mirror of
https://git.savannah.gnu.org/git/guile.git
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220 lines
7.5 KiB
C
220 lines
7.5 KiB
C
/* Copyright (C) 1995,1996,1997,1998, 1999, 2000, 2002 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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#include <stdio.h>
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#include "libguile/_scm.h"
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#include "libguile/procprop.h"
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#include "libguile/root.h"
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#include "libguile/vectors.h"
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#include "libguile/gsubr.h"
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/*
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* gsubr.c
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* Provide `gsubrs' -- subrs taking a prescribed number of required, optional,
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* and rest arguments.
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*/
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/* #define GSUBR_TEST */
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SCM scm_sym_name;
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SCM scm_f_gsubr_apply;
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SCM
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scm_make_gsubr(const char *name,int req,int opt,int rst,SCM (*fcn)())
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{
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switch SCM_GSUBR_MAKTYPE(req, opt, rst) {
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case SCM_GSUBR_MAKTYPE(0, 0, 0): return scm_make_subr(name, scm_tc7_subr_0, fcn);
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case SCM_GSUBR_MAKTYPE(1, 0, 0): return scm_make_subr(name, scm_tc7_subr_1, fcn);
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case SCM_GSUBR_MAKTYPE(0, 1, 0): return scm_make_subr(name, scm_tc7_subr_1o, fcn);
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case SCM_GSUBR_MAKTYPE(1, 1, 0): return scm_make_subr(name, scm_tc7_subr_2o, fcn);
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case SCM_GSUBR_MAKTYPE(2, 0, 0): return scm_make_subr(name, scm_tc7_subr_2, fcn);
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case SCM_GSUBR_MAKTYPE(3, 0, 0): return scm_make_subr(name, scm_tc7_subr_3, fcn);
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case SCM_GSUBR_MAKTYPE(0, 0, 1): return scm_make_subr(name, scm_tc7_lsubr, fcn);
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case SCM_GSUBR_MAKTYPE(2, 0, 1): return scm_make_subr(name, scm_tc7_lsubr_2, fcn);
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default:
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{
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SCM symcell = scm_sysintern (name, SCM_UNDEFINED);
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SCM cclo = scm_makcclo (scm_f_gsubr_apply, 3L);
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if (SCM_GSUBR_MAX < req + opt + rst) {
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fprintf (stderr,
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"ERROR in scm_c_make_gsubr: too many args (%d) to %s\n",
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req + opt + rst, name);
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exit (1);
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}
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SCM_GSUBR_PROC (cclo) = scm_make_subr_opt (name, scm_tc7_subr_0, fcn, 0);
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SCM_GSUBR_TYPE (cclo) = SCM_MAKINUM (SCM_GSUBR_MAKTYPE (req, opt, rst));
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SCM_SETCDR (symcell, cclo);
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#ifdef DEBUG_EXTENSIONS
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if (SCM_REC_PROCNAMES_P)
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scm_set_procedure_property_x (cclo, scm_sym_name, SCM_CAR (symcell));
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#endif
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return cclo;
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}
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}
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}
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SCM
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scm_make_gsubr_with_generic (const char *name,
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int req,
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int opt,
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int rst,
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SCM (*fcn)(),
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SCM *gf)
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{
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switch SCM_GSUBR_MAKTYPE(req, opt, rst) {
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case SCM_GSUBR_MAKTYPE(0, 0, 0):
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return scm_make_subr_with_generic(name, scm_tc7_subr_0, fcn, gf);
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case SCM_GSUBR_MAKTYPE(1, 0, 0):
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return scm_make_subr_with_generic(name, scm_tc7_subr_1, fcn, gf);
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case SCM_GSUBR_MAKTYPE(0, 1, 0):
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return scm_make_subr_with_generic(name, scm_tc7_subr_1o, fcn, gf);
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case SCM_GSUBR_MAKTYPE(1, 1, 0):
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return scm_make_subr_with_generic(name, scm_tc7_subr_2o, fcn, gf);
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case SCM_GSUBR_MAKTYPE(2, 0, 0):
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return scm_make_subr_with_generic(name, scm_tc7_subr_2, fcn, gf);
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case SCM_GSUBR_MAKTYPE(3, 0, 0):
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return scm_make_subr_with_generic(name, scm_tc7_subr_3, fcn, gf);
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case SCM_GSUBR_MAKTYPE(0, 0, 1):
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return scm_make_subr_with_generic(name, scm_tc7_lsubr, fcn, gf);
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case SCM_GSUBR_MAKTYPE(2, 0, 1):
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return scm_make_subr_with_generic(name, scm_tc7_lsubr_2, fcn, gf);
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default:
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;
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}
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scm_misc_error ("scm_make_gsubr_with_generic",
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"can't make primitive-generic with this arity",
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SCM_EOL);
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return SCM_BOOL_F; /* never reached */
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}
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SCM
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scm_gsubr_apply (SCM args)
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{
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SCM self = SCM_CAR(args);
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SCM (*fcn)() = SCM_SUBRF(SCM_GSUBR_PROC(self));
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SCM v[10]; /* must agree with greatest supported arity */
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int typ = SCM_INUM(SCM_GSUBR_TYPE(self));
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int i, n = SCM_GSUBR_REQ(typ) + SCM_GSUBR_OPT(typ) + SCM_GSUBR_REST(typ);
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#if 0
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SCM_ASSERT(n <= sizeof(v)/sizeof(SCM),
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self, "internal programming error", FUNC_NAME);
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#endif
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args = SCM_CDR(args);
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for (i = 0; i < SCM_GSUBR_REQ(typ); i++) {
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#ifndef SCM_RECKLESS
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if (SCM_IMP(args))
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wnargs: scm_wrong_num_args (SCM_SNAME(SCM_GSUBR_PROC(self)));
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#endif
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v[i] = SCM_CAR(args);
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args = SCM_CDR(args);
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}
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for (; i < SCM_GSUBR_REQ(typ) + SCM_GSUBR_OPT(typ); i++) {
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if (SCM_NIMP(args)) {
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v[i] = SCM_CAR(args);
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args = SCM_CDR(args);
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}
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else
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v[i] = SCM_UNDEFINED;
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}
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if (SCM_GSUBR_REST(typ))
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v[i] = args;
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else
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SCM_ASRTGO(SCM_NULLP(args), wnargs);
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switch (n) {
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case 2: return (*fcn)(v[0], v[1]);
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case 3: return (*fcn)(v[0], v[1], v[2]);
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case 4: return (*fcn)(v[0], v[1], v[2], v[3]);
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case 5: return (*fcn)(v[0], v[1], v[2], v[3], v[4]);
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case 6: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5]);
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case 7: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6]);
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case 8: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7]);
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case 9: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8]);
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case 10: return (*fcn)(v[0], v[1], v[2], v[3], v[4], v[5], v[6], v[7], v[8], v[9]);
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}
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return SCM_BOOL_F; /* Never reached. */
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}
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#ifdef GSUBR_TEST
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/* A silly example, taking 2 required args, 1 optional, and
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a scm_list of rest args
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*/
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SCM
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gsubr_21l(SCM req1, SCM req2, SCM opt, SCM rst)
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{
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scm_puts ("gsubr-2-1-l:\n req1: ", scm_cur_outp);
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scm_display(req1, scm_cur_outp);
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scm_puts ("\n req2: ", scm_cur_outp);
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scm_display(req2, scm_cur_outp);
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scm_puts ("\n opt: ", scm_cur_outp);
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scm_display(opt, scm_cur_outp);
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scm_puts ("\n rest: ", scm_cur_outp);
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scm_display(rst, scm_cur_outp);
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scm_newline(scm_cur_outp);
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return SCM_UNSPECIFIED;
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}
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#endif
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void
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scm_init_gsubr()
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{
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/* GJB:FIXME:MD: Use scm_make_subr_opt instead -- gsubr-apply should not be a
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published primitive available at the Scheme level */
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scm_f_gsubr_apply = scm_make_subr_opt("gsubr-apply", scm_tc7_lsubr, scm_gsubr_apply, 0);
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scm_sym_name = SCM_CAR (scm_sysintern ("name", SCM_UNDEFINED));
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scm_permanent_object (scm_sym_name);
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#ifdef GSUBR_TEST
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scm_make_gsubr("gsubr-2-1-l", 2, 1, 1, gsubr_21l); /* example */
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#endif
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}
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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