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1 /* gv.h 2 * 3 * Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 4 * 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 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 11 struct 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 (*({GV *const shplep = (GV *) (gv); \ 31 assert(SvTYPE(shplep) == SVt_PVGV || SvTYPE(shplep) == SVt_PVLV); \ 32 assert(isGV_with_GP(shplep)); \ 33 &((shplep)->sv_u.svu_gp);})) 34 # define GvFLAGS(gv) \ 35 (*({GV *const yaah = (GV *) (gv); \ 36 assert(SvTYPE(yaah) == SVt_PVGV || SvTYPE(yaah) == SVt_PVLV); \ 37 assert(isGV_with_GP(yaah)); \ 38 &(GvXPVGV(yaah)->xpv_cur);})) 39 # define GvSTASH(gv) \ 40 (*({ GV * const _gv = (GV *) (gv); \ 41 assert(isGV_with_GP(_gv)); \ 42 assert(SvTYPE(_gv) == SVt_PVGV || SvTYPE(_gv) >= SVt_PVLV); \ 43 &(GvXPVGV(_gv)->xnv_u.xgv_stash); \ 44 })) 45 # define GvNAME_HEK(gv) \ 46 (*({ GV * const zzzz = (GV *) (gv); \ 47 assert(isGV_with_GP(zzzz)); \ 48 assert(SvTYPE(zzzz) == SVt_PVGV || SvTYPE(zzzz) >= SVt_PVLV); \ 49 assert(!SvVALID(zzzz)); \ 50 &(GvXPVGV(zzzz)->xiv_u.xivu_namehek); \ 51 })) 52 # define GvNAME_get(gv) ({ assert(GvNAME_HEK(gv)); HEK_KEY(GvNAME_HEK(gv)); }) 53 # define GvNAMELEN_get(gv) ({ assert(GvNAME_HEK(gv)); HEK_LEN(GvNAME_HEK(gv)); }) 54 #else 55 # define GvGP(gv) ((gv)->sv_u.svu_gp) 56 # define GvFLAGS(gv) (GvXPVGV(gv)->xpv_cur) 57 # define GvSTASH(gv) (GvXPVGV(gv)->xnv_u.xgv_stash) 58 # define GvNAME_HEK(gv) (GvXPVGV(gv)->xiv_u.xivu_namehek) 59 # define GvNAME_get(gv) HEK_KEY(GvNAME_HEK(gv)) 60 # define GvNAMELEN_get(gv) HEK_LEN(GvNAME_HEK(gv)) 61 #endif 62 63 #define GvNAME(gv) GvNAME_get(gv) 64 #define GvNAMELEN(gv) GvNAMELEN_get(gv) 65 66 #define GvASSIGN_GENERATION(gv) (0 + ((XPV*) SvANY(gv))->xpv_len) 67 #define GvASSIGN_GENERATION_set(gv,val) \ 68 STMT_START { assert(SvTYPE(gv) == SVt_PVGV); \ 69 (((XPV*) SvANY(gv))->xpv_len = (val)); } STMT_END 70 71 /* 72 =head1 GV Functions 73 74 =for apidoc Am|SV*|GvSV|GV* gv 75 76 Return the SV from the GV. 77 78 =cut 79 */ 80 81 #define GvSV(gv) (GvGP(gv)->gp_sv) 82 #ifdef PERL_DONT_CREATE_GVSV 83 #define GvSVn(gv) (*(GvGP(gv)->gp_sv ? \ 84 &(GvGP(gv)->gp_sv) : \ 85 &(GvGP(gv_SVadd(gv))->gp_sv))) 86 #else 87 #define GvSVn(gv) GvSV(gv) 88 #endif 89 90 #define GvREFCNT(gv) (GvGP(gv)->gp_refcnt) 91 #define GvIO(gv) ((gv) && SvTYPE((SV*)gv) == SVt_PVGV && GvGP(gv) ? GvIOp(gv) : NULL) 92 #define GvIOp(gv) (GvGP(gv)->gp_io) 93 #define GvIOn(gv) (GvIO(gv) ? GvIOp(gv) : GvIOp(gv_IOadd(gv))) 94 95 #define GvFORM(gv) (GvGP(gv)->gp_form) 96 #define GvAV(gv) (GvGP(gv)->gp_av) 97 98 /* This macro is deprecated. Do not use! */ 99 #define GvREFCNT_inc(gv) ((GV*)SvREFCNT_inc(gv)) /* DO NOT USE */ 100 101 #define GvAVn(gv) (GvGP(gv)->gp_av ? \ 102 GvGP(gv)->gp_av : \ 103 GvGP(gv_AVadd(gv))->gp_av) 104 #define GvHV(gv) ((GvGP(gv))->gp_hv) 105 106 #define GvHVn(gv) (GvGP(gv)->gp_hv ? \ 107 GvGP(gv)->gp_hv : \ 108 GvGP(gv_HVadd(gv))->gp_hv) 109 110 #define GvCV(gv) (GvGP(gv)->gp_cv) 111 #define GvCVGEN(gv) (GvGP(gv)->gp_cvgen) 112 #define GvCVu(gv) (GvGP(gv)->gp_cvgen ? NULL : GvGP(gv)->gp_cv) 113 114 #define GvLINE(gv) (GvGP(gv)->gp_line) 115 #define GvFILE_HEK(gv) (GvGP(gv)->gp_file_hek) 116 #define GvFILE(gv) (GvFILE_HEK(gv) ? HEK_KEY(GvFILE_HEK(gv)) : NULL) 117 #define GvFILEGV(gv) (gv_fetchfile(GvFILE(gv))) 118 119 #define GvEGV(gv) (GvGP(gv)->gp_egv) 120 #define GvENAME(gv) GvNAME(GvEGV(gv) ? GvEGV(gv) : gv) 121 #define GvESTASH(gv) GvSTASH(GvEGV(gv) ? GvEGV(gv) : gv) 122 123 #define GVf_INTRO 0x01 124 #define GVf_MULTI 0x02 125 #define GVf_ASSUMECV 0x04 126 #define GVf_IN_PAD 0x08 127 #define GVf_IMPORTED 0xF0 128 #define GVf_IMPORTED_SV 0x10 129 #define GVf_IMPORTED_AV 0x20 130 #define GVf_IMPORTED_HV 0x40 131 #define GVf_IMPORTED_CV 0x80 132 133 #define GvINTRO(gv) (GvFLAGS(gv) & GVf_INTRO) 134 #define GvINTRO_on(gv) (GvFLAGS(gv) |= GVf_INTRO) 135 #define GvINTRO_off(gv) (GvFLAGS(gv) &= ~GVf_INTRO) 136 137 #define GvMULTI(gv) (GvFLAGS(gv) & GVf_MULTI) 138 #define GvMULTI_on(gv) (GvFLAGS(gv) |= GVf_MULTI) 139 #define GvMULTI_off(gv) (GvFLAGS(gv) &= ~GVf_MULTI) 140 141 #define GvASSUMECV(gv) (GvFLAGS(gv) & GVf_ASSUMECV) 142 #define GvASSUMECV_on(gv) (GvFLAGS(gv) |= GVf_ASSUMECV) 143 #define GvASSUMECV_off(gv) (GvFLAGS(gv) &= ~GVf_ASSUMECV) 144 145 #define GvIMPORTED(gv) (GvFLAGS(gv) & GVf_IMPORTED) 146 #define GvIMPORTED_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED) 147 #define GvIMPORTED_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED) 148 149 #define GvIMPORTED_SV(gv) (GvFLAGS(gv) & GVf_IMPORTED_SV) 150 #define GvIMPORTED_SV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_SV) 151 #define GvIMPORTED_SV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_SV) 152 153 #define GvIMPORTED_AV(gv) (GvFLAGS(gv) & GVf_IMPORTED_AV) 154 #define GvIMPORTED_AV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_AV) 155 #define GvIMPORTED_AV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_AV) 156 157 #define GvIMPORTED_HV(gv) (GvFLAGS(gv) & GVf_IMPORTED_HV) 158 #define GvIMPORTED_HV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_HV) 159 #define GvIMPORTED_HV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_HV) 160 161 #define GvIMPORTED_CV(gv) (GvFLAGS(gv) & GVf_IMPORTED_CV) 162 #define GvIMPORTED_CV_on(gv) (GvFLAGS(gv) |= GVf_IMPORTED_CV) 163 #define GvIMPORTED_CV_off(gv) (GvFLAGS(gv) &= ~GVf_IMPORTED_CV) 164 165 #define GvIN_PAD(gv) (GvFLAGS(gv) & GVf_IN_PAD) 166 #define GvIN_PAD_on(gv) (GvFLAGS(gv) |= GVf_IN_PAD) 167 #define GvIN_PAD_off(gv) (GvFLAGS(gv) &= ~GVf_IN_PAD) 168 169 #define GvUNIQUE(gv) 0 170 #define GvUNIQUE_on(gv) NOOP 171 #define GvUNIQUE_off(gv) NOOP 172 173 #ifdef USE_ITHREADS 174 #define GV_UNIQUE_CHECK 175 #else 176 #undef GV_UNIQUE_CHECK 177 #endif 178 179 #define Nullgv Null(GV*) 180 181 #define DM_UID 0x003 182 #define DM_RUID 0x001 183 #define DM_EUID 0x002 184 #define DM_ARRAY 0x004 185 #define DM_GID 0x030 186 #define DM_RGID 0x010 187 #define DM_EGID 0x020 188 #define DM_DELAY 0x100 189 190 /* 191 * symbol creation flags, for use in gv_fetchpv() and get_*v() 192 */ 193 #define GV_ADD 0x01 /* add, if symbol not already there 194 For gv_name_set, adding a HEK for the first 195 time, so don't try to free what's there. */ 196 #define GV_ADDMULTI 0x02 /* add, pretending it has been added already */ 197 #define GV_ADDWARN 0x04 /* add, but warn if symbol wasn't already there */ 198 #define GV_ADDINEVAL 0x08 /* add, as though we're doing so within an eval */ 199 #define GV_NOINIT 0x10 /* add, but don't init symbol, if type != PVGV */ 200 /* This is used by toke.c to avoid turing placeholder constants in the symbol 201 table into full PVGVs with attached constant subroutines. */ 202 #define GV_NOADD_NOINIT 0x20 /* Don't add the symbol if it's not there. 203 Don't init it if it is there but ! PVGV */ 204 #define GV_NOEXPAND 0x40 /* Don't expand SvOK() entries to PVGV */ 205 #define GV_NOTQUAL 0x80 /* A plain symbol name, not qualified with a 206 package (so skip checks for :: and ') */ 207 208 /* SVf_UTF8 (more accurately the return value from SvUTF8) is also valid 209 as a flag to gv_fetch_pvn_flags, so ensure it lies outside this range. 210 */ 211 212 #define GV_NOADD_MASK (SVf_UTF8|GV_NOADD_NOINIT|GV_NOEXPAND|GV_NOTQUAL) 213 /* The bit flags that don't cause gv_fetchpv() to add a symbol if not found */ 214 215 #define gv_fullname3(sv,gv,prefix) gv_fullname4(sv,gv,prefix,TRUE) 216 #define gv_efullname3(sv,gv,prefix) gv_efullname4(sv,gv,prefix,TRUE) 217 #define gv_fetchmethod(stash, name) gv_fetchmethod_autoload(stash, name, TRUE) 218 219 /* 220 * Local variables: 221 * c-indentation-style: bsd 222 * c-basic-offset: 4 223 * indent-tabs-mode: t 224 * End: 225 * 226 * ex: set ts=8 sts=4 sw=4 noet: 227 */
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