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Handle unsigned __int64 for MSVC6

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[SVN r14408]
This commit is contained in:
Dave Abrahams
2002-07-11 20:29:50 +00:00
parent 0ec92f1f03
commit cb5b83ef53
1 changed files with 18 additions and 0 deletions
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18
include/boost/cast.hpp
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@@ -236,6 +236,24 @@ namespace boost
template <class X, class Y> template <class X, class Y>
static inline bool check(X x, Y) static inline bool check(X x, Y)
{ return x >= 0 && static_cast<X>(static_cast<Y>(x)) != x; } { return x >= 0 && static_cast<X>(static_cast<Y>(x)) != x; }
# if defined(BOOST_MSVC) && BOOST_MSVC <= 1200
// MSVC6 can't static_cast unsigned __int64 -> floating types
# define BOOST_UINT64_CAST(src_type) \
static inline bool check(src_type x, unsigned __int64) \
{ \
if (x < 0) return false; \
unsigned __int64 y = static_cast<unsigned __int64>(x); \
bool odd = y & 0x1; \
__int64 div2 = static_cast<__int64>(y >> 1); \
return ((static_cast<src_type>(div2) * 2.0) + odd) != x; \
}
BOOST_UINT64_CAST(long double);
BOOST_UINT64_CAST(double);
BOOST_UINT64_CAST(float);
# undef BOOST_UINT64_CAST
# endif
}; };
template<> template<>