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tdepim/indexlib/bitio.tcc

92 lines
1.8 KiB

#include "boost-compat/static_assert.hpp"
#include "boost-compat/remove_cv.hpp"
#ifdef HAVE_BOOST
#include <boost/type_traits/is_same.hpp>
#endif
namespace byte_io {
template <typename T>
inline T no_const( const volatile T v ) {
return v;
}
template<typename T>
inline
void write( unsigned char* out, const volatile T d ) {
write( out, no_const( d ) );
}
template <typename T>
inline
T read( const unsigned char* out ) {
//BOOST_STATIC_ASSERT( !( ::boost::is_same<T,typename ::boost::remove_cv<T>::type>::value ) );
return read<typename ::boost::remove_cv<T>::type>( out );
}
template<>
inline
void write<uint8_t>( unsigned char* out, uint8_t d ) {
*out = d;
}
template<>
inline
uint8_t read<uint8_t>( const unsigned char* in ) {
return *in;
}
template<>
struct byte_length_struct<uint8_t> {
static const int value = 1;
};
template<>
inline
void write<uint16_t>( unsigned char* out, uint16_t d ) {
*out++ = ( ( d >> 0 ) & 0xff );
*out++ = ( ( d >> 8 ) & 0xff );
}
template<>
inline
uint16_t read<uint16_t>( const unsigned char* in ) {
uint16_t res = 0;
res |= ( ( *in++ & 0xff ) << 0 );
res |= ( ( *in++ & 0xff ) << 8 );
return res;
}
template<>
struct byte_length_struct<uint16_t> {
static const int value = 2;
};
template<>
inline
void write<uint32_t>( unsigned char* out, uint32_t d ) {
*out++ = ( ( d >> 0 ) & 0xff );
*out++ = ( ( d >> 8 ) & 0xff );
*out++ = ( ( d >> 16 ) & 0xff );
*out++ = ( ( d >> 24 ) & 0xff );
}
template<>
inline
uint32_t read<uint32_t>( const unsigned char* in ) {
uint32_t res = 0;
res |= ( ( *in++ & 0xff ) << 0 );
res |= ( ( *in++ & 0xff ) << 8 );
res |= ( ( *in++ & 0xff ) << 16 );
res |= ( ( *in++ & 0xff ) << 24 );
return res;
}
template<>
struct byte_length_struct<uint32_t> {
static const int value = 4;
};
}