Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
bc89e66f |
3 | * Copyright (c) 1991-2001, Larry Wall |
79072805 |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
7 | * |
a0d0e21e |
8 | */ |
9 | |
10 | /* |
11 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure |
12 | * of your inquisitiveness, I shall spend all the rest of my days answering |
13 | * you. What more do you want to know?' |
14 | * 'The names of all the stars, and of all living things, and the whole |
15 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' |
16 | * laughed Pippin. |
79072805 |
17 | */ |
18 | |
19 | #include "EXTERN.h" |
864dbfa3 |
20 | #define PERL_IN_GV_C |
79072805 |
21 | #include "perl.h" |
22 | |
23 | GV * |
864dbfa3 |
24 | Perl_gv_AVadd(pTHX_ register GV *gv) |
79072805 |
25 | { |
a0d0e21e |
26 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
27 | Perl_croak(aTHX_ "Bad symbol for array"); |
79072805 |
28 | if (!GvAV(gv)) |
29 | GvAV(gv) = newAV(); |
30 | return gv; |
31 | } |
32 | |
33 | GV * |
864dbfa3 |
34 | Perl_gv_HVadd(pTHX_ register GV *gv) |
79072805 |
35 | { |
a0d0e21e |
36 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
37 | Perl_croak(aTHX_ "Bad symbol for hash"); |
79072805 |
38 | if (!GvHV(gv)) |
463ee0b2 |
39 | GvHV(gv) = newHV(); |
79072805 |
40 | return gv; |
41 | } |
42 | |
43 | GV * |
864dbfa3 |
44 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e |
45 | { |
46 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
47 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
5bd07a3d |
48 | if (!GvIOp(gv)) { |
49 | #ifdef GV_SHARED_CHECK |
50 | if (GvSHARED(gv)) { |
51 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is shared)"); |
52 | } |
53 | #endif |
a0d0e21e |
54 | GvIOp(gv) = newIO(); |
5bd07a3d |
55 | } |
a0d0e21e |
56 | return gv; |
57 | } |
58 | |
59 | GV * |
864dbfa3 |
60 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
61 | { |
eacec437 |
62 | char smallbuf[256]; |
53d95988 |
63 | char *tmpbuf; |
8ebc5c01 |
64 | STRLEN tmplen; |
79072805 |
65 | GV *gv; |
66 | |
1d7c1841 |
67 | if (!PL_defstash) |
68 | return Nullgv; |
69 | |
53d95988 |
70 | tmplen = strlen(name) + 2; |
71 | if (tmplen < sizeof smallbuf) |
72 | tmpbuf = smallbuf; |
73 | else |
74 | New(603, tmpbuf, tmplen + 1, char); |
75 | tmpbuf[0] = '_'; |
76 | tmpbuf[1] = '<'; |
77 | strcpy(tmpbuf + 2, name); |
3280af22 |
78 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
79 | if (!isGV(gv)) { |
3280af22 |
80 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
1d7c1841 |
81 | sv_setpv(GvSV(gv), name); |
82 | if (PERLDB_LINE) |
14befaf4 |
83 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile); |
1d7c1841 |
84 | } |
53d95988 |
85 | if (tmpbuf != smallbuf) |
86 | Safefree(tmpbuf); |
79072805 |
87 | return gv; |
88 | } |
89 | |
463ee0b2 |
90 | void |
864dbfa3 |
91 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
92 | { |
93 | register GP *gp; |
55d729e4 |
94 | bool doproto = SvTYPE(gv) > SVt_NULL; |
95 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
463ee0b2 |
96 | |
dc437b57 |
97 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
98 | if (SvLEN(gv)) { |
99 | if (proto) { |
100 | SvPVX(gv) = NULL; |
101 | SvLEN(gv) = 0; |
102 | SvPOK_off(gv); |
103 | } else |
104 | Safefree(SvPVX(gv)); |
105 | } |
44a8e56a |
106 | Newz(602, gp, 1, GP); |
8990e307 |
107 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
108 | GvSV(gv) = NEWSV(72,0); |
1d7c1841 |
109 | GvLINE(gv) = CopLINE(PL_curcop); |
110 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; |
005a453c |
111 | GvCVGEN(gv) = 0; |
463ee0b2 |
112 | GvEGV(gv) = gv; |
14befaf4 |
113 | sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0); |
85aff577 |
114 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e |
115 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
116 | GvNAMELEN(gv) = len; |
23ad5bf5 |
117 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
118 | GvMULTI_on(gv); |
55d729e4 |
119 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
120 | SvIOK_off(gv); |
55d729e4 |
121 | ENTER; |
b099ddc0 |
122 | /* XXX unsafe for threads if eval_owner isn't held */ |
55d729e4 |
123 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 |
124 | GvCV(gv) = PL_compcv; |
55d729e4 |
125 | LEAVE; |
126 | |
3280af22 |
127 | PL_sub_generation++; |
65c50114 |
128 | CvGV(GvCV(gv)) = gv; |
1d7c1841 |
129 | CvFILE(GvCV(gv)) = CopFILE(PL_curcop); |
3280af22 |
130 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
131 | #ifdef USE_THREADS |
132 | CvOWNER(GvCV(gv)) = 0; |
1cfa4ec7 |
133 | if (!CvMUTEXP(GvCV(gv))) { |
b0a484d2 |
134 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
1cfa4ec7 |
135 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
136 | } |
55d729e4 |
137 | #endif /* USE_THREADS */ |
138 | if (proto) { |
139 | sv_setpv((SV*)GvCV(gv), proto); |
140 | Safefree(proto); |
141 | } |
142 | } |
463ee0b2 |
143 | } |
144 | |
76e3520e |
145 | STATIC void |
cea2e8a9 |
146 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
147 | { |
148 | switch (sv_type) { |
149 | case SVt_PVIO: |
150 | (void)GvIOn(gv); |
151 | break; |
152 | case SVt_PVAV: |
153 | (void)GvAVn(gv); |
154 | break; |
155 | case SVt_PVHV: |
156 | (void)GvHVn(gv); |
157 | break; |
158 | } |
159 | } |
160 | |
954c1994 |
161 | /* |
162 | =for apidoc gv_fetchmeth |
163 | |
164 | Returns the glob with the given C<name> and a defined subroutine or |
165 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
166 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
167 | |
168 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
169 | side-effect creates a glob with the given C<name> in the given C<stash> |
170 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
171 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
172 | |
173 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
174 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
175 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
176 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
177 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
178 | |
179 | =cut |
180 | */ |
181 | |
79072805 |
182 | GV * |
864dbfa3 |
183 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
184 | { |
185 | AV* av; |
463ee0b2 |
186 | GV* topgv; |
79072805 |
187 | GV* gv; |
463ee0b2 |
188 | GV** gvp; |
748a9306 |
189 | CV* cv; |
a0d0e21e |
190 | |
af09ea45 |
191 | /* UNIVERSAL methods should be callable without a stash */ |
192 | if (!stash) { |
193 | level = -1; /* probably appropriate */ |
194 | if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE))) |
195 | return 0; |
196 | } |
197 | |
1db89ea5 |
198 | if (!HvNAME(stash)) |
199 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
44a8e56a |
200 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
201 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
3e0ccd42 |
202 | name, HvNAME(stash)); |
463ee0b2 |
203 | |
cea2e8a9 |
204 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
205 | |
206 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
207 | if (!gvp) |
208 | topgv = Nullgv; |
209 | else { |
210 | topgv = *gvp; |
211 | if (SvTYPE(topgv) != SVt_PVGV) |
212 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
213 | if ((cv = GvCV(topgv))) { |
44a8e56a |
214 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
215 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
216 | return topgv; |
44a8e56a |
217 | /* Stale cached entry: junk it */ |
218 | SvREFCNT_dec(cv); |
219 | GvCV(topgv) = cv = Nullcv; |
220 | GvCVGEN(topgv) = 0; |
748a9306 |
221 | } |
3280af22 |
222 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
223 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
224 | } |
79072805 |
225 | |
9607fc9c |
226 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
227 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
228 | |
fb73857a |
229 | /* create and re-create @.*::SUPER::ISA on demand */ |
230 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
231 | char* packname = HvNAME(stash); |
232 | STRLEN packlen = strlen(packname); |
233 | |
234 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
235 | HV* basestash; |
236 | |
237 | packlen -= 7; |
238 | basestash = gv_stashpvn(packname, packlen, TRUE); |
239 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
240 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
9607fc9c |
241 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
242 | if (!gvp || !(gv = *gvp)) |
cea2e8a9 |
243 | Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); |
9607fc9c |
244 | if (SvTYPE(gv) != SVt_PVGV) |
245 | gv_init(gv, stash, "ISA", 3, TRUE); |
246 | SvREFCNT_dec(GvAV(gv)); |
247 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
248 | } |
249 | } |
250 | } |
251 | |
252 | if (av) { |
79072805 |
253 | SV** svp = AvARRAY(av); |
93965878 |
254 | /* NOTE: No support for tied ISA */ |
255 | I32 items = AvFILLp(av) + 1; |
79072805 |
256 | while (items--) { |
79072805 |
257 | SV* sv = *svp++; |
a0d0e21e |
258 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
259 | if (!basestash) { |
599cee73 |
260 | if (ckWARN(WARN_MISC)) |
cea2e8a9 |
261 | Perl_warner(aTHX_ WARN_MISC, "Can't locate package %s for @%s::ISA", |
463ee0b2 |
262 | SvPVX(sv), HvNAME(stash)); |
79072805 |
263 | continue; |
264 | } |
44a8e56a |
265 | gv = gv_fetchmeth(basestash, name, len, |
266 | (level >= 0) ? level + 1 : level - 1); |
267 | if (gv) |
268 | goto gotcha; |
79072805 |
269 | } |
270 | } |
a0d0e21e |
271 | |
9607fc9c |
272 | /* if at top level, try UNIVERSAL */ |
273 | |
44a8e56a |
274 | if (level == 0 || level == -1) { |
9607fc9c |
275 | HV* lastchance; |
276 | |
155aba94 |
277 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
278 | if ((gv = gv_fetchmeth(lastchance, name, len, |
279 | (level >= 0) ? level + 1 : level - 1))) |
280 | { |
44a8e56a |
281 | gotcha: |
dc848c6f |
282 | /* |
283 | * Cache method in topgv if: |
284 | * 1. topgv has no synonyms (else inheritance crosses wires) |
285 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
286 | */ |
287 | if (topgv && |
288 | GvREFCNT(topgv) == 1 && |
289 | (cv = GvCV(gv)) && |
290 | (CvROOT(cv) || CvXSUB(cv))) |
291 | { |
155aba94 |
292 | if ((cv = GvCV(topgv))) |
44a8e56a |
293 | SvREFCNT_dec(cv); |
294 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
295 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
296 | } |
a0d0e21e |
297 | return gv; |
298 | } |
005a453c |
299 | else if (topgv && GvREFCNT(topgv) == 1) { |
300 | /* cache the fact that the method is not defined */ |
3280af22 |
301 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
302 | } |
a0d0e21e |
303 | } |
304 | } |
305 | |
79072805 |
306 | return 0; |
307 | } |
308 | |
954c1994 |
309 | /* |
310 | =for apidoc gv_fetchmethod |
311 | |
6d0f518e |
312 | See L<gv_fetchmethod_autoload>. |
954c1994 |
313 | |
314 | =cut |
315 | */ |
316 | |
79072805 |
317 | GV * |
864dbfa3 |
318 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
463ee0b2 |
319 | { |
dc848c6f |
320 | return gv_fetchmethod_autoload(stash, name, TRUE); |
321 | } |
322 | |
954c1994 |
323 | /* |
324 | =for apidoc gv_fetchmethod_autoload |
325 | |
326 | Returns the glob which contains the subroutine to call to invoke the method |
327 | on the C<stash>. In fact in the presence of autoloading this may be the |
328 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
329 | already setup. |
954c1994 |
330 | |
331 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
332 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
333 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
334 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
335 | with a non-zero C<autoload> parameter. |
954c1994 |
336 | |
337 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
338 | that if you want to keep the returned glob for a long time, you need to |
339 | check for it being "AUTOLOAD", since at the later time the call may load a |
340 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
341 | created via a side effect to do this. |
954c1994 |
342 | |
343 | These functions have the same side-effects and as C<gv_fetchmeth> with |
344 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
345 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
346 | C<call_sv> apply equally to these functions. |
954c1994 |
347 | |
348 | =cut |
349 | */ |
350 | |
dc848c6f |
351 | GV * |
864dbfa3 |
352 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
353 | { |
08105a92 |
354 | register const char *nend; |
355 | const char *nsplit = 0; |
a0d0e21e |
356 | GV* gv; |
b267980d |
357 | |
463ee0b2 |
358 | for (nend = name; *nend; nend++) { |
9607fc9c |
359 | if (*nend == '\'') |
a0d0e21e |
360 | nsplit = nend; |
9607fc9c |
361 | else if (*nend == ':' && *(nend + 1) == ':') |
362 | nsplit = ++nend; |
a0d0e21e |
363 | } |
364 | if (nsplit) { |
08105a92 |
365 | const char *origname = name; |
a0d0e21e |
366 | name = nsplit + 1; |
a0d0e21e |
367 | if (*nsplit == ':') |
368 | --nsplit; |
9607fc9c |
369 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
370 | /* ->SUPER::method should really be looked up in original stash */ |
cea2e8a9 |
371 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
372 | CopSTASHPV(PL_curcop))); |
af09ea45 |
373 | /* __PACKAGE__::SUPER stash should be autovivified */ |
9607fc9c |
374 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
375 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
9607fc9c |
376 | origname, HvNAME(stash), name) ); |
4633a7c4 |
377 | } |
9607fc9c |
378 | else |
af09ea45 |
379 | /* don't autovifify if ->NoSuchStash::method */ |
380 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); |
4633a7c4 |
381 | } |
382 | |
9607fc9c |
383 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
384 | if (!gv) { |
2f6e0fe7 |
385 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
386 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
387 | else if (autoload) |
54310121 |
388 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
389 | } |
dc848c6f |
390 | else if (autoload) { |
391 | CV* cv = GvCV(gv); |
09280a33 |
392 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
393 | GV* stubgv; |
394 | GV* autogv; |
395 | |
396 | if (CvANON(cv)) |
397 | stubgv = gv; |
398 | else { |
399 | stubgv = CvGV(cv); |
400 | if (GvCV(stubgv) != cv) /* orphaned import */ |
401 | stubgv = gv; |
402 | } |
403 | autogv = gv_autoload4(GvSTASH(stubgv), |
404 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
405 | if (autogv) |
406 | gv = autogv; |
407 | } |
408 | } |
44a8e56a |
409 | |
410 | return gv; |
411 | } |
412 | |
413 | GV* |
864dbfa3 |
414 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
415 | { |
416 | static char autoload[] = "AUTOLOAD"; |
417 | static STRLEN autolen = 8; |
418 | GV* gv; |
419 | CV* cv; |
420 | HV* varstash; |
421 | GV* vargv; |
422 | SV* varsv; |
423 | |
af09ea45 |
424 | if (!stash) |
425 | return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
44a8e56a |
426 | if (len == autolen && strnEQ(name, autoload, autolen)) |
427 | return Nullgv; |
dc848c6f |
428 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
429 | return Nullgv; |
430 | cv = GvCV(gv); |
431 | |
adb5a9ae |
432 | if (!(CvROOT(cv) || CvXSUB(cv))) |
ed850460 |
433 | return Nullgv; |
434 | |
dc848c6f |
435 | /* |
436 | * Inheriting AUTOLOAD for non-methods works ... for now. |
437 | */ |
b267980d |
438 | if (ckWARN(WARN_DEPRECATED) && !method && |
599cee73 |
439 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
cea2e8a9 |
440 | Perl_warner(aTHX_ WARN_DEPRECATED, |
dc848c6f |
441 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
442 | HvNAME(stash), (int)len, name); |
44a8e56a |
443 | |
adb5a9ae |
444 | #ifndef USE_THREADS |
445 | if (CvXSUB(cv)) { |
446 | /* rather than lookup/init $AUTOLOAD here |
447 | * only to have the XSUB do another lookup for $AUTOLOAD |
448 | * and split that value on the last '::', |
449 | * pass along the same data via some unused fields in the CV |
450 | */ |
451 | CvSTASH(cv) = stash; |
452 | SvPVX(cv) = (char *)name; /* cast to loose constness warning */ |
453 | SvCUR(cv) = len; |
454 | return gv; |
455 | } |
456 | #endif |
457 | |
44a8e56a |
458 | /* |
459 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
460 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
461 | * use that, but for lack of anything better we will use the sub's |
462 | * original package to look up $AUTOLOAD. |
463 | */ |
464 | varstash = GvSTASH(CvGV(cv)); |
465 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
3d35f11b |
466 | ENTER; |
467 | |
468 | #ifdef USE_THREADS |
4755096e |
469 | sv_lock((SV *)varstash); |
3d35f11b |
470 | #endif |
44a8e56a |
471 | if (!isGV(vargv)) |
472 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
3d35f11b |
473 | LEAVE; |
44a8e56a |
474 | varsv = GvSV(vargv); |
3d35f11b |
475 | #ifdef USE_THREADS |
4755096e |
476 | sv_lock(varsv); |
3d35f11b |
477 | #endif |
44a8e56a |
478 | sv_setpv(varsv, HvNAME(stash)); |
479 | sv_catpvn(varsv, "::", 2); |
480 | sv_catpvn(varsv, name, len); |
481 | SvTAINTED_off(varsv); |
a0d0e21e |
482 | return gv; |
483 | } |
484 | |
d2c93421 |
485 | /* The "gv" parameter should be the glob known to Perl code as *! |
486 | * The scalar must already have been magicalized. |
487 | */ |
488 | STATIC void |
489 | S_require_errno(pTHX_ GV *gv) |
490 | { |
491 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
492 | |
493 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
494 | dSP; |
495 | PUTBACK; |
496 | ENTER; |
497 | save_scalar(gv); /* keep the value of $! */ |
498 | require_pv("Errno.pm"); |
499 | LEAVE; |
500 | SPAGAIN; |
501 | stash = gv_stashpvn("Errno",5,FALSE); |
502 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
503 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
504 | } |
505 | } |
506 | |
954c1994 |
507 | /* |
508 | =for apidoc gv_stashpv |
509 | |
386d01d6 |
510 | Returns a pointer to the stash for a specified package. C<name> should |
511 | be a valid UTF-8 string. If C<create> is set then the package will be |
512 | created if it does not already exist. If C<create> is not set and the |
513 | package does not exist then NULL is returned. |
954c1994 |
514 | |
515 | =cut |
516 | */ |
517 | |
a0d0e21e |
518 | HV* |
864dbfa3 |
519 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
520 | { |
dc437b57 |
521 | return gv_stashpvn(name, strlen(name), create); |
522 | } |
523 | |
524 | HV* |
864dbfa3 |
525 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
526 | { |
46fc3d4c |
527 | char smallbuf[256]; |
528 | char *tmpbuf; |
a0d0e21e |
529 | HV *stash; |
530 | GV *tmpgv; |
dc437b57 |
531 | |
46fc3d4c |
532 | if (namelen + 3 < sizeof smallbuf) |
533 | tmpbuf = smallbuf; |
534 | else |
535 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
536 | Copy(name,tmpbuf,namelen,char); |
537 | tmpbuf[namelen++] = ':'; |
538 | tmpbuf[namelen++] = ':'; |
539 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
540 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
541 | if (tmpbuf != smallbuf) |
542 | Safefree(tmpbuf); |
a0d0e21e |
543 | if (!tmpgv) |
544 | return 0; |
545 | if (!GvHV(tmpgv)) |
546 | GvHV(tmpgv) = newHV(); |
547 | stash = GvHV(tmpgv); |
548 | if (!HvNAME(stash)) |
549 | HvNAME(stash) = savepv(name); |
550 | return stash; |
463ee0b2 |
551 | } |
552 | |
954c1994 |
553 | /* |
554 | =for apidoc gv_stashsv |
555 | |
386d01d6 |
556 | Returns a pointer to the stash for a specified package, which must be a |
557 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
558 | |
559 | =cut |
560 | */ |
561 | |
a0d0e21e |
562 | HV* |
864dbfa3 |
563 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
564 | { |
dc437b57 |
565 | register char *ptr; |
566 | STRLEN len; |
567 | ptr = SvPV(sv,len); |
568 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
569 | } |
570 | |
571 | |
463ee0b2 |
572 | GV * |
864dbfa3 |
573 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
79072805 |
574 | { |
08105a92 |
575 | register const char *name = nambeg; |
463ee0b2 |
576 | register GV *gv = 0; |
79072805 |
577 | GV**gvp; |
79072805 |
578 | I32 len; |
08105a92 |
579 | register const char *namend; |
463ee0b2 |
580 | HV *stash = 0; |
79072805 |
581 | |
c07a80fd |
582 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
583 | name++; |
584 | |
79072805 |
585 | for (namend = name; *namend; namend++) { |
1d7c1841 |
586 | if ((*namend == ':' && namend[1] == ':') |
587 | || (*namend == '\'' && namend[1])) |
463ee0b2 |
588 | { |
463ee0b2 |
589 | if (!stash) |
3280af22 |
590 | stash = PL_defstash; |
dc437b57 |
591 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
592 | return Nullgv; |
463ee0b2 |
593 | |
85e6fe83 |
594 | len = namend - name; |
595 | if (len > 0) { |
3c78fafa |
596 | char smallbuf[256]; |
62b57502 |
597 | char *tmpbuf; |
62b57502 |
598 | |
3c78fafa |
599 | if (len + 3 < sizeof smallbuf) |
600 | tmpbuf = smallbuf; |
62b57502 |
601 | else |
602 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
603 | Copy(name, tmpbuf, len, char); |
604 | tmpbuf[len++] = ':'; |
605 | tmpbuf[len++] = ':'; |
606 | tmpbuf[len] = '\0'; |
463ee0b2 |
607 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
608 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
609 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
610 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
611 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
612 | else |
613 | GvMULTI_on(gv); |
614 | } |
3c78fafa |
615 | if (tmpbuf != smallbuf) |
62b57502 |
616 | Safefree(tmpbuf); |
3280af22 |
617 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
618 | return Nullgv; |
85e6fe83 |
619 | |
463ee0b2 |
620 | if (!(stash = GvHV(gv))) |
621 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
622 | |
463ee0b2 |
623 | if (!HvNAME(stash)) |
a0d0e21e |
624 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
625 | } |
626 | |
627 | if (*namend == ':') |
628 | namend++; |
629 | namend++; |
630 | name = namend; |
631 | if (!*name) |
3280af22 |
632 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
633 | } |
79072805 |
634 | } |
a0d0e21e |
635 | len = namend - name; |
636 | if (!len) |
637 | len = 1; |
463ee0b2 |
638 | |
639 | /* No stash in name, so see how we can default */ |
640 | |
641 | if (!stash) { |
7e2040f0 |
642 | if (isIDFIRST_lazy(name)) { |
9607fc9c |
643 | bool global = FALSE; |
644 | |
463ee0b2 |
645 | if (isUPPER(*name)) { |
9d116dd7 |
646 | if (*name == 'S' && ( |
647 | strEQ(name, "SIG") || |
648 | strEQ(name, "STDIN") || |
649 | strEQ(name, "STDOUT") || |
650 | strEQ(name, "STDERR"))) |
651 | global = TRUE; |
652 | else if (*name == 'I' && strEQ(name, "INC")) |
653 | global = TRUE; |
654 | else if (*name == 'E' && strEQ(name, "ENV")) |
655 | global = TRUE; |
463ee0b2 |
656 | else if (*name == 'A' && ( |
657 | strEQ(name, "ARGV") || |
9d116dd7 |
658 | strEQ(name, "ARGVOUT"))) |
463ee0b2 |
659 | global = TRUE; |
660 | } |
661 | else if (*name == '_' && !name[1]) |
662 | global = TRUE; |
9607fc9c |
663 | |
463ee0b2 |
664 | if (global) |
3280af22 |
665 | stash = PL_defstash; |
666 | else if ((COP*)PL_curcop == &PL_compiling) { |
667 | stash = PL_curstash; |
668 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
669 | sv_type != SVt_PVCV && |
670 | sv_type != SVt_PVGV && |
4633a7c4 |
671 | sv_type != SVt_PVFM && |
c07a80fd |
672 | sv_type != SVt_PVIO && |
377b8fbc |
673 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
674 | { |
4633a7c4 |
675 | gvp = (GV**)hv_fetch(stash,name,len,0); |
676 | if (!gvp || |
3280af22 |
677 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
678 | SvTYPE(*gvp) != SVt_PVGV) |
679 | { |
4633a7c4 |
680 | stash = 0; |
a5f75d66 |
681 | } |
155aba94 |
682 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
683 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
684 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
685 | { |
cea2e8a9 |
686 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
687 | sv_type == SVt_PVAV ? '@' : |
688 | sv_type == SVt_PVHV ? '%' : '$', |
689 | name); |
8ebc5c01 |
690 | if (GvCVu(*gvp)) |
cc507455 |
691 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
692 | stash = 0; |
4633a7c4 |
693 | } |
a0d0e21e |
694 | } |
85e6fe83 |
695 | } |
463ee0b2 |
696 | else |
1d7c1841 |
697 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
698 | } |
699 | else |
3280af22 |
700 | stash = PL_defstash; |
463ee0b2 |
701 | } |
702 | |
703 | /* By this point we should have a stash and a name */ |
704 | |
a0d0e21e |
705 | if (!stash) { |
5a844595 |
706 | if (add) { |
707 | qerror(Perl_mess(aTHX_ |
708 | "Global symbol \"%s%s\" requires explicit package name", |
709 | (sv_type == SVt_PV ? "$" |
710 | : sv_type == SVt_PVAV ? "@" |
711 | : sv_type == SVt_PVHV ? "%" |
712 | : ""), name)); |
f180df80 |
713 | stash = PL_nullstash; |
a0d0e21e |
714 | } |
f180df80 |
715 | else |
716 | return Nullgv; |
a0d0e21e |
717 | } |
718 | |
719 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
720 | return Nullgv; |
721 | |
79072805 |
722 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
723 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
724 | return Nullgv; |
725 | gv = *gvp; |
726 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
727 | if (add) { |
a5f75d66 |
728 | GvMULTI_on(gv); |
a0d0e21e |
729 | gv_init_sv(gv, sv_type); |
d2c93421 |
730 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
731 | require_errno(gv); |
a0d0e21e |
732 | } |
79072805 |
733 | return gv; |
55d729e4 |
734 | } else if (add & GV_NOINIT) { |
735 | return gv; |
79072805 |
736 | } |
93a17b20 |
737 | |
738 | /* Adding a new symbol */ |
739 | |
0453d815 |
740 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
741 | Perl_warner(aTHX_ WARN_INTERNAL, "Had to create %s unexpectedly", nambeg); |
55d729e4 |
742 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
743 | gv_init_sv(gv, sv_type); |
93a17b20 |
744 | |
7272584d |
745 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
746 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
747 | GvMULTI_on(gv) ; |
748 | |
93a17b20 |
749 | /* set up magic where warranted */ |
750 | switch (*name) { |
a0d0e21e |
751 | case 'A': |
752 | if (strEQ(name, "ARGV")) { |
753 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
754 | } |
755 | break; |
a0d0e21e |
756 | case 'E': |
757 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
758 | GvMULTI_on(gv); |
a0d0e21e |
759 | break; |
463ee0b2 |
760 | case 'I': |
761 | if (strEQ(name, "ISA")) { |
762 | AV* av = GvAVn(gv); |
a5f75d66 |
763 | GvMULTI_on(gv); |
14befaf4 |
764 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0); |
93965878 |
765 | /* NOTE: No support for tied ISA */ |
55d729e4 |
766 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
767 | && AvFILLp(av) == -1) |
85e6fe83 |
768 | { |
a0d0e21e |
769 | char *pname; |
79cb57f6 |
770 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
dc437b57 |
771 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
772 | av_push(av, newSVpvn(pname = "DB_File",7)); |
dc437b57 |
773 | gv_stashpvn(pname, 7, TRUE); |
79cb57f6 |
774 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
dc437b57 |
775 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
776 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
dc437b57 |
777 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
778 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
dc437b57 |
779 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
780 | } |
463ee0b2 |
781 | } |
782 | break; |
a0d0e21e |
783 | case 'O': |
784 | if (strEQ(name, "OVERLOAD")) { |
785 | HV* hv = GvHVn(gv); |
a5f75d66 |
786 | GvMULTI_on(gv); |
14befaf4 |
787 | hv_magic(hv, Nullgv, PERL_MAGIC_overload); |
a0d0e21e |
788 | } |
789 | break; |
93a17b20 |
790 | case 'S': |
791 | if (strEQ(name, "SIG")) { |
792 | HV *hv; |
dc437b57 |
793 | I32 i; |
1d7c1841 |
794 | if (!PL_psig_ptr) { |
0a8e0eff |
795 | Newz(73, PL_psig_ptr, SIG_SIZE, SV*); |
796 | Newz(73, PL_psig_name, SIG_SIZE, SV*); |
797 | Newz(73, PL_psig_pend, SIG_SIZE, int); |
1d7c1841 |
798 | } |
799 | GvMULTI_on(gv); |
800 | hv = GvHVn(gv); |
14befaf4 |
801 | hv_magic(hv, Nullgv, PERL_MAGIC_sig); |
76d3c696 |
802 | for (i = 1; i < SIG_SIZE; i++) { |
dc437b57 |
803 | SV ** init; |
1d7c1841 |
804 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
805 | if (init) |
806 | sv_setsv(*init, &PL_sv_undef); |
22c35a8c |
807 | PL_psig_ptr[i] = 0; |
808 | PL_psig_name[i] = 0; |
0a8e0eff |
809 | PL_psig_pend[i] = 0; |
dc437b57 |
810 | } |
93a17b20 |
811 | } |
812 | break; |
09bef843 |
813 | case 'V': |
814 | if (strEQ(name, "VERSION")) |
815 | GvMULTI_on(gv); |
816 | break; |
93a17b20 |
817 | |
818 | case '&': |
463ee0b2 |
819 | if (len > 1) |
820 | break; |
3280af22 |
821 | PL_sawampersand = TRUE; |
a0d0e21e |
822 | goto ro_magicalize; |
93a17b20 |
823 | |
824 | case '`': |
463ee0b2 |
825 | if (len > 1) |
826 | break; |
3280af22 |
827 | PL_sawampersand = TRUE; |
a0d0e21e |
828 | goto ro_magicalize; |
93a17b20 |
829 | |
830 | case '\'': |
463ee0b2 |
831 | if (len > 1) |
832 | break; |
3280af22 |
833 | PL_sawampersand = TRUE; |
a0d0e21e |
834 | goto ro_magicalize; |
93a17b20 |
835 | |
836 | case ':': |
463ee0b2 |
837 | if (len > 1) |
838 | break; |
3280af22 |
839 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 |
840 | goto magicalize; |
841 | |
ff0cee69 |
842 | case '?': |
843 | if (len > 1) |
844 | break; |
845 | #ifdef COMPLEX_STATUS |
07f14f54 |
846 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
ff0cee69 |
847 | #endif |
848 | goto magicalize; |
849 | |
067391ea |
850 | case '!': |
4318d5a0 |
851 | if (len > 1) |
067391ea |
852 | break; |
d2c93421 |
853 | |
854 | /* If %! has been used, automatically load Errno.pm. |
855 | The require will itself set errno, so in order to |
856 | preserve its value we have to set up the magic |
857 | now (rather than going to magicalize) |
858 | */ |
859 | |
14befaf4 |
860 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
861 | |
862 | if (sv_type == SVt_PVHV) |
863 | require_errno(gv); |
864 | |
865 | break; |
6cef1e77 |
866 | case '-': |
867 | if (len > 1) |
868 | break; |
869 | else { |
870 | AV* av = GvAVn(gv); |
14befaf4 |
871 | sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
872 | SvREADONLY_on(av); |
6cef1e77 |
873 | } |
874 | goto magicalize; |
93a17b20 |
875 | case '#': |
a0d0e21e |
876 | case '*': |
599cee73 |
877 | if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV) |
cea2e8a9 |
878 | Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name); |
a0d0e21e |
879 | /* FALL THROUGH */ |
880 | case '[': |
93a17b20 |
881 | case '^': |
882 | case '~': |
883 | case '=': |
93a17b20 |
884 | case '%': |
885 | case '.': |
93a17b20 |
886 | case '(': |
887 | case ')': |
888 | case '<': |
889 | case '>': |
890 | case ',': |
891 | case '\\': |
892 | case '/': |
16070b82 |
893 | case '\001': /* $^A */ |
894 | case '\003': /* $^C */ |
895 | case '\004': /* $^D */ |
896 | case '\005': /* $^E */ |
897 | case '\006': /* $^F */ |
898 | case '\010': /* $^H */ |
899 | case '\011': /* $^I, NOT \t in EBCDIC */ |
16070b82 |
900 | case '\020': /* $^P */ |
901 | case '\024': /* $^T */ |
463ee0b2 |
902 | if (len > 1) |
903 | break; |
904 | goto magicalize; |
d8ce0c9a |
905 | case '|': |
906 | if (len > 1) |
907 | break; |
908 | sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
909 | goto magicalize; |
ac27b0f5 |
910 | case '\017': /* $^O & $^OPEN */ |
911 | if (len > 1 && strNE(name, "\017PEN")) |
912 | break; |
913 | goto magicalize; |
16070b82 |
914 | case '\023': /* $^S */ |
6cef1e77 |
915 | if (len > 1) |
916 | break; |
917 | goto ro_magicalize; |
6a818117 |
918 | case '\027': /* $^W & $^WARNING_BITS */ |
a50e31ad |
919 | if (len > 1 && strNE(name, "\027ARNING_BITS") |
920 | && strNE(name, "\027IDE_SYSTEM_CALLS")) |
4438c4b7 |
921 | break; |
922 | goto magicalize; |
463ee0b2 |
923 | |
a0d0e21e |
924 | case '+': |
6cef1e77 |
925 | if (len > 1) |
926 | break; |
927 | else { |
928 | AV* av = GvAVn(gv); |
14befaf4 |
929 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
930 | SvREADONLY_on(av); |
6cef1e77 |
931 | } |
932 | /* FALL THROUGH */ |
463ee0b2 |
933 | case '1': |
934 | case '2': |
935 | case '3': |
936 | case '4': |
937 | case '5': |
938 | case '6': |
939 | case '7': |
940 | case '8': |
941 | case '9': |
a0d0e21e |
942 | ro_magicalize: |
943 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
944 | magicalize: |
14befaf4 |
945 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
93a17b20 |
946 | break; |
947 | |
16070b82 |
948 | case '\014': /* $^L */ |
463ee0b2 |
949 | if (len > 1) |
950 | break; |
93a17b20 |
951 | sv_setpv(GvSV(gv),"\f"); |
3280af22 |
952 | PL_formfeed = GvSV(gv); |
93a17b20 |
953 | break; |
954 | case ';': |
463ee0b2 |
955 | if (len > 1) |
956 | break; |
93a17b20 |
957 | sv_setpv(GvSV(gv),"\034"); |
958 | break; |
463ee0b2 |
959 | case ']': |
960 | if (len == 1) { |
f86702cc |
961 | SV *sv = GvSV(gv); |
5089c844 |
962 | (void)SvUPGRADE(sv, SVt_PVNV); |
6a6ba966 |
963 | Perl_sv_setpvf(aTHX_ sv, |
964 | #if defined(PERL_SUBVERSION) && (PERL_SUBVERSION > 0) |
965 | "%8.6" |
966 | #else |
967 | "%5.3" |
968 | #endif |
969 | NVff, |
970 | SvNVX(PL_patchlevel)); |
5089c844 |
971 | SvNVX(sv) = SvNVX(PL_patchlevel); |
972 | SvNOK_on(sv); |
5089c844 |
973 | SvREADONLY_on(sv); |
93a17b20 |
974 | } |
975 | break; |
16070b82 |
976 | case '\026': /* $^V */ |
977 | if (len == 1) { |
978 | SV *sv = GvSV(gv); |
979 | GvSV(gv) = SvREFCNT_inc(PL_patchlevel); |
980 | SvREFCNT_dec(sv); |
981 | } |
982 | break; |
79072805 |
983 | } |
93a17b20 |
984 | return gv; |
79072805 |
985 | } |
986 | |
987 | void |
43693395 |
988 | Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
989 | { |
990 | HV *hv = GvSTASH(gv); |
991 | if (!hv) { |
992 | (void)SvOK_off(sv); |
993 | return; |
994 | } |
995 | sv_setpv(sv, prefix ? prefix : ""); |
996 | if (keepmain || strNE(HvNAME(hv), "main")) { |
997 | sv_catpv(sv,HvNAME(hv)); |
998 | sv_catpvn(sv,"::", 2); |
999 | } |
1000 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
1001 | } |
1002 | |
1003 | void |
864dbfa3 |
1004 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
1005 | { |
1006 | HV *hv = GvSTASH(gv); |
f967eb5f |
1007 | if (!hv) { |
155aba94 |
1008 | (void)SvOK_off(sv); |
79072805 |
1009 | return; |
f967eb5f |
1010 | } |
1011 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
1012 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
1013 | sv_catpvn(sv,"::", 2); |
79072805 |
1014 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
1015 | } |
1016 | |
1017 | void |
43693395 |
1018 | Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
1019 | { |
1020 | GV *egv = GvEGV(gv); |
1021 | if (!egv) |
1022 | egv = gv; |
1023 | gv_fullname4(sv, egv, prefix, keepmain); |
1024 | } |
1025 | |
1026 | void |
864dbfa3 |
1027 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
1028 | { |
f967eb5f |
1029 | GV *egv = GvEGV(gv); |
748a9306 |
1030 | if (!egv) |
1031 | egv = gv; |
f6aff53a |
1032 | gv_fullname3(sv, egv, prefix); |
1033 | } |
1034 | |
1035 | /* XXX compatibility with versions <= 5.003. */ |
1036 | void |
864dbfa3 |
1037 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
1038 | { |
1039 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
1040 | } |
1041 | |
1042 | /* XXX compatibility with versions <= 5.003. */ |
1043 | void |
864dbfa3 |
1044 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
1045 | { |
1046 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
1047 | } |
1048 | |
1049 | IO * |
864dbfa3 |
1050 | Perl_newIO(pTHX) |
79072805 |
1051 | { |
1052 | IO *io; |
8990e307 |
1053 | GV *iogv; |
1054 | |
1055 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
1056 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
1057 | SvREFCNT(io) = 1; |
1058 | SvOBJECT_on(io); |
c9de509e |
1059 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d |
1060 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1061 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
c9de509e |
1062 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
1063 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
1064 | return io; |
1065 | } |
1066 | |
1067 | void |
864dbfa3 |
1068 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1069 | { |
1070 | register HE *entry; |
1071 | register I32 i; |
1072 | register GV *gv; |
463ee0b2 |
1073 | HV *hv; |
1074 | |
8990e307 |
1075 | if (!HvARRAY(stash)) |
1076 | return; |
a0d0e21e |
1077 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
1078 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
1079 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
1080 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
1081 | { |
19b6c847 |
1082 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1083 | gv_check(hv); /* nested package */ |
1084 | } |
dc437b57 |
1085 | else if (isALPHA(*HeKEY(entry))) { |
1d7c1841 |
1086 | char *file; |
dc437b57 |
1087 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1088 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1089 | continue; |
1d7c1841 |
1090 | file = GvFILE(gv); |
1091 | /* performance hack: if filename is absolute and it's a standard |
1092 | * module, don't bother warning */ |
1093 | if (file |
1094 | && PERL_FILE_IS_ABSOLUTE(file) |
6eb630b7 |
1095 | #ifdef MACOS_TRADITIONAL |
1096 | && (instr(file, ":lib:") |
1097 | #else |
1098 | && (instr(file, "/lib/") |
1099 | #endif |
1100 | || instr(file, ".pm"))) |
1d7c1841 |
1101 | { |
8990e307 |
1102 | continue; |
1d7c1841 |
1103 | } |
1104 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1105 | #ifdef USE_ITHREADS |
1106 | CopFILE(PL_curcop) = file; /* set for warning */ |
1107 | #else |
1108 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1109 | #endif |
cea2e8a9 |
1110 | Perl_warner(aTHX_ WARN_ONCE, |
599cee73 |
1111 | "Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
1112 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
1113 | } |
79072805 |
1114 | } |
1115 | } |
1116 | } |
1117 | |
1118 | GV * |
864dbfa3 |
1119 | Perl_newGVgen(pTHX_ char *pack) |
79072805 |
1120 | { |
cea2e8a9 |
1121 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1122 | TRUE, SVt_PVGV); |
79072805 |
1123 | } |
1124 | |
1125 | /* hopefully this is only called on local symbol table entries */ |
1126 | |
1127 | GP* |
864dbfa3 |
1128 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1129 | { |
1d7c1841 |
1130 | if (!gp) |
1131 | return (GP*)NULL; |
79072805 |
1132 | gp->gp_refcnt++; |
44a8e56a |
1133 | if (gp->gp_cv) { |
1134 | if (gp->gp_cvgen) { |
1135 | /* multi-named GPs cannot be used for method cache */ |
1136 | SvREFCNT_dec(gp->gp_cv); |
1137 | gp->gp_cv = Nullcv; |
1138 | gp->gp_cvgen = 0; |
1139 | } |
1140 | else { |
1141 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1142 | PL_sub_generation++; |
44a8e56a |
1143 | } |
1144 | } |
79072805 |
1145 | return gp; |
79072805 |
1146 | } |
1147 | |
1148 | void |
864dbfa3 |
1149 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1150 | { |
79072805 |
1151 | GP* gp; |
1152 | |
1153 | if (!gv || !(gp = GvGP(gv))) |
1154 | return; |
f248d071 |
1155 | if (gp->gp_refcnt == 0) { |
1156 | if (ckWARN_d(WARN_INTERNAL)) |
1157 | Perl_warner(aTHX_ WARN_INTERNAL, |
1158 | "Attempt to free unreferenced glob pointers"); |
79072805 |
1159 | return; |
1160 | } |
44a8e56a |
1161 | if (gp->gp_cv) { |
1162 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1163 | PL_sub_generation++; |
44a8e56a |
1164 | } |
748a9306 |
1165 | if (--gp->gp_refcnt > 0) { |
1166 | if (gp->gp_egv == gv) |
1167 | gp->gp_egv = 0; |
79072805 |
1168 | return; |
748a9306 |
1169 | } |
79072805 |
1170 | |
8990e307 |
1171 | SvREFCNT_dec(gp->gp_sv); |
1172 | SvREFCNT_dec(gp->gp_av); |
1173 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
1174 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
1175 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
1176 | SvREFCNT_dec(gp->gp_form); |
1177 | |
79072805 |
1178 | Safefree(gp); |
1179 | GvGP(gv) = 0; |
1180 | } |
1181 | |
1182 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
1183 | #define MICROPORT |
1184 | #endif |
1185 | |
1186 | #ifdef MICROPORT /* Microport 2.4 hack */ |
1187 | AV *GvAVn(gv) |
1188 | register GV *gv; |
1189 | { |
b267980d |
1190 | if (GvGP(gv)->gp_av) |
79072805 |
1191 | return GvGP(gv)->gp_av; |
1192 | else |
1193 | return GvGP(gv_AVadd(gv))->gp_av; |
1194 | } |
1195 | |
1196 | HV *GvHVn(gv) |
1197 | register GV *gv; |
1198 | { |
1199 | if (GvGP(gv)->gp_hv) |
1200 | return GvGP(gv)->gp_hv; |
1201 | else |
1202 | return GvGP(gv_HVadd(gv))->gp_hv; |
1203 | } |
1204 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
1205 | |
d460ef45 |
1206 | int |
1207 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1208 | { |
1209 | AMT *amtp = (AMT*)mg->mg_ptr; |
1210 | if (amtp && AMT_AMAGIC(amtp)) { |
1211 | int i; |
1212 | for (i = 1; i < NofAMmeth; i++) { |
1213 | CV *cv = amtp->table[i]; |
1214 | if (cv != Nullcv) { |
1215 | SvREFCNT_dec((SV *) cv); |
1216 | amtp->table[i] = Nullcv; |
1217 | } |
1218 | } |
1219 | } |
1220 | return 0; |
1221 | } |
1222 | |
a0d0e21e |
1223 | /* Updates and caches the CV's */ |
1224 | |
1225 | bool |
864dbfa3 |
1226 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1227 | { |
a0d0e21e |
1228 | GV* gv; |
1229 | CV* cv; |
14befaf4 |
1230 | MAGIC* mg=mg_find((SV*)stash, PERL_MAGIC_overload_table); |
8ac85365 |
1231 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1232 | AMT amt; |
a0d0e21e |
1233 | |
3280af22 |
1234 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1235 | && amtp->was_ok_sub == PL_sub_generation) |
32251b26 |
1236 | return AMT_OVERLOADED(amtp); |
14befaf4 |
1237 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e |
1238 | |
cea2e8a9 |
1239 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
a0d0e21e |
1240 | |
d460ef45 |
1241 | Zero(&amt,1,AMT); |
3280af22 |
1242 | amt.was_ok_am = PL_amagic_generation; |
1243 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1244 | amt.fallback = AMGfallNO; |
1245 | amt.flags = 0; |
1246 | |
a6006777 |
1247 | { |
32251b26 |
1248 | int filled = 0, have_ovl = 0; |
1249 | int i, lim = 1; |
a6006777 |
1250 | SV* sv = NULL; |
a6006777 |
1251 | |
22c35a8c |
1252 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1253 | |
89ffc314 |
1254 | /* Try to find via inheritance. */ |
1255 | gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1256 | if (gv) |
1257 | sv = GvSV(gv); |
1258 | |
1259 | if (!gv) |
32251b26 |
1260 | lim = DESTROY_amg; /* Skip overloading entries. */ |
89ffc314 |
1261 | else if (SvTRUE(sv)) |
1262 | amt.fallback=AMGfallYES; |
1263 | else if (SvOK(sv)) |
1264 | amt.fallback=AMGfallNEVER; |
a6006777 |
1265 | |
32251b26 |
1266 | for (i = 1; i < lim; i++) |
1267 | amt.table[i] = Nullcv; |
1268 | for (; i < NofAMmeth; i++) { |
c8ce92fc |
1269 | char *cooky = (char*)PL_AMG_names[i]; |
32251b26 |
1270 | /* Human-readable form, for debugging: */ |
1271 | char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
89ffc314 |
1272 | STRLEN l = strlen(cooky); |
1273 | |
cea2e8a9 |
1274 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
44a8e56a |
1275 | cp, HvNAME(stash)) ); |
46fc3d4c |
1276 | /* don't fill the cache while looking up! */ |
89ffc314 |
1277 | gv = gv_fetchmeth(stash, cooky, l, -1); |
46fc3d4c |
1278 | cv = 0; |
89ffc314 |
1279 | if (gv && (cv = GvCV(gv))) { |
44a8e56a |
1280 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1281 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1282 | /* GvSV contains the name of the method. */ |
1283 | GV *ngv; |
1284 | |
b267980d |
1285 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
9c5ffd7c |
1286 | SvPV_nolen(GvSV(gv)), cp, HvNAME(stash)) ); |
b267980d |
1287 | if (!SvPOK(GvSV(gv)) |
dc848c6f |
1288 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1289 | FALSE))) |
1290 | { |
44a8e56a |
1291 | /* Can be an import stub (created by `can'). */ |
1292 | if (GvCVGEN(gv)) { |
b267980d |
1293 | Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1294 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1295 | cp, HvNAME(stash)); |
1296 | } else |
b267980d |
1297 | Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1298 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1299 | cp, HvNAME(stash)); |
1300 | } |
dc848c6f |
1301 | cv = GvCV(gv = ngv); |
44a8e56a |
1302 | } |
cea2e8a9 |
1303 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
44a8e56a |
1304 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1305 | GvNAME(CvGV(cv))) ); |
1306 | filled = 1; |
32251b26 |
1307 | if (i < DESTROY_amg) |
1308 | have_ovl = 1; |
44a8e56a |
1309 | } |
a6006777 |
1310 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1311 | } |
a0d0e21e |
1312 | if (filled) { |
a6006777 |
1313 | AMT_AMAGIC_on(&amt); |
32251b26 |
1314 | if (have_ovl) |
1315 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1316 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1317 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1318 | return have_ovl; |
a0d0e21e |
1319 | } |
1320 | } |
a6006777 |
1321 | /* Here we have no table: */ |
9cbac4c7 |
1322 | /* no_table: */ |
a6006777 |
1323 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1324 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1325 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1326 | return FALSE; |
1327 | } |
1328 | |
32251b26 |
1329 | |
1330 | CV* |
1331 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1332 | { |
3f8f4626 |
1333 | MAGIC *mg; |
32251b26 |
1334 | AMT *amtp; |
1335 | |
3f8f4626 |
1336 | if (!stash) |
1337 | return Nullcv; |
14befaf4 |
1338 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1339 | if (!mg) { |
1340 | do_update: |
1341 | Gv_AMupdate(stash); |
14befaf4 |
1342 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1343 | } |
1344 | amtp = (AMT*)mg->mg_ptr; |
1345 | if ( amtp->was_ok_am != PL_amagic_generation |
1346 | || amtp->was_ok_sub != PL_sub_generation ) |
1347 | goto do_update; |
1348 | if (AMT_AMAGIC(amtp)) |
1349 | return amtp->table[id]; |
1350 | return Nullcv; |
1351 | } |
1352 | |
1353 | |
a0d0e21e |
1354 | SV* |
864dbfa3 |
1355 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1356 | { |
b267980d |
1357 | MAGIC *mg; |
9c5ffd7c |
1358 | CV *cv=NULL; |
a0d0e21e |
1359 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c |
1360 | AMT *amtp=NULL, *oamtp=NULL; |
1361 | int fl=0, off=0, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
ee239bfe |
1362 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
13689cfe |
1363 | HV* stash=NULL; |
a0d0e21e |
1364 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
14befaf4 |
1365 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))), |
1366 | PERL_MAGIC_overload_table)) |
b267980d |
1367 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1368 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1369 | : (CV **) NULL)) |
b267980d |
1370 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1371 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1372 | * usual method */ |
1373 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1374 | lr = -1; /* Call method for left argument */ |
1375 | } else { |
1376 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1377 | int logic; |
1378 | |
1379 | /* look for substituted methods */ |
ee239bfe |
1380 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1381 | switch (method) { |
1382 | case inc_amg: |
ee239bfe |
1383 | force_cpy = 1; |
1384 | if ((cv = cvp[off=add_ass_amg]) |
1385 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1386 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1387 | } |
1388 | break; |
1389 | case dec_amg: |
ee239bfe |
1390 | force_cpy = 1; |
1391 | if ((cv = cvp[off = subtr_ass_amg]) |
1392 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1393 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1394 | } |
1395 | break; |
1396 | case bool__amg: |
1397 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1398 | break; |
1399 | case numer_amg: |
1400 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1401 | break; |
1402 | case string_amg: |
1403 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1404 | break; |
dc437b57 |
1405 | case not_amg: |
b267980d |
1406 | (void)((cv = cvp[off=bool__amg]) |
dc437b57 |
1407 | || (cv = cvp[off=numer_amg]) |
1408 | || (cv = cvp[off=string_amg])); |
1409 | postpr = 1; |
1410 | break; |
748a9306 |
1411 | case copy_amg: |
1412 | { |
76e3520e |
1413 | /* |
1414 | * SV* ref causes confusion with the interpreter variable of |
1415 | * the same name |
1416 | */ |
1417 | SV* tmpRef=SvRV(left); |
1418 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1419 | /* |
1420 | * Just to be extra cautious. Maybe in some |
1421 | * additional cases sv_setsv is safe, too. |
1422 | */ |
76e3520e |
1423 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1424 | SvOBJECT_on(newref); |
76e3520e |
1425 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1426 | return newref; |
1427 | } |
1428 | } |
1429 | break; |
a0d0e21e |
1430 | case abs_amg: |
b267980d |
1431 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1432 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1433 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1434 | if (off1==lt_amg) { |
748a9306 |
1435 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1436 | lt_amg,AMGf_noright); |
1437 | logic = SvTRUE(lessp); |
1438 | } else { |
748a9306 |
1439 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1440 | ncmp_amg,AMGf_noright); |
1441 | logic = (SvNV(lessp) < 0); |
1442 | } |
1443 | if (logic) { |
1444 | if (off==subtr_amg) { |
1445 | right = left; |
748a9306 |
1446 | left = nullsv; |
a0d0e21e |
1447 | lr = 1; |
1448 | } |
1449 | } else { |
1450 | return left; |
1451 | } |
1452 | } |
1453 | break; |
1454 | case neg_amg: |
155aba94 |
1455 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1456 | right = left; |
1457 | left = sv_2mortal(newSViv(0)); |
1458 | lr = 1; |
1459 | } |
1460 | break; |
f216259d |
1461 | case int_amg: |
f5284f61 |
1462 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1463 | /* FAIL safe */ |
1464 | return NULL; /* Delegate operation to standard mechanisms. */ |
1465 | break; |
f5284f61 |
1466 | case to_sv_amg: |
1467 | case to_av_amg: |
1468 | case to_hv_amg: |
1469 | case to_gv_amg: |
1470 | case to_cv_amg: |
1471 | /* FAIL safe */ |
b267980d |
1472 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1473 | break; |
a0d0e21e |
1474 | default: |
1475 | goto not_found; |
1476 | } |
1477 | if (!cv) goto not_found; |
1478 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
14befaf4 |
1479 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))), |
1480 | PERL_MAGIC_overload_table)) |
b267980d |
1481 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1482 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1483 | : (CV **) NULL)) |
a0d0e21e |
1484 | && (cv = cvp[off=method])) { /* Method for right |
1485 | * argument found */ |
1486 | lr=1; |
b267980d |
1487 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1488 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1489 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1490 | && !(flags & AMGf_unary)) { |
1491 | /* We look for substitution for |
1492 | * comparison operations and |
fc36a67e |
1493 | * concatenation */ |
a0d0e21e |
1494 | if (method==concat_amg || method==concat_ass_amg |
1495 | || method==repeat_amg || method==repeat_ass_amg) { |
1496 | return NULL; /* Delegate operation to string conversion */ |
1497 | } |
1498 | off = -1; |
1499 | switch (method) { |
1500 | case lt_amg: |
1501 | case le_amg: |
1502 | case gt_amg: |
1503 | case ge_amg: |
1504 | case eq_amg: |
1505 | case ne_amg: |
1506 | postpr = 1; off=ncmp_amg; break; |
1507 | case slt_amg: |
1508 | case sle_amg: |
1509 | case sgt_amg: |
1510 | case sge_amg: |
1511 | case seq_amg: |
1512 | case sne_amg: |
1513 | postpr = 1; off=scmp_amg; break; |
1514 | } |
1515 | if (off != -1) cv = cvp[off]; |
1516 | if (!cv) { |
1517 | goto not_found; |
1518 | } |
1519 | } else { |
a6006777 |
1520 | not_found: /* No method found, either report or croak */ |
b267980d |
1521 | switch (method) { |
1522 | case to_sv_amg: |
1523 | case to_av_amg: |
1524 | case to_hv_amg: |
1525 | case to_gv_amg: |
1526 | case to_cv_amg: |
1527 | /* FAIL safe */ |
1528 | return left; /* Delegate operation to standard mechanisms. */ |
1529 | break; |
1530 | } |
a0d0e21e |
1531 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1532 | notfound = 1; lr = -1; |
1533 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1534 | notfound = 1; lr = 1; |
1535 | } else { |
46fc3d4c |
1536 | SV *msg; |
774d564b |
1537 | if (off==-1) off=method; |
b267980d |
1538 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
46fc3d4c |
1539 | "Operation `%s': no method found,%sargument %s%s%s%s", |
89ffc314 |
1540 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1541 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1542 | SvAMAGIC(left)? |
a0d0e21e |
1543 | "in overloaded package ": |
1544 | "has no overloaded magic", |
b267980d |
1545 | SvAMAGIC(left)? |
a0d0e21e |
1546 | HvNAME(SvSTASH(SvRV(left))): |
1547 | "", |
b267980d |
1548 | SvAMAGIC(right)? |
e7ea3e70 |
1549 | ",\n\tright argument in overloaded package ": |
b267980d |
1550 | (flags & AMGf_unary |
e7ea3e70 |
1551 | ? "" |
1552 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1553 | SvAMAGIC(right)? |
a0d0e21e |
1554 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1555 | "")); |
a0d0e21e |
1556 | if (amtp && amtp->fallback >= AMGfallYES) { |
cea2e8a9 |
1557 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
a0d0e21e |
1558 | } else { |
894356b3 |
1559 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1560 | } |
1561 | return NULL; |
1562 | } |
ee239bfe |
1563 | force_cpy = force_cpy || assign; |
a0d0e21e |
1564 | } |
1565 | } |
1566 | if (!notfound) { |
b267980d |
1567 | DEBUG_o( Perl_deb(aTHX_ |
46fc3d4c |
1568 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
89ffc314 |
1569 | AMG_id2name(off), |
748a9306 |
1570 | method+assignshift==off? "" : |
1571 | " (initially `", |
1572 | method+assignshift==off? "" : |
89ffc314 |
1573 | AMG_id2name(method+assignshift), |
748a9306 |
1574 | method+assignshift==off? "" : "')", |
1575 | flags & AMGf_unary? "" : |
1576 | lr==1 ? " for right argument": " for left argument", |
1577 | flags & AMGf_unary? " for argument" : "", |
b267980d |
1578 | HvNAME(stash), |
a0d0e21e |
1579 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1580 | } |
748a9306 |
1581 | /* Since we use shallow copy during assignment, we need |
1582 | * to dublicate the contents, probably calling user-supplied |
1583 | * version of copy operator |
1584 | */ |
ee239bfe |
1585 | /* We need to copy in following cases: |
1586 | * a) Assignment form was called. |
1587 | * assignshift==1, assign==T, method + 1 == off |
1588 | * b) Increment or decrement, called directly. |
1589 | * assignshift==0, assign==0, method + 0 == off |
1590 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1591 | * assignshift==0, assign==T, |
ee239bfe |
1592 | * force_cpy == T |
1593 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1594 | * assignshift==0, assign==0, |
ee239bfe |
1595 | * force_cpy == T |
1596 | * e) Assignment form translated to nomethod. |
1597 | * assignshift==1, assign==T, method + 1 != off |
1598 | * force_cpy == T |
1599 | */ |
1600 | /* off is method, method+assignshift, or a result of opcode substitution. |
1601 | * In the latter case assignshift==0, so only notfound case is important. |
1602 | */ |
1603 | if (( (method + assignshift == off) |
1604 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1605 | || force_cpy) |
1606 | RvDEEPCP(left); |
a0d0e21e |
1607 | { |
1608 | dSP; |
1609 | BINOP myop; |
1610 | SV* res; |
54310121 |
1611 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1612 | |
54310121 |
1613 | CATCH_SET(TRUE); |
a0d0e21e |
1614 | Zero(&myop, 1, BINOP); |
1615 | myop.op_last = (OP *) &myop; |
1616 | myop.op_next = Nullop; |
54310121 |
1617 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1618 | |
e788e7d3 |
1619 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1620 | ENTER; |
462e5cf6 |
1621 | SAVEOP(); |
533c011a |
1622 | PL_op = (OP *) &myop; |
3280af22 |
1623 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1624 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1625 | PUTBACK; |
cea2e8a9 |
1626 | pp_pushmark(); |
a0d0e21e |
1627 | |
924508f0 |
1628 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1629 | PUSHs(lr>0? right: left); |
1630 | PUSHs(lr>0? left: right); |
3280af22 |
1631 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1632 | if (notfound) { |
89ffc314 |
1633 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1634 | } |
1635 | PUSHs((SV*)cv); |
1636 | PUTBACK; |
1637 | |
155aba94 |
1638 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1639 | CALLRUNOPS(aTHX); |
a0d0e21e |
1640 | LEAVE; |
1641 | SPAGAIN; |
1642 | |
1643 | res=POPs; |
ebafeae7 |
1644 | PUTBACK; |
d3acc0f7 |
1645 | POPSTACK; |
54310121 |
1646 | CATCH_SET(oldcatch); |
a0d0e21e |
1647 | |
a0d0e21e |
1648 | if (postpr) { |
9c5ffd7c |
1649 | int ans=0; |
a0d0e21e |
1650 | switch (method) { |
1651 | case le_amg: |
1652 | case sle_amg: |
1653 | ans=SvIV(res)<=0; break; |
1654 | case lt_amg: |
1655 | case slt_amg: |
1656 | ans=SvIV(res)<0; break; |
1657 | case ge_amg: |
1658 | case sge_amg: |
1659 | ans=SvIV(res)>=0; break; |
1660 | case gt_amg: |
1661 | case sgt_amg: |
1662 | ans=SvIV(res)>0; break; |
1663 | case eq_amg: |
1664 | case seq_amg: |
1665 | ans=SvIV(res)==0; break; |
1666 | case ne_amg: |
1667 | case sne_amg: |
1668 | ans=SvIV(res)!=0; break; |
1669 | case inc_amg: |
1670 | case dec_amg: |
bbce6d69 |
1671 | SvSetSV(left,res); return left; |
dc437b57 |
1672 | case not_amg: |
fe7ac86a |
1673 | ans=!SvTRUE(res); break; |
a0d0e21e |
1674 | } |
54310121 |
1675 | return boolSV(ans); |
748a9306 |
1676 | } else if (method==copy_amg) { |
1677 | if (!SvROK(res)) { |
cea2e8a9 |
1678 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1679 | } |
1680 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1681 | } else { |
1682 | return res; |
1683 | } |
1684 | } |
1685 | } |
c9d5ac95 |
1686 | |
1687 | /* |
1688 | =for apidoc is_gv_magical |
1689 | |
1690 | Returns C<TRUE> if given the name of a magical GV. |
1691 | |
1692 | Currently only useful internally when determining if a GV should be |
1693 | created even in rvalue contexts. |
1694 | |
1695 | C<flags> is not used at present but available for future extension to |
1696 | allow selecting particular classes of magical variable. |
1697 | |
1698 | =cut |
1699 | */ |
1700 | bool |
1701 | Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) |
1702 | { |
1703 | if (!len) |
1704 | return FALSE; |
1705 | |
1706 | switch (*name) { |
1707 | case 'I': |
1708 | if (len == 3 && strEQ(name, "ISA")) |
1709 | goto yes; |
1710 | break; |
1711 | case 'O': |
1712 | if (len == 8 && strEQ(name, "OVERLOAD")) |
1713 | goto yes; |
1714 | break; |
1715 | case 'S': |
1716 | if (len == 3 && strEQ(name, "SIG")) |
1717 | goto yes; |
1718 | break; |
ac27b0f5 |
1719 | case '\017': /* $^O & $^OPEN */ |
1720 | if (len == 1 |
1721 | || (len == 4 && strEQ(name, "\027PEN"))) |
1722 | { |
1723 | goto yes; |
1724 | } |
1725 | break; |
c9d5ac95 |
1726 | case '\027': /* $^W & $^WARNING_BITS */ |
1727 | if (len == 1 |
1728 | || (len == 12 && strEQ(name, "\027ARNING_BITS")) |
1729 | || (len == 17 && strEQ(name, "\027IDE_SYSTEM_CALLS"))) |
1730 | { |
1731 | goto yes; |
1732 | } |
1733 | break; |
1734 | |
1735 | case '&': |
1736 | case '`': |
1737 | case '\'': |
1738 | case ':': |
1739 | case '?': |
1740 | case '!': |
1741 | case '-': |
1742 | case '#': |
1743 | case '*': |
1744 | case '[': |
1745 | case '^': |
1746 | case '~': |
1747 | case '=': |
1748 | case '%': |
1749 | case '.': |
1750 | case '(': |
1751 | case ')': |
1752 | case '<': |
1753 | case '>': |
1754 | case ',': |
1755 | case '\\': |
1756 | case '/': |
1757 | case '|': |
1758 | case '+': |
1759 | case ';': |
1760 | case ']': |
1761 | case '\001': /* $^A */ |
1762 | case '\003': /* $^C */ |
1763 | case '\004': /* $^D */ |
1764 | case '\005': /* $^E */ |
1765 | case '\006': /* $^F */ |
1766 | case '\010': /* $^H */ |
1767 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1768 | case '\014': /* $^L */ |
c9d5ac95 |
1769 | case '\020': /* $^P */ |
1770 | case '\023': /* $^S */ |
1771 | case '\024': /* $^T */ |
1772 | case '\026': /* $^V */ |
1773 | if (len == 1) |
1774 | goto yes; |
1775 | break; |
1776 | case '1': |
1777 | case '2': |
1778 | case '3': |
1779 | case '4': |
1780 | case '5': |
1781 | case '6': |
1782 | case '7': |
1783 | case '8': |
1784 | case '9': |
1785 | if (len > 1) { |
1786 | char *end = name + len; |
1787 | while (--end > name) { |
1788 | if (!isDIGIT(*end)) |
1789 | return FALSE; |
1790 | } |
1791 | } |
1792 | yes: |
1793 | return TRUE; |
1794 | default: |
1795 | break; |
1796 | } |
1797 | return FALSE; |
1798 | } |