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endian.h
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#ifndef __endian_h
#define __endian_h
#ifndef CONFIG
#define CONFIG "config.h"
#endif // CONFIG
#include CONFIG
//
// Unaligned access
//
#if !defined(NO_COMPILER_UAA)
#define UAA16(p, i) (((PACKED16*)p)->val[i])
#define UAA32(p, i) (((PACKED32*)p)->val[i])
#define UAA64(p, i) (((PACKED64*)p)->val[i])
#endif
//
//Byteswap: Use compiler support if available
//
#ifndef NO_COMPILER_UAA
#ifdef __has_builtin // Clang supports this
#if __has_builtin(__builtin_bswap16)
#define BS16(x) __builtin_bswap16(x)
#endif
#if __has_builtin(__builtin_bswap32)
#define BS32(x) __builtin_bswap32(x)
#endif
#if __has_builtin(__builtin_bswap64)
#define BS64(x) __builtin_bswap64(x)
#endif
#endif // has_builtin
#ifdef __GNUC__ // GNU C >= 4.3 has bswap32 and bswap64. GNU C >= 4.8 also has bswap16
#if (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ > 2)
#ifndef BS32
#define BS32(x) __builtin_bswap32(x)
#endif
#ifndef BS64
#define BS64(x) __builtin_bswap64(x)
#endif
#if (__GNUC__ > 4) || (__GNUC_MINOR__ > 7)
#ifndef BS16
#define BS16(x) __builtin_bswap16(x)
#endif
#endif // GNU C > 4.7
#endif // __GNUC__ > 4
#endif // __GNUC__
#endif // NO_COMPILER_UAA
//
// Byteorder
//
#if defined(__linux__) || defined(__GLIBC__) || defined(__CYGWIN__)
#include <endian.h>
#include <byteswap.h>
#ifndef BS16
#define BS16(x) bswap_16(x)
#endif
#ifndef BS32
#define BS32(x) bswap_32(x)
#endif
#ifndef BS64
#define BS64(x) bswap_64(x)
#endif
#elif defined(__sun__)
#include <sys/byteorder.h>
#ifndef BS16
#define BS16(x) BSWAP_16(x)
#endif
#ifndef BS32
#define BS32(x) BSWAP_32(x)
#endif
#ifndef BS64
#define BS64(x) BSWAP_64(x)
#endif
#define __LITTLE_ENDIAN 1234
#define __BIG_ENDIAN 4321
#ifdef _LITTLE_ENDIAN
#define __BYTE_ORDER __LITTLE_ENDIAN
#else
#define __BYTE_ORDER __BIG_ENDIAN
#endif
#elif __minix__ || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || defined(__OpenBSD__)
#include <sys/types.h>
#include <sys/endian.h>
#define __BYTE_ORDER _BYTE_ORDER
#define __LITTLE_ENDIAN _LITTLE_ENDIAN
#define __BIG_ENDIAN _BIG_ENDIAN
#ifdef __OpenBSD__
#ifndef BS16
#define BS16 swap16
#endif
#ifndef BS32
#define BS32 swap32
#endif
#ifndef BS64
#define BS64 swap64
#endif
#else // !__OpenBSD__
#ifndef BS16
#define BS16 bswap16
#endif
#ifndef BS32
#define BS32 bswap32
#endif
#ifndef BS64
#define BS64 bswap64
#endif
#endif // !__OpenBSD__
#elif defined(__APPLE__)
#include <sys/types.h>
#include <machine/endian.h>
#include <libkern/OSByteOrder.h>
#define __BYTE_ORDER _BYTE_ORDER
#define __LITTLE_ENDIAN _LITTLE_ENDIAN
#define __BIG_ENDIAN _BIG_ENDIAN
#ifndef BS16
#define BS16 OSSwapInt16
#endif
#ifndef BS32
#define BS32 OSSwapInt32
#endif
#ifndef BS64
#define BS64 OSSwapInt64
#endif
#elif defined(_WIN32)
#define __LITTLE_ENDIAN 1234
#define __BIG_ENDIAN 4321
#define __BYTE_ORDER __LITTLE_ENDIAN
#include <stdlib.h>
#ifndef BS16
#define BS16 _byteswap_ushort
#endif
#ifndef BS32
#define BS32 _byteswap_ulong
#endif
#ifndef BS64
#define BS64 _byteswap_uint64
#endif
#endif // Byteorder in different OS
#if defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && defined(__LITTLE_ENDIAN) \
&& defined(BS16) && defined(BS32) && defined(BS64)
#if __BYTE_ORDER == __LITTLE_ENDIAN
#define __BE16(x) BS16(x)
#define __LE16(x) (x)
#define __BE32(x) BS32(x)
#define __LE32(x) (x)
#define __BE64(x) BS64(x)
#define __LE64(x) (x)
#define PUT_UA16(p, v) PUT_UA16LE(p, v)
#define PUT_UA32(p, v) PUT_UA32LE(p, v)
#define PUT_UA64(p, v) PUT_UA64LE(p, v)
#else // __BYTE_ORDER == __BIG_ENDIAN
#define __BE16(x) (x)
#define __LE16(x) BS16(x)
#define __BE32(x) (x)
#define __LE32(x) BS32(x)
#define __BE64(x) (x)
#define __LE64(x) BS64(x)
#define PUT_UA16(p, v) PUT_UA16BE(p, v)
#define PUT_UA32(p, v) PUT_UA32BE(p, v)
#define PUT_UA64(p, v) PUT_UA64BE(p, v)
#endif // __BYTE_ORDER
#define BE16(x) __BE16(x)
#define LE16(x) __LE16(x)
#define BE32(x) __BE32(x)
#define LE32(x) __LE32(x)
#define BE64(x) __BE64(x)
#define LE64(x) __LE64(x)
#else
extern unsigned short BE16(unsigned short x);
extern unsigned short LE16(unsigned short x);
extern unsigned int BE32(unsigned int x);
extern unsigned int LE32(unsigned int x);
extern unsigned long long BE64(unsigned long long x);
extern unsigned long long LE64(unsigned long long x);
#endif // defined(__BYTE_ORDER)
#if defined(__BYTE_ORDER) && defined(__BIG_ENDIAN) && defined(__LITTLE_ENDIAN) \
&& defined(BS16) && defined(BS32) && defined(BS64) &&!defined(NO_COMPILER_UAA)
#define PUT_UAA64BE(p, v, i) ( UAA64(p, i) = __BE64(v) )
#define PUT_UAA32BE(p, v, i) ( UAA32(p, i) = __BE32(v) )
#define PUT_UAA16BE(p, v, i) ( UAA16(p, i) = __BE16(v) )
#define PUT_UAA64LE(p, v, i) ( UAA64(p, i) = __LE64(v) )
#define PUT_UAA32LE(p, v, i) ( UAA32(p, i) = __LE32(v) )
#define PUT_UAA16LE(p, v, i) ( UAA16(p, i) = __LE16(v) )
#define GET_UAA64BE(p, i) __BE64(UAA64(p, i))
#define GET_UAA32BE(p, i) __BE32(UAA32(p, i))
#define GET_UAA16BE(p, i) __BE16(UAA16(p, i))
#define GET_UAA64LE(p, i) __LE64(UAA64(p, i))
#define GET_UAA32LE(p, i) __LE32(UAA32(p, i))
#define GET_UAA16LE(p, i) __LE16(UAA16(p, i))
#else // ! defined(__BYTE_ORDER)
extern void PUT_UAA64BE(void* p, unsigned long long v, unsigned int i);
extern void PUT_UAA32BE(void* p, unsigned int v, unsigned int i);
extern void PUT_UAA16BE(void* p, unsigned short v, unsigned int i);
extern void PUT_UAA64LE(void* p, unsigned long long v, unsigned int i);
extern void PUT_UAA32LE(void* p, unsigned int v, unsigned int i);
extern void PUT_UAA16LE(void* p, unsigned short v, unsigned int i);
extern unsigned long long GET_UAA64BE(void* p, unsigned int i);
extern unsigned int GET_UAA32BE(void* p, unsigned int i);
extern unsigned short GET_UAA16BE(void* p, unsigned int i);
extern unsigned long long GET_UAA64LE(void* p, unsigned int i);
extern unsigned int GET_UAA32LE(void* p, unsigned int i);
extern unsigned short GET_UAA16LE(void* p, unsigned int i);
#endif
#define PUT_UA64BE(p, v) PUT_UAA64BE(p, v, 0)
#define PUT_UA32BE(p, v) PUT_UAA32BE(p, v, 0)
#define PUT_UA16BE(p, v) PUT_UAA16BE(p, v, 0)
#define PUT_UA64LE(p, v) PUT_UAA64LE(p, v, 0)
#define PUT_UA32LE(p, v) PUT_UAA32LE(p, v, 0)
#define PUT_UA16LE(p, v) PUT_UAA16LE(p, v, 0)
#define GET_UA64BE(p) GET_UAA64BE(p, 0)
#define GET_UA32BE(p) GET_UAA32BE(p, 0)
#define GET_UA16BE(p) GET_UAA16BE(p, 0)
#define GET_UA64LE(p) GET_UAA64LE(p, 0)
#define GET_UA32LE(p) GET_UAA32LE(p, 0)
#define GET_UA16LE(p) GET_UAA16LE(p, 0)
#endif // __endian_h