include/largeint.h

   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
  13 extern "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 */
  33 LARGE_INTEGER WINAPI LargeIntegerAdd (LARGE_INTEGER, LARGE_INTEGER);
  34 LARGE_INTEGER WINAPI LargeIntegerSubtract (LARGE_INTEGER, LARGE_INTEGER);
  35
  36 /* bit operations */
  37 LARGE_INTEGER WINAPI LargeIntegerArithmeticShift (LARGE_INTEGER, int);
  38 LARGE_INTEGER WINAPI LargeIntegerShiftLeft (LARGE_INTEGER, int);
  39 LARGE_INTEGER WINAPI LargeIntegerShiftRight (LARGE_INTEGER, int);
  40 LARGE_INTEGER WINAPI LargeIntegerNegate (LARGE_INTEGER);
  41
  42 /* conversion */
  43 LARGE_INTEGER WINAPI ConvertLongToLargeInteger (LONG);
  44 LARGE_INTEGER WINAPI ConvertUlongToLargeInteger (ULONG);
  45
  46 /* multiplication */
  47 LARGE_INTEGER WINAPI EnlargedIntegerMultiply (LONG, LONG);
  48 LARGE_INTEGER WINAPI EnlargedUnsignedMultiply (ULONG, ULONG);
  49 LARGE_INTEGER WINAPI ExtendedIntegerMultiply (LARGE_INTEGER, LONG);
  50 /* FIXME: is this not part of largeint? */
  51 LARGE_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 */
  74 LARGE_INTEGER WINAPI LargeIntegerDivide (LARGE_INTEGER, LARGE_INTEGER, PLARGE_INTEGER);
  75 ULONG WINAPI EnlargedUnsignedDivide (ULARGE_INTEGER, ULONG, PULONG);
  76 LARGE_INTEGER WINAPI ExtendedLargeIntegerDivide (LARGE_INTEGER, ULONG, PULONG);
  77 LARGE_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 */