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Code Issues Releases Wiki Activity

ircd::util: Add an endian bswap; add more data()/size() participants.

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This commit is contained in:
Jason Volk 2017-12-21 14:25:50 -07:00
parent eab178b97f
commit f37311a3f1
1 changed files with 40 additions and 0 deletions
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40
include/ircd/util.h
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@ -404,6 +404,13 @@ size(const std::array<char, SIZE> &buf)
return SIZE; return SIZE;
} }
template<class T>
constexpr typename std::enable_if<std::is_pod<T>::value, size_t>::type
size(const T &val)
{
return sizeof(T);
}
template<size_t SIZE> template<size_t SIZE>
constexpr const char * constexpr const char *
@ -419,6 +426,20 @@ data(char (&buf)[SIZE])
return buf; return buf;
} }
template<class T>
constexpr typename std::enable_if<std::is_pod<T>::value, const uint8_t *>::type
data(const T &val)
{
return reinterpret_cast<const uint8_t *>(&val);
}
template<class T>
constexpr typename std::enable_if<std::is_pod<T>::value, uint8_t *>::type
data(T &val)
{
return reinterpret_cast<uint8_t *>(&val);
}
template<class T> template<class T>
auto auto
@ -1044,5 +1065,24 @@ is_powerof2(const long long v)
} }
template<class T>
T &
bswap(T *const &val)
{
assert(val != nullptr);
std::reverse(data(*val), data(*val) + size(*val));
return *val;
}
template<class T>
T
bswap(const T &val)
{
T ret;
std::reverse_copy(data(val), data(val) + size(val), data(ret));
return ret;
}
} // namespace util } // namespace util
} // namespace ircd } // namespace ircd