Mercurial > sdl-ios-xcode
annotate src/SDL_error.c @ 4068:86746036a6d6 SDL-1.2
I think this fixes bug #454
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sun, 15 Jul 2007 14:05:31 +0000 |
| parents | 845bcffc0dd8 |
| children | c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
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Updated copyright information and removed rcs id lines (problematic in branch merges)
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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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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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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 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* Simple error handling in SDL */ | |
| 25 | |
| 26 #include "SDL_error.h" | |
| 27 #include "SDL_error_c.h" | |
| 28 | |
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29 /* Routine to get the thread-specific error variable */ |
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30 #if SDL_THREADS_DISABLED |
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31 /* The SDL_arraysize(The ),default (non-thread-safe) global error variable */ |
| 0 | 32 static SDL_error SDL_global_error; |
| 33 #define SDL_GetErrBuf() (&SDL_global_error) | |
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34 #else |
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35 extern SDL_error *SDL_GetErrBuf(void); |
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36 #endif /* SDL_THREADS_DISABLED */ |
| 0 | 37 |
| 38 #define SDL_ERRBUFIZE 1024 | |
| 39 | |
| 40 /* Private functions */ | |
| 41 | |
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42 static const char *SDL_LookupString(const char *key) |
| 0 | 43 { |
| 44 /* FIXME: Add code to lookup key in language string hash-table */ | |
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45 return key; |
| 0 | 46 } |
| 47 | |
| 48 /* Public functions */ | |
| 49 | |
| 50 void SDL_SetError (const char *fmt, ...) | |
| 51 { | |
| 52 va_list ap; | |
| 53 SDL_error *error; | |
| 54 | |
| 55 /* Copy in the key, mark error as valid */ | |
| 56 error = SDL_GetErrBuf(); | |
| 57 error->error = 1; | |
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Use only safe string functions
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58 SDL_strlcpy((char *)error->key, fmt, sizeof(error->key)); |
| 0 | 59 |
| 60 va_start(ap, fmt); | |
| 61 error->argc = 0; | |
| 62 while ( *fmt ) { | |
| 63 if ( *fmt++ == '%' ) { | |
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64 while ( *fmt == '.' || (*fmt >= '0' && *fmt <= '9') ) { |
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65 ++fmt; |
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66 } |
| 0 | 67 switch (*fmt++) { |
| 68 case 0: /* Malformed format string.. */ | |
| 69 --fmt; | |
| 70 break; | |
| 71 case 'c': | |
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72 case 'i': |
| 0 | 73 case 'd': |
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74 case 'u': |
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75 case 'o': |
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76 case 'x': |
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77 case 'X': |
| 0 | 78 error->args[error->argc++].value_i = |
| 79 va_arg(ap, int); | |
| 80 break; | |
| 81 case 'f': | |
| 82 error->args[error->argc++].value_f = | |
| 83 va_arg(ap, double); | |
| 84 break; | |
| 85 case 'p': | |
| 86 error->args[error->argc++].value_ptr = | |
| 87 va_arg(ap, void *); | |
| 88 break; | |
| 89 case 's': | |
| 90 { | |
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Fixed some ultra-pedantic gcc warnings
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91 int i = error->argc; |
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92 const char *str = va_arg(ap, const char *); |
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Don't crash if a NULL is passed for a "%s" parameter to SDL_SetError(),
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93 if (str == NULL) |
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94 str = "(null)"; |
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95 SDL_strlcpy((char *)error->args[i].buf, str, ERR_MAX_STRLEN); |
| 0 | 96 error->argc++; |
| 97 } | |
| 98 break; | |
| 99 default: | |
| 100 break; | |
| 101 } | |
| 102 if ( error->argc >= ERR_MAX_ARGS ) { | |
| 103 break; | |
| 104 } | |
| 105 } | |
| 106 } | |
| 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 #endif | |
| 113 } | |
| 114 | |
| 115 /* This function has a bit more overhead than most error functions | |
| 116 so that it supports internationalization and thread-safe errors. | |
| 117 */ | |
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118 char *SDL_GetErrorMsg(char *errstr, unsigned int maxlen) |
| 0 | 119 { |
| 120 SDL_error *error; | |
| 121 | |
| 122 /* Clear the error string */ | |
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123 *errstr = '\0'; --maxlen; |
| 0 | 124 |
| 125 /* Get the thread-safe error, and print it out */ | |
| 126 error = SDL_GetErrBuf(); | |
| 127 if ( error->error ) { | |
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128 const char *fmt; |
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129 char *msg = errstr; |
| 0 | 130 int len; |
| 131 int argi; | |
| 132 | |
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133 fmt = SDL_LookupString(error->key); |
| 0 | 134 argi = 0; |
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135 while ( *fmt && (maxlen > 0) ) { |
| 0 | 136 if ( *fmt == '%' ) { |
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137 char tmp[32], *spot = tmp; |
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138 *spot++ = *fmt++; |
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139 while ( (*fmt == '.' || (*fmt >= '0' && *fmt <= '9')) && spot < (tmp+SDL_arraysize(tmp)-2) ) { |
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140 *spot++ = *fmt++; |
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141 } |
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142 *spot++ = *fmt++; |
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143 *spot++ = '\0'; |
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144 switch (spot[-2]) { |
| 0 | 145 case '%': |
| 146 *msg++ = '%'; | |
| 147 maxlen -= 1; | |
| 148 break; | |
| 149 case 'c': | |
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150 case 'i': |
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151 case 'd': |
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152 case 'u': |
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153 case 'o': |
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154 case 'x': |
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155 case 'X': |
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156 len = SDL_snprintf(msg, maxlen, tmp, error->args[argi++].value_i); |
| 0 | 157 msg += len; |
| 158 maxlen -= len; | |
| 159 break; | |
| 160 case 'f': | |
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161 len = SDL_snprintf(msg, maxlen, tmp, error->args[argi++].value_f); |
| 0 | 162 msg += len; |
| 163 maxlen -= len; | |
| 164 break; | |
| 165 case 'p': | |
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166 len = SDL_snprintf(msg, maxlen, tmp, error->args[argi++].value_ptr); |
| 0 | 167 msg += len; |
| 168 maxlen -= len; | |
| 169 break; | |
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170 case 's': |
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171 len = SDL_snprintf(msg, maxlen, tmp, SDL_LookupString(error->args[argi++].buf)); |
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172 msg += len; |
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173 maxlen -= len; |
| 0 | 174 break; |
| 175 } | |
| 176 } else { | |
| 177 *msg++ = *fmt++; | |
| 178 maxlen -= 1; | |
| 179 } | |
| 180 } | |
| 181 *msg = 0; /* NULL terminate the string */ | |
| 182 } | |
| 183 return(errstr); | |
| 184 } | |
| 185 | |
| 186 /* Available for backwards compatibility */ | |
| 187 char *SDL_GetError (void) | |
| 188 { | |
| 189 static char errmsg[SDL_ERRBUFIZE]; | |
| 190 | |
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191 return((char *)SDL_GetErrorMsg(errmsg, SDL_ERRBUFIZE)); |
| 0 | 192 } |
| 193 | |
| 194 void SDL_ClearError(void) | |
| 195 { | |
| 196 SDL_error *error; | |
| 197 | |
| 198 error = SDL_GetErrBuf(); | |
| 199 error->error = 0; | |
| 200 } | |
| 201 | |
| 202 /* Very common errors go here */ | |
| 203 void SDL_Error(SDL_errorcode code) | |
| 204 { | |
| 205 switch (code) { | |
| 206 case SDL_ENOMEM: | |
| 207 SDL_SetError("Out of memory"); | |
| 208 break; | |
| 209 case SDL_EFREAD: | |
| 210 SDL_SetError("Error reading from datastream"); | |
| 211 break; | |
| 212 case SDL_EFWRITE: | |
| 213 SDL_SetError("Error writing to datastream"); | |
| 214 break; | |
| 215 case SDL_EFSEEK: | |
| 216 SDL_SetError("Error seeking in datastream"); | |
| 217 break; | |
| 218 default: | |
| 219 SDL_SetError("Unknown SDL error"); | |
| 220 break; | |
| 221 } | |
| 222 } | |
| 223 | |
| 224 #ifdef TEST_ERROR | |
| 225 int main(int argc, char *argv[]) | |
| 226 { | |
| 227 char buffer[BUFSIZ+1]; | |
| 228 | |
| 229 SDL_SetError("Hi there!"); | |
| 230 printf("Error 1: %s\n", SDL_GetError()); | |
| 231 SDL_ClearError(); | |
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232 SDL_memset(buffer, '1', BUFSIZ); |
| 0 | 233 buffer[BUFSIZ] = 0; |
| 234 SDL_SetError("This is the error: %s (%f)", buffer, 1.0); | |
| 235 printf("Error 2: %s\n", SDL_GetError()); | |
| 236 exit(0); | |
| 237 } | |
| 238 #endif |