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) |
fd345fa8 |
78 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, 'L'); |
1d7c1841 |
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; |
6662521e |
109 | sv_magic((SV*)gv, (SV*)gv, '*', Nullch, 0); |
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 |
b267980d |
162 | accessible via @ISA and @UNIVERSAL. |
954c1994 |
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 |
b267980d |
167 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 |
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 |
b267980d |
173 | obtained from the GV with the C<GvCV> macro. |
954c1994 |
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 |
b267980d |
320 | already setup. |
954c1994 |
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 |
b267980d |
324 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 |
325 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d |
326 | with a non-zero C<autoload> parameter. |
954c1994 |
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 |
b267980d |
332 | created via a side effect to do this. |
954c1994 |
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 |
b267980d |
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; |
b267980d |
349 | |
463ee0b2 |
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) { |
2f6e0fe7 |
375 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
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 | |
ed850460 |
421 | if (!CvROOT(cv)) |
422 | return Nullgv; |
423 | |
dc848c6f |
424 | /* |
425 | * Inheriting AUTOLOAD for non-methods works ... for now. |
426 | */ |
b267980d |
427 | if (ckWARN(WARN_DEPRECATED) && !method && |
599cee73 |
428 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
cea2e8a9 |
429 | Perl_warner(aTHX_ WARN_DEPRECATED, |
dc848c6f |
430 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
431 | HvNAME(stash), (int)len, name); |
44a8e56a |
432 | |
433 | /* |
434 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
435 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
436 | * use that, but for lack of anything better we will use the sub's |
437 | * original package to look up $AUTOLOAD. |
438 | */ |
439 | varstash = GvSTASH(CvGV(cv)); |
440 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
3d35f11b |
441 | ENTER; |
442 | |
443 | #ifdef USE_THREADS |
4755096e |
444 | sv_lock((SV *)varstash); |
3d35f11b |
445 | #endif |
44a8e56a |
446 | if (!isGV(vargv)) |
447 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
3d35f11b |
448 | LEAVE; |
44a8e56a |
449 | varsv = GvSV(vargv); |
3d35f11b |
450 | #ifdef USE_THREADS |
4755096e |
451 | sv_lock(varsv); |
3d35f11b |
452 | #endif |
44a8e56a |
453 | sv_setpv(varsv, HvNAME(stash)); |
454 | sv_catpvn(varsv, "::", 2); |
455 | sv_catpvn(varsv, name, len); |
456 | SvTAINTED_off(varsv); |
a0d0e21e |
457 | return gv; |
458 | } |
459 | |
954c1994 |
460 | /* |
461 | =for apidoc gv_stashpv |
462 | |
386d01d6 |
463 | Returns a pointer to the stash for a specified package. C<name> should |
464 | be a valid UTF-8 string. If C<create> is set then the package will be |
465 | created if it does not already exist. If C<create> is not set and the |
466 | package does not exist then NULL is returned. |
954c1994 |
467 | |
468 | =cut |
469 | */ |
470 | |
a0d0e21e |
471 | HV* |
864dbfa3 |
472 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e |
473 | { |
dc437b57 |
474 | return gv_stashpvn(name, strlen(name), create); |
475 | } |
476 | |
477 | HV* |
864dbfa3 |
478 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 |
479 | { |
46fc3d4c |
480 | char smallbuf[256]; |
481 | char *tmpbuf; |
a0d0e21e |
482 | HV *stash; |
483 | GV *tmpgv; |
dc437b57 |
484 | |
46fc3d4c |
485 | if (namelen + 3 < sizeof smallbuf) |
486 | tmpbuf = smallbuf; |
487 | else |
488 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
489 | Copy(name,tmpbuf,namelen,char); |
490 | tmpbuf[namelen++] = ':'; |
491 | tmpbuf[namelen++] = ':'; |
492 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
493 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
494 | if (tmpbuf != smallbuf) |
495 | Safefree(tmpbuf); |
a0d0e21e |
496 | if (!tmpgv) |
497 | return 0; |
498 | if (!GvHV(tmpgv)) |
499 | GvHV(tmpgv) = newHV(); |
500 | stash = GvHV(tmpgv); |
501 | if (!HvNAME(stash)) |
502 | HvNAME(stash) = savepv(name); |
503 | return stash; |
463ee0b2 |
504 | } |
505 | |
954c1994 |
506 | /* |
507 | =for apidoc gv_stashsv |
508 | |
386d01d6 |
509 | Returns a pointer to the stash for a specified package, which must be a |
510 | valid UTF-8 string. See C<gv_stashpv>. |
954c1994 |
511 | |
512 | =cut |
513 | */ |
514 | |
a0d0e21e |
515 | HV* |
864dbfa3 |
516 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e |
517 | { |
dc437b57 |
518 | register char *ptr; |
519 | STRLEN len; |
520 | ptr = SvPV(sv,len); |
521 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
522 | } |
523 | |
524 | |
463ee0b2 |
525 | GV * |
864dbfa3 |
526 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
79072805 |
527 | { |
11343788 |
528 | dTHR; |
08105a92 |
529 | register const char *name = nambeg; |
463ee0b2 |
530 | register GV *gv = 0; |
79072805 |
531 | GV**gvp; |
79072805 |
532 | I32 len; |
08105a92 |
533 | register const char *namend; |
463ee0b2 |
534 | HV *stash = 0; |
79072805 |
535 | |
c07a80fd |
536 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
537 | name++; |
538 | |
79072805 |
539 | for (namend = name; *namend; namend++) { |
1d7c1841 |
540 | if ((*namend == ':' && namend[1] == ':') |
541 | || (*namend == '\'' && namend[1])) |
463ee0b2 |
542 | { |
463ee0b2 |
543 | if (!stash) |
3280af22 |
544 | stash = PL_defstash; |
dc437b57 |
545 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
546 | return Nullgv; |
463ee0b2 |
547 | |
85e6fe83 |
548 | len = namend - name; |
549 | if (len > 0) { |
3c78fafa |
550 | char smallbuf[256]; |
62b57502 |
551 | char *tmpbuf; |
62b57502 |
552 | |
3c78fafa |
553 | if (len + 3 < sizeof smallbuf) |
554 | tmpbuf = smallbuf; |
62b57502 |
555 | else |
556 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
557 | Copy(name, tmpbuf, len, char); |
558 | tmpbuf[len++] = ':'; |
559 | tmpbuf[len++] = ':'; |
560 | tmpbuf[len] = '\0'; |
463ee0b2 |
561 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
562 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
563 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
564 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
565 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
566 | else |
567 | GvMULTI_on(gv); |
568 | } |
3c78fafa |
569 | if (tmpbuf != smallbuf) |
62b57502 |
570 | Safefree(tmpbuf); |
3280af22 |
571 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
572 | return Nullgv; |
85e6fe83 |
573 | |
463ee0b2 |
574 | if (!(stash = GvHV(gv))) |
575 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
576 | |
463ee0b2 |
577 | if (!HvNAME(stash)) |
a0d0e21e |
578 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
579 | } |
580 | |
581 | if (*namend == ':') |
582 | namend++; |
583 | namend++; |
584 | name = namend; |
585 | if (!*name) |
3280af22 |
586 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
587 | } |
79072805 |
588 | } |
a0d0e21e |
589 | len = namend - name; |
590 | if (!len) |
591 | len = 1; |
463ee0b2 |
592 | |
593 | /* No stash in name, so see how we can default */ |
594 | |
595 | if (!stash) { |
7e2040f0 |
596 | if (isIDFIRST_lazy(name)) { |
9607fc9c |
597 | bool global = FALSE; |
598 | |
463ee0b2 |
599 | if (isUPPER(*name)) { |
9d116dd7 |
600 | if (*name == 'S' && ( |
601 | strEQ(name, "SIG") || |
602 | strEQ(name, "STDIN") || |
603 | strEQ(name, "STDOUT") || |
604 | strEQ(name, "STDERR"))) |
605 | global = TRUE; |
606 | else if (*name == 'I' && strEQ(name, "INC")) |
607 | global = TRUE; |
608 | else if (*name == 'E' && strEQ(name, "ENV")) |
609 | global = TRUE; |
463ee0b2 |
610 | else if (*name == 'A' && ( |
611 | strEQ(name, "ARGV") || |
9d116dd7 |
612 | strEQ(name, "ARGVOUT"))) |
463ee0b2 |
613 | global = TRUE; |
614 | } |
615 | else if (*name == '_' && !name[1]) |
616 | global = TRUE; |
9607fc9c |
617 | |
463ee0b2 |
618 | if (global) |
3280af22 |
619 | stash = PL_defstash; |
620 | else if ((COP*)PL_curcop == &PL_compiling) { |
621 | stash = PL_curstash; |
622 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
623 | sv_type != SVt_PVCV && |
624 | sv_type != SVt_PVGV && |
4633a7c4 |
625 | sv_type != SVt_PVFM && |
c07a80fd |
626 | sv_type != SVt_PVIO && |
377b8fbc |
627 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
628 | { |
4633a7c4 |
629 | gvp = (GV**)hv_fetch(stash,name,len,0); |
630 | if (!gvp || |
3280af22 |
631 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
632 | SvTYPE(*gvp) != SVt_PVGV) |
633 | { |
4633a7c4 |
634 | stash = 0; |
a5f75d66 |
635 | } |
155aba94 |
636 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
637 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
638 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
4633a7c4 |
639 | { |
cea2e8a9 |
640 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 |
641 | sv_type == SVt_PVAV ? '@' : |
642 | sv_type == SVt_PVHV ? '%' : '$', |
643 | name); |
8ebc5c01 |
644 | if (GvCVu(*gvp)) |
cc507455 |
645 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e |
646 | stash = 0; |
4633a7c4 |
647 | } |
a0d0e21e |
648 | } |
85e6fe83 |
649 | } |
463ee0b2 |
650 | else |
1d7c1841 |
651 | stash = CopSTASH(PL_curcop); |
463ee0b2 |
652 | } |
653 | else |
3280af22 |
654 | stash = PL_defstash; |
463ee0b2 |
655 | } |
656 | |
657 | /* By this point we should have a stash and a name */ |
658 | |
a0d0e21e |
659 | if (!stash) { |
5a844595 |
660 | if (add) { |
661 | qerror(Perl_mess(aTHX_ |
662 | "Global symbol \"%s%s\" requires explicit package name", |
663 | (sv_type == SVt_PV ? "$" |
664 | : sv_type == SVt_PVAV ? "@" |
665 | : sv_type == SVt_PVHV ? "%" |
666 | : ""), name)); |
f180df80 |
667 | stash = PL_nullstash; |
a0d0e21e |
668 | } |
f180df80 |
669 | else |
670 | return Nullgv; |
a0d0e21e |
671 | } |
672 | |
673 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
674 | return Nullgv; |
675 | |
79072805 |
676 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
677 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
678 | return Nullgv; |
679 | gv = *gvp; |
680 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
681 | if (add) { |
a5f75d66 |
682 | GvMULTI_on(gv); |
a0d0e21e |
683 | gv_init_sv(gv, sv_type); |
684 | } |
79072805 |
685 | return gv; |
55d729e4 |
686 | } else if (add & GV_NOINIT) { |
687 | return gv; |
79072805 |
688 | } |
93a17b20 |
689 | |
690 | /* Adding a new symbol */ |
691 | |
0453d815 |
692 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
693 | Perl_warner(aTHX_ WARN_INTERNAL, "Had to create %s unexpectedly", nambeg); |
55d729e4 |
694 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
695 | gv_init_sv(gv, sv_type); |
93a17b20 |
696 | |
0453d815 |
697 | if (isLEXWARN_on && isALPHA(name[0]) && ! ckWARN(WARN_ONCE)) |
698 | GvMULTI_on(gv) ; |
699 | |
93a17b20 |
700 | /* set up magic where warranted */ |
701 | switch (*name) { |
a0d0e21e |
702 | case 'A': |
703 | if (strEQ(name, "ARGV")) { |
704 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
705 | } |
706 | break; |
a0d0e21e |
707 | case 'E': |
708 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
709 | GvMULTI_on(gv); |
a0d0e21e |
710 | break; |
463ee0b2 |
711 | case 'I': |
712 | if (strEQ(name, "ISA")) { |
713 | AV* av = GvAVn(gv); |
a5f75d66 |
714 | GvMULTI_on(gv); |
a0d0e21e |
715 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
93965878 |
716 | /* NOTE: No support for tied ISA */ |
55d729e4 |
717 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
718 | && AvFILLp(av) == -1) |
85e6fe83 |
719 | { |
a0d0e21e |
720 | char *pname; |
79cb57f6 |
721 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
dc437b57 |
722 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
723 | av_push(av, newSVpvn(pname = "DB_File",7)); |
dc437b57 |
724 | gv_stashpvn(pname, 7, TRUE); |
79cb57f6 |
725 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
dc437b57 |
726 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
727 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
dc437b57 |
728 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 |
729 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
dc437b57 |
730 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
731 | } |
463ee0b2 |
732 | } |
733 | break; |
a0d0e21e |
734 | case 'O': |
735 | if (strEQ(name, "OVERLOAD")) { |
736 | HV* hv = GvHVn(gv); |
a5f75d66 |
737 | GvMULTI_on(gv); |
fd345fa8 |
738 | hv_magic(hv, Nullgv, 'A'); |
a0d0e21e |
739 | } |
740 | break; |
93a17b20 |
741 | case 'S': |
742 | if (strEQ(name, "SIG")) { |
743 | HV *hv; |
dc437b57 |
744 | I32 i; |
1d7c1841 |
745 | if (!PL_psig_ptr) { |
746 | int sig_num[] = { SIG_NUM }; |
747 | New(73, PL_psig_ptr, sizeof(sig_num)/sizeof(*sig_num), SV*); |
748 | New(73, PL_psig_name, sizeof(sig_num)/sizeof(*sig_num), SV*); |
749 | } |
750 | GvMULTI_on(gv); |
751 | hv = GvHVn(gv); |
fd345fa8 |
752 | hv_magic(hv, Nullgv, 'S'); |
1d7c1841 |
753 | for (i = 1; PL_sig_name[i]; i++) { |
dc437b57 |
754 | SV ** init; |
1d7c1841 |
755 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
756 | if (init) |
757 | sv_setsv(*init, &PL_sv_undef); |
22c35a8c |
758 | PL_psig_ptr[i] = 0; |
759 | PL_psig_name[i] = 0; |
dc437b57 |
760 | } |
93a17b20 |
761 | } |
762 | break; |
09bef843 |
763 | case 'V': |
764 | if (strEQ(name, "VERSION")) |
765 | GvMULTI_on(gv); |
766 | break; |
93a17b20 |
767 | |
768 | case '&': |
463ee0b2 |
769 | if (len > 1) |
770 | break; |
3280af22 |
771 | PL_sawampersand = TRUE; |
a0d0e21e |
772 | goto ro_magicalize; |
93a17b20 |
773 | |
774 | case '`': |
463ee0b2 |
775 | if (len > 1) |
776 | break; |
3280af22 |
777 | PL_sawampersand = TRUE; |
a0d0e21e |
778 | goto ro_magicalize; |
93a17b20 |
779 | |
780 | case '\'': |
463ee0b2 |
781 | if (len > 1) |
782 | break; |
3280af22 |
783 | PL_sawampersand = TRUE; |
a0d0e21e |
784 | goto ro_magicalize; |
93a17b20 |
785 | |
786 | case ':': |
463ee0b2 |
787 | if (len > 1) |
788 | break; |
3280af22 |
789 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 |
790 | goto magicalize; |
791 | |
ff0cee69 |
792 | case '?': |
793 | if (len > 1) |
794 | break; |
795 | #ifdef COMPLEX_STATUS |
07f14f54 |
796 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
ff0cee69 |
797 | #endif |
798 | goto magicalize; |
799 | |
067391ea |
800 | case '!': |
4318d5a0 |
801 | if (len > 1) |
067391ea |
802 | break; |
3280af22 |
803 | if (sv_type > SVt_PV && PL_curcop != &PL_compiling) { |
067391ea |
804 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
265f5c4a |
805 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
067391ea |
806 | dSP; |
807 | PUTBACK; |
cea2e8a9 |
808 | require_pv("Errno.pm"); |
067391ea |
809 | SPAGAIN; |
810 | stash = gv_stashpvn("Errno",5,FALSE); |
811 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
cea2e8a9 |
812 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
067391ea |
813 | } |
814 | } |
815 | goto magicalize; |
6cef1e77 |
816 | case '-': |
817 | if (len > 1) |
818 | break; |
819 | else { |
820 | AV* av = GvAVn(gv); |
821 | sv_magic((SV*)av, Nullsv, 'D', Nullch, 0); |
03a27ae7 |
822 | SvREADONLY_on(av); |
6cef1e77 |
823 | } |
824 | goto magicalize; |
93a17b20 |
825 | case '#': |
a0d0e21e |
826 | case '*': |
599cee73 |
827 | if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV) |
cea2e8a9 |
828 | Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name); |
a0d0e21e |
829 | /* FALL THROUGH */ |
830 | case '[': |
93a17b20 |
831 | case '^': |
832 | case '~': |
833 | case '=': |
93a17b20 |
834 | case '%': |
835 | case '.': |
93a17b20 |
836 | case '(': |
837 | case ')': |
838 | case '<': |
839 | case '>': |
840 | case ',': |
841 | case '\\': |
842 | case '/': |
16070b82 |
843 | case '\001': /* $^A */ |
844 | case '\003': /* $^C */ |
845 | case '\004': /* $^D */ |
846 | case '\005': /* $^E */ |
847 | case '\006': /* $^F */ |
848 | case '\010': /* $^H */ |
849 | case '\011': /* $^I, NOT \t in EBCDIC */ |
16070b82 |
850 | case '\020': /* $^P */ |
851 | case '\024': /* $^T */ |
463ee0b2 |
852 | if (len > 1) |
853 | break; |
854 | goto magicalize; |
d8ce0c9a |
855 | case '|': |
856 | if (len > 1) |
857 | break; |
858 | sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
859 | goto magicalize; |
ac27b0f5 |
860 | case '\017': /* $^O & $^OPEN */ |
861 | if (len > 1 && strNE(name, "\017PEN")) |
862 | break; |
863 | goto magicalize; |
16070b82 |
864 | case '\023': /* $^S */ |
6cef1e77 |
865 | if (len > 1) |
866 | break; |
867 | goto ro_magicalize; |
6a818117 |
868 | case '\027': /* $^W & $^WARNING_BITS */ |
a50e31ad |
869 | if (len > 1 && strNE(name, "\027ARNING_BITS") |
870 | && strNE(name, "\027IDE_SYSTEM_CALLS")) |
4438c4b7 |
871 | break; |
872 | goto magicalize; |
463ee0b2 |
873 | |
a0d0e21e |
874 | case '+': |
6cef1e77 |
875 | if (len > 1) |
876 | break; |
877 | else { |
878 | AV* av = GvAVn(gv); |
879 | sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0); |
03a27ae7 |
880 | SvREADONLY_on(av); |
6cef1e77 |
881 | } |
882 | /* FALL THROUGH */ |
463ee0b2 |
883 | case '1': |
884 | case '2': |
885 | case '3': |
886 | case '4': |
887 | case '5': |
888 | case '6': |
889 | case '7': |
890 | case '8': |
891 | case '9': |
a0d0e21e |
892 | ro_magicalize: |
893 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
894 | magicalize: |
463ee0b2 |
895 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
896 | break; |
897 | |
16070b82 |
898 | case '\014': /* $^L */ |
463ee0b2 |
899 | if (len > 1) |
900 | break; |
93a17b20 |
901 | sv_setpv(GvSV(gv),"\f"); |
3280af22 |
902 | PL_formfeed = GvSV(gv); |
93a17b20 |
903 | break; |
904 | case ';': |
463ee0b2 |
905 | if (len > 1) |
906 | break; |
93a17b20 |
907 | sv_setpv(GvSV(gv),"\034"); |
908 | break; |
463ee0b2 |
909 | case ']': |
910 | if (len == 1) { |
f86702cc |
911 | SV *sv = GvSV(gv); |
5089c844 |
912 | (void)SvUPGRADE(sv, SVt_PVNV); |
6a6ba966 |
913 | Perl_sv_setpvf(aTHX_ sv, |
914 | #if defined(PERL_SUBVERSION) && (PERL_SUBVERSION > 0) |
915 | "%8.6" |
916 | #else |
917 | "%5.3" |
918 | #endif |
919 | NVff, |
920 | SvNVX(PL_patchlevel)); |
5089c844 |
921 | SvNVX(sv) = SvNVX(PL_patchlevel); |
922 | SvNOK_on(sv); |
5089c844 |
923 | SvREADONLY_on(sv); |
93a17b20 |
924 | } |
925 | break; |
16070b82 |
926 | case '\026': /* $^V */ |
927 | if (len == 1) { |
928 | SV *sv = GvSV(gv); |
929 | GvSV(gv) = SvREFCNT_inc(PL_patchlevel); |
930 | SvREFCNT_dec(sv); |
931 | } |
932 | break; |
79072805 |
933 | } |
93a17b20 |
934 | return gv; |
79072805 |
935 | } |
936 | |
937 | void |
43693395 |
938 | Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
939 | { |
940 | HV *hv = GvSTASH(gv); |
941 | if (!hv) { |
942 | (void)SvOK_off(sv); |
943 | return; |
944 | } |
945 | sv_setpv(sv, prefix ? prefix : ""); |
946 | if (keepmain || strNE(HvNAME(hv), "main")) { |
947 | sv_catpv(sv,HvNAME(hv)); |
948 | sv_catpvn(sv,"::", 2); |
949 | } |
950 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
951 | } |
952 | |
953 | void |
864dbfa3 |
954 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
955 | { |
956 | HV *hv = GvSTASH(gv); |
f967eb5f |
957 | if (!hv) { |
155aba94 |
958 | (void)SvOK_off(sv); |
79072805 |
959 | return; |
f967eb5f |
960 | } |
961 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
962 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
963 | sv_catpvn(sv,"::", 2); |
79072805 |
964 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
965 | } |
966 | |
967 | void |
43693395 |
968 | Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
969 | { |
970 | GV *egv = GvEGV(gv); |
971 | if (!egv) |
972 | egv = gv; |
973 | gv_fullname4(sv, egv, prefix, keepmain); |
974 | } |
975 | |
976 | void |
864dbfa3 |
977 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 |
978 | { |
f967eb5f |
979 | GV *egv = GvEGV(gv); |
748a9306 |
980 | if (!egv) |
981 | egv = gv; |
f6aff53a |
982 | gv_fullname3(sv, egv, prefix); |
983 | } |
984 | |
985 | /* XXX compatibility with versions <= 5.003. */ |
986 | void |
864dbfa3 |
987 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
988 | { |
989 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
990 | } |
991 | |
992 | /* XXX compatibility with versions <= 5.003. */ |
993 | void |
864dbfa3 |
994 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
f6aff53a |
995 | { |
996 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
997 | } |
998 | |
999 | IO * |
864dbfa3 |
1000 | Perl_newIO(pTHX) |
79072805 |
1001 | { |
11343788 |
1002 | dTHR; |
79072805 |
1003 | IO *io; |
8990e307 |
1004 | GV *iogv; |
1005 | |
1006 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
1007 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
1008 | SvREFCNT(io) = 1; |
1009 | SvOBJECT_on(io); |
c9de509e |
1010 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d |
1011 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1012 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
c9de509e |
1013 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
1014 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
1015 | return io; |
1016 | } |
1017 | |
1018 | void |
864dbfa3 |
1019 | Perl_gv_check(pTHX_ HV *stash) |
79072805 |
1020 | { |
11343788 |
1021 | dTHR; |
79072805 |
1022 | register HE *entry; |
1023 | register I32 i; |
1024 | register GV *gv; |
463ee0b2 |
1025 | HV *hv; |
1026 | |
8990e307 |
1027 | if (!HvARRAY(stash)) |
1028 | return; |
a0d0e21e |
1029 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
1030 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
1031 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
1032 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
1033 | { |
19b6c847 |
1034 | if (hv != PL_defstash && hv != stash) |
a0d0e21e |
1035 | gv_check(hv); /* nested package */ |
1036 | } |
dc437b57 |
1037 | else if (isALPHA(*HeKEY(entry))) { |
1d7c1841 |
1038 | char *file; |
dc437b57 |
1039 | gv = (GV*)HeVAL(entry); |
55d729e4 |
1040 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
1041 | continue; |
1d7c1841 |
1042 | file = GvFILE(gv); |
1043 | /* performance hack: if filename is absolute and it's a standard |
1044 | * module, don't bother warning */ |
1045 | if (file |
1046 | && PERL_FILE_IS_ABSOLUTE(file) |
1047 | && (instr(file, "/lib/") || instr(file, ".pm"))) |
1048 | { |
8990e307 |
1049 | continue; |
1d7c1841 |
1050 | } |
1051 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1052 | #ifdef USE_ITHREADS |
1053 | CopFILE(PL_curcop) = file; /* set for warning */ |
1054 | #else |
1055 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
1056 | #endif |
cea2e8a9 |
1057 | Perl_warner(aTHX_ WARN_ONCE, |
599cee73 |
1058 | "Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
1059 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
1060 | } |
79072805 |
1061 | } |
1062 | } |
1063 | } |
1064 | |
1065 | GV * |
864dbfa3 |
1066 | Perl_newGVgen(pTHX_ char *pack) |
79072805 |
1067 | { |
cea2e8a9 |
1068 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
1069 | TRUE, SVt_PVGV); |
79072805 |
1070 | } |
1071 | |
1072 | /* hopefully this is only called on local symbol table entries */ |
1073 | |
1074 | GP* |
864dbfa3 |
1075 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 |
1076 | { |
1d7c1841 |
1077 | if (!gp) |
1078 | return (GP*)NULL; |
79072805 |
1079 | gp->gp_refcnt++; |
44a8e56a |
1080 | if (gp->gp_cv) { |
1081 | if (gp->gp_cvgen) { |
1082 | /* multi-named GPs cannot be used for method cache */ |
1083 | SvREFCNT_dec(gp->gp_cv); |
1084 | gp->gp_cv = Nullcv; |
1085 | gp->gp_cvgen = 0; |
1086 | } |
1087 | else { |
1088 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
1089 | PL_sub_generation++; |
44a8e56a |
1090 | } |
1091 | } |
79072805 |
1092 | return gp; |
79072805 |
1093 | } |
1094 | |
1095 | void |
864dbfa3 |
1096 | Perl_gp_free(pTHX_ GV *gv) |
79072805 |
1097 | { |
b267980d |
1098 | dTHR; |
79072805 |
1099 | GP* gp; |
1100 | |
1101 | if (!gv || !(gp = GvGP(gv))) |
1102 | return; |
f248d071 |
1103 | if (gp->gp_refcnt == 0) { |
1104 | if (ckWARN_d(WARN_INTERNAL)) |
1105 | Perl_warner(aTHX_ WARN_INTERNAL, |
1106 | "Attempt to free unreferenced glob pointers"); |
79072805 |
1107 | return; |
1108 | } |
44a8e56a |
1109 | if (gp->gp_cv) { |
1110 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
1111 | PL_sub_generation++; |
44a8e56a |
1112 | } |
748a9306 |
1113 | if (--gp->gp_refcnt > 0) { |
1114 | if (gp->gp_egv == gv) |
1115 | gp->gp_egv = 0; |
79072805 |
1116 | return; |
748a9306 |
1117 | } |
79072805 |
1118 | |
8990e307 |
1119 | SvREFCNT_dec(gp->gp_sv); |
1120 | SvREFCNT_dec(gp->gp_av); |
1121 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
1122 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
1123 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
1124 | SvREFCNT_dec(gp->gp_form); |
1125 | |
79072805 |
1126 | Safefree(gp); |
1127 | GvGP(gv) = 0; |
1128 | } |
1129 | |
1130 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
1131 | #define MICROPORT |
1132 | #endif |
1133 | |
1134 | #ifdef MICROPORT /* Microport 2.4 hack */ |
1135 | AV *GvAVn(gv) |
1136 | register GV *gv; |
1137 | { |
b267980d |
1138 | if (GvGP(gv)->gp_av) |
79072805 |
1139 | return GvGP(gv)->gp_av; |
1140 | else |
1141 | return GvGP(gv_AVadd(gv))->gp_av; |
1142 | } |
1143 | |
1144 | HV *GvHVn(gv) |
1145 | register GV *gv; |
1146 | { |
1147 | if (GvGP(gv)->gp_hv) |
1148 | return GvGP(gv)->gp_hv; |
1149 | else |
1150 | return GvGP(gv_HVadd(gv))->gp_hv; |
1151 | } |
1152 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
1153 | |
a0d0e21e |
1154 | /* Updates and caches the CV's */ |
1155 | |
1156 | bool |
864dbfa3 |
1157 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e |
1158 | { |
155aba94 |
1159 | dTHR; |
a0d0e21e |
1160 | GV* gv; |
1161 | CV* cv; |
1162 | MAGIC* mg=mg_find((SV*)stash,'c'); |
8ac85365 |
1163 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1164 | AMT amt; |
2d8e6c8d |
1165 | STRLEN n_a; |
155aba94 |
1166 | #ifdef OVERLOAD_VIA_HASH |
1167 | GV** gvp; |
1168 | HV* hv; |
1169 | #endif |
a0d0e21e |
1170 | |
3280af22 |
1171 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1172 | && amtp->was_ok_sub == PL_sub_generation) |
a6006777 |
1173 | return AMT_AMAGIC(amtp); |
1174 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
1175 | int i; |
a6006777 |
1176 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
1177 | if (amtp->table[i]) { |
1178 | SvREFCNT_dec(amtp->table[i]); |
1179 | } |
1180 | } |
1181 | } |
a0d0e21e |
1182 | sv_unmagic((SV*)stash, 'c'); |
1183 | |
cea2e8a9 |
1184 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
a0d0e21e |
1185 | |
3280af22 |
1186 | amt.was_ok_am = PL_amagic_generation; |
1187 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1188 | amt.fallback = AMGfallNO; |
1189 | amt.flags = 0; |
1190 | |
1191 | #ifdef OVERLOAD_VIA_HASH |
1192 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
3280af22 |
1193 | if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) { |
a0d0e21e |
1194 | int filled=0; |
1195 | int i; |
1196 | char *cp; |
a0d0e21e |
1197 | SV* sv; |
1198 | SV** svp; |
a0d0e21e |
1199 | |
22c35a8c |
1200 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a0d0e21e |
1201 | |
22c35a8c |
1202 | if (( cp = (char *)PL_AMG_names[0] ) && |
a6006777 |
1203 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
1204 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1205 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1206 | } |
a6006777 |
1207 | for (i = 1; i < NofAMmeth; i++) { |
1208 | cv = 0; |
22c35a8c |
1209 | cp = (char *)PL_AMG_names[i]; |
b267980d |
1210 | |
a6006777 |
1211 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
3280af22 |
1212 | if (svp && ((sv = *svp) != &PL_sv_undef)) { |
a0d0e21e |
1213 | switch (SvTYPE(sv)) { |
1214 | default: |
1215 | if (!SvROK(sv)) { |
1216 | if (!SvOK(sv)) break; |
2d8e6c8d |
1217 | gv = gv_fetchmethod(stash, SvPV(sv, n_a)); |
a0d0e21e |
1218 | if (gv) cv = GvCV(gv); |
1219 | break; |
1220 | } |
1221 | cv = (CV*)SvRV(sv); |
1222 | if (SvTYPE(cv) == SVt_PVCV) |
1223 | break; |
1224 | /* FALL THROUGH */ |
1225 | case SVt_PVHV: |
1226 | case SVt_PVAV: |
cea2e8a9 |
1227 | Perl_croak(aTHX_ "Not a subroutine reference in overload table"); |
a0d0e21e |
1228 | return FALSE; |
1229 | case SVt_PVCV: |
8ebc5c01 |
1230 | cv = (CV*)sv; |
1231 | break; |
a0d0e21e |
1232 | case SVt_PVGV: |
8ebc5c01 |
1233 | if (!(cv = GvCVu((GV*)sv))) |
f6ec51f7 |
1234 | cv = sv_2cv(sv, &stash, &gv, FALSE); |
8ebc5c01 |
1235 | break; |
a0d0e21e |
1236 | } |
1237 | if (cv) filled=1; |
1238 | else { |
cea2e8a9 |
1239 | Perl_croak(aTHX_ "Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1240 | cp,HvNAME(stash)); |
1241 | return FALSE; |
1242 | } |
1243 | } |
a6006777 |
1244 | #else |
1245 | { |
1246 | int filled = 0; |
1247 | int i; |
9607fc9c |
1248 | const char *cp; |
a6006777 |
1249 | SV* sv = NULL; |
a6006777 |
1250 | |
22c35a8c |
1251 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 |
1252 | |
155aba94 |
1253 | if ((cp = PL_AMG_names[0])) { |
a6006777 |
1254 | /* Try to find via inheritance. */ |
774d564b |
1255 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
155aba94 |
1256 | if (gv) |
1257 | sv = GvSV(gv); |
1258 | |
1259 | if (!gv) |
1260 | goto no_table; |
1261 | else if (SvTRUE(sv)) |
1262 | amt.fallback=AMGfallYES; |
1263 | else if (SvOK(sv)) |
1264 | amt.fallback=AMGfallNEVER; |
a6006777 |
1265 | } |
1266 | |
1267 | for (i = 1; i < NofAMmeth; i++) { |
cea2e8a9 |
1268 | SV *cookie = sv_2mortal(Perl_newSVpvf(aTHX_ "(%s", cp = PL_AMG_names[i])); |
1269 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
44a8e56a |
1270 | cp, HvNAME(stash)) ); |
46fc3d4c |
1271 | /* don't fill the cache while looking up! */ |
1272 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
1273 | cv = 0; |
44a8e56a |
1274 | if(gv && (cv = GvCV(gv))) { |
44a8e56a |
1275 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1276 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1277 | /* GvSV contains the name of the method. */ |
1278 | GV *ngv; |
1279 | |
b267980d |
1280 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
2d8e6c8d |
1281 | SvPV(GvSV(gv), n_a), cp, HvNAME(stash)) ); |
b267980d |
1282 | if (!SvPOK(GvSV(gv)) |
dc848c6f |
1283 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1284 | FALSE))) |
1285 | { |
44a8e56a |
1286 | /* Can be an import stub (created by `can'). */ |
1287 | if (GvCVGEN(gv)) { |
b267980d |
1288 | Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1289 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1290 | cp, HvNAME(stash)); |
1291 | } else |
b267980d |
1292 | Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a |
1293 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1294 | cp, HvNAME(stash)); |
1295 | } |
dc848c6f |
1296 | cv = GvCV(gv = ngv); |
44a8e56a |
1297 | } |
cea2e8a9 |
1298 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
44a8e56a |
1299 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1300 | GvNAME(CvGV(cv))) ); |
1301 | filled = 1; |
1302 | } |
b267980d |
1303 | #endif |
a6006777 |
1304 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1305 | } |
a0d0e21e |
1306 | if (filled) { |
a6006777 |
1307 | AMT_AMAGIC_on(&amt); |
1308 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1309 | return TRUE; |
1310 | } |
1311 | } |
a6006777 |
1312 | /* Here we have no table: */ |
774d564b |
1313 | no_table: |
a6006777 |
1314 | AMT_AMAGIC_off(&amt); |
1315 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1316 | return FALSE; |
1317 | } |
1318 | |
a0d0e21e |
1319 | SV* |
864dbfa3 |
1320 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e |
1321 | { |
11343788 |
1322 | dTHR; |
b267980d |
1323 | MAGIC *mg; |
1324 | CV *cv; |
a0d0e21e |
1325 | CV **cvp=NULL, **ocvp=NULL; |
1326 | AMT *amtp, *oamtp; |
1327 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
ee239bfe |
1328 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
a0d0e21e |
1329 | HV* stash; |
1330 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1331 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
b267980d |
1332 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1333 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1334 | : (CV **) NULL)) |
b267980d |
1335 | && ((cv = cvp[off=method+assignshift]) |
748a9306 |
1336 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1337 | * usual method */ |
1338 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1339 | lr = -1; /* Call method for left argument */ |
1340 | } else { |
1341 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1342 | int logic; |
1343 | |
1344 | /* look for substituted methods */ |
ee239bfe |
1345 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1346 | switch (method) { |
1347 | case inc_amg: |
ee239bfe |
1348 | force_cpy = 1; |
1349 | if ((cv = cvp[off=add_ass_amg]) |
1350 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1351 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1352 | } |
1353 | break; |
1354 | case dec_amg: |
ee239bfe |
1355 | force_cpy = 1; |
1356 | if ((cv = cvp[off = subtr_ass_amg]) |
1357 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1358 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1359 | } |
1360 | break; |
1361 | case bool__amg: |
1362 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1363 | break; |
1364 | case numer_amg: |
1365 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1366 | break; |
1367 | case string_amg: |
1368 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1369 | break; |
dc437b57 |
1370 | case not_amg: |
b267980d |
1371 | (void)((cv = cvp[off=bool__amg]) |
dc437b57 |
1372 | || (cv = cvp[off=numer_amg]) |
1373 | || (cv = cvp[off=string_amg])); |
1374 | postpr = 1; |
1375 | break; |
748a9306 |
1376 | case copy_amg: |
1377 | { |
76e3520e |
1378 | /* |
1379 | * SV* ref causes confusion with the interpreter variable of |
1380 | * the same name |
1381 | */ |
1382 | SV* tmpRef=SvRV(left); |
1383 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1384 | /* |
1385 | * Just to be extra cautious. Maybe in some |
1386 | * additional cases sv_setsv is safe, too. |
1387 | */ |
76e3520e |
1388 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1389 | SvOBJECT_on(newref); |
76e3520e |
1390 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1391 | return newref; |
1392 | } |
1393 | } |
1394 | break; |
a0d0e21e |
1395 | case abs_amg: |
b267980d |
1396 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1397 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1398 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1399 | if (off1==lt_amg) { |
748a9306 |
1400 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1401 | lt_amg,AMGf_noright); |
1402 | logic = SvTRUE(lessp); |
1403 | } else { |
748a9306 |
1404 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1405 | ncmp_amg,AMGf_noright); |
1406 | logic = (SvNV(lessp) < 0); |
1407 | } |
1408 | if (logic) { |
1409 | if (off==subtr_amg) { |
1410 | right = left; |
748a9306 |
1411 | left = nullsv; |
a0d0e21e |
1412 | lr = 1; |
1413 | } |
1414 | } else { |
1415 | return left; |
1416 | } |
1417 | } |
1418 | break; |
1419 | case neg_amg: |
155aba94 |
1420 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e |
1421 | right = left; |
1422 | left = sv_2mortal(newSViv(0)); |
1423 | lr = 1; |
1424 | } |
1425 | break; |
f5284f61 |
1426 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d |
1427 | /* FAIL safe */ |
1428 | return NULL; /* Delegate operation to standard mechanisms. */ |
1429 | break; |
f5284f61 |
1430 | case to_sv_amg: |
1431 | case to_av_amg: |
1432 | case to_hv_amg: |
1433 | case to_gv_amg: |
1434 | case to_cv_amg: |
1435 | /* FAIL safe */ |
b267980d |
1436 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 |
1437 | break; |
a0d0e21e |
1438 | default: |
1439 | goto not_found; |
1440 | } |
1441 | if (!cv) goto not_found; |
1442 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1443 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
b267980d |
1444 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 |
1445 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1446 | : (CV **) NULL)) |
a0d0e21e |
1447 | && (cv = cvp[off=method])) { /* Method for right |
1448 | * argument found */ |
1449 | lr=1; |
b267980d |
1450 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1451 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1452 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1453 | && !(flags & AMGf_unary)) { |
1454 | /* We look for substitution for |
1455 | * comparison operations and |
fc36a67e |
1456 | * concatenation */ |
a0d0e21e |
1457 | if (method==concat_amg || method==concat_ass_amg |
1458 | || method==repeat_amg || method==repeat_ass_amg) { |
1459 | return NULL; /* Delegate operation to string conversion */ |
1460 | } |
1461 | off = -1; |
1462 | switch (method) { |
1463 | case lt_amg: |
1464 | case le_amg: |
1465 | case gt_amg: |
1466 | case ge_amg: |
1467 | case eq_amg: |
1468 | case ne_amg: |
1469 | postpr = 1; off=ncmp_amg; break; |
1470 | case slt_amg: |
1471 | case sle_amg: |
1472 | case sgt_amg: |
1473 | case sge_amg: |
1474 | case seq_amg: |
1475 | case sne_amg: |
1476 | postpr = 1; off=scmp_amg; break; |
1477 | } |
1478 | if (off != -1) cv = cvp[off]; |
1479 | if (!cv) { |
1480 | goto not_found; |
1481 | } |
1482 | } else { |
a6006777 |
1483 | not_found: /* No method found, either report or croak */ |
b267980d |
1484 | switch (method) { |
1485 | case to_sv_amg: |
1486 | case to_av_amg: |
1487 | case to_hv_amg: |
1488 | case to_gv_amg: |
1489 | case to_cv_amg: |
1490 | /* FAIL safe */ |
1491 | return left; /* Delegate operation to standard mechanisms. */ |
1492 | break; |
1493 | } |
a0d0e21e |
1494 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1495 | notfound = 1; lr = -1; |
1496 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1497 | notfound = 1; lr = 1; |
1498 | } else { |
46fc3d4c |
1499 | SV *msg; |
774d564b |
1500 | if (off==-1) off=method; |
b267980d |
1501 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
46fc3d4c |
1502 | "Operation `%s': no method found,%sargument %s%s%s%s", |
22c35a8c |
1503 | PL_AMG_names[method + assignshift], |
e7ea3e70 |
1504 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d |
1505 | SvAMAGIC(left)? |
a0d0e21e |
1506 | "in overloaded package ": |
1507 | "has no overloaded magic", |
b267980d |
1508 | SvAMAGIC(left)? |
a0d0e21e |
1509 | HvNAME(SvSTASH(SvRV(left))): |
1510 | "", |
b267980d |
1511 | SvAMAGIC(right)? |
e7ea3e70 |
1512 | ",\n\tright argument in overloaded package ": |
b267980d |
1513 | (flags & AMGf_unary |
e7ea3e70 |
1514 | ? "" |
1515 | : ",\n\tright argument has no overloaded magic"), |
b267980d |
1516 | SvAMAGIC(right)? |
a0d0e21e |
1517 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1518 | "")); |
a0d0e21e |
1519 | if (amtp && amtp->fallback >= AMGfallYES) { |
cea2e8a9 |
1520 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
a0d0e21e |
1521 | } else { |
894356b3 |
1522 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e |
1523 | } |
1524 | return NULL; |
1525 | } |
ee239bfe |
1526 | force_cpy = force_cpy || assign; |
a0d0e21e |
1527 | } |
1528 | } |
1529 | if (!notfound) { |
b267980d |
1530 | DEBUG_o( Perl_deb(aTHX_ |
46fc3d4c |
1531 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
22c35a8c |
1532 | PL_AMG_names[off], |
748a9306 |
1533 | method+assignshift==off? "" : |
1534 | " (initially `", |
1535 | method+assignshift==off? "" : |
22c35a8c |
1536 | PL_AMG_names[method+assignshift], |
748a9306 |
1537 | method+assignshift==off? "" : "')", |
1538 | flags & AMGf_unary? "" : |
1539 | lr==1 ? " for right argument": " for left argument", |
1540 | flags & AMGf_unary? " for argument" : "", |
b267980d |
1541 | HvNAME(stash), |
a0d0e21e |
1542 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1543 | } |
748a9306 |
1544 | /* Since we use shallow copy during assignment, we need |
1545 | * to dublicate the contents, probably calling user-supplied |
1546 | * version of copy operator |
1547 | */ |
ee239bfe |
1548 | /* We need to copy in following cases: |
1549 | * a) Assignment form was called. |
1550 | * assignshift==1, assign==T, method + 1 == off |
1551 | * b) Increment or decrement, called directly. |
1552 | * assignshift==0, assign==0, method + 0 == off |
1553 | * c) Increment or decrement, translated to assignment add/subtr. |
b267980d |
1554 | * assignshift==0, assign==T, |
ee239bfe |
1555 | * force_cpy == T |
1556 | * d) Increment or decrement, translated to nomethod. |
b267980d |
1557 | * assignshift==0, assign==0, |
ee239bfe |
1558 | * force_cpy == T |
1559 | * e) Assignment form translated to nomethod. |
1560 | * assignshift==1, assign==T, method + 1 != off |
1561 | * force_cpy == T |
1562 | */ |
1563 | /* off is method, method+assignshift, or a result of opcode substitution. |
1564 | * In the latter case assignshift==0, so only notfound case is important. |
1565 | */ |
1566 | if (( (method + assignshift == off) |
1567 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1568 | || force_cpy) |
1569 | RvDEEPCP(left); |
a0d0e21e |
1570 | { |
1571 | dSP; |
1572 | BINOP myop; |
1573 | SV* res; |
54310121 |
1574 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1575 | |
54310121 |
1576 | CATCH_SET(TRUE); |
a0d0e21e |
1577 | Zero(&myop, 1, BINOP); |
1578 | myop.op_last = (OP *) &myop; |
1579 | myop.op_next = Nullop; |
54310121 |
1580 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1581 | |
e788e7d3 |
1582 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1583 | ENTER; |
462e5cf6 |
1584 | SAVEOP(); |
533c011a |
1585 | PL_op = (OP *) &myop; |
3280af22 |
1586 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1587 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1588 | PUTBACK; |
cea2e8a9 |
1589 | pp_pushmark(); |
a0d0e21e |
1590 | |
924508f0 |
1591 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1592 | PUSHs(lr>0? right: left); |
1593 | PUSHs(lr>0? left: right); |
3280af22 |
1594 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1595 | if (notfound) { |
22c35a8c |
1596 | PUSHs( sv_2mortal(newSVpv((char *)PL_AMG_names[method + assignshift],0))); |
a0d0e21e |
1597 | } |
1598 | PUSHs((SV*)cv); |
1599 | PUTBACK; |
1600 | |
155aba94 |
1601 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 |
1602 | CALLRUNOPS(aTHX); |
a0d0e21e |
1603 | LEAVE; |
1604 | SPAGAIN; |
1605 | |
1606 | res=POPs; |
ebafeae7 |
1607 | PUTBACK; |
d3acc0f7 |
1608 | POPSTACK; |
54310121 |
1609 | CATCH_SET(oldcatch); |
a0d0e21e |
1610 | |
a0d0e21e |
1611 | if (postpr) { |
1612 | int ans; |
1613 | switch (method) { |
1614 | case le_amg: |
1615 | case sle_amg: |
1616 | ans=SvIV(res)<=0; break; |
1617 | case lt_amg: |
1618 | case slt_amg: |
1619 | ans=SvIV(res)<0; break; |
1620 | case ge_amg: |
1621 | case sge_amg: |
1622 | ans=SvIV(res)>=0; break; |
1623 | case gt_amg: |
1624 | case sgt_amg: |
1625 | ans=SvIV(res)>0; break; |
1626 | case eq_amg: |
1627 | case seq_amg: |
1628 | ans=SvIV(res)==0; break; |
1629 | case ne_amg: |
1630 | case sne_amg: |
1631 | ans=SvIV(res)!=0; break; |
1632 | case inc_amg: |
1633 | case dec_amg: |
bbce6d69 |
1634 | SvSetSV(left,res); return left; |
dc437b57 |
1635 | case not_amg: |
fe7ac86a |
1636 | ans=!SvTRUE(res); break; |
a0d0e21e |
1637 | } |
54310121 |
1638 | return boolSV(ans); |
748a9306 |
1639 | } else if (method==copy_amg) { |
1640 | if (!SvROK(res)) { |
cea2e8a9 |
1641 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 |
1642 | } |
1643 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1644 | } else { |
1645 | return res; |
1646 | } |
1647 | } |
1648 | } |
c9d5ac95 |
1649 | |
1650 | /* |
1651 | =for apidoc is_gv_magical |
1652 | |
1653 | Returns C<TRUE> if given the name of a magical GV. |
1654 | |
1655 | Currently only useful internally when determining if a GV should be |
1656 | created even in rvalue contexts. |
1657 | |
1658 | C<flags> is not used at present but available for future extension to |
1659 | allow selecting particular classes of magical variable. |
1660 | |
1661 | =cut |
1662 | */ |
1663 | bool |
1664 | Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) |
1665 | { |
1666 | if (!len) |
1667 | return FALSE; |
1668 | |
1669 | switch (*name) { |
1670 | case 'I': |
1671 | if (len == 3 && strEQ(name, "ISA")) |
1672 | goto yes; |
1673 | break; |
1674 | case 'O': |
1675 | if (len == 8 && strEQ(name, "OVERLOAD")) |
1676 | goto yes; |
1677 | break; |
1678 | case 'S': |
1679 | if (len == 3 && strEQ(name, "SIG")) |
1680 | goto yes; |
1681 | break; |
ac27b0f5 |
1682 | case '\017': /* $^O & $^OPEN */ |
1683 | if (len == 1 |
1684 | || (len == 4 && strEQ(name, "\027PEN"))) |
1685 | { |
1686 | goto yes; |
1687 | } |
1688 | break; |
c9d5ac95 |
1689 | case '\027': /* $^W & $^WARNING_BITS */ |
1690 | if (len == 1 |
1691 | || (len == 12 && strEQ(name, "\027ARNING_BITS")) |
1692 | || (len == 17 && strEQ(name, "\027IDE_SYSTEM_CALLS"))) |
1693 | { |
1694 | goto yes; |
1695 | } |
1696 | break; |
1697 | |
1698 | case '&': |
1699 | case '`': |
1700 | case '\'': |
1701 | case ':': |
1702 | case '?': |
1703 | case '!': |
1704 | case '-': |
1705 | case '#': |
1706 | case '*': |
1707 | case '[': |
1708 | case '^': |
1709 | case '~': |
1710 | case '=': |
1711 | case '%': |
1712 | case '.': |
1713 | case '(': |
1714 | case ')': |
1715 | case '<': |
1716 | case '>': |
1717 | case ',': |
1718 | case '\\': |
1719 | case '/': |
1720 | case '|': |
1721 | case '+': |
1722 | case ';': |
1723 | case ']': |
1724 | case '\001': /* $^A */ |
1725 | case '\003': /* $^C */ |
1726 | case '\004': /* $^D */ |
1727 | case '\005': /* $^E */ |
1728 | case '\006': /* $^F */ |
1729 | case '\010': /* $^H */ |
1730 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1731 | case '\014': /* $^L */ |
c9d5ac95 |
1732 | case '\020': /* $^P */ |
1733 | case '\023': /* $^S */ |
1734 | case '\024': /* $^T */ |
1735 | case '\026': /* $^V */ |
1736 | if (len == 1) |
1737 | goto yes; |
1738 | break; |
1739 | case '1': |
1740 | case '2': |
1741 | case '3': |
1742 | case '4': |
1743 | case '5': |
1744 | case '6': |
1745 | case '7': |
1746 | case '8': |
1747 | case '9': |
1748 | if (len > 1) { |
1749 | char *end = name + len; |
1750 | while (--end > name) { |
1751 | if (!isDIGIT(*end)) |
1752 | return FALSE; |
1753 | } |
1754 | } |
1755 | yes: |
1756 | return TRUE; |
1757 | default: |
1758 | break; |
1759 | } |
1760 | return FALSE; |
1761 | } |