Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
1129b882 | 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
67fbe0e1 | 4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others |
79072805 LW |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
a0d0e21e LW |
9 | */ |
10 | ||
11 | /* | |
12 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure | |
4ac71550 | 13 | * of your inquisitiveness, I shall spend all the rest of my days in answering |
a0d0e21e LW |
14 | * you. What more do you want to know?' |
15 | * 'The names of all the stars, and of all living things, and the whole | |
16 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' | |
17 | * laughed Pippin. | |
4ac71550 | 18 | * |
cdad3b53 | 19 | * [p.599 of _The Lord of the Rings_, III/xi: "The PalantÃr"] |
79072805 LW |
20 | */ |
21 | ||
ccfc67b7 | 22 | /* |
51b56f5c | 23 | =head1 GV Handling |
166f8a29 DM |
24 | A GV is a structure which corresponds to to a Perl typeglob, ie *foo. |
25 | It is a structure that holds a pointer to a scalar, an array, a hash etc, | |
26 | corresponding to $foo, @foo, %foo. | |
27 | ||
28 | GVs are usually found as values in stashes (symbol table hashes) where | |
29 | Perl stores its global variables. | |
30 | ||
fa2b244a KW |
31 | =for apidoc Ayh||GV |
32 | ||
166f8a29 | 33 | =cut |
ccfc67b7 JH |
34 | */ |
35 | ||
79072805 | 36 | #include "EXTERN.h" |
864dbfa3 | 37 | #define PERL_IN_GV_C |
79072805 | 38 | #include "perl.h" |
6ffcffbd | 39 | #include "overload.inc" |
4aaa4757 | 40 | #include "keywords.h" |
2846acbf | 41 | #include "feature.h" |
79072805 | 42 | |
f54cb97a | 43 | static const char S_autoload[] = "AUTOLOAD"; |
3c81f0b3 | 44 | #define S_autolen (sizeof("AUTOLOAD")-1) |
5c7983e5 | 45 | |
13c59d41 MH |
46 | GV * |
47 | Perl_gv_add_by_type(pTHX_ GV *gv, svtype type) | |
c69033f2 | 48 | { |
d5713896 | 49 | SV **where; |
7918f24d | 50 | |
13c59d41 MH |
51 | if ( |
52 | !gv | |
53 | || ( | |
54 | SvTYPE((const SV *)gv) != SVt_PVGV | |
13be902c | 55 | && SvTYPE((const SV *)gv) != SVt_PVLV |
13c59d41 | 56 | ) |
13be902c | 57 | ) { |
bb85b28a | 58 | const char *what; |
13c59d41 | 59 | if (type == SVt_PVIO) { |
bb85b28a NC |
60 | /* |
61 | * if it walks like a dirhandle, then let's assume that | |
62 | * this is a dirhandle. | |
63 | */ | |
332c2eac | 64 | what = OP_IS_DIRHOP(PL_op->op_type) ? |
bb85b28a | 65 | "dirhandle" : "filehandle"; |
13c59d41 | 66 | } else if (type == SVt_PVHV) { |
bb85b28a NC |
67 | what = "hash"; |
68 | } else { | |
13c59d41 | 69 | what = type == SVt_PVAV ? "array" : "scalar"; |
bb85b28a | 70 | } |
de6f7947 | 71 | /* diag_listed_as: Bad symbol for filehandle */ |
bb85b28a NC |
72 | Perl_croak(aTHX_ "Bad symbol for %s", what); |
73 | } | |
d5713896 | 74 | |
13c59d41 MH |
75 | if (type == SVt_PVHV) { |
76 | where = (SV **)&GvHV(gv); | |
77 | } else if (type == SVt_PVAV) { | |
78 | where = (SV **)&GvAV(gv); | |
79 | } else if (type == SVt_PVIO) { | |
80 | where = (SV **)&GvIOp(gv); | |
81 | } else { | |
82 | where = &GvSV(gv); | |
83 | } | |
7918f24d | 84 | |
13c59d41 MH |
85 | if (!*where) |
86 | { | |
87 | *where = newSV_type(type); | |
b59bf0b2 KW |
88 | if (type == SVt_PVAV |
89 | && memEQs(GvNAME(gv), GvNAMELEN(gv), "ISA")) | |
13c59d41 | 90 | sv_magic(*where, (SV *)gv, PERL_MAGIC_isa, NULL, 0); |
e17aed30 | 91 | } |
13c59d41 | 92 | return gv; |
79072805 LW |
93 | } |
94 | ||
95 | GV * | |
864dbfa3 | 96 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 97 | { |
7918f24d | 98 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec NC |
99 | return gv_fetchfile_flags(name, strlen(name), 0); |
100 | } | |
101 | ||
102 | GV * | |
103 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
104 | const U32 flags) | |
105 | { | |
4116122e | 106 | char smallbuf[128]; |
53d95988 | 107 | char *tmpbuf; |
d9095cec | 108 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
109 | GV *gv; |
110 | ||
7918f24d | 111 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec NC |
112 | PERL_UNUSED_ARG(flags); |
113 | ||
1d7c1841 | 114 | if (!PL_defstash) |
a0714e2c | 115 | return NULL; |
1d7c1841 | 116 | |
d9095cec | 117 | if (tmplen <= sizeof smallbuf) |
53d95988 CS |
118 | tmpbuf = smallbuf; |
119 | else | |
798b63bc | 120 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 121 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
122 | tmpbuf[0] = '_'; |
123 | tmpbuf[1] = '<'; | |
d9095cec NC |
124 | memcpy(tmpbuf + 2, name, namelen); |
125 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); | |
1d7c1841 | 126 | if (!isGV(gv)) { |
d9095cec | 127 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 | 128 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec | 129 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 130 | #else |
d9095cec | 131 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 132 | #endif |
1d7c1841 | 133 | } |
c7a622b3 | 134 | if (PERLDB_LINE_OR_SAVESRC && !GvAV(gv)) |
43e4250a | 135 | hv_magic(GvHVn(gv), GvAVn(gv), PERL_MAGIC_dbfile); |
53d95988 CS |
136 | if (tmpbuf != smallbuf) |
137 | Safefree(tmpbuf); | |
79072805 LW |
138 | return gv; |
139 | } | |
140 | ||
62d55b22 NC |
141 | /* |
142 | =for apidoc gv_const_sv | |
143 | ||
144 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
145 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
146 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
796b6530 | 147 | C<NULL>. |
62d55b22 NC |
148 | |
149 | =cut | |
150 | */ | |
151 | ||
152 | SV * | |
153 | Perl_gv_const_sv(pTHX_ GV *gv) | |
154 | { | |
7918f24d | 155 | PERL_ARGS_ASSERT_GV_CONST_SV; |
23491f1d | 156 | PERL_UNUSED_CONTEXT; |
7918f24d | 157 | |
62d55b22 NC |
158 | if (SvTYPE(gv) == SVt_PVGV) |
159 | return cv_const_sv(GvCVu(gv)); | |
16a6e5a4 | 160 | return SvROK(gv) && SvTYPE(SvRV(gv)) != SVt_PVAV && SvTYPE(SvRV(gv)) != SVt_PVCV ? SvRV(gv) : NULL; |
62d55b22 NC |
161 | } |
162 | ||
12816592 NC |
163 | GP * |
164 | Perl_newGP(pTHX_ GV *const gv) | |
165 | { | |
166 | GP *gp; | |
19bad673 | 167 | U32 hash; |
19bad673 NC |
168 | const char *file; |
169 | STRLEN len; | |
2639089b | 170 | #ifndef USE_ITHREADS |
6b352265 | 171 | GV *filegv; |
2639089b | 172 | #endif |
19bad673 | 173 | |
7918f24d | 174 | PERL_ARGS_ASSERT_NEWGP; |
2639089b DD |
175 | Newxz(gp, 1, GP); |
176 | gp->gp_egv = gv; /* allow compiler to reuse gv after this */ | |
177 | #ifndef PERL_DONT_CREATE_GVSV | |
178 | gp->gp_sv = newSV(0); | |
179 | #endif | |
7918f24d | 180 | |
c947bc1d FC |
181 | /* PL_curcop may be null here. E.g., |
182 | INIT { bless {} and exit } | |
183 | frees INIT before looking up DESTROY (and creating *DESTROY) | |
184 | */ | |
2639089b DD |
185 | if (PL_curcop) { |
186 | gp->gp_line = CopLINE(PL_curcop); /* 0 otherwise Newxz */ | |
6e314d4f | 187 | #ifdef USE_ITHREADS |
2639089b DD |
188 | if (CopFILE(PL_curcop)) { |
189 | file = CopFILE(PL_curcop); | |
190 | len = strlen(file); | |
191 | } | |
2639089b | 192 | #else |
cb0d3385 FC |
193 | filegv = CopFILEGV(PL_curcop); |
194 | if (filegv) { | |
195 | file = GvNAME(filegv)+2; | |
196 | len = GvNAMELEN(filegv)-2; | |
197 | } | |
6e314d4f | 198 | #endif |
cb0d3385 FC |
199 | else goto no_file; |
200 | } | |
201 | else { | |
202 | no_file: | |
19bad673 NC |
203 | file = ""; |
204 | len = 0; | |
205 | } | |
f4890806 NC |
206 | |
207 | PERL_HASH(hash, file, len); | |
f4890806 | 208 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
209 | gp->gp_refcnt = 1; |
210 | ||
211 | return gp; | |
212 | } | |
213 | ||
803f2748 DM |
214 | /* Assign CvGV(cv) = gv, handling weak references. |
215 | * See also S_anonymise_cv_maybe */ | |
216 | ||
217 | void | |
218 | Perl_cvgv_set(pTHX_ CV* cv, GV* gv) | |
219 | { | |
ae77754a | 220 | GV * const oldgv = CvNAMED(cv) ? NULL : SvANY(cv)->xcv_gv_u.xcv_gv; |
b290562e | 221 | HEK *hek; |
803f2748 DM |
222 | PERL_ARGS_ASSERT_CVGV_SET; |
223 | ||
224 | if (oldgv == gv) | |
225 | return; | |
226 | ||
227 | if (oldgv) { | |
cfc1e951 | 228 | if (CvCVGV_RC(cv)) { |
e7881358 | 229 | SvREFCNT_dec_NN(oldgv); |
cfc1e951 DM |
230 | CvCVGV_RC_off(cv); |
231 | } | |
803f2748 | 232 | else { |
803f2748 DM |
233 | sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv)); |
234 | } | |
235 | } | |
db5cc3ee FC |
236 | else if ((hek = CvNAME_HEK(cv))) { |
237 | unshare_hek(hek); | |
f3feca7a | 238 | CvLEXICAL_off(cv); |
db5cc3ee | 239 | } |
803f2748 | 240 | |
5988f306 | 241 | CvNAMED_off(cv); |
b290562e | 242 | SvANY(cv)->xcv_gv_u.xcv_gv = gv; |
c794ca97 | 243 | assert(!CvCVGV_RC(cv)); |
803f2748 DM |
244 | |
245 | if (!gv) | |
246 | return; | |
247 | ||
c794ca97 DM |
248 | if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv)) |
249 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv)); | |
250 | else { | |
cfc1e951 | 251 | CvCVGV_RC_on(cv); |
803f2748 DM |
252 | SvREFCNT_inc_simple_void_NN(gv); |
253 | } | |
803f2748 DM |
254 | } |
255 | ||
ae77754a FC |
256 | /* Convert CvSTASH + CvNAME_HEK into a GV. Conceptually, all subs have a |
257 | GV, but for efficiency that GV may not in fact exist. This function, | |
258 | called by CvGV, reifies it. */ | |
259 | ||
260 | GV * | |
261 | Perl_cvgv_from_hek(pTHX_ CV *cv) | |
262 | { | |
263 | GV *gv; | |
2eaf799e | 264 | SV **svp; |
ae77754a FC |
265 | PERL_ARGS_ASSERT_CVGV_FROM_HEK; |
266 | assert(SvTYPE(cv) == SVt_PVCV); | |
267 | if (!CvSTASH(cv)) return NULL; | |
268 | ASSUME(CvNAME_HEK(cv)); | |
2eaf799e FC |
269 | svp = hv_fetchhek(CvSTASH(cv), CvNAME_HEK(cv), 0); |
270 | gv = MUTABLE_GV(svp && *svp ? *svp : newSV(0)); | |
271 | if (!isGV(gv)) | |
272 | gv_init_pvn(gv, CvSTASH(cv), HEK_KEY(CvNAME_HEK(cv)), | |
ae77754a FC |
273 | HEK_LEN(CvNAME_HEK(cv)), |
274 | SVf_UTF8 * !!HEK_UTF8(CvNAME_HEK(cv))); | |
2eaf799e FC |
275 | if (!CvNAMED(cv)) { /* gv_init took care of it */ |
276 | assert (SvANY(cv)->xcv_gv_u.xcv_gv == gv); | |
277 | return gv; | |
278 | } | |
ae77754a FC |
279 | unshare_hek(CvNAME_HEK(cv)); |
280 | CvNAMED_off(cv); | |
281 | SvANY(cv)->xcv_gv_u.xcv_gv = gv; | |
2eaf799e | 282 | if (svp && *svp) SvREFCNT_inc_simple_void_NN(gv); |
ae77754a FC |
283 | CvCVGV_RC_on(cv); |
284 | return gv; | |
285 | } | |
286 | ||
c68d9564 Z |
287 | /* Assign CvSTASH(cv) = st, handling weak references. */ |
288 | ||
289 | void | |
290 | Perl_cvstash_set(pTHX_ CV *cv, HV *st) | |
291 | { | |
292 | HV *oldst = CvSTASH(cv); | |
293 | PERL_ARGS_ASSERT_CVSTASH_SET; | |
294 | if (oldst == st) | |
295 | return; | |
296 | if (oldst) | |
297 | sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv)); | |
298 | SvANY(cv)->xcv_stash = st; | |
299 | if (st) | |
300 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv)); | |
301 | } | |
803f2748 | 302 | |
e1104062 FC |
303 | /* |
304 | =for apidoc gv_init_pvn | |
305 | ||
306 | Converts a scalar into a typeglob. This is an incoercible typeglob; | |
307 | assigning a reference to it will assign to one of its slots, instead of | |
796b6530 KW |
308 | overwriting it as happens with typeglobs created by C<SvSetSV>. Converting |
309 | any scalar that is C<SvOK()> may produce unpredictable results and is reserved | |
e1104062 FC |
310 | for perl's internal use. |
311 | ||
312 | C<gv> is the scalar to be converted. | |
313 | ||
314 | C<stash> is the parent stash/package, if any. | |
315 | ||
04ec7e59 FC |
316 | C<name> and C<len> give the name. The name must be unqualified; |
317 | that is, it must not include the package name. If C<gv> is a | |
e1104062 FC |
318 | stash element, it is the caller's responsibility to ensure that the name |
319 | passed to this function matches the name of the element. If it does not | |
320 | match, perl's internal bookkeeping will get out of sync. | |
321 | ||
4a4088c4 | 322 | C<flags> can be set to C<SVf_UTF8> if C<name> is a UTF-8 string, or |
04ec7e59 | 323 | the return value of SvUTF8(sv). It can also take the |
796b6530 | 324 | C<GV_ADDMULTI> flag, which means to pretend that the GV has been |
e1104062 FC |
325 | seen before (i.e., suppress "Used once" warnings). |
326 | ||
5af38e47 KW |
327 | =for apidoc Amnh||GV_ADDMULTI |
328 | ||
e1104062 FC |
329 | =for apidoc gv_init |
330 | ||
4a4088c4 | 331 | The old form of C<gv_init_pvn()>. It does not work with UTF-8 strings, as it |
04ec7e59 | 332 | has no flags parameter. If the C<multi> parameter is set, the |
796b6530 | 333 | C<GV_ADDMULTI> flag will be passed to C<gv_init_pvn()>. |
e1104062 FC |
334 | |
335 | =for apidoc gv_init_pv | |
336 | ||
796b6530 | 337 | Same as C<gv_init_pvn()>, but takes a nul-terminated string for the name |
e1104062 FC |
338 | instead of separate char * and length parameters. |
339 | ||
340 | =for apidoc gv_init_sv | |
341 | ||
796b6530 | 342 | Same as C<gv_init_pvn()>, but takes an SV * for the name instead of separate |
e1104062 FC |
343 | char * and length parameters. C<flags> is currently unused. |
344 | ||
345 | =cut | |
346 | */ | |
347 | ||
463ee0b2 | 348 | void |
04ec7e59 | 349 | Perl_gv_init_sv(pTHX_ GV *gv, HV *stash, SV* namesv, U32 flags) |
e6066781 BF |
350 | { |
351 | char *namepv; | |
352 | STRLEN namelen; | |
353 | PERL_ARGS_ASSERT_GV_INIT_SV; | |
354 | namepv = SvPV(namesv, namelen); | |
355 | if (SvUTF8(namesv)) | |
356 | flags |= SVf_UTF8; | |
04ec7e59 | 357 | gv_init_pvn(gv, stash, namepv, namelen, flags); |
e6066781 BF |
358 | } |
359 | ||
360 | void | |
04ec7e59 | 361 | Perl_gv_init_pv(pTHX_ GV *gv, HV *stash, const char *name, U32 flags) |
e6066781 BF |
362 | { |
363 | PERL_ARGS_ASSERT_GV_INIT_PV; | |
04ec7e59 | 364 | gv_init_pvn(gv, stash, name, strlen(name), flags); |
e6066781 BF |
365 | } |
366 | ||
367 | void | |
04ec7e59 | 368 | Perl_gv_init_pvn(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, U32 flags) |
463ee0b2 | 369 | { |
3b6733bf NC |
370 | const U32 old_type = SvTYPE(gv); |
371 | const bool doproto = old_type > SVt_NULL; | |
f9509170 | 372 | char * const proto = (doproto && SvPOK(gv)) |
dad95a0a | 373 | ? ((void)(SvIsCOW(gv) && (sv_force_normal((SV *)gv), 0)), SvPVX(gv)) |
f9509170 | 374 | : NULL; |
49a54bbe | 375 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
e0260a5b | 376 | const U32 proto_utf8 = proto ? SvUTF8(gv) : 0; |
756cb477 | 377 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 378 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
6881372e FC |
379 | const bool really_sub = |
380 | has_constant && SvTYPE(has_constant) == SVt_PVCV; | |
381 | COP * const old = PL_curcop; | |
756cb477 | 382 | |
e6066781 | 383 | PERL_ARGS_ASSERT_GV_INIT_PVN; |
756cb477 NC |
384 | assert (!(proto && has_constant)); |
385 | ||
386 | if (has_constant) { | |
2eaf799e | 387 | /* The constant has to be a scalar, array or subroutine. */ |
5c1f4d79 | 388 | switch (SvTYPE(has_constant)) { |
5c1f4d79 | 389 | case SVt_PVHV: |
5c1f4d79 NC |
390 | case SVt_PVFM: |
391 | case SVt_PVIO: | |
392 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
393 | sv_reftype(has_constant, 0)); | |
c9a0dcdc | 394 | NOT_REACHED; /* NOTREACHED */ |
4bbde2f7 | 395 | break; |
81d52ecd | 396 | |
42d0e0b7 | 397 | default: NOOP; |
5c1f4d79 | 398 | } |
756cb477 NC |
399 | SvRV_set(gv, NULL); |
400 | SvROK_off(gv); | |
401 | } | |
463ee0b2 | 402 | |
3b6733bf NC |
403 | |
404 | if (old_type < SVt_PVGV) { | |
405 | if (old_type >= SVt_PV) | |
406 | SvCUR_set(gv, 0); | |
ad64d0ec | 407 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); |
3b6733bf | 408 | } |
55d729e4 GS |
409 | if (SvLEN(gv)) { |
410 | if (proto) { | |
f880fe2f | 411 | SvPV_set(gv, NULL); |
b162af07 | 412 | SvLEN_set(gv, 0); |
55d729e4 GS |
413 | SvPOK_off(gv); |
414 | } else | |
94010e71 | 415 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 416 | } |
2e5b91de NC |
417 | SvIOK_off(gv); |
418 | isGV_with_GP_on(gv); | |
12816592 | 419 | |
6881372e FC |
420 | if (really_sub && !CvISXSUB(has_constant) && CvSTART(has_constant) |
421 | && ( CvSTART(has_constant)->op_type == OP_NEXTSTATE | |
422 | || CvSTART(has_constant)->op_type == OP_DBSTATE)) | |
423 | PL_curcop = (COP *)CvSTART(has_constant); | |
c43ae56f | 424 | GvGP_set(gv, Perl_newGP(aTHX_ gv)); |
6881372e | 425 | PL_curcop = old; |
e15faf7d NC |
426 | GvSTASH(gv) = stash; |
427 | if (stash) | |
ad64d0ec | 428 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
04f3bf56 | 429 | gv_name_set(gv, name, len, GV_ADD | ( flags & SVf_UTF8 ? SVf_UTF8 : 0 )); |
04ec7e59 FC |
430 | if (flags & GV_ADDMULTI || doproto) /* doproto means it */ |
431 | GvMULTI_on(gv); /* _was_ mentioned */ | |
6881372e | 432 | if (really_sub) { |
2eaf799e FC |
433 | /* Not actually a constant. Just a regular sub. */ |
434 | CV * const cv = (CV *)has_constant; | |
435 | GvCV_set(gv,cv); | |
790acdde | 436 | if (CvNAMED(cv) && CvSTASH(cv) == stash && ( |
2eaf799e FC |
437 | CvNAME_HEK(cv) == GvNAME_HEK(gv) |
438 | || ( HEK_LEN(CvNAME_HEK(cv)) == HEK_LEN(GvNAME_HEK(gv)) | |
439 | && HEK_FLAGS(CvNAME_HEK(cv)) != HEK_FLAGS(GvNAME_HEK(gv)) | |
440 | && HEK_UTF8(CvNAME_HEK(cv)) == HEK_UTF8(GvNAME_HEK(gv)) | |
441 | && memEQ(HEK_KEY(CvNAME_HEK(cv)), GvNAME(gv), GvNAMELEN(gv)) | |
442 | ) | |
443 | )) | |
444 | CvGV_set(cv,gv); | |
445 | } | |
446 | else if (doproto) { | |
e3d2b9e7 | 447 | CV *cv; |
756cb477 NC |
448 | if (has_constant) { |
449 | /* newCONSTSUB takes ownership of the reference from us. */ | |
e38acfd7 | 450 | cv = newCONSTSUB_flags(stash, name, len, flags, has_constant); |
75bd28cf FC |
451 | /* In case op.c:S_process_special_blocks stole it: */ |
452 | if (!GvCV(gv)) | |
c43ae56f | 453 | GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv)); |
439cdf38 | 454 | assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */ |
1ccdb730 NC |
455 | /* If this reference was a copy of another, then the subroutine |
456 | must have been "imported", by a Perl space assignment to a GV | |
457 | from a reference to CV. */ | |
458 | if (exported_constant) | |
459 | GvIMPORTED_CV_on(gv); | |
186a5ba8 | 460 | CvSTASH_set(cv, PL_curstash); /* XXX Why is this needed? */ |
756cb477 | 461 | } else { |
186a5ba8 | 462 | cv = newSTUB(gv,1); |
756cb477 | 463 | } |
55d729e4 | 464 | if (proto) { |
e3d2b9e7 | 465 | sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen, |
49a54bbe | 466 | SV_HAS_TRAILING_NUL); |
e0260a5b | 467 | if ( proto_utf8 ) SvUTF8_on(MUTABLE_SV(cv)); |
55d729e4 GS |
468 | } |
469 | } | |
463ee0b2 LW |
470 | } |
471 | ||
76e3520e | 472 | STATIC void |
e6066781 | 473 | S_gv_init_svtype(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 474 | { |
13c59d41 MH |
475 | PERL_ARGS_ASSERT_GV_INIT_SVTYPE; |
476 | ||
477 | switch (sv_type) { | |
478 | case SVt_PVIO: | |
479 | (void)GvIOn(gv); | |
480 | break; | |
481 | case SVt_PVAV: | |
482 | (void)GvAVn(gv); | |
483 | break; | |
484 | case SVt_PVHV: | |
485 | (void)GvHVn(gv); | |
486 | break; | |
c69033f2 | 487 | #ifdef PERL_DONT_CREATE_GVSV |
13c59d41 MH |
488 | case SVt_NULL: |
489 | case SVt_PVCV: | |
490 | case SVt_PVFM: | |
491 | case SVt_PVGV: | |
492 | break; | |
493 | default: | |
494 | if(GvSVn(gv)) { | |
495 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
496 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
497 | its side effect */ | |
498 | } | |
c69033f2 | 499 | #endif |
a0d0e21e LW |
500 | } |
501 | } | |
502 | ||
0f8d4b5e FC |
503 | static void core_xsub(pTHX_ CV* cv); |
504 | ||
505 | static GV * | |
506 | S_maybe_add_coresub(pTHX_ HV * const stash, GV *gv, | |
87566176 | 507 | const char * const name, const STRLEN len) |
0f8d4b5e FC |
508 | { |
509 | const int code = keyword(name, len, 1); | |
510 | static const char file[] = __FILE__; | |
97021f77 | 511 | CV *cv, *oldcompcv = NULL; |
0f8d4b5e | 512 | int opnum = 0; |
0f8d4b5e | 513 | bool ampable = TRUE; /* &{}-able */ |
97021f77 FC |
514 | COP *oldcurcop = NULL; |
515 | yy_parser *oldparser = NULL; | |
516 | I32 oldsavestack_ix = 0; | |
0f8d4b5e FC |
517 | |
518 | assert(gv || stash); | |
519 | assert(name); | |
0f8d4b5e | 520 | |
88b892d8 FC |
521 | if (!code) return NULL; /* Not a keyword */ |
522 | switch (code < 0 ? -code : code) { | |
0f8d4b5e | 523 | /* no support for \&CORE::infix; |
d885f758 | 524 | no support for funcs that do not parse like funcs */ |
88b892d8 | 525 | case KEY___DATA__: case KEY___END__: case KEY_and: case KEY_AUTOLOAD: |
a96df643 | 526 | case KEY_BEGIN : case KEY_CHECK : case KEY_cmp: |
7896dde7 | 527 | case KEY_default : case KEY_DESTROY: |
88b892d8 | 528 | case KEY_do : case KEY_dump : case KEY_else : case KEY_elsif : |
d51f8b19 | 529 | case KEY_END : case KEY_eq : case KEY_eval : |
88b892d8 | 530 | case KEY_for : case KEY_foreach: case KEY_format: case KEY_ge : |
813e85a0 PE |
531 | case KEY_given : case KEY_goto : case KEY_grep : case KEY_gt : |
532 | case KEY_if : case KEY_isa : case KEY_INIT : case KEY_last : | |
533 | case KEY_le : case KEY_local : case KEY_lt : case KEY_m : | |
534 | case KEY_map : case KEY_my: | |
88b892d8 | 535 | case KEY_ne : case KEY_next : case KEY_no: case KEY_or: case KEY_our: |
1efec5ed | 536 | case KEY_package: case KEY_print: case KEY_printf: |
919ad5f7 | 537 | case KEY_q : case KEY_qq : case KEY_qr : case KEY_qw : |
88b892d8 | 538 | case KEY_qx : case KEY_redo : case KEY_require: case KEY_return: |
d33bb3da | 539 | case KEY_s : case KEY_say : case KEY_sort : |
d80ed303 | 540 | case KEY_state: case KEY_sub : |
46bef06f | 541 | case KEY_tr : case KEY_UNITCHECK: case KEY_unless: |
7896dde7 | 542 | case KEY_until: case KEY_use : case KEY_when : case KEY_while : |
88b892d8 | 543 | case KEY_x : case KEY_xor : case KEY_y : |
0f8d4b5e FC |
544 | return NULL; |
545 | case KEY_chdir: | |
eb31eb35 | 546 | case KEY_chomp: case KEY_chop: case KEY_defined: case KEY_delete: |
73665bc4 | 547 | case KEY_eof : case KEY_exec: case KEY_exists : |
0f8d4b5e | 548 | case KEY_lstat: |
bea284c8 | 549 | case KEY_split: |
0f8d4b5e FC |
550 | case KEY_stat: |
551 | case KEY_system: | |
552 | case KEY_truncate: case KEY_unlink: | |
0f8d4b5e FC |
553 | ampable = FALSE; |
554 | } | |
555 | if (!gv) { | |
556 | gv = (GV *)newSV(0); | |
557 | gv_init(gv, stash, name, len, TRUE); | |
558 | } | |
7e68c38b | 559 | GvMULTI_on(gv); |
0f8d4b5e FC |
560 | if (ampable) { |
561 | ENTER; | |
562 | oldcurcop = PL_curcop; | |
563 | oldparser = PL_parser; | |
564 | lex_start(NULL, NULL, 0); | |
565 | oldcompcv = PL_compcv; | |
566 | PL_compcv = NULL; /* Prevent start_subparse from setting | |
567 | CvOUTSIDE. */ | |
568 | oldsavestack_ix = start_subparse(FALSE,0); | |
569 | cv = PL_compcv; | |
570 | } | |
571 | else { | |
572 | /* Avoid calling newXS, as it calls us, and things start to | |
573 | get hairy. */ | |
574 | cv = MUTABLE_CV(newSV_type(SVt_PVCV)); | |
575 | GvCV_set(gv,cv); | |
576 | GvCVGEN(gv) = 0; | |
0f8d4b5e FC |
577 | CvISXSUB_on(cv); |
578 | CvXSUB(cv) = core_xsub; | |
eacbb379 | 579 | PoisonPADLIST(cv); |
0f8d4b5e FC |
580 | } |
581 | CvGV_set(cv, gv); /* This stops new ATTRSUB from setting CvFILE | |
582 | from PL_curcop. */ | |
9b669ea1 DD |
583 | /* XSUBs can't be perl lang/perl5db.pl debugged |
584 | if (PERLDB_LINE_OR_SAVESRC) | |
585 | (void)gv_fetchfile(file); */ | |
0f8d4b5e FC |
586 | CvFILE(cv) = (char *)file; |
587 | /* XXX This is inefficient, as doing things this order causes | |
588 | a prototype check in newATTRSUB. But we have to do | |
589 | it this order as we need an op number before calling | |
590 | new ATTRSUB. */ | |
591 | (void)core_prototype((SV *)cv, name, code, &opnum); | |
87566176 | 592 | if (stash) |
73c02f15 | 593 | (void)hv_store(stash,name,len,(SV *)gv,0); |
0f8d4b5e | 594 | if (ampable) { |
4428fb0e TC |
595 | #ifdef DEBUGGING |
596 | CV *orig_cv = cv; | |
597 | #endif | |
0f8d4b5e | 598 | CvLVALUE_on(cv); |
4428fb0e TC |
599 | /* newATTRSUB will free the CV and return NULL if we're still |
600 | compiling after a syntax error */ | |
e8f91c91 | 601 | if ((cv = newATTRSUB_x( |
7e68c38b | 602 | oldsavestack_ix, (OP *)gv, |
0f8d4b5e FC |
603 | NULL,NULL, |
604 | coresub_op( | |
605 | opnum | |
606 | ? newSVuv((UV)opnum) | |
607 | : newSVpvn(name,len), | |
608 | code, opnum | |
7e68c38b | 609 | ), |
e8f91c91 | 610 | TRUE |
4428fb0e TC |
611 | )) != NULL) { |
612 | assert(GvCV(gv) == orig_cv); | |
613 | if (opnum != OP_VEC && opnum != OP_SUBSTR && opnum != OP_POS | |
cd642408 | 614 | && opnum != OP_UNDEF && opnum != OP_KEYS) |
4428fb0e TC |
615 | CvLVALUE_off(cv); /* Now *that* was a neat trick. */ |
616 | } | |
0f8d4b5e FC |
617 | LEAVE; |
618 | PL_parser = oldparser; | |
619 | PL_curcop = oldcurcop; | |
620 | PL_compcv = oldcompcv; | |
621 | } | |
4428fb0e | 622 | if (cv) { |
a83b92fa Z |
623 | SV *opnumsv = newSViv( |
624 | (opnum == OP_ENTEREVAL && len == 9 && memEQ(name, "evalbytes", 9)) ? | |
625 | (OP_ENTEREVAL | (1<<16)) | |
626 | : opnum ? opnum : (((I32)name[2]) << 16)); | |
627 | cv_set_call_checker_flags(cv, Perl_ck_entersub_args_core, opnumsv, 0); | |
628 | SvREFCNT_dec_NN(opnumsv); | |
4428fb0e TC |
629 | } |
630 | ||
0f8d4b5e FC |
631 | return gv; |
632 | } | |
633 | ||
954c1994 | 634 | /* |
6c53d59b FC |
635 | =for apidoc gv_fetchmeth |
636 | ||
637 | Like L</gv_fetchmeth_pvn>, but lacks a flags parameter. | |
638 | ||
e6919483 BF |
639 | =for apidoc gv_fetchmeth_sv |
640 | ||
641 | Exactly like L</gv_fetchmeth_pvn>, but takes the name string in the form | |
642 | of an SV instead of a string/length pair. | |
643 | ||
644 | =cut | |
645 | */ | |
646 | ||
647 | GV * | |
648 | Perl_gv_fetchmeth_sv(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
649 | { | |
c290e187 | 650 | char *namepv; |
651 | STRLEN namelen; | |
652 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV; | |
653 | if (LIKELY(SvPOK_nog(namesv))) /* common case */ | |
14062320 FC |
654 | return gv_fetchmeth_internal(stash, namesv, NULL, 0, level, |
655 | flags | SvUTF8(namesv)); | |
c290e187 | 656 | namepv = SvPV(namesv, namelen); |
657 | if (SvUTF8(namesv)) flags |= SVf_UTF8; | |
658 | return gv_fetchmeth_pvn(stash, namepv, namelen, level, flags); | |
e6919483 BF |
659 | } |
660 | ||
661 | /* | |
662 | =for apidoc gv_fetchmeth_pv | |
663 | ||
664 | Exactly like L</gv_fetchmeth_pvn>, but takes a nul-terminated string | |
665 | instead of a string/length pair. | |
666 | ||
667 | =cut | |
668 | */ | |
669 | ||
670 | GV * | |
671 | Perl_gv_fetchmeth_pv(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
672 | { | |
673 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV; | |
c6afe666 | 674 | return gv_fetchmeth_internal(stash, NULL, name, strlen(name), level, flags); |
e6919483 BF |
675 | } |
676 | ||
677 | /* | |
678 | =for apidoc gv_fetchmeth_pvn | |
954c1994 GS |
679 | |
680 | Returns the glob with the given C<name> and a defined subroutine or | |
681 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
796b6530 | 682 | accessible via C<@ISA> and C<UNIVERSAL::>. |
954c1994 GS |
683 | |
684 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
685 | side-effect creates a glob with the given C<name> in the given C<stash> | |
686 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 687 | up caching info for this glob. |
954c1994 | 688 | |
796b6530 | 689 | The only significant values for C<flags> are C<GV_SUPER> and C<SVf_UTF8>. |
aae43805 | 690 | |
796b6530 | 691 | C<GV_SUPER> indicates that we want to look up the method in the superclasses |
aae43805 | 692 | of the C<stash>. |
e6919483 | 693 | |
aae43805 | 694 | The |
954c1994 | 695 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b | 696 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 697 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 698 | obtained from the GV with the C<GvCV> macro. |
954c1994 | 699 | |
4f8d487a KW |
700 | =for apidoc Amnh||GV_SUPER |
701 | ||
954c1994 GS |
702 | =cut |
703 | */ | |
704 | ||
e1a479c5 BB |
705 | /* NOTE: No support for tied ISA */ |
706 | ||
c6afe666 | 707 | PERL_STATIC_INLINE GV* |
708 | S_gv_fetchmeth_internal(pTHX_ HV* stash, SV* meth, const char* name, STRLEN len, I32 level, U32 flags) | |
79072805 | 709 | { |
463ee0b2 | 710 | GV** gvp; |
c6afe666 | 711 | HE* he; |
e1a479c5 BB |
712 | AV* linear_av; |
713 | SV** linear_svp; | |
714 | SV* linear_sv; | |
aae43805 | 715 | HV* cstash, *cachestash; |
e1a479c5 BB |
716 | GV* candidate = NULL; |
717 | CV* cand_cv = NULL; | |
e1a479c5 | 718 | GV* topgv = NULL; |
bfcb3514 | 719 | const char *hvname; |
448aac91 | 720 | STRLEN hvnamelen; |
c6afe666 | 721 | I32 create = (level >= 0) ? HV_FETCH_LVALUE : 0; |
e1a479c5 | 722 | I32 items; |
e1a479c5 | 723 | U32 topgen_cmp; |
04f3bf56 | 724 | U32 is_utf8 = flags & SVf_UTF8; |
a0d0e21e | 725 | |
af09ea45 IK |
726 | /* UNIVERSAL methods should be callable without a stash */ |
727 | if (!stash) { | |
e1a479c5 | 728 | create = 0; /* probably appropriate */ |
da51bb9b | 729 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
730 | return 0; |
731 | } | |
732 | ||
e1a479c5 BB |
733 | assert(stash); |
734 | ||
bfcb3514 | 735 | hvname = HvNAME_get(stash); |
448aac91 | 736 | hvnamelen = HvNAMELEN_get(stash); |
bfcb3514 | 737 | if (!hvname) |
e1a479c5 | 738 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 739 | |
e1a479c5 | 740 | assert(hvname); |
55df6700 | 741 | assert(name || meth); |
463ee0b2 | 742 | |
aae43805 | 743 | DEBUG_o( Perl_deb(aTHX_ "Looking for %smethod %s in package %s\n", |
55df6700 FC |
744 | flags & GV_SUPER ? "SUPER " : "", |
745 | name ? name : SvPV_nolen(meth), hvname) ); | |
44a8e56a | 746 | |
dd69841b | 747 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 | 748 | |
aae43805 | 749 | if (flags & GV_SUPER) { |
1a33a059 FC |
750 | if (!HvAUX(stash)->xhv_mro_meta->super) |
751 | HvAUX(stash)->xhv_mro_meta->super = newHV(); | |
752 | cachestash = HvAUX(stash)->xhv_mro_meta->super; | |
aae43805 FC |
753 | } |
754 | else cachestash = stash; | |
755 | ||
e1a479c5 | 756 | /* check locally for a real method or a cache entry */ |
c6afe666 | 757 | he = (HE*)hv_common( |
1cde3371 | 758 | cachestash, meth, name, len, is_utf8 ? HVhek_UTF8 : 0, create, NULL, 0 |
c6afe666 | 759 | ); |
760 | if (he) gvp = (GV**)&HeVAL(he); | |
761 | else gvp = NULL; | |
762 | ||
e1a479c5 BB |
763 | if(gvp) { |
764 | topgv = *gvp; | |
0f8d4b5e | 765 | have_gv: |
e1a479c5 BB |
766 | assert(topgv); |
767 | if (SvTYPE(topgv) != SVt_PVGV) | |
55df6700 FC |
768 | { |
769 | if (!name) | |
770 | name = SvPV_nomg(meth, len); | |
04ec7e59 | 771 | gv_init_pvn(topgv, stash, name, len, GV_ADDMULTI|is_utf8); |
55df6700 | 772 | } |
e1a479c5 BB |
773 | if ((cand_cv = GvCV(topgv))) { |
774 | /* If genuine method or valid cache entry, use it */ | |
775 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
776 | return topgv; | |
777 | } | |
778 | else { | |
779 | /* stale cache entry, junk it and move on */ | |
e7881358 | 780 | SvREFCNT_dec_NN(cand_cv); |
c43ae56f DM |
781 | GvCV_set(topgv, NULL); |
782 | cand_cv = NULL; | |
e1a479c5 BB |
783 | GvCVGEN(topgv) = 0; |
784 | } | |
785 | } | |
786 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
787 | /* cache indicates no such method definitively */ | |
788 | return 0; | |
789 | } | |
aae43805 | 790 | else if (stash == cachestash |
b59bf0b2 KW |
791 | && len > 1 /* shortest is uc */ |
792 | && memEQs(hvname, HvNAMELEN_get(stash), "CORE") | |
87566176 | 793 | && S_maybe_add_coresub(aTHX_ NULL,topgv,name,len)) |
0f8d4b5e | 794 | goto have_gv; |
463ee0b2 | 795 | } |
79072805 | 796 | |
aae43805 | 797 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ |
e1a479c5 BB |
798 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
799 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
800 | while (items--) { | |
801 | linear_sv = *linear_svp++; | |
802 | assert(linear_sv); | |
803 | cstash = gv_stashsv(linear_sv, 0); | |
804 | ||
dd69841b | 805 | if (!cstash) { |
448aac91 MM |
806 | if ( ckWARN(WARN_SYNTAX)) { |
807 | if( /* these are loaded from Perl_Gv_AMupdate() one way or another */ | |
808 | ( len && name[0] == '(' ) /* overload.pm related, in particular "()" */ | |
809 | || ( memEQs( name, len, "DESTROY") ) | |
810 | ) { | |
811 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), | |
812 | "Can't locate package %" SVf " for @%" HEKf "::ISA", | |
813 | SVfARG(linear_sv), | |
814 | HEKfARG(HvNAME_HEK(stash))); | |
815 | ||
816 | } else if( memEQs( name, len, "AUTOLOAD") ) { | |
817 | /* gobble this warning */ | |
818 | } else { | |
819 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), | |
820 | "While trying to resolve method call %.*s->%.*s()" | |
320be181 KW |
821 | " can not locate package \"%" SVf "\" yet it is mentioned in @%.*s::ISA" |
822 | " (perhaps you forgot to load \"%" SVf "\"?)", | |
29a3370f N |
823 | (int) hvnamelen, hvname, |
824 | (int) len, name, | |
448aac91 | 825 | SVfARG(linear_sv), |
29a3370f | 826 | (int) hvnamelen, hvname, |
448aac91 MM |
827 | SVfARG(linear_sv)); |
828 | } | |
829 | } | |
e1a479c5 BB |
830 | continue; |
831 | } | |
9607fc9c | 832 | |
e1a479c5 BB |
833 | assert(cstash); |
834 | ||
202cd98a SA |
835 | gvp = (GV**)hv_common( |
836 | cstash, meth, name, len, is_utf8 ? HVhek_UTF8 : 0, HV_FETCH_JUST_SV, NULL, 0 | |
837 | ); | |
0f8d4b5e FC |
838 | if (!gvp) { |
839 | if (len > 1 && HvNAMELEN_get(cstash) == 4) { | |
840 | const char *hvname = HvNAME(cstash); assert(hvname); | |
c8b388b0 | 841 | if (strBEGINs(hvname, "CORE") |
0f8d4b5e | 842 | && (candidate = |
87566176 | 843 | S_maybe_add_coresub(aTHX_ cstash,NULL,name,len) |
0f8d4b5e FC |
844 | )) |
845 | goto have_candidate; | |
846 | } | |
847 | continue; | |
848 | } | |
849 | else candidate = *gvp; | |
850 | have_candidate: | |
e1a479c5 | 851 | assert(candidate); |
04f3bf56 | 852 | if (SvTYPE(candidate) != SVt_PVGV) |
04ec7e59 | 853 | gv_init_pvn(candidate, cstash, name, len, GV_ADDMULTI|is_utf8); |
e1a479c5 BB |
854 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { |
855 | /* | |
856 | * Found real method, cache method in topgv if: | |
857 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
858 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
859 | */ | |
860 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
861 | CV *old_cv = GvCV(topgv); |
862 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 863 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 864 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
865 | GvCVGEN(topgv) = topgen_cmp; |
866 | } | |
867 | return candidate; | |
868 | } | |
869 | } | |
9607fc9c | 870 | |
e1a479c5 BB |
871 | /* Check UNIVERSAL without caching */ |
872 | if(level == 0 || level == -1) { | |
55df6700 FC |
873 | candidate = gv_fetchmeth_internal(NULL, meth, name, len, 1, |
874 | flags &~GV_SUPER); | |
e1a479c5 BB |
875 | if(candidate) { |
876 | cand_cv = GvCV(candidate); | |
877 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
878 | CV *old_cv = GvCV(topgv); |
879 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 880 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 881 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
882 | GvCVGEN(topgv) = topgen_cmp; |
883 | } | |
884 | return candidate; | |
885 | } | |
886 | } | |
887 | ||
888 | if (topgv && GvREFCNT(topgv) == 1) { | |
889 | /* cache the fact that the method is not defined */ | |
890 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
891 | } |
892 | ||
79072805 LW |
893 | return 0; |
894 | } | |
895 | ||
c6afe666 | 896 | GV * |
897 | Perl_gv_fetchmeth_pvn(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) | |
898 | { | |
899 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN; | |
900 | return gv_fetchmeth_internal(stash, NULL, name, len, level, flags); | |
901 | } | |
902 | ||
954c1994 | 903 | /* |
460e5730 FC |
904 | =for apidoc gv_fetchmeth_autoload |
905 | ||
906 | This is the old form of L</gv_fetchmeth_pvn_autoload>, which has no flags | |
907 | parameter. | |
908 | ||
d21989ed | 909 | =for apidoc gv_fetchmeth_sv_autoload |
611c1e95 | 910 | |
d21989ed BF |
911 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes the name string in the form |
912 | of an SV instead of a string/length pair. | |
913 | ||
914 | =cut | |
915 | */ | |
916 | ||
917 | GV * | |
918 | Perl_gv_fetchmeth_sv_autoload(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
919 | { | |
920 | char *namepv; | |
921 | STRLEN namelen; | |
922 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV_AUTOLOAD; | |
923 | namepv = SvPV(namesv, namelen); | |
924 | if (SvUTF8(namesv)) | |
925 | flags |= SVf_UTF8; | |
926 | return gv_fetchmeth_pvn_autoload(stash, namepv, namelen, level, flags); | |
927 | } | |
928 | ||
929 | /* | |
930 | =for apidoc gv_fetchmeth_pv_autoload | |
931 | ||
932 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes a nul-terminated string | |
933 | instead of a string/length pair. | |
934 | ||
935 | =cut | |
936 | */ | |
937 | ||
938 | GV * | |
939 | Perl_gv_fetchmeth_pv_autoload(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
940 | { | |
941 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV_AUTOLOAD; | |
942 | return gv_fetchmeth_pvn_autoload(stash, name, strlen(name), level, flags); | |
943 | } | |
944 | ||
945 | /* | |
946 | =for apidoc gv_fetchmeth_pvn_autoload | |
947 | ||
796b6530 | 948 | Same as C<gv_fetchmeth_pvn()>, but looks for autoloaded subroutines too. |
611c1e95 IZ |
949 | Returns a glob for the subroutine. |
950 | ||
951 | For an autoloaded subroutine without a GV, will create a GV even | |
796b6530 | 952 | if C<level < 0>. For an autoloaded subroutine without a stub, C<GvCV()> |
611c1e95 IZ |
953 | of the result may be zero. |
954 | ||
796b6530 | 955 | Currently, the only significant value for C<flags> is C<SVf_UTF8>. |
d21989ed | 956 | |
611c1e95 IZ |
957 | =cut |
958 | */ | |
959 | ||
960 | GV * | |
d21989ed | 961 | Perl_gv_fetchmeth_pvn_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) |
611c1e95 | 962 | { |
499321d3 | 963 | GV *gv = gv_fetchmeth_pvn(stash, name, len, level, flags); |
611c1e95 | 964 | |
d21989ed | 965 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN_AUTOLOAD; |
7918f24d | 966 | |
611c1e95 | 967 | if (!gv) { |
611c1e95 IZ |
968 | CV *cv; |
969 | GV **gvp; | |
970 | ||
971 | if (!stash) | |
6136c704 | 972 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b | 973 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 | 974 | return NULL; |
d21989ed | 975 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, flags))) |
6136c704 | 976 | return NULL; |
611c1e95 IZ |
977 | cv = GvCV(gv); |
978 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 979 | return NULL; |
611c1e95 IZ |
980 | /* Have an autoload */ |
981 | if (level < 0) /* Cannot do without a stub */ | |
d21989ed | 982 | gv_fetchmeth_pvn(stash, name, len, 0, flags); |
c60dbbc3 BF |
983 | gvp = (GV**)hv_fetch(stash, name, |
984 | (flags & SVf_UTF8) ? -(I32)len : (I32)len, (level >= 0)); | |
611c1e95 | 985 | if (!gvp) |
6136c704 | 986 | return NULL; |
611c1e95 IZ |
987 | return *gvp; |
988 | } | |
989 | return gv; | |
990 | } | |
991 | ||
992 | /* | |
954c1994 GS |
993 | =for apidoc gv_fetchmethod_autoload |
994 | ||
995 | Returns the glob which contains the subroutine to call to invoke the method | |
996 | on the C<stash>. In fact in the presence of autoloading this may be the | |
796b6530 | 997 | glob for "AUTOLOAD". In this case the corresponding variable C<$AUTOLOAD> is |
b267980d | 998 | already setup. |
954c1994 GS |
999 | |
1000 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
1001 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 1002 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 1003 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 1004 | with a non-zero C<autoload> parameter. |
954c1994 | 1005 | |
cec2d7b1 FC |
1006 | These functions grant C<"SUPER"> token |
1007 | as a prefix of the method name. Note | |
954c1994 GS |
1008 | that if you want to keep the returned glob for a long time, you need to |
1009 | check for it being "AUTOLOAD", since at the later time the call may load a | |
796b6530 | 1010 | different subroutine due to C<$AUTOLOAD> changing its value. Use the glob |
cec2d7b1 | 1011 | created as a side effect to do this. |
954c1994 | 1012 | |
cec2d7b1 FC |
1013 | These functions have the same side-effects as C<gv_fetchmeth> with |
1014 | C<level==0>. The warning against passing the GV returned by | |
1015 | C<gv_fetchmeth> to C<call_sv> applies equally to these functions. | |
954c1994 GS |
1016 | |
1017 | =cut | |
1018 | */ | |
1019 | ||
dc848c6f | 1020 | GV * |
864dbfa3 | 1021 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 1022 | { |
547bb267 NC |
1023 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
1024 | ||
256d1bb2 NC |
1025 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
1026 | } | |
1027 | ||
44130a26 BF |
1028 | GV * |
1029 | Perl_gv_fetchmethod_sv_flags(pTHX_ HV *stash, SV *namesv, U32 flags) | |
1030 | { | |
1031 | char *namepv; | |
1032 | STRLEN namelen; | |
1033 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_SV_FLAGS; | |
1034 | namepv = SvPV(namesv, namelen); | |
1035 | if (SvUTF8(namesv)) | |
1036 | flags |= SVf_UTF8; | |
1037 | return gv_fetchmethod_pvn_flags(stash, namepv, namelen, flags); | |
1038 | } | |
1039 | ||
1040 | GV * | |
1041 | Perl_gv_fetchmethod_pv_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
1042 | { | |
1043 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PV_FLAGS; | |
1044 | return gv_fetchmethod_pvn_flags(stash, name, strlen(name), flags); | |
1045 | } | |
1046 | ||
256d1bb2 | 1047 | GV * |
44130a26 | 1048 | Perl_gv_fetchmethod_pvn_flags(pTHX_ HV *stash, const char *name, const STRLEN len, U32 flags) |
256d1bb2 | 1049 | { |
65308f87 YO |
1050 | const char * const origname = name; |
1051 | const char * const name_end = name + len; | |
e2cace1e | 1052 | const char *last_separator = NULL; |
a0d0e21e | 1053 | GV* gv; |
0dae17bd | 1054 | HV* ostash = stash; |
ad64d0ec | 1055 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 NC |
1056 | const U32 autoload = flags & GV_AUTOLOAD; |
1057 | const U32 do_croak = flags & GV_CROAK; | |
14d1dfbd | 1058 | const U32 is_utf8 = flags & SVf_UTF8; |
0dae17bd | 1059 | |
44130a26 | 1060 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PVN_FLAGS; |
7918f24d | 1061 | |
eff494dd | 1062 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 | 1063 | stash = NULL; |
c9bf4021 | 1064 | else { |
e2cace1e | 1065 | /* The only way stash can become NULL later on is if last_separator is set, |
c9bf4021 NC |
1066 | which in turn means that there is no need for a SVt_PVHV case |
1067 | the error reporting code. */ | |
1068 | } | |
b267980d | 1069 | |
cfb73676 YO |
1070 | { |
1071 | /* check if the method name is fully qualified or | |
1072 | * not, and separate the package name from the actual | |
1073 | * method name. | |
1074 | * | |
1075 | * leaves last_separator pointing to the beginning of the | |
1076 | * last package separator (either ' or ::) or 0 | |
1077 | * if none was found. | |
1078 | * | |
1079 | * leaves name pointing at the beginning of the | |
1080 | * method name. | |
1081 | */ | |
1082 | const char *name_cursor = name; | |
1083 | const char * const name_em1 = name_end - 1; /* name_end minus 1 */ | |
1084 | for (name_cursor = name; name_cursor < name_end ; name_cursor++) { | |
1085 | if (*name_cursor == '\'') { | |
1086 | last_separator = name_cursor; | |
1087 | name = name_cursor + 1; | |
1088 | } | |
1089 | else if (name_cursor < name_em1 && *name_cursor == ':' && name_cursor[1] == ':') { | |
1090 | last_separator = name_cursor++; | |
1091 | name = name_cursor + 1; | |
1092 | } | |
1093 | } | |
a0d0e21e | 1094 | } |
cfb73676 YO |
1095 | |
1096 | /* did we find a separator? */ | |
e2cace1e | 1097 | if (last_separator) { |
9b7f107c YO |
1098 | STRLEN sep_len= last_separator - origname; |
1099 | if ( memEQs(origname, sep_len, "SUPER")) { | |
9607fc9c | 1100 | /* ->SUPER::method should really be looked up in original stash */ |
aae43805 FC |
1101 | stash = CopSTASH(PL_curcop); |
1102 | flags |= GV_SUPER; | |
cea2e8a9 | 1103 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
0308a534 | 1104 | origname, HvENAME_get(stash), name) ); |
4633a7c4 | 1105 | } |
47324b4e KW |
1106 | else if ( sep_len >= 7 && |
1107 | strBEGINs(last_separator - 7, "::SUPER")) { | |
aae43805 | 1108 | /* don't autovifify if ->NoSuchStash::SUPER::method */ |
9b7f107c | 1109 | stash = gv_stashpvn(origname, sep_len - 7, is_utf8); |
aae43805 FC |
1110 | if (stash) flags |= GV_SUPER; |
1111 | } | |
e189a56d | 1112 | else { |
af09ea45 | 1113 | /* don't autovifify if ->NoSuchStash::method */ |
9b7f107c | 1114 | stash = gv_stashpvn(origname, sep_len, is_utf8); |
e189a56d | 1115 | } |
0dae17bd | 1116 | ostash = stash; |
4633a7c4 LW |
1117 | } |
1118 | ||
65308f87 | 1119 | gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags); |
a0d0e21e | 1120 | if (!gv) { |
7da9d78d AB |
1121 | /* This is the special case that exempts Foo->import and |
1122 | Foo->unimport from being an error even if there's no | |
1123 | import/unimport subroutine */ | |
0740a29d Z |
1124 | if (strEQ(name,"import") || strEQ(name,"unimport")) { |
1125 | gv = (GV*)sv_2mortal((SV*)newCONSTSUB_flags(NULL, | |
1126 | NULL, 0, 0, NULL)); | |
1127 | } else if (autoload) | |
c8416c26 | 1128 | gv = gv_autoload_pvn( |
65308f87 | 1129 | ostash, name, name_end - name, GV_AUTOLOAD_ISMETHOD|flags |
c8416c26 | 1130 | ); |
256d1bb2 NC |
1131 | if (!gv && do_croak) { |
1132 | /* Right now this is exclusively for the benefit of S_method_common | |
1133 | in pp_hot.c */ | |
1134 | if (stash) { | |
15e6cdd9 DG |
1135 | /* If we can't find an IO::File method, it might be a call on |
1136 | * a filehandle. If IO:File has not been loaded, try to | |
1137 | * require it first instead of croaking */ | |
1138 | const char *stash_name = HvNAME_get(stash); | |
31b05a0f FR |
1139 | if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File") |
1140 | && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL, | |
1141 | STR_WITH_LEN("IO/File.pm"), 0, | |
1142 | HV_FETCH_ISEXISTS, NULL, 0) | |
15e6cdd9 | 1143 | ) { |
31b05a0f | 1144 | require_pv("IO/File.pm"); |
65308f87 | 1145 | gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags); |
15e6cdd9 DG |
1146 | if (gv) |
1147 | return gv; | |
1148 | } | |
256d1bb2 | 1149 | Perl_croak(aTHX_ |
147e3846 KW |
1150 | "Can't locate object method \"%" UTF8f |
1151 | "\" via package \"%" HEKf "\"", | |
65308f87 | 1152 | UTF8fARG(is_utf8, name_end - name, name), |
d0c0e7dd | 1153 | HEKfARG(HvNAME_HEK(stash))); |
256d1bb2 NC |
1154 | } |
1155 | else { | |
ecad31f0 | 1156 | SV* packnamesv; |
256d1bb2 | 1157 | |
e2cace1e YO |
1158 | if (last_separator) { |
1159 | packnamesv = newSVpvn_flags(origname, last_separator - origname, | |
ecad31f0 | 1160 | SVs_TEMP | is_utf8); |
256d1bb2 | 1161 | } else { |
017c5e4e | 1162 | packnamesv = error_report; |
256d1bb2 NC |
1163 | } |
1164 | ||
1165 | Perl_croak(aTHX_ | |
147e3846 KW |
1166 | "Can't locate object method \"%" UTF8f |
1167 | "\" via package \"%" SVf "\"" | |
1168 | " (perhaps you forgot to load \"%" SVf "\"?)", | |
65308f87 | 1169 | UTF8fARG(is_utf8, name_end - name, name), |
ecad31f0 | 1170 | SVfARG(packnamesv), SVfARG(packnamesv)); |
256d1bb2 NC |
1171 | } |
1172 | } | |
463ee0b2 | 1173 | } |
dc848c6f | 1174 | else if (autoload) { |
9d4ba2ae | 1175 | CV* const cv = GvCV(gv); |
09280a33 CS |
1176 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
1177 | GV* stubgv; | |
1178 | GV* autogv; | |
1179 | ||
0c028dca | 1180 | if (CvANON(cv) || CvLEXICAL(cv)) |
09280a33 CS |
1181 | stubgv = gv; |
1182 | else { | |
1183 | stubgv = CvGV(cv); | |
1184 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
1185 | stubgv = gv; | |
1186 | } | |
c8416c26 BF |
1187 | autogv = gv_autoload_pvn(GvSTASH(stubgv), |
1188 | GvNAME(stubgv), GvNAMELEN(stubgv), | |
1189 | GV_AUTOLOAD_ISMETHOD | |
1190 | | (GvNAMEUTF8(stubgv) ? SVf_UTF8 : 0)); | |
dc848c6f | 1191 | if (autogv) |
1192 | gv = autogv; | |
1193 | } | |
1194 | } | |
44a8e56a | 1195 | |
1196 | return gv; | |
1197 | } | |
1198 | ||
1199 | GV* | |
0eeb01b9 | 1200 | Perl_gv_autoload_sv(pTHX_ HV *stash, SV* namesv, U32 flags) |
5fba3c91 BF |
1201 | { |
1202 | char *namepv; | |
1203 | STRLEN namelen; | |
0fe84f7c | 1204 | PERL_ARGS_ASSERT_GV_AUTOLOAD_SV; |
5fba3c91 BF |
1205 | namepv = SvPV(namesv, namelen); |
1206 | if (SvUTF8(namesv)) | |
1207 | flags |= SVf_UTF8; | |
0eeb01b9 | 1208 | return gv_autoload_pvn(stash, namepv, namelen, flags); |
5fba3c91 BF |
1209 | } |
1210 | ||
1211 | GV* | |
0eeb01b9 | 1212 | Perl_gv_autoload_pv(pTHX_ HV *stash, const char *namepv, U32 flags) |
5fba3c91 | 1213 | { |
0fe84f7c | 1214 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PV; |
0eeb01b9 | 1215 | return gv_autoload_pvn(stash, namepv, strlen(namepv), flags); |
5fba3c91 BF |
1216 | } |
1217 | ||
1218 | GV* | |
0eeb01b9 | 1219 | Perl_gv_autoload_pvn(pTHX_ HV *stash, const char *name, STRLEN len, U32 flags) |
44a8e56a | 1220 | { |
44a8e56a | 1221 | GV* gv; |
1222 | CV* cv; | |
1223 | HV* varstash; | |
1224 | GV* vargv; | |
1225 | SV* varsv; | |
c8416c26 BF |
1226 | SV *packname = NULL; |
1227 | U32 is_utf8 = flags & SVf_UTF8 ? SVf_UTF8 : 0; | |
44a8e56a | 1228 | |
0fe84f7c | 1229 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PVN; |
7918f24d | 1230 | |
7edbdc6b | 1231 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c | 1232 | return NULL; |
0dae17bd GS |
1233 | if (stash) { |
1234 | if (SvTYPE(stash) < SVt_PVHV) { | |
c8416c26 BF |
1235 | STRLEN packname_len = 0; |
1236 | const char * const packname_ptr = SvPV_const(MUTABLE_SV(stash), packname_len); | |
1237 | packname = newSVpvn_flags(packname_ptr, packname_len, | |
1238 | SVs_TEMP | SvUTF8(stash)); | |
5c284bb0 | 1239 | stash = NULL; |
0dae17bd | 1240 | } |
c8416c26 BF |
1241 | else |
1242 | packname = sv_2mortal(newSVhek(HvNAME_HEK(stash))); | |
aae43805 | 1243 | if (flags & GV_SUPER) sv_catpvs(packname, "::SUPER"); |
0dae17bd | 1244 | } |
257dc59d FC |
1245 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, |
1246 | is_utf8 | (flags & GV_SUPER)))) | |
a0714e2c | 1247 | return NULL; |
dc848c6f | 1248 | cv = GvCV(gv); |
1249 | ||
adb5a9ae | 1250 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 1251 | return NULL; |
ed850460 | 1252 | |
dc848c6f | 1253 | /* |
64278e8c | 1254 | * Inheriting AUTOLOAD for non-methods no longer works |
dc848c6f | 1255 | */ |
0eeb01b9 FC |
1256 | if ( |
1257 | !(flags & GV_AUTOLOAD_ISMETHOD) | |
1258 | && (GvCVGEN(gv) || GvSTASH(gv) != stash) | |
041457d9 | 1259 | ) |
64278e8c A |
1260 | Perl_croak(aTHX_ "Use of inherited AUTOLOAD for non-method %" SVf |
1261 | "::%" UTF8f "() is no longer allowed", | |
ecad31f0 | 1262 | SVfARG(packname), |
b17a0679 | 1263 | UTF8fARG(is_utf8, len, name)); |
44a8e56a | 1264 | |
aed2304a | 1265 | if (CvISXSUB(cv)) { |
bb619f37 FC |
1266 | /* Instead of forcing the XSUB do another lookup for $AUTOLOAD |
1267 | * and split that value on the last '::', pass along the same data | |
1268 | * via the SvPVX field in the CV, and the stash in CvSTASH. | |
8fa6a409 FC |
1269 | * |
1270 | * Due to an unfortunate accident of history, the SvPVX field | |
e1fa07e3 | 1271 | * serves two purposes. It is also used for the subroutine's pro- |
8fa6a409 FC |
1272 | * type. Since SvPVX has been documented as returning the sub name |
1273 | * for a long time, but not as returning the prototype, we have | |
1274 | * to preserve the SvPVX AUTOLOAD behaviour and put the prototype | |
1275 | * elsewhere. | |
1276 | * | |
1277 | * We put the prototype in the same allocated buffer, but after | |
1278 | * the sub name. The SvPOK flag indicates the presence of a proto- | |
1279 | * type. The CvAUTOLOAD flag indicates the presence of a sub name. | |
1280 | * If both flags are on, then SvLEN is used to indicate the end of | |
1281 | * the prototype (artificially lower than what is actually allo- | |
1282 | * cated), at the risk of having to reallocate a few bytes unneces- | |
1283 | * sarily--but that should happen very rarely, if ever. | |
1284 | * | |
1285 | * We use SvUTF8 for both prototypes and sub names, so if one is | |
1286 | * UTF8, the other must be upgraded. | |
adb5a9ae | 1287 | */ |
c68d9564 | 1288 | CvSTASH_set(cv, stash); |
8fa6a409 | 1289 | if (SvPOK(cv)) { /* Ouch! */ |
e7881358 | 1290 | SV * const tmpsv = newSVpvn_flags(name, len, is_utf8); |
8fa6a409 FC |
1291 | STRLEN ulen; |
1292 | const char *proto = CvPROTO(cv); | |
1293 | assert(proto); | |
1294 | if (SvUTF8(cv)) | |
1295 | sv_utf8_upgrade_flags_grow(tmpsv, 0, CvPROTOLEN(cv) + 2); | |
1296 | ulen = SvCUR(tmpsv); | |
2324bdb9 | 1297 | SvCUR_set(tmpsv, SvCUR(tmpsv) + 1); /* include null in string */ |
8fa6a409 FC |
1298 | sv_catpvn_flags( |
1299 | tmpsv, proto, CvPROTOLEN(cv), SV_CATBYTES*!SvUTF8(cv) | |
1300 | ); | |
1301 | SvTEMP_on(tmpsv); /* Allow theft */ | |
1302 | sv_setsv_nomg((SV *)cv, tmpsv); | |
05b525f4 | 1303 | SvTEMP_off(tmpsv); |
e7881358 | 1304 | SvREFCNT_dec_NN(tmpsv); |
59c3c222 | 1305 | SvLEN_set(cv, SvCUR(cv) + 1); |
2324bdb9 | 1306 | SvCUR_set(cv, ulen); |
8fa6a409 FC |
1307 | } |
1308 | else { | |
1309 | sv_setpvn((SV *)cv, name, len); | |
1310 | SvPOK_off(cv); | |
1311 | if (is_utf8) | |
c8416c26 | 1312 | SvUTF8_on(cv); |
8fa6a409 FC |
1313 | else SvUTF8_off(cv); |
1314 | } | |
1315 | CvAUTOLOAD_on(cv); | |
adb5a9ae | 1316 | } |
adb5a9ae | 1317 | |
44a8e56a | 1318 | /* |
1319 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
1320 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
1321 | * use that, but for lack of anything better we will use the sub's | |
1322 | * original package to look up $AUTOLOAD. | |
1323 | */ | |
18691622 | 1324 | varstash = CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv)); |
5c7983e5 | 1325 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
1326 | ENTER; |
1327 | ||
c69033f2 | 1328 | if (!isGV(vargv)) { |
04ec7e59 | 1329 | gv_init_pvn(vargv, varstash, S_autoload, S_autolen, 0); |
c69033f2 | 1330 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 1331 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
1332 | #endif |
1333 | } | |
3d35f11b | 1334 | LEAVE; |
e203899d | 1335 | varsv = GvSVn(vargv); |
4bac9ae4 CS |
1336 | SvTAINTED_off(varsv); /* previous $AUTOLOAD taint is obsolete */ |
1337 | /* XXX: this process is not careful to avoid extra magic gets and sets; tied $AUTOLOAD will get noise */ | |
c8416c26 | 1338 | sv_setsv(varsv, packname); |
396482e1 | 1339 | sv_catpvs(varsv, "::"); |
d40bf27b NC |
1340 | /* Ensure SvSETMAGIC() is called if necessary. In particular, to clear |
1341 | tainting if $FOO::AUTOLOAD was previously tainted, but is not now. */ | |
61a9130e FC |
1342 | sv_catpvn_flags( |
1343 | varsv, name, len, | |
5bcd1ef4 | 1344 | SV_SMAGIC|(is_utf8 ? SV_CATUTF8 : SV_CATBYTES) |
61a9130e | 1345 | ); |
c8416c26 BF |
1346 | if (is_utf8) |
1347 | SvUTF8_on(varsv); | |
a0d0e21e LW |
1348 | return gv; |
1349 | } | |
1350 | ||
44a2ac75 YO |
1351 | |
1352 | /* require_tie_mod() internal routine for requiring a module | |
486ec47a | 1353 | * that implements the logic of automatic ties like %! and %- |
e94ea821 FC |
1354 | * It loads the module and then calls the _tie_it subroutine |
1355 | * with the passed gv as an argument. | |
44a2ac75 YO |
1356 | * |
1357 | * The "gv" parameter should be the glob. | |
ee33cc1a | 1358 | * "varname" holds the 1-char name of the var, used for error messages. |
45cbc99a | 1359 | * "namesv" holds the module name. Its refcount will be decremented. |
45cbc99a | 1360 | * "flags": if flag & 1 then save the scalar before loading. |
44a2ac75 YO |
1361 | * For the protection of $! to work (it is set by this routine) |
1362 | * the sv slot must already be magicalized. | |
d2c93421 | 1363 | */ |
e94ea821 | 1364 | STATIC void |
ee33cc1a | 1365 | S_require_tie_mod(pTHX_ GV *gv, const char varname, const char * name, |
a1683482 | 1366 | STRLEN len, const U32 flags) |
d2c93421 | 1367 | { |
e94ea821 | 1368 | const SV * const target = varname == '[' ? GvSV(gv) : (SV *)GvHV(gv); |
45cbc99a | 1369 | |
7918f24d NC |
1370 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
1371 | ||
e94ea821 FC |
1372 | /* If it is not tied */ |
1373 | if (!target || !SvRMAGICAL(target) | |
1374 | || !mg_find(target, | |
1375 | varname == '[' ? PERL_MAGIC_tiedscalar : PERL_MAGIC_tied)) | |
1376 | { | |
1377 | HV *stash; | |
1378 | GV **gvp; | |
1379 | dSP; | |
1380 | ||
655f5b26 | 1381 | PUSHSTACKi(PERLSI_MAGIC); |
e94ea821 | 1382 | ENTER; |
e94ea821 | 1383 | |
6881372e FC |
1384 | #define GET_HV_FETCH_TIE_FUNC \ |
1385 | ( (gvp = (GV **)hv_fetchs(stash, "_tie_it", 0)) \ | |
1386 | && *gvp \ | |
1387 | && ( (isGV(*gvp) && GvCV(*gvp)) \ | |
1388 | || (SvROK(*gvp) && SvTYPE(SvRV(*gvp)) == SVt_PVCV) ) \ | |
1389 | ) | |
e94ea821 FC |
1390 | |
1391 | /* Load the module if it is not loaded. */ | |
360cebfd | 1392 | if (!(stash = gv_stashpvn(name, len, 0)) |
6881372e | 1393 | || ! GET_HV_FETCH_TIE_FUNC) |
e94ea821 | 1394 | { |
360cebfd | 1395 | SV * const module = newSVpvn(name, len); |
b82b06b8 | 1396 | const char type = varname == '[' ? '$' : '%'; |
44a2ac75 | 1397 | if ( flags & 1 ) |
45cbc99a | 1398 | save_scalar(gv); |
5b2ef88e | 1399 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
61bac25c | 1400 | assert(sp == PL_stack_sp); |
360cebfd | 1401 | stash = gv_stashpvn(name, len, 0); |
44a2ac75 | 1402 | if (!stash) |
360cebfd FC |
1403 | Perl_croak(aTHX_ "panic: Can't use %c%c because %s is not available", |
1404 | type, varname, name); | |
6881372e | 1405 | else if (! GET_HV_FETCH_TIE_FUNC) |
360cebfd FC |
1406 | Perl_croak(aTHX_ "panic: Can't use %c%c because %s does not define _tie_it", |
1407 | type, varname, name); | |
e94ea821 FC |
1408 | } |
1409 | /* Now call the tie function. It should be in *gvp. */ | |
6881372e | 1410 | assert(gvp); assert(*gvp); |
e94ea821 FC |
1411 | PUSHMARK(SP); |
1412 | XPUSHs((SV *)gv); | |
1413 | PUTBACK; | |
1414 | call_sv((SV *)*gvp, G_VOID|G_DISCARD); | |
1415 | LEAVE; | |
655f5b26 | 1416 | POPSTACK; |
d2c93421 RH |
1417 | } |
1418 | } | |
1419 | ||
7c719134 YO |
1420 | /* add a require_tie_mod_s - the _s suffix is similar to pvs type suffixes, |
1421 | * IOW it means we do STR_WITH_LEN() ourselves and the user should pass in | |
1422 | * a true string WITHOUT a len. | |
1423 | */ | |
1424 | #define require_tie_mod_s(gv, varname, name, flags) \ | |
1425 | S_require_tie_mod(aTHX_ gv, varname, STR_WITH_LEN(name), flags) | |
1426 | ||
954c1994 GS |
1427 | /* |
1428 | =for apidoc gv_stashpv | |
1429 | ||
da51bb9b | 1430 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 1431 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
1432 | |
1433 | =cut | |
1434 | */ | |
1435 | ||
a0d0e21e | 1436 | HV* |
864dbfa3 | 1437 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 1438 | { |
7918f24d | 1439 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 1440 | return gv_stashpvn(name, strlen(name), create); |
1441 | } | |
1442 | ||
bc96cb06 SH |
1443 | /* |
1444 | =for apidoc gv_stashpvn | |
1445 | ||
da51bb9b NC |
1446 | Returns a pointer to the stash for a specified package. The C<namelen> |
1447 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
1448 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
1449 | created if it does not already exist. If the package does not exist and | |
796b6530 | 1450 | C<flags> is 0 (or any other setting that does not create packages) then C<NULL> |
da51bb9b NC |
1451 | is returned. |
1452 | ||
566a4718 YO |
1453 | Flags may be one of: |
1454 | ||
1455 | GV_ADD | |
1456 | SVf_UTF8 | |
1457 | GV_NOADD_NOINIT | |
1458 | GV_NOINIT | |
1459 | GV_NOEXPAND | |
1460 | GV_ADDMG | |
1461 | ||
796b6530 | 1462 | The most important of which are probably C<GV_ADD> and C<SVf_UTF8>. |
bc96cb06 | 1463 | |
808724c8 | 1464 | Note, use of C<gv_stashsv> instead of C<gv_stashpvn> where possible is strongly |
1465 | recommended for performance reasons. | |
1466 | ||
4f8d487a | 1467 | =for apidoc Amnh||GV_ADD |
5af38e47 KW |
1468 | =for apidoc Amnh||GV_NOADD_NOINIT |
1469 | =for apidoc Amnh||GV_NOINIT | |
1470 | =for apidoc Amnh||GV_NOEXPAND | |
1471 | =for apidoc Amnh||GV_ADDMG | |
1472 | =for apidoc Amnh||SVf_UTF8 | |
4f8d487a | 1473 | |
bc96cb06 SH |
1474 | =cut |
1475 | */ | |
1476 | ||
0eadbdad YO |
1477 | /* |
1478 | gv_stashpvn_internal | |
1479 | ||
1480 | Perform the internal bits of gv_stashsvpvn_cached. You could think of this | |
1481 | as being one half of the logic. Not to be called except from gv_stashsvpvn_cached(). | |
1482 | ||
1483 | */ | |
1484 | ||
4e7ebec5 | 1485 | PERL_STATIC_INLINE HV* |
0eadbdad | 1486 | S_gv_stashpvn_internal(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 1487 | { |
0cea0058 | 1488 | char smallbuf[128]; |
46fc3d4c | 1489 | char *tmpbuf; |
a0d0e21e LW |
1490 | HV *stash; |
1491 | GV *tmpgv; | |
add0ecde | 1492 | U32 tmplen = namelen + 2; |
dc437b57 | 1493 | |
0eadbdad | 1494 | PERL_ARGS_ASSERT_GV_STASHPVN_INTERNAL; |
7918f24d | 1495 | |
add0ecde | 1496 | if (tmplen <= sizeof smallbuf) |
46fc3d4c | 1497 | tmpbuf = smallbuf; |
1498 | else | |
add0ecde VP |
1499 | Newx(tmpbuf, tmplen, char); |
1500 | Copy(name, tmpbuf, namelen, char); | |
1501 | tmpbuf[namelen] = ':'; | |
1502 | tmpbuf[namelen+1] = ':'; | |
1503 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); | |
46fc3d4c | 1504 | if (tmpbuf != smallbuf) |
1505 | Safefree(tmpbuf); | |
d2fcb1d6 | 1506 | if (!tmpgv || !isGV_with_GP(tmpgv)) |
da51bb9b | 1507 | return NULL; |
a0d0e21e | 1508 | stash = GvHV(tmpgv); |
1f656fcf | 1509 | if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL; |
9efb5c72 | 1510 | assert(stash); |
1f656fcf | 1511 | if (!HvNAME_get(stash)) { |
0be4d16f | 1512 | hv_name_set(stash, name, namelen, flags & SVf_UTF8 ? SVf_UTF8 : 0 ); |
1f656fcf FC |
1513 | |
1514 | /* FIXME: This is a repeat of logic in gv_fetchpvn_flags */ | |
1515 | /* If the containing stash has multiple effective | |
1516 | names, see that this one gets them, too. */ | |
1517 | if (HvAUX(GvSTASH(tmpgv))->xhv_name_count) | |
1518 | mro_package_moved(stash, NULL, tmpgv, 1); | |
1519 | } | |
a0d0e21e | 1520 | return stash; |
463ee0b2 LW |
1521 | } |
1522 | ||
808724c8 | 1523 | /* |
1524 | gv_stashsvpvn_cached | |
1525 | ||
1526 | Returns a pointer to the stash for a specified package, possibly | |
b8c7ef84 | 1527 | cached. Implements both C<L</gv_stashpvn>> and C<L</gv_stashsv>>. |
808724c8 | 1528 | |
b8c7ef84 | 1529 | Requires one of either C<namesv> or C<namepv> to be non-null. |
808724c8 | 1530 | |
b8c7ef84 | 1531 | See C<L</gv_stashpvn>> for details on C<flags>. |
808724c8 | 1532 | |
1533 | Note the sv interface is strongly preferred for performance reasons. | |
1534 | ||
1535 | */ | |
1536 | ||
1537 | #define PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED \ | |
1538 | assert(namesv || name) | |
1539 | ||
c4b6b96d SA |
1540 | HV* |
1541 | Perl_gv_stashsvpvn_cached(pTHX_ SV *namesv, const char *name, U32 namelen, I32 flags) | |
4e7ebec5 | 1542 | { |
1543 | HV* stash; | |
808724c8 | 1544 | HE* he; |
1545 | ||
1546 | PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED; | |
1547 | ||
1548 | he = (HE *)hv_common( | |
1549 | PL_stashcache, namesv, name, namelen, | |
4e7ebec5 | 1550 | (flags & SVf_UTF8) ? HVhek_UTF8 : 0, 0, NULL, 0 |
1551 | ); | |
808724c8 | 1552 | |
78e4f28f DM |
1553 | if (he) { |
1554 | SV *sv = HeVAL(he); | |
1555 | HV *hv; | |
1556 | assert(SvIOK(sv)); | |
1557 | hv = INT2PTR(HV*, SvIVX(sv)); | |
1558 | assert(SvTYPE(hv) == SVt_PVHV); | |
1559 | return hv; | |
1560 | } | |
d283e876 | 1561 | else if (flags & GV_CACHE_ONLY) return NULL; |
4e7ebec5 | 1562 | |
808724c8 | 1563 | if (namesv) { |
1564 | if (SvOK(namesv)) { /* prevent double uninit warning */ | |
1565 | STRLEN len; | |
1566 | name = SvPV_const(namesv, len); | |
1567 | namelen = len; | |
1568 | flags |= SvUTF8(namesv); | |
1569 | } else { | |
1570 | name = ""; namelen = 0; | |
1571 | } | |
1572 | } | |
0eadbdad YO |
1573 | stash = gv_stashpvn_internal(name, namelen, flags); |
1574 | ||
4e7ebec5 | 1575 | if (stash && namelen) { |
1576 | SV* const ref = newSViv(PTR2IV(stash)); | |
0eadbdad | 1577 | (void)hv_store(PL_stashcache, name, |
4e7ebec5 | 1578 | (flags & SVf_UTF8) ? -(I32)namelen : (I32)namelen, ref, 0); |
1579 | } | |
808724c8 | 1580 | |
4e7ebec5 | 1581 | return stash; |
1582 | } | |
1583 | ||
808724c8 | 1584 | HV* |
1585 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) | |
1586 | { | |
1587 | PERL_ARGS_ASSERT_GV_STASHPVN; | |
1588 | return gv_stashsvpvn_cached(NULL, name, namelen, flags); | |
1589 | } | |
1590 | ||
954c1994 GS |
1591 | /* |
1592 | =for apidoc gv_stashsv | |
1593 | ||
fbe13c60 KW |
1594 | Returns a pointer to the stash for a specified package. See |
1595 | C<L</gv_stashpvn>>. | |
954c1994 | 1596 | |
fbe13c60 KW |
1597 | Note this interface is strongly preferred over C<gv_stashpvn> for performance |
1598 | reasons. | |
808724c8 | 1599 | |
954c1994 GS |
1600 | =cut |
1601 | */ | |
1602 | ||
a0d0e21e | 1603 | HV* |
da51bb9b | 1604 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 1605 | { |
7918f24d | 1606 | PERL_ARGS_ASSERT_GV_STASHSV; |
808724c8 | 1607 | return gv_stashsvpvn_cached(sv, NULL, 0, flags); |
a0d0e21e | 1608 | } |
463ee0b2 | 1609 | GV * |
3752a9fe | 1610 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 flags, const svtype sv_type) { |
7918f24d | 1611 | PERL_ARGS_ASSERT_GV_FETCHPV; |
3752a9fe | 1612 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), flags, sv_type); |
7a5fd60d NC |
1613 | } |
1614 | ||
1615 | GV * | |
fe9845cc | 1616 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 1617 | STRLEN len; |
77cb3b01 FC |
1618 | const char * const nambeg = |
1619 | SvPV_flags_const(name, len, flags & GV_NO_SVGMAGIC ? 0 : SV_GMAGIC); | |
7918f24d | 1620 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
1621 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
1622 | } | |
1623 | ||
90aeefb4 | 1624 | PERL_STATIC_INLINE void |
290a1700 | 1625 | S_gv_magicalize_isa(pTHX_ GV *gv) |
ad7cce9f FR |
1626 | { |
1627 | AV* av; | |
1628 | ||
1629 | PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA; | |
1630 | ||
1631 | av = GvAVn(gv); | |
1632 | GvMULTI_on(gv); | |
1633 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, | |
1634 | NULL, 0); | |
ad7cce9f FR |
1635 | } |
1636 | ||
90aeefb4 BF |
1637 | /* This function grabs name and tries to split a stash and glob |
1638 | * from its contents. TODO better description, comments | |
1639 | * | |
1640 | * If the function returns TRUE and 'name == name_end', then | |
1641 | * 'gv' can be directly returned to the caller of gv_fetchpvn_flags | |
1642 | */ | |
1643 | PERL_STATIC_INLINE bool | |
1644 | S_parse_gv_stash_name(pTHX_ HV **stash, GV **gv, const char **name, | |
1645 | STRLEN *len, const char *nambeg, STRLEN full_len, | |
1646 | const U32 is_utf8, const I32 add) | |
1647 | { | |
8c573bee | 1648 | char *tmpfullbuf = NULL; /* only malloc one big chunk of memory when the smallbuff is not large enough */ |
90aeefb4 BF |
1649 | const char *name_cursor; |
1650 | const char *const name_end = nambeg + full_len; | |
1651 | const char *const name_em1 = name_end - 1; | |
8c573bee | 1652 | char smallbuf[64]; /* small buffer to avoid a malloc when possible */ |
90aeefb4 BF |
1653 | |
1654 | PERL_ARGS_ASSERT_PARSE_GV_STASH_NAME; | |
1655 | ||
7a207065 KW |
1656 | if ( full_len > 2 |
1657 | && **name == '*' | |
1658 | && isIDFIRST_lazy_if_safe(*name + 1, name_end, is_utf8)) | |
1659 | { | |
90aeefb4 BF |
1660 | /* accidental stringify on a GV? */ |
1661 | (*name)++; | |
1662 | } | |
1663 | ||
1664 | for (name_cursor = *name; name_cursor < name_end; name_cursor++) { | |
1665 | if (name_cursor < name_em1 && | |
1666 | ((*name_cursor == ':' && name_cursor[1] == ':') | |
1667 | || *name_cursor == '\'')) | |
1668 | { | |
1669 | if (!*stash) | |
1670 | *stash = PL_defstash; | |
1671 | if (!*stash || !SvREFCNT(*stash)) /* symbol table under destruction */ | |
657ed7c1 | 1672 | goto notok; |
90aeefb4 BF |
1673 | |
1674 | *len = name_cursor - *name; | |
1675 | if (name_cursor > nambeg) { /* Skip for initial :: or ' */ | |
1676 | const char *key; | |
1677 | GV**gvp; | |
1678 | if (*name_cursor == ':') { | |
1679 | key = *name; | |
1680 | *len += 2; | |
1681 | } | |
f8ac814f | 1682 | else { /* using ' for package separator */ |
8c573bee N |
1683 | /* use our pre-allocated buffer when possible to save a malloc */ |
1684 | char *tmpbuf; | |
1685 | if ( *len+2 <= sizeof smallbuf) | |
1686 | tmpbuf = smallbuf; | |
1687 | else { | |
1688 | /* only malloc once if needed */ | |
1689 | if (tmpfullbuf == NULL) /* only malloc&free once, a little more than needed */ | |
1690 | Newx(tmpfullbuf, full_len+2, char); | |
1691 | tmpbuf = tmpfullbuf; | |
1692 | } | |
90aeefb4 BF |
1693 | Copy(*name, tmpbuf, *len, char); |
1694 | tmpbuf[(*len)++] = ':'; | |
1695 | tmpbuf[(*len)++] = ':'; | |
1696 | key = tmpbuf; | |
1697 | } | |
c161da64 | 1698 | gvp = (GV**)hv_fetch(*stash, key, is_utf8 ? -((I32)*len) : (I32)*len, add); |
90aeefb4 | 1699 | *gv = gvp ? *gvp : NULL; |
f8ac814f | 1700 | if (!*gv || *gv == (const GV *)&PL_sv_undef) { |
657ed7c1 | 1701 | goto notok; |
f8ac814f N |
1702 | } |
1703 | /* here we know that *gv && *gv != &PL_sv_undef */ | |
1704 | if (SvTYPE(*gv) != SVt_PVGV) | |
1705 | gv_init_pvn(*gv, *stash, key, *len, (add & GV_ADDMULTI)|is_utf8); | |
1706 | else | |
1707 | GvMULTI_on(*gv); | |
90aeefb4 BF |
1708 | |
1709 | if (!(*stash = GvHV(*gv))) { | |
1710 | *stash = GvHV(*gv) = newHV(); | |
1711 | if (!HvNAME_get(*stash)) { | |
1712 | if (GvSTASH(*gv) == PL_defstash && *len == 6 | |
c8b388b0 | 1713 | && strBEGINs(*name, "CORE")) |
4c4f3c46 | 1714 | hv_name_sets(*stash, "CORE", 0); |
90aeefb4 BF |
1715 | else |
1716 | hv_name_set( | |
1717 | *stash, nambeg, name_cursor-nambeg, is_utf8 | |
1718 | ); | |
1719 | /* If the containing stash has multiple effective | |
1720 | names, see that this one gets them, too. */ | |
1721 | if (HvAUX(GvSTASH(*gv))->xhv_name_count) | |
1722 | mro_package_moved(*stash, NULL, *gv, 1); | |
1723 | } | |
1724 | } | |
1725 | else if (!HvNAME_get(*stash)) | |
1726 | hv_name_set(*stash, nambeg, name_cursor - nambeg, is_utf8); | |
1727 | } | |
1728 | ||
1729 | if (*name_cursor == ':') | |
1730 | name_cursor++; | |
1731 | *name = name_cursor+1; | |
1732 | if (*name == name_end) { | |
120921ac Z |
1733 | if (!*gv) { |
1734 | *gv = MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); | |
1735 | if (SvTYPE(*gv) != SVt_PVGV) { | |
1736 | gv_init_pvn(*gv, PL_defstash, "main::", 6, | |
1737 | GV_ADDMULTI); | |
1738 | GvHV(*gv) = | |
1739 | MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash)); | |
1740 | } | |
1741 | } | |
657ed7c1 | 1742 | goto ok; |
90aeefb4 BF |
1743 | } |
1744 | } | |
1745 | } | |
1746 | *len = name_cursor - *name; | |
657ed7c1 DM |
1747 | ok: |
1748 | Safefree(tmpfullbuf); /* free our tmpfullbuf if it was used */ | |
90aeefb4 | 1749 | return TRUE; |
657ed7c1 DM |
1750 | notok: |
1751 | Safefree(tmpfullbuf); /* free our tmpfullbuf if it was used */ | |
1752 | return FALSE; | |
90aeefb4 BF |
1753 | } |
1754 | ||
657ed7c1 | 1755 | |
536d1a88 | 1756 | /* Checks if an unqualified name is in the main stash */ |
90aeefb4 | 1757 | PERL_STATIC_INLINE bool |
536d1a88 | 1758 | S_gv_is_in_main(pTHX_ const char *name, STRLEN len, const U32 is_utf8) |
90aeefb4 | 1759 | { |
536d1a88 | 1760 | PERL_ARGS_ASSERT_GV_IS_IN_MAIN; |
90aeefb4 | 1761 | |
90aeefb4 | 1762 | /* If it's an alphanumeric variable */ |
7a207065 | 1763 | if ( len && isIDFIRST_lazy_if_safe(name, name + len, is_utf8) ) { |
90aeefb4 BF |
1764 | /* Some "normal" variables are always in main::, |
1765 | * like INC or STDOUT. | |
1766 | */ | |
1767 | switch (len) { | |
1768 | case 1: | |
1769 | if (*name == '_') | |
536d1a88 | 1770 | return TRUE; |
90aeefb4 BF |
1771 | break; |
1772 | case 3: | |
1773 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1774 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1775 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
536d1a88 | 1776 | return TRUE; |
90aeefb4 BF |
1777 | break; |
1778 | case 4: | |
1779 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1780 | && name[3] == 'V') | |
536d1a88 | 1781 | return TRUE; |
90aeefb4 BF |
1782 | break; |
1783 | case 5: | |
1784 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1785 | && name[3] == 'I' && name[4] == 'N') | |
536d1a88 | 1786 | return TRUE; |
90aeefb4 BF |
1787 | break; |
1788 | case 6: | |
1789 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1790 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1791 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
536d1a88 | 1792 | return TRUE; |
90aeefb4 BF |
1793 | break; |
1794 | case 7: | |
1795 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1796 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1797 | && name[6] == 'T') | |
536d1a88 | 1798 | return TRUE; |
90aeefb4 BF |
1799 | break; |
1800 | } | |
536d1a88 BF |
1801 | } |
1802 | /* *{""}, or a special variable like $@ */ | |
1803 | else | |
1804 | return TRUE; | |
1805 | ||
1806 | return FALSE; | |
1807 | } | |
1808 | ||
1809 | ||
1810 | /* This function is called if parse_gv_stash_name() failed to | |
1811 | * find a stash, or if GV_NOTQUAL or an empty name was passed | |
1812 | * to gv_fetchpvn_flags. | |
1813 | * | |
1814 | * It returns FALSE if the default stash can't be found nor created, | |
1815 | * which might happen during global destruction. | |
1816 | */ | |
1817 | PERL_STATIC_INLINE bool | |
1818 | S_find_default_stash(pTHX_ HV **stash, const char *name, STRLEN len, | |
1819 | const U32 is_utf8, const I32 add, | |
1820 | const svtype sv_type) | |
1821 | { | |
1822 | PERL_ARGS_ASSERT_FIND_DEFAULT_STASH; | |
1823 | ||
1824 | /* No stash in name, so see how we can default */ | |
90aeefb4 | 1825 | |
536d1a88 BF |
1826 | if ( gv_is_in_main(name, len, is_utf8) ) { |
1827 | *stash = PL_defstash; | |
1828 | } | |
1829 | else { | |
1830 | if (IN_PERL_COMPILETIME) { | |
90aeefb4 BF |
1831 | *stash = PL_curstash; |
1832 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
1833 | sv_type != SVt_PVCV && | |
1834 | sv_type != SVt_PVGV && | |
1835 | sv_type != SVt_PVFM && | |
1836 | sv_type != SVt_PVIO && | |
1837 | !(len == 1 && sv_type == SVt_PV && | |
1838 | (*name == 'a' || *name == 'b')) ) | |
1839 | { | |
c161da64 | 1840 | GV**gvp = (GV**)hv_fetch(*stash,name,is_utf8 ? -(I32)len : (I32)len,0); |
90aeefb4 BF |
1841 | if (!gvp || *gvp == (const GV *)&PL_sv_undef || |
1842 | SvTYPE(*gvp) != SVt_PVGV) | |
1843 | { | |
1844 | *stash = NULL; | |
1845 | } | |
1846 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || | |
1847 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1848 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
1849 | { | |
1850 | /* diag_listed_as: Variable "%s" is not imported%s */ | |
1851 | Perl_ck_warner_d( | |
1852 | aTHX_ packWARN(WARN_MISC), | |
147e3846 | 1853 | "Variable \"%c%" UTF8f "\" is not imported", |
90aeefb4 BF |
1854 | sv_type == SVt_PVAV ? '@' : |
1855 | sv_type == SVt_PVHV ? '%' : '$', | |
1856 | UTF8fARG(is_utf8, len, name)); | |
1857 | if (GvCVu(*gvp)) | |
1858 | Perl_ck_warner_d( | |
1859 | aTHX_ packWARN(WARN_MISC), | |
147e3846 | 1860 | "\t(Did you mean &%" UTF8f " instead?)\n", |
90aeefb4 BF |
1861 | UTF8fARG(is_utf8, len, name) |
1862 | ); | |
1863 | *stash = NULL; | |
1864 | } | |
1865 | } | |
1866 | } | |
1867 | else { | |
1868 | /* Use the current op's stash */ | |
1869 | *stash = CopSTASH(PL_curcop); | |
1870 | } | |
1871 | } | |
90aeefb4 BF |
1872 | |
1873 | if (!*stash) { | |
1874 | if (add && !PL_in_clean_all) { | |
10860bf4 FC |
1875 | GV *gv; |
1876 | qerror(Perl_mess(aTHX_ | |
147e3846 | 1877 | "Global symbol \"%s%" UTF8f |
d8c6310a | 1878 | "\" requires explicit package name (did you forget to " |
147e3846 | 1879 | "declare \"my %s%" UTF8f "\"?)", |
d8c6310a FC |
1880 | (sv_type == SVt_PV ? "$" |
1881 | : sv_type == SVt_PVAV ? "@" | |
1882 | : sv_type == SVt_PVHV ? "%" | |
1883 | : ""), UTF8fARG(is_utf8, len, name), | |
90aeefb4 BF |
1884 | (sv_type == SVt_PV ? "$" |
1885 | : sv_type == SVt_PVAV ? "@" | |
1886 | : sv_type == SVt_PVHV ? "%" | |
10860bf4 | 1887 | : ""), UTF8fARG(is_utf8, len, name))); |
cd164bf8 BF |
1888 | /* To maintain the output of errors after the strict exception |
1889 | * above, and to keep compat with older releases, rather than | |
1890 | * placing the variables in the pad, we place | |
1891 | * them in the <none>:: stash. | |
1892 | */ | |
90aeefb4 BF |
1893 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
1894 | if (!gv) { | |
1895 | /* symbol table under destruction */ | |
1896 | return FALSE; | |
1897 | } | |
1898 | *stash = GvHV(gv); | |
1899 | } | |
1900 | else | |
1901 | return FALSE; | |
1902 | } | |
1903 | ||
1904 | if (!SvREFCNT(*stash)) /* symbol table under destruction */ | |
1905 | return FALSE; | |
1906 | ||
1907 | return TRUE; | |
1908 | } | |
1909 | ||
8c995aba FC |
1910 | /* gv_magicalize only turns on the SVf_READONLY flag, not SVf_PROTECT. So |
1911 | redefine SvREADONLY_on for that purpose. We don’t use it later on in | |
1912 | this file. */ | |
1913 | #undef SvREADONLY_on | |
1914 | #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY) | |
1915 | ||
930867a8 BF |
1916 | /* gv_magicalize() is called by gv_fetchpvn_flags when creating |
1917 | * a new GV. | |
1918 | * Note that it does not insert the GV into the stash prior to | |
1919 | * magicalization, which some variables require need in order | |
c22e17d0 | 1920 | * to work (like %+, %-, %!), so callers must take care of |
1321bbe3 | 1921 | * that. |
930867a8 | 1922 | * |
1321bbe3 FC |
1923 | * It returns true if the gv did turn out to be magical one; i.e., |
1924 | * if gv_magicalize actually did something. | |
930867a8 BF |
1925 | */ |
1926 | PERL_STATIC_INLINE bool | |
1927 | S_gv_magicalize(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, | |
1321bbe3 | 1928 | const svtype sv_type) |
79072805 | 1929 | { |
960b831f | 1930 | SSize_t paren; |
79072805 | 1931 | |
930867a8 | 1932 | PERL_ARGS_ASSERT_GV_MAGICALIZE; |
90aeefb4 | 1933 | |
44428a46 | 1934 | if (stash != PL_defstash) { /* not the main stash */ |
ea238638 | 1935 | /* We only have to check for a few names here: a, b, EXPORT, ISA |
4aaa4757 FC |
1936 | and VERSION. All the others apply only to the main stash or to |
1937 | CORE (which is checked right after this). */ | |
ea238638 | 1938 | if (len) { |
cc4c2da6 | 1939 | switch (*name) { |
cc4c2da6 | 1940 | case 'E': |
3092ee0c YO |
1941 | if ( |
1942 | len >= 6 && name[1] == 'X' && | |
1943 | (memEQs(name, len, "EXPORT") | |
eafd371c YO |
1944 | ||memEQs(name, len, "EXPORT_OK") |
1945 | ||memEQs(name, len, "EXPORT_FAIL") | |
3092ee0c | 1946 | ||memEQs(name, len, "EXPORT_TAGS")) |
eafd371c | 1947 | ) |
cc4c2da6 NC |
1948 | GvMULTI_on(gv); |
1949 | break; | |
1950 | case 'I': | |
eafd371c | 1951 | if (memEQs(name, len, "ISA")) |
290a1700 | 1952 | gv_magicalize_isa(gv); |
cc4c2da6 | 1953 | break; |
44428a46 | 1954 | case 'V': |
eafd371c | 1955 | if (memEQs(name, len, "VERSION")) |
44428a46 FC |
1956 | GvMULTI_on(gv); |
1957 | break; | |
ea238638 | 1958 | case 'a': |
eafd371c | 1959 | if (stash == PL_debstash && memEQs(name, len, "args")) { |
7bb33634 FC |
1960 | GvMULTI_on(gv_AVadd(gv)); |
1961 | break; | |
eafd371c YO |
1962 | } |
1963 | /* FALLTHROUGH */ | |
ea238638 FC |
1964 | case 'b': |
1965 | if (len == 1 && sv_type == SVt_PV) | |
1966 | GvMULTI_on(gv); | |
924ba076 | 1967 | /* FALLTHROUGH */ |
4aaa4757 FC |
1968 | default: |
1969 | goto try_core; | |
1970 | } | |
1321bbe3 | 1971 | goto ret; |
4aaa4757 FC |
1972 | } |
1973 | try_core: | |
1974 | if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) { | |
1975 | /* Avoid null warning: */ | |
1976 | const char * const stashname = HvNAME(stash); assert(stashname); | |
c8b388b0 | 1977 | if (strBEGINs(stashname, "CORE")) |
87566176 | 1978 | S_maybe_add_coresub(aTHX_ 0, gv, name, len); |
44428a46 FC |
1979 | } |
1980 | } | |
1981 | else if (len > 1) { | |
1982 | #ifndef EBCDIC | |
1983 | if (*name > 'V' ) { | |
1984 | NOOP; | |
1985 | /* Nothing else to do. | |
1986 | The compiler will probably turn the switch statement into a | |
1987 | branch table. Make sure we avoid even that small overhead for | |
2ae25f5c KW |
1988 | the common case of lower case variable names. (On EBCDIC |
1989 | platforms, we can't just do: | |
1990 | if (NATIVE_TO_ASCII(*name) > NATIVE_TO_ASCII('V') ) { | |
1991 | because cases like '\027' in the switch statement below are | |
1992 | C1 (non-ASCII) controls on those platforms, so the remapping | |
1993 | would make them larger than 'V') | |
1994 | */ | |
44428a46 FC |
1995 | } else |
1996 | #endif | |
1997 | { | |
44428a46 FC |
1998 | switch (*name) { |
1999 | case 'A': | |
eafd371c | 2000 | if (memEQs(name, len, "ARGV")) { |
44428a46 FC |
2001 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
2002 | } | |
eafd371c | 2003 | else if (memEQs(name, len, "ARGVOUT")) { |
44428a46 FC |
2004 | GvMULTI_on(gv); |
2005 | } | |
2006 | break; | |
2007 | case 'E': | |
3092ee0c YO |
2008 | if ( |
2009 | len >= 6 && name[1] == 'X' && | |
2010 | (memEQs(name, len, "EXPORT") | |
055ae706 YO |
2011 | ||memEQs(name, len, "EXPORT_OK") |
2012 | ||memEQs(name, len, "EXPORT_FAIL") | |
3092ee0c | 2013 | ||memEQs(name, len, "EXPORT_TAGS")) |
055ae706 | 2014 | ) |
44428a46 FC |
2015 | GvMULTI_on(gv); |
2016 | break; | |
2017 | case 'I': | |
eafd371c | 2018 | if (memEQs(name, len, "ISA")) { |
290a1700 | 2019 | gv_magicalize_isa(gv); |
44428a46 FC |
2020 | } |
2021 | break; | |
cc4c2da6 | 2022 | case 'S': |
eafd371c | 2023 | if (memEQs(name, len, "SIG")) { |
cc4c2da6 NC |
2024 | HV *hv; |
2025 | I32 i; | |
d525a7b2 NC |
2026 | if (!PL_psig_name) { |
2027 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); | |
a02a5408 | 2028 | Newxz(PL_psig_pend, SIG_SIZE, int); |
d525a7b2 | 2029 | PL_psig_ptr = PL_psig_name + SIG_SIZE; |
0bdedcb3 NC |
2030 | } else { |
2031 | /* I think that the only way to get here is to re-use an | |
2032 | embedded perl interpreter, where the previous | |
2033 | use didn't clean up fully because | |
2034 | PL_perl_destruct_level was 0. I'm not sure that we | |
2035 | "support" that, in that I suspect in that scenario | |
2036 | there are sufficient other garbage values left in the | |
2037 | interpreter structure that something else will crash | |
2038 | before we get here. I suspect that this is one of | |
2039 | those "doctor, it hurts when I do this" bugs. */ | |
d525a7b2 | 2040 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); |
0bdedcb3 | 2041 | Zero(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 NC |
2042 | } |
2043 | GvMULTI_on(gv); | |
2044 | hv = GvHVn(gv); | |
a0714e2c | 2045 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 2046 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 2047 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
2048 | if (init) |
2049 | sv_setsv(*init, &PL_sv_undef); | |
cc4c2da6 NC |
2050 | } |
2051 | } | |
2052 | break; | |
2053 | case 'V': | |
eafd371c | 2054 | if (memEQs(name, len, "VERSION")) |
cc4c2da6 NC |
2055 | GvMULTI_on(gv); |
2056 | break; | |
e5218da5 | 2057 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
eafd371c | 2058 | if (memEQs(name, len, "\003HILD_ERROR_NATIVE")) |
e5218da5 | 2059 | goto magicalize; |
27deb0cf YO |
2060 | /* @{^CAPTURE} %{^CAPTURE} */ |
2061 | if (memEQs(name, len, "\003APTURE")) { | |
2062 | AV* const av = GvAVn(gv); | |
fa531f32 | 2063 | const Size_t n = *name; |
27deb0cf | 2064 | |
fa531f32 | 2065 | sv_magic(MUTABLE_SV(av), (SV*)n, PERL_MAGIC_regdata, NULL, 0); |
27deb0cf YO |
2066 | SvREADONLY_on(av); |
2067 | ||
d8422270 | 2068 | require_tie_mod_s(gv, '+', "Tie::Hash::NamedCapture",0); |
27deb0cf YO |
2069 | |
2070 | } else /* %{^CAPTURE_ALL} */ | |
2071 | if (memEQs(name, len, "\003APTURE_ALL")) { | |
d8422270 | 2072 | require_tie_mod_s(gv, '-', "Tie::Hash::NamedCapture",0); |
27deb0cf | 2073 | } |
e5218da5 | 2074 | break; |
cc4c2da6 | 2075 | case '\005': /* $^ENCODING */ |
eafd371c | 2076 | if (memEQs(name, len, "\005NCODING")) |
cc4c2da6 NC |
2077 | goto magicalize; |
2078 | break; | |
9ebf26ad | 2079 | case '\007': /* $^GLOBAL_PHASE */ |
eafd371c | 2080 | if (memEQs(name, len, "\007LOBAL_PHASE")) |
9ebf26ad FR |
2081 | goto ro_magicalize; |
2082 | break; | |
8561ea1d | 2083 | case '\014': /* $^LAST_FH */ |
eafd371c | 2084 | if (memEQs(name, len, "\014AST_FH")) |
8561ea1d FC |
2085 | goto ro_magicalize; |
2086 | break; | |
cde0cee5 | 2087 | case '\015': /* $^MATCH */ |
eafd371c | 2088 | if (memEQs(name, len, "\015ATCH")) { |
960b831f NC |
2089 | paren = RX_BUFF_IDX_CARET_FULLMATCH; |
2090 | goto storeparen; | |
2091 | } | |
66230c86 | 2092 | break; |
cc4c2da6 | 2093 | case '\017': /* $^OPEN */ |
eafd371c | 2094 | if (memEQs(name, len, "\017PEN")) |
cc4c2da6 NC |
2095 | goto magicalize; |
2096 | break; | |
cde0cee5 | 2097 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
eafd371c | 2098 | if (memEQs(name, len, "\020REMATCH")) { |
960b831f NC |
2099 | paren = RX_BUFF_IDX_CARET_PREMATCH; |
2100 | goto storeparen; | |
2101 | } | |
eafd371c | 2102 | if (memEQs(name, len, "\020OSTMATCH")) { |
960b831f NC |
2103 | paren = RX_BUFF_IDX_CARET_POSTMATCH; |
2104 | goto storeparen; | |
2105 | } | |
9ebf26ad | 2106 | break; |
f512d242 KW |
2107 | case '\023': |
2108 | if (memEQs(name, len, "\023AFE_LOCALES")) | |
2109 | goto ro_magicalize; | |
2110 | break; | |
cc4c2da6 | 2111 | case '\024': /* ${^TAINT} */ |
eafd371c | 2112 | if (memEQs(name, len, "\024AINT")) |
cc4c2da6 NC |
2113 | goto ro_magicalize; |
2114 | break; | |
7cebcbc0 | 2115 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
eafd371c | 2116 | if (memEQs(name, len, "\025NICODE")) |
cc4c2da6 | 2117 | goto ro_magicalize; |
eafd371c | 2118 | if (memEQs(name, len, "\025TF8LOCALE")) |
7cebcbc0 | 2119 | goto ro_magicalize; |
eafd371c | 2120 | if (memEQs(name, len, "\025TF8CACHE")) |
e07ea26a | 2121 | goto magicalize; |
cc4c2da6 NC |
2122 | break; |
2123 | case '\027': /* $^WARNING_BITS */ | |
eafd371c | 2124 | if (memEQs(name, len, "\027ARNING_BITS")) |
cc4c2da6 | 2125 | goto magicalize; |
8ca2a5d6 | 2126 | #ifdef WIN32 |
eafd371c | 2127 | else if (memEQs(name, len, "\027IN32_SLOPPY_STAT")) |
8ca2a5d6 DD |
2128 | goto magicalize; |
2129 | #endif | |
cc4c2da6 NC |
2130 | break; |
2131 | case '1': | |
2132 | case '2': | |
2133 | case '3': | |
2134 | case '4': | |
2135 | case '5': | |
2136 | case '6': | |
2137 | case '7': | |
2138 | case '8': | |
2139 | case '9': | |
85e6fe83 | 2140 | { |
2fdbfb4d AB |
2141 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
2142 | this test */ | |
22ff3130 HS |
2143 | UV uv; |
2144 | if (!grok_atoUV(name, &uv, NULL) || uv > I32_MAX) | |
1321bbe3 | 2145 | goto ret; |
22ff3130 HS |
2146 | /* XXX why are we using a SSize_t? */ |
2147 | paren = (SSize_t)(I32)uv; | |
960b831f | 2148 | goto storeparen; |
1d7c1841 | 2149 | } |
dc437b57 | 2150 | } |
93a17b20 | 2151 | } |
392db708 NC |
2152 | } else { |
2153 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
2154 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 | 2155 | switch (*name) { |
6361f656 | 2156 | case '&': /* $& */ |
960b831f NC |
2157 | paren = RX_BUFF_IDX_FULLMATCH; |
2158 | goto sawampersand; | |
6361f656 | 2159 | case '`': /* $` */ |
960b831f NC |
2160 | paren = RX_BUFF_IDX_PREMATCH; |
2161 | goto sawampersand; | |
6361f656 | 2162 | case '\'': /* $' */ |
960b831f NC |
2163 | paren = RX_BUFF_IDX_POSTMATCH; |
2164 | sawampersand: | |
1a904fc8 | 2165 | #ifdef PERL_SAWAMPERSAND |
a289ef89 | 2166 | if (!( |
cc4c2da6 NC |
2167 | sv_type == SVt_PVAV || |
2168 | sv_type == SVt_PVHV || | |
2169 | sv_type == SVt_PVCV || | |
2170 | sv_type == SVt_PVFM || | |
2171 | sv_type == SVt_PVIO | |
d3b97530 DM |
2172 | )) { PL_sawampersand |= |
2173 | (*name == '`') | |
2174 | ? SAWAMPERSAND_LEFT | |
2175 | : (*name == '&') | |
2176 | ? SAWAMPERSAND_MIDDLE | |
2177 | : SAWAMPERSAND_RIGHT; | |
2178 | } | |
1a904fc8 | 2179 | #endif |
960b831f | 2180 | goto storeparen; |
e91d8259 NC |
2181 | case '1': /* $1 */ |
2182 | case '2': /* $2 */ | |
2183 | case '3': /* $3 */ | |
2184 | case '4': /* $4 */ | |
2185 | case '5': /* $5 */ | |
2186 | case '6': /* $6 */ | |
2187 | case '7': /* $7 */ | |
2188 | case '8': /* $8 */ | |
2189 | case '9': /* $9 */ | |
960b831f NC |
2190 | paren = *name - '0'; |
2191 | ||
2192 | storeparen: | |
e91d8259 NC |
2193 | /* Flag the capture variables with a NULL mg_ptr |
2194 | Use mg_len for the array index to lookup. */ | |
960b831f | 2195 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, NULL, paren); |
e91d8259 | 2196 | break; |
cc4c2da6 | 2197 | |
6361f656 | 2198 | case ':': /* $: */ |
c69033f2 | 2199 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
2200 | goto magicalize; |
2201 | ||
6361f656 | 2202 | case '?': /* $? */ |
ff0cee69 | 2203 | #ifdef COMPLEX_STATUS |
c69033f2 | 2204 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 2205 | #endif |
cc4c2da6 | 2206 | goto magicalize; |
ff0cee69 | 2207 | |
6361f656 | 2208 | case '!': /* $! */ |
67261566 | 2209 | GvMULTI_on(gv); |
44a2ac75 | 2210 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 2211 | |
ad64d0ec | 2212 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 | 2213 | |
7c719134 | 2214 | /* magicalization must be done before require_tie_mod_s is called */ |
67261566 | 2215 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
7c719134 | 2216 | require_tie_mod_s(gv, '!', "Errno", 1); |
d2c93421 | 2217 | |
6cef1e77 | 2218 | break; |
754f85ad YO |
2219 | case '-': /* $-, %-, @- */ |
2220 | case '+': /* $+, %+, @+ */ | |
27deb0cf YO |
2221 | GvMULTI_on(gv); /* no used once warnings here */ |
2222 | { /* $- $+ */ | |
2223 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
2224 | if (*name == '+') | |
2225 | SvREADONLY_on(GvSVn(gv)); | |
2226 | } | |
2227 | { /* %- %+ */ | |
2228 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
2229 | require_tie_mod_s(gv, *name, "Tie::Hash::NamedCapture",0); | |
2230 | } | |
2231 | { /* @- @+ */ | |
2232 | AV* const av = GvAVn(gv); | |
fa531f32 | 2233 | const Size_t n = *name; |
67261566 | 2234 | |
fa531f32 | 2235 | sv_magic(MUTABLE_SV(av), (SV*)n, PERL_MAGIC_regdata, NULL, 0); |
27deb0cf YO |
2236 | SvREADONLY_on(av); |
2237 | } | |
80305961 | 2238 | break; |
a678626e A |
2239 | case '*': /* $* */ |
2240 | case '#': /* $# */ | |
dcb414ac JK |
2241 | if (sv_type == SVt_PV) |
2242 | /* diag_listed_as: $* is no longer supported as of Perl 5.30 */ | |
2243 | Perl_croak(aTHX_ "$%c is no longer supported as of Perl 5.30", *name); | |
2244 | break; | |
b3ca2e83 NC |
2245 | case '\010': /* $^H */ |
2246 | { | |
2247 | HV *const hv = GvHVn(gv); | |
2248 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
2249 | } | |
2250 | goto magicalize; | |
cc4c2da6 | 2251 | case '\023': /* $^S */ |
2fdbfb4d AB |
2252 | ro_magicalize: |
2253 | SvREADONLY_on(GvSVn(gv)); | |
924ba076 | 2254 | /* FALLTHROUGH */ |
6361f656 | 2255 | case '0': /* $0 */ |
6361f656 AB |
2256 | case '^': /* $^ */ |
2257 | case '~': /* $~ */ | |
2258 | case '=': /* $= */ | |
2259 | case '%': /* $% */ | |
2260 | case '.': /* $. */ | |
2261 | case '(': /* $( */ | |
2262 | case ')': /* $) */ | |
2263 | case '<': /* $< */ | |
2264 | case '>': /* $> */ | |
2265 | case '\\': /* $\ */ | |
2266 | case '/': /* $/ */ | |
4505a31f | 2267 | case '|': /* $| */ |
9cdac2a2 | 2268 | case '$': /* $$ */ |
c22e17d0 | 2269 | case '[': /* $[ */ |
cc4c2da6 NC |
2270 | case '\001': /* $^A */ |
2271 | case '\003': /* $^C */ | |
2272 | case '\004': /* $^D */ | |
2273 | case '\005': /* $^E */ | |
2274 | case '\006': /* $^F */ | |
cc4c2da6 NC |
2275 | case '\011': /* $^I, NOT \t in EBCDIC */ |
2276 | case '\016': /* $^N */ | |
2277 | case '\017': /* $^O */ | |
2278 | case '\020': /* $^P */ | |
2279 | case '\024': /* $^T */ | |
2280 | case '\027': /* $^W */ | |
2281 | magicalize: | |
ad64d0ec | 2282 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
cc4c2da6 | 2283 | break; |
e521374c | 2284 | |
cc4c2da6 | 2285 | case '\014': /* $^L */ |
76f68e9b | 2286 | sv_setpvs(GvSVn(gv),"\f"); |
463ee0b2 | 2287 | break; |
6361f656 | 2288 | case ';': /* $; */ |
76f68e9b | 2289 | sv_setpvs(GvSVn(gv),"\034"); |
463ee0b2 | 2290 | break; |
6361f656 | 2291 | case ']': /* $] */ |
cc4c2da6 | 2292 | { |
3638bf15 | 2293 | SV * const sv = GvSV(gv); |
d7aa5382 | 2294 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 2295 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
2296 | GvSV(gv) = vnumify(PL_patchlevel); |
2297 | SvREADONLY_on(GvSV(gv)); | |
2298 | SvREFCNT_dec(sv); | |
93a17b20 LW |
2299 | } |
2300 | break; | |
cc4c2da6 NC |
2301 | case '\026': /* $^V */ |
2302 | { | |
3638bf15 | 2303 | SV * const sv = GvSV(gv); |
f9be5ac8 DM |
2304 | GvSV(gv) = new_version(PL_patchlevel); |
2305 | SvREADONLY_on(GvSV(gv)); | |
2306 | SvREFCNT_dec(sv); | |
16070b82 GS |
2307 | } |
2308 | break; | |
ea238638 FC |
2309 | case 'a': |
2310 | case 'b': | |
dc3e91f6 | 2311 | if (sv_type == SVt_PV) |
ea238638 | 2312 | GvMULTI_on(gv); |
cc4c2da6 | 2313 | } |
79072805 | 2314 | } |
930867a8 | 2315 | |
1321bbe3 FC |
2316 | ret: |
2317 | /* Return true if we actually did something. */ | |
2318 | return GvAV(gv) || GvHV(gv) || GvIO(gv) || GvCV(gv) | |
2319 | || ( GvSV(gv) && ( | |
2320 | SvOK(GvSV(gv)) || SvMAGICAL(GvSV(gv)) | |
2321 | ) | |
2322 | ); | |
71c35c05 BF |
2323 | } |
2324 | ||
8c995aba FC |
2325 | /* If we do ever start using this later on in the file, we need to make |
2326 | sure we don’t accidentally use the wrong definition. */ | |
2327 | #undef SvREADONLY_on | |
2328 | ||
070dc475 BF |
2329 | /* This function is called when the stash already holds the GV of the magic |
2330 | * variable we're looking for, but we need to check that it has the correct | |
2331 | * kind of magic. For example, if someone first uses $! and then %!, the | |
2332 | * latter would end up here, and we add the Errno tie to the HASH slot of | |
2333 | * the *! glob. | |
2334 | */ | |
2335 | PERL_STATIC_INLINE void | |
2336 | S_maybe_multimagic_gv(pTHX_ GV *gv, const char *name, const svtype sv_type) | |
2337 | { | |
2338 | PERL_ARGS_ASSERT_MAYBE_MULTIMAGIC_GV; | |
2339 | ||
2340 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) { | |
2341 | if (*name == '!') | |
7c719134 | 2342 | require_tie_mod_s(gv, '!', "Errno", 1); |
070dc475 | 2343 | else if (*name == '-' || *name == '+') |
7c719134 | 2344 | require_tie_mod_s(gv, *name, "Tie::Hash::NamedCapture", 0); |
a678626e A |
2345 | } else if (sv_type == SVt_PV) { |
2346 | if (*name == '*' || *name == '#') { | |
dcb414ac JK |
2347 | /* diag_listed_as: $* is no longer supported as of Perl 5.30 */ |
2348 | Perl_croak(aTHX_ "$%c is no longer supported as of Perl 5.30", *name); | |
a678626e | 2349 | } |
070dc475 BF |
2350 | } |
2351 | if (sv_type==SVt_PV || sv_type==SVt_PVGV) { | |
2352 | switch (*name) { | |
070dc475 BF |
2353 | #ifdef PERL_SAWAMPERSAND |
2354 | case '`': | |
2355 | PL_sawampersand |= SAWAMPERSAND_LEFT; | |
2356 | (void)GvSVn(gv); | |
2357 | break; | |
2358 | case '&': | |
2359 | PL_sawampersand |= SAWAMPERSAND_MIDDLE; | |
2360 | (void)GvSVn(gv); | |
2361 | break; | |
2362 | case '\'': | |
2363 | PL_sawampersand |= SAWAMPERSAND_RIGHT; | |
2364 | (void)GvSVn(gv); | |
2365 | break; | |
2366 | #endif | |
2367 | } | |
2368 | } | |
2369 | } | |
2370 | ||
84ca0d82 KW |
2371 | /* |
2372 | =for apidoc gv_fetchpv | |
2373 | =for apidoc_item |GV *|gv_fetchpvn|const char * nambeg|STRLEN full_len|I32 flags|const svtype sv_type | |
2374 | =for apidoc_item ||gv_fetchpvn_flags | |
2375 | =for apidoc_item |GV *|gv_fetchpvs|"name"|I32 flags|const svtype sv_type | |
2376 | =for apidoc_item ||gv_fetchsv | |
2377 | =for apidoc_item |GV *|gv_fetchsv_nomg|SV *name|I32 flags|const svtype sv_type | |
2378 | ||
2379 | These all return the GV of type C<sv_type> whose name is given by the inputs, | |
2380 | or NULL if no GV of that name and type could be found. See L<perlguts/Stashes | |
2381 | and Globs>. | |
2382 | ||
2383 | The only differences are how the input name is specified, and if 'get' magic is | |
2384 | normally used in getting that name. | |
2385 | ||
2386 | Don't be fooled by the fact that only one form has C<flags> in its name. They | |
2387 | all have a C<flags> parameter in fact, and all the flag bits have the same | |
2388 | meanings for all | |
2389 | ||
2390 | If any of the flags C<GV_ADD>, C<GV_ADDMG>, C<GV_ADDWARN>, C<GV_ADDMULTI>, or | |
2391 | C<GV_NOINIT> is set, a GV is created if none already exists for the input name | |
2392 | and type. However, C<GV_ADDMG> will only do the creation for magical GV's. | |
2393 | For all of these flags except C<GV_NOINIT>, C<L</gv_init_pvn>> is called after | |
2394 | the addition. C<GV_ADDWARN> is used when the caller expects that adding won't | |
2395 | be necessary because the symbol should already exist; but if not, add it | |
2396 | anyway, with a warning that it was unexpectedly absent. The C<GV_ADDMULTI> | |
2397 | flag means to pretend that the GV has been seen before (I<i.e.>, suppress "Used | |
2398 | once" warnings). | |
2399 | ||
2400 | The flag C<GV_NOADD_NOINIT> causes C<L</gv_init_pvn>> not be to called if the | |
2401 | GV existed but isn't PVGV. | |
2402 | ||
2403 | If the C<SVf_UTF8> bit is set, the name is treated as being encoded in UTF-8; | |
2404 | otherwise the name won't be considered to be UTF-8 in the C<pv>-named forms, | |
2405 | and the UTF-8ness of the underlying SVs will be used in the C<sv> forms. | |
2406 | ||
2407 | If the flag C<GV_NOTQUAL> is set, the caller warrants that the input name is a | |
2408 | plain symbol name, not qualified with a package, otherwise the name is checked | |
2409 | for being a qualified one. | |
2410 | ||
2411 | In C<gv_fetchpv>, C<nambeg> is a C string, NUL-terminated with no intermediate | |
2412 | NULs. | |
2413 | ||
2414 | In C<gv_fetchpvs>, C<name> is a literal C string, hence is enclosed in | |
2415 | double quotes. | |
2416 | ||
2417 | C<gv_fetchpvn> and C<gv_fetchpvn_flags> are identical. In these, <nambeg> is | |
2418 | a Perl string whose byte length is given by C<full_len>, and may contain | |
2419 | embedded NULs. | |
2420 | ||
2421 | In C<gv_fetchsv> and C<gv_fetchsv_nomg>, the name is extracted from the PV of | |
2422 | the input C<name> SV. The only difference between these two forms is that | |
2423 | 'get' magic is normally done on C<name> in C<gv_fetchsv>, and always skipped | |
2424 | with C<gv_fetchsv_nomg>. Including C<GV_NO_SVGMAGIC> in the C<flags> parameter | |
2425 | to C<gv_fetchsv> makes it behave identically to C<gv_fetchsv_nomg>. | |
2426 | ||
2427 | =for apidoc Amnh||GV_ADD | |
2428 | =for apidoc Amnh||GV_ADDMG | |
2429 | =for apidoc Amnh||GV_ADDMULTI | |
2430 | =for apidoc Amnh||GV_ADDWARN | |
2431 | =for apidoc Amnh||GV_NOADD_NOINIT | |
2432 | =for apidoc Amnh||GV_NOINIT | |
2433 | =for apidoc Amnh||GV_NOTQUAL | |
2434 | =for apidoc Amnh||GV_NO_SVGMAGIC | |
2435 | =for apidoc Amnh||SVf_UTF8 | |
2436 | ||
2437 | =cut | |
2438 | */ | |
2439 | ||
71c35c05 BF |
2440 | GV * |
2441 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
2442 | const svtype sv_type) | |
2443 | { | |
71c35c05 BF |
2444 | const char *name = nambeg; |
2445 | GV *gv = NULL; | |
2446 | GV**gvp; | |
2447 | STRLEN len; | |
2448 | HV *stash = NULL; | |
2449 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); | |
2450 | const I32 no_expand = flags & GV_NOEXPAND; | |
2451 | const I32 add = flags & ~GV_NOADD_MASK; | |
2452 | const U32 is_utf8 = flags & SVf_UTF8; | |
930867a8 | 2453 | bool addmg = cBOOL(flags & GV_ADDMG); |
71c35c05 BF |
2454 | const char *const name_end = nambeg + full_len; |
2455 | U32 faking_it; | |
2456 | ||
2457 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; | |
2458 | ||
2459 | /* If we have GV_NOTQUAL, the caller promised that | |
2460 | * there is no stash, so we can skip the check. | |
2461 | * Similarly if full_len is 0, since then we're | |
2462 | * dealing with something like *{""} or ""->foo() | |
2463 | */ | |
2464 | if ((flags & GV_NOTQUAL) || !full_len) { | |
2465 | len = full_len; | |
2466 | } | |
2467 | else if (parse_gv_stash_name(&stash, &gv, &name, &len, nambeg, full_len, is_utf8, add)) { | |
2468 | if (name == name_end) return gv; | |
2469 | } | |
2470 | else { | |
2471 | return NULL; | |
2472 | } | |
2473 | ||
2474 | if (!stash && !find_default_stash(&stash, name, len, is_utf8, add, sv_type)) { | |
2475 | return NULL; | |
2476 | } | |
2477 | ||
2478 | /* By this point we should have a stash and a name */ | |
c161da64 | 2479 | gvp = (GV**)hv_fetch(stash,name,is_utf8 ? -(I32)len : (I32)len,add); |
71c35c05 | 2480 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) { |
ce11cda0 | 2481 | if (addmg) gv = (GV *)newSV(0); /* tentatively */ |
71c35c05 BF |
2482 | else return NULL; |
2483 | } | |
2484 | else gv = *gvp, addmg = 0; | |
2485 | /* From this point on, addmg means gv has not been inserted in the | |
2486 | symtab yet. */ | |
2487 | ||
2488 | if (SvTYPE(gv) == SVt_PVGV) { | |
c002ae9a BF |
2489 | /* The GV already exists, so return it, but check if we need to do |
2490 | * anything else with it before that. | |
2491 | */ | |
71c35c05 | 2492 | if (add) { |
c002ae9a BF |
2493 | /* This is the heuristic that handles if a variable triggers the |
2494 | * 'used only once' warning. If there's already a GV in the stash | |
2495 | * with this name, then we assume that the variable has been used | |
2496 | * before and turn its MULTI flag on. | |
2497 | * It's a heuristic because it can easily be "tricked", like with | |
2498 | * BEGIN { $a = 1; $::{foo} = *a }; () = $foo | |
2499 | * not warning about $main::foo being used just once | |
2500 | */ | |
71c35c05 BF |
2501 | GvMULTI_on(gv); |
2502 | gv_init_svtype(gv, sv_type); | |
2503 | /* You reach this path once the typeglob has already been created, | |
2504 | either by the same or a different sigil. If this path didn't | |
2505 | exist, then (say) referencing $! first, and %! second would | |
2506 | mean that %! was not handled correctly. */ | |
2507 | if (len == 1 && stash == PL_defstash) { | |
070dc475 | 2508 | maybe_multimagic_gv(gv, name, sv_type); |
71c35c05 | 2509 | } |
b59bf0b2 KW |
2510 | else if (sv_type == SVt_PVAV |
2511 | && memEQs(name, len, "ISA") | |
71c35c05 BF |
2512 | && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv)))) |
2513 | gv_magicalize_isa(gv); | |
2514 | } | |
2515 | return gv; | |
2516 | } else if (no_init) { | |
2517 | assert(!addmg); | |
2518 | return gv; | |
c002ae9a BF |
2519 | } |
2520 | /* If GV_NOEXPAND is true and what we got off the stash is a ref, | |
2521 | * don't expand it to a glob. This is an optimization so that things | |
2522 | * copying constants over, like Exporter, don't have to be rewritten | |
2523 | * to take into account that you can store more than just globs in | |
2524 | * stashes. | |
2525 | */ | |
2526 | else if (no_expand && SvROK(gv)) { | |
71c35c05 BF |
2527 | assert(!addmg); |
2528 | return gv; | |
2529 | } | |
2530 | ||
2531 | /* Adding a new symbol. | |
2532 | Unless of course there was already something non-GV here, in which case | |
2533 | we want to behave as if there was always a GV here, containing some sort | |
2534 | of subroutine. | |
2535 | Otherwise we run the risk of creating things like GvIO, which can cause | |
2536 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
2537 | ||
2538 | faking_it = SvOK(gv); | |
2539 | ||
2540 | if (add & GV_ADDWARN) | |
2541 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
147e3846 | 2542 | "Had to create %" UTF8f " unexpectedly", |
71c35c05 BF |
2543 | UTF8fARG(is_utf8, name_end-nambeg, nambeg)); |
2544 | gv_init_pvn(gv, stash, name, len, (add & GV_ADDMULTI)|is_utf8); | |
2545 | ||
7a207065 KW |
2546 | if ( full_len != 0 |
2547 | && isIDFIRST_lazy_if_safe(name, name + full_len, is_utf8) | |
2548 | && !ckWARN(WARN_ONCE) ) | |
2549 | { | |
71c35c05 | 2550 | GvMULTI_on(gv) ; |
7a207065 | 2551 | } |
71c35c05 BF |
2552 | |
2553 | /* set up magic where warranted */ | |
1321bbe3 | 2554 | if ( gv_magicalize(gv, stash, name, len, sv_type) ) { |
930867a8 | 2555 | /* See 23496c6 */ |
1321bbe3 FC |
2556 | if (addmg) { |
2557 | /* gv_magicalize magicalised this gv, so we want it | |
930867a8 | 2558 | * stored in the symtab. |
1321bbe3 FC |
2559 | * Effectively the caller is asking, ‘Does this gv exist?’ |
2560 | * And we respond, ‘Er, *now* it does!’ | |
930867a8 BF |
2561 | */ |
2562 | (void)hv_store(stash,name,len,(SV *)gv,0); | |
1321bbe3 FC |
2563 | } |
2564 | } | |
2565 | else if (addmg) { | |
2566 | /* The temporary GV created above */ | |
930867a8 BF |
2567 | SvREFCNT_dec_NN(gv); |
2568 | gv = NULL; | |
930867a8 | 2569 | } |
71c35c05 | 2570 | |
e6066781 | 2571 | if (gv) gv_init_svtype(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 | 2572 | return gv; |
79072805 LW |
2573 | } |
2574 | ||
2575 | void | |
35a4481c | 2576 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2577 | { |
ed60a868 | 2578 | const char *name; |
35a4481c | 2579 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
2580 | |
2581 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
2582 | ||
666ea192 | 2583 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 2584 | |
52a6327b | 2585 | if (hv && (name = HvNAME(hv))) { |
ed60a868 | 2586 | const STRLEN len = HvNAMELEN(hv); |
61e2287f | 2587 | if (keepmain || ! memBEGINs(name, len, "main")) { |
ed60a868 | 2588 | sv_catpvn_flags(sv,name,len,HvNAMEUTF8(hv)?SV_CATUTF8:SV_CATBYTES); |
396482e1 | 2589 | sv_catpvs(sv,"::"); |
ed60a868 | 2590 | } |
43693395 | 2591 | } |
ed60a868 | 2592 | else sv_catpvs(sv,"__ANON__::"); |
04f3bf56 | 2593 | sv_catsv(sv,sv_2mortal(newSVhek(GvNAME_HEK(gv)))); |
43693395 GS |
2594 | } |
2595 | ||
2596 | void | |
35a4481c | 2597 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2598 | { |
099be4f1 | 2599 | const GV * const egv = GvEGVx(gv); |
7918f24d NC |
2600 | |
2601 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
2602 | ||
46c461b5 | 2603 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
2604 | } |
2605 | ||
39a65960 DM |
2606 | |
2607 | /* recursively scan a stash and any nested stashes looking for entries | |
2608 | * that need the "only used once" warning raised | |
2609 | */ | |
2610 | ||
79072805 | 2611 | void |
51da40ed | 2612 | Perl_gv_check(pTHX_ HV *stash) |
79072805 | 2613 | { |
eb578fdb | 2614 | I32 i; |
463ee0b2 | 2615 | |
7918f24d NC |
2616 | PERL_ARGS_ASSERT_GV_CHECK; |
2617 | ||
9e5cda6b | 2618 | if (!SvOOK(stash)) |
8990e307 | 2619 | return; |
90754377 | 2620 | |
9e5cda6b | 2621 | assert(HvARRAY(stash)); |
90754377 | 2622 | |
a0d0e21e | 2623 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 2624 | const HE *entry; |
90754377 | 2625 | /* mark stash is being scanned, to avoid recursing */ |
339441ef | 2626 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_SCAN_STASH; |
dc437b57 | 2627 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
eb578fdb | 2628 | GV *gv; |
b7787f18 | 2629 | HV *hv; |
e7acdfe9 DM |
2630 | STRLEN keylen = HeKLEN(entry); |
2631 | const char * const key = HeKEY(entry); | |
2632 | ||
2633 | if (keylen >= 2 && key[keylen-2] == ':' && key[keylen-1] == ':' && | |
159b6efe | 2634 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 2635 | { |
90754377 DM |
2636 | if (hv != PL_defstash && hv != stash |
2637 | && !(SvOOK(hv) | |
2638 | && (HvAUX(hv)->xhv_aux_flags & HvAUXf_SCAN_STASH)) | |
2639 | ) | |
a0d0e21e LW |
2640 | gv_check(hv); /* nested package */ |
2641 | } | |
7a207065 KW |
2642 | else if ( HeKLEN(entry) != 0 |
2643 | && *HeKEY(entry) != '_' | |
2644 | && isIDFIRST_lazy_if_safe(HeKEY(entry), | |
2645 | HeKEY(entry) + HeKLEN(entry), | |
2646 | HeUTF8(entry)) ) | |
2647 | { | |
e1ec3a88 | 2648 | const char *file; |
159b6efe | 2649 | gv = MUTABLE_GV(HeVAL(entry)); |
55d729e4 | 2650 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 2651 | continue; |
1d7c1841 | 2652 | file = GvFILE(gv); |
1d7c1841 | 2653 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1dc74fdb FC |
2654 | #ifdef USE_ITHREADS |
2655 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ | |
2656 | #else | |
2657 | CopFILEGV(PL_curcop) | |
2658 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
2659 | #endif | |
9014280d | 2660 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
147e3846 | 2661 | "Name \"%" HEKf "::%" HEKf |
d0c0e7dd FC |
2662 | "\" used only once: possible typo", |
2663 | HEKfARG(HvNAME_HEK(stash)), | |
2664 | HEKfARG(GvNAME_HEK(gv))); | |
463ee0b2 | 2665 | } |
79072805 | 2666 | } |
339441ef | 2667 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_SCAN_STASH; |
79072805 LW |
2668 | } |
2669 | } | |
2670 | ||
2671 | GV * | |
9cc50d5b | 2672 | Perl_newGVgen_flags(pTHX_ const char *pack, U32 flags) |
79072805 | 2673 | { |
9cc50d5b | 2674 | PERL_ARGS_ASSERT_NEWGVGEN_FLAGS; |
b17a0679 | 2675 | assert(!(flags & ~SVf_UTF8)); |
7918f24d | 2676 | |
147e3846 | 2677 | return gv_fetchpv(Perl_form(aTHX_ "%" UTF8f "::_GEN_%ld", |
b17a0679 | 2678 | UTF8fARG(flags, strlen(pack), pack), |
9cc50d5b BF |
2679 | (long)PL_gensym++), |
2680 | GV_ADD, SVt_PVGV); | |
79072805 LW |
2681 | } |
2682 | ||
2683 | /* hopefully this is only called on local symbol table entries */ | |
2684 | ||
2685 | GP* | |
864dbfa3 | 2686 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 2687 | { |
1d7c1841 | 2688 | if (!gp) |
d4c19fe8 | 2689 | return NULL; |
79072805 | 2690 | gp->gp_refcnt++; |
44a8e56a | 2691 | if (gp->gp_cv) { |
2692 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
2693 | /* If the GP they asked for a reference to contains |
2694 | a method cache entry, clear it first, so that we | |
2695 | don't infect them with our cached entry */ | |
e7881358 | 2696 | SvREFCNT_dec_NN(gp->gp_cv); |
601f1833 | 2697 | gp->gp_cv = NULL; |
44a8e56a | 2698 | gp->gp_cvgen = 0; |
2699 | } | |
44a8e56a | 2700 | } |
79072805 | 2701 | return gp; |
79072805 LW |
2702 | } |
2703 | ||
2704 | void | |
864dbfa3 | 2705 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 2706 | { |
79072805 | 2707 | GP* gp; |
b0d55c99 | 2708 | int attempts = 100; |
79072805 | 2709 | |
f7877b28 | 2710 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 2711 | return; |
f248d071 | 2712 | if (gp->gp_refcnt == 0) { |
9b387841 NC |
2713 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
2714 | "Attempt to free unreferenced glob pointers" | |
2715 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
2716 | return; |
2717 | } | |
4571f4a7 | 2718 | if (gp->gp_refcnt > 1) { |
bc81b34d | 2719 | borrowed: |
748a9306 LW |
2720 | if (gp->gp_egv == gv) |
2721 | gp->gp_egv = 0; | |
4571f4a7 | 2722 | gp->gp_refcnt--; |
c43ae56f | 2723 | GvGP_set(gv, NULL); |
79072805 | 2724 | return; |
748a9306 | 2725 | } |
79072805 | 2726 | |
b0d55c99 FC |
2727 | while (1) { |
2728 | /* Copy and null out all the glob slots, so destructors do not see | |
2729 | freed SVs. */ | |
2730 | HEK * const file_hek = gp->gp_file_hek; | |
2731 | SV * const sv = gp->gp_sv; | |
2732 | AV * const av = gp->gp_av; | |
2733 | HV * const hv = gp->gp_hv; | |
2734 | IO * const io = gp->gp_io; | |
2735 | CV * const cv = gp->gp_cv; | |
2736 | CV * const form = gp->gp_form; | |
2737 | ||
2738 | gp->gp_file_hek = NULL; | |
2739 | gp->gp_sv = NULL; | |
2740 | gp->gp_av = NULL; | |
2741 | gp->gp_hv = NULL; | |
2742 | gp->gp_io = NULL; | |
2743 | gp->gp_cv = NULL; | |
2744 | gp->gp_form = NULL; | |
2745 | ||
2746 | if (file_hek) | |
2747 | unshare_hek(file_hek); | |
2748 | ||
2749 | SvREFCNT_dec(sv); | |
2750 | SvREFCNT_dec(av); | |
2751 | /* FIXME - another reference loop GV -> symtab -> GV ? | |
2752 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
2753 | if (hv && SvTYPE(hv) == SVt_PVHV) { | |
c2242065 | 2754 | const HEK *hvname_hek = HvNAME_HEK(hv); |
923ed580 FC |
2755 | if (PL_stashcache && hvname_hek) { |
2756 | DEBUG_o(Perl_deb(aTHX_ | |
147e3846 | 2757 | "gp_free clearing PL_stashcache for '%" HEKf "'\n", |
923ed580 | 2758 | HEKfARG(hvname_hek))); |
0ca9877d | 2759 | (void)hv_deletehek(PL_stashcache, hvname_hek, G_DISCARD); |
923ed580 | 2760 | } |
b0d55c99 FC |
2761 | SvREFCNT_dec(hv); |
2762 | } | |
96d7c888 FC |
2763 | if (io && SvREFCNT(io) == 1 && IoIFP(io) |
2764 | && (IoTYPE(io) == IoTYPE_WRONLY || | |
2765 | IoTYPE(io) == IoTYPE_RDWR || | |
2766 | IoTYPE(io) == IoTYPE_APPEND) | |
2767 | && ckWARN_d(WARN_IO) | |
2768 | && IoIFP(io) != PerlIO_stdin() | |
2769 | && IoIFP(io) != PerlIO_stdout() | |
2770 | && IoIFP(io) != PerlIO_stderr() | |
2771 | && !(IoFLAGS(io) & IOf_FAKE_DIRP)) | |
2772 | io_close(io, gv, FALSE, TRUE); | |
b0d55c99 FC |
2773 | SvREFCNT_dec(io); |
2774 | SvREFCNT_dec(cv); | |
2775 | SvREFCNT_dec(form); | |
2776 | ||
bc81b34d FC |
2777 | /* Possibly reallocated by a destructor */ |
2778 | gp = GvGP(gv); | |
2779 | ||
b0d55c99 FC |
2780 | if (!gp->gp_file_hek |
2781 | && !gp->gp_sv | |
2782 | && !gp->gp_av | |
2783 | && !gp->gp_hv | |
2784 | && !gp->gp_io | |
2785 | && !gp->gp_cv | |
2786 | && !gp->gp_form) break; | |
2787 | ||
2788 | if (--attempts == 0) { | |
2789 | Perl_die(aTHX_ | |
2790 | "panic: gp_free failed to free glob pointer - " | |
2791 | "something is repeatedly re-creating entries" | |
2792 | ); | |
2793 | } | |
13207a71 | 2794 | } |
748a9306 | 2795 | |
bc81b34d FC |
2796 | /* Possibly incremented by a destructor doing glob assignment */ |
2797 | if (gp->gp_refcnt > 1) goto borrowed; | |
79072805 | 2798 | Safefree(gp); |
c43ae56f | 2799 | GvGP_set(gv, NULL); |
79072805 LW |
2800 | } |
2801 | ||
d460ef45 NIS |
2802 | int |
2803 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
2804 | { | |
53c1dcc0 AL |
2805 | AMT * const amtp = (AMT*)mg->mg_ptr; |
2806 | PERL_UNUSED_ARG(sv); | |
dd374669 | 2807 | |
7918f24d NC |
2808 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
2809 | ||
d460ef45 NIS |
2810 | if (amtp && AMT_AMAGIC(amtp)) { |
2811 | int i; | |
2812 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 2813 | CV * const cv = amtp->table[i]; |
b37c2d43 | 2814 | if (cv) { |
e7881358 | 2815 | SvREFCNT_dec_NN(MUTABLE_SV(cv)); |
601f1833 | 2816 | amtp->table[i] = NULL; |
d460ef45 NIS |
2817 | } |
2818 | } | |
2819 | } | |
2820 | return 0; | |
2821 | } | |
2822 | ||
a0d0e21e | 2823 | /* Updates and caches the CV's */ |
c3a9a790 RGS |
2824 | /* Returns: |
2825 | * 1 on success and there is some overload | |
2826 | * 0 if there is no overload | |
2827 | * -1 if some error occurred and it couldn't croak | |
2828 | */ | |
a0d0e21e | 2829 | |
c3a9a790 | 2830 | int |
242f8760 | 2831 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e | 2832 | { |
ad64d0ec | 2833 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 | 2834 | AMT amt; |
9b439311 | 2835 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 2836 | U32 newgen; |
a0d0e21e | 2837 | |
7918f24d NC |
2838 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
2839 | ||
9b439311 | 2840 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
2841 | if (mg) { |
2842 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
66978156 | 2843 | if (amtp->was_ok_sub == newgen) { |
8c34e50d | 2844 | return AMT_AMAGIC(amtp) ? 1 : 0; |
14899595 | 2845 | } |
ad64d0ec | 2846 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 | 2847 | } |
a0d0e21e | 2848 | |
bfcb3514 | 2849 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 2850 | |
d460ef45 | 2851 | Zero(&amt,1,AMT); |
e1a479c5 | 2852 | amt.was_ok_sub = newgen; |
a6006777 | 2853 | amt.fallback = AMGfallNO; |
2854 | amt.flags = 0; | |
2855 | ||
a6006777 | 2856 | { |
8c34e50d FC |
2857 | int filled = 0; |
2858 | int i; | |
3d147ac2 DM |
2859 | bool deref_seen = 0; |
2860 | ||
a6006777 | 2861 | |
3866ea3b | 2862 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 2863 | |
89ffc314 | 2864 | /* Try to find via inheritance. */ |
e6919483 | 2865 | GV *gv = gv_fetchmeth_pvn(stash, PL_AMG_names[0], 2, -1, 0); |
3866ea3b | 2866 | SV * const sv = gv ? GvSV(gv) : NULL; |
53c1dcc0 | 2867 | CV* cv; |
89ffc314 IZ |
2868 | |
2869 | if (!gv) | |
3866ea3b FC |
2870 | { |
2871 | if (!gv_fetchmeth_pvn(stash, "((", 2, -1, 0)) | |
8c34e50d | 2872 | goto no_table; |
3866ea3b FC |
2873 | } |
2874 | #ifdef PERL_DONT_CREATE_GVSV | |
2875 | else if (!sv) { | |
6f207bd3 | 2876 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
3866ea3b FC |
2877 | } |
2878 | #endif | |
79c9643d JL |
2879 | else if (SvTRUE(sv)) |
2880 | /* don't need to set overloading here because fallback => 1 | |
2881 | * is the default setting for classes without overloading */ | |
89ffc314 | 2882 | amt.fallback=AMGfallYES; |
79c9643d JL |
2883 | else if (SvOK(sv)) { |
2884 | amt.fallback=AMGfallNEVER; | |
386a5489 | 2885 | filled = 1; |
386a5489 | 2886 | } |
79c9643d | 2887 | else { |
386a5489 | 2888 | filled = 1; |
386a5489 | 2889 | } |
a6006777 | 2890 | |
3d147ac2 | 2891 | assert(SvOOK(stash)); |
3d147ac2 | 2892 | /* initially assume the worst */ |
339441ef | 2893 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_NO_DEREF; |
3d147ac2 | 2894 | |
8c34e50d | 2895 | for (i = 1; i < NofAMmeth; i++) { |
6136c704 | 2896 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 2897 | /* Human-readable form, for debugging: */ |
8c34e50d | 2898 | const char * const cp = AMG_id2name(i); |
d279ab82 | 2899 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 | 2900 | |
a0288114 | 2901 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 2902 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
2903 | /* don't fill the cache while looking up! |
2904 | Creation of inheritance stubs in intermediate packages may | |
2905 | conflict with the logic of runtime method substitution. | |
2906 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
2907 | then we could have created stubs for "(+0" in A and C too. | |
2908 | But if B overloads "bool", we may want to use it for | |
2909 | numifying instead of C's "+0". */ | |
8c34e50d | 2910 | gv = Perl_gv_fetchmeth_pvn(aTHX_ stash, cooky, l, -1, 0); |
46fc3d4c | 2911 | cv = 0; |
c3ad4e54 | 2912 | if (gv && (cv = GvCV(gv)) && CvHASGV(cv)) { |
79656330 | 2913 | const HEK * const gvhek = CvGvNAME_HEK(cv); |
c3ad4e54 FC |
2914 | const HEK * const stashek = |
2915 | HvNAME_HEK(CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv))); | |
b59bf0b2 KW |
2916 | if (memEQs(HEK_KEY(gvhek), HEK_LEN(gvhek), "nil") |
2917 | && stashek | |
2918 | && memEQs(HEK_KEY(stashek), HEK_LEN(stashek), "overload")) { | |
611c1e95 IZ |
2919 | /* This is a hack to support autoloading..., while |
2920 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 2921 | /* GvSV contains the name of the method. */ |
6136c704 | 2922 | GV *ngv = NULL; |
c69033f2 | 2923 | SV *gvsv = GvSV(gv); |
a0288114 | 2924 | |
147e3846 | 2925 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%" SVf256\ |
a0288114 | 2926 | "\" for overloaded \"%s\" in package \"%.256s\"\n", |
f0e9f182 | 2927 | (void*)GvSV(gv), cp, HvNAME(stash)) ); |
c69033f2 | 2928 | if (!gvsv || !SvPOK(gvsv) |
7f415459 | 2929 | || !(ngv = gv_fetchmethod_sv_flags(stash, gvsv, 0))) |
dc848c6f | 2930 | { |
a0288114 | 2931 | /* Can be an import stub (created by "can"). */ |
242f8760 | 2932 | if (destructing) { |
c3a9a790 | 2933 | return -1; |
242f8760 RGS |
2934 | } |
2935 | else { | |
d66cca07 BF |
2936 | const SV * const name = (gvsv && SvPOK(gvsv)) |
2937 | ? gvsv | |
2938 | : newSVpvs_flags("???", SVs_TEMP); | |
dcbac5bb | 2939 | /* diag_listed_as: Can't resolve method "%s" overloading "%s" in package "%s" */ |
147e3846 | 2940 | Perl_croak(aTHX_ "%s method \"%" SVf256 |
d66cca07 | 2941 | "\" overloading \"%s\" "\ |
147e3846 | 2942 | "in package \"%" HEKf256 "\"", |
242f8760 RGS |
2943 | (GvCVGEN(gv) ? "Stub found while resolving" |
2944 | : "Can't resolve"), | |
d66cca07 | 2945 | SVfARG(name), cp, |
d0c0e7dd | 2946 | HEKfARG( |
d66cca07 | 2947 | HvNAME_HEK(stash) |
d0c0e7dd | 2948 | )); |
242f8760 | 2949 | } |
44a8e56a | 2950 | } |
dc848c6f | 2951 | cv = GvCV(gv = ngv); |
44a8e56a | 2952 | } |
b464bac0 | 2953 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 2954 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 2955 | GvNAME(CvGV(cv))) ); |
2956 | filled = 1; | |
611c1e95 | 2957 | } else if (gv) { /* Autoloaded... */ |
ea726b52 | 2958 | cv = MUTABLE_CV(gv); |
611c1e95 | 2959 | filled = 1; |
44a8e56a | 2960 | } |
ea726b52 | 2961 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); |
3d147ac2 DM |
2962 | |
2963 | if (gv) { | |
2964 | switch (i) { | |
2965 | case to_sv_amg: | |
2966 | case to_av_amg: | |
2967 | case to_hv_amg: | |
2968 | case to_gv_amg: | |
2969 | case to_cv_amg: | |
2970 | case nomethod_amg: | |
2971 | deref_seen = 1; | |
2972 | break; | |
2973 | } | |
2974 | } | |
a0d0e21e | 2975 | } |
3d147ac2 | 2976 | if (!deref_seen) |
45479970 DM |
2977 | /* none of @{} etc overloaded; we can do $obj->[N] quicker. |
2978 | * NB - aux var invalid here, HvARRAY() could have been | |
2979 | * reallocated since it was assigned to */ | |
2980 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_NO_DEREF; | |
3d147ac2 | 2981 | |
a0d0e21e | 2982 | if (filled) { |
a6006777 | 2983 | AMT_AMAGIC_on(&amt); |
ad64d0ec | 2984 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2985 | (char*)&amt, sizeof(AMT)); |
8c34e50d | 2986 | return TRUE; |
a0d0e21e LW |
2987 | } |
2988 | } | |
a6006777 | 2989 | /* Here we have no table: */ |
8c34e50d | 2990 | no_table: |
a6006777 | 2991 | AMT_AMAGIC_off(&amt); |
ad64d0ec | 2992 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2993 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 | 2994 | return 0; |
a0d0e21e LW |
2995 | } |
2996 | ||
32251b26 IZ |
2997 | |
2998 | CV* | |
2999 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
3000 | { | |
3f8f4626 | 3001 | MAGIC *mg; |
32251b26 | 3002 | AMT *amtp; |
e1a479c5 | 3003 | U32 newgen; |
9b439311 | 3004 | struct mro_meta* stash_meta; |
32251b26 | 3005 | |
bfcb3514 | 3006 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 3007 | return NULL; |
e1a479c5 | 3008 | |
9b439311 BB |
3009 | stash_meta = HvMROMETA(stash); |
3010 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 3011 | |
ad64d0ec | 3012 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
3013 | if (!mg) { |
3014 | do_update: | |
8c34e50d | 3015 | if (Gv_AMupdate(stash, 0) == -1) |
242f8760 | 3016 | return NULL; |
ad64d0ec | 3017 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 | 3018 | } |
a9fd4e40 | 3019 | assert(mg); |
32251b26 | 3020 | amtp = (AMT*)mg->mg_ptr; |
66978156 | 3021 | if ( amtp->was_ok_sub != newgen ) |
32251b26 | 3022 | goto do_update; |
3ad83ce7 | 3023 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 3024 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
3025 | if (ret && isGV(ret)) { /* Autoloading stab */ |
3026 | /* Passing it through may have resulted in a warning | |
3027 | "Inherited AUTOLOAD for a non-method deprecated", since | |
3028 | our caller is going through a function call, not a method call. | |
3029 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 3030 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
3031 | |
3032 | if (gv && GvCV(gv)) | |
3033 | return GvCV(gv); | |
3034 | } | |
3035 | return ret; | |
3036 | } | |
a0288114 | 3037 | |
601f1833 | 3038 | return NULL; |
32251b26 IZ |
3039 | } |
3040 | ||
3041 | ||
6f1401dc DM |
3042 | /* Implement tryAMAGICun_MG macro. |
3043 | Do get magic, then see if the stack arg is overloaded and if so call it. | |
3044 | Flags: | |
6f1401dc DM |
3045 | AMGf_numeric apply sv_2num to the stack arg. |
3046 | */ | |
3047 | ||
3048 | bool | |
3049 | Perl_try_amagic_un(pTHX_ int method, int flags) { | |
6f1401dc DM |
3050 | dSP; |
3051 | SV* tmpsv; | |
3052 | SV* const arg = TOPs; | |
3053 | ||
3054 | SvGETMAGIC(arg); | |
3055 | ||
9f8bf298 | 3056 | if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method, |
636ac8fc FC |
3057 | AMGf_noright | AMGf_unary |
3058 | | (flags & AMGf_numarg)))) | |
3059 | { | |
13874762 DM |
3060 | /* where the op is of the form: |
3061 | * $lex = $x op $y (where the assign is optimised away) | |
3062 | * then assign the returned value to targ and return that; | |
3063 | * otherwise return the value directly | |
3064 | */ | |
3065 | if ( (PL_opargs[PL_op->op_type] & OA_TARGLEX) | |
3066 | && (PL_op->op_private & OPpTARGET_MY)) | |
3067 | { | |
3068 | dTARGET; | |
3069 | sv_setsv(TARG, tmpsv); | |
3070 | SETTARG; | |
3071 | } | |
3072 | else | |
3073 | SETs(tmpsv); | |
3074 | ||
6f1401dc DM |
3075 | PUTBACK; |
3076 | return TRUE; | |
3077 | } | |
3078 | ||
3079 | if ((flags & AMGf_numeric) && SvROK(arg)) | |
3080 | *sp = sv_2num(arg); | |
3081 | return FALSE; | |
3082 | } | |
3083 | ||
3084 | ||
3085 | /* Implement tryAMAGICbin_MG macro. | |
3086 | Do get magic, then see if the two stack args are overloaded and if so | |
3087 | call it. | |
3088 | Flags: | |
6f1401dc DM |
3089 | AMGf_assign op may be called as mutator (eg +=) |
3090 | AMGf_numeric apply sv_2num to the stack arg. | |
3091 | */ | |
3092 | ||
3093 | bool | |
3094 | Perl_try_amagic_bin(pTHX_ int method, int flags) { | |
6f1401dc DM |
3095 | dSP; |
3096 | SV* const left = TOPm1s; | |
3097 | SV* const right = TOPs; | |
3098 | ||
3099 | SvGETMAGIC(left); | |
3100 | if (left != right) | |
3101 | SvGETMAGIC(right); | |
3102 | ||
3103 | if (SvAMAGIC(left) || SvAMAGIC(right)) { | |
72876cce DM |
3104 | SV * tmpsv; |
3105 | /* STACKED implies mutator variant, e.g. $x += 1 */ | |
3106 | bool mutator = (flags & AMGf_assign) && (PL_op->op_flags & OPf_STACKED); | |
3107 | ||
3108 | tmpsv = amagic_call(left, right, method, | |
3109 | (mutator ? AMGf_assign: 0) | |
636ac8fc | 3110 | | (flags & AMGf_numarg)); |
6f1401dc | 3111 | if (tmpsv) { |
13874762 DM |
3112 | (void)POPs; |
3113 | /* where the op is one of the two forms: | |
3114 | * $x op= $y | |
3115 | * $lex = $x op $y (where the assign is optimised away) | |
3116 | * then assign the returned value to targ and return that; | |
3117 | * otherwise return the value directly | |
3118 | */ | |
3119 | if ( mutator | |
3120 | || ( (PL_opargs[PL_op->op_type] & OA_TARGLEX) | |
3121 | && (PL_op->op_private & OPpTARGET_MY))) | |
3122 | { | |
3123 | dTARG; | |
3124 | TARG = mutator ? *SP : PAD_SV(PL_op->op_targ); | |
3125 | sv_setsv(TARG, tmpsv); | |
3126 | SETTARG; | |
3127 | } | |
3128 | else | |
3129 | SETs(tmpsv); | |
3130 | ||
6f1401dc DM |
3131 | PUTBACK; |
3132 | return TRUE; | |
3133 | } | |
3134 | } | |
13874762 | 3135 | |
75ea7a12 FC |
3136 | if(left==right && SvGMAGICAL(left)) { |
3137 | SV * const left = sv_newmortal(); | |
3138 | *(sp-1) = left; | |
3139 | /* Print the uninitialized warning now, so it includes the vari- | |
3140 | able name. */ | |
3141 | if (!SvOK(right)) { | |
3142 | if (ckWARN(WARN_UNINITIALIZED)) report_uninit(right); | |
3143 | sv_setsv_flags(left, &PL_sv_no, 0); | |
3144 | } | |
3145 | else sv_setsv_flags(left, right, 0); | |
3146 | SvGETMAGIC(right); | |
3147 | } | |
6f1401dc | 3148 | if (flags & AMGf_numeric) { |
75ea7a12 FC |
3149 | if (SvROK(TOPm1s)) |
3150 | *(sp-1) = sv_2num(TOPm1s); | |
6f1401dc DM |
3151 | if (SvROK(right)) |
3152 | *sp = sv_2num(right); | |
3153 | } | |
3154 | return FALSE; | |
3155 | } | |
3156 | ||
25a9ffce NC |
3157 | SV * |
3158 | Perl_amagic_deref_call(pTHX_ SV *ref, int method) { | |
3159 | SV *tmpsv = NULL; | |
3d147ac2 | 3160 | HV *stash; |
25a9ffce NC |
3161 | |
3162 | PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL; | |
3163 | ||
3d147ac2 DM |
3164 | if (!SvAMAGIC(ref)) |
3165 | return ref; | |
3166 | /* return quickly if none of the deref ops are overloaded */ | |
3167 | stash = SvSTASH(SvRV(ref)); | |
3168 | assert(SvOOK(stash)); | |
3169 | if (HvAUX(stash)->xhv_aux_flags & HvAUXf_NO_DEREF) | |
3170 | return ref; | |
3171 | ||
3172 | while ((tmpsv = amagic_call(ref, &PL_sv_undef, method, | |
25a9ffce NC |
3173 | AMGf_noright | AMGf_unary))) { |
3174 | if (!SvROK(tmpsv)) | |
3175 | Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); | |
3176 | if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) { | |
3177 | /* Bail out if it returns us the same reference. */ | |
3178 | return tmpsv; | |
3179 | } | |
3180 | ref = tmpsv; | |
3d147ac2 DM |
3181 | if (!SvAMAGIC(ref)) |
3182 | break; | |
25a9ffce NC |
3183 | } |
3184 | return tmpsv ? tmpsv : ref; | |
3185 | } | |
6f1401dc | 3186 | |
8d569291 FC |
3187 | bool |
3188 | Perl_amagic_is_enabled(pTHX_ int method) | |
3189 | { | |
3190 | SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0); | |
3191 | ||
3192 | assert(PL_curcop->cop_hints & HINT_NO_AMAGIC); | |
3193 | ||
3194 | if ( !lex_mask || !SvOK(lex_mask) ) | |
3195 | /* overloading lexically disabled */ | |
3196 | return FALSE; | |
3197 | else if ( lex_mask && SvPOK(lex_mask) ) { | |
3198 | /* we have an entry in the hints hash, check if method has been | |
3199 | * masked by overloading.pm */ | |
3200 | STRLEN len; | |
3201 | const int offset = method / 8; | |
3202 | const int bit = method % 8; | |
3203 | char *pv = SvPV(lex_mask, len); | |
3204 | ||
3205 | /* Bit set, so this overloading operator is disabled */ | |
3206 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) | |
3207 | return FALSE; | |
3208 | } | |
3209 | return TRUE; | |
3210 | } | |
3211 | ||
a0d0e21e | 3212 | SV* |
864dbfa3 | 3213 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 3214 | { |
b267980d | 3215 | MAGIC *mg; |
9c5ffd7c | 3216 | CV *cv=NULL; |
a0d0e21e | 3217 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 3218 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
3219 | int off = 0, off1, lr = 0, notfound = 0; |
3220 | int postpr = 0, force_cpy = 0; | |
3221 | int assign = AMGf_assign & flags; | |
3222 | const int assignshift = assign ? 1 : 0; | |
bf5522a1 | 3223 | int use_default_op = 0; |
67288365 | 3224 | int force_scalar = 0; |
497b47a8 JH |
3225 | #ifdef DEBUGGING |
3226 | int fl=0; | |
497b47a8 | 3227 | #endif |
25716404 | 3228 | HV* stash=NULL; |
7918f24d NC |
3229 | |
3230 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
3231 | ||
e46c382e | 3232 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
8d569291 | 3233 | if (!amagic_is_enabled(method)) return NULL; |
e46c382e YK |
3234 | } |
3235 | ||
a0d0e21e | 3236 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
0a2c84ab | 3237 | && (stash = SvSTASH(SvRV(left))) && Gv_AMG(stash) |
ad64d0ec | 3238 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 3239 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 3240 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 3241 | : NULL)) |
b267980d | 3242 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
3243 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
3244 | * usual method */ | |
497b47a8 JH |
3245 | ( |
3246 | #ifdef DEBUGGING | |
3247 | fl = 1, | |
a0288114 | 3248 | #endif |
497b47a8 | 3249 | cv = cvp[off=method])))) { |
a0d0e21e LW |
3250 | lr = -1; /* Call method for left argument */ |
3251 | } else { | |
3252 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
3253 | int logic; | |
3254 | ||
3255 | /* look for substituted methods */ | |
ee239bfe | 3256 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
3257 | switch (method) { |
3258 | case inc_amg: | |
ee239bfe IZ |
3259 | force_cpy = 1; |
3260 | if ((cv = cvp[off=add_ass_amg]) | |
3261 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 3262 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
3263 | } |
3264 | break; | |
3265 | case dec_amg: | |
ee239bfe IZ |
3266 | force_cpy = 1; |
3267 | if ((cv = cvp[off = subtr_ass_amg]) | |
3268 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 3269 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
3270 | } |
3271 | break; | |
3272 | case bool__amg: | |
3273 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
3274 | break; | |
3275 | case numer_amg: | |
3276 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
3277 | break; | |
3278 | case string_amg: | |
3279 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
3280 | break; | |
b7787f18 AL |
3281 | case not_amg: |
3282 | (void)((cv = cvp[off=bool__amg]) | |
3283 | || (cv = cvp[off=numer_amg]) | |
3284 | || (cv = cvp[off=string_amg])); | |
2ab54efd MB |
3285 | if (cv) |
3286 | postpr = 1; | |
b7787f18 | 3287 | break; |
748a9306 LW |
3288 | case copy_amg: |
3289 | { | |
76e3520e GS |
3290 | /* |
3291 | * SV* ref causes confusion with the interpreter variable of | |
3292 | * the same name | |
3293 | */ | |
890ce7af | 3294 | SV* const tmpRef=SvRV(left); |
76e3520e | 3295 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 3296 | /* |
3297 | * Just to be extra cautious. Maybe in some | |
3298 | * additional cases sv_setsv is safe, too. | |
3299 | */ | |
890ce7af | 3300 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 3301 | SvOBJECT_on(newref); |
a1cd65be FC |
3302 | /* No need to do SvAMAGIC_on here, as SvAMAGIC macros |
3303 | delegate to the stash. */ | |
85fbaab2 | 3304 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); |
748a9306 LW |
3305 | return newref; |
3306 | } | |
3307 | } | |
3308 | break; | |
a0d0e21e | 3309 | case abs_amg: |
b267980d | 3310 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 3311 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
725c44f9 | 3312 | SV* const nullsv=&PL_sv_zero; |
a0d0e21e | 3313 | if (off1==lt_amg) { |
890ce7af | 3314 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e | 3315 | lt_amg,AMGf_noright); |
f4c975aa | 3316 | logic = SvTRUE_NN(lessp); |
a0d0e21e | 3317 | } else { |
890ce7af | 3318 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
3319 | ncmp_amg,AMGf_noright); |
3320 | logic = (SvNV(lessp) < 0); | |
3321 | } | |
3322 | if (logic) { | |
3323 | if (off==subtr_amg) { | |
3324 | right = left; | |
748a9306 | 3325 | left = nullsv; |
a0d0e21e LW |
3326 | lr = 1; |
3327 | } | |
3328 | } else { | |
3329 | return left; | |
3330 | } | |
3331 | } | |
3332 | break; | |
3333 | case neg_amg: | |
155aba94 | 3334 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e | 3335 | right = left; |
725c44f9 | 3336 | left = &PL_sv_zero; |
a0d0e21e LW |
3337 | lr = 1; |
3338 | } | |
3339 | break; | |
f216259d | 3340 | case int_amg: |
f5284f61 | 3341 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
c4c7412c | 3342 | case ftest_amg: /* XXXX Eventually should do to_gv. */ |
d4b87e75 | 3343 | case regexp_amg: |
b267980d NIS |
3344 | /* FAIL safe */ |
3345 | return NULL; /* Delegate operation to standard mechanisms. */ | |
81d52ecd | 3346 | |
f5284f61 IZ |
3347 | case to_sv_amg: |
3348 | case to_av_amg: | |
3349 | case to_hv_amg: | |
3350 | case to_gv_amg: | |
3351 | case to_cv_amg: | |
3352 | /* FAIL safe */ | |
b267980d | 3353 | return left; /* Delegate operation to standard mechanisms. */ |
81d52ecd | 3354 | |
a0d0e21e LW |
3355 | default: |
3356 | goto not_found; | |
3357 | } | |
3358 | if (!cv) goto not_found; | |
3359 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
0a2c84ab | 3360 | && (stash = SvSTASH(SvRV(right))) && Gv_AMG(stash) |
ad64d0ec | 3361 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 3362 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 3363 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 3364 | : NULL)) |
69815d08 RS |
3365 | && (cv = cvp[off=method])) { /* Method for right |
3366 | * argument found */ | |
3367 | lr=1; | |
bf5522a1 MB |
3368 | } else if (((cvp && amtp->fallback > AMGfallNEVER) |
3369 | || (ocvp && oamtp->fallback > AMGfallNEVER)) | |
a0d0e21e LW |
3370 | && !(flags & AMGf_unary)) { |
3371 | /* We look for substitution for | |
3372 | * comparison operations and | |
fc36a67e | 3373 | * concatenation */ |
a0d0e21e LW |
3374 | if (method==concat_amg || method==concat_ass_amg |
3375 | || method==repeat_amg || method==repeat_ass_amg) { | |
3376 | return NULL; /* Delegate operation to string conversion */ | |
3377 | } | |
3378 | off = -1; | |
3379 | switch (method) { | |
3380 | case lt_amg: | |
3381 | case le_amg: | |
3382 | case gt_amg: | |
3383 | case ge_amg: | |
3384 | case eq_amg: | |
3385 | case ne_amg: | |
2ab54efd MB |
3386 | off = ncmp_amg; |
3387 | break; | |
a0d0e21e LW |
3388 | case slt_amg: |
3389 | case sle_amg: | |
3390 | case sgt_amg: | |
3391 | case sge_amg: | |
3392 | case seq_amg: | |
3393 | case sne_amg: | |
2ab54efd MB |
3394 | off = scmp_amg; |
3395 | break; | |
a0d0e21e | 3396 | } |
bf5522a1 MB |
3397 | if (off != -1) { |
3398 | if (ocvp && (oamtp->fallback > AMGfallNEVER)) { | |
3399 | cv = ocvp[off]; | |
3400 | lr = -1; | |
3401 | } | |
3402 | if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) { | |
3403 | cv = cvp[off]; | |
3404 | lr = 1; | |
3405 | } | |
3406 | } | |
3407 | if (cv) | |
2ab54efd MB |
3408 | postpr = 1; |
3409 | else | |
3410 | goto not_found; | |
a0d0e21e | 3411 | } else { |
a6006777 | 3412 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
3413 | switch (method) { |
3414 | case to_sv_amg: | |
3415 | case to_av_amg: | |
3416 | case to_hv_amg: | |
3417 | case to_gv_amg: | |
3418 | case to_cv_amg: | |
3419 | /* FAIL safe */ | |
3420 | return left; /* Delegate operation to standard mechanisms. */ | |
b267980d | 3421 | } |
a0d0e21e LW |
3422 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
3423 | notfound = 1; lr = -1; | |
3424 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
3425 | notfound = 1; lr = 1; | |
bf5522a1 MB |
3426 | } else if ((use_default_op = |
3427 | (!ocvp || oamtp->fallback >= AMGfallYES) | |
3428 | && (!cvp || amtp->fallback >= AMGfallYES)) | |
3429 | && !DEBUG_o_TEST) { | |
4cc0ca18 NC |
3430 | /* Skip generating the "no method found" message. */ |
3431 | return NULL; | |
a0d0e21e | 3432 | } else { |
46fc3d4c | 3433 | SV *msg; |
774d564b | 3434 | if (off==-1) off=method; |
b267980d | 3435 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
147e3846 | 3436 | "Operation \"%s\": no method found,%sargument %s%" SVf "%s%" SVf, |
d66cca07 BF |
3437 | AMG_id2name(method + assignshift), |
3438 | (flags & AMGf_unary ? " " : "\n\tleft "), | |
3439 | SvAMAGIC(left)? | |
3440 | "in overloaded package ": | |
3441 | "has no overloaded magic", | |
3442 | SvAMAGIC(left)? | |
3443 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(left)))))): | |
3444 | SVfARG(&PL_sv_no), | |
3445 | SvAMAGIC(right)? | |
3446 | ",\n\tright argument in overloaded package ": | |
3447 | (flags & AMGf_unary | |
3448 | ? "" | |
3449 | : ",\n\tright argument has no overloaded magic"), | |
3450 | SvAMAGIC(right)? | |
3451 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(right)))))): | |
3452 | SVfARG(&PL_sv_no))); | |
bf5522a1 | 3453 | if (use_default_op) { |
147e3846 | 3454 | DEBUG_o( Perl_deb(aTHX_ "%" SVf, SVfARG(msg)) ); |
a0d0e21e | 3455 | } else { |
147e3846 | 3456 | Perl_croak(aTHX_ "%" SVf, SVfARG(msg)); |
a0d0e21e LW |
3457 | } |
3458 | return NULL; | |
3459 | } | |
ee239bfe | 3460 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
3461 | } |
3462 | } | |
67288365 JL |
3463 | |
3464 | switch (method) { | |
3465 | /* in these cases, we're calling '+' or '-' as a fallback for a ++ or -- | |
3466 | * operation. we need this to return a value, so that it can be assigned | |
3467 | * later on, in the postpr block (case inc_amg/dec_amg), even if the | |
3468 | * increment or decrement was itself called in void context */ | |
3469 | case inc_amg: | |
3470 | if (off == add_amg) | |
3471 | force_scalar = 1; | |
3472 | break; | |
3473 | case dec_amg: | |
3474 | if (off == subtr_amg) | |
3475 | force_scalar = 1; | |
3476 | break; | |
3477 | /* in these cases, we're calling an assignment variant of an operator | |
3478 | * (+= rather than +, for instance). regardless of whether it's a | |
3479 | * fallback or not, it always has to return a value, which will be | |
3480 | * assigned to the proper variable later */ | |
3481 | case add_amg: | |
3482 | case subtr_amg: | |
3483 | case mult_amg: | |
3484 | case div_amg: | |
3485 | case modulo_amg: | |
3486 | case pow_amg: | |
3487 | case lshift_amg: | |
3488 | case rshift_amg: | |
3489 | case repeat_amg: | |
3490 | case concat_amg: | |
3491 | case band_amg: | |
3492 | case bor_amg: | |
3493 | case bxor_amg: | |
6d06ecce FC |
3494 | case sband_amg: |
3495 | case sbor_amg: | |
3496 | case sbxor_amg: | |
67288365 JL |
3497 | if (assign) |
3498 | force_scalar = 1; | |
3499 | break; | |
3500 | /* the copy constructor always needs to return a value */ | |
3501 | case copy_amg: | |
3502 | force_scalar = 1; | |
3503 | break; | |
3504 | /* because of the way these are implemented (they don't perform the | |
3505 | * dereferencing themselves, they return a reference that perl then | |
3506 | * dereferences later), they always have to be in scalar context */ | |
3507 | case to_sv_amg: | |
3508 | case to_av_amg: | |
3509 | case to_hv_amg: | |
3510 | case to_gv_amg: | |
3511 | case to_cv_amg: | |
3512 | force_scalar = 1; | |
3513 | break; | |
3514 | /* these don't have an op of their own; they're triggered by their parent | |
3515 | * op, so the context there isn't meaningful ('$a and foo()' in void | |
3516 | * context still needs to pass scalar context on to $a's bool overload) */ | |
3517 | case bool__amg: | |
3518 | case numer_amg: | |
3519 | case string_amg: | |
3520 | force_scalar = 1; | |
3521 | break; | |
3522 | } | |
3523 | ||
497b47a8 | 3524 | #ifdef DEBUGGING |
a0d0e21e | 3525 | if (!notfound) { |
497b47a8 | 3526 | DEBUG_o(Perl_deb(aTHX_ |
147e3846 | 3527 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %" SVf "%s\n", |
497b47a8 JH |
3528 | AMG_id2name(off), |
3529 | method+assignshift==off? "" : | |
a0288114 | 3530 | " (initially \"", |
497b47a8 JH |
3531 | method+assignshift==off? "" : |
3532 | AMG_id2name(method+assignshift), | |
a0288114 | 3533 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
3534 | flags & AMGf_unary? "" : |
3535 | lr==1 ? " for right argument": " for left argument", | |
3536 | flags & AMGf_unary? " for argument" : "", | |
d66cca07 | 3537 | stash ? SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(stash)))) : SVfARG(newSVpvs_flags("null", SVs_TEMP)), |
497b47a8 | 3538 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 3539 | } |
497b47a8 | 3540 | #endif |
748a9306 LW |
3541 | /* Since we use shallow copy during assignment, we need |
3542 | * to dublicate the contents, probably calling user-supplied | |
3543 | * version of copy operator | |
3544 | */ | |
ee239bfe IZ |
3545 | /* We need to copy in following cases: |
3546 | * a) Assignment form was called. | |
3547 | * assignshift==1, assign==T, method + 1 == off | |
3548 | * b) Increment or decrement, called directly. | |
3549 | * assignshift==0, assign==0, method + 0 == off | |
3550 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 3551 | * assignshift==0, assign==T, |
ee239bfe IZ |
3552 | * force_cpy == T |
3553 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 3554 | * assignshift==0, assign==0, |
ee239bfe IZ |
3555 | * force_cpy == T |
3556 | * e) Assignment form translated to nomethod. | |
3557 | * assignshift==1, assign==T, method + 1 != off | |
3558 | * force_cpy == T | |
3559 | */ | |
3560 | /* off is method, method+assignshift, or a result of opcode substitution. | |
3561 | * In the latter case assignshift==0, so only notfound case is important. | |
3562 | */ | |
73512201 | 3563 | if ( (lr == -1) && ( ( (method + assignshift == off) |
ee239bfe | 3564 | && (assign || (method == inc_amg) || (method == dec_amg))) |
73512201 | 3565 | || force_cpy) ) |
6f1401dc | 3566 | { |
1b38c28e NC |
3567 | /* newSVsv does not behave as advertised, so we copy missing |
3568 | * information by hand */ | |
3569 | SV *tmpRef = SvRV(left); | |
3570 | SV *rv_copy; | |
31d632c3 | 3571 | if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) { |
1b38c28e NC |
3572 | SvRV_set(left, rv_copy); |
3573 | SvSETMAGIC(left); | |
e7881358 | 3574 | SvREFCNT_dec_NN(tmpRef); |
1b38c28e | 3575 | } |
6f1401dc DM |
3576 | } |
3577 | ||
a0d0e21e LW |
3578 | { |
3579 | dSP; | |
3580 | BINOP myop; | |
3581 | SV* res; | |
b7787f18 | 3582 | const bool oldcatch = CATCH_GET; |
67288365 | 3583 | I32 oldmark, nret; |
e839e6ed DM |
3584 | /* for multiconcat, we may call overload several times, |
3585 | * with the context of individual concats being scalar, | |
3586 | * regardless of the overall context of the multiconcat op | |
3587 | */ | |
3588 | U8 gimme = (force_scalar || PL_op->op_type == OP_MULTICONCAT) | |
3589 | ? G_SCALAR : GIMME_V; | |
a0d0e21e | 3590 | |
54310121 | 3591 | CATCH_SET(TRUE); |
a0d0e21e LW |
3592 | Zero(&myop, 1, BINOP); |
3593 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 3594 | myop.op_next = NULL; |
67288365 JL |
3595 | myop.op_flags = OPf_STACKED; |
3596 | ||
3597 | switch (gimme) { | |
3598 | case G_VOID: | |
3599 | myop.op_flags |= OPf_WANT_VOID; | |
3600 | break; | |
3601 | case G_ARRAY: | |
3602 | if (flags & AMGf_want_list) { | |
3603 | myop.op_flags |= OPf_WANT_LIST; | |
3604 | break; | |
3605 | } | |
3606 | /* FALLTHROUGH */ | |
3607 | default: | |
3608 | myop.op_flags |= OPf_WANT_SCALAR; | |
3609 | break; | |
3610 | } | |
a0d0e21e | 3611 | |
e788e7d3 | 3612 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 3613 | ENTER; |
462e5cf6 | 3614 | SAVEOP(); |
533c011a | 3615 | PL_op = (OP *) &myop; |
3280af22 | 3616 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 3617 | PL_op->op_private |= OPpENTERSUB_DB; |
897d3989 | 3618 | Perl_pp_pushmark(aTHX); |
a0d0e21e | 3619 | |
924508f0 | 3620 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
3621 | PUSHs(lr>0? right: left); |
3622 | PUSHs(lr>0? left: right); | |
3280af22 | 3623 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 3624 | if (notfound) { |
59cd0e26 NC |
3625 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
3626 | AMG_id2namelen(method + assignshift), SVs_TEMP)); | |
a0d0e21e | 3627 | } |
636ac8fc FC |
3628 | else if (flags & AMGf_numarg) |
3629 | PUSHs(&PL_sv_undef); | |
3630 | if (flags & AMGf_numarg) | |
3631 | PUSHs(&PL_sv_yes); | |
ad64d0ec | 3632 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e | 3633 | PUTBACK; |
67288365 | 3634 | oldmark = TOPMARK; |
a0d0e21e | 3635 | |
139d0ce6 | 3636 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 | 3637 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
3638 | LEAVE; |
3639 | SPAGAIN; | |
67288365 JL |
3640 | nret = SP - (PL_stack_base + oldmark); |
3641 | ||
3642 | switch (gimme) { | |
3643 | case G_VOID: | |
3644 | /* returning NULL has another meaning, and we check the context | |
3645 | * at the call site too, so this can be differentiated from the | |
3646 | * scalar case */ | |
3647 | res = &PL_sv_undef; | |
3648 | SP = PL_stack_base + oldmark; | |
3649 | break; | |
2165bd23 | 3650 | case G_ARRAY: |
67288365 JL |
3651 | if (flags & AMGf_want_list) { |
3652 | res = sv_2mortal((SV *)newAV()); | |
3653 | av_extend((AV *)res, nret); | |
3654 | while (nret--) | |
3655 | av_store((AV *)res, nret, POPs); | |
3656 | break; | |
3657 | } | |
3658 | /* FALLTHROUGH */ | |
67288365 JL |
3659 | default: |
3660 | res = POPs; | |
3661 | break; | |
3662 | } | |
a0d0e21e | 3663 | |
ebafeae7 | 3664 | PUTBACK; |
d3acc0f7 | 3665 | POPSTACK; |
54310121 | 3666 | CATCH_SET(oldcatch); |
a0d0e21e | 3667 | |
a0d0e21e | 3668 | if (postpr) { |
b7787f18 | 3669 | int ans; |
a0d0e21e LW |
3670 | switch (method) { |
3671 | case le_amg: | |
3672 | case sle_amg: | |
3673 | ans=SvIV(res)<=0; break; | |
3674 | case lt_amg: | |
3675 | case slt_amg: | |
3676 | ans=SvIV(res)<0; break; | |
3677 | case ge_amg: | |
3678 | case sge_amg: | |
3679 | ans=SvIV(res)>=0; break; | |
3680 | case gt_amg: | |
3681 | case sgt_amg: | |
3682 | ans=SvIV(res)>0; break; | |
3683 | case eq_amg: | |
3684 | case seq_amg: | |
3685 | ans=SvIV(res)==0; break; | |
3686 | case ne_amg: | |
3687 | case sne_amg: | |
3688 | ans=SvIV(res)!=0; break; | |
3689 | case inc_amg: | |
3690 | case dec_amg: | |
bbce6d69 | 3691 | SvSetSV(left,res); return left; |
dc437b57 | 3692 | case not_amg: |
f4c975aa | 3693 | ans=!SvTRUE_NN(res); break; |
b7787f18 AL |
3694 | default: |
3695 | ans=0; break; | |
a0d0e21e | 3696 | } |
54310121 | 3697 | return boolSV(ans); |
748a9306 LW |
3698 | } else if (method==copy_amg) { |
3699 | if (!SvROK(res)) { | |
cea2e8a9 | 3700 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
3701 | } |
3702 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
3703 | } else { |
3704 | return res; | |
3705 | } | |
3706 | } | |
3707 | } | |
c9d5ac95 | 3708 | |
f5c1e807 NC |
3709 | void |
3710 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
3711 | { | |
acda4c6a | 3712 | U32 hash; |
f5c1e807 | 3713 | |
7918f24d | 3714 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 | 3715 | |
acda4c6a | 3716 | if (len > I32_MAX) |
147e3846 | 3717 | Perl_croak(aTHX_ "panic: gv name too long (%" UVuf ")", (UV) len); |
acda4c6a | 3718 | |
ae8cc45f NC |
3719 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
3720 | unshare_hek(GvNAME_HEK(gv)); | |
3721 | } | |
3722 | ||
acda4c6a | 3723 | PERL_HASH(hash, name, len); |
c60dbbc3 | 3724 | GvNAME_HEK(gv) = share_hek(name, (flags & SVf_UTF8 ? -(I32)len : (I32)len), hash); |
f5c1e807 NC |
3725 | } |
3726 | ||
66610fdd | 3727 | /* |
f7461760 Z |
3728 | =for apidoc gv_try_downgrade |
3729 | ||
2867cdbc Z |
3730 | If the typeglob C<gv> can be expressed more succinctly, by having |
3731 | something other than a real GV in its place in the stash, replace it | |
3732 | with the optimised form. Basic requirements for this are that C<gv> | |
3733 | is a real typeglob, is sufficiently ordinary, and is only referenced | |
3734 | from its package. This function is meant to be used when a GV has been | |
3735 | looked up in part to see what was there, causing upgrading, but based | |
3736 | on what was found it turns out that the real GV isn't required after all. | |
3737 | ||
3738 | If C<gv> is a completely empty typeglob, it is deleted from the stash. | |
3739 | ||
3740 | If C<gv> is a typeglob containing only a sufficiently-ordinary constant | |
3741 | sub, the typeglob is replaced with a scalar-reference placeholder that | |
3742 | more compactly represents the same thing. | |
f7461760 Z |
3743 | |
3744 | =cut | |
3745 | */ | |
3746 | ||
3747 | void | |
3748 | Perl_gv_try_downgrade(pTHX_ GV *gv) | |
3749 | { | |
3750 | HV *stash; | |
3751 | CV *cv; | |
3752 | HEK *namehek; | |
3753 | SV **gvp; | |
3754 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; | |
95f56751 FC |
3755 | |
3756 | /* XXX Why and where does this leave dangling pointers during global | |
3757 | destruction? */ | |
627364f1 | 3758 | if (PL_phase == PERL_PHASE_DESTRUCT) return; |
95f56751 | 3759 | |
2867cdbc | 3760 | if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
803f2748 | 3761 | !SvOBJECT(gv) && !SvREADONLY(gv) && |
f7461760 | 3762 | isGV_with_GP(gv) && GvGP(gv) && |
2867cdbc | 3763 | !GvINTRO(gv) && GvREFCNT(gv) == 1 && |
f7461760 | 3764 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && |
099be4f1 | 3765 | GvEGVx(gv) == gv && (stash = GvSTASH(gv)))) |
2867cdbc | 3766 | return; |
2be08ad1 FC |
3767 | if (gv == PL_statgv || gv == PL_last_in_gv || gv == PL_stderrgv) |
3768 | return; | |
803f2748 DM |
3769 | if (SvMAGICAL(gv)) { |
3770 | MAGIC *mg; | |
3771 | /* only backref magic is allowed */ | |
3772 | if (SvGMAGICAL(gv) || SvSMAGICAL(gv)) | |
3773 | return; | |
3774 | for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) { | |
3775 | if (mg->mg_type != PERL_MAGIC_backref) | |
3776 | return; | |
3777 | } | |
3778 | } | |
2867cdbc Z |
3779 | cv = GvCV(gv); |
3780 | if (!cv) { | |
3781 | HEK *gvnhek = GvNAME_HEK(gv); | |
0ca9877d | 3782 | (void)hv_deletehek(stash, gvnhek, G_DISCARD); |
8941bf97 | 3783 | } else if (GvMULTI(gv) && cv && SvREFCNT(cv) == 1 && |
f7461760 | 3784 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
34d81fc4 | 3785 | CvSTASH(cv) == stash && !CvNAMED(cv) && CvGV(cv) == gv && |
f7461760 Z |
3786 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && |
3787 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && | |
3788 | (namehek = GvNAME_HEK(gv)) && | |
48c2c411 | 3789 | (gvp = hv_fetchhek(stash, namehek, 0)) && |
f7461760 Z |
3790 | *gvp == (SV*)gv) { |
3791 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); | |
70e5f2b5 | 3792 | const bool imported = !!GvIMPORTED_CV(gv); |
f7461760 Z |
3793 | SvREFCNT(gv) = 0; |
3794 | sv_clear((SV*)gv); | |
3795 | SvREFCNT(gv) = 1; | |
70e5f2b5 | 3796 | SvFLAGS(gv) = SVt_IV|SVf_ROK|SVprv_PCS_IMPORTED * imported; |
dc6369ef EH |
3797 | |
3798 | /* See also: 'SET_SVANY_FOR_BODYLESS_IV' in sv.c */ | |
f7461760 Z |
3799 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - |
3800 | STRUCT_OFFSET(XPVIV, xiv_iv)); | |
3801 | SvRV_set(gv, value); | |
3802 | } | |
3803 | } | |
3804 | ||
9e3fb20c FC |
3805 | GV * |
3806 | Perl_gv_override(pTHX_ const char * const name, const STRLEN len) | |
3807 | { | |
3808 | GV *gv = gv_fetchpvn(name, len, GV_NOTQUAL, SVt_PVCV); | |
3809 | GV * const *gvp; | |
3810 | PERL_ARGS_ASSERT_GV_OVERRIDE; | |
3811 | if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) return gv; | |
3812 | gvp = (GV**)hv_fetch(PL_globalstash, name, len, FALSE); | |
3813 | gv = gvp ? *gvp : NULL; | |
3814 | if (gv && !isGV(gv)) { | |
3815 | if (!SvPCS_IMPORTED(gv)) return NULL; | |
3816 | gv_init(gv, PL_globalstash, name, len, 0); | |
3817 | return gv; | |
3818 | } | |
3819 | return gv && GvCVu(gv) && GvIMPORTED_CV(gv) ? gv : NULL; | |
3820 | } | |
3821 | ||
4aaa4757 FC |
3822 | #include "XSUB.h" |
3823 | ||
3824 | static void | |
3825 | core_xsub(pTHX_ CV* cv) | |
3826 | { | |
3827 | Perl_croak(aTHX_ | |
3828 | "&CORE::%s cannot be called directly", GvNAME(CvGV(cv)) | |
3829 | ); | |
3830 | } | |
3831 | ||
f7461760 | 3832 | /* |
14d04a33 | 3833 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3834 | */ |