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00001 /*
00002   largeint.h
00003 
00004   Header for 64 bit integer arithmetics library
00005 
00006  */
00007 #ifndef _LARGEINT_H
00008 #define _LARGEINT_H
00009 
00010 #include <windows.h>
00011 
00012 #ifdef __cplusplus
00013 extern "C" {
00014 #endif
00015 
00016 #ifdef _HAVE_INT64
00017 #define _toi (__int64)
00018 #define _toui (unsigned __int64)
00019 #else
00020 #error "64 bit integers not supported"
00021 #endif
00022 
00023 /*
00024   We don't let the compiler see the prototypes if we are compiling the
00025   library because if it does it will choke on conflicting types in the
00026   prototypes.
00027 */
00028 
00029 #if defined(LARGEINT_PROTOS) || defined(__COMPILING_LARGEINT)
00030 
00031 #ifndef __COMPILING_LARGEINT
00032 /* addition/subtraction */
00033 LARGE_INTEGER WINAPI LargeIntegerAdd (LARGE_INTEGER, LARGE_INTEGER);
00034 LARGE_INTEGER WINAPI LargeIntegerSubtract (LARGE_INTEGER, LARGE_INTEGER);
00035 
00036 /* bit operations */
00037 LARGE_INTEGER WINAPI LargeIntegerArithmeticShift (LARGE_INTEGER, int);
00038 LARGE_INTEGER WINAPI LargeIntegerShiftLeft (LARGE_INTEGER, int);
00039 LARGE_INTEGER WINAPI LargeIntegerShiftRight (LARGE_INTEGER, int);
00040 LARGE_INTEGER WINAPI LargeIntegerNegate (LARGE_INTEGER);
00041 
00042 /* conversion */
00043 LARGE_INTEGER WINAPI ConvertLongToLargeInteger (LONG);
00044 LARGE_INTEGER WINAPI ConvertUlongToLargeInteger (ULONG);
00045 
00046 /* multiplication */
00047 LARGE_INTEGER WINAPI EnlargedIntegerMultiply (LONG, LONG);
00048 LARGE_INTEGER WINAPI EnlargedUnsignedMultiply (ULONG, ULONG);
00049 LARGE_INTEGER WINAPI ExtendedIntegerMultiply (LARGE_INTEGER, LONG);
00050 /* FIXME: is this not part of largeint? */
00051 LARGE_INTEGER WINAPI LargeIntegerMultiply (LARGE_INTEGER, LARGE_INTEGER);
00052 #endif /* __COMPILING_LARGEINT */
00053 
00054 #else
00055 
00056 #define LargeIntegerAdd(a,b) (LARGE_INTEGER)(_toi(a) + _toi(b))
00057 #define LargeIntegerSubtract(a,b) (LARGE_INTEGER)(_toi(a) - _toi(b))
00058 #define LargeIntegerRightShift(i,n) (LARGE_INTEGER)(_toi(i) >> (n))
00059 #define LargeIntegerArithmeticShift LargeIntegerRightShift
00060 #define LargeIntegerLeftShift(i,n) (LARGE_INTEGER)(_toi(i) << (n))
00061 #define LargeIntegerNegate(i) (LARGE_INTEGER)(- _toi(i))
00062 #define EnlargedIntegerMultiply(a,b) (LARGE_INTEGER)(_toi(a) * _toi(b))
00063 #define EnlargedUnsignedMultiply(a,b) (LARGE_INTEGER)(_toui(a) * _toui(b))
00064 #define ExtendedIntegerMultiply(a,b) (LARGE_INTEGER)(_toi(a) * _toi(b))
00065 /* FIXME: should this exist */
00066 #define LargeIntegerMultiply(a,b) (LARGE_INTEGER)(_toi(a) * _toi(b))
00067 #define ConvertLongToLargeInteger(l) (LARGE_INTEGER)(_toi(l))
00068 #define ConvertUlongToLargeInteger(ul) (LARGE_INTEGER)(_toui(ul))
00069 
00070 #endif /* LARGEINT_PROTOS || __COMPILING_LARGEINT */
00071 
00072 #ifndef __COMPILING_LARGEINT
00073 /* division; no macros of these because of multiple expansion */
00074 LARGE_INTEGER WINAPI LargeIntegerDivide (LARGE_INTEGER, LARGE_INTEGER, PLARGE_INTEGER);
00075 ULONG WINAPI EnlargedUnsignedDivide (ULARGE_INTEGER, ULONG, PULONG);
00076 LARGE_INTEGER WINAPI ExtendedLargeIntegerDivide (LARGE_INTEGER, ULONG, PULONG);
00077 LARGE_INTEGER WINAPI ExtendedMagicDivide (LARGE_INTEGER, LARGE_INTEGER, int);
00078 #endif /* __COMPILING_LARGEINT */
00079 
00080 #define LargeIntegerAnd(dest, src, m) \
00081 { \
00082   dest._STRUCT_NAME(u.)LowPart = s._STRUCT_NAME(u.)LowPart & m._STRUCT_NAME(u.)LowPart; \
00083   dest._STRUCT_NAME(u.)HighPart = s._STRUCT_NAME(u.)HighPart & m._STRUCT_NAME(u.)HighPart; \
00084 }
00085 
00086 /* comparision */
00087 #define LargeIntegerGreaterThan(a,b) (_toi(a) > _toi(b))
00088 #define LargeIntegerGreaterThanOrEqual(a,b) (_toi(a) >= _toi(b))
00089 #define LargeIntegerEqualTo(a,b) (_toi(a) == _toi(b))
00090 #define LargeIntegerNotEqualTo(a,b) (_toi(a) != _toi(b))
00091 #define LargeIntegerLessThan(a,b) (_toi(a) < _toi(b))
00092 #define LargeIntegerLessThanOrEqualTo(a,b) (_toi(a) <= _toi(b))
00093 #define LargeIntegerGreaterThanZero(a) (_toi(a) > 0)
00094 #define LargeIntegerGreaterOrEqualToZero(a) ((a)._STRUCT_NAME(u.)HighPart > 0)
00095 #define LargeIntegerEqualToZero(a) !((a)._STRUCT_NAME(u.)LowPart | (a)._STRUCT_NAME(u.)HighPart)
00096 #define LargeIntegerNotEqualToZero(a) ((a)._STRUCT_NAME(u.)LowPart | (a)._STRUCT_NAME(u.)HighPart)
00097 #define LargeIntegerLessThanZero(a) ((a)._STRUCT_NAME(u.)HighPart < 0)
00098 #define LargeIntegerLessOrEqualToZero(a) (_toi(a) <= 0)
00099 
00100 #ifndef __COMPILING_LARGEINT
00101 #undef _toi
00102 #undef _toui
00103 #endif
00104 
00105 #ifdef __cplusplus
00106 }
00107 #endif
00108 
00109 #endif /* _LARGEINT_H */
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