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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, 59 Temple Place, Suite 330, Boston, MA 02111, USA.
*
* As a special exception, the Free Software Foundation gives permission
* for additional uses of the text contained in its release of SCM.
*
* The exception is that, if you link the SCM 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 SCM 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 SCM. If you copy
* code from other Free Software Foundation releases into a copy of
* SCM, 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 SCM, 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)
const 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 = scm_maksubr(name, tc7_subr_0, fcn);
SCM cclo = makcclo(f_gsubr_apply, 3L);
ASSERT(GSUBR_MAX >= req + opt + rst, MAKINUM(req + opt + rst),
OUTOFRANGE, "make_gsubr");
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, 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);
add_feature("generalized-c-arguments");
}
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