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