author | Sam Lantinga <slouken@libsdl.org> |
Wed, 01 Feb 2006 06:32:25 +0000 | |
changeset 1312 | c9b51268668f |
parent 1172 | f69f4d25fb20 |
child 1330 | 450721ad5436 |
permissions | -rw-r--r-- |
0 | 1 |
/* |
2 |
SDL - Simple DirectMedia Layer |
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1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1172
diff
changeset
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3 |
Copyright (C) 1997-2006 Sam Lantinga |
0 | 4 |
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5 |
This library is free software; you can redistribute it and/or |
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1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1172
diff
changeset
|
6 |
modify it under the terms of the GNU Lesser General Public |
0 | 7 |
License as published by the Free Software Foundation; either |
1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1172
diff
changeset
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8 |
version 2.1 of the License, or (at your option) any later version. |
0 | 9 |
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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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1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1172
diff
changeset
|
13 |
Lesser General Public License for more details. |
0 | 14 |
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1312
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1172
diff
changeset
|
15 |
You should have received a copy of the GNU Lesser General Public |
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1172
diff
changeset
|
16 |
License along with this library; if not, write to the Free Software |
c9b51268668f
Updated copyright information and removed rcs id lines (problematic in branch merges)
Sam Lantinga <slouken@libsdl.org>
parents:
1172
diff
changeset
|
17 |
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
0 | 18 |
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Sam Lantinga |
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Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
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slouken@libsdl.org |
0 | 21 |
*/ |
22 |
||
23 |
/* Simple error handling in SDL */ |
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24 |
||
25 |
#include <stdio.h> |
|
26 |
#include <stdlib.h> |
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27 |
#include <stdarg.h> |
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28 |
#include <string.h> |
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29 |
||
30 |
#include "SDL_types.h" |
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31 |
#include "SDL_getenv.h" |
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32 |
#include "SDL_error.h" |
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33 |
#include "SDL_error_c.h" |
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34 |
#ifndef DISABLE_THREADS |
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35 |
#include "SDL_thread_c.h" |
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36 |
#endif |
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37 |
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38 |
#ifdef DISABLE_THREADS |
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39 |
/* The default (non-thread-safe) global error variable */ |
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40 |
static SDL_error SDL_global_error; |
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41 |
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42 |
#define SDL_GetErrBuf() (&SDL_global_error) |
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#endif /* DISABLE_THREADS */ |
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cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
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diff
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45 |
#ifdef __CYGWIN__ |
cf2af46e9e2a
Changes since SDL 1.2.0 release
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parents:
0
diff
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|
46 |
#define DISABLE_STDIO |
cf2af46e9e2a
Changes since SDL 1.2.0 release
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|
47 |
#endif |
cf2af46e9e2a
Changes since SDL 1.2.0 release
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48 |
|
0 | 49 |
#define SDL_ERRBUFIZE 1024 |
50 |
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51 |
/* Private functions */ |
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52 |
||
53 |
static void SDL_LookupString(const Uint8 *key, Uint16 *buf, int buflen) |
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54 |
{ |
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55 |
/* FIXME: Add code to lookup key in language string hash-table */ |
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56 |
||
57 |
/* Key not found in language string hash-table */ |
|
58 |
while ( *key && (--buflen > 0) ) { |
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59 |
*buf++ = *key++; |
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60 |
} |
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61 |
*buf = 0; /* NULL terminate string */ |
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62 |
} |
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63 |
||
64 |
/* Public functions */ |
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65 |
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66 |
void SDL_SetError (const char *fmt, ...) |
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67 |
{ |
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68 |
va_list ap; |
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69 |
SDL_error *error; |
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70 |
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71 |
/* Copy in the key, mark error as valid */ |
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72 |
error = SDL_GetErrBuf(); |
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73 |
error->error = 1; |
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74 |
strncpy((char *)error->key, fmt, sizeof(error->key)); |
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75 |
error->key[sizeof(error->key)-1] = '\0'; |
|
76 |
||
77 |
va_start(ap, fmt); |
|
78 |
error->argc = 0; |
|
79 |
while ( *fmt ) { |
|
80 |
if ( *fmt++ == '%' ) { |
|
81 |
switch (*fmt++) { |
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82 |
case 0: /* Malformed format string.. */ |
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83 |
--fmt; |
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84 |
break; |
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85 |
#if 0 /* What is a character anyway? (UNICODE issues) */ |
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86 |
case 'c': |
|
87 |
error->args[error->argc++].value_c = |
|
88 |
va_arg(ap, unsigned char); |
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89 |
break; |
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90 |
#endif |
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91 |
case 'd': |
|
92 |
error->args[error->argc++].value_i = |
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93 |
va_arg(ap, int); |
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94 |
break; |
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95 |
case 'f': |
|
96 |
error->args[error->argc++].value_f = |
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97 |
va_arg(ap, double); |
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98 |
break; |
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99 |
case 'p': |
|
100 |
error->args[error->argc++].value_ptr = |
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101 |
va_arg(ap, void *); |
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102 |
break; |
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103 |
case 's': |
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104 |
{ |
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105 |
int index = error->argc; |
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1172
f69f4d25fb20
Don't crash if a NULL is passed for a "%s" parameter to SDL_SetError(),
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
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106 |
char *str = va_arg(ap, char *); |
f69f4d25fb20
Don't crash if a NULL is passed for a "%s" parameter to SDL_SetError(),
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
107 |
if (str == NULL) |
f69f4d25fb20
Don't crash if a NULL is passed for a "%s" parameter to SDL_SetError(),
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
108 |
str = "(null)"; |
f69f4d25fb20
Don't crash if a NULL is passed for a "%s" parameter to SDL_SetError(),
Ryan C. Gordon <icculus@icculus.org>
parents:
769
diff
changeset
|
109 |
strncpy((char *)error->args[index].buf, str, ERR_MAX_STRLEN); |
0 | 110 |
error->args[index].buf[ERR_MAX_STRLEN-1] = 0; |
111 |
error->argc++; |
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112 |
} |
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113 |
break; |
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default: |
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115 |
break; |
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116 |
} |
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117 |
if ( error->argc >= ERR_MAX_ARGS ) { |
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118 |
break; |
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119 |
} |
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120 |
} |
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121 |
} |
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va_end(ap); |
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||
1
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
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124 |
#ifndef DISABLE_STDIO |
0 | 125 |
/* If we are in debug mode, print out an error message */ |
126 |
#ifdef DEBUG_ERROR |
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127 |
fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError()); |
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128 |
#else |
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129 |
if ( getenv("SDL_DEBUG") ) { |
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130 |
fprintf(stderr, "SDL_SetError: %s\n", SDL_GetError()); |
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131 |
} |
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#endif |
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1
cf2af46e9e2a
Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents:
0
diff
changeset
|
133 |
#endif /* !DISABLE_STDIO */ |
0 | 134 |
} |
135 |
||
136 |
/* Print out an integer value to a UNICODE buffer */ |
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137 |
static int PrintInt(Uint16 *str, unsigned int maxlen, int value) |
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138 |
{ |
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139 |
char tmp[128]; |
|
140 |
int len, i; |
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141 |
||
142 |
sprintf(tmp, "%d", value); |
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143 |
len = 0; |
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144 |
if ( strlen(tmp) < maxlen ) { |
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145 |
for ( i=0; tmp[i]; ++i ) { |
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146 |
*str++ = tmp[i]; |
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147 |
++len; |
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148 |
} |
|
149 |
} |
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150 |
return(len); |
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151 |
} |
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152 |
/* Print out a double value to a UNICODE buffer */ |
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153 |
static int PrintDouble(Uint16 *str, unsigned int maxlen, double value) |
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154 |
{ |
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155 |
char tmp[128]; |
|
156 |
int len, i; |
|
157 |
||
158 |
sprintf(tmp, "%f", value); |
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159 |
len = 0; |
|
160 |
if ( strlen(tmp) < maxlen ) { |
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161 |
for ( i=0; tmp[i]; ++i ) { |
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162 |
*str++ = tmp[i]; |
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163 |
++len; |
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164 |
} |
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165 |
} |
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166 |
return(len); |
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167 |
} |
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168 |
/* Print out a pointer value to a UNICODE buffer */ |
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169 |
static int PrintPointer(Uint16 *str, unsigned int maxlen, void *value) |
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170 |
{ |
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171 |
char tmp[128]; |
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172 |
int len, i; |
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173 |
||
174 |
sprintf(tmp, "%p", value); |
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175 |
len = 0; |
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176 |
if ( strlen(tmp) < maxlen ) { |
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177 |
for ( i=0; tmp[i]; ++i ) { |
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178 |
*str++ = tmp[i]; |
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179 |
++len; |
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180 |
} |
|
181 |
} |
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182 |
return(len); |
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183 |
} |
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184 |
||
185 |
/* This function has a bit more overhead than most error functions |
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186 |
so that it supports internationalization and thread-safe errors. |
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187 |
*/ |
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188 |
Uint16 *SDL_GetErrorMsgUNICODE(Uint16 *errstr, unsigned int maxlen) |
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189 |
{ |
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190 |
SDL_error *error; |
|
191 |
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192 |
/* Clear the error string */ |
|
193 |
*errstr = 0; --maxlen; |
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194 |
||
195 |
/* Get the thread-safe error, and print it out */ |
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196 |
error = SDL_GetErrBuf(); |
|
197 |
if ( error->error ) { |
|
198 |
Uint16 translated[ERR_MAX_STRLEN], *fmt, *msg; |
|
199 |
int len; |
|
200 |
int argi; |
|
201 |
||
202 |
/* Print out the UNICODE error message */ |
|
203 |
SDL_LookupString(error->key, translated, sizeof(translated)); |
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204 |
msg = errstr; |
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205 |
argi = 0; |
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206 |
for ( fmt=translated; *fmt && (maxlen > 0); ) { |
|
207 |
if ( *fmt == '%' ) { |
|
208 |
switch (fmt[1]) { |
|
209 |
case 'S': /* Special SKIP operand */ |
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210 |
argi += (fmt[2] - '0'); |
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211 |
++fmt; |
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212 |
break; |
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213 |
case '%': |
|
214 |
*msg++ = '%'; |
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215 |
maxlen -= 1; |
|
216 |
break; |
|
217 |
#if 0 /* What is a character anyway? (UNICODE issues) */ |
|
218 |
case 'c': |
|
219 |
*msg++ = (unsigned char) |
|
220 |
error->args[argi++].value_c; |
|
221 |
maxlen -= 1; |
|
222 |
break; |
|
223 |
#endif |
|
224 |
case 'd': |
|
225 |
len = PrintInt(msg, maxlen, |
|
226 |
error->args[argi++].value_i); |
|
227 |
msg += len; |
|
228 |
maxlen -= len; |
|
229 |
break; |
|
230 |
case 'f': |
|
231 |
len = PrintDouble(msg, maxlen, |
|
232 |
error->args[argi++].value_f); |
|
233 |
msg += len; |
|
234 |
maxlen -= len; |
|
235 |
break; |
|
236 |
case 'p': |
|
237 |
len = PrintPointer(msg, maxlen, |
|
238 |
error->args[argi++].value_ptr); |
|
239 |
msg += len; |
|
240 |
maxlen -= len; |
|
241 |
break; |
|
242 |
case 's': /* UNICODE string */ |
|
243 |
{ Uint16 buf[ERR_MAX_STRLEN], *str; |
|
244 |
SDL_LookupString(error->args[argi++].buf, buf, sizeof(buf)); |
|
245 |
str = buf; |
|
246 |
while ( *str && (maxlen > 0) ) { |
|
247 |
*msg++ = *str++; |
|
248 |
maxlen -= 1; |
|
249 |
} |
|
250 |
} |
|
251 |
break; |
|
252 |
} |
|
253 |
fmt += 2; |
|
254 |
} else { |
|
255 |
*msg++ = *fmt++; |
|
256 |
maxlen -= 1; |
|
257 |
} |
|
258 |
} |
|
259 |
*msg = 0; /* NULL terminate the string */ |
|
260 |
} |
|
261 |
return(errstr); |
|
262 |
} |
|
263 |
||
264 |
Uint8 *SDL_GetErrorMsg(Uint8 *errstr, unsigned int maxlen) |
|
265 |
{ |
|
266 |
Uint16 *errstr16; |
|
267 |
unsigned int i; |
|
268 |
||
269 |
/* Allocate the UNICODE buffer */ |
|
270 |
errstr16 = (Uint16 *)malloc(maxlen * (sizeof *errstr16)); |
|
271 |
if ( ! errstr16 ) { |
|
272 |
strncpy((char *)errstr, "Out of memory", maxlen); |
|
273 |
errstr[maxlen-1] = '\0'; |
|
274 |
return(errstr); |
|
275 |
} |
|
276 |
||
277 |
/* Get the error message */ |
|
278 |
SDL_GetErrorMsgUNICODE(errstr16, maxlen); |
|
279 |
||
280 |
/* Convert from UNICODE to Latin1 encoding */ |
|
281 |
for ( i=0; i<maxlen; ++i ) { |
|
282 |
errstr[i] = (Uint8)errstr16[i]; |
|
283 |
} |
|
284 |
||
285 |
/* Free UNICODE buffer (if necessary) */ |
|
286 |
free(errstr16); |
|
287 |
||
288 |
return(errstr); |
|
289 |
} |
|
290 |
||
291 |
/* Available for backwards compatibility */ |
|
292 |
char *SDL_GetError (void) |
|
293 |
{ |
|
294 |
static char errmsg[SDL_ERRBUFIZE]; |
|
295 |
||
296 |
return((char *)SDL_GetErrorMsg((unsigned char *)errmsg, SDL_ERRBUFIZE)); |
|
297 |
} |
|
298 |
||
299 |
void SDL_ClearError(void) |
|
300 |
{ |
|
301 |
SDL_error *error; |
|
302 |
||
303 |
error = SDL_GetErrBuf(); |
|
304 |
error->error = 0; |
|
305 |
} |
|
306 |
||
307 |
/* Very common errors go here */ |
|
308 |
void SDL_Error(SDL_errorcode code) |
|
309 |
{ |
|
310 |
switch (code) { |
|
311 |
case SDL_ENOMEM: |
|
312 |
SDL_SetError("Out of memory"); |
|
313 |
break; |
|
314 |
case SDL_EFREAD: |
|
315 |
SDL_SetError("Error reading from datastream"); |
|
316 |
break; |
|
317 |
case SDL_EFWRITE: |
|
318 |
SDL_SetError("Error writing to datastream"); |
|
319 |
break; |
|
320 |
case SDL_EFSEEK: |
|
321 |
SDL_SetError("Error seeking in datastream"); |
|
322 |
break; |
|
323 |
default: |
|
324 |
SDL_SetError("Unknown SDL error"); |
|
325 |
break; |
|
326 |
} |
|
327 |
} |
|
328 |
||
329 |
#ifdef TEST_ERROR |
|
330 |
int main(int argc, char *argv[]) |
|
331 |
{ |
|
332 |
char buffer[BUFSIZ+1]; |
|
333 |
||
334 |
SDL_SetError("Hi there!"); |
|
335 |
printf("Error 1: %s\n", SDL_GetError()); |
|
336 |
SDL_ClearError(); |
|
337 |
memset(buffer, '1', BUFSIZ); |
|
338 |
buffer[BUFSIZ] = 0; |
|
339 |
SDL_SetError("This is the error: %s (%f)", buffer, 1.0); |
|
340 |
printf("Error 2: %s\n", SDL_GetError()); |
|
341 |
exit(0); |
|
342 |
} |
|
343 |
#endif |