Mercurial > sdl-ios-xcode
annotate src/SDL_error.c @ 298:440a7e499465
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author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 06 Mar 2002 11:32:00 +0000 |
parents | f6ffac90895c |
children | b8d311d90021 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
6 modify it under the terms of the GNU Library General Public | |
7 License as published by the Free Software Foundation; either | |
8 version 2 of the License, or (at your option) any later version. | |
9 | |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 Library General Public License for more details. | |
14 | |
15 You should have received a copy of the GNU Library General Public | |
16 License along with this library; if not, write to the Free | |
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | |
19 Sam Lantinga | |
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20 slouken@libsdl.org |
0 | 21 */ |
22 | |
23 #ifdef SAVE_RCSID | |
24 static char rcsid = | |
25 "@(#) $Id$"; | |
26 #endif | |
27 | |
28 /* Simple error handling in SDL */ | |
29 | |
30 #include <stdio.h> | |
31 #include <stdlib.h> | |
32 #include <stdarg.h> | |
33 #include <string.h> | |
34 | |
35 #include "SDL_types.h" | |
36 #include "SDL_getenv.h" | |
37 #include "SDL_error.h" | |
38 #include "SDL_error_c.h" | |
39 #ifndef DISABLE_THREADS | |
40 #include "SDL_thread_c.h" | |
41 #endif | |
42 | |
43 #ifdef DISABLE_THREADS | |
44 /* The default (non-thread-safe) global error variable */ | |
45 static SDL_error SDL_global_error; | |
46 | |
47 #define SDL_GetErrBuf() (&SDL_global_error) | |
48 #endif /* DISABLE_THREADS */ | |
49 | |
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50 #ifdef __CYGWIN__ |
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51 #define DISABLE_STDIO |
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52 #endif |
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53 |
0 | 54 #define SDL_ERRBUFIZE 1024 |
55 | |
56 /* Private functions */ | |
57 | |
58 static void SDL_LookupString(const Uint8 *key, Uint16 *buf, int buflen) | |
59 { | |
60 /* FIXME: Add code to lookup key in language string hash-table */ | |
61 | |
62 /* Key not found in language string hash-table */ | |
63 while ( *key && (--buflen > 0) ) { | |
64 *buf++ = *key++; | |
65 } | |
66 *buf = 0; /* NULL terminate string */ | |
67 } | |
68 | |
69 /* Public functions */ | |
70 | |
71 void SDL_SetError (const char *fmt, ...) | |
72 { | |
73 va_list ap; | |
74 SDL_error *error; | |
75 | |
76 /* Copy in the key, mark error as valid */ | |
77 error = SDL_GetErrBuf(); | |
78 error->error = 1; | |
79 strncpy((char *)error->key, fmt, sizeof(error->key)); | |
80 error->key[sizeof(error->key)-1] = '\0'; | |
81 | |
82 va_start(ap, fmt); | |
83 error->argc = 0; | |
84 while ( *fmt ) { | |
85 if ( *fmt++ == '%' ) { | |
86 switch (*fmt++) { | |
87 case 0: /* Malformed format string.. */ | |
88 --fmt; | |
89 break; | |
90 #if 0 /* What is a character anyway? (UNICODE issues) */ | |
91 case 'c': | |
92 error->args[error->argc++].value_c = | |
93 va_arg(ap, unsigned char); | |
94 break; | |
95 #endif | |
96 case 'd': | |
97 error->args[error->argc++].value_i = | |
98 va_arg(ap, int); | |
99 break; | |
100 case 'f': | |
101 error->args[error->argc++].value_f = | |
102 va_arg(ap, double); | |
103 break; | |
104 case 'p': | |
105 error->args[error->argc++].value_ptr = | |
106 va_arg(ap, void *); | |
107 break; | |
108 case 's': | |
109 { | |
110 int index = error->argc; | |
111 strncpy((char *)error->args[index].buf, | |
112 va_arg(ap, char *), ERR_MAX_STRLEN); | |
113 error->args[index].buf[ERR_MAX_STRLEN-1] = 0; | |
114 error->argc++; | |
115 } | |
116 break; | |
117 default: | |
118 break; | |
119 } | |
120 if ( error->argc >= ERR_MAX_ARGS ) { | |
121 break; | |
122 } | |
123 } | |
124 } | |
125 va_end(ap); | |
126 | |
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127 #ifndef DISABLE_STDIO |
0 | 128 /* If we are in debug mode, print out an error message */ |
129 #ifdef DEBUG_ERROR | |
130 fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError()); | |
131 #else | |
132 if ( getenv("SDL_DEBUG") ) { | |
133 fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError()); | |
134 } | |
135 #endif | |
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136 #endif /* !DISABLE_STDIO */ |
0 | 137 } |
138 | |
139 /* Print out an integer value to a UNICODE buffer */ | |
140 static int PrintInt(Uint16 *str, unsigned int maxlen, int value) | |
141 { | |
142 char tmp[128]; | |
143 int len, i; | |
144 | |
145 sprintf(tmp, "%d", value); | |
146 len = 0; | |
147 if ( strlen(tmp) < maxlen ) { | |
148 for ( i=0; tmp[i]; ++i ) { | |
149 *str++ = tmp[i]; | |
150 ++len; | |
151 } | |
152 } | |
153 return(len); | |
154 } | |
155 /* Print out a double value to a UNICODE buffer */ | |
156 static int PrintDouble(Uint16 *str, unsigned int maxlen, double value) | |
157 { | |
158 char tmp[128]; | |
159 int len, i; | |
160 | |
161 sprintf(tmp, "%f", value); | |
162 len = 0; | |
163 if ( strlen(tmp) < maxlen ) { | |
164 for ( i=0; tmp[i]; ++i ) { | |
165 *str++ = tmp[i]; | |
166 ++len; | |
167 } | |
168 } | |
169 return(len); | |
170 } | |
171 /* Print out a pointer value to a UNICODE buffer */ | |
172 static int PrintPointer(Uint16 *str, unsigned int maxlen, void *value) | |
173 { | |
174 char tmp[128]; | |
175 int len, i; | |
176 | |
177 sprintf(tmp, "%p", value); | |
178 len = 0; | |
179 if ( strlen(tmp) < maxlen ) { | |
180 for ( i=0; tmp[i]; ++i ) { | |
181 *str++ = tmp[i]; | |
182 ++len; | |
183 } | |
184 } | |
185 return(len); | |
186 } | |
187 | |
188 /* This function has a bit more overhead than most error functions | |
189 so that it supports internationalization and thread-safe errors. | |
190 */ | |
191 Uint16 *SDL_GetErrorMsgUNICODE(Uint16 *errstr, unsigned int maxlen) | |
192 { | |
193 SDL_error *error; | |
194 | |
195 /* Clear the error string */ | |
196 *errstr = 0; --maxlen; | |
197 | |
198 /* Get the thread-safe error, and print it out */ | |
199 error = SDL_GetErrBuf(); | |
200 if ( error->error ) { | |
201 Uint16 translated[ERR_MAX_STRLEN], *fmt, *msg; | |
202 int len; | |
203 int argi; | |
204 | |
205 /* Print out the UNICODE error message */ | |
206 SDL_LookupString(error->key, translated, sizeof(translated)); | |
207 msg = errstr; | |
208 argi = 0; | |
209 for ( fmt=translated; *fmt && (maxlen > 0); ) { | |
210 if ( *fmt == '%' ) { | |
211 switch (fmt[1]) { | |
212 case 'S': /* Special SKIP operand */ | |
213 argi += (fmt[2] - '0'); | |
214 ++fmt; | |
215 break; | |
216 case '%': | |
217 *msg++ = '%'; | |
218 maxlen -= 1; | |
219 break; | |
220 #if 0 /* What is a character anyway? (UNICODE issues) */ | |
221 case 'c': | |
222 *msg++ = (unsigned char) | |
223 error->args[argi++].value_c; | |
224 maxlen -= 1; | |
225 break; | |
226 #endif | |
227 case 'd': | |
228 len = PrintInt(msg, maxlen, | |
229 error->args[argi++].value_i); | |
230 msg += len; | |
231 maxlen -= len; | |
232 break; | |
233 case 'f': | |
234 len = PrintDouble(msg, maxlen, | |
235 error->args[argi++].value_f); | |
236 msg += len; | |
237 maxlen -= len; | |
238 break; | |
239 case 'p': | |
240 len = PrintPointer(msg, maxlen, | |
241 error->args[argi++].value_ptr); | |
242 msg += len; | |
243 maxlen -= len; | |
244 break; | |
245 case 's': /* UNICODE string */ | |
246 { Uint16 buf[ERR_MAX_STRLEN], *str; | |
247 SDL_LookupString(error->args[argi++].buf, buf, sizeof(buf)); | |
248 str = buf; | |
249 while ( *str && (maxlen > 0) ) { | |
250 *msg++ = *str++; | |
251 maxlen -= 1; | |
252 } | |
253 } | |
254 break; | |
255 } | |
256 fmt += 2; | |
257 } else { | |
258 *msg++ = *fmt++; | |
259 maxlen -= 1; | |
260 } | |
261 } | |
262 *msg = 0; /* NULL terminate the string */ | |
263 } | |
264 return(errstr); | |
265 } | |
266 | |
267 Uint8 *SDL_GetErrorMsg(Uint8 *errstr, unsigned int maxlen) | |
268 { | |
269 Uint16 *errstr16; | |
270 unsigned int i; | |
271 | |
272 /* Allocate the UNICODE buffer */ | |
273 errstr16 = (Uint16 *)malloc(maxlen * (sizeof *errstr16)); | |
274 if ( ! errstr16 ) { | |
275 strncpy((char *)errstr, "Out of memory", maxlen); | |
276 errstr[maxlen-1] = '\0'; | |
277 return(errstr); | |
278 } | |
279 | |
280 /* Get the error message */ | |
281 SDL_GetErrorMsgUNICODE(errstr16, maxlen); | |
282 | |
283 /* Convert from UNICODE to Latin1 encoding */ | |
284 for ( i=0; i<maxlen; ++i ) { | |
285 errstr[i] = (Uint8)errstr16[i]; | |
286 } | |
287 | |
288 /* Free UNICODE buffer (if necessary) */ | |
289 free(errstr16); | |
290 | |
291 return(errstr); | |
292 } | |
293 | |
294 /* Available for backwards compatibility */ | |
295 char *SDL_GetError (void) | |
296 { | |
297 static char errmsg[SDL_ERRBUFIZE]; | |
298 | |
299 return((char *)SDL_GetErrorMsg((unsigned char *)errmsg, SDL_ERRBUFIZE)); | |
300 } | |
301 | |
302 void SDL_ClearError(void) | |
303 { | |
304 SDL_error *error; | |
305 | |
306 error = SDL_GetErrBuf(); | |
307 error->error = 0; | |
308 } | |
309 | |
310 /* Very common errors go here */ | |
311 void SDL_Error(SDL_errorcode code) | |
312 { | |
313 switch (code) { | |
314 case SDL_ENOMEM: | |
315 SDL_SetError("Out of memory"); | |
316 break; | |
317 case SDL_EFREAD: | |
318 SDL_SetError("Error reading from datastream"); | |
319 break; | |
320 case SDL_EFWRITE: | |
321 SDL_SetError("Error writing to datastream"); | |
322 break; | |
323 case SDL_EFSEEK: | |
324 SDL_SetError("Error seeking in datastream"); | |
325 break; | |
326 default: | |
327 SDL_SetError("Unknown SDL error"); | |
328 break; | |
329 } | |
330 } | |
331 | |
332 #ifdef TEST_ERROR | |
333 int main(int argc, char *argv[]) | |
334 { | |
335 char buffer[BUFSIZ+1]; | |
336 | |
337 SDL_SetError("Hi there!"); | |
338 printf("Error 1: %s\n", SDL_GetError()); | |
339 SDL_ClearError(); | |
340 memset(buffer, '1', BUFSIZ); | |
341 buffer[BUFSIZ] = 0; | |
342 SDL_SetError("This is the error: %s (%f)", buffer, 1.0); | |
343 printf("Error 2: %s\n", SDL_GetError()); | |
344 exit(0); | |
345 } | |
346 #endif |