1 /* Copyright (C) 1995,1996,1997,2000,2001, 2006, 2008 Free Software Foundation, Inc.
2 *
3 * This library is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU Lesser General Public
5 * License as published by the Free Software Foundation; either
6 * version 2.1 of the License, or (at your option) any later version.
7 *
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * Lesser General Public License for more details.
12 *
13 * You should have received a copy of the GNU Lesser General Public
14 * License along with this library; if not, write to the Free Software
15 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
16 */
17
18 #ifdef HAVE_CONFIG_H
19 # include <config.h>
20 #endif
21
22 /* Guile high level (gh_) interface, initialization-related stuff */
23
24 #include <stdio.h>
25
26 #include "libguile/gh.h"
27
28 #if SCM_ENABLE_DEPRECATED
29
30 typedef void (*main_prog_t) (int argc, char **argv);
31 typedef void (*repl_prog_t) (int argc, char **argv);
32
33 /* This function takes care of all real GH initialization. Since it's
34 called by scm_boot_guile, it can safely work with heap objects, or
35 call functions that do so. */
36 static void
gh_launch_pad(void * closure,int argc,char ** argv)37 gh_launch_pad (void *closure, int argc, char **argv)
38 {
39 main_prog_t c_main_prog = (main_prog_t) closure;
40
41 c_main_prog (argc, argv);
42 exit (0);
43 }
44
45 /* starts up the Scheme interpreter, and stays in it. c_main_prog()
46 is the address of the user's main program, since gh_enter() never
47 returns. */
48 void
gh_enter(int argc,char * argv[],main_prog_t c_main_prog)49 gh_enter (int argc, char *argv[], main_prog_t c_main_prog)
50 {
51 scm_boot_guile (argc, argv, gh_launch_pad, (void *) c_main_prog);
52 /* never returns */
53 }
54
55 /* offer a REPL to the C programmer; for now I just invoke the ice-9
56 REPL that is written in Scheme */
57 void
gh_repl(int argc,char * argv[])58 gh_repl (int argc, char *argv[])
59 {
60 /* gh_eval_str ("(top-repl)"); */
61 scm_shell (argc, argv);
62 }
63
64 /* libguile programmers need exception handling mechanisms; here is
65 the recommended way of doing it with the gh_ interface */
66
67 /* gh_catch() -- set up an exception handler for a particular type of
68 error (or any thrown error if tag is SCM_BOOL_T); see
69 ../libguile/throw.c for the comments explaining scm_internal_catch */
70 SCM
gh_catch(SCM tag,scm_t_catch_body body,void * body_data,scm_t_catch_handler handler,void * handler_data)71 gh_catch (SCM tag, scm_t_catch_body body, void *body_data,
72 scm_t_catch_handler handler, void *handler_data)
73 {
74 return scm_internal_catch (tag, body, body_data, handler, handler_data);
75 }
76
77 SCM
gh_standard_handler(void * data SCM_UNUSED,SCM tag,SCM throw_args SCM_UNUSED)78 gh_standard_handler (void *data SCM_UNUSED, SCM tag, SCM throw_args SCM_UNUSED)
79 {
80 fprintf (stderr, "\nJust got an error; tag is\n ");
81 scm_display (tag, scm_current_output_port ());
82 scm_newline (scm_current_output_port ());
83 scm_newline (scm_current_output_port ());
84
85 return SCM_BOOL_F;
86 }
87
88 #endif /* SCM_ENABLE_DEPRECATED */
89
90 /*
91 Local Variables:
92 c-file-style: "gnu"
93 End:
94 */
95