Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
1129b882 | 3 | * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
67fbe0e1 | 4 | * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by Larry Wall and others |
79072805 LW |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
a0d0e21e LW |
9 | */ |
10 | ||
11 | /* | |
12 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure | |
4ac71550 | 13 | * of your inquisitiveness, I shall spend all the rest of my days in answering |
a0d0e21e LW |
14 | * you. What more do you want to know?' |
15 | * 'The names of all the stars, and of all living things, and the whole | |
16 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' | |
17 | * laughed Pippin. | |
4ac71550 | 18 | * |
cdad3b53 | 19 | * [p.599 of _The Lord of the Rings_, III/xi: "The PalantÃr"] |
79072805 LW |
20 | */ |
21 | ||
ccfc67b7 JH |
22 | /* |
23 | =head1 GV Functions | |
166f8a29 DM |
24 | A GV is a structure which corresponds to to a Perl typeglob, ie *foo. |
25 | It is a structure that holds a pointer to a scalar, an array, a hash etc, | |
26 | corresponding to $foo, @foo, %foo. | |
27 | ||
28 | GVs are usually found as values in stashes (symbol table hashes) where | |
29 | Perl stores its global variables. | |
30 | ||
31 | =cut | |
ccfc67b7 JH |
32 | */ |
33 | ||
79072805 | 34 | #include "EXTERN.h" |
864dbfa3 | 35 | #define PERL_IN_GV_C |
79072805 | 36 | #include "perl.h" |
6ffcffbd | 37 | #include "overload.inc" |
4aaa4757 | 38 | #include "keywords.h" |
2846acbf | 39 | #include "feature.h" |
79072805 | 40 | |
f54cb97a | 41 | static const char S_autoload[] = "AUTOLOAD"; |
3c81f0b3 | 42 | #define S_autolen (sizeof("AUTOLOAD")-1) |
5c7983e5 | 43 | |
13c59d41 MH |
44 | GV * |
45 | Perl_gv_add_by_type(pTHX_ GV *gv, svtype type) | |
c69033f2 | 46 | { |
d5713896 | 47 | SV **where; |
7918f24d | 48 | |
13c59d41 MH |
49 | if ( |
50 | !gv | |
51 | || ( | |
52 | SvTYPE((const SV *)gv) != SVt_PVGV | |
13be902c | 53 | && SvTYPE((const SV *)gv) != SVt_PVLV |
13c59d41 | 54 | ) |
13be902c | 55 | ) { |
bb85b28a | 56 | const char *what; |
13c59d41 | 57 | if (type == SVt_PVIO) { |
bb85b28a NC |
58 | /* |
59 | * if it walks like a dirhandle, then let's assume that | |
60 | * this is a dirhandle. | |
61 | */ | |
332c2eac | 62 | what = OP_IS_DIRHOP(PL_op->op_type) ? |
bb85b28a | 63 | "dirhandle" : "filehandle"; |
13c59d41 | 64 | } else if (type == SVt_PVHV) { |
bb85b28a NC |
65 | what = "hash"; |
66 | } else { | |
13c59d41 | 67 | what = type == SVt_PVAV ? "array" : "scalar"; |
bb85b28a | 68 | } |
de6f7947 | 69 | /* diag_listed_as: Bad symbol for filehandle */ |
bb85b28a NC |
70 | Perl_croak(aTHX_ "Bad symbol for %s", what); |
71 | } | |
d5713896 | 72 | |
13c59d41 MH |
73 | if (type == SVt_PVHV) { |
74 | where = (SV **)&GvHV(gv); | |
75 | } else if (type == SVt_PVAV) { | |
76 | where = (SV **)&GvAV(gv); | |
77 | } else if (type == SVt_PVIO) { | |
78 | where = (SV **)&GvIOp(gv); | |
79 | } else { | |
80 | where = &GvSV(gv); | |
81 | } | |
7918f24d | 82 | |
13c59d41 MH |
83 | if (!*where) |
84 | { | |
85 | *where = newSV_type(type); | |
86 | if (type == SVt_PVAV && GvNAMELEN(gv) == 3 | |
4c4f3c46 | 87 | && strEQs(GvNAME(gv), "ISA")) |
13c59d41 | 88 | sv_magic(*where, (SV *)gv, PERL_MAGIC_isa, NULL, 0); |
e17aed30 | 89 | } |
13c59d41 | 90 | return gv; |
79072805 LW |
91 | } |
92 | ||
93 | GV * | |
864dbfa3 | 94 | Perl_gv_fetchfile(pTHX_ const char *name) |
79072805 | 95 | { |
7918f24d | 96 | PERL_ARGS_ASSERT_GV_FETCHFILE; |
d9095cec NC |
97 | return gv_fetchfile_flags(name, strlen(name), 0); |
98 | } | |
99 | ||
100 | GV * | |
101 | Perl_gv_fetchfile_flags(pTHX_ const char *const name, const STRLEN namelen, | |
102 | const U32 flags) | |
103 | { | |
4116122e | 104 | char smallbuf[128]; |
53d95988 | 105 | char *tmpbuf; |
d9095cec | 106 | const STRLEN tmplen = namelen + 2; |
79072805 LW |
107 | GV *gv; |
108 | ||
7918f24d | 109 | PERL_ARGS_ASSERT_GV_FETCHFILE_FLAGS; |
d9095cec NC |
110 | PERL_UNUSED_ARG(flags); |
111 | ||
1d7c1841 | 112 | if (!PL_defstash) |
a0714e2c | 113 | return NULL; |
1d7c1841 | 114 | |
d9095cec | 115 | if (tmplen <= sizeof smallbuf) |
53d95988 CS |
116 | tmpbuf = smallbuf; |
117 | else | |
798b63bc | 118 | Newx(tmpbuf, tmplen, char); |
0ac0412a | 119 | /* This is where the debugger's %{"::_<$filename"} hash is created */ |
53d95988 CS |
120 | tmpbuf[0] = '_'; |
121 | tmpbuf[1] = '<'; | |
d9095cec NC |
122 | memcpy(tmpbuf + 2, name, namelen); |
123 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); | |
1d7c1841 | 124 | if (!isGV(gv)) { |
d9095cec | 125 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
c69033f2 | 126 | #ifdef PERL_DONT_CREATE_GVSV |
d9095cec | 127 | GvSV(gv) = newSVpvn(name, namelen); |
c69033f2 | 128 | #else |
d9095cec | 129 | sv_setpvn(GvSV(gv), name, namelen); |
c69033f2 | 130 | #endif |
1d7c1841 | 131 | } |
c7a622b3 | 132 | if (PERLDB_LINE_OR_SAVESRC && !GvAV(gv)) |
43e4250a | 133 | hv_magic(GvHVn(gv), GvAVn(gv), PERL_MAGIC_dbfile); |
53d95988 CS |
134 | if (tmpbuf != smallbuf) |
135 | Safefree(tmpbuf); | |
79072805 LW |
136 | return gv; |
137 | } | |
138 | ||
62d55b22 NC |
139 | /* |
140 | =for apidoc gv_const_sv | |
141 | ||
142 | If C<gv> is a typeglob whose subroutine entry is a constant sub eligible for | |
143 | inlining, or C<gv> is a placeholder reference that would be promoted to such | |
144 | a typeglob, then returns the value returned by the sub. Otherwise, returns | |
796b6530 | 145 | C<NULL>. |
62d55b22 NC |
146 | |
147 | =cut | |
148 | */ | |
149 | ||
150 | SV * | |
151 | Perl_gv_const_sv(pTHX_ GV *gv) | |
152 | { | |
7918f24d | 153 | PERL_ARGS_ASSERT_GV_CONST_SV; |
23491f1d | 154 | PERL_UNUSED_CONTEXT; |
7918f24d | 155 | |
62d55b22 NC |
156 | if (SvTYPE(gv) == SVt_PVGV) |
157 | return cv_const_sv(GvCVu(gv)); | |
16a6e5a4 | 158 | return SvROK(gv) && SvTYPE(SvRV(gv)) != SVt_PVAV && SvTYPE(SvRV(gv)) != SVt_PVCV ? SvRV(gv) : NULL; |
62d55b22 NC |
159 | } |
160 | ||
12816592 NC |
161 | GP * |
162 | Perl_newGP(pTHX_ GV *const gv) | |
163 | { | |
164 | GP *gp; | |
19bad673 | 165 | U32 hash; |
19bad673 NC |
166 | const char *file; |
167 | STRLEN len; | |
2639089b | 168 | #ifndef USE_ITHREADS |
6b352265 | 169 | GV *filegv; |
2639089b | 170 | #endif |
c2587955 | 171 | dVAR; |
19bad673 | 172 | |
7918f24d | 173 | PERL_ARGS_ASSERT_NEWGP; |
2639089b DD |
174 | Newxz(gp, 1, GP); |
175 | gp->gp_egv = gv; /* allow compiler to reuse gv after this */ | |
176 | #ifndef PERL_DONT_CREATE_GVSV | |
177 | gp->gp_sv = newSV(0); | |
178 | #endif | |
7918f24d | 179 | |
c947bc1d FC |
180 | /* PL_curcop may be null here. E.g., |
181 | INIT { bless {} and exit } | |
182 | frees INIT before looking up DESTROY (and creating *DESTROY) | |
183 | */ | |
2639089b DD |
184 | if (PL_curcop) { |
185 | gp->gp_line = CopLINE(PL_curcop); /* 0 otherwise Newxz */ | |
6e314d4f | 186 | #ifdef USE_ITHREADS |
2639089b DD |
187 | if (CopFILE(PL_curcop)) { |
188 | file = CopFILE(PL_curcop); | |
189 | len = strlen(file); | |
190 | } | |
2639089b | 191 | #else |
cb0d3385 FC |
192 | filegv = CopFILEGV(PL_curcop); |
193 | if (filegv) { | |
194 | file = GvNAME(filegv)+2; | |
195 | len = GvNAMELEN(filegv)-2; | |
196 | } | |
6e314d4f | 197 | #endif |
cb0d3385 FC |
198 | else goto no_file; |
199 | } | |
200 | else { | |
201 | no_file: | |
19bad673 NC |
202 | file = ""; |
203 | len = 0; | |
204 | } | |
f4890806 NC |
205 | |
206 | PERL_HASH(hash, file, len); | |
f4890806 | 207 | gp->gp_file_hek = share_hek(file, len, hash); |
12816592 NC |
208 | gp->gp_refcnt = 1; |
209 | ||
210 | return gp; | |
211 | } | |
212 | ||
803f2748 DM |
213 | /* Assign CvGV(cv) = gv, handling weak references. |
214 | * See also S_anonymise_cv_maybe */ | |
215 | ||
216 | void | |
217 | Perl_cvgv_set(pTHX_ CV* cv, GV* gv) | |
218 | { | |
ae77754a | 219 | GV * const oldgv = CvNAMED(cv) ? NULL : SvANY(cv)->xcv_gv_u.xcv_gv; |
b290562e | 220 | HEK *hek; |
803f2748 DM |
221 | PERL_ARGS_ASSERT_CVGV_SET; |
222 | ||
223 | if (oldgv == gv) | |
224 | return; | |
225 | ||
226 | if (oldgv) { | |
cfc1e951 | 227 | if (CvCVGV_RC(cv)) { |
e7881358 | 228 | SvREFCNT_dec_NN(oldgv); |
cfc1e951 DM |
229 | CvCVGV_RC_off(cv); |
230 | } | |
803f2748 | 231 | else { |
803f2748 DM |
232 | sv_del_backref(MUTABLE_SV(oldgv), MUTABLE_SV(cv)); |
233 | } | |
234 | } | |
db5cc3ee FC |
235 | else if ((hek = CvNAME_HEK(cv))) { |
236 | unshare_hek(hek); | |
f3feca7a | 237 | CvLEXICAL_off(cv); |
db5cc3ee | 238 | } |
803f2748 | 239 | |
5988f306 | 240 | CvNAMED_off(cv); |
b290562e | 241 | SvANY(cv)->xcv_gv_u.xcv_gv = gv; |
c794ca97 | 242 | assert(!CvCVGV_RC(cv)); |
803f2748 DM |
243 | |
244 | if (!gv) | |
245 | return; | |
246 | ||
c794ca97 DM |
247 | if (isGV_with_GP(gv) && GvGP(gv) && (GvCV(gv) == cv || GvFORM(gv) == cv)) |
248 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(gv), MUTABLE_SV(cv)); | |
249 | else { | |
cfc1e951 | 250 | CvCVGV_RC_on(cv); |
803f2748 DM |
251 | SvREFCNT_inc_simple_void_NN(gv); |
252 | } | |
803f2748 DM |
253 | } |
254 | ||
ae77754a FC |
255 | /* Convert CvSTASH + CvNAME_HEK into a GV. Conceptually, all subs have a |
256 | GV, but for efficiency that GV may not in fact exist. This function, | |
257 | called by CvGV, reifies it. */ | |
258 | ||
259 | GV * | |
260 | Perl_cvgv_from_hek(pTHX_ CV *cv) | |
261 | { | |
262 | GV *gv; | |
2eaf799e | 263 | SV **svp; |
ae77754a FC |
264 | PERL_ARGS_ASSERT_CVGV_FROM_HEK; |
265 | assert(SvTYPE(cv) == SVt_PVCV); | |
266 | if (!CvSTASH(cv)) return NULL; | |
267 | ASSUME(CvNAME_HEK(cv)); | |
2eaf799e FC |
268 | svp = hv_fetchhek(CvSTASH(cv), CvNAME_HEK(cv), 0); |
269 | gv = MUTABLE_GV(svp && *svp ? *svp : newSV(0)); | |
270 | if (!isGV(gv)) | |
271 | gv_init_pvn(gv, CvSTASH(cv), HEK_KEY(CvNAME_HEK(cv)), | |
ae77754a FC |
272 | HEK_LEN(CvNAME_HEK(cv)), |
273 | SVf_UTF8 * !!HEK_UTF8(CvNAME_HEK(cv))); | |
2eaf799e FC |
274 | if (!CvNAMED(cv)) { /* gv_init took care of it */ |
275 | assert (SvANY(cv)->xcv_gv_u.xcv_gv == gv); | |
276 | return gv; | |
277 | } | |
ae77754a FC |
278 | unshare_hek(CvNAME_HEK(cv)); |
279 | CvNAMED_off(cv); | |
280 | SvANY(cv)->xcv_gv_u.xcv_gv = gv; | |
2eaf799e | 281 | if (svp && *svp) SvREFCNT_inc_simple_void_NN(gv); |
ae77754a FC |
282 | CvCVGV_RC_on(cv); |
283 | return gv; | |
284 | } | |
285 | ||
c68d9564 Z |
286 | /* Assign CvSTASH(cv) = st, handling weak references. */ |
287 | ||
288 | void | |
289 | Perl_cvstash_set(pTHX_ CV *cv, HV *st) | |
290 | { | |
291 | HV *oldst = CvSTASH(cv); | |
292 | PERL_ARGS_ASSERT_CVSTASH_SET; | |
293 | if (oldst == st) | |
294 | return; | |
295 | if (oldst) | |
296 | sv_del_backref(MUTABLE_SV(oldst), MUTABLE_SV(cv)); | |
297 | SvANY(cv)->xcv_stash = st; | |
298 | if (st) | |
299 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(st), MUTABLE_SV(cv)); | |
300 | } | |
803f2748 | 301 | |
e1104062 FC |
302 | /* |
303 | =for apidoc gv_init_pvn | |
304 | ||
305 | Converts a scalar into a typeglob. This is an incoercible typeglob; | |
306 | assigning a reference to it will assign to one of its slots, instead of | |
796b6530 KW |
307 | overwriting it as happens with typeglobs created by C<SvSetSV>. Converting |
308 | any scalar that is C<SvOK()> may produce unpredictable results and is reserved | |
e1104062 FC |
309 | for perl's internal use. |
310 | ||
311 | C<gv> is the scalar to be converted. | |
312 | ||
313 | C<stash> is the parent stash/package, if any. | |
314 | ||
04ec7e59 FC |
315 | C<name> and C<len> give the name. The name must be unqualified; |
316 | that is, it must not include the package name. If C<gv> is a | |
e1104062 FC |
317 | stash element, it is the caller's responsibility to ensure that the name |
318 | passed to this function matches the name of the element. If it does not | |
319 | match, perl's internal bookkeeping will get out of sync. | |
320 | ||
4a4088c4 | 321 | C<flags> can be set to C<SVf_UTF8> if C<name> is a UTF-8 string, or |
04ec7e59 | 322 | the return value of SvUTF8(sv). It can also take the |
796b6530 | 323 | C<GV_ADDMULTI> flag, which means to pretend that the GV has been |
e1104062 FC |
324 | seen before (i.e., suppress "Used once" warnings). |
325 | ||
326 | =for apidoc gv_init | |
327 | ||
4a4088c4 | 328 | The old form of C<gv_init_pvn()>. It does not work with UTF-8 strings, as it |
04ec7e59 | 329 | has no flags parameter. If the C<multi> parameter is set, the |
796b6530 | 330 | C<GV_ADDMULTI> flag will be passed to C<gv_init_pvn()>. |
e1104062 FC |
331 | |
332 | =for apidoc gv_init_pv | |
333 | ||
796b6530 | 334 | Same as C<gv_init_pvn()>, but takes a nul-terminated string for the name |
e1104062 FC |
335 | instead of separate char * and length parameters. |
336 | ||
337 | =for apidoc gv_init_sv | |
338 | ||
796b6530 | 339 | Same as C<gv_init_pvn()>, but takes an SV * for the name instead of separate |
e1104062 FC |
340 | char * and length parameters. C<flags> is currently unused. |
341 | ||
342 | =cut | |
343 | */ | |
344 | ||
463ee0b2 | 345 | void |
04ec7e59 | 346 | Perl_gv_init_sv(pTHX_ GV *gv, HV *stash, SV* namesv, U32 flags) |
e6066781 BF |
347 | { |
348 | char *namepv; | |
349 | STRLEN namelen; | |
350 | PERL_ARGS_ASSERT_GV_INIT_SV; | |
351 | namepv = SvPV(namesv, namelen); | |
352 | if (SvUTF8(namesv)) | |
353 | flags |= SVf_UTF8; | |
04ec7e59 | 354 | gv_init_pvn(gv, stash, namepv, namelen, flags); |
e6066781 BF |
355 | } |
356 | ||
357 | void | |
04ec7e59 | 358 | Perl_gv_init_pv(pTHX_ GV *gv, HV *stash, const char *name, U32 flags) |
e6066781 BF |
359 | { |
360 | PERL_ARGS_ASSERT_GV_INIT_PV; | |
04ec7e59 | 361 | gv_init_pvn(gv, stash, name, strlen(name), flags); |
e6066781 BF |
362 | } |
363 | ||
364 | void | |
04ec7e59 | 365 | Perl_gv_init_pvn(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, U32 flags) |
463ee0b2 | 366 | { |
3b6733bf NC |
367 | const U32 old_type = SvTYPE(gv); |
368 | const bool doproto = old_type > SVt_NULL; | |
f9509170 | 369 | char * const proto = (doproto && SvPOK(gv)) |
dad95a0a | 370 | ? ((void)(SvIsCOW(gv) && (sv_force_normal((SV *)gv), 0)), SvPVX(gv)) |
f9509170 | 371 | : NULL; |
49a54bbe | 372 | const STRLEN protolen = proto ? SvCUR(gv) : 0; |
e0260a5b | 373 | const U32 proto_utf8 = proto ? SvUTF8(gv) : 0; |
756cb477 | 374 | SV *const has_constant = doproto && SvROK(gv) ? SvRV(gv) : NULL; |
1ccdb730 | 375 | const U32 exported_constant = has_constant ? SvPCS_IMPORTED(gv) : 0; |
756cb477 | 376 | |
e6066781 | 377 | PERL_ARGS_ASSERT_GV_INIT_PVN; |
756cb477 NC |
378 | assert (!(proto && has_constant)); |
379 | ||
380 | if (has_constant) { | |
2eaf799e | 381 | /* The constant has to be a scalar, array or subroutine. */ |
5c1f4d79 | 382 | switch (SvTYPE(has_constant)) { |
5c1f4d79 | 383 | case SVt_PVHV: |
5c1f4d79 NC |
384 | case SVt_PVFM: |
385 | case SVt_PVIO: | |
386 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
387 | sv_reftype(has_constant, 0)); | |
4bbde2f7 | 388 | break; |
81d52ecd | 389 | |
42d0e0b7 | 390 | default: NOOP; |
5c1f4d79 | 391 | } |
756cb477 NC |
392 | SvRV_set(gv, NULL); |
393 | SvROK_off(gv); | |
394 | } | |
463ee0b2 | 395 | |
3b6733bf NC |
396 | |
397 | if (old_type < SVt_PVGV) { | |
398 | if (old_type >= SVt_PV) | |
399 | SvCUR_set(gv, 0); | |
ad64d0ec | 400 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); |
3b6733bf | 401 | } |
55d729e4 GS |
402 | if (SvLEN(gv)) { |
403 | if (proto) { | |
f880fe2f | 404 | SvPV_set(gv, NULL); |
b162af07 | 405 | SvLEN_set(gv, 0); |
55d729e4 GS |
406 | SvPOK_off(gv); |
407 | } else | |
94010e71 | 408 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 409 | } |
2e5b91de NC |
410 | SvIOK_off(gv); |
411 | isGV_with_GP_on(gv); | |
12816592 | 412 | |
c43ae56f | 413 | GvGP_set(gv, Perl_newGP(aTHX_ gv)); |
e15faf7d NC |
414 | GvSTASH(gv) = stash; |
415 | if (stash) | |
ad64d0ec | 416 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
04f3bf56 | 417 | gv_name_set(gv, name, len, GV_ADD | ( flags & SVf_UTF8 ? SVf_UTF8 : 0 )); |
04ec7e59 FC |
418 | if (flags & GV_ADDMULTI || doproto) /* doproto means it */ |
419 | GvMULTI_on(gv); /* _was_ mentioned */ | |
2eaf799e FC |
420 | if (has_constant && SvTYPE(has_constant) == SVt_PVCV) { |
421 | /* Not actually a constant. Just a regular sub. */ | |
422 | CV * const cv = (CV *)has_constant; | |
423 | GvCV_set(gv,cv); | |
424 | if (CvSTASH(cv) == stash && ( | |
425 | CvNAME_HEK(cv) == GvNAME_HEK(gv) | |
426 | || ( HEK_LEN(CvNAME_HEK(cv)) == HEK_LEN(GvNAME_HEK(gv)) | |
427 | && HEK_FLAGS(CvNAME_HEK(cv)) != HEK_FLAGS(GvNAME_HEK(gv)) | |
428 | && HEK_UTF8(CvNAME_HEK(cv)) == HEK_UTF8(GvNAME_HEK(gv)) | |
429 | && memEQ(HEK_KEY(CvNAME_HEK(cv)), GvNAME(gv), GvNAMELEN(gv)) | |
430 | ) | |
431 | )) | |
432 | CvGV_set(cv,gv); | |
433 | } | |
434 | else if (doproto) { | |
e3d2b9e7 | 435 | CV *cv; |
756cb477 NC |
436 | if (has_constant) { |
437 | /* newCONSTSUB takes ownership of the reference from us. */ | |
e38acfd7 | 438 | cv = newCONSTSUB_flags(stash, name, len, flags, has_constant); |
75bd28cf FC |
439 | /* In case op.c:S_process_special_blocks stole it: */ |
440 | if (!GvCV(gv)) | |
c43ae56f | 441 | GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv)); |
439cdf38 | 442 | assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */ |
1ccdb730 NC |
443 | /* If this reference was a copy of another, then the subroutine |
444 | must have been "imported", by a Perl space assignment to a GV | |
445 | from a reference to CV. */ | |
446 | if (exported_constant) | |
447 | GvIMPORTED_CV_on(gv); | |
186a5ba8 | 448 | CvSTASH_set(cv, PL_curstash); /* XXX Why is this needed? */ |
756cb477 | 449 | } else { |
186a5ba8 | 450 | cv = newSTUB(gv,1); |
756cb477 | 451 | } |
55d729e4 | 452 | if (proto) { |
e3d2b9e7 | 453 | sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen, |
49a54bbe | 454 | SV_HAS_TRAILING_NUL); |
e0260a5b | 455 | if ( proto_utf8 ) SvUTF8_on(MUTABLE_SV(cv)); |
55d729e4 GS |
456 | } |
457 | } | |
463ee0b2 LW |
458 | } |
459 | ||
76e3520e | 460 | STATIC void |
e6066781 | 461 | S_gv_init_svtype(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 462 | { |
13c59d41 MH |
463 | PERL_ARGS_ASSERT_GV_INIT_SVTYPE; |
464 | ||
465 | switch (sv_type) { | |
466 | case SVt_PVIO: | |
467 | (void)GvIOn(gv); | |
468 | break; | |
469 | case SVt_PVAV: | |
470 | (void)GvAVn(gv); | |
471 | break; | |
472 | case SVt_PVHV: | |
473 | (void)GvHVn(gv); | |
474 | break; | |
c69033f2 | 475 | #ifdef PERL_DONT_CREATE_GVSV |
13c59d41 MH |
476 | case SVt_NULL: |
477 | case SVt_PVCV: | |
478 | case SVt_PVFM: | |
479 | case SVt_PVGV: | |
480 | break; | |
481 | default: | |
482 | if(GvSVn(gv)) { | |
483 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
484 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
485 | its side effect */ | |
486 | } | |
c69033f2 | 487 | #endif |
a0d0e21e LW |
488 | } |
489 | } | |
490 | ||
0f8d4b5e FC |
491 | static void core_xsub(pTHX_ CV* cv); |
492 | ||
493 | static GV * | |
494 | S_maybe_add_coresub(pTHX_ HV * const stash, GV *gv, | |
87566176 | 495 | const char * const name, const STRLEN len) |
0f8d4b5e FC |
496 | { |
497 | const int code = keyword(name, len, 1); | |
498 | static const char file[] = __FILE__; | |
97021f77 | 499 | CV *cv, *oldcompcv = NULL; |
0f8d4b5e | 500 | int opnum = 0; |
0f8d4b5e | 501 | bool ampable = TRUE; /* &{}-able */ |
97021f77 FC |
502 | COP *oldcurcop = NULL; |
503 | yy_parser *oldparser = NULL; | |
504 | I32 oldsavestack_ix = 0; | |
0f8d4b5e FC |
505 | |
506 | assert(gv || stash); | |
507 | assert(name); | |
0f8d4b5e | 508 | |
88b892d8 FC |
509 | if (!code) return NULL; /* Not a keyword */ |
510 | switch (code < 0 ? -code : code) { | |
0f8d4b5e | 511 | /* no support for \&CORE::infix; |
d885f758 | 512 | no support for funcs that do not parse like funcs */ |
88b892d8 | 513 | case KEY___DATA__: case KEY___END__: case KEY_and: case KEY_AUTOLOAD: |
a96df643 | 514 | case KEY_BEGIN : case KEY_CHECK : case KEY_cmp: |
eb31eb35 | 515 | case KEY_default : case KEY_DESTROY: |
88b892d8 | 516 | case KEY_do : case KEY_dump : case KEY_else : case KEY_elsif : |
d51f8b19 | 517 | case KEY_END : case KEY_eq : case KEY_eval : |
88b892d8 | 518 | case KEY_for : case KEY_foreach: case KEY_format: case KEY_ge : |
498a02d8 | 519 | case KEY_given : case KEY_goto : case KEY_grep : |
88b892d8 FC |
520 | case KEY_gt : case KEY_if: case KEY_INIT: case KEY_last: case KEY_le: |
521 | case KEY_local: case KEY_lt: case KEY_m : case KEY_map : case KEY_my: | |
522 | case KEY_ne : case KEY_next : case KEY_no: case KEY_or: case KEY_our: | |
1efec5ed | 523 | case KEY_package: case KEY_print: case KEY_printf: |
919ad5f7 | 524 | case KEY_q : case KEY_qq : case KEY_qr : case KEY_qw : |
88b892d8 | 525 | case KEY_qx : case KEY_redo : case KEY_require: case KEY_return: |
d33bb3da | 526 | case KEY_s : case KEY_say : case KEY_sort : |
d80ed303 | 527 | case KEY_state: case KEY_sub : |
46bef06f | 528 | case KEY_tr : case KEY_UNITCHECK: case KEY_unless: |
88b892d8 FC |
529 | case KEY_until: case KEY_use : case KEY_when : case KEY_while : |
530 | case KEY_x : case KEY_xor : case KEY_y : | |
0f8d4b5e FC |
531 | return NULL; |
532 | case KEY_chdir: | |
eb31eb35 | 533 | case KEY_chomp: case KEY_chop: case KEY_defined: case KEY_delete: |
73665bc4 | 534 | case KEY_eof : case KEY_exec: case KEY_exists : |
0f8d4b5e | 535 | case KEY_lstat: |
bea284c8 | 536 | case KEY_split: |
0f8d4b5e FC |
537 | case KEY_stat: |
538 | case KEY_system: | |
539 | case KEY_truncate: case KEY_unlink: | |
0f8d4b5e FC |
540 | ampable = FALSE; |
541 | } | |
542 | if (!gv) { | |
543 | gv = (GV *)newSV(0); | |
544 | gv_init(gv, stash, name, len, TRUE); | |
545 | } | |
7e68c38b | 546 | GvMULTI_on(gv); |
0f8d4b5e FC |
547 | if (ampable) { |
548 | ENTER; | |
549 | oldcurcop = PL_curcop; | |
550 | oldparser = PL_parser; | |
551 | lex_start(NULL, NULL, 0); | |
552 | oldcompcv = PL_compcv; | |
553 | PL_compcv = NULL; /* Prevent start_subparse from setting | |
554 | CvOUTSIDE. */ | |
555 | oldsavestack_ix = start_subparse(FALSE,0); | |
556 | cv = PL_compcv; | |
557 | } | |
558 | else { | |
559 | /* Avoid calling newXS, as it calls us, and things start to | |
560 | get hairy. */ | |
561 | cv = MUTABLE_CV(newSV_type(SVt_PVCV)); | |
562 | GvCV_set(gv,cv); | |
563 | GvCVGEN(gv) = 0; | |
0f8d4b5e FC |
564 | CvISXSUB_on(cv); |
565 | CvXSUB(cv) = core_xsub; | |
eacbb379 | 566 | PoisonPADLIST(cv); |
0f8d4b5e FC |
567 | } |
568 | CvGV_set(cv, gv); /* This stops new ATTRSUB from setting CvFILE | |
569 | from PL_curcop. */ | |
9b669ea1 DD |
570 | /* XSUBs can't be perl lang/perl5db.pl debugged |
571 | if (PERLDB_LINE_OR_SAVESRC) | |
572 | (void)gv_fetchfile(file); */ | |
0f8d4b5e FC |
573 | CvFILE(cv) = (char *)file; |
574 | /* XXX This is inefficient, as doing things this order causes | |
575 | a prototype check in newATTRSUB. But we have to do | |
576 | it this order as we need an op number before calling | |
577 | new ATTRSUB. */ | |
578 | (void)core_prototype((SV *)cv, name, code, &opnum); | |
87566176 | 579 | if (stash) |
73c02f15 | 580 | (void)hv_store(stash,name,len,(SV *)gv,0); |
0f8d4b5e | 581 | if (ampable) { |
4428fb0e TC |
582 | #ifdef DEBUGGING |
583 | CV *orig_cv = cv; | |
584 | #endif | |
0f8d4b5e | 585 | CvLVALUE_on(cv); |
4428fb0e TC |
586 | /* newATTRSUB will free the CV and return NULL if we're still |
587 | compiling after a syntax error */ | |
e8f91c91 | 588 | if ((cv = newATTRSUB_x( |
7e68c38b | 589 | oldsavestack_ix, (OP *)gv, |
0f8d4b5e FC |
590 | NULL,NULL, |
591 | coresub_op( | |
592 | opnum | |
593 | ? newSVuv((UV)opnum) | |
594 | : newSVpvn(name,len), | |
595 | code, opnum | |
7e68c38b | 596 | ), |
e8f91c91 | 597 | TRUE |
4428fb0e TC |
598 | )) != NULL) { |
599 | assert(GvCV(gv) == orig_cv); | |
600 | if (opnum != OP_VEC && opnum != OP_SUBSTR && opnum != OP_POS | |
cd642408 | 601 | && opnum != OP_UNDEF && opnum != OP_KEYS) |
4428fb0e TC |
602 | CvLVALUE_off(cv); /* Now *that* was a neat trick. */ |
603 | } | |
0f8d4b5e FC |
604 | LEAVE; |
605 | PL_parser = oldparser; | |
606 | PL_curcop = oldcurcop; | |
607 | PL_compcv = oldcompcv; | |
608 | } | |
4428fb0e TC |
609 | if (cv) { |
610 | SV *opnumsv = opnum ? newSVuv((UV)opnum) : (SV *)NULL; | |
611 | cv_set_call_checker( | |
612 | cv, Perl_ck_entersub_args_core, opnumsv ? opnumsv : (SV *)cv | |
613 | ); | |
614 | SvREFCNT_dec(opnumsv); | |
615 | } | |
616 | ||
0f8d4b5e FC |
617 | return gv; |
618 | } | |
619 | ||
954c1994 | 620 | /* |
6c53d59b FC |
621 | =for apidoc gv_fetchmeth |
622 | ||
623 | Like L</gv_fetchmeth_pvn>, but lacks a flags parameter. | |
624 | ||
e6919483 BF |
625 | =for apidoc gv_fetchmeth_sv |
626 | ||
627 | Exactly like L</gv_fetchmeth_pvn>, but takes the name string in the form | |
628 | of an SV instead of a string/length pair. | |
629 | ||
630 | =cut | |
631 | */ | |
632 | ||
633 | GV * | |
634 | Perl_gv_fetchmeth_sv(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
635 | { | |
c290e187 | 636 | char *namepv; |
637 | STRLEN namelen; | |
638 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV; | |
639 | if (LIKELY(SvPOK_nog(namesv))) /* common case */ | |
640 | return gv_fetchmeth_internal(stash, namesv, NULL, 0, level, flags); | |
641 | namepv = SvPV(namesv, namelen); | |
642 | if (SvUTF8(namesv)) flags |= SVf_UTF8; | |
643 | return gv_fetchmeth_pvn(stash, namepv, namelen, level, flags); | |
e6919483 BF |
644 | } |
645 | ||
646 | /* | |
647 | =for apidoc gv_fetchmeth_pv | |
648 | ||
649 | Exactly like L</gv_fetchmeth_pvn>, but takes a nul-terminated string | |
650 | instead of a string/length pair. | |
651 | ||
652 | =cut | |
653 | */ | |
654 | ||
655 | GV * | |
656 | Perl_gv_fetchmeth_pv(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
657 | { | |
658 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV; | |
c6afe666 | 659 | return gv_fetchmeth_internal(stash, NULL, name, strlen(name), level, flags); |
e6919483 BF |
660 | } |
661 | ||
662 | /* | |
663 | =for apidoc gv_fetchmeth_pvn | |
954c1994 GS |
664 | |
665 | Returns the glob with the given C<name> and a defined subroutine or | |
666 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
796b6530 | 667 | accessible via C<@ISA> and C<UNIVERSAL::>. |
954c1994 GS |
668 | |
669 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
670 | side-effect creates a glob with the given C<name> in the given C<stash> | |
671 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 672 | up caching info for this glob. |
954c1994 | 673 | |
796b6530 | 674 | The only significant values for C<flags> are C<GV_SUPER> and C<SVf_UTF8>. |
aae43805 | 675 | |
796b6530 | 676 | C<GV_SUPER> indicates that we want to look up the method in the superclasses |
aae43805 | 677 | of the C<stash>. |
e6919483 | 678 | |
aae43805 | 679 | The |
954c1994 | 680 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b | 681 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 682 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 683 | obtained from the GV with the C<GvCV> macro. |
954c1994 GS |
684 | |
685 | =cut | |
686 | */ | |
687 | ||
e1a479c5 BB |
688 | /* NOTE: No support for tied ISA */ |
689 | ||
c6afe666 | 690 | PERL_STATIC_INLINE GV* |
691 | S_gv_fetchmeth_internal(pTHX_ HV* stash, SV* meth, const char* name, STRLEN len, I32 level, U32 flags) | |
79072805 | 692 | { |
463ee0b2 | 693 | GV** gvp; |
c6afe666 | 694 | HE* he; |
e1a479c5 BB |
695 | AV* linear_av; |
696 | SV** linear_svp; | |
697 | SV* linear_sv; | |
aae43805 | 698 | HV* cstash, *cachestash; |
e1a479c5 BB |
699 | GV* candidate = NULL; |
700 | CV* cand_cv = NULL; | |
e1a479c5 | 701 | GV* topgv = NULL; |
bfcb3514 | 702 | const char *hvname; |
c6afe666 | 703 | I32 create = (level >= 0) ? HV_FETCH_LVALUE : 0; |
e1a479c5 | 704 | I32 items; |
e1a479c5 | 705 | U32 topgen_cmp; |
04f3bf56 | 706 | U32 is_utf8 = flags & SVf_UTF8; |
a0d0e21e | 707 | |
af09ea45 IK |
708 | /* UNIVERSAL methods should be callable without a stash */ |
709 | if (!stash) { | |
e1a479c5 | 710 | create = 0; /* probably appropriate */ |
da51bb9b | 711 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
712 | return 0; |
713 | } | |
714 | ||
e1a479c5 BB |
715 | assert(stash); |
716 | ||
bfcb3514 NC |
717 | hvname = HvNAME_get(stash); |
718 | if (!hvname) | |
e1a479c5 | 719 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 720 | |
e1a479c5 | 721 | assert(hvname); |
55df6700 | 722 | assert(name || meth); |
463ee0b2 | 723 | |
aae43805 | 724 | DEBUG_o( Perl_deb(aTHX_ "Looking for %smethod %s in package %s\n", |
55df6700 FC |
725 | flags & GV_SUPER ? "SUPER " : "", |
726 | name ? name : SvPV_nolen(meth), hvname) ); | |
44a8e56a | 727 | |
dd69841b | 728 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 | 729 | |
aae43805 | 730 | if (flags & GV_SUPER) { |
1a33a059 FC |
731 | if (!HvAUX(stash)->xhv_mro_meta->super) |
732 | HvAUX(stash)->xhv_mro_meta->super = newHV(); | |
733 | cachestash = HvAUX(stash)->xhv_mro_meta->super; | |
aae43805 FC |
734 | } |
735 | else cachestash = stash; | |
736 | ||
e1a479c5 | 737 | /* check locally for a real method or a cache entry */ |
c6afe666 | 738 | he = (HE*)hv_common( |
739 | cachestash, meth, name, len, (flags & SVf_UTF8) ? HVhek_UTF8 : 0, create, NULL, 0 | |
740 | ); | |
741 | if (he) gvp = (GV**)&HeVAL(he); | |
742 | else gvp = NULL; | |
743 | ||
e1a479c5 BB |
744 | if(gvp) { |
745 | topgv = *gvp; | |
0f8d4b5e | 746 | have_gv: |
e1a479c5 BB |
747 | assert(topgv); |
748 | if (SvTYPE(topgv) != SVt_PVGV) | |
55df6700 FC |
749 | { |
750 | if (!name) | |
751 | name = SvPV_nomg(meth, len); | |
04ec7e59 | 752 | gv_init_pvn(topgv, stash, name, len, GV_ADDMULTI|is_utf8); |
55df6700 | 753 | } |
e1a479c5 BB |
754 | if ((cand_cv = GvCV(topgv))) { |
755 | /* If genuine method or valid cache entry, use it */ | |
756 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
757 | return topgv; | |
758 | } | |
759 | else { | |
760 | /* stale cache entry, junk it and move on */ | |
e7881358 | 761 | SvREFCNT_dec_NN(cand_cv); |
c43ae56f DM |
762 | GvCV_set(topgv, NULL); |
763 | cand_cv = NULL; | |
e1a479c5 BB |
764 | GvCVGEN(topgv) = 0; |
765 | } | |
766 | } | |
767 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
768 | /* cache indicates no such method definitively */ | |
769 | return 0; | |
770 | } | |
aae43805 FC |
771 | else if (stash == cachestash |
772 | && len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4 | |
4c4f3c46 | 773 | && strEQs(hvname, "CORE") |
87566176 | 774 | && S_maybe_add_coresub(aTHX_ NULL,topgv,name,len)) |
0f8d4b5e | 775 | goto have_gv; |
463ee0b2 | 776 | } |
79072805 | 777 | |
aae43805 | 778 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ |
e1a479c5 BB |
779 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
780 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
781 | while (items--) { | |
782 | linear_sv = *linear_svp++; | |
783 | assert(linear_sv); | |
784 | cstash = gv_stashsv(linear_sv, 0); | |
785 | ||
dd69841b | 786 | if (!cstash) { |
ecad31f0 | 787 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), |
d0c0e7dd | 788 | "Can't locate package %"SVf" for @%"HEKf"::ISA", |
ecad31f0 | 789 | SVfARG(linear_sv), |
d0c0e7dd | 790 | HEKfARG(HvNAME_HEK(stash))); |
e1a479c5 BB |
791 | continue; |
792 | } | |
9607fc9c | 793 | |
e1a479c5 BB |
794 | assert(cstash); |
795 | ||
c60dbbc3 | 796 | gvp = (GV**)hv_fetch(cstash, name, is_utf8 ? -(I32)len : (I32)len, 0); |
0f8d4b5e FC |
797 | if (!gvp) { |
798 | if (len > 1 && HvNAMELEN_get(cstash) == 4) { | |
799 | const char *hvname = HvNAME(cstash); assert(hvname); | |
4c4f3c46 | 800 | if (strEQs(hvname, "CORE") |
0f8d4b5e | 801 | && (candidate = |
87566176 | 802 | S_maybe_add_coresub(aTHX_ cstash,NULL,name,len) |
0f8d4b5e FC |
803 | )) |
804 | goto have_candidate; | |
805 | } | |
806 | continue; | |
807 | } | |
808 | else candidate = *gvp; | |
809 | have_candidate: | |
e1a479c5 | 810 | assert(candidate); |
04f3bf56 | 811 | if (SvTYPE(candidate) != SVt_PVGV) |
04ec7e59 | 812 | gv_init_pvn(candidate, cstash, name, len, GV_ADDMULTI|is_utf8); |
e1a479c5 BB |
813 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { |
814 | /* | |
815 | * Found real method, cache method in topgv if: | |
816 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
817 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
818 | */ | |
819 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
820 | CV *old_cv = GvCV(topgv); |
821 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 822 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 823 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
824 | GvCVGEN(topgv) = topgen_cmp; |
825 | } | |
826 | return candidate; | |
827 | } | |
828 | } | |
9607fc9c | 829 | |
e1a479c5 BB |
830 | /* Check UNIVERSAL without caching */ |
831 | if(level == 0 || level == -1) { | |
55df6700 FC |
832 | candidate = gv_fetchmeth_internal(NULL, meth, name, len, 1, |
833 | flags &~GV_SUPER); | |
e1a479c5 BB |
834 | if(candidate) { |
835 | cand_cv = GvCV(candidate); | |
836 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
837 | CV *old_cv = GvCV(topgv); |
838 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 839 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 840 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
841 | GvCVGEN(topgv) = topgen_cmp; |
842 | } | |
843 | return candidate; | |
844 | } | |
845 | } | |
846 | ||
847 | if (topgv && GvREFCNT(topgv) == 1) { | |
848 | /* cache the fact that the method is not defined */ | |
849 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
850 | } |
851 | ||
79072805 LW |
852 | return 0; |
853 | } | |
854 | ||
c6afe666 | 855 | GV * |
856 | Perl_gv_fetchmeth_pvn(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) | |
857 | { | |
858 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN; | |
859 | return gv_fetchmeth_internal(stash, NULL, name, len, level, flags); | |
860 | } | |
861 | ||
954c1994 | 862 | /* |
460e5730 FC |
863 | =for apidoc gv_fetchmeth_autoload |
864 | ||
865 | This is the old form of L</gv_fetchmeth_pvn_autoload>, which has no flags | |
866 | parameter. | |
867 | ||
d21989ed | 868 | =for apidoc gv_fetchmeth_sv_autoload |
611c1e95 | 869 | |
d21989ed BF |
870 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes the name string in the form |
871 | of an SV instead of a string/length pair. | |
872 | ||
873 | =cut | |
874 | */ | |
875 | ||
876 | GV * | |
877 | Perl_gv_fetchmeth_sv_autoload(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
878 | { | |
879 | char *namepv; | |
880 | STRLEN namelen; | |
881 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV_AUTOLOAD; | |
882 | namepv = SvPV(namesv, namelen); | |
883 | if (SvUTF8(namesv)) | |
884 | flags |= SVf_UTF8; | |
885 | return gv_fetchmeth_pvn_autoload(stash, namepv, namelen, level, flags); | |
886 | } | |
887 | ||
888 | /* | |
889 | =for apidoc gv_fetchmeth_pv_autoload | |
890 | ||
891 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes a nul-terminated string | |
892 | instead of a string/length pair. | |
893 | ||
894 | =cut | |
895 | */ | |
896 | ||
897 | GV * | |
898 | Perl_gv_fetchmeth_pv_autoload(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
899 | { | |
900 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV_AUTOLOAD; | |
901 | return gv_fetchmeth_pvn_autoload(stash, name, strlen(name), level, flags); | |
902 | } | |
903 | ||
904 | /* | |
905 | =for apidoc gv_fetchmeth_pvn_autoload | |
906 | ||
796b6530 | 907 | Same as C<gv_fetchmeth_pvn()>, but looks for autoloaded subroutines too. |
611c1e95 IZ |
908 | Returns a glob for the subroutine. |
909 | ||
910 | For an autoloaded subroutine without a GV, will create a GV even | |
796b6530 | 911 | if C<level < 0>. For an autoloaded subroutine without a stub, C<GvCV()> |
611c1e95 IZ |
912 | of the result may be zero. |
913 | ||
796b6530 | 914 | Currently, the only significant value for C<flags> is C<SVf_UTF8>. |
d21989ed | 915 | |
611c1e95 IZ |
916 | =cut |
917 | */ | |
918 | ||
919 | GV * | |
d21989ed | 920 | Perl_gv_fetchmeth_pvn_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) |
611c1e95 | 921 | { |
499321d3 | 922 | GV *gv = gv_fetchmeth_pvn(stash, name, len, level, flags); |
611c1e95 | 923 | |
d21989ed | 924 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN_AUTOLOAD; |
7918f24d | 925 | |
611c1e95 | 926 | if (!gv) { |
611c1e95 IZ |
927 | CV *cv; |
928 | GV **gvp; | |
929 | ||
930 | if (!stash) | |
6136c704 | 931 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b | 932 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 | 933 | return NULL; |
d21989ed | 934 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, flags))) |
6136c704 | 935 | return NULL; |
611c1e95 IZ |
936 | cv = GvCV(gv); |
937 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 938 | return NULL; |
611c1e95 IZ |
939 | /* Have an autoload */ |
940 | if (level < 0) /* Cannot do without a stub */ | |
d21989ed | 941 | gv_fetchmeth_pvn(stash, name, len, 0, flags); |
c60dbbc3 BF |
942 | gvp = (GV**)hv_fetch(stash, name, |
943 | (flags & SVf_UTF8) ? -(I32)len : (I32)len, (level >= 0)); | |
611c1e95 | 944 | if (!gvp) |
6136c704 | 945 | return NULL; |
611c1e95 IZ |
946 | return *gvp; |
947 | } | |
948 | return gv; | |
949 | } | |
950 | ||
951 | /* | |
954c1994 GS |
952 | =for apidoc gv_fetchmethod_autoload |
953 | ||
954 | Returns the glob which contains the subroutine to call to invoke the method | |
955 | on the C<stash>. In fact in the presence of autoloading this may be the | |
796b6530 | 956 | glob for "AUTOLOAD". In this case the corresponding variable C<$AUTOLOAD> is |
b267980d | 957 | already setup. |
954c1994 GS |
958 | |
959 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
960 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 961 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 962 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 963 | with a non-zero C<autoload> parameter. |
954c1994 | 964 | |
cec2d7b1 FC |
965 | These functions grant C<"SUPER"> token |
966 | as a prefix of the method name. Note | |
954c1994 GS |
967 | that if you want to keep the returned glob for a long time, you need to |
968 | check for it being "AUTOLOAD", since at the later time the call may load a | |
796b6530 | 969 | different subroutine due to C<$AUTOLOAD> changing its value. Use the glob |
cec2d7b1 | 970 | created as a side effect to do this. |
954c1994 | 971 | |
cec2d7b1 FC |
972 | These functions have the same side-effects as C<gv_fetchmeth> with |
973 | C<level==0>. The warning against passing the GV returned by | |
974 | C<gv_fetchmeth> to C<call_sv> applies equally to these functions. | |
954c1994 GS |
975 | |
976 | =cut | |
977 | */ | |
978 | ||
dc848c6f | 979 | GV * |
864dbfa3 | 980 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 981 | { |
547bb267 NC |
982 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
983 | ||
256d1bb2 NC |
984 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
985 | } | |
986 | ||
44130a26 BF |
987 | GV * |
988 | Perl_gv_fetchmethod_sv_flags(pTHX_ HV *stash, SV *namesv, U32 flags) | |
989 | { | |
990 | char *namepv; | |
991 | STRLEN namelen; | |
992 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_SV_FLAGS; | |
993 | namepv = SvPV(namesv, namelen); | |
994 | if (SvUTF8(namesv)) | |
995 | flags |= SVf_UTF8; | |
996 | return gv_fetchmethod_pvn_flags(stash, namepv, namelen, flags); | |
997 | } | |
998 | ||
999 | GV * | |
1000 | Perl_gv_fetchmethod_pv_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
1001 | { | |
1002 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PV_FLAGS; | |
1003 | return gv_fetchmethod_pvn_flags(stash, name, strlen(name), flags); | |
1004 | } | |
1005 | ||
256d1bb2 NC |
1006 | /* Don't merge this yet, as it's likely to get a len parameter, and possibly |
1007 | even a U32 hash */ | |
1008 | GV * | |
44130a26 | 1009 | Perl_gv_fetchmethod_pvn_flags(pTHX_ HV *stash, const char *name, const STRLEN len, U32 flags) |
256d1bb2 | 1010 | { |
65308f87 YO |
1011 | const char * const origname = name; |
1012 | const char * const name_end = name + len; | |
e2cace1e | 1013 | const char *last_separator = NULL; |
a0d0e21e | 1014 | GV* gv; |
0dae17bd | 1015 | HV* ostash = stash; |
ad64d0ec | 1016 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 NC |
1017 | const U32 autoload = flags & GV_AUTOLOAD; |
1018 | const U32 do_croak = flags & GV_CROAK; | |
14d1dfbd | 1019 | const U32 is_utf8 = flags & SVf_UTF8; |
0dae17bd | 1020 | |
44130a26 | 1021 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PVN_FLAGS; |
7918f24d | 1022 | |
eff494dd | 1023 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 | 1024 | stash = NULL; |
c9bf4021 | 1025 | else { |
e2cace1e | 1026 | /* The only way stash can become NULL later on is if last_separator is set, |
c9bf4021 NC |
1027 | which in turn means that there is no need for a SVt_PVHV case |
1028 | the error reporting code. */ | |
1029 | } | |
b267980d | 1030 | |
cfb73676 YO |
1031 | { |
1032 | /* check if the method name is fully qualified or | |
1033 | * not, and separate the package name from the actual | |
1034 | * method name. | |
1035 | * | |
1036 | * leaves last_separator pointing to the beginning of the | |
1037 | * last package separator (either ' or ::) or 0 | |
1038 | * if none was found. | |
1039 | * | |
1040 | * leaves name pointing at the beginning of the | |
1041 | * method name. | |
1042 | */ | |
1043 | const char *name_cursor = name; | |
1044 | const char * const name_em1 = name_end - 1; /* name_end minus 1 */ | |
1045 | for (name_cursor = name; name_cursor < name_end ; name_cursor++) { | |
1046 | if (*name_cursor == '\'') { | |
1047 | last_separator = name_cursor; | |
1048 | name = name_cursor + 1; | |
1049 | } | |
1050 | else if (name_cursor < name_em1 && *name_cursor == ':' && name_cursor[1] == ':') { | |
1051 | last_separator = name_cursor++; | |
1052 | name = name_cursor + 1; | |
1053 | } | |
1054 | } | |
a0d0e21e | 1055 | } |
cfb73676 YO |
1056 | |
1057 | /* did we find a separator? */ | |
e2cace1e | 1058 | if (last_separator) { |
9b7f107c YO |
1059 | STRLEN sep_len= last_separator - origname; |
1060 | if ( memEQs(origname, sep_len, "SUPER")) { | |
9607fc9c | 1061 | /* ->SUPER::method should really be looked up in original stash */ |
aae43805 FC |
1062 | stash = CopSTASH(PL_curcop); |
1063 | flags |= GV_SUPER; | |
cea2e8a9 | 1064 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
0308a534 | 1065 | origname, HvENAME_get(stash), name) ); |
4633a7c4 | 1066 | } |
9b7f107c YO |
1067 | else if ( sep_len >= 7 && |
1068 | strEQs(last_separator - 7, "::SUPER")) { | |
aae43805 | 1069 | /* don't autovifify if ->NoSuchStash::SUPER::method */ |
9b7f107c | 1070 | stash = gv_stashpvn(origname, sep_len - 7, is_utf8); |
aae43805 FC |
1071 | if (stash) flags |= GV_SUPER; |
1072 | } | |
e189a56d | 1073 | else { |
af09ea45 | 1074 | /* don't autovifify if ->NoSuchStash::method */ |
9b7f107c | 1075 | stash = gv_stashpvn(origname, sep_len, is_utf8); |
e189a56d | 1076 | } |
0dae17bd | 1077 | ostash = stash; |
4633a7c4 LW |
1078 | } |
1079 | ||
65308f87 | 1080 | gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags); |
a0d0e21e | 1081 | if (!gv) { |
7da9d78d AB |
1082 | /* This is the special case that exempts Foo->import and |
1083 | Foo->unimport from being an error even if there's no | |
1084 | import/unimport subroutine */ | |
2f6e0fe7 | 1085 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
159b6efe | 1086 | gv = MUTABLE_GV(&PL_sv_yes); |
dc848c6f | 1087 | else if (autoload) |
c8416c26 | 1088 | gv = gv_autoload_pvn( |
65308f87 | 1089 | ostash, name, name_end - name, GV_AUTOLOAD_ISMETHOD|flags |
c8416c26 | 1090 | ); |
256d1bb2 NC |
1091 | if (!gv && do_croak) { |
1092 | /* Right now this is exclusively for the benefit of S_method_common | |
1093 | in pp_hot.c */ | |
1094 | if (stash) { | |
15e6cdd9 DG |
1095 | /* If we can't find an IO::File method, it might be a call on |
1096 | * a filehandle. If IO:File has not been loaded, try to | |
1097 | * require it first instead of croaking */ | |
1098 | const char *stash_name = HvNAME_get(stash); | |
31b05a0f FR |
1099 | if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File") |
1100 | && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL, | |
1101 | STR_WITH_LEN("IO/File.pm"), 0, | |
1102 | HV_FETCH_ISEXISTS, NULL, 0) | |
15e6cdd9 | 1103 | ) { |
31b05a0f | 1104 | require_pv("IO/File.pm"); |
65308f87 | 1105 | gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags); |
15e6cdd9 DG |
1106 | if (gv) |
1107 | return gv; | |
1108 | } | |
256d1bb2 | 1109 | Perl_croak(aTHX_ |
b17a0679 | 1110 | "Can't locate object method \"%"UTF8f |
d0c0e7dd | 1111 | "\" via package \"%"HEKf"\"", |
65308f87 | 1112 | UTF8fARG(is_utf8, name_end - name, name), |
d0c0e7dd | 1113 | HEKfARG(HvNAME_HEK(stash))); |
256d1bb2 NC |
1114 | } |
1115 | else { | |
ecad31f0 | 1116 | SV* packnamesv; |
256d1bb2 | 1117 | |
e2cace1e YO |
1118 | if (last_separator) { |
1119 | packnamesv = newSVpvn_flags(origname, last_separator - origname, | |
ecad31f0 | 1120 | SVs_TEMP | is_utf8); |
256d1bb2 | 1121 | } else { |
017c5e4e | 1122 | packnamesv = error_report; |
256d1bb2 NC |
1123 | } |
1124 | ||
1125 | Perl_croak(aTHX_ | |
b17a0679 FC |
1126 | "Can't locate object method \"%"UTF8f |
1127 | "\" via package \"%"SVf"\"" | |
ecad31f0 | 1128 | " (perhaps you forgot to load \"%"SVf"\"?)", |
65308f87 | 1129 | UTF8fARG(is_utf8, name_end - name, name), |
ecad31f0 | 1130 | SVfARG(packnamesv), SVfARG(packnamesv)); |
256d1bb2 NC |
1131 | } |
1132 | } | |
463ee0b2 | 1133 | } |
dc848c6f | 1134 | else if (autoload) { |
9d4ba2ae | 1135 | CV* const cv = GvCV(gv); |
09280a33 CS |
1136 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
1137 | GV* stubgv; | |
1138 | GV* autogv; | |
1139 | ||
0c028dca | 1140 | if (CvANON(cv) || CvLEXICAL(cv)) |
09280a33 CS |
1141 | stubgv = gv; |
1142 | else { | |
1143 | stubgv = CvGV(cv); | |
1144 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
1145 | stubgv = gv; | |
1146 | } | |
c8416c26 BF |
1147 | autogv = gv_autoload_pvn(GvSTASH(stubgv), |
1148 | GvNAME(stubgv), GvNAMELEN(stubgv), | |
1149 | GV_AUTOLOAD_ISMETHOD | |
1150 | | (GvNAMEUTF8(stubgv) ? SVf_UTF8 : 0)); | |
dc848c6f | 1151 | if (autogv) |
1152 | gv = autogv; | |
1153 | } | |
1154 | } | |
44a8e56a | 1155 | |
1156 | return gv; | |
1157 | } | |
1158 | ||
1159 | GV* | |
0eeb01b9 | 1160 | Perl_gv_autoload_sv(pTHX_ HV *stash, SV* namesv, U32 flags) |
5fba3c91 BF |
1161 | { |
1162 | char *namepv; | |
1163 | STRLEN namelen; | |
0fe84f7c | 1164 | PERL_ARGS_ASSERT_GV_AUTOLOAD_SV; |
5fba3c91 BF |
1165 | namepv = SvPV(namesv, namelen); |
1166 | if (SvUTF8(namesv)) | |
1167 | flags |= SVf_UTF8; | |
0eeb01b9 | 1168 | return gv_autoload_pvn(stash, namepv, namelen, flags); |
5fba3c91 BF |
1169 | } |
1170 | ||
1171 | GV* | |
0eeb01b9 | 1172 | Perl_gv_autoload_pv(pTHX_ HV *stash, const char *namepv, U32 flags) |
5fba3c91 | 1173 | { |
0fe84f7c | 1174 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PV; |
0eeb01b9 | 1175 | return gv_autoload_pvn(stash, namepv, strlen(namepv), flags); |
5fba3c91 BF |
1176 | } |
1177 | ||
1178 | GV* | |
0eeb01b9 | 1179 | Perl_gv_autoload_pvn(pTHX_ HV *stash, const char *name, STRLEN len, U32 flags) |
44a8e56a | 1180 | { |
44a8e56a | 1181 | GV* gv; |
1182 | CV* cv; | |
1183 | HV* varstash; | |
1184 | GV* vargv; | |
1185 | SV* varsv; | |
c8416c26 BF |
1186 | SV *packname = NULL; |
1187 | U32 is_utf8 = flags & SVf_UTF8 ? SVf_UTF8 : 0; | |
44a8e56a | 1188 | |
0fe84f7c | 1189 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PVN; |
7918f24d | 1190 | |
7edbdc6b | 1191 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c | 1192 | return NULL; |
0dae17bd GS |
1193 | if (stash) { |
1194 | if (SvTYPE(stash) < SVt_PVHV) { | |
c8416c26 BF |
1195 | STRLEN packname_len = 0; |
1196 | const char * const packname_ptr = SvPV_const(MUTABLE_SV(stash), packname_len); | |
1197 | packname = newSVpvn_flags(packname_ptr, packname_len, | |
1198 | SVs_TEMP | SvUTF8(stash)); | |
5c284bb0 | 1199 | stash = NULL; |
0dae17bd | 1200 | } |
c8416c26 BF |
1201 | else |
1202 | packname = sv_2mortal(newSVhek(HvNAME_HEK(stash))); | |
aae43805 | 1203 | if (flags & GV_SUPER) sv_catpvs(packname, "::SUPER"); |
0dae17bd | 1204 | } |
257dc59d FC |
1205 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, |
1206 | is_utf8 | (flags & GV_SUPER)))) | |
a0714e2c | 1207 | return NULL; |
dc848c6f | 1208 | cv = GvCV(gv); |
1209 | ||
adb5a9ae | 1210 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 1211 | return NULL; |
ed850460 | 1212 | |
dc848c6f | 1213 | /* |
1214 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
1215 | */ | |
0eeb01b9 FC |
1216 | if ( |
1217 | !(flags & GV_AUTOLOAD_ISMETHOD) | |
1218 | && (GvCVGEN(gv) || GvSTASH(gv) != stash) | |
041457d9 | 1219 | ) |
d1d15184 | 1220 | Perl_ck_warner_d(aTHX_ packWARN(WARN_DEPRECATED), |
b17a0679 FC |
1221 | "Use of inherited AUTOLOAD for non-method %"SVf |
1222 | "::%"UTF8f"() is deprecated", | |
ecad31f0 | 1223 | SVfARG(packname), |
b17a0679 | 1224 | UTF8fARG(is_utf8, len, name)); |
44a8e56a | 1225 | |
aed2304a | 1226 | if (CvISXSUB(cv)) { |
bb619f37 FC |
1227 | /* Instead of forcing the XSUB do another lookup for $AUTOLOAD |
1228 | * and split that value on the last '::', pass along the same data | |
1229 | * via the SvPVX field in the CV, and the stash in CvSTASH. | |
8fa6a409 FC |
1230 | * |
1231 | * Due to an unfortunate accident of history, the SvPVX field | |
e1fa07e3 | 1232 | * serves two purposes. It is also used for the subroutine's pro- |
8fa6a409 FC |
1233 | * type. Since SvPVX has been documented as returning the sub name |
1234 | * for a long time, but not as returning the prototype, we have | |
1235 | * to preserve the SvPVX AUTOLOAD behaviour and put the prototype | |
1236 | * elsewhere. | |
1237 | * | |
1238 | * We put the prototype in the same allocated buffer, but after | |
1239 | * the sub name. The SvPOK flag indicates the presence of a proto- | |
1240 | * type. The CvAUTOLOAD flag indicates the presence of a sub name. | |
1241 | * If both flags are on, then SvLEN is used to indicate the end of | |
1242 | * the prototype (artificially lower than what is actually allo- | |
1243 | * cated), at the risk of having to reallocate a few bytes unneces- | |
1244 | * sarily--but that should happen very rarely, if ever. | |
1245 | * | |
1246 | * We use SvUTF8 for both prototypes and sub names, so if one is | |
1247 | * UTF8, the other must be upgraded. | |
adb5a9ae | 1248 | */ |
c68d9564 | 1249 | CvSTASH_set(cv, stash); |
8fa6a409 | 1250 | if (SvPOK(cv)) { /* Ouch! */ |
e7881358 | 1251 | SV * const tmpsv = newSVpvn_flags(name, len, is_utf8); |
8fa6a409 FC |
1252 | STRLEN ulen; |
1253 | const char *proto = CvPROTO(cv); | |
1254 | assert(proto); | |
1255 | if (SvUTF8(cv)) | |
1256 | sv_utf8_upgrade_flags_grow(tmpsv, 0, CvPROTOLEN(cv) + 2); | |
1257 | ulen = SvCUR(tmpsv); | |
1258 | SvCUR(tmpsv)++; /* include null in string */ | |
1259 | sv_catpvn_flags( | |
1260 | tmpsv, proto, CvPROTOLEN(cv), SV_CATBYTES*!SvUTF8(cv) | |
1261 | ); | |
1262 | SvTEMP_on(tmpsv); /* Allow theft */ | |
1263 | sv_setsv_nomg((SV *)cv, tmpsv); | |
05b525f4 | 1264 | SvTEMP_off(tmpsv); |
e7881358 | 1265 | SvREFCNT_dec_NN(tmpsv); |
8fa6a409 FC |
1266 | SvLEN(cv) = SvCUR(cv) + 1; |
1267 | SvCUR(cv) = ulen; | |
1268 | } | |
1269 | else { | |
1270 | sv_setpvn((SV *)cv, name, len); | |
1271 | SvPOK_off(cv); | |
1272 | if (is_utf8) | |
c8416c26 | 1273 | SvUTF8_on(cv); |
8fa6a409 FC |
1274 | else SvUTF8_off(cv); |
1275 | } | |
1276 | CvAUTOLOAD_on(cv); | |
adb5a9ae | 1277 | } |
adb5a9ae | 1278 | |
44a8e56a | 1279 | /* |
1280 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
1281 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
1282 | * use that, but for lack of anything better we will use the sub's | |
1283 | * original package to look up $AUTOLOAD. | |
1284 | */ | |
18691622 | 1285 | varstash = CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv)); |
5c7983e5 | 1286 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
1287 | ENTER; |
1288 | ||
c69033f2 | 1289 | if (!isGV(vargv)) { |
04ec7e59 | 1290 | gv_init_pvn(vargv, varstash, S_autoload, S_autolen, 0); |
c69033f2 | 1291 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 1292 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
1293 | #endif |
1294 | } | |
3d35f11b | 1295 | LEAVE; |
e203899d | 1296 | varsv = GvSVn(vargv); |
4bac9ae4 CS |
1297 | SvTAINTED_off(varsv); /* previous $AUTOLOAD taint is obsolete */ |
1298 | /* XXX: this process is not careful to avoid extra magic gets and sets; tied $AUTOLOAD will get noise */ | |
c8416c26 | 1299 | sv_setsv(varsv, packname); |
396482e1 | 1300 | sv_catpvs(varsv, "::"); |
d40bf27b NC |
1301 | /* Ensure SvSETMAGIC() is called if necessary. In particular, to clear |
1302 | tainting if $FOO::AUTOLOAD was previously tainted, but is not now. */ | |
61a9130e FC |
1303 | sv_catpvn_flags( |
1304 | varsv, name, len, | |
5bcd1ef4 | 1305 | SV_SMAGIC|(is_utf8 ? SV_CATUTF8 : SV_CATBYTES) |
61a9130e | 1306 | ); |
c8416c26 BF |
1307 | if (is_utf8) |
1308 | SvUTF8_on(varsv); | |
a0d0e21e LW |
1309 | return gv; |
1310 | } | |
1311 | ||
44a2ac75 YO |
1312 | |
1313 | /* require_tie_mod() internal routine for requiring a module | |
486ec47a | 1314 | * that implements the logic of automatic ties like %! and %- |
e94ea821 FC |
1315 | * It loads the module and then calls the _tie_it subroutine |
1316 | * with the passed gv as an argument. | |
44a2ac75 YO |
1317 | * |
1318 | * The "gv" parameter should be the glob. | |
ee33cc1a | 1319 | * "varname" holds the 1-char name of the var, used for error messages. |
45cbc99a | 1320 | * "namesv" holds the module name. Its refcount will be decremented. |
45cbc99a | 1321 | * "flags": if flag & 1 then save the scalar before loading. |
44a2ac75 YO |
1322 | * For the protection of $! to work (it is set by this routine) |
1323 | * the sv slot must already be magicalized. | |
d2c93421 | 1324 | */ |
e94ea821 | 1325 | STATIC void |
ee33cc1a | 1326 | S_require_tie_mod(pTHX_ GV *gv, const char varname, const char * name, |
a1683482 | 1327 | STRLEN len, const U32 flags) |
d2c93421 | 1328 | { |
e94ea821 | 1329 | const SV * const target = varname == '[' ? GvSV(gv) : (SV *)GvHV(gv); |
45cbc99a | 1330 | |
7918f24d NC |
1331 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
1332 | ||
e94ea821 FC |
1333 | /* If it is not tied */ |
1334 | if (!target || !SvRMAGICAL(target) | |
1335 | || !mg_find(target, | |
1336 | varname == '[' ? PERL_MAGIC_tiedscalar : PERL_MAGIC_tied)) | |
1337 | { | |
1338 | HV *stash; | |
1339 | GV **gvp; | |
1340 | dSP; | |
1341 | ||
1342 | ENTER; | |
e94ea821 | 1343 | |
4c4f3c46 | 1344 | #define HV_FETCH_TIE_FUNC (GV **)hv_fetchs(stash, "_tie_it", 0) |
e94ea821 FC |
1345 | |
1346 | /* Load the module if it is not loaded. */ | |
360cebfd | 1347 | if (!(stash = gv_stashpvn(name, len, 0)) |
e94ea821 FC |
1348 | || !(gvp = HV_FETCH_TIE_FUNC) || !*gvp || !GvCV(*gvp)) |
1349 | { | |
360cebfd | 1350 | SV * const module = newSVpvn(name, len); |
b82b06b8 | 1351 | const char type = varname == '[' ? '$' : '%'; |
44a2ac75 | 1352 | if ( flags & 1 ) |
45cbc99a | 1353 | save_scalar(gv); |
5b2ef88e | 1354 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
61bac25c | 1355 | assert(sp == PL_stack_sp); |
360cebfd | 1356 | stash = gv_stashpvn(name, len, 0); |
44a2ac75 | 1357 | if (!stash) |
360cebfd FC |
1358 | Perl_croak(aTHX_ "panic: Can't use %c%c because %s is not available", |
1359 | type, varname, name); | |
e94ea821 | 1360 | else if (!(gvp = HV_FETCH_TIE_FUNC) || !*gvp || !GvCV(*gvp)) |
360cebfd FC |
1361 | Perl_croak(aTHX_ "panic: Can't use %c%c because %s does not define _tie_it", |
1362 | type, varname, name); | |
e94ea821 FC |
1363 | } |
1364 | /* Now call the tie function. It should be in *gvp. */ | |
1365 | assert(gvp); assert(*gvp); assert(GvCV(*gvp)); | |
1366 | PUSHMARK(SP); | |
1367 | XPUSHs((SV *)gv); | |
1368 | PUTBACK; | |
1369 | call_sv((SV *)*gvp, G_VOID|G_DISCARD); | |
1370 | LEAVE; | |
d2c93421 RH |
1371 | } |
1372 | } | |
1373 | ||
7c719134 YO |
1374 | /* add a require_tie_mod_s - the _s suffix is similar to pvs type suffixes, |
1375 | * IOW it means we do STR_WITH_LEN() ourselves and the user should pass in | |
1376 | * a true string WITHOUT a len. | |
1377 | */ | |
1378 | #define require_tie_mod_s(gv, varname, name, flags) \ | |
1379 | S_require_tie_mod(aTHX_ gv, varname, STR_WITH_LEN(name), flags) | |
1380 | ||
954c1994 GS |
1381 | /* |
1382 | =for apidoc gv_stashpv | |
1383 | ||
da51bb9b | 1384 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 1385 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
1386 | |
1387 | =cut | |
1388 | */ | |
1389 | ||
a0d0e21e | 1390 | HV* |
864dbfa3 | 1391 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 1392 | { |
7918f24d | 1393 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 1394 | return gv_stashpvn(name, strlen(name), create); |
1395 | } | |
1396 | ||
bc96cb06 SH |
1397 | /* |
1398 | =for apidoc gv_stashpvn | |
1399 | ||
da51bb9b NC |
1400 | Returns a pointer to the stash for a specified package. The C<namelen> |
1401 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
1402 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
1403 | created if it does not already exist. If the package does not exist and | |
796b6530 | 1404 | C<flags> is 0 (or any other setting that does not create packages) then C<NULL> |
da51bb9b NC |
1405 | is returned. |
1406 | ||
566a4718 YO |
1407 | Flags may be one of: |
1408 | ||
1409 | GV_ADD | |
1410 | SVf_UTF8 | |
1411 | GV_NOADD_NOINIT | |
1412 | GV_NOINIT | |
1413 | GV_NOEXPAND | |
1414 | GV_ADDMG | |
1415 | ||
796b6530 | 1416 | The most important of which are probably C<GV_ADD> and C<SVf_UTF8>. |
bc96cb06 | 1417 | |
808724c8 | 1418 | Note, use of C<gv_stashsv> instead of C<gv_stashpvn> where possible is strongly |
1419 | recommended for performance reasons. | |
1420 | ||
bc96cb06 SH |
1421 | =cut |
1422 | */ | |
1423 | ||
0eadbdad YO |
1424 | /* |
1425 | gv_stashpvn_internal | |
1426 | ||
1427 | Perform the internal bits of gv_stashsvpvn_cached. You could think of this | |
1428 | as being one half of the logic. Not to be called except from gv_stashsvpvn_cached(). | |
1429 | ||
1430 | */ | |
1431 | ||
4e7ebec5 | 1432 | PERL_STATIC_INLINE HV* |
0eadbdad | 1433 | S_gv_stashpvn_internal(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 1434 | { |
0cea0058 | 1435 | char smallbuf[128]; |
46fc3d4c | 1436 | char *tmpbuf; |
a0d0e21e LW |
1437 | HV *stash; |
1438 | GV *tmpgv; | |
add0ecde | 1439 | U32 tmplen = namelen + 2; |
dc437b57 | 1440 | |
0eadbdad | 1441 | PERL_ARGS_ASSERT_GV_STASHPVN_INTERNAL; |
7918f24d | 1442 | |
add0ecde | 1443 | if (tmplen <= sizeof smallbuf) |
46fc3d4c | 1444 | tmpbuf = smallbuf; |
1445 | else | |
add0ecde VP |
1446 | Newx(tmpbuf, tmplen, char); |
1447 | Copy(name, tmpbuf, namelen, char); | |
1448 | tmpbuf[namelen] = ':'; | |
1449 | tmpbuf[namelen+1] = ':'; | |
1450 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); | |
46fc3d4c | 1451 | if (tmpbuf != smallbuf) |
1452 | Safefree(tmpbuf); | |
d2fcb1d6 | 1453 | if (!tmpgv || !isGV_with_GP(tmpgv)) |
da51bb9b | 1454 | return NULL; |
a0d0e21e | 1455 | stash = GvHV(tmpgv); |
1f656fcf | 1456 | if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL; |
9efb5c72 | 1457 | assert(stash); |
1f656fcf | 1458 | if (!HvNAME_get(stash)) { |
0be4d16f | 1459 | hv_name_set(stash, name, namelen, flags & SVf_UTF8 ? SVf_UTF8 : 0 ); |
1f656fcf FC |
1460 | |
1461 | /* FIXME: This is a repeat of logic in gv_fetchpvn_flags */ | |
1462 | /* If the containing stash has multiple effective | |
1463 | names, see that this one gets them, too. */ | |
1464 | if (HvAUX(GvSTASH(tmpgv))->xhv_name_count) | |
1465 | mro_package_moved(stash, NULL, tmpgv, 1); | |
1466 | } | |
a0d0e21e | 1467 | return stash; |
463ee0b2 LW |
1468 | } |
1469 | ||
808724c8 | 1470 | /* |
1471 | gv_stashsvpvn_cached | |
1472 | ||
1473 | Returns a pointer to the stash for a specified package, possibly | |
48a81373 | 1474 | cached. Implements both C<gv_stashpvn> and C<gv_stashsv>. |
808724c8 | 1475 | |
1476 | Requires one of either namesv or namepv to be non-null. | |
1477 | ||
fbe13c60 | 1478 | See C<L</gv_stashpvn>> for details on "flags". |
808724c8 | 1479 | |
1480 | Note the sv interface is strongly preferred for performance reasons. | |
1481 | ||
1482 | */ | |
1483 | ||
1484 | #define PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED \ | |
1485 | assert(namesv || name) | |
1486 | ||
1487 | PERL_STATIC_INLINE HV* | |
1488 | S_gv_stashsvpvn_cached(pTHX_ SV *namesv, const char *name, U32 namelen, I32 flags) | |
4e7ebec5 | 1489 | { |
1490 | HV* stash; | |
808724c8 | 1491 | HE* he; |
1492 | ||
1493 | PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED; | |
1494 | ||
1495 | he = (HE *)hv_common( | |
1496 | PL_stashcache, namesv, name, namelen, | |
4e7ebec5 | 1497 | (flags & SVf_UTF8) ? HVhek_UTF8 : 0, 0, NULL, 0 |
1498 | ); | |
808724c8 | 1499 | |
4e7ebec5 | 1500 | if (he) return INT2PTR(HV*,SvIVX(HeVAL(he))); |
d283e876 | 1501 | else if (flags & GV_CACHE_ONLY) return NULL; |
4e7ebec5 | 1502 | |
808724c8 | 1503 | if (namesv) { |
1504 | if (SvOK(namesv)) { /* prevent double uninit warning */ | |
1505 | STRLEN len; | |
1506 | name = SvPV_const(namesv, len); | |
1507 | namelen = len; | |
1508 | flags |= SvUTF8(namesv); | |
1509 | } else { | |
1510 | name = ""; namelen = 0; | |
1511 | } | |
1512 | } | |
0eadbdad YO |
1513 | stash = gv_stashpvn_internal(name, namelen, flags); |
1514 | ||
4e7ebec5 | 1515 | if (stash && namelen) { |
1516 | SV* const ref = newSViv(PTR2IV(stash)); | |
0eadbdad | 1517 | (void)hv_store(PL_stashcache, name, |
4e7ebec5 | 1518 | (flags & SVf_UTF8) ? -(I32)namelen : (I32)namelen, ref, 0); |
1519 | } | |
808724c8 | 1520 | |
4e7ebec5 | 1521 | return stash; |
1522 | } | |
1523 | ||
808724c8 | 1524 | HV* |
1525 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) | |
1526 | { | |
1527 | PERL_ARGS_ASSERT_GV_STASHPVN; | |
1528 | return gv_stashsvpvn_cached(NULL, name, namelen, flags); | |
1529 | } | |
1530 | ||
954c1994 GS |
1531 | /* |
1532 | =for apidoc gv_stashsv | |
1533 | ||
fbe13c60 KW |
1534 | Returns a pointer to the stash for a specified package. See |
1535 | C<L</gv_stashpvn>>. | |
954c1994 | 1536 | |
fbe13c60 KW |
1537 | Note this interface is strongly preferred over C<gv_stashpvn> for performance |
1538 | reasons. | |
808724c8 | 1539 | |
954c1994 GS |
1540 | =cut |
1541 | */ | |
1542 | ||
a0d0e21e | 1543 | HV* |
da51bb9b | 1544 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 1545 | { |
7918f24d | 1546 | PERL_ARGS_ASSERT_GV_STASHSV; |
808724c8 | 1547 | return gv_stashsvpvn_cached(sv, NULL, 0, flags); |
a0d0e21e LW |
1548 | } |
1549 | ||
1550 | ||
463ee0b2 | 1551 | GV * |
fe9845cc | 1552 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) { |
7918f24d | 1553 | PERL_ARGS_ASSERT_GV_FETCHPV; |
b7787f18 | 1554 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
1555 | } |
1556 | ||
1557 | GV * | |
fe9845cc | 1558 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 1559 | STRLEN len; |
77cb3b01 FC |
1560 | const char * const nambeg = |
1561 | SvPV_flags_const(name, len, flags & GV_NO_SVGMAGIC ? 0 : SV_GMAGIC); | |
7918f24d | 1562 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
1563 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
1564 | } | |
1565 | ||
90aeefb4 | 1566 | PERL_STATIC_INLINE void |
290a1700 | 1567 | S_gv_magicalize_isa(pTHX_ GV *gv) |
ad7cce9f FR |
1568 | { |
1569 | AV* av; | |
1570 | ||
1571 | PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA; | |
1572 | ||
1573 | av = GvAVn(gv); | |
1574 | GvMULTI_on(gv); | |
1575 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, | |
1576 | NULL, 0); | |
ad7cce9f FR |
1577 | } |
1578 | ||
90aeefb4 BF |
1579 | /* This function grabs name and tries to split a stash and glob |
1580 | * from its contents. TODO better description, comments | |
1581 | * | |
1582 | * If the function returns TRUE and 'name == name_end', then | |
1583 | * 'gv' can be directly returned to the caller of gv_fetchpvn_flags | |
1584 | */ | |
1585 | PERL_STATIC_INLINE bool | |
1586 | S_parse_gv_stash_name(pTHX_ HV **stash, GV **gv, const char **name, | |
1587 | STRLEN *len, const char *nambeg, STRLEN full_len, | |
1588 | const U32 is_utf8, const I32 add) | |
1589 | { | |
1590 | const char *name_cursor; | |
1591 | const char *const name_end = nambeg + full_len; | |
1592 | const char *const name_em1 = name_end - 1; | |
1593 | ||
1594 | PERL_ARGS_ASSERT_PARSE_GV_STASH_NAME; | |
1595 | ||
1596 | if (full_len > 2 && **name == '*' && isIDFIRST_lazy_if(*name + 1, is_utf8)) { | |
1597 | /* accidental stringify on a GV? */ | |
1598 | (*name)++; | |
1599 | } | |
1600 | ||
1601 | for (name_cursor = *name; name_cursor < name_end; name_cursor++) { | |
1602 | if (name_cursor < name_em1 && | |
1603 | ((*name_cursor == ':' && name_cursor[1] == ':') | |
1604 | || *name_cursor == '\'')) | |
1605 | { | |
1606 | if (!*stash) | |
1607 | *stash = PL_defstash; | |
1608 | if (!*stash || !SvREFCNT(*stash)) /* symbol table under destruction */ | |
1609 | return FALSE; | |
1610 | ||
1611 | *len = name_cursor - *name; | |
1612 | if (name_cursor > nambeg) { /* Skip for initial :: or ' */ | |
1613 | const char *key; | |
1614 | GV**gvp; | |
1615 | if (*name_cursor == ':') { | |
1616 | key = *name; | |
1617 | *len += 2; | |
1618 | } | |
1619 | else { | |
1620 | char *tmpbuf; | |
1621 | Newx(tmpbuf, *len+2, char); | |
1622 | Copy(*name, tmpbuf, *len, char); | |
1623 | tmpbuf[(*len)++] = ':'; | |
1624 | tmpbuf[(*len)++] = ':'; | |
1625 | key = tmpbuf; | |
1626 | } | |
c161da64 | 1627 | gvp = (GV**)hv_fetch(*stash, key, is_utf8 ? -((I32)*len) : (I32)*len, add); |
90aeefb4 BF |
1628 | *gv = gvp ? *gvp : NULL; |
1629 | if (*gv && *gv != (const GV *)&PL_sv_undef) { | |
1630 | if (SvTYPE(*gv) != SVt_PVGV) | |
1631 | gv_init_pvn(*gv, *stash, key, *len, (add & GV_ADDMULTI)|is_utf8); | |
1632 | else | |
1633 | GvMULTI_on(*gv); | |
1634 | } | |
1635 | if (key != *name) | |
1636 | Safefree(key); | |
1637 | if (!*gv || *gv == (const GV *)&PL_sv_undef) | |
1638 | return FALSE; | |
1639 | ||
1640 | if (!(*stash = GvHV(*gv))) { | |
1641 | *stash = GvHV(*gv) = newHV(); | |
1642 | if (!HvNAME_get(*stash)) { | |
1643 | if (GvSTASH(*gv) == PL_defstash && *len == 6 | |
4c4f3c46 YO |
1644 | && strEQs(*name, "CORE")) |
1645 | hv_name_sets(*stash, "CORE", 0); | |
90aeefb4 BF |
1646 | else |
1647 | hv_name_set( | |
1648 | *stash, nambeg, name_cursor-nambeg, is_utf8 | |
1649 | ); | |
1650 | /* If the containing stash has multiple effective | |
1651 | names, see that this one gets them, too. */ | |
1652 | if (HvAUX(GvSTASH(*gv))->xhv_name_count) | |
1653 | mro_package_moved(*stash, NULL, *gv, 1); | |
1654 | } | |
1655 | } | |
1656 | else if (!HvNAME_get(*stash)) | |
1657 | hv_name_set(*stash, nambeg, name_cursor - nambeg, is_utf8); | |
1658 | } | |
1659 | ||
1660 | if (*name_cursor == ':') | |
1661 | name_cursor++; | |
1662 | *name = name_cursor+1; | |
1663 | if (*name == name_end) { | |
1664 | if (!*gv) | |
1665 | *gv = MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); | |
1666 | return TRUE; | |
1667 | } | |
1668 | } | |
1669 | } | |
1670 | *len = name_cursor - *name; | |
1671 | return TRUE; | |
1672 | } | |
1673 | ||
536d1a88 | 1674 | /* Checks if an unqualified name is in the main stash */ |
90aeefb4 | 1675 | PERL_STATIC_INLINE bool |
536d1a88 | 1676 | S_gv_is_in_main(pTHX_ const char *name, STRLEN len, const U32 is_utf8) |
90aeefb4 | 1677 | { |
536d1a88 | 1678 | PERL_ARGS_ASSERT_GV_IS_IN_MAIN; |
90aeefb4 | 1679 | |
90aeefb4 | 1680 | /* If it's an alphanumeric variable */ |
536d1a88 | 1681 | if ( len && isIDFIRST_lazy_if(name, is_utf8) ) { |
90aeefb4 BF |
1682 | /* Some "normal" variables are always in main::, |
1683 | * like INC or STDOUT. | |
1684 | */ | |
1685 | switch (len) { | |
1686 | case 1: | |
1687 | if (*name == '_') | |
536d1a88 | 1688 | return TRUE; |
90aeefb4 BF |
1689 | break; |
1690 | case 3: | |
1691 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1692 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1693 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
536d1a88 | 1694 | return TRUE; |
90aeefb4 BF |
1695 | break; |
1696 | case 4: | |
1697 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1698 | && name[3] == 'V') | |
536d1a88 | 1699 | return TRUE; |
90aeefb4 BF |
1700 | break; |
1701 | case 5: | |
1702 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1703 | && name[3] == 'I' && name[4] == 'N') | |
536d1a88 | 1704 | return TRUE; |
90aeefb4 BF |
1705 | break; |
1706 | case 6: | |
1707 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1708 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1709 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
536d1a88 | 1710 | return TRUE; |
90aeefb4 BF |
1711 | break; |
1712 | case 7: | |
1713 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1714 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1715 | && name[6] == 'T') | |
536d1a88 | 1716 | return TRUE; |
90aeefb4 BF |
1717 | break; |
1718 | } | |
536d1a88 BF |
1719 | } |
1720 | /* *{""}, or a special variable like $@ */ | |
1721 | else | |
1722 | return TRUE; | |
1723 | ||
1724 | return FALSE; | |
1725 | } | |
1726 | ||
1727 | ||
1728 | /* This function is called if parse_gv_stash_name() failed to | |
1729 | * find a stash, or if GV_NOTQUAL or an empty name was passed | |
1730 | * to gv_fetchpvn_flags. | |
1731 | * | |
1732 | * It returns FALSE if the default stash can't be found nor created, | |
1733 | * which might happen during global destruction. | |
1734 | */ | |
1735 | PERL_STATIC_INLINE bool | |
1736 | S_find_default_stash(pTHX_ HV **stash, const char *name, STRLEN len, | |
1737 | const U32 is_utf8, const I32 add, | |
1738 | const svtype sv_type) | |
1739 | { | |
1740 | PERL_ARGS_ASSERT_FIND_DEFAULT_STASH; | |
1741 | ||
1742 | /* No stash in name, so see how we can default */ | |
90aeefb4 | 1743 | |
536d1a88 BF |
1744 | if ( gv_is_in_main(name, len, is_utf8) ) { |
1745 | *stash = PL_defstash; | |
1746 | } | |
1747 | else { | |
1748 | if (IN_PERL_COMPILETIME) { | |
90aeefb4 BF |
1749 | *stash = PL_curstash; |
1750 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
1751 | sv_type != SVt_PVCV && | |
1752 | sv_type != SVt_PVGV && | |
1753 | sv_type != SVt_PVFM && | |
1754 | sv_type != SVt_PVIO && | |
1755 | !(len == 1 && sv_type == SVt_PV && | |
1756 | (*name == 'a' || *name == 'b')) ) | |
1757 | { | |
c161da64 | 1758 | GV**gvp = (GV**)hv_fetch(*stash,name,is_utf8 ? -(I32)len : (I32)len,0); |
90aeefb4 BF |
1759 | if (!gvp || *gvp == (const GV *)&PL_sv_undef || |
1760 | SvTYPE(*gvp) != SVt_PVGV) | |
1761 | { | |
1762 | *stash = NULL; | |
1763 | } | |
1764 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || | |
1765 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1766 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
1767 | { | |
1768 | /* diag_listed_as: Variable "%s" is not imported%s */ | |
1769 | Perl_ck_warner_d( | |
1770 | aTHX_ packWARN(WARN_MISC), | |
1771 | "Variable \"%c%"UTF8f"\" is not imported", | |
1772 | sv_type == SVt_PVAV ? '@' : | |
1773 | sv_type == SVt_PVHV ? '%' : '$', | |
1774 | UTF8fARG(is_utf8, len, name)); | |
1775 | if (GvCVu(*gvp)) | |
1776 | Perl_ck_warner_d( | |
1777 | aTHX_ packWARN(WARN_MISC), | |
1778 | "\t(Did you mean &%"UTF8f" instead?)\n", | |
1779 | UTF8fARG(is_utf8, len, name) | |
1780 | ); | |
1781 | *stash = NULL; | |
1782 | } | |
1783 | } | |
1784 | } | |
1785 | else { | |
1786 | /* Use the current op's stash */ | |
1787 | *stash = CopSTASH(PL_curcop); | |
1788 | } | |
1789 | } | |
90aeefb4 BF |
1790 | |
1791 | if (!*stash) { | |
1792 | if (add && !PL_in_clean_all) { | |
10860bf4 FC |
1793 | GV *gv; |
1794 | qerror(Perl_mess(aTHX_ | |
90aeefb4 | 1795 | "Global symbol \"%s%"UTF8f |
d8c6310a FC |
1796 | "\" requires explicit package name (did you forget to " |
1797 | "declare \"my %s%"UTF8f"\"?)", | |
1798 | (sv_type == SVt_PV ? "$" | |
1799 | : sv_type == SVt_PVAV ? "@" | |
1800 | : sv_type == SVt_PVHV ? "%" | |
1801 | : ""), UTF8fARG(is_utf8, len, name), | |
90aeefb4 BF |
1802 | (sv_type == SVt_PV ? "$" |
1803 | : sv_type == SVt_PVAV ? "@" | |
1804 | : sv_type == SVt_PVHV ? "%" | |
10860bf4 | 1805 | : ""), UTF8fARG(is_utf8, len, name))); |
cd164bf8 BF |
1806 | /* To maintain the output of errors after the strict exception |
1807 | * above, and to keep compat with older releases, rather than | |
1808 | * placing the variables in the pad, we place | |
1809 | * them in the <none>:: stash. | |
1810 | */ | |
90aeefb4 BF |
1811 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
1812 | if (!gv) { | |
1813 | /* symbol table under destruction */ | |
1814 | return FALSE; | |
1815 | } | |
1816 | *stash = GvHV(gv); | |
1817 | } | |
1818 | else | |
1819 | return FALSE; | |
1820 | } | |
1821 | ||
1822 | if (!SvREFCNT(*stash)) /* symbol table under destruction */ | |
1823 | return FALSE; | |
1824 | ||
1825 | return TRUE; | |
1826 | } | |
1827 | ||
8c995aba FC |
1828 | /* gv_magicalize only turns on the SVf_READONLY flag, not SVf_PROTECT. So |
1829 | redefine SvREADONLY_on for that purpose. We don’t use it later on in | |
1830 | this file. */ | |
1831 | #undef SvREADONLY_on | |
1832 | #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY) | |
1833 | ||
930867a8 BF |
1834 | /* gv_magicalize() is called by gv_fetchpvn_flags when creating |
1835 | * a new GV. | |
1836 | * Note that it does not insert the GV into the stash prior to | |
1837 | * magicalization, which some variables require need in order | |
1838 | * to work (like $[, %+, %-, %!), so callers must take care of | |
1321bbe3 | 1839 | * that. |
930867a8 | 1840 | * |
1321bbe3 FC |
1841 | * It returns true if the gv did turn out to be magical one; i.e., |
1842 | * if gv_magicalize actually did something. | |
930867a8 BF |
1843 | */ |
1844 | PERL_STATIC_INLINE bool | |
1845 | S_gv_magicalize(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, | |
1321bbe3 | 1846 | const svtype sv_type) |
79072805 | 1847 | { |
960b831f | 1848 | SSize_t paren; |
79072805 | 1849 | |
930867a8 | 1850 | PERL_ARGS_ASSERT_GV_MAGICALIZE; |
90aeefb4 | 1851 | |
44428a46 | 1852 | if (stash != PL_defstash) { /* not the main stash */ |
ea238638 | 1853 | /* We only have to check for a few names here: a, b, EXPORT, ISA |
4aaa4757 FC |
1854 | and VERSION. All the others apply only to the main stash or to |
1855 | CORE (which is checked right after this). */ | |
ea238638 | 1856 | if (len) { |
cc4c2da6 | 1857 | switch (*name) { |
cc4c2da6 | 1858 | case 'E': |
eafd371c YO |
1859 | if (memEQs(name, len, "EXPORT") |
1860 | ||memEQs(name, len, "EXPORT_OK") | |
1861 | ||memEQs(name, len, "EXPORT_FAIL") | |
1862 | ) | |
cc4c2da6 NC |
1863 | GvMULTI_on(gv); |
1864 | break; | |
1865 | case 'I': | |
eafd371c | 1866 | if (memEQs(name, len, "ISA")) |
290a1700 | 1867 | gv_magicalize_isa(gv); |
cc4c2da6 | 1868 | break; |
44428a46 | 1869 | case 'V': |
eafd371c | 1870 | if (memEQs(name, len, "VERSION")) |
44428a46 FC |
1871 | GvMULTI_on(gv); |
1872 | break; | |
ea238638 | 1873 | case 'a': |
eafd371c | 1874 | if (stash == PL_debstash && memEQs(name, len, "args")) { |
7bb33634 FC |
1875 | GvMULTI_on(gv_AVadd(gv)); |
1876 | break; | |
eafd371c YO |
1877 | } |
1878 | /* FALLTHROUGH */ | |
ea238638 FC |
1879 | case 'b': |
1880 | if (len == 1 && sv_type == SVt_PV) | |
1881 | GvMULTI_on(gv); | |
924ba076 | 1882 | /* FALLTHROUGH */ |
4aaa4757 FC |
1883 | default: |
1884 | goto try_core; | |
1885 | } | |
1321bbe3 | 1886 | goto ret; |
4aaa4757 FC |
1887 | } |
1888 | try_core: | |
1889 | if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) { | |
1890 | /* Avoid null warning: */ | |
1891 | const char * const stashname = HvNAME(stash); assert(stashname); | |
4c4f3c46 | 1892 | if (strEQs(stashname, "CORE")) |
87566176 | 1893 | S_maybe_add_coresub(aTHX_ 0, gv, name, len); |
44428a46 FC |
1894 | } |
1895 | } | |
1896 | else if (len > 1) { | |
1897 | #ifndef EBCDIC | |
1898 | if (*name > 'V' ) { | |
1899 | NOOP; | |
1900 | /* Nothing else to do. | |
1901 | The compiler will probably turn the switch statement into a | |
1902 | branch table. Make sure we avoid even that small overhead for | |
2ae25f5c KW |
1903 | the common case of lower case variable names. (On EBCDIC |
1904 | platforms, we can't just do: | |
1905 | if (NATIVE_TO_ASCII(*name) > NATIVE_TO_ASCII('V') ) { | |
1906 | because cases like '\027' in the switch statement below are | |
1907 | C1 (non-ASCII) controls on those platforms, so the remapping | |
1908 | would make them larger than 'V') | |
1909 | */ | |
44428a46 FC |
1910 | } else |
1911 | #endif | |
1912 | { | |
44428a46 FC |
1913 | switch (*name) { |
1914 | case 'A': | |
eafd371c | 1915 | if (memEQs(name, len, "ARGV")) { |
44428a46 FC |
1916 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
1917 | } | |
eafd371c | 1918 | else if (memEQs(name, len, "ARGVOUT")) { |
44428a46 FC |
1919 | GvMULTI_on(gv); |
1920 | } | |
1921 | break; | |
1922 | case 'E': | |
eafd371c | 1923 | if (memEQs(name, len, "EXPORT")) |
44428a46 FC |
1924 | GvMULTI_on(gv); |
1925 | break; | |
1926 | case 'I': | |
eafd371c | 1927 | if (memEQs(name, len, "ISA")) { |
290a1700 | 1928 | gv_magicalize_isa(gv); |
44428a46 FC |
1929 | } |
1930 | break; | |
cc4c2da6 | 1931 | case 'S': |
eafd371c | 1932 | if (memEQs(name, len, "SIG")) { |
cc4c2da6 NC |
1933 | HV *hv; |
1934 | I32 i; | |
d525a7b2 NC |
1935 | if (!PL_psig_name) { |
1936 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); | |
a02a5408 | 1937 | Newxz(PL_psig_pend, SIG_SIZE, int); |
d525a7b2 | 1938 | PL_psig_ptr = PL_psig_name + SIG_SIZE; |
0bdedcb3 NC |
1939 | } else { |
1940 | /* I think that the only way to get here is to re-use an | |
1941 | embedded perl interpreter, where the previous | |
1942 | use didn't clean up fully because | |
1943 | PL_perl_destruct_level was 0. I'm not sure that we | |
1944 | "support" that, in that I suspect in that scenario | |
1945 | there are sufficient other garbage values left in the | |
1946 | interpreter structure that something else will crash | |
1947 | before we get here. I suspect that this is one of | |
1948 | those "doctor, it hurts when I do this" bugs. */ | |
d525a7b2 | 1949 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); |
0bdedcb3 | 1950 | Zero(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 NC |
1951 | } |
1952 | GvMULTI_on(gv); | |
1953 | hv = GvHVn(gv); | |
a0714e2c | 1954 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 1955 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 1956 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
1957 | if (init) |
1958 | sv_setsv(*init, &PL_sv_undef); | |
cc4c2da6 NC |
1959 | } |
1960 | } | |
1961 | break; | |
1962 | case 'V': | |
eafd371c | 1963 | if (memEQs(name, len, "VERSION")) |
cc4c2da6 NC |
1964 | GvMULTI_on(gv); |
1965 | break; | |
e5218da5 | 1966 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
eafd371c | 1967 | if (memEQs(name, len, "\003HILD_ERROR_NATIVE")) |
e5218da5 GA |
1968 | goto magicalize; |
1969 | break; | |
cc4c2da6 | 1970 | case '\005': /* $^ENCODING */ |
eafd371c | 1971 | if (memEQs(name, len, "\005NCODING")) |
cc4c2da6 NC |
1972 | goto magicalize; |
1973 | break; | |
9ebf26ad | 1974 | case '\007': /* $^GLOBAL_PHASE */ |
eafd371c | 1975 | if (memEQs(name, len, "\007LOBAL_PHASE")) |
9ebf26ad FR |
1976 | goto ro_magicalize; |
1977 | break; | |
8561ea1d | 1978 | case '\014': /* $^LAST_FH */ |
eafd371c | 1979 | if (memEQs(name, len, "\014AST_FH")) |
8561ea1d FC |
1980 | goto ro_magicalize; |
1981 | break; | |
cde0cee5 | 1982 | case '\015': /* $^MATCH */ |
eafd371c | 1983 | if (memEQs(name, len, "\015ATCH")) { |
960b831f NC |
1984 | paren = RX_BUFF_IDX_CARET_FULLMATCH; |
1985 | goto storeparen; | |
1986 | } | |
66230c86 | 1987 | break; |
cc4c2da6 | 1988 | case '\017': /* $^OPEN */ |
eafd371c | 1989 | if (memEQs(name, len, "\017PEN")) |
cc4c2da6 NC |
1990 | goto magicalize; |
1991 | break; | |
cde0cee5 | 1992 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
eafd371c | 1993 | if (memEQs(name, len, "\020REMATCH")) { |
960b831f NC |
1994 | paren = RX_BUFF_IDX_CARET_PREMATCH; |
1995 | goto storeparen; | |
1996 | } | |
eafd371c | 1997 | if (memEQs(name, len, "\020OSTMATCH")) { |
960b831f NC |
1998 | paren = RX_BUFF_IDX_CARET_POSTMATCH; |
1999 | goto storeparen; | |
2000 | } | |
9ebf26ad | 2001 | break; |
cc4c2da6 | 2002 | case '\024': /* ${^TAINT} */ |
eafd371c | 2003 | if (memEQs(name, len, "\024AINT")) |
cc4c2da6 NC |
2004 | goto ro_magicalize; |
2005 | break; | |
7cebcbc0 | 2006 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
eafd371c | 2007 | if (memEQs(name, len, "\025NICODE")) |
cc4c2da6 | 2008 | goto ro_magicalize; |
eafd371c | 2009 | if (memEQs(name, len, "\025TF8LOCALE")) |
7cebcbc0 | 2010 | goto ro_magicalize; |
eafd371c | 2011 | if (memEQs(name, len, "\025TF8CACHE")) |
e07ea26a | 2012 | goto magicalize; |
cc4c2da6 NC |
2013 | break; |
2014 | case '\027': /* $^WARNING_BITS */ | |
eafd371c | 2015 | if (memEQs(name, len, "\027ARNING_BITS")) |
cc4c2da6 | 2016 | goto magicalize; |
8ca2a5d6 | 2017 | #ifdef WIN32 |
eafd371c | 2018 | else if (memEQs(name, len, "\027IN32_SLOPPY_STAT")) |
8ca2a5d6 DD |
2019 | goto magicalize; |
2020 | #endif | |
cc4c2da6 NC |
2021 | break; |
2022 | case '1': | |
2023 | case '2': | |
2024 | case '3': | |
2025 | case '4': | |
2026 | case '5': | |
2027 | case '6': | |
2028 | case '7': | |
2029 | case '8': | |
2030 | case '9': | |
85e6fe83 | 2031 | { |
2fdbfb4d AB |
2032 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
2033 | this test */ | |
22ff3130 HS |
2034 | UV uv; |
2035 | if (!grok_atoUV(name, &uv, NULL) || uv > I32_MAX) | |
1321bbe3 | 2036 | goto ret; |
22ff3130 HS |
2037 | /* XXX why are we using a SSize_t? */ |
2038 | paren = (SSize_t)(I32)uv; | |
960b831f | 2039 | goto storeparen; |
1d7c1841 | 2040 | } |
dc437b57 | 2041 | } |
93a17b20 | 2042 | } |
392db708 NC |
2043 | } else { |
2044 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
2045 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 | 2046 | switch (*name) { |
6361f656 | 2047 | case '&': /* $& */ |
960b831f NC |
2048 | paren = RX_BUFF_IDX_FULLMATCH; |
2049 | goto sawampersand; | |
6361f656 | 2050 | case '`': /* $` */ |
960b831f NC |
2051 | paren = RX_BUFF_IDX_PREMATCH; |
2052 | goto sawampersand; | |
6361f656 | 2053 | case '\'': /* $' */ |
960b831f NC |
2054 | paren = RX_BUFF_IDX_POSTMATCH; |
2055 | sawampersand: | |
1a904fc8 | 2056 | #ifdef PERL_SAWAMPERSAND |
a289ef89 | 2057 | if (!( |
cc4c2da6 NC |
2058 | sv_type == SVt_PVAV || |
2059 | sv_type == SVt_PVHV || | |
2060 | sv_type == SVt_PVCV || | |
2061 | sv_type == SVt_PVFM || | |
2062 | sv_type == SVt_PVIO | |
d3b97530 DM |
2063 | )) { PL_sawampersand |= |
2064 | (*name == '`') | |
2065 | ? SAWAMPERSAND_LEFT | |
2066 | : (*name == '&') | |
2067 | ? SAWAMPERSAND_MIDDLE | |
2068 | : SAWAMPERSAND_RIGHT; | |
2069 | } | |
1a904fc8 | 2070 | #endif |
960b831f | 2071 | goto storeparen; |
e91d8259 NC |
2072 | case '1': /* $1 */ |
2073 | case '2': /* $2 */ | |
2074 | case '3': /* $3 */ | |
2075 | case '4': /* $4 */ | |
2076 | case '5': /* $5 */ | |
2077 | case '6': /* $6 */ | |
2078 | case '7': /* $7 */ | |
2079 | case '8': /* $8 */ | |
2080 | case '9': /* $9 */ | |
960b831f NC |
2081 | paren = *name - '0'; |
2082 | ||
2083 | storeparen: | |
e91d8259 NC |
2084 | /* Flag the capture variables with a NULL mg_ptr |
2085 | Use mg_len for the array index to lookup. */ | |
960b831f | 2086 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, NULL, paren); |
e91d8259 | 2087 | break; |
cc4c2da6 | 2088 | |
6361f656 | 2089 | case ':': /* $: */ |
c69033f2 | 2090 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
2091 | goto magicalize; |
2092 | ||
6361f656 | 2093 | case '?': /* $? */ |
ff0cee69 | 2094 | #ifdef COMPLEX_STATUS |
c69033f2 | 2095 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 2096 | #endif |
cc4c2da6 | 2097 | goto magicalize; |
ff0cee69 | 2098 | |
6361f656 | 2099 | case '!': /* $! */ |
67261566 | 2100 | GvMULTI_on(gv); |
44a2ac75 | 2101 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 2102 | |
ad64d0ec | 2103 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 | 2104 | |
7c719134 | 2105 | /* magicalization must be done before require_tie_mod_s is called */ |
67261566 | 2106 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
7c719134 | 2107 | require_tie_mod_s(gv, '!', "Errno", 1); |
d2c93421 | 2108 | |
6cef1e77 | 2109 | break; |
754f85ad YO |
2110 | case '-': /* $-, %-, @- */ |
2111 | case '+': /* $+, %+, @+ */ | |
44a2ac75 YO |
2112 | GvMULTI_on(gv); /* no used once warnings here */ |
2113 | { | |
44a2ac75 | 2114 | AV* const av = GvAVn(gv); |
ad64d0ec | 2115 | SV* const avc = (*name == '+') ? MUTABLE_SV(av) : NULL; |
44a2ac75 | 2116 | |
ad64d0ec NC |
2117 | sv_magic(MUTABLE_SV(av), avc, PERL_MAGIC_regdata, NULL, 0); |
2118 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
67261566 | 2119 | if (avc) |
44a2ac75 | 2120 | SvREADONLY_on(GvSVn(gv)); |
44a2ac75 | 2121 | SvREADONLY_on(av); |
67261566 YO |
2122 | |
2123 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
7c719134 | 2124 | require_tie_mod_s(gv, *name, "Tie::Hash::NamedCapture",0); |
67261566 | 2125 | |
80305961 | 2126 | break; |
cc4c2da6 | 2127 | } |
6361f656 AB |
2128 | case '*': /* $* */ |
2129 | case '#': /* $# */ | |
9b387841 | 2130 | if (sv_type == SVt_PV) |
4f650b80 | 2131 | /* diag_listed_as: $* is no longer supported */ |
9b387841 | 2132 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, WARN_SYNTAX), |
4f650b80 | 2133 | "$%c is no longer supported", *name); |
8ae1fe26 | 2134 | break; |
b3ca2e83 NC |
2135 | case '\010': /* $^H */ |
2136 | { | |
2137 | HV *const hv = GvHVn(gv); | |
2138 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
2139 | } | |
2140 | goto magicalize; | |
b82b06b8 | 2141 | case '[': /* $[ */ |
7d69d4a6 | 2142 | if ((sv_type == SVt_PV || sv_type == SVt_PVGV) |
2846acbf | 2143 | && FEATURE_ARYBASE_IS_ENABLED) { |
7c719134 | 2144 | require_tie_mod_s(gv,'[',"arybase",0); |
b82b06b8 | 2145 | } |
7d69d4a6 | 2146 | else goto magicalize; |
b82b06b8 | 2147 | break; |
cc4c2da6 | 2148 | case '\023': /* $^S */ |
2fdbfb4d AB |
2149 | ro_magicalize: |
2150 | SvREADONLY_on(GvSVn(gv)); | |
924ba076 | 2151 | /* FALLTHROUGH */ |
6361f656 | 2152 | case '0': /* $0 */ |
6361f656 AB |
2153 | case '^': /* $^ */ |
2154 | case '~': /* $~ */ | |
2155 | case '=': /* $= */ | |
2156 | case '%': /* $% */ | |
2157 | case '.': /* $. */ | |
2158 | case '(': /* $( */ | |
2159 | case ')': /* $) */ | |
2160 | case '<': /* $< */ | |
2161 | case '>': /* $> */ | |
2162 | case '\\': /* $\ */ | |
2163 | case '/': /* $/ */ | |
4505a31f | 2164 | case '|': /* $| */ |
9cdac2a2 | 2165 | case '$': /* $$ */ |
cc4c2da6 NC |
2166 | case '\001': /* $^A */ |
2167 | case '\003': /* $^C */ | |
2168 | case '\004': /* $^D */ | |
2169 | case '\005': /* $^E */ | |
2170 | case '\006': /* $^F */ | |
cc4c2da6 NC |
2171 | case '\011': /* $^I, NOT \t in EBCDIC */ |
2172 | case '\016': /* $^N */ | |
2173 | case '\017': /* $^O */ | |
2174 | case '\020': /* $^P */ | |
2175 | case '\024': /* $^T */ | |
2176 | case '\027': /* $^W */ | |
2177 | magicalize: | |
ad64d0ec | 2178 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
cc4c2da6 | 2179 | break; |
e521374c | 2180 | |
cc4c2da6 | 2181 | case '\014': /* $^L */ |
76f68e9b | 2182 | sv_setpvs(GvSVn(gv),"\f"); |
463ee0b2 | 2183 | break; |
6361f656 | 2184 | case ';': /* $; */ |
76f68e9b | 2185 | sv_setpvs(GvSVn(gv),"\034"); |
463ee0b2 | 2186 | break; |
6361f656 | 2187 | case ']': /* $] */ |
cc4c2da6 | 2188 | { |
3638bf15 | 2189 | SV * const sv = GvSV(gv); |
d7aa5382 | 2190 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 2191 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
2192 | GvSV(gv) = vnumify(PL_patchlevel); |
2193 | SvREADONLY_on(GvSV(gv)); | |
2194 | SvREFCNT_dec(sv); | |
93a17b20 LW |
2195 | } |
2196 | break; | |
cc4c2da6 NC |
2197 | case '\026': /* $^V */ |
2198 | { | |
3638bf15 | 2199 | SV * const sv = GvSV(gv); |
f9be5ac8 DM |
2200 | GvSV(gv) = new_version(PL_patchlevel); |
2201 | SvREADONLY_on(GvSV(gv)); | |
2202 | SvREFCNT_dec(sv); | |
16070b82 GS |
2203 | } |
2204 | break; | |
ea238638 FC |
2205 | case 'a': |
2206 | case 'b': | |
dc3e91f6 | 2207 | if (sv_type == SVt_PV) |
ea238638 | 2208 | GvMULTI_on(gv); |
cc4c2da6 | 2209 | } |
79072805 | 2210 | } |
930867a8 | 2211 | |
1321bbe3 FC |
2212 | ret: |
2213 | /* Return true if we actually did something. */ | |
2214 | return GvAV(gv) || GvHV(gv) || GvIO(gv) || GvCV(gv) | |
2215 | || ( GvSV(gv) && ( | |
2216 | SvOK(GvSV(gv)) || SvMAGICAL(GvSV(gv)) | |
2217 | ) | |
2218 | ); | |
71c35c05 BF |
2219 | } |
2220 | ||
8c995aba FC |
2221 | /* If we do ever start using this later on in the file, we need to make |
2222 | sure we don’t accidentally use the wrong definition. */ | |
2223 | #undef SvREADONLY_on | |
2224 | ||
070dc475 BF |
2225 | /* This function is called when the stash already holds the GV of the magic |
2226 | * variable we're looking for, but we need to check that it has the correct | |
2227 | * kind of magic. For example, if someone first uses $! and then %!, the | |
2228 | * latter would end up here, and we add the Errno tie to the HASH slot of | |
2229 | * the *! glob. | |
2230 | */ | |
2231 | PERL_STATIC_INLINE void | |
2232 | S_maybe_multimagic_gv(pTHX_ GV *gv, const char *name, const svtype sv_type) | |
2233 | { | |
2234 | PERL_ARGS_ASSERT_MAYBE_MULTIMAGIC_GV; | |
2235 | ||
2236 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) { | |
2237 | if (*name == '!') | |
7c719134 | 2238 | require_tie_mod_s(gv, '!', "Errno", 1); |
070dc475 | 2239 | else if (*name == '-' || *name == '+') |
7c719134 | 2240 | require_tie_mod_s(gv, *name, "Tie::Hash::NamedCapture", 0); |
070dc475 BF |
2241 | } else if (sv_type == SVt_PV) { |
2242 | if (*name == '*' || *name == '#') { | |
2243 | /* diag_listed_as: $* is no longer supported */ | |
2244 | Perl_ck_warner_d(aTHX_ packWARN2(WARN_DEPRECATED, | |
2245 | WARN_SYNTAX), | |
2246 | "$%c is no longer supported", *name); | |
2247 | } | |
2248 | } | |
2249 | if (sv_type==SVt_PV || sv_type==SVt_PVGV) { | |
2250 | switch (*name) { | |
2251 | case '[': | |
7c719134 | 2252 | require_tie_mod_s(gv,'[',"arybase",0); |
070dc475 BF |
2253 | break; |
2254 | #ifdef PERL_SAWAMPERSAND | |
2255 | case '`': | |
2256 | PL_sawampersand |= SAWAMPERSAND_LEFT; | |
2257 | (void)GvSVn(gv); | |
2258 | break; | |
2259 | case '&': | |
2260 | PL_sawampersand |= SAWAMPERSAND_MIDDLE; | |
2261 | (void)GvSVn(gv); | |
2262 | break; | |
2263 | case '\'': | |
2264 | PL_sawampersand |= SAWAMPERSAND_RIGHT; | |
2265 | (void)GvSVn(gv); | |
2266 | break; | |
2267 | #endif | |
2268 | } | |
2269 | } | |
2270 | } | |
2271 | ||
71c35c05 BF |
2272 | GV * |
2273 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
2274 | const svtype sv_type) | |
2275 | { | |
71c35c05 BF |
2276 | const char *name = nambeg; |
2277 | GV *gv = NULL; | |
2278 | GV**gvp; | |
2279 | STRLEN len; | |
2280 | HV *stash = NULL; | |
2281 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); | |
2282 | const I32 no_expand = flags & GV_NOEXPAND; | |
2283 | const I32 add = flags & ~GV_NOADD_MASK; | |
2284 | const U32 is_utf8 = flags & SVf_UTF8; | |
930867a8 | 2285 | bool addmg = cBOOL(flags & GV_ADDMG); |
71c35c05 BF |
2286 | const char *const name_end = nambeg + full_len; |
2287 | U32 faking_it; | |
2288 | ||
2289 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; | |
2290 | ||
2291 | /* If we have GV_NOTQUAL, the caller promised that | |
2292 | * there is no stash, so we can skip the check. | |
2293 | * Similarly if full_len is 0, since then we're | |
2294 | * dealing with something like *{""} or ""->foo() | |
2295 | */ | |
2296 | if ((flags & GV_NOTQUAL) || !full_len) { | |
2297 | len = full_len; | |
2298 | } | |
2299 | else if (parse_gv_stash_name(&stash, &gv, &name, &len, nambeg, full_len, is_utf8, add)) { | |
2300 | if (name == name_end) return gv; | |
2301 | } | |
2302 | else { | |
2303 | return NULL; | |
2304 | } | |
2305 | ||
2306 | if (!stash && !find_default_stash(&stash, name, len, is_utf8, add, sv_type)) { | |
2307 | return NULL; | |
2308 | } | |
2309 | ||
2310 | /* By this point we should have a stash and a name */ | |
c161da64 | 2311 | gvp = (GV**)hv_fetch(stash,name,is_utf8 ? -(I32)len : (I32)len,add); |
71c35c05 BF |
2312 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) { |
2313 | if (addmg) gv = (GV *)newSV(0); | |
2314 | else return NULL; | |
2315 | } | |
2316 | else gv = *gvp, addmg = 0; | |
2317 | /* From this point on, addmg means gv has not been inserted in the | |
2318 | symtab yet. */ | |
2319 | ||
2320 | if (SvTYPE(gv) == SVt_PVGV) { | |
c002ae9a BF |
2321 | /* The GV already exists, so return it, but check if we need to do |
2322 | * anything else with it before that. | |
2323 | */ | |
71c35c05 | 2324 | if (add) { |
c002ae9a BF |
2325 | /* This is the heuristic that handles if a variable triggers the |
2326 | * 'used only once' warning. If there's already a GV in the stash | |
2327 | * with this name, then we assume that the variable has been used | |
2328 | * before and turn its MULTI flag on. | |
2329 | * It's a heuristic because it can easily be "tricked", like with | |
2330 | * BEGIN { $a = 1; $::{foo} = *a }; () = $foo | |
2331 | * not warning about $main::foo being used just once | |
2332 | */ | |
71c35c05 BF |
2333 | GvMULTI_on(gv); |
2334 | gv_init_svtype(gv, sv_type); | |
2335 | /* You reach this path once the typeglob has already been created, | |
2336 | either by the same or a different sigil. If this path didn't | |
2337 | exist, then (say) referencing $! first, and %! second would | |
2338 | mean that %! was not handled correctly. */ | |
2339 | if (len == 1 && stash == PL_defstash) { | |
070dc475 | 2340 | maybe_multimagic_gv(gv, name, sv_type); |
71c35c05 BF |
2341 | } |
2342 | else if (len == 3 && sv_type == SVt_PVAV | |
eafd371c | 2343 | && strEQs(name, "ISA") |
71c35c05 BF |
2344 | && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv)))) |
2345 | gv_magicalize_isa(gv); | |
2346 | } | |
2347 | return gv; | |
2348 | } else if (no_init) { | |
2349 | assert(!addmg); | |
2350 | return gv; | |
c002ae9a BF |
2351 | } |
2352 | /* If GV_NOEXPAND is true and what we got off the stash is a ref, | |
2353 | * don't expand it to a glob. This is an optimization so that things | |
2354 | * copying constants over, like Exporter, don't have to be rewritten | |
2355 | * to take into account that you can store more than just globs in | |
2356 | * stashes. | |
2357 | */ | |
2358 | else if (no_expand && SvROK(gv)) { | |
71c35c05 BF |
2359 | assert(!addmg); |
2360 | return gv; | |
2361 | } | |
2362 | ||
2363 | /* Adding a new symbol. | |
2364 | Unless of course there was already something non-GV here, in which case | |
2365 | we want to behave as if there was always a GV here, containing some sort | |
2366 | of subroutine. | |
2367 | Otherwise we run the risk of creating things like GvIO, which can cause | |
2368 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
2369 | ||
2370 | faking_it = SvOK(gv); | |
2371 | ||
2372 | if (add & GV_ADDWARN) | |
2373 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
2374 | "Had to create %"UTF8f" unexpectedly", | |
2375 | UTF8fARG(is_utf8, name_end-nambeg, nambeg)); | |
2376 | gv_init_pvn(gv, stash, name, len, (add & GV_ADDMULTI)|is_utf8); | |
2377 | ||
9e5de6ae | 2378 | if ( isIDFIRST_lazy_if(name, is_utf8) && !ckWARN(WARN_ONCE) ) |
71c35c05 BF |
2379 | GvMULTI_on(gv) ; |
2380 | ||
2381 | /* set up magic where warranted */ | |
1321bbe3 | 2382 | if ( gv_magicalize(gv, stash, name, len, sv_type) ) { |
930867a8 | 2383 | /* See 23496c6 */ |
1321bbe3 FC |
2384 | if (addmg) { |
2385 | /* gv_magicalize magicalised this gv, so we want it | |
930867a8 | 2386 | * stored in the symtab. |
1321bbe3 FC |
2387 | * Effectively the caller is asking, ‘Does this gv exist?’ |
2388 | * And we respond, ‘Er, *now* it does!’ | |
930867a8 BF |
2389 | */ |
2390 | (void)hv_store(stash,name,len,(SV *)gv,0); | |
1321bbe3 FC |
2391 | } |
2392 | } | |
2393 | else if (addmg) { | |
2394 | /* The temporary GV created above */ | |
930867a8 BF |
2395 | SvREFCNT_dec_NN(gv); |
2396 | gv = NULL; | |
930867a8 | 2397 | } |
71c35c05 | 2398 | |
e6066781 | 2399 | if (gv) gv_init_svtype(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 | 2400 | return gv; |
79072805 LW |
2401 | } |
2402 | ||
2403 | void | |
35a4481c | 2404 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2405 | { |
ed60a868 | 2406 | const char *name; |
35a4481c | 2407 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
2408 | |
2409 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
2410 | ||
666ea192 | 2411 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 2412 | |
52a6327b | 2413 | if (hv && (name = HvNAME(hv))) { |
ed60a868 FC |
2414 | const STRLEN len = HvNAMELEN(hv); |
2415 | if (keepmain || strnNE(name, "main", len)) { | |
2416 | sv_catpvn_flags(sv,name,len,HvNAMEUTF8(hv)?SV_CATUTF8:SV_CATBYTES); | |
396482e1 | 2417 | sv_catpvs(sv,"::"); |
ed60a868 | 2418 | } |
43693395 | 2419 | } |
ed60a868 | 2420 | else sv_catpvs(sv,"__ANON__::"); |
04f3bf56 | 2421 | sv_catsv(sv,sv_2mortal(newSVhek(GvNAME_HEK(gv)))); |
43693395 GS |
2422 | } |
2423 | ||
2424 | void | |
35a4481c | 2425 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2426 | { |
099be4f1 | 2427 | const GV * const egv = GvEGVx(gv); |
7918f24d NC |
2428 | |
2429 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
2430 | ||
46c461b5 | 2431 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
2432 | } |
2433 | ||
39a65960 DM |
2434 | |
2435 | /* recursively scan a stash and any nested stashes looking for entries | |
2436 | * that need the "only used once" warning raised | |
2437 | */ | |
2438 | ||
79072805 | 2439 | void |
51da40ed | 2440 | Perl_gv_check(pTHX_ HV *stash) |
79072805 | 2441 | { |
eb578fdb | 2442 | I32 i; |
463ee0b2 | 2443 | |
7918f24d NC |
2444 | PERL_ARGS_ASSERT_GV_CHECK; |
2445 | ||
9e5cda6b | 2446 | if (!SvOOK(stash)) |
8990e307 | 2447 | return; |
90754377 | 2448 | |
9e5cda6b | 2449 | assert(HvARRAY(stash)); |
90754377 | 2450 | |
a0d0e21e | 2451 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 2452 | const HE *entry; |
90754377 | 2453 | /* mark stash is being scanned, to avoid recursing */ |
339441ef | 2454 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_SCAN_STASH; |
dc437b57 | 2455 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
eb578fdb | 2456 | GV *gv; |
b7787f18 | 2457 | HV *hv; |
e7acdfe9 DM |
2458 | STRLEN keylen = HeKLEN(entry); |
2459 | const char * const key = HeKEY(entry); | |
2460 | ||
2461 | if (keylen >= 2 && key[keylen-2] == ':' && key[keylen-1] == ':' && | |
159b6efe | 2462 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 2463 | { |
90754377 DM |
2464 | if (hv != PL_defstash && hv != stash |
2465 | && !(SvOOK(hv) | |
2466 | && (HvAUX(hv)->xhv_aux_flags & HvAUXf_SCAN_STASH)) | |
2467 | ) | |
a0d0e21e LW |
2468 | gv_check(hv); /* nested package */ |
2469 | } | |
ecad31f0 BF |
2470 | else if ( *HeKEY(entry) != '_' |
2471 | && isIDFIRST_lazy_if(HeKEY(entry), HeUTF8(entry)) ) { | |
e1ec3a88 | 2472 | const char *file; |
159b6efe | 2473 | gv = MUTABLE_GV(HeVAL(entry)); |
55d729e4 | 2474 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 2475 | continue; |
1d7c1841 | 2476 | file = GvFILE(gv); |
1d7c1841 | 2477 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1dc74fdb FC |
2478 | #ifdef USE_ITHREADS |
2479 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ | |
2480 | #else | |
2481 | CopFILEGV(PL_curcop) | |
2482 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
2483 | #endif | |
9014280d | 2484 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
d0c0e7dd FC |
2485 | "Name \"%"HEKf"::%"HEKf |
2486 | "\" used only once: possible typo", | |
2487 | HEKfARG(HvNAME_HEK(stash)), | |
2488 | HEKfARG(GvNAME_HEK(gv))); | |
463ee0b2 | 2489 | } |
79072805 | 2490 | } |
339441ef | 2491 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_SCAN_STASH; |
79072805 LW |
2492 | } |
2493 | } | |
2494 | ||
2495 | GV * | |
9cc50d5b | 2496 | Perl_newGVgen_flags(pTHX_ const char *pack, U32 flags) |
79072805 | 2497 | { |
9cc50d5b | 2498 | PERL_ARGS_ASSERT_NEWGVGEN_FLAGS; |
b17a0679 | 2499 | assert(!(flags & ~SVf_UTF8)); |
7918f24d | 2500 | |
b17a0679 FC |
2501 | return gv_fetchpv(Perl_form(aTHX_ "%"UTF8f"::_GEN_%ld", |
2502 | UTF8fARG(flags, strlen(pack), pack), | |
9cc50d5b BF |
2503 | (long)PL_gensym++), |
2504 | GV_ADD, SVt_PVGV); | |
79072805 LW |
2505 | } |
2506 | ||
2507 | /* hopefully this is only called on local symbol table entries */ | |
2508 | ||
2509 | GP* | |
864dbfa3 | 2510 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 2511 | { |
1d7c1841 | 2512 | if (!gp) |
d4c19fe8 | 2513 | return NULL; |
79072805 | 2514 | gp->gp_refcnt++; |
44a8e56a | 2515 | if (gp->gp_cv) { |
2516 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
2517 | /* If the GP they asked for a reference to contains |
2518 | a method cache entry, clear it first, so that we | |
2519 | don't infect them with our cached entry */ | |
e7881358 | 2520 | SvREFCNT_dec_NN(gp->gp_cv); |
601f1833 | 2521 | gp->gp_cv = NULL; |
44a8e56a | 2522 | gp->gp_cvgen = 0; |
2523 | } | |
44a8e56a | 2524 | } |
79072805 | 2525 | return gp; |
79072805 LW |
2526 | } |
2527 | ||
2528 | void | |
864dbfa3 | 2529 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 2530 | { |
79072805 | 2531 | GP* gp; |
b0d55c99 | 2532 | int attempts = 100; |
79072805 | 2533 | |
f7877b28 | 2534 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 2535 | return; |
f248d071 | 2536 | if (gp->gp_refcnt == 0) { |
9b387841 NC |
2537 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
2538 | "Attempt to free unreferenced glob pointers" | |
2539 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
2540 | return; |
2541 | } | |
4571f4a7 | 2542 | if (gp->gp_refcnt > 1) { |
bc81b34d | 2543 | borrowed: |
748a9306 LW |
2544 | if (gp->gp_egv == gv) |
2545 | gp->gp_egv = 0; | |
4571f4a7 | 2546 | gp->gp_refcnt--; |
c43ae56f | 2547 | GvGP_set(gv, NULL); |
79072805 | 2548 | return; |
748a9306 | 2549 | } |
79072805 | 2550 | |
b0d55c99 FC |
2551 | while (1) { |
2552 | /* Copy and null out all the glob slots, so destructors do not see | |
2553 | freed SVs. */ | |
2554 | HEK * const file_hek = gp->gp_file_hek; | |
2555 | SV * const sv = gp->gp_sv; | |
2556 | AV * const av = gp->gp_av; | |
2557 | HV * const hv = gp->gp_hv; | |
2558 | IO * const io = gp->gp_io; | |
2559 | CV * const cv = gp->gp_cv; | |
2560 | CV * const form = gp->gp_form; | |
2561 | ||
2562 | gp->gp_file_hek = NULL; | |
2563 | gp->gp_sv = NULL; | |
2564 | gp->gp_av = NULL; | |
2565 | gp->gp_hv = NULL; | |
2566 | gp->gp_io = NULL; | |
2567 | gp->gp_cv = NULL; | |
2568 | gp->gp_form = NULL; | |
2569 | ||
2570 | if (file_hek) | |
2571 | unshare_hek(file_hek); | |
2572 | ||
2573 | SvREFCNT_dec(sv); | |
2574 | SvREFCNT_dec(av); | |
2575 | /* FIXME - another reference loop GV -> symtab -> GV ? | |
2576 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
2577 | if (hv && SvTYPE(hv) == SVt_PVHV) { | |
c2242065 | 2578 | const HEK *hvname_hek = HvNAME_HEK(hv); |
923ed580 FC |
2579 | if (PL_stashcache && hvname_hek) { |
2580 | DEBUG_o(Perl_deb(aTHX_ | |
2581 | "gp_free clearing PL_stashcache for '%"HEKf"'\n", | |
2582 | HEKfARG(hvname_hek))); | |
0ca9877d | 2583 | (void)hv_deletehek(PL_stashcache, hvname_hek, G_DISCARD); |
923ed580 | 2584 | } |
b0d55c99 FC |
2585 | SvREFCNT_dec(hv); |
2586 | } | |
96d7c888 FC |
2587 | if (io && SvREFCNT(io) == 1 && IoIFP(io) |
2588 | && (IoTYPE(io) == IoTYPE_WRONLY || | |
2589 | IoTYPE(io) == IoTYPE_RDWR || | |
2590 | IoTYPE(io) == IoTYPE_APPEND) | |
2591 | && ckWARN_d(WARN_IO) | |
2592 | && IoIFP(io) != PerlIO_stdin() | |
2593 | && IoIFP(io) != PerlIO_stdout() | |
2594 | && IoIFP(io) != PerlIO_stderr() | |
2595 | && !(IoFLAGS(io) & IOf_FAKE_DIRP)) | |
2596 | io_close(io, gv, FALSE, TRUE); | |
b0d55c99 FC |
2597 | SvREFCNT_dec(io); |
2598 | SvREFCNT_dec(cv); | |
2599 | SvREFCNT_dec(form); | |
2600 | ||
bc81b34d FC |
2601 | /* Possibly reallocated by a destructor */ |
2602 | gp = GvGP(gv); | |
2603 | ||
b0d55c99 FC |
2604 | if (!gp->gp_file_hek |
2605 | && !gp->gp_sv | |
2606 | && !gp->gp_av | |
2607 | && !gp->gp_hv | |
2608 | && !gp->gp_io | |
2609 | && !gp->gp_cv | |
2610 | && !gp->gp_form) break; | |
2611 | ||
2612 | if (--attempts == 0) { | |
2613 | Perl_die(aTHX_ | |
2614 | "panic: gp_free failed to free glob pointer - " | |
2615 | "something is repeatedly re-creating entries" | |
2616 | ); | |
2617 | } | |
13207a71 | 2618 | } |
748a9306 | 2619 | |
bc81b34d FC |
2620 | /* Possibly incremented by a destructor doing glob assignment */ |
2621 | if (gp->gp_refcnt > 1) goto borrowed; | |
79072805 | 2622 | Safefree(gp); |
c43ae56f | 2623 | GvGP_set(gv, NULL); |
79072805 LW |
2624 | } |
2625 | ||
d460ef45 NIS |
2626 | int |
2627 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
2628 | { | |
53c1dcc0 AL |
2629 | AMT * const amtp = (AMT*)mg->mg_ptr; |
2630 | PERL_UNUSED_ARG(sv); | |
dd374669 | 2631 | |
7918f24d NC |
2632 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
2633 | ||
d460ef45 NIS |
2634 | if (amtp && AMT_AMAGIC(amtp)) { |
2635 | int i; | |
2636 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 2637 | CV * const cv = amtp->table[i]; |
b37c2d43 | 2638 | if (cv) { |
e7881358 | 2639 | SvREFCNT_dec_NN(MUTABLE_SV(cv)); |
601f1833 | 2640 | amtp->table[i] = NULL; |
d460ef45 NIS |
2641 | } |
2642 | } | |
2643 | } | |
2644 | return 0; | |
2645 | } | |
2646 | ||
a0d0e21e | 2647 | /* Updates and caches the CV's */ |
c3a9a790 RGS |
2648 | /* Returns: |
2649 | * 1 on success and there is some overload | |
2650 | * 0 if there is no overload | |
2651 | * -1 if some error occurred and it couldn't croak | |
2652 | */ | |
a0d0e21e | 2653 | |
c3a9a790 | 2654 | int |
242f8760 | 2655 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e | 2656 | { |
ad64d0ec | 2657 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 | 2658 | AMT amt; |
9b439311 | 2659 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 2660 | U32 newgen; |
a0d0e21e | 2661 | |
7918f24d NC |
2662 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
2663 | ||
9b439311 | 2664 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
2665 | if (mg) { |
2666 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
66978156 | 2667 | if (amtp->was_ok_sub == newgen) { |
8c34e50d | 2668 | return AMT_AMAGIC(amtp) ? 1 : 0; |
14899595 | 2669 | } |
ad64d0ec | 2670 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 | 2671 | } |
a0d0e21e | 2672 | |
bfcb3514 | 2673 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 2674 | |
d460ef45 | 2675 | Zero(&amt,1,AMT); |
e1a479c5 | 2676 | amt.was_ok_sub = newgen; |
a6006777 | 2677 | amt.fallback = AMGfallNO; |
2678 | amt.flags = 0; | |
2679 | ||
a6006777 | 2680 | { |
8c34e50d FC |
2681 | int filled = 0; |
2682 | int i; | |
3d147ac2 DM |
2683 | bool deref_seen = 0; |
2684 | ||
a6006777 | 2685 | |
3866ea3b | 2686 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 2687 | |
89ffc314 | 2688 | /* Try to find via inheritance. */ |
e6919483 | 2689 | GV *gv = gv_fetchmeth_pvn(stash, PL_AMG_names[0], 2, -1, 0); |
3866ea3b | 2690 | SV * const sv = gv ? GvSV(gv) : NULL; |
53c1dcc0 | 2691 | CV* cv; |
89ffc314 IZ |
2692 | |
2693 | if (!gv) | |
3866ea3b FC |
2694 | { |
2695 | if (!gv_fetchmeth_pvn(stash, "((", 2, -1, 0)) | |
8c34e50d | 2696 | goto no_table; |
3866ea3b FC |
2697 | } |
2698 | #ifdef PERL_DONT_CREATE_GVSV | |
2699 | else if (!sv) { | |
6f207bd3 | 2700 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
3866ea3b FC |
2701 | } |
2702 | #endif | |
79c9643d JL |
2703 | else if (SvTRUE(sv)) |
2704 | /* don't need to set overloading here because fallback => 1 | |
2705 | * is the default setting for classes without overloading */ | |
89ffc314 | 2706 | amt.fallback=AMGfallYES; |
79c9643d JL |
2707 | else if (SvOK(sv)) { |
2708 | amt.fallback=AMGfallNEVER; | |
386a5489 | 2709 | filled = 1; |
386a5489 | 2710 | } |
79c9643d | 2711 | else { |
386a5489 | 2712 | filled = 1; |
386a5489 | 2713 | } |
a6006777 | 2714 | |
3d147ac2 | 2715 | assert(SvOOK(stash)); |
3d147ac2 | 2716 | /* initially assume the worst */ |
339441ef | 2717 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_NO_DEREF; |
3d147ac2 | 2718 | |
8c34e50d | 2719 | for (i = 1; i < NofAMmeth; i++) { |
6136c704 | 2720 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 2721 | /* Human-readable form, for debugging: */ |
8c34e50d | 2722 | const char * const cp = AMG_id2name(i); |
d279ab82 | 2723 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 | 2724 | |
a0288114 | 2725 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 2726 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
2727 | /* don't fill the cache while looking up! |
2728 | Creation of inheritance stubs in intermediate packages may | |
2729 | conflict with the logic of runtime method substitution. | |
2730 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
2731 | then we could have created stubs for "(+0" in A and C too. | |
2732 | But if B overloads "bool", we may want to use it for | |
2733 | numifying instead of C's "+0". */ | |
8c34e50d | 2734 | gv = Perl_gv_fetchmeth_pvn(aTHX_ stash, cooky, l, -1, 0); |
46fc3d4c | 2735 | cv = 0; |
c3ad4e54 FC |
2736 | if (gv && (cv = GvCV(gv)) && CvHASGV(cv)) { |
2737 | const HEK * const gvhek = | |
2738 | CvNAMED(cv) ? CvNAME_HEK(cv) : GvNAME_HEK(CvGV(cv)); | |
2739 | const HEK * const stashek = | |
2740 | HvNAME_HEK(CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv))); | |
2741 | if (HEK_LEN(gvhek) == 3 && strEQ(HEK_KEY(gvhek), "nil") | |
2742 | && stashek && HEK_LEN(stashek) == 8 | |
2743 | && strEQ(HEK_KEY(stashek), "overload")) { | |
611c1e95 IZ |
2744 | /* This is a hack to support autoloading..., while |
2745 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 2746 | /* GvSV contains the name of the method. */ |
6136c704 | 2747 | GV *ngv = NULL; |
c69033f2 | 2748 | SV *gvsv = GvSV(gv); |
a0288114 AL |
2749 | |
2750 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%"SVf256\ | |
2751 | "\" for overloaded \"%s\" in package \"%.256s\"\n", | |
f0e9f182 | 2752 | (void*)GvSV(gv), cp, HvNAME(stash)) ); |
c69033f2 | 2753 | if (!gvsv || !SvPOK(gvsv) |
7f415459 | 2754 | || !(ngv = gv_fetchmethod_sv_flags(stash, gvsv, 0))) |
dc848c6f | 2755 | { |
a0288114 | 2756 | /* Can be an import stub (created by "can"). */ |
242f8760 | 2757 | if (destructing) { |
c3a9a790 | 2758 | return -1; |
242f8760 RGS |
2759 | } |
2760 | else { | |
d66cca07 BF |
2761 | const SV * const name = (gvsv && SvPOK(gvsv)) |
2762 | ? gvsv | |
2763 | : newSVpvs_flags("???", SVs_TEMP); | |
dcbac5bb | 2764 | /* diag_listed_as: Can't resolve method "%s" overloading "%s" in package "%s" */ |
d66cca07 BF |
2765 | Perl_croak(aTHX_ "%s method \"%"SVf256 |
2766 | "\" overloading \"%s\" "\ | |
d0c0e7dd | 2767 | "in package \"%"HEKf256"\"", |
242f8760 RGS |
2768 | (GvCVGEN(gv) ? "Stub found while resolving" |
2769 | : "Can't resolve"), | |
d66cca07 | 2770 | SVfARG(name), cp, |
d0c0e7dd | 2771 | HEKfARG( |
d66cca07 | 2772 | HvNAME_HEK(stash) |
d0c0e7dd | 2773 | )); |
242f8760 | 2774 | } |
44a8e56a | 2775 | } |
dc848c6f | 2776 | cv = GvCV(gv = ngv); |
44a8e56a | 2777 | } |
b464bac0 | 2778 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 2779 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 2780 | GvNAME(CvGV(cv))) ); |
2781 | filled = 1; | |
611c1e95 | 2782 | } else if (gv) { /* Autoloaded... */ |
ea726b52 | 2783 | cv = MUTABLE_CV(gv); |
611c1e95 | 2784 | filled = 1; |
44a8e56a | 2785 | } |
ea726b52 | 2786 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); |
3d147ac2 DM |
2787 | |
2788 | if (gv) { | |
2789 | switch (i) { | |
2790 | case to_sv_amg: | |
2791 | case to_av_amg: | |
2792 | case to_hv_amg: | |
2793 | case to_gv_amg: | |
2794 | case to_cv_amg: | |
2795 | case nomethod_amg: | |
2796 | deref_seen = 1; | |
2797 | break; | |
2798 | } | |
2799 | } | |
a0d0e21e | 2800 | } |
3d147ac2 | 2801 | if (!deref_seen) |
45479970 DM |
2802 | /* none of @{} etc overloaded; we can do $obj->[N] quicker. |
2803 | * NB - aux var invalid here, HvARRAY() could have been | |
2804 | * reallocated since it was assigned to */ | |
2805 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_NO_DEREF; | |
3d147ac2 | 2806 | |
a0d0e21e | 2807 | if (filled) { |
a6006777 | 2808 | AMT_AMAGIC_on(&amt); |
ad64d0ec | 2809 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2810 | (char*)&amt, sizeof(AMT)); |
8c34e50d | 2811 | return TRUE; |
a0d0e21e LW |
2812 | } |
2813 | } | |
a6006777 | 2814 | /* Here we have no table: */ |
8c34e50d | 2815 | no_table: |
a6006777 | 2816 | AMT_AMAGIC_off(&amt); |
ad64d0ec | 2817 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2818 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 | 2819 | return 0; |
a0d0e21e LW |
2820 | } |
2821 | ||
32251b26 IZ |
2822 | |
2823 | CV* | |
2824 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
2825 | { | |
3f8f4626 | 2826 | MAGIC *mg; |
32251b26 | 2827 | AMT *amtp; |
e1a479c5 | 2828 | U32 newgen; |
9b439311 | 2829 | struct mro_meta* stash_meta; |
32251b26 | 2830 | |
bfcb3514 | 2831 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 2832 | return NULL; |
e1a479c5 | 2833 | |
9b439311 BB |
2834 | stash_meta = HvMROMETA(stash); |
2835 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 2836 | |
ad64d0ec | 2837 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
2838 | if (!mg) { |
2839 | do_update: | |
8c34e50d | 2840 | if (Gv_AMupdate(stash, 0) == -1) |
242f8760 | 2841 | return NULL; |
ad64d0ec | 2842 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 | 2843 | } |
a9fd4e40 | 2844 | assert(mg); |
32251b26 | 2845 | amtp = (AMT*)mg->mg_ptr; |
66978156 | 2846 | if ( amtp->was_ok_sub != newgen ) |
32251b26 | 2847 | goto do_update; |
3ad83ce7 | 2848 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 2849 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
2850 | if (ret && isGV(ret)) { /* Autoloading stab */ |
2851 | /* Passing it through may have resulted in a warning | |
2852 | "Inherited AUTOLOAD for a non-method deprecated", since | |
2853 | our caller is going through a function call, not a method call. | |
2854 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 2855 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
2856 | |
2857 | if (gv && GvCV(gv)) | |
2858 | return GvCV(gv); | |
2859 | } | |
2860 | return ret; | |
2861 | } | |
a0288114 | 2862 | |
601f1833 | 2863 | return NULL; |
32251b26 IZ |
2864 | } |
2865 | ||
2866 | ||
6f1401dc DM |
2867 | /* Implement tryAMAGICun_MG macro. |
2868 | Do get magic, then see if the stack arg is overloaded and if so call it. | |
2869 | Flags: | |
2870 | AMGf_set return the arg using SETs rather than assigning to | |
2871 | the targ | |
2872 | AMGf_numeric apply sv_2num to the stack arg. | |
2873 | */ | |
2874 | ||
2875 | bool | |
2876 | Perl_try_amagic_un(pTHX_ int method, int flags) { | |
6f1401dc DM |
2877 | dSP; |
2878 | SV* tmpsv; | |
2879 | SV* const arg = TOPs; | |
2880 | ||
2881 | SvGETMAGIC(arg); | |
2882 | ||
9f8bf298 | 2883 | if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method, |
636ac8fc FC |
2884 | AMGf_noright | AMGf_unary |
2885 | | (flags & AMGf_numarg)))) | |
2886 | { | |
6f1401dc DM |
2887 | if (flags & AMGf_set) { |
2888 | SETs(tmpsv); | |
2889 | } | |
2890 | else { | |
2891 | dTARGET; | |
2892 | if (SvPADMY(TARG)) { | |
2893 | sv_setsv(TARG, tmpsv); | |
2894 | SETTARG; | |
2895 | } | |
2896 | else | |
2897 | SETs(tmpsv); | |
2898 | } | |
2899 | PUTBACK; | |
2900 | return TRUE; | |
2901 | } | |
2902 | ||
2903 | if ((flags & AMGf_numeric) && SvROK(arg)) | |
2904 | *sp = sv_2num(arg); | |
2905 | return FALSE; | |
2906 | } | |
2907 | ||
2908 | ||
2909 | /* Implement tryAMAGICbin_MG macro. | |
2910 | Do get magic, then see if the two stack args are overloaded and if so | |
2911 | call it. | |
2912 | Flags: | |
2913 | AMGf_set return the arg using SETs rather than assigning to | |
2914 | the targ | |
2915 | AMGf_assign op may be called as mutator (eg +=) | |
2916 | AMGf_numeric apply sv_2num to the stack arg. | |
2917 | */ | |
2918 | ||
2919 | bool | |
2920 | Perl_try_amagic_bin(pTHX_ int method, int flags) { | |
6f1401dc DM |
2921 | dSP; |
2922 | SV* const left = TOPm1s; | |
2923 | SV* const right = TOPs; | |
2924 | ||
2925 | SvGETMAGIC(left); | |
2926 | if (left != right) | |
2927 | SvGETMAGIC(right); | |
2928 | ||
2929 | if (SvAMAGIC(left) || SvAMAGIC(right)) { | |
2930 | SV * const tmpsv = amagic_call(left, right, method, | |
636ac8fc FC |
2931 | ((flags & AMGf_assign) && opASSIGN ? AMGf_assign: 0) |
2932 | | (flags & AMGf_numarg)); | |
6f1401dc DM |
2933 | if (tmpsv) { |
2934 | if (flags & AMGf_set) { | |
2935 | (void)POPs; | |
2936 | SETs(tmpsv); | |
2937 | } | |
2938 | else { | |
2939 | dATARGET; | |
2940 | (void)POPs; | |
2941 | if (opASSIGN || SvPADMY(TARG)) { | |
2942 | sv_setsv(TARG, tmpsv); | |
2943 | SETTARG; | |
2944 | } | |
2945 | else | |
2946 | SETs(tmpsv); | |
2947 | } | |
2948 | PUTBACK; | |
2949 | return TRUE; | |
2950 | } | |
2951 | } | |
75ea7a12 FC |
2952 | if(left==right && SvGMAGICAL(left)) { |
2953 | SV * const left = sv_newmortal(); | |
2954 | *(sp-1) = left; | |
2955 | /* Print the uninitialized warning now, so it includes the vari- | |
2956 | able name. */ | |
2957 | if (!SvOK(right)) { | |
2958 | if (ckWARN(WARN_UNINITIALIZED)) report_uninit(right); | |
2959 | sv_setsv_flags(left, &PL_sv_no, 0); | |
2960 | } | |
2961 | else sv_setsv_flags(left, right, 0); | |
2962 | SvGETMAGIC(right); | |
2963 | } | |
6f1401dc | 2964 | if (flags & AMGf_numeric) { |
75ea7a12 FC |
2965 | if (SvROK(TOPm1s)) |
2966 | *(sp-1) = sv_2num(TOPm1s); | |
6f1401dc DM |
2967 | if (SvROK(right)) |
2968 | *sp = sv_2num(right); | |
2969 | } | |
2970 | return FALSE; | |
2971 | } | |
2972 | ||
25a9ffce NC |
2973 | SV * |
2974 | Perl_amagic_deref_call(pTHX_ SV *ref, int method) { | |
2975 | SV *tmpsv = NULL; | |
3d147ac2 | 2976 | HV *stash; |
25a9ffce NC |
2977 | |
2978 | PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL; | |
2979 | ||
3d147ac2 DM |
2980 | if (!SvAMAGIC(ref)) |
2981 | return ref; | |
2982 | /* return quickly if none of the deref ops are overloaded */ | |
2983 | stash = SvSTASH(SvRV(ref)); | |
2984 | assert(SvOOK(stash)); | |
2985 | if (HvAUX(stash)->xhv_aux_flags & HvAUXf_NO_DEREF) | |
2986 | return ref; | |
2987 | ||
2988 | while ((tmpsv = amagic_call(ref, &PL_sv_undef, method, | |
25a9ffce NC |
2989 | AMGf_noright | AMGf_unary))) { |
2990 | if (!SvROK(tmpsv)) | |
2991 | Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); | |
2992 | if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) { | |
2993 | /* Bail out if it returns us the same reference. */ | |
2994 | return tmpsv; | |
2995 | } | |
2996 | ref = tmpsv; | |
3d147ac2 DM |
2997 | if (!SvAMAGIC(ref)) |
2998 | break; | |
25a9ffce NC |
2999 | } |
3000 | return tmpsv ? tmpsv : ref; | |
3001 | } | |
6f1401dc | 3002 | |
8d569291 FC |
3003 | bool |
3004 | Perl_amagic_is_enabled(pTHX_ int method) | |
3005 | { | |
3006 | SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0); | |
3007 | ||
3008 | assert(PL_curcop->cop_hints & HINT_NO_AMAGIC); | |
3009 | ||
3010 | if ( !lex_mask || !SvOK(lex_mask) ) | |
3011 | /* overloading lexically disabled */ | |
3012 | return FALSE; | |
3013 | else if ( lex_mask && SvPOK(lex_mask) ) { | |
3014 | /* we have an entry in the hints hash, check if method has been | |
3015 | * masked by overloading.pm */ | |
3016 | STRLEN len; | |
3017 | const int offset = method / 8; | |
3018 | const int bit = method % 8; | |
3019 | char *pv = SvPV(lex_mask, len); | |
3020 | ||
3021 | /* Bit set, so this overloading operator is disabled */ | |
3022 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) | |
3023 | return FALSE; | |
3024 | } | |
3025 | return TRUE; | |
3026 | } | |
3027 | ||
a0d0e21e | 3028 | SV* |
864dbfa3 | 3029 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 3030 | { |
27da23d5 | 3031 | dVAR; |
b267980d | 3032 | MAGIC *mg; |
9c5ffd7c | 3033 | CV *cv=NULL; |
a0d0e21e | 3034 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 3035 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
3036 | int off = 0, off1, lr = 0, notfound = 0; |
3037 | int postpr = 0, force_cpy = 0; | |
3038 | int assign = AMGf_assign & flags; | |
3039 | const int assignshift = assign ? 1 : 0; | |
bf5522a1 | 3040 | int use_default_op = 0; |
67288365 | 3041 | int force_scalar = 0; |
497b47a8 JH |
3042 | #ifdef DEBUGGING |
3043 | int fl=0; | |
497b47a8 | 3044 | #endif |
25716404 | 3045 | HV* stash=NULL; |
7918f24d NC |
3046 | |
3047 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
3048 | ||
e46c382e | 3049 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
8d569291 | 3050 | if (!amagic_is_enabled(method)) return NULL; |
e46c382e YK |
3051 | } |
3052 | ||
a0d0e21e | 3053 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
0a2c84ab | 3054 | && (stash = SvSTASH(SvRV(left))) && Gv_AMG(stash) |
ad64d0ec | 3055 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 3056 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 3057 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 3058 | : NULL)) |
b267980d | 3059 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
3060 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
3061 | * usual method */ | |
497b47a8 JH |
3062 | ( |
3063 | #ifdef DEBUGGING | |
3064 | fl = 1, | |
a0288114 | 3065 | #endif |
497b47a8 | 3066 | cv = cvp[off=method])))) { |
a0d0e21e LW |
3067 | lr = -1; /* Call method for left argument */ |
3068 | } else { | |
3069 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
3070 | int logic; | |
3071 | ||
3072 | /* look for substituted methods */ | |
ee239bfe | 3073 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
3074 | switch (method) { |
3075 | case inc_amg: | |
ee239bfe IZ |
3076 | force_cpy = 1; |
3077 | if ((cv = cvp[off=add_ass_amg]) | |
3078 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 3079 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
3080 | } |
3081 | break; | |
3082 | case dec_amg: | |
ee239bfe IZ |
3083 | force_cpy = 1; |
3084 | if ((cv = cvp[off = subtr_ass_amg]) | |
3085 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 3086 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
3087 | } |
3088 | break; | |
3089 | case bool__amg: | |
3090 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
3091 | break; | |
3092 | case numer_amg: | |
3093 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
3094 | break; | |
3095 | case string_amg: | |
3096 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
3097 | break; | |
b7787f18 AL |
3098 | case not_amg: |
3099 | (void)((cv = cvp[off=bool__amg]) | |
3100 | || (cv = cvp[off=numer_amg]) | |
3101 | || (cv = cvp[off=string_amg])); | |
2ab54efd MB |
3102 | if (cv) |
3103 | postpr = 1; | |
b7787f18 | 3104 | break; |
748a9306 LW |
3105 | case copy_amg: |
3106 | { | |
76e3520e GS |
3107 | /* |
3108 | * SV* ref causes confusion with the interpreter variable of | |
3109 | * the same name | |
3110 | */ | |
890ce7af | 3111 | SV* const tmpRef=SvRV(left); |
76e3520e | 3112 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 3113 | /* |
3114 | * Just to be extra cautious. Maybe in some | |
3115 | * additional cases sv_setsv is safe, too. | |
3116 | */ | |
890ce7af | 3117 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 3118 | SvOBJECT_on(newref); |
a1cd65be FC |
3119 | /* No need to do SvAMAGIC_on here, as SvAMAGIC macros |
3120 | delegate to the stash. */ | |
85fbaab2 | 3121 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); |
748a9306 LW |
3122 | return newref; |
3123 | } | |
3124 | } | |
3125 | break; | |
a0d0e21e | 3126 | case abs_amg: |
b267980d | 3127 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 3128 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
890ce7af | 3129 | SV* const nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 3130 | if (off1==lt_amg) { |
890ce7af | 3131 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
3132 | lt_amg,AMGf_noright); |
3133 | logic = SvTRUE(lessp); | |
3134 | } else { | |
890ce7af | 3135 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
3136 | ncmp_amg,AMGf_noright); |
3137 | logic = (SvNV(lessp) < 0); | |
3138 | } | |
3139 | if (logic) { | |
3140 | if (off==subtr_amg) { | |
3141 | right = left; | |
748a9306 | 3142 | left = nullsv; |
a0d0e21e LW |
3143 | lr = 1; |
3144 | } | |
3145 | } else { | |
3146 | return left; | |
3147 | } | |
3148 | } | |
3149 | break; | |
3150 | case neg_amg: | |
155aba94 | 3151 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e LW |
3152 | right = left; |
3153 | left = sv_2mortal(newSViv(0)); | |
3154 | lr = 1; | |
3155 | } | |
3156 | break; | |
f216259d | 3157 | case int_amg: |
f5284f61 | 3158 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
c4c7412c | 3159 | case ftest_amg: /* XXXX Eventually should do to_gv. */ |
d4b87e75 | 3160 | case regexp_amg: |
b267980d NIS |
3161 | /* FAIL safe */ |
3162 | return NULL; /* Delegate operation to standard mechanisms. */ | |
81d52ecd | 3163 | |
f5284f61 IZ |
3164 | case to_sv_amg: |
3165 | case to_av_amg: | |
3166 | case to_hv_amg: | |
3167 | case to_gv_amg: | |
3168 | case to_cv_amg: | |
3169 | /* FAIL safe */ | |
b267980d | 3170 | return left; /* Delegate operation to standard mechanisms. */ |
81d52ecd | 3171 | |
a0d0e21e LW |
3172 | default: |
3173 | goto not_found; | |
3174 | } | |
3175 | if (!cv) goto not_found; | |
3176 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
0a2c84ab | 3177 | && (stash = SvSTASH(SvRV(right))) && Gv_AMG(stash) |
ad64d0ec | 3178 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 3179 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 3180 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 3181 | : NULL)) |
69815d08 RS |
3182 | && (cv = cvp[off=method])) { /* Method for right |
3183 | * argument found */ | |
3184 | lr=1; | |
bf5522a1 MB |
3185 | } else if (((cvp && amtp->fallback > AMGfallNEVER) |
3186 | || (ocvp && oamtp->fallback > AMGfallNEVER)) | |
a0d0e21e LW |
3187 | && !(flags & AMGf_unary)) { |
3188 | /* We look for substitution for | |
3189 | * comparison operations and | |
fc36a67e | 3190 | * concatenation */ |
a0d0e21e LW |
3191 | if (method==concat_amg || method==concat_ass_amg |
3192 | || method==repeat_amg || method==repeat_ass_amg) { | |
3193 | return NULL; /* Delegate operation to string conversion */ | |
3194 | } | |
3195 | off = -1; | |
3196 | switch (method) { | |
3197 | case lt_amg: | |
3198 | case le_amg: | |
3199 | case gt_amg: | |
3200 | case ge_amg: | |
3201 | case eq_amg: | |
3202 | case ne_amg: | |
2ab54efd MB |
3203 | off = ncmp_amg; |
3204 | break; | |
a0d0e21e LW |
3205 | case slt_amg: |
3206 | case sle_amg: | |
3207 | case sgt_amg: | |
3208 | case sge_amg: | |
3209 | case seq_amg: | |
3210 | case sne_amg: | |
2ab54efd MB |
3211 | off = scmp_amg; |
3212 | break; | |
a0d0e21e | 3213 | } |
bf5522a1 MB |
3214 | if (off != -1) { |
3215 | if (ocvp && (oamtp->fallback > AMGfallNEVER)) { | |
3216 | cv = ocvp[off]; | |
3217 | lr = -1; | |
3218 | } | |
3219 | if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) { | |
3220 | cv = cvp[off]; | |
3221 | lr = 1; | |
3222 | } | |
3223 | } | |
3224 | if (cv) | |
2ab54efd MB |
3225 | postpr = 1; |
3226 | else | |
3227 | goto not_found; | |
a0d0e21e | 3228 | } else { |
a6006777 | 3229 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
3230 | switch (method) { |
3231 | case to_sv_amg: | |
3232 | case to_av_amg: | |
3233 | case to_hv_amg: | |
3234 | case to_gv_amg: | |
3235 | case to_cv_amg: | |
3236 | /* FAIL safe */ | |
3237 | return left; /* Delegate operation to standard mechanisms. */ | |
b267980d | 3238 | } |
a0d0e21e LW |
3239 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
3240 | notfound = 1; lr = -1; | |
3241 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
3242 | notfound = 1; lr = 1; | |
bf5522a1 MB |
3243 | } else if ((use_default_op = |
3244 | (!ocvp || oamtp->fallback >= AMGfallYES) | |
3245 | && (!cvp || amtp->fallback >= AMGfallYES)) | |
3246 | && !DEBUG_o_TEST) { | |
4cc0ca18 NC |
3247 | /* Skip generating the "no method found" message. */ |
3248 | return NULL; | |
a0d0e21e | 3249 | } else { |
46fc3d4c | 3250 | SV *msg; |
774d564b | 3251 | if (off==-1) off=method; |
b267980d | 3252 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
d66cca07 BF |
3253 | "Operation \"%s\": no method found,%sargument %s%"SVf"%s%"SVf, |
3254 | AMG_id2name(method + assignshift), | |
3255 | (flags & AMGf_unary ? " " : "\n\tleft "), | |
3256 | SvAMAGIC(left)? | |
3257 | "in overloaded package ": | |
3258 | "has no overloaded magic", | |
3259 | SvAMAGIC(left)? | |
3260 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(left)))))): | |
3261 | SVfARG(&PL_sv_no), | |
3262 | SvAMAGIC(right)? | |
3263 | ",\n\tright argument in overloaded package ": | |
3264 | (flags & AMGf_unary | |
3265 | ? "" | |
3266 | : ",\n\tright argument has no overloaded magic"), | |
3267 | SvAMAGIC(right)? | |
3268 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(right)))))): | |
3269 | SVfARG(&PL_sv_no))); | |
bf5522a1 | 3270 | if (use_default_op) { |
d66cca07 | 3271 | DEBUG_o( Perl_deb(aTHX_ "%"SVf, SVfARG(msg)) ); |
a0d0e21e | 3272 | } else { |
be2597df | 3273 | Perl_croak(aTHX_ "%"SVf, SVfARG(msg)); |
a0d0e21e LW |
3274 | } |
3275 | return NULL; | |
3276 | } | |
ee239bfe | 3277 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
3278 | } |
3279 | } | |
67288365 JL |
3280 | |
3281 | switch (method) { | |
3282 | /* in these cases, we're calling '+' or '-' as a fallback for a ++ or -- | |
3283 | * operation. we need this to return a value, so that it can be assigned | |
3284 | * later on, in the postpr block (case inc_amg/dec_amg), even if the | |
3285 | * increment or decrement was itself called in void context */ | |
3286 | case inc_amg: | |
3287 | if (off == add_amg) | |
3288 | force_scalar = 1; | |
3289 | break; | |
3290 | case dec_amg: | |
3291 | if (off == subtr_amg) | |
3292 | force_scalar = 1; | |
3293 | break; | |
3294 | /* in these cases, we're calling an assignment variant of an operator | |
3295 | * (+= rather than +, for instance). regardless of whether it's a | |
3296 | * fallback or not, it always has to return a value, which will be | |
3297 | * assigned to the proper variable later */ | |
3298 | case add_amg: | |
3299 | case subtr_amg: | |
3300 | case mult_amg: | |
3301 | case div_amg: | |
3302 | case modulo_amg: | |
3303 | case pow_amg: | |
3304 | case lshift_amg: | |
3305 | case rshift_amg: | |
3306 | case repeat_amg: | |
3307 | case concat_amg: | |
3308 | case band_amg: | |
3309 | case bor_amg: | |
3310 | case bxor_amg: | |
6d06ecce FC |
3311 | case sband_amg: |
3312 | case sbor_amg: | |
3313 | case sbxor_amg: | |
67288365 JL |
3314 | if (assign) |
3315 | force_scalar = 1; | |
3316 | break; | |
3317 | /* the copy constructor always needs to return a value */ | |
3318 | case copy_amg: | |
3319 | force_scalar = 1; | |
3320 | break; | |
3321 | /* because of the way these are implemented (they don't perform the | |
3322 | * dereferencing themselves, they return a reference that perl then | |
3323 | * dereferences later), they always have to be in scalar context */ | |
3324 | case to_sv_amg: | |
3325 | case to_av_amg: | |
3326 | case to_hv_amg: | |
3327 | case to_gv_amg: | |
3328 | case to_cv_amg: | |
3329 | force_scalar = 1; | |
3330 | break; | |
3331 | /* these don't have an op of their own; they're triggered by their parent | |
3332 | * op, so the context there isn't meaningful ('$a and foo()' in void | |
3333 | * context still needs to pass scalar context on to $a's bool overload) */ | |
3334 | case bool__amg: | |
3335 | case numer_amg: | |
3336 | case string_amg: | |
3337 | force_scalar = 1; | |
3338 | break; | |
3339 | } | |
3340 | ||
497b47a8 | 3341 | #ifdef DEBUGGING |
a0d0e21e | 3342 | if (!notfound) { |
497b47a8 | 3343 | DEBUG_o(Perl_deb(aTHX_ |
d66cca07 | 3344 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %"SVf"%s\n", |
497b47a8 JH |
3345 | AMG_id2name(off), |
3346 | method+assignshift==off? "" : | |
a0288114 | 3347 | " (initially \"", |
497b47a8 JH |
3348 | method+assignshift==off? "" : |
3349 | AMG_id2name(method+assignshift), | |
a0288114 | 3350 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
3351 | flags & AMGf_unary? "" : |
3352 | lr==1 ? " for right argument": " for left argument", | |
3353 | flags & AMGf_unary? " for argument" : "", | |
d66cca07 | 3354 | stash ? SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(stash)))) : SVfARG(newSVpvs_flags("null", SVs_TEMP)), |
497b47a8 | 3355 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 3356 | } |
497b47a8 | 3357 | #endif |
748a9306 LW |
3358 | /* Since we use shallow copy during assignment, we need |
3359 | * to dublicate the contents, probably calling user-supplied | |
3360 | * version of copy operator | |
3361 | */ | |
ee239bfe IZ |
3362 | /* We need to copy in following cases: |
3363 | * a) Assignment form was called. | |
3364 | * assignshift==1, assign==T, method + 1 == off | |
3365 | * b) Increment or decrement, called directly. | |
3366 | * assignshift==0, assign==0, method + 0 == off | |
3367 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 3368 | * assignshift==0, assign==T, |
ee239bfe IZ |
3369 | * force_cpy == T |
3370 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 3371 | * assignshift==0, assign==0, |
ee239bfe IZ |
3372 | * force_cpy == T |
3373 | * e) Assignment form translated to nomethod. | |
3374 | * assignshift==1, assign==T, method + 1 != off | |
3375 | * force_cpy == T | |
3376 | */ | |
3377 | /* off is method, method+assignshift, or a result of opcode substitution. | |
3378 | * In the latter case assignshift==0, so only notfound case is important. | |
3379 | */ | |
73512201 | 3380 | if ( (lr == -1) && ( ( (method + assignshift == off) |
ee239bfe | 3381 | && (assign || (method == inc_amg) || (method == dec_amg))) |
73512201 | 3382 | || force_cpy) ) |
6f1401dc | 3383 | { |
1b38c28e NC |
3384 | /* newSVsv does not behave as advertised, so we copy missing |
3385 | * information by hand */ | |
3386 | SV *tmpRef = SvRV(left); | |
3387 | SV *rv_copy; | |
31d632c3 | 3388 | if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) { |
1b38c28e NC |
3389 | SvRV_set(left, rv_copy); |
3390 | SvSETMAGIC(left); | |
e7881358 | 3391 | SvREFCNT_dec_NN(tmpRef); |
1b38c28e | 3392 | } |
6f1401dc DM |
3393 | } |
3394 | ||
a0d0e21e LW |
3395 | { |
3396 | dSP; | |
3397 | BINOP myop; | |
3398 | SV* res; | |
b7787f18 | 3399 | const bool oldcatch = CATCH_GET; |
67288365 | 3400 | I32 oldmark, nret; |
1c23e2bd | 3401 | U8 gimme = force_scalar ? G_SCALAR : GIMME_V; |
a0d0e21e | 3402 | |
54310121 | 3403 | CATCH_SET(TRUE); |
a0d0e21e LW |
3404 | Zero(&myop, 1, BINOP); |
3405 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 3406 | myop.op_next = NULL; |
67288365 JL |
3407 | myop.op_flags = OPf_STACKED; |
3408 | ||
3409 | switch (gimme) { | |
3410 | case G_VOID: | |
3411 | myop.op_flags |= OPf_WANT_VOID; | |
3412 | break; | |
3413 | case G_ARRAY: | |
3414 | if (flags & AMGf_want_list) { | |
3415 | myop.op_flags |= OPf_WANT_LIST; | |
3416 | break; | |
3417 | } | |
3418 | /* FALLTHROUGH */ | |
3419 | default: | |
3420 | myop.op_flags |= OPf_WANT_SCALAR; | |
3421 | break; | |
3422 | } | |
a0d0e21e | 3423 | |
e788e7d3 | 3424 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 3425 | ENTER; |
462e5cf6 | 3426 | SAVEOP(); |
533c011a | 3427 | PL_op = (OP *) &myop; |
3280af22 | 3428 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 3429 | PL_op->op_private |= OPpENTERSUB_DB; |
897d3989 | 3430 | Perl_pp_pushmark(aTHX); |
a0d0e21e | 3431 | |
924508f0 | 3432 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
3433 | PUSHs(lr>0? right: left); |
3434 | PUSHs(lr>0? left: right); | |
3280af22 | 3435 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 3436 | if (notfound) { |
59cd0e26 NC |
3437 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
3438 | AMG_id2namelen(method + assignshift), SVs_TEMP)); | |
a0d0e21e | 3439 | } |
636ac8fc FC |
3440 | else if (flags & AMGf_numarg) |
3441 | PUSHs(&PL_sv_undef); | |
3442 | if (flags & AMGf_numarg) | |
3443 | PUSHs(&PL_sv_yes); | |
ad64d0ec | 3444 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e | 3445 | PUTBACK; |
67288365 | 3446 | oldmark = TOPMARK; |
a0d0e21e | 3447 | |
139d0ce6 | 3448 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 | 3449 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
3450 | LEAVE; |
3451 | SPAGAIN; | |
67288365 JL |
3452 | nret = SP - (PL_stack_base + oldmark); |
3453 | ||
3454 | switch (gimme) { | |
3455 | case G_VOID: | |
3456 | /* returning NULL has another meaning, and we check the context | |
3457 | * at the call site too, so this can be differentiated from the | |
3458 | * scalar case */ | |
3459 | res = &PL_sv_undef; | |
3460 | SP = PL_stack_base + oldmark; | |
3461 | break; | |
3462 | case G_ARRAY: { | |
3463 | if (flags & AMGf_want_list) { | |
3464 | res = sv_2mortal((SV *)newAV()); | |
3465 | av_extend((AV *)res, nret); | |
3466 | while (nret--) | |
3467 | av_store((AV *)res, nret, POPs); | |
3468 | break; | |
3469 | } | |
3470 | /* FALLTHROUGH */ | |
3471 | } | |
3472 | default: | |
3473 | res = POPs; | |
3474 | break; | |
3475 | } | |
a0d0e21e | 3476 | |
ebafeae7 | 3477 | PUTBACK; |
d3acc0f7 | 3478 | POPSTACK; |
54310121 | 3479 | CATCH_SET(oldcatch); |
a0d0e21e | 3480 | |
a0d0e21e | 3481 | if (postpr) { |
b7787f18 | 3482 | int ans; |
a0d0e21e LW |
3483 | switch (method) { |
3484 | case le_amg: | |
3485 | case sle_amg: | |
3486 | ans=SvIV(res)<=0; break; | |
3487 | case lt_amg: | |
3488 | case slt_amg: | |
3489 | ans=SvIV(res)<0; break; | |
3490 | case ge_amg: | |
3491 | case sge_amg: | |
3492 | ans=SvIV(res)>=0; break; | |
3493 | case gt_amg: | |
3494 | case sgt_amg: | |
3495 | ans=SvIV(res)>0; break; | |
3496 | case eq_amg: | |
3497 | case seq_amg: | |
3498 | ans=SvIV(res)==0; break; | |
3499 | case ne_amg: | |
3500 | case sne_amg: | |
3501 | ans=SvIV(res)!=0; break; | |
3502 | case inc_amg: | |
3503 | case dec_amg: | |
bbce6d69 | 3504 | SvSetSV(left,res); return left; |
dc437b57 | 3505 | case not_amg: |
fe7ac86a | 3506 | ans=!SvTRUE(res); break; |
b7787f18 AL |
3507 | default: |
3508 | ans=0; break; | |
a0d0e21e | 3509 | } |
54310121 | 3510 | return boolSV(ans); |
748a9306 LW |
3511 | } else if (method==copy_amg) { |
3512 | if (!SvROK(res)) { | |
cea2e8a9 | 3513 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
3514 | } |
3515 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
3516 | } else { |
3517 | return res; | |
3518 | } | |
3519 | } | |
3520 | } | |
c9d5ac95 | 3521 | |
f5c1e807 NC |
3522 | void |
3523 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
3524 | { | |
3525 | dVAR; | |
acda4c6a | 3526 | U32 hash; |
f5c1e807 | 3527 | |
7918f24d | 3528 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 | 3529 | |
acda4c6a NC |
3530 | if (len > I32_MAX) |
3531 | Perl_croak(aTHX_ "panic: gv name too long (%"UVuf")", (UV) len); | |
3532 | ||
ae8cc45f NC |
3533 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
3534 | unshare_hek(GvNAME_HEK(gv)); | |
3535 | } | |
3536 | ||
acda4c6a | 3537 | PERL_HASH(hash, name, len); |
c60dbbc3 | 3538 | GvNAME_HEK(gv) = share_hek(name, (flags & SVf_UTF8 ? -(I32)len : (I32)len), hash); |
f5c1e807 NC |
3539 | } |
3540 | ||
66610fdd | 3541 | /* |
f7461760 Z |
3542 | =for apidoc gv_try_downgrade |
3543 | ||
2867cdbc Z |
3544 | If the typeglob C<gv> can be expressed more succinctly, by having |
3545 | something other than a real GV in its place in the stash, replace it | |
3546 | with the optimised form. Basic requirements for this are that C<gv> | |
3547 | is a real typeglob, is sufficiently ordinary, and is only referenced | |
3548 | from its package. This function is meant to be used when a GV has been | |
3549 | looked up in part to see what was there, causing upgrading, but based | |
3550 | on what was found it turns out that the real GV isn't required after all. | |
3551 | ||
3552 | If C<gv> is a completely empty typeglob, it is deleted from the stash. | |
3553 | ||
3554 | If C<gv> is a typeglob containing only a sufficiently-ordinary constant | |
3555 | sub, the typeglob is replaced with a scalar-reference placeholder that | |
3556 | more compactly represents the same thing. | |
f7461760 Z |
3557 | |
3558 | =cut | |
3559 | */ | |
3560 | ||
3561 | void | |
3562 | Perl_gv_try_downgrade(pTHX_ GV *gv) | |
3563 | { | |
3564 | HV *stash; | |
3565 | CV *cv; | |
3566 | HEK *namehek; | |
3567 | SV **gvp; | |
3568 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; | |
95f56751 FC |
3569 | |
3570 | /* XXX Why and where does this leave dangling pointers during global | |
3571 | destruction? */ | |
627364f1 | 3572 | if (PL_phase == PERL_PHASE_DESTRUCT) return; |
95f56751 | 3573 | |
2867cdbc | 3574 | if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
803f2748 | 3575 | !SvOBJECT(gv) && !SvREADONLY(gv) && |
f7461760 | 3576 | isGV_with_GP(gv) && GvGP(gv) && |
2867cdbc | 3577 | !GvINTRO(gv) && GvREFCNT(gv) == 1 && |
f7461760 | 3578 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && |
099be4f1 | 3579 | GvEGVx(gv) == gv && (stash = GvSTASH(gv)))) |
2867cdbc | 3580 | return; |
2be08ad1 FC |
3581 | if (gv == PL_statgv || gv == PL_last_in_gv || gv == PL_stderrgv) |
3582 | return; | |
803f2748 DM |
3583 | if (SvMAGICAL(gv)) { |
3584 | MAGIC *mg; | |
3585 | /* only backref magic is allowed */ | |
3586 | if (SvGMAGICAL(gv) || SvSMAGICAL(gv)) | |
3587 | return; | |
3588 | for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) { | |
3589 | if (mg->mg_type != PERL_MAGIC_backref) | |
3590 | return; | |
3591 | } | |
3592 | } | |
2867cdbc Z |
3593 | cv = GvCV(gv); |
3594 | if (!cv) { | |
3595 | HEK *gvnhek = GvNAME_HEK(gv); | |
0ca9877d | 3596 | (void)hv_deletehek(stash, gvnhek, G_DISCARD); |
8941bf97 | 3597 | } else if (GvMULTI(gv) && cv && SvREFCNT(cv) == 1 && |
f7461760 | 3598 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
34d81fc4 | 3599 | CvSTASH(cv) == stash && !CvNAMED(cv) && CvGV(cv) == gv && |
f7461760 Z |
3600 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && |
3601 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && | |
3602 | (namehek = GvNAME_HEK(gv)) && | |
48c2c411 | 3603 | (gvp = hv_fetchhek(stash, namehek, 0)) && |
f7461760 Z |
3604 | *gvp == (SV*)gv) { |
3605 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); | |
70e5f2b5 | 3606 | const bool imported = !!GvIMPORTED_CV(gv); |
f7461760 Z |
3607 | SvREFCNT(gv) = 0; |
3608 | sv_clear((SV*)gv); | |
3609 | SvREFCNT(gv) = 1; | |
70e5f2b5 | 3610 | SvFLAGS(gv) = SVt_IV|SVf_ROK|SVprv_PCS_IMPORTED * imported; |
dc6369ef EH |
3611 | |
3612 | /* See also: 'SET_SVANY_FOR_BODYLESS_IV' in sv.c */ | |
f7461760 Z |
3613 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - |
3614 | STRUCT_OFFSET(XPVIV, xiv_iv)); | |
3615 | SvRV_set(gv, value); | |
3616 | } | |
3617 | } | |
3618 | ||
9e3fb20c FC |
3619 | GV * |
3620 | Perl_gv_override(pTHX_ const char * const name, const STRLEN len) | |
3621 | { | |
3622 | GV *gv = gv_fetchpvn(name, len, GV_NOTQUAL, SVt_PVCV); | |
3623 | GV * const *gvp; | |
3624 | PERL_ARGS_ASSERT_GV_OVERRIDE; | |
3625 | if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) return gv; | |
3626 | gvp = (GV**)hv_fetch(PL_globalstash, name, len, FALSE); | |
3627 | gv = gvp ? *gvp : NULL; | |
3628 | if (gv && !isGV(gv)) { | |
3629 | if (!SvPCS_IMPORTED(gv)) return NULL; | |
3630 | gv_init(gv, PL_globalstash, name, len, 0); | |
3631 | return gv; | |
3632 | } | |
3633 | return gv && GvCVu(gv) && GvIMPORTED_CV(gv) ? gv : NULL; | |
3634 | } | |
3635 | ||
4aaa4757 FC |
3636 | #include "XSUB.h" |
3637 | ||
3638 | static void | |
3639 | core_xsub(pTHX_ CV* cv) | |
3640 | { | |
3641 | Perl_croak(aTHX_ | |
3642 | "&CORE::%s cannot be called directly", GvNAME(CvGV(cv)) | |
3643 | ); | |
3644 | } | |
3645 | ||
f7461760 | 3646 | /* |
14d04a33 | 3647 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3648 | */ |