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0f2d19dd 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 | #include <stdio.h> | |
44 | #include "_scm.h" | |
20e6290e JB |
45 | #include "pairs.h" |
46 | #include "genio.h" | |
47 | #include "throw.h" | |
48 | ||
49 | #include "error.h" | |
0f2d19dd | 50 | |
95b88819 GH |
51 | #ifdef HAVE_UNISTD_H |
52 | #include <unistd.h> | |
53 | #endif | |
0f2d19dd JB |
54 | \f |
55 | ||
56 | \f | |
57 | /* {Errors and Exceptional Conditions} | |
58 | */ | |
59 | ||
60 | SCM system_error_sym; | |
61 | ||
62 | /* True between SCM_DEFER_INTS and SCM_ALLOW_INTS, and | |
63 | * when the interpreter is not running at all. | |
64 | */ | |
65 | int scm_ints_disabled = 1; | |
66 | ||
67 | ||
68 | extern int errno; | |
69 | #ifdef __STDC__ | |
70 | static void | |
71 | err_head (char *str) | |
72 | #else | |
73 | static void | |
74 | err_head (str) | |
75 | char *str; | |
76 | #endif | |
77 | { | |
78 | int oerrno = errno; | |
79 | if (SCM_NIMP (scm_cur_outp)) | |
80 | scm_fflush (scm_cur_outp); | |
81 | scm_gen_putc ('\n', scm_cur_errp); | |
82 | #if 0 | |
83 | if (SCM_BOOL_F != *scm_loc_loadpath) | |
84 | { | |
85 | scm_iprin1 (*scm_loc_loadpath, scm_cur_errp, 1); | |
86 | scm_gen_puts (scm_regular_string, ", line ", scm_cur_errp); | |
87 | scm_intprint ((long) scm_linum, 10, scm_cur_errp); | |
88 | scm_gen_puts (scm_regular_string, ": ", scm_cur_errp); | |
89 | } | |
90 | #endif | |
91 | scm_fflush (scm_cur_errp); | |
92 | errno = oerrno; | |
93 | if (scm_cur_errp == scm_def_errp) | |
94 | { | |
95 | if (errno > 0) | |
96 | perror (str); | |
97 | fflush (stderr); | |
98 | return; | |
99 | } | |
100 | } | |
101 | ||
102 | ||
103 | SCM_PROC(s_errno, "errno", 0, 1, 0, scm_errno); | |
104 | #ifdef __STDC__ | |
105 | SCM | |
106 | scm_errno (SCM arg) | |
107 | #else | |
108 | SCM | |
109 | scm_errno (arg) | |
110 | SCM arg; | |
111 | #endif | |
112 | { | |
113 | int old = errno; | |
114 | if (!SCM_UNBNDP (arg)) | |
115 | { | |
116 | if (SCM_FALSEP (arg)) | |
117 | errno = 0; | |
118 | else | |
119 | errno = SCM_INUM (arg); | |
120 | } | |
121 | return SCM_MAKINUM (old); | |
122 | } | |
123 | ||
124 | SCM_PROC(s_perror, "perror", 1, 0, 0, scm_perror); | |
125 | #ifdef __STDC__ | |
126 | SCM | |
127 | scm_perror (SCM arg) | |
128 | #else | |
129 | SCM | |
130 | scm_perror (arg) | |
131 | SCM arg; | |
132 | #endif | |
133 | { | |
134 | SCM_ASSERT (SCM_NIMP (arg) && SCM_STRINGP (arg), arg, SCM_ARG1, s_perror); | |
135 | err_head (SCM_CHARS (arg)); | |
136 | return SCM_UNSPECIFIED; | |
137 | } | |
138 | ||
139 | ||
140 | #ifdef __STDC__ | |
141 | void | |
142 | scm_everr (SCM exp, SCM env, SCM arg, char *pos, char *s_subr) | |
143 | #else | |
144 | void | |
145 | scm_everr (exp, env, arg, pos, s_subr) | |
146 | SCM exp; | |
147 | SCM env; | |
148 | SCM arg; | |
149 | char *pos; | |
150 | char *s_subr; | |
151 | #endif | |
152 | { | |
153 | SCM desc; | |
154 | SCM args; | |
155 | ||
156 | if ((~0x1fL) & (long) pos) | |
157 | desc = scm_makfrom0str (pos); | |
158 | else | |
159 | desc = SCM_MAKINUM ((long)pos); | |
160 | ||
161 | { | |
162 | SCM sym; | |
163 | if (!s_subr || !*s_subr) | |
164 | sym = SCM_BOOL_F; | |
165 | else | |
166 | sym = SCM_CAR (scm_intern0 (s_subr)); | |
167 | args = scm_listify (desc, sym, arg, SCM_UNDEFINED); | |
168 | } | |
169 | ||
170 | /* (throw (quote %%system-error) <desc> <proc-name> arg) | |
171 | * | |
172 | * <desc> is a string or an integer (see %%system-errors). | |
173 | * <proc-name> is a symbol or #f in some annoying cases (e.g. cddr). | |
174 | */ | |
175 | ||
176 | scm_ithrow (system_error_sym, args, 1); | |
177 | ||
178 | /* No return, but just in case: */ | |
179 | ||
043045f8 | 180 | write (2, "unhandled system error", sizeof ("unhandled system error") - 1); |
0f2d19dd JB |
181 | exit (1); |
182 | } | |
183 | ||
184 | #ifdef __STDC__ | |
185 | SCM | |
186 | scm_wta (SCM arg, char *pos, char *s_subr) | |
187 | #else | |
188 | SCM | |
189 | scm_wta (arg, pos, s_subr) | |
190 | SCM arg; | |
191 | char *pos; | |
192 | char *s_subr; | |
193 | #endif | |
194 | { | |
195 | scm_everr (SCM_UNDEFINED, SCM_EOL, arg, pos, s_subr); | |
196 | return SCM_UNSPECIFIED; | |
197 | } | |
198 | ||
7cb1d4d3 | 199 | void (*scm_error_callback) () = 0; |
0f2d19dd | 200 | |
7cb1d4d3 GH |
201 | void |
202 | scm_error (key, subr, message, args, rest) | |
203 | SCM key; | |
204 | char *subr; | |
205 | char *message; | |
206 | SCM args; | |
207 | SCM rest; | |
208 | { | |
209 | SCM arg_list; | |
210 | if (scm_error_callback) | |
211 | (*scm_error_callback) (key, subr, message, args, rest); | |
212 | ||
213 | arg_list = scm_listify (scm_makfrom0str (subr), | |
214 | scm_makfrom0str (message), | |
215 | args, | |
216 | rest, | |
217 | SCM_UNDEFINED); | |
218 | scm_ithrow (key, arg_list, 1); | |
219 | ||
220 | /* No return, but just in case: */ | |
221 | ||
222 | write (2, "unhandled system error", sizeof ("unhandled system error") - 1); | |
223 | exit (1); | |
224 | } | |
0f2d19dd JB |
225 | |
226 | #ifdef __STDC__ | |
227 | void | |
228 | scm_init_error (void) | |
229 | #else | |
230 | void | |
231 | scm_init_error () | |
232 | #endif | |
233 | { | |
1efc5155 | 234 | system_error_sym = scm_permanent_object (SCM_CAR (scm_intern0 ("%%system-error"))); |
0f2d19dd JB |
235 | #include "error.x" |
236 | } | |
237 |