feedc0de/boost_endian
1
0 Fork 0
forked from boostorg/endian
Code Pull Requests Activity

Enable double, fix bug in generic reverse_bytes implementation. Begin refactoring converter_test code.

Browse Source
This commit is contained in:
Beman committed 2013-05-11 16:08:15 -04:00
1 parent 9e96faf4c1
commit c349e35e91
2 files changed
+154 -27
Download Patch File Download Diff File Expand all files Collapse all files

No files matched your search

include/boost/endian/converters.hpp
+17 -16
View File
@@ -38,28 +38,28 @@ namespace endian
// reverse_bytes overloads for floating point types as requested by Vicente
// Botet and others.
// TODO: Track progress of Floating-Point Typedefs Having Specified Widths proposal (N3626)
// TODO: Track progress of Floating-Point Typedefs Having Specified Widths proposal (N3626)
inline float reverse_bytes(float x) BOOST_NOEXCEPT;
//inline double reverse_bytes(double x) BOOST_NOEXCEPT;
inline double reverse_bytes(double x) BOOST_NOEXCEPT;
// general reverse_bytes function template to meet requests for UDT support by Vicente
// Botet and others.
template <class T>
inline T reverse_bytes(T x) BOOST_NOEXCEPT; // convert little to big or visa versa
// reverse bytes if native endian order is not big
// reverse bytes unless native endianness is big
template <class T>
inline T big(T x) BOOST_NOEXCEPT;
inline T big(T x) BOOST_NOEXCEPT; // alternate names: reverse_bytes_unless_big, reverse_unless_big
// Return: x if native endian order is big, otherwise reverse_bytes(x)
// reverse bytes if native endian order is not little
// reverse bytes unless native endianness is little
template <class T>
inline T little(T x) BOOST_NOEXCEPT;
inline T little(T x) BOOST_NOEXCEPT; // alternate names: reverse_bytes_unless_little, reverse_unless_little
// Return: x if native endian order is little, otherwise reverse_bytes(x);
// compile-time generic byte order conversion
template <BOOST_SCOPED_ENUM(order) From, BOOST_SCOPED_ENUM(order) To, class T>
/*inline*/ T convert_bytes(T from) BOOST_NOEXCEPT;
T convert_bytes(T from) BOOST_NOEXCEPT;
// runtime actual byte-order determination
inline BOOST_SCOPED_ENUM(order) actual_order(BOOST_SCOPED_ENUM(order) o) BOOST_NOEXCEPT;
@@ -159,22 +159,23 @@ namespace endian
return *(const float*)&tmp;
}
//inline double reverse_bytes(double x) BOOST_NOEXCEPT
//{
// BOOST_STATIC_ASSERT_MSG(sizeof(double) == sizeof(uint64_t),
// "boost::endian only supprts sizeof(double) == 8; please report error to boost mailing list");
//}
inline double reverse_bytes(double x) BOOST_NOEXCEPT
{
BOOST_STATIC_ASSERT_MSG(sizeof(double) == sizeof(uint64_t),
"boost::endian only supprts sizeof(double) == 8; please report error to boost mailing list");
uint64_t tmp = reverse_bytes(*(const uint64_t*)&x);
return *(const double*)&tmp;
}
// general reverse_bytes function template implementation approach using std::reverse
// suggested by Mathias Gaunard
template <class T>
inline T reverse_bytes(T x) BOOST_NOEXCEPT
{
T tmp;
T tmp(x);
std::reverse(
reinterpret_cast<const char*>(&x),
reinterpret_cast<const char*>(&x) + sizeof(T),
reinterpret_cast<char*>(&tmp));
reinterpret_cast<char*>(&tmp),
reinterpret_cast<char*>(&tmp) + sizeof(T));
return tmp;
}