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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>
    
    extern int errno;
    
    #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__)
    # include <machine/endian.h>
    typedef unsigned long ulong;
    typedef unsigned int  uint;
    #endif
    
    typedef uint8_t __u8;
    typedef uint16_t __u16;
    typedef uint32_t __u32;
    
    #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 */
    
    #include <linux/string.h>
    #include <linux/types.h>
    #include <asm/byteorder.h>
    
    /* Types for `void *' pointers. */
    #if __WORDSIZE == 64
    typedef unsigned long int       uintptr_t;
    #else
    typedef unsigned int            uintptr_t;
    #endif
    
    #endif
    
    
    /* compiler options */
    #define uninitialized_var(x)		x = x