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/* Copyright (C) 2001, 2002, 2003 by Hans Reiser, licensing governed by
libaal/COPYING.
endian.h -- endianess translation macros. This is a number of macro because
macro is better for performance than to use functions which are determining
the translation kind in the run time. */
#ifndef AAL_ENDIAN_H
#define AAL_ENDIAN_H
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <aal/types.h>
#define __aal_get_octave(x, n) ( ((x) >> (8 * (n))) & 0xff )
#define __aal_swap16(x) ( (__aal_get_octave(x, 0) << 8) \
+ (__aal_get_octave(x, 1) << 0) )
#define __aal_swap32(x) ( (__aal_get_octave(x, 0) << 24) \
+ (__aal_get_octave(x, 1) << 16) \
+ (__aal_get_octave(x, 2) << 8) \
+ (__aal_get_octave(x, 3) << 0) )
#define __aal_swap64(x) ( (__aal_get_octave(x, 0) << 56) \
+ (__aal_get_octave(x, 1) << 48) \
+ (__aal_get_octave(x, 2) << 40) \
+ (__aal_get_octave(x, 3) << 32) \
+ (__aal_get_octave(x, 4) << 24) \
+ (__aal_get_octave(x, 5) << 16) \
+ (__aal_get_octave(x, 6) << 8) \
+ (__aal_get_octave(x, 7) << 0) )
#define aal_swap16(x) ((uint16_t) __aal_swap16((uint16_t)x))
#define aal_swap32(x) ((uint32_t) __aal_swap32((uint32_t)x))
#define aal_swap64(x) ((uint64_t) __aal_swap64((uint64_t)x))
/*
Endianess is determined by configure script in the configuring time, that is
before compiling the package.
*/
#ifdef WORDS_BIGENDIAN
# define CPU_TO_LE16(x) aal_swap16(x)
# define CPU_TO_BE16(x) (x)
# define CPU_TO_LE32(x) aal_swap32(x)
# define CPU_TO_BE32(x) (x)
# define CPU_TO_LE64(x) aal_swap64(x)
# define CPU_TO_BE64(x) (x)
# define LE16_TO_CPU(x) aal_swap16(x)
# define BE16_TO_CPU(x) (x)
# define LE32_TO_CPU(x) aal_swap32(x)
# define BE32_TO_CPU(x) (x)
# define LE64_TO_CPU(x) aal_swap64(x)
# define BE64_TO_CPU(x) (x)
#else
# define CPU_TO_LE16(x) (x)
# define CPU_TO_BE16(x) aal_swap16(x)
# define CPU_TO_LE32(x) (x)
# define CPU_TO_BE32(x) aal_swap32(x)
# define CPU_TO_LE64(x) (x)
# define CPU_TO_BE64(x) aal_swap64(x)
# define LE16_TO_CPU(x) (x)
# define BE16_TO_CPU(x) aal_swap16(x)
# define LE32_TO_CPU(x) (x)
# define BE32_TO_CPU(x) aal_swap32(x)
# define LE64_TO_CPU(x) (x)
# define BE64_TO_CPU(x) aal_swap64(x)
#endif
#define aal_get_leXX(xx, p, field) (LE##xx##_TO_CPU (get_unaligned((&(p)->field))))
#define aal_set_leXX(xx, p, field, val) put_unaligned(CPU_TO_LE##xx(val), (&(p)->field))
#define aal_get_le16(p, field) aal_get_leXX(16, p, field)
#define aal_set_le16(p, field, val) aal_set_leXX(16, p, field, val)
#define aal_get_le32(p, field) aal_get_leXX(32, p, field)
#define aal_set_le32(p, field, val) aal_set_leXX(32, p, field, val)
#define aal_get_le64(p, field) aal_get_leXX(64, p, field)
#define aal_set_le64(p, field, val) aal_set_leXX(64, p, field, val)
#endif
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