Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
3818b22b |
3 | * Copyright (c) 1991-2000, 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"); |
a0d0e21e |
48 | if (!GvIOp(gv)) |
49 | GvIOp(gv) = newIO(); |
50 | return gv; |
51 | } |
52 | |
53 | GV * |
864dbfa3 |
54 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
55 | { |
53d95988 |
56 | char smallbuf[256]; |
57 | char *tmpbuf; |
8ebc5c01 |
58 | STRLEN tmplen; |
79072805 |
59 | GV *gv; |
60 | |
1d7c1841 |
61 | if (!PL_defstash) |
62 | return Nullgv; |
63 | |
53d95988 |
64 | tmplen = strlen(name) + 2; |
65 | if (tmplen < sizeof smallbuf) |
66 | tmpbuf = smallbuf; |
67 | else |
68 | New(603, tmpbuf, tmplen + 1, char); |
69 | tmpbuf[0] = '_'; |
70 | tmpbuf[1] = '<'; |
71 | strcpy(tmpbuf + 2, name); |
3280af22 |
72 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
73 | if (!isGV(gv)) { |
3280af22 |
74 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
1d7c1841 |
75 | sv_setpv(GvSV(gv), name); |
76 | if (PERLDB_LINE) |
fd345fa8 |
77 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, 'L'); |
1d7c1841 |
78 | } |
53d95988 |
79 | if (tmpbuf != smallbuf) |
80 | Safefree(tmpbuf); |
79072805 |
81 | return gv; |
82 | } |
83 | |
463ee0b2 |
84 | void |
864dbfa3 |
85 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
86 | { |
87 | register GP *gp; |
55d729e4 |
88 | bool doproto = SvTYPE(gv) > SVt_NULL; |
89 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
463ee0b2 |
90 | |
dc437b57 |
91 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
92 | if (SvLEN(gv)) { |
93 | if (proto) { |
94 | SvPVX(gv) = NULL; |
95 | SvLEN(gv) = 0; |
96 | SvPOK_off(gv); |
97 | } else |
98 | Safefree(SvPVX(gv)); |
99 | } |
44a8e56a |
100 | Newz(602, gp, 1, GP); |
8990e307 |
101 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
102 | GvSV(gv) = NEWSV(72,0); |
1d7c1841 |
103 | GvLINE(gv) = CopLINE(PL_curcop); |
104 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; |
005a453c |
105 | GvCVGEN(gv) = 0; |
463ee0b2 |
106 | GvEGV(gv) = gv; |
6662521e |
107 | sv_magic((SV*)gv, (SV*)gv, '*', Nullch, 0); |
85aff577 |
108 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e |
109 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
110 | GvNAMELEN(gv) = len; |
23ad5bf5 |
111 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
112 | GvMULTI_on(gv); |
55d729e4 |
113 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
114 | SvIOK_off(gv); |
55d729e4 |
115 | ENTER; |
b099ddc0 |
116 | /* XXX unsafe for threads if eval_owner isn't held */ |
55d729e4 |
117 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 |
118 | GvCV(gv) = PL_compcv; |
55d729e4 |
119 | LEAVE; |
120 | |
3280af22 |
121 | PL_sub_generation++; |
55d729e4 |
122 | CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv); |
1d7c1841 |
123 | CvFILE(GvCV(gv)) = CopFILE(PL_curcop); |
3280af22 |
124 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
125 | #ifdef USE_THREADS |
126 | CvOWNER(GvCV(gv)) = 0; |
1cfa4ec7 |
127 | if (!CvMUTEXP(GvCV(gv))) { |
b0a484d2 |
128 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
1cfa4ec7 |
129 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
130 | } |
55d729e4 |
131 | #endif /* USE_THREADS */ |
132 | if (proto) { |
133 | sv_setpv((SV*)GvCV(gv), proto); |
134 | Safefree(proto); |
135 | } |
136 | } |
463ee0b2 |
137 | } |
138 | |
76e3520e |
139 | STATIC void |
cea2e8a9 |
140 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
141 | { |
142 | switch (sv_type) { |
143 | case SVt_PVIO: |
144 | (void)GvIOn(gv); |
145 | break; |
146 | case SVt_PVAV: |
147 | (void)GvAVn(gv); |
148 | break; |
149 | case SVt_PVHV: |
150 | (void)GvHVn(gv); |
151 | break; |
152 | } |
153 | } |
154 | |
954c1994 |
155 | /* |
156 | =for apidoc gv_fetchmeth |
157 | |
158 | Returns the glob with the given C<name> and a defined subroutine or |
159 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
b267980d |
160 | accessible via @ISA and @UNIVERSAL. |
954c1994 |
161 | |
162 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
163 | side-effect creates a glob with the given C<name> in the given C<stash> |
164 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
165 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
166 | |
167 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
168 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
169 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
170 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
171 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
172 | |
173 | =cut |
174 | */ |
175 | |
79072805 |
176 | GV * |
864dbfa3 |
177 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
178 | { |
179 | AV* av; |
463ee0b2 |
180 | GV* topgv; |
79072805 |
181 | GV* gv; |
463ee0b2 |
182 | GV** gvp; |
748a9306 |
183 | CV* cv; |
a0d0e21e |
184 | |
185 | if (!stash) |
186 | return 0; |
44a8e56a |
187 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
188 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
3e0ccd42 |
189 | name, HvNAME(stash)); |
463ee0b2 |
190 | |
cea2e8a9 |
191 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
192 | |
193 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
194 | if (!gvp) |
195 | topgv = Nullgv; |
196 | else { |
197 | topgv = *gvp; |
198 | if (SvTYPE(topgv) != SVt_PVGV) |
199 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
200 | if ((cv = GvCV(topgv))) { |
44a8e56a |
201 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
202 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
203 | return topgv; |
44a8e56a |
204 | /* Stale cached entry: junk it */ |
205 | SvREFCNT_dec(cv); |
206 | GvCV(topgv) = cv = Nullcv; |
207 | GvCVGEN(topgv) = 0; |
748a9306 |
208 | } |
3280af22 |
209 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
210 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
211 | } |
79072805 |
212 | |
9607fc9c |
213 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
214 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
215 | |
fb73857a |
216 | /* create and re-create @.*::SUPER::ISA on demand */ |
217 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
218 | char* packname = HvNAME(stash); |
219 | STRLEN packlen = strlen(packname); |
220 | |
221 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
222 | HV* basestash; |
223 | |
224 | packlen -= 7; |
225 | basestash = gv_stashpvn(packname, packlen, TRUE); |
226 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
227 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
9607fc9c |
228 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
229 | if (!gvp || !(gv = *gvp)) |
cea2e8a9 |
230 | Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); |
9607fc9c |
231 | if (SvTYPE(gv) != SVt_PVGV) |
232 | gv_init(gv, stash, "ISA", 3, TRUE); |
233 | SvREFCNT_dec(GvAV(gv)); |
234 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
235 | } |
236 | } |
237 | } |
238 | |
239 | if (av) { |
79072805 |
240 | SV** svp = AvARRAY(av); |
93965878 |
241 | /* NOTE: No support for tied ISA */ |
242 | I32 items = AvFILLp(av) + 1; |
79072805 |
243 | while (items--) { |
79072805 |
244 | SV* sv = *svp++; |
a0d0e21e |
245 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
246 | if (!basestash) { |
599cee73 |
247 | if (ckWARN(WARN_MISC)) |
cea2e8a9 |
248 | Perl_warner(aTHX_ WARN_MISC, "Can't locate package %s for @%s::ISA", |
463ee0b2 |
249 | SvPVX(sv), HvNAME(stash)); |
79072805 |
250 | continue; |
251 | } |
44a8e56a |
252 | gv = gv_fetchmeth(basestash, name, len, |
253 | (level >= 0) ? level + 1 : level - 1); |
254 | if (gv) |
255 | goto gotcha; |
79072805 |
256 | } |
257 | } |
a0d0e21e |
258 | |
9607fc9c |
259 | /* if at top level, try UNIVERSAL */ |
260 | |
44a8e56a |
261 | if (level == 0 || level == -1) { |
9607fc9c |
262 | HV* lastchance; |
263 | |
155aba94 |
264 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
265 | if ((gv = gv_fetchmeth(lastchance, name, len, |
266 | (level >= 0) ? level + 1 : level - 1))) |
267 | { |
44a8e56a |
268 | gotcha: |
dc848c6f |
269 | /* |
270 | * Cache method in topgv if: |
271 | * 1. topgv has no synonyms (else inheritance crosses wires) |
272 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
273 | */ |
274 | if (topgv && |
275 | GvREFCNT(topgv) == 1 && |
276 | (cv = GvCV(gv)) && |
277 | (CvROOT(cv) || CvXSUB(cv))) |
278 | { |
155aba94 |
279 | if ((cv = GvCV(topgv))) |
44a8e56a |
280 | SvREFCNT_dec(cv); |
281 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
282 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
283 | } |
a0d0e21e |
284 | return gv; |
285 | } |
005a453c |
286 | else if (topgv && GvREFCNT(topgv) == 1) { |
287 | /* cache the fact that the method is not defined */ |
3280af22 |
288 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
289 | } |
a0d0e21e |
290 | } |
291 | } |
292 | |
79072805 |
293 | return 0; |
294 | } |
295 | |
954c1994 |
296 | /* |
297 | =for apidoc gv_fetchmethod |
298 | |
6d0f518e |
299 | See L<gv_fetchmethod_autoload>. |
954c1994 |
300 | |
301 | =cut |
302 | */ |
303 | |
79072805 |
304 | GV * |
864dbfa3 |
305 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
463ee0b2 |
306 | { |
dc848c6f |
307 | return gv_fetchmethod_autoload(stash, name, TRUE); |
308 | } |
309 | |
954c1994 |
310 | /* |
311 | =for apidoc gv_fetchmethod_autoload |
312 | |
313 | Returns the glob which contains the subroutine to call to invoke the method |
314 | on the C<stash>. In fact in the presence of autoloading this may be the |
315 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
316 | already setup. |
954c1994 |
317 | |
318 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
319 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
320 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
321 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
322 | with a non-zero C<autoload> parameter. |
954c1994 |
323 | |
324 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
325 | that if you want to keep the returned glob for a long time, you need to |
326 | check for it being "AUTOLOAD", since at the later time the call may load a |
327 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
328 | created via a side effect to do this. |
954c1994 |
329 | |
330 | These functions have the same side-effects and as C<gv_fetchmeth> with |
331 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
332 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
333 | C<call_sv> apply equally to these functions. |
954c1994 |
334 | |
335 | =cut |
336 | */ |
337 | |
dc848c6f |
338 | GV * |
864dbfa3 |
339 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
340 | { |
08105a92 |
341 | register const char *nend; |
342 | const char *nsplit = 0; |
a0d0e21e |
343 | GV* gv; |
b267980d |
344 | |
463ee0b2 |
345 | for (nend = name; *nend; nend++) { |
9607fc9c |
346 | if (*nend == '\'') |
a0d0e21e |
347 | nsplit = nend; |
9607fc9c |
348 | else if (*nend == ':' && *(nend + 1) == ':') |
349 | nsplit = ++nend; |
a0d0e21e |
350 | } |
351 | if (nsplit) { |
08105a92 |
352 | const char *origname = name; |
a0d0e21e |
353 | name = nsplit + 1; |
a0d0e21e |
354 | if (*nsplit == ':') |
355 | --nsplit; |
9607fc9c |
356 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
357 | /* ->SUPER::method should really be looked up in original stash */ |
cea2e8a9 |
358 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
359 | CopSTASHPV(PL_curcop))); |
9607fc9c |
360 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
361 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
9607fc9c |
362 | origname, HvNAME(stash), name) ); |
4633a7c4 |
363 | } |
9607fc9c |
364 | else |
365 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
4633a7c4 |
366 | } |
367 | |
9607fc9c |
368 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
369 | if (!gv) { |
2f6e0fe7 |
370 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
371 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
372 | else if (autoload) |
54310121 |
373 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
374 | } |
dc848c6f |
375 | else if (autoload) { |
376 | CV* cv = GvCV(gv); |
09280a33 |
377 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
378 | GV* stubgv; |
379 | GV* autogv; |
380 | |
381 | if (CvANON(cv)) |
382 | stubgv = gv; |
383 | else { |
384 | stubgv = CvGV(cv); |
385 | if (GvCV(stubgv) != cv) /* orphaned import */ |
386 | stubgv = gv; |
387 | } |
388 | autogv = gv_autoload4(GvSTASH(stubgv), |
389 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
390 | if (autogv) |
391 | gv = autogv; |
392 | } |
393 | } |
44a8e56a |
394 | |
395 | return gv; |
396 | } |
397 | |
398 | GV* |
864dbfa3 |
399 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
400 | { |
401 | static char autoload[] = "AUTOLOAD"; |
402 | static STRLEN autolen = 8; |
403 | GV* gv; |
404 | CV* cv; |
405 | HV* varstash; |
406 | GV* vargv; |
407 | SV* varsv; |
408 | |
409 | if (len == autolen && strnEQ(name, autoload, autolen)) |
410 | return Nullgv; |
dc848c6f |
411 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
412 | return Nullgv; |
413 | cv = GvCV(gv); |
414 | |
ed850460 |
415 | if (!CvROOT(cv)) |
416 | return Nullgv; |
417 | |
dc848c6f |
418 | /* |
419 | * Inheriting AUTOLOAD for non-methods works ... for now. |
420 | */ |
b267980d |
421 | if (ckWARN(WARN_DEPRECATED) && !method && |
599cee73 |
422 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
cea2e8a9 |
423 | Perl_warner(aTHX_ WARN_DEPRECATED, |
dc848c6f |
424 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
425 | HvNAME(stash), (int)len, name); |
44a8e56a |
426 | |
427 | /* |
428 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
429 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
430 | * use that, but for lack of anything better we will use the sub's |
431 | * original package to look up $AUTOLOAD. |
432 | */ |
433 | varstash = GvSTASH(CvGV(cv)); |
434 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
3d35f11b |
435 | ENTER; |
436 | |
437 | #ifdef USE_THREADS |
4755096e |
438 | sv_lock((SV *)varstash); |
3d35f11b |
439 | #endif |
44a8e56a |
440 | if (!isGV(vargv)) |
441 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
3d35f11b |
442 | LEAVE; |
44a8e56a |
443 | varsv = GvSV(vargv); |
3d35f11b |
444 | #ifdef USE_THREADS |
4755096e |
445 | sv_lock(varsv); |
3d35f11b |
446 | #endif |
44a8e56a |
447 | sv_setpv(varsv, HvNAME(stash)); |
448 | sv_catpvn(varsv, "::", 2); |
449 | sv_catpvn(varsv, name, len); |
450 | SvTAINTED_off(varsv); |
a0d0e21e |
451 | return gv; |
452 | } |
453 | |
954c1994 |
454 | /* |
455 | =for apidoc gv_stashpv |
456 | |
386d01d6 |
457 | Returns a pointer to the stash for a specified package. C<name> should |
458 | be a valid UTF-8 string. If C<create> is set then the package will be |
459 | created if it does not already exist. If C<create> is not set and the |
460 | package does not exist then NULL is returned. |
954c1994 |
461 | |
462 | =cut |
463 | */ |
464 | |
a0d0e21e |
465 | HV* |
864dbfa3 |
466 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
467 | { |
dc437b57 |
468 | return gv_stashpvn(name, strlen(name), create); |
469 | } |
470 | |
471 | HV* |
864dbfa3 |
472 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
473 | { |
46fc3d4c |
474 | char smallbuf[256]; |
475 | char *tmpbuf; |
a0d0e21e |
476 | HV *stash; |
477 | GV *tmpgv; |
dc437b57 |
478 | |
46fc3d4c |
479 | if (namelen + 3 < sizeof smallbuf) |
480 | tmpbuf = smallbuf; |
481 | else |
482 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
483 | Copy(name,tmpbuf,namelen,char); |
484 | tmpbuf[namelen++] = ':'; |
485 | tmpbuf[namelen++] = ':'; |
486 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
487 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
488 | if (tmpbuf != smallbuf) |
489 | Safefree(tmpbuf); |
a0d0e21e |
490 | if (!tmpgv) |
491 | return 0; |
492 | if (!GvHV(tmpgv)) |
493 | GvHV(tmpgv) = newHV(); |
494 | stash = GvHV(tmpgv); |
495 | if (!HvNAME(stash)) |
496 | HvNAME(stash) = savepv(name); |
497 | return stash; |
463ee0b2 |
498 | } |
499 | |
954c1994 |
500 | /* |
501 | =for apidoc gv_stashsv |
502 | |
386d01d6 |
503 | Returns a pointer to the stash for a specified package, which must be a |
504 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
505 | |
506 | =cut |
507 | */ |
508 | |
a0d0e21e |
509 | HV* |
864dbfa3 |
510 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
511 | { |
dc437b57 |
512 | register char *ptr; |
513 | STRLEN len; |
514 | ptr = SvPV(sv,len); |
515 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
516 | } |
517 | |
518 | |
463ee0b2 |
519 | GV * |
864dbfa3 |
520 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
79072805 |
521 | { |
08105a92 |
522 | register const char *name = nambeg; |
463ee0b2 |
523 | register GV *gv = 0; |
79072805 |
524 | GV**gvp; |
79072805 |
525 | I32 len; |
08105a92 |
526 | register const char *namend; |
463ee0b2 |
527 | HV *stash = 0; |
79072805 |
528 | |
c07a80fd |
529 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
530 | name++; |
531 | |
79072805 |
532 | for (namend = name; *namend; namend++) { |
1d7c1841 |
533 | if ((*namend == ':' && namend[1] == ':') |
534 | || (*namend == '\'' && namend[1])) |
463ee0b2 |
535 | { |
463ee0b2 |
536 | if (!stash) |
3280af22 |
537 | stash = PL_defstash; |
dc437b57 |
538 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
539 | return Nullgv; |
463ee0b2 |
540 | |
85e6fe83 |
541 | len = namend - name; |
542 | if (len > 0) { |
3c78fafa |
543 | char smallbuf[256]; |
62b57502 |
544 | char *tmpbuf; |
62b57502 |
545 | |
3c78fafa |
546 | if (len + 3 < sizeof smallbuf) |
547 | tmpbuf = smallbuf; |
62b57502 |
548 | else |
549 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
550 | Copy(name, tmpbuf, len, char); |
551 | tmpbuf[len++] = ':'; |
552 | tmpbuf[len++] = ':'; |
553 | tmpbuf[len] = '\0'; |
463ee0b2 |
554 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
555 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
556 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
557 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
558 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
559 | else |
560 | GvMULTI_on(gv); |
561 | } |
3c78fafa |
562 | if (tmpbuf != smallbuf) |
62b57502 |
563 | Safefree(tmpbuf); |
3280af22 |
564 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
565 | return Nullgv; |
85e6fe83 |
566 | |
463ee0b2 |
567 | if (!(stash = GvHV(gv))) |
568 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
569 | |
463ee0b2 |
570 | if (!HvNAME(stash)) |
a0d0e21e |
571 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
572 | } |
573 | |
574 | if (*namend == ':') |
575 | namend++; |
576 | namend++; |
577 | name = namend; |
578 | if (!*name) |
3280af22 |
579 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
580 | } |
79072805 |
581 | } |
a0d0e21e |
582 | len = namend - name; |
583 | if (!len) |
584 | len = 1; |
463ee0b2 |
585 | |
586 | /* No stash in name, so see how we can default */ |
587 | |
588 | if (!stash) { |
7e2040f0 |
589 | if (isIDFIRST_lazy(name)) { |
9607fc9c |
590 | bool global = FALSE; |
591 | |
463ee0b2 |
592 | if (isUPPER(*name)) { |
9d116dd7 |
593 | if (*name == 'S' && ( |
594 | strEQ(name, "SIG") || |
595 | strEQ(name, "STDIN") || |
596 | strEQ(name, "STDOUT") || |
597 | strEQ(name, "STDERR"))) |
598 | global = TRUE; |
599 | else if (*name == 'I' && strEQ(name, "INC")) |
600 | global = TRUE; |
601 | else if (*name == 'E' && strEQ(name, "ENV")) |
602 | global = TRUE; |
463ee0b2 |
603 | else if (*name == 'A' && ( |
604 | strEQ(name, "ARGV") || |
9d116dd7 |
605 | strEQ(name, "ARGVOUT"))) |
463ee0b2 |
606 | global = TRUE; |
607 | } |
608 | else if (*name == '_' && !name[1]) |
609 | global = TRUE; |
9607fc9c |
610 | |
463ee0b2 |
611 | if (global) |
3280af22 |
612 | stash = PL_defstash; |
613 | else if ((COP*)PL_curcop == &PL_compiling) { |
614 | stash = PL_curstash; |
615 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
616 | sv_type != SVt_PVCV && |
617 | sv_type != SVt_PVGV && |
4633a7c4 |
618 | sv_type != SVt_PVFM && |
c07a80fd |
619 | sv_type != SVt_PVIO && |
377b8fbc |
620 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
621 | { |
4633a7c4 |
622 | gvp = (GV**)hv_fetch(stash,name,len,0); |
623 | if (!gvp || |
3280af22 |
624 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
625 | SvTYPE(*gvp) != SVt_PVGV) |
626 | { |
4633a7c4 |
627 | stash = 0; |
a5f75d66 |
628 | } |
155aba94 |
629 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
630 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
631 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
632 | { |
cea2e8a9 |
633 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
634 | sv_type == SVt_PVAV ? '@' : |
635 | sv_type == SVt_PVHV ? '%' : '$', |
636 | name); |
8ebc5c01 |
637 | if (GvCVu(*gvp)) |
cc507455 |
638 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
639 | stash = 0; |
4633a7c4 |
640 | } |
a0d0e21e |
641 | } |
85e6fe83 |
642 | } |
463ee0b2 |
643 | else |
1d7c1841 |
644 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
645 | } |
646 | else |
3280af22 |
647 | stash = PL_defstash; |
463ee0b2 |
648 | } |
649 | |
650 | /* By this point we should have a stash and a name */ |
651 | |
a0d0e21e |
652 | if (!stash) { |
5a844595 |
653 | if (add) { |
654 | qerror(Perl_mess(aTHX_ |
655 | "Global symbol \"%s%s\" requires explicit package name", |
656 | (sv_type == SVt_PV ? "$" |
657 | : sv_type == SVt_PVAV ? "@" |
658 | : sv_type == SVt_PVHV ? "%" |
659 | : ""), name)); |
f180df80 |
660 | stash = PL_nullstash; |
a0d0e21e |
661 | } |
f180df80 |
662 | else |
663 | return Nullgv; |
a0d0e21e |
664 | } |
665 | |
666 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
667 | return Nullgv; |
668 | |
79072805 |
669 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
670 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
671 | return Nullgv; |
672 | gv = *gvp; |
673 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
674 | if (add) { |
a5f75d66 |
675 | GvMULTI_on(gv); |
a0d0e21e |
676 | gv_init_sv(gv, sv_type); |
677 | } |
79072805 |
678 | return gv; |
55d729e4 |
679 | } else if (add & GV_NOINIT) { |
680 | return gv; |
79072805 |
681 | } |
93a17b20 |
682 | |
683 | /* Adding a new symbol */ |
684 | |
0453d815 |
685 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
686 | Perl_warner(aTHX_ WARN_INTERNAL, "Had to create %s unexpectedly", nambeg); |
55d729e4 |
687 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
688 | gv_init_sv(gv, sv_type); |
93a17b20 |
689 | |
0453d815 |
690 | if (isLEXWARN_on && isALPHA(name[0]) && ! ckWARN(WARN_ONCE)) |
691 | GvMULTI_on(gv) ; |
692 | |
93a17b20 |
693 | /* set up magic where warranted */ |
694 | switch (*name) { |
a0d0e21e |
695 | case 'A': |
696 | if (strEQ(name, "ARGV")) { |
697 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
698 | } |
699 | break; |
a0d0e21e |
700 | case 'E': |
701 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
702 | GvMULTI_on(gv); |
a0d0e21e |
703 | break; |
463ee0b2 |
704 | case 'I': |
705 | if (strEQ(name, "ISA")) { |
706 | AV* av = GvAVn(gv); |
a5f75d66 |
707 | GvMULTI_on(gv); |
a0d0e21e |
708 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
93965878 |
709 | /* NOTE: No support for tied ISA */ |
55d729e4 |
710 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
711 | && AvFILLp(av) == -1) |
85e6fe83 |
712 | { |
a0d0e21e |
713 | char *pname; |
79cb57f6 |
714 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
dc437b57 |
715 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
716 | av_push(av, newSVpvn(pname = "DB_File",7)); |
dc437b57 |
717 | gv_stashpvn(pname, 7, TRUE); |
79cb57f6 |
718 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
dc437b57 |
719 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
720 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
dc437b57 |
721 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
722 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
dc437b57 |
723 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
724 | } |
463ee0b2 |
725 | } |
726 | break; |
a0d0e21e |
727 | case 'O': |
728 | if (strEQ(name, "OVERLOAD")) { |
729 | HV* hv = GvHVn(gv); |
a5f75d66 |
730 | GvMULTI_on(gv); |
fd345fa8 |
731 | hv_magic(hv, Nullgv, 'A'); |
a0d0e21e |
732 | } |
733 | break; |
93a17b20 |
734 | case 'S': |
735 | if (strEQ(name, "SIG")) { |
736 | HV *hv; |
dc437b57 |
737 | I32 i; |
1d7c1841 |
738 | if (!PL_psig_ptr) { |
739 | int sig_num[] = { SIG_NUM }; |
740 | New(73, PL_psig_ptr, sizeof(sig_num)/sizeof(*sig_num), SV*); |
741 | New(73, PL_psig_name, sizeof(sig_num)/sizeof(*sig_num), SV*); |
742 | } |
743 | GvMULTI_on(gv); |
744 | hv = GvHVn(gv); |
fd345fa8 |
745 | hv_magic(hv, Nullgv, 'S'); |
1d7c1841 |
746 | for (i = 1; PL_sig_name[i]; i++) { |
dc437b57 |
747 | SV ** init; |
1d7c1841 |
748 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
749 | if (init) |
750 | sv_setsv(*init, &PL_sv_undef); |
22c35a8c |
751 | PL_psig_ptr[i] = 0; |
752 | PL_psig_name[i] = 0; |
dc437b57 |
753 | } |
93a17b20 |
754 | } |
755 | break; |
09bef843 |
756 | case 'V': |
757 | if (strEQ(name, "VERSION")) |
758 | GvMULTI_on(gv); |
759 | break; |
93a17b20 |
760 | |
761 | case '&': |
463ee0b2 |
762 | if (len > 1) |
763 | break; |
3280af22 |
764 | PL_sawampersand = TRUE; |
a0d0e21e |
765 | goto ro_magicalize; |
93a17b20 |
766 | |
767 | case '`': |
463ee0b2 |
768 | if (len > 1) |
769 | break; |
3280af22 |
770 | PL_sawampersand = TRUE; |
a0d0e21e |
771 | goto ro_magicalize; |
93a17b20 |
772 | |
773 | case '\'': |
463ee0b2 |
774 | if (len > 1) |
775 | break; |
3280af22 |
776 | PL_sawampersand = TRUE; |
a0d0e21e |
777 | goto ro_magicalize; |
93a17b20 |
778 | |
779 | case ':': |
463ee0b2 |
780 | if (len > 1) |
781 | break; |
3280af22 |
782 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 |
783 | goto magicalize; |
784 | |
ff0cee69 |
785 | case '?': |
786 | if (len > 1) |
787 | break; |
788 | #ifdef COMPLEX_STATUS |
07f14f54 |
789 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
ff0cee69 |
790 | #endif |
791 | goto magicalize; |
792 | |
067391ea |
793 | case '!': |
4318d5a0 |
794 | if (len > 1) |
067391ea |
795 | break; |
3280af22 |
796 | if (sv_type > SVt_PV && PL_curcop != &PL_compiling) { |
067391ea |
797 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
265f5c4a |
798 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
067391ea |
799 | dSP; |
800 | PUTBACK; |
cea2e8a9 |
801 | require_pv("Errno.pm"); |
067391ea |
802 | SPAGAIN; |
803 | stash = gv_stashpvn("Errno",5,FALSE); |
804 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
cea2e8a9 |
805 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
067391ea |
806 | } |
807 | } |
808 | goto magicalize; |
6cef1e77 |
809 | case '-': |
810 | if (len > 1) |
811 | break; |
812 | else { |
813 | AV* av = GvAVn(gv); |
814 | sv_magic((SV*)av, Nullsv, 'D', Nullch, 0); |
03a27ae7 |
815 | SvREADONLY_on(av); |
6cef1e77 |
816 | } |
817 | goto magicalize; |
93a17b20 |
818 | case '#': |
a0d0e21e |
819 | case '*': |
599cee73 |
820 | if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV) |
cea2e8a9 |
821 | Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name); |
a0d0e21e |
822 | /* FALL THROUGH */ |
823 | case '[': |
93a17b20 |
824 | case '^': |
825 | case '~': |
826 | case '=': |
93a17b20 |
827 | case '%': |
828 | case '.': |
93a17b20 |
829 | case '(': |
830 | case ')': |
831 | case '<': |
832 | case '>': |
833 | case ',': |
834 | case '\\': |
835 | case '/': |
16070b82 |
836 | case '\001': /* $^A */ |
837 | case '\003': /* $^C */ |
838 | case '\004': /* $^D */ |
839 | case '\005': /* $^E */ |
840 | case '\006': /* $^F */ |
841 | case '\010': /* $^H */ |
842 | case '\011': /* $^I, NOT \t in EBCDIC */ |
16070b82 |
843 | case '\020': /* $^P */ |
844 | case '\024': /* $^T */ |
463ee0b2 |
845 | if (len > 1) |
846 | break; |
847 | goto magicalize; |
d8ce0c9a |
848 | case '|': |
849 | if (len > 1) |
850 | break; |
851 | sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
852 | goto magicalize; |
ac27b0f5 |
853 | case '\017': /* $^O & $^OPEN */ |
854 | if (len > 1 && strNE(name, "\017PEN")) |
855 | break; |
856 | goto magicalize; |
16070b82 |
857 | case '\023': /* $^S */ |
6cef1e77 |
858 | if (len > 1) |
859 | break; |
860 | goto ro_magicalize; |
6a818117 |
861 | case '\027': /* $^W & $^WARNING_BITS */ |
a50e31ad |
862 | if (len > 1 && strNE(name, "\027ARNING_BITS") |
863 | && strNE(name, "\027IDE_SYSTEM_CALLS")) |
4438c4b7 |
864 | break; |
865 | goto magicalize; |
463ee0b2 |
866 | |
a0d0e21e |
867 | case '+': |
6cef1e77 |
868 | if (len > 1) |
869 | break; |
870 | else { |
871 | AV* av = GvAVn(gv); |
872 | sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0); |
03a27ae7 |
873 | SvREADONLY_on(av); |
6cef1e77 |
874 | } |
875 | /* FALL THROUGH */ |
463ee0b2 |
876 | case '1': |
877 | case '2': |
878 | case '3': |
879 | case '4': |
880 | case '5': |
881 | case '6': |
882 | case '7': |
883 | case '8': |
884 | case '9': |
a0d0e21e |
885 | ro_magicalize: |
886 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
887 | magicalize: |
463ee0b2 |
888 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
889 | break; |
890 | |
16070b82 |
891 | case '\014': /* $^L */ |
463ee0b2 |
892 | if (len > 1) |
893 | break; |
93a17b20 |
894 | sv_setpv(GvSV(gv),"\f"); |
3280af22 |
895 | PL_formfeed = GvSV(gv); |
93a17b20 |
896 | break; |
897 | case ';': |
463ee0b2 |
898 | if (len > 1) |
899 | break; |
93a17b20 |
900 | sv_setpv(GvSV(gv),"\034"); |
901 | break; |
463ee0b2 |
902 | case ']': |
903 | if (len == 1) { |
f86702cc |
904 | SV *sv = GvSV(gv); |
5089c844 |
905 | (void)SvUPGRADE(sv, SVt_PVNV); |
6a6ba966 |
906 | Perl_sv_setpvf(aTHX_ sv, |
907 | #if defined(PERL_SUBVERSION) && (PERL_SUBVERSION > 0) |
908 | "%8.6" |
909 | #else |
910 | "%5.3" |
911 | #endif |
912 | NVff, |
913 | SvNVX(PL_patchlevel)); |
5089c844 |
914 | SvNVX(sv) = SvNVX(PL_patchlevel); |
915 | SvNOK_on(sv); |
5089c844 |
916 | SvREADONLY_on(sv); |
93a17b20 |
917 | } |
918 | break; |
16070b82 |
919 | case '\026': /* $^V */ |
920 | if (len == 1) { |
921 | SV *sv = GvSV(gv); |
922 | GvSV(gv) = SvREFCNT_inc(PL_patchlevel); |
923 | SvREFCNT_dec(sv); |
924 | } |
925 | break; |
79072805 |
926 | } |
93a17b20 |
927 | return gv; |
79072805 |
928 | } |
929 | |
930 | void |
43693395 |
931 | Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
932 | { |
933 | HV *hv = GvSTASH(gv); |
934 | if (!hv) { |
935 | (void)SvOK_off(sv); |
936 | return; |
937 | } |
938 | sv_setpv(sv, prefix ? prefix : ""); |
939 | if (keepmain || strNE(HvNAME(hv), "main")) { |
940 | sv_catpv(sv,HvNAME(hv)); |
941 | sv_catpvn(sv,"::", 2); |
942 | } |
943 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
944 | } |
945 | |
946 | void |
864dbfa3 |
947 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
948 | { |
949 | HV *hv = GvSTASH(gv); |
f967eb5f |
950 | if (!hv) { |
155aba94 |
951 | (void)SvOK_off(sv); |
79072805 |
952 | return; |
f967eb5f |
953 | } |
954 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
955 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
956 | sv_catpvn(sv,"::", 2); |
79072805 |
957 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
958 | } |
959 | |
960 | void |
43693395 |
961 | Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
962 | { |
963 | GV *egv = GvEGV(gv); |
964 | if (!egv) |
965 | egv = gv; |
966 | gv_fullname4(sv, egv, prefix, keepmain); |
967 | } |
968 | |
969 | void |
864dbfa3 |
970 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
971 | { |
f967eb5f |
972 | GV *egv = GvEGV(gv); |
748a9306 |
973 | if (!egv) |
974 | egv = gv; |
f6aff53a |
975 | gv_fullname3(sv, egv, prefix); |
976 | } |
977 | |
978 | /* XXX compatibility with versions <= 5.003. */ |
979 | void |
864dbfa3 |
980 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
981 | { |
982 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
983 | } |
984 | |
985 | /* XXX compatibility with versions <= 5.003. */ |
986 | void |
864dbfa3 |
987 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
988 | { |
989 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
990 | } |
991 | |
992 | IO * |
864dbfa3 |
993 | Perl_newIO(pTHX) |
79072805 |
994 | { |
995 | IO *io; |
8990e307 |
996 | GV *iogv; |
997 | |
998 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
999 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
1000 | SvREFCNT(io) = 1; |
1001 | SvOBJECT_on(io); |
c9de509e |
1002 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d |
1003 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1004 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
c9de509e |
1005 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
1006 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
1007 | return io; |
1008 | } |
1009 | |
1010 | void |
864dbfa3 |
1011 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1012 | { |
1013 | register HE *entry; |
1014 | register I32 i; |
1015 | register GV *gv; |
463ee0b2 |
1016 | HV *hv; |
1017 | |
8990e307 |
1018 | if (!HvARRAY(stash)) |
1019 | return; |
a0d0e21e |
1020 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
1021 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
1022 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
1023 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
1024 | { |
19b6c847 |
1025 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1026 | gv_check(hv); /* nested package */ |
1027 | } |
dc437b57 |
1028 | else if (isALPHA(*HeKEY(entry))) { |
1d7c1841 |
1029 | char *file; |
dc437b57 |
1030 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1031 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1032 | continue; |
1d7c1841 |
1033 | file = GvFILE(gv); |
1034 | /* performance hack: if filename is absolute and it's a standard |
1035 | * module, don't bother warning */ |
1036 | if (file |
1037 | && PERL_FILE_IS_ABSOLUTE(file) |
1038 | && (instr(file, "/lib/") || instr(file, ".pm"))) |
1039 | { |
8990e307 |
1040 | continue; |
1d7c1841 |
1041 | } |
1042 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1043 | #ifdef USE_ITHREADS |
1044 | CopFILE(PL_curcop) = file; /* set for warning */ |
1045 | #else |
1046 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1047 | #endif |
cea2e8a9 |
1048 | Perl_warner(aTHX_ WARN_ONCE, |
599cee73 |
1049 | "Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
1050 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
1051 | } |
79072805 |
1052 | } |
1053 | } |
1054 | } |
1055 | |
1056 | GV * |
864dbfa3 |
1057 | Perl_newGVgen(pTHX_ char *pack) |
79072805 |
1058 | { |
cea2e8a9 |
1059 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1060 | TRUE, SVt_PVGV); |
79072805 |
1061 | } |
1062 | |
1063 | /* hopefully this is only called on local symbol table entries */ |
1064 | |
1065 | GP* |
864dbfa3 |
1066 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1067 | { |
1d7c1841 |
1068 | if (!gp) |
1069 | return (GP*)NULL; |
79072805 |
1070 | gp->gp_refcnt++; |
44a8e56a |
1071 | if (gp->gp_cv) { |
1072 | if (gp->gp_cvgen) { |
1073 | /* multi-named GPs cannot be used for method cache */ |
1074 | SvREFCNT_dec(gp->gp_cv); |
1075 | gp->gp_cv = Nullcv; |
1076 | gp->gp_cvgen = 0; |
1077 | } |
1078 | else { |
1079 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1080 | PL_sub_generation++; |
44a8e56a |
1081 | } |
1082 | } |
79072805 |
1083 | return gp; |
79072805 |
1084 | } |
1085 | |
1086 | void |
864dbfa3 |
1087 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1088 | { |
79072805 |
1089 | GP* gp; |
1090 | |
1091 | if (!gv || !(gp = GvGP(gv))) |
1092 | return; |
f248d071 |
1093 | if (gp->gp_refcnt == 0) { |
1094 | if (ckWARN_d(WARN_INTERNAL)) |
1095 | Perl_warner(aTHX_ WARN_INTERNAL, |
1096 | "Attempt to free unreferenced glob pointers"); |
79072805 |
1097 | return; |
1098 | } |
44a8e56a |
1099 | if (gp->gp_cv) { |
1100 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1101 | PL_sub_generation++; |
44a8e56a |
1102 | } |
748a9306 |
1103 | if (--gp->gp_refcnt > 0) { |
1104 | if (gp->gp_egv == gv) |
1105 | gp->gp_egv = 0; |
79072805 |
1106 | return; |
748a9306 |
1107 | } |
79072805 |
1108 | |
8990e307 |
1109 | SvREFCNT_dec(gp->gp_sv); |
1110 | SvREFCNT_dec(gp->gp_av); |
1111 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
1112 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
1113 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
1114 | SvREFCNT_dec(gp->gp_form); |
1115 | |
79072805 |
1116 | Safefree(gp); |
1117 | GvGP(gv) = 0; |
1118 | } |
1119 | |
1120 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
1121 | #define MICROPORT |
1122 | #endif |
1123 | |
1124 | #ifdef MICROPORT /* Microport 2.4 hack */ |
1125 | AV *GvAVn(gv) |
1126 | register GV *gv; |
1127 | { |
b267980d |
1128 | if (GvGP(gv)->gp_av) |
79072805 |
1129 | return GvGP(gv)->gp_av; |
1130 | else |
1131 | return GvGP(gv_AVadd(gv))->gp_av; |
1132 | } |
1133 | |
1134 | HV *GvHVn(gv) |
1135 | register GV *gv; |
1136 | { |
1137 | if (GvGP(gv)->gp_hv) |
1138 | return GvGP(gv)->gp_hv; |
1139 | else |
1140 | return GvGP(gv_HVadd(gv))->gp_hv; |
1141 | } |
1142 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
1143 | |
a0d0e21e |
1144 | /* Updates and caches the CV's */ |
1145 | |
1146 | bool |
864dbfa3 |
1147 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1148 | { |
a0d0e21e |
1149 | GV* gv; |
1150 | CV* cv; |
1151 | MAGIC* mg=mg_find((SV*)stash,'c'); |
8ac85365 |
1152 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1153 | AMT amt; |
2d8e6c8d |
1154 | STRLEN n_a; |
155aba94 |
1155 | #ifdef OVERLOAD_VIA_HASH |
1156 | GV** gvp; |
1157 | HV* hv; |
1158 | #endif |
a0d0e21e |
1159 | |
3280af22 |
1160 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1161 | && amtp->was_ok_sub == PL_sub_generation) |
a6006777 |
1162 | return AMT_AMAGIC(amtp); |
1163 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
1164 | int i; |
a6006777 |
1165 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
1166 | if (amtp->table[i]) { |
1167 | SvREFCNT_dec(amtp->table[i]); |
1168 | } |
1169 | } |
1170 | } |
a0d0e21e |
1171 | sv_unmagic((SV*)stash, 'c'); |
1172 | |
cea2e8a9 |
1173 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
a0d0e21e |
1174 | |
3280af22 |
1175 | amt.was_ok_am = PL_amagic_generation; |
1176 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1177 | amt.fallback = AMGfallNO; |
1178 | amt.flags = 0; |
1179 | |
1180 | #ifdef OVERLOAD_VIA_HASH |
1181 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
3280af22 |
1182 | if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) { |
a0d0e21e |
1183 | int filled=0; |
1184 | int i; |
1185 | char *cp; |
a0d0e21e |
1186 | SV* sv; |
1187 | SV** svp; |
a0d0e21e |
1188 | |
22c35a8c |
1189 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a0d0e21e |
1190 | |
22c35a8c |
1191 | if (( cp = (char *)PL_AMG_names[0] ) && |
a6006777 |
1192 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
1193 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1194 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1195 | } |
a6006777 |
1196 | for (i = 1; i < NofAMmeth; i++) { |
1197 | cv = 0; |
22c35a8c |
1198 | cp = (char *)PL_AMG_names[i]; |
b267980d |
1199 | |
a6006777 |
1200 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
3280af22 |
1201 | if (svp && ((sv = *svp) != &PL_sv_undef)) { |
a0d0e21e |
1202 | switch (SvTYPE(sv)) { |
1203 | default: |
1204 | if (!SvROK(sv)) { |
1205 | if (!SvOK(sv)) break; |
2d8e6c8d |
1206 | gv = gv_fetchmethod(stash, SvPV(sv, n_a)); |
a0d0e21e |
1207 | if (gv) cv = GvCV(gv); |
1208 | break; |
1209 | } |
1210 | cv = (CV*)SvRV(sv); |
1211 | if (SvTYPE(cv) == SVt_PVCV) |
1212 | break; |
1213 | /* FALL THROUGH */ |
1214 | case SVt_PVHV: |
1215 | case SVt_PVAV: |
cea2e8a9 |
1216 | Perl_croak(aTHX_ "Not a subroutine reference in overload table"); |
a0d0e21e |
1217 | return FALSE; |
1218 | case SVt_PVCV: |
8ebc5c01 |
1219 | cv = (CV*)sv; |
1220 | break; |
a0d0e21e |
1221 | case SVt_PVGV: |
8ebc5c01 |
1222 | if (!(cv = GvCVu((GV*)sv))) |
f6ec51f7 |
1223 | cv = sv_2cv(sv, &stash, &gv, FALSE); |
8ebc5c01 |
1224 | break; |
a0d0e21e |
1225 | } |
1226 | if (cv) filled=1; |
1227 | else { |
cea2e8a9 |
1228 | Perl_croak(aTHX_ "Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1229 | cp,HvNAME(stash)); |
1230 | return FALSE; |
1231 | } |
1232 | } |
a6006777 |
1233 | #else |
1234 | { |
1235 | int filled = 0; |
1236 | int i; |
9607fc9c |
1237 | const char *cp; |
a6006777 |
1238 | SV* sv = NULL; |
a6006777 |
1239 | |
22c35a8c |
1240 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1241 | |
155aba94 |
1242 | if ((cp = PL_AMG_names[0])) { |
a6006777 |
1243 | /* Try to find via inheritance. */ |
774d564b |
1244 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
155aba94 |
1245 | if (gv) |
1246 | sv = GvSV(gv); |
1247 | |
1248 | if (!gv) |
1249 | goto no_table; |
1250 | else if (SvTRUE(sv)) |
1251 | amt.fallback=AMGfallYES; |
1252 | else if (SvOK(sv)) |
1253 | amt.fallback=AMGfallNEVER; |
a6006777 |
1254 | } |
1255 | |
1256 | for (i = 1; i < NofAMmeth; i++) { |
cea2e8a9 |
1257 | SV *cookie = sv_2mortal(Perl_newSVpvf(aTHX_ "(%s", cp = PL_AMG_names[i])); |
1258 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
44a8e56a |
1259 | cp, HvNAME(stash)) ); |
46fc3d4c |
1260 | /* don't fill the cache while looking up! */ |
1261 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
1262 | cv = 0; |
44a8e56a |
1263 | if(gv && (cv = GvCV(gv))) { |
44a8e56a |
1264 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1265 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1266 | /* GvSV contains the name of the method. */ |
1267 | GV *ngv; |
1268 | |
b267980d |
1269 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
2d8e6c8d |
1270 | SvPV(GvSV(gv), n_a), cp, HvNAME(stash)) ); |
b267980d |
1271 | if (!SvPOK(GvSV(gv)) |
dc848c6f |
1272 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1273 | FALSE))) |
1274 | { |
44a8e56a |
1275 | /* Can be an import stub (created by `can'). */ |
1276 | if (GvCVGEN(gv)) { |
b267980d |
1277 | Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1278 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1279 | cp, HvNAME(stash)); |
1280 | } else |
b267980d |
1281 | Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1282 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1283 | cp, HvNAME(stash)); |
1284 | } |
dc848c6f |
1285 | cv = GvCV(gv = ngv); |
44a8e56a |
1286 | } |
cea2e8a9 |
1287 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
44a8e56a |
1288 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1289 | GvNAME(CvGV(cv))) ); |
1290 | filled = 1; |
1291 | } |
b267980d |
1292 | #endif |
a6006777 |
1293 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1294 | } |
a0d0e21e |
1295 | if (filled) { |
a6006777 |
1296 | AMT_AMAGIC_on(&amt); |
1297 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1298 | return TRUE; |
1299 | } |
1300 | } |
a6006777 |
1301 | /* Here we have no table: */ |
774d564b |
1302 | no_table: |
a6006777 |
1303 | AMT_AMAGIC_off(&amt); |
1304 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1305 | return FALSE; |
1306 | } |
1307 | |
a0d0e21e |
1308 | SV* |
864dbfa3 |
1309 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1310 | { |
b267980d |
1311 | MAGIC *mg; |
1312 | CV *cv; |
a0d0e21e |
1313 | CV **cvp=NULL, **ocvp=NULL; |
1314 | AMT *amtp, *oamtp; |
1315 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
ee239bfe |
1316 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
a0d0e21e |
1317 | HV* stash; |
1318 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1319 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
b267980d |
1320 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1321 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1322 | : (CV **) NULL)) |
b267980d |
1323 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1324 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1325 | * usual method */ |
1326 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1327 | lr = -1; /* Call method for left argument */ |
1328 | } else { |
1329 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1330 | int logic; |
1331 | |
1332 | /* look for substituted methods */ |
ee239bfe |
1333 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1334 | switch (method) { |
1335 | case inc_amg: |
ee239bfe |
1336 | force_cpy = 1; |
1337 | if ((cv = cvp[off=add_ass_amg]) |
1338 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1339 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1340 | } |
1341 | break; |
1342 | case dec_amg: |
ee239bfe |
1343 | force_cpy = 1; |
1344 | if ((cv = cvp[off = subtr_ass_amg]) |
1345 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1346 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1347 | } |
1348 | break; |
1349 | case bool__amg: |
1350 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1351 | break; |
1352 | case numer_amg: |
1353 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1354 | break; |
1355 | case string_amg: |
1356 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1357 | break; |
dc437b57 |
1358 | case not_amg: |
b267980d |
1359 | (void)((cv = cvp[off=bool__amg]) |
dc437b57 |
1360 | || (cv = cvp[off=numer_amg]) |
1361 | || (cv = cvp[off=string_amg])); |
1362 | postpr = 1; |
1363 | break; |
748a9306 |
1364 | case copy_amg: |
1365 | { |
76e3520e |
1366 | /* |
1367 | * SV* ref causes confusion with the interpreter variable of |
1368 | * the same name |
1369 | */ |
1370 | SV* tmpRef=SvRV(left); |
1371 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1372 | /* |
1373 | * Just to be extra cautious. Maybe in some |
1374 | * additional cases sv_setsv is safe, too. |
1375 | */ |
76e3520e |
1376 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1377 | SvOBJECT_on(newref); |
76e3520e |
1378 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1379 | return newref; |
1380 | } |
1381 | } |
1382 | break; |
a0d0e21e |
1383 | case abs_amg: |
b267980d |
1384 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1385 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1386 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1387 | if (off1==lt_amg) { |
748a9306 |
1388 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1389 | lt_amg,AMGf_noright); |
1390 | logic = SvTRUE(lessp); |
1391 | } else { |
748a9306 |
1392 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1393 | ncmp_amg,AMGf_noright); |
1394 | logic = (SvNV(lessp) < 0); |
1395 | } |
1396 | if (logic) { |
1397 | if (off==subtr_amg) { |
1398 | right = left; |
748a9306 |
1399 | left = nullsv; |
a0d0e21e |
1400 | lr = 1; |
1401 | } |
1402 | } else { |
1403 | return left; |
1404 | } |
1405 | } |
1406 | break; |
1407 | case neg_amg: |
155aba94 |
1408 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1409 | right = left; |
1410 | left = sv_2mortal(newSViv(0)); |
1411 | lr = 1; |
1412 | } |
1413 | break; |
f5284f61 |
1414 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1415 | /* FAIL safe */ |
1416 | return NULL; /* Delegate operation to standard mechanisms. */ |
1417 | break; |
f5284f61 |
1418 | case to_sv_amg: |
1419 | case to_av_amg: |
1420 | case to_hv_amg: |
1421 | case to_gv_amg: |
1422 | case to_cv_amg: |
1423 | /* FAIL safe */ |
b267980d |
1424 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1425 | break; |
a0d0e21e |
1426 | default: |
1427 | goto not_found; |
1428 | } |
1429 | if (!cv) goto not_found; |
1430 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1431 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
b267980d |
1432 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1433 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1434 | : (CV **) NULL)) |
a0d0e21e |
1435 | && (cv = cvp[off=method])) { /* Method for right |
1436 | * argument found */ |
1437 | lr=1; |
b267980d |
1438 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1439 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1440 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1441 | && !(flags & AMGf_unary)) { |
1442 | /* We look for substitution for |
1443 | * comparison operations and |
fc36a67e |
1444 | * concatenation */ |
a0d0e21e |
1445 | if (method==concat_amg || method==concat_ass_amg |
1446 | || method==repeat_amg || method==repeat_ass_amg) { |
1447 | return NULL; /* Delegate operation to string conversion */ |
1448 | } |
1449 | off = -1; |
1450 | switch (method) { |
1451 | case lt_amg: |
1452 | case le_amg: |
1453 | case gt_amg: |
1454 | case ge_amg: |
1455 | case eq_amg: |
1456 | case ne_amg: |
1457 | postpr = 1; off=ncmp_amg; break; |
1458 | case slt_amg: |
1459 | case sle_amg: |
1460 | case sgt_amg: |
1461 | case sge_amg: |
1462 | case seq_amg: |
1463 | case sne_amg: |
1464 | postpr = 1; off=scmp_amg; break; |
1465 | } |
1466 | if (off != -1) cv = cvp[off]; |
1467 | if (!cv) { |
1468 | goto not_found; |
1469 | } |
1470 | } else { |
a6006777 |
1471 | not_found: /* No method found, either report or croak */ |
b267980d |
1472 | switch (method) { |
1473 | case to_sv_amg: |
1474 | case to_av_amg: |
1475 | case to_hv_amg: |
1476 | case to_gv_amg: |
1477 | case to_cv_amg: |
1478 | /* FAIL safe */ |
1479 | return left; /* Delegate operation to standard mechanisms. */ |
1480 | break; |
1481 | } |
a0d0e21e |
1482 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1483 | notfound = 1; lr = -1; |
1484 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1485 | notfound = 1; lr = 1; |
1486 | } else { |
46fc3d4c |
1487 | SV *msg; |
774d564b |
1488 | if (off==-1) off=method; |
b267980d |
1489 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
46fc3d4c |
1490 | "Operation `%s': no method found,%sargument %s%s%s%s", |
22c35a8c |
1491 | PL_AMG_names[method + assignshift], |
e7ea3e70 |
1492 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1493 | SvAMAGIC(left)? |
a0d0e21e |
1494 | "in overloaded package ": |
1495 | "has no overloaded magic", |
b267980d |
1496 | SvAMAGIC(left)? |
a0d0e21e |
1497 | HvNAME(SvSTASH(SvRV(left))): |
1498 | "", |
b267980d |
1499 | SvAMAGIC(right)? |
e7ea3e70 |
1500 | ",\n\tright argument in overloaded package ": |
b267980d |
1501 | (flags & AMGf_unary |
e7ea3e70 |
1502 | ? "" |
1503 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1504 | SvAMAGIC(right)? |
a0d0e21e |
1505 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1506 | "")); |
a0d0e21e |
1507 | if (amtp && amtp->fallback >= AMGfallYES) { |
cea2e8a9 |
1508 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
a0d0e21e |
1509 | } else { |
894356b3 |
1510 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1511 | } |
1512 | return NULL; |
1513 | } |
ee239bfe |
1514 | force_cpy = force_cpy || assign; |
a0d0e21e |
1515 | } |
1516 | } |
1517 | if (!notfound) { |
b267980d |
1518 | DEBUG_o( Perl_deb(aTHX_ |
46fc3d4c |
1519 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
22c35a8c |
1520 | PL_AMG_names[off], |
748a9306 |
1521 | method+assignshift==off? "" : |
1522 | " (initially `", |
1523 | method+assignshift==off? "" : |
22c35a8c |
1524 | PL_AMG_names[method+assignshift], |
748a9306 |
1525 | method+assignshift==off? "" : "')", |
1526 | flags & AMGf_unary? "" : |
1527 | lr==1 ? " for right argument": " for left argument", |
1528 | flags & AMGf_unary? " for argument" : "", |
b267980d |
1529 | HvNAME(stash), |
a0d0e21e |
1530 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1531 | } |
748a9306 |
1532 | /* Since we use shallow copy during assignment, we need |
1533 | * to dublicate the contents, probably calling user-supplied |
1534 | * version of copy operator |
1535 | */ |
ee239bfe |
1536 | /* We need to copy in following cases: |
1537 | * a) Assignment form was called. |
1538 | * assignshift==1, assign==T, method + 1 == off |
1539 | * b) Increment or decrement, called directly. |
1540 | * assignshift==0, assign==0, method + 0 == off |
1541 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1542 | * assignshift==0, assign==T, |
ee239bfe |
1543 | * force_cpy == T |
1544 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1545 | * assignshift==0, assign==0, |
ee239bfe |
1546 | * force_cpy == T |
1547 | * e) Assignment form translated to nomethod. |
1548 | * assignshift==1, assign==T, method + 1 != off |
1549 | * force_cpy == T |
1550 | */ |
1551 | /* off is method, method+assignshift, or a result of opcode substitution. |
1552 | * In the latter case assignshift==0, so only notfound case is important. |
1553 | */ |
1554 | if (( (method + assignshift == off) |
1555 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1556 | || force_cpy) |
1557 | RvDEEPCP(left); |
a0d0e21e |
1558 | { |
1559 | dSP; |
1560 | BINOP myop; |
1561 | SV* res; |
54310121 |
1562 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1563 | |
54310121 |
1564 | CATCH_SET(TRUE); |
a0d0e21e |
1565 | Zero(&myop, 1, BINOP); |
1566 | myop.op_last = (OP *) &myop; |
1567 | myop.op_next = Nullop; |
54310121 |
1568 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1569 | |
e788e7d3 |
1570 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1571 | ENTER; |
462e5cf6 |
1572 | SAVEOP(); |
533c011a |
1573 | PL_op = (OP *) &myop; |
3280af22 |
1574 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1575 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1576 | PUTBACK; |
cea2e8a9 |
1577 | pp_pushmark(); |
a0d0e21e |
1578 | |
924508f0 |
1579 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1580 | PUSHs(lr>0? right: left); |
1581 | PUSHs(lr>0? left: right); |
3280af22 |
1582 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1583 | if (notfound) { |
22c35a8c |
1584 | PUSHs( sv_2mortal(newSVpv((char *)PL_AMG_names[method + assignshift],0))); |
a0d0e21e |
1585 | } |
1586 | PUSHs((SV*)cv); |
1587 | PUTBACK; |
1588 | |
155aba94 |
1589 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1590 | CALLRUNOPS(aTHX); |
a0d0e21e |
1591 | LEAVE; |
1592 | SPAGAIN; |
1593 | |
1594 | res=POPs; |
ebafeae7 |
1595 | PUTBACK; |
d3acc0f7 |
1596 | POPSTACK; |
54310121 |
1597 | CATCH_SET(oldcatch); |
a0d0e21e |
1598 | |
a0d0e21e |
1599 | if (postpr) { |
1600 | int ans; |
1601 | switch (method) { |
1602 | case le_amg: |
1603 | case sle_amg: |
1604 | ans=SvIV(res)<=0; break; |
1605 | case lt_amg: |
1606 | case slt_amg: |
1607 | ans=SvIV(res)<0; break; |
1608 | case ge_amg: |
1609 | case sge_amg: |
1610 | ans=SvIV(res)>=0; break; |
1611 | case gt_amg: |
1612 | case sgt_amg: |
1613 | ans=SvIV(res)>0; break; |
1614 | case eq_amg: |
1615 | case seq_amg: |
1616 | ans=SvIV(res)==0; break; |
1617 | case ne_amg: |
1618 | case sne_amg: |
1619 | ans=SvIV(res)!=0; break; |
1620 | case inc_amg: |
1621 | case dec_amg: |
bbce6d69 |
1622 | SvSetSV(left,res); return left; |
dc437b57 |
1623 | case not_amg: |
fe7ac86a |
1624 | ans=!SvTRUE(res); break; |
a0d0e21e |
1625 | } |
54310121 |
1626 | return boolSV(ans); |
748a9306 |
1627 | } else if (method==copy_amg) { |
1628 | if (!SvROK(res)) { |
cea2e8a9 |
1629 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1630 | } |
1631 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1632 | } else { |
1633 | return res; |
1634 | } |
1635 | } |
1636 | } |
c9d5ac95 |
1637 | |
1638 | /* |
1639 | =for apidoc is_gv_magical |
1640 | |
1641 | Returns C<TRUE> if given the name of a magical GV. |
1642 | |
1643 | Currently only useful internally when determining if a GV should be |
1644 | created even in rvalue contexts. |
1645 | |
1646 | C<flags> is not used at present but available for future extension to |
1647 | allow selecting particular classes of magical variable. |
1648 | |
1649 | =cut |
1650 | */ |
1651 | bool |
1652 | Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) |
1653 | { |
1654 | if (!len) |
1655 | return FALSE; |
1656 | |
1657 | switch (*name) { |
1658 | case 'I': |
1659 | if (len == 3 && strEQ(name, "ISA")) |
1660 | goto yes; |
1661 | break; |
1662 | case 'O': |
1663 | if (len == 8 && strEQ(name, "OVERLOAD")) |
1664 | goto yes; |
1665 | break; |
1666 | case 'S': |
1667 | if (len == 3 && strEQ(name, "SIG")) |
1668 | goto yes; |
1669 | break; |
ac27b0f5 |
1670 | case '\017': /* $^O & $^OPEN */ |
1671 | if (len == 1 |
1672 | || (len == 4 && strEQ(name, "\027PEN"))) |
1673 | { |
1674 | goto yes; |
1675 | } |
1676 | break; |
c9d5ac95 |
1677 | case '\027': /* $^W & $^WARNING_BITS */ |
1678 | if (len == 1 |
1679 | || (len == 12 && strEQ(name, "\027ARNING_BITS")) |
1680 | || (len == 17 && strEQ(name, "\027IDE_SYSTEM_CALLS"))) |
1681 | { |
1682 | goto yes; |
1683 | } |
1684 | break; |
1685 | |
1686 | case '&': |
1687 | case '`': |
1688 | case '\'': |
1689 | case ':': |
1690 | case '?': |
1691 | case '!': |
1692 | case '-': |
1693 | case '#': |
1694 | case '*': |
1695 | case '[': |
1696 | case '^': |
1697 | case '~': |
1698 | case '=': |
1699 | case '%': |
1700 | case '.': |
1701 | case '(': |
1702 | case ')': |
1703 | case '<': |
1704 | case '>': |
1705 | case ',': |
1706 | case '\\': |
1707 | case '/': |
1708 | case '|': |
1709 | case '+': |
1710 | case ';': |
1711 | case ']': |
1712 | case '\001': /* $^A */ |
1713 | case '\003': /* $^C */ |
1714 | case '\004': /* $^D */ |
1715 | case '\005': /* $^E */ |
1716 | case '\006': /* $^F */ |
1717 | case '\010': /* $^H */ |
1718 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1719 | case '\014': /* $^L */ |
c9d5ac95 |
1720 | case '\020': /* $^P */ |
1721 | case '\023': /* $^S */ |
1722 | case '\024': /* $^T */ |
1723 | case '\026': /* $^V */ |
1724 | if (len == 1) |
1725 | goto yes; |
1726 | break; |
1727 | case '1': |
1728 | case '2': |
1729 | case '3': |
1730 | case '4': |
1731 | case '5': |
1732 | case '6': |
1733 | case '7': |
1734 | case '8': |
1735 | case '9': |
1736 | if (len > 1) { |
1737 | char *end = name + len; |
1738 | while (--end > name) { |
1739 | if (!isDIGIT(*end)) |
1740 | return FALSE; |
1741 | } |
1742 | } |
1743 | yes: |
1744 | return TRUE; |
1745 | default: |
1746 | break; |
1747 | } |
1748 | return FALSE; |
1749 | } |