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1/* gv.h
2 *
3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
4 * 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 by Larry Wall and others
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 *
9 */
10
11struct gp {
12 SV * gp_sv; /* scalar value */
13 struct io * gp_io; /* filehandle value */
14 CV * gp_cv; /* subroutine value */
15 U32 gp_cvgen; /* generational validity of cached gv_cv */
16 U32 gp_refcnt; /* how many globs point to this? */
17 HV * gp_hv; /* hash value */
18 AV * gp_av; /* array value */
19 CV * gp_form; /* format value */
20 GV * gp_egv; /* effective gv, if *glob */
21 line_t gp_line; /* line first declared at (for -w) */
22 HEK * gp_file_hek; /* file first declared in (for -w) */
23};
24
25#define GvXPVGV(gv) ((XPVGV*)SvANY(gv))
26
27
28#if defined (DEBUGGING) && defined(__GNUC__) && !defined(PERL_GCC_BRACE_GROUPS_FORBIDDEN) && !defined(__INTEL_COMPILER)
29# define GvGP(gv) \
30 (0+(*({GV *const _gvgp = (GV *) (gv); \
31 assert(SvTYPE(_gvgp) == SVt_PVGV || SvTYPE(_gvgp) == SVt_PVLV); \
32 assert(isGV_with_GP(_gvgp)); \
33 &((_gvgp)->sv_u.svu_gp);})))
34# define GvGP_set(gv,gp) \
35 {GV *const _gvgp = (GV *) (gv); \
36 assert(SvTYPE(_gvgp) == SVt_PVGV || SvTYPE(_gvgp) == SVt_PVLV); \
37 assert(isGV_with_GP(_gvgp)); \
38 (_gvgp)->sv_u.svu_gp = (gp); }
39# define GvFLAGS(gv) \
40 (*({GV *const _gvflags = (GV *) (gv); \
41 assert(SvTYPE(_gvflags) == SVt_PVGV || SvTYPE(_gvflags) == SVt_PVLV); \
42 assert(isGV_with_GP(_gvflags)); \
43 &(GvXPVGV(_gvflags)->xpv_cur);}))
44# define GvSTASH(gv) \
45 (*({ GV * const _gvstash = (GV *) (gv); \
46 assert(isGV_with_GP(_gvstash)); \
47 assert(SvTYPE(_gvstash) == SVt_PVGV || SvTYPE(_gvstash) >= SVt_PVLV); \
48 &(GvXPVGV(_gvstash)->xnv_u.xgv_stash); \
49 }))
50# define GvNAME_HEK(gv) \
51 (*({ GV * const _gvname_hek = (GV *) (gv); \
52 assert(isGV_with_GP(_gvname_hek)); \
53 assert(SvTYPE(_gvname_hek) == SVt_PVGV || SvTYPE(_gvname_hek) >= SVt_PVLV); \
54 assert(!SvVALID(_gvname_hek)); \
55 &(GvXPVGV(_gvname_hek)->xiv_u.xivu_namehek); \
56 }))
57# define GvNAME_get(gv) ({ assert(GvNAME_HEK(gv)); (char *)HEK_KEY(GvNAME_HEK(gv)); })
58# define GvNAMELEN_get(gv) ({ assert(GvNAME_HEK(gv)); HEK_LEN(GvNAME_HEK(gv)); })
59# define GvNAMEUTF8(gv) ({ assert(GvNAME_HEK(gv)); HEK_UTF8(GvNAME_HEK(gv)); })
60#else
61# define GvGP(gv) (0+(gv)->sv_u.svu_gp)
62# define GvGP_set(gv,gp) ((gv)->sv_u.svu_gp = (gp))
63# define GvFLAGS(gv) (GvXPVGV(gv)->xpv_cur)
64# define GvSTASH(gv) (GvXPVGV(gv)->xnv_u.xgv_stash)
65# define GvNAME_HEK(gv) (GvXPVGV(gv)->xiv_u.xivu_namehek)
66# define GvNAME_get(gv) HEK_KEY(GvNAME_HEK(gv))
67# define GvNAMELEN_get(gv) HEK_LEN(GvNAME_HEK(gv))
68# define GvNAMEUTF8(gv) HEK_UTF8(GvNAME_HEK(gv))
69#endif
70
71#define GvNAME(gv) GvNAME_get(gv)
72#define GvNAMELEN(gv) GvNAMELEN_get(gv)
73
74#define GvASSIGN_GENERATION(gv) (0 + ((XPV*) SvANY(gv))->xpv_len)
75#define GvASSIGN_GENERATION_set(gv,val) \
76 STMT_START { assert(SvTYPE(gv) == SVt_PVGV); \
77 (((XPV*) SvANY(gv))->xpv_len = (val)); } STMT_END
78
79/*
80=head1 GV Functions
81
82=for apidoc Am|SV*|GvSV|GV* gv
83
84Return the SV from the GV.
85
86=for apidoc Am|AV*|GvAV|GV* gv
87
88Return the AV from the GV.
89
90=for apidoc Am|HV*|GvHV|GV* gv
91
92Return the HV from the GV.
93
94=for apidoc Am|CV*|GvCV|GV* gv
95
96Return the CV from the GV.
97
98=cut
99*/
100
101#define GvSV(gv) (GvGP(gv)->gp_sv)
102#ifdef PERL_DONT_CREATE_GVSV
103#define GvSVn(gv) (*(GvGP(gv)->gp_sv ? \
104 &(GvGP(gv)->gp_sv) : \
105 &(GvGP(gv_SVadd(gv))->gp_sv)))
106#else
107#define GvSVn(gv) GvSV(gv)
108#endif
109
110#define GvREFCNT(gv) (GvGP(gv)->gp_refcnt)
111#define GvIO(gv) \
112 ( \
113 (gv) \
114 && ( \
115 SvTYPE((const SV*)(gv)) == SVt_PVGV \
116 || SvTYPE((const SV*)(gv)) == SVt_PVLV \
117 ) \
118 && GvGP(gv) \
119 ? GvIOp(gv) \
120 : NULL \
121 )
122#define GvIOp(gv) (GvGP(gv)->gp_io)
123#define GvIOn(gv) (GvIO(gv) ? GvIOp(gv) : GvIOp(gv_IOadd(gv)))
124
125#define GvFORM(gv) (GvGP(gv)->gp_form)
126#define GvAV(gv) (GvGP(gv)->gp_av)
127
128#define GvAVn(gv) (GvGP(gv)->gp_av ? \
129 GvGP(gv)->gp_av : \
130 GvGP(gv_AVadd(gv))->gp_av)
131#define GvHV(gv) ((GvGP(gv))->gp_hv)
132
133#define GvHVn(gv) (GvGP(gv)->gp_hv ? \
134 GvGP(gv)->gp_hv : \
135 GvGP(gv_HVadd(gv))->gp_hv)
136
137#define GvCV(gv) (0+GvGP(gv)->gp_cv)
138#define GvCV_set(gv,cv) (GvGP(gv)->gp_cv = (cv))
139#define GvCVGEN(gv) (GvGP(gv)->gp_cvgen)
140#define GvCVu(gv) (GvGP(gv)->gp_cvgen ? NULL : GvGP(gv)->gp_cv)
141
142#define GvLINE(gv) (GvGP(gv)->gp_line)
143#define GvFILE_HEK(gv) (GvGP(gv)->gp_file_hek)
144#define GvFILE(gv) (GvFILE_HEK(gv) ? HEK_KEY(GvFILE_HEK(gv)) : NULL)
145#define GvFILEGV(gv) (gv_fetchfile(GvFILE(gv)))
146
147#define GvEGV(gv) (GvGP(gv)->gp_egv)
148#define GvEGVx(gv) (isGV_with_GP(gv) ? GvEGV(gv) : NULL)
149#define GvENAME(gv) GvNAME(GvEGV(gv) ? GvEGV(gv) : gv)
150#define GvENAMELEN(gv) GvNAMELEN(GvEGV(gv) ? GvEGV(gv) : gv)
151#define GvENAMEUTF8(gv) GvNAMEUTF8(GvEGV(gv) ? GvEGV(gv) : gv)
152#define GvENAME_HEK(gv) GvNAME_HEK(GvEGV(gv) ? GvEGV(gv) : gv)
153#define GvESTASH(gv) GvSTASH(GvEGV(gv) ? GvEGV(gv) : gv)
154
155#define GVf_INTRO 0x01
156#define GVf_MULTI 0x02
157#define GVf_ASSUMECV 0x04
158#define GVf_IN_PAD 0x08
159#define GVf_IMPORTED 0xF0
160#define GVf_IMPORTED_SV 0x10
161#define GVf_IMPORTED_AV 0x20
162#define GVf_IMPORTED_HV 0x40
163#define GVf_IMPORTED_CV 0x80
164
165#define GvINTRO(gv) (GvFLAGS(gv) & GVf_INTRO)
166#define GvINTRO_on(gv) (GvFLAGS(gv) |= GVf_INTRO)
167#define GvINTRO_off(gv) (GvFLAGS(gv) &= ~GVf_INTRO)
168
169#define GvMULTI(gv) (GvFLAGS(gv) & GVf_MULTI)
170#define GvMULTI_on(gv) (GvFLAGS(gv) |= GVf_MULTI)
171#define GvMULTI_off(gv) (GvFLAGS(gv) &= ~GVf_MULTI)
172
173#define GvASSUMECV(gv) (GvFLAGS(gv) & GVf_ASSUMECV)
174#define GvASSUMECV_on(gv) (GvFLAGS(gv) |= GVf_ASSUMECV)
175#define GvASSUMECV_off(gv) (GvFLAGS(gv) &= ~GVf_ASSUMECV)
176
177#define GvIMPORTED(gv) (GvFLAGS(gv) & GVf_IMPORTED)
178#define GvIMPORTED_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED)
179#define GvIMPORTED_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED)
180
181#define GvIMPORTED_SV(gv) (GvFLAGS(gv) & GVf_IMPORTED_SV)
182#define GvIMPORTED_SV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_SV)
183#define GvIMPORTED_SV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_SV)
184
185#define GvIMPORTED_AV(gv) (GvFLAGS(gv) & GVf_IMPORTED_AV)
186#define GvIMPORTED_AV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_AV)
187#define GvIMPORTED_AV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_AV)
188
189#define GvIMPORTED_HV(gv) (GvFLAGS(gv) & GVf_IMPORTED_HV)
190#define GvIMPORTED_HV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_HV)
191#define GvIMPORTED_HV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_HV)
192
193#define GvIMPORTED_CV(gv) (GvFLAGS(gv) & GVf_IMPORTED_CV)
194#define GvIMPORTED_CV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_CV)
195#define GvIMPORTED_CV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_CV)
196
197#define GvIN_PAD(gv) (GvFLAGS(gv) & GVf_IN_PAD)
198#define GvIN_PAD_on(gv) (GvFLAGS(gv) |= GVf_IN_PAD)
199#define GvIN_PAD_off(gv) (GvFLAGS(gv) &= ~GVf_IN_PAD)
200
201#ifndef PERL_CORE
202# define Nullgv Null(GV*)
203#endif
204
205#define DM_RUID 0x001
206#define DM_EUID 0x002
207#define DM_UID (DM_RUID|DM_EUID)
208#define DM_ARRAY_ISA 0x004
209#define DM_RGID 0x010
210#define DM_EGID 0x020
211#define DM_GID (DM_RGID|DM_EGID)
212#define DM_DELAY 0x100
213
214/*
215 * symbol creation flags, for use in gv_fetchpv() and get_*v()
216 */
217#define GV_ADD 0x01 /* add, if symbol not already there
218 For gv_name_set, adding a HEK for the first
219 time, so don't try to free what's there. */
220#define GV_ADDMULTI 0x02 /* add, pretending it has been added
221 already; used also by gv_init_* */
222#define GV_ADDWARN 0x04 /* add, but warn if symbol wasn't already there */
223#define GV_ADDINEVAL 0x08 /* add, as though we're doing so within an eval */
224#define GV_NOINIT 0x10 /* add, but don't init symbol, if type != PVGV */
225/* This is used by toke.c to avoid turing placeholder constants in the symbol
226 table into full PVGVs with attached constant subroutines. */
227#define GV_NOADD_NOINIT 0x20 /* Don't add the symbol if it's not there.
228 Don't init it if it is there but ! PVGV */
229#define GV_NOEXPAND 0x40 /* Don't expand SvOK() entries to PVGV */
230#define GV_NOTQUAL 0x80 /* A plain symbol name, not qualified with a
231 package (so skip checks for :: and ') */
232#define GV_AUTOLOAD 0x100 /* gv_fetchmethod_flags() should AUTOLOAD */
233#define GV_CROAK 0x200 /* gv_fetchmethod_flags() should croak */
234#define GV_ADDMG 0x400 /* add if magical */
235#define GV_NO_SVGMAGIC 0x800 /* Skip get-magic on an SV argument;
236 used only by gv_fetchsv(_nomg) */
237
238/* Flags for gv_fetchmeth_pvn and gv_autoload_pvn*/
239#define GV_SUPER 0x1000 /* SUPER::method */
240
241/* Flags for gv_autoload_*/
242#define GV_AUTOLOAD_ISMETHOD 1 /* autoloading a method? */
243
244/* SVf_UTF8 (more accurately the return value from SvUTF8) is also valid
245 as a flag to various gv_* functions, so ensure it lies
246 outside this range.
247*/
248
249#define GV_NOADD_MASK \
250 (SVf_UTF8|GV_NOADD_NOINIT|GV_NOEXPAND|GV_NOTQUAL|GV_ADDMG|GV_NO_SVGMAGIC)
251/* The bit flags that don't cause gv_fetchpv() to add a symbol if not
252 found (with the exception GV_ADDMG, which *might* cause the symbol
253 to be added) */
254
255#define gv_fullname3(sv,gv,prefix) gv_fullname4(sv,gv,prefix,TRUE)
256#define gv_efullname3(sv,gv,prefix) gv_efullname4(sv,gv,prefix,TRUE)
257#define gv_fetchmethod(stash, name) gv_fetchmethod_autoload(stash, name, TRUE)
258#define gv_fetchsv_nomg(n,f,t) gv_fetchsv(n,(f)|GV_NO_SVGMAGIC,t)
259#define gv_init(gv,stash,name,len,multi) \
260 gv_init_pvn(gv,stash,name,len,GV_ADDMULTI*!!(multi))
261#define gv_fetchmeth(stash,name,len,level) gv_fetchmeth_pvn(stash, name, len, level, 0)
262#define gv_fetchmeth_autoload(stash,name,len,level) gv_fetchmeth_pvn_autoload(stash, name, len, level, 0)
263#define gv_fetchmethod_flags(stash,name,flags) gv_fetchmethod_pv_flags(stash, name, flags)
264#define gv_autoload4(stash, name, len, method) \
265 gv_autoload_pvn(stash, name, len, !!(method))
266#define newGVgen(pack) newGVgen_flags(pack, 0)
267#define gv_method_changed(gv) \
268 ( \
269 assert_(isGV_with_GP(gv)) \
270 GvREFCNT(gv) > 1 \
271 ? (void)++PL_sub_generation \
272 : mro_method_changed_in(GvSTASH(gv)) \
273 )
274
275#define gv_AVadd(gv) gv_add_by_type((gv), SVt_PVAV)
276#define gv_HVadd(gv) gv_add_by_type((gv), SVt_PVHV)
277#define gv_IOadd(gv) gv_add_by_type((gv), SVt_PVIO)
278#define gv_SVadd(gv) gv_add_by_type((gv), SVt_NULL)
279
280/*
281 * Local variables:
282 * c-indentation-style: bsd
283 * c-basic-offset: 4
284 * indent-tabs-mode: nil
285 * End:
286 *
287 * ex: set ts=8 sts=4 sw=4 et:
288 */
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