endianness.hpp File Reference

A few macros and helper methods related to byte endian-ness. More...

Detailed Description

A few macros and helper methods related to byte endian-ness.

Big endian is preferred in places where we need memcmp correctly work. OTH, little endinan is preferred where the host machine is little endian and we want to do native integer comparison for better performance.

As a result, we use both in our code. Hence, we need to:

• detect whether the host is big endian or little endian
• convert big-endian to/from host-endian (which is probably little-endian).

Definition in file endianness.hpp.

#include <endian.h>
#include <stdint.h>
#include <limits>
#include "foedus/compiler.hpp"

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Namespaces
	foedus
	Root package of FOEDUS (Fast Optimistic Engine for Data Unification Services).
	foedus::assorted
	Assorted Methods/Classes that are too subtle to have their own packages.

Functions
template<typename T >
T	foedus::assorted::betoh (T be_value)
template<>
uint64_t	foedus::assorted::betoh< uint64_t > (uint64_t be_value)
template<>
uint32_t	foedus::assorted::betoh< uint32_t > (uint32_t be_value)
template<>
uint16_t	foedus::assorted::betoh< uint16_t > (uint16_t be_value)
template<>
uint8_t	foedus::assorted::betoh< uint8_t > (uint8_t be_value)
template<>
int64_t	foedus::assorted::betoh< int64_t > (int64_t be_value)
template<>
int32_t	foedus::assorted::betoh< int32_t > (int32_t be_value)
template<>
int16_t	foedus::assorted::betoh< int16_t > (int16_t be_value)
template<>
int8_t	foedus::assorted::betoh< int8_t > (int8_t be_value)
template<typename T >
T	foedus::assorted::htobe (T host_value)
template<>
uint64_t	foedus::assorted::htobe< uint64_t > (uint64_t host_value)
template<>
uint32_t	foedus::assorted::htobe< uint32_t > (uint32_t host_value)
template<>
uint16_t	foedus::assorted::htobe< uint16_t > (uint16_t host_value)
template<>
uint8_t	foedus::assorted::htobe< uint8_t > (uint8_t host_value)
template<>
int64_t	foedus::assorted::htobe< int64_t > (int64_t host_value)
template<>
int32_t	foedus::assorted::htobe< int32_t > (int32_t host_value)
template<>
int16_t	foedus::assorted::htobe< int16_t > (int16_t host_value)
template<>
int8_t	foedus::assorted::htobe< int8_t > (int8_t host_value)
template<typename T >
T	foedus::assorted::read_bigendian (const void *be_bytes)
	Convert a big-endian byte array to a native integer. More...
template<typename T >
void	foedus::assorted::write_bigendian (T host_value, void *be_bytes)
	Convert a native integer to big-endian bytes and write them to the given address. More...

Variables
const bool	foedus::assorted::kIsLittleEndian = false
	A handy const boolean to tell if it's little endina. More...