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1e598865 | 1 | /* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc. |
ee2a8b9b JB |
2 | |
3 | * This program is free software; you can redistribute it and/or modify | |
4 | * it under the terms of the GNU General Public License as published by | |
5 | * the Free Software Foundation; either version 2, or (at your option) | |
6 | * any later version. | |
7 | * | |
8 | * This program 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 | |
11 | * GNU General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License | |
14 | * along with this software; see the file COPYING. If not, write to | |
82892bed JB |
15 | * the Free Software Foundation, Inc., 59 Temple Place, Suite 330, |
16 | * Boston, MA 02111-1307 USA | |
ee2a8b9b JB |
17 | * |
18 | * As a special exception, the Free Software Foundation gives permission | |
19 | * for additional uses of the text contained in its release of GUILE. | |
20 | * | |
21 | * The exception is that, if you link the GUILE library with other files | |
22 | * to produce an executable, this does not by itself cause the | |
23 | * resulting executable to be covered by the GNU General Public License. | |
24 | * Your use of that executable is in no way restricted on account of | |
25 | * linking the GUILE library code into it. | |
26 | * | |
27 | * This exception does not however invalidate any other reasons why | |
28 | * the executable file might be covered by the GNU General Public License. | |
29 | * | |
30 | * This exception applies only to the code released by the | |
31 | * Free Software Foundation under the name GUILE. If you copy | |
32 | * code from other Free Software Foundation releases into a copy of | |
33 | * GUILE, as the General Public License permits, the exception does | |
34 | * not apply to the code that you add in this way. To avoid misleading | |
35 | * anyone as to the status of such modified files, you must delete | |
36 | * this exception notice from them. | |
37 | * | |
38 | * If you write modifications of your own for GUILE, it is your choice | |
39 | * whether to permit this exception to apply to your modifications. | |
82892bed | 40 | * If you do not wish that, delete this exception notice. */ |
ee2a8b9b JB |
41 | \f |
42 | ||
43 | /* Guile high level (gh_) interface, initialization-related stuff */ | |
44 | ||
45 | #include <stdio.h> | |
46 | ||
47 | #include <gh.h> | |
48 | ||
49 | typedef void (*main_prog_t) (int argc, char **argv); | |
50 | typedef void (*repl_prog_t) (int argc, char **argv); | |
51 | ||
52 | /* This function takes care of all real GH initialization. Since it's | |
53 | called by scm_boot_guile, it can safely work with heap objects, or | |
54 | call functions that do so. */ | |
55 | static void | |
56 | gh_launch_pad (void *closure, int argc, char **argv) | |
57 | { | |
58 | main_prog_t c_main_prog = (main_prog_t) closure; | |
59 | ||
ee2a8b9b JB |
60 | c_main_prog (argc, argv); |
61 | exit (0); | |
62 | } | |
63 | ||
ee2a8b9b JB |
64 | /* starts up the Scheme interpreter, and stays in it. c_main_prog() |
65 | is the address of the user's main program, since gh_enter() never | |
66 | returns. */ | |
67 | void | |
68 | gh_enter (int argc, char *argv[], main_prog_t c_main_prog) | |
69 | { | |
524dfbcc | 70 | scm_boot_guile (argc, argv, gh_launch_pad, (void *) c_main_prog); |
ee2a8b9b JB |
71 | /* never returns */ |
72 | } | |
73 | ||
74 | /* offer a REPL to the C programmer; for now I just invoke the ice-9 | |
75 | REPL that is written in Scheme */ | |
76 | void | |
ef5d3ae1 | 77 | gh_repl (int argc, char *argv[]) |
ee2a8b9b | 78 | { |
ef5d3ae1 MG |
79 | /* gh_eval_str ("(top-repl)"); */ |
80 | scm_shell (argc, argv); | |
ee2a8b9b JB |
81 | } |
82 | ||
83 | /* libguile programmers need exception handling mechanisms; here is | |
84 | the recommended way of doing it with the gh_ interface */ | |
85 | ||
86 | /* gh_catch() -- set up an exception handler for a particular type of | |
87 | error (or any thrown error if tag is SCM_BOOL_T); see | |
88 | ../libguile/throw.c for the comments explaining scm_internal_catch */ | |
89 | SCM | |
90 | gh_catch (SCM tag, scm_catch_body_t body, void *body_data, | |
91 | scm_catch_handler_t handler, void *handler_data) | |
92 | { | |
93 | return scm_internal_catch (tag, body, body_data, handler, handler_data); | |
94 | } | |
95 | ||
96 | SCM | |
97 | gh_standard_handler (void *data, SCM tag, SCM throw_args) | |
98 | { | |
99 | fprintf (stderr, "\nJust got an error; tag is\n "); | |
100 | scm_display (tag, scm_current_output_port ()); | |
101 | scm_newline (scm_current_output_port ()); | |
102 | scm_newline (scm_current_output_port ()); | |
103 | ||
104 | return SCM_BOOL_F; | |
105 | } | |
89e00824 ML |
106 | |
107 | /* | |
108 | Local Variables: | |
109 | c-file-style: "gnu" | |
110 | End: | |
111 | */ |