Mercurial > sdl-ios-xcode
annotate src/SDL_error.c @ 4976:3811132c584f
Added information about starting a command shell on the device
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 12 Jan 2011 12:40:11 -0800 |
parents | ba7492f9e2b8 |
children | be4ba07d9867 |
rev | line source |
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0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
3697 | 3 Copyright (C) 1997-2010 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 /*#define DEBUG_ERROR*/ |
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30 |
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31 /* Routine to get the thread-specific error variable */ |
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32 #if SDL_THREADS_DISABLED |
4627 | 33 /* The default (non-thread-safe) global error variable */ |
0 | 34 static SDL_error SDL_global_error; |
35 #define SDL_GetErrBuf() (&SDL_global_error) | |
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36 #else |
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37 extern SDL_error *SDL_GetErrBuf(void); |
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38 #endif /* SDL_THREADS_DISABLED */ |
0 | 39 |
40 #define SDL_ERRBUFIZE 1024 | |
41 | |
42 /* Private functions */ | |
43 | |
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44 static const char * |
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45 SDL_LookupString(const char *key) |
0 | 46 { |
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47 /* FIXME: Add code to lookup key in language string hash-table */ |
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48 return key; |
0 | 49 } |
50 | |
51 /* Public functions */ | |
52 | |
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53 void |
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54 SDL_SetError(const char *fmt, ...) |
0 | 55 { |
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56 va_list ap; |
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57 SDL_error *error; |
0 | 58 |
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59 /* Copy in the key, mark error as valid */ |
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60 error = SDL_GetErrBuf(); |
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61 error->error = 1; |
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62 SDL_strlcpy((char *) error->key, fmt, sizeof(error->key)); |
0 | 63 |
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64 va_start(ap, fmt); |
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65 error->argc = 0; |
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66 while (*fmt) { |
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67 if (*fmt++ == '%') { |
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68 while (*fmt == '.' || (*fmt >= '0' && *fmt <= '9')) { |
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69 ++fmt; |
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70 } |
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71 switch (*fmt++) { |
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72 case 0: /* Malformed format string.. */ |
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73 --fmt; |
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74 break; |
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75 case 'c': |
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76 case 'i': |
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77 case 'd': |
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78 case 'u': |
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79 case 'o': |
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80 case 'x': |
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81 case 'X': |
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82 error->args[error->argc++].value_i = va_arg(ap, int); |
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83 break; |
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84 case 'f': |
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85 error->args[error->argc++].value_f = va_arg(ap, double); |
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86 break; |
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87 case 'p': |
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88 error->args[error->argc++].value_ptr = va_arg(ap, void *); |
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89 break; |
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90 case 's': |
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91 { |
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92 int i = error->argc; |
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93 const char *str = va_arg(ap, const char *); |
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94 if (str == NULL) |
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95 str = "(null)"; |
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96 SDL_strlcpy((char *) error->args[i].buf, str, |
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97 ERR_MAX_STRLEN); |
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98 error->argc++; |
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99 } |
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100 break; |
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101 default: |
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102 break; |
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103 } |
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104 if (error->argc >= ERR_MAX_ARGS) { |
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105 break; |
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106 } |
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107 } |
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108 } |
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109 va_end(ap); |
0 | 110 |
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111 /* If we are in debug mode, print out an error message */ |
0 | 112 #ifdef DEBUG_ERROR |
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113 fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError()); |
0 | 114 #endif |
115 } | |
116 | |
117 /* This function has a bit more overhead than most error functions | |
118 so that it supports internationalization and thread-safe errors. | |
119 */ | |
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120 static char * |
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121 SDL_GetErrorMsg(char *errstr, unsigned int maxlen) |
0 | 122 { |
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123 SDL_error *error; |
0 | 124 |
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125 /* Clear the error string */ |
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126 *errstr = '\0'; |
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127 --maxlen; |
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128 |
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129 /* Get the thread-safe error, and print it out */ |
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130 error = SDL_GetErrBuf(); |
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131 if (error->error) { |
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132 const char *fmt; |
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133 char *msg = errstr; |
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134 int len; |
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135 int argi; |
0 | 136 |
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137 fmt = SDL_LookupString(error->key); |
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138 argi = 0; |
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139 while (*fmt && (maxlen > 0)) { |
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140 if (*fmt == '%') { |
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141 char tmp[32], *spot = tmp; |
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142 *spot++ = *fmt++; |
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143 while ((*fmt == '.' || (*fmt >= '0' && *fmt <= '9')) |
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144 && spot < (tmp + SDL_arraysize(tmp) - 2)) { |
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145 *spot++ = *fmt++; |
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146 } |
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147 *spot++ = *fmt++; |
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148 *spot++ = '\0'; |
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149 switch (spot[-2]) { |
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150 case '%': |
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151 *msg++ = '%'; |
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152 maxlen -= 1; |
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153 break; |
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154 case 'c': |
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155 case 'i': |
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156 case 'd': |
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157 case 'u': |
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158 case 'o': |
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159 case 'x': |
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160 case 'X': |
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161 len = |
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162 SDL_snprintf(msg, maxlen, tmp, |
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163 error->args[argi++].value_i); |
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164 msg += len; |
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165 maxlen -= len; |
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166 break; |
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167 case 'f': |
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168 len = |
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169 SDL_snprintf(msg, maxlen, tmp, |
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170 error->args[argi++].value_f); |
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171 msg += len; |
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172 maxlen -= len; |
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173 break; |
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174 case 'p': |
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175 len = |
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176 SDL_snprintf(msg, maxlen, tmp, |
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177 error->args[argi++].value_ptr); |
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178 msg += len; |
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179 maxlen -= len; |
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180 break; |
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181 case 's': |
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182 len = |
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183 SDL_snprintf(msg, maxlen, tmp, |
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184 SDL_LookupString(error->args[argi++]. |
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185 buf)); |
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186 msg += len; |
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187 maxlen -= len; |
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188 break; |
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189 } |
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190 } else { |
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191 *msg++ = *fmt++; |
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192 maxlen -= 1; |
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193 } |
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194 } |
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195 *msg = 0; /* NULL terminate the string */ |
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196 } |
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197 return (errstr); |
0 | 198 } |
199 | |
200 /* Available for backwards compatibility */ | |
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201 const char * |
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202 SDL_GetError(void) |
0 | 203 { |
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204 static char errmsg[SDL_ERRBUFIZE]; |
0 | 205 |
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206 return SDL_GetErrorMsg(errmsg, SDL_ERRBUFIZE); |
0 | 207 } |
208 | |
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209 void |
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210 SDL_ClearError(void) |
0 | 211 { |
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212 SDL_error *error; |
0 | 213 |
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214 error = SDL_GetErrBuf(); |
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215 error->error = 0; |
0 | 216 } |
217 | |
218 /* Very common errors go here */ | |
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219 void |
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220 SDL_Error(SDL_errorcode code) |
0 | 221 { |
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222 switch (code) { |
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223 case SDL_ENOMEM: |
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224 SDL_SetError("Out of memory"); |
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225 break; |
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226 case SDL_EFREAD: |
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227 SDL_SetError("Error reading from datastream"); |
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228 break; |
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229 case SDL_EFWRITE: |
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230 SDL_SetError("Error writing to datastream"); |
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231 break; |
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232 case SDL_EFSEEK: |
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233 SDL_SetError("Error seeking in datastream"); |
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234 break; |
3317 | 235 case SDL_UNSUPPORTED: |
236 SDL_SetError("That operation is not supported"); | |
237 break; | |
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238 default: |
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239 SDL_SetError("Unknown SDL error"); |
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240 break; |
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241 } |
0 | 242 } |
243 | |
244 #ifdef TEST_ERROR | |
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245 int |
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246 main(int argc, char *argv[]) |
0 | 247 { |
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248 char buffer[BUFSIZ + 1]; |
0 | 249 |
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250 SDL_SetError("Hi there!"); |
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251 printf("Error 1: %s\n", SDL_GetError()); |
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252 SDL_ClearError(); |
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253 SDL_memset(buffer, '1', BUFSIZ); |
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254 buffer[BUFSIZ] = 0; |
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255 SDL_SetError("This is the error: %s (%f)", buffer, 1.0); |
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256 printf("Error 2: %s\n", SDL_GetError()); |
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257 exit(0); |
0 | 258 } |
259 #endif | |
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260 /* vi: set ts=4 sw=4 expandtab: */ |