This repository has been archived by the owner on Feb 11, 2021.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) 1997-2010 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
/* Simple error handling in SDL */
26
#include "SDL_log.h"
27
28
29
#include "SDL_error.h"
#include "SDL_error_c.h"
31
32
/* Routine to get the thread-specific error variable */
#if SDL_THREADS_DISABLED
33
/* The default (non-thread-safe) global error variable */
34
35
static SDL_error SDL_global_error;
#define SDL_GetErrBuf() (&SDL_global_error)
36
37
38
#else
extern SDL_error *SDL_GetErrBuf(void);
#endif /* SDL_THREADS_DISABLED */
39
40
41
42
43
#define SDL_ERRBUFIZE 1024
/* Private functions */
44
45
static const char *
SDL_LookupString(const char *key)
47
48
/* FIXME: Add code to lookup key in language string hash-table */
return key;
49
50
51
52
}
/* Public functions */
53
54
void
SDL_SetError(const char *fmt, ...)
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
va_list ap;
SDL_error *error;
/* Copy in the key, mark error as valid */
error = SDL_GetErrBuf();
error->error = 1;
SDL_strlcpy((char *) error->key, fmt, sizeof(error->key));
va_start(ap, fmt);
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':
error->args[error->argc++].value_i = va_arg(ap, int);
break;
case 'f':
error->args[error->argc++].value_f = va_arg(ap, double);
break;
case 'p':
error->args[error->argc++].value_ptr = va_arg(ap, void *);
break;
case 's':
{
int i = error->argc;
const char *str = va_arg(ap, const char *);
if (str == NULL)
str = "(null)";
SDL_strlcpy((char *) error->args[i].buf, str,
ERR_MAX_STRLEN);
error->argc++;
}
break;
default:
break;
}
if (error->argc >= ERR_MAX_ARGS) {
break;
}
}
}
va_end(ap);
/* If we are in debug mode, print out an error message */
112
SDL_LogError(SDL_LOG_CATEGORY_ERROR, "%s", SDL_GetError());
113
114
115
116
117
}
/* This function has a bit more overhead than most error functions
so that it supports internationalization and thread-safe errors.
*/
118
static char *
119
SDL_GetErrorMsg(char *errstr, unsigned int maxlen)
120
{
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
SDL_error *error;
/* Clear the error string */
*errstr = '\0';
--maxlen;
/* Get the thread-safe error, and print it out */
error = SDL_GetErrBuf();
if (error->error) {
const char *fmt;
char *msg = errstr;
int len;
int argi;
fmt = SDL_LookupString(error->key);
argi = 0;
while (*fmt && (maxlen > 0)) {
if (*fmt == '%') {
char tmp[32], *spot = tmp;
*spot++ = *fmt++;
while ((*fmt == '.' || (*fmt >= '0' && *fmt <= '9'))
&& spot < (tmp + SDL_arraysize(tmp) - 2)) {
*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 =
SDL_snprintf(msg, maxlen, tmp,
error->args[argi++].value_i);
msg += len;
maxlen -= len;
break;
case 'f':
len =
SDL_snprintf(msg, maxlen, tmp,
error->args[argi++].value_f);
msg += len;
maxlen -= len;
break;
case 'p':
len =
SDL_snprintf(msg, maxlen, tmp,
error->args[argi++].value_ptr);
msg += len;
maxlen -= len;
break;
case 's':
len =
SDL_snprintf(msg, maxlen, tmp,
182
183
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 SDL_GetErrorMsg(errmsg, SDL_ERRBUFIZE);
205
206
}
207
208
void
SDL_ClearError(void)
209
{
210
SDL_error *error;
212
213
error = SDL_GetErrBuf();
error->error = 0;
214
215
216
}
/* Very common errors go here */
217
218
void
SDL_Error(SDL_errorcode code)
219
{
220
221
222
223
224
225
226
227
228
229
230
231
232
switch (code) {
case SDL_ENOMEM:
SDL_SetError("Out of memory");
break;
case SDL_EFREAD:
SDL_SetError("Error reading from datastream");
break;
case SDL_EFWRITE:
SDL_SetError("Error writing to datastream");
break;
case SDL_EFSEEK:
SDL_SetError("Error seeking in datastream");
break;
233
234
235
case SDL_UNSUPPORTED:
SDL_SetError("That operation is not supported");
break;
236
237
238
239
default:
SDL_SetError("Unknown SDL error");
break;
}
240
241
242
}
#ifdef TEST_ERROR
243
244
int
main(int argc, char *argv[])
245
{
246
247
248
249
250
251
252
253
254
255
char buffer[BUFSIZ + 1];
SDL_SetError("Hi there!");
printf("Error 1: %s\n", SDL_GetError());
SDL_ClearError();
SDL_memset(buffer, '1', BUFSIZ);
buffer[BUFSIZ] = 0;
SDL_SetError("This is the error: %s (%f)", buffer, 1.0);
printf("Error 2: %s\n", SDL_GetError());
exit(0);
256
257
}
#endif
259
/* vi: set ts=4 sw=4 expandtab: */