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 | { |
e858de61 |
56 | dTHR; |
53d95988 |
57 | char smallbuf[256]; |
58 | char *tmpbuf; |
8ebc5c01 |
59 | STRLEN tmplen; |
79072805 |
60 | GV *gv; |
61 | |
1d7c1841 |
62 | if (!PL_defstash) |
63 | return Nullgv; |
64 | |
53d95988 |
65 | tmplen = strlen(name) + 2; |
66 | if (tmplen < sizeof smallbuf) |
67 | tmpbuf = smallbuf; |
68 | else |
69 | New(603, tmpbuf, tmplen + 1, char); |
70 | tmpbuf[0] = '_'; |
71 | tmpbuf[1] = '<'; |
72 | strcpy(tmpbuf + 2, name); |
3280af22 |
73 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
74 | if (!isGV(gv)) { |
3280af22 |
75 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
1d7c1841 |
76 | sv_setpv(GvSV(gv), name); |
77 | if (PERLDB_LINE) |
78 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79 | } |
53d95988 |
80 | if (tmpbuf != smallbuf) |
81 | Safefree(tmpbuf); |
79072805 |
82 | return gv; |
83 | } |
84 | |
463ee0b2 |
85 | void |
864dbfa3 |
86 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
87 | { |
0f15f207 |
88 | dTHR; |
463ee0b2 |
89 | register GP *gp; |
55d729e4 |
90 | bool doproto = SvTYPE(gv) > SVt_NULL; |
91 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
463ee0b2 |
92 | |
dc437b57 |
93 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
94 | if (SvLEN(gv)) { |
95 | if (proto) { |
96 | SvPVX(gv) = NULL; |
97 | SvLEN(gv) = 0; |
98 | SvPOK_off(gv); |
99 | } else |
100 | Safefree(SvPVX(gv)); |
101 | } |
44a8e56a |
102 | Newz(602, gp, 1, GP); |
8990e307 |
103 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
104 | GvSV(gv) = NEWSV(72,0); |
1d7c1841 |
105 | GvLINE(gv) = CopLINE(PL_curcop); |
106 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; |
005a453c |
107 | GvCVGEN(gv) = 0; |
463ee0b2 |
108 | GvEGV(gv) = gv; |
109 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); |
85aff577 |
110 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e |
111 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
112 | GvNAMELEN(gv) = len; |
23ad5bf5 |
113 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
114 | GvMULTI_on(gv); |
55d729e4 |
115 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
116 | SvIOK_off(gv); |
55d729e4 |
117 | ENTER; |
b099ddc0 |
118 | /* XXX unsafe for threads if eval_owner isn't held */ |
55d729e4 |
119 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 |
120 | GvCV(gv) = PL_compcv; |
55d729e4 |
121 | LEAVE; |
122 | |
3280af22 |
123 | PL_sub_generation++; |
55d729e4 |
124 | CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv); |
1d7c1841 |
125 | CvFILE(GvCV(gv)) = CopFILE(PL_curcop); |
3280af22 |
126 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
127 | #ifdef USE_THREADS |
128 | CvOWNER(GvCV(gv)) = 0; |
1cfa4ec7 |
129 | if (!CvMUTEXP(GvCV(gv))) { |
b0a484d2 |
130 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
1cfa4ec7 |
131 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
132 | } |
55d729e4 |
133 | #endif /* USE_THREADS */ |
134 | if (proto) { |
135 | sv_setpv((SV*)GvCV(gv), proto); |
136 | Safefree(proto); |
137 | } |
138 | } |
463ee0b2 |
139 | } |
140 | |
76e3520e |
141 | STATIC void |
cea2e8a9 |
142 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
143 | { |
144 | switch (sv_type) { |
145 | case SVt_PVIO: |
146 | (void)GvIOn(gv); |
147 | break; |
148 | case SVt_PVAV: |
149 | (void)GvAVn(gv); |
150 | break; |
151 | case SVt_PVHV: |
152 | (void)GvHVn(gv); |
153 | break; |
154 | } |
155 | } |
156 | |
954c1994 |
157 | /* |
158 | =for apidoc gv_fetchmeth |
159 | |
160 | Returns the glob with the given C<name> and a defined subroutine or |
161 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
162 | accessible via @ISA and @UNIVERSAL. |
163 | |
164 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
165 | side-effect creates a glob with the given C<name> in the given C<stash> |
166 | which in the case of success contains an alias for the subroutine, and sets |
167 | up caching info for this glob. Similarly for all the searched stashes. |
168 | |
169 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
170 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
171 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
172 | the GV directly; instead, you should use the method's CV, which can be |
173 | obtained from the GV with the C<GvCV> macro. |
174 | |
175 | =cut |
176 | */ |
177 | |
79072805 |
178 | GV * |
864dbfa3 |
179 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
180 | { |
181 | AV* av; |
463ee0b2 |
182 | GV* topgv; |
79072805 |
183 | GV* gv; |
463ee0b2 |
184 | GV** gvp; |
748a9306 |
185 | CV* cv; |
a0d0e21e |
186 | |
187 | if (!stash) |
188 | return 0; |
44a8e56a |
189 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
190 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
3e0ccd42 |
191 | name, HvNAME(stash)); |
463ee0b2 |
192 | |
cea2e8a9 |
193 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
194 | |
195 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
196 | if (!gvp) |
197 | topgv = Nullgv; |
198 | else { |
199 | topgv = *gvp; |
200 | if (SvTYPE(topgv) != SVt_PVGV) |
201 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
202 | if ((cv = GvCV(topgv))) { |
44a8e56a |
203 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
204 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
205 | return topgv; |
44a8e56a |
206 | /* Stale cached entry: junk it */ |
207 | SvREFCNT_dec(cv); |
208 | GvCV(topgv) = cv = Nullcv; |
209 | GvCVGEN(topgv) = 0; |
748a9306 |
210 | } |
3280af22 |
211 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
212 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
213 | } |
79072805 |
214 | |
9607fc9c |
215 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
216 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
217 | |
fb73857a |
218 | /* create and re-create @.*::SUPER::ISA on demand */ |
219 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
220 | char* packname = HvNAME(stash); |
221 | STRLEN packlen = strlen(packname); |
222 | |
223 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
224 | HV* basestash; |
225 | |
226 | packlen -= 7; |
227 | basestash = gv_stashpvn(packname, packlen, TRUE); |
228 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
229 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
e858de61 |
230 | dTHR; /* just for SvREFCNT_dec */ |
9607fc9c |
231 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
232 | if (!gvp || !(gv = *gvp)) |
cea2e8a9 |
233 | Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); |
9607fc9c |
234 | if (SvTYPE(gv) != SVt_PVGV) |
235 | gv_init(gv, stash, "ISA", 3, TRUE); |
236 | SvREFCNT_dec(GvAV(gv)); |
237 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
238 | } |
239 | } |
240 | } |
241 | |
242 | if (av) { |
79072805 |
243 | SV** svp = AvARRAY(av); |
93965878 |
244 | /* NOTE: No support for tied ISA */ |
245 | I32 items = AvFILLp(av) + 1; |
79072805 |
246 | while (items--) { |
79072805 |
247 | SV* sv = *svp++; |
a0d0e21e |
248 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
249 | if (!basestash) { |
d008e5eb |
250 | dTHR; /* just for ckWARN */ |
599cee73 |
251 | if (ckWARN(WARN_MISC)) |
cea2e8a9 |
252 | Perl_warner(aTHX_ WARN_MISC, "Can't locate package %s for @%s::ISA", |
463ee0b2 |
253 | SvPVX(sv), HvNAME(stash)); |
79072805 |
254 | continue; |
255 | } |
44a8e56a |
256 | gv = gv_fetchmeth(basestash, name, len, |
257 | (level >= 0) ? level + 1 : level - 1); |
258 | if (gv) |
259 | goto gotcha; |
79072805 |
260 | } |
261 | } |
a0d0e21e |
262 | |
9607fc9c |
263 | /* if at top level, try UNIVERSAL */ |
264 | |
44a8e56a |
265 | if (level == 0 || level == -1) { |
9607fc9c |
266 | HV* lastchance; |
267 | |
155aba94 |
268 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
269 | if ((gv = gv_fetchmeth(lastchance, name, len, |
270 | (level >= 0) ? level + 1 : level - 1))) |
271 | { |
44a8e56a |
272 | gotcha: |
dc848c6f |
273 | /* |
274 | * Cache method in topgv if: |
275 | * 1. topgv has no synonyms (else inheritance crosses wires) |
276 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
277 | */ |
278 | if (topgv && |
279 | GvREFCNT(topgv) == 1 && |
280 | (cv = GvCV(gv)) && |
281 | (CvROOT(cv) || CvXSUB(cv))) |
282 | { |
155aba94 |
283 | if ((cv = GvCV(topgv))) |
44a8e56a |
284 | SvREFCNT_dec(cv); |
285 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
286 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
287 | } |
a0d0e21e |
288 | return gv; |
289 | } |
005a453c |
290 | else if (topgv && GvREFCNT(topgv) == 1) { |
291 | /* cache the fact that the method is not defined */ |
3280af22 |
292 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
293 | } |
a0d0e21e |
294 | } |
295 | } |
296 | |
79072805 |
297 | return 0; |
298 | } |
299 | |
954c1994 |
300 | /* |
301 | =for apidoc gv_fetchmethod |
302 | |
6d0f518e |
303 | See L<gv_fetchmethod_autoload>. |
954c1994 |
304 | |
305 | =cut |
306 | */ |
307 | |
79072805 |
308 | GV * |
864dbfa3 |
309 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
463ee0b2 |
310 | { |
dc848c6f |
311 | return gv_fetchmethod_autoload(stash, name, TRUE); |
312 | } |
313 | |
954c1994 |
314 | /* |
315 | =for apidoc gv_fetchmethod_autoload |
316 | |
317 | Returns the glob which contains the subroutine to call to invoke the method |
318 | on the C<stash>. In fact in the presence of autoloading this may be the |
319 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
320 | already setup. |
321 | |
322 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
323 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
324 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
325 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
326 | with a non-zero C<autoload> parameter. |
327 | |
328 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
329 | that if you want to keep the returned glob for a long time, you need to |
330 | check for it being "AUTOLOAD", since at the later time the call may load a |
331 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
332 | created via a side effect to do this. |
333 | |
334 | These functions have the same side-effects and as C<gv_fetchmeth> with |
335 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
336 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
4929bf7b |
337 | C<call_sv> apply equally to these functions. |
954c1994 |
338 | |
339 | =cut |
340 | */ |
341 | |
dc848c6f |
342 | GV * |
864dbfa3 |
343 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
344 | { |
0f15f207 |
345 | dTHR; |
08105a92 |
346 | register const char *nend; |
347 | const char *nsplit = 0; |
a0d0e21e |
348 | GV* gv; |
463ee0b2 |
349 | |
350 | for (nend = name; *nend; nend++) { |
9607fc9c |
351 | if (*nend == '\'') |
a0d0e21e |
352 | nsplit = nend; |
9607fc9c |
353 | else if (*nend == ':' && *(nend + 1) == ':') |
354 | nsplit = ++nend; |
a0d0e21e |
355 | } |
356 | if (nsplit) { |
08105a92 |
357 | const char *origname = name; |
a0d0e21e |
358 | name = nsplit + 1; |
a0d0e21e |
359 | if (*nsplit == ':') |
360 | --nsplit; |
9607fc9c |
361 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
362 | /* ->SUPER::method should really be looked up in original stash */ |
cea2e8a9 |
363 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
364 | CopSTASHPV(PL_curcop))); |
9607fc9c |
365 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
366 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
9607fc9c |
367 | origname, HvNAME(stash), name) ); |
4633a7c4 |
368 | } |
9607fc9c |
369 | else |
370 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
4633a7c4 |
371 | } |
372 | |
9607fc9c |
373 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
374 | if (!gv) { |
702887b4 |
375 | if (strEQ(name,"import")) |
3280af22 |
376 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
377 | else if (autoload) |
54310121 |
378 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
379 | } |
dc848c6f |
380 | else if (autoload) { |
381 | CV* cv = GvCV(gv); |
09280a33 |
382 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
383 | GV* stubgv; |
384 | GV* autogv; |
385 | |
386 | if (CvANON(cv)) |
387 | stubgv = gv; |
388 | else { |
389 | stubgv = CvGV(cv); |
390 | if (GvCV(stubgv) != cv) /* orphaned import */ |
391 | stubgv = gv; |
392 | } |
393 | autogv = gv_autoload4(GvSTASH(stubgv), |
394 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
395 | if (autogv) |
396 | gv = autogv; |
397 | } |
398 | } |
44a8e56a |
399 | |
400 | return gv; |
401 | } |
402 | |
403 | GV* |
864dbfa3 |
404 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
405 | { |
d008e5eb |
406 | dTHR; |
44a8e56a |
407 | static char autoload[] = "AUTOLOAD"; |
408 | static STRLEN autolen = 8; |
409 | GV* gv; |
410 | CV* cv; |
411 | HV* varstash; |
412 | GV* vargv; |
413 | SV* varsv; |
414 | |
415 | if (len == autolen && strnEQ(name, autoload, autolen)) |
416 | return Nullgv; |
dc848c6f |
417 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
418 | return Nullgv; |
419 | cv = GvCV(gv); |
420 | |
421 | /* |
422 | * Inheriting AUTOLOAD for non-methods works ... for now. |
423 | */ |
599cee73 |
424 | if (ckWARN(WARN_DEPRECATED) && !method && |
425 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
cea2e8a9 |
426 | Perl_warner(aTHX_ WARN_DEPRECATED, |
dc848c6f |
427 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
428 | HvNAME(stash), (int)len, name); |
44a8e56a |
429 | |
430 | /* |
431 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
432 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
433 | * use that, but for lack of anything better we will use the sub's |
434 | * original package to look up $AUTOLOAD. |
435 | */ |
436 | varstash = GvSTASH(CvGV(cv)); |
437 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
b37a7757 |
438 | ENTER; |
b8b4c9f3 |
439 | |
440 | #ifdef USE_THREADS |
b37a7757 |
441 | Perl_lock(aTHX_ (SV *)varstash); |
b8b4c9f3 |
442 | #endif |
44a8e56a |
443 | if (!isGV(vargv)) |
444 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
b37a7757 |
445 | LEAVE; |
44a8e56a |
446 | varsv = GvSV(vargv); |
b8b4c9f3 |
447 | #ifdef USE_THREADS |
b37a7757 |
448 | Perl_lock(aTHX_ varsv); |
b8b4c9f3 |
449 | #endif |
44a8e56a |
450 | sv_setpv(varsv, HvNAME(stash)); |
451 | sv_catpvn(varsv, "::", 2); |
452 | sv_catpvn(varsv, name, len); |
453 | SvTAINTED_off(varsv); |
a0d0e21e |
454 | return gv; |
455 | } |
456 | |
954c1994 |
457 | /* |
458 | =for apidoc gv_stashpv |
459 | |
386d01d6 |
460 | Returns a pointer to the stash for a specified package. C<name> should |
461 | be a valid UTF-8 string. If C<create> is set then the package will be |
462 | created if it does not already exist. If C<create> is not set and the |
463 | package does not exist then NULL is returned. |
954c1994 |
464 | |
465 | =cut |
466 | */ |
467 | |
a0d0e21e |
468 | HV* |
864dbfa3 |
469 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
470 | { |
dc437b57 |
471 | return gv_stashpvn(name, strlen(name), create); |
472 | } |
473 | |
474 | HV* |
864dbfa3 |
475 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
476 | { |
46fc3d4c |
477 | char smallbuf[256]; |
478 | char *tmpbuf; |
a0d0e21e |
479 | HV *stash; |
480 | GV *tmpgv; |
dc437b57 |
481 | |
46fc3d4c |
482 | if (namelen + 3 < sizeof smallbuf) |
483 | tmpbuf = smallbuf; |
484 | else |
485 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
486 | Copy(name,tmpbuf,namelen,char); |
487 | tmpbuf[namelen++] = ':'; |
488 | tmpbuf[namelen++] = ':'; |
489 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
490 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
491 | if (tmpbuf != smallbuf) |
492 | Safefree(tmpbuf); |
a0d0e21e |
493 | if (!tmpgv) |
494 | return 0; |
495 | if (!GvHV(tmpgv)) |
496 | GvHV(tmpgv) = newHV(); |
497 | stash = GvHV(tmpgv); |
498 | if (!HvNAME(stash)) |
499 | HvNAME(stash) = savepv(name); |
500 | return stash; |
463ee0b2 |
501 | } |
502 | |
954c1994 |
503 | /* |
504 | =for apidoc gv_stashsv |
505 | |
386d01d6 |
506 | Returns a pointer to the stash for a specified package, which must be a |
507 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
508 | |
509 | =cut |
510 | */ |
511 | |
a0d0e21e |
512 | HV* |
864dbfa3 |
513 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
514 | { |
dc437b57 |
515 | register char *ptr; |
516 | STRLEN len; |
517 | ptr = SvPV(sv,len); |
518 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
519 | } |
520 | |
521 | |
463ee0b2 |
522 | GV * |
864dbfa3 |
523 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
79072805 |
524 | { |
11343788 |
525 | dTHR; |
08105a92 |
526 | register const char *name = nambeg; |
463ee0b2 |
527 | register GV *gv = 0; |
79072805 |
528 | GV**gvp; |
79072805 |
529 | I32 len; |
08105a92 |
530 | register const char *namend; |
463ee0b2 |
531 | HV *stash = 0; |
79072805 |
532 | |
c07a80fd |
533 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
534 | name++; |
535 | |
79072805 |
536 | for (namend = name; *namend; namend++) { |
1d7c1841 |
537 | if ((*namend == ':' && namend[1] == ':') |
538 | || (*namend == '\'' && namend[1])) |
463ee0b2 |
539 | { |
463ee0b2 |
540 | if (!stash) |
3280af22 |
541 | stash = PL_defstash; |
dc437b57 |
542 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
543 | return Nullgv; |
463ee0b2 |
544 | |
85e6fe83 |
545 | len = namend - name; |
546 | if (len > 0) { |
3c78fafa |
547 | char smallbuf[256]; |
62b57502 |
548 | char *tmpbuf; |
62b57502 |
549 | |
3c78fafa |
550 | if (len + 3 < sizeof smallbuf) |
551 | tmpbuf = smallbuf; |
62b57502 |
552 | else |
553 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
554 | Copy(name, tmpbuf, len, char); |
555 | tmpbuf[len++] = ':'; |
556 | tmpbuf[len++] = ':'; |
557 | tmpbuf[len] = '\0'; |
463ee0b2 |
558 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
559 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
560 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
561 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
562 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
563 | else |
564 | GvMULTI_on(gv); |
565 | } |
3c78fafa |
566 | if (tmpbuf != smallbuf) |
62b57502 |
567 | Safefree(tmpbuf); |
3280af22 |
568 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
569 | return Nullgv; |
85e6fe83 |
570 | |
463ee0b2 |
571 | if (!(stash = GvHV(gv))) |
572 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
573 | |
463ee0b2 |
574 | if (!HvNAME(stash)) |
a0d0e21e |
575 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
576 | } |
577 | |
578 | if (*namend == ':') |
579 | namend++; |
580 | namend++; |
581 | name = namend; |
582 | if (!*name) |
3280af22 |
583 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
584 | } |
79072805 |
585 | } |
a0d0e21e |
586 | len = namend - name; |
587 | if (!len) |
588 | len = 1; |
463ee0b2 |
589 | |
590 | /* No stash in name, so see how we can default */ |
591 | |
592 | if (!stash) { |
7e2040f0 |
593 | if (isIDFIRST_lazy(name)) { |
9607fc9c |
594 | bool global = FALSE; |
595 | |
463ee0b2 |
596 | if (isUPPER(*name)) { |
9d116dd7 |
597 | if (*name == 'S' && ( |
598 | strEQ(name, "SIG") || |
599 | strEQ(name, "STDIN") || |
600 | strEQ(name, "STDOUT") || |
601 | strEQ(name, "STDERR"))) |
602 | global = TRUE; |
603 | else if (*name == 'I' && strEQ(name, "INC")) |
604 | global = TRUE; |
605 | else if (*name == 'E' && strEQ(name, "ENV")) |
606 | global = TRUE; |
463ee0b2 |
607 | else if (*name == 'A' && ( |
608 | strEQ(name, "ARGV") || |
9d116dd7 |
609 | strEQ(name, "ARGVOUT"))) |
463ee0b2 |
610 | global = TRUE; |
611 | } |
612 | else if (*name == '_' && !name[1]) |
613 | global = TRUE; |
9607fc9c |
614 | |
463ee0b2 |
615 | if (global) |
3280af22 |
616 | stash = PL_defstash; |
617 | else if ((COP*)PL_curcop == &PL_compiling) { |
618 | stash = PL_curstash; |
619 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
620 | sv_type != SVt_PVCV && |
621 | sv_type != SVt_PVGV && |
4633a7c4 |
622 | sv_type != SVt_PVFM && |
c07a80fd |
623 | sv_type != SVt_PVIO && |
377b8fbc |
624 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
625 | { |
4633a7c4 |
626 | gvp = (GV**)hv_fetch(stash,name,len,0); |
627 | if (!gvp || |
3280af22 |
628 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
629 | SvTYPE(*gvp) != SVt_PVGV) |
630 | { |
4633a7c4 |
631 | stash = 0; |
a5f75d66 |
632 | } |
155aba94 |
633 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
634 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
635 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
636 | { |
cea2e8a9 |
637 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
638 | sv_type == SVt_PVAV ? '@' : |
639 | sv_type == SVt_PVHV ? '%' : '$', |
640 | name); |
8ebc5c01 |
641 | if (GvCVu(*gvp)) |
cc507455 |
642 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
643 | stash = 0; |
4633a7c4 |
644 | } |
a0d0e21e |
645 | } |
85e6fe83 |
646 | } |
463ee0b2 |
647 | else |
1d7c1841 |
648 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
649 | } |
650 | else |
3280af22 |
651 | stash = PL_defstash; |
463ee0b2 |
652 | } |
653 | |
654 | /* By this point we should have a stash and a name */ |
655 | |
a0d0e21e |
656 | if (!stash) { |
5a844595 |
657 | if (add) { |
658 | qerror(Perl_mess(aTHX_ |
659 | "Global symbol \"%s%s\" requires explicit package name", |
660 | (sv_type == SVt_PV ? "$" |
661 | : sv_type == SVt_PVAV ? "@" |
662 | : sv_type == SVt_PVHV ? "%" |
663 | : ""), name)); |
f180df80 |
664 | stash = PL_nullstash; |
a0d0e21e |
665 | } |
f180df80 |
666 | else |
667 | return Nullgv; |
a0d0e21e |
668 | } |
669 | |
670 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
671 | return Nullgv; |
672 | |
79072805 |
673 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
674 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
675 | return Nullgv; |
676 | gv = *gvp; |
677 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
678 | if (add) { |
a5f75d66 |
679 | GvMULTI_on(gv); |
a0d0e21e |
680 | gv_init_sv(gv, sv_type); |
681 | } |
79072805 |
682 | return gv; |
55d729e4 |
683 | } else if (add & GV_NOINIT) { |
684 | return gv; |
79072805 |
685 | } |
93a17b20 |
686 | |
687 | /* Adding a new symbol */ |
688 | |
0453d815 |
689 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
690 | Perl_warner(aTHX_ WARN_INTERNAL, "Had to create %s unexpectedly", nambeg); |
55d729e4 |
691 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
692 | gv_init_sv(gv, sv_type); |
93a17b20 |
693 | |
0453d815 |
694 | if (isLEXWARN_on && isALPHA(name[0]) && ! ckWARN(WARN_ONCE)) |
695 | GvMULTI_on(gv) ; |
696 | |
93a17b20 |
697 | /* set up magic where warranted */ |
698 | switch (*name) { |
a0d0e21e |
699 | case 'A': |
700 | if (strEQ(name, "ARGV")) { |
701 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
702 | } |
703 | break; |
a0d0e21e |
704 | case 'E': |
705 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
706 | GvMULTI_on(gv); |
a0d0e21e |
707 | break; |
463ee0b2 |
708 | case 'I': |
709 | if (strEQ(name, "ISA")) { |
710 | AV* av = GvAVn(gv); |
a5f75d66 |
711 | GvMULTI_on(gv); |
a0d0e21e |
712 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
93965878 |
713 | /* NOTE: No support for tied ISA */ |
55d729e4 |
714 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
715 | && AvFILLp(av) == -1) |
85e6fe83 |
716 | { |
a0d0e21e |
717 | char *pname; |
79cb57f6 |
718 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
dc437b57 |
719 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
720 | av_push(av, newSVpvn(pname = "DB_File",7)); |
dc437b57 |
721 | gv_stashpvn(pname, 7, TRUE); |
79cb57f6 |
722 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
dc437b57 |
723 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
724 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
dc437b57 |
725 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
726 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
dc437b57 |
727 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
728 | } |
463ee0b2 |
729 | } |
730 | break; |
a0d0e21e |
731 | case 'O': |
732 | if (strEQ(name, "OVERLOAD")) { |
733 | HV* hv = GvHVn(gv); |
a5f75d66 |
734 | GvMULTI_on(gv); |
ea0efc06 |
735 | hv_magic(hv, gv, 'A'); |
a0d0e21e |
736 | } |
737 | break; |
93a17b20 |
738 | case 'S': |
739 | if (strEQ(name, "SIG")) { |
740 | HV *hv; |
dc437b57 |
741 | I32 i; |
1d7c1841 |
742 | if (!PL_psig_ptr) { |
743 | int sig_num[] = { SIG_NUM }; |
744 | New(73, PL_psig_ptr, sizeof(sig_num)/sizeof(*sig_num), SV*); |
745 | New(73, PL_psig_name, sizeof(sig_num)/sizeof(*sig_num), SV*); |
746 | } |
747 | GvMULTI_on(gv); |
748 | hv = GvHVn(gv); |
749 | hv_magic(hv, gv, 'S'); |
750 | for (i = 1; PL_sig_name[i]; i++) { |
dc437b57 |
751 | SV ** init; |
1d7c1841 |
752 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
753 | if (init) |
754 | sv_setsv(*init, &PL_sv_undef); |
22c35a8c |
755 | PL_psig_ptr[i] = 0; |
756 | PL_psig_name[i] = 0; |
dc437b57 |
757 | } |
93a17b20 |
758 | } |
759 | break; |
09bef843 |
760 | case 'V': |
761 | if (strEQ(name, "VERSION")) |
762 | GvMULTI_on(gv); |
763 | break; |
93a17b20 |
764 | |
765 | case '&': |
463ee0b2 |
766 | if (len > 1) |
767 | break; |
3280af22 |
768 | PL_sawampersand = TRUE; |
a0d0e21e |
769 | goto ro_magicalize; |
93a17b20 |
770 | |
771 | case '`': |
463ee0b2 |
772 | if (len > 1) |
773 | break; |
3280af22 |
774 | PL_sawampersand = TRUE; |
a0d0e21e |
775 | goto ro_magicalize; |
93a17b20 |
776 | |
777 | case '\'': |
463ee0b2 |
778 | if (len > 1) |
779 | break; |
3280af22 |
780 | PL_sawampersand = TRUE; |
a0d0e21e |
781 | goto ro_magicalize; |
93a17b20 |
782 | |
783 | case ':': |
463ee0b2 |
784 | if (len > 1) |
785 | break; |
3280af22 |
786 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 |
787 | goto magicalize; |
788 | |
ff0cee69 |
789 | case '?': |
790 | if (len > 1) |
791 | break; |
792 | #ifdef COMPLEX_STATUS |
07f14f54 |
793 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
ff0cee69 |
794 | #endif |
795 | goto magicalize; |
796 | |
067391ea |
797 | case '!': |
4318d5a0 |
798 | if (len > 1) |
067391ea |
799 | break; |
3280af22 |
800 | if (sv_type > SVt_PV && PL_curcop != &PL_compiling) { |
067391ea |
801 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
265f5c4a |
802 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
067391ea |
803 | dSP; |
804 | PUTBACK; |
cea2e8a9 |
805 | require_pv("Errno.pm"); |
067391ea |
806 | SPAGAIN; |
807 | stash = gv_stashpvn("Errno",5,FALSE); |
808 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
cea2e8a9 |
809 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
067391ea |
810 | } |
811 | } |
812 | goto magicalize; |
6cef1e77 |
813 | case '-': |
814 | if (len > 1) |
815 | break; |
816 | else { |
817 | AV* av = GvAVn(gv); |
818 | sv_magic((SV*)av, Nullsv, 'D', Nullch, 0); |
819 | } |
820 | goto magicalize; |
93a17b20 |
821 | case '#': |
a0d0e21e |
822 | case '*': |
599cee73 |
823 | if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV) |
cea2e8a9 |
824 | Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name); |
a0d0e21e |
825 | /* FALL THROUGH */ |
826 | case '[': |
93a17b20 |
827 | case '^': |
828 | case '~': |
829 | case '=': |
93a17b20 |
830 | case '%': |
831 | case '.': |
93a17b20 |
832 | case '(': |
833 | case ')': |
834 | case '<': |
835 | case '>': |
836 | case ',': |
837 | case '\\': |
838 | case '/': |
93a17b20 |
839 | case '|': |
16070b82 |
840 | case '\001': /* $^A */ |
841 | case '\003': /* $^C */ |
842 | case '\004': /* $^D */ |
843 | case '\005': /* $^E */ |
844 | case '\006': /* $^F */ |
845 | case '\010': /* $^H */ |
846 | case '\011': /* $^I, NOT \t in EBCDIC */ |
847 | case '\017': /* $^O */ |
848 | case '\020': /* $^P */ |
849 | case '\024': /* $^T */ |
463ee0b2 |
850 | if (len > 1) |
851 | break; |
852 | goto magicalize; |
16070b82 |
853 | case '\023': /* $^S */ |
6cef1e77 |
854 | if (len > 1) |
855 | break; |
856 | goto ro_magicalize; |
6a818117 |
857 | case '\027': /* $^W & $^WARNING_BITS */ |
a50e31ad |
858 | if (len > 1 && strNE(name, "\027ARNING_BITS") |
859 | && strNE(name, "\027IDE_SYSTEM_CALLS")) |
4438c4b7 |
860 | break; |
861 | goto magicalize; |
463ee0b2 |
862 | |
a0d0e21e |
863 | case '+': |
6cef1e77 |
864 | if (len > 1) |
865 | break; |
866 | else { |
867 | AV* av = GvAVn(gv); |
868 | sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0); |
869 | } |
870 | /* FALL THROUGH */ |
463ee0b2 |
871 | case '1': |
872 | case '2': |
873 | case '3': |
874 | case '4': |
875 | case '5': |
876 | case '6': |
877 | case '7': |
878 | case '8': |
879 | case '9': |
a0d0e21e |
880 | ro_magicalize: |
881 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
882 | magicalize: |
463ee0b2 |
883 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
884 | break; |
885 | |
16070b82 |
886 | case '\014': /* $^L */ |
463ee0b2 |
887 | if (len > 1) |
888 | break; |
93a17b20 |
889 | sv_setpv(GvSV(gv),"\f"); |
3280af22 |
890 | PL_formfeed = GvSV(gv); |
93a17b20 |
891 | break; |
892 | case ';': |
463ee0b2 |
893 | if (len > 1) |
894 | break; |
93a17b20 |
895 | sv_setpv(GvSV(gv),"\034"); |
896 | break; |
463ee0b2 |
897 | case ']': |
898 | if (len == 1) { |
f86702cc |
899 | SV *sv = GvSV(gv); |
5089c844 |
900 | (void)SvUPGRADE(sv, SVt_PVNV); |
901 | SvNVX(sv) = SvNVX(PL_patchlevel); |
902 | SvNOK_on(sv); |
903 | (void)SvPV_nolen(sv); |
904 | SvREADONLY_on(sv); |
93a17b20 |
905 | } |
906 | break; |
16070b82 |
907 | case '\026': /* $^V */ |
908 | if (len == 1) { |
909 | SV *sv = GvSV(gv); |
910 | GvSV(gv) = SvREFCNT_inc(PL_patchlevel); |
911 | SvREFCNT_dec(sv); |
912 | } |
913 | break; |
79072805 |
914 | } |
93a17b20 |
915 | return gv; |
79072805 |
916 | } |
917 | |
918 | void |
864dbfa3 |
919 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
920 | { |
921 | HV *hv = GvSTASH(gv); |
f967eb5f |
922 | if (!hv) { |
155aba94 |
923 | (void)SvOK_off(sv); |
79072805 |
924 | return; |
f967eb5f |
925 | } |
926 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
927 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
928 | sv_catpvn(sv,"::", 2); |
79072805 |
929 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
930 | } |
931 | |
932 | void |
864dbfa3 |
933 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
934 | { |
f967eb5f |
935 | GV *egv = GvEGV(gv); |
748a9306 |
936 | if (!egv) |
937 | egv = gv; |
f6aff53a |
938 | gv_fullname3(sv, egv, prefix); |
939 | } |
940 | |
941 | /* XXX compatibility with versions <= 5.003. */ |
942 | void |
864dbfa3 |
943 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
944 | { |
945 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
946 | } |
947 | |
948 | /* XXX compatibility with versions <= 5.003. */ |
949 | void |
864dbfa3 |
950 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
951 | { |
952 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
953 | } |
954 | |
955 | IO * |
864dbfa3 |
956 | Perl_newIO(pTHX) |
79072805 |
957 | { |
11343788 |
958 | dTHR; |
79072805 |
959 | IO *io; |
8990e307 |
960 | GV *iogv; |
961 | |
962 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
963 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
964 | SvREFCNT(io) = 1; |
965 | SvOBJECT_on(io); |
c9de509e |
966 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d |
967 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
968 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
c9de509e |
969 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
970 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
971 | return io; |
972 | } |
973 | |
974 | void |
864dbfa3 |
975 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
976 | { |
11343788 |
977 | dTHR; |
79072805 |
978 | register HE *entry; |
979 | register I32 i; |
980 | register GV *gv; |
463ee0b2 |
981 | HV *hv; |
982 | |
8990e307 |
983 | if (!HvARRAY(stash)) |
984 | return; |
a0d0e21e |
985 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
986 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
987 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
988 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
989 | { |
19b6c847 |
990 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
991 | gv_check(hv); /* nested package */ |
992 | } |
dc437b57 |
993 | else if (isALPHA(*HeKEY(entry))) { |
1d7c1841 |
994 | char *file; |
dc437b57 |
995 | gv = (GV*)HeVAL(entry); |
55d729e4 |
996 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
997 | continue; |
1d7c1841 |
998 | file = GvFILE(gv); |
999 | /* performance hack: if filename is absolute and it's a standard |
1000 | * module, don't bother warning */ |
1001 | if (file |
1002 | && PERL_FILE_IS_ABSOLUTE(file) |
1003 | && (instr(file, "/lib/") || instr(file, ".pm"))) |
1004 | { |
8990e307 |
1005 | continue; |
1d7c1841 |
1006 | } |
1007 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1008 | #ifdef USE_ITHREADS |
1009 | CopFILE(PL_curcop) = file; /* set for warning */ |
1010 | #else |
1011 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1012 | #endif |
cea2e8a9 |
1013 | Perl_warner(aTHX_ WARN_ONCE, |
599cee73 |
1014 | "Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
1015 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
1016 | } |
79072805 |
1017 | } |
1018 | } |
1019 | } |
1020 | |
1021 | GV * |
864dbfa3 |
1022 | Perl_newGVgen(pTHX_ char *pack) |
79072805 |
1023 | { |
cea2e8a9 |
1024 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1025 | TRUE, SVt_PVGV); |
79072805 |
1026 | } |
1027 | |
1028 | /* hopefully this is only called on local symbol table entries */ |
1029 | |
1030 | GP* |
864dbfa3 |
1031 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1032 | { |
1d7c1841 |
1033 | if (!gp) |
1034 | return (GP*)NULL; |
79072805 |
1035 | gp->gp_refcnt++; |
44a8e56a |
1036 | if (gp->gp_cv) { |
1037 | if (gp->gp_cvgen) { |
1038 | /* multi-named GPs cannot be used for method cache */ |
1039 | SvREFCNT_dec(gp->gp_cv); |
1040 | gp->gp_cv = Nullcv; |
1041 | gp->gp_cvgen = 0; |
1042 | } |
1043 | else { |
1044 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1045 | PL_sub_generation++; |
44a8e56a |
1046 | } |
1047 | } |
79072805 |
1048 | return gp; |
79072805 |
1049 | } |
1050 | |
1051 | void |
864dbfa3 |
1052 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1053 | { |
f248d071 |
1054 | dTHR; |
79072805 |
1055 | GP* gp; |
1056 | |
1057 | if (!gv || !(gp = GvGP(gv))) |
1058 | return; |
f248d071 |
1059 | if (gp->gp_refcnt == 0) { |
1060 | if (ckWARN_d(WARN_INTERNAL)) |
1061 | Perl_warner(aTHX_ WARN_INTERNAL, |
1062 | "Attempt to free unreferenced glob pointers"); |
79072805 |
1063 | return; |
1064 | } |
44a8e56a |
1065 | if (gp->gp_cv) { |
1066 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1067 | PL_sub_generation++; |
44a8e56a |
1068 | } |
748a9306 |
1069 | if (--gp->gp_refcnt > 0) { |
1070 | if (gp->gp_egv == gv) |
1071 | gp->gp_egv = 0; |
79072805 |
1072 | return; |
748a9306 |
1073 | } |
79072805 |
1074 | |
8990e307 |
1075 | SvREFCNT_dec(gp->gp_sv); |
1076 | SvREFCNT_dec(gp->gp_av); |
1077 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
1078 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
1079 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
1080 | SvREFCNT_dec(gp->gp_form); |
1081 | |
79072805 |
1082 | Safefree(gp); |
1083 | GvGP(gv) = 0; |
1084 | } |
1085 | |
1086 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
1087 | #define MICROPORT |
1088 | #endif |
1089 | |
1090 | #ifdef MICROPORT /* Microport 2.4 hack */ |
1091 | AV *GvAVn(gv) |
1092 | register GV *gv; |
1093 | { |
1094 | if (GvGP(gv)->gp_av) |
1095 | return GvGP(gv)->gp_av; |
1096 | else |
1097 | return GvGP(gv_AVadd(gv))->gp_av; |
1098 | } |
1099 | |
1100 | HV *GvHVn(gv) |
1101 | register GV *gv; |
1102 | { |
1103 | if (GvGP(gv)->gp_hv) |
1104 | return GvGP(gv)->gp_hv; |
1105 | else |
1106 | return GvGP(gv_HVadd(gv))->gp_hv; |
1107 | } |
1108 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
1109 | |
a0d0e21e |
1110 | /* Updates and caches the CV's */ |
1111 | |
1112 | bool |
864dbfa3 |
1113 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1114 | { |
155aba94 |
1115 | dTHR; |
a0d0e21e |
1116 | GV* gv; |
1117 | CV* cv; |
1118 | MAGIC* mg=mg_find((SV*)stash,'c'); |
8ac85365 |
1119 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1120 | AMT amt; |
2d8e6c8d |
1121 | STRLEN n_a; |
155aba94 |
1122 | #ifdef OVERLOAD_VIA_HASH |
1123 | GV** gvp; |
1124 | HV* hv; |
1125 | #endif |
a0d0e21e |
1126 | |
3280af22 |
1127 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1128 | && amtp->was_ok_sub == PL_sub_generation) |
a6006777 |
1129 | return AMT_AMAGIC(amtp); |
1130 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
1131 | int i; |
a6006777 |
1132 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
1133 | if (amtp->table[i]) { |
1134 | SvREFCNT_dec(amtp->table[i]); |
1135 | } |
1136 | } |
1137 | } |
a0d0e21e |
1138 | sv_unmagic((SV*)stash, 'c'); |
1139 | |
cea2e8a9 |
1140 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
a0d0e21e |
1141 | |
3280af22 |
1142 | amt.was_ok_am = PL_amagic_generation; |
1143 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1144 | amt.fallback = AMGfallNO; |
1145 | amt.flags = 0; |
1146 | |
1147 | #ifdef OVERLOAD_VIA_HASH |
1148 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
3280af22 |
1149 | if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) { |
a0d0e21e |
1150 | int filled=0; |
1151 | int i; |
1152 | char *cp; |
a0d0e21e |
1153 | SV* sv; |
1154 | SV** svp; |
a0d0e21e |
1155 | |
22c35a8c |
1156 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a0d0e21e |
1157 | |
22c35a8c |
1158 | if (( cp = (char *)PL_AMG_names[0] ) && |
a6006777 |
1159 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
1160 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1161 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1162 | } |
a6006777 |
1163 | for (i = 1; i < NofAMmeth; i++) { |
1164 | cv = 0; |
22c35a8c |
1165 | cp = (char *)PL_AMG_names[i]; |
a6006777 |
1166 | |
1167 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
3280af22 |
1168 | if (svp && ((sv = *svp) != &PL_sv_undef)) { |
a0d0e21e |
1169 | switch (SvTYPE(sv)) { |
1170 | default: |
1171 | if (!SvROK(sv)) { |
1172 | if (!SvOK(sv)) break; |
2d8e6c8d |
1173 | gv = gv_fetchmethod(stash, SvPV(sv, n_a)); |
a0d0e21e |
1174 | if (gv) cv = GvCV(gv); |
1175 | break; |
1176 | } |
1177 | cv = (CV*)SvRV(sv); |
1178 | if (SvTYPE(cv) == SVt_PVCV) |
1179 | break; |
1180 | /* FALL THROUGH */ |
1181 | case SVt_PVHV: |
1182 | case SVt_PVAV: |
cea2e8a9 |
1183 | Perl_croak(aTHX_ "Not a subroutine reference in overload table"); |
a0d0e21e |
1184 | return FALSE; |
1185 | case SVt_PVCV: |
8ebc5c01 |
1186 | cv = (CV*)sv; |
1187 | break; |
a0d0e21e |
1188 | case SVt_PVGV: |
8ebc5c01 |
1189 | if (!(cv = GvCVu((GV*)sv))) |
f6ec51f7 |
1190 | cv = sv_2cv(sv, &stash, &gv, FALSE); |
8ebc5c01 |
1191 | break; |
a0d0e21e |
1192 | } |
1193 | if (cv) filled=1; |
1194 | else { |
cea2e8a9 |
1195 | Perl_croak(aTHX_ "Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1196 | cp,HvNAME(stash)); |
1197 | return FALSE; |
1198 | } |
1199 | } |
a6006777 |
1200 | #else |
1201 | { |
1202 | int filled = 0; |
1203 | int i; |
9607fc9c |
1204 | const char *cp; |
a6006777 |
1205 | SV* sv = NULL; |
a6006777 |
1206 | |
22c35a8c |
1207 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1208 | |
155aba94 |
1209 | if ((cp = PL_AMG_names[0])) { |
a6006777 |
1210 | /* Try to find via inheritance. */ |
774d564b |
1211 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
155aba94 |
1212 | if (gv) |
1213 | sv = GvSV(gv); |
1214 | |
1215 | if (!gv) |
1216 | goto no_table; |
1217 | else if (SvTRUE(sv)) |
1218 | amt.fallback=AMGfallYES; |
1219 | else if (SvOK(sv)) |
1220 | amt.fallback=AMGfallNEVER; |
a6006777 |
1221 | } |
1222 | |
1223 | for (i = 1; i < NofAMmeth; i++) { |
cea2e8a9 |
1224 | SV *cookie = sv_2mortal(Perl_newSVpvf(aTHX_ "(%s", cp = PL_AMG_names[i])); |
1225 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
44a8e56a |
1226 | cp, HvNAME(stash)) ); |
46fc3d4c |
1227 | /* don't fill the cache while looking up! */ |
1228 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
1229 | cv = 0; |
44a8e56a |
1230 | if(gv && (cv = GvCV(gv))) { |
44a8e56a |
1231 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1232 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1233 | /* GvSV contains the name of the method. */ |
1234 | GV *ngv; |
1235 | |
cea2e8a9 |
1236 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
2d8e6c8d |
1237 | SvPV(GvSV(gv), n_a), cp, HvNAME(stash)) ); |
dc848c6f |
1238 | if (!SvPOK(GvSV(gv)) |
1239 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1240 | FALSE))) |
1241 | { |
44a8e56a |
1242 | /* Can be an import stub (created by `can'). */ |
1243 | if (GvCVGEN(gv)) { |
cea2e8a9 |
1244 | Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1245 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1246 | cp, HvNAME(stash)); |
1247 | } else |
cea2e8a9 |
1248 | Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1249 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1250 | cp, HvNAME(stash)); |
1251 | } |
dc848c6f |
1252 | cv = GvCV(gv = ngv); |
44a8e56a |
1253 | } |
cea2e8a9 |
1254 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
44a8e56a |
1255 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1256 | GvNAME(CvGV(cv))) ); |
1257 | filled = 1; |
1258 | } |
a6006777 |
1259 | #endif |
1260 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1261 | } |
a0d0e21e |
1262 | if (filled) { |
a6006777 |
1263 | AMT_AMAGIC_on(&amt); |
1264 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1265 | return TRUE; |
1266 | } |
1267 | } |
a6006777 |
1268 | /* Here we have no table: */ |
774d564b |
1269 | no_table: |
a6006777 |
1270 | AMT_AMAGIC_off(&amt); |
1271 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1272 | return FALSE; |
1273 | } |
1274 | |
a0d0e21e |
1275 | SV* |
864dbfa3 |
1276 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1277 | { |
11343788 |
1278 | dTHR; |
a0d0e21e |
1279 | MAGIC *mg; |
1280 | CV *cv; |
1281 | CV **cvp=NULL, **ocvp=NULL; |
1282 | AMT *amtp, *oamtp; |
1283 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
ee239bfe |
1284 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
a0d0e21e |
1285 | HV* stash; |
1286 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1287 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
a6006777 |
1288 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1289 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1290 | : (CV **) NULL)) |
748a9306 |
1291 | && ((cv = cvp[off=method+assignshift]) |
1292 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1293 | * usual method */ |
1294 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1295 | lr = -1; /* Call method for left argument */ |
1296 | } else { |
1297 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1298 | int logic; |
1299 | |
1300 | /* look for substituted methods */ |
ee239bfe |
1301 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1302 | switch (method) { |
1303 | case inc_amg: |
ee239bfe |
1304 | force_cpy = 1; |
1305 | if ((cv = cvp[off=add_ass_amg]) |
1306 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1307 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1308 | } |
1309 | break; |
1310 | case dec_amg: |
ee239bfe |
1311 | force_cpy = 1; |
1312 | if ((cv = cvp[off = subtr_ass_amg]) |
1313 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1314 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1315 | } |
1316 | break; |
1317 | case bool__amg: |
1318 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1319 | break; |
1320 | case numer_amg: |
1321 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1322 | break; |
1323 | case string_amg: |
1324 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1325 | break; |
dc437b57 |
1326 | case not_amg: |
1327 | (void)((cv = cvp[off=bool__amg]) |
1328 | || (cv = cvp[off=numer_amg]) |
1329 | || (cv = cvp[off=string_amg])); |
1330 | postpr = 1; |
1331 | break; |
748a9306 |
1332 | case copy_amg: |
1333 | { |
76e3520e |
1334 | /* |
1335 | * SV* ref causes confusion with the interpreter variable of |
1336 | * the same name |
1337 | */ |
1338 | SV* tmpRef=SvRV(left); |
1339 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1340 | /* |
1341 | * Just to be extra cautious. Maybe in some |
1342 | * additional cases sv_setsv is safe, too. |
1343 | */ |
76e3520e |
1344 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1345 | SvOBJECT_on(newref); |
76e3520e |
1346 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1347 | return newref; |
1348 | } |
1349 | } |
1350 | break; |
a0d0e21e |
1351 | case abs_amg: |
748a9306 |
1352 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1353 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1354 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1355 | if (off1==lt_amg) { |
748a9306 |
1356 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1357 | lt_amg,AMGf_noright); |
1358 | logic = SvTRUE(lessp); |
1359 | } else { |
748a9306 |
1360 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1361 | ncmp_amg,AMGf_noright); |
1362 | logic = (SvNV(lessp) < 0); |
1363 | } |
1364 | if (logic) { |
1365 | if (off==subtr_amg) { |
1366 | right = left; |
748a9306 |
1367 | left = nullsv; |
a0d0e21e |
1368 | lr = 1; |
1369 | } |
1370 | } else { |
1371 | return left; |
1372 | } |
1373 | } |
1374 | break; |
1375 | case neg_amg: |
155aba94 |
1376 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1377 | right = left; |
1378 | left = sv_2mortal(newSViv(0)); |
1379 | lr = 1; |
1380 | } |
1381 | break; |
f5284f61 |
1382 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
1383 | case to_sv_amg: |
1384 | case to_av_amg: |
1385 | case to_hv_amg: |
1386 | case to_gv_amg: |
1387 | case to_cv_amg: |
1388 | /* FAIL safe */ |
1389 | return NULL; /* Delegate operation to standard mechanisms. */ |
1390 | break; |
a0d0e21e |
1391 | default: |
1392 | goto not_found; |
1393 | } |
1394 | if (!cv) goto not_found; |
1395 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1396 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
a6006777 |
1397 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1398 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1399 | : (CV **) NULL)) |
a0d0e21e |
1400 | && (cv = cvp[off=method])) { /* Method for right |
1401 | * argument found */ |
1402 | lr=1; |
748a9306 |
1403 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 |
1404 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1405 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1406 | && !(flags & AMGf_unary)) { |
1407 | /* We look for substitution for |
1408 | * comparison operations and |
fc36a67e |
1409 | * concatenation */ |
a0d0e21e |
1410 | if (method==concat_amg || method==concat_ass_amg |
1411 | || method==repeat_amg || method==repeat_ass_amg) { |
1412 | return NULL; /* Delegate operation to string conversion */ |
1413 | } |
1414 | off = -1; |
1415 | switch (method) { |
1416 | case lt_amg: |
1417 | case le_amg: |
1418 | case gt_amg: |
1419 | case ge_amg: |
1420 | case eq_amg: |
1421 | case ne_amg: |
1422 | postpr = 1; off=ncmp_amg; break; |
1423 | case slt_amg: |
1424 | case sle_amg: |
1425 | case sgt_amg: |
1426 | case sge_amg: |
1427 | case seq_amg: |
1428 | case sne_amg: |
1429 | postpr = 1; off=scmp_amg; break; |
1430 | } |
1431 | if (off != -1) cv = cvp[off]; |
1432 | if (!cv) { |
1433 | goto not_found; |
1434 | } |
1435 | } else { |
a6006777 |
1436 | not_found: /* No method found, either report or croak */ |
a0d0e21e |
1437 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1438 | notfound = 1; lr = -1; |
1439 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1440 | notfound = 1; lr = 1; |
1441 | } else { |
46fc3d4c |
1442 | SV *msg; |
774d564b |
1443 | if (off==-1) off=method; |
cea2e8a9 |
1444 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
46fc3d4c |
1445 | "Operation `%s': no method found,%sargument %s%s%s%s", |
22c35a8c |
1446 | PL_AMG_names[method + assignshift], |
e7ea3e70 |
1447 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e |
1448 | SvAMAGIC(left)? |
1449 | "in overloaded package ": |
1450 | "has no overloaded magic", |
1451 | SvAMAGIC(left)? |
1452 | HvNAME(SvSTASH(SvRV(left))): |
1453 | "", |
1454 | SvAMAGIC(right)? |
e7ea3e70 |
1455 | ",\n\tright argument in overloaded package ": |
1456 | (flags & AMGf_unary |
1457 | ? "" |
1458 | : ",\n\tright argument has no overloaded magic"), |
a0d0e21e |
1459 | SvAMAGIC(right)? |
1460 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1461 | "")); |
a0d0e21e |
1462 | if (amtp && amtp->fallback >= AMGfallYES) { |
cea2e8a9 |
1463 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
a0d0e21e |
1464 | } else { |
894356b3 |
1465 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1466 | } |
1467 | return NULL; |
1468 | } |
ee239bfe |
1469 | force_cpy = force_cpy || assign; |
a0d0e21e |
1470 | } |
1471 | } |
1472 | if (!notfound) { |
cea2e8a9 |
1473 | DEBUG_o( Perl_deb(aTHX_ |
46fc3d4c |
1474 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
22c35a8c |
1475 | PL_AMG_names[off], |
748a9306 |
1476 | method+assignshift==off? "" : |
1477 | " (initially `", |
1478 | method+assignshift==off? "" : |
22c35a8c |
1479 | PL_AMG_names[method+assignshift], |
748a9306 |
1480 | method+assignshift==off? "" : "')", |
1481 | flags & AMGf_unary? "" : |
1482 | lr==1 ? " for right argument": " for left argument", |
1483 | flags & AMGf_unary? " for argument" : "", |
a0d0e21e |
1484 | HvNAME(stash), |
1485 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1486 | } |
748a9306 |
1487 | /* Since we use shallow copy during assignment, we need |
1488 | * to dublicate the contents, probably calling user-supplied |
1489 | * version of copy operator |
1490 | */ |
ee239bfe |
1491 | /* We need to copy in following cases: |
1492 | * a) Assignment form was called. |
1493 | * assignshift==1, assign==T, method + 1 == off |
1494 | * b) Increment or decrement, called directly. |
1495 | * assignshift==0, assign==0, method + 0 == off |
1496 | * c) Increment or decrement, translated to assignment add/subtr. |
1497 | * assignshift==0, assign==T, |
1498 | * force_cpy == T |
1499 | * d) Increment or decrement, translated to nomethod. |
1500 | * assignshift==0, assign==0, |
1501 | * force_cpy == T |
1502 | * e) Assignment form translated to nomethod. |
1503 | * assignshift==1, assign==T, method + 1 != off |
1504 | * force_cpy == T |
1505 | */ |
1506 | /* off is method, method+assignshift, or a result of opcode substitution. |
1507 | * In the latter case assignshift==0, so only notfound case is important. |
1508 | */ |
1509 | if (( (method + assignshift == off) |
1510 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1511 | || force_cpy) |
1512 | RvDEEPCP(left); |
a0d0e21e |
1513 | { |
1514 | dSP; |
1515 | BINOP myop; |
1516 | SV* res; |
54310121 |
1517 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1518 | |
54310121 |
1519 | CATCH_SET(TRUE); |
a0d0e21e |
1520 | Zero(&myop, 1, BINOP); |
1521 | myop.op_last = (OP *) &myop; |
1522 | myop.op_next = Nullop; |
54310121 |
1523 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1524 | |
e788e7d3 |
1525 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1526 | ENTER; |
462e5cf6 |
1527 | SAVEOP(); |
533c011a |
1528 | PL_op = (OP *) &myop; |
3280af22 |
1529 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1530 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1531 | PUTBACK; |
cea2e8a9 |
1532 | pp_pushmark(); |
a0d0e21e |
1533 | |
924508f0 |
1534 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1535 | PUSHs(lr>0? right: left); |
1536 | PUSHs(lr>0? left: right); |
3280af22 |
1537 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1538 | if (notfound) { |
22c35a8c |
1539 | PUSHs( sv_2mortal(newSVpv((char *)PL_AMG_names[method + assignshift],0))); |
a0d0e21e |
1540 | } |
1541 | PUSHs((SV*)cv); |
1542 | PUTBACK; |
1543 | |
155aba94 |
1544 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1545 | CALLRUNOPS(aTHX); |
a0d0e21e |
1546 | LEAVE; |
1547 | SPAGAIN; |
1548 | |
1549 | res=POPs; |
ebafeae7 |
1550 | PUTBACK; |
d3acc0f7 |
1551 | POPSTACK; |
54310121 |
1552 | CATCH_SET(oldcatch); |
a0d0e21e |
1553 | |
a0d0e21e |
1554 | if (postpr) { |
1555 | int ans; |
1556 | switch (method) { |
1557 | case le_amg: |
1558 | case sle_amg: |
1559 | ans=SvIV(res)<=0; break; |
1560 | case lt_amg: |
1561 | case slt_amg: |
1562 | ans=SvIV(res)<0; break; |
1563 | case ge_amg: |
1564 | case sge_amg: |
1565 | ans=SvIV(res)>=0; break; |
1566 | case gt_amg: |
1567 | case sgt_amg: |
1568 | ans=SvIV(res)>0; break; |
1569 | case eq_amg: |
1570 | case seq_amg: |
1571 | ans=SvIV(res)==0; break; |
1572 | case ne_amg: |
1573 | case sne_amg: |
1574 | ans=SvIV(res)!=0; break; |
1575 | case inc_amg: |
1576 | case dec_amg: |
bbce6d69 |
1577 | SvSetSV(left,res); return left; |
dc437b57 |
1578 | case not_amg: |
fe7ac86a |
1579 | ans=!SvTRUE(res); break; |
a0d0e21e |
1580 | } |
54310121 |
1581 | return boolSV(ans); |
748a9306 |
1582 | } else if (method==copy_amg) { |
1583 | if (!SvROK(res)) { |
cea2e8a9 |
1584 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1585 | } |
1586 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1587 | } else { |
1588 | return res; |
1589 | } |
1590 | } |
1591 | } |
c9d5ac95 |
1592 | |
1593 | /* |
1594 | =for apidoc is_gv_magical |
1595 | |
1596 | Returns C<TRUE> if given the name of a magical GV. |
1597 | |
1598 | Currently only useful internally when determining if a GV should be |
1599 | created even in rvalue contexts. |
1600 | |
1601 | C<flags> is not used at present but available for future extension to |
1602 | allow selecting particular classes of magical variable. |
1603 | |
1604 | =cut |
1605 | */ |
1606 | bool |
1607 | Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) |
1608 | { |
1609 | if (!len) |
1610 | return FALSE; |
1611 | |
1612 | switch (*name) { |
1613 | case 'I': |
1614 | if (len == 3 && strEQ(name, "ISA")) |
1615 | goto yes; |
1616 | break; |
1617 | case 'O': |
1618 | if (len == 8 && strEQ(name, "OVERLOAD")) |
1619 | goto yes; |
1620 | break; |
1621 | case 'S': |
1622 | if (len == 3 && strEQ(name, "SIG")) |
1623 | goto yes; |
1624 | break; |
1625 | case '\027': /* $^W & $^WARNING_BITS */ |
1626 | if (len == 1 |
1627 | || (len == 12 && strEQ(name, "\027ARNING_BITS")) |
1628 | || (len == 17 && strEQ(name, "\027IDE_SYSTEM_CALLS"))) |
1629 | { |
1630 | goto yes; |
1631 | } |
1632 | break; |
1633 | |
1634 | case '&': |
1635 | case '`': |
1636 | case '\'': |
1637 | case ':': |
1638 | case '?': |
1639 | case '!': |
1640 | case '-': |
1641 | case '#': |
1642 | case '*': |
1643 | case '[': |
1644 | case '^': |
1645 | case '~': |
1646 | case '=': |
1647 | case '%': |
1648 | case '.': |
1649 | case '(': |
1650 | case ')': |
1651 | case '<': |
1652 | case '>': |
1653 | case ',': |
1654 | case '\\': |
1655 | case '/': |
1656 | case '|': |
1657 | case '+': |
1658 | case ';': |
1659 | case ']': |
1660 | case '\001': /* $^A */ |
1661 | case '\003': /* $^C */ |
1662 | case '\004': /* $^D */ |
1663 | case '\005': /* $^E */ |
1664 | case '\006': /* $^F */ |
1665 | case '\010': /* $^H */ |
1666 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1667 | case '\014': /* $^L */ |
1668 | case '\017': /* $^O */ |
1669 | case '\020': /* $^P */ |
1670 | case '\023': /* $^S */ |
1671 | case '\024': /* $^T */ |
1672 | case '\026': /* $^V */ |
1673 | if (len == 1) |
1674 | goto yes; |
1675 | break; |
1676 | case '1': |
1677 | case '2': |
1678 | case '3': |
1679 | case '4': |
1680 | case '5': |
1681 | case '6': |
1682 | case '7': |
1683 | case '8': |
1684 | case '9': |
1685 | if (len > 1) { |
1686 | char *end = name + len; |
1687 | while (--end > name) { |
1688 | if (!isDIGIT(*end)) |
1689 | return FALSE; |
1690 | } |
1691 | } |
1692 | yes: |
1693 | return TRUE; |
1694 | default: |
1695 | break; |
1696 | } |
1697 | return FALSE; |
1698 | } |