Import Upstream version 4e6upstream/4e6

1 files changed, 138 insertions, 0 deletions

diff --git a/gsubr.c b/gsubr.c
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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);
+}