Mercurial > sdl-ios-xcode
annotate src/SDL_error.c @ 1312:c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
I batch edited these files, so please let me know if I've accidentally removed anybody's
credit here.
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Wed, 01 Feb 2006 06:32:25 +0000 |
| parents | f69f4d25fb20 |
| children | 450721ad5436 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
1312
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Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
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3 Copyright (C) 1997-2006 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
|
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 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 | |
|
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Sam Lantinga <slouken@libsdl.org>
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13 Lesser General Public License for more details. |
| 0 | 14 |
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parents:
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15 You should have received a copy of the GNU Lesser General Public |
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c9b51268668f
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Sam Lantinga <slouken@libsdl.org>
parents:
1172
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 /* Simple error handling in SDL */ | |
| 24 | |
| 25 #include <stdio.h> | |
| 26 #include <stdlib.h> | |
| 27 #include <stdarg.h> | |
| 28 #include <string.h> | |
| 29 | |
| 30 #include "SDL_types.h" | |
| 31 #include "SDL_getenv.h" | |
| 32 #include "SDL_error.h" | |
| 33 #include "SDL_error_c.h" | |
| 34 #ifndef DISABLE_THREADS | |
| 35 #include "SDL_thread_c.h" | |
| 36 #endif | |
| 37 | |
| 38 #ifdef DISABLE_THREADS | |
| 39 /* The default (non-thread-safe) global error variable */ | |
| 40 static SDL_error SDL_global_error; | |
| 41 | |
| 42 #define SDL_GetErrBuf() (&SDL_global_error) | |
| 43 #endif /* DISABLE_THREADS */ | |
| 44 | |
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45 #ifdef __CYGWIN__ |
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46 #define DISABLE_STDIO |
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47 #endif |
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48 |
| 0 | 49 #define SDL_ERRBUFIZE 1024 |
| 50 | |
| 51 /* Private functions */ | |
| 52 | |
| 53 static void SDL_LookupString(const Uint8 *key, Uint16 *buf, int buflen) | |
| 54 { | |
| 55 /* FIXME: Add code to lookup key in language string hash-table */ | |
| 56 | |
| 57 /* Key not found in language string hash-table */ | |
| 58 while ( *key && (--buflen > 0) ) { | |
| 59 *buf++ = *key++; | |
| 60 } | |
| 61 *buf = 0; /* NULL terminate string */ | |
| 62 } | |
| 63 | |
| 64 /* Public functions */ | |
| 65 | |
| 66 void SDL_SetError (const char *fmt, ...) | |
| 67 { | |
| 68 va_list ap; | |
| 69 SDL_error *error; | |
| 70 | |
| 71 /* Copy in the key, mark error as valid */ | |
| 72 error = SDL_GetErrBuf(); | |
| 73 error->error = 1; | |
| 74 strncpy((char *)error->key, fmt, sizeof(error->key)); | |
| 75 error->key[sizeof(error->key)-1] = '\0'; | |
| 76 | |
| 77 va_start(ap, fmt); | |
| 78 error->argc = 0; | |
| 79 while ( *fmt ) { | |
| 80 if ( *fmt++ == '%' ) { | |
| 81 switch (*fmt++) { | |
| 82 case 0: /* Malformed format string.. */ | |
| 83 --fmt; | |
| 84 break; | |
| 85 #if 0 /* What is a character anyway? (UNICODE issues) */ | |
| 86 case 'c': | |
| 87 error->args[error->argc++].value_c = | |
| 88 va_arg(ap, unsigned char); | |
| 89 break; | |
| 90 #endif | |
| 91 case 'd': | |
| 92 error->args[error->argc++].value_i = | |
| 93 va_arg(ap, int); | |
| 94 break; | |
| 95 case 'f': | |
| 96 error->args[error->argc++].value_f = | |
| 97 va_arg(ap, double); | |
| 98 break; | |
| 99 case 'p': | |
| 100 error->args[error->argc++].value_ptr = | |
| 101 va_arg(ap, void *); | |
| 102 break; | |
| 103 case 's': | |
| 104 { | |
| 105 int index = error->argc; | |
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106 char *str = va_arg(ap, char *); |
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107 if (str == NULL) |
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108 str = "(null)"; |
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109 strncpy((char *)error->args[index].buf, str, ERR_MAX_STRLEN); |
| 0 | 110 error->args[index].buf[ERR_MAX_STRLEN-1] = 0; |
| 111 error->argc++; | |
| 112 } | |
| 113 break; | |
| 114 default: | |
| 115 break; | |
| 116 } | |
| 117 if ( error->argc >= ERR_MAX_ARGS ) { | |
| 118 break; | |
| 119 } | |
| 120 } | |
| 121 } | |
| 122 va_end(ap); | |
| 123 | |
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124 #ifndef DISABLE_STDIO |
| 0 | 125 /* If we are in debug mode, print out an error message */ |
| 126 #ifdef DEBUG_ERROR | |
| 127 fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError()); | |
| 128 #else | |
| 129 if ( getenv("SDL_DEBUG") ) { | |
| 130 fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError()); | |
| 131 } | |
| 132 #endif | |
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133 #endif /* !DISABLE_STDIO */ |
| 0 | 134 } |
| 135 | |
| 136 /* Print out an integer value to a UNICODE buffer */ | |
| 137 static int PrintInt(Uint16 *str, unsigned int maxlen, int value) | |
| 138 { | |
| 139 char tmp[128]; | |
| 140 int len, i; | |
| 141 | |
| 142 sprintf(tmp, "%d", value); | |
| 143 len = 0; | |
| 144 if ( strlen(tmp) < maxlen ) { | |
| 145 for ( i=0; tmp[i]; ++i ) { | |
| 146 *str++ = tmp[i]; | |
| 147 ++len; | |
| 148 } | |
| 149 } | |
| 150 return(len); | |
| 151 } | |
| 152 /* Print out a double value to a UNICODE buffer */ | |
| 153 static int PrintDouble(Uint16 *str, unsigned int maxlen, double value) | |
| 154 { | |
| 155 char tmp[128]; | |
| 156 int len, i; | |
| 157 | |
| 158 sprintf(tmp, "%f", value); | |
| 159 len = 0; | |
| 160 if ( strlen(tmp) < maxlen ) { | |
| 161 for ( i=0; tmp[i]; ++i ) { | |
| 162 *str++ = tmp[i]; | |
| 163 ++len; | |
| 164 } | |
| 165 } | |
| 166 return(len); | |
| 167 } | |
| 168 /* Print out a pointer value to a UNICODE buffer */ | |
| 169 static int PrintPointer(Uint16 *str, unsigned int maxlen, void *value) | |
| 170 { | |
| 171 char tmp[128]; | |
| 172 int len, i; | |
| 173 | |
| 174 sprintf(tmp, "%p", value); | |
| 175 len = 0; | |
| 176 if ( strlen(tmp) < maxlen ) { | |
| 177 for ( i=0; tmp[i]; ++i ) { | |
| 178 *str++ = tmp[i]; | |
| 179 ++len; | |
| 180 } | |
| 181 } | |
| 182 return(len); | |
| 183 } | |
| 184 | |
| 185 /* This function has a bit more overhead than most error functions | |
| 186 so that it supports internationalization and thread-safe errors. | |
| 187 */ | |
| 188 Uint16 *SDL_GetErrorMsgUNICODE(Uint16 *errstr, unsigned int maxlen) | |
| 189 { | |
| 190 SDL_error *error; | |
| 191 | |
| 192 /* Clear the error string */ | |
| 193 *errstr = 0; --maxlen; | |
| 194 | |
| 195 /* Get the thread-safe error, and print it out */ | |
| 196 error = SDL_GetErrBuf(); | |
| 197 if ( error->error ) { | |
| 198 Uint16 translated[ERR_MAX_STRLEN], *fmt, *msg; | |
| 199 int len; | |
| 200 int argi; | |
| 201 | |
| 202 /* Print out the UNICODE error message */ | |
| 203 SDL_LookupString(error->key, translated, sizeof(translated)); | |
| 204 msg = errstr; | |
| 205 argi = 0; | |
| 206 for ( fmt=translated; *fmt && (maxlen > 0); ) { | |
| 207 if ( *fmt == '%' ) { | |
| 208 switch (fmt[1]) { | |
| 209 case 'S': /* Special SKIP operand */ | |
| 210 argi += (fmt[2] - '0'); | |
| 211 ++fmt; | |
| 212 break; | |
| 213 case '%': | |
| 214 *msg++ = '%'; | |
| 215 maxlen -= 1; | |
| 216 break; | |
| 217 #if 0 /* What is a character anyway? (UNICODE issues) */ | |
| 218 case 'c': | |
| 219 *msg++ = (unsigned char) | |
| 220 error->args[argi++].value_c; | |
| 221 maxlen -= 1; | |
| 222 break; | |
| 223 #endif | |
| 224 case 'd': | |
| 225 len = PrintInt(msg, maxlen, | |
| 226 error->args[argi++].value_i); | |
| 227 msg += len; | |
| 228 maxlen -= len; | |
| 229 break; | |
| 230 case 'f': | |
| 231 len = PrintDouble(msg, maxlen, | |
| 232 error->args[argi++].value_f); | |
| 233 msg += len; | |
| 234 maxlen -= len; | |
| 235 break; | |
| 236 case 'p': | |
| 237 len = PrintPointer(msg, maxlen, | |
| 238 error->args[argi++].value_ptr); | |
| 239 msg += len; | |
| 240 maxlen -= len; | |
| 241 break; | |
| 242 case 's': /* UNICODE string */ | |
| 243 { Uint16 buf[ERR_MAX_STRLEN], *str; | |
| 244 SDL_LookupString(error->args[argi++].buf, buf, sizeof(buf)); | |
| 245 str = buf; | |
| 246 while ( *str && (maxlen > 0) ) { | |
| 247 *msg++ = *str++; | |
| 248 maxlen -= 1; | |
| 249 } | |
| 250 } | |
| 251 break; | |
| 252 } | |
| 253 fmt += 2; | |
| 254 } else { | |
| 255 *msg++ = *fmt++; | |
| 256 maxlen -= 1; | |
| 257 } | |
| 258 } | |
| 259 *msg = 0; /* NULL terminate the string */ | |
| 260 } | |
| 261 return(errstr); | |
| 262 } | |
| 263 | |
| 264 Uint8 *SDL_GetErrorMsg(Uint8 *errstr, unsigned int maxlen) | |
| 265 { | |
| 266 Uint16 *errstr16; | |
| 267 unsigned int i; | |
| 268 | |
| 269 /* Allocate the UNICODE buffer */ | |
| 270 errstr16 = (Uint16 *)malloc(maxlen * (sizeof *errstr16)); | |
| 271 if ( ! errstr16 ) { | |
| 272 strncpy((char *)errstr, "Out of memory", maxlen); | |
| 273 errstr[maxlen-1] = '\0'; | |
| 274 return(errstr); | |
| 275 } | |
| 276 | |
| 277 /* Get the error message */ | |
| 278 SDL_GetErrorMsgUNICODE(errstr16, maxlen); | |
| 279 | |
| 280 /* Convert from UNICODE to Latin1 encoding */ | |
| 281 for ( i=0; i<maxlen; ++i ) { | |
| 282 errstr[i] = (Uint8)errstr16[i]; | |
| 283 } | |
| 284 | |
| 285 /* Free UNICODE buffer (if necessary) */ | |
| 286 free(errstr16); | |
| 287 | |
| 288 return(errstr); | |
| 289 } | |
| 290 | |
| 291 /* Available for backwards compatibility */ | |
| 292 char *SDL_GetError (void) | |
| 293 { | |
| 294 static char errmsg[SDL_ERRBUFIZE]; | |
| 295 | |
| 296 return((char *)SDL_GetErrorMsg((unsigned char *)errmsg, SDL_ERRBUFIZE)); | |
| 297 } | |
| 298 | |
| 299 void SDL_ClearError(void) | |
| 300 { | |
| 301 SDL_error *error; | |
| 302 | |
| 303 error = SDL_GetErrBuf(); | |
| 304 error->error = 0; | |
| 305 } | |
| 306 | |
| 307 /* Very common errors go here */ | |
| 308 void SDL_Error(SDL_errorcode code) | |
| 309 { | |
| 310 switch (code) { | |
| 311 case SDL_ENOMEM: | |
| 312 SDL_SetError("Out of memory"); | |
| 313 break; | |
| 314 case SDL_EFREAD: | |
| 315 SDL_SetError("Error reading from datastream"); | |
| 316 break; | |
| 317 case SDL_EFWRITE: | |
| 318 SDL_SetError("Error writing to datastream"); | |
| 319 break; | |
| 320 case SDL_EFSEEK: | |
| 321 SDL_SetError("Error seeking in datastream"); | |
| 322 break; | |
| 323 default: | |
| 324 SDL_SetError("Unknown SDL error"); | |
| 325 break; | |
| 326 } | |
| 327 } | |
| 328 | |
| 329 #ifdef TEST_ERROR | |
| 330 int main(int argc, char *argv[]) | |
| 331 { | |
| 332 char buffer[BUFSIZ+1]; | |
| 333 | |
| 334 SDL_SetError("Hi there!"); | |
| 335 printf("Error 1: %s\n", SDL_GetError()); | |
| 336 SDL_ClearError(); | |
| 337 memset(buffer, '1', BUFSIZ); | |
| 338 buffer[BUFSIZ] = 0; | |
| 339 SDL_SetError("This is the error: %s (%f)", buffer, 1.0); | |
| 340 printf("Error 2: %s\n", SDL_GetError()); | |
| 341 exit(0); | |
| 342 } | |
| 343 #endif |