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 JH |
22 | /* |
23 | =head1 GV Functions | |
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 | ||
31 | =cut | |
ccfc67b7 JH |
32 | */ |
33 | ||
79072805 | 34 | #include "EXTERN.h" |
864dbfa3 | 35 | #define PERL_IN_GV_C |
79072805 | 36 | #include "perl.h" |
6ffcffbd | 37 | #include "overload.inc" |
4aaa4757 | 38 | #include "keywords.h" |
2846acbf | 39 | #include "feature.h" |
79072805 | 40 | |
f54cb97a | 41 | static const char S_autoload[] = "AUTOLOAD"; |
3c81f0b3 | 42 | #define S_autolen (sizeof("AUTOLOAD")-1) |
5c7983e5 | 43 | |
13c59d41 MH |
44 | GV * |
45 | Perl_gv_add_by_type(pTHX_ GV *gv, svtype type) | |
c69033f2 | 46 | { |
d5713896 | 47 | SV **where; |
7918f24d | 48 | |
13c59d41 MH |
49 | if ( |
50 | !gv | |
51 | || ( | |
52 | SvTYPE((const SV *)gv) != SVt_PVGV | |
13be902c | 53 | && SvTYPE((const SV *)gv) != SVt_PVLV |
13c59d41 | 54 | ) |
13be902c | 55 | ) { |
bb85b28a | 56 | const char *what; |
13c59d41 | 57 | if (type == SVt_PVIO) { |
bb85b28a NC |
58 | /* |
59 | * if it walks like a dirhandle, then let's assume that | |
60 | * this is a dirhandle. | |
61 | */ | |
332c2eac | 62 | what = OP_IS_DIRHOP(PL_op->op_type) ? |
bb85b28a | 63 | "dirhandle" : "filehandle"; |
13c59d41 | 64 | } else if (type == SVt_PVHV) { |
bb85b28a NC |
65 | what = "hash"; |
66 | } else { | |
13c59d41 | 67 | what = type == SVt_PVAV ? "array" : "scalar"; |
bb85b28a | 68 | } |
de6f7947 | 69 | /* diag_listed_as: Bad symbol for filehandle */ |
bb85b28a NC |
70 | Perl_croak(aTHX_ "Bad symbol for %s", what); |
71 | } | |
d5713896 | 72 | |
13c59d41 MH |
73 | if (type == SVt_PVHV) { |
74 | where = (SV **)&GvHV(gv); | |
75 | } else if (type == SVt_PVAV) { | |
76 | where = (SV **)&GvAV(gv); | |
77 | } else if (type == SVt_PVIO) { | |
78 | where = (SV **)&GvIOp(gv); | |
79 | } else { | |
80 | where = &GvSV(gv); | |
81 | } | |
7918f24d | 82 | |
13c59d41 MH |
83 | if (!*where) |
84 | { | |
85 | *where = newSV_type(type); | |
86 | if (type == SVt_PVAV && GvNAMELEN(gv) == 3 | |
87 | && strnEQ(GvNAME(gv), "ISA", 3)) | |
88 | sv_magic(*where, (SV *)gv, PERL_MAGIC_isa, NULL, 0); | |
e17aed30 | 89 | } |
13c59d41 | 90 | return gv; |
79072805 LW |
91 | } |
92 | ||
93 | GV * | |
864dbfa3 | 94 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 95 | { |
7918f24d | 96 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec NC |
97 | return gv_fetchfile_flags(name, strlen(name), 0); |
98 | } | |
99 | ||
100 | GV * | |
101 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
102 | const U32 flags) | |
103 | { | |
4116122e | 104 | char smallbuf[128]; |
53d95988 | 105 | char *tmpbuf; |
d9095cec | 106 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
107 | GV *gv; |
108 | ||
7918f24d | 109 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec NC |
110 | PERL_UNUSED_ARG(flags); |
111 | ||
1d7c1841 | 112 | if (!PL_defstash) |
a0714e2c | 113 | return NULL; |
1d7c1841 | 114 | |
d9095cec | 115 | if (tmplen <= sizeof smallbuf) |
53d95988 CS |
116 | tmpbuf = smallbuf; |
117 | else | |
798b63bc | 118 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 119 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
120 | tmpbuf[0] = '_'; |
121 | tmpbuf[1] = '<'; | |
d9095cec NC |
122 | memcpy(tmpbuf + 2, name, namelen); |
123 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); | |
1d7c1841 | 124 | if (!isGV(gv)) { |
d9095cec | 125 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 | 126 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec | 127 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 128 | #else |
d9095cec | 129 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 130 | #endif |
1d7c1841 | 131 | } |
c7a622b3 | 132 | if (PERLDB_LINE_OR_SAVESRC && !GvAV(gv)) |
43e4250a | 133 | hv_magic(GvHVn(gv), GvAVn(gv), PERL_MAGIC_dbfile); |
53d95988 CS |
134 | if (tmpbuf != smallbuf) |
135 | Safefree(tmpbuf); | |
79072805 LW |
136 | return gv; |
137 | } | |
138 | ||
62d55b22 NC |
139 | /* |
140 | =for apidoc gv_const_sv | |
141 | ||
142 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
143 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
144 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
796b6530 | 145 | C<NULL>. |
62d55b22 NC |
146 | |
147 | =cut | |
148 | */ | |
149 | ||
150 | SV * | |
151 | Perl_gv_const_sv(pTHX_ GV *gv) | |
152 | { | |
7918f24d | 153 | PERL_ARGS_ASSERT_GV_CONST_SV; |
23491f1d | 154 | PERL_UNUSED_CONTEXT; |
7918f24d | 155 | |
62d55b22 NC |
156 | if (SvTYPE(gv) == SVt_PVGV) |
157 | return cv_const_sv(GvCVu(gv)); | |
16a6e5a4 | 158 | return SvROK(gv) && SvTYPE(SvRV(gv)) != SVt_PVAV && SvTYPE(SvRV(gv)) != SVt_PVCV ? SvRV(gv) : NULL; |
62d55b22 NC |
159 | } |
160 | ||
12816592 NC |
161 | GP * |
162 | Perl_newGP(pTHX_ GV *const gv) | |
163 | { | |
164 | GP *gp; | |
19bad673 | 165 | U32 hash; |
19bad673 NC |
166 | const char *file; |
167 | STRLEN len; | |
2639089b | 168 | #ifndef USE_ITHREADS |
6b352265 | 169 | GV *filegv; |
2639089b | 170 | #endif |
c2587955 | 171 | dVAR; |
19bad673 | 172 | |
7918f24d | 173 | PERL_ARGS_ASSERT_NEWGP; |
2639089b DD |
174 | Newxz(gp, 1, GP); |
175 | gp->gp_egv = gv; /* allow compiler to reuse gv after this */ | |
176 | #ifndef PERL_DONT_CREATE_GVSV | |
177 | gp->gp_sv = newSV(0); | |
178 | #endif | |
7918f24d | 179 | |
c947bc1d FC |
180 | /* PL_curcop may be null here. E.g., |
181 | INIT { bless {} and exit } | |
182 | frees INIT before looking up DESTROY (and creating *DESTROY) | |
183 | */ | |
2639089b DD |
184 | if (PL_curcop) { |
185 | gp->gp_line = CopLINE(PL_curcop); /* 0 otherwise Newxz */ | |
6e314d4f | 186 | #ifdef USE_ITHREADS |
2639089b DD |
187 | if (CopFILE(PL_curcop)) { |
188 | file = CopFILE(PL_curcop); | |
189 | len = strlen(file); | |
190 | } | |
2639089b | 191 | #else |
cb0d3385 FC |
192 | filegv = CopFILEGV(PL_curcop); |
193 | if (filegv) { | |
194 | file = GvNAME(filegv)+2; | |
195 | len = GvNAMELEN(filegv)-2; | |
196 | } | |
6e314d4f | 197 | #endif |
cb0d3385 FC |
198 | else goto no_file; |
199 | } | |
200 | else { | |
201 | no_file: | |
19bad673 NC |
202 | file = ""; |
203 | len = 0; | |
204 | } | |
f4890806 NC |
205 | |
206 | PERL_HASH(hash, file, len); | |
f4890806 | 207 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
208 | gp->gp_refcnt = 1; |
209 | ||
210 | return gp; | |
211 | } | |
212 | ||
803f2748 DM |
213 | /* Assign CvGV(cv) = gv, handling weak references. |
214 | * See also S_anonymise_cv_maybe */ | |
215 | ||
216 | void | |
217 | Perl_cvgv_set(pTHX_ CV* cv, GV* gv) | |
218 | { | |
ae77754a | 219 | GV * const oldgv = CvNAMED(cv) ? NULL : SvANY(cv)->xcv_gv_u.xcv_gv; |
b290562e | 220 | HEK *hek; |
803f2748 DM |
221 | PERL_ARGS_ASSERT_CVGV_SET; |
222 | ||
223 | if (oldgv == gv) | |
224 | return; | |
225 | ||
226 | if (oldgv) { | |
cfc1e951 | 227 | if (CvCVGV_RC(cv)) { |
e7881358 | 228 | SvREFCNT_dec_NN(oldgv); |
cfc1e951 DM |
229 | CvCVGV_RC_off(cv); |
230 | } | |
803f2748 | 231 | else { |
803f2748 DM |
232 | sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv)); |
233 | } | |
234 | } | |
db5cc3ee FC |
235 | else if ((hek = CvNAME_HEK(cv))) { |
236 | unshare_hek(hek); | |
f3feca7a | 237 | CvLEXICAL_off(cv); |
db5cc3ee | 238 | } |
803f2748 | 239 | |
5988f306 | 240 | CvNAMED_off(cv); |
b290562e | 241 | SvANY(cv)->xcv_gv_u.xcv_gv = gv; |
c794ca97 | 242 | assert(!CvCVGV_RC(cv)); |
803f2748 DM |
243 | |
244 | if (!gv) | |
245 | return; | |
246 | ||
c794ca97 DM |
247 | if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv)) |
248 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv)); | |
249 | else { | |
cfc1e951 | 250 | CvCVGV_RC_on(cv); |
803f2748 DM |
251 | SvREFCNT_inc_simple_void_NN(gv); |
252 | } | |
803f2748 DM |
253 | } |
254 | ||
ae77754a FC |
255 | /* Convert CvSTASH + CvNAME_HEK into a GV. Conceptually, all subs have a |
256 | GV, but for efficiency that GV may not in fact exist. This function, | |
257 | called by CvGV, reifies it. */ | |
258 | ||
259 | GV * | |
260 | Perl_cvgv_from_hek(pTHX_ CV *cv) | |
261 | { | |
262 | GV *gv; | |
2eaf799e | 263 | SV **svp; |
ae77754a FC |
264 | PERL_ARGS_ASSERT_CVGV_FROM_HEK; |
265 | assert(SvTYPE(cv) == SVt_PVCV); | |
266 | if (!CvSTASH(cv)) return NULL; | |
267 | ASSUME(CvNAME_HEK(cv)); | |
2eaf799e FC |
268 | svp = hv_fetchhek(CvSTASH(cv), CvNAME_HEK(cv), 0); |
269 | gv = MUTABLE_GV(svp && *svp ? *svp : newSV(0)); | |
270 | if (!isGV(gv)) | |
271 | gv_init_pvn(gv, CvSTASH(cv), HEK_KEY(CvNAME_HEK(cv)), | |
ae77754a FC |
272 | HEK_LEN(CvNAME_HEK(cv)), |
273 | SVf_UTF8 * !!HEK_UTF8(CvNAME_HEK(cv))); | |
2eaf799e FC |
274 | if (!CvNAMED(cv)) { /* gv_init took care of it */ |
275 | assert (SvANY(cv)->xcv_gv_u.xcv_gv == gv); | |
276 | return gv; | |
277 | } | |
ae77754a FC |
278 | unshare_hek(CvNAME_HEK(cv)); |
279 | CvNAMED_off(cv); | |
280 | SvANY(cv)->xcv_gv_u.xcv_gv = gv; | |
2eaf799e | 281 | if (svp && *svp) SvREFCNT_inc_simple_void_NN(gv); |
ae77754a FC |
282 | CvCVGV_RC_on(cv); |
283 | return gv; | |
284 | } | |
285 | ||
c68d9564 Z |
286 | /* Assign CvSTASH(cv) = st, handling weak references. */ |
287 | ||
288 | void | |
289 | Perl_cvstash_set(pTHX_ CV *cv, HV *st) | |
290 | { | |
291 | HV *oldst = CvSTASH(cv); | |
292 | PERL_ARGS_ASSERT_CVSTASH_SET; | |
293 | if (oldst == st) | |
294 | return; | |
295 | if (oldst) | |
296 | sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv)); | |
297 | SvANY(cv)->xcv_stash = st; | |
298 | if (st) | |
299 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv)); | |
300 | } | |
803f2748 | 301 | |
e1104062 FC |
302 | /* |
303 | =for apidoc gv_init_pvn | |
304 | ||
305 | Converts a scalar into a typeglob. This is an incoercible typeglob; | |
306 | assigning a reference to it will assign to one of its slots, instead of | |
796b6530 KW |
307 | overwriting it as happens with typeglobs created by C<SvSetSV>. Converting |
308 | any scalar that is C<SvOK()> may produce unpredictable results and is reserved | |
e1104062 FC |
309 | for perl's internal use. |
310 | ||
311 | C<gv> is the scalar to be converted. | |
312 | ||
313 | C<stash> is the parent stash/package, if any. | |
314 | ||
04ec7e59 FC |
315 | C<name> and C<len> give the name. The name must be unqualified; |
316 | that is, it must not include the package name. If C<gv> is a | |
e1104062 FC |
317 | stash element, it is the caller's responsibility to ensure that the name |
318 | passed to this function matches the name of the element. If it does not | |
319 | match, perl's internal bookkeeping will get out of sync. | |
320 | ||
4a4088c4 | 321 | C<flags> can be set to C<SVf_UTF8> if C<name> is a UTF-8 string, or |
04ec7e59 | 322 | the return value of SvUTF8(sv). It can also take the |
796b6530 | 323 | C<GV_ADDMULTI> flag, which means to pretend that the GV has been |
e1104062 FC |
324 | seen before (i.e., suppress "Used once" warnings). |
325 | ||
326 | =for apidoc gv_init | |
327 | ||
4a4088c4 | 328 | The old form of C<gv_init_pvn()>. It does not work with UTF-8 strings, as it |
04ec7e59 | 329 | has no flags parameter. If the C<multi> parameter is set, the |
796b6530 | 330 | C<GV_ADDMULTI> flag will be passed to C<gv_init_pvn()>. |
e1104062 FC |
331 | |
332 | =for apidoc gv_init_pv | |
333 | ||
796b6530 | 334 | Same as C<gv_init_pvn()>, but takes a nul-terminated string for the name |
e1104062 FC |
335 | instead of separate char * and length parameters. |
336 | ||
337 | =for apidoc gv_init_sv | |
338 | ||
796b6530 | 339 | Same as C<gv_init_pvn()>, but takes an SV * for the name instead of separate |
e1104062 FC |
340 | char * and length parameters. C<flags> is currently unused. |
341 | ||
342 | =cut | |
343 | */ | |
344 | ||
463ee0b2 | 345 | void |
04ec7e59 | 346 | Perl_gv_init_sv(pTHX_ GV *gv, HV *stash, SV* namesv, U32 flags) |
e6066781 BF |
347 | { |
348 | char *namepv; | |
349 | STRLEN namelen; | |
350 | PERL_ARGS_ASSERT_GV_INIT_SV; | |
351 | namepv = SvPV(namesv, namelen); | |
352 | if (SvUTF8(namesv)) | |
353 | flags |= SVf_UTF8; | |
04ec7e59 | 354 | gv_init_pvn(gv, stash, namepv, namelen, flags); |
e6066781 BF |
355 | } |
356 | ||
357 | void | |
04ec7e59 | 358 | Perl_gv_init_pv(pTHX_ GV *gv, HV *stash, const char *name, U32 flags) |
e6066781 BF |
359 | { |
360 | PERL_ARGS_ASSERT_GV_INIT_PV; | |
04ec7e59 | 361 | gv_init_pvn(gv, stash, name, strlen(name), flags); |
e6066781 BF |
362 | } |
363 | ||
364 | void | |
04ec7e59 | 365 | Perl_gv_init_pvn(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, U32 flags) |
463ee0b2 | 366 | { |
3b6733bf NC |
367 | const U32 old_type = SvTYPE(gv); |
368 | const bool doproto = old_type > SVt_NULL; | |
f9509170 | 369 | char * const proto = (doproto && SvPOK(gv)) |
dad95a0a | 370 | ? ((void)(SvIsCOW(gv) && (sv_force_normal((SV *)gv), 0)), SvPVX(gv)) |
f9509170 | 371 | : NULL; |
49a54bbe | 372 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
e0260a5b | 373 | const U32 proto_utf8 = proto ? SvUTF8(gv) : 0; |
756cb477 | 374 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 375 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 | 376 | |
e6066781 | 377 | PERL_ARGS_ASSERT_GV_INIT_PVN; |
756cb477 NC |
378 | assert (!(proto && has_constant)); |
379 | ||
380 | if (has_constant) { | |
2eaf799e | 381 | /* The constant has to be a scalar, array or subroutine. */ |
5c1f4d79 | 382 | switch (SvTYPE(has_constant)) { |
5c1f4d79 | 383 | case SVt_PVHV: |
5c1f4d79 NC |
384 | case SVt_PVFM: |
385 | case SVt_PVIO: | |
386 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
387 | sv_reftype(has_constant, 0)); | |
81d52ecd | 388 | |
42d0e0b7 | 389 | default: NOOP; |
5c1f4d79 | 390 | } |
756cb477 NC |
391 | SvRV_set(gv, NULL); |
392 | SvROK_off(gv); | |
393 | } | |
463ee0b2 | 394 | |
3b6733bf NC |
395 | |
396 | if (old_type < SVt_PVGV) { | |
397 | if (old_type >= SVt_PV) | |
398 | SvCUR_set(gv, 0); | |
ad64d0ec | 399 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); |
3b6733bf | 400 | } |
55d729e4 GS |
401 | if (SvLEN(gv)) { |
402 | if (proto) { | |
f880fe2f | 403 | SvPV_set(gv, NULL); |
b162af07 | 404 | SvLEN_set(gv, 0); |
55d729e4 GS |
405 | SvPOK_off(gv); |
406 | } else | |
94010e71 | 407 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 408 | } |
2e5b91de NC |
409 | SvIOK_off(gv); |
410 | isGV_with_GP_on(gv); | |
12816592 | 411 | |
c43ae56f | 412 | GvGP_set(gv, Perl_newGP(aTHX_ gv)); |
e15faf7d NC |
413 | GvSTASH(gv) = stash; |
414 | if (stash) | |
ad64d0ec | 415 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
04f3bf56 | 416 | gv_name_set(gv, name, len, GV_ADD | ( flags & SVf_UTF8 ? SVf_UTF8 : 0 )); |
04ec7e59 FC |
417 | if (flags & GV_ADDMULTI || doproto) /* doproto means it */ |
418 | GvMULTI_on(gv); /* _was_ mentioned */ | |
2eaf799e FC |
419 | if (has_constant && SvTYPE(has_constant) == SVt_PVCV) { |
420 | /* Not actually a constant. Just a regular sub. */ | |
421 | CV * const cv = (CV *)has_constant; | |
422 | GvCV_set(gv,cv); | |
423 | if (CvSTASH(cv) == stash && ( | |
424 | CvNAME_HEK(cv) == GvNAME_HEK(gv) | |
425 | || ( HEK_LEN(CvNAME_HEK(cv)) == HEK_LEN(GvNAME_HEK(gv)) | |
426 | && HEK_FLAGS(CvNAME_HEK(cv)) != HEK_FLAGS(GvNAME_HEK(gv)) | |
427 | && HEK_UTF8(CvNAME_HEK(cv)) == HEK_UTF8(GvNAME_HEK(gv)) | |
428 | && memEQ(HEK_KEY(CvNAME_HEK(cv)), GvNAME(gv), GvNAMELEN(gv)) | |
429 | ) | |
430 | )) | |
431 | CvGV_set(cv,gv); | |
432 | } | |
433 | else if (doproto) { | |
e3d2b9e7 | 434 | CV *cv; |
756cb477 NC |
435 | if (has_constant) { |
436 | /* newCONSTSUB takes ownership of the reference from us. */ | |
e38acfd7 | 437 | cv = newCONSTSUB_flags(stash, name, len, flags, has_constant); |
75bd28cf FC |
438 | /* In case op.c:S_process_special_blocks stole it: */ |
439 | if (!GvCV(gv)) | |
c43ae56f | 440 | GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv)); |
439cdf38 | 441 | assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */ |
1ccdb730 NC |
442 | /* If this reference was a copy of another, then the subroutine |
443 | must have been "imported", by a Perl space assignment to a GV | |
444 | from a reference to CV. */ | |
445 | if (exported_constant) | |
446 | GvIMPORTED_CV_on(gv); | |
186a5ba8 | 447 | CvSTASH_set(cv, PL_curstash); /* XXX Why is this needed? */ |
756cb477 | 448 | } else { |
186a5ba8 | 449 | cv = newSTUB(gv,1); |
756cb477 | 450 | } |
55d729e4 | 451 | if (proto) { |
e3d2b9e7 | 452 | sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen, |
49a54bbe | 453 | SV_HAS_TRAILING_NUL); |
e0260a5b | 454 | if ( proto_utf8 ) SvUTF8_on(MUTABLE_SV(cv)); |
55d729e4 GS |
455 | } |
456 | } | |
463ee0b2 LW |
457 | } |
458 | ||
76e3520e | 459 | STATIC void |
e6066781 | 460 | S_gv_init_svtype(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 461 | { |
13c59d41 MH |
462 | PERL_ARGS_ASSERT_GV_INIT_SVTYPE; |
463 | ||
464 | switch (sv_type) { | |
465 | case SVt_PVIO: | |
466 | (void)GvIOn(gv); | |
467 | break; | |
468 | case SVt_PVAV: | |
469 | (void)GvAVn(gv); | |
470 | break; | |
471 | case SVt_PVHV: | |
472 | (void)GvHVn(gv); | |
473 | break; | |
c69033f2 | 474 | #ifdef PERL_DONT_CREATE_GVSV |
13c59d41 MH |
475 | case SVt_NULL: |
476 | case SVt_PVCV: | |
477 | case SVt_PVFM: | |
478 | case SVt_PVGV: | |
479 | break; | |
480 | default: | |
481 | if(GvSVn(gv)) { | |
482 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
483 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
484 | its side effect */ | |
485 | } | |
c69033f2 | 486 | #endif |
a0d0e21e LW |
487 | } |
488 | } | |
489 | ||
0f8d4b5e FC |
490 | static void core_xsub(pTHX_ CV* cv); |
491 | ||
492 | static GV * | |
493 | S_maybe_add_coresub(pTHX_ HV * const stash, GV *gv, | |
87566176 | 494 | const char * const name, const STRLEN len) |
0f8d4b5e FC |
495 | { |
496 | const int code = keyword(name, len, 1); | |
497 | static const char file[] = __FILE__; | |
97021f77 | 498 | CV *cv, *oldcompcv = NULL; |
0f8d4b5e | 499 | int opnum = 0; |
0f8d4b5e | 500 | bool ampable = TRUE; /* &{}-able */ |
97021f77 FC |
501 | COP *oldcurcop = NULL; |
502 | yy_parser *oldparser = NULL; | |
503 | I32 oldsavestack_ix = 0; | |
0f8d4b5e FC |
504 | |
505 | assert(gv || stash); | |
506 | assert(name); | |
0f8d4b5e | 507 | |
88b892d8 FC |
508 | if (!code) return NULL; /* Not a keyword */ |
509 | switch (code < 0 ? -code : code) { | |
0f8d4b5e | 510 | /* no support for \&CORE::infix; |
d885f758 | 511 | no support for funcs that do not parse like funcs */ |
88b892d8 | 512 | case KEY___DATA__: case KEY___END__: case KEY_and: case KEY_AUTOLOAD: |
a96df643 | 513 | case KEY_BEGIN : case KEY_CHECK : case KEY_cmp: |
eb31eb35 | 514 | case KEY_default : case KEY_DESTROY: |
88b892d8 | 515 | case KEY_do : case KEY_dump : case KEY_else : case KEY_elsif : |
d51f8b19 | 516 | case KEY_END : case KEY_eq : case KEY_eval : |
88b892d8 | 517 | case KEY_for : case KEY_foreach: case KEY_format: case KEY_ge : |
498a02d8 | 518 | case KEY_given : case KEY_goto : case KEY_grep : |
88b892d8 FC |
519 | case KEY_gt : case KEY_if: case KEY_INIT: case KEY_last: case KEY_le: |
520 | case KEY_local: case KEY_lt: case KEY_m : case KEY_map : case KEY_my: | |
521 | case KEY_ne : case KEY_next : case KEY_no: case KEY_or: case KEY_our: | |
1efec5ed | 522 | case KEY_package: case KEY_print: case KEY_printf: |
919ad5f7 | 523 | case KEY_q : case KEY_qq : case KEY_qr : case KEY_qw : |
88b892d8 | 524 | case KEY_qx : case KEY_redo : case KEY_require: case KEY_return: |
d33bb3da | 525 | case KEY_s : case KEY_say : case KEY_sort : |
d80ed303 | 526 | case KEY_state: case KEY_sub : |
46bef06f | 527 | case KEY_tr : case KEY_UNITCHECK: case KEY_unless: |
88b892d8 FC |
528 | case KEY_until: case KEY_use : case KEY_when : case KEY_while : |
529 | case KEY_x : case KEY_xor : case KEY_y : | |
0f8d4b5e FC |
530 | return NULL; |
531 | case KEY_chdir: | |
eb31eb35 | 532 | case KEY_chomp: case KEY_chop: case KEY_defined: case KEY_delete: |
d51f8b19 | 533 | case KEY_each : case KEY_eof : case KEY_exec : case KEY_exists: |
0f8d4b5e FC |
534 | case KEY_keys: |
535 | case KEY_lstat: | |
536 | case KEY_pop: | |
537 | case KEY_push: | |
538 | case KEY_shift: | |
a99f2ca2 | 539 | case KEY_splice: case KEY_split: |
0f8d4b5e FC |
540 | case KEY_stat: |
541 | case KEY_system: | |
542 | case KEY_truncate: case KEY_unlink: | |
543 | case KEY_unshift: | |
544 | case KEY_values: | |
545 | ampable = FALSE; | |
546 | } | |
547 | if (!gv) { | |
548 | gv = (GV *)newSV(0); | |
549 | gv_init(gv, stash, name, len, TRUE); | |
550 | } | |
7e68c38b | 551 | GvMULTI_on(gv); |
0f8d4b5e FC |
552 | if (ampable) { |
553 | ENTER; | |
554 | oldcurcop = PL_curcop; | |
555 | oldparser = PL_parser; | |
556 | lex_start(NULL, NULL, 0); | |
557 | oldcompcv = PL_compcv; | |
558 | PL_compcv = NULL; /* Prevent start_subparse from setting | |
559 | CvOUTSIDE. */ | |
560 | oldsavestack_ix = start_subparse(FALSE,0); | |
561 | cv = PL_compcv; | |
562 | } | |
563 | else { | |
564 | /* Avoid calling newXS, as it calls us, and things start to | |
565 | get hairy. */ | |
566 | cv = MUTABLE_CV(newSV_type(SVt_PVCV)); | |
567 | GvCV_set(gv,cv); | |
568 | GvCVGEN(gv) = 0; | |
0f8d4b5e FC |
569 | CvISXSUB_on(cv); |
570 | CvXSUB(cv) = core_xsub; | |
eacbb379 | 571 | PoisonPADLIST(cv); |
0f8d4b5e FC |
572 | } |
573 | CvGV_set(cv, gv); /* This stops new ATTRSUB from setting CvFILE | |
574 | from PL_curcop. */ | |
9b669ea1 DD |
575 | /* XSUBs can't be perl lang/perl5db.pl debugged |
576 | if (PERLDB_LINE_OR_SAVESRC) | |
577 | (void)gv_fetchfile(file); */ | |
0f8d4b5e FC |
578 | CvFILE(cv) = (char *)file; |
579 | /* XXX This is inefficient, as doing things this order causes | |
580 | a prototype check in newATTRSUB. But we have to do | |
581 | it this order as we need an op number before calling | |
582 | new ATTRSUB. */ | |
583 | (void)core_prototype((SV *)cv, name, code, &opnum); | |
87566176 | 584 | if (stash) |
73c02f15 | 585 | (void)hv_store(stash,name,len,(SV *)gv,0); |
0f8d4b5e | 586 | if (ampable) { |
4428fb0e TC |
587 | #ifdef DEBUGGING |
588 | CV *orig_cv = cv; | |
589 | #endif | |
0f8d4b5e | 590 | CvLVALUE_on(cv); |
4428fb0e TC |
591 | /* newATTRSUB will free the CV and return NULL if we're still |
592 | compiling after a syntax error */ | |
e8f91c91 | 593 | if ((cv = newATTRSUB_x( |
7e68c38b | 594 | oldsavestack_ix, (OP *)gv, |
0f8d4b5e FC |
595 | NULL,NULL, |
596 | coresub_op( | |
597 | opnum | |
598 | ? newSVuv((UV)opnum) | |
599 | : newSVpvn(name,len), | |
600 | code, opnum | |
7e68c38b | 601 | ), |
e8f91c91 | 602 | TRUE |
4428fb0e TC |
603 | )) != NULL) { |
604 | assert(GvCV(gv) == orig_cv); | |
605 | if (opnum != OP_VEC && opnum != OP_SUBSTR && opnum != OP_POS | |
606 | && opnum != OP_UNDEF) | |
607 | CvLVALUE_off(cv); /* Now *that* was a neat trick. */ | |
608 | } | |
0f8d4b5e FC |
609 | LEAVE; |
610 | PL_parser = oldparser; | |
611 | PL_curcop = oldcurcop; | |
612 | PL_compcv = oldcompcv; | |
613 | } | |
4428fb0e TC |
614 | if (cv) { |
615 | SV *opnumsv = opnum ? newSVuv((UV)opnum) : (SV *)NULL; | |
616 | cv_set_call_checker( | |
617 | cv, Perl_ck_entersub_args_core, opnumsv ? opnumsv : (SV *)cv | |
618 | ); | |
619 | SvREFCNT_dec(opnumsv); | |
620 | } | |
621 | ||
0f8d4b5e FC |
622 | return gv; |
623 | } | |
624 | ||
954c1994 | 625 | /* |
6c53d59b FC |
626 | =for apidoc gv_fetchmeth |
627 | ||
628 | Like L</gv_fetchmeth_pvn>, but lacks a flags parameter. | |
629 | ||
e6919483 BF |
630 | =for apidoc gv_fetchmeth_sv |
631 | ||
632 | Exactly like L</gv_fetchmeth_pvn>, but takes the name string in the form | |
633 | of an SV instead of a string/length pair. | |
634 | ||
635 | =cut | |
636 | */ | |
637 | ||
638 | GV * | |
639 | Perl_gv_fetchmeth_sv(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
640 | { | |
c290e187 | 641 | char *namepv; |
642 | STRLEN namelen; | |
643 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV; | |
644 | if (LIKELY(SvPOK_nog(namesv))) /* common case */ | |
645 | return gv_fetchmeth_internal(stash, namesv, NULL, 0, level, flags); | |
646 | namepv = SvPV(namesv, namelen); | |
647 | if (SvUTF8(namesv)) flags |= SVf_UTF8; | |
648 | return gv_fetchmeth_pvn(stash, namepv, namelen, level, flags); | |
e6919483 BF |
649 | } |
650 | ||
651 | /* | |
652 | =for apidoc gv_fetchmeth_pv | |
653 | ||
654 | Exactly like L</gv_fetchmeth_pvn>, but takes a nul-terminated string | |
655 | instead of a string/length pair. | |
656 | ||
657 | =cut | |
658 | */ | |
659 | ||
660 | GV * | |
661 | Perl_gv_fetchmeth_pv(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
662 | { | |
663 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV; | |
c6afe666 | 664 | return gv_fetchmeth_internal(stash, NULL, name, strlen(name), level, flags); |
e6919483 BF |
665 | } |
666 | ||
667 | /* | |
668 | =for apidoc gv_fetchmeth_pvn | |
954c1994 GS |
669 | |
670 | Returns the glob with the given C<name> and a defined subroutine or | |
671 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
796b6530 | 672 | accessible via C<@ISA> and C<UNIVERSAL::>. |
954c1994 GS |
673 | |
674 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
675 | side-effect creates a glob with the given C<name> in the given C<stash> | |
676 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 677 | up caching info for this glob. |
954c1994 | 678 | |
796b6530 | 679 | The only significant values for C<flags> are C<GV_SUPER> and C<SVf_UTF8>. |
aae43805 | 680 | |
796b6530 | 681 | C<GV_SUPER> indicates that we want to look up the method in the superclasses |
aae43805 | 682 | of the C<stash>. |
e6919483 | 683 | |
aae43805 | 684 | The |
954c1994 | 685 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b | 686 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 687 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 688 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
689 | |
690 | =cut | |
691 | */ | |
692 | ||
e1a479c5 BB |
693 | /* NOTE: No support for tied ISA */ |
694 | ||
c6afe666 | 695 | PERL_STATIC_INLINE GV* |
696 | S_gv_fetchmeth_internal(pTHX_ HV* stash, SV* meth, const char* name, STRLEN len, I32 level, U32 flags) | |
79072805 | 697 | { |
463ee0b2 | 698 | GV** gvp; |
c6afe666 | 699 | HE* he; |
e1a479c5 BB |
700 | AV* linear_av; |
701 | SV** linear_svp; | |
702 | SV* linear_sv; | |
aae43805 | 703 | HV* cstash, *cachestash; |
e1a479c5 BB |
704 | GV* candidate = NULL; |
705 | CV* cand_cv = NULL; | |
e1a479c5 | 706 | GV* topgv = NULL; |
bfcb3514 | 707 | const char *hvname; |
c6afe666 | 708 | I32 create = (level >= 0) ? HV_FETCH_LVALUE : 0; |
e1a479c5 | 709 | I32 items; |
e1a479c5 | 710 | U32 topgen_cmp; |
04f3bf56 | 711 | U32 is_utf8 = flags & SVf_UTF8; |
a0d0e21e | 712 | |
af09ea45 IK |
713 | /* UNIVERSAL methods should be callable without a stash */ |
714 | if (!stash) { | |
e1a479c5 | 715 | create = 0; /* probably appropriate */ |
da51bb9b | 716 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
717 | return 0; |
718 | } | |
719 | ||
e1a479c5 BB |
720 | assert(stash); |
721 | ||
bfcb3514 NC |
722 | hvname = HvNAME_get(stash); |
723 | if (!hvname) | |
e1a479c5 | 724 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 725 | |
e1a479c5 | 726 | assert(hvname); |
55df6700 | 727 | assert(name || meth); |
463ee0b2 | 728 | |
aae43805 | 729 | DEBUG_o( Perl_deb(aTHX_ "Looking for %smethod %s in package %s\n", |
55df6700 FC |
730 | flags & GV_SUPER ? "SUPER " : "", |
731 | name ? name : SvPV_nolen(meth), hvname) ); | |
44a8e56a | 732 | |
dd69841b | 733 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 | 734 | |
aae43805 | 735 | if (flags & GV_SUPER) { |
1a33a059 FC |
736 | if (!HvAUX(stash)->xhv_mro_meta->super) |
737 | HvAUX(stash)->xhv_mro_meta->super = newHV(); | |
738 | cachestash = HvAUX(stash)->xhv_mro_meta->super; | |
aae43805 FC |
739 | } |
740 | else cachestash = stash; | |
741 | ||
e1a479c5 | 742 | /* check locally for a real method or a cache entry */ |
c6afe666 | 743 | he = (HE*)hv_common( |
744 | cachestash, meth, name, len, (flags & SVf_UTF8) ? HVhek_UTF8 : 0, create, NULL, 0 | |
745 | ); | |
746 | if (he) gvp = (GV**)&HeVAL(he); | |
747 | else gvp = NULL; | |
748 | ||
e1a479c5 BB |
749 | if(gvp) { |
750 | topgv = *gvp; | |
0f8d4b5e | 751 | have_gv: |
e1a479c5 BB |
752 | assert(topgv); |
753 | if (SvTYPE(topgv) != SVt_PVGV) | |
55df6700 FC |
754 | { |
755 | if (!name) | |
756 | name = SvPV_nomg(meth, len); | |
04ec7e59 | 757 | gv_init_pvn(topgv, stash, name, len, GV_ADDMULTI|is_utf8); |
55df6700 | 758 | } |
e1a479c5 BB |
759 | if ((cand_cv = GvCV(topgv))) { |
760 | /* If genuine method or valid cache entry, use it */ | |
761 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
762 | return topgv; | |
763 | } | |
764 | else { | |
765 | /* stale cache entry, junk it and move on */ | |
e7881358 | 766 | SvREFCNT_dec_NN(cand_cv); |
c43ae56f DM |
767 | GvCV_set(topgv, NULL); |
768 | cand_cv = NULL; | |
e1a479c5 BB |
769 | GvCVGEN(topgv) = 0; |
770 | } | |
771 | } | |
772 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
773 | /* cache indicates no such method definitively */ | |
774 | return 0; | |
775 | } | |
aae43805 FC |
776 | else if (stash == cachestash |
777 | && len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4 | |
0f8d4b5e | 778 | && strnEQ(hvname, "CORE", 4) |
87566176 | 779 | && S_maybe_add_coresub(aTHX_ NULL,topgv,name,len)) |
0f8d4b5e | 780 | goto have_gv; |
463ee0b2 | 781 | } |
79072805 | 782 | |
aae43805 | 783 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ |
e1a479c5 BB |
784 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
785 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
786 | while (items--) { | |
787 | linear_sv = *linear_svp++; | |
788 | assert(linear_sv); | |
789 | cstash = gv_stashsv(linear_sv, 0); | |
790 | ||
dd69841b | 791 | if (!cstash) { |
ecad31f0 | 792 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), |
d0c0e7dd | 793 | "Can't locate package %"SVf" for @%"HEKf"::ISA", |
ecad31f0 | 794 | SVfARG(linear_sv), |
d0c0e7dd | 795 | HEKfARG(HvNAME_HEK(stash))); |
e1a479c5 BB |
796 | continue; |
797 | } | |
9607fc9c | 798 | |
e1a479c5 BB |
799 | assert(cstash); |
800 | ||
c60dbbc3 | 801 | gvp = (GV**)hv_fetch(cstash, name, is_utf8 ? -(I32)len : (I32)len, 0); |
0f8d4b5e FC |
802 | if (!gvp) { |
803 | if (len > 1 && HvNAMELEN_get(cstash) == 4) { | |
804 | const char *hvname = HvNAME(cstash); assert(hvname); | |
805 | if (strnEQ(hvname, "CORE", 4) | |
806 | && (candidate = | |
87566176 | 807 | S_maybe_add_coresub(aTHX_ cstash,NULL,name,len) |
0f8d4b5e FC |
808 | )) |
809 | goto have_candidate; | |
810 | } | |
811 | continue; | |
812 | } | |
813 | else candidate = *gvp; | |
814 | have_candidate: | |
e1a479c5 | 815 | assert(candidate); |
04f3bf56 | 816 | if (SvTYPE(candidate) != SVt_PVGV) |
04ec7e59 | 817 | gv_init_pvn(candidate, cstash, name, len, GV_ADDMULTI|is_utf8); |
e1a479c5 BB |
818 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { |
819 | /* | |
820 | * Found real method, cache method in topgv if: | |
821 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
822 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
823 | */ | |
824 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
825 | CV *old_cv = GvCV(topgv); |
826 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 827 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 828 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
829 | GvCVGEN(topgv) = topgen_cmp; |
830 | } | |
831 | return candidate; | |
832 | } | |
833 | } | |
9607fc9c | 834 | |
e1a479c5 BB |
835 | /* Check UNIVERSAL without caching */ |
836 | if(level == 0 || level == -1) { | |
55df6700 FC |
837 | candidate = gv_fetchmeth_internal(NULL, meth, name, len, 1, |
838 | flags &~GV_SUPER); | |
e1a479c5 BB |
839 | if(candidate) { |
840 | cand_cv = GvCV(candidate); | |
841 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
842 | CV *old_cv = GvCV(topgv); |
843 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 844 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 845 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
846 | GvCVGEN(topgv) = topgen_cmp; |
847 | } | |
848 | return candidate; | |
849 | } | |
850 | } | |
851 | ||
852 | if (topgv && GvREFCNT(topgv) == 1) { | |
853 | /* cache the fact that the method is not defined */ | |
854 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
855 | } |
856 | ||
79072805 LW |
857 | return 0; |
858 | } | |
859 | ||
c6afe666 | 860 | GV * |
861 | Perl_gv_fetchmeth_pvn(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) | |
862 | { | |
863 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN; | |
864 | return gv_fetchmeth_internal(stash, NULL, name, len, level, flags); | |
865 | } | |
866 | ||
954c1994 | 867 | /* |
460e5730 FC |
868 | =for apidoc gv_fetchmeth_autoload |
869 | ||
870 | This is the old form of L</gv_fetchmeth_pvn_autoload>, which has no flags | |
871 | parameter. | |
872 | ||
d21989ed | 873 | =for apidoc gv_fetchmeth_sv_autoload |
611c1e95 | 874 | |
d21989ed BF |
875 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes the name string in the form |
876 | of an SV instead of a string/length pair. | |
877 | ||
878 | =cut | |
879 | */ | |
880 | ||
881 | GV * | |
882 | Perl_gv_fetchmeth_sv_autoload(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
883 | { | |
884 | char *namepv; | |
885 | STRLEN namelen; | |
886 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV_AUTOLOAD; | |
887 | namepv = SvPV(namesv, namelen); | |
888 | if (SvUTF8(namesv)) | |
889 | flags |= SVf_UTF8; | |
890 | return gv_fetchmeth_pvn_autoload(stash, namepv, namelen, level, flags); | |
891 | } | |
892 | ||
893 | /* | |
894 | =for apidoc gv_fetchmeth_pv_autoload | |
895 | ||
896 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes a nul-terminated string | |
897 | instead of a string/length pair. | |
898 | ||
899 | =cut | |
900 | */ | |
901 | ||
902 | GV * | |
903 | Perl_gv_fetchmeth_pv_autoload(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
904 | { | |
905 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV_AUTOLOAD; | |
906 | return gv_fetchmeth_pvn_autoload(stash, name, strlen(name), level, flags); | |
907 | } | |
908 | ||
909 | /* | |
910 | =for apidoc gv_fetchmeth_pvn_autoload | |
911 | ||
796b6530 | 912 | Same as C<gv_fetchmeth_pvn()>, but looks for autoloaded subroutines too. |
611c1e95 IZ |
913 | Returns a glob for the subroutine. |
914 | ||
915 | For an autoloaded subroutine without a GV, will create a GV even | |
796b6530 | 916 | if C<level < 0>. For an autoloaded subroutine without a stub, C<GvCV()> |
611c1e95 IZ |
917 | of the result may be zero. |
918 | ||
796b6530 | 919 | Currently, the only significant value for C<flags> is C<SVf_UTF8>. |
d21989ed | 920 | |
611c1e95 IZ |
921 | =cut |
922 | */ | |
923 | ||
924 | GV * | |
d21989ed | 925 | Perl_gv_fetchmeth_pvn_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) |
611c1e95 | 926 | { |
499321d3 | 927 | GV *gv = gv_fetchmeth_pvn(stash, name, len, level, flags); |
611c1e95 | 928 | |
d21989ed | 929 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN_AUTOLOAD; |
7918f24d | 930 | |
611c1e95 | 931 | if (!gv) { |
611c1e95 IZ |
932 | CV *cv; |
933 | GV **gvp; | |
934 | ||
935 | if (!stash) | |
6136c704 | 936 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b | 937 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 | 938 | return NULL; |
d21989ed | 939 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, flags))) |
6136c704 | 940 | return NULL; |
611c1e95 IZ |
941 | cv = GvCV(gv); |
942 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 943 | return NULL; |
611c1e95 IZ |
944 | /* Have an autoload */ |
945 | if (level < 0) /* Cannot do without a stub */ | |
d21989ed | 946 | gv_fetchmeth_pvn(stash, name, len, 0, flags); |
c60dbbc3 BF |
947 | gvp = (GV**)hv_fetch(stash, name, |
948 | (flags & SVf_UTF8) ? -(I32)len : (I32)len, (level >= 0)); | |
611c1e95 | 949 | if (!gvp) |
6136c704 | 950 | return NULL; |
611c1e95 IZ |
951 | return *gvp; |
952 | } | |
953 | return gv; | |
954 | } | |
955 | ||
956 | /* | |
954c1994 GS |
957 | =for apidoc gv_fetchmethod_autoload |
958 | ||
959 | Returns the glob which contains the subroutine to call to invoke the method | |
960 | on the C<stash>. In fact in the presence of autoloading this may be the | |
796b6530 | 961 | glob for "AUTOLOAD". In this case the corresponding variable C<$AUTOLOAD> is |
b267980d | 962 | already setup. |
954c1994 GS |
963 | |
964 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
965 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 966 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 967 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 968 | with a non-zero C<autoload> parameter. |
954c1994 | 969 | |
cec2d7b1 FC |
970 | These functions grant C<"SUPER"> token |
971 | as a prefix of the method name. Note | |
954c1994 GS |
972 | that if you want to keep the returned glob for a long time, you need to |
973 | check for it being "AUTOLOAD", since at the later time the call may load a | |
796b6530 | 974 | different subroutine due to C<$AUTOLOAD> changing its value. Use the glob |
cec2d7b1 | 975 | created as a side effect to do this. |
954c1994 | 976 | |
cec2d7b1 FC |
977 | These functions have the same side-effects as C<gv_fetchmeth> with |
978 | C<level==0>. The warning against passing the GV returned by | |
979 | C<gv_fetchmeth> to C<call_sv> applies equally to these functions. | |
954c1994 GS |
980 | |
981 | =cut | |
982 | */ | |
983 | ||
dc848c6f | 984 | GV * |
864dbfa3 | 985 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 986 | { |
547bb267 NC |
987 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
988 | ||
256d1bb2 NC |
989 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
990 | } | |
991 | ||
44130a26 BF |
992 | GV * |
993 | Perl_gv_fetchmethod_sv_flags(pTHX_ HV *stash, SV *namesv, U32 flags) | |
994 | { | |
995 | char *namepv; | |
996 | STRLEN namelen; | |
997 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_SV_FLAGS; | |
998 | namepv = SvPV(namesv, namelen); | |
999 | if (SvUTF8(namesv)) | |
1000 | flags |= SVf_UTF8; | |
1001 | return gv_fetchmethod_pvn_flags(stash, namepv, namelen, flags); | |
1002 | } | |
1003 | ||
1004 | GV * | |
1005 | Perl_gv_fetchmethod_pv_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
1006 | { | |
1007 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PV_FLAGS; | |
1008 | return gv_fetchmethod_pvn_flags(stash, name, strlen(name), flags); | |
1009 | } | |
1010 | ||
256d1bb2 NC |
1011 | /* Don't merge this yet, as it's likely to get a len parameter, and possibly |
1012 | even a U32 hash */ | |
1013 | GV * | |
44130a26 | 1014 | Perl_gv_fetchmethod_pvn_flags(pTHX_ HV *stash, const char *name, const STRLEN len, U32 flags) |
256d1bb2 | 1015 | { |
eb578fdb | 1016 | const char *nend; |
c445ea15 | 1017 | const char *nsplit = NULL; |
a0d0e21e | 1018 | GV* gv; |
0dae17bd | 1019 | HV* ostash = stash; |
c94593d0 | 1020 | const char * const origname = name; |
ad64d0ec | 1021 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 NC |
1022 | const U32 autoload = flags & GV_AUTOLOAD; |
1023 | const U32 do_croak = flags & GV_CROAK; | |
14d1dfbd | 1024 | const U32 is_utf8 = flags & SVf_UTF8; |
0dae17bd | 1025 | |
44130a26 | 1026 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PVN_FLAGS; |
7918f24d | 1027 | |
eff494dd | 1028 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 | 1029 | stash = NULL; |
c9bf4021 NC |
1030 | else { |
1031 | /* The only way stash can become NULL later on is if nsplit is set, | |
1032 | which in turn means that there is no need for a SVt_PVHV case | |
1033 | the error reporting code. */ | |
1034 | } | |
b267980d | 1035 | |
44130a26 | 1036 | for (nend = name; *nend || nend != (origname + len); nend++) { |
c94593d0 | 1037 | if (*nend == '\'') { |
a0d0e21e | 1038 | nsplit = nend; |
c94593d0 NC |
1039 | name = nend + 1; |
1040 | } | |
1041 | else if (*nend == ':' && *(nend + 1) == ':') { | |
1042 | nsplit = nend++; | |
1043 | name = nend + 1; | |
1044 | } | |
a0d0e21e LW |
1045 | } |
1046 | if (nsplit) { | |
7edbdc6b | 1047 | if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) { |
9607fc9c | 1048 | /* ->SUPER::method should really be looked up in original stash */ |
aae43805 FC |
1049 | stash = CopSTASH(PL_curcop); |
1050 | flags |= GV_SUPER; | |
cea2e8a9 | 1051 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
0308a534 | 1052 | origname, HvENAME_get(stash), name) ); |
4633a7c4 | 1053 | } |
aae43805 FC |
1054 | else if ((nsplit - origname) >= 7 && |
1055 | strnEQ(nsplit - 7, "::SUPER", 7)) { | |
1056 | /* don't autovifify if ->NoSuchStash::SUPER::method */ | |
1057 | stash = gv_stashpvn(origname, nsplit - origname - 7, is_utf8); | |
1058 | if (stash) flags |= GV_SUPER; | |
1059 | } | |
e189a56d | 1060 | else { |
af09ea45 | 1061 | /* don't autovifify if ->NoSuchStash::method */ |
14d1dfbd | 1062 | stash = gv_stashpvn(origname, nsplit - origname, is_utf8); |
e189a56d | 1063 | } |
0dae17bd | 1064 | ostash = stash; |
4633a7c4 LW |
1065 | } |
1066 | ||
14d1dfbd | 1067 | gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, flags); |
a0d0e21e | 1068 | if (!gv) { |
2f6e0fe7 | 1069 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
159b6efe | 1070 | gv = MUTABLE_GV(&PL_sv_yes); |
dc848c6f | 1071 | else if (autoload) |
c8416c26 BF |
1072 | gv = gv_autoload_pvn( |
1073 | ostash, name, nend - name, GV_AUTOLOAD_ISMETHOD|flags | |
1074 | ); | |
256d1bb2 NC |
1075 | if (!gv && do_croak) { |
1076 | /* Right now this is exclusively for the benefit of S_method_common | |
1077 | in pp_hot.c */ | |
1078 | if (stash) { | |
15e6cdd9 DG |
1079 | /* If we can't find an IO::File method, it might be a call on |
1080 | * a filehandle. If IO:File has not been loaded, try to | |
1081 | * require it first instead of croaking */ | |
1082 | const char *stash_name = HvNAME_get(stash); | |
31b05a0f FR |
1083 | if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File") |
1084 | && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL, | |
1085 | STR_WITH_LEN("IO/File.pm"), 0, | |
1086 | HV_FETCH_ISEXISTS, NULL, 0) | |
15e6cdd9 | 1087 | ) { |
31b05a0f | 1088 | require_pv("IO/File.pm"); |
14d1dfbd | 1089 | gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, flags); |
15e6cdd9 DG |
1090 | if (gv) |
1091 | return gv; | |
1092 | } | |
256d1bb2 | 1093 | Perl_croak(aTHX_ |
b17a0679 | 1094 | "Can't locate object method \"%"UTF8f |
d0c0e7dd | 1095 | "\" via package \"%"HEKf"\"", |
b17a0679 | 1096 | UTF8fARG(is_utf8, nend - name, name), |
d0c0e7dd | 1097 | HEKfARG(HvNAME_HEK(stash))); |
256d1bb2 NC |
1098 | } |
1099 | else { | |
ecad31f0 | 1100 | SV* packnamesv; |
256d1bb2 | 1101 | |
256d1bb2 | 1102 | if (nsplit) { |
ecad31f0 BF |
1103 | packnamesv = newSVpvn_flags(origname, nsplit - origname, |
1104 | SVs_TEMP | is_utf8); | |
256d1bb2 | 1105 | } else { |
017c5e4e | 1106 | packnamesv = error_report; |
256d1bb2 NC |
1107 | } |
1108 | ||
1109 | Perl_croak(aTHX_ | |
b17a0679 FC |
1110 | "Can't locate object method \"%"UTF8f |
1111 | "\" via package \"%"SVf"\"" | |
ecad31f0 | 1112 | " (perhaps you forgot to load \"%"SVf"\"?)", |
b17a0679 | 1113 | UTF8fARG(is_utf8, nend - name, name), |
ecad31f0 | 1114 | SVfARG(packnamesv), SVfARG(packnamesv)); |
256d1bb2 NC |
1115 | } |
1116 | } | |
463ee0b2 | 1117 | } |
dc848c6f | 1118 | else if (autoload) { |
9d4ba2ae | 1119 | CV* const cv = GvCV(gv); |
09280a33 CS |
1120 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
1121 | GV* stubgv; | |
1122 | GV* autogv; | |
1123 | ||
0c028dca | 1124 | if (CvANON(cv) || CvLEXICAL(cv)) |
09280a33 CS |
1125 | stubgv = gv; |
1126 | else { | |
1127 | stubgv = CvGV(cv); | |
1128 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
1129 | stubgv = gv; | |
1130 | } | |
c8416c26 BF |
1131 | autogv = gv_autoload_pvn(GvSTASH(stubgv), |
1132 | GvNAME(stubgv), GvNAMELEN(stubgv), | |
1133 | GV_AUTOLOAD_ISMETHOD | |
1134 | | (GvNAMEUTF8(stubgv) ? SVf_UTF8 : 0)); | |
dc848c6f | 1135 | if (autogv) |
1136 | gv = autogv; | |
1137 | } | |
1138 | } | |
44a8e56a | 1139 | |
1140 | return gv; | |
1141 | } | |
1142 | ||
1143 | GV* | |
0eeb01b9 | 1144 | Perl_gv_autoload_sv(pTHX_ HV *stash, SV* namesv, U32 flags) |
5fba3c91 BF |
1145 | { |
1146 | char *namepv; | |
1147 | STRLEN namelen; | |
0fe84f7c | 1148 | PERL_ARGS_ASSERT_GV_AUTOLOAD_SV; |
5fba3c91 BF |
1149 | namepv = SvPV(namesv, namelen); |
1150 | if (SvUTF8(namesv)) | |
1151 | flags |= SVf_UTF8; | |
0eeb01b9 | 1152 | return gv_autoload_pvn(stash, namepv, namelen, flags); |
5fba3c91 BF |
1153 | } |
1154 | ||
1155 | GV* | |
0eeb01b9 | 1156 | Perl_gv_autoload_pv(pTHX_ HV *stash, const char *namepv, U32 flags) |
5fba3c91 | 1157 | { |
0fe84f7c | 1158 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PV; |
0eeb01b9 | 1159 | return gv_autoload_pvn(stash, namepv, strlen(namepv), flags); |
5fba3c91 BF |
1160 | } |
1161 | ||
1162 | GV* | |
0eeb01b9 | 1163 | Perl_gv_autoload_pvn(pTHX_ HV *stash, const char *name, STRLEN len, U32 flags) |
44a8e56a | 1164 | { |
44a8e56a | 1165 | GV* gv; |
1166 | CV* cv; | |
1167 | HV* varstash; | |
1168 | GV* vargv; | |
1169 | SV* varsv; | |
c8416c26 BF |
1170 | SV *packname = NULL; |
1171 | U32 is_utf8 = flags & SVf_UTF8 ? SVf_UTF8 : 0; | |
44a8e56a | 1172 | |
0fe84f7c | 1173 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PVN; |
7918f24d | 1174 | |
7edbdc6b | 1175 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c | 1176 | return NULL; |
0dae17bd GS |
1177 | if (stash) { |
1178 | if (SvTYPE(stash) < SVt_PVHV) { | |
c8416c26 BF |
1179 | STRLEN packname_len = 0; |
1180 | const char * const packname_ptr = SvPV_const(MUTABLE_SV(stash), packname_len); | |
1181 | packname = newSVpvn_flags(packname_ptr, packname_len, | |
1182 | SVs_TEMP | SvUTF8(stash)); | |
5c284bb0 | 1183 | stash = NULL; |
0dae17bd | 1184 | } |
c8416c26 BF |
1185 | else |
1186 | packname = sv_2mortal(newSVhek(HvNAME_HEK(stash))); | |
aae43805 | 1187 | if (flags & GV_SUPER) sv_catpvs(packname, "::SUPER"); |
0dae17bd | 1188 | } |
257dc59d FC |
1189 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, |
1190 | is_utf8 | (flags & GV_SUPER)))) | |
a0714e2c | 1191 | return NULL; |
dc848c6f | 1192 | cv = GvCV(gv); |
1193 | ||
adb5a9ae | 1194 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 1195 | return NULL; |
ed850460 | 1196 | |
dc848c6f | 1197 | /* |
1198 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
1199 | */ | |
0eeb01b9 FC |
1200 | if ( |
1201 | !(flags & GV_AUTOLOAD_ISMETHOD) | |
1202 | && (GvCVGEN(gv) || GvSTASH(gv) != stash) | |
041457d9 | 1203 | ) |
d1d15184 | 1204 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
b17a0679 FC |
1205 | "Use of inherited AUTOLOAD for non-method %"SVf |
1206 | "::%"UTF8f"() is deprecated", | |
ecad31f0 | 1207 | SVfARG(packname), |
b17a0679 | 1208 | UTF8fARG(is_utf8, len, name)); |
44a8e56a | 1209 | |
aed2304a | 1210 | if (CvISXSUB(cv)) { |
bb619f37 FC |
1211 | /* Instead of forcing the XSUB do another lookup for $AUTOLOAD |
1212 | * and split that value on the last '::', pass along the same data | |
1213 | * via the SvPVX field in the CV, and the stash in CvSTASH. | |
8fa6a409 FC |
1214 | * |
1215 | * Due to an unfortunate accident of history, the SvPVX field | |
e1fa07e3 | 1216 | * serves two purposes. It is also used for the subroutine's pro- |
8fa6a409 FC |
1217 | * type. Since SvPVX has been documented as returning the sub name |
1218 | * for a long time, but not as returning the prototype, we have | |
1219 | * to preserve the SvPVX AUTOLOAD behaviour and put the prototype | |
1220 | * elsewhere. | |
1221 | * | |
1222 | * We put the prototype in the same allocated buffer, but after | |
1223 | * the sub name. The SvPOK flag indicates the presence of a proto- | |
1224 | * type. The CvAUTOLOAD flag indicates the presence of a sub name. | |
1225 | * If both flags are on, then SvLEN is used to indicate the end of | |
1226 | * the prototype (artificially lower than what is actually allo- | |
1227 | * cated), at the risk of having to reallocate a few bytes unneces- | |
1228 | * sarily--but that should happen very rarely, if ever. | |
1229 | * | |
1230 | * We use SvUTF8 for both prototypes and sub names, so if one is | |
1231 | * UTF8, the other must be upgraded. | |
adb5a9ae | 1232 | */ |
c68d9564 | 1233 | CvSTASH_set(cv, stash); |
8fa6a409 | 1234 | if (SvPOK(cv)) { /* Ouch! */ |
e7881358 | 1235 | SV * const tmpsv = newSVpvn_flags(name, len, is_utf8); |
8fa6a409 FC |
1236 | STRLEN ulen; |
1237 | const char *proto = CvPROTO(cv); | |
1238 | assert(proto); | |
1239 | if (SvUTF8(cv)) | |
1240 | sv_utf8_upgrade_flags_grow(tmpsv, 0, CvPROTOLEN(cv) + 2); | |
1241 | ulen = SvCUR(tmpsv); | |
1242 | SvCUR(tmpsv)++; /* include null in string */ | |
1243 | sv_catpvn_flags( | |
1244 | tmpsv, proto, CvPROTOLEN(cv), SV_CATBYTES*!SvUTF8(cv) | |
1245 | ); | |
1246 | SvTEMP_on(tmpsv); /* Allow theft */ | |
1247 | sv_setsv_nomg((SV *)cv, tmpsv); | |
05b525f4 | 1248 | SvTEMP_off(tmpsv); |
e7881358 | 1249 | SvREFCNT_dec_NN(tmpsv); |
8fa6a409 FC |
1250 | SvLEN(cv) = SvCUR(cv) + 1; |
1251 | SvCUR(cv) = ulen; | |
1252 | } | |
1253 | else { | |
1254 | sv_setpvn((SV *)cv, name, len); | |
1255 | SvPOK_off(cv); | |
1256 | if (is_utf8) | |
c8416c26 | 1257 | SvUTF8_on(cv); |
8fa6a409 FC |
1258 | else SvUTF8_off(cv); |
1259 | } | |
1260 | CvAUTOLOAD_on(cv); | |
adb5a9ae | 1261 | } |
adb5a9ae | 1262 | |
44a8e56a | 1263 | /* |
1264 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
1265 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
1266 | * use that, but for lack of anything better we will use the sub's | |
1267 | * original package to look up $AUTOLOAD. | |
1268 | */ | |
18691622 | 1269 | varstash = CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv)); |
5c7983e5 | 1270 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
1271 | ENTER; |
1272 | ||
c69033f2 | 1273 | if (!isGV(vargv)) { |
04ec7e59 | 1274 | gv_init_pvn(vargv, varstash, S_autoload, S_autolen, 0); |
c69033f2 | 1275 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 1276 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
1277 | #endif |
1278 | } | |
3d35f11b | 1279 | LEAVE; |
e203899d | 1280 | varsv = GvSVn(vargv); |
4bac9ae4 CS |
1281 | SvTAINTED_off(varsv); /* previous $AUTOLOAD taint is obsolete */ |
1282 | /* XXX: this process is not careful to avoid extra magic gets and sets; tied $AUTOLOAD will get noise */ | |
c8416c26 | 1283 | sv_setsv(varsv, packname); |
396482e1 | 1284 | sv_catpvs(varsv, "::"); |
d40bf27b NC |
1285 | /* Ensure SvSETMAGIC() is called if necessary. In particular, to clear |
1286 | tainting if $FOO::AUTOLOAD was previously tainted, but is not now. */ | |
61a9130e FC |
1287 | sv_catpvn_flags( |
1288 | varsv, name, len, | |
5bcd1ef4 | 1289 | SV_SMAGIC|(is_utf8 ? SV_CATUTF8 : SV_CATBYTES) |
61a9130e | 1290 | ); |
c8416c26 BF |
1291 | if (is_utf8) |
1292 | SvUTF8_on(varsv); | |
a0d0e21e LW |
1293 | return gv; |
1294 | } | |
1295 | ||
44a2ac75 YO |
1296 | |
1297 | /* require_tie_mod() internal routine for requiring a module | |
486ec47a | 1298 | * that implements the logic of automatic ties like %! and %- |
44a2ac75 YO |
1299 | * |
1300 | * The "gv" parameter should be the glob. | |
45cbc99a RGS |
1301 | * "varpv" holds the name of the var, used for error messages. |
1302 | * "namesv" holds the module name. Its refcount will be decremented. | |
44a2ac75 | 1303 | * "methpv" holds the method name to test for to check that things |
45cbc99a RGS |
1304 | * are working reasonably close to as expected. |
1305 | * "flags": if flag & 1 then save the scalar before loading. | |
44a2ac75 YO |
1306 | * For the protection of $! to work (it is set by this routine) |
1307 | * the sv slot must already be magicalized. | |
d2c93421 | 1308 | */ |
44a2ac75 YO |
1309 | STATIC HV* |
1310 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) | |
d2c93421 | 1311 | { |
da51bb9b | 1312 | HV* stash = gv_stashsv(namesv, 0); |
45cbc99a | 1313 | |
7918f24d NC |
1314 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
1315 | ||
0ea03996 | 1316 | if (!stash || !(gv_fetchmethod_autoload(stash, methpv, FALSE))) { |
45cbc99a RGS |
1317 | SV *module = newSVsv(namesv); |
1318 | char varname = *varpv; /* varpv might be clobbered by load_module, | |
1319 | so save it. For the moment it's always | |
1320 | a single char. */ | |
b82b06b8 | 1321 | const char type = varname == '[' ? '$' : '%'; |
61bac25c | 1322 | #ifdef DEBUGGING |
d2c93421 | 1323 | dSP; |
61bac25c | 1324 | #endif |
d2c93421 | 1325 | ENTER; |
600beb2e | 1326 | SAVEFREESV(namesv); |
44a2ac75 | 1327 | if ( flags & 1 ) |
45cbc99a RGS |
1328 | save_scalar(gv); |
1329 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); | |
61bac25c | 1330 | assert(sp == PL_stack_sp); |
da51bb9b | 1331 | stash = gv_stashsv(namesv, 0); |
44a2ac75 | 1332 | if (!stash) |
b82b06b8 FC |
1333 | Perl_croak(aTHX_ "panic: Can't use %c%c because %"SVf" is not available", |
1334 | type, varname, SVfARG(namesv)); | |
45cbc99a | 1335 | else if (!gv_fetchmethod(stash, methpv)) |
b82b06b8 FC |
1336 | Perl_croak(aTHX_ "panic: Can't use %c%c because %"SVf" does not support method %s", |
1337 | type, varname, SVfARG(namesv), methpv); | |
600beb2e | 1338 | LEAVE; |
d2c93421 | 1339 | } |
e7881358 | 1340 | else SvREFCNT_dec_NN(namesv); |
44a2ac75 | 1341 | return stash; |
d2c93421 RH |
1342 | } |
1343 | ||
954c1994 GS |
1344 | /* |
1345 | =for apidoc gv_stashpv | |
1346 | ||
da51bb9b | 1347 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 1348 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
1349 | |
1350 | =cut | |
1351 | */ | |
1352 | ||
a0d0e21e | 1353 | HV* |
864dbfa3 | 1354 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 1355 | { |
7918f24d | 1356 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 1357 | return gv_stashpvn(name, strlen(name), create); |
1358 | } | |
1359 | ||
bc96cb06 SH |
1360 | /* |
1361 | =for apidoc gv_stashpvn | |
1362 | ||
da51bb9b NC |
1363 | Returns a pointer to the stash for a specified package. The C<namelen> |
1364 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
1365 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
1366 | created if it does not already exist. If the package does not exist and | |
796b6530 | 1367 | C<flags> is 0 (or any other setting that does not create packages) then C<NULL> |
da51bb9b NC |
1368 | is returned. |
1369 | ||
566a4718 YO |
1370 | Flags may be one of: |
1371 | ||
1372 | GV_ADD | |
1373 | SVf_UTF8 | |
1374 | GV_NOADD_NOINIT | |
1375 | GV_NOINIT | |
1376 | GV_NOEXPAND | |
1377 | GV_ADDMG | |
1378 | ||
796b6530 | 1379 | The most important of which are probably C<GV_ADD> and C<SVf_UTF8>. |
bc96cb06 | 1380 | |
808724c8 | 1381 | Note, use of C<gv_stashsv> instead of C<gv_stashpvn> where possible is strongly |
1382 | recommended for performance reasons. | |
1383 | ||
bc96cb06 SH |
1384 | =cut |
1385 | */ | |
1386 | ||
0eadbdad YO |
1387 | /* |
1388 | gv_stashpvn_internal | |
1389 | ||
1390 | Perform the internal bits of gv_stashsvpvn_cached. You could think of this | |
1391 | as being one half of the logic. Not to be called except from gv_stashsvpvn_cached(). | |
1392 | ||
1393 | */ | |
1394 | ||
4e7ebec5 | 1395 | PERL_STATIC_INLINE HV* |
0eadbdad | 1396 | S_gv_stashpvn_internal(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 1397 | { |
0cea0058 | 1398 | char smallbuf[128]; |
46fc3d4c | 1399 | char *tmpbuf; |
a0d0e21e LW |
1400 | HV *stash; |
1401 | GV *tmpgv; | |
add0ecde | 1402 | U32 tmplen = namelen + 2; |
dc437b57 | 1403 | |
0eadbdad | 1404 | PERL_ARGS_ASSERT_GV_STASHPVN_INTERNAL; |
7918f24d | 1405 | |
add0ecde | 1406 | if (tmplen <= sizeof smallbuf) |
46fc3d4c | 1407 | tmpbuf = smallbuf; |
1408 | else | |
add0ecde VP |
1409 | Newx(tmpbuf, tmplen, char); |
1410 | Copy(name, tmpbuf, namelen, char); | |
1411 | tmpbuf[namelen] = ':'; | |
1412 | tmpbuf[namelen+1] = ':'; | |
1413 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); | |
46fc3d4c | 1414 | if (tmpbuf != smallbuf) |
1415 | Safefree(tmpbuf); | |
d2fcb1d6 | 1416 | if (!tmpgv || !isGV_with_GP(tmpgv)) |
da51bb9b | 1417 | return NULL; |
a0d0e21e | 1418 | stash = GvHV(tmpgv); |
1f656fcf | 1419 | if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL; |
9efb5c72 | 1420 | assert(stash); |
1f656fcf | 1421 | if (!HvNAME_get(stash)) { |
0be4d16f | 1422 | hv_name_set(stash, name, namelen, flags & SVf_UTF8 ? SVf_UTF8 : 0 ); |
1f656fcf FC |
1423 | |
1424 | /* FIXME: This is a repeat of logic in gv_fetchpvn_flags */ | |
1425 | /* If the containing stash has multiple effective | |
1426 | names, see that this one gets them, too. */ | |
1427 | if (HvAUX(GvSTASH(tmpgv))->xhv_name_count) | |
1428 | mro_package_moved(stash, NULL, tmpgv, 1); | |
1429 | } | |
a0d0e21e | 1430 | return stash; |
463ee0b2 LW |
1431 | } |
1432 | ||
808724c8 | 1433 | /* |
1434 | gv_stashsvpvn_cached | |
1435 | ||
1436 | Returns a pointer to the stash for a specified package, possibly | |
1437 | cached. Implements both C<gv_stashpvn> and C<gc_stashsv>. | |
1438 | ||
1439 | Requires one of either namesv or namepv to be non-null. | |
1440 | ||
fbe13c60 | 1441 | See C<L</gv_stashpvn>> for details on "flags". |
808724c8 | 1442 | |
1443 | Note the sv interface is strongly preferred for performance reasons. | |
1444 | ||
1445 | */ | |
1446 | ||
1447 | #define PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED \ | |
1448 | assert(namesv || name) | |
1449 | ||
1450 | PERL_STATIC_INLINE HV* | |
1451 | S_gv_stashsvpvn_cached(pTHX_ SV *namesv, const char *name, U32 namelen, I32 flags) | |
4e7ebec5 | 1452 | { |
1453 | HV* stash; | |
808724c8 | 1454 | HE* he; |
1455 | ||
1456 | PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED; | |
1457 | ||
1458 | he = (HE *)hv_common( | |
1459 | PL_stashcache, namesv, name, namelen, | |
4e7ebec5 | 1460 | (flags & SVf_UTF8) ? HVhek_UTF8 : 0, 0, NULL, 0 |
1461 | ); | |
808724c8 | 1462 | |
4e7ebec5 | 1463 | if (he) return INT2PTR(HV*,SvIVX(HeVAL(he))); |
d283e876 | 1464 | else if (flags & GV_CACHE_ONLY) return NULL; |
4e7ebec5 | 1465 | |
808724c8 | 1466 | if (namesv) { |
1467 | if (SvOK(namesv)) { /* prevent double uninit warning */ | |
1468 | STRLEN len; | |
1469 | name = SvPV_const(namesv, len); | |
1470 | namelen = len; | |
1471 | flags |= SvUTF8(namesv); | |
1472 | } else { | |
1473 | name = ""; namelen = 0; | |
1474 | } | |
1475 | } | |
0eadbdad YO |
1476 | stash = gv_stashpvn_internal(name, namelen, flags); |
1477 | ||
4e7ebec5 | 1478 | if (stash && namelen) { |
1479 | SV* const ref = newSViv(PTR2IV(stash)); | |
0eadbdad | 1480 | (void)hv_store(PL_stashcache, name, |
4e7ebec5 | 1481 | (flags & SVf_UTF8) ? -(I32)namelen : (I32)namelen, ref, 0); |
1482 | } | |
808724c8 | 1483 | |
4e7ebec5 | 1484 | return stash; |
1485 | } | |
1486 | ||
808724c8 | 1487 | HV* |
1488 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) | |
1489 | { | |
1490 | PERL_ARGS_ASSERT_GV_STASHPVN; | |
1491 | return gv_stashsvpvn_cached(NULL, name, namelen, flags); | |
1492 | } | |
1493 | ||
954c1994 GS |
1494 | /* |
1495 | =for apidoc gv_stashsv | |
1496 | ||
fbe13c60 KW |
1497 | Returns a pointer to the stash for a specified package. See |
1498 | C<L</gv_stashpvn>>. | |
954c1994 | 1499 | |
fbe13c60 KW |
1500 | Note this interface is strongly preferred over C<gv_stashpvn> for performance |
1501 | reasons. | |
808724c8 | 1502 | |
954c1994 GS |
1503 | =cut |
1504 | */ | |
1505 | ||
a0d0e21e | 1506 | HV* |
da51bb9b | 1507 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 1508 | { |
7918f24d | 1509 | PERL_ARGS_ASSERT_GV_STASHSV; |
808724c8 | 1510 | return gv_stashsvpvn_cached(sv, NULL, 0, flags); |
a0d0e21e LW |
1511 | } |
1512 | ||
1513 | ||
463ee0b2 | 1514 | GV * |
fe9845cc | 1515 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) { |
7918f24d | 1516 | PERL_ARGS_ASSERT_GV_FETCHPV; |
b7787f18 | 1517 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
1518 | } |
1519 | ||
1520 | GV * | |
fe9845cc | 1521 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 1522 | STRLEN len; |
77cb3b01 FC |
1523 | const char * const nambeg = |
1524 | SvPV_flags_const(name, len, flags & GV_NO_SVGMAGIC ? 0 : SV_GMAGIC); | |
7918f24d | 1525 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
1526 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
1527 | } | |
1528 | ||
90aeefb4 | 1529 | PERL_STATIC_INLINE void |
290a1700 | 1530 | S_gv_magicalize_isa(pTHX_ GV *gv) |
ad7cce9f FR |
1531 | { |
1532 | AV* av; | |
1533 | ||
1534 | PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA; | |
1535 | ||
1536 | av = GvAVn(gv); | |
1537 | GvMULTI_on(gv); | |
1538 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, | |
1539 | NULL, 0); | |
ad7cce9f FR |
1540 | } |
1541 | ||
90aeefb4 BF |
1542 | /* This function grabs name and tries to split a stash and glob |
1543 | * from its contents. TODO better description, comments | |
1544 | * | |
1545 | * If the function returns TRUE and 'name == name_end', then | |
1546 | * 'gv' can be directly returned to the caller of gv_fetchpvn_flags | |
1547 | */ | |
1548 | PERL_STATIC_INLINE bool | |
1549 | S_parse_gv_stash_name(pTHX_ HV **stash, GV **gv, const char **name, | |
1550 | STRLEN *len, const char *nambeg, STRLEN full_len, | |
1551 | const U32 is_utf8, const I32 add) | |
1552 | { | |
1553 | const char *name_cursor; | |
1554 | const char *const name_end = nambeg + full_len; | |
1555 | const char *const name_em1 = name_end - 1; | |
1556 | ||
1557 | PERL_ARGS_ASSERT_PARSE_GV_STASH_NAME; | |
1558 | ||
1559 | if (full_len > 2 && **name == '*' && isIDFIRST_lazy_if(*name + 1, is_utf8)) { | |
1560 | /* accidental stringify on a GV? */ | |
1561 | (*name)++; | |
1562 | } | |
1563 | ||
1564 | for (name_cursor = *name; name_cursor < name_end; name_cursor++) { | |
1565 | if (name_cursor < name_em1 && | |
1566 | ((*name_cursor == ':' && name_cursor[1] == ':') | |
1567 | || *name_cursor == '\'')) | |
1568 | { | |
1569 | if (!*stash) | |
1570 | *stash = PL_defstash; | |
1571 | if (!*stash || !SvREFCNT(*stash)) /* symbol table under destruction */ | |
1572 | return FALSE; | |
1573 | ||
1574 | *len = name_cursor - *name; | |
1575 | if (name_cursor > nambeg) { /* Skip for initial :: or ' */ | |
1576 | const char *key; | |
1577 | GV**gvp; | |
1578 | if (*name_cursor == ':') { | |
1579 | key = *name; | |
1580 | *len += 2; | |
1581 | } | |
1582 | else { | |
1583 | char *tmpbuf; | |
1584 | Newx(tmpbuf, *len+2, char); | |
1585 | Copy(*name, tmpbuf, *len, char); | |
1586 | tmpbuf[(*len)++] = ':'; | |
1587 | tmpbuf[(*len)++] = ':'; | |
1588 | key = tmpbuf; | |
1589 | } | |
c161da64 | 1590 | gvp = (GV**)hv_fetch(*stash, key, is_utf8 ? -((I32)*len) : (I32)*len, add); |
90aeefb4 BF |
1591 | *gv = gvp ? *gvp : NULL; |
1592 | if (*gv && *gv != (const GV *)&PL_sv_undef) { | |
1593 | if (SvTYPE(*gv) != SVt_PVGV) | |
1594 | gv_init_pvn(*gv, *stash, key, *len, (add & GV_ADDMULTI)|is_utf8); | |
1595 | else | |
1596 | GvMULTI_on(*gv); | |
1597 | } | |
1598 | if (key != *name) | |
1599 | Safefree(key); | |
1600 | if (!*gv || *gv == (const GV *)&PL_sv_undef) | |
1601 | return FALSE; | |
1602 | ||
1603 | if (!(*stash = GvHV(*gv))) { | |
1604 | *stash = GvHV(*gv) = newHV(); | |
1605 | if (!HvNAME_get(*stash)) { | |
1606 | if (GvSTASH(*gv) == PL_defstash && *len == 6 | |
1607 | && strnEQ(*name, "CORE", 4)) | |
1608 | hv_name_set(*stash, "CORE", 4, 0); | |
1609 | else | |
1610 | hv_name_set( | |
1611 | *stash, nambeg, name_cursor-nambeg, is_utf8 | |
1612 | ); | |
1613 | /* If the containing stash has multiple effective | |
1614 | names, see that this one gets them, too. */ | |
1615 | if (HvAUX(GvSTASH(*gv))->xhv_name_count) | |
1616 | mro_package_moved(*stash, NULL, *gv, 1); | |
1617 | } | |
1618 | } | |
1619 | else if (!HvNAME_get(*stash)) | |
1620 | hv_name_set(*stash, nambeg, name_cursor - nambeg, is_utf8); | |
1621 | } | |
1622 | ||
1623 | if (*name_cursor == ':') | |
1624 | name_cursor++; | |
1625 | *name = name_cursor+1; | |
1626 | if (*name == name_end) { | |
1627 | if (!*gv) | |
1628 | *gv = MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); | |
1629 | return TRUE; | |
1630 | } | |
1631 | } | |
1632 | } | |
1633 | *len = name_cursor - *name; | |
1634 | return TRUE; | |
1635 | } | |
1636 | ||
536d1a88 | 1637 | /* Checks if an unqualified name is in the main stash */ |
90aeefb4 | 1638 | PERL_STATIC_INLINE bool |
536d1a88 | 1639 | S_gv_is_in_main(pTHX_ const char *name, STRLEN len, const U32 is_utf8) |
90aeefb4 | 1640 | { |
536d1a88 | 1641 | PERL_ARGS_ASSERT_GV_IS_IN_MAIN; |
90aeefb4 | 1642 | |
90aeefb4 | 1643 | /* If it's an alphanumeric variable */ |
536d1a88 | 1644 | if ( len && isIDFIRST_lazy_if(name, is_utf8) ) { |
90aeefb4 BF |
1645 | /* Some "normal" variables are always in main::, |
1646 | * like INC or STDOUT. | |
1647 | */ | |
1648 | switch (len) { | |
1649 | case 1: | |
1650 | if (*name == '_') | |
536d1a88 | 1651 | return TRUE; |
90aeefb4 BF |
1652 | break; |
1653 | case 3: | |
1654 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1655 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1656 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
536d1a88 | 1657 | return TRUE; |
90aeefb4 BF |
1658 | break; |
1659 | case 4: | |
1660 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1661 | && name[3] == 'V') | |
536d1a88 | 1662 | return TRUE; |
90aeefb4 BF |
1663 | break; |
1664 | case 5: | |
1665 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1666 | && name[3] == 'I' && name[4] == 'N') | |
536d1a88 | 1667 | return TRUE; |
90aeefb4 BF |
1668 | break; |
1669 | case 6: | |
1670 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1671 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1672 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
536d1a88 | 1673 | return TRUE; |
90aeefb4 BF |
1674 | break; |
1675 | case 7: | |
1676 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1677 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1678 | && name[6] == 'T') | |
536d1a88 | 1679 | return TRUE; |
90aeefb4 BF |
1680 | break; |
1681 | } | |
536d1a88 BF |
1682 | } |
1683 | /* *{""}, or a special variable like $@ */ | |
1684 | else | |
1685 | return TRUE; | |
1686 | ||
1687 | return FALSE; | |
1688 | } | |
1689 | ||
1690 | ||
1691 | /* This function is called if parse_gv_stash_name() failed to | |
1692 | * find a stash, or if GV_NOTQUAL or an empty name was passed | |
1693 | * to gv_fetchpvn_flags. | |
1694 | * | |
1695 | * It returns FALSE if the default stash can't be found nor created, | |
1696 | * which might happen during global destruction. | |
1697 | */ | |
1698 | PERL_STATIC_INLINE bool | |
1699 | S_find_default_stash(pTHX_ HV **stash, const char *name, STRLEN len, | |
1700 | const U32 is_utf8, const I32 add, | |
1701 | const svtype sv_type) | |
1702 | { | |
1703 | PERL_ARGS_ASSERT_FIND_DEFAULT_STASH; | |
1704 | ||
1705 | /* No stash in name, so see how we can default */ | |
90aeefb4 | 1706 | |
536d1a88 BF |
1707 | if ( gv_is_in_main(name, len, is_utf8) ) { |
1708 | *stash = PL_defstash; | |
1709 | } | |
1710 | else { | |
1711 | if (IN_PERL_COMPILETIME) { | |
90aeefb4 BF |
1712 | *stash = PL_curstash; |
1713 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
1714 | sv_type != SVt_PVCV && | |
1715 | sv_type != SVt_PVGV && | |
1716 | sv_type != SVt_PVFM && | |
1717 | sv_type != SVt_PVIO && | |
1718 | !(len == 1 && sv_type == SVt_PV && | |
1719 | (*name == 'a' || *name == 'b')) ) | |
1720 | { | |
c161da64 | 1721 | GV**gvp = (GV**)hv_fetch(*stash,name,is_utf8 ? -(I32)len : (I32)len,0); |
90aeefb4 BF |
1722 | if (!gvp || *gvp == (const GV *)&PL_sv_undef || |
1723 | SvTYPE(*gvp) != SVt_PVGV) | |
1724 | { | |
1725 | *stash = NULL; | |
1726 | } | |
1727 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || | |
1728 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1729 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
1730 | { | |
1731 | /* diag_listed_as: Variable "%s" is not imported%s */ | |
1732 | Perl_ck_warner_d( | |
1733 | aTHX_ packWARN(WARN_MISC), | |
1734 | "Variable \"%c%"UTF8f"\" is not imported", | |
1735 | sv_type == SVt_PVAV ? '@' : | |
1736 | sv_type == SVt_PVHV ? '%' : '$', | |
1737 | UTF8fARG(is_utf8, len, name)); | |
1738 | if (GvCVu(*gvp)) | |
1739 | Perl_ck_warner_d( | |
1740 | aTHX_ packWARN(WARN_MISC), | |
1741 | "\t(Did you mean &%"UTF8f" instead?)\n", | |
1742 | UTF8fARG(is_utf8, len, name) | |
1743 | ); | |
1744 | *stash = NULL; | |
1745 | } | |
1746 | } | |
1747 | } | |
1748 | else { | |
1749 | /* Use the current op's stash */ | |
1750 | *stash = CopSTASH(PL_curcop); | |
1751 | } | |
1752 | } | |
90aeefb4 BF |
1753 | |
1754 | if (!*stash) { | |
1755 | if (add && !PL_in_clean_all) { | |
10860bf4 FC |
1756 | GV *gv; |
1757 | qerror(Perl_mess(aTHX_ | |
90aeefb4 | 1758 | "Global symbol \"%s%"UTF8f |
d8c6310a FC |
1759 | "\" requires explicit package name (did you forget to " |
1760 | "declare \"my %s%"UTF8f"\"?)", | |
1761 | (sv_type == SVt_PV ? "$" | |
1762 | : sv_type == SVt_PVAV ? "@" | |
1763 | : sv_type == SVt_PVHV ? "%" | |
1764 | : ""), UTF8fARG(is_utf8, len, name), | |
90aeefb4 BF |
1765 | (sv_type == SVt_PV ? "$" |
1766 | : sv_type == SVt_PVAV ? "@" | |
1767 | : sv_type == SVt_PVHV ? "%" | |
10860bf4 | 1768 | : ""), UTF8fARG(is_utf8, len, name))); |
cd164bf8 BF |
1769 | /* To maintain the output of errors after the strict exception |
1770 | * above, and to keep compat with older releases, rather than | |
1771 | * placing the variables in the pad, we place | |
1772 | * them in the <none>:: stash. | |
1773 | */ | |
90aeefb4 BF |
1774 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
1775 | if (!gv) { | |
1776 | /* symbol table under destruction */ | |
1777 | return FALSE; | |
1778 | } | |
1779 | *stash = GvHV(gv); | |
1780 | } | |
1781 | else | |
1782 | return FALSE; | |
1783 | } | |
1784 | ||
1785 | if (!SvREFCNT(*stash)) /* symbol table under destruction */ | |
1786 | return FALSE; | |
1787 | ||
1788 | return TRUE; | |
1789 | } | |
1790 | ||
8c995aba FC |
1791 | /* gv_magicalize only turns on the SVf_READONLY flag, not SVf_PROTECT. So |
1792 | redefine SvREADONLY_on for that purpose. We don’t use it later on in | |
1793 | this file. */ | |
1794 | #undef SvREADONLY_on | |
1795 | #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY) | |
1796 | ||
930867a8 BF |
1797 | /* gv_magicalize() is called by gv_fetchpvn_flags when creating |
1798 | * a new GV. | |
1799 | * Note that it does not insert the GV into the stash prior to | |
1800 | * magicalization, which some variables require need in order | |
1801 | * to work (like $[, %+, %-, %!), so callers must take care of | |
1802 | * that beforehand. | |
1803 | * | |
1804 | * The return value has a specific meaning for gv_fetchpvn_flags: | |
1805 | * If it returns true, and the gv is empty, it indicates that its | |
1806 | * refcount should be decreased. | |
1807 | */ | |
1808 | PERL_STATIC_INLINE bool | |
1809 | S_gv_magicalize(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, | |
71c35c05 | 1810 | bool addmg, const svtype sv_type) |
79072805 | 1811 | { |
960b831f | 1812 | SSize_t paren; |
79072805 | 1813 | |
930867a8 | 1814 | PERL_ARGS_ASSERT_GV_MAGICALIZE; |
90aeefb4 | 1815 | |
44428a46 | 1816 | if (stash != PL_defstash) { /* not the main stash */ |
ea238638 | 1817 | /* We only have to check for a few names here: a, b, EXPORT, ISA |
4aaa4757 FC |
1818 | and VERSION. All the others apply only to the main stash or to |
1819 | CORE (which is checked right after this). */ | |
ea238638 | 1820 | if (len) { |
b464bac0 | 1821 | const char * const name2 = name + 1; |
cc4c2da6 | 1822 | switch (*name) { |
cc4c2da6 NC |
1823 | case 'E': |
1824 | if (strnEQ(name2, "XPORT", 5)) | |
1825 | GvMULTI_on(gv); | |
1826 | break; | |
1827 | case 'I': | |
44428a46 | 1828 | if (strEQ(name2, "SA")) |
290a1700 | 1829 | gv_magicalize_isa(gv); |
cc4c2da6 | 1830 | break; |
44428a46 FC |
1831 | case 'V': |
1832 | if (strEQ(name2, "ERSION")) | |
1833 | GvMULTI_on(gv); | |
1834 | break; | |
ea238638 FC |
1835 | case 'a': |
1836 | case 'b': | |
1837 | if (len == 1 && sv_type == SVt_PV) | |
1838 | GvMULTI_on(gv); | |
924ba076 | 1839 | /* FALLTHROUGH */ |
4aaa4757 FC |
1840 | default: |
1841 | goto try_core; | |
1842 | } | |
930867a8 | 1843 | return addmg; |
4aaa4757 FC |
1844 | } |
1845 | try_core: | |
1846 | if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) { | |
1847 | /* Avoid null warning: */ | |
1848 | const char * const stashname = HvNAME(stash); assert(stashname); | |
87566176 FC |
1849 | if (strnEQ(stashname, "CORE", 4)) |
1850 | S_maybe_add_coresub(aTHX_ 0, gv, name, len); | |
44428a46 FC |
1851 | } |
1852 | } | |
1853 | else if (len > 1) { | |
1854 | #ifndef EBCDIC | |
1855 | if (*name > 'V' ) { | |
1856 | NOOP; | |
1857 | /* Nothing else to do. | |
1858 | The compiler will probably turn the switch statement into a | |
1859 | branch table. Make sure we avoid even that small overhead for | |
2ae25f5c KW |
1860 | the common case of lower case variable names. (On EBCDIC |
1861 | platforms, we can't just do: | |
1862 | if (NATIVE_TO_ASCII(*name) > NATIVE_TO_ASCII('V') ) { | |
1863 | because cases like '\027' in the switch statement below are | |
1864 | C1 (non-ASCII) controls on those platforms, so the remapping | |
1865 | would make them larger than 'V') | |
1866 | */ | |
44428a46 FC |
1867 | } else |
1868 | #endif | |
1869 | { | |
3e669301 | 1870 | const char * name2 = name + 1; |
44428a46 FC |
1871 | switch (*name) { |
1872 | case 'A': | |
1873 | if (strEQ(name2, "RGV")) { | |
1874 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
1875 | } | |
1876 | else if (strEQ(name2, "RGVOUT")) { | |
1877 | GvMULTI_on(gv); | |
1878 | } | |
1879 | break; | |
1880 | case 'E': | |
1881 | if (strnEQ(name2, "XPORT", 5)) | |
1882 | GvMULTI_on(gv); | |
1883 | break; | |
1884 | case 'I': | |
1885 | if (strEQ(name2, "SA")) { | |
290a1700 | 1886 | gv_magicalize_isa(gv); |
44428a46 FC |
1887 | } |
1888 | break; | |
cc4c2da6 NC |
1889 | case 'S': |
1890 | if (strEQ(name2, "IG")) { | |
1891 | HV *hv; | |
1892 | I32 i; | |
d525a7b2 NC |
1893 | if (!PL_psig_name) { |
1894 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); | |
a02a5408 | 1895 | Newxz(PL_psig_pend, SIG_SIZE, int); |
d525a7b2 | 1896 | PL_psig_ptr = PL_psig_name + SIG_SIZE; |
0bdedcb3 NC |
1897 | } else { |
1898 | /* I think that the only way to get here is to re-use an | |
1899 | embedded perl interpreter, where the previous | |
1900 | use didn't clean up fully because | |
1901 | PL_perl_destruct_level was 0. I'm not sure that we | |
1902 | "support" that, in that I suspect in that scenario | |
1903 | there are sufficient other garbage values left in the | |
1904 | interpreter structure that something else will crash | |
1905 | before we get here. I suspect that this is one of | |
1906 | those "doctor, it hurts when I do this" bugs. */ | |
d525a7b2 | 1907 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); |
0bdedcb3 | 1908 | Zero(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 NC |
1909 | } |
1910 | GvMULTI_on(gv); | |
1911 | hv = GvHVn(gv); | |
a0714e2c | 1912 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 1913 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 1914 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
1915 | if (init) |
1916 | sv_setsv(*init, &PL_sv_undef); | |
cc4c2da6 NC |
1917 | } |
1918 | } | |
1919 | break; | |
1920 | case 'V': | |
1921 | if (strEQ(name2, "ERSION")) | |
1922 | GvMULTI_on(gv); | |
1923 | break; | |
e5218da5 GA |
1924 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1925 | if (strEQ(name2, "HILD_ERROR_NATIVE")) | |
1926 | goto magicalize; | |
1927 | break; | |
cc4c2da6 | 1928 | case '\005': /* $^ENCODING */ |
3e669301 KW |
1929 | if (*name2 == '_') { |
1930 | name2++; | |
1931 | } | |
cc4c2da6 NC |
1932 | if (strEQ(name2, "NCODING")) |
1933 | goto magicalize; | |
1934 | break; | |
9ebf26ad FR |
1935 | case '\007': /* $^GLOBAL_PHASE */ |
1936 | if (strEQ(name2, "LOBAL_PHASE")) | |
1937 | goto ro_magicalize; | |
1938 | break; | |
8561ea1d FC |
1939 | case '\014': /* $^LAST_FH */ |
1940 | if (strEQ(name2, "AST_FH")) | |
1941 | goto ro_magicalize; | |
1942 | break; | |
cde0cee5 | 1943 | case '\015': /* $^MATCH */ |
960b831f NC |
1944 | if (strEQ(name2, "ATCH")) { |
1945 | paren = RX_BUFF_IDX_CARET_FULLMATCH; | |
1946 | goto storeparen; | |
1947 | } | |
66230c86 | 1948 | break; |
cc4c2da6 NC |
1949 | case '\017': /* $^OPEN */ |
1950 | if (strEQ(name2, "PEN")) | |
1951 | goto magicalize; | |
1952 | break; | |
cde0cee5 | 1953 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
960b831f NC |
1954 | if (strEQ(name2, "REMATCH")) { |
1955 | paren = RX_BUFF_IDX_CARET_PREMATCH; | |
1956 | goto storeparen; | |
1957 | } | |
1958 | if (strEQ(name2, "OSTMATCH")) { | |
1959 | paren = RX_BUFF_IDX_CARET_POSTMATCH; | |
1960 | goto storeparen; | |
1961 | } | |
9ebf26ad | 1962 | break; |
cc4c2da6 NC |
1963 | case '\024': /* ${^TAINT} */ |
1964 | if (strEQ(name2, "AINT")) | |
1965 | goto ro_magicalize; | |
1966 | break; | |
7cebcbc0 | 1967 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 | 1968 | if (strEQ(name2, "NICODE")) |
cc4c2da6 | 1969 | goto ro_magicalize; |
a0288114 | 1970 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 | 1971 | goto ro_magicalize; |
e07ea26a NC |
1972 | if (strEQ(name2, "TF8CACHE")) |
1973 | goto magicalize; | |
cc4c2da6 NC |
1974 | break; |
1975 | case '\027': /* $^WARNING_BITS */ | |
1976 | if (strEQ(name2, "ARNING_BITS")) | |
1977 | goto magicalize; | |
8ca2a5d6 DD |
1978 | #ifdef WIN32 |
1979 | else if (strEQ(name2, "IN32_SLOPPY_STAT")) | |
1980 | goto magicalize; | |
1981 | #endif | |
cc4c2da6 NC |
1982 | break; |
1983 | case '1': | |
1984 | case '2': | |
1985 | case '3': | |
1986 | case '4': | |
1987 | case '5': | |
1988 | case '6': | |
1989 | case '7': | |
1990 | case '8': | |
1991 | case '9': | |
85e6fe83 | 1992 | { |
2fdbfb4d AB |
1993 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
1994 | this test */ | |
22ff3130 HS |
1995 | UV uv; |
1996 | if (!grok_atoUV(name, &uv, NULL) || uv > I32_MAX) | |
1997 | return addmg; | |
1998 | /* XXX why are we using a SSize_t? */ | |
1999 | paren = (SSize_t)(I32)uv; | |
960b831f | 2000 | goto storeparen; |
1d7c1841 | 2001 | } |
dc437b57 | 2002 | } |
93a17b20 | 2003 | } |
392db708 NC |
2004 | } else { |
2005 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
2006 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 | 2007 | switch (*name) { |
6361f656 | 2008 | case '&': /* $& */ |
960b831f NC |
2009 | paren = RX_BUFF_IDX_FULLMATCH; |
2010 | goto sawampersand; | |
6361f656 | 2011 | case '`': /* $` */ |
960b831f NC |
2012 | paren = RX_BUFF_IDX_PREMATCH; |
2013 | goto sawampersand; | |
6361f656 | 2014 | case '\'': /* $' */ |
960b831f NC |
2015 | paren = RX_BUFF_IDX_POSTMATCH; |
2016 | sawampersand: | |
1a904fc8 | 2017 | #ifdef PERL_SAWAMPERSAND |
a289ef89 | 2018 | if (!( |
cc4c2da6 NC |
2019 | sv_type == SVt_PVAV || |
2020 | sv_type == SVt_PVHV || | |
2021 | sv_type == SVt_PVCV || | |
2022 | sv_type == SVt_PVFM || | |
2023 | sv_type == SVt_PVIO | |
d3b97530 DM |
2024 | )) { PL_sawampersand |= |
2025 | (*name == '`') | |
2026 | ? SAWAMPERSAND_LEFT | |
2027 | : (*name == '&') | |
2028 | ? SAWAMPERSAND_MIDDLE | |
2029 | : SAWAMPERSAND_RIGHT; | |
2030 | } | |
1a904fc8 | 2031 | #endif |
960b831f | 2032 | goto storeparen; |
e91d8259 NC |
2033 | case '1': /* $1 */ |
2034 | case '2': /* $2 */ | |
2035 | case '3': /* $3 */ | |
2036 | case '4': /* $4 */ | |
2037 | case '5': /* $5 */ | |
2038 | case '6': /* $6 */ | |
2039 | case '7': /* $7 */ | |
2040 | case '8': /* $8 */ | |
2041 | case '9': /* $9 */ | |
960b831f NC |
2042 | paren = *name - '0'; |
2043 | ||
2044 | storeparen: | |
e91d8259 NC |
2045 | /* Flag the capture variables with a NULL mg_ptr |
2046 | Use mg_len for the array index to lookup. */ | |
960b831f | 2047 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, NULL, paren); |
e91d8259 | 2048 | break; |
cc4c2da6 | 2049 | |
6361f656 | 2050 | case ':': /* $: */ |
c69033f2 | 2051 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
2052 | goto magicalize; |
2053 | ||
6361f656 | 2054 | case '?': /* $? */ |
ff0cee69 | 2055 | #ifdef COMPLEX_STATUS |
c69033f2 | 2056 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 2057 | #endif |
cc4c2da6 | 2058 | goto magicalize; |
ff0cee69 | 2059 | |
6361f656 | 2060 | case '!': /* $! */ |
67261566 | 2061 | GvMULTI_on(gv); |
44a2ac75 | 2062 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 2063 | |
ad64d0ec | 2064 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 | 2065 | |
44a2ac75 | 2066 | /* magicalization must be done before require_tie_mod is called */ |
67261566 | 2067 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
ffdb8bcd | 2068 | { |
44a2ac75 | 2069 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
930867a8 | 2070 | addmg = FALSE; |
ffdb8bcd | 2071 | } |
d2c93421 | 2072 | |
6cef1e77 | 2073 | break; |
6361f656 AB |
2074 | case '-': /* $- */ |
2075 | case '+': /* $+ */ | |
44a2ac75 YO |
2076 | GvMULTI_on(gv); /* no used once warnings here */ |
2077 | { | |
44a2ac75 | 2078 | AV* const av = GvAVn(gv); |
ad64d0ec | 2079 | SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL; |
44a2ac75 | 2080 | |
ad64d0ec NC |
2081 | sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0); |
2082 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
67261566 | 2083 | if (avc) |
44a2ac75 | 2084 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 | 2085 | SvREADONLY_on(av); |
67261566 YO |
2086 | |
2087 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
213084e4 | 2088 | { |
192b9cd1 | 2089 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
930867a8 | 2090 | addmg = FALSE; |
213084e4 | 2091 | } |
67261566 | 2092 | |
80305961 | 2093 | break; |
cc4c2da6 | 2094 | } |
6361f656 AB |
2095 | case '*': /* $* */ |
2096 | case '#': /* $# */ | |
9b387841 | 2097 | if (sv_type == SVt_PV) |
4f650b80 | 2098 | /* diag_listed_as: $* is no longer supported */ |
9b387841 | 2099 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
4f650b80 | 2100 | "$%c is no longer supported", *name); |
8ae1fe26 | 2101 | break; |
b3ca2e83 NC |
2102 | case '\010': /* $^H */ |
2103 | { | |
2104 | HV *const hv = GvHVn(gv); | |
2105 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
2106 | } | |
2107 | goto magicalize; | |
b82b06b8 | 2108 | case '[': /* $[ */ |
7d69d4a6 | 2109 | if ((sv_type == SVt_PV || sv_type == SVt_PVGV) |
2846acbf | 2110 | && FEATURE_ARYBASE_IS_ENABLED) { |
b82b06b8 | 2111 | require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0); |
930867a8 | 2112 | addmg = FALSE; |
b82b06b8 | 2113 | } |
7d69d4a6 | 2114 | else goto magicalize; |
b82b06b8 | 2115 | break; |
cc4c2da6 | 2116 | case '\023': /* $^S */ |
2fdbfb4d AB |
2117 | ro_magicalize: |
2118 | SvREADONLY_on(GvSVn(gv)); | |
924ba076 | 2119 | /* FALLTHROUGH */ |
6361f656 | 2120 | case '0': /* $0 */ |
6361f656 AB |
2121 | case '^': /* $^ */ |
2122 | case '~': /* $~ */ | |
2123 | case '=': /* $= */ | |
2124 | case '%': /* $% */ | |
2125 | case '.': /* $. */ | |
2126 | case '(': /* $( */ | |
2127 | case ')': /* $) */ | |
2128 | case '<': /* $< */ | |
2129 | case '>': /* $> */ | |
2130 | case '\\': /* $\ */ | |
2131 | case '/': /* $/ */ | |
4505a31f | 2132 | case '|': /* $| */ |
9cdac2a2 | 2133 | case '$': /* $$ */ |
cc4c2da6 NC |
2134 | case '\001': /* $^A */ |
2135 | case '\003': /* $^C */ | |
2136 | case '\004': /* $^D */ | |
2137 | case '\005': /* $^E */ | |
2138 | case '\006': /* $^F */ | |
cc4c2da6 NC |
2139 | case '\011': /* $^I, NOT \t in EBCDIC */ |
2140 | case '\016': /* $^N */ | |
2141 | case '\017': /* $^O */ | |
2142 | case '\020': /* $^P */ | |
2143 | case '\024': /* $^T */ | |
2144 | case '\027': /* $^W */ | |
2145 | magicalize: | |
ad64d0ec | 2146 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
cc4c2da6 | 2147 | break; |
e521374c | 2148 | |
cc4c2da6 | 2149 | case '\014': /* $^L */ |
76f68e9b | 2150 | sv_setpvs(GvSVn(gv),"\f"); |
463ee0b2 | 2151 | break; |
6361f656 | 2152 | case ';': /* $; */ |
76f68e9b | 2153 | sv_setpvs(GvSVn(gv),"\034"); |
463ee0b2 | 2154 | break; |
6361f656 | 2155 | case ']': /* $] */ |
cc4c2da6 | 2156 | { |
3638bf15 | 2157 | SV * const sv = GvSV(gv); |
d7aa5382 | 2158 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 2159 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
2160 | GvSV(gv) = vnumify(PL_patchlevel); |
2161 | SvREADONLY_on(GvSV(gv)); | |
2162 | SvREFCNT_dec(sv); | |
93a17b20 LW |
2163 | } |
2164 | break; | |
cc4c2da6 NC |
2165 | case '\026': /* $^V */ |
2166 | { | |
3638bf15 | 2167 | SV * const sv = GvSV(gv); |
f9be5ac8 DM |
2168 | GvSV(gv) = new_version(PL_patchlevel); |
2169 | SvREADONLY_on(GvSV(gv)); | |
2170 | SvREFCNT_dec(sv); | |
16070b82 GS |
2171 | } |
2172 | break; | |
ea238638 FC |
2173 | case 'a': |
2174 | case 'b': | |
dc3e91f6 | 2175 | if (sv_type == SVt_PV) |
ea238638 | 2176 | GvMULTI_on(gv); |
cc4c2da6 | 2177 | } |
79072805 | 2178 | } |
930867a8 BF |
2179 | |
2180 | return addmg; | |
71c35c05 BF |
2181 | } |
2182 | ||
8c995aba FC |
2183 | /* If we do ever start using this later on in the file, we need to make |
2184 | sure we don’t accidentally use the wrong definition. */ | |
2185 | #undef SvREADONLY_on | |
2186 | ||
070dc475 BF |
2187 | /* This function is called when the stash already holds the GV of the magic |
2188 | * variable we're looking for, but we need to check that it has the correct | |
2189 | * kind of magic. For example, if someone first uses $! and then %!, the | |
2190 | * latter would end up here, and we add the Errno tie to the HASH slot of | |
2191 | * the *! glob. | |
2192 | */ | |
2193 | PERL_STATIC_INLINE void | |
2194 | S_maybe_multimagic_gv(pTHX_ GV *gv, const char *name, const svtype sv_type) | |
2195 | { | |
2196 | PERL_ARGS_ASSERT_MAYBE_MULTIMAGIC_GV; | |
2197 | ||
2198 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) { | |
2199 | if (*name == '!') | |
2200 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); | |
2201 | else if (*name == '-' || *name == '+') | |
2202 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); | |
2203 | } else if (sv_type == SVt_PV) { | |
2204 | if (*name == '*' || *name == '#') { | |
2205 | /* diag_listed_as: $* is no longer supported */ | |
2206 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, | |
2207 | WARN_SYNTAX), | |
2208 | "$%c is no longer supported", *name); | |
2209 | } | |
2210 | } | |
2211 | if (sv_type==SVt_PV || sv_type==SVt_PVGV) { | |
2212 | switch (*name) { | |
2213 | case '[': | |
2214 | require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0); | |
2215 | break; | |
2216 | #ifdef PERL_SAWAMPERSAND | |
2217 | case '`': | |
2218 | PL_sawampersand |= SAWAMPERSAND_LEFT; | |
2219 | (void)GvSVn(gv); | |
2220 | break; | |
2221 | case '&': | |
2222 | PL_sawampersand |= SAWAMPERSAND_MIDDLE; | |
2223 | (void)GvSVn(gv); | |
2224 | break; | |
2225 | case '\'': | |
2226 | PL_sawampersand |= SAWAMPERSAND_RIGHT; | |
2227 | (void)GvSVn(gv); | |
2228 | break; | |
2229 | #endif | |
2230 | } | |
2231 | } | |
2232 | } | |
2233 | ||
71c35c05 BF |
2234 | GV * |
2235 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
2236 | const svtype sv_type) | |
2237 | { | |
71c35c05 BF |
2238 | const char *name = nambeg; |
2239 | GV *gv = NULL; | |
2240 | GV**gvp; | |
2241 | STRLEN len; | |
2242 | HV *stash = NULL; | |
2243 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); | |
2244 | const I32 no_expand = flags & GV_NOEXPAND; | |
2245 | const I32 add = flags & ~GV_NOADD_MASK; | |
2246 | const U32 is_utf8 = flags & SVf_UTF8; | |
930867a8 | 2247 | bool addmg = cBOOL(flags & GV_ADDMG); |
71c35c05 BF |
2248 | const char *const name_end = nambeg + full_len; |
2249 | U32 faking_it; | |
2250 | ||
2251 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; | |
2252 | ||
2253 | /* If we have GV_NOTQUAL, the caller promised that | |
2254 | * there is no stash, so we can skip the check. | |
2255 | * Similarly if full_len is 0, since then we're | |
2256 | * dealing with something like *{""} or ""->foo() | |
2257 | */ | |
2258 | if ((flags & GV_NOTQUAL) || !full_len) { | |
2259 | len = full_len; | |
2260 | } | |
2261 | else if (parse_gv_stash_name(&stash, &gv, &name, &len, nambeg, full_len, is_utf8, add)) { | |
2262 | if (name == name_end) return gv; | |
2263 | } | |
2264 | else { | |
2265 | return NULL; | |
2266 | } | |
2267 | ||
2268 | if (!stash && !find_default_stash(&stash, name, len, is_utf8, add, sv_type)) { | |
2269 | return NULL; | |
2270 | } | |
2271 | ||
2272 | /* By this point we should have a stash and a name */ | |
c161da64 | 2273 | gvp = (GV**)hv_fetch(stash,name,is_utf8 ? -(I32)len : (I32)len,add); |
71c35c05 BF |
2274 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) { |
2275 | if (addmg) gv = (GV *)newSV(0); | |
2276 | else return NULL; | |
2277 | } | |
2278 | else gv = *gvp, addmg = 0; | |
2279 | /* From this point on, addmg means gv has not been inserted in the | |
2280 | symtab yet. */ | |
2281 | ||
2282 | if (SvTYPE(gv) == SVt_PVGV) { | |
c002ae9a BF |
2283 | /* The GV already exists, so return it, but check if we need to do |
2284 | * anything else with it before that. | |
2285 | */ | |
71c35c05 | 2286 | if (add) { |
c002ae9a BF |
2287 | /* This is the heuristic that handles if a variable triggers the |
2288 | * 'used only once' warning. If there's already a GV in the stash | |
2289 | * with this name, then we assume that the variable has been used | |
2290 | * before and turn its MULTI flag on. | |
2291 | * It's a heuristic because it can easily be "tricked", like with | |
2292 | * BEGIN { $a = 1; $::{foo} = *a }; () = $foo | |
2293 | * not warning about $main::foo being used just once | |
2294 | */ | |
71c35c05 BF |
2295 | GvMULTI_on(gv); |
2296 | gv_init_svtype(gv, sv_type); | |
2297 | /* You reach this path once the typeglob has already been created, | |
2298 | either by the same or a different sigil. If this path didn't | |
2299 | exist, then (say) referencing $! first, and %! second would | |
2300 | mean that %! was not handled correctly. */ | |
2301 | if (len == 1 && stash == PL_defstash) { | |
070dc475 | 2302 | maybe_multimagic_gv(gv, name, sv_type); |
71c35c05 BF |
2303 | } |
2304 | else if (len == 3 && sv_type == SVt_PVAV | |
2305 | && strnEQ(name, "ISA", 3) | |
2306 | && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv)))) | |
2307 | gv_magicalize_isa(gv); | |
2308 | } | |
2309 | return gv; | |
2310 | } else if (no_init) { | |
2311 | assert(!addmg); | |
2312 | return gv; | |
c002ae9a BF |
2313 | } |
2314 | /* If GV_NOEXPAND is true and what we got off the stash is a ref, | |
2315 | * don't expand it to a glob. This is an optimization so that things | |
2316 | * copying constants over, like Exporter, don't have to be rewritten | |
2317 | * to take into account that you can store more than just globs in | |
2318 | * stashes. | |
2319 | */ | |
2320 | else if (no_expand && SvROK(gv)) { | |
71c35c05 BF |
2321 | assert(!addmg); |
2322 | return gv; | |
2323 | } | |
2324 | ||
2325 | /* Adding a new symbol. | |
2326 | Unless of course there was already something non-GV here, in which case | |
2327 | we want to behave as if there was always a GV here, containing some sort | |
2328 | of subroutine. | |
2329 | Otherwise we run the risk of creating things like GvIO, which can cause | |
2330 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
2331 | ||
2332 | faking_it = SvOK(gv); | |
2333 | ||
2334 | if (add & GV_ADDWARN) | |
2335 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
2336 | "Had to create %"UTF8f" unexpectedly", | |
2337 | UTF8fARG(is_utf8, name_end-nambeg, nambeg)); | |
2338 | gv_init_pvn(gv, stash, name, len, (add & GV_ADDMULTI)|is_utf8); | |
2339 | ||
9e5de6ae | 2340 | if ( isIDFIRST_lazy_if(name, is_utf8) && !ckWARN(WARN_ONCE) ) |
71c35c05 BF |
2341 | GvMULTI_on(gv) ; |
2342 | ||
930867a8 BF |
2343 | /* First, store the gv in the symtab if we're adding magic, |
2344 | * but only for non-empty GVs | |
2345 | */ | |
2346 | #define GvEMPTY(gv) !(GvAV(gv) || GvHV(gv) || GvIO(gv) \ | |
2347 | || GvCV(gv) || (GvSV(gv) && SvOK(GvSV(gv)))) | |
2348 | ||
2349 | if ( addmg && !GvEMPTY(gv) ) { | |
2350 | (void)hv_store(stash,name,len,(SV *)gv,0); | |
2351 | } | |
2352 | ||
71c35c05 | 2353 | /* set up magic where warranted */ |
930867a8 BF |
2354 | if ( gv_magicalize(gv, stash, name, len, addmg, sv_type) ) { |
2355 | /* See 23496c6 */ | |
2356 | if (GvEMPTY(gv)) { | |
2357 | if ( GvSV(gv) && SvMAGICAL(GvSV(gv)) ) { | |
2358 | /* The GV was and still is "empty", except that now | |
2359 | * it has the magic flags turned on, so we want it | |
2360 | * stored in the symtab. | |
2361 | */ | |
2362 | (void)hv_store(stash,name,len,(SV *)gv,0); | |
2363 | } | |
2364 | else { | |
2365 | /* Most likely the temporary GV created above */ | |
2366 | SvREFCNT_dec_NN(gv); | |
2367 | gv = NULL; | |
2368 | } | |
2369 | } | |
2370 | } | |
71c35c05 | 2371 | |
e6066781 | 2372 | if (gv) gv_init_svtype(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 | 2373 | return gv; |
79072805 LW |
2374 | } |
2375 | ||
2376 | void | |
35a4481c | 2377 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2378 | { |
ed60a868 | 2379 | const char *name; |
35a4481c | 2380 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
2381 | |
2382 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
2383 | ||
666ea192 | 2384 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 2385 | |
52a6327b | 2386 | if (hv && (name = HvNAME(hv))) { |
ed60a868 FC |
2387 | const STRLEN len = HvNAMELEN(hv); |
2388 | if (keepmain || strnNE(name, "main", len)) { | |
2389 | sv_catpvn_flags(sv,name,len,HvNAMEUTF8(hv)?SV_CATUTF8:SV_CATBYTES); | |
396482e1 | 2390 | sv_catpvs(sv,"::"); |
ed60a868 | 2391 | } |
43693395 | 2392 | } |
ed60a868 | 2393 | else sv_catpvs(sv,"__ANON__::"); |
04f3bf56 | 2394 | sv_catsv(sv,sv_2mortal(newSVhek(GvNAME_HEK(gv)))); |
43693395 GS |
2395 | } |
2396 | ||
2397 | void | |
35a4481c | 2398 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2399 | { |
099be4f1 | 2400 | const GV * const egv = GvEGVx(gv); |
7918f24d NC |
2401 | |
2402 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
2403 | ||
46c461b5 | 2404 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
2405 | } |
2406 | ||
39a65960 DM |
2407 | |
2408 | /* recursively scan a stash and any nested stashes looking for entries | |
2409 | * that need the "only used once" warning raised | |
2410 | */ | |
2411 | ||
79072805 | 2412 | void |
51da40ed | 2413 | Perl_gv_check(pTHX_ HV *stash) |
79072805 | 2414 | { |
eb578fdb | 2415 | I32 i; |
463ee0b2 | 2416 | |
7918f24d NC |
2417 | PERL_ARGS_ASSERT_GV_CHECK; |
2418 | ||
8990e307 LW |
2419 | if (!HvARRAY(stash)) |
2420 | return; | |
90754377 DM |
2421 | |
2422 | assert(SvOOK(stash)); | |
90754377 | 2423 | |
a0d0e21e | 2424 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 2425 | const HE *entry; |
90754377 | 2426 | /* mark stash is being scanned, to avoid recursing */ |
339441ef | 2427 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_SCAN_STASH; |
dc437b57 | 2428 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
eb578fdb | 2429 | GV *gv; |
b7787f18 | 2430 | HV *hv; |
dc437b57 | 2431 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
159b6efe | 2432 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 2433 | { |
90754377 DM |
2434 | if (hv != PL_defstash && hv != stash |
2435 | && !(SvOOK(hv) | |
2436 | && (HvAUX(hv)->xhv_aux_flags & HvAUXf_SCAN_STASH)) | |
2437 | ) | |
a0d0e21e LW |
2438 | gv_check(hv); /* nested package */ |
2439 | } | |
ecad31f0 BF |
2440 | else if ( *HeKEY(entry) != '_' |
2441 | && isIDFIRST_lazy_if(HeKEY(entry), HeUTF8(entry)) ) { | |
e1ec3a88 | 2442 | const char *file; |
159b6efe | 2443 | gv = MUTABLE_GV(HeVAL(entry)); |
55d729e4 | 2444 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 2445 | continue; |
1d7c1841 | 2446 | file = GvFILE(gv); |
1d7c1841 | 2447 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1dc74fdb FC |
2448 | #ifdef USE_ITHREADS |
2449 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ | |
2450 | #else | |
2451 | CopFILEGV(PL_curcop) | |
2452 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
2453 | #endif | |
9014280d | 2454 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
d0c0e7dd FC |
2455 | "Name \"%"HEKf"::%"HEKf |
2456 | "\" used only once: possible typo", | |
2457 | HEKfARG(HvNAME_HEK(stash)), | |
2458 | HEKfARG(GvNAME_HEK(gv))); | |
463ee0b2 | 2459 | } |
79072805 | 2460 | } |
339441ef | 2461 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_SCAN_STASH; |
79072805 LW |
2462 | } |
2463 | } | |
2464 | ||
2465 | GV * | |
9cc50d5b | 2466 | Perl_newGVgen_flags(pTHX_ const char *pack, U32 flags) |
79072805 | 2467 | { |
9cc50d5b | 2468 | PERL_ARGS_ASSERT_NEWGVGEN_FLAGS; |
b17a0679 | 2469 | assert(!(flags & ~SVf_UTF8)); |
7918f24d | 2470 | |
b17a0679 FC |
2471 | return gv_fetchpv(Perl_form(aTHX_ "%"UTF8f"::_GEN_%ld", |
2472 | UTF8fARG(flags, strlen(pack), pack), | |
9cc50d5b BF |
2473 | (long)PL_gensym++), |
2474 | GV_ADD, SVt_PVGV); | |
79072805 LW |
2475 | } |
2476 | ||
2477 | /* hopefully this is only called on local symbol table entries */ | |
2478 | ||
2479 | GP* | |
864dbfa3 | 2480 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 2481 | { |
1d7c1841 | 2482 | if (!gp) |
d4c19fe8 | 2483 | return NULL; |
79072805 | 2484 | gp->gp_refcnt++; |
44a8e56a | 2485 | if (gp->gp_cv) { |
2486 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
2487 | /* If the GP they asked for a reference to contains |
2488 | a method cache entry, clear it first, so that we | |
2489 | don't infect them with our cached entry */ | |
e7881358 | 2490 | SvREFCNT_dec_NN(gp->gp_cv); |
601f1833 | 2491 | gp->gp_cv = NULL; |
44a8e56a | 2492 | gp->gp_cvgen = 0; |
2493 | } | |
44a8e56a | 2494 | } |
79072805 | 2495 | return gp; |
79072805 LW |
2496 | } |
2497 | ||
2498 | void | |
864dbfa3 | 2499 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 2500 | { |
79072805 | 2501 | GP* gp; |
b0d55c99 | 2502 | int attempts = 100; |
79072805 | 2503 | |
f7877b28 | 2504 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 2505 | return; |
f248d071 | 2506 | if (gp->gp_refcnt == 0) { |
9b387841 NC |
2507 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
2508 | "Attempt to free unreferenced glob pointers" | |
2509 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
2510 | return; |
2511 | } | |
4571f4a7 | 2512 | if (gp->gp_refcnt > 1) { |
bc81b34d | 2513 | borrowed: |
748a9306 LW |
2514 | if (gp->gp_egv == gv) |
2515 | gp->gp_egv = 0; | |
4571f4a7 | 2516 | gp->gp_refcnt--; |
c43ae56f | 2517 | GvGP_set(gv, NULL); |
79072805 | 2518 | return; |
748a9306 | 2519 | } |
79072805 | 2520 | |
b0d55c99 FC |
2521 | while (1) { |
2522 | /* Copy and null out all the glob slots, so destructors do not see | |
2523 | freed SVs. */ | |
2524 | HEK * const file_hek = gp->gp_file_hek; | |
2525 | SV * const sv = gp->gp_sv; | |
2526 | AV * const av = gp->gp_av; | |
2527 | HV * const hv = gp->gp_hv; | |
2528 | IO * const io = gp->gp_io; | |
2529 | CV * const cv = gp->gp_cv; | |
2530 | CV * const form = gp->gp_form; | |
2531 | ||
2532 | gp->gp_file_hek = NULL; | |
2533 | gp->gp_sv = NULL; | |
2534 | gp->gp_av = NULL; | |
2535 | gp->gp_hv = NULL; | |
2536 | gp->gp_io = NULL; | |
2537 | gp->gp_cv = NULL; | |
2538 | gp->gp_form = NULL; | |
2539 | ||
2540 | if (file_hek) | |
2541 | unshare_hek(file_hek); | |
2542 | ||
2543 | SvREFCNT_dec(sv); | |
2544 | SvREFCNT_dec(av); | |
2545 | /* FIXME - another reference loop GV -> symtab -> GV ? | |
2546 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
2547 | if (hv && SvTYPE(hv) == SVt_PVHV) { | |
c2242065 | 2548 | const HEK *hvname_hek = HvNAME_HEK(hv); |
923ed580 FC |
2549 | if (PL_stashcache && hvname_hek) { |
2550 | DEBUG_o(Perl_deb(aTHX_ | |
2551 | "gp_free clearing PL_stashcache for '%"HEKf"'\n", | |
2552 | HEKfARG(hvname_hek))); | |
0ca9877d | 2553 | (void)hv_deletehek(PL_stashcache, hvname_hek, G_DISCARD); |
923ed580 | 2554 | } |
b0d55c99 FC |
2555 | SvREFCNT_dec(hv); |
2556 | } | |
96d7c888 FC |
2557 | if (io && SvREFCNT(io) == 1 && IoIFP(io) |
2558 | && (IoTYPE(io) == IoTYPE_WRONLY || | |
2559 | IoTYPE(io) == IoTYPE_RDWR || | |
2560 | IoTYPE(io) == IoTYPE_APPEND) | |
2561 | && ckWARN_d(WARN_IO) | |
2562 | && IoIFP(io) != PerlIO_stdin() | |
2563 | && IoIFP(io) != PerlIO_stdout() | |
2564 | && IoIFP(io) != PerlIO_stderr() | |
2565 | && !(IoFLAGS(io) & IOf_FAKE_DIRP)) | |
2566 | io_close(io, gv, FALSE, TRUE); | |
b0d55c99 FC |
2567 | SvREFCNT_dec(io); |
2568 | SvREFCNT_dec(cv); | |
2569 | SvREFCNT_dec(form); | |
2570 | ||
bc81b34d FC |
2571 | /* Possibly reallocated by a destructor */ |
2572 | gp = GvGP(gv); | |
2573 | ||
b0d55c99 FC |
2574 | if (!gp->gp_file_hek |
2575 | && !gp->gp_sv | |
2576 | && !gp->gp_av | |
2577 | && !gp->gp_hv | |
2578 | && !gp->gp_io | |
2579 | && !gp->gp_cv | |
2580 | && !gp->gp_form) break; | |
2581 | ||
2582 | if (--attempts == 0) { | |
2583 | Perl_die(aTHX_ | |
2584 | "panic: gp_free failed to free glob pointer - " | |
2585 | "something is repeatedly re-creating entries" | |
2586 | ); | |
2587 | } | |
13207a71 | 2588 | } |
748a9306 | 2589 | |
bc81b34d FC |
2590 | /* Possibly incremented by a destructor doing glob assignment */ |
2591 | if (gp->gp_refcnt > 1) goto borrowed; | |
79072805 | 2592 | Safefree(gp); |
c43ae56f | 2593 | GvGP_set(gv, NULL); |
79072805 LW |
2594 | } |
2595 | ||
d460ef45 NIS |
2596 | int |
2597 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
2598 | { | |
53c1dcc0 AL |
2599 | AMT * const amtp = (AMT*)mg->mg_ptr; |
2600 | PERL_UNUSED_ARG(sv); | |
dd374669 | 2601 | |
7918f24d NC |
2602 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
2603 | ||
d460ef45 NIS |
2604 | if (amtp && AMT_AMAGIC(amtp)) { |
2605 | int i; | |
2606 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 2607 | CV * const cv = amtp->table[i]; |
b37c2d43 | 2608 | if (cv) { |
e7881358 | 2609 | SvREFCNT_dec_NN(MUTABLE_SV(cv)); |
601f1833 | 2610 | amtp->table[i] = NULL; |
d460ef45 NIS |
2611 | } |
2612 | } | |
2613 | } | |
2614 | return 0; | |
2615 | } | |
2616 | ||
a0d0e21e | 2617 | /* Updates and caches the CV's */ |
c3a9a790 RGS |
2618 | /* Returns: |
2619 | * 1 on success and there is some overload | |
2620 | * 0 if there is no overload | |
2621 | * -1 if some error occurred and it couldn't croak | |
2622 | */ | |
a0d0e21e | 2623 | |
c3a9a790 | 2624 | int |
242f8760 | 2625 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e | 2626 | { |
ad64d0ec | 2627 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 | 2628 | AMT amt; |
9b439311 | 2629 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 2630 | U32 newgen; |
a0d0e21e | 2631 | |
7918f24d NC |
2632 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
2633 | ||
9b439311 | 2634 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
2635 | if (mg) { |
2636 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
66978156 | 2637 | if (amtp->was_ok_sub == newgen) { |
8c34e50d | 2638 | return AMT_AMAGIC(amtp) ? 1 : 0; |
14899595 | 2639 | } |
ad64d0ec | 2640 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 | 2641 | } |
a0d0e21e | 2642 | |
bfcb3514 | 2643 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 2644 | |
d460ef45 | 2645 | Zero(&amt,1,AMT); |
e1a479c5 | 2646 | amt.was_ok_sub = newgen; |
a6006777 | 2647 | amt.fallback = AMGfallNO; |
2648 | amt.flags = 0; | |
2649 | ||
a6006777 | 2650 | { |
8c34e50d FC |
2651 | int filled = 0; |
2652 | int i; | |
3d147ac2 DM |
2653 | bool deref_seen = 0; |
2654 | ||
a6006777 | 2655 | |
3866ea3b | 2656 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 2657 | |
89ffc314 | 2658 | /* Try to find via inheritance. */ |
e6919483 | 2659 | GV *gv = gv_fetchmeth_pvn(stash, PL_AMG_names[0], 2, -1, 0); |
3866ea3b | 2660 | SV * const sv = gv ? GvSV(gv) : NULL; |
53c1dcc0 | 2661 | CV* cv; |
89ffc314 IZ |
2662 | |
2663 | if (!gv) | |
3866ea3b FC |
2664 | { |
2665 | if (!gv_fetchmeth_pvn(stash, "((", 2, -1, 0)) | |
8c34e50d | 2666 | goto no_table; |
3866ea3b FC |
2667 | } |
2668 | #ifdef PERL_DONT_CREATE_GVSV | |
2669 | else if (!sv) { | |
6f207bd3 | 2670 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
3866ea3b FC |
2671 | } |
2672 | #endif | |
79c9643d JL |
2673 | else if (SvTRUE(sv)) |
2674 | /* don't need to set overloading here because fallback => 1 | |
2675 | * is the default setting for classes without overloading */ | |
89ffc314 | 2676 | amt.fallback=AMGfallYES; |
79c9643d JL |
2677 | else if (SvOK(sv)) { |
2678 | amt.fallback=AMGfallNEVER; | |
386a5489 | 2679 | filled = 1; |
386a5489 | 2680 | } |
79c9643d | 2681 | else { |
386a5489 | 2682 | filled = 1; |
386a5489 | 2683 | } |
a6006777 | 2684 | |
3d147ac2 | 2685 | assert(SvOOK(stash)); |
3d147ac2 | 2686 | /* initially assume the worst */ |
339441ef | 2687 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_NO_DEREF; |
3d147ac2 | 2688 | |
8c34e50d | 2689 | for (i = 1; i < NofAMmeth; i++) { |
6136c704 | 2690 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 2691 | /* Human-readable form, for debugging: */ |
8c34e50d | 2692 | const char * const cp = AMG_id2name(i); |
d279ab82 | 2693 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 | 2694 | |
a0288114 | 2695 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 2696 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
2697 | /* don't fill the cache while looking up! |
2698 | Creation of inheritance stubs in intermediate packages may | |
2699 | conflict with the logic of runtime method substitution. | |
2700 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
2701 | then we could have created stubs for "(+0" in A and C too. | |
2702 | But if B overloads "bool", we may want to use it for | |
2703 | numifying instead of C's "+0". */ | |
8c34e50d | 2704 | gv = Perl_gv_fetchmeth_pvn(aTHX_ stash, cooky, l, -1, 0); |
46fc3d4c | 2705 | cv = 0; |
c3ad4e54 FC |
2706 | if (gv && (cv = GvCV(gv)) && CvHASGV(cv)) { |
2707 | const HEK * const gvhek = | |
2708 | CvNAMED(cv) ? CvNAME_HEK(cv) : GvNAME_HEK(CvGV(cv)); | |
2709 | const HEK * const stashek = | |
2710 | HvNAME_HEK(CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv))); | |
2711 | if (HEK_LEN(gvhek) == 3 && strEQ(HEK_KEY(gvhek), "nil") | |
2712 | && stashek && HEK_LEN(stashek) == 8 | |
2713 | && strEQ(HEK_KEY(stashek), "overload")) { | |
611c1e95 IZ |
2714 | /* This is a hack to support autoloading..., while |
2715 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 2716 | /* GvSV contains the name of the method. */ |
6136c704 | 2717 | GV *ngv = NULL; |
c69033f2 | 2718 | SV *gvsv = GvSV(gv); |
a0288114 AL |
2719 | |
2720 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
2721 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
f0e9f182 | 2722 | (void*)GvSV(gv), cp, HvNAME(stash)) ); |
c69033f2 | 2723 | if (!gvsv || !SvPOK(gvsv) |
7f415459 | 2724 | || !(ngv = gv_fetchmethod_sv_flags(stash, gvsv, 0))) |
dc848c6f | 2725 | { |
a0288114 | 2726 | /* Can be an import stub (created by "can"). */ |
242f8760 | 2727 | if (destructing) { |
c3a9a790 | 2728 | return -1; |
242f8760 RGS |
2729 | } |
2730 | else { | |
d66cca07 BF |
2731 | const SV * const name = (gvsv && SvPOK(gvsv)) |
2732 | ? gvsv | |
2733 | : newSVpvs_flags("???", SVs_TEMP); | |
dcbac5bb | 2734 | /* diag_listed_as: Can't resolve method "%s" overloading "%s" in package "%s" */ |
d66cca07 BF |
2735 | Perl_croak(aTHX_ "%s method \"%"SVf256 |
2736 | "\" overloading \"%s\" "\ | |
d0c0e7dd | 2737 | "in package \"%"HEKf256"\"", |
242f8760 RGS |
2738 | (GvCVGEN(gv) ? "Stub found while resolving" |
2739 | : "Can't resolve"), | |
d66cca07 | 2740 | SVfARG(name), cp, |
d0c0e7dd | 2741 | HEKfARG( |
d66cca07 | 2742 | HvNAME_HEK(stash) |
d0c0e7dd | 2743 | )); |
242f8760 | 2744 | } |
44a8e56a | 2745 | } |
dc848c6f | 2746 | cv = GvCV(gv = ngv); |
44a8e56a | 2747 | } |
b464bac0 | 2748 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 2749 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 2750 | GvNAME(CvGV(cv))) ); |
2751 | filled = 1; | |
611c1e95 | 2752 | } else if (gv) { /* Autoloaded... */ |
ea726b52 | 2753 | cv = MUTABLE_CV(gv); |
611c1e95 | 2754 | filled = 1; |
44a8e56a | 2755 | } |
ea726b52 | 2756 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); |
3d147ac2 DM |
2757 | |
2758 | if (gv) { | |
2759 | switch (i) { | |
2760 | case to_sv_amg: | |
2761 | case to_av_amg: | |
2762 | case to_hv_amg: | |
2763 | case to_gv_amg: | |
2764 | case to_cv_amg: | |
2765 | case nomethod_amg: | |
2766 | deref_seen = 1; | |
2767 | break; | |
2768 | } | |
2769 | } | |
a0d0e21e | 2770 | } |
3d147ac2 | 2771 | if (!deref_seen) |
45479970 DM |
2772 | /* none of @{} etc overloaded; we can do $obj->[N] quicker. |
2773 | * NB - aux var invalid here, HvARRAY() could have been | |
2774 | * reallocated since it was assigned to */ | |
2775 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_NO_DEREF; | |
3d147ac2 | 2776 | |
a0d0e21e | 2777 | if (filled) { |
a6006777 | 2778 | AMT_AMAGIC_on(&amt); |
ad64d0ec | 2779 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2780 | (char*)&amt, sizeof(AMT)); |
8c34e50d | 2781 | return TRUE; |
a0d0e21e LW |
2782 | } |
2783 | } | |
a6006777 | 2784 | /* Here we have no table: */ |
8c34e50d | 2785 | no_table: |
a6006777 | 2786 | AMT_AMAGIC_off(&amt); |
ad64d0ec | 2787 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2788 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 | 2789 | return 0; |
a0d0e21e LW |
2790 | } |
2791 | ||
32251b26 IZ |
2792 | |
2793 | CV* | |
2794 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
2795 | { | |
3f8f4626 | 2796 | MAGIC *mg; |
32251b26 | 2797 | AMT *amtp; |
e1a479c5 | 2798 | U32 newgen; |
9b439311 | 2799 | struct mro_meta* stash_meta; |
32251b26 | 2800 | |
bfcb3514 | 2801 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 2802 | return NULL; |
e1a479c5 | 2803 | |
9b439311 BB |
2804 | stash_meta = HvMROMETA(stash); |
2805 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 2806 | |
ad64d0ec | 2807 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
2808 | if (!mg) { |
2809 | do_update: | |
8c34e50d | 2810 | if (Gv_AMupdate(stash, 0) == -1) |
242f8760 | 2811 | return NULL; |
ad64d0ec | 2812 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 | 2813 | } |
a9fd4e40 | 2814 | assert(mg); |
32251b26 | 2815 | amtp = (AMT*)mg->mg_ptr; |
66978156 | 2816 | if ( amtp->was_ok_sub != newgen ) |
32251b26 | 2817 | goto do_update; |
3ad83ce7 | 2818 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 2819 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
2820 | if (ret && isGV(ret)) { /* Autoloading stab */ |
2821 | /* Passing it through may have resulted in a warning | |
2822 | "Inherited AUTOLOAD for a non-method deprecated", since | |
2823 | our caller is going through a function call, not a method call. | |
2824 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 2825 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
2826 | |
2827 | if (gv && GvCV(gv)) | |
2828 | return GvCV(gv); | |
2829 | } | |
2830 | return ret; | |
2831 | } | |
a0288114 | 2832 | |
601f1833 | 2833 | return NULL; |
32251b26 IZ |
2834 | } |
2835 | ||
2836 | ||
6f1401dc DM |
2837 | /* Implement tryAMAGICun_MG macro. |
2838 | Do get magic, then see if the stack arg is overloaded and if so call it. | |
2839 | Flags: | |
2840 | AMGf_set return the arg using SETs rather than assigning to | |
2841 | the targ | |
2842 | AMGf_numeric apply sv_2num to the stack arg. | |
2843 | */ | |
2844 | ||
2845 | bool | |
2846 | Perl_try_amagic_un(pTHX_ int method, int flags) { | |
6f1401dc DM |
2847 | dSP; |
2848 | SV* tmpsv; | |
2849 | SV* const arg = TOPs; | |
2850 | ||
2851 | SvGETMAGIC(arg); | |
2852 | ||
9f8bf298 | 2853 | if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method, |
636ac8fc FC |
2854 | AMGf_noright | AMGf_unary |
2855 | | (flags & AMGf_numarg)))) | |
2856 | { | |
6f1401dc DM |
2857 | if (flags & AMGf_set) { |
2858 | SETs(tmpsv); | |
2859 | } | |
2860 | else { | |
2861 | dTARGET; | |
2862 | if (SvPADMY(TARG)) { | |
2863 | sv_setsv(TARG, tmpsv); | |
2864 | SETTARG; | |
2865 | } | |
2866 | else | |
2867 | SETs(tmpsv); | |
2868 | } | |
2869 | PUTBACK; | |
2870 | return TRUE; | |
2871 | } | |
2872 | ||
2873 | if ((flags & AMGf_numeric) && SvROK(arg)) | |
2874 | *sp = sv_2num(arg); | |
2875 | return FALSE; | |
2876 | } | |
2877 | ||
2878 | ||
2879 | /* Implement tryAMAGICbin_MG macro. | |
2880 | Do get magic, then see if the two stack args are overloaded and if so | |
2881 | call it. | |
2882 | Flags: | |
2883 | AMGf_set return the arg using SETs rather than assigning to | |
2884 | the targ | |
2885 | AMGf_assign op may be called as mutator (eg +=) | |
2886 | AMGf_numeric apply sv_2num to the stack arg. | |
2887 | */ | |
2888 | ||
2889 | bool | |
2890 | Perl_try_amagic_bin(pTHX_ int method, int flags) { | |
6f1401dc DM |
2891 | dSP; |
2892 | SV* const left = TOPm1s; | |
2893 | SV* const right = TOPs; | |
2894 | ||
2895 | SvGETMAGIC(left); | |
2896 | if (left != right) | |
2897 | SvGETMAGIC(right); | |
2898 | ||
2899 | if (SvAMAGIC(left) || SvAMAGIC(right)) { | |
2900 | SV * const tmpsv = amagic_call(left, right, method, | |
636ac8fc FC |
2901 | ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0) |
2902 | | (flags & AMGf_numarg)); | |
6f1401dc DM |
2903 | if (tmpsv) { |
2904 | if (flags & AMGf_set) { | |
2905 | (void)POPs; | |
2906 | SETs(tmpsv); | |
2907 | } | |
2908 | else { | |
2909 | dATARGET; | |
2910 | (void)POPs; | |
2911 | if (opASSIGN || SvPADMY(TARG)) { | |
2912 | sv_setsv(TARG, tmpsv); | |
2913 | SETTARG; | |
2914 | } | |
2915 | else | |
2916 | SETs(tmpsv); | |
2917 | } | |
2918 | PUTBACK; | |
2919 | return TRUE; | |
2920 | } | |
2921 | } | |
75ea7a12 FC |
2922 | if(left==right && SvGMAGICAL(left)) { |
2923 | SV * const left = sv_newmortal(); | |
2924 | *(sp-1) = left; | |
2925 | /* Print the uninitialized warning now, so it includes the vari- | |
2926 | able name. */ | |
2927 | if (!SvOK(right)) { | |
2928 | if (ckWARN(WARN_UNINITIALIZED)) report_uninit(right); | |
2929 | sv_setsv_flags(left, &PL_sv_no, 0); | |
2930 | } | |
2931 | else sv_setsv_flags(left, right, 0); | |
2932 | SvGETMAGIC(right); | |
2933 | } | |
6f1401dc | 2934 | if (flags & AMGf_numeric) { |
75ea7a12 FC |
2935 | if (SvROK(TOPm1s)) |
2936 | *(sp-1) = sv_2num(TOPm1s); | |
6f1401dc DM |
2937 | if (SvROK(right)) |
2938 | *sp = sv_2num(right); | |
2939 | } | |
2940 | return FALSE; | |
2941 | } | |
2942 | ||
25a9ffce NC |
2943 | SV * |
2944 | Perl_amagic_deref_call(pTHX_ SV *ref, int method) { | |
2945 | SV *tmpsv = NULL; | |
3d147ac2 | 2946 | HV *stash; |
25a9ffce NC |
2947 | |
2948 | PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL; | |
2949 | ||
3d147ac2 DM |
2950 | if (!SvAMAGIC(ref)) |
2951 | return ref; | |
2952 | /* return quickly if none of the deref ops are overloaded */ | |
2953 | stash = SvSTASH(SvRV(ref)); | |
2954 | assert(SvOOK(stash)); | |
2955 | if (HvAUX(stash)->xhv_aux_flags & HvAUXf_NO_DEREF) | |
2956 | return ref; | |
2957 | ||
2958 | while ((tmpsv = amagic_call(ref, &PL_sv_undef, method, | |
25a9ffce NC |
2959 | AMGf_noright | AMGf_unary))) { |
2960 | if (!SvROK(tmpsv)) | |
2961 | Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); | |
2962 | if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) { | |
2963 | /* Bail out if it returns us the same reference. */ | |
2964 | return tmpsv; | |
2965 | } | |
2966 | ref = tmpsv; | |
3d147ac2 DM |
2967 | if (!SvAMAGIC(ref)) |
2968 | break; | |
25a9ffce NC |
2969 | } |
2970 | return tmpsv ? tmpsv : ref; | |
2971 | } | |
6f1401dc | 2972 | |
8d569291 FC |
2973 | bool |
2974 | Perl_amagic_is_enabled(pTHX_ int method) | |
2975 | { | |
2976 | SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0); | |
2977 | ||
2978 | assert(PL_curcop->cop_hints & HINT_NO_AMAGIC); | |
2979 | ||
2980 | if ( !lex_mask || !SvOK(lex_mask) ) | |
2981 | /* overloading lexically disabled */ | |
2982 | return FALSE; | |
2983 | else if ( lex_mask && SvPOK(lex_mask) ) { | |
2984 | /* we have an entry in the hints hash, check if method has been | |
2985 | * masked by overloading.pm */ | |
2986 | STRLEN len; | |
2987 | const int offset = method / 8; | |
2988 | const int bit = method % 8; | |
2989 | char *pv = SvPV(lex_mask, len); | |
2990 | ||
2991 | /* Bit set, so this overloading operator is disabled */ | |
2992 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) | |
2993 | return FALSE; | |
2994 | } | |
2995 | return TRUE; | |
2996 | } | |
2997 | ||
a0d0e21e | 2998 | SV* |
864dbfa3 | 2999 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 3000 | { |
27da23d5 | 3001 | dVAR; |
b267980d | 3002 | MAGIC *mg; |
9c5ffd7c | 3003 | CV *cv=NULL; |
a0d0e21e | 3004 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 3005 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
3006 | int off = 0, off1, lr = 0, notfound = 0; |
3007 | int postpr = 0, force_cpy = 0; | |
3008 | int assign = AMGf_assign & flags; | |
3009 | const int assignshift = assign ? 1 : 0; | |
bf5522a1 | 3010 | int use_default_op = 0; |
67288365 | 3011 | int force_scalar = 0; |
497b47a8 JH |
3012 | #ifdef DEBUGGING |
3013 | int fl=0; | |
497b47a8 | 3014 | #endif |
25716404 | 3015 | HV* stash=NULL; |
7918f24d NC |
3016 | |
3017 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
3018 | ||
e46c382e | 3019 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
8d569291 | 3020 | if (!amagic_is_enabled(method)) return NULL; |
e46c382e YK |
3021 | } |
3022 | ||
a0d0e21e | 3023 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
0a2c84ab | 3024 | && (stash = SvSTASH(SvRV(left))) && Gv_AMG(stash) |
ad64d0ec | 3025 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 3026 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 3027 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 3028 | : NULL)) |
b267980d | 3029 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
3030 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
3031 | * usual method */ | |
497b47a8 JH |
3032 | ( |
3033 | #ifdef DEBUGGING | |
3034 | fl = 1, | |
a0288114 | 3035 | #endif |
497b47a8 | 3036 | cv = cvp[off=method])))) { |
a0d0e21e LW |
3037 | lr = -1; /* Call method for left argument */ |
3038 | } else { | |
3039 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
3040 | int logic; | |
3041 | ||
3042 | /* look for substituted methods */ | |
ee239bfe | 3043 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
3044 | switch (method) { |
3045 | case inc_amg: | |
ee239bfe IZ |
3046 | force_cpy = 1; |
3047 | if ((cv = cvp[off=add_ass_amg]) | |
3048 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 3049 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
3050 | } |
3051 | break; | |
3052 | case dec_amg: | |
ee239bfe IZ |
3053 | force_cpy = 1; |
3054 | if ((cv = cvp[off = subtr_ass_amg]) | |
3055 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 3056 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
3057 | } |
3058 | break; | |
3059 | case bool__amg: | |
3060 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
3061 | break; | |
3062 | case numer_amg: | |
3063 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
3064 | break; | |
3065 | case string_amg: | |
3066 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
3067 | break; | |
b7787f18 AL |
3068 | case not_amg: |
3069 | (void)((cv = cvp[off=bool__amg]) | |
3070 | || (cv = cvp[off=numer_amg]) | |
3071 | || (cv = cvp[off=string_amg])); | |
2ab54efd MB |
3072 | if (cv) |
3073 | postpr = 1; | |
b7787f18 | 3074 | break; |
748a9306 LW |
3075 | case copy_amg: |
3076 | { | |
76e3520e GS |
3077 | /* |
3078 | * SV* ref causes confusion with the interpreter variable of | |
3079 | * the same name | |
3080 | */ | |
890ce7af | 3081 | SV* const tmpRef=SvRV(left); |
76e3520e | 3082 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 3083 | /* |
3084 | * Just to be extra cautious. Maybe in some | |
3085 | * additional cases sv_setsv is safe, too. | |
3086 | */ | |
890ce7af | 3087 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 3088 | SvOBJECT_on(newref); |
a1cd65be FC |
3089 | /* No need to do SvAMAGIC_on here, as SvAMAGIC macros |
3090 | delegate to the stash. */ | |
85fbaab2 | 3091 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); |
748a9306 LW |
3092 | return newref; |
3093 | } | |
3094 | } | |
3095 | break; | |
a0d0e21e | 3096 | case abs_amg: |
b267980d | 3097 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 3098 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 3099 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 3100 | if (off1==lt_amg) { |
890ce7af | 3101 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
3102 | lt_amg,AMGf_noright); |
3103 | logic = SvTRUE(lessp); | |
3104 | } else { | |
890ce7af | 3105 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
3106 | ncmp_amg,AMGf_noright); |
3107 | logic = (SvNV(lessp) < 0); | |
3108 | } | |
3109 | if (logic) { | |
3110 | if (off==subtr_amg) { | |
3111 | right = left; | |
748a9306 | 3112 | left = nullsv; |
a0d0e21e LW |
3113 | lr = 1; |
3114 | } | |
3115 | } else { | |
3116 | return left; | |
3117 | } | |
3118 | } | |
3119 | break; | |
3120 | case neg_amg: | |
155aba94 | 3121 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
3122 | right = left; |
3123 | left = sv_2mortal(newSViv(0)); | |
3124 | lr = 1; | |
3125 | } | |
3126 | break; | |
f216259d | 3127 | case int_amg: |
f5284f61 | 3128 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
c4c7412c | 3129 | case ftest_amg: /* XXXX Eventually should do to_gv. */ |
d4b87e75 | 3130 | case regexp_amg: |
b267980d NIS |
3131 | /* FAIL safe */ |
3132 | return NULL; /* Delegate operation to standard mechanisms. */ | |
81d52ecd | 3133 | |
f5284f61 IZ |
3134 | case to_sv_amg: |
3135 | case to_av_amg: | |
3136 | case to_hv_amg: | |
3137 | case to_gv_amg: | |
3138 | case to_cv_amg: | |
3139 | /* FAIL safe */ | |
b267980d | 3140 | return left; /* Delegate operation to standard mechanisms. */ |
81d52ecd | 3141 | |
a0d0e21e LW |
3142 | default: |
3143 | goto not_found; | |
3144 | } | |
3145 | if (!cv) goto not_found; | |
3146 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
0a2c84ab | 3147 | && (stash = SvSTASH(SvRV(right))) && Gv_AMG(stash) |
ad64d0ec | 3148 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 3149 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 3150 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 3151 | : NULL)) |
69815d08 RS |
3152 | && (cv = cvp[off=method])) { /* Method for right |
3153 | * argument found */ | |
3154 | lr=1; | |
bf5522a1 MB |
3155 | } else if (((cvp && amtp->fallback > AMGfallNEVER) |
3156 | || (ocvp && oamtp->fallback > AMGfallNEVER)) | |
a0d0e21e LW |
3157 | && !(flags & AMGf_unary)) { |
3158 | /* We look for substitution for | |
3159 | * comparison operations and | |
fc36a67e | 3160 | * concatenation */ |
a0d0e21e LW |
3161 | if (method==concat_amg || method==concat_ass_amg |
3162 | || method==repeat_amg || method==repeat_ass_amg) { | |
3163 | return NULL; /* Delegate operation to string conversion */ | |
3164 | } | |
3165 | off = -1; | |
3166 | switch (method) { | |
3167 | case lt_amg: | |
3168 | case le_amg: | |
3169 | case gt_amg: | |
3170 | case ge_amg: | |
3171 | case eq_amg: | |
3172 | case ne_amg: | |
2ab54efd MB |
3173 | off = ncmp_amg; |
3174 | break; | |
a0d0e21e LW |
3175 | case slt_amg: |
3176 | case sle_amg: | |
3177 | case sgt_amg: | |
3178 | case sge_amg: | |
3179 | case seq_amg: | |
3180 | case sne_amg: | |
2ab54efd MB |
3181 | off = scmp_amg; |
3182 | break; | |
a0d0e21e | 3183 | } |
bf5522a1 MB |
3184 | if (off != -1) { |
3185 | if (ocvp && (oamtp->fallback > AMGfallNEVER)) { | |
3186 | cv = ocvp[off]; | |
3187 | lr = -1; | |
3188 | } | |
3189 | if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) { | |
3190 | cv = cvp[off]; | |
3191 | lr = 1; | |
3192 | } | |
3193 | } | |
3194 | if (cv) | |
2ab54efd MB |
3195 | postpr = 1; |
3196 | else | |
3197 | goto not_found; | |
a0d0e21e | 3198 | } else { |
a6006777 | 3199 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
3200 | switch (method) { |
3201 | case to_sv_amg: | |
3202 | case to_av_amg: | |
3203 | case to_hv_amg: | |
3204 | case to_gv_amg: | |
3205 | case to_cv_amg: | |
3206 | /* FAIL safe */ | |
3207 | return left; /* Delegate operation to standard mechanisms. */ | |
b267980d | 3208 | } |
a0d0e21e LW |
3209 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
3210 | notfound = 1; lr = -1; | |
3211 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
3212 | notfound = 1; lr = 1; | |
bf5522a1 MB |
3213 | } else if ((use_default_op = |
3214 | (!ocvp || oamtp->fallback >= AMGfallYES) | |
3215 | && (!cvp || amtp->fallback >= AMGfallYES)) | |
3216 | && !DEBUG_o_TEST) { | |
4cc0ca18 NC |
3217 | /* Skip generating the "no method found" message. */ |
3218 | return NULL; | |
a0d0e21e | 3219 | } else { |
46fc3d4c | 3220 | SV *msg; |
774d564b | 3221 | if (off==-1) off=method; |
b267980d | 3222 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
d66cca07 BF |
3223 | "Operation \"%s\": no method found,%sargument %s%"SVf"%s%"SVf, |
3224 | AMG_id2name(method + assignshift), | |
3225 | (flags & AMGf_unary ? " " : "\n\tleft "), | |
3226 | SvAMAGIC(left)? | |
3227 | "in overloaded package ": | |
3228 | "has no overloaded magic", | |
3229 | SvAMAGIC(left)? | |
3230 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(left)))))): | |
3231 | SVfARG(&PL_sv_no), | |
3232 | SvAMAGIC(right)? | |
3233 | ",\n\tright argument in overloaded package ": | |
3234 | (flags & AMGf_unary | |
3235 | ? "" | |
3236 | : ",\n\tright argument has no overloaded magic"), | |
3237 | SvAMAGIC(right)? | |
3238 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(right)))))): | |
3239 | SVfARG(&PL_sv_no))); | |
bf5522a1 | 3240 | if (use_default_op) { |
d66cca07 | 3241 | DEBUG_o( Perl_deb(aTHX_ "%"SVf, SVfARG(msg)) ); |
a0d0e21e | 3242 | } else { |
be2597df | 3243 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e LW |
3244 | } |
3245 | return NULL; | |
3246 | } | |
ee239bfe | 3247 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
3248 | } |
3249 | } | |
67288365 JL |
3250 | |
3251 | switch (method) { | |
3252 | /* in these cases, we're calling '+' or '-' as a fallback for a ++ or -- | |
3253 | * operation. we need this to return a value, so that it can be assigned | |
3254 | * later on, in the postpr block (case inc_amg/dec_amg), even if the | |
3255 | * increment or decrement was itself called in void context */ | |
3256 | case inc_amg: | |
3257 | if (off == add_amg) | |
3258 | force_scalar = 1; | |
3259 | break; | |
3260 | case dec_amg: | |
3261 | if (off == subtr_amg) | |
3262 | force_scalar = 1; | |
3263 | break; | |
3264 | /* in these cases, we're calling an assignment variant of an operator | |
3265 | * (+= rather than +, for instance). regardless of whether it's a | |
3266 | * fallback or not, it always has to return a value, which will be | |
3267 | * assigned to the proper variable later */ | |
3268 | case add_amg: | |
3269 | case subtr_amg: | |
3270 | case mult_amg: | |
3271 | case div_amg: | |
3272 | case modulo_amg: | |
3273 | case pow_amg: | |
3274 | case lshift_amg: | |
3275 | case rshift_amg: | |
3276 | case repeat_amg: | |
3277 | case concat_amg: | |
3278 | case band_amg: | |
3279 | case bor_amg: | |
3280 | case bxor_amg: | |
6d06ecce FC |
3281 | case sband_amg: |
3282 | case sbor_amg: | |
3283 | case sbxor_amg: | |
67288365 JL |
3284 | if (assign) |
3285 | force_scalar = 1; | |
3286 | break; | |
3287 | /* the copy constructor always needs to return a value */ | |
3288 | case copy_amg: | |
3289 | force_scalar = 1; | |
3290 | break; | |
3291 | /* because of the way these are implemented (they don't perform the | |
3292 | * dereferencing themselves, they return a reference that perl then | |
3293 | * dereferences later), they always have to be in scalar context */ | |
3294 | case to_sv_amg: | |
3295 | case to_av_amg: | |
3296 | case to_hv_amg: | |
3297 | case to_gv_amg: | |
3298 | case to_cv_amg: | |
3299 | force_scalar = 1; | |
3300 | break; | |
3301 | /* these don't have an op of their own; they're triggered by their parent | |
3302 | * op, so the context there isn't meaningful ('$a and foo()' in void | |
3303 | * context still needs to pass scalar context on to $a's bool overload) */ | |
3304 | case bool__amg: | |
3305 | case numer_amg: | |
3306 | case string_amg: | |
3307 | force_scalar = 1; | |
3308 | break; | |
3309 | } | |
3310 | ||
497b47a8 | 3311 | #ifdef DEBUGGING |
a0d0e21e | 3312 | if (!notfound) { |
497b47a8 | 3313 | DEBUG_o(Perl_deb(aTHX_ |
d66cca07 | 3314 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %"SVf"%s\n", |
497b47a8 JH |
3315 | AMG_id2name(off), |
3316 | method+assignshift==off? "" : | |
a0288114 | 3317 | " (initially \"", |
497b47a8 JH |
3318 | method+assignshift==off? "" : |
3319 | AMG_id2name(method+assignshift), | |
a0288114 | 3320 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
3321 | flags & AMGf_unary? "" : |
3322 | lr==1 ? " for right argument": " for left argument", | |
3323 | flags & AMGf_unary? " for argument" : "", | |
d66cca07 | 3324 | stash ? SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(stash)))) : SVfARG(newSVpvs_flags("null", SVs_TEMP)), |
497b47a8 | 3325 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 3326 | } |
497b47a8 | 3327 | #endif |
748a9306 LW |
3328 | /* Since we use shallow copy during assignment, we need |
3329 | * to dublicate the contents, probably calling user-supplied | |
3330 | * version of copy operator | |
3331 | */ | |
ee239bfe IZ |
3332 | /* We need to copy in following cases: |
3333 | * a) Assignment form was called. | |
3334 | * assignshift==1, assign==T, method + 1 == off | |
3335 | * b) Increment or decrement, called directly. | |
3336 | * assignshift==0, assign==0, method + 0 == off | |
3337 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 3338 | * assignshift==0, assign==T, |
ee239bfe IZ |
3339 | * force_cpy == T |
3340 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 3341 | * assignshift==0, assign==0, |
ee239bfe IZ |
3342 | * force_cpy == T |
3343 | * e) Assignment form translated to nomethod. | |
3344 | * assignshift==1, assign==T, method + 1 != off | |
3345 | * force_cpy == T | |
3346 | */ | |
3347 | /* off is method, method+assignshift, or a result of opcode substitution. | |
3348 | * In the latter case assignshift==0, so only notfound case is important. | |
3349 | */ | |
73512201 | 3350 | if ( (lr == -1) && ( ( (method + assignshift == off) |
ee239bfe | 3351 | && (assign || (method == inc_amg) || (method == dec_amg))) |
73512201 | 3352 | || force_cpy) ) |
6f1401dc | 3353 | { |
1b38c28e NC |
3354 | /* newSVsv does not behave as advertised, so we copy missing |
3355 | * information by hand */ | |
3356 | SV *tmpRef = SvRV(left); | |
3357 | SV *rv_copy; | |
31d632c3 | 3358 | if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) { |
1b38c28e NC |
3359 | SvRV_set(left, rv_copy); |
3360 | SvSETMAGIC(left); | |
e7881358 | 3361 | SvREFCNT_dec_NN(tmpRef); |
1b38c28e | 3362 | } |
6f1401dc DM |
3363 | } |
3364 | ||
a0d0e21e LW |
3365 | { |
3366 | dSP; | |
3367 | BINOP myop; | |
3368 | SV* res; | |
b7787f18 | 3369 | const bool oldcatch = CATCH_GET; |
67288365 JL |
3370 | I32 oldmark, nret; |
3371 | int gimme = force_scalar ? G_SCALAR : GIMME_V; | |
a0d0e21e | 3372 | |
54310121 | 3373 | CATCH_SET(TRUE); |
a0d0e21e LW |
3374 | Zero(&myop, 1, BINOP); |
3375 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 3376 | myop.op_next = NULL; |
67288365 JL |
3377 | myop.op_flags = OPf_STACKED; |
3378 | ||
3379 | switch (gimme) { | |
3380 | case G_VOID: | |
3381 | myop.op_flags |= OPf_WANT_VOID; | |
3382 | break; | |
3383 | case G_ARRAY: | |
3384 | if (flags & AMGf_want_list) { | |
3385 | myop.op_flags |= OPf_WANT_LIST; | |
3386 | break; | |
3387 | } | |
3388 | /* FALLTHROUGH */ | |
3389 | default: | |
3390 | myop.op_flags |= OPf_WANT_SCALAR; | |
3391 | break; | |
3392 | } | |
a0d0e21e | 3393 | |
e788e7d3 | 3394 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 3395 | ENTER; |
462e5cf6 | 3396 | SAVEOP(); |
533c011a | 3397 | PL_op = (OP *) &myop; |
3280af22 | 3398 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 3399 | PL_op->op_private |= OPpENTERSUB_DB; |
897d3989 | 3400 | Perl_pp_pushmark(aTHX); |
a0d0e21e | 3401 | |
924508f0 | 3402 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
3403 | PUSHs(lr>0? right: left); |
3404 | PUSHs(lr>0? left: right); | |
3280af22 | 3405 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 3406 | if (notfound) { |
59cd0e26 NC |
3407 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
3408 | AMG_id2namelen(method + assignshift), SVs_TEMP)); | |
a0d0e21e | 3409 | } |
636ac8fc FC |
3410 | else if (flags & AMGf_numarg) |
3411 | PUSHs(&PL_sv_undef); | |
3412 | if (flags & AMGf_numarg) | |
3413 | PUSHs(&PL_sv_yes); | |
ad64d0ec | 3414 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e | 3415 | PUTBACK; |
67288365 | 3416 | oldmark = TOPMARK; |
a0d0e21e | 3417 | |
139d0ce6 | 3418 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 | 3419 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
3420 | LEAVE; |
3421 | SPAGAIN; | |
67288365 JL |
3422 | nret = SP - (PL_stack_base + oldmark); |
3423 | ||
3424 | switch (gimme) { | |
3425 | case G_VOID: | |
3426 | /* returning NULL has another meaning, and we check the context | |
3427 | * at the call site too, so this can be differentiated from the | |
3428 | * scalar case */ | |
3429 | res = &PL_sv_undef; | |
3430 | SP = PL_stack_base + oldmark; | |
3431 | break; | |
3432 | case G_ARRAY: { | |
3433 | if (flags & AMGf_want_list) { | |
3434 | res = sv_2mortal((SV *)newAV()); | |
3435 | av_extend((AV *)res, nret); | |
3436 | while (nret--) | |
3437 | av_store((AV *)res, nret, POPs); | |
3438 | break; | |
3439 | } | |
3440 | /* FALLTHROUGH */ | |
3441 | } | |
3442 | default: | |
3443 | res = POPs; | |
3444 | break; | |
3445 | } | |
a0d0e21e | 3446 | |
ebafeae7 | 3447 | PUTBACK; |
d3acc0f7 | 3448 | POPSTACK; |
54310121 | 3449 | CATCH_SET(oldcatch); |
a0d0e21e | 3450 | |
a0d0e21e | 3451 | if (postpr) { |
b7787f18 | 3452 | int ans; |
a0d0e21e LW |
3453 | switch (method) { |
3454 | case le_amg: | |
3455 | case sle_amg: | |
3456 | ans=SvIV(res)<=0; break; | |
3457 | case lt_amg: | |
3458 | case slt_amg: | |
3459 | ans=SvIV(res)<0; break; | |
3460 | case ge_amg: | |
3461 | case sge_amg: | |
3462 | ans=SvIV(res)>=0; break; | |
3463 | case gt_amg: | |
3464 | case sgt_amg: | |
3465 | ans=SvIV(res)>0; break; | |
3466 | case eq_amg: | |
3467 | case seq_amg: | |
3468 | ans=SvIV(res)==0; break; | |
3469 | case ne_amg: | |
3470 | case sne_amg: | |
3471 | ans=SvIV(res)!=0; break; | |
3472 | case inc_amg: | |
3473 | case dec_amg: | |
bbce6d69 | 3474 | SvSetSV(left,res); return left; |
dc437b57 | 3475 | case not_amg: |
fe7ac86a | 3476 | ans=!SvTRUE(res); break; |
b7787f18 AL |
3477 | default: |
3478 | ans=0; break; | |
a0d0e21e | 3479 | } |
54310121 | 3480 | return boolSV(ans); |
748a9306 LW |
3481 | } else if (method==copy_amg) { |
3482 | if (!SvROK(res)) { | |
cea2e8a9 | 3483 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
3484 | } |
3485 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
3486 | } else { |
3487 | return res; | |
3488 | } | |
3489 | } | |
3490 | } | |
c9d5ac95 | 3491 | |
f5c1e807 NC |
3492 | void |
3493 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
3494 | { | |
3495 | dVAR; | |
acda4c6a | 3496 | U32 hash; |
f5c1e807 | 3497 | |
7918f24d | 3498 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 | 3499 | |
acda4c6a NC |
3500 | if (len > I32_MAX) |
3501 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); | |
3502 | ||
ae8cc45f NC |
3503 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
3504 | unshare_hek(GvNAME_HEK(gv)); | |
3505 | } | |
3506 | ||
acda4c6a | 3507 | PERL_HASH(hash, name, len); |
c60dbbc3 | 3508 | GvNAME_HEK(gv) = share_hek(name, (flags & SVf_UTF8 ? -(I32)len : (I32)len), hash); |
f5c1e807 NC |
3509 | } |
3510 | ||
66610fdd | 3511 | /* |
f7461760 Z |
3512 | =for apidoc gv_try_downgrade |
3513 | ||
2867cdbc Z |
3514 | If the typeglob C<gv> can be expressed more succinctly, by having |
3515 | something other than a real GV in its place in the stash, replace it | |
3516 | with the optimised form. Basic requirements for this are that C<gv> | |
3517 | is a real typeglob, is sufficiently ordinary, and is only referenced | |
3518 | from its package. This function is meant to be used when a GV has been | |
3519 | looked up in part to see what was there, causing upgrading, but based | |
3520 | on what was found it turns out that the real GV isn't required after all. | |
3521 | ||
3522 | If C<gv> is a completely empty typeglob, it is deleted from the stash. | |
3523 | ||
3524 | If C<gv> is a typeglob containing only a sufficiently-ordinary constant | |
3525 | sub, the typeglob is replaced with a scalar-reference placeholder that | |
3526 | more compactly represents the same thing. | |
f7461760 Z |
3527 | |
3528 | =cut | |
3529 | */ | |
3530 | ||
3531 | void | |
3532 | Perl_gv_try_downgrade(pTHX_ GV *gv) | |
3533 | { | |
3534 | HV *stash; | |
3535 | CV *cv; | |
3536 | HEK *namehek; | |
3537 | SV **gvp; | |
3538 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; | |
95f56751 FC |
3539 | |
3540 | /* XXX Why and where does this leave dangling pointers during global | |
3541 | destruction? */ | |
627364f1 | 3542 | if (PL_phase == PERL_PHASE_DESTRUCT) return; |
95f56751 | 3543 | |
2867cdbc | 3544 | if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
803f2748 | 3545 | !SvOBJECT(gv) && !SvREADONLY(gv) && |
f7461760 | 3546 | isGV_with_GP(gv) && GvGP(gv) && |
2867cdbc | 3547 | !GvINTRO(gv) && GvREFCNT(gv) == 1 && |
f7461760 | 3548 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && |
099be4f1 | 3549 | GvEGVx(gv) == gv && (stash = GvSTASH(gv)))) |
2867cdbc | 3550 | return; |
2be08ad1 FC |
3551 | if (gv == PL_statgv || gv == PL_last_in_gv || gv == PL_stderrgv) |
3552 | return; | |
803f2748 DM |
3553 | if (SvMAGICAL(gv)) { |
3554 | MAGIC *mg; | |
3555 | /* only backref magic is allowed */ | |
3556 | if (SvGMAGICAL(gv) || SvSMAGICAL(gv)) | |
3557 | return; | |
3558 | for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) { | |
3559 | if (mg->mg_type != PERL_MAGIC_backref) | |
3560 | return; | |
3561 | } | |
3562 | } | |
2867cdbc Z |
3563 | cv = GvCV(gv); |
3564 | if (!cv) { | |
3565 | HEK *gvnhek = GvNAME_HEK(gv); | |
0ca9877d | 3566 | (void)hv_deletehek(stash, gvnhek, G_DISCARD); |
8941bf97 | 3567 | } else if (GvMULTI(gv) && cv && SvREFCNT(cv) == 1 && |
f7461760 | 3568 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
34d81fc4 | 3569 | CvSTASH(cv) == stash && !CvNAMED(cv) && CvGV(cv) == gv && |
f7461760 Z |
3570 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && |
3571 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && | |
3572 | (namehek = GvNAME_HEK(gv)) && | |
48c2c411 | 3573 | (gvp = hv_fetchhek(stash, namehek, 0)) && |
f7461760 Z |
3574 | *gvp == (SV*)gv) { |
3575 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); | |
70e5f2b5 | 3576 | const bool imported = !!GvIMPORTED_CV(gv); |
f7461760 Z |
3577 | SvREFCNT(gv) = 0; |
3578 | sv_clear((SV*)gv); | |
3579 | SvREFCNT(gv) = 1; | |
70e5f2b5 | 3580 | SvFLAGS(gv) = SVt_IV|SVf_ROK|SVprv_PCS_IMPORTED * imported; |
dc6369ef EH |
3581 | |
3582 | /* See also: 'SET_SVANY_FOR_BODYLESS_IV' in sv.c */ | |
f7461760 Z |
3583 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - |
3584 | STRUCT_OFFSET(XPVIV, xiv_iv)); | |
3585 | SvRV_set(gv, value); | |
3586 | } | |
3587 | } | |
3588 | ||
9e3fb20c FC |
3589 | GV * |
3590 | Perl_gv_override(pTHX_ const char * const name, const STRLEN len) | |
3591 | { | |
3592 | GV *gv = gv_fetchpvn(name, len, GV_NOTQUAL, SVt_PVCV); | |
3593 | GV * const *gvp; | |
3594 | PERL_ARGS_ASSERT_GV_OVERRIDE; | |
3595 | if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) return gv; | |
3596 | gvp = (GV**)hv_fetch(PL_globalstash, name, len, FALSE); | |
3597 | gv = gvp ? *gvp : NULL; | |
3598 | if (gv && !isGV(gv)) { | |
3599 | if (!SvPCS_IMPORTED(gv)) return NULL; | |
3600 | gv_init(gv, PL_globalstash, name, len, 0); | |
3601 | return gv; | |
3602 | } | |
3603 | return gv && GvCVu(gv) && GvIMPORTED_CV(gv) ? gv : NULL; | |
3604 | } | |
3605 | ||
4aaa4757 FC |
3606 | #include "XSUB.h" |
3607 | ||
3608 | static void | |
3609 | core_xsub(pTHX_ CV* cv) | |
3610 | { | |
3611 | Perl_croak(aTHX_ | |
3612 | "&CORE::%s cannot be called directly", GvNAME(CvGV(cv)) | |
3613 | ); | |
3614 | } | |
3615 | ||
f7461760 | 3616 | /* |
14d04a33 | 3617 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3618 | */ |