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a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
4bb101f2 | 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
9431620d | 4 | * 2000, 2001, 2002, 2003, 2004, 2005, 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)) | |
48 | GvSV(gv) = NEWSV(72,0); | |
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 LW |
75 | { |
76 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) | |
cea2e8a9 | 77 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
5bd07a3d | 78 | if (!GvIOp(gv)) { |
7fb37951 AMS |
79 | #ifdef GV_UNIQUE_CHECK |
80 | if (GvUNIQUE(gv)) { | |
81 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); | |
5bd07a3d DM |
82 | } |
83 | #endif | |
a0d0e21e | 84 | GvIOp(gv) = newIO(); |
5bd07a3d | 85 | } |
a0d0e21e LW |
86 | return gv; |
87 | } | |
88 | ||
89 | GV * | |
864dbfa3 | 90 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 91 | { |
eacec437 | 92 | char smallbuf[256]; |
53d95988 | 93 | char *tmpbuf; |
8ebc5c01 | 94 | STRLEN tmplen; |
79072805 LW |
95 | GV *gv; |
96 | ||
1d7c1841 GS |
97 | if (!PL_defstash) |
98 | return Nullgv; | |
99 | ||
53d95988 CS |
100 | tmplen = strlen(name) + 2; |
101 | if (tmplen < sizeof smallbuf) | |
102 | tmpbuf = smallbuf; | |
103 | else | |
a02a5408 | 104 | Newx(tmpbuf, tmplen + 1, char); |
0ac0412a | 105 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
106 | tmpbuf[0] = '_'; |
107 | tmpbuf[1] = '<'; | |
490a0e98 | 108 | memcpy(tmpbuf + 2, name, tmplen - 1); |
3280af22 | 109 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 | 110 | if (!isGV(gv)) { |
3280af22 | 111 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 NC |
112 | #ifdef PERL_DONT_CREATE_GVSV |
113 | GvSV(gv) = newSVpvn(name, tmplen - 2); | |
114 | #else | |
115 | sv_setpvn(GvSV(gv), name, tmplen - 2); | |
116 | #endif | |
1d7c1841 | 117 | if (PERLDB_LINE) |
14befaf4 | 118 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile); |
1d7c1841 | 119 | } |
53d95988 CS |
120 | if (tmpbuf != smallbuf) |
121 | Safefree(tmpbuf); | |
79072805 LW |
122 | return gv; |
123 | } | |
124 | ||
463ee0b2 | 125 | void |
864dbfa3 | 126 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 | 127 | { |
27da23d5 | 128 | dVAR; |
463ee0b2 | 129 | register GP *gp; |
e1ec3a88 | 130 | const bool doproto = SvTYPE(gv) > SVt_NULL; |
b15aece3 | 131 | const char * const proto = (doproto && SvPOK(gv)) ? SvPVX_const(gv) : NULL; |
463ee0b2 | 132 | |
dc437b57 | 133 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 GS |
134 | if (SvLEN(gv)) { |
135 | if (proto) { | |
f880fe2f | 136 | SvPV_set(gv, NULL); |
b162af07 | 137 | SvLEN_set(gv, 0); |
55d729e4 GS |
138 | SvPOK_off(gv); |
139 | } else | |
94010e71 | 140 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 141 | } |
a02a5408 | 142 | Newxz(gp, 1, GP); |
8990e307 | 143 | GvGP(gv) = gp_ref(gp); |
c69033f2 NC |
144 | #ifdef PERL_DONT_CREATE_GVSV |
145 | GvSV(gv) = 0; | |
146 | #else | |
463ee0b2 | 147 | GvSV(gv) = NEWSV(72,0); |
c69033f2 | 148 | #endif |
1d7c1841 | 149 | GvLINE(gv) = CopLINE(PL_curcop); |
07409e01 NC |
150 | /* XXX Ideally this cast would be replaced with a change to const char* |
151 | in the struct. */ | |
152 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : (char *) ""; | |
005a453c | 153 | GvCVGEN(gv) = 0; |
463ee0b2 | 154 | GvEGV(gv) = gv; |
14befaf4 | 155 | sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0); |
e15faf7d NC |
156 | GvSTASH(gv) = stash; |
157 | if (stash) | |
158 | Perl_sv_add_backref(aTHX_ (SV*)stash, (SV*)gv); | |
a0d0e21e | 159 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 | 160 | GvNAMELEN(gv) = len; |
23ad5bf5 | 161 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 | 162 | GvMULTI_on(gv); |
55d729e4 | 163 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 | 164 | SvIOK_off(gv); |
55d729e4 | 165 | ENTER; |
b099ddc0 | 166 | /* XXX unsafe for threads if eval_owner isn't held */ |
0b1558d1 | 167 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
3280af22 | 168 | GvCV(gv) = PL_compcv; |
55d729e4 GS |
169 | LEAVE; |
170 | ||
3280af22 | 171 | PL_sub_generation++; |
65c50114 | 172 | CvGV(GvCV(gv)) = gv; |
e0d088d0 | 173 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 | 174 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 GS |
175 | if (proto) { |
176 | sv_setpv((SV*)GvCV(gv), proto); | |
177 | Safefree(proto); | |
178 | } | |
179 | } | |
463ee0b2 LW |
180 | } |
181 | ||
76e3520e | 182 | STATIC void |
cea2e8a9 | 183 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e LW |
184 | { |
185 | switch (sv_type) { | |
186 | case SVt_PVIO: | |
187 | (void)GvIOn(gv); | |
188 | break; | |
189 | case SVt_PVAV: | |
190 | (void)GvAVn(gv); | |
191 | break; | |
192 | case SVt_PVHV: | |
193 | (void)GvHVn(gv); | |
194 | break; | |
c69033f2 NC |
195 | #ifdef PERL_DONT_CREATE_GVSV |
196 | case SVt_NULL: | |
197 | case SVt_PVCV: | |
198 | case SVt_PVFM: | |
199 | break; | |
200 | default: | |
201 | (void)GvSVn(gv); | |
202 | #endif | |
a0d0e21e LW |
203 | } |
204 | } | |
205 | ||
954c1994 GS |
206 | /* |
207 | =for apidoc gv_fetchmeth | |
208 | ||
209 | Returns the glob with the given C<name> and a defined subroutine or | |
210 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
07766739 | 211 | accessible via @ISA and UNIVERSAL::. |
954c1994 GS |
212 | |
213 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
214 | side-effect creates a glob with the given C<name> in the given C<stash> | |
215 | which in the case of success contains an alias for the subroutine, and sets | |
b267980d | 216 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 GS |
217 | |
218 | This function grants C<"SUPER"> token as a postfix of the stash name. The | |
219 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not | |
4929bf7b | 220 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 221 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 222 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
223 | |
224 | =cut | |
225 | */ | |
226 | ||
79072805 | 227 | GV * |
864dbfa3 | 228 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 LW |
229 | { |
230 | AV* av; | |
463ee0b2 | 231 | GV* topgv; |
79072805 | 232 | GV* gv; |
463ee0b2 | 233 | GV** gvp; |
748a9306 | 234 | CV* cv; |
bfcb3514 | 235 | const char *hvname; |
a0d0e21e | 236 | |
af09ea45 IK |
237 | /* UNIVERSAL methods should be callable without a stash */ |
238 | if (!stash) { | |
239 | level = -1; /* probably appropriate */ | |
240 | if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE))) | |
241 | return 0; | |
242 | } | |
243 | ||
bfcb3514 NC |
244 | hvname = HvNAME_get(stash); |
245 | if (!hvname) | |
e27ad1f2 AV |
246 | Perl_croak(aTHX_ |
247 | "Can't use anonymous symbol table for method lookup"); | |
248 | ||
44a8e56a | 249 | if ((level > 100) || (level < -100)) |
cea2e8a9 | 250 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
bfcb3514 | 251 | name, hvname); |
463ee0b2 | 252 | |
bfcb3514 | 253 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a | 254 | |
255 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
256 | if (!gvp) | |
257 | topgv = Nullgv; | |
258 | else { | |
259 | topgv = *gvp; | |
260 | if (SvTYPE(topgv) != SVt_PVGV) | |
261 | gv_init(topgv, stash, name, len, TRUE); | |
155aba94 | 262 | if ((cv = GvCV(topgv))) { |
44a8e56a | 263 | /* If genuine method or valid cache entry, use it */ |
3280af22 | 264 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 | 265 | return topgv; |
44a8e56a | 266 | /* Stale cached entry: junk it */ |
267 | SvREFCNT_dec(cv); | |
268 | GvCV(topgv) = cv = Nullcv; | |
269 | GvCVGEN(topgv) = 0; | |
748a9306 | 270 | } |
3280af22 | 271 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c | 272 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 | 273 | } |
79072805 | 274 | |
9607fc9c | 275 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 | 276 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c | 277 | |
fb73857a | 278 | /* create and re-create @.*::SUPER::ISA on demand */ |
279 | if (!av || !SvMAGIC(av)) { | |
7423f6db | 280 | STRLEN packlen = HvNAMELEN_get(stash); |
9607fc9c | 281 | |
bfcb3514 | 282 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { |
9607fc9c | 283 | HV* basestash; |
284 | ||
285 | packlen -= 7; | |
bfcb3514 | 286 | basestash = gv_stashpvn(hvname, packlen, TRUE); |
9607fc9c | 287 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 | 288 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
9607fc9c | 289 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
290 | if (!gvp || !(gv = *gvp)) | |
bfcb3514 | 291 | Perl_croak(aTHX_ "Cannot create %s::ISA", hvname); |
9607fc9c | 292 | if (SvTYPE(gv) != SVt_PVGV) |
293 | gv_init(gv, stash, "ISA", 3, TRUE); | |
294 | SvREFCNT_dec(GvAV(gv)); | |
295 | GvAV(gv) = (AV*)SvREFCNT_inc(av); | |
296 | } | |
297 | } | |
298 | } | |
299 | ||
300 | if (av) { | |
79072805 | 301 | SV** svp = AvARRAY(av); |
93965878 NIS |
302 | /* NOTE: No support for tied ISA */ |
303 | I32 items = AvFILLp(av) + 1; | |
79072805 | 304 | while (items--) { |
823a54a3 AL |
305 | SV* const sv = *svp++; |
306 | HV* const basestash = gv_stashsv(sv, FALSE); | |
9bbf4081 | 307 | if (!basestash) { |
599cee73 | 308 | if (ckWARN(WARN_MISC)) |
35c1215d | 309 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %"SVf" for @%s::ISA", |
bfcb3514 | 310 | sv, hvname); |
79072805 LW |
311 | continue; |
312 | } | |
44a8e56a | 313 | gv = gv_fetchmeth(basestash, name, len, |
314 | (level >= 0) ? level + 1 : level - 1); | |
315 | if (gv) | |
316 | goto gotcha; | |
79072805 LW |
317 | } |
318 | } | |
a0d0e21e | 319 | |
9607fc9c | 320 | /* if at top level, try UNIVERSAL */ |
321 | ||
44a8e56a | 322 | if (level == 0 || level == -1) { |
823a54a3 | 323 | HV* const lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE); |
9607fc9c | 324 | |
823a54a3 | 325 | if (lastchance) { |
155aba94 GS |
326 | if ((gv = gv_fetchmeth(lastchance, name, len, |
327 | (level >= 0) ? level + 1 : level - 1))) | |
328 | { | |
44a8e56a | 329 | gotcha: |
dc848c6f | 330 | /* |
331 | * Cache method in topgv if: | |
332 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
333 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
334 | */ | |
335 | if (topgv && | |
336 | GvREFCNT(topgv) == 1 && | |
337 | (cv = GvCV(gv)) && | |
338 | (CvROOT(cv) || CvXSUB(cv))) | |
339 | { | |
155aba94 | 340 | if ((cv = GvCV(topgv))) |
44a8e56a | 341 | SvREFCNT_dec(cv); |
342 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); | |
3280af22 | 343 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a | 344 | } |
a0d0e21e LW |
345 | return gv; |
346 | } | |
005a453c JP |
347 | else if (topgv && GvREFCNT(topgv) == 1) { |
348 | /* cache the fact that the method is not defined */ | |
3280af22 | 349 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c | 350 | } |
a0d0e21e LW |
351 | } |
352 | } | |
353 | ||
79072805 LW |
354 | return 0; |
355 | } | |
356 | ||
954c1994 | 357 | /* |
611c1e95 IZ |
358 | =for apidoc gv_fetchmeth_autoload |
359 | ||
360 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. | |
361 | Returns a glob for the subroutine. | |
362 | ||
363 | For an autoloaded subroutine without a GV, will create a GV even | |
364 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() | |
365 | of the result may be zero. | |
366 | ||
367 | =cut | |
368 | */ | |
369 | ||
370 | GV * | |
371 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) | |
372 | { | |
373 | GV *gv = gv_fetchmeth(stash, name, len, level); | |
374 | ||
375 | if (!gv) { | |
611c1e95 IZ |
376 | CV *cv; |
377 | GV **gvp; | |
378 | ||
379 | if (!stash) | |
380 | return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ | |
5c7983e5 | 381 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
611c1e95 | 382 | return Nullgv; |
5c7983e5 | 383 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
611c1e95 IZ |
384 | return Nullgv; |
385 | cv = GvCV(gv); | |
386 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
387 | return Nullgv; | |
388 | /* Have an autoload */ | |
389 | if (level < 0) /* Cannot do without a stub */ | |
390 | gv_fetchmeth(stash, name, len, 0); | |
391 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
392 | if (!gvp) | |
393 | return Nullgv; | |
394 | return *gvp; | |
395 | } | |
396 | return gv; | |
397 | } | |
398 | ||
399 | /* | |
954c1994 GS |
400 | =for apidoc gv_fetchmethod |
401 | ||
6d0f518e | 402 | See L<gv_fetchmethod_autoload>. |
954c1994 GS |
403 | |
404 | =cut | |
405 | */ | |
406 | ||
79072805 | 407 | GV * |
864dbfa3 | 408 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
463ee0b2 | 409 | { |
dc848c6f | 410 | return gv_fetchmethod_autoload(stash, name, TRUE); |
411 | } | |
412 | ||
954c1994 GS |
413 | /* |
414 | =for apidoc gv_fetchmethod_autoload | |
415 | ||
416 | Returns the glob which contains the subroutine to call to invoke the method | |
417 | on the C<stash>. In fact in the presence of autoloading this may be the | |
418 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is | |
b267980d | 419 | already setup. |
954c1994 GS |
420 | |
421 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
422 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 423 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 424 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 425 | with a non-zero C<autoload> parameter. |
954c1994 GS |
426 | |
427 | These functions grant C<"SUPER"> token as a prefix of the method name. Note | |
428 | that if you want to keep the returned glob for a long time, you need to | |
429 | check for it being "AUTOLOAD", since at the later time the call may load a | |
430 | different subroutine due to $AUTOLOAD changing its value. Use the glob | |
b267980d | 431 | created via a side effect to do this. |
954c1994 GS |
432 | |
433 | These functions have the same side-effects and as C<gv_fetchmeth> with | |
434 | C<level==0>. C<name> should be writable if contains C<':'> or C<' | |
435 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to | |
b267980d | 436 | C<call_sv> apply equally to these functions. |
954c1994 GS |
437 | |
438 | =cut | |
439 | */ | |
440 | ||
dc848c6f | 441 | GV * |
864dbfa3 | 442 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 443 | { |
08105a92 GS |
444 | register const char *nend; |
445 | const char *nsplit = 0; | |
a0d0e21e | 446 | GV* gv; |
0dae17bd GS |
447 | HV* ostash = stash; |
448 | ||
449 | if (stash && SvTYPE(stash) < SVt_PVHV) | |
450 | stash = Nullhv; | |
b267980d | 451 | |
463ee0b2 | 452 | for (nend = name; *nend; nend++) { |
9607fc9c | 453 | if (*nend == '\'') |
a0d0e21e | 454 | nsplit = nend; |
9607fc9c | 455 | else if (*nend == ':' && *(nend + 1) == ':') |
456 | nsplit = ++nend; | |
a0d0e21e LW |
457 | } |
458 | if (nsplit) { | |
9d4ba2ae | 459 | const char * const origname = name; |
a0d0e21e | 460 | name = nsplit + 1; |
a0d0e21e LW |
461 | if (*nsplit == ':') |
462 | --nsplit; | |
9607fc9c | 463 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
464 | /* ->SUPER::method should really be looked up in original stash */ | |
cea2e8a9 | 465 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 | 466 | CopSTASHPV(PL_curcop))); |
af09ea45 | 467 | /* __PACKAGE__::SUPER stash should be autovivified */ |
b15aece3 | 468 | stash = gv_stashpvn(SvPVX_const(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 | 469 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 | 470 | origname, HvNAME_get(stash), name) ); |
4633a7c4 | 471 | } |
e189a56d | 472 | else { |
af09ea45 IK |
473 | /* don't autovifify if ->NoSuchStash::method */ |
474 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); | |
e189a56d IK |
475 | |
476 | /* however, explicit calls to Pkg::SUPER::method may | |
477 | happen, and may require autovivification to work */ | |
478 | if (!stash && (nsplit - origname) >= 7 && | |
479 | strnEQ(nsplit - 7, "::SUPER", 7) && | |
480 | gv_stashpvn(origname, nsplit - origname - 7, FALSE)) | |
481 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); | |
482 | } | |
0dae17bd | 483 | ostash = stash; |
4633a7c4 LW |
484 | } |
485 | ||
9607fc9c | 486 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 487 | if (!gv) { |
2f6e0fe7 | 488 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 | 489 | gv = (GV*)&PL_sv_yes; |
dc848c6f | 490 | else if (autoload) |
0dae17bd | 491 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
463ee0b2 | 492 | } |
dc848c6f | 493 | else if (autoload) { |
9d4ba2ae | 494 | CV* const cv = GvCV(gv); |
09280a33 CS |
495 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
496 | GV* stubgv; | |
497 | GV* autogv; | |
498 | ||
499 | if (CvANON(cv)) | |
500 | stubgv = gv; | |
501 | else { | |
502 | stubgv = CvGV(cv); | |
503 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
504 | stubgv = gv; | |
505 | } | |
506 | autogv = gv_autoload4(GvSTASH(stubgv), | |
507 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 508 | if (autogv) |
509 | gv = autogv; | |
510 | } | |
511 | } | |
44a8e56a | 512 | |
513 | return gv; | |
514 | } | |
515 | ||
516 | GV* | |
864dbfa3 | 517 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a | 518 | { |
27da23d5 | 519 | dVAR; |
44a8e56a | 520 | GV* gv; |
521 | CV* cv; | |
522 | HV* varstash; | |
523 | GV* vargv; | |
524 | SV* varsv; | |
e1ec3a88 | 525 | const char *packname = ""; |
7423f6db | 526 | STRLEN packname_len; |
44a8e56a | 527 | |
5c7983e5 | 528 | if (len == S_autolen && strnEQ(name, S_autoload, S_autolen)) |
44a8e56a | 529 | return Nullgv; |
0dae17bd GS |
530 | if (stash) { |
531 | if (SvTYPE(stash) < SVt_PVHV) { | |
e62f0680 | 532 | packname = SvPV_const((SV*)stash, packname_len); |
0dae17bd GS |
533 | stash = Nullhv; |
534 | } | |
535 | else { | |
bfcb3514 | 536 | packname = HvNAME_get(stash); |
7423f6db | 537 | packname_len = HvNAMELEN_get(stash); |
0dae17bd GS |
538 | } |
539 | } | |
5c7983e5 | 540 | if (!(gv = gv_fetchmeth(stash, S_autoload, S_autolen, FALSE))) |
dc848c6f | 541 | return Nullgv; |
542 | cv = GvCV(gv); | |
543 | ||
adb5a9ae | 544 | if (!(CvROOT(cv) || CvXSUB(cv))) |
ed850460 JH |
545 | return Nullgv; |
546 | ||
dc848c6f | 547 | /* |
548 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
549 | */ | |
041457d9 DM |
550 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
551 | && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) | |
552 | ) | |
12bcd1a6 | 553 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f | 554 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
0dae17bd | 555 | packname, (int)len, name); |
44a8e56a | 556 | |
adb5a9ae DM |
557 | if (CvXSUB(cv)) { |
558 | /* rather than lookup/init $AUTOLOAD here | |
559 | * only to have the XSUB do another lookup for $AUTOLOAD | |
560 | * and split that value on the last '::', | |
561 | * pass along the same data via some unused fields in the CV | |
562 | */ | |
563 | CvSTASH(cv) = stash; | |
f880fe2f | 564 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 | 565 | SvCUR_set(cv, len); |
adb5a9ae DM |
566 | return gv; |
567 | } | |
adb5a9ae | 568 | |
44a8e56a | 569 | /* |
570 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
571 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
572 | * use that, but for lack of anything better we will use the sub's | |
573 | * original package to look up $AUTOLOAD. | |
574 | */ | |
575 | varstash = GvSTASH(CvGV(cv)); | |
5c7983e5 | 576 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
577 | ENTER; |
578 | ||
c69033f2 | 579 | if (!isGV(vargv)) { |
5c7983e5 | 580 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 NC |
581 | #ifdef PERL_DONT_CREATE_GVSV |
582 | GvSV(vargv) = NEWSV(72,0); | |
583 | #endif | |
584 | } | |
3d35f11b | 585 | LEAVE; |
e203899d | 586 | varsv = GvSVn(vargv); |
7423f6db | 587 | sv_setpvn(varsv, packname, packname_len); |
44a8e56a | 588 | sv_catpvn(varsv, "::", 2); |
589 | sv_catpvn(varsv, name, len); | |
590 | SvTAINTED_off(varsv); | |
a0d0e21e LW |
591 | return gv; |
592 | } | |
593 | ||
d2c93421 RH |
594 | /* The "gv" parameter should be the glob known to Perl code as *! |
595 | * The scalar must already have been magicalized. | |
596 | */ | |
597 | STATIC void | |
598 | S_require_errno(pTHX_ GV *gv) | |
599 | { | |
27da23d5 | 600 | dVAR; |
d2c93421 RH |
601 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
602 | ||
a0288114 | 603 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
d2c93421 RH |
604 | dSP; |
605 | PUTBACK; | |
606 | ENTER; | |
607 | save_scalar(gv); /* keep the value of $! */ | |
84f1fa11 AMS |
608 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
609 | newSVpvn("Errno",5), Nullsv); | |
d2c93421 RH |
610 | LEAVE; |
611 | SPAGAIN; | |
612 | stash = gv_stashpvn("Errno",5,FALSE); | |
613 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) | |
614 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); | |
615 | } | |
616 | } | |
617 | ||
954c1994 GS |
618 | /* |
619 | =for apidoc gv_stashpv | |
620 | ||
386d01d6 | 621 | Returns a pointer to the stash for a specified package. C<name> should |
bc96cb06 SH |
622 | be a valid UTF-8 string and must be null-terminated. If C<create> is set |
623 | then the package will be created if it does not already exist. If C<create> | |
624 | is not set and the package does not exist then NULL is returned. | |
954c1994 GS |
625 | |
626 | =cut | |
627 | */ | |
628 | ||
a0d0e21e | 629 | HV* |
864dbfa3 | 630 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 631 | { |
dc437b57 | 632 | return gv_stashpvn(name, strlen(name), create); |
633 | } | |
634 | ||
bc96cb06 SH |
635 | /* |
636 | =for apidoc gv_stashpvn | |
637 | ||
638 | Returns a pointer to the stash for a specified package. C<name> should | |
639 | be a valid UTF-8 string. The C<namelen> parameter indicates the length of | |
640 | the C<name>, in bytes. If C<create> is set then the package will be | |
641 | created if it does not already exist. If C<create> is not set and the | |
642 | package does not exist then NULL is returned. | |
643 | ||
644 | =cut | |
645 | */ | |
646 | ||
dc437b57 | 647 | HV* |
864dbfa3 | 648 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 | 649 | { |
46fc3d4c | 650 | char smallbuf[256]; |
651 | char *tmpbuf; | |
a0d0e21e LW |
652 | HV *stash; |
653 | GV *tmpgv; | |
dc437b57 | 654 | |
46fc3d4c | 655 | if (namelen + 3 < sizeof smallbuf) |
656 | tmpbuf = smallbuf; | |
657 | else | |
a02a5408 | 658 | Newx(tmpbuf, namelen + 3, char); |
dc437b57 | 659 | Copy(name,tmpbuf,namelen,char); |
660 | tmpbuf[namelen++] = ':'; | |
661 | tmpbuf[namelen++] = ':'; | |
662 | tmpbuf[namelen] = '\0'; | |
46fc3d4c | 663 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
664 | if (tmpbuf != smallbuf) | |
665 | Safefree(tmpbuf); | |
a0d0e21e LW |
666 | if (!tmpgv) |
667 | return 0; | |
668 | if (!GvHV(tmpgv)) | |
669 | GvHV(tmpgv) = newHV(); | |
670 | stash = GvHV(tmpgv); | |
bfcb3514 | 671 | if (!HvNAME_get(stash)) |
51a37f80 | 672 | hv_name_set(stash, name, namelen, 0); |
a0d0e21e | 673 | return stash; |
463ee0b2 LW |
674 | } |
675 | ||
954c1994 GS |
676 | /* |
677 | =for apidoc gv_stashsv | |
678 | ||
386d01d6 GS |
679 | Returns a pointer to the stash for a specified package, which must be a |
680 | valid UTF-8 string. See C<gv_stashpv>. | |
954c1994 GS |
681 | |
682 | =cut | |
683 | */ | |
684 | ||
a0d0e21e | 685 | HV* |
864dbfa3 | 686 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e | 687 | { |
dc437b57 | 688 | STRLEN len; |
9d4ba2ae | 689 | const char * const ptr = SvPV_const(sv,len); |
dc437b57 | 690 | return gv_stashpvn(ptr, len, create); |
a0d0e21e LW |
691 | } |
692 | ||
693 | ||
463ee0b2 | 694 | GV * |
7a5fd60d | 695 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) { |
b7787f18 | 696 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
697 | } |
698 | ||
699 | GV * | |
700 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, I32 sv_type) { | |
701 | STRLEN len; | |
9d4ba2ae | 702 | const char * const nambeg = SvPV_const(name, len); |
7a5fd60d NC |
703 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
704 | } | |
705 | ||
706 | GV * | |
707 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
708 | I32 sv_type) | |
79072805 | 709 | { |
08105a92 | 710 | register const char *name = nambeg; |
463ee0b2 | 711 | register GV *gv = 0; |
79072805 | 712 | GV**gvp; |
79072805 | 713 | I32 len; |
08105a92 | 714 | register const char *namend; |
463ee0b2 | 715 | HV *stash = 0; |
dd374669 | 716 | const I32 add = flags & ~SVf_UTF8; |
890ce7af AL |
717 | |
718 | PERL_UNUSED_ARG(full_len); | |
79072805 | 719 | |
c07a80fd | 720 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
721 | name++; | |
722 | ||
79072805 | 723 | for (namend = name; *namend; namend++) { |
1d7c1841 GS |
724 | if ((*namend == ':' && namend[1] == ':') |
725 | || (*namend == '\'' && namend[1])) | |
463ee0b2 | 726 | { |
463ee0b2 | 727 | if (!stash) |
3280af22 | 728 | stash = PL_defstash; |
dc437b57 | 729 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e | 730 | return Nullgv; |
463ee0b2 | 731 | |
85e6fe83 LW |
732 | len = namend - name; |
733 | if (len > 0) { | |
3c78fafa | 734 | char smallbuf[256]; |
62b57502 | 735 | char *tmpbuf; |
62b57502 | 736 | |
25c09a70 | 737 | if (len + 3 < sizeof (smallbuf)) |
3c78fafa | 738 | tmpbuf = smallbuf; |
62b57502 | 739 | else |
a02a5408 | 740 | Newx(tmpbuf, len+3, char); |
a0d0e21e LW |
741 | Copy(name, tmpbuf, len, char); |
742 | tmpbuf[len++] = ':'; | |
743 | tmpbuf[len++] = ':'; | |
744 | tmpbuf[len] = '\0'; | |
463ee0b2 | 745 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 | 746 | gv = gvp ? *gvp : Nullgv; |
3280af22 | 747 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 | 748 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 | 749 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 GS |
750 | else |
751 | GvMULTI_on(gv); | |
752 | } | |
3c78fafa | 753 | if (tmpbuf != smallbuf) |
62b57502 | 754 | Safefree(tmpbuf); |
3280af22 | 755 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e | 756 | return Nullgv; |
85e6fe83 | 757 | |
463ee0b2 LW |
758 | if (!(stash = GvHV(gv))) |
759 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 760 | |
bfcb3514 | 761 | if (!HvNAME_get(stash)) |
51a37f80 | 762 | hv_name_set(stash, nambeg, namend - nambeg, 0); |
463ee0b2 LW |
763 | } |
764 | ||
765 | if (*namend == ':') | |
766 | namend++; | |
767 | namend++; | |
768 | name = namend; | |
769 | if (!*name) | |
3280af22 | 770 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 | 771 | } |
79072805 | 772 | } |
a0d0e21e | 773 | len = namend - name; |
463ee0b2 LW |
774 | |
775 | /* No stash in name, so see how we can default */ | |
776 | ||
777 | if (!stash) { | |
7e2040f0 | 778 | if (isIDFIRST_lazy(name)) { |
9607fc9c | 779 | bool global = FALSE; |
780 | ||
18ea00d7 NC |
781 | /* name is always \0 terminated, and initial \0 wouldn't return |
782 | true from isIDFIRST_lazy, so we know that name[1] is defined */ | |
783 | switch (name[1]) { | |
784 | case '\0': | |
785 | if (*name == '_') | |
9d116dd7 | 786 | global = TRUE; |
18ea00d7 NC |
787 | break; |
788 | case 'N': | |
789 | if (strEQ(name, "INC") || strEQ(name, "ENV")) | |
9d116dd7 | 790 | global = TRUE; |
18ea00d7 NC |
791 | break; |
792 | case 'I': | |
793 | if (strEQ(name, "SIG")) | |
9d116dd7 | 794 | global = TRUE; |
18ea00d7 NC |
795 | break; |
796 | case 'T': | |
797 | if (strEQ(name, "STDIN") || strEQ(name, "STDOUT") || | |
798 | strEQ(name, "STDERR")) | |
463ee0b2 | 799 | global = TRUE; |
18ea00d7 NC |
800 | break; |
801 | case 'R': | |
802 | if (strEQ(name, "ARGV") || strEQ(name, "ARGVOUT")) | |
803 | global = TRUE; | |
804 | break; | |
463ee0b2 | 805 | } |
9607fc9c | 806 | |
463ee0b2 | 807 | if (global) |
3280af22 | 808 | stash = PL_defstash; |
923e4eb5 | 809 | else if (IN_PERL_COMPILETIME) { |
3280af22 NIS |
810 | stash = PL_curstash; |
811 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
748a9306 LW |
812 | sv_type != SVt_PVCV && |
813 | sv_type != SVt_PVGV && | |
4633a7c4 | 814 | sv_type != SVt_PVFM && |
c07a80fd | 815 | sv_type != SVt_PVIO && |
70ec6265 NC |
816 | !(len == 1 && sv_type == SVt_PV && |
817 | (*name == 'a' || *name == 'b')) ) | |
748a9306 | 818 | { |
4633a7c4 LW |
819 | gvp = (GV**)hv_fetch(stash,name,len,0); |
820 | if (!gvp || | |
3280af22 | 821 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 AD |
822 | SvTYPE(*gvp) != SVt_PVGV) |
823 | { | |
4633a7c4 | 824 | stash = 0; |
a5f75d66 | 825 | } |
155aba94 GS |
826 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
827 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
828 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
4633a7c4 | 829 | { |
cea2e8a9 | 830 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 LW |
831 | sv_type == SVt_PVAV ? '@' : |
832 | sv_type == SVt_PVHV ? '%' : '$', | |
833 | name); | |
8ebc5c01 | 834 | if (GvCVu(*gvp)) |
cc507455 | 835 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e | 836 | stash = 0; |
4633a7c4 | 837 | } |
a0d0e21e | 838 | } |
85e6fe83 | 839 | } |
463ee0b2 | 840 | else |
1d7c1841 | 841 | stash = CopSTASH(PL_curcop); |
463ee0b2 LW |
842 | } |
843 | else | |
3280af22 | 844 | stash = PL_defstash; |
463ee0b2 LW |
845 | } |
846 | ||
847 | /* By this point we should have a stash and a name */ | |
848 | ||
a0d0e21e | 849 | if (!stash) { |
5a844595 | 850 | if (add) { |
9d4ba2ae | 851 | SV * const err = Perl_mess(aTHX_ |
5a844595 GS |
852 | "Global symbol \"%s%s\" requires explicit package name", |
853 | (sv_type == SVt_PV ? "$" | |
854 | : sv_type == SVt_PVAV ? "@" | |
855 | : sv_type == SVt_PVHV ? "%" | |
608b3986 AE |
856 | : ""), name); |
857 | if (USE_UTF8_IN_NAMES) | |
858 | SvUTF8_on(err); | |
859 | qerror(err); | |
d7aacf4e | 860 | stash = GvHV(gv_fetchpv("<none>::", GV_ADDMULTI, SVt_PVHV)); |
a0d0e21e | 861 | } |
d7aacf4e RGS |
862 | else |
863 | return Nullgv; | |
a0d0e21e LW |
864 | } |
865 | ||
866 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
867 | return Nullgv; | |
868 | ||
79072805 | 869 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 | 870 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 LW |
871 | return Nullgv; |
872 | gv = *gvp; | |
873 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e | 874 | if (add) { |
a5f75d66 | 875 | GvMULTI_on(gv); |
a0d0e21e | 876 | gv_init_sv(gv, sv_type); |
d2c93421 RH |
877 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
878 | require_errno(gv); | |
a0d0e21e | 879 | } |
79072805 | 880 | return gv; |
55d729e4 GS |
881 | } else if (add & GV_NOINIT) { |
882 | return gv; | |
79072805 | 883 | } |
93a17b20 LW |
884 | |
885 | /* Adding a new symbol */ | |
886 | ||
0453d815 | 887 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d | 888 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 | 889 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e | 890 | gv_init_sv(gv, sv_type); |
93a17b20 | 891 | |
a0288114 | 892 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d | 893 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 PM |
894 | GvMULTI_on(gv) ; |
895 | ||
93a17b20 | 896 | /* set up magic where warranted */ |
cc4c2da6 | 897 | if (len > 1) { |
9431620d | 898 | #ifndef EBCDIC |
cc4c2da6 NC |
899 | if (*name > 'V' ) { |
900 | /* Nothing else to do. | |
91f565cb | 901 | The compiler will probably turn the switch statement into a |
cc4c2da6 NC |
902 | branch table. Make sure we avoid even that small overhead for |
903 | the common case of lower case variable names. */ | |
9431620d NC |
904 | } else |
905 | #endif | |
906 | { | |
b464bac0 | 907 | const char * const name2 = name + 1; |
cc4c2da6 NC |
908 | switch (*name) { |
909 | case 'A': | |
910 | if (strEQ(name2, "RGV")) { | |
911 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
912 | } | |
913 | break; | |
914 | case 'E': | |
915 | if (strnEQ(name2, "XPORT", 5)) | |
916 | GvMULTI_on(gv); | |
917 | break; | |
918 | case 'I': | |
919 | if (strEQ(name2, "SA")) { | |
9d4ba2ae | 920 | AV* const av = GvAVn(gv); |
cc4c2da6 NC |
921 | GvMULTI_on(gv); |
922 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0); | |
923 | /* NOTE: No support for tied ISA */ | |
924 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") | |
925 | && AvFILLp(av) == -1) | |
926 | { | |
e1ec3a88 | 927 | const char *pname; |
cc4c2da6 NC |
928 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
929 | gv_stashpvn(pname, 9, TRUE); | |
930 | av_push(av, newSVpvn(pname = "DB_File",7)); | |
931 | gv_stashpvn(pname, 7, TRUE); | |
932 | av_push(av, newSVpvn(pname = "GDBM_File",9)); | |
933 | gv_stashpvn(pname, 9, TRUE); | |
934 | av_push(av, newSVpvn(pname = "SDBM_File",9)); | |
935 | gv_stashpvn(pname, 9, TRUE); | |
936 | av_push(av, newSVpvn(pname = "ODBM_File",9)); | |
937 | gv_stashpvn(pname, 9, TRUE); | |
938 | } | |
939 | } | |
940 | break; | |
941 | case 'O': | |
942 | if (strEQ(name2, "VERLOAD")) { | |
9d4ba2ae | 943 | HV* const hv = GvHVn(gv); |
cc4c2da6 NC |
944 | GvMULTI_on(gv); |
945 | hv_magic(hv, Nullgv, PERL_MAGIC_overload); | |
946 | } | |
947 | break; | |
948 | case 'S': | |
949 | if (strEQ(name2, "IG")) { | |
950 | HV *hv; | |
951 | I32 i; | |
952 | if (!PL_psig_ptr) { | |
a02a5408 JC |
953 | Newxz(PL_psig_ptr, SIG_SIZE, SV*); |
954 | Newxz(PL_psig_name, SIG_SIZE, SV*); | |
955 | Newxz(PL_psig_pend, SIG_SIZE, int); | |
cc4c2da6 NC |
956 | } |
957 | GvMULTI_on(gv); | |
958 | hv = GvHVn(gv); | |
959 | hv_magic(hv, Nullgv, PERL_MAGIC_sig); | |
960 | for (i = 1; i < SIG_SIZE; i++) { | |
551405c4 | 961 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
962 | if (init) |
963 | sv_setsv(*init, &PL_sv_undef); | |
964 | PL_psig_ptr[i] = 0; | |
965 | PL_psig_name[i] = 0; | |
966 | PL_psig_pend[i] = 0; | |
967 | } | |
968 | } | |
969 | break; | |
970 | case 'V': | |
971 | if (strEQ(name2, "ERSION")) | |
972 | GvMULTI_on(gv); | |
973 | break; | |
e5218da5 GA |
974 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
975 | if (strEQ(name2, "HILD_ERROR_NATIVE")) | |
976 | goto magicalize; | |
977 | break; | |
cc4c2da6 NC |
978 | case '\005': /* $^ENCODING */ |
979 | if (strEQ(name2, "NCODING")) | |
980 | goto magicalize; | |
981 | break; | |
982 | case '\017': /* $^OPEN */ | |
983 | if (strEQ(name2, "PEN")) | |
984 | goto magicalize; | |
985 | break; | |
986 | case '\024': /* ${^TAINT} */ | |
987 | if (strEQ(name2, "AINT")) | |
988 | goto ro_magicalize; | |
989 | break; | |
7cebcbc0 | 990 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 | 991 | if (strEQ(name2, "NICODE")) |
cc4c2da6 | 992 | goto ro_magicalize; |
a0288114 | 993 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 | 994 | goto ro_magicalize; |
cc4c2da6 NC |
995 | break; |
996 | case '\027': /* $^WARNING_BITS */ | |
997 | if (strEQ(name2, "ARNING_BITS")) | |
998 | goto magicalize; | |
999 | break; | |
1000 | case '1': | |
1001 | case '2': | |
1002 | case '3': | |
1003 | case '4': | |
1004 | case '5': | |
1005 | case '6': | |
1006 | case '7': | |
1007 | case '8': | |
1008 | case '9': | |
85e6fe83 | 1009 | { |
cc4c2da6 NC |
1010 | /* ensures variable is only digits */ |
1011 | /* ${"1foo"} fails this test (and is thus writeable) */ | |
1012 | /* added by japhy, but borrowed from is_gv_magical */ | |
1013 | const char *end = name + len; | |
1014 | while (--end > name) { | |
1015 | if (!isDIGIT(*end)) return gv; | |
1016 | } | |
1017 | goto ro_magicalize; | |
1d7c1841 | 1018 | } |
dc437b57 | 1019 | } |
93a17b20 | 1020 | } |
392db708 NC |
1021 | } else { |
1022 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
1023 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 NC |
1024 | switch (*name) { |
1025 | case '&': | |
1026 | case '`': | |
1027 | case '\'': | |
1028 | if ( | |
1029 | sv_type == SVt_PVAV || | |
1030 | sv_type == SVt_PVHV || | |
1031 | sv_type == SVt_PVCV || | |
1032 | sv_type == SVt_PVFM || | |
1033 | sv_type == SVt_PVIO | |
1034 | ) { break; } | |
1035 | PL_sawampersand = TRUE; | |
1036 | goto ro_magicalize; | |
1037 | ||
1038 | case ':': | |
c69033f2 | 1039 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
1040 | goto magicalize; |
1041 | ||
1042 | case '?': | |
ff0cee69 | 1043 | #ifdef COMPLEX_STATUS |
c69033f2 | 1044 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 1045 | #endif |
cc4c2da6 | 1046 | goto magicalize; |
ff0cee69 | 1047 | |
cc4c2da6 | 1048 | case '!': |
d2c93421 | 1049 | |
cc4c2da6 NC |
1050 | /* If %! has been used, automatically load Errno.pm. |
1051 | The require will itself set errno, so in order to | |
1052 | preserve its value we have to set up the magic | |
1053 | now (rather than going to magicalize) | |
1054 | */ | |
d2c93421 | 1055 | |
c69033f2 | 1056 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 | 1057 | |
cc4c2da6 NC |
1058 | if (sv_type == SVt_PVHV) |
1059 | require_errno(gv); | |
d2c93421 | 1060 | |
6cef1e77 | 1061 | break; |
cc4c2da6 NC |
1062 | case '-': |
1063 | { | |
9d4ba2ae | 1064 | AV* const av = GvAVn(gv); |
14befaf4 | 1065 | sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 | 1066 | SvREADONLY_on(av); |
cc4c2da6 NC |
1067 | goto magicalize; |
1068 | } | |
1069 | case '*': | |
cc4c2da6 NC |
1070 | case '#': |
1071 | if (sv_type == SVt_PV && ckWARN2(WARN_DEPRECATED, WARN_SYNTAX)) | |
1072 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), | |
8ae1fe26 RGS |
1073 | "$%c is no longer supported", *name); |
1074 | break; | |
cc4c2da6 | 1075 | case '|': |
c69033f2 | 1076 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 NC |
1077 | goto magicalize; |
1078 | ||
1079 | case '+': | |
1080 | { | |
9d4ba2ae | 1081 | AV* const av = GvAVn(gv); |
14befaf4 | 1082 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 | 1083 | SvREADONLY_on(av); |
cc4c2da6 | 1084 | /* FALL THROUGH */ |
e521374c | 1085 | } |
cc4c2da6 NC |
1086 | case '\023': /* $^S */ |
1087 | case '1': | |
1088 | case '2': | |
1089 | case '3': | |
1090 | case '4': | |
1091 | case '5': | |
1092 | case '6': | |
1093 | case '7': | |
1094 | case '8': | |
1095 | case '9': | |
1096 | ro_magicalize: | |
c69033f2 | 1097 | SvREADONLY_on(GvSVn(gv)); |
cc4c2da6 NC |
1098 | /* FALL THROUGH */ |
1099 | case '[': | |
1100 | case '^': | |
1101 | case '~': | |
1102 | case '=': | |
1103 | case '%': | |
1104 | case '.': | |
1105 | case '(': | |
1106 | case ')': | |
1107 | case '<': | |
1108 | case '>': | |
1109 | case ',': | |
1110 | case '\\': | |
1111 | case '/': | |
1112 | case '\001': /* $^A */ | |
1113 | case '\003': /* $^C */ | |
1114 | case '\004': /* $^D */ | |
1115 | case '\005': /* $^E */ | |
1116 | case '\006': /* $^F */ | |
1117 | case '\010': /* $^H */ | |
1118 | case '\011': /* $^I, NOT \t in EBCDIC */ | |
1119 | case '\016': /* $^N */ | |
1120 | case '\017': /* $^O */ | |
1121 | case '\020': /* $^P */ | |
1122 | case '\024': /* $^T */ | |
1123 | case '\027': /* $^W */ | |
1124 | magicalize: | |
c69033f2 | 1125 | sv_magic(GvSVn(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
cc4c2da6 | 1126 | break; |
e521374c | 1127 | |
cc4c2da6 | 1128 | case '\014': /* $^L */ |
c69033f2 NC |
1129 | sv_setpvn(GvSVn(gv),"\f",1); |
1130 | PL_formfeed = GvSVn(gv); | |
463ee0b2 | 1131 | break; |
cc4c2da6 | 1132 | case ';': |
c69033f2 | 1133 | sv_setpvn(GvSVn(gv),"\034",1); |
463ee0b2 | 1134 | break; |
cc4c2da6 NC |
1135 | case ']': |
1136 | { | |
c69033f2 | 1137 | SV * const sv = GvSVn(gv); |
d7aa5382 JP |
1138 | if (!sv_derived_from(PL_patchlevel, "version")) |
1139 | (void *)upg_version(PL_patchlevel); | |
7d54d38e SH |
1140 | GvSV(gv) = vnumify(PL_patchlevel); |
1141 | SvREADONLY_on(GvSV(gv)); | |
1142 | SvREFCNT_dec(sv); | |
93a17b20 LW |
1143 | } |
1144 | break; | |
cc4c2da6 NC |
1145 | case '\026': /* $^V */ |
1146 | { | |
c69033f2 | 1147 | SV * const sv = GvSVn(gv); |
f9be5ac8 DM |
1148 | GvSV(gv) = new_version(PL_patchlevel); |
1149 | SvREADONLY_on(GvSV(gv)); | |
1150 | SvREFCNT_dec(sv); | |
16070b82 GS |
1151 | } |
1152 | break; | |
cc4c2da6 | 1153 | } |
79072805 | 1154 | } |
93a17b20 | 1155 | return gv; |
79072805 LW |
1156 | } |
1157 | ||
1158 | void | |
35a4481c | 1159 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1160 | { |
35a4481c | 1161 | const char *name; |
7423f6db | 1162 | STRLEN namelen; |
35a4481c | 1163 | const HV * const hv = GvSTASH(gv); |
43693395 | 1164 | if (!hv) { |
0c34ef67 | 1165 | SvOK_off(sv); |
43693395 GS |
1166 | return; |
1167 | } | |
1168 | sv_setpv(sv, prefix ? prefix : ""); | |
a0288114 | 1169 | |
bfcb3514 | 1170 | name = HvNAME_get(hv); |
7423f6db NC |
1171 | if (name) { |
1172 | namelen = HvNAMELEN_get(hv); | |
1173 | } else { | |
e27ad1f2 | 1174 | name = "__ANON__"; |
7423f6db NC |
1175 | namelen = 8; |
1176 | } | |
a0288114 | 1177 | |
e27ad1f2 | 1178 | if (keepmain || strNE(name, "main")) { |
7423f6db | 1179 | sv_catpvn(sv,name,namelen); |
6a7a3232 | 1180 | sv_catpvn(sv,"::", 2); |
43693395 | 1181 | } |
257984c0 | 1182 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 GS |
1183 | } |
1184 | ||
1185 | void | |
35a4481c | 1186 | Perl_gv_fullname3(pTHX_ SV *sv, const GV *gv, const char *prefix) |
79072805 | 1187 | { |
84e79d79 | 1188 | gv_fullname4(sv, gv, prefix, TRUE); |
79072805 LW |
1189 | } |
1190 | ||
1191 | void | |
35a4481c | 1192 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1193 | { |
46c461b5 AL |
1194 | const GV * const egv = GvEGV(gv); |
1195 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); | |
43693395 GS |
1196 | } |
1197 | ||
1198 | void | |
35a4481c | 1199 | Perl_gv_efullname3(pTHX_ SV *sv, const GV *gv, const char *prefix) |
79072805 | 1200 | { |
84e79d79 | 1201 | gv_efullname4(sv, gv, prefix, TRUE); |
f6aff53a | 1202 | } |
1203 | ||
35a4481c | 1204 | /* compatibility with versions <= 5.003. */ |
f6aff53a | 1205 | void |
35a4481c | 1206 | Perl_gv_fullname(pTHX_ SV *sv, const GV *gv) |
f6aff53a | 1207 | { |
35a4481c | 1208 | gv_fullname3(sv, gv, sv == (const SV*)gv ? "*" : ""); |
f6aff53a | 1209 | } |
1210 | ||
35a4481c | 1211 | /* compatibility with versions <= 5.003. */ |
f6aff53a | 1212 | void |
35a4481c | 1213 | Perl_gv_efullname(pTHX_ SV *sv, const GV *gv) |
f6aff53a | 1214 | { |
e1ec3a88 | 1215 | gv_efullname3(sv, gv, sv == (const SV*)gv ? "*" : ""); |
79072805 LW |
1216 | } |
1217 | ||
1218 | IO * | |
864dbfa3 | 1219 | Perl_newIO(pTHX) |
79072805 | 1220 | { |
8990e307 | 1221 | GV *iogv; |
b7787f18 | 1222 | IO * const io = (IO*)NEWSV(0,0); |
8990e307 | 1223 | |
a0d0e21e | 1224 | sv_upgrade((SV *)io,SVt_PVIO); |
158623e7 NC |
1225 | /* This used to read SvREFCNT(io) = 1; |
1226 | It's not clear why the reference count needed an explicit reset. NWC | |
1227 | */ | |
1228 | assert (SvREFCNT(io) == 1); | |
8990e307 | 1229 | SvOBJECT_on(io); |
b464bac0 | 1230 | /* Clear the stashcache because a new IO could overrule a package name */ |
081fc587 | 1231 | hv_clear(PL_stashcache); |
c9de509e | 1232 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d GS |
1233 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1234 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) | |
c9de509e | 1235 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
b162af07 | 1236 | SvSTASH_set(io, (HV*)SvREFCNT_inc(GvHV(iogv))); |
79072805 LW |
1237 | return io; |
1238 | } | |
1239 | ||
1240 | void | |
864dbfa3 | 1241 | Perl_gv_check(pTHX_ HV *stash) |
79072805 | 1242 | { |
79072805 | 1243 | register I32 i; |
463ee0b2 | 1244 | |
8990e307 LW |
1245 | if (!HvARRAY(stash)) |
1246 | return; | |
a0d0e21e | 1247 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 1248 | const HE *entry; |
dc437b57 | 1249 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 AL |
1250 | register GV *gv; |
1251 | HV *hv; | |
dc437b57 | 1252 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
b862623f | 1253 | (gv = (GV*)HeVAL(entry)) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 1254 | { |
19b6c847 | 1255 | if (hv != PL_defstash && hv != stash) |
a0d0e21e LW |
1256 | gv_check(hv); /* nested package */ |
1257 | } | |
dc437b57 | 1258 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 | 1259 | const char *file; |
dc437b57 | 1260 | gv = (GV*)HeVAL(entry); |
55d729e4 | 1261 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 1262 | continue; |
1d7c1841 GS |
1263 | file = GvFILE(gv); |
1264 | /* performance hack: if filename is absolute and it's a standard | |
1265 | * module, don't bother warning */ | |
6eb630b7 | 1266 | #ifdef MACOS_TRADITIONAL |
551405c4 | 1267 | # define LIB_COMPONENT ":lib:" |
6eb630b7 | 1268 | #else |
551405c4 | 1269 | # define LIB_COMPONENT "/lib/" |
6eb630b7 | 1270 | #endif |
551405c4 AL |
1271 | if (file |
1272 | && PERL_FILE_IS_ABSOLUTE(file) | |
1273 | && (instr(file, LIB_COMPONENT) || instr(file, ".pm"))) | |
1d7c1841 | 1274 | { |
8990e307 | 1275 | continue; |
1d7c1841 GS |
1276 | } |
1277 | CopLINE_set(PL_curcop, GvLINE(gv)); | |
1278 | #ifdef USE_ITHREADS | |
dd374669 | 1279 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 GS |
1280 | #else |
1281 | CopFILEGV(PL_curcop) = gv_fetchfile(file); | |
1282 | #endif | |
9014280d | 1283 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 | 1284 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 | 1285 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 | 1286 | } |
79072805 LW |
1287 | } |
1288 | } | |
1289 | } | |
1290 | ||
1291 | GV * | |
e1ec3a88 | 1292 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 | 1293 | { |
cea2e8a9 | 1294 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c | 1295 | TRUE, SVt_PVGV); |
79072805 LW |
1296 | } |
1297 | ||
1298 | /* hopefully this is only called on local symbol table entries */ | |
1299 | ||
1300 | GP* | |
864dbfa3 | 1301 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 1302 | { |
1d7c1841 GS |
1303 | if (!gp) |
1304 | return (GP*)NULL; | |
79072805 | 1305 | gp->gp_refcnt++; |
44a8e56a | 1306 | if (gp->gp_cv) { |
1307 | if (gp->gp_cvgen) { | |
1308 | /* multi-named GPs cannot be used for method cache */ | |
1309 | SvREFCNT_dec(gp->gp_cv); | |
1310 | gp->gp_cv = Nullcv; | |
1311 | gp->gp_cvgen = 0; | |
1312 | } | |
1313 | else { | |
1314 | /* Adding a new name to a subroutine invalidates method cache */ | |
3280af22 | 1315 | PL_sub_generation++; |
44a8e56a | 1316 | } |
1317 | } | |
79072805 | 1318 | return gp; |
79072805 LW |
1319 | } |
1320 | ||
1321 | void | |
864dbfa3 | 1322 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 1323 | { |
79072805 LW |
1324 | GP* gp; |
1325 | ||
1326 | if (!gv || !(gp = GvGP(gv))) | |
1327 | return; | |
f248d071 GS |
1328 | if (gp->gp_refcnt == 0) { |
1329 | if (ckWARN_d(WARN_INTERNAL)) | |
9014280d | 1330 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
472d47bc SB |
1331 | "Attempt to free unreferenced glob pointers" |
1332 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
1333 | return; |
1334 | } | |
44a8e56a | 1335 | if (gp->gp_cv) { |
1336 | /* Deleting the name of a subroutine invalidates method cache */ | |
3280af22 | 1337 | PL_sub_generation++; |
44a8e56a | 1338 | } |
748a9306 LW |
1339 | if (--gp->gp_refcnt > 0) { |
1340 | if (gp->gp_egv == gv) | |
1341 | gp->gp_egv = 0; | |
79072805 | 1342 | return; |
748a9306 | 1343 | } |
79072805 | 1344 | |
13207a71 | 1345 | if (gp->gp_sv) SvREFCNT_dec(gp->gp_sv); |
8926f269 | 1346 | if (gp->gp_av) SvREFCNT_dec(gp->gp_av); |
bfcb3514 NC |
1347 | /* FIXME - another reference loop GV -> symtab -> GV ? |
1348 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
1349 | if (gp->gp_hv && SvTYPE(gp->gp_hv) == SVt_PVHV) { | |
bfcb3514 NC |
1350 | const char *hvname = HvNAME_get(gp->gp_hv); |
1351 | if (PL_stashcache && hvname) | |
7423f6db NC |
1352 | hv_delete(PL_stashcache, hvname, HvNAMELEN_get(gp->gp_hv), |
1353 | G_DISCARD); | |
bfcb3514 | 1354 | SvREFCNT_dec(gp->gp_hv); |
13207a71 JH |
1355 | } |
1356 | if (gp->gp_io) SvREFCNT_dec(gp->gp_io); | |
1357 | if (gp->gp_cv) SvREFCNT_dec(gp->gp_cv); | |
1358 | if (gp->gp_form) SvREFCNT_dec(gp->gp_form); | |
748a9306 | 1359 | |
79072805 LW |
1360 | Safefree(gp); |
1361 | GvGP(gv) = 0; | |
1362 | } | |
1363 | ||
d460ef45 NIS |
1364 | int |
1365 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
1366 | { | |
53c1dcc0 AL |
1367 | AMT * const amtp = (AMT*)mg->mg_ptr; |
1368 | PERL_UNUSED_ARG(sv); | |
dd374669 | 1369 | |
d460ef45 NIS |
1370 | if (amtp && AMT_AMAGIC(amtp)) { |
1371 | int i; | |
1372 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 1373 | CV * const cv = amtp->table[i]; |
d460ef45 NIS |
1374 | if (cv != Nullcv) { |
1375 | SvREFCNT_dec((SV *) cv); | |
1376 | amtp->table[i] = Nullcv; | |
1377 | } | |
1378 | } | |
1379 | } | |
1380 | return 0; | |
1381 | } | |
1382 | ||
a0d0e21e LW |
1383 | /* Updates and caches the CV's */ |
1384 | ||
1385 | bool | |
864dbfa3 | 1386 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e | 1387 | { |
53c1dcc0 AL |
1388 | MAGIC* const mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
1389 | AMT * const amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; | |
a6006777 | 1390 | AMT amt; |
a0d0e21e | 1391 | |
3280af22 NIS |
1392 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1393 | && amtp->was_ok_sub == PL_sub_generation) | |
eb160463 | 1394 | return (bool)AMT_OVERLOADED(amtp); |
14befaf4 | 1395 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e | 1396 | |
bfcb3514 | 1397 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 1398 | |
d460ef45 | 1399 | Zero(&amt,1,AMT); |
3280af22 NIS |
1400 | amt.was_ok_am = PL_amagic_generation; |
1401 | amt.was_ok_sub = PL_sub_generation; | |
a6006777 | 1402 | amt.fallback = AMGfallNO; |
1403 | amt.flags = 0; | |
1404 | ||
a6006777 | 1405 | { |
32251b26 IZ |
1406 | int filled = 0, have_ovl = 0; |
1407 | int i, lim = 1; | |
a6006777 | 1408 | |
22c35a8c | 1409 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 1410 | |
89ffc314 | 1411 | /* Try to find via inheritance. */ |
53c1dcc0 AL |
1412 | GV *gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1413 | SV * const sv = gv ? GvSV(gv) : NULL; | |
1414 | CV* cv; | |
89ffc314 IZ |
1415 | |
1416 | if (!gv) | |
32251b26 | 1417 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 NC |
1418 | #ifdef PERL_DONT_CREATE_GVSV |
1419 | else if (!sv) { | |
1420 | /* Equivalent to !SvTRUE and !SvOK */ | |
1421 | } | |
1422 | #endif | |
89ffc314 IZ |
1423 | else if (SvTRUE(sv)) |
1424 | amt.fallback=AMGfallYES; | |
1425 | else if (SvOK(sv)) | |
1426 | amt.fallback=AMGfallNEVER; | |
a6006777 | 1427 | |
32251b26 IZ |
1428 | for (i = 1; i < lim; i++) |
1429 | amt.table[i] = Nullcv; | |
1430 | for (; i < NofAMmeth; i++) { | |
e1ec3a88 | 1431 | const char *cooky = PL_AMG_names[i]; |
32251b26 | 1432 | /* Human-readable form, for debugging: */ |
e1ec3a88 AL |
1433 | const char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
1434 | const STRLEN l = strlen(cooky); | |
89ffc314 | 1435 | |
a0288114 | 1436 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 1437 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
1438 | /* don't fill the cache while looking up! |
1439 | Creation of inheritance stubs in intermediate packages may | |
1440 | conflict with the logic of runtime method substitution. | |
1441 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
1442 | then we could have created stubs for "(+0" in A and C too. | |
1443 | But if B overloads "bool", we may want to use it for | |
1444 | numifying instead of C's "+0". */ | |
1445 | if (i >= DESTROY_amg) | |
1446 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); | |
1447 | else /* Autoload taken care of below */ | |
1448 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); | |
46fc3d4c | 1449 | cv = 0; |
89ffc314 | 1450 | if (gv && (cv = GvCV(gv))) { |
bfcb3514 | 1451 | const char *hvname; |
44a8e56a | 1452 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
bfcb3514 | 1453 | && strEQ(hvname = HvNAME_get(GvSTASH(CvGV(cv))), "overload")) { |
611c1e95 IZ |
1454 | /* This is a hack to support autoloading..., while |
1455 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 1456 | /* GvSV contains the name of the method. */ |
4ea42e7f | 1457 | GV *ngv = Nullgv; |
c69033f2 | 1458 | SV *gvsv = GvSV(gv); |
a0288114 AL |
1459 | |
1460 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
1461 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
bfcb3514 | 1462 | GvSV(gv), cp, hvname) ); |
c69033f2 NC |
1463 | if (!gvsv || !SvPOK(gvsv) |
1464 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), | |
dc848c6f | 1465 | FALSE))) |
1466 | { | |
a0288114 | 1467 | /* Can be an import stub (created by "can"). */ |
c69033f2 | 1468 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; |
a0288114 AL |
1469 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ |
1470 | "in package \"%.256s\"", | |
35c1215d NC |
1471 | (GvCVGEN(gv) ? "Stub found while resolving" |
1472 | : "Can't resolve"), | |
bfcb3514 | 1473 | name, cp, hvname); |
44a8e56a | 1474 | } |
dc848c6f | 1475 | cv = GvCV(gv = ngv); |
44a8e56a | 1476 | } |
b464bac0 | 1477 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 1478 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 1479 | GvNAME(CvGV(cv))) ); |
1480 | filled = 1; | |
32251b26 IZ |
1481 | if (i < DESTROY_amg) |
1482 | have_ovl = 1; | |
611c1e95 IZ |
1483 | } else if (gv) { /* Autoloaded... */ |
1484 | cv = (CV*)gv; | |
1485 | filled = 1; | |
44a8e56a | 1486 | } |
a6006777 | 1487 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e | 1488 | } |
a0d0e21e | 1489 | if (filled) { |
a6006777 | 1490 | AMT_AMAGIC_on(&amt); |
32251b26 IZ |
1491 | if (have_ovl) |
1492 | AMT_OVERLOADED_on(&amt); | |
14befaf4 DM |
1493 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1494 | (char*)&amt, sizeof(AMT)); | |
32251b26 | 1495 | return have_ovl; |
a0d0e21e LW |
1496 | } |
1497 | } | |
a6006777 | 1498 | /* Here we have no table: */ |
9cbac4c7 | 1499 | /* no_table: */ |
a6006777 | 1500 | AMT_AMAGIC_off(&amt); |
14befaf4 DM |
1501 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1502 | (char*)&amt, sizeof(AMTS)); | |
a0d0e21e LW |
1503 | return FALSE; |
1504 | } | |
1505 | ||
32251b26 IZ |
1506 | |
1507 | CV* | |
1508 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
1509 | { | |
3f8f4626 | 1510 | MAGIC *mg; |
32251b26 IZ |
1511 | AMT *amtp; |
1512 | ||
bfcb3514 | 1513 | if (!stash || !HvNAME_get(stash)) |
3f8f4626 | 1514 | return Nullcv; |
14befaf4 | 1515 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
1516 | if (!mg) { |
1517 | do_update: | |
1518 | Gv_AMupdate(stash); | |
14befaf4 | 1519 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
1520 | } |
1521 | amtp = (AMT*)mg->mg_ptr; | |
1522 | if ( amtp->was_ok_am != PL_amagic_generation | |
1523 | || amtp->was_ok_sub != PL_sub_generation ) | |
1524 | goto do_update; | |
3ad83ce7 | 1525 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 1526 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
1527 | if (ret && isGV(ret)) { /* Autoloading stab */ |
1528 | /* Passing it through may have resulted in a warning | |
1529 | "Inherited AUTOLOAD for a non-method deprecated", since | |
1530 | our caller is going through a function call, not a method call. | |
1531 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 1532 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
1533 | |
1534 | if (gv && GvCV(gv)) | |
1535 | return GvCV(gv); | |
1536 | } | |
1537 | return ret; | |
1538 | } | |
a0288114 | 1539 | |
32251b26 IZ |
1540 | return Nullcv; |
1541 | } | |
1542 | ||
1543 | ||
a0d0e21e | 1544 | SV* |
864dbfa3 | 1545 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 1546 | { |
27da23d5 | 1547 | dVAR; |
b267980d | 1548 | MAGIC *mg; |
9c5ffd7c | 1549 | CV *cv=NULL; |
a0d0e21e | 1550 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 1551 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
1552 | int off = 0, off1, lr = 0, notfound = 0; |
1553 | int postpr = 0, force_cpy = 0; | |
1554 | int assign = AMGf_assign & flags; | |
1555 | const int assignshift = assign ? 1 : 0; | |
497b47a8 JH |
1556 | #ifdef DEBUGGING |
1557 | int fl=0; | |
497b47a8 | 1558 | #endif |
25716404 | 1559 | HV* stash=NULL; |
a0d0e21e | 1560 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 GS |
1561 | && (stash = SvSTASH(SvRV(left))) |
1562 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1563 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1564 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 | 1565 | : (CV **) NULL)) |
b267980d | 1566 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
1567 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1568 | * usual method */ | |
497b47a8 JH |
1569 | ( |
1570 | #ifdef DEBUGGING | |
1571 | fl = 1, | |
a0288114 | 1572 | #endif |
497b47a8 | 1573 | cv = cvp[off=method])))) { |
a0d0e21e LW |
1574 | lr = -1; /* Call method for left argument */ |
1575 | } else { | |
1576 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
1577 | int logic; | |
1578 | ||
1579 | /* look for substituted methods */ | |
ee239bfe | 1580 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
1581 | switch (method) { |
1582 | case inc_amg: | |
ee239bfe IZ |
1583 | force_cpy = 1; |
1584 | if ((cv = cvp[off=add_ass_amg]) | |
1585 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 1586 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1587 | } |
1588 | break; | |
1589 | case dec_amg: | |
ee239bfe IZ |
1590 | force_cpy = 1; |
1591 | if ((cv = cvp[off = subtr_ass_amg]) | |
1592 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 1593 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1594 | } |
1595 | break; | |
1596 | case bool__amg: | |
1597 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
1598 | break; | |
1599 | case numer_amg: | |
1600 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
1601 | break; | |
1602 | case string_amg: | |
1603 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
1604 | break; | |
b7787f18 AL |
1605 | case not_amg: |
1606 | (void)((cv = cvp[off=bool__amg]) | |
1607 | || (cv = cvp[off=numer_amg]) | |
1608 | || (cv = cvp[off=string_amg])); | |
1609 | postpr = 1; | |
1610 | break; | |
748a9306 LW |
1611 | case copy_amg: |
1612 | { | |
76e3520e GS |
1613 | /* |
1614 | * SV* ref causes confusion with the interpreter variable of | |
1615 | * the same name | |
1616 | */ | |
890ce7af | 1617 | SV* const tmpRef=SvRV(left); |
76e3520e | 1618 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 1619 | /* |
1620 | * Just to be extra cautious. Maybe in some | |
1621 | * additional cases sv_setsv is safe, too. | |
1622 | */ | |
890ce7af | 1623 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 1624 | SvOBJECT_on(newref); |
b162af07 | 1625 | SvSTASH_set(newref, (HV*)SvREFCNT_inc(SvSTASH(tmpRef))); |
748a9306 LW |
1626 | return newref; |
1627 | } | |
1628 | } | |
1629 | break; | |
a0d0e21e | 1630 | case abs_amg: |
b267980d | 1631 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 1632 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 1633 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 1634 | if (off1==lt_amg) { |
890ce7af | 1635 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1636 | lt_amg,AMGf_noright); |
1637 | logic = SvTRUE(lessp); | |
1638 | } else { | |
890ce7af | 1639 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1640 | ncmp_amg,AMGf_noright); |
1641 | logic = (SvNV(lessp) < 0); | |
1642 | } | |
1643 | if (logic) { | |
1644 | if (off==subtr_amg) { | |
1645 | right = left; | |
748a9306 | 1646 | left = nullsv; |
a0d0e21e LW |
1647 | lr = 1; |
1648 | } | |
1649 | } else { | |
1650 | return left; | |
1651 | } | |
1652 | } | |
1653 | break; | |
1654 | case neg_amg: | |
155aba94 | 1655 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
1656 | right = left; |
1657 | left = sv_2mortal(newSViv(0)); | |
1658 | lr = 1; | |
1659 | } | |
1660 | break; | |
f216259d | 1661 | case int_amg: |
f5284f61 | 1662 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d NIS |
1663 | /* FAIL safe */ |
1664 | return NULL; /* Delegate operation to standard mechanisms. */ | |
1665 | break; | |
f5284f61 IZ |
1666 | case to_sv_amg: |
1667 | case to_av_amg: | |
1668 | case to_hv_amg: | |
1669 | case to_gv_amg: | |
1670 | case to_cv_amg: | |
1671 | /* FAIL safe */ | |
b267980d | 1672 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 | 1673 | break; |
a0d0e21e LW |
1674 | default: |
1675 | goto not_found; | |
1676 | } | |
1677 | if (!cv) goto not_found; | |
1678 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
25716404 GS |
1679 | && (stash = SvSTASH(SvRV(right))) |
1680 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1681 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1682 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 | 1683 | : (CV **) NULL)) |
a0d0e21e LW |
1684 | && (cv = cvp[off=method])) { /* Method for right |
1685 | * argument found */ | |
1686 | lr=1; | |
b267980d NIS |
1687 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1688 | && (cvp=ocvp) && (lr = -1)) | |
a0d0e21e LW |
1689 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1690 | && !(flags & AMGf_unary)) { | |
1691 | /* We look for substitution for | |
1692 | * comparison operations and | |
fc36a67e | 1693 | * concatenation */ |
a0d0e21e LW |
1694 | if (method==concat_amg || method==concat_ass_amg |
1695 | || method==repeat_amg || method==repeat_ass_amg) { | |
1696 | return NULL; /* Delegate operation to string conversion */ | |
1697 | } | |
1698 | off = -1; | |
1699 | switch (method) { | |
1700 | case lt_amg: | |
1701 | case le_amg: | |
1702 | case gt_amg: | |
1703 | case ge_amg: | |
1704 | case eq_amg: | |
1705 | case ne_amg: | |
1706 | postpr = 1; off=ncmp_amg; break; | |
1707 | case slt_amg: | |
1708 | case sle_amg: | |
1709 | case sgt_amg: | |
1710 | case sge_amg: | |
1711 | case seq_amg: | |
1712 | case sne_amg: | |
1713 | postpr = 1; off=scmp_amg; break; | |
1714 | } | |
1715 | if (off != -1) cv = cvp[off]; | |
1716 | if (!cv) { | |
1717 | goto not_found; | |
1718 | } | |
1719 | } else { | |
a6006777 | 1720 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
1721 | switch (method) { |
1722 | case to_sv_amg: | |
1723 | case to_av_amg: | |
1724 | case to_hv_amg: | |
1725 | case to_gv_amg: | |
1726 | case to_cv_amg: | |
1727 | /* FAIL safe */ | |
1728 | return left; /* Delegate operation to standard mechanisms. */ | |
1729 | break; | |
1730 | } | |
a0d0e21e LW |
1731 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1732 | notfound = 1; lr = -1; | |
1733 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
1734 | notfound = 1; lr = 1; | |
1735 | } else { | |
46fc3d4c | 1736 | SV *msg; |
774d564b | 1737 | if (off==-1) off=method; |
b267980d | 1738 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 | 1739 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 | 1740 | AMG_id2name(method + assignshift), |
e7ea3e70 | 1741 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d | 1742 | SvAMAGIC(left)? |
a0d0e21e LW |
1743 | "in overloaded package ": |
1744 | "has no overloaded magic", | |
b267980d | 1745 | SvAMAGIC(left)? |
bfcb3514 | 1746 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e | 1747 | "", |
b267980d | 1748 | SvAMAGIC(right)? |
e7ea3e70 | 1749 | ",\n\tright argument in overloaded package ": |
b267980d | 1750 | (flags & AMGf_unary |
e7ea3e70 IZ |
1751 | ? "" |
1752 | : ",\n\tright argument has no overloaded magic"), | |
b267980d | 1753 | SvAMAGIC(right)? |
bfcb3514 | 1754 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c | 1755 | "")); |
a0d0e21e | 1756 | if (amtp && amtp->fallback >= AMGfallYES) { |
b15aece3 | 1757 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e | 1758 | } else { |
894356b3 | 1759 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e LW |
1760 | } |
1761 | return NULL; | |
1762 | } | |
ee239bfe | 1763 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
1764 | } |
1765 | } | |
497b47a8 | 1766 | #ifdef DEBUGGING |
a0d0e21e | 1767 | if (!notfound) { |
497b47a8 | 1768 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 | 1769 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 JH |
1770 | AMG_id2name(off), |
1771 | method+assignshift==off? "" : | |
a0288114 | 1772 | " (initially \"", |
497b47a8 JH |
1773 | method+assignshift==off? "" : |
1774 | AMG_id2name(method+assignshift), | |
a0288114 | 1775 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
1776 | flags & AMGf_unary? "" : |
1777 | lr==1 ? " for right argument": " for left argument", | |
1778 | flags & AMGf_unary? " for argument" : "", | |
bfcb3514 | 1779 | stash ? HvNAME_get(stash) : "null", |
497b47a8 | 1780 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 1781 | } |
497b47a8 | 1782 | #endif |
748a9306 LW |
1783 | /* Since we use shallow copy during assignment, we need |
1784 | * to dublicate the contents, probably calling user-supplied | |
1785 | * version of copy operator | |
1786 | */ | |
ee239bfe IZ |
1787 | /* We need to copy in following cases: |
1788 | * a) Assignment form was called. | |
1789 | * assignshift==1, assign==T, method + 1 == off | |
1790 | * b) Increment or decrement, called directly. | |
1791 | * assignshift==0, assign==0, method + 0 == off | |
1792 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 1793 | * assignshift==0, assign==T, |
ee239bfe IZ |
1794 | * force_cpy == T |
1795 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 1796 | * assignshift==0, assign==0, |
ee239bfe IZ |
1797 | * force_cpy == T |
1798 | * e) Assignment form translated to nomethod. | |
1799 | * assignshift==1, assign==T, method + 1 != off | |
1800 | * force_cpy == T | |
1801 | */ | |
1802 | /* off is method, method+assignshift, or a result of opcode substitution. | |
1803 | * In the latter case assignshift==0, so only notfound case is important. | |
1804 | */ | |
1805 | if (( (method + assignshift == off) | |
1806 | && (assign || (method == inc_amg) || (method == dec_amg))) | |
1807 | || force_cpy) | |
1808 | RvDEEPCP(left); | |
a0d0e21e LW |
1809 | { |
1810 | dSP; | |
1811 | BINOP myop; | |
1812 | SV* res; | |
b7787f18 | 1813 | const bool oldcatch = CATCH_GET; |
a0d0e21e | 1814 | |
54310121 | 1815 | CATCH_SET(TRUE); |
a0d0e21e LW |
1816 | Zero(&myop, 1, BINOP); |
1817 | myop.op_last = (OP *) &myop; | |
1818 | myop.op_next = Nullop; | |
54310121 | 1819 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e | 1820 | |
e788e7d3 | 1821 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 1822 | ENTER; |
462e5cf6 | 1823 | SAVEOP(); |
533c011a | 1824 | PL_op = (OP *) &myop; |
3280af22 | 1825 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 1826 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 1827 | PUTBACK; |
cea2e8a9 | 1828 | pp_pushmark(); |
a0d0e21e | 1829 | |
924508f0 | 1830 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
1831 | PUSHs(lr>0? right: left); |
1832 | PUSHs(lr>0? left: right); | |
3280af22 | 1833 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 1834 | if (notfound) { |
89ffc314 | 1835 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e LW |
1836 | } |
1837 | PUSHs((SV*)cv); | |
1838 | PUTBACK; | |
1839 | ||
155aba94 | 1840 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 | 1841 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
1842 | LEAVE; |
1843 | SPAGAIN; | |
1844 | ||
1845 | res=POPs; | |
ebafeae7 | 1846 | PUTBACK; |
d3acc0f7 | 1847 | POPSTACK; |
54310121 | 1848 | CATCH_SET(oldcatch); |
a0d0e21e | 1849 | |
a0d0e21e | 1850 | if (postpr) { |
b7787f18 | 1851 | int ans; |
a0d0e21e LW |
1852 | switch (method) { |
1853 | case le_amg: | |
1854 | case sle_amg: | |
1855 | ans=SvIV(res)<=0; break; | |
1856 | case lt_amg: | |
1857 | case slt_amg: | |
1858 | ans=SvIV(res)<0; break; | |
1859 | case ge_amg: | |
1860 | case sge_amg: | |
1861 | ans=SvIV(res)>=0; break; | |
1862 | case gt_amg: | |
1863 | case sgt_amg: | |
1864 | ans=SvIV(res)>0; break; | |
1865 | case eq_amg: | |
1866 | case seq_amg: | |
1867 | ans=SvIV(res)==0; break; | |
1868 | case ne_amg: | |
1869 | case sne_amg: | |
1870 | ans=SvIV(res)!=0; break; | |
1871 | case inc_amg: | |
1872 | case dec_amg: | |
bbce6d69 | 1873 | SvSetSV(left,res); return left; |
dc437b57 | 1874 | case not_amg: |
fe7ac86a | 1875 | ans=!SvTRUE(res); break; |
b7787f18 AL |
1876 | default: |
1877 | ans=0; break; | |
a0d0e21e | 1878 | } |
54310121 | 1879 | return boolSV(ans); |
748a9306 LW |
1880 | } else if (method==copy_amg) { |
1881 | if (!SvROK(res)) { | |
cea2e8a9 | 1882 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
1883 | } |
1884 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
1885 | } else { |
1886 | return res; | |
1887 | } | |
1888 | } | |
1889 | } | |
c9d5ac95 GS |
1890 | |
1891 | /* | |
7fc63493 | 1892 | =for apidoc is_gv_magical_sv |
c9d5ac95 | 1893 | |
7a5fd60d NC |
1894 | Returns C<TRUE> if given the name of a magical GV. Calls is_gv_magical. |
1895 | ||
1896 | =cut | |
1897 | */ | |
1898 | ||
1899 | bool | |
1900 | Perl_is_gv_magical_sv(pTHX_ SV *name, U32 flags) | |
1901 | { | |
1902 | STRLEN len; | |
b64e5050 | 1903 | const char * const temp = SvPV_const(name, len); |
7a5fd60d NC |
1904 | return is_gv_magical(temp, len, flags); |
1905 | } | |
1906 | ||
1907 | /* | |
1908 | =for apidoc is_gv_magical | |
1909 | ||
c9d5ac95 GS |
1910 | Returns C<TRUE> if given the name of a magical GV. |
1911 | ||
1912 | Currently only useful internally when determining if a GV should be | |
1913 | created even in rvalue contexts. | |
1914 | ||
1915 | C<flags> is not used at present but available for future extension to | |
1916 | allow selecting particular classes of magical variable. | |
1917 | ||
b9b0e72c NC |
1918 | Currently assumes that C<name> is NUL terminated (as well as len being valid). |
1919 | This assumption is met by all callers within the perl core, which all pass | |
1920 | pointers returned by SvPV. | |
1921 | ||
c9d5ac95 GS |
1922 | =cut |
1923 | */ | |
1924 | bool | |
7fc63493 | 1925 | Perl_is_gv_magical(pTHX_ const char *name, STRLEN len, U32 flags) |
c9d5ac95 | 1926 | { |
9d4ba2ae AL |
1927 | PERL_UNUSED_ARG(flags); |
1928 | ||
b9b0e72c | 1929 | if (len > 1) { |
b464bac0 | 1930 | const char * const name1 = name + 1; |
b9b0e72c NC |
1931 | switch (*name) { |
1932 | case 'I': | |
9431620d | 1933 | if (len == 3 && name1[1] == 'S' && name[2] == 'A') |
b9b0e72c NC |
1934 | goto yes; |
1935 | break; | |
1936 | case 'O': | |
9431620d | 1937 | if (len == 8 && strEQ(name1, "VERLOAD")) |
b9b0e72c NC |
1938 | goto yes; |
1939 | break; | |
1940 | case 'S': | |
9431620d | 1941 | if (len == 3 && name[1] == 'I' && name[2] == 'G') |
b9b0e72c NC |
1942 | goto yes; |
1943 | break; | |
1944 | /* Using ${^...} variables is likely to be sufficiently rare that | |
1945 | it seems sensible to avoid the space hit of also checking the | |
1946 | length. */ | |
1947 | case '\017': /* ${^OPEN} */ | |
9431620d | 1948 | if (strEQ(name1, "PEN")) |
b9b0e72c NC |
1949 | goto yes; |
1950 | break; | |
1951 | case '\024': /* ${^TAINT} */ | |
9431620d | 1952 | if (strEQ(name1, "AINT")) |
b9b0e72c NC |
1953 | goto yes; |
1954 | break; | |
1955 | case '\025': /* ${^UNICODE} */ | |
9431620d | 1956 | if (strEQ(name1, "NICODE")) |
b9b0e72c | 1957 | goto yes; |
a0288114 | 1958 | if (strEQ(name1, "TF8LOCALE")) |
7cebcbc0 | 1959 | goto yes; |
b9b0e72c NC |
1960 | break; |
1961 | case '\027': /* ${^WARNING_BITS} */ | |
9431620d | 1962 | if (strEQ(name1, "ARNING_BITS")) |
b9b0e72c NC |
1963 | goto yes; |
1964 | break; | |
1965 | case '1': | |
1966 | case '2': | |
1967 | case '3': | |
1968 | case '4': | |
1969 | case '5': | |
1970 | case '6': | |
1971 | case '7': | |
1972 | case '8': | |
1973 | case '9': | |
c9d5ac95 | 1974 | { |
7fc63493 | 1975 | const char *end = name + len; |
c9d5ac95 GS |
1976 | while (--end > name) { |
1977 | if (!isDIGIT(*end)) | |
1978 | return FALSE; | |
1979 | } | |
b9b0e72c NC |
1980 | goto yes; |
1981 | } | |
1982 | } | |
1983 | } else { | |
1984 | /* Because we're already assuming that name is NUL terminated | |
1985 | below, we can treat an empty name as "\0" */ | |
1986 | switch (*name) { | |
1987 | case '&': | |
1988 | case '`': | |
1989 | case '\'': | |
1990 | case ':': | |
1991 | case '?': | |
1992 | case '!': | |
1993 | case '-': | |
1994 | case '#': | |
1995 | case '[': | |
1996 | case '^': | |
1997 | case '~': | |
1998 | case '=': | |
1999 | case '%': | |
2000 | case '.': | |
2001 | case '(': | |
2002 | case ')': | |
2003 | case '<': | |
2004 | case '>': | |
2005 | case ',': | |
2006 | case '\\': | |
2007 | case '/': | |
2008 | case '|': | |
2009 | case '+': | |
2010 | case ';': | |
2011 | case ']': | |
2012 | case '\001': /* $^A */ | |
2013 | case '\003': /* $^C */ | |
2014 | case '\004': /* $^D */ | |
2015 | case '\005': /* $^E */ | |
2016 | case '\006': /* $^F */ | |
2017 | case '\010': /* $^H */ | |
2018 | case '\011': /* $^I, NOT \t in EBCDIC */ | |
2019 | case '\014': /* $^L */ | |
2020 | case '\016': /* $^N */ | |
2021 | case '\017': /* $^O */ | |
2022 | case '\020': /* $^P */ | |
2023 | case '\023': /* $^S */ | |
2024 | case '\024': /* $^T */ | |
2025 | case '\026': /* $^V */ | |
2026 | case '\027': /* $^W */ | |
2027 | case '1': | |
2028 | case '2': | |
2029 | case '3': | |
2030 | case '4': | |
2031 | case '5': | |
2032 | case '6': | |
2033 | case '7': | |
2034 | case '8': | |
2035 | case '9': | |
2036 | yes: | |
2037 | return TRUE; | |
2038 | default: | |
2039 | break; | |
c9d5ac95 | 2040 | } |
c9d5ac95 GS |
2041 | } |
2042 | return FALSE; | |
2043 | } | |
66610fdd RGS |
2044 | |
2045 | /* | |
2046 | * Local variables: | |
2047 | * c-indentation-style: bsd | |
2048 | * c-basic-offset: 4 | |
2049 | * indent-tabs-mode: t | |
2050 | * End: | |
2051 | * | |
37442d52 RGS |
2052 | * ex: set ts=8 sts=4 sw=4 noet: |
2053 | */ |