Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
4bb101f2 |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
9431620d |
4 | * 2000, 2001, 2002, 2003, 2004, 2005, 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)) |
48 | GvSV(gv) = NEWSV(72,0); |
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 | { |
76 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
77 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
5bd07a3d |
78 | if (!GvIOp(gv)) { |
7fb37951 |
79 | #ifdef GV_UNIQUE_CHECK |
80 | if (GvUNIQUE(gv)) { |
81 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); |
5bd07a3d |
82 | } |
83 | #endif |
a0d0e21e |
84 | GvIOp(gv) = newIO(); |
5bd07a3d |
85 | } |
a0d0e21e |
86 | return gv; |
87 | } |
88 | |
89 | GV * |
864dbfa3 |
90 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
91 | { |
eacec437 |
92 | char smallbuf[256]; |
53d95988 |
93 | char *tmpbuf; |
8ebc5c01 |
94 | STRLEN tmplen; |
79072805 |
95 | GV *gv; |
96 | |
1d7c1841 |
97 | if (!PL_defstash) |
98 | return Nullgv; |
99 | |
53d95988 |
100 | tmplen = strlen(name) + 2; |
101 | if (tmplen < sizeof smallbuf) |
102 | tmpbuf = smallbuf; |
103 | else |
a02a5408 |
104 | Newx(tmpbuf, tmplen + 1, char); |
0ac0412a |
105 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 |
106 | tmpbuf[0] = '_'; |
107 | tmpbuf[1] = '<'; |
490a0e98 |
108 | memcpy(tmpbuf + 2, name, tmplen - 1); |
3280af22 |
109 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
110 | if (!isGV(gv)) { |
3280af22 |
111 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 |
112 | #ifdef PERL_DONT_CREATE_GVSV |
113 | GvSV(gv) = newSVpvn(name, tmplen - 2); |
114 | #else |
115 | sv_setpvn(GvSV(gv), name, tmplen - 2); |
116 | #endif |
1d7c1841 |
117 | if (PERLDB_LINE) |
14befaf4 |
118 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile); |
1d7c1841 |
119 | } |
53d95988 |
120 | if (tmpbuf != smallbuf) |
121 | Safefree(tmpbuf); |
79072805 |
122 | return gv; |
123 | } |
124 | |
463ee0b2 |
125 | void |
864dbfa3 |
126 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
127 | { |
27da23d5 |
128 | dVAR; |
463ee0b2 |
129 | register GP *gp; |
e1ec3a88 |
130 | const bool doproto = SvTYPE(gv) > SVt_NULL; |
b15aece3 |
131 | const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL; |
463ee0b2 |
132 | |
dc437b57 |
133 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
134 | if (SvLEN(gv)) { |
135 | if (proto) { |
f880fe2f |
136 | SvPV_set(gv, NULL); |
b162af07 |
137 | SvLEN_set(gv, 0); |
55d729e4 |
138 | SvPOK_off(gv); |
139 | } else |
94010e71 |
140 | Safefree(SvPVX_mutable(gv)); |
55d729e4 |
141 | } |
a02a5408 |
142 | Newxz(gp, 1, GP); |
8990e307 |
143 | GvGP(gv) = gp_ref(gp); |
c69033f2 |
144 | #ifdef PERL_DONT_CREATE_GVSV |
145 | GvSV(gv) = 0; |
146 | #else |
463ee0b2 |
147 | GvSV(gv) = NEWSV(72,0); |
c69033f2 |
148 | #endif |
1d7c1841 |
149 | GvLINE(gv) = CopLINE(PL_curcop); |
07409e01 |
150 | /* XXX Ideally this cast would be replaced with a change to const char* |
151 | in the struct. */ |
152 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) ""; |
005a453c |
153 | GvCVGEN(gv) = 0; |
463ee0b2 |
154 | GvEGV(gv) = gv; |
14befaf4 |
155 | sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0); |
e15faf7d |
156 | GvSTASH(gv) = stash; |
157 | if (stash) |
158 | Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv); |
a0d0e21e |
159 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
160 | GvNAMELEN(gv) = len; |
23ad5bf5 |
161 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
162 | GvMULTI_on(gv); |
55d729e4 |
163 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
164 | SvIOK_off(gv); |
55d729e4 |
165 | ENTER; |
b099ddc0 |
166 | /* XXX unsafe for threads if eval_owner isn't held */ |
0b1558d1 |
167 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
3280af22 |
168 | GvCV(gv) = PL_compcv; |
55d729e4 |
169 | LEAVE; |
170 | |
3280af22 |
171 | PL_sub_generation++; |
65c50114 |
172 | CvGV(GvCV(gv)) = gv; |
e0d088d0 |
173 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 |
174 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
175 | if (proto) { |
176 | sv_setpv((SV*)GvCV(gv), proto); |
177 | Safefree(proto); |
178 | } |
179 | } |
463ee0b2 |
180 | } |
181 | |
76e3520e |
182 | STATIC void |
cea2e8a9 |
183 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
184 | { |
185 | switch (sv_type) { |
186 | case SVt_PVIO: |
187 | (void)GvIOn(gv); |
188 | break; |
189 | case SVt_PVAV: |
190 | (void)GvAVn(gv); |
191 | break; |
192 | case SVt_PVHV: |
193 | (void)GvHVn(gv); |
194 | break; |
c69033f2 |
195 | #ifdef PERL_DONT_CREATE_GVSV |
196 | case SVt_NULL: |
197 | case SVt_PVCV: |
198 | case SVt_PVFM: |
199 | break; |
200 | default: |
201 | (void)GvSVn(gv); |
202 | #endif |
a0d0e21e |
203 | } |
204 | } |
205 | |
954c1994 |
206 | /* |
207 | =for apidoc gv_fetchmeth |
208 | |
209 | Returns the glob with the given C<name> and a defined subroutine or |
210 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
211 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
212 | |
213 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
214 | side-effect creates a glob with the given C<name> in the given C<stash> |
215 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
216 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
217 | |
218 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
219 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
220 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
221 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
222 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
223 | |
224 | =cut |
225 | */ |
226 | |
79072805 |
227 | GV * |
864dbfa3 |
228 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
229 | { |
230 | AV* av; |
463ee0b2 |
231 | GV* topgv; |
79072805 |
232 | GV* gv; |
463ee0b2 |
233 | GV** gvp; |
748a9306 |
234 | CV* cv; |
bfcb3514 |
235 | const char *hvname; |
a0d0e21e |
236 | |
af09ea45 |
237 | /* UNIVERSAL methods should be callable without a stash */ |
238 | if (!stash) { |
239 | level = -1; /* probably appropriate */ |
240 | if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE))) |
241 | return 0; |
242 | } |
243 | |
bfcb3514 |
244 | hvname = HvNAME_get(stash); |
245 | if (!hvname) |
e27ad1f2 |
246 | Perl_croak(aTHX_ |
247 | "Can't use anonymous symbol table for method lookup"); |
248 | |
44a8e56a |
249 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
250 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
bfcb3514 |
251 | name, hvname); |
463ee0b2 |
252 | |
bfcb3514 |
253 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a |
254 | |
255 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
256 | if (!gvp) |
257 | topgv = Nullgv; |
258 | else { |
259 | topgv = *gvp; |
260 | if (SvTYPE(topgv) != SVt_PVGV) |
261 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
262 | if ((cv = GvCV(topgv))) { |
44a8e56a |
263 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
264 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
265 | return topgv; |
44a8e56a |
266 | /* Stale cached entry: junk it */ |
267 | SvREFCNT_dec(cv); |
268 | GvCV(topgv) = cv = Nullcv; |
269 | GvCVGEN(topgv) = 0; |
748a9306 |
270 | } |
3280af22 |
271 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
272 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
273 | } |
79072805 |
274 | |
9607fc9c |
275 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
276 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
277 | |
fb73857a |
278 | /* create and re-create @.*::SUPER::ISA on demand */ |
279 | if (!av || !SvMAGIC(av)) { |
7423f6db |
280 | STRLEN packlen = HvNAMELEN_get(stash); |
9607fc9c |
281 | |
bfcb3514 |
282 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { |
9607fc9c |
283 | HV* basestash; |
284 | |
285 | packlen -= 7; |
bfcb3514 |
286 | basestash = gv_stashpvn(hvname, packlen, TRUE); |
9607fc9c |
287 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
288 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
9607fc9c |
289 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
290 | if (!gvp || !(gv = *gvp)) |
bfcb3514 |
291 | Perl_croak(aTHX_ "Cannot create %s::ISA", hvname); |
9607fc9c |
292 | if (SvTYPE(gv) != SVt_PVGV) |
293 | gv_init(gv, stash, "ISA", 3, TRUE); |
294 | SvREFCNT_dec(GvAV(gv)); |
295 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
296 | } |
297 | } |
298 | } |
299 | |
300 | if (av) { |
79072805 |
301 | SV** svp = AvARRAY(av); |
93965878 |
302 | /* NOTE: No support for tied ISA */ |
303 | I32 items = AvFILLp(av) + 1; |
79072805 |
304 | while (items--) { |
823a54a3 |
305 | SV* const sv = *svp++; |
306 | HV* const basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
307 | if (!basestash) { |
599cee73 |
308 | if (ckWARN(WARN_MISC)) |
35c1215d |
309 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA", |
bfcb3514 |
310 | sv, hvname); |
79072805 |
311 | continue; |
312 | } |
44a8e56a |
313 | gv = gv_fetchmeth(basestash, name, len, |
314 | (level >= 0) ? level + 1 : level - 1); |
315 | if (gv) |
316 | goto gotcha; |
79072805 |
317 | } |
318 | } |
a0d0e21e |
319 | |
9607fc9c |
320 | /* if at top level, try UNIVERSAL */ |
321 | |
44a8e56a |
322 | if (level == 0 || level == -1) { |
823a54a3 |
323 | HV* const lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE); |
9607fc9c |
324 | |
823a54a3 |
325 | if (lastchance) { |
155aba94 |
326 | if ((gv = gv_fetchmeth(lastchance, name, len, |
327 | (level >= 0) ? level + 1 : level - 1))) |
328 | { |
44a8e56a |
329 | gotcha: |
dc848c6f |
330 | /* |
331 | * Cache method in topgv if: |
332 | * 1. topgv has no synonyms (else inheritance crosses wires) |
333 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
334 | */ |
335 | if (topgv && |
336 | GvREFCNT(topgv) == 1 && |
337 | (cv = GvCV(gv)) && |
338 | (CvROOT(cv) || CvXSUB(cv))) |
339 | { |
155aba94 |
340 | if ((cv = GvCV(topgv))) |
44a8e56a |
341 | SvREFCNT_dec(cv); |
342 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
343 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
344 | } |
a0d0e21e |
345 | return gv; |
346 | } |
005a453c |
347 | else if (topgv && GvREFCNT(topgv) == 1) { |
348 | /* cache the fact that the method is not defined */ |
3280af22 |
349 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
350 | } |
a0d0e21e |
351 | } |
352 | } |
353 | |
79072805 |
354 | return 0; |
355 | } |
356 | |
954c1994 |
357 | /* |
611c1e95 |
358 | =for apidoc gv_fetchmeth_autoload |
359 | |
360 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. |
361 | Returns a glob for the subroutine. |
362 | |
363 | For an autoloaded subroutine without a GV, will create a GV even |
364 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() |
365 | of the result may be zero. |
366 | |
367 | =cut |
368 | */ |
369 | |
370 | GV * |
371 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
372 | { |
373 | GV *gv = gv_fetchmeth(stash, name, len, level); |
374 | |
375 | if (!gv) { |
611c1e95 |
376 | CV *cv; |
377 | GV **gvp; |
378 | |
379 | if (!stash) |
380 | return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
5c7983e5 |
381 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
611c1e95 |
382 | return Nullgv; |
5c7983e5 |
383 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
611c1e95 |
384 | return Nullgv; |
385 | cv = GvCV(gv); |
386 | if (!(CvROOT(cv) || CvXSUB(cv))) |
387 | return Nullgv; |
388 | /* Have an autoload */ |
389 | if (level < 0) /* Cannot do without a stub */ |
390 | gv_fetchmeth(stash, name, len, 0); |
391 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
392 | if (!gvp) |
393 | return Nullgv; |
394 | return *gvp; |
395 | } |
396 | return gv; |
397 | } |
398 | |
399 | /* |
954c1994 |
400 | =for apidoc gv_fetchmethod_autoload |
401 | |
402 | Returns the glob which contains the subroutine to call to invoke the method |
403 | on the C<stash>. In fact in the presence of autoloading this may be the |
404 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
405 | already setup. |
954c1994 |
406 | |
407 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
408 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
409 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
410 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
411 | with a non-zero C<autoload> parameter. |
954c1994 |
412 | |
413 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
414 | that if you want to keep the returned glob for a long time, you need to |
415 | check for it being "AUTOLOAD", since at the later time the call may load a |
416 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
417 | created via a side effect to do this. |
954c1994 |
418 | |
419 | These functions have the same side-effects and as C<gv_fetchmeth> with |
420 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
421 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
422 | C<call_sv> apply equally to these functions. |
954c1994 |
423 | |
424 | =cut |
425 | */ |
426 | |
dc848c6f |
427 | GV * |
864dbfa3 |
428 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
429 | { |
08105a92 |
430 | register const char *nend; |
431 | const char *nsplit = 0; |
a0d0e21e |
432 | GV* gv; |
0dae17bd |
433 | HV* ostash = stash; |
434 | |
435 | if (stash && SvTYPE(stash) < SVt_PVHV) |
436 | stash = Nullhv; |
b267980d |
437 | |
463ee0b2 |
438 | for (nend = name; *nend; nend++) { |
9607fc9c |
439 | if (*nend == '\'') |
a0d0e21e |
440 | nsplit = nend; |
9607fc9c |
441 | else if (*nend == ':' && *(nend + 1) == ':') |
442 | nsplit = ++nend; |
a0d0e21e |
443 | } |
444 | if (nsplit) { |
9d4ba2ae |
445 | const char * const origname = name; |
a0d0e21e |
446 | name = nsplit + 1; |
a0d0e21e |
447 | if (*nsplit == ':') |
448 | --nsplit; |
9607fc9c |
449 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
450 | /* ->SUPER::method should really be looked up in original stash */ |
cea2e8a9 |
451 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
452 | CopSTASHPV(PL_curcop))); |
af09ea45 |
453 | /* __PACKAGE__::SUPER stash should be autovivified */ |
b15aece3 |
454 | stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
455 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 |
456 | origname, HvNAME_get(stash), name) ); |
4633a7c4 |
457 | } |
e189a56d |
458 | else { |
af09ea45 |
459 | /* don't autovifify if ->NoSuchStash::method */ |
460 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); |
e189a56d |
461 | |
462 | /* however, explicit calls to Pkg::SUPER::method may |
463 | happen, and may require autovivification to work */ |
464 | if (!stash && (nsplit - origname) >= 7 && |
465 | strnEQ(nsplit - 7, "::SUPER", 7) && |
466 | gv_stashpvn(origname, nsplit - origname - 7, FALSE)) |
467 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
468 | } |
0dae17bd |
469 | ostash = stash; |
4633a7c4 |
470 | } |
471 | |
9607fc9c |
472 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
473 | if (!gv) { |
2f6e0fe7 |
474 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
475 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
476 | else if (autoload) |
0dae17bd |
477 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 |
478 | } |
dc848c6f |
479 | else if (autoload) { |
9d4ba2ae |
480 | CV* const cv = GvCV(gv); |
09280a33 |
481 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
482 | GV* stubgv; |
483 | GV* autogv; |
484 | |
485 | if (CvANON(cv)) |
486 | stubgv = gv; |
487 | else { |
488 | stubgv = CvGV(cv); |
489 | if (GvCV(stubgv) != cv) /* orphaned import */ |
490 | stubgv = gv; |
491 | } |
492 | autogv = gv_autoload4(GvSTASH(stubgv), |
493 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
494 | if (autogv) |
495 | gv = autogv; |
496 | } |
497 | } |
44a8e56a |
498 | |
499 | return gv; |
500 | } |
501 | |
502 | GV* |
864dbfa3 |
503 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
504 | { |
27da23d5 |
505 | dVAR; |
44a8e56a |
506 | GV* gv; |
507 | CV* cv; |
508 | HV* varstash; |
509 | GV* vargv; |
510 | SV* varsv; |
e1ec3a88 |
511 | const char *packname = ""; |
7423f6db |
512 | STRLEN packname_len; |
44a8e56a |
513 | |
5c7983e5 |
514 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
44a8e56a |
515 | return Nullgv; |
0dae17bd |
516 | if (stash) { |
517 | if (SvTYPE(stash) < SVt_PVHV) { |
e62f0680 |
518 | packname = SvPV_const((SV*)stash, packname_len); |
0dae17bd |
519 | stash = Nullhv; |
520 | } |
521 | else { |
bfcb3514 |
522 | packname = HvNAME_get(stash); |
7423f6db |
523 | packname_len = HvNAMELEN_get(stash); |
0dae17bd |
524 | } |
525 | } |
5c7983e5 |
526 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
dc848c6f |
527 | return Nullgv; |
528 | cv = GvCV(gv); |
529 | |
adb5a9ae |
530 | if (!(CvROOT(cv) || CvXSUB(cv))) |
ed850460 |
531 | return Nullgv; |
532 | |
dc848c6f |
533 | /* |
534 | * Inheriting AUTOLOAD for non-methods works ... for now. |
535 | */ |
041457d9 |
536 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
537 | && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) |
538 | ) |
12bcd1a6 |
539 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f |
540 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd |
541 | packname, (int)len, name); |
44a8e56a |
542 | |
adb5a9ae |
543 | if (CvXSUB(cv)) { |
544 | /* rather than lookup/init $AUTOLOAD here |
545 | * only to have the XSUB do another lookup for $AUTOLOAD |
546 | * and split that value on the last '::', |
547 | * pass along the same data via some unused fields in the CV |
548 | */ |
549 | CvSTASH(cv) = stash; |
f880fe2f |
550 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 |
551 | SvCUR_set(cv, len); |
adb5a9ae |
552 | return gv; |
553 | } |
adb5a9ae |
554 | |
44a8e56a |
555 | /* |
556 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
557 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
558 | * use that, but for lack of anything better we will use the sub's |
559 | * original package to look up $AUTOLOAD. |
560 | */ |
561 | varstash = GvSTASH(CvGV(cv)); |
5c7983e5 |
562 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b |
563 | ENTER; |
564 | |
c69033f2 |
565 | if (!isGV(vargv)) { |
5c7983e5 |
566 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 |
567 | #ifdef PERL_DONT_CREATE_GVSV |
568 | GvSV(vargv) = NEWSV(72,0); |
569 | #endif |
570 | } |
3d35f11b |
571 | LEAVE; |
e203899d |
572 | varsv = GvSVn(vargv); |
7423f6db |
573 | sv_setpvn(varsv, packname, packname_len); |
44a8e56a |
574 | sv_catpvn(varsv, "::", 2); |
575 | sv_catpvn(varsv, name, len); |
576 | SvTAINTED_off(varsv); |
a0d0e21e |
577 | return gv; |
578 | } |
579 | |
d2c93421 |
580 | /* The "gv" parameter should be the glob known to Perl code as *! |
581 | * The scalar must already have been magicalized. |
582 | */ |
583 | STATIC void |
584 | S_require_errno(pTHX_ GV *gv) |
585 | { |
27da23d5 |
586 | dVAR; |
d2c93421 |
587 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
588 | |
a0288114 |
589 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
d2c93421 |
590 | dSP; |
591 | PUTBACK; |
592 | ENTER; |
593 | save_scalar(gv); /* keep the value of $! */ |
84f1fa11 |
594 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
595 | newSVpvn("Errno",5), Nullsv); |
d2c93421 |
596 | LEAVE; |
597 | SPAGAIN; |
598 | stash = gv_stashpvn("Errno",5,FALSE); |
599 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
600 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
601 | } |
602 | } |
603 | |
954c1994 |
604 | /* |
605 | =for apidoc gv_stashpv |
606 | |
386d01d6 |
607 | Returns a pointer to the stash for a specified package. C<name> should |
bc96cb06 |
608 | be a valid UTF-8 string and must be null-terminated. If C<create> is set |
609 | then the package will be created if it does not already exist. If C<create> |
610 | is not set and the package does not exist then NULL is returned. |
954c1994 |
611 | |
612 | =cut |
613 | */ |
614 | |
a0d0e21e |
615 | HV* |
864dbfa3 |
616 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
617 | { |
dc437b57 |
618 | return gv_stashpvn(name, strlen(name), create); |
619 | } |
620 | |
bc96cb06 |
621 | /* |
622 | =for apidoc gv_stashpvn |
623 | |
624 | Returns a pointer to the stash for a specified package. C<name> should |
625 | be a valid UTF-8 string. The C<namelen> parameter indicates the length of |
626 | the C<name>, in bytes. If C<create> is set then the package will be |
627 | created if it does not already exist. If C<create> is not set and the |
628 | package does not exist then NULL is returned. |
629 | |
630 | =cut |
631 | */ |
632 | |
dc437b57 |
633 | HV* |
864dbfa3 |
634 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
635 | { |
46fc3d4c |
636 | char smallbuf[256]; |
637 | char *tmpbuf; |
a0d0e21e |
638 | HV *stash; |
639 | GV *tmpgv; |
dc437b57 |
640 | |
46fc3d4c |
641 | if (namelen + 3 < sizeof smallbuf) |
642 | tmpbuf = smallbuf; |
643 | else |
a02a5408 |
644 | Newx(tmpbuf, namelen + 3, char); |
dc437b57 |
645 | Copy(name,tmpbuf,namelen,char); |
646 | tmpbuf[namelen++] = ':'; |
647 | tmpbuf[namelen++] = ':'; |
648 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
649 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
650 | if (tmpbuf != smallbuf) |
651 | Safefree(tmpbuf); |
a0d0e21e |
652 | if (!tmpgv) |
653 | return 0; |
654 | if (!GvHV(tmpgv)) |
655 | GvHV(tmpgv) = newHV(); |
656 | stash = GvHV(tmpgv); |
bfcb3514 |
657 | if (!HvNAME_get(stash)) |
51a37f80 |
658 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e |
659 | return stash; |
463ee0b2 |
660 | } |
661 | |
954c1994 |
662 | /* |
663 | =for apidoc gv_stashsv |
664 | |
386d01d6 |
665 | Returns a pointer to the stash for a specified package, which must be a |
666 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
667 | |
668 | =cut |
669 | */ |
670 | |
a0d0e21e |
671 | HV* |
864dbfa3 |
672 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
673 | { |
dc437b57 |
674 | STRLEN len; |
9d4ba2ae |
675 | const char * const ptr = SvPV_const(sv,len); |
dc437b57 |
676 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
677 | } |
678 | |
679 | |
463ee0b2 |
680 | GV * |
7a5fd60d |
681 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { |
b7787f18 |
682 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d |
683 | } |
684 | |
685 | GV * |
686 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) { |
687 | STRLEN len; |
9d4ba2ae |
688 | const char * const nambeg = SvPV_const(name, len); |
7a5fd60d |
689 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
690 | } |
691 | |
692 | GV * |
693 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, |
694 | I32 sv_type) |
79072805 |
695 | { |
08105a92 |
696 | register const char *name = nambeg; |
463ee0b2 |
697 | register GV *gv = 0; |
79072805 |
698 | GV**gvp; |
79072805 |
699 | I32 len; |
08105a92 |
700 | register const char *namend; |
463ee0b2 |
701 | HV *stash = 0; |
dd374669 |
702 | const I32 add = flags & ~SVf_UTF8; |
890ce7af |
703 | |
704 | PERL_UNUSED_ARG(full_len); |
79072805 |
705 | |
c07a80fd |
706 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
707 | name++; |
708 | |
79072805 |
709 | for (namend = name; *namend; namend++) { |
1d7c1841 |
710 | if ((*namend == ':' && namend[1] == ':') |
711 | || (*namend == '\'' && namend[1])) |
463ee0b2 |
712 | { |
463ee0b2 |
713 | if (!stash) |
3280af22 |
714 | stash = PL_defstash; |
dc437b57 |
715 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
716 | return Nullgv; |
463ee0b2 |
717 | |
85e6fe83 |
718 | len = namend - name; |
719 | if (len > 0) { |
3c78fafa |
720 | char smallbuf[256]; |
62b57502 |
721 | char *tmpbuf; |
62b57502 |
722 | |
25c09a70 |
723 | if (len + 3 < sizeof (smallbuf)) |
3c78fafa |
724 | tmpbuf = smallbuf; |
62b57502 |
725 | else |
a02a5408 |
726 | Newx(tmpbuf, len+3, char); |
a0d0e21e |
727 | Copy(name, tmpbuf, len, char); |
728 | tmpbuf[len++] = ':'; |
729 | tmpbuf[len++] = ':'; |
730 | tmpbuf[len] = '\0'; |
463ee0b2 |
731 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
732 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
733 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
734 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
735 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
736 | else |
737 | GvMULTI_on(gv); |
738 | } |
3c78fafa |
739 | if (tmpbuf != smallbuf) |
62b57502 |
740 | Safefree(tmpbuf); |
3280af22 |
741 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
742 | return Nullgv; |
85e6fe83 |
743 | |
463ee0b2 |
744 | if (!(stash = GvHV(gv))) |
745 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
746 | |
bfcb3514 |
747 | if (!HvNAME_get(stash)) |
51a37f80 |
748 | hv_name_set(stash, nambeg, namend - nambeg, 0); |
463ee0b2 |
749 | } |
750 | |
751 | if (*namend == ':') |
752 | namend++; |
753 | namend++; |
754 | name = namend; |
755 | if (!*name) |
3280af22 |
756 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
757 | } |
79072805 |
758 | } |
a0d0e21e |
759 | len = namend - name; |
463ee0b2 |
760 | |
761 | /* No stash in name, so see how we can default */ |
762 | |
763 | if (!stash) { |
7e2040f0 |
764 | if (isIDFIRST_lazy(name)) { |
9607fc9c |
765 | bool global = FALSE; |
766 | |
18ea00d7 |
767 | /* name is always \0 terminated, and initial \0 wouldn't return |
768 | true from isIDFIRST_lazy, so we know that name[1] is defined */ |
769 | switch (name[1]) { |
770 | case '\0': |
771 | if (*name == '_') |
9d116dd7 |
772 | global = TRUE; |
18ea00d7 |
773 | break; |
774 | case 'N': |
775 | if (strEQ(name, "INC") || strEQ(name, "ENV")) |
9d116dd7 |
776 | global = TRUE; |
18ea00d7 |
777 | break; |
778 | case 'I': |
779 | if (strEQ(name, "SIG")) |
9d116dd7 |
780 | global = TRUE; |
18ea00d7 |
781 | break; |
782 | case 'T': |
783 | if (strEQ(name, "STDIN") || strEQ(name, "STDOUT") || |
784 | strEQ(name, "STDERR")) |
463ee0b2 |
785 | global = TRUE; |
18ea00d7 |
786 | break; |
787 | case 'R': |
788 | if (strEQ(name, "ARGV") || strEQ(name, "ARGVOUT")) |
789 | global = TRUE; |
790 | break; |
463ee0b2 |
791 | } |
9607fc9c |
792 | |
463ee0b2 |
793 | if (global) |
3280af22 |
794 | stash = PL_defstash; |
923e4eb5 |
795 | else if (IN_PERL_COMPILETIME) { |
3280af22 |
796 | stash = PL_curstash; |
797 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
798 | sv_type != SVt_PVCV && |
799 | sv_type != SVt_PVGV && |
4633a7c4 |
800 | sv_type != SVt_PVFM && |
c07a80fd |
801 | sv_type != SVt_PVIO && |
70ec6265 |
802 | !(len == 1 && sv_type == SVt_PV && |
803 | (*name == 'a' || *name == 'b')) ) |
748a9306 |
804 | { |
4633a7c4 |
805 | gvp = (GV**)hv_fetch(stash,name,len,0); |
806 | if (!gvp || |
3280af22 |
807 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
808 | SvTYPE(*gvp) != SVt_PVGV) |
809 | { |
4633a7c4 |
810 | stash = 0; |
a5f75d66 |
811 | } |
155aba94 |
812 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
813 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
814 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
815 | { |
cea2e8a9 |
816 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
817 | sv_type == SVt_PVAV ? '@' : |
818 | sv_type == SVt_PVHV ? '%' : '$', |
819 | name); |
8ebc5c01 |
820 | if (GvCVu(*gvp)) |
cc507455 |
821 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
822 | stash = 0; |
4633a7c4 |
823 | } |
a0d0e21e |
824 | } |
85e6fe83 |
825 | } |
463ee0b2 |
826 | else |
1d7c1841 |
827 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
828 | } |
829 | else |
3280af22 |
830 | stash = PL_defstash; |
463ee0b2 |
831 | } |
832 | |
833 | /* By this point we should have a stash and a name */ |
834 | |
a0d0e21e |
835 | if (!stash) { |
5a844595 |
836 | if (add) { |
9d4ba2ae |
837 | SV * const err = Perl_mess(aTHX_ |
5a844595 |
838 | "Global symbol \"%s%s\" requires explicit package name", |
839 | (sv_type == SVt_PV ? "$" |
840 | : sv_type == SVt_PVAV ? "@" |
841 | : sv_type == SVt_PVHV ? "%" |
608b3986 |
842 | : ""), name); |
843 | if (USE_UTF8_IN_NAMES) |
844 | SvUTF8_on(err); |
845 | qerror(err); |
d7aacf4e |
846 | stash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV)); |
a0d0e21e |
847 | } |
d7aacf4e |
848 | else |
849 | return Nullgv; |
a0d0e21e |
850 | } |
851 | |
852 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
853 | return Nullgv; |
854 | |
79072805 |
855 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
856 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
857 | return Nullgv; |
858 | gv = *gvp; |
859 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
860 | if (add) { |
a5f75d66 |
861 | GvMULTI_on(gv); |
a0d0e21e |
862 | gv_init_sv(gv, sv_type); |
d2c93421 |
863 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
864 | require_errno(gv); |
a0d0e21e |
865 | } |
79072805 |
866 | return gv; |
55d729e4 |
867 | } else if (add & GV_NOINIT) { |
868 | return gv; |
79072805 |
869 | } |
93a17b20 |
870 | |
871 | /* Adding a new symbol */ |
872 | |
0453d815 |
873 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d |
874 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 |
875 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
876 | gv_init_sv(gv, sv_type); |
93a17b20 |
877 | |
a0288114 |
878 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d |
879 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
880 | GvMULTI_on(gv) ; |
881 | |
93a17b20 |
882 | /* set up magic where warranted */ |
cc4c2da6 |
883 | if (len > 1) { |
9431620d |
884 | #ifndef EBCDIC |
cc4c2da6 |
885 | if (*name > 'V' ) { |
886 | /* Nothing else to do. |
91f565cb |
887 | The compiler will probably turn the switch statement into a |
cc4c2da6 |
888 | branch table. Make sure we avoid even that small overhead for |
889 | the common case of lower case variable names. */ |
9431620d |
890 | } else |
891 | #endif |
892 | { |
b464bac0 |
893 | const char * const name2 = name + 1; |
cc4c2da6 |
894 | switch (*name) { |
895 | case 'A': |
896 | if (strEQ(name2, "RGV")) { |
897 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
898 | } |
899 | break; |
900 | case 'E': |
901 | if (strnEQ(name2, "XPORT", 5)) |
902 | GvMULTI_on(gv); |
903 | break; |
904 | case 'I': |
905 | if (strEQ(name2, "SA")) { |
9d4ba2ae |
906 | AV* const av = GvAVn(gv); |
cc4c2da6 |
907 | GvMULTI_on(gv); |
908 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0); |
909 | /* NOTE: No support for tied ISA */ |
910 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
911 | && AvFILLp(av) == -1) |
912 | { |
e1ec3a88 |
913 | const char *pname; |
cc4c2da6 |
914 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
915 | gv_stashpvn(pname, 9, TRUE); |
916 | av_push(av, newSVpvn(pname = "DB_File",7)); |
917 | gv_stashpvn(pname, 7, TRUE); |
918 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
919 | gv_stashpvn(pname, 9, TRUE); |
920 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
921 | gv_stashpvn(pname, 9, TRUE); |
922 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
923 | gv_stashpvn(pname, 9, TRUE); |
924 | } |
925 | } |
926 | break; |
927 | case 'O': |
928 | if (strEQ(name2, "VERLOAD")) { |
9d4ba2ae |
929 | HV* const hv = GvHVn(gv); |
cc4c2da6 |
930 | GvMULTI_on(gv); |
931 | hv_magic(hv, Nullgv, PERL_MAGIC_overload); |
932 | } |
933 | break; |
934 | case 'S': |
935 | if (strEQ(name2, "IG")) { |
936 | HV *hv; |
937 | I32 i; |
938 | if (!PL_psig_ptr) { |
a02a5408 |
939 | Newxz(PL_psig_ptr, SIG_SIZE, SV*); |
940 | Newxz(PL_psig_name, SIG_SIZE, SV*); |
941 | Newxz(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 |
942 | } |
943 | GvMULTI_on(gv); |
944 | hv = GvHVn(gv); |
945 | hv_magic(hv, Nullgv, PERL_MAGIC_sig); |
946 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 |
947 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 |
948 | if (init) |
949 | sv_setsv(*init, &PL_sv_undef); |
950 | PL_psig_ptr[i] = 0; |
951 | PL_psig_name[i] = 0; |
952 | PL_psig_pend[i] = 0; |
953 | } |
954 | } |
955 | break; |
956 | case 'V': |
957 | if (strEQ(name2, "ERSION")) |
958 | GvMULTI_on(gv); |
959 | break; |
e5218da5 |
960 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
961 | if (strEQ(name2, "HILD_ERROR_NATIVE")) |
962 | goto magicalize; |
963 | break; |
cc4c2da6 |
964 | case '\005': /* $^ENCODING */ |
965 | if (strEQ(name2, "NCODING")) |
966 | goto magicalize; |
967 | break; |
968 | case '\017': /* $^OPEN */ |
969 | if (strEQ(name2, "PEN")) |
970 | goto magicalize; |
971 | break; |
972 | case '\024': /* ${^TAINT} */ |
973 | if (strEQ(name2, "AINT")) |
974 | goto ro_magicalize; |
975 | break; |
7cebcbc0 |
976 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 |
977 | if (strEQ(name2, "NICODE")) |
cc4c2da6 |
978 | goto ro_magicalize; |
a0288114 |
979 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 |
980 | goto ro_magicalize; |
cc4c2da6 |
981 | break; |
982 | case '\027': /* $^WARNING_BITS */ |
983 | if (strEQ(name2, "ARNING_BITS")) |
984 | goto magicalize; |
985 | break; |
986 | case '1': |
987 | case '2': |
988 | case '3': |
989 | case '4': |
990 | case '5': |
991 | case '6': |
992 | case '7': |
993 | case '8': |
994 | case '9': |
85e6fe83 |
995 | { |
cc4c2da6 |
996 | /* ensures variable is only digits */ |
997 | /* ${"1foo"} fails this test (and is thus writeable) */ |
998 | /* added by japhy, but borrowed from is_gv_magical */ |
999 | const char *end = name + len; |
1000 | while (--end > name) { |
1001 | if (!isDIGIT(*end)) return gv; |
1002 | } |
1003 | goto ro_magicalize; |
1d7c1841 |
1004 | } |
dc437b57 |
1005 | } |
93a17b20 |
1006 | } |
392db708 |
1007 | } else { |
1008 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will |
1009 | be case '\0' in this switch statement (ie a default case) */ |
cc4c2da6 |
1010 | switch (*name) { |
1011 | case '&': |
1012 | case '`': |
1013 | case '\'': |
1014 | if ( |
1015 | sv_type == SVt_PVAV || |
1016 | sv_type == SVt_PVHV || |
1017 | sv_type == SVt_PVCV || |
1018 | sv_type == SVt_PVFM || |
1019 | sv_type == SVt_PVIO |
1020 | ) { break; } |
1021 | PL_sawampersand = TRUE; |
1022 | goto ro_magicalize; |
1023 | |
1024 | case ':': |
c69033f2 |
1025 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 |
1026 | goto magicalize; |
1027 | |
1028 | case '?': |
ff0cee69 |
1029 | #ifdef COMPLEX_STATUS |
c69033f2 |
1030 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 |
1031 | #endif |
cc4c2da6 |
1032 | goto magicalize; |
ff0cee69 |
1033 | |
cc4c2da6 |
1034 | case '!': |
d2c93421 |
1035 | |
cc4c2da6 |
1036 | /* If %! has been used, automatically load Errno.pm. |
1037 | The require will itself set errno, so in order to |
1038 | preserve its value we have to set up the magic |
1039 | now (rather than going to magicalize) |
1040 | */ |
d2c93421 |
1041 | |
c69033f2 |
1042 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
1043 | |
cc4c2da6 |
1044 | if (sv_type == SVt_PVHV) |
1045 | require_errno(gv); |
d2c93421 |
1046 | |
6cef1e77 |
1047 | break; |
cc4c2da6 |
1048 | case '-': |
1049 | { |
9d4ba2ae |
1050 | AV* const av = GvAVn(gv); |
14befaf4 |
1051 | sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
1052 | SvREADONLY_on(av); |
cc4c2da6 |
1053 | goto magicalize; |
1054 | } |
1055 | case '*': |
cc4c2da6 |
1056 | case '#': |
1057 | if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) |
1058 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
8ae1fe26 |
1059 | "$%c is no longer supported", *name); |
1060 | break; |
cc4c2da6 |
1061 | case '|': |
c69033f2 |
1062 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 |
1063 | goto magicalize; |
1064 | |
1065 | case '+': |
1066 | { |
9d4ba2ae |
1067 | AV* const av = GvAVn(gv); |
14befaf4 |
1068 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
1069 | SvREADONLY_on(av); |
cc4c2da6 |
1070 | /* FALL THROUGH */ |
e521374c |
1071 | } |
cc4c2da6 |
1072 | case '\023': /* $^S */ |
1073 | case '1': |
1074 | case '2': |
1075 | case '3': |
1076 | case '4': |
1077 | case '5': |
1078 | case '6': |
1079 | case '7': |
1080 | case '8': |
1081 | case '9': |
1082 | ro_magicalize: |
c69033f2 |
1083 | SvREADONLY_on(GvSVn(gv)); |
cc4c2da6 |
1084 | /* FALL THROUGH */ |
1085 | case '[': |
1086 | case '^': |
1087 | case '~': |
1088 | case '=': |
1089 | case '%': |
1090 | case '.': |
1091 | case '(': |
1092 | case ')': |
1093 | case '<': |
1094 | case '>': |
1095 | case ',': |
1096 | case '\\': |
1097 | case '/': |
1098 | case '\001': /* $^A */ |
1099 | case '\003': /* $^C */ |
1100 | case '\004': /* $^D */ |
1101 | case '\005': /* $^E */ |
1102 | case '\006': /* $^F */ |
1103 | case '\010': /* $^H */ |
1104 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1105 | case '\016': /* $^N */ |
1106 | case '\017': /* $^O */ |
1107 | case '\020': /* $^P */ |
1108 | case '\024': /* $^T */ |
1109 | case '\027': /* $^W */ |
1110 | magicalize: |
c69033f2 |
1111 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
cc4c2da6 |
1112 | break; |
e521374c |
1113 | |
cc4c2da6 |
1114 | case '\014': /* $^L */ |
c69033f2 |
1115 | sv_setpvn(GvSVn(gv),"\f",1); |
1116 | PL_formfeed = GvSVn(gv); |
463ee0b2 |
1117 | break; |
cc4c2da6 |
1118 | case ';': |
c69033f2 |
1119 | sv_setpvn(GvSVn(gv),"\034",1); |
463ee0b2 |
1120 | break; |
cc4c2da6 |
1121 | case ']': |
1122 | { |
c69033f2 |
1123 | SV * const sv = GvSVn(gv); |
d7aa5382 |
1124 | if (!sv_derived_from(PL_patchlevel, "version")) |
1125 | (void *)upg_version(PL_patchlevel); |
7d54d38e |
1126 | GvSV(gv) = vnumify(PL_patchlevel); |
1127 | SvREADONLY_on(GvSV(gv)); |
1128 | SvREFCNT_dec(sv); |
93a17b20 |
1129 | } |
1130 | break; |
cc4c2da6 |
1131 | case '\026': /* $^V */ |
1132 | { |
c69033f2 |
1133 | SV * const sv = GvSVn(gv); |
f9be5ac8 |
1134 | GvSV(gv) = new_version(PL_patchlevel); |
1135 | SvREADONLY_on(GvSV(gv)); |
1136 | SvREFCNT_dec(sv); |
16070b82 |
1137 | } |
1138 | break; |
cc4c2da6 |
1139 | } |
79072805 |
1140 | } |
93a17b20 |
1141 | return gv; |
79072805 |
1142 | } |
1143 | |
1144 | void |
35a4481c |
1145 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1146 | { |
35a4481c |
1147 | const char *name; |
7423f6db |
1148 | STRLEN namelen; |
35a4481c |
1149 | const HV * const hv = GvSTASH(gv); |
43693395 |
1150 | if (!hv) { |
0c34ef67 |
1151 | SvOK_off(sv); |
43693395 |
1152 | return; |
1153 | } |
1154 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 |
1155 | |
bfcb3514 |
1156 | name = HvNAME_get(hv); |
7423f6db |
1157 | if (name) { |
1158 | namelen = HvNAMELEN_get(hv); |
1159 | } else { |
e27ad1f2 |
1160 | name = "__ANON__"; |
7423f6db |
1161 | namelen = 8; |
1162 | } |
a0288114 |
1163 | |
e27ad1f2 |
1164 | if (keepmain || strNE(name, "main")) { |
7423f6db |
1165 | sv_catpvn(sv,name,namelen); |
6a7a3232 |
1166 | sv_catpvn(sv,"::", 2); |
43693395 |
1167 | } |
257984c0 |
1168 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 |
1169 | } |
1170 | |
1171 | void |
35a4481c |
1172 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1173 | { |
46c461b5 |
1174 | const GV * const egv = GvEGV(gv); |
1175 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 |
1176 | } |
1177 | |
79072805 |
1178 | IO * |
864dbfa3 |
1179 | Perl_newIO(pTHX) |
79072805 |
1180 | { |
8990e307 |
1181 | GV *iogv; |
b7787f18 |
1182 | IO * const io = (IO*)NEWSV(0,0); |
8990e307 |
1183 | |
a0d0e21e |
1184 | sv_upgrade((SV *)io,SVt_PVIO); |
158623e7 |
1185 | /* This used to read SvREFCNT(io) = 1; |
1186 | It's not clear why the reference count needed an explicit reset. NWC |
1187 | */ |
1188 | assert (SvREFCNT(io) == 1); |
8990e307 |
1189 | SvOBJECT_on(io); |
b464bac0 |
1190 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 |
1191 | hv_clear(PL_stashcache); |
c9de509e |
1192 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d |
1193 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1194 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
c9de509e |
1195 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
b162af07 |
1196 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 |
1197 | return io; |
1198 | } |
1199 | |
1200 | void |
864dbfa3 |
1201 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1202 | { |
79072805 |
1203 | register I32 i; |
463ee0b2 |
1204 | |
8990e307 |
1205 | if (!HvARRAY(stash)) |
1206 | return; |
a0d0e21e |
1207 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 |
1208 | const HE *entry; |
dc437b57 |
1209 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 |
1210 | register GV *gv; |
1211 | HV *hv; |
dc437b57 |
1212 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f |
1213 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e |
1214 | { |
19b6c847 |
1215 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1216 | gv_check(hv); /* nested package */ |
1217 | } |
dc437b57 |
1218 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 |
1219 | const char *file; |
dc437b57 |
1220 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1221 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1222 | continue; |
1d7c1841 |
1223 | file = GvFILE(gv); |
1224 | /* performance hack: if filename is absolute and it's a standard |
1225 | * module, don't bother warning */ |
6eb630b7 |
1226 | #ifdef MACOS_TRADITIONAL |
551405c4 |
1227 | # define LIB_COMPONENT ":lib:" |
6eb630b7 |
1228 | #else |
551405c4 |
1229 | # define LIB_COMPONENT "/lib/" |
6eb630b7 |
1230 | #endif |
551405c4 |
1231 | if (file |
1232 | && PERL_FILE_IS_ABSOLUTE(file) |
1233 | && (instr(file, LIB_COMPONENT) || instr(file, ".pm"))) |
1d7c1841 |
1234 | { |
8990e307 |
1235 | continue; |
1d7c1841 |
1236 | } |
1237 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1238 | #ifdef USE_ITHREADS |
dd374669 |
1239 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 |
1240 | #else |
1241 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1242 | #endif |
9014280d |
1243 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 |
1244 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 |
1245 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 |
1246 | } |
79072805 |
1247 | } |
1248 | } |
1249 | } |
1250 | |
1251 | GV * |
e1ec3a88 |
1252 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 |
1253 | { |
cea2e8a9 |
1254 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1255 | TRUE, SVt_PVGV); |
79072805 |
1256 | } |
1257 | |
1258 | /* hopefully this is only called on local symbol table entries */ |
1259 | |
1260 | GP* |
864dbfa3 |
1261 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1262 | { |
1d7c1841 |
1263 | if (!gp) |
1264 | return (GP*)NULL; |
79072805 |
1265 | gp->gp_refcnt++; |
44a8e56a |
1266 | if (gp->gp_cv) { |
1267 | if (gp->gp_cvgen) { |
1268 | /* multi-named GPs cannot be used for method cache */ |
1269 | SvREFCNT_dec(gp->gp_cv); |
1270 | gp->gp_cv = Nullcv; |
1271 | gp->gp_cvgen = 0; |
1272 | } |
1273 | else { |
1274 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1275 | PL_sub_generation++; |
44a8e56a |
1276 | } |
1277 | } |
79072805 |
1278 | return gp; |
79072805 |
1279 | } |
1280 | |
1281 | void |
864dbfa3 |
1282 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1283 | { |
79072805 |
1284 | GP* gp; |
1285 | |
1286 | if (!gv || !(gp = GvGP(gv))) |
1287 | return; |
f248d071 |
1288 | if (gp->gp_refcnt == 0) { |
1289 | if (ckWARN_d(WARN_INTERNAL)) |
9014280d |
1290 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc |
1291 | "Attempt to free unreferenced glob pointers" |
1292 | pTHX__FORMAT pTHX__VALUE); |
79072805 |
1293 | return; |
1294 | } |
44a8e56a |
1295 | if (gp->gp_cv) { |
1296 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1297 | PL_sub_generation++; |
44a8e56a |
1298 | } |
748a9306 |
1299 | if (--gp->gp_refcnt > 0) { |
1300 | if (gp->gp_egv == gv) |
1301 | gp->gp_egv = 0; |
79072805 |
1302 | return; |
748a9306 |
1303 | } |
79072805 |
1304 | |
13207a71 |
1305 | if (gp->gp_sv) SvREFCNT_dec(gp->gp_sv); |
8926f269 |
1306 | if (gp->gp_av) SvREFCNT_dec(gp->gp_av); |
bfcb3514 |
1307 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1308 | Somehow gp->gp_hv can end up pointing at freed garbage. */ |
1309 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { |
bfcb3514 |
1310 | const char *hvname = HvNAME_get(gp->gp_hv); |
1311 | if (PL_stashcache && hvname) |
7423f6db |
1312 | hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
1313 | G_DISCARD); |
bfcb3514 |
1314 | SvREFCNT_dec(gp->gp_hv); |
13207a71 |
1315 | } |
1316 | if (gp->gp_io) SvREFCNT_dec(gp->gp_io); |
1317 | if (gp->gp_cv) SvREFCNT_dec(gp->gp_cv); |
1318 | if (gp->gp_form) SvREFCNT_dec(gp->gp_form); |
748a9306 |
1319 | |
79072805 |
1320 | Safefree(gp); |
1321 | GvGP(gv) = 0; |
1322 | } |
1323 | |
d460ef45 |
1324 | int |
1325 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1326 | { |
53c1dcc0 |
1327 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1328 | PERL_UNUSED_ARG(sv); |
dd374669 |
1329 | |
d460ef45 |
1330 | if (amtp && AMT_AMAGIC(amtp)) { |
1331 | int i; |
1332 | for (i = 1; i < NofAMmeth; i++) { |
53c1dcc0 |
1333 | CV * const cv = amtp->table[i]; |
d460ef45 |
1334 | if (cv != Nullcv) { |
1335 | SvREFCNT_dec((SV *) cv); |
1336 | amtp->table[i] = Nullcv; |
1337 | } |
1338 | } |
1339 | } |
1340 | return 0; |
1341 | } |
1342 | |
a0d0e21e |
1343 | /* Updates and caches the CV's */ |
1344 | |
1345 | bool |
864dbfa3 |
1346 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1347 | { |
53c1dcc0 |
1348 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
1349 | AMT * const amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1350 | AMT amt; |
a0d0e21e |
1351 | |
3280af22 |
1352 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1353 | && amtp->was_ok_sub == PL_sub_generation) |
eb160463 |
1354 | return (bool)AMT_OVERLOADED(amtp); |
14befaf4 |
1355 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e |
1356 | |
bfcb3514 |
1357 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e |
1358 | |
d460ef45 |
1359 | Zero(&amt,1,AMT); |
3280af22 |
1360 | amt.was_ok_am = PL_amagic_generation; |
1361 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1362 | amt.fallback = AMGfallNO; |
1363 | amt.flags = 0; |
1364 | |
a6006777 |
1365 | { |
32251b26 |
1366 | int filled = 0, have_ovl = 0; |
1367 | int i, lim = 1; |
a6006777 |
1368 | |
22c35a8c |
1369 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1370 | |
89ffc314 |
1371 | /* Try to find via inheritance. */ |
53c1dcc0 |
1372 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1373 | SV * const sv = gv ? GvSV(gv) : NULL; |
1374 | CV* cv; |
89ffc314 |
1375 | |
1376 | if (!gv) |
32251b26 |
1377 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 |
1378 | #ifdef PERL_DONT_CREATE_GVSV |
1379 | else if (!sv) { |
1380 | /* Equivalent to !SvTRUE and !SvOK */ |
1381 | } |
1382 | #endif |
89ffc314 |
1383 | else if (SvTRUE(sv)) |
1384 | amt.fallback=AMGfallYES; |
1385 | else if (SvOK(sv)) |
1386 | amt.fallback=AMGfallNEVER; |
a6006777 |
1387 | |
32251b26 |
1388 | for (i = 1; i < lim; i++) |
1389 | amt.table[i] = Nullcv; |
1390 | for (; i < NofAMmeth; i++) { |
e1ec3a88 |
1391 | const char *cooky = PL_AMG_names[i]; |
32251b26 |
1392 | /* Human-readable form, for debugging: */ |
e1ec3a88 |
1393 | const char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
1394 | const STRLEN l = strlen(cooky); |
89ffc314 |
1395 | |
a0288114 |
1396 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1397 | cp, HvNAME_get(stash)) ); |
611c1e95 |
1398 | /* don't fill the cache while looking up! |
1399 | Creation of inheritance stubs in intermediate packages may |
1400 | conflict with the logic of runtime method substitution. |
1401 | Indeed, for inheritance A -> B -> C, if C overloads "+0", |
1402 | then we could have created stubs for "(+0" in A and C too. |
1403 | But if B overloads "bool", we may want to use it for |
1404 | numifying instead of C's "+0". */ |
1405 | if (i >= DESTROY_amg) |
1406 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); |
1407 | else /* Autoload taken care of below */ |
1408 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); |
46fc3d4c |
1409 | cv = 0; |
89ffc314 |
1410 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 |
1411 | const char *hvname; |
44a8e56a |
1412 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 |
1413 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 |
1414 | /* This is a hack to support autoloading..., while |
1415 | knowing *which* methods were declared as overloaded. */ |
44a8e56a |
1416 | /* GvSV contains the name of the method. */ |
4ea42e7f |
1417 | GV *ngv = Nullgv; |
c69033f2 |
1418 | SV *gvsv = GvSV(gv); |
a0288114 |
1419 | |
1420 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ |
1421 | "\" for overloaded \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1422 | GvSV(gv), cp, hvname) ); |
c69033f2 |
1423 | if (!gvsv || !SvPOK(gvsv) |
1424 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), |
dc848c6f |
1425 | FALSE))) |
1426 | { |
a0288114 |
1427 | /* Can be an import stub (created by "can"). */ |
c69033f2 |
1428 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
a0288114 |
1429 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1430 | "in package \"%.256s\"", |
35c1215d |
1431 | (GvCVGEN(gv) ? "Stub found while resolving" |
1432 | : "Can't resolve"), |
bfcb3514 |
1433 | name, cp, hvname); |
44a8e56a |
1434 | } |
dc848c6f |
1435 | cv = GvCV(gv = ngv); |
44a8e56a |
1436 | } |
b464bac0 |
1437 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 |
1438 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a |
1439 | GvNAME(CvGV(cv))) ); |
1440 | filled = 1; |
32251b26 |
1441 | if (i < DESTROY_amg) |
1442 | have_ovl = 1; |
611c1e95 |
1443 | } else if (gv) { /* Autoloaded... */ |
1444 | cv = (CV*)gv; |
1445 | filled = 1; |
44a8e56a |
1446 | } |
a6006777 |
1447 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1448 | } |
a0d0e21e |
1449 | if (filled) { |
a6006777 |
1450 | AMT_AMAGIC_on(&amt); |
32251b26 |
1451 | if (have_ovl) |
1452 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1453 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1454 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1455 | return have_ovl; |
a0d0e21e |
1456 | } |
1457 | } |
a6006777 |
1458 | /* Here we have no table: */ |
9cbac4c7 |
1459 | /* no_table: */ |
a6006777 |
1460 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1461 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1462 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1463 | return FALSE; |
1464 | } |
1465 | |
32251b26 |
1466 | |
1467 | CV* |
1468 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1469 | { |
3f8f4626 |
1470 | MAGIC *mg; |
32251b26 |
1471 | AMT *amtp; |
1472 | |
bfcb3514 |
1473 | if (!stash || !HvNAME_get(stash)) |
3f8f4626 |
1474 | return Nullcv; |
14befaf4 |
1475 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1476 | if (!mg) { |
1477 | do_update: |
1478 | Gv_AMupdate(stash); |
14befaf4 |
1479 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1480 | } |
1481 | amtp = (AMT*)mg->mg_ptr; |
1482 | if ( amtp->was_ok_am != PL_amagic_generation |
1483 | || amtp->was_ok_sub != PL_sub_generation ) |
1484 | goto do_update; |
3ad83ce7 |
1485 | if (AMT_AMAGIC(amtp)) { |
b7787f18 |
1486 | CV * const ret = amtp->table[id]; |
3ad83ce7 |
1487 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1488 | /* Passing it through may have resulted in a warning |
1489 | "Inherited AUTOLOAD for a non-method deprecated", since |
1490 | our caller is going through a function call, not a method call. |
1491 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ |
890ce7af |
1492 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 |
1493 | |
1494 | if (gv && GvCV(gv)) |
1495 | return GvCV(gv); |
1496 | } |
1497 | return ret; |
1498 | } |
a0288114 |
1499 | |
32251b26 |
1500 | return Nullcv; |
1501 | } |
1502 | |
1503 | |
a0d0e21e |
1504 | SV* |
864dbfa3 |
1505 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1506 | { |
27da23d5 |
1507 | dVAR; |
b267980d |
1508 | MAGIC *mg; |
9c5ffd7c |
1509 | CV *cv=NULL; |
a0d0e21e |
1510 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1511 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 |
1512 | int off = 0, off1, lr = 0, notfound = 0; |
1513 | int postpr = 0, force_cpy = 0; |
1514 | int assign = AMGf_assign & flags; |
1515 | const int assignshift = assign ? 1 : 0; |
497b47a8 |
1516 | #ifdef DEBUGGING |
1517 | int fl=0; |
497b47a8 |
1518 | #endif |
25716404 |
1519 | HV* stash=NULL; |
a0d0e21e |
1520 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 |
1521 | && (stash = SvSTASH(SvRV(left))) |
1522 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1523 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1524 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1525 | : (CV **) NULL)) |
b267980d |
1526 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1527 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1528 | * usual method */ |
497b47a8 |
1529 | ( |
1530 | #ifdef DEBUGGING |
1531 | fl = 1, |
a0288114 |
1532 | #endif |
497b47a8 |
1533 | cv = cvp[off=method])))) { |
a0d0e21e |
1534 | lr = -1; /* Call method for left argument */ |
1535 | } else { |
1536 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1537 | int logic; |
1538 | |
1539 | /* look for substituted methods */ |
ee239bfe |
1540 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1541 | switch (method) { |
1542 | case inc_amg: |
ee239bfe |
1543 | force_cpy = 1; |
1544 | if ((cv = cvp[off=add_ass_amg]) |
1545 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1546 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1547 | } |
1548 | break; |
1549 | case dec_amg: |
ee239bfe |
1550 | force_cpy = 1; |
1551 | if ((cv = cvp[off = subtr_ass_amg]) |
1552 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1553 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1554 | } |
1555 | break; |
1556 | case bool__amg: |
1557 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1558 | break; |
1559 | case numer_amg: |
1560 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1561 | break; |
1562 | case string_amg: |
1563 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1564 | break; |
b7787f18 |
1565 | case not_amg: |
1566 | (void)((cv = cvp[off=bool__amg]) |
1567 | || (cv = cvp[off=numer_amg]) |
1568 | || (cv = cvp[off=string_amg])); |
1569 | postpr = 1; |
1570 | break; |
748a9306 |
1571 | case copy_amg: |
1572 | { |
76e3520e |
1573 | /* |
1574 | * SV* ref causes confusion with the interpreter variable of |
1575 | * the same name |
1576 | */ |
890ce7af |
1577 | SV* const tmpRef=SvRV(left); |
76e3520e |
1578 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1579 | /* |
1580 | * Just to be extra cautious. Maybe in some |
1581 | * additional cases sv_setsv is safe, too. |
1582 | */ |
890ce7af |
1583 | SV* const newref = newSVsv(tmpRef); |
748a9306 |
1584 | SvOBJECT_on(newref); |
b162af07 |
1585 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 |
1586 | return newref; |
1587 | } |
1588 | } |
1589 | break; |
a0d0e21e |
1590 | case abs_amg: |
b267980d |
1591 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1592 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af |
1593 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1594 | if (off1==lt_amg) { |
890ce7af |
1595 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1596 | lt_amg,AMGf_noright); |
1597 | logic = SvTRUE(lessp); |
1598 | } else { |
890ce7af |
1599 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1600 | ncmp_amg,AMGf_noright); |
1601 | logic = (SvNV(lessp) < 0); |
1602 | } |
1603 | if (logic) { |
1604 | if (off==subtr_amg) { |
1605 | right = left; |
748a9306 |
1606 | left = nullsv; |
a0d0e21e |
1607 | lr = 1; |
1608 | } |
1609 | } else { |
1610 | return left; |
1611 | } |
1612 | } |
1613 | break; |
1614 | case neg_amg: |
155aba94 |
1615 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1616 | right = left; |
1617 | left = sv_2mortal(newSViv(0)); |
1618 | lr = 1; |
1619 | } |
1620 | break; |
f216259d |
1621 | case int_amg: |
f5284f61 |
1622 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1623 | /* FAIL safe */ |
1624 | return NULL; /* Delegate operation to standard mechanisms. */ |
1625 | break; |
f5284f61 |
1626 | case to_sv_amg: |
1627 | case to_av_amg: |
1628 | case to_hv_amg: |
1629 | case to_gv_amg: |
1630 | case to_cv_amg: |
1631 | /* FAIL safe */ |
b267980d |
1632 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1633 | break; |
a0d0e21e |
1634 | default: |
1635 | goto not_found; |
1636 | } |
1637 | if (!cv) goto not_found; |
1638 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
25716404 |
1639 | && (stash = SvSTASH(SvRV(right))) |
1640 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1641 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1642 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1643 | : (CV **) NULL)) |
a0d0e21e |
1644 | && (cv = cvp[off=method])) { /* Method for right |
1645 | * argument found */ |
1646 | lr=1; |
b267980d |
1647 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1648 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1649 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1650 | && !(flags & AMGf_unary)) { |
1651 | /* We look for substitution for |
1652 | * comparison operations and |
fc36a67e |
1653 | * concatenation */ |
a0d0e21e |
1654 | if (method==concat_amg || method==concat_ass_amg |
1655 | || method==repeat_amg || method==repeat_ass_amg) { |
1656 | return NULL; /* Delegate operation to string conversion */ |
1657 | } |
1658 | off = -1; |
1659 | switch (method) { |
1660 | case lt_amg: |
1661 | case le_amg: |
1662 | case gt_amg: |
1663 | case ge_amg: |
1664 | case eq_amg: |
1665 | case ne_amg: |
1666 | postpr = 1; off=ncmp_amg; break; |
1667 | case slt_amg: |
1668 | case sle_amg: |
1669 | case sgt_amg: |
1670 | case sge_amg: |
1671 | case seq_amg: |
1672 | case sne_amg: |
1673 | postpr = 1; off=scmp_amg; break; |
1674 | } |
1675 | if (off != -1) cv = cvp[off]; |
1676 | if (!cv) { |
1677 | goto not_found; |
1678 | } |
1679 | } else { |
a6006777 |
1680 | not_found: /* No method found, either report or croak */ |
b267980d |
1681 | switch (method) { |
1682 | case to_sv_amg: |
1683 | case to_av_amg: |
1684 | case to_hv_amg: |
1685 | case to_gv_amg: |
1686 | case to_cv_amg: |
1687 | /* FAIL safe */ |
1688 | return left; /* Delegate operation to standard mechanisms. */ |
1689 | break; |
1690 | } |
a0d0e21e |
1691 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1692 | notfound = 1; lr = -1; |
1693 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1694 | notfound = 1; lr = 1; |
1695 | } else { |
46fc3d4c |
1696 | SV *msg; |
774d564b |
1697 | if (off==-1) off=method; |
b267980d |
1698 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 |
1699 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 |
1700 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1701 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1702 | SvAMAGIC(left)? |
a0d0e21e |
1703 | "in overloaded package ": |
1704 | "has no overloaded magic", |
b267980d |
1705 | SvAMAGIC(left)? |
bfcb3514 |
1706 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e |
1707 | "", |
b267980d |
1708 | SvAMAGIC(right)? |
e7ea3e70 |
1709 | ",\n\tright argument in overloaded package ": |
b267980d |
1710 | (flags & AMGf_unary |
e7ea3e70 |
1711 | ? "" |
1712 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1713 | SvAMAGIC(right)? |
bfcb3514 |
1714 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c |
1715 | "")); |
a0d0e21e |
1716 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 |
1717 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e |
1718 | } else { |
894356b3 |
1719 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1720 | } |
1721 | return NULL; |
1722 | } |
ee239bfe |
1723 | force_cpy = force_cpy || assign; |
a0d0e21e |
1724 | } |
1725 | } |
497b47a8 |
1726 | #ifdef DEBUGGING |
a0d0e21e |
1727 | if (!notfound) { |
497b47a8 |
1728 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 |
1729 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 |
1730 | AMG_id2name(off), |
1731 | method+assignshift==off? "" : |
a0288114 |
1732 | " (initially \"", |
497b47a8 |
1733 | method+assignshift==off? "" : |
1734 | AMG_id2name(method+assignshift), |
a0288114 |
1735 | method+assignshift==off? "" : "\")", |
497b47a8 |
1736 | flags & AMGf_unary? "" : |
1737 | lr==1 ? " for right argument": " for left argument", |
1738 | flags & AMGf_unary? " for argument" : "", |
bfcb3514 |
1739 | stash ? HvNAME_get(stash) : "null", |
497b47a8 |
1740 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1741 | } |
497b47a8 |
1742 | #endif |
748a9306 |
1743 | /* Since we use shallow copy during assignment, we need |
1744 | * to dublicate the contents, probably calling user-supplied |
1745 | * version of copy operator |
1746 | */ |
ee239bfe |
1747 | /* We need to copy in following cases: |
1748 | * a) Assignment form was called. |
1749 | * assignshift==1, assign==T, method + 1 == off |
1750 | * b) Increment or decrement, called directly. |
1751 | * assignshift==0, assign==0, method + 0 == off |
1752 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1753 | * assignshift==0, assign==T, |
ee239bfe |
1754 | * force_cpy == T |
1755 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1756 | * assignshift==0, assign==0, |
ee239bfe |
1757 | * force_cpy == T |
1758 | * e) Assignment form translated to nomethod. |
1759 | * assignshift==1, assign==T, method + 1 != off |
1760 | * force_cpy == T |
1761 | */ |
1762 | /* off is method, method+assignshift, or a result of opcode substitution. |
1763 | * In the latter case assignshift==0, so only notfound case is important. |
1764 | */ |
1765 | if (( (method + assignshift == off) |
1766 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1767 | || force_cpy) |
1768 | RvDEEPCP(left); |
a0d0e21e |
1769 | { |
1770 | dSP; |
1771 | BINOP myop; |
1772 | SV* res; |
b7787f18 |
1773 | const bool oldcatch = CATCH_GET; |
a0d0e21e |
1774 | |
54310121 |
1775 | CATCH_SET(TRUE); |
a0d0e21e |
1776 | Zero(&myop, 1, BINOP); |
1777 | myop.op_last = (OP *) &myop; |
1778 | myop.op_next = Nullop; |
54310121 |
1779 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1780 | |
e788e7d3 |
1781 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1782 | ENTER; |
462e5cf6 |
1783 | SAVEOP(); |
533c011a |
1784 | PL_op = (OP *) &myop; |
3280af22 |
1785 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1786 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1787 | PUTBACK; |
cea2e8a9 |
1788 | pp_pushmark(); |
a0d0e21e |
1789 | |
924508f0 |
1790 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1791 | PUSHs(lr>0? right: left); |
1792 | PUSHs(lr>0? left: right); |
3280af22 |
1793 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1794 | if (notfound) { |
89ffc314 |
1795 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1796 | } |
1797 | PUSHs((SV*)cv); |
1798 | PUTBACK; |
1799 | |
155aba94 |
1800 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1801 | CALLRUNOPS(aTHX); |
a0d0e21e |
1802 | LEAVE; |
1803 | SPAGAIN; |
1804 | |
1805 | res=POPs; |
ebafeae7 |
1806 | PUTBACK; |
d3acc0f7 |
1807 | POPSTACK; |
54310121 |
1808 | CATCH_SET(oldcatch); |
a0d0e21e |
1809 | |
a0d0e21e |
1810 | if (postpr) { |
b7787f18 |
1811 | int ans; |
a0d0e21e |
1812 | switch (method) { |
1813 | case le_amg: |
1814 | case sle_amg: |
1815 | ans=SvIV(res)<=0; break; |
1816 | case lt_amg: |
1817 | case slt_amg: |
1818 | ans=SvIV(res)<0; break; |
1819 | case ge_amg: |
1820 | case sge_amg: |
1821 | ans=SvIV(res)>=0; break; |
1822 | case gt_amg: |
1823 | case sgt_amg: |
1824 | ans=SvIV(res)>0; break; |
1825 | case eq_amg: |
1826 | case seq_amg: |
1827 | ans=SvIV(res)==0; break; |
1828 | case ne_amg: |
1829 | case sne_amg: |
1830 | ans=SvIV(res)!=0; break; |
1831 | case inc_amg: |
1832 | case dec_amg: |
bbce6d69 |
1833 | SvSetSV(left,res); return left; |
dc437b57 |
1834 | case not_amg: |
fe7ac86a |
1835 | ans=!SvTRUE(res); break; |
b7787f18 |
1836 | default: |
1837 | ans=0; break; |
a0d0e21e |
1838 | } |
54310121 |
1839 | return boolSV(ans); |
748a9306 |
1840 | } else if (method==copy_amg) { |
1841 | if (!SvROK(res)) { |
cea2e8a9 |
1842 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1843 | } |
1844 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1845 | } else { |
1846 | return res; |
1847 | } |
1848 | } |
1849 | } |
c9d5ac95 |
1850 | |
1851 | /* |
7fc63493 |
1852 | =for apidoc is_gv_magical_sv |
c9d5ac95 |
1853 | |
7a5fd60d |
1854 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
1855 | |
1856 | =cut |
1857 | */ |
1858 | |
1859 | bool |
1860 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) |
1861 | { |
1862 | STRLEN len; |
b64e5050 |
1863 | const char * const temp = SvPV_const(name, len); |
7a5fd60d |
1864 | return is_gv_magical(temp, len, flags); |
1865 | } |
1866 | |
1867 | /* |
1868 | =for apidoc is_gv_magical |
1869 | |
c9d5ac95 |
1870 | Returns C<TRUE> if given the name of a magical GV. |
1871 | |
1872 | Currently only useful internally when determining if a GV should be |
1873 | created even in rvalue contexts. |
1874 | |
1875 | C<flags> is not used at present but available for future extension to |
1876 | allow selecting particular classes of magical variable. |
1877 | |
b9b0e72c |
1878 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
1879 | This assumption is met by all callers within the perl core, which all pass |
1880 | pointers returned by SvPV. |
1881 | |
c9d5ac95 |
1882 | =cut |
1883 | */ |
1884 | bool |
7fc63493 |
1885 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 |
1886 | { |
9d4ba2ae |
1887 | PERL_UNUSED_ARG(flags); |
1888 | |
b9b0e72c |
1889 | if (len > 1) { |
b464bac0 |
1890 | const char * const name1 = name + 1; |
b9b0e72c |
1891 | switch (*name) { |
1892 | case 'I': |
9431620d |
1893 | if (len == 3 && name1[1] == 'S' && name[2] == 'A') |
b9b0e72c |
1894 | goto yes; |
1895 | break; |
1896 | case 'O': |
9431620d |
1897 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c |
1898 | goto yes; |
1899 | break; |
1900 | case 'S': |
9431620d |
1901 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c |
1902 | goto yes; |
1903 | break; |
1904 | /* Using ${^...} variables is likely to be sufficiently rare that |
1905 | it seems sensible to avoid the space hit of also checking the |
1906 | length. */ |
1907 | case '\017': /* ${^OPEN} */ |
9431620d |
1908 | if (strEQ(name1, "PEN")) |
b9b0e72c |
1909 | goto yes; |
1910 | break; |
1911 | case '\024': /* ${^TAINT} */ |
9431620d |
1912 | if (strEQ(name1, "AINT")) |
b9b0e72c |
1913 | goto yes; |
1914 | break; |
1915 | case '\025': /* ${^UNICODE} */ |
9431620d |
1916 | if (strEQ(name1, "NICODE")) |
b9b0e72c |
1917 | goto yes; |
a0288114 |
1918 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 |
1919 | goto yes; |
b9b0e72c |
1920 | break; |
1921 | case '\027': /* ${^WARNING_BITS} */ |
9431620d |
1922 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c |
1923 | goto yes; |
1924 | break; |
1925 | case '1': |
1926 | case '2': |
1927 | case '3': |
1928 | case '4': |
1929 | case '5': |
1930 | case '6': |
1931 | case '7': |
1932 | case '8': |
1933 | case '9': |
c9d5ac95 |
1934 | { |
7fc63493 |
1935 | const char *end = name + len; |
c9d5ac95 |
1936 | while (--end > name) { |
1937 | if (!isDIGIT(*end)) |
1938 | return FALSE; |
1939 | } |
b9b0e72c |
1940 | goto yes; |
1941 | } |
1942 | } |
1943 | } else { |
1944 | /* Because we're already assuming that name is NUL terminated |
1945 | below, we can treat an empty name as "\0" */ |
1946 | switch (*name) { |
1947 | case '&': |
1948 | case '`': |
1949 | case '\'': |
1950 | case ':': |
1951 | case '?': |
1952 | case '!': |
1953 | case '-': |
1954 | case '#': |
1955 | case '[': |
1956 | case '^': |
1957 | case '~': |
1958 | case '=': |
1959 | case '%': |
1960 | case '.': |
1961 | case '(': |
1962 | case ')': |
1963 | case '<': |
1964 | case '>': |
1965 | case ',': |
1966 | case '\\': |
1967 | case '/': |
1968 | case '|': |
1969 | case '+': |
1970 | case ';': |
1971 | case ']': |
1972 | case '\001': /* $^A */ |
1973 | case '\003': /* $^C */ |
1974 | case '\004': /* $^D */ |
1975 | case '\005': /* $^E */ |
1976 | case '\006': /* $^F */ |
1977 | case '\010': /* $^H */ |
1978 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1979 | case '\014': /* $^L */ |
1980 | case '\016': /* $^N */ |
1981 | case '\017': /* $^O */ |
1982 | case '\020': /* $^P */ |
1983 | case '\023': /* $^S */ |
1984 | case '\024': /* $^T */ |
1985 | case '\026': /* $^V */ |
1986 | case '\027': /* $^W */ |
1987 | case '1': |
1988 | case '2': |
1989 | case '3': |
1990 | case '4': |
1991 | case '5': |
1992 | case '6': |
1993 | case '7': |
1994 | case '8': |
1995 | case '9': |
1996 | yes: |
1997 | return TRUE; |
1998 | default: |
1999 | break; |
c9d5ac95 |
2000 | } |
c9d5ac95 |
2001 | } |
2002 | return FALSE; |
2003 | } |
66610fdd |
2004 | |
2005 | /* |
2006 | * Local variables: |
2007 | * c-indentation-style: bsd |
2008 | * c-basic-offset: 4 |
2009 | * indent-tabs-mode: t |
2010 | * End: |
2011 | * |
37442d52 |
2012 | * ex: set ts=8 sts=4 sw=4 noet: |
2013 | */ |