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 | */ |
83 | const char *fh = PL_op->op_type == OP_READDIR || |
84 | PL_op->op_type == OP_TELLDIR || |
85 | PL_op->op_type == OP_SEEKDIR || |
86 | PL_op->op_type == OP_REWINDDIR || |
87 | PL_op->op_type == OP_CLOSEDIR ? |
88 | "dirhandle" : "filehandle"; |
89 | Perl_croak(aTHX_ "Bad symbol for %s", fh); |
90 | } |
91 | |
5bd07a3d |
92 | if (!GvIOp(gv)) { |
7fb37951 |
93 | #ifdef GV_UNIQUE_CHECK |
94 | if (GvUNIQUE(gv)) { |
95 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); |
5bd07a3d |
96 | } |
97 | #endif |
a0d0e21e |
98 | GvIOp(gv) = newIO(); |
5bd07a3d |
99 | } |
a0d0e21e |
100 | return gv; |
101 | } |
102 | |
103 | GV * |
864dbfa3 |
104 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
105 | { |
97aff369 |
106 | dVAR; |
eacec437 |
107 | char smallbuf[256]; |
53d95988 |
108 | char *tmpbuf; |
8ebc5c01 |
109 | STRLEN tmplen; |
79072805 |
110 | GV *gv; |
111 | |
1d7c1841 |
112 | if (!PL_defstash) |
a0714e2c |
113 | return NULL; |
1d7c1841 |
114 | |
53d95988 |
115 | tmplen = strlen(name) + 2; |
116 | if (tmplen < sizeof smallbuf) |
117 | tmpbuf = smallbuf; |
118 | else |
a02a5408 |
119 | Newx(tmpbuf, tmplen + 1, char); |
0ac0412a |
120 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 |
121 | tmpbuf[0] = '_'; |
122 | tmpbuf[1] = '<'; |
490a0e98 |
123 | memcpy(tmpbuf + 2, name, tmplen - 1); |
3280af22 |
124 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
125 | if (!isGV(gv)) { |
3280af22 |
126 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 |
127 | #ifdef PERL_DONT_CREATE_GVSV |
128 | GvSV(gv) = newSVpvn(name, tmplen - 2); |
129 | #else |
130 | sv_setpvn(GvSV(gv), name, tmplen - 2); |
131 | #endif |
1d7c1841 |
132 | if (PERLDB_LINE) |
a0714e2c |
133 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); |
1d7c1841 |
134 | } |
53d95988 |
135 | if (tmpbuf != smallbuf) |
136 | Safefree(tmpbuf); |
79072805 |
137 | return gv; |
138 | } |
139 | |
62d55b22 |
140 | /* |
141 | =for apidoc gv_const_sv |
142 | |
143 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for |
144 | inlining, or C<gv> is a placeholder reference that would be promoted to such |
145 | a typeglob, then returns the value returned by the sub. Otherwise, returns |
146 | NULL. |
147 | |
148 | =cut |
149 | */ |
150 | |
151 | SV * |
152 | Perl_gv_const_sv(pTHX_ GV *gv) |
153 | { |
154 | if (SvTYPE(gv) == SVt_PVGV) |
155 | return cv_const_sv(GvCVu(gv)); |
156 | return SvROK(gv) ? SvRV(gv) : NULL; |
157 | } |
158 | |
463ee0b2 |
159 | void |
864dbfa3 |
160 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
161 | { |
27da23d5 |
162 | dVAR; |
463ee0b2 |
163 | register GP *gp; |
e1ec3a88 |
164 | const bool doproto = SvTYPE(gv) > SVt_NULL; |
b15aece3 |
165 | const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL; |
756cb477 |
166 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
167 | |
168 | assert (!(proto && has_constant)); |
169 | |
170 | if (has_constant) { |
5c1f4d79 |
171 | /* The constant has to be a simple scalar type. */ |
172 | switch (SvTYPE(has_constant)) { |
173 | case SVt_PVAV: |
174 | case SVt_PVHV: |
175 | case SVt_PVCV: |
176 | case SVt_PVFM: |
177 | case SVt_PVIO: |
178 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", |
179 | sv_reftype(has_constant, 0)); |
180 | } |
756cb477 |
181 | SvRV_set(gv, NULL); |
182 | SvROK_off(gv); |
183 | } |
463ee0b2 |
184 | |
dc437b57 |
185 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
186 | if (SvLEN(gv)) { |
187 | if (proto) { |
f880fe2f |
188 | SvPV_set(gv, NULL); |
b162af07 |
189 | SvLEN_set(gv, 0); |
55d729e4 |
190 | SvPOK_off(gv); |
191 | } else |
94010e71 |
192 | Safefree(SvPVX_mutable(gv)); |
55d729e4 |
193 | } |
a02a5408 |
194 | Newxz(gp, 1, GP); |
8990e307 |
195 | GvGP(gv) = gp_ref(gp); |
c69033f2 |
196 | #ifdef PERL_DONT_CREATE_GVSV |
c445ea15 |
197 | GvSV(gv) = NULL; |
c69033f2 |
198 | #else |
561b68a9 |
199 | GvSV(gv) = newSV(0); |
c69033f2 |
200 | #endif |
1d7c1841 |
201 | GvLINE(gv) = CopLINE(PL_curcop); |
07409e01 |
202 | /* XXX Ideally this cast would be replaced with a change to const char* |
203 | in the struct. */ |
204 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) ""; |
005a453c |
205 | GvCVGEN(gv) = 0; |
463ee0b2 |
206 | GvEGV(gv) = gv; |
bd61b366 |
207 | sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, NULL, 0); |
e15faf7d |
208 | GvSTASH(gv) = stash; |
209 | if (stash) |
210 | Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv); |
a0d0e21e |
211 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
212 | GvNAMELEN(gv) = len; |
23ad5bf5 |
213 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
214 | GvMULTI_on(gv); |
55d729e4 |
215 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
216 | SvIOK_off(gv); |
55d729e4 |
217 | ENTER; |
756cb477 |
218 | if (has_constant) { |
219 | /* newCONSTSUB takes ownership of the reference from us. */ |
220 | GvCV(gv) = newCONSTSUB(stash, name, has_constant); |
221 | } else { |
222 | /* XXX unsafe for threads if eval_owner isn't held */ |
223 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
224 | GvCV(gv) = PL_compcv; |
225 | } |
55d729e4 |
226 | LEAVE; |
227 | |
3280af22 |
228 | PL_sub_generation++; |
65c50114 |
229 | CvGV(GvCV(gv)) = gv; |
e0d088d0 |
230 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 |
231 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
232 | if (proto) { |
233 | sv_setpv((SV*)GvCV(gv), proto); |
234 | Safefree(proto); |
235 | } |
236 | } |
463ee0b2 |
237 | } |
238 | |
76e3520e |
239 | STATIC void |
cea2e8a9 |
240 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
241 | { |
242 | switch (sv_type) { |
243 | case SVt_PVIO: |
244 | (void)GvIOn(gv); |
245 | break; |
246 | case SVt_PVAV: |
247 | (void)GvAVn(gv); |
248 | break; |
249 | case SVt_PVHV: |
250 | (void)GvHVn(gv); |
251 | break; |
c69033f2 |
252 | #ifdef PERL_DONT_CREATE_GVSV |
253 | case SVt_NULL: |
254 | case SVt_PVCV: |
255 | case SVt_PVFM: |
e654831b |
256 | case SVt_PVGV: |
c69033f2 |
257 | break; |
258 | default: |
259 | (void)GvSVn(gv); |
260 | #endif |
a0d0e21e |
261 | } |
262 | } |
263 | |
954c1994 |
264 | /* |
265 | =for apidoc gv_fetchmeth |
266 | |
267 | Returns the glob with the given C<name> and a defined subroutine or |
268 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
269 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
270 | |
271 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
272 | side-effect creates a glob with the given C<name> in the given C<stash> |
273 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
274 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
275 | |
276 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
277 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
278 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
279 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
280 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
281 | |
282 | =cut |
283 | */ |
284 | |
79072805 |
285 | GV * |
864dbfa3 |
286 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
287 | { |
97aff369 |
288 | dVAR; |
79072805 |
289 | AV* av; |
463ee0b2 |
290 | GV* topgv; |
79072805 |
291 | GV* gv; |
463ee0b2 |
292 | GV** gvp; |
748a9306 |
293 | CV* cv; |
bfcb3514 |
294 | const char *hvname; |
a0d0e21e |
295 | |
af09ea45 |
296 | /* UNIVERSAL methods should be callable without a stash */ |
297 | if (!stash) { |
298 | level = -1; /* probably appropriate */ |
89529cee |
299 | if(!(stash = gv_stashpvs("UNIVERSAL", FALSE))) |
af09ea45 |
300 | return 0; |
301 | } |
302 | |
bfcb3514 |
303 | hvname = HvNAME_get(stash); |
304 | if (!hvname) |
e27ad1f2 |
305 | Perl_croak(aTHX_ |
306 | "Can't use anonymous symbol table for method lookup"); |
307 | |
44a8e56a |
308 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
309 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
bfcb3514 |
310 | name, hvname); |
463ee0b2 |
311 | |
bfcb3514 |
312 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a |
313 | |
314 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
315 | if (!gvp) |
a0714e2c |
316 | topgv = NULL; |
44a8e56a |
317 | else { |
318 | topgv = *gvp; |
319 | if (SvTYPE(topgv) != SVt_PVGV) |
320 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
321 | if ((cv = GvCV(topgv))) { |
44a8e56a |
322 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
323 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
324 | return topgv; |
44a8e56a |
325 | /* Stale cached entry: junk it */ |
326 | SvREFCNT_dec(cv); |
601f1833 |
327 | GvCV(topgv) = cv = NULL; |
44a8e56a |
328 | GvCVGEN(topgv) = 0; |
748a9306 |
329 | } |
3280af22 |
330 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
331 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
332 | } |
79072805 |
333 | |
017a3ce5 |
334 | gvp = (GV**)hv_fetchs(stash, "ISA", FALSE); |
7d49f689 |
335 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : NULL; |
9607fc9c |
336 | |
fb73857a |
337 | /* create and re-create @.*::SUPER::ISA on demand */ |
338 | if (!av || !SvMAGIC(av)) { |
7423f6db |
339 | STRLEN packlen = HvNAMELEN_get(stash); |
9607fc9c |
340 | |
bfcb3514 |
341 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { |
9607fc9c |
342 | HV* basestash; |
343 | |
344 | packlen -= 7; |
bfcb3514 |
345 | basestash = gv_stashpvn(hvname, packlen, TRUE); |
017a3ce5 |
346 | gvp = (GV**)hv_fetchs(basestash, "ISA", FALSE); |
3280af22 |
347 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
017a3ce5 |
348 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); |
9607fc9c |
349 | if (!gvp || !(gv = *gvp)) |
bfcb3514 |
350 | Perl_croak(aTHX_ "Cannot create %s::ISA", hvname); |
9607fc9c |
351 | if (SvTYPE(gv) != SVt_PVGV) |
352 | gv_init(gv, stash, "ISA", 3, TRUE); |
353 | SvREFCNT_dec(GvAV(gv)); |
354 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
355 | } |
356 | } |
357 | } |
358 | |
359 | if (av) { |
79072805 |
360 | SV** svp = AvARRAY(av); |
93965878 |
361 | /* NOTE: No support for tied ISA */ |
362 | I32 items = AvFILLp(av) + 1; |
79072805 |
363 | while (items--) { |
823a54a3 |
364 | SV* const sv = *svp++; |
365 | HV* const basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
366 | if (!basestash) { |
599cee73 |
367 | if (ckWARN(WARN_MISC)) |
35c1215d |
368 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA", |
bfcb3514 |
369 | sv, hvname); |
79072805 |
370 | continue; |
371 | } |
44a8e56a |
372 | gv = gv_fetchmeth(basestash, name, len, |
373 | (level >= 0) ? level + 1 : level - 1); |
374 | if (gv) |
375 | goto gotcha; |
79072805 |
376 | } |
377 | } |
a0d0e21e |
378 | |
9607fc9c |
379 | /* if at top level, try UNIVERSAL */ |
380 | |
44a8e56a |
381 | if (level == 0 || level == -1) { |
89529cee |
382 | HV* const lastchance = gv_stashpvs("UNIVERSAL", FALSE); |
9607fc9c |
383 | |
823a54a3 |
384 | if (lastchance) { |
155aba94 |
385 | if ((gv = gv_fetchmeth(lastchance, name, len, |
386 | (level >= 0) ? level + 1 : level - 1))) |
387 | { |
44a8e56a |
388 | gotcha: |
dc848c6f |
389 | /* |
390 | * Cache method in topgv if: |
391 | * 1. topgv has no synonyms (else inheritance crosses wires) |
392 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
393 | */ |
394 | if (topgv && |
395 | GvREFCNT(topgv) == 1 && |
396 | (cv = GvCV(gv)) && |
397 | (CvROOT(cv) || CvXSUB(cv))) |
398 | { |
155aba94 |
399 | if ((cv = GvCV(topgv))) |
44a8e56a |
400 | SvREFCNT_dec(cv); |
401 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
402 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
403 | } |
a0d0e21e |
404 | return gv; |
405 | } |
005a453c |
406 | else if (topgv && GvREFCNT(topgv) == 1) { |
407 | /* cache the fact that the method is not defined */ |
3280af22 |
408 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
409 | } |
a0d0e21e |
410 | } |
411 | } |
412 | |
79072805 |
413 | return 0; |
414 | } |
415 | |
954c1994 |
416 | /* |
611c1e95 |
417 | =for apidoc gv_fetchmeth_autoload |
418 | |
419 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. |
420 | Returns a glob for the subroutine. |
421 | |
422 | For an autoloaded subroutine without a GV, will create a GV even |
423 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() |
424 | of the result may be zero. |
425 | |
426 | =cut |
427 | */ |
428 | |
429 | GV * |
430 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
431 | { |
432 | GV *gv = gv_fetchmeth(stash, name, len, level); |
433 | |
434 | if (!gv) { |
611c1e95 |
435 | CV *cv; |
436 | GV **gvp; |
437 | |
438 | if (!stash) |
6136c704 |
439 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
5c7983e5 |
440 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
6136c704 |
441 | return NULL; |
5c7983e5 |
442 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 |
443 | return NULL; |
611c1e95 |
444 | cv = GvCV(gv); |
445 | if (!(CvROOT(cv) || CvXSUB(cv))) |
6136c704 |
446 | return NULL; |
611c1e95 |
447 | /* Have an autoload */ |
448 | if (level < 0) /* Cannot do without a stub */ |
449 | gv_fetchmeth(stash, name, len, 0); |
450 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
451 | if (!gvp) |
6136c704 |
452 | return NULL; |
611c1e95 |
453 | return *gvp; |
454 | } |
455 | return gv; |
456 | } |
457 | |
458 | /* |
954c1994 |
459 | =for apidoc gv_fetchmethod_autoload |
460 | |
461 | Returns the glob which contains the subroutine to call to invoke the method |
462 | on the C<stash>. In fact in the presence of autoloading this may be the |
463 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
464 | already setup. |
954c1994 |
465 | |
466 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
467 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
468 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
469 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
470 | with a non-zero C<autoload> parameter. |
954c1994 |
471 | |
472 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
473 | that if you want to keep the returned glob for a long time, you need to |
474 | check for it being "AUTOLOAD", since at the later time the call may load a |
475 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
476 | created via a side effect to do this. |
954c1994 |
477 | |
478 | These functions have the same side-effects and as C<gv_fetchmeth> with |
479 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
480 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
481 | C<call_sv> apply equally to these functions. |
954c1994 |
482 | |
483 | =cut |
484 | */ |
485 | |
dc848c6f |
486 | GV * |
864dbfa3 |
487 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
488 | { |
97aff369 |
489 | dVAR; |
08105a92 |
490 | register const char *nend; |
c445ea15 |
491 | const char *nsplit = NULL; |
a0d0e21e |
492 | GV* gv; |
0dae17bd |
493 | HV* ostash = stash; |
494 | |
495 | if (stash && SvTYPE(stash) < SVt_PVHV) |
5c284bb0 |
496 | stash = NULL; |
b267980d |
497 | |
463ee0b2 |
498 | for (nend = name; *nend; nend++) { |
9607fc9c |
499 | if (*nend == '\'') |
a0d0e21e |
500 | nsplit = nend; |
9607fc9c |
501 | else if (*nend == ':' && *(nend + 1) == ':') |
502 | nsplit = ++nend; |
a0d0e21e |
503 | } |
504 | if (nsplit) { |
9d4ba2ae |
505 | const char * const origname = name; |
a0d0e21e |
506 | name = nsplit + 1; |
a0d0e21e |
507 | if (*nsplit == ':') |
508 | --nsplit; |
9607fc9c |
509 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
510 | /* ->SUPER::method should really be looked up in original stash */ |
cea2e8a9 |
511 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
512 | CopSTASHPV(PL_curcop))); |
af09ea45 |
513 | /* __PACKAGE__::SUPER stash should be autovivified */ |
b15aece3 |
514 | stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
515 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 |
516 | origname, HvNAME_get(stash), name) ); |
4633a7c4 |
517 | } |
e189a56d |
518 | else { |
af09ea45 |
519 | /* don't autovifify if ->NoSuchStash::method */ |
520 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); |
e189a56d |
521 | |
522 | /* however, explicit calls to Pkg::SUPER::method may |
523 | happen, and may require autovivification to work */ |
524 | if (!stash && (nsplit - origname) >= 7 && |
525 | strnEQ(nsplit - 7, "::SUPER", 7) && |
526 | gv_stashpvn(origname, nsplit - origname - 7, FALSE)) |
527 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
528 | } |
0dae17bd |
529 | ostash = stash; |
4633a7c4 |
530 | } |
531 | |
9607fc9c |
532 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
533 | if (!gv) { |
2f6e0fe7 |
534 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
535 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
536 | else if (autoload) |
0dae17bd |
537 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 |
538 | } |
dc848c6f |
539 | else if (autoload) { |
9d4ba2ae |
540 | CV* const cv = GvCV(gv); |
09280a33 |
541 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
542 | GV* stubgv; |
543 | GV* autogv; |
544 | |
545 | if (CvANON(cv)) |
546 | stubgv = gv; |
547 | else { |
548 | stubgv = CvGV(cv); |
549 | if (GvCV(stubgv) != cv) /* orphaned import */ |
550 | stubgv = gv; |
551 | } |
552 | autogv = gv_autoload4(GvSTASH(stubgv), |
553 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
554 | if (autogv) |
555 | gv = autogv; |
556 | } |
557 | } |
44a8e56a |
558 | |
559 | return gv; |
560 | } |
561 | |
562 | GV* |
864dbfa3 |
563 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
564 | { |
27da23d5 |
565 | dVAR; |
44a8e56a |
566 | GV* gv; |
567 | CV* cv; |
568 | HV* varstash; |
569 | GV* vargv; |
570 | SV* varsv; |
e1ec3a88 |
571 | const char *packname = ""; |
7423f6db |
572 | STRLEN packname_len; |
44a8e56a |
573 | |
5c7983e5 |
574 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
a0714e2c |
575 | return NULL; |
0dae17bd |
576 | if (stash) { |
577 | if (SvTYPE(stash) < SVt_PVHV) { |
e62f0680 |
578 | packname = SvPV_const((SV*)stash, packname_len); |
5c284bb0 |
579 | stash = NULL; |
0dae17bd |
580 | } |
581 | else { |
bfcb3514 |
582 | packname = HvNAME_get(stash); |
7423f6db |
583 | packname_len = HvNAMELEN_get(stash); |
0dae17bd |
584 | } |
585 | } |
5c7983e5 |
586 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c |
587 | return NULL; |
dc848c6f |
588 | cv = GvCV(gv); |
589 | |
adb5a9ae |
590 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c |
591 | return NULL; |
ed850460 |
592 | |
dc848c6f |
593 | /* |
594 | * Inheriting AUTOLOAD for non-methods works ... for now. |
595 | */ |
041457d9 |
596 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
597 | && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) |
598 | ) |
12bcd1a6 |
599 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f |
600 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd |
601 | packname, (int)len, name); |
44a8e56a |
602 | |
aed2304a |
603 | if (CvISXSUB(cv)) { |
adb5a9ae |
604 | /* rather than lookup/init $AUTOLOAD here |
605 | * only to have the XSUB do another lookup for $AUTOLOAD |
606 | * and split that value on the last '::', |
607 | * pass along the same data via some unused fields in the CV |
608 | */ |
609 | CvSTASH(cv) = stash; |
f880fe2f |
610 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 |
611 | SvCUR_set(cv, len); |
adb5a9ae |
612 | return gv; |
613 | } |
adb5a9ae |
614 | |
44a8e56a |
615 | /* |
616 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
617 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
618 | * use that, but for lack of anything better we will use the sub's |
619 | * original package to look up $AUTOLOAD. |
620 | */ |
621 | varstash = GvSTASH(CvGV(cv)); |
5c7983e5 |
622 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b |
623 | ENTER; |
624 | |
c69033f2 |
625 | if (!isGV(vargv)) { |
5c7983e5 |
626 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 |
627 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 |
628 | GvSV(vargv) = newSV(0); |
c69033f2 |
629 | #endif |
630 | } |
3d35f11b |
631 | LEAVE; |
e203899d |
632 | varsv = GvSVn(vargv); |
7423f6db |
633 | sv_setpvn(varsv, packname, packname_len); |
396482e1 |
634 | sv_catpvs(varsv, "::"); |
44a8e56a |
635 | sv_catpvn(varsv, name, len); |
636 | SvTAINTED_off(varsv); |
a0d0e21e |
637 | return gv; |
638 | } |
639 | |
d2c93421 |
640 | /* The "gv" parameter should be the glob known to Perl code as *! |
641 | * The scalar must already have been magicalized. |
642 | */ |
643 | STATIC void |
644 | S_require_errno(pTHX_ GV *gv) |
645 | { |
27da23d5 |
646 | dVAR; |
89529cee |
647 | HV* stash = gv_stashpvs("Errno", FALSE); |
d2c93421 |
648 | |
a0288114 |
649 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
d2c93421 |
650 | dSP; |
651 | PUTBACK; |
652 | ENTER; |
653 | save_scalar(gv); /* keep the value of $! */ |
84f1fa11 |
654 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
a0714e2c |
655 | newSVpvs("Errno"), NULL); |
d2c93421 |
656 | LEAVE; |
657 | SPAGAIN; |
89529cee |
658 | stash = gv_stashpvs("Errno", FALSE); |
d2c93421 |
659 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
660 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
661 | } |
662 | } |
663 | |
954c1994 |
664 | /* |
665 | =for apidoc gv_stashpv |
666 | |
386d01d6 |
667 | Returns a pointer to the stash for a specified package. C<name> should |
bc96cb06 |
668 | be a valid UTF-8 string and must be null-terminated. If C<create> is set |
669 | then the package will be created if it does not already exist. If C<create> |
670 | is not set and the package does not exist then NULL is returned. |
954c1994 |
671 | |
672 | =cut |
673 | */ |
674 | |
a0d0e21e |
675 | HV* |
864dbfa3 |
676 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
677 | { |
dc437b57 |
678 | return gv_stashpvn(name, strlen(name), create); |
679 | } |
680 | |
bc96cb06 |
681 | /* |
682 | =for apidoc gv_stashpvn |
683 | |
684 | Returns a pointer to the stash for a specified package. C<name> should |
685 | be a valid UTF-8 string. The C<namelen> parameter indicates the length of |
686 | the C<name>, in bytes. If C<create> is set then the package will be |
687 | created if it does not already exist. If C<create> is not set and the |
688 | package does not exist then NULL is returned. |
689 | |
690 | =cut |
691 | */ |
692 | |
dc437b57 |
693 | HV* |
864dbfa3 |
694 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
695 | { |
0cea0058 |
696 | char smallbuf[128]; |
46fc3d4c |
697 | char *tmpbuf; |
a0d0e21e |
698 | HV *stash; |
699 | GV *tmpgv; |
dc437b57 |
700 | |
46fc3d4c |
701 | if (namelen + 3 < sizeof smallbuf) |
702 | tmpbuf = smallbuf; |
703 | else |
a02a5408 |
704 | Newx(tmpbuf, namelen + 3, char); |
dc437b57 |
705 | Copy(name,tmpbuf,namelen,char); |
706 | tmpbuf[namelen++] = ':'; |
707 | tmpbuf[namelen++] = ':'; |
708 | tmpbuf[namelen] = '\0'; |
9fb9dfd8 |
709 | tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, create, SVt_PVHV); |
46fc3d4c |
710 | if (tmpbuf != smallbuf) |
711 | Safefree(tmpbuf); |
a0d0e21e |
712 | if (!tmpgv) |
713 | return 0; |
714 | if (!GvHV(tmpgv)) |
715 | GvHV(tmpgv) = newHV(); |
716 | stash = GvHV(tmpgv); |
bfcb3514 |
717 | if (!HvNAME_get(stash)) |
51a37f80 |
718 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e |
719 | return stash; |
463ee0b2 |
720 | } |
721 | |
954c1994 |
722 | /* |
723 | =for apidoc gv_stashsv |
724 | |
386d01d6 |
725 | Returns a pointer to the stash for a specified package, which must be a |
726 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
727 | |
728 | =cut |
729 | */ |
730 | |
a0d0e21e |
731 | HV* |
864dbfa3 |
732 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
733 | { |
dc437b57 |
734 | STRLEN len; |
9d4ba2ae |
735 | const char * const ptr = SvPV_const(sv,len); |
dc437b57 |
736 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
737 | } |
738 | |
739 | |
463ee0b2 |
740 | GV * |
7a5fd60d |
741 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { |
b7787f18 |
742 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d |
743 | } |
744 | |
745 | GV * |
746 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) { |
747 | STRLEN len; |
9d4ba2ae |
748 | const char * const nambeg = SvPV_const(name, len); |
7a5fd60d |
749 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
750 | } |
751 | |
752 | GV * |
753 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, |
754 | I32 sv_type) |
79072805 |
755 | { |
97aff369 |
756 | dVAR; |
08105a92 |
757 | register const char *name = nambeg; |
c445ea15 |
758 | register GV *gv = NULL; |
79072805 |
759 | GV**gvp; |
79072805 |
760 | I32 len; |
b3d904f3 |
761 | register const char *name_cursor; |
c445ea15 |
762 | HV *stash = NULL; |
add2581e |
763 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a |
764 | const I32 no_expand = flags & GV_NOEXPAND; |
fafc274c |
765 | const I32 add = |
766 | flags & ~SVf_UTF8 & ~GV_NOADD_NOINIT & ~GV_NOEXPAND & ~GV_NOTQUAL; |
b3d904f3 |
767 | const char *const name_end = nambeg + full_len; |
768 | const char *const name_em1 = name_end - 1; |
79072805 |
769 | |
fafc274c |
770 | if (flags & GV_NOTQUAL) { |
771 | /* Caller promised that there is no stash, so we can skip the check. */ |
772 | len = full_len; |
773 | goto no_stash; |
774 | } |
775 | |
b208e10c |
776 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
777 | /* accidental stringify on a GV? */ |
c07a80fd |
778 | name++; |
b208e10c |
779 | } |
c07a80fd |
780 | |
b3d904f3 |
781 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
782 | if ((*name_cursor == ':' && name_cursor < name_em1 |
783 | && name_cursor[1] == ':') |
784 | || (*name_cursor == '\'' && name_cursor[1])) |
463ee0b2 |
785 | { |
463ee0b2 |
786 | if (!stash) |
3280af22 |
787 | stash = PL_defstash; |
dc437b57 |
788 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
789 | return NULL; |
463ee0b2 |
790 | |
b3d904f3 |
791 | len = name_cursor - name; |
85e6fe83 |
792 | if (len > 0) { |
0cea0058 |
793 | char smallbuf[128]; |
62b57502 |
794 | char *tmpbuf; |
62b57502 |
795 | |
25c09a70 |
796 | if (len + 3 < sizeof (smallbuf)) |
3c78fafa |
797 | tmpbuf = smallbuf; |
62b57502 |
798 | else |
a02a5408 |
799 | Newx(tmpbuf, len+3, char); |
a0d0e21e |
800 | Copy(name, tmpbuf, len, char); |
801 | tmpbuf[len++] = ':'; |
802 | tmpbuf[len++] = ':'; |
803 | tmpbuf[len] = '\0'; |
463ee0b2 |
804 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
a0714e2c |
805 | gv = gvp ? *gvp : NULL; |
3280af22 |
806 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
807 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
808 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
809 | else |
810 | GvMULTI_on(gv); |
811 | } |
3c78fafa |
812 | if (tmpbuf != smallbuf) |
62b57502 |
813 | Safefree(tmpbuf); |
3280af22 |
814 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0714e2c |
815 | return NULL; |
85e6fe83 |
816 | |
463ee0b2 |
817 | if (!(stash = GvHV(gv))) |
818 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
819 | |
bfcb3514 |
820 | if (!HvNAME_get(stash)) |
b3d904f3 |
821 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); |
463ee0b2 |
822 | } |
823 | |
b3d904f3 |
824 | if (*name_cursor == ':') |
825 | name_cursor++; |
826 | name_cursor++; |
827 | name = name_cursor; |
ad6bfa9d |
828 | if (name == name_end) |
017a3ce5 |
829 | return gv ? gv : (GV*)*hv_fetchs(PL_defstash, "main::", TRUE); |
79072805 |
830 | } |
79072805 |
831 | } |
b3d904f3 |
832 | len = name_cursor - name; |
463ee0b2 |
833 | |
834 | /* No stash in name, so see how we can default */ |
835 | |
836 | if (!stash) { |
fafc274c |
837 | no_stash: |
8ccce9ae |
838 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c |
839 | bool global = FALSE; |
840 | |
8ccce9ae |
841 | switch (len) { |
842 | case 1: |
18ea00d7 |
843 | if (*name == '_') |
9d116dd7 |
844 | global = TRUE; |
18ea00d7 |
845 | break; |
8ccce9ae |
846 | case 3: |
847 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') |
848 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') |
849 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) |
9d116dd7 |
850 | global = TRUE; |
18ea00d7 |
851 | break; |
8ccce9ae |
852 | case 4: |
853 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
854 | && name[3] == 'V') |
9d116dd7 |
855 | global = TRUE; |
18ea00d7 |
856 | break; |
8ccce9ae |
857 | case 5: |
858 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' |
859 | && name[3] == 'I' && name[4] == 'N') |
463ee0b2 |
860 | global = TRUE; |
18ea00d7 |
861 | break; |
8ccce9ae |
862 | case 6: |
863 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') |
864 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') |
865 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) |
866 | global = TRUE; |
867 | break; |
868 | case 7: |
869 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' |
870 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' |
871 | && name[6] == 'T') |
18ea00d7 |
872 | global = TRUE; |
873 | break; |
463ee0b2 |
874 | } |
9607fc9c |
875 | |
463ee0b2 |
876 | if (global) |
3280af22 |
877 | stash = PL_defstash; |
923e4eb5 |
878 | else if (IN_PERL_COMPILETIME) { |
3280af22 |
879 | stash = PL_curstash; |
880 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
881 | sv_type != SVt_PVCV && |
882 | sv_type != SVt_PVGV && |
4633a7c4 |
883 | sv_type != SVt_PVFM && |
c07a80fd |
884 | sv_type != SVt_PVIO && |
70ec6265 |
885 | !(len == 1 && sv_type == SVt_PV && |
886 | (*name == 'a' || *name == 'b')) ) |
748a9306 |
887 | { |
4633a7c4 |
888 | gvp = (GV**)hv_fetch(stash,name,len,0); |
889 | if (!gvp || |
3280af22 |
890 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
891 | SvTYPE(*gvp) != SVt_PVGV) |
892 | { |
4633a7c4 |
893 | stash = 0; |
a5f75d66 |
894 | } |
155aba94 |
895 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
896 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
897 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
898 | { |
cea2e8a9 |
899 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
900 | sv_type == SVt_PVAV ? '@' : |
901 | sv_type == SVt_PVHV ? '%' : '$', |
902 | name); |
8ebc5c01 |
903 | if (GvCVu(*gvp)) |
cc507455 |
904 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
905 | stash = 0; |
4633a7c4 |
906 | } |
a0d0e21e |
907 | } |
85e6fe83 |
908 | } |
463ee0b2 |
909 | else |
1d7c1841 |
910 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
911 | } |
912 | else |
3280af22 |
913 | stash = PL_defstash; |
463ee0b2 |
914 | } |
915 | |
916 | /* By this point we should have a stash and a name */ |
917 | |
a0d0e21e |
918 | if (!stash) { |
5a844595 |
919 | if (add) { |
9d4ba2ae |
920 | SV * const err = Perl_mess(aTHX_ |
5a844595 |
921 | "Global symbol \"%s%s\" requires explicit package name", |
922 | (sv_type == SVt_PV ? "$" |
923 | : sv_type == SVt_PVAV ? "@" |
924 | : sv_type == SVt_PVHV ? "%" |
608b3986 |
925 | : ""), name); |
926 | if (USE_UTF8_IN_NAMES) |
927 | SvUTF8_on(err); |
928 | qerror(err); |
9fb9dfd8 |
929 | stash = GvHV(gv_fetchpvn_flags("<none>::", 8, GV_ADDMULTI, SVt_PVHV)); |
a0d0e21e |
930 | } |
d7aacf4e |
931 | else |
a0714e2c |
932 | return NULL; |
a0d0e21e |
933 | } |
934 | |
935 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c |
936 | return NULL; |
a0d0e21e |
937 | |
79072805 |
938 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
939 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
a0714e2c |
940 | return NULL; |
79072805 |
941 | gv = *gvp; |
942 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
943 | if (add) { |
a5f75d66 |
944 | GvMULTI_on(gv); |
a0d0e21e |
945 | gv_init_sv(gv, sv_type); |
d2c93421 |
946 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
947 | require_errno(gv); |
a0d0e21e |
948 | } |
79072805 |
949 | return gv; |
add2581e |
950 | } else if (no_init) { |
55d729e4 |
951 | return gv; |
e26df76a |
952 | } else if (no_expand && SvROK(gv)) { |
953 | return gv; |
79072805 |
954 | } |
93a17b20 |
955 | |
956 | /* Adding a new symbol */ |
957 | |
0453d815 |
958 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d |
959 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 |
960 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
961 | gv_init_sv(gv, sv_type); |
93a17b20 |
962 | |
a0288114 |
963 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d |
964 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
965 | GvMULTI_on(gv) ; |
966 | |
93a17b20 |
967 | /* set up magic where warranted */ |
cc4c2da6 |
968 | if (len > 1) { |
9431620d |
969 | #ifndef EBCDIC |
cc4c2da6 |
970 | if (*name > 'V' ) { |
bb263b4e |
971 | /*EMPTY*/; |
cc4c2da6 |
972 | /* Nothing else to do. |
91f565cb |
973 | The compiler will probably turn the switch statement into a |
cc4c2da6 |
974 | branch table. Make sure we avoid even that small overhead for |
975 | the common case of lower case variable names. */ |
9431620d |
976 | } else |
977 | #endif |
978 | { |
b464bac0 |
979 | const char * const name2 = name + 1; |
cc4c2da6 |
980 | switch (*name) { |
981 | case 'A': |
982 | if (strEQ(name2, "RGV")) { |
983 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
984 | } |
985 | break; |
986 | case 'E': |
987 | if (strnEQ(name2, "XPORT", 5)) |
988 | GvMULTI_on(gv); |
989 | break; |
990 | case 'I': |
991 | if (strEQ(name2, "SA")) { |
9d4ba2ae |
992 | AV* const av = GvAVn(gv); |
cc4c2da6 |
993 | GvMULTI_on(gv); |
bd61b366 |
994 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, NULL, 0); |
cc4c2da6 |
995 | /* NOTE: No support for tied ISA */ |
996 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
997 | && AvFILLp(av) == -1) |
998 | { |
e1ec3a88 |
999 | const char *pname; |
cc4c2da6 |
1000 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
1001 | gv_stashpvn(pname, 9, TRUE); |
1002 | av_push(av, newSVpvn(pname = "DB_File",7)); |
1003 | gv_stashpvn(pname, 7, TRUE); |
1004 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
1005 | gv_stashpvn(pname, 9, TRUE); |
1006 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
1007 | gv_stashpvn(pname, 9, TRUE); |
1008 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
1009 | gv_stashpvn(pname, 9, TRUE); |
1010 | } |
1011 | } |
1012 | break; |
1013 | case 'O': |
1014 | if (strEQ(name2, "VERLOAD")) { |
9d4ba2ae |
1015 | HV* const hv = GvHVn(gv); |
cc4c2da6 |
1016 | GvMULTI_on(gv); |
a0714e2c |
1017 | hv_magic(hv, NULL, PERL_MAGIC_overload); |
cc4c2da6 |
1018 | } |
1019 | break; |
1020 | case 'S': |
1021 | if (strEQ(name2, "IG")) { |
1022 | HV *hv; |
1023 | I32 i; |
1024 | if (!PL_psig_ptr) { |
a02a5408 |
1025 | Newxz(PL_psig_ptr, SIG_SIZE, SV*); |
1026 | Newxz(PL_psig_name, SIG_SIZE, SV*); |
1027 | Newxz(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 |
1028 | } |
1029 | GvMULTI_on(gv); |
1030 | hv = GvHVn(gv); |
a0714e2c |
1031 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 |
1032 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 |
1033 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 |
1034 | if (init) |
1035 | sv_setsv(*init, &PL_sv_undef); |
1036 | PL_psig_ptr[i] = 0; |
1037 | PL_psig_name[i] = 0; |
1038 | PL_psig_pend[i] = 0; |
1039 | } |
1040 | } |
1041 | break; |
1042 | case 'V': |
1043 | if (strEQ(name2, "ERSION")) |
1044 | GvMULTI_on(gv); |
1045 | break; |
e5218da5 |
1046 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1047 | if (strEQ(name2, "HILD_ERROR_NATIVE")) |
1048 | goto magicalize; |
1049 | break; |
cc4c2da6 |
1050 | case '\005': /* $^ENCODING */ |
1051 | if (strEQ(name2, "NCODING")) |
1052 | goto magicalize; |
1053 | break; |
1054 | case '\017': /* $^OPEN */ |
1055 | if (strEQ(name2, "PEN")) |
1056 | goto magicalize; |
1057 | break; |
1058 | case '\024': /* ${^TAINT} */ |
1059 | if (strEQ(name2, "AINT")) |
1060 | goto ro_magicalize; |
1061 | break; |
7cebcbc0 |
1062 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 |
1063 | if (strEQ(name2, "NICODE")) |
cc4c2da6 |
1064 | goto ro_magicalize; |
a0288114 |
1065 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 |
1066 | goto ro_magicalize; |
cc4c2da6 |
1067 | break; |
1068 | case '\027': /* $^WARNING_BITS */ |
1069 | if (strEQ(name2, "ARNING_BITS")) |
1070 | goto magicalize; |
1071 | break; |
1072 | case '1': |
1073 | case '2': |
1074 | case '3': |
1075 | case '4': |
1076 | case '5': |
1077 | case '6': |
1078 | case '7': |
1079 | case '8': |
1080 | case '9': |
85e6fe83 |
1081 | { |
cc4c2da6 |
1082 | /* ensures variable is only digits */ |
1083 | /* ${"1foo"} fails this test (and is thus writeable) */ |
1084 | /* added by japhy, but borrowed from is_gv_magical */ |
1085 | const char *end = name + len; |
1086 | while (--end > name) { |
1087 | if (!isDIGIT(*end)) return gv; |
1088 | } |
1089 | goto ro_magicalize; |
1d7c1841 |
1090 | } |
dc437b57 |
1091 | } |
93a17b20 |
1092 | } |
392db708 |
1093 | } else { |
1094 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will |
1095 | be case '\0' in this switch statement (ie a default case) */ |
cc4c2da6 |
1096 | switch (*name) { |
1097 | case '&': |
1098 | case '`': |
1099 | case '\'': |
1100 | if ( |
1101 | sv_type == SVt_PVAV || |
1102 | sv_type == SVt_PVHV || |
1103 | sv_type == SVt_PVCV || |
1104 | sv_type == SVt_PVFM || |
1105 | sv_type == SVt_PVIO |
1106 | ) { break; } |
1107 | PL_sawampersand = TRUE; |
1108 | goto ro_magicalize; |
1109 | |
1110 | case ':': |
c69033f2 |
1111 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 |
1112 | goto magicalize; |
1113 | |
1114 | case '?': |
ff0cee69 |
1115 | #ifdef COMPLEX_STATUS |
c69033f2 |
1116 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 |
1117 | #endif |
cc4c2da6 |
1118 | goto magicalize; |
ff0cee69 |
1119 | |
cc4c2da6 |
1120 | case '!': |
d2c93421 |
1121 | |
cc4c2da6 |
1122 | /* If %! has been used, automatically load Errno.pm. |
1123 | The require will itself set errno, so in order to |
1124 | preserve its value we have to set up the magic |
1125 | now (rather than going to magicalize) |
1126 | */ |
d2c93421 |
1127 | |
c69033f2 |
1128 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
1129 | |
cc4c2da6 |
1130 | if (sv_type == SVt_PVHV) |
1131 | require_errno(gv); |
d2c93421 |
1132 | |
6cef1e77 |
1133 | break; |
cc4c2da6 |
1134 | case '-': |
1135 | { |
9d4ba2ae |
1136 | AV* const av = GvAVn(gv); |
a0714e2c |
1137 | sv_magic((SV*)av, NULL, PERL_MAGIC_regdata, NULL, 0); |
03a27ae7 |
1138 | SvREADONLY_on(av); |
cc4c2da6 |
1139 | goto magicalize; |
1140 | } |
1141 | case '*': |
cc4c2da6 |
1142 | case '#': |
1143 | if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) |
1144 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
8ae1fe26 |
1145 | "$%c is no longer supported", *name); |
1146 | break; |
cc4c2da6 |
1147 | case '|': |
c69033f2 |
1148 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 |
1149 | goto magicalize; |
1150 | |
1151 | case '+': |
1152 | { |
9d4ba2ae |
1153 | AV* const av = GvAVn(gv); |
bd61b366 |
1154 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, NULL, 0); |
03a27ae7 |
1155 | SvREADONLY_on(av); |
cc4c2da6 |
1156 | /* FALL THROUGH */ |
e521374c |
1157 | } |
cc4c2da6 |
1158 | case '\023': /* $^S */ |
1159 | case '1': |
1160 | case '2': |
1161 | case '3': |
1162 | case '4': |
1163 | case '5': |
1164 | case '6': |
1165 | case '7': |
1166 | case '8': |
1167 | case '9': |
1168 | ro_magicalize: |
c69033f2 |
1169 | SvREADONLY_on(GvSVn(gv)); |
cc4c2da6 |
1170 | /* FALL THROUGH */ |
1171 | case '[': |
1172 | case '^': |
1173 | case '~': |
1174 | case '=': |
1175 | case '%': |
1176 | case '.': |
1177 | case '(': |
1178 | case ')': |
1179 | case '<': |
1180 | case '>': |
1181 | case ',': |
1182 | case '\\': |
1183 | case '/': |
1184 | case '\001': /* $^A */ |
1185 | case '\003': /* $^C */ |
1186 | case '\004': /* $^D */ |
1187 | case '\005': /* $^E */ |
1188 | case '\006': /* $^F */ |
1189 | case '\010': /* $^H */ |
1190 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1191 | case '\016': /* $^N */ |
1192 | case '\017': /* $^O */ |
1193 | case '\020': /* $^P */ |
1194 | case '\024': /* $^T */ |
1195 | case '\027': /* $^W */ |
1196 | magicalize: |
c69033f2 |
1197 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
cc4c2da6 |
1198 | break; |
e521374c |
1199 | |
cc4c2da6 |
1200 | case '\014': /* $^L */ |
c69033f2 |
1201 | sv_setpvn(GvSVn(gv),"\f",1); |
1202 | PL_formfeed = GvSVn(gv); |
463ee0b2 |
1203 | break; |
cc4c2da6 |
1204 | case ';': |
c69033f2 |
1205 | sv_setpvn(GvSVn(gv),"\034",1); |
463ee0b2 |
1206 | break; |
cc4c2da6 |
1207 | case ']': |
1208 | { |
c69033f2 |
1209 | SV * const sv = GvSVn(gv); |
d7aa5382 |
1210 | if (!sv_derived_from(PL_patchlevel, "version")) |
7a5b473e |
1211 | upg_version(PL_patchlevel); |
7d54d38e |
1212 | GvSV(gv) = vnumify(PL_patchlevel); |
1213 | SvREADONLY_on(GvSV(gv)); |
1214 | SvREFCNT_dec(sv); |
93a17b20 |
1215 | } |
1216 | break; |
cc4c2da6 |
1217 | case '\026': /* $^V */ |
1218 | { |
c69033f2 |
1219 | SV * const sv = GvSVn(gv); |
f9be5ac8 |
1220 | GvSV(gv) = new_version(PL_patchlevel); |
1221 | SvREADONLY_on(GvSV(gv)); |
1222 | SvREFCNT_dec(sv); |
16070b82 |
1223 | } |
1224 | break; |
cc4c2da6 |
1225 | } |
79072805 |
1226 | } |
93a17b20 |
1227 | return gv; |
79072805 |
1228 | } |
1229 | |
1230 | void |
35a4481c |
1231 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1232 | { |
35a4481c |
1233 | const char *name; |
7423f6db |
1234 | STRLEN namelen; |
35a4481c |
1235 | const HV * const hv = GvSTASH(gv); |
43693395 |
1236 | if (!hv) { |
0c34ef67 |
1237 | SvOK_off(sv); |
43693395 |
1238 | return; |
1239 | } |
1240 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 |
1241 | |
bfcb3514 |
1242 | name = HvNAME_get(hv); |
7423f6db |
1243 | if (name) { |
1244 | namelen = HvNAMELEN_get(hv); |
1245 | } else { |
e27ad1f2 |
1246 | name = "__ANON__"; |
7423f6db |
1247 | namelen = 8; |
1248 | } |
a0288114 |
1249 | |
e27ad1f2 |
1250 | if (keepmain || strNE(name, "main")) { |
7423f6db |
1251 | sv_catpvn(sv,name,namelen); |
396482e1 |
1252 | sv_catpvs(sv,"::"); |
43693395 |
1253 | } |
257984c0 |
1254 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 |
1255 | } |
1256 | |
1257 | void |
35a4481c |
1258 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 |
1259 | { |
46c461b5 |
1260 | const GV * const egv = GvEGV(gv); |
1261 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 |
1262 | } |
1263 | |
79072805 |
1264 | IO * |
864dbfa3 |
1265 | Perl_newIO(pTHX) |
79072805 |
1266 | { |
97aff369 |
1267 | dVAR; |
8990e307 |
1268 | GV *iogv; |
561b68a9 |
1269 | IO * const io = (IO*)newSV(0); |
8990e307 |
1270 | |
a0d0e21e |
1271 | sv_upgrade((SV *)io,SVt_PVIO); |
158623e7 |
1272 | /* This used to read SvREFCNT(io) = 1; |
1273 | It's not clear why the reference count needed an explicit reset. NWC |
1274 | */ |
1275 | assert (SvREFCNT(io) == 1); |
8990e307 |
1276 | SvOBJECT_on(io); |
b464bac0 |
1277 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 |
1278 | hv_clear(PL_stashcache); |
71315bf2 |
1279 | iogv = gv_fetchpvs("FileHandle::", 0, SVt_PVHV); |
5f2d631d |
1280 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1281 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
71315bf2 |
1282 | iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV); |
b162af07 |
1283 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 |
1284 | return io; |
1285 | } |
1286 | |
1287 | void |
864dbfa3 |
1288 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1289 | { |
97aff369 |
1290 | dVAR; |
79072805 |
1291 | register I32 i; |
463ee0b2 |
1292 | |
8990e307 |
1293 | if (!HvARRAY(stash)) |
1294 | return; |
a0d0e21e |
1295 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 |
1296 | const HE *entry; |
dc437b57 |
1297 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 |
1298 | register GV *gv; |
1299 | HV *hv; |
dc437b57 |
1300 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f |
1301 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e |
1302 | { |
19b6c847 |
1303 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1304 | gv_check(hv); /* nested package */ |
1305 | } |
dc437b57 |
1306 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 |
1307 | const char *file; |
dc437b57 |
1308 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1309 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1310 | continue; |
1d7c1841 |
1311 | file = GvFILE(gv); |
1312 | /* performance hack: if filename is absolute and it's a standard |
1313 | * module, don't bother warning */ |
6eb630b7 |
1314 | #ifdef MACOS_TRADITIONAL |
551405c4 |
1315 | # define LIB_COMPONENT ":lib:" |
6eb630b7 |
1316 | #else |
551405c4 |
1317 | # define LIB_COMPONENT "/lib/" |
6eb630b7 |
1318 | #endif |
551405c4 |
1319 | if (file |
1320 | && PERL_FILE_IS_ABSOLUTE(file) |
1321 | && (instr(file, LIB_COMPONENT) || instr(file, ".pm"))) |
1d7c1841 |
1322 | { |
8990e307 |
1323 | continue; |
1d7c1841 |
1324 | } |
1325 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1326 | #ifdef USE_ITHREADS |
dd374669 |
1327 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 |
1328 | #else |
1329 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1330 | #endif |
9014280d |
1331 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 |
1332 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 |
1333 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 |
1334 | } |
79072805 |
1335 | } |
1336 | } |
1337 | } |
1338 | |
1339 | GV * |
e1ec3a88 |
1340 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 |
1341 | { |
97aff369 |
1342 | dVAR; |
cea2e8a9 |
1343 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1344 | TRUE, SVt_PVGV); |
79072805 |
1345 | } |
1346 | |
1347 | /* hopefully this is only called on local symbol table entries */ |
1348 | |
1349 | GP* |
864dbfa3 |
1350 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1351 | { |
97aff369 |
1352 | dVAR; |
1d7c1841 |
1353 | if (!gp) |
1354 | return (GP*)NULL; |
79072805 |
1355 | gp->gp_refcnt++; |
44a8e56a |
1356 | if (gp->gp_cv) { |
1357 | if (gp->gp_cvgen) { |
1358 | /* multi-named GPs cannot be used for method cache */ |
1359 | SvREFCNT_dec(gp->gp_cv); |
601f1833 |
1360 | gp->gp_cv = NULL; |
44a8e56a |
1361 | gp->gp_cvgen = 0; |
1362 | } |
1363 | else { |
1364 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1365 | PL_sub_generation++; |
44a8e56a |
1366 | } |
1367 | } |
79072805 |
1368 | return gp; |
79072805 |
1369 | } |
1370 | |
1371 | void |
864dbfa3 |
1372 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1373 | { |
97aff369 |
1374 | dVAR; |
79072805 |
1375 | GP* gp; |
1376 | |
1377 | if (!gv || !(gp = GvGP(gv))) |
1378 | return; |
f248d071 |
1379 | if (gp->gp_refcnt == 0) { |
1380 | if (ckWARN_d(WARN_INTERNAL)) |
9014280d |
1381 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc |
1382 | "Attempt to free unreferenced glob pointers" |
1383 | pTHX__FORMAT pTHX__VALUE); |
79072805 |
1384 | return; |
1385 | } |
44a8e56a |
1386 | if (gp->gp_cv) { |
1387 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1388 | PL_sub_generation++; |
44a8e56a |
1389 | } |
748a9306 |
1390 | if (--gp->gp_refcnt > 0) { |
1391 | if (gp->gp_egv == gv) |
1392 | gp->gp_egv = 0; |
79072805 |
1393 | return; |
748a9306 |
1394 | } |
79072805 |
1395 | |
13207a71 |
1396 | if (gp->gp_sv) SvREFCNT_dec(gp->gp_sv); |
8926f269 |
1397 | if (gp->gp_av) SvREFCNT_dec(gp->gp_av); |
bfcb3514 |
1398 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1399 | Somehow gp->gp_hv can end up pointing at freed garbage. */ |
1400 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { |
bfcb3514 |
1401 | const char *hvname = HvNAME_get(gp->gp_hv); |
1402 | if (PL_stashcache && hvname) |
7423f6db |
1403 | hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
1404 | G_DISCARD); |
bfcb3514 |
1405 | SvREFCNT_dec(gp->gp_hv); |
13207a71 |
1406 | } |
1407 | if (gp->gp_io) SvREFCNT_dec(gp->gp_io); |
1408 | if (gp->gp_cv) SvREFCNT_dec(gp->gp_cv); |
1409 | if (gp->gp_form) SvREFCNT_dec(gp->gp_form); |
748a9306 |
1410 | |
79072805 |
1411 | Safefree(gp); |
1412 | GvGP(gv) = 0; |
1413 | } |
1414 | |
d460ef45 |
1415 | int |
1416 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1417 | { |
53c1dcc0 |
1418 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1419 | PERL_UNUSED_ARG(sv); |
dd374669 |
1420 | |
d460ef45 |
1421 | if (amtp && AMT_AMAGIC(amtp)) { |
1422 | int i; |
1423 | for (i = 1; i < NofAMmeth; i++) { |
53c1dcc0 |
1424 | CV * const cv = amtp->table[i]; |
601f1833 |
1425 | if (cv != NULL) { |
d460ef45 |
1426 | SvREFCNT_dec((SV *) cv); |
601f1833 |
1427 | amtp->table[i] = NULL; |
d460ef45 |
1428 | } |
1429 | } |
1430 | } |
1431 | return 0; |
1432 | } |
1433 | |
a0d0e21e |
1434 | /* Updates and caches the CV's */ |
1435 | |
1436 | bool |
864dbfa3 |
1437 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1438 | { |
97aff369 |
1439 | dVAR; |
53c1dcc0 |
1440 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
1441 | AMT * const amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1442 | AMT amt; |
a0d0e21e |
1443 | |
3280af22 |
1444 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1445 | && amtp->was_ok_sub == PL_sub_generation) |
eb160463 |
1446 | return (bool)AMT_OVERLOADED(amtp); |
14befaf4 |
1447 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e |
1448 | |
bfcb3514 |
1449 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e |
1450 | |
d460ef45 |
1451 | Zero(&amt,1,AMT); |
3280af22 |
1452 | amt.was_ok_am = PL_amagic_generation; |
1453 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1454 | amt.fallback = AMGfallNO; |
1455 | amt.flags = 0; |
1456 | |
a6006777 |
1457 | { |
32251b26 |
1458 | int filled = 0, have_ovl = 0; |
1459 | int i, lim = 1; |
a6006777 |
1460 | |
22c35a8c |
1461 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1462 | |
89ffc314 |
1463 | /* Try to find via inheritance. */ |
53c1dcc0 |
1464 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1465 | SV * const sv = gv ? GvSV(gv) : NULL; |
1466 | CV* cv; |
89ffc314 |
1467 | |
1468 | if (!gv) |
32251b26 |
1469 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 |
1470 | #ifdef PERL_DONT_CREATE_GVSV |
1471 | else if (!sv) { |
bb263b4e |
1472 | /*EMPTY*/; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 |
1473 | } |
1474 | #endif |
89ffc314 |
1475 | else if (SvTRUE(sv)) |
1476 | amt.fallback=AMGfallYES; |
1477 | else if (SvOK(sv)) |
1478 | amt.fallback=AMGfallNEVER; |
a6006777 |
1479 | |
32251b26 |
1480 | for (i = 1; i < lim; i++) |
601f1833 |
1481 | amt.table[i] = NULL; |
32251b26 |
1482 | for (; i < NofAMmeth; i++) { |
6136c704 |
1483 | const char * const cooky = PL_AMG_names[i]; |
32251b26 |
1484 | /* Human-readable form, for debugging: */ |
6136c704 |
1485 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
e1ec3a88 |
1486 | const STRLEN l = strlen(cooky); |
89ffc314 |
1487 | |
a0288114 |
1488 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1489 | cp, HvNAME_get(stash)) ); |
611c1e95 |
1490 | /* don't fill the cache while looking up! |
1491 | Creation of inheritance stubs in intermediate packages may |
1492 | conflict with the logic of runtime method substitution. |
1493 | Indeed, for inheritance A -> B -> C, if C overloads "+0", |
1494 | then we could have created stubs for "(+0" in A and C too. |
1495 | But if B overloads "bool", we may want to use it for |
1496 | numifying instead of C's "+0". */ |
1497 | if (i >= DESTROY_amg) |
1498 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); |
1499 | else /* Autoload taken care of below */ |
1500 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); |
46fc3d4c |
1501 | cv = 0; |
89ffc314 |
1502 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 |
1503 | const char *hvname; |
44a8e56a |
1504 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 |
1505 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 |
1506 | /* This is a hack to support autoloading..., while |
1507 | knowing *which* methods were declared as overloaded. */ |
44a8e56a |
1508 | /* GvSV contains the name of the method. */ |
6136c704 |
1509 | GV *ngv = NULL; |
c69033f2 |
1510 | SV *gvsv = GvSV(gv); |
a0288114 |
1511 | |
1512 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ |
1513 | "\" for overloaded \"%s\" in package \"%.256s\"\n", |
bfcb3514 |
1514 | GvSV(gv), cp, hvname) ); |
c69033f2 |
1515 | if (!gvsv || !SvPOK(gvsv) |
1516 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), |
dc848c6f |
1517 | FALSE))) |
1518 | { |
a0288114 |
1519 | /* Can be an import stub (created by "can"). */ |
c69033f2 |
1520 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
a0288114 |
1521 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1522 | "in package \"%.256s\"", |
35c1215d |
1523 | (GvCVGEN(gv) ? "Stub found while resolving" |
1524 | : "Can't resolve"), |
bfcb3514 |
1525 | name, cp, hvname); |
44a8e56a |
1526 | } |
dc848c6f |
1527 | cv = GvCV(gv = ngv); |
44a8e56a |
1528 | } |
b464bac0 |
1529 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 |
1530 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a |
1531 | GvNAME(CvGV(cv))) ); |
1532 | filled = 1; |
32251b26 |
1533 | if (i < DESTROY_amg) |
1534 | have_ovl = 1; |
611c1e95 |
1535 | } else if (gv) { /* Autoloaded... */ |
1536 | cv = (CV*)gv; |
1537 | filled = 1; |
44a8e56a |
1538 | } |
a6006777 |
1539 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1540 | } |
a0d0e21e |
1541 | if (filled) { |
a6006777 |
1542 | AMT_AMAGIC_on(&amt); |
32251b26 |
1543 | if (have_ovl) |
1544 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1545 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1546 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1547 | return have_ovl; |
a0d0e21e |
1548 | } |
1549 | } |
a6006777 |
1550 | /* Here we have no table: */ |
9cbac4c7 |
1551 | /* no_table: */ |
a6006777 |
1552 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1553 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1554 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1555 | return FALSE; |
1556 | } |
1557 | |
32251b26 |
1558 | |
1559 | CV* |
1560 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1561 | { |
97aff369 |
1562 | dVAR; |
3f8f4626 |
1563 | MAGIC *mg; |
32251b26 |
1564 | AMT *amtp; |
1565 | |
bfcb3514 |
1566 | if (!stash || !HvNAME_get(stash)) |
601f1833 |
1567 | return NULL; |
14befaf4 |
1568 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1569 | if (!mg) { |
1570 | do_update: |
1571 | Gv_AMupdate(stash); |
14befaf4 |
1572 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1573 | } |
1574 | amtp = (AMT*)mg->mg_ptr; |
1575 | if ( amtp->was_ok_am != PL_amagic_generation |
1576 | || amtp->was_ok_sub != PL_sub_generation ) |
1577 | goto do_update; |
3ad83ce7 |
1578 | if (AMT_AMAGIC(amtp)) { |
b7787f18 |
1579 | CV * const ret = amtp->table[id]; |
3ad83ce7 |
1580 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1581 | /* Passing it through may have resulted in a warning |
1582 | "Inherited AUTOLOAD for a non-method deprecated", since |
1583 | our caller is going through a function call, not a method call. |
1584 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ |
890ce7af |
1585 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 |
1586 | |
1587 | if (gv && GvCV(gv)) |
1588 | return GvCV(gv); |
1589 | } |
1590 | return ret; |
1591 | } |
a0288114 |
1592 | |
601f1833 |
1593 | return NULL; |
32251b26 |
1594 | } |
1595 | |
1596 | |
a0d0e21e |
1597 | SV* |
864dbfa3 |
1598 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1599 | { |
27da23d5 |
1600 | dVAR; |
b267980d |
1601 | MAGIC *mg; |
9c5ffd7c |
1602 | CV *cv=NULL; |
a0d0e21e |
1603 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1604 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 |
1605 | int off = 0, off1, lr = 0, notfound = 0; |
1606 | int postpr = 0, force_cpy = 0; |
1607 | int assign = AMGf_assign & flags; |
1608 | const int assignshift = assign ? 1 : 0; |
497b47a8 |
1609 | #ifdef DEBUGGING |
1610 | int fl=0; |
497b47a8 |
1611 | #endif |
25716404 |
1612 | HV* stash=NULL; |
a0d0e21e |
1613 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 |
1614 | && (stash = SvSTASH(SvRV(left))) |
1615 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1616 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1617 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1618 | : (CV **) NULL)) |
b267980d |
1619 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1620 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1621 | * usual method */ |
497b47a8 |
1622 | ( |
1623 | #ifdef DEBUGGING |
1624 | fl = 1, |
a0288114 |
1625 | #endif |
497b47a8 |
1626 | cv = cvp[off=method])))) { |
a0d0e21e |
1627 | lr = -1; /* Call method for left argument */ |
1628 | } else { |
1629 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1630 | int logic; |
1631 | |
1632 | /* look for substituted methods */ |
ee239bfe |
1633 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1634 | switch (method) { |
1635 | case inc_amg: |
ee239bfe |
1636 | force_cpy = 1; |
1637 | if ((cv = cvp[off=add_ass_amg]) |
1638 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1639 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1640 | } |
1641 | break; |
1642 | case dec_amg: |
ee239bfe |
1643 | force_cpy = 1; |
1644 | if ((cv = cvp[off = subtr_ass_amg]) |
1645 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1646 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1647 | } |
1648 | break; |
1649 | case bool__amg: |
1650 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1651 | break; |
1652 | case numer_amg: |
1653 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1654 | break; |
1655 | case string_amg: |
1656 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1657 | break; |
b7787f18 |
1658 | case not_amg: |
1659 | (void)((cv = cvp[off=bool__amg]) |
1660 | || (cv = cvp[off=numer_amg]) |
1661 | || (cv = cvp[off=string_amg])); |
1662 | postpr = 1; |
1663 | break; |
748a9306 |
1664 | case copy_amg: |
1665 | { |
76e3520e |
1666 | /* |
1667 | * SV* ref causes confusion with the interpreter variable of |
1668 | * the same name |
1669 | */ |
890ce7af |
1670 | SV* const tmpRef=SvRV(left); |
76e3520e |
1671 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1672 | /* |
1673 | * Just to be extra cautious. Maybe in some |
1674 | * additional cases sv_setsv is safe, too. |
1675 | */ |
890ce7af |
1676 | SV* const newref = newSVsv(tmpRef); |
748a9306 |
1677 | SvOBJECT_on(newref); |
b162af07 |
1678 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 |
1679 | return newref; |
1680 | } |
1681 | } |
1682 | break; |
a0d0e21e |
1683 | case abs_amg: |
b267980d |
1684 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1685 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af |
1686 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1687 | if (off1==lt_amg) { |
890ce7af |
1688 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1689 | lt_amg,AMGf_noright); |
1690 | logic = SvTRUE(lessp); |
1691 | } else { |
890ce7af |
1692 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e |
1693 | ncmp_amg,AMGf_noright); |
1694 | logic = (SvNV(lessp) < 0); |
1695 | } |
1696 | if (logic) { |
1697 | if (off==subtr_amg) { |
1698 | right = left; |
748a9306 |
1699 | left = nullsv; |
a0d0e21e |
1700 | lr = 1; |
1701 | } |
1702 | } else { |
1703 | return left; |
1704 | } |
1705 | } |
1706 | break; |
1707 | case neg_amg: |
155aba94 |
1708 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1709 | right = left; |
1710 | left = sv_2mortal(newSViv(0)); |
1711 | lr = 1; |
1712 | } |
1713 | break; |
f216259d |
1714 | case int_amg: |
f5284f61 |
1715 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1716 | /* FAIL safe */ |
1717 | return NULL; /* Delegate operation to standard mechanisms. */ |
1718 | break; |
f5284f61 |
1719 | case to_sv_amg: |
1720 | case to_av_amg: |
1721 | case to_hv_amg: |
1722 | case to_gv_amg: |
1723 | case to_cv_amg: |
1724 | /* FAIL safe */ |
b267980d |
1725 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1726 | break; |
a0d0e21e |
1727 | default: |
1728 | goto not_found; |
1729 | } |
1730 | if (!cv) goto not_found; |
1731 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
25716404 |
1732 | && (stash = SvSTASH(SvRV(right))) |
1733 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) |
b267980d |
1734 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1735 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1736 | : (CV **) NULL)) |
a0d0e21e |
1737 | && (cv = cvp[off=method])) { /* Method for right |
1738 | * argument found */ |
1739 | lr=1; |
b267980d |
1740 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1741 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1742 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1743 | && !(flags & AMGf_unary)) { |
1744 | /* We look for substitution for |
1745 | * comparison operations and |
fc36a67e |
1746 | * concatenation */ |
a0d0e21e |
1747 | if (method==concat_amg || method==concat_ass_amg |
1748 | || method==repeat_amg || method==repeat_ass_amg) { |
1749 | return NULL; /* Delegate operation to string conversion */ |
1750 | } |
1751 | off = -1; |
1752 | switch (method) { |
1753 | case lt_amg: |
1754 | case le_amg: |
1755 | case gt_amg: |
1756 | case ge_amg: |
1757 | case eq_amg: |
1758 | case ne_amg: |
1759 | postpr = 1; off=ncmp_amg; break; |
1760 | case slt_amg: |
1761 | case sle_amg: |
1762 | case sgt_amg: |
1763 | case sge_amg: |
1764 | case seq_amg: |
1765 | case sne_amg: |
1766 | postpr = 1; off=scmp_amg; break; |
1767 | } |
1768 | if (off != -1) cv = cvp[off]; |
1769 | if (!cv) { |
1770 | goto not_found; |
1771 | } |
1772 | } else { |
a6006777 |
1773 | not_found: /* No method found, either report or croak */ |
b267980d |
1774 | switch (method) { |
1775 | case to_sv_amg: |
1776 | case to_av_amg: |
1777 | case to_hv_amg: |
1778 | case to_gv_amg: |
1779 | case to_cv_amg: |
1780 | /* FAIL safe */ |
1781 | return left; /* Delegate operation to standard mechanisms. */ |
1782 | break; |
1783 | } |
a0d0e21e |
1784 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1785 | notfound = 1; lr = -1; |
1786 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1787 | notfound = 1; lr = 1; |
1788 | } else { |
46fc3d4c |
1789 | SV *msg; |
774d564b |
1790 | if (off==-1) off=method; |
b267980d |
1791 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 |
1792 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 |
1793 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1794 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1795 | SvAMAGIC(left)? |
a0d0e21e |
1796 | "in overloaded package ": |
1797 | "has no overloaded magic", |
b267980d |
1798 | SvAMAGIC(left)? |
bfcb3514 |
1799 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e |
1800 | "", |
b267980d |
1801 | SvAMAGIC(right)? |
e7ea3e70 |
1802 | ",\n\tright argument in overloaded package ": |
b267980d |
1803 | (flags & AMGf_unary |
e7ea3e70 |
1804 | ? "" |
1805 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1806 | SvAMAGIC(right)? |
bfcb3514 |
1807 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c |
1808 | "")); |
a0d0e21e |
1809 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 |
1810 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e |
1811 | } else { |
894356b3 |
1812 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1813 | } |
1814 | return NULL; |
1815 | } |
ee239bfe |
1816 | force_cpy = force_cpy || assign; |
a0d0e21e |
1817 | } |
1818 | } |
497b47a8 |
1819 | #ifdef DEBUGGING |
a0d0e21e |
1820 | if (!notfound) { |
497b47a8 |
1821 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 |
1822 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 |
1823 | AMG_id2name(off), |
1824 | method+assignshift==off? "" : |
a0288114 |
1825 | " (initially \"", |
497b47a8 |
1826 | method+assignshift==off? "" : |
1827 | AMG_id2name(method+assignshift), |
a0288114 |
1828 | method+assignshift==off? "" : "\")", |
497b47a8 |
1829 | flags & AMGf_unary? "" : |
1830 | lr==1 ? " for right argument": " for left argument", |
1831 | flags & AMGf_unary? " for argument" : "", |
bfcb3514 |
1832 | stash ? HvNAME_get(stash) : "null", |
497b47a8 |
1833 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1834 | } |
497b47a8 |
1835 | #endif |
748a9306 |
1836 | /* Since we use shallow copy during assignment, we need |
1837 | * to dublicate the contents, probably calling user-supplied |
1838 | * version of copy operator |
1839 | */ |
ee239bfe |
1840 | /* We need to copy in following cases: |
1841 | * a) Assignment form was called. |
1842 | * assignshift==1, assign==T, method + 1 == off |
1843 | * b) Increment or decrement, called directly. |
1844 | * assignshift==0, assign==0, method + 0 == off |
1845 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1846 | * assignshift==0, assign==T, |
ee239bfe |
1847 | * force_cpy == T |
1848 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1849 | * assignshift==0, assign==0, |
ee239bfe |
1850 | * force_cpy == T |
1851 | * e) Assignment form translated to nomethod. |
1852 | * assignshift==1, assign==T, method + 1 != off |
1853 | * force_cpy == T |
1854 | */ |
1855 | /* off is method, method+assignshift, or a result of opcode substitution. |
1856 | * In the latter case assignshift==0, so only notfound case is important. |
1857 | */ |
1858 | if (( (method + assignshift == off) |
1859 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1860 | || force_cpy) |
1861 | RvDEEPCP(left); |
a0d0e21e |
1862 | { |
1863 | dSP; |
1864 | BINOP myop; |
1865 | SV* res; |
b7787f18 |
1866 | const bool oldcatch = CATCH_GET; |
a0d0e21e |
1867 | |
54310121 |
1868 | CATCH_SET(TRUE); |
a0d0e21e |
1869 | Zero(&myop, 1, BINOP); |
1870 | myop.op_last = (OP *) &myop; |
1871 | myop.op_next = Nullop; |
54310121 |
1872 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1873 | |
e788e7d3 |
1874 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1875 | ENTER; |
462e5cf6 |
1876 | SAVEOP(); |
533c011a |
1877 | PL_op = (OP *) &myop; |
3280af22 |
1878 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1879 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1880 | PUTBACK; |
cea2e8a9 |
1881 | pp_pushmark(); |
a0d0e21e |
1882 | |
924508f0 |
1883 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1884 | PUSHs(lr>0? right: left); |
1885 | PUSHs(lr>0? left: right); |
3280af22 |
1886 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1887 | if (notfound) { |
89ffc314 |
1888 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1889 | } |
1890 | PUSHs((SV*)cv); |
1891 | PUTBACK; |
1892 | |
155aba94 |
1893 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1894 | CALLRUNOPS(aTHX); |
a0d0e21e |
1895 | LEAVE; |
1896 | SPAGAIN; |
1897 | |
1898 | res=POPs; |
ebafeae7 |
1899 | PUTBACK; |
d3acc0f7 |
1900 | POPSTACK; |
54310121 |
1901 | CATCH_SET(oldcatch); |
a0d0e21e |
1902 | |
a0d0e21e |
1903 | if (postpr) { |
b7787f18 |
1904 | int ans; |
a0d0e21e |
1905 | switch (method) { |
1906 | case le_amg: |
1907 | case sle_amg: |
1908 | ans=SvIV(res)<=0; break; |
1909 | case lt_amg: |
1910 | case slt_amg: |
1911 | ans=SvIV(res)<0; break; |
1912 | case ge_amg: |
1913 | case sge_amg: |
1914 | ans=SvIV(res)>=0; break; |
1915 | case gt_amg: |
1916 | case sgt_amg: |
1917 | ans=SvIV(res)>0; break; |
1918 | case eq_amg: |
1919 | case seq_amg: |
1920 | ans=SvIV(res)==0; break; |
1921 | case ne_amg: |
1922 | case sne_amg: |
1923 | ans=SvIV(res)!=0; break; |
1924 | case inc_amg: |
1925 | case dec_amg: |
bbce6d69 |
1926 | SvSetSV(left,res); return left; |
dc437b57 |
1927 | case not_amg: |
fe7ac86a |
1928 | ans=!SvTRUE(res); break; |
b7787f18 |
1929 | default: |
1930 | ans=0; break; |
a0d0e21e |
1931 | } |
54310121 |
1932 | return boolSV(ans); |
748a9306 |
1933 | } else if (method==copy_amg) { |
1934 | if (!SvROK(res)) { |
cea2e8a9 |
1935 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1936 | } |
1937 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1938 | } else { |
1939 | return res; |
1940 | } |
1941 | } |
1942 | } |
c9d5ac95 |
1943 | |
1944 | /* |
7fc63493 |
1945 | =for apidoc is_gv_magical_sv |
c9d5ac95 |
1946 | |
7a5fd60d |
1947 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
1948 | |
1949 | =cut |
1950 | */ |
1951 | |
1952 | bool |
1953 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) |
1954 | { |
1955 | STRLEN len; |
b64e5050 |
1956 | const char * const temp = SvPV_const(name, len); |
7a5fd60d |
1957 | return is_gv_magical(temp, len, flags); |
1958 | } |
1959 | |
1960 | /* |
1961 | =for apidoc is_gv_magical |
1962 | |
c9d5ac95 |
1963 | Returns C<TRUE> if given the name of a magical GV. |
1964 | |
1965 | Currently only useful internally when determining if a GV should be |
1966 | created even in rvalue contexts. |
1967 | |
1968 | C<flags> is not used at present but available for future extension to |
1969 | allow selecting particular classes of magical variable. |
1970 | |
b9b0e72c |
1971 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
1972 | This assumption is met by all callers within the perl core, which all pass |
1973 | pointers returned by SvPV. |
1974 | |
c9d5ac95 |
1975 | =cut |
1976 | */ |
1977 | bool |
7fc63493 |
1978 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 |
1979 | { |
9d4ba2ae |
1980 | PERL_UNUSED_ARG(flags); |
1981 | |
b9b0e72c |
1982 | if (len > 1) { |
b464bac0 |
1983 | const char * const name1 = name + 1; |
b9b0e72c |
1984 | switch (*name) { |
1985 | case 'I': |
9431620d |
1986 | if (len == 3 && name1[1] == 'S' && name[2] == 'A') |
b9b0e72c |
1987 | goto yes; |
1988 | break; |
1989 | case 'O': |
9431620d |
1990 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c |
1991 | goto yes; |
1992 | break; |
1993 | case 'S': |
9431620d |
1994 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c |
1995 | goto yes; |
1996 | break; |
1997 | /* Using ${^...} variables is likely to be sufficiently rare that |
1998 | it seems sensible to avoid the space hit of also checking the |
1999 | length. */ |
2000 | case '\017': /* ${^OPEN} */ |
9431620d |
2001 | if (strEQ(name1, "PEN")) |
b9b0e72c |
2002 | goto yes; |
2003 | break; |
2004 | case '\024': /* ${^TAINT} */ |
9431620d |
2005 | if (strEQ(name1, "AINT")) |
b9b0e72c |
2006 | goto yes; |
2007 | break; |
2008 | case '\025': /* ${^UNICODE} */ |
9431620d |
2009 | if (strEQ(name1, "NICODE")) |
b9b0e72c |
2010 | goto yes; |
a0288114 |
2011 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 |
2012 | goto yes; |
b9b0e72c |
2013 | break; |
2014 | case '\027': /* ${^WARNING_BITS} */ |
9431620d |
2015 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c |
2016 | goto yes; |
2017 | break; |
2018 | case '1': |
2019 | case '2': |
2020 | case '3': |
2021 | case '4': |
2022 | case '5': |
2023 | case '6': |
2024 | case '7': |
2025 | case '8': |
2026 | case '9': |
c9d5ac95 |
2027 | { |
7fc63493 |
2028 | const char *end = name + len; |
c9d5ac95 |
2029 | while (--end > name) { |
2030 | if (!isDIGIT(*end)) |
2031 | return FALSE; |
2032 | } |
b9b0e72c |
2033 | goto yes; |
2034 | } |
2035 | } |
2036 | } else { |
2037 | /* Because we're already assuming that name is NUL terminated |
2038 | below, we can treat an empty name as "\0" */ |
2039 | switch (*name) { |
2040 | case '&': |
2041 | case '`': |
2042 | case '\'': |
2043 | case ':': |
2044 | case '?': |
2045 | case '!': |
2046 | case '-': |
2047 | case '#': |
2048 | case '[': |
2049 | case '^': |
2050 | case '~': |
2051 | case '=': |
2052 | case '%': |
2053 | case '.': |
2054 | case '(': |
2055 | case ')': |
2056 | case '<': |
2057 | case '>': |
2058 | case ',': |
2059 | case '\\': |
2060 | case '/': |
2061 | case '|': |
2062 | case '+': |
2063 | case ';': |
2064 | case ']': |
2065 | case '\001': /* $^A */ |
2066 | case '\003': /* $^C */ |
2067 | case '\004': /* $^D */ |
2068 | case '\005': /* $^E */ |
2069 | case '\006': /* $^F */ |
2070 | case '\010': /* $^H */ |
2071 | case '\011': /* $^I, NOT \t in EBCDIC */ |
2072 | case '\014': /* $^L */ |
2073 | case '\016': /* $^N */ |
2074 | case '\017': /* $^O */ |
2075 | case '\020': /* $^P */ |
2076 | case '\023': /* $^S */ |
2077 | case '\024': /* $^T */ |
2078 | case '\026': /* $^V */ |
2079 | case '\027': /* $^W */ |
2080 | case '1': |
2081 | case '2': |
2082 | case '3': |
2083 | case '4': |
2084 | case '5': |
2085 | case '6': |
2086 | case '7': |
2087 | case '8': |
2088 | case '9': |
2089 | yes: |
2090 | return TRUE; |
2091 | default: |
2092 | break; |
c9d5ac95 |
2093 | } |
c9d5ac95 |
2094 | } |
2095 | return FALSE; |
2096 | } |
66610fdd |
2097 | |
2098 | /* |
2099 | * Local variables: |
2100 | * c-indentation-style: bsd |
2101 | * c-basic-offset: 4 |
2102 | * indent-tabs-mode: t |
2103 | * End: |
2104 | * |
37442d52 |
2105 | * ex: set ts=8 sts=4 sw=4 noet: |
2106 | */ |