Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
1129b882 | 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
67fbe0e1 | 4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others |
79072805 LW |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
a0d0e21e LW |
9 | */ |
10 | ||
11 | /* | |
12 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure | |
4ac71550 | 13 | * of your inquisitiveness, I shall spend all the rest of my days in answering |
a0d0e21e LW |
14 | * you. What more do you want to know?' |
15 | * 'The names of all the stars, and of all living things, and the whole | |
16 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' | |
17 | * laughed Pippin. | |
4ac71550 | 18 | * |
cdad3b53 | 19 | * [p.599 of _The Lord of the Rings_, III/xi: "The PalantÃr"] |
79072805 LW |
20 | */ |
21 | ||
ccfc67b7 JH |
22 | /* |
23 | =head1 GV Functions | |
166f8a29 DM |
24 | |
25 | A GV is a structure which corresponds to to a Perl typeglob, ie *foo. | |
26 | It is a structure that holds a pointer to a scalar, an array, a hash etc, | |
27 | corresponding to $foo, @foo, %foo. | |
28 | ||
29 | GVs are usually found as values in stashes (symbol table hashes) where | |
30 | Perl stores its global variables. | |
31 | ||
32 | =cut | |
ccfc67b7 JH |
33 | */ |
34 | ||
79072805 | 35 | #include "EXTERN.h" |
864dbfa3 | 36 | #define PERL_IN_GV_C |
79072805 | 37 | #include "perl.h" |
8261f8eb | 38 | #include "overload.c" |
4aaa4757 | 39 | #include "keywords.h" |
79072805 | 40 | |
f54cb97a AL |
41 | static const char S_autoload[] = "AUTOLOAD"; |
42 | static const STRLEN S_autolen = sizeof(S_autoload)-1; | |
5c7983e5 | 43 | |
c69033f2 | 44 | GV * |
d5713896 | 45 | Perl_gv_add_by_type(pTHX_ GV *gv, svtype type) |
c69033f2 | 46 | { |
d5713896 | 47 | SV **where; |
7918f24d | 48 | |
13be902c FC |
49 | if ( |
50 | !gv | |
51 | || ( | |
52 | SvTYPE((const SV *)gv) != SVt_PVGV | |
53 | && SvTYPE((const SV *)gv) != SVt_PVLV | |
54 | ) | |
55 | ) { | |
bb85b28a NC |
56 | const char *what; |
57 | if (type == SVt_PVIO) { | |
58 | /* | |
59 | * if it walks like a dirhandle, then let's assume that | |
60 | * this is a dirhandle. | |
61 | */ | |
332c2eac | 62 | what = OP_IS_DIRHOP(PL_op->op_type) ? |
bb85b28a NC |
63 | "dirhandle" : "filehandle"; |
64 | /* diag_listed_as: Bad symbol for filehandle */ | |
65 | } else if (type == SVt_PVHV) { | |
66 | what = "hash"; | |
67 | } else { | |
68 | what = type == SVt_PVAV ? "array" : "scalar"; | |
69 | } | |
70 | Perl_croak(aTHX_ "Bad symbol for %s", what); | |
71 | } | |
d5713896 NC |
72 | |
73 | if (type == SVt_PVHV) { | |
74 | where = (SV **)&GvHV(gv); | |
75 | } else if (type == SVt_PVAV) { | |
76 | where = (SV **)&GvAV(gv); | |
bb85b28a NC |
77 | } else if (type == SVt_PVIO) { |
78 | where = (SV **)&GvIOp(gv); | |
d5713896 NC |
79 | } else { |
80 | where = &GvSV(gv); | |
81 | } | |
7918f24d | 82 | |
d5713896 NC |
83 | if (!*where) |
84 | *where = newSV_type(type); | |
79072805 LW |
85 | return gv; |
86 | } | |
87 | ||
88 | GV * | |
864dbfa3 | 89 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 90 | { |
7918f24d | 91 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec NC |
92 | return gv_fetchfile_flags(name, strlen(name), 0); |
93 | } | |
94 | ||
95 | GV * | |
96 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
97 | const U32 flags) | |
98 | { | |
97aff369 | 99 | dVAR; |
4116122e | 100 | char smallbuf[128]; |
53d95988 | 101 | char *tmpbuf; |
d9095cec | 102 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
103 | GV *gv; |
104 | ||
7918f24d | 105 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec NC |
106 | PERL_UNUSED_ARG(flags); |
107 | ||
1d7c1841 | 108 | if (!PL_defstash) |
a0714e2c | 109 | return NULL; |
1d7c1841 | 110 | |
d9095cec | 111 | if (tmplen <= sizeof smallbuf) |
53d95988 CS |
112 | tmpbuf = smallbuf; |
113 | else | |
798b63bc | 114 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 115 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
116 | tmpbuf[0] = '_'; |
117 | tmpbuf[1] = '<'; | |
d9095cec NC |
118 | memcpy(tmpbuf + 2, name, namelen); |
119 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); | |
1d7c1841 | 120 | if (!isGV(gv)) { |
d9095cec | 121 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 | 122 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec | 123 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 124 | #else |
d9095cec | 125 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 126 | #endif |
1d7c1841 | 127 | } |
5a9a79a4 FC |
128 | if ((PERLDB_LINE || PERLDB_SAVESRC) && !GvAV(gv)) |
129 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); | |
53d95988 CS |
130 | if (tmpbuf != smallbuf) |
131 | Safefree(tmpbuf); | |
79072805 LW |
132 | return gv; |
133 | } | |
134 | ||
62d55b22 NC |
135 | /* |
136 | =for apidoc gv_const_sv | |
137 | ||
138 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
139 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
140 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
141 | NULL. | |
142 | ||
143 | =cut | |
144 | */ | |
145 | ||
146 | SV * | |
147 | Perl_gv_const_sv(pTHX_ GV *gv) | |
148 | { | |
7918f24d NC |
149 | PERL_ARGS_ASSERT_GV_CONST_SV; |
150 | ||
62d55b22 NC |
151 | if (SvTYPE(gv) == SVt_PVGV) |
152 | return cv_const_sv(GvCVu(gv)); | |
153 | return SvROK(gv) ? SvRV(gv) : NULL; | |
154 | } | |
155 | ||
12816592 NC |
156 | GP * |
157 | Perl_newGP(pTHX_ GV *const gv) | |
158 | { | |
159 | GP *gp; | |
19bad673 NC |
160 | U32 hash; |
161 | #ifdef USE_ITHREADS | |
1df5f7c1 NC |
162 | const char *const file |
163 | = (PL_curcop && CopFILE(PL_curcop)) ? CopFILE(PL_curcop) : ""; | |
19bad673 NC |
164 | const STRLEN len = strlen(file); |
165 | #else | |
166 | SV *const temp_sv = CopFILESV(PL_curcop); | |
167 | const char *file; | |
168 | STRLEN len; | |
169 | ||
7918f24d NC |
170 | PERL_ARGS_ASSERT_NEWGP; |
171 | ||
19bad673 NC |
172 | if (temp_sv) { |
173 | file = SvPVX(temp_sv); | |
174 | len = SvCUR(temp_sv); | |
175 | } else { | |
176 | file = ""; | |
177 | len = 0; | |
178 | } | |
179 | #endif | |
f4890806 NC |
180 | |
181 | PERL_HASH(hash, file, len); | |
182 | ||
12816592 NC |
183 | Newxz(gp, 1, GP); |
184 | ||
185 | #ifndef PERL_DONT_CREATE_GVSV | |
b5c2dcb8 | 186 | gp->gp_sv = newSV(0); |
12816592 NC |
187 | #endif |
188 | ||
1df5f7c1 | 189 | gp->gp_line = PL_curcop ? CopLINE(PL_curcop) : 0; |
12816592 NC |
190 | /* XXX Ideally this cast would be replaced with a change to const char* |
191 | in the struct. */ | |
f4890806 | 192 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
193 | gp->gp_egv = gv; |
194 | gp->gp_refcnt = 1; | |
195 | ||
196 | return gp; | |
197 | } | |
198 | ||
803f2748 DM |
199 | /* Assign CvGV(cv) = gv, handling weak references. |
200 | * See also S_anonymise_cv_maybe */ | |
201 | ||
202 | void | |
203 | Perl_cvgv_set(pTHX_ CV* cv, GV* gv) | |
204 | { | |
205 | GV * const oldgv = CvGV(cv); | |
206 | PERL_ARGS_ASSERT_CVGV_SET; | |
207 | ||
208 | if (oldgv == gv) | |
209 | return; | |
210 | ||
211 | if (oldgv) { | |
cfc1e951 | 212 | if (CvCVGV_RC(cv)) { |
803f2748 | 213 | SvREFCNT_dec(oldgv); |
cfc1e951 DM |
214 | CvCVGV_RC_off(cv); |
215 | } | |
803f2748 | 216 | else { |
803f2748 DM |
217 | sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv)); |
218 | } | |
219 | } | |
220 | ||
b3f91e91 | 221 | SvANY(cv)->xcv_gv = gv; |
c794ca97 | 222 | assert(!CvCVGV_RC(cv)); |
803f2748 DM |
223 | |
224 | if (!gv) | |
225 | return; | |
226 | ||
c794ca97 DM |
227 | if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv)) |
228 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv)); | |
229 | else { | |
cfc1e951 | 230 | CvCVGV_RC_on(cv); |
803f2748 DM |
231 | SvREFCNT_inc_simple_void_NN(gv); |
232 | } | |
803f2748 DM |
233 | } |
234 | ||
c68d9564 Z |
235 | /* Assign CvSTASH(cv) = st, handling weak references. */ |
236 | ||
237 | void | |
238 | Perl_cvstash_set(pTHX_ CV *cv, HV *st) | |
239 | { | |
240 | HV *oldst = CvSTASH(cv); | |
241 | PERL_ARGS_ASSERT_CVSTASH_SET; | |
242 | if (oldst == st) | |
243 | return; | |
244 | if (oldst) | |
245 | sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv)); | |
246 | SvANY(cv)->xcv_stash = st; | |
247 | if (st) | |
248 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv)); | |
249 | } | |
803f2748 | 250 | |
e1104062 FC |
251 | /* |
252 | =for apidoc gv_init_pvn | |
253 | ||
254 | Converts a scalar into a typeglob. This is an incoercible typeglob; | |
255 | assigning a reference to it will assign to one of its slots, instead of | |
256 | overwriting it as happens with typeglobs created by SvSetSV. Converting | |
257 | any scalar that is SvOK() may produce unpredictable results and is reserved | |
258 | for perl's internal use. | |
259 | ||
260 | C<gv> is the scalar to be converted. | |
261 | ||
262 | C<stash> is the parent stash/package, if any. | |
263 | ||
264 | C<name> and C<len> give the name. C<flags> can be set to SVf_UTF8 for a | |
265 | UTF8 string, or the return value of SvUTF8(sv). The name must be unqualified; that is, it must not include the package name. If C<gv> is a | |
266 | stash element, it is the caller's responsibility to ensure that the name | |
267 | passed to this function matches the name of the element. If it does not | |
268 | match, perl's internal bookkeeping will get out of sync. | |
269 | ||
270 | C<multi>, when set to a true value, means to pretend that the GV has been | |
271 | seen before (i.e., suppress "Used once" warnings). | |
272 | ||
273 | =for apidoc gv_init | |
274 | ||
275 | The old form of gv_init_pvn(). It does not work with UTF8 strings, as it | |
276 | has no flags parameter. | |
277 | ||
278 | =for apidoc gv_init_pv | |
279 | ||
280 | Same as gv_init_pvn(), but takes a nul-terminated string for the name | |
281 | instead of separate char * and length parameters. | |
282 | ||
283 | =for apidoc gv_init_sv | |
284 | ||
285 | Same as gv_init_pvn(), but takes an SV * for the name instead of separate | |
286 | char * and length parameters. C<flags> is currently unused. | |
287 | ||
288 | =cut | |
289 | */ | |
290 | ||
463ee0b2 | 291 | void |
e6066781 BF |
292 | Perl_gv_init_sv(pTHX_ GV *gv, HV *stash, SV* namesv, int multi, U32 flags) |
293 | { | |
294 | char *namepv; | |
295 | STRLEN namelen; | |
296 | PERL_ARGS_ASSERT_GV_INIT_SV; | |
297 | namepv = SvPV(namesv, namelen); | |
298 | if (SvUTF8(namesv)) | |
299 | flags |= SVf_UTF8; | |
300 | gv_init_pvn(gv, stash, namepv, namelen, multi, flags); | |
301 | } | |
302 | ||
303 | void | |
304 | Perl_gv_init_pv(pTHX_ GV *gv, HV *stash, const char *name, int multi, U32 flags) | |
305 | { | |
306 | PERL_ARGS_ASSERT_GV_INIT_PV; | |
307 | gv_init_pvn(gv, stash, name, strlen(name), multi, flags); | |
308 | } | |
309 | ||
310 | void | |
311 | Perl_gv_init_pvn(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi, U32 flags) | |
463ee0b2 | 312 | { |
27da23d5 | 313 | dVAR; |
3b6733bf NC |
314 | const U32 old_type = SvTYPE(gv); |
315 | const bool doproto = old_type > SVt_NULL; | |
024963f8 | 316 | char * const proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
49a54bbe | 317 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
756cb477 | 318 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 319 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 | 320 | |
e6066781 | 321 | PERL_ARGS_ASSERT_GV_INIT_PVN; |
756cb477 NC |
322 | assert (!(proto && has_constant)); |
323 | ||
324 | if (has_constant) { | |
5c1f4d79 NC |
325 | /* The constant has to be a simple scalar type. */ |
326 | switch (SvTYPE(has_constant)) { | |
327 | case SVt_PVAV: | |
328 | case SVt_PVHV: | |
329 | case SVt_PVCV: | |
330 | case SVt_PVFM: | |
331 | case SVt_PVIO: | |
332 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
333 | sv_reftype(has_constant, 0)); | |
42d0e0b7 | 334 | default: NOOP; |
5c1f4d79 | 335 | } |
756cb477 NC |
336 | SvRV_set(gv, NULL); |
337 | SvROK_off(gv); | |
338 | } | |
463ee0b2 | 339 | |
3b6733bf NC |
340 | |
341 | if (old_type < SVt_PVGV) { | |
342 | if (old_type >= SVt_PV) | |
343 | SvCUR_set(gv, 0); | |
ad64d0ec | 344 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); |
3b6733bf | 345 | } |
55d729e4 GS |
346 | if (SvLEN(gv)) { |
347 | if (proto) { | |
f880fe2f | 348 | SvPV_set(gv, NULL); |
b162af07 | 349 | SvLEN_set(gv, 0); |
55d729e4 GS |
350 | SvPOK_off(gv); |
351 | } else | |
94010e71 | 352 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 353 | } |
2e5b91de NC |
354 | SvIOK_off(gv); |
355 | isGV_with_GP_on(gv); | |
12816592 | 356 | |
c43ae56f | 357 | GvGP_set(gv, Perl_newGP(aTHX_ gv)); |
e15faf7d NC |
358 | GvSTASH(gv) = stash; |
359 | if (stash) | |
ad64d0ec | 360 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
ae8cc45f | 361 | gv_name_set(gv, name, len, GV_ADD); |
23ad5bf5 | 362 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
a5f75d66 | 363 | GvMULTI_on(gv); |
55d729e4 | 364 | if (doproto) { /* Replicate part of newSUB here. */ |
e3d2b9e7 | 365 | CV *cv; |
55d729e4 | 366 | ENTER; |
756cb477 | 367 | if (has_constant) { |
e5c69c9b DM |
368 | char *name0 = NULL; |
369 | if (name[len]) | |
370 | /* newCONSTSUB doesn't take a len arg, so make sure we | |
371 | * give it a \0-terminated string */ | |
372 | name0 = savepvn(name,len); | |
373 | ||
756cb477 | 374 | /* newCONSTSUB takes ownership of the reference from us. */ |
e5c69c9b | 375 | cv = newCONSTSUB(stash, (name0 ? name0 : name), has_constant); |
75bd28cf FC |
376 | /* In case op.c:S_process_special_blocks stole it: */ |
377 | if (!GvCV(gv)) | |
c43ae56f | 378 | GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv)); |
439cdf38 | 379 | assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */ |
e5c69c9b DM |
380 | if (name0) |
381 | Safefree(name0); | |
1ccdb730 NC |
382 | /* If this reference was a copy of another, then the subroutine |
383 | must have been "imported", by a Perl space assignment to a GV | |
384 | from a reference to CV. */ | |
385 | if (exported_constant) | |
386 | GvIMPORTED_CV_on(gv); | |
756cb477 | 387 | } else { |
756cb477 | 388 | (void) start_subparse(0,0); /* Create empty CV in compcv. */ |
e3d2b9e7 | 389 | cv = PL_compcv; |
c43ae56f | 390 | GvCV_set(gv,cv); |
756cb477 | 391 | } |
55d729e4 GS |
392 | LEAVE; |
393 | ||
e1a479c5 | 394 | mro_method_changed_in(GvSTASH(gv)); /* sub Foo::bar($) { (shift) } sub ASDF::baz($); *ASDF::baz = \&Foo::bar */ |
b3f91e91 | 395 | CvGV_set(cv, gv); |
e3d2b9e7 | 396 | CvFILE_set_from_cop(cv, PL_curcop); |
c68d9564 | 397 | CvSTASH_set(cv, PL_curstash); |
55d729e4 | 398 | if (proto) { |
e3d2b9e7 | 399 | sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen, |
49a54bbe | 400 | SV_HAS_TRAILING_NUL); |
55d729e4 GS |
401 | } |
402 | } | |
463ee0b2 LW |
403 | } |
404 | ||
76e3520e | 405 | STATIC void |
e6066781 | 406 | S_gv_init_svtype(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 407 | { |
e6066781 | 408 | PERL_ARGS_ASSERT_GV_INIT_SVTYPE; |
7918f24d | 409 | |
a0d0e21e LW |
410 | switch (sv_type) { |
411 | case SVt_PVIO: | |
412 | (void)GvIOn(gv); | |
413 | break; | |
414 | case SVt_PVAV: | |
415 | (void)GvAVn(gv); | |
416 | break; | |
417 | case SVt_PVHV: | |
418 | (void)GvHVn(gv); | |
419 | break; | |
c69033f2 NC |
420 | #ifdef PERL_DONT_CREATE_GVSV |
421 | case SVt_NULL: | |
422 | case SVt_PVCV: | |
423 | case SVt_PVFM: | |
e654831b | 424 | case SVt_PVGV: |
c69033f2 NC |
425 | break; |
426 | default: | |
dbdce04c NC |
427 | if(GvSVn(gv)) { |
428 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
429 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
430 | its side effect */ | |
431 | } | |
c69033f2 | 432 | #endif |
a0d0e21e LW |
433 | } |
434 | } | |
435 | ||
0f8d4b5e FC |
436 | static void core_xsub(pTHX_ CV* cv); |
437 | ||
438 | static GV * | |
439 | S_maybe_add_coresub(pTHX_ HV * const stash, GV *gv, | |
440 | const char * const name, const STRLEN len, | |
441 | const char * const fullname, STRLEN const fullen) | |
442 | { | |
443 | const int code = keyword(name, len, 1); | |
444 | static const char file[] = __FILE__; | |
445 | CV *cv, *oldcompcv; | |
446 | int opnum = 0; | |
447 | SV *opnumsv; | |
448 | bool ampable = TRUE; /* &{}-able */ | |
449 | COP *oldcurcop; | |
450 | yy_parser *oldparser; | |
451 | I32 oldsavestack_ix; | |
452 | ||
453 | assert(gv || stash); | |
454 | assert(name); | |
455 | assert(stash || fullname); | |
456 | ||
457 | if (!fullname && !HvENAME(stash)) return NULL; /* pathological case | |
458 | that would require | |
459 | inlining newATTRSUB */ | |
460 | if (code >= 0) return NULL; /* not overridable */ | |
461 | switch (-code) { | |
462 | /* no support for \&CORE::infix; | |
463 | no support for funcs that take labels, as their parsing is | |
464 | weird */ | |
465 | case KEY_and: case KEY_cmp: case KEY_CORE: case KEY_dump: | |
466 | case KEY_eq: case KEY_ge: | |
467 | case KEY_gt: case KEY_le: case KEY_lt: case KEY_ne: | |
468 | case KEY_or: case KEY_x: case KEY_xor: | |
469 | return NULL; | |
470 | case KEY_chdir: | |
471 | case KEY_chomp: case KEY_chop: | |
472 | case KEY_each: case KEY_eof: case KEY_exec: | |
473 | case KEY_keys: | |
474 | case KEY_lstat: | |
475 | case KEY_pop: | |
476 | case KEY_push: | |
477 | case KEY_shift: | |
478 | case KEY_splice: | |
479 | case KEY_stat: | |
480 | case KEY_system: | |
481 | case KEY_truncate: case KEY_unlink: | |
482 | case KEY_unshift: | |
483 | case KEY_values: | |
484 | ampable = FALSE; | |
485 | } | |
486 | if (!gv) { | |
487 | gv = (GV *)newSV(0); | |
488 | gv_init(gv, stash, name, len, TRUE); | |
489 | } | |
490 | if (ampable) { | |
491 | ENTER; | |
492 | oldcurcop = PL_curcop; | |
493 | oldparser = PL_parser; | |
494 | lex_start(NULL, NULL, 0); | |
495 | oldcompcv = PL_compcv; | |
496 | PL_compcv = NULL; /* Prevent start_subparse from setting | |
497 | CvOUTSIDE. */ | |
498 | oldsavestack_ix = start_subparse(FALSE,0); | |
499 | cv = PL_compcv; | |
500 | } | |
501 | else { | |
502 | /* Avoid calling newXS, as it calls us, and things start to | |
503 | get hairy. */ | |
504 | cv = MUTABLE_CV(newSV_type(SVt_PVCV)); | |
505 | GvCV_set(gv,cv); | |
506 | GvCVGEN(gv) = 0; | |
507 | mro_method_changed_in(GvSTASH(gv)); | |
508 | CvISXSUB_on(cv); | |
509 | CvXSUB(cv) = core_xsub; | |
510 | } | |
511 | CvGV_set(cv, gv); /* This stops new ATTRSUB from setting CvFILE | |
512 | from PL_curcop. */ | |
513 | (void)gv_fetchfile(file); | |
514 | CvFILE(cv) = (char *)file; | |
515 | /* XXX This is inefficient, as doing things this order causes | |
516 | a prototype check in newATTRSUB. But we have to do | |
517 | it this order as we need an op number before calling | |
518 | new ATTRSUB. */ | |
519 | (void)core_prototype((SV *)cv, name, code, &opnum); | |
73c02f15 FC |
520 | if (stash && (fullname || !fullen)) |
521 | (void)hv_store(stash,name,len,(SV *)gv,0); | |
0f8d4b5e FC |
522 | if (ampable) { |
523 | SV *tmpstr; | |
524 | CvLVALUE_on(cv); | |
525 | if (!fullname) { | |
526 | tmpstr = newSVhek(HvENAME_HEK(stash)); | |
527 | sv_catpvs(tmpstr, "::"); | |
528 | sv_catpvn(tmpstr,name,len); | |
529 | } | |
530 | else tmpstr = newSVpvn_share(fullname,fullen,0); | |
531 | newATTRSUB(oldsavestack_ix, | |
532 | newSVOP(OP_CONST, 0, tmpstr), | |
533 | NULL,NULL, | |
534 | coresub_op( | |
535 | opnum | |
536 | ? newSVuv((UV)opnum) | |
537 | : newSVpvn(name,len), | |
538 | code, opnum | |
539 | ) | |
540 | ); | |
541 | assert(GvCV(gv) == cv); | |
542 | if (opnum != OP_VEC && opnum != OP_SUBSTR) | |
543 | CvLVALUE_off(cv); /* Now *that* was a neat trick. */ | |
544 | LEAVE; | |
545 | PL_parser = oldparser; | |
546 | PL_curcop = oldcurcop; | |
547 | PL_compcv = oldcompcv; | |
548 | } | |
549 | opnumsv = opnum ? newSVuv((UV)opnum) : (SV *)NULL; | |
550 | cv_set_call_checker( | |
551 | cv, Perl_ck_entersub_args_core, opnumsv ? opnumsv : (SV *)cv | |
552 | ); | |
553 | SvREFCNT_dec(opnumsv); | |
554 | return gv; | |
555 | } | |
556 | ||
954c1994 | 557 | /* |
6c53d59b FC |
558 | =for apidoc gv_fetchmeth |
559 | ||
560 | Like L</gv_fetchmeth_pvn>, but lacks a flags parameter. | |
561 | ||
e6919483 BF |
562 | =for apidoc gv_fetchmeth_sv |
563 | ||
564 | Exactly like L</gv_fetchmeth_pvn>, but takes the name string in the form | |
565 | of an SV instead of a string/length pair. | |
566 | ||
567 | =cut | |
568 | */ | |
569 | ||
570 | GV * | |
571 | Perl_gv_fetchmeth_sv(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
572 | { | |
573 | char *namepv; | |
574 | STRLEN namelen; | |
575 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV; | |
576 | namepv = SvPV(namesv, namelen); | |
577 | if (SvUTF8(namesv)) | |
578 | flags |= SVf_UTF8; | |
579 | return gv_fetchmeth_pvn(stash, namepv, namelen, level, flags); | |
580 | } | |
581 | ||
582 | /* | |
583 | =for apidoc gv_fetchmeth_pv | |
584 | ||
585 | Exactly like L</gv_fetchmeth_pvn>, but takes a nul-terminated string | |
586 | instead of a string/length pair. | |
587 | ||
588 | =cut | |
589 | */ | |
590 | ||
591 | GV * | |
592 | Perl_gv_fetchmeth_pv(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
593 | { | |
594 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV; | |
595 | return gv_fetchmeth_pvn(stash, name, strlen(name), level, flags); | |
596 | } | |
597 | ||
598 | /* | |
599 | =for apidoc gv_fetchmeth_pvn | |
954c1994 GS |
600 | |
601 | Returns the glob with the given C<name> and a defined subroutine or | |
602 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
07766739 | 603 | accessible via @ISA and UNIVERSAL::. |
954c1994 GS |
604 | |
605 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
606 | side-effect creates a glob with the given C<name> in the given C<stash> | |
607 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 608 | up caching info for this glob. |
954c1994 | 609 | |
e6919483 BF |
610 | Currently, the only significant value for C<flags> is SVf_UTF8. |
611 | ||
954c1994 GS |
612 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
613 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not | |
4929bf7b | 614 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 615 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 616 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
617 | |
618 | =cut | |
619 | */ | |
620 | ||
e1a479c5 BB |
621 | /* NOTE: No support for tied ISA */ |
622 | ||
79072805 | 623 | GV * |
e6919483 | 624 | Perl_gv_fetchmeth_pvn(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) |
79072805 | 625 | { |
97aff369 | 626 | dVAR; |
463ee0b2 | 627 | GV** gvp; |
e1a479c5 BB |
628 | AV* linear_av; |
629 | SV** linear_svp; | |
630 | SV* linear_sv; | |
631 | HV* cstash; | |
632 | GV* candidate = NULL; | |
633 | CV* cand_cv = NULL; | |
e1a479c5 | 634 | GV* topgv = NULL; |
bfcb3514 | 635 | const char *hvname; |
e1a479c5 BB |
636 | I32 create = (level >= 0) ? 1 : 0; |
637 | I32 items; | |
638 | STRLEN packlen; | |
639 | U32 topgen_cmp; | |
a0d0e21e | 640 | |
e6919483 | 641 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN; |
7918f24d | 642 | |
af09ea45 IK |
643 | /* UNIVERSAL methods should be callable without a stash */ |
644 | if (!stash) { | |
e1a479c5 | 645 | create = 0; /* probably appropriate */ |
da51bb9b | 646 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
647 | return 0; |
648 | } | |
649 | ||
e1a479c5 BB |
650 | assert(stash); |
651 | ||
bfcb3514 NC |
652 | hvname = HvNAME_get(stash); |
653 | if (!hvname) | |
e1a479c5 | 654 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 655 | |
e1a479c5 BB |
656 | assert(hvname); |
657 | assert(name); | |
463ee0b2 | 658 | |
bfcb3514 | 659 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,hvname) ); |
44a8e56a | 660 | |
dd69841b | 661 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 BB |
662 | |
663 | /* check locally for a real method or a cache entry */ | |
664 | gvp = (GV**)hv_fetch(stash, name, len, create); | |
665 | if(gvp) { | |
666 | topgv = *gvp; | |
0f8d4b5e | 667 | have_gv: |
e1a479c5 BB |
668 | assert(topgv); |
669 | if (SvTYPE(topgv) != SVt_PVGV) | |
670 | gv_init(topgv, stash, name, len, TRUE); | |
671 | if ((cand_cv = GvCV(topgv))) { | |
672 | /* If genuine method or valid cache entry, use it */ | |
673 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
674 | return topgv; | |
675 | } | |
676 | else { | |
677 | /* stale cache entry, junk it and move on */ | |
678 | SvREFCNT_dec(cand_cv); | |
c43ae56f DM |
679 | GvCV_set(topgv, NULL); |
680 | cand_cv = NULL; | |
e1a479c5 BB |
681 | GvCVGEN(topgv) = 0; |
682 | } | |
683 | } | |
684 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
685 | /* cache indicates no such method definitively */ | |
686 | return 0; | |
687 | } | |
0f8d4b5e FC |
688 | else if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4 |
689 | && strnEQ(hvname, "CORE", 4) | |
73c02f15 | 690 | && S_maybe_add_coresub(aTHX_ stash,topgv,name,len,0,1)) |
0f8d4b5e | 691 | goto have_gv; |
463ee0b2 | 692 | } |
79072805 | 693 | |
e1a479c5 BB |
694 | packlen = HvNAMELEN_get(stash); |
695 | if (packlen >= 7 && strEQ(hvname + packlen - 7, "::SUPER")) { | |
696 | HV* basestash; | |
697 | packlen -= 7; | |
698 | basestash = gv_stashpvn(hvname, packlen, GV_ADD); | |
699 | linear_av = mro_get_linear_isa(basestash); | |
9607fc9c | 700 | } |
e1a479c5 BB |
701 | else { |
702 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ | |
79072805 | 703 | } |
a0d0e21e | 704 | |
e1a479c5 BB |
705 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
706 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
707 | while (items--) { | |
708 | linear_sv = *linear_svp++; | |
709 | assert(linear_sv); | |
710 | cstash = gv_stashsv(linear_sv, 0); | |
711 | ||
dd69841b | 712 | if (!cstash) { |
a2a5de95 NC |
713 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), "Can't locate package %"SVf" for @%s::ISA", |
714 | SVfARG(linear_sv), hvname); | |
e1a479c5 BB |
715 | continue; |
716 | } | |
9607fc9c | 717 | |
e1a479c5 BB |
718 | assert(cstash); |
719 | ||
720 | gvp = (GV**)hv_fetch(cstash, name, len, 0); | |
0f8d4b5e FC |
721 | if (!gvp) { |
722 | if (len > 1 && HvNAMELEN_get(cstash) == 4) { | |
723 | const char *hvname = HvNAME(cstash); assert(hvname); | |
724 | if (strnEQ(hvname, "CORE", 4) | |
725 | && (candidate = | |
726 | S_maybe_add_coresub(aTHX_ cstash,NULL,name,len,0,0) | |
727 | )) | |
728 | goto have_candidate; | |
729 | } | |
730 | continue; | |
731 | } | |
732 | else candidate = *gvp; | |
733 | have_candidate: | |
e1a479c5 BB |
734 | assert(candidate); |
735 | if (SvTYPE(candidate) != SVt_PVGV) gv_init(candidate, cstash, name, len, TRUE); | |
736 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { | |
737 | /* | |
738 | * Found real method, cache method in topgv if: | |
739 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
740 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
741 | */ | |
742 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
743 | CV *old_cv = GvCV(topgv); |
744 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 745 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 746 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
747 | GvCVGEN(topgv) = topgen_cmp; |
748 | } | |
749 | return candidate; | |
750 | } | |
751 | } | |
9607fc9c | 752 | |
e1a479c5 BB |
753 | /* Check UNIVERSAL without caching */ |
754 | if(level == 0 || level == -1) { | |
e6919483 | 755 | candidate = gv_fetchmeth_pvn(NULL, name, len, 1, flags); |
e1a479c5 BB |
756 | if(candidate) { |
757 | cand_cv = GvCV(candidate); | |
758 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
759 | CV *old_cv = GvCV(topgv); |
760 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 761 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 762 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
763 | GvCVGEN(topgv) = topgen_cmp; |
764 | } | |
765 | return candidate; | |
766 | } | |
767 | } | |
768 | ||
769 | if (topgv && GvREFCNT(topgv) == 1) { | |
770 | /* cache the fact that the method is not defined */ | |
771 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
772 | } |
773 | ||
79072805 LW |
774 | return 0; |
775 | } | |
776 | ||
954c1994 | 777 | /* |
611c1e95 IZ |
778 | =for apidoc gv_fetchmeth_autoload |
779 | ||
780 | Same as gv_fetchmeth(), but looks for autoloaded subroutines too. | |
781 | Returns a glob for the subroutine. | |
782 | ||
783 | For an autoloaded subroutine without a GV, will create a GV even | |
784 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() | |
785 | of the result may be zero. | |
786 | ||
787 | =cut | |
788 | */ | |
789 | ||
790 | GV * | |
791 | Perl_gv_fetchmeth_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) | |
792 | { | |
e6919483 | 793 | GV *gv = gv_fetchmeth_pvn(stash, name, len, level, 0); |
611c1e95 | 794 | |
7918f24d NC |
795 | PERL_ARGS_ASSERT_GV_FETCHMETH_AUTOLOAD; |
796 | ||
611c1e95 | 797 | if (!gv) { |
611c1e95 IZ |
798 | CV *cv; |
799 | GV **gvp; | |
800 | ||
801 | if (!stash) | |
6136c704 | 802 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b | 803 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 | 804 | return NULL; |
e6919483 | 805 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, 0))) |
6136c704 | 806 | return NULL; |
611c1e95 IZ |
807 | cv = GvCV(gv); |
808 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 809 | return NULL; |
611c1e95 IZ |
810 | /* Have an autoload */ |
811 | if (level < 0) /* Cannot do without a stub */ | |
e6919483 | 812 | gv_fetchmeth_pvn(stash, name, len, 0, 0); |
611c1e95 IZ |
813 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
814 | if (!gvp) | |
6136c704 | 815 | return NULL; |
611c1e95 IZ |
816 | return *gvp; |
817 | } | |
818 | return gv; | |
819 | } | |
820 | ||
821 | /* | |
954c1994 GS |
822 | =for apidoc gv_fetchmethod_autoload |
823 | ||
824 | Returns the glob which contains the subroutine to call to invoke the method | |
825 | on the C<stash>. In fact in the presence of autoloading this may be the | |
826 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is | |
b267980d | 827 | already setup. |
954c1994 GS |
828 | |
829 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
830 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 831 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 832 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 833 | with a non-zero C<autoload> parameter. |
954c1994 GS |
834 | |
835 | These functions grant C<"SUPER"> token as a prefix of the method name. Note | |
836 | that if you want to keep the returned glob for a long time, you need to | |
837 | check for it being "AUTOLOAD", since at the later time the call may load a | |
838 | different subroutine due to $AUTOLOAD changing its value. Use the glob | |
b267980d | 839 | created via a side effect to do this. |
954c1994 GS |
840 | |
841 | These functions have the same side-effects and as C<gv_fetchmeth> with | |
842 | C<level==0>. C<name> should be writable if contains C<':'> or C<' | |
843 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to | |
b267980d | 844 | C<call_sv> apply equally to these functions. |
954c1994 GS |
845 | |
846 | =cut | |
847 | */ | |
848 | ||
7d3b1f61 BB |
849 | STATIC HV* |
850 | S_gv_get_super_pkg(pTHX_ const char* name, I32 namelen) | |
851 | { | |
852 | AV* superisa; | |
853 | GV** gvp; | |
854 | GV* gv; | |
855 | HV* stash; | |
856 | ||
7918f24d NC |
857 | PERL_ARGS_ASSERT_GV_GET_SUPER_PKG; |
858 | ||
7d3b1f61 BB |
859 | stash = gv_stashpvn(name, namelen, 0); |
860 | if(stash) return stash; | |
861 | ||
862 | /* If we must create it, give it an @ISA array containing | |
863 | the real package this SUPER is for, so that it's tied | |
864 | into the cache invalidation code correctly */ | |
865 | stash = gv_stashpvn(name, namelen, GV_ADD); | |
866 | gvp = (GV**)hv_fetchs(stash, "ISA", TRUE); | |
867 | gv = *gvp; | |
868 | gv_init(gv, stash, "ISA", 3, TRUE); | |
869 | superisa = GvAVn(gv); | |
870 | GvMULTI_on(gv); | |
ad64d0ec | 871 | sv_magic(MUTABLE_SV(superisa), MUTABLE_SV(gv), PERL_MAGIC_isa, NULL, 0); |
8e3a4a30 | 872 | #ifdef USE_ITHREADS |
7d3b1f61 | 873 | av_push(superisa, newSVpv(CopSTASHPV(PL_curcop), 0)); |
8e3a4a30 NC |
874 | #else |
875 | av_push(superisa, newSVhek(CopSTASH(PL_curcop) | |
876 | ? HvNAME_HEK(CopSTASH(PL_curcop)) : NULL)); | |
877 | #endif | |
7d3b1f61 BB |
878 | |
879 | return stash; | |
880 | } | |
881 | ||
dc848c6f | 882 | GV * |
864dbfa3 | 883 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 884 | { |
547bb267 NC |
885 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
886 | ||
256d1bb2 NC |
887 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
888 | } | |
889 | ||
890 | /* Don't merge this yet, as it's likely to get a len parameter, and possibly | |
891 | even a U32 hash */ | |
892 | GV * | |
893 | Perl_gv_fetchmethod_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
894 | { | |
97aff369 | 895 | dVAR; |
08105a92 | 896 | register const char *nend; |
c445ea15 | 897 | const char *nsplit = NULL; |
a0d0e21e | 898 | GV* gv; |
0dae17bd | 899 | HV* ostash = stash; |
c94593d0 | 900 | const char * const origname = name; |
ad64d0ec | 901 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 NC |
902 | const U32 autoload = flags & GV_AUTOLOAD; |
903 | const U32 do_croak = flags & GV_CROAK; | |
0dae17bd | 904 | |
547bb267 | 905 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_FLAGS; |
7918f24d | 906 | |
eff494dd | 907 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 | 908 | stash = NULL; |
c9bf4021 NC |
909 | else { |
910 | /* The only way stash can become NULL later on is if nsplit is set, | |
911 | which in turn means that there is no need for a SVt_PVHV case | |
912 | the error reporting code. */ | |
913 | } | |
b267980d | 914 | |
463ee0b2 | 915 | for (nend = name; *nend; nend++) { |
c94593d0 | 916 | if (*nend == '\'') { |
a0d0e21e | 917 | nsplit = nend; |
c94593d0 NC |
918 | name = nend + 1; |
919 | } | |
920 | else if (*nend == ':' && *(nend + 1) == ':') { | |
921 | nsplit = nend++; | |
922 | name = nend + 1; | |
923 | } | |
a0d0e21e LW |
924 | } |
925 | if (nsplit) { | |
7edbdc6b | 926 | if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) { |
9607fc9c | 927 | /* ->SUPER::method should really be looked up in original stash */ |
b37c2d43 | 928 | SV * const tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
1d7c1841 | 929 | CopSTASHPV(PL_curcop))); |
af09ea45 | 930 | /* __PACKAGE__::SUPER stash should be autovivified */ |
7d3b1f61 | 931 | stash = gv_get_super_pkg(SvPVX_const(tmpstr), SvCUR(tmpstr)); |
cea2e8a9 | 932 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
bfcb3514 | 933 | origname, HvNAME_get(stash), name) ); |
4633a7c4 | 934 | } |
e189a56d | 935 | else { |
af09ea45 | 936 | /* don't autovifify if ->NoSuchStash::method */ |
da51bb9b | 937 | stash = gv_stashpvn(origname, nsplit - origname, 0); |
e189a56d IK |
938 | |
939 | /* however, explicit calls to Pkg::SUPER::method may | |
940 | happen, and may require autovivification to work */ | |
941 | if (!stash && (nsplit - origname) >= 7 && | |
942 | strnEQ(nsplit - 7, "::SUPER", 7) && | |
da51bb9b | 943 | gv_stashpvn(origname, nsplit - origname - 7, 0)) |
7d3b1f61 | 944 | stash = gv_get_super_pkg(origname, nsplit - origname); |
e189a56d | 945 | } |
0dae17bd | 946 | ostash = stash; |
4633a7c4 LW |
947 | } |
948 | ||
e6919483 | 949 | gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, 0); |
a0d0e21e | 950 | if (!gv) { |
2f6e0fe7 | 951 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
159b6efe | 952 | gv = MUTABLE_GV(&PL_sv_yes); |
dc848c6f | 953 | else if (autoload) |
0dae17bd | 954 | gv = gv_autoload4(ostash, name, nend - name, TRUE); |
256d1bb2 NC |
955 | if (!gv && do_croak) { |
956 | /* Right now this is exclusively for the benefit of S_method_common | |
957 | in pp_hot.c */ | |
958 | if (stash) { | |
15e6cdd9 DG |
959 | /* If we can't find an IO::File method, it might be a call on |
960 | * a filehandle. If IO:File has not been loaded, try to | |
961 | * require it first instead of croaking */ | |
962 | const char *stash_name = HvNAME_get(stash); | |
31b05a0f FR |
963 | if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File") |
964 | && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL, | |
965 | STR_WITH_LEN("IO/File.pm"), 0, | |
966 | HV_FETCH_ISEXISTS, NULL, 0) | |
15e6cdd9 | 967 | ) { |
31b05a0f | 968 | require_pv("IO/File.pm"); |
e6919483 | 969 | gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, 0); |
15e6cdd9 DG |
970 | if (gv) |
971 | return gv; | |
972 | } | |
256d1bb2 NC |
973 | Perl_croak(aTHX_ |
974 | "Can't locate object method \"%s\" via package \"%.*s\"", | |
c49b597d | 975 | name, (int)HvNAMELEN_get(stash), HvNAME_get(stash)); |
256d1bb2 NC |
976 | } |
977 | else { | |
978 | STRLEN packlen; | |
979 | const char *packname; | |
980 | ||
256d1bb2 NC |
981 | if (nsplit) { |
982 | packlen = nsplit - origname; | |
983 | packname = origname; | |
256d1bb2 NC |
984 | } else { |
985 | packname = SvPV_const(error_report, packlen); | |
986 | } | |
987 | ||
988 | Perl_croak(aTHX_ | |
989 | "Can't locate object method \"%s\" via package \"%.*s\"" | |
990 | " (perhaps you forgot to load \"%.*s\"?)", | |
991 | name, (int)packlen, packname, (int)packlen, packname); | |
992 | } | |
993 | } | |
463ee0b2 | 994 | } |
dc848c6f | 995 | else if (autoload) { |
9d4ba2ae | 996 | CV* const cv = GvCV(gv); |
09280a33 CS |
997 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
998 | GV* stubgv; | |
999 | GV* autogv; | |
1000 | ||
1001 | if (CvANON(cv)) | |
1002 | stubgv = gv; | |
1003 | else { | |
1004 | stubgv = CvGV(cv); | |
1005 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
1006 | stubgv = gv; | |
1007 | } | |
1008 | autogv = gv_autoload4(GvSTASH(stubgv), | |
1009 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 1010 | if (autogv) |
1011 | gv = autogv; | |
1012 | } | |
1013 | } | |
44a8e56a | 1014 | |
1015 | return gv; | |
1016 | } | |
1017 | ||
1018 | GV* | |
864dbfa3 | 1019 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
44a8e56a | 1020 | { |
27da23d5 | 1021 | dVAR; |
44a8e56a | 1022 | GV* gv; |
1023 | CV* cv; | |
1024 | HV* varstash; | |
1025 | GV* vargv; | |
1026 | SV* varsv; | |
e1ec3a88 | 1027 | const char *packname = ""; |
eae70eaa | 1028 | STRLEN packname_len = 0; |
44a8e56a | 1029 | |
7918f24d NC |
1030 | PERL_ARGS_ASSERT_GV_AUTOLOAD4; |
1031 | ||
7edbdc6b | 1032 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c | 1033 | return NULL; |
0dae17bd GS |
1034 | if (stash) { |
1035 | if (SvTYPE(stash) < SVt_PVHV) { | |
ad64d0ec | 1036 | packname = SvPV_const(MUTABLE_SV(stash), packname_len); |
5c284bb0 | 1037 | stash = NULL; |
0dae17bd GS |
1038 | } |
1039 | else { | |
bfcb3514 | 1040 | packname = HvNAME_get(stash); |
7423f6db | 1041 | packname_len = HvNAMELEN_get(stash); |
0dae17bd GS |
1042 | } |
1043 | } | |
e6919483 | 1044 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, 0))) |
a0714e2c | 1045 | return NULL; |
dc848c6f | 1046 | cv = GvCV(gv); |
1047 | ||
adb5a9ae | 1048 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 1049 | return NULL; |
ed850460 | 1050 | |
dc848c6f | 1051 | /* |
1052 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
1053 | */ | |
041457d9 | 1054 | if (!method && (GvCVGEN(gv) || GvSTASH(gv) != stash) |
041457d9 | 1055 | ) |
d1d15184 NC |
1056 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
1057 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", | |
1058 | packname, (int)len, name); | |
44a8e56a | 1059 | |
aed2304a | 1060 | if (CvISXSUB(cv)) { |
adb5a9ae DM |
1061 | /* rather than lookup/init $AUTOLOAD here |
1062 | * only to have the XSUB do another lookup for $AUTOLOAD | |
1063 | * and split that value on the last '::', | |
1064 | * pass along the same data via some unused fields in the CV | |
1065 | */ | |
c68d9564 | 1066 | CvSTASH_set(cv, stash); |
f880fe2f | 1067 | SvPV_set(cv, (char *)name); /* cast to lose constness warning */ |
b162af07 | 1068 | SvCUR_set(cv, len); |
adb5a9ae DM |
1069 | return gv; |
1070 | } | |
adb5a9ae | 1071 | |
44a8e56a | 1072 | /* |
1073 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
1074 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
1075 | * use that, but for lack of anything better we will use the sub's | |
1076 | * original package to look up $AUTOLOAD. | |
1077 | */ | |
1078 | varstash = GvSTASH(CvGV(cv)); | |
5c7983e5 | 1079 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
1080 | ENTER; |
1081 | ||
c69033f2 | 1082 | if (!isGV(vargv)) { |
5c7983e5 | 1083 | gv_init(vargv, varstash, S_autoload, S_autolen, FALSE); |
c69033f2 | 1084 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 1085 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
1086 | #endif |
1087 | } | |
3d35f11b | 1088 | LEAVE; |
e203899d | 1089 | varsv = GvSVn(vargv); |
7423f6db | 1090 | sv_setpvn(varsv, packname, packname_len); |
396482e1 | 1091 | sv_catpvs(varsv, "::"); |
d40bf27b NC |
1092 | /* Ensure SvSETMAGIC() is called if necessary. In particular, to clear |
1093 | tainting if $FOO::AUTOLOAD was previously tainted, but is not now. */ | |
1094 | sv_catpvn_mg(varsv, name, len); | |
a0d0e21e LW |
1095 | return gv; |
1096 | } | |
1097 | ||
44a2ac75 YO |
1098 | |
1099 | /* require_tie_mod() internal routine for requiring a module | |
486ec47a | 1100 | * that implements the logic of automatic ties like %! and %- |
44a2ac75 YO |
1101 | * |
1102 | * The "gv" parameter should be the glob. | |
45cbc99a RGS |
1103 | * "varpv" holds the name of the var, used for error messages. |
1104 | * "namesv" holds the module name. Its refcount will be decremented. | |
44a2ac75 | 1105 | * "methpv" holds the method name to test for to check that things |
45cbc99a RGS |
1106 | * are working reasonably close to as expected. |
1107 | * "flags": if flag & 1 then save the scalar before loading. | |
44a2ac75 YO |
1108 | * For the protection of $! to work (it is set by this routine) |
1109 | * the sv slot must already be magicalized. | |
d2c93421 | 1110 | */ |
44a2ac75 YO |
1111 | STATIC HV* |
1112 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) | |
d2c93421 | 1113 | { |
27da23d5 | 1114 | dVAR; |
da51bb9b | 1115 | HV* stash = gv_stashsv(namesv, 0); |
45cbc99a | 1116 | |
7918f24d NC |
1117 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
1118 | ||
44a2ac75 | 1119 | if (!stash || !(gv_fetchmethod(stash, methpv))) { |
45cbc99a RGS |
1120 | SV *module = newSVsv(namesv); |
1121 | char varname = *varpv; /* varpv might be clobbered by load_module, | |
1122 | so save it. For the moment it's always | |
1123 | a single char. */ | |
d2c93421 | 1124 | dSP; |
d2c93421 | 1125 | ENTER; |
44a2ac75 | 1126 | if ( flags & 1 ) |
45cbc99a | 1127 | save_scalar(gv); |
cac54379 | 1128 | PUSHSTACKi(PERLSI_MAGIC); |
45cbc99a | 1129 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
cac54379 | 1130 | POPSTACK; |
d2c93421 RH |
1131 | LEAVE; |
1132 | SPAGAIN; | |
da51bb9b | 1133 | stash = gv_stashsv(namesv, 0); |
44a2ac75 | 1134 | if (!stash) |
45cbc99a RGS |
1135 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" is not available", |
1136 | varname, SVfARG(namesv)); | |
1137 | else if (!gv_fetchmethod(stash, methpv)) | |
1138 | Perl_croak(aTHX_ "panic: Can't use %%%c because %"SVf" does not support method %s", | |
1139 | varname, SVfARG(namesv), methpv); | |
d2c93421 | 1140 | } |
45cbc99a | 1141 | SvREFCNT_dec(namesv); |
44a2ac75 | 1142 | return stash; |
d2c93421 RH |
1143 | } |
1144 | ||
954c1994 GS |
1145 | /* |
1146 | =for apidoc gv_stashpv | |
1147 | ||
da51bb9b | 1148 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 1149 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
1150 | |
1151 | =cut | |
1152 | */ | |
1153 | ||
a0d0e21e | 1154 | HV* |
864dbfa3 | 1155 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 1156 | { |
7918f24d | 1157 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 1158 | return gv_stashpvn(name, strlen(name), create); |
1159 | } | |
1160 | ||
bc96cb06 SH |
1161 | /* |
1162 | =for apidoc gv_stashpvn | |
1163 | ||
da51bb9b NC |
1164 | Returns a pointer to the stash for a specified package. The C<namelen> |
1165 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
1166 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
1167 | created if it does not already exist. If the package does not exist and | |
1168 | C<flags> is 0 (or any other setting that does not create packages) then NULL | |
1169 | is returned. | |
1170 | ||
bc96cb06 SH |
1171 | |
1172 | =cut | |
1173 | */ | |
1174 | ||
dc437b57 | 1175 | HV* |
da51bb9b | 1176 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 1177 | { |
0cea0058 | 1178 | char smallbuf[128]; |
46fc3d4c | 1179 | char *tmpbuf; |
a0d0e21e LW |
1180 | HV *stash; |
1181 | GV *tmpgv; | |
add0ecde | 1182 | U32 tmplen = namelen + 2; |
dc437b57 | 1183 | |
7918f24d NC |
1184 | PERL_ARGS_ASSERT_GV_STASHPVN; |
1185 | ||
add0ecde | 1186 | if (tmplen <= sizeof smallbuf) |
46fc3d4c | 1187 | tmpbuf = smallbuf; |
1188 | else | |
add0ecde VP |
1189 | Newx(tmpbuf, tmplen, char); |
1190 | Copy(name, tmpbuf, namelen, char); | |
1191 | tmpbuf[namelen] = ':'; | |
1192 | tmpbuf[namelen+1] = ':'; | |
1193 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); | |
46fc3d4c | 1194 | if (tmpbuf != smallbuf) |
1195 | Safefree(tmpbuf); | |
a0d0e21e | 1196 | if (!tmpgv) |
da51bb9b | 1197 | return NULL; |
a0d0e21e | 1198 | stash = GvHV(tmpgv); |
1f656fcf | 1199 | if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL; |
9efb5c72 | 1200 | assert(stash); |
1f656fcf | 1201 | if (!HvNAME_get(stash)) { |
1a063a89 | 1202 | hv_name_set(stash, name, namelen, 0); |
1f656fcf FC |
1203 | |
1204 | /* FIXME: This is a repeat of logic in gv_fetchpvn_flags */ | |
1205 | /* If the containing stash has multiple effective | |
1206 | names, see that this one gets them, too. */ | |
1207 | if (HvAUX(GvSTASH(tmpgv))->xhv_name_count) | |
1208 | mro_package_moved(stash, NULL, tmpgv, 1); | |
1209 | } | |
a0d0e21e | 1210 | return stash; |
463ee0b2 LW |
1211 | } |
1212 | ||
954c1994 GS |
1213 | /* |
1214 | =for apidoc gv_stashsv | |
1215 | ||
da51bb9b | 1216 | Returns a pointer to the stash for a specified package. See C<gv_stashpvn>. |
954c1994 GS |
1217 | |
1218 | =cut | |
1219 | */ | |
1220 | ||
a0d0e21e | 1221 | HV* |
da51bb9b | 1222 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 1223 | { |
dc437b57 | 1224 | STRLEN len; |
9d4ba2ae | 1225 | const char * const ptr = SvPV_const(sv,len); |
7918f24d NC |
1226 | |
1227 | PERL_ARGS_ASSERT_GV_STASHSV; | |
1228 | ||
da51bb9b | 1229 | return gv_stashpvn(ptr, len, flags); |
a0d0e21e LW |
1230 | } |
1231 | ||
1232 | ||
463ee0b2 | 1233 | GV * |
fe9845cc | 1234 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) { |
7918f24d | 1235 | PERL_ARGS_ASSERT_GV_FETCHPV; |
b7787f18 | 1236 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
1237 | } |
1238 | ||
1239 | GV * | |
fe9845cc | 1240 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 1241 | STRLEN len; |
77cb3b01 FC |
1242 | const char * const nambeg = |
1243 | SvPV_flags_const(name, len, flags & GV_NO_SVGMAGIC ? 0 : SV_GMAGIC); | |
7918f24d | 1244 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
1245 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
1246 | } | |
1247 | ||
ad7cce9f | 1248 | STATIC void |
290a1700 | 1249 | S_gv_magicalize_isa(pTHX_ GV *gv) |
ad7cce9f FR |
1250 | { |
1251 | AV* av; | |
1252 | ||
1253 | PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA; | |
1254 | ||
1255 | av = GvAVn(gv); | |
1256 | GvMULTI_on(gv); | |
1257 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, | |
1258 | NULL, 0); | |
ad7cce9f FR |
1259 | } |
1260 | ||
1261 | STATIC void | |
26469672 | 1262 | S_gv_magicalize_overload(pTHX_ GV *gv) |
ad7cce9f FR |
1263 | { |
1264 | HV* hv; | |
1265 | ||
1266 | PERL_ARGS_ASSERT_GV_MAGICALIZE_OVERLOAD; | |
1267 | ||
1268 | hv = GvHVn(gv); | |
1269 | GvMULTI_on(gv); | |
1270 | hv_magic(hv, NULL, PERL_MAGIC_overload); | |
1271 | } | |
1272 | ||
7a5fd60d NC |
1273 | GV * |
1274 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
fe9845cc | 1275 | const svtype sv_type) |
79072805 | 1276 | { |
97aff369 | 1277 | dVAR; |
08105a92 | 1278 | register const char *name = nambeg; |
c445ea15 | 1279 | register GV *gv = NULL; |
79072805 | 1280 | GV**gvp; |
79072805 | 1281 | I32 len; |
b3d904f3 | 1282 | register const char *name_cursor; |
c445ea15 | 1283 | HV *stash = NULL; |
add2581e | 1284 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); |
e26df76a | 1285 | const I32 no_expand = flags & GV_NOEXPAND; |
780a5241 | 1286 | const I32 add = flags & ~GV_NOADD_MASK; |
9da346da | 1287 | bool addmg = !!(flags & GV_ADDMG); |
b3d904f3 NC |
1288 | const char *const name_end = nambeg + full_len; |
1289 | const char *const name_em1 = name_end - 1; | |
5e0caaeb | 1290 | U32 faking_it; |
79072805 | 1291 | |
7918f24d NC |
1292 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; |
1293 | ||
fafc274c NC |
1294 | if (flags & GV_NOTQUAL) { |
1295 | /* Caller promised that there is no stash, so we can skip the check. */ | |
1296 | len = full_len; | |
1297 | goto no_stash; | |
1298 | } | |
1299 | ||
b208e10c NC |
1300 | if (full_len > 2 && *name == '*' && isALPHA(name[1])) { |
1301 | /* accidental stringify on a GV? */ | |
c07a80fd | 1302 | name++; |
b208e10c | 1303 | } |
c07a80fd | 1304 | |
b3d904f3 | 1305 | for (name_cursor = name; name_cursor < name_end; name_cursor++) { |
46c0ec20 FC |
1306 | if (name_cursor < name_em1 && |
1307 | ((*name_cursor == ':' | |
b3d904f3 | 1308 | && name_cursor[1] == ':') |
46c0ec20 | 1309 | || *name_cursor == '\'')) |
463ee0b2 | 1310 | { |
463ee0b2 | 1311 | if (!stash) |
3280af22 | 1312 | stash = PL_defstash; |
dc437b57 | 1313 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0714e2c | 1314 | return NULL; |
463ee0b2 | 1315 | |
b3d904f3 | 1316 | len = name_cursor - name; |
088225fd | 1317 | if (name_cursor > nambeg) { /* Skip for initial :: or ' */ |
3a5b580c NC |
1318 | const char *key; |
1319 | if (*name_cursor == ':') { | |
1320 | key = name; | |
e771aaa9 NC |
1321 | len += 2; |
1322 | } else { | |
3a5b580c | 1323 | char *tmpbuf; |
2ae0db35 | 1324 | Newx(tmpbuf, len+2, char); |
e771aaa9 NC |
1325 | Copy(name, tmpbuf, len, char); |
1326 | tmpbuf[len++] = ':'; | |
1327 | tmpbuf[len++] = ':'; | |
3a5b580c | 1328 | key = tmpbuf; |
e771aaa9 | 1329 | } |
3a5b580c | 1330 | gvp = (GV**)hv_fetch(stash, key, len, add); |
a0714e2c | 1331 | gv = gvp ? *gvp : NULL; |
159b6efe | 1332 | if (gv && gv != (const GV *)&PL_sv_undef) { |
6fa846a0 | 1333 | if (SvTYPE(gv) != SVt_PVGV) |
3a5b580c | 1334 | gv_init(gv, stash, key, len, (add & GV_ADDMULTI)); |
6fa846a0 GS |
1335 | else |
1336 | GvMULTI_on(gv); | |
1337 | } | |
3a5b580c | 1338 | if (key != name) |
b9d2ea5b | 1339 | Safefree(key); |
159b6efe | 1340 | if (!gv || gv == (const GV *)&PL_sv_undef) |
a0714e2c | 1341 | return NULL; |
85e6fe83 | 1342 | |
463ee0b2 | 1343 | if (!(stash = GvHV(gv))) |
298d6511 | 1344 | { |
99ee9762 FC |
1345 | stash = GvHV(gv) = newHV(); |
1346 | if (!HvNAME_get(stash)) { | |
e058c50a FC |
1347 | if (GvSTASH(gv) == PL_defstash && len == 6 |
1348 | && strnEQ(name, "CORE", 4)) | |
1349 | hv_name_set(stash, "CORE", 4, 0); | |
1350 | else | |
1351 | hv_name_set( | |
1352 | stash, nambeg, name_cursor-nambeg, 0 | |
1353 | ); | |
99ee9762 FC |
1354 | /* If the containing stash has multiple effective |
1355 | names, see that this one gets them, too. */ | |
1356 | if (HvAUX(GvSTASH(gv))->xhv_name_count) | |
1357 | mro_package_moved(stash, NULL, gv, 1); | |
1358 | } | |
298d6511 | 1359 | } |
99ee9762 FC |
1360 | else if (!HvNAME_get(stash)) |
1361 | hv_name_set(stash, nambeg, name_cursor - nambeg, 0); | |
463ee0b2 LW |
1362 | } |
1363 | ||
b3d904f3 NC |
1364 | if (*name_cursor == ':') |
1365 | name_cursor++; | |
088225fd | 1366 | name = name_cursor+1; |
ad6bfa9d | 1367 | if (name == name_end) |
159b6efe NC |
1368 | return gv |
1369 | ? gv : MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); | |
79072805 | 1370 | } |
79072805 | 1371 | } |
b3d904f3 | 1372 | len = name_cursor - name; |
463ee0b2 LW |
1373 | |
1374 | /* No stash in name, so see how we can default */ | |
1375 | ||
1376 | if (!stash) { | |
fafc274c | 1377 | no_stash: |
8ccce9ae | 1378 | if (len && isIDFIRST_lazy(name)) { |
9607fc9c | 1379 | bool global = FALSE; |
1380 | ||
8ccce9ae NC |
1381 | switch (len) { |
1382 | case 1: | |
18ea00d7 | 1383 | if (*name == '_') |
9d116dd7 | 1384 | global = TRUE; |
18ea00d7 | 1385 | break; |
8ccce9ae NC |
1386 | case 3: |
1387 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1388 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1389 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
9d116dd7 | 1390 | global = TRUE; |
18ea00d7 | 1391 | break; |
8ccce9ae NC |
1392 | case 4: |
1393 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1394 | && name[3] == 'V') | |
9d116dd7 | 1395 | global = TRUE; |
18ea00d7 | 1396 | break; |
8ccce9ae NC |
1397 | case 5: |
1398 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1399 | && name[3] == 'I' && name[4] == 'N') | |
463ee0b2 | 1400 | global = TRUE; |
18ea00d7 | 1401 | break; |
8ccce9ae NC |
1402 | case 6: |
1403 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1404 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1405 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
1406 | global = TRUE; | |
1407 | break; | |
1408 | case 7: | |
1409 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1410 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1411 | && name[6] == 'T') | |
18ea00d7 NC |
1412 | global = TRUE; |
1413 | break; | |
463ee0b2 | 1414 | } |
9607fc9c | 1415 | |
463ee0b2 | 1416 | if (global) |
3280af22 | 1417 | stash = PL_defstash; |
923e4eb5 | 1418 | else if (IN_PERL_COMPILETIME) { |
3280af22 NIS |
1419 | stash = PL_curstash; |
1420 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
748a9306 LW |
1421 | sv_type != SVt_PVCV && |
1422 | sv_type != SVt_PVGV && | |
4633a7c4 | 1423 | sv_type != SVt_PVFM && |
c07a80fd | 1424 | sv_type != SVt_PVIO && |
70ec6265 NC |
1425 | !(len == 1 && sv_type == SVt_PV && |
1426 | (*name == 'a' || *name == 'b')) ) | |
748a9306 | 1427 | { |
4633a7c4 LW |
1428 | gvp = (GV**)hv_fetch(stash,name,len,0); |
1429 | if (!gvp || | |
159b6efe | 1430 | *gvp == (const GV *)&PL_sv_undef || |
a5f75d66 AD |
1431 | SvTYPE(*gvp) != SVt_PVGV) |
1432 | { | |
d4c19fe8 | 1433 | stash = NULL; |
a5f75d66 | 1434 | } |
155aba94 GS |
1435 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
1436 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1437 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
4633a7c4 | 1438 | { |
fe13d51d | 1439 | /* diag_listed_as: Variable "%s" is not imported%s */ |
413ff9f6 FC |
1440 | Perl_ck_warner_d( |
1441 | aTHX_ packWARN(WARN_MISC), | |
1442 | "Variable \"%c%s\" is not imported", | |
4633a7c4 LW |
1443 | sv_type == SVt_PVAV ? '@' : |
1444 | sv_type == SVt_PVHV ? '%' : '$', | |
1445 | name); | |
8ebc5c01 | 1446 | if (GvCVu(*gvp)) |
413ff9f6 FC |
1447 | Perl_ck_warner_d( |
1448 | aTHX_ packWARN(WARN_MISC), | |
1449 | "\t(Did you mean &%s instead?)\n", name | |
1450 | ); | |
d4c19fe8 | 1451 | stash = NULL; |
4633a7c4 | 1452 | } |
a0d0e21e | 1453 | } |
85e6fe83 | 1454 | } |
463ee0b2 | 1455 | else |
1d7c1841 | 1456 | stash = CopSTASH(PL_curcop); |
463ee0b2 LW |
1457 | } |
1458 | else | |
3280af22 | 1459 | stash = PL_defstash; |
463ee0b2 LW |
1460 | } |
1461 | ||
1462 | /* By this point we should have a stash and a name */ | |
1463 | ||
a0d0e21e | 1464 | if (!stash) { |
5a844595 | 1465 | if (add) { |
9d4ba2ae | 1466 | SV * const err = Perl_mess(aTHX_ |
5a844595 GS |
1467 | "Global symbol \"%s%s\" requires explicit package name", |
1468 | (sv_type == SVt_PV ? "$" | |
1469 | : sv_type == SVt_PVAV ? "@" | |
1470 | : sv_type == SVt_PVHV ? "%" | |
608b3986 | 1471 | : ""), name); |
e7f343b6 | 1472 | GV *gv; |
608b3986 AE |
1473 | if (USE_UTF8_IN_NAMES) |
1474 | SvUTF8_on(err); | |
1475 | qerror(err); | |
76f68e9b | 1476 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
e7f343b6 NC |
1477 | if(!gv) { |
1478 | /* symbol table under destruction */ | |
1479 | return NULL; | |
1480 | } | |
1481 | stash = GvHV(gv); | |
a0d0e21e | 1482 | } |
d7aacf4e | 1483 | else |
a0714e2c | 1484 | return NULL; |
a0d0e21e LW |
1485 | } |
1486 | ||
1487 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
a0714e2c | 1488 | return NULL; |
a0d0e21e | 1489 | |
79072805 | 1490 | gvp = (GV**)hv_fetch(stash,name,len,add); |
23496c6e FC |
1491 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) { |
1492 | if (addmg) gv = (GV *)newSV(0); | |
1493 | else return NULL; | |
1494 | } | |
914ecc63 FC |
1495 | else gv = *gvp, addmg = 0; |
1496 | /* From this point on, addmg means gv has not been inserted in the | |
1497 | symtab yet. */ | |
1498 | ||
79072805 | 1499 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e | 1500 | if (add) { |
a5f75d66 | 1501 | GvMULTI_on(gv); |
e6066781 | 1502 | gv_init_svtype(gv, sv_type); |
ccdda9cb NC |
1503 | if (len == 1 && stash == PL_defstash |
1504 | && (sv_type == SVt_PVHV || sv_type == SVt_PVGV)) { | |
44a2ac75 YO |
1505 | if (*name == '!') |
1506 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); | |
45cbc99a | 1507 | else if (*name == '-' || *name == '+') |
192b9cd1 | 1508 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
45cbc99a | 1509 | } |
af16de9f FC |
1510 | else if (len == 3 && sv_type == SVt_PVAV |
1511 | && strnEQ(name, "ISA", 3) | |
1512 | && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv)))) | |
1513 | gv_magicalize_isa(gv); | |
a0d0e21e | 1514 | } |
79072805 | 1515 | return gv; |
add2581e | 1516 | } else if (no_init) { |
23496c6e | 1517 | assert(!addmg); |
55d729e4 | 1518 | return gv; |
e26df76a | 1519 | } else if (no_expand && SvROK(gv)) { |
23496c6e | 1520 | assert(!addmg); |
e26df76a | 1521 | return gv; |
79072805 | 1522 | } |
93a17b20 | 1523 | |
5e0caaeb NC |
1524 | /* Adding a new symbol. |
1525 | Unless of course there was already something non-GV here, in which case | |
1526 | we want to behave as if there was always a GV here, containing some sort | |
1527 | of subroutine. | |
1528 | Otherwise we run the risk of creating things like GvIO, which can cause | |
1529 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
1530 | ||
1531 | faking_it = SvOK(gv); | |
93a17b20 | 1532 | |
9b387841 NC |
1533 | if (add & GV_ADDWARN) |
1534 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), "Had to create %s unexpectedly", nambeg); | |
55d729e4 | 1535 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
93a17b20 | 1536 | |
a0288114 | 1537 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
7272584d | 1538 | : (PL_dowarn & G_WARN_ON ) ) ) |
0453d815 PM |
1539 | GvMULTI_on(gv) ; |
1540 | ||
93a17b20 | 1541 | /* set up magic where warranted */ |
44428a46 FC |
1542 | if (stash != PL_defstash) { /* not the main stash */ |
1543 | /* We only have to check for four names here: EXPORT, ISA, OVERLOAD | |
4aaa4757 FC |
1544 | and VERSION. All the others apply only to the main stash or to |
1545 | CORE (which is checked right after this). */ | |
f4e68e82 | 1546 | if (len > 2) { |
b464bac0 | 1547 | const char * const name2 = name + 1; |
cc4c2da6 | 1548 | switch (*name) { |
cc4c2da6 NC |
1549 | case 'E': |
1550 | if (strnEQ(name2, "XPORT", 5)) | |
1551 | GvMULTI_on(gv); | |
1552 | break; | |
1553 | case 'I': | |
44428a46 | 1554 | if (strEQ(name2, "SA")) |
290a1700 | 1555 | gv_magicalize_isa(gv); |
cc4c2da6 NC |
1556 | break; |
1557 | case 'O': | |
44428a46 | 1558 | if (strEQ(name2, "VERLOAD")) |
ad7cce9f | 1559 | gv_magicalize_overload(gv); |
cc4c2da6 | 1560 | break; |
44428a46 FC |
1561 | case 'V': |
1562 | if (strEQ(name2, "ERSION")) | |
1563 | GvMULTI_on(gv); | |
1564 | break; | |
4aaa4757 FC |
1565 | default: |
1566 | goto try_core; | |
1567 | } | |
23496c6e | 1568 | goto add_magical_gv; |
4aaa4757 FC |
1569 | } |
1570 | try_core: | |
1571 | if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) { | |
1572 | /* Avoid null warning: */ | |
1573 | const char * const stashname = HvNAME(stash); assert(stashname); | |
0f8d4b5e FC |
1574 | if (strnEQ(stashname, "CORE", 4) |
1575 | && S_maybe_add_coresub(aTHX_ | |
1576 | addmg ? stash : 0, gv, name, len, nambeg, full_len | |
1577 | )) | |
1578 | addmg = 0; | |
44428a46 FC |
1579 | } |
1580 | } | |
1581 | else if (len > 1) { | |
1582 | #ifndef EBCDIC | |
1583 | if (*name > 'V' ) { | |
1584 | NOOP; | |
1585 | /* Nothing else to do. | |
1586 | The compiler will probably turn the switch statement into a | |
1587 | branch table. Make sure we avoid even that small overhead for | |
1588 | the common case of lower case variable names. */ | |
1589 | } else | |
1590 | #endif | |
1591 | { | |
1592 | const char * const name2 = name + 1; | |
1593 | switch (*name) { | |
1594 | case 'A': | |
1595 | if (strEQ(name2, "RGV")) { | |
1596 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
1597 | } | |
1598 | else if (strEQ(name2, "RGVOUT")) { | |
1599 | GvMULTI_on(gv); | |
1600 | } | |
1601 | break; | |
1602 | case 'E': | |
1603 | if (strnEQ(name2, "XPORT", 5)) | |
1604 | GvMULTI_on(gv); | |
1605 | break; | |
1606 | case 'I': | |
1607 | if (strEQ(name2, "SA")) { | |
290a1700 | 1608 | gv_magicalize_isa(gv); |
44428a46 FC |
1609 | } |
1610 | break; | |
1611 | case 'O': | |
1612 | if (strEQ(name2, "VERLOAD")) { | |
ad7cce9f | 1613 | gv_magicalize_overload(gv); |
44428a46 FC |
1614 | } |
1615 | break; | |
cc4c2da6 NC |
1616 | case 'S': |
1617 | if (strEQ(name2, "IG")) { | |
1618 | HV *hv; | |
1619 | I32 i; | |
d525a7b2 NC |
1620 | if (!PL_psig_name) { |
1621 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); | |
a02a5408 | 1622 | Newxz(PL_psig_pend, SIG_SIZE, int); |
d525a7b2 | 1623 | PL_psig_ptr = PL_psig_name + SIG_SIZE; |
0bdedcb3 NC |
1624 | } else { |
1625 | /* I think that the only way to get here is to re-use an | |
1626 | embedded perl interpreter, where the previous | |
1627 | use didn't clean up fully because | |
1628 | PL_perl_destruct_level was 0. I'm not sure that we | |
1629 | "support" that, in that I suspect in that scenario | |
1630 | there are sufficient other garbage values left in the | |
1631 | interpreter structure that something else will crash | |
1632 | before we get here. I suspect that this is one of | |
1633 | those "doctor, it hurts when I do this" bugs. */ | |
d525a7b2 | 1634 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); |
0bdedcb3 | 1635 | Zero(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 NC |
1636 | } |
1637 | GvMULTI_on(gv); | |
1638 | hv = GvHVn(gv); | |
a0714e2c | 1639 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 1640 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 1641 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
1642 | if (init) |
1643 | sv_setsv(*init, &PL_sv_undef); | |
cc4c2da6 NC |
1644 | } |
1645 | } | |
1646 | break; | |
1647 | case 'V': | |
1648 | if (strEQ(name2, "ERSION")) | |
1649 | GvMULTI_on(gv); | |
1650 | break; | |
e5218da5 GA |
1651 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1652 | if (strEQ(name2, "HILD_ERROR_NATIVE")) | |
1653 | goto magicalize; | |
1654 | break; | |
cc4c2da6 NC |
1655 | case '\005': /* $^ENCODING */ |
1656 | if (strEQ(name2, "NCODING")) | |
1657 | goto magicalize; | |
1658 | break; | |
9ebf26ad FR |
1659 | case '\007': /* $^GLOBAL_PHASE */ |
1660 | if (strEQ(name2, "LOBAL_PHASE")) | |
1661 | goto ro_magicalize; | |
1662 | break; | |
cde0cee5 YO |
1663 | case '\015': /* $^MATCH */ |
1664 | if (strEQ(name2, "ATCH")) | |
2fdbfb4d | 1665 | goto magicalize; |
cc4c2da6 NC |
1666 | case '\017': /* $^OPEN */ |
1667 | if (strEQ(name2, "PEN")) | |
1668 | goto magicalize; | |
1669 | break; | |
cde0cee5 YO |
1670 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
1671 | if (strEQ(name2, "REMATCH") || strEQ(name2, "OSTMATCH")) | |
9ebf26ad FR |
1672 | goto magicalize; |
1673 | break; | |
cc4c2da6 NC |
1674 | case '\024': /* ${^TAINT} */ |
1675 | if (strEQ(name2, "AINT")) | |
1676 | goto ro_magicalize; | |
1677 | break; | |
7cebcbc0 | 1678 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 | 1679 | if (strEQ(name2, "NICODE")) |
cc4c2da6 | 1680 | goto ro_magicalize; |
a0288114 | 1681 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 | 1682 | goto ro_magicalize; |
e07ea26a NC |
1683 | if (strEQ(name2, "TF8CACHE")) |
1684 | goto magicalize; | |
cc4c2da6 NC |
1685 | break; |
1686 | case '\027': /* $^WARNING_BITS */ | |
1687 | if (strEQ(name2, "ARNING_BITS")) | |
1688 | goto magicalize; | |
1689 | break; | |
1690 | case '1': | |
1691 | case '2': | |
1692 | case '3': | |
1693 | case '4': | |
1694 | case '5': | |
1695 | case '6': | |
1696 | case '7': | |
1697 | case '8': | |
1698 | case '9': | |
85e6fe83 | 1699 | { |
2fdbfb4d AB |
1700 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
1701 | this test */ | |
1702 | /* This snippet is taken from is_gv_magical */ | |
cc4c2da6 NC |
1703 | const char *end = name + len; |
1704 | while (--end > name) { | |
23496c6e | 1705 | if (!isDIGIT(*end)) goto add_magical_gv; |
cc4c2da6 | 1706 | } |
2fdbfb4d | 1707 | goto magicalize; |
1d7c1841 | 1708 | } |
dc437b57 | 1709 | } |
93a17b20 | 1710 | } |
392db708 NC |
1711 | } else { |
1712 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
1713 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 | 1714 | switch (*name) { |
6361f656 AB |
1715 | case '&': /* $& */ |
1716 | case '`': /* $` */ | |
1717 | case '\'': /* $' */ | |
cc4c2da6 NC |
1718 | if ( |
1719 | sv_type == SVt_PVAV || | |
1720 | sv_type == SVt_PVHV || | |
1721 | sv_type == SVt_PVCV || | |
1722 | sv_type == SVt_PVFM || | |
1723 | sv_type == SVt_PVIO | |
1724 | ) { break; } | |
1725 | PL_sawampersand = TRUE; | |
2fdbfb4d | 1726 | goto magicalize; |
cc4c2da6 | 1727 | |
6361f656 | 1728 | case ':': /* $: */ |
c69033f2 | 1729 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
1730 | goto magicalize; |
1731 | ||
6361f656 | 1732 | case '?': /* $? */ |
ff0cee69 | 1733 | #ifdef COMPLEX_STATUS |
c69033f2 | 1734 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 1735 | #endif |
cc4c2da6 | 1736 | goto magicalize; |
ff0cee69 | 1737 | |
6361f656 | 1738 | case '!': /* $! */ |
67261566 | 1739 | GvMULTI_on(gv); |
44a2ac75 | 1740 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 1741 | |
ad64d0ec | 1742 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 | 1743 | |
44a2ac75 | 1744 | /* magicalization must be done before require_tie_mod is called */ |
67261566 | 1745 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
44a2ac75 | 1746 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
d2c93421 | 1747 | |
6cef1e77 | 1748 | break; |
6361f656 AB |
1749 | case '-': /* $- */ |
1750 | case '+': /* $+ */ | |
44a2ac75 YO |
1751 | GvMULTI_on(gv); /* no used once warnings here */ |
1752 | { | |
44a2ac75 | 1753 | AV* const av = GvAVn(gv); |
ad64d0ec | 1754 | SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL; |
44a2ac75 | 1755 | |
ad64d0ec NC |
1756 | sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0); |
1757 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
67261566 | 1758 | if (avc) |
44a2ac75 | 1759 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 | 1760 | SvREADONLY_on(av); |
67261566 YO |
1761 | |
1762 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
192b9cd1 | 1763 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
67261566 | 1764 | |
80305961 | 1765 | break; |
cc4c2da6 | 1766 | } |
6361f656 AB |
1767 | case '*': /* $* */ |
1768 | case '#': /* $# */ | |
9b387841 NC |
1769 | if (sv_type == SVt_PV) |
1770 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), | |
1771 | "$%c is no longer supported", *name); | |
8ae1fe26 | 1772 | break; |
6361f656 | 1773 | case '|': /* $| */ |
c69033f2 | 1774 | sv_setiv(GvSVn(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
cc4c2da6 NC |
1775 | goto magicalize; |
1776 | ||
b3ca2e83 NC |
1777 | case '\010': /* $^H */ |
1778 | { | |
1779 | HV *const hv = GvHVn(gv); | |
1780 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
1781 | } | |
1782 | goto magicalize; | |
cc4c2da6 | 1783 | case '\023': /* $^S */ |
2fdbfb4d AB |
1784 | ro_magicalize: |
1785 | SvREADONLY_on(GvSVn(gv)); | |
1786 | /* FALL THROUGH */ | |
6361f656 AB |
1787 | case '0': /* $0 */ |
1788 | case '1': /* $1 */ | |
1789 | case '2': /* $2 */ | |
1790 | case '3': /* $3 */ | |
1791 | case '4': /* $4 */ | |
1792 | case '5': /* $5 */ | |
1793 | case '6': /* $6 */ | |
1794 | case '7': /* $7 */ | |
1795 | case '8': /* $8 */ | |
1796 | case '9': /* $9 */ | |
1797 | case '[': /* $[ */ | |
1798 | case '^': /* $^ */ | |
1799 | case '~': /* $~ */ | |
1800 | case '=': /* $= */ | |
1801 | case '%': /* $% */ | |
1802 | case '.': /* $. */ | |
1803 | case '(': /* $( */ | |
1804 | case ')': /* $) */ | |
1805 | case '<': /* $< */ | |
1806 | case '>': /* $> */ | |
1807 | case '\\': /* $\ */ | |
1808 | case '/': /* $/ */ | |
9cdac2a2 | 1809 | case '$': /* $$ */ |
cc4c2da6 NC |
1810 | case '\001': /* $^A */ |
1811 | case '\003': /* $^C */ | |
1812 | case '\004': /* $^D */ | |
1813 | case '\005': /* $^E */ | |
1814 | case '\006': /* $^F */ | |
cc4c2da6 NC |
1815 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1816 | case '\016': /* $^N */ | |
1817 | case '\017': /* $^O */ | |
1818 | case '\020': /* $^P */ | |
1819 | case '\024': /* $^T */ | |
1820 | case '\027': /* $^W */ | |
1821 | magicalize: | |
ad64d0ec | 1822 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
cc4c2da6 | 1823 | break; |
e521374c | 1824 | |
cc4c2da6 | 1825 | case '\014': /* $^L */ |
76f68e9b | 1826 | sv_setpvs(GvSVn(gv),"\f"); |
c69033f2 | 1827 | PL_formfeed = GvSVn(gv); |
463ee0b2 | 1828 | break; |
6361f656 | 1829 | case ';': /* $; */ |
76f68e9b | 1830 | sv_setpvs(GvSVn(gv),"\034"); |
463ee0b2 | 1831 | break; |
6361f656 | 1832 | case ']': /* $] */ |
cc4c2da6 | 1833 | { |
3638bf15 | 1834 | SV * const sv = GvSV(gv); |
d7aa5382 | 1835 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 1836 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
1837 | GvSV(gv) = vnumify(PL_patchlevel); |
1838 | SvREADONLY_on(GvSV(gv)); | |
1839 | SvREFCNT_dec(sv); | |
93a17b20 LW |
1840 | } |
1841 | break; | |
cc4c2da6 NC |
1842 | case '\026': /* $^V */ |
1843 | { | |
3638bf15 | 1844 | SV * const sv = GvSV(gv); |
f9be5ac8 DM |
1845 | GvSV(gv) = new_version(PL_patchlevel); |
1846 | SvREADONLY_on(GvSV(gv)); | |
1847 | SvREFCNT_dec(sv); | |
16070b82 GS |
1848 | } |
1849 | break; | |
cc4c2da6 | 1850 | } |
79072805 | 1851 | } |
23496c6e FC |
1852 | add_magical_gv: |
1853 | if (addmg) { | |
1854 | if (GvAV(gv) || GvHV(gv) || GvIO(gv) || GvCV(gv) || ( | |
1855 | GvSV(gv) && (SvOK(GvSV(gv)) || SvMAGICAL(GvSV(gv))) | |
1856 | )) | |
0f43181e | 1857 | (void)hv_store(stash,name,len,(SV *)gv,0); |
23496c6e FC |
1858 | else SvREFCNT_dec(gv), gv = NULL; |
1859 | } | |
e6066781 | 1860 | if (gv) gv_init_svtype(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 | 1861 | return gv; |
79072805 LW |
1862 | } |
1863 | ||
1864 | void | |
35a4481c | 1865 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1866 | { |
35a4481c | 1867 | const char *name; |
7423f6db | 1868 | STRLEN namelen; |
35a4481c | 1869 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
1870 | |
1871 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
1872 | ||
43693395 | 1873 | if (!hv) { |
0c34ef67 | 1874 | SvOK_off(sv); |
43693395 GS |
1875 | return; |
1876 | } | |
666ea192 | 1877 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 1878 | |
bfcb3514 | 1879 | name = HvNAME_get(hv); |
7423f6db NC |
1880 | if (name) { |
1881 | namelen = HvNAMELEN_get(hv); | |
1882 | } else { | |
e27ad1f2 | 1883 | name = "__ANON__"; |
7423f6db NC |
1884 | namelen = 8; |
1885 | } | |
a0288114 | 1886 | |
e27ad1f2 | 1887 | if (keepmain || strNE(name, "main")) { |
7423f6db | 1888 | sv_catpvn(sv,name,namelen); |
396482e1 | 1889 | sv_catpvs(sv,"::"); |
43693395 | 1890 | } |
257984c0 | 1891 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
43693395 GS |
1892 | } |
1893 | ||
1894 | void | |
35a4481c | 1895 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 1896 | { |
099be4f1 | 1897 | const GV * const egv = GvEGVx(gv); |
7918f24d NC |
1898 | |
1899 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
1900 | ||
46c461b5 | 1901 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
1902 | } |
1903 | ||
79072805 | 1904 | void |
1146e912 | 1905 | Perl_gv_check(pTHX_ const HV *stash) |
79072805 | 1906 | { |
97aff369 | 1907 | dVAR; |
79072805 | 1908 | register I32 i; |
463ee0b2 | 1909 | |
7918f24d NC |
1910 | PERL_ARGS_ASSERT_GV_CHECK; |
1911 | ||
8990e307 LW |
1912 | if (!HvARRAY(stash)) |
1913 | return; | |
a0d0e21e | 1914 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 1915 | const HE *entry; |
dc437b57 | 1916 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
b7787f18 AL |
1917 | register GV *gv; |
1918 | HV *hv; | |
dc437b57 | 1919 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
159b6efe | 1920 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 1921 | { |
19b6c847 | 1922 | if (hv != PL_defstash && hv != stash) |
a0d0e21e LW |
1923 | gv_check(hv); /* nested package */ |
1924 | } | |
dc437b57 | 1925 | else if (isALPHA(*HeKEY(entry))) { |
e1ec3a88 | 1926 | const char *file; |
159b6efe | 1927 | gv = MUTABLE_GV(HeVAL(entry)); |
55d729e4 | 1928 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 1929 | continue; |
1d7c1841 | 1930 | file = GvFILE(gv); |
1d7c1841 GS |
1931 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1932 | #ifdef USE_ITHREADS | |
dd374669 | 1933 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ |
1d7c1841 | 1934 | #else |
9bde8eb0 NC |
1935 | CopFILEGV(PL_curcop) |
1936 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
1d7c1841 | 1937 | #endif |
9014280d | 1938 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
599cee73 | 1939 | "Name \"%s::%s\" used only once: possible typo", |
bfcb3514 | 1940 | HvNAME_get(stash), GvNAME(gv)); |
463ee0b2 | 1941 | } |
79072805 LW |
1942 | } |
1943 | } | |
1944 | } | |
1945 | ||
1946 | GV * | |
e1ec3a88 | 1947 | Perl_newGVgen(pTHX_ const char *pack) |
79072805 | 1948 | { |
97aff369 | 1949 | dVAR; |
7918f24d NC |
1950 | |
1951 | PERL_ARGS_ASSERT_NEWGVGEN; | |
1952 | ||
cea2e8a9 | 1953 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
6fd99bb3 | 1954 | GV_ADD, SVt_PVGV); |
79072805 LW |
1955 | } |
1956 | ||
1957 | /* hopefully this is only called on local symbol table entries */ | |
1958 | ||
1959 | GP* | |
864dbfa3 | 1960 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 1961 | { |
97aff369 | 1962 | dVAR; |
1d7c1841 | 1963 | if (!gp) |
d4c19fe8 | 1964 | return NULL; |
79072805 | 1965 | gp->gp_refcnt++; |
44a8e56a | 1966 | if (gp->gp_cv) { |
1967 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
1968 | /* If the GP they asked for a reference to contains |
1969 | a method cache entry, clear it first, so that we | |
1970 | don't infect them with our cached entry */ | |
44a8e56a | 1971 | SvREFCNT_dec(gp->gp_cv); |
601f1833 | 1972 | gp->gp_cv = NULL; |
44a8e56a | 1973 | gp->gp_cvgen = 0; |
1974 | } | |
44a8e56a | 1975 | } |
79072805 | 1976 | return gp; |
79072805 LW |
1977 | } |
1978 | ||
1979 | void | |
864dbfa3 | 1980 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 1981 | { |
97aff369 | 1982 | dVAR; |
79072805 | 1983 | GP* gp; |
b0d55c99 | 1984 | int attempts = 100; |
79072805 | 1985 | |
f7877b28 | 1986 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 1987 | return; |
f248d071 | 1988 | if (gp->gp_refcnt == 0) { |
9b387841 NC |
1989 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
1990 | "Attempt to free unreferenced glob pointers" | |
1991 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
1992 | return; |
1993 | } | |
748a9306 LW |
1994 | if (--gp->gp_refcnt > 0) { |
1995 | if (gp->gp_egv == gv) | |
1996 | gp->gp_egv = 0; | |
c43ae56f | 1997 | GvGP_set(gv, NULL); |
79072805 | 1998 | return; |
748a9306 | 1999 | } |
79072805 | 2000 | |
b0d55c99 FC |
2001 | while (1) { |
2002 | /* Copy and null out all the glob slots, so destructors do not see | |
2003 | freed SVs. */ | |
2004 | HEK * const file_hek = gp->gp_file_hek; | |
2005 | SV * const sv = gp->gp_sv; | |
2006 | AV * const av = gp->gp_av; | |
2007 | HV * const hv = gp->gp_hv; | |
2008 | IO * const io = gp->gp_io; | |
2009 | CV * const cv = gp->gp_cv; | |
2010 | CV * const form = gp->gp_form; | |
2011 | ||
2012 | gp->gp_file_hek = NULL; | |
2013 | gp->gp_sv = NULL; | |
2014 | gp->gp_av = NULL; | |
2015 | gp->gp_hv = NULL; | |
2016 | gp->gp_io = NULL; | |
2017 | gp->gp_cv = NULL; | |
2018 | gp->gp_form = NULL; | |
2019 | ||
2020 | if (file_hek) | |
2021 | unshare_hek(file_hek); | |
2022 | ||
2023 | SvREFCNT_dec(sv); | |
2024 | SvREFCNT_dec(av); | |
2025 | /* FIXME - another reference loop GV -> symtab -> GV ? | |
2026 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
2027 | if (hv && SvTYPE(hv) == SVt_PVHV) { | |
2028 | const char *hvname = HvNAME_get(hv); | |
bfcb3514 | 2029 | if (PL_stashcache && hvname) |
b0d55c99 | 2030 | (void)hv_delete(PL_stashcache, hvname, HvNAMELEN_get(hv), |
7423f6db | 2031 | G_DISCARD); |
b0d55c99 FC |
2032 | SvREFCNT_dec(hv); |
2033 | } | |
2034 | SvREFCNT_dec(io); | |
2035 | SvREFCNT_dec(cv); | |
2036 | SvREFCNT_dec(form); | |
2037 | ||
2038 | if (!gp->gp_file_hek | |
2039 | && !gp->gp_sv | |
2040 | && !gp->gp_av | |
2041 | && !gp->gp_hv | |
2042 | && !gp->gp_io | |
2043 | && !gp->gp_cv | |
2044 | && !gp->gp_form) break; | |
2045 | ||
2046 | if (--attempts == 0) { | |
2047 | Perl_die(aTHX_ | |
2048 | "panic: gp_free failed to free glob pointer - " | |
2049 | "something is repeatedly re-creating entries" | |
2050 | ); | |
2051 | } | |
13207a71 | 2052 | } |
748a9306 | 2053 | |
79072805 | 2054 | Safefree(gp); |
c43ae56f | 2055 | GvGP_set(gv, NULL); |
79072805 LW |
2056 | } |
2057 | ||
d460ef45 NIS |
2058 | int |
2059 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
2060 | { | |
53c1dcc0 AL |
2061 | AMT * const amtp = (AMT*)mg->mg_ptr; |
2062 | PERL_UNUSED_ARG(sv); | |
dd374669 | 2063 | |
7918f24d NC |
2064 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
2065 | ||
d460ef45 NIS |
2066 | if (amtp && AMT_AMAGIC(amtp)) { |
2067 | int i; | |
2068 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 2069 | CV * const cv = amtp->table[i]; |
b37c2d43 | 2070 | if (cv) { |
ad64d0ec | 2071 | SvREFCNT_dec(MUTABLE_SV(cv)); |
601f1833 | 2072 | amtp->table[i] = NULL; |
d460ef45 NIS |
2073 | } |
2074 | } | |
2075 | } | |
2076 | return 0; | |
2077 | } | |
2078 | ||
a0d0e21e | 2079 | /* Updates and caches the CV's */ |
c3a9a790 RGS |
2080 | /* Returns: |
2081 | * 1 on success and there is some overload | |
2082 | * 0 if there is no overload | |
2083 | * -1 if some error occurred and it couldn't croak | |
2084 | */ | |
a0d0e21e | 2085 | |
c3a9a790 | 2086 | int |
242f8760 | 2087 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e | 2088 | { |
97aff369 | 2089 | dVAR; |
ad64d0ec | 2090 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 | 2091 | AMT amt; |
9b439311 | 2092 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 2093 | U32 newgen; |
a0d0e21e | 2094 | |
7918f24d NC |
2095 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
2096 | ||
9b439311 | 2097 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
2098 | if (mg) { |
2099 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
2100 | if (amtp->was_ok_am == PL_amagic_generation | |
e1a479c5 | 2101 | && amtp->was_ok_sub == newgen) { |
c3a9a790 | 2102 | return AMT_OVERLOADED(amtp) ? 1 : 0; |
14899595 | 2103 | } |
ad64d0ec | 2104 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 | 2105 | } |
a0d0e21e | 2106 | |
bfcb3514 | 2107 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 2108 | |
d460ef45 | 2109 | Zero(&amt,1,AMT); |
3280af22 | 2110 | amt.was_ok_am = PL_amagic_generation; |
e1a479c5 | 2111 | amt.was_ok_sub = newgen; |
a6006777 | 2112 | amt.fallback = AMGfallNO; |
2113 | amt.flags = 0; | |
2114 | ||
a6006777 | 2115 | { |
32251b26 IZ |
2116 | int filled = 0, have_ovl = 0; |
2117 | int i, lim = 1; | |
a6006777 | 2118 | |
22c35a8c | 2119 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 2120 | |
89ffc314 | 2121 | /* Try to find via inheritance. */ |
e6919483 | 2122 | GV *gv = gv_fetchmeth_pvn(stash, PL_AMG_names[0], 2, -1, 0); |
53c1dcc0 AL |
2123 | SV * const sv = gv ? GvSV(gv) : NULL; |
2124 | CV* cv; | |
89ffc314 IZ |
2125 | |
2126 | if (!gv) | |
32251b26 | 2127 | lim = DESTROY_amg; /* Skip overloading entries. */ |
c69033f2 NC |
2128 | #ifdef PERL_DONT_CREATE_GVSV |
2129 | else if (!sv) { | |
6f207bd3 | 2130 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
c69033f2 NC |
2131 | } |
2132 | #endif | |
89ffc314 IZ |
2133 | else if (SvTRUE(sv)) |
2134 | amt.fallback=AMGfallYES; | |
2135 | else if (SvOK(sv)) | |
2136 | amt.fallback=AMGfallNEVER; | |
a6006777 | 2137 | |
32251b26 | 2138 | for (i = 1; i < lim; i++) |
601f1833 | 2139 | amt.table[i] = NULL; |
32251b26 | 2140 | for (; i < NofAMmeth; i++) { |
6136c704 | 2141 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 2142 | /* Human-readable form, for debugging: */ |
6136c704 | 2143 | const char * const cp = (i >= DESTROY_amg ? cooky : AMG_id2name(i)); |
d279ab82 | 2144 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 | 2145 | |
a0288114 | 2146 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 2147 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
2148 | /* don't fill the cache while looking up! |
2149 | Creation of inheritance stubs in intermediate packages may | |
2150 | conflict with the logic of runtime method substitution. | |
2151 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
2152 | then we could have created stubs for "(+0" in A and C too. | |
2153 | But if B overloads "bool", we may want to use it for | |
2154 | numifying instead of C's "+0". */ | |
2155 | if (i >= DESTROY_amg) | |
2156 | gv = Perl_gv_fetchmeth_autoload(aTHX_ stash, cooky, l, 0); | |
2157 | else /* Autoload taken care of below */ | |
e6919483 | 2158 | gv = Perl_gv_fetchmeth_pvn(aTHX_ stash, cooky, l, -1, 0); |
46fc3d4c | 2159 | cv = 0; |
89ffc314 | 2160 | if (gv && (cv = GvCV(gv))) { |
f0e9f182 FC |
2161 | if(GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")){ |
2162 | const char * const hvname = HvNAME_get(GvSTASH(CvGV(cv))); | |
2163 | if (hvname && HEK_LEN(HvNAME_HEK(GvSTASH(CvGV(cv)))) == 8 | |
2164 | && strEQ(hvname, "overload")) { | |
611c1e95 IZ |
2165 | /* This is a hack to support autoloading..., while |
2166 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 2167 | /* GvSV contains the name of the method. */ |
6136c704 | 2168 | GV *ngv = NULL; |
c69033f2 | 2169 | SV *gvsv = GvSV(gv); |
a0288114 AL |
2170 | |
2171 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
2172 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
f0e9f182 | 2173 | (void*)GvSV(gv), cp, HvNAME(stash)) ); |
c69033f2 NC |
2174 | if (!gvsv || !SvPOK(gvsv) |
2175 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX_const(gvsv), | |
dc848c6f | 2176 | FALSE))) |
2177 | { | |
a0288114 | 2178 | /* Can be an import stub (created by "can"). */ |
242f8760 | 2179 | if (destructing) { |
c3a9a790 | 2180 | return -1; |
242f8760 RGS |
2181 | } |
2182 | else { | |
2183 | const char * const name = (gvsv && SvPOK(gvsv)) ? SvPVX_const(gvsv) : "???"; | |
2184 | Perl_croak(aTHX_ "%s method \"%.256s\" overloading \"%s\" "\ | |
2185 | "in package \"%.256s\"", | |
2186 | (GvCVGEN(gv) ? "Stub found while resolving" | |
2187 | : "Can't resolve"), | |
f0e9f182 | 2188 | name, cp, HvNAME(stash)); |
242f8760 | 2189 | } |
44a8e56a | 2190 | } |
dc848c6f | 2191 | cv = GvCV(gv = ngv); |
f0e9f182 | 2192 | } |
44a8e56a | 2193 | } |
b464bac0 | 2194 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 2195 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 2196 | GvNAME(CvGV(cv))) ); |
2197 | filled = 1; | |
32251b26 IZ |
2198 | if (i < DESTROY_amg) |
2199 | have_ovl = 1; | |
611c1e95 | 2200 | } else if (gv) { /* Autoloaded... */ |
ea726b52 | 2201 | cv = MUTABLE_CV(gv); |
611c1e95 | 2202 | filled = 1; |
44a8e56a | 2203 | } |
ea726b52 | 2204 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); |
a0d0e21e | 2205 | } |
a0d0e21e | 2206 | if (filled) { |
a6006777 | 2207 | AMT_AMAGIC_on(&amt); |
32251b26 IZ |
2208 | if (have_ovl) |
2209 | AMT_OVERLOADED_on(&amt); | |
ad64d0ec | 2210 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2211 | (char*)&amt, sizeof(AMT)); |
32251b26 | 2212 | return have_ovl; |
a0d0e21e LW |
2213 | } |
2214 | } | |
a6006777 | 2215 | /* Here we have no table: */ |
9cbac4c7 | 2216 | /* no_table: */ |
a6006777 | 2217 | AMT_AMAGIC_off(&amt); |
ad64d0ec | 2218 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2219 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 | 2220 | return 0; |
a0d0e21e LW |
2221 | } |
2222 | ||
32251b26 IZ |
2223 | |
2224 | CV* | |
2225 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
2226 | { | |
97aff369 | 2227 | dVAR; |
3f8f4626 | 2228 | MAGIC *mg; |
32251b26 | 2229 | AMT *amtp; |
e1a479c5 | 2230 | U32 newgen; |
9b439311 | 2231 | struct mro_meta* stash_meta; |
32251b26 | 2232 | |
bfcb3514 | 2233 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 2234 | return NULL; |
e1a479c5 | 2235 | |
9b439311 BB |
2236 | stash_meta = HvMROMETA(stash); |
2237 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 2238 | |
ad64d0ec | 2239 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
2240 | if (!mg) { |
2241 | do_update: | |
242f8760 RGS |
2242 | /* If we're looking up a destructor to invoke, we must avoid |
2243 | * that Gv_AMupdate croaks, because we might be dying already */ | |
2dcac756 | 2244 | if (Gv_AMupdate(stash, cBOOL(id == DESTROY_amg)) == -1) { |
242f8760 RGS |
2245 | /* and if it didn't found a destructor, we fall back |
2246 | * to a simpler method that will only look for the | |
2247 | * destructor instead of the whole magic */ | |
2248 | if (id == DESTROY_amg) { | |
2249 | GV * const gv = gv_fetchmethod(stash, "DESTROY"); | |
2250 | if (gv) | |
2251 | return GvCV(gv); | |
2252 | } | |
2253 | return NULL; | |
2254 | } | |
ad64d0ec | 2255 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 | 2256 | } |
a9fd4e40 | 2257 | assert(mg); |
32251b26 IZ |
2258 | amtp = (AMT*)mg->mg_ptr; |
2259 | if ( amtp->was_ok_am != PL_amagic_generation | |
e1a479c5 | 2260 | || amtp->was_ok_sub != newgen ) |
32251b26 | 2261 | goto do_update; |
3ad83ce7 | 2262 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 2263 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
2264 | if (ret && isGV(ret)) { /* Autoloading stab */ |
2265 | /* Passing it through may have resulted in a warning | |
2266 | "Inherited AUTOLOAD for a non-method deprecated", since | |
2267 | our caller is going through a function call, not a method call. | |
2268 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 2269 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
2270 | |
2271 | if (gv && GvCV(gv)) | |
2272 | return GvCV(gv); | |
2273 | } | |
2274 | return ret; | |
2275 | } | |
a0288114 | 2276 | |
601f1833 | 2277 | return NULL; |
32251b26 IZ |
2278 | } |
2279 | ||
2280 | ||
6f1401dc DM |
2281 | /* Implement tryAMAGICun_MG macro. |
2282 | Do get magic, then see if the stack arg is overloaded and if so call it. | |
2283 | Flags: | |
2284 | AMGf_set return the arg using SETs rather than assigning to | |
2285 | the targ | |
2286 | AMGf_numeric apply sv_2num to the stack arg. | |
2287 | */ | |
2288 | ||
2289 | bool | |
2290 | Perl_try_amagic_un(pTHX_ int method, int flags) { | |
2291 | dVAR; | |
2292 | dSP; | |
2293 | SV* tmpsv; | |
2294 | SV* const arg = TOPs; | |
2295 | ||
2296 | SvGETMAGIC(arg); | |
2297 | ||
9f8bf298 NC |
2298 | if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method, |
2299 | AMGf_noright | AMGf_unary))) { | |
6f1401dc DM |
2300 | if (flags & AMGf_set) { |
2301 | SETs(tmpsv); | |
2302 | } | |
2303 | else { | |
2304 | dTARGET; | |
2305 | if (SvPADMY(TARG)) { | |
2306 | sv_setsv(TARG, tmpsv); | |
2307 | SETTARG; | |
2308 | } | |
2309 | else | |
2310 | SETs(tmpsv); | |
2311 | } | |
2312 | PUTBACK; | |
2313 | return TRUE; | |
2314 | } | |
2315 | ||
2316 | if ((flags & AMGf_numeric) && SvROK(arg)) | |
2317 | *sp = sv_2num(arg); | |
2318 | return FALSE; | |
2319 | } | |
2320 | ||
2321 | ||
2322 | /* Implement tryAMAGICbin_MG macro. | |
2323 | Do get magic, then see if the two stack args are overloaded and if so | |
2324 | call it. | |
2325 | Flags: | |
2326 | AMGf_set return the arg using SETs rather than assigning to | |
2327 | the targ | |
2328 | AMGf_assign op may be called as mutator (eg +=) | |
2329 | AMGf_numeric apply sv_2num to the stack arg. | |
2330 | */ | |
2331 | ||
2332 | bool | |
2333 | Perl_try_amagic_bin(pTHX_ int method, int flags) { | |
2334 | dVAR; | |
2335 | dSP; | |
2336 | SV* const left = TOPm1s; | |
2337 | SV* const right = TOPs; | |
2338 | ||
2339 | SvGETMAGIC(left); | |
2340 | if (left != right) | |
2341 | SvGETMAGIC(right); | |
2342 | ||
2343 | if (SvAMAGIC(left) || SvAMAGIC(right)) { | |
2344 | SV * const tmpsv = amagic_call(left, right, method, | |
2345 | ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0)); | |
2346 | if (tmpsv) { | |
2347 | if (flags & AMGf_set) { | |
2348 | (void)POPs; | |
2349 | SETs(tmpsv); | |
2350 | } | |
2351 | else { | |
2352 | dATARGET; | |
2353 | (void)POPs; | |
2354 | if (opASSIGN || SvPADMY(TARG)) { | |
2355 | sv_setsv(TARG, tmpsv); | |
2356 | SETTARG; | |
2357 | } | |
2358 | else | |
2359 | SETs(tmpsv); | |
2360 | } | |
2361 | PUTBACK; | |
2362 | return TRUE; | |
2363 | } | |
2364 | } | |
75ea7a12 FC |
2365 | if(left==right && SvGMAGICAL(left)) { |
2366 | SV * const left = sv_newmortal(); | |
2367 | *(sp-1) = left; | |
2368 | /* Print the uninitialized warning now, so it includes the vari- | |
2369 | able name. */ | |
2370 | if (!SvOK(right)) { | |
2371 | if (ckWARN(WARN_UNINITIALIZED)) report_uninit(right); | |
2372 | sv_setsv_flags(left, &PL_sv_no, 0); | |
2373 | } | |
2374 | else sv_setsv_flags(left, right, 0); | |
2375 | SvGETMAGIC(right); | |
2376 | } | |
6f1401dc | 2377 | if (flags & AMGf_numeric) { |
75ea7a12 FC |
2378 | if (SvROK(TOPm1s)) |
2379 | *(sp-1) = sv_2num(TOPm1s); | |
6f1401dc DM |
2380 | if (SvROK(right)) |
2381 | *sp = sv_2num(right); | |
2382 | } | |
2383 | return FALSE; | |
2384 | } | |
2385 | ||
25a9ffce NC |
2386 | SV * |
2387 | Perl_amagic_deref_call(pTHX_ SV *ref, int method) { | |
2388 | SV *tmpsv = NULL; | |
2389 | ||
2390 | PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL; | |
2391 | ||
2392 | while (SvAMAGIC(ref) && | |
2393 | (tmpsv = amagic_call(ref, &PL_sv_undef, method, | |
2394 | AMGf_noright | AMGf_unary))) { | |
2395 | if (!SvROK(tmpsv)) | |
2396 | Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); | |
2397 | if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) { | |
2398 | /* Bail out if it returns us the same reference. */ | |
2399 | return tmpsv; | |
2400 | } | |
2401 | ref = tmpsv; | |
2402 | } | |
2403 | return tmpsv ? tmpsv : ref; | |
2404 | } | |
6f1401dc | 2405 | |
a0d0e21e | 2406 | SV* |
864dbfa3 | 2407 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 2408 | { |
27da23d5 | 2409 | dVAR; |
b267980d | 2410 | MAGIC *mg; |
9c5ffd7c | 2411 | CV *cv=NULL; |
a0d0e21e | 2412 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 2413 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
2414 | int off = 0, off1, lr = 0, notfound = 0; |
2415 | int postpr = 0, force_cpy = 0; | |
2416 | int assign = AMGf_assign & flags; | |
2417 | const int assignshift = assign ? 1 : 0; | |
bf5522a1 | 2418 | int use_default_op = 0; |
497b47a8 JH |
2419 | #ifdef DEBUGGING |
2420 | int fl=0; | |
497b47a8 | 2421 | #endif |
25716404 | 2422 | HV* stash=NULL; |
7918f24d NC |
2423 | |
2424 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
2425 | ||
e46c382e | 2426 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
20439bc7 | 2427 | SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0); |
e46c382e YK |
2428 | |
2429 | if ( !lex_mask || !SvOK(lex_mask) ) | |
2430 | /* overloading lexically disabled */ | |
2431 | return NULL; | |
2432 | else if ( lex_mask && SvPOK(lex_mask) ) { | |
2433 | /* we have an entry in the hints hash, check if method has been | |
2434 | * masked by overloading.pm */ | |
d15cd831 | 2435 | STRLEN len; |
e46c382e | 2436 | const int offset = method / 8; |
d87d3eed | 2437 | const int bit = method % 8; |
e46c382e YK |
2438 | char *pv = SvPV(lex_mask, len); |
2439 | ||
d15cd831 | 2440 | /* Bit set, so this overloading operator is disabled */ |
ed15e576 | 2441 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) |
e46c382e YK |
2442 | return NULL; |
2443 | } | |
2444 | } | |
2445 | ||
a0d0e21e | 2446 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
25716404 | 2447 | && (stash = SvSTASH(SvRV(left))) |
ad64d0ec | 2448 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 2449 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 2450 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 2451 | : NULL)) |
b267980d | 2452 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
2453 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
2454 | * usual method */ | |
497b47a8 JH |
2455 | ( |
2456 | #ifdef DEBUGGING | |
2457 | fl = 1, | |
a0288114 | 2458 | #endif |
497b47a8 | 2459 | cv = cvp[off=method])))) { |
a0d0e21e LW |
2460 | lr = -1; /* Call method for left argument */ |
2461 | } else { | |
2462 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
2463 | int logic; | |
2464 | ||
2465 | /* look for substituted methods */ | |
ee239bfe | 2466 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
2467 | switch (method) { |
2468 | case inc_amg: | |
ee239bfe IZ |
2469 | force_cpy = 1; |
2470 | if ((cv = cvp[off=add_ass_amg]) | |
2471 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 2472 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
2473 | } |
2474 | break; | |
2475 | case dec_amg: | |
ee239bfe IZ |
2476 | force_cpy = 1; |
2477 | if ((cv = cvp[off = subtr_ass_amg]) | |
2478 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 2479 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
2480 | } |
2481 | break; | |
2482 | case bool__amg: | |
2483 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
2484 | break; | |
2485 | case numer_amg: | |
2486 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
2487 | break; | |
2488 | case string_amg: | |
2489 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
2490 | break; | |
b7787f18 AL |
2491 | case not_amg: |
2492 | (void)((cv = cvp[off=bool__amg]) | |
2493 | || (cv = cvp[off=numer_amg]) | |
2494 | || (cv = cvp[off=string_amg])); | |
2ab54efd MB |
2495 | if (cv) |
2496 | postpr = 1; | |
b7787f18 | 2497 | break; |
748a9306 LW |
2498 | case copy_amg: |
2499 | { | |
76e3520e GS |
2500 | /* |
2501 | * SV* ref causes confusion with the interpreter variable of | |
2502 | * the same name | |
2503 | */ | |
890ce7af | 2504 | SV* const tmpRef=SvRV(left); |
76e3520e | 2505 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 2506 | /* |
2507 | * Just to be extra cautious. Maybe in some | |
2508 | * additional cases sv_setsv is safe, too. | |
2509 | */ | |
890ce7af | 2510 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 2511 | SvOBJECT_on(newref); |
96d4b0ee NC |
2512 | /* As a bit of a source compatibility hack, SvAMAGIC() and |
2513 | friends dereference an RV, to behave the same was as when | |
2514 | overloading was stored on the reference, not the referant. | |
2515 | Hence we can't use SvAMAGIC_on() | |
2516 | */ | |
2517 | SvFLAGS(newref) |= SVf_AMAGIC; | |
85fbaab2 | 2518 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); |
748a9306 LW |
2519 | return newref; |
2520 | } | |
2521 | } | |
2522 | break; | |
a0d0e21e | 2523 | case abs_amg: |
b267980d | 2524 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 2525 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 2526 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 2527 | if (off1==lt_amg) { |
890ce7af | 2528 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
2529 | lt_amg,AMGf_noright); |
2530 | logic = SvTRUE(lessp); | |
2531 | } else { | |
890ce7af | 2532 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
2533 | ncmp_amg,AMGf_noright); |
2534 | logic = (SvNV(lessp) < 0); | |
2535 | } | |
2536 | if (logic) { | |
2537 | if (off==subtr_amg) { | |
2538 | right = left; | |
748a9306 | 2539 | left = nullsv; |
a0d0e21e LW |
2540 | lr = 1; |
2541 | } | |
2542 | } else { | |
2543 | return left; | |
2544 | } | |
2545 | } | |
2546 | break; | |
2547 | case neg_amg: | |
155aba94 | 2548 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
2549 | right = left; |
2550 | left = sv_2mortal(newSViv(0)); | |
2551 | lr = 1; | |
2552 | } | |
2553 | break; | |
f216259d | 2554 | case int_amg: |
f5284f61 | 2555 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
c4c7412c | 2556 | case ftest_amg: /* XXXX Eventually should do to_gv. */ |
d4b87e75 | 2557 | case regexp_amg: |
b267980d NIS |
2558 | /* FAIL safe */ |
2559 | return NULL; /* Delegate operation to standard mechanisms. */ | |
2560 | break; | |
f5284f61 IZ |
2561 | case to_sv_amg: |
2562 | case to_av_amg: | |
2563 | case to_hv_amg: | |
2564 | case to_gv_amg: | |
2565 | case to_cv_amg: | |
2566 | /* FAIL safe */ | |
b267980d | 2567 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 | 2568 | break; |
a0d0e21e LW |
2569 | default: |
2570 | goto not_found; | |
2571 | } | |
2572 | if (!cv) goto not_found; | |
2573 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
25716404 | 2574 | && (stash = SvSTASH(SvRV(right))) |
ad64d0ec | 2575 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 2576 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 2577 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 2578 | : NULL)) |
a0d0e21e LW |
2579 | && (cv = cvp[off=method])) { /* Method for right |
2580 | * argument found */ | |
2581 | lr=1; | |
bf5522a1 MB |
2582 | } else if (((cvp && amtp->fallback > AMGfallNEVER) |
2583 | || (ocvp && oamtp->fallback > AMGfallNEVER)) | |
a0d0e21e LW |
2584 | && !(flags & AMGf_unary)) { |
2585 | /* We look for substitution for | |
2586 | * comparison operations and | |
fc36a67e | 2587 | * concatenation */ |
a0d0e21e LW |
2588 | if (method==concat_amg || method==concat_ass_amg |
2589 | || method==repeat_amg || method==repeat_ass_amg) { | |
2590 | return NULL; /* Delegate operation to string conversion */ | |
2591 | } | |
2592 | off = -1; | |
2593 | switch (method) { | |
2594 | case lt_amg: | |
2595 | case le_amg: | |
2596 | case gt_amg: | |
2597 | case ge_amg: | |
2598 | case eq_amg: | |
2599 | case ne_amg: | |
2ab54efd MB |
2600 | off = ncmp_amg; |
2601 | break; | |
a0d0e21e LW |
2602 | case slt_amg: |
2603 | case sle_amg: | |
2604 | case sgt_amg: | |
2605 | case sge_amg: | |
2606 | case seq_amg: | |
2607 | case sne_amg: | |
2ab54efd MB |
2608 | off = scmp_amg; |
2609 | break; | |
a0d0e21e | 2610 | } |
bf5522a1 MB |
2611 | if (off != -1) { |
2612 | if (ocvp && (oamtp->fallback > AMGfallNEVER)) { | |
2613 | cv = ocvp[off]; | |
2614 | lr = -1; | |
2615 | } | |
2616 | if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) { | |
2617 | cv = cvp[off]; | |
2618 | lr = 1; | |
2619 | } | |
2620 | } | |
2621 | if (cv) | |
2ab54efd MB |
2622 | postpr = 1; |
2623 | else | |
2624 | goto not_found; | |
a0d0e21e | 2625 | } else { |
a6006777 | 2626 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
2627 | switch (method) { |
2628 | case to_sv_amg: | |
2629 | case to_av_amg: | |
2630 | case to_hv_amg: | |
2631 | case to_gv_amg: | |
2632 | case to_cv_amg: | |
2633 | /* FAIL safe */ | |
2634 | return left; /* Delegate operation to standard mechanisms. */ | |
2635 | break; | |
2636 | } | |
a0d0e21e LW |
2637 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
2638 | notfound = 1; lr = -1; | |
2639 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
2640 | notfound = 1; lr = 1; | |
bf5522a1 MB |
2641 | } else if ((use_default_op = |
2642 | (!ocvp || oamtp->fallback >= AMGfallYES) | |
2643 | && (!cvp || amtp->fallback >= AMGfallYES)) | |
2644 | && !DEBUG_o_TEST) { | |
4cc0ca18 NC |
2645 | /* Skip generating the "no method found" message. */ |
2646 | return NULL; | |
a0d0e21e | 2647 | } else { |
46fc3d4c | 2648 | SV *msg; |
774d564b | 2649 | if (off==-1) off=method; |
b267980d | 2650 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
a0288114 | 2651 | "Operation \"%s\": no method found,%sargument %s%s%s%s", |
89ffc314 | 2652 | AMG_id2name(method + assignshift), |
e7ea3e70 | 2653 | (flags & AMGf_unary ? " " : "\n\tleft "), |
b267980d | 2654 | SvAMAGIC(left)? |
a0d0e21e LW |
2655 | "in overloaded package ": |
2656 | "has no overloaded magic", | |
b267980d | 2657 | SvAMAGIC(left)? |
bfcb3514 | 2658 | HvNAME_get(SvSTASH(SvRV(left))): |
a0d0e21e | 2659 | "", |
b267980d | 2660 | SvAMAGIC(right)? |
e7ea3e70 | 2661 | ",\n\tright argument in overloaded package ": |
b267980d | 2662 | (flags & AMGf_unary |
e7ea3e70 IZ |
2663 | ? "" |
2664 | : ",\n\tright argument has no overloaded magic"), | |
b267980d | 2665 | SvAMAGIC(right)? |
bfcb3514 | 2666 | HvNAME_get(SvSTASH(SvRV(right))): |
46fc3d4c | 2667 | "")); |
bf5522a1 | 2668 | if (use_default_op) { |
b15aece3 | 2669 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX_const(msg)) ); |
a0d0e21e | 2670 | } else { |
be2597df | 2671 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e LW |
2672 | } |
2673 | return NULL; | |
2674 | } | |
ee239bfe | 2675 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
2676 | } |
2677 | } | |
497b47a8 | 2678 | #ifdef DEBUGGING |
a0d0e21e | 2679 | if (!notfound) { |
497b47a8 | 2680 | DEBUG_o(Perl_deb(aTHX_ |
a0288114 | 2681 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
497b47a8 JH |
2682 | AMG_id2name(off), |
2683 | method+assignshift==off? "" : | |
a0288114 | 2684 | " (initially \"", |
497b47a8 JH |
2685 | method+assignshift==off? "" : |
2686 | AMG_id2name(method+assignshift), | |
a0288114 | 2687 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
2688 | flags & AMGf_unary? "" : |
2689 | lr==1 ? " for right argument": " for left argument", | |
2690 | flags & AMGf_unary? " for argument" : "", | |
bfcb3514 | 2691 | stash ? HvNAME_get(stash) : "null", |
497b47a8 | 2692 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 2693 | } |
497b47a8 | 2694 | #endif |
748a9306 LW |
2695 | /* Since we use shallow copy during assignment, we need |
2696 | * to dublicate the contents, probably calling user-supplied | |
2697 | * version of copy operator | |
2698 | */ | |
ee239bfe IZ |
2699 | /* We need to copy in following cases: |
2700 | * a) Assignment form was called. | |
2701 | * assignshift==1, assign==T, method + 1 == off | |
2702 | * b) Increment or decrement, called directly. | |
2703 | * assignshift==0, assign==0, method + 0 == off | |
2704 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 2705 | * assignshift==0, assign==T, |
ee239bfe IZ |
2706 | * force_cpy == T |
2707 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 2708 | * assignshift==0, assign==0, |
ee239bfe IZ |
2709 | * force_cpy == T |
2710 | * e) Assignment form translated to nomethod. | |
2711 | * assignshift==1, assign==T, method + 1 != off | |
2712 | * force_cpy == T | |
2713 | */ | |
2714 | /* off is method, method+assignshift, or a result of opcode substitution. | |
2715 | * In the latter case assignshift==0, so only notfound case is important. | |
2716 | */ | |
2717 | if (( (method + assignshift == off) | |
2718 | && (assign || (method == inc_amg) || (method == dec_amg))) | |
2719 | || force_cpy) | |
6f1401dc | 2720 | { |
1b38c28e NC |
2721 | /* newSVsv does not behave as advertised, so we copy missing |
2722 | * information by hand */ | |
2723 | SV *tmpRef = SvRV(left); | |
2724 | SV *rv_copy; | |
31d632c3 | 2725 | if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) { |
1b38c28e NC |
2726 | SvRV_set(left, rv_copy); |
2727 | SvSETMAGIC(left); | |
2728 | SvREFCNT_dec(tmpRef); | |
2729 | } | |
6f1401dc DM |
2730 | } |
2731 | ||
a0d0e21e LW |
2732 | { |
2733 | dSP; | |
2734 | BINOP myop; | |
2735 | SV* res; | |
b7787f18 | 2736 | const bool oldcatch = CATCH_GET; |
a0d0e21e | 2737 | |
54310121 | 2738 | CATCH_SET(TRUE); |
a0d0e21e LW |
2739 | Zero(&myop, 1, BINOP); |
2740 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 2741 | myop.op_next = NULL; |
54310121 | 2742 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e | 2743 | |
e788e7d3 | 2744 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 2745 | ENTER; |
462e5cf6 | 2746 | SAVEOP(); |
533c011a | 2747 | PL_op = (OP *) &myop; |
3280af22 | 2748 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 2749 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 2750 | PUTBACK; |
897d3989 | 2751 | Perl_pp_pushmark(aTHX); |
a0d0e21e | 2752 | |
924508f0 | 2753 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
2754 | PUSHs(lr>0? right: left); |
2755 | PUSHs(lr>0? left: right); | |
3280af22 | 2756 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 2757 | if (notfound) { |
59cd0e26 NC |
2758 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
2759 | AMG_id2namelen(method + assignshift), SVs_TEMP)); | |
a0d0e21e | 2760 | } |
ad64d0ec | 2761 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e LW |
2762 | PUTBACK; |
2763 | ||
139d0ce6 | 2764 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 | 2765 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
2766 | LEAVE; |
2767 | SPAGAIN; | |
2768 | ||
2769 | res=POPs; | |
ebafeae7 | 2770 | PUTBACK; |
d3acc0f7 | 2771 | POPSTACK; |
54310121 | 2772 | CATCH_SET(oldcatch); |
a0d0e21e | 2773 | |
a0d0e21e | 2774 | if (postpr) { |
b7787f18 | 2775 | int ans; |
a0d0e21e LW |
2776 | switch (method) { |
2777 | case le_amg: | |
2778 | case sle_amg: | |
2779 | ans=SvIV(res)<=0; break; | |
2780 | case lt_amg: | |
2781 | case slt_amg: | |
2782 | ans=SvIV(res)<0; break; | |
2783 | case ge_amg: | |
2784 | case sge_amg: | |
2785 | ans=SvIV(res)>=0; break; | |
2786 | case gt_amg: | |
2787 | case sgt_amg: | |
2788 | ans=SvIV(res)>0; break; | |
2789 | case eq_amg: | |
2790 | case seq_amg: | |
2791 | ans=SvIV(res)==0; break; | |
2792 | case ne_amg: | |
2793 | case sne_amg: | |
2794 | ans=SvIV(res)!=0; break; | |
2795 | case inc_amg: | |
2796 | case dec_amg: | |
bbce6d69 | 2797 | SvSetSV(left,res); return left; |
dc437b57 | 2798 | case not_amg: |
fe7ac86a | 2799 | ans=!SvTRUE(res); break; |
b7787f18 AL |
2800 | default: |
2801 | ans=0; break; | |
a0d0e21e | 2802 | } |
54310121 | 2803 | return boolSV(ans); |
748a9306 LW |
2804 | } else if (method==copy_amg) { |
2805 | if (!SvROK(res)) { | |
cea2e8a9 | 2806 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
2807 | } |
2808 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
2809 | } else { |
2810 | return res; | |
2811 | } | |
2812 | } | |
2813 | } | |
c9d5ac95 | 2814 | |
f5c1e807 NC |
2815 | void |
2816 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
2817 | { | |
2818 | dVAR; | |
acda4c6a | 2819 | U32 hash; |
f5c1e807 | 2820 | |
7918f24d | 2821 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 NC |
2822 | PERL_UNUSED_ARG(flags); |
2823 | ||
acda4c6a NC |
2824 | if (len > I32_MAX) |
2825 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); | |
2826 | ||
ae8cc45f NC |
2827 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
2828 | unshare_hek(GvNAME_HEK(gv)); | |
2829 | } | |
2830 | ||
acda4c6a | 2831 | PERL_HASH(hash, name, len); |
9f616d01 | 2832 | GvNAME_HEK(gv) = share_hek(name, len, hash); |
f5c1e807 NC |
2833 | } |
2834 | ||
66610fdd | 2835 | /* |
f7461760 Z |
2836 | =for apidoc gv_try_downgrade |
2837 | ||
2867cdbc Z |
2838 | If the typeglob C<gv> can be expressed more succinctly, by having |
2839 | something other than a real GV in its place in the stash, replace it | |
2840 | with the optimised form. Basic requirements for this are that C<gv> | |
2841 | is a real typeglob, is sufficiently ordinary, and is only referenced | |
2842 | from its package. This function is meant to be used when a GV has been | |
2843 | looked up in part to see what was there, causing upgrading, but based | |
2844 | on what was found it turns out that the real GV isn't required after all. | |
2845 | ||
2846 | If C<gv> is a completely empty typeglob, it is deleted from the stash. | |
2847 | ||
2848 | If C<gv> is a typeglob containing only a sufficiently-ordinary constant | |
2849 | sub, the typeglob is replaced with a scalar-reference placeholder that | |
2850 | more compactly represents the same thing. | |
f7461760 Z |
2851 | |
2852 | =cut | |
2853 | */ | |
2854 | ||
2855 | void | |
2856 | Perl_gv_try_downgrade(pTHX_ GV *gv) | |
2857 | { | |
2858 | HV *stash; | |
2859 | CV *cv; | |
2860 | HEK *namehek; | |
2861 | SV **gvp; | |
2862 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; | |
95f56751 FC |
2863 | |
2864 | /* XXX Why and where does this leave dangling pointers during global | |
2865 | destruction? */ | |
627364f1 | 2866 | if (PL_phase == PERL_PHASE_DESTRUCT) return; |
95f56751 | 2867 | |
2867cdbc | 2868 | if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
803f2748 | 2869 | !SvOBJECT(gv) && !SvREADONLY(gv) && |
f7461760 | 2870 | isGV_with_GP(gv) && GvGP(gv) && |
2867cdbc | 2871 | !GvINTRO(gv) && GvREFCNT(gv) == 1 && |
f7461760 | 2872 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && |
099be4f1 | 2873 | GvEGVx(gv) == gv && (stash = GvSTASH(gv)))) |
2867cdbc | 2874 | return; |
803f2748 DM |
2875 | if (SvMAGICAL(gv)) { |
2876 | MAGIC *mg; | |
2877 | /* only backref magic is allowed */ | |
2878 | if (SvGMAGICAL(gv) || SvSMAGICAL(gv)) | |
2879 | return; | |
2880 | for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) { | |
2881 | if (mg->mg_type != PERL_MAGIC_backref) | |
2882 | return; | |
2883 | } | |
2884 | } | |
2867cdbc Z |
2885 | cv = GvCV(gv); |
2886 | if (!cv) { | |
2887 | HEK *gvnhek = GvNAME_HEK(gv); | |
2888 | (void)hv_delete(stash, HEK_KEY(gvnhek), | |
2889 | HEK_UTF8(gvnhek) ? -HEK_LEN(gvnhek) : HEK_LEN(gvnhek), G_DISCARD); | |
2890 | } else if (GvMULTI(gv) && cv && | |
f7461760 Z |
2891 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
2892 | CvSTASH(cv) == stash && CvGV(cv) == gv && | |
2893 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && | |
2894 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && | |
2895 | (namehek = GvNAME_HEK(gv)) && | |
2896 | (gvp = hv_fetch(stash, HEK_KEY(namehek), | |
2897 | HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) && | |
2898 | *gvp == (SV*)gv) { | |
2899 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); | |
2900 | SvREFCNT(gv) = 0; | |
2901 | sv_clear((SV*)gv); | |
2902 | SvREFCNT(gv) = 1; | |
2903 | SvFLAGS(gv) = SVt_IV|SVf_ROK; | |
2904 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - | |
2905 | STRUCT_OFFSET(XPVIV, xiv_iv)); | |
2906 | SvRV_set(gv, value); | |
2907 | } | |
2908 | } | |
2909 | ||
4aaa4757 FC |
2910 | #include "XSUB.h" |
2911 | ||
2912 | static void | |
2913 | core_xsub(pTHX_ CV* cv) | |
2914 | { | |
2915 | Perl_croak(aTHX_ | |
2916 | "&CORE::%s cannot be called directly", GvNAME(CvGV(cv)) | |
2917 | ); | |
2918 | } | |
2919 | ||
f7461760 | 2920 | /* |
66610fdd RGS |
2921 | * Local variables: |
2922 | * c-indentation-style: bsd | |
2923 | * c-basic-offset: 4 | |
2924 | * indent-tabs-mode: t | |
2925 | * End: | |
2926 | * | |
37442d52 RGS |
2927 | * ex: set ts=8 sts=4 sw=4 noet: |
2928 | */ |