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authorBryan Newbold <bnewbold@robocracy.org>2017-02-20 00:05:23 -0800
committerBryan Newbold <bnewbold@robocracy.org>2017-02-20 00:05:23 -0800
commit5ca6e8e6a4e5c022a6fb5d28f30219c22c99eda8 (patch)
tree9b744b9dbf39e716e56daa620e2f3041968caf19 /gsubr.c
downloadscm-5ca6e8e6a4e5c022a6fb5d28f30219c22c99eda8.tar.gz
scm-5ca6e8e6a4e5c022a6fb5d28f30219c22c99eda8.zip
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+/* Copyright (C) 1994, 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.
+ */
+
+/* "gsubr.c" CCLOs taking general number of required, optional, and rest args.
+ Author: Radey Shouman */
+
+#include "scm.h"
+
+#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) (VELTS(cclo)[1])
+#define GSUBR_PROC(cclo) (VELTS(cclo)[2])
+
+static SCM f_gsubr_apply;
+SCM make_gsubr(name, req, opt, rst, fcn)
+ char *name;
+ int req, opt, rst;
+ SCM (*fcn)();
+{
+ switch GSUBR_MAKTYPE(req, opt, rst) {
+ case GSUBR_MAKTYPE(0, 0, 0): return make_subr(name, tc7_subr_0, fcn);
+ case GSUBR_MAKTYPE(1, 0, 0): return make_subr(name, tc7_subr_1, fcn);
+ case GSUBR_MAKTYPE(0, 1, 0): return make_subr(name, tc7_subr_1o, fcn);
+ case GSUBR_MAKTYPE(1, 1, 0): return make_subr(name, tc7_subr_2o, fcn);
+ case GSUBR_MAKTYPE(2, 0, 0): return make_subr(name, tc7_subr_2, fcn);
+ case GSUBR_MAKTYPE(3, 0, 0): return make_subr(name, tc7_subr_3, fcn);
+ case GSUBR_MAKTYPE(0, 0, 1): return make_subr(name, tc7_lsubr, fcn);
+ case GSUBR_MAKTYPE(2, 0, 1): return make_subr(name, tc7_lsubr_2, fcn);
+ default:
+ {
+ SCM symcell = sysintern(name, UNDEFINED);
+ SCM z, cclo = makcclo(f_gsubr_apply, 3L);
+ long tmp = ((((CELLPTR)(CAR(symcell)))-heap_org)<<8);
+ ASSERT(GSUBR_MAX >= req + opt + rst, MAKINUM(req + opt + rst),
+ OUTOFRANGE, "make_gsubr");
+ if ((tmp>>8) != ((CELLPTR)(CAR(symcell))-heap_org))
+ tmp = 0;
+ NEWCELL(z);
+ SUBRF(z) = fcn;
+ CAR(z) = tmp + tc7_subr_0;
+ GSUBR_PROC(cclo) = z;
+ GSUBR_TYPE(cclo) = MAKINUM(GSUBR_MAKTYPE(req, opt, rst));
+ CDR(symcell) = cclo;
+ return cclo;
+ }
+ }
+}
+
+char s_gsubr_apply[] = " gsubr-apply";
+SCM gsubr_apply(args)
+ SCM args;
+{
+ SCM self = CAR(args);
+ SCM (*fcn)() = SUBRF(GSUBR_PROC(self));
+ int typ = INUM(GSUBR_TYPE(self));
+ int i, n = GSUBR_REQ(typ) + GSUBR_OPT(typ) + GSUBR_REST(typ);
+ SCM v[10];
+ if (n > 10) wta(self, "internal programming error", s_gsubr_apply);
+ args = CDR(args);
+ for (i = 0; i < GSUBR_REQ(typ); i++) {
+#ifndef RECKLESS
+ if IMP(args)
+ wnargs: wta(UNDEFINED, (char *)WNA, CHARS(SNAME(GSUBR_PROC(self))));
+#endif
+ v[i] = CAR(args);
+ args = CDR(args);
+ }
+ for (; i < GSUBR_REQ(typ) + GSUBR_OPT(typ); i++) {
+ if NIMP(args) {
+ v[i] = CAR(args);
+ args = CDR(args);
+ }
+ else
+ v[i] = UNDEFINED;
+ }
+ if GSUBR_REST(typ)
+ v[i] = args;
+ else
+ ASRTGO(NULLP(args), wnargs);
+ switch (n) {
+ 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]);
+ }
+}
+
+void init_gsubr()
+{
+ f_gsubr_apply = make_subr(s_gsubr_apply, tc7_lsubr, gsubr_apply);
+}