/***************************************************************************/
/*                                                                         */
/*  ftcalc.h                                                               */
/*                                                                         */
/*    Arithmetic computations (specification).                             */
/*                                                                         */
/*  Copyright 1996-2000 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.                                        */
/*                                                                         */
/***************************************************************************/


#ifndef FTCALC_H
#define FTCALC_H

#include "freetype.h"
#include "ftconfig.h"

#ifdef __cplusplus
extern "C" {
#endif


#ifdef LONG64


typedef INT64 FT_Int64;

#define ADD_64( x, y, z )  z = ( x ) + ( y )
#define MUL_64( x, y, z )  z = (FT_Int64)( x ) * ( y )

#define DIV_64( x, y )     ( ( x ) / ( y ) )


#ifdef FT_CONFIG_OPTION_OLD_CALCS

#define SQRT_64( z )  FT_Sqrt64( z )

FT_EXPORT_DEF( FT_Int32 )  FT_Sqrt64( FT_Int64 l );

#endif /* FT_CONFIG_OPTION_OLD_CALCS */


#else /* LONG64 */


typedef struct  FT_Int64_
{
	FT_UInt32 lo;
	FT_UInt32 hi;

} FT_Int64;


#define ADD_64( x, y, z )  FT_Add64( &x, &y, &z )
#define MUL_64( x, y, z )  FT_MulTo64( x, y, &z )
#define DIV_64( x, y )     FT_Div64by32( &x, y )


FT_EXPORT_DEF( void )  FT_Add64( FT_Int64 *  x,
								 FT_Int64 *  y,
								 FT_Int64 *  z );

FT_EXPORT_DEF( void )  FT_MulTo64( FT_Int32 x,
								   FT_Int32 y,
								   FT_Int64 *  z );

FT_EXPORT_DEF( FT_Int32 )  FT_Div64by32( FT_Int64 *  x,
										 FT_Int32 y );


#ifdef FT_CONFIG_OPTION_OLD_CALCS

#define SQRT_64( z )  FT_Sqrt64( &z )

FT_EXPORT_DEF( FT_Int32 )  FT_Sqrt64( FT_Int64 *  x );

#endif /* FT_CONFIG_OPTION_OLD_CALCS */


#endif /* LONG64 */


#ifndef FT_CONFIG_OPTION_OLD_CALCS

#define SQRT_32( x )  FT_Sqrt32( x )

BASE_DEF( FT_Int32 )  FT_Sqrt32( FT_Int32 x );

#endif /* !FT_CONFIG_OPTION_OLD_CALCS */


/*************************************************************************/
/*                                                                       */
/* FT_MulDiv() and FT_MulFix() are declared in freetype.h.               */
/*                                                                       */
/*************************************************************************/


#define INT_TO_F26DOT6( x )    ( (FT_Long)( x ) << 6  )
#define INT_TO_F2DOT14( x )    ( (FT_Long)( x ) << 14 )
#define INT_TO_FIXED( x )      ( (FT_Long)( x ) << 16 )
#define F2DOT14_TO_FIXED( x )  ( (FT_Long)( x ) << 2  )
#define FLOAT_TO_FIXED( x )    ( (FT_Long)( x * 65536.0 ) )

#define ROUND_F26DOT6( x )     ( x >= 0 ? (    ( ( x ) + 32 ) & - 64 )	   \
								 : ( -( ( 32 - ( x ) ) & - 64 ) ) )


#ifdef __cplusplus
}
#endif

#endif /* FTCALC_H */


/* END */
