annotate src/SDL_error.c @ 1:cf2af46e9e2a

Changes since SDL 1.2.0 release
author Sam Lantinga <slouken@lokigames.com>
date Thu, 26 Apr 2001 16:50:19 +0000
parents 74212992fb08
children e8157fcb3114
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, 1998, 1999, 2000, 2001 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@devolution.com
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* Simple error handling in SDL */
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29
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30 #include <stdio.h>
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31 #include <stdlib.h>
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32 #include <stdarg.h>
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33 #include <string.h>
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34
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35 #include "SDL_types.h"
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36 #include "SDL_getenv.h"
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37 #include "SDL_error.h"
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38 #include "SDL_error_c.h"
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39 #ifndef DISABLE_THREADS
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40 #include "SDL_thread_c.h"
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41 #endif
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42
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43 #ifdef DISABLE_THREADS
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44 /* The default (non-thread-safe) global error variable */
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45 static SDL_error SDL_global_error;
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46
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47 #define SDL_GetErrBuf() (&SDL_global_error)
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48 #endif /* DISABLE_THREADS */
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49
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50 #ifdef __CYGWIN__
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51 #define DISABLE_STDIO
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52 #endif
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53
0
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54 #define SDL_ERRBUFIZE 1024
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55
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56 /* Private functions */
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57
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58 static void SDL_LookupString(const Uint8 *key, Uint16 *buf, int buflen)
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59 {
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60 /* FIXME: Add code to lookup key in language string hash-table */
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61
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62 /* Key not found in language string hash-table */
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63 while ( *key && (--buflen > 0) ) {
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64 *buf++ = *key++;
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65 }
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66 *buf = 0; /* NULL terminate string */
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67 }
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68
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69 /* Public functions */
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70
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71 void SDL_SetError (const char *fmt, ...)
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72 {
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73 va_list ap;
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74 SDL_error *error;
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75
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76 /* Copy in the key, mark error as valid */
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77 error = SDL_GetErrBuf();
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78 error->error = 1;
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79 strncpy((char *)error->key, fmt, sizeof(error->key));
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80 error->key[sizeof(error->key)-1] = '\0';
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81
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82 va_start(ap, fmt);
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83 error->argc = 0;
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84 while ( *fmt ) {
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85 if ( *fmt++ == '%' ) {
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86 switch (*fmt++) {
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87 case 0: /* Malformed format string.. */
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88 --fmt;
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89 break;
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90 #if 0 /* What is a character anyway? (UNICODE issues) */
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91 case 'c':
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92 error->args[error->argc++].value_c =
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93 va_arg(ap, unsigned char);
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94 break;
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95 #endif
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96 case 'd':
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97 error->args[error->argc++].value_i =
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98 va_arg(ap, int);
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99 break;
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100 case 'f':
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101 error->args[error->argc++].value_f =
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102 va_arg(ap, double);
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103 break;
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104 case 'p':
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105 error->args[error->argc++].value_ptr =
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106 va_arg(ap, void *);
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107 break;
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108 case 's':
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109 {
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110 int index = error->argc;
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111 strncpy((char *)error->args[index].buf,
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112 va_arg(ap, char *), ERR_MAX_STRLEN);
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113 error->args[index].buf[ERR_MAX_STRLEN-1] = 0;
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114 error->argc++;
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115 }
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116 break;
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117 default:
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118 break;
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119 }
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120 if ( error->argc >= ERR_MAX_ARGS ) {
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121 break;
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122 }
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123 }
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124 }
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125 va_end(ap);
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126
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127 #ifndef DISABLE_STDIO
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128 /* If we are in debug mode, print out an error message */
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129 #ifdef DEBUG_ERROR
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130 fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError());
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131 #else
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132 if ( getenv("SDL_DEBUG") ) {
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133 fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError());
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134 }
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135 #endif
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136 #endif /* !DISABLE_STDIO */
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137 }
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138
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139 /* Print out an integer value to a UNICODE buffer */
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140 static int PrintInt(Uint16 *str, unsigned int maxlen, int value)
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141 {
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142 char tmp[128];
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143 int len, i;
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144
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145 sprintf(tmp, "%d", value);
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146 len = 0;
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147 if ( strlen(tmp) < maxlen ) {
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148 for ( i=0; tmp[i]; ++i ) {
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149 *str++ = tmp[i];
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150 ++len;
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151 }
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152 }
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153 return(len);
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154 }
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155 /* Print out a double value to a UNICODE buffer */
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156 static int PrintDouble(Uint16 *str, unsigned int maxlen, double value)
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157 {
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158 char tmp[128];
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159 int len, i;
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160
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161 sprintf(tmp, "%f", value);
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162 len = 0;
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163 if ( strlen(tmp) < maxlen ) {
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164 for ( i=0; tmp[i]; ++i ) {
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165 *str++ = tmp[i];
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166 ++len;
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167 }
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168 }
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169 return(len);
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170 }
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171 /* Print out a pointer value to a UNICODE buffer */
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172 static int PrintPointer(Uint16 *str, unsigned int maxlen, void *value)
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173 {
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parents:
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174 char tmp[128];
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diff changeset
175 int len, i;
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176
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diff changeset
177 sprintf(tmp, "%p", value);
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diff changeset
178 len = 0;
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parents:
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179 if ( strlen(tmp) < maxlen ) {
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parents:
diff changeset
180 for ( i=0; tmp[i]; ++i ) {
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diff changeset
181 *str++ = tmp[i];
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parents:
diff changeset
182 ++len;
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parents:
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183 }
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parents:
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184 }
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parents:
diff changeset
185 return(len);
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parents:
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186 }
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187
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188 /* This function has a bit more overhead than most error functions
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parents:
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189 so that it supports internationalization and thread-safe errors.
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190 */
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191 Uint16 *SDL_GetErrorMsgUNICODE(Uint16 *errstr, unsigned int maxlen)
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192 {
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193 SDL_error *error;
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194
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parents:
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195 /* Clear the error string */
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196 *errstr = 0; --maxlen;
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197
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parents:
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198 /* Get the thread-safe error, and print it out */
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199 error = SDL_GetErrBuf();
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200 if ( error->error ) {
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diff changeset
201 Uint16 translated[ERR_MAX_STRLEN], *fmt, *msg;
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202 int len;
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203 int argi;
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204
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205 /* Print out the UNICODE error message */
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206 SDL_LookupString(error->key, translated, sizeof(translated));
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207 msg = errstr;
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208 argi = 0;
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209 for ( fmt=translated; *fmt && (maxlen > 0); ) {
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210 if ( *fmt == '%' ) {
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211 switch (fmt[1]) {
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212 case 'S': /* Special SKIP operand */
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213 argi += (fmt[2] - '0');
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214 ++fmt;
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diff changeset
215 break;
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216 case '%':
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217 *msg++ = '%';
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diff changeset
218 maxlen -= 1;
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219 break;
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220 #if 0 /* What is a character anyway? (UNICODE issues) */
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221 case 'c':
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diff changeset
222 *msg++ = (unsigned char)
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diff changeset
223 error->args[argi++].value_c;
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diff changeset
224 maxlen -= 1;
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diff changeset
225 break;
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diff changeset
226 #endif
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diff changeset
227 case 'd':
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diff changeset
228 len = PrintInt(msg, maxlen,
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diff changeset
229 error->args[argi++].value_i);
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diff changeset
230 msg += len;
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parents:
diff changeset
231 maxlen -= len;
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parents:
diff changeset
232 break;
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diff changeset
233 case 'f':
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diff changeset
234 len = PrintDouble(msg, maxlen,
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parents:
diff changeset
235 error->args[argi++].value_f);
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parents:
diff changeset
236 msg += len;
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parents:
diff changeset
237 maxlen -= len;
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parents:
diff changeset
238 break;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239 case 'p':
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diff changeset
240 len = PrintPointer(msg, maxlen,
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parents:
diff changeset
241 error->args[argi++].value_ptr);
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parents:
diff changeset
242 msg += len;
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parents:
diff changeset
243 maxlen -= len;
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parents:
diff changeset
244 break;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 case 's': /* UNICODE string */
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parents:
diff changeset
246 { Uint16 buf[ERR_MAX_STRLEN], *str;
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diff changeset
247 SDL_LookupString(error->args[argi++].buf, buf, sizeof(buf));
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diff changeset
248 str = buf;
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parents:
diff changeset
249 while ( *str && (maxlen > 0) ) {
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diff changeset
250 *msg++ = *str++;
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parents:
diff changeset
251 maxlen -= 1;
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parents:
diff changeset
252 }
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parents:
diff changeset
253 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 break;
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parents:
diff changeset
255 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 fmt += 2;
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parents:
diff changeset
257 } else {
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parents:
diff changeset
258 *msg++ = *fmt++;
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parents:
diff changeset
259 maxlen -= 1;
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parents:
diff changeset
260 }
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parents:
diff changeset
261 }
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parents:
diff changeset
262 *msg = 0; /* NULL terminate the string */
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parents:
diff changeset
263 }
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264 return(errstr);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265 }
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parents:
diff changeset
266
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diff changeset
267 Uint8 *SDL_GetErrorMsg(Uint8 *errstr, unsigned int maxlen)
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parents:
diff changeset
268 {
74212992fb08 Initial revision
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parents:
diff changeset
269 Uint16 *errstr16;
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270 unsigned int i;
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parents:
diff changeset
271
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parents:
diff changeset
272 /* Allocate the UNICODE buffer */
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parents:
diff changeset
273 errstr16 = (Uint16 *)malloc(maxlen * (sizeof *errstr16));
74212992fb08 Initial revision
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parents:
diff changeset
274 if ( ! errstr16 ) {
74212992fb08 Initial revision
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parents:
diff changeset
275 strncpy((char *)errstr, "Out of memory", maxlen);
74212992fb08 Initial revision
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parents:
diff changeset
276 errstr[maxlen-1] = '\0';
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277 return(errstr);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280 /* Get the error message */
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 SDL_GetErrorMsgUNICODE(errstr16, maxlen);
74212992fb08 Initial revision
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parents:
diff changeset
282
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 /* Convert from UNICODE to Latin1 encoding */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 for ( i=0; i<maxlen; ++i ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 errstr[i] = (Uint8)errstr16[i];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 /* Free UNICODE buffer (if necessary) */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 free(errstr16);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 return(errstr);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 /* Available for backwards compatibility */
74212992fb08 Initial revision
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parents:
diff changeset
295 char *SDL_GetError (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
297 static char errmsg[SDL_ERRBUFIZE];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
299 return((char *)SDL_GetErrorMsg((unsigned char *)errmsg, SDL_ERRBUFIZE));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
300 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
301
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 void SDL_ClearError(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
303 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 SDL_error *error;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 error = SDL_GetErrBuf();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
307 error->error = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 /* Very common errors go here */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 void SDL_Error(SDL_errorcode code)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
313 switch (code) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 case SDL_ENOMEM:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315 SDL_SetError("Out of memory");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 case SDL_EFREAD:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 SDL_SetError("Error reading from datastream");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 case SDL_EFWRITE:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 SDL_SetError("Error writing to datastream");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 case SDL_EFSEEK:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 SDL_SetError("Error seeking in datastream");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326 default:
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 SDL_SetError("Unknown SDL error");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 #ifdef TEST_ERROR
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 int main(int argc, char *argv[])
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335 char buffer[BUFSIZ+1];
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 SDL_SetError("Hi there!");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
338 printf("Error 1: %s\n", SDL_GetError());
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
339 SDL_ClearError();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
340 memset(buffer, '1', BUFSIZ);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
341 buffer[BUFSIZ] = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
342 SDL_SetError("This is the error: %s (%f)", buffer, 1.0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
343 printf("Error 2: %s\n", SDL_GetError());
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
344 exit(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
345 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
346 #endif