
1684 | " (initially `", |
1685 | method+assignshift==off? "" : |
1686 | AMG_id2name(method+assignshift), |
1687 | method+assignshift==off? "" : "')", |
1688 | flags & AMGf_unary? "" : |
1689 | lr==1 ? " for right argument": " for left argument", |
1690 | flags & AMGf_unary? " for argument" : "", |
25716404 |
1691 | stash ? HvNAME(stash) : "null", |
497b47a8 |
1692 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1693 | } |
497b47a8 |
1694 | #endif |
748a9306 |
1695 | /* Since we use shallow copy during assignment, we need |
1696 | * to dublicate the contents, probably calling user-supplied |
1697 | * version of copy operator |
1698 | */ |
ee239bfe |
1699 | /* We need to copy in following cases: |
1700 | * a) Assignment form was called. |
1701 | * assignshift==1, assign==T, method + 1 == off |
1702 | * b) Increment or decrement, called directly. |
1703 | * assignshift==0, assign==0, method + 0 == off |
1704 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1705 | * assignshift==0, assign==T, |
ee239bfe |
1706 | * force_cpy == T |
1707 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1708 | * assignshift==0, assign==0, |
ee239bfe |
1709 | * force_cpy == T |
1710 | * e) Assignment form translated to nomethod. |
1711 | * assignshift==1, assign==T, method + 1 != off |
1712 | * force_cpy == T |
1713 | */ |
1714 | /* off is method, method+assignshift, or a result of opcode substitution. |
1715 | * In the latter case assignshift==0, so only notfound case is important. |
1716 | */ |
1717 | if (( (method + assignshift == off) |
1718 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1719 | || force_cpy) |
1720 | RvDEEPCP(left); |
a0d0e21e |
1721 | { |
1722 | dSP; |
1723 | BINOP myop; |
1724 | SV* res; |
54310121 |
1725 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1726 | |
54310121 |
1727 | CATCH_SET(TRUE); |
a0d0e21e |
1728 | Zero(&myop, 1, BINOP); |
1729 | myop.op_last = (OP *) &myop; |
1730 | myop.op_next = Nullop; |
54310121 |
1731 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1732 | |
e788e7d3 |
1733 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1734 | ENTER; |
462e5cf6 |
1735 | SAVEOP(); |
533c011a |
1736 | PL_op = (OP *) &myop; |
3280af22 |
1737 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1738 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1739 | PUTBACK; |
cea2e8a9 |
1740 | pp_pushmark(); |
a0d0e21e |
1741 | |
924508f0 |
1742 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1743 | PUSHs(lr>0? right: left); |
1744 | PUSHs(lr>0? left: right); |
3280af22 |
1745 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1746 | if (notfound) { |
89ffc314 |
1747 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1748 | } |
1749 | PUSHs((SV*)cv); |
1750 | PUTBACK; |
1751 | |
155aba94 |
1752 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1753 | CALLRUNOPS(aTHX); |
a0d0e21e |
1754 | LEAVE; |
1755 | SPAGAIN; |
1756 | |
1757 | res=POPs; |
ebafeae7 |
1758 | PUTBACK; |
d3acc0f7 |
1759 | POPSTACK; |
54310121 |
1760 | CATCH_SET(oldcatch); |
a0d0e21e |
1761 | |
a0d0e21e |
1762 | if (postpr) { |
9c5ffd7c |
1763 | int ans=0; |
a0d0e21e |
1764 | switch (method) { |
1765 | case le_amg: |
1766 | case sle_amg: |
1767 | ans=SvIV(res)<=0; break; |
1768 | case lt_amg: |
1769 | case slt_amg: |
1770 | ans=SvIV(res)<0; break; |
1771 | case ge_amg: |
1772 | case sge_amg: |
1773 | ans=SvIV(res)>=0; break; |
1774 | case gt_amg: |
1775 | case sgt_amg: |
1776 | ans=SvIV(res)>0; break; |
1777 | case eq_amg: |
1778 | case seq_amg: |
1779 | ans=SvIV(res)==0; break; |
1780 | case ne_amg: |
1781 | case sne_amg: |
1782 | ans=SvIV(res)!=0; break; |
1783 | case inc_amg: |
1784 | case dec_amg: |
bbce6d69 |
1785 | SvSetSV(left,res); return left; |
dc437b57 |
1786 | case not_amg: |
fe7ac86a |
1787 | ans=!SvTRUE(res); break; |
a0d0e21e |
1788 | } |
54310121 |
1789 | return boolSV(ans); |
748a9306 |
1790 | } else if (method==copy_amg) { |
1791 | if (!SvROK(res)) { |
cea2e8a9 |
1792 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1793 | } |
1794 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1795 | } else { |
1796 | return res; |
1797 | } |
1798 | } |
1799 | } |
c9d5ac95 |
1800 | |
1801 | /* |
1802 | =for apidoc is_gv_magical |
1803 | |
1804 | Returns C<TRUE> if given the name of a magical GV. |
1805 | |
1806 | Currently only useful internally when determining if a GV should be |
1807 | created even in rvalue contexts. |
1808 | |
1809 | C<flags> is not used at present but available for future extension to |
1810 | allow selecting particular classes of magical variable. |
1811 | |
1812 | =cut |
1813 | */ |
1814 | bool |
1815 | Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) |
1816 | { |
1817 | if (!len) |
1818 | return FALSE; |
1819 | |
1820 | switch (*name) { |
1821 | case 'I': |
1822 | if (len == 3 && strEQ(name, "ISA")) |
1823 | goto yes; |
1824 | break; |
1825 | case 'O': |
1826 | if (len == 8 && strEQ(name, "OVERLOAD")) |
1827 | goto yes; |
1828 | break; |
1829 | case 'S': |
1830 | if (len == 3 && strEQ(name, "SIG")) |
1831 | goto yes; |
1832 | break; |
ac27b0f5 |
1833 | case '\017': /* $^O & $^OPEN */ |
1834 | if (len == 1 |
563aca73 |
1835 | || (len == 4 && strEQ(name, "\017PEN"))) |
ac27b0f5 |
1836 | { |
1837 | goto yes; |
1838 | } |
1839 | break; |
fde18df1 |
1840 | case '\025': |
a05d7ebb |
1841 | if (len > 1 && strEQ(name, "\025NICODE")) |
fde18df1 |
1842 | goto yes; |
c9d5ac95 |
1843 | case '\027': /* $^W & $^WARNING_BITS */ |
1844 | if (len == 1 |
1845 | || (len == 12 && strEQ(name, "\027ARNING_BITS")) |
fde18df1 |
1846 | ) |
c9d5ac95 |
1847 | { |
1848 | goto yes; |
1849 | } |
1850 | break; |
1851 | |
1852 | case '&': |
1853 | case '`': |
1854 | case '\'': |
1855 | case ':': |
1856 | case '?': |
1857 | case '!': |
1858 | case '-': |
1859 | case '#': |
c9d5ac95 |
1860 | case '[': |
1861 | case '^': |
1862 | case '~': |
1863 | case '=': |
1864 | case '%': |
1865 | case '.': |
1866 | case '(': |
1867 | case ')': |
1868 | case '<': |
1869 | case '>': |
1870 | case ',': |
1871 | case '\\': |
1872 | case '/': |
1873 | case '|': |
1874 | case '+': |
1875 | case ';': |
1876 | case ']': |
1877 | case '\001': /* $^A */ |
1878 | case '\003': /* $^C */ |
1879 | case '\004': /* $^D */ |
1880 | case '\005': /* $^E */ |
1881 | case '\006': /* $^F */ |
1882 | case '\010': /* $^H */ |
1883 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1884 | case '\014': /* $^L */ |
a01268b5 |
1885 | case '\016': /* $^N */ |
c9d5ac95 |
1886 | case '\020': /* $^P */ |
1887 | case '\023': /* $^S */ |
c9d5ac95 |
1888 | case '\026': /* $^V */ |
1889 | if (len == 1) |
1890 | goto yes; |
1891 | break; |
eb27b65e |
1892 | case '\024': /* $^T, ${^TAINT} */ |
1893 | if (len == 1 || strEQ(name, "\024AINT")) |
1894 | goto yes; |
1895 | break; |
c9d5ac95 |
1896 | case '1': |
1897 | case '2': |
1898 | case '3': |
1899 | case '4': |
1900 | case '5': |
1901 | case '6': |
1902 | case '7': |
1903 | case '8': |
1904 | case '9': |
1905 | if (len > 1) { |
1906 | char *end = name + len; |
1907 | while (--end > name) { |
1908 | if (!isDIGIT(*end)) |
1909 | return FALSE; |
1910 | } |
1911 | } |
1912 | yes: |
1913 | return TRUE; |
1914 | default: |
1915 | break; |
1916 | } |
1917 | return FALSE; |
1918 | } |