/*

  largeint.h

  Header for 64 bit integer arithmetics library

 */

#ifndef _LARGEINT_H

#define _LARGEINT_H

#if __GNUC__ >=3

#pragma GCC system_header

#endif

#include <windows.h>

#ifdef __cplusplus

extern "C" {

#endif

#ifdef _HAVE_INT64

#define _toi (__int64)

#define _toui (unsigned __int64)

#else

#error "64 bit integers not supported"

#endif

/*

  We don't let the compiler see the prototypes if we are compiling the

  library because if it does it will choke on conflicting types in the

  prototypes.

*/

#if defined(LARGEINT_PROTOS) || defined(__COMPILING_LARGEINT)

#ifndef __COMPILING_LARGEINT

/* addition/subtraction */

LARGE_INTEGER WINAPI LargeIntegerAdd (LARGE_INTEGER, LARGE_INTEGER);

LARGE_INTEGER WINAPI LargeIntegerSubtract (LARGE_INTEGER, LARGE_INTEGER);

/* bit operations */

LARGE_INTEGER WINAPI LargeIntegerArithmeticShift (LARGE_INTEGER, int);

LARGE_INTEGER WINAPI LargeIntegerShiftLeft (LARGE_INTEGER, int);

LARGE_INTEGER WINAPI LargeIntegerShiftRight (LARGE_INTEGER, int);

LARGE_INTEGER WINAPI LargeIntegerNegate (LARGE_INTEGER);

/* conversion */

LARGE_INTEGER WINAPI ConvertLongToLargeInteger (LONG);

LARGE_INTEGER WINAPI ConvertUlongToLargeInteger (ULONG);

/* multiplication */

LARGE_INTEGER WINAPI EnlargedIntegerMultiply (LONG, LONG);

LARGE_INTEGER WINAPI EnlargedUnsignedMultiply (ULONG, ULONG);

LARGE_INTEGER WINAPI ExtendedIntegerMultiply (LARGE_INTEGER, LONG);

/* FIXME: is this not part of largeint? */

LARGE_INTEGER WINAPI LargeIntegerMultiply (LARGE_INTEGER, LARGE_INTEGER);

#endif /* __COMPILING_LARGEINT */

#else

#define LargeIntegerAdd(a,b) (LARGE_INTEGER)(_toi(a) + _toi(b))

#define LargeIntegerSubtract(a,b) (LARGE_INTEGER)(_toi(a) - _toi(b))

#define LargeIntegerRightShift(i,n) (LARGE_INTEGER)(_toi(i) >> (n))

#define LargeIntegerArithmeticShift LargeIntegerRightShift

#define LargeIntegerLeftShift(i,n) (LARGE_INTEGER)(_toi(i) << (n))

#define LargeIntegerNegate(i) (LARGE_INTEGER)(- _toi(i))

#define EnlargedIntegerMultiply(a,b) (LARGE_INTEGER)(_toi(a) * _toi(b))

#define EnlargedUnsignedMultiply(a,b) (LARGE_INTEGER)(_toui(a) * _toui(b))

#define ExtendedIntegerMultiply(a,b) (LARGE_INTEGER)(_toi(a) * _toi(b))

/* FIXME: should this exist */

#define LargeIntegerMultiply(a,b) (LARGE_INTEGER)(_toi(a) * _toi(b))

#define ConvertLongToLargeInteger(l) (LARGE_INTEGER)(_toi(l))

#define ConvertUlongToLargeInteger(ul) (LARGE_INTEGER)(_toui(ul))

#endif /* LARGEINT_PROTOS || __COMPILING_LARGEINT */

#ifndef __COMPILING_LARGEINT

/* division; no macros of these because of multiple expansion */

LARGE_INTEGER WINAPI LargeIntegerDivide (LARGE_INTEGER, LARGE_INTEGER, PLARGE_INTEGER);

ULONG WINAPI EnlargedUnsignedDivide (ULARGE_INTEGER, ULONG, PULONG);

LARGE_INTEGER WINAPI ExtendedLargeIntegerDivide (LARGE_INTEGER, ULONG, PULONG);

LARGE_INTEGER WINAPI ExtendedMagicDivide (LARGE_INTEGER, LARGE_INTEGER, int);

#endif /* __COMPILING_LARGEINT */

#define LargeIntegerAnd(dest, src, m) \

{ \

  dest._STRUCT_NAME(u.)LowPart = s._STRUCT_NAME(u.)LowPart & m._STRUCT_NAME(u.)LowPart; \

  dest._STRUCT_NAME(u.)HighPart = s._STRUCT_NAME(u.)HighPart & m._STRUCT_NAME(u.)HighPart; \

}

/* comparision */

#define LargeIntegerGreaterThan(a,b) (_toi(a) > _toi(b))

#define LargeIntegerGreaterThanOrEqual(a,b) (_toi(a) >= _toi(b))

#define LargeIntegerEqualTo(a,b) (_toi(a) == _toi(b))

#define LargeIntegerNotEqualTo(a,b) (_toi(a) != _toi(b))

#define LargeIntegerLessThan(a,b) (_toi(a) < _toi(b))

#define LargeIntegerLessThanOrEqualTo(a,b) (_toi(a) <= _toi(b))

#define LargeIntegerGreaterThanZero(a) (_toi(a) > 0)

#define LargeIntegerGreaterOrEqualToZero(a) ((a)._STRUCT_NAME(u.)HighPart > 0)

#define LargeIntegerEqualToZero(a) !((a)._STRUCT_NAME(u.)LowPart | (a)._STRUCT_NAME(u.)HighPart)

#define LargeIntegerNotEqualToZero(a) ((a)._STRUCT_NAME(u.)LowPart | (a)._STRUCT_NAME(u.)HighPart)

#define LargeIntegerLessThanZero(a) ((a)._STRUCT_NAME(u.)HighPart < 0)

#define LargeIntegerLessOrEqualToZero(a) (_toi(a) <= 0)

#ifndef __COMPILING_LARGEINT

#undef _toi

#undef _toui

#endif

#ifdef __cplusplus

}

#endif

#endif /* _LARGEINT_H */