summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat (limited to '3rdParty/Boost/boost/functional/hash/detail/hash_float.hpp')
m---------3rdParty/Boost0
-rw-r--r--3rdParty/Boost/boost/functional/hash/detail/hash_float.hpp197
2 files changed, 0 insertions, 197 deletions
diff --git a/3rdParty/Boost b/3rdParty/Boost
new file mode 160000
+Subproject 3bbdbc8cf1996f23d9a366da8bac0f97be6ad79
diff --git a/3rdParty/Boost/boost/functional/hash/detail/hash_float.hpp b/3rdParty/Boost/boost/functional/hash/detail/hash_float.hpp
deleted file mode 100644
index 5d5ac34..0000000
--- a/3rdParty/Boost/boost/functional/hash/detail/hash_float.hpp
+++ /dev/null
@@ -1,197 +0,0 @@
-
-// Copyright 2005-2009 Daniel James.
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-
-#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
-#endif
-
-#if defined(BOOST_MSVC)
-#pragma warning(push)
-#if BOOST_MSVC >= 1400
-#pragma warning(disable:6294) // Ill-defined for-loop: initial condition does
- // not satisfy test. Loop body not executed
-#endif
-#endif
-
-#include <boost/functional/hash/detail/float_functions.hpp>
-#include <boost/integer/static_log2.hpp>
-#include <boost/cstdint.hpp>
-#include <boost/limits.hpp>
-#include <boost/assert.hpp>
-
-// Select implementation for the current platform.
-
-// Cygwn
-#if defined(__CYGWIN__)
-# if defined(__i386__) || defined(_M_IX86)
-# define BOOST_HASH_USE_x86_BINARY_HASH
-# endif
-
-// STLport
-#elif defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)
-// fpclassify aren't good enough on STLport.
-
-// GNU libstdc++ 3
-#elif defined(__GLIBCPP__) || defined(__GLIBCXX__)
-# if (defined(__USE_ISOC99) || defined(_GLIBCXX_USE_C99_MATH)) && \
- !(defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__))
-# define BOOST_HASH_USE_FPCLASSIFY
-# endif
-
-// Dinkumware Library, on Visual C++
-#elif (defined(_YVALS) && !defined(__IBMCPP__)) || defined(_CPPLIB_VER)
-
-// Not using _fpclass because it is only available for double.
-
-#endif
-
-// On OpenBSD, numeric_limits is not reliable for long doubles, but
-// the macros defined in <float.h> are.
-
-#if defined(__OpenBSD__)
-#include <float.h>
-#endif
-
-namespace boost
-{
- namespace hash_detail
- {
- template <class T>
- struct limits : std::numeric_limits<T> {};
-
-#if defined(__OpenBSD__)
- template <>
- struct limits<long double>
- : std::numeric_limits<long double>
- {
- static long double epsilon() {
- return LDBL_EPSILON;
- }
-
- static long double (max)() {
- return LDBL_MAX;
- }
-
- static long double (min)() {
- return LDBL_MIN;
- }
-
- BOOST_STATIC_CONSTANT(int, digits = LDBL_MANT_DIG);
- BOOST_STATIC_CONSTANT(int, max_exponent = LDBL_MAX_EXP);
- BOOST_STATIC_CONSTANT(int, min_exponent = LDBL_MIN_EXP);
- };
-#endif // __OpenBSD__
-
- inline void hash_float_combine(std::size_t& seed, std::size_t value)
- {
- seed ^= value + (seed<<6) + (seed>>2);
- }
-
-// A simple, non-portable hash algorithm for x86.
-#if defined(BOOST_HASH_USE_x86_BINARY_HASH)
- inline std::size_t float_hash_impl(float v)
- {
- boost::uint32_t* ptr = (boost::uint32_t*)&v;
- std::size_t seed = *ptr;
- return seed;
- }
-
- inline std::size_t float_hash_impl(double v)
- {
- boost::uint32_t* ptr = (boost::uint32_t*)&v;
- std::size_t seed = *ptr++;
- hash_float_combine(seed, *ptr);
- return seed;
- }
-
- inline std::size_t float_hash_impl(long double v)
- {
- boost::uint32_t* ptr = (boost::uint32_t*)&v;
- std::size_t seed = *ptr++;
- hash_float_combine(seed, *ptr++);
- hash_float_combine(seed, *(boost::uint16_t*)ptr);
- return seed;
- }
-
-#else
-
- template <class T>
- inline std::size_t float_hash_impl(T v)
- {
- int exp = 0;
-
- v = boost::hash_detail::call_frexp(v, &exp);
-
- // A postive value is easier to hash, so combine the
- // sign with the exponent.
- if(v < 0) {
- v = -v;
- exp += limits<T>::max_exponent -
- limits<T>::min_exponent;
- }
-
- // The result of frexp is always between 0.5 and 1, so its
- // top bit will always be 1. Subtract by 0.5 to remove that.
- v -= T(0.5);
- v = boost::hash_detail::call_ldexp(v,
- limits<std::size_t>::digits + 1);
- std::size_t seed = static_cast<std::size_t>(v);
- v -= seed;
-
- // ceiling(digits(T) * log2(radix(T))/ digits(size_t)) - 1;
- std::size_t const length
- = (limits<T>::digits *
- boost::static_log2<limits<T>::radix>::value - 1)
- / limits<std::size_t>::digits;
-
- for(std::size_t i = 0; i != length; ++i)
- {
- v = boost::hash_detail::call_ldexp(v,
- limits<std::size_t>::digits);
- std::size_t part = static_cast<std::size_t>(v);
- v -= part;
- hash_float_combine(seed, part);
- }
-
- hash_float_combine(seed, exp);
-
- return seed;
- }
-#endif
-
- template <class T>
- inline std::size_t float_hash_value(T v)
- {
-#if defined(BOOST_HASH_USE_FPCLASSIFY)
- using namespace std;
- switch (fpclassify(v)) {
- case FP_ZERO:
- return 0;
- case FP_INFINITE:
- return (std::size_t)(v > 0 ? -1 : -2);
- case FP_NAN:
- return (std::size_t)(-3);
- case FP_NORMAL:
- case FP_SUBNORMAL:
- return float_hash_impl(v);
- default:
- BOOST_ASSERT(0);
- return 0;
- }
-#else
- return v == 0 ? 0 : float_hash_impl(v);
-#endif
- }
- }
-}
-
-#if defined(BOOST_MSVC)
-#pragma warning(pop)
-#endif
-
-#endif