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-rw-r--r--libguile/gsubr.c193
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diff --git a/libguile/gsubr.c b/libguile/gsubr.c
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--- a/libguile/gsubr.c
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-/* Copyright (C) 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.
- */
-
-
-#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.
- */
-
-#include "gsubr.h"
-
-#define GSUBR_TEST 1
-
-#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) (SCM_VELTS(cclo)[1])
-#define GSUBR_PROC(cclo) (SCM_VELTS(cclo)[2])
-
-SCM scm_i_name;
-static SCM f_gsubr_apply;
-
-SCM
-scm_make_gsubr(name, req, opt, rst, fcn)
- char *name;
- int req;
- int opt;
- int rst;
- SCM (*fcn)();
-{
- switch GSUBR_MAKTYPE(req, opt, rst) {
- case GSUBR_MAKTYPE(0, 0, 0): return scm_make_subr(name, scm_tc7_subr_0, fcn);
- case GSUBR_MAKTYPE(1, 0, 0): return scm_make_subr(name, scm_tc7_subr_1, fcn);
- case GSUBR_MAKTYPE(0, 1, 0): return scm_make_subr(name, scm_tc7_subr_1o, fcn);
- case GSUBR_MAKTYPE(1, 1, 0): return scm_make_subr(name, scm_tc7_subr_2o, fcn);
- case GSUBR_MAKTYPE(2, 0, 0): return scm_make_subr(name, scm_tc7_subr_2, fcn);
- case GSUBR_MAKTYPE(3, 0, 0): return scm_make_subr(name, scm_tc7_subr_3, fcn);
- case GSUBR_MAKTYPE(0, 0, 1): return scm_make_subr(name, scm_tc7_lsubr, fcn);
- case 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(f_gsubr_apply, 3L);
- long tmp = ((((SCM_CELLPTR)(SCM_CAR(symcell)))-scm_heap_org)<<8);
- if (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);
- GSUBR_PROC(cclo) = z;
- GSUBR_TYPE(cclo) = SCM_MAKINUM(GSUBR_MAKTYPE(req, opt, rst));
- SCM_SETCDR (symcell, cclo);
-#ifdef DEBUG_EXTENSIONS
- if (SCM_REC_PROCNAMES_P)
- scm_set_procedure_property_x (cclo, scm_i_name, SCM_CAR (symcell));
-#endif
- return cclo;
- }
- }
-}
-
-
-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(GSUBR_PROC(self));
- SCM v[10]; /* must agree with greatest supported arity */
- int typ = SCM_INUM(GSUBR_TYPE(self));
- int i, n = GSUBR_REQ(typ) + GSUBR_OPT(typ) + GSUBR_REST(typ);
- args = SCM_CDR(args);
- for (i = 0; i < GSUBR_REQ(typ); i++) {
-#ifndef RECKLESS
- if (SCM_IMP(args))
- scm_wrong_num_args (SCM_SNAME(GSUBR_PROC(self)));
-#endif
- v[i] = SCM_CAR(args);
- args = SCM_CDR(args);
- }
- for (; i < GSUBR_REQ(typ) + GSUBR_OPT(typ); i++) {
- if (SCM_NIMP(args)) {
- v[i] = SCM_CAR(args);
- args = SCM_CDR(args);
- }
- else
- v[i] = SCM_UNDEFINED;
- }
- if (GSUBR_REST(typ))
- v[i] = args;
- switch (n) {
- default: scm_wta(self, "internal programming error", s_gsubr_apply);
- 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]);
- }
-}
-
-
-#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_gen_puts (scm_regular_string, "gsubr-2-1-l:\n req1: ", scm_cur_outp);
- scm_display(req1, scm_cur_outp);
- scm_gen_puts (scm_regular_string, "\n req2: ", scm_cur_outp);
- scm_display(req2, scm_cur_outp);
- scm_gen_puts (scm_regular_string, "\n opt: ", scm_cur_outp);
- scm_display(opt, scm_cur_outp);
- scm_gen_puts (scm_regular_string, "\n rest: ", scm_cur_outp);
- scm_display(rst, scm_cur_outp);
- scm_newline(scm_cur_outp);
- return SCM_UNSPECIFIED;
-}
-#endif
-
-
-
-void
-scm_init_gsubr()
-{
- f_gsubr_apply = scm_make_subr(s_gsubr_apply, scm_tc7_lsubr, scm_gsubr_apply);
- scm_i_name = SCM_CAR (scm_sysintern ("name", SCM_UNDEFINED));
- scm_permanent_object (scm_i_name);
-#ifdef GSUBR_TEST
- scm_make_gsubr("gsubr-2-1-l", 2, 1, 1, gsubr_21l); /* example */
-#endif
-}