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/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2006 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include "libguile/_scm.h"
#include "libguile/procprop.h"
#include "libguile/root.h"
#include "libguile/gsubr.h"
#include "libguile/deprecation.h"
/*
* gsubr.c
* Provide `gsubrs' -- subrs taking a prescribed number of required, optional,
* and rest arguments.
*/
/* #define GSUBR_TEST */
SCM_GLOBAL_SYMBOL (scm_sym_name, "name");
SCM scm_f_gsubr_apply;
static SCM
create_gsubr (int define, const char *name,
int req, int opt, int rst, SCM (*fcn)())
{
SCM subr;
switch (SCM_GSUBR_MAKTYPE (req, opt, rst))
{
case SCM_GSUBR_MAKTYPE(0, 0, 0):
subr = scm_c_make_subr (name, scm_tc7_subr_0, fcn);
goto create_subr;
case SCM_GSUBR_MAKTYPE(1, 0, 0):
subr = scm_c_make_subr (name, scm_tc7_subr_1, fcn);
goto create_subr;
case SCM_GSUBR_MAKTYPE(0, 1, 0):
subr = scm_c_make_subr (name, scm_tc7_subr_1o, fcn);
goto create_subr;
case SCM_GSUBR_MAKTYPE(1, 1, 0):
subr = scm_c_make_subr (name, scm_tc7_subr_2o, fcn);
goto create_subr;
case SCM_GSUBR_MAKTYPE(2, 0, 0):
subr = scm_c_make_subr (name, scm_tc7_subr_2, fcn);
goto create_subr;
case SCM_GSUBR_MAKTYPE(3, 0, 0):
subr = scm_c_make_subr (name, scm_tc7_subr_3, fcn);
goto create_subr;
case SCM_GSUBR_MAKTYPE(0, 0, 1):
subr = scm_c_make_subr (name, scm_tc7_lsubr, fcn);
goto create_subr;
case SCM_GSUBR_MAKTYPE(2, 0, 1):
subr = scm_c_make_subr (name, scm_tc7_lsubr_2, fcn);
create_subr:
if (define)
scm_define (SCM_SUBR_ENTRY(subr).name, subr);
return subr;
default:
{
SCM cclo = scm_makcclo (scm_f_gsubr_apply, 3L);
SCM subr = scm_c_make_subr (name, scm_tc7_subr_0, fcn);
SCM sym = SCM_SUBR_ENTRY(subr).name;
if (SCM_GSUBR_MAX < req + opt + rst)
{
fprintf (stderr,
"ERROR in scm_c_make_gsubr: too many args (%d) to %s\n",
req + opt + rst, name);
exit (1);
}
SCM_SET_GSUBR_PROC (cclo, subr);
SCM_SET_GSUBR_TYPE (cclo,
scm_from_int (SCM_GSUBR_MAKTYPE (req, opt, rst)));
if (SCM_REC_PROCNAMES_P)
scm_set_procedure_property_x (cclo, scm_sym_name, sym);
if (define)
scm_define (sym, cclo);
return cclo;
}
}
}
SCM
scm_c_make_gsubr (const char *name, int req, int opt, int rst, SCM (*fcn)())
{
return create_gsubr (0, name, req, opt, rst, fcn);
}
SCM
scm_c_define_gsubr (const char *name, int req, int opt, int rst, SCM (*fcn)())
{
return create_gsubr (1, name, req, opt, rst, fcn);
}
static SCM
create_gsubr_with_generic (int define,
const char *name,
int req,
int opt,
int rst,
SCM (*fcn)(),
SCM *gf)
{
SCM subr;
switch (SCM_GSUBR_MAKTYPE(req, opt, rst))
{
case SCM_GSUBR_MAKTYPE(0, 0, 0):
subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_0, fcn, gf);
goto create_subr;
case SCM_GSUBR_MAKTYPE(1, 0, 0):
subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_1, fcn, gf);
goto create_subr;
case SCM_GSUBR_MAKTYPE(0, 1, 0):
subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_1o, fcn, gf);
goto create_subr;
case SCM_GSUBR_MAKTYPE(1, 1, 0):
subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_2o, fcn, gf);
goto create_subr;
case SCM_GSUBR_MAKTYPE(2, 0, 0):
subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_2, fcn, gf);
goto create_subr;
case SCM_GSUBR_MAKTYPE(3, 0, 0):
subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_3, fcn, gf);
goto create_subr;
case SCM_GSUBR_MAKTYPE(0, 0, 1):
subr = scm_c_make_subr_with_generic (name, scm_tc7_lsubr, fcn, gf);
goto create_subr;
case SCM_GSUBR_MAKTYPE(2, 0, 1):
subr = scm_c_make_subr_with_generic (name, scm_tc7_lsubr_2, fcn, gf);
create_subr:
if (define)
scm_define (SCM_SUBR_ENTRY(subr).name, subr);
return subr;
default:
;
}
scm_misc_error ("scm_c_make_gsubr_with_generic",
"can't make primitive-generic with this arity",
SCM_EOL);
return SCM_BOOL_F; /* never reached */
}
SCM
scm_c_make_gsubr_with_generic (const char *name,
int req,
int opt,
int rst,
SCM (*fcn)(),
SCM *gf)
{
return create_gsubr_with_generic (0, name, req, opt, rst, fcn, gf);
}
SCM
scm_c_define_gsubr_with_generic (const char *name,
int req,
int opt,
int rst,
SCM (*fcn)(),
SCM *gf)
{
return create_gsubr_with_generic (1, name, req, opt, rst, fcn, gf);
}
SCM
scm_gsubr_apply (SCM args)
#define FUNC_NAME "scm_gsubr_apply"
{
SCM self = SCM_CAR (args);
SCM (*fcn)() = SCM_SUBRF (SCM_GSUBR_PROC (self));
SCM v[SCM_GSUBR_MAX];
int typ = scm_to_int (SCM_GSUBR_TYPE (self));
long i, n = SCM_GSUBR_REQ (typ) + SCM_GSUBR_OPT (typ) + SCM_GSUBR_REST (typ);
#if 0
if (n > SCM_GSUBR_MAX)
scm_misc_error (FUNC_NAME,
"Function ~S has illegal arity ~S.",
scm_list_2 (self, scm_from_int (n)));
#endif
args = SCM_CDR (args);
for (i = 0; i < SCM_GSUBR_REQ (typ); i++) {
if (scm_is_null (args))
scm_wrong_num_args (SCM_SNAME (SCM_GSUBR_PROC (self)));
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 if (!scm_is_null (args))
scm_wrong_num_args (SCM_SNAME (SCM_GSUBR_PROC (self)));
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 SCM_BOOL_F; /* Never reached. */
}
#undef FUNC_NAME
#ifdef GSUBR_TEST
/* A silly example, taking 2 required args, 1 optional, and
a scm_list of rest args
*/
SCM
gsubr_21l(SCM req1, SCM req2, SCM opt, SCM 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_c_make_subr ("gsubr-apply", scm_tc7_lsubr,
scm_gsubr_apply);
#ifdef GSUBR_TEST
scm_c_define_gsubr ("gsubr-2-1-l", 2, 1, 1, gsubr_21l); /* example */
#endif
#include "libguile/gsubr.x"
}
/*
Local Variables:
c-file-style: "gnu"
End:
*/
|
