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/* Copyright (C) 1995,1996,1997,1998, 1999 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, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 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"
#include "genio.h"
#include "procprop.h"
#include "gsubr.h"
/*
* gsubr.c
* Provide `gsubrs' -- subrs taking a prescribed number of required, optional,
* and rest arguments.
*/
/* #define GSUBR_TEST */
SCM scm_sym_name;
SCM scm_f_gsubr_apply;
SCM
scm_make_gsubr(name, req, opt, rst, fcn)
const char *name;
int req;
int opt;
int rst;
SCM (*fcn)();
{
switch SCM_GSUBR_MAKTYPE(req, opt, rst) {
case SCM_GSUBR_MAKTYPE(0, 0, 0): return scm_make_subr(name, scm_tc7_subr_0, fcn);
case SCM_GSUBR_MAKTYPE(1, 0, 0): return scm_make_subr(name, scm_tc7_subr_1, fcn);
case SCM_GSUBR_MAKTYPE(0, 1, 0): return scm_make_subr(name, scm_tc7_subr_1o, fcn);
case SCM_GSUBR_MAKTYPE(1, 1, 0): return scm_make_subr(name, scm_tc7_subr_2o, fcn);
case SCM_GSUBR_MAKTYPE(2, 0, 0): return scm_make_subr(name, scm_tc7_subr_2, fcn);
case SCM_GSUBR_MAKTYPE(3, 0, 0): return scm_make_subr(name, scm_tc7_subr_3, fcn);
case SCM_GSUBR_MAKTYPE(0, 0, 1): return scm_make_subr(name, scm_tc7_lsubr, fcn);
case SCM_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(scm_f_gsubr_apply, 3L);
long tmp = ((((SCM_CELLPTR)(SCM_CAR(symcell)))-scm_heap_org)<<8);
if (SCM_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_SETCAR (z, tmp + scm_tc7_subr_0);
SCM_GSUBR_PROC(cclo) = z;
SCM_GSUBR_TYPE(cclo) = SCM_MAKINUM(SCM_GSUBR_MAKTYPE(req, opt, rst));
SCM_SETCDR (symcell, cclo);
#ifdef DEBUG_EXTENSIONS
if (SCM_REC_PROCNAMES_P)
scm_set_procedure_property_x (cclo, scm_sym_name, SCM_CAR (symcell));
#endif
return cclo;
}
}
}
SCM
scm_make_gsubr_with_generic (const char *name,
int req,
int opt,
int rst,
SCM (*fcn)(),
SCM *gf)
{
switch SCM_GSUBR_MAKTYPE(req, opt, rst) {
case SCM_GSUBR_MAKTYPE(0, 0, 0):
return scm_make_subr_with_generic(name, scm_tc7_subr_0, fcn, gf);
case SCM_GSUBR_MAKTYPE(1, 0, 0):
return scm_make_subr_with_generic(name, scm_tc7_subr_1, fcn, gf);
case SCM_GSUBR_MAKTYPE(0, 1, 0):
return scm_make_subr_with_generic(name, scm_tc7_subr_1o, fcn, gf);
case SCM_GSUBR_MAKTYPE(1, 1, 0):
return scm_make_subr_with_generic(name, scm_tc7_subr_2o, fcn, gf);
case SCM_GSUBR_MAKTYPE(2, 0, 0):
return scm_make_subr_with_generic(name, scm_tc7_subr_2, fcn, gf);
case SCM_GSUBR_MAKTYPE(3, 0, 0):
return scm_make_subr_with_generic(name, scm_tc7_subr_3, fcn, gf);
case SCM_GSUBR_MAKTYPE(0, 0, 1):
return scm_make_subr_with_generic(name, scm_tc7_lsubr, fcn, gf);
case SCM_GSUBR_MAKTYPE(2, 0, 1):
return scm_make_subr_with_generic(name, scm_tc7_lsubr_2, fcn, gf);
default:
;
}
scm_misc_error ("scm_make_gsubr_with_generic",
"can't make primitive-generic with this arity",
SCM_EOL);
return 0; /* never reached */
}
SCM_PROC(s_gsubr_apply, "gsubr-apply", 0, 0, 1, scm_gsubr_apply);
SCM
scm_gsubr_apply(args)
SCM args;
{
SCM self = SCM_CAR(args);
SCM (*fcn)() = SCM_SUBRF(SCM_GSUBR_PROC(self));
SCM v[10]; /* must agree with greatest supported arity */
int typ = SCM_INUM(SCM_GSUBR_TYPE(self));
int i, n = SCM_GSUBR_REQ(typ) + SCM_GSUBR_OPT(typ) + SCM_GSUBR_REST(typ);
#if 0
SCM_ASSERT(n <= sizeof(v)/sizeof(SCM),
self, "internal programming error", s_gsubr_apply);
#endif
args = SCM_CDR(args);
for (i = 0; i < SCM_GSUBR_REQ(typ); i++) {
#ifndef SCM_RECKLESS
if (SCM_IMP(args))
wnargs: scm_wrong_num_args (SCM_SNAME(SCM_GSUBR_PROC(self)));
#endif
v[i] = SCM_CAR(args);
args = SCM_CDR(args);
}
for (; i < SCM_GSUBR_REQ(typ) + SCM_GSUBR_OPT(typ); i++) {
if (SCM_NIMP(args)) {
v[i] = SCM_CAR(args);
args = SCM_CDR(args);
}
else
v[i] = SCM_UNDEFINED;
}
if (SCM_GSUBR_REST(typ))
v[i] = args;
else
SCM_ASRTGO(SCM_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]);
}
return 0; /* Never reached. */
}
#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_puts ("gsubr-2-1-l:\n req1: ", scm_cur_outp);
scm_display(req1, scm_cur_outp);
scm_puts ("\n req2: ", scm_cur_outp);
scm_display(req2, scm_cur_outp);
scm_puts ("\n opt: ", scm_cur_outp);
scm_display(opt, scm_cur_outp);
scm_puts ("\n rest: ", scm_cur_outp);
scm_display(rst, scm_cur_outp);
scm_newline(scm_cur_outp);
return SCM_UNSPECIFIED;
}
#endif
void
scm_init_gsubr()
{
scm_f_gsubr_apply = scm_make_subr(s_gsubr_apply, scm_tc7_lsubr, scm_gsubr_apply);
scm_sym_name = SCM_CAR (scm_sysintern ("name", SCM_UNDEFINED));
scm_permanent_object (scm_sym_name);
#ifdef GSUBR_TEST
scm_make_gsubr("gsubr-2-1-l", 2, 1, 1, gsubr_21l); /* example */
#endif
}
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