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-rw-r--r--libguile/pairs.c196
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diff --git a/libguile/pairs.c b/libguile/pairs.c
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+/* 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"
+}
+