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 | ||
3280af22 | 263 | PL_sub_generation++; |
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: | |
294 | (void)GvSVn(gv); | |
295 | #endif | |
a0d0e21e LW |
296 | } |
297 | } | |
298 | ||
954c1994 GS |
299 | /* |
300 | =for apidoc gv_fetchmeth | |
301 | ||
302 | Returns the glob with the given C<name> and a defined subroutine or | |
303 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
07766739 | 304 | accessible via @ISA and UNIVERSAL::. |
954c1994 GS |
305 | |
306 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
307 | side-effect creates a glob with the given C<name> in the given C<stash> | |
308 | which in the case of success contains an alias for the subroutine, and sets | |
b267980d | 309 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 GS |
310 | |
311 | This function grants C<"SUPER"> token as a postfix of the stash name. The | |
312 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not | |
4929bf7b | 313 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 314 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 315 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
316 | |
317 | =cut | |
318 | */ | |
319 | ||
79072805 | 320 | GV * |
864dbfa3 | 321 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 | 322 | { |
97aff369 | 323 | dVAR; |
79072805 | 324 | AV* av; |
463ee0b2 | 325 | GV* topgv; |
79072805 | 326 | GV* gv; |
463ee0b2 | 327 | GV** gvp; |
748a9306 | 328 | CV* cv; |
bfcb3514 | 329 | const char *hvname; |
10edeb5d | 330 | HV* lastchance = NULL; |
a0d0e21e | 331 | |
af09ea45 IK |
332 | /* UNIVERSAL methods should be callable without a stash */ |
333 | if (!stash) { | |
334 | level = -1; /* probably appropriate */ | |
da51bb9b | 335 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
336 | return 0; |
337 | } | |
338 | ||
bfcb3514 NC |
339 | hvname = HvNAME_get(stash); |
340 | if (!hvname) | |
e27ad1f2 AV |
341 | Perl_croak(aTHX_ |
342 | "Can't use anonymous symbol table for method lookup"); | |
343 | ||
44a8e56a | 344 | if ((level > 100) || (level < -100)) |
cea2e8a9 | 345 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
bfcb3514 | 346 | name, hvname); |
463ee0b2 | 347 | |
bfcb3514 | 348 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a | 349 | |
350 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
351 | if (!gvp) | |
a0714e2c | 352 | topgv = NULL; |
44a8e56a | 353 | else { |
354 | topgv = *gvp; | |
355 | if (SvTYPE(topgv) != SVt_PVGV) | |
356 | gv_init(topgv, stash, name, len, TRUE); | |
155aba94 | 357 | if ((cv = GvCV(topgv))) { |
44a8e56a | 358 | /* If genuine method or valid cache entry, use it */ |
3280af22 | 359 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 | 360 | return topgv; |
44a8e56a | 361 | /* Stale cached entry: junk it */ |
362 | SvREFCNT_dec(cv); | |
601f1833 | 363 | GvCV(topgv) = cv = NULL; |
44a8e56a | 364 | GvCVGEN(topgv) = 0; |
748a9306 | 365 | } |
3280af22 | 366 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c | 367 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 | 368 | } |
79072805 | 369 | |
017a3ce5 | 370 | gvp = (GV**)hv_fetchs(stash, "ISA", FALSE); |
7d49f689 | 371 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : NULL; |
9607fc9c | 372 | |
fb73857a | 373 | /* create and re-create @.*::SUPER::ISA on demand */ |
374 | if (!av || !SvMAGIC(av)) { | |
7423f6db | 375 | STRLEN packlen = HvNAMELEN_get(stash); |
9607fc9c | 376 | |
bfcb3514 | 377 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { |
9607fc9c | 378 | HV* basestash; |
379 | ||
380 | packlen -= 7; | |
da51bb9b | 381 | basestash = gv_stashpvn(hvname, packlen, GV_ADD); |
017a3ce5 | 382 | gvp = (GV**)hv_fetchs(basestash, "ISA", FALSE); |
3280af22 | 383 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
017a3ce5 | 384 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); |
9607fc9c | 385 | if (!gvp || !(gv = *gvp)) |
bfcb3514 | 386 | Perl_croak(aTHX_ "Cannot create %s::ISA", hvname); |
9607fc9c | 387 | if (SvTYPE(gv) != SVt_PVGV) |
388 | gv_init(gv, stash, "ISA", 3, TRUE); | |
389 | SvREFCNT_dec(GvAV(gv)); | |
b37c2d43 | 390 | GvAV(gv) = (AV*)SvREFCNT_inc_simple(av); |
9607fc9c | 391 | } |
392 | } | |
393 | } | |
394 | ||
395 | if (av) { | |
79072805 | 396 | SV** svp = AvARRAY(av); |
93965878 NIS |
397 | /* NOTE: No support for tied ISA */ |
398 | I32 items = AvFILLp(av) + 1; | |
79072805 | 399 | while (items--) { |
823a54a3 | 400 | SV* const sv = *svp++; |
da51bb9b | 401 | HV* const basestash = gv_stashsv(sv, 0); |
9bbf4081 | 402 | if (!basestash) { |
599cee73 | 403 | if (ckWARN(WARN_MISC)) |
35c1215d | 404 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA", |
be2597df | 405 | SVfARG(sv), hvname); |
79072805 LW |
406 | continue; |
407 | } | |
44a8e56a | 408 | gv = gv_fetchmeth(basestash, name, len, |
409 | (level >= 0) ? level + 1 : level - 1); | |
410 | if (gv) | |
411 | goto gotcha; | |
79072805 LW |
412 | } |
413 | } | |
a0d0e21e | 414 | |
9607fc9c | 415 | /* if at top level, try UNIVERSAL */ |
416 | ||
44a8e56a | 417 | if (level == 0 || level == -1) { |
da51bb9b | 418 | lastchance = gv_stashpvs("UNIVERSAL", 0); |
9607fc9c | 419 | |
823a54a3 | 420 | if (lastchance) { |
155aba94 GS |
421 | if ((gv = gv_fetchmeth(lastchance, name, len, |
422 | (level >= 0) ? level + 1 : level - 1))) | |
423 | { | |
44a8e56a | 424 | gotcha: |
dc848c6f | 425 | /* |
426 | * Cache method in topgv if: | |
427 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
428 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
429 | */ | |
430 | if (topgv && | |
431 | GvREFCNT(topgv) == 1 && | |
432 | (cv = GvCV(gv)) && | |
433 | (CvROOT(cv) || CvXSUB(cv))) | |
434 | { | |
155aba94 | 435 | if ((cv = GvCV(topgv))) |
44a8e56a | 436 | SvREFCNT_dec(cv); |
437 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); | |
3280af22 | 438 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a | 439 | } |
a0d0e21e LW |
440 | return gv; |
441 | } | |
005a453c JP |
442 | else if (topgv && GvREFCNT(topgv) == 1) { |
443 | /* cache the fact that the method is not defined */ | |
3280af22 | 444 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c | 445 | } |
a0d0e21e LW |
446 | } |
447 | } | |
448 | ||
79072805 LW |
449 | return 0; |
450 | } | |
451 | ||
954c1994 | 452 | /* |
611c1e95 IZ |
453 | =for apidoc gv_fetchmeth_autoload |
454 | ||
455 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. | |
456 | Returns a glob for the subroutine. | |
457 | ||
458 | For an autoloaded subroutine without a GV, will create a GV even | |
459 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() | |
460 | of the result may be zero. | |
461 | ||
462 | =cut | |
463 | */ | |
464 | ||
465 | GV * | |
466 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) | |
467 | { | |
468 | GV *gv = gv_fetchmeth(stash, name, len, level); | |
469 | ||
470 | if (!gv) { | |
611c1e95 IZ |
471 | CV *cv; |
472 | GV **gvp; | |
473 | ||
474 | if (!stash) | |
6136c704 | 475 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
5c7983e5 | 476 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
6136c704 | 477 | return NULL; |
5c7983e5 | 478 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
6136c704 | 479 | return NULL; |
611c1e95 IZ |
480 | cv = GvCV(gv); |
481 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 482 | return NULL; |
611c1e95 IZ |
483 | /* Have an autoload */ |
484 | if (level < 0) /* Cannot do without a stub */ | |
485 | gv_fetchmeth(stash, name, len, 0); | |
486 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
487 | if (!gvp) | |
6136c704 | 488 | return NULL; |
611c1e95 IZ |
489 | return *gvp; |
490 | } | |
491 | return gv; | |
492 | } | |
493 | ||
494 | /* | |
954c1994 GS |
495 | =for apidoc gv_fetchmethod_autoload |
496 | ||
497 | Returns the glob which contains the subroutine to call to invoke the method | |
498 | on the C<stash>. In fact in the presence of autoloading this may be the | |
499 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is | |
b267980d | 500 | already setup. |
954c1994 GS |
501 | |
502 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
503 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 504 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 505 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 506 | with a non-zero C<autoload> parameter. |
954c1994 GS |
507 | |
508 | These functions grant C<"SUPER"> token as a prefix of the method name. Note | |
509 | that if you want to keep the returned glob for a long time, you need to | |
510 | check for it being "AUTOLOAD", since at the later time the call may load a | |
511 | different subroutine due to $AUTOLOAD changing its value. Use the glob | |
b267980d | 512 | created via a side effect to do this. |
954c1994 GS |
513 | |
514 | These functions have the same side-effects and as C<gv_fetchmeth> with | |
515 | C<level==0>. C<name> should be writable if contains C<':'> or C<' | |
516 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to | |
b267980d | 517 | C<call_sv> apply equally to these functions. |
954c1994 GS |
518 | |
519 | =cut | |
520 | */ | |
521 | ||
dc848c6f | 522 | GV * |
864dbfa3 | 523 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 524 | { |
97aff369 | 525 | dVAR; |
08105a92 | 526 | register const char *nend; |
c445ea15 | 527 | const char *nsplit = NULL; |
a0d0e21e | 528 | GV* gv; |
0dae17bd GS |
529 | HV* ostash = stash; |
530 | ||
531 | if (stash && SvTYPE(stash) < SVt_PVHV) | |
5c284bb0 | 532 | stash = NULL; |
b267980d | 533 | |
463ee0b2 | 534 | for (nend = name; *nend; nend++) { |
9607fc9c | 535 | if (*nend == '\'') |
a0d0e21e | 536 | nsplit = nend; |
9607fc9c | 537 | else if (*nend == ':' && *(nend + 1) == ':') |
538 | nsplit = ++nend; | |
a0d0e21e LW |
539 | } |
540 | if (nsplit) { | |
9d4ba2ae | 541 | const char * const origname = name; |
a0d0e21e | 542 | name = nsplit + 1; |
a0d0e21e LW |
543 | if (*nsplit == ':') |
544 | --nsplit; | |
9607fc9c | 545 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
546 | /* ->SUPER::method should really be looked up in original stash */ | |
b37c2d43 | 547 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 | 548 | CopSTASHPV(PL_curcop))); |
af09ea45 | 549 | /* __PACKAGE__::SUPER stash should be autovivified */ |
da51bb9b | 550 | stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), GV_ADD); |
cea2e8a9 | 551 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 | 552 | origname, HvNAME_get(stash), name) ); |
4633a7c4 | 553 | } |
e189a56d | 554 | else { |
af09ea45 | 555 | /* don't autovifify if ->NoSuchStash::method */ |
da51bb9b | 556 | stash = gv_stashpvn(origname, nsplit - origname, 0); |
e189a56d IK |
557 | |
558 | /* however, explicit calls to Pkg::SUPER::method may | |
559 | happen, and may require autovivification to work */ | |
560 | if (!stash && (nsplit - origname) >= 7 && | |
561 | strnEQ(nsplit - 7, "::SUPER", 7) && | |
da51bb9b NC |
562 | gv_stashpvn(origname, nsplit - origname - 7, 0)) |
563 | stash = gv_stashpvn(origname, nsplit - origname, GV_ADD); | |
e189a56d | 564 | } |
0dae17bd | 565 | ostash = stash; |
4633a7c4 LW |
566 | } |
567 | ||
9607fc9c | 568 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 569 | if (!gv) { |
2f6e0fe7 | 570 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 | 571 | gv = (GV*)&PL_sv_yes; |
dc848c6f | 572 | else if (autoload) |
0dae17bd | 573 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 | 574 | } |
dc848c6f | 575 | else if (autoload) { |
9d4ba2ae | 576 | CV* const cv = GvCV(gv); |
09280a33 CS |
577 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
578 | GV* stubgv; | |
579 | GV* autogv; | |
580 | ||
581 | if (CvANON(cv)) | |
582 | stubgv = gv; | |
583 | else { | |
584 | stubgv = CvGV(cv); | |
585 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
586 | stubgv = gv; | |
587 | } | |
588 | autogv = gv_autoload4(GvSTASH(stubgv), | |
589 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 590 | if (autogv) |
591 | gv = autogv; | |
592 | } | |
593 | } | |
44a8e56a | 594 | |
595 | return gv; | |
596 | } | |
597 | ||
598 | GV* | |
864dbfa3 | 599 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a | 600 | { |
27da23d5 | 601 | dVAR; |
44a8e56a | 602 | GV* gv; |
603 | CV* cv; | |
604 | HV* varstash; | |
605 | GV* vargv; | |
606 | SV* varsv; | |
e1ec3a88 | 607 | const char *packname = ""; |
eae70eaa | 608 | STRLEN packname_len = 0; |
44a8e56a | 609 | |
5c7983e5 | 610 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
a0714e2c | 611 | return NULL; |
0dae17bd GS |
612 | if (stash) { |
613 | if (SvTYPE(stash) < SVt_PVHV) { | |
e62f0680 | 614 | packname = SvPV_const((SV*)stash, packname_len); |
5c284bb0 | 615 | stash = NULL; |
0dae17bd GS |
616 | } |
617 | else { | |
bfcb3514 | 618 | packname = HvNAME_get(stash); |
7423f6db | 619 | packname_len = HvNAMELEN_get(stash); |
0dae17bd GS |
620 | } |
621 | } | |
5c7983e5 | 622 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
a0714e2c | 623 | return NULL; |
dc848c6f | 624 | cv = GvCV(gv); |
625 | ||
adb5a9ae | 626 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 627 | return NULL; |
ed850460 | 628 | |
dc848c6f | 629 | /* |
630 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
631 | */ | |
041457d9 DM |
632 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
633 | && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) | |
634 | ) | |
12bcd1a6 | 635 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f | 636 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd | 637 | packname, (int)len, name); |
44a8e56a | 638 | |
aed2304a | 639 | if (CvISXSUB(cv)) { |
adb5a9ae DM |
640 | /* rather than lookup/init $AUTOLOAD here |
641 | * only to have the XSUB do another lookup for $AUTOLOAD | |
642 | * and split that value on the last '::', | |
643 | * pass along the same data via some unused fields in the CV | |
644 | */ | |
645 | CvSTASH(cv) = stash; | |
f880fe2f | 646 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 | 647 | SvCUR_set(cv, len); |
adb5a9ae DM |
648 | return gv; |
649 | } | |
adb5a9ae | 650 | |
44a8e56a | 651 | /* |
652 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
653 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
654 | * use that, but for lack of anything better we will use the sub's | |
655 | * original package to look up $AUTOLOAD. | |
656 | */ | |
657 | varstash = GvSTASH(CvGV(cv)); | |
5c7983e5 | 658 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
659 | ENTER; |
660 | ||
c69033f2 | 661 | if (!isGV(vargv)) { |
5c7983e5 | 662 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 | 663 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 664 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
665 | #endif |
666 | } | |
3d35f11b | 667 | LEAVE; |
e203899d | 668 | varsv = GvSVn(vargv); |
7423f6db | 669 | sv_setpvn(varsv, packname, packname_len); |
396482e1 | 670 | sv_catpvs(varsv, "::"); |
44a8e56a | 671 | sv_catpvn(varsv, name, len); |
a0d0e21e LW |
672 | return gv; |
673 | } | |
674 | ||
44a2ac75 YO |
675 | |
676 | /* require_tie_mod() internal routine for requiring a module | |
677 | * that implements the logic of automatical ties like %! and %- | |
678 | * | |
679 | * The "gv" parameter should be the glob. | |
680 | * "varpv" holds the name of the var, used for error messages | |
681 | * "namesv" holds the module name | |
682 | * "methpv" holds the method name to test for to check that things | |
683 | * are working reasonably close to as expected | |
684 | * "flags" if flag & 1 then save the scalar before loading. | |
685 | * For the protection of $! to work (it is set by this routine) | |
686 | * the sv slot must already be magicalized. | |
d2c93421 | 687 | */ |
44a2ac75 YO |
688 | STATIC HV* |
689 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) | |
d2c93421 | 690 | { |
27da23d5 | 691 | dVAR; |
da51bb9b | 692 | HV* stash = gv_stashsv(namesv, 0); |
44a2ac75 YO |
693 | |
694 | if (!stash || !(gv_fetchmethod(stash, methpv))) { | |
695 | SV *module = newSVsv(namesv); | |
d2c93421 RH |
696 | dSP; |
697 | PUTBACK; | |
698 | ENTER; | |
44a2ac75 YO |
699 | if ( flags & 1 ) |
700 | save_scalar(gv); | |
701 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); | |
d2c93421 RH |
702 | LEAVE; |
703 | SPAGAIN; | |
da51bb9b | 704 | stash = gv_stashsv(namesv, 0); |
44a2ac75 YO |
705 | if (!stash) |
706 | Perl_croak( aTHX_ "panic: Can't use %%%s because %"SVf" is not available", | |
5ea31154 | 707 | varpv, SVfARG(module)); |
44a2ac75 YO |
708 | else if (!gv_fetchmethod(stash, methpv)) |
709 | Perl_croak( aTHX_ "panic: Can't use %%%s because %"SVf" does not support method %s", | |
5ea31154 | 710 | varpv, SVfARG(module), methpv); |
d2c93421 | 711 | } |
44a2ac75 | 712 | return stash; |
d2c93421 RH |
713 | } |
714 | ||
954c1994 GS |
715 | /* |
716 | =for apidoc gv_stashpv | |
717 | ||
da51bb9b | 718 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 719 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
720 | |
721 | =cut | |
722 | */ | |
723 | ||
a0d0e21e | 724 | HV* |
864dbfa3 | 725 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 726 | { |
dc437b57 | 727 | return gv_stashpvn(name, strlen(name), create); |
728 | } | |
729 | ||
bc96cb06 SH |
730 | /* |
731 | =for apidoc gv_stashpvn | |
732 | ||
da51bb9b NC |
733 | Returns a pointer to the stash for a specified package. The C<namelen> |
734 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
735 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
736 | created if it does not already exist. If the package does not exist and | |
737 | C<flags> is 0 (or any other setting that does not create packages) then NULL | |
738 | is returned. | |
739 | ||
bc96cb06 SH |
740 | |
741 | =cut | |
742 | */ | |
743 | ||
dc437b57 | 744 | HV* |
da51bb9b | 745 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 746 | { |
0cea0058 | 747 | char smallbuf[128]; |
46fc3d4c | 748 | char *tmpbuf; |
a0d0e21e LW |
749 | HV *stash; |
750 | GV *tmpgv; | |
dc437b57 | 751 | |
798b63bc | 752 | if (namelen + 2 <= sizeof smallbuf) |
46fc3d4c | 753 | tmpbuf = smallbuf; |
754 | else | |
2ae0db35 | 755 | Newx(tmpbuf, namelen + 2, char); |
dc437b57 | 756 | Copy(name,tmpbuf,namelen,char); |
757 | tmpbuf[namelen++] = ':'; | |
758 | tmpbuf[namelen++] = ':'; | |
da51bb9b | 759 | tmpgv = gv_fetchpvn_flags(tmpbuf, namelen, flags, SVt_PVHV); |
46fc3d4c | 760 | if (tmpbuf != smallbuf) |
761 | Safefree(tmpbuf); | |
a0d0e21e | 762 | if (!tmpgv) |
da51bb9b | 763 | return NULL; |
a0d0e21e LW |
764 | if (!GvHV(tmpgv)) |
765 | GvHV(tmpgv) = newHV(); | |
766 | stash = GvHV(tmpgv); | |
bfcb3514 | 767 | if (!HvNAME_get(stash)) |
51a37f80 | 768 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e | 769 | return stash; |
463ee0b2 LW |
770 | } |
771 | ||
954c1994 GS |
772 | /* |
773 | =for apidoc gv_stashsv | |
774 | ||
da51bb9b | 775 | Returns a pointer to the stash for a specified package. See C<gv_stashpvn>. |
954c1994 GS |
776 | |
777 | =cut | |
778 | */ | |
779 | ||
a0d0e21e | 780 | HV* |
da51bb9b | 781 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 782 | { |
dc437b57 | 783 | STRLEN len; |
9d4ba2ae | 784 | const char * const ptr = SvPV_const(sv,len); |
da51bb9b | 785 | return gv_stashpvn(ptr, len, flags); |
a0d0e21e LW |
786 | } |
787 | ||
788 | ||
463ee0b2 | 789 | GV * |
7a5fd60d | 790 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { |
b7787f18 | 791 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
792 | } |
793 | ||
794 | GV * | |
795 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) { | |
796 | STRLEN len; | |
9d4ba2ae | 797 | const char * const nambeg = SvPV_const(name, len); |
7a5fd60d NC |
798 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
799 | } | |
800 | ||
801 | GV * | |
802 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
803 | I32 sv_type) | |
79072805 | 804 | { |
97aff369 | 805 | dVAR; |
08105a92 | 806 | register const char *name = nambeg; |
c445ea15 | 807 | register GV *gv = NULL; |
79072805 | 808 | GV**gvp; |
79072805 | 809 | I32 len; |
b3d904f3 | 810 | register const char *name_cursor; |
c445ea15 | 811 | HV *stash = NULL; |
add2581e | 812 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a | 813 | const I32 no_expand = flags & GV_NOEXPAND; |
780a5241 | 814 | const I32 add = flags & ~GV_NOADD_MASK; |
b3d904f3 NC |
815 | const char *const name_end = nambeg + full_len; |
816 | const char *const name_em1 = name_end - 1; | |
79072805 | 817 | |
fafc274c NC |
818 | if (flags & GV_NOTQUAL) { |
819 | /* Caller promised that there is no stash, so we can skip the check. */ | |
820 | len = full_len; | |
821 | goto no_stash; | |
822 | } | |
823 | ||
b208e10c NC |
824 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
825 | /* accidental stringify on a GV? */ | |
c07a80fd | 826 | name++; |
b208e10c | 827 | } |
c07a80fd | 828 | |
b3d904f3 NC |
829 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
830 | if ((*name_cursor == ':' && name_cursor < name_em1 | |
831 | && name_cursor[1] == ':') | |
832 | || (*name_cursor == '\'' && name_cursor[1])) | |
463ee0b2 | 833 | { |
463ee0b2 | 834 | if (!stash) |
3280af22 | 835 | stash = PL_defstash; |
dc437b57 | 836 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c | 837 | return NULL; |
463ee0b2 | 838 | |
b3d904f3 | 839 | len = name_cursor - name; |
85e6fe83 | 840 | if (len > 0) { |
0cea0058 | 841 | char smallbuf[128]; |
62b57502 | 842 | char *tmpbuf; |
62b57502 | 843 | |
798b63bc | 844 | if (len + 2 <= (I32)sizeof (smallbuf)) |
3c78fafa | 845 | tmpbuf = smallbuf; |
62b57502 | 846 | else |
2ae0db35 | 847 | Newx(tmpbuf, len+2, char); |
a0d0e21e LW |
848 | Copy(name, tmpbuf, len, char); |
849 | tmpbuf[len++] = ':'; | |
850 | tmpbuf[len++] = ':'; | |
463ee0b2 | 851 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
a0714e2c | 852 | gv = gvp ? *gvp : NULL; |
3280af22 | 853 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 | 854 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 | 855 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 GS |
856 | else |
857 | GvMULTI_on(gv); | |
858 | } | |
3c78fafa | 859 | if (tmpbuf != smallbuf) |
62b57502 | 860 | Safefree(tmpbuf); |
3280af22 | 861 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0714e2c | 862 | return NULL; |
85e6fe83 | 863 | |
463ee0b2 LW |
864 | if (!(stash = GvHV(gv))) |
865 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 866 | |
bfcb3514 | 867 | if (!HvNAME_get(stash)) |
b3d904f3 | 868 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); |
463ee0b2 LW |
869 | } |
870 | ||
b3d904f3 NC |
871 | if (*name_cursor == ':') |
872 | name_cursor++; | |
873 | name_cursor++; | |
874 | name = name_cursor; | |
ad6bfa9d | 875 | if (name == name_end) |
017a3ce5 | 876 | return gv ? gv : (GV*)*hv_fetchs(PL_defstash, "main::", TRUE); |
79072805 | 877 | } |
79072805 | 878 | } |
b3d904f3 | 879 | len = name_cursor - name; |
463ee0b2 LW |
880 | |
881 | /* No stash in name, so see how we can default */ | |
882 | ||
883 | if (!stash) { | |
fafc274c | 884 | no_stash: |
8ccce9ae | 885 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c | 886 | bool global = FALSE; |
887 | ||
8ccce9ae NC |
888 | switch (len) { |
889 | case 1: | |
18ea00d7 | 890 | if (*name == '_') |
9d116dd7 | 891 | global = TRUE; |
18ea00d7 | 892 | break; |
8ccce9ae NC |
893 | case 3: |
894 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
895 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
896 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
9d116dd7 | 897 | global = TRUE; |
18ea00d7 | 898 | break; |
8ccce9ae NC |
899 | case 4: |
900 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
901 | && name[3] == 'V') | |
9d116dd7 | 902 | global = TRUE; |
18ea00d7 | 903 | break; |
8ccce9ae NC |
904 | case 5: |
905 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
906 | && name[3] == 'I' && name[4] == 'N') | |
463ee0b2 | 907 | global = TRUE; |
18ea00d7 | 908 | break; |
8ccce9ae NC |
909 | case 6: |
910 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
911 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
912 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
913 | global = TRUE; | |
914 | break; | |
915 | case 7: | |
916 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
917 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
918 | && name[6] == 'T') | |
18ea00d7 NC |
919 | global = TRUE; |
920 | break; | |
463ee0b2 | 921 | } |
9607fc9c | 922 | |
463ee0b2 | 923 | if (global) |
3280af22 | 924 | stash = PL_defstash; |
923e4eb5 | 925 | else if (IN_PERL_COMPILETIME) { |
3280af22 NIS |
926 | stash = PL_curstash; |
927 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
748a9306 LW |
928 | sv_type != SVt_PVCV && |
929 | sv_type != SVt_PVGV && | |
4633a7c4 | 930 | sv_type != SVt_PVFM && |
c07a80fd | 931 | sv_type != SVt_PVIO && |
70ec6265 NC |
932 | !(len == 1 && sv_type == SVt_PV && |
933 | (*name == 'a' || *name == 'b')) ) | |
748a9306 | 934 | { |
4633a7c4 LW |
935 | gvp = (GV**)hv_fetch(stash,name,len,0); |
936 | if (!gvp || | |
3280af22 | 937 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 AD |
938 | SvTYPE(*gvp) != SVt_PVGV) |
939 | { | |
d4c19fe8 | 940 | stash = NULL; |
a5f75d66 | 941 | } |
155aba94 GS |
942 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
943 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
944 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
4633a7c4 | 945 | { |
cea2e8a9 | 946 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 LW |
947 | sv_type == SVt_PVAV ? '@' : |
948 | sv_type == SVt_PVHV ? '%' : '$', | |
949 | name); | |
8ebc5c01 | 950 | if (GvCVu(*gvp)) |
cc507455 | 951 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
d4c19fe8 | 952 | stash = NULL; |
4633a7c4 | 953 | } |
a0d0e21e | 954 | } |
85e6fe83 | 955 | } |
463ee0b2 | 956 | else |
1d7c1841 | 957 | stash = CopSTASH(PL_curcop); |
463ee0b2 LW |
958 | } |
959 | else | |
3280af22 | 960 | stash = PL_defstash; |
463ee0b2 LW |
961 | } |
962 | ||
963 | /* By this point we should have a stash and a name */ | |
964 | ||
a0d0e21e | 965 | if (!stash) { |
5a844595 | 966 | if (add) { |
9d4ba2ae | 967 | SV * const err = Perl_mess(aTHX_ |
5a844595 GS |
968 | "Global symbol \"%s%s\" requires explicit package name", |
969 | (sv_type == SVt_PV ? "$" | |
970 | : sv_type == SVt_PVAV ? "@" | |
971 | : sv_type == SVt_PVHV ? "%" | |
608b3986 | 972 | : ""), name); |
e7f343b6 | 973 | GV *gv; |
608b3986 AE |
974 | if (USE_UTF8_IN_NAMES) |
975 | SvUTF8_on(err); | |
976 | qerror(err); | |
e7f343b6 NC |
977 | gv = gv_fetchpvn_flags("<none>::", 8, GV_ADDMULTI, SVt_PVHV); |
978 | if(!gv) { | |
979 | /* symbol table under destruction */ | |
980 | return NULL; | |
981 | } | |
982 | stash = GvHV(gv); | |
a0d0e21e | 983 | } |
d7aacf4e | 984 | else |
a0714e2c | 985 | return NULL; |
a0d0e21e LW |
986 | } |
987 | ||
988 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
a0714e2c | 989 | return NULL; |
a0d0e21e | 990 | |
79072805 | 991 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 | 992 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
a0714e2c | 993 | return NULL; |
79072805 LW |
994 | gv = *gvp; |
995 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e | 996 | if (add) { |
a5f75d66 | 997 | GvMULTI_on(gv); |
a0d0e21e | 998 | gv_init_sv(gv, sv_type); |
44a2ac75 YO |
999 | if (sv_type == SVt_PVHV && len == 1 ) { |
1000 | if (*name == '!') | |
1001 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); | |
1002 | else | |
1003 | if (*name == '-' || *name == '+') | |
1004 | require_tie_mod(gv, name, newSVpvs("re::Tie::Hash::NamedCapture"), "FETCH", 0); | |
1005 | ||
1006 | } | |
a0d0e21e | 1007 | } |
79072805 | 1008 | return gv; |
add2581e | 1009 | } else if (no_init) { |
55d729e4 | 1010 | return gv; |
e26df76a NC |
1011 | } else if (no_expand && SvROK(gv)) { |
1012 | return gv; | |
79072805 | 1013 | } |
93a17b20 LW |
1014 | |
1015 | /* Adding a new symbol */ | |
1016 | ||
0453d815 | 1017 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d | 1018 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 | 1019 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e | 1020 | gv_init_sv(gv, sv_type); |
93a17b20 | 1021 | |
a0288114 | 1022 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d | 1023 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 PM |
1024 | GvMULTI_on(gv) ; |
1025 | ||
93a17b20 | 1026 | /* set up magic where warranted */ |
cc4c2da6 | 1027 | if (len > 1) { |
9431620d | 1028 | #ifndef EBCDIC |
cc4c2da6 | 1029 | if (*name > 'V' ) { |
6f207bd3 | 1030 | NOOP; |
cc4c2da6 | 1031 | /* Nothing else to do. |
91f565cb | 1032 | The compiler will probably turn the switch statement into a |
cc4c2da6 NC |
1033 | branch table. Make sure we avoid even that small overhead for |
1034 | the common case of lower case variable names. */ | |
9431620d NC |
1035 | } else |
1036 | #endif | |
1037 | { | |
b464bac0 | 1038 | const char * const name2 = name + 1; |
cc4c2da6 NC |
1039 | switch (*name) { |
1040 | case 'A': | |
1041 | if (strEQ(name2, "RGV")) { | |
1042 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
1043 | } | |
7b8203e3 YST |
1044 | else if (strEQ(name2, "RGVOUT")) { |
1045 | GvMULTI_on(gv); | |
1046 | } | |
cc4c2da6 NC |
1047 | break; |
1048 | case 'E': | |
1049 | if (strnEQ(name2, "XPORT", 5)) | |
1050 | GvMULTI_on(gv); | |
1051 | break; | |
1052 | case 'I': | |
1053 | if (strEQ(name2, "SA")) { | |
9d4ba2ae | 1054 | AV* const av = GvAVn(gv); |
cc4c2da6 | 1055 | GvMULTI_on(gv); |
bd61b366 | 1056 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, NULL, 0); |
cc4c2da6 NC |
1057 | /* NOTE: No support for tied ISA */ |
1058 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") | |
1059 | && AvFILLp(av) == -1) | |
1060 | { | |
e1ec3a88 | 1061 | const char *pname; |
cc4c2da6 | 1062 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
da51bb9b | 1063 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 | 1064 | av_push(av, newSVpvn(pname = "DB_File",7)); |
da51bb9b | 1065 | gv_stashpvn(pname, 7, GV_ADD); |
cc4c2da6 | 1066 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
da51bb9b | 1067 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 | 1068 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
da51bb9b | 1069 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 | 1070 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
da51bb9b | 1071 | gv_stashpvn(pname, 9, GV_ADD); |
cc4c2da6 NC |
1072 | } |
1073 | } | |
1074 | break; | |
1075 | case 'O': | |
1076 | if (strEQ(name2, "VERLOAD")) { | |
9d4ba2ae | 1077 | HV* const hv = GvHVn(gv); |
cc4c2da6 | 1078 | GvMULTI_on(gv); |
a0714e2c | 1079 | hv_magic(hv, NULL, PERL_MAGIC_overload); |
cc4c2da6 NC |
1080 | } |
1081 | break; | |
1082 | case 'S': | |
1083 | if (strEQ(name2, "IG")) { | |
1084 | HV *hv; | |
1085 | I32 i; | |
1086 | if (!PL_psig_ptr) { | |
a02a5408 JC |
1087 | Newxz(PL_psig_ptr, SIG_SIZE, SV*); |
1088 | Newxz(PL_psig_name, SIG_SIZE, SV*); | |
1089 | Newxz(PL_psig_pend, SIG_SIZE, int); | |
cc4c2da6 NC |
1090 | } |
1091 | GvMULTI_on(gv); | |
1092 | hv = GvHVn(gv); | |
a0714e2c | 1093 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 1094 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 1095 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
1096 | if (init) |
1097 | sv_setsv(*init, &PL_sv_undef); | |
1098 | PL_psig_ptr[i] = 0; | |
1099 | PL_psig_name[i] = 0; | |
1100 | PL_psig_pend[i] = 0; | |
1101 | } | |
1102 | } | |
1103 | break; | |
1104 | case 'V': | |
1105 | if (strEQ(name2, "ERSION")) | |
1106 | GvMULTI_on(gv); | |
1107 | break; | |
e5218da5 GA |
1108 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1109 | if (strEQ(name2, "HILD_ERROR_NATIVE")) | |
1110 | goto magicalize; | |
1111 | break; | |
cc4c2da6 NC |
1112 | case '\005': /* $^ENCODING */ |
1113 | if (strEQ(name2, "NCODING")) | |
1114 | goto magicalize; | |
1115 | break; | |
cde0cee5 YO |
1116 | case '\015': /* $^MATCH */ |
1117 | if (strEQ(name2, "ATCH")) | |
1118 | goto ro_magicalize; | |
cc4c2da6 NC |
1119 | case '\017': /* $^OPEN */ |
1120 | if (strEQ(name2, "PEN")) | |
1121 | goto magicalize; | |
1122 | break; | |
cde0cee5 YO |
1123 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
1124 | if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH")) | |
1125 | goto ro_magicalize; | |
cc4c2da6 NC |
1126 | case '\024': /* ${^TAINT} */ |
1127 | if (strEQ(name2, "AINT")) | |
1128 | goto ro_magicalize; | |
1129 | break; | |
7cebcbc0 | 1130 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 | 1131 | if (strEQ(name2, "NICODE")) |
cc4c2da6 | 1132 | goto ro_magicalize; |
a0288114 | 1133 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 | 1134 | goto ro_magicalize; |
e07ea26a NC |
1135 | if (strEQ(name2, "TF8CACHE")) |
1136 | goto magicalize; | |
cc4c2da6 NC |
1137 | break; |
1138 | case '\027': /* $^WARNING_BITS */ | |
1139 | if (strEQ(name2, "ARNING_BITS")) | |
1140 | goto magicalize; | |
1141 | break; | |
1142 | case '1': | |
1143 | case '2': | |
1144 | case '3': | |
1145 | case '4': | |
1146 | case '5': | |
1147 | case '6': | |
1148 | case '7': | |
1149 | case '8': | |
1150 | case '9': | |
85e6fe83 | 1151 | { |
cc4c2da6 NC |
1152 | /* ensures variable is only digits */ |
1153 | /* ${"1foo"} fails this test (and is thus writeable) */ | |
1154 | /* added by japhy, but borrowed from is_gv_magical */ | |
1155 | const char *end = name + len; | |
1156 | while (--end > name) { | |
1157 | if (!isDIGIT(*end)) return gv; | |
1158 | } | |
1159 | goto ro_magicalize; | |
1d7c1841 | 1160 | } |
dc437b57 | 1161 | } |
93a17b20 | 1162 | } |
392db708 NC |
1163 | } else { |
1164 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
1165 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 NC |
1166 | switch (*name) { |
1167 | case '&': | |
1168 | case '`': | |
1169 | case '\'': | |
1170 | if ( | |
1171 | sv_type == SVt_PVAV || | |
1172 | sv_type == SVt_PVHV || | |
1173 | sv_type == SVt_PVCV || | |
1174 | sv_type == SVt_PVFM || | |
1175 | sv_type == SVt_PVIO | |
1176 | ) { break; } | |
1177 | PL_sawampersand = TRUE; | |
1178 | goto ro_magicalize; | |
1179 | ||
1180 | case ':': | |
c69033f2 | 1181 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
1182 | goto magicalize; |
1183 | ||
1184 | case '?': | |
ff0cee69 | 1185 | #ifdef COMPLEX_STATUS |
c69033f2 | 1186 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 1187 | #endif |
cc4c2da6 | 1188 | goto magicalize; |
ff0cee69 | 1189 | |
cc4c2da6 | 1190 | case '!': |
44a2ac75 YO |
1191 | GvMULTI_on(gv); |
1192 | /* If %! has been used, automatically load Errno.pm. */ | |
d2c93421 | 1193 | |
c69033f2 | 1194 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 | 1195 | |
44a2ac75 | 1196 | /* magicalization must be done before require_tie_mod is called */ |
cc4c2da6 | 1197 | if (sv_type == SVt_PVHV) |
44a2ac75 | 1198 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
d2c93421 | 1199 | |
6cef1e77 | 1200 | break; |
cc4c2da6 | 1201 | case '-': |
44a2ac75 YO |
1202 | case '+': |
1203 | GvMULTI_on(gv); /* no used once warnings here */ | |
1204 | { | |
1205 | bool plus = (*name == '+'); | |
1206 | SV *stashname = newSVpvs("re::Tie::Hash::NamedCapture"); | |
1207 | AV* const av = GvAVn(gv); | |
1208 | HV *const hv = GvHVn(gv); | |
1209 | HV *const hv_tie = newHV(); | |
1210 | SV *tie = newRV_noinc((SV*)hv_tie); | |
1211 | ||
da51bb9b | 1212 | sv_bless(tie, gv_stashsv(stashname,GV_ADD)); |
44a2ac75 YO |
1213 | hv_magic(hv, (GV*)tie, PERL_MAGIC_tied); |
1214 | sv_magic((SV*)av, (plus ? (SV*)av : NULL), PERL_MAGIC_regdata, NULL, 0); | |
1215 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); | |
1216 | ||
1217 | if (plus) | |
1218 | SvREADONLY_on(GvSVn(gv)); | |
1219 | else | |
1220 | Perl_hv_store(aTHX_ hv_tie, STR_WITH_LEN("all"), newSViv(1), 0); | |
1221 | ||
1222 | SvREADONLY_on(hv); | |
1223 | SvREADONLY_on(tie); | |
1224 | SvREADONLY_on(av); | |
1225 | ||
1226 | if (sv_type == SVt_PVHV) | |
1227 | require_tie_mod(gv, name, stashname, "FETCH", 0); | |
1228 | ||
1229 | break; | |
cc4c2da6 NC |
1230 | } |
1231 | case '*': | |
cc4c2da6 NC |
1232 | case '#': |
1233 | if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) | |
1234 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), | |
8ae1fe26 RGS |
1235 | "$%c is no longer supported", *name); |
1236 | break; | |
cc4c2da6 | 1237 | case '|': |
c69033f2 | 1238 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 NC |
1239 | goto magicalize; |
1240 | ||
b3ca2e83 NC |
1241 | case '\010': /* $^H */ |
1242 | { | |
1243 | HV *const hv = GvHVn(gv); | |
1244 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
1245 | } | |
1246 | goto magicalize; | |
cc4c2da6 NC |
1247 | case '\023': /* $^S */ |
1248 | case '1': | |
1249 | case '2': | |
1250 | case '3': | |
1251 | case '4': | |
1252 | case '5': | |
1253 | case '6': | |
1254 | case '7': | |
1255 | case '8': | |
1256 | case '9': | |
1257 | ro_magicalize: | |
c69033f2 | 1258 | SvREADONLY_on(GvSVn(gv)); |
cc4c2da6 NC |
1259 | /* FALL THROUGH */ |
1260 | case '[': | |
1261 | case '^': | |
1262 | case '~': | |
1263 | case '=': | |
1264 | case '%': | |
1265 | case '.': | |
1266 | case '(': | |
1267 | case ')': | |
1268 | case '<': | |
1269 | case '>': | |
1270 | case ',': | |
1271 | case '\\': | |
1272 | case '/': | |
1273 | case '\001': /* $^A */ | |
1274 | case '\003': /* $^C */ | |
1275 | case '\004': /* $^D */ | |
1276 | case '\005': /* $^E */ | |
1277 | case '\006': /* $^F */ | |
cc4c2da6 NC |
1278 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1279 | case '\016': /* $^N */ | |
1280 | case '\017': /* $^O */ | |
1281 | case '\020': /* $^P */ | |
1282 | case '\024': /* $^T */ | |
1283 | case '\027': /* $^W */ | |
1284 | magicalize: | |
c69033f2 | 1285 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
cc4c2da6 | 1286 | break; |
e521374c | 1287 | |
cc4c2da6 | 1288 | case '\014': /* $^L */ |
c69033f2 NC |
1289 | sv_setpvn(GvSVn(gv),"\f",1); |
1290 | PL_formfeed = GvSVn(gv); | |
463ee0b2 | 1291 | break; |
cc4c2da6 | 1292 | case ';': |
c69033f2 | 1293 | sv_setpvn(GvSVn(gv),"\034",1); |
463ee0b2 | 1294 | break; |
cc4c2da6 NC |
1295 | case ']': |
1296 | { | |
c69033f2 | 1297 | SV * const sv = GvSVn(gv); |
d7aa5382 | 1298 | if (!sv_derived_from(PL_patchlevel, "version")) |
7a5b473e | 1299 | upg_version(PL_patchlevel); |
7d54d38e SH |
1300 | GvSV(gv) = vnumify(PL_patchlevel); |
1301 | SvREADONLY_on(GvSV(gv)); | |
1302 | SvREFCNT_dec(sv); | |
93a17b20 LW |
1303 | } |
1304 | break; | |
cc4c2da6 NC |
1305 | case '\026': /* $^V */ |
1306 | { | |
c69033f2 | 1307 | SV * const sv = GvSVn(gv); |
f9be5ac8 DM |
1308 | GvSV(gv) = new_version(PL_patchlevel); |
1309 | SvREADONLY_on(GvSV(gv)); | |
1310 | SvREFCNT_dec(sv); | |
16070b82 GS |
1311 | } |
1312 | break; | |
cc4c2da6 | 1313 | } |
79072805 | 1314 | } |
93a17b20 | 1315 | return gv; |
79072805 LW |
1316 | } |
1317 | ||
1318 | void | |
35a4481c | 1319 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1320 | { |
35a4481c | 1321 | const char *name; |
7423f6db | 1322 | STRLEN namelen; |
35a4481c | 1323 | const HV * const hv = GvSTASH(gv); |
43693395 | 1324 | if (!hv) { |
0c34ef67 | 1325 | SvOK_off(sv); |
43693395 GS |
1326 | return; |
1327 | } | |
666ea192 | 1328 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 1329 | |
bfcb3514 | 1330 | name = HvNAME_get(hv); |
7423f6db NC |
1331 | if (name) { |
1332 | namelen = HvNAMELEN_get(hv); | |
1333 | } else { | |
e27ad1f2 | 1334 | name = "__ANON__"; |
7423f6db NC |
1335 | namelen = 8; |
1336 | } | |
a0288114 | 1337 | |
e27ad1f2 | 1338 | if (keepmain || strNE(name, "main")) { |
7423f6db | 1339 | sv_catpvn(sv,name,namelen); |
396482e1 | 1340 | sv_catpvs(sv,"::"); |
43693395 | 1341 | } |
257984c0 | 1342 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 GS |
1343 | } |
1344 | ||
1345 | void | |
35a4481c | 1346 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1347 | { |
46c461b5 AL |
1348 | const GV * const egv = GvEGV(gv); |
1349 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); | |
43693395 GS |
1350 | } |
1351 | ||
79072805 | 1352 | IO * |
864dbfa3 | 1353 | Perl_newIO(pTHX) |
79072805 | 1354 | { |
97aff369 | 1355 | dVAR; |
8990e307 | 1356 | GV *iogv; |
b9f83d2f | 1357 | IO * const io = (IO*)newSV_type(SVt_PVIO); |
158623e7 NC |
1358 | /* This used to read SvREFCNT(io) = 1; |
1359 | It's not clear why the reference count needed an explicit reset. NWC | |
1360 | */ | |
1361 | assert (SvREFCNT(io) == 1); | |
8990e307 | 1362 | SvOBJECT_on(io); |
b464bac0 | 1363 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 | 1364 | hv_clear(PL_stashcache); |
71315bf2 | 1365 | iogv = gv_fetchpvs("FileHandle::", 0, SVt_PVHV); |
5f2d631d GS |
1366 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1367 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) | |
71315bf2 | 1368 | iogv = gv_fetchpvs("IO::Handle::", GV_ADD, SVt_PVHV); |
b162af07 | 1369 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 LW |
1370 | return io; |
1371 | } | |
1372 | ||
1373 | void | |
1146e912 | 1374 | Perl_gv_check(pTHX_ const HV *stash) |
79072805 | 1375 | { |
97aff369 | 1376 | dVAR; |
79072805 | 1377 | register I32 i; |
463ee0b2 | 1378 | |
8990e307 LW |
1379 | if (!HvARRAY(stash)) |
1380 | return; | |
a0d0e21e | 1381 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 1382 | const HE *entry; |
dc437b57 | 1383 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 AL |
1384 | register GV *gv; |
1385 | HV *hv; | |
dc437b57 | 1386 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f | 1387 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 1388 | { |
19b6c847 | 1389 | if (hv != PL_defstash && hv != stash) |
a0d0e21e LW |
1390 | gv_check(hv); /* nested package */ |
1391 | } | |
dc437b57 | 1392 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 | 1393 | const char *file; |
dc437b57 | 1394 | gv = (GV*)HeVAL(entry); |
55d729e4 | 1395 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 1396 | continue; |
1d7c1841 GS |
1397 | file = GvFILE(gv); |
1398 | /* performance hack: if filename is absolute and it's a standard | |
1399 | * module, don't bother warning */ | |
6eb630b7 | 1400 | #ifdef MACOS_TRADITIONAL |
551405c4 | 1401 | # define LIB_COMPONENT ":lib:" |
6eb630b7 | 1402 | #else |
551405c4 | 1403 | # define LIB_COMPONENT "/lib/" |
6eb630b7 | 1404 | #endif |
551405c4 AL |
1405 | if (file |
1406 | && PERL_FILE_IS_ABSOLUTE(file) | |
1407 | && (instr(file, LIB_COMPONENT) || instr(file, ".pm"))) | |
1d7c1841 | 1408 | { |
8990e307 | 1409 | continue; |
1d7c1841 GS |
1410 | } |
1411 | CopLINE_set(PL_curcop, GvLINE(gv)); | |
1412 | #ifdef USE_ITHREADS | |
dd374669 | 1413 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 GS |
1414 | #else |
1415 | CopFILEGV(PL_curcop) = gv_fetchfile(file); | |
1416 | #endif | |
9014280d | 1417 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 | 1418 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 | 1419 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 | 1420 | } |
79072805 LW |
1421 | } |
1422 | } | |
1423 | } | |
1424 | ||
1425 | GV * | |
e1ec3a88 | 1426 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 | 1427 | { |
97aff369 | 1428 | dVAR; |
cea2e8a9 | 1429 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 | 1430 | GV_ADD, SVt_PVGV); |
79072805 LW |
1431 | } |
1432 | ||
1433 | /* hopefully this is only called on local symbol table entries */ | |
1434 | ||
1435 | GP* | |
864dbfa3 | 1436 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 1437 | { |
97aff369 | 1438 | dVAR; |
1d7c1841 | 1439 | if (!gp) |
d4c19fe8 | 1440 | return NULL; |
79072805 | 1441 | gp->gp_refcnt++; |
44a8e56a | 1442 | if (gp->gp_cv) { |
1443 | if (gp->gp_cvgen) { | |
1444 | /* multi-named GPs cannot be used for method cache */ | |
1445 | SvREFCNT_dec(gp->gp_cv); | |
601f1833 | 1446 | gp->gp_cv = NULL; |
44a8e56a | 1447 | gp->gp_cvgen = 0; |
1448 | } | |
1449 | else { | |
1450 | /* Adding a new name to a subroutine invalidates method cache */ | |
3280af22 | 1451 | PL_sub_generation++; |
44a8e56a | 1452 | } |
1453 | } | |
79072805 | 1454 | return gp; |
79072805 LW |
1455 | } |
1456 | ||
1457 | void | |
864dbfa3 | 1458 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 1459 | { |
97aff369 | 1460 | dVAR; |
79072805 LW |
1461 | GP* gp; |
1462 | ||
f7877b28 | 1463 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 1464 | return; |
f248d071 GS |
1465 | if (gp->gp_refcnt == 0) { |
1466 | if (ckWARN_d(WARN_INTERNAL)) | |
9014280d | 1467 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc SB |
1468 | "Attempt to free unreferenced glob pointers" |
1469 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
1470 | return; |
1471 | } | |
44a8e56a | 1472 | if (gp->gp_cv) { |
1473 | /* Deleting the name of a subroutine invalidates method cache */ | |
3280af22 | 1474 | PL_sub_generation++; |
44a8e56a | 1475 | } |
748a9306 LW |
1476 | if (--gp->gp_refcnt > 0) { |
1477 | if (gp->gp_egv == gv) | |
1478 | gp->gp_egv = 0; | |
dd38834b | 1479 | GvGP(gv) = 0; |
79072805 | 1480 | return; |
748a9306 | 1481 | } |
79072805 | 1482 | |
c9ce39a9 RGS |
1483 | if (gp->gp_file_hek) |
1484 | unshare_hek(gp->gp_file_hek); | |
c9da69fb AL |
1485 | SvREFCNT_dec(gp->gp_sv); |
1486 | SvREFCNT_dec(gp->gp_av); | |
bfcb3514 NC |
1487 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1488 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
1489 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { | |
bfcb3514 NC |
1490 | const char *hvname = HvNAME_get(gp->gp_hv); |
1491 | if (PL_stashcache && hvname) | |
7423f6db NC |
1492 | hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
1493 | G_DISCARD); | |
bfcb3514 | 1494 | SvREFCNT_dec(gp->gp_hv); |
13207a71 | 1495 | } |
c9da69fb AL |
1496 | SvREFCNT_dec(gp->gp_io); |
1497 | SvREFCNT_dec(gp->gp_cv); | |
1498 | SvREFCNT_dec(gp->gp_form); | |
748a9306 | 1499 | |
79072805 LW |
1500 | Safefree(gp); |
1501 | GvGP(gv) = 0; | |
1502 | } | |
1503 | ||
d460ef45 NIS |
1504 | int |
1505 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
1506 | { | |
53c1dcc0 AL |
1507 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1508 | PERL_UNUSED_ARG(sv); | |
dd374669 | 1509 | |
d460ef45 NIS |
1510 | if (amtp && AMT_AMAGIC(amtp)) { |
1511 | int i; | |
1512 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 1513 | CV * const cv = amtp->table[i]; |
b37c2d43 | 1514 | if (cv) { |
d460ef45 | 1515 | SvREFCNT_dec((SV *) cv); |
601f1833 | 1516 | amtp->table[i] = NULL; |
d460ef45 NIS |
1517 | } |
1518 | } | |
1519 | } | |
1520 | return 0; | |
1521 | } | |
1522 | ||
a0d0e21e LW |
1523 | /* Updates and caches the CV's */ |
1524 | ||
1525 | bool | |
864dbfa3 | 1526 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e | 1527 | { |
97aff369 | 1528 | dVAR; |
53c1dcc0 | 1529 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
a6006777 | 1530 | AMT amt; |
a0d0e21e | 1531 | |
14899595 NC |
1532 | if (mg) { |
1533 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
1534 | if (amtp->was_ok_am == PL_amagic_generation | |
1535 | && amtp->was_ok_sub == PL_sub_generation) { | |
1536 | return (bool)AMT_OVERLOADED(amtp); | |
1537 | } | |
1538 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); | |
1539 | } | |
a0d0e21e | 1540 | |
bfcb3514 | 1541 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 1542 | |
d460ef45 | 1543 | Zero(&amt,1,AMT); |
3280af22 NIS |
1544 | amt.was_ok_am = PL_amagic_generation; |
1545 | amt.was_ok_sub = PL_sub_generation; | |
a6006777 | 1546 | amt.fallback = AMGfallNO; |
1547 | amt.flags = 0; | |
1548 | ||
a6006777 | 1549 | { |
32251b26 IZ |
1550 | int filled = 0, have_ovl = 0; |
1551 | int i, lim = 1; | |
a6006777 | 1552 | |
22c35a8c | 1553 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 1554 | |
89ffc314 | 1555 | /* Try to find via inheritance. */ |
53c1dcc0 AL |
1556 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1557 | SV * const sv = gv ? GvSV(gv) : NULL; | |
1558 | CV* cv; | |
89ffc314 IZ |
1559 | |
1560 | if (!gv) | |
32251b26 | 1561 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 NC |
1562 | #ifdef PERL_DONT_CREATE_GVSV |
1563 | else if (!sv) { | |
6f207bd3 | 1564 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 NC |
1565 | } |
1566 | #endif | |
89ffc314 IZ |
1567 | else if (SvTRUE(sv)) |
1568 | amt.fallback=AMGfallYES; | |
1569 | else if (SvOK(sv)) | |
1570 | amt.fallback=AMGfallNEVER; | |
a6006777 | 1571 | |
32251b26 | 1572 | for (i = 1; i < lim; i++) |
601f1833 | 1573 | amt.table[i] = NULL; |
32251b26 | 1574 | for (; i < NofAMmeth; i++) { |
6136c704 | 1575 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 1576 | /* Human-readable form, for debugging: */ |
6136c704 | 1577 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
e1ec3a88 | 1578 | const STRLEN l = strlen(cooky); |
89ffc314 | 1579 | |
a0288114 | 1580 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 1581 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
1582 | /* don't fill the cache while looking up! |
1583 | Creation of inheritance stubs in intermediate packages may | |
1584 | conflict with the logic of runtime method substitution. | |
1585 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
1586 | then we could have created stubs for "(+0" in A and C too. | |
1587 | But if B overloads "bool", we may want to use it for | |
1588 | numifying instead of C's "+0". */ | |
1589 | if (i >= DESTROY_amg) | |
1590 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); | |
1591 | else /* Autoload taken care of below */ | |
1592 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); | |
46fc3d4c | 1593 | cv = 0; |
89ffc314 | 1594 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 | 1595 | const char *hvname; |
44a8e56a | 1596 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 | 1597 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 IZ |
1598 | /* This is a hack to support autoloading..., while |
1599 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 1600 | /* GvSV contains the name of the method. */ |
6136c704 | 1601 | GV *ngv = NULL; |
c69033f2 | 1602 | SV *gvsv = GvSV(gv); |
a0288114 AL |
1603 | |
1604 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
1605 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
ca0270c4 | 1606 | (void*)GvSV(gv), cp, hvname) ); |
c69033f2 NC |
1607 | if (!gvsv || !SvPOK(gvsv) |
1608 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), | |
dc848c6f | 1609 | FALSE))) |
1610 | { | |
a0288114 | 1611 | /* Can be an import stub (created by "can"). */ |
666ea192 | 1612 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
a0288114 AL |
1613 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1614 | "in package \"%.256s\"", | |
35c1215d NC |
1615 | (GvCVGEN(gv) ? "Stub found while resolving" |
1616 | : "Can't resolve"), | |
bfcb3514 | 1617 | name, cp, hvname); |
44a8e56a | 1618 | } |
dc848c6f | 1619 | cv = GvCV(gv = ngv); |
44a8e56a | 1620 | } |
b464bac0 | 1621 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 1622 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 1623 | GvNAME(CvGV(cv))) ); |
1624 | filled = 1; | |
32251b26 IZ |
1625 | if (i < DESTROY_amg) |
1626 | have_ovl = 1; | |
611c1e95 IZ |
1627 | } else if (gv) { /* Autoloaded... */ |
1628 | cv = (CV*)gv; | |
1629 | filled = 1; | |
44a8e56a | 1630 | } |
b37c2d43 | 1631 | amt.table[i]=(CV*)SvREFCNT_inc_simple(cv); |
a0d0e21e | 1632 | } |
a0d0e21e | 1633 | if (filled) { |
a6006777 | 1634 | AMT_AMAGIC_on(&amt); |
32251b26 IZ |
1635 | if (have_ovl) |
1636 | AMT_OVERLOADED_on(&amt); | |
14befaf4 DM |
1637 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1638 | (char*)&amt, sizeof(AMT)); | |
32251b26 | 1639 | return have_ovl; |
a0d0e21e LW |
1640 | } |
1641 | } | |
a6006777 | 1642 | /* Here we have no table: */ |
9cbac4c7 | 1643 | /* no_table: */ |
a6006777 | 1644 | AMT_AMAGIC_off(&amt); |
14befaf4 DM |
1645 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1646 | (char*)&amt, sizeof(AMTS)); | |
a0d0e21e LW |
1647 | return FALSE; |
1648 | } | |
1649 | ||
32251b26 IZ |
1650 | |
1651 | CV* | |
1652 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
1653 | { | |
97aff369 | 1654 | dVAR; |
3f8f4626 | 1655 | MAGIC *mg; |
32251b26 IZ |
1656 | AMT *amtp; |
1657 | ||
bfcb3514 | 1658 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 1659 | return NULL; |
14befaf4 | 1660 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
1661 | if (!mg) { |
1662 | do_update: | |
1663 | Gv_AMupdate(stash); | |
14befaf4 | 1664 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 | 1665 | } |
a9fd4e40 | 1666 | assert(mg); |
32251b26 IZ |
1667 | amtp = (AMT*)mg->mg_ptr; |
1668 | if ( amtp->was_ok_am != PL_amagic_generation | |
1669 | || amtp->was_ok_sub != PL_sub_generation ) | |
1670 | goto do_update; | |
3ad83ce7 | 1671 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 1672 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
1673 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1674 | /* Passing it through may have resulted in a warning | |
1675 | "Inherited AUTOLOAD for a non-method deprecated", since | |
1676 | our caller is going through a function call, not a method call. | |
1677 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 1678 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
1679 | |
1680 | if (gv && GvCV(gv)) | |
1681 | return GvCV(gv); | |
1682 | } | |
1683 | return ret; | |
1684 | } | |
a0288114 | 1685 | |
601f1833 | 1686 | return NULL; |
32251b26 IZ |
1687 | } |
1688 | ||
1689 | ||
a0d0e21e | 1690 | SV* |
864dbfa3 | 1691 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 1692 | { |
27da23d5 | 1693 | dVAR; |
b267980d | 1694 | MAGIC *mg; |
9c5ffd7c | 1695 | CV *cv=NULL; |
a0d0e21e | 1696 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 1697 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
1698 | int off = 0, off1, lr = 0, notfound = 0; |
1699 | int postpr = 0, force_cpy = 0; | |
1700 | int assign = AMGf_assign & flags; | |
1701 | const int assignshift = assign ? 1 : 0; | |
497b47a8 JH |
1702 | #ifdef DEBUGGING |
1703 | int fl=0; | |
497b47a8 | 1704 | #endif |
25716404 | 1705 | HV* stash=NULL; |
a0d0e21e | 1706 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 GS |
1707 | && (stash = SvSTASH(SvRV(left))) |
1708 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1709 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1710 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 1711 | : NULL)) |
b267980d | 1712 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
1713 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1714 | * usual method */ | |
497b47a8 JH |
1715 | ( |
1716 | #ifdef DEBUGGING | |
1717 | fl = 1, | |
a0288114 | 1718 | #endif |
497b47a8 | 1719 | cv = cvp[off=method])))) { |
a0d0e21e LW |
1720 | lr = -1; /* Call method for left argument */ |
1721 | } else { | |
1722 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
1723 | int logic; | |
1724 | ||
1725 | /* look for substituted methods */ | |
ee239bfe | 1726 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
1727 | switch (method) { |
1728 | case inc_amg: | |
ee239bfe IZ |
1729 | force_cpy = 1; |
1730 | if ((cv = cvp[off=add_ass_amg]) | |
1731 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 1732 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1733 | } |
1734 | break; | |
1735 | case dec_amg: | |
ee239bfe IZ |
1736 | force_cpy = 1; |
1737 | if ((cv = cvp[off = subtr_ass_amg]) | |
1738 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 1739 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1740 | } |
1741 | break; | |
1742 | case bool__amg: | |
1743 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
1744 | break; | |
1745 | case numer_amg: | |
1746 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
1747 | break; | |
1748 | case string_amg: | |
1749 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
1750 | break; | |
b7787f18 AL |
1751 | case not_amg: |
1752 | (void)((cv = cvp[off=bool__amg]) | |
1753 | || (cv = cvp[off=numer_amg]) | |
1754 | || (cv = cvp[off=string_amg])); | |
1755 | postpr = 1; | |
1756 | break; | |
748a9306 LW |
1757 | case copy_amg: |
1758 | { | |
76e3520e GS |
1759 | /* |
1760 | * SV* ref causes confusion with the interpreter variable of | |
1761 | * the same name | |
1762 | */ | |
890ce7af | 1763 | SV* const tmpRef=SvRV(left); |
76e3520e | 1764 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 1765 | /* |
1766 | * Just to be extra cautious. Maybe in some | |
1767 | * additional cases sv_setsv is safe, too. | |
1768 | */ | |
890ce7af | 1769 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 1770 | SvOBJECT_on(newref); |
96d4b0ee NC |
1771 | /* As a bit of a source compatibility hack, SvAMAGIC() and |
1772 | friends dereference an RV, to behave the same was as when | |
1773 | overloading was stored on the reference, not the referant. | |
1774 | Hence we can't use SvAMAGIC_on() | |
1775 | */ | |
1776 | SvFLAGS(newref) |= SVf_AMAGIC; | |
b162af07 | 1777 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 LW |
1778 | return newref; |
1779 | } | |
1780 | } | |
1781 | break; | |
a0d0e21e | 1782 | case abs_amg: |
b267980d | 1783 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 1784 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 1785 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 1786 | if (off1==lt_amg) { |
890ce7af | 1787 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1788 | lt_amg,AMGf_noright); |
1789 | logic = SvTRUE(lessp); | |
1790 | } else { | |
890ce7af | 1791 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1792 | ncmp_amg,AMGf_noright); |
1793 | logic = (SvNV(lessp) < 0); | |
1794 | } | |
1795 | if (logic) { | |
1796 | if (off==subtr_amg) { | |
1797 | right = left; | |
748a9306 | 1798 | left = nullsv; |
a0d0e21e LW |
1799 | lr = 1; |
1800 | } | |
1801 | } else { | |
1802 | return left; | |
1803 | } | |
1804 | } | |
1805 | break; | |
1806 | case neg_amg: | |
155aba94 | 1807 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
1808 | right = left; |
1809 | left = sv_2mortal(newSViv(0)); | |
1810 | lr = 1; | |
1811 | } | |
1812 | break; | |
f216259d | 1813 | case int_amg: |
f5284f61 | 1814 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d NIS |
1815 | /* FAIL safe */ |
1816 | return NULL; /* Delegate operation to standard mechanisms. */ | |
1817 | break; | |
f5284f61 IZ |
1818 | case to_sv_amg: |
1819 | case to_av_amg: | |
1820 | case to_hv_amg: | |
1821 | case to_gv_amg: | |
1822 | case to_cv_amg: | |
1823 | /* FAIL safe */ | |
b267980d | 1824 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 | 1825 | break; |
a0d0e21e LW |
1826 | default: |
1827 | goto not_found; | |
1828 | } | |
1829 | if (!cv) goto not_found; | |
1830 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
25716404 GS |
1831 | && (stash = SvSTASH(SvRV(right))) |
1832 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1833 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1834 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 1835 | : NULL)) |
a0d0e21e LW |
1836 | && (cv = cvp[off=method])) { /* Method for right |
1837 | * argument found */ | |
1838 | lr=1; | |
b267980d NIS |
1839 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1840 | && (cvp=ocvp) && (lr = -1)) | |
a0d0e21e LW |
1841 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1842 | && !(flags & AMGf_unary)) { | |
1843 | /* We look for substitution for | |
1844 | * comparison operations and | |
fc36a67e | 1845 | * concatenation */ |
a0d0e21e LW |
1846 | if (method==concat_amg || method==concat_ass_amg |
1847 | || method==repeat_amg || method==repeat_ass_amg) { | |
1848 | return NULL; /* Delegate operation to string conversion */ | |
1849 | } | |
1850 | off = -1; | |
1851 | switch (method) { | |
1852 | case lt_amg: | |
1853 | case le_amg: | |
1854 | case gt_amg: | |
1855 | case ge_amg: | |
1856 | case eq_amg: | |
1857 | case ne_amg: | |
1858 | postpr = 1; off=ncmp_amg; break; | |
1859 | case slt_amg: | |
1860 | case sle_amg: | |
1861 | case sgt_amg: | |
1862 | case sge_amg: | |
1863 | case seq_amg: | |
1864 | case sne_amg: | |
1865 | postpr = 1; off=scmp_amg; break; | |
1866 | } | |
1867 | if (off != -1) cv = cvp[off]; | |
1868 | if (!cv) { | |
1869 | goto not_found; | |
1870 | } | |
1871 | } else { | |
a6006777 | 1872 | not_found: /* No method found, either report or croak */ |
b267980d | 1873 | switch (method) { |
d11ee47c RD |
1874 | case lt_amg: |
1875 | case le_amg: | |
1876 | case gt_amg: | |
1877 | case ge_amg: | |
1878 | case eq_amg: | |
1879 | case ne_amg: | |
1880 | case slt_amg: | |
1881 | case sle_amg: | |
1882 | case sgt_amg: | |
1883 | case sge_amg: | |
1884 | case seq_amg: | |
1885 | case sne_amg: | |
1886 | postpr = 0; break; | |
b267980d NIS |
1887 | case to_sv_amg: |
1888 | case to_av_amg: | |
1889 | case to_hv_amg: | |
1890 | case to_gv_amg: | |
1891 | case to_cv_amg: | |
1892 | /* FAIL safe */ | |
1893 | return left; /* Delegate operation to standard mechanisms. */ | |
1894 | break; | |
1895 | } | |
a0d0e21e LW |
1896 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1897 | notfound = 1; lr = -1; | |
1898 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
1899 | notfound = 1; lr = 1; | |
4cc0ca18 NC |
1900 | } else if ((amtp && amtp->fallback >= AMGfallYES) && !DEBUG_o_TEST) { |
1901 | /* Skip generating the "no method found" message. */ | |
1902 | return NULL; | |
a0d0e21e | 1903 | } else { |
46fc3d4c | 1904 | SV *msg; |
774d564b | 1905 | if (off==-1) off=method; |
b267980d | 1906 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 | 1907 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 | 1908 | AMG_id2name(method + assignshift), |
e7ea3e70 | 1909 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d | 1910 | SvAMAGIC(left)? |
a0d0e21e LW |
1911 | "in overloaded package ": |
1912 | "has no overloaded magic", | |
b267980d | 1913 | SvAMAGIC(left)? |
bfcb3514 | 1914 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e | 1915 | "", |
b267980d | 1916 | SvAMAGIC(right)? |
e7ea3e70 | 1917 | ",\n\tright argument in overloaded package ": |
b267980d | 1918 | (flags & AMGf_unary |
e7ea3e70 IZ |
1919 | ? "" |
1920 | : ",\n\tright argument has no overloaded magic"), | |
b267980d | 1921 | SvAMAGIC(right)? |
bfcb3514 | 1922 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c | 1923 | "")); |
a0d0e21e | 1924 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 | 1925 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e | 1926 | } else { |
be2597df | 1927 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e LW |
1928 | } |
1929 | return NULL; | |
1930 | } | |
ee239bfe | 1931 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
1932 | } |
1933 | } | |
497b47a8 | 1934 | #ifdef DEBUGGING |
a0d0e21e | 1935 | if (!notfound) { |
497b47a8 | 1936 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 | 1937 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 JH |
1938 | AMG_id2name(off), |
1939 | method+assignshift==off? "" : | |
a0288114 | 1940 | " (initially \"", |
497b47a8 JH |
1941 | method+assignshift==off? "" : |
1942 | AMG_id2name(method+assignshift), | |
a0288114 | 1943 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
1944 | flags & AMGf_unary? "" : |
1945 | lr==1 ? " for right argument": " for left argument", | |
1946 | flags & AMGf_unary? " for argument" : "", | |
bfcb3514 | 1947 | stash ? HvNAME_get(stash) : "null", |
497b47a8 | 1948 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 1949 | } |
497b47a8 | 1950 | #endif |
748a9306 LW |
1951 | /* Since we use shallow copy during assignment, we need |
1952 | * to dublicate the contents, probably calling user-supplied | |
1953 | * version of copy operator | |
1954 | */ | |
ee239bfe IZ |
1955 | /* We need to copy in following cases: |
1956 | * a) Assignment form was called. | |
1957 | * assignshift==1, assign==T, method + 1 == off | |
1958 | * b) Increment or decrement, called directly. | |
1959 | * assignshift==0, assign==0, method + 0 == off | |
1960 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 1961 | * assignshift==0, assign==T, |
ee239bfe IZ |
1962 | * force_cpy == T |
1963 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 1964 | * assignshift==0, assign==0, |
ee239bfe IZ |
1965 | * force_cpy == T |
1966 | * e) Assignment form translated to nomethod. | |
1967 | * assignshift==1, assign==T, method + 1 != off | |
1968 | * force_cpy == T | |
1969 | */ | |
1970 | /* off is method, method+assignshift, or a result of opcode substitution. | |
1971 | * In the latter case assignshift==0, so only notfound case is important. | |
1972 | */ | |
1973 | if (( (method + assignshift == off) | |
1974 | && (assign || (method == inc_amg) || (method == dec_amg))) | |
1975 | || force_cpy) | |
1976 | RvDEEPCP(left); | |
a0d0e21e LW |
1977 | { |
1978 | dSP; | |
1979 | BINOP myop; | |
1980 | SV* res; | |
b7787f18 | 1981 | const bool oldcatch = CATCH_GET; |
a0d0e21e | 1982 | |
54310121 | 1983 | CATCH_SET(TRUE); |
a0d0e21e LW |
1984 | Zero(&myop, 1, BINOP); |
1985 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 1986 | myop.op_next = NULL; |
54310121 | 1987 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e | 1988 | |
e788e7d3 | 1989 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 1990 | ENTER; |
462e5cf6 | 1991 | SAVEOP(); |
533c011a | 1992 | PL_op = (OP *) &myop; |
3280af22 | 1993 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 1994 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 1995 | PUTBACK; |
cea2e8a9 | 1996 | pp_pushmark(); |
a0d0e21e | 1997 | |
924508f0 | 1998 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
1999 | PUSHs(lr>0? right: left); |
2000 | PUSHs(lr>0? left: right); | |
3280af22 | 2001 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 2002 | if (notfound) { |
89ffc314 | 2003 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e LW |
2004 | } |
2005 | PUSHs((SV*)cv); | |
2006 | PUTBACK; | |
2007 | ||
155aba94 | 2008 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 | 2009 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
2010 | LEAVE; |
2011 | SPAGAIN; | |
2012 | ||
2013 | res=POPs; | |
ebafeae7 | 2014 | PUTBACK; |
d3acc0f7 | 2015 | POPSTACK; |
54310121 | 2016 | CATCH_SET(oldcatch); |
a0d0e21e | 2017 | |
a0d0e21e | 2018 | if (postpr) { |
b7787f18 | 2019 | int ans; |
a0d0e21e LW |
2020 | switch (method) { |
2021 | case le_amg: | |
2022 | case sle_amg: | |
2023 | ans=SvIV(res)<=0; break; | |
2024 | case lt_amg: | |
2025 | case slt_amg: | |
2026 | ans=SvIV(res)<0; break; | |
2027 | case ge_amg: | |
2028 | case sge_amg: | |
2029 | ans=SvIV(res)>=0; break; | |
2030 | case gt_amg: | |
2031 | case sgt_amg: | |
2032 | ans=SvIV(res)>0; break; | |
2033 | case eq_amg: | |
2034 | case seq_amg: | |
2035 | ans=SvIV(res)==0; break; | |
2036 | case ne_amg: | |
2037 | case sne_amg: | |
2038 | ans=SvIV(res)!=0; break; | |
2039 | case inc_amg: | |
2040 | case dec_amg: | |
bbce6d69 | 2041 | SvSetSV(left,res); return left; |
dc437b57 | 2042 | case not_amg: |
fe7ac86a | 2043 | ans=!SvTRUE(res); break; |
b7787f18 AL |
2044 | default: |
2045 | ans=0; break; | |
a0d0e21e | 2046 | } |
54310121 | 2047 | return boolSV(ans); |
748a9306 LW |
2048 | } else if (method==copy_amg) { |
2049 | if (!SvROK(res)) { | |
cea2e8a9 | 2050 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
2051 | } |
2052 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
2053 | } else { |
2054 | return res; | |
2055 | } | |
2056 | } | |
2057 | } | |
c9d5ac95 GS |
2058 | |
2059 | /* | |
7fc63493 | 2060 | =for apidoc is_gv_magical_sv |
c9d5ac95 | 2061 | |
7a5fd60d NC |
2062 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
2063 | ||
2064 | =cut | |
2065 | */ | |
2066 | ||
2067 | bool | |
2068 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) | |
2069 | { | |
2070 | STRLEN len; | |
b64e5050 | 2071 | const char * const temp = SvPV_const(name, len); |
7a5fd60d NC |
2072 | return is_gv_magical(temp, len, flags); |
2073 | } | |
2074 | ||
2075 | /* | |
2076 | =for apidoc is_gv_magical | |
2077 | ||
c9d5ac95 GS |
2078 | Returns C<TRUE> if given the name of a magical GV. |
2079 | ||
2080 | Currently only useful internally when determining if a GV should be | |
2081 | created even in rvalue contexts. | |
2082 | ||
2083 | C<flags> is not used at present but available for future extension to | |
2084 | allow selecting particular classes of magical variable. | |
2085 | ||
b9b0e72c NC |
2086 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
2087 | This assumption is met by all callers within the perl core, which all pass | |
2088 | pointers returned by SvPV. | |
2089 | ||
c9d5ac95 GS |
2090 | =cut |
2091 | */ | |
2092 | bool | |
7fc63493 | 2093 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 | 2094 | { |
b37c2d43 | 2095 | PERL_UNUSED_CONTEXT; |
9d4ba2ae AL |
2096 | PERL_UNUSED_ARG(flags); |
2097 | ||
b9b0e72c | 2098 | if (len > 1) { |
b464bac0 | 2099 | const char * const name1 = name + 1; |
b9b0e72c NC |
2100 | switch (*name) { |
2101 | case 'I': | |
9431620d | 2102 | if (len == 3 && name1[1] == 'S' && name[2] == 'A') |
b9b0e72c NC |
2103 | goto yes; |
2104 | break; | |
2105 | case 'O': | |
9431620d | 2106 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c NC |
2107 | goto yes; |
2108 | break; | |
2109 | case 'S': | |
9431620d | 2110 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c NC |
2111 | goto yes; |
2112 | break; | |
2113 | /* Using ${^...} variables is likely to be sufficiently rare that | |
2114 | it seems sensible to avoid the space hit of also checking the | |
2115 | length. */ | |
2116 | case '\017': /* ${^OPEN} */ | |
9431620d | 2117 | if (strEQ(name1, "PEN")) |
b9b0e72c NC |
2118 | goto yes; |
2119 | break; | |
2120 | case '\024': /* ${^TAINT} */ | |
9431620d | 2121 | if (strEQ(name1, "AINT")) |
b9b0e72c NC |
2122 | goto yes; |
2123 | break; | |
2124 | case '\025': /* ${^UNICODE} */ | |
9431620d | 2125 | if (strEQ(name1, "NICODE")) |
b9b0e72c | 2126 | goto yes; |
a0288114 | 2127 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 | 2128 | goto yes; |
b9b0e72c NC |
2129 | break; |
2130 | case '\027': /* ${^WARNING_BITS} */ | |
9431620d | 2131 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c NC |
2132 | goto yes; |
2133 | break; | |
2134 | case '1': | |
2135 | case '2': | |
2136 | case '3': | |
2137 | case '4': | |
2138 | case '5': | |
2139 | case '6': | |
2140 | case '7': | |
2141 | case '8': | |
2142 | case '9': | |
c9d5ac95 | 2143 | { |
7fc63493 | 2144 | const char *end = name + len; |
c9d5ac95 GS |
2145 | while (--end > name) { |
2146 | if (!isDIGIT(*end)) | |
2147 | return FALSE; | |
2148 | } | |
b9b0e72c NC |
2149 | goto yes; |
2150 | } | |
2151 | } | |
2152 | } else { | |
2153 | /* Because we're already assuming that name is NUL terminated | |
2154 | below, we can treat an empty name as "\0" */ | |
2155 | switch (*name) { | |
2156 | case '&': | |
2157 | case '`': | |
2158 | case '\'': | |
2159 | case ':': | |
2160 | case '?': | |
2161 | case '!': | |
2162 | case '-': | |
2163 | case '#': | |
2164 | case '[': | |
2165 | case '^': | |
2166 | case '~': | |
2167 | case '=': | |
2168 | case '%': | |
2169 | case '.': | |
2170 | case '(': | |
2171 | case ')': | |
2172 | case '<': | |
2173 | case '>': | |
2174 | case ',': | |
2175 | case '\\': | |
2176 | case '/': | |
2177 | case '|': | |
2178 | case '+': | |
2179 | case ';': | |
2180 | case ']': | |
2181 | case '\001': /* $^A */ | |
2182 | case '\003': /* $^C */ | |
2183 | case '\004': /* $^D */ | |
2184 | case '\005': /* $^E */ | |
2185 | case '\006': /* $^F */ | |
2186 | case '\010': /* $^H */ | |
2187 | case '\011': /* $^I, NOT \t in EBCDIC */ | |
2188 | case '\014': /* $^L */ | |
2189 | case '\016': /* $^N */ | |
2190 | case '\017': /* $^O */ | |
2191 | case '\020': /* $^P */ | |
2192 | case '\023': /* $^S */ | |
2193 | case '\024': /* $^T */ | |
2194 | case '\026': /* $^V */ | |
2195 | case '\027': /* $^W */ | |
2196 | case '1': | |
2197 | case '2': | |
2198 | case '3': | |
2199 | case '4': | |
2200 | case '5': | |
2201 | case '6': | |
2202 | case '7': | |
2203 | case '8': | |
2204 | case '9': | |
2205 | yes: | |
2206 | return TRUE; | |
2207 | default: | |
2208 | break; | |
c9d5ac95 | 2209 | } |
c9d5ac95 GS |
2210 | } |
2211 | return FALSE; | |
2212 | } | |
66610fdd | 2213 | |
f5c1e807 NC |
2214 | void |
2215 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
2216 | { | |
2217 | dVAR; | |
acda4c6a | 2218 | U32 hash; |
f5c1e807 | 2219 | |
9f616d01 | 2220 | assert(name); |
f5c1e807 NC |
2221 | PERL_UNUSED_ARG(flags); |
2222 | ||
acda4c6a NC |
2223 | if (len > I32_MAX) |
2224 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); | |
2225 | ||
ae8cc45f NC |
2226 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2227 | unshare_hek(GvNAME_HEK(gv)); | |
2228 | } | |
2229 | ||
acda4c6a | 2230 | PERL_HASH(hash, name, len); |
9f616d01 | 2231 | GvNAME_HEK(gv) = share_hek(name, len, hash); |
f5c1e807 NC |
2232 | } |
2233 | ||
66610fdd RGS |
2234 | /* |
2235 | * Local variables: | |
2236 | * c-indentation-style: bsd | |
2237 | * c-basic-offset: 4 | |
2238 | * indent-tabs-mode: t | |
2239 | * End: | |
2240 | * | |
37442d52 RGS |
2241 | * ex: set ts=8 sts=4 sw=4 noet: |
2242 | */ |