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Move the hash limits workaround into its own file.

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[SVN r53159]
This commit is contained in:
Daniel James
2009-05-21 21:21:11 +00:00
parent 6c28028f99
commit 5806a8935d
7 changed files with 61 additions and 38 deletions
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2
hash/test/hash_float_test.hpp
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@@ -14,7 +14,7 @@
#include <boost/detail/lightweight_test.hpp>
#include <cmath>
#include <boost/limits.hpp>
#include <boost/functional/hash/detail/limits.hpp>
#include <iostream>

1
hash/test/hash_function_pointer_test.cpp
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@@ -13,7 +13,6 @@
#include <boost/detail/lightweight_test.hpp>
#include <boost/limits.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/type_traits/is_base_and_derived.hpp>

2
hash/test/hash_number_test.cpp
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@@ -15,7 +15,7 @@
#include <boost/detail/lightweight_test.hpp>
#include <boost/preprocessor/cat.hpp>
#include <boost/limits.hpp>
#include <boost/functional/hash/detail/limits.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/type_traits/is_base_and_derived.hpp>

1
hash/test/hash_string_test.cpp
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@@ -13,7 +13,6 @@
#include <boost/detail/lightweight_test.hpp>
#include <boost/limits.hpp>
#include <boost/mpl/assert.hpp>
#include <boost/type_traits/is_base_and_derived.hpp>
#include <string>

35
include/boost/functional/hash/detail/hash_float.hpp
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@@ -19,9 +19,9 @@
#endif
#include <boost/functional/hash/detail/float_functions.hpp>
#include <boost/functional/hash/detail/limits.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.
@@ -50,43 +50,10 @@
#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);

57
include/boost/functional/hash/detail/limits.hpp Normal file
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@@ -0,0 +1,57 @@
// 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)
//
// On some platforms std::limits gives incorrect values for long double.
// This tries to work around them.
#if !defined(BOOST_FUNCTIONAL_HASH_DETAIL_LIMITS_HEADER)
#define BOOST_FUNCTIONAL_HASH_DETAIL_LIMITS_HEADER
#if defined(_MSC_VER) && (_MSC_VER >= 1020)
# pragma once
#endif
#include <boost/limits.hpp>
// 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__
}
}
#endif

1
include/boost/functional/hash/hash.hpp
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@@ -15,6 +15,7 @@
#include <boost/functional/hash/detail/hash_float.hpp>
#include <boost/detail/container_fwd.hpp>
#include <string>
#include <boost/limits.hpp>
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
#include <boost/type_traits/is_pointer.hpp>