mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 11:50:28 +02:00
23f276dea7
* libguile/eval.h: * libguile/eval.c (scm_closure_apply): New function, applies a closure. Won't be necessary in the future, but for now here it is, with internal linkage. * libguile/gsubr.h: * libguile/gsubr.c (scm_i_gsubr_apply_array): New function, applies a gsubr to an array of values, potentially extending that array for optional arguments and rest arguments and such. * libguile/vm.c (apply_foreign): New function, applies a foreign function to arguments on the stack, in place. * libguile/vm-i-system.c (call): Add a case for procedures-with-setters (will go away when they are applicable structs). Instead of calling the evaluator for foreign functions, call apply_foreign.
395 lines
11 KiB
C
395 lines
11 KiB
C
/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001, 2006, 2008, 2009 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <alloca.h>
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#include <stdio.h>
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#include <stdarg.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/gsubr.h"
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#include "libguile/deprecation.h"
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#include "libguile/private-options.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_GLOBAL_SYMBOL (scm_sym_name, "name");
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static SCM
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create_gsubr (int define, const char *name,
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unsigned int req, unsigned int opt, unsigned int rst,
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SCM (*fcn) ())
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{
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SCM subr;
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switch (SCM_GSUBR_MAKTYPE (req, opt, rst))
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{
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case SCM_GSUBR_MAKTYPE(0, 0, 0):
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subr = scm_c_make_subr (name, scm_tc7_subr_0, fcn);
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break;
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case SCM_GSUBR_MAKTYPE(1, 0, 0):
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subr = scm_c_make_subr (name, scm_tc7_subr_1, fcn);
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break;
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case SCM_GSUBR_MAKTYPE(0, 1, 0):
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subr = scm_c_make_subr (name, scm_tc7_subr_1o, fcn);
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break;
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case SCM_GSUBR_MAKTYPE(1, 1, 0):
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subr = scm_c_make_subr (name, scm_tc7_subr_2o, fcn);
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break;
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case SCM_GSUBR_MAKTYPE(2, 0, 0):
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subr = scm_c_make_subr (name, scm_tc7_subr_2, fcn);
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break;
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case SCM_GSUBR_MAKTYPE(3, 0, 0):
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subr = scm_c_make_subr (name, scm_tc7_subr_3, fcn);
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break;
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case SCM_GSUBR_MAKTYPE(0, 0, 1):
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subr = scm_c_make_subr (name, scm_tc7_lsubr, fcn);
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break;
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case SCM_GSUBR_MAKTYPE(2, 0, 1):
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subr = scm_c_make_subr (name, scm_tc7_lsubr_2, fcn);
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break;
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default:
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{
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unsigned type;
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type = SCM_GSUBR_MAKTYPE (req, opt, rst);
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if (SCM_GSUBR_REQ (type) != req
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|| SCM_GSUBR_OPT (type) != opt
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|| SCM_GSUBR_REST (type) != rst)
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scm_out_of_range ("create_gsubr", scm_from_uint (req + opt + rst));
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subr = scm_c_make_subr (name, scm_tc7_gsubr | (type << 8U),
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fcn);
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}
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}
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if (define)
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scm_define (SCM_SUBR_NAME (subr), subr);
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return subr;
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}
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SCM
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scm_c_make_gsubr (const char *name, int req, int opt, int rst, SCM (*fcn)())
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{
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return create_gsubr (0, name, req, opt, rst, fcn);
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}
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SCM
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scm_c_define_gsubr (const char *name, int req, int opt, int rst, SCM (*fcn)())
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{
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return create_gsubr (1, name, req, opt, rst, fcn);
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}
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static SCM
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create_gsubr_with_generic (int define,
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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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SCM subr;
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switch (SCM_GSUBR_MAKTYPE(req, opt, rst))
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{
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case SCM_GSUBR_MAKTYPE(0, 0, 0):
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subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_0, fcn, gf);
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goto create_subr;
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case SCM_GSUBR_MAKTYPE(1, 0, 0):
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subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_1, fcn, gf);
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goto create_subr;
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case SCM_GSUBR_MAKTYPE(0, 1, 0):
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subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_1o, fcn, gf);
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goto create_subr;
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case SCM_GSUBR_MAKTYPE(1, 1, 0):
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subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_2o, fcn, gf);
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goto create_subr;
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case SCM_GSUBR_MAKTYPE(2, 0, 0):
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subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_2, fcn, gf);
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goto create_subr;
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case SCM_GSUBR_MAKTYPE(3, 0, 0):
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subr = scm_c_make_subr_with_generic (name, scm_tc7_subr_3, fcn, gf);
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goto create_subr;
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case SCM_GSUBR_MAKTYPE(0, 0, 1):
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subr = scm_c_make_subr_with_generic (name, scm_tc7_lsubr, fcn, gf);
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goto create_subr;
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case SCM_GSUBR_MAKTYPE(2, 0, 1):
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subr = scm_c_make_subr_with_generic (name, scm_tc7_lsubr_2, fcn, gf);
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create_subr:
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if (define)
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scm_define (SCM_SUBR_NAME (subr), subr);
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return subr;
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default:
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;
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}
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scm_misc_error ("scm_c_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_c_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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return create_gsubr_with_generic (0, name, req, opt, rst, fcn, gf);
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}
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SCM
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scm_c_define_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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return create_gsubr_with_generic (1, name, req, opt, rst, fcn, gf);
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}
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/* Apply PROC, a gsubr, to the ARGC arguments in ARGV. ARGC is expected to
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match the number of arguments of the underlying C function. */
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static SCM
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gsubr_apply_raw (SCM proc, unsigned int argc, const SCM *argv)
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{
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SCM (*fcn) ();
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unsigned int type, argc_max;
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type = SCM_GSUBR_TYPE (proc);
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argc_max = SCM_GSUBR_REQ (type) + SCM_GSUBR_OPT (type)
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+ SCM_GSUBR_REST (type);
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if (SCM_UNLIKELY (argc != argc_max))
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/* We expect the exact argument count. */
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scm_wrong_num_args (SCM_SUBR_NAME (proc));
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fcn = SCM_SUBRF (proc);
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switch (argc)
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{
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case 0:
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return (*fcn) ();
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case 1:
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return (*fcn) (argv[0]);
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case 2:
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return (*fcn) (argv[0], argv[1]);
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case 3:
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return (*fcn) (argv[0], argv[1], argv[2]);
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case 4:
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return (*fcn) (argv[0], argv[1], argv[2], argv[3]);
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case 5:
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return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4]);
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case 6:
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return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5]);
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case 7:
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return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5],
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argv[6]);
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case 8:
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return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5],
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argv[6], argv[7]);
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case 9:
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return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5],
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argv[6], argv[7], argv[8]);
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case 10:
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return (*fcn) (argv[0], argv[1], argv[2], argv[3], argv[4], argv[5],
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argv[6], argv[7], argv[8], argv[9]);
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default:
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scm_misc_error ((char *) SCM_SUBR_NAME (proc),
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"gsubr invocation with more than 10 arguments not implemented",
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SCM_EOL);
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}
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return SCM_BOOL_F; /* Never reached. */
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}
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/* Apply PROC, a gsubr, to the given arguments. Missing optional arguments
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are added, and rest arguments are turned into a list. */
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SCM
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scm_i_gsubr_apply (SCM proc, SCM arg, ...)
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{
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unsigned int type, argc, argc_max;
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SCM *argv;
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va_list arg_list;
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type = SCM_GSUBR_TYPE (proc);
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argc_max = SCM_GSUBR_REQ (type) + SCM_GSUBR_OPT (type);
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argv = alloca ((argc_max + SCM_GSUBR_REST (type)) * sizeof (*argv));
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va_start (arg_list, arg);
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for (argc = 0;
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!SCM_UNBNDP (arg) && argc < argc_max;
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argc++, arg = va_arg (arg_list, SCM))
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argv[argc] = arg;
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if (SCM_UNLIKELY (argc < SCM_GSUBR_REQ (type)))
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scm_wrong_num_args (SCM_SUBR_NAME (proc));
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/* Fill in optional arguments that were not passed. */
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while (argc < argc_max)
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argv[argc++] = SCM_UNDEFINED;
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if (SCM_GSUBR_REST (type))
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{
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/* Accumulate rest arguments in a list. */
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SCM *rest_loc;
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argv[argc_max] = SCM_EOL;
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for (rest_loc = &argv[argc_max];
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!SCM_UNBNDP (arg);
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rest_loc = SCM_CDRLOC (*rest_loc), arg = va_arg (arg_list, SCM))
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*rest_loc = scm_cons (arg, SCM_EOL);
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argc = argc_max + 1;
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}
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va_end (arg_list);
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return gsubr_apply_raw (proc, argc, argv);
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}
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/* Apply SELF, a gsubr, to the arguments listed in ARGS. Missing optional
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arguments are added, and rest arguments are kept into a list. */
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SCM
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scm_i_gsubr_apply_list (SCM self, SCM args)
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#define FUNC_NAME "scm_i_gsubr_apply"
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{
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SCM v[SCM_GSUBR_MAX];
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unsigned int typ = SCM_GSUBR_TYPE (self);
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long i, n = SCM_GSUBR_REQ (typ) + SCM_GSUBR_OPT (typ) + SCM_GSUBR_REST (typ);
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for (i = 0; i < SCM_GSUBR_REQ (typ); i++) {
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if (scm_is_null (args))
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scm_wrong_num_args (SCM_SUBR_NAME (self));
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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 if (!scm_is_null (args))
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scm_wrong_num_args (SCM_SUBR_NAME (self));
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return gsubr_apply_raw (self, n, v);
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}
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#undef FUNC_NAME
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/* Apply SELF, a gsubr, to the arguments in ARGS. Missing optional
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arguments are added, and rest arguments are consed into a list. */
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SCM
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scm_i_gsubr_apply_array (SCM self, SCM *args, int nargs, int headroom)
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#define FUNC_NAME "scm_i_gsubr_apply"
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{
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unsigned int typ = SCM_GSUBR_TYPE (self);
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long i, n = SCM_GSUBR_REQ (typ) + SCM_GSUBR_OPT (typ) + SCM_GSUBR_REST (typ);
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if (SCM_UNLIKELY (nargs < SCM_GSUBR_REQ (typ)))
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scm_wrong_num_args (SCM_SUBR_NAME (self));
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if (SCM_UNLIKELY (headroom < n - nargs))
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{
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/* fallback on apply-list */
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SCM arglist = SCM_EOL;
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while (nargs--)
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arglist = scm_cons (args[nargs], arglist);
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return scm_i_gsubr_apply_list (self, arglist);
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}
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for (i = nargs; i < SCM_GSUBR_REQ (typ) + SCM_GSUBR_OPT (typ); i++)
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args[i] = SCM_UNDEFINED;
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if (SCM_GSUBR_REST(typ))
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{
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SCM rest = SCM_EOL;
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/* fallback on apply-list */
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while (nargs-- >= n)
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rest = scm_cons (args[nargs], rest);
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args[n - 1] = rest;
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}
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else if (nargs > n)
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scm_wrong_num_args (SCM_SUBR_NAME (self));
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return gsubr_apply_raw (self, n, args);
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}
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#undef FUNC_NAME
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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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#ifdef GSUBR_TEST
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scm_c_define_gsubr ("gsubr-2-1-l", 2, 1, 1, gsubr_21l); /* example */
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#endif
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#include "libguile/gsubr.x"
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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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