Commit | Line | Data |
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a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
be3c0a43 | 3 | * Copyright (c) 1991-2002, Larry Wall |
79072805 LW |
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 LW |
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 LW |
17 | */ |
18 | ||
ccfc67b7 JH |
19 | /* |
20 | =head1 GV Functions | |
21 | */ | |
22 | ||
79072805 | 23 | #include "EXTERN.h" |
864dbfa3 | 24 | #define PERL_IN_GV_C |
79072805 LW |
25 | #include "perl.h" |
26 | ||
27 | GV * | |
864dbfa3 | 28 | Perl_gv_AVadd(pTHX_ register GV *gv) |
79072805 | 29 | { |
a0d0e21e | 30 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 | 31 | Perl_croak(aTHX_ "Bad symbol for array"); |
79072805 LW |
32 | if (!GvAV(gv)) |
33 | GvAV(gv) = newAV(); | |
34 | return gv; | |
35 | } | |
36 | ||
37 | GV * | |
864dbfa3 | 38 | Perl_gv_HVadd(pTHX_ register GV *gv) |
79072805 | 39 | { |
a0d0e21e | 40 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
cea2e8a9 | 41 | Perl_croak(aTHX_ "Bad symbol for hash"); |
79072805 | 42 | if (!GvHV(gv)) |
463ee0b2 | 43 | GvHV(gv) = newHV(); |
79072805 LW |
44 | return gv; |
45 | } | |
46 | ||
47 | GV * | |
864dbfa3 | 48 | Perl_gv_IOadd(pTHX_ register GV *gv) |
a0d0e21e LW |
49 | { |
50 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) | |
cea2e8a9 | 51 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
5bd07a3d | 52 | if (!GvIOp(gv)) { |
7fb37951 AMS |
53 | #ifdef GV_UNIQUE_CHECK |
54 | if (GvUNIQUE(gv)) { | |
55 | Perl_croak(aTHX_ "Bad symbol for filehandle (GV is unique)"); | |
5bd07a3d DM |
56 | } |
57 | #endif | |
a0d0e21e | 58 | GvIOp(gv) = newIO(); |
5bd07a3d | 59 | } |
a0d0e21e LW |
60 | return gv; |
61 | } | |
62 | ||
63 | GV * | |
864dbfa3 | 64 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 65 | { |
eacec437 | 66 | char smallbuf[256]; |
53d95988 | 67 | char *tmpbuf; |
8ebc5c01 | 68 | STRLEN tmplen; |
79072805 LW |
69 | GV *gv; |
70 | ||
1d7c1841 GS |
71 | if (!PL_defstash) |
72 | return Nullgv; | |
73 | ||
53d95988 CS |
74 | tmplen = strlen(name) + 2; |
75 | if (tmplen < sizeof smallbuf) | |
76 | tmpbuf = smallbuf; | |
77 | else | |
78 | New(603, tmpbuf, tmplen + 1, char); | |
0ac0412a | 79 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
80 | tmpbuf[0] = '_'; |
81 | tmpbuf[1] = '<'; | |
82 | strcpy(tmpbuf + 2, name); | |
3280af22 | 83 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
1d7c1841 | 84 | if (!isGV(gv)) { |
3280af22 | 85 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
1d7c1841 GS |
86 | sv_setpv(GvSV(gv), name); |
87 | if (PERLDB_LINE) | |
14befaf4 | 88 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, PERL_MAGIC_dbfile); |
1d7c1841 | 89 | } |
53d95988 CS |
90 | if (tmpbuf != smallbuf) |
91 | Safefree(tmpbuf); | |
79072805 LW |
92 | return gv; |
93 | } | |
94 | ||
463ee0b2 | 95 | void |
864dbfa3 | 96 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
463ee0b2 LW |
97 | { |
98 | register GP *gp; | |
55d729e4 GS |
99 | bool doproto = SvTYPE(gv) > SVt_NULL; |
100 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; | |
463ee0b2 | 101 | |
dc437b57 | 102 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 GS |
103 | if (SvLEN(gv)) { |
104 | if (proto) { | |
105 | SvPVX(gv) = NULL; | |
106 | SvLEN(gv) = 0; | |
107 | SvPOK_off(gv); | |
108 | } else | |
109 | Safefree(SvPVX(gv)); | |
110 | } | |
44a8e56a | 111 | Newz(602, gp, 1, GP); |
8990e307 | 112 | GvGP(gv) = gp_ref(gp); |
463ee0b2 | 113 | GvSV(gv) = NEWSV(72,0); |
1d7c1841 GS |
114 | GvLINE(gv) = CopLINE(PL_curcop); |
115 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; | |
005a453c | 116 | GvCVGEN(gv) = 0; |
463ee0b2 | 117 | GvEGV(gv) = gv; |
14befaf4 | 118 | sv_magic((SV*)gv, (SV*)gv, PERL_MAGIC_glob, Nullch, 0); |
85aff577 | 119 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e | 120 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 | 121 | GvNAMELEN(gv) = len; |
23ad5bf5 | 122 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 | 123 | GvMULTI_on(gv); |
55d729e4 | 124 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 | 125 | SvIOK_off(gv); |
55d729e4 | 126 | ENTER; |
b099ddc0 | 127 | /* XXX unsafe for threads if eval_owner isn't held */ |
55d729e4 | 128 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 | 129 | GvCV(gv) = PL_compcv; |
55d729e4 GS |
130 | LEAVE; |
131 | ||
3280af22 | 132 | PL_sub_generation++; |
65c50114 | 133 | CvGV(GvCV(gv)) = gv; |
e0d088d0 | 134 | CvFILE_set_from_cop(GvCV(gv), PL_curcop); |
3280af22 | 135 | CvSTASH(GvCV(gv)) = PL_curstash; |
4d1ff10f | 136 | #ifdef USE_5005THREADS |
55d729e4 | 137 | CvOWNER(GvCV(gv)) = 0; |
1cfa4ec7 | 138 | if (!CvMUTEXP(GvCV(gv))) { |
b0a484d2 | 139 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
1cfa4ec7 GS |
140 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
141 | } | |
4d1ff10f | 142 | #endif /* USE_5005THREADS */ |
55d729e4 GS |
143 | if (proto) { |
144 | sv_setpv((SV*)GvCV(gv), proto); | |
145 | Safefree(proto); | |
146 | } | |
147 | } | |
463ee0b2 LW |
148 | } |
149 | ||
76e3520e | 150 | STATIC void |
cea2e8a9 | 151 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
a0d0e21e LW |
152 | { |
153 | switch (sv_type) { | |
154 | case SVt_PVIO: | |
155 | (void)GvIOn(gv); | |
156 | break; | |
157 | case SVt_PVAV: | |
158 | (void)GvAVn(gv); | |
159 | break; | |
160 | case SVt_PVHV: | |
161 | (void)GvHVn(gv); | |
162 | break; | |
163 | } | |
164 | } | |
165 | ||
954c1994 GS |
166 | /* |
167 | =for apidoc gv_fetchmeth | |
168 | ||
169 | Returns the glob with the given C<name> and a defined subroutine or | |
170 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
07766739 | 171 | accessible via @ISA and UNIVERSAL::. |
954c1994 GS |
172 | |
173 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
174 | side-effect creates a glob with the given C<name> in the given C<stash> | |
175 | which in the case of success contains an alias for the subroutine, and sets | |
b267980d | 176 | up caching info for this glob. Similarly for all the searched stashes. |
954c1994 GS |
177 | |
178 | This function grants C<"SUPER"> token as a postfix of the stash name. The | |
179 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not | |
4929bf7b | 180 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 181 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 182 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
183 | |
184 | =cut | |
185 | */ | |
186 | ||
79072805 | 187 | GV * |
864dbfa3 | 188 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
79072805 LW |
189 | { |
190 | AV* av; | |
463ee0b2 | 191 | GV* topgv; |
79072805 | 192 | GV* gv; |
463ee0b2 | 193 | GV** gvp; |
748a9306 | 194 | CV* cv; |
a0d0e21e | 195 | |
af09ea45 IK |
196 | /* UNIVERSAL methods should be callable without a stash */ |
197 | if (!stash) { | |
198 | level = -1; /* probably appropriate */ | |
199 | if(!(stash = gv_stashpvn("UNIVERSAL", 9, FALSE))) | |
200 | return 0; | |
201 | } | |
202 | ||
44a8e56a | 203 | if ((level > 100) || (level < -100)) |
cea2e8a9 | 204 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
3e0ccd42 | 205 | name, HvNAME(stash)); |
463ee0b2 | 206 | |
cea2e8a9 | 207 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a | 208 | |
209 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
210 | if (!gvp) | |
211 | topgv = Nullgv; | |
212 | else { | |
213 | topgv = *gvp; | |
214 | if (SvTYPE(topgv) != SVt_PVGV) | |
215 | gv_init(topgv, stash, name, len, TRUE); | |
155aba94 | 216 | if ((cv = GvCV(topgv))) { |
44a8e56a | 217 | /* If genuine method or valid cache entry, use it */ |
3280af22 | 218 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 | 219 | return topgv; |
44a8e56a | 220 | /* Stale cached entry: junk it */ |
221 | SvREFCNT_dec(cv); | |
222 | GvCV(topgv) = cv = Nullcv; | |
223 | GvCVGEN(topgv) = 0; | |
748a9306 | 224 | } |
3280af22 | 225 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c | 226 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 | 227 | } |
79072805 | 228 | |
9607fc9c | 229 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 | 230 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c | 231 | |
fb73857a | 232 | /* create and re-create @.*::SUPER::ISA on demand */ |
233 | if (!av || !SvMAGIC(av)) { | |
9607fc9c | 234 | char* packname = HvNAME(stash); |
235 | STRLEN packlen = strlen(packname); | |
236 | ||
237 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { | |
238 | HV* basestash; | |
239 | ||
240 | packlen -= 7; | |
241 | basestash = gv_stashpvn(packname, packlen, TRUE); | |
242 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); | |
3280af22 | 243 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
9607fc9c | 244 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
245 | if (!gvp || !(gv = *gvp)) | |
cea2e8a9 | 246 | Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); |
9607fc9c | 247 | if (SvTYPE(gv) != SVt_PVGV) |
248 | gv_init(gv, stash, "ISA", 3, TRUE); | |
249 | SvREFCNT_dec(GvAV(gv)); | |
250 | GvAV(gv) = (AV*)SvREFCNT_inc(av); | |
251 | } | |
252 | } | |
253 | } | |
254 | ||
255 | if (av) { | |
79072805 | 256 | SV** svp = AvARRAY(av); |
93965878 NIS |
257 | /* NOTE: No support for tied ISA */ |
258 | I32 items = AvFILLp(av) + 1; | |
79072805 | 259 | while (items--) { |
79072805 | 260 | SV* sv = *svp++; |
a0d0e21e | 261 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 | 262 | if (!basestash) { |
599cee73 | 263 | if (ckWARN(WARN_MISC)) |
9014280d | 264 | Perl_warner(aTHX_ packWARN(WARN_MISC), "Can't locate package %s for @%s::ISA", |
463ee0b2 | 265 | SvPVX(sv), HvNAME(stash)); |
79072805 LW |
266 | continue; |
267 | } | |
44a8e56a | 268 | gv = gv_fetchmeth(basestash, name, len, |
269 | (level >= 0) ? level + 1 : level - 1); | |
270 | if (gv) | |
271 | goto gotcha; | |
79072805 LW |
272 | } |
273 | } | |
a0d0e21e | 274 | |
9607fc9c | 275 | /* if at top level, try UNIVERSAL */ |
276 | ||
44a8e56a | 277 | if (level == 0 || level == -1) { |
9607fc9c | 278 | HV* lastchance; |
279 | ||
155aba94 GS |
280 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
281 | if ((gv = gv_fetchmeth(lastchance, name, len, | |
282 | (level >= 0) ? level + 1 : level - 1))) | |
283 | { | |
44a8e56a | 284 | gotcha: |
dc848c6f | 285 | /* |
286 | * Cache method in topgv if: | |
287 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
288 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
289 | */ | |
290 | if (topgv && | |
291 | GvREFCNT(topgv) == 1 && | |
292 | (cv = GvCV(gv)) && | |
293 | (CvROOT(cv) || CvXSUB(cv))) | |
294 | { | |
155aba94 | 295 | if ((cv = GvCV(topgv))) |
44a8e56a | 296 | SvREFCNT_dec(cv); |
297 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); | |
3280af22 | 298 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a | 299 | } |
a0d0e21e LW |
300 | return gv; |
301 | } | |
005a453c JP |
302 | else if (topgv && GvREFCNT(topgv) == 1) { |
303 | /* cache the fact that the method is not defined */ | |
3280af22 | 304 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c | 305 | } |
a0d0e21e LW |
306 | } |
307 | } | |
308 | ||
79072805 LW |
309 | return 0; |
310 | } | |
311 | ||
954c1994 | 312 | /* |
611c1e95 IZ |
313 | =for apidoc gv_fetchmeth_autoload |
314 | ||
315 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. | |
316 | Returns a glob for the subroutine. | |
317 | ||
318 | For an autoloaded subroutine without a GV, will create a GV even | |
319 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() | |
320 | of the result may be zero. | |
321 | ||
322 | =cut | |
323 | */ | |
324 | ||
325 | GV * | |
326 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) | |
327 | { | |
328 | GV *gv = gv_fetchmeth(stash, name, len, level); | |
329 | ||
330 | if (!gv) { | |
331 | char autoload[] = "AUTOLOAD"; | |
332 | STRLEN autolen = sizeof(autoload)-1; | |
333 | CV *cv; | |
334 | GV **gvp; | |
335 | ||
336 | if (!stash) | |
337 | return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ | |
338 | if (len == autolen && strnEQ(name, autoload, autolen)) | |
339 | return Nullgv; | |
340 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) | |
341 | return Nullgv; | |
342 | cv = GvCV(gv); | |
343 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
344 | return Nullgv; | |
345 | /* Have an autoload */ | |
346 | if (level < 0) /* Cannot do without a stub */ | |
347 | gv_fetchmeth(stash, name, len, 0); | |
348 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
349 | if (!gvp) | |
350 | return Nullgv; | |
351 | return *gvp; | |
352 | } | |
353 | return gv; | |
354 | } | |
355 | ||
356 | /* | |
954c1994 GS |
357 | =for apidoc gv_fetchmethod |
358 | ||
6d0f518e | 359 | See L<gv_fetchmethod_autoload>. |
954c1994 GS |
360 | |
361 | =cut | |
362 | */ | |
363 | ||
79072805 | 364 | GV * |
864dbfa3 | 365 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
463ee0b2 | 366 | { |
dc848c6f | 367 | return gv_fetchmethod_autoload(stash, name, TRUE); |
368 | } | |
369 | ||
954c1994 GS |
370 | /* |
371 | =for apidoc gv_fetchmethod_autoload | |
372 | ||
373 | Returns the glob which contains the subroutine to call to invoke the method | |
374 | on the C<stash>. In fact in the presence of autoloading this may be the | |
375 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is | |
b267980d | 376 | already setup. |
954c1994 GS |
377 | |
378 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
379 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 380 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 381 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 382 | with a non-zero C<autoload> parameter. |
954c1994 GS |
383 | |
384 | These functions grant C<"SUPER"> token as a prefix of the method name. Note | |
385 | that if you want to keep the returned glob for a long time, you need to | |
386 | check for it being "AUTOLOAD", since at the later time the call may load a | |
387 | different subroutine due to $AUTOLOAD changing its value. Use the glob | |
b267980d | 388 | created via a side effect to do this. |
954c1994 GS |
389 | |
390 | These functions have the same side-effects and as C<gv_fetchmeth> with | |
391 | C<level==0>. C<name> should be writable if contains C<':'> or C<' | |
392 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to | |
b267980d | 393 | C<call_sv> apply equally to these functions. |
954c1994 GS |
394 | |
395 | =cut | |
396 | */ | |
397 | ||
dc848c6f | 398 | GV * |
864dbfa3 | 399 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 400 | { |
08105a92 GS |
401 | register const char *nend; |
402 | const char *nsplit = 0; | |
a0d0e21e | 403 | GV* gv; |
b267980d | 404 | |
463ee0b2 | 405 | for (nend = name; *nend; nend++) { |
9607fc9c | 406 | if (*nend == '\'') |
a0d0e21e | 407 | nsplit = nend; |
9607fc9c | 408 | else if (*nend == ':' && *(nend + 1) == ':') |
409 | nsplit = ++nend; | |
a0d0e21e LW |
410 | } |
411 | if (nsplit) { | |
08105a92 | 412 | const char *origname = name; |
a0d0e21e | 413 | name = nsplit + 1; |
a0d0e21e LW |
414 | if (*nsplit == ':') |
415 | --nsplit; | |
9607fc9c | 416 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
417 | /* ->SUPER::method should really be looked up in original stash */ | |
cea2e8a9 | 418 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 | 419 | CopSTASHPV(PL_curcop))); |
af09ea45 | 420 | /* __PACKAGE__::SUPER stash should be autovivified */ |
9607fc9c | 421 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
cea2e8a9 | 422 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
9607fc9c | 423 | origname, HvNAME(stash), name) ); |
4633a7c4 | 424 | } |
e189a56d | 425 | else { |
af09ea45 IK |
426 | /* don't autovifify if ->NoSuchStash::method */ |
427 | stash = gv_stashpvn(origname, nsplit - origname, FALSE); | |
e189a56d IK |
428 | |
429 | /* however, explicit calls to Pkg::SUPER::method may | |
430 | happen, and may require autovivification to work */ | |
431 | if (!stash && (nsplit - origname) >= 7 && | |
432 | strnEQ(nsplit - 7, "::SUPER", 7) && | |
433 | gv_stashpvn(origname, nsplit - origname - 7, FALSE)) | |
434 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); | |
435 | } | |
4633a7c4 LW |
436 | } |
437 | ||
9607fc9c | 438 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 439 | if (!gv) { |
2f6e0fe7 | 440 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
3280af22 | 441 | gv = (GV*)&PL_sv_yes; |
dc848c6f | 442 | else if (autoload) |
54310121 | 443 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 | 444 | } |
dc848c6f | 445 | else if (autoload) { |
446 | CV* cv = GvCV(gv); | |
09280a33 CS |
447 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
448 | GV* stubgv; | |
449 | GV* autogv; | |
450 | ||
451 | if (CvANON(cv)) | |
452 | stubgv = gv; | |
453 | else { | |
454 | stubgv = CvGV(cv); | |
455 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
456 | stubgv = gv; | |
457 | } | |
458 | autogv = gv_autoload4(GvSTASH(stubgv), | |
459 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 460 | if (autogv) |
461 | gv = autogv; | |
462 | } | |
463 | } | |
44a8e56a | 464 | |
465 | return gv; | |
466 | } | |
467 | ||
468 | GV* | |
864dbfa3 | 469 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a | 470 | { |
df3728a2 JH |
471 | char autoload[] = "AUTOLOAD"; |
472 | STRLEN autolen = sizeof(autoload)-1; | |
44a8e56a | 473 | GV* gv; |
474 | CV* cv; | |
475 | HV* varstash; | |
476 | GV* vargv; | |
477 | SV* varsv; | |
478 | ||
af09ea45 IK |
479 | if (!stash) |
480 | return Nullgv; /* UNIVERSAL::AUTOLOAD could cause trouble */ | |
44a8e56a | 481 | if (len == autolen && strnEQ(name, autoload, autolen)) |
482 | return Nullgv; | |
dc848c6f | 483 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
484 | return Nullgv; | |
485 | cv = GvCV(gv); | |
486 | ||
adb5a9ae | 487 | if (!(CvROOT(cv) || CvXSUB(cv))) |
ed850460 JH |
488 | return Nullgv; |
489 | ||
dc848c6f | 490 | /* |
491 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
492 | */ | |
12bcd1a6 | 493 | if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && !method && |
599cee73 | 494 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
12bcd1a6 | 495 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
dc848c6f | 496 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
497 | HvNAME(stash), (int)len, name); | |
44a8e56a | 498 | |
4d1ff10f | 499 | #ifndef USE_5005THREADS |
adb5a9ae DM |
500 | if (CvXSUB(cv)) { |
501 | /* rather than lookup/init $AUTOLOAD here | |
502 | * only to have the XSUB do another lookup for $AUTOLOAD | |
503 | * and split that value on the last '::', | |
504 | * pass along the same data via some unused fields in the CV | |
505 | */ | |
506 | CvSTASH(cv) = stash; | |
0222aa7d | 507 | SvPVX(cv) = (char *)name; /* cast to lose constness warning */ |
adb5a9ae DM |
508 | SvCUR(cv) = len; |
509 | return gv; | |
510 | } | |
511 | #endif | |
512 | ||
44a8e56a | 513 | /* |
514 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
515 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
516 | * use that, but for lack of anything better we will use the sub's | |
517 | * original package to look up $AUTOLOAD. | |
518 | */ | |
519 | varstash = GvSTASH(CvGV(cv)); | |
520 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); | |
3d35f11b GS |
521 | ENTER; |
522 | ||
4d1ff10f | 523 | #ifdef USE_5005THREADS |
4755096e | 524 | sv_lock((SV *)varstash); |
3d35f11b | 525 | #endif |
44a8e56a | 526 | if (!isGV(vargv)) |
527 | gv_init(vargv, varstash, autoload, autolen, FALSE); | |
3d35f11b | 528 | LEAVE; |
44a8e56a | 529 | varsv = GvSV(vargv); |
4d1ff10f | 530 | #ifdef USE_5005THREADS |
4755096e | 531 | sv_lock(varsv); |
3d35f11b | 532 | #endif |
44a8e56a | 533 | sv_setpv(varsv, HvNAME(stash)); |
534 | sv_catpvn(varsv, "::", 2); | |
535 | sv_catpvn(varsv, name, len); | |
536 | SvTAINTED_off(varsv); | |
a0d0e21e LW |
537 | return gv; |
538 | } | |
539 | ||
d2c93421 RH |
540 | /* The "gv" parameter should be the glob known to Perl code as *! |
541 | * The scalar must already have been magicalized. | |
542 | */ | |
543 | STATIC void | |
544 | S_require_errno(pTHX_ GV *gv) | |
545 | { | |
546 | HV* stash = gv_stashpvn("Errno",5,FALSE); | |
547 | ||
548 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { | |
549 | dSP; | |
550 | PUTBACK; | |
551 | ENTER; | |
552 | save_scalar(gv); /* keep the value of $! */ | |
84f1fa11 AMS |
553 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, |
554 | newSVpvn("Errno",5), Nullsv); | |
d2c93421 RH |
555 | LEAVE; |
556 | SPAGAIN; | |
557 | stash = gv_stashpvn("Errno",5,FALSE); | |
558 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) | |
559 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); | |
560 | } | |
561 | } | |
562 | ||
954c1994 GS |
563 | /* |
564 | =for apidoc gv_stashpv | |
565 | ||
386d01d6 GS |
566 | Returns a pointer to the stash for a specified package. C<name> should |
567 | be a valid UTF-8 string. If C<create> is set then the package will be | |
568 | created if it does not already exist. If C<create> is not set and the | |
569 | package does not exist then NULL is returned. | |
954c1994 GS |
570 | |
571 | =cut | |
572 | */ | |
573 | ||
a0d0e21e | 574 | HV* |
864dbfa3 | 575 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 576 | { |
dc437b57 | 577 | return gv_stashpvn(name, strlen(name), create); |
578 | } | |
579 | ||
580 | HV* | |
864dbfa3 | 581 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
dc437b57 | 582 | { |
46fc3d4c | 583 | char smallbuf[256]; |
584 | char *tmpbuf; | |
a0d0e21e LW |
585 | HV *stash; |
586 | GV *tmpgv; | |
dc437b57 | 587 | |
46fc3d4c | 588 | if (namelen + 3 < sizeof smallbuf) |
589 | tmpbuf = smallbuf; | |
590 | else | |
591 | New(606, tmpbuf, namelen + 3, char); | |
dc437b57 | 592 | Copy(name,tmpbuf,namelen,char); |
593 | tmpbuf[namelen++] = ':'; | |
594 | tmpbuf[namelen++] = ':'; | |
595 | tmpbuf[namelen] = '\0'; | |
46fc3d4c | 596 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
597 | if (tmpbuf != smallbuf) | |
598 | Safefree(tmpbuf); | |
a0d0e21e LW |
599 | if (!tmpgv) |
600 | return 0; | |
601 | if (!GvHV(tmpgv)) | |
602 | GvHV(tmpgv) = newHV(); | |
603 | stash = GvHV(tmpgv); | |
604 | if (!HvNAME(stash)) | |
605 | HvNAME(stash) = savepv(name); | |
606 | return stash; | |
463ee0b2 LW |
607 | } |
608 | ||
954c1994 GS |
609 | /* |
610 | =for apidoc gv_stashsv | |
611 | ||
386d01d6 GS |
612 | Returns a pointer to the stash for a specified package, which must be a |
613 | valid UTF-8 string. See C<gv_stashpv>. | |
954c1994 GS |
614 | |
615 | =cut | |
616 | */ | |
617 | ||
a0d0e21e | 618 | HV* |
864dbfa3 | 619 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
a0d0e21e | 620 | { |
dc437b57 | 621 | register char *ptr; |
622 | STRLEN len; | |
623 | ptr = SvPV(sv,len); | |
624 | return gv_stashpvn(ptr, len, create); | |
a0d0e21e LW |
625 | } |
626 | ||
627 | ||
463ee0b2 | 628 | GV * |
864dbfa3 | 629 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
79072805 | 630 | { |
08105a92 | 631 | register const char *name = nambeg; |
463ee0b2 | 632 | register GV *gv = 0; |
79072805 | 633 | GV**gvp; |
79072805 | 634 | I32 len; |
08105a92 | 635 | register const char *namend; |
463ee0b2 | 636 | HV *stash = 0; |
79072805 | 637 | |
c07a80fd | 638 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
639 | name++; | |
640 | ||
79072805 | 641 | for (namend = name; *namend; namend++) { |
1d7c1841 GS |
642 | if ((*namend == ':' && namend[1] == ':') |
643 | || (*namend == '\'' && namend[1])) | |
463ee0b2 | 644 | { |
463ee0b2 | 645 | if (!stash) |
3280af22 | 646 | stash = PL_defstash; |
dc437b57 | 647 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e | 648 | return Nullgv; |
463ee0b2 | 649 | |
85e6fe83 LW |
650 | len = namend - name; |
651 | if (len > 0) { | |
3c78fafa | 652 | char smallbuf[256]; |
62b57502 | 653 | char *tmpbuf; |
62b57502 | 654 | |
25c09a70 | 655 | if (len + 3 < sizeof (smallbuf)) |
3c78fafa | 656 | tmpbuf = smallbuf; |
62b57502 MB |
657 | else |
658 | New(601, tmpbuf, len+3, char); | |
a0d0e21e LW |
659 | Copy(name, tmpbuf, len, char); |
660 | tmpbuf[len++] = ':'; | |
661 | tmpbuf[len++] = ':'; | |
662 | tmpbuf[len] = '\0'; | |
463ee0b2 | 663 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 | 664 | gv = gvp ? *gvp : Nullgv; |
3280af22 | 665 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 | 666 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 | 667 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 GS |
668 | else |
669 | GvMULTI_on(gv); | |
670 | } | |
3c78fafa | 671 | if (tmpbuf != smallbuf) |
62b57502 | 672 | Safefree(tmpbuf); |
3280af22 | 673 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e | 674 | return Nullgv; |
85e6fe83 | 675 | |
463ee0b2 LW |
676 | if (!(stash = GvHV(gv))) |
677 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 678 | |
463ee0b2 | 679 | if (!HvNAME(stash)) |
a0d0e21e | 680 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 LW |
681 | } |
682 | ||
683 | if (*namend == ':') | |
684 | namend++; | |
685 | namend++; | |
686 | name = namend; | |
687 | if (!*name) | |
3280af22 | 688 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 | 689 | } |
79072805 | 690 | } |
a0d0e21e LW |
691 | len = namend - name; |
692 | if (!len) | |
693 | len = 1; | |
463ee0b2 LW |
694 | |
695 | /* No stash in name, so see how we can default */ | |
696 | ||
697 | if (!stash) { | |
7e2040f0 | 698 | if (isIDFIRST_lazy(name)) { |
9607fc9c | 699 | bool global = FALSE; |
700 | ||
463ee0b2 | 701 | if (isUPPER(*name)) { |
9d116dd7 JH |
702 | if (*name == 'S' && ( |
703 | strEQ(name, "SIG") || | |
704 | strEQ(name, "STDIN") || | |
705 | strEQ(name, "STDOUT") || | |
706 | strEQ(name, "STDERR"))) | |
707 | global = TRUE; | |
708 | else if (*name == 'I' && strEQ(name, "INC")) | |
709 | global = TRUE; | |
710 | else if (*name == 'E' && strEQ(name, "ENV")) | |
711 | global = TRUE; | |
463ee0b2 LW |
712 | else if (*name == 'A' && ( |
713 | strEQ(name, "ARGV") || | |
9d116dd7 | 714 | strEQ(name, "ARGVOUT"))) |
463ee0b2 LW |
715 | global = TRUE; |
716 | } | |
c99da370 | 717 | else if (*name == '_' && !name[1]) |
463ee0b2 | 718 | global = TRUE; |
9607fc9c | 719 | |
463ee0b2 | 720 | if (global) |
3280af22 NIS |
721 | stash = PL_defstash; |
722 | else if ((COP*)PL_curcop == &PL_compiling) { | |
723 | stash = PL_curstash; | |
724 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
748a9306 LW |
725 | sv_type != SVt_PVCV && |
726 | sv_type != SVt_PVGV && | |
4633a7c4 | 727 | sv_type != SVt_PVFM && |
c07a80fd | 728 | sv_type != SVt_PVIO && |
377b8fbc | 729 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 | 730 | { |
4633a7c4 LW |
731 | gvp = (GV**)hv_fetch(stash,name,len,0); |
732 | if (!gvp || | |
3280af22 | 733 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 AD |
734 | SvTYPE(*gvp) != SVt_PVGV) |
735 | { | |
4633a7c4 | 736 | stash = 0; |
a5f75d66 | 737 | } |
155aba94 GS |
738 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
739 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
740 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
4633a7c4 | 741 | { |
cea2e8a9 | 742 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
4633a7c4 LW |
743 | sv_type == SVt_PVAV ? '@' : |
744 | sv_type == SVt_PVHV ? '%' : '$', | |
745 | name); | |
8ebc5c01 | 746 | if (GvCVu(*gvp)) |
cc507455 | 747 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
a0d0e21e | 748 | stash = 0; |
4633a7c4 | 749 | } |
a0d0e21e | 750 | } |
85e6fe83 | 751 | } |
463ee0b2 | 752 | else |
1d7c1841 | 753 | stash = CopSTASH(PL_curcop); |
463ee0b2 LW |
754 | } |
755 | else | |
3280af22 | 756 | stash = PL_defstash; |
463ee0b2 LW |
757 | } |
758 | ||
759 | /* By this point we should have a stash and a name */ | |
760 | ||
a0d0e21e | 761 | if (!stash) { |
5a844595 GS |
762 | if (add) { |
763 | qerror(Perl_mess(aTHX_ | |
764 | "Global symbol \"%s%s\" requires explicit package name", | |
765 | (sv_type == SVt_PV ? "$" | |
766 | : sv_type == SVt_PVAV ? "@" | |
767 | : sv_type == SVt_PVHV ? "%" | |
768 | : ""), name)); | |
f180df80 | 769 | stash = PL_nullstash; |
a0d0e21e | 770 | } |
f180df80 GS |
771 | else |
772 | return Nullgv; | |
a0d0e21e LW |
773 | } |
774 | ||
775 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
776 | return Nullgv; | |
777 | ||
79072805 | 778 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 | 779 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 LW |
780 | return Nullgv; |
781 | gv = *gvp; | |
782 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e | 783 | if (add) { |
a5f75d66 | 784 | GvMULTI_on(gv); |
a0d0e21e | 785 | gv_init_sv(gv, sv_type); |
d2c93421 RH |
786 | if (*name=='!' && sv_type == SVt_PVHV && len==1) |
787 | require_errno(gv); | |
a0d0e21e | 788 | } |
79072805 | 789 | return gv; |
55d729e4 GS |
790 | } else if (add & GV_NOINIT) { |
791 | return gv; | |
79072805 | 792 | } |
93a17b20 LW |
793 | |
794 | /* Adding a new symbol */ | |
795 | ||
0453d815 | 796 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
9014280d | 797 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); |
55d729e4 | 798 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e | 799 | gv_init_sv(gv, sv_type); |
93a17b20 | 800 | |
7272584d PM |
801 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
802 | : (PL_dowarn & G_WARN_ON ) ) ) | |
0453d815 PM |
803 | GvMULTI_on(gv) ; |
804 | ||
93a17b20 LW |
805 | /* set up magic where warranted */ |
806 | switch (*name) { | |
a0d0e21e LW |
807 | case 'A': |
808 | if (strEQ(name, "ARGV")) { | |
809 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
810 | } | |
811 | break; | |
a0d0e21e LW |
812 | case 'E': |
813 | if (strnEQ(name, "EXPORT", 6)) | |
a5f75d66 | 814 | GvMULTI_on(gv); |
a0d0e21e | 815 | break; |
463ee0b2 LW |
816 | case 'I': |
817 | if (strEQ(name, "ISA")) { | |
818 | AV* av = GvAVn(gv); | |
a5f75d66 | 819 | GvMULTI_on(gv); |
14befaf4 | 820 | sv_magic((SV*)av, (SV*)gv, PERL_MAGIC_isa, Nullch, 0); |
93965878 | 821 | /* NOTE: No support for tied ISA */ |
55d729e4 GS |
822 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
823 | && AvFILLp(av) == -1) | |
85e6fe83 | 824 | { |
a0d0e21e | 825 | char *pname; |
79cb57f6 | 826 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
dc437b57 | 827 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 | 828 | av_push(av, newSVpvn(pname = "DB_File",7)); |
dc437b57 | 829 | gv_stashpvn(pname, 7, TRUE); |
79cb57f6 | 830 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
dc437b57 | 831 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 | 832 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
dc437b57 | 833 | gv_stashpvn(pname, 9, TRUE); |
79cb57f6 | 834 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
dc437b57 | 835 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 | 836 | } |
463ee0b2 LW |
837 | } |
838 | break; | |
a0d0e21e LW |
839 | case 'O': |
840 | if (strEQ(name, "OVERLOAD")) { | |
841 | HV* hv = GvHVn(gv); | |
a5f75d66 | 842 | GvMULTI_on(gv); |
14befaf4 | 843 | hv_magic(hv, Nullgv, PERL_MAGIC_overload); |
a0d0e21e LW |
844 | } |
845 | break; | |
93a17b20 LW |
846 | case 'S': |
847 | if (strEQ(name, "SIG")) { | |
848 | HV *hv; | |
dc437b57 | 849 | I32 i; |
1d7c1841 | 850 | if (!PL_psig_ptr) { |
0a8e0eff NIS |
851 | Newz(73, PL_psig_ptr, SIG_SIZE, SV*); |
852 | Newz(73, PL_psig_name, SIG_SIZE, SV*); | |
853 | Newz(73, PL_psig_pend, SIG_SIZE, int); | |
1d7c1841 GS |
854 | } |
855 | GvMULTI_on(gv); | |
856 | hv = GvHVn(gv); | |
14befaf4 | 857 | hv_magic(hv, Nullgv, PERL_MAGIC_sig); |
76d3c696 | 858 | for (i = 1; i < SIG_SIZE; i++) { |
dc437b57 | 859 | SV ** init; |
1d7c1841 GS |
860 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
861 | if (init) | |
862 | sv_setsv(*init, &PL_sv_undef); | |
22c35a8c GS |
863 | PL_psig_ptr[i] = 0; |
864 | PL_psig_name[i] = 0; | |
0a8e0eff | 865 | PL_psig_pend[i] = 0; |
dc437b57 | 866 | } |
93a17b20 LW |
867 | } |
868 | break; | |
09bef843 SB |
869 | case 'V': |
870 | if (strEQ(name, "VERSION")) | |
871 | GvMULTI_on(gv); | |
872 | break; | |
93a17b20 LW |
873 | |
874 | case '&': | |
93a17b20 | 875 | case '`': |
93a17b20 | 876 | case '\'': |
b4a9608f JP |
877 | if ( |
878 | len > 1 || | |
879 | sv_type == SVt_PVAV || | |
880 | sv_type == SVt_PVHV || | |
881 | sv_type == SVt_PVCV || | |
b4a9608f JP |
882 | sv_type == SVt_PVFM || |
883 | sv_type == SVt_PVIO | |
884 | ) { break; } | |
3280af22 | 885 | PL_sawampersand = TRUE; |
a0d0e21e | 886 | goto ro_magicalize; |
93a17b20 LW |
887 | |
888 | case ':': | |
463ee0b2 LW |
889 | if (len > 1) |
890 | break; | |
3280af22 | 891 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 LW |
892 | goto magicalize; |
893 | ||
ff0cee69 | 894 | case '?': |
895 | if (len > 1) | |
896 | break; | |
897 | #ifdef COMPLEX_STATUS | |
07f14f54 | 898 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
ff0cee69 | 899 | #endif |
900 | goto magicalize; | |
901 | ||
067391ea | 902 | case '!': |
4318d5a0 | 903 | if (len > 1) |
067391ea | 904 | break; |
d2c93421 RH |
905 | |
906 | /* If %! has been used, automatically load Errno.pm. | |
907 | The require will itself set errno, so in order to | |
908 | preserve its value we have to set up the magic | |
909 | now (rather than going to magicalize) | |
910 | */ | |
911 | ||
14befaf4 | 912 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
d2c93421 RH |
913 | |
914 | if (sv_type == SVt_PVHV) | |
915 | require_errno(gv); | |
916 | ||
917 | break; | |
6cef1e77 IZ |
918 | case '-': |
919 | if (len > 1) | |
920 | break; | |
921 | else { | |
922 | AV* av = GvAVn(gv); | |
14befaf4 | 923 | sv_magic((SV*)av, Nullsv, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 | 924 | SvREADONLY_on(av); |
6cef1e77 IZ |
925 | } |
926 | goto magicalize; | |
93a17b20 | 927 | case '#': |
a0d0e21e | 928 | case '*': |
12bcd1a6 PM |
929 | if (ckWARN2(WARN_DEPRECATED, WARN_SYNTAX) && len == 1 && sv_type == SVt_PV) |
930 | Perl_warner(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), "Use of $%s is deprecated", name); | |
a0d0e21e LW |
931 | /* FALL THROUGH */ |
932 | case '[': | |
93a17b20 LW |
933 | case '^': |
934 | case '~': | |
935 | case '=': | |
93a17b20 LW |
936 | case '%': |
937 | case '.': | |
93a17b20 LW |
938 | case '(': |
939 | case ')': | |
940 | case '<': | |
941 | case '>': | |
942 | case ',': | |
943 | case '\\': | |
944 | case '/': | |
16070b82 GS |
945 | case '\001': /* $^A */ |
946 | case '\003': /* $^C */ | |
947 | case '\004': /* $^D */ | |
16070b82 GS |
948 | case '\006': /* $^F */ |
949 | case '\010': /* $^H */ | |
950 | case '\011': /* $^I, NOT \t in EBCDIC */ | |
a01268b5 | 951 | case '\016': /* $^N */ |
16070b82 | 952 | case '\020': /* $^P */ |
463ee0b2 LW |
953 | if (len > 1) |
954 | break; | |
955 | goto magicalize; | |
d8ce0c9a BH |
956 | case '|': |
957 | if (len > 1) | |
958 | break; | |
959 | sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); | |
960 | goto magicalize; | |
0a378802 JH |
961 | case '\005': /* $^E && $^ENCODING */ |
962 | if (len > 1 && strNE(name, "\005NCODING")) | |
963 | break; | |
964 | goto magicalize; | |
965 | ||
ac27b0f5 NIS |
966 | case '\017': /* $^O & $^OPEN */ |
967 | if (len > 1 && strNE(name, "\017PEN")) | |
968 | break; | |
969 | goto magicalize; | |
16070b82 | 970 | case '\023': /* $^S */ |
6cef1e77 IZ |
971 | if (len > 1) |
972 | break; | |
973 | goto ro_magicalize; | |
eb27b65e | 974 | case '\024': /* $^T, ${^TAINT} */ |
7c36658b MS |
975 | if (len == 1) |
976 | goto magicalize; | |
977 | else if (strEQ(name, "\024AINT")) | |
978 | goto ro_magicalize; | |
979 | else | |
980 | break; | |
6a818117 | 981 | case '\027': /* $^W & $^WARNING_BITS */ |
a50e31ad GS |
982 | if (len > 1 && strNE(name, "\027ARNING_BITS") |
983 | && strNE(name, "\027IDE_SYSTEM_CALLS")) | |
4438c4b7 JH |
984 | break; |
985 | goto magicalize; | |
463ee0b2 | 986 | |
a0d0e21e | 987 | case '+': |
6cef1e77 IZ |
988 | if (len > 1) |
989 | break; | |
990 | else { | |
991 | AV* av = GvAVn(gv); | |
14befaf4 | 992 | sv_magic((SV*)av, (SV*)av, PERL_MAGIC_regdata, Nullch, 0); |
03a27ae7 | 993 | SvREADONLY_on(av); |
6cef1e77 IZ |
994 | } |
995 | /* FALL THROUGH */ | |
463ee0b2 LW |
996 | case '1': |
997 | case '2': | |
998 | case '3': | |
999 | case '4': | |
1000 | case '5': | |
1001 | case '6': | |
1002 | case '7': | |
1003 | case '8': | |
1004 | case '9': | |
e521374c JP |
1005 | /* ensures variable is only digits */ |
1006 | /* ${"1foo"} fails this test (and is thus writeable) */ | |
1007 | /* added by japhy, but borrowed from is_gv_magical */ | |
1008 | ||
1009 | if (len > 1) { | |
1010 | const char *end = name + len; | |
1011 | while (--end > name) { | |
1012 | if (!isDIGIT(*end)) return gv; | |
1013 | } | |
1014 | } | |
1015 | ||
a0d0e21e LW |
1016 | ro_magicalize: |
1017 | SvREADONLY_on(GvSV(gv)); | |
93a17b20 | 1018 | magicalize: |
14befaf4 | 1019 | sv_magic(GvSV(gv), (SV*)gv, PERL_MAGIC_sv, name, len); |
93a17b20 LW |
1020 | break; |
1021 | ||
16070b82 | 1022 | case '\014': /* $^L */ |
463ee0b2 LW |
1023 | if (len > 1) |
1024 | break; | |
93a17b20 | 1025 | sv_setpv(GvSV(gv),"\f"); |
3280af22 | 1026 | PL_formfeed = GvSV(gv); |
93a17b20 LW |
1027 | break; |
1028 | case ';': | |
463ee0b2 LW |
1029 | if (len > 1) |
1030 | break; | |
93a17b20 LW |
1031 | sv_setpv(GvSV(gv),"\034"); |
1032 | break; | |
463ee0b2 LW |
1033 | case ']': |
1034 | if (len == 1) { | |
f86702cc | 1035 | SV *sv = GvSV(gv); |
5089c844 | 1036 | (void)SvUPGRADE(sv, SVt_PVNV); |
6a6ba966 SB |
1037 | Perl_sv_setpvf(aTHX_ sv, |
1038 | #if defined(PERL_SUBVERSION) && (PERL_SUBVERSION > 0) | |
1039 | "%8.6" | |
1040 | #else | |
1041 | "%5.3" | |
1042 | #endif | |
1043 | NVff, | |
1044 | SvNVX(PL_patchlevel)); | |
5089c844 GS |
1045 | SvNVX(sv) = SvNVX(PL_patchlevel); |
1046 | SvNOK_on(sv); | |
5089c844 | 1047 | SvREADONLY_on(sv); |
93a17b20 LW |
1048 | } |
1049 | break; | |
16070b82 GS |
1050 | case '\026': /* $^V */ |
1051 | if (len == 1) { | |
1052 | SV *sv = GvSV(gv); | |
1053 | GvSV(gv) = SvREFCNT_inc(PL_patchlevel); | |
1054 | SvREFCNT_dec(sv); | |
1055 | } | |
1056 | break; | |
79072805 | 1057 | } |
93a17b20 | 1058 | return gv; |
79072805 LW |
1059 | } |
1060 | ||
1061 | void | |
43693395 GS |
1062 | Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
1063 | { | |
1064 | HV *hv = GvSTASH(gv); | |
1065 | if (!hv) { | |
1066 | (void)SvOK_off(sv); | |
1067 | return; | |
1068 | } | |
1069 | sv_setpv(sv, prefix ? prefix : ""); | |
1070 | if (keepmain || strNE(HvNAME(hv), "main")) { | |
1071 | sv_catpv(sv,HvNAME(hv)); | |
1072 | sv_catpvn(sv,"::", 2); | |
1073 | } | |
1074 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); | |
1075 | } | |
1076 | ||
1077 | void | |
864dbfa3 | 1078 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 LW |
1079 | { |
1080 | HV *hv = GvSTASH(gv); | |
f967eb5f | 1081 | if (!hv) { |
155aba94 | 1082 | (void)SvOK_off(sv); |
79072805 | 1083 | return; |
f967eb5f | 1084 | } |
1085 | sv_setpv(sv, prefix ? prefix : ""); | |
79072805 | 1086 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 | 1087 | sv_catpvn(sv,"::", 2); |
79072805 LW |
1088 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
1089 | } | |
1090 | ||
1091 | void | |
43693395 GS |
1092 | Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
1093 | { | |
1094 | GV *egv = GvEGV(gv); | |
1095 | if (!egv) | |
1096 | egv = gv; | |
1097 | gv_fullname4(sv, egv, prefix, keepmain); | |
1098 | } | |
1099 | ||
1100 | void | |
864dbfa3 | 1101 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
79072805 | 1102 | { |
f967eb5f | 1103 | GV *egv = GvEGV(gv); |
748a9306 LW |
1104 | if (!egv) |
1105 | egv = gv; | |
f6aff53a | 1106 | gv_fullname3(sv, egv, prefix); |
1107 | } | |
1108 | ||
1109 | /* XXX compatibility with versions <= 5.003. */ | |
1110 | void | |
864dbfa3 | 1111 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
f6aff53a | 1112 | { |
1113 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); | |
1114 | } | |
1115 | ||
1116 | /* XXX compatibility with versions <= 5.003. */ | |
1117 | void | |
864dbfa3 | 1118 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
f6aff53a | 1119 | { |
1120 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); | |
79072805 LW |
1121 | } |
1122 | ||
1123 | IO * | |
864dbfa3 | 1124 | Perl_newIO(pTHX) |
79072805 LW |
1125 | { |
1126 | IO *io; | |
8990e307 LW |
1127 | GV *iogv; |
1128 | ||
1129 | io = (IO*)NEWSV(0,0); | |
a0d0e21e | 1130 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 LW |
1131 | SvREFCNT(io) = 1; |
1132 | SvOBJECT_on(io); | |
c9de509e | 1133 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
5f2d631d GS |
1134 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
1135 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) | |
c9de509e | 1136 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 | 1137 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 LW |
1138 | return io; |
1139 | } | |
1140 | ||
1141 | void | |
864dbfa3 | 1142 | Perl_gv_check(pTHX_ HV *stash) |
79072805 LW |
1143 | { |
1144 | register HE *entry; | |
1145 | register I32 i; | |
1146 | register GV *gv; | |
463ee0b2 LW |
1147 | HV *hv; |
1148 | ||
8990e307 LW |
1149 | if (!HvARRAY(stash)) |
1150 | return; | |
a0d0e21e | 1151 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 | 1152 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
1153 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && | |
6676db26 | 1154 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv))) |
a0d0e21e | 1155 | { |
19b6c847 | 1156 | if (hv != PL_defstash && hv != stash) |
a0d0e21e LW |
1157 | gv_check(hv); /* nested package */ |
1158 | } | |
dc437b57 | 1159 | else if (isALPHA(*HeKEY(entry))) { |
1d7c1841 | 1160 | char *file; |
dc437b57 | 1161 | gv = (GV*)HeVAL(entry); |
55d729e4 | 1162 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 1163 | continue; |
1d7c1841 GS |
1164 | file = GvFILE(gv); |
1165 | /* performance hack: if filename is absolute and it's a standard | |
1166 | * module, don't bother warning */ | |
1167 | if (file | |
1168 | && PERL_FILE_IS_ABSOLUTE(file) | |
6eb630b7 CN |
1169 | #ifdef MACOS_TRADITIONAL |
1170 | && (instr(file, ":lib:") | |
1171 | #else | |
1172 | && (instr(file, "/lib/") | |
1173 | #endif | |
1174 | || instr(file, ".pm"))) | |
1d7c1841 | 1175 | { |
8990e307 | 1176 | continue; |
1d7c1841 GS |
1177 | } |
1178 | CopLINE_set(PL_curcop, GvLINE(gv)); | |
1179 | #ifdef USE_ITHREADS | |
1180 | CopFILE(PL_curcop) = file; /* set for warning */ | |
1181 | #else | |
1182 | CopFILEGV(PL_curcop) = gv_fetchfile(file); | |
1183 | #endif | |
9014280d | 1184 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 | 1185 | "Name \"%s::%s\" used only once: possible typo", |
a0d0e21e | 1186 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 | 1187 | } |
79072805 LW |
1188 | } |
1189 | } | |
1190 | } | |
1191 | ||
1192 | GV * | |
864dbfa3 | 1193 | Perl_newGVgen(pTHX_ char *pack) |
79072805 | 1194 | { |
cea2e8a9 | 1195 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c | 1196 | TRUE, SVt_PVGV); |
79072805 LW |
1197 | } |
1198 | ||
1199 | /* hopefully this is only called on local symbol table entries */ | |
1200 | ||
1201 | GP* | |
864dbfa3 | 1202 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 1203 | { |
1d7c1841 GS |
1204 | if (!gp) |
1205 | return (GP*)NULL; | |
79072805 | 1206 | gp->gp_refcnt++; |
44a8e56a | 1207 | if (gp->gp_cv) { |
1208 | if (gp->gp_cvgen) { | |
1209 | /* multi-named GPs cannot be used for method cache */ | |
1210 | SvREFCNT_dec(gp->gp_cv); | |
1211 | gp->gp_cv = Nullcv; | |
1212 | gp->gp_cvgen = 0; | |
1213 | } | |
1214 | else { | |
1215 | /* Adding a new name to a subroutine invalidates method cache */ | |
3280af22 | 1216 | PL_sub_generation++; |
44a8e56a | 1217 | } |
1218 | } | |
79072805 | 1219 | return gp; |
79072805 LW |
1220 | } |
1221 | ||
1222 | void | |
864dbfa3 | 1223 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 1224 | { |
79072805 LW |
1225 | GP* gp; |
1226 | ||
1227 | if (!gv || !(gp = GvGP(gv))) | |
1228 | return; | |
f248d071 GS |
1229 | if (gp->gp_refcnt == 0) { |
1230 | if (ckWARN_d(WARN_INTERNAL)) | |
9014280d | 1231 | Perl_warner(aTHX_ packWARN(WARN_INTERNAL), |
f248d071 | 1232 | "Attempt to free unreferenced glob pointers"); |
79072805 LW |
1233 | return; |
1234 | } | |
44a8e56a | 1235 | if (gp->gp_cv) { |
1236 | /* Deleting the name of a subroutine invalidates method cache */ | |
3280af22 | 1237 | PL_sub_generation++; |
44a8e56a | 1238 | } |
748a9306 LW |
1239 | if (--gp->gp_refcnt > 0) { |
1240 | if (gp->gp_egv == gv) | |
1241 | gp->gp_egv = 0; | |
79072805 | 1242 | return; |
748a9306 | 1243 | } |
79072805 | 1244 | |
8990e307 LW |
1245 | SvREFCNT_dec(gp->gp_sv); |
1246 | SvREFCNT_dec(gp->gp_av); | |
1247 | SvREFCNT_dec(gp->gp_hv); | |
377b8fbc | 1248 | SvREFCNT_dec(gp->gp_io); |
a6006777 | 1249 | SvREFCNT_dec(gp->gp_cv); |
748a9306 LW |
1250 | SvREFCNT_dec(gp->gp_form); |
1251 | ||
79072805 LW |
1252 | Safefree(gp); |
1253 | GvGP(gv) = 0; | |
1254 | } | |
1255 | ||
d460ef45 NIS |
1256 | int |
1257 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
1258 | { | |
1259 | AMT *amtp = (AMT*)mg->mg_ptr; | |
1260 | if (amtp && AMT_AMAGIC(amtp)) { | |
1261 | int i; | |
1262 | for (i = 1; i < NofAMmeth; i++) { | |
1263 | CV *cv = amtp->table[i]; | |
1264 | if (cv != Nullcv) { | |
1265 | SvREFCNT_dec((SV *) cv); | |
1266 | amtp->table[i] = Nullcv; | |
1267 | } | |
1268 | } | |
1269 | } | |
1270 | return 0; | |
1271 | } | |
1272 | ||
a0d0e21e LW |
1273 | /* Updates and caches the CV's */ |
1274 | ||
1275 | bool | |
864dbfa3 | 1276 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
a0d0e21e | 1277 | { |
a0d0e21e LW |
1278 | GV* gv; |
1279 | CV* cv; | |
14befaf4 | 1280 | MAGIC* mg=mg_find((SV*)stash, PERL_MAGIC_overload_table); |
8ac85365 | 1281 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 | 1282 | AMT amt; |
a0d0e21e | 1283 | |
3280af22 NIS |
1284 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1285 | && amtp->was_ok_sub == PL_sub_generation) | |
eb160463 | 1286 | return (bool)AMT_OVERLOADED(amtp); |
14befaf4 | 1287 | sv_unmagic((SV*)stash, PERL_MAGIC_overload_table); |
a0d0e21e | 1288 | |
cea2e8a9 | 1289 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
a0d0e21e | 1290 | |
d460ef45 | 1291 | Zero(&amt,1,AMT); |
3280af22 NIS |
1292 | amt.was_ok_am = PL_amagic_generation; |
1293 | amt.was_ok_sub = PL_sub_generation; | |
a6006777 | 1294 | amt.fallback = AMGfallNO; |
1295 | amt.flags = 0; | |
1296 | ||
a6006777 | 1297 | { |
32251b26 IZ |
1298 | int filled = 0, have_ovl = 0; |
1299 | int i, lim = 1; | |
a6006777 | 1300 | SV* sv = NULL; |
a6006777 | 1301 | |
22c35a8c | 1302 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 1303 | |
89ffc314 IZ |
1304 | /* Try to find via inheritance. */ |
1305 | gv = gv_fetchmeth(stash, PL_AMG_names[0], 2, -1); | |
1306 | if (gv) | |
1307 | sv = GvSV(gv); | |
1308 | ||
1309 | if (!gv) | |
32251b26 | 1310 | lim = DESTROY_amg; /* Skip overloading entries. */ |
89ffc314 IZ |
1311 | else if (SvTRUE(sv)) |
1312 | amt.fallback=AMGfallYES; | |
1313 | else if (SvOK(sv)) | |
1314 | amt.fallback=AMGfallNEVER; | |
a6006777 | 1315 | |
32251b26 IZ |
1316 | for (i = 1; i < lim; i++) |
1317 | amt.table[i] = Nullcv; | |
1318 | for (; i < NofAMmeth; i++) { | |
c8ce92fc | 1319 | char *cooky = (char*)PL_AMG_names[i]; |
32251b26 IZ |
1320 | /* Human-readable form, for debugging: */ |
1321 | char *cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); | |
89ffc314 IZ |
1322 | STRLEN l = strlen(cooky); |
1323 | ||
cea2e8a9 | 1324 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
44a8e56a | 1325 | cp, HvNAME(stash)) ); |
611c1e95 IZ |
1326 | /* don't fill the cache while looking up! |
1327 | Creation of inheritance stubs in intermediate packages may | |
1328 | conflict with the logic of runtime method substitution. | |
1329 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
1330 | then we could have created stubs for "(+0" in A and C too. | |
1331 | But if B overloads "bool", we may want to use it for | |
1332 | numifying instead of C's "+0". */ | |
1333 | if (i >= DESTROY_amg) | |
1334 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); | |
1335 | else /* Autoload taken care of below */ | |
1336 | gv = Perl_gv_fetchmeth(aTHX_ stash, cooky, l, -1); | |
46fc3d4c | 1337 | cv = 0; |
89ffc314 | 1338 | if (gv && (cv = GvCV(gv))) { |
44a8e56a | 1339 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1340 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { | |
611c1e95 IZ |
1341 | /* This is a hack to support autoloading..., while |
1342 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 1343 | /* GvSV contains the name of the method. */ |
4ea42e7f | 1344 | GV *ngv = Nullgv; |
44a8e56a | 1345 | |
b267980d | 1346 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
9c5ffd7c | 1347 | SvPV_nolen(GvSV(gv)), cp, HvNAME(stash)) ); |
b267980d | 1348 | if (!SvPOK(GvSV(gv)) |
dc848c6f | 1349 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1350 | FALSE))) | |
1351 | { | |
44a8e56a | 1352 | /* Can be an import stub (created by `can'). */ |
1353 | if (GvCVGEN(gv)) { | |
b267980d | 1354 | Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a | 1355 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1356 | cp, HvNAME(stash)); | |
1357 | } else | |
b267980d | 1358 | Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", |
44a8e56a | 1359 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1360 | cp, HvNAME(stash)); | |
1361 | } | |
dc848c6f | 1362 | cv = GvCV(gv = ngv); |
44a8e56a | 1363 | } |
cea2e8a9 | 1364 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
44a8e56a | 1365 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1366 | GvNAME(CvGV(cv))) ); | |
1367 | filled = 1; | |
32251b26 IZ |
1368 | if (i < DESTROY_amg) |
1369 | have_ovl = 1; | |
611c1e95 IZ |
1370 | } else if (gv) { /* Autoloaded... */ |
1371 | cv = (CV*)gv; | |
1372 | filled = 1; | |
44a8e56a | 1373 | } |
a6006777 | 1374 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e | 1375 | } |
a0d0e21e | 1376 | if (filled) { |
a6006777 | 1377 | AMT_AMAGIC_on(&amt); |
32251b26 IZ |
1378 | if (have_ovl) |
1379 | AMT_OVERLOADED_on(&amt); | |
14befaf4 DM |
1380 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1381 | (char*)&amt, sizeof(AMT)); | |
32251b26 | 1382 | return have_ovl; |
a0d0e21e LW |
1383 | } |
1384 | } | |
a6006777 | 1385 | /* Here we have no table: */ |
9cbac4c7 | 1386 | /* no_table: */ |
a6006777 | 1387 | AMT_AMAGIC_off(&amt); |
14befaf4 DM |
1388 | sv_magic((SV*)stash, 0, PERL_MAGIC_overload_table, |
1389 | (char*)&amt, sizeof(AMTS)); | |
a0d0e21e LW |
1390 | return FALSE; |
1391 | } | |
1392 | ||
32251b26 IZ |
1393 | |
1394 | CV* | |
1395 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
1396 | { | |
3f8f4626 | 1397 | MAGIC *mg; |
32251b26 | 1398 | AMT *amtp; |
3ad83ce7 | 1399 | CV *ret; |
32251b26 | 1400 | |
3f8f4626 DC |
1401 | if (!stash) |
1402 | return Nullcv; | |
14befaf4 | 1403 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
1404 | if (!mg) { |
1405 | do_update: | |
1406 | Gv_AMupdate(stash); | |
14befaf4 | 1407 | mg = mg_find((SV*)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
1408 | } |
1409 | amtp = (AMT*)mg->mg_ptr; | |
1410 | if ( amtp->was_ok_am != PL_amagic_generation | |
1411 | || amtp->was_ok_sub != PL_sub_generation ) | |
1412 | goto do_update; | |
3ad83ce7 AMS |
1413 | if (AMT_AMAGIC(amtp)) { |
1414 | ret = amtp->table[id]; | |
1415 | if (ret && isGV(ret)) { /* Autoloading stab */ | |
1416 | /* Passing it through may have resulted in a warning | |
1417 | "Inherited AUTOLOAD for a non-method deprecated", since | |
1418 | our caller is going through a function call, not a method call. | |
1419 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
1420 | GV *gv = gv_fetchmethod(stash, (char*)PL_AMG_names[id]); | |
1421 | ||
1422 | if (gv && GvCV(gv)) | |
1423 | return GvCV(gv); | |
1424 | } | |
1425 | return ret; | |
1426 | } | |
1427 | ||
32251b26 IZ |
1428 | return Nullcv; |
1429 | } | |
1430 | ||
1431 | ||
a0d0e21e | 1432 | SV* |
864dbfa3 | 1433 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 1434 | { |
b267980d | 1435 | MAGIC *mg; |
9c5ffd7c | 1436 | CV *cv=NULL; |
a0d0e21e | 1437 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 1438 | AMT *amtp=NULL, *oamtp=NULL; |
497b47a8 | 1439 | int off=0, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
ee239bfe | 1440 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
497b47a8 JH |
1441 | #ifdef DEBUGGING |
1442 | int fl=0; | |
497b47a8 | 1443 | #endif |
25716404 | 1444 | HV* stash=NULL; |
a0d0e21e | 1445 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 GS |
1446 | && (stash = SvSTASH(SvRV(left))) |
1447 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1448 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1449 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 | 1450 | : (CV **) NULL)) |
b267980d | 1451 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
1452 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1453 | * usual method */ | |
497b47a8 JH |
1454 | ( |
1455 | #ifdef DEBUGGING | |
1456 | fl = 1, | |
1457 | #endif | |
1458 | cv = cvp[off=method])))) { | |
a0d0e21e LW |
1459 | lr = -1; /* Call method for left argument */ |
1460 | } else { | |
1461 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
1462 | int logic; | |
1463 | ||
1464 | /* look for substituted methods */ | |
ee239bfe | 1465 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
1466 | switch (method) { |
1467 | case inc_amg: | |
ee239bfe IZ |
1468 | force_cpy = 1; |
1469 | if ((cv = cvp[off=add_ass_amg]) | |
1470 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 1471 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1472 | } |
1473 | break; | |
1474 | case dec_amg: | |
ee239bfe IZ |
1475 | force_cpy = 1; |
1476 | if ((cv = cvp[off = subtr_ass_amg]) | |
1477 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 1478 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
1479 | } |
1480 | break; | |
1481 | case bool__amg: | |
1482 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
1483 | break; | |
1484 | case numer_amg: | |
1485 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
1486 | break; | |
1487 | case string_amg: | |
1488 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
1489 | break; | |
dc437b57 | 1490 | case not_amg: |
b267980d | 1491 | (void)((cv = cvp[off=bool__amg]) |
dc437b57 | 1492 | || (cv = cvp[off=numer_amg]) |
1493 | || (cv = cvp[off=string_amg])); | |
1494 | postpr = 1; | |
1495 | break; | |
748a9306 LW |
1496 | case copy_amg: |
1497 | { | |
76e3520e GS |
1498 | /* |
1499 | * SV* ref causes confusion with the interpreter variable of | |
1500 | * the same name | |
1501 | */ | |
1502 | SV* tmpRef=SvRV(left); | |
1503 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { | |
fc36a67e | 1504 | /* |
1505 | * Just to be extra cautious. Maybe in some | |
1506 | * additional cases sv_setsv is safe, too. | |
1507 | */ | |
76e3520e | 1508 | SV* newref = newSVsv(tmpRef); |
748a9306 | 1509 | SvOBJECT_on(newref); |
76e3520e | 1510 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 LW |
1511 | return newref; |
1512 | } | |
1513 | } | |
1514 | break; | |
a0d0e21e | 1515 | case abs_amg: |
b267980d | 1516 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 1517 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 | 1518 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 1519 | if (off1==lt_amg) { |
748a9306 | 1520 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1521 | lt_amg,AMGf_noright); |
1522 | logic = SvTRUE(lessp); | |
1523 | } else { | |
748a9306 | 1524 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1525 | ncmp_amg,AMGf_noright); |
1526 | logic = (SvNV(lessp) < 0); | |
1527 | } | |
1528 | if (logic) { | |
1529 | if (off==subtr_amg) { | |
1530 | right = left; | |
748a9306 | 1531 | left = nullsv; |
a0d0e21e LW |
1532 | lr = 1; |
1533 | } | |
1534 | } else { | |
1535 | return left; | |
1536 | } | |
1537 | } | |
1538 | break; | |
1539 | case neg_amg: | |
155aba94 | 1540 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
1541 | right = left; |
1542 | left = sv_2mortal(newSViv(0)); | |
1543 | lr = 1; | |
1544 | } | |
1545 | break; | |
f216259d | 1546 | case int_amg: |
f5284f61 | 1547 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
b267980d NIS |
1548 | /* FAIL safe */ |
1549 | return NULL; /* Delegate operation to standard mechanisms. */ | |
1550 | break; | |
f5284f61 IZ |
1551 | case to_sv_amg: |
1552 | case to_av_amg: | |
1553 | case to_hv_amg: | |
1554 | case to_gv_amg: | |
1555 | case to_cv_amg: | |
1556 | /* FAIL safe */ | |
b267980d | 1557 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 | 1558 | break; |
a0d0e21e LW |
1559 | default: |
1560 | goto not_found; | |
1561 | } | |
1562 | if (!cv) goto not_found; | |
1563 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
25716404 GS |
1564 | && (stash = SvSTASH(SvRV(right))) |
1565 | && (mg = mg_find((SV*)stash, PERL_MAGIC_overload_table)) | |
b267980d | 1566 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 1567 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 | 1568 | : (CV **) NULL)) |
a0d0e21e LW |
1569 | && (cv = cvp[off=method])) { /* Method for right |
1570 | * argument found */ | |
1571 | lr=1; | |
b267980d NIS |
1572 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
1573 | && (cvp=ocvp) && (lr = -1)) | |
a0d0e21e LW |
1574 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1575 | && !(flags & AMGf_unary)) { | |
1576 | /* We look for substitution for | |
1577 | * comparison operations and | |
fc36a67e | 1578 | * concatenation */ |
a0d0e21e LW |
1579 | if (method==concat_amg || method==concat_ass_amg |
1580 | || method==repeat_amg || method==repeat_ass_amg) { | |
1581 | return NULL; /* Delegate operation to string conversion */ | |
1582 | } | |
1583 | off = -1; | |
1584 | switch (method) { | |
1585 | case lt_amg: | |
1586 | case le_amg: | |
1587 | case gt_amg: | |
1588 | case ge_amg: | |
1589 | case eq_amg: | |
1590 | case ne_amg: | |
1591 | postpr = 1; off=ncmp_amg; break; | |
1592 | case slt_amg: | |
1593 | case sle_amg: | |
1594 | case sgt_amg: | |
1595 | case sge_amg: | |
1596 | case seq_amg: | |
1597 | case sne_amg: | |
1598 | postpr = 1; off=scmp_amg; break; | |
1599 | } | |
1600 | if (off != -1) cv = cvp[off]; | |
1601 | if (!cv) { | |
1602 | goto not_found; | |
1603 | } | |
1604 | } else { | |
a6006777 | 1605 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
1606 | switch (method) { |
1607 | case to_sv_amg: | |
1608 | case to_av_amg: | |
1609 | case to_hv_amg: | |
1610 | case to_gv_amg: | |
1611 | case to_cv_amg: | |
1612 | /* FAIL safe */ | |
1613 | return left; /* Delegate operation to standard mechanisms. */ | |
1614 | break; | |
1615 | } | |
a0d0e21e LW |
1616 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1617 | notfound = 1; lr = -1; | |
1618 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
1619 | notfound = 1; lr = 1; | |
1620 | } else { | |
46fc3d4c | 1621 | SV *msg; |
774d564b | 1622 | if (off==-1) off=method; |
b267980d | 1623 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
46fc3d4c | 1624 | "Operation `%s': no method found,%sargument %s%s%s%s", |
89ffc314 | 1625 | AMG_id2name(method + assignshift), |
e7ea3e70 | 1626 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d | 1627 | SvAMAGIC(left)? |
a0d0e21e LW |
1628 | "in overloaded package ": |
1629 | "has no overloaded magic", | |
b267980d | 1630 | SvAMAGIC(left)? |
a0d0e21e LW |
1631 | HvNAME(SvSTASH(SvRV(left))): |
1632 | "", | |
b267980d | 1633 | SvAMAGIC(right)? |
e7ea3e70 | 1634 | ",\n\tright argument in overloaded package ": |
b267980d | 1635 | (flags & AMGf_unary |
e7ea3e70 IZ |
1636 | ? "" |
1637 | : ",\n\tright argument has no overloaded magic"), | |
b267980d | 1638 | SvAMAGIC(right)? |
a0d0e21e | 1639 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c | 1640 | "")); |
a0d0e21e | 1641 | if (amtp && amtp->fallback >= AMGfallYES) { |
cea2e8a9 | 1642 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
a0d0e21e | 1643 | } else { |
894356b3 | 1644 | Perl_croak(aTHX_ "%"SVf, msg); |
a0d0e21e LW |
1645 | } |
1646 | return NULL; | |
1647 | } | |
ee239bfe | 1648 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
1649 | } |
1650 | } | |
497b47a8 | 1651 | #ifdef DEBUGGING |
a0d0e21e | 1652 | if (!notfound) { |
497b47a8 JH |
1653 | DEBUG_o(Perl_deb(aTHX_ |
1654 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", | |
1655 | AMG_id2name(off), | |
1656 | method+assignshift==off? "" : | |
1657 | " (initially `", | |
1658 | method+assignshift==off? "" : | |
1659 | AMG_id2name(method+assignshift), | |
1660 | method+assignshift==off? "" : "')", | |
1661 | flags & AMGf_unary? "" : | |
1662 | lr==1 ? " for right argument": " for left argument", | |
1663 | flags & AMGf_unary? " for argument" : "", | |
25716404 | 1664 | stash ? HvNAME(stash) : "null", |
497b47a8 | 1665 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 1666 | } |
497b47a8 | 1667 | #endif |
748a9306 LW |
1668 | /* Since we use shallow copy during assignment, we need |
1669 | * to dublicate the contents, probably calling user-supplied | |
1670 | * version of copy operator | |
1671 | */ | |
ee239bfe IZ |
1672 | /* We need to copy in following cases: |
1673 | * a) Assignment form was called. | |
1674 | * assignshift==1, assign==T, method + 1 == off | |
1675 | * b) Increment or decrement, called directly. | |
1676 | * assignshift==0, assign==0, method + 0 == off | |
1677 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 1678 | * assignshift==0, assign==T, |
ee239bfe IZ |
1679 | * force_cpy == T |
1680 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 1681 | * assignshift==0, assign==0, |
ee239bfe IZ |
1682 | * force_cpy == T |
1683 | * e) Assignment form translated to nomethod. | |
1684 | * assignshift==1, assign==T, method + 1 != off | |
1685 | * force_cpy == T | |
1686 | */ | |
1687 | /* off is method, method+assignshift, or a result of opcode substitution. | |
1688 | * In the latter case assignshift==0, so only notfound case is important. | |
1689 | */ | |
1690 | if (( (method + assignshift == off) | |
1691 | && (assign || (method == inc_amg) || (method == dec_amg))) | |
1692 | || force_cpy) | |
1693 | RvDEEPCP(left); | |
a0d0e21e LW |
1694 | { |
1695 | dSP; | |
1696 | BINOP myop; | |
1697 | SV* res; | |
54310121 | 1698 | bool oldcatch = CATCH_GET; |
a0d0e21e | 1699 | |
54310121 | 1700 | CATCH_SET(TRUE); |
a0d0e21e LW |
1701 | Zero(&myop, 1, BINOP); |
1702 | myop.op_last = (OP *) &myop; | |
1703 | myop.op_next = Nullop; | |
54310121 | 1704 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e | 1705 | |
e788e7d3 | 1706 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 1707 | ENTER; |
462e5cf6 | 1708 | SAVEOP(); |
533c011a | 1709 | PL_op = (OP *) &myop; |
3280af22 | 1710 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 1711 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 1712 | PUTBACK; |
cea2e8a9 | 1713 | pp_pushmark(); |
a0d0e21e | 1714 | |
924508f0 | 1715 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
1716 | PUSHs(lr>0? right: left); |
1717 | PUSHs(lr>0? left: right); | |
3280af22 | 1718 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 1719 | if (notfound) { |
89ffc314 | 1720 | PUSHs( sv_2mortal(newSVpv(AMG_id2name(method + assignshift),0))); |
a0d0e21e LW |
1721 | } |
1722 | PUSHs((SV*)cv); | |
1723 | PUTBACK; | |
1724 | ||
155aba94 | 1725 | if ((PL_op = Perl_pp_entersub(aTHX))) |
cea2e8a9 | 1726 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
1727 | LEAVE; |
1728 | SPAGAIN; | |
1729 | ||
1730 | res=POPs; | |
ebafeae7 | 1731 | PUTBACK; |
d3acc0f7 | 1732 | POPSTACK; |
54310121 | 1733 | CATCH_SET(oldcatch); |
a0d0e21e | 1734 | |
a0d0e21e | 1735 | if (postpr) { |
9c5ffd7c | 1736 | int ans=0; |
a0d0e21e LW |
1737 | switch (method) { |
1738 | case le_amg: | |
1739 | case sle_amg: | |
1740 | ans=SvIV(res)<=0; break; | |
1741 | case lt_amg: | |
1742 | case slt_amg: | |
1743 | ans=SvIV(res)<0; break; | |
1744 | case ge_amg: | |
1745 | case sge_amg: | |
1746 | ans=SvIV(res)>=0; break; | |
1747 | case gt_amg: | |
1748 | case sgt_amg: | |
1749 | ans=SvIV(res)>0; break; | |
1750 | case eq_amg: | |
1751 | case seq_amg: | |
1752 | ans=SvIV(res)==0; break; | |
1753 | case ne_amg: | |
1754 | case sne_amg: | |
1755 | ans=SvIV(res)!=0; break; | |
1756 | case inc_amg: | |
1757 | case dec_amg: | |
bbce6d69 | 1758 | SvSetSV(left,res); return left; |
dc437b57 | 1759 | case not_amg: |
fe7ac86a | 1760 | ans=!SvTRUE(res); break; |
a0d0e21e | 1761 | } |
54310121 | 1762 | return boolSV(ans); |
748a9306 LW |
1763 | } else if (method==copy_amg) { |
1764 | if (!SvROK(res)) { | |
cea2e8a9 | 1765 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
1766 | } |
1767 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
1768 | } else { |
1769 | return res; | |
1770 | } | |
1771 | } | |
1772 | } | |
c9d5ac95 GS |
1773 | |
1774 | /* | |
1775 | =for apidoc is_gv_magical | |
1776 | ||
1777 | Returns C<TRUE> if given the name of a magical GV. | |
1778 | ||
1779 | Currently only useful internally when determining if a GV should be | |
1780 | created even in rvalue contexts. | |
1781 | ||
1782 | C<flags> is not used at present but available for future extension to | |
1783 | allow selecting particular classes of magical variable. | |
1784 | ||
1785 | =cut | |
1786 | */ | |
1787 | bool | |
1788 | Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) | |
1789 | { | |
1790 | if (!len) | |
1791 | return FALSE; | |
1792 | ||
1793 | switch (*name) { | |
1794 | case 'I': | |
1795 | if (len == 3 && strEQ(name, "ISA")) | |
1796 | goto yes; | |
1797 | break; | |
1798 | case 'O': | |
1799 | if (len == 8 && strEQ(name, "OVERLOAD")) | |
1800 | goto yes; | |
1801 | break; | |
1802 | case 'S': | |
1803 | if (len == 3 && strEQ(name, "SIG")) | |
1804 | goto yes; | |
1805 | break; | |
ac27b0f5 NIS |
1806 | case '\017': /* $^O & $^OPEN */ |
1807 | if (len == 1 | |
563aca73 | 1808 | || (len == 4 && strEQ(name, "\017PEN"))) |
ac27b0f5 NIS |
1809 | { |
1810 | goto yes; | |
1811 | } | |
1812 | break; | |
c9d5ac95 GS |
1813 | case '\027': /* $^W & $^WARNING_BITS */ |
1814 | if (len == 1 | |
1815 | || (len == 12 && strEQ(name, "\027ARNING_BITS")) | |
1816 | || (len == 17 && strEQ(name, "\027IDE_SYSTEM_CALLS"))) | |
1817 | { | |
1818 | goto yes; | |
1819 | } | |
1820 | break; | |
1821 | ||
1822 | case '&': | |
1823 | case '`': | |
1824 | case '\'': | |
1825 | case ':': | |
1826 | case '?': | |
1827 | case '!': | |
1828 | case '-': | |
1829 | case '#': | |
1830 | case '*': | |
1831 | case '[': | |
1832 | case '^': | |
1833 | case '~': | |
1834 | case '=': | |
1835 | case '%': | |
1836 | case '.': | |
1837 | case '(': | |
1838 | case ')': | |
1839 | case '<': | |
1840 | case '>': | |
1841 | case ',': | |
1842 | case '\\': | |
1843 | case '/': | |
1844 | case '|': | |
1845 | case '+': | |
1846 | case ';': | |
1847 | case ']': | |
1848 | case '\001': /* $^A */ | |
1849 | case '\003': /* $^C */ | |
1850 | case '\004': /* $^D */ | |
1851 | case '\005': /* $^E */ | |
1852 | case '\006': /* $^F */ | |
1853 | case '\010': /* $^H */ | |
1854 | case '\011': /* $^I, NOT \t in EBCDIC */ | |
1855 | case '\014': /* $^L */ | |
a01268b5 | 1856 | case '\016': /* $^N */ |
c9d5ac95 GS |
1857 | case '\020': /* $^P */ |
1858 | case '\023': /* $^S */ | |
c9d5ac95 GS |
1859 | case '\026': /* $^V */ |
1860 | if (len == 1) | |
1861 | goto yes; | |
1862 | break; | |
eb27b65e AMS |
1863 | case '\024': /* $^T, ${^TAINT} */ |
1864 | if (len == 1 || strEQ(name, "\024AINT")) | |
1865 | goto yes; | |
1866 | break; | |
c9d5ac95 GS |
1867 | case '1': |
1868 | case '2': | |
1869 | case '3': | |
1870 | case '4': | |
1871 | case '5': | |
1872 | case '6': | |
1873 | case '7': | |
1874 | case '8': | |
1875 | case '9': | |
1876 | if (len > 1) { | |
1877 | char *end = name + len; | |
1878 | while (--end > name) { | |
1879 | if (!isDIGIT(*end)) | |
1880 | return FALSE; | |
1881 | } | |
1882 | } | |
1883 | yes: | |
1884 | return TRUE; | |
1885 | default: | |
1886 | break; | |
1887 | } | |
1888 | return FALSE; | |
1889 | } |