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diff --git a/libguile/gsubr.c b/libguile/gsubr.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"
+
+
+/*
+ * gsubr.c
+ * Provide `gsubrs' -- subrs taking a prescribed number of required, optional,
+ * and rest arguments.
+ */
+
+#include "gsubr.h"
+
+#define GSUBR_TEST 1
+
+#define GSUBR_MAKTYPE(req, opt, rst) ((req)|((opt)<<4)|((rst)<<8))
+#define GSUBR_REQ(x) ((int)(x)&0xf)
+#define GSUBR_OPT(x) (((int)(x)&0xf0)>>4)
+#define GSUBR_REST(x) ((int)(x)>>8)
+
+#define GSUBR_MAX 10
+#define GSUBR_TYPE(cclo) (SCM_VELTS(cclo)[1])
+#define GSUBR_PROC(cclo) (SCM_VELTS(cclo)[2])
+
+static SCM f_gsubr_apply;
+#ifdef __STDC__
+SCM
+scm_make_gsubr(char *name, int req, int opt, int rst, SCM (*fcn)())
+#else
+SCM
+scm_make_gsubr(name, req, opt, rst, fcn)
+ char *name;
+ int req;
+ int opt;
+ int rst;
+ SCM (*fcn)();
+#endif
+{
+ switch GSUBR_MAKTYPE(req, opt, rst) {
+ case GSUBR_MAKTYPE(0, 0, 0): return scm_make_subr(name, scm_tc7_subr_0, fcn);
+ case GSUBR_MAKTYPE(1, 0, 0): return scm_make_subr(name, scm_tc7_subr_1, fcn);
+ case GSUBR_MAKTYPE(0, 1, 0): return scm_make_subr(name, scm_tc7_subr_1o, fcn);
+ case GSUBR_MAKTYPE(1, 1, 0): return scm_make_subr(name, scm_tc7_subr_2o, fcn);
+ case GSUBR_MAKTYPE(2, 0, 0): return scm_make_subr(name, scm_tc7_subr_2, fcn);
+ case GSUBR_MAKTYPE(3, 0, 0): return scm_make_subr(name, scm_tc7_subr_3, fcn);
+ case GSUBR_MAKTYPE(0, 0, 1): return scm_make_subr(name, scm_tc7_lsubr, fcn);
+ case GSUBR_MAKTYPE(2, 0, 1): return scm_make_subr(name, scm_tc7_lsubr_2, fcn);
+ default:
+ {
+ SCM symcell = scm_sysintern(name, SCM_UNDEFINED);
+ SCM z, cclo = scm_makcclo(f_gsubr_apply, 3L);
+ long tmp = ((((SCM_CELLPTR)(SCM_CAR(symcell)))-scm_heap_org)<<8);
+ if (GSUBR_MAX < req + opt + rst) {
+ fputs("ERROR in scm_make_gsubr: too many args\n", stderr);
+ exit (1);
+ }
+ if ((tmp>>8) != ((SCM_CELLPTR)(SCM_CAR(symcell))-scm_heap_org))
+ tmp = 0;
+ SCM_NEWCELL(z);
+ SCM_SUBRF(z) = fcn;
+ SCM_CAR(z) = tmp + scm_tc7_subr_0;
+ GSUBR_PROC(cclo) = z;
+ GSUBR_TYPE(cclo) = SCM_MAKINUM(GSUBR_MAKTYPE(req, opt, rst));
+ SCM_CDR(symcell) = cclo;
+ return cclo;
+ }
+ }
+}
+
+
+SCM_PROC(s_gsubr_apply, "gsubr-apply", 0, 0, 1, scm_gsubr_apply);
+#ifdef __STDC__
+SCM
+scm_gsubr_apply(SCM args)
+#else
+SCM
+scm_gsubr_apply(args)
+ SCM args;
+#endif
+{
+ SCM self = SCM_CAR(args);
+ SCM (*fcn)() = SCM_SUBRF(GSUBR_PROC(self));
+ SCM v[10]; /* must agree with greatest supported arity */
+ int typ = SCM_INUM(GSUBR_TYPE(self));
+ int i, n = GSUBR_REQ(typ) + GSUBR_OPT(typ) + GSUBR_REST(typ);
+ args = SCM_CDR(args);
+ for (i = 0; i < GSUBR_REQ(typ); i++) {
+#ifndef RECKLESS
+ if (SCM_IMP(args))
+ scm_wta(SCM_UNDEFINED, (char *)SCM_WNA, SCM_CHARS(SCM_SNAME(GSUBR_PROC(self))));
+#endif
+ v[i] = SCM_CAR(args);
+ args = SCM_CDR(args);
+ }
+ for (; i < GSUBR_REQ(typ) + GSUBR_OPT(typ); i++) {
+ if (SCM_NIMP(args)) {
+ v[i] = SCM_CAR(args);
+ args = SCM_CDR(args);
+ }
+ else
+ v[i] = SCM_UNDEFINED;
+ }
+ if (GSUBR_REST(typ))
+ v[i] = args;
+ switch (n) {
+ default: scm_wta(self, "internal programming error", s_gsubr_apply);
+ case 2: return (*fcn)(v[0], v[1]);
+ case 3: return (*fcn)(v[0], v[1], v[2]);
+ case 4: return (*fcn)(v[0], v[1], v[2], v[3]);
+ case 5: return (*fcn)(v[0], v[1], v[2], v[3], v[4]);
+ case 6: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5]);
+ case 7: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6]);
+ case 8: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]);
+ case 9: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8]);
+ case 10: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8], v[9]);
+ }
+}
+
+
+#ifdef GSUBR_TEST
+/* A silly example, taking 2 required args, 1 optional, and
+ a scm_list of rest args
+ */
+SCM
+gsubr_21l(req1, req2, opt, rst)
+ SCM req1, req2, opt, rst;
+{
+ scm_gen_puts (scm_regular_string, "gsubr-2-1-l:\n req1: ", scm_cur_outp);
+ scm_display(req1, scm_cur_outp);
+ scm_gen_puts (scm_regular_string, "\n req2: ", scm_cur_outp);
+ scm_display(req2, scm_cur_outp);
+ scm_gen_puts (scm_regular_string, "\n opt: ", scm_cur_outp);
+ scm_display(opt, scm_cur_outp);
+ scm_gen_puts (scm_regular_string, "\n rest: ", scm_cur_outp);
+ scm_display(rst, scm_cur_outp);
+ scm_newline(scm_cur_outp);
+ return SCM_UNSPECIFIED;
+}
+#endif
+
+
+#ifdef __STDC__
+void
+scm_init_gsubr(void)
+#else
+void
+scm_init_gsubr()
+#endif
+{
+ f_gsubr_apply = scm_make_subr(s_gsubr_apply, scm_tc7_lsubr, scm_gsubr_apply);
+#ifdef GSUBR_TEST
+ scm_make_gsubr("gsubr-2-1-l", 2, 1, 1, gsubr_21l); /* example */
+#endif
+}