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functional_hash.h (hash<long double>::operator()(long double)): Only declare.

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2007-11-20  Paolo Carlini  <pcarlini@suse.de>

	* include/tr1_impl/functional_hash.h
	(hash<long double>::operator()(long double)): Only declare.
	* src/hash.cc: Define here.
	* config/abi/pre/gnu.ver: Adjust exports.
	* include/tr1/functional: Do not include <cmath>.
	* include/std/functional: Likewise.

	* include/std/functional: Include <new>.

From-SVN: r130312
This commit is contained in:
Paolo Carlini 2007-11-20 12:34:44 +00:00 committed by Paolo Carlini
parent 7ef249e59f
commit a0ba4e53fd
6 changed files with 46 additions and 29 deletions
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11
libstdc++-v3/ChangeLog
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@ -1,3 +1,14 @@
2007-11-20 Paolo Carlini <pcarlini@suse.de>
* include/tr1_impl/functional_hash.h
(hash<long double>::operator()(long double)): Only declare.
* src/hash.cc: Define here.
* config/abi/pre/gnu.ver: Adjust exports.
* include/tr1/functional: Do not include <cmath>.
* include/std/functional: Likewise.
* include/std/functional: Include <new>.
2007-11-18 Paolo Carlini <pcarlini@suse.de>
* include/tr1/type_traits (_DEFINE_SPEC_BODY): Remove.

2
libstdc++-v3/config/abi/pre/gnu.ver
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@ -770,12 +770,14 @@ GLIBCXX_3.4.10 {
_ZNKSt3tr14hashIRKSsEclES2_;
_ZNKSt3tr14hashISbIwSt11char_traitsIwESaIwEEEclES4_;
_ZNKSt3tr14hashISsEclESs;
_ZNKSt3tr14hashIeEclEe;
_ZNKSt4hashIRKSbIwSt11char_traitsIwESaIwEEEclES5_;
_ZNKSt4hashIRKSsEclES1_;
_ZNKSt4hashISbIwSt11char_traitsIwESaIwEEEclES3_;
_ZNKSt4hashISsEclESs;
_ZNKSt4hashISt10error_codeEclES0_;
_ZNKSt4hashIeEclEe;
# for parallel mode
_ZNSt9__cxx199815_List_node_base4hook*;

2
libstdc++-v3/include/std/functional
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@ -58,8 +58,8 @@
# if defined(_GLIBCXX_INCLUDE_AS_TR1)
# error C++0x header cannot be included from TR1 header
# endif
# include <cmath>
# include <typeinfo>
# include <new>
# include <tuple>
# include <type_traits>
# include <bits/stringfwd.h>

1
libstdc++-v3/include/tr1/functional
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@ -43,7 +43,6 @@
#include <bits/c++config.h>
#include <bits/stl_function.h>
#include <cmath>
#include <typeinfo>
#include <new>
#include <tr1/tuple>

29
libstdc++-v3/include/tr1_impl/functional_hash.h
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@ -155,34 +155,9 @@ _GLIBCXX_BEGIN_NAMESPACE_TR1
return __result;
};
// For long double, careful with random padding bits (e.g., on x86,
// 10 bytes -> 12 bytes) and resort to frexp.
template<>
inline size_t
hash<long double>::operator()(long double __val) const
{
size_t __result = 0;
int __exponent;
__val = std::frexp(__val, &__exponent);
__val = __val < 0.0l ? -(__val + 0.5l) : __val;
const long double __mult =
__gnu_cxx::__numeric_traits<size_t>::__max + 1.0l;
__val *= __mult;
// Try to use all the bits of the mantissa (really necessary only
// on 32-bit targets, at least for 80-bit floating point formats).
const size_t __hibits = (size_t)__val;
__val = (__val - (long double)__hibits) * __mult;
const size_t __coeff =
__gnu_cxx::__numeric_traits<size_t>::__max / __LDBL_MAX_EXP__;
__result = __hibits + (size_t)__val + __coeff * __exponent;
return __result;
};
size_t
hash<long double>::operator()(long double __val) const;
// Explicit specialization of member operator for types that are not builtin.
template<>

30
libstdc++-v3/src/hash.cc
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@ -29,6 +29,7 @@
#include <cstddef>
#include <string>
#include <cmath>
#ifdef __GXX_EXPERIMENTAL_CXX0X__
#include <functional>
@ -45,6 +46,35 @@ namespace std
{
_GLIBCXX_BEGIN_NAMESPACE_TR1
// For long double, careful with random padding bits (e.g., on x86,
// 10 bytes -> 12 bytes) and resort to frexp.
template<>
size_t
hash<long double>::operator()(long double __val) const
{
size_t __result = 0;
int __exponent;
__val = std::frexp(__val, &__exponent);
__val = __val < 0.0l ? -(__val + 0.5l) : __val;
const long double __mult =
__gnu_cxx::__numeric_traits<size_t>::__max + 1.0l;
__val *= __mult;
// Try to use all the bits of the mantissa (really necessary only
// on 32-bit targets, at least for 80-bit floating point formats).
const size_t __hibits = (size_t)__val;
__val = (__val - (long double)__hibits) * __mult;
const size_t __coeff =
__gnu_cxx::__numeric_traits<size_t>::__max / __LDBL_MAX_EXP__;
__result = __hibits + (size_t)__val + __coeff * __exponent;
return __result;
};
template<>
size_t
hash<string>::operator()(string __s) const