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Deal with NaN & infinity in the hash float function on Broland.

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[SVN r28186]
This commit is contained in:
Daniel James
2005-04-12 20:23:09 +00:00
parent a2cec1b71c
commit b1def5cf1d
1 changed files with 9 additions and 0 deletions
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9
include/boost/functional/hash/hash.hpp
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@@ -220,6 +220,15 @@ namespace boost
template <class T> template <class T>
inline std::size_t float_hash_value(T v) inline std::size_t float_hash_value(T v)
{ {
#if defined(__BORLAND__)
if(v == std::numeric_limits<double>::quiet_NaN())
return 0;
if(v == std::numeric_limits<double>::infinity())
return 1;
if(v == -std::numeric_limits<double>::infinity())
return 2;
#endif
int exp; int exp;
v = boost::hash_detail::call_frexp(v, &exp); v = boost::hash_detail::call_frexp(v, &exp);