diff options
Diffstat (limited to 'gsubr.c')
| -rw-r--r-- | gsubr.c | 138 |
1 files changed, 138 insertions, 0 deletions
@@ -0,0 +1,138 @@ +/* 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, 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. + */ + +/* "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) + 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, cclo = makcclo(f_gsubr_apply, 3L); + long tmp = ((((CELLPTR)(CAR(symcell)))-heap_org)<<8); + ASSERT(GSUBR_MAX >= req + opt + rst, MAKINUM(req + opt + rst), + OUTOFRANGE, "make_gsubr"); + if ((tmp>>8) != ((CELLPTR)(CAR(symcell))-heap_org)) + tmp = 0; + NEWCELL(z); + SUBRF(z) = fcn; + CAR(z) = tmp + tc7_subr_0; + 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, CHARS(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); +} |