Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
4bb101f2 |
3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
acde74e1 |
4 | * 2000, 2001, 2002, 2003, 2004, 2005, 2006, by Larry Wall and others |
79072805 |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public |
7 | * License or the Artistic License, as specified in the README file. |
8 | * |
a0d0e21e |
9 | */ |
10 | |
11 | /* |
12 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure |
13 | * of your inquisitiveness, I shall spend all the rest of my days answering |
14 | * you. What more do you want to know?' |
15 | * 'The names of all the stars, and of all living things, and the whole |
16 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' |
17 | * laughed Pippin. |
79072805 |
18 | */ |
19 | |
ccfc67b7 |
20 | /* |
21 | =head1 GV Functions |
166f8a29 |
22 | |
23 | A GV is a structure which corresponds to to a Perl typeglob, ie *foo. |
24 | It is a structure that holds a pointer to a scalar, an array, a hash etc, |
25 | corresponding to $foo, @foo, %foo. |
26 | |
27 | GVs are usually found as values in stashes (symbol table hashes) where |
28 | Perl stores its global variables. |
29 | |
30 | =cut |
ccfc67b7 |
31 | */ |
32 | |
79072805 |
33 | #include "EXTERN.h" |
864dbfa3 |
34 | #define PERL_IN_GV_C |
79072805 |
35 | #include "perl.h" |
36 | |
f54cb97a |
37 | static const char S_autoload[] = "AUTOLOAD"; |
38 | static const STRLEN S_autolen = sizeof(S_autoload)-1; |
5c7983e5 |
39 | |
c69033f2 |
40 | |
41 | #ifdef PERL_DONT_CREATE_GVSV |
42 | GV * |
43 | Perl_gv_SVadd(pTHX_ GV *gv) |
44 | { |
45 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
46 | Perl_croak(aTHX_ "Bad symbol for scalar"); |
47 | if (!GvSV(gv)) |
561b68a9 |
48 | GvSV(gv) = newSV(0); |
c69033f2 |
49 | return gv; |
50 | } |
51 | #endif |
52 | |
79072805 |
53 | GV * |
864dbfa3 |
54 | Perl_gv_AVadd(pTHX_ register GV *gv) |
79072805 |
55 | { |
a0d0e21e |
56 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
57 | Perl_croak(aTHX_ "Bad symbol for array"); |
79072805 |
58 | if (!GvAV(gv)) |
59 | GvAV(gv) = newAV(); |
60 | return gv; |
61 | } |
62 | |
63 | GV * |
864dbfa3 |
64 | Perl_gv_HVadd(pTHX_ register GV *gv) |
79072805 |
65 | { |
a0d0e21e |
66 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
67 | Perl_croak(aTHX_ "Bad symbol for hash"); |
79072805 |
68 | if (!GvHV(gv)) |
463ee0b2 |
69 | GvHV(gv) = newHV(); |
79072805 |
70 | return gv; |
71 | } |
72 | |
73 | GV * |
864dbfa3 |
74 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e |
75 | { |
97aff369 |
76 | dVAR; |
8b5be85c |
77 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) { |
78 | |
79 | /* |
80 | * if it walks like a dirhandle, then let's assume that |
81 | * this is a dirhandle. |
82 | */ |
b37c2d43 |
83 | const char * const fh = |
84 | PL_op->op_type == OP_READDIR || |
8b5be85c |
85 | PL_op->op_type == OP_TELLDIR || |
86 | PL_op->op_type == OP_SEEKDIR || |
87 | PL_op->op_type == OP_REWINDDIR || |
88 | PL_op->op_type == OP_CLOSEDIR ? |
89 | "dirhandle" : "filehandle"; |
90 | Perl_croak(aTHX_ "Bad symbol for %s", fh); |
91 | } |
92 | |
5bd07a3d |
93 | if (!GvIOp(gv)) { |
7fb37951 |
94 | #ifdef GV_UNIQUE_CHECK |
95 | if (GvUNIQUE(gv)) { |
96 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); |
5bd07a3d |
97 | } |
98 | #endif |
a0d0e21e |
99 | GvIOp(gv) = newIO(); |
5bd07a3d |
100 | } |
a0d0e21e |
101 | return gv; |
102 | } |
103 | |
104 | GV * |
864dbfa3 |
105 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
106 | { |
97aff369 |
107 | dVAR; |
eacec437 |
108 | char smallbuf[256]; |
53d95988 |
109 | char *tmpbuf; |
8ebc5c01 |
110 | STRLEN tmplen; |
79072805 |
111 | GV *gv; |
112 | |
1d7c1841 |
113 | if (!PL_defstash) |
a0714e2c |
114 | return NULL; |
1d7c1841 |
115 | |
53d95988 |
116 | tmplen = strlen(name) + 2; |
117 | if (tmplen < sizeof smallbuf) |
118 | tmpbuf = smallbuf; |
119 | else |
a02a5408 |
120 | Newx(tmpbuf, tmplen + 1, char); |
0ac0412a |
121 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 |
122 | tmpbuf[0] = '_'; |
123 | tmpbuf[1] = '<'; |
490a0e98 |
124 | memcpy(tmpbuf + 2, name, tmplen - 1); |
3280af22 |
125 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
126 | if (!isGV(gv)) { |
3280af22 |
127 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 |
128 | #ifdef PERL_DONT_CREATE_GVSV |
129 | GvSV(gv) = newSVpvn(name, tmplen - 2); |
130 | #else |
131 | sv_setpvn(GvSV(gv), name, tmplen - 2); |
132 | #endif |
1d7c1841 |
133 | if (PERLDB_LINE) |
a0714e2c |
134 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); |
1d7c1841 |
135 | } |
53d95988 |
136 | if (tmpbuf != smallbuf) |
137 | Safefree(tmpbuf); |
79072805 |
138 | return gv; |
139 | } |
140 | |
62d55b22 |
141 | /* |
142 | =for apidoc gv_const_sv |
143 | |
144 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for |
145 | inlining, or C<gv> is a placeholder reference that would be promoted to such |
146 | a typeglob, then returns the value returned by the sub. Otherwise, returns |
147 | NULL. |
148 | |
149 | =cut |
150 | */ |
151 | |
152 | SV * |
153 | Perl_gv_const_sv(pTHX_ GV *gv) |
154 | { |
155 | if (SvTYPE(gv) == SVt_PVGV) |
156 | return cv_const_sv(GvCVu(gv)); |
157 | return SvROK(gv) ? SvRV(gv) : NULL; |
158 | } |
159 | |
463ee0b2 |
160 | void |
864dbfa3 |
161 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
162 | { |
27da23d5 |
163 | dVAR; |
463ee0b2 |
164 | register GP *gp; |
3b6733bf |
165 | const U32 old_type = SvTYPE(gv); |
166 | const bool doproto = old_type > SVt_NULL; |
b15aece3 |
167 | const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL; |
756cb477 |
168 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
169 | |
170 | assert (!(proto && has_constant)); |
171 | |
172 | if (has_constant) { |
5c1f4d79 |
173 | /* The constant has to be a simple scalar type. */ |
174 | switch (SvTYPE(has_constant)) { |
175 | case SVt_PVAV: |
176 | case SVt_PVHV: |
177 | case SVt_PVCV: |
178 | case SVt_PVFM: |
179 | case SVt_PVIO: |
180 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", |
181 | sv_reftype(has_constant, 0)); |
182 | } |
756cb477 |
183 | SvRV_set(gv, NULL); |
184 | SvROK_off(gv); |
185 | } |
463ee0b2 |
186 | |
3b6733bf |
187 | |
188 | if (old_type < SVt_PVGV) { |
189 | if (old_type >= SVt_PV) |
190 | SvCUR_set(gv, 0); |
191 | sv_upgrade((SV*)gv, SVt_PVGV); |
192 | } |
55d729e4 |
193 | if (SvLEN(gv)) { |
194 | if (proto) { |
f880fe2f |
195 | SvPV_set(gv, NULL); |
b162af07 |
196 | SvLEN_set(gv, 0); |
55d729e4 |
197 | SvPOK_off(gv); |
198 | } else |
94010e71 |
199 | Safefree(SvPVX_mutable(gv)); |
55d729e4 |
200 | } |
a02a5408 |
201 | Newxz(gp, 1, GP); |
f7877b28 |
202 | SvSCREAM_on(gv); |
8990e307 |
203 | GvGP(gv) = gp_ref(gp); |
c69033f2 |
204 | #ifdef PERL_DONT_CREATE_GVSV |
c445ea15 |
205 | GvSV(gv) = NULL; |
c69033f2 |
206 | #else |
561b68a9 |
207 | GvSV(gv) = newSV(0); |
c69033f2 |
208 | #endif |
1d7c1841 |
209 | GvLINE(gv) = CopLINE(PL_curcop); |
07409e01 |
210 | /* XXX Ideally this cast would be replaced with a change to const char* |
211 | in the struct. */ |
212 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) ""; |
005a453c |
213 | GvCVGEN(gv) = 0; |
463ee0b2 |
214 | GvEGV(gv) = gv; |
e15faf7d |
215 | GvSTASH(gv) = stash; |
216 | if (stash) |
217 | Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv); |
ae8cc45f |
218 | gv_name_set(gv, name, len, GV_ADD); |
23ad5bf5 |
219 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
220 | GvMULTI_on(gv); |
55d729e4 |
221 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
222 | SvIOK_off(gv); |
55d729e4 |
223 | ENTER; |
756cb477 |
224 | if (has_constant) { |
225 | /* newCONSTSUB takes ownership of the reference from us. */ |
226 | GvCV(gv) = newCONSTSUB(stash, name, has_constant); |
227 | } else { |
228 | /* XXX unsafe for threads if eval_owner isn't held */ |
229 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
230 | GvCV(gv) = PL_compcv; |
231 | } |
55d729e4 |
232 | LEAVE; |
233 | |
3280af22 |
234 | PL_sub_generation++; |
65c50114 |
235 | CvGV(GvCV(gv)) = gv; |
e0d088d0 |
236 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 |
237 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
238 | if (proto) { |
239 | sv_setpv((SV*)GvCV(gv), proto); |
240 | Safefree(proto); |
241 | } |
242 | } |
463ee0b2 |
243 | } |
244 | |
76e3520e |
245 | STATIC void |
cea2e8a9 |
246 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
247 | { |
248 | switch (sv_type) { |
249 | case SVt_PVIO: |
250 | (void)GvIOn(gv); |
251 | break; |
252 | case SVt_PVAV: |
253 | (void)GvAVn(gv); |
254 | break; |
255 | case SVt_PVHV: |
256 | (void)GvHVn(gv); |
257 | break; |
c69033f2 |
258 | #ifdef PERL_DONT_CREATE_GVSV |
259 | case SVt_NULL: |
260 | case SVt_PVCV: |
261 | case SVt_PVFM: |
e654831b |
262 | case SVt_PVGV: |
c69033f2 |
263 | break; |
264 | default: |
265 | (void)GvSVn(gv); |
266 | #endif |
a0d0e21e |
267 | } |
268 | } |
269 | |
954c1994 |
270 | /* |
271 | =for apidoc gv_fetchmeth |
272 | |
273 | Returns the glob with the given C<name> and a defined subroutine or |
274 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
275 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
276 | |
277 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
278 | side-effect creates a glob with the given C<name> in the given C<stash> |
279 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
280 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
281 | |
282 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
283 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
284 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
285 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
286 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
287 | |
288 | =cut |
289 | */ |
290 | |
79072805 |
291 | GV * |
864dbfa3 |
292 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
293 | { |
97aff369 |
294 | dVAR; |
79072805 |
295 | AV* av; |
463ee0b2 |
296 | GV* topgv; |
79072805 |
297 | GV* gv; |
463ee0b2 |
298 | GV** gvp; |
748a9306 |
299 | CV* cv; |
bfcb3514 |
300 | const char *hvname; |
a0d0e21e |
301 | |
af09ea45 |
302 | /* UNIVERSAL methods should be callable without a stash */ |
303 | if (!stash) { |
304 | level = -1; /* probably appropriate */ |
89529cee |
305 | if(!(stash = gv_stashpvs("UNIVERSAL", FALSE))) |
af09ea45 |
306 | return 0; |
307 | } |
308 | |
bfcb3514 |
309 | hvname = HvNAME_get(stash); |
310 | if (!hvname) |
e27ad1f2 |
311 | Perl_croak(aTHX_ |
312 | "Can't use anonymous symbol table for method lookup"); |
313 | |
44a8e56a |
314 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
315 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
bfcb3514 |
316 | name, hvname); |
463ee0b2 |
317 | |
bfcb3514 |
318 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a |
319 | |
320 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
321 | if (!gvp) |
a0714e2c |
322 | topgv = NULL; |
44a8e56a |
323 | else { |
324 | topgv = *gvp; |
325 | if (SvTYPE(topgv) != SVt_PVGV) |
326 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
327 | if ((cv = GvCV(topgv))) { |
44a8e56a |
328 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
329 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
330 | return topgv; |
44a8e56a |
331 | /* Stale cached entry: junk it */ |
332 | SvREFCNT_dec(cv); |
601f1833 |
333 | GvCV(topgv) = cv = NULL; |
44a8e56a |
334 | GvCVGEN(topgv) = 0; |
748a9306 |
335 | } |
3280af22 |
336 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
337 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
338 | } |
79072805 |
339 | |
017a3ce5 |
340 | gvp = (GV**)hv_fetchs(stash, "ISA", FALSE); |
7d49f689 |
341 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : NULL; |
9607fc9c |
342 | |
fb73857a |
343 | /* create and re-create @.*::SUPER::ISA on demand */ |
344 | if (!av || !SvMAGIC(av)) { |
7423f6db |
345 | STRLEN packlen = HvNAMELEN_get(stash); |
9607fc9c |
346 | |
bfcb3514 |
347 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { |
9607fc9c |
348 | HV* basestash; |
349 | |
350 | packlen -= 7; |
bfcb3514 |
351 | basestash = gv_stashpvn(hvname, packlen, TRUE); |
017a3ce5 |
352 | gvp = (GV**)hv_fetchs(basestash, "ISA", FALSE); |
3280af22 |
353 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
017a3ce5 |
354 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); |
9607fc9c |
355 | if (!gvp || !(gv = *gvp)) |
bfcb3514 |
356 | Perl_croak(aTHX_ "Cannot create %s::ISA", hvname); |
9607fc9c |
357 | if (SvTYPE(gv) != SVt_PVGV) |
358 | gv_init(gv, stash, "ISA", 3, TRUE); |
359 | SvREFCNT_dec(GvAV(gv)); |
b37c2d43 |
360 | GvAV(gv) = (AV*)SvREFCNT_inc_simple(av); |
9607fc9c |
361 | } |
362 | } |
363 | } |
364 | |
365 | if (av) { |
79072805 |
366 | SV** svp = AvARRAY(av); |
93965878 |
367 | /* NOTE: No support for tied ISA */ |
368 | I32 items = AvFILLp(av) + 1; |
79072805 |
369 | while (items--) { |
823a54a3 |
370 | SV* const sv = *svp++; |
371 | HV* const basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
372 | if (!basestash) { |
599cee73 |
373 | if (ckWARN(WARN_MISC)) |
35c1215d |
374 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA", |
bfcb3514 |
375 | sv, hvname); |
79072805 |
376 | continue; |
377 | } |
44a8e56a |
378 | gv = gv_fetchmeth(basestash, name, len, |
379 | (level >= 0) ? level + 1 : level - 1); |
380 | if (gv) |
381 | goto gotcha; |
79072805 |
382 | } |
383 | } |
a0d0e21e |
384 | |
9607fc9c |
385 | /* if at top level, try UNIVERSAL */ |
386 | |
44a8e56a |
387 | if (level == 0 || level == -1) { |
89529cee |
388 | HV* const lastchance = gv_stashpvs("UNIVERSAL", FALSE); |
9607fc9c |
389 | |
823a54a3 |
390 | if (lastchance) { |
155aba94 |
391 | if ((gv = gv_fetchmeth(lastchance, name, len, |
392 | (level >= 0) ? level + 1 : level - 1))) |
393 | { |
44a8e56a |
394 | gotcha: |
dc848c6f |
395 | /* |
396 | * Cache method in topgv if: |
397 | * 1. topgv has no synonyms (else inheritance crosses wires) |
398 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
399 | */ |
400 | if (topgv && |
401 | GvREFCNT(topgv) == 1 && |
402 | (cv = GvCV(gv)) && |
403 | (CvROOT(cv) || CvXSUB(cv))) |
404 | { |
155aba94 |
405 | if ((cv = GvCV(topgv))) |
44a8e56a |
406 | SvREFCNT_dec(cv); |
407 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
408 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
409 | } |
a0d0e21e |
410 | return gv; |
411 | } |
005a453c |
412 | else if (topgv && GvREFCNT(topgv) == 1) { |
413 | /* cache the fact that the method is not defined */ |
3280af22 |
414 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
415 | } |
a0d0e21e |
416 | } |
417 | } |
418 | |
79072805 |
419 | return 0; |
420 | } |
421 | |
954c1994 |
422 | /* |
611c1e95 |
423 | =for apidoc gv_fetchmeth_autoload |
424 | |
425 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. |
426 | Returns a glob for the subroutine. |
427 | |
428 | For an autoloaded subroutine without a GV, will create a GV even |
429 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() |
430 | of the result may be zero. |
431 | |
432 | =cut |
433 | */ |
434 | |
435 | GV * |
436 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
437 | { |
438 | GV *gv = gv_fetchmeth(stash, name, len, level); |
439 | |
440 | if (!gv) { |
611c1e95 |
441 | CV *cv; |
442 | GV **gvp; |
443 | |
444 | if (!stash) |
6136c704 |
445 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
5c7983e5 |
446 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
6136c704 |
447 | return NULL; |
5c7983e5 |
448 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 |
449 | return NULL; |
611c1e95 |
450 | cv = GvCV(gv); |
451 | if (!(CvROOT(cv) || CvXSUB(cv))) |
6136c704 |
452 | return NULL; |
611c1e95 |
453 | /* Have an autoload */ |
454 | if (level < 0) /* Cannot do without a stub */ |
455 | gv_fetchmeth(stash, name, len, 0); |
456 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
457 | if (!gvp) |
6136c704 |
458 | return NULL; |
611c1e95 |
459 | return *gvp; |
460 | } |
461 | return gv; |
462 | } |
463 | |
464 | /* |
954c1994 |
465 | =for apidoc gv_fetchmethod_autoload |
466 | |
467 | Returns the glob which contains the subroutine to call to invoke the method |
468 | on the C<stash>. In fact in the presence of autoloading this may be the |
469 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
470 | already setup. |
954c1994 |
471 | |
472 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
473 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
474 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
475 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
476 | with a non-zero C<autoload> parameter. |
954c1994 |
477 | |
478 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
479 | that if you want to keep the returned glob for a long time, you need to |
480 | check for it being "AUTOLOAD", since at the later time the call may load a |
481 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
482 | created via a side effect to do this. |
954c1994 |
483 | |
484 | These functions have the same side-effects and as C<gv_fetchmeth> with |
485 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
486 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
487 | C<call_sv> apply equally to these functions. |
954c1994 |
488 | |
489 | =cut |
490 | */ |
491 | |
dc848c6f |
492 | GV * |
864dbfa3 |
493 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
494 | { |
97aff369 |
495 | dVAR; |
08105a92 |
496 | register const char *nend; |
c445ea15 |
497 | const char *nsplit = NULL; |
a0d0e21e |
498 | GV* gv; |
0dae17bd |
499 | HV* ostash = stash; |
500 | |
501 | if (stash && SvTYPE(stash) < SVt_PVHV) |
5c284bb0 |
502 | stash = NULL; |
b267980d |
503 | |
463ee0b2 |
504 | for (nend = name; *nend; nend++) { |
9607fc9c |
505 | if (*nend == '\'') |
a0d0e21e |
506 | nsplit = nend; |
9607fc9c |
507 | else if (*nend == ':' && *(nend + 1) == ':') |
508 | nsplit = ++nend; |
a0d0e21e |
509 | } |
510 | if (nsplit) { |
9d4ba2ae |
511 | const char * const origname = name; |
a0d0e21e |
512 | name = nsplit + 1; |
a0d0e21e |
513 | if (*nsplit == ':') |
514 | --nsplit; |
9607fc9c |
515 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
516 | /* ->SUPER::method should really be looked up in original stash */ |
b37c2d43 |
517 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
518 | CopSTASHPV(PL_curcop))); |
af09ea45 |
519 | /* __PACKAGE__::SUPER stash should be autovivified */ |
b15aece3 |
520 | stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
521 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 |
522 | origname, HvNAME_get(stash), name) ); |
4633a7c4 |
523 | } |
e189a56d |
524 | else { |
af09ea45 |
525 | /* don't autovifify if ->NoSuchStash::method */ |
526 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); |
e189a56d |
527 | |
528 | /* however, explicit calls to Pkg::SUPER::method may |
529 | happen, and may require autovivification to work */ |
530 | if (!stash && (nsplit - origname) >= 7 && |
531 | strnEQ(nsplit - 7, "::SUPER", 7) && |
532 | gv_stashpvn(origname, nsplit - origname - 7, FALSE)) |
533 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
534 | } |
0dae17bd |
535 | ostash = stash; |
4633a7c4 |
536 | } |
537 | |
9607fc9c |
538 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
539 | if (!gv) { |
2f6e0fe7 |
540 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
541 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
542 | else if (autoload) |
0dae17bd |
543 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 |
544 | } |
dc848c6f |
545 | else if (autoload) { |
9d4ba2ae |
546 | CV* const cv = GvCV(gv); |
09280a33 |
547 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
548 | GV* stubgv; |
549 | GV* autogv; |
550 | |
551 | if (CvANON(cv)) |
552 | stubgv = gv; |
553 | else { |
554 | stubgv = CvGV(cv); |
555 | if (GvCV(stubgv) != cv) /* orphaned import */ |
556 | stubgv = gv; |
557 | } |
558 | autogv = gv_autoload4(GvSTASH(stubgv), |
559 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
560 | if (autogv) |
561 | gv = autogv; |
562 | } |
563 | } |
44a8e56a |
564 | |
565 | return gv; |
566 | } |
567 | |
568 | GV* |
864dbfa3 |
569 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
570 | { |
27da23d5 |
571 | dVAR; |
44a8e56a |
572 | GV* gv; |
573 | CV* cv; |
574 | HV* varstash; |
575 | GV* vargv; |
576 | SV* varsv; |
e1ec3a88 |
577 | const char *packname = ""; |
7423f6db |
578 | STRLEN packname_len; |
44a8e56a |
579 | |
5c7983e5 |
580 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
a0714e2c |
581 | return NULL; |
0dae17bd |
582 | if (stash) { |
583 | if (SvTYPE(stash) < SVt_PVHV) { |
e62f0680 |
584 | packname = SvPV_const((SV*)stash, packname_len); |
5c284bb0 |
585 | stash = NULL; |
0dae17bd |
586 | } |
587 | else { |
bfcb3514 |
588 | packname = HvNAME_get(stash); |
7423f6db |
589 | packname_len = HvNAMELEN_get(stash); |
0dae17bd |
590 | } |
591 | } |
5c7983e5 |
592 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c |
593 | return NULL; |
dc848c6f |
594 | cv = GvCV(gv); |
595 | |
adb5a9ae |
596 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c |
597 | return NULL; |
ed850460 |
598 | |
dc848c6f |
599 | /* |
600 | * Inheriting AUTOLOAD for non-methods works ... for now. |
601 | */ |
041457d9 |
602 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
603 | && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) |
604 | ) |
12bcd1a6 |
605 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f |
606 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd |
607 | packname, (int)len, name); |
44a8e56a |
608 | |
aed2304a |
609 | if (CvISXSUB(cv)) { |
adb5a9ae |
610 | /* rather than lookup/init $AUTOLOAD here |
611 | * only to have the XSUB do another lookup for $AUTOLOAD |
612 | * and split that value on the last '::', |
613 | * pass along the same data via some unused fields in the CV |
614 | */ |
615 | CvSTASH(cv) = stash; |
f880fe2f |
616 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 |
617 | SvCUR_set(cv, len); |
adb5a9ae |
618 | return gv; |
619 | } |
adb5a9ae |
620 | |
44a8e56a |
621 | /* |
622 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
623 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
624 | * use that, but for lack of anything better we will use the sub's |
625 | * original package to look up $AUTOLOAD. |
626 | */ |
627 | varstash = GvSTASH(CvGV(cv)); |
5c7983e5 |
628 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b |
629 | ENTER; |
630 | |
c69033f2 |
631 | if (!isGV(vargv)) { |
5c7983e5 |
632 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 |
633 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 |
634 | GvSV(vargv) = newSV(0); |
c69033f2 |
635 | #endif |
636 | } |
3d35f11b |
637 | LEAVE; |
e203899d |
638 | varsv = GvSVn(vargv); |
7423f6db |
639 | sv_setpvn(varsv, packname, packname_len); |
396482e1 |
640 | sv_catpvs(varsv, "::"); |
44a8e56a |
641 | sv_catpvn(varsv, name, len); |
642 | SvTAINTED_off(varsv); |
a0d0e21e |
643 | return gv; |
644 | } |
645 | |
d2c93421 |
646 | /* The "gv" parameter should be the glob known to Perl code as *! |
647 | * The scalar must already have been magicalized. |
648 | */ |
649 | STATIC void |
650 | S_require_errno(pTHX_ GV *gv) |
651 | { |
27da23d5 |
652 | dVAR; |
89529cee |
653 | HV* stash = gv_stashpvs("Errno", FALSE); |
d2c93421 |
654 | |
a0288114 |
655 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
d2c93421 |
656 | dSP; |
657 | PUTBACK; |
658 | ENTER; |
659 | save_scalar(gv); /* keep the value of $! */ |
84f1fa11 |
660 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
a0714e2c |
661 | newSVpvs("Errno"), NULL); |
d2c93421 |
662 | LEAVE; |
663 | SPAGAIN; |
89529cee |
664 | stash = gv_stashpvs("Errno", FALSE); |
d2c93421 |
665 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
666 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
667 | } |
668 | } |
669 | |
954c1994 |
670 | /* |
671 | =for apidoc gv_stashpv |
672 | |
386d01d6 |
673 | Returns a pointer to the stash for a specified package. C<name> should |
bc96cb06 |
674 | be a valid UTF-8 string and must be null-terminated. If C<create> is set |
675 | then the package will be created if it does not already exist. If C<create> |
676 | is not set and the package does not exist then NULL is returned. |
954c1994 |
677 | |
678 | =cut |
679 | */ |
680 | |
a0d0e21e |
681 | HV* |
864dbfa3 |
682 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
683 | { |
dc437b57 |
684 | return gv_stashpvn(name, strlen(name), create); |
685 | } |
686 | |
bc96cb06 |
687 | /* |
688 | =for apidoc gv_stashpvn |
689 | |
690 | Returns a pointer to the stash for a specified package. C<name> should |
691 | be a valid UTF-8 string. The C<namelen> parameter indicates the length of |
692 | the C<name>, in bytes. If C<create> is set then the package will be |
693 | created if it does not already exist. If C<create> is not set and the |
694 | package does not exist then NULL is returned. |
695 | |
696 | =cut |
697 | */ |
698 | |
dc437b57 |
699 | HV* |
864dbfa3 |
700 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
701 | { |
0cea0058 |
702 | char smallbuf[128]; |
46fc3d4c |
703 | char *tmpbuf; |
a0d0e21e |
704 | HV *stash; |
705 | GV *tmpgv; |
dc437b57 |
706 | |
46fc3d4c |
707 | if (namelen + 3 < sizeof smallbuf) |
708 | tmpbuf = smallbuf; |
709 | else |
a02a5408 |
710 | Newx(tmpbuf, namelen + 3, char); |
dc437b57 |
711 | Copy(name,tmpbuf,namelen,char); |
712 | tmpbuf[namelen++] = ':'; |
713 | tmpbuf[namelen++] = ':'; |
714 | tmpbuf[namelen] = '\0'; |
9fb9dfd8 |
715 | tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, create, SVt_PVHV); |
46fc3d4c |
716 | if (tmpbuf != smallbuf) |
717 | Safefree(tmpbuf); |
a0d0e21e |
718 | if (!tmpgv) |
719 | return 0; |
720 | if (!GvHV(tmpgv)) |
721 | GvHV(tmpgv) = newHV(); |
722 | stash = GvHV(tmpgv); |
bfcb3514 |
723 | if (!HvNAME_get(stash)) |
51a37f80 |
724 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e |
725 | return stash; |
463ee0b2 |
726 | } |
727 | |
954c1994 |
728 | /* |
729 | =for apidoc gv_stashsv |
730 | |
386d01d6 |
731 | Returns a pointer to the stash for a specified package, which must be a |
732 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
733 | |
734 | =cut |
735 | */ |
736 | |
a0d0e21e |
737 | HV* |
864dbfa3 |
738 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
739 | { |
dc437b57 |
740 | STRLEN len; |
9d4ba2ae |
741 | const char * const ptr = SvPV_const(sv,len); |
dc437b57 |
742 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
743 | } |
744 | |
745 | |
463ee0b2 |
746 | GV * |
7a5fd60d |
747 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { |
b7787f18 |
748 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d |
749 | } |
750 | |
751 | GV * |
752 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) { |
753 | STRLEN len; |
9d4ba2ae |
754 | const char * const nambeg = SvPV_const(name, len); |
7a5fd60d |
755 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
756 | } |
757 | |
758 | GV * |
759 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, |
760 | I32 sv_type) |
79072805 |
761 | { |
97aff369 |
762 | dVAR; |
08105a92 |
763 | register const char *name = nambeg; |
c445ea15 |
764 | register GV *gv = NULL; |
79072805 |
765 | GV**gvp; |
79072805 |
766 | I32 len; |
b3d904f3 |
767 | register const char *name_cursor; |
c445ea15 |
768 | HV *stash = NULL; |
add2581e |
769 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a |
770 | const I32 no_expand = flags & GV_NOEXPAND; |
fafc274c |
771 | const I32 add = |
772 | flags & ~SVf_UTF8 & ~GV_NOADD_NOINIT & ~GV_NOEXPAND & ~GV_NOTQUAL; |
b3d904f3 |
773 | const char *const name_end = nambeg + full_len; |
774 | const char *const name_em1 = name_end - 1; |
79072805 |
775 | |
fafc274c |
776 | if (flags & GV_NOTQUAL) { |
777 | /* Caller promised that there is no stash, so we can skip the check. */ |
778 | len = full_len; |
779 | goto no_stash; |
780 | } |
781 | |
b208e10c |
782 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
783 | /* accidental stringify on a GV? */ |
c07a80fd |
784 | name++; |
b208e10c |
785 | } |
c07a80fd |
786 | |
b3d904f3 |
787 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
788 | if ((*name_cursor == ':' && name_cursor < name_em1 |
789 | && name_cursor[1] == ':') |
790 | || (*name_cursor == '\'' && name_cursor[1])) |
463ee0b2 |
791 | { |
463ee0b2 |
792 | if (!stash) |
3280af22 |
793 | stash = PL_defstash; |
dc437b57 |
794 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
795 | return NULL; |
463ee0b2 |
796 | |
b3d904f3 |
797 | len = name_cursor - name; |
85e6fe83 |
798 | if (len > 0) { |
0cea0058 |
799 | char smallbuf[128]; |
62b57502 |
800 | char *tmpbuf; |
62b57502 |
801 | |
25c09a70 |
802 | if (len + 3 < sizeof (smallbuf)) |
3c78fafa |
803 | tmpbuf = smallbuf; |
62b57502 |
804 | else |
a02a5408 |
805 | Newx(tmpbuf, len+3, char); |
a0d0e21e |
806 | Copy(name, tmpbuf, len, char); |
807 | tmpbuf[len++] = ':'; |
808 | tmpbuf[len++] = ':'; |
809 | tmpbuf[len] = '\0'; |
463ee0b2 |
810 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
a0714e2c |
811 | gv = gvp ? *gvp : NULL; |
3280af22 |
812 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
813 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
814 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
815 | else |
816 | GvMULTI_on(gv); |
817 | } |
3c78fafa |
818 | if (tmpbuf != smallbuf) |
62b57502 |
819 | Safefree(tmpbuf); |
3280af22 |
820 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0714e2c |
821 | return NULL; |
85e6fe83 |
822 | |
463ee0b2 |
823 | if (!(stash = GvHV(gv))) |
824 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
825 | |
bfcb3514 |
826 | if (!HvNAME_get(stash)) |
b3d904f3 |
827 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); |
463ee0b2 |
828 | } |
829 | |
b3d904f3 |
830 | if (*name_cursor == ':') |
831 | name_cursor++; |
832 | name_cursor++; |
833 | name = name_cursor; |
ad6bfa9d |
834 | if (name == name_end) |
017a3ce5 |
835 | return gv ? gv : (GV*)*hv_fetchs(PL_defstash, "main::", TRUE); |
79072805 |
836 | } |
79072805 |
837 | } |
b3d904f3 |
838 | len = name_cursor - name; |
463ee0b2 |
839 | |
840 | /* No stash in name, so see how we can default */ |
841 | |
842 | if (!stash) { |
fafc274c |
843 | no_stash: |
8ccce9ae |
844 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c |
845 | bool global = FALSE; |
846 | |
8ccce9ae |
847 | switch (len) { |
848 | case 1: |
18ea00d7 |
849 | if (*name == '_') |
9d116dd7 |
850 | global = TRUE; |
18ea00d7 |
851 | break; |
8ccce9ae |
852 | case 3: |
853 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') |
854 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') |
855 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) |
9d116dd7 |
856 | global = TRUE; |
18ea00d7 |
857 | break; |
8ccce9ae |
858 | case 4: |
859 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
860 | && name[3] == 'V') |
9d116dd7 |
861 | global = TRUE; |
18ea00d7 |
862 | break; |
8ccce9ae |
863 | case 5: |
864 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' |
865 | && name[3] == 'I' && name[4] == 'N') |
463ee0b2 |
866 | global = TRUE; |
18ea00d7 |
867 | break; |
8ccce9ae |
868 | case 6: |
869 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') |
870 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') |
871 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) |
872 | global = TRUE; |
873 | break; |
874 | case 7: |
875 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
876 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' |
877 | && name[6] == 'T') |
18ea00d7 |
878 | global = TRUE; |
879 | break; |
463ee0b2 |
880 | } |
9607fc9c |
881 | |
463ee0b2 |
882 | if (global) |
3280af22 |
883 | stash = PL_defstash; |
923e4eb5 |
884 | else if (IN_PERL_COMPILETIME) { |
3280af22 |
885 | stash = PL_curstash; |
886 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
887 | sv_type != SVt_PVCV && |
888 | sv_type != SVt_PVGV && |
4633a7c4 |
889 | sv_type != SVt_PVFM && |
c07a80fd |
890 | sv_type != SVt_PVIO && |
70ec6265 |
891 | !(len == 1 && sv_type == SVt_PV && |
892 | (*name == 'a' || *name == 'b')) ) |
748a9306 |
893 | { |
4633a7c4 |
894 | gvp = (GV**)hv_fetch(stash,name,len,0); |
895 | if (!gvp || |
3280af22 |
896 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
897 | SvTYPE(*gvp) != SVt_PVGV) |
898 | { |
d4c19fe8 |
899 | stash = NULL; |
a5f75d66 |
900 | } |
155aba94 |
901 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
902 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
903 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
904 | { |
cea2e8a9 |
905 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
906 | sv_type == SVt_PVAV ? '@' : |
907 | sv_type == SVt_PVHV ? '%' : '$', |
908 | name); |
8ebc5c01 |
909 | if (GvCVu(*gvp)) |
cc507455 |
910 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
d4c19fe8 |
911 | stash = NULL; |
4633a7c4 |
912 | } |
a0d0e21e |
913 | } |
85e6fe83 |
914 | } |
463ee0b2 |
915 | else |
1d7c1841 |
916 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
917 | } |
918 | else |
3280af22 |
919 | stash = PL_defstash; |
463ee0b2 |
920 | } |
921 | |
922 | /* By this point we should have a stash and a name */ |
923 | |
a0d0e21e |
924 | if (!stash) { |
5a844595 |
925 | if (add) { |
9d4ba2ae |
926 | SV * const err = Perl_mess(aTHX_ |
5a844595 |
927 | "Global symbol \"%s%s\" requires explicit package name", |
928 | (sv_type == SVt_PV ? "$" |
929 | : sv_type == SVt_PVAV ? "@" |
930 | : sv_type == SVt_PVHV ? "%" |
608b3986 |
931 | : ""), name); |
932 | if (USE_UTF8_IN_NAMES) |
933 | SvUTF8_on(err); |
934 | qerror(err); |
9fb9dfd8 |
935 | stash = GvHV(gv_fetchpvn_flags("<none>::", 8, GV_ADDMULTI, SVt_PVHV)); |
a0d0e21e |
936 | } |
d7aacf4e |
937 | else |
a0714e2c |
938 | return NULL; |
a0d0e21e |
939 | } |
940 | |
941 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
942 | return NULL; |
a0d0e21e |
943 | |
79072805 |
944 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
945 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
a0714e2c |
946 | return NULL; |
79072805 |
947 | gv = *gvp; |
948 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
949 | if (add) { |
a5f75d66 |
950 | GvMULTI_on(gv); |
a0d0e21e |
951 | gv_init_sv(gv, sv_type); |
d2c93421 |
952 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
953 | require_errno(gv); |
a0d0e21e |
954 | } |
79072805 |
955 | return gv; |
add2581e |
956 | } else if (no_init) { |
55d729e4 |
957 | return gv; |
e26df76a |
958 | } else if (no_expand && SvROK(gv)) { |
959 | return gv; |
79072805 |
960 | } |
93a17b20 |
961 | |
962 | /* Adding a new symbol */ |
963 | |
0453d815 |
964 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d |
965 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 |
966 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
967 | gv_init_sv(gv, sv_type); |
93a17b20 |
968 | |
a0288114 |
969 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d |
970 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
971 | GvMULTI_on(gv) ; |
972 | |
93a17b20 |
973 | /* set up magic where warranted */ |
cc4c2da6 |
974 | if (len > 1) { |
9431620d |
975 | #ifndef EBCDIC |
cc4c2da6 |
976 | if (*name > 'V' ) { |
bb263b4e |
977 | /*EMPTY*/; |
cc4c2da6 |
978 | /* Nothing else to do. |
91f565cb |
979 | The compiler will probably turn the switch statement into a |
cc4c2da6 |
980 | branch table. Make sure we avoid even that small overhead for |
981 | the common case of lower case variable names. */ |
9431620d |
982 | } else |
983 | #endif |
984 | { |
b464bac0 |
985 | const char * const name2 = name + 1; |
cc4c2da6 |
986 | switch (*name) { |
987 | case 'A': |
988 | if (strEQ(name2, "RGV")) { |
989 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
990 | } |
991 | break; |
992 | case 'E': |
993 | if (strnEQ(name2, "XPORT", 5)) |
994 | GvMULTI_on(gv); |
995 | break; |
996 | case 'I': |
997 | if (strEQ(name2, "SA")) { |
9d4ba2ae |
998 | AV* const av = GvAVn(gv); |
cc4c2da6 |
999 | GvMULTI_on(gv); |
bd61b366 |
1000 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, NULL, 0); |
cc4c2da6 |
1001 | /* NOTE: No support for tied ISA */ |
1002 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
1003 | && AvFILLp(av) == -1) |
1004 | { |
e1ec3a88 |
1005 | const char *pname; |
cc4c2da6 |
1006 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
1007 | gv_stashpvn(pname, 9, TRUE); |
1008 | av_push(av, newSVpvn(pname = "DB_File",7)); |
1009 | gv_stashpvn(pname, 7, TRUE); |
1010 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
1011 | gv_stashpvn(pname, 9, TRUE); |
1012 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
1013 | gv_stashpvn(pname, 9, TRUE); |
1014 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
1015 | gv_stashpvn(pname, 9, TRUE); |
1016 | } |
1017 | } |
1018 | break; |
1019 | case 'O': |
1020 | if (strEQ(name2, "VERLOAD")) { |
9d4ba2ae |
1021 | HV* const hv = GvHVn(gv); |
cc4c2da6 |
1022 | GvMULTI_on(gv); |
a0714e2c |
1023 | hv_magic(hv, NULL, PERL_MAGIC_overload); |
cc4c2da6 |
1024 | } |
1025 | break; |
1026 | case 'S': |
1027 | if (strEQ(name2, "IG")) { |
1028 | HV *hv; |
1029 | I32 i; |
1030 | if (!PL_psig_ptr) { |
a02a5408 |
1031 | Newxz(PL_psig_ptr, SIG_SIZE, SV*); |
1032 | Newxz(PL_psig_name, SIG_SIZE, SV*); |
1033 | Newxz(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 |
1034 | } |
1035 | GvMULTI_on(gv); |
1036 | hv = GvHVn(gv); |
a0714e2c |
1037 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 |
1038 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 |
1039 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 |
1040 | if (init) |
1041 | sv_setsv(*init, &PL_sv_undef); |
1042 | PL_psig_ptr[i] = 0; |
1043 | PL_psig_name[i] = 0; |
1044 | PL_psig_pend[i] = 0; |
1045 | } |
1046 | } |
1047 | break; |
1048 | case 'V': |
1049 | if (strEQ(name2, "ERSION")) |
1050 | GvMULTI_on(gv); |
1051 | break; |
e5218da5 |
1052 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1053 | if (strEQ(name2, "HILD_ERROR_NATIVE")) |
1054 | goto magicalize; |
1055 | break; |
cc4c2da6 |
1056 | case '\005': /* $^ENCODING */ |
1057 | if (strEQ(name2, "NCODING")) |
1058 | goto magicalize; |
1059 | break; |
1060 | case '\017': /* $^OPEN */ |
1061 | if (strEQ(name2, "PEN")) |
1062 | goto magicalize; |
1063 | break; |
1064 | case '\024': /* ${^TAINT} */ |
1065 | if (strEQ(name2, "AINT")) |
1066 | goto ro_magicalize; |
1067 | break; |
7cebcbc0 |
1068 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 |
1069 | if (strEQ(name2, "NICODE")) |
cc4c2da6 |
1070 | goto ro_magicalize; |
a0288114 |
1071 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 |
1072 | goto ro_magicalize; |
e07ea26a |
1073 | if (strEQ(name2, "TF8CACHE")) |
1074 | goto magicalize; |
cc4c2da6 |
1075 | break; |
1076 | case '\027': /* $^WARNING_BITS */ |
1077 | if (strEQ(name2, "ARNING_BITS")) |
1078 | goto magicalize; |
1079 | break; |
1080 | case '1': |
1081 | case '2': |
1082 | case '3': |
1083 | case '4': |
1084 | case '5': |
1085 | case '6': |
1086 | case '7': |
1087 | case '8': |
1088 | case '9': |
85e6fe83 |
1089 | { |
cc4c2da6 |
1090 | /* ensures variable is only digits */ |
1091 | /* ${"1foo"} fails this test (and is thus writeable) */ |
1092 | /* added by japhy, but borrowed from is_gv_magical */ |
1093 | const char *end = name + len; |
1094 | while (--end > name) { |
1095 | if (!isDIGIT(*end)) return gv; |
1096 | } |
1097 | goto ro_magicalize; |
1d7c1841 |
1098 | } |
dc437b57 |
1099 | } |
93a17b20 |
1100 | } |
392db708 |
1101 | } else { |
1102 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will |
1103 | be case '\0' in this switch statement (ie a default case) */ |
cc4c2da6 |
1104 | switch (*name) { |
1105 | case '&': |
1106 | case '`': |
1107 | case '\'': |
1108 | if ( |
1109 | sv_type == SVt_PVAV || |
1110 | sv_type == SVt_PVHV || |
1111 | sv_type == SVt_PVCV || |
1112 | sv_type == SVt_PVFM || |
1113 | sv_type == SVt_PVIO |
1114 | ) { break; } |
1115 | PL_sawampersand = TRUE; |
1116 | goto ro_magicalize; |
1117 | |
1118 | case ':': |
c69033f2 |
1119 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 |
1120 | goto magicalize; |
1121 | |
1122 | case '?': |
ff0cee69 |
1123 | #ifdef COMPLEX_STATUS |
c69033f2 |
1124 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 |
1125 | #endif |
cc4c2da6 |
1126 | goto magicalize; |
ff0cee69 |
1127 | |
cc4c2da6 |
1128 | case '!': |
d2c93421 |
1129 | |
cc4c2da6 |
1130 | /* If %! has been used, automatically load Errno.pm. |
1131 | The require will itself set errno, so in order to |
1132 | preserve its value we have to set up the magic |
1133 | now (rather than going to magicalize) |
1134 | */ |
d2c93421 |
1135 | |
c69033f2 |
1136 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
1137 | |
cc4c2da6 |
1138 | if (sv_type == SVt_PVHV) |
1139 | require_errno(gv); |
d2c93421 |
1140 | |
6cef1e77 |
1141 | break; |
cc4c2da6 |
1142 | case '-': |
1143 | { |
9d4ba2ae |
1144 | AV* const av = GvAVn(gv); |
a0714e2c |
1145 | sv_magic((SV*)av, NULL, PERL_MAGIC_regdata, NULL, 0); |
03a27ae7 |
1146 | SvREADONLY_on(av); |
cc4c2da6 |
1147 | goto magicalize; |
1148 | } |
1149 | case '*': |
cc4c2da6 |
1150 | case '#': |
1151 | if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) |
1152 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
8ae1fe26 |
1153 | "$%c is no longer supported", *name); |
1154 | break; |
cc4c2da6 |
1155 | case '|': |
c69033f2 |
1156 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 |
1157 | goto magicalize; |
1158 | |
b3ca2e83 |
1159 | case '\010': /* $^H */ |
1160 | { |
1161 | HV *const hv = GvHVn(gv); |
1162 | hv_magic(hv, NULL, PERL_MAGIC_hints); |
1163 | } |
1164 | goto magicalize; |
1165 | |
cc4c2da6 |
1166 | case '+': |
1167 | { |
9d4ba2ae |
1168 | AV* const av = GvAVn(gv); |
bd61b366 |
1169 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, NULL, 0); |
03a27ae7 |
1170 | SvREADONLY_on(av); |
cc4c2da6 |
1171 | /* FALL THROUGH */ |
e521374c |
1172 | } |
cc4c2da6 |
1173 | case '\023': /* $^S */ |
1174 | case '1': |
1175 | case '2': |
1176 | case '3': |
1177 | case '4': |
1178 | case '5': |
1179 | case '6': |
1180 | case '7': |
1181 | case '8': |
1182 | case '9': |
1183 | ro_magicalize: |
c69033f2 |
1184 | SvREADONLY_on(GvSVn(gv)); |
cc4c2da6 |
1185 | /* FALL THROUGH */ |
1186 | case '[': |
1187 | case '^': |
1188 | case '~': |
1189 | case '=': |
1190 | case '%': |
1191 | case '.': |
1192 | case '(': |
1193 | case ')': |
1194 | case '<': |
1195 | case '>': |
1196 | case ',': |
1197 | case '\\': |
1198 | case '/': |
1199 | case '\001': /* $^A */ |
1200 | case '\003': /* $^C */ |
1201 | case '\004': /* $^D */ |
1202 | case '\005': /* $^E */ |
1203 | case '\006': /* $^F */ |
cc4c2da6 |
1204 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1205 | case '\016': /* $^N */ |
1206 | case '\017': /* $^O */ |
1207 | case '\020': /* $^P */ |
1208 | case '\024': /* $^T */ |
1209 | case '\027': /* $^W */ |
1210 | magicalize: |
c69033f2 |
1211 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
cc4c2da6 |
1212 | break; |
e521374c |
1213 | |
cc4c2da6 |
1214 | case '\014': /* $^L */ |
c69033f2 |
1215 | sv_setpvn(GvSVn(gv),"\f",1); |
1216 | PL_formfeed = GvSVn(gv); |
463ee0b2 |
1217 | break; |
cc4c2da6 |
1218 | case ';': |
c69033f2 |
1219 | sv_setpvn(GvSVn(gv),"\034",1); |
463ee0b2 |
1220 | break; |
cc4c2da6 |
1221 | case ']': |
1222 | { |
c69033f2 |
1223 | SV * const sv = GvSVn(gv); |
d7aa5382 |
1224 | if (!sv_derived_from(PL_patchlevel, "version")) |
7a5b473e |
1225 | upg_version(PL_patchlevel); |
7d54d38e |
1226 | GvSV(gv) = vnumify(PL_patchlevel); |
1227 | SvREADONLY_on(GvSV(gv)); |
1228 | SvREFCNT_dec(sv); |
93a17b20 |
1229 | } |
1230 | break; |
cc4c2da6 |
1231 | case '\026': /* $^V */ |
1232 | { |
c69033f2 |
1233 | SV * const sv = GvSVn(gv); |
f9be5ac8 |
1234 | GvSV(gv) = new_version(PL_patchlevel); |
1235 | SvREADONLY_on(GvSV(gv)); |
1236 | SvREFCNT_dec(sv); |
16070b82 |
1237 | } |
1238 | break; |
cc4c2da6 |
1239 | } |
79072805 |
1240 | } |
93a17b20 |
1241 | return gv; |
79072805 |
1242 | } |
1243 | |
1244 | void |
35a4481c |
1245 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1246 | { |
35a4481c |
1247 | const char *name; |
7423f6db |
1248 | STRLEN namelen; |
35a4481c |
1249 | const HV * const hv = GvSTASH(gv); |
43693395 |
1250 | if (!hv) { |
0c34ef67 |
1251 | SvOK_off(sv); |
43693395 |
1252 | return; |
1253 | } |
1254 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 |
1255 | |
bfcb3514 |
1256 | name = HvNAME_get(hv); |
7423f6db |
1257 | if (name) { |
1258 | namelen = HvNAMELEN_get(hv); |
1259 | } else { |
e27ad1f2 |
1260 | name = "__ANON__"; |
7423f6db |
1261 | namelen = 8; |
1262 | } |
a0288114 |
1263 | |
e27ad1f2 |
1264 | if (keepmain || strNE(name, "main")) { |
7423f6db |
1265 | sv_catpvn(sv,name,namelen); |
396482e1 |
1266 | sv_catpvs(sv,"::"); |
43693395 |
1267 | } |
257984c0 |
1268 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 |
1269 | } |
1270 | |
1271 | void |
35a4481c |
1272 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1273 | { |
46c461b5 |
1274 | const GV * const egv = GvEGV(gv); |
1275 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 |
1276 | } |
1277 | |
79072805 |
1278 | IO * |
864dbfa3 |
1279 | Perl_newIO(pTHX) |
79072805 |
1280 | { |
97aff369 |
1281 | dVAR; |
8990e307 |
1282 | GV *iogv; |
561b68a9 |
1283 | IO * const io = (IO*)newSV(0); |
8990e307 |
1284 | |
a0d0e21e |
1285 | sv_upgrade((SV *)io,SVt_PVIO); |
158623e7 |
1286 | /* This used to read SvREFCNT(io) = 1; |
1287 | It's not clear why the reference count needed an explicit reset. NWC |
1288 | */ |
1289 | assert (SvREFCNT(io) == 1); |
8990e307 |
1290 | SvOBJECT_on(io); |
b464bac0 |
1291 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 |
1292 | hv_clear(PL_stashcache); |
71315bf2 |
1293 | iogv = gv_fetchpvs("FileHandle::", 0, SVt_PVHV); |
5f2d631d |
1294 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1295 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
71315bf2 |
1296 | iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV); |
b162af07 |
1297 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 |
1298 | return io; |
1299 | } |
1300 | |
1301 | void |
864dbfa3 |
1302 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1303 | { |
97aff369 |
1304 | dVAR; |
79072805 |
1305 | register I32 i; |
463ee0b2 |
1306 | |
8990e307 |
1307 | if (!HvARRAY(stash)) |
1308 | return; |
a0d0e21e |
1309 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 |
1310 | const HE *entry; |
dc437b57 |
1311 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 |
1312 | register GV *gv; |
1313 | HV *hv; |
dc437b57 |
1314 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f |
1315 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e |
1316 | { |
19b6c847 |
1317 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1318 | gv_check(hv); /* nested package */ |
1319 | } |
dc437b57 |
1320 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 |
1321 | const char *file; |
dc437b57 |
1322 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1323 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1324 | continue; |
1d7c1841 |
1325 | file = GvFILE(gv); |
1326 | /* performance hack: if filename is absolute and it's a standard |
1327 | * module, don't bother warning */ |
6eb630b7 |
1328 | #ifdef MACOS_TRADITIONAL |
551405c4 |
1329 | # define LIB_COMPONENT ":lib:" |
6eb630b7 |
1330 | #else |
551405c4 |
1331 | # define LIB_COMPONENT "/lib/" |
6eb630b7 |
1332 | #endif |
551405c4 |
1333 | if (file |
1334 | && PERL_FILE_IS_ABSOLUTE(file) |
1335 | && (instr(file, LIB_COMPONENT) || instr(file, ".pm"))) |
1d7c1841 |
1336 | { |
8990e307 |
1337 | continue; |
1d7c1841 |
1338 | } |
1339 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1340 | #ifdef USE_ITHREADS |
dd374669 |
1341 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 |
1342 | #else |
1343 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1344 | #endif |
9014280d |
1345 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 |
1346 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 |
1347 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 |
1348 | } |
79072805 |
1349 | } |
1350 | } |
1351 | } |
1352 | |
1353 | GV * |
e1ec3a88 |
1354 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 |
1355 | { |
97aff369 |
1356 | dVAR; |
cea2e8a9 |
1357 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 |
1358 | GV_ADD, SVt_PVGV); |
79072805 |
1359 | } |
1360 | |
1361 | /* hopefully this is only called on local symbol table entries */ |
1362 | |
1363 | GP* |
864dbfa3 |
1364 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1365 | { |
97aff369 |
1366 | dVAR; |
1d7c1841 |
1367 | if (!gp) |
d4c19fe8 |
1368 | return NULL; |
79072805 |
1369 | gp->gp_refcnt++; |
44a8e56a |
1370 | if (gp->gp_cv) { |
1371 | if (gp->gp_cvgen) { |
1372 | /* multi-named GPs cannot be used for method cache */ |
1373 | SvREFCNT_dec(gp->gp_cv); |
601f1833 |
1374 | gp->gp_cv = NULL; |
44a8e56a |
1375 | gp->gp_cvgen = 0; |
1376 | } |
1377 | else { |
1378 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1379 | PL_sub_generation++; |
44a8e56a |
1380 | } |
1381 | } |
79072805 |
1382 | return gp; |
79072805 |
1383 | } |
1384 | |
1385 | void |
864dbfa3 |
1386 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1387 | { |
97aff369 |
1388 | dVAR; |
79072805 |
1389 | GP* gp; |
1390 | |
f7877b28 |
1391 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 |
1392 | return; |
f248d071 |
1393 | if (gp->gp_refcnt == 0) { |
1394 | if (ckWARN_d(WARN_INTERNAL)) |
9014280d |
1395 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc |
1396 | "Attempt to free unreferenced glob pointers" |
1397 | pTHX__FORMAT pTHX__VALUE); |
79072805 |
1398 | return; |
1399 | } |
44a8e56a |
1400 | if (gp->gp_cv) { |
1401 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1402 | PL_sub_generation++; |
44a8e56a |
1403 | } |
748a9306 |
1404 | if (--gp->gp_refcnt > 0) { |
1405 | if (gp->gp_egv == gv) |
1406 | gp->gp_egv = 0; |
dd38834b |
1407 | GvGP(gv) = 0; |
79072805 |
1408 | return; |
748a9306 |
1409 | } |
79072805 |
1410 | |
c9da69fb |
1411 | SvREFCNT_dec(gp->gp_sv); |
1412 | SvREFCNT_dec(gp->gp_av); |
bfcb3514 |
1413 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1414 | Somehow gp->gp_hv can end up pointing at freed garbage. */ |
1415 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { |
bfcb3514 |
1416 | const char *hvname = HvNAME_get(gp->gp_hv); |
1417 | if (PL_stashcache && hvname) |
7423f6db |
1418 | hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
1419 | G_DISCARD); |
bfcb3514 |
1420 | SvREFCNT_dec(gp->gp_hv); |
13207a71 |
1421 | } |
c9da69fb |
1422 | SvREFCNT_dec(gp->gp_io); |
1423 | SvREFCNT_dec(gp->gp_cv); |
1424 | SvREFCNT_dec(gp->gp_form); |
748a9306 |
1425 | |
79072805 |
1426 | Safefree(gp); |
1427 | GvGP(gv) = 0; |
1428 | } |
1429 | |
d460ef45 |
1430 | int |
1431 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1432 | { |
53c1dcc0 |
1433 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1434 | PERL_UNUSED_ARG(sv); |
dd374669 |
1435 | |
d460ef45 |
1436 | if (amtp && AMT_AMAGIC(amtp)) { |
1437 | int i; |
1438 | for (i = 1; i < NofAMmeth; i++) { |
53c1dcc0 |
1439 | CV * const cv = amtp->table[i]; |
b37c2d43 |
1440 | if (cv) { |
d460ef45 |
1441 | SvREFCNT_dec((SV *) cv); |
601f1833 |
1442 | amtp->table[i] = NULL; |
d460ef45 |
1443 | } |
1444 | } |
1445 | } |
1446 | return 0; |
1447 | } |
1448 | |
a0d0e21e |
1449 | /* Updates and caches the CV's */ |
1450 | |
1451 | bool |
864dbfa3 |
1452 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1453 | { |
97aff369 |
1454 | dVAR; |
53c1dcc0 |
1455 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
1456 | AMT * const amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1457 | AMT amt; |
a0d0e21e |
1458 | |
3280af22 |
1459 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1460 | && amtp->was_ok_sub == PL_sub_generation) |
eb160463 |
1461 | return (bool)AMT_OVERLOADED(amtp); |
14befaf4 |
1462 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e |
1463 | |
bfcb3514 |
1464 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e |
1465 | |
d460ef45 |
1466 | Zero(&amt,1,AMT); |
3280af22 |
1467 | amt.was_ok_am = PL_amagic_generation; |
1468 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1469 | amt.fallback = AMGfallNO; |
1470 | amt.flags = 0; |
1471 | |
a6006777 |
1472 | { |
32251b26 |
1473 | int filled = 0, have_ovl = 0; |
1474 | int i, lim = 1; |
a6006777 |
1475 | |
22c35a8c |
1476 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1477 | |
89ffc314 |
1478 | /* Try to find via inheritance. */ |
53c1dcc0 |
1479 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1480 | SV * const sv = gv ? GvSV(gv) : NULL; |
1481 | CV* cv; |
89ffc314 |
1482 | |
1483 | if (!gv) |
32251b26 |
1484 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 |
1485 | #ifdef PERL_DONT_CREATE_GVSV |
1486 | else if (!sv) { |
bb263b4e |
1487 | /*EMPTY*/; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 |
1488 | } |
1489 | #endif |
89ffc314 |
1490 | else if (SvTRUE(sv)) |
1491 | amt.fallback=AMGfallYES; |
1492 | else if (SvOK(sv)) |
1493 | amt.fallback=AMGfallNEVER; |
a6006777 |
1494 | |
32251b26 |
1495 | for (i = 1; i < lim; i++) |
601f1833 |
1496 | amt.table[i] = NULL; |
32251b26 |
1497 | for (; i < NofAMmeth; i++) { |
6136c704 |
1498 | const char * const cooky = PL_AMG_names[i]; |
32251b26 |
1499 | /* Human-readable form, for debugging: */ |
6136c704 |
1500 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
e1ec3a88 |
1501 | const STRLEN l = strlen(cooky); |
89ffc314 |
1502 | |
a0288114 |
1503 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1504 | cp, HvNAME_get(stash)) ); |
611c1e95 |
1505 | /* don't fill the cache while looking up! |
1506 | Creation of inheritance stubs in intermediate packages may |
1507 | conflict with the logic of runtime method substitution. |
1508 | Indeed, for inheritance A -> B -> C, if C overloads "+0", |
1509 | then we could have created stubs for "(+0" in A and C too. |
1510 | But if B overloads "bool", we may want to use it for |
1511 | numifying instead of C's "+0". */ |
1512 | if (i >= DESTROY_amg) |
1513 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); |
1514 | else /* Autoload taken care of below */ |
1515 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); |
46fc3d4c |
1516 | cv = 0; |
89ffc314 |
1517 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 |
1518 | const char *hvname; |
44a8e56a |
1519 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 |
1520 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 |
1521 | /* This is a hack to support autoloading..., while |
1522 | knowing *which* methods were declared as overloaded. */ |
44a8e56a |
1523 | /* GvSV contains the name of the method. */ |
6136c704 |
1524 | GV *ngv = NULL; |
c69033f2 |
1525 | SV *gvsv = GvSV(gv); |
a0288114 |
1526 | |
1527 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ |
1528 | "\" for overloaded \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1529 | GvSV(gv), cp, hvname) ); |
c69033f2 |
1530 | if (!gvsv || !SvPOK(gvsv) |
1531 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), |
dc848c6f |
1532 | FALSE))) |
1533 | { |
a0288114 |
1534 | /* Can be an import stub (created by "can"). */ |
c69033f2 |
1535 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
a0288114 |
1536 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1537 | "in package \"%.256s\"", |
35c1215d |
1538 | (GvCVGEN(gv) ? "Stub found while resolving" |
1539 | : "Can't resolve"), |
bfcb3514 |
1540 | name, cp, hvname); |
44a8e56a |
1541 | } |
dc848c6f |
1542 | cv = GvCV(gv = ngv); |
44a8e56a |
1543 | } |
b464bac0 |
1544 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 |
1545 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a |
1546 | GvNAME(CvGV(cv))) ); |
1547 | filled = 1; |
32251b26 |
1548 | if (i < DESTROY_amg) |
1549 | have_ovl = 1; |
611c1e95 |
1550 | } else if (gv) { /* Autoloaded... */ |
1551 | cv = (CV*)gv; |
1552 | filled = 1; |
44a8e56a |
1553 | } |
b37c2d43 |
1554 | amt.table[i]=(CV*)SvREFCNT_inc_simple(cv); |
a0d0e21e |
1555 | } |
a0d0e21e |
1556 | if (filled) { |
a6006777 |
1557 | AMT_AMAGIC_on(&amt); |
32251b26 |
1558 | if (have_ovl) |
1559 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1560 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1561 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1562 | return have_ovl; |
a0d0e21e |
1563 | } |
1564 | } |
a6006777 |
1565 | /* Here we have no table: */ |
9cbac4c7 |
1566 | /* no_table: */ |
a6006777 |
1567 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1568 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1569 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1570 | return FALSE; |
1571 | } |
1572 | |
32251b26 |
1573 | |
1574 | CV* |
1575 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1576 | { |
97aff369 |
1577 | dVAR; |
3f8f4626 |
1578 | MAGIC *mg; |
32251b26 |
1579 | AMT *amtp; |
1580 | |
bfcb3514 |
1581 | if (!stash || !HvNAME_get(stash)) |
601f1833 |
1582 | return NULL; |
14befaf4 |
1583 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1584 | if (!mg) { |
1585 | do_update: |
1586 | Gv_AMupdate(stash); |
14befaf4 |
1587 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1588 | } |
1589 | amtp = (AMT*)mg->mg_ptr; |
1590 | if ( amtp->was_ok_am != PL_amagic_generation |
1591 | || amtp->was_ok_sub != PL_sub_generation ) |
1592 | goto do_update; |
3ad83ce7 |
1593 | if (AMT_AMAGIC(amtp)) { |
b7787f18 |
1594 | CV * const ret = amtp->table[id]; |
3ad83ce7 |
1595 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1596 | /* Passing it through may have resulted in a warning |
1597 | "Inherited AUTOLOAD for a non-method deprecated", since |
1598 | our caller is going through a function call, not a method call. |
1599 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ |
890ce7af |
1600 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 |
1601 | |
1602 | if (gv && GvCV(gv)) |
1603 | return GvCV(gv); |
1604 | } |
1605 | return ret; |
1606 | } |
a0288114 |
1607 | |
601f1833 |
1608 | return NULL; |
32251b26 |
1609 | } |
1610 | |
1611 | |
a0d0e21e |
1612 | SV* |
864dbfa3 |
1613 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1614 | { |
27da23d5 |
1615 | dVAR; |
b267980d |
1616 | MAGIC *mg; |
9c5ffd7c |
1617 | CV *cv=NULL; |
a0d0e21e |
1618 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1619 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 |
1620 | int off = 0, off1, lr = 0, notfound = 0; |
1621 | int postpr = 0, force_cpy = 0; |
1622 | int assign = AMGf_assign & flags; |
1623 | const int assignshift = assign ? 1 : 0; |
497b47a8 |
1624 | #ifdef DEBUGGING |
1625 | int fl=0; |
497b47a8 |
1626 | #endif |
25716404 |
1627 | HV* stash=NULL; |
a0d0e21e |
1628 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 |
1629 | && (stash = SvSTASH(SvRV(left))) |
1630 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1631 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1632 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 |
1633 | : NULL)) |
b267980d |
1634 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1635 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1636 | * usual method */ |
497b47a8 |
1637 | ( |
1638 | #ifdef DEBUGGING |
1639 | fl = 1, |
a0288114 |
1640 | #endif |
497b47a8 |
1641 | cv = cvp[off=method])))) { |
a0d0e21e |
1642 | lr = -1; /* Call method for left argument */ |
1643 | } else { |
1644 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1645 | int logic; |
1646 | |
1647 | /* look for substituted methods */ |
ee239bfe |
1648 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1649 | switch (method) { |
1650 | case inc_amg: |
ee239bfe |
1651 | force_cpy = 1; |
1652 | if ((cv = cvp[off=add_ass_amg]) |
1653 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1654 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1655 | } |
1656 | break; |
1657 | case dec_amg: |
ee239bfe |
1658 | force_cpy = 1; |
1659 | if ((cv = cvp[off = subtr_ass_amg]) |
1660 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1661 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1662 | } |
1663 | break; |
1664 | case bool__amg: |
1665 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1666 | break; |
1667 | case numer_amg: |
1668 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1669 | break; |
1670 | case string_amg: |
1671 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1672 | break; |
b7787f18 |
1673 | case not_amg: |
1674 | (void)((cv = cvp[off=bool__amg]) |
1675 | || (cv = cvp[off=numer_amg]) |
1676 | || (cv = cvp[off=string_amg])); |
1677 | postpr = 1; |
1678 | break; |
748a9306 |
1679 | case copy_amg: |
1680 | { |
76e3520e |
1681 | /* |
1682 | * SV* ref causes confusion with the interpreter variable of |
1683 | * the same name |
1684 | */ |
890ce7af |
1685 | SV* const tmpRef=SvRV(left); |
76e3520e |
1686 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1687 | /* |
1688 | * Just to be extra cautious. Maybe in some |
1689 | * additional cases sv_setsv is safe, too. |
1690 | */ |
890ce7af |
1691 | SV* const newref = newSVsv(tmpRef); |
748a9306 |
1692 | SvOBJECT_on(newref); |
b162af07 |
1693 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 |
1694 | return newref; |
1695 | } |
1696 | } |
1697 | break; |
a0d0e21e |
1698 | case abs_amg: |
b267980d |
1699 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1700 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af |
1701 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1702 | if (off1==lt_amg) { |
890ce7af |
1703 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1704 | lt_amg,AMGf_noright); |
1705 | logic = SvTRUE(lessp); |
1706 | } else { |
890ce7af |
1707 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1708 | ncmp_amg,AMGf_noright); |
1709 | logic = (SvNV(lessp) < 0); |
1710 | } |
1711 | if (logic) { |
1712 | if (off==subtr_amg) { |
1713 | right = left; |
748a9306 |
1714 | left = nullsv; |
a0d0e21e |
1715 | lr = 1; |
1716 | } |
1717 | } else { |
1718 | return left; |
1719 | } |
1720 | } |
1721 | break; |
1722 | case neg_amg: |
155aba94 |
1723 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1724 | right = left; |
1725 | left = sv_2mortal(newSViv(0)); |
1726 | lr = 1; |
1727 | } |
1728 | break; |
f216259d |
1729 | case int_amg: |
f5284f61 |
1730 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1731 | /* FAIL safe */ |
1732 | return NULL; /* Delegate operation to standard mechanisms. */ |
1733 | break; |
f5284f61 |
1734 | case to_sv_amg: |
1735 | case to_av_amg: |
1736 | case to_hv_amg: |
1737 | case to_gv_amg: |
1738 | case to_cv_amg: |
1739 | /* FAIL safe */ |
b267980d |
1740 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1741 | break; |
a0d0e21e |
1742 | default: |
1743 | goto not_found; |
1744 | } |
1745 | if (!cv) goto not_found; |
1746 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
25716404 |
1747 | && (stash = SvSTASH(SvRV(right))) |
1748 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1749 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1750 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 |
1751 | : NULL)) |
a0d0e21e |
1752 | && (cv = cvp[off=method])) { /* Method for right |
1753 | * argument found */ |
1754 | lr=1; |
b267980d |
1755 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1756 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1757 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1758 | && !(flags & AMGf_unary)) { |
1759 | /* We look for substitution for |
1760 | * comparison operations and |
fc36a67e |
1761 | * concatenation */ |
a0d0e21e |
1762 | if (method==concat_amg || method==concat_ass_amg |
1763 | || method==repeat_amg || method==repeat_ass_amg) { |
1764 | return NULL; /* Delegate operation to string conversion */ |
1765 | } |
1766 | off = -1; |
1767 | switch (method) { |
1768 | case lt_amg: |
1769 | case le_amg: |
1770 | case gt_amg: |
1771 | case ge_amg: |
1772 | case eq_amg: |
1773 | case ne_amg: |
1774 | postpr = 1; off=ncmp_amg; break; |
1775 | case slt_amg: |
1776 | case sle_amg: |
1777 | case sgt_amg: |
1778 | case sge_amg: |
1779 | case seq_amg: |
1780 | case sne_amg: |
1781 | postpr = 1; off=scmp_amg; break; |
1782 | } |
1783 | if (off != -1) cv = cvp[off]; |
1784 | if (!cv) { |
1785 | goto not_found; |
1786 | } |
1787 | } else { |
a6006777 |
1788 | not_found: /* No method found, either report or croak */ |
b267980d |
1789 | switch (method) { |
1790 | case to_sv_amg: |
1791 | case to_av_amg: |
1792 | case to_hv_amg: |
1793 | case to_gv_amg: |
1794 | case to_cv_amg: |
1795 | /* FAIL safe */ |
1796 | return left; /* Delegate operation to standard mechanisms. */ |
1797 | break; |
1798 | } |
a0d0e21e |
1799 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1800 | notfound = 1; lr = -1; |
1801 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1802 | notfound = 1; lr = 1; |
1803 | } else { |
46fc3d4c |
1804 | SV *msg; |
774d564b |
1805 | if (off==-1) off=method; |
b267980d |
1806 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 |
1807 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 |
1808 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1809 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1810 | SvAMAGIC(left)? |
a0d0e21e |
1811 | "in overloaded package ": |
1812 | "has no overloaded magic", |
b267980d |
1813 | SvAMAGIC(left)? |
bfcb3514 |
1814 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e |
1815 | "", |
b267980d |
1816 | SvAMAGIC(right)? |
e7ea3e70 |
1817 | ",\n\tright argument in overloaded package ": |
b267980d |
1818 | (flags & AMGf_unary |
e7ea3e70 |
1819 | ? "" |
1820 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1821 | SvAMAGIC(right)? |
bfcb3514 |
1822 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c |
1823 | "")); |
a0d0e21e |
1824 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 |
1825 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e |
1826 | } else { |
894356b3 |
1827 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1828 | } |
1829 | return NULL; |
1830 | } |
ee239bfe |
1831 | force_cpy = force_cpy || assign; |
a0d0e21e |
1832 | } |
1833 | } |
497b47a8 |
1834 | #ifdef DEBUGGING |
a0d0e21e |
1835 | if (!notfound) { |
497b47a8 |
1836 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 |
1837 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 |
1838 | AMG_id2name(off), |
1839 | method+assignshift==off? "" : |
a0288114 |
1840 | " (initially \"", |
497b47a8 |
1841 | method+assignshift==off? "" : |
1842 | AMG_id2name(method+assignshift), |
a0288114 |
1843 | method+assignshift==off? "" : "\")", |
497b47a8 |
1844 | flags & AMGf_unary? "" : |
1845 | lr==1 ? " for right argument": " for left argument", |
1846 | flags & AMGf_unary? " for argument" : "", |
bfcb3514 |
1847 | stash ? HvNAME_get(stash) : "null", |
497b47a8 |
1848 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1849 | } |
497b47a8 |
1850 | #endif |
748a9306 |
1851 | /* Since we use shallow copy during assignment, we need |
1852 | * to dublicate the contents, probably calling user-supplied |
1853 | * version of copy operator |
1854 | */ |
ee239bfe |
1855 | /* We need to copy in following cases: |
1856 | * a) Assignment form was called. |
1857 | * assignshift==1, assign==T, method + 1 == off |
1858 | * b) Increment or decrement, called directly. |
1859 | * assignshift==0, assign==0, method + 0 == off |
1860 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1861 | * assignshift==0, assign==T, |
ee239bfe |
1862 | * force_cpy == T |
1863 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1864 | * assignshift==0, assign==0, |
ee239bfe |
1865 | * force_cpy == T |
1866 | * e) Assignment form translated to nomethod. |
1867 | * assignshift==1, assign==T, method + 1 != off |
1868 | * force_cpy == T |
1869 | */ |
1870 | /* off is method, method+assignshift, or a result of opcode substitution. |
1871 | * In the latter case assignshift==0, so only notfound case is important. |
1872 | */ |
1873 | if (( (method + assignshift == off) |
1874 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1875 | || force_cpy) |
1876 | RvDEEPCP(left); |
a0d0e21e |
1877 | { |
1878 | dSP; |
1879 | BINOP myop; |
1880 | SV* res; |
b7787f18 |
1881 | const bool oldcatch = CATCH_GET; |
a0d0e21e |
1882 | |
54310121 |
1883 | CATCH_SET(TRUE); |
a0d0e21e |
1884 | Zero(&myop, 1, BINOP); |
1885 | myop.op_last = (OP *) &myop; |
b37c2d43 |
1886 | myop.op_next = NULL; |
54310121 |
1887 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1888 | |
e788e7d3 |
1889 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1890 | ENTER; |
462e5cf6 |
1891 | SAVEOP(); |
533c011a |
1892 | PL_op = (OP *) &myop; |
3280af22 |
1893 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1894 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1895 | PUTBACK; |
cea2e8a9 |
1896 | pp_pushmark(); |
a0d0e21e |
1897 | |
924508f0 |
1898 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1899 | PUSHs(lr>0? right: left); |
1900 | PUSHs(lr>0? left: right); |
3280af22 |
1901 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1902 | if (notfound) { |
89ffc314 |
1903 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1904 | } |
1905 | PUSHs((SV*)cv); |
1906 | PUTBACK; |
1907 | |
155aba94 |
1908 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1909 | CALLRUNOPS(aTHX); |
a0d0e21e |
1910 | LEAVE; |
1911 | SPAGAIN; |
1912 | |
1913 | res=POPs; |
ebafeae7 |
1914 | PUTBACK; |
d3acc0f7 |
1915 | POPSTACK; |
54310121 |
1916 | CATCH_SET(oldcatch); |
a0d0e21e |
1917 | |
a0d0e21e |
1918 | if (postpr) { |
b7787f18 |
1919 | int ans; |
a0d0e21e |
1920 | switch (method) { |
1921 | case le_amg: |
1922 | case sle_amg: |
1923 | ans=SvIV(res)<=0; break; |
1924 | case lt_amg: |
1925 | case slt_amg: |
1926 | ans=SvIV(res)<0; break; |
1927 | case ge_amg: |
1928 | case sge_amg: |
1929 | ans=SvIV(res)>=0; break; |
1930 | case gt_amg: |
1931 | case sgt_amg: |
1932 | ans=SvIV(res)>0; break; |
1933 | case eq_amg: |
1934 | case seq_amg: |
1935 | ans=SvIV(res)==0; break; |
1936 | case ne_amg: |
1937 | case sne_amg: |
1938 | ans=SvIV(res)!=0; break; |
1939 | case inc_amg: |
1940 | case dec_amg: |
bbce6d69 |
1941 | SvSetSV(left,res); return left; |
dc437b57 |
1942 | case not_amg: |
fe7ac86a |
1943 | ans=!SvTRUE(res); break; |
b7787f18 |
1944 | default: |
1945 | ans=0; break; |
a0d0e21e |
1946 | } |
54310121 |
1947 | return boolSV(ans); |
748a9306 |
1948 | } else if (method==copy_amg) { |
1949 | if (!SvROK(res)) { |
cea2e8a9 |
1950 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1951 | } |
1952 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1953 | } else { |
1954 | return res; |
1955 | } |
1956 | } |
1957 | } |
c9d5ac95 |
1958 | |
1959 | /* |
7fc63493 |
1960 | =for apidoc is_gv_magical_sv |
c9d5ac95 |
1961 | |
7a5fd60d |
1962 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
1963 | |
1964 | =cut |
1965 | */ |
1966 | |
1967 | bool |
1968 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) |
1969 | { |
1970 | STRLEN len; |
b64e5050 |
1971 | const char * const temp = SvPV_const(name, len); |
7a5fd60d |
1972 | return is_gv_magical(temp, len, flags); |
1973 | } |
1974 | |
1975 | /* |
1976 | =for apidoc is_gv_magical |
1977 | |
c9d5ac95 |
1978 | Returns C<TRUE> if given the name of a magical GV. |
1979 | |
1980 | Currently only useful internally when determining if a GV should be |
1981 | created even in rvalue contexts. |
1982 | |
1983 | C<flags> is not used at present but available for future extension to |
1984 | allow selecting particular classes of magical variable. |
1985 | |
b9b0e72c |
1986 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
1987 | This assumption is met by all callers within the perl core, which all pass |
1988 | pointers returned by SvPV. |
1989 | |
c9d5ac95 |
1990 | =cut |
1991 | */ |
1992 | bool |
7fc63493 |
1993 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 |
1994 | { |
b37c2d43 |
1995 | PERL_UNUSED_CONTEXT; |
9d4ba2ae |
1996 | PERL_UNUSED_ARG(flags); |
1997 | |
b9b0e72c |
1998 | if (len > 1) { |
b464bac0 |
1999 | const char * const name1 = name + 1; |
b9b0e72c |
2000 | switch (*name) { |
2001 | case 'I': |
9431620d |
2002 | if (len == 3 && name1[1] == 'S' && name[2] == 'A') |
b9b0e72c |
2003 | goto yes; |
2004 | break; |
2005 | case 'O': |
9431620d |
2006 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c |
2007 | goto yes; |
2008 | break; |
2009 | case 'S': |
9431620d |
2010 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c |
2011 | goto yes; |
2012 | break; |
2013 | /* Using ${^...} variables is likely to be sufficiently rare that |
2014 | it seems sensible to avoid the space hit of also checking the |
2015 | length. */ |
2016 | case '\017': /* ${^OPEN} */ |
9431620d |
2017 | if (strEQ(name1, "PEN")) |
b9b0e72c |
2018 | goto yes; |
2019 | break; |
2020 | case '\024': /* ${^TAINT} */ |
9431620d |
2021 | if (strEQ(name1, "AINT")) |
b9b0e72c |
2022 | goto yes; |
2023 | break; |
2024 | case '\025': /* ${^UNICODE} */ |
9431620d |
2025 | if (strEQ(name1, "NICODE")) |
b9b0e72c |
2026 | goto yes; |
a0288114 |
2027 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 |
2028 | goto yes; |
b9b0e72c |
2029 | break; |
2030 | case '\027': /* ${^WARNING_BITS} */ |
9431620d |
2031 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c |
2032 | goto yes; |
2033 | break; |
2034 | case '1': |
2035 | case '2': |
2036 | case '3': |
2037 | case '4': |
2038 | case '5': |
2039 | case '6': |
2040 | case '7': |
2041 | case '8': |
2042 | case '9': |
c9d5ac95 |
2043 | { |
7fc63493 |
2044 | const char *end = name + len; |
c9d5ac95 |
2045 | while (--end > name) { |
2046 | if (!isDIGIT(*end)) |
2047 | return FALSE; |
2048 | } |
b9b0e72c |
2049 | goto yes; |
2050 | } |
2051 | } |
2052 | } else { |
2053 | /* Because we're already assuming that name is NUL terminated |
2054 | below, we can treat an empty name as "\0" */ |
2055 | switch (*name) { |
2056 | case '&': |
2057 | case '`': |
2058 | case '\'': |
2059 | case ':': |
2060 | case '?': |
2061 | case '!': |
2062 | case '-': |
2063 | case '#': |
2064 | case '[': |
2065 | case '^': |
2066 | case '~': |
2067 | case '=': |
2068 | case '%': |
2069 | case '.': |
2070 | case '(': |
2071 | case ')': |
2072 | case '<': |
2073 | case '>': |
2074 | case ',': |
2075 | case '\\': |
2076 | case '/': |
2077 | case '|': |
2078 | case '+': |
2079 | case ';': |
2080 | case ']': |
2081 | case '\001': /* $^A */ |
2082 | case '\003': /* $^C */ |
2083 | case '\004': /* $^D */ |
2084 | case '\005': /* $^E */ |
2085 | case '\006': /* $^F */ |
2086 | case '\010': /* $^H */ |
2087 | case '\011': /* $^I, NOT \t in EBCDIC */ |
2088 | case '\014': /* $^L */ |
2089 | case '\016': /* $^N */ |
2090 | case '\017': /* $^O */ |
2091 | case '\020': /* $^P */ |
2092 | case '\023': /* $^S */ |
2093 | case '\024': /* $^T */ |
2094 | case '\026': /* $^V */ |
2095 | case '\027': /* $^W */ |
2096 | case '1': |
2097 | case '2': |
2098 | case '3': |
2099 | case '4': |
2100 | case '5': |
2101 | case '6': |
2102 | case '7': |
2103 | case '8': |
2104 | case '9': |
2105 | yes: |
2106 | return TRUE; |
2107 | default: |
2108 | break; |
c9d5ac95 |
2109 | } |
c9d5ac95 |
2110 | } |
2111 | return FALSE; |
2112 | } |
66610fdd |
2113 | |
f5c1e807 |
2114 | void |
2115 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) |
2116 | { |
2117 | dVAR; |
acda4c6a |
2118 | U32 hash; |
f5c1e807 |
2119 | |
2120 | PERL_UNUSED_ARG(flags); |
2121 | |
acda4c6a |
2122 | if (len > I32_MAX) |
2123 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); |
2124 | |
ae8cc45f |
2125 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2126 | unshare_hek(GvNAME_HEK(gv)); |
2127 | } |
2128 | |
acda4c6a |
2129 | PERL_HASH(hash, name, len); |
69ecfd12 |
2130 | GvNAME_HEK(gv) = name ? share_hek(name, len, hash) : 0; |
f5c1e807 |
2131 | } |
2132 | |
66610fdd |
2133 | /* |
2134 | * Local variables: |
2135 | * c-indentation-style: bsd |
2136 | * c-basic-offset: 4 |
2137 | * indent-tabs-mode: t |
2138 | * End: |
2139 | * |
37442d52 |
2140 | * ex: set ts=8 sts=4 sw=4 noet: |
2141 | */ |