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 | |
79072805 |
40 | GV * |
864dbfa3 |
41 | Perl_gv_AVadd(pTHX_ register GV *gv) |
79072805 |
42 | { |
a0d0e21e |
43 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
44 | Perl_croak(aTHX_ "Bad symbol for array"); |
79072805 |
45 | if (!GvAV(gv)) |
46 | GvAV(gv) = newAV(); |
47 | return gv; |
48 | } |
49 | |
50 | GV * |
864dbfa3 |
51 | Perl_gv_HVadd(pTHX_ register GV *gv) |
79072805 |
52 | { |
a0d0e21e |
53 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
54 | Perl_croak(aTHX_ "Bad symbol for hash"); |
79072805 |
55 | if (!GvHV(gv)) |
463ee0b2 |
56 | GvHV(gv) = newHV(); |
79072805 |
57 | return gv; |
58 | } |
59 | |
60 | GV * |
864dbfa3 |
61 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e |
62 | { |
63 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
64 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
5bd07a3d |
65 | if (!GvIOp(gv)) { |
7fb37951 |
66 | #ifdef GV_UNIQUE_CHECK |
67 | if (GvUNIQUE(gv)) { |
68 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); |
5bd07a3d |
69 | } |
70 | #endif |
a0d0e21e |
71 | GvIOp(gv) = newIO(); |
5bd07a3d |
72 | } |
a0d0e21e |
73 | return gv; |
74 | } |
75 | |
76 | GV * |
864dbfa3 |
77 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
78 | { |
eacec437 |
79 | char smallbuf[256]; |
53d95988 |
80 | char *tmpbuf; |
8ebc5c01 |
81 | STRLEN tmplen; |
79072805 |
82 | GV *gv; |
83 | |
1d7c1841 |
84 | if (!PL_defstash) |
85 | return Nullgv; |
86 | |
53d95988 |
87 | tmplen = strlen(name) + 2; |
88 | if (tmplen < sizeof smallbuf) |
89 | tmpbuf = smallbuf; |
90 | else |
91 | New(603, tmpbuf, tmplen + 1, char); |
0ac0412a |
92 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 |
93 | tmpbuf[0] = '_'; |
94 | tmpbuf[1] = '<'; |
95 | strcpy(tmpbuf + 2, name); |
3280af22 |
96 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
97 | if (!isGV(gv)) { |
3280af22 |
98 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
1d7c1841 |
99 | sv_setpv(GvSV(gv), name); |
100 | if (PERLDB_LINE) |
14befaf4 |
101 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile); |
1d7c1841 |
102 | } |
53d95988 |
103 | if (tmpbuf != smallbuf) |
104 | Safefree(tmpbuf); |
79072805 |
105 | return gv; |
106 | } |
107 | |
463ee0b2 |
108 | void |
864dbfa3 |
109 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
110 | { |
27da23d5 |
111 | dVAR; |
463ee0b2 |
112 | register GP *gp; |
e1ec3a88 |
113 | const bool doproto = SvTYPE(gv) > SVt_NULL; |
b15aece3 |
114 | const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL; |
463ee0b2 |
115 | |
dc437b57 |
116 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
117 | if (SvLEN(gv)) { |
118 | if (proto) { |
f880fe2f |
119 | SvPV_set(gv, NULL); |
b162af07 |
120 | SvLEN_set(gv, 0); |
55d729e4 |
121 | SvPOK_off(gv); |
122 | } else |
94010e71 |
123 | Safefree(SvPVX_mutable(gv)); |
55d729e4 |
124 | } |
44a8e56a |
125 | Newz(602, gp, 1, GP); |
8990e307 |
126 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
127 | GvSV(gv) = NEWSV(72,0); |
1d7c1841 |
128 | GvLINE(gv) = CopLINE(PL_curcop); |
07409e01 |
129 | /* XXX Ideally this cast would be replaced with a change to const char* |
130 | in the struct. */ |
131 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) ""; |
005a453c |
132 | GvCVGEN(gv) = 0; |
463ee0b2 |
133 | GvEGV(gv) = gv; |
14befaf4 |
134 | sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0); |
e15faf7d |
135 | GvSTASH(gv) = stash; |
136 | if (stash) |
137 | Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv); |
a0d0e21e |
138 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
139 | GvNAMELEN(gv) = len; |
23ad5bf5 |
140 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
141 | GvMULTI_on(gv); |
55d729e4 |
142 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
143 | SvIOK_off(gv); |
55d729e4 |
144 | ENTER; |
b099ddc0 |
145 | /* XXX unsafe for threads if eval_owner isn't held */ |
55d729e4 |
146 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 |
147 | GvCV(gv) = PL_compcv; |
55d729e4 |
148 | LEAVE; |
149 | |
3280af22 |
150 | PL_sub_generation++; |
65c50114 |
151 | CvGV(GvCV(gv)) = gv; |
e0d088d0 |
152 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 |
153 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
154 | if (proto) { |
155 | sv_setpv((SV*)GvCV(gv), proto); |
156 | Safefree(proto); |
157 | } |
158 | } |
463ee0b2 |
159 | } |
160 | |
76e3520e |
161 | STATIC void |
cea2e8a9 |
162 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
163 | { |
164 | switch (sv_type) { |
165 | case SVt_PVIO: |
166 | (void)GvIOn(gv); |
167 | break; |
168 | case SVt_PVAV: |
169 | (void)GvAVn(gv); |
170 | break; |
171 | case SVt_PVHV: |
172 | (void)GvHVn(gv); |
173 | break; |
174 | } |
175 | } |
176 | |
954c1994 |
177 | /* |
178 | =for apidoc gv_fetchmeth |
179 | |
180 | Returns the glob with the given C<name> and a defined subroutine or |
181 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
182 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
183 | |
184 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
185 | side-effect creates a glob with the given C<name> in the given C<stash> |
186 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
187 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
188 | |
189 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
190 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
191 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
192 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
193 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
194 | |
195 | =cut |
196 | */ |
197 | |
79072805 |
198 | GV * |
864dbfa3 |
199 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
200 | { |
201 | AV* av; |
463ee0b2 |
202 | GV* topgv; |
79072805 |
203 | GV* gv; |
463ee0b2 |
204 | GV** gvp; |
748a9306 |
205 | CV* cv; |
bfcb3514 |
206 | const char *hvname; |
a0d0e21e |
207 | |
af09ea45 |
208 | /* UNIVERSAL methods should be callable without a stash */ |
209 | if (!stash) { |
210 | level = -1; /* probably appropriate */ |
211 | if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE))) |
212 | return 0; |
213 | } |
214 | |
bfcb3514 |
215 | hvname = HvNAME_get(stash); |
216 | if (!hvname) |
e27ad1f2 |
217 | Perl_croak(aTHX_ |
218 | "Can't use anonymous symbol table for method lookup"); |
219 | |
44a8e56a |
220 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
221 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
bfcb3514 |
222 | name, hvname); |
463ee0b2 |
223 | |
bfcb3514 |
224 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a |
225 | |
226 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
227 | if (!gvp) |
228 | topgv = Nullgv; |
229 | else { |
230 | topgv = *gvp; |
231 | if (SvTYPE(topgv) != SVt_PVGV) |
232 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
233 | if ((cv = GvCV(topgv))) { |
44a8e56a |
234 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
235 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
236 | return topgv; |
44a8e56a |
237 | /* Stale cached entry: junk it */ |
238 | SvREFCNT_dec(cv); |
239 | GvCV(topgv) = cv = Nullcv; |
240 | GvCVGEN(topgv) = 0; |
748a9306 |
241 | } |
3280af22 |
242 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
243 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
244 | } |
79072805 |
245 | |
9607fc9c |
246 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
247 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
248 | |
fb73857a |
249 | /* create and re-create @.*::SUPER::ISA on demand */ |
250 | if (!av || !SvMAGIC(av)) { |
7423f6db |
251 | STRLEN packlen = HvNAMELEN_get(stash); |
9607fc9c |
252 | |
bfcb3514 |
253 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { |
9607fc9c |
254 | HV* basestash; |
255 | |
256 | packlen -= 7; |
bfcb3514 |
257 | basestash = gv_stashpvn(hvname, packlen, TRUE); |
9607fc9c |
258 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
259 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
9607fc9c |
260 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
261 | if (!gvp || !(gv = *gvp)) |
bfcb3514 |
262 | Perl_croak(aTHX_ "Cannot create %s::ISA", hvname); |
9607fc9c |
263 | if (SvTYPE(gv) != SVt_PVGV) |
264 | gv_init(gv, stash, "ISA", 3, TRUE); |
265 | SvREFCNT_dec(GvAV(gv)); |
266 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
267 | } |
268 | } |
269 | } |
270 | |
271 | if (av) { |
79072805 |
272 | SV** svp = AvARRAY(av); |
93965878 |
273 | /* NOTE: No support for tied ISA */ |
274 | I32 items = AvFILLp(av) + 1; |
79072805 |
275 | while (items--) { |
79072805 |
276 | SV* sv = *svp++; |
a0d0e21e |
277 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
278 | if (!basestash) { |
599cee73 |
279 | if (ckWARN(WARN_MISC)) |
35c1215d |
280 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA", |
bfcb3514 |
281 | sv, hvname); |
79072805 |
282 | continue; |
283 | } |
44a8e56a |
284 | gv = gv_fetchmeth(basestash, name, len, |
285 | (level >= 0) ? level + 1 : level - 1); |
286 | if (gv) |
287 | goto gotcha; |
79072805 |
288 | } |
289 | } |
a0d0e21e |
290 | |
9607fc9c |
291 | /* if at top level, try UNIVERSAL */ |
292 | |
44a8e56a |
293 | if (level == 0 || level == -1) { |
9607fc9c |
294 | HV* lastchance; |
295 | |
155aba94 |
296 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
297 | if ((gv = gv_fetchmeth(lastchance, name, len, |
298 | (level >= 0) ? level + 1 : level - 1))) |
299 | { |
44a8e56a |
300 | gotcha: |
dc848c6f |
301 | /* |
302 | * Cache method in topgv if: |
303 | * 1. topgv has no synonyms (else inheritance crosses wires) |
304 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
305 | */ |
306 | if (topgv && |
307 | GvREFCNT(topgv) == 1 && |
308 | (cv = GvCV(gv)) && |
309 | (CvROOT(cv) || CvXSUB(cv))) |
310 | { |
155aba94 |
311 | if ((cv = GvCV(topgv))) |
44a8e56a |
312 | SvREFCNT_dec(cv); |
313 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
314 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
315 | } |
a0d0e21e |
316 | return gv; |
317 | } |
005a453c |
318 | else if (topgv && GvREFCNT(topgv) == 1) { |
319 | /* cache the fact that the method is not defined */ |
3280af22 |
320 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
321 | } |
a0d0e21e |
322 | } |
323 | } |
324 | |
79072805 |
325 | return 0; |
326 | } |
327 | |
954c1994 |
328 | /* |
611c1e95 |
329 | =for apidoc gv_fetchmeth_autoload |
330 | |
331 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. |
332 | Returns a glob for the subroutine. |
333 | |
334 | For an autoloaded subroutine without a GV, will create a GV even |
335 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() |
336 | of the result may be zero. |
337 | |
338 | =cut |
339 | */ |
340 | |
341 | GV * |
342 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
343 | { |
344 | GV *gv = gv_fetchmeth(stash, name, len, level); |
345 | |
346 | if (!gv) { |
611c1e95 |
347 | CV *cv; |
348 | GV **gvp; |
349 | |
350 | if (!stash) |
351 | return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
5c7983e5 |
352 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
611c1e95 |
353 | return Nullgv; |
5c7983e5 |
354 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
611c1e95 |
355 | return Nullgv; |
356 | cv = GvCV(gv); |
357 | if (!(CvROOT(cv) || CvXSUB(cv))) |
358 | return Nullgv; |
359 | /* Have an autoload */ |
360 | if (level < 0) /* Cannot do without a stub */ |
361 | gv_fetchmeth(stash, name, len, 0); |
362 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
363 | if (!gvp) |
364 | return Nullgv; |
365 | return *gvp; |
366 | } |
367 | return gv; |
368 | } |
369 | |
370 | /* |
954c1994 |
371 | =for apidoc gv_fetchmethod |
372 | |
6d0f518e |
373 | See L<gv_fetchmethod_autoload>. |
954c1994 |
374 | |
375 | =cut |
376 | */ |
377 | |
79072805 |
378 | GV * |
864dbfa3 |
379 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
463ee0b2 |
380 | { |
dc848c6f |
381 | return gv_fetchmethod_autoload(stash, name, TRUE); |
382 | } |
383 | |
954c1994 |
384 | /* |
385 | =for apidoc gv_fetchmethod_autoload |
386 | |
387 | Returns the glob which contains the subroutine to call to invoke the method |
388 | on the C<stash>. In fact in the presence of autoloading this may be the |
389 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
390 | already setup. |
954c1994 |
391 | |
392 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
393 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
394 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
395 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
396 | with a non-zero C<autoload> parameter. |
954c1994 |
397 | |
398 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
399 | that if you want to keep the returned glob for a long time, you need to |
400 | check for it being "AUTOLOAD", since at the later time the call may load a |
401 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
402 | created via a side effect to do this. |
954c1994 |
403 | |
404 | These functions have the same side-effects and as C<gv_fetchmeth> with |
405 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
406 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
407 | C<call_sv> apply equally to these functions. |
954c1994 |
408 | |
409 | =cut |
410 | */ |
411 | |
dc848c6f |
412 | GV * |
864dbfa3 |
413 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
414 | { |
08105a92 |
415 | register const char *nend; |
416 | const char *nsplit = 0; |
a0d0e21e |
417 | GV* gv; |
0dae17bd |
418 | HV* ostash = stash; |
419 | |
420 | if (stash && SvTYPE(stash) < SVt_PVHV) |
421 | stash = Nullhv; |
b267980d |
422 | |
463ee0b2 |
423 | for (nend = name; *nend; nend++) { |
9607fc9c |
424 | if (*nend == '\'') |
a0d0e21e |
425 | nsplit = nend; |
9607fc9c |
426 | else if (*nend == ':' && *(nend + 1) == ':') |
427 | nsplit = ++nend; |
a0d0e21e |
428 | } |
429 | if (nsplit) { |
9d4ba2ae |
430 | const char * const origname = name; |
a0d0e21e |
431 | name = nsplit + 1; |
a0d0e21e |
432 | if (*nsplit == ':') |
433 | --nsplit; |
9607fc9c |
434 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
435 | /* ->SUPER::method should really be looked up in original stash */ |
cea2e8a9 |
436 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
437 | CopSTASHPV(PL_curcop))); |
af09ea45 |
438 | /* __PACKAGE__::SUPER stash should be autovivified */ |
b15aece3 |
439 | stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
440 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 |
441 | origname, HvNAME_get(stash), name) ); |
4633a7c4 |
442 | } |
e189a56d |
443 | else { |
af09ea45 |
444 | /* don't autovifify if ->NoSuchStash::method */ |
445 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); |
e189a56d |
446 | |
447 | /* however, explicit calls to Pkg::SUPER::method may |
448 | happen, and may require autovivification to work */ |
449 | if (!stash && (nsplit - origname) >= 7 && |
450 | strnEQ(nsplit - 7, "::SUPER", 7) && |
451 | gv_stashpvn(origname, nsplit - origname - 7, FALSE)) |
452 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
453 | } |
0dae17bd |
454 | ostash = stash; |
4633a7c4 |
455 | } |
456 | |
9607fc9c |
457 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
458 | if (!gv) { |
2f6e0fe7 |
459 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
460 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
461 | else if (autoload) |
0dae17bd |
462 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 |
463 | } |
dc848c6f |
464 | else if (autoload) { |
9d4ba2ae |
465 | CV* const cv = GvCV(gv); |
09280a33 |
466 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
467 | GV* stubgv; |
468 | GV* autogv; |
469 | |
470 | if (CvANON(cv)) |
471 | stubgv = gv; |
472 | else { |
473 | stubgv = CvGV(cv); |
474 | if (GvCV(stubgv) != cv) /* orphaned import */ |
475 | stubgv = gv; |
476 | } |
477 | autogv = gv_autoload4(GvSTASH(stubgv), |
478 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
479 | if (autogv) |
480 | gv = autogv; |
481 | } |
482 | } |
44a8e56a |
483 | |
484 | return gv; |
485 | } |
486 | |
487 | GV* |
864dbfa3 |
488 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
489 | { |
27da23d5 |
490 | dVAR; |
44a8e56a |
491 | GV* gv; |
492 | CV* cv; |
493 | HV* varstash; |
494 | GV* vargv; |
495 | SV* varsv; |
e1ec3a88 |
496 | const char *packname = ""; |
7423f6db |
497 | STRLEN packname_len; |
44a8e56a |
498 | |
5c7983e5 |
499 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
44a8e56a |
500 | return Nullgv; |
0dae17bd |
501 | if (stash) { |
502 | if (SvTYPE(stash) < SVt_PVHV) { |
e62f0680 |
503 | packname = SvPV_const((SV*)stash, packname_len); |
0dae17bd |
504 | stash = Nullhv; |
505 | } |
506 | else { |
bfcb3514 |
507 | packname = HvNAME_get(stash); |
7423f6db |
508 | packname_len = HvNAMELEN_get(stash); |
0dae17bd |
509 | } |
510 | } |
5c7983e5 |
511 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
dc848c6f |
512 | return Nullgv; |
513 | cv = GvCV(gv); |
514 | |
adb5a9ae |
515 | if (!(CvROOT(cv) || CvXSUB(cv))) |
ed850460 |
516 | return Nullgv; |
517 | |
dc848c6f |
518 | /* |
519 | * Inheriting AUTOLOAD for non-methods works ... for now. |
520 | */ |
12bcd1a6 |
521 | if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && !method && |
599cee73 |
522 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
12bcd1a6 |
523 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f |
524 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd |
525 | packname, (int)len, name); |
44a8e56a |
526 | |
adb5a9ae |
527 | if (CvXSUB(cv)) { |
528 | /* rather than lookup/init $AUTOLOAD here |
529 | * only to have the XSUB do another lookup for $AUTOLOAD |
530 | * and split that value on the last '::', |
531 | * pass along the same data via some unused fields in the CV |
532 | */ |
533 | CvSTASH(cv) = stash; |
f880fe2f |
534 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 |
535 | SvCUR_set(cv, len); |
adb5a9ae |
536 | return gv; |
537 | } |
adb5a9ae |
538 | |
44a8e56a |
539 | /* |
540 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
541 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
542 | * use that, but for lack of anything better we will use the sub's |
543 | * original package to look up $AUTOLOAD. |
544 | */ |
545 | varstash = GvSTASH(CvGV(cv)); |
5c7983e5 |
546 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b |
547 | ENTER; |
548 | |
44a8e56a |
549 | if (!isGV(vargv)) |
5c7983e5 |
550 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
3d35f11b |
551 | LEAVE; |
44a8e56a |
552 | varsv = GvSV(vargv); |
7423f6db |
553 | sv_setpvn(varsv, packname, packname_len); |
44a8e56a |
554 | sv_catpvn(varsv, "::", 2); |
555 | sv_catpvn(varsv, name, len); |
556 | SvTAINTED_off(varsv); |
a0d0e21e |
557 | return gv; |
558 | } |
559 | |
d2c93421 |
560 | /* The "gv" parameter should be the glob known to Perl code as *! |
561 | * The scalar must already have been magicalized. |
562 | */ |
563 | STATIC void |
564 | S_require_errno(pTHX_ GV *gv) |
565 | { |
27da23d5 |
566 | dVAR; |
d2c93421 |
567 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
568 | |
a0288114 |
569 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
d2c93421 |
570 | dSP; |
571 | PUTBACK; |
572 | ENTER; |
573 | save_scalar(gv); /* keep the value of $! */ |
84f1fa11 |
574 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
575 | newSVpvn("Errno",5), Nullsv); |
d2c93421 |
576 | LEAVE; |
577 | SPAGAIN; |
578 | stash = gv_stashpvn("Errno",5,FALSE); |
579 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
580 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
581 | } |
582 | } |
583 | |
954c1994 |
584 | /* |
585 | =for apidoc gv_stashpv |
586 | |
386d01d6 |
587 | Returns a pointer to the stash for a specified package. C<name> should |
bc96cb06 |
588 | be a valid UTF-8 string and must be null-terminated. If C<create> is set |
589 | then the package will be created if it does not already exist. If C<create> |
590 | is not set and the package does not exist then NULL is returned. |
954c1994 |
591 | |
592 | =cut |
593 | */ |
594 | |
a0d0e21e |
595 | HV* |
864dbfa3 |
596 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
597 | { |
dc437b57 |
598 | return gv_stashpvn(name, strlen(name), create); |
599 | } |
600 | |
bc96cb06 |
601 | /* |
602 | =for apidoc gv_stashpvn |
603 | |
604 | Returns a pointer to the stash for a specified package. C<name> should |
605 | be a valid UTF-8 string. The C<namelen> parameter indicates the length of |
606 | the C<name>, in bytes. If C<create> is set then the package will be |
607 | created if it does not already exist. If C<create> is not set and the |
608 | package does not exist then NULL is returned. |
609 | |
610 | =cut |
611 | */ |
612 | |
dc437b57 |
613 | HV* |
864dbfa3 |
614 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
615 | { |
46fc3d4c |
616 | char smallbuf[256]; |
617 | char *tmpbuf; |
a0d0e21e |
618 | HV *stash; |
619 | GV *tmpgv; |
dc437b57 |
620 | |
46fc3d4c |
621 | if (namelen + 3 < sizeof smallbuf) |
622 | tmpbuf = smallbuf; |
623 | else |
624 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
625 | Copy(name,tmpbuf,namelen,char); |
626 | tmpbuf[namelen++] = ':'; |
627 | tmpbuf[namelen++] = ':'; |
628 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
629 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
630 | if (tmpbuf != smallbuf) |
631 | Safefree(tmpbuf); |
a0d0e21e |
632 | if (!tmpgv) |
633 | return 0; |
634 | if (!GvHV(tmpgv)) |
635 | GvHV(tmpgv) = newHV(); |
636 | stash = GvHV(tmpgv); |
bfcb3514 |
637 | if (!HvNAME_get(stash)) |
638 | Perl_hv_name_set(aTHX_ stash, name, namelen, 0); |
a0d0e21e |
639 | return stash; |
463ee0b2 |
640 | } |
641 | |
954c1994 |
642 | /* |
643 | =for apidoc gv_stashsv |
644 | |
386d01d6 |
645 | Returns a pointer to the stash for a specified package, which must be a |
646 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
647 | |
648 | =cut |
649 | */ |
650 | |
a0d0e21e |
651 | HV* |
864dbfa3 |
652 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
653 | { |
dc437b57 |
654 | STRLEN len; |
9d4ba2ae |
655 | const char * const ptr = SvPV_const(sv,len); |
dc437b57 |
656 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
657 | } |
658 | |
659 | |
463ee0b2 |
660 | GV * |
7a5fd60d |
661 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { |
b7787f18 |
662 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d |
663 | } |
664 | |
665 | GV * |
666 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) { |
667 | STRLEN len; |
9d4ba2ae |
668 | const char * const nambeg = SvPV_const(name, len); |
7a5fd60d |
669 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
670 | } |
671 | |
672 | GV * |
673 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, |
674 | I32 sv_type) |
79072805 |
675 | { |
08105a92 |
676 | register const char *name = nambeg; |
463ee0b2 |
677 | register GV *gv = 0; |
79072805 |
678 | GV**gvp; |
79072805 |
679 | I32 len; |
08105a92 |
680 | register const char *namend; |
463ee0b2 |
681 | HV *stash = 0; |
dd374669 |
682 | const I32 add = flags & ~SVf_UTF8; |
683 | (void)full_len; |
79072805 |
684 | |
c07a80fd |
685 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
686 | name++; |
687 | |
79072805 |
688 | for (namend = name; *namend; namend++) { |
1d7c1841 |
689 | if ((*namend == ':' && namend[1] == ':') |
690 | || (*namend == '\'' && namend[1])) |
463ee0b2 |
691 | { |
463ee0b2 |
692 | if (!stash) |
3280af22 |
693 | stash = PL_defstash; |
dc437b57 |
694 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
695 | return Nullgv; |
463ee0b2 |
696 | |
85e6fe83 |
697 | len = namend - name; |
698 | if (len > 0) { |
3c78fafa |
699 | char smallbuf[256]; |
62b57502 |
700 | char *tmpbuf; |
62b57502 |
701 | |
25c09a70 |
702 | if (len + 3 < sizeof (smallbuf)) |
3c78fafa |
703 | tmpbuf = smallbuf; |
62b57502 |
704 | else |
705 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
706 | Copy(name, tmpbuf, len, char); |
707 | tmpbuf[len++] = ':'; |
708 | tmpbuf[len++] = ':'; |
709 | tmpbuf[len] = '\0'; |
463ee0b2 |
710 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
711 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
712 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
713 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
714 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
715 | else |
716 | GvMULTI_on(gv); |
717 | } |
3c78fafa |
718 | if (tmpbuf != smallbuf) |
62b57502 |
719 | Safefree(tmpbuf); |
3280af22 |
720 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
721 | return Nullgv; |
85e6fe83 |
722 | |
463ee0b2 |
723 | if (!(stash = GvHV(gv))) |
724 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
725 | |
bfcb3514 |
726 | if (!HvNAME_get(stash)) |
6e3207c2 |
727 | Perl_hv_name_set(aTHX_ stash, nambeg, namend - nambeg, 0); |
463ee0b2 |
728 | } |
729 | |
730 | if (*namend == ':') |
731 | namend++; |
732 | namend++; |
733 | name = namend; |
734 | if (!*name) |
3280af22 |
735 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
736 | } |
79072805 |
737 | } |
a0d0e21e |
738 | len = namend - name; |
463ee0b2 |
739 | |
740 | /* No stash in name, so see how we can default */ |
741 | |
742 | if (!stash) { |
7e2040f0 |
743 | if (isIDFIRST_lazy(name)) { |
9607fc9c |
744 | bool global = FALSE; |
745 | |
18ea00d7 |
746 | /* name is always \0 terminated, and initial \0 wouldn't return |
747 | true from isIDFIRST_lazy, so we know that name[1] is defined */ |
748 | switch (name[1]) { |
749 | case '\0': |
750 | if (*name == '_') |
9d116dd7 |
751 | global = TRUE; |
18ea00d7 |
752 | break; |
753 | case 'N': |
754 | if (strEQ(name, "INC") || strEQ(name, "ENV")) |
9d116dd7 |
755 | global = TRUE; |
18ea00d7 |
756 | break; |
757 | case 'I': |
758 | if (strEQ(name, "SIG")) |
9d116dd7 |
759 | global = TRUE; |
18ea00d7 |
760 | break; |
761 | case 'T': |
762 | if (strEQ(name, "STDIN") || strEQ(name, "STDOUT") || |
763 | strEQ(name, "STDERR")) |
463ee0b2 |
764 | global = TRUE; |
18ea00d7 |
765 | break; |
766 | case 'R': |
767 | if (strEQ(name, "ARGV") || strEQ(name, "ARGVOUT")) |
768 | global = TRUE; |
769 | break; |
463ee0b2 |
770 | } |
9607fc9c |
771 | |
463ee0b2 |
772 | if (global) |
3280af22 |
773 | stash = PL_defstash; |
923e4eb5 |
774 | else if (IN_PERL_COMPILETIME) { |
3280af22 |
775 | stash = PL_curstash; |
776 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
777 | sv_type != SVt_PVCV && |
778 | sv_type != SVt_PVGV && |
4633a7c4 |
779 | sv_type != SVt_PVFM && |
c07a80fd |
780 | sv_type != SVt_PVIO && |
70ec6265 |
781 | !(len == 1 && sv_type == SVt_PV && |
782 | (*name == 'a' || *name == 'b')) ) |
748a9306 |
783 | { |
4633a7c4 |
784 | gvp = (GV**)hv_fetch(stash,name,len,0); |
785 | if (!gvp || |
3280af22 |
786 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
787 | SvTYPE(*gvp) != SVt_PVGV) |
788 | { |
4633a7c4 |
789 | stash = 0; |
a5f75d66 |
790 | } |
155aba94 |
791 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
792 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
793 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
794 | { |
cea2e8a9 |
795 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
796 | sv_type == SVt_PVAV ? '@' : |
797 | sv_type == SVt_PVHV ? '%' : '$', |
798 | name); |
8ebc5c01 |
799 | if (GvCVu(*gvp)) |
cc507455 |
800 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
801 | stash = 0; |
4633a7c4 |
802 | } |
a0d0e21e |
803 | } |
85e6fe83 |
804 | } |
463ee0b2 |
805 | else |
1d7c1841 |
806 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
807 | } |
808 | else |
3280af22 |
809 | stash = PL_defstash; |
463ee0b2 |
810 | } |
811 | |
812 | /* By this point we should have a stash and a name */ |
813 | |
a0d0e21e |
814 | if (!stash) { |
5a844595 |
815 | if (add) { |
9d4ba2ae |
816 | SV * const err = Perl_mess(aTHX_ |
5a844595 |
817 | "Global symbol \"%s%s\" requires explicit package name", |
818 | (sv_type == SVt_PV ? "$" |
819 | : sv_type == SVt_PVAV ? "@" |
820 | : sv_type == SVt_PVHV ? "%" |
608b3986 |
821 | : ""), name); |
822 | if (USE_UTF8_IN_NAMES) |
823 | SvUTF8_on(err); |
824 | qerror(err); |
d7aacf4e |
825 | stash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV)); |
a0d0e21e |
826 | } |
d7aacf4e |
827 | else |
828 | return Nullgv; |
a0d0e21e |
829 | } |
830 | |
831 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
832 | return Nullgv; |
833 | |
79072805 |
834 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
835 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
836 | return Nullgv; |
837 | gv = *gvp; |
838 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
839 | if (add) { |
a5f75d66 |
840 | GvMULTI_on(gv); |
a0d0e21e |
841 | gv_init_sv(gv, sv_type); |
d2c93421 |
842 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
843 | require_errno(gv); |
a0d0e21e |
844 | } |
79072805 |
845 | return gv; |
55d729e4 |
846 | } else if (add & GV_NOINIT) { |
847 | return gv; |
79072805 |
848 | } |
93a17b20 |
849 | |
850 | /* Adding a new symbol */ |
851 | |
0453d815 |
852 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d |
853 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 |
854 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
855 | gv_init_sv(gv, sv_type); |
93a17b20 |
856 | |
a0288114 |
857 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d |
858 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
859 | GvMULTI_on(gv) ; |
860 | |
93a17b20 |
861 | /* set up magic where warranted */ |
cc4c2da6 |
862 | if (len > 1) { |
9431620d |
863 | #ifndef EBCDIC |
cc4c2da6 |
864 | if (*name > 'V' ) { |
865 | /* Nothing else to do. |
91f565cb |
866 | The compiler will probably turn the switch statement into a |
cc4c2da6 |
867 | branch table. Make sure we avoid even that small overhead for |
868 | the common case of lower case variable names. */ |
9431620d |
869 | } else |
870 | #endif |
871 | { |
b464bac0 |
872 | const char * const name2 = name + 1; |
cc4c2da6 |
873 | switch (*name) { |
874 | case 'A': |
875 | if (strEQ(name2, "RGV")) { |
876 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
877 | } |
878 | break; |
879 | case 'E': |
880 | if (strnEQ(name2, "XPORT", 5)) |
881 | GvMULTI_on(gv); |
882 | break; |
883 | case 'I': |
884 | if (strEQ(name2, "SA")) { |
9d4ba2ae |
885 | AV* const av = GvAVn(gv); |
cc4c2da6 |
886 | GvMULTI_on(gv); |
887 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0); |
888 | /* NOTE: No support for tied ISA */ |
889 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
890 | && AvFILLp(av) == -1) |
891 | { |
e1ec3a88 |
892 | const char *pname; |
cc4c2da6 |
893 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
894 | gv_stashpvn(pname, 9, TRUE); |
895 | av_push(av, newSVpvn(pname = "DB_File",7)); |
896 | gv_stashpvn(pname, 7, TRUE); |
897 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
898 | gv_stashpvn(pname, 9, TRUE); |
899 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
900 | gv_stashpvn(pname, 9, TRUE); |
901 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
902 | gv_stashpvn(pname, 9, TRUE); |
903 | } |
904 | } |
905 | break; |
906 | case 'O': |
907 | if (strEQ(name2, "VERLOAD")) { |
9d4ba2ae |
908 | HV* const hv = GvHVn(gv); |
cc4c2da6 |
909 | GvMULTI_on(gv); |
910 | hv_magic(hv, Nullgv, PERL_MAGIC_overload); |
911 | } |
912 | break; |
913 | case 'S': |
914 | if (strEQ(name2, "IG")) { |
915 | HV *hv; |
916 | I32 i; |
917 | if (!PL_psig_ptr) { |
918 | Newz(73, PL_psig_ptr, SIG_SIZE, SV*); |
919 | Newz(73, PL_psig_name, SIG_SIZE, SV*); |
920 | Newz(73, PL_psig_pend, SIG_SIZE, int); |
921 | } |
922 | GvMULTI_on(gv); |
923 | hv = GvHVn(gv); |
924 | hv_magic(hv, Nullgv, PERL_MAGIC_sig); |
925 | for (i = 1; i < SIG_SIZE; i++) { |
9d4ba2ae |
926 | SV ** const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 |
927 | if (init) |
928 | sv_setsv(*init, &PL_sv_undef); |
929 | PL_psig_ptr[i] = 0; |
930 | PL_psig_name[i] = 0; |
931 | PL_psig_pend[i] = 0; |
932 | } |
933 | } |
934 | break; |
935 | case 'V': |
936 | if (strEQ(name2, "ERSION")) |
937 | GvMULTI_on(gv); |
938 | break; |
e5218da5 |
939 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
940 | if (strEQ(name2, "HILD_ERROR_NATIVE")) |
941 | goto magicalize; |
942 | break; |
cc4c2da6 |
943 | case '\005': /* $^ENCODING */ |
944 | if (strEQ(name2, "NCODING")) |
945 | goto magicalize; |
946 | break; |
947 | case '\017': /* $^OPEN */ |
948 | if (strEQ(name2, "PEN")) |
949 | goto magicalize; |
950 | break; |
951 | case '\024': /* ${^TAINT} */ |
952 | if (strEQ(name2, "AINT")) |
953 | goto ro_magicalize; |
954 | break; |
7cebcbc0 |
955 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 |
956 | if (strEQ(name2, "NICODE")) |
cc4c2da6 |
957 | goto ro_magicalize; |
a0288114 |
958 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 |
959 | goto ro_magicalize; |
cc4c2da6 |
960 | break; |
961 | case '\027': /* $^WARNING_BITS */ |
962 | if (strEQ(name2, "ARNING_BITS")) |
963 | goto magicalize; |
964 | break; |
965 | case '1': |
966 | case '2': |
967 | case '3': |
968 | case '4': |
969 | case '5': |
970 | case '6': |
971 | case '7': |
972 | case '8': |
973 | case '9': |
85e6fe83 |
974 | { |
cc4c2da6 |
975 | /* ensures variable is only digits */ |
976 | /* ${"1foo"} fails this test (and is thus writeable) */ |
977 | /* added by japhy, but borrowed from is_gv_magical */ |
978 | const char *end = name + len; |
979 | while (--end > name) { |
980 | if (!isDIGIT(*end)) return gv; |
981 | } |
982 | goto ro_magicalize; |
1d7c1841 |
983 | } |
dc437b57 |
984 | } |
93a17b20 |
985 | } |
392db708 |
986 | } else { |
987 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will |
988 | be case '\0' in this switch statement (ie a default case) */ |
cc4c2da6 |
989 | switch (*name) { |
990 | case '&': |
991 | case '`': |
992 | case '\'': |
993 | if ( |
994 | sv_type == SVt_PVAV || |
995 | sv_type == SVt_PVHV || |
996 | sv_type == SVt_PVCV || |
997 | sv_type == SVt_PVFM || |
998 | sv_type == SVt_PVIO |
999 | ) { break; } |
1000 | PL_sawampersand = TRUE; |
1001 | goto ro_magicalize; |
1002 | |
1003 | case ':': |
1004 | sv_setpv(GvSV(gv),PL_chopset); |
1005 | goto magicalize; |
1006 | |
1007 | case '?': |
ff0cee69 |
1008 | #ifdef COMPLEX_STATUS |
862a34c6 |
1009 | SvUPGRADE(GvSV(gv), SVt_PVLV); |
ff0cee69 |
1010 | #endif |
cc4c2da6 |
1011 | goto magicalize; |
ff0cee69 |
1012 | |
cc4c2da6 |
1013 | case '!': |
d2c93421 |
1014 | |
cc4c2da6 |
1015 | /* If %! has been used, automatically load Errno.pm. |
1016 | The require will itself set errno, so in order to |
1017 | preserve its value we have to set up the magic |
1018 | now (rather than going to magicalize) |
1019 | */ |
d2c93421 |
1020 | |
cc4c2da6 |
1021 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
1022 | |
cc4c2da6 |
1023 | if (sv_type == SVt_PVHV) |
1024 | require_errno(gv); |
d2c93421 |
1025 | |
6cef1e77 |
1026 | break; |
cc4c2da6 |
1027 | case '-': |
1028 | { |
9d4ba2ae |
1029 | AV* const av = GvAVn(gv); |
14befaf4 |
1030 | sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
1031 | SvREADONLY_on(av); |
cc4c2da6 |
1032 | goto magicalize; |
1033 | } |
1034 | case '*': |
cc4c2da6 |
1035 | case '#': |
1036 | if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) |
1037 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
8ae1fe26 |
1038 | "$%c is no longer supported", *name); |
1039 | break; |
cc4c2da6 |
1040 | case '|': |
1041 | sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
1042 | goto magicalize; |
1043 | |
1044 | case '+': |
1045 | { |
9d4ba2ae |
1046 | AV* const av = GvAVn(gv); |
14befaf4 |
1047 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
1048 | SvREADONLY_on(av); |
cc4c2da6 |
1049 | /* FALL THROUGH */ |
e521374c |
1050 | } |
cc4c2da6 |
1051 | case '\023': /* $^S */ |
1052 | case '1': |
1053 | case '2': |
1054 | case '3': |
1055 | case '4': |
1056 | case '5': |
1057 | case '6': |
1058 | case '7': |
1059 | case '8': |
1060 | case '9': |
1061 | ro_magicalize: |
1062 | SvREADONLY_on(GvSV(gv)); |
1063 | /* FALL THROUGH */ |
1064 | case '[': |
1065 | case '^': |
1066 | case '~': |
1067 | case '=': |
1068 | case '%': |
1069 | case '.': |
1070 | case '(': |
1071 | case ')': |
1072 | case '<': |
1073 | case '>': |
1074 | case ',': |
1075 | case '\\': |
1076 | case '/': |
1077 | case '\001': /* $^A */ |
1078 | case '\003': /* $^C */ |
1079 | case '\004': /* $^D */ |
1080 | case '\005': /* $^E */ |
1081 | case '\006': /* $^F */ |
1082 | case '\010': /* $^H */ |
1083 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1084 | case '\016': /* $^N */ |
1085 | case '\017': /* $^O */ |
1086 | case '\020': /* $^P */ |
1087 | case '\024': /* $^T */ |
1088 | case '\027': /* $^W */ |
1089 | magicalize: |
1090 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
1091 | break; |
e521374c |
1092 | |
cc4c2da6 |
1093 | case '\014': /* $^L */ |
616d8c9c |
1094 | sv_setpvn(GvSV(gv),"\f",1); |
cc4c2da6 |
1095 | PL_formfeed = GvSV(gv); |
463ee0b2 |
1096 | break; |
cc4c2da6 |
1097 | case ';': |
616d8c9c |
1098 | sv_setpvn(GvSV(gv),"\034",1); |
463ee0b2 |
1099 | break; |
cc4c2da6 |
1100 | case ']': |
1101 | { |
9d4ba2ae |
1102 | SV * const sv = GvSV(gv); |
d7aa5382 |
1103 | if (!sv_derived_from(PL_patchlevel, "version")) |
1104 | (void *)upg_version(PL_patchlevel); |
7d54d38e |
1105 | GvSV(gv) = vnumify(PL_patchlevel); |
1106 | SvREADONLY_on(GvSV(gv)); |
1107 | SvREFCNT_dec(sv); |
93a17b20 |
1108 | } |
1109 | break; |
cc4c2da6 |
1110 | case '\026': /* $^V */ |
1111 | { |
35a4481c |
1112 | SV * const sv = GvSV(gv); |
f9be5ac8 |
1113 | GvSV(gv) = new_version(PL_patchlevel); |
1114 | SvREADONLY_on(GvSV(gv)); |
1115 | SvREFCNT_dec(sv); |
16070b82 |
1116 | } |
1117 | break; |
cc4c2da6 |
1118 | } |
79072805 |
1119 | } |
93a17b20 |
1120 | return gv; |
79072805 |
1121 | } |
1122 | |
1123 | void |
35a4481c |
1124 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1125 | { |
35a4481c |
1126 | const char *name; |
7423f6db |
1127 | STRLEN namelen; |
35a4481c |
1128 | const HV * const hv = GvSTASH(gv); |
43693395 |
1129 | if (!hv) { |
0c34ef67 |
1130 | SvOK_off(sv); |
43693395 |
1131 | return; |
1132 | } |
1133 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 |
1134 | |
bfcb3514 |
1135 | name = HvNAME_get(hv); |
7423f6db |
1136 | if (name) { |
1137 | namelen = HvNAMELEN_get(hv); |
1138 | } else { |
e27ad1f2 |
1139 | name = "__ANON__"; |
7423f6db |
1140 | namelen = 8; |
1141 | } |
a0288114 |
1142 | |
e27ad1f2 |
1143 | if (keepmain || strNE(name, "main")) { |
7423f6db |
1144 | sv_catpvn(sv,name,namelen); |
6a7a3232 |
1145 | sv_catpvn(sv,"::", 2); |
43693395 |
1146 | } |
257984c0 |
1147 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 |
1148 | } |
1149 | |
1150 | void |
35a4481c |
1151 | Perl_gv_fullname3(pTHX_ SV *sv, const GV *gv, const char *prefix) |
79072805 |
1152 | { |
84e79d79 |
1153 | gv_fullname4(sv, gv, prefix, TRUE); |
79072805 |
1154 | } |
1155 | |
1156 | void |
35a4481c |
1157 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1158 | { |
35a4481c |
1159 | const GV *egv = GvEGV(gv); |
43693395 |
1160 | if (!egv) |
1161 | egv = gv; |
1162 | gv_fullname4(sv, egv, prefix, keepmain); |
1163 | } |
1164 | |
1165 | void |
35a4481c |
1166 | Perl_gv_efullname3(pTHX_ SV *sv, const GV *gv, const char *prefix) |
79072805 |
1167 | { |
84e79d79 |
1168 | gv_efullname4(sv, gv, prefix, TRUE); |
f6aff53a |
1169 | } |
1170 | |
35a4481c |
1171 | /* compatibility with versions <= 5.003. */ |
f6aff53a |
1172 | void |
35a4481c |
1173 | Perl_gv_fullname(pTHX_ SV *sv, const GV *gv) |
f6aff53a |
1174 | { |
35a4481c |
1175 | gv_fullname3(sv, gv, sv == (const SV*)gv ? "*" : ""); |
f6aff53a |
1176 | } |
1177 | |
35a4481c |
1178 | /* compatibility with versions <= 5.003. */ |
f6aff53a |
1179 | void |
35a4481c |
1180 | Perl_gv_efullname(pTHX_ SV *sv, const GV *gv) |
f6aff53a |
1181 | { |
e1ec3a88 |
1182 | gv_efullname3(sv, gv, sv == (const SV*)gv ? "*" : ""); |
79072805 |
1183 | } |
1184 | |
1185 | IO * |
864dbfa3 |
1186 | Perl_newIO(pTHX) |
79072805 |
1187 | { |
8990e307 |
1188 | GV *iogv; |
b7787f18 |
1189 | IO * const io = (IO*)NEWSV(0,0); |
8990e307 |
1190 | |
a0d0e21e |
1191 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
1192 | SvREFCNT(io) = 1; |
1193 | SvOBJECT_on(io); |
b464bac0 |
1194 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 |
1195 | hv_clear(PL_stashcache); |
c9de509e |
1196 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d |
1197 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1198 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
c9de509e |
1199 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
b162af07 |
1200 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 |
1201 | return io; |
1202 | } |
1203 | |
1204 | void |
864dbfa3 |
1205 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1206 | { |
79072805 |
1207 | register I32 i; |
463ee0b2 |
1208 | |
8990e307 |
1209 | if (!HvARRAY(stash)) |
1210 | return; |
a0d0e21e |
1211 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 |
1212 | const HE *entry; |
dc437b57 |
1213 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 |
1214 | register GV *gv; |
1215 | HV *hv; |
dc437b57 |
1216 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f |
1217 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e |
1218 | { |
19b6c847 |
1219 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1220 | gv_check(hv); /* nested package */ |
1221 | } |
dc437b57 |
1222 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 |
1223 | const char *file; |
dc437b57 |
1224 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1225 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1226 | continue; |
1d7c1841 |
1227 | file = GvFILE(gv); |
1228 | /* performance hack: if filename is absolute and it's a standard |
1229 | * module, don't bother warning */ |
1230 | if (file |
1231 | && PERL_FILE_IS_ABSOLUTE(file) |
6eb630b7 |
1232 | #ifdef MACOS_TRADITIONAL |
1233 | && (instr(file, ":lib:") |
1234 | #else |
1235 | && (instr(file, "/lib/") |
1236 | #endif |
1237 | || instr(file, ".pm"))) |
1d7c1841 |
1238 | { |
8990e307 |
1239 | continue; |
1d7c1841 |
1240 | } |
1241 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1242 | #ifdef USE_ITHREADS |
dd374669 |
1243 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 |
1244 | #else |
1245 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1246 | #endif |
9014280d |
1247 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 |
1248 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 |
1249 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 |
1250 | } |
79072805 |
1251 | } |
1252 | } |
1253 | } |
1254 | |
1255 | GV * |
e1ec3a88 |
1256 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 |
1257 | { |
cea2e8a9 |
1258 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1259 | TRUE, SVt_PVGV); |
79072805 |
1260 | } |
1261 | |
1262 | /* hopefully this is only called on local symbol table entries */ |
1263 | |
1264 | GP* |
864dbfa3 |
1265 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1266 | { |
1d7c1841 |
1267 | if (!gp) |
1268 | return (GP*)NULL; |
79072805 |
1269 | gp->gp_refcnt++; |
44a8e56a |
1270 | if (gp->gp_cv) { |
1271 | if (gp->gp_cvgen) { |
1272 | /* multi-named GPs cannot be used for method cache */ |
1273 | SvREFCNT_dec(gp->gp_cv); |
1274 | gp->gp_cv = Nullcv; |
1275 | gp->gp_cvgen = 0; |
1276 | } |
1277 | else { |
1278 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1279 | PL_sub_generation++; |
44a8e56a |
1280 | } |
1281 | } |
79072805 |
1282 | return gp; |
79072805 |
1283 | } |
1284 | |
1285 | void |
864dbfa3 |
1286 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1287 | { |
79072805 |
1288 | GP* gp; |
1289 | |
1290 | if (!gv || !(gp = GvGP(gv))) |
1291 | return; |
f248d071 |
1292 | if (gp->gp_refcnt == 0) { |
1293 | if (ckWARN_d(WARN_INTERNAL)) |
9014280d |
1294 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc |
1295 | "Attempt to free unreferenced glob pointers" |
1296 | pTHX__FORMAT pTHX__VALUE); |
79072805 |
1297 | return; |
1298 | } |
44a8e56a |
1299 | if (gp->gp_cv) { |
1300 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1301 | PL_sub_generation++; |
44a8e56a |
1302 | } |
748a9306 |
1303 | if (--gp->gp_refcnt > 0) { |
1304 | if (gp->gp_egv == gv) |
1305 | gp->gp_egv = 0; |
79072805 |
1306 | return; |
748a9306 |
1307 | } |
79072805 |
1308 | |
13207a71 |
1309 | if (gp->gp_sv) SvREFCNT_dec(gp->gp_sv); |
8926f269 |
1310 | if (gp->gp_av) SvREFCNT_dec(gp->gp_av); |
bfcb3514 |
1311 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1312 | Somehow gp->gp_hv can end up pointing at freed garbage. */ |
1313 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { |
bfcb3514 |
1314 | const char *hvname = HvNAME_get(gp->gp_hv); |
1315 | if (PL_stashcache && hvname) |
7423f6db |
1316 | hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
1317 | G_DISCARD); |
bfcb3514 |
1318 | SvREFCNT_dec(gp->gp_hv); |
13207a71 |
1319 | } |
1320 | if (gp->gp_io) SvREFCNT_dec(gp->gp_io); |
1321 | if (gp->gp_cv) SvREFCNT_dec(gp->gp_cv); |
1322 | if (gp->gp_form) SvREFCNT_dec(gp->gp_form); |
748a9306 |
1323 | |
79072805 |
1324 | Safefree(gp); |
1325 | GvGP(gv) = 0; |
1326 | } |
1327 | |
d460ef45 |
1328 | int |
1329 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1330 | { |
53c1dcc0 |
1331 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1332 | PERL_UNUSED_ARG(sv); |
dd374669 |
1333 | |
d460ef45 |
1334 | if (amtp && AMT_AMAGIC(amtp)) { |
1335 | int i; |
1336 | for (i = 1; i < NofAMmeth; i++) { |
53c1dcc0 |
1337 | CV * const cv = amtp->table[i]; |
d460ef45 |
1338 | if (cv != Nullcv) { |
1339 | SvREFCNT_dec((SV *) cv); |
1340 | amtp->table[i] = Nullcv; |
1341 | } |
1342 | } |
1343 | } |
1344 | return 0; |
1345 | } |
1346 | |
a0d0e21e |
1347 | /* Updates and caches the CV's */ |
1348 | |
1349 | bool |
864dbfa3 |
1350 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1351 | { |
53c1dcc0 |
1352 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
1353 | AMT * const amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1354 | AMT amt; |
a0d0e21e |
1355 | |
3280af22 |
1356 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1357 | && amtp->was_ok_sub == PL_sub_generation) |
eb160463 |
1358 | return (bool)AMT_OVERLOADED(amtp); |
14befaf4 |
1359 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e |
1360 | |
bfcb3514 |
1361 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e |
1362 | |
d460ef45 |
1363 | Zero(&amt,1,AMT); |
3280af22 |
1364 | amt.was_ok_am = PL_amagic_generation; |
1365 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1366 | amt.fallback = AMGfallNO; |
1367 | amt.flags = 0; |
1368 | |
a6006777 |
1369 | { |
32251b26 |
1370 | int filled = 0, have_ovl = 0; |
1371 | int i, lim = 1; |
a6006777 |
1372 | |
22c35a8c |
1373 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1374 | |
89ffc314 |
1375 | /* Try to find via inheritance. */ |
53c1dcc0 |
1376 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1377 | SV * const sv = gv ? GvSV(gv) : NULL; |
1378 | CV* cv; |
89ffc314 |
1379 | |
1380 | if (!gv) |
32251b26 |
1381 | lim = DESTROY_amg; /* Skip overloading entries. */ |
89ffc314 |
1382 | else if (SvTRUE(sv)) |
1383 | amt.fallback=AMGfallYES; |
1384 | else if (SvOK(sv)) |
1385 | amt.fallback=AMGfallNEVER; |
a6006777 |
1386 | |
32251b26 |
1387 | for (i = 1; i < lim; i++) |
1388 | amt.table[i] = Nullcv; |
1389 | for (; i < NofAMmeth; i++) { |
e1ec3a88 |
1390 | const char *cooky = PL_AMG_names[i]; |
32251b26 |
1391 | /* Human-readable form, for debugging: */ |
e1ec3a88 |
1392 | const char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
1393 | const STRLEN l = strlen(cooky); |
89ffc314 |
1394 | |
a0288114 |
1395 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1396 | cp, HvNAME_get(stash)) ); |
611c1e95 |
1397 | /* don't fill the cache while looking up! |
1398 | Creation of inheritance stubs in intermediate packages may |
1399 | conflict with the logic of runtime method substitution. |
1400 | Indeed, for inheritance A -> B -> C, if C overloads "+0", |
1401 | then we could have created stubs for "(+0" in A and C too. |
1402 | But if B overloads "bool", we may want to use it for |
1403 | numifying instead of C's "+0". */ |
1404 | if (i >= DESTROY_amg) |
1405 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); |
1406 | else /* Autoload taken care of below */ |
1407 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); |
46fc3d4c |
1408 | cv = 0; |
89ffc314 |
1409 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 |
1410 | const char *hvname; |
44a8e56a |
1411 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 |
1412 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 |
1413 | /* This is a hack to support autoloading..., while |
1414 | knowing *which* methods were declared as overloaded. */ |
44a8e56a |
1415 | /* GvSV contains the name of the method. */ |
4ea42e7f |
1416 | GV *ngv = Nullgv; |
a0288114 |
1417 | |
1418 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ |
1419 | "\" for overloaded \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1420 | GvSV(gv), cp, hvname) ); |
b267980d |
1421 | if (!SvPOK(GvSV(gv)) |
b15aece3 |
1422 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(GvSV(gv)), |
dc848c6f |
1423 | FALSE))) |
1424 | { |
a0288114 |
1425 | /* Can be an import stub (created by "can"). */ |
35c1215d |
1426 | SV *gvsv = GvSV(gv); |
b464bac0 |
1427 | const char * const name = SvPOK(gvsv) ? SvPVX_const(gvsv) : "???"; |
a0288114 |
1428 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1429 | "in package \"%.256s\"", |
35c1215d |
1430 | (GvCVGEN(gv) ? "Stub found while resolving" |
1431 | : "Can't resolve"), |
bfcb3514 |
1432 | name, cp, hvname); |
44a8e56a |
1433 | } |
dc848c6f |
1434 | cv = GvCV(gv = ngv); |
44a8e56a |
1435 | } |
b464bac0 |
1436 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 |
1437 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a |
1438 | GvNAME(CvGV(cv))) ); |
1439 | filled = 1; |
32251b26 |
1440 | if (i < DESTROY_amg) |
1441 | have_ovl = 1; |
611c1e95 |
1442 | } else if (gv) { /* Autoloaded... */ |
1443 | cv = (CV*)gv; |
1444 | filled = 1; |
44a8e56a |
1445 | } |
a6006777 |
1446 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1447 | } |
a0d0e21e |
1448 | if (filled) { |
a6006777 |
1449 | AMT_AMAGIC_on(&amt); |
32251b26 |
1450 | if (have_ovl) |
1451 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1452 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1453 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1454 | return have_ovl; |
a0d0e21e |
1455 | } |
1456 | } |
a6006777 |
1457 | /* Here we have no table: */ |
9cbac4c7 |
1458 | /* no_table: */ |
a6006777 |
1459 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1460 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1461 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1462 | return FALSE; |
1463 | } |
1464 | |
32251b26 |
1465 | |
1466 | CV* |
1467 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1468 | { |
3f8f4626 |
1469 | MAGIC *mg; |
32251b26 |
1470 | AMT *amtp; |
1471 | |
bfcb3514 |
1472 | if (!stash || !HvNAME_get(stash)) |
3f8f4626 |
1473 | return Nullcv; |
14befaf4 |
1474 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1475 | if (!mg) { |
1476 | do_update: |
1477 | Gv_AMupdate(stash); |
14befaf4 |
1478 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1479 | } |
1480 | amtp = (AMT*)mg->mg_ptr; |
1481 | if ( amtp->was_ok_am != PL_amagic_generation |
1482 | || amtp->was_ok_sub != PL_sub_generation ) |
1483 | goto do_update; |
3ad83ce7 |
1484 | if (AMT_AMAGIC(amtp)) { |
b7787f18 |
1485 | CV * const ret = amtp->table[id]; |
3ad83ce7 |
1486 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1487 | /* Passing it through may have resulted in a warning |
1488 | "Inherited AUTOLOAD for a non-method deprecated", since |
1489 | our caller is going through a function call, not a method call. |
1490 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ |
e1ec3a88 |
1491 | GV *gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 |
1492 | |
1493 | if (gv && GvCV(gv)) |
1494 | return GvCV(gv); |
1495 | } |
1496 | return ret; |
1497 | } |
a0288114 |
1498 | |
32251b26 |
1499 | return Nullcv; |
1500 | } |
1501 | |
1502 | |
a0d0e21e |
1503 | SV* |
864dbfa3 |
1504 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1505 | { |
27da23d5 |
1506 | dVAR; |
b267980d |
1507 | MAGIC *mg; |
9c5ffd7c |
1508 | CV *cv=NULL; |
a0d0e21e |
1509 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1510 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 |
1511 | int off = 0, off1, lr = 0, notfound = 0; |
1512 | int postpr = 0, force_cpy = 0; |
1513 | int assign = AMGf_assign & flags; |
1514 | const int assignshift = assign ? 1 : 0; |
497b47a8 |
1515 | #ifdef DEBUGGING |
1516 | int fl=0; |
497b47a8 |
1517 | #endif |
25716404 |
1518 | HV* stash=NULL; |
a0d0e21e |
1519 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 |
1520 | && (stash = SvSTASH(SvRV(left))) |
1521 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1522 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1523 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1524 | : (CV **) NULL)) |
b267980d |
1525 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1526 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1527 | * usual method */ |
497b47a8 |
1528 | ( |
1529 | #ifdef DEBUGGING |
1530 | fl = 1, |
a0288114 |
1531 | #endif |
497b47a8 |
1532 | cv = cvp[off=method])))) { |
a0d0e21e |
1533 | lr = -1; /* Call method for left argument */ |
1534 | } else { |
1535 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1536 | int logic; |
1537 | |
1538 | /* look for substituted methods */ |
ee239bfe |
1539 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1540 | switch (method) { |
1541 | case inc_amg: |
ee239bfe |
1542 | force_cpy = 1; |
1543 | if ((cv = cvp[off=add_ass_amg]) |
1544 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1545 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1546 | } |
1547 | break; |
1548 | case dec_amg: |
ee239bfe |
1549 | force_cpy = 1; |
1550 | if ((cv = cvp[off = subtr_ass_amg]) |
1551 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1552 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1553 | } |
1554 | break; |
1555 | case bool__amg: |
1556 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1557 | break; |
1558 | case numer_amg: |
1559 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1560 | break; |
1561 | case string_amg: |
1562 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1563 | break; |
b7787f18 |
1564 | case not_amg: |
1565 | (void)((cv = cvp[off=bool__amg]) |
1566 | || (cv = cvp[off=numer_amg]) |
1567 | || (cv = cvp[off=string_amg])); |
1568 | postpr = 1; |
1569 | break; |
748a9306 |
1570 | case copy_amg: |
1571 | { |
76e3520e |
1572 | /* |
1573 | * SV* ref causes confusion with the interpreter variable of |
1574 | * the same name |
1575 | */ |
1576 | SV* tmpRef=SvRV(left); |
1577 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1578 | /* |
1579 | * Just to be extra cautious. Maybe in some |
1580 | * additional cases sv_setsv is safe, too. |
1581 | */ |
76e3520e |
1582 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1583 | SvOBJECT_on(newref); |
b162af07 |
1584 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 |
1585 | return newref; |
1586 | } |
1587 | } |
1588 | break; |
a0d0e21e |
1589 | case abs_amg: |
b267980d |
1590 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1591 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1592 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1593 | if (off1==lt_amg) { |
748a9306 |
1594 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1595 | lt_amg,AMGf_noright); |
1596 | logic = SvTRUE(lessp); |
1597 | } else { |
748a9306 |
1598 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1599 | ncmp_amg,AMGf_noright); |
1600 | logic = (SvNV(lessp) < 0); |
1601 | } |
1602 | if (logic) { |
1603 | if (off==subtr_amg) { |
1604 | right = left; |
748a9306 |
1605 | left = nullsv; |
a0d0e21e |
1606 | lr = 1; |
1607 | } |
1608 | } else { |
1609 | return left; |
1610 | } |
1611 | } |
1612 | break; |
1613 | case neg_amg: |
155aba94 |
1614 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1615 | right = left; |
1616 | left = sv_2mortal(newSViv(0)); |
1617 | lr = 1; |
1618 | } |
1619 | break; |
f216259d |
1620 | case int_amg: |
f5284f61 |
1621 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1622 | /* FAIL safe */ |
1623 | return NULL; /* Delegate operation to standard mechanisms. */ |
1624 | break; |
f5284f61 |
1625 | case to_sv_amg: |
1626 | case to_av_amg: |
1627 | case to_hv_amg: |
1628 | case to_gv_amg: |
1629 | case to_cv_amg: |
1630 | /* FAIL safe */ |
b267980d |
1631 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1632 | break; |
a0d0e21e |
1633 | default: |
1634 | goto not_found; |
1635 | } |
1636 | if (!cv) goto not_found; |
1637 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
25716404 |
1638 | && (stash = SvSTASH(SvRV(right))) |
1639 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1640 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1641 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1642 | : (CV **) NULL)) |
a0d0e21e |
1643 | && (cv = cvp[off=method])) { /* Method for right |
1644 | * argument found */ |
1645 | lr=1; |
b267980d |
1646 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1647 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1648 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1649 | && !(flags & AMGf_unary)) { |
1650 | /* We look for substitution for |
1651 | * comparison operations and |
fc36a67e |
1652 | * concatenation */ |
a0d0e21e |
1653 | if (method==concat_amg || method==concat_ass_amg |
1654 | || method==repeat_amg || method==repeat_ass_amg) { |
1655 | return NULL; /* Delegate operation to string conversion */ |
1656 | } |
1657 | off = -1; |
1658 | switch (method) { |
1659 | case lt_amg: |
1660 | case le_amg: |
1661 | case gt_amg: |
1662 | case ge_amg: |
1663 | case eq_amg: |
1664 | case ne_amg: |
1665 | postpr = 1; off=ncmp_amg; break; |
1666 | case slt_amg: |
1667 | case sle_amg: |
1668 | case sgt_amg: |
1669 | case sge_amg: |
1670 | case seq_amg: |
1671 | case sne_amg: |
1672 | postpr = 1; off=scmp_amg; break; |
1673 | } |
1674 | if (off != -1) cv = cvp[off]; |
1675 | if (!cv) { |
1676 | goto not_found; |
1677 | } |
1678 | } else { |
a6006777 |
1679 | not_found: /* No method found, either report or croak */ |
b267980d |
1680 | switch (method) { |
1681 | case to_sv_amg: |
1682 | case to_av_amg: |
1683 | case to_hv_amg: |
1684 | case to_gv_amg: |
1685 | case to_cv_amg: |
1686 | /* FAIL safe */ |
1687 | return left; /* Delegate operation to standard mechanisms. */ |
1688 | break; |
1689 | } |
a0d0e21e |
1690 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1691 | notfound = 1; lr = -1; |
1692 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1693 | notfound = 1; lr = 1; |
1694 | } else { |
46fc3d4c |
1695 | SV *msg; |
774d564b |
1696 | if (off==-1) off=method; |
b267980d |
1697 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 |
1698 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 |
1699 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1700 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1701 | SvAMAGIC(left)? |
a0d0e21e |
1702 | "in overloaded package ": |
1703 | "has no overloaded magic", |
b267980d |
1704 | SvAMAGIC(left)? |
bfcb3514 |
1705 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e |
1706 | "", |
b267980d |
1707 | SvAMAGIC(right)? |
e7ea3e70 |
1708 | ",\n\tright argument in overloaded package ": |
b267980d |
1709 | (flags & AMGf_unary |
e7ea3e70 |
1710 | ? "" |
1711 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1712 | SvAMAGIC(right)? |
bfcb3514 |
1713 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c |
1714 | "")); |
a0d0e21e |
1715 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 |
1716 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e |
1717 | } else { |
894356b3 |
1718 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1719 | } |
1720 | return NULL; |
1721 | } |
ee239bfe |
1722 | force_cpy = force_cpy || assign; |
a0d0e21e |
1723 | } |
1724 | } |
497b47a8 |
1725 | #ifdef DEBUGGING |
a0d0e21e |
1726 | if (!notfound) { |
497b47a8 |
1727 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 |
1728 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 |
1729 | AMG_id2name(off), |
1730 | method+assignshift==off? "" : |
a0288114 |
1731 | " (initially \"", |
497b47a8 |
1732 | method+assignshift==off? "" : |
1733 | AMG_id2name(method+assignshift), |
a0288114 |
1734 | method+assignshift==off? "" : "\")", |
497b47a8 |
1735 | flags & AMGf_unary? "" : |
1736 | lr==1 ? " for right argument": " for left argument", |
1737 | flags & AMGf_unary? " for argument" : "", |
bfcb3514 |
1738 | stash ? HvNAME_get(stash) : "null", |
497b47a8 |
1739 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1740 | } |
497b47a8 |
1741 | #endif |
748a9306 |
1742 | /* Since we use shallow copy during assignment, we need |
1743 | * to dublicate the contents, probably calling user-supplied |
1744 | * version of copy operator |
1745 | */ |
ee239bfe |
1746 | /* We need to copy in following cases: |
1747 | * a) Assignment form was called. |
1748 | * assignshift==1, assign==T, method + 1 == off |
1749 | * b) Increment or decrement, called directly. |
1750 | * assignshift==0, assign==0, method + 0 == off |
1751 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1752 | * assignshift==0, assign==T, |
ee239bfe |
1753 | * force_cpy == T |
1754 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1755 | * assignshift==0, assign==0, |
ee239bfe |
1756 | * force_cpy == T |
1757 | * e) Assignment form translated to nomethod. |
1758 | * assignshift==1, assign==T, method + 1 != off |
1759 | * force_cpy == T |
1760 | */ |
1761 | /* off is method, method+assignshift, or a result of opcode substitution. |
1762 | * In the latter case assignshift==0, so only notfound case is important. |
1763 | */ |
1764 | if (( (method + assignshift == off) |
1765 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1766 | || force_cpy) |
1767 | RvDEEPCP(left); |
a0d0e21e |
1768 | { |
1769 | dSP; |
1770 | BINOP myop; |
1771 | SV* res; |
b7787f18 |
1772 | const bool oldcatch = CATCH_GET; |
a0d0e21e |
1773 | |
54310121 |
1774 | CATCH_SET(TRUE); |
a0d0e21e |
1775 | Zero(&myop, 1, BINOP); |
1776 | myop.op_last = (OP *) &myop; |
1777 | myop.op_next = Nullop; |
54310121 |
1778 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1779 | |
e788e7d3 |
1780 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1781 | ENTER; |
462e5cf6 |
1782 | SAVEOP(); |
533c011a |
1783 | PL_op = (OP *) &myop; |
3280af22 |
1784 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1785 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1786 | PUTBACK; |
cea2e8a9 |
1787 | pp_pushmark(); |
a0d0e21e |
1788 | |
924508f0 |
1789 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1790 | PUSHs(lr>0? right: left); |
1791 | PUSHs(lr>0? left: right); |
3280af22 |
1792 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1793 | if (notfound) { |
89ffc314 |
1794 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1795 | } |
1796 | PUSHs((SV*)cv); |
1797 | PUTBACK; |
1798 | |
155aba94 |
1799 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1800 | CALLRUNOPS(aTHX); |
a0d0e21e |
1801 | LEAVE; |
1802 | SPAGAIN; |
1803 | |
1804 | res=POPs; |
ebafeae7 |
1805 | PUTBACK; |
d3acc0f7 |
1806 | POPSTACK; |
54310121 |
1807 | CATCH_SET(oldcatch); |
a0d0e21e |
1808 | |
a0d0e21e |
1809 | if (postpr) { |
b7787f18 |
1810 | int ans; |
a0d0e21e |
1811 | switch (method) { |
1812 | case le_amg: |
1813 | case sle_amg: |
1814 | ans=SvIV(res)<=0; break; |
1815 | case lt_amg: |
1816 | case slt_amg: |
1817 | ans=SvIV(res)<0; break; |
1818 | case ge_amg: |
1819 | case sge_amg: |
1820 | ans=SvIV(res)>=0; break; |
1821 | case gt_amg: |
1822 | case sgt_amg: |
1823 | ans=SvIV(res)>0; break; |
1824 | case eq_amg: |
1825 | case seq_amg: |
1826 | ans=SvIV(res)==0; break; |
1827 | case ne_amg: |
1828 | case sne_amg: |
1829 | ans=SvIV(res)!=0; break; |
1830 | case inc_amg: |
1831 | case dec_amg: |
bbce6d69 |
1832 | SvSetSV(left,res); return left; |
dc437b57 |
1833 | case not_amg: |
fe7ac86a |
1834 | ans=!SvTRUE(res); break; |
b7787f18 |
1835 | default: |
1836 | ans=0; break; |
a0d0e21e |
1837 | } |
54310121 |
1838 | return boolSV(ans); |
748a9306 |
1839 | } else if (method==copy_amg) { |
1840 | if (!SvROK(res)) { |
cea2e8a9 |
1841 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1842 | } |
1843 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1844 | } else { |
1845 | return res; |
1846 | } |
1847 | } |
1848 | } |
c9d5ac95 |
1849 | |
1850 | /* |
7fc63493 |
1851 | =for apidoc is_gv_magical_sv |
c9d5ac95 |
1852 | |
7a5fd60d |
1853 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
1854 | |
1855 | =cut |
1856 | */ |
1857 | |
1858 | bool |
1859 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) |
1860 | { |
1861 | STRLEN len; |
e62f0680 |
1862 | const char *temp = SvPV_const(name, len); |
7a5fd60d |
1863 | return is_gv_magical(temp, len, flags); |
1864 | } |
1865 | |
1866 | /* |
1867 | =for apidoc is_gv_magical |
1868 | |
c9d5ac95 |
1869 | Returns C<TRUE> if given the name of a magical GV. |
1870 | |
1871 | Currently only useful internally when determining if a GV should be |
1872 | created even in rvalue contexts. |
1873 | |
1874 | C<flags> is not used at present but available for future extension to |
1875 | allow selecting particular classes of magical variable. |
1876 | |
b9b0e72c |
1877 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
1878 | This assumption is met by all callers within the perl core, which all pass |
1879 | pointers returned by SvPV. |
1880 | |
c9d5ac95 |
1881 | =cut |
1882 | */ |
1883 | bool |
7fc63493 |
1884 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 |
1885 | { |
9d4ba2ae |
1886 | PERL_UNUSED_ARG(flags); |
1887 | |
b9b0e72c |
1888 | if (len > 1) { |
b464bac0 |
1889 | const char * const name1 = name + 1; |
b9b0e72c |
1890 | switch (*name) { |
1891 | case 'I': |
9431620d |
1892 | if (len == 3 && name1[1] == 'S' && name[2] == 'A') |
b9b0e72c |
1893 | goto yes; |
1894 | break; |
1895 | case 'O': |
9431620d |
1896 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c |
1897 | goto yes; |
1898 | break; |
1899 | case 'S': |
9431620d |
1900 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c |
1901 | goto yes; |
1902 | break; |
1903 | /* Using ${^...} variables is likely to be sufficiently rare that |
1904 | it seems sensible to avoid the space hit of also checking the |
1905 | length. */ |
1906 | case '\017': /* ${^OPEN} */ |
9431620d |
1907 | if (strEQ(name1, "PEN")) |
b9b0e72c |
1908 | goto yes; |
1909 | break; |
1910 | case '\024': /* ${^TAINT} */ |
9431620d |
1911 | if (strEQ(name1, "AINT")) |
b9b0e72c |
1912 | goto yes; |
1913 | break; |
1914 | case '\025': /* ${^UNICODE} */ |
9431620d |
1915 | if (strEQ(name1, "NICODE")) |
b9b0e72c |
1916 | goto yes; |
a0288114 |
1917 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 |
1918 | goto yes; |
b9b0e72c |
1919 | break; |
1920 | case '\027': /* ${^WARNING_BITS} */ |
9431620d |
1921 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c |
1922 | goto yes; |
1923 | break; |
1924 | case '1': |
1925 | case '2': |
1926 | case '3': |
1927 | case '4': |
1928 | case '5': |
1929 | case '6': |
1930 | case '7': |
1931 | case '8': |
1932 | case '9': |
c9d5ac95 |
1933 | { |
7fc63493 |
1934 | const char *end = name + len; |
c9d5ac95 |
1935 | while (--end > name) { |
1936 | if (!isDIGIT(*end)) |
1937 | return FALSE; |
1938 | } |
b9b0e72c |
1939 | goto yes; |
1940 | } |
1941 | } |
1942 | } else { |
1943 | /* Because we're already assuming that name is NUL terminated |
1944 | below, we can treat an empty name as "\0" */ |
1945 | switch (*name) { |
1946 | case '&': |
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 '\001': /* $^A */ |
1972 | case '\003': /* $^C */ |
1973 | case '\004': /* $^D */ |
1974 | case '\005': /* $^E */ |
1975 | case '\006': /* $^F */ |
1976 | case '\010': /* $^H */ |
1977 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1978 | case '\014': /* $^L */ |
1979 | case '\016': /* $^N */ |
1980 | case '\017': /* $^O */ |
1981 | case '\020': /* $^P */ |
1982 | case '\023': /* $^S */ |
1983 | case '\024': /* $^T */ |
1984 | case '\026': /* $^V */ |
1985 | case '\027': /* $^W */ |
1986 | case '1': |
1987 | case '2': |
1988 | case '3': |
1989 | case '4': |
1990 | case '5': |
1991 | case '6': |
1992 | case '7': |
1993 | case '8': |
1994 | case '9': |
1995 | yes: |
1996 | return TRUE; |
1997 | default: |
1998 | break; |
c9d5ac95 |
1999 | } |
c9d5ac95 |
2000 | } |
2001 | return FALSE; |
2002 | } |
66610fdd |
2003 | |
2004 | /* |
2005 | * Local variables: |
2006 | * c-indentation-style: bsd |
2007 | * c-basic-offset: 4 |
2008 | * indent-tabs-mode: t |
2009 | * End: |
2010 | * |
37442d52 |
2011 | * ex: set ts=8 sts=4 sw=4 noet: |
2012 | */ |