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ee2a8b9b JB |
1 | /* Copyright (C) 1995,1996 Free Software Foundation, Inc. |
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 | |
15 | * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. | |
16 | * | |
17 | * As a special exception, the Free Software Foundation gives permission | |
18 | * for additional uses of the text contained in its release of GUILE. | |
19 | * | |
20 | * The exception is that, if you link the GUILE library with other files | |
21 | * to produce an executable, this does not by itself cause the | |
22 | * resulting executable to be covered by the GNU General Public License. | |
23 | * Your use of that executable is in no way restricted on account of | |
24 | * linking the GUILE library code into it. | |
25 | * | |
26 | * This exception does not however invalidate any other reasons why | |
27 | * the executable file might be covered by the GNU General Public License. | |
28 | * | |
29 | * This exception applies only to the code released by the | |
30 | * Free Software Foundation under the name GUILE. If you copy | |
31 | * code from other Free Software Foundation releases into a copy of | |
32 | * GUILE, as the General Public License permits, the exception does | |
33 | * not apply to the code that you add in this way. To avoid misleading | |
34 | * anyone as to the status of such modified files, you must delete | |
35 | * this exception notice from them. | |
36 | * | |
37 | * If you write modifications of your own for GUILE, it is your choice | |
38 | * whether to permit this exception to apply to your modifications. | |
39 | * If you do not wish that, delete this exception notice. | |
40 | */ | |
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 | ||
60 | gh_eval_str ("(primitive-load-path \"ice-9/boot-9.scm\")"); | |
61 | c_main_prog (argc, argv); | |
62 | exit (0); | |
63 | } | |
64 | ||
65 | ||
66 | /* starts up the Scheme interpreter, and stays in it. c_main_prog() | |
67 | is the address of the user's main program, since gh_enter() never | |
68 | returns. */ | |
69 | void | |
70 | gh_enter (int argc, char *argv[], main_prog_t c_main_prog) | |
71 | { | |
72 | scm_boot_guile (argc, argv, gh_launch_pad, c_main_prog); | |
73 | /* never returns */ | |
74 | } | |
75 | ||
76 | /* offer a REPL to the C programmer; for now I just invoke the ice-9 | |
77 | REPL that is written in Scheme */ | |
78 | void | |
79 | gh_repl () | |
80 | { | |
81 | /* gh_eval_str("(primitive-load-path \"ice-9/boot-9.scm\")"); */ | |
82 | gh_eval_str ("(top-repl)"); | |
83 | } | |
84 | ||
85 | /* libguile programmers need exception handling mechanisms; here is | |
86 | the recommended way of doing it with the gh_ interface */ | |
87 | ||
88 | /* gh_catch() -- set up an exception handler for a particular type of | |
89 | error (or any thrown error if tag is SCM_BOOL_T); see | |
90 | ../libguile/throw.c for the comments explaining scm_internal_catch */ | |
91 | SCM | |
92 | gh_catch (SCM tag, scm_catch_body_t body, void *body_data, | |
93 | scm_catch_handler_t handler, void *handler_data) | |
94 | { | |
95 | return scm_internal_catch (tag, body, body_data, handler, handler_data); | |
96 | } | |
97 | ||
98 | SCM | |
99 | gh_standard_handler (void *data, SCM tag, SCM throw_args) | |
100 | { | |
101 | fprintf (stderr, "\nJust got an error; tag is\n "); | |
102 | scm_display (tag, scm_current_output_port ()); | |
103 | scm_newline (scm_current_output_port ()); | |
104 | scm_newline (scm_current_output_port ()); | |
105 | ||
106 | return SCM_BOOL_F; | |
107 | } |