Swiftdiff options
Diffstat (limited to '3rdParty/Boost/src/boost/functional/hash/detail/hash_float.hpp')
| -rw-r--r-- | 3rdParty/Boost/src/boost/functional/hash/detail/hash_float.hpp | 61 |
1 files changed, 32 insertions, 29 deletions
diff --git a/3rdParty/Boost/src/boost/functional/hash/detail/hash_float.hpp b/3rdParty/Boost/src/boost/functional/hash/detail/hash_float.hpp index 3edc6ab..ee0ee87 100644 --- a/3rdParty/Boost/src/boost/functional/hash/detail/hash_float.hpp +++ b/3rdParty/Boost/src/boost/functional/hash/detail/hash_float.hpp @@ -6,11 +6,11 @@ #if !defined(BOOST_FUNCTIONAL_HASH_DETAIL_HASH_FLOAT_HEADER) #define BOOST_FUNCTIONAL_HASH_DETAIL_HASH_FLOAT_HEADER -#if defined(_MSC_VER) && (_MSC_VER >= 1020) -# pragma once +#include <boost/config.hpp> +#if defined(BOOST_HAS_PRAGMA_ONCE) +#pragma once #endif -#include <boost/config.hpp> #include <boost/functional/hash/detail/float_functions.hpp> #include <boost/functional/hash/detail/limits.hpp> #include <boost/utility/enable_if.hpp> @@ -73,7 +73,9 @@ namespace boost ptr += sizeof(std::size_t); while(length >= sizeof(std::size_t)) { - hash_float_combine(seed, *(std::size_t*) ptr); + std::size_t buffer = 0; + std::memcpy(&buffer, ptr, sizeof(std::size_t)); + hash_float_combine(seed, buffer); length -= sizeof(std::size_t); ptr += sizeof(std::size_t); } @@ -88,15 +90,21 @@ namespace boost return seed; } + template <typename Float, unsigned digits, unsigned max_exponent> + struct enable_binary_hash + { + BOOST_STATIC_CONSTANT(bool, value = + std::numeric_limits<Float>::is_iec559 && + std::numeric_limits<Float>::digits == digits && + std::numeric_limits<Float>::radix == 2 && + std::numeric_limits<Float>::max_exponent == max_exponent); + }; + template <typename Float> inline std::size_t float_hash_impl(Float v, BOOST_DEDUCED_TYPENAME boost::enable_if_c< - std::numeric_limits<Float>::is_iec559 && - std::numeric_limits<Float>::digits == 24 && - std::numeric_limits<Float>::radix == 2 && - std::numeric_limits<Float>::max_exponent == 128, - int>::type - ) + enable_binary_hash<Float, 24, 128>::value, + std::size_t>::type) { return hash_binary((char*) &v, 4); } @@ -105,12 +113,8 @@ namespace boost template <typename Float> inline std::size_t float_hash_impl(Float v, BOOST_DEDUCED_TYPENAME boost::enable_if_c< - std::numeric_limits<Float>::is_iec559 && - std::numeric_limits<Float>::digits == 53 && - std::numeric_limits<Float>::radix == 2 && - std::numeric_limits<Float>::max_exponent == 1024, - int>::type - ) + enable_binary_hash<Float, 53, 1024>::value, + std::size_t>::type) { return hash_binary((char*) &v, 8); } @@ -118,12 +122,8 @@ namespace boost template <typename Float> inline std::size_t float_hash_impl(Float v, BOOST_DEDUCED_TYPENAME boost::enable_if_c< - std::numeric_limits<Float>::is_iec559 && - std::numeric_limits<Float>::digits == 64 && - std::numeric_limits<Float>::radix == 2 && - std::numeric_limits<Float>::max_exponent == 16384, - int>::type - ) + enable_binary_hash<Float, 64, 16384>::value, + std::size_t>::type) { return hash_binary((char*) &v, 10); } @@ -131,12 +131,8 @@ namespace boost template <typename Float> inline std::size_t float_hash_impl(Float v, BOOST_DEDUCED_TYPENAME boost::enable_if_c< - std::numeric_limits<Float>::is_iec559 && - std::numeric_limits<Float>::digits == 113 && - std::numeric_limits<Float>::radix == 2 && - std::numeric_limits<Float>::max_exponent == 16384, - int>::type - ) + enable_binary_hash<Float, 113, 16384>::value, + std::size_t>::type) { return hash_binary((char*) &v, 16); } @@ -210,8 +206,15 @@ namespace boost template <class T> inline std::size_t float_hash_value(T v) { +#if defined(fpclassify) + switch (fpclassify(v)) +#elif BOOST_HASH_CONFORMANT_FLOATS + switch (std::fpclassify(v)) +#else using namespace std; - switch (fpclassify(v)) { + switch (fpclassify(v)) +#endif + { case FP_ZERO: return 0; case FP_INFINITE: |