compiler.h
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/*
* Keep all the ugly #ifdef for system stuff here
*/
#ifndef __COMPILER_H__
#define __COMPILER_H__
#include <stddef.h>
#ifdef USE_HOSTCC
#if defined(__BEOS__) || \
defined(__NetBSD__) || \
defined(__FreeBSD__) || \
defined(__sun__) || \
defined(__APPLE__)
# include <inttypes.h>
#elif defined(__linux__) || defined(__WIN32__) || defined(__MINGW32__)
# include <stdint.h>
#endif
#include <errno.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#if !defined(__WIN32__) && !defined(__MINGW32__)
# include <sys/mman.h>
#endif
/* Not all systems (like Windows) has this define, and yes
* we do replace/emulate mmap() on those systems ...
*/
#ifndef MAP_FAILED
# define MAP_FAILED ((void *)-1)
#endif
#include <fcntl.h>
#ifndef O_BINARY /* should be define'd on __WIN32__ */
#define O_BINARY 0
#endif
#ifdef __linux__
# include <endian.h>
# include <byteswap.h>
#elif defined(__MACH__) || defined(__FreeBSD__)
# include <machine/endian.h>
typedef unsigned long ulong;
#endif
#ifdef __FreeBSD__
# include <sys/endian.h> /* htole32 and friends */
#endif
#include <time.h>
typedef uint8_t __u8;
typedef uint16_t __u16;
typedef uint32_t __u32;
typedef unsigned int uint;
#define uswap_16(x) \
((((x) & 0xff00) >> 8) | \
(((x) & 0x00ff) << 8))
#define uswap_32(x) \
((((x) & 0xff000000) >> 24) | \
(((x) & 0x00ff0000) >> 8) | \
(((x) & 0x0000ff00) << 8) | \
(((x) & 0x000000ff) << 24))
#define _uswap_64(x, sfx) \
((((x) & 0xff00000000000000##sfx) >> 56) | \
(((x) & 0x00ff000000000000##sfx) >> 40) | \
(((x) & 0x0000ff0000000000##sfx) >> 24) | \
(((x) & 0x000000ff00000000##sfx) >> 8) | \
(((x) & 0x00000000ff000000##sfx) << 8) | \
(((x) & 0x0000000000ff0000##sfx) << 24) | \
(((x) & 0x000000000000ff00##sfx) << 40) | \
(((x) & 0x00000000000000ff##sfx) << 56))
#if defined(__GNUC__)
# define uswap_64(x) _uswap_64(x, ull)
#else
# define uswap_64(x) _uswap_64(x, )
#endif
#if __BYTE_ORDER == __LITTLE_ENDIAN
# define cpu_to_le16(x) (x)
# define cpu_to_le32(x) (x)
# define cpu_to_le64(x) (x)
# define le16_to_cpu(x) (x)
# define le32_to_cpu(x) (x)
# define le64_to_cpu(x) (x)
# define cpu_to_be16(x) uswap_16(x)
# define cpu_to_be32(x) uswap_32(x)
# define cpu_to_be64(x) uswap_64(x)
# define be16_to_cpu(x) uswap_16(x)
# define be32_to_cpu(x) uswap_32(x)
# define be64_to_cpu(x) uswap_64(x)
#else
# define cpu_to_le16(x) uswap_16(x)
# define cpu_to_le32(x) uswap_32(x)
# define cpu_to_le64(x) uswap_64(x)
# define le16_to_cpu(x) uswap_16(x)
# define le32_to_cpu(x) uswap_32(x)
# define le64_to_cpu(x) uswap_64(x)
# define cpu_to_be16(x) (x)
# define cpu_to_be32(x) (x)
# define cpu_to_be64(x) (x)
# define be16_to_cpu(x) (x)
# define be32_to_cpu(x) (x)
# define be64_to_cpu(x) (x)
#endif
#else /* !USE_HOSTCC */
#ifdef CONFIG_USE_STDINT
/* Provided by gcc. */
#include <stdint.h>
#else
/* Type for `void *' pointers. */
typedef unsigned long int uintptr_t;
#endif
#include <linux/string.h>
#include <linux/types.h>
#include <asm/byteorder.h>
#if __SIZEOF_LONG__ == 8
# define __WORDSIZE 64
#elif __SIZEOF_LONG__ == 4
# define __WORDSIZE 32
#else
/*
* Assume 32-bit for now - only newer toolchains support this feature and
* this is only required for sandbox support at present.
*/
#define __WORDSIZE 32
#endif
#endif /* USE_HOSTCC */
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#endif