Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
1129b882 | 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
67fbe0e1 | 4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others |
79072805 LW |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
a0d0e21e LW |
9 | */ |
10 | ||
11 | /* | |
12 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure | |
4ac71550 | 13 | * of your inquisitiveness, I shall spend all the rest of my days in answering |
a0d0e21e LW |
14 | * you. What more do you want to know?' |
15 | * 'The names of all the stars, and of all living things, and the whole | |
16 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' | |
17 | * laughed Pippin. | |
4ac71550 | 18 | * |
cdad3b53 | 19 | * [p.599 of _The Lord of the Rings_, III/xi: "The PalantÃr"] |
79072805 LW |
20 | */ |
21 | ||
ccfc67b7 | 22 | /* |
51b56f5c | 23 | =head1 GV Handling |
166f8a29 DM |
24 | A GV is a structure which corresponds to to a Perl typeglob, ie *foo. |
25 | It is a structure that holds a pointer to a scalar, an array, a hash etc, | |
26 | corresponding to $foo, @foo, %foo. | |
27 | ||
28 | GVs are usually found as values in stashes (symbol table hashes) where | |
29 | Perl stores its global variables. | |
30 | ||
fa2b244a KW |
31 | =for apidoc Ayh||GV |
32 | ||
166f8a29 | 33 | =cut |
ccfc67b7 JH |
34 | */ |
35 | ||
79072805 | 36 | #include "EXTERN.h" |
864dbfa3 | 37 | #define PERL_IN_GV_C |
79072805 | 38 | #include "perl.h" |
6ffcffbd | 39 | #include "overload.inc" |
4aaa4757 | 40 | #include "keywords.h" |
2846acbf | 41 | #include "feature.h" |
79072805 | 42 | |
f54cb97a | 43 | static const char S_autoload[] = "AUTOLOAD"; |
3c81f0b3 | 44 | #define S_autolen (sizeof("AUTOLOAD")-1) |
5c7983e5 | 45 | |
13c59d41 MH |
46 | GV * |
47 | Perl_gv_add_by_type(pTHX_ GV *gv, svtype type) | |
c69033f2 | 48 | { |
d5713896 | 49 | SV **where; |
7918f24d | 50 | |
13c59d41 MH |
51 | if ( |
52 | !gv | |
53 | || ( | |
54 | SvTYPE((const SV *)gv) != SVt_PVGV | |
13be902c | 55 | && SvTYPE((const SV *)gv) != SVt_PVLV |
13c59d41 | 56 | ) |
13be902c | 57 | ) { |
1604cfb0 MS |
58 | const char *what; |
59 | if (type == SVt_PVIO) { | |
60 | /* | |
61 | * if it walks like a dirhandle, then let's assume that | |
62 | * this is a dirhandle. | |
63 | */ | |
64 | what = OP_IS_DIRHOP(PL_op->op_type) ? | |
65 | "dirhandle" : "filehandle"; | |
66 | } else if (type == SVt_PVHV) { | |
67 | what = "hash"; | |
68 | } else { | |
69 | what = type == SVt_PVAV ? "array" : "scalar"; | |
70 | } | |
71 | /* diag_listed_as: Bad symbol for filehandle */ | |
72 | Perl_croak(aTHX_ "Bad symbol for %s", what); | |
bb85b28a | 73 | } |
d5713896 | 74 | |
13c59d41 | 75 | if (type == SVt_PVHV) { |
1604cfb0 | 76 | where = (SV **)&GvHV(gv); |
13c59d41 | 77 | } else if (type == SVt_PVAV) { |
1604cfb0 | 78 | where = (SV **)&GvAV(gv); |
13c59d41 | 79 | } else if (type == SVt_PVIO) { |
1604cfb0 | 80 | where = (SV **)&GvIOp(gv); |
13c59d41 | 81 | } else { |
1604cfb0 | 82 | where = &GvSV(gv); |
13c59d41 | 83 | } |
7918f24d | 84 | |
13c59d41 MH |
85 | if (!*where) |
86 | { | |
1604cfb0 MS |
87 | *where = newSV_type(type); |
88 | if (type == SVt_PVAV | |
89 | && memEQs(GvNAME(gv), GvNAMELEN(gv), "ISA")) | |
90 | sv_magic(*where, (SV *)gv, PERL_MAGIC_isa, NULL, 0); | |
e17aed30 | 91 | } |
13c59d41 | 92 | return gv; |
79072805 LW |
93 | } |
94 | ||
b1decff3 KW |
95 | /* |
96 | =for apidoc gv_fetchfile | |
97 | =for apidoc_item gv_fetchfile_flags | |
98 | ||
99 | These return the debugger glob for the file (compiled by Perl) whose name is | |
100 | given by the C<name> parameter. | |
101 | ||
102 | There are currently exactly two differences between these functions. | |
103 | ||
104 | The C<name> parameter to C<gv_fetchfile> is a C string, meaning it is | |
105 | C<NUL>-terminated; whereas the C<name> parameter to C<gv_fetchfile_flags> is a | |
106 | Perl string, whose length (in bytes) is passed in via the C<namelen> parameter | |
107 | This means the name may contain embedded C<NUL> characters. | |
108 | C<namelen> doesn't exist in plain C<gv_fetchfile>). | |
109 | ||
110 | The other difference is that C<gv_fetchfile_flags> has an extra C<flags> | |
111 | parameter, which is currently completely ignored, but allows for possible | |
112 | future extensions. | |
113 | ||
114 | =cut | |
115 | */ | |
79072805 | 116 | GV * |
864dbfa3 | 117 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 118 | { |
7918f24d | 119 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec NC |
120 | return gv_fetchfile_flags(name, strlen(name), 0); |
121 | } | |
122 | ||
123 | GV * | |
124 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
1604cfb0 | 125 | const U32 flags) |
d9095cec | 126 | { |
4116122e | 127 | char smallbuf[128]; |
53d95988 | 128 | char *tmpbuf; |
d9095cec | 129 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
130 | GV *gv; |
131 | ||
7918f24d | 132 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec NC |
133 | PERL_UNUSED_ARG(flags); |
134 | ||
1d7c1841 | 135 | if (!PL_defstash) |
1604cfb0 | 136 | return NULL; |
1d7c1841 | 137 | |
d9095cec | 138 | if (tmplen <= sizeof smallbuf) |
1604cfb0 | 139 | tmpbuf = smallbuf; |
53d95988 | 140 | else |
1604cfb0 | 141 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 142 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
143 | tmpbuf[0] = '_'; |
144 | tmpbuf[1] = '<'; | |
d9095cec | 145 | memcpy(tmpbuf + 2, name, namelen); |
9c913148 TC |
146 | GV **gvp = (GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, (flags & GVF_NOADD) ? FALSE : TRUE); |
147 | if (gvp) { | |
148 | gv = *gvp; | |
149 | if (!isGV(gv)) { | |
150 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); | |
c69033f2 | 151 | #ifdef PERL_DONT_CREATE_GVSV |
9c913148 | 152 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 153 | #else |
9c913148 | 154 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 155 | #endif |
9c913148 TC |
156 | } |
157 | if (PERLDB_LINE_OR_SAVESRC && !GvAV(gv)) | |
1604cfb0 | 158 | hv_magic(GvHVn(gv), GvAVn(gv), PERL_MAGIC_dbfile); |
9c913148 TC |
159 | } |
160 | else { | |
161 | gv = NULL; | |
162 | } | |
53d95988 | 163 | if (tmpbuf != smallbuf) |
1604cfb0 | 164 | Safefree(tmpbuf); |
79072805 LW |
165 | return gv; |
166 | } | |
167 | ||
62d55b22 NC |
168 | /* |
169 | =for apidoc gv_const_sv | |
170 | ||
171 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
172 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
173 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
796b6530 | 174 | C<NULL>. |
62d55b22 NC |
175 | |
176 | =cut | |
177 | */ | |
178 | ||
179 | SV * | |
180 | Perl_gv_const_sv(pTHX_ GV *gv) | |
181 | { | |
7918f24d | 182 | PERL_ARGS_ASSERT_GV_CONST_SV; |
23491f1d | 183 | PERL_UNUSED_CONTEXT; |
7918f24d | 184 | |
62d55b22 | 185 | if (SvTYPE(gv) == SVt_PVGV) |
1604cfb0 | 186 | return cv_const_sv(GvCVu(gv)); |
16a6e5a4 | 187 | return SvROK(gv) && SvTYPE(SvRV(gv)) != SVt_PVAV && SvTYPE(SvRV(gv)) != SVt_PVCV ? SvRV(gv) : NULL; |
62d55b22 NC |
188 | } |
189 | ||
12816592 NC |
190 | GP * |
191 | Perl_newGP(pTHX_ GV *const gv) | |
192 | { | |
193 | GP *gp; | |
19bad673 | 194 | U32 hash; |
19bad673 NC |
195 | const char *file; |
196 | STRLEN len; | |
2639089b | 197 | #ifndef USE_ITHREADS |
6b352265 | 198 | GV *filegv; |
2639089b | 199 | #endif |
19bad673 | 200 | |
7918f24d | 201 | PERL_ARGS_ASSERT_NEWGP; |
2639089b DD |
202 | Newxz(gp, 1, GP); |
203 | gp->gp_egv = gv; /* allow compiler to reuse gv after this */ | |
204 | #ifndef PERL_DONT_CREATE_GVSV | |
205 | gp->gp_sv = newSV(0); | |
206 | #endif | |
7918f24d | 207 | |
c947bc1d | 208 | /* PL_curcop may be null here. E.g., |
1604cfb0 | 209 | INIT { bless {} and exit } |
c947bc1d FC |
210 | frees INIT before looking up DESTROY (and creating *DESTROY) |
211 | */ | |
2639089b | 212 | if (PL_curcop) { |
1604cfb0 | 213 | gp->gp_line = CopLINE(PL_curcop); /* 0 otherwise Newxz */ |
6e314d4f | 214 | #ifdef USE_ITHREADS |
1604cfb0 MS |
215 | if (CopFILE(PL_curcop)) { |
216 | file = CopFILE(PL_curcop); | |
217 | len = strlen(file); | |
218 | } | |
2639089b | 219 | #else |
1604cfb0 MS |
220 | filegv = CopFILEGV(PL_curcop); |
221 | if (filegv) { | |
222 | file = GvNAME(filegv)+2; | |
223 | len = GvNAMELEN(filegv)-2; | |
224 | } | |
6e314d4f | 225 | #endif |
1604cfb0 | 226 | else goto no_file; |
cb0d3385 FC |
227 | } |
228 | else { | |
1604cfb0 MS |
229 | no_file: |
230 | file = ""; | |
231 | len = 0; | |
19bad673 | 232 | } |
f4890806 NC |
233 | |
234 | PERL_HASH(hash, file, len); | |
f4890806 | 235 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
236 | gp->gp_refcnt = 1; |
237 | ||
238 | return gp; | |
239 | } | |
240 | ||
803f2748 DM |
241 | /* Assign CvGV(cv) = gv, handling weak references. |
242 | * See also S_anonymise_cv_maybe */ | |
243 | ||
244 | void | |
245 | Perl_cvgv_set(pTHX_ CV* cv, GV* gv) | |
246 | { | |
ae77754a | 247 | GV * const oldgv = CvNAMED(cv) ? NULL : SvANY(cv)->xcv_gv_u.xcv_gv; |
b290562e | 248 | HEK *hek; |
803f2748 DM |
249 | PERL_ARGS_ASSERT_CVGV_SET; |
250 | ||
251 | if (oldgv == gv) | |
1604cfb0 | 252 | return; |
803f2748 DM |
253 | |
254 | if (oldgv) { | |
1604cfb0 MS |
255 | if (CvCVGV_RC(cv)) { |
256 | SvREFCNT_dec_NN(oldgv); | |
257 | CvCVGV_RC_off(cv); | |
258 | } | |
259 | else { | |
260 | sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv)); | |
261 | } | |
803f2748 | 262 | } |
db5cc3ee | 263 | else if ((hek = CvNAME_HEK(cv))) { |
1604cfb0 MS |
264 | unshare_hek(hek); |
265 | CvLEXICAL_off(cv); | |
db5cc3ee | 266 | } |
803f2748 | 267 | |
5988f306 | 268 | CvNAMED_off(cv); |
b290562e | 269 | SvANY(cv)->xcv_gv_u.xcv_gv = gv; |
c794ca97 | 270 | assert(!CvCVGV_RC(cv)); |
803f2748 DM |
271 | |
272 | if (!gv) | |
1604cfb0 | 273 | return; |
803f2748 | 274 | |
c794ca97 | 275 | if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv)) |
1604cfb0 | 276 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv)); |
c794ca97 | 277 | else { |
1604cfb0 MS |
278 | CvCVGV_RC_on(cv); |
279 | SvREFCNT_inc_simple_void_NN(gv); | |
803f2748 | 280 | } |
803f2748 DM |
281 | } |
282 | ||
ae77754a FC |
283 | /* Convert CvSTASH + CvNAME_HEK into a GV. Conceptually, all subs have a |
284 | GV, but for efficiency that GV may not in fact exist. This function, | |
285 | called by CvGV, reifies it. */ | |
286 | ||
287 | GV * | |
288 | Perl_cvgv_from_hek(pTHX_ CV *cv) | |
289 | { | |
290 | GV *gv; | |
2eaf799e | 291 | SV **svp; |
ae77754a FC |
292 | PERL_ARGS_ASSERT_CVGV_FROM_HEK; |
293 | assert(SvTYPE(cv) == SVt_PVCV); | |
294 | if (!CvSTASH(cv)) return NULL; | |
295 | ASSUME(CvNAME_HEK(cv)); | |
2eaf799e FC |
296 | svp = hv_fetchhek(CvSTASH(cv), CvNAME_HEK(cv), 0); |
297 | gv = MUTABLE_GV(svp && *svp ? *svp : newSV(0)); | |
298 | if (!isGV(gv)) | |
1604cfb0 MS |
299 | gv_init_pvn(gv, CvSTASH(cv), HEK_KEY(CvNAME_HEK(cv)), |
300 | HEK_LEN(CvNAME_HEK(cv)), | |
301 | SVf_UTF8 * !!HEK_UTF8(CvNAME_HEK(cv))); | |
2eaf799e | 302 | if (!CvNAMED(cv)) { /* gv_init took care of it */ |
1604cfb0 MS |
303 | assert (SvANY(cv)->xcv_gv_u.xcv_gv == gv); |
304 | return gv; | |
2eaf799e | 305 | } |
ae77754a FC |
306 | unshare_hek(CvNAME_HEK(cv)); |
307 | CvNAMED_off(cv); | |
308 | SvANY(cv)->xcv_gv_u.xcv_gv = gv; | |
2eaf799e | 309 | if (svp && *svp) SvREFCNT_inc_simple_void_NN(gv); |
ae77754a FC |
310 | CvCVGV_RC_on(cv); |
311 | return gv; | |
312 | } | |
313 | ||
c68d9564 Z |
314 | /* Assign CvSTASH(cv) = st, handling weak references. */ |
315 | ||
316 | void | |
317 | Perl_cvstash_set(pTHX_ CV *cv, HV *st) | |
318 | { | |
319 | HV *oldst = CvSTASH(cv); | |
320 | PERL_ARGS_ASSERT_CVSTASH_SET; | |
321 | if (oldst == st) | |
1604cfb0 | 322 | return; |
c68d9564 | 323 | if (oldst) |
1604cfb0 | 324 | sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv)); |
c68d9564 Z |
325 | SvANY(cv)->xcv_stash = st; |
326 | if (st) | |
1604cfb0 | 327 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv)); |
c68d9564 | 328 | } |
803f2748 | 329 | |
e1104062 FC |
330 | /* |
331 | =for apidoc gv_init_pvn | |
332 | ||
333 | Converts a scalar into a typeglob. This is an incoercible typeglob; | |
334 | assigning a reference to it will assign to one of its slots, instead of | |
796b6530 KW |
335 | overwriting it as happens with typeglobs created by C<SvSetSV>. Converting |
336 | any scalar that is C<SvOK()> may produce unpredictable results and is reserved | |
e1104062 FC |
337 | for perl's internal use. |
338 | ||
339 | C<gv> is the scalar to be converted. | |
340 | ||
341 | C<stash> is the parent stash/package, if any. | |
342 | ||
04ec7e59 FC |
343 | C<name> and C<len> give the name. The name must be unqualified; |
344 | that is, it must not include the package name. If C<gv> is a | |
e1104062 FC |
345 | stash element, it is the caller's responsibility to ensure that the name |
346 | passed to this function matches the name of the element. If it does not | |
347 | match, perl's internal bookkeeping will get out of sync. | |
348 | ||
4a4088c4 | 349 | C<flags> can be set to C<SVf_UTF8> if C<name> is a UTF-8 string, or |
04ec7e59 | 350 | the return value of SvUTF8(sv). It can also take the |
796b6530 | 351 | C<GV_ADDMULTI> flag, which means to pretend that the GV has been |
e1104062 FC |
352 | seen before (i.e., suppress "Used once" warnings). |
353 | ||
5af38e47 KW |
354 | =for apidoc Amnh||GV_ADDMULTI |
355 | ||
e1104062 FC |
356 | =for apidoc gv_init |
357 | ||
4a4088c4 | 358 | The old form of C<gv_init_pvn()>. It does not work with UTF-8 strings, as it |
04ec7e59 | 359 | has no flags parameter. If the C<multi> parameter is set, the |
796b6530 | 360 | C<GV_ADDMULTI> flag will be passed to C<gv_init_pvn()>. |
e1104062 FC |
361 | |
362 | =for apidoc gv_init_pv | |
363 | ||
796b6530 | 364 | Same as C<gv_init_pvn()>, but takes a nul-terminated string for the name |
e1104062 FC |
365 | instead of separate char * and length parameters. |
366 | ||
367 | =for apidoc gv_init_sv | |
368 | ||
796b6530 | 369 | Same as C<gv_init_pvn()>, but takes an SV * for the name instead of separate |
e1104062 FC |
370 | char * and length parameters. C<flags> is currently unused. |
371 | ||
372 | =cut | |
373 | */ | |
374 | ||
463ee0b2 | 375 | void |
04ec7e59 | 376 | Perl_gv_init_sv(pTHX_ GV *gv, HV *stash, SV* namesv, U32 flags) |
e6066781 BF |
377 | { |
378 | char *namepv; | |
379 | STRLEN namelen; | |
380 | PERL_ARGS_ASSERT_GV_INIT_SV; | |
381 | namepv = SvPV(namesv, namelen); | |
382 | if (SvUTF8(namesv)) | |
383 | flags |= SVf_UTF8; | |
04ec7e59 | 384 | gv_init_pvn(gv, stash, namepv, namelen, flags); |
e6066781 BF |
385 | } |
386 | ||
387 | void | |
04ec7e59 | 388 | Perl_gv_init_pv(pTHX_ GV *gv, HV *stash, const char *name, U32 flags) |
e6066781 BF |
389 | { |
390 | PERL_ARGS_ASSERT_GV_INIT_PV; | |
04ec7e59 | 391 | gv_init_pvn(gv, stash, name, strlen(name), flags); |
e6066781 BF |
392 | } |
393 | ||
394 | void | |
04ec7e59 | 395 | Perl_gv_init_pvn(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, U32 flags) |
463ee0b2 | 396 | { |
3b6733bf NC |
397 | const U32 old_type = SvTYPE(gv); |
398 | const bool doproto = old_type > SVt_NULL; | |
f9509170 | 399 | char * const proto = (doproto && SvPOK(gv)) |
1604cfb0 MS |
400 | ? ((void)(SvIsCOW(gv) && (sv_force_normal((SV *)gv), 0)), SvPVX(gv)) |
401 | : NULL; | |
49a54bbe | 402 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
e0260a5b | 403 | const U32 proto_utf8 = proto ? SvUTF8(gv) : 0; |
756cb477 | 404 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 405 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
6881372e | 406 | const bool really_sub = |
1604cfb0 | 407 | has_constant && SvTYPE(has_constant) == SVt_PVCV; |
6881372e | 408 | COP * const old = PL_curcop; |
756cb477 | 409 | |
e6066781 | 410 | PERL_ARGS_ASSERT_GV_INIT_PVN; |
756cb477 NC |
411 | assert (!(proto && has_constant)); |
412 | ||
413 | if (has_constant) { | |
1604cfb0 MS |
414 | /* The constant has to be a scalar, array or subroutine. */ |
415 | switch (SvTYPE(has_constant)) { | |
416 | case SVt_PVHV: | |
417 | case SVt_PVFM: | |
418 | case SVt_PVIO: | |
5c1f4d79 | 419 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", |
1604cfb0 | 420 | sv_reftype(has_constant, 0)); |
c9a0dcdc | 421 | NOT_REACHED; /* NOTREACHED */ |
4bbde2f7 | 422 | break; |
81d52ecd | 423 | |
1604cfb0 MS |
424 | default: NOOP; |
425 | } | |
426 | SvRV_set(gv, NULL); | |
427 | SvROK_off(gv); | |
756cb477 | 428 | } |
463ee0b2 | 429 | |
3b6733bf NC |
430 | |
431 | if (old_type < SVt_PVGV) { | |
1604cfb0 MS |
432 | if (old_type >= SVt_PV) |
433 | SvCUR_set(gv, 0); | |
434 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); | |
3b6733bf | 435 | } |
55d729e4 | 436 | if (SvLEN(gv)) { |
1604cfb0 MS |
437 | if (proto) { |
438 | SvPV_set(gv, NULL); | |
439 | SvLEN_set(gv, 0); | |
440 | SvPOK_off(gv); | |
441 | } else | |
442 | Safefree(SvPVX_mutable(gv)); | |
55d729e4 | 443 | } |
2e5b91de NC |
444 | SvIOK_off(gv); |
445 | isGV_with_GP_on(gv); | |
12816592 | 446 | |
6881372e FC |
447 | if (really_sub && !CvISXSUB(has_constant) && CvSTART(has_constant) |
448 | && ( CvSTART(has_constant)->op_type == OP_NEXTSTATE | |
1604cfb0 MS |
449 | || CvSTART(has_constant)->op_type == OP_DBSTATE)) |
450 | PL_curcop = (COP *)CvSTART(has_constant); | |
c43ae56f | 451 | GvGP_set(gv, Perl_newGP(aTHX_ gv)); |
6881372e | 452 | PL_curcop = old; |
e15faf7d NC |
453 | GvSTASH(gv) = stash; |
454 | if (stash) | |
1604cfb0 | 455 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
04f3bf56 | 456 | gv_name_set(gv, name, len, GV_ADD | ( flags & SVf_UTF8 ? SVf_UTF8 : 0 )); |
04ec7e59 | 457 | if (flags & GV_ADDMULTI || doproto) /* doproto means it */ |
1604cfb0 | 458 | GvMULTI_on(gv); /* _was_ mentioned */ |
6881372e | 459 | if (really_sub) { |
1604cfb0 MS |
460 | /* Not actually a constant. Just a regular sub. */ |
461 | CV * const cv = (CV *)has_constant; | |
462 | GvCV_set(gv,cv); | |
463 | if (CvNAMED(cv) && CvSTASH(cv) == stash && ( | |
464 | CvNAME_HEK(cv) == GvNAME_HEK(gv) | |
465 | || ( HEK_LEN(CvNAME_HEK(cv)) == HEK_LEN(GvNAME_HEK(gv)) | |
466 | && HEK_FLAGS(CvNAME_HEK(cv)) != HEK_FLAGS(GvNAME_HEK(gv)) | |
467 | && HEK_UTF8(CvNAME_HEK(cv)) == HEK_UTF8(GvNAME_HEK(gv)) | |
468 | && memEQ(HEK_KEY(CvNAME_HEK(cv)), GvNAME(gv), GvNAMELEN(gv)) | |
469 | ) | |
470 | )) | |
471 | CvGV_set(cv,gv); | |
2eaf799e FC |
472 | } |
473 | else if (doproto) { | |
1604cfb0 MS |
474 | CV *cv; |
475 | if (has_constant) { | |
476 | /* newCONSTSUB takes ownership of the reference from us. */ | |
477 | cv = newCONSTSUB_flags(stash, name, len, flags, has_constant); | |
478 | /* In case op.c:S_process_special_blocks stole it: */ | |
479 | if (!GvCV(gv)) | |
480 | GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv)); | |
481 | assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */ | |
482 | /* If this reference was a copy of another, then the subroutine | |
483 | must have been "imported", by a Perl space assignment to a GV | |
484 | from a reference to CV. */ | |
485 | if (exported_constant) | |
486 | GvIMPORTED_CV_on(gv); | |
487 | CvSTASH_set(cv, PL_curstash); /* XXX Why is this needed? */ | |
488 | } else { | |
489 | cv = newSTUB(gv,1); | |
490 | } | |
491 | if (proto) { | |
492 | sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen, | |
493 | SV_HAS_TRAILING_NUL); | |
e0260a5b | 494 | if ( proto_utf8 ) SvUTF8_on(MUTABLE_SV(cv)); |
1604cfb0 | 495 | } |
55d729e4 | 496 | } |
463ee0b2 LW |
497 | } |
498 | ||
76e3520e | 499 | STATIC void |
e6066781 | 500 | S_gv_init_svtype(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 501 | { |
13c59d41 MH |
502 | PERL_ARGS_ASSERT_GV_INIT_SVTYPE; |
503 | ||
504 | switch (sv_type) { | |
505 | case SVt_PVIO: | |
1604cfb0 MS |
506 | (void)GvIOn(gv); |
507 | break; | |
13c59d41 | 508 | case SVt_PVAV: |
1604cfb0 MS |
509 | (void)GvAVn(gv); |
510 | break; | |
13c59d41 | 511 | case SVt_PVHV: |
1604cfb0 MS |
512 | (void)GvHVn(gv); |
513 | break; | |
c69033f2 | 514 | #ifdef PERL_DONT_CREATE_GVSV |
13c59d41 MH |
515 | case SVt_NULL: |
516 | case SVt_PVCV: | |
517 | case SVt_PVFM: | |
518 | case SVt_PVGV: | |
1604cfb0 | 519 | break; |
13c59d41 | 520 | default: |
1604cfb0 MS |
521 | if(GvSVn(gv)) { |
522 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
523 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
524 | its side effect */ | |
525 | } | |
c69033f2 | 526 | #endif |
a0d0e21e LW |
527 | } |
528 | } | |
529 | ||
0f8d4b5e FC |
530 | static void core_xsub(pTHX_ CV* cv); |
531 | ||
532 | static GV * | |
533 | S_maybe_add_coresub(pTHX_ HV * const stash, GV *gv, | |
87566176 | 534 | const char * const name, const STRLEN len) |
0f8d4b5e FC |
535 | { |
536 | const int code = keyword(name, len, 1); | |
537 | static const char file[] = __FILE__; | |
97021f77 | 538 | CV *cv, *oldcompcv = NULL; |
0f8d4b5e | 539 | int opnum = 0; |
0f8d4b5e | 540 | bool ampable = TRUE; /* &{}-able */ |
97021f77 FC |
541 | COP *oldcurcop = NULL; |
542 | yy_parser *oldparser = NULL; | |
543 | I32 oldsavestack_ix = 0; | |
0f8d4b5e FC |
544 | |
545 | assert(gv || stash); | |
546 | assert(name); | |
0f8d4b5e | 547 | |
88b892d8 FC |
548 | if (!code) return NULL; /* Not a keyword */ |
549 | switch (code < 0 ? -code : code) { | |
0f8d4b5e | 550 | /* no support for \&CORE::infix; |
d885f758 | 551 | no support for funcs that do not parse like funcs */ |
88b892d8 | 552 | case KEY___DATA__: case KEY___END__: case KEY_and: case KEY_AUTOLOAD: |
a1325b90 | 553 | case KEY_BEGIN : case KEY_CHECK : case KEY_catch : case KEY_cmp: |
f79e2ff9 | 554 | case KEY_default : case KEY_defer : case KEY_DESTROY: |
88b892d8 | 555 | case KEY_do : case KEY_dump : case KEY_else : case KEY_elsif : |
0a3ddc72 | 556 | case KEY_END : case KEY_eq : case KEY_eval : case KEY_finally: |
88b892d8 | 557 | case KEY_for : case KEY_foreach: case KEY_format: case KEY_ge : |
813e85a0 PE |
558 | case KEY_given : case KEY_goto : case KEY_grep : case KEY_gt : |
559 | case KEY_if : case KEY_isa : case KEY_INIT : case KEY_last : | |
560 | case KEY_le : case KEY_local : case KEY_lt : case KEY_m : | |
561 | case KEY_map : case KEY_my: | |
88b892d8 | 562 | case KEY_ne : case KEY_next : case KEY_no: case KEY_or: case KEY_our: |
1efec5ed | 563 | case KEY_package: case KEY_print: case KEY_printf: |
919ad5f7 | 564 | case KEY_q : case KEY_qq : case KEY_qr : case KEY_qw : |
88b892d8 | 565 | case KEY_qx : case KEY_redo : case KEY_require: case KEY_return: |
d33bb3da | 566 | case KEY_s : case KEY_say : case KEY_sort : |
d80ed303 | 567 | case KEY_state: case KEY_sub : |
a1325b90 | 568 | case KEY_tr : case KEY_try : case KEY_UNITCHECK: case KEY_unless: |
7896dde7 | 569 | case KEY_until: case KEY_use : case KEY_when : case KEY_while : |
88b892d8 | 570 | case KEY_x : case KEY_xor : case KEY_y : |
1604cfb0 | 571 | return NULL; |
0f8d4b5e | 572 | case KEY_chdir: |
eb31eb35 | 573 | case KEY_chomp: case KEY_chop: case KEY_defined: case KEY_delete: |
73665bc4 | 574 | case KEY_eof : case KEY_exec: case KEY_exists : |
0f8d4b5e | 575 | case KEY_lstat: |
bea284c8 | 576 | case KEY_split: |
0f8d4b5e FC |
577 | case KEY_stat: |
578 | case KEY_system: | |
579 | case KEY_truncate: case KEY_unlink: | |
1604cfb0 | 580 | ampable = FALSE; |
0f8d4b5e FC |
581 | } |
582 | if (!gv) { | |
1604cfb0 MS |
583 | gv = (GV *)newSV(0); |
584 | gv_init(gv, stash, name, len, TRUE); | |
0f8d4b5e | 585 | } |
7e68c38b | 586 | GvMULTI_on(gv); |
0f8d4b5e | 587 | if (ampable) { |
1604cfb0 MS |
588 | ENTER; |
589 | oldcurcop = PL_curcop; | |
590 | oldparser = PL_parser; | |
591 | lex_start(NULL, NULL, 0); | |
592 | oldcompcv = PL_compcv; | |
593 | PL_compcv = NULL; /* Prevent start_subparse from setting | |
594 | CvOUTSIDE. */ | |
595 | oldsavestack_ix = start_subparse(FALSE,0); | |
596 | cv = PL_compcv; | |
0f8d4b5e FC |
597 | } |
598 | else { | |
1604cfb0 MS |
599 | /* Avoid calling newXS, as it calls us, and things start to |
600 | get hairy. */ | |
601 | cv = MUTABLE_CV(newSV_type(SVt_PVCV)); | |
602 | GvCV_set(gv,cv); | |
603 | GvCVGEN(gv) = 0; | |
604 | CvISXSUB_on(cv); | |
605 | CvXSUB(cv) = core_xsub; | |
606 | PoisonPADLIST(cv); | |
0f8d4b5e FC |
607 | } |
608 | CvGV_set(cv, gv); /* This stops new ATTRSUB from setting CvFILE | |
609 | from PL_curcop. */ | |
9b669ea1 DD |
610 | /* XSUBs can't be perl lang/perl5db.pl debugged |
611 | if (PERLDB_LINE_OR_SAVESRC) | |
612 | (void)gv_fetchfile(file); */ | |
0f8d4b5e FC |
613 | CvFILE(cv) = (char *)file; |
614 | /* XXX This is inefficient, as doing things this order causes | |
615 | a prototype check in newATTRSUB. But we have to do | |
616 | it this order as we need an op number before calling | |
617 | new ATTRSUB. */ | |
618 | (void)core_prototype((SV *)cv, name, code, &opnum); | |
87566176 | 619 | if (stash) |
1604cfb0 | 620 | (void)hv_store(stash,name,len,(SV *)gv,0); |
0f8d4b5e | 621 | if (ampable) { |
4428fb0e TC |
622 | #ifdef DEBUGGING |
623 | CV *orig_cv = cv; | |
624 | #endif | |
1604cfb0 | 625 | CvLVALUE_on(cv); |
4428fb0e TC |
626 | /* newATTRSUB will free the CV and return NULL if we're still |
627 | compiling after a syntax error */ | |
1604cfb0 MS |
628 | if ((cv = newATTRSUB_x( |
629 | oldsavestack_ix, (OP *)gv, | |
630 | NULL,NULL, | |
631 | coresub_op( | |
632 | opnum | |
633 | ? newSVuv((UV)opnum) | |
634 | : newSVpvn(name,len), | |
635 | code, opnum | |
636 | ), | |
637 | TRUE | |
4428fb0e TC |
638 | )) != NULL) { |
639 | assert(GvCV(gv) == orig_cv); | |
640 | if (opnum != OP_VEC && opnum != OP_SUBSTR && opnum != OP_POS | |
cd642408 | 641 | && opnum != OP_UNDEF && opnum != OP_KEYS) |
4428fb0e TC |
642 | CvLVALUE_off(cv); /* Now *that* was a neat trick. */ |
643 | } | |
1604cfb0 MS |
644 | LEAVE; |
645 | PL_parser = oldparser; | |
646 | PL_curcop = oldcurcop; | |
647 | PL_compcv = oldcompcv; | |
0f8d4b5e | 648 | } |
4428fb0e | 649 | if (cv) { |
1604cfb0 MS |
650 | SV *opnumsv = newSViv( |
651 | (opnum == OP_ENTEREVAL && len == 9 && memEQ(name, "evalbytes", 9)) ? | |
652 | (OP_ENTEREVAL | (1<<16)) | |
653 | : opnum ? opnum : (((I32)name[2]) << 16)); | |
a83b92fa | 654 | cv_set_call_checker_flags(cv, Perl_ck_entersub_args_core, opnumsv, 0); |
1604cfb0 | 655 | SvREFCNT_dec_NN(opnumsv); |
4428fb0e TC |
656 | } |
657 | ||
0f8d4b5e FC |
658 | return gv; |
659 | } | |
660 | ||
954c1994 | 661 | /* |
6c53d59b FC |
662 | =for apidoc gv_fetchmeth |
663 | ||
664 | Like L</gv_fetchmeth_pvn>, but lacks a flags parameter. | |
665 | ||
e6919483 BF |
666 | =for apidoc gv_fetchmeth_sv |
667 | ||
668 | Exactly like L</gv_fetchmeth_pvn>, but takes the name string in the form | |
669 | of an SV instead of a string/length pair. | |
670 | ||
671 | =cut | |
672 | */ | |
673 | ||
674 | GV * | |
675 | Perl_gv_fetchmeth_sv(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
676 | { | |
c290e187 | 677 | char *namepv; |
678 | STRLEN namelen; | |
679 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV; | |
680 | if (LIKELY(SvPOK_nog(namesv))) /* common case */ | |
14062320 FC |
681 | return gv_fetchmeth_internal(stash, namesv, NULL, 0, level, |
682 | flags | SvUTF8(namesv)); | |
c290e187 | 683 | namepv = SvPV(namesv, namelen); |
684 | if (SvUTF8(namesv)) flags |= SVf_UTF8; | |
685 | return gv_fetchmeth_pvn(stash, namepv, namelen, level, flags); | |
e6919483 BF |
686 | } |
687 | ||
688 | /* | |
689 | =for apidoc gv_fetchmeth_pv | |
690 | ||
9c913148 | 691 | Exactly like L</gv_fetchmeth_pvn>, but takes a nul-terminated string |
e6919483 BF |
692 | instead of a string/length pair. |
693 | ||
694 | =cut | |
695 | */ | |
696 | ||
697 | GV * | |
698 | Perl_gv_fetchmeth_pv(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
699 | { | |
700 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV; | |
c6afe666 | 701 | return gv_fetchmeth_internal(stash, NULL, name, strlen(name), level, flags); |
e6919483 BF |
702 | } |
703 | ||
704 | /* | |
705 | =for apidoc gv_fetchmeth_pvn | |
954c1994 GS |
706 | |
707 | Returns the glob with the given C<name> and a defined subroutine or | |
708 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
796b6530 | 709 | accessible via C<@ISA> and C<UNIVERSAL::>. |
954c1994 GS |
710 | |
711 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
712 | side-effect creates a glob with the given C<name> in the given C<stash> | |
713 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 714 | up caching info for this glob. |
954c1994 | 715 | |
d913c423 MR |
716 | The only significant values for C<flags> are C<GV_SUPER>, C<GV_NOUNIVERSAL>, and |
717 | C<SVf_UTF8>. | |
aae43805 | 718 | |
796b6530 | 719 | C<GV_SUPER> indicates that we want to look up the method in the superclasses |
aae43805 | 720 | of the C<stash>. |
e6919483 | 721 | |
d913c423 MR |
722 | C<GV_NOUNIVERSAL> indicates that we do not want to look up the method in |
723 | the stash accessible by C<UNIVERSAL::>. | |
724 | ||
aae43805 | 725 | The |
954c1994 | 726 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b | 727 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 728 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 729 | obtained from the GV with the C<GvCV> macro. |
954c1994 | 730 | |
4f8d487a KW |
731 | =for apidoc Amnh||GV_SUPER |
732 | ||
954c1994 GS |
733 | =cut |
734 | */ | |
735 | ||
e1a479c5 BB |
736 | /* NOTE: No support for tied ISA */ |
737 | ||
c6afe666 | 738 | PERL_STATIC_INLINE GV* |
739 | S_gv_fetchmeth_internal(pTHX_ HV* stash, SV* meth, const char* name, STRLEN len, I32 level, U32 flags) | |
79072805 | 740 | { |
463ee0b2 | 741 | GV** gvp; |
c6afe666 | 742 | HE* he; |
e1a479c5 BB |
743 | AV* linear_av; |
744 | SV** linear_svp; | |
745 | SV* linear_sv; | |
aae43805 | 746 | HV* cstash, *cachestash; |
e1a479c5 BB |
747 | GV* candidate = NULL; |
748 | CV* cand_cv = NULL; | |
e1a479c5 | 749 | GV* topgv = NULL; |
bfcb3514 | 750 | const char *hvname; |
448aac91 | 751 | STRLEN hvnamelen; |
c6afe666 | 752 | I32 create = (level >= 0) ? HV_FETCH_LVALUE : 0; |
e1a479c5 | 753 | I32 items; |
e1a479c5 | 754 | U32 topgen_cmp; |
04f3bf56 | 755 | U32 is_utf8 = flags & SVf_UTF8; |
a0d0e21e | 756 | |
af09ea45 IK |
757 | /* UNIVERSAL methods should be callable without a stash */ |
758 | if (!stash) { | |
1604cfb0 MS |
759 | create = 0; /* probably appropriate */ |
760 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) | |
761 | return 0; | |
af09ea45 IK |
762 | } |
763 | ||
e1a479c5 BB |
764 | assert(stash); |
765 | ||
bfcb3514 | 766 | hvname = HvNAME_get(stash); |
448aac91 | 767 | hvnamelen = HvNAMELEN_get(stash); |
bfcb3514 | 768 | if (!hvname) |
e1a479c5 | 769 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 770 | |
e1a479c5 | 771 | assert(hvname); |
55df6700 | 772 | assert(name || meth); |
463ee0b2 | 773 | |
aae43805 | 774 | DEBUG_o( Perl_deb(aTHX_ "Looking for %smethod %s in package %s\n", |
1604cfb0 MS |
775 | flags & GV_SUPER ? "SUPER " : "", |
776 | name ? name : SvPV_nolen(meth), hvname) ); | |
44a8e56a | 777 | |
dd69841b | 778 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 | 779 | |
aae43805 | 780 | if (flags & GV_SUPER) { |
1604cfb0 MS |
781 | if (!HvAUX(stash)->xhv_mro_meta->super) |
782 | HvAUX(stash)->xhv_mro_meta->super = newHV(); | |
783 | cachestash = HvAUX(stash)->xhv_mro_meta->super; | |
aae43805 FC |
784 | } |
785 | else cachestash = stash; | |
786 | ||
e1a479c5 | 787 | /* check locally for a real method or a cache entry */ |
c6afe666 | 788 | he = (HE*)hv_common( |
1cde3371 | 789 | cachestash, meth, name, len, is_utf8 ? HVhek_UTF8 : 0, create, NULL, 0 |
c6afe666 | 790 | ); |
791 | if (he) gvp = (GV**)&HeVAL(he); | |
792 | else gvp = NULL; | |
793 | ||
e1a479c5 BB |
794 | if(gvp) { |
795 | topgv = *gvp; | |
0f8d4b5e | 796 | have_gv: |
e1a479c5 BB |
797 | assert(topgv); |
798 | if (SvTYPE(topgv) != SVt_PVGV) | |
55df6700 FC |
799 | { |
800 | if (!name) | |
801 | name = SvPV_nomg(meth, len); | |
04ec7e59 | 802 | gv_init_pvn(topgv, stash, name, len, GV_ADDMULTI|is_utf8); |
55df6700 | 803 | } |
e1a479c5 BB |
804 | if ((cand_cv = GvCV(topgv))) { |
805 | /* If genuine method or valid cache entry, use it */ | |
806 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
807 | return topgv; | |
808 | } | |
809 | else { | |
810 | /* stale cache entry, junk it and move on */ | |
1604cfb0 MS |
811 | SvREFCNT_dec_NN(cand_cv); |
812 | GvCV_set(topgv, NULL); | |
813 | cand_cv = NULL; | |
814 | GvCVGEN(topgv) = 0; | |
e1a479c5 BB |
815 | } |
816 | } | |
817 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
818 | /* cache indicates no such method definitively */ | |
819 | return 0; | |
820 | } | |
1604cfb0 MS |
821 | else if (stash == cachestash |
822 | && len > 1 /* shortest is uc */ | |
b59bf0b2 | 823 | && memEQs(hvname, HvNAMELEN_get(stash), "CORE") |
87566176 | 824 | && S_maybe_add_coresub(aTHX_ NULL,topgv,name,len)) |
1604cfb0 | 825 | goto have_gv; |
463ee0b2 | 826 | } |
79072805 | 827 | |
aae43805 | 828 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ |
e1a479c5 BB |
829 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
830 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
831 | while (items--) { | |
832 | linear_sv = *linear_svp++; | |
833 | assert(linear_sv); | |
834 | cstash = gv_stashsv(linear_sv, 0); | |
835 | ||
dd69841b | 836 | if (!cstash) { |
448aac91 MM |
837 | if ( ckWARN(WARN_SYNTAX)) { |
838 | if( /* these are loaded from Perl_Gv_AMupdate() one way or another */ | |
839 | ( len && name[0] == '(' ) /* overload.pm related, in particular "()" */ | |
840 | || ( memEQs( name, len, "DESTROY") ) | |
841 | ) { | |
842 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), | |
843 | "Can't locate package %" SVf " for @%" HEKf "::ISA", | |
844 | SVfARG(linear_sv), | |
845 | HEKfARG(HvNAME_HEK(stash))); | |
846 | ||
847 | } else if( memEQs( name, len, "AUTOLOAD") ) { | |
848 | /* gobble this warning */ | |
849 | } else { | |
850 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), | |
851 | "While trying to resolve method call %.*s->%.*s()" | |
320be181 KW |
852 | " can not locate package \"%" SVf "\" yet it is mentioned in @%.*s::ISA" |
853 | " (perhaps you forgot to load \"%" SVf "\"?)", | |
29a3370f N |
854 | (int) hvnamelen, hvname, |
855 | (int) len, name, | |
448aac91 | 856 | SVfARG(linear_sv), |
29a3370f | 857 | (int) hvnamelen, hvname, |
448aac91 MM |
858 | SVfARG(linear_sv)); |
859 | } | |
860 | } | |
e1a479c5 BB |
861 | continue; |
862 | } | |
9607fc9c | 863 | |
e1a479c5 BB |
864 | assert(cstash); |
865 | ||
202cd98a SA |
866 | gvp = (GV**)hv_common( |
867 | cstash, meth, name, len, is_utf8 ? HVhek_UTF8 : 0, HV_FETCH_JUST_SV, NULL, 0 | |
868 | ); | |
0f8d4b5e FC |
869 | if (!gvp) { |
870 | if (len > 1 && HvNAMELEN_get(cstash) == 4) { | |
871 | const char *hvname = HvNAME(cstash); assert(hvname); | |
c8b388b0 | 872 | if (strBEGINs(hvname, "CORE") |
0f8d4b5e | 873 | && (candidate = |
87566176 | 874 | S_maybe_add_coresub(aTHX_ cstash,NULL,name,len) |
0f8d4b5e FC |
875 | )) |
876 | goto have_candidate; | |
877 | } | |
878 | continue; | |
879 | } | |
880 | else candidate = *gvp; | |
881 | have_candidate: | |
e1a479c5 | 882 | assert(candidate); |
04f3bf56 | 883 | if (SvTYPE(candidate) != SVt_PVGV) |
04ec7e59 | 884 | gv_init_pvn(candidate, cstash, name, len, GV_ADDMULTI|is_utf8); |
e1a479c5 BB |
885 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { |
886 | /* | |
887 | * Found real method, cache method in topgv if: | |
888 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
889 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
890 | */ | |
891 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
892 | CV *old_cv = GvCV(topgv); |
893 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 894 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 895 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
896 | GvCVGEN(topgv) = topgen_cmp; |
897 | } | |
1604cfb0 | 898 | return candidate; |
e1a479c5 BB |
899 | } |
900 | } | |
9607fc9c | 901 | |
e1a479c5 | 902 | /* Check UNIVERSAL without caching */ |
5f65868c | 903 | if((level == 0 || level == -1) && !(flags & GV_NOUNIVERSAL)) { |
55df6700 FC |
904 | candidate = gv_fetchmeth_internal(NULL, meth, name, len, 1, |
905 | flags &~GV_SUPER); | |
e1a479c5 BB |
906 | if(candidate) { |
907 | cand_cv = GvCV(candidate); | |
908 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
909 | CV *old_cv = GvCV(topgv); |
910 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 911 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 912 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
913 | GvCVGEN(topgv) = topgen_cmp; |
914 | } | |
915 | return candidate; | |
916 | } | |
917 | } | |
918 | ||
919 | if (topgv && GvREFCNT(topgv) == 1) { | |
920 | /* cache the fact that the method is not defined */ | |
921 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
922 | } |
923 | ||
79072805 LW |
924 | return 0; |
925 | } | |
926 | ||
c6afe666 | 927 | GV * |
928 | Perl_gv_fetchmeth_pvn(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) | |
929 | { | |
930 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN; | |
931 | return gv_fetchmeth_internal(stash, NULL, name, len, level, flags); | |
932 | } | |
933 | ||
954c1994 | 934 | /* |
460e5730 FC |
935 | =for apidoc gv_fetchmeth_autoload |
936 | ||
937 | This is the old form of L</gv_fetchmeth_pvn_autoload>, which has no flags | |
938 | parameter. | |
939 | ||
d21989ed | 940 | =for apidoc gv_fetchmeth_sv_autoload |
611c1e95 | 941 | |
d21989ed BF |
942 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes the name string in the form |
943 | of an SV instead of a string/length pair. | |
944 | ||
945 | =cut | |
946 | */ | |
947 | ||
948 | GV * | |
949 | Perl_gv_fetchmeth_sv_autoload(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
950 | { | |
951 | char *namepv; | |
952 | STRLEN namelen; | |
953 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV_AUTOLOAD; | |
954 | namepv = SvPV(namesv, namelen); | |
955 | if (SvUTF8(namesv)) | |
956 | flags |= SVf_UTF8; | |
957 | return gv_fetchmeth_pvn_autoload(stash, namepv, namelen, level, flags); | |
958 | } | |
959 | ||
960 | /* | |
961 | =for apidoc gv_fetchmeth_pv_autoload | |
962 | ||
963 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes a nul-terminated string | |
964 | instead of a string/length pair. | |
965 | ||
966 | =cut | |
967 | */ | |
968 | ||
969 | GV * | |
970 | Perl_gv_fetchmeth_pv_autoload(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
971 | { | |
972 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV_AUTOLOAD; | |
973 | return gv_fetchmeth_pvn_autoload(stash, name, strlen(name), level, flags); | |
974 | } | |
975 | ||
976 | /* | |
977 | =for apidoc gv_fetchmeth_pvn_autoload | |
978 | ||
796b6530 | 979 | Same as C<gv_fetchmeth_pvn()>, but looks for autoloaded subroutines too. |
611c1e95 IZ |
980 | Returns a glob for the subroutine. |
981 | ||
982 | For an autoloaded subroutine without a GV, will create a GV even | |
796b6530 | 983 | if C<level < 0>. For an autoloaded subroutine without a stub, C<GvCV()> |
611c1e95 IZ |
984 | of the result may be zero. |
985 | ||
796b6530 | 986 | Currently, the only significant value for C<flags> is C<SVf_UTF8>. |
d21989ed | 987 | |
611c1e95 IZ |
988 | =cut |
989 | */ | |
990 | ||
991 | GV * | |
d21989ed | 992 | Perl_gv_fetchmeth_pvn_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) |
611c1e95 | 993 | { |
499321d3 | 994 | GV *gv = gv_fetchmeth_pvn(stash, name, len, level, flags); |
611c1e95 | 995 | |
d21989ed | 996 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN_AUTOLOAD; |
7918f24d | 997 | |
611c1e95 | 998 | if (!gv) { |
1604cfb0 MS |
999 | CV *cv; |
1000 | GV **gvp; | |
1001 | ||
1002 | if (!stash) | |
1003 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ | |
1004 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) | |
1005 | return NULL; | |
1006 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, flags))) | |
1007 | return NULL; | |
1008 | cv = GvCV(gv); | |
1009 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
1010 | return NULL; | |
1011 | /* Have an autoload */ | |
1012 | if (level < 0) /* Cannot do without a stub */ | |
1013 | gv_fetchmeth_pvn(stash, name, len, 0, flags); | |
1014 | gvp = (GV**)hv_fetch(stash, name, | |
c60dbbc3 | 1015 | (flags & SVf_UTF8) ? -(I32)len : (I32)len, (level >= 0)); |
1604cfb0 MS |
1016 | if (!gvp) |
1017 | return NULL; | |
1018 | return *gvp; | |
611c1e95 IZ |
1019 | } |
1020 | return gv; | |
1021 | } | |
1022 | ||
1023 | /* | |
954c1994 GS |
1024 | =for apidoc gv_fetchmethod_autoload |
1025 | ||
1026 | Returns the glob which contains the subroutine to call to invoke the method | |
1027 | on the C<stash>. In fact in the presence of autoloading this may be the | |
796b6530 | 1028 | glob for "AUTOLOAD". In this case the corresponding variable C<$AUTOLOAD> is |
b267980d | 1029 | already setup. |
954c1994 GS |
1030 | |
1031 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
1032 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 1033 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 1034 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 1035 | with a non-zero C<autoload> parameter. |
954c1994 | 1036 | |
cec2d7b1 FC |
1037 | These functions grant C<"SUPER"> token |
1038 | as a prefix of the method name. Note | |
954c1994 GS |
1039 | that if you want to keep the returned glob for a long time, you need to |
1040 | check for it being "AUTOLOAD", since at the later time the call may load a | |
796b6530 | 1041 | different subroutine due to C<$AUTOLOAD> changing its value. Use the glob |
cec2d7b1 | 1042 | created as a side effect to do this. |
954c1994 | 1043 | |
cec2d7b1 FC |
1044 | These functions have the same side-effects as C<gv_fetchmeth> with |
1045 | C<level==0>. The warning against passing the GV returned by | |
1046 | C<gv_fetchmeth> to C<call_sv> applies equally to these functions. | |
954c1994 GS |
1047 | |
1048 | =cut | |
1049 | */ | |
1050 | ||
dc848c6f | 1051 | GV * |
864dbfa3 | 1052 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 1053 | { |
547bb267 NC |
1054 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
1055 | ||
256d1bb2 NC |
1056 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
1057 | } | |
1058 | ||
44130a26 BF |
1059 | GV * |
1060 | Perl_gv_fetchmethod_sv_flags(pTHX_ HV *stash, SV *namesv, U32 flags) | |
1061 | { | |
1062 | char *namepv; | |
1063 | STRLEN namelen; | |
1064 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_SV_FLAGS; | |
1065 | namepv = SvPV(namesv, namelen); | |
1066 | if (SvUTF8(namesv)) | |
1067 | flags |= SVf_UTF8; | |
1068 | return gv_fetchmethod_pvn_flags(stash, namepv, namelen, flags); | |
1069 | } | |
1070 | ||
1071 | GV * | |
1072 | Perl_gv_fetchmethod_pv_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
1073 | { | |
1074 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PV_FLAGS; | |
1075 | return gv_fetchmethod_pvn_flags(stash, name, strlen(name), flags); | |
1076 | } | |
1077 | ||
256d1bb2 | 1078 | GV * |
44130a26 | 1079 | Perl_gv_fetchmethod_pvn_flags(pTHX_ HV *stash, const char *name, const STRLEN len, U32 flags) |
256d1bb2 | 1080 | { |
65308f87 YO |
1081 | const char * const origname = name; |
1082 | const char * const name_end = name + len; | |
e2cace1e | 1083 | const char *last_separator = NULL; |
a0d0e21e | 1084 | GV* gv; |
0dae17bd | 1085 | HV* ostash = stash; |
ad64d0ec | 1086 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 NC |
1087 | const U32 autoload = flags & GV_AUTOLOAD; |
1088 | const U32 do_croak = flags & GV_CROAK; | |
14d1dfbd | 1089 | const U32 is_utf8 = flags & SVf_UTF8; |
0dae17bd | 1090 | |
44130a26 | 1091 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PVN_FLAGS; |
7918f24d | 1092 | |
eff494dd | 1093 | if (SvTYPE(stash) < SVt_PVHV) |
1604cfb0 | 1094 | stash = NULL; |
c9bf4021 | 1095 | else { |
1604cfb0 MS |
1096 | /* The only way stash can become NULL later on is if last_separator is set, |
1097 | which in turn means that there is no need for a SVt_PVHV case | |
1098 | the error reporting code. */ | |
c9bf4021 | 1099 | } |
b267980d | 1100 | |
cfb73676 YO |
1101 | { |
1102 | /* check if the method name is fully qualified or | |
1103 | * not, and separate the package name from the actual | |
1104 | * method name. | |
1105 | * | |
1106 | * leaves last_separator pointing to the beginning of the | |
1107 | * last package separator (either ' or ::) or 0 | |
1108 | * if none was found. | |
1109 | * | |
1110 | * leaves name pointing at the beginning of the | |
1111 | * method name. | |
1112 | */ | |
1113 | const char *name_cursor = name; | |
1114 | const char * const name_em1 = name_end - 1; /* name_end minus 1 */ | |
1115 | for (name_cursor = name; name_cursor < name_end ; name_cursor++) { | |
1116 | if (*name_cursor == '\'') { | |
1117 | last_separator = name_cursor; | |
1118 | name = name_cursor + 1; | |
1119 | } | |
1120 | else if (name_cursor < name_em1 && *name_cursor == ':' && name_cursor[1] == ':') { | |
1121 | last_separator = name_cursor++; | |
1122 | name = name_cursor + 1; | |
1123 | } | |
1124 | } | |
a0d0e21e | 1125 | } |
cfb73676 YO |
1126 | |
1127 | /* did we find a separator? */ | |
e2cace1e | 1128 | if (last_separator) { |
9b7f107c YO |
1129 | STRLEN sep_len= last_separator - origname; |
1130 | if ( memEQs(origname, sep_len, "SUPER")) { | |
1604cfb0 MS |
1131 | /* ->SUPER::method should really be looked up in original stash */ |
1132 | stash = CopSTASH(PL_curcop); | |
1133 | flags |= GV_SUPER; | |
1134 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", | |
1135 | origname, HvENAME_get(stash), name) ); | |
1136 | } | |
47324b4e | 1137 | else if ( sep_len >= 7 && |
1604cfb0 | 1138 | strBEGINs(last_separator - 7, "::SUPER")) { |
aae43805 | 1139 | /* don't autovifify if ->NoSuchStash::SUPER::method */ |
9b7f107c | 1140 | stash = gv_stashpvn(origname, sep_len - 7, is_utf8); |
1604cfb0 MS |
1141 | if (stash) flags |= GV_SUPER; |
1142 | } | |
1143 | else { | |
af09ea45 | 1144 | /* don't autovifify if ->NoSuchStash::method */ |
9b7f107c | 1145 | stash = gv_stashpvn(origname, sep_len, is_utf8); |
1604cfb0 MS |
1146 | } |
1147 | ostash = stash; | |
4633a7c4 LW |
1148 | } |
1149 | ||
65308f87 | 1150 | gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags); |
a0d0e21e | 1151 | if (!gv) { |
1604cfb0 MS |
1152 | /* This is the special case that exempts Foo->import and |
1153 | Foo->unimport from being an error even if there's no | |
1154 | import/unimport subroutine */ | |
1155 | if (strEQ(name,"import") || strEQ(name,"unimport")) { | |
1156 | gv = (GV*)sv_2mortal((SV*)newCONSTSUB_flags(NULL, | |
1157 | NULL, 0, 0, NULL)); | |
1158 | } else if (autoload) | |
1159 | gv = gv_autoload_pvn( | |
1160 | ostash, name, name_end - name, GV_AUTOLOAD_ISMETHOD|flags | |
1161 | ); | |
1162 | if (!gv && do_croak) { | |
1163 | /* Right now this is exclusively for the benefit of S_method_common | |
1164 | in pp_hot.c */ | |
1165 | if (stash) { | |
1166 | /* If we can't find an IO::File method, it might be a call on | |
1167 | * a filehandle. If IO:File has not been loaded, try to | |
1168 | * require it first instead of croaking */ | |
1169 | const char *stash_name = HvNAME_get(stash); | |
1170 | if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File") | |
1171 | && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL, | |
1172 | STR_WITH_LEN("IO/File.pm"), 0, | |
1173 | HV_FETCH_ISEXISTS, NULL, 0) | |
1174 | ) { | |
1175 | require_pv("IO/File.pm"); | |
1176 | gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags); | |
1177 | if (gv) | |
1178 | return gv; | |
1179 | } | |
1180 | Perl_croak(aTHX_ | |
1181 | "Can't locate object method \"%" UTF8f | |
1182 | "\" via package \"%" HEKf "\"", | |
1183 | UTF8fARG(is_utf8, name_end - name, name), | |
d0c0e7dd | 1184 | HEKfARG(HvNAME_HEK(stash))); |
1604cfb0 MS |
1185 | } |
1186 | else { | |
ecad31f0 | 1187 | SV* packnamesv; |
256d1bb2 | 1188 | |
1604cfb0 MS |
1189 | if (last_separator) { |
1190 | packnamesv = newSVpvn_flags(origname, last_separator - origname, | |
ecad31f0 | 1191 | SVs_TEMP | is_utf8); |
1604cfb0 MS |
1192 | } else { |
1193 | packnamesv = error_report; | |
1194 | } | |
1195 | ||
1196 | Perl_croak(aTHX_ | |
1197 | "Can't locate object method \"%" UTF8f | |
1198 | "\" via package \"%" SVf "\"" | |
1199 | " (perhaps you forgot to load \"%" SVf "\"?)", | |
1200 | UTF8fARG(is_utf8, name_end - name, name), | |
ecad31f0 | 1201 | SVfARG(packnamesv), SVfARG(packnamesv)); |
1604cfb0 MS |
1202 | } |
1203 | } | |
463ee0b2 | 1204 | } |
dc848c6f | 1205 | else if (autoload) { |
1604cfb0 MS |
1206 | CV* const cv = GvCV(gv); |
1207 | if (!CvROOT(cv) && !CvXSUB(cv)) { | |
1208 | GV* stubgv; | |
1209 | GV* autogv; | |
1210 | ||
1211 | if (CvANON(cv) || CvLEXICAL(cv)) | |
1212 | stubgv = gv; | |
1213 | else { | |
1214 | stubgv = CvGV(cv); | |
1215 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
1216 | stubgv = gv; | |
1217 | } | |
c8416c26 BF |
1218 | autogv = gv_autoload_pvn(GvSTASH(stubgv), |
1219 | GvNAME(stubgv), GvNAMELEN(stubgv), | |
1220 | GV_AUTOLOAD_ISMETHOD | |
1221 | | (GvNAMEUTF8(stubgv) ? SVf_UTF8 : 0)); | |
1604cfb0 MS |
1222 | if (autogv) |
1223 | gv = autogv; | |
1224 | } | |
dc848c6f | 1225 | } |
44a8e56a | 1226 | |
1227 | return gv; | |
1228 | } | |
1229 | ||
1230 | GV* | |
0eeb01b9 | 1231 | Perl_gv_autoload_sv(pTHX_ HV *stash, SV* namesv, U32 flags) |
5fba3c91 BF |
1232 | { |
1233 | char *namepv; | |
1234 | STRLEN namelen; | |
0fe84f7c | 1235 | PERL_ARGS_ASSERT_GV_AUTOLOAD_SV; |
5fba3c91 BF |
1236 | namepv = SvPV(namesv, namelen); |
1237 | if (SvUTF8(namesv)) | |
1238 | flags |= SVf_UTF8; | |
0eeb01b9 | 1239 | return gv_autoload_pvn(stash, namepv, namelen, flags); |
5fba3c91 BF |
1240 | } |
1241 | ||
1242 | GV* | |
0eeb01b9 | 1243 | Perl_gv_autoload_pv(pTHX_ HV *stash, const char *namepv, U32 flags) |
5fba3c91 | 1244 | { |
0fe84f7c | 1245 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PV; |
0eeb01b9 | 1246 | return gv_autoload_pvn(stash, namepv, strlen(namepv), flags); |
5fba3c91 BF |
1247 | } |
1248 | ||
1249 | GV* | |
0eeb01b9 | 1250 | Perl_gv_autoload_pvn(pTHX_ HV *stash, const char *name, STRLEN len, U32 flags) |
44a8e56a | 1251 | { |
44a8e56a | 1252 | GV* gv; |
1253 | CV* cv; | |
1254 | HV* varstash; | |
1255 | GV* vargv; | |
1256 | SV* varsv; | |
c8416c26 BF |
1257 | SV *packname = NULL; |
1258 | U32 is_utf8 = flags & SVf_UTF8 ? SVf_UTF8 : 0; | |
44a8e56a | 1259 | |
0fe84f7c | 1260 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PVN; |
7918f24d | 1261 | |
7edbdc6b | 1262 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
1604cfb0 | 1263 | return NULL; |
0dae17bd | 1264 | if (stash) { |
1604cfb0 | 1265 | if (SvTYPE(stash) < SVt_PVHV) { |
c8416c26 BF |
1266 | STRLEN packname_len = 0; |
1267 | const char * const packname_ptr = SvPV_const(MUTABLE_SV(stash), packname_len); | |
1268 | packname = newSVpvn_flags(packname_ptr, packname_len, | |
1269 | SVs_TEMP | SvUTF8(stash)); | |
1604cfb0 MS |
1270 | stash = NULL; |
1271 | } | |
1272 | else | |
1273 | packname = sv_2mortal(newSVhek(HvNAME_HEK(stash))); | |
1274 | if (flags & GV_SUPER) sv_catpvs(packname, "::SUPER"); | |
0dae17bd | 1275 | } |
257dc59d | 1276 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, |
1604cfb0 MS |
1277 | is_utf8 | (flags & GV_SUPER)))) |
1278 | return NULL; | |
dc848c6f | 1279 | cv = GvCV(gv); |
1280 | ||
adb5a9ae | 1281 | if (!(CvROOT(cv) || CvXSUB(cv))) |
1604cfb0 | 1282 | return NULL; |
ed850460 | 1283 | |
dc848c6f | 1284 | /* |
64278e8c | 1285 | * Inheriting AUTOLOAD for non-methods no longer works |
dc848c6f | 1286 | */ |
0eeb01b9 FC |
1287 | if ( |
1288 | !(flags & GV_AUTOLOAD_ISMETHOD) | |
1289 | && (GvCVGEN(gv) || GvSTASH(gv) != stash) | |
041457d9 | 1290 | ) |
64278e8c A |
1291 | Perl_croak(aTHX_ "Use of inherited AUTOLOAD for non-method %" SVf |
1292 | "::%" UTF8f "() is no longer allowed", | |
1604cfb0 | 1293 | SVfARG(packname), |
b17a0679 | 1294 | UTF8fARG(is_utf8, len, name)); |
44a8e56a | 1295 | |
aed2304a | 1296 | if (CvISXSUB(cv)) { |
bb619f37 FC |
1297 | /* Instead of forcing the XSUB do another lookup for $AUTOLOAD |
1298 | * and split that value on the last '::', pass along the same data | |
1299 | * via the SvPVX field in the CV, and the stash in CvSTASH. | |
8fa6a409 FC |
1300 | * |
1301 | * Due to an unfortunate accident of history, the SvPVX field | |
e1fa07e3 | 1302 | * serves two purposes. It is also used for the subroutine's pro- |
8fa6a409 FC |
1303 | * type. Since SvPVX has been documented as returning the sub name |
1304 | * for a long time, but not as returning the prototype, we have | |
1305 | * to preserve the SvPVX AUTOLOAD behaviour and put the prototype | |
1306 | * elsewhere. | |
1307 | * | |
1308 | * We put the prototype in the same allocated buffer, but after | |
1309 | * the sub name. The SvPOK flag indicates the presence of a proto- | |
1310 | * type. The CvAUTOLOAD flag indicates the presence of a sub name. | |
1311 | * If both flags are on, then SvLEN is used to indicate the end of | |
1312 | * the prototype (artificially lower than what is actually allo- | |
1313 | * cated), at the risk of having to reallocate a few bytes unneces- | |
1314 | * sarily--but that should happen very rarely, if ever. | |
1315 | * | |
1316 | * We use SvUTF8 for both prototypes and sub names, so if one is | |
1317 | * UTF8, the other must be upgraded. | |
adb5a9ae | 1318 | */ |
1604cfb0 MS |
1319 | CvSTASH_set(cv, stash); |
1320 | if (SvPOK(cv)) { /* Ouch! */ | |
1321 | SV * const tmpsv = newSVpvn_flags(name, len, is_utf8); | |
1322 | STRLEN ulen; | |
1323 | const char *proto = CvPROTO(cv); | |
1324 | assert(proto); | |
1325 | if (SvUTF8(cv)) | |
1326 | sv_utf8_upgrade_flags_grow(tmpsv, 0, CvPROTOLEN(cv) + 2); | |
1327 | ulen = SvCUR(tmpsv); | |
1328 | SvCUR_set(tmpsv, SvCUR(tmpsv) + 1); /* include null in string */ | |
1329 | sv_catpvn_flags( | |
1330 | tmpsv, proto, CvPROTOLEN(cv), SV_CATBYTES*!SvUTF8(cv) | |
1331 | ); | |
1332 | SvTEMP_on(tmpsv); /* Allow theft */ | |
1333 | sv_setsv_nomg((SV *)cv, tmpsv); | |
1334 | SvTEMP_off(tmpsv); | |
1335 | SvREFCNT_dec_NN(tmpsv); | |
1336 | SvLEN_set(cv, SvCUR(cv) + 1); | |
1337 | SvCUR_set(cv, ulen); | |
1338 | } | |
1339 | else { | |
1340 | sv_setpvn((SV *)cv, name, len); | |
1341 | SvPOK_off(cv); | |
1342 | if (is_utf8) | |
c8416c26 | 1343 | SvUTF8_on(cv); |
1604cfb0 MS |
1344 | else SvUTF8_off(cv); |
1345 | } | |
1346 | CvAUTOLOAD_on(cv); | |
adb5a9ae | 1347 | } |
adb5a9ae | 1348 | |
44a8e56a | 1349 | /* |
1350 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
1351 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
1352 | * use that, but for lack of anything better we will use the sub's | |
1353 | * original package to look up $AUTOLOAD. | |
1354 | */ | |
18691622 | 1355 | varstash = CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv)); |
5c7983e5 | 1356 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
1357 | ENTER; |
1358 | ||
c69033f2 | 1359 | if (!isGV(vargv)) { |
1604cfb0 | 1360 | gv_init_pvn(vargv, varstash, S_autoload, S_autolen, 0); |
c69033f2 | 1361 | #ifdef PERL_DONT_CREATE_GVSV |
1604cfb0 | 1362 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
1363 | #endif |
1364 | } | |
3d35f11b | 1365 | LEAVE; |
e203899d | 1366 | varsv = GvSVn(vargv); |
4bac9ae4 CS |
1367 | SvTAINTED_off(varsv); /* previous $AUTOLOAD taint is obsolete */ |
1368 | /* XXX: this process is not careful to avoid extra magic gets and sets; tied $AUTOLOAD will get noise */ | |
c8416c26 | 1369 | sv_setsv(varsv, packname); |
396482e1 | 1370 | sv_catpvs(varsv, "::"); |
d40bf27b NC |
1371 | /* Ensure SvSETMAGIC() is called if necessary. In particular, to clear |
1372 | tainting if $FOO::AUTOLOAD was previously tainted, but is not now. */ | |
61a9130e | 1373 | sv_catpvn_flags( |
1604cfb0 MS |
1374 | varsv, name, len, |
1375 | SV_SMAGIC|(is_utf8 ? SV_CATUTF8 : SV_CATBYTES) | |
61a9130e | 1376 | ); |
c8416c26 BF |
1377 | if (is_utf8) |
1378 | SvUTF8_on(varsv); | |
a0d0e21e LW |
1379 | return gv; |
1380 | } | |
1381 | ||
44a2ac75 YO |
1382 | |
1383 | /* require_tie_mod() internal routine for requiring a module | |
486ec47a | 1384 | * that implements the logic of automatic ties like %! and %- |
e94ea821 FC |
1385 | * It loads the module and then calls the _tie_it subroutine |
1386 | * with the passed gv as an argument. | |
44a2ac75 YO |
1387 | * |
1388 | * The "gv" parameter should be the glob. | |
ee33cc1a | 1389 | * "varname" holds the 1-char name of the var, used for error messages. |
45cbc99a | 1390 | * "namesv" holds the module name. Its refcount will be decremented. |
45cbc99a | 1391 | * "flags": if flag & 1 then save the scalar before loading. |
44a2ac75 YO |
1392 | * For the protection of $! to work (it is set by this routine) |
1393 | * the sv slot must already be magicalized. | |
d2c93421 | 1394 | */ |
e94ea821 | 1395 | STATIC void |
ee33cc1a | 1396 | S_require_tie_mod(pTHX_ GV *gv, const char varname, const char * name, |
a1683482 | 1397 | STRLEN len, const U32 flags) |
d2c93421 | 1398 | { |
e94ea821 | 1399 | const SV * const target = varname == '[' ? GvSV(gv) : (SV *)GvHV(gv); |
45cbc99a | 1400 | |
7918f24d NC |
1401 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
1402 | ||
e94ea821 FC |
1403 | /* If it is not tied */ |
1404 | if (!target || !SvRMAGICAL(target) | |
1405 | || !mg_find(target, | |
1406 | varname == '[' ? PERL_MAGIC_tiedscalar : PERL_MAGIC_tied)) | |
1407 | { | |
1408 | HV *stash; | |
1409 | GV **gvp; | |
1410 | dSP; | |
1411 | ||
655f5b26 | 1412 | PUSHSTACKi(PERLSI_MAGIC); |
e94ea821 | 1413 | ENTER; |
e94ea821 | 1414 | |
6881372e FC |
1415 | #define GET_HV_FETCH_TIE_FUNC \ |
1416 | ( (gvp = (GV **)hv_fetchs(stash, "_tie_it", 0)) \ | |
1417 | && *gvp \ | |
1418 | && ( (isGV(*gvp) && GvCV(*gvp)) \ | |
1419 | || (SvROK(*gvp) && SvTYPE(SvRV(*gvp)) == SVt_PVCV) ) \ | |
1420 | ) | |
e94ea821 FC |
1421 | |
1422 | /* Load the module if it is not loaded. */ | |
360cebfd | 1423 | if (!(stash = gv_stashpvn(name, len, 0)) |
6881372e | 1424 | || ! GET_HV_FETCH_TIE_FUNC) |
e94ea821 | 1425 | { |
1604cfb0 MS |
1426 | SV * const module = newSVpvn(name, len); |
1427 | const char type = varname == '[' ? '$' : '%'; | |
1428 | if ( flags & 1 ) | |
1429 | save_scalar(gv); | |
1430 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); | |
1431 | assert(sp == PL_stack_sp); | |
1432 | stash = gv_stashpvn(name, len, 0); | |
1433 | if (!stash) | |
1434 | Perl_croak(aTHX_ "panic: Can't use %c%c because %s is not available", | |
1435 | type, varname, name); | |
1436 | else if (! GET_HV_FETCH_TIE_FUNC) | |
1437 | Perl_croak(aTHX_ "panic: Can't use %c%c because %s does not define _tie_it", | |
1438 | type, varname, name); | |
e94ea821 FC |
1439 | } |
1440 | /* Now call the tie function. It should be in *gvp. */ | |
6881372e | 1441 | assert(gvp); assert(*gvp); |
e94ea821 FC |
1442 | PUSHMARK(SP); |
1443 | XPUSHs((SV *)gv); | |
1444 | PUTBACK; | |
1445 | call_sv((SV *)*gvp, G_VOID|G_DISCARD); | |
1446 | LEAVE; | |
655f5b26 | 1447 | POPSTACK; |
d2c93421 RH |
1448 | } |
1449 | } | |
1450 | ||
7c719134 YO |
1451 | /* add a require_tie_mod_s - the _s suffix is similar to pvs type suffixes, |
1452 | * IOW it means we do STR_WITH_LEN() ourselves and the user should pass in | |
1453 | * a true string WITHOUT a len. | |
1454 | */ | |
1455 | #define require_tie_mod_s(gv, varname, name, flags) \ | |
1456 | S_require_tie_mod(aTHX_ gv, varname, STR_WITH_LEN(name), flags) | |
1457 | ||
954c1994 GS |
1458 | /* |
1459 | =for apidoc gv_stashpv | |
1460 | ||
da51bb9b | 1461 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 1462 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
1463 | |
1464 | =cut | |
1465 | */ | |
1466 | ||
a0d0e21e | 1467 | HV* |
864dbfa3 | 1468 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 1469 | { |
7918f24d | 1470 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 1471 | return gv_stashpvn(name, strlen(name), create); |
1472 | } | |
1473 | ||
bc96cb06 SH |
1474 | /* |
1475 | =for apidoc gv_stashpvn | |
1476 | ||
da51bb9b NC |
1477 | Returns a pointer to the stash for a specified package. The C<namelen> |
1478 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
1479 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
1480 | created if it does not already exist. If the package does not exist and | |
796b6530 | 1481 | C<flags> is 0 (or any other setting that does not create packages) then C<NULL> |
da51bb9b NC |
1482 | is returned. |
1483 | ||
566a4718 YO |
1484 | Flags may be one of: |
1485 | ||
52e47e22 KW |
1486 | GV_ADD Create and initialize the package if doesn't |
1487 | already exist | |
1488 | GV_NOADD_NOINIT Don't create the package, | |
1489 | GV_ADDMG GV_ADD iff the GV is magical | |
1490 | GV_NOINIT GV_ADD, but don't initialize | |
1491 | GV_NOEXPAND Don't expand SvOK() entries to PVGV | |
1492 | SVf_UTF8 The name is in UTF-8 | |
566a4718 | 1493 | |
796b6530 | 1494 | The most important of which are probably C<GV_ADD> and C<SVf_UTF8>. |
bc96cb06 | 1495 | |
808724c8 | 1496 | Note, use of C<gv_stashsv> instead of C<gv_stashpvn> where possible is strongly |
1497 | recommended for performance reasons. | |
1498 | ||
4f8d487a | 1499 | =for apidoc Amnh||GV_ADD |
5af38e47 KW |
1500 | =for apidoc Amnh||GV_NOADD_NOINIT |
1501 | =for apidoc Amnh||GV_NOINIT | |
1502 | =for apidoc Amnh||GV_NOEXPAND | |
1503 | =for apidoc Amnh||GV_ADDMG | |
1504 | =for apidoc Amnh||SVf_UTF8 | |
4f8d487a | 1505 | |
bc96cb06 SH |
1506 | =cut |
1507 | */ | |
1508 | ||
0eadbdad YO |
1509 | /* |
1510 | gv_stashpvn_internal | |
1511 | ||
1512 | Perform the internal bits of gv_stashsvpvn_cached. You could think of this | |
1513 | as being one half of the logic. Not to be called except from gv_stashsvpvn_cached(). | |
1514 | ||
1515 | */ | |
1516 | ||
4e7ebec5 | 1517 | PERL_STATIC_INLINE HV* |
0eadbdad | 1518 | S_gv_stashpvn_internal(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 1519 | { |
0cea0058 | 1520 | char smallbuf[128]; |
46fc3d4c | 1521 | char *tmpbuf; |
a0d0e21e LW |
1522 | HV *stash; |
1523 | GV *tmpgv; | |
add0ecde | 1524 | U32 tmplen = namelen + 2; |
dc437b57 | 1525 | |
0eadbdad | 1526 | PERL_ARGS_ASSERT_GV_STASHPVN_INTERNAL; |
7918f24d | 1527 | |
add0ecde | 1528 | if (tmplen <= sizeof smallbuf) |
1604cfb0 | 1529 | tmpbuf = smallbuf; |
46fc3d4c | 1530 | else |
1604cfb0 | 1531 | Newx(tmpbuf, tmplen, char); |
add0ecde VP |
1532 | Copy(name, tmpbuf, namelen, char); |
1533 | tmpbuf[namelen] = ':'; | |
1534 | tmpbuf[namelen+1] = ':'; | |
1535 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); | |
46fc3d4c | 1536 | if (tmpbuf != smallbuf) |
1604cfb0 | 1537 | Safefree(tmpbuf); |
d2fcb1d6 | 1538 | if (!tmpgv || !isGV_with_GP(tmpgv)) |
1604cfb0 | 1539 | return NULL; |
a0d0e21e | 1540 | stash = GvHV(tmpgv); |
1f656fcf | 1541 | if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL; |
9efb5c72 | 1542 | assert(stash); |
1f656fcf | 1543 | if (!HvNAME_get(stash)) { |
1604cfb0 | 1544 | hv_name_set(stash, name, namelen, flags & SVf_UTF8 ? SVf_UTF8 : 0 ); |
9c913148 | 1545 | |
1604cfb0 MS |
1546 | /* FIXME: This is a repeat of logic in gv_fetchpvn_flags */ |
1547 | /* If the containing stash has multiple effective | |
1548 | names, see that this one gets them, too. */ | |
1549 | if (HvAUX(GvSTASH(tmpgv))->xhv_name_count) | |
1550 | mro_package_moved(stash, NULL, tmpgv, 1); | |
1f656fcf | 1551 | } |
a0d0e21e | 1552 | return stash; |
463ee0b2 LW |
1553 | } |
1554 | ||
808724c8 | 1555 | /* |
85bf2e91 | 1556 | =for apidoc gv_stashsvpvn_cached |
808724c8 | 1557 | |
1558 | Returns a pointer to the stash for a specified package, possibly | |
85bf2e91 KW |
1559 | cached. Implements both L<perlapi/C<gv_stashpvn>> and |
1560 | L<perlapi/C<gv_stashsv>>. | |
808724c8 | 1561 | |
b8c7ef84 | 1562 | Requires one of either C<namesv> or C<namepv> to be non-null. |
808724c8 | 1563 | |
85bf2e91 KW |
1564 | If the flag C<GV_CACHE_ONLY> is set, return the stash only if found in the |
1565 | cache; see L<perlapi/C<gv_stashpvn>> for details on the other C<flags>. | |
808724c8 | 1566 | |
85bf2e91 KW |
1567 | Note it is strongly preferred for C<namesv> to be non-null, for performance |
1568 | reasons. | |
808724c8 | 1569 | |
85bf2e91 KW |
1570 | =for apidoc Emnh||GV_CACHE_ONLY |
1571 | ||
1572 | =cut | |
808724c8 | 1573 | */ |
1574 | ||
1575 | #define PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED \ | |
1576 | assert(namesv || name) | |
1577 | ||
c4b6b96d SA |
1578 | HV* |
1579 | Perl_gv_stashsvpvn_cached(pTHX_ SV *namesv, const char *name, U32 namelen, I32 flags) | |
4e7ebec5 | 1580 | { |
1581 | HV* stash; | |
808724c8 | 1582 | HE* he; |
1583 | ||
1584 | PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED; | |
1585 | ||
1586 | he = (HE *)hv_common( | |
1587 | PL_stashcache, namesv, name, namelen, | |
4e7ebec5 | 1588 | (flags & SVf_UTF8) ? HVhek_UTF8 : 0, 0, NULL, 0 |
1589 | ); | |
808724c8 | 1590 | |
78e4f28f DM |
1591 | if (he) { |
1592 | SV *sv = HeVAL(he); | |
1593 | HV *hv; | |
1594 | assert(SvIOK(sv)); | |
1595 | hv = INT2PTR(HV*, SvIVX(sv)); | |
1596 | assert(SvTYPE(hv) == SVt_PVHV); | |
1597 | return hv; | |
1598 | } | |
d283e876 | 1599 | else if (flags & GV_CACHE_ONLY) return NULL; |
4e7ebec5 | 1600 | |
808724c8 | 1601 | if (namesv) { |
1602 | if (SvOK(namesv)) { /* prevent double uninit warning */ | |
1603 | STRLEN len; | |
1604 | name = SvPV_const(namesv, len); | |
1605 | namelen = len; | |
1606 | flags |= SvUTF8(namesv); | |
1607 | } else { | |
1608 | name = ""; namelen = 0; | |
1609 | } | |
1610 | } | |
0eadbdad YO |
1611 | stash = gv_stashpvn_internal(name, namelen, flags); |
1612 | ||
4e7ebec5 | 1613 | if (stash && namelen) { |
1614 | SV* const ref = newSViv(PTR2IV(stash)); | |
0eadbdad | 1615 | (void)hv_store(PL_stashcache, name, |
4e7ebec5 | 1616 | (flags & SVf_UTF8) ? -(I32)namelen : (I32)namelen, ref, 0); |
1617 | } | |
808724c8 | 1618 | |
4e7ebec5 | 1619 | return stash; |
1620 | } | |
1621 | ||
808724c8 | 1622 | HV* |
1623 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) | |
1624 | { | |
1625 | PERL_ARGS_ASSERT_GV_STASHPVN; | |
1626 | return gv_stashsvpvn_cached(NULL, name, namelen, flags); | |
1627 | } | |
1628 | ||
954c1994 GS |
1629 | /* |
1630 | =for apidoc gv_stashsv | |
1631 | ||
fbe13c60 KW |
1632 | Returns a pointer to the stash for a specified package. See |
1633 | C<L</gv_stashpvn>>. | |
954c1994 | 1634 | |
fbe13c60 KW |
1635 | Note this interface is strongly preferred over C<gv_stashpvn> for performance |
1636 | reasons. | |
808724c8 | 1637 | |
954c1994 GS |
1638 | =cut |
1639 | */ | |
1640 | ||
a0d0e21e | 1641 | HV* |
da51bb9b | 1642 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 1643 | { |
7918f24d | 1644 | PERL_ARGS_ASSERT_GV_STASHSV; |
808724c8 | 1645 | return gv_stashsvpvn_cached(sv, NULL, 0, flags); |
a0d0e21e | 1646 | } |
463ee0b2 | 1647 | GV * |
3752a9fe | 1648 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 flags, const svtype sv_type) { |
7918f24d | 1649 | PERL_ARGS_ASSERT_GV_FETCHPV; |
3752a9fe | 1650 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), flags, sv_type); |
7a5fd60d NC |
1651 | } |
1652 | ||
1653 | GV * | |
fe9845cc | 1654 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 1655 | STRLEN len; |
77cb3b01 FC |
1656 | const char * const nambeg = |
1657 | SvPV_flags_const(name, len, flags & GV_NO_SVGMAGIC ? 0 : SV_GMAGIC); | |
7918f24d | 1658 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
1659 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
1660 | } | |
1661 | ||
90aeefb4 | 1662 | PERL_STATIC_INLINE void |
290a1700 | 1663 | S_gv_magicalize_isa(pTHX_ GV *gv) |
ad7cce9f FR |
1664 | { |
1665 | AV* av; | |
1666 | ||
1667 | PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA; | |
1668 | ||
1669 | av = GvAVn(gv); | |
1670 | GvMULTI_on(gv); | |
1671 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, | |
1604cfb0 | 1672 | NULL, 0); |
ad7cce9f FR |
1673 | } |
1674 | ||
90aeefb4 BF |
1675 | /* This function grabs name and tries to split a stash and glob |
1676 | * from its contents. TODO better description, comments | |
9c913148 | 1677 | * |
90aeefb4 BF |
1678 | * If the function returns TRUE and 'name == name_end', then |
1679 | * 'gv' can be directly returned to the caller of gv_fetchpvn_flags | |
1680 | */ | |
1681 | PERL_STATIC_INLINE bool | |
1682 | S_parse_gv_stash_name(pTHX_ HV **stash, GV **gv, const char **name, | |
1683 | STRLEN *len, const char *nambeg, STRLEN full_len, | |
1684 | const U32 is_utf8, const I32 add) | |
1685 | { | |
8c573bee | 1686 | char *tmpfullbuf = NULL; /* only malloc one big chunk of memory when the smallbuff is not large enough */ |
90aeefb4 BF |
1687 | const char *name_cursor; |
1688 | const char *const name_end = nambeg + full_len; | |
1689 | const char *const name_em1 = name_end - 1; | |
8c573bee | 1690 | char smallbuf[64]; /* small buffer to avoid a malloc when possible */ |
90aeefb4 BF |
1691 | |
1692 | PERL_ARGS_ASSERT_PARSE_GV_STASH_NAME; | |
9c913148 | 1693 | |
7a207065 KW |
1694 | if ( full_len > 2 |
1695 | && **name == '*' | |
1696 | && isIDFIRST_lazy_if_safe(*name + 1, name_end, is_utf8)) | |
1697 | { | |
90aeefb4 BF |
1698 | /* accidental stringify on a GV? */ |
1699 | (*name)++; | |
1700 | } | |
1701 | ||
1702 | for (name_cursor = *name; name_cursor < name_end; name_cursor++) { | |
1703 | if (name_cursor < name_em1 && | |
1704 | ((*name_cursor == ':' && name_cursor[1] == ':') | |
1705 | || *name_cursor == '\'')) | |
1706 | { | |
1707 | if (!*stash) | |
1708 | *stash = PL_defstash; | |
1709 | if (!*stash || !SvREFCNT(*stash)) /* symbol table under destruction */ | |
657ed7c1 | 1710 | goto notok; |
90aeefb4 BF |
1711 | |
1712 | *len = name_cursor - *name; | |
1713 | if (name_cursor > nambeg) { /* Skip for initial :: or ' */ | |
1714 | const char *key; | |
1715 | GV**gvp; | |
1716 | if (*name_cursor == ':') { | |
1717 | key = *name; | |
1718 | *len += 2; | |
1719 | } | |
f8ac814f | 1720 | else { /* using ' for package separator */ |
8c573bee N |
1721 | /* use our pre-allocated buffer when possible to save a malloc */ |
1722 | char *tmpbuf; | |
1723 | if ( *len+2 <= sizeof smallbuf) | |
1724 | tmpbuf = smallbuf; | |
1725 | else { | |
1726 | /* only malloc once if needed */ | |
1727 | if (tmpfullbuf == NULL) /* only malloc&free once, a little more than needed */ | |
1728 | Newx(tmpfullbuf, full_len+2, char); | |
1729 | tmpbuf = tmpfullbuf; | |
1730 | } | |
90aeefb4 BF |
1731 | Copy(*name, tmpbuf, *len, char); |
1732 | tmpbuf[(*len)++] = ':'; | |
1733 | tmpbuf[(*len)++] = ':'; | |
1734 | key = tmpbuf; | |
1735 | } | |
c161da64 | 1736 | gvp = (GV**)hv_fetch(*stash, key, is_utf8 ? -((I32)*len) : (I32)*len, add); |
90aeefb4 | 1737 | *gv = gvp ? *gvp : NULL; |
f8ac814f | 1738 | if (!*gv || *gv == (const GV *)&PL_sv_undef) { |
657ed7c1 | 1739 | goto notok; |
f8ac814f N |
1740 | } |
1741 | /* here we know that *gv && *gv != &PL_sv_undef */ | |
1742 | if (SvTYPE(*gv) != SVt_PVGV) | |
1743 | gv_init_pvn(*gv, *stash, key, *len, (add & GV_ADDMULTI)|is_utf8); | |
1744 | else | |
1745 | GvMULTI_on(*gv); | |
90aeefb4 BF |
1746 | |
1747 | if (!(*stash = GvHV(*gv))) { | |
1748 | *stash = GvHV(*gv) = newHV(); | |
1749 | if (!HvNAME_get(*stash)) { | |
1750 | if (GvSTASH(*gv) == PL_defstash && *len == 6 | |
c8b388b0 | 1751 | && strBEGINs(*name, "CORE")) |
4c4f3c46 | 1752 | hv_name_sets(*stash, "CORE", 0); |
90aeefb4 BF |
1753 | else |
1754 | hv_name_set( | |
1755 | *stash, nambeg, name_cursor-nambeg, is_utf8 | |
1756 | ); | |
1757 | /* If the containing stash has multiple effective | |
1758 | names, see that this one gets them, too. */ | |
1759 | if (HvAUX(GvSTASH(*gv))->xhv_name_count) | |
1760 | mro_package_moved(*stash, NULL, *gv, 1); | |
1761 | } | |
1762 | } | |
1763 | else if (!HvNAME_get(*stash)) | |
1764 | hv_name_set(*stash, nambeg, name_cursor - nambeg, is_utf8); | |
1765 | } | |
1766 | ||
1767 | if (*name_cursor == ':') | |
1768 | name_cursor++; | |
1769 | *name = name_cursor+1; | |
1770 | if (*name == name_end) { | |
120921ac | 1771 | if (!*gv) { |
1604cfb0 MS |
1772 | *gv = MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); |
1773 | if (SvTYPE(*gv) != SVt_PVGV) { | |
1774 | gv_init_pvn(*gv, PL_defstash, "main::", 6, | |
1775 | GV_ADDMULTI); | |
1776 | GvHV(*gv) = | |
1777 | MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash)); | |
1778 | } | |
1779 | } | |
657ed7c1 | 1780 | goto ok; |
90aeefb4 BF |
1781 | } |
1782 | } | |
1783 | } | |
1784 | *len = name_cursor - *name; | |
657ed7c1 DM |
1785 | ok: |
1786 | Safefree(tmpfullbuf); /* free our tmpfullbuf if it was used */ | |
90aeefb4 | 1787 | return TRUE; |
657ed7c1 DM |
1788 | notok: |
1789 | Safefree(tmpfullbuf); /* free our tmpfullbuf if it was used */ | |
1790 | return FALSE; | |
90aeefb4 BF |
1791 | } |
1792 | ||
657ed7c1 | 1793 | |
536d1a88 | 1794 | /* Checks if an unqualified name is in the main stash */ |
90aeefb4 | 1795 | PERL_STATIC_INLINE bool |
536d1a88 | 1796 | S_gv_is_in_main(pTHX_ const char *name, STRLEN len, const U32 is_utf8) |
90aeefb4 | 1797 | { |
536d1a88 | 1798 | PERL_ARGS_ASSERT_GV_IS_IN_MAIN; |
9c913148 | 1799 | |
90aeefb4 | 1800 | /* If it's an alphanumeric variable */ |
7a207065 | 1801 | if ( len && isIDFIRST_lazy_if_safe(name, name + len, is_utf8) ) { |
90aeefb4 BF |
1802 | /* Some "normal" variables are always in main::, |
1803 | * like INC or STDOUT. | |
1804 | */ | |
1805 | switch (len) { | |
1806 | case 1: | |
1807 | if (*name == '_') | |
536d1a88 | 1808 | return TRUE; |
90aeefb4 BF |
1809 | break; |
1810 | case 3: | |
1811 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1812 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1813 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
536d1a88 | 1814 | return TRUE; |
90aeefb4 BF |
1815 | break; |
1816 | case 4: | |
1817 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1818 | && name[3] == 'V') | |
536d1a88 | 1819 | return TRUE; |
90aeefb4 BF |
1820 | break; |
1821 | case 5: | |
1822 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1823 | && name[3] == 'I' && name[4] == 'N') | |
536d1a88 | 1824 | return TRUE; |
90aeefb4 BF |
1825 | break; |
1826 | case 6: | |
1827 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1828 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1829 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
536d1a88 | 1830 | return TRUE; |
90aeefb4 BF |
1831 | break; |
1832 | case 7: | |
1833 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1834 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1835 | && name[6] == 'T') | |
536d1a88 | 1836 | return TRUE; |
90aeefb4 BF |
1837 | break; |
1838 | } | |
536d1a88 BF |
1839 | } |
1840 | /* *{""}, or a special variable like $@ */ | |
1841 | else | |
1842 | return TRUE; | |
9c913148 | 1843 | |
536d1a88 BF |
1844 | return FALSE; |
1845 | } | |
1846 | ||
1847 | ||
1848 | /* This function is called if parse_gv_stash_name() failed to | |
1849 | * find a stash, or if GV_NOTQUAL or an empty name was passed | |
1850 | * to gv_fetchpvn_flags. | |
9c913148 | 1851 | * |
536d1a88 BF |
1852 | * It returns FALSE if the default stash can't be found nor created, |
1853 | * which might happen during global destruction. | |
1854 | */ | |
1855 | PERL_STATIC_INLINE bool | |
1856 | S_find_default_stash(pTHX_ HV **stash, const char *name, STRLEN len, | |
1857 | const U32 is_utf8, const I32 add, | |
1858 | const svtype sv_type) | |
1859 | { | |
1860 | PERL_ARGS_ASSERT_FIND_DEFAULT_STASH; | |
9c913148 | 1861 | |
536d1a88 | 1862 | /* No stash in name, so see how we can default */ |
90aeefb4 | 1863 | |
536d1a88 BF |
1864 | if ( gv_is_in_main(name, len, is_utf8) ) { |
1865 | *stash = PL_defstash; | |
1866 | } | |
1867 | else { | |
1868 | if (IN_PERL_COMPILETIME) { | |
90aeefb4 BF |
1869 | *stash = PL_curstash; |
1870 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
1871 | sv_type != SVt_PVCV && | |
1872 | sv_type != SVt_PVGV && | |
1873 | sv_type != SVt_PVFM && | |
1874 | sv_type != SVt_PVIO && | |
1875 | !(len == 1 && sv_type == SVt_PV && | |
1876 | (*name == 'a' || *name == 'b')) ) | |
1877 | { | |
c161da64 | 1878 | GV**gvp = (GV**)hv_fetch(*stash,name,is_utf8 ? -(I32)len : (I32)len,0); |
90aeefb4 BF |
1879 | if (!gvp || *gvp == (const GV *)&PL_sv_undef || |
1880 | SvTYPE(*gvp) != SVt_PVGV) | |
1881 | { | |
1882 | *stash = NULL; | |
1883 | } | |
1884 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || | |
1885 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1886 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
1887 | { | |
1888 | /* diag_listed_as: Variable "%s" is not imported%s */ | |
1889 | Perl_ck_warner_d( | |
1890 | aTHX_ packWARN(WARN_MISC), | |
147e3846 | 1891 | "Variable \"%c%" UTF8f "\" is not imported", |
90aeefb4 BF |
1892 | sv_type == SVt_PVAV ? '@' : |
1893 | sv_type == SVt_PVHV ? '%' : '$', | |
1894 | UTF8fARG(is_utf8, len, name)); | |
1895 | if (GvCVu(*gvp)) | |
1896 | Perl_ck_warner_d( | |
1897 | aTHX_ packWARN(WARN_MISC), | |
147e3846 | 1898 | "\t(Did you mean &%" UTF8f " instead?)\n", |
90aeefb4 BF |
1899 | UTF8fARG(is_utf8, len, name) |
1900 | ); | |
1901 | *stash = NULL; | |
1902 | } | |
1903 | } | |
1904 | } | |
1905 | else { | |
1906 | /* Use the current op's stash */ | |
1907 | *stash = CopSTASH(PL_curcop); | |
1908 | } | |
1909 | } | |
90aeefb4 BF |
1910 | |
1911 | if (!*stash) { | |
1912 | if (add && !PL_in_clean_all) { | |
10860bf4 FC |
1913 | GV *gv; |
1914 | qerror(Perl_mess(aTHX_ | |
147e3846 | 1915 | "Global symbol \"%s%" UTF8f |
d8c6310a | 1916 | "\" requires explicit package name (did you forget to " |
147e3846 | 1917 | "declare \"my %s%" UTF8f "\"?)", |
d8c6310a FC |
1918 | (sv_type == SVt_PV ? "$" |
1919 | : sv_type == SVt_PVAV ? "@" | |
1920 | : sv_type == SVt_PVHV ? "%" | |
1921 | : ""), UTF8fARG(is_utf8, len, name), | |
90aeefb4 BF |
1922 | (sv_type == SVt_PV ? "$" |
1923 | : sv_type == SVt_PVAV ? "@" | |
1924 | : sv_type == SVt_PVHV ? "%" | |
10860bf4 | 1925 | : ""), UTF8fARG(is_utf8, len, name))); |
cd164bf8 BF |
1926 | /* To maintain the output of errors after the strict exception |
1927 | * above, and to keep compat with older releases, rather than | |
1928 | * placing the variables in the pad, we place | |
1929 | * them in the <none>:: stash. | |
1930 | */ | |
90aeefb4 BF |
1931 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
1932 | if (!gv) { | |
1933 | /* symbol table under destruction */ | |
1934 | return FALSE; | |
1935 | } | |
1936 | *stash = GvHV(gv); | |
1937 | } | |
1938 | else | |
1939 | return FALSE; | |
1940 | } | |
1941 | ||
1942 | if (!SvREFCNT(*stash)) /* symbol table under destruction */ | |
1943 | return FALSE; | |
1944 | ||
1945 | return TRUE; | |
1946 | } | |
1947 | ||
8c995aba FC |
1948 | /* gv_magicalize only turns on the SVf_READONLY flag, not SVf_PROTECT. So |
1949 | redefine SvREADONLY_on for that purpose. We don’t use it later on in | |
1950 | this file. */ | |
1951 | #undef SvREADONLY_on | |
1952 | #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY) | |
1953 | ||
930867a8 BF |
1954 | /* gv_magicalize() is called by gv_fetchpvn_flags when creating |
1955 | * a new GV. | |
1956 | * Note that it does not insert the GV into the stash prior to | |
1957 | * magicalization, which some variables require need in order | |
c22e17d0 | 1958 | * to work (like %+, %-, %!), so callers must take care of |
1321bbe3 | 1959 | * that. |
9c913148 | 1960 | * |
1321bbe3 FC |
1961 | * It returns true if the gv did turn out to be magical one; i.e., |
1962 | * if gv_magicalize actually did something. | |
930867a8 BF |
1963 | */ |
1964 | PERL_STATIC_INLINE bool | |
1965 | S_gv_magicalize(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, | |
1321bbe3 | 1966 | const svtype sv_type) |
79072805 | 1967 | { |
960b831f | 1968 | SSize_t paren; |
79072805 | 1969 | |
930867a8 | 1970 | PERL_ARGS_ASSERT_GV_MAGICALIZE; |
9c913148 | 1971 | |
44428a46 | 1972 | if (stash != PL_defstash) { /* not the main stash */ |
1604cfb0 MS |
1973 | /* We only have to check for a few names here: a, b, EXPORT, ISA |
1974 | and VERSION. All the others apply only to the main stash or to | |
1975 | CORE (which is checked right after this). */ | |
1976 | if (len) { | |
1977 | switch (*name) { | |
1978 | case 'E': | |
3092ee0c YO |
1979 | if ( |
1980 | len >= 6 && name[1] == 'X' && | |
1981 | (memEQs(name, len, "EXPORT") | |
eafd371c YO |
1982 | ||memEQs(name, len, "EXPORT_OK") |
1983 | ||memEQs(name, len, "EXPORT_FAIL") | |
3092ee0c | 1984 | ||memEQs(name, len, "EXPORT_TAGS")) |
eafd371c | 1985 | ) |
1604cfb0 MS |
1986 | GvMULTI_on(gv); |
1987 | break; | |
1988 | case 'I': | |
eafd371c | 1989 | if (memEQs(name, len, "ISA")) |
1604cfb0 MS |
1990 | gv_magicalize_isa(gv); |
1991 | break; | |
1992 | case 'V': | |
eafd371c | 1993 | if (memEQs(name, len, "VERSION")) |
1604cfb0 MS |
1994 | GvMULTI_on(gv); |
1995 | break; | |
1996 | case 'a': | |
eafd371c | 1997 | if (stash == PL_debstash && memEQs(name, len, "args")) { |
1604cfb0 MS |
1998 | GvMULTI_on(gv_AVadd(gv)); |
1999 | break; | |
eafd371c YO |
2000 | } |
2001 | /* FALLTHROUGH */ | |
1604cfb0 MS |
2002 | case 'b': |
2003 | if (len == 1 && sv_type == SVt_PV) | |
2004 | GvMULTI_on(gv); | |
2005 | /* FALLTHROUGH */ | |
2006 | default: | |
2007 | goto try_core; | |
2008 | } | |
2009 | goto ret; | |
2010 | } | |
4aaa4757 | 2011 | try_core: |
1604cfb0 MS |
2012 | if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) { |
2013 | /* Avoid null warning: */ | |
2014 | const char * const stashname = HvNAME(stash); assert(stashname); | |
2015 | if (strBEGINs(stashname, "CORE")) | |
2016 | S_maybe_add_coresub(aTHX_ 0, gv, name, len); | |
2017 | } | |
44428a46 FC |
2018 | } |
2019 | else if (len > 1) { | |
2020 | #ifndef EBCDIC | |
1604cfb0 MS |
2021 | if (*name > 'V' ) { |
2022 | NOOP; | |
2023 | /* Nothing else to do. | |
2024 | The compiler will probably turn the switch statement into a | |
2025 | branch table. Make sure we avoid even that small overhead for | |
2ae25f5c KW |
2026 | the common case of lower case variable names. (On EBCDIC |
2027 | platforms, we can't just do: | |
2028 | if (NATIVE_TO_ASCII(*name) > NATIVE_TO_ASCII('V') ) { | |
2029 | because cases like '\027' in the switch statement below are | |
2030 | C1 (non-ASCII) controls on those platforms, so the remapping | |
2031 | would make them larger than 'V') | |
2032 | */ | |
1604cfb0 | 2033 | } else |
44428a46 | 2034 | #endif |
1604cfb0 MS |
2035 | { |
2036 | switch (*name) { | |
2037 | case 'A': | |
eafd371c | 2038 | if (memEQs(name, len, "ARGV")) { |
1604cfb0 MS |
2039 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
2040 | } | |
eafd371c | 2041 | else if (memEQs(name, len, "ARGVOUT")) { |
1604cfb0 MS |
2042 | GvMULTI_on(gv); |
2043 | } | |
2044 | break; | |
2045 | case 'E': | |
3092ee0c YO |
2046 | if ( |
2047 | len >= 6 && name[1] == 'X' && | |
2048 | (memEQs(name, len, "EXPORT") | |
055ae706 YO |
2049 | ||memEQs(name, len, "EXPORT_OK") |
2050 | ||memEQs(name, len, "EXPORT_FAIL") | |
3092ee0c | 2051 | ||memEQs(name, len, "EXPORT_TAGS")) |
055ae706 | 2052 | ) |
1604cfb0 MS |
2053 | GvMULTI_on(gv); |
2054 | break; | |
2055 | case 'I': | |
eafd371c | 2056 | if (memEQs(name, len, "ISA")) { |
1604cfb0 MS |
2057 | gv_magicalize_isa(gv); |
2058 | } | |
2059 | break; | |
2060 | case 'S': | |
eafd371c | 2061 | if (memEQs(name, len, "SIG")) { |
1604cfb0 MS |
2062 | HV *hv; |
2063 | I32 i; | |
2064 | if (!PL_psig_name) { | |
2065 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); | |
2066 | Newxz(PL_psig_pend, SIG_SIZE, int); | |
2067 | PL_psig_ptr = PL_psig_name + SIG_SIZE; | |
2068 | } else { | |
2069 | /* I think that the only way to get here is to re-use an | |
2070 | embedded perl interpreter, where the previous | |
2071 | use didn't clean up fully because | |
2072 | PL_perl_destruct_level was 0. I'm not sure that we | |
2073 | "support" that, in that I suspect in that scenario | |
2074 | there are sufficient other garbage values left in the | |
2075 | interpreter structure that something else will crash | |
2076 | before we get here. I suspect that this is one of | |
2077 | those "doctor, it hurts when I do this" bugs. */ | |
2078 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); | |
2079 | Zero(PL_psig_pend, SIG_SIZE, int); | |
2080 | } | |
2081 | GvMULTI_on(gv); | |
2082 | hv = GvHVn(gv); | |
2083 | hv_magic(hv, NULL, PERL_MAGIC_sig); | |
2084 | for (i = 1; i < SIG_SIZE; i++) { | |
2085 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); | |
2086 | if (init) | |
2087 | sv_setsv(*init, &PL_sv_undef); | |
2088 | } | |
2089 | } | |
2090 | break; | |
2091 | case 'V': | |
eafd371c | 2092 | if (memEQs(name, len, "VERSION")) |
1604cfb0 MS |
2093 | GvMULTI_on(gv); |
2094 | break; | |
e5218da5 | 2095 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
eafd371c | 2096 | if (memEQs(name, len, "\003HILD_ERROR_NATIVE")) |
1604cfb0 | 2097 | goto magicalize; |
27deb0cf YO |
2098 | /* @{^CAPTURE} %{^CAPTURE} */ |
2099 | if (memEQs(name, len, "\003APTURE")) { | |
2100 | AV* const av = GvAVn(gv); | |
fa531f32 | 2101 | const Size_t n = *name; |
27deb0cf | 2102 | |
fa531f32 | 2103 | sv_magic(MUTABLE_SV(av), (SV*)n, PERL_MAGIC_regdata, NULL, 0); |
27deb0cf YO |
2104 | SvREADONLY_on(av); |
2105 | ||
d8422270 | 2106 | require_tie_mod_s(gv, '+', "Tie::Hash::NamedCapture",0); |
27deb0cf YO |
2107 | |
2108 | } else /* %{^CAPTURE_ALL} */ | |
2109 | if (memEQs(name, len, "\003APTURE_ALL")) { | |
d8422270 | 2110 | require_tie_mod_s(gv, '-', "Tie::Hash::NamedCapture",0); |
27deb0cf | 2111 | } |
1604cfb0 MS |
2112 | break; |
2113 | case '\005': /* $^ENCODING */ | |
eafd371c | 2114 | if (memEQs(name, len, "\005NCODING")) |
1604cfb0 MS |
2115 | goto magicalize; |
2116 | break; | |
2117 | case '\007': /* $^GLOBAL_PHASE */ | |
eafd371c | 2118 | if (memEQs(name, len, "\007LOBAL_PHASE")) |
1604cfb0 MS |
2119 | goto ro_magicalize; |
2120 | break; | |
2121 | case '\014': /* $^LAST_FH */ | |
eafd371c | 2122 | if (memEQs(name, len, "\014AST_FH")) |
1604cfb0 MS |
2123 | goto ro_magicalize; |
2124 | break; | |
cde0cee5 | 2125 | case '\015': /* $^MATCH */ |
eafd371c | 2126 | if (memEQs(name, len, "\015ATCH")) { |
960b831f NC |
2127 | paren = RX_BUFF_IDX_CARET_FULLMATCH; |
2128 | goto storeparen; | |
2129 | } | |
66230c86 | 2130 | break; |
1604cfb0 | 2131 | case '\017': /* $^OPEN */ |
eafd371c | 2132 | if (memEQs(name, len, "\017PEN")) |
1604cfb0 MS |
2133 | goto magicalize; |
2134 | break; | |
2135 | case '\020': /* $^PREMATCH $^POSTMATCH */ | |
eafd371c | 2136 | if (memEQs(name, len, "\020REMATCH")) { |
960b831f NC |
2137 | paren = RX_BUFF_IDX_CARET_PREMATCH; |
2138 | goto storeparen; | |
2139 | } | |
eafd371c | 2140 | if (memEQs(name, len, "\020OSTMATCH")) { |
960b831f NC |
2141 | paren = RX_BUFF_IDX_CARET_POSTMATCH; |
2142 | goto storeparen; | |
2143 | } | |
1604cfb0 | 2144 | break; |
f512d242 KW |
2145 | case '\023': |
2146 | if (memEQs(name, len, "\023AFE_LOCALES")) | |
1604cfb0 MS |
2147 | goto ro_magicalize; |
2148 | break; | |
2149 | case '\024': /* ${^TAINT} */ | |
eafd371c | 2150 | if (memEQs(name, len, "\024AINT")) |
1604cfb0 MS |
2151 | goto ro_magicalize; |
2152 | break; | |
2153 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ | |
eafd371c | 2154 | if (memEQs(name, len, "\025NICODE")) |
1604cfb0 | 2155 | goto ro_magicalize; |
eafd371c | 2156 | if (memEQs(name, len, "\025TF8LOCALE")) |
1604cfb0 | 2157 | goto ro_magicalize; |
eafd371c | 2158 | if (memEQs(name, len, "\025TF8CACHE")) |
1604cfb0 MS |
2159 | goto magicalize; |
2160 | break; | |
2161 | case '\027': /* $^WARNING_BITS */ | |
eafd371c | 2162 | if (memEQs(name, len, "\027ARNING_BITS")) |
1604cfb0 | 2163 | goto magicalize; |
8ca2a5d6 | 2164 | #ifdef WIN32 |
eafd371c | 2165 | else if (memEQs(name, len, "\027IN32_SLOPPY_STAT")) |
1604cfb0 | 2166 | goto magicalize; |
8ca2a5d6 | 2167 | #endif |
1604cfb0 MS |
2168 | break; |
2169 | case '1': | |
2170 | case '2': | |
2171 | case '3': | |
2172 | case '4': | |
2173 | case '5': | |
2174 | case '6': | |
2175 | case '7': | |
2176 | case '8': | |
2177 | case '9': | |
2178 | { | |
2179 | /* Ensures that we have an all-digit variable, ${"1foo"} fails | |
2180 | this test */ | |
22ff3130 HS |
2181 | UV uv; |
2182 | if (!grok_atoUV(name, &uv, NULL) || uv > I32_MAX) | |
1321bbe3 | 2183 | goto ret; |
22ff3130 HS |
2184 | /* XXX why are we using a SSize_t? */ |
2185 | paren = (SSize_t)(I32)uv; | |
960b831f | 2186 | goto storeparen; |
1604cfb0 MS |
2187 | } |
2188 | } | |
2189 | } | |
392db708 | 2190 | } else { |
1604cfb0 MS |
2191 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will |
2192 | be case '\0' in this switch statement (ie a default case) */ | |
2193 | switch (*name) { | |
2194 | case '&': /* $& */ | |
960b831f NC |
2195 | paren = RX_BUFF_IDX_FULLMATCH; |
2196 | goto sawampersand; | |
1604cfb0 | 2197 | case '`': /* $` */ |
960b831f NC |
2198 | paren = RX_BUFF_IDX_PREMATCH; |
2199 | goto sawampersand; | |
1604cfb0 | 2200 | case '\'': /* $' */ |
960b831f NC |
2201 | paren = RX_BUFF_IDX_POSTMATCH; |
2202 | sawampersand: | |
1a904fc8 | 2203 | #ifdef PERL_SAWAMPERSAND |
1604cfb0 MS |
2204 | if (!( |
2205 | sv_type == SVt_PVAV || | |
2206 | sv_type == SVt_PVHV || | |
2207 | sv_type == SVt_PVCV || | |
2208 | sv_type == SVt_PVFM || | |
2209 | sv_type == SVt_PVIO | |
2210 | )) { PL_sawampersand |= | |
d3b97530 DM |
2211 | (*name == '`') |
2212 | ? SAWAMPERSAND_LEFT | |
2213 | : (*name == '&') | |
2214 | ? SAWAMPERSAND_MIDDLE | |
2215 | : SAWAMPERSAND_RIGHT; | |
2216 | } | |
1a904fc8 | 2217 | #endif |
960b831f | 2218 | goto storeparen; |
e91d8259 NC |
2219 | case '1': /* $1 */ |
2220 | case '2': /* $2 */ | |
2221 | case '3': /* $3 */ | |
2222 | case '4': /* $4 */ | |
2223 | case '5': /* $5 */ | |
2224 | case '6': /* $6 */ | |
2225 | case '7': /* $7 */ | |
2226 | case '8': /* $8 */ | |
2227 | case '9': /* $9 */ | |
960b831f NC |
2228 | paren = *name - '0'; |
2229 | ||
2230 | storeparen: | |
e91d8259 NC |
2231 | /* Flag the capture variables with a NULL mg_ptr |
2232 | Use mg_len for the array index to lookup. */ | |
960b831f | 2233 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, NULL, paren); |
e91d8259 | 2234 | break; |
cc4c2da6 | 2235 | |
1604cfb0 MS |
2236 | case ':': /* $: */ |
2237 | sv_setpv(GvSVn(gv),PL_chopset); | |
2238 | goto magicalize; | |
cc4c2da6 | 2239 | |
1604cfb0 | 2240 | case '?': /* $? */ |
ff0cee69 | 2241 | #ifdef COMPLEX_STATUS |
1604cfb0 | 2242 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 2243 | #endif |
1604cfb0 | 2244 | goto magicalize; |
ff0cee69 | 2245 | |
1604cfb0 MS |
2246 | case '!': /* $! */ |
2247 | GvMULTI_on(gv); | |
2248 | /* If %! has been used, automatically load Errno.pm. */ | |
d2c93421 | 2249 | |
1604cfb0 | 2250 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 | 2251 | |
7c719134 | 2252 | /* magicalization must be done before require_tie_mod_s is called */ |
1604cfb0 | 2253 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
7c719134 | 2254 | require_tie_mod_s(gv, '!', "Errno", 1); |
d2c93421 | 2255 | |
1604cfb0 MS |
2256 | break; |
2257 | case '-': /* $-, %-, @- */ | |
2258 | case '+': /* $+, %+, @+ */ | |
27deb0cf YO |
2259 | GvMULTI_on(gv); /* no used once warnings here */ |
2260 | { /* $- $+ */ | |
2261 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
2262 | if (*name == '+') | |
2263 | SvREADONLY_on(GvSVn(gv)); | |
2264 | } | |
2265 | { /* %- %+ */ | |
2266 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
2267 | require_tie_mod_s(gv, *name, "Tie::Hash::NamedCapture",0); | |
2268 | } | |
2269 | { /* @- @+ */ | |
2270 | AV* const av = GvAVn(gv); | |
fa531f32 | 2271 | const Size_t n = *name; |
67261566 | 2272 | |
fa531f32 | 2273 | sv_magic(MUTABLE_SV(av), (SV*)n, PERL_MAGIC_regdata, NULL, 0); |
27deb0cf YO |
2274 | SvREADONLY_on(av); |
2275 | } | |
80305961 | 2276 | break; |
1604cfb0 MS |
2277 | case '*': /* $* */ |
2278 | case '#': /* $# */ | |
dcb414ac JK |
2279 | if (sv_type == SVt_PV) |
2280 | /* diag_listed_as: $* is no longer supported as of Perl 5.30 */ | |
2281 | Perl_croak(aTHX_ "$%c is no longer supported as of Perl 5.30", *name); | |
2282 | break; | |
1604cfb0 MS |
2283 | case '\010': /* $^H */ |
2284 | { | |
2285 | HV *const hv = GvHVn(gv); | |
2286 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
2287 | } | |
2288 | goto magicalize; | |
2289 | case '\023': /* $^S */ | |
2290 | ro_magicalize: | |
2291 | SvREADONLY_on(GvSVn(gv)); | |
2292 | /* FALLTHROUGH */ | |
2293 | case '0': /* $0 */ | |
2294 | case '^': /* $^ */ | |
2295 | case '~': /* $~ */ | |
2296 | case '=': /* $= */ | |
2297 | case '%': /* $% */ | |
2298 | case '.': /* $. */ | |
2299 | case '(': /* $( */ | |
2300 | case ')': /* $) */ | |
2301 | case '<': /* $< */ | |
2302 | case '>': /* $> */ | |
2303 | case '\\': /* $\ */ | |
2304 | case '/': /* $/ */ | |
2305 | case '|': /* $| */ | |
2306 | case '$': /* $$ */ | |
2307 | case '[': /* $[ */ | |
2308 | case '\001': /* $^A */ | |
2309 | case '\003': /* $^C */ | |
2310 | case '\004': /* $^D */ | |
2311 | case '\005': /* $^E */ | |
2312 | case '\006': /* $^F */ | |
2313 | case '\011': /* $^I, NOT \t in EBCDIC */ | |
2314 | case '\016': /* $^N */ | |
2315 | case '\017': /* $^O */ | |
2316 | case '\020': /* $^P */ | |
2317 | case '\024': /* $^T */ | |
2318 | case '\027': /* $^W */ | |
2319 | magicalize: | |
2320 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
2321 | break; | |
2322 | ||
2323 | case '\014': /* $^L */ | |
2324 | sv_setpvs(GvSVn(gv),"\f"); | |
2325 | break; | |
2326 | case ';': /* $; */ | |
2327 | sv_setpvs(GvSVn(gv),"\034"); | |
2328 | break; | |
2329 | case ']': /* $] */ | |
2330 | { | |
2331 | SV * const sv = GvSV(gv); | |
2332 | if (!sv_derived_from(PL_patchlevel, "version")) | |
2333 | upg_version(PL_patchlevel, TRUE); | |
2334 | GvSV(gv) = vnumify(PL_patchlevel); | |
2335 | SvREADONLY_on(GvSV(gv)); | |
2336 | SvREFCNT_dec(sv); | |
2337 | } | |
2338 | break; | |
2339 | case '\026': /* $^V */ | |
2340 | { | |
2341 | SV * const sv = GvSV(gv); | |
2342 | GvSV(gv) = new_version(PL_patchlevel); | |
2343 | SvREADONLY_on(GvSV(gv)); | |
2344 | SvREFCNT_dec(sv); | |
2345 | } | |
2346 | break; | |
2347 | case 'a': | |
2348 | case 'b': | |
2349 | if (sv_type == SVt_PV) | |
2350 | GvMULTI_on(gv); | |
2351 | } | |
79072805 | 2352 | } |
930867a8 | 2353 | |
1321bbe3 FC |
2354 | ret: |
2355 | /* Return true if we actually did something. */ | |
2356 | return GvAV(gv) || GvHV(gv) || GvIO(gv) || GvCV(gv) | |
2357 | || ( GvSV(gv) && ( | |
2358 | SvOK(GvSV(gv)) || SvMAGICAL(GvSV(gv)) | |
2359 | ) | |
2360 | ); | |
71c35c05 BF |
2361 | } |
2362 | ||
8c995aba FC |
2363 | /* If we do ever start using this later on in the file, we need to make |
2364 | sure we don’t accidentally use the wrong definition. */ | |
2365 | #undef SvREADONLY_on | |
2366 | ||
070dc475 BF |
2367 | /* This function is called when the stash already holds the GV of the magic |
2368 | * variable we're looking for, but we need to check that it has the correct | |
2369 | * kind of magic. For example, if someone first uses $! and then %!, the | |
2370 | * latter would end up here, and we add the Errno tie to the HASH slot of | |
2371 | * the *! glob. | |
2372 | */ | |
2373 | PERL_STATIC_INLINE void | |
2374 | S_maybe_multimagic_gv(pTHX_ GV *gv, const char *name, const svtype sv_type) | |
2375 | { | |
2376 | PERL_ARGS_ASSERT_MAYBE_MULTIMAGIC_GV; | |
2377 | ||
2378 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) { | |
2379 | if (*name == '!') | |
7c719134 | 2380 | require_tie_mod_s(gv, '!', "Errno", 1); |
070dc475 | 2381 | else if (*name == '-' || *name == '+') |
7c719134 | 2382 | require_tie_mod_s(gv, *name, "Tie::Hash::NamedCapture", 0); |
a678626e A |
2383 | } else if (sv_type == SVt_PV) { |
2384 | if (*name == '*' || *name == '#') { | |
dcb414ac JK |
2385 | /* diag_listed_as: $* is no longer supported as of Perl 5.30 */ |
2386 | Perl_croak(aTHX_ "$%c is no longer supported as of Perl 5.30", *name); | |
a678626e | 2387 | } |
070dc475 BF |
2388 | } |
2389 | if (sv_type==SVt_PV || sv_type==SVt_PVGV) { | |
2390 | switch (*name) { | |
070dc475 BF |
2391 | #ifdef PERL_SAWAMPERSAND |
2392 | case '`': | |
2393 | PL_sawampersand |= SAWAMPERSAND_LEFT; | |
2394 | (void)GvSVn(gv); | |
2395 | break; | |
2396 | case '&': | |
2397 | PL_sawampersand |= SAWAMPERSAND_MIDDLE; | |
2398 | (void)GvSVn(gv); | |
2399 | break; | |
2400 | case '\'': | |
2401 | PL_sawampersand |= SAWAMPERSAND_RIGHT; | |
2402 | (void)GvSVn(gv); | |
2403 | break; | |
2404 | #endif | |
2405 | } | |
2406 | } | |
2407 | } | |
2408 | ||
84ca0d82 KW |
2409 | /* |
2410 | =for apidoc gv_fetchpv | |
2411 | =for apidoc_item |GV *|gv_fetchpvn|const char * nambeg|STRLEN full_len|I32 flags|const svtype sv_type | |
2412 | =for apidoc_item ||gv_fetchpvn_flags | |
2413 | =for apidoc_item |GV *|gv_fetchpvs|"name"|I32 flags|const svtype sv_type | |
2414 | =for apidoc_item ||gv_fetchsv | |
2415 | =for apidoc_item |GV *|gv_fetchsv_nomg|SV *name|I32 flags|const svtype sv_type | |
2416 | ||
2417 | These all return the GV of type C<sv_type> whose name is given by the inputs, | |
2418 | or NULL if no GV of that name and type could be found. See L<perlguts/Stashes | |
2419 | and Globs>. | |
2420 | ||
2421 | The only differences are how the input name is specified, and if 'get' magic is | |
2422 | normally used in getting that name. | |
2423 | ||
2424 | Don't be fooled by the fact that only one form has C<flags> in its name. They | |
2425 | all have a C<flags> parameter in fact, and all the flag bits have the same | |
2426 | meanings for all | |
2427 | ||
2428 | If any of the flags C<GV_ADD>, C<GV_ADDMG>, C<GV_ADDWARN>, C<GV_ADDMULTI>, or | |
2429 | C<GV_NOINIT> is set, a GV is created if none already exists for the input name | |
2430 | and type. However, C<GV_ADDMG> will only do the creation for magical GV's. | |
2431 | For all of these flags except C<GV_NOINIT>, C<L</gv_init_pvn>> is called after | |
2432 | the addition. C<GV_ADDWARN> is used when the caller expects that adding won't | |
2433 | be necessary because the symbol should already exist; but if not, add it | |
2434 | anyway, with a warning that it was unexpectedly absent. The C<GV_ADDMULTI> | |
2435 | flag means to pretend that the GV has been seen before (I<i.e.>, suppress "Used | |
2436 | once" warnings). | |
2437 | ||
2438 | The flag C<GV_NOADD_NOINIT> causes C<L</gv_init_pvn>> not be to called if the | |
2439 | GV existed but isn't PVGV. | |
2440 | ||
2441 | If the C<SVf_UTF8> bit is set, the name is treated as being encoded in UTF-8; | |
2442 | otherwise the name won't be considered to be UTF-8 in the C<pv>-named forms, | |
2443 | and the UTF-8ness of the underlying SVs will be used in the C<sv> forms. | |
2444 | ||
2445 | If the flag C<GV_NOTQUAL> is set, the caller warrants that the input name is a | |
2446 | plain symbol name, not qualified with a package, otherwise the name is checked | |
2447 | for being a qualified one. | |
2448 | ||
2449 | In C<gv_fetchpv>, C<nambeg> is a C string, NUL-terminated with no intermediate | |
2450 | NULs. | |
2451 | ||
2452 | In C<gv_fetchpvs>, C<name> is a literal C string, hence is enclosed in | |
2453 | double quotes. | |
2454 | ||
2455 | C<gv_fetchpvn> and C<gv_fetchpvn_flags> are identical. In these, <nambeg> is | |
2456 | a Perl string whose byte length is given by C<full_len>, and may contain | |
2457 | embedded NULs. | |
2458 | ||
2459 | In C<gv_fetchsv> and C<gv_fetchsv_nomg>, the name is extracted from the PV of | |
2460 | the input C<name> SV. The only difference between these two forms is that | |
2461 | 'get' magic is normally done on C<name> in C<gv_fetchsv>, and always skipped | |
2462 | with C<gv_fetchsv_nomg>. Including C<GV_NO_SVGMAGIC> in the C<flags> parameter | |
2463 | to C<gv_fetchsv> makes it behave identically to C<gv_fetchsv_nomg>. | |
2464 | ||
2465 | =for apidoc Amnh||GV_ADD | |
2466 | =for apidoc Amnh||GV_ADDMG | |
2467 | =for apidoc Amnh||GV_ADDMULTI | |
2468 | =for apidoc Amnh||GV_ADDWARN | |
2469 | =for apidoc Amnh||GV_NOADD_NOINIT | |
2470 | =for apidoc Amnh||GV_NOINIT | |
2471 | =for apidoc Amnh||GV_NOTQUAL | |
2472 | =for apidoc Amnh||GV_NO_SVGMAGIC | |
2473 | =for apidoc Amnh||SVf_UTF8 | |
2474 | ||
2475 | =cut | |
2476 | */ | |
2477 | ||
71c35c05 BF |
2478 | GV * |
2479 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
1604cfb0 | 2480 | const svtype sv_type) |
71c35c05 | 2481 | { |
71c35c05 BF |
2482 | const char *name = nambeg; |
2483 | GV *gv = NULL; | |
2484 | GV**gvp; | |
2485 | STRLEN len; | |
2486 | HV *stash = NULL; | |
2487 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); | |
2488 | const I32 no_expand = flags & GV_NOEXPAND; | |
2489 | const I32 add = flags & ~GV_NOADD_MASK; | |
2490 | const U32 is_utf8 = flags & SVf_UTF8; | |
930867a8 | 2491 | bool addmg = cBOOL(flags & GV_ADDMG); |
71c35c05 BF |
2492 | const char *const name_end = nambeg + full_len; |
2493 | U32 faking_it; | |
2494 | ||
2495 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; | |
2496 | ||
2497 | /* If we have GV_NOTQUAL, the caller promised that | |
2498 | * there is no stash, so we can skip the check. | |
2499 | * Similarly if full_len is 0, since then we're | |
2500 | * dealing with something like *{""} or ""->foo() | |
2501 | */ | |
2502 | if ((flags & GV_NOTQUAL) || !full_len) { | |
2503 | len = full_len; | |
2504 | } | |
2505 | else if (parse_gv_stash_name(&stash, &gv, &name, &len, nambeg, full_len, is_utf8, add)) { | |
2506 | if (name == name_end) return gv; | |
2507 | } | |
2508 | else { | |
2509 | return NULL; | |
2510 | } | |
2511 | ||
2512 | if (!stash && !find_default_stash(&stash, name, len, is_utf8, add, sv_type)) { | |
2513 | return NULL; | |
2514 | } | |
9c913148 | 2515 | |
71c35c05 | 2516 | /* By this point we should have a stash and a name */ |
c161da64 | 2517 | gvp = (GV**)hv_fetch(stash,name,is_utf8 ? -(I32)len : (I32)len,add); |
71c35c05 | 2518 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) { |
1604cfb0 MS |
2519 | if (addmg) gv = (GV *)newSV(0); /* tentatively */ |
2520 | else return NULL; | |
71c35c05 BF |
2521 | } |
2522 | else gv = *gvp, addmg = 0; | |
2523 | /* From this point on, addmg means gv has not been inserted in the | |
2524 | symtab yet. */ | |
2525 | ||
2526 | if (SvTYPE(gv) == SVt_PVGV) { | |
c002ae9a BF |
2527 | /* The GV already exists, so return it, but check if we need to do |
2528 | * anything else with it before that. | |
2529 | */ | |
1604cfb0 | 2530 | if (add) { |
c002ae9a BF |
2531 | /* This is the heuristic that handles if a variable triggers the |
2532 | * 'used only once' warning. If there's already a GV in the stash | |
2533 | * with this name, then we assume that the variable has been used | |
2534 | * before and turn its MULTI flag on. | |
2535 | * It's a heuristic because it can easily be "tricked", like with | |
2536 | * BEGIN { $a = 1; $::{foo} = *a }; () = $foo | |
2537 | * not warning about $main::foo being used just once | |
2538 | */ | |
1604cfb0 MS |
2539 | GvMULTI_on(gv); |
2540 | gv_init_svtype(gv, sv_type); | |
71c35c05 BF |
2541 | /* You reach this path once the typeglob has already been created, |
2542 | either by the same or a different sigil. If this path didn't | |
2543 | exist, then (say) referencing $! first, and %! second would | |
2544 | mean that %! was not handled correctly. */ | |
1604cfb0 | 2545 | if (len == 1 && stash == PL_defstash) { |
070dc475 | 2546 | maybe_multimagic_gv(gv, name, sv_type); |
1604cfb0 | 2547 | } |
b59bf0b2 | 2548 | else if (sv_type == SVt_PVAV |
1604cfb0 MS |
2549 | && memEQs(name, len, "ISA") |
2550 | && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv)))) | |
2551 | gv_magicalize_isa(gv); | |
2552 | } | |
2553 | return gv; | |
71c35c05 | 2554 | } else if (no_init) { |
1604cfb0 MS |
2555 | assert(!addmg); |
2556 | return gv; | |
c002ae9a BF |
2557 | } |
2558 | /* If GV_NOEXPAND is true and what we got off the stash is a ref, | |
2559 | * don't expand it to a glob. This is an optimization so that things | |
2560 | * copying constants over, like Exporter, don't have to be rewritten | |
2561 | * to take into account that you can store more than just globs in | |
2562 | * stashes. | |
2563 | */ | |
2564 | else if (no_expand && SvROK(gv)) { | |
1604cfb0 MS |
2565 | assert(!addmg); |
2566 | return gv; | |
71c35c05 BF |
2567 | } |
2568 | ||
2569 | /* Adding a new symbol. | |
2570 | Unless of course there was already something non-GV here, in which case | |
2571 | we want to behave as if there was always a GV here, containing some sort | |
2572 | of subroutine. | |
2573 | Otherwise we run the risk of creating things like GvIO, which can cause | |
2574 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
2575 | ||
2576 | faking_it = SvOK(gv); | |
2577 | ||
2578 | if (add & GV_ADDWARN) | |
1604cfb0 MS |
2579 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
2580 | "Had to create %" UTF8f " unexpectedly", | |
2581 | UTF8fARG(is_utf8, name_end-nambeg, nambeg)); | |
71c35c05 BF |
2582 | gv_init_pvn(gv, stash, name, len, (add & GV_ADDMULTI)|is_utf8); |
2583 | ||
7a207065 KW |
2584 | if ( full_len != 0 |
2585 | && isIDFIRST_lazy_if_safe(name, name + full_len, is_utf8) | |
2586 | && !ckWARN(WARN_ONCE) ) | |
2587 | { | |
71c35c05 | 2588 | GvMULTI_on(gv) ; |
7a207065 | 2589 | } |
71c35c05 BF |
2590 | |
2591 | /* set up magic where warranted */ | |
1321bbe3 | 2592 | if ( gv_magicalize(gv, stash, name, len, sv_type) ) { |
930867a8 | 2593 | /* See 23496c6 */ |
1321bbe3 FC |
2594 | if (addmg) { |
2595 | /* gv_magicalize magicalised this gv, so we want it | |
930867a8 | 2596 | * stored in the symtab. |
9c913148 | 2597 | * Effectively the caller is asking, ‘Does this gv exist?’ |
1321bbe3 | 2598 | * And we respond, ‘Er, *now* it does!’ |
930867a8 BF |
2599 | */ |
2600 | (void)hv_store(stash,name,len,(SV *)gv,0); | |
1321bbe3 FC |
2601 | } |
2602 | } | |
2603 | else if (addmg) { | |
2604 | /* The temporary GV created above */ | |
930867a8 BF |
2605 | SvREFCNT_dec_NN(gv); |
2606 | gv = NULL; | |
930867a8 | 2607 | } |
9c913148 | 2608 | |
e6066781 | 2609 | if (gv) gv_init_svtype(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 | 2610 | return gv; |
79072805 LW |
2611 | } |
2612 | ||
2613 | void | |
35a4481c | 2614 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2615 | { |
ed60a868 | 2616 | const char *name; |
35a4481c | 2617 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
2618 | |
2619 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
2620 | ||
666ea192 | 2621 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 2622 | |
52a6327b | 2623 | if (hv && (name = HvNAME(hv))) { |
ed60a868 | 2624 | const STRLEN len = HvNAMELEN(hv); |
61e2287f | 2625 | if (keepmain || ! memBEGINs(name, len, "main")) { |
1604cfb0 MS |
2626 | sv_catpvn_flags(sv,name,len,HvNAMEUTF8(hv)?SV_CATUTF8:SV_CATBYTES); |
2627 | sv_catpvs(sv,"::"); | |
ed60a868 | 2628 | } |
43693395 | 2629 | } |
ed60a868 | 2630 | else sv_catpvs(sv,"__ANON__::"); |
04f3bf56 | 2631 | sv_catsv(sv,sv_2mortal(newSVhek(GvNAME_HEK(gv)))); |
43693395 GS |
2632 | } |
2633 | ||
2634 | void | |
35a4481c | 2635 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2636 | { |
099be4f1 | 2637 | const GV * const egv = GvEGVx(gv); |
7918f24d NC |
2638 | |
2639 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
2640 | ||
46c461b5 | 2641 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
2642 | } |
2643 | ||
39a65960 DM |
2644 | |
2645 | /* recursively scan a stash and any nested stashes looking for entries | |
2646 | * that need the "only used once" warning raised | |
2647 | */ | |
2648 | ||
79072805 | 2649 | void |
51da40ed | 2650 | Perl_gv_check(pTHX_ HV *stash) |
79072805 | 2651 | { |
eb578fdb | 2652 | I32 i; |
463ee0b2 | 2653 | |
7918f24d NC |
2654 | PERL_ARGS_ASSERT_GV_CHECK; |
2655 | ||
9e5cda6b | 2656 | if (!SvOOK(stash)) |
1604cfb0 | 2657 | return; |
90754377 | 2658 | |
9e5cda6b | 2659 | assert(HvARRAY(stash)); |
90754377 | 2660 | |
0cdaae3e NC |
2661 | /* mark stash is being scanned, to avoid recursing */ |
2662 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_SCAN_STASH; | |
a0d0e21e | 2663 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 2664 | const HE *entry; |
1604cfb0 | 2665 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
eb578fdb | 2666 | GV *gv; |
b7787f18 | 2667 | HV *hv; |
1604cfb0 | 2668 | STRLEN keylen = HeKLEN(entry); |
e7acdfe9 DM |
2669 | const char * const key = HeKEY(entry); |
2670 | ||
1604cfb0 MS |
2671 | if (keylen >= 2 && key[keylen-2] == ':' && key[keylen-1] == ':' && |
2672 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) | |
2673 | { | |
2674 | if (hv != PL_defstash && hv != stash | |
90754377 DM |
2675 | && !(SvOOK(hv) |
2676 | && (HvAUX(hv)->xhv_aux_flags & HvAUXf_SCAN_STASH)) | |
2677 | ) | |
1604cfb0 MS |
2678 | gv_check(hv); /* nested package */ |
2679 | } | |
7a207065 KW |
2680 | else if ( HeKLEN(entry) != 0 |
2681 | && *HeKEY(entry) != '_' | |
2682 | && isIDFIRST_lazy_if_safe(HeKEY(entry), | |
2683 | HeKEY(entry) + HeKLEN(entry), | |
2684 | HeUTF8(entry)) ) | |
2685 | { | |
e1ec3a88 | 2686 | const char *file; |
1604cfb0 MS |
2687 | gv = MUTABLE_GV(HeVAL(entry)); |
2688 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) | |
2689 | continue; | |
2690 | file = GvFILE(gv); | |
2691 | CopLINE_set(PL_curcop, GvLINE(gv)); | |
1dc74fdb | 2692 | #ifdef USE_ITHREADS |
1604cfb0 | 2693 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1dc74fdb | 2694 | #else |
1604cfb0 MS |
2695 | CopFILEGV(PL_curcop) |
2696 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
1dc74fdb | 2697 | #endif |
1604cfb0 MS |
2698 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
2699 | "Name \"%" HEKf "::%" HEKf | |
2700 | "\" used only once: possible typo", | |
d0c0e7dd FC |
2701 | HEKfARG(HvNAME_HEK(stash)), |
2702 | HEKfARG(GvNAME_HEK(gv))); | |
1604cfb0 MS |
2703 | } |
2704 | } | |
79072805 | 2705 | } |
0cdaae3e | 2706 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_SCAN_STASH; |
79072805 LW |
2707 | } |
2708 | ||
2709 | GV * | |
9cc50d5b | 2710 | Perl_newGVgen_flags(pTHX_ const char *pack, U32 flags) |
79072805 | 2711 | { |
9cc50d5b | 2712 | PERL_ARGS_ASSERT_NEWGVGEN_FLAGS; |
b17a0679 | 2713 | assert(!(flags & ~SVf_UTF8)); |
7918f24d | 2714 | |
147e3846 | 2715 | return gv_fetchpv(Perl_form(aTHX_ "%" UTF8f "::_GEN_%ld", |
b17a0679 | 2716 | UTF8fARG(flags, strlen(pack), pack), |
9cc50d5b BF |
2717 | (long)PL_gensym++), |
2718 | GV_ADD, SVt_PVGV); | |
79072805 LW |
2719 | } |
2720 | ||
2721 | /* hopefully this is only called on local symbol table entries */ | |
2722 | ||
2723 | GP* | |
864dbfa3 | 2724 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 2725 | { |
1d7c1841 | 2726 | if (!gp) |
1604cfb0 | 2727 | return NULL; |
79072805 | 2728 | gp->gp_refcnt++; |
44a8e56a | 2729 | if (gp->gp_cv) { |
1604cfb0 MS |
2730 | if (gp->gp_cvgen) { |
2731 | /* If the GP they asked for a reference to contains | |
e1a479c5 BB |
2732 | a method cache entry, clear it first, so that we |
2733 | don't infect them with our cached entry */ | |
1604cfb0 MS |
2734 | SvREFCNT_dec_NN(gp->gp_cv); |
2735 | gp->gp_cv = NULL; | |
2736 | gp->gp_cvgen = 0; | |
2737 | } | |
44a8e56a | 2738 | } |
79072805 | 2739 | return gp; |
79072805 LW |
2740 | } |
2741 | ||
2742 | void | |
864dbfa3 | 2743 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 2744 | { |
79072805 | 2745 | GP* gp; |
b0d55c99 | 2746 | int attempts = 100; |
2c205b54 | 2747 | bool in_global_destruction = PL_phase == PERL_PHASE_DESTRUCT; |
79072805 | 2748 | |
f7877b28 | 2749 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
1604cfb0 | 2750 | return; |
f248d071 | 2751 | if (gp->gp_refcnt == 0) { |
1604cfb0 MS |
2752 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
2753 | "Attempt to free unreferenced glob pointers" | |
2754 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
2755 | return; |
2756 | } | |
4571f4a7 | 2757 | if (gp->gp_refcnt > 1) { |
bc81b34d | 2758 | borrowed: |
1604cfb0 MS |
2759 | if (gp->gp_egv == gv) |
2760 | gp->gp_egv = 0; | |
2761 | gp->gp_refcnt--; | |
2762 | GvGP_set(gv, NULL); | |
79072805 | 2763 | return; |
748a9306 | 2764 | } |
79072805 | 2765 | |
b0d55c99 FC |
2766 | while (1) { |
2767 | /* Copy and null out all the glob slots, so destructors do not see | |
2768 | freed SVs. */ | |
2769 | HEK * const file_hek = gp->gp_file_hek; | |
2c205b54 NC |
2770 | SV * sv = gp->gp_sv; |
2771 | AV * av = gp->gp_av; | |
2772 | HV * hv = gp->gp_hv; | |
2773 | IO * io = gp->gp_io; | |
2774 | CV * cv = gp->gp_cv; | |
2775 | CV * form = gp->gp_form; | |
2776 | ||
2777 | int need = 0; | |
b0d55c99 FC |
2778 | |
2779 | gp->gp_file_hek = NULL; | |
2780 | gp->gp_sv = NULL; | |
2781 | gp->gp_av = NULL; | |
2782 | gp->gp_hv = NULL; | |
2783 | gp->gp_io = NULL; | |
2784 | gp->gp_cv = NULL; | |
2785 | gp->gp_form = NULL; | |
2786 | ||
2787 | if (file_hek) | |
1604cfb0 | 2788 | unshare_hek(file_hek); |
b0d55c99 | 2789 | |
2c205b54 NC |
2790 | /* Storing the SV on the temps stack (instead of freeing it immediately) |
2791 | is an admitted bodge that attempt to compensate for the lack of | |
2792 | reference counting on the stack. The motivation is that typeglob syntax | |
2793 | is extremely short hence programs such as '$a += (*a = 2)' are often | |
2794 | found randomly by researchers running fuzzers. Previously these | |
2795 | programs would trigger errors, that the researchers would | |
2796 | (legitimately) report, and then we would spend time figuring out that | |
2797 | the cause was "stack not reference counted" and so not a dangerous | |
2798 | security hole. This consumed a lot of researcher time, our time, and | |
2799 | prevents "interesting" security holes being uncovered. | |
2800 | ||
2801 | Typeglob assignment is rarely used in performance critical production | |
2802 | code, so we aren't causing much slowdown by doing extra work here. | |
2803 | ||
2804 | In turn, the need to check for SvOBJECT (and references to objects) is | |
2805 | because we have regression tests that rely on timely destruction that | |
2806 | happens *within this while loop* to demonstrate behaviour, and | |
2807 | potentially there is also *working* code in the wild that relies on | |
2808 | such behaviour. | |
2809 | ||
2810 | And we need to avoid doing this in global destruction else we can end | |
2811 | up with "Attempt to free temp prematurely ... Unbalanced string table | |
2812 | refcount". | |
2813 | ||
2814 | Hence the whole thing is a heuristic intended to mitigate against | |
2815 | simple problems likely found by fuzzers but never written by humans, | |
2816 | whilst leaving working code unchanged. */ | |
2817 | if (sv) { | |
2818 | SV *referant; | |
2819 | if (SvREFCNT(sv) > 1 || SvOBJECT(sv) || UNLIKELY(in_global_destruction)) { | |
2820 | SvREFCNT_dec_NN(sv); | |
2821 | sv = NULL; | |
2822 | } else if (SvROK(sv) && (referant = SvRV(sv)) | |
2823 | && (SvREFCNT(referant) > 1 || SvOBJECT(referant))) { | |
2824 | SvREFCNT_dec_NN(sv); | |
2825 | sv = NULL; | |
2826 | } else { | |
2827 | ++need; | |
2828 | } | |
2829 | } | |
2830 | if (av) { | |
2831 | if (SvREFCNT(av) > 1 || SvOBJECT(av) || UNLIKELY(in_global_destruction)) { | |
2832 | SvREFCNT_dec_NN(av); | |
2833 | av = NULL; | |
2834 | } else { | |
2835 | ++need; | |
2836 | } | |
2837 | } | |
b0d55c99 FC |
2838 | /* FIXME - another reference loop GV -> symtab -> GV ? |
2839 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
2840 | if (hv && SvTYPE(hv) == SVt_PVHV) { | |
c2242065 | 2841 | const HEK *hvname_hek = HvNAME_HEK(hv); |
923ed580 FC |
2842 | if (PL_stashcache && hvname_hek) { |
2843 | DEBUG_o(Perl_deb(aTHX_ | |
147e3846 | 2844 | "gp_free clearing PL_stashcache for '%" HEKf "'\n", |
923ed580 | 2845 | HEKfARG(hvname_hek))); |
0ca9877d | 2846 | (void)hv_deletehek(PL_stashcache, hvname_hek, G_DISCARD); |
923ed580 | 2847 | } |
2c205b54 NC |
2848 | if (SvREFCNT(hv) > 1 || SvOBJECT(hv) || UNLIKELY(in_global_destruction)) { |
2849 | SvREFCNT_dec_NN(hv); | |
2850 | hv = NULL; | |
2851 | } else { | |
2852 | ++need; | |
2853 | } | |
b0d55c99 | 2854 | } |
96d7c888 | 2855 | if (io && SvREFCNT(io) == 1 && IoIFP(io) |
1604cfb0 MS |
2856 | && (IoTYPE(io) == IoTYPE_WRONLY || |
2857 | IoTYPE(io) == IoTYPE_RDWR || | |
2858 | IoTYPE(io) == IoTYPE_APPEND) | |
2859 | && ckWARN_d(WARN_IO) | |
2860 | && IoIFP(io) != PerlIO_stdin() | |
2861 | && IoIFP(io) != PerlIO_stdout() | |
2862 | && IoIFP(io) != PerlIO_stderr() | |
2863 | && !(IoFLAGS(io) & IOf_FAKE_DIRP)) | |
2864 | io_close(io, gv, FALSE, TRUE); | |
2c205b54 NC |
2865 | if (io) { |
2866 | if (SvREFCNT(io) > 1 || SvOBJECT(io) || UNLIKELY(in_global_destruction)) { | |
2867 | SvREFCNT_dec_NN(io); | |
2868 | io = NULL; | |
2869 | } else { | |
2870 | ++need; | |
2871 | } | |
2872 | } | |
2873 | if (cv) { | |
2874 | if (SvREFCNT(cv) > 1 || SvOBJECT(cv) || UNLIKELY(in_global_destruction)) { | |
2875 | SvREFCNT_dec_NN(cv); | |
2876 | cv = NULL; | |
2877 | } else { | |
2878 | ++need; | |
2879 | } | |
2880 | } | |
2881 | if (form) { | |
2882 | if (SvREFCNT(form) > 1 || SvOBJECT(form) || UNLIKELY(in_global_destruction)) { | |
2883 | SvREFCNT_dec_NN(form); | |
2884 | form = NULL; | |
2885 | } else { | |
2886 | ++need; | |
2887 | } | |
2888 | } | |
2889 | ||
2890 | if (need) { | |
2891 | /* We don't strictly need to defer all this to the end, but it's | |
2892 | easiest to do so. The subtle problems we have are | |
2893 | 1) any of the actions triggered by the various SvREFCNT_dec()s in | |
2894 | any of the intermediate blocks can cause more items to be added | |
2895 | to the temps stack. So we can't "cache" its state locally | |
2896 | 2) We'd have to re-check the "extend by 1?" for each time. | |
2897 | Whereas if we don't NULL out the values that we want to put onto | |
2898 | the save stack until here, we can do it in one go, with one | |
2899 | one size check. */ | |
2900 | ||
2901 | SSize_t max_ix = PL_tmps_ix + need; | |
2902 | ||
2903 | if (max_ix >= PL_tmps_max) { | |
2904 | tmps_grow_p(max_ix); | |
2905 | } | |
2906 | ||
2907 | if (sv) { | |
2908 | PL_tmps_stack[++PL_tmps_ix] = sv; | |
2909 | } | |
2910 | if (av) { | |
2911 | PL_tmps_stack[++PL_tmps_ix] = (SV *) av; | |
2912 | } | |
2913 | if (hv) { | |
2914 | PL_tmps_stack[++PL_tmps_ix] = (SV *) hv; | |
2915 | } | |
2916 | if (io) { | |
2917 | PL_tmps_stack[++PL_tmps_ix] = (SV *) io; | |
2918 | } | |
2919 | if (cv) { | |
2920 | PL_tmps_stack[++PL_tmps_ix] = (SV *) cv; | |
2921 | } | |
2922 | if (form) { | |
2923 | PL_tmps_stack[++PL_tmps_ix] = (SV *) form; | |
2924 | } | |
2925 | } | |
b0d55c99 | 2926 | |
bc81b34d FC |
2927 | /* Possibly reallocated by a destructor */ |
2928 | gp = GvGP(gv); | |
2929 | ||
b0d55c99 FC |
2930 | if (!gp->gp_file_hek |
2931 | && !gp->gp_sv | |
2932 | && !gp->gp_av | |
2933 | && !gp->gp_hv | |
2934 | && !gp->gp_io | |
2935 | && !gp->gp_cv | |
2936 | && !gp->gp_form) break; | |
2937 | ||
2938 | if (--attempts == 0) { | |
1604cfb0 MS |
2939 | Perl_die(aTHX_ |
2940 | "panic: gp_free failed to free glob pointer - " | |
2941 | "something is repeatedly re-creating entries" | |
2942 | ); | |
b0d55c99 | 2943 | } |
13207a71 | 2944 | } |
748a9306 | 2945 | |
bc81b34d FC |
2946 | /* Possibly incremented by a destructor doing glob assignment */ |
2947 | if (gp->gp_refcnt > 1) goto borrowed; | |
79072805 | 2948 | Safefree(gp); |
c43ae56f | 2949 | GvGP_set(gv, NULL); |
79072805 LW |
2950 | } |
2951 | ||
d460ef45 NIS |
2952 | int |
2953 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
2954 | { | |
53c1dcc0 AL |
2955 | AMT * const amtp = (AMT*)mg->mg_ptr; |
2956 | PERL_UNUSED_ARG(sv); | |
dd374669 | 2957 | |
7918f24d NC |
2958 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
2959 | ||
d460ef45 | 2960 | if (amtp && AMT_AMAGIC(amtp)) { |
1604cfb0 MS |
2961 | int i; |
2962 | for (i = 1; i < NofAMmeth; i++) { | |
2963 | CV * const cv = amtp->table[i]; | |
2964 | if (cv) { | |
2965 | SvREFCNT_dec_NN(MUTABLE_SV(cv)); | |
2966 | amtp->table[i] = NULL; | |
2967 | } | |
2968 | } | |
d460ef45 NIS |
2969 | } |
2970 | return 0; | |
2971 | } | |
2972 | ||
a0d0e21e | 2973 | /* Updates and caches the CV's */ |
c3a9a790 RGS |
2974 | /* Returns: |
2975 | * 1 on success and there is some overload | |
2976 | * 0 if there is no overload | |
2977 | * -1 if some error occurred and it couldn't croak | |
2978 | */ | |
a0d0e21e | 2979 | |
c3a9a790 | 2980 | int |
242f8760 | 2981 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e | 2982 | { |
ad64d0ec | 2983 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 | 2984 | AMT amt; |
9b439311 | 2985 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 2986 | U32 newgen; |
a0d0e21e | 2987 | |
7918f24d NC |
2988 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
2989 | ||
9b439311 | 2990 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
2991 | if (mg) { |
2992 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
66978156 | 2993 | if (amtp->was_ok_sub == newgen) { |
1604cfb0 | 2994 | return AMT_AMAGIC(amtp) ? 1 : 0; |
14899595 | 2995 | } |
ad64d0ec | 2996 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 | 2997 | } |
a0d0e21e | 2998 | |
bfcb3514 | 2999 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 3000 | |
d460ef45 | 3001 | Zero(&amt,1,AMT); |
e1a479c5 | 3002 | amt.was_ok_sub = newgen; |
a6006777 | 3003 | amt.fallback = AMGfallNO; |
3004 | amt.flags = 0; | |
3005 | ||
a6006777 | 3006 | { |
8c34e50d FC |
3007 | int filled = 0; |
3008 | int i; | |
3d147ac2 DM |
3009 | bool deref_seen = 0; |
3010 | ||
a6006777 | 3011 | |
3866ea3b | 3012 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 3013 | |
89ffc314 | 3014 | /* Try to find via inheritance. */ |
e6919483 | 3015 | GV *gv = gv_fetchmeth_pvn(stash, PL_AMG_names[0], 2, -1, 0); |
3866ea3b | 3016 | SV * const sv = gv ? GvSV(gv) : NULL; |
53c1dcc0 | 3017 | CV* cv; |
89ffc314 IZ |
3018 | |
3019 | if (!gv) | |
3866ea3b FC |
3020 | { |
3021 | if (!gv_fetchmeth_pvn(stash, "((", 2, -1, 0)) | |
1604cfb0 | 3022 | goto no_table; |
3866ea3b FC |
3023 | } |
3024 | #ifdef PERL_DONT_CREATE_GVSV | |
3025 | else if (!sv) { | |
1604cfb0 | 3026 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
3866ea3b FC |
3027 | } |
3028 | #endif | |
79c9643d JL |
3029 | else if (SvTRUE(sv)) |
3030 | /* don't need to set overloading here because fallback => 1 | |
3031 | * is the default setting for classes without overloading */ | |
1604cfb0 | 3032 | amt.fallback=AMGfallYES; |
79c9643d | 3033 | else if (SvOK(sv)) { |
1604cfb0 | 3034 | amt.fallback=AMGfallNEVER; |
386a5489 | 3035 | filled = 1; |
386a5489 | 3036 | } |
79c9643d | 3037 | else { |
386a5489 | 3038 | filled = 1; |
386a5489 | 3039 | } |
a6006777 | 3040 | |
3d147ac2 | 3041 | assert(SvOOK(stash)); |
3d147ac2 | 3042 | /* initially assume the worst */ |
339441ef | 3043 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_NO_DEREF; |
3d147ac2 | 3044 | |
8c34e50d | 3045 | for (i = 1; i < NofAMmeth; i++) { |
1604cfb0 MS |
3046 | const char * const cooky = PL_AMG_names[i]; |
3047 | /* Human-readable form, for debugging: */ | |
3048 | const char * const cp = AMG_id2name(i); | |
3049 | const STRLEN l = PL_AMG_namelens[i]; | |
3050 | ||
3051 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", | |
3052 | cp, HvNAME_get(stash)) ); | |
3053 | /* don't fill the cache while looking up! | |
3054 | Creation of inheritance stubs in intermediate packages may | |
3055 | conflict with the logic of runtime method substitution. | |
3056 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
3057 | then we could have created stubs for "(+0" in A and C too. | |
3058 | But if B overloads "bool", we may want to use it for | |
3059 | numifying instead of C's "+0". */ | |
3060 | gv = Perl_gv_fetchmeth_pvn(aTHX_ stash, cooky, l, -1, 0); | |
46fc3d4c | 3061 | cv = 0; |
c3ad4e54 | 3062 | if (gv && (cv = GvCV(gv)) && CvHASGV(cv)) { |
79656330 | 3063 | const HEK * const gvhek = CvGvNAME_HEK(cv); |
c3ad4e54 FC |
3064 | const HEK * const stashek = |
3065 | HvNAME_HEK(CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv))); | |
b59bf0b2 KW |
3066 | if (memEQs(HEK_KEY(gvhek), HEK_LEN(gvhek), "nil") |
3067 | && stashek | |
3068 | && memEQs(HEK_KEY(stashek), HEK_LEN(stashek), "overload")) { | |
1604cfb0 MS |
3069 | /* This is a hack to support autoloading..., while |
3070 | knowing *which* methods were declared as overloaded. */ | |
3071 | /* GvSV contains the name of the method. */ | |
3072 | GV *ngv = NULL; | |
3073 | SV *gvsv = GvSV(gv); | |
3074 | ||
3075 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%" SVf256\ | |
3076 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
3077 | (void*)GvSV(gv), cp, HvNAME(stash)) ); | |
3078 | if (!gvsv || !SvPOK(gvsv) | |
3079 | || !(ngv = gv_fetchmethod_sv_flags(stash, gvsv, 0))) | |
3080 | { | |
3081 | /* Can be an import stub (created by "can"). */ | |
3082 | if (destructing) { | |
3083 | return -1; | |
3084 | } | |
3085 | else { | |
3086 | const SV * const name = (gvsv && SvPOK(gvsv)) | |
d66cca07 BF |
3087 | ? gvsv |
3088 | : newSVpvs_flags("???", SVs_TEMP); | |
1604cfb0 MS |
3089 | /* diag_listed_as: Can't resolve method "%s" overloading "%s" in package "%s" */ |
3090 | Perl_croak(aTHX_ "%s method \"%" SVf256 | |
3091 | "\" overloading \"%s\" "\ | |
3092 | "in package \"%" HEKf256 "\"", | |
3093 | (GvCVGEN(gv) ? "Stub found while resolving" | |
3094 | : "Can't resolve"), | |
3095 | SVfARG(name), cp, | |
d0c0e7dd | 3096 | HEKfARG( |
1604cfb0 MS |
3097 | HvNAME_HEK(stash) |
3098 | )); | |
3099 | } | |
3100 | } | |
3101 | cv = GvCV(gv = ngv); | |
3102 | } | |
3103 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", | |
3104 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), | |
3105 | GvNAME(CvGV(cv))) ); | |
3106 | filled = 1; | |
3107 | } else if (gv) { /* Autoloaded... */ | |
3108 | cv = MUTABLE_CV(gv); | |
3109 | filled = 1; | |
3110 | } | |
3111 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); | |
3d147ac2 DM |
3112 | |
3113 | if (gv) { | |
3114 | switch (i) { | |
3115 | case to_sv_amg: | |
3116 | case to_av_amg: | |
3117 | case to_hv_amg: | |
3118 | case to_gv_amg: | |
3119 | case to_cv_amg: | |
3120 | case nomethod_amg: | |
3121 | deref_seen = 1; | |
3122 | break; | |
3123 | } | |
3124 | } | |
a0d0e21e | 3125 | } |
3d147ac2 | 3126 | if (!deref_seen) |
45479970 DM |
3127 | /* none of @{} etc overloaded; we can do $obj->[N] quicker. |
3128 | * NB - aux var invalid here, HvARRAY() could have been | |
3129 | * reallocated since it was assigned to */ | |
3130 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_NO_DEREF; | |
3d147ac2 | 3131 | |
a0d0e21e | 3132 | if (filled) { |
a6006777 | 3133 | AMT_AMAGIC_on(&amt); |
ad64d0ec | 3134 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
1604cfb0 | 3135 | (char*)&amt, sizeof(AMT)); |
8c34e50d | 3136 | return TRUE; |
a0d0e21e LW |
3137 | } |
3138 | } | |
a6006777 | 3139 | /* Here we have no table: */ |
8c34e50d | 3140 | no_table: |
a6006777 | 3141 | AMT_AMAGIC_off(&amt); |
ad64d0ec | 3142 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
1604cfb0 | 3143 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 | 3144 | return 0; |
a0d0e21e LW |
3145 | } |
3146 | ||
32251b26 IZ |
3147 | |
3148 | CV* | |
3149 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
3150 | { | |
3f8f4626 | 3151 | MAGIC *mg; |
32251b26 | 3152 | AMT *amtp; |
e1a479c5 | 3153 | U32 newgen; |
9b439311 | 3154 | struct mro_meta* stash_meta; |
32251b26 | 3155 | |
bfcb3514 | 3156 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 3157 | return NULL; |
e1a479c5 | 3158 | |
9b439311 BB |
3159 | stash_meta = HvMROMETA(stash); |
3160 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 3161 | |
ad64d0ec | 3162 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
3163 | if (!mg) { |
3164 | do_update: | |
1604cfb0 MS |
3165 | if (Gv_AMupdate(stash, 0) == -1) |
3166 | return NULL; | |
3167 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); | |
32251b26 | 3168 | } |
a9fd4e40 | 3169 | assert(mg); |
32251b26 | 3170 | amtp = (AMT*)mg->mg_ptr; |
66978156 | 3171 | if ( amtp->was_ok_sub != newgen ) |
1604cfb0 | 3172 | goto do_update; |
3ad83ce7 | 3173 | if (AMT_AMAGIC(amtp)) { |
1604cfb0 MS |
3174 | CV * const ret = amtp->table[id]; |
3175 | if (ret && isGV(ret)) { /* Autoloading stab */ | |
3176 | /* Passing it through may have resulted in a warning | |
3177 | "Inherited AUTOLOAD for a non-method deprecated", since | |
3178 | our caller is going through a function call, not a method call. | |
3179 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
3180 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); | |
3181 | ||
3182 | if (gv && GvCV(gv)) | |
3183 | return GvCV(gv); | |
3184 | } | |
3185 | return ret; | |
3ad83ce7 | 3186 | } |
a0288114 | 3187 | |
601f1833 | 3188 | return NULL; |
32251b26 IZ |
3189 | } |
3190 | ||
3191 | ||
6f1401dc DM |
3192 | /* Implement tryAMAGICun_MG macro. |
3193 | Do get magic, then see if the stack arg is overloaded and if so call it. | |
3194 | Flags: | |
1604cfb0 | 3195 | AMGf_numeric apply sv_2num to the stack arg. |
6f1401dc DM |
3196 | */ |
3197 | ||
3198 | bool | |
3199 | Perl_try_amagic_un(pTHX_ int method, int flags) { | |
6f1401dc DM |
3200 | dSP; |
3201 | SV* tmpsv; | |
3202 | SV* const arg = TOPs; | |
3203 | ||
3204 | SvGETMAGIC(arg); | |
3205 | ||
9f8bf298 | 3206 | if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method, |
1604cfb0 MS |
3207 | AMGf_noright | AMGf_unary |
3208 | | (flags & AMGf_numarg)))) | |
636ac8fc | 3209 | { |
13874762 DM |
3210 | /* where the op is of the form: |
3211 | * $lex = $x op $y (where the assign is optimised away) | |
3212 | * then assign the returned value to targ and return that; | |
3213 | * otherwise return the value directly | |
3214 | */ | |
3215 | if ( (PL_opargs[PL_op->op_type] & OA_TARGLEX) | |
3216 | && (PL_op->op_private & OPpTARGET_MY)) | |
3217 | { | |
3218 | dTARGET; | |
3219 | sv_setsv(TARG, tmpsv); | |
3220 | SETTARG; | |
3221 | } | |
3222 | else | |
3223 | SETs(tmpsv); | |
3224 | ||
1604cfb0 MS |
3225 | PUTBACK; |
3226 | return TRUE; | |
6f1401dc DM |
3227 | } |
3228 | ||
3229 | if ((flags & AMGf_numeric) && SvROK(arg)) | |
1604cfb0 | 3230 | *sp = sv_2num(arg); |
6f1401dc DM |
3231 | return FALSE; |
3232 | } | |
3233 | ||
3234 | ||
3235 | /* Implement tryAMAGICbin_MG macro. | |
3236 | Do get magic, then see if the two stack args are overloaded and if so | |
3237 | call it. | |
3238 | Flags: | |
1604cfb0 MS |
3239 | AMGf_assign op may be called as mutator (eg +=) |
3240 | AMGf_numeric apply sv_2num to the stack arg. | |
6f1401dc DM |
3241 | */ |
3242 | ||
3243 | bool | |
3244 | Perl_try_amagic_bin(pTHX_ int method, int flags) { | |
6f1401dc DM |
3245 | dSP; |
3246 | SV* const left = TOPm1s; | |
3247 | SV* const right = TOPs; | |
3248 | ||
3249 | SvGETMAGIC(left); | |
3250 | if (left != right) | |
1604cfb0 | 3251 | SvGETMAGIC(right); |
6f1401dc DM |
3252 | |
3253 | if (SvAMAGIC(left) || SvAMAGIC(right)) { | |
1604cfb0 | 3254 | SV * tmpsv; |
72876cce DM |
3255 | /* STACKED implies mutator variant, e.g. $x += 1 */ |
3256 | bool mutator = (flags & AMGf_assign) && (PL_op->op_flags & OPf_STACKED); | |
3257 | ||
1604cfb0 MS |
3258 | tmpsv = amagic_call(left, right, method, |
3259 | (mutator ? AMGf_assign: 0) | |
3260 | | (flags & AMGf_numarg)); | |
3261 | if (tmpsv) { | |
13874762 DM |
3262 | (void)POPs; |
3263 | /* where the op is one of the two forms: | |
3264 | * $x op= $y | |
3265 | * $lex = $x op $y (where the assign is optimised away) | |
3266 | * then assign the returned value to targ and return that; | |
3267 | * otherwise return the value directly | |
3268 | */ | |
3269 | if ( mutator | |
3270 | || ( (PL_opargs[PL_op->op_type] & OA_TARGLEX) | |
3271 | && (PL_op->op_private & OPpTARGET_MY))) | |
3272 | { | |
3273 | dTARG; | |
3274 | TARG = mutator ? *SP : PAD_SV(PL_op->op_targ); | |
3275 | sv_setsv(TARG, tmpsv); | |
3276 | SETTARG; | |
3277 | } | |
3278 | else | |
3279 | SETs(tmpsv); | |
3280 | ||
1604cfb0 MS |
3281 | PUTBACK; |
3282 | return TRUE; | |
3283 | } | |
6f1401dc | 3284 | } |
13874762 | 3285 | |
75ea7a12 | 3286 | if(left==right && SvGMAGICAL(left)) { |
1604cfb0 MS |
3287 | SV * const left = sv_newmortal(); |
3288 | *(sp-1) = left; | |
3289 | /* Print the uninitialized warning now, so it includes the vari- | |
3290 | able name. */ | |
3291 | if (!SvOK(right)) { | |
3292 | if (ckWARN(WARN_UNINITIALIZED)) report_uninit(right); | |
1d0d673f | 3293 | sv_setbool(left, FALSE); |
1604cfb0 MS |
3294 | } |
3295 | else sv_setsv_flags(left, right, 0); | |
3296 | SvGETMAGIC(right); | |
75ea7a12 | 3297 | } |
6f1401dc | 3298 | if (flags & AMGf_numeric) { |
1604cfb0 MS |
3299 | if (SvROK(TOPm1s)) |
3300 | *(sp-1) = sv_2num(TOPm1s); | |
3301 | if (SvROK(right)) | |
3302 | *sp = sv_2num(right); | |
6f1401dc DM |
3303 | } |
3304 | return FALSE; | |
3305 | } | |
3306 | ||
25a9ffce NC |
3307 | SV * |
3308 | Perl_amagic_deref_call(pTHX_ SV *ref, int method) { | |
3309 | SV *tmpsv = NULL; | |
3d147ac2 | 3310 | HV *stash; |
25a9ffce NC |
3311 | |
3312 | PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL; | |
3313 | ||
3d147ac2 DM |
3314 | if (!SvAMAGIC(ref)) |
3315 | return ref; | |
3316 | /* return quickly if none of the deref ops are overloaded */ | |
3317 | stash = SvSTASH(SvRV(ref)); | |
3318 | assert(SvOOK(stash)); | |
3319 | if (HvAUX(stash)->xhv_aux_flags & HvAUXf_NO_DEREF) | |
3320 | return ref; | |
3321 | ||
3322 | while ((tmpsv = amagic_call(ref, &PL_sv_undef, method, | |
9c913148 | 3323 | AMGf_noright | AMGf_unary))) { |
1604cfb0 MS |
3324 | if (!SvROK(tmpsv)) |
3325 | Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); | |
3326 | if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) { | |
3327 | /* Bail out if it returns us the same reference. */ | |
3328 | return tmpsv; | |
3329 | } | |
3330 | ref = tmpsv; | |
3d147ac2 DM |
3331 | if (!SvAMAGIC(ref)) |
3332 | break; | |
25a9ffce NC |
3333 | } |
3334 | return tmpsv ? tmpsv : ref; | |
3335 | } | |
6f1401dc | 3336 | |
8d569291 FC |
3337 | bool |
3338 | Perl_amagic_is_enabled(pTHX_ int method) | |
3339 | { | |
3340 | SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0); | |
3341 | ||
3342 | assert(PL_curcop->cop_hints & HINT_NO_AMAGIC); | |
3343 | ||
3344 | if ( !lex_mask || !SvOK(lex_mask) ) | |
1604cfb0 MS |
3345 | /* overloading lexically disabled */ |
3346 | return FALSE; | |
8d569291 | 3347 | else if ( lex_mask && SvPOK(lex_mask) ) { |
1604cfb0 MS |
3348 | /* we have an entry in the hints hash, check if method has been |
3349 | * masked by overloading.pm */ | |
3350 | STRLEN len; | |
3351 | const int offset = method / 8; | |
3352 | const int bit = method % 8; | |
3353 | char *pv = SvPV(lex_mask, len); | |
3354 | ||
3355 | /* Bit set, so this overloading operator is disabled */ | |
3356 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) | |
3357 | return FALSE; | |
8d569291 FC |
3358 | } |
3359 | return TRUE; | |
3360 | } | |
3361 | ||
a0d0e21e | 3362 | SV* |
864dbfa3 | 3363 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 3364 | { |
b267980d | 3365 | MAGIC *mg; |
9c5ffd7c | 3366 | CV *cv=NULL; |
a0d0e21e | 3367 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 3368 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
3369 | int off = 0, off1, lr = 0, notfound = 0; |
3370 | int postpr = 0, force_cpy = 0; | |
3371 | int assign = AMGf_assign & flags; | |
3372 | const int assignshift = assign ? 1 : 0; | |
bf5522a1 | 3373 | int use_default_op = 0; |
67288365 | 3374 | int force_scalar = 0; |
497b47a8 JH |
3375 | #ifdef DEBUGGING |
3376 | int fl=0; | |
497b47a8 | 3377 | #endif |
25716404 | 3378 | HV* stash=NULL; |
7918f24d NC |
3379 | |
3380 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
3381 | ||
e46c382e | 3382 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
8d569291 | 3383 | if (!amagic_is_enabled(method)) return NULL; |
e46c382e YK |
3384 | } |
3385 | ||
a0d0e21e | 3386 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
0a2c84ab | 3387 | && (stash = SvSTASH(SvRV(left))) && Gv_AMG(stash) |
ad64d0ec | 3388 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 3389 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1604cfb0 MS |
3390 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
3391 | : NULL)) | |
b267980d | 3392 | && ((cv = cvp[off=method+assignshift]) |
1604cfb0 MS |
3393 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
3394 | * usual method */ | |
3395 | ( | |
497b47a8 | 3396 | #ifdef DEBUGGING |
1604cfb0 | 3397 | fl = 1, |
a0288114 | 3398 | #endif |
1604cfb0 | 3399 | cv = cvp[off=method])))) { |
a0d0e21e LW |
3400 | lr = -1; /* Call method for left argument */ |
3401 | } else { | |
3402 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
3403 | int logic; | |
3404 | ||
3405 | /* look for substituted methods */ | |
ee239bfe | 3406 | /* In all the covered cases we should be called with assign==0. */ |
1604cfb0 MS |
3407 | switch (method) { |
3408 | case inc_amg: | |
3409 | force_cpy = 1; | |
3410 | if ((cv = cvp[off=add_ass_amg]) | |
2eb3aaaa JK |
3411 | || ((cv = cvp[off = add_amg]) |
3412 | && (force_cpy = 0, (postpr = 1)))) { | |
1604cfb0 MS |
3413 | right = &PL_sv_yes; lr = -1; assign = 1; |
3414 | } | |
3415 | break; | |
3416 | case dec_amg: | |
3417 | force_cpy = 1; | |
3418 | if ((cv = cvp[off = subtr_ass_amg]) | |
2eb3aaaa JK |
3419 | || ((cv = cvp[off = subtr_amg]) |
3420 | && (force_cpy = 0, (postpr=1)))) { | |
1604cfb0 MS |
3421 | right = &PL_sv_yes; lr = -1; assign = 1; |
3422 | } | |
3423 | break; | |
3424 | case bool__amg: | |
3425 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
3426 | break; | |
3427 | case numer_amg: | |
3428 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
3429 | break; | |
3430 | case string_amg: | |
3431 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
3432 | break; | |
b7787f18 AL |
3433 | case not_amg: |
3434 | (void)((cv = cvp[off=bool__amg]) | |
3435 | || (cv = cvp[off=numer_amg]) | |
3436 | || (cv = cvp[off=string_amg])); | |
2ab54efd MB |
3437 | if (cv) |
3438 | postpr = 1; | |
b7787f18 | 3439 | break; |
1604cfb0 MS |
3440 | case copy_amg: |
3441 | { | |
3442 | /* | |
3443 | * SV* ref causes confusion with the interpreter variable of | |
3444 | * the same name | |
3445 | */ | |
3446 | SV* const tmpRef=SvRV(left); | |
3447 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { | |
3448 | /* | |
3449 | * Just to be extra cautious. Maybe in some | |
3450 | * additional cases sv_setsv is safe, too. | |
3451 | */ | |
3452 | SV* const newref = newSVsv(tmpRef); | |
3453 | SvOBJECT_on(newref); | |
3454 | /* No need to do SvAMAGIC_on here, as SvAMAGIC macros | |
3455 | delegate to the stash. */ | |
3456 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); | |
3457 | return newref; | |
3458 | } | |
3459 | } | |
3460 | break; | |
3461 | case abs_amg: | |
3462 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) | |
3463 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { | |
3464 | SV* const nullsv=&PL_sv_zero; | |
3465 | if (off1==lt_amg) { | |
3466 | SV* const lessp = amagic_call(left,nullsv, | |
3467 | lt_amg,AMGf_noright); | |
3468 | logic = SvTRUE_NN(lessp); | |
3469 | } else { | |
3470 | SV* const lessp = amagic_call(left,nullsv, | |
3471 | ncmp_amg,AMGf_noright); | |
3472 | logic = (SvNV(lessp) < 0); | |
3473 | } | |
3474 | if (logic) { | |
3475 | if (off==subtr_amg) { | |
3476 | right = left; | |
3477 | left = nullsv; | |
3478 | lr = 1; | |
3479 | } | |
3480 | } else { | |
3481 | return left; | |
3482 | } | |
3483 | } | |
3484 | break; | |
3485 | case neg_amg: | |
3486 | if ((cv = cvp[off=subtr_amg])) { | |
3487 | right = left; | |
3488 | left = &PL_sv_zero; | |
3489 | lr = 1; | |
3490 | } | |
3491 | break; | |
3492 | case int_amg: | |
3493 | case iter_amg: /* XXXX Eventually should do to_gv. */ | |
3494 | case ftest_amg: /* XXXX Eventually should do to_gv. */ | |
3495 | case regexp_amg: | |
3496 | /* FAIL safe */ | |
3497 | return NULL; /* Delegate operation to standard mechanisms. */ | |
3498 | ||
3499 | case to_sv_amg: | |
3500 | case to_av_amg: | |
3501 | case to_hv_amg: | |
3502 | case to_gv_amg: | |
3503 | case to_cv_amg: | |
3504 | /* FAIL safe */ | |
3505 | return left; /* Delegate operation to standard mechanisms. */ | |
3506 | ||
3507 | default: | |
3508 | goto not_found; | |
3509 | } | |
3510 | if (!cv) goto not_found; | |
a0d0e21e | 3511 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1604cfb0 MS |
3512 | && (stash = SvSTASH(SvRV(right))) && Gv_AMG(stash) |
3513 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) | |
3514 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) | |
3515 | ? (amtp = (AMT*)mg->mg_ptr)->table | |
3516 | : NULL)) | |
3517 | && (cv = cvp[off=method])) { /* Method for right | |
3518 | * argument found */ | |
69815d08 | 3519 | lr=1; |
bf5522a1 MB |
3520 | } else if (((cvp && amtp->fallback > AMGfallNEVER) |
3521 | || (ocvp && oamtp->fallback > AMGfallNEVER)) | |
1604cfb0 MS |
3522 | && !(flags & AMGf_unary)) { |
3523 | /* We look for substitution for | |
3524 | * comparison operations and | |
3525 | * concatenation */ | |
a0d0e21e | 3526 | if (method==concat_amg || method==concat_ass_amg |
1604cfb0 MS |
3527 | || method==repeat_amg || method==repeat_ass_amg) { |
3528 | return NULL; /* Delegate operation to string conversion */ | |
a0d0e21e LW |
3529 | } |
3530 | off = -1; | |
3531 | switch (method) { | |
1604cfb0 MS |
3532 | case lt_amg: |
3533 | case le_amg: | |
3534 | case gt_amg: | |
3535 | case ge_amg: | |
3536 | case eq_amg: | |
3537 | case ne_amg: | |
2ab54efd MB |
3538 | off = ncmp_amg; |
3539 | break; | |
1604cfb0 MS |
3540 | case slt_amg: |
3541 | case sle_amg: | |
3542 | case sgt_amg: | |
3543 | case sge_amg: | |
3544 | case seq_amg: | |
3545 | case sne_amg: | |
2ab54efd MB |
3546 | off = scmp_amg; |
3547 | break; | |
1604cfb0 | 3548 | } |
bf5522a1 MB |
3549 | if (off != -1) { |
3550 | if (ocvp && (oamtp->fallback > AMGfallNEVER)) { | |
3551 | cv = ocvp[off]; | |
3552 | lr = -1; | |
3553 | } | |
3554 | if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) { | |
3555 | cv = cvp[off]; | |
3556 | lr = 1; | |
3557 | } | |
3558 | } | |
3559 | if (cv) | |
2ab54efd MB |
3560 | postpr = 1; |
3561 | else | |
3562 | goto not_found; | |
a0d0e21e | 3563 | } else { |
a6006777 | 3564 | not_found: /* No method found, either report or croak */ |
b267980d | 3565 | switch (method) { |
1604cfb0 MS |
3566 | case to_sv_amg: |
3567 | case to_av_amg: | |
3568 | case to_hv_amg: | |
3569 | case to_gv_amg: | |
3570 | case to_cv_amg: | |
3571 | /* FAIL safe */ | |
3572 | return left; /* Delegate operation to standard mechanisms. */ | |
b267980d | 3573 | } |
a0d0e21e | 3574 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1604cfb0 | 3575 | notfound = 1; lr = -1; |
a0d0e21e | 3576 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1604cfb0 | 3577 | notfound = 1; lr = 1; |
bf5522a1 MB |
3578 | } else if ((use_default_op = |
3579 | (!ocvp || oamtp->fallback >= AMGfallYES) | |
3580 | && (!cvp || amtp->fallback >= AMGfallYES)) | |
3581 | && !DEBUG_o_TEST) { | |
1604cfb0 MS |
3582 | /* Skip generating the "no method found" message. */ |
3583 | return NULL; | |
a0d0e21e | 3584 | } else { |
1604cfb0 MS |
3585 | SV *msg; |
3586 | if (off==-1) off=method; | |
3587 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ | |
3588 | "Operation \"%s\": no method found,%sargument %s%" SVf "%s%" SVf, | |
3589 | AMG_id2name(method + assignshift), | |
3590 | (flags & AMGf_unary ? " " : "\n\tleft "), | |
3591 | SvAMAGIC(left)? | |
3592 | "in overloaded package ": | |
3593 | "has no overloaded magic", | |
3594 | SvAMAGIC(left)? | |
3595 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(left)))))): | |
3596 | SVfARG(&PL_sv_no), | |
3597 | SvAMAGIC(right)? | |
3598 | ",\n\tright argument in overloaded package ": | |
3599 | (flags & AMGf_unary | |
3600 | ? "" | |
3601 | : ",\n\tright argument has no overloaded magic"), | |
3602 | SvAMAGIC(right)? | |
3603 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(right)))))): | |
3604 | SVfARG(&PL_sv_no))); | |
bf5522a1 | 3605 | if (use_default_op) { |
1604cfb0 MS |
3606 | DEBUG_o( Perl_deb(aTHX_ "%" SVf, SVfARG(msg)) ); |
3607 | } else { | |
3608 | Perl_croak(aTHX_ "%" SVf, SVfARG(msg)); | |
3609 | } | |
3610 | return NULL; | |
a0d0e21e | 3611 | } |
ee239bfe | 3612 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
3613 | } |
3614 | } | |
67288365 JL |
3615 | |
3616 | switch (method) { | |
3617 | /* in these cases, we're calling '+' or '-' as a fallback for a ++ or -- | |
3618 | * operation. we need this to return a value, so that it can be assigned | |
3619 | * later on, in the postpr block (case inc_amg/dec_amg), even if the | |
3620 | * increment or decrement was itself called in void context */ | |
3621 | case inc_amg: | |
3622 | if (off == add_amg) | |
3623 | force_scalar = 1; | |
3624 | break; | |
3625 | case dec_amg: | |
3626 | if (off == subtr_amg) | |
3627 | force_scalar = 1; | |
3628 | break; | |
3629 | /* in these cases, we're calling an assignment variant of an operator | |
3630 | * (+= rather than +, for instance). regardless of whether it's a | |
3631 | * fallback or not, it always has to return a value, which will be | |
3632 | * assigned to the proper variable later */ | |
3633 | case add_amg: | |
3634 | case subtr_amg: | |
3635 | case mult_amg: | |
3636 | case div_amg: | |
3637 | case modulo_amg: | |
3638 | case pow_amg: | |
3639 | case lshift_amg: | |
3640 | case rshift_amg: | |
3641 | case repeat_amg: | |
3642 | case concat_amg: | |
3643 | case band_amg: | |
3644 | case bor_amg: | |
3645 | case bxor_amg: | |
6d06ecce FC |
3646 | case sband_amg: |
3647 | case sbor_amg: | |
3648 | case sbxor_amg: | |
67288365 JL |
3649 | if (assign) |
3650 | force_scalar = 1; | |
3651 | break; | |
3652 | /* the copy constructor always needs to return a value */ | |
3653 | case copy_amg: | |
3654 | force_scalar = 1; | |
3655 | break; | |
3656 | /* because of the way these are implemented (they don't perform the | |
3657 | * dereferencing themselves, they return a reference that perl then | |
3658 | * dereferences later), they always have to be in scalar context */ | |
3659 | case to_sv_amg: | |
3660 | case to_av_amg: | |
3661 | case to_hv_amg: | |
3662 | case to_gv_amg: | |
3663 | case to_cv_amg: | |
3664 | force_scalar = 1; | |
3665 | break; | |
3666 | /* these don't have an op of their own; they're triggered by their parent | |
3667 | * op, so the context there isn't meaningful ('$a and foo()' in void | |
3668 | * context still needs to pass scalar context on to $a's bool overload) */ | |
3669 | case bool__amg: | |
3670 | case numer_amg: | |
3671 | case string_amg: | |
3672 | force_scalar = 1; | |
3673 | break; | |
3674 | } | |
3675 | ||
497b47a8 | 3676 | #ifdef DEBUGGING |
a0d0e21e | 3677 | if (!notfound) { |
497b47a8 | 3678 | DEBUG_o(Perl_deb(aTHX_ |
1604cfb0 MS |
3679 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %" SVf "%s\n", |
3680 | AMG_id2name(off), | |
3681 | method+assignshift==off? "" : | |
3682 | " (initially \"", | |
3683 | method+assignshift==off? "" : | |
3684 | AMG_id2name(method+assignshift), | |
3685 | method+assignshift==off? "" : "\")", | |
3686 | flags & AMGf_unary? "" : | |
3687 | lr==1 ? " for right argument": " for left argument", | |
3688 | flags & AMGf_unary? " for argument" : "", | |
3689 | stash ? SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(stash)))) : SVfARG(newSVpvs_flags("null", SVs_TEMP)), | |
3690 | fl? ",\n\tassignment variant used": "") ); | |
ee239bfe | 3691 | } |
497b47a8 | 3692 | #endif |
748a9306 LW |
3693 | /* Since we use shallow copy during assignment, we need |
3694 | * to dublicate the contents, probably calling user-supplied | |
3695 | * version of copy operator | |
3696 | */ | |
ee239bfe IZ |
3697 | /* We need to copy in following cases: |
3698 | * a) Assignment form was called. | |
3699 | * assignshift==1, assign==T, method + 1 == off | |
3700 | * b) Increment or decrement, called directly. | |
3701 | * assignshift==0, assign==0, method + 0 == off | |
3702 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 3703 | * assignshift==0, assign==T, |
ee239bfe IZ |
3704 | * force_cpy == T |
3705 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 3706 | * assignshift==0, assign==0, |
ee239bfe IZ |
3707 | * force_cpy == T |
3708 | * e) Assignment form translated to nomethod. | |
3709 | * assignshift==1, assign==T, method + 1 != off | |
3710 | * force_cpy == T | |
3711 | */ | |
3712 | /* off is method, method+assignshift, or a result of opcode substitution. | |
3713 | * In the latter case assignshift==0, so only notfound case is important. | |
3714 | */ | |
73512201 | 3715 | if ( (lr == -1) && ( ( (method + assignshift == off) |
1604cfb0 | 3716 | && (assign || (method == inc_amg) || (method == dec_amg))) |
73512201 | 3717 | || force_cpy) ) |
6f1401dc | 3718 | { |
1b38c28e NC |
3719 | /* newSVsv does not behave as advertised, so we copy missing |
3720 | * information by hand */ | |
3721 | SV *tmpRef = SvRV(left); | |
3722 | SV *rv_copy; | |
31d632c3 | 3723 | if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) { |
1604cfb0 MS |
3724 | SvRV_set(left, rv_copy); |
3725 | SvSETMAGIC(left); | |
9c913148 | 3726 | SvREFCNT_dec_NN(tmpRef); |
1b38c28e | 3727 | } |
6f1401dc DM |
3728 | } |
3729 | ||
a0d0e21e LW |
3730 | { |
3731 | dSP; | |
3732 | BINOP myop; | |
3733 | SV* res; | |
b7787f18 | 3734 | const bool oldcatch = CATCH_GET; |
67288365 | 3735 | I32 oldmark, nret; |
e839e6ed DM |
3736 | /* for multiconcat, we may call overload several times, |
3737 | * with the context of individual concats being scalar, | |
3738 | * regardless of the overall context of the multiconcat op | |
3739 | */ | |
3740 | U8 gimme = (force_scalar || PL_op->op_type == OP_MULTICONCAT) | |
3741 | ? G_SCALAR : GIMME_V; | |
a0d0e21e | 3742 | |
54310121 | 3743 | CATCH_SET(TRUE); |
a0d0e21e LW |
3744 | Zero(&myop, 1, BINOP); |
3745 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 3746 | myop.op_next = NULL; |
67288365 JL |
3747 | myop.op_flags = OPf_STACKED; |
3748 | ||
3749 | switch (gimme) { | |
3750 | case G_VOID: | |
3751 | myop.op_flags |= OPf_WANT_VOID; | |
3752 | break; | |
eb7e169e | 3753 | case G_LIST: |
67288365 JL |
3754 | if (flags & AMGf_want_list) { |
3755 | myop.op_flags |= OPf_WANT_LIST; | |
3756 | break; | |
3757 | } | |
3758 | /* FALLTHROUGH */ | |
3759 | default: | |
3760 | myop.op_flags |= OPf_WANT_SCALAR; | |
3761 | break; | |
3762 | } | |
a0d0e21e | 3763 | |
e788e7d3 | 3764 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 3765 | ENTER; |
462e5cf6 | 3766 | SAVEOP(); |
533c011a | 3767 | PL_op = (OP *) &myop; |
3280af22 | 3768 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
1604cfb0 | 3769 | PL_op->op_private |= OPpENTERSUB_DB; |
897d3989 | 3770 | Perl_pp_pushmark(aTHX); |
a0d0e21e | 3771 | |
924508f0 | 3772 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
3773 | PUSHs(lr>0? right: left); |
3774 | PUSHs(lr>0? left: right); | |
3280af22 | 3775 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 3776 | if (notfound) { |
59cd0e26 | 3777 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
1604cfb0 | 3778 | AMG_id2namelen(method + assignshift), SVs_TEMP)); |
a0d0e21e | 3779 | } |
636ac8fc FC |
3780 | else if (flags & AMGf_numarg) |
3781 | PUSHs(&PL_sv_undef); | |
3782 | if (flags & AMGf_numarg) | |
3783 | PUSHs(&PL_sv_yes); | |
ad64d0ec | 3784 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e | 3785 | PUTBACK; |
67288365 | 3786 | oldmark = TOPMARK; |
a0d0e21e | 3787 | |
139d0ce6 | 3788 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 | 3789 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
3790 | LEAVE; |
3791 | SPAGAIN; | |
67288365 JL |
3792 | nret = SP - (PL_stack_base + oldmark); |
3793 | ||
3794 | switch (gimme) { | |
3795 | case G_VOID: | |
3796 | /* returning NULL has another meaning, and we check the context | |
3797 | * at the call site too, so this can be differentiated from the | |
3798 | * scalar case */ | |
3799 | res = &PL_sv_undef; | |
3800 | SP = PL_stack_base + oldmark; | |
3801 | break; | |
eb7e169e | 3802 | case G_LIST: |
67288365 JL |
3803 | if (flags & AMGf_want_list) { |
3804 | res = sv_2mortal((SV *)newAV()); | |
3805 | av_extend((AV *)res, nret); | |
3806 | while (nret--) | |
3807 | av_store((AV *)res, nret, POPs); | |
3808 | break; | |
3809 | } | |
3810 | /* FALLTHROUGH */ | |
67288365 JL |
3811 | default: |
3812 | res = POPs; | |
3813 | break; | |
3814 | } | |
a0d0e21e | 3815 | |
ebafeae7 | 3816 | PUTBACK; |
d3acc0f7 | 3817 | POPSTACK; |
54310121 | 3818 | CATCH_SET(oldcatch); |
a0d0e21e | 3819 | |
a0d0e21e | 3820 | if (postpr) { |
b7787f18 | 3821 | int ans; |
a0d0e21e LW |
3822 | switch (method) { |
3823 | case le_amg: | |
3824 | case sle_amg: | |
1604cfb0 | 3825 | ans=SvIV(res)<=0; break; |
a0d0e21e LW |
3826 | case lt_amg: |
3827 | case slt_amg: | |
1604cfb0 | 3828 | ans=SvIV(res)<0; break; |
a0d0e21e LW |
3829 | case ge_amg: |
3830 | case sge_amg: | |
1604cfb0 | 3831 | ans=SvIV(res)>=0; break; |
a0d0e21e LW |
3832 | case gt_amg: |
3833 | case sgt_amg: | |
1604cfb0 | 3834 | ans=SvIV(res)>0; break; |
a0d0e21e LW |
3835 | case eq_amg: |
3836 | case seq_amg: | |
1604cfb0 | 3837 | ans=SvIV(res)==0; break; |
a0d0e21e LW |
3838 | case ne_amg: |
3839 | case sne_amg: | |
1604cfb0 | 3840 | ans=SvIV(res)!=0; break; |
a0d0e21e LW |
3841 | case inc_amg: |
3842 | case dec_amg: | |
1604cfb0 | 3843 | SvSetSV(left,res); return left; |
dc437b57 | 3844 | case not_amg: |
1604cfb0 | 3845 | ans=!SvTRUE_NN(res); break; |
b7787f18 AL |
3846 | default: |
3847 | ans=0; break; | |
a0d0e21e | 3848 | } |
54310121 | 3849 | return boolSV(ans); |
748a9306 LW |
3850 | } else if (method==copy_amg) { |
3851 | if (!SvROK(res)) { | |
1604cfb0 | 3852 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
3853 | } |
3854 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
3855 | } else { |
3856 | return res; | |
3857 | } | |
3858 | } | |
3859 | } | |
c9d5ac95 | 3860 | |
f5c1e807 NC |
3861 | void |
3862 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
3863 | { | |
acda4c6a | 3864 | U32 hash; |
f5c1e807 | 3865 | |
7918f24d | 3866 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 | 3867 | |
acda4c6a | 3868 | if (len > I32_MAX) |
1604cfb0 | 3869 | Perl_croak(aTHX_ "panic: gv name too long (%" UVuf ")", (UV) len); |
acda4c6a | 3870 | |
ae8cc45f | 3871 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
1604cfb0 | 3872 | unshare_hek(GvNAME_HEK(gv)); |
ae8cc45f NC |
3873 | } |
3874 | ||
acda4c6a | 3875 | PERL_HASH(hash, name, len); |
c60dbbc3 | 3876 | GvNAME_HEK(gv) = share_hek(name, (flags & SVf_UTF8 ? -(I32)len : (I32)len), hash); |
f5c1e807 NC |
3877 | } |
3878 | ||
66610fdd | 3879 | /* |
f7461760 Z |
3880 | =for apidoc gv_try_downgrade |
3881 | ||
2867cdbc Z |
3882 | If the typeglob C<gv> can be expressed more succinctly, by having |
3883 | something other than a real GV in its place in the stash, replace it | |
3884 | with the optimised form. Basic requirements for this are that C<gv> | |
3885 | is a real typeglob, is sufficiently ordinary, and is only referenced | |
3886 | from its package. This function is meant to be used when a GV has been | |
3887 | looked up in part to see what was there, causing upgrading, but based | |
3888 | on what was found it turns out that the real GV isn't required after all. | |
3889 | ||
3890 | If C<gv> is a completely empty typeglob, it is deleted from the stash. | |
3891 | ||
3892 | If C<gv> is a typeglob containing only a sufficiently-ordinary constant | |
3893 | sub, the typeglob is replaced with a scalar-reference placeholder that | |
3894 | more compactly represents the same thing. | |
f7461760 Z |
3895 | |
3896 | =cut | |
3897 | */ | |
3898 | ||
3899 | void | |
3900 | Perl_gv_try_downgrade(pTHX_ GV *gv) | |
3901 | { | |
3902 | HV *stash; | |
3903 | CV *cv; | |
3904 | HEK *namehek; | |
3905 | SV **gvp; | |
3906 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; | |
95f56751 FC |
3907 | |
3908 | /* XXX Why and where does this leave dangling pointers during global | |
3909 | destruction? */ | |
627364f1 | 3910 | if (PL_phase == PERL_PHASE_DESTRUCT) return; |
95f56751 | 3911 | |
2867cdbc | 3912 | if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
1604cfb0 MS |
3913 | !SvOBJECT(gv) && !SvREADONLY(gv) && |
3914 | isGV_with_GP(gv) && GvGP(gv) && | |
3915 | !GvINTRO(gv) && GvREFCNT(gv) == 1 && | |
3916 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && | |
3917 | GvEGVx(gv) == gv && (stash = GvSTASH(gv)))) | |
3918 | return; | |
2be08ad1 | 3919 | if (gv == PL_statgv || gv == PL_last_in_gv || gv == PL_stderrgv) |
1604cfb0 | 3920 | return; |
803f2748 DM |
3921 | if (SvMAGICAL(gv)) { |
3922 | MAGIC *mg; | |
1604cfb0 MS |
3923 | /* only backref magic is allowed */ |
3924 | if (SvGMAGICAL(gv) || SvSMAGICAL(gv)) | |
3925 | return; | |
803f2748 DM |
3926 | for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) { |
3927 | if (mg->mg_type != PERL_MAGIC_backref) | |
3928 | return; | |
1604cfb0 | 3929 | } |
803f2748 | 3930 | } |
2867cdbc Z |
3931 | cv = GvCV(gv); |
3932 | if (!cv) { | |
1604cfb0 MS |
3933 | HEK *gvnhek = GvNAME_HEK(gv); |
3934 | (void)hv_deletehek(stash, gvnhek, G_DISCARD); | |
8941bf97 | 3935 | } else if (GvMULTI(gv) && cv && SvREFCNT(cv) == 1 && |
1604cfb0 MS |
3936 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
3937 | CvSTASH(cv) == stash && !CvNAMED(cv) && CvGV(cv) == gv && | |
3938 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && | |
3939 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && | |
3940 | (namehek = GvNAME_HEK(gv)) && | |
3941 | (gvp = hv_fetchhek(stash, namehek, 0)) && | |
3942 | *gvp == (SV*)gv) { | |
3943 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); | |
3944 | const bool imported = !!GvIMPORTED_CV(gv); | |
3945 | SvREFCNT(gv) = 0; | |
3946 | sv_clear((SV*)gv); | |
3947 | SvREFCNT(gv) = 1; | |
3948 | SvFLAGS(gv) = SVt_IV|SVf_ROK|SVprv_PCS_IMPORTED * imported; | |
dc6369ef EH |
3949 | |
3950 | /* See also: 'SET_SVANY_FOR_BODYLESS_IV' in sv.c */ | |
1604cfb0 MS |
3951 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - |
3952 | STRUCT_OFFSET(XPVIV, xiv_iv)); | |
3953 | SvRV_set(gv, value); | |
f7461760 Z |
3954 | } |
3955 | } | |
3956 | ||
9e3fb20c FC |
3957 | GV * |
3958 | Perl_gv_override(pTHX_ const char * const name, const STRLEN len) | |
3959 | { | |
3960 | GV *gv = gv_fetchpvn(name, len, GV_NOTQUAL, SVt_PVCV); | |
3961 | GV * const *gvp; | |
3962 | PERL_ARGS_ASSERT_GV_OVERRIDE; | |
3963 | if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) return gv; | |
3964 | gvp = (GV**)hv_fetch(PL_globalstash, name, len, FALSE); | |
3965 | gv = gvp ? *gvp : NULL; | |
3966 | if (gv && !isGV(gv)) { | |
1604cfb0 MS |
3967 | if (!SvPCS_IMPORTED(gv)) return NULL; |
3968 | gv_init(gv, PL_globalstash, name, len, 0); | |
3969 | return gv; | |
9e3fb20c FC |
3970 | } |
3971 | return gv && GvCVu(gv) && GvIMPORTED_CV(gv) ? gv : NULL; | |
3972 | } | |
3973 | ||
4aaa4757 FC |
3974 | #include "XSUB.h" |
3975 | ||
3976 | static void | |
3977 | core_xsub(pTHX_ CV* cv) | |
3978 | { | |
3979 | Perl_croak(aTHX_ | |
3980 | "&CORE::%s cannot be called directly", GvNAME(CvGV(cv)) | |
3981 | ); | |
3982 | } | |
3983 | ||
f7461760 | 3984 | /* |
14d04a33 | 3985 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3986 | */ |