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1 /***************************************************************************/ |
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2 /* */ |
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3 /* ftdebug.c */ |
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4 /* */ |
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5 /* Debugging and logging component for Win32 (body). */ |
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6 /* */ |
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7 /* Copyright 1996-2001, 2002, 2005, 2008, 2009 by */ |
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8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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9 /* */ |
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10 /* This file is part of the FreeType project, and may only be used, */ |
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11 /* modified, and distributed under the terms of the FreeType project */ |
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12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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13 /* this file you indicate that you have read the license and */ |
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14 /* understand and accept it fully. */ |
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15 /* */ |
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16 /***************************************************************************/ |
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17 |
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18 |
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19 /*************************************************************************/ |
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20 /* */ |
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21 /* This component contains various macros and functions used to ease the */ |
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22 /* debugging of the FreeType engine. Its main purpose is in assertion */ |
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23 /* checking, tracing, and error detection. */ |
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24 /* */ |
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25 /* There are now three debugging modes: */ |
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26 /* */ |
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27 /* - trace mode */ |
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28 /* */ |
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29 /* Error and trace messages are sent to the log file (which can be the */ |
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30 /* standard error output). */ |
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31 /* */ |
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32 /* - error mode */ |
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33 /* */ |
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34 /* Only error messages are generated. */ |
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35 /* */ |
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36 /* - release mode: */ |
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37 /* */ |
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38 /* No error message is sent or generated. The code is free from any */ |
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39 /* debugging parts. */ |
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40 /* */ |
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41 /*************************************************************************/ |
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42 |
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43 |
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44 #include <ft2build.h> |
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45 #include FT_INTERNAL_DEBUG_H |
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46 |
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47 |
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48 #ifdef FT_DEBUG_LEVEL_ERROR |
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49 |
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50 |
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51 #include <stdarg.h> |
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52 #include <stdlib.h> |
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53 #include <string.h> |
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54 |
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55 #include <windows.h> |
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56 |
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57 |
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58 FT_BASE_DEF( void ) |
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59 FT_Message( const char* fmt, ... ) |
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60 { |
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61 static char buf[8192]; |
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62 va_list ap; |
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63 |
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64 |
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65 va_start( ap, fmt ); |
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66 vprintf( fmt, ap ); |
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67 /* send the string to the debugger as well */ |
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68 vsprintf( buf, fmt, ap ); |
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69 OutputDebugStringA( buf ); |
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70 va_end( ap ); |
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71 } |
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72 |
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73 |
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74 FT_BASE_DEF( void ) |
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75 FT_Panic( const char* fmt, ... ) |
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76 { |
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77 static char buf[8192]; |
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78 va_list ap; |
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79 |
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80 |
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81 va_start( ap, fmt ); |
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82 vsprintf( buf, fmt, ap ); |
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83 OutputDebugStringA( buf ); |
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84 va_end( ap ); |
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85 |
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86 exit( EXIT_FAILURE ); |
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87 } |
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88 |
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89 |
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90 #ifdef FT_DEBUG_LEVEL_TRACE |
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91 |
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92 |
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93 /* array of trace levels, initialized to 0 */ |
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94 int ft_trace_levels[trace_count]; |
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95 |
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96 /* define array of trace toggle names */ |
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97 #define FT_TRACE_DEF( x ) #x , |
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98 |
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99 static const char* ft_trace_toggles[trace_count + 1] = |
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100 { |
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101 #include FT_INTERNAL_TRACE_H |
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102 NULL |
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103 }; |
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104 |
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105 #undef FT_TRACE_DEF |
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106 |
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107 |
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108 /*************************************************************************/ |
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109 /* */ |
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110 /* Initialize the tracing sub-system. This is done by retrieving the */ |
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111 /* value of the "FT2_DEBUG" environment variable. It must be a list of */ |
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112 /* toggles, separated by spaces, `;' or `,'. Example: */ |
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113 /* */ |
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114 /* "any:3 memory:6 stream:5" */ |
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115 /* */ |
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116 /* This will request that all levels be set to 3, except the trace level */ |
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117 /* for the memory and stream components which are set to 6 and 5, */ |
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118 /* respectively. */ |
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119 /* */ |
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120 /* See the file <freetype/internal/fttrace.h> for details of the */ |
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121 /* available toggle names. */ |
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122 /* */ |
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123 /* The level must be between 0 and 6; 0 means quiet (except for serious */ |
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124 /* runtime errors), and 6 means _very_ verbose. */ |
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125 /* */ |
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126 FT_BASE_DEF( void ) |
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127 ft_debug_init( void ) |
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128 { |
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129 const char* ft2_debug = getenv( "FT2_DEBUG" ); |
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130 |
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131 |
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132 if ( ft2_debug ) |
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133 { |
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134 const char* p = ft2_debug; |
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135 const char* q; |
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136 |
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137 |
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138 for ( ; *p; p++ ) |
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139 { |
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140 /* skip leading whitespace and separators */ |
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141 if ( *p == ' ' || *p == '\t' || *p == ',' || *p == ';' || *p == '=' ) |
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142 continue; |
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143 |
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144 /* read toggle name, followed by ':' */ |
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145 q = p; |
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146 while ( *p && *p != ':' ) |
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147 p++; |
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148 |
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149 if ( *p == ':' && p > q ) |
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150 { |
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151 int n, i, len = p - q; |
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152 int level = -1, found = -1; |
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153 |
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154 |
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155 for ( n = 0; n < trace_count; n++ ) |
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156 { |
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157 const char* toggle = ft_trace_toggles[n]; |
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158 |
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159 |
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160 for ( i = 0; i < len; i++ ) |
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161 { |
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162 if ( toggle[i] != q[i] ) |
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163 break; |
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164 } |
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165 |
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166 if ( i == len && toggle[i] == 0 ) |
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167 { |
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168 found = n; |
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169 break; |
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170 } |
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171 } |
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172 |
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173 /* read level */ |
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174 p++; |
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175 if ( *p ) |
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176 { |
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177 level = *p++ - '0'; |
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178 if ( level < 0 || level > 7 ) |
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179 level = -1; |
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180 } |
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181 |
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182 if ( found >= 0 && level >= 0 ) |
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183 { |
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184 if ( found == trace_any ) |
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185 { |
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186 /* special case for "any" */ |
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187 for ( n = 0; n < trace_count; n++ ) |
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188 ft_trace_levels[n] = level; |
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189 } |
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190 else |
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191 ft_trace_levels[found] = level; |
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192 } |
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193 } |
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194 } |
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195 } |
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196 } |
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197 |
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198 |
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199 #else /* !FT_DEBUG_LEVEL_TRACE */ |
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200 |
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201 |
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202 FT_BASE_DEF( void ) |
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203 ft_debug_init( void ) |
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204 { |
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205 /* nothing */ |
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206 } |
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207 |
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208 |
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209 #endif /* !FT_DEBUG_LEVEL_TRACE */ |
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210 |
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211 #endif /* FT_DEBUG_LEVEL_ERROR */ |
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212 |
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213 |
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214 /* END */ |