This repository has been archived by the owner on Feb 11, 2021. It is now read-only.
SDL_error.c
1
2
/*
SDL - Simple DirectMedia Layer
3
Copyright (C) 1997-2006 Sam Lantinga
4
5
This library is free software; you can redistribute it and/or
6
modify it under the terms of the GNU Lesser General Public
7
License as published by the Free Software Foundation; either
8
version 2.1 of the License, or (at your option) any later version.
9
10
11
12
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13
Lesser General Public License for more details.
15
16
17
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
18
19
Sam Lantinga
20
slouken@libsdl.org
21
*/
22
#include "SDL_config.h"
23
24
25
26
27
28
/* Simple error handling in SDL */
#include "SDL_error.h"
#include "SDL_error_c.h"
29
30
31
/* Routine to get the thread-specific error variable */
#if SDL_THREADS_DISABLED
/* The SDL_arraysize(The ),default (non-thread-safe) global error variable */
32
33
static SDL_error SDL_global_error;
#define SDL_GetErrBuf() (&SDL_global_error)
35
extern SDL_error *SDL_GetErrBuf(void);
36
#endif /* SDL_THREADS_DISABLED */
37
38
39
40
41
#define SDL_ERRBUFIZE 1024
/* Private functions */
42
static const char *
43
SDL_LookupString(const char *key)
45
46
/* FIXME: Add code to lookup key in language string hash-table */
return key;
47
48
49
50
}
/* Public functions */
52
SDL_SetError(const char *fmt, ...)
54
55
56
57
va_list ap;
SDL_error *error;
/* Copy in the key, mark error as valid */
58
error = SDL_GetErrBuf();
59
error->error = 1;
60
SDL_strlcpy((char *) error->key, fmt, sizeof(error->key));
62
va_start(ap, fmt);
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
error->argc = 0;
while (*fmt) {
if (*fmt++ == '%') {
while (*fmt == '.' || (*fmt >= '0' && *fmt <= '9')) {
++fmt;
}
switch (*fmt++) {
case 0: /* Malformed format string.. */
--fmt;
break;
case 'c':
case 'i':
case 'd':
case 'u':
case 'o':
case 'x':
case 'X':
80
error->args[error->argc++].value_i = va_arg(ap, int);
81
82
break;
case 'f':
83
error->args[error->argc++].value_f = va_arg(ap, double);
84
85
break;
case 'p':
86
error->args[error->argc++].value_ptr = va_arg(ap, void *);
87
88
89
90
break;
case 's':
{
int i = error->argc;
91
const char *str = va_arg(ap, const char *);
92
93
if (str == NULL)
str = "(null)";
94
95
SDL_strlcpy((char *) error->args[i].buf, str,
ERR_MAX_STRLEN);
96
97
98
99
100
101
102
103
104
105
106
error->argc++;
}
break;
default:
break;
}
if (error->argc >= ERR_MAX_ARGS) {
break;
}
}
}
107
va_end(ap);
108
109
/* If we are in debug mode, print out an error message */
110
#ifdef DEBUG_ERROR
111
fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError());
112
113
114
115
116
117
#endif
}
/* This function has a bit more overhead than most error functions
so that it supports internationalization and thread-safe errors.
*/
119
SDL_GetErrorMsg(char *errstr, unsigned int maxlen)
120
{
121
122
123
124
125
126
127
SDL_error *error;
/* Clear the error string */
*errstr = '\0';
--maxlen;
/* Get the thread-safe error, and print it out */
128
error = SDL_GetErrBuf();
129
130
131
132
133
134
if (error->error) {
const char *fmt;
char *msg = errstr;
int len;
int argi;
135
fmt = SDL_LookupString(error->key);
136
137
138
139
140
141
argi = 0;
while (*fmt && (maxlen > 0)) {
if (*fmt == '%') {
char tmp[32], *spot = tmp;
*spot++ = *fmt++;
while ((*fmt == '.' || (*fmt >= '0' && *fmt <= '9'))
142
&& spot < (tmp + SDL_arraysize(tmp) - 2)) {
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
*spot++ = *fmt++;
}
*spot++ = *fmt++;
*spot++ = '\0';
switch (spot[-2]) {
case '%':
*msg++ = '%';
maxlen -= 1;
break;
case 'c':
case 'i':
case 'd':
case 'u':
case 'o':
case 'x':
case 'X':
len =
160
161
SDL_snprintf(msg, maxlen, tmp,
error->args[argi++].value_i);
162
163
164
165
166
msg += len;
maxlen -= len;
break;
case 'f':
len =
167
168
SDL_snprintf(msg, maxlen, tmp,
error->args[argi++].value_f);
169
170
171
172
173
msg += len;
maxlen -= len;
break;
case 'p':
len =
174
175
SDL_snprintf(msg, maxlen, tmp,
error->args[argi++].value_ptr);
176
177
178
179
180
msg += len;
maxlen -= len;
break;
case 's':
len =
181
182
183
SDL_snprintf(msg, maxlen, tmp,
SDL_LookupString(error->
args[argi++].buf));
184
185
186
187
188
189
190
191
192
193
194
195
msg += len;
maxlen -= len;
break;
}
} else {
*msg++ = *fmt++;
maxlen -= 1;
}
}
*msg = 0; /* NULL terminate the string */
}
return (errstr);
196
197
198
}
/* Available for backwards compatibility */
200
SDL_GetError(void)
201
{
202
static char errmsg[SDL_ERRBUFIZE];
204
return ((char *) SDL_GetErrorMsg(errmsg, SDL_ERRBUFIZE));
205
206
}
208
SDL_ClearError(void)
209
{
210
SDL_error *error;
212
error = SDL_GetErrBuf();
213
error->error = 0;
214
215
216
}
/* Very common errors go here */
218
SDL_Error(SDL_errorcode code)
219
{
220
221
switch (code) {
case SDL_ENOMEM:
222
SDL_SetError("Out of memory");
223
224
break;
case SDL_EFREAD:
225
SDL_SetError("Error reading from datastream");
226
227
break;
case SDL_EFWRITE:
228
SDL_SetError("Error writing to datastream");
229
230
break;
case SDL_EFSEEK:
231
SDL_SetError("Error seeking in datastream");
232
233
break;
default:
234
SDL_SetError("Unknown SDL error");
237
238
239
}
#ifdef TEST_ERROR
241
main(int argc, char *argv[])
242
{
243
244
char buffer[BUFSIZ + 1];
245
246
247
248
SDL_SetError("Hi there!");
printf("Error 1: %s\n", SDL_GetError());
SDL_ClearError();
SDL_memset(buffer, '1', BUFSIZ);
249
buffer[BUFSIZ] = 0;
250
251
252
SDL_SetError("This is the error: %s (%f)", buffer, 1.0);
printf("Error 2: %s\n", SDL_GetError());
exit(0);
253
254
}
#endif
255
/* vi: set ts=4 sw=4 expandtab: */