Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
bc89e66f |
3 | * Copyright (c) 1991-2001, Larry Wall |
79072805 |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
7 | * |
a0d0e21e |
8 | */ |
9 | |
10 | /* |
11 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure |
12 | * of your inquisitiveness, I shall spend all the rest of my days answering |
13 | * you. What more do you want to know?' |
14 | * 'The names of all the stars, and of all living things, and the whole |
15 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' |
16 | * laughed Pippin. |
79072805 |
17 | */ |
18 | |
19 | #include "EXTERN.h" |
864dbfa3 |
20 | #define PERL_IN_GV_C |
79072805 |
21 | #include "perl.h" |
22 | |
23 | GV * |
864dbfa3 |
24 | Perl_gv_AVadd(pTHX_ register GV *gv) |
79072805 |
25 | { |
a0d0e21e |
26 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
27 | Perl_croak(aTHX_ "Bad symbol for array"); |
79072805 |
28 | if (!GvAV(gv)) |
29 | GvAV(gv) = newAV(); |
30 | return gv; |
31 | } |
32 | |
33 | GV * |
864dbfa3 |
34 | Perl_gv_HVadd(pTHX_ register GV *gv) |
79072805 |
35 | { |
a0d0e21e |
36 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
37 | Perl_croak(aTHX_ "Bad symbol for hash"); |
79072805 |
38 | if (!GvHV(gv)) |
463ee0b2 |
39 | GvHV(gv) = newHV(); |
79072805 |
40 | return gv; |
41 | } |
42 | |
43 | GV * |
864dbfa3 |
44 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e |
45 | { |
46 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 |
47 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
5bd07a3d |
48 | if (!GvIOp(gv)) { |
49 | #ifdef GV_SHARED_CHECK |
50 | if (GvSHARED(gv)) { |
51 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is shared)"); |
52 | } |
53 | #endif |
a0d0e21e |
54 | GvIOp(gv) = newIO(); |
5bd07a3d |
55 | } |
a0d0e21e |
56 | return gv; |
57 | } |
58 | |
59 | GV * |
864dbfa3 |
60 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 |
61 | { |
eacec437 |
62 | char smallbuf[256]; |
53d95988 |
63 | char *tmpbuf; |
8ebc5c01 |
64 | STRLEN tmplen; |
79072805 |
65 | GV *gv; |
66 | |
1d7c1841 |
67 | if (!PL_defstash) |
68 | return Nullgv; |
69 | |
53d95988 |
70 | tmplen = strlen(name) + 2; |
71 | if (tmplen < sizeof smallbuf) |
72 | tmpbuf = smallbuf; |
73 | else |
74 | New(603, tmpbuf, tmplen + 1, char); |
75 | tmpbuf[0] = '_'; |
76 | tmpbuf[1] = '<'; |
77 | strcpy(tmpbuf + 2, name); |
3280af22 |
78 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 |
79 | if (!isGV(gv)) { |
3280af22 |
80 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
1d7c1841 |
81 | sv_setpv(GvSV(gv), name); |
82 | if (PERLDB_LINE) |
14befaf4 |
83 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile); |
1d7c1841 |
84 | } |
53d95988 |
85 | if (tmpbuf != smallbuf) |
86 | Safefree(tmpbuf); |
79072805 |
87 | return gv; |
88 | } |
89 | |
463ee0b2 |
90 | void |
864dbfa3 |
91 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 |
92 | { |
93 | register GP *gp; |
55d729e4 |
94 | bool doproto = SvTYPE(gv) > SVt_NULL; |
95 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
463ee0b2 |
96 | |
dc437b57 |
97 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
98 | if (SvLEN(gv)) { |
99 | if (proto) { |
100 | SvPVX(gv) = NULL; |
101 | SvLEN(gv) = 0; |
102 | SvPOK_off(gv); |
103 | } else |
104 | Safefree(SvPVX(gv)); |
105 | } |
44a8e56a |
106 | Newz(602, gp, 1, GP); |
8990e307 |
107 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
108 | GvSV(gv) = NEWSV(72,0); |
1d7c1841 |
109 | GvLINE(gv) = CopLINE(PL_curcop); |
110 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; |
005a453c |
111 | GvCVGEN(gv) = 0; |
463ee0b2 |
112 | GvEGV(gv) = gv; |
14befaf4 |
113 | sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0); |
85aff577 |
114 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e |
115 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
116 | GvNAMELEN(gv) = len; |
23ad5bf5 |
117 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 |
118 | GvMULTI_on(gv); |
55d729e4 |
119 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
120 | SvIOK_off(gv); |
55d729e4 |
121 | ENTER; |
b099ddc0 |
122 | /* XXX unsafe for threads if eval_owner isn't held */ |
55d729e4 |
123 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 |
124 | GvCV(gv) = PL_compcv; |
55d729e4 |
125 | LEAVE; |
126 | |
3280af22 |
127 | PL_sub_generation++; |
65c50114 |
128 | CvGV(GvCV(gv)) = gv; |
1d7c1841 |
129 | CvFILE(GvCV(gv)) = CopFILE(PL_curcop); |
3280af22 |
130 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
131 | #ifdef USE_THREADS |
132 | CvOWNER(GvCV(gv)) = 0; |
1cfa4ec7 |
133 | if (!CvMUTEXP(GvCV(gv))) { |
b0a484d2 |
134 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
1cfa4ec7 |
135 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
136 | } |
55d729e4 |
137 | #endif /* USE_THREADS */ |
138 | if (proto) { |
139 | sv_setpv((SV*)GvCV(gv), proto); |
140 | Safefree(proto); |
141 | } |
142 | } |
463ee0b2 |
143 | } |
144 | |
76e3520e |
145 | STATIC void |
cea2e8a9 |
146 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e |
147 | { |
148 | switch (sv_type) { |
149 | case SVt_PVIO: |
150 | (void)GvIOn(gv); |
151 | break; |
152 | case SVt_PVAV: |
153 | (void)GvAVn(gv); |
154 | break; |
155 | case SVt_PVHV: |
156 | (void)GvHVn(gv); |
157 | break; |
158 | } |
159 | } |
160 | |
954c1994 |
161 | /* |
162 | =for apidoc gv_fetchmeth |
163 | |
164 | Returns the glob with the given C<name> and a defined subroutine or |
165 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
07766739 |
166 | accessible via @ISA and UNIVERSAL::. |
954c1994 |
167 | |
168 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
169 | side-effect creates a glob with the given C<name> in the given C<stash> |
170 | which in the case of success contains an alias for the subroutine, and sets |
b267980d |
171 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
172 | |
173 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
174 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b |
175 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 |
176 | the GV directly; instead, you should use the method's CV, which can be |
b267980d |
177 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
178 | |
179 | =cut |
180 | */ |
181 | |
79072805 |
182 | GV * |
864dbfa3 |
183 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 |
184 | { |
185 | AV* av; |
463ee0b2 |
186 | GV* topgv; |
79072805 |
187 | GV* gv; |
463ee0b2 |
188 | GV** gvp; |
748a9306 |
189 | CV* cv; |
a0d0e21e |
190 | |
191 | if (!stash) |
192 | return 0; |
1db89ea5 |
193 | if (!HvNAME(stash)) |
194 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
44a8e56a |
195 | if ((level > 100) || (level < -100)) |
cea2e8a9 |
196 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
3e0ccd42 |
197 | name, HvNAME(stash)); |
463ee0b2 |
198 | |
cea2e8a9 |
199 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
200 | |
201 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
202 | if (!gvp) |
203 | topgv = Nullgv; |
204 | else { |
205 | topgv = *gvp; |
206 | if (SvTYPE(topgv) != SVt_PVGV) |
207 | gv_init(topgv, stash, name, len, TRUE); |
155aba94 |
208 | if ((cv = GvCV(topgv))) { |
44a8e56a |
209 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
210 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
211 | return topgv; |
44a8e56a |
212 | /* Stale cached entry: junk it */ |
213 | SvREFCNT_dec(cv); |
214 | GvCV(topgv) = cv = Nullcv; |
215 | GvCVGEN(topgv) = 0; |
748a9306 |
216 | } |
3280af22 |
217 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
218 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
219 | } |
79072805 |
220 | |
9607fc9c |
221 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
222 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
223 | |
fb73857a |
224 | /* create and re-create @.*::SUPER::ISA on demand */ |
225 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
226 | char* packname = HvNAME(stash); |
227 | STRLEN packlen = strlen(packname); |
228 | |
229 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
230 | HV* basestash; |
231 | |
232 | packlen -= 7; |
233 | basestash = gv_stashpvn(packname, packlen, TRUE); |
234 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
235 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
9607fc9c |
236 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
237 | if (!gvp || !(gv = *gvp)) |
cea2e8a9 |
238 | Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); |
9607fc9c |
239 | if (SvTYPE(gv) != SVt_PVGV) |
240 | gv_init(gv, stash, "ISA", 3, TRUE); |
241 | SvREFCNT_dec(GvAV(gv)); |
242 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
243 | } |
244 | } |
245 | } |
246 | |
247 | if (av) { |
79072805 |
248 | SV** svp = AvARRAY(av); |
93965878 |
249 | /* NOTE: No support for tied ISA */ |
250 | I32 items = AvFILLp(av) + 1; |
79072805 |
251 | while (items--) { |
79072805 |
252 | SV* sv = *svp++; |
a0d0e21e |
253 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
254 | if (!basestash) { |
599cee73 |
255 | if (ckWARN(WARN_MISC)) |
cea2e8a9 |
256 | Perl_warner(aTHX_ WARN_MISC, "Can't locate package %s for @%s::ISA", |
463ee0b2 |
257 | SvPVX(sv), HvNAME(stash)); |
79072805 |
258 | continue; |
259 | } |
44a8e56a |
260 | gv = gv_fetchmeth(basestash, name, len, |
261 | (level >= 0) ? level + 1 : level - 1); |
262 | if (gv) |
263 | goto gotcha; |
79072805 |
264 | } |
265 | } |
a0d0e21e |
266 | |
9607fc9c |
267 | /* if at top level, try UNIVERSAL */ |
268 | |
44a8e56a |
269 | if (level == 0 || level == -1) { |
9607fc9c |
270 | HV* lastchance; |
271 | |
155aba94 |
272 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
273 | if ((gv = gv_fetchmeth(lastchance, name, len, |
274 | (level >= 0) ? level + 1 : level - 1))) |
275 | { |
44a8e56a |
276 | gotcha: |
dc848c6f |
277 | /* |
278 | * Cache method in topgv if: |
279 | * 1. topgv has no synonyms (else inheritance crosses wires) |
280 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
281 | */ |
282 | if (topgv && |
283 | GvREFCNT(topgv) == 1 && |
284 | (cv = GvCV(gv)) && |
285 | (CvROOT(cv) || CvXSUB(cv))) |
286 | { |
155aba94 |
287 | if ((cv = GvCV(topgv))) |
44a8e56a |
288 | SvREFCNT_dec(cv); |
289 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
290 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
291 | } |
a0d0e21e |
292 | return gv; |
293 | } |
005a453c |
294 | else if (topgv && GvREFCNT(topgv) == 1) { |
295 | /* cache the fact that the method is not defined */ |
3280af22 |
296 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
297 | } |
a0d0e21e |
298 | } |
299 | } |
300 | |
79072805 |
301 | return 0; |
302 | } |
303 | |
954c1994 |
304 | /* |
305 | =for apidoc gv_fetchmethod |
306 | |
6d0f518e |
307 | See L<gv_fetchmethod_autoload>. |
954c1994 |
308 | |
309 | =cut |
310 | */ |
311 | |
79072805 |
312 | GV * |
864dbfa3 |
313 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
463ee0b2 |
314 | { |
dc848c6f |
315 | return gv_fetchmethod_autoload(stash, name, TRUE); |
316 | } |
317 | |
954c1994 |
318 | /* |
319 | =for apidoc gv_fetchmethod_autoload |
320 | |
321 | Returns the glob which contains the subroutine to call to invoke the method |
322 | on the C<stash>. In fact in the presence of autoloading this may be the |
323 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
b267980d |
324 | already setup. |
954c1994 |
325 | |
326 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
327 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
b267980d |
328 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
329 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
330 | with a non-zero C<autoload> parameter. |
954c1994 |
331 | |
332 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
333 | that if you want to keep the returned glob for a long time, you need to |
334 | check for it being "AUTOLOAD", since at the later time the call may load a |
335 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
b267980d |
336 | created via a side effect to do this. |
954c1994 |
337 | |
338 | These functions have the same side-effects and as C<gv_fetchmeth> with |
339 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
340 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
b267980d |
341 | C<call_sv> apply equally to these functions. |
954c1994 |
342 | |
343 | =cut |
344 | */ |
345 | |
dc848c6f |
346 | GV * |
864dbfa3 |
347 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f |
348 | { |
08105a92 |
349 | register const char *nend; |
350 | const char *nsplit = 0; |
a0d0e21e |
351 | GV* gv; |
b267980d |
352 | |
463ee0b2 |
353 | for (nend = name; *nend; nend++) { |
9607fc9c |
354 | if (*nend == '\'') |
a0d0e21e |
355 | nsplit = nend; |
9607fc9c |
356 | else if (*nend == ':' && *(nend + 1) == ':') |
357 | nsplit = ++nend; |
a0d0e21e |
358 | } |
359 | if (nsplit) { |
08105a92 |
360 | const char *origname = name; |
a0d0e21e |
361 | name = nsplit + 1; |
a0d0e21e |
362 | if (*nsplit == ':') |
363 | --nsplit; |
9607fc9c |
364 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
365 | /* ->SUPER::method should really be looked up in original stash */ |
cea2e8a9 |
366 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 |
367 | CopSTASHPV(PL_curcop))); |
9607fc9c |
368 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 |
369 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
9607fc9c |
370 | origname, HvNAME(stash), name) ); |
4633a7c4 |
371 | } |
9607fc9c |
372 | else |
373 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
4633a7c4 |
374 | } |
375 | |
9607fc9c |
376 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
377 | if (!gv) { |
2f6e0fe7 |
378 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 |
379 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
380 | else if (autoload) |
54310121 |
381 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
382 | } |
dc848c6f |
383 | else if (autoload) { |
384 | CV* cv = GvCV(gv); |
09280a33 |
385 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
386 | GV* stubgv; |
387 | GV* autogv; |
388 | |
389 | if (CvANON(cv)) |
390 | stubgv = gv; |
391 | else { |
392 | stubgv = CvGV(cv); |
393 | if (GvCV(stubgv) != cv) /* orphaned import */ |
394 | stubgv = gv; |
395 | } |
396 | autogv = gv_autoload4(GvSTASH(stubgv), |
397 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
398 | if (autogv) |
399 | gv = autogv; |
400 | } |
401 | } |
44a8e56a |
402 | |
403 | return gv; |
404 | } |
405 | |
406 | GV* |
864dbfa3 |
407 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a |
408 | { |
409 | static char autoload[] = "AUTOLOAD"; |
410 | static STRLEN autolen = 8; |
411 | GV* gv; |
412 | CV* cv; |
413 | HV* varstash; |
414 | GV* vargv; |
415 | SV* varsv; |
416 | |
417 | if (len == autolen && strnEQ(name, autoload, autolen)) |
418 | return Nullgv; |
dc848c6f |
419 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
420 | return Nullgv; |
421 | cv = GvCV(gv); |
422 | |
adb5a9ae |
423 | if (!(CvROOT(cv) || CvXSUB(cv))) |
ed850460 |
424 | return Nullgv; |
425 | |
dc848c6f |
426 | /* |
427 | * Inheriting AUTOLOAD for non-methods works ... for now. |
428 | */ |
b267980d |
429 | if (ckWARN(WARN_DEPRECATED) && !method && |
599cee73 |
430 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
cea2e8a9 |
431 | Perl_warner(aTHX_ WARN_DEPRECATED, |
dc848c6f |
432 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
433 | HvNAME(stash), (int)len, name); |
44a8e56a |
434 | |
adb5a9ae |
435 | #ifndef USE_THREADS |
436 | if (CvXSUB(cv)) { |
437 | /* rather than lookup/init $AUTOLOAD here |
438 | * only to have the XSUB do another lookup for $AUTOLOAD |
439 | * and split that value on the last '::', |
440 | * pass along the same data via some unused fields in the CV |
441 | */ |
442 | CvSTASH(cv) = stash; |
443 | SvPVX(cv) = (char *)name; /* cast to loose constness warning */ |
444 | SvCUR(cv) = len; |
445 | return gv; |
446 | } |
447 | #endif |
448 | |
44a8e56a |
449 | /* |
450 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
451 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
452 | * use that, but for lack of anything better we will use the sub's |
453 | * original package to look up $AUTOLOAD. |
454 | */ |
455 | varstash = GvSTASH(CvGV(cv)); |
456 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
3d35f11b |
457 | ENTER; |
458 | |
459 | #ifdef USE_THREADS |
4755096e |
460 | sv_lock((SV *)varstash); |
3d35f11b |
461 | #endif |
44a8e56a |
462 | if (!isGV(vargv)) |
463 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
3d35f11b |
464 | LEAVE; |
44a8e56a |
465 | varsv = GvSV(vargv); |
3d35f11b |
466 | #ifdef USE_THREADS |
4755096e |
467 | sv_lock(varsv); |
3d35f11b |
468 | #endif |
44a8e56a |
469 | sv_setpv(varsv, HvNAME(stash)); |
470 | sv_catpvn(varsv, "::", 2); |
471 | sv_catpvn(varsv, name, len); |
472 | SvTAINTED_off(varsv); |
a0d0e21e |
473 | return gv; |
474 | } |
475 | |
d2c93421 |
476 | /* The "gv" parameter should be the glob known to Perl code as *! |
477 | * The scalar must already have been magicalized. |
478 | */ |
479 | STATIC void |
480 | S_require_errno(pTHX_ GV *gv) |
481 | { |
482 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
483 | |
484 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
485 | dSP; |
486 | PUTBACK; |
487 | ENTER; |
488 | save_scalar(gv); /* keep the value of $! */ |
489 | require_pv("Errno.pm"); |
490 | LEAVE; |
491 | SPAGAIN; |
492 | stash = gv_stashpvn("Errno",5,FALSE); |
493 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
494 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
495 | } |
496 | } |
497 | |
954c1994 |
498 | /* |
499 | =for apidoc gv_stashpv |
500 | |
386d01d6 |
501 | Returns a pointer to the stash for a specified package. C<name> should |
502 | be a valid UTF-8 string. If C<create> is set then the package will be |
503 | created if it does not already exist. If C<create> is not set and the |
504 | package does not exist then NULL is returned. |
954c1994 |
505 | |
506 | =cut |
507 | */ |
508 | |
a0d0e21e |
509 | HV* |
864dbfa3 |
510 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
511 | { |
dc437b57 |
512 | return gv_stashpvn(name, strlen(name), create); |
513 | } |
514 | |
515 | HV* |
864dbfa3 |
516 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
517 | { |
46fc3d4c |
518 | char smallbuf[256]; |
519 | char *tmpbuf; |
a0d0e21e |
520 | HV *stash; |
521 | GV *tmpgv; |
dc437b57 |
522 | |
46fc3d4c |
523 | if (namelen + 3 < sizeof smallbuf) |
524 | tmpbuf = smallbuf; |
525 | else |
526 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
527 | Copy(name,tmpbuf,namelen,char); |
528 | tmpbuf[namelen++] = ':'; |
529 | tmpbuf[namelen++] = ':'; |
530 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
531 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
532 | if (tmpbuf != smallbuf) |
533 | Safefree(tmpbuf); |
a0d0e21e |
534 | if (!tmpgv) |
535 | return 0; |
536 | if (!GvHV(tmpgv)) |
537 | GvHV(tmpgv) = newHV(); |
538 | stash = GvHV(tmpgv); |
539 | if (!HvNAME(stash)) |
540 | HvNAME(stash) = savepv(name); |
541 | return stash; |
463ee0b2 |
542 | } |
543 | |
954c1994 |
544 | /* |
545 | =for apidoc gv_stashsv |
546 | |
386d01d6 |
547 | Returns a pointer to the stash for a specified package, which must be a |
548 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
549 | |
550 | =cut |
551 | */ |
552 | |
a0d0e21e |
553 | HV* |
864dbfa3 |
554 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
555 | { |
dc437b57 |
556 | register char *ptr; |
557 | STRLEN len; |
558 | ptr = SvPV(sv,len); |
559 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
560 | } |
561 | |
562 | |
463ee0b2 |
563 | GV * |
864dbfa3 |
564 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
79072805 |
565 | { |
08105a92 |
566 | register const char *name = nambeg; |
463ee0b2 |
567 | register GV *gv = 0; |
79072805 |
568 | GV**gvp; |
79072805 |
569 | I32 len; |
08105a92 |
570 | register const char *namend; |
463ee0b2 |
571 | HV *stash = 0; |
79072805 |
572 | |
c07a80fd |
573 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
574 | name++; |
575 | |
79072805 |
576 | for (namend = name; *namend; namend++) { |
1d7c1841 |
577 | if ((*namend == ':' && namend[1] == ':') |
578 | || (*namend == '\'' && namend[1])) |
463ee0b2 |
579 | { |
463ee0b2 |
580 | if (!stash) |
3280af22 |
581 | stash = PL_defstash; |
dc437b57 |
582 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
583 | return Nullgv; |
463ee0b2 |
584 | |
85e6fe83 |
585 | len = namend - name; |
586 | if (len > 0) { |
3c78fafa |
587 | char smallbuf[256]; |
62b57502 |
588 | char *tmpbuf; |
62b57502 |
589 | |
3c78fafa |
590 | if (len + 3 < sizeof smallbuf) |
591 | tmpbuf = smallbuf; |
62b57502 |
592 | else |
593 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
594 | Copy(name, tmpbuf, len, char); |
595 | tmpbuf[len++] = ':'; |
596 | tmpbuf[len++] = ':'; |
597 | tmpbuf[len] = '\0'; |
463ee0b2 |
598 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
599 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
600 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
601 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
602 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
603 | else |
604 | GvMULTI_on(gv); |
605 | } |
3c78fafa |
606 | if (tmpbuf != smallbuf) |
62b57502 |
607 | Safefree(tmpbuf); |
3280af22 |
608 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
609 | return Nullgv; |
85e6fe83 |
610 | |
463ee0b2 |
611 | if (!(stash = GvHV(gv))) |
612 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
613 | |
463ee0b2 |
614 | if (!HvNAME(stash)) |
a0d0e21e |
615 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
616 | } |
617 | |
618 | if (*namend == ':') |
619 | namend++; |
620 | namend++; |
621 | name = namend; |
622 | if (!*name) |
3280af22 |
623 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
624 | } |
79072805 |
625 | } |
a0d0e21e |
626 | len = namend - name; |
627 | if (!len) |
628 | len = 1; |
463ee0b2 |
629 | |
630 | /* No stash in name, so see how we can default */ |
631 | |
632 | if (!stash) { |
7e2040f0 |
633 | if (isIDFIRST_lazy(name)) { |
9607fc9c |
634 | bool global = FALSE; |
635 | |
463ee0b2 |
636 | if (isUPPER(*name)) { |
9d116dd7 |
637 | if (*name == 'S' && ( |
638 | strEQ(name, "SIG") || |
639 | strEQ(name, "STDIN") || |
640 | strEQ(name, "STDOUT") || |
641 | strEQ(name, "STDERR"))) |
642 | global = TRUE; |
643 | else if (*name == 'I' && strEQ(name, "INC")) |
644 | global = TRUE; |
645 | else if (*name == 'E' && strEQ(name, "ENV")) |
646 | global = TRUE; |
463ee0b2 |
647 | else if (*name == 'A' && ( |
648 | strEQ(name, "ARGV") || |
9d116dd7 |
649 | strEQ(name, "ARGVOUT"))) |
463ee0b2 |
650 | global = TRUE; |
651 | } |
652 | else if (*name == '_' && !name[1]) |
653 | global = TRUE; |
9607fc9c |
654 | |
463ee0b2 |
655 | if (global) |
3280af22 |
656 | stash = PL_defstash; |
657 | else if ((COP*)PL_curcop == &PL_compiling) { |
658 | stash = PL_curstash; |
659 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
660 | sv_type != SVt_PVCV && |
661 | sv_type != SVt_PVGV && |
4633a7c4 |
662 | sv_type != SVt_PVFM && |
c07a80fd |
663 | sv_type != SVt_PVIO && |
377b8fbc |
664 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
665 | { |
4633a7c4 |
666 | gvp = (GV**)hv_fetch(stash,name,len,0); |
667 | if (!gvp || |
3280af22 |
668 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
669 | SvTYPE(*gvp) != SVt_PVGV) |
670 | { |
4633a7c4 |
671 | stash = 0; |
a5f75d66 |
672 | } |
155aba94 |
673 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
674 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
675 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
676 | { |
cea2e8a9 |
677 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
678 | sv_type == SVt_PVAV ? '@' : |
679 | sv_type == SVt_PVHV ? '%' : '$', |
680 | name); |
8ebc5c01 |
681 | if (GvCVu(*gvp)) |
cc507455 |
682 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
683 | stash = 0; |
4633a7c4 |
684 | } |
a0d0e21e |
685 | } |
85e6fe83 |
686 | } |
463ee0b2 |
687 | else |
1d7c1841 |
688 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
689 | } |
690 | else |
3280af22 |
691 | stash = PL_defstash; |
463ee0b2 |
692 | } |
693 | |
694 | /* By this point we should have a stash and a name */ |
695 | |
a0d0e21e |
696 | if (!stash) { |
5a844595 |
697 | if (add) { |
698 | qerror(Perl_mess(aTHX_ |
699 | "Global symbol \"%s%s\" requires explicit package name", |
700 | (sv_type == SVt_PV ? "$" |
701 | : sv_type == SVt_PVAV ? "@" |
702 | : sv_type == SVt_PVHV ? "%" |
703 | : ""), name)); |
f180df80 |
704 | stash = PL_nullstash; |
a0d0e21e |
705 | } |
f180df80 |
706 | else |
707 | return Nullgv; |
a0d0e21e |
708 | } |
709 | |
710 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
711 | return Nullgv; |
712 | |
79072805 |
713 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
714 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
715 | return Nullgv; |
716 | gv = *gvp; |
717 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
718 | if (add) { |
a5f75d66 |
719 | GvMULTI_on(gv); |
a0d0e21e |
720 | gv_init_sv(gv, sv_type); |
d2c93421 |
721 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
722 | require_errno(gv); |
a0d0e21e |
723 | } |
79072805 |
724 | return gv; |
55d729e4 |
725 | } else if (add & GV_NOINIT) { |
726 | return gv; |
79072805 |
727 | } |
93a17b20 |
728 | |
729 | /* Adding a new symbol */ |
730 | |
0453d815 |
731 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
732 | Perl_warner(aTHX_ WARN_INTERNAL, "Had to create %s unexpectedly", nambeg); |
55d729e4 |
733 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
734 | gv_init_sv(gv, sv_type); |
93a17b20 |
735 | |
7272584d |
736 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
737 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 |
738 | GvMULTI_on(gv) ; |
739 | |
93a17b20 |
740 | /* set up magic where warranted */ |
741 | switch (*name) { |
a0d0e21e |
742 | case 'A': |
743 | if (strEQ(name, "ARGV")) { |
744 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
745 | } |
746 | break; |
a0d0e21e |
747 | case 'E': |
748 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
749 | GvMULTI_on(gv); |
a0d0e21e |
750 | break; |
463ee0b2 |
751 | case 'I': |
752 | if (strEQ(name, "ISA")) { |
753 | AV* av = GvAVn(gv); |
a5f75d66 |
754 | GvMULTI_on(gv); |
14befaf4 |
755 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0); |
93965878 |
756 | /* NOTE: No support for tied ISA */ |
55d729e4 |
757 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
758 | && AvFILLp(av) == -1) |
85e6fe83 |
759 | { |
a0d0e21e |
760 | char *pname; |
79cb57f6 |
761 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
dc437b57 |
762 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
763 | av_push(av, newSVpvn(pname = "DB_File",7)); |
dc437b57 |
764 | gv_stashpvn(pname, 7, TRUE); |
79cb57f6 |
765 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
dc437b57 |
766 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
767 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
dc437b57 |
768 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
769 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
dc437b57 |
770 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
771 | } |
463ee0b2 |
772 | } |
773 | break; |
a0d0e21e |
774 | case 'O': |
775 | if (strEQ(name, "OVERLOAD")) { |
776 | HV* hv = GvHVn(gv); |
a5f75d66 |
777 | GvMULTI_on(gv); |
14befaf4 |
778 | hv_magic(hv, Nullgv, PERL_MAGIC_overload); |
a0d0e21e |
779 | } |
780 | break; |
93a17b20 |
781 | case 'S': |
782 | if (strEQ(name, "SIG")) { |
783 | HV *hv; |
dc437b57 |
784 | I32 i; |
1d7c1841 |
785 | if (!PL_psig_ptr) { |
0a8e0eff |
786 | Newz(73, PL_psig_ptr, SIG_SIZE, SV*); |
787 | Newz(73, PL_psig_name, SIG_SIZE, SV*); |
788 | Newz(73, PL_psig_pend, SIG_SIZE, int); |
1d7c1841 |
789 | } |
790 | GvMULTI_on(gv); |
791 | hv = GvHVn(gv); |
14befaf4 |
792 | hv_magic(hv, Nullgv, PERL_MAGIC_sig); |
76d3c696 |
793 | for (i = 1; i < SIG_SIZE; i++) { |
dc437b57 |
794 | SV ** init; |
1d7c1841 |
795 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
796 | if (init) |
797 | sv_setsv(*init, &PL_sv_undef); |
22c35a8c |
798 | PL_psig_ptr[i] = 0; |
799 | PL_psig_name[i] = 0; |
0a8e0eff |
800 | PL_psig_pend[i] = 0; |
dc437b57 |
801 | } |
93a17b20 |
802 | } |
803 | break; |
09bef843 |
804 | case 'V': |
805 | if (strEQ(name, "VERSION")) |
806 | GvMULTI_on(gv); |
807 | break; |
93a17b20 |
808 | |
809 | case '&': |
463ee0b2 |
810 | if (len > 1) |
811 | break; |
3280af22 |
812 | PL_sawampersand = TRUE; |
a0d0e21e |
813 | goto ro_magicalize; |
93a17b20 |
814 | |
815 | case '`': |
463ee0b2 |
816 | if (len > 1) |
817 | break; |
3280af22 |
818 | PL_sawampersand = TRUE; |
a0d0e21e |
819 | goto ro_magicalize; |
93a17b20 |
820 | |
821 | case '\'': |
463ee0b2 |
822 | if (len > 1) |
823 | break; |
3280af22 |
824 | PL_sawampersand = TRUE; |
a0d0e21e |
825 | goto ro_magicalize; |
93a17b20 |
826 | |
827 | case ':': |
463ee0b2 |
828 | if (len > 1) |
829 | break; |
3280af22 |
830 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 |
831 | goto magicalize; |
832 | |
ff0cee69 |
833 | case '?': |
834 | if (len > 1) |
835 | break; |
836 | #ifdef COMPLEX_STATUS |
07f14f54 |
837 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
ff0cee69 |
838 | #endif |
839 | goto magicalize; |
840 | |
067391ea |
841 | case '!': |
4318d5a0 |
842 | if (len > 1) |
067391ea |
843 | break; |
d2c93421 |
844 | |
845 | /* If %! has been used, automatically load Errno.pm. |
846 | The require will itself set errno, so in order to |
847 | preserve its value we have to set up the magic |
848 | now (rather than going to magicalize) |
849 | */ |
850 | |
14befaf4 |
851 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 |
852 | |
853 | if (sv_type == SVt_PVHV) |
854 | require_errno(gv); |
855 | |
856 | break; |
6cef1e77 |
857 | case '-': |
858 | if (len > 1) |
859 | break; |
860 | else { |
861 | AV* av = GvAVn(gv); |
14befaf4 |
862 | sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
863 | SvREADONLY_on(av); |
6cef1e77 |
864 | } |
865 | goto magicalize; |
93a17b20 |
866 | case '#': |
a0d0e21e |
867 | case '*': |
599cee73 |
868 | if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV) |
cea2e8a9 |
869 | Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name); |
a0d0e21e |
870 | /* FALL THROUGH */ |
871 | case '[': |
93a17b20 |
872 | case '^': |
873 | case '~': |
874 | case '=': |
93a17b20 |
875 | case '%': |
876 | case '.': |
93a17b20 |
877 | case '(': |
878 | case ')': |
879 | case '<': |
880 | case '>': |
881 | case ',': |
882 | case '\\': |
883 | case '/': |
16070b82 |
884 | case '\001': /* $^A */ |
885 | case '\003': /* $^C */ |
886 | case '\004': /* $^D */ |
887 | case '\005': /* $^E */ |
888 | case '\006': /* $^F */ |
889 | case '\010': /* $^H */ |
890 | case '\011': /* $^I, NOT \t in EBCDIC */ |
16070b82 |
891 | case '\020': /* $^P */ |
892 | case '\024': /* $^T */ |
463ee0b2 |
893 | if (len > 1) |
894 | break; |
895 | goto magicalize; |
d8ce0c9a |
896 | case '|': |
897 | if (len > 1) |
898 | break; |
899 | sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
900 | goto magicalize; |
ac27b0f5 |
901 | case '\017': /* $^O & $^OPEN */ |
902 | if (len > 1 && strNE(name, "\017PEN")) |
903 | break; |
904 | goto magicalize; |
16070b82 |
905 | case '\023': /* $^S */ |
6cef1e77 |
906 | if (len > 1) |
907 | break; |
908 | goto ro_magicalize; |
6a818117 |
909 | case '\027': /* $^W & $^WARNING_BITS */ |
a50e31ad |
910 | if (len > 1 && strNE(name, "\027ARNING_BITS") |
911 | && strNE(name, "\027IDE_SYSTEM_CALLS")) |
4438c4b7 |
912 | break; |
913 | goto magicalize; |
463ee0b2 |
914 | |
a0d0e21e |
915 | case '+': |
6cef1e77 |
916 | if (len > 1) |
917 | break; |
918 | else { |
919 | AV* av = GvAVn(gv); |
14befaf4 |
920 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 |
921 | SvREADONLY_on(av); |
6cef1e77 |
922 | } |
923 | /* FALL THROUGH */ |
463ee0b2 |
924 | case '1': |
925 | case '2': |
926 | case '3': |
927 | case '4': |
928 | case '5': |
929 | case '6': |
930 | case '7': |
931 | case '8': |
932 | case '9': |
a0d0e21e |
933 | ro_magicalize: |
934 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
935 | magicalize: |
14befaf4 |
936 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
93a17b20 |
937 | break; |
938 | |
16070b82 |
939 | case '\014': /* $^L */ |
463ee0b2 |
940 | if (len > 1) |
941 | break; |
93a17b20 |
942 | sv_setpv(GvSV(gv),"\f"); |
3280af22 |
943 | PL_formfeed = GvSV(gv); |
93a17b20 |
944 | break; |
945 | case ';': |
463ee0b2 |
946 | if (len > 1) |
947 | break; |
93a17b20 |
948 | sv_setpv(GvSV(gv),"\034"); |
949 | break; |
463ee0b2 |
950 | case ']': |
951 | if (len == 1) { |
f86702cc |
952 | SV *sv = GvSV(gv); |
5089c844 |
953 | (void)SvUPGRADE(sv, SVt_PVNV); |
6a6ba966 |
954 | Perl_sv_setpvf(aTHX_ sv, |
955 | #if defined(PERL_SUBVERSION) && (PERL_SUBVERSION > 0) |
956 | "%8.6" |
957 | #else |
958 | "%5.3" |
959 | #endif |
960 | NVff, |
961 | SvNVX(PL_patchlevel)); |
5089c844 |
962 | SvNVX(sv) = SvNVX(PL_patchlevel); |
963 | SvNOK_on(sv); |
5089c844 |
964 | SvREADONLY_on(sv); |
93a17b20 |
965 | } |
966 | break; |
16070b82 |
967 | case '\026': /* $^V */ |
968 | if (len == 1) { |
969 | SV *sv = GvSV(gv); |
970 | GvSV(gv) = SvREFCNT_inc(PL_patchlevel); |
971 | SvREFCNT_dec(sv); |
972 | } |
973 | break; |
79072805 |
974 | } |
93a17b20 |
975 | return gv; |
79072805 |
976 | } |
977 | |
978 | void |
43693395 |
979 | Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
980 | { |
981 | HV *hv = GvSTASH(gv); |
982 | if (!hv) { |
983 | (void)SvOK_off(sv); |
984 | return; |
985 | } |
986 | sv_setpv(sv, prefix ? prefix : ""); |
987 | if (keepmain || strNE(HvNAME(hv), "main")) { |
988 | sv_catpv(sv,HvNAME(hv)); |
989 | sv_catpvn(sv,"::", 2); |
990 | } |
991 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
992 | } |
993 | |
994 | void |
864dbfa3 |
995 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
996 | { |
997 | HV *hv = GvSTASH(gv); |
f967eb5f |
998 | if (!hv) { |
155aba94 |
999 | (void)SvOK_off(sv); |
79072805 |
1000 | return; |
f967eb5f |
1001 | } |
1002 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
1003 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
1004 | sv_catpvn(sv,"::", 2); |
79072805 |
1005 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
1006 | } |
1007 | |
1008 | void |
43693395 |
1009 | Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
1010 | { |
1011 | GV *egv = GvEGV(gv); |
1012 | if (!egv) |
1013 | egv = gv; |
1014 | gv_fullname4(sv, egv, prefix, keepmain); |
1015 | } |
1016 | |
1017 | void |
864dbfa3 |
1018 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
1019 | { |
f967eb5f |
1020 | GV *egv = GvEGV(gv); |
748a9306 |
1021 | if (!egv) |
1022 | egv = gv; |
f6aff53a |
1023 | gv_fullname3(sv, egv, prefix); |
1024 | } |
1025 | |
1026 | /* XXX compatibility with versions <= 5.003. */ |
1027 | void |
864dbfa3 |
1028 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
1029 | { |
1030 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
1031 | } |
1032 | |
1033 | /* XXX compatibility with versions <= 5.003. */ |
1034 | void |
864dbfa3 |
1035 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
1036 | { |
1037 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
1038 | } |
1039 | |
1040 | IO * |
864dbfa3 |
1041 | Perl_newIO(pTHX) |
79072805 |
1042 | { |
1043 | IO *io; |
8990e307 |
1044 | GV *iogv; |
1045 | |
1046 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
1047 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
1048 | SvREFCNT(io) = 1; |
1049 | SvOBJECT_on(io); |
c9de509e |
1050 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d |
1051 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1052 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
c9de509e |
1053 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
1054 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
1055 | return io; |
1056 | } |
1057 | |
1058 | void |
864dbfa3 |
1059 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1060 | { |
1061 | register HE *entry; |
1062 | register I32 i; |
1063 | register GV *gv; |
463ee0b2 |
1064 | HV *hv; |
1065 | |
8990e307 |
1066 | if (!HvARRAY(stash)) |
1067 | return; |
a0d0e21e |
1068 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
1069 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
1070 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
1071 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
1072 | { |
19b6c847 |
1073 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1074 | gv_check(hv); /* nested package */ |
1075 | } |
dc437b57 |
1076 | else if (isALPHA(*HeKEY(entry))) { |
1d7c1841 |
1077 | char *file; |
dc437b57 |
1078 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1079 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1080 | continue; |
1d7c1841 |
1081 | file = GvFILE(gv); |
1082 | /* performance hack: if filename is absolute and it's a standard |
1083 | * module, don't bother warning */ |
1084 | if (file |
1085 | && PERL_FILE_IS_ABSOLUTE(file) |
6eb630b7 |
1086 | #ifdef MACOS_TRADITIONAL |
1087 | && (instr(file, ":lib:") |
1088 | #else |
1089 | && (instr(file, "/lib/") |
1090 | #endif |
1091 | || instr(file, ".pm"))) |
1d7c1841 |
1092 | { |
8990e307 |
1093 | continue; |
1d7c1841 |
1094 | } |
1095 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1096 | #ifdef USE_ITHREADS |
1097 | CopFILE(PL_curcop) = file; /* set for warning */ |
1098 | #else |
1099 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1100 | #endif |
cea2e8a9 |
1101 | Perl_warner(aTHX_ WARN_ONCE, |
599cee73 |
1102 | "Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
1103 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
1104 | } |
79072805 |
1105 | } |
1106 | } |
1107 | } |
1108 | |
1109 | GV * |
864dbfa3 |
1110 | Perl_newGVgen(pTHX_ char *pack) |
79072805 |
1111 | { |
cea2e8a9 |
1112 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1113 | TRUE, SVt_PVGV); |
79072805 |
1114 | } |
1115 | |
1116 | /* hopefully this is only called on local symbol table entries */ |
1117 | |
1118 | GP* |
864dbfa3 |
1119 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1120 | { |
1d7c1841 |
1121 | if (!gp) |
1122 | return (GP*)NULL; |
79072805 |
1123 | gp->gp_refcnt++; |
44a8e56a |
1124 | if (gp->gp_cv) { |
1125 | if (gp->gp_cvgen) { |
1126 | /* multi-named GPs cannot be used for method cache */ |
1127 | SvREFCNT_dec(gp->gp_cv); |
1128 | gp->gp_cv = Nullcv; |
1129 | gp->gp_cvgen = 0; |
1130 | } |
1131 | else { |
1132 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1133 | PL_sub_generation++; |
44a8e56a |
1134 | } |
1135 | } |
79072805 |
1136 | return gp; |
79072805 |
1137 | } |
1138 | |
1139 | void |
864dbfa3 |
1140 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1141 | { |
79072805 |
1142 | GP* gp; |
1143 | |
1144 | if (!gv || !(gp = GvGP(gv))) |
1145 | return; |
f248d071 |
1146 | if (gp->gp_refcnt == 0) { |
1147 | if (ckWARN_d(WARN_INTERNAL)) |
1148 | Perl_warner(aTHX_ WARN_INTERNAL, |
1149 | "Attempt to free unreferenced glob pointers"); |
79072805 |
1150 | return; |
1151 | } |
44a8e56a |
1152 | if (gp->gp_cv) { |
1153 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1154 | PL_sub_generation++; |
44a8e56a |
1155 | } |
748a9306 |
1156 | if (--gp->gp_refcnt > 0) { |
1157 | if (gp->gp_egv == gv) |
1158 | gp->gp_egv = 0; |
79072805 |
1159 | return; |
748a9306 |
1160 | } |
79072805 |
1161 | |
8990e307 |
1162 | SvREFCNT_dec(gp->gp_sv); |
1163 | SvREFCNT_dec(gp->gp_av); |
1164 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
1165 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
1166 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
1167 | SvREFCNT_dec(gp->gp_form); |
1168 | |
79072805 |
1169 | Safefree(gp); |
1170 | GvGP(gv) = 0; |
1171 | } |
1172 | |
1173 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
1174 | #define MICROPORT |
1175 | #endif |
1176 | |
1177 | #ifdef MICROPORT /* Microport 2.4 hack */ |
1178 | AV *GvAVn(gv) |
1179 | register GV *gv; |
1180 | { |
b267980d |
1181 | if (GvGP(gv)->gp_av) |
79072805 |
1182 | return GvGP(gv)->gp_av; |
1183 | else |
1184 | return GvGP(gv_AVadd(gv))->gp_av; |
1185 | } |
1186 | |
1187 | HV *GvHVn(gv) |
1188 | register GV *gv; |
1189 | { |
1190 | if (GvGP(gv)->gp_hv) |
1191 | return GvGP(gv)->gp_hv; |
1192 | else |
1193 | return GvGP(gv_HVadd(gv))->gp_hv; |
1194 | } |
1195 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
1196 | |
d460ef45 |
1197 | int |
1198 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) |
1199 | { |
1200 | AMT *amtp = (AMT*)mg->mg_ptr; |
1201 | if (amtp && AMT_AMAGIC(amtp)) { |
1202 | int i; |
1203 | for (i = 1; i < NofAMmeth; i++) { |
1204 | CV *cv = amtp->table[i]; |
1205 | if (cv != Nullcv) { |
1206 | SvREFCNT_dec((SV *) cv); |
1207 | amtp->table[i] = Nullcv; |
1208 | } |
1209 | } |
1210 | } |
1211 | return 0; |
1212 | } |
1213 | |
a0d0e21e |
1214 | /* Updates and caches the CV's */ |
1215 | |
1216 | bool |
864dbfa3 |
1217 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1218 | { |
a0d0e21e |
1219 | GV* gv; |
1220 | CV* cv; |
14befaf4 |
1221 | MAGIC* mg=mg_find((SV*)stash, PERL_MAGIC_overload_table); |
8ac85365 |
1222 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1223 | AMT amt; |
2d8e6c8d |
1224 | STRLEN n_a; |
a0d0e21e |
1225 | |
3280af22 |
1226 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1227 | && amtp->was_ok_sub == PL_sub_generation) |
32251b26 |
1228 | return AMT_OVERLOADED(amtp); |
14befaf4 |
1229 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e |
1230 | |
cea2e8a9 |
1231 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
a0d0e21e |
1232 | |
d460ef45 |
1233 | Zero(&amt,1,AMT); |
3280af22 |
1234 | amt.was_ok_am = PL_amagic_generation; |
1235 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1236 | amt.fallback = AMGfallNO; |
1237 | amt.flags = 0; |
1238 | |
a6006777 |
1239 | { |
32251b26 |
1240 | int filled = 0, have_ovl = 0; |
1241 | int i, lim = 1; |
a6006777 |
1242 | SV* sv = NULL; |
a6006777 |
1243 | |
22c35a8c |
1244 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1245 | |
89ffc314 |
1246 | /* Try to find via inheritance. */ |
1247 | gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); |
1248 | if (gv) |
1249 | sv = GvSV(gv); |
1250 | |
1251 | if (!gv) |
32251b26 |
1252 | lim = DESTROY_amg; /* Skip overloading entries. */ |
89ffc314 |
1253 | else if (SvTRUE(sv)) |
1254 | amt.fallback=AMGfallYES; |
1255 | else if (SvOK(sv)) |
1256 | amt.fallback=AMGfallNEVER; |
a6006777 |
1257 | |
32251b26 |
1258 | for (i = 1; i < lim; i++) |
1259 | amt.table[i] = Nullcv; |
1260 | for (; i < NofAMmeth; i++) { |
c8ce92fc |
1261 | char *cooky = (char*)PL_AMG_names[i]; |
32251b26 |
1262 | /* Human-readable form, for debugging: */ |
1263 | char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
89ffc314 |
1264 | STRLEN l = strlen(cooky); |
1265 | |
cea2e8a9 |
1266 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
44a8e56a |
1267 | cp, HvNAME(stash)) ); |
46fc3d4c |
1268 | /* don't fill the cache while looking up! */ |
89ffc314 |
1269 | gv = gv_fetchmeth(stash, cooky, l, -1); |
46fc3d4c |
1270 | cv = 0; |
89ffc314 |
1271 | if (gv && (cv = GvCV(gv))) { |
44a8e56a |
1272 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1273 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1274 | /* GvSV contains the name of the method. */ |
1275 | GV *ngv; |
1276 | |
b267980d |
1277 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
2d8e6c8d |
1278 | SvPV(GvSV(gv), n_a), cp, HvNAME(stash)) ); |
b267980d |
1279 | if (!SvPOK(GvSV(gv)) |
dc848c6f |
1280 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1281 | FALSE))) |
1282 | { |
44a8e56a |
1283 | /* Can be an import stub (created by `can'). */ |
1284 | if (GvCVGEN(gv)) { |
b267980d |
1285 | Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1286 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1287 | cp, HvNAME(stash)); |
1288 | } else |
b267980d |
1289 | Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1290 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1291 | cp, HvNAME(stash)); |
1292 | } |
dc848c6f |
1293 | cv = GvCV(gv = ngv); |
44a8e56a |
1294 | } |
cea2e8a9 |
1295 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
44a8e56a |
1296 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1297 | GvNAME(CvGV(cv))) ); |
1298 | filled = 1; |
32251b26 |
1299 | if (i < DESTROY_amg) |
1300 | have_ovl = 1; |
44a8e56a |
1301 | } |
a6006777 |
1302 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1303 | } |
a0d0e21e |
1304 | if (filled) { |
a6006777 |
1305 | AMT_AMAGIC_on(&amt); |
32251b26 |
1306 | if (have_ovl) |
1307 | AMT_OVERLOADED_on(&amt); |
14befaf4 |
1308 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1309 | (char*)&amt, sizeof(AMT)); |
32251b26 |
1310 | return have_ovl; |
a0d0e21e |
1311 | } |
1312 | } |
a6006777 |
1313 | /* Here we have no table: */ |
9cbac4c7 |
1314 | /* no_table: */ |
a6006777 |
1315 | AMT_AMAGIC_off(&amt); |
14befaf4 |
1316 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1317 | (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1318 | return FALSE; |
1319 | } |
1320 | |
32251b26 |
1321 | |
1322 | CV* |
1323 | Perl_gv_handler(pTHX_ HV *stash, I32 id) |
1324 | { |
3f8f4626 |
1325 | MAGIC *mg; |
32251b26 |
1326 | AMT *amtp; |
1327 | |
3f8f4626 |
1328 | if (!stash) |
1329 | return Nullcv; |
14befaf4 |
1330 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1331 | if (!mg) { |
1332 | do_update: |
1333 | Gv_AMupdate(stash); |
14befaf4 |
1334 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 |
1335 | } |
1336 | amtp = (AMT*)mg->mg_ptr; |
1337 | if ( amtp->was_ok_am != PL_amagic_generation |
1338 | || amtp->was_ok_sub != PL_sub_generation ) |
1339 | goto do_update; |
1340 | if (AMT_AMAGIC(amtp)) |
1341 | return amtp->table[id]; |
1342 | return Nullcv; |
1343 | } |
1344 | |
1345 | |
a0d0e21e |
1346 | SV* |
864dbfa3 |
1347 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1348 | { |
b267980d |
1349 | MAGIC *mg; |
1350 | CV *cv; |
a0d0e21e |
1351 | CV **cvp=NULL, **ocvp=NULL; |
1352 | AMT *amtp, *oamtp; |
1353 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
ee239bfe |
1354 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
a0d0e21e |
1355 | HV* stash; |
1356 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
14befaf4 |
1357 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))), |
1358 | PERL_MAGIC_overload_table)) |
b267980d |
1359 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1360 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1361 | : (CV **) NULL)) |
b267980d |
1362 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1363 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1364 | * usual method */ |
1365 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1366 | lr = -1; /* Call method for left argument */ |
1367 | } else { |
1368 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1369 | int logic; |
1370 | |
1371 | /* look for substituted methods */ |
ee239bfe |
1372 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1373 | switch (method) { |
1374 | case inc_amg: |
ee239bfe |
1375 | force_cpy = 1; |
1376 | if ((cv = cvp[off=add_ass_amg]) |
1377 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1378 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1379 | } |
1380 | break; |
1381 | case dec_amg: |
ee239bfe |
1382 | force_cpy = 1; |
1383 | if ((cv = cvp[off = subtr_ass_amg]) |
1384 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1385 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1386 | } |
1387 | break; |
1388 | case bool__amg: |
1389 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1390 | break; |
1391 | case numer_amg: |
1392 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1393 | break; |
1394 | case string_amg: |
1395 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1396 | break; |
dc437b57 |
1397 | case not_amg: |
b267980d |
1398 | (void)((cv = cvp[off=bool__amg]) |
dc437b57 |
1399 | || (cv = cvp[off=numer_amg]) |
1400 | || (cv = cvp[off=string_amg])); |
1401 | postpr = 1; |
1402 | break; |
748a9306 |
1403 | case copy_amg: |
1404 | { |
76e3520e |
1405 | /* |
1406 | * SV* ref causes confusion with the interpreter variable of |
1407 | * the same name |
1408 | */ |
1409 | SV* tmpRef=SvRV(left); |
1410 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1411 | /* |
1412 | * Just to be extra cautious. Maybe in some |
1413 | * additional cases sv_setsv is safe, too. |
1414 | */ |
76e3520e |
1415 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1416 | SvOBJECT_on(newref); |
76e3520e |
1417 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1418 | return newref; |
1419 | } |
1420 | } |
1421 | break; |
a0d0e21e |
1422 | case abs_amg: |
b267980d |
1423 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1424 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1425 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1426 | if (off1==lt_amg) { |
748a9306 |
1427 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1428 | lt_amg,AMGf_noright); |
1429 | logic = SvTRUE(lessp); |
1430 | } else { |
748a9306 |
1431 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1432 | ncmp_amg,AMGf_noright); |
1433 | logic = (SvNV(lessp) < 0); |
1434 | } |
1435 | if (logic) { |
1436 | if (off==subtr_amg) { |
1437 | right = left; |
748a9306 |
1438 | left = nullsv; |
a0d0e21e |
1439 | lr = 1; |
1440 | } |
1441 | } else { |
1442 | return left; |
1443 | } |
1444 | } |
1445 | break; |
1446 | case neg_amg: |
155aba94 |
1447 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1448 | right = left; |
1449 | left = sv_2mortal(newSViv(0)); |
1450 | lr = 1; |
1451 | } |
1452 | break; |
f216259d |
1453 | case int_amg: |
f5284f61 |
1454 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1455 | /* FAIL safe */ |
1456 | return NULL; /* Delegate operation to standard mechanisms. */ |
1457 | break; |
f5284f61 |
1458 | case to_sv_amg: |
1459 | case to_av_amg: |
1460 | case to_hv_amg: |
1461 | case to_gv_amg: |
1462 | case to_cv_amg: |
1463 | /* FAIL safe */ |
b267980d |
1464 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1465 | break; |
a0d0e21e |
1466 | default: |
1467 | goto not_found; |
1468 | } |
1469 | if (!cv) goto not_found; |
1470 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
14befaf4 |
1471 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))), |
1472 | PERL_MAGIC_overload_table)) |
b267980d |
1473 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1474 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1475 | : (CV **) NULL)) |
a0d0e21e |
1476 | && (cv = cvp[off=method])) { /* Method for right |
1477 | * argument found */ |
1478 | lr=1; |
b267980d |
1479 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1480 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1481 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1482 | && !(flags & AMGf_unary)) { |
1483 | /* We look for substitution for |
1484 | * comparison operations and |
fc36a67e |
1485 | * concatenation */ |
a0d0e21e |
1486 | if (method==concat_amg || method==concat_ass_amg |
1487 | || method==repeat_amg || method==repeat_ass_amg) { |
1488 | return NULL; /* Delegate operation to string conversion */ |
1489 | } |
1490 | off = -1; |
1491 | switch (method) { |
1492 | case lt_amg: |
1493 | case le_amg: |
1494 | case gt_amg: |
1495 | case ge_amg: |
1496 | case eq_amg: |
1497 | case ne_amg: |
1498 | postpr = 1; off=ncmp_amg; break; |
1499 | case slt_amg: |
1500 | case sle_amg: |
1501 | case sgt_amg: |
1502 | case sge_amg: |
1503 | case seq_amg: |
1504 | case sne_amg: |
1505 | postpr = 1; off=scmp_amg; break; |
1506 | } |
1507 | if (off != -1) cv = cvp[off]; |
1508 | if (!cv) { |
1509 | goto not_found; |
1510 | } |
1511 | } else { |
a6006777 |
1512 | not_found: /* No method found, either report or croak */ |
b267980d |
1513 | switch (method) { |
1514 | case to_sv_amg: |
1515 | case to_av_amg: |
1516 | case to_hv_amg: |
1517 | case to_gv_amg: |
1518 | case to_cv_amg: |
1519 | /* FAIL safe */ |
1520 | return left; /* Delegate operation to standard mechanisms. */ |
1521 | break; |
1522 | } |
a0d0e21e |
1523 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1524 | notfound = 1; lr = -1; |
1525 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1526 | notfound = 1; lr = 1; |
1527 | } else { |
46fc3d4c |
1528 | SV *msg; |
774d564b |
1529 | if (off==-1) off=method; |
b267980d |
1530 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
46fc3d4c |
1531 | "Operation `%s': no method found,%sargument %s%s%s%s", |
89ffc314 |
1532 | AMG_id2name(method + assignshift), |
e7ea3e70 |
1533 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1534 | SvAMAGIC(left)? |
a0d0e21e |
1535 | "in overloaded package ": |
1536 | "has no overloaded magic", |
b267980d |
1537 | SvAMAGIC(left)? |
a0d0e21e |
1538 | HvNAME(SvSTASH(SvRV(left))): |
1539 | "", |
b267980d |
1540 | SvAMAGIC(right)? |
e7ea3e70 |
1541 | ",\n\tright argument in overloaded package ": |
b267980d |
1542 | (flags & AMGf_unary |
e7ea3e70 |
1543 | ? "" |
1544 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1545 | SvAMAGIC(right)? |
a0d0e21e |
1546 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1547 | "")); |
a0d0e21e |
1548 | if (amtp && amtp->fallback >= AMGfallYES) { |
cea2e8a9 |
1549 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
a0d0e21e |
1550 | } else { |
894356b3 |
1551 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1552 | } |
1553 | return NULL; |
1554 | } |
ee239bfe |
1555 | force_cpy = force_cpy || assign; |
a0d0e21e |
1556 | } |
1557 | } |
1558 | if (!notfound) { |
b267980d |
1559 | DEBUG_o( Perl_deb(aTHX_ |
46fc3d4c |
1560 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
89ffc314 |
1561 | AMG_id2name(off), |
748a9306 |
1562 | method+assignshift==off? "" : |
1563 | " (initially `", |
1564 | method+assignshift==off? "" : |
89ffc314 |
1565 | AMG_id2name(method+assignshift), |
748a9306 |
1566 | method+assignshift==off? "" : "')", |
1567 | flags & AMGf_unary? "" : |
1568 | lr==1 ? " for right argument": " for left argument", |
1569 | flags & AMGf_unary? " for argument" : "", |
b267980d |
1570 | HvNAME(stash), |
a0d0e21e |
1571 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1572 | } |
748a9306 |
1573 | /* Since we use shallow copy during assignment, we need |
1574 | * to dublicate the contents, probably calling user-supplied |
1575 | * version of copy operator |
1576 | */ |
ee239bfe |
1577 | /* We need to copy in following cases: |
1578 | * a) Assignment form was called. |
1579 | * assignshift==1, assign==T, method + 1 == off |
1580 | * b) Increment or decrement, called directly. |
1581 | * assignshift==0, assign==0, method + 0 == off |
1582 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1583 | * assignshift==0, assign==T, |
ee239bfe |
1584 | * force_cpy == T |
1585 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1586 | * assignshift==0, assign==0, |
ee239bfe |
1587 | * force_cpy == T |
1588 | * e) Assignment form translated to nomethod. |
1589 | * assignshift==1, assign==T, method + 1 != off |
1590 | * force_cpy == T |
1591 | */ |
1592 | /* off is method, method+assignshift, or a result of opcode substitution. |
1593 | * In the latter case assignshift==0, so only notfound case is important. |
1594 | */ |
1595 | if (( (method + assignshift == off) |
1596 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1597 | || force_cpy) |
1598 | RvDEEPCP(left); |
a0d0e21e |
1599 | { |
1600 | dSP; |
1601 | BINOP myop; |
1602 | SV* res; |
54310121 |
1603 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1604 | |
54310121 |
1605 | CATCH_SET(TRUE); |
a0d0e21e |
1606 | Zero(&myop, 1, BINOP); |
1607 | myop.op_last = (OP *) &myop; |
1608 | myop.op_next = Nullop; |
54310121 |
1609 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1610 | |
e788e7d3 |
1611 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1612 | ENTER; |
462e5cf6 |
1613 | SAVEOP(); |
533c011a |
1614 | PL_op = (OP *) &myop; |
3280af22 |
1615 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1616 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1617 | PUTBACK; |
cea2e8a9 |
1618 | pp_pushmark(); |
a0d0e21e |
1619 | |
924508f0 |
1620 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1621 | PUSHs(lr>0? right: left); |
1622 | PUSHs(lr>0? left: right); |
3280af22 |
1623 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1624 | if (notfound) { |
89ffc314 |
1625 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e |
1626 | } |
1627 | PUSHs((SV*)cv); |
1628 | PUTBACK; |
1629 | |
155aba94 |
1630 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1631 | CALLRUNOPS(aTHX); |
a0d0e21e |
1632 | LEAVE; |
1633 | SPAGAIN; |
1634 | |
1635 | res=POPs; |
ebafeae7 |
1636 | PUTBACK; |
d3acc0f7 |
1637 | POPSTACK; |
54310121 |
1638 | CATCH_SET(oldcatch); |
a0d0e21e |
1639 | |
a0d0e21e |
1640 | if (postpr) { |
1641 | int ans; |
1642 | switch (method) { |
1643 | case le_amg: |
1644 | case sle_amg: |
1645 | ans=SvIV(res)<=0; break; |
1646 | case lt_amg: |
1647 | case slt_amg: |
1648 | ans=SvIV(res)<0; break; |
1649 | case ge_amg: |
1650 | case sge_amg: |
1651 | ans=SvIV(res)>=0; break; |
1652 | case gt_amg: |
1653 | case sgt_amg: |
1654 | ans=SvIV(res)>0; break; |
1655 | case eq_amg: |
1656 | case seq_amg: |
1657 | ans=SvIV(res)==0; break; |
1658 | case ne_amg: |
1659 | case sne_amg: |
1660 | ans=SvIV(res)!=0; break; |
1661 | case inc_amg: |
1662 | case dec_amg: |
bbce6d69 |
1663 | SvSetSV(left,res); return left; |
dc437b57 |
1664 | case not_amg: |
fe7ac86a |
1665 | ans=!SvTRUE(res); break; |
a0d0e21e |
1666 | } |
54310121 |
1667 | return boolSV(ans); |
748a9306 |
1668 | } else if (method==copy_amg) { |
1669 | if (!SvROK(res)) { |
cea2e8a9 |
1670 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1671 | } |
1672 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1673 | } else { |
1674 | return res; |
1675 | } |
1676 | } |
1677 | } |
c9d5ac95 |
1678 | |
1679 | /* |
1680 | =for apidoc is_gv_magical |
1681 | |
1682 | Returns C<TRUE> if given the name of a magical GV. |
1683 | |
1684 | Currently only useful internally when determining if a GV should be |
1685 | created even in rvalue contexts. |
1686 | |
1687 | C<flags> is not used at present but available for future extension to |
1688 | allow selecting particular classes of magical variable. |
1689 | |
1690 | =cut |
1691 | */ |
1692 | bool |
1693 | Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) |
1694 | { |
1695 | if (!len) |
1696 | return FALSE; |
1697 | |
1698 | switch (*name) { |
1699 | case 'I': |
1700 | if (len == 3 && strEQ(name, "ISA")) |
1701 | goto yes; |
1702 | break; |
1703 | case 'O': |
1704 | if (len == 8 && strEQ(name, "OVERLOAD")) |
1705 | goto yes; |
1706 | break; |
1707 | case 'S': |
1708 | if (len == 3 && strEQ(name, "SIG")) |
1709 | goto yes; |
1710 | break; |
ac27b0f5 |
1711 | case '\017': /* $^O & $^OPEN */ |
1712 | if (len == 1 |
1713 | || (len == 4 && strEQ(name, "\027PEN"))) |
1714 | { |
1715 | goto yes; |
1716 | } |
1717 | break; |
c9d5ac95 |
1718 | case '\027': /* $^W & $^WARNING_BITS */ |
1719 | if (len == 1 |
1720 | || (len == 12 && strEQ(name, "\027ARNING_BITS")) |
1721 | || (len == 17 && strEQ(name, "\027IDE_SYSTEM_CALLS"))) |
1722 | { |
1723 | goto yes; |
1724 | } |
1725 | break; |
1726 | |
1727 | case '&': |
1728 | case '`': |
1729 | case '\'': |
1730 | case ':': |
1731 | case '?': |
1732 | case '!': |
1733 | case '-': |
1734 | case '#': |
1735 | case '*': |
1736 | case '[': |
1737 | case '^': |
1738 | case '~': |
1739 | case '=': |
1740 | case '%': |
1741 | case '.': |
1742 | case '(': |
1743 | case ')': |
1744 | case '<': |
1745 | case '>': |
1746 | case ',': |
1747 | case '\\': |
1748 | case '/': |
1749 | case '|': |
1750 | case '+': |
1751 | case ';': |
1752 | case ']': |
1753 | case '\001': /* $^A */ |
1754 | case '\003': /* $^C */ |
1755 | case '\004': /* $^D */ |
1756 | case '\005': /* $^E */ |
1757 | case '\006': /* $^F */ |
1758 | case '\010': /* $^H */ |
1759 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1760 | case '\014': /* $^L */ |
c9d5ac95 |
1761 | case '\020': /* $^P */ |
1762 | case '\023': /* $^S */ |
1763 | case '\024': /* $^T */ |
1764 | case '\026': /* $^V */ |
1765 | if (len == 1) |
1766 | goto yes; |
1767 | break; |
1768 | case '1': |
1769 | case '2': |
1770 | case '3': |
1771 | case '4': |
1772 | case '5': |
1773 | case '6': |
1774 | case '7': |
1775 | case '8': |
1776 | case '9': |
1777 | if (len > 1) { |
1778 | char *end = name + len; |
1779 | while (--end > name) { |
1780 | if (!isDIGIT(*end)) |
1781 | return FALSE; |
1782 | } |
1783 | } |
1784 | yes: |
1785 | return TRUE; |
1786 | default: |
1787 | break; |
1788 | } |
1789 | return FALSE; |
1790 | } |