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rewrite hash implementation

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This commit is contained in:
bolero-MURAKAMI 2012-11-15 11:54:57 +09:00
parent 87ee4f4032
commit d00e971abe
13 changed files with 262 additions and 269 deletions
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131
sprout/functional/hash/hash.hpp
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@ -10,36 +10,34 @@
#include <sprout/type_traits/enabler_if.hpp>
namespace sprout {
//
// hash_value
//
inline SPROUT_CONSTEXPR std::size_t hash_value(bool v);
inline SPROUT_CONSTEXPR std::size_t hash_value(char v);
inline SPROUT_CONSTEXPR std::size_t hash_value(unsigned char v);
inline SPROUT_CONSTEXPR std::size_t hash_value(signed char v);
inline SPROUT_CONSTEXPR std::size_t hash_value(char16_t v);
inline SPROUT_CONSTEXPR std::size_t hash_value(char32_t v);
inline SPROUT_CONSTEXPR std::size_t hash_value(wchar_t v);
inline SPROUT_CONSTEXPR std::size_t hash_value(short v);
inline SPROUT_CONSTEXPR std::size_t hash_value(unsigned short v);
inline SPROUT_CONSTEXPR std::size_t hash_value(int v);
inline SPROUT_CONSTEXPR std::size_t hash_value(unsigned int v);
inline SPROUT_CONSTEXPR std::size_t hash_value(long v);
inline SPROUT_CONSTEXPR std::size_t hash_value(unsigned long v);
inline SPROUT_CONSTEXPR std::size_t hash_value(long long v);
inline SPROUT_CONSTEXPR std::size_t hash_value(unsigned long long v);
//inline SPROUT_CONSTEXPR std::size_t hash_value(float v);
//inline SPROUT_CONSTEXPR std::size_t hash_value(double v);
//inline SPROUT_CONSTEXPR std::size_t hash_value(long double v);
template<
typename T,
typename sprout::enabler_if<std::is_pointer<typename std::remove_reference<T>::type>::value>::type
>
inline SPROUT_CONSTEXPR std::size_t hash_value(T&& v);
template<typename T, std::size_t N>
inline SPROUT_CONSTEXPR std::size_t hash_value(T const (&v)[N]);
namespace hash_detail {
template <typename T>
struct is_basic_number
: public std::integral_constant<
bool,
std::is_integral<T>::value
&& (sizeof(T) <= sizeof(std::size_t))
>
{};
template <typename T>
struct is_long_number
: public std::integral_constant<
bool,
std::is_integral<T>::value
&& (sizeof(T) > sizeof(std::size_t))
&& std::is_signed<T>::value
>
{};
template <typename T>
struct is_ulong_number
: public std::integral_constant<
bool,
std::is_integral<T>::value
&& (sizeof(T) > sizeof(std::size_t))
&& std::is_unsigned<T>::value
>
{};
template<typename T>
inline SPROUT_CONSTEXPR std::size_t
hash_value_signed_2(T val, int length, std::size_t seed, T positive, std::size_t i) {
@ -112,71 +110,28 @@ namespace sprout {
//
// hash_value
//
inline SPROUT_CONSTEXPR std::size_t
hash_value(bool v) {
template<typename T>
inline SPROUT_CONSTEXPR typename std::enable_if<sprout::hash_detail::is_basic_number<T>::value, std::size_t>::type
hash_value(T v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(char v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(unsigned char v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(signed char v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(char16_t v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(char32_t v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(wchar_t v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(short v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(unsigned short v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(int v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(unsigned int v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(long v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(unsigned long v) {
return static_cast<std::size_t>(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(long long v) {
template<typename T>
inline SPROUT_CONSTEXPR typename std::enable_if<sprout::hash_detail::is_long_number<T>::value, std::size_t>::type
hash_value(T v) {
return sprout::hash_detail::hash_value_signed(v);
}
inline SPROUT_CONSTEXPR std::size_t
hash_value(unsigned long long v) {
template<typename T>
inline SPROUT_CONSTEXPR typename std::enable_if<sprout::hash_detail::is_ulong_number<T>::value, std::size_t>::type
hash_value(T v) {
return sprout::hash_detail::hash_value_unsigned(v);
}
template<
typename T,
typename sprout::enabler_if<std::is_pointer<typename std::remove_reference<T>::type>::value>::type = sprout::enabler
>
inline SPROUT_CONSTEXPR std::size_t
template<typename T>
inline SPROUT_CONSTEXPR typename std::enable_if<std::is_enum<T>::value, std::size_t>::type
hash_value(T v) {
return sprout::hash_value(static_cast<typename std::underlying_type<T>::type>(v));
}
template<typename T>
inline SPROUT_CONSTEXPR typename std::enable_if<std::is_pointer<typename std::remove_reference<T>::type>::value, std::size_t>::type
hash_value(T&& v) {
return sprout::hash_detail::hash_value_pointer(v);
}