annotate src/SDL_error.c @ 1659:14717b52abc0 SDL-1.3

Merge trunk-1.3-3
author Sam Lantinga <slouken@libsdl.org>
date Wed, 17 May 2006 08:18:28 +0000
parents 97d0966f4bf7
children 782fd950bd46
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 Sam Lantinga
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4
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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
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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.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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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
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22 #include "SDL_config.h"
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23
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24 /* Simple error handling in SDL */
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25
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26 #include "SDL_error.h"
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27 #include "SDL_error_c.h"
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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 */
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32 static SDL_error SDL_global_error;
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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 */
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37
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38 #define SDL_ERRBUFIZE 1024
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39
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40 /* Private functions */
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41
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42 static const char *SDL_LookupString(const char *key)
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43 {
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44 /* FIXME: Add code to lookup key in language string hash-table */
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45 return key;
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46 }
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47
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48 /* Public functions */
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49
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50 void SDL_SetError (const char *fmt, ...)
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51 {
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52 va_list ap;
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53 SDL_error *error;
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54
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55 /* Copy in the key, mark error as valid */
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56 error = SDL_GetErrBuf();
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57 error->error = 1;
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58 SDL_strlcpy((char *)error->key, fmt, sizeof(error->key));
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59
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60 va_start(ap, fmt);
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61 error->argc = 0;
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62 while ( *fmt ) {
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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 }
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67 switch (*fmt++) {
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68 case 0: /* Malformed format string.. */
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69 --fmt;
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70 break;
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71 case 'c':
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72 case 'i':
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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':
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78 error->args[error->argc++].value_i =
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79 va_arg(ap, int);
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80 break;
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81 case 'f':
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82 error->args[error->argc++].value_f =
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83 va_arg(ap, double);
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84 break;
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85 case 'p':
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86 error->args[error->argc++].value_ptr =
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87 va_arg(ap, void *);
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88 break;
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89 case 's':
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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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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);
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96 error->argc++;
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97 }
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98 break;
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99 default:
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100 break;
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101 }
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102 if ( error->argc >= ERR_MAX_ARGS ) {
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103 break;
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104 }
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105 }
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106 }
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107 va_end(ap);
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108
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109 /* If we are in debug mode, print out an error message */
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110 #ifdef DEBUG_ERROR
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111 fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError());
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112 #endif
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113 }
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114
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115 /* This function has a bit more overhead than most error functions
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116 so that it supports internationalization and thread-safe errors.
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117 */
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118 char *SDL_GetErrorMsg(char *errstr, unsigned int maxlen)
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119 {
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120 SDL_error *error;
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121
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122 /* Clear the error string */
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123 *errstr = '\0'; --maxlen;
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124
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125 /* Get the thread-safe error, and print it out */
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126 error = SDL_GetErrBuf();
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127 if ( error->error ) {
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128 const char *fmt;
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129 char *msg = errstr;
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130 int len;
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131 int argi;
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132
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133 fmt = SDL_LookupString(error->key);
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134 argi = 0;
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135 while ( *fmt && (maxlen > 0) ) {
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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]) {
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145 case '%':
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146 *msg++ = '%';
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147 maxlen -= 1;
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148 break;
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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
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157 msg += len;
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158 maxlen -= len;
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159 break;
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160 case 'f':
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161 len = SDL_snprintf(msg, maxlen, tmp, error->args[argi++].value_f);
0
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162 msg += len;
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163 maxlen -= len;
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164 break;
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165 case 'p':
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166 len = SDL_snprintf(msg, maxlen, tmp, error->args[argi++].value_ptr);
0
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167 msg += len;
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168 maxlen -= len;
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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
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174 break;
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175 }
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176 } else {
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177 *msg++ = *fmt++;
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178 maxlen -= 1;
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179 }
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180 }
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181 *msg = 0; /* NULL terminate the string */
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182 }
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183 return(errstr);
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184 }
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185
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186 /* Available for backwards compatibility */
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187 char *SDL_GetError (void)
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188 {
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189 static char errmsg[SDL_ERRBUFIZE];
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190
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191 return((char *)SDL_GetErrorMsg(errmsg, SDL_ERRBUFIZE));
0
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192 }
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193
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194 void SDL_ClearError(void)
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195 {
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196 SDL_error *error;
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197
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198 error = SDL_GetErrBuf();
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199 error->error = 0;
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200 }
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201
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202 /* Very common errors go here */
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203 void SDL_Error(SDL_errorcode code)
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204 {
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205 switch (code) {
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206 case SDL_ENOMEM:
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207 SDL_SetError("Out of memory");
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208 break;
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209 case SDL_EFREAD:
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210 SDL_SetError("Error reading from datastream");
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211 break;
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212 case SDL_EFWRITE:
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213 SDL_SetError("Error writing to datastream");
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214 break;
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215 case SDL_EFSEEK:
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216 SDL_SetError("Error seeking in datastream");
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217 break;
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218 default:
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219 SDL_SetError("Unknown SDL error");
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220 break;
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221 }
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222 }
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223
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224 #ifdef TEST_ERROR
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225 int main(int argc, char *argv[])
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226 {
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227 char buffer[BUFSIZ+1];
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228
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229 SDL_SetError("Hi there!");
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230 printf("Error 1: %s\n", SDL_GetError());
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231 SDL_ClearError();
1336
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232 SDL_memset(buffer, '1', BUFSIZ);
0
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233 buffer[BUFSIZ] = 0;
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234 SDL_SetError("This is the error: %s (%f)", buffer, 1.0);
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235 printf("Error 2: %s\n", SDL_GetError());
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236 exit(0);
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237 }
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238 #endif