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87 lines
2.7 KiB
C
87 lines
2.7 KiB
C
/* Copyright (C) 1995,1996,1997,2000,2001 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
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* License as published by the Free Software Foundation; either
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* version 2.1 of 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,
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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 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* Guile high level (gh_) interface, initialization-related stuff */
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#include <stdio.h>
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#include "libguile/gh.h"
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typedef void (*main_prog_t) (int argc, char **argv);
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typedef void (*repl_prog_t) (int argc, char **argv);
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/* This function takes care of all real GH initialization. Since it's
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called by scm_boot_guile, it can safely work with heap objects, or
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call functions that do so. */
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static void
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gh_launch_pad (void *closure, int argc, char **argv)
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{
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main_prog_t c_main_prog = (main_prog_t) closure;
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c_main_prog (argc, argv);
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exit (0);
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}
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/* starts up the Scheme interpreter, and stays in it. c_main_prog()
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is the address of the user's main program, since gh_enter() never
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returns. */
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void
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gh_enter (int argc, char *argv[], main_prog_t c_main_prog)
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{
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scm_boot_guile (argc, argv, gh_launch_pad, (void *) c_main_prog);
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/* never returns */
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}
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/* offer a REPL to the C programmer; for now I just invoke the ice-9
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REPL that is written in Scheme */
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void
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gh_repl (int argc, char *argv[])
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{
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/* gh_eval_str ("(top-repl)"); */
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scm_shell (argc, argv);
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}
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/* libguile programmers need exception handling mechanisms; here is
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the recommended way of doing it with the gh_ interface */
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/* gh_catch() -- set up an exception handler for a particular type of
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error (or any thrown error if tag is SCM_BOOL_T); see
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../libguile/throw.c for the comments explaining scm_internal_catch */
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SCM
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gh_catch (SCM tag, scm_t_catch_body body, void *body_data,
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scm_t_catch_handler handler, void *handler_data)
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{
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return scm_internal_catch (tag, body, body_data, handler, handler_data);
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}
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SCM
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gh_standard_handler (void *data SCM_UNUSED, SCM tag, SCM throw_args SCM_UNUSED)
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{
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fprintf (stderr, "\nJust got an error; tag is\n ");
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scm_display (tag, scm_current_output_port ());
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scm_newline (scm_current_output_port ());
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scm_newline (scm_current_output_port ());
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return SCM_BOOL_F;
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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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