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/*******************************************************************
*
* ttcalc.h
*
* Arithmetic Computations (specification).
*
* Copyright 1996-1999 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 TTCALC_H
#define TTCALC_H
#include "ttconfig.h"
#include "freetype.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef LONG64
typedef INT64 TT_Int64;
#define ADD_64( x, y, z ) z = x + y
#define SUB_64( x, y, z ) z = x - y
#define MUL_64( x, y, z ) z = (TT_Int64)(x) * (y)
#define DIV_64( x, y ) ( (x) / (y) )
#define SQRT_64( x ) Sqrt64( x )
#define SQRT_32( x ) Sqrt32( x )
LOCAL_DEF TT_Int32 Sqrt64( TT_Int64 l );
#else /* LONG64 */
struct TT_Int64_
{
TT_Word32 lo;
TT_Word32 hi;
};
typedef struct TT_Int64_ TT_Int64;
#define ADD_64( x, y, z ) Add64( &x, &y, &z )
#define SUB_64( x, y, z ) Sub64( &x, &y, &z )
#define MUL_64( x, y, z ) MulTo64( x, y, &z )
#define DIV_64( x, y ) Div64by32( &x, y )
#define SQRT_64( x ) Sqrt64( &x )
#define SQRT_32( x ) Sqrt32( x )
LOCAL_DEF void Add64( TT_Int64* x, TT_Int64* y, TT_Int64* z );
LOCAL_DEF void Sub64( TT_Int64* x, TT_Int64* y, TT_Int64* z );
LOCAL_DEF void MulTo64( TT_Int32 x, TT_Int32 y, TT_Int64* z );
LOCAL_DEF TT_Int32 Div64by32( TT_Int64* x, TT_Int32 y );
LOCAL_DEF int Order64( TT_Int64* z );
LOCAL_DEF TT_Int32 Sqrt64( TT_Int64* l );
#endif /* LONG64 */
/* The two following functions are now part of the API! */
/* TT_Long TT_MulDiv( TT_Long a, TT_Long b, TT_Long c ); */
/* TT_Long TT_MulFix( TT_Long a, TT_Long b ); */
#define INT_TO_F26DOT6( x ) ( (Long)(x) << 6 )
#define INT_TO_F2DOT14( x ) ( (Long)(x) << 14 )
#define INT_TO_FIXED( x ) ( (Long)(x) << 16 )
#define F2DOT14_TO_FIXED( x ) ( (Long)(x) << 2 )
#define FLOAT_TO_FIXED( x ) ( (Long)(x * 65536.0) )
#define ROUND_F26DOT6( x ) ( x >= 0 ? ( ((x) + 32) & -64) \
: ( -((32 - (x)) & -64) ) )
#ifdef __cplusplus
}
#endif
#endif /* TTCALC_H */
/* END */
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