Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
be3c0a43 |
3 | * Copyright (c) 1991-2002, Larry Wall |
79072805 |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
7 | * |
a0d0e21e |
8 | */ |
9 | |
10 | /* |
11 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure |
12 | * of your inquisitiveness, I shall spend all the rest of my days answering |
13 | * you. What more do you want to know?' |
14 | * 'The names of all the stars, and of all living things, and the whole |
15 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' |
16 | * laughed Pippin. |
79072805 |
17 | */ |
18 | |
ccfc67b7 |
19 | /* |
20 | =head1 GV Functions |
21 | */ |
22 | |
79072805 |
23 | #include "EXTERN.h" |
864dbfa3 |
24 | #define PERL_IN_GV_C |
79072805 |
25 | #include "perl.h" |
26 | |
27 | GV * |
864dbfa3 |
28 | Perl_gv_AVadd(pTHX_ register GV *gv) |
79072805 |
29 | { |
a0d0e21e |
30 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
31 | Perl_croak(aTHX_ "Bad symbol for array"); |
79072805 |
32 | if (!GvAV(gv)) |
33 | GvAV(gv) = newAV(); |
34 | return gv; |
35 | } |
36 | |
37 | GV * |
864dbfa3 |
38 | Perl_gv_HVadd(pTHX_ register GV *gv) |
79072805 |
39 | { |
a0d0e21e |
40 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
41 | Perl_croak(aTHX_ "Bad symbol for hash"); |
79072805 |
42 | if (!GvHV(gv)) |
463ee0b2 |
43 | GvHV(gv) = newHV(); |
79072805 |
44 | return gv; |
45 | } |
46 | |
47 | GV * |
864dbfa3 |
48 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e |
49 | { |
50 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
51 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
5bd07a3d |
52 | if (!GvIOp(gv)) { |
7fb37951 |
53 | #ifdef GV_UNIQUE_CHECK |
54 | if (GvUNIQUE(gv)) { |
55 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); |
5bd07a3d |
56 | } |
57 | #endif |
a0d0e21e |
58 | GvIOp(gv) = newIO(); |
5bd07a3d |
59 | } |
a0d0e21e |
60 | return gv; |
61 | } |
62 | |
63 | GV * |
864dbfa3 |
64 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
65 | { |
eacec437 |
66 | char smallbuf[256]; |
53d95988 |
67 | char *tmpbuf; |
8ebc5c01 |
68 | STRLEN tmplen; |
79072805 |
69 | GV *gv; |
70 | |
1d7c1841 |
71 | if (!PL_defstash) |
72 | return Nullgv; |
73 | |
53d95988 |
74 | tmplen = strlen(name) + 2; |
75 | if (tmplen < sizeof smallbuf) |
76 | tmpbuf = smallbuf; |
77 | else |
78 | New(603, tmpbuf, tmplen + 1, char); |
0ac0412a |
79 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 |
80 | tmpbuf[0] = '_'; |
81 | tmpbuf[1] = '<'; |
82 | strcpy(tmpbuf + 2, name); |
3280af22 |
83 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
84 | if (!isGV(gv)) { |
3280af22 |
85 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
1d7c1841 |
86 | sv_setpv(GvSV(gv), name); |
87 | if (PERLDB_LINE) |
14befaf4 |
88 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile); |
1d7c1841 |
89 | } |
53d95988 |
90 | if (tmpbuf != smallbuf) |
91 | Safefree(tmpbuf); |
79072805 |
92 | return gv; |
93 | } |
94 | |
463ee0b2 |
95 | void |
864dbfa3 |
96 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
97 | { |
98 | register GP *gp; |
55d729e4 |
99 | bool doproto = SvTYPE(gv) > SVt_NULL; |
100 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
463ee0b2 |
101 | |
dc437b57 |
102 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
103 | if (SvLEN(gv)) { |
104 | if (proto) { |
105 | SvPVX(gv) = NULL; |
106 | SvLEN(gv) = 0; |
107 | SvPOK_off(gv); |
108 | } else |
109 | Safefree(SvPVX(gv)); |
110 | } |
44a8e56a |
111 | Newz(602, gp, 1, GP); |
8990e307 |
112 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
113 | GvSV(gv) = NEWSV(72,0); |
1d7c1841 |
114 | GvLINE(gv) = CopLINE(PL_curcop); |
115 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; |
005a453c |
116 | GvCVGEN(gv) = 0; |
463ee0b2 |
117 | GvEGV(gv) = gv; |
14befaf4 |
118 | sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0); |
85aff577 |
119 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e |
120 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
121 | GvNAMELEN(gv) = len; |
23ad5bf5 |
122 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
123 | GvMULTI_on(gv); |
55d729e4 |
124 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
125 | SvIOK_off(gv); |
55d729e4 |
126 | ENTER; |
b099ddc0 |
127 | /* XXX unsafe for threads if eval_owner isn't held */ |
55d729e4 |
128 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 |
129 | GvCV(gv) = PL_compcv; |
55d729e4 |
130 | LEAVE; |
131 | |
3280af22 |
132 | PL_sub_generation++; |
65c50114 |
133 | CvGV(GvCV(gv)) = gv; |
e0d088d0 |
134 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 |
135 | CvSTASH(GvCV(gv)) = PL_curstash; |
4d1ff10f |
136 | #ifdef USE_5005THREADS |
55d729e4 |
137 | CvOWNER(GvCV(gv)) = 0; |
1cfa4ec7 |
138 | if (!CvMUTEXP(GvCV(gv))) { |
b0a484d2 |
139 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
1cfa4ec7 |
140 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
141 | } |
4d1ff10f |
142 | #endif /* USE_5005THREADS */ |
55d729e4 |
143 | if (proto) { |
144 | sv_setpv((SV*)GvCV(gv), proto); |
145 | Safefree(proto); |
146 | } |
147 | } |
463ee0b2 |
148 | } |
149 | |
76e3520e |
150 | STATIC void |
cea2e8a9 |
151 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
152 | { |
153 | switch (sv_type) { |
154 | case SVt_PVIO: |
155 | (void)GvIOn(gv); |
156 | break; |
157 | case SVt_PVAV: |
158 | (void)GvAVn(gv); |
159 | break; |
160 | case SVt_PVHV: |
161 | (void)GvHVn(gv); |
162 | break; |
163 | } |
164 | } |
165 | |
954c1994 |
166 | /* |
167 | =for apidoc gv_fetchmeth |
168 | |
169 | Returns the glob with the given C<name> and a defined subroutine or |
170 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
171 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
172 | |
173 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
174 | side-effect creates a glob with the given C<name> in the given C<stash> |
175 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
176 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
177 | |
178 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
179 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
180 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
181 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
182 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
183 | |
184 | =cut |
185 | */ |
186 | |
79072805 |
187 | GV * |
864dbfa3 |
188 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
189 | { |
190 | AV* av; |
463ee0b2 |
191 | GV* topgv; |
79072805 |
192 | GV* gv; |
463ee0b2 |
193 | GV** gvp; |
748a9306 |
194 | CV* cv; |
a0d0e21e |
195 | |
af09ea45 |
196 | /* UNIVERSAL methods should be callable without a stash */ |
197 | if (!stash) { |
198 | level = -1; /* probably appropriate */ |
199 | if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE))) |
200 | return 0; |
201 | } |
202 | |
44a8e56a |
203 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
204 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
3e0ccd42 |
205 | name, HvNAME(stash)); |
463ee0b2 |
206 | |
cea2e8a9 |
207 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
208 | |
209 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
210 | if (!gvp) |
211 | topgv = Nullgv; |
212 | else { |
213 | topgv = *gvp; |
214 | if (SvTYPE(topgv) != SVt_PVGV) |
215 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
216 | if ((cv = GvCV(topgv))) { |
44a8e56a |
217 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
218 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
219 | return topgv; |
44a8e56a |
220 | /* Stale cached entry: junk it */ |
221 | SvREFCNT_dec(cv); |
222 | GvCV(topgv) = cv = Nullcv; |
223 | GvCVGEN(topgv) = 0; |
748a9306 |
224 | } |
3280af22 |
225 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
226 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
227 | } |
79072805 |
228 | |
9607fc9c |
229 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
230 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
231 | |
fb73857a |
232 | /* create and re-create @.*::SUPER::ISA on demand */ |
233 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
234 | char* packname = HvNAME(stash); |
235 | STRLEN packlen = strlen(packname); |
236 | |
237 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
238 | HV* basestash; |
239 | |
240 | packlen -= 7; |
241 | basestash = gv_stashpvn(packname, packlen, TRUE); |
242 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
243 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
9607fc9c |
244 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
245 | if (!gvp || !(gv = *gvp)) |
cea2e8a9 |
246 | Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); |
9607fc9c |
247 | if (SvTYPE(gv) != SVt_PVGV) |
248 | gv_init(gv, stash, "ISA", 3, TRUE); |
249 | SvREFCNT_dec(GvAV(gv)); |
250 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
251 | } |
252 | } |
253 | } |
254 | |
255 | if (av) { |
79072805 |
256 | SV** svp = AvARRAY(av); |
93965878 |
257 | /* NOTE: No support for tied ISA */ |
258 | I32 items = AvFILLp(av) + 1; |
79072805 |
259 | while (items--) { |
79072805 |
260 | SV* sv = *svp++; |
a0d0e21e |
261 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
262 | if (!basestash) { |
599cee73 |
263 | if (ckWARN(WARN_MISC)) |
9014280d |
264 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %s for @%s::ISA", |
463ee0b2 |
265 | SvPVX(sv), HvNAME(stash)); |
79072805 |
266 | continue; |
267 | } |
44a8e56a |
268 | gv = gv_fetchmeth(basestash, name, len, |
269 | (level >= 0) ? level + 1 : level - 1); |
270 | if (gv) |
271 | goto gotcha; |
79072805 |
272 | } |
273 | } |
a0d0e21e |
274 | |
9607fc9c |
275 | /* if at top level, try UNIVERSAL */ |
276 | |
44a8e56a |
277 | if (level == 0 || level == -1) { |
9607fc9c |
278 | HV* lastchance; |
279 | |
155aba94 |
280 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
281 | if ((gv = gv_fetchmeth(lastchance, name, len, |
282 | (level >= 0) ? level + 1 : level - 1))) |
283 | { |
44a8e56a |
284 | gotcha: |
dc848c6f |
285 | /* |
286 | * Cache method in topgv if: |
287 | * 1. topgv has no synonyms (else inheritance crosses wires) |
288 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
289 | */ |
290 | if (topgv && |
291 | GvREFCNT(topgv) == 1 && |
292 | (cv = GvCV(gv)) && |
293 | (CvROOT(cv) || CvXSUB(cv))) |
294 | { |
155aba94 |
295 | if ((cv = GvCV(topgv))) |
44a8e56a |
296 | SvREFCNT_dec(cv); |
297 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
298 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
299 | } |
a0d0e21e |
300 | return gv; |
301 | } |
005a453c |
302 | else if (topgv && GvREFCNT(topgv) == 1) { |
303 | /* cache the fact that the method is not defined */ |
3280af22 |
304 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
305 | } |
a0d0e21e |
306 | } |
307 | } |
308 | |
79072805 |
309 | return 0; |
310 | } |
311 | |
954c1994 |
312 | /* |
611c1e95 |
313 | =for apidoc gv_fetchmeth_autoload |
314 | |
315 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. |
316 | Returns a glob for the subroutine. |
317 | |
318 | For an autoloaded subroutine without a GV, will create a GV even |
319 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() |
320 | of the result may be zero. |
321 | |
322 | =cut |
323 | */ |
324 | |
325 | GV * |
326 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
327 | { |
328 | GV *gv = gv_fetchmeth(stash, name, len, level); |
329 | |
330 | if (!gv) { |
331 | char autoload[] = "AUTOLOAD"; |
332 | STRLEN autolen = sizeof(autoload)-1; |
333 | CV *cv; |
334 | GV **gvp; |
335 | |
336 | if (!stash) |
337 | return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
338 | if (len == autolen && strnEQ(name, autoload, autolen)) |
339 | return Nullgv; |
340 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
341 | return Nullgv; |
342 | cv = GvCV(gv); |
343 | if (!(CvROOT(cv) || CvXSUB(cv))) |
344 | return Nullgv; |
345 | /* Have an autoload */ |
346 | if (level < 0) /* Cannot do without a stub */ |
347 | gv_fetchmeth(stash, name, len, 0); |
348 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
349 | if (!gvp) |
350 | return Nullgv; |
351 | return *gvp; |
352 | } |
353 | return gv; |
354 | } |
355 | |
356 | /* |
954c1994 |
357 | =for apidoc gv_fetchmethod |
358 | |
6d0f518e |
359 | See L<gv_fetchmethod_autoload>. |
954c1994 |
360 | |
361 | =cut |
362 | */ |
363 | |
79072805 |
364 | GV * |
864dbfa3 |
365 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
463ee0b2 |
366 | { |
dc848c6f |
367 | return gv_fetchmethod_autoload(stash, name, TRUE); |
368 | } |
369 | |
954c1994 |
370 | /* |
371 | =for apidoc gv_fetchmethod_autoload |
372 | |
373 | Returns the glob which contains the subroutine to call to invoke the method |
374 | on the C<stash>. In fact in the presence of autoloading this may be the |
375 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
376 | already setup. |
954c1994 |
377 | |
378 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
379 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
380 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
381 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
382 | with a non-zero C<autoload> parameter. |
954c1994 |
383 | |
384 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
385 | that if you want to keep the returned glob for a long time, you need to |
386 | check for it being "AUTOLOAD", since at the later time the call may load a |
387 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
388 | created via a side effect to do this. |
954c1994 |
389 | |
390 | These functions have the same side-effects and as C<gv_fetchmeth> with |
391 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
392 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
393 | C<call_sv> apply equally to these functions. |
954c1994 |
394 | |
395 | =cut |
396 | */ |
397 | |
dc848c6f |
398 | GV * |
864dbfa3 |
399 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
400 | { |
08105a92 |
401 | register const char *nend; |
402 | const char *nsplit = 0; |
a0d0e21e |
403 | GV* gv; |
b267980d |
404 | |
463ee0b2 |
405 | for (nend = name; *nend; nend++) { |
9607fc9c |
406 | if (*nend == '\'') |
a0d0e21e |
407 | nsplit = nend; |
9607fc9c |
408 | else if (*nend == ':' && *(nend + 1) == ':') |
409 | nsplit = ++nend; |
a0d0e21e |
410 | } |
411 | if (nsplit) { |
08105a92 |
412 | const char *origname = name; |
a0d0e21e |
413 | name = nsplit + 1; |
a0d0e21e |
414 | if (*nsplit == ':') |
415 | --nsplit; |
9607fc9c |
416 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
417 | /* ->SUPER::method should really be looked up in original stash */ |
cea2e8a9 |
418 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
419 | CopSTASHPV(PL_curcop))); |
af09ea45 |
420 | /* __PACKAGE__::SUPER stash should be autovivified */ |
9607fc9c |
421 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
422 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
9607fc9c |
423 | origname, HvNAME(stash), name) ); |
4633a7c4 |
424 | } |
e189a56d |
425 | else { |
af09ea45 |
426 | /* don't autovifify if ->NoSuchStash::method */ |
427 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); |
e189a56d |
428 | |
429 | /* however, explicit calls to Pkg::SUPER::method may |
430 | happen, and may require autovivification to work */ |
431 | if (!stash && (nsplit - origname) >= 7 && |
432 | strnEQ(nsplit - 7, "::SUPER", 7) && |
433 | gv_stashpvn(origname, nsplit - origname - 7, FALSE)) |
434 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
435 | } |
4633a7c4 |
436 | } |
437 | |
9607fc9c |
438 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
439 | if (!gv) { |
2f6e0fe7 |
440 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
441 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
442 | else if (autoload) |
54310121 |
443 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
444 | } |
dc848c6f |
445 | else if (autoload) { |
446 | CV* cv = GvCV(gv); |
09280a33 |
447 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
448 | GV* stubgv; |
449 | GV* autogv; |
450 | |
451 | if (CvANON(cv)) |
452 | stubgv = gv; |
453 | else { |
454 | stubgv = CvGV(cv); |
455 | if (GvCV(stubgv) != cv) /* orphaned import */ |
456 | stubgv = gv; |
457 | } |
458 | autogv = gv_autoload4(GvSTASH(stubgv), |
459 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
460 | if (autogv) |
461 | gv = autogv; |
462 | } |
463 | } |
44a8e56a |
464 | |
465 | return gv; |
466 | } |
467 | |
468 | GV* |
864dbfa3 |
469 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
470 | { |
df3728a2 |
471 | char autoload[] = "AUTOLOAD"; |
472 | STRLEN autolen = sizeof(autoload)-1; |
44a8e56a |
473 | GV* gv; |
474 | CV* cv; |
475 | HV* varstash; |
476 | GV* vargv; |
477 | SV* varsv; |
478 | |
af09ea45 |
479 | if (!stash) |
480 | return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
44a8e56a |
481 | if (len == autolen && strnEQ(name, autoload, autolen)) |
482 | return Nullgv; |
dc848c6f |
483 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
484 | return Nullgv; |
485 | cv = GvCV(gv); |
486 | |
adb5a9ae |
487 | if (!(CvROOT(cv) || CvXSUB(cv))) |
ed850460 |
488 | return Nullgv; |
489 | |
dc848c6f |
490 | /* |
491 | * Inheriting AUTOLOAD for non-methods works ... for now. |
492 | */ |
12bcd1a6 |
493 | if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && !method && |
599cee73 |
494 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
12bcd1a6 |
495 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f |
496 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
497 | HvNAME(stash), (int)len, name); |
44a8e56a |
498 | |
4d1ff10f |
499 | #ifndef USE_5005THREADS |
adb5a9ae |
500 | if (CvXSUB(cv)) { |
501 | /* rather than lookup/init $AUTOLOAD here |
502 | * only to have the XSUB do another lookup for $AUTOLOAD |
503 | * and split that value on the last '::', |
504 | * pass along the same data via some unused fields in the CV |
505 | */ |
506 | CvSTASH(cv) = stash; |
0222aa7d |
507 | SvPVX(cv) = (char *)name; /* cast to lose constness warning */ |
adb5a9ae |
508 | SvCUR(cv) = len; |
509 | return gv; |
510 | } |
511 | #endif |
512 | |
44a8e56a |
513 | /* |
514 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
515 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
516 | * use that, but for lack of anything better we will use the sub's |
517 | * original package to look up $AUTOLOAD. |
518 | */ |
519 | varstash = GvSTASH(CvGV(cv)); |
520 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
3d35f11b |
521 | ENTER; |
522 | |
4d1ff10f |
523 | #ifdef USE_5005THREADS |
4755096e |
524 | sv_lock((SV *)varstash); |
3d35f11b |
525 | #endif |
44a8e56a |
526 | if (!isGV(vargv)) |
527 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
3d35f11b |
528 | LEAVE; |
44a8e56a |
529 | varsv = GvSV(vargv); |
4d1ff10f |
530 | #ifdef USE_5005THREADS |
4755096e |
531 | sv_lock(varsv); |
3d35f11b |
532 | #endif |
44a8e56a |
533 | sv_setpv(varsv, HvNAME(stash)); |
534 | sv_catpvn(varsv, "::", 2); |
535 | sv_catpvn(varsv, name, len); |
536 | SvTAINTED_off(varsv); |
a0d0e21e |
537 | return gv; |
538 | } |
539 | |
d2c93421 |
540 | /* The "gv" parameter should be the glob known to Perl code as *! |
541 | * The scalar must already have been magicalized. |
542 | */ |
543 | STATIC void |
544 | S_require_errno(pTHX_ GV *gv) |
545 | { |
546 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
547 | |
548 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
549 | dSP; |
550 | PUTBACK; |
551 | ENTER; |
552 | save_scalar(gv); /* keep the value of $! */ |
84f1fa11 |
553 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
554 | newSVpvn("Errno",5), Nullsv); |
d2c93421 |
555 | LEAVE; |
556 | SPAGAIN; |
557 | stash = gv_stashpvn("Errno",5,FALSE); |
558 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
559 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
560 | } |
561 | } |
562 | |
954c1994 |
563 | /* |
564 | =for apidoc gv_stashpv |
565 | |
386d01d6 |
566 | Returns a pointer to the stash for a specified package. C<name> should |
567 | be a valid UTF-8 string. If C<create> is set then the package will be |
568 | created if it does not already exist. If C<create> is not set and the |
569 | package does not exist then NULL is returned. |
954c1994 |
570 | |
571 | =cut |
572 | */ |
573 | |
a0d0e21e |
574 | HV* |
864dbfa3 |
575 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
576 | { |
dc437b57 |
577 | return gv_stashpvn(name, strlen(name), create); |
578 | } |
579 | |
580 | HV* |
864dbfa3 |
581 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
582 | { |
46fc3d4c |
583 | char smallbuf[256]; |
584 | char *tmpbuf; |
a0d0e21e |
585 | HV *stash; |
586 | GV *tmpgv; |
dc437b57 |
587 | |
46fc3d4c |
588 | if (namelen + 3 < sizeof smallbuf) |
589 | tmpbuf = smallbuf; |
590 | else |
591 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
592 | Copy(name,tmpbuf,namelen,char); |
593 | tmpbuf[namelen++] = ':'; |
594 | tmpbuf[namelen++] = ':'; |
595 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
596 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
597 | if (tmpbuf != smallbuf) |
598 | Safefree(tmpbuf); |
a0d0e21e |
599 | if (!tmpgv) |
600 | return 0; |
601 | if (!GvHV(tmpgv)) |
602 | GvHV(tmpgv) = newHV(); |
603 | stash = GvHV(tmpgv); |
604 | if (!HvNAME(stash)) |
605 | HvNAME(stash) = savepv(name); |
606 | return stash; |
463ee0b2 |
607 | } |
608 | |
954c1994 |
609 | /* |
610 | =for apidoc gv_stashsv |
611 | |
386d01d6 |
612 | Returns a pointer to the stash for a specified package, which must be a |
613 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
614 | |
615 | =cut |
616 | */ |
617 | |
a0d0e21e |
618 | HV* |
864dbfa3 |
619 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
620 | { |
dc437b57 |
621 | register char *ptr; |
622 | STRLEN len; |
623 | ptr = SvPV(sv,len); |
624 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
625 | } |
626 | |
627 | |
463ee0b2 |
628 | GV * |
864dbfa3 |
629 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
79072805 |
630 | { |
08105a92 |
631 | register const char *name = nambeg; |
463ee0b2 |
632 | register GV *gv = 0; |
79072805 |
633 | GV**gvp; |
79072805 |
634 | I32 len; |
08105a92 |
635 | register const char *namend; |
463ee0b2 |
636 | HV *stash = 0; |
79072805 |
637 | |
c07a80fd |
638 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
639 | name++; |
640 | |
79072805 |
641 | for (namend = name; *namend; namend++) { |
1d7c1841 |
642 | if ((*namend == ':' && namend[1] == ':') |
643 | || (*namend == '\'' && namend[1])) |
463ee0b2 |
644 | { |
463ee0b2 |
645 | if (!stash) |
3280af22 |
646 | stash = PL_defstash; |
dc437b57 |
647 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
648 | return Nullgv; |
463ee0b2 |
649 | |
85e6fe83 |
650 | len = namend - name; |
651 | if (len > 0) { |
3c78fafa |
652 | char smallbuf[256]; |
62b57502 |
653 | char *tmpbuf; |
62b57502 |
654 | |
25c09a70 |
655 | if (len + 3 < sizeof (smallbuf)) |
3c78fafa |
656 | tmpbuf = smallbuf; |
62b57502 |
657 | else |
658 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
659 | Copy(name, tmpbuf, len, char); |
660 | tmpbuf[len++] = ':'; |
661 | tmpbuf[len++] = ':'; |
662 | tmpbuf[len] = '\0'; |
463ee0b2 |
663 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
664 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
665 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
666 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
667 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
668 | else |
669 | GvMULTI_on(gv); |
670 | } |
3c78fafa |
671 | if (tmpbuf != smallbuf) |
62b57502 |
672 | Safefree(tmpbuf); |
3280af22 |
673 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
674 | return Nullgv; |
85e6fe83 |
675 | |
463ee0b2 |
676 | if (!(stash = GvHV(gv))) |
677 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
678 | |
463ee0b2 |
679 | if (!HvNAME(stash)) |
a0d0e21e |
680 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
681 | } |
682 | |
683 | if (*namend == ':') |
684 | namend++; |
685 | namend++; |
686 | name = namend; |
687 | if (!*name) |
3280af22 |
688 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
689 | } |
79072805 |
690 | } |
a0d0e21e |
691 | len = namend - name; |
692 | if (!len) |
693 | len = 1; |
463ee0b2 |
694 | |
695 | /* No stash in name, so see how we can default */ |
696 | |
697 | if (!stash) { |
7e2040f0 |
698 | if (isIDFIRST_lazy(name)) { |
9607fc9c |
699 | bool global = FALSE; |
700 | |
463ee0b2 |
701 | if (isUPPER(*name)) { |
9d116dd7 |
702 | if (*name == 'S' && ( |
703 | strEQ(name, "SIG") || |
704 | strEQ(name, "STDIN") || |
705 | strEQ(name, "STDOUT") || |
706 | strEQ(name, "STDERR"))) |
707 | global = TRUE; |
708 | else if (*name == 'I' && strEQ(name, "INC")) |
709 | global = TRUE; |
710 | else if (*name == 'E' && strEQ(name, "ENV")) |
711 | global = TRUE; |
463ee0b2 |
712 | else if (*name == 'A' && ( |
713 | strEQ(name, "ARGV") || |
9d116dd7 |
714 | strEQ(name, "ARGVOUT"))) |
463ee0b2 |
715 | global = TRUE; |
716 | } |
c99da370 |
717 | else if (*name == '_' && !name[1]) |
463ee0b2 |
718 | global = TRUE; |
9607fc9c |
719 | |
463ee0b2 |
720 | if (global) |
3280af22 |
721 | stash = PL_defstash; |
722 | else if ((COP*)PL_curcop == &PL_compiling) { |
723 | stash = PL_curstash; |
724 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
725 | sv_type != SVt_PVCV && |
726 | sv_type != SVt_PVGV && |
4633a7c4 |
727 | sv_type != SVt_PVFM && |
c07a80fd |
728 | sv_type != SVt_PVIO && |
377b8fbc |
729 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
730 | { |
4633a7c4 |
731 | gvp = (GV**)hv_fetch(stash,name,len,0); |
732 | if (!gvp || |
3280af22 |
733 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
734 | SvTYPE(*gvp) != SVt_PVGV) |
735 | { |
4633a7c4 |
736 | stash = 0; |
a5f75d66 |
737 | } |
155aba94 |
738 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
739 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
740 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
741 | { |
cea2e8a9 |
742 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
743 | sv_type == SVt_PVAV ? '@' : |
744 | sv_type == SVt_PVHV ? '%' : '$', |
745 | name); |
8ebc5c01 |
746 | if (GvCVu(*gvp)) |
cc507455 |
747 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
748 | stash = 0; |
4633a7c4 |
749 | } |
a0d0e21e |
750 | } |
85e6fe83 |
751 | } |
463ee0b2 |
752 | else |
1d7c1841 |
753 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
754 | } |
755 | else |
3280af22 |
756 | stash = PL_defstash; |
463ee0b2 |
757 | } |
758 | |
759 | /* By this point we should have a stash and a name */ |
760 | |
a0d0e21e |
761 | if (!stash) { |
5a844595 |
762 | if (add) { |
763 | qerror(Perl_mess(aTHX_ |
764 | "Global symbol \"%s%s\" requires explicit package name", |
765 | (sv_type == SVt_PV ? "$" |
766 | : sv_type == SVt_PVAV ? "@" |
767 | : sv_type == SVt_PVHV ? "%" |
768 | : ""), name)); |
a0d0e21e |
769 | } |
de11ba31 |
770 | return Nullgv; |
a0d0e21e |
771 | } |
772 | |
773 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
774 | return Nullgv; |
775 | |
79072805 |
776 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
777 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
778 | return Nullgv; |
779 | gv = *gvp; |
780 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
781 | if (add) { |
a5f75d66 |
782 | GvMULTI_on(gv); |
a0d0e21e |
783 | gv_init_sv(gv, sv_type); |
d2c93421 |
784 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
785 | require_errno(gv); |
a0d0e21e |
786 | } |
79072805 |
787 | return gv; |
55d729e4 |
788 | } else if (add & GV_NOINIT) { |
789 | return gv; |
79072805 |
790 | } |
93a17b20 |
791 | |
792 | /* Adding a new symbol */ |
793 | |
0453d815 |
794 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d |
795 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 |
796 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
797 | gv_init_sv(gv, sv_type); |
93a17b20 |
798 | |
7272584d |
799 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
800 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
801 | GvMULTI_on(gv) ; |
802 | |
93a17b20 |
803 | /* set up magic where warranted */ |
804 | switch (*name) { |
a0d0e21e |
805 | case 'A': |
806 | if (strEQ(name, "ARGV")) { |
807 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
808 | } |
809 | break; |
a0d0e21e |
810 | case 'E': |
811 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
812 | GvMULTI_on(gv); |
a0d0e21e |
813 | break; |
463ee0b2 |
814 | case 'I': |
815 | if (strEQ(name, "ISA")) { |
816 | AV* av = GvAVn(gv); |
a5f75d66 |
817 | GvMULTI_on(gv); |
14befaf4 |
818 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0); |
93965878 |
819 | /* NOTE: No support for tied ISA */ |
55d729e4 |
820 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
821 | && AvFILLp(av) == -1) |
85e6fe83 |
822 | { |
a0d0e21e |
823 | char *pname; |
79cb57f6 |
824 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
dc437b57 |
825 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
826 | av_push(av, newSVpvn(pname = "DB_File",7)); |
dc437b57 |
827 | gv_stashpvn(pname, 7, TRUE); |
79cb57f6 |
828 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
dc437b57 |
829 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
830 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
dc437b57 |
831 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
832 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
dc437b57 |
833 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
834 | } |
463ee0b2 |
835 | } |
836 | break; |
a0d0e21e |
837 | case 'O': |
838 | if (strEQ(name, "OVERLOAD")) { |
839 | HV* hv = GvHVn(gv); |
a5f75d66 |
840 | GvMULTI_on(gv); |
14befaf4 |
841 | hv_magic(hv, Nullgv, PERL_MAGIC_overload); |
a0d0e21e |
842 | } |
843 | break; |
93a17b20 |
844 | case 'S': |
845 | if (strEQ(name, "SIG")) { |
846 | HV *hv; |
dc437b57 |
847 | I32 i; |
1d7c1841 |
848 | if (!PL_psig_ptr) { |
0a8e0eff |
849 | Newz(73, PL_psig_ptr, SIG_SIZE, SV*); |
850 | Newz(73, PL_psig_name, SIG_SIZE, SV*); |
851 | Newz(73, PL_psig_pend, SIG_SIZE, int); |
1d7c1841 |
852 | } |
853 | GvMULTI_on(gv); |
854 | hv = GvHVn(gv); |
14befaf4 |
855 | hv_magic(hv, Nullgv, PERL_MAGIC_sig); |
76d3c696 |
856 | for (i = 1; i < SIG_SIZE; i++) { |
dc437b57 |
857 | SV ** init; |
1d7c1841 |
858 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
859 | if (init) |
860 | sv_setsv(*init, &PL_sv_undef); |
22c35a8c |
861 | PL_psig_ptr[i] = 0; |
862 | PL_psig_name[i] = 0; |
0a8e0eff |
863 | PL_psig_pend[i] = 0; |
dc437b57 |
864 | } |
93a17b20 |
865 | } |
866 | break; |
09bef843 |
867 | case 'V': |
868 | if (strEQ(name, "VERSION")) |
869 | GvMULTI_on(gv); |
870 | break; |
93a17b20 |
871 | |
872 | case '&': |
93a17b20 |
873 | case '`': |
93a17b20 |
874 | case '\'': |
b4a9608f |
875 | if ( |
876 | len > 1 || |
877 | sv_type == SVt_PVAV || |
878 | sv_type == SVt_PVHV || |
879 | sv_type == SVt_PVCV || |
b4a9608f |
880 | sv_type == SVt_PVFM || |
881 | sv_type == SVt_PVIO |
882 | ) { break; } |
3280af22 |
883 | PL_sawampersand = TRUE; |
a0d0e21e |
884 | goto ro_magicalize; |
93a17b20 |
885 | |
886 | case ':': |
463ee0b2 |
887 | if (len > 1) |
888 | break; |
3280af22 |
889 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 |
890 | goto magicalize; |
891 | |
ff0cee69 |
892 | case '?': |
893 | if (len > 1) |
894 | break; |
895 | #ifdef COMPLEX_STATUS |
07f14f54 |
896 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
ff0cee69 |
897 | #endif |
898 | goto magicalize; |
899 | |
067391ea |
900 | case '!': |
4318d5a0 |
901 | if (len > 1) |
067391ea |
902 | break; |
d2c93421 |
903 | |
904 | /* If %! has been used, automatically load Errno.pm. |
905 | The require will itself set errno, so in order to |
906 | preserve its value we have to set up the magic |
907 | now (rather than going to magicalize) |
908 | */ |
909 | |
14befaf4 |
910 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
911 | |
912 | if (sv_type == SVt_PVHV) |
913 | require_errno(gv); |
914 | |
915 | break; |
6cef1e77 |
916 | case '-': |
917 | if (len > 1) |
918 | break; |
919 | else { |
920 | AV* av = GvAVn(gv); |
14befaf4 |
921 | sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
922 | SvREADONLY_on(av); |
6cef1e77 |
923 | } |
924 | goto magicalize; |
93a17b20 |
925 | case '#': |
a0d0e21e |
926 | case '*': |
12bcd1a6 |
927 | if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && len == 1 && sv_type == SVt_PV) |
928 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), "Use of $%s is deprecated", name); |
a0d0e21e |
929 | /* FALL THROUGH */ |
930 | case '[': |
93a17b20 |
931 | case '^': |
932 | case '~': |
933 | case '=': |
93a17b20 |
934 | case '%': |
935 | case '.': |
93a17b20 |
936 | case '(': |
937 | case ')': |
938 | case '<': |
939 | case '>': |
940 | case ',': |
941 | case '\\': |
942 | case '/': |
16070b82 |
943 | case '\001': /* $^A */ |
944 | case '\003': /* $^C */ |
945 | case '\004': /* $^D */ |
16070b82 |
946 | case '\006': /* $^F */ |
947 | case '\010': /* $^H */ |
948 | case '\011': /* $^I, NOT \t in EBCDIC */ |
a01268b5 |
949 | case '\016': /* $^N */ |
16070b82 |
950 | case '\020': /* $^P */ |
463ee0b2 |
951 | if (len > 1) |
952 | break; |
953 | goto magicalize; |
d8ce0c9a |
954 | case '|': |
955 | if (len > 1) |
956 | break; |
957 | sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
958 | goto magicalize; |
0a378802 |
959 | case '\005': /* $^E && $^ENCODING */ |
960 | if (len > 1 && strNE(name, "\005NCODING")) |
961 | break; |
962 | goto magicalize; |
963 | |
ac27b0f5 |
964 | case '\017': /* $^O & $^OPEN */ |
965 | if (len > 1 && strNE(name, "\017PEN")) |
966 | break; |
967 | goto magicalize; |
16070b82 |
968 | case '\023': /* $^S */ |
6cef1e77 |
969 | if (len > 1) |
970 | break; |
971 | goto ro_magicalize; |
eb27b65e |
972 | case '\024': /* $^T, ${^TAINT} */ |
7c36658b |
973 | if (len == 1) |
974 | goto magicalize; |
975 | else if (strEQ(name, "\024AINT")) |
976 | goto ro_magicalize; |
977 | else |
978 | break; |
6a818117 |
979 | case '\027': /* $^W & $^WARNING_BITS */ |
a50e31ad |
980 | if (len > 1 && strNE(name, "\027ARNING_BITS") |
981 | && strNE(name, "\027IDE_SYSTEM_CALLS")) |
4438c4b7 |
982 | break; |
983 | goto magicalize; |
463ee0b2 |
984 | |
a0d0e21e |
985 | case '+': |
6cef1e77 |
986 | if (len > 1) |
987 | break; |
988 | else { |
989 | AV* av = GvAVn(gv); |
14befaf4 |
990 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
991 | SvREADONLY_on(av); |
6cef1e77 |
992 | } |
993 | /* FALL THROUGH */ |
463ee0b2 |
994 | case '1': |
995 | case '2': |
996 | case '3': |
997 | case '4': |
998 | case '5': |
999 | case '6': |
1000 | case '7': |
1001 | case '8': |
1002 | case '9': |
e521374c |
1003 | /* ensures variable is only digits */ |
1004 | /* ${"1foo"} fails this test (and is thus writeable) */ |
1005 | /* added by japhy, but borrowed from is_gv_magical */ |
1006 | |
1007 | if (len > 1) { |
1008 | const char *end = name + len; |
1009 | while (--end > name) { |
1010 | if (!isDIGIT(*end)) return gv; |
1011 | } |
1012 | } |
1013 | |
a0d0e21e |
1014 | ro_magicalize: |
1015 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
1016 | magicalize: |
14befaf4 |
1017 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
93a17b20 |
1018 | break; |
1019 | |
16070b82 |
1020 | case '\014': /* $^L */ |
463ee0b2 |
1021 | if (len > 1) |
1022 | break; |
93a17b20 |
1023 | sv_setpv(GvSV(gv),"\f"); |
3280af22 |
1024 | PL_formfeed = GvSV(gv); |
93a17b20 |
1025 | break; |
1026 | case ';': |
463ee0b2 |
1027 | if (len > 1) |
1028 | break; |
93a17b20 |
1029 | sv_setpv(GvSV(gv),"\034"); |
1030 | break; |
463ee0b2 |
1031 | case ']': |
1032 | if (len == 1) { |
f86702cc |
1033 | SV *sv = GvSV(gv); |
5089c844 |
1034 | (void)SvUPGRADE(sv, SVt_PVNV); |
6a6ba966 |
1035 | Perl_sv_setpvf(aTHX_ sv, |
1036 | #if defined(PERL_SUBVERSION) && (PERL_SUBVERSION > 0) |
1037 | "%8.6" |
1038 | #else |
1039 | "%5.3" |
1040 | #endif |
1041 | NVff, |
1042 | SvNVX(PL_patchlevel)); |
5089c844 |
1043 | SvNVX(sv) = SvNVX(PL_patchlevel); |
1044 | SvNOK_on(sv); |
5089c844 |
1045 | SvREADONLY_on(sv); |
93a17b20 |
1046 | } |
1047 | break; |
16070b82 |
1048 | case '\026': /* $^V */ |
1049 | if (len == 1) { |
1050 | SV *sv = GvSV(gv); |
1051 | GvSV(gv) = SvREFCNT_inc(PL_patchlevel); |
1052 | SvREFCNT_dec(sv); |
1053 | } |
1054 | break; |
79072805 |
1055 | } |
93a17b20 |
1056 | return gv; |
79072805 |
1057 | } |
1058 | |
1059 | void |
43693395 |
1060 | Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
1061 | { |
1062 | HV *hv = GvSTASH(gv); |
1063 | if (!hv) { |
1064 | (void)SvOK_off(sv); |
1065 | return; |
1066 | } |
1067 | sv_setpv(sv, prefix ? prefix : ""); |
1068 | if (keepmain || strNE(HvNAME(hv), "main")) { |
1069 | sv_catpv(sv,HvNAME(hv)); |
1070 | sv_catpvn(sv,"::", 2); |
1071 | } |
1072 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
1073 | } |
1074 | |
1075 | void |
864dbfa3 |
1076 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
1077 | { |
84e79d79 |
1078 | gv_fullname4(sv, gv, prefix, TRUE); |
79072805 |
1079 | } |
1080 | |
1081 | void |
43693395 |
1082 | Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
1083 | { |
1084 | GV *egv = GvEGV(gv); |
1085 | if (!egv) |
1086 | egv = gv; |
1087 | gv_fullname4(sv, egv, prefix, keepmain); |
1088 | } |
1089 | |
1090 | void |
864dbfa3 |
1091 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
1092 | { |
84e79d79 |
1093 | gv_efullname4(sv, gv, prefix, TRUE); |
f6aff53a |
1094 | } |
1095 | |
1096 | /* XXX compatibility with versions <= 5.003. */ |
1097 | void |
864dbfa3 |
1098 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
1099 | { |
1100 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
1101 | } |
1102 | |
1103 | /* XXX compatibility with versions <= 5.003. */ |
1104 | void |
864dbfa3 |
1105 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
1106 | { |
1107 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
1108 | } |
1109 | |
1110 | IO * |
864dbfa3 |
1111 | Perl_newIO(pTHX) |
79072805 |
1112 | { |
1113 | IO *io; |
8990e307 |
1114 | GV *iogv; |
1115 | |
1116 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
1117 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
1118 | SvREFCNT(io) = 1; |
1119 | SvOBJECT_on(io); |
c9de509e |
1120 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d |
1121 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1122 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
c9de509e |
1123 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
1124 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
1125 | return io; |
1126 | } |
1127 | |
1128 | void |
864dbfa3 |
1129 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1130 | { |
1131 | register HE *entry; |
1132 | register I32 i; |
1133 | register GV *gv; |
463ee0b2 |
1134 | HV *hv; |
1135 | |
8990e307 |
1136 | if (!HvARRAY(stash)) |
1137 | return; |
a0d0e21e |
1138 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
1139 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
1140 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
6676db26 |
1141 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv))) |
a0d0e21e |
1142 | { |
19b6c847 |
1143 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1144 | gv_check(hv); /* nested package */ |
1145 | } |
dc437b57 |
1146 | else if (isALPHA(*HeKEY(entry))) { |
1d7c1841 |
1147 | char *file; |
dc437b57 |
1148 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1149 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1150 | continue; |
1d7c1841 |
1151 | file = GvFILE(gv); |
1152 | /* performance hack: if filename is absolute and it's a standard |
1153 | * module, don't bother warning */ |
1154 | if (file |
1155 | && PERL_FILE_IS_ABSOLUTE(file) |
6eb630b7 |
1156 | #ifdef MACOS_TRADITIONAL |
1157 | && (instr(file, ":lib:") |
1158 | #else |
1159 | && (instr(file, "/lib/") |
1160 | #endif |
1161 | || instr(file, ".pm"))) |
1d7c1841 |
1162 | { |
8990e307 |
1163 | continue; |
1d7c1841 |
1164 | } |
1165 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1166 | #ifdef USE_ITHREADS |
1167 | CopFILE(PL_curcop) = file; /* set for warning */ |
1168 | #else |
1169 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1170 | #endif |
9014280d |
1171 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 |
1172 | "Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
1173 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
1174 | } |
79072805 |
1175 | } |
1176 | } |
1177 | } |
1178 | |
1179 | GV * |
864dbfa3 |
1180 | Perl_newGVgen(pTHX_ char *pack) |
79072805 |
1181 | { |
cea2e8a9 |
1182 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1183 | TRUE, SVt_PVGV); |
79072805 |
1184 | } |
1185 | |
1186 | /* hopefully this is only called on local symbol table entries */ |
1187 | |
1188 | GP* |
864dbfa3 |
1189 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1190 | { |
1d7c1841 |
1191 | if (!gp) |
1192 | return (GP*)NULL; |
79072805 |
1193 | gp->gp_refcnt++; |
44a8e56a |
1194 | if (gp->gp_cv) { |
1195 | if (gp->gp_cvgen) { |
1196 | /* multi-named GPs cannot be used for method cache */ |
1197 | SvREFCNT_dec(gp->gp_cv); |
1198 | gp->gp_cv = Nullcv; |
1199 | gp->gp_cvgen = 0; |
1200 | } |
1201 | else { |
1202 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1203 | PL_sub_generation++; |
44a8e56a |
1204 | } |
1205 | } |
79072805 |
1206 | return gp; |
79072805 |
1207 | } |
1208 | |
1209 | void |
864dbfa3 |
1210 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1211 | { |
79072805 |
1212 | GP* gp; |
1213 | |
1214 | if (!gv || !(gp = GvGP(gv))) |
1215 | return; |
f248d071 |
1216 | if (gp->gp_refcnt == 0) { |
1217 | if (ckWARN_d(WARN_INTERNAL)) |
9014280d |
1218 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
f248d071 |
1219 | "Attempt to free unreferenced glob pointers"); |
79072805 |
1220 | return; |
1221 | } |
44a8e56a |
1222 | if (gp->gp_cv) { |
1223 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1224 | PL_sub_generation++; |
44a8e56a |
1225 | } |
748a9306 |
1226 | if (--gp->gp_refcnt > 0) { |
1227 | if (gp->gp_egv == gv) |
1228 | gp->gp_egv = 0; |
79072805 |
1229 | return; |
748a9306 |
1230 | } |
79072805 |
1231 | |
8990e307 |
1232 | SvREFCNT_dec(gp->gp_sv); |
1233 | SvREFCNT_dec(gp->gp_av); |
1234 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
1235 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
1236 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
1237 | SvREFCNT_dec(gp->gp_form); |
1238 | |
79072805 |
1239 | Safefree(gp); |
1240 | GvGP(gv) = 0; |
1241 | } |
1242 | |
d460ef45 |
1243 | int |
1244 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1245 | { |
1246 | AMT *amtp = (AMT*)mg->mg_ptr; |
1247 | if (amtp && AMT_AMAGIC(amtp)) { |
1248 | int i; |
1249 | for (i = 1; i < NofAMmeth; i++) { |
1250 | CV *cv = amtp->table[i]; |
1251 | if (cv != Nullcv) { |
1252 | SvREFCNT_dec((SV *) cv); |
1253 | amtp->table[i] = Nullcv; |
1254 | } |
1255 | } |
1256 | } |
1257 | return 0; |
1258 | } |
1259 | |
a0d0e21e |
1260 | /* Updates and caches the CV's */ |
1261 | |
1262 | bool |
864dbfa3 |
1263 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1264 | { |
a0d0e21e |
1265 | GV* gv; |
1266 | CV* cv; |
14befaf4 |
1267 | MAGIC* mg=mg_find((SV*)stash, PERL_MAGIC_overload_table); |
8ac85365 |
1268 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1269 | AMT amt; |
a0d0e21e |
1270 | |
3280af22 |
1271 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1272 | && amtp->was_ok_sub == PL_sub_generation) |
eb160463 |
1273 | return (bool)AMT_OVERLOADED(amtp); |
14befaf4 |
1274 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e |
1275 | |
cea2e8a9 |
1276 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
a0d0e21e |
1277 | |
d460ef45 |
1278 | Zero(&amt,1,AMT); |
3280af22 |
1279 | amt.was_ok_am = PL_amagic_generation; |
1280 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1281 | amt.fallback = AMGfallNO; |
1282 | amt.flags = 0; |
1283 | |
a6006777 |
1284 | { |
32251b26 |
1285 | int filled = 0, have_ovl = 0; |
1286 | int i, lim = 1; |
a6006777 |
1287 | SV* sv = NULL; |
a6006777 |
1288 | |
22c35a8c |
1289 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1290 | |
89ffc314 |
1291 | /* Try to find via inheritance. */ |
1292 | gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1293 | if (gv) |
1294 | sv = GvSV(gv); |
1295 | |
1296 | if (!gv) |
32251b26 |
1297 | lim = DESTROY_amg; /* Skip overloading entries. */ |
89ffc314 |
1298 | else if (SvTRUE(sv)) |
1299 | amt.fallback=AMGfallYES; |
1300 | else if (SvOK(sv)) |
1301 | amt.fallback=AMGfallNEVER; |
a6006777 |
1302 | |
32251b26 |
1303 | for (i = 1; i < lim; i++) |
1304 | amt.table[i] = Nullcv; |
1305 | for (; i < NofAMmeth; i++) { |
c8ce92fc |
1306 | char *cooky = (char*)PL_AMG_names[i]; |
32251b26 |
1307 | /* Human-readable form, for debugging: */ |
1308 | char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
89ffc314 |
1309 | STRLEN l = strlen(cooky); |
1310 | |
cea2e8a9 |
1311 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
44a8e56a |
1312 | cp, HvNAME(stash)) ); |
611c1e95 |
1313 | /* don't fill the cache while looking up! |
1314 | Creation of inheritance stubs in intermediate packages may |
1315 | conflict with the logic of runtime method substitution. |
1316 | Indeed, for inheritance A -> B -> C, if C overloads "+0", |
1317 | then we could have created stubs for "(+0" in A and C too. |
1318 | But if B overloads "bool", we may want to use it for |
1319 | numifying instead of C's "+0". */ |
1320 | if (i >= DESTROY_amg) |
1321 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); |
1322 | else /* Autoload taken care of below */ |
1323 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); |
46fc3d4c |
1324 | cv = 0; |
89ffc314 |
1325 | if (gv && (cv = GvCV(gv))) { |
44a8e56a |
1326 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1327 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 |
1328 | /* This is a hack to support autoloading..., while |
1329 | knowing *which* methods were declared as overloaded. */ |
44a8e56a |
1330 | /* GvSV contains the name of the method. */ |
4ea42e7f |
1331 | GV *ngv = Nullgv; |
44a8e56a |
1332 | |
b267980d |
1333 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
9c5ffd7c |
1334 | SvPV_nolen(GvSV(gv)), cp, HvNAME(stash)) ); |
b267980d |
1335 | if (!SvPOK(GvSV(gv)) |
dc848c6f |
1336 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1337 | FALSE))) |
1338 | { |
44a8e56a |
1339 | /* Can be an import stub (created by `can'). */ |
1340 | if (GvCVGEN(gv)) { |
b267980d |
1341 | Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1342 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1343 | cp, HvNAME(stash)); |
1344 | } else |
b267980d |
1345 | Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1346 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1347 | cp, HvNAME(stash)); |
1348 | } |
dc848c6f |
1349 | cv = GvCV(gv = ngv); |
44a8e56a |
1350 | } |
cea2e8a9 |
1351 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
44a8e56a |
1352 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1353 | GvNAME(CvGV(cv))) ); |
1354 | filled = 1; |
32251b26 |
1355 | if (i < DESTROY_amg) |
1356 | have_ovl = 1; |
611c1e95 |
1357 | } else if (gv) { /* Autoloaded... */ |
1358 | cv = (CV*)gv; |
1359 | filled = 1; |
44a8e56a |
1360 | } |
a6006777 |
1361 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1362 | } |
a0d0e21e |
1363 | if (filled) { |
a6006777 |
1364 | AMT_AMAGIC_on(&amt); |
32251b26 |
1365 | if (have_ovl) |
1366 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1367 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1368 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1369 | return have_ovl; |
a0d0e21e |
1370 | } |
1371 | } |
a6006777 |
1372 | /* Here we have no table: */ |
9cbac4c7 |
1373 | /* no_table: */ |
a6006777 |
1374 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1375 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1376 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1377 | return FALSE; |
1378 | } |
1379 | |
32251b26 |
1380 | |
1381 | CV* |
1382 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1383 | { |
3f8f4626 |
1384 | MAGIC *mg; |
32251b26 |
1385 | AMT *amtp; |
3ad83ce7 |
1386 | CV *ret; |
32251b26 |
1387 | |
3f8f4626 |
1388 | if (!stash) |
1389 | return Nullcv; |
14befaf4 |
1390 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1391 | if (!mg) { |
1392 | do_update: |
1393 | Gv_AMupdate(stash); |
14befaf4 |
1394 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1395 | } |
1396 | amtp = (AMT*)mg->mg_ptr; |
1397 | if ( amtp->was_ok_am != PL_amagic_generation |
1398 | || amtp->was_ok_sub != PL_sub_generation ) |
1399 | goto do_update; |
3ad83ce7 |
1400 | if (AMT_AMAGIC(amtp)) { |
1401 | ret = amtp->table[id]; |
1402 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1403 | /* Passing it through may have resulted in a warning |
1404 | "Inherited AUTOLOAD for a non-method deprecated", since |
1405 | our caller is going through a function call, not a method call. |
1406 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ |
1407 | GV *gv = gv_fetchmethod(stash, (char*)PL_AMG_names[id]); |
1408 | |
1409 | if (gv && GvCV(gv)) |
1410 | return GvCV(gv); |
1411 | } |
1412 | return ret; |
1413 | } |
1414 | |
32251b26 |
1415 | return Nullcv; |
1416 | } |
1417 | |
1418 | |
a0d0e21e |
1419 | SV* |
864dbfa3 |
1420 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1421 | { |
b267980d |
1422 | MAGIC *mg; |
9c5ffd7c |
1423 | CV *cv=NULL; |
a0d0e21e |
1424 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1425 | AMT *amtp=NULL, *oamtp=NULL; |
497b47a8 |
1426 | int off=0, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
ee239bfe |
1427 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
497b47a8 |
1428 | #ifdef DEBUGGING |
1429 | int fl=0; |
497b47a8 |
1430 | #endif |
25716404 |
1431 | HV* stash=NULL; |
a0d0e21e |
1432 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 |
1433 | && (stash = SvSTASH(SvRV(left))) |
1434 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1435 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1436 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1437 | : (CV **) NULL)) |
b267980d |
1438 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1439 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1440 | * usual method */ |
497b47a8 |
1441 | ( |
1442 | #ifdef DEBUGGING |
1443 | fl = 1, |
1444 | #endif |
1445 | cv = cvp[off=method])))) { |
a0d0e21e |
1446 | lr = -1; /* Call method for left argument */ |
1447 | } else { |
1448 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1449 | int logic; |
1450 | |
1451 | /* look for substituted methods */ |
ee239bfe |
1452 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1453 | switch (method) { |
1454 | case inc_amg: |
ee239bfe |
1455 | force_cpy = 1; |
1456 | if ((cv = cvp[off=add_ass_amg]) |
1457 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1458 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1459 | } |
1460 | break; |
1461 | case dec_amg: |
ee239bfe |
1462 | force_cpy = 1; |
1463 | if ((cv = cvp[off = subtr_ass_amg]) |
1464 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1465 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1466 | } |
1467 | break; |
1468 | case bool__amg: |
1469 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1470 | break; |
1471 | case numer_amg: |
1472 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1473 | break; |
1474 | case string_amg: |
1475 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1476 | break; |
dc437b57 |
1477 | case not_amg: |
b267980d |
1478 | (void)((cv = cvp[off=bool__amg]) |
dc437b57 |
1479 | || (cv = cvp[off=numer_amg]) |
1480 | || (cv = cvp[off=string_amg])); |
1481 | postpr = 1; |
1482 | break; |
748a9306 |
1483 | case copy_amg: |
1484 | { |
76e3520e |
1485 | /* |
1486 | * SV* ref causes confusion with the interpreter variable of |
1487 | * the same name |
1488 | */ |
1489 | SV* tmpRef=SvRV(left); |
1490 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1491 | /* |
1492 | * Just to be extra cautious. Maybe in some |
1493 | * additional cases sv_setsv is safe, too. |
1494 | */ |
76e3520e |
1495 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1496 | SvOBJECT_on(newref); |
76e3520e |
1497 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1498 | return newref; |
1499 | } |
1500 | } |
1501 | break; |
a0d0e21e |
1502 | case abs_amg: |
b267980d |
1503 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1504 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1505 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1506 | if (off1==lt_amg) { |
748a9306 |
1507 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1508 | lt_amg,AMGf_noright); |
1509 | logic = SvTRUE(lessp); |
1510 | } else { |
748a9306 |
1511 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1512 | ncmp_amg,AMGf_noright); |
1513 | logic = (SvNV(lessp) < 0); |
1514 | } |
1515 | if (logic) { |
1516 | if (off==subtr_amg) { |
1517 | right = left; |
748a9306 |
1518 | left = nullsv; |
a0d0e21e |
1519 | lr = 1; |
1520 | } |
1521 | } else { |
1522 | return left; |
1523 | } |
1524 | } |
1525 | break; |
1526 | case neg_amg: |
155aba94 |
1527 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1528 | right = left; |
1529 | left = sv_2mortal(newSViv(0)); |
1530 | lr = 1; |
1531 | } |
1532 | break; |
f216259d |
1533 | case int_amg: |
f5284f61 |
1534 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1535 | /* FAIL safe */ |
1536 | return NULL; /* Delegate operation to standard mechanisms. */ |
1537 | break; |
f5284f61 |
1538 | case to_sv_amg: |
1539 | case to_av_amg: |
1540 | case to_hv_amg: |
1541 | case to_gv_amg: |
1542 | case to_cv_amg: |
1543 | /* FAIL safe */ |
b267980d |
1544 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1545 | break; |
a0d0e21e |
1546 | default: |
1547 | goto not_found; |
1548 | } |
1549 | if (!cv) goto not_found; |
1550 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
25716404 |
1551 | && (stash = SvSTASH(SvRV(right))) |
1552 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1553 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1554 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1555 | : (CV **) NULL)) |
a0d0e21e |
1556 | && (cv = cvp[off=method])) { /* Method for right |
1557 | * argument found */ |
1558 | lr=1; |
b267980d |
1559 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1560 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1561 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1562 | && !(flags & AMGf_unary)) { |
1563 | /* We look for substitution for |
1564 | * comparison operations and |
fc36a67e |
1565 | * concatenation */ |
a0d0e21e |
1566 | if (method==concat_amg || method==concat_ass_amg |
1567 | || method==repeat_amg || method==repeat_ass_amg) { |
1568 | return NULL; /* Delegate operation to string conversion */ |
1569 | } |
1570 | off = -1; |
1571 | switch (method) { |
1572 | case lt_amg: |
1573 | case le_amg: |
1574 | case gt_amg: |
1575 | case ge_amg: |
1576 | case eq_amg: |
1577 | case ne_amg: |
1578 | postpr = 1; off=ncmp_amg; break; |
1579 | case slt_amg: |
1580 | case sle_amg: |
1581 | case sgt_amg: |
1582 | case sge_amg: |
1583 | case seq_amg: |
1584 | case sne_amg: |
1585 | postpr = 1; off=scmp_amg; break; |
1586 | } |
1587 | if (off != -1) cv = cvp[off]; |
1588 | if (!cv) { |
1589 | goto not_found; |
1590 | } |
1591 | } else { |
a6006777 |
1592 | not_found: /* No method found, either report or croak */ |
b267980d |
1593 | switch (method) { |
1594 | case to_sv_amg: |
1595 | case to_av_amg: |
1596 | case to_hv_amg: |
1597 | case to_gv_amg: |
1598 | case to_cv_amg: |
1599 | /* FAIL safe */ |
1600 | return left; /* Delegate operation to standard mechanisms. */ |
1601 | break; |
1602 | } |
a0d0e21e |
1603 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1604 | notfound = 1; lr = -1; |
1605 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1606 | notfound = 1; lr = 1; |
1607 | } else { |
46fc3d4c |
1608 | SV *msg; |
774d564b |
1609 | if (off==-1) off=method; |
b267980d |
1610 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
46fc3d4c |
1611 | "Operation `%s': no method found,%sargument %s%s%s%s", |
89ffc314 |
1612 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1613 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1614 | SvAMAGIC(left)? |
a0d0e21e |
1615 | "in overloaded package ": |
1616 | "has no overloaded magic", |
b267980d |
1617 | SvAMAGIC(left)? |
a0d0e21e |
1618 | HvNAME(SvSTASH(SvRV(left))): |
1619 | "", |
b267980d |
1620 | SvAMAGIC(right)? |
e7ea3e70 |
1621 | ",\n\tright argument in overloaded package ": |
b267980d |
1622 | (flags & AMGf_unary |
e7ea3e70 |
1623 | ? "" |
1624 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1625 | SvAMAGIC(right)? |
a0d0e21e |
1626 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1627 | "")); |
a0d0e21e |
1628 | if (amtp && amtp->fallback >= AMGfallYES) { |
cea2e8a9 |
1629 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
a0d0e21e |
1630 | } else { |
894356b3 |
1631 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1632 | } |
1633 | return NULL; |
1634 | } |
ee239bfe |
1635 | force_cpy = force_cpy || assign; |
a0d0e21e |
1636 | } |
1637 | } |
497b47a8 |
1638 | #ifdef DEBUGGING |
a0d0e21e |
1639 | if (!notfound) { |
497b47a8 |
1640 | DEBUG_o(Perl_deb(aTHX_ |
1641 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
1642 | AMG_id2name(off), |
1643 | method+assignshift==off? "" : |
1644 | " (initially `", |
1645 | method+assignshift==off? "" : |
1646 | AMG_id2name(method+assignshift), |
1647 | method+assignshift==off? "" : "')", |
1648 | flags & AMGf_unary? "" : |
1649 | lr==1 ? " for right argument": " for left argument", |
1650 | flags & AMGf_unary? " for argument" : "", |
25716404 |
1651 | stash ? HvNAME(stash) : "null", |
497b47a8 |
1652 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1653 | } |
497b47a8 |
1654 | #endif |
748a9306 |
1655 | /* Since we use shallow copy during assignment, we need |
1656 | * to dublicate the contents, probably calling user-supplied |
1657 | * version of copy operator |
1658 | */ |
ee239bfe |
1659 | /* We need to copy in following cases: |
1660 | * a) Assignment form was called. |
1661 | * assignshift==1, assign==T, method + 1 == off |
1662 | * b) Increment or decrement, called directly. |
1663 | * assignshift==0, assign==0, method + 0 == off |
1664 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1665 | * assignshift==0, assign==T, |
ee239bfe |
1666 | * force_cpy == T |
1667 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1668 | * assignshift==0, assign==0, |
ee239bfe |
1669 | * force_cpy == T |
1670 | * e) Assignment form translated to nomethod. |
1671 | * assignshift==1, assign==T, method + 1 != off |
1672 | * force_cpy == T |
1673 | */ |
1674 | /* off is method, method+assignshift, or a result of opcode substitution. |
1675 | * In the latter case assignshift==0, so only notfound case is important. |
1676 | */ |
1677 | if (( (method + assignshift == off) |
1678 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1679 | || force_cpy) |
1680 | RvDEEPCP(left); |
a0d0e21e |
1681 | { |
1682 | dSP; |
1683 | BINOP myop; |
1684 | SV* res; |
54310121 |
1685 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1686 | |
54310121 |
1687 | CATCH_SET(TRUE); |
a0d0e21e |
1688 | Zero(&myop, 1, BINOP); |
1689 | myop.op_last = (OP *) &myop; |
1690 | myop.op_next = Nullop; |
54310121 |
1691 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1692 | |
e788e7d3 |
1693 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1694 | ENTER; |
462e5cf6 |
1695 | SAVEOP(); |
533c011a |
1696 | PL_op = (OP *) &myop; |
3280af22 |
1697 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1698 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1699 | PUTBACK; |
cea2e8a9 |
1700 | pp_pushmark(); |
a0d0e21e |
1701 | |
924508f0 |
1702 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1703 | PUSHs(lr>0? right: left); |
1704 | PUSHs(lr>0? left: right); |
3280af22 |
1705 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1706 | if (notfound) { |
89ffc314 |
1707 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1708 | } |
1709 | PUSHs((SV*)cv); |
1710 | PUTBACK; |
1711 | |
155aba94 |
1712 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1713 | CALLRUNOPS(aTHX); |
a0d0e21e |
1714 | LEAVE; |
1715 | SPAGAIN; |
1716 | |
1717 | res=POPs; |
ebafeae7 |
1718 | PUTBACK; |
d3acc0f7 |
1719 | POPSTACK; |
54310121 |
1720 | CATCH_SET(oldcatch); |
a0d0e21e |
1721 | |
a0d0e21e |
1722 | if (postpr) { |
9c5ffd7c |
1723 | int ans=0; |
a0d0e21e |
1724 | switch (method) { |
1725 | case le_amg: |
1726 | case sle_amg: |
1727 | ans=SvIV(res)<=0; break; |
1728 | case lt_amg: |
1729 | case slt_amg: |
1730 | ans=SvIV(res)<0; break; |
1731 | case ge_amg: |
1732 | case sge_amg: |
1733 | ans=SvIV(res)>=0; break; |
1734 | case gt_amg: |
1735 | case sgt_amg: |
1736 | ans=SvIV(res)>0; break; |
1737 | case eq_amg: |
1738 | case seq_amg: |
1739 | ans=SvIV(res)==0; break; |
1740 | case ne_amg: |
1741 | case sne_amg: |
1742 | ans=SvIV(res)!=0; break; |
1743 | case inc_amg: |
1744 | case dec_amg: |
bbce6d69 |
1745 | SvSetSV(left,res); return left; |
dc437b57 |
1746 | case not_amg: |
fe7ac86a |
1747 | ans=!SvTRUE(res); break; |
a0d0e21e |
1748 | } |
54310121 |
1749 | return boolSV(ans); |
748a9306 |
1750 | } else if (method==copy_amg) { |
1751 | if (!SvROK(res)) { |
cea2e8a9 |
1752 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1753 | } |
1754 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1755 | } else { |
1756 | return res; |
1757 | } |
1758 | } |
1759 | } |
c9d5ac95 |
1760 | |
1761 | /* |
1762 | =for apidoc is_gv_magical |
1763 | |
1764 | Returns C<TRUE> if given the name of a magical GV. |
1765 | |
1766 | Currently only useful internally when determining if a GV should be |
1767 | created even in rvalue contexts. |
1768 | |
1769 | C<flags> is not used at present but available for future extension to |
1770 | allow selecting particular classes of magical variable. |
1771 | |
1772 | =cut |
1773 | */ |
1774 | bool |
1775 | Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) |
1776 | { |
1777 | if (!len) |
1778 | return FALSE; |
1779 | |
1780 | switch (*name) { |
1781 | case 'I': |
1782 | if (len == 3 && strEQ(name, "ISA")) |
1783 | goto yes; |
1784 | break; |
1785 | case 'O': |
1786 | if (len == 8 && strEQ(name, "OVERLOAD")) |
1787 | goto yes; |
1788 | break; |
1789 | case 'S': |
1790 | if (len == 3 && strEQ(name, "SIG")) |
1791 | goto yes; |
1792 | break; |
ac27b0f5 |
1793 | case '\017': /* $^O & $^OPEN */ |
1794 | if (len == 1 |
563aca73 |
1795 | || (len == 4 && strEQ(name, "\017PEN"))) |
ac27b0f5 |
1796 | { |
1797 | goto yes; |
1798 | } |
1799 | break; |
c9d5ac95 |
1800 | case '\027': /* $^W & $^WARNING_BITS */ |
1801 | if (len == 1 |
1802 | || (len == 12 && strEQ(name, "\027ARNING_BITS")) |
1803 | || (len == 17 && strEQ(name, "\027IDE_SYSTEM_CALLS"))) |
1804 | { |
1805 | goto yes; |
1806 | } |
1807 | break; |
1808 | |
1809 | case '&': |
1810 | case '`': |
1811 | case '\'': |
1812 | case ':': |
1813 | case '?': |
1814 | case '!': |
1815 | case '-': |
1816 | case '#': |
1817 | case '*': |
1818 | case '[': |
1819 | case '^': |
1820 | case '~': |
1821 | case '=': |
1822 | case '%': |
1823 | case '.': |
1824 | case '(': |
1825 | case ')': |
1826 | case '<': |
1827 | case '>': |
1828 | case ',': |
1829 | case '\\': |
1830 | case '/': |
1831 | case '|': |
1832 | case '+': |
1833 | case ';': |
1834 | case ']': |
1835 | case '\001': /* $^A */ |
1836 | case '\003': /* $^C */ |
1837 | case '\004': /* $^D */ |
1838 | case '\005': /* $^E */ |
1839 | case '\006': /* $^F */ |
1840 | case '\010': /* $^H */ |
1841 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1842 | case '\014': /* $^L */ |
a01268b5 |
1843 | case '\016': /* $^N */ |
c9d5ac95 |
1844 | case '\020': /* $^P */ |
1845 | case '\023': /* $^S */ |
c9d5ac95 |
1846 | case '\026': /* $^V */ |
1847 | if (len == 1) |
1848 | goto yes; |
1849 | break; |
eb27b65e |
1850 | case '\024': /* $^T, ${^TAINT} */ |
1851 | if (len == 1 || strEQ(name, "\024AINT")) |
1852 | goto yes; |
1853 | break; |
c9d5ac95 |
1854 | case '1': |
1855 | case '2': |
1856 | case '3': |
1857 | case '4': |
1858 | case '5': |
1859 | case '6': |
1860 | case '7': |
1861 | case '8': |
1862 | case '9': |
1863 | if (len > 1) { |
1864 | char *end = name + len; |
1865 | while (--end > name) { |
1866 | if (!isDIGIT(*end)) |
1867 | return FALSE; |
1868 | } |
1869 | } |
1870 | yes: |
1871 | return TRUE; |
1872 | default: |
1873 | break; |
1874 | } |
1875 | return FALSE; |
1876 | } |