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Diffstat (limited to 'libguile/pairs.c')
-rw-r--r-- | libguile/pairs.c | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/libguile/pairs.c b/libguile/pairs.c new file mode 100644 index 000000000..26cd3da1f --- /dev/null +++ b/libguile/pairs.c @@ -0,0 +1,196 @@ +/* Copyright (C) 1995,1996 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" + +#ifdef __STDC__ +#include <stdarg.h> +#define var_start(x, y) va_start(x, y) +#else +#include <varargs.h> +#define var_start(x, y) va_start(x) +#endif + + + + +/* {Pairs} + */ + +SCM_PROC(s_cons, "cons", 2, 0, 0, scm_cons); +#ifdef __STDC__ +SCM +scm_cons (SCM x, SCM y) +#else +SCM +scm_cons (x, y) + SCM x; + SCM y; +#endif +{ + register SCM z; + SCM_NEWCELL (z); + SCM_CAR (z) = x; + SCM_CDR (z) = y; + return z; +} + +#ifdef __STDC__ +SCM +scm_cons2 (SCM w, SCM x, SCM y) +#else +SCM +scm_cons2 (w, x, y) + SCM w; + SCM x; + SCM y; +#endif +{ + register SCM z; + SCM_NEWCELL (z); + SCM_CAR (z) = x; + SCM_CDR (z) = y; + x = z; + SCM_NEWCELL (z); + SCM_CAR (z) = w; + SCM_CDR (z) = x; + return z; +} + + +SCM_PROC(s_pair_p, "pair?", 1, 0, 0, scm_pair_p); +#ifdef __STDC__ +SCM +scm_pair_p(SCM x) +#else +SCM +scm_pair_p(x) + SCM x; +#endif +{ + if SCM_IMP(x) return SCM_BOOL_F; + return SCM_CONSP(x) ? SCM_BOOL_T : SCM_BOOL_F; +} + +SCM_PROC(s_set_car_x, "set-car!", 2, 0, 0, scm_set_car_x); +#ifdef __STDC__ +SCM +scm_set_car_x(SCM pair, SCM value) +#else +SCM +scm_set_car_x(pair, value) + SCM pair; + SCM value; +#endif +{ + SCM_ASSERT(SCM_NIMP(pair) && SCM_CONSP(pair), pair, SCM_ARG1, s_set_car_x); + SCM_CAR(pair) = value; + return value; +} + +SCM_PROC(s_set_cdr_x, "set-cdr!", 2, 0, 0, scm_set_cdr_x); +#ifdef __STDC__ +SCM +scm_set_cdr_x(SCM pair, SCM value) +#else +SCM +scm_set_cdr_x(pair, value) + SCM pair; + SCM value; +#endif +{ + SCM_ASSERT(SCM_NIMP(pair) && SCM_CONSP(pair), pair, SCM_ARG1, s_set_cdr_x); + SCM_CDR(pair) = value; + return value; +} + + + + +static scm_iproc cxrs[] = +{ + {"car", 0}, + {"cdr", 0}, + {"caar", 0}, + {"cadr", 0}, + {"cdar", 0}, + {"cddr", 0}, + {"caaar", 0}, + {"caadr", 0}, + {"cadar", 0}, + {"caddr", 0}, + {"cdaar", 0}, + {"cdadr", 0}, + {"cddar", 0}, + {"cdddr", 0}, + {"caaaar", 0}, + {"caaadr", 0}, + {"caadar", 0}, + {"caaddr", 0}, + {"cadaar", 0}, + {"cadadr", 0}, + {"caddar", 0}, + {"cadddr", 0}, + {"cdaaar", 0}, + {"cdaadr", 0}, + {"cdadar", 0}, + {"cdaddr", 0}, + {"cddaar", 0}, + {"cddadr", 0}, + {"cdddar", 0}, + {"cddddr", 0}, + {0, 0} +}; + + +#ifdef __STDC__ +void +scm_init_pairs (void) +#else +void +scm_init_pairs () +#endif +{ + scm_init_iprocs(cxrs, scm_tc7_cxr); +#include "pairs.x" +} + |