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); | |
b59bf0b2 KW |
86 | if (type == SVt_PVAV |
87 | && memEQs(GvNAME(gv), GvNAMELEN(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; |
6881372e FC |
376 | const bool really_sub = |
377 | has_constant && SvTYPE(has_constant) == SVt_PVCV; | |
378 | COP * const old = PL_curcop; | |
756cb477 | 379 | |
e6066781 | 380 | PERL_ARGS_ASSERT_GV_INIT_PVN; |
756cb477 NC |
381 | assert (!(proto && has_constant)); |
382 | ||
383 | if (has_constant) { | |
2eaf799e | 384 | /* The constant has to be a scalar, array or subroutine. */ |
5c1f4d79 | 385 | switch (SvTYPE(has_constant)) { |
5c1f4d79 | 386 | case SVt_PVHV: |
5c1f4d79 NC |
387 | case SVt_PVFM: |
388 | case SVt_PVIO: | |
389 | Perl_croak(aTHX_ "Cannot convert a reference to %s to typeglob", | |
390 | sv_reftype(has_constant, 0)); | |
c9a0dcdc | 391 | NOT_REACHED; /* NOTREACHED */ |
4bbde2f7 | 392 | break; |
81d52ecd | 393 | |
42d0e0b7 | 394 | default: NOOP; |
5c1f4d79 | 395 | } |
756cb477 NC |
396 | SvRV_set(gv, NULL); |
397 | SvROK_off(gv); | |
398 | } | |
463ee0b2 | 399 | |
3b6733bf NC |
400 | |
401 | if (old_type < SVt_PVGV) { | |
402 | if (old_type >= SVt_PV) | |
403 | SvCUR_set(gv, 0); | |
ad64d0ec | 404 | sv_upgrade(MUTABLE_SV(gv), SVt_PVGV); |
3b6733bf | 405 | } |
55d729e4 GS |
406 | if (SvLEN(gv)) { |
407 | if (proto) { | |
f880fe2f | 408 | SvPV_set(gv, NULL); |
b162af07 | 409 | SvLEN_set(gv, 0); |
55d729e4 GS |
410 | SvPOK_off(gv); |
411 | } else | |
94010e71 | 412 | Safefree(SvPVX_mutable(gv)); |
55d729e4 | 413 | } |
2e5b91de NC |
414 | SvIOK_off(gv); |
415 | isGV_with_GP_on(gv); | |
12816592 | 416 | |
6881372e FC |
417 | if (really_sub && !CvISXSUB(has_constant) && CvSTART(has_constant) |
418 | && ( CvSTART(has_constant)->op_type == OP_NEXTSTATE | |
419 | || CvSTART(has_constant)->op_type == OP_DBSTATE)) | |
420 | PL_curcop = (COP *)CvSTART(has_constant); | |
c43ae56f | 421 | GvGP_set(gv, Perl_newGP(aTHX_ gv)); |
6881372e | 422 | PL_curcop = old; |
e15faf7d NC |
423 | GvSTASH(gv) = stash; |
424 | if (stash) | |
ad64d0ec | 425 | Perl_sv_add_backref(aTHX_ MUTABLE_SV(stash), MUTABLE_SV(gv)); |
04f3bf56 | 426 | gv_name_set(gv, name, len, GV_ADD | ( flags & SVf_UTF8 ? SVf_UTF8 : 0 )); |
04ec7e59 FC |
427 | if (flags & GV_ADDMULTI || doproto) /* doproto means it */ |
428 | GvMULTI_on(gv); /* _was_ mentioned */ | |
6881372e | 429 | if (really_sub) { |
2eaf799e FC |
430 | /* Not actually a constant. Just a regular sub. */ |
431 | CV * const cv = (CV *)has_constant; | |
432 | GvCV_set(gv,cv); | |
790acdde | 433 | if (CvNAMED(cv) && CvSTASH(cv) == stash && ( |
2eaf799e FC |
434 | CvNAME_HEK(cv) == GvNAME_HEK(gv) |
435 | || ( HEK_LEN(CvNAME_HEK(cv)) == HEK_LEN(GvNAME_HEK(gv)) | |
436 | && HEK_FLAGS(CvNAME_HEK(cv)) != HEK_FLAGS(GvNAME_HEK(gv)) | |
437 | && HEK_UTF8(CvNAME_HEK(cv)) == HEK_UTF8(GvNAME_HEK(gv)) | |
438 | && memEQ(HEK_KEY(CvNAME_HEK(cv)), GvNAME(gv), GvNAMELEN(gv)) | |
439 | ) | |
440 | )) | |
441 | CvGV_set(cv,gv); | |
442 | } | |
443 | else if (doproto) { | |
e3d2b9e7 | 444 | CV *cv; |
756cb477 NC |
445 | if (has_constant) { |
446 | /* newCONSTSUB takes ownership of the reference from us. */ | |
e38acfd7 | 447 | cv = newCONSTSUB_flags(stash, name, len, flags, has_constant); |
75bd28cf FC |
448 | /* In case op.c:S_process_special_blocks stole it: */ |
449 | if (!GvCV(gv)) | |
c43ae56f | 450 | GvCV_set(gv, (CV *)SvREFCNT_inc_simple_NN(cv)); |
439cdf38 | 451 | assert(GvCV(gv) == cv); /* newCONSTSUB should have set this */ |
1ccdb730 NC |
452 | /* If this reference was a copy of another, then the subroutine |
453 | must have been "imported", by a Perl space assignment to a GV | |
454 | from a reference to CV. */ | |
455 | if (exported_constant) | |
456 | GvIMPORTED_CV_on(gv); | |
186a5ba8 | 457 | CvSTASH_set(cv, PL_curstash); /* XXX Why is this needed? */ |
756cb477 | 458 | } else { |
186a5ba8 | 459 | cv = newSTUB(gv,1); |
756cb477 | 460 | } |
55d729e4 | 461 | if (proto) { |
e3d2b9e7 | 462 | sv_usepvn_flags(MUTABLE_SV(cv), proto, protolen, |
49a54bbe | 463 | SV_HAS_TRAILING_NUL); |
e0260a5b | 464 | if ( proto_utf8 ) SvUTF8_on(MUTABLE_SV(cv)); |
55d729e4 GS |
465 | } |
466 | } | |
463ee0b2 LW |
467 | } |
468 | ||
76e3520e | 469 | STATIC void |
e6066781 | 470 | S_gv_init_svtype(pTHX_ GV *gv, const svtype sv_type) |
a0d0e21e | 471 | { |
13c59d41 MH |
472 | PERL_ARGS_ASSERT_GV_INIT_SVTYPE; |
473 | ||
474 | switch (sv_type) { | |
475 | case SVt_PVIO: | |
476 | (void)GvIOn(gv); | |
477 | break; | |
478 | case SVt_PVAV: | |
479 | (void)GvAVn(gv); | |
480 | break; | |
481 | case SVt_PVHV: | |
482 | (void)GvHVn(gv); | |
483 | break; | |
c69033f2 | 484 | #ifdef PERL_DONT_CREATE_GVSV |
13c59d41 MH |
485 | case SVt_NULL: |
486 | case SVt_PVCV: | |
487 | case SVt_PVFM: | |
488 | case SVt_PVGV: | |
489 | break; | |
490 | default: | |
491 | if(GvSVn(gv)) { | |
492 | /* Work round what appears to be a bug in Sun C++ 5.8 2005/10/13 | |
493 | If we just cast GvSVn(gv) to void, it ignores evaluating it for | |
494 | its side effect */ | |
495 | } | |
c69033f2 | 496 | #endif |
a0d0e21e LW |
497 | } |
498 | } | |
499 | ||
0f8d4b5e FC |
500 | static void core_xsub(pTHX_ CV* cv); |
501 | ||
502 | static GV * | |
503 | S_maybe_add_coresub(pTHX_ HV * const stash, GV *gv, | |
87566176 | 504 | const char * const name, const STRLEN len) |
0f8d4b5e FC |
505 | { |
506 | const int code = keyword(name, len, 1); | |
507 | static const char file[] = __FILE__; | |
97021f77 | 508 | CV *cv, *oldcompcv = NULL; |
0f8d4b5e | 509 | int opnum = 0; |
0f8d4b5e | 510 | bool ampable = TRUE; /* &{}-able */ |
97021f77 FC |
511 | COP *oldcurcop = NULL; |
512 | yy_parser *oldparser = NULL; | |
513 | I32 oldsavestack_ix = 0; | |
0f8d4b5e FC |
514 | |
515 | assert(gv || stash); | |
516 | assert(name); | |
0f8d4b5e | 517 | |
88b892d8 FC |
518 | if (!code) return NULL; /* Not a keyword */ |
519 | switch (code < 0 ? -code : code) { | |
0f8d4b5e | 520 | /* no support for \&CORE::infix; |
d885f758 | 521 | no support for funcs that do not parse like funcs */ |
88b892d8 | 522 | case KEY___DATA__: case KEY___END__: case KEY_and: case KEY_AUTOLOAD: |
a96df643 | 523 | case KEY_BEGIN : case KEY_CHECK : case KEY_cmp: |
7896dde7 | 524 | case KEY_default : case KEY_DESTROY: |
88b892d8 | 525 | case KEY_do : case KEY_dump : case KEY_else : case KEY_elsif : |
d51f8b19 | 526 | case KEY_END : case KEY_eq : case KEY_eval : |
88b892d8 | 527 | case KEY_for : case KEY_foreach: case KEY_format: case KEY_ge : |
498a02d8 | 528 | case KEY_given : case KEY_goto : case KEY_grep : |
88b892d8 FC |
529 | case KEY_gt : case KEY_if: case KEY_INIT: case KEY_last: case KEY_le: |
530 | case KEY_local: case KEY_lt: case KEY_m : case KEY_map : case KEY_my: | |
531 | case KEY_ne : case KEY_next : case KEY_no: case KEY_or: case KEY_our: | |
1efec5ed | 532 | case KEY_package: case KEY_print: case KEY_printf: |
919ad5f7 | 533 | case KEY_q : case KEY_qq : case KEY_qr : case KEY_qw : |
88b892d8 | 534 | case KEY_qx : case KEY_redo : case KEY_require: case KEY_return: |
d33bb3da | 535 | case KEY_s : case KEY_say : case KEY_sort : |
d80ed303 | 536 | case KEY_state: case KEY_sub : |
46bef06f | 537 | case KEY_tr : case KEY_UNITCHECK: case KEY_unless: |
7896dde7 | 538 | case KEY_until: case KEY_use : case KEY_when : case KEY_while : |
88b892d8 | 539 | case KEY_x : case KEY_xor : case KEY_y : |
0f8d4b5e FC |
540 | return NULL; |
541 | case KEY_chdir: | |
eb31eb35 | 542 | case KEY_chomp: case KEY_chop: case KEY_defined: case KEY_delete: |
73665bc4 | 543 | case KEY_eof : case KEY_exec: case KEY_exists : |
0f8d4b5e | 544 | case KEY_lstat: |
bea284c8 | 545 | case KEY_split: |
0f8d4b5e FC |
546 | case KEY_stat: |
547 | case KEY_system: | |
548 | case KEY_truncate: case KEY_unlink: | |
0f8d4b5e FC |
549 | ampable = FALSE; |
550 | } | |
551 | if (!gv) { | |
552 | gv = (GV *)newSV(0); | |
553 | gv_init(gv, stash, name, len, TRUE); | |
554 | } | |
7e68c38b | 555 | GvMULTI_on(gv); |
0f8d4b5e FC |
556 | if (ampable) { |
557 | ENTER; | |
558 | oldcurcop = PL_curcop; | |
559 | oldparser = PL_parser; | |
560 | lex_start(NULL, NULL, 0); | |
561 | oldcompcv = PL_compcv; | |
562 | PL_compcv = NULL; /* Prevent start_subparse from setting | |
563 | CvOUTSIDE. */ | |
564 | oldsavestack_ix = start_subparse(FALSE,0); | |
565 | cv = PL_compcv; | |
566 | } | |
567 | else { | |
568 | /* Avoid calling newXS, as it calls us, and things start to | |
569 | get hairy. */ | |
570 | cv = MUTABLE_CV(newSV_type(SVt_PVCV)); | |
571 | GvCV_set(gv,cv); | |
572 | GvCVGEN(gv) = 0; | |
0f8d4b5e FC |
573 | CvISXSUB_on(cv); |
574 | CvXSUB(cv) = core_xsub; | |
eacbb379 | 575 | PoisonPADLIST(cv); |
0f8d4b5e FC |
576 | } |
577 | CvGV_set(cv, gv); /* This stops new ATTRSUB from setting CvFILE | |
578 | from PL_curcop. */ | |
9b669ea1 DD |
579 | /* XSUBs can't be perl lang/perl5db.pl debugged |
580 | if (PERLDB_LINE_OR_SAVESRC) | |
581 | (void)gv_fetchfile(file); */ | |
0f8d4b5e FC |
582 | CvFILE(cv) = (char *)file; |
583 | /* XXX This is inefficient, as doing things this order causes | |
584 | a prototype check in newATTRSUB. But we have to do | |
585 | it this order as we need an op number before calling | |
586 | new ATTRSUB. */ | |
587 | (void)core_prototype((SV *)cv, name, code, &opnum); | |
87566176 | 588 | if (stash) |
73c02f15 | 589 | (void)hv_store(stash,name,len,(SV *)gv,0); |
0f8d4b5e | 590 | if (ampable) { |
4428fb0e TC |
591 | #ifdef DEBUGGING |
592 | CV *orig_cv = cv; | |
593 | #endif | |
0f8d4b5e | 594 | CvLVALUE_on(cv); |
4428fb0e TC |
595 | /* newATTRSUB will free the CV and return NULL if we're still |
596 | compiling after a syntax error */ | |
e8f91c91 | 597 | if ((cv = newATTRSUB_x( |
7e68c38b | 598 | oldsavestack_ix, (OP *)gv, |
0f8d4b5e FC |
599 | NULL,NULL, |
600 | coresub_op( | |
601 | opnum | |
602 | ? newSVuv((UV)opnum) | |
603 | : newSVpvn(name,len), | |
604 | code, opnum | |
7e68c38b | 605 | ), |
e8f91c91 | 606 | TRUE |
4428fb0e TC |
607 | )) != NULL) { |
608 | assert(GvCV(gv) == orig_cv); | |
609 | if (opnum != OP_VEC && opnum != OP_SUBSTR && opnum != OP_POS | |
cd642408 | 610 | && opnum != OP_UNDEF && opnum != OP_KEYS) |
4428fb0e TC |
611 | CvLVALUE_off(cv); /* Now *that* was a neat trick. */ |
612 | } | |
0f8d4b5e FC |
613 | LEAVE; |
614 | PL_parser = oldparser; | |
615 | PL_curcop = oldcurcop; | |
616 | PL_compcv = oldcompcv; | |
617 | } | |
4428fb0e | 618 | if (cv) { |
a83b92fa Z |
619 | SV *opnumsv = newSViv( |
620 | (opnum == OP_ENTEREVAL && len == 9 && memEQ(name, "evalbytes", 9)) ? | |
621 | (OP_ENTEREVAL | (1<<16)) | |
622 | : opnum ? opnum : (((I32)name[2]) << 16)); | |
623 | cv_set_call_checker_flags(cv, Perl_ck_entersub_args_core, opnumsv, 0); | |
624 | SvREFCNT_dec_NN(opnumsv); | |
4428fb0e TC |
625 | } |
626 | ||
0f8d4b5e FC |
627 | return gv; |
628 | } | |
629 | ||
954c1994 | 630 | /* |
6c53d59b FC |
631 | =for apidoc gv_fetchmeth |
632 | ||
633 | Like L</gv_fetchmeth_pvn>, but lacks a flags parameter. | |
634 | ||
e6919483 BF |
635 | =for apidoc gv_fetchmeth_sv |
636 | ||
637 | Exactly like L</gv_fetchmeth_pvn>, but takes the name string in the form | |
638 | of an SV instead of a string/length pair. | |
639 | ||
640 | =cut | |
641 | */ | |
642 | ||
643 | GV * | |
644 | Perl_gv_fetchmeth_sv(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
645 | { | |
c290e187 | 646 | char *namepv; |
647 | STRLEN namelen; | |
648 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV; | |
649 | if (LIKELY(SvPOK_nog(namesv))) /* common case */ | |
14062320 FC |
650 | return gv_fetchmeth_internal(stash, namesv, NULL, 0, level, |
651 | flags | SvUTF8(namesv)); | |
c290e187 | 652 | namepv = SvPV(namesv, namelen); |
653 | if (SvUTF8(namesv)) flags |= SVf_UTF8; | |
654 | return gv_fetchmeth_pvn(stash, namepv, namelen, level, flags); | |
e6919483 BF |
655 | } |
656 | ||
657 | /* | |
658 | =for apidoc gv_fetchmeth_pv | |
659 | ||
660 | Exactly like L</gv_fetchmeth_pvn>, but takes a nul-terminated string | |
661 | instead of a string/length pair. | |
662 | ||
663 | =cut | |
664 | */ | |
665 | ||
666 | GV * | |
667 | Perl_gv_fetchmeth_pv(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
668 | { | |
669 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV; | |
c6afe666 | 670 | return gv_fetchmeth_internal(stash, NULL, name, strlen(name), level, flags); |
e6919483 BF |
671 | } |
672 | ||
673 | /* | |
674 | =for apidoc gv_fetchmeth_pvn | |
954c1994 GS |
675 | |
676 | Returns the glob with the given C<name> and a defined subroutine or | |
677 | C<NULL>. The glob lives in the given C<stash>, or in the stashes | |
796b6530 | 678 | accessible via C<@ISA> and C<UNIVERSAL::>. |
954c1994 GS |
679 | |
680 | The argument C<level> should be either 0 or -1. If C<level==0>, as a | |
681 | side-effect creates a glob with the given C<name> in the given C<stash> | |
682 | which in the case of success contains an alias for the subroutine, and sets | |
e1a479c5 | 683 | up caching info for this glob. |
954c1994 | 684 | |
796b6530 | 685 | The only significant values for C<flags> are C<GV_SUPER> and C<SVf_UTF8>. |
aae43805 | 686 | |
796b6530 | 687 | C<GV_SUPER> indicates that we want to look up the method in the superclasses |
aae43805 | 688 | of the C<stash>. |
e6919483 | 689 | |
aae43805 | 690 | The |
954c1994 | 691 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
4929bf7b | 692 | visible to Perl code. So when calling C<call_sv>, you should not use |
954c1994 | 693 | the GV directly; instead, you should use the method's CV, which can be |
b267980d | 694 | obtained from the GV with the C<GvCV> macro. |
954c1994 | 695 | |
4f8d487a KW |
696 | =for apidoc Amnh||GV_SUPER |
697 | ||
954c1994 GS |
698 | =cut |
699 | */ | |
700 | ||
e1a479c5 BB |
701 | /* NOTE: No support for tied ISA */ |
702 | ||
c6afe666 | 703 | PERL_STATIC_INLINE GV* |
704 | S_gv_fetchmeth_internal(pTHX_ HV* stash, SV* meth, const char* name, STRLEN len, I32 level, U32 flags) | |
79072805 | 705 | { |
463ee0b2 | 706 | GV** gvp; |
c6afe666 | 707 | HE* he; |
e1a479c5 BB |
708 | AV* linear_av; |
709 | SV** linear_svp; | |
710 | SV* linear_sv; | |
aae43805 | 711 | HV* cstash, *cachestash; |
e1a479c5 BB |
712 | GV* candidate = NULL; |
713 | CV* cand_cv = NULL; | |
e1a479c5 | 714 | GV* topgv = NULL; |
bfcb3514 | 715 | const char *hvname; |
c6afe666 | 716 | I32 create = (level >= 0) ? HV_FETCH_LVALUE : 0; |
e1a479c5 | 717 | I32 items; |
e1a479c5 | 718 | U32 topgen_cmp; |
04f3bf56 | 719 | U32 is_utf8 = flags & SVf_UTF8; |
a0d0e21e | 720 | |
af09ea45 IK |
721 | /* UNIVERSAL methods should be callable without a stash */ |
722 | if (!stash) { | |
e1a479c5 | 723 | create = 0; /* probably appropriate */ |
da51bb9b | 724 | if(!(stash = gv_stashpvs("UNIVERSAL", 0))) |
af09ea45 IK |
725 | return 0; |
726 | } | |
727 | ||
e1a479c5 BB |
728 | assert(stash); |
729 | ||
bfcb3514 NC |
730 | hvname = HvNAME_get(stash); |
731 | if (!hvname) | |
e1a479c5 | 732 | Perl_croak(aTHX_ "Can't use anonymous symbol table for method lookup"); |
e27ad1f2 | 733 | |
e1a479c5 | 734 | assert(hvname); |
55df6700 | 735 | assert(name || meth); |
463ee0b2 | 736 | |
aae43805 | 737 | DEBUG_o( Perl_deb(aTHX_ "Looking for %smethod %s in package %s\n", |
55df6700 FC |
738 | flags & GV_SUPER ? "SUPER " : "", |
739 | name ? name : SvPV_nolen(meth), hvname) ); | |
44a8e56a | 740 | |
dd69841b | 741 | topgen_cmp = HvMROMETA(stash)->cache_gen + PL_sub_generation; |
e1a479c5 | 742 | |
aae43805 | 743 | if (flags & GV_SUPER) { |
1a33a059 FC |
744 | if (!HvAUX(stash)->xhv_mro_meta->super) |
745 | HvAUX(stash)->xhv_mro_meta->super = newHV(); | |
746 | cachestash = HvAUX(stash)->xhv_mro_meta->super; | |
aae43805 FC |
747 | } |
748 | else cachestash = stash; | |
749 | ||
e1a479c5 | 750 | /* check locally for a real method or a cache entry */ |
c6afe666 | 751 | he = (HE*)hv_common( |
1cde3371 | 752 | cachestash, meth, name, len, is_utf8 ? HVhek_UTF8 : 0, create, NULL, 0 |
c6afe666 | 753 | ); |
754 | if (he) gvp = (GV**)&HeVAL(he); | |
755 | else gvp = NULL; | |
756 | ||
e1a479c5 BB |
757 | if(gvp) { |
758 | topgv = *gvp; | |
0f8d4b5e | 759 | have_gv: |
e1a479c5 BB |
760 | assert(topgv); |
761 | if (SvTYPE(topgv) != SVt_PVGV) | |
55df6700 FC |
762 | { |
763 | if (!name) | |
764 | name = SvPV_nomg(meth, len); | |
04ec7e59 | 765 | gv_init_pvn(topgv, stash, name, len, GV_ADDMULTI|is_utf8); |
55df6700 | 766 | } |
e1a479c5 BB |
767 | if ((cand_cv = GvCV(topgv))) { |
768 | /* If genuine method or valid cache entry, use it */ | |
769 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == topgen_cmp) { | |
770 | return topgv; | |
771 | } | |
772 | else { | |
773 | /* stale cache entry, junk it and move on */ | |
e7881358 | 774 | SvREFCNT_dec_NN(cand_cv); |
c43ae56f DM |
775 | GvCV_set(topgv, NULL); |
776 | cand_cv = NULL; | |
e1a479c5 BB |
777 | GvCVGEN(topgv) = 0; |
778 | } | |
779 | } | |
780 | else if (GvCVGEN(topgv) == topgen_cmp) { | |
781 | /* cache indicates no such method definitively */ | |
782 | return 0; | |
783 | } | |
aae43805 | 784 | else if (stash == cachestash |
b59bf0b2 KW |
785 | && len > 1 /* shortest is uc */ |
786 | && memEQs(hvname, HvNAMELEN_get(stash), "CORE") | |
87566176 | 787 | && S_maybe_add_coresub(aTHX_ NULL,topgv,name,len)) |
0f8d4b5e | 788 | goto have_gv; |
463ee0b2 | 789 | } |
79072805 | 790 | |
aae43805 | 791 | linear_av = mro_get_linear_isa(stash); /* has ourselves at the top of the list */ |
e1a479c5 BB |
792 | linear_svp = AvARRAY(linear_av) + 1; /* skip over self */ |
793 | items = AvFILLp(linear_av); /* no +1, to skip over self */ | |
794 | while (items--) { | |
795 | linear_sv = *linear_svp++; | |
796 | assert(linear_sv); | |
797 | cstash = gv_stashsv(linear_sv, 0); | |
798 | ||
dd69841b | 799 | if (!cstash) { |
ecad31f0 | 800 | Perl_ck_warner(aTHX_ packWARN(WARN_SYNTAX), |
147e3846 | 801 | "Can't locate package %" SVf " for @%" HEKf "::ISA", |
ecad31f0 | 802 | SVfARG(linear_sv), |
d0c0e7dd | 803 | HEKfARG(HvNAME_HEK(stash))); |
e1a479c5 BB |
804 | continue; |
805 | } | |
9607fc9c | 806 | |
e1a479c5 BB |
807 | assert(cstash); |
808 | ||
202cd98a SA |
809 | gvp = (GV**)hv_common( |
810 | cstash, meth, name, len, is_utf8 ? HVhek_UTF8 : 0, HV_FETCH_JUST_SV, NULL, 0 | |
811 | ); | |
0f8d4b5e FC |
812 | if (!gvp) { |
813 | if (len > 1 && HvNAMELEN_get(cstash) == 4) { | |
814 | const char *hvname = HvNAME(cstash); assert(hvname); | |
c8b388b0 | 815 | if (strBEGINs(hvname, "CORE") |
0f8d4b5e | 816 | && (candidate = |
87566176 | 817 | S_maybe_add_coresub(aTHX_ cstash,NULL,name,len) |
0f8d4b5e FC |
818 | )) |
819 | goto have_candidate; | |
820 | } | |
821 | continue; | |
822 | } | |
823 | else candidate = *gvp; | |
824 | have_candidate: | |
e1a479c5 | 825 | assert(candidate); |
04f3bf56 | 826 | if (SvTYPE(candidate) != SVt_PVGV) |
04ec7e59 | 827 | gv_init_pvn(candidate, cstash, name, len, GV_ADDMULTI|is_utf8); |
e1a479c5 BB |
828 | if (SvTYPE(candidate) == SVt_PVGV && (cand_cv = GvCV(candidate)) && !GvCVGEN(candidate)) { |
829 | /* | |
830 | * Found real method, cache method in topgv if: | |
831 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
832 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
833 | */ | |
834 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
835 | CV *old_cv = GvCV(topgv); |
836 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 837 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 838 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
839 | GvCVGEN(topgv) = topgen_cmp; |
840 | } | |
841 | return candidate; | |
842 | } | |
843 | } | |
9607fc9c | 844 | |
e1a479c5 BB |
845 | /* Check UNIVERSAL without caching */ |
846 | if(level == 0 || level == -1) { | |
55df6700 FC |
847 | candidate = gv_fetchmeth_internal(NULL, meth, name, len, 1, |
848 | flags &~GV_SUPER); | |
e1a479c5 BB |
849 | if(candidate) { |
850 | cand_cv = GvCV(candidate); | |
851 | if (topgv && (GvREFCNT(topgv) == 1) && (CvROOT(cand_cv) || CvXSUB(cand_cv))) { | |
9bfbb681 VP |
852 | CV *old_cv = GvCV(topgv); |
853 | SvREFCNT_dec(old_cv); | |
e1a479c5 | 854 | SvREFCNT_inc_simple_void_NN(cand_cv); |
c43ae56f | 855 | GvCV_set(topgv, cand_cv); |
e1a479c5 BB |
856 | GvCVGEN(topgv) = topgen_cmp; |
857 | } | |
858 | return candidate; | |
859 | } | |
860 | } | |
861 | ||
862 | if (topgv && GvREFCNT(topgv) == 1) { | |
863 | /* cache the fact that the method is not defined */ | |
864 | GvCVGEN(topgv) = topgen_cmp; | |
a0d0e21e LW |
865 | } |
866 | ||
79072805 LW |
867 | return 0; |
868 | } | |
869 | ||
c6afe666 | 870 | GV * |
871 | Perl_gv_fetchmeth_pvn(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) | |
872 | { | |
873 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN; | |
874 | return gv_fetchmeth_internal(stash, NULL, name, len, level, flags); | |
875 | } | |
876 | ||
954c1994 | 877 | /* |
460e5730 FC |
878 | =for apidoc gv_fetchmeth_autoload |
879 | ||
880 | This is the old form of L</gv_fetchmeth_pvn_autoload>, which has no flags | |
881 | parameter. | |
882 | ||
d21989ed | 883 | =for apidoc gv_fetchmeth_sv_autoload |
611c1e95 | 884 | |
d21989ed BF |
885 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes the name string in the form |
886 | of an SV instead of a string/length pair. | |
887 | ||
888 | =cut | |
889 | */ | |
890 | ||
891 | GV * | |
892 | Perl_gv_fetchmeth_sv_autoload(pTHX_ HV *stash, SV *namesv, I32 level, U32 flags) | |
893 | { | |
894 | char *namepv; | |
895 | STRLEN namelen; | |
896 | PERL_ARGS_ASSERT_GV_FETCHMETH_SV_AUTOLOAD; | |
897 | namepv = SvPV(namesv, namelen); | |
898 | if (SvUTF8(namesv)) | |
899 | flags |= SVf_UTF8; | |
900 | return gv_fetchmeth_pvn_autoload(stash, namepv, namelen, level, flags); | |
901 | } | |
902 | ||
903 | /* | |
904 | =for apidoc gv_fetchmeth_pv_autoload | |
905 | ||
906 | Exactly like L</gv_fetchmeth_pvn_autoload>, but takes a nul-terminated string | |
907 | instead of a string/length pair. | |
908 | ||
909 | =cut | |
910 | */ | |
911 | ||
912 | GV * | |
913 | Perl_gv_fetchmeth_pv_autoload(pTHX_ HV *stash, const char *name, I32 level, U32 flags) | |
914 | { | |
915 | PERL_ARGS_ASSERT_GV_FETCHMETH_PV_AUTOLOAD; | |
916 | return gv_fetchmeth_pvn_autoload(stash, name, strlen(name), level, flags); | |
917 | } | |
918 | ||
919 | /* | |
920 | =for apidoc gv_fetchmeth_pvn_autoload | |
921 | ||
796b6530 | 922 | Same as C<gv_fetchmeth_pvn()>, but looks for autoloaded subroutines too. |
611c1e95 IZ |
923 | Returns a glob for the subroutine. |
924 | ||
925 | For an autoloaded subroutine without a GV, will create a GV even | |
796b6530 | 926 | if C<level < 0>. For an autoloaded subroutine without a stub, C<GvCV()> |
611c1e95 IZ |
927 | of the result may be zero. |
928 | ||
796b6530 | 929 | Currently, the only significant value for C<flags> is C<SVf_UTF8>. |
d21989ed | 930 | |
611c1e95 IZ |
931 | =cut |
932 | */ | |
933 | ||
934 | GV * | |
d21989ed | 935 | Perl_gv_fetchmeth_pvn_autoload(pTHX_ HV *stash, const char *name, STRLEN len, I32 level, U32 flags) |
611c1e95 | 936 | { |
499321d3 | 937 | GV *gv = gv_fetchmeth_pvn(stash, name, len, level, flags); |
611c1e95 | 938 | |
d21989ed | 939 | PERL_ARGS_ASSERT_GV_FETCHMETH_PVN_AUTOLOAD; |
7918f24d | 940 | |
611c1e95 | 941 | if (!gv) { |
611c1e95 IZ |
942 | CV *cv; |
943 | GV **gvp; | |
944 | ||
945 | if (!stash) | |
6136c704 | 946 | return NULL; /* UNIVERSAL::AUTOLOAD could cause trouble */ |
7edbdc6b | 947 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
6136c704 | 948 | return NULL; |
d21989ed | 949 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, flags))) |
6136c704 | 950 | return NULL; |
611c1e95 IZ |
951 | cv = GvCV(gv); |
952 | if (!(CvROOT(cv) || CvXSUB(cv))) | |
6136c704 | 953 | return NULL; |
611c1e95 IZ |
954 | /* Have an autoload */ |
955 | if (level < 0) /* Cannot do without a stub */ | |
d21989ed | 956 | gv_fetchmeth_pvn(stash, name, len, 0, flags); |
c60dbbc3 BF |
957 | gvp = (GV**)hv_fetch(stash, name, |
958 | (flags & SVf_UTF8) ? -(I32)len : (I32)len, (level >= 0)); | |
611c1e95 | 959 | if (!gvp) |
6136c704 | 960 | return NULL; |
611c1e95 IZ |
961 | return *gvp; |
962 | } | |
963 | return gv; | |
964 | } | |
965 | ||
966 | /* | |
954c1994 GS |
967 | =for apidoc gv_fetchmethod_autoload |
968 | ||
969 | Returns the glob which contains the subroutine to call to invoke the method | |
970 | on the C<stash>. In fact in the presence of autoloading this may be the | |
796b6530 | 971 | glob for "AUTOLOAD". In this case the corresponding variable C<$AUTOLOAD> is |
b267980d | 972 | already setup. |
954c1994 GS |
973 | |
974 | The third parameter of C<gv_fetchmethod_autoload> determines whether | |
975 | AUTOLOAD lookup is performed if the given method is not present: non-zero | |
b267980d | 976 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
954c1994 | 977 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
b267980d | 978 | with a non-zero C<autoload> parameter. |
954c1994 | 979 | |
cec2d7b1 FC |
980 | These functions grant C<"SUPER"> token |
981 | as a prefix of the method name. Note | |
954c1994 GS |
982 | that if you want to keep the returned glob for a long time, you need to |
983 | check for it being "AUTOLOAD", since at the later time the call may load a | |
796b6530 | 984 | different subroutine due to C<$AUTOLOAD> changing its value. Use the glob |
cec2d7b1 | 985 | created as a side effect to do this. |
954c1994 | 986 | |
cec2d7b1 FC |
987 | These functions have the same side-effects as C<gv_fetchmeth> with |
988 | C<level==0>. The warning against passing the GV returned by | |
989 | C<gv_fetchmeth> to C<call_sv> applies equally to these functions. | |
954c1994 GS |
990 | |
991 | =cut | |
992 | */ | |
993 | ||
dc848c6f | 994 | GV * |
864dbfa3 | 995 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
dc848c6f | 996 | { |
547bb267 NC |
997 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_AUTOLOAD; |
998 | ||
256d1bb2 NC |
999 | return gv_fetchmethod_flags(stash, name, autoload ? GV_AUTOLOAD : 0); |
1000 | } | |
1001 | ||
44130a26 BF |
1002 | GV * |
1003 | Perl_gv_fetchmethod_sv_flags(pTHX_ HV *stash, SV *namesv, U32 flags) | |
1004 | { | |
1005 | char *namepv; | |
1006 | STRLEN namelen; | |
1007 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_SV_FLAGS; | |
1008 | namepv = SvPV(namesv, namelen); | |
1009 | if (SvUTF8(namesv)) | |
1010 | flags |= SVf_UTF8; | |
1011 | return gv_fetchmethod_pvn_flags(stash, namepv, namelen, flags); | |
1012 | } | |
1013 | ||
1014 | GV * | |
1015 | Perl_gv_fetchmethod_pv_flags(pTHX_ HV *stash, const char *name, U32 flags) | |
1016 | { | |
1017 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PV_FLAGS; | |
1018 | return gv_fetchmethod_pvn_flags(stash, name, strlen(name), flags); | |
1019 | } | |
1020 | ||
256d1bb2 | 1021 | GV * |
44130a26 | 1022 | Perl_gv_fetchmethod_pvn_flags(pTHX_ HV *stash, const char *name, const STRLEN len, U32 flags) |
256d1bb2 | 1023 | { |
65308f87 YO |
1024 | const char * const origname = name; |
1025 | const char * const name_end = name + len; | |
e2cace1e | 1026 | const char *last_separator = NULL; |
a0d0e21e | 1027 | GV* gv; |
0dae17bd | 1028 | HV* ostash = stash; |
ad64d0ec | 1029 | SV *const error_report = MUTABLE_SV(stash); |
256d1bb2 NC |
1030 | const U32 autoload = flags & GV_AUTOLOAD; |
1031 | const U32 do_croak = flags & GV_CROAK; | |
14d1dfbd | 1032 | const U32 is_utf8 = flags & SVf_UTF8; |
0dae17bd | 1033 | |
44130a26 | 1034 | PERL_ARGS_ASSERT_GV_FETCHMETHOD_PVN_FLAGS; |
7918f24d | 1035 | |
eff494dd | 1036 | if (SvTYPE(stash) < SVt_PVHV) |
5c284bb0 | 1037 | stash = NULL; |
c9bf4021 | 1038 | else { |
e2cace1e | 1039 | /* The only way stash can become NULL later on is if last_separator is set, |
c9bf4021 NC |
1040 | which in turn means that there is no need for a SVt_PVHV case |
1041 | the error reporting code. */ | |
1042 | } | |
b267980d | 1043 | |
cfb73676 YO |
1044 | { |
1045 | /* check if the method name is fully qualified or | |
1046 | * not, and separate the package name from the actual | |
1047 | * method name. | |
1048 | * | |
1049 | * leaves last_separator pointing to the beginning of the | |
1050 | * last package separator (either ' or ::) or 0 | |
1051 | * if none was found. | |
1052 | * | |
1053 | * leaves name pointing at the beginning of the | |
1054 | * method name. | |
1055 | */ | |
1056 | const char *name_cursor = name; | |
1057 | const char * const name_em1 = name_end - 1; /* name_end minus 1 */ | |
1058 | for (name_cursor = name; name_cursor < name_end ; name_cursor++) { | |
1059 | if (*name_cursor == '\'') { | |
1060 | last_separator = name_cursor; | |
1061 | name = name_cursor + 1; | |
1062 | } | |
1063 | else if (name_cursor < name_em1 && *name_cursor == ':' && name_cursor[1] == ':') { | |
1064 | last_separator = name_cursor++; | |
1065 | name = name_cursor + 1; | |
1066 | } | |
1067 | } | |
a0d0e21e | 1068 | } |
cfb73676 YO |
1069 | |
1070 | /* did we find a separator? */ | |
e2cace1e | 1071 | if (last_separator) { |
9b7f107c YO |
1072 | STRLEN sep_len= last_separator - origname; |
1073 | if ( memEQs(origname, sep_len, "SUPER")) { | |
9607fc9c | 1074 | /* ->SUPER::method should really be looked up in original stash */ |
aae43805 FC |
1075 | stash = CopSTASH(PL_curcop); |
1076 | flags |= GV_SUPER; | |
cea2e8a9 | 1077 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
0308a534 | 1078 | origname, HvENAME_get(stash), name) ); |
4633a7c4 | 1079 | } |
47324b4e KW |
1080 | else if ( sep_len >= 7 && |
1081 | strBEGINs(last_separator - 7, "::SUPER")) { | |
aae43805 | 1082 | /* don't autovifify if ->NoSuchStash::SUPER::method */ |
9b7f107c | 1083 | stash = gv_stashpvn(origname, sep_len - 7, is_utf8); |
aae43805 FC |
1084 | if (stash) flags |= GV_SUPER; |
1085 | } | |
e189a56d | 1086 | else { |
af09ea45 | 1087 | /* don't autovifify if ->NoSuchStash::method */ |
9b7f107c | 1088 | stash = gv_stashpvn(origname, sep_len, is_utf8); |
e189a56d | 1089 | } |
0dae17bd | 1090 | ostash = stash; |
4633a7c4 LW |
1091 | } |
1092 | ||
65308f87 | 1093 | gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags); |
a0d0e21e | 1094 | if (!gv) { |
7da9d78d AB |
1095 | /* This is the special case that exempts Foo->import and |
1096 | Foo->unimport from being an error even if there's no | |
1097 | import/unimport subroutine */ | |
0740a29d Z |
1098 | if (strEQ(name,"import") || strEQ(name,"unimport")) { |
1099 | gv = (GV*)sv_2mortal((SV*)newCONSTSUB_flags(NULL, | |
1100 | NULL, 0, 0, NULL)); | |
1101 | } else if (autoload) | |
c8416c26 | 1102 | gv = gv_autoload_pvn( |
65308f87 | 1103 | ostash, name, name_end - name, GV_AUTOLOAD_ISMETHOD|flags |
c8416c26 | 1104 | ); |
256d1bb2 NC |
1105 | if (!gv && do_croak) { |
1106 | /* Right now this is exclusively for the benefit of S_method_common | |
1107 | in pp_hot.c */ | |
1108 | if (stash) { | |
15e6cdd9 DG |
1109 | /* If we can't find an IO::File method, it might be a call on |
1110 | * a filehandle. If IO:File has not been loaded, try to | |
1111 | * require it first instead of croaking */ | |
1112 | const char *stash_name = HvNAME_get(stash); | |
31b05a0f FR |
1113 | if (stash_name && memEQs(stash_name, HvNAMELEN_get(stash), "IO::File") |
1114 | && !Perl_hv_common(aTHX_ GvHVn(PL_incgv), NULL, | |
1115 | STR_WITH_LEN("IO/File.pm"), 0, | |
1116 | HV_FETCH_ISEXISTS, NULL, 0) | |
15e6cdd9 | 1117 | ) { |
31b05a0f | 1118 | require_pv("IO/File.pm"); |
65308f87 | 1119 | gv = gv_fetchmeth_pvn(stash, name, name_end - name, 0, flags); |
15e6cdd9 DG |
1120 | if (gv) |
1121 | return gv; | |
1122 | } | |
256d1bb2 | 1123 | Perl_croak(aTHX_ |
147e3846 KW |
1124 | "Can't locate object method \"%" UTF8f |
1125 | "\" via package \"%" HEKf "\"", | |
65308f87 | 1126 | UTF8fARG(is_utf8, name_end - name, name), |
d0c0e7dd | 1127 | HEKfARG(HvNAME_HEK(stash))); |
256d1bb2 NC |
1128 | } |
1129 | else { | |
ecad31f0 | 1130 | SV* packnamesv; |
256d1bb2 | 1131 | |
e2cace1e YO |
1132 | if (last_separator) { |
1133 | packnamesv = newSVpvn_flags(origname, last_separator - origname, | |
ecad31f0 | 1134 | SVs_TEMP | is_utf8); |
256d1bb2 | 1135 | } else { |
017c5e4e | 1136 | packnamesv = error_report; |
256d1bb2 NC |
1137 | } |
1138 | ||
1139 | Perl_croak(aTHX_ | |
147e3846 KW |
1140 | "Can't locate object method \"%" UTF8f |
1141 | "\" via package \"%" SVf "\"" | |
1142 | " (perhaps you forgot to load \"%" SVf "\"?)", | |
65308f87 | 1143 | UTF8fARG(is_utf8, name_end - name, name), |
ecad31f0 | 1144 | SVfARG(packnamesv), SVfARG(packnamesv)); |
256d1bb2 NC |
1145 | } |
1146 | } | |
463ee0b2 | 1147 | } |
dc848c6f | 1148 | else if (autoload) { |
9d4ba2ae | 1149 | CV* const cv = GvCV(gv); |
09280a33 CS |
1150 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
1151 | GV* stubgv; | |
1152 | GV* autogv; | |
1153 | ||
0c028dca | 1154 | if (CvANON(cv) || CvLEXICAL(cv)) |
09280a33 CS |
1155 | stubgv = gv; |
1156 | else { | |
1157 | stubgv = CvGV(cv); | |
1158 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
1159 | stubgv = gv; | |
1160 | } | |
c8416c26 BF |
1161 | autogv = gv_autoload_pvn(GvSTASH(stubgv), |
1162 | GvNAME(stubgv), GvNAMELEN(stubgv), | |
1163 | GV_AUTOLOAD_ISMETHOD | |
1164 | | (GvNAMEUTF8(stubgv) ? SVf_UTF8 : 0)); | |
dc848c6f | 1165 | if (autogv) |
1166 | gv = autogv; | |
1167 | } | |
1168 | } | |
44a8e56a | 1169 | |
1170 | return gv; | |
1171 | } | |
1172 | ||
1173 | GV* | |
0eeb01b9 | 1174 | Perl_gv_autoload_sv(pTHX_ HV *stash, SV* namesv, U32 flags) |
5fba3c91 BF |
1175 | { |
1176 | char *namepv; | |
1177 | STRLEN namelen; | |
0fe84f7c | 1178 | PERL_ARGS_ASSERT_GV_AUTOLOAD_SV; |
5fba3c91 BF |
1179 | namepv = SvPV(namesv, namelen); |
1180 | if (SvUTF8(namesv)) | |
1181 | flags |= SVf_UTF8; | |
0eeb01b9 | 1182 | return gv_autoload_pvn(stash, namepv, namelen, flags); |
5fba3c91 BF |
1183 | } |
1184 | ||
1185 | GV* | |
0eeb01b9 | 1186 | Perl_gv_autoload_pv(pTHX_ HV *stash, const char *namepv, U32 flags) |
5fba3c91 | 1187 | { |
0fe84f7c | 1188 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PV; |
0eeb01b9 | 1189 | return gv_autoload_pvn(stash, namepv, strlen(namepv), flags); |
5fba3c91 BF |
1190 | } |
1191 | ||
1192 | GV* | |
0eeb01b9 | 1193 | Perl_gv_autoload_pvn(pTHX_ HV *stash, const char *name, STRLEN len, U32 flags) |
44a8e56a | 1194 | { |
44a8e56a | 1195 | GV* gv; |
1196 | CV* cv; | |
1197 | HV* varstash; | |
1198 | GV* vargv; | |
1199 | SV* varsv; | |
c8416c26 BF |
1200 | SV *packname = NULL; |
1201 | U32 is_utf8 = flags & SVf_UTF8 ? SVf_UTF8 : 0; | |
44a8e56a | 1202 | |
0fe84f7c | 1203 | PERL_ARGS_ASSERT_GV_AUTOLOAD_PVN; |
7918f24d | 1204 | |
7edbdc6b | 1205 | if (len == S_autolen && memEQ(name, S_autoload, S_autolen)) |
a0714e2c | 1206 | return NULL; |
0dae17bd GS |
1207 | if (stash) { |
1208 | if (SvTYPE(stash) < SVt_PVHV) { | |
c8416c26 BF |
1209 | STRLEN packname_len = 0; |
1210 | const char * const packname_ptr = SvPV_const(MUTABLE_SV(stash), packname_len); | |
1211 | packname = newSVpvn_flags(packname_ptr, packname_len, | |
1212 | SVs_TEMP | SvUTF8(stash)); | |
5c284bb0 | 1213 | stash = NULL; |
0dae17bd | 1214 | } |
c8416c26 BF |
1215 | else |
1216 | packname = sv_2mortal(newSVhek(HvNAME_HEK(stash))); | |
aae43805 | 1217 | if (flags & GV_SUPER) sv_catpvs(packname, "::SUPER"); |
0dae17bd | 1218 | } |
257dc59d FC |
1219 | if (!(gv = gv_fetchmeth_pvn(stash, S_autoload, S_autolen, FALSE, |
1220 | is_utf8 | (flags & GV_SUPER)))) | |
a0714e2c | 1221 | return NULL; |
dc848c6f | 1222 | cv = GvCV(gv); |
1223 | ||
adb5a9ae | 1224 | if (!(CvROOT(cv) || CvXSUB(cv))) |
a0714e2c | 1225 | return NULL; |
ed850460 | 1226 | |
dc848c6f | 1227 | /* |
64278e8c | 1228 | * Inheriting AUTOLOAD for non-methods no longer works |
dc848c6f | 1229 | */ |
0eeb01b9 FC |
1230 | if ( |
1231 | !(flags & GV_AUTOLOAD_ISMETHOD) | |
1232 | && (GvCVGEN(gv) || GvSTASH(gv) != stash) | |
041457d9 | 1233 | ) |
64278e8c A |
1234 | Perl_croak(aTHX_ "Use of inherited AUTOLOAD for non-method %" SVf |
1235 | "::%" UTF8f "() is no longer allowed", | |
ecad31f0 | 1236 | SVfARG(packname), |
b17a0679 | 1237 | UTF8fARG(is_utf8, len, name)); |
44a8e56a | 1238 | |
aed2304a | 1239 | if (CvISXSUB(cv)) { |
bb619f37 FC |
1240 | /* Instead of forcing the XSUB do another lookup for $AUTOLOAD |
1241 | * and split that value on the last '::', pass along the same data | |
1242 | * via the SvPVX field in the CV, and the stash in CvSTASH. | |
8fa6a409 FC |
1243 | * |
1244 | * Due to an unfortunate accident of history, the SvPVX field | |
e1fa07e3 | 1245 | * serves two purposes. It is also used for the subroutine's pro- |
8fa6a409 FC |
1246 | * type. Since SvPVX has been documented as returning the sub name |
1247 | * for a long time, but not as returning the prototype, we have | |
1248 | * to preserve the SvPVX AUTOLOAD behaviour and put the prototype | |
1249 | * elsewhere. | |
1250 | * | |
1251 | * We put the prototype in the same allocated buffer, but after | |
1252 | * the sub name. The SvPOK flag indicates the presence of a proto- | |
1253 | * type. The CvAUTOLOAD flag indicates the presence of a sub name. | |
1254 | * If both flags are on, then SvLEN is used to indicate the end of | |
1255 | * the prototype (artificially lower than what is actually allo- | |
1256 | * cated), at the risk of having to reallocate a few bytes unneces- | |
1257 | * sarily--but that should happen very rarely, if ever. | |
1258 | * | |
1259 | * We use SvUTF8 for both prototypes and sub names, so if one is | |
1260 | * UTF8, the other must be upgraded. | |
adb5a9ae | 1261 | */ |
c68d9564 | 1262 | CvSTASH_set(cv, stash); |
8fa6a409 | 1263 | if (SvPOK(cv)) { /* Ouch! */ |
e7881358 | 1264 | SV * const tmpsv = newSVpvn_flags(name, len, is_utf8); |
8fa6a409 FC |
1265 | STRLEN ulen; |
1266 | const char *proto = CvPROTO(cv); | |
1267 | assert(proto); | |
1268 | if (SvUTF8(cv)) | |
1269 | sv_utf8_upgrade_flags_grow(tmpsv, 0, CvPROTOLEN(cv) + 2); | |
1270 | ulen = SvCUR(tmpsv); | |
2324bdb9 | 1271 | SvCUR_set(tmpsv, SvCUR(tmpsv) + 1); /* include null in string */ |
8fa6a409 FC |
1272 | sv_catpvn_flags( |
1273 | tmpsv, proto, CvPROTOLEN(cv), SV_CATBYTES*!SvUTF8(cv) | |
1274 | ); | |
1275 | SvTEMP_on(tmpsv); /* Allow theft */ | |
1276 | sv_setsv_nomg((SV *)cv, tmpsv); | |
05b525f4 | 1277 | SvTEMP_off(tmpsv); |
e7881358 | 1278 | SvREFCNT_dec_NN(tmpsv); |
59c3c222 | 1279 | SvLEN_set(cv, SvCUR(cv) + 1); |
2324bdb9 | 1280 | SvCUR_set(cv, ulen); |
8fa6a409 FC |
1281 | } |
1282 | else { | |
1283 | sv_setpvn((SV *)cv, name, len); | |
1284 | SvPOK_off(cv); | |
1285 | if (is_utf8) | |
c8416c26 | 1286 | SvUTF8_on(cv); |
8fa6a409 FC |
1287 | else SvUTF8_off(cv); |
1288 | } | |
1289 | CvAUTOLOAD_on(cv); | |
adb5a9ae | 1290 | } |
adb5a9ae | 1291 | |
44a8e56a | 1292 | /* |
1293 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
1294 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
1295 | * use that, but for lack of anything better we will use the sub's | |
1296 | * original package to look up $AUTOLOAD. | |
1297 | */ | |
18691622 | 1298 | varstash = CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv)); |
5c7983e5 | 1299 | vargv = *(GV**)hv_fetch(varstash, S_autoload, S_autolen, TRUE); |
3d35f11b GS |
1300 | ENTER; |
1301 | ||
c69033f2 | 1302 | if (!isGV(vargv)) { |
04ec7e59 | 1303 | gv_init_pvn(vargv, varstash, S_autoload, S_autolen, 0); |
c69033f2 | 1304 | #ifdef PERL_DONT_CREATE_GVSV |
561b68a9 | 1305 | GvSV(vargv) = newSV(0); |
c69033f2 NC |
1306 | #endif |
1307 | } | |
3d35f11b | 1308 | LEAVE; |
e203899d | 1309 | varsv = GvSVn(vargv); |
4bac9ae4 CS |
1310 | SvTAINTED_off(varsv); /* previous $AUTOLOAD taint is obsolete */ |
1311 | /* XXX: this process is not careful to avoid extra magic gets and sets; tied $AUTOLOAD will get noise */ | |
c8416c26 | 1312 | sv_setsv(varsv, packname); |
396482e1 | 1313 | sv_catpvs(varsv, "::"); |
d40bf27b NC |
1314 | /* Ensure SvSETMAGIC() is called if necessary. In particular, to clear |
1315 | tainting if $FOO::AUTOLOAD was previously tainted, but is not now. */ | |
61a9130e FC |
1316 | sv_catpvn_flags( |
1317 | varsv, name, len, | |
5bcd1ef4 | 1318 | SV_SMAGIC|(is_utf8 ? SV_CATUTF8 : SV_CATBYTES) |
61a9130e | 1319 | ); |
c8416c26 BF |
1320 | if (is_utf8) |
1321 | SvUTF8_on(varsv); | |
a0d0e21e LW |
1322 | return gv; |
1323 | } | |
1324 | ||
44a2ac75 YO |
1325 | |
1326 | /* require_tie_mod() internal routine for requiring a module | |
486ec47a | 1327 | * that implements the logic of automatic ties like %! and %- |
e94ea821 FC |
1328 | * It loads the module and then calls the _tie_it subroutine |
1329 | * with the passed gv as an argument. | |
44a2ac75 YO |
1330 | * |
1331 | * The "gv" parameter should be the glob. | |
ee33cc1a | 1332 | * "varname" holds the 1-char name of the var, used for error messages. |
45cbc99a | 1333 | * "namesv" holds the module name. Its refcount will be decremented. |
45cbc99a | 1334 | * "flags": if flag & 1 then save the scalar before loading. |
44a2ac75 YO |
1335 | * For the protection of $! to work (it is set by this routine) |
1336 | * the sv slot must already be magicalized. | |
d2c93421 | 1337 | */ |
e94ea821 | 1338 | STATIC void |
ee33cc1a | 1339 | S_require_tie_mod(pTHX_ GV *gv, const char varname, const char * name, |
a1683482 | 1340 | STRLEN len, const U32 flags) |
d2c93421 | 1341 | { |
e94ea821 | 1342 | const SV * const target = varname == '[' ? GvSV(gv) : (SV *)GvHV(gv); |
45cbc99a | 1343 | |
7918f24d NC |
1344 | PERL_ARGS_ASSERT_REQUIRE_TIE_MOD; |
1345 | ||
e94ea821 FC |
1346 | /* If it is not tied */ |
1347 | if (!target || !SvRMAGICAL(target) | |
1348 | || !mg_find(target, | |
1349 | varname == '[' ? PERL_MAGIC_tiedscalar : PERL_MAGIC_tied)) | |
1350 | { | |
1351 | HV *stash; | |
1352 | GV **gvp; | |
1353 | dSP; | |
1354 | ||
655f5b26 | 1355 | PUSHSTACKi(PERLSI_MAGIC); |
e94ea821 | 1356 | ENTER; |
e94ea821 | 1357 | |
6881372e FC |
1358 | #define GET_HV_FETCH_TIE_FUNC \ |
1359 | ( (gvp = (GV **)hv_fetchs(stash, "_tie_it", 0)) \ | |
1360 | && *gvp \ | |
1361 | && ( (isGV(*gvp) && GvCV(*gvp)) \ | |
1362 | || (SvROK(*gvp) && SvTYPE(SvRV(*gvp)) == SVt_PVCV) ) \ | |
1363 | ) | |
e94ea821 FC |
1364 | |
1365 | /* Load the module if it is not loaded. */ | |
360cebfd | 1366 | if (!(stash = gv_stashpvn(name, len, 0)) |
6881372e | 1367 | || ! GET_HV_FETCH_TIE_FUNC) |
e94ea821 | 1368 | { |
360cebfd | 1369 | SV * const module = newSVpvn(name, len); |
b82b06b8 | 1370 | const char type = varname == '[' ? '$' : '%'; |
44a2ac75 | 1371 | if ( flags & 1 ) |
45cbc99a | 1372 | save_scalar(gv); |
5b2ef88e | 1373 | Perl_load_module(aTHX_ PERL_LOADMOD_NOIMPORT, module, NULL); |
61bac25c | 1374 | assert(sp == PL_stack_sp); |
360cebfd | 1375 | stash = gv_stashpvn(name, len, 0); |
44a2ac75 | 1376 | if (!stash) |
360cebfd FC |
1377 | Perl_croak(aTHX_ "panic: Can't use %c%c because %s is not available", |
1378 | type, varname, name); | |
6881372e | 1379 | else if (! GET_HV_FETCH_TIE_FUNC) |
360cebfd FC |
1380 | Perl_croak(aTHX_ "panic: Can't use %c%c because %s does not define _tie_it", |
1381 | type, varname, name); | |
e94ea821 FC |
1382 | } |
1383 | /* Now call the tie function. It should be in *gvp. */ | |
6881372e | 1384 | assert(gvp); assert(*gvp); |
e94ea821 FC |
1385 | PUSHMARK(SP); |
1386 | XPUSHs((SV *)gv); | |
1387 | PUTBACK; | |
1388 | call_sv((SV *)*gvp, G_VOID|G_DISCARD); | |
1389 | LEAVE; | |
655f5b26 | 1390 | POPSTACK; |
d2c93421 RH |
1391 | } |
1392 | } | |
1393 | ||
7c719134 YO |
1394 | /* add a require_tie_mod_s - the _s suffix is similar to pvs type suffixes, |
1395 | * IOW it means we do STR_WITH_LEN() ourselves and the user should pass in | |
1396 | * a true string WITHOUT a len. | |
1397 | */ | |
1398 | #define require_tie_mod_s(gv, varname, name, flags) \ | |
1399 | S_require_tie_mod(aTHX_ gv, varname, STR_WITH_LEN(name), flags) | |
1400 | ||
954c1994 GS |
1401 | /* |
1402 | =for apidoc gv_stashpv | |
1403 | ||
da51bb9b | 1404 | Returns a pointer to the stash for a specified package. Uses C<strlen> to |
75c442e4 | 1405 | determine the length of C<name>, then calls C<gv_stashpvn()>. |
954c1994 GS |
1406 | |
1407 | =cut | |
1408 | */ | |
1409 | ||
a0d0e21e | 1410 | HV* |
864dbfa3 | 1411 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
a0d0e21e | 1412 | { |
7918f24d | 1413 | PERL_ARGS_ASSERT_GV_STASHPV; |
dc437b57 | 1414 | return gv_stashpvn(name, strlen(name), create); |
1415 | } | |
1416 | ||
bc96cb06 SH |
1417 | /* |
1418 | =for apidoc gv_stashpvn | |
1419 | ||
da51bb9b NC |
1420 | Returns a pointer to the stash for a specified package. The C<namelen> |
1421 | parameter indicates the length of the C<name>, in bytes. C<flags> is passed | |
1422 | to C<gv_fetchpvn_flags()>, so if set to C<GV_ADD> then the package will be | |
1423 | created if it does not already exist. If the package does not exist and | |
796b6530 | 1424 | C<flags> is 0 (or any other setting that does not create packages) then C<NULL> |
da51bb9b NC |
1425 | is returned. |
1426 | ||
566a4718 YO |
1427 | Flags may be one of: |
1428 | ||
1429 | GV_ADD | |
1430 | SVf_UTF8 | |
1431 | GV_NOADD_NOINIT | |
1432 | GV_NOINIT | |
1433 | GV_NOEXPAND | |
1434 | GV_ADDMG | |
1435 | ||
796b6530 | 1436 | The most important of which are probably C<GV_ADD> and C<SVf_UTF8>. |
bc96cb06 | 1437 | |
808724c8 | 1438 | Note, use of C<gv_stashsv> instead of C<gv_stashpvn> where possible is strongly |
1439 | recommended for performance reasons. | |
1440 | ||
4f8d487a KW |
1441 | =for apidoc Amnh||GV_ADD |
1442 | ||
bc96cb06 SH |
1443 | =cut |
1444 | */ | |
1445 | ||
0eadbdad YO |
1446 | /* |
1447 | gv_stashpvn_internal | |
1448 | ||
1449 | Perform the internal bits of gv_stashsvpvn_cached. You could think of this | |
1450 | as being one half of the logic. Not to be called except from gv_stashsvpvn_cached(). | |
1451 | ||
1452 | */ | |
1453 | ||
4e7ebec5 | 1454 | PERL_STATIC_INLINE HV* |
0eadbdad | 1455 | S_gv_stashpvn_internal(pTHX_ const char *name, U32 namelen, I32 flags) |
dc437b57 | 1456 | { |
0cea0058 | 1457 | char smallbuf[128]; |
46fc3d4c | 1458 | char *tmpbuf; |
a0d0e21e LW |
1459 | HV *stash; |
1460 | GV *tmpgv; | |
add0ecde | 1461 | U32 tmplen = namelen + 2; |
dc437b57 | 1462 | |
0eadbdad | 1463 | PERL_ARGS_ASSERT_GV_STASHPVN_INTERNAL; |
7918f24d | 1464 | |
add0ecde | 1465 | if (tmplen <= sizeof smallbuf) |
46fc3d4c | 1466 | tmpbuf = smallbuf; |
1467 | else | |
add0ecde VP |
1468 | Newx(tmpbuf, tmplen, char); |
1469 | Copy(name, tmpbuf, namelen, char); | |
1470 | tmpbuf[namelen] = ':'; | |
1471 | tmpbuf[namelen+1] = ':'; | |
1472 | tmpgv = gv_fetchpvn_flags(tmpbuf, tmplen, flags, SVt_PVHV); | |
46fc3d4c | 1473 | if (tmpbuf != smallbuf) |
1474 | Safefree(tmpbuf); | |
d2fcb1d6 | 1475 | if (!tmpgv || !isGV_with_GP(tmpgv)) |
da51bb9b | 1476 | return NULL; |
a0d0e21e | 1477 | stash = GvHV(tmpgv); |
1f656fcf | 1478 | if (!(flags & ~GV_NOADD_MASK) && !stash) return NULL; |
9efb5c72 | 1479 | assert(stash); |
1f656fcf | 1480 | if (!HvNAME_get(stash)) { |
0be4d16f | 1481 | hv_name_set(stash, name, namelen, flags & SVf_UTF8 ? SVf_UTF8 : 0 ); |
1f656fcf FC |
1482 | |
1483 | /* FIXME: This is a repeat of logic in gv_fetchpvn_flags */ | |
1484 | /* If the containing stash has multiple effective | |
1485 | names, see that this one gets them, too. */ | |
1486 | if (HvAUX(GvSTASH(tmpgv))->xhv_name_count) | |
1487 | mro_package_moved(stash, NULL, tmpgv, 1); | |
1488 | } | |
a0d0e21e | 1489 | return stash; |
463ee0b2 LW |
1490 | } |
1491 | ||
808724c8 | 1492 | /* |
1493 | gv_stashsvpvn_cached | |
1494 | ||
1495 | Returns a pointer to the stash for a specified package, possibly | |
48a81373 | 1496 | cached. Implements both C<gv_stashpvn> and C<gv_stashsv>. |
808724c8 | 1497 | |
1498 | Requires one of either namesv or namepv to be non-null. | |
1499 | ||
fbe13c60 | 1500 | See C<L</gv_stashpvn>> for details on "flags". |
808724c8 | 1501 | |
1502 | Note the sv interface is strongly preferred for performance reasons. | |
1503 | ||
1504 | */ | |
1505 | ||
1506 | #define PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED \ | |
1507 | assert(namesv || name) | |
1508 | ||
1509 | PERL_STATIC_INLINE HV* | |
1510 | S_gv_stashsvpvn_cached(pTHX_ SV *namesv, const char *name, U32 namelen, I32 flags) | |
4e7ebec5 | 1511 | { |
1512 | HV* stash; | |
808724c8 | 1513 | HE* he; |
1514 | ||
1515 | PERL_ARGS_ASSERT_GV_STASHSVPVN_CACHED; | |
1516 | ||
1517 | he = (HE *)hv_common( | |
1518 | PL_stashcache, namesv, name, namelen, | |
4e7ebec5 | 1519 | (flags & SVf_UTF8) ? HVhek_UTF8 : 0, 0, NULL, 0 |
1520 | ); | |
808724c8 | 1521 | |
78e4f28f DM |
1522 | if (he) { |
1523 | SV *sv = HeVAL(he); | |
1524 | HV *hv; | |
1525 | assert(SvIOK(sv)); | |
1526 | hv = INT2PTR(HV*, SvIVX(sv)); | |
1527 | assert(SvTYPE(hv) == SVt_PVHV); | |
1528 | return hv; | |
1529 | } | |
d283e876 | 1530 | else if (flags & GV_CACHE_ONLY) return NULL; |
4e7ebec5 | 1531 | |
808724c8 | 1532 | if (namesv) { |
1533 | if (SvOK(namesv)) { /* prevent double uninit warning */ | |
1534 | STRLEN len; | |
1535 | name = SvPV_const(namesv, len); | |
1536 | namelen = len; | |
1537 | flags |= SvUTF8(namesv); | |
1538 | } else { | |
1539 | name = ""; namelen = 0; | |
1540 | } | |
1541 | } | |
0eadbdad YO |
1542 | stash = gv_stashpvn_internal(name, namelen, flags); |
1543 | ||
4e7ebec5 | 1544 | if (stash && namelen) { |
1545 | SV* const ref = newSViv(PTR2IV(stash)); | |
0eadbdad | 1546 | (void)hv_store(PL_stashcache, name, |
4e7ebec5 | 1547 | (flags & SVf_UTF8) ? -(I32)namelen : (I32)namelen, ref, 0); |
1548 | } | |
808724c8 | 1549 | |
4e7ebec5 | 1550 | return stash; |
1551 | } | |
1552 | ||
808724c8 | 1553 | HV* |
1554 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 flags) | |
1555 | { | |
1556 | PERL_ARGS_ASSERT_GV_STASHPVN; | |
1557 | return gv_stashsvpvn_cached(NULL, name, namelen, flags); | |
1558 | } | |
1559 | ||
954c1994 GS |
1560 | /* |
1561 | =for apidoc gv_stashsv | |
1562 | ||
fbe13c60 KW |
1563 | Returns a pointer to the stash for a specified package. See |
1564 | C<L</gv_stashpvn>>. | |
954c1994 | 1565 | |
fbe13c60 KW |
1566 | Note this interface is strongly preferred over C<gv_stashpvn> for performance |
1567 | reasons. | |
808724c8 | 1568 | |
954c1994 GS |
1569 | =cut |
1570 | */ | |
1571 | ||
a0d0e21e | 1572 | HV* |
da51bb9b | 1573 | Perl_gv_stashsv(pTHX_ SV *sv, I32 flags) |
a0d0e21e | 1574 | { |
7918f24d | 1575 | PERL_ARGS_ASSERT_GV_STASHSV; |
808724c8 | 1576 | return gv_stashsvpvn_cached(sv, NULL, 0, flags); |
a0d0e21e LW |
1577 | } |
1578 | ||
1579 | ||
463ee0b2 | 1580 | GV * |
fe9845cc | 1581 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, const svtype sv_type) { |
7918f24d | 1582 | PERL_ARGS_ASSERT_GV_FETCHPV; |
b7787f18 | 1583 | return gv_fetchpvn_flags(nambeg, strlen(nambeg), add, sv_type); |
7a5fd60d NC |
1584 | } |
1585 | ||
1586 | GV * | |
fe9845cc | 1587 | Perl_gv_fetchsv(pTHX_ SV *name, I32 flags, const svtype sv_type) { |
7a5fd60d | 1588 | STRLEN len; |
77cb3b01 FC |
1589 | const char * const nambeg = |
1590 | SvPV_flags_const(name, len, flags & GV_NO_SVGMAGIC ? 0 : SV_GMAGIC); | |
7918f24d | 1591 | PERL_ARGS_ASSERT_GV_FETCHSV; |
7a5fd60d NC |
1592 | return gv_fetchpvn_flags(nambeg, len, flags | SvUTF8(name), sv_type); |
1593 | } | |
1594 | ||
90aeefb4 | 1595 | PERL_STATIC_INLINE void |
290a1700 | 1596 | S_gv_magicalize_isa(pTHX_ GV *gv) |
ad7cce9f FR |
1597 | { |
1598 | AV* av; | |
1599 | ||
1600 | PERL_ARGS_ASSERT_GV_MAGICALIZE_ISA; | |
1601 | ||
1602 | av = GvAVn(gv); | |
1603 | GvMULTI_on(gv); | |
1604 | sv_magic(MUTABLE_SV(av), MUTABLE_SV(gv), PERL_MAGIC_isa, | |
1605 | NULL, 0); | |
ad7cce9f FR |
1606 | } |
1607 | ||
90aeefb4 BF |
1608 | /* This function grabs name and tries to split a stash and glob |
1609 | * from its contents. TODO better description, comments | |
1610 | * | |
1611 | * If the function returns TRUE and 'name == name_end', then | |
1612 | * 'gv' can be directly returned to the caller of gv_fetchpvn_flags | |
1613 | */ | |
1614 | PERL_STATIC_INLINE bool | |
1615 | S_parse_gv_stash_name(pTHX_ HV **stash, GV **gv, const char **name, | |
1616 | STRLEN *len, const char *nambeg, STRLEN full_len, | |
1617 | const U32 is_utf8, const I32 add) | |
1618 | { | |
8c573bee | 1619 | char *tmpfullbuf = NULL; /* only malloc one big chunk of memory when the smallbuff is not large enough */ |
90aeefb4 BF |
1620 | const char *name_cursor; |
1621 | const char *const name_end = nambeg + full_len; | |
1622 | const char *const name_em1 = name_end - 1; | |
8c573bee | 1623 | char smallbuf[64]; /* small buffer to avoid a malloc when possible */ |
90aeefb4 BF |
1624 | |
1625 | PERL_ARGS_ASSERT_PARSE_GV_STASH_NAME; | |
1626 | ||
7a207065 KW |
1627 | if ( full_len > 2 |
1628 | && **name == '*' | |
1629 | && isIDFIRST_lazy_if_safe(*name + 1, name_end, is_utf8)) | |
1630 | { | |
90aeefb4 BF |
1631 | /* accidental stringify on a GV? */ |
1632 | (*name)++; | |
1633 | } | |
1634 | ||
1635 | for (name_cursor = *name; name_cursor < name_end; name_cursor++) { | |
1636 | if (name_cursor < name_em1 && | |
1637 | ((*name_cursor == ':' && name_cursor[1] == ':') | |
1638 | || *name_cursor == '\'')) | |
1639 | { | |
1640 | if (!*stash) | |
1641 | *stash = PL_defstash; | |
1642 | if (!*stash || !SvREFCNT(*stash)) /* symbol table under destruction */ | |
657ed7c1 | 1643 | goto notok; |
90aeefb4 BF |
1644 | |
1645 | *len = name_cursor - *name; | |
1646 | if (name_cursor > nambeg) { /* Skip for initial :: or ' */ | |
1647 | const char *key; | |
1648 | GV**gvp; | |
1649 | if (*name_cursor == ':') { | |
1650 | key = *name; | |
1651 | *len += 2; | |
1652 | } | |
f8ac814f | 1653 | else { /* using ' for package separator */ |
8c573bee N |
1654 | /* use our pre-allocated buffer when possible to save a malloc */ |
1655 | char *tmpbuf; | |
1656 | if ( *len+2 <= sizeof smallbuf) | |
1657 | tmpbuf = smallbuf; | |
1658 | else { | |
1659 | /* only malloc once if needed */ | |
1660 | if (tmpfullbuf == NULL) /* only malloc&free once, a little more than needed */ | |
1661 | Newx(tmpfullbuf, full_len+2, char); | |
1662 | tmpbuf = tmpfullbuf; | |
1663 | } | |
90aeefb4 BF |
1664 | Copy(*name, tmpbuf, *len, char); |
1665 | tmpbuf[(*len)++] = ':'; | |
1666 | tmpbuf[(*len)++] = ':'; | |
1667 | key = tmpbuf; | |
1668 | } | |
c161da64 | 1669 | gvp = (GV**)hv_fetch(*stash, key, is_utf8 ? -((I32)*len) : (I32)*len, add); |
90aeefb4 | 1670 | *gv = gvp ? *gvp : NULL; |
f8ac814f | 1671 | if (!*gv || *gv == (const GV *)&PL_sv_undef) { |
657ed7c1 | 1672 | goto notok; |
f8ac814f N |
1673 | } |
1674 | /* here we know that *gv && *gv != &PL_sv_undef */ | |
1675 | if (SvTYPE(*gv) != SVt_PVGV) | |
1676 | gv_init_pvn(*gv, *stash, key, *len, (add & GV_ADDMULTI)|is_utf8); | |
1677 | else | |
1678 | GvMULTI_on(*gv); | |
90aeefb4 BF |
1679 | |
1680 | if (!(*stash = GvHV(*gv))) { | |
1681 | *stash = GvHV(*gv) = newHV(); | |
1682 | if (!HvNAME_get(*stash)) { | |
1683 | if (GvSTASH(*gv) == PL_defstash && *len == 6 | |
c8b388b0 | 1684 | && strBEGINs(*name, "CORE")) |
4c4f3c46 | 1685 | hv_name_sets(*stash, "CORE", 0); |
90aeefb4 BF |
1686 | else |
1687 | hv_name_set( | |
1688 | *stash, nambeg, name_cursor-nambeg, is_utf8 | |
1689 | ); | |
1690 | /* If the containing stash has multiple effective | |
1691 | names, see that this one gets them, too. */ | |
1692 | if (HvAUX(GvSTASH(*gv))->xhv_name_count) | |
1693 | mro_package_moved(*stash, NULL, *gv, 1); | |
1694 | } | |
1695 | } | |
1696 | else if (!HvNAME_get(*stash)) | |
1697 | hv_name_set(*stash, nambeg, name_cursor - nambeg, is_utf8); | |
1698 | } | |
1699 | ||
1700 | if (*name_cursor == ':') | |
1701 | name_cursor++; | |
1702 | *name = name_cursor+1; | |
1703 | if (*name == name_end) { | |
120921ac Z |
1704 | if (!*gv) { |
1705 | *gv = MUTABLE_GV(*hv_fetchs(PL_defstash, "main::", TRUE)); | |
1706 | if (SvTYPE(*gv) != SVt_PVGV) { | |
1707 | gv_init_pvn(*gv, PL_defstash, "main::", 6, | |
1708 | GV_ADDMULTI); | |
1709 | GvHV(*gv) = | |
1710 | MUTABLE_HV(SvREFCNT_inc_simple(PL_defstash)); | |
1711 | } | |
1712 | } | |
657ed7c1 | 1713 | goto ok; |
90aeefb4 BF |
1714 | } |
1715 | } | |
1716 | } | |
1717 | *len = name_cursor - *name; | |
657ed7c1 DM |
1718 | ok: |
1719 | Safefree(tmpfullbuf); /* free our tmpfullbuf if it was used */ | |
90aeefb4 | 1720 | return TRUE; |
657ed7c1 DM |
1721 | notok: |
1722 | Safefree(tmpfullbuf); /* free our tmpfullbuf if it was used */ | |
1723 | return FALSE; | |
90aeefb4 BF |
1724 | } |
1725 | ||
657ed7c1 | 1726 | |
536d1a88 | 1727 | /* Checks if an unqualified name is in the main stash */ |
90aeefb4 | 1728 | PERL_STATIC_INLINE bool |
536d1a88 | 1729 | S_gv_is_in_main(pTHX_ const char *name, STRLEN len, const U32 is_utf8) |
90aeefb4 | 1730 | { |
536d1a88 | 1731 | PERL_ARGS_ASSERT_GV_IS_IN_MAIN; |
90aeefb4 | 1732 | |
90aeefb4 | 1733 | /* If it's an alphanumeric variable */ |
7a207065 | 1734 | if ( len && isIDFIRST_lazy_if_safe(name, name + len, is_utf8) ) { |
90aeefb4 BF |
1735 | /* Some "normal" variables are always in main::, |
1736 | * like INC or STDOUT. | |
1737 | */ | |
1738 | switch (len) { | |
1739 | case 1: | |
1740 | if (*name == '_') | |
536d1a88 | 1741 | return TRUE; |
90aeefb4 BF |
1742 | break; |
1743 | case 3: | |
1744 | if ((name[0] == 'I' && name[1] == 'N' && name[2] == 'C') | |
1745 | || (name[0] == 'E' && name[1] == 'N' && name[2] == 'V') | |
1746 | || (name[0] == 'S' && name[1] == 'I' && name[2] == 'G')) | |
536d1a88 | 1747 | return TRUE; |
90aeefb4 BF |
1748 | break; |
1749 | case 4: | |
1750 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1751 | && name[3] == 'V') | |
536d1a88 | 1752 | return TRUE; |
90aeefb4 BF |
1753 | break; |
1754 | case 5: | |
1755 | if (name[0] == 'S' && name[1] == 'T' && name[2] == 'D' | |
1756 | && name[3] == 'I' && name[4] == 'N') | |
536d1a88 | 1757 | return TRUE; |
90aeefb4 BF |
1758 | break; |
1759 | case 6: | |
1760 | if ((name[0] == 'S' && name[1] == 'T' && name[2] == 'D') | |
1761 | &&((name[3] == 'O' && name[4] == 'U' && name[5] == 'T') | |
1762 | ||(name[3] == 'E' && name[4] == 'R' && name[5] == 'R'))) | |
536d1a88 | 1763 | return TRUE; |
90aeefb4 BF |
1764 | break; |
1765 | case 7: | |
1766 | if (name[0] == 'A' && name[1] == 'R' && name[2] == 'G' | |
1767 | && name[3] == 'V' && name[4] == 'O' && name[5] == 'U' | |
1768 | && name[6] == 'T') | |
536d1a88 | 1769 | return TRUE; |
90aeefb4 BF |
1770 | break; |
1771 | } | |
536d1a88 BF |
1772 | } |
1773 | /* *{""}, or a special variable like $@ */ | |
1774 | else | |
1775 | return TRUE; | |
1776 | ||
1777 | return FALSE; | |
1778 | } | |
1779 | ||
1780 | ||
1781 | /* This function is called if parse_gv_stash_name() failed to | |
1782 | * find a stash, or if GV_NOTQUAL or an empty name was passed | |
1783 | * to gv_fetchpvn_flags. | |
1784 | * | |
1785 | * It returns FALSE if the default stash can't be found nor created, | |
1786 | * which might happen during global destruction. | |
1787 | */ | |
1788 | PERL_STATIC_INLINE bool | |
1789 | S_find_default_stash(pTHX_ HV **stash, const char *name, STRLEN len, | |
1790 | const U32 is_utf8, const I32 add, | |
1791 | const svtype sv_type) | |
1792 | { | |
1793 | PERL_ARGS_ASSERT_FIND_DEFAULT_STASH; | |
1794 | ||
1795 | /* No stash in name, so see how we can default */ | |
90aeefb4 | 1796 | |
536d1a88 BF |
1797 | if ( gv_is_in_main(name, len, is_utf8) ) { |
1798 | *stash = PL_defstash; | |
1799 | } | |
1800 | else { | |
1801 | if (IN_PERL_COMPILETIME) { | |
90aeefb4 BF |
1802 | *stash = PL_curstash; |
1803 | if (add && (PL_hints & HINT_STRICT_VARS) && | |
1804 | sv_type != SVt_PVCV && | |
1805 | sv_type != SVt_PVGV && | |
1806 | sv_type != SVt_PVFM && | |
1807 | sv_type != SVt_PVIO && | |
1808 | !(len == 1 && sv_type == SVt_PV && | |
1809 | (*name == 'a' || *name == 'b')) ) | |
1810 | { | |
c161da64 | 1811 | GV**gvp = (GV**)hv_fetch(*stash,name,is_utf8 ? -(I32)len : (I32)len,0); |
90aeefb4 BF |
1812 | if (!gvp || *gvp == (const GV *)&PL_sv_undef || |
1813 | SvTYPE(*gvp) != SVt_PVGV) | |
1814 | { | |
1815 | *stash = NULL; | |
1816 | } | |
1817 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || | |
1818 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || | |
1819 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) | |
1820 | { | |
1821 | /* diag_listed_as: Variable "%s" is not imported%s */ | |
1822 | Perl_ck_warner_d( | |
1823 | aTHX_ packWARN(WARN_MISC), | |
147e3846 | 1824 | "Variable \"%c%" UTF8f "\" is not imported", |
90aeefb4 BF |
1825 | sv_type == SVt_PVAV ? '@' : |
1826 | sv_type == SVt_PVHV ? '%' : '$', | |
1827 | UTF8fARG(is_utf8, len, name)); | |
1828 | if (GvCVu(*gvp)) | |
1829 | Perl_ck_warner_d( | |
1830 | aTHX_ packWARN(WARN_MISC), | |
147e3846 | 1831 | "\t(Did you mean &%" UTF8f " instead?)\n", |
90aeefb4 BF |
1832 | UTF8fARG(is_utf8, len, name) |
1833 | ); | |
1834 | *stash = NULL; | |
1835 | } | |
1836 | } | |
1837 | } | |
1838 | else { | |
1839 | /* Use the current op's stash */ | |
1840 | *stash = CopSTASH(PL_curcop); | |
1841 | } | |
1842 | } | |
90aeefb4 BF |
1843 | |
1844 | if (!*stash) { | |
1845 | if (add && !PL_in_clean_all) { | |
10860bf4 FC |
1846 | GV *gv; |
1847 | qerror(Perl_mess(aTHX_ | |
147e3846 | 1848 | "Global symbol \"%s%" UTF8f |
d8c6310a | 1849 | "\" requires explicit package name (did you forget to " |
147e3846 | 1850 | "declare \"my %s%" UTF8f "\"?)", |
d8c6310a FC |
1851 | (sv_type == SVt_PV ? "$" |
1852 | : sv_type == SVt_PVAV ? "@" | |
1853 | : sv_type == SVt_PVHV ? "%" | |
1854 | : ""), UTF8fARG(is_utf8, len, name), | |
90aeefb4 BF |
1855 | (sv_type == SVt_PV ? "$" |
1856 | : sv_type == SVt_PVAV ? "@" | |
1857 | : sv_type == SVt_PVHV ? "%" | |
10860bf4 | 1858 | : ""), UTF8fARG(is_utf8, len, name))); |
cd164bf8 BF |
1859 | /* To maintain the output of errors after the strict exception |
1860 | * above, and to keep compat with older releases, rather than | |
1861 | * placing the variables in the pad, we place | |
1862 | * them in the <none>:: stash. | |
1863 | */ | |
90aeefb4 BF |
1864 | gv = gv_fetchpvs("<none>::", GV_ADDMULTI, SVt_PVHV); |
1865 | if (!gv) { | |
1866 | /* symbol table under destruction */ | |
1867 | return FALSE; | |
1868 | } | |
1869 | *stash = GvHV(gv); | |
1870 | } | |
1871 | else | |
1872 | return FALSE; | |
1873 | } | |
1874 | ||
1875 | if (!SvREFCNT(*stash)) /* symbol table under destruction */ | |
1876 | return FALSE; | |
1877 | ||
1878 | return TRUE; | |
1879 | } | |
1880 | ||
8c995aba FC |
1881 | /* gv_magicalize only turns on the SVf_READONLY flag, not SVf_PROTECT. So |
1882 | redefine SvREADONLY_on for that purpose. We don’t use it later on in | |
1883 | this file. */ | |
1884 | #undef SvREADONLY_on | |
1885 | #define SvREADONLY_on(sv) (SvFLAGS(sv) |= SVf_READONLY) | |
1886 | ||
930867a8 BF |
1887 | /* gv_magicalize() is called by gv_fetchpvn_flags when creating |
1888 | * a new GV. | |
1889 | * Note that it does not insert the GV into the stash prior to | |
1890 | * magicalization, which some variables require need in order | |
c22e17d0 | 1891 | * to work (like %+, %-, %!), so callers must take care of |
1321bbe3 | 1892 | * that. |
930867a8 | 1893 | * |
1321bbe3 FC |
1894 | * It returns true if the gv did turn out to be magical one; i.e., |
1895 | * if gv_magicalize actually did something. | |
930867a8 BF |
1896 | */ |
1897 | PERL_STATIC_INLINE bool | |
1898 | S_gv_magicalize(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, | |
1321bbe3 | 1899 | const svtype sv_type) |
79072805 | 1900 | { |
960b831f | 1901 | SSize_t paren; |
79072805 | 1902 | |
930867a8 | 1903 | PERL_ARGS_ASSERT_GV_MAGICALIZE; |
90aeefb4 | 1904 | |
44428a46 | 1905 | if (stash != PL_defstash) { /* not the main stash */ |
ea238638 | 1906 | /* We only have to check for a few names here: a, b, EXPORT, ISA |
4aaa4757 FC |
1907 | and VERSION. All the others apply only to the main stash or to |
1908 | CORE (which is checked right after this). */ | |
ea238638 | 1909 | if (len) { |
cc4c2da6 | 1910 | switch (*name) { |
cc4c2da6 | 1911 | case 'E': |
3092ee0c YO |
1912 | if ( |
1913 | len >= 6 && name[1] == 'X' && | |
1914 | (memEQs(name, len, "EXPORT") | |
eafd371c YO |
1915 | ||memEQs(name, len, "EXPORT_OK") |
1916 | ||memEQs(name, len, "EXPORT_FAIL") | |
3092ee0c | 1917 | ||memEQs(name, len, "EXPORT_TAGS")) |
eafd371c | 1918 | ) |
cc4c2da6 NC |
1919 | GvMULTI_on(gv); |
1920 | break; | |
1921 | case 'I': | |
eafd371c | 1922 | if (memEQs(name, len, "ISA")) |
290a1700 | 1923 | gv_magicalize_isa(gv); |
cc4c2da6 | 1924 | break; |
44428a46 | 1925 | case 'V': |
eafd371c | 1926 | if (memEQs(name, len, "VERSION")) |
44428a46 FC |
1927 | GvMULTI_on(gv); |
1928 | break; | |
ea238638 | 1929 | case 'a': |
eafd371c | 1930 | if (stash == PL_debstash && memEQs(name, len, "args")) { |
7bb33634 FC |
1931 | GvMULTI_on(gv_AVadd(gv)); |
1932 | break; | |
eafd371c YO |
1933 | } |
1934 | /* FALLTHROUGH */ | |
ea238638 FC |
1935 | case 'b': |
1936 | if (len == 1 && sv_type == SVt_PV) | |
1937 | GvMULTI_on(gv); | |
924ba076 | 1938 | /* FALLTHROUGH */ |
4aaa4757 FC |
1939 | default: |
1940 | goto try_core; | |
1941 | } | |
1321bbe3 | 1942 | goto ret; |
4aaa4757 FC |
1943 | } |
1944 | try_core: | |
1945 | if (len > 1 /* shortest is uc */ && HvNAMELEN_get(stash) == 4) { | |
1946 | /* Avoid null warning: */ | |
1947 | const char * const stashname = HvNAME(stash); assert(stashname); | |
c8b388b0 | 1948 | if (strBEGINs(stashname, "CORE")) |
87566176 | 1949 | S_maybe_add_coresub(aTHX_ 0, gv, name, len); |
44428a46 FC |
1950 | } |
1951 | } | |
1952 | else if (len > 1) { | |
1953 | #ifndef EBCDIC | |
1954 | if (*name > 'V' ) { | |
1955 | NOOP; | |
1956 | /* Nothing else to do. | |
1957 | The compiler will probably turn the switch statement into a | |
1958 | branch table. Make sure we avoid even that small overhead for | |
2ae25f5c KW |
1959 | the common case of lower case variable names. (On EBCDIC |
1960 | platforms, we can't just do: | |
1961 | if (NATIVE_TO_ASCII(*name) > NATIVE_TO_ASCII('V') ) { | |
1962 | because cases like '\027' in the switch statement below are | |
1963 | C1 (non-ASCII) controls on those platforms, so the remapping | |
1964 | would make them larger than 'V') | |
1965 | */ | |
44428a46 FC |
1966 | } else |
1967 | #endif | |
1968 | { | |
44428a46 FC |
1969 | switch (*name) { |
1970 | case 'A': | |
eafd371c | 1971 | if (memEQs(name, len, "ARGV")) { |
44428a46 FC |
1972 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
1973 | } | |
eafd371c | 1974 | else if (memEQs(name, len, "ARGVOUT")) { |
44428a46 FC |
1975 | GvMULTI_on(gv); |
1976 | } | |
1977 | break; | |
1978 | case 'E': | |
3092ee0c YO |
1979 | if ( |
1980 | len >= 6 && name[1] == 'X' && | |
1981 | (memEQs(name, len, "EXPORT") | |
055ae706 YO |
1982 | ||memEQs(name, len, "EXPORT_OK") |
1983 | ||memEQs(name, len, "EXPORT_FAIL") | |
3092ee0c | 1984 | ||memEQs(name, len, "EXPORT_TAGS")) |
055ae706 | 1985 | ) |
44428a46 FC |
1986 | GvMULTI_on(gv); |
1987 | break; | |
1988 | case 'I': | |
eafd371c | 1989 | if (memEQs(name, len, "ISA")) { |
290a1700 | 1990 | gv_magicalize_isa(gv); |
44428a46 FC |
1991 | } |
1992 | break; | |
cc4c2da6 | 1993 | case 'S': |
eafd371c | 1994 | if (memEQs(name, len, "SIG")) { |
cc4c2da6 NC |
1995 | HV *hv; |
1996 | I32 i; | |
d525a7b2 NC |
1997 | if (!PL_psig_name) { |
1998 | Newxz(PL_psig_name, 2 * SIG_SIZE, SV*); | |
a02a5408 | 1999 | Newxz(PL_psig_pend, SIG_SIZE, int); |
d525a7b2 | 2000 | PL_psig_ptr = PL_psig_name + SIG_SIZE; |
0bdedcb3 NC |
2001 | } else { |
2002 | /* I think that the only way to get here is to re-use an | |
2003 | embedded perl interpreter, where the previous | |
2004 | use didn't clean up fully because | |
2005 | PL_perl_destruct_level was 0. I'm not sure that we | |
2006 | "support" that, in that I suspect in that scenario | |
2007 | there are sufficient other garbage values left in the | |
2008 | interpreter structure that something else will crash | |
2009 | before we get here. I suspect that this is one of | |
2010 | those "doctor, it hurts when I do this" bugs. */ | |
d525a7b2 | 2011 | Zero(PL_psig_name, 2 * SIG_SIZE, SV*); |
0bdedcb3 | 2012 | Zero(PL_psig_pend, SIG_SIZE, int); |
cc4c2da6 NC |
2013 | } |
2014 | GvMULTI_on(gv); | |
2015 | hv = GvHVn(gv); | |
a0714e2c | 2016 | hv_magic(hv, NULL, PERL_MAGIC_sig); |
cc4c2da6 | 2017 | for (i = 1; i < SIG_SIZE; i++) { |
551405c4 | 2018 | SV * const * const init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
cc4c2da6 NC |
2019 | if (init) |
2020 | sv_setsv(*init, &PL_sv_undef); | |
cc4c2da6 NC |
2021 | } |
2022 | } | |
2023 | break; | |
2024 | case 'V': | |
eafd371c | 2025 | if (memEQs(name, len, "VERSION")) |
cc4c2da6 NC |
2026 | GvMULTI_on(gv); |
2027 | break; | |
e5218da5 | 2028 | case '\003': /* $^CHILD_ERROR_NATIVE */ |
eafd371c | 2029 | if (memEQs(name, len, "\003HILD_ERROR_NATIVE")) |
e5218da5 | 2030 | goto magicalize; |
27deb0cf YO |
2031 | /* @{^CAPTURE} %{^CAPTURE} */ |
2032 | if (memEQs(name, len, "\003APTURE")) { | |
2033 | AV* const av = GvAVn(gv); | |
fa531f32 | 2034 | const Size_t n = *name; |
27deb0cf | 2035 | |
fa531f32 | 2036 | sv_magic(MUTABLE_SV(av), (SV*)n, PERL_MAGIC_regdata, NULL, 0); |
27deb0cf YO |
2037 | SvREADONLY_on(av); |
2038 | ||
d8422270 | 2039 | require_tie_mod_s(gv, '+', "Tie::Hash::NamedCapture",0); |
27deb0cf YO |
2040 | |
2041 | } else /* %{^CAPTURE_ALL} */ | |
2042 | if (memEQs(name, len, "\003APTURE_ALL")) { | |
d8422270 | 2043 | require_tie_mod_s(gv, '-', "Tie::Hash::NamedCapture",0); |
27deb0cf | 2044 | } |
e5218da5 | 2045 | break; |
cc4c2da6 | 2046 | case '\005': /* $^ENCODING */ |
eafd371c | 2047 | if (memEQs(name, len, "\005NCODING")) |
cc4c2da6 NC |
2048 | goto magicalize; |
2049 | break; | |
9ebf26ad | 2050 | case '\007': /* $^GLOBAL_PHASE */ |
eafd371c | 2051 | if (memEQs(name, len, "\007LOBAL_PHASE")) |
9ebf26ad FR |
2052 | goto ro_magicalize; |
2053 | break; | |
8561ea1d | 2054 | case '\014': /* $^LAST_FH */ |
eafd371c | 2055 | if (memEQs(name, len, "\014AST_FH")) |
8561ea1d FC |
2056 | goto ro_magicalize; |
2057 | break; | |
cde0cee5 | 2058 | case '\015': /* $^MATCH */ |
eafd371c | 2059 | if (memEQs(name, len, "\015ATCH")) { |
960b831f NC |
2060 | paren = RX_BUFF_IDX_CARET_FULLMATCH; |
2061 | goto storeparen; | |
2062 | } | |
66230c86 | 2063 | break; |
cc4c2da6 | 2064 | case '\017': /* $^OPEN */ |
eafd371c | 2065 | if (memEQs(name, len, "\017PEN")) |
cc4c2da6 NC |
2066 | goto magicalize; |
2067 | break; | |
cde0cee5 | 2068 | case '\020': /* $^PREMATCH $^POSTMATCH */ |
eafd371c | 2069 | if (memEQs(name, len, "\020REMATCH")) { |
960b831f NC |
2070 | paren = RX_BUFF_IDX_CARET_PREMATCH; |
2071 | goto storeparen; | |
2072 | } | |
eafd371c | 2073 | if (memEQs(name, len, "\020OSTMATCH")) { |
960b831f NC |
2074 | paren = RX_BUFF_IDX_CARET_POSTMATCH; |
2075 | goto storeparen; | |
2076 | } | |
9ebf26ad | 2077 | break; |
f512d242 KW |
2078 | case '\023': |
2079 | if (memEQs(name, len, "\023AFE_LOCALES")) | |
2080 | goto ro_magicalize; | |
2081 | break; | |
cc4c2da6 | 2082 | case '\024': /* ${^TAINT} */ |
eafd371c | 2083 | if (memEQs(name, len, "\024AINT")) |
cc4c2da6 NC |
2084 | goto ro_magicalize; |
2085 | break; | |
7cebcbc0 | 2086 | case '\025': /* ${^UNICODE}, ${^UTF8LOCALE} */ |
eafd371c | 2087 | if (memEQs(name, len, "\025NICODE")) |
cc4c2da6 | 2088 | goto ro_magicalize; |
eafd371c | 2089 | if (memEQs(name, len, "\025TF8LOCALE")) |
7cebcbc0 | 2090 | goto ro_magicalize; |
eafd371c | 2091 | if (memEQs(name, len, "\025TF8CACHE")) |
e07ea26a | 2092 | goto magicalize; |
cc4c2da6 NC |
2093 | break; |
2094 | case '\027': /* $^WARNING_BITS */ | |
eafd371c | 2095 | if (memEQs(name, len, "\027ARNING_BITS")) |
cc4c2da6 | 2096 | goto magicalize; |
8ca2a5d6 | 2097 | #ifdef WIN32 |
eafd371c | 2098 | else if (memEQs(name, len, "\027IN32_SLOPPY_STAT")) |
8ca2a5d6 DD |
2099 | goto magicalize; |
2100 | #endif | |
cc4c2da6 NC |
2101 | break; |
2102 | case '1': | |
2103 | case '2': | |
2104 | case '3': | |
2105 | case '4': | |
2106 | case '5': | |
2107 | case '6': | |
2108 | case '7': | |
2109 | case '8': | |
2110 | case '9': | |
85e6fe83 | 2111 | { |
2fdbfb4d AB |
2112 | /* Ensures that we have an all-digit variable, ${"1foo"} fails |
2113 | this test */ | |
22ff3130 HS |
2114 | UV uv; |
2115 | if (!grok_atoUV(name, &uv, NULL) || uv > I32_MAX) | |
1321bbe3 | 2116 | goto ret; |
22ff3130 HS |
2117 | /* XXX why are we using a SSize_t? */ |
2118 | paren = (SSize_t)(I32)uv; | |
960b831f | 2119 | goto storeparen; |
1d7c1841 | 2120 | } |
dc437b57 | 2121 | } |
93a17b20 | 2122 | } |
392db708 NC |
2123 | } else { |
2124 | /* Names of length 1. (Or 0. But name is NUL terminated, so that will | |
2125 | be case '\0' in this switch statement (ie a default case) */ | |
cc4c2da6 | 2126 | switch (*name) { |
6361f656 | 2127 | case '&': /* $& */ |
960b831f NC |
2128 | paren = RX_BUFF_IDX_FULLMATCH; |
2129 | goto sawampersand; | |
6361f656 | 2130 | case '`': /* $` */ |
960b831f NC |
2131 | paren = RX_BUFF_IDX_PREMATCH; |
2132 | goto sawampersand; | |
6361f656 | 2133 | case '\'': /* $' */ |
960b831f NC |
2134 | paren = RX_BUFF_IDX_POSTMATCH; |
2135 | sawampersand: | |
1a904fc8 | 2136 | #ifdef PERL_SAWAMPERSAND |
a289ef89 | 2137 | if (!( |
cc4c2da6 NC |
2138 | sv_type == SVt_PVAV || |
2139 | sv_type == SVt_PVHV || | |
2140 | sv_type == SVt_PVCV || | |
2141 | sv_type == SVt_PVFM || | |
2142 | sv_type == SVt_PVIO | |
d3b97530 DM |
2143 | )) { PL_sawampersand |= |
2144 | (*name == '`') | |
2145 | ? SAWAMPERSAND_LEFT | |
2146 | : (*name == '&') | |
2147 | ? SAWAMPERSAND_MIDDLE | |
2148 | : SAWAMPERSAND_RIGHT; | |
2149 | } | |
1a904fc8 | 2150 | #endif |
960b831f | 2151 | goto storeparen; |
e91d8259 NC |
2152 | case '1': /* $1 */ |
2153 | case '2': /* $2 */ | |
2154 | case '3': /* $3 */ | |
2155 | case '4': /* $4 */ | |
2156 | case '5': /* $5 */ | |
2157 | case '6': /* $6 */ | |
2158 | case '7': /* $7 */ | |
2159 | case '8': /* $8 */ | |
2160 | case '9': /* $9 */ | |
960b831f NC |
2161 | paren = *name - '0'; |
2162 | ||
2163 | storeparen: | |
e91d8259 NC |
2164 | /* Flag the capture variables with a NULL mg_ptr |
2165 | Use mg_len for the array index to lookup. */ | |
960b831f | 2166 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, NULL, paren); |
e91d8259 | 2167 | break; |
cc4c2da6 | 2168 | |
6361f656 | 2169 | case ':': /* $: */ |
c69033f2 | 2170 | sv_setpv(GvSVn(gv),PL_chopset); |
cc4c2da6 NC |
2171 | goto magicalize; |
2172 | ||
6361f656 | 2173 | case '?': /* $? */ |
ff0cee69 | 2174 | #ifdef COMPLEX_STATUS |
c69033f2 | 2175 | SvUPGRADE(GvSVn(gv), SVt_PVLV); |
ff0cee69 | 2176 | #endif |
cc4c2da6 | 2177 | goto magicalize; |
ff0cee69 | 2178 | |
6361f656 | 2179 | case '!': /* $! */ |
67261566 | 2180 | GvMULTI_on(gv); |
44a2ac75 | 2181 | /* If %! has been used, automatically load Errno.pm. */ |
d2c93421 | 2182 | |
ad64d0ec | 2183 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
d2c93421 | 2184 | |
7c719134 | 2185 | /* magicalization must be done before require_tie_mod_s is called */ |
67261566 | 2186 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) |
7c719134 | 2187 | require_tie_mod_s(gv, '!', "Errno", 1); |
d2c93421 | 2188 | |
6cef1e77 | 2189 | break; |
754f85ad YO |
2190 | case '-': /* $-, %-, @- */ |
2191 | case '+': /* $+, %+, @+ */ | |
27deb0cf YO |
2192 | GvMULTI_on(gv); /* no used once warnings here */ |
2193 | { /* $- $+ */ | |
2194 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); | |
2195 | if (*name == '+') | |
2196 | SvREADONLY_on(GvSVn(gv)); | |
2197 | } | |
2198 | { /* %- %+ */ | |
2199 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) | |
2200 | require_tie_mod_s(gv, *name, "Tie::Hash::NamedCapture",0); | |
2201 | } | |
2202 | { /* @- @+ */ | |
2203 | AV* const av = GvAVn(gv); | |
fa531f32 | 2204 | const Size_t n = *name; |
67261566 | 2205 | |
fa531f32 | 2206 | sv_magic(MUTABLE_SV(av), (SV*)n, PERL_MAGIC_regdata, NULL, 0); |
27deb0cf YO |
2207 | SvREADONLY_on(av); |
2208 | } | |
80305961 | 2209 | break; |
a678626e A |
2210 | case '*': /* $* */ |
2211 | case '#': /* $# */ | |
dcb414ac JK |
2212 | if (sv_type == SVt_PV) |
2213 | /* diag_listed_as: $* is no longer supported as of Perl 5.30 */ | |
2214 | Perl_croak(aTHX_ "$%c is no longer supported as of Perl 5.30", *name); | |
2215 | break; | |
b3ca2e83 NC |
2216 | case '\010': /* $^H */ |
2217 | { | |
2218 | HV *const hv = GvHVn(gv); | |
2219 | hv_magic(hv, NULL, PERL_MAGIC_hints); | |
2220 | } | |
2221 | goto magicalize; | |
cc4c2da6 | 2222 | case '\023': /* $^S */ |
2fdbfb4d AB |
2223 | ro_magicalize: |
2224 | SvREADONLY_on(GvSVn(gv)); | |
924ba076 | 2225 | /* FALLTHROUGH */ |
6361f656 | 2226 | case '0': /* $0 */ |
6361f656 AB |
2227 | case '^': /* $^ */ |
2228 | case '~': /* $~ */ | |
2229 | case '=': /* $= */ | |
2230 | case '%': /* $% */ | |
2231 | case '.': /* $. */ | |
2232 | case '(': /* $( */ | |
2233 | case ')': /* $) */ | |
2234 | case '<': /* $< */ | |
2235 | case '>': /* $> */ | |
2236 | case '\\': /* $\ */ | |
2237 | case '/': /* $/ */ | |
4505a31f | 2238 | case '|': /* $| */ |
9cdac2a2 | 2239 | case '$': /* $$ */ |
c22e17d0 | 2240 | case '[': /* $[ */ |
cc4c2da6 NC |
2241 | case '\001': /* $^A */ |
2242 | case '\003': /* $^C */ | |
2243 | case '\004': /* $^D */ | |
2244 | case '\005': /* $^E */ | |
2245 | case '\006': /* $^F */ | |
cc4c2da6 NC |
2246 | case '\011': /* $^I, NOT \t in EBCDIC */ |
2247 | case '\016': /* $^N */ | |
2248 | case '\017': /* $^O */ | |
2249 | case '\020': /* $^P */ | |
2250 | case '\024': /* $^T */ | |
2251 | case '\027': /* $^W */ | |
2252 | magicalize: | |
ad64d0ec | 2253 | sv_magic(GvSVn(gv), MUTABLE_SV(gv), PERL_MAGIC_sv, name, len); |
cc4c2da6 | 2254 | break; |
e521374c | 2255 | |
cc4c2da6 | 2256 | case '\014': /* $^L */ |
76f68e9b | 2257 | sv_setpvs(GvSVn(gv),"\f"); |
463ee0b2 | 2258 | break; |
6361f656 | 2259 | case ';': /* $; */ |
76f68e9b | 2260 | sv_setpvs(GvSVn(gv),"\034"); |
463ee0b2 | 2261 | break; |
6361f656 | 2262 | case ']': /* $] */ |
cc4c2da6 | 2263 | { |
3638bf15 | 2264 | SV * const sv = GvSV(gv); |
d7aa5382 | 2265 | if (!sv_derived_from(PL_patchlevel, "version")) |
ac0e6a2f | 2266 | upg_version(PL_patchlevel, TRUE); |
7d54d38e SH |
2267 | GvSV(gv) = vnumify(PL_patchlevel); |
2268 | SvREADONLY_on(GvSV(gv)); | |
2269 | SvREFCNT_dec(sv); | |
93a17b20 LW |
2270 | } |
2271 | break; | |
cc4c2da6 NC |
2272 | case '\026': /* $^V */ |
2273 | { | |
3638bf15 | 2274 | SV * const sv = GvSV(gv); |
f9be5ac8 DM |
2275 | GvSV(gv) = new_version(PL_patchlevel); |
2276 | SvREADONLY_on(GvSV(gv)); | |
2277 | SvREFCNT_dec(sv); | |
16070b82 GS |
2278 | } |
2279 | break; | |
ea238638 FC |
2280 | case 'a': |
2281 | case 'b': | |
dc3e91f6 | 2282 | if (sv_type == SVt_PV) |
ea238638 | 2283 | GvMULTI_on(gv); |
cc4c2da6 | 2284 | } |
79072805 | 2285 | } |
930867a8 | 2286 | |
1321bbe3 FC |
2287 | ret: |
2288 | /* Return true if we actually did something. */ | |
2289 | return GvAV(gv) || GvHV(gv) || GvIO(gv) || GvCV(gv) | |
2290 | || ( GvSV(gv) && ( | |
2291 | SvOK(GvSV(gv)) || SvMAGICAL(GvSV(gv)) | |
2292 | ) | |
2293 | ); | |
71c35c05 BF |
2294 | } |
2295 | ||
8c995aba FC |
2296 | /* If we do ever start using this later on in the file, we need to make |
2297 | sure we don’t accidentally use the wrong definition. */ | |
2298 | #undef SvREADONLY_on | |
2299 | ||
070dc475 BF |
2300 | /* This function is called when the stash already holds the GV of the magic |
2301 | * variable we're looking for, but we need to check that it has the correct | |
2302 | * kind of magic. For example, if someone first uses $! and then %!, the | |
2303 | * latter would end up here, and we add the Errno tie to the HASH slot of | |
2304 | * the *! glob. | |
2305 | */ | |
2306 | PERL_STATIC_INLINE void | |
2307 | S_maybe_multimagic_gv(pTHX_ GV *gv, const char *name, const svtype sv_type) | |
2308 | { | |
2309 | PERL_ARGS_ASSERT_MAYBE_MULTIMAGIC_GV; | |
2310 | ||
2311 | if (sv_type == SVt_PVHV || sv_type == SVt_PVGV) { | |
2312 | if (*name == '!') | |
7c719134 | 2313 | require_tie_mod_s(gv, '!', "Errno", 1); |
070dc475 | 2314 | else if (*name == '-' || *name == '+') |
7c719134 | 2315 | require_tie_mod_s(gv, *name, "Tie::Hash::NamedCapture", 0); |
a678626e A |
2316 | } else if (sv_type == SVt_PV) { |
2317 | if (*name == '*' || *name == '#') { | |
dcb414ac JK |
2318 | /* diag_listed_as: $* is no longer supported as of Perl 5.30 */ |
2319 | Perl_croak(aTHX_ "$%c is no longer supported as of Perl 5.30", *name); | |
a678626e | 2320 | } |
070dc475 BF |
2321 | } |
2322 | if (sv_type==SVt_PV || sv_type==SVt_PVGV) { | |
2323 | switch (*name) { | |
070dc475 BF |
2324 | #ifdef PERL_SAWAMPERSAND |
2325 | case '`': | |
2326 | PL_sawampersand |= SAWAMPERSAND_LEFT; | |
2327 | (void)GvSVn(gv); | |
2328 | break; | |
2329 | case '&': | |
2330 | PL_sawampersand |= SAWAMPERSAND_MIDDLE; | |
2331 | (void)GvSVn(gv); | |
2332 | break; | |
2333 | case '\'': | |
2334 | PL_sawampersand |= SAWAMPERSAND_RIGHT; | |
2335 | (void)GvSVn(gv); | |
2336 | break; | |
2337 | #endif | |
2338 | } | |
2339 | } | |
2340 | } | |
2341 | ||
71c35c05 BF |
2342 | GV * |
2343 | Perl_gv_fetchpvn_flags(pTHX_ const char *nambeg, STRLEN full_len, I32 flags, | |
2344 | const svtype sv_type) | |
2345 | { | |
71c35c05 BF |
2346 | const char *name = nambeg; |
2347 | GV *gv = NULL; | |
2348 | GV**gvp; | |
2349 | STRLEN len; | |
2350 | HV *stash = NULL; | |
2351 | const I32 no_init = flags & (GV_NOADD_NOINIT | GV_NOINIT); | |
2352 | const I32 no_expand = flags & GV_NOEXPAND; | |
2353 | const I32 add = flags & ~GV_NOADD_MASK; | |
2354 | const U32 is_utf8 = flags & SVf_UTF8; | |
930867a8 | 2355 | bool addmg = cBOOL(flags & GV_ADDMG); |
71c35c05 BF |
2356 | const char *const name_end = nambeg + full_len; |
2357 | U32 faking_it; | |
2358 | ||
2359 | PERL_ARGS_ASSERT_GV_FETCHPVN_FLAGS; | |
2360 | ||
2361 | /* If we have GV_NOTQUAL, the caller promised that | |
2362 | * there is no stash, so we can skip the check. | |
2363 | * Similarly if full_len is 0, since then we're | |
2364 | * dealing with something like *{""} or ""->foo() | |
2365 | */ | |
2366 | if ((flags & GV_NOTQUAL) || !full_len) { | |
2367 | len = full_len; | |
2368 | } | |
2369 | else if (parse_gv_stash_name(&stash, &gv, &name, &len, nambeg, full_len, is_utf8, add)) { | |
2370 | if (name == name_end) return gv; | |
2371 | } | |
2372 | else { | |
2373 | return NULL; | |
2374 | } | |
2375 | ||
2376 | if (!stash && !find_default_stash(&stash, name, len, is_utf8, add, sv_type)) { | |
2377 | return NULL; | |
2378 | } | |
2379 | ||
2380 | /* By this point we should have a stash and a name */ | |
c161da64 | 2381 | gvp = (GV**)hv_fetch(stash,name,is_utf8 ? -(I32)len : (I32)len,add); |
71c35c05 BF |
2382 | if (!gvp || *gvp == (const GV *)&PL_sv_undef) { |
2383 | if (addmg) gv = (GV *)newSV(0); | |
2384 | else return NULL; | |
2385 | } | |
2386 | else gv = *gvp, addmg = 0; | |
2387 | /* From this point on, addmg means gv has not been inserted in the | |
2388 | symtab yet. */ | |
2389 | ||
2390 | if (SvTYPE(gv) == SVt_PVGV) { | |
c002ae9a BF |
2391 | /* The GV already exists, so return it, but check if we need to do |
2392 | * anything else with it before that. | |
2393 | */ | |
71c35c05 | 2394 | if (add) { |
c002ae9a BF |
2395 | /* This is the heuristic that handles if a variable triggers the |
2396 | * 'used only once' warning. If there's already a GV in the stash | |
2397 | * with this name, then we assume that the variable has been used | |
2398 | * before and turn its MULTI flag on. | |
2399 | * It's a heuristic because it can easily be "tricked", like with | |
2400 | * BEGIN { $a = 1; $::{foo} = *a }; () = $foo | |
2401 | * not warning about $main::foo being used just once | |
2402 | */ | |
71c35c05 BF |
2403 | GvMULTI_on(gv); |
2404 | gv_init_svtype(gv, sv_type); | |
2405 | /* You reach this path once the typeglob has already been created, | |
2406 | either by the same or a different sigil. If this path didn't | |
2407 | exist, then (say) referencing $! first, and %! second would | |
2408 | mean that %! was not handled correctly. */ | |
2409 | if (len == 1 && stash == PL_defstash) { | |
070dc475 | 2410 | maybe_multimagic_gv(gv, name, sv_type); |
71c35c05 | 2411 | } |
b59bf0b2 KW |
2412 | else if (sv_type == SVt_PVAV |
2413 | && memEQs(name, len, "ISA") | |
71c35c05 BF |
2414 | && (!GvAV(gv) || !SvSMAGICAL(GvAV(gv)))) |
2415 | gv_magicalize_isa(gv); | |
2416 | } | |
2417 | return gv; | |
2418 | } else if (no_init) { | |
2419 | assert(!addmg); | |
2420 | return gv; | |
c002ae9a BF |
2421 | } |
2422 | /* If GV_NOEXPAND is true and what we got off the stash is a ref, | |
2423 | * don't expand it to a glob. This is an optimization so that things | |
2424 | * copying constants over, like Exporter, don't have to be rewritten | |
2425 | * to take into account that you can store more than just globs in | |
2426 | * stashes. | |
2427 | */ | |
2428 | else if (no_expand && SvROK(gv)) { | |
71c35c05 BF |
2429 | assert(!addmg); |
2430 | return gv; | |
2431 | } | |
2432 | ||
2433 | /* Adding a new symbol. | |
2434 | Unless of course there was already something non-GV here, in which case | |
2435 | we want to behave as if there was always a GV here, containing some sort | |
2436 | of subroutine. | |
2437 | Otherwise we run the risk of creating things like GvIO, which can cause | |
2438 | subtle bugs. eg the one that tripped up SQL::Translator */ | |
2439 | ||
2440 | faking_it = SvOK(gv); | |
2441 | ||
2442 | if (add & GV_ADDWARN) | |
2443 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), | |
147e3846 | 2444 | "Had to create %" UTF8f " unexpectedly", |
71c35c05 BF |
2445 | UTF8fARG(is_utf8, name_end-nambeg, nambeg)); |
2446 | gv_init_pvn(gv, stash, name, len, (add & GV_ADDMULTI)|is_utf8); | |
2447 | ||
7a207065 KW |
2448 | if ( full_len != 0 |
2449 | && isIDFIRST_lazy_if_safe(name, name + full_len, is_utf8) | |
2450 | && !ckWARN(WARN_ONCE) ) | |
2451 | { | |
71c35c05 | 2452 | GvMULTI_on(gv) ; |
7a207065 | 2453 | } |
71c35c05 BF |
2454 | |
2455 | /* set up magic where warranted */ | |
1321bbe3 | 2456 | if ( gv_magicalize(gv, stash, name, len, sv_type) ) { |
930867a8 | 2457 | /* See 23496c6 */ |
1321bbe3 FC |
2458 | if (addmg) { |
2459 | /* gv_magicalize magicalised this gv, so we want it | |
930867a8 | 2460 | * stored in the symtab. |
1321bbe3 FC |
2461 | * Effectively the caller is asking, ‘Does this gv exist?’ |
2462 | * And we respond, ‘Er, *now* it does!’ | |
930867a8 BF |
2463 | */ |
2464 | (void)hv_store(stash,name,len,(SV *)gv,0); | |
1321bbe3 FC |
2465 | } |
2466 | } | |
2467 | else if (addmg) { | |
2468 | /* The temporary GV created above */ | |
930867a8 BF |
2469 | SvREFCNT_dec_NN(gv); |
2470 | gv = NULL; | |
930867a8 | 2471 | } |
71c35c05 | 2472 | |
e6066781 | 2473 | if (gv) gv_init_svtype(gv, faking_it ? SVt_PVCV : sv_type); |
93a17b20 | 2474 | return gv; |
79072805 LW |
2475 | } |
2476 | ||
2477 | void | |
35a4481c | 2478 | Perl_gv_fullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2479 | { |
ed60a868 | 2480 | const char *name; |
35a4481c | 2481 | const HV * const hv = GvSTASH(gv); |
7918f24d NC |
2482 | |
2483 | PERL_ARGS_ASSERT_GV_FULLNAME4; | |
2484 | ||
666ea192 | 2485 | sv_setpv(sv, prefix ? prefix : ""); |
a0288114 | 2486 | |
52a6327b | 2487 | if (hv && (name = HvNAME(hv))) { |
ed60a868 | 2488 | const STRLEN len = HvNAMELEN(hv); |
61e2287f | 2489 | if (keepmain || ! memBEGINs(name, len, "main")) { |
ed60a868 | 2490 | sv_catpvn_flags(sv,name,len,HvNAMEUTF8(hv)?SV_CATUTF8:SV_CATBYTES); |
396482e1 | 2491 | sv_catpvs(sv,"::"); |
ed60a868 | 2492 | } |
43693395 | 2493 | } |
ed60a868 | 2494 | else sv_catpvs(sv,"__ANON__::"); |
04f3bf56 | 2495 | sv_catsv(sv,sv_2mortal(newSVhek(GvNAME_HEK(gv)))); |
43693395 GS |
2496 | } |
2497 | ||
2498 | void | |
35a4481c | 2499 | Perl_gv_efullname4(pTHX_ SV *sv, const GV *gv, const char *prefix, bool keepmain) |
43693395 | 2500 | { |
099be4f1 | 2501 | const GV * const egv = GvEGVx(gv); |
7918f24d NC |
2502 | |
2503 | PERL_ARGS_ASSERT_GV_EFULLNAME4; | |
2504 | ||
46c461b5 | 2505 | gv_fullname4(sv, egv ? egv : gv, prefix, keepmain); |
43693395 GS |
2506 | } |
2507 | ||
39a65960 DM |
2508 | |
2509 | /* recursively scan a stash and any nested stashes looking for entries | |
2510 | * that need the "only used once" warning raised | |
2511 | */ | |
2512 | ||
79072805 | 2513 | void |
51da40ed | 2514 | Perl_gv_check(pTHX_ HV *stash) |
79072805 | 2515 | { |
eb578fdb | 2516 | I32 i; |
463ee0b2 | 2517 | |
7918f24d NC |
2518 | PERL_ARGS_ASSERT_GV_CHECK; |
2519 | ||
9e5cda6b | 2520 | if (!SvOOK(stash)) |
8990e307 | 2521 | return; |
90754377 | 2522 | |
9e5cda6b | 2523 | assert(HvARRAY(stash)); |
90754377 | 2524 | |
a0d0e21e | 2525 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
e1ec3a88 | 2526 | const HE *entry; |
90754377 | 2527 | /* mark stash is being scanned, to avoid recursing */ |
339441ef | 2528 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_SCAN_STASH; |
dc437b57 | 2529 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
eb578fdb | 2530 | GV *gv; |
b7787f18 | 2531 | HV *hv; |
e7acdfe9 DM |
2532 | STRLEN keylen = HeKLEN(entry); |
2533 | const char * const key = HeKEY(entry); | |
2534 | ||
2535 | if (keylen >= 2 && key[keylen-2] == ':' && key[keylen-1] == ':' && | |
159b6efe | 2536 | (gv = MUTABLE_GV(HeVAL(entry))) && isGV(gv) && (hv = GvHV(gv))) |
a0d0e21e | 2537 | { |
90754377 DM |
2538 | if (hv != PL_defstash && hv != stash |
2539 | && !(SvOOK(hv) | |
2540 | && (HvAUX(hv)->xhv_aux_flags & HvAUXf_SCAN_STASH)) | |
2541 | ) | |
a0d0e21e LW |
2542 | gv_check(hv); /* nested package */ |
2543 | } | |
7a207065 KW |
2544 | else if ( HeKLEN(entry) != 0 |
2545 | && *HeKEY(entry) != '_' | |
2546 | && isIDFIRST_lazy_if_safe(HeKEY(entry), | |
2547 | HeKEY(entry) + HeKLEN(entry), | |
2548 | HeUTF8(entry)) ) | |
2549 | { | |
e1ec3a88 | 2550 | const char *file; |
159b6efe | 2551 | gv = MUTABLE_GV(HeVAL(entry)); |
55d729e4 | 2552 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 | 2553 | continue; |
1d7c1841 | 2554 | file = GvFILE(gv); |
1d7c1841 | 2555 | CopLINE_set(PL_curcop, GvLINE(gv)); |
1dc74fdb FC |
2556 | #ifdef USE_ITHREADS |
2557 | CopFILE(PL_curcop) = (char *)file; /* set for warning */ | |
2558 | #else | |
2559 | CopFILEGV(PL_curcop) | |
2560 | = gv_fetchfile_flags(file, HEK_LEN(GvFILE_HEK(gv)), 0); | |
2561 | #endif | |
9014280d | 2562 | Perl_warner(aTHX_ packWARN(WARN_ONCE), |
147e3846 | 2563 | "Name \"%" HEKf "::%" HEKf |
d0c0e7dd FC |
2564 | "\" used only once: possible typo", |
2565 | HEKfARG(HvNAME_HEK(stash)), | |
2566 | HEKfARG(GvNAME_HEK(gv))); | |
463ee0b2 | 2567 | } |
79072805 | 2568 | } |
339441ef | 2569 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_SCAN_STASH; |
79072805 LW |
2570 | } |
2571 | } | |
2572 | ||
2573 | GV * | |
9cc50d5b | 2574 | Perl_newGVgen_flags(pTHX_ const char *pack, U32 flags) |
79072805 | 2575 | { |
9cc50d5b | 2576 | PERL_ARGS_ASSERT_NEWGVGEN_FLAGS; |
b17a0679 | 2577 | assert(!(flags & ~SVf_UTF8)); |
7918f24d | 2578 | |
147e3846 | 2579 | return gv_fetchpv(Perl_form(aTHX_ "%" UTF8f "::_GEN_%ld", |
b17a0679 | 2580 | UTF8fARG(flags, strlen(pack), pack), |
9cc50d5b BF |
2581 | (long)PL_gensym++), |
2582 | GV_ADD, SVt_PVGV); | |
79072805 LW |
2583 | } |
2584 | ||
2585 | /* hopefully this is only called on local symbol table entries */ | |
2586 | ||
2587 | GP* | |
864dbfa3 | 2588 | Perl_gp_ref(pTHX_ GP *gp) |
79072805 | 2589 | { |
1d7c1841 | 2590 | if (!gp) |
d4c19fe8 | 2591 | return NULL; |
79072805 | 2592 | gp->gp_refcnt++; |
44a8e56a | 2593 | if (gp->gp_cv) { |
2594 | if (gp->gp_cvgen) { | |
e1a479c5 BB |
2595 | /* If the GP they asked for a reference to contains |
2596 | a method cache entry, clear it first, so that we | |
2597 | don't infect them with our cached entry */ | |
e7881358 | 2598 | SvREFCNT_dec_NN(gp->gp_cv); |
601f1833 | 2599 | gp->gp_cv = NULL; |
44a8e56a | 2600 | gp->gp_cvgen = 0; |
2601 | } | |
44a8e56a | 2602 | } |
79072805 | 2603 | return gp; |
79072805 LW |
2604 | } |
2605 | ||
2606 | void | |
864dbfa3 | 2607 | Perl_gp_free(pTHX_ GV *gv) |
79072805 | 2608 | { |
79072805 | 2609 | GP* gp; |
b0d55c99 | 2610 | int attempts = 100; |
79072805 | 2611 | |
f7877b28 | 2612 | if (!gv || !isGV_with_GP(gv) || !(gp = GvGP(gv))) |
79072805 | 2613 | return; |
f248d071 | 2614 | if (gp->gp_refcnt == 0) { |
9b387841 NC |
2615 | Perl_ck_warner_d(aTHX_ packWARN(WARN_INTERNAL), |
2616 | "Attempt to free unreferenced glob pointers" | |
2617 | pTHX__FORMAT pTHX__VALUE); | |
79072805 LW |
2618 | return; |
2619 | } | |
4571f4a7 | 2620 | if (gp->gp_refcnt > 1) { |
bc81b34d | 2621 | borrowed: |
748a9306 LW |
2622 | if (gp->gp_egv == gv) |
2623 | gp->gp_egv = 0; | |
4571f4a7 | 2624 | gp->gp_refcnt--; |
c43ae56f | 2625 | GvGP_set(gv, NULL); |
79072805 | 2626 | return; |
748a9306 | 2627 | } |
79072805 | 2628 | |
b0d55c99 FC |
2629 | while (1) { |
2630 | /* Copy and null out all the glob slots, so destructors do not see | |
2631 | freed SVs. */ | |
2632 | HEK * const file_hek = gp->gp_file_hek; | |
2633 | SV * const sv = gp->gp_sv; | |
2634 | AV * const av = gp->gp_av; | |
2635 | HV * const hv = gp->gp_hv; | |
2636 | IO * const io = gp->gp_io; | |
2637 | CV * const cv = gp->gp_cv; | |
2638 | CV * const form = gp->gp_form; | |
2639 | ||
2640 | gp->gp_file_hek = NULL; | |
2641 | gp->gp_sv = NULL; | |
2642 | gp->gp_av = NULL; | |
2643 | gp->gp_hv = NULL; | |
2644 | gp->gp_io = NULL; | |
2645 | gp->gp_cv = NULL; | |
2646 | gp->gp_form = NULL; | |
2647 | ||
2648 | if (file_hek) | |
2649 | unshare_hek(file_hek); | |
2650 | ||
2651 | SvREFCNT_dec(sv); | |
2652 | SvREFCNT_dec(av); | |
2653 | /* FIXME - another reference loop GV -> symtab -> GV ? | |
2654 | Somehow gp->gp_hv can end up pointing at freed garbage. */ | |
2655 | if (hv && SvTYPE(hv) == SVt_PVHV) { | |
c2242065 | 2656 | const HEK *hvname_hek = HvNAME_HEK(hv); |
923ed580 FC |
2657 | if (PL_stashcache && hvname_hek) { |
2658 | DEBUG_o(Perl_deb(aTHX_ | |
147e3846 | 2659 | "gp_free clearing PL_stashcache for '%" HEKf "'\n", |
923ed580 | 2660 | HEKfARG(hvname_hek))); |
0ca9877d | 2661 | (void)hv_deletehek(PL_stashcache, hvname_hek, G_DISCARD); |
923ed580 | 2662 | } |
b0d55c99 FC |
2663 | SvREFCNT_dec(hv); |
2664 | } | |
96d7c888 FC |
2665 | if (io && SvREFCNT(io) == 1 && IoIFP(io) |
2666 | && (IoTYPE(io) == IoTYPE_WRONLY || | |
2667 | IoTYPE(io) == IoTYPE_RDWR || | |
2668 | IoTYPE(io) == IoTYPE_APPEND) | |
2669 | && ckWARN_d(WARN_IO) | |
2670 | && IoIFP(io) != PerlIO_stdin() | |
2671 | && IoIFP(io) != PerlIO_stdout() | |
2672 | && IoIFP(io) != PerlIO_stderr() | |
2673 | && !(IoFLAGS(io) & IOf_FAKE_DIRP)) | |
2674 | io_close(io, gv, FALSE, TRUE); | |
b0d55c99 FC |
2675 | SvREFCNT_dec(io); |
2676 | SvREFCNT_dec(cv); | |
2677 | SvREFCNT_dec(form); | |
2678 | ||
bc81b34d FC |
2679 | /* Possibly reallocated by a destructor */ |
2680 | gp = GvGP(gv); | |
2681 | ||
b0d55c99 FC |
2682 | if (!gp->gp_file_hek |
2683 | && !gp->gp_sv | |
2684 | && !gp->gp_av | |
2685 | && !gp->gp_hv | |
2686 | && !gp->gp_io | |
2687 | && !gp->gp_cv | |
2688 | && !gp->gp_form) break; | |
2689 | ||
2690 | if (--attempts == 0) { | |
2691 | Perl_die(aTHX_ | |
2692 | "panic: gp_free failed to free glob pointer - " | |
2693 | "something is repeatedly re-creating entries" | |
2694 | ); | |
2695 | } | |
13207a71 | 2696 | } |
748a9306 | 2697 | |
bc81b34d FC |
2698 | /* Possibly incremented by a destructor doing glob assignment */ |
2699 | if (gp->gp_refcnt > 1) goto borrowed; | |
79072805 | 2700 | Safefree(gp); |
c43ae56f | 2701 | GvGP_set(gv, NULL); |
79072805 LW |
2702 | } |
2703 | ||
d460ef45 NIS |
2704 | int |
2705 | Perl_magic_freeovrld(pTHX_ SV *sv, MAGIC *mg) | |
2706 | { | |
53c1dcc0 AL |
2707 | AMT * const amtp = (AMT*)mg->mg_ptr; |
2708 | PERL_UNUSED_ARG(sv); | |
dd374669 | 2709 | |
7918f24d NC |
2710 | PERL_ARGS_ASSERT_MAGIC_FREEOVRLD; |
2711 | ||
d460ef45 NIS |
2712 | if (amtp && AMT_AMAGIC(amtp)) { |
2713 | int i; | |
2714 | for (i = 1; i < NofAMmeth; i++) { | |
53c1dcc0 | 2715 | CV * const cv = amtp->table[i]; |
b37c2d43 | 2716 | if (cv) { |
e7881358 | 2717 | SvREFCNT_dec_NN(MUTABLE_SV(cv)); |
601f1833 | 2718 | amtp->table[i] = NULL; |
d460ef45 NIS |
2719 | } |
2720 | } | |
2721 | } | |
2722 | return 0; | |
2723 | } | |
2724 | ||
a0d0e21e | 2725 | /* Updates and caches the CV's */ |
c3a9a790 RGS |
2726 | /* Returns: |
2727 | * 1 on success and there is some overload | |
2728 | * 0 if there is no overload | |
2729 | * -1 if some error occurred and it couldn't croak | |
2730 | */ | |
a0d0e21e | 2731 | |
c3a9a790 | 2732 | int |
242f8760 | 2733 | Perl_Gv_AMupdate(pTHX_ HV *stash, bool destructing) |
a0d0e21e | 2734 | { |
ad64d0ec | 2735 | MAGIC* const mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
a6006777 | 2736 | AMT amt; |
9b439311 | 2737 | const struct mro_meta* stash_meta = HvMROMETA(stash); |
e1a479c5 | 2738 | U32 newgen; |
a0d0e21e | 2739 | |
7918f24d NC |
2740 | PERL_ARGS_ASSERT_GV_AMUPDATE; |
2741 | ||
9b439311 | 2742 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; |
14899595 NC |
2743 | if (mg) { |
2744 | const AMT * const amtp = (AMT*)mg->mg_ptr; | |
66978156 | 2745 | if (amtp->was_ok_sub == newgen) { |
8c34e50d | 2746 | return AMT_AMAGIC(amtp) ? 1 : 0; |
14899595 | 2747 | } |
ad64d0ec | 2748 | sv_unmagic(MUTABLE_SV(stash), PERL_MAGIC_overload_table); |
14899595 | 2749 | } |
a0d0e21e | 2750 | |
bfcb3514 | 2751 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME_get(stash)) ); |
a0d0e21e | 2752 | |
d460ef45 | 2753 | Zero(&amt,1,AMT); |
e1a479c5 | 2754 | amt.was_ok_sub = newgen; |
a6006777 | 2755 | amt.fallback = AMGfallNO; |
2756 | amt.flags = 0; | |
2757 | ||
a6006777 | 2758 | { |
8c34e50d FC |
2759 | int filled = 0; |
2760 | int i; | |
3d147ac2 DM |
2761 | bool deref_seen = 0; |
2762 | ||
a6006777 | 2763 | |
3866ea3b | 2764 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
a6006777 | 2765 | |
89ffc314 | 2766 | /* Try to find via inheritance. */ |
e6919483 | 2767 | GV *gv = gv_fetchmeth_pvn(stash, PL_AMG_names[0], 2, -1, 0); |
3866ea3b | 2768 | SV * const sv = gv ? GvSV(gv) : NULL; |
53c1dcc0 | 2769 | CV* cv; |
89ffc314 IZ |
2770 | |
2771 | if (!gv) | |
3866ea3b FC |
2772 | { |
2773 | if (!gv_fetchmeth_pvn(stash, "((", 2, -1, 0)) | |
8c34e50d | 2774 | goto no_table; |
3866ea3b FC |
2775 | } |
2776 | #ifdef PERL_DONT_CREATE_GVSV | |
2777 | else if (!sv) { | |
6f207bd3 | 2778 | NOOP; /* Equivalent to !SvTRUE and !SvOK */ |
3866ea3b FC |
2779 | } |
2780 | #endif | |
79c9643d JL |
2781 | else if (SvTRUE(sv)) |
2782 | /* don't need to set overloading here because fallback => 1 | |
2783 | * is the default setting for classes without overloading */ | |
89ffc314 | 2784 | amt.fallback=AMGfallYES; |
79c9643d JL |
2785 | else if (SvOK(sv)) { |
2786 | amt.fallback=AMGfallNEVER; | |
386a5489 | 2787 | filled = 1; |
386a5489 | 2788 | } |
79c9643d | 2789 | else { |
386a5489 | 2790 | filled = 1; |
386a5489 | 2791 | } |
a6006777 | 2792 | |
3d147ac2 | 2793 | assert(SvOOK(stash)); |
3d147ac2 | 2794 | /* initially assume the worst */ |
339441ef | 2795 | HvAUX(stash)->xhv_aux_flags &= ~HvAUXf_NO_DEREF; |
3d147ac2 | 2796 | |
8c34e50d | 2797 | for (i = 1; i < NofAMmeth; i++) { |
6136c704 | 2798 | const char * const cooky = PL_AMG_names[i]; |
32251b26 | 2799 | /* Human-readable form, for debugging: */ |
8c34e50d | 2800 | const char * const cp = AMG_id2name(i); |
d279ab82 | 2801 | const STRLEN l = PL_AMG_namelens[i]; |
89ffc314 | 2802 | |
a0288114 | 2803 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of \"%s\" in package \"%.256s\"\n", |
bfcb3514 | 2804 | cp, HvNAME_get(stash)) ); |
611c1e95 IZ |
2805 | /* don't fill the cache while looking up! |
2806 | Creation of inheritance stubs in intermediate packages may | |
2807 | conflict with the logic of runtime method substitution. | |
2808 | Indeed, for inheritance A -> B -> C, if C overloads "+0", | |
2809 | then we could have created stubs for "(+0" in A and C too. | |
2810 | But if B overloads "bool", we may want to use it for | |
2811 | numifying instead of C's "+0". */ | |
8c34e50d | 2812 | gv = Perl_gv_fetchmeth_pvn(aTHX_ stash, cooky, l, -1, 0); |
46fc3d4c | 2813 | cv = 0; |
c3ad4e54 | 2814 | if (gv && (cv = GvCV(gv)) && CvHASGV(cv)) { |
79656330 | 2815 | const HEK * const gvhek = CvGvNAME_HEK(cv); |
c3ad4e54 FC |
2816 | const HEK * const stashek = |
2817 | HvNAME_HEK(CvNAMED(cv) ? CvSTASH(cv) : GvSTASH(CvGV(cv))); | |
b59bf0b2 KW |
2818 | if (memEQs(HEK_KEY(gvhek), HEK_LEN(gvhek), "nil") |
2819 | && stashek | |
2820 | && memEQs(HEK_KEY(stashek), HEK_LEN(stashek), "overload")) { | |
611c1e95 IZ |
2821 | /* This is a hack to support autoloading..., while |
2822 | knowing *which* methods were declared as overloaded. */ | |
44a8e56a | 2823 | /* GvSV contains the name of the method. */ |
6136c704 | 2824 | GV *ngv = NULL; |
c69033f2 | 2825 | SV *gvsv = GvSV(gv); |
a0288114 | 2826 | |
147e3846 | 2827 | DEBUG_o( Perl_deb(aTHX_ "Resolving method \"%" SVf256\ |
a0288114 | 2828 | "\" for overloaded \"%s\" in package \"%.256s\"\n", |
f0e9f182 | 2829 | (void*)GvSV(gv), cp, HvNAME(stash)) ); |
c69033f2 | 2830 | if (!gvsv || !SvPOK(gvsv) |
7f415459 | 2831 | || !(ngv = gv_fetchmethod_sv_flags(stash, gvsv, 0))) |
dc848c6f | 2832 | { |
a0288114 | 2833 | /* Can be an import stub (created by "can"). */ |
242f8760 | 2834 | if (destructing) { |
c3a9a790 | 2835 | return -1; |
242f8760 RGS |
2836 | } |
2837 | else { | |
d66cca07 BF |
2838 | const SV * const name = (gvsv && SvPOK(gvsv)) |
2839 | ? gvsv | |
2840 | : newSVpvs_flags("???", SVs_TEMP); | |
dcbac5bb | 2841 | /* diag_listed_as: Can't resolve method "%s" overloading "%s" in package "%s" */ |
147e3846 | 2842 | Perl_croak(aTHX_ "%s method \"%" SVf256 |
d66cca07 | 2843 | "\" overloading \"%s\" "\ |
147e3846 | 2844 | "in package \"%" HEKf256 "\"", |
242f8760 RGS |
2845 | (GvCVGEN(gv) ? "Stub found while resolving" |
2846 | : "Can't resolve"), | |
d66cca07 | 2847 | SVfARG(name), cp, |
d0c0e7dd | 2848 | HEKfARG( |
d66cca07 | 2849 | HvNAME_HEK(stash) |
d0c0e7dd | 2850 | )); |
242f8760 | 2851 | } |
44a8e56a | 2852 | } |
dc848c6f | 2853 | cv = GvCV(gv = ngv); |
44a8e56a | 2854 | } |
b464bac0 | 2855 | DEBUG_o( Perl_deb(aTHX_ "Overloading \"%s\" in package \"%.256s\" via \"%.256s::%.256s\"\n", |
bfcb3514 | 2856 | cp, HvNAME_get(stash), HvNAME_get(GvSTASH(CvGV(cv))), |
44a8e56a | 2857 | GvNAME(CvGV(cv))) ); |
2858 | filled = 1; | |
611c1e95 | 2859 | } else if (gv) { /* Autoloaded... */ |
ea726b52 | 2860 | cv = MUTABLE_CV(gv); |
611c1e95 | 2861 | filled = 1; |
44a8e56a | 2862 | } |
ea726b52 | 2863 | amt.table[i]=MUTABLE_CV(SvREFCNT_inc_simple(cv)); |
3d147ac2 DM |
2864 | |
2865 | if (gv) { | |
2866 | switch (i) { | |
2867 | case to_sv_amg: | |
2868 | case to_av_amg: | |
2869 | case to_hv_amg: | |
2870 | case to_gv_amg: | |
2871 | case to_cv_amg: | |
2872 | case nomethod_amg: | |
2873 | deref_seen = 1; | |
2874 | break; | |
2875 | } | |
2876 | } | |
a0d0e21e | 2877 | } |
3d147ac2 | 2878 | if (!deref_seen) |
45479970 DM |
2879 | /* none of @{} etc overloaded; we can do $obj->[N] quicker. |
2880 | * NB - aux var invalid here, HvARRAY() could have been | |
2881 | * reallocated since it was assigned to */ | |
2882 | HvAUX(stash)->xhv_aux_flags |= HvAUXf_NO_DEREF; | |
3d147ac2 | 2883 | |
a0d0e21e | 2884 | if (filled) { |
a6006777 | 2885 | AMT_AMAGIC_on(&amt); |
ad64d0ec | 2886 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2887 | (char*)&amt, sizeof(AMT)); |
8c34e50d | 2888 | return TRUE; |
a0d0e21e LW |
2889 | } |
2890 | } | |
a6006777 | 2891 | /* Here we have no table: */ |
8c34e50d | 2892 | no_table: |
a6006777 | 2893 | AMT_AMAGIC_off(&amt); |
ad64d0ec | 2894 | sv_magic(MUTABLE_SV(stash), 0, PERL_MAGIC_overload_table, |
14befaf4 | 2895 | (char*)&amt, sizeof(AMTS)); |
c3a9a790 | 2896 | return 0; |
a0d0e21e LW |
2897 | } |
2898 | ||
32251b26 IZ |
2899 | |
2900 | CV* | |
2901 | Perl_gv_handler(pTHX_ HV *stash, I32 id) | |
2902 | { | |
3f8f4626 | 2903 | MAGIC *mg; |
32251b26 | 2904 | AMT *amtp; |
e1a479c5 | 2905 | U32 newgen; |
9b439311 | 2906 | struct mro_meta* stash_meta; |
32251b26 | 2907 | |
bfcb3514 | 2908 | if (!stash || !HvNAME_get(stash)) |
601f1833 | 2909 | return NULL; |
e1a479c5 | 2910 | |
9b439311 BB |
2911 | stash_meta = HvMROMETA(stash); |
2912 | newgen = PL_sub_generation + stash_meta->pkg_gen + stash_meta->cache_gen; | |
e1a479c5 | 2913 | |
ad64d0ec | 2914 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 IZ |
2915 | if (!mg) { |
2916 | do_update: | |
8c34e50d | 2917 | if (Gv_AMupdate(stash, 0) == -1) |
242f8760 | 2918 | return NULL; |
ad64d0ec | 2919 | mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table); |
32251b26 | 2920 | } |
a9fd4e40 | 2921 | assert(mg); |
32251b26 | 2922 | amtp = (AMT*)mg->mg_ptr; |
66978156 | 2923 | if ( amtp->was_ok_sub != newgen ) |
32251b26 | 2924 | goto do_update; |
3ad83ce7 | 2925 | if (AMT_AMAGIC(amtp)) { |
b7787f18 | 2926 | CV * const ret = amtp->table[id]; |
3ad83ce7 AMS |
2927 | if (ret && isGV(ret)) { /* Autoloading stab */ |
2928 | /* Passing it through may have resulted in a warning | |
2929 | "Inherited AUTOLOAD for a non-method deprecated", since | |
2930 | our caller is going through a function call, not a method call. | |
2931 | So return the CV for AUTOLOAD, setting $AUTOLOAD. */ | |
890ce7af | 2932 | GV * const gv = gv_fetchmethod(stash, PL_AMG_names[id]); |
3ad83ce7 AMS |
2933 | |
2934 | if (gv && GvCV(gv)) | |
2935 | return GvCV(gv); | |
2936 | } | |
2937 | return ret; | |
2938 | } | |
a0288114 | 2939 | |
601f1833 | 2940 | return NULL; |
32251b26 IZ |
2941 | } |
2942 | ||
2943 | ||
6f1401dc DM |
2944 | /* Implement tryAMAGICun_MG macro. |
2945 | Do get magic, then see if the stack arg is overloaded and if so call it. | |
2946 | Flags: | |
6f1401dc DM |
2947 | AMGf_numeric apply sv_2num to the stack arg. |
2948 | */ | |
2949 | ||
2950 | bool | |
2951 | Perl_try_amagic_un(pTHX_ int method, int flags) { | |
6f1401dc DM |
2952 | dSP; |
2953 | SV* tmpsv; | |
2954 | SV* const arg = TOPs; | |
2955 | ||
2956 | SvGETMAGIC(arg); | |
2957 | ||
9f8bf298 | 2958 | if (SvAMAGIC(arg) && (tmpsv = amagic_call(arg, &PL_sv_undef, method, |
636ac8fc FC |
2959 | AMGf_noright | AMGf_unary |
2960 | | (flags & AMGf_numarg)))) | |
2961 | { | |
13874762 DM |
2962 | /* where the op is of the form: |
2963 | * $lex = $x op $y (where the assign is optimised away) | |
2964 | * then assign the returned value to targ and return that; | |
2965 | * otherwise return the value directly | |
2966 | */ | |
2967 | if ( (PL_opargs[PL_op->op_type] & OA_TARGLEX) | |
2968 | && (PL_op->op_private & OPpTARGET_MY)) | |
2969 | { | |
2970 | dTARGET; | |
2971 | sv_setsv(TARG, tmpsv); | |
2972 | SETTARG; | |
2973 | } | |
2974 | else | |
2975 | SETs(tmpsv); | |
2976 | ||
6f1401dc DM |
2977 | PUTBACK; |
2978 | return TRUE; | |
2979 | } | |
2980 | ||
2981 | if ((flags & AMGf_numeric) && SvROK(arg)) | |
2982 | *sp = sv_2num(arg); | |
2983 | return FALSE; | |
2984 | } | |
2985 | ||
2986 | ||
2987 | /* Implement tryAMAGICbin_MG macro. | |
2988 | Do get magic, then see if the two stack args are overloaded and if so | |
2989 | call it. | |
2990 | Flags: | |
6f1401dc DM |
2991 | AMGf_assign op may be called as mutator (eg +=) |
2992 | AMGf_numeric apply sv_2num to the stack arg. | |
2993 | */ | |
2994 | ||
2995 | bool | |
2996 | Perl_try_amagic_bin(pTHX_ int method, int flags) { | |
6f1401dc DM |
2997 | dSP; |
2998 | SV* const left = TOPm1s; | |
2999 | SV* const right = TOPs; | |
3000 | ||
3001 | SvGETMAGIC(left); | |
3002 | if (left != right) | |
3003 | SvGETMAGIC(right); | |
3004 | ||
3005 | if (SvAMAGIC(left) || SvAMAGIC(right)) { | |
72876cce DM |
3006 | SV * tmpsv; |
3007 | /* STACKED implies mutator variant, e.g. $x += 1 */ | |
3008 | bool mutator = (flags & AMGf_assign) && (PL_op->op_flags & OPf_STACKED); | |
3009 | ||
3010 | tmpsv = amagic_call(left, right, method, | |
3011 | (mutator ? AMGf_assign: 0) | |
636ac8fc | 3012 | | (flags & AMGf_numarg)); |
6f1401dc | 3013 | if (tmpsv) { |
13874762 DM |
3014 | (void)POPs; |
3015 | /* where the op is one of the two forms: | |
3016 | * $x op= $y | |
3017 | * $lex = $x op $y (where the assign is optimised away) | |
3018 | * then assign the returned value to targ and return that; | |
3019 | * otherwise return the value directly | |
3020 | */ | |
3021 | if ( mutator | |
3022 | || ( (PL_opargs[PL_op->op_type] & OA_TARGLEX) | |
3023 | && (PL_op->op_private & OPpTARGET_MY))) | |
3024 | { | |
3025 | dTARG; | |
3026 | TARG = mutator ? *SP : PAD_SV(PL_op->op_targ); | |
3027 | sv_setsv(TARG, tmpsv); | |
3028 | SETTARG; | |
3029 | } | |
3030 | else | |
3031 | SETs(tmpsv); | |
3032 | ||
6f1401dc DM |
3033 | PUTBACK; |
3034 | return TRUE; | |
3035 | } | |
3036 | } | |
13874762 | 3037 | |
75ea7a12 FC |
3038 | if(left==right && SvGMAGICAL(left)) { |
3039 | SV * const left = sv_newmortal(); | |
3040 | *(sp-1) = left; | |
3041 | /* Print the uninitialized warning now, so it includes the vari- | |
3042 | able name. */ | |
3043 | if (!SvOK(right)) { | |
3044 | if (ckWARN(WARN_UNINITIALIZED)) report_uninit(right); | |
3045 | sv_setsv_flags(left, &PL_sv_no, 0); | |
3046 | } | |
3047 | else sv_setsv_flags(left, right, 0); | |
3048 | SvGETMAGIC(right); | |
3049 | } | |
6f1401dc | 3050 | if (flags & AMGf_numeric) { |
75ea7a12 FC |
3051 | if (SvROK(TOPm1s)) |
3052 | *(sp-1) = sv_2num(TOPm1s); | |
6f1401dc DM |
3053 | if (SvROK(right)) |
3054 | *sp = sv_2num(right); | |
3055 | } | |
3056 | return FALSE; | |
3057 | } | |
3058 | ||
25a9ffce NC |
3059 | SV * |
3060 | Perl_amagic_deref_call(pTHX_ SV *ref, int method) { | |
3061 | SV *tmpsv = NULL; | |
3d147ac2 | 3062 | HV *stash; |
25a9ffce NC |
3063 | |
3064 | PERL_ARGS_ASSERT_AMAGIC_DEREF_CALL; | |
3065 | ||
3d147ac2 DM |
3066 | if (!SvAMAGIC(ref)) |
3067 | return ref; | |
3068 | /* return quickly if none of the deref ops are overloaded */ | |
3069 | stash = SvSTASH(SvRV(ref)); | |
3070 | assert(SvOOK(stash)); | |
3071 | if (HvAUX(stash)->xhv_aux_flags & HvAUXf_NO_DEREF) | |
3072 | return ref; | |
3073 | ||
3074 | while ((tmpsv = amagic_call(ref, &PL_sv_undef, method, | |
25a9ffce NC |
3075 | AMGf_noright | AMGf_unary))) { |
3076 | if (!SvROK(tmpsv)) | |
3077 | Perl_croak(aTHX_ "Overloaded dereference did not return a reference"); | |
3078 | if (tmpsv == ref || SvRV(tmpsv) == SvRV(ref)) { | |
3079 | /* Bail out if it returns us the same reference. */ | |
3080 | return tmpsv; | |
3081 | } | |
3082 | ref = tmpsv; | |
3d147ac2 DM |
3083 | if (!SvAMAGIC(ref)) |
3084 | break; | |
25a9ffce NC |
3085 | } |
3086 | return tmpsv ? tmpsv : ref; | |
3087 | } | |
6f1401dc | 3088 | |
8d569291 FC |
3089 | bool |
3090 | Perl_amagic_is_enabled(pTHX_ int method) | |
3091 | { | |
3092 | SV *lex_mask = cop_hints_fetch_pvs(PL_curcop, "overloading", 0); | |
3093 | ||
3094 | assert(PL_curcop->cop_hints & HINT_NO_AMAGIC); | |
3095 | ||
3096 | if ( !lex_mask || !SvOK(lex_mask) ) | |
3097 | /* overloading lexically disabled */ | |
3098 | return FALSE; | |
3099 | else if ( lex_mask && SvPOK(lex_mask) ) { | |
3100 | /* we have an entry in the hints hash, check if method has been | |
3101 | * masked by overloading.pm */ | |
3102 | STRLEN len; | |
3103 | const int offset = method / 8; | |
3104 | const int bit = method % 8; | |
3105 | char *pv = SvPV(lex_mask, len); | |
3106 | ||
3107 | /* Bit set, so this overloading operator is disabled */ | |
3108 | if ( (STRLEN)offset < len && pv[offset] & ( 1 << bit ) ) | |
3109 | return FALSE; | |
3110 | } | |
3111 | return TRUE; | |
3112 | } | |
3113 | ||
a0d0e21e | 3114 | SV* |
864dbfa3 | 3115 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
a0d0e21e | 3116 | { |
27da23d5 | 3117 | dVAR; |
b267980d | 3118 | MAGIC *mg; |
9c5ffd7c | 3119 | CV *cv=NULL; |
a0d0e21e | 3120 | CV **cvp=NULL, **ocvp=NULL; |
9c5ffd7c | 3121 | AMT *amtp=NULL, *oamtp=NULL; |
b464bac0 AL |
3122 | int off = 0, off1, lr = 0, notfound = 0; |
3123 | int postpr = 0, force_cpy = 0; | |
3124 | int assign = AMGf_assign & flags; | |
3125 | const int assignshift = assign ? 1 : 0; | |
bf5522a1 | 3126 | int use_default_op = 0; |
67288365 | 3127 | int force_scalar = 0; |
497b47a8 JH |
3128 | #ifdef DEBUGGING |
3129 | int fl=0; | |
497b47a8 | 3130 | #endif |
25716404 | 3131 | HV* stash=NULL; |
7918f24d NC |
3132 | |
3133 | PERL_ARGS_ASSERT_AMAGIC_CALL; | |
3134 | ||
e46c382e | 3135 | if ( PL_curcop->cop_hints & HINT_NO_AMAGIC ) { |
8d569291 | 3136 | if (!amagic_is_enabled(method)) return NULL; |
e46c382e YK |
3137 | } |
3138 | ||
a0d0e21e | 3139 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
0a2c84ab | 3140 | && (stash = SvSTASH(SvRV(left))) && Gv_AMG(stash) |
ad64d0ec | 3141 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 3142 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 3143 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 3144 | : NULL)) |
b267980d | 3145 | && ((cv = cvp[off=method+assignshift]) |
748a9306 LW |
3146 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
3147 | * usual method */ | |
497b47a8 JH |
3148 | ( |
3149 | #ifdef DEBUGGING | |
3150 | fl = 1, | |
a0288114 | 3151 | #endif |
497b47a8 | 3152 | cv = cvp[off=method])))) { |
a0d0e21e LW |
3153 | lr = -1; /* Call method for left argument */ |
3154 | } else { | |
3155 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
3156 | int logic; | |
3157 | ||
3158 | /* look for substituted methods */ | |
ee239bfe | 3159 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e LW |
3160 | switch (method) { |
3161 | case inc_amg: | |
ee239bfe IZ |
3162 | force_cpy = 1; |
3163 | if ((cv = cvp[off=add_ass_amg]) | |
3164 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { | |
3280af22 | 3165 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
3166 | } |
3167 | break; | |
3168 | case dec_amg: | |
ee239bfe IZ |
3169 | force_cpy = 1; |
3170 | if ((cv = cvp[off = subtr_ass_amg]) | |
3171 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { | |
3280af22 | 3172 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e LW |
3173 | } |
3174 | break; | |
3175 | case bool__amg: | |
3176 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
3177 | break; | |
3178 | case numer_amg: | |
3179 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
3180 | break; | |
3181 | case string_amg: | |
3182 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
3183 | break; | |
b7787f18 AL |
3184 | case not_amg: |
3185 | (void)((cv = cvp[off=bool__amg]) | |
3186 | || (cv = cvp[off=numer_amg]) | |
3187 | || (cv = cvp[off=string_amg])); | |
2ab54efd MB |
3188 | if (cv) |
3189 | postpr = 1; | |
b7787f18 | 3190 | break; |
748a9306 LW |
3191 | case copy_amg: |
3192 | { | |
76e3520e GS |
3193 | /* |
3194 | * SV* ref causes confusion with the interpreter variable of | |
3195 | * the same name | |
3196 | */ | |
890ce7af | 3197 | SV* const tmpRef=SvRV(left); |
76e3520e | 3198 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e | 3199 | /* |
3200 | * Just to be extra cautious. Maybe in some | |
3201 | * additional cases sv_setsv is safe, too. | |
3202 | */ | |
890ce7af | 3203 | SV* const newref = newSVsv(tmpRef); |
748a9306 | 3204 | SvOBJECT_on(newref); |
a1cd65be FC |
3205 | /* No need to do SvAMAGIC_on here, as SvAMAGIC macros |
3206 | delegate to the stash. */ | |
85fbaab2 | 3207 | SvSTASH_set(newref, MUTABLE_HV(SvREFCNT_inc(SvSTASH(tmpRef)))); |
748a9306 LW |
3208 | return newref; |
3209 | } | |
3210 | } | |
3211 | break; | |
a0d0e21e | 3212 | case abs_amg: |
b267980d | 3213 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 3214 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
725c44f9 | 3215 | SV* const nullsv=&PL_sv_zero; |
a0d0e21e | 3216 | if (off1==lt_amg) { |
890ce7af | 3217 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e | 3218 | lt_amg,AMGf_noright); |
f4c975aa | 3219 | logic = SvTRUE_NN(lessp); |
a0d0e21e | 3220 | } else { |
890ce7af | 3221 | SV* const lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
3222 | ncmp_amg,AMGf_noright); |
3223 | logic = (SvNV(lessp) < 0); | |
3224 | } | |
3225 | if (logic) { | |
3226 | if (off==subtr_amg) { | |
3227 | right = left; | |
748a9306 | 3228 | left = nullsv; |
a0d0e21e LW |
3229 | lr = 1; |
3230 | } | |
3231 | } else { | |
3232 | return left; | |
3233 | } | |
3234 | } | |
3235 | break; | |
3236 | case neg_amg: | |
155aba94 | 3237 | if ((cv = cvp[off=subtr_amg])) { |
a0d0e21e | 3238 | right = left; |
725c44f9 | 3239 | left = &PL_sv_zero; |
a0d0e21e LW |
3240 | lr = 1; |
3241 | } | |
3242 | break; | |
f216259d | 3243 | case int_amg: |
f5284f61 | 3244 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
c4c7412c | 3245 | case ftest_amg: /* XXXX Eventually should do to_gv. */ |
d4b87e75 | 3246 | case regexp_amg: |
b267980d NIS |
3247 | /* FAIL safe */ |
3248 | return NULL; /* Delegate operation to standard mechanisms. */ | |
81d52ecd | 3249 | |
f5284f61 IZ |
3250 | case to_sv_amg: |
3251 | case to_av_amg: | |
3252 | case to_hv_amg: | |
3253 | case to_gv_amg: | |
3254 | case to_cv_amg: | |
3255 | /* FAIL safe */ | |
b267980d | 3256 | return left; /* Delegate operation to standard mechanisms. */ |
81d52ecd | 3257 | |
a0d0e21e LW |
3258 | default: |
3259 | goto not_found; | |
3260 | } | |
3261 | if (!cv) goto not_found; | |
3262 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
0a2c84ab | 3263 | && (stash = SvSTASH(SvRV(right))) && Gv_AMG(stash) |
ad64d0ec | 3264 | && (mg = mg_find((const SV *)stash, PERL_MAGIC_overload_table)) |
b267980d | 3265 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
a6006777 | 3266 | ? (amtp = (AMT*)mg->mg_ptr)->table |
d4c19fe8 | 3267 | : NULL)) |
69815d08 RS |
3268 | && (cv = cvp[off=method])) { /* Method for right |
3269 | * argument found */ | |
3270 | lr=1; | |
bf5522a1 MB |
3271 | } else if (((cvp && amtp->fallback > AMGfallNEVER) |
3272 | || (ocvp && oamtp->fallback > AMGfallNEVER)) | |
a0d0e21e LW |
3273 | && !(flags & AMGf_unary)) { |
3274 | /* We look for substitution for | |
3275 | * comparison operations and | |
fc36a67e | 3276 | * concatenation */ |
a0d0e21e LW |
3277 | if (method==concat_amg || method==concat_ass_amg |
3278 | || method==repeat_amg || method==repeat_ass_amg) { | |
3279 | return NULL; /* Delegate operation to string conversion */ | |
3280 | } | |
3281 | off = -1; | |
3282 | switch (method) { | |
3283 | case lt_amg: | |
3284 | case le_amg: | |
3285 | case gt_amg: | |
3286 | case ge_amg: | |
3287 | case eq_amg: | |
3288 | case ne_amg: | |
2ab54efd MB |
3289 | off = ncmp_amg; |
3290 | break; | |
a0d0e21e LW |
3291 | case slt_amg: |
3292 | case sle_amg: | |
3293 | case sgt_amg: | |
3294 | case sge_amg: | |
3295 | case seq_amg: | |
3296 | case sne_amg: | |
2ab54efd MB |
3297 | off = scmp_amg; |
3298 | break; | |
a0d0e21e | 3299 | } |
bf5522a1 MB |
3300 | if (off != -1) { |
3301 | if (ocvp && (oamtp->fallback > AMGfallNEVER)) { | |
3302 | cv = ocvp[off]; | |
3303 | lr = -1; | |
3304 | } | |
3305 | if (!cv && (cvp && amtp->fallback > AMGfallNEVER)) { | |
3306 | cv = cvp[off]; | |
3307 | lr = 1; | |
3308 | } | |
3309 | } | |
3310 | if (cv) | |
2ab54efd MB |
3311 | postpr = 1; |
3312 | else | |
3313 | goto not_found; | |
a0d0e21e | 3314 | } else { |
a6006777 | 3315 | not_found: /* No method found, either report or croak */ |
b267980d NIS |
3316 | switch (method) { |
3317 | case to_sv_amg: | |
3318 | case to_av_amg: | |
3319 | case to_hv_amg: | |
3320 | case to_gv_amg: | |
3321 | case to_cv_amg: | |
3322 | /* FAIL safe */ | |
3323 | return left; /* Delegate operation to standard mechanisms. */ | |
b267980d | 3324 | } |
a0d0e21e LW |
3325 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
3326 | notfound = 1; lr = -1; | |
3327 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
3328 | notfound = 1; lr = 1; | |
bf5522a1 MB |
3329 | } else if ((use_default_op = |
3330 | (!ocvp || oamtp->fallback >= AMGfallYES) | |
3331 | && (!cvp || amtp->fallback >= AMGfallYES)) | |
3332 | && !DEBUG_o_TEST) { | |
4cc0ca18 NC |
3333 | /* Skip generating the "no method found" message. */ |
3334 | return NULL; | |
a0d0e21e | 3335 | } else { |
46fc3d4c | 3336 | SV *msg; |
774d564b | 3337 | if (off==-1) off=method; |
b267980d | 3338 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
147e3846 | 3339 | "Operation \"%s\": no method found,%sargument %s%" SVf "%s%" SVf, |
d66cca07 BF |
3340 | AMG_id2name(method + assignshift), |
3341 | (flags & AMGf_unary ? " " : "\n\tleft "), | |
3342 | SvAMAGIC(left)? | |
3343 | "in overloaded package ": | |
3344 | "has no overloaded magic", | |
3345 | SvAMAGIC(left)? | |
3346 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(left)))))): | |
3347 | SVfARG(&PL_sv_no), | |
3348 | SvAMAGIC(right)? | |
3349 | ",\n\tright argument in overloaded package ": | |
3350 | (flags & AMGf_unary | |
3351 | ? "" | |
3352 | : ",\n\tright argument has no overloaded magic"), | |
3353 | SvAMAGIC(right)? | |
3354 | SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(SvSTASH(SvRV(right)))))): | |
3355 | SVfARG(&PL_sv_no))); | |
bf5522a1 | 3356 | if (use_default_op) { |
147e3846 | 3357 | DEBUG_o( Perl_deb(aTHX_ "%" SVf, SVfARG(msg)) ); |
a0d0e21e | 3358 | } else { |
147e3846 | 3359 | Perl_croak(aTHX_ "%" SVf, SVfARG(msg)); |
a0d0e21e LW |
3360 | } |
3361 | return NULL; | |
3362 | } | |
ee239bfe | 3363 | force_cpy = force_cpy || assign; |
a0d0e21e LW |
3364 | } |
3365 | } | |
67288365 JL |
3366 | |
3367 | switch (method) { | |
3368 | /* in these cases, we're calling '+' or '-' as a fallback for a ++ or -- | |
3369 | * operation. we need this to return a value, so that it can be assigned | |
3370 | * later on, in the postpr block (case inc_amg/dec_amg), even if the | |
3371 | * increment or decrement was itself called in void context */ | |
3372 | case inc_amg: | |
3373 | if (off == add_amg) | |
3374 | force_scalar = 1; | |
3375 | break; | |
3376 | case dec_amg: | |
3377 | if (off == subtr_amg) | |
3378 | force_scalar = 1; | |
3379 | break; | |
3380 | /* in these cases, we're calling an assignment variant of an operator | |
3381 | * (+= rather than +, for instance). regardless of whether it's a | |
3382 | * fallback or not, it always has to return a value, which will be | |
3383 | * assigned to the proper variable later */ | |
3384 | case add_amg: | |
3385 | case subtr_amg: | |
3386 | case mult_amg: | |
3387 | case div_amg: | |
3388 | case modulo_amg: | |
3389 | case pow_amg: | |
3390 | case lshift_amg: | |
3391 | case rshift_amg: | |
3392 | case repeat_amg: | |
3393 | case concat_amg: | |
3394 | case band_amg: | |
3395 | case bor_amg: | |
3396 | case bxor_amg: | |
6d06ecce FC |
3397 | case sband_amg: |
3398 | case sbor_amg: | |
3399 | case sbxor_amg: | |
67288365 JL |
3400 | if (assign) |
3401 | force_scalar = 1; | |
3402 | break; | |
3403 | /* the copy constructor always needs to return a value */ | |
3404 | case copy_amg: | |
3405 | force_scalar = 1; | |
3406 | break; | |
3407 | /* because of the way these are implemented (they don't perform the | |
3408 | * dereferencing themselves, they return a reference that perl then | |
3409 | * dereferences later), they always have to be in scalar context */ | |
3410 | case to_sv_amg: | |
3411 | case to_av_amg: | |
3412 | case to_hv_amg: | |
3413 | case to_gv_amg: | |
3414 | case to_cv_amg: | |
3415 | force_scalar = 1; | |
3416 | break; | |
3417 | /* these don't have an op of their own; they're triggered by their parent | |
3418 | * op, so the context there isn't meaningful ('$a and foo()' in void | |
3419 | * context still needs to pass scalar context on to $a's bool overload) */ | |
3420 | case bool__amg: | |
3421 | case numer_amg: | |
3422 | case string_amg: | |
3423 | force_scalar = 1; | |
3424 | break; | |
3425 | } | |
3426 | ||
497b47a8 | 3427 | #ifdef DEBUGGING |
a0d0e21e | 3428 | if (!notfound) { |
497b47a8 | 3429 | DEBUG_o(Perl_deb(aTHX_ |
147e3846 | 3430 | "Overloaded operator \"%s\"%s%s%s:\n\tmethod%s found%s in package %" SVf "%s\n", |
497b47a8 JH |
3431 | AMG_id2name(off), |
3432 | method+assignshift==off? "" : | |
a0288114 | 3433 | " (initially \"", |
497b47a8 JH |
3434 | method+assignshift==off? "" : |
3435 | AMG_id2name(method+assignshift), | |
a0288114 | 3436 | method+assignshift==off? "" : "\")", |
497b47a8 JH |
3437 | flags & AMGf_unary? "" : |
3438 | lr==1 ? " for right argument": " for left argument", | |
3439 | flags & AMGf_unary? " for argument" : "", | |
d66cca07 | 3440 | stash ? SVfARG(sv_2mortal(newSVhek(HvNAME_HEK(stash)))) : SVfARG(newSVpvs_flags("null", SVs_TEMP)), |
497b47a8 | 3441 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe | 3442 | } |
497b47a8 | 3443 | #endif |
748a9306 LW |
3444 | /* Since we use shallow copy during assignment, we need |
3445 | * to dublicate the contents, probably calling user-supplied | |
3446 | * version of copy operator | |
3447 | */ | |
ee239bfe IZ |
3448 | /* We need to copy in following cases: |
3449 | * a) Assignment form was called. | |
3450 | * assignshift==1, assign==T, method + 1 == off | |
3451 | * b) Increment or decrement, called directly. | |
3452 | * assignshift==0, assign==0, method + 0 == off | |
3453 | * c) Increment or decrement, translated to assignment add/subtr. | |
b267980d | 3454 | * assignshift==0, assign==T, |
ee239bfe IZ |
3455 | * force_cpy == T |
3456 | * d) Increment or decrement, translated to nomethod. | |
b267980d | 3457 | * assignshift==0, assign==0, |
ee239bfe IZ |
3458 | * force_cpy == T |
3459 | * e) Assignment form translated to nomethod. | |
3460 | * assignshift==1, assign==T, method + 1 != off | |
3461 | * force_cpy == T | |
3462 | */ | |
3463 | /* off is method, method+assignshift, or a result of opcode substitution. | |
3464 | * In the latter case assignshift==0, so only notfound case is important. | |
3465 | */ | |
73512201 | 3466 | if ( (lr == -1) && ( ( (method + assignshift == off) |
ee239bfe | 3467 | && (assign || (method == inc_amg) || (method == dec_amg))) |
73512201 | 3468 | || force_cpy) ) |
6f1401dc | 3469 | { |
1b38c28e NC |
3470 | /* newSVsv does not behave as advertised, so we copy missing |
3471 | * information by hand */ | |
3472 | SV *tmpRef = SvRV(left); | |
3473 | SV *rv_copy; | |
31d632c3 | 3474 | if (SvREFCNT(tmpRef) > 1 && (rv_copy = AMG_CALLunary(left,copy_amg))) { |
1b38c28e NC |
3475 | SvRV_set(left, rv_copy); |
3476 | SvSETMAGIC(left); | |
e7881358 | 3477 | SvREFCNT_dec_NN(tmpRef); |
1b38c28e | 3478 | } |
6f1401dc DM |
3479 | } |
3480 | ||
a0d0e21e LW |
3481 | { |
3482 | dSP; | |
3483 | BINOP myop; | |
3484 | SV* res; | |
b7787f18 | 3485 | const bool oldcatch = CATCH_GET; |
67288365 | 3486 | I32 oldmark, nret; |
e839e6ed DM |
3487 | /* for multiconcat, we may call overload several times, |
3488 | * with the context of individual concats being scalar, | |
3489 | * regardless of the overall context of the multiconcat op | |
3490 | */ | |
3491 | U8 gimme = (force_scalar || PL_op->op_type == OP_MULTICONCAT) | |
3492 | ? G_SCALAR : GIMME_V; | |
a0d0e21e | 3493 | |
54310121 | 3494 | CATCH_SET(TRUE); |
a0d0e21e LW |
3495 | Zero(&myop, 1, BINOP); |
3496 | myop.op_last = (OP *) &myop; | |
b37c2d43 | 3497 | myop.op_next = NULL; |
67288365 JL |
3498 | myop.op_flags = OPf_STACKED; |
3499 | ||
3500 | switch (gimme) { | |
3501 | case G_VOID: | |
3502 | myop.op_flags |= OPf_WANT_VOID; | |
3503 | break; | |
3504 | case G_ARRAY: | |
3505 | if (flags & AMGf_want_list) { | |
3506 | myop.op_flags |= OPf_WANT_LIST; | |
3507 | break; | |
3508 | } | |
3509 | /* FALLTHROUGH */ | |
3510 | default: | |
3511 | myop.op_flags |= OPf_WANT_SCALAR; | |
3512 | break; | |
3513 | } | |
a0d0e21e | 3514 | |
e788e7d3 | 3515 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e | 3516 | ENTER; |
462e5cf6 | 3517 | SAVEOP(); |
533c011a | 3518 | PL_op = (OP *) &myop; |
3280af22 | 3519 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a | 3520 | PL_op->op_private |= OPpENTERSUB_DB; |
897d3989 | 3521 | Perl_pp_pushmark(aTHX); |
a0d0e21e | 3522 | |
924508f0 | 3523 | EXTEND(SP, notfound + 5); |
a0d0e21e LW |
3524 | PUSHs(lr>0? right: left); |
3525 | PUSHs(lr>0? left: right); | |
3280af22 | 3526 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e | 3527 | if (notfound) { |
59cd0e26 NC |
3528 | PUSHs(newSVpvn_flags(AMG_id2name(method + assignshift), |
3529 | AMG_id2namelen(method + assignshift), SVs_TEMP)); | |
a0d0e21e | 3530 | } |
636ac8fc FC |
3531 | else if (flags & AMGf_numarg) |
3532 | PUSHs(&PL_sv_undef); | |
3533 | if (flags & AMGf_numarg) | |
3534 | PUSHs(&PL_sv_yes); | |
ad64d0ec | 3535 | PUSHs(MUTABLE_SV(cv)); |
a0d0e21e | 3536 | PUTBACK; |
67288365 | 3537 | oldmark = TOPMARK; |
a0d0e21e | 3538 | |
139d0ce6 | 3539 | if ((PL_op = PL_ppaddr[OP_ENTERSUB](aTHX))) |
cea2e8a9 | 3540 | CALLRUNOPS(aTHX); |
a0d0e21e LW |
3541 | LEAVE; |
3542 | SPAGAIN; | |
67288365 JL |
3543 | nret = SP - (PL_stack_base + oldmark); |
3544 | ||
3545 | switch (gimme) { | |
3546 | case G_VOID: | |
3547 | /* returning NULL has another meaning, and we check the context | |
3548 | * at the call site too, so this can be differentiated from the | |
3549 | * scalar case */ | |
3550 | res = &PL_sv_undef; | |
3551 | SP = PL_stack_base + oldmark; | |
3552 | break; | |
2165bd23 | 3553 | case G_ARRAY: |
67288365 JL |
3554 | if (flags & AMGf_want_list) { |
3555 | res = sv_2mortal((SV *)newAV()); | |
3556 | av_extend((AV *)res, nret); | |
3557 | while (nret--) | |
3558 | av_store((AV *)res, nret, POPs); | |
3559 | break; | |
3560 | } | |
3561 | /* FALLTHROUGH */ | |
67288365 JL |
3562 | default: |
3563 | res = POPs; | |
3564 | break; | |
3565 | } | |
a0d0e21e | 3566 | |
ebafeae7 | 3567 | PUTBACK; |
d3acc0f7 | 3568 | POPSTACK; |
54310121 | 3569 | CATCH_SET(oldcatch); |
a0d0e21e | 3570 | |
a0d0e21e | 3571 | if (postpr) { |
b7787f18 | 3572 | int ans; |
a0d0e21e LW |
3573 | switch (method) { |
3574 | case le_amg: | |
3575 | case sle_amg: | |
3576 | ans=SvIV(res)<=0; break; | |
3577 | case lt_amg: | |
3578 | case slt_amg: | |
3579 | ans=SvIV(res)<0; break; | |
3580 | case ge_amg: | |
3581 | case sge_amg: | |
3582 | ans=SvIV(res)>=0; break; | |
3583 | case gt_amg: | |
3584 | case sgt_amg: | |
3585 | ans=SvIV(res)>0; break; | |
3586 | case eq_amg: | |
3587 | case seq_amg: | |
3588 | ans=SvIV(res)==0; break; | |
3589 | case ne_amg: | |
3590 | case sne_amg: | |
3591 | ans=SvIV(res)!=0; break; | |
3592 | case inc_amg: | |
3593 | case dec_amg: | |
bbce6d69 | 3594 | SvSetSV(left,res); return left; |
dc437b57 | 3595 | case not_amg: |
f4c975aa | 3596 | ans=!SvTRUE_NN(res); break; |
b7787f18 AL |
3597 | default: |
3598 | ans=0; break; | |
a0d0e21e | 3599 | } |
54310121 | 3600 | return boolSV(ans); |
748a9306 LW |
3601 | } else if (method==copy_amg) { |
3602 | if (!SvROK(res)) { | |
cea2e8a9 | 3603 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
748a9306 LW |
3604 | } |
3605 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
3606 | } else { |
3607 | return res; | |
3608 | } | |
3609 | } | |
3610 | } | |
c9d5ac95 | 3611 | |
f5c1e807 NC |
3612 | void |
3613 | Perl_gv_name_set(pTHX_ GV *gv, const char *name, U32 len, U32 flags) | |
3614 | { | |
3615 | dVAR; | |
acda4c6a | 3616 | U32 hash; |
f5c1e807 | 3617 | |
7918f24d | 3618 | PERL_ARGS_ASSERT_GV_NAME_SET; |
f5c1e807 | 3619 | |
acda4c6a | 3620 | if (len > I32_MAX) |
147e3846 | 3621 | Perl_croak(aTHX_ "panic: gv name too long (%" UVuf ")", (UV) len); |
acda4c6a | 3622 | |
ae8cc45f NC |
3623 | if (!(flags & GV_ADD) && GvNAME_HEK(gv)) { |
3624 | unshare_hek(GvNAME_HEK(gv)); | |
3625 | } | |
3626 | ||
acda4c6a | 3627 | PERL_HASH(hash, name, len); |
c60dbbc3 | 3628 | GvNAME_HEK(gv) = share_hek(name, (flags & SVf_UTF8 ? -(I32)len : (I32)len), hash); |
f5c1e807 NC |
3629 | } |
3630 | ||
66610fdd | 3631 | /* |
f7461760 Z |
3632 | =for apidoc gv_try_downgrade |
3633 | ||
2867cdbc Z |
3634 | If the typeglob C<gv> can be expressed more succinctly, by having |
3635 | something other than a real GV in its place in the stash, replace it | |
3636 | with the optimised form. Basic requirements for this are that C<gv> | |
3637 | is a real typeglob, is sufficiently ordinary, and is only referenced | |
3638 | from its package. This function is meant to be used when a GV has been | |
3639 | looked up in part to see what was there, causing upgrading, but based | |
3640 | on what was found it turns out that the real GV isn't required after all. | |
3641 | ||
3642 | If C<gv> is a completely empty typeglob, it is deleted from the stash. | |
3643 | ||
3644 | If C<gv> is a typeglob containing only a sufficiently-ordinary constant | |
3645 | sub, the typeglob is replaced with a scalar-reference placeholder that | |
3646 | more compactly represents the same thing. | |
f7461760 Z |
3647 | |
3648 | =cut | |
3649 | */ | |
3650 | ||
3651 | void | |
3652 | Perl_gv_try_downgrade(pTHX_ GV *gv) | |
3653 | { | |
3654 | HV *stash; | |
3655 | CV *cv; | |
3656 | HEK *namehek; | |
3657 | SV **gvp; | |
3658 | PERL_ARGS_ASSERT_GV_TRY_DOWNGRADE; | |
95f56751 FC |
3659 | |
3660 | /* XXX Why and where does this leave dangling pointers during global | |
3661 | destruction? */ | |
627364f1 | 3662 | if (PL_phase == PERL_PHASE_DESTRUCT) return; |
95f56751 | 3663 | |
2867cdbc | 3664 | if (!(SvREFCNT(gv) == 1 && SvTYPE(gv) == SVt_PVGV && !SvFAKE(gv) && |
803f2748 | 3665 | !SvOBJECT(gv) && !SvREADONLY(gv) && |
f7461760 | 3666 | isGV_with_GP(gv) && GvGP(gv) && |
2867cdbc | 3667 | !GvINTRO(gv) && GvREFCNT(gv) == 1 && |
f7461760 | 3668 | !GvSV(gv) && !GvAV(gv) && !GvHV(gv) && !GvIOp(gv) && !GvFORM(gv) && |
099be4f1 | 3669 | GvEGVx(gv) == gv && (stash = GvSTASH(gv)))) |
2867cdbc | 3670 | return; |
2be08ad1 FC |
3671 | if (gv == PL_statgv || gv == PL_last_in_gv || gv == PL_stderrgv) |
3672 | return; | |
803f2748 DM |
3673 | if (SvMAGICAL(gv)) { |
3674 | MAGIC *mg; | |
3675 | /* only backref magic is allowed */ | |
3676 | if (SvGMAGICAL(gv) || SvSMAGICAL(gv)) | |
3677 | return; | |
3678 | for (mg = SvMAGIC(gv); mg; mg = mg->mg_moremagic) { | |
3679 | if (mg->mg_type != PERL_MAGIC_backref) | |
3680 | return; | |
3681 | } | |
3682 | } | |
2867cdbc Z |
3683 | cv = GvCV(gv); |
3684 | if (!cv) { | |
3685 | HEK *gvnhek = GvNAME_HEK(gv); | |
0ca9877d | 3686 | (void)hv_deletehek(stash, gvnhek, G_DISCARD); |
8941bf97 | 3687 | } else if (GvMULTI(gv) && cv && SvREFCNT(cv) == 1 && |
f7461760 | 3688 | !SvOBJECT(cv) && !SvMAGICAL(cv) && !SvREADONLY(cv) && |
34d81fc4 | 3689 | CvSTASH(cv) == stash && !CvNAMED(cv) && CvGV(cv) == gv && |
f7461760 Z |
3690 | CvCONST(cv) && !CvMETHOD(cv) && !CvLVALUE(cv) && !CvUNIQUE(cv) && |
3691 | !CvNODEBUG(cv) && !CvCLONE(cv) && !CvCLONED(cv) && !CvANON(cv) && | |
3692 | (namehek = GvNAME_HEK(gv)) && | |
48c2c411 | 3693 | (gvp = hv_fetchhek(stash, namehek, 0)) && |
f7461760 Z |
3694 | *gvp == (SV*)gv) { |
3695 | SV *value = SvREFCNT_inc(CvXSUBANY(cv).any_ptr); | |
70e5f2b5 | 3696 | const bool imported = !!GvIMPORTED_CV(gv); |
f7461760 Z |
3697 | SvREFCNT(gv) = 0; |
3698 | sv_clear((SV*)gv); | |
3699 | SvREFCNT(gv) = 1; | |
70e5f2b5 | 3700 | SvFLAGS(gv) = SVt_IV|SVf_ROK|SVprv_PCS_IMPORTED * imported; |
dc6369ef EH |
3701 | |
3702 | /* See also: 'SET_SVANY_FOR_BODYLESS_IV' in sv.c */ | |
f7461760 Z |
3703 | SvANY(gv) = (XPVGV*)((char*)&(gv->sv_u.svu_iv) - |
3704 | STRUCT_OFFSET(XPVIV, xiv_iv)); | |
3705 | SvRV_set(gv, value); | |
3706 | } | |
3707 | } | |
3708 | ||
9e3fb20c FC |
3709 | GV * |
3710 | Perl_gv_override(pTHX_ const char * const name, const STRLEN len) | |
3711 | { | |
3712 | GV *gv = gv_fetchpvn(name, len, GV_NOTQUAL, SVt_PVCV); | |
3713 | GV * const *gvp; | |
3714 | PERL_ARGS_ASSERT_GV_OVERRIDE; | |
3715 | if (gv && GvCVu(gv) && GvIMPORTED_CV(gv)) return gv; | |
3716 | gvp = (GV**)hv_fetch(PL_globalstash, name, len, FALSE); | |
3717 | gv = gvp ? *gvp : NULL; | |
3718 | if (gv && !isGV(gv)) { | |
3719 | if (!SvPCS_IMPORTED(gv)) return NULL; | |
3720 | gv_init(gv, PL_globalstash, name, len, 0); | |
3721 | return gv; | |
3722 | } | |
3723 | return gv && GvCVu(gv) && GvIMPORTED_CV(gv) ? gv : NULL; | |
3724 | } | |
3725 | ||
4aaa4757 FC |
3726 | #include "XSUB.h" |
3727 | ||
3728 | static void | |
3729 | core_xsub(pTHX_ CV* cv) | |
3730 | { | |
3731 | Perl_croak(aTHX_ | |
3732 | "&CORE::%s cannot be called directly", GvNAME(CvGV(cv)) | |
3733 | ); | |
3734 | } | |
3735 | ||
f7461760 | 3736 | /* |
14d04a33 | 3737 | * ex: set ts=8 sts=4 sw=4 et: |
37442d52 | 3738 | */ |