thirdparty/freetype-2.3.12/builds/win32/ftdebug.c

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