huwcampbell.com
Reactos
1/*
2 largeint.h
3
4 Header for 64 bit integer arithmetics library
5
6 */
7#ifndef _LARGEINT_H
8#define _LARGEINT_H
9
10#include <windows.h>
11
12#ifdef __cplusplus
13extern "C" {
14#endif
15
16#ifdef _HAVE_INT64
17#define _toi (__int64)
18#define _toui (unsigned __int64)
19#else
20#error "64 bit integers not supported"
21#endif
22
23/*
24 We don't let the compiler see the prototypes if we are compiling the
25 library because if it does it will choke on conflicting types in the
26 prototypes.
27*/
28
29#if defined(LARGEINT_PROTOS) || defined(__COMPILING_LARGEINT)
30
31#ifndef __COMPILING_LARGEINT
32/* addition/subtraction */
33LARGE_INTEGER WINAPI LargeIntegerAdd (LARGE_INTEGER, LARGE_INTEGER);
34LARGE_INTEGER WINAPI LargeIntegerSubtract (LARGE_INTEGER, LARGE_INTEGER);
35
36/* bit operations */
37LARGE_INTEGER WINAPI LargeIntegerArithmeticShift (LARGE_INTEGER, int);
38LARGE_INTEGER WINAPI LargeIntegerShiftLeft (LARGE_INTEGER, int);
39LARGE_INTEGER WINAPI LargeIntegerShiftRight (LARGE_INTEGER, int);
40LARGE_INTEGER WINAPI LargeIntegerNegate (LARGE_INTEGER);
41
42/* conversion */
43LARGE_INTEGER WINAPI ConvertLongToLargeInteger (LONG);
44LARGE_INTEGER WINAPI ConvertUlongToLargeInteger (ULONG);
45
46/* multiplication */
47LARGE_INTEGER WINAPI EnlargedIntegerMultiply (LONG, LONG);
48LARGE_INTEGER WINAPI EnlargedUnsignedMultiply (ULONG, ULONG);
49LARGE_INTEGER WINAPI ExtendedIntegerMultiply (LARGE_INTEGER, LONG);
50/* FIXME: is this not part of largeint? */
51LARGE_INTEGER WINAPI LargeIntegerMultiply (LARGE_INTEGER, LARGE_INTEGER);
52#endif /* __COMPILING_LARGEINT */
53
54#else
55
56#define LargeIntegerAdd(a,b) (LARGE_INTEGER)(_toi(a) + _toi(b))
57#define LargeIntegerSubtract(a,b) (LARGE_INTEGER)(_toi(a) - _toi(b))
58#define LargeIntegerRightShift(i,n) (LARGE_INTEGER)(_toi(i) >> (n))
59#define LargeIntegerArithmeticShift LargeIntegerRightShift
60#define LargeIntegerLeftShift(i,n) (LARGE_INTEGER)(_toi(i) << (n))
61#define LargeIntegerNegate(i) (LARGE_INTEGER)(- _toi(i))
62#define EnlargedIntegerMultiply(a,b) (LARGE_INTEGER)(_toi(a) * _toi(b))
63#define EnlargedUnsignedMultiply(a,b) (LARGE_INTEGER)(_toui(a) * _toui(b))
64#define ExtendedIntegerMultiply(a,b) (LARGE_INTEGER)(_toi(a) * _toi(b))
65/* FIXME: should this exist */
66#define LargeIntegerMultiply(a,b) (LARGE_INTEGER)(_toi(a) * _toi(b))
67#define ConvertLongToLargeInteger(l) (LARGE_INTEGER)(_toi(l))
68#define ConvertUlongToLargeInteger(ul) (LARGE_INTEGER)(_toui(ul))
69
70#endif /* LARGEINT_PROTOS || __COMPILING_LARGEINT */
71
72#ifndef __COMPILING_LARGEINT
73/* division; no macros of these because of multiple expansion */
74LARGE_INTEGER WINAPI LargeIntegerDivide (LARGE_INTEGER, LARGE_INTEGER, PLARGE_INTEGER);
75ULONG WINAPI EnlargedUnsignedDivide (ULARGE_INTEGER, ULONG, PULONG);
76LARGE_INTEGER WINAPI ExtendedLargeIntegerDivide (LARGE_INTEGER, ULONG, PULONG);
77LARGE_INTEGER WINAPI ExtendedMagicDivide (LARGE_INTEGER, LARGE_INTEGER, int);
78#endif /* __COMPILING_LARGEINT */
79
80#define LargeIntegerAnd(dest, src, m) \
81{ \
82 dest._STRUCT_NAME(u.)LowPart = s._STRUCT_NAME(u.)LowPart & m._STRUCT_NAME(u.)LowPart; \
83 dest._STRUCT_NAME(u.)HighPart = s._STRUCT_NAME(u.)HighPart & m._STRUCT_NAME(u.)HighPart; \
84}
85
86/* comparision */
87#define LargeIntegerGreaterThan(a,b) (_toi(a) > _toi(b))
88#define LargeIntegerGreaterThanOrEqual(a,b) (_toi(a) >= _toi(b))
89#define LargeIntegerEqualTo(a,b) (_toi(a) == _toi(b))
90#define LargeIntegerNotEqualTo(a,b) (_toi(a) != _toi(b))
91#define LargeIntegerLessThan(a,b) (_toi(a) < _toi(b))
92#define LargeIntegerLessThanOrEqualTo(a,b) (_toi(a) <= _toi(b))
93#define LargeIntegerGreaterThanZero(a) (_toi(a) > 0)
94#define LargeIntegerGreaterOrEqualToZero(a) ((a)._STRUCT_NAME(u.)HighPart > 0)
95#define LargeIntegerEqualToZero(a) !((a)._STRUCT_NAME(u.)LowPart | (a)._STRUCT_NAME(u.)HighPart)
96#define LargeIntegerNotEqualToZero(a) ((a)._STRUCT_NAME(u.)LowPart | (a)._STRUCT_NAME(u.)HighPart)
97#define LargeIntegerLessThanZero(a) ((a)._STRUCT_NAME(u.)HighPart < 0)
98#define LargeIntegerLessOrEqualToZero(a) (_toi(a) <= 0)
99
100#ifndef __COMPILING_LARGEINT
101#undef _toi
102#undef _toui
103#endif
104
105#ifdef __cplusplus
106}
107#endif
108
109#endif /* _LARGEINT_H */