Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
4bb101f2 | 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
fdf8c088 | 4 | * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, by Larry Wall and others |
79072805 LW |
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 LW |
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 LW |
18 | */ |
19 | ||
ccfc67b7 JH |
20 | /* |
21 | =head1 GV Functions | |
166f8a29 DM |
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 JH |
31 | */ |
32 | ||
79072805 | 33 | #include "EXTERN.h" |
864dbfa3 | 34 | #define PERL_IN_GV_C |
79072805 LW |
35 | #include "perl.h" |
36 | ||
f54cb97a AL |
37 | static const char S_autoload[] = "AUTOLOAD"; |
38 | static const STRLEN S_autolen = sizeof(S_autoload)-1; | |
5c7983e5 | 39 | |
c69033f2 NC |
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 NC |
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 LW |
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 LW |
70 | return gv; |
71 | } | |
72 | ||
73 | GV * | |
864dbfa3 | 74 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e | 75 | { |
97aff369 | 76 | dVAR; |
8b5be85c SP |
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 = |
666ea192 JH |
84 | PL_op->op_type == OP_READDIR || |
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"; | |
8b5be85c SP |
90 | Perl_croak(aTHX_ "Bad symbol for %s", fh); |
91 | } | |
92 | ||
5bd07a3d | 93 | if (!GvIOp(gv)) { |
7fb37951 AMS |
94 | #ifdef GV_UNIQUE_CHECK |
95 | if (GvUNIQUE(gv)) { | |
96 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); | |
5bd07a3d DM |
97 | } |
98 | #endif | |
a0d0e21e | 99 | GvIOp(gv) = newIO(); |
5bd07a3d | 100 | } |
a0d0e21e LW |
101 | return gv; |
102 | } | |
103 | ||
104 | GV * | |
864dbfa3 | 105 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 106 | { |
d9095cec NC |
107 | return gv_fetchfile_flags(name, strlen(name), 0); |
108 | } | |
109 | ||
110 | GV * | |
111 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
112 | const U32 flags) | |
113 | { | |
97aff369 | 114 | dVAR; |
4116122e | 115 | char smallbuf[128]; |
53d95988 | 116 | char *tmpbuf; |
d9095cec | 117 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
118 | GV *gv; |
119 | ||
d9095cec NC |
120 | PERL_UNUSED_ARG(flags); |
121 | ||
1d7c1841 | 122 | if (!PL_defstash) |
a0714e2c | 123 | return NULL; |
1d7c1841 | 124 | |
d9095cec | 125 | if (tmplen <= sizeof smallbuf) |
53d95988 CS |
126 | tmpbuf = smallbuf; |
127 | else | |
798b63bc | 128 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 129 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
130 | tmpbuf[0] = '_'; |
131 | tmpbuf[1] = '<'; | |
d9095cec NC |
132 | memcpy(tmpbuf + 2, name, namelen); |
133 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); | |
1d7c1841 | 134 | if (!isGV(gv)) { |
d9095cec | 135 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 | 136 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec | 137 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 138 | #else |
d9095cec | 139 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 140 | #endif |
1d7c1841 | 141 | if (PERLDB_LINE) |
a0714e2c | 142 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); |
1d7c1841 | 143 | } |
53d95988 CS |
144 | if (tmpbuf != smallbuf) |
145 | Safefree(tmpbuf); | |
79072805 LW |
146 | return gv; |
147 | } | |
148 | ||
62d55b22 NC |
149 | /* |
150 | =for apidoc gv_const_sv | |
151 | ||
152 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
153 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
154 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
155 | NULL. | |
156 | ||
157 | =cut | |
158 | */ | |
159 | ||
160 | SV * | |
161 | Perl_gv_const_sv(pTHX_ GV *gv) | |
162 | { | |
163 | if (SvTYPE(gv) == SVt_PVGV) | |
164 | return cv_const_sv(GvCVu(gv)); | |
165 | return SvROK(gv) ? SvRV(gv) : NULL; | |
166 | } | |
167 | ||
12816592 NC |
168 | GP * |
169 | Perl_newGP(pTHX_ GV *const gv) | |
170 | { | |
171 | GP *gp; | |
1df5f7c1 NC |
172 | const char *const file |
173 | = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : ""; | |
f4890806 NC |
174 | STRLEN len = strlen(file); |
175 | U32 hash; | |
176 | ||
177 | PERL_HASH(hash, file, len); | |
178 | ||
12816592 NC |
179 | Newxz(gp, 1, GP); |
180 | ||
181 | #ifndef PERL_DONT_CREATE_GVSV | |
b5c2dcb8 | 182 | gp->gp_sv = newSV(0); |
12816592 NC |
183 | #endif |
184 | ||
1df5f7c1 | 185 | gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0; |
12816592 NC |
186 | /* XXX Ideally this cast would be replaced with a change to const char* |
187 | in the struct. */ | |
f4890806 | 188 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
189 | gp->gp_egv = gv; |
190 | gp->gp_refcnt = 1; | |
191 | ||
192 | return gp; | |
193 | } | |
194 | ||
463ee0b2 | 195 | void |
864dbfa3 | 196 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 | 197 | { |
27da23d5 | 198 | dVAR; |
3b6733bf NC |
199 | const U32 old_type = SvTYPE(gv); |
200 | const bool doproto = old_type > SVt_NULL; | |
b15aece3 | 201 | const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL; |
756cb477 | 202 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 203 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 NC |
204 | |
205 | assert (!(proto && has_constant)); | |
206 | ||
207 | if (has_constant) { | |
5c1f4d79 NC |
208 | /* The constant has to be a simple scalar type. */ |
209 | switch (SvTYPE(has_constant)) { | |
210 | case SVt_PVAV: | |
211 | case SVt_PVHV: | |
212 | case SVt_PVCV: | |
213 | case SVt_PVFM: | |
214 | case SVt_PVIO: | |
215 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
216 | sv_reftype(has_constant, 0)); | |
42d0e0b7 | 217 | default: NOOP; |
5c1f4d79 | 218 | } |
756cb477 NC |
219 | SvRV_set(gv, NULL); |
220 | SvROK_off(gv); | |
221 | } | |
463ee0b2 | 222 | |
3b6733bf NC |
223 | |
224 | if (old_type < SVt_PVGV) { | |
225 | if (old_type >= SVt_PV) | |
226 | SvCUR_set(gv, 0); | |
227 | sv_upgrade((SV*)gv, SVt_PVGV); | |
228 | } | |
55d729e4 GS |
229 | if (SvLEN(gv)) { |
230 | if (proto) { | |
f880fe2f | 231 | SvPV_set(gv, NULL); |
b162af07 | 232 | SvLEN_set(gv, 0); |
55d729e4 GS |
233 | SvPOK_off(gv); |
234 | } else | |
94010e71 | 235 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 236 | } |
2e5b91de NC |
237 | SvIOK_off(gv); |
238 | isGV_with_GP_on(gv); | |
12816592 NC |
239 | |
240 | GvGP(gv) = Perl_newGP(aTHX_ gv); | |
e15faf7d NC |
241 | GvSTASH(gv) = stash; |
242 | if (stash) | |
243 | Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv); | |
ae8cc45f | 244 | gv_name_set(gv, name, len, GV_ADD); |
23ad5bf5 | 245 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 | 246 | GvMULTI_on(gv); |
55d729e4 GS |
247 | if (doproto) { /* Replicate part of newSUB here. */ |
248 | ENTER; | |
756cb477 NC |
249 | if (has_constant) { |
250 | /* newCONSTSUB takes ownership of the reference from us. */ | |
251 | GvCV(gv) = newCONSTSUB(stash, name, has_constant); | |
1ccdb730 NC |
252 | /* If this reference was a copy of another, then the subroutine |
253 | must have been "imported", by a Perl space assignment to a GV | |
254 | from a reference to CV. */ | |
255 | if (exported_constant) | |
256 | GvIMPORTED_CV_on(gv); | |
756cb477 | 257 | } else { |
756cb477 NC |
258 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
259 | GvCV(gv) = PL_compcv; | |
260 | } | |
55d729e4 GS |
261 | LEAVE; |
262 | ||
e1a479c5 | 263 | mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */ |
65c50114 | 264 | CvGV(GvCV(gv)) = gv; |
e0d088d0 | 265 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 | 266 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 GS |
267 | if (proto) { |
268 | sv_setpv((SV*)GvCV(gv), proto); | |
269 | Safefree(proto); | |
270 | } | |
271 | } | |
463ee0b2 LW |
272 | } |
273 | ||
76e3520e | 274 | STATIC void |
cea2e8a9 | 275 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e LW |
276 | { |
277 | switch (sv_type) { | |
278 | case SVt_PVIO: | |
279 | (void)GvIOn(gv); | |
280 | break; | |
281 | case SVt_PVAV: | |
282 | (void)GvAVn(gv); | |
283 | break; | |
284 | case SVt_PVHV: | |
285 | (void)GvHVn(gv); | |
286 | break; | |
c69033f2 NC |
287 | #ifdef PERL_DONT_CREATE_GVSV |
288 | case SVt_NULL: | |
289 | case SVt_PVCV: | |
290 | case SVt_PVFM: | |
e654831b | 291 | case SVt_PVGV: |
c69033f2 NC |
292 | break; |
293 | default: | |
dbdce04c NC |
294 | if(GvSVn(gv)) { |
295 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
296 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
297 | its side effect */ | |
298 | } | |
c69033f2 | 299 | #endif |
a0d0e21e LW |
300 | } |
301 | } | |
302 | ||
954c1994 GS |
303 | /* |
304 | =for apidoc gv_fetchmeth | |
305 | ||
306 | Returns the glob with the given C<name> and a defined subroutine or | |
307 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
07766739 | 308 | accessible via @ISA and UNIVERSAL::. |
954c1994 GS |
309 | |
310 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
311 | side-effect creates a glob with the given C<name> in the given C<stash> | |
312 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 313 | up caching info for this glob. |
954c1994 GS |
314 | |
315 | This function grants C<"SUPER"> token as a postfix of the stash name. The | |
316 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not | |
4929bf7b | 317 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 318 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 319 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
320 | |
321 | =cut | |
322 | */ | |
323 | ||
e1a479c5 BB |
324 | /* NOTE: No support for tied ISA */ |
325 | ||
79072805 | 326 | GV * |
864dbfa3 | 327 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 | 328 | { |
97aff369 | 329 | dVAR; |
463ee0b2 | 330 | GV** gvp; |
e1a479c5 BB |
331 | AV* linear_av; |
332 | SV** linear_svp; | |
333 | SV* linear_sv; | |
334 | HV* cstash; | |
335 | GV* candidate = NULL; | |
336 | CV* cand_cv = NULL; | |
337 | CV* old_cv; | |
338 | GV* topgv = NULL; | |
bfcb3514 | 339 | const char *hvname; |
e1a479c5 BB |
340 | I32 create = (level >= 0) ? 1 : 0; |
341 | I32 items; | |
342 | STRLEN packlen; | |
343 | U32 topgen_cmp; | |
a0d0e21e | 344 | |
af09ea45 IK |
345 | /* UNIVERSAL methods should be callable without a stash */ |
346 | if (!stash) { | |
e1a479c5 | 347 | create = 0; /* probably appropriate */ |
da51bb9b | 348 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
349 | return 0; |
350 | } | |
351 | ||
e1a479c5 BB |
352 | assert(stash); |
353 | ||
bfcb3514 NC |
354 | hvname = HvNAME_get(stash); |
355 | if (!hvname) | |
e1a479c5 | 356 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 357 | |
e1a479c5 BB |
358 | assert(hvname); |
359 | assert(name); | |
463ee0b2 | 360 | |
bfcb3514 | 361 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a | 362 | |
dd69841b | 363 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 BB |
364 | |
365 | /* check locally for a real method or a cache entry */ | |
366 | gvp = (GV**)hv_fetch(stash, name, len, create); | |
367 | if(gvp) { | |
368 | topgv = *gvp; | |
369 | assert(topgv); | |
370 | if (SvTYPE(topgv) != SVt_PVGV) | |
371 | gv_init(topgv, stash, name, len, TRUE); | |
372 | if ((cand_cv = GvCV(topgv))) { | |
373 | /* If genuine method or valid cache entry, use it */ | |
374 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
375 | return topgv; | |
376 | } | |
377 | else { | |
378 | /* stale cache entry, junk it and move on */ | |
379 | SvREFCNT_dec(cand_cv); | |
380 | GvCV(topgv) = cand_cv = NULL; | |
381 | GvCVGEN(topgv) = 0; | |
382 | } | |
383 | } | |
384 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
385 | /* cache indicates no such method definitively */ | |
386 | return 0; | |
387 | } | |
463ee0b2 | 388 | } |
79072805 | 389 | |
e1a479c5 BB |
390 | packlen = HvNAMELEN_get(stash); |
391 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { | |
392 | HV* basestash; | |
393 | packlen -= 7; | |
394 | basestash = gv_stashpvn(hvname, packlen, GV_ADD); | |
395 | linear_av = mro_get_linear_isa(basestash); | |
9607fc9c | 396 | } |
e1a479c5 BB |
397 | else { |
398 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ | |
79072805 | 399 | } |
a0d0e21e | 400 | |
e1a479c5 BB |
401 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
402 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
403 | while (items--) { | |
404 | linear_sv = *linear_svp++; | |
405 | assert(linear_sv); | |
406 | cstash = gv_stashsv(linear_sv, 0); | |
407 | ||
dd69841b | 408 | if (!cstash) { |
b0c482e3 RGS |
409 | if (ckWARN(WARN_SYNTAX)) |
410 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA", | |
e1a479c5 BB |
411 | SVfARG(linear_sv), hvname); |
412 | continue; | |
413 | } | |
9607fc9c | 414 | |
e1a479c5 BB |
415 | assert(cstash); |
416 | ||
417 | gvp = (GV**)hv_fetch(cstash, name, len, 0); | |
418 | if (!gvp) continue; | |
419 | candidate = *gvp; | |
420 | assert(candidate); | |
421 | if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE); | |
422 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { | |
423 | /* | |
424 | * Found real method, cache method in topgv if: | |
425 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
426 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
427 | */ | |
428 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
429 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); | |
430 | SvREFCNT_inc_simple_void_NN(cand_cv); | |
431 | GvCV(topgv) = cand_cv; | |
432 | GvCVGEN(topgv) = topgen_cmp; | |
433 | } | |
434 | return candidate; | |
435 | } | |
436 | } | |
9607fc9c | 437 | |
e1a479c5 BB |
438 | /* Check UNIVERSAL without caching */ |
439 | if(level == 0 || level == -1) { | |
440 | candidate = gv_fetchmeth(NULL, name, len, 1); | |
441 | if(candidate) { | |
442 | cand_cv = GvCV(candidate); | |
443 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
444 | if ((old_cv = GvCV(topgv))) SvREFCNT_dec(old_cv); | |
445 | SvREFCNT_inc_simple_void_NN(cand_cv); | |
446 | GvCV(topgv) = cand_cv; | |
447 | GvCVGEN(topgv) = topgen_cmp; | |
448 | } | |
449 | return candidate; | |
450 | } | |
451 | } | |
452 | ||
453 | if (topgv && GvREFCNT(topgv) == 1) { | |
454 | /* cache the fact that the method is not defined */ | |
455 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
456 | } |
457 | ||
79072805 LW |
458 | return 0; |
459 | } | |
460 | ||
954c1994 | 461 | /* |
611c1e95 IZ |
462 | =for apidoc gv_fetchmeth_autoload |
463 | ||
464 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. | |
465 | Returns a glob for the subroutine. | |
466 | ||
467 | For an autoloaded subroutine without a GV, will create a GV even | |
468 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() | |
469 | of the result may be zero. | |
470 | ||
471 | =cut | |
472 | */ | |
473 | ||
474 | GV * | |
475 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) | |
476 | { | |
477 | GV *gv = gv_fetchmeth(stash, name, len, level); | |
478 | ||
479 | if (!gv) { | |
611c1e95 IZ |
480 | CV *cv; |
481 | GV **gvp; | |
482 | ||
483 | if (!stash) | |
6136c704 | 484 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
5c7983e5 | 485 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
6136c704 | 486 | return NULL; |
5c7983e5 | 487 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 | 488 | return NULL; |
611c1e95 IZ |
489 | cv = GvCV(gv); |
490 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 491 | return NULL; |
611c1e95 IZ |
492 | /* Have an autoload */ |
493 | if (level < 0) /* Cannot do without a stub */ | |
494 | gv_fetchmeth(stash, name, len, 0); | |
495 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
496 | if (!gvp) | |
6136c704 | 497 | return NULL; |
611c1e95 IZ |
498 | return *gvp; |
499 | } | |
500 | return gv; | |
501 | } | |
502 | ||
503 | /* | |
954c1994 GS |
504 | =for apidoc gv_fetchmethod_autoload |
505 | ||
506 | Returns the glob which contains the subroutine to call to invoke the method | |
507 | on the C<stash>. In fact in the presence of autoloading this may be the | |
508 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is | |
b267980d | 509 | already setup. |
954c1994 GS |
510 | |
511 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
512 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 513 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 514 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 515 | with a non-zero C<autoload> parameter. |
954c1994 GS |
516 | |
517 | These functions grant C<"SUPER"> token as a prefix of the method name. Note | |
518 | that if you want to keep the returned glob for a long time, you need to | |
519 | check for it being "AUTOLOAD", since at the later time the call may load a | |
520 | different subroutine due to $AUTOLOAD changing its value. Use the glob | |
b267980d | 521 | created via a side effect to do this. |
954c1994 GS |
522 | |
523 | These functions have the same side-effects and as C<gv_fetchmeth> with | |
524 | C<level==0>. C<name> should be writable if contains C<':'> or C<' | |
525 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to | |
b267980d | 526 | C<call_sv> apply equally to these functions. |
954c1994 GS |
527 | |
528 | =cut | |
529 | */ | |
530 | ||
7d3b1f61 BB |
531 | STATIC HV* |
532 | S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen) | |
533 | { | |
534 | AV* superisa; | |
535 | GV** gvp; | |
536 | GV* gv; | |
537 | HV* stash; | |
538 | ||
539 | stash = gv_stashpvn(name, namelen, 0); | |
540 | if(stash) return stash; | |
541 | ||
542 | /* If we must create it, give it an @ISA array containing | |
543 | the real package this SUPER is for, so that it's tied | |
544 | into the cache invalidation code correctly */ | |
545 | stash = gv_stashpvn(name, namelen, GV_ADD); | |
546 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); | |
547 | gv = *gvp; | |
548 | gv_init(gv, stash, "ISA", 3, TRUE); | |
549 | superisa = GvAVn(gv); | |
550 | GvMULTI_on(gv); | |
551 | sv_magic((SV*)superisa, (SV*)gv, PERL_MAGIC_isa, NULL, 0); | |
552 | av_push(superisa, newSVpv(CopSTASHPV(PL_curcop), 0)); | |
553 | ||
554 | return stash; | |
555 | } | |
556 | ||
dc848c6f | 557 | GV * |
864dbfa3 | 558 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 559 | { |
97aff369 | 560 | dVAR; |
08105a92 | 561 | register const char *nend; |
c445ea15 | 562 | const char *nsplit = NULL; |
a0d0e21e | 563 | GV* gv; |
0dae17bd GS |
564 | HV* ostash = stash; |
565 | ||
566 | if (stash && SvTYPE(stash) < SVt_PVHV) | |
5c284bb0 | 567 | stash = NULL; |
b267980d | 568 | |
463ee0b2 | 569 | for (nend = name; *nend; nend++) { |
9607fc9c | 570 | if (*nend == '\'') |
a0d0e21e | 571 | nsplit = nend; |
9607fc9c | 572 | else if (*nend == ':' && *(nend + 1) == ':') |
573 | nsplit = ++nend; | |
a0d0e21e LW |
574 | } |
575 | if (nsplit) { | |
9d4ba2ae | 576 | const char * const origname = name; |
a0d0e21e | 577 | name = nsplit + 1; |
a0d0e21e LW |
578 | if (*nsplit == ':') |
579 | --nsplit; | |
9607fc9c | 580 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
581 | /* ->SUPER::method should really be looked up in original stash */ | |
b37c2d43 | 582 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 | 583 | CopSTASHPV(PL_curcop))); |
af09ea45 | 584 | /* __PACKAGE__::SUPER stash should be autovivified */ |
7d3b1f61 | 585 | stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr)); |
cea2e8a9 | 586 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 | 587 | origname, HvNAME_get(stash), name) ); |
4633a7c4 | 588 | } |
e189a56d | 589 | else { |
af09ea45 | 590 | /* don't autovifify if ->NoSuchStash::method */ |
da51bb9b | 591 | stash = gv_stashpvn(origname, nsplit - origname, 0); |
e189a56d IK |
592 | |
593 | /* however, explicit calls to Pkg::SUPER::method may | |
594 | happen, and may require autovivification to work */ | |
595 | if (!stash && (nsplit - origname) >= 7 && | |
596 | strnEQ(nsplit - 7, "::SUPER", 7) && | |
da51bb9b | 597 | gv_stashpvn(origname, nsplit - origname - 7, 0)) |
7d3b1f61 | 598 | stash = gv_get_super_pkg(origname, nsplit - origname); |
e189a56d | 599 | } |
0dae17bd | 600 | ostash = stash; |
4633a7c4 LW |
601 | } |
602 | ||
9607fc9c | 603 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 604 | if (!gv) { |
2f6e0fe7 | 605 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 | 606 | gv = (GV*)&PL_sv_yes; |
dc848c6f | 607 | else if (autoload) |
0dae17bd | 608 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 | 609 | } |
dc848c6f | 610 | else if (autoload) { |
9d4ba2ae | 611 | CV* const cv = GvCV(gv); |
09280a33 CS |
612 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
613 | GV* stubgv; | |
614 | GV* autogv; | |
615 | ||
616 | if (CvANON(cv)) | |
617 | stubgv = gv; | |
618 | else { | |
619 | stubgv = CvGV(cv); | |
620 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
621 | stubgv = gv; | |
622 | } | |
623 | autogv = gv_autoload4(GvSTASH(stubgv), | |
624 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 625 | if (autogv) |
626 | gv = autogv; | |
627 | } | |
628 | } | |
44a8e56a | 629 | |
630 | return gv; | |
631 | } | |
632 | ||
633 | GV* | |
864dbfa3 | 634 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a | 635 | { |
27da23d5 | 636 | dVAR; |
44a8e56a | 637 | GV* gv; |
638 | CV* cv; | |
639 | HV* varstash; | |
640 | GV* vargv; | |
641 | SV* varsv; | |
e1ec3a88 | 642 | const char *packname = ""; |
eae70eaa | 643 | STRLEN packname_len = 0; |
44a8e56a | 644 | |
5c7983e5 | 645 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
a0714e2c | 646 | return NULL; |
0dae17bd GS |
647 | if (stash) { |
648 | if (SvTYPE(stash) < SVt_PVHV) { | |
e62f0680 | 649 | packname = SvPV_const((SV*)stash, packname_len); |
5c284bb0 | 650 | stash = NULL; |
0dae17bd GS |
651 | } |
652 | else { | |
bfcb3514 | 653 | packname = HvNAME_get(stash); |
7423f6db | 654 | packname_len = HvNAMELEN_get(stash); |
0dae17bd GS |
655 | } |
656 | } | |
5c7983e5 | 657 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c | 658 | return NULL; |
dc848c6f | 659 | cv = GvCV(gv); |
660 | ||
adb5a9ae | 661 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 662 | return NULL; |
ed850460 | 663 | |
dc848c6f | 664 | /* |
665 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
666 | */ | |
041457d9 DM |
667 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
668 | && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) | |
669 | ) | |
12bcd1a6 | 670 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f | 671 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd | 672 | packname, (int)len, name); |
44a8e56a | 673 | |
aed2304a | 674 | if (CvISXSUB(cv)) { |
adb5a9ae DM |
675 | /* rather than lookup/init $AUTOLOAD here |
676 | * only to have the XSUB do another lookup for $AUTOLOAD | |
677 | * and split that value on the last '::', | |
678 | * pass along the same data via some unused fields in the CV | |
679 | */ | |
680 | CvSTASH(cv) = stash; | |
f880fe2f | 681 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 | 682 | SvCUR_set(cv, len); |
adb5a9ae DM |
683 | return gv; |
684 | } | |
adb5a9ae | 685 | |
44a8e56a | 686 | /* |
687 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
688 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
689 | * use that, but for lack of anything better we will use the sub's | |
690 | * original package to look up $AUTOLOAD. | |
691 | */ | |
692 | varstash = GvSTASH(CvGV(cv)); | |
5c7983e5 | 693 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
694 | ENTER; |
695 | ||
c69033f2 | 696 | if (!isGV(vargv)) { |
5c7983e5 | 697 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 | 698 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 699 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
700 | #endif |
701 | } | |
3d35f11b | 702 | LEAVE; |
e203899d | 703 | varsv = GvSVn(vargv); |
7423f6db | 704 | sv_setpvn(varsv, packname, packname_len); |
396482e1 | 705 | sv_catpvs(varsv, "::"); |
44a8e56a | 706 | sv_catpvn(varsv, name, len); |
a0d0e21e LW |
707 | return gv; |
708 | } | |
709 | ||
44a2ac75 YO |
710 | |
711 | /* require_tie_mod() internal routine for requiring a module | |
712 | * that implements the logic of automatical ties like %! and %- | |
713 | * | |
714 | * The "gv" parameter should be the glob. | |
45cbc99a RGS |
715 | * "varpv" holds the name of the var, used for error messages. |
716 | * "namesv" holds the module name. Its refcount will be decremented. | |
44a2ac75 | 717 | * "methpv" holds the method name to test for to check that things |
45cbc99a RGS |
718 | * are working reasonably close to as expected. |
719 | * "flags": if flag & 1 then save the scalar before loading. | |
44a2ac75 YO |
720 | * For the protection of $! to work (it is set by this routine) |
721 | * the sv slot must already be magicalized. | |
d2c93421 | 722 | */ |
44a2ac75 YO |
723 | STATIC HV* |
724 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) | |
d2c93421 | 725 | { |
27da23d5 | 726 | dVAR; |
da51bb9b | 727 | HV* stash = gv_stashsv(namesv, 0); |
45cbc99a | 728 | |
44a2ac75 | 729 | if (!stash || !(gv_fetchmethod(stash, methpv))) { |
45cbc99a RGS |
730 | SV *module = newSVsv(namesv); |
731 | char varname = *varpv; /* varpv might be clobbered by load_module, | |
732 | so save it. For the moment it's always | |
733 | a single char. */ | |
d2c93421 | 734 | dSP; |
d2c93421 | 735 | ENTER; |
44a2ac75 | 736 | if ( flags & 1 ) |
45cbc99a | 737 | save_scalar(gv); |
cac54379 | 738 | PUSHSTACKi(PERLSI_MAGIC); |
45cbc99a | 739 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
cac54379 | 740 | POPSTACK; |
d2c93421 RH |
741 | LEAVE; |
742 | SPAGAIN; | |
da51bb9b | 743 | stash = gv_stashsv(namesv, 0); |
44a2ac75 | 744 | if (!stash) |
45cbc99a RGS |
745 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available", |
746 | varname, SVfARG(namesv)); | |
747 | else if (!gv_fetchmethod(stash, methpv)) | |
748 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s", | |
749 | varname, SVfARG(namesv), methpv); | |
d2c93421 | 750 | } |
45cbc99a | 751 | SvREFCNT_dec(namesv); |
44a2ac75 | 752 | return stash; |
d2c93421 RH |
753 | } |
754 | ||
954c1994 GS |
755 | /* |
756 | =for apidoc gv_stashpv | |
757 | ||
da51bb9b | 758 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 759 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
760 | |
761 | =cut | |
762 | */ | |
763 | ||
a0d0e21e | 764 | HV* |
864dbfa3 | 765 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 766 | { |
dc437b57 | 767 | return gv_stashpvn(name, strlen(name), create); |
768 | } | |
769 | ||
bc96cb06 SH |
770 | /* |
771 | =for apidoc gv_stashpvn | |
772 | ||
da51bb9b NC |
773 | Returns a pointer to the stash for a specified package. The C<namelen> |
774 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
775 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
776 | created if it does not already exist. If the package does not exist and | |
777 | C<flags> is 0 (or any other setting that does not create packages) then NULL | |
778 | is returned. | |
779 | ||
bc96cb06 SH |
780 | |
781 | =cut | |
782 | */ | |
783 | ||
dc437b57 | 784 | HV* |
da51bb9b | 785 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 786 | { |
0cea0058 | 787 | char smallbuf[128]; |
46fc3d4c | 788 | char *tmpbuf; |
a0d0e21e LW |
789 | HV *stash; |
790 | GV *tmpgv; | |
dc437b57 | 791 | |
798b63bc | 792 | if (namelen + 2 <= sizeof smallbuf) |
46fc3d4c | 793 | tmpbuf = smallbuf; |
794 | else | |
2ae0db35 | 795 | Newx(tmpbuf, namelen + 2, char); |
dc437b57 | 796 | Copy(name,tmpbuf,namelen,char); |
797 | tmpbuf[namelen++] = ':'; | |
798 | tmpbuf[namelen++] = ':'; | |
da51bb9b | 799 | tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, flags, SVt_PVHV); |
46fc3d4c | 800 | if (tmpbuf != smallbuf) |
801 | Safefree(tmpbuf); | |
a0d0e21e | 802 | if (!tmpgv) |
da51bb9b | 803 | return NULL; |
a0d0e21e LW |
804 | if (!GvHV(tmpgv)) |
805 | GvHV(tmpgv) = newHV(); | |
806 | stash = GvHV(tmpgv); | |
bfcb3514 | 807 | if (!HvNAME_get(stash)) |
51a37f80 | 808 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e | 809 | return stash; |
463ee0b2 LW |
810 | } |
811 | ||
954c1994 GS |
812 | /* |
813 | =for apidoc gv_stashsv | |
814 | ||
da51bb9b | 815 | Returns a pointer to the stash for a specified package. See C<gv_stashpvn>. |
954c1994 GS |
816 | |
817 | =cut | |
818 | */ | |
819 | ||
a0d0e21e | 820 | HV* |
da51bb9b | 821 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 822 | { |
dc437b57 | 823 | STRLEN len; |
9d4ba2ae | 824 | const char * const ptr = SvPV_const(sv,len); |
da51bb9b | 825 | return gv_stashpvn(ptr, len, flags); |
a0d0e21e LW |
826 | } |
827 | ||
828 | ||
463ee0b2 | 829 | GV * |
7a5fd60d | 830 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { |
b7787f18 | 831 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
832 | } |
833 | ||
834 | GV * | |
835 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) { | |
836 | STRLEN len; | |
9d4ba2ae | 837 | const char * const nambeg = SvPV_const(name, len); |
7a5fd60d NC |
838 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
839 | } | |
840 | ||
841 | GV * | |
842 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
843 | I32 sv_type) | |
79072805 | 844 | { |
97aff369 | 845 | dVAR; |
08105a92 | 846 | register const char *name = nambeg; |
c445ea15 | 847 | register GV *gv = NULL; |
79072805 | 848 | GV**gvp; |
79072805 | 849 | I32 len; |
b3d904f3 | 850 | register const char *name_cursor; |
c445ea15 | 851 | HV *stash = NULL; |
add2581e | 852 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a | 853 | const I32 no_expand = flags & GV_NOEXPAND; |
780a5241 | 854 | const I32 add = flags & ~GV_NOADD_MASK; |
b3d904f3 NC |
855 | const char *const name_end = nambeg + full_len; |
856 | const char *const name_em1 = name_end - 1; | |
79072805 | 857 | |
fafc274c NC |
858 | if (flags & GV_NOTQUAL) { |
859 | /* Caller promised that there is no stash, so we can skip the check. */ | |
860 | len = full_len; | |
861 | goto no_stash; | |
862 | } | |
863 | ||
b208e10c NC |
864 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
865 | /* accidental stringify on a GV? */ | |
c07a80fd | 866 | name++; |
b208e10c | 867 | } |
c07a80fd | 868 | |
b3d904f3 NC |
869 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
870 | if ((*name_cursor == ':' && name_cursor < name_em1 | |
871 | && name_cursor[1] == ':') | |
872 | || (*name_cursor == '\'' && name_cursor[1])) | |
463ee0b2 | 873 | { |
463ee0b2 | 874 | if (!stash) |
3280af22 | 875 | stash = PL_defstash; |
dc437b57 | 876 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c | 877 | return NULL; |
463ee0b2 | 878 | |
b3d904f3 | 879 | len = name_cursor - name; |
85e6fe83 | 880 | if (len > 0) { |
0cea0058 | 881 | char smallbuf[128]; |
62b57502 | 882 | char *tmpbuf; |
62b57502 | 883 | |
798b63bc | 884 | if (len + 2 <= (I32)sizeof (smallbuf)) |
3c78fafa | 885 | tmpbuf = smallbuf; |
62b57502 | 886 | else |
2ae0db35 | 887 | Newx(tmpbuf, len+2, char); |
a0d0e21e LW |
888 | Copy(name, tmpbuf, len, char); |
889 | tmpbuf[len++] = ':'; | |
890 | tmpbuf[len++] = ':'; | |
463ee0b2 | 891 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
a0714e2c | 892 | gv = gvp ? *gvp : NULL; |
3280af22 | 893 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 | 894 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 | 895 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 GS |
896 | else |
897 | GvMULTI_on(gv); | |
898 | } | |
3c78fafa | 899 | if (tmpbuf != smallbuf) |
62b57502 | 900 | Safefree(tmpbuf); |
3280af22 | 901 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0714e2c | 902 | return NULL; |
85e6fe83 | 903 | |
463ee0b2 LW |
904 | if (!(stash = GvHV(gv))) |
905 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 906 | |
bfcb3514 | 907 | if (!HvNAME_get(stash)) |
b3d904f3 | 908 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); |
463ee0b2 LW |
909 | } |
910 | ||
b3d904f3 NC |
911 | if (*name_cursor == ':') |
912 | name_cursor++; | |
913 | name_cursor++; | |
914 | name = name_cursor; | |
ad6bfa9d | 915 | if (name == name_end) |
017a3ce5 | 916 | return gv ? gv : (GV*)*hv_fetchs(PL_defstash, "main::", TRUE); |
79072805 | 917 | } |
79072805 | 918 | } |
b3d904f3 | 919 | len = name_cursor - name; |
463ee0b2 LW |
920 | |
921 | /* No stash in name, so see how we can default */ | |
922 | ||
923 | if (!stash) { | |
fafc274c | 924 | no_stash: |
8ccce9ae | 925 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c | 926 | bool global = FALSE; |
927 | ||
8ccce9ae NC |
928 | switch (len) { |
929 | case 1: | |
18ea00d7 | 930 | if (*name == '_') |
9d116dd7 | 931 | global = TRUE; |
18ea00d7 | 932 | break; |
8ccce9ae NC |
933 | case 3: |
934 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
935 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
936 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
9d116dd7 | 937 | global = TRUE; |
18ea00d7 | 938 | break; |
8ccce9ae NC |
939 | case 4: |
940 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
941 | && name[3] == 'V') | |
9d116dd7 | 942 | global = TRUE; |
18ea00d7 | 943 | break; |
8ccce9ae NC |
944 | case 5: |
945 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
946 | && name[3] == 'I' && name[4] == 'N') | |
463ee0b2 | 947 | global = TRUE; |
18ea00d7 | 948 | break; |
8ccce9ae NC |
949 | case 6: |
950 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
951 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
952 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
953 | global = TRUE; | |
954 | break; | |
955 | case 7: | |
956 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
957 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
958 | && name[6] == 'T') | |
18ea00d7 NC |
959 | global = TRUE; |
960 | break; | |
463ee0b2 | 961 | } |
9607fc9c | 962 | |
463ee0b2 | 963 | if (global) |
3280af22 | 964 | stash = PL_defstash; |
923e4eb5 | 965 | else if (IN_PERL_COMPILETIME) { |
3280af22 NIS |
966 | stash = PL_curstash; |
967 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
748a9306 LW |
968 | sv_type != SVt_PVCV && |
969 | sv_type != SVt_PVGV && | |
4633a7c4 | 970 | sv_type != SVt_PVFM && |
c07a80fd | 971 | sv_type != SVt_PVIO && |
70ec6265 NC |
972 | !(len == 1 && sv_type == SVt_PV && |
973 | (*name == 'a' || *name == 'b')) ) | |
748a9306 | 974 | { |
4633a7c4 LW |
975 | gvp = (GV**)hv_fetch(stash,name,len,0); |
976 | if (!gvp || | |
3280af22 | 977 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 AD |
978 | SvTYPE(*gvp) != SVt_PVGV) |
979 | { | |
d4c19fe8 | 980 | stash = NULL; |
a5f75d66 | 981 | } |
155aba94 GS |
982 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
983 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
984 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
4633a7c4 | 985 | { |
cea2e8a9 | 986 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 LW |
987 | sv_type == SVt_PVAV ? '@' : |
988 | sv_type == SVt_PVHV ? '%' : '$', | |
989 | name); | |
8ebc5c01 | 990 | if (GvCVu(*gvp)) |
cc507455 | 991 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
d4c19fe8 | 992 | stash = NULL; |
4633a7c4 | 993 | } |
a0d0e21e | 994 | } |
85e6fe83 | 995 | } |
463ee0b2 | 996 | else |
1d7c1841 | 997 | stash = CopSTASH(PL_curcop); |
463ee0b2 LW |
998 | } |
999 | else | |
3280af22 | 1000 | stash = PL_defstash; |
463ee0b2 LW |
1001 | } |
1002 | ||
1003 | /* By this point we should have a stash and a name */ | |
1004 | ||
a0d0e21e | 1005 | if (!stash) { |
5a844595 | 1006 | if (add) { |
9d4ba2ae | 1007 | SV * const err = Perl_mess(aTHX_ |
5a844595 GS |
1008 | "Global symbol \"%s%s\" requires explicit package name", |
1009 | (sv_type == SVt_PV ? "$" | |
1010 | : sv_type == SVt_PVAV ? "@" | |
1011 | : sv_type == SVt_PVHV ? "%" | |
608b3986 | 1012 | : ""), name); |
e7f343b6 | 1013 | GV *gv; |
608b3986 AE |
1014 | if (USE_UTF8_IN_NAMES) |
1015 | SvUTF8_on(err); | |
1016 | qerror(err); | |
e7f343b6 NC |
1017 | gv = gv_fetchpvn_flags("<none>::", 8, GV_ADDMULTI, SVt_PVHV); |
1018 | if(!gv) { | |
1019 | /* symbol table under destruction */ | |
1020 | return NULL; | |
1021 | } | |
1022 | stash = GvHV(gv); | |
a0d0e21e | 1023 | } |
d7aacf4e | 1024 | else |
a0714e2c | 1025 | return NULL; |
a0d0e21e LW |
1026 | } |
1027 | ||
1028 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
a0714e2c | 1029 | return NULL; |
a0d0e21e | 1030 | |
79072805 | 1031 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 | 1032 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
a0714e2c | 1033 | return NULL; |
79072805 LW |
1034 | gv = *gvp; |
1035 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e | 1036 | if (add) { |
a5f75d66 | 1037 | GvMULTI_on(gv); |
a0d0e21e | 1038 | gv_init_sv(gv, sv_type); |
45cbc99a | 1039 | if (len == 1 && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) { |
44a2ac75 YO |
1040 | if (*name == '!') |
1041 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); | |
45cbc99a | 1042 | else if (*name == '-' || *name == '+') |
192b9cd1 | 1043 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
45cbc99a | 1044 | } |
a0d0e21e | 1045 | } |
79072805 | 1046 | return gv; |
add2581e | 1047 | } else if (no_init) { |
55d729e4 | 1048 | return gv; |
e26df76a NC |
1049 | } else if (no_expand && SvROK(gv)) { |
1050 | return gv; | |
79072805 | 1051 | } |
93a17b20 LW |
1052 | |
1053 | /* Adding a new symbol */ | |
1054 | ||
0453d815 | 1055 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d | 1056 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 | 1057 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e | 1058 | gv_init_sv(gv, sv_type); |
93a17b20 | 1059 | |
a0288114 | 1060 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d | 1061 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 PM |
1062 | GvMULTI_on(gv) ; |
1063 | ||
93a17b20 | 1064 | /* set up magic where warranted */ |
cc4c2da6 | 1065 | if (len > 1) { |
9431620d | 1066 | #ifndef EBCDIC |
cc4c2da6 | 1067 | if (*name > 'V' ) { |
6f207bd3 | 1068 | NOOP; |
cc4c2da6 | 1069 | /* Nothing else to do. |
91f565cb | 1070 | The compiler will probably turn the switch statement into a |
cc4c2da6 NC |
1071 | branch table. Make sure we avoid even that small overhead for |
1072 | the common case of lower case variable names. */ | |
9431620d NC |
1073 | } else |
1074 | #endif | |
1075 | { | |
b464bac0 | 1076 | const char * const name2 = name + 1; |
cc4c2da6 NC |
1077 | switch (*name) { |
1078 | case 'A': | |
1079 | if (strEQ(name2, "RGV")) { | |
1080 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
1081 | } | |
7b8203e3 YST |
1082 | else if (strEQ(name2, "RGVOUT")) { |
1083 | GvMULTI_on(gv); | |
1084 | } | |
cc4c2da6 NC |
1085 | break; |
1086 | case 'E': | |
1087 | if (strnEQ(name2, "XPORT", 5)) | |
1088 | GvMULTI_on(gv); | |
1089 | break; | |
1090 | case 'I': | |
1091 | if (strEQ(name2, "SA")) { | |
9d4ba2ae | 1092 | AV* const av = GvAVn(gv); |
cc4c2da6 | 1093 | GvMULTI_on(gv); |
bd61b366 | 1094 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, NULL, 0); |
cc4c2da6 NC |
1095 | /* NOTE: No support for tied ISA */ |
1096 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") | |
1097 | && AvFILLp(av) == -1) | |
1098 | { | |
e1ec3a88 | 1099 | const char *pname; |
cc4c2da6 | 1100 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
da51bb9b | 1101 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 | 1102 | av_push(av, newSVpvn(pname = "DB_File",7)); |
da51bb9b | 1103 | gv_stashpvn(pname, 7, GV_ADD); |
cc4c2da6 | 1104 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
da51bb9b | 1105 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 | 1106 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
da51bb9b | 1107 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 | 1108 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
da51bb9b | 1109 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 NC |
1110 | } |
1111 | } | |
1112 | break; | |
1113 | case 'O': | |
1114 | if (strEQ(name2, "VERLOAD")) { | |
9d4ba2ae | 1115 | HV* const hv = GvHVn(gv); |
cc4c2da6 | 1116 | GvMULTI_on(gv); |
a0714e2c | 1117 | hv_magic(hv, NULL, PERL_MAGIC_overload); |
cc4c2da6 NC |
1118 | } |
1119 | break; | |
1120 | case 'S': | |
1121 | if (strEQ(name2, "IG")) { | |
1122 | HV *hv; | |
1123 | I32 i; | |
1124 | if (!PL_psig_ptr) { | |
a02a5408 JC |
1125 | Newxz(PL_psig_ptr, SIG_SIZE, SV*); |
1126 | Newxz(PL_psig_name, SIG_SIZE, SV*); | |
1127 | Newxz(PL_psig_pend, SIG_SIZE, int); | |
cc4c2da6 NC |
1128 | } |
1129 | GvMULTI_on(gv); | |
1130 | hv = GvHVn(gv); | |
a0714e2c | 1131 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 1132 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 1133 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
1134 | if (init) |
1135 | sv_setsv(*init, &PL_sv_undef); | |
1136 | PL_psig_ptr[i] = 0; | |
1137 | PL_psig_name[i] = 0; | |
1138 | PL_psig_pend[i] = 0; | |
1139 | } | |
1140 | } | |
1141 | break; | |
1142 | case 'V': | |
1143 | if (strEQ(name2, "ERSION")) | |
1144 | GvMULTI_on(gv); | |
1145 | break; | |
e5218da5 GA |
1146 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1147 | if (strEQ(name2, "HILD_ERROR_NATIVE")) | |
1148 | goto magicalize; | |
1149 | break; | |
cc4c2da6 NC |
1150 | case '\005': /* $^ENCODING */ |
1151 | if (strEQ(name2, "NCODING")) | |
1152 | goto magicalize; | |
1153 | break; | |
cde0cee5 YO |
1154 | case '\015': /* $^MATCH */ |
1155 | if (strEQ(name2, "ATCH")) | |
2fdbfb4d | 1156 | goto magicalize; |
cc4c2da6 NC |
1157 | case '\017': /* $^OPEN */ |
1158 | if (strEQ(name2, "PEN")) | |
1159 | goto magicalize; | |
1160 | break; | |
cde0cee5 YO |
1161 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
1162 | if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH")) | |
2fdbfb4d | 1163 | goto magicalize; |
cc4c2da6 NC |
1164 | case '\024': /* ${^TAINT} */ |
1165 | if (strEQ(name2, "AINT")) | |
1166 | goto ro_magicalize; | |
1167 | break; | |
7cebcbc0 | 1168 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 | 1169 | if (strEQ(name2, "NICODE")) |
cc4c2da6 | 1170 | goto ro_magicalize; |
a0288114 | 1171 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 | 1172 | goto ro_magicalize; |
e07ea26a NC |
1173 | if (strEQ(name2, "TF8CACHE")) |
1174 | goto magicalize; | |
cc4c2da6 NC |
1175 | break; |
1176 | case '\027': /* $^WARNING_BITS */ | |
1177 | if (strEQ(name2, "ARNING_BITS")) | |
1178 | goto magicalize; | |
1179 | break; | |
1180 | case '1': | |
1181 | case '2': | |
1182 | case '3': | |
1183 | case '4': | |
1184 | case '5': | |
1185 | case '6': | |
1186 | case '7': | |
1187 | case '8': | |
1188 | case '9': | |
85e6fe83 | 1189 | { |
2fdbfb4d AB |
1190 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
1191 | this test */ | |
1192 | /* This snippet is taken from is_gv_magical */ | |
cc4c2da6 NC |
1193 | const char *end = name + len; |
1194 | while (--end > name) { | |
2fdbfb4d | 1195 | if (!isDIGIT(*end)) return gv; |
cc4c2da6 | 1196 | } |
2fdbfb4d | 1197 | goto magicalize; |
1d7c1841 | 1198 | } |
dc437b57 | 1199 | } |
93a17b20 | 1200 | } |
392db708 NC |
1201 | } else { |
1202 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
1203 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 NC |
1204 | switch (*name) { |
1205 | case '&': | |
1206 | case '`': | |
1207 | case '\'': | |
1208 | if ( | |
1209 | sv_type == SVt_PVAV || | |
1210 | sv_type == SVt_PVHV || | |
1211 | sv_type == SVt_PVCV || | |
1212 | sv_type == SVt_PVFM || | |
1213 | sv_type == SVt_PVIO | |
1214 | ) { break; } | |
1215 | PL_sawampersand = TRUE; | |
2fdbfb4d | 1216 | goto magicalize; |
cc4c2da6 NC |
1217 | |
1218 | case ':': | |
c69033f2 | 1219 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
1220 | goto magicalize; |
1221 | ||
1222 | case '?': | |
ff0cee69 | 1223 | #ifdef COMPLEX_STATUS |
c69033f2 | 1224 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 1225 | #endif |
cc4c2da6 | 1226 | goto magicalize; |
ff0cee69 | 1227 | |
cc4c2da6 | 1228 | case '!': |
67261566 | 1229 | GvMULTI_on(gv); |
44a2ac75 | 1230 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 1231 | |
c69033f2 | 1232 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 | 1233 | |
44a2ac75 | 1234 | /* magicalization must be done before require_tie_mod is called */ |
67261566 | 1235 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
44a2ac75 | 1236 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
d2c93421 | 1237 | |
6cef1e77 | 1238 | break; |
cc4c2da6 | 1239 | case '-': |
44a2ac75 YO |
1240 | case '+': |
1241 | GvMULTI_on(gv); /* no used once warnings here */ | |
1242 | { | |
44a2ac75 | 1243 | AV* const av = GvAVn(gv); |
67261566 | 1244 | SV* const avc = (*name == '+') ? (SV*)av : NULL; |
44a2ac75 | 1245 | |
67261566 | 1246 | sv_magic((SV*)av, avc, PERL_MAGIC_regdata, NULL, 0); |
44a2ac75 | 1247 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
67261566 | 1248 | if (avc) |
44a2ac75 | 1249 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 | 1250 | SvREADONLY_on(av); |
67261566 YO |
1251 | |
1252 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
192b9cd1 | 1253 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
67261566 | 1254 | |
80305961 | 1255 | break; |
cc4c2da6 NC |
1256 | } |
1257 | case '*': | |
cc4c2da6 | 1258 | case '#': |
fafcdf9e | 1259 | if (sv_type == SVt_PV && ckWARN2_d(WARN_DEPRECATED, WARN_SYNTAX)) |
cc4c2da6 | 1260 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
8ae1fe26 RGS |
1261 | "$%c is no longer supported", *name); |
1262 | break; | |
cc4c2da6 | 1263 | case '|': |
c69033f2 | 1264 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 NC |
1265 | goto magicalize; |
1266 | ||
b3ca2e83 NC |
1267 | case '\010': /* $^H */ |
1268 | { | |
1269 | HV *const hv = GvHVn(gv); | |
1270 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
1271 | } | |
1272 | goto magicalize; | |
cc4c2da6 | 1273 | case '\023': /* $^S */ |
2fdbfb4d AB |
1274 | ro_magicalize: |
1275 | SvREADONLY_on(GvSVn(gv)); | |
1276 | /* FALL THROUGH */ | |
cc4c2da6 NC |
1277 | case '1': |
1278 | case '2': | |
1279 | case '3': | |
1280 | case '4': | |
1281 | case '5': | |
1282 | case '6': | |
1283 | case '7': | |
1284 | case '8': | |
1285 | case '9': | |
cc4c2da6 NC |
1286 | case '[': |
1287 | case '^': | |
1288 | case '~': | |
1289 | case '=': | |
1290 | case '%': | |
1291 | case '.': | |
1292 | case '(': | |
1293 | case ')': | |
1294 | case '<': | |
1295 | case '>': | |
1296 | case ',': | |
1297 | case '\\': | |
1298 | case '/': | |
1299 | case '\001': /* $^A */ | |
1300 | case '\003': /* $^C */ | |
1301 | case '\004': /* $^D */ | |
1302 | case '\005': /* $^E */ | |
1303 | case '\006': /* $^F */ | |
cc4c2da6 NC |
1304 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1305 | case '\016': /* $^N */ | |
1306 | case '\017': /* $^O */ | |
1307 | case '\020': /* $^P */ | |
1308 | case '\024': /* $^T */ | |
1309 | case '\027': /* $^W */ | |
1310 | magicalize: | |
c69033f2 | 1311 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
cc4c2da6 | 1312 | break; |
e521374c | 1313 | |
cc4c2da6 | 1314 | case '\014': /* $^L */ |
c69033f2 NC |
1315 | sv_setpvn(GvSVn(gv),"\f",1); |
1316 | PL_formfeed = GvSVn(gv); | |
463ee0b2 | 1317 | break; |
cc4c2da6 | 1318 | case ';': |
c69033f2 | 1319 | sv_setpvn(GvSVn(gv),"\034",1); |
463ee0b2 | 1320 | break; |
cc4c2da6 NC |
1321 | case ']': |
1322 | { | |
c69033f2 | 1323 | SV * const sv = GvSVn(gv); |
d7aa5382 | 1324 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 1325 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
1326 | GvSV(gv) = vnumify(PL_patchlevel); |
1327 | SvREADONLY_on(GvSV(gv)); | |
1328 | SvREFCNT_dec(sv); | |
93a17b20 LW |
1329 | } |
1330 | break; | |
cc4c2da6 NC |
1331 | case '\026': /* $^V */ |
1332 | { | |
c69033f2 | 1333 | SV * const sv = GvSVn(gv); |
f9be5ac8 DM |
1334 | GvSV(gv) = new_version(PL_patchlevel); |
1335 | SvREADONLY_on(GvSV(gv)); | |
1336 | SvREFCNT_dec(sv); | |
16070b82 GS |
1337 | } |
1338 | break; | |
cc4c2da6 | 1339 | } |
79072805 | 1340 | } |
93a17b20 | 1341 | return gv; |
79072805 LW |
1342 | } |
1343 | ||
1344 | void | |
35a4481c | 1345 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1346 | { |
35a4481c | 1347 | const char *name; |
7423f6db | 1348 | STRLEN namelen; |
35a4481c | 1349 | const HV * const hv = GvSTASH(gv); |
43693395 | 1350 | if (!hv) { |
0c34ef67 | 1351 | SvOK_off(sv); |
43693395 GS |
1352 | return; |
1353 | } | |
666ea192 | 1354 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 1355 | |
bfcb3514 | 1356 | name = HvNAME_get(hv); |
7423f6db NC |
1357 | if (name) { |
1358 | namelen = HvNAMELEN_get(hv); | |
1359 | } else { | |
e27ad1f2 | 1360 | name = "__ANON__"; |
7423f6db NC |
1361 | namelen = 8; |
1362 | } | |
a0288114 | 1363 | |
e27ad1f2 | 1364 | if (keepmain || strNE(name, "main")) { |
7423f6db | 1365 | sv_catpvn(sv,name,namelen); |
396482e1 | 1366 | sv_catpvs(sv,"::"); |
43693395 | 1367 | } |
257984c0 | 1368 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 GS |
1369 | } |
1370 | ||
1371 | void | |
35a4481c | 1372 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1373 | { |
46c461b5 AL |
1374 | const GV * const egv = GvEGV(gv); |
1375 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); | |
43693395 GS |
1376 | } |
1377 | ||
79072805 | 1378 | IO * |
864dbfa3 | 1379 | Perl_newIO(pTHX) |
79072805 | 1380 | { |
97aff369 | 1381 | dVAR; |
8990e307 | 1382 | GV *iogv; |
b9f83d2f | 1383 | IO * const io = (IO*)newSV_type(SVt_PVIO); |
158623e7 NC |
1384 | /* This used to read SvREFCNT(io) = 1; |
1385 | It's not clear why the reference count needed an explicit reset. NWC | |
1386 | */ | |
1387 | assert (SvREFCNT(io) == 1); | |
8990e307 | 1388 | SvOBJECT_on(io); |
b464bac0 | 1389 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 | 1390 | hv_clear(PL_stashcache); |
71315bf2 | 1391 | iogv = gv_fetchpvs("FileHandle::", 0, SVt_PVHV); |
5f2d631d GS |
1392 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1393 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) | |
71315bf2 | 1394 | iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV); |
b162af07 | 1395 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 LW |
1396 | return io; |
1397 | } | |
1398 | ||
1399 | void | |
1146e912 | 1400 | Perl_gv_check(pTHX_ const HV *stash) |
79072805 | 1401 | { |
97aff369 | 1402 | dVAR; |
79072805 | 1403 | register I32 i; |
463ee0b2 | 1404 | |
8990e307 LW |
1405 | if (!HvARRAY(stash)) |
1406 | return; | |
a0d0e21e | 1407 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 1408 | const HE *entry; |
dc437b57 | 1409 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 AL |
1410 | register GV *gv; |
1411 | HV *hv; | |
dc437b57 | 1412 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f | 1413 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 1414 | { |
19b6c847 | 1415 | if (hv != PL_defstash && hv != stash) |
a0d0e21e LW |
1416 | gv_check(hv); /* nested package */ |
1417 | } | |
dc437b57 | 1418 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 | 1419 | const char *file; |
dc437b57 | 1420 | gv = (GV*)HeVAL(entry); |
55d729e4 | 1421 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 1422 | continue; |
1d7c1841 | 1423 | file = GvFILE(gv); |
1d7c1841 GS |
1424 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1425 | #ifdef USE_ITHREADS | |
dd374669 | 1426 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 GS |
1427 | #else |
1428 | CopFILEGV(PL_curcop) = gv_fetchfile(file); | |
1429 | #endif | |
9014280d | 1430 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 | 1431 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 | 1432 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 | 1433 | } |
79072805 LW |
1434 | } |
1435 | } | |
1436 | } | |
1437 | ||
1438 | GV * | |
e1ec3a88 | 1439 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 | 1440 | { |
97aff369 | 1441 | dVAR; |
cea2e8a9 | 1442 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 | 1443 | GV_ADD, SVt_PVGV); |
79072805 LW |
1444 | } |
1445 | ||
1446 | /* hopefully this is only called on local symbol table entries */ | |
1447 | ||
1448 | GP* | |
864dbfa3 | 1449 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 1450 | { |
97aff369 | 1451 | dVAR; |
1d7c1841 | 1452 | if (!gp) |
d4c19fe8 | 1453 | return NULL; |
79072805 | 1454 | gp->gp_refcnt++; |
44a8e56a | 1455 | if (gp->gp_cv) { |
1456 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
1457 | /* If the GP they asked for a reference to contains |
1458 | a method cache entry, clear it first, so that we | |
1459 | don't infect them with our cached entry */ | |
44a8e56a | 1460 | SvREFCNT_dec(gp->gp_cv); |
601f1833 | 1461 | gp->gp_cv = NULL; |
44a8e56a | 1462 | gp->gp_cvgen = 0; |
1463 | } | |
44a8e56a | 1464 | } |
79072805 | 1465 | return gp; |
79072805 LW |
1466 | } |
1467 | ||
1468 | void | |
864dbfa3 | 1469 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 1470 | { |
97aff369 | 1471 | dVAR; |
79072805 LW |
1472 | GP* gp; |
1473 | ||
f7877b28 | 1474 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 1475 | return; |
f248d071 GS |
1476 | if (gp->gp_refcnt == 0) { |
1477 | if (ckWARN_d(WARN_INTERNAL)) | |
9014280d | 1478 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc SB |
1479 | "Attempt to free unreferenced glob pointers" |
1480 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
1481 | return; |
1482 | } | |
748a9306 LW |
1483 | if (--gp->gp_refcnt > 0) { |
1484 | if (gp->gp_egv == gv) | |
1485 | gp->gp_egv = 0; | |
dd38834b | 1486 | GvGP(gv) = 0; |
79072805 | 1487 | return; |
748a9306 | 1488 | } |
79072805 | 1489 | |
c9ce39a9 RGS |
1490 | if (gp->gp_file_hek) |
1491 | unshare_hek(gp->gp_file_hek); | |
c9da69fb AL |
1492 | SvREFCNT_dec(gp->gp_sv); |
1493 | SvREFCNT_dec(gp->gp_av); | |
bfcb3514 NC |
1494 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1495 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
1496 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { | |
bfcb3514 NC |
1497 | const char *hvname = HvNAME_get(gp->gp_hv); |
1498 | if (PL_stashcache && hvname) | |
04fe65b0 | 1499 | (void)hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
7423f6db | 1500 | G_DISCARD); |
bfcb3514 | 1501 | SvREFCNT_dec(gp->gp_hv); |
13207a71 | 1502 | } |
c9da69fb AL |
1503 | SvREFCNT_dec(gp->gp_io); |
1504 | SvREFCNT_dec(gp->gp_cv); | |
1505 | SvREFCNT_dec(gp->gp_form); | |
748a9306 | 1506 | |
79072805 LW |
1507 | Safefree(gp); |
1508 | GvGP(gv) = 0; | |
1509 | } | |
1510 | ||
d460ef45 NIS |
1511 | int |
1512 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
1513 | { | |
53c1dcc0 AL |
1514 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1515 | PERL_UNUSED_ARG(sv); | |
dd374669 | 1516 | |
d460ef45 NIS |
1517 | if (amtp && AMT_AMAGIC(amtp)) { |
1518 | int i; | |
1519 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 1520 | CV * const cv = amtp->table[i]; |
b37c2d43 | 1521 | if (cv) { |
d460ef45 | 1522 | SvREFCNT_dec((SV *) cv); |
601f1833 | 1523 | amtp->table[i] = NULL; |
d460ef45 NIS |
1524 | } |
1525 | } | |
1526 | } | |
1527 | return 0; | |
1528 | } | |
1529 | ||
a0d0e21e LW |
1530 | /* Updates and caches the CV's */ |
1531 | ||
1532 | bool | |
864dbfa3 | 1533 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e | 1534 | { |
97aff369 | 1535 | dVAR; |
53c1dcc0 | 1536 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
a6006777 | 1537 | AMT amt; |
9b439311 | 1538 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 1539 | U32 newgen; |
a0d0e21e | 1540 | |
9b439311 | 1541 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
1542 | if (mg) { |
1543 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
1544 | if (amtp->was_ok_am == PL_amagic_generation | |
e1a479c5 | 1545 | && amtp->was_ok_sub == newgen) { |
14899595 NC |
1546 | return (bool)AMT_OVERLOADED(amtp); |
1547 | } | |
1548 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); | |
1549 | } | |
a0d0e21e | 1550 | |
bfcb3514 | 1551 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 1552 | |
d460ef45 | 1553 | Zero(&amt,1,AMT); |
3280af22 | 1554 | amt.was_ok_am = PL_amagic_generation; |
e1a479c5 | 1555 | amt.was_ok_sub = newgen; |
a6006777 | 1556 | amt.fallback = AMGfallNO; |
1557 | amt.flags = 0; | |
1558 | ||
a6006777 | 1559 | { |
32251b26 IZ |
1560 | int filled = 0, have_ovl = 0; |
1561 | int i, lim = 1; | |
a6006777 | 1562 | |
22c35a8c | 1563 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 1564 | |
89ffc314 | 1565 | /* Try to find via inheritance. */ |
53c1dcc0 AL |
1566 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1567 | SV * const sv = gv ? GvSV(gv) : NULL; | |
1568 | CV* cv; | |
89ffc314 IZ |
1569 | |
1570 | if (!gv) | |
32251b26 | 1571 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 NC |
1572 | #ifdef PERL_DONT_CREATE_GVSV |
1573 | else if (!sv) { | |
6f207bd3 | 1574 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 NC |
1575 | } |
1576 | #endif | |
89ffc314 IZ |
1577 | else if (SvTRUE(sv)) |
1578 | amt.fallback=AMGfallYES; | |
1579 | else if (SvOK(sv)) | |
1580 | amt.fallback=AMGfallNEVER; | |
a6006777 | 1581 | |
32251b26 | 1582 | for (i = 1; i < lim; i++) |
601f1833 | 1583 | amt.table[i] = NULL; |
32251b26 | 1584 | for (; i < NofAMmeth; i++) { |
6136c704 | 1585 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 1586 | /* Human-readable form, for debugging: */ |
6136c704 | 1587 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
e1ec3a88 | 1588 | const STRLEN l = strlen(cooky); |
89ffc314 | 1589 | |
a0288114 | 1590 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 1591 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
1592 | /* don't fill the cache while looking up! |
1593 | Creation of inheritance stubs in intermediate packages may | |
1594 | conflict with the logic of runtime method substitution. | |
1595 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
1596 | then we could have created stubs for "(+0" in A and C too. | |
1597 | But if B overloads "bool", we may want to use it for | |
1598 | numifying instead of C's "+0". */ | |
1599 | if (i >= DESTROY_amg) | |
1600 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); | |
1601 | else /* Autoload taken care of below */ | |
1602 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); | |
46fc3d4c | 1603 | cv = 0; |
89ffc314 | 1604 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 | 1605 | const char *hvname; |
44a8e56a | 1606 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 | 1607 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 IZ |
1608 | /* This is a hack to support autoloading..., while |
1609 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 1610 | /* GvSV contains the name of the method. */ |
6136c704 | 1611 | GV *ngv = NULL; |
c69033f2 | 1612 | SV *gvsv = GvSV(gv); |
a0288114 AL |
1613 | |
1614 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
1615 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
ca0270c4 | 1616 | (void*)GvSV(gv), cp, hvname) ); |
c69033f2 NC |
1617 | if (!gvsv || !SvPOK(gvsv) |
1618 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), | |
dc848c6f | 1619 | FALSE))) |
1620 | { | |
a0288114 | 1621 | /* Can be an import stub (created by "can"). */ |
666ea192 | 1622 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
a0288114 AL |
1623 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1624 | "in package \"%.256s\"", | |
35c1215d NC |
1625 | (GvCVGEN(gv) ? "Stub found while resolving" |
1626 | : "Can't resolve"), | |
bfcb3514 | 1627 | name, cp, hvname); |
44a8e56a | 1628 | } |
dc848c6f | 1629 | cv = GvCV(gv = ngv); |
44a8e56a | 1630 | } |
b464bac0 | 1631 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 1632 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 1633 | GvNAME(CvGV(cv))) ); |
1634 | filled = 1; | |
32251b26 IZ |
1635 | if (i < DESTROY_amg) |
1636 | have_ovl = 1; | |
611c1e95 IZ |
1637 | } else if (gv) { /* Autoloaded... */ |
1638 | cv = (CV*)gv; | |
1639 | filled = 1; | |
44a8e56a | 1640 | } |
b37c2d43 | 1641 | amt.table[i]=(CV*)SvREFCNT_inc_simple(cv); |
a0d0e21e | 1642 | } |
a0d0e21e | 1643 | if (filled) { |
a6006777 | 1644 | AMT_AMAGIC_on(&amt); |
32251b26 IZ |
1645 | if (have_ovl) |
1646 | AMT_OVERLOADED_on(&amt); | |
14befaf4 DM |
1647 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1648 | (char*)&amt, sizeof(AMT)); | |
32251b26 | 1649 | return have_ovl; |
a0d0e21e LW |
1650 | } |
1651 | } | |
a6006777 | 1652 | /* Here we have no table: */ |
9cbac4c7 | 1653 | /* no_table: */ |
a6006777 | 1654 | AMT_AMAGIC_off(&amt); |
14befaf4 DM |
1655 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1656 | (char*)&amt, sizeof(AMTS)); | |
a0d0e21e LW |
1657 | return FALSE; |
1658 | } | |
1659 | ||
32251b26 IZ |
1660 | |
1661 | CV* | |
1662 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
1663 | { | |
97aff369 | 1664 | dVAR; |
3f8f4626 | 1665 | MAGIC *mg; |
32251b26 | 1666 | AMT *amtp; |
e1a479c5 | 1667 | U32 newgen; |
9b439311 | 1668 | struct mro_meta* stash_meta; |
32251b26 | 1669 | |
bfcb3514 | 1670 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 1671 | return NULL; |
e1a479c5 | 1672 | |
9b439311 BB |
1673 | stash_meta = HvMROMETA(stash); |
1674 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 1675 | |
14befaf4 | 1676 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
1677 | if (!mg) { |
1678 | do_update: | |
1679 | Gv_AMupdate(stash); | |
14befaf4 | 1680 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 | 1681 | } |
a9fd4e40 | 1682 | assert(mg); |
32251b26 IZ |
1683 | amtp = (AMT*)mg->mg_ptr; |
1684 | if ( amtp->was_ok_am != PL_amagic_generation | |
e1a479c5 | 1685 | || amtp->was_ok_sub != newgen ) |
32251b26 | 1686 | goto do_update; |
3ad83ce7 | 1687 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 1688 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
1689 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1690 | /* Passing it through may have resulted in a warning | |
1691 | "Inherited AUTOLOAD for a non-method deprecated", since | |
1692 | our caller is going through a function call, not a method call. | |
1693 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 1694 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
1695 | |
1696 | if (gv && GvCV(gv)) | |
1697 | return GvCV(gv); | |
1698 | } | |
1699 | return ret; | |
1700 | } | |
a0288114 | 1701 | |
601f1833 | 1702 | return NULL; |
32251b26 IZ |
1703 | } |
1704 | ||
1705 | ||
a0d0e21e | 1706 | SV* |
864dbfa3 | 1707 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 1708 | { |
27da23d5 | 1709 | dVAR; |
b267980d | 1710 | MAGIC *mg; |
9c5ffd7c | 1711 | CV *cv=NULL; |
a0d0e21e | 1712 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 1713 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
1714 | int off = 0, off1, lr = 0, notfound = 0; |
1715 | int postpr = 0, force_cpy = 0; | |
1716 | int assign = AMGf_assign & flags; | |
1717 | const int assignshift = assign ? 1 : 0; | |
497b47a8 JH |
1718 | #ifdef DEBUGGING |
1719 | int fl=0; | |
497b47a8 | 1720 | #endif |
25716404 | 1721 | HV* stash=NULL; |
a0d0e21e | 1722 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 GS |
1723 | && (stash = SvSTASH(SvRV(left))) |
1724 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1725 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1726 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 1727 | : NULL)) |
b267980d | 1728 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
1729 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1730 | * usual method */ | |
497b47a8 JH |
1731 | ( |
1732 | #ifdef DEBUGGING | |
1733 | fl = 1, | |
a0288114 | 1734 | #endif |
497b47a8 | 1735 | cv = cvp[off=method])))) { |
a0d0e21e LW |
1736 | lr = -1; /* Call method for left argument */ |
1737 | } else { | |
1738 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
1739 | int logic; | |
1740 | ||
1741 | /* look for substituted methods */ | |
ee239bfe | 1742 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
1743 | switch (method) { |
1744 | case inc_amg: | |
ee239bfe IZ |
1745 | force_cpy = 1; |
1746 | if ((cv = cvp[off=add_ass_amg]) | |
1747 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 1748 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1749 | } |
1750 | break; | |
1751 | case dec_amg: | |
ee239bfe IZ |
1752 | force_cpy = 1; |
1753 | if ((cv = cvp[off = subtr_ass_amg]) | |
1754 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 1755 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1756 | } |
1757 | break; | |
1758 | case bool__amg: | |
1759 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
1760 | break; | |
1761 | case numer_amg: | |
1762 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
1763 | break; | |
1764 | case string_amg: | |
1765 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
1766 | break; | |
b7787f18 AL |
1767 | case not_amg: |
1768 | (void)((cv = cvp[off=bool__amg]) | |
1769 | || (cv = cvp[off=numer_amg]) | |
1770 | || (cv = cvp[off=string_amg])); | |
1771 | postpr = 1; | |
1772 | break; | |
748a9306 LW |
1773 | case copy_amg: |
1774 | { | |
76e3520e GS |
1775 | /* |
1776 | * SV* ref causes confusion with the interpreter variable of | |
1777 | * the same name | |
1778 | */ | |
890ce7af | 1779 | SV* const tmpRef=SvRV(left); |
76e3520e | 1780 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 1781 | /* |
1782 | * Just to be extra cautious. Maybe in some | |
1783 | * additional cases sv_setsv is safe, too. | |
1784 | */ | |
890ce7af | 1785 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 1786 | SvOBJECT_on(newref); |
96d4b0ee NC |
1787 | /* As a bit of a source compatibility hack, SvAMAGIC() and |
1788 | friends dereference an RV, to behave the same was as when | |
1789 | overloading was stored on the reference, not the referant. | |
1790 | Hence we can't use SvAMAGIC_on() | |
1791 | */ | |
1792 | SvFLAGS(newref) |= SVf_AMAGIC; | |
b162af07 | 1793 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 LW |
1794 | return newref; |
1795 | } | |
1796 | } | |
1797 | break; | |
a0d0e21e | 1798 | case abs_amg: |
b267980d | 1799 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 1800 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 1801 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 1802 | if (off1==lt_amg) { |
890ce7af | 1803 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1804 | lt_amg,AMGf_noright); |
1805 | logic = SvTRUE(lessp); | |
1806 | } else { | |
890ce7af | 1807 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1808 | ncmp_amg,AMGf_noright); |
1809 | logic = (SvNV(lessp) < 0); | |
1810 | } | |
1811 | if (logic) { | |
1812 | if (off==subtr_amg) { | |
1813 | right = left; | |
748a9306 | 1814 | left = nullsv; |
a0d0e21e LW |
1815 | lr = 1; |
1816 | } | |
1817 | } else { | |
1818 | return left; | |
1819 | } | |
1820 | } | |
1821 | break; | |
1822 | case neg_amg: | |
155aba94 | 1823 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
1824 | right = left; |
1825 | left = sv_2mortal(newSViv(0)); | |
1826 | lr = 1; | |
1827 | } | |
1828 | break; | |
f216259d | 1829 | case int_amg: |
f5284f61 | 1830 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d NIS |
1831 | /* FAIL safe */ |
1832 | return NULL; /* Delegate operation to standard mechanisms. */ | |
1833 | break; | |
f5284f61 IZ |
1834 | case to_sv_amg: |
1835 | case to_av_amg: | |
1836 | case to_hv_amg: | |
1837 | case to_gv_amg: | |
1838 | case to_cv_amg: | |
1839 | /* FAIL safe */ | |
b267980d | 1840 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 | 1841 | break; |
a0d0e21e LW |
1842 | default: |
1843 | goto not_found; | |
1844 | } | |
1845 | if (!cv) goto not_found; | |
1846 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
25716404 GS |
1847 | && (stash = SvSTASH(SvRV(right))) |
1848 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1849 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1850 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 1851 | : NULL)) |
a0d0e21e LW |
1852 | && (cv = cvp[off=method])) { /* Method for right |
1853 | * argument found */ | |
1854 | lr=1; | |
b267980d NIS |
1855 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1856 | && (cvp=ocvp) && (lr = -1)) | |
a0d0e21e LW |
1857 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1858 | && !(flags & AMGf_unary)) { | |
1859 | /* We look for substitution for | |
1860 | * comparison operations and | |
fc36a67e | 1861 | * concatenation */ |
a0d0e21e LW |
1862 | if (method==concat_amg || method==concat_ass_amg |
1863 | || method==repeat_amg || method==repeat_ass_amg) { | |
1864 | return NULL; /* Delegate operation to string conversion */ | |
1865 | } | |
1866 | off = -1; | |
1867 | switch (method) { | |
1868 | case lt_amg: | |
1869 | case le_amg: | |
1870 | case gt_amg: | |
1871 | case ge_amg: | |
1872 | case eq_amg: | |
1873 | case ne_amg: | |
1874 | postpr = 1; off=ncmp_amg; break; | |
1875 | case slt_amg: | |
1876 | case sle_amg: | |
1877 | case sgt_amg: | |
1878 | case sge_amg: | |
1879 | case seq_amg: | |
1880 | case sne_amg: | |
1881 | postpr = 1; off=scmp_amg; break; | |
1882 | } | |
1883 | if (off != -1) cv = cvp[off]; | |
1884 | if (!cv) { | |
1885 | goto not_found; | |
1886 | } | |
1887 | } else { | |
a6006777 | 1888 | not_found: /* No method found, either report or croak */ |
b267980d | 1889 | switch (method) { |
d11ee47c RD |
1890 | case lt_amg: |
1891 | case le_amg: | |
1892 | case gt_amg: | |
1893 | case ge_amg: | |
1894 | case eq_amg: | |
1895 | case ne_amg: | |
1896 | case slt_amg: | |
1897 | case sle_amg: | |
1898 | case sgt_amg: | |
1899 | case sge_amg: | |
1900 | case seq_amg: | |
1901 | case sne_amg: | |
1902 | postpr = 0; break; | |
b267980d NIS |
1903 | case to_sv_amg: |
1904 | case to_av_amg: | |
1905 | case to_hv_amg: | |
1906 | case to_gv_amg: | |
1907 | case to_cv_amg: | |
1908 | /* FAIL safe */ | |
1909 | return left; /* Delegate operation to standard mechanisms. */ | |
1910 | break; | |
1911 | } | |
a0d0e21e LW |
1912 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1913 | notfound = 1; lr = -1; | |
1914 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
1915 | notfound = 1; lr = 1; | |
4cc0ca18 NC |
1916 | } else if ((amtp && amtp->fallback >= AMGfallYES) && !DEBUG_o_TEST) { |
1917 | /* Skip generating the "no method found" message. */ | |
1918 | return NULL; | |
a0d0e21e | 1919 | } else { |
46fc3d4c | 1920 | SV *msg; |
774d564b | 1921 | if (off==-1) off=method; |
b267980d | 1922 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 | 1923 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 | 1924 | AMG_id2name(method + assignshift), |
e7ea3e70 | 1925 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d | 1926 | SvAMAGIC(left)? |
a0d0e21e LW |
1927 | "in overloaded package ": |
1928 | "has no overloaded magic", | |
b267980d | 1929 | SvAMAGIC(left)? |
bfcb3514 | 1930 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e | 1931 | "", |
b267980d | 1932 | SvAMAGIC(right)? |
e7ea3e70 | 1933 | ",\n\tright argument in overloaded package ": |
b267980d | 1934 | (flags & AMGf_unary |
e7ea3e70 IZ |
1935 | ? "" |
1936 | : ",\n\tright argument has no overloaded magic"), | |
b267980d | 1937 | SvAMAGIC(right)? |
bfcb3514 | 1938 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c | 1939 | "")); |
a0d0e21e | 1940 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 | 1941 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e | 1942 | } else { |
be2597df | 1943 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e LW |
1944 | } |
1945 | return NULL; | |
1946 | } | |
ee239bfe | 1947 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
1948 | } |
1949 | } | |
497b47a8 | 1950 | #ifdef DEBUGGING |
a0d0e21e | 1951 | if (!notfound) { |
497b47a8 | 1952 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 | 1953 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 JH |
1954 | AMG_id2name(off), |
1955 | method+assignshift==off? "" : | |
a0288114 | 1956 | " (initially \"", |
497b47a8 JH |
1957 | method+assignshift==off? "" : |
1958 | AMG_id2name(method+assignshift), | |
a0288114 | 1959 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
1960 | flags & AMGf_unary? "" : |
1961 | lr==1 ? " for right argument": " for left argument", | |
1962 | flags & AMGf_unary? " for argument" : "", | |
bfcb3514 | 1963 | stash ? HvNAME_get(stash) : "null", |
497b47a8 | 1964 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 1965 | } |
497b47a8 | 1966 | #endif |
748a9306 LW |
1967 | /* Since we use shallow copy during assignment, we need |
1968 | * to dublicate the contents, probably calling user-supplied | |
1969 | * version of copy operator | |
1970 | */ | |
ee239bfe IZ |
1971 | /* We need to copy in following cases: |
1972 | * a) Assignment form was called. | |
1973 | * assignshift==1, assign==T, method + 1 == off | |
1974 | * b) Increment or decrement, called directly. | |
1975 | * assignshift==0, assign==0, method + 0 == off | |
1976 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 1977 | * assignshift==0, assign==T, |
ee239bfe IZ |
1978 | * force_cpy == T |
1979 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 1980 | * assignshift==0, assign==0, |
ee239bfe IZ |
1981 | * force_cpy == T |
1982 | * e) Assignment form translated to nomethod. | |
1983 | * assignshift==1, assign==T, method + 1 != off | |
1984 | * force_cpy == T | |
1985 | */ | |
1986 | /* off is method, method+assignshift, or a result of opcode substitution. | |
1987 | * In the latter case assignshift==0, so only notfound case is important. | |
1988 | */ | |
1989 | if (( (method + assignshift == off) | |
1990 | && (assign || (method == inc_amg) || (method == dec_amg))) | |
1991 | || force_cpy) | |
1992 | RvDEEPCP(left); | |
a0d0e21e LW |
1993 | { |
1994 | dSP; | |
1995 | BINOP myop; | |
1996 | SV* res; | |
b7787f18 | 1997 | const bool oldcatch = CATCH_GET; |
a0d0e21e | 1998 | |
54310121 | 1999 | CATCH_SET(TRUE); |
a0d0e21e LW |
2000 | Zero(&myop, 1, BINOP); |
2001 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 2002 | myop.op_next = NULL; |
54310121 | 2003 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e | 2004 | |
e788e7d3 | 2005 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 2006 | ENTER; |
462e5cf6 | 2007 | SAVEOP(); |
533c011a | 2008 | PL_op = (OP *) &myop; |
3280af22 | 2009 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 2010 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 2011 | PUTBACK; |
cea2e8a9 | 2012 | pp_pushmark(); |
a0d0e21e | 2013 | |
924508f0 | 2014 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
2015 | PUSHs(lr>0? right: left); |
2016 | PUSHs(lr>0? left: right); | |
3280af22 | 2017 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 2018 | if (notfound) { |
89ffc314 | 2019 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e LW |
2020 | } |
2021 | PUSHs((SV*)cv); | |
2022 | PUTBACK; | |
2023 | ||
155aba94 | 2024 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 | 2025 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
2026 | LEAVE; |
2027 | SPAGAIN; | |
2028 | ||
2029 | res=POPs; | |
ebafeae7 | 2030 | PUTBACK; |
d3acc0f7 | 2031 | POPSTACK; |
54310121 | 2032 | CATCH_SET(oldcatch); |
a0d0e21e | 2033 | |
a0d0e21e | 2034 | if (postpr) { |
b7787f18 | 2035 | int ans; |
a0d0e21e LW |
2036 | switch (method) { |
2037 | case le_amg: | |
2038 | case sle_amg: | |
2039 | ans=SvIV(res)<=0; break; | |
2040 | case lt_amg: | |
2041 | case slt_amg: | |
2042 | ans=SvIV(res)<0; break; | |
2043 | case ge_amg: | |
2044 | case sge_amg: | |
2045 | ans=SvIV(res)>=0; break; | |
2046 | case gt_amg: | |
2047 | case sgt_amg: | |
2048 | ans=SvIV(res)>0; break; | |
2049 | case eq_amg: | |
2050 | case seq_amg: | |
2051 | ans=SvIV(res)==0; break; | |
2052 | case ne_amg: | |
2053 | case sne_amg: | |
2054 | ans=SvIV(res)!=0; break; | |
2055 | case inc_amg: | |
2056 | case dec_amg: | |
bbce6d69 | 2057 | SvSetSV(left,res); return left; |
dc437b57 | 2058 | case not_amg: |
fe7ac86a | 2059 | ans=!SvTRUE(res); break; |
b7787f18 AL |
2060 | default: |
2061 | ans=0; break; | |
a0d0e21e | 2062 | } |
54310121 | 2063 | return boolSV(ans); |
748a9306 LW |
2064 | } else if (method==copy_amg) { |
2065 | if (!SvROK(res)) { | |
cea2e8a9 | 2066 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
2067 | } |
2068 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
2069 | } else { |
2070 | return res; | |
2071 | } | |
2072 | } | |
2073 | } | |
c9d5ac95 GS |
2074 | |
2075 | /* | |
7fc63493 | 2076 | =for apidoc is_gv_magical_sv |
c9d5ac95 | 2077 | |
7a5fd60d NC |
2078 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
2079 | ||
2080 | =cut | |
2081 | */ | |
2082 | ||
2083 | bool | |
2084 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) | |
2085 | { | |
2086 | STRLEN len; | |
b64e5050 | 2087 | const char * const temp = SvPV_const(name, len); |
7a5fd60d NC |
2088 | return is_gv_magical(temp, len, flags); |
2089 | } | |
2090 | ||
2091 | /* | |
2092 | =for apidoc is_gv_magical | |
2093 | ||
c9d5ac95 GS |
2094 | Returns C<TRUE> if given the name of a magical GV. |
2095 | ||
2096 | Currently only useful internally when determining if a GV should be | |
2097 | created even in rvalue contexts. | |
2098 | ||
2099 | C<flags> is not used at present but available for future extension to | |
2100 | allow selecting particular classes of magical variable. | |
2101 | ||
b9b0e72c NC |
2102 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
2103 | This assumption is met by all callers within the perl core, which all pass | |
2104 | pointers returned by SvPV. | |
2105 | ||
c9d5ac95 GS |
2106 | =cut |
2107 | */ | |
2108 | bool | |
7fc63493 | 2109 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 | 2110 | { |
b37c2d43 | 2111 | PERL_UNUSED_CONTEXT; |
9d4ba2ae AL |
2112 | PERL_UNUSED_ARG(flags); |
2113 | ||
b9b0e72c | 2114 | if (len > 1) { |
b464bac0 | 2115 | const char * const name1 = name + 1; |
b9b0e72c NC |
2116 | switch (*name) { |
2117 | case 'I': | |
9431620d | 2118 | if (len == 3 && name1[1] == 'S' && name[2] == 'A') |
b9b0e72c NC |
2119 | goto yes; |
2120 | break; | |
2121 | case 'O': | |
9431620d | 2122 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c NC |
2123 | goto yes; |
2124 | break; | |
2125 | case 'S': | |
9431620d | 2126 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c NC |
2127 | goto yes; |
2128 | break; | |
2129 | /* Using ${^...} variables is likely to be sufficiently rare that | |
2130 | it seems sensible to avoid the space hit of also checking the | |
2131 | length. */ | |
2132 | case '\017': /* ${^OPEN} */ | |
9431620d | 2133 | if (strEQ(name1, "PEN")) |
b9b0e72c NC |
2134 | goto yes; |
2135 | break; | |
2136 | case '\024': /* ${^TAINT} */ | |
9431620d | 2137 | if (strEQ(name1, "AINT")) |
b9b0e72c NC |
2138 | goto yes; |
2139 | break; | |
2140 | case '\025': /* ${^UNICODE} */ | |
9431620d | 2141 | if (strEQ(name1, "NICODE")) |
b9b0e72c | 2142 | goto yes; |
a0288114 | 2143 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 | 2144 | goto yes; |
b9b0e72c NC |
2145 | break; |
2146 | case '\027': /* ${^WARNING_BITS} */ | |
9431620d | 2147 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c NC |
2148 | goto yes; |
2149 | break; | |
2150 | case '1': | |
2151 | case '2': | |
2152 | case '3': | |
2153 | case '4': | |
2154 | case '5': | |
2155 | case '6': | |
2156 | case '7': | |
2157 | case '8': | |
2158 | case '9': | |
c9d5ac95 | 2159 | { |
7fc63493 | 2160 | const char *end = name + len; |
c9d5ac95 GS |
2161 | while (--end > name) { |
2162 | if (!isDIGIT(*end)) | |
2163 | return FALSE; | |
2164 | } | |
b9b0e72c NC |
2165 | goto yes; |
2166 | } | |
2167 | } | |
2168 | } else { | |
2169 | /* Because we're already assuming that name is NUL terminated | |
2170 | below, we can treat an empty name as "\0" */ | |
2171 | switch (*name) { | |
2172 | case '&': | |
2173 | case '`': | |
2174 | case '\'': | |
2175 | case ':': | |
2176 | case '?': | |
2177 | case '!': | |
2178 | case '-': | |
2179 | case '#': | |
2180 | case '[': | |
2181 | case '^': | |
2182 | case '~': | |
2183 | case '=': | |
2184 | case '%': | |
2185 | case '.': | |
2186 | case '(': | |
2187 | case ')': | |
2188 | case '<': | |
2189 | case '>': | |
2190 | case ',': | |
2191 | case '\\': | |
2192 | case '/': | |
2193 | case '|': | |
2194 | case '+': | |
2195 | case ';': | |
2196 | case ']': | |
2197 | case '\001': /* $^A */ | |
2198 | case '\003': /* $^C */ | |
2199 | case '\004': /* $^D */ | |
2200 | case '\005': /* $^E */ | |
2201 | case '\006': /* $^F */ | |
2202 | case '\010': /* $^H */ | |
2203 | case '\011': /* $^I, NOT \t in EBCDIC */ | |
2204 | case '\014': /* $^L */ | |
2205 | case '\016': /* $^N */ | |
2206 | case '\017': /* $^O */ | |
2207 | case '\020': /* $^P */ | |
2208 | case '\023': /* $^S */ | |
2209 | case '\024': /* $^T */ | |
2210 | case '\026': /* $^V */ | |
2211 | case '\027': /* $^W */ | |
2212 | case '1': | |
2213 | case '2': | |
2214 | case '3': | |
2215 | case '4': | |
2216 | case '5': | |
2217 | case '6': | |
2218 | case '7': | |
2219 | case '8': | |
2220 | case '9': | |
2221 | yes: | |
2222 | return TRUE; | |
2223 | default: | |
2224 | break; | |
c9d5ac95 | 2225 | } |
c9d5ac95 GS |
2226 | } |
2227 | return FALSE; | |
2228 | } | |
66610fdd | 2229 | |
f5c1e807 NC |
2230 | void |
2231 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
2232 | { | |
2233 | dVAR; | |
acda4c6a | 2234 | U32 hash; |
f5c1e807 | 2235 | |
9f616d01 | 2236 | assert(name); |
f5c1e807 NC |
2237 | PERL_UNUSED_ARG(flags); |
2238 | ||
acda4c6a NC |
2239 | if (len > I32_MAX) |
2240 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); | |
2241 | ||
ae8cc45f NC |
2242 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2243 | unshare_hek(GvNAME_HEK(gv)); | |
2244 | } | |
2245 | ||
acda4c6a | 2246 | PERL_HASH(hash, name, len); |
9f616d01 | 2247 | GvNAME_HEK(gv) = share_hek(name, len, hash); |
f5c1e807 NC |
2248 | } |
2249 | ||
66610fdd RGS |
2250 | /* |
2251 | * Local variables: | |
2252 | * c-indentation-style: bsd | |
2253 | * c-basic-offset: 4 | |
2254 | * indent-tabs-mode: t | |
2255 | * End: | |
2256 | * | |
37442d52 RGS |
2257 | * ex: set ts=8 sts=4 sw=4 noet: |
2258 | */ |