Commit | Line | Data |
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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" |
2846acbf | 40 | #include "feature.h" |
79072805 | 41 | |
f54cb97a AL |
42 | static const char S_autoload[] = "AUTOLOAD"; |
43 | static const STRLEN S_autolen = sizeof(S_autoload)-1; | |
5c7983e5 | 44 | |
c69033f2 | 45 | GV * |
d5713896 | 46 | Perl_gv_add_by_type(pTHX_ GV *gv, svtype type) |
c69033f2 | 47 | { |
d5713896 | 48 | SV **where; |
7918f24d | 49 | |
13be902c FC |
50 | if ( |
51 | !gv | |
52 | || ( | |
53 | SvTYPE((const SV *)gv) != SVt_PVGV | |
54 | && SvTYPE((const SV *)gv) != SVt_PVLV | |
55 | ) | |
56 | ) { | |
bb85b28a NC |
57 | const char *what; |
58 | if (type == SVt_PVIO) { | |
59 | /* | |
60 | * if it walks like a dirhandle, then let's assume that | |
61 | * this is a dirhandle. | |
62 | */ | |
332c2eac | 63 | what = OP_IS_DIRHOP(PL_op->op_type) ? |
bb85b28a | 64 | "dirhandle" : "filehandle"; |
bb85b28a NC |
65 | } else if (type == SVt_PVHV) { |
66 | what = "hash"; | |
67 | } else { | |
68 | what = type == SVt_PVAV ? "array" : "scalar"; | |
69 | } | |
de6f7947 | 70 | /* diag_listed_as: Bad symbol for filehandle */ |
bb85b28a NC |
71 | Perl_croak(aTHX_ "Bad symbol for %s", what); |
72 | } | |
d5713896 NC |
73 | |
74 | if (type == SVt_PVHV) { | |
75 | where = (SV **)&GvHV(gv); | |
76 | } else if (type == SVt_PVAV) { | |
77 | where = (SV **)&GvAV(gv); | |
bb85b28a NC |
78 | } else if (type == SVt_PVIO) { |
79 | where = (SV **)&GvIOp(gv); | |
d5713896 NC |
80 | } else { |
81 | where = &GvSV(gv); | |
82 | } | |
7918f24d | 83 | |
d5713896 NC |
84 | if (!*where) |
85 | *where = newSV_type(type); | |
986d39ee FC |
86 | if (type == SVt_PVAV && GvNAMELEN(gv) == 3 |
87 | && strnEQ(GvNAME(gv), "ISA", 3)) | |
88 | sv_magic(*where, (SV *)gv, PERL_MAGIC_isa, NULL, 0); | |
79072805 LW |
89 | return gv; |
90 | } | |
91 | ||
92 | GV * | |
864dbfa3 | 93 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 94 | { |
7918f24d | 95 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec NC |
96 | return gv_fetchfile_flags(name, strlen(name), 0); |
97 | } | |
98 | ||
99 | GV * | |
100 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
101 | const U32 flags) | |
102 | { | |
97aff369 | 103 | dVAR; |
4116122e | 104 | char smallbuf[128]; |
53d95988 | 105 | char *tmpbuf; |
d9095cec | 106 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
107 | GV *gv; |
108 | ||
7918f24d | 109 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec NC |
110 | PERL_UNUSED_ARG(flags); |
111 | ||
1d7c1841 | 112 | if (!PL_defstash) |
a0714e2c | 113 | return NULL; |
1d7c1841 | 114 | |
d9095cec | 115 | if (tmplen <= sizeof smallbuf) |
53d95988 CS |
116 | tmpbuf = smallbuf; |
117 | else | |
798b63bc | 118 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 119 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
120 | tmpbuf[0] = '_'; |
121 | tmpbuf[1] = '<'; | |
d9095cec NC |
122 | memcpy(tmpbuf + 2, name, namelen); |
123 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); | |
1d7c1841 | 124 | if (!isGV(gv)) { |
d9095cec | 125 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 | 126 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec | 127 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 128 | #else |
d9095cec | 129 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 130 | #endif |
1d7c1841 | 131 | } |
5a9a79a4 FC |
132 | if ((PERLDB_LINE || PERLDB_SAVESRC) && !GvAV(gv)) |
133 | hv_magic(GvHVn(gv_AVadd(gv)), NULL, PERL_MAGIC_dbfile); | |
53d95988 CS |
134 | if (tmpbuf != smallbuf) |
135 | Safefree(tmpbuf); | |
79072805 LW |
136 | return gv; |
137 | } | |
138 | ||
62d55b22 NC |
139 | /* |
140 | =for apidoc gv_const_sv | |
141 | ||
142 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
143 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
144 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
145 | NULL. | |
146 | ||
147 | =cut | |
148 | */ | |
149 | ||
150 | SV * | |
151 | Perl_gv_const_sv(pTHX_ GV *gv) | |
152 | { | |
7918f24d NC |
153 | PERL_ARGS_ASSERT_GV_CONST_SV; |
154 | ||
62d55b22 NC |
155 | if (SvTYPE(gv) == SVt_PVGV) |
156 | return cv_const_sv(GvCVu(gv)); | |
6f1b3ab0 | 157 | return SvROK(gv) && SvTYPE(SvRV(gv)) != SVt_PVAV ? SvRV(gv) : NULL; |
62d55b22 NC |
158 | } |
159 | ||
12816592 NC |
160 | GP * |
161 | Perl_newGP(pTHX_ GV *const gv) | |
162 | { | |
163 | GP *gp; | |
19bad673 | 164 | U32 hash; |
19bad673 NC |
165 | const char *file; |
166 | STRLEN len; | |
2639089b | 167 | #ifndef USE_ITHREADS |
6b352265 | 168 | GV *filegv; |
2639089b | 169 | #endif |
c2587955 | 170 | dVAR; |
19bad673 | 171 | |
7918f24d | 172 | PERL_ARGS_ASSERT_NEWGP; |
2639089b DD |
173 | Newxz(gp, 1, GP); |
174 | gp->gp_egv = gv; /* allow compiler to reuse gv after this */ | |
175 | #ifndef PERL_DONT_CREATE_GVSV | |
176 | gp->gp_sv = newSV(0); | |
177 | #endif | |
7918f24d | 178 | |
f5d98eaa FC |
179 | /* PL_curcop should never be null here. */ |
180 | assert(PL_curcop); | |
181 | /* But for non-debugging builds play it safe */ | |
2639089b DD |
182 | if (PL_curcop) { |
183 | gp->gp_line = CopLINE(PL_curcop); /* 0 otherwise Newxz */ | |
6e314d4f | 184 | #ifdef USE_ITHREADS |
2639089b DD |
185 | if (CopFILE(PL_curcop)) { |
186 | file = CopFILE(PL_curcop); | |
187 | len = strlen(file); | |
188 | } | |
2639089b | 189 | #else |
cb0d3385 FC |
190 | filegv = CopFILEGV(PL_curcop); |
191 | if (filegv) { | |
192 | file = GvNAME(filegv)+2; | |
193 | len = GvNAMELEN(filegv)-2; | |
194 | } | |
6e314d4f | 195 | #endif |
cb0d3385 FC |
196 | else goto no_file; |
197 | } | |
198 | else { | |
199 | no_file: | |
19bad673 NC |
200 | file = ""; |
201 | len = 0; | |
202 | } | |
f4890806 NC |
203 | |
204 | PERL_HASH(hash, file, len); | |
f4890806 | 205 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
206 | gp->gp_refcnt = 1; |
207 | ||
208 | return gp; | |
209 | } | |
210 | ||
803f2748 DM |
211 | /* Assign CvGV(cv) = gv, handling weak references. |
212 | * See also S_anonymise_cv_maybe */ | |
213 | ||
214 | void | |
215 | Perl_cvgv_set(pTHX_ CV* cv, GV* gv) | |
216 | { | |
217 | GV * const oldgv = CvGV(cv); | |
b290562e | 218 | HEK *hek; |
803f2748 DM |
219 | PERL_ARGS_ASSERT_CVGV_SET; |
220 | ||
221 | if (oldgv == gv) | |
222 | return; | |
223 | ||
224 | if (oldgv) { | |
cfc1e951 | 225 | if (CvCVGV_RC(cv)) { |
e7881358 | 226 | SvREFCNT_dec_NN(oldgv); |
cfc1e951 DM |
227 | CvCVGV_RC_off(cv); |
228 | } | |
803f2748 | 229 | else { |
803f2748 DM |
230 | sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv)); |
231 | } | |
232 | } | |
b290562e | 233 | else if ((hek = CvNAME_HEK(cv))) unshare_hek(hek); |
803f2748 | 234 | |
b290562e | 235 | SvANY(cv)->xcv_gv_u.xcv_gv = gv; |
c794ca97 | 236 | assert(!CvCVGV_RC(cv)); |
803f2748 DM |
237 | |
238 | if (!gv) | |
239 | return; | |
240 | ||
c794ca97 DM |
241 | if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv)) |
242 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv)); | |
243 | else { | |
cfc1e951 | 244 | CvCVGV_RC_on(cv); |
803f2748 DM |
245 | SvREFCNT_inc_simple_void_NN(gv); |
246 | } | |
803f2748 DM |
247 | } |
248 | ||
c68d9564 Z |
249 | /* Assign CvSTASH(cv) = st, handling weak references. */ |
250 | ||
251 | void | |
252 | Perl_cvstash_set(pTHX_ CV *cv, HV *st) | |
253 | { | |
254 | HV *oldst = CvSTASH(cv); | |
255 | PERL_ARGS_ASSERT_CVSTASH_SET; | |
256 | if (oldst == st) | |
257 | return; | |
258 | if (oldst) | |
259 | sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv)); | |
260 | SvANY(cv)->xcv_stash = st; | |
261 | if (st) | |
262 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv)); | |
263 | } | |
803f2748 | 264 | |
e1104062 FC |
265 | /* |
266 | =for apidoc gv_init_pvn | |
267 | ||
268 | Converts a scalar into a typeglob. This is an incoercible typeglob; | |
269 | assigning a reference to it will assign to one of its slots, instead of | |
270 | overwriting it as happens with typeglobs created by SvSetSV. Converting | |
271 | any scalar that is SvOK() may produce unpredictable results and is reserved | |
272 | for perl's internal use. | |
273 | ||
274 | C<gv> is the scalar to be converted. | |
275 | ||
276 | C<stash> is the parent stash/package, if any. | |
277 | ||
04ec7e59 FC |
278 | C<name> and C<len> give the name. The name must be unqualified; |
279 | that is, it must not include the package name. If C<gv> is a | |
e1104062 FC |
280 | stash element, it is the caller's responsibility to ensure that the name |
281 | passed to this function matches the name of the element. If it does not | |
282 | match, perl's internal bookkeeping will get out of sync. | |
283 | ||
04ec7e59 FC |
284 | C<flags> can be set to SVf_UTF8 if C<name> is a UTF8 string, or |
285 | the return value of SvUTF8(sv). It can also take the | |
286 | GV_ADDMULTI flag, which means to pretend that the GV has been | |
e1104062 FC |
287 | seen before (i.e., suppress "Used once" warnings). |
288 | ||
289 | =for apidoc gv_init | |
290 | ||
291 | The old form of gv_init_pvn(). It does not work with UTF8 strings, as it | |
04ec7e59 FC |
292 | has no flags parameter. If the C<multi> parameter is set, the |
293 | GV_ADDMULTI flag will be passed to gv_init_pvn(). | |
e1104062 FC |
294 | |
295 | =for apidoc gv_init_pv | |
296 | ||
297 | Same as gv_init_pvn(), but takes a nul-terminated string for the name | |
298 | instead of separate char * and length parameters. | |
299 | ||
300 | =for apidoc gv_init_sv | |
301 | ||
302 | Same as gv_init_pvn(), but takes an SV * for the name instead of separate | |
303 | char * and length parameters. C<flags> is currently unused. | |
304 | ||
305 | =cut | |
306 | */ | |
307 | ||
463ee0b2 | 308 | void |
04ec7e59 | 309 | Perl_gv_init_sv(pTHX_ GV *gv, HV *stash, SV* namesv, U32 flags) |
e6066781 BF |
310 | { |
311 | char *namepv; | |
312 | STRLEN namelen; | |
313 | PERL_ARGS_ASSERT_GV_INIT_SV; | |
314 | namepv = SvPV(namesv, namelen); | |
315 | if (SvUTF8(namesv)) | |
316 | flags |= SVf_UTF8; | |
04ec7e59 | 317 | gv_init_pvn(gv, stash, namepv, namelen, flags); |
e6066781 BF |
318 | } |
319 | ||
320 | void | |
04ec7e59 | 321 | Perl_gv_init_pv(pTHX_ GV *gv, HV *stash, const char *name, U32 flags) |
e6066781 BF |
322 | { |
323 | PERL_ARGS_ASSERT_GV_INIT_PV; | |
04ec7e59 | 324 | gv_init_pvn(gv, stash, name, strlen(name), flags); |
e6066781 BF |
325 | } |
326 | ||
327 | void | |
04ec7e59 | 328 | Perl_gv_init_pvn(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, U32 flags) |
463ee0b2 | 329 | { |
27da23d5 | 330 | dVAR; |
3b6733bf NC |
331 | const U32 old_type = SvTYPE(gv); |
332 | const bool doproto = old_type > SVt_NULL; | |
f9509170 | 333 | char * const proto = (doproto && SvPOK(gv)) |
dad95a0a | 334 | ? ((void)(SvIsCOW(gv) && (sv_force_normal((SV *)gv), 0)), SvPVX(gv)) |
f9509170 | 335 | : NULL; |
49a54bbe | 336 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
e0260a5b | 337 | const U32 proto_utf8 = proto ? SvUTF8(gv) : 0; |
756cb477 | 338 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 339 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 | 340 | |
e6066781 | 341 | PERL_ARGS_ASSERT_GV_INIT_PVN; |
756cb477 NC |
342 | assert (!(proto && has_constant)); |
343 | ||
344 | if (has_constant) { | |
5c1f4d79 NC |
345 | /* The constant has to be a simple scalar type. */ |
346 | switch (SvTYPE(has_constant)) { | |
5c1f4d79 NC |
347 | case SVt_PVHV: |
348 | case SVt_PVCV: | |
349 | case SVt_PVFM: | |
350 | case SVt_PVIO: | |
351 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
352 | sv_reftype(has_constant, 0)); | |
42d0e0b7 | 353 | default: NOOP; |
5c1f4d79 | 354 | } |
756cb477 NC |
355 | SvRV_set(gv, NULL); |
356 | SvROK_off(gv); | |
357 | } | |
463ee0b2 | 358 | |
3b6733bf NC |
359 | |
360 | if (old_type < SVt_PVGV) { | |
361 | if (old_type >= SVt_PV) | |
362 | SvCUR_set(gv, 0); | |
ad64d0ec | 363 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); |
3b6733bf | 364 | } |
55d729e4 GS |
365 | if (SvLEN(gv)) { |
366 | if (proto) { | |
f880fe2f | 367 | SvPV_set(gv, NULL); |
b162af07 | 368 | SvLEN_set(gv, 0); |
55d729e4 GS |
369 | SvPOK_off(gv); |
370 | } else | |
94010e71 | 371 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 372 | } |
2e5b91de NC |
373 | SvIOK_off(gv); |
374 | isGV_with_GP_on(gv); | |
12816592 | 375 | |
c43ae56f | 376 | GvGP_set(gv, Perl_newGP(aTHX_ gv)); |
e15faf7d NC |
377 | GvSTASH(gv) = stash; |
378 | if (stash) | |
ad64d0ec | 379 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
04f3bf56 | 380 | gv_name_set(gv, name, len, GV_ADD | ( flags & SVf_UTF8 ? SVf_UTF8 : 0 )); |
04ec7e59 FC |
381 | if (flags & GV_ADDMULTI || doproto) /* doproto means it */ |
382 | GvMULTI_on(gv); /* _was_ mentioned */ | |
186a5ba8 | 383 | if (doproto) { |
e3d2b9e7 | 384 | CV *cv; |
756cb477 NC |
385 | if (has_constant) { |
386 | /* newCONSTSUB takes ownership of the reference from us. */ | |
e38acfd7 | 387 | cv = newCONSTSUB_flags(stash, name, len, flags, has_constant); |
75bd28cf FC |
388 | /* In case op.c:S_process_special_blocks stole it: */ |
389 | if (!GvCV(gv)) | |
c43ae56f | 390 | GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv)); |
439cdf38 | 391 | assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */ |
1ccdb730 NC |
392 | /* If this reference was a copy of another, then the subroutine |
393 | must have been "imported", by a Perl space assignment to a GV | |
394 | from a reference to CV. */ | |
395 | if (exported_constant) | |
396 | GvIMPORTED_CV_on(gv); | |
186a5ba8 | 397 | CvSTASH_set(cv, PL_curstash); /* XXX Why is this needed? */ |
756cb477 | 398 | } else { |
186a5ba8 | 399 | cv = newSTUB(gv,1); |
756cb477 | 400 | } |
55d729e4 | 401 | if (proto) { |
e3d2b9e7 | 402 | sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen, |
49a54bbe | 403 | SV_HAS_TRAILING_NUL); |
e0260a5b | 404 | if ( proto_utf8 ) SvUTF8_on(MUTABLE_SV(cv)); |
55d729e4 GS |
405 | } |
406 | } | |
463ee0b2 LW |
407 | } |
408 | ||
76e3520e | 409 | STATIC void |
e6066781 | 410 | S_gv_init_svtype(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 411 | { |
e6066781 | 412 | PERL_ARGS_ASSERT_GV_INIT_SVTYPE; |
7918f24d | 413 | |
a0d0e21e LW |
414 | switch (sv_type) { |
415 | case SVt_PVIO: | |
416 | (void)GvIOn(gv); | |
417 | break; | |
418 | case SVt_PVAV: | |
419 | (void)GvAVn(gv); | |
420 | break; | |
421 | case SVt_PVHV: | |
422 | (void)GvHVn(gv); | |
423 | break; | |
c69033f2 NC |
424 | #ifdef PERL_DONT_CREATE_GVSV |
425 | case SVt_NULL: | |
426 | case SVt_PVCV: | |
427 | case SVt_PVFM: | |
e654831b | 428 | case SVt_PVGV: |
c69033f2 NC |
429 | break; |
430 | default: | |
dbdce04c NC |
431 | if(GvSVn(gv)) { |
432 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
433 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
434 | its side effect */ | |
435 | } | |
c69033f2 | 436 | #endif |
a0d0e21e LW |
437 | } |
438 | } | |
439 | ||
0f8d4b5e FC |
440 | static void core_xsub(pTHX_ CV* cv); |
441 | ||
442 | static GV * | |
443 | S_maybe_add_coresub(pTHX_ HV * const stash, GV *gv, | |
87566176 | 444 | const char * const name, const STRLEN len) |
0f8d4b5e FC |
445 | { |
446 | const int code = keyword(name, len, 1); | |
447 | static const char file[] = __FILE__; | |
97021f77 | 448 | CV *cv, *oldcompcv = NULL; |
0f8d4b5e | 449 | int opnum = 0; |
0f8d4b5e | 450 | bool ampable = TRUE; /* &{}-able */ |
97021f77 FC |
451 | COP *oldcurcop = NULL; |
452 | yy_parser *oldparser = NULL; | |
453 | I32 oldsavestack_ix = 0; | |
0f8d4b5e FC |
454 | |
455 | assert(gv || stash); | |
456 | assert(name); | |
0f8d4b5e | 457 | |
88b892d8 FC |
458 | if (!code) return NULL; /* Not a keyword */ |
459 | switch (code < 0 ? -code : code) { | |
0f8d4b5e | 460 | /* no support for \&CORE::infix; |
d885f758 | 461 | no support for funcs that do not parse like funcs */ |
88b892d8 FC |
462 | case KEY___DATA__: case KEY___END__: case KEY_and: case KEY_AUTOLOAD: |
463 | case KEY_BEGIN : case KEY_CHECK : case KEY_cmp: case KEY_CORE : | |
eb31eb35 | 464 | case KEY_default : case KEY_DESTROY: |
88b892d8 | 465 | case KEY_do : case KEY_dump : case KEY_else : case KEY_elsif : |
d51f8b19 | 466 | case KEY_END : case KEY_eq : case KEY_eval : |
88b892d8 | 467 | case KEY_for : case KEY_foreach: case KEY_format: case KEY_ge : |
498a02d8 | 468 | case KEY_given : case KEY_goto : case KEY_grep : |
88b892d8 FC |
469 | case KEY_gt : case KEY_if: case KEY_INIT: case KEY_last: case KEY_le: |
470 | case KEY_local: case KEY_lt: case KEY_m : case KEY_map : case KEY_my: | |
471 | case KEY_ne : case KEY_next : case KEY_no: case KEY_or: case KEY_our: | |
1efec5ed | 472 | case KEY_package: case KEY_print: case KEY_printf: |
919ad5f7 | 473 | case KEY_q : case KEY_qq : case KEY_qr : case KEY_qw : |
88b892d8 | 474 | case KEY_qx : case KEY_redo : case KEY_require: case KEY_return: |
d33bb3da | 475 | case KEY_s : case KEY_say : case KEY_sort : |
d80ed303 | 476 | case KEY_state: case KEY_sub : |
46bef06f | 477 | case KEY_tr : case KEY_UNITCHECK: case KEY_unless: |
88b892d8 FC |
478 | case KEY_until: case KEY_use : case KEY_when : case KEY_while : |
479 | case KEY_x : case KEY_xor : case KEY_y : | |
0f8d4b5e FC |
480 | return NULL; |
481 | case KEY_chdir: | |
eb31eb35 | 482 | case KEY_chomp: case KEY_chop: case KEY_defined: case KEY_delete: |
d51f8b19 | 483 | case KEY_each : case KEY_eof : case KEY_exec : case KEY_exists: |
0f8d4b5e FC |
484 | case KEY_keys: |
485 | case KEY_lstat: | |
486 | case KEY_pop: | |
487 | case KEY_push: | |
488 | case KEY_shift: | |
a99f2ca2 | 489 | case KEY_splice: case KEY_split: |
0f8d4b5e FC |
490 | case KEY_stat: |
491 | case KEY_system: | |
492 | case KEY_truncate: case KEY_unlink: | |
493 | case KEY_unshift: | |
494 | case KEY_values: | |
495 | ampable = FALSE; | |
496 | } | |
497 | if (!gv) { | |
498 | gv = (GV *)newSV(0); | |
499 | gv_init(gv, stash, name, len, TRUE); | |
500 | } | |
7e68c38b | 501 | GvMULTI_on(gv); |
0f8d4b5e FC |
502 | if (ampable) { |
503 | ENTER; | |
504 | oldcurcop = PL_curcop; | |
505 | oldparser = PL_parser; | |
506 | lex_start(NULL, NULL, 0); | |
507 | oldcompcv = PL_compcv; | |
508 | PL_compcv = NULL; /* Prevent start_subparse from setting | |
509 | CvOUTSIDE. */ | |
510 | oldsavestack_ix = start_subparse(FALSE,0); | |
511 | cv = PL_compcv; | |
512 | } | |
513 | else { | |
514 | /* Avoid calling newXS, as it calls us, and things start to | |
515 | get hairy. */ | |
516 | cv = MUTABLE_CV(newSV_type(SVt_PVCV)); | |
517 | GvCV_set(gv,cv); | |
518 | GvCVGEN(gv) = 0; | |
519 | mro_method_changed_in(GvSTASH(gv)); | |
520 | CvISXSUB_on(cv); | |
521 | CvXSUB(cv) = core_xsub; | |
522 | } | |
523 | CvGV_set(cv, gv); /* This stops new ATTRSUB from setting CvFILE | |
524 | from PL_curcop. */ | |
525 | (void)gv_fetchfile(file); | |
526 | CvFILE(cv) = (char *)file; | |
527 | /* XXX This is inefficient, as doing things this order causes | |
528 | a prototype check in newATTRSUB. But we have to do | |
529 | it this order as we need an op number before calling | |
530 | new ATTRSUB. */ | |
531 | (void)core_prototype((SV *)cv, name, code, &opnum); | |
87566176 | 532 | if (stash) |
73c02f15 | 533 | (void)hv_store(stash,name,len,(SV *)gv,0); |
0f8d4b5e | 534 | if (ampable) { |
4428fb0e TC |
535 | #ifdef DEBUGGING |
536 | CV *orig_cv = cv; | |
537 | #endif | |
0f8d4b5e | 538 | CvLVALUE_on(cv); |
4428fb0e TC |
539 | /* newATTRSUB will free the CV and return NULL if we're still |
540 | compiling after a syntax error */ | |
541 | if ((cv = newATTRSUB_flags( | |
7e68c38b | 542 | oldsavestack_ix, (OP *)gv, |
0f8d4b5e FC |
543 | NULL,NULL, |
544 | coresub_op( | |
545 | opnum | |
546 | ? newSVuv((UV)opnum) | |
547 | : newSVpvn(name,len), | |
548 | code, opnum | |
7e68c38b FC |
549 | ), |
550 | 1 | |
4428fb0e TC |
551 | )) != NULL) { |
552 | assert(GvCV(gv) == orig_cv); | |
553 | if (opnum != OP_VEC && opnum != OP_SUBSTR && opnum != OP_POS | |
554 | && opnum != OP_UNDEF) | |
555 | CvLVALUE_off(cv); /* Now *that* was a neat trick. */ | |
556 | } | |
0f8d4b5e FC |
557 | LEAVE; |
558 | PL_parser = oldparser; | |
559 | PL_curcop = oldcurcop; | |
560 | PL_compcv = oldcompcv; | |
561 | } | |
4428fb0e TC |
562 | if (cv) { |
563 | SV *opnumsv = opnum ? newSVuv((UV)opnum) : (SV *)NULL; | |
564 | cv_set_call_checker( | |
565 | cv, Perl_ck_entersub_args_core, opnumsv ? opnumsv : (SV *)cv | |
566 | ); | |
567 | SvREFCNT_dec(opnumsv); | |
568 | } | |
569 | ||
0f8d4b5e FC |
570 | return gv; |
571 | } | |
572 | ||
954c1994 | 573 | /* |
6c53d59b FC |
574 | =for apidoc gv_fetchmeth |
575 | ||
576 | Like L</gv_fetchmeth_pvn>, but lacks a flags parameter. | |
577 | ||
e6919483 BF |
578 | =for apidoc gv_fetchmeth_sv |
579 | ||
580 | Exactly like L</gv_fetchmeth_pvn>, but takes the name string in the form | |
581 | of an SV instead of a string/length pair. | |
582 | ||
583 | =cut | |
584 | */ | |
585 | ||
586 | GV * | |
587 | Perl_gv_fetchmeth_sv(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
588 | { | |
589 | char *namepv; | |
590 | STRLEN namelen; | |
591 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV; | |
592 | namepv = SvPV(namesv, namelen); | |
593 | if (SvUTF8(namesv)) | |
594 | flags |= SVf_UTF8; | |
595 | return gv_fetchmeth_pvn(stash, namepv, namelen, level, flags); | |
596 | } | |
597 | ||
598 | /* | |
599 | =for apidoc gv_fetchmeth_pv | |
600 | ||
601 | Exactly like L</gv_fetchmeth_pvn>, but takes a nul-terminated string | |
602 | instead of a string/length pair. | |
603 | ||
604 | =cut | |
605 | */ | |
606 | ||
607 | GV * | |
608 | Perl_gv_fetchmeth_pv(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
609 | { | |
610 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV; | |
611 | return gv_fetchmeth_pvn(stash, name, strlen(name), level, flags); | |
612 | } | |
613 | ||
614 | /* | |
615 | =for apidoc gv_fetchmeth_pvn | |
954c1994 GS |
616 | |
617 | Returns the glob with the given C<name> and a defined subroutine or | |
618 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
07766739 | 619 | accessible via @ISA and UNIVERSAL::. |
954c1994 GS |
620 | |
621 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
622 | side-effect creates a glob with the given C<name> in the given C<stash> | |
623 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 624 | up caching info for this glob. |
954c1994 | 625 | |
aae43805 FC |
626 | The only significant values for C<flags> are GV_SUPER and SVf_UTF8. |
627 | ||
628 | GV_SUPER indicates that we want to look up the method in the superclasses | |
629 | of the C<stash>. | |
e6919483 | 630 | |
aae43805 | 631 | The |
954c1994 | 632 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b | 633 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 634 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 635 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
636 | |
637 | =cut | |
638 | */ | |
639 | ||
e1a479c5 BB |
640 | /* NOTE: No support for tied ISA */ |
641 | ||
79072805 | 642 | GV * |
e6919483 | 643 | Perl_gv_fetchmeth_pvn(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) |
79072805 | 644 | { |
97aff369 | 645 | dVAR; |
463ee0b2 | 646 | GV** gvp; |
e1a479c5 BB |
647 | AV* linear_av; |
648 | SV** linear_svp; | |
649 | SV* linear_sv; | |
aae43805 | 650 | HV* cstash, *cachestash; |
e1a479c5 BB |
651 | GV* candidate = NULL; |
652 | CV* cand_cv = NULL; | |
e1a479c5 | 653 | GV* topgv = NULL; |
bfcb3514 | 654 | const char *hvname; |
e1a479c5 BB |
655 | I32 create = (level >= 0) ? 1 : 0; |
656 | I32 items; | |
e1a479c5 | 657 | U32 topgen_cmp; |
04f3bf56 | 658 | U32 is_utf8 = flags & SVf_UTF8; |
a0d0e21e | 659 | |
e6919483 | 660 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN; |
7918f24d | 661 | |
af09ea45 IK |
662 | /* UNIVERSAL methods should be callable without a stash */ |
663 | if (!stash) { | |
e1a479c5 | 664 | create = 0; /* probably appropriate */ |
da51bb9b | 665 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
666 | return 0; |
667 | } | |
668 | ||
e1a479c5 BB |
669 | assert(stash); |
670 | ||
bfcb3514 NC |
671 | hvname = HvNAME_get(stash); |
672 | if (!hvname) | |
e1a479c5 | 673 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 674 | |
e1a479c5 BB |
675 | assert(hvname); |
676 | assert(name); | |
463ee0b2 | 677 | |
aae43805 FC |
678 | DEBUG_o( Perl_deb(aTHX_ "Looking for %smethod %s in package %s\n", |
679 | flags & GV_SUPER ? "SUPER " : "",name,hvname) ); | |
44a8e56a | 680 | |
dd69841b | 681 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 | 682 | |
aae43805 | 683 | if (flags & GV_SUPER) { |
1a33a059 FC |
684 | if (!HvAUX(stash)->xhv_mro_meta->super) |
685 | HvAUX(stash)->xhv_mro_meta->super = newHV(); | |
686 | cachestash = HvAUX(stash)->xhv_mro_meta->super; | |
aae43805 FC |
687 | } |
688 | else cachestash = stash; | |
689 | ||
e1a479c5 | 690 | /* check locally for a real method or a cache entry */ |
aae43805 FC |
691 | gvp = (GV**)hv_fetch(cachestash, name, is_utf8 ? -(I32)len : (I32)len, |
692 | create); | |
e1a479c5 BB |
693 | if(gvp) { |
694 | topgv = *gvp; | |
0f8d4b5e | 695 | have_gv: |
e1a479c5 BB |
696 | assert(topgv); |
697 | if (SvTYPE(topgv) != SVt_PVGV) | |
04ec7e59 | 698 | gv_init_pvn(topgv, stash, name, len, GV_ADDMULTI|is_utf8); |
e1a479c5 BB |
699 | if ((cand_cv = GvCV(topgv))) { |
700 | /* If genuine method or valid cache entry, use it */ | |
701 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
702 | return topgv; | |
703 | } | |
704 | else { | |
705 | /* stale cache entry, junk it and move on */ | |
e7881358 | 706 | SvREFCNT_dec_NN(cand_cv); |
c43ae56f DM |
707 | GvCV_set(topgv, NULL); |
708 | cand_cv = NULL; | |
e1a479c5 BB |
709 | GvCVGEN(topgv) = 0; |
710 | } | |
711 | } | |
712 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
713 | /* cache indicates no such method definitively */ | |
714 | return 0; | |
715 | } | |
aae43805 FC |
716 | else if (stash == cachestash |
717 | && len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4 | |
0f8d4b5e | 718 | && strnEQ(hvname, "CORE", 4) |
87566176 | 719 | && S_maybe_add_coresub(aTHX_ NULL,topgv,name,len)) |
0f8d4b5e | 720 | goto have_gv; |
463ee0b2 | 721 | } |
79072805 | 722 | |
aae43805 | 723 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ |
e1a479c5 BB |
724 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
725 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
726 | while (items--) { | |
727 | linear_sv = *linear_svp++; | |
728 | assert(linear_sv); | |
729 | cstash = gv_stashsv(linear_sv, 0); | |
730 | ||
dd69841b | 731 | if (!cstash) { |
ecad31f0 | 732 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), |
d0c0e7dd | 733 | "Can't locate package %"SVf" for @%"HEKf"::ISA", |
ecad31f0 | 734 | SVfARG(linear_sv), |
d0c0e7dd | 735 | HEKfARG(HvNAME_HEK(stash))); |
e1a479c5 BB |
736 | continue; |
737 | } | |
9607fc9c | 738 | |
e1a479c5 BB |
739 | assert(cstash); |
740 | ||
c60dbbc3 | 741 | gvp = (GV**)hv_fetch(cstash, name, is_utf8 ? -(I32)len : (I32)len, 0); |
0f8d4b5e FC |
742 | if (!gvp) { |
743 | if (len > 1 && HvNAMELEN_get(cstash) == 4) { | |
744 | const char *hvname = HvNAME(cstash); assert(hvname); | |
745 | if (strnEQ(hvname, "CORE", 4) | |
746 | && (candidate = | |
87566176 | 747 | S_maybe_add_coresub(aTHX_ cstash,NULL,name,len) |
0f8d4b5e FC |
748 | )) |
749 | goto have_candidate; | |
750 | } | |
751 | continue; | |
752 | } | |
753 | else candidate = *gvp; | |
754 | have_candidate: | |
e1a479c5 | 755 | assert(candidate); |
04f3bf56 | 756 | if (SvTYPE(candidate) != SVt_PVGV) |
04ec7e59 | 757 | gv_init_pvn(candidate, cstash, name, len, GV_ADDMULTI|is_utf8); |
e1a479c5 BB |
758 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { |
759 | /* | |
760 | * Found real method, cache method in topgv if: | |
761 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
762 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
763 | */ | |
764 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
765 | CV *old_cv = GvCV(topgv); |
766 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 767 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 768 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
769 | GvCVGEN(topgv) = topgen_cmp; |
770 | } | |
771 | return candidate; | |
772 | } | |
773 | } | |
9607fc9c | 774 | |
e1a479c5 BB |
775 | /* Check UNIVERSAL without caching */ |
776 | if(level == 0 || level == -1) { | |
aae43805 | 777 | candidate = gv_fetchmeth_pvn(NULL, name, len, 1, flags &~GV_SUPER); |
e1a479c5 BB |
778 | if(candidate) { |
779 | cand_cv = GvCV(candidate); | |
780 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
781 | CV *old_cv = GvCV(topgv); |
782 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 783 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 784 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
785 | GvCVGEN(topgv) = topgen_cmp; |
786 | } | |
787 | return candidate; | |
788 | } | |
789 | } | |
790 | ||
791 | if (topgv && GvREFCNT(topgv) == 1) { | |
792 | /* cache the fact that the method is not defined */ | |
793 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
794 | } |
795 | ||
79072805 LW |
796 | return 0; |
797 | } | |
798 | ||
954c1994 | 799 | /* |
460e5730 FC |
800 | =for apidoc gv_fetchmeth_autoload |
801 | ||
802 | This is the old form of L</gv_fetchmeth_pvn_autoload>, which has no flags | |
803 | parameter. | |
804 | ||
d21989ed | 805 | =for apidoc gv_fetchmeth_sv_autoload |
611c1e95 | 806 | |
d21989ed BF |
807 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes the name string in the form |
808 | of an SV instead of a string/length pair. | |
809 | ||
810 | =cut | |
811 | */ | |
812 | ||
813 | GV * | |
814 | Perl_gv_fetchmeth_sv_autoload(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
815 | { | |
816 | char *namepv; | |
817 | STRLEN namelen; | |
818 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV_AUTOLOAD; | |
819 | namepv = SvPV(namesv, namelen); | |
820 | if (SvUTF8(namesv)) | |
821 | flags |= SVf_UTF8; | |
822 | return gv_fetchmeth_pvn_autoload(stash, namepv, namelen, level, flags); | |
823 | } | |
824 | ||
825 | /* | |
826 | =for apidoc gv_fetchmeth_pv_autoload | |
827 | ||
828 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes a nul-terminated string | |
829 | instead of a string/length pair. | |
830 | ||
831 | =cut | |
832 | */ | |
833 | ||
834 | GV * | |
835 | Perl_gv_fetchmeth_pv_autoload(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
836 | { | |
837 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV_AUTOLOAD; | |
838 | return gv_fetchmeth_pvn_autoload(stash, name, strlen(name), level, flags); | |
839 | } | |
840 | ||
841 | /* | |
842 | =for apidoc gv_fetchmeth_pvn_autoload | |
843 | ||
844 | Same as gv_fetchmeth_pvn(), but looks for autoloaded subroutines too. | |
611c1e95 IZ |
845 | Returns a glob for the subroutine. |
846 | ||
847 | For an autoloaded subroutine without a GV, will create a GV even | |
848 | if C<level < 0>. For an autoloaded subroutine without a stub, GvCV() | |
849 | of the result may be zero. | |
850 | ||
d21989ed BF |
851 | Currently, the only significant value for C<flags> is SVf_UTF8. |
852 | ||
611c1e95 IZ |
853 | =cut |
854 | */ | |
855 | ||
856 | GV * | |
d21989ed | 857 | Perl_gv_fetchmeth_pvn_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) |
611c1e95 | 858 | { |
499321d3 | 859 | GV *gv = gv_fetchmeth_pvn(stash, name, len, level, flags); |
611c1e95 | 860 | |
d21989ed | 861 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN_AUTOLOAD; |
7918f24d | 862 | |
611c1e95 | 863 | if (!gv) { |
611c1e95 IZ |
864 | CV *cv; |
865 | GV **gvp; | |
866 | ||
867 | if (!stash) | |
6136c704 | 868 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b | 869 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 | 870 | return NULL; |
d21989ed | 871 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, flags))) |
6136c704 | 872 | return NULL; |
611c1e95 IZ |
873 | cv = GvCV(gv); |
874 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 875 | return NULL; |
611c1e95 IZ |
876 | /* Have an autoload */ |
877 | if (level < 0) /* Cannot do without a stub */ | |
d21989ed | 878 | gv_fetchmeth_pvn(stash, name, len, 0, flags); |
c60dbbc3 BF |
879 | gvp = (GV**)hv_fetch(stash, name, |
880 | (flags & SVf_UTF8) ? -(I32)len : (I32)len, (level >= 0)); | |
611c1e95 | 881 | if (!gvp) |
6136c704 | 882 | return NULL; |
611c1e95 IZ |
883 | return *gvp; |
884 | } | |
885 | return gv; | |
886 | } | |
887 | ||
888 | /* | |
954c1994 GS |
889 | =for apidoc gv_fetchmethod_autoload |
890 | ||
891 | Returns the glob which contains the subroutine to call to invoke the method | |
892 | on the C<stash>. In fact in the presence of autoloading this may be the | |
893 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is | |
b267980d | 894 | already setup. |
954c1994 GS |
895 | |
896 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
897 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 898 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 899 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 900 | with a non-zero C<autoload> parameter. |
954c1994 GS |
901 | |
902 | These functions grant C<"SUPER"> token as a prefix of the method name. Note | |
903 | that if you want to keep the returned glob for a long time, you need to | |
904 | check for it being "AUTOLOAD", since at the later time the call may load a | |
905 | different subroutine due to $AUTOLOAD changing its value. Use the glob | |
b267980d | 906 | created via a side effect to do this. |
954c1994 GS |
907 | |
908 | These functions have the same side-effects and as C<gv_fetchmeth> with | |
909 | C<level==0>. C<name> should be writable if contains C<':'> or C<' | |
910 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to | |
b267980d | 911 | C<call_sv> apply equally to these functions. |
954c1994 GS |
912 | |
913 | =cut | |
914 | */ | |
915 | ||
dc848c6f | 916 | GV * |
864dbfa3 | 917 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 918 | { |
547bb267 NC |
919 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
920 | ||
256d1bb2 NC |
921 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
922 | } | |
923 | ||
44130a26 BF |
924 | GV * |
925 | Perl_gv_fetchmethod_sv_flags(pTHX_ HV *stash, SV *namesv, U32 flags) | |
926 | { | |
927 | char *namepv; | |
928 | STRLEN namelen; | |
929 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_SV_FLAGS; | |
930 | namepv = SvPV(namesv, namelen); | |
931 | if (SvUTF8(namesv)) | |
932 | flags |= SVf_UTF8; | |
933 | return gv_fetchmethod_pvn_flags(stash, namepv, namelen, flags); | |
934 | } | |
935 | ||
936 | GV * | |
937 | Perl_gv_fetchmethod_pv_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
938 | { | |
939 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PV_FLAGS; | |
940 | return gv_fetchmethod_pvn_flags(stash, name, strlen(name), flags); | |
941 | } | |
942 | ||
256d1bb2 NC |
943 | /* Don't merge this yet, as it's likely to get a len parameter, and possibly |
944 | even a U32 hash */ | |
945 | GV * | |
44130a26 | 946 | Perl_gv_fetchmethod_pvn_flags(pTHX_ HV *stash, const char *name, const STRLEN len, U32 flags) |
256d1bb2 | 947 | { |
97aff369 | 948 | dVAR; |
eb578fdb | 949 | const char *nend; |
c445ea15 | 950 | const char *nsplit = NULL; |
a0d0e21e | 951 | GV* gv; |
0dae17bd | 952 | HV* ostash = stash; |
c94593d0 | 953 | const char * const origname = name; |
ad64d0ec | 954 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 NC |
955 | const U32 autoload = flags & GV_AUTOLOAD; |
956 | const U32 do_croak = flags & GV_CROAK; | |
14d1dfbd | 957 | const U32 is_utf8 = flags & SVf_UTF8; |
0dae17bd | 958 | |
44130a26 | 959 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PVN_FLAGS; |
7918f24d | 960 | |
eff494dd | 961 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 | 962 | stash = NULL; |
c9bf4021 NC |
963 | else { |
964 | /* The only way stash can become NULL later on is if nsplit is set, | |
965 | which in turn means that there is no need for a SVt_PVHV case | |
966 | the error reporting code. */ | |
967 | } | |
b267980d | 968 | |
44130a26 | 969 | for (nend = name; *nend || nend != (origname + len); nend++) { |
c94593d0 | 970 | if (*nend == '\'') { |
a0d0e21e | 971 | nsplit = nend; |
c94593d0 NC |
972 | name = nend + 1; |
973 | } | |
974 | else if (*nend == ':' && *(nend + 1) == ':') { | |
975 | nsplit = nend++; | |
976 | name = nend + 1; | |
977 | } | |
a0d0e21e LW |
978 | } |
979 | if (nsplit) { | |
7edbdc6b | 980 | if ((nsplit - origname) == 5 && memEQ(origname, "SUPER", 5)) { |
9607fc9c | 981 | /* ->SUPER::method should really be looked up in original stash */ |
aae43805 FC |
982 | stash = CopSTASH(PL_curcop); |
983 | flags |= GV_SUPER; | |
cea2e8a9 | 984 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
0308a534 | 985 | origname, HvENAME_get(stash), name) ); |
4633a7c4 | 986 | } |
aae43805 FC |
987 | else if ((nsplit - origname) >= 7 && |
988 | strnEQ(nsplit - 7, "::SUPER", 7)) { | |
989 | /* don't autovifify if ->NoSuchStash::SUPER::method */ | |
990 | stash = gv_stashpvn(origname, nsplit - origname - 7, is_utf8); | |
991 | if (stash) flags |= GV_SUPER; | |
992 | } | |
e189a56d | 993 | else { |
af09ea45 | 994 | /* don't autovifify if ->NoSuchStash::method */ |
14d1dfbd | 995 | stash = gv_stashpvn(origname, nsplit - origname, is_utf8); |
e189a56d | 996 | } |
0dae17bd | 997 | ostash = stash; |
4633a7c4 LW |
998 | } |
999 | ||
14d1dfbd | 1000 | gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, flags); |
a0d0e21e | 1001 | if (!gv) { |
2f6e0fe7 | 1002 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
159b6efe | 1003 | gv = MUTABLE_GV(&PL_sv_yes); |
dc848c6f | 1004 | else if (autoload) |
c8416c26 BF |
1005 | gv = gv_autoload_pvn( |
1006 | ostash, name, nend - name, GV_AUTOLOAD_ISMETHOD|flags | |
1007 | ); | |
256d1bb2 NC |
1008 | if (!gv && do_croak) { |
1009 | /* Right now this is exclusively for the benefit of S_method_common | |
1010 | in pp_hot.c */ | |
1011 | if (stash) { | |
15e6cdd9 DG |
1012 | /* If we can't find an IO::File method, it might be a call on |
1013 | * a filehandle. If IO:File has not been loaded, try to | |
1014 | * require it first instead of croaking */ | |
1015 | const char *stash_name = HvNAME_get(stash); | |
31b05a0f FR |
1016 | if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File") |
1017 | && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL, | |
1018 | STR_WITH_LEN("IO/File.pm"), 0, | |
1019 | HV_FETCH_ISEXISTS, NULL, 0) | |
15e6cdd9 | 1020 | ) { |
31b05a0f | 1021 | require_pv("IO/File.pm"); |
14d1dfbd | 1022 | gv = gv_fetchmeth_pvn(stash, name, nend - name, 0, flags); |
15e6cdd9 DG |
1023 | if (gv) |
1024 | return gv; | |
1025 | } | |
256d1bb2 | 1026 | Perl_croak(aTHX_ |
b17a0679 | 1027 | "Can't locate object method \"%"UTF8f |
d0c0e7dd | 1028 | "\" via package \"%"HEKf"\"", |
b17a0679 | 1029 | UTF8fARG(is_utf8, nend - name, name), |
d0c0e7dd | 1030 | HEKfARG(HvNAME_HEK(stash))); |
256d1bb2 NC |
1031 | } |
1032 | else { | |
ecad31f0 | 1033 | SV* packnamesv; |
256d1bb2 | 1034 | |
256d1bb2 | 1035 | if (nsplit) { |
ecad31f0 BF |
1036 | packnamesv = newSVpvn_flags(origname, nsplit - origname, |
1037 | SVs_TEMP | is_utf8); | |
256d1bb2 | 1038 | } else { |
017c5e4e | 1039 | packnamesv = error_report; |
256d1bb2 NC |
1040 | } |
1041 | ||
1042 | Perl_croak(aTHX_ | |
b17a0679 FC |
1043 | "Can't locate object method \"%"UTF8f |
1044 | "\" via package \"%"SVf"\"" | |
ecad31f0 | 1045 | " (perhaps you forgot to load \"%"SVf"\"?)", |
b17a0679 | 1046 | UTF8fARG(is_utf8, nend - name, name), |
ecad31f0 | 1047 | SVfARG(packnamesv), SVfARG(packnamesv)); |
256d1bb2 NC |
1048 | } |
1049 | } | |
463ee0b2 | 1050 | } |
dc848c6f | 1051 | else if (autoload) { |
9d4ba2ae | 1052 | CV* const cv = GvCV(gv); |
09280a33 CS |
1053 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
1054 | GV* stubgv; | |
1055 | GV* autogv; | |
1056 | ||
1057 | if (CvANON(cv)) | |
1058 | stubgv = gv; | |
1059 | else { | |
1060 | stubgv = CvGV(cv); | |
1061 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
1062 | stubgv = gv; | |
1063 | } | |
c8416c26 BF |
1064 | autogv = gv_autoload_pvn(GvSTASH(stubgv), |
1065 | GvNAME(stubgv), GvNAMELEN(stubgv), | |
1066 | GV_AUTOLOAD_ISMETHOD | |
1067 | | (GvNAMEUTF8(stubgv) ? SVf_UTF8 : 0)); | |
dc848c6f | 1068 | if (autogv) |
1069 | gv = autogv; | |
1070 | } | |
1071 | } | |
44a8e56a | 1072 | |
1073 | return gv; | |
1074 | } | |
1075 | ||
1076 | GV* | |
0eeb01b9 | 1077 | Perl_gv_autoload_sv(pTHX_ HV *stash, SV* namesv, U32 flags) |
5fba3c91 BF |
1078 | { |
1079 | char *namepv; | |
1080 | STRLEN namelen; | |
0fe84f7c | 1081 | PERL_ARGS_ASSERT_GV_AUTOLOAD_SV; |
5fba3c91 BF |
1082 | namepv = SvPV(namesv, namelen); |
1083 | if (SvUTF8(namesv)) | |
1084 | flags |= SVf_UTF8; | |
0eeb01b9 | 1085 | return gv_autoload_pvn(stash, namepv, namelen, flags); |
5fba3c91 BF |
1086 | } |
1087 | ||
1088 | GV* | |
0eeb01b9 | 1089 | Perl_gv_autoload_pv(pTHX_ HV *stash, const char *namepv, U32 flags) |
5fba3c91 | 1090 | { |
0fe84f7c | 1091 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PV; |
0eeb01b9 | 1092 | return gv_autoload_pvn(stash, namepv, strlen(namepv), flags); |
5fba3c91 BF |
1093 | } |
1094 | ||
1095 | GV* | |
0eeb01b9 | 1096 | Perl_gv_autoload_pvn(pTHX_ HV *stash, const char *name, STRLEN len, U32 flags) |
44a8e56a | 1097 | { |
27da23d5 | 1098 | dVAR; |
44a8e56a | 1099 | GV* gv; |
1100 | CV* cv; | |
1101 | HV* varstash; | |
1102 | GV* vargv; | |
1103 | SV* varsv; | |
c8416c26 BF |
1104 | SV *packname = NULL; |
1105 | U32 is_utf8 = flags & SVf_UTF8 ? SVf_UTF8 : 0; | |
44a8e56a | 1106 | |
0fe84f7c | 1107 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PVN; |
7918f24d | 1108 | |
7edbdc6b | 1109 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c | 1110 | return NULL; |
0dae17bd GS |
1111 | if (stash) { |
1112 | if (SvTYPE(stash) < SVt_PVHV) { | |
c8416c26 BF |
1113 | STRLEN packname_len = 0; |
1114 | const char * const packname_ptr = SvPV_const(MUTABLE_SV(stash), packname_len); | |
1115 | packname = newSVpvn_flags(packname_ptr, packname_len, | |
1116 | SVs_TEMP | SvUTF8(stash)); | |
5c284bb0 | 1117 | stash = NULL; |
0dae17bd | 1118 | } |
c8416c26 BF |
1119 | else |
1120 | packname = sv_2mortal(newSVhek(HvNAME_HEK(stash))); | |
aae43805 | 1121 | if (flags & GV_SUPER) sv_catpvs(packname, "::SUPER"); |
0dae17bd | 1122 | } |
c8416c26 | 1123 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, is_utf8))) |
a0714e2c | 1124 | return NULL; |
dc848c6f | 1125 | cv = GvCV(gv); |
1126 | ||
adb5a9ae | 1127 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 1128 | return NULL; |
ed850460 | 1129 | |
dc848c6f | 1130 | /* |
1131 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
1132 | */ | |
0eeb01b9 FC |
1133 | if ( |
1134 | !(flags & GV_AUTOLOAD_ISMETHOD) | |
1135 | && (GvCVGEN(gv) || GvSTASH(gv) != stash) | |
041457d9 | 1136 | ) |
d1d15184 | 1137 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
b17a0679 FC |
1138 | "Use of inherited AUTOLOAD for non-method %"SVf |
1139 | "::%"UTF8f"() is deprecated", | |
ecad31f0 | 1140 | SVfARG(packname), |
b17a0679 | 1141 | UTF8fARG(is_utf8, len, name)); |
44a8e56a | 1142 | |
aed2304a | 1143 | if (CvISXSUB(cv)) { |
bb619f37 FC |
1144 | /* Instead of forcing the XSUB do another lookup for $AUTOLOAD |
1145 | * and split that value on the last '::', pass along the same data | |
1146 | * via the SvPVX field in the CV, and the stash in CvSTASH. | |
8fa6a409 FC |
1147 | * |
1148 | * Due to an unfortunate accident of history, the SvPVX field | |
e1fa07e3 | 1149 | * serves two purposes. It is also used for the subroutine's pro- |
8fa6a409 FC |
1150 | * type. Since SvPVX has been documented as returning the sub name |
1151 | * for a long time, but not as returning the prototype, we have | |
1152 | * to preserve the SvPVX AUTOLOAD behaviour and put the prototype | |
1153 | * elsewhere. | |
1154 | * | |
1155 | * We put the prototype in the same allocated buffer, but after | |
1156 | * the sub name. The SvPOK flag indicates the presence of a proto- | |
1157 | * type. The CvAUTOLOAD flag indicates the presence of a sub name. | |
1158 | * If both flags are on, then SvLEN is used to indicate the end of | |
1159 | * the prototype (artificially lower than what is actually allo- | |
1160 | * cated), at the risk of having to reallocate a few bytes unneces- | |
1161 | * sarily--but that should happen very rarely, if ever. | |
1162 | * | |
1163 | * We use SvUTF8 for both prototypes and sub names, so if one is | |
1164 | * UTF8, the other must be upgraded. | |
adb5a9ae | 1165 | */ |
c68d9564 | 1166 | CvSTASH_set(cv, stash); |
8fa6a409 | 1167 | if (SvPOK(cv)) { /* Ouch! */ |
e7881358 | 1168 | SV * const tmpsv = newSVpvn_flags(name, len, is_utf8); |
8fa6a409 FC |
1169 | STRLEN ulen; |
1170 | const char *proto = CvPROTO(cv); | |
1171 | assert(proto); | |
1172 | if (SvUTF8(cv)) | |
1173 | sv_utf8_upgrade_flags_grow(tmpsv, 0, CvPROTOLEN(cv) + 2); | |
1174 | ulen = SvCUR(tmpsv); | |
1175 | SvCUR(tmpsv)++; /* include null in string */ | |
1176 | sv_catpvn_flags( | |
1177 | tmpsv, proto, CvPROTOLEN(cv), SV_CATBYTES*!SvUTF8(cv) | |
1178 | ); | |
1179 | SvTEMP_on(tmpsv); /* Allow theft */ | |
1180 | sv_setsv_nomg((SV *)cv, tmpsv); | |
05b525f4 | 1181 | SvTEMP_off(tmpsv); |
e7881358 | 1182 | SvREFCNT_dec_NN(tmpsv); |
8fa6a409 FC |
1183 | SvLEN(cv) = SvCUR(cv) + 1; |
1184 | SvCUR(cv) = ulen; | |
1185 | } | |
1186 | else { | |
1187 | sv_setpvn((SV *)cv, name, len); | |
1188 | SvPOK_off(cv); | |
1189 | if (is_utf8) | |
c8416c26 | 1190 | SvUTF8_on(cv); |
8fa6a409 FC |
1191 | else SvUTF8_off(cv); |
1192 | } | |
1193 | CvAUTOLOAD_on(cv); | |
adb5a9ae | 1194 | } |
adb5a9ae | 1195 | |
44a8e56a | 1196 | /* |
1197 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
1198 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
1199 | * use that, but for lack of anything better we will use the sub's | |
1200 | * original package to look up $AUTOLOAD. | |
1201 | */ | |
1202 | varstash = GvSTASH(CvGV(cv)); | |
5c7983e5 | 1203 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
1204 | ENTER; |
1205 | ||
c69033f2 | 1206 | if (!isGV(vargv)) { |
04ec7e59 | 1207 | gv_init_pvn(vargv, varstash, S_autoload, S_autolen, 0); |
c69033f2 | 1208 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 1209 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
1210 | #endif |
1211 | } | |
3d35f11b | 1212 | LEAVE; |
e203899d | 1213 | varsv = GvSVn(vargv); |
4bac9ae4 CS |
1214 | SvTAINTED_off(varsv); /* previous $AUTOLOAD taint is obsolete */ |
1215 | /* XXX: this process is not careful to avoid extra magic gets and sets; tied $AUTOLOAD will get noise */ | |
c8416c26 | 1216 | sv_setsv(varsv, packname); |
396482e1 | 1217 | sv_catpvs(varsv, "::"); |
d40bf27b NC |
1218 | /* Ensure SvSETMAGIC() is called if necessary. In particular, to clear |
1219 | tainting if $FOO::AUTOLOAD was previously tainted, but is not now. */ | |
61a9130e FC |
1220 | sv_catpvn_flags( |
1221 | varsv, name, len, | |
5bcd1ef4 | 1222 | SV_SMAGIC|(is_utf8 ? SV_CATUTF8 : SV_CATBYTES) |
61a9130e | 1223 | ); |
c8416c26 BF |
1224 | if (is_utf8) |
1225 | SvUTF8_on(varsv); | |
a0d0e21e LW |
1226 | return gv; |
1227 | } | |
1228 | ||
44a2ac75 YO |
1229 | |
1230 | /* require_tie_mod() internal routine for requiring a module | |
486ec47a | 1231 | * that implements the logic of automatic ties like %! and %- |
44a2ac75 YO |
1232 | * |
1233 | * The "gv" parameter should be the glob. | |
45cbc99a RGS |
1234 | * "varpv" holds the name of the var, used for error messages. |
1235 | * "namesv" holds the module name. Its refcount will be decremented. | |
44a2ac75 | 1236 | * "methpv" holds the method name to test for to check that things |
45cbc99a RGS |
1237 | * are working reasonably close to as expected. |
1238 | * "flags": if flag & 1 then save the scalar before loading. | |
44a2ac75 YO |
1239 | * For the protection of $! to work (it is set by this routine) |
1240 | * the sv slot must already be magicalized. | |
d2c93421 | 1241 | */ |
44a2ac75 YO |
1242 | STATIC HV* |
1243 | S_require_tie_mod(pTHX_ GV *gv, const char *varpv, SV* namesv, const char *methpv,const U32 flags) | |
d2c93421 | 1244 | { |
27da23d5 | 1245 | dVAR; |
da51bb9b | 1246 | HV* stash = gv_stashsv(namesv, 0); |
45cbc99a | 1247 | |
7918f24d NC |
1248 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
1249 | ||
0ea03996 | 1250 | if (!stash || !(gv_fetchmethod_autoload(stash, methpv, FALSE))) { |
45cbc99a RGS |
1251 | SV *module = newSVsv(namesv); |
1252 | char varname = *varpv; /* varpv might be clobbered by load_module, | |
1253 | so save it. For the moment it's always | |
1254 | a single char. */ | |
b82b06b8 | 1255 | const char type = varname == '[' ? '$' : '%'; |
d2c93421 | 1256 | dSP; |
d2c93421 | 1257 | ENTER; |
600beb2e | 1258 | SAVEFREESV(namesv); |
44a2ac75 | 1259 | if ( flags & 1 ) |
45cbc99a | 1260 | save_scalar(gv); |
cac54379 | 1261 | PUSHSTACKi(PERLSI_MAGIC); |
45cbc99a | 1262 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
cac54379 | 1263 | POPSTACK; |
da51bb9b | 1264 | stash = gv_stashsv(namesv, 0); |
44a2ac75 | 1265 | if (!stash) |
b82b06b8 FC |
1266 | Perl_croak(aTHX_ "panic: Can't use %c%c because %"SVf" is not available", |
1267 | type, varname, SVfARG(namesv)); | |
45cbc99a | 1268 | else if (!gv_fetchmethod(stash, methpv)) |
b82b06b8 FC |
1269 | Perl_croak(aTHX_ "panic: Can't use %c%c because %"SVf" does not support method %s", |
1270 | type, varname, SVfARG(namesv), methpv); | |
600beb2e | 1271 | LEAVE; |
d2c93421 | 1272 | } |
e7881358 | 1273 | else SvREFCNT_dec_NN(namesv); |
44a2ac75 | 1274 | return stash; |
d2c93421 RH |
1275 | } |
1276 | ||
954c1994 GS |
1277 | /* |
1278 | =for apidoc gv_stashpv | |
1279 | ||
da51bb9b | 1280 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 1281 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
1282 | |
1283 | =cut | |
1284 | */ | |
1285 | ||
a0d0e21e | 1286 | HV* |
864dbfa3 | 1287 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 1288 | { |
7918f24d | 1289 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 1290 | return gv_stashpvn(name, strlen(name), create); |
1291 | } | |
1292 | ||
bc96cb06 SH |
1293 | /* |
1294 | =for apidoc gv_stashpvn | |
1295 | ||
da51bb9b NC |
1296 | Returns a pointer to the stash for a specified package. The C<namelen> |
1297 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
1298 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
1299 | created if it does not already exist. If the package does not exist and | |
1300 | C<flags> is 0 (or any other setting that does not create packages) then NULL | |
1301 | is returned. | |
1302 | ||
566a4718 YO |
1303 | Flags may be one of: |
1304 | ||
1305 | GV_ADD | |
1306 | SVf_UTF8 | |
1307 | GV_NOADD_NOINIT | |
1308 | GV_NOINIT | |
1309 | GV_NOEXPAND | |
1310 | GV_ADDMG | |
1311 | ||
1312 | The most important of which are probably GV_ADD and SVf_UTF8. | |
bc96cb06 SH |
1313 | |
1314 | =cut | |
1315 | */ | |
1316 | ||
dc437b57 | 1317 | HV* |
da51bb9b | 1318 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 1319 | { |
0cea0058 | 1320 | char smallbuf[128]; |
46fc3d4c | 1321 | char *tmpbuf; |
a0d0e21e LW |
1322 | HV *stash; |
1323 | GV *tmpgv; | |
add0ecde | 1324 | U32 tmplen = namelen + 2; |
dc437b57 | 1325 | |
7918f24d NC |
1326 | PERL_ARGS_ASSERT_GV_STASHPVN; |
1327 | ||
add0ecde | 1328 | if (tmplen <= sizeof smallbuf) |
46fc3d4c | 1329 | tmpbuf = smallbuf; |
1330 | else | |
add0ecde VP |
1331 | Newx(tmpbuf, tmplen, char); |
1332 | Copy(name, tmpbuf, namelen, char); | |
1333 | tmpbuf[namelen] = ':'; | |
1334 | tmpbuf[namelen+1] = ':'; | |
1335 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); | |
46fc3d4c | 1336 | if (tmpbuf != smallbuf) |
1337 | Safefree(tmpbuf); | |
a0d0e21e | 1338 | if (!tmpgv) |
da51bb9b | 1339 | return NULL; |
a0d0e21e | 1340 | stash = GvHV(tmpgv); |
1f656fcf | 1341 | if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL; |
9efb5c72 | 1342 | assert(stash); |
1f656fcf | 1343 | if (!HvNAME_get(stash)) { |
0be4d16f | 1344 | hv_name_set(stash, name, namelen, flags & SVf_UTF8 ? SVf_UTF8 : 0 ); |
1f656fcf FC |
1345 | |
1346 | /* FIXME: This is a repeat of logic in gv_fetchpvn_flags */ | |
1347 | /* If the containing stash has multiple effective | |
1348 | names, see that this one gets them, too. */ | |
1349 | if (HvAUX(GvSTASH(tmpgv))->xhv_name_count) | |
1350 | mro_package_moved(stash, NULL, tmpgv, 1); | |
1351 | } | |
a0d0e21e | 1352 | return stash; |
463ee0b2 LW |
1353 | } |
1354 | ||
954c1994 GS |
1355 | /* |
1356 | =for apidoc gv_stashsv | |
1357 | ||
da51bb9b | 1358 | Returns a pointer to the stash for a specified package. See C<gv_stashpvn>. |
954c1994 GS |
1359 | |
1360 | =cut | |
1361 | */ | |
1362 | ||
a0d0e21e | 1363 | HV* |
da51bb9b | 1364 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 1365 | { |
dc437b57 | 1366 | STRLEN len; |
9d4ba2ae | 1367 | const char * const ptr = SvPV_const(sv,len); |
7918f24d NC |
1368 | |
1369 | PERL_ARGS_ASSERT_GV_STASHSV; | |
1370 | ||
0be4d16f | 1371 | return gv_stashpvn(ptr, len, flags | SvUTF8(sv)); |
a0d0e21e LW |
1372 | } |
1373 | ||
1374 | ||
463ee0b2 | 1375 | GV * |
fe9845cc | 1376 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) { |
7918f24d | 1377 | PERL_ARGS_ASSERT_GV_FETCHPV; |
b7787f18 | 1378 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
1379 | } |
1380 | ||
1381 | GV * | |
fe9845cc | 1382 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 1383 | STRLEN len; |
77cb3b01 FC |
1384 | const char * const nambeg = |
1385 | SvPV_flags_const(name, len, flags & GV_NO_SVGMAGIC ? 0 : SV_GMAGIC); | |
7918f24d | 1386 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
1387 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
1388 | } | |
1389 | ||
90aeefb4 | 1390 | PERL_STATIC_INLINE void |
290a1700 | 1391 | S_gv_magicalize_isa(pTHX_ GV *gv) |
ad7cce9f FR |
1392 | { |
1393 | AV* av; | |
1394 | ||
1395 | PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA; | |
1396 | ||
1397 | av = GvAVn(gv); | |
1398 | GvMULTI_on(gv); | |
1399 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, | |
1400 | NULL, 0); | |
ad7cce9f FR |
1401 | } |
1402 | ||
90aeefb4 BF |
1403 | /* This function grabs name and tries to split a stash and glob |
1404 | * from its contents. TODO better description, comments | |
1405 | * | |
1406 | * If the function returns TRUE and 'name == name_end', then | |
1407 | * 'gv' can be directly returned to the caller of gv_fetchpvn_flags | |
1408 | */ | |
1409 | PERL_STATIC_INLINE bool | |
1410 | S_parse_gv_stash_name(pTHX_ HV **stash, GV **gv, const char **name, | |
1411 | STRLEN *len, const char *nambeg, STRLEN full_len, | |
1412 | const U32 is_utf8, const I32 add) | |
1413 | { | |
1414 | const char *name_cursor; | |
1415 | const char *const name_end = nambeg + full_len; | |
1416 | const char *const name_em1 = name_end - 1; | |
1417 | ||
1418 | PERL_ARGS_ASSERT_PARSE_GV_STASH_NAME; | |
1419 | ||
1420 | if (full_len > 2 && **name == '*' && isIDFIRST_lazy_if(*name + 1, is_utf8)) { | |
1421 | /* accidental stringify on a GV? */ | |
1422 | (*name)++; | |
1423 | } | |
1424 | ||
1425 | for (name_cursor = *name; name_cursor < name_end; name_cursor++) { | |
1426 | if (name_cursor < name_em1 && | |
1427 | ((*name_cursor == ':' && name_cursor[1] == ':') | |
1428 | || *name_cursor == '\'')) | |
1429 | { | |
1430 | if (!*stash) | |
1431 | *stash = PL_defstash; | |
1432 | if (!*stash || !SvREFCNT(*stash)) /* symbol table under destruction */ | |
1433 | return FALSE; | |
1434 | ||
1435 | *len = name_cursor - *name; | |
1436 | if (name_cursor > nambeg) { /* Skip for initial :: or ' */ | |
1437 | const char *key; | |
1438 | GV**gvp; | |
1439 | if (*name_cursor == ':') { | |
1440 | key = *name; | |
1441 | *len += 2; | |
1442 | } | |
1443 | else { | |
1444 | char *tmpbuf; | |
1445 | Newx(tmpbuf, *len+2, char); | |
1446 | Copy(*name, tmpbuf, *len, char); | |
1447 | tmpbuf[(*len)++] = ':'; | |
1448 | tmpbuf[(*len)++] = ':'; | |
1449 | key = tmpbuf; | |
1450 | } | |
1451 | gvp = (GV**)hv_fetch(*stash, key, is_utf8 ? -(*len) : *len, add); | |
1452 | *gv = gvp ? *gvp : NULL; | |
1453 | if (*gv && *gv != (const GV *)&PL_sv_undef) { | |
1454 | if (SvTYPE(*gv) != SVt_PVGV) | |
1455 | gv_init_pvn(*gv, *stash, key, *len, (add & GV_ADDMULTI)|is_utf8); | |
1456 | else | |
1457 | GvMULTI_on(*gv); | |
1458 | } | |
1459 | if (key != *name) | |
1460 | Safefree(key); | |
1461 | if (!*gv || *gv == (const GV *)&PL_sv_undef) | |
1462 | return FALSE; | |
1463 | ||
1464 | if (!(*stash = GvHV(*gv))) { | |
1465 | *stash = GvHV(*gv) = newHV(); | |
1466 | if (!HvNAME_get(*stash)) { | |
1467 | if (GvSTASH(*gv) == PL_defstash && *len == 6 | |
1468 | && strnEQ(*name, "CORE", 4)) | |
1469 | hv_name_set(*stash, "CORE", 4, 0); | |
1470 | else | |
1471 | hv_name_set( | |
1472 | *stash, nambeg, name_cursor-nambeg, is_utf8 | |
1473 | ); | |
1474 | /* If the containing stash has multiple effective | |
1475 | names, see that this one gets them, too. */ | |
1476 | if (HvAUX(GvSTASH(*gv))->xhv_name_count) | |
1477 | mro_package_moved(*stash, NULL, *gv, 1); | |
1478 | } | |
1479 | } | |
1480 | else if (!HvNAME_get(*stash)) | |
1481 | hv_name_set(*stash, nambeg, name_cursor - nambeg, is_utf8); | |
1482 | } | |
1483 | ||
1484 | if (*name_cursor == ':') | |
1485 | name_cursor++; | |
1486 | *name = name_cursor+1; | |
1487 | if (*name == name_end) { | |
1488 | if (!*gv) | |
1489 | *gv = MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); | |
1490 | return TRUE; | |
1491 | } | |
1492 | } | |
1493 | } | |
1494 | *len = name_cursor - *name; | |
1495 | return TRUE; | |
1496 | } | |
1497 | ||
1498 | /* This function is called if parse_gv_stash_name() failed to | |
1499 | * find a stash, or if GV_NOTQUAL or an empty name was passed | |
1500 | * to gv_fetchpvn_flags. | |
1501 | * | |
1502 | * It returns FALSE if the default stash can't be found nor created, | |
1503 | * which might happen during global destruction. | |
1504 | */ | |
1505 | PERL_STATIC_INLINE bool | |
1506 | S_find_default_stash(pTHX_ HV **stash, const char *name, STRLEN len, | |
1507 | const U32 is_utf8, const I32 add, | |
1508 | const svtype sv_type) | |
1509 | { | |
1510 | PERL_ARGS_ASSERT_FIND_DEFAULT_STASH; | |
1511 | ||
1512 | /* No stash in name, so see how we can default */ | |
1513 | ||
1514 | /* If it's an alphanumeric variable */ | |
1515 | if (len && isIDFIRST_lazy_if(name, is_utf8)) { | |
1516 | bool global = FALSE; | |
1517 | ||
1518 | /* Some "normal" variables are always in main::, | |
1519 | * like INC or STDOUT. | |
1520 | */ | |
1521 | switch (len) { | |
1522 | case 1: | |
1523 | if (*name == '_') | |
1524 | global = TRUE; | |
1525 | break; | |
1526 | case 3: | |
1527 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1528 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1529 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
1530 | global = TRUE; | |
1531 | break; | |
1532 | case 4: | |
1533 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1534 | && name[3] == 'V') | |
1535 | global = TRUE; | |
1536 | break; | |
1537 | case 5: | |
1538 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1539 | && name[3] == 'I' && name[4] == 'N') | |
1540 | global = TRUE; | |
1541 | break; | |
1542 | case 6: | |
1543 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1544 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1545 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
1546 | global = TRUE; | |
1547 | break; | |
1548 | case 7: | |
1549 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1550 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1551 | && name[6] == 'T') | |
1552 | global = TRUE; | |
1553 | break; | |
1554 | } | |
1555 | ||
1556 | if (global) | |
1557 | *stash = PL_defstash; | |
1558 | else if (IN_PERL_COMPILETIME) { | |
1559 | *stash = PL_curstash; | |
1560 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
1561 | sv_type != SVt_PVCV && | |
1562 | sv_type != SVt_PVGV && | |
1563 | sv_type != SVt_PVFM && | |
1564 | sv_type != SVt_PVIO && | |
1565 | !(len == 1 && sv_type == SVt_PV && | |
1566 | (*name == 'a' || *name == 'b')) ) | |
1567 | { | |
1568 | GV**gvp = (GV**)hv_fetch(*stash,name,is_utf8 ? -len : len,0); | |
1569 | if (!gvp || *gvp == (const GV *)&PL_sv_undef || | |
1570 | SvTYPE(*gvp) != SVt_PVGV) | |
1571 | { | |
1572 | *stash = NULL; | |
1573 | } | |
1574 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || | |
1575 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1576 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
1577 | { | |
1578 | /* diag_listed_as: Variable "%s" is not imported%s */ | |
1579 | Perl_ck_warner_d( | |
1580 | aTHX_ packWARN(WARN_MISC), | |
1581 | "Variable \"%c%"UTF8f"\" is not imported", | |
1582 | sv_type == SVt_PVAV ? '@' : | |
1583 | sv_type == SVt_PVHV ? '%' : '$', | |
1584 | UTF8fARG(is_utf8, len, name)); | |
1585 | if (GvCVu(*gvp)) | |
1586 | Perl_ck_warner_d( | |
1587 | aTHX_ packWARN(WARN_MISC), | |
1588 | "\t(Did you mean &%"UTF8f" instead?)\n", | |
1589 | UTF8fARG(is_utf8, len, name) | |
1590 | ); | |
1591 | *stash = NULL; | |
1592 | } | |
1593 | } | |
1594 | } | |
1595 | else { | |
1596 | /* Use the current op's stash */ | |
1597 | *stash = CopSTASH(PL_curcop); | |
1598 | } | |
1599 | } | |
1600 | /* *{""}, or a special variable like $@ */ | |
1601 | else | |
1602 | *stash = PL_defstash; | |
1603 | ||
1604 | if (!*stash) { | |
1605 | if (add && !PL_in_clean_all) { | |
1606 | SV * const err = Perl_mess(aTHX_ | |
1607 | "Global symbol \"%s%"UTF8f | |
1608 | "\" requires explicit package name", | |
1609 | (sv_type == SVt_PV ? "$" | |
1610 | : sv_type == SVt_PVAV ? "@" | |
1611 | : sv_type == SVt_PVHV ? "%" | |
1612 | : ""), UTF8fARG(is_utf8, len, name)); | |
1613 | GV *gv; | |
1614 | if (is_utf8) | |
1615 | SvUTF8_on(err); | |
1616 | qerror(err); | |
cd164bf8 BF |
1617 | /* To maintain the output of errors after the strict exception |
1618 | * above, and to keep compat with older releases, rather than | |
1619 | * placing the variables in the pad, we place | |
1620 | * them in the <none>:: stash. | |
1621 | */ | |
90aeefb4 BF |
1622 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
1623 | if (!gv) { | |
1624 | /* symbol table under destruction */ | |
1625 | return FALSE; | |
1626 | } | |
1627 | *stash = GvHV(gv); | |
1628 | } | |
1629 | else | |
1630 | return FALSE; | |
1631 | } | |
1632 | ||
1633 | if (!SvREFCNT(*stash)) /* symbol table under destruction */ | |
1634 | return FALSE; | |
1635 | ||
1636 | return TRUE; | |
1637 | } | |
1638 | ||
930867a8 BF |
1639 | /* gv_magicalize() is called by gv_fetchpvn_flags when creating |
1640 | * a new GV. | |
1641 | * Note that it does not insert the GV into the stash prior to | |
1642 | * magicalization, which some variables require need in order | |
1643 | * to work (like $[, %+, %-, %!), so callers must take care of | |
1644 | * that beforehand. | |
1645 | * | |
1646 | * The return value has a specific meaning for gv_fetchpvn_flags: | |
1647 | * If it returns true, and the gv is empty, it indicates that its | |
1648 | * refcount should be decreased. | |
1649 | */ | |
1650 | PERL_STATIC_INLINE bool | |
1651 | S_gv_magicalize(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, | |
71c35c05 | 1652 | bool addmg, const svtype sv_type) |
79072805 | 1653 | { |
960b831f | 1654 | SSize_t paren; |
79072805 | 1655 | |
930867a8 | 1656 | PERL_ARGS_ASSERT_GV_MAGICALIZE; |
90aeefb4 | 1657 | |
44428a46 | 1658 | if (stash != PL_defstash) { /* not the main stash */ |
5fdfd519 | 1659 | /* We only have to check for three names here: EXPORT, ISA |
4aaa4757 FC |
1660 | and VERSION. All the others apply only to the main stash or to |
1661 | CORE (which is checked right after this). */ | |
f4e68e82 | 1662 | if (len > 2) { |
b464bac0 | 1663 | const char * const name2 = name + 1; |
cc4c2da6 | 1664 | switch (*name) { |
cc4c2da6 NC |
1665 | case 'E': |
1666 | if (strnEQ(name2, "XPORT", 5)) | |
1667 | GvMULTI_on(gv); | |
1668 | break; | |
1669 | case 'I': | |
44428a46 | 1670 | if (strEQ(name2, "SA")) |
290a1700 | 1671 | gv_magicalize_isa(gv); |
cc4c2da6 | 1672 | break; |
44428a46 FC |
1673 | case 'V': |
1674 | if (strEQ(name2, "ERSION")) | |
1675 | GvMULTI_on(gv); | |
1676 | break; | |
4aaa4757 FC |
1677 | default: |
1678 | goto try_core; | |
1679 | } | |
930867a8 | 1680 | return addmg; |
4aaa4757 FC |
1681 | } |
1682 | try_core: | |
1683 | if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) { | |
1684 | /* Avoid null warning: */ | |
1685 | const char * const stashname = HvNAME(stash); assert(stashname); | |
87566176 FC |
1686 | if (strnEQ(stashname, "CORE", 4)) |
1687 | S_maybe_add_coresub(aTHX_ 0, gv, name, len); | |
44428a46 FC |
1688 | } |
1689 | } | |
1690 | else if (len > 1) { | |
1691 | #ifndef EBCDIC | |
1692 | if (*name > 'V' ) { | |
1693 | NOOP; | |
1694 | /* Nothing else to do. | |
1695 | The compiler will probably turn the switch statement into a | |
1696 | branch table. Make sure we avoid even that small overhead for | |
2ae25f5c KW |
1697 | the common case of lower case variable names. (On EBCDIC |
1698 | platforms, we can't just do: | |
1699 | if (NATIVE_TO_ASCII(*name) > NATIVE_TO_ASCII('V') ) { | |
1700 | because cases like '\027' in the switch statement below are | |
1701 | C1 (non-ASCII) controls on those platforms, so the remapping | |
1702 | would make them larger than 'V') | |
1703 | */ | |
44428a46 FC |
1704 | } else |
1705 | #endif | |
1706 | { | |
1707 | const char * const name2 = name + 1; | |
1708 | switch (*name) { | |
1709 | case 'A': | |
1710 | if (strEQ(name2, "RGV")) { | |
1711 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
1712 | } | |
1713 | else if (strEQ(name2, "RGVOUT")) { | |
1714 | GvMULTI_on(gv); | |
1715 | } | |
1716 | break; | |
1717 | case 'E': | |
1718 | if (strnEQ(name2, "XPORT", 5)) | |
1719 | GvMULTI_on(gv); | |
1720 | break; | |
1721 | case 'I': | |
1722 | if (strEQ(name2, "SA")) { | |
290a1700 | 1723 | gv_magicalize_isa(gv); |
44428a46 FC |
1724 | } |
1725 | break; | |
cc4c2da6 NC |
1726 | case 'S': |
1727 | if (strEQ(name2, "IG")) { | |
1728 | HV *hv; | |
1729 | I32 i; | |
d525a7b2 NC |
1730 | if (!PL_psig_name) { |
1731 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); | |
a02a5408 | 1732 | Newxz(PL_psig_pend, SIG_SIZE, int); |
d525a7b2 | 1733 | PL_psig_ptr = PL_psig_name + SIG_SIZE; |
0bdedcb3 NC |
1734 | } else { |
1735 | /* I think that the only way to get here is to re-use an | |
1736 | embedded perl interpreter, where the previous | |
1737 | use didn't clean up fully because | |
1738 | PL_perl_destruct_level was 0. I'm not sure that we | |
1739 | "support" that, in that I suspect in that scenario | |
1740 | there are sufficient other garbage values left in the | |
1741 | interpreter structure that something else will crash | |
1742 | before we get here. I suspect that this is one of | |
1743 | those "doctor, it hurts when I do this" bugs. */ | |
d525a7b2 | 1744 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); |
0bdedcb3 | 1745 | Zero(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 NC |
1746 | } |
1747 | GvMULTI_on(gv); | |
1748 | hv = GvHVn(gv); | |
a0714e2c | 1749 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 1750 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 1751 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
1752 | if (init) |
1753 | sv_setsv(*init, &PL_sv_undef); | |
cc4c2da6 NC |
1754 | } |
1755 | } | |
1756 | break; | |
1757 | case 'V': | |
1758 | if (strEQ(name2, "ERSION")) | |
1759 | GvMULTI_on(gv); | |
1760 | break; | |
e5218da5 GA |
1761 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
1762 | if (strEQ(name2, "HILD_ERROR_NATIVE")) | |
1763 | goto magicalize; | |
1764 | break; | |
cc4c2da6 NC |
1765 | case '\005': /* $^ENCODING */ |
1766 | if (strEQ(name2, "NCODING")) | |
1767 | goto magicalize; | |
1768 | break; | |
9ebf26ad FR |
1769 | case '\007': /* $^GLOBAL_PHASE */ |
1770 | if (strEQ(name2, "LOBAL_PHASE")) | |
1771 | goto ro_magicalize; | |
1772 | break; | |
8561ea1d FC |
1773 | case '\014': /* $^LAST_FH */ |
1774 | if (strEQ(name2, "AST_FH")) | |
1775 | goto ro_magicalize; | |
1776 | break; | |
cde0cee5 | 1777 | case '\015': /* $^MATCH */ |
960b831f NC |
1778 | if (strEQ(name2, "ATCH")) { |
1779 | paren = RX_BUFF_IDX_CARET_FULLMATCH; | |
1780 | goto storeparen; | |
1781 | } | |
66230c86 | 1782 | break; |
cc4c2da6 NC |
1783 | case '\017': /* $^OPEN */ |
1784 | if (strEQ(name2, "PEN")) | |
1785 | goto magicalize; | |
1786 | break; | |
cde0cee5 | 1787 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
960b831f NC |
1788 | if (strEQ(name2, "REMATCH")) { |
1789 | paren = RX_BUFF_IDX_CARET_PREMATCH; | |
1790 | goto storeparen; | |
1791 | } | |
1792 | if (strEQ(name2, "OSTMATCH")) { | |
1793 | paren = RX_BUFF_IDX_CARET_POSTMATCH; | |
1794 | goto storeparen; | |
1795 | } | |
9ebf26ad | 1796 | break; |
cc4c2da6 NC |
1797 | case '\024': /* ${^TAINT} */ |
1798 | if (strEQ(name2, "AINT")) | |
1799 | goto ro_magicalize; | |
1800 | break; | |
7cebcbc0 | 1801 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
a0288114 | 1802 | if (strEQ(name2, "NICODE")) |
cc4c2da6 | 1803 | goto ro_magicalize; |
a0288114 | 1804 | if (strEQ(name2, "TF8LOCALE")) |
7cebcbc0 | 1805 | goto ro_magicalize; |
e07ea26a NC |
1806 | if (strEQ(name2, "TF8CACHE")) |
1807 | goto magicalize; | |
cc4c2da6 NC |
1808 | break; |
1809 | case '\027': /* $^WARNING_BITS */ | |
1810 | if (strEQ(name2, "ARNING_BITS")) | |
1811 | goto magicalize; | |
1812 | break; | |
1813 | case '1': | |
1814 | case '2': | |
1815 | case '3': | |
1816 | case '4': | |
1817 | case '5': | |
1818 | case '6': | |
1819 | case '7': | |
1820 | case '8': | |
1821 | case '9': | |
85e6fe83 | 1822 | { |
2fdbfb4d AB |
1823 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
1824 | this test */ | |
1825 | /* This snippet is taken from is_gv_magical */ | |
cc4c2da6 NC |
1826 | const char *end = name + len; |
1827 | while (--end > name) { | |
930867a8 BF |
1828 | if (!isDIGIT(*end)) |
1829 | return addmg; | |
cc4c2da6 | 1830 | } |
960b831f NC |
1831 | paren = strtoul(name, NULL, 10); |
1832 | goto storeparen; | |
1d7c1841 | 1833 | } |
dc437b57 | 1834 | } |
93a17b20 | 1835 | } |
392db708 NC |
1836 | } else { |
1837 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
1838 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 | 1839 | switch (*name) { |
6361f656 | 1840 | case '&': /* $& */ |
960b831f NC |
1841 | paren = RX_BUFF_IDX_FULLMATCH; |
1842 | goto sawampersand; | |
6361f656 | 1843 | case '`': /* $` */ |
960b831f NC |
1844 | paren = RX_BUFF_IDX_PREMATCH; |
1845 | goto sawampersand; | |
6361f656 | 1846 | case '\'': /* $' */ |
960b831f NC |
1847 | paren = RX_BUFF_IDX_POSTMATCH; |
1848 | sawampersand: | |
1a904fc8 | 1849 | #ifdef PERL_SAWAMPERSAND |
a289ef89 | 1850 | if (!( |
cc4c2da6 NC |
1851 | sv_type == SVt_PVAV || |
1852 | sv_type == SVt_PVHV || | |
1853 | sv_type == SVt_PVCV || | |
1854 | sv_type == SVt_PVFM || | |
1855 | sv_type == SVt_PVIO | |
d3b97530 DM |
1856 | )) { PL_sawampersand |= |
1857 | (*name == '`') | |
1858 | ? SAWAMPERSAND_LEFT | |
1859 | : (*name == '&') | |
1860 | ? SAWAMPERSAND_MIDDLE | |
1861 | : SAWAMPERSAND_RIGHT; | |
1862 | } | |
1a904fc8 | 1863 | #endif |
960b831f | 1864 | goto storeparen; |
e91d8259 NC |
1865 | case '1': /* $1 */ |
1866 | case '2': /* $2 */ | |
1867 | case '3': /* $3 */ | |
1868 | case '4': /* $4 */ | |
1869 | case '5': /* $5 */ | |
1870 | case '6': /* $6 */ | |
1871 | case '7': /* $7 */ | |
1872 | case '8': /* $8 */ | |
1873 | case '9': /* $9 */ | |
960b831f NC |
1874 | paren = *name - '0'; |
1875 | ||
1876 | storeparen: | |
e91d8259 NC |
1877 | /* Flag the capture variables with a NULL mg_ptr |
1878 | Use mg_len for the array index to lookup. */ | |
960b831f | 1879 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, NULL, paren); |
e91d8259 | 1880 | break; |
cc4c2da6 | 1881 | |
6361f656 | 1882 | case ':': /* $: */ |
c69033f2 | 1883 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
1884 | goto magicalize; |
1885 | ||
6361f656 | 1886 | case '?': /* $? */ |
ff0cee69 | 1887 | #ifdef COMPLEX_STATUS |
c69033f2 | 1888 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 1889 | #endif |
cc4c2da6 | 1890 | goto magicalize; |
ff0cee69 | 1891 | |
6361f656 | 1892 | case '!': /* $! */ |
67261566 | 1893 | GvMULTI_on(gv); |
44a2ac75 | 1894 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 1895 | |
ad64d0ec | 1896 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 | 1897 | |
44a2ac75 | 1898 | /* magicalization must be done before require_tie_mod is called */ |
67261566 | 1899 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
ffdb8bcd | 1900 | { |
44a2ac75 | 1901 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); |
930867a8 | 1902 | addmg = FALSE; |
ffdb8bcd | 1903 | } |
d2c93421 | 1904 | |
6cef1e77 | 1905 | break; |
6361f656 AB |
1906 | case '-': /* $- */ |
1907 | case '+': /* $+ */ | |
44a2ac75 YO |
1908 | GvMULTI_on(gv); /* no used once warnings here */ |
1909 | { | |
44a2ac75 | 1910 | AV* const av = GvAVn(gv); |
ad64d0ec | 1911 | SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL; |
44a2ac75 | 1912 | |
ad64d0ec NC |
1913 | sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0); |
1914 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
67261566 | 1915 | if (avc) |
44a2ac75 | 1916 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 | 1917 | SvREADONLY_on(av); |
67261566 YO |
1918 | |
1919 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
213084e4 | 1920 | { |
192b9cd1 | 1921 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); |
930867a8 | 1922 | addmg = FALSE; |
213084e4 | 1923 | } |
67261566 | 1924 | |
80305961 | 1925 | break; |
cc4c2da6 | 1926 | } |
6361f656 AB |
1927 | case '*': /* $* */ |
1928 | case '#': /* $# */ | |
9b387841 | 1929 | if (sv_type == SVt_PV) |
4f650b80 | 1930 | /* diag_listed_as: $* is no longer supported */ |
9b387841 | 1931 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
4f650b80 | 1932 | "$%c is no longer supported", *name); |
8ae1fe26 | 1933 | break; |
b3ca2e83 NC |
1934 | case '\010': /* $^H */ |
1935 | { | |
1936 | HV *const hv = GvHVn(gv); | |
1937 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
1938 | } | |
1939 | goto magicalize; | |
b82b06b8 | 1940 | case '[': /* $[ */ |
7d69d4a6 | 1941 | if ((sv_type == SVt_PV || sv_type == SVt_PVGV) |
2846acbf | 1942 | && FEATURE_ARYBASE_IS_ENABLED) { |
b82b06b8 | 1943 | require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0); |
930867a8 | 1944 | addmg = FALSE; |
b82b06b8 | 1945 | } |
7d69d4a6 | 1946 | else goto magicalize; |
b82b06b8 | 1947 | break; |
cc4c2da6 | 1948 | case '\023': /* $^S */ |
2fdbfb4d AB |
1949 | ro_magicalize: |
1950 | SvREADONLY_on(GvSVn(gv)); | |
1951 | /* FALL THROUGH */ | |
6361f656 | 1952 | case '0': /* $0 */ |
6361f656 AB |
1953 | case '^': /* $^ */ |
1954 | case '~': /* $~ */ | |
1955 | case '=': /* $= */ | |
1956 | case '%': /* $% */ | |
1957 | case '.': /* $. */ | |
1958 | case '(': /* $( */ | |
1959 | case ')': /* $) */ | |
1960 | case '<': /* $< */ | |
1961 | case '>': /* $> */ | |
1962 | case '\\': /* $\ */ | |
1963 | case '/': /* $/ */ | |
4505a31f | 1964 | case '|': /* $| */ |
9cdac2a2 | 1965 | case '$': /* $$ */ |
cc4c2da6 NC |
1966 | case '\001': /* $^A */ |
1967 | case '\003': /* $^C */ | |
1968 | case '\004': /* $^D */ | |
1969 | case '\005': /* $^E */ | |
1970 | case '\006': /* $^F */ | |
cc4c2da6 NC |
1971 | case '\011': /* $^I, NOT \t in EBCDIC */ |
1972 | case '\016': /* $^N */ | |
1973 | case '\017': /* $^O */ | |
1974 | case '\020': /* $^P */ | |
1975 | case '\024': /* $^T */ | |
1976 | case '\027': /* $^W */ | |
1977 | magicalize: | |
ad64d0ec | 1978 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
cc4c2da6 | 1979 | break; |
e521374c | 1980 | |
cc4c2da6 | 1981 | case '\014': /* $^L */ |
76f68e9b | 1982 | sv_setpvs(GvSVn(gv),"\f"); |
463ee0b2 | 1983 | break; |
6361f656 | 1984 | case ';': /* $; */ |
76f68e9b | 1985 | sv_setpvs(GvSVn(gv),"\034"); |
463ee0b2 | 1986 | break; |
6361f656 | 1987 | case ']': /* $] */ |
cc4c2da6 | 1988 | { |
3638bf15 | 1989 | SV * const sv = GvSV(gv); |
d7aa5382 | 1990 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 1991 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
1992 | GvSV(gv) = vnumify(PL_patchlevel); |
1993 | SvREADONLY_on(GvSV(gv)); | |
1994 | SvREFCNT_dec(sv); | |
93a17b20 LW |
1995 | } |
1996 | break; | |
cc4c2da6 NC |
1997 | case '\026': /* $^V */ |
1998 | { | |
3638bf15 | 1999 | SV * const sv = GvSV(gv); |
f9be5ac8 DM |
2000 | GvSV(gv) = new_version(PL_patchlevel); |
2001 | SvREADONLY_on(GvSV(gv)); | |
2002 | SvREFCNT_dec(sv); | |
16070b82 GS |
2003 | } |
2004 | break; | |
cc4c2da6 | 2005 | } |
79072805 | 2006 | } |
930867a8 BF |
2007 | |
2008 | return addmg; | |
71c35c05 BF |
2009 | } |
2010 | ||
070dc475 BF |
2011 | /* This function is called when the stash already holds the GV of the magic |
2012 | * variable we're looking for, but we need to check that it has the correct | |
2013 | * kind of magic. For example, if someone first uses $! and then %!, the | |
2014 | * latter would end up here, and we add the Errno tie to the HASH slot of | |
2015 | * the *! glob. | |
2016 | */ | |
2017 | PERL_STATIC_INLINE void | |
2018 | S_maybe_multimagic_gv(pTHX_ GV *gv, const char *name, const svtype sv_type) | |
2019 | { | |
2020 | PERL_ARGS_ASSERT_MAYBE_MULTIMAGIC_GV; | |
2021 | ||
2022 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) { | |
2023 | if (*name == '!') | |
2024 | require_tie_mod(gv, "!", newSVpvs("Errno"), "TIEHASH", 1); | |
2025 | else if (*name == '-' || *name == '+') | |
2026 | require_tie_mod(gv, name, newSVpvs("Tie::Hash::NamedCapture"), "TIEHASH", 0); | |
2027 | } else if (sv_type == SVt_PV) { | |
2028 | if (*name == '*' || *name == '#') { | |
2029 | /* diag_listed_as: $* is no longer supported */ | |
2030 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, | |
2031 | WARN_SYNTAX), | |
2032 | "$%c is no longer supported", *name); | |
2033 | } | |
2034 | } | |
2035 | if (sv_type==SVt_PV || sv_type==SVt_PVGV) { | |
2036 | switch (*name) { | |
2037 | case '[': | |
2038 | require_tie_mod(gv,name,newSVpvs("arybase"),"FETCH",0); | |
2039 | break; | |
2040 | #ifdef PERL_SAWAMPERSAND | |
2041 | case '`': | |
2042 | PL_sawampersand |= SAWAMPERSAND_LEFT; | |
2043 | (void)GvSVn(gv); | |
2044 | break; | |
2045 | case '&': | |
2046 | PL_sawampersand |= SAWAMPERSAND_MIDDLE; | |
2047 | (void)GvSVn(gv); | |
2048 | break; | |
2049 | case '\'': | |
2050 | PL_sawampersand |= SAWAMPERSAND_RIGHT; | |
2051 | (void)GvSVn(gv); | |
2052 | break; | |
2053 | #endif | |
2054 | } | |
2055 | } | |
2056 | } | |
2057 | ||
71c35c05 BF |
2058 | GV * |
2059 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
2060 | const svtype sv_type) | |
2061 | { | |
2062 | dVAR; | |
2063 | const char *name = nambeg; | |
2064 | GV *gv = NULL; | |
2065 | GV**gvp; | |
2066 | STRLEN len; | |
2067 | HV *stash = NULL; | |
2068 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); | |
2069 | const I32 no_expand = flags & GV_NOEXPAND; | |
2070 | const I32 add = flags & ~GV_NOADD_MASK; | |
2071 | const U32 is_utf8 = flags & SVf_UTF8; | |
930867a8 | 2072 | bool addmg = cBOOL(flags & GV_ADDMG); |
71c35c05 BF |
2073 | const char *const name_end = nambeg + full_len; |
2074 | U32 faking_it; | |
2075 | ||
2076 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; | |
2077 | ||
2078 | /* If we have GV_NOTQUAL, the caller promised that | |
2079 | * there is no stash, so we can skip the check. | |
2080 | * Similarly if full_len is 0, since then we're | |
2081 | * dealing with something like *{""} or ""->foo() | |
2082 | */ | |
2083 | if ((flags & GV_NOTQUAL) || !full_len) { | |
2084 | len = full_len; | |
2085 | } | |
2086 | else if (parse_gv_stash_name(&stash, &gv, &name, &len, nambeg, full_len, is_utf8, add)) { | |
2087 | if (name == name_end) return gv; | |
2088 | } | |
2089 | else { | |
2090 | return NULL; | |
2091 | } | |
2092 | ||
2093 | if (!stash && !find_default_stash(&stash, name, len, is_utf8, add, sv_type)) { | |
2094 | return NULL; | |
2095 | } | |
2096 | ||
2097 | /* By this point we should have a stash and a name */ | |
2098 | gvp = (GV**)hv_fetch(stash,name,is_utf8 ? -len : len,add); | |
2099 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) { | |
2100 | if (addmg) gv = (GV *)newSV(0); | |
2101 | else return NULL; | |
2102 | } | |
2103 | else gv = *gvp, addmg = 0; | |
2104 | /* From this point on, addmg means gv has not been inserted in the | |
2105 | symtab yet. */ | |
2106 | ||
2107 | if (SvTYPE(gv) == SVt_PVGV) { | |
c002ae9a BF |
2108 | /* The GV already exists, so return it, but check if we need to do |
2109 | * anything else with it before that. | |
2110 | */ | |
71c35c05 | 2111 | if (add) { |
c002ae9a BF |
2112 | /* This is the heuristic that handles if a variable triggers the |
2113 | * 'used only once' warning. If there's already a GV in the stash | |
2114 | * with this name, then we assume that the variable has been used | |
2115 | * before and turn its MULTI flag on. | |
2116 | * It's a heuristic because it can easily be "tricked", like with | |
2117 | * BEGIN { $a = 1; $::{foo} = *a }; () = $foo | |
2118 | * not warning about $main::foo being used just once | |
2119 | */ | |
71c35c05 BF |
2120 | GvMULTI_on(gv); |
2121 | gv_init_svtype(gv, sv_type); | |
2122 | /* You reach this path once the typeglob has already been created, | |
2123 | either by the same or a different sigil. If this path didn't | |
2124 | exist, then (say) referencing $! first, and %! second would | |
2125 | mean that %! was not handled correctly. */ | |
2126 | if (len == 1 && stash == PL_defstash) { | |
070dc475 | 2127 | maybe_multimagic_gv(gv, name, sv_type); |
71c35c05 BF |
2128 | } |
2129 | else if (len == 3 && sv_type == SVt_PVAV | |
2130 | && strnEQ(name, "ISA", 3) | |
2131 | && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv)))) | |
2132 | gv_magicalize_isa(gv); | |
2133 | } | |
2134 | return gv; | |
2135 | } else if (no_init) { | |
2136 | assert(!addmg); | |
2137 | return gv; | |
c002ae9a BF |
2138 | } |
2139 | /* If GV_NOEXPAND is true and what we got off the stash is a ref, | |
2140 | * don't expand it to a glob. This is an optimization so that things | |
2141 | * copying constants over, like Exporter, don't have to be rewritten | |
2142 | * to take into account that you can store more than just globs in | |
2143 | * stashes. | |
2144 | */ | |
2145 | else if (no_expand && SvROK(gv)) { | |
71c35c05 BF |
2146 | assert(!addmg); |
2147 | return gv; | |
2148 | } | |
2149 | ||
2150 | /* Adding a new symbol. | |
2151 | Unless of course there was already something non-GV here, in which case | |
2152 | we want to behave as if there was always a GV here, containing some sort | |
2153 | of subroutine. | |
2154 | Otherwise we run the risk of creating things like GvIO, which can cause | |
2155 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
2156 | ||
2157 | faking_it = SvOK(gv); | |
2158 | ||
2159 | if (add & GV_ADDWARN) | |
2160 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
2161 | "Had to create %"UTF8f" unexpectedly", | |
2162 | UTF8fARG(is_utf8, name_end-nambeg, nambeg)); | |
2163 | gv_init_pvn(gv, stash, name, len, (add & GV_ADDMULTI)|is_utf8); | |
2164 | ||
9e5de6ae | 2165 | if ( isIDFIRST_lazy_if(name, is_utf8) && !ckWARN(WARN_ONCE) ) |
71c35c05 BF |
2166 | GvMULTI_on(gv) ; |
2167 | ||
930867a8 BF |
2168 | /* First, store the gv in the symtab if we're adding magic, |
2169 | * but only for non-empty GVs | |
2170 | */ | |
2171 | #define GvEMPTY(gv) !(GvAV(gv) || GvHV(gv) || GvIO(gv) \ | |
2172 | || GvCV(gv) || (GvSV(gv) && SvOK(GvSV(gv)))) | |
2173 | ||
2174 | if ( addmg && !GvEMPTY(gv) ) { | |
2175 | (void)hv_store(stash,name,len,(SV *)gv,0); | |
2176 | } | |
2177 | ||
71c35c05 | 2178 | /* set up magic where warranted */ |
930867a8 BF |
2179 | if ( gv_magicalize(gv, stash, name, len, addmg, sv_type) ) { |
2180 | /* See 23496c6 */ | |
2181 | if (GvEMPTY(gv)) { | |
2182 | if ( GvSV(gv) && SvMAGICAL(GvSV(gv)) ) { | |
2183 | /* The GV was and still is "empty", except that now | |
2184 | * it has the magic flags turned on, so we want it | |
2185 | * stored in the symtab. | |
2186 | */ | |
2187 | (void)hv_store(stash,name,len,(SV *)gv,0); | |
2188 | } | |
2189 | else { | |
2190 | /* Most likely the temporary GV created above */ | |
2191 | SvREFCNT_dec_NN(gv); | |
2192 | gv = NULL; | |
2193 | } | |
2194 | } | |
2195 | } | |
71c35c05 | 2196 | |
e6066781 | 2197 | if (gv) gv_init_svtype(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 | 2198 | return gv; |
79072805 LW |
2199 | } |
2200 | ||
2201 | void | |
35a4481c | 2202 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2203 | { |
ed60a868 | 2204 | const char *name; |
35a4481c | 2205 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
2206 | |
2207 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
2208 | ||
666ea192 | 2209 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 2210 | |
52a6327b | 2211 | if (hv && (name = HvNAME(hv))) { |
ed60a868 FC |
2212 | const STRLEN len = HvNAMELEN(hv); |
2213 | if (keepmain || strnNE(name, "main", len)) { | |
2214 | sv_catpvn_flags(sv,name,len,HvNAMEUTF8(hv)?SV_CATUTF8:SV_CATBYTES); | |
396482e1 | 2215 | sv_catpvs(sv,"::"); |
ed60a868 | 2216 | } |
43693395 | 2217 | } |
ed60a868 | 2218 | else sv_catpvs(sv,"__ANON__::"); |
04f3bf56 | 2219 | sv_catsv(sv,sv_2mortal(newSVhek(GvNAME_HEK(gv)))); |
43693395 GS |
2220 | } |
2221 | ||
2222 | void | |
35a4481c | 2223 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2224 | { |
099be4f1 | 2225 | const GV * const egv = GvEGVx(gv); |
7918f24d NC |
2226 | |
2227 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
2228 | ||
46c461b5 | 2229 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
2230 | } |
2231 | ||
79072805 | 2232 | void |
51da40ed | 2233 | Perl_gv_check(pTHX_ HV *stash) |
79072805 | 2234 | { |
97aff369 | 2235 | dVAR; |
eb578fdb | 2236 | I32 i; |
463ee0b2 | 2237 | |
7918f24d NC |
2238 | PERL_ARGS_ASSERT_GV_CHECK; |
2239 | ||
8990e307 LW |
2240 | if (!HvARRAY(stash)) |
2241 | return; | |
a0d0e21e | 2242 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 2243 | const HE *entry; |
51da40ed FC |
2244 | /* SvIsCOW is unused on HVs, so we can use it to mark stashes we |
2245 | are currently searching through recursively. */ | |
2246 | SvIsCOW_on(stash); | |
dc437b57 | 2247 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
eb578fdb | 2248 | GV *gv; |
b7787f18 | 2249 | HV *hv; |
dc437b57 | 2250 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
159b6efe | 2251 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 2252 | { |
51da40ed | 2253 | if (hv != PL_defstash && hv != stash && !SvIsCOW(hv)) |
a0d0e21e LW |
2254 | gv_check(hv); /* nested package */ |
2255 | } | |
ecad31f0 BF |
2256 | else if ( *HeKEY(entry) != '_' |
2257 | && isIDFIRST_lazy_if(HeKEY(entry), HeUTF8(entry)) ) { | |
e1ec3a88 | 2258 | const char *file; |
159b6efe | 2259 | gv = MUTABLE_GV(HeVAL(entry)); |
55d729e4 | 2260 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 2261 | continue; |
1d7c1841 | 2262 | file = GvFILE(gv); |
1d7c1841 | 2263 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1dc74fdb FC |
2264 | #ifdef USE_ITHREADS |
2265 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ | |
2266 | #else | |
2267 | CopFILEGV(PL_curcop) | |
2268 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
2269 | #endif | |
9014280d | 2270 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
d0c0e7dd FC |
2271 | "Name \"%"HEKf"::%"HEKf |
2272 | "\" used only once: possible typo", | |
2273 | HEKfARG(HvNAME_HEK(stash)), | |
2274 | HEKfARG(GvNAME_HEK(gv))); | |
463ee0b2 | 2275 | } |
79072805 | 2276 | } |
51da40ed | 2277 | SvIsCOW_off(stash); |
79072805 LW |
2278 | } |
2279 | } | |
2280 | ||
2281 | GV * | |
9cc50d5b | 2282 | Perl_newGVgen_flags(pTHX_ const char *pack, U32 flags) |
79072805 | 2283 | { |
97aff369 | 2284 | dVAR; |
9cc50d5b | 2285 | PERL_ARGS_ASSERT_NEWGVGEN_FLAGS; |
b17a0679 | 2286 | assert(!(flags & ~SVf_UTF8)); |
7918f24d | 2287 | |
b17a0679 FC |
2288 | return gv_fetchpv(Perl_form(aTHX_ "%"UTF8f"::_GEN_%ld", |
2289 | UTF8fARG(flags, strlen(pack), pack), | |
9cc50d5b BF |
2290 | (long)PL_gensym++), |
2291 | GV_ADD, SVt_PVGV); | |
79072805 LW |
2292 | } |
2293 | ||
2294 | /* hopefully this is only called on local symbol table entries */ | |
2295 | ||
2296 | GP* | |
864dbfa3 | 2297 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 2298 | { |
97aff369 | 2299 | dVAR; |
1d7c1841 | 2300 | if (!gp) |
d4c19fe8 | 2301 | return NULL; |
79072805 | 2302 | gp->gp_refcnt++; |
44a8e56a | 2303 | if (gp->gp_cv) { |
2304 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
2305 | /* If the GP they asked for a reference to contains |
2306 | a method cache entry, clear it first, so that we | |
2307 | don't infect them with our cached entry */ | |
e7881358 | 2308 | SvREFCNT_dec_NN(gp->gp_cv); |
601f1833 | 2309 | gp->gp_cv = NULL; |
44a8e56a | 2310 | gp->gp_cvgen = 0; |
2311 | } | |
44a8e56a | 2312 | } |
79072805 | 2313 | return gp; |
79072805 LW |
2314 | } |
2315 | ||
2316 | void | |
864dbfa3 | 2317 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 2318 | { |
97aff369 | 2319 | dVAR; |
79072805 | 2320 | GP* gp; |
b0d55c99 | 2321 | int attempts = 100; |
79072805 | 2322 | |
f7877b28 | 2323 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 2324 | return; |
f248d071 | 2325 | if (gp->gp_refcnt == 0) { |
9b387841 NC |
2326 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
2327 | "Attempt to free unreferenced glob pointers" | |
2328 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
2329 | return; |
2330 | } | |
748a9306 LW |
2331 | if (--gp->gp_refcnt > 0) { |
2332 | if (gp->gp_egv == gv) | |
2333 | gp->gp_egv = 0; | |
c43ae56f | 2334 | GvGP_set(gv, NULL); |
79072805 | 2335 | return; |
748a9306 | 2336 | } |
79072805 | 2337 | |
b0d55c99 FC |
2338 | while (1) { |
2339 | /* Copy and null out all the glob slots, so destructors do not see | |
2340 | freed SVs. */ | |
2341 | HEK * const file_hek = gp->gp_file_hek; | |
2342 | SV * const sv = gp->gp_sv; | |
2343 | AV * const av = gp->gp_av; | |
2344 | HV * const hv = gp->gp_hv; | |
2345 | IO * const io = gp->gp_io; | |
2346 | CV * const cv = gp->gp_cv; | |
2347 | CV * const form = gp->gp_form; | |
2348 | ||
2349 | gp->gp_file_hek = NULL; | |
2350 | gp->gp_sv = NULL; | |
2351 | gp->gp_av = NULL; | |
2352 | gp->gp_hv = NULL; | |
2353 | gp->gp_io = NULL; | |
2354 | gp->gp_cv = NULL; | |
2355 | gp->gp_form = NULL; | |
2356 | ||
2357 | if (file_hek) | |
2358 | unshare_hek(file_hek); | |
2359 | ||
2360 | SvREFCNT_dec(sv); | |
2361 | SvREFCNT_dec(av); | |
2362 | /* FIXME - another reference loop GV -> symtab -> GV ? | |
2363 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
2364 | if (hv && SvTYPE(hv) == SVt_PVHV) { | |
c2242065 | 2365 | const HEK *hvname_hek = HvNAME_HEK(hv); |
103f5a36 | 2366 | DEBUG_o(Perl_deb(aTHX_ "gp_free clearing PL_stashcache for '%"HEKf"'\n", hvname_hek)); |
c2242065 BF |
2367 | if (PL_stashcache && hvname_hek) |
2368 | (void)hv_delete(PL_stashcache, HEK_KEY(hvname_hek), | |
2369 | (HEK_UTF8(hvname_hek) ? -HEK_LEN(hvname_hek) : HEK_LEN(hvname_hek)), | |
2370 | G_DISCARD); | |
b0d55c99 FC |
2371 | SvREFCNT_dec(hv); |
2372 | } | |
2373 | SvREFCNT_dec(io); | |
2374 | SvREFCNT_dec(cv); | |
2375 | SvREFCNT_dec(form); | |
2376 | ||
2377 | if (!gp->gp_file_hek | |
2378 | && !gp->gp_sv | |
2379 | && !gp->gp_av | |
2380 | && !gp->gp_hv | |
2381 | && !gp->gp_io | |
2382 | && !gp->gp_cv | |
2383 | && !gp->gp_form) break; | |
2384 | ||
2385 | if (--attempts == 0) { | |
2386 | Perl_die(aTHX_ | |
2387 | "panic: gp_free failed to free glob pointer - " | |
2388 | "something is repeatedly re-creating entries" | |
2389 | ); | |
2390 | } | |
13207a71 | 2391 | } |
748a9306 | 2392 | |
79072805 | 2393 | Safefree(gp); |
c43ae56f | 2394 | GvGP_set(gv, NULL); |
79072805 LW |
2395 | } |
2396 | ||
d460ef45 NIS |
2397 | int |
2398 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
2399 | { | |
53c1dcc0 AL |
2400 | AMT * const amtp = (AMT*)mg->mg_ptr; |
2401 | PERL_UNUSED_ARG(sv); | |
dd374669 | 2402 | |
7918f24d NC |
2403 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
2404 | ||
d460ef45 NIS |
2405 | if (amtp && AMT_AMAGIC(amtp)) { |
2406 | int i; | |
2407 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 2408 | CV * const cv = amtp->table[i]; |
b37c2d43 | 2409 | if (cv) { |
e7881358 | 2410 | SvREFCNT_dec_NN(MUTABLE_SV(cv)); |
601f1833 | 2411 | amtp->table[i] = NULL; |
d460ef45 NIS |
2412 | } |
2413 | } | |
2414 | } | |
2415 | return 0; | |
2416 | } | |
2417 | ||
a0d0e21e | 2418 | /* Updates and caches the CV's */ |
c3a9a790 RGS |
2419 | /* Returns: |
2420 | * 1 on success and there is some overload | |
2421 | * 0 if there is no overload | |
2422 | * -1 if some error occurred and it couldn't croak | |
2423 | */ | |
a0d0e21e | 2424 | |
c3a9a790 | 2425 | int |
242f8760 | 2426 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e | 2427 | { |
97aff369 | 2428 | dVAR; |
ad64d0ec | 2429 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 | 2430 | AMT amt; |
9b439311 | 2431 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 2432 | U32 newgen; |
a0d0e21e | 2433 | |
7918f24d NC |
2434 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
2435 | ||
9b439311 | 2436 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
2437 | if (mg) { |
2438 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
66978156 | 2439 | if (amtp->was_ok_sub == newgen) { |
8c34e50d | 2440 | return AMT_AMAGIC(amtp) ? 1 : 0; |
14899595 | 2441 | } |
ad64d0ec | 2442 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 | 2443 | } |
a0d0e21e | 2444 | |
bfcb3514 | 2445 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 2446 | |
d460ef45 | 2447 | Zero(&amt,1,AMT); |
e1a479c5 | 2448 | amt.was_ok_sub = newgen; |
a6006777 | 2449 | amt.fallback = AMGfallNO; |
2450 | amt.flags = 0; | |
2451 | ||
a6006777 | 2452 | { |
8c34e50d FC |
2453 | int filled = 0; |
2454 | int i; | |
a6006777 | 2455 | |
3866ea3b | 2456 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 2457 | |
89ffc314 | 2458 | /* Try to find via inheritance. */ |
e6919483 | 2459 | GV *gv = gv_fetchmeth_pvn(stash, PL_AMG_names[0], 2, -1, 0); |
3866ea3b | 2460 | SV * const sv = gv ? GvSV(gv) : NULL; |
53c1dcc0 | 2461 | CV* cv; |
89ffc314 IZ |
2462 | |
2463 | if (!gv) | |
3866ea3b FC |
2464 | { |
2465 | if (!gv_fetchmeth_pvn(stash, "((", 2, -1, 0)) | |
8c34e50d | 2466 | goto no_table; |
3866ea3b FC |
2467 | } |
2468 | #ifdef PERL_DONT_CREATE_GVSV | |
2469 | else if (!sv) { | |
6f207bd3 | 2470 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
3866ea3b FC |
2471 | } |
2472 | #endif | |
79c9643d JL |
2473 | else if (SvTRUE(sv)) |
2474 | /* don't need to set overloading here because fallback => 1 | |
2475 | * is the default setting for classes without overloading */ | |
89ffc314 | 2476 | amt.fallback=AMGfallYES; |
79c9643d JL |
2477 | else if (SvOK(sv)) { |
2478 | amt.fallback=AMGfallNEVER; | |
386a5489 | 2479 | filled = 1; |
386a5489 | 2480 | } |
79c9643d | 2481 | else { |
386a5489 | 2482 | filled = 1; |
386a5489 | 2483 | } |
a6006777 | 2484 | |
8c34e50d | 2485 | for (i = 1; i < NofAMmeth; i++) { |
6136c704 | 2486 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 2487 | /* Human-readable form, for debugging: */ |
8c34e50d | 2488 | const char * const cp = AMG_id2name(i); |
d279ab82 | 2489 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 | 2490 | |
a0288114 | 2491 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 2492 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
2493 | /* don't fill the cache while looking up! |
2494 | Creation of inheritance stubs in intermediate packages may | |
2495 | conflict with the logic of runtime method substitution. | |
2496 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
2497 | then we could have created stubs for "(+0" in A and C too. | |
2498 | But if B overloads "bool", we may want to use it for | |
2499 | numifying instead of C's "+0". */ | |
8c34e50d | 2500 | gv = Perl_gv_fetchmeth_pvn(aTHX_ stash, cooky, l, -1, 0); |
46fc3d4c | 2501 | cv = 0; |
89ffc314 | 2502 | if (gv && (cv = GvCV(gv))) { |
f0e9f182 FC |
2503 | if(GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")){ |
2504 | const char * const hvname = HvNAME_get(GvSTASH(CvGV(cv))); | |
2505 | if (hvname && HEK_LEN(HvNAME_HEK(GvSTASH(CvGV(cv)))) == 8 | |
2506 | && strEQ(hvname, "overload")) { | |
611c1e95 IZ |
2507 | /* This is a hack to support autoloading..., while |
2508 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 2509 | /* GvSV contains the name of the method. */ |
6136c704 | 2510 | GV *ngv = NULL; |
c69033f2 | 2511 | SV *gvsv = GvSV(gv); |
a0288114 AL |
2512 | |
2513 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
2514 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
f0e9f182 | 2515 | (void*)GvSV(gv), cp, HvNAME(stash)) ); |
c69033f2 | 2516 | if (!gvsv || !SvPOK(gvsv) |
7f415459 | 2517 | || !(ngv = gv_fetchmethod_sv_flags(stash, gvsv, 0))) |
dc848c6f | 2518 | { |
a0288114 | 2519 | /* Can be an import stub (created by "can"). */ |
242f8760 | 2520 | if (destructing) { |
c3a9a790 | 2521 | return -1; |
242f8760 RGS |
2522 | } |
2523 | else { | |
d66cca07 BF |
2524 | const SV * const name = (gvsv && SvPOK(gvsv)) |
2525 | ? gvsv | |
2526 | : newSVpvs_flags("???", SVs_TEMP); | |
dcbac5bb | 2527 | /* diag_listed_as: Can't resolve method "%s" overloading "%s" in package "%s" */ |
d66cca07 BF |
2528 | Perl_croak(aTHX_ "%s method \"%"SVf256 |
2529 | "\" overloading \"%s\" "\ | |
d0c0e7dd | 2530 | "in package \"%"HEKf256"\"", |
242f8760 RGS |
2531 | (GvCVGEN(gv) ? "Stub found while resolving" |
2532 | : "Can't resolve"), | |
d66cca07 | 2533 | SVfARG(name), cp, |
d0c0e7dd | 2534 | HEKfARG( |
d66cca07 | 2535 | HvNAME_HEK(stash) |
d0c0e7dd | 2536 | )); |
242f8760 | 2537 | } |
44a8e56a | 2538 | } |
dc848c6f | 2539 | cv = GvCV(gv = ngv); |
f0e9f182 | 2540 | } |
44a8e56a | 2541 | } |
b464bac0 | 2542 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 2543 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 2544 | GvNAME(CvGV(cv))) ); |
2545 | filled = 1; | |
611c1e95 | 2546 | } else if (gv) { /* Autoloaded... */ |
ea726b52 | 2547 | cv = MUTABLE_CV(gv); |
611c1e95 | 2548 | filled = 1; |
44a8e56a | 2549 | } |
ea726b52 | 2550 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); |
a0d0e21e | 2551 | } |
a0d0e21e | 2552 | if (filled) { |
a6006777 | 2553 | AMT_AMAGIC_on(&amt); |
ad64d0ec | 2554 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2555 | (char*)&amt, sizeof(AMT)); |
8c34e50d | 2556 | return TRUE; |
a0d0e21e LW |
2557 | } |
2558 | } | |
a6006777 | 2559 | /* Here we have no table: */ |
8c34e50d | 2560 | no_table: |
a6006777 | 2561 | AMT_AMAGIC_off(&amt); |
ad64d0ec | 2562 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2563 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 | 2564 | return 0; |
a0d0e21e LW |
2565 | } |
2566 | ||
32251b26 IZ |
2567 | |
2568 | CV* | |
2569 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
2570 | { | |
97aff369 | 2571 | dVAR; |
3f8f4626 | 2572 | MAGIC *mg; |
32251b26 | 2573 | AMT *amtp; |
e1a479c5 | 2574 | U32 newgen; |
9b439311 | 2575 | struct mro_meta* stash_meta; |
32251b26 | 2576 | |
bfcb3514 | 2577 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 2578 | return NULL; |
e1a479c5 | 2579 | |
9b439311 BB |
2580 | stash_meta = HvMROMETA(stash); |
2581 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 2582 | |
ad64d0ec | 2583 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
2584 | if (!mg) { |
2585 | do_update: | |
8c34e50d | 2586 | if (Gv_AMupdate(stash, 0) == -1) |
242f8760 | 2587 | return NULL; |
ad64d0ec | 2588 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 | 2589 | } |
a9fd4e40 | 2590 | assert(mg); |
32251b26 | 2591 | amtp = (AMT*)mg->mg_ptr; |
66978156 | 2592 | if ( amtp->was_ok_sub != newgen ) |
32251b26 | 2593 | goto do_update; |
3ad83ce7 | 2594 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 2595 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
2596 | if (ret && isGV(ret)) { /* Autoloading stab */ |
2597 | /* Passing it through may have resulted in a warning | |
2598 | "Inherited AUTOLOAD for a non-method deprecated", since | |
2599 | our caller is going through a function call, not a method call. | |
2600 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 2601 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
2602 | |
2603 | if (gv && GvCV(gv)) | |
2604 | return GvCV(gv); | |
2605 | } | |
2606 | return ret; | |
2607 | } | |
a0288114 | 2608 | |
601f1833 | 2609 | return NULL; |
32251b26 IZ |
2610 | } |
2611 | ||
2612 | ||
6f1401dc DM |
2613 | /* Implement tryAMAGICun_MG macro. |
2614 | Do get magic, then see if the stack arg is overloaded and if so call it. | |
2615 | Flags: | |
2616 | AMGf_set return the arg using SETs rather than assigning to | |
2617 | the targ | |
2618 | AMGf_numeric apply sv_2num to the stack arg. | |
2619 | */ | |
2620 | ||
2621 | bool | |
2622 | Perl_try_amagic_un(pTHX_ int method, int flags) { | |
2623 | dVAR; | |
2624 | dSP; | |
2625 | SV* tmpsv; | |
2626 | SV* const arg = TOPs; | |
2627 | ||
2628 | SvGETMAGIC(arg); | |
2629 | ||
9f8bf298 NC |
2630 | if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method, |
2631 | AMGf_noright | AMGf_unary))) { | |
6f1401dc DM |
2632 | if (flags & AMGf_set) { |
2633 | SETs(tmpsv); | |
2634 | } | |
2635 | else { | |
2636 | dTARGET; | |
2637 | if (SvPADMY(TARG)) { | |
2638 | sv_setsv(TARG, tmpsv); | |
2639 | SETTARG; | |
2640 | } | |
2641 | else | |
2642 | SETs(tmpsv); | |
2643 | } | |
2644 | PUTBACK; | |
2645 | return TRUE; | |
2646 | } | |
2647 | ||
2648 | if ((flags & AMGf_numeric) && SvROK(arg)) | |
2649 | *sp = sv_2num(arg); | |
2650 | return FALSE; | |
2651 | } | |
2652 | ||
2653 | ||
2654 | /* Implement tryAMAGICbin_MG macro. | |
2655 | Do get magic, then see if the two stack args are overloaded and if so | |
2656 | call it. | |
2657 | Flags: | |
2658 | AMGf_set return the arg using SETs rather than assigning to | |
2659 | the targ | |
2660 | AMGf_assign op may be called as mutator (eg +=) | |
2661 | AMGf_numeric apply sv_2num to the stack arg. | |
2662 | */ | |
2663 | ||
2664 | bool | |
2665 | Perl_try_amagic_bin(pTHX_ int method, int flags) { | |
2666 | dVAR; | |
2667 | dSP; | |
2668 | SV* const left = TOPm1s; | |
2669 | SV* const right = TOPs; | |
2670 | ||
2671 | SvGETMAGIC(left); | |
2672 | if (left != right) | |
2673 | SvGETMAGIC(right); | |
2674 | ||
2675 | if (SvAMAGIC(left) || SvAMAGIC(right)) { | |
2676 | SV * const tmpsv = amagic_call(left, right, method, | |
2677 | ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0)); | |
2678 | if (tmpsv) { | |
2679 | if (flags & AMGf_set) { | |
2680 | (void)POPs; | |
2681 | SETs(tmpsv); | |
2682 | } | |
2683 | else { | |
2684 | dATARGET; | |
2685 | (void)POPs; | |
2686 | if (opASSIGN || SvPADMY(TARG)) { | |
2687 | sv_setsv(TARG, tmpsv); | |
2688 | SETTARG; | |
2689 | } | |
2690 | else | |
2691 | SETs(tmpsv); | |
2692 | } | |
2693 | PUTBACK; | |
2694 | return TRUE; | |
2695 | } | |
2696 | } | |
75ea7a12 FC |
2697 | if(left==right && SvGMAGICAL(left)) { |
2698 | SV * const left = sv_newmortal(); | |
2699 | *(sp-1) = left; | |
2700 | /* Print the uninitialized warning now, so it includes the vari- | |
2701 | able name. */ | |
2702 | if (!SvOK(right)) { | |
2703 | if (ckWARN(WARN_UNINITIALIZED)) report_uninit(right); | |
2704 | sv_setsv_flags(left, &PL_sv_no, 0); | |
2705 | } | |
2706 | else sv_setsv_flags(left, right, 0); | |
2707 | SvGETMAGIC(right); | |
2708 | } | |
6f1401dc | 2709 | if (flags & AMGf_numeric) { |
75ea7a12 FC |
2710 | if (SvROK(TOPm1s)) |
2711 | *(sp-1) = sv_2num(TOPm1s); | |
6f1401dc DM |
2712 | if (SvROK(right)) |
2713 | *sp = sv_2num(right); | |
2714 | } | |
2715 | return FALSE; | |
2716 | } | |
2717 | ||
25a9ffce NC |
2718 | SV * |
2719 | Perl_amagic_deref_call(pTHX_ SV *ref, int method) { | |
2720 | SV *tmpsv = NULL; | |
2721 | ||
2722 | PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL; | |
2723 | ||
2724 | while (SvAMAGIC(ref) && | |
2725 | (tmpsv = amagic_call(ref, &PL_sv_undef, method, | |
2726 | AMGf_noright | AMGf_unary))) { | |
2727 | if (!SvROK(tmpsv)) | |
2728 | Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); | |
2729 | if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) { | |
2730 | /* Bail out if it returns us the same reference. */ | |
2731 | return tmpsv; | |
2732 | } | |
2733 | ref = tmpsv; | |
2734 | } | |
2735 | return tmpsv ? tmpsv : ref; | |
2736 | } | |
6f1401dc | 2737 | |
8d569291 FC |
2738 | bool |
2739 | Perl_amagic_is_enabled(pTHX_ int method) | |
2740 | { | |
2741 | SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0); | |
2742 | ||
2743 | assert(PL_curcop->cop_hints & HINT_NO_AMAGIC); | |
2744 | ||
2745 | if ( !lex_mask || !SvOK(lex_mask) ) | |
2746 | /* overloading lexically disabled */ | |
2747 | return FALSE; | |
2748 | else if ( lex_mask && SvPOK(lex_mask) ) { | |
2749 | /* we have an entry in the hints hash, check if method has been | |
2750 | * masked by overloading.pm */ | |
2751 | STRLEN len; | |
2752 | const int offset = method / 8; | |
2753 | const int bit = method % 8; | |
2754 | char *pv = SvPV(lex_mask, len); | |
2755 | ||
2756 | /* Bit set, so this overloading operator is disabled */ | |
2757 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) | |
2758 | return FALSE; | |
2759 | } | |
2760 | return TRUE; | |
2761 | } | |
2762 | ||
a0d0e21e | 2763 | SV* |
864dbfa3 | 2764 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 2765 | { |
27da23d5 | 2766 | dVAR; |
b267980d | 2767 | MAGIC *mg; |
9c5ffd7c | 2768 | CV *cv=NULL; |
a0d0e21e | 2769 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 2770 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
2771 | int off = 0, off1, lr = 0, notfound = 0; |
2772 | int postpr = 0, force_cpy = 0; | |
2773 | int assign = AMGf_assign & flags; | |
2774 | const int assignshift = assign ? 1 : 0; | |
bf5522a1 | 2775 | int use_default_op = 0; |
67288365 | 2776 | int force_scalar = 0; |
497b47a8 JH |
2777 | #ifdef DEBUGGING |
2778 | int fl=0; | |
497b47a8 | 2779 | #endif |
25716404 | 2780 | HV* stash=NULL; |
7918f24d NC |
2781 | |
2782 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
2783 | ||
e46c382e | 2784 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
8d569291 | 2785 | if (!amagic_is_enabled(method)) return NULL; |
e46c382e YK |
2786 | } |
2787 | ||
a0d0e21e | 2788 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
0a2c84ab | 2789 | && (stash = SvSTASH(SvRV(left))) && Gv_AMG(stash) |
ad64d0ec | 2790 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 2791 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 2792 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 2793 | : NULL)) |
b267980d | 2794 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
2795 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
2796 | * usual method */ | |
497b47a8 JH |
2797 | ( |
2798 | #ifdef DEBUGGING | |
2799 | fl = 1, | |
a0288114 | 2800 | #endif |
497b47a8 | 2801 | cv = cvp[off=method])))) { |
a0d0e21e LW |
2802 | lr = -1; /* Call method for left argument */ |
2803 | } else { | |
2804 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
2805 | int logic; | |
2806 | ||
2807 | /* look for substituted methods */ | |
ee239bfe | 2808 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
2809 | switch (method) { |
2810 | case inc_amg: | |
ee239bfe IZ |
2811 | force_cpy = 1; |
2812 | if ((cv = cvp[off=add_ass_amg]) | |
2813 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 2814 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
2815 | } |
2816 | break; | |
2817 | case dec_amg: | |
ee239bfe IZ |
2818 | force_cpy = 1; |
2819 | if ((cv = cvp[off = subtr_ass_amg]) | |
2820 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 2821 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
2822 | } |
2823 | break; | |
2824 | case bool__amg: | |
2825 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
2826 | break; | |
2827 | case numer_amg: | |
2828 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
2829 | break; | |
2830 | case string_amg: | |
2831 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
2832 | break; | |
b7787f18 AL |
2833 | case not_amg: |
2834 | (void)((cv = cvp[off=bool__amg]) | |
2835 | || (cv = cvp[off=numer_amg]) | |
2836 | || (cv = cvp[off=string_amg])); | |
2ab54efd MB |
2837 | if (cv) |
2838 | postpr = 1; | |
b7787f18 | 2839 | break; |
748a9306 LW |
2840 | case copy_amg: |
2841 | { | |
76e3520e GS |
2842 | /* |
2843 | * SV* ref causes confusion with the interpreter variable of | |
2844 | * the same name | |
2845 | */ | |
890ce7af | 2846 | SV* const tmpRef=SvRV(left); |
76e3520e | 2847 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 2848 | /* |
2849 | * Just to be extra cautious. Maybe in some | |
2850 | * additional cases sv_setsv is safe, too. | |
2851 | */ | |
890ce7af | 2852 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 2853 | SvOBJECT_on(newref); |
a1cd65be FC |
2854 | /* No need to do SvAMAGIC_on here, as SvAMAGIC macros |
2855 | delegate to the stash. */ | |
85fbaab2 | 2856 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); |
748a9306 LW |
2857 | return newref; |
2858 | } | |
2859 | } | |
2860 | break; | |
a0d0e21e | 2861 | case abs_amg: |
b267980d | 2862 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 2863 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 2864 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 2865 | if (off1==lt_amg) { |
890ce7af | 2866 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
2867 | lt_amg,AMGf_noright); |
2868 | logic = SvTRUE(lessp); | |
2869 | } else { | |
890ce7af | 2870 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
2871 | ncmp_amg,AMGf_noright); |
2872 | logic = (SvNV(lessp) < 0); | |
2873 | } | |
2874 | if (logic) { | |
2875 | if (off==subtr_amg) { | |
2876 | right = left; | |
748a9306 | 2877 | left = nullsv; |
a0d0e21e LW |
2878 | lr = 1; |
2879 | } | |
2880 | } else { | |
2881 | return left; | |
2882 | } | |
2883 | } | |
2884 | break; | |
2885 | case neg_amg: | |
155aba94 | 2886 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
2887 | right = left; |
2888 | left = sv_2mortal(newSViv(0)); | |
2889 | lr = 1; | |
2890 | } | |
2891 | break; | |
f216259d | 2892 | case int_amg: |
f5284f61 | 2893 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
c4c7412c | 2894 | case ftest_amg: /* XXXX Eventually should do to_gv. */ |
d4b87e75 | 2895 | case regexp_amg: |
b267980d NIS |
2896 | /* FAIL safe */ |
2897 | return NULL; /* Delegate operation to standard mechanisms. */ | |
2898 | break; | |
f5284f61 IZ |
2899 | case to_sv_amg: |
2900 | case to_av_amg: | |
2901 | case to_hv_amg: | |
2902 | case to_gv_amg: | |
2903 | case to_cv_amg: | |
2904 | /* FAIL safe */ | |
b267980d | 2905 | return left; /* Delegate operation to standard mechanisms. */ |
f5284f61 | 2906 | break; |
a0d0e21e LW |
2907 | default: |
2908 | goto not_found; | |
2909 | } | |
2910 | if (!cv) goto not_found; | |
2911 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
0a2c84ab | 2912 | && (stash = SvSTASH(SvRV(right))) && Gv_AMG(stash) |
ad64d0ec | 2913 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 2914 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 2915 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 2916 | : NULL)) |
69815d08 RS |
2917 | && (cv = cvp[off=method])) { /* Method for right |
2918 | * argument found */ | |
2919 | lr=1; | |
bf5522a1 MB |
2920 | } else if (((cvp && amtp->fallback > AMGfallNEVER) |
2921 | || (ocvp && oamtp->fallback > AMGfallNEVER)) | |
a0d0e21e LW |
2922 | && !(flags & AMGf_unary)) { |
2923 | /* We look for substitution for | |
2924 | * comparison operations and | |
fc36a67e | 2925 | * concatenation */ |
a0d0e21e LW |
2926 | if (method==concat_amg || method==concat_ass_amg |
2927 | || method==repeat_amg || method==repeat_ass_amg) { | |
2928 | return NULL; /* Delegate operation to string conversion */ | |
2929 | } | |
2930 | off = -1; | |
2931 | switch (method) { | |
2932 | case lt_amg: | |
2933 | case le_amg: | |
2934 | case gt_amg: | |
2935 | case ge_amg: | |
2936 | case eq_amg: | |
2937 | case ne_amg: | |
2ab54efd MB |
2938 | off = ncmp_amg; |
2939 | break; | |
a0d0e21e LW |
2940 | case slt_amg: |
2941 | case sle_amg: | |
2942 | case sgt_amg: | |
2943 | case sge_amg: | |
2944 | case seq_amg: | |
2945 | case sne_amg: | |
2ab54efd MB |
2946 | off = scmp_amg; |
2947 | break; | |
a0d0e21e | 2948 | } |
bf5522a1 MB |
2949 | if (off != -1) { |
2950 | if (ocvp && (oamtp->fallback > AMGfallNEVER)) { | |
2951 | cv = ocvp[off]; | |
2952 | lr = -1; | |
2953 | } | |
2954 | if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) { | |
2955 | cv = cvp[off]; | |
2956 | lr = 1; | |
2957 | } | |
2958 | } | |
2959 | if (cv) | |
2ab54efd MB |
2960 | postpr = 1; |
2961 | else | |
2962 | goto not_found; | |
a0d0e21e | 2963 | } else { |
a6006777 | 2964 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
2965 | switch (method) { |
2966 | case to_sv_amg: | |
2967 | case to_av_amg: | |
2968 | case to_hv_amg: | |
2969 | case to_gv_amg: | |
2970 | case to_cv_amg: | |
2971 | /* FAIL safe */ | |
2972 | return left; /* Delegate operation to standard mechanisms. */ | |
2973 | break; | |
2974 | } | |
a0d0e21e LW |
2975 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
2976 | notfound = 1; lr = -1; | |
2977 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
2978 | notfound = 1; lr = 1; | |
bf5522a1 MB |
2979 | } else if ((use_default_op = |
2980 | (!ocvp || oamtp->fallback >= AMGfallYES) | |
2981 | && (!cvp || amtp->fallback >= AMGfallYES)) | |
2982 | && !DEBUG_o_TEST) { | |
4cc0ca18 NC |
2983 | /* Skip generating the "no method found" message. */ |
2984 | return NULL; | |
a0d0e21e | 2985 | } else { |
46fc3d4c | 2986 | SV *msg; |
774d564b | 2987 | if (off==-1) off=method; |
b267980d | 2988 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
d66cca07 BF |
2989 | "Operation \"%s\": no method found,%sargument %s%"SVf"%s%"SVf, |
2990 | AMG_id2name(method + assignshift), | |
2991 | (flags & AMGf_unary ? " " : "\n\tleft "), | |
2992 | SvAMAGIC(left)? | |
2993 | "in overloaded package ": | |
2994 | "has no overloaded magic", | |
2995 | SvAMAGIC(left)? | |
2996 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(left)))))): | |
2997 | SVfARG(&PL_sv_no), | |
2998 | SvAMAGIC(right)? | |
2999 | ",\n\tright argument in overloaded package ": | |
3000 | (flags & AMGf_unary | |
3001 | ? "" | |
3002 | : ",\n\tright argument has no overloaded magic"), | |
3003 | SvAMAGIC(right)? | |
3004 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(right)))))): | |
3005 | SVfARG(&PL_sv_no))); | |
bf5522a1 | 3006 | if (use_default_op) { |
d66cca07 | 3007 | DEBUG_o( Perl_deb(aTHX_ "%"SVf, SVfARG(msg)) ); |
a0d0e21e | 3008 | } else { |
be2597df | 3009 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e LW |
3010 | } |
3011 | return NULL; | |
3012 | } | |
ee239bfe | 3013 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
3014 | } |
3015 | } | |
67288365 JL |
3016 | |
3017 | switch (method) { | |
3018 | /* in these cases, we're calling '+' or '-' as a fallback for a ++ or -- | |
3019 | * operation. we need this to return a value, so that it can be assigned | |
3020 | * later on, in the postpr block (case inc_amg/dec_amg), even if the | |
3021 | * increment or decrement was itself called in void context */ | |
3022 | case inc_amg: | |
3023 | if (off == add_amg) | |
3024 | force_scalar = 1; | |
3025 | break; | |
3026 | case dec_amg: | |
3027 | if (off == subtr_amg) | |
3028 | force_scalar = 1; | |
3029 | break; | |
3030 | /* in these cases, we're calling an assignment variant of an operator | |
3031 | * (+= rather than +, for instance). regardless of whether it's a | |
3032 | * fallback or not, it always has to return a value, which will be | |
3033 | * assigned to the proper variable later */ | |
3034 | case add_amg: | |
3035 | case subtr_amg: | |
3036 | case mult_amg: | |
3037 | case div_amg: | |
3038 | case modulo_amg: | |
3039 | case pow_amg: | |
3040 | case lshift_amg: | |
3041 | case rshift_amg: | |
3042 | case repeat_amg: | |
3043 | case concat_amg: | |
3044 | case band_amg: | |
3045 | case bor_amg: | |
3046 | case bxor_amg: | |
3047 | if (assign) | |
3048 | force_scalar = 1; | |
3049 | break; | |
3050 | /* the copy constructor always needs to return a value */ | |
3051 | case copy_amg: | |
3052 | force_scalar = 1; | |
3053 | break; | |
3054 | /* because of the way these are implemented (they don't perform the | |
3055 | * dereferencing themselves, they return a reference that perl then | |
3056 | * dereferences later), they always have to be in scalar context */ | |
3057 | case to_sv_amg: | |
3058 | case to_av_amg: | |
3059 | case to_hv_amg: | |
3060 | case to_gv_amg: | |
3061 | case to_cv_amg: | |
3062 | force_scalar = 1; | |
3063 | break; | |
3064 | /* these don't have an op of their own; they're triggered by their parent | |
3065 | * op, so the context there isn't meaningful ('$a and foo()' in void | |
3066 | * context still needs to pass scalar context on to $a's bool overload) */ | |
3067 | case bool__amg: | |
3068 | case numer_amg: | |
3069 | case string_amg: | |
3070 | force_scalar = 1; | |
3071 | break; | |
3072 | } | |
3073 | ||
497b47a8 | 3074 | #ifdef DEBUGGING |
a0d0e21e | 3075 | if (!notfound) { |
497b47a8 | 3076 | DEBUG_o(Perl_deb(aTHX_ |
d66cca07 | 3077 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %"SVf"%s\n", |
497b47a8 JH |
3078 | AMG_id2name(off), |
3079 | method+assignshift==off? "" : | |
a0288114 | 3080 | " (initially \"", |
497b47a8 JH |
3081 | method+assignshift==off? "" : |
3082 | AMG_id2name(method+assignshift), | |
a0288114 | 3083 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
3084 | flags & AMGf_unary? "" : |
3085 | lr==1 ? " for right argument": " for left argument", | |
3086 | flags & AMGf_unary? " for argument" : "", | |
d66cca07 | 3087 | stash ? SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(stash)))) : SVfARG(newSVpvs_flags("null", SVs_TEMP)), |
497b47a8 | 3088 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 3089 | } |
497b47a8 | 3090 | #endif |
748a9306 LW |
3091 | /* Since we use shallow copy during assignment, we need |
3092 | * to dublicate the contents, probably calling user-supplied | |
3093 | * version of copy operator | |
3094 | */ | |
ee239bfe IZ |
3095 | /* We need to copy in following cases: |
3096 | * a) Assignment form was called. | |
3097 | * assignshift==1, assign==T, method + 1 == off | |
3098 | * b) Increment or decrement, called directly. | |
3099 | * assignshift==0, assign==0, method + 0 == off | |
3100 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 3101 | * assignshift==0, assign==T, |
ee239bfe IZ |
3102 | * force_cpy == T |
3103 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 3104 | * assignshift==0, assign==0, |
ee239bfe IZ |
3105 | * force_cpy == T |
3106 | * e) Assignment form translated to nomethod. | |
3107 | * assignshift==1, assign==T, method + 1 != off | |
3108 | * force_cpy == T | |
3109 | */ | |
3110 | /* off is method, method+assignshift, or a result of opcode substitution. | |
3111 | * In the latter case assignshift==0, so only notfound case is important. | |
3112 | */ | |
73512201 | 3113 | if ( (lr == -1) && ( ( (method + assignshift == off) |
ee239bfe | 3114 | && (assign || (method == inc_amg) || (method == dec_amg))) |
73512201 | 3115 | || force_cpy) ) |
6f1401dc | 3116 | { |
1b38c28e NC |
3117 | /* newSVsv does not behave as advertised, so we copy missing |
3118 | * information by hand */ | |
3119 | SV *tmpRef = SvRV(left); | |
3120 | SV *rv_copy; | |
31d632c3 | 3121 | if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) { |
1b38c28e NC |
3122 | SvRV_set(left, rv_copy); |
3123 | SvSETMAGIC(left); | |
e7881358 | 3124 | SvREFCNT_dec_NN(tmpRef); |
1b38c28e | 3125 | } |
6f1401dc DM |
3126 | } |
3127 | ||
a0d0e21e LW |
3128 | { |
3129 | dSP; | |
3130 | BINOP myop; | |
3131 | SV* res; | |
b7787f18 | 3132 | const bool oldcatch = CATCH_GET; |
67288365 JL |
3133 | I32 oldmark, nret; |
3134 | int gimme = force_scalar ? G_SCALAR : GIMME_V; | |
a0d0e21e | 3135 | |
54310121 | 3136 | CATCH_SET(TRUE); |
a0d0e21e LW |
3137 | Zero(&myop, 1, BINOP); |
3138 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 3139 | myop.op_next = NULL; |
67288365 JL |
3140 | myop.op_flags = OPf_STACKED; |
3141 | ||
3142 | switch (gimme) { | |
3143 | case G_VOID: | |
3144 | myop.op_flags |= OPf_WANT_VOID; | |
3145 | break; | |
3146 | case G_ARRAY: | |
3147 | if (flags & AMGf_want_list) { | |
3148 | myop.op_flags |= OPf_WANT_LIST; | |
3149 | break; | |
3150 | } | |
3151 | /* FALLTHROUGH */ | |
3152 | default: | |
3153 | myop.op_flags |= OPf_WANT_SCALAR; | |
3154 | break; | |
3155 | } | |
a0d0e21e | 3156 | |
e788e7d3 | 3157 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 3158 | ENTER; |
462e5cf6 | 3159 | SAVEOP(); |
533c011a | 3160 | PL_op = (OP *) &myop; |
3280af22 | 3161 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 3162 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 3163 | PUTBACK; |
897d3989 | 3164 | Perl_pp_pushmark(aTHX); |
a0d0e21e | 3165 | |
924508f0 | 3166 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
3167 | PUSHs(lr>0? right: left); |
3168 | PUSHs(lr>0? left: right); | |
3280af22 | 3169 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 3170 | if (notfound) { |
59cd0e26 NC |
3171 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
3172 | AMG_id2namelen(method + assignshift), SVs_TEMP)); | |
a0d0e21e | 3173 | } |
ad64d0ec | 3174 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e | 3175 | PUTBACK; |
67288365 | 3176 | oldmark = TOPMARK; |
a0d0e21e | 3177 | |
139d0ce6 | 3178 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 | 3179 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
3180 | LEAVE; |
3181 | SPAGAIN; | |
67288365 JL |
3182 | nret = SP - (PL_stack_base + oldmark); |
3183 | ||
3184 | switch (gimme) { | |
3185 | case G_VOID: | |
3186 | /* returning NULL has another meaning, and we check the context | |
3187 | * at the call site too, so this can be differentiated from the | |
3188 | * scalar case */ | |
3189 | res = &PL_sv_undef; | |
3190 | SP = PL_stack_base + oldmark; | |
3191 | break; | |
3192 | case G_ARRAY: { | |
3193 | if (flags & AMGf_want_list) { | |
3194 | res = sv_2mortal((SV *)newAV()); | |
3195 | av_extend((AV *)res, nret); | |
3196 | while (nret--) | |
3197 | av_store((AV *)res, nret, POPs); | |
3198 | break; | |
3199 | } | |
3200 | /* FALLTHROUGH */ | |
3201 | } | |
3202 | default: | |
3203 | res = POPs; | |
3204 | break; | |
3205 | } | |
a0d0e21e | 3206 | |
ebafeae7 | 3207 | PUTBACK; |
d3acc0f7 | 3208 | POPSTACK; |
54310121 | 3209 | CATCH_SET(oldcatch); |
a0d0e21e | 3210 | |
a0d0e21e | 3211 | if (postpr) { |
b7787f18 | 3212 | int ans; |
a0d0e21e LW |
3213 | switch (method) { |
3214 | case le_amg: | |
3215 | case sle_amg: | |
3216 | ans=SvIV(res)<=0; break; | |
3217 | case lt_amg: | |
3218 | case slt_amg: | |
3219 | ans=SvIV(res)<0; break; | |
3220 | case ge_amg: | |
3221 | case sge_amg: | |
3222 | ans=SvIV(res)>=0; break; | |
3223 | case gt_amg: | |
3224 | case sgt_amg: | |
3225 | ans=SvIV(res)>0; break; | |
3226 | case eq_amg: | |
3227 | case seq_amg: | |
3228 | ans=SvIV(res)==0; break; | |
3229 | case ne_amg: | |
3230 | case sne_amg: | |
3231 | ans=SvIV(res)!=0; break; | |
3232 | case inc_amg: | |
3233 | case dec_amg: | |
bbce6d69 | 3234 | SvSetSV(left,res); return left; |
dc437b57 | 3235 | case not_amg: |
fe7ac86a | 3236 | ans=!SvTRUE(res); break; |
b7787f18 AL |
3237 | default: |
3238 | ans=0; break; | |
a0d0e21e | 3239 | } |
54310121 | 3240 | return boolSV(ans); |
748a9306 LW |
3241 | } else if (method==copy_amg) { |
3242 | if (!SvROK(res)) { | |
cea2e8a9 | 3243 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
3244 | } |
3245 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
3246 | } else { |
3247 | return res; | |
3248 | } | |
3249 | } | |
3250 | } | |
c9d5ac95 | 3251 | |
f5c1e807 NC |
3252 | void |
3253 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
3254 | { | |
3255 | dVAR; | |
acda4c6a | 3256 | U32 hash; |
f5c1e807 | 3257 | |
7918f24d | 3258 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 | 3259 | |
acda4c6a NC |
3260 | if (len > I32_MAX) |
3261 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); | |
3262 | ||
ae8cc45f NC |
3263 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
3264 | unshare_hek(GvNAME_HEK(gv)); | |
3265 | } | |
3266 | ||
acda4c6a | 3267 | PERL_HASH(hash, name, len); |
c60dbbc3 | 3268 | GvNAME_HEK(gv) = share_hek(name, (flags & SVf_UTF8 ? -(I32)len : (I32)len), hash); |
f5c1e807 NC |
3269 | } |
3270 | ||
66610fdd | 3271 | /* |
f7461760 Z |
3272 | =for apidoc gv_try_downgrade |
3273 | ||
2867cdbc Z |
3274 | If the typeglob C<gv> can be expressed more succinctly, by having |
3275 | something other than a real GV in its place in the stash, replace it | |
3276 | with the optimised form. Basic requirements for this are that C<gv> | |
3277 | is a real typeglob, is sufficiently ordinary, and is only referenced | |
3278 | from its package. This function is meant to be used when a GV has been | |
3279 | looked up in part to see what was there, causing upgrading, but based | |
3280 | on what was found it turns out that the real GV isn't required after all. | |
3281 | ||
3282 | If C<gv> is a completely empty typeglob, it is deleted from the stash. | |
3283 | ||
3284 | If C<gv> is a typeglob containing only a sufficiently-ordinary constant | |
3285 | sub, the typeglob is replaced with a scalar-reference placeholder that | |
3286 | more compactly represents the same thing. | |
f7461760 Z |
3287 | |
3288 | =cut | |
3289 | */ | |
3290 | ||
3291 | void | |
3292 | Perl_gv_try_downgrade(pTHX_ GV *gv) | |
3293 | { | |
3294 | HV *stash; | |
3295 | CV *cv; | |
3296 | HEK *namehek; | |
3297 | SV **gvp; | |
3298 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; | |
95f56751 FC |
3299 | |
3300 | /* XXX Why and where does this leave dangling pointers during global | |
3301 | destruction? */ | |
627364f1 | 3302 | if (PL_phase == PERL_PHASE_DESTRUCT) return; |
95f56751 | 3303 | |
2867cdbc | 3304 | if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
803f2748 | 3305 | !SvOBJECT(gv) && !SvREADONLY(gv) && |
f7461760 | 3306 | isGV_with_GP(gv) && GvGP(gv) && |
2867cdbc | 3307 | !GvINTRO(gv) && GvREFCNT(gv) == 1 && |
f7461760 | 3308 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && |
099be4f1 | 3309 | GvEGVx(gv) == gv && (stash = GvSTASH(gv)))) |
2867cdbc | 3310 | return; |
803f2748 DM |
3311 | if (SvMAGICAL(gv)) { |
3312 | MAGIC *mg; | |
3313 | /* only backref magic is allowed */ | |
3314 | if (SvGMAGICAL(gv) || SvSMAGICAL(gv)) | |
3315 | return; | |
3316 | for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) { | |
3317 | if (mg->mg_type != PERL_MAGIC_backref) | |
3318 | return; | |
3319 | } | |
3320 | } | |
2867cdbc Z |
3321 | cv = GvCV(gv); |
3322 | if (!cv) { | |
3323 | HEK *gvnhek = GvNAME_HEK(gv); | |
3324 | (void)hv_delete(stash, HEK_KEY(gvnhek), | |
3325 | HEK_UTF8(gvnhek) ? -HEK_LEN(gvnhek) : HEK_LEN(gvnhek), G_DISCARD); | |
3326 | } else if (GvMULTI(gv) && cv && | |
f7461760 Z |
3327 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
3328 | CvSTASH(cv) == stash && CvGV(cv) == gv && | |
3329 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && | |
3330 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && | |
3331 | (namehek = GvNAME_HEK(gv)) && | |
3332 | (gvp = hv_fetch(stash, HEK_KEY(namehek), | |
3333 | HEK_LEN(namehek)*(HEK_UTF8(namehek) ? -1 : 1), 0)) && | |
3334 | *gvp == (SV*)gv) { | |
3335 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); | |
70e5f2b5 | 3336 | const bool imported = !!GvIMPORTED_CV(gv); |
f7461760 Z |
3337 | SvREFCNT(gv) = 0; |
3338 | sv_clear((SV*)gv); | |
3339 | SvREFCNT(gv) = 1; | |
70e5f2b5 | 3340 | SvFLAGS(gv) = SVt_IV|SVf_ROK|SVprv_PCS_IMPORTED * imported; |
f7461760 Z |
3341 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - |
3342 | STRUCT_OFFSET(XPVIV, xiv_iv)); | |
3343 | SvRV_set(gv, value); | |
3344 | } | |
3345 | } | |
3346 | ||
4aaa4757 FC |
3347 | #include "XSUB.h" |
3348 | ||
3349 | static void | |
3350 | core_xsub(pTHX_ CV* cv) | |
3351 | { | |
3352 | Perl_croak(aTHX_ | |
3353 | "&CORE::%s cannot be called directly", GvNAME(CvGV(cv)) | |
3354 | ); | |
3355 | } | |
3356 | ||
f7461760 | 3357 | /* |
66610fdd RGS |
3358 | * Local variables: |
3359 | * c-indentation-style: bsd | |
3360 | * c-basic-offset: 4 | |
14d04a33 | 3361 | * indent-tabs-mode: nil |
66610fdd RGS |
3362 | * End: |
3363 | * | |
14d04a33 | 3364 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3365 | */ |