diff options
Diffstat (limited to 'libguile/tag.c')
| -rw-r--r-- | libguile/tag.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/libguile/tag.c b/libguile/tag.c new file mode 100644 index 000000000..a305d70b2 --- /dev/null +++ b/libguile/tag.c @@ -0,0 +1,220 @@ +/* Copyright (C) 1996 Free Software Foundation, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + * As a special exception, the Free Software Foundation gives permission + * for additional uses of the text contained in its release of GUILE. + * + * The exception is that, if you link the GUILE library with other files + * to produce an executable, this does not by itself cause the + * resulting executable to be covered by the GNU General Public License. + * Your use of that executable is in no way restricted on account of + * linking the GUILE library code into it. + * + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + * + * This exception applies only to the code released by the + * Free Software Foundation under the name GUILE. If you copy + * code from other Free Software Foundation releases into a copy of + * GUILE, as the General Public License permits, the exception does + * not apply to the code that you add in this way. To avoid misleading + * anyone as to the status of such modified files, you must delete + * this exception notice from them. + * + * If you write modifications of your own for GUILE, it is your choice + * whether to permit this exception to apply to your modifications. + * If you do not wish that, delete this exception notice. + */ + +#include <stdio.h> +#include "_scm.h" + + + +SCM_CONST_LONG (scm_utag_immediate_integer, "utag_immediate_integer", 0); +SCM_CONST_LONG (scm_utag_immediate_char, "utag_immediate_char", 1); +SCM_CONST_LONG (scm_utag_pair, "utag_pair", 2); +SCM_CONST_LONG (scm_utag_closure, "utag_closure", 3); +SCM_CONST_LONG (scm_utag_symbol, "utag_symbol", 4); +SCM_CONST_LONG (scm_utag_vector, "utag_vector", 5); +SCM_CONST_LONG (scm_utag_wvect, "utag_wvect", 6); +SCM_CONST_LONG (scm_utag_bvect, "utag_bvect", 7); +SCM_CONST_LONG (scm_utag_byvect, "utag_byvect", 8); +SCM_CONST_LONG (scm_utag_svect, "utag_svect", 9); +SCM_CONST_LONG (scm_utag_ivect, "utag_ivect", 10); +SCM_CONST_LONG (scm_utag_uvect, "utag_uvect", 11); +SCM_CONST_LONG (scm_utag_fvect, "utag_fvect", 12); +SCM_CONST_LONG (scm_utag_dvect, "utag_dvect", 13); +SCM_CONST_LONG (scm_utag_cvect, "utag_cvect", 14); +SCM_CONST_LONG (scm_utag_string, "utag_string", 15); +SCM_CONST_LONG (scm_utag_mb_string, "utag_mb_string", 16); +SCM_CONST_LONG (scm_utag_substring, "utag_substring", 17); +SCM_CONST_LONG (scm_utag_mb_substring, "utag_mb_substring", 18); +SCM_CONST_LONG (scm_utag_asubr, "utag_asubr", 19); +SCM_CONST_LONG (scm_utag_subr_0, "utag_subr_0", 20); +SCM_CONST_LONG (scm_utag_subr_1, "utag_subr_1", 21); +SCM_CONST_LONG (scm_utag_cxr, "utag_cxr", 22); +SCM_CONST_LONG (scm_utag_subr_3, "utag_subr_3", 23); +SCM_CONST_LONG (scm_utag_subr_2, "utag_subr_2", 24); +SCM_CONST_LONG (scm_utag_rpsubr, "utag_rpsubr", 25); +SCM_CONST_LONG (scm_utag_subr_1o, "utag_subr_1o", 26); +SCM_CONST_LONG (scm_utag_subr_2o, "utag_subr_2o", 27); +SCM_CONST_LONG (scm_utag_lsubr_2, "utag_lsubr_2", 28); +SCM_CONST_LONG (scm_utag_lsubr, "utag_lsubr", 29); +SCM_CONST_LONG (scm_utag_smob_base, "utag_smob_base", 252); +SCM_CONST_LONG (scm_utag_port_base, "utag_port_base", 253); +SCM_CONST_LONG (scm_utag_flag_base, "utag_flag_base", 254); +SCM_CONST_LONG (scm_utag_struct_base, "utag_struct_base", 255); + + +SCM_PROC (s_tag, "tag", 1, 0, 0, scm_tag); +#ifdef __STDC__ +SCM +scm_tag (SCM x) +#else +SCM +scm_tag (x) + SCM x; +#endif +{ + switch (SCM_ITAG3 (x)) + { + case scm_tc3_int_1: + case scm_tc3_int_2: + return SCM_CDR (scm_utag_immediate_integer) ; + + case scm_tc3_imm24: + if (SCM_ICHRP (x)) + return SCM_CDR (scm_utag_immediate_char) ; + else + { + int tag; + tag = SCM_MAKINUM ((x >> 8) & 0xff); + return SCM_MAKINUM (SCM_INUM (SCM_CDR (scm_utag_flag_base) ) | (tag << 8)); + } + + case scm_tc3_cons: + switch (SCM_TYP7 (x)) + { + case scm_tcs_cons_nimcar: + return SCM_CDR (scm_utag_pair) ; + case scm_tcs_closures: + return SCM_CDR (scm_utag_closure) ; + case scm_tcs_symbols: + return SCM_CDR (scm_utag_symbol) ; + case scm_tc7_vector: + return SCM_CDR (scm_utag_vector) ; + case scm_tc7_wvect: + return SCM_CDR (scm_utag_wvect) ; + case scm_tc7_bvect: + return SCM_CDR (scm_utag_bvect) ; + case scm_tc7_byvect: + return SCM_CDR (scm_utag_byvect) ; + case scm_tc7_svect: + return SCM_CDR (scm_utag_svect) ; + case scm_tc7_ivect: + return SCM_CDR (scm_utag_ivect) ; + case scm_tc7_uvect: + return SCM_CDR (scm_utag_uvect) ; + case scm_tc7_fvect: + return SCM_CDR (scm_utag_fvect) ; + case scm_tc7_dvect: + return SCM_CDR (scm_utag_dvect) ; + case scm_tc7_cvect: + return SCM_CDR (scm_utag_cvect) ; + case scm_tc7_string: + return SCM_CDR (scm_utag_string) ; + case scm_tc7_mb_string: + return SCM_CDR (scm_utag_mb_string) ; + case scm_tc7_substring: + return SCM_CDR (scm_utag_substring) ; + case scm_tc7_mb_substring: + return SCM_CDR (scm_utag_mb_substring) ; + case scm_tc7_asubr: + return SCM_CDR (scm_utag_asubr) ; + case scm_tc7_subr_0: + return SCM_CDR (scm_utag_subr_0) ; + case scm_tc7_subr_1: + return SCM_CDR (scm_utag_subr_1) ; + case scm_tc7_cxr: + return SCM_CDR (scm_utag_cxr) ; + case scm_tc7_subr_3: + return SCM_CDR (scm_utag_subr_3) ; + case scm_tc7_subr_2: + return SCM_CDR (scm_utag_subr_2) ; + case scm_tc7_rpsubr: + return SCM_CDR (scm_utag_rpsubr) ; + case scm_tc7_subr_1o: + return SCM_CDR (scm_utag_subr_1o) ; + case scm_tc7_subr_2o: + return SCM_CDR (scm_utag_subr_2o) ; + case scm_tc7_lsubr_2: + return SCM_CDR (scm_utag_lsubr_2) ; + case scm_tc7_lsubr: + return SCM_CDR (scm_utag_lsubr) ; + + case scm_tc7_port: + { + int tag; + tag = (SCM_TYP16 (x) >> 8) & 0xff; + return SCM_MAKINUM (SCM_INUM (SCM_CDR (scm_utag_port_base)) | (tag << 8)); + } + case scm_tc7_smob: + { + int tag; + tag = (SCM_TYP16 (x) >> 8) & 0xff; + return SCM_MAKINUM (SCM_INUM (SCM_CDR (scm_utag_smob_base)) | (tag << 8)); + } + case scm_tcs_cons_gloc: + /* must be a struct */ + { + int tag; + tag = SCM_STRUCT_VTABLE_DATA (x)[scm_struct_i_tag]; + return SCM_MAKINUM (SCM_INUM (SCM_CDR (scm_utag_struct_base)) | (tag << 8)); + } + return SCM_CDR (scm_utag_struct_base) ; + + default: + if (SCM_CONSP (x)) + return SCM_CDR (scm_utag_pair); + else + return SCM_MAKINUM (-1); + } + + case scm_tc3_cons_gloc: + case scm_tc3_tc7_1: + case scm_tc3_tc7_2: + case scm_tc3_closure: + /* Never reached */ + break; + } + return SCM_MAKINUM (-1); +} + + + + +#ifdef __STDC__ +void +scm_init_tag (void) +#else +void +scm_init_tag () +#endif +{ +#include "tag.x" +} + |