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/* Copyright (C) 2001-2006 Artifex Software, Inc.
All Rights Reserved.
This software is provided AS-IS with no warranty, either express or
implied.
This software is distributed under license and may not be copied, modified
or distributed except as expressly authorized under the terms of that
license. Refer to licensing information at http://www.artifex.com/
or contact Artifex Software, Inc., 7 Mt. Lassen Drive - Suite A-134,
San Rafael, CA 94903, U.S.A., +1(415)492-9861, for further information.
*/
/* $Id: ttcalc.h 8022 2007-06-05 22:23:38Z giles $ */
/* Changes after FreeType: cut out the TrueType instruction interpreter. */
/*******************************************************************
*
* ttcalc.h
*
* Arithmetic Computations (specification).
*
* Copyright 1996-1998 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 "ttcommon.h"
#include "tttypes.h"
/* IntN types: */
/* */
/* Used to guarantee the size of some specific integers. */
/* */
/* Of course, they are equivalent to Short, UShort, Long, etc. */
/* but parts of this unit could be used by different programs. */
/* */
typedef signed short Int16;
typedef unsigned short Word16;
#if SIZEOF_INT == 4
typedef signed int Int32;
typedef unsigned int Word32;
#elif SIZEOF_LONG == 4
typedef signed long Int32;
typedef unsigned long Word32;
#else
#error "no 32bit type found"
#endif
#if SIZEOF_LONG == 8
/* LONG64 must be defined when a 64-bit type is available */
#define LONG64
#define INT64 long
#else
/* GCC provides the non-ANSI 'long long' 64-bit type. You can activate */
/* by defining the _GNUC_LONG64_ macro in 'ttconfig.h'. Note that this */
/* will produce many -ansi warnings during library compilation. */
#ifdef _GNUC_LONG64_
#define LONG64
#define INT64 long long
#endif /* __GNUC__ */
/* Microsoft Visual C++ also supports 64-bit integers */
#ifdef _MSC_VER
#if _MSC_VER >= 1100
#define LONG64
#define INT64 __int64
#endif
#endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
#ifdef LONG64
typedef INT64 Int64;
/* Fast muldiv */
#define FMulDiv( x, y, z ) ( (Int64)(x) * (y) / (z) )
/* Fast muldiv_round */
#define FMulDiv_Round( x, y, z ) ( ( (Int64)(x) * (y) + (z)/2 ) / (z) )
#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) = (Int64)(x) * (y) )
#define DIV_64( x, y ) ( (x) / (y) )
#define SQRT_64( x ) Sqrt64( x )
#define SQRT_32( x ) Sqrt32( x )
Int32 MulDiv( Int32 a, Int32 b, Int32 c );
Int32 MulDiv_Round( Int32 a, Int32 b, Int32 c );
Int32 Sqrt32( Int32 l );
Int32 Sqrt64( Int64 l );
#else /* LONG64 */
struct _Int64
{
Word32 lo;
Word32 hi;
};
typedef struct _Int64 Int64;
#define FMulDiv( x, y, z ) MulDiv( x, y, z )
#define FMulDiv_Round( x, y, z ) MulDiv_Round( x, y, z )
#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 )
Int32 MulDiv( Int32 a, Int32 b, Int32 c );
Int32 MulDiv_Round( Int32 a, Int32 b, Int32 c );
void Add64( Int64* x, Int64* y, Int64* z );
void Sub64( Int64* x, Int64* y, Int64* z );
void MulTo64( Int32 x, Int32 y, Int64* z );
Int32 Div64by32( Int64* x, Int32 y );
Int Order64( Int64* z );
Int Order32( Int32 z );
Int32 Sqrt32( Int32 l );
Int32 Sqrt64( Int64* l );
#endif /* LONG64 */
#define MUL_FIXED( a, b ) MulDiv_Round( (a), (b), 1 << 16 )
#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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