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ftdebug.c (7493B)

---

/****************************************************************************
*
* ftdebug.c
*
*   Debugging and logging component for WinCE (body).
*
* Copyright (C) 1996-2025 by
* David Turner, Robert Wilhelm, and Werner Lemberg.
*
* This file is part of the FreeType project, and may only be used,
* modified, and distributed under the terms of the FreeType project
* license, LICENSE.TXT.  By continuing to use, modify, or distribute
* this file you indicate that you have read the license and
* understand and accept it fully.
*
*/


 /**************************************************************************
  *
  * This component contains various macros and functions used to ease the
  * debugging of the FreeType engine.  Its main purpose is in assertion
  * checking, tracing, and error detection.
  *
  * There are now three debugging modes:
  *
  * - trace mode
  *
  *   Error and trace messages are sent to the log file (which can be the
  *   standard error output).
  *
  * - error mode
  *
  *   Only error messages are generated.
  *
  * - release mode:
  *
  *   No error message is sent or generated.  The code is free from any
  *   debugging parts.
  *
  */


#include <freetype/freetype.h>
#include <freetype/internal/ftdebug.h>


#ifdef FT_DEBUG_LEVEL_ERROR

#include <stdarg.h>
#include <stdlib.h>
#include <string.h>

#include <windows.h>


 static void
 OutputDebugStringEx( const char*  str )
 {
   static WCHAR  buf[8192];

   int  sz = MultiByteToWideChar( CP_ACP, 0, str, -1, buf,
                                  sizeof ( buf ) / sizeof ( *buf ) );


   if ( !sz )
     lstrcpyW( buf, L"OutputDebugStringEx: MultiByteToWideChar failed" );

   OutputDebugStringW( buf );
 }


 /* documentation is in ftdebug.h */

 FT_BASE_DEF( void )
 FT_Message( const char*  fmt,
             ... )
 {
   static char  buf[8192];
   va_list      ap;


   va_start( ap, fmt );
   vfprintf( stderr, fmt, ap );
   /* send the string to the debugger as well */
   vsprintf( buf, fmt, ap );
   OutputDebugStringEx( buf );
   va_end( ap );
 }


 /* documentation is in ftdebug.h */

 FT_BASE_DEF( void )
 FT_Panic( const char*  fmt,
           ... )
 {
   static char  buf[8192];
   va_list      ap;


   va_start( ap, fmt );
   vsprintf( buf, fmt, ap );
   OutputDebugStringEx( buf );
   va_end( ap );

   exit( EXIT_FAILURE );
 }


 /* documentation is in ftdebug.h */

 FT_BASE_DEF( int )
 FT_Throw( FT_Error     error,
           int          line,
           const char*  file )
 {
#if 0
   /* activating the code in this block makes FreeType very chatty */
   fprintf( stderr,
            "%s:%d: error 0x%02x: %s\n",
            file,
            line,
            error,
            FT_Error_String( error ) );
#else
   FT_UNUSED( error );
   FT_UNUSED( line );
   FT_UNUSED( file );
#endif

   return 0;
 }

#endif /* FT_DEBUG_LEVEL_ERROR */


#ifdef FT_DEBUG_LEVEL_TRACE

 /* array of trace levels, initialized to 0; */
 /* this gets adjusted at run-time           */
 static int  ft_trace_levels_enabled[trace_count];

 /* array of trace levels, always initialized to 0 */
 static int  ft_trace_levels_disabled[trace_count];

 /* a pointer to either `ft_trace_levels_enabled' */
 /* or `ft_trace_levels_disabled'                 */
 int*  ft_trace_levels;

 /* define array of trace toggle names */
#define FT_TRACE_DEF( x )  #x ,

 static const char*  ft_trace_toggles[trace_count + 1] =
 {
#include <freetype/internal/fttrace.h>
   NULL
 };

#undef FT_TRACE_DEF


 /* documentation is in ftdebug.h */

 FT_BASE_DEF( FT_Int )
 FT_Trace_Get_Count( void )
 {
   return trace_count;
 }


 /* documentation is in ftdebug.h */

 FT_BASE_DEF( const char * )
 FT_Trace_Get_Name( FT_Int  idx )
 {
   int  max = FT_Trace_Get_Count();


   if ( idx < max )
     return ft_trace_toggles[idx];
   else
     return NULL;
 }


 /* documentation is in ftdebug.h */

 FT_BASE_DEF( void )
 FT_Trace_Disable( void )
 {
   ft_trace_levels = ft_trace_levels_disabled;
 }


 /* documentation is in ftdebug.h */

 FT_BASE_DEF( void )
 FT_Trace_Enable( void )
 {
   ft_trace_levels = ft_trace_levels_enabled;
 }


 /**************************************************************************
  *
  * Initialize the tracing sub-system.  This is done by retrieving the
  * value of the `FT2_DEBUG' environment variable.  It must be a list of
  * toggles, separated by spaces, `;', or `,'.  Example:
  *
  *   export FT2_DEBUG="any:3 memory:7 stream:5"
  *
  * This requests that all levels be set to 3, except the trace level for
  * the memory and stream components which are set to 7 and 5,
  * respectively.
  *
  * See the file `include/freetype/internal/fttrace.h' for details of
  * the available toggle names.
  *
  * The level must be between 0 and 7; 0 means quiet (except for serious
  * runtime errors), and 7 means _very_ verbose.
  */
 FT_BASE_DEF( void )
 ft_debug_init( void )
 {
   /* Windows Mobile doesn't have environment API:           */
   /* GetEnvironmentStrings, GetEnvironmentVariable, getenv. */
   /*                                                        */
   /* FIXME!!! How to set debug mode?                        */

   /* const char*  ft2_debug = getenv( "FT2_DEBUG" ); */

   const char*  ft2_debug = NULL;


   if ( ft2_debug )
   {
     const char*  p = ft2_debug;
     const char*  q;


     for ( ; *p; p++ )
     {
       /* skip leading whitespace and separators */
       if ( *p == ' ' || *p == '\t' || *p == ',' || *p == ';' || *p == '=' )
         continue;

       /* read toggle name, followed by ':' */
       q = p;
       while ( *p && *p != ':' )
         p++;

       if ( !*p )
         break;

       if ( *p == ':' && p > q )
       {
         FT_Int  n, i, len = (FT_Int)( p - q );
         FT_Int  level = -1, found = -1;


         for ( n = 0; n < trace_count; n++ )
         {
           const char*  toggle = ft_trace_toggles[n];


           for ( i = 0; i < len; i++ )
           {
             if ( toggle[i] != q[i] )
               break;
           }

           if ( i == len && toggle[i] == 0 )
           {
             found = n;
             break;
           }
         }

         /* read level */
         p++;
         if ( *p )
         {
           level = *p - '0';
           if ( level < 0 || level > 7 )
             level = -1;
         }

         if ( found >= 0 && level >= 0 )
         {
           if ( found == trace_any )
           {
             /* special case for `any' */
             for ( n = 0; n < trace_count; n++ )
               ft_trace_levels_enabled[n] = level;
           }
           else
             ft_trace_levels_enabled[found] = level;
         }
       }
     }
   }

   ft_trace_levels = ft_trace_levels_enabled;
 }


#else  /* !FT_DEBUG_LEVEL_TRACE */


 FT_BASE_DEF( void )
 ft_debug_init( void )
 {
   /* nothing */
 }


 FT_BASE_DEF( FT_Int )
 FT_Trace_Get_Count( void )
 {
   return 0;
 }


 FT_BASE_DEF( const char * )
 FT_Trace_Get_Name( FT_Int  idx )
 {
   FT_UNUSED( idx );

   return NULL;
 }


 FT_BASE_DEF( void )
 FT_Trace_Disable( void )
 {
   /* nothing */
 }


 /* documentation is in ftdebug.h */

 FT_BASE_DEF( void )
 FT_Trace_Enable( void )
 {
   /* nothing */
 }


#endif /* !FT_DEBUG_LEVEL_TRACE */


/* END */