Mercurial > sdl-ios-xcode
annotate src/SDL_error.c @ 3950:9d9e15ab1697 SDL-1.2
Check if yasm supports a nasm-specific syntax we use (it doesn't in 0.5.0,
which is still common in Linux distros, and does in 0.6.0). Disable it if we
don't, attempting to fallback to using nasm. Thanks to Mike Frysinger for the
patch.
Fixes Bugzilla #393.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 04 Jun 2007 11:06:48 +0000 |
| parents | 845bcffc0dd8 |
| children | c121d94672cb a1b03ba2fcd0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
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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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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 |