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/***************************************************************************/ /* */ /* ftdebug.h */ /* */ /* Debugging and logging component (specification). */ /* */ /* Copyright 1996-2001, 2002, 2004 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. */ /* */ /* */ /* IMPORTANT: A description of FreeType's debugging support can be */ /* found in "docs/DEBUG.TXT". Read it if you need to use or */ /* understand this code. */ /* */ /***************************************************************************/ #ifndef __FTDEBUG_H__ #define __FTDEBUG_H__ #include <ft2build.h> #include FT_CONFIG_CONFIG_H #include FT_FREETYPE_H FT_BEGIN_HEADER /* force the definition of FT_DEBUG_LEVEL_ERROR if FT_DEBUG_LEVEL_TRACE */ /* is already defined; this simplifies the following #ifdefs */ /* */ #ifdef FT_DEBUG_LEVEL_TRACE #undef FT_DEBUG_LEVEL_ERROR #define FT_DEBUG_LEVEL_ERROR #endif /*************************************************************************/ /* */ /* Define the trace enums as well as the trace levels array when they */ /* are needed. */ /* */ /*************************************************************************/ #ifdef FT_DEBUG_LEVEL_TRACE #define FT_TRACE_DEF( x ) trace_ ## x , /* defining the enumeration */ typedef enum { #include FT_INTERNAL_TRACE_H trace_count } FT_Trace; /* defining the array of trace levels, provided by `src/base/ftdebug.c' */ extern int ft_trace_levels[trace_count]; #undef FT_TRACE_DEF #endif /* FT_DEBUG_LEVEL_TRACE */ /*************************************************************************/ /* */ /* Define the FT_TRACE macro */ /* */ /* IMPORTANT! */ /* */ /* Each component must define the macro FT_COMPONENT to a valid FT_Trace */ /* value before using any TRACE macro. */ /* */ /*************************************************************************/ #ifdef FT_DEBUG_LEVEL_TRACE #define FT_TRACE( level, varformat ) \ do \ { \ if ( ft_trace_levels[FT_COMPONENT] >= level ) \ FT_Message varformat; \ } while ( 0 ) #else /* !FT_DEBUG_LEVEL_TRACE */ #define FT_TRACE( level, varformat ) do ; while ( 0 ) /* nothing */ #endif /* !FT_DEBUG_LEVEL_TRACE */ /*************************************************************************/ /* */ /* <Function> */ /* FT_Trace_Get_Count */ /* */ /* <Description> */ /* Return the number of available trace components. */ /* */ /* <Return> */ /* The number of trace components. 0 if FreeType 2 is not built with */ /* FT_DEBUG_LEVEL_TRACE definition. */ /* */ /* <Note> */ /* This function may be useful if you want to access elements of */ /* the internal `ft_trace_levels' array by an index. */ /* */ FT_EXPORT( FT_Int ) FT_Trace_Get_Count( void ); /*************************************************************************/ /* */ /* <Function> */ /* FT_Trace_Get_Name */ /* */ /* <Description> */ /* Return the name of a trace component. */ /* */ /* <Input> */ /* The index of the trace component. */ /* */ /* <Return> */ /* The name of the trace component. This is a statically allocated */ /* C string, so do not free it after use. NULL if FreeType 2 is not */ /* built with FT_DEBUG_LEVEL_TRACE definition. */ /* */ /* <Note> */ /* Use @FT_Trace_Get_Count to get the number of available trace */ /* components. */ /* */ /* This function may be useful if you want to control FreeType 2's */ /* debug level in your appliaciton. */ /* */ FT_EXPORT( const char * ) FT_Trace_Get_Name( FT_Int idx ); /*************************************************************************/ /* */ /* You need two opening resp. closing parentheses! */ /* */ /* Example: FT_TRACE0(( "Value is %i", foo )) */ /* */ /*************************************************************************/ #define FT_TRACE0( varformat ) FT_TRACE( 0, varformat ) #define FT_TRACE1( varformat ) FT_TRACE( 1, varformat ) #define FT_TRACE2( varformat ) FT_TRACE( 2, varformat ) #define FT_TRACE3( varformat ) FT_TRACE( 3, varformat ) #define FT_TRACE4( varformat ) FT_TRACE( 4, varformat ) #define FT_TRACE5( varformat ) FT_TRACE( 5, varformat ) #define FT_TRACE6( varformat ) FT_TRACE( 6, varformat ) #define FT_TRACE7( varformat ) FT_TRACE( 7, varformat ) /*************************************************************************/ /* */ /* Define the FT_ERROR macro */ /* */ /*************************************************************************/ #ifdef FT_DEBUG_LEVEL_ERROR #define FT_ERROR( varformat ) FT_Message varformat #else /* !FT_DEBUG_LEVEL_ERROR */ #define FT_ERROR( varformat ) do ; while ( 0 ) /* nothing */ #endif /* !FT_DEBUG_LEVEL_ERROR */ /*************************************************************************/ /* */ /* Define the FT_ASSERT macro */ /* */ /*************************************************************************/ #ifdef FT_DEBUG_LEVEL_ERROR #define FT_ASSERT( condition ) \ do \ { \ if ( !( condition ) ) \ FT_Panic( "assertion failed on line %d of file %s\n", \ __LINE__, __FILE__ ); \ } while ( 0 ) #else /* !FT_DEBUG_LEVEL_ERROR */ #define FT_ASSERT( condition ) do ; while ( 0 ) #endif /* !FT_DEBUG_LEVEL_ERROR */ /*************************************************************************/ /* */ /* Define 'FT_Message' and 'FT_Panic' when needed */ /* */ /*************************************************************************/ #ifdef FT_DEBUG_LEVEL_ERROR #include "stdio.h" /* for vprintf() */ /* print a message */ FT_EXPORT( void ) FT_Message( const char* fmt, ... ); /* print a message and exit */ FT_EXPORT( void ) FT_Panic( const char* fmt, ... ); #endif /* FT_DEBUG_LEVEL_ERROR */ FT_BASE( void ) ft_debug_init( void ); #if defined( _MSC_VER ) /* Visual C++ (and Intel C++) */ /* we disable the warning `conditional expression is constant' here */ /* in order to compile cleanly with the maximum level of warnings */ #pragma warning( disable : 4127 ) #endif /* _MSC_VER */ FT_END_HEADER #endif /* __FTDEBUG_H__ */ /* END */