/*
 * File:	EndianUtilities.h
 *
 * Copyright (c) Freescale Semiconductor, Inc. All rights reserved.
 * See included license file for license details.
 */
#if !defined(_EndianUtilities_h_)
#define _EndianUtilities_h_

//! \name Swap macros
//! These macros always swap the data.
//@{

//! Byte swap 16-bit value.
#define _BYTESWAP16(value) (((((uint16_t)value) << 8) & 0xFF00) | ((((uint16_t)value) >> 8) & 0x00FF))

//! Byte swap 32-bit value.
#define _BYTESWAP32(value)                                                                \
    (((((uint32_t)value) << 24) & 0xFF000000) | ((((uint32_t)value) << 8) & 0x00FF0000) | \
     ((((uint32_t)value) >> 8) & 0x0000FF00) | ((((uint32_t)value) >> 24) & 0x000000FF))

//! Byte swap 64-bit value.
#define _BYTESWAP64(value)                                                                                       \
    (((((uint64_t)value) << 56) & 0xFF00000000000000ULL) | ((((uint64_t)value) << 40) & 0x00FF000000000000ULL) | \
     ((((uint64_t)value) << 24) & 0x0000FF0000000000ULL) | ((((uint64_t)value) << 8) & 0x000000FF00000000ULL) |  \
     ((((uint64_t)value) >> 8) & 0x00000000FF000000ULL) | ((((uint64_t)value) >> 24) & 0x0000000000FF0000ULL) |  \
     ((((uint64_t)value) >> 40) & 0x000000000000FF00ULL) | ((((uint64_t)value) >> 56) & 0x00000000000000FFULL))

//@}

//! \name Inline swap functions
//@{

inline uint16_t _swap_u16(uint16_t value)
{
    return _BYTESWAP16(value);
}
inline int16_t _swap_s16(int16_t value)
{
    return (int16_t)_BYTESWAP16((uint16_t)value);
}

inline uint32_t _swap_u32(uint32_t value)
{
    return _BYTESWAP32(value);
}
inline int32_t _swap_s32(int32_t value)
{
    return (int32_t)_BYTESWAP32((uint32_t)value);
}

inline uint64_t _swap_u64(uint64_t value)
{
    return _BYTESWAP64(value);
}
inline int64_t _swap_s64(int64_t value)
{
    return (uint64_t)_BYTESWAP64((uint64_t)value);
}

//@}

#if defined(__LITTLE_ENDIAN__)

/* little endian host */

#define ENDIAN_BIG_TO_HOST_U16(value) (_swap_u16(value))
#define ENDIAN_HOST_TO_BIG_U16(value) (_swap_u16(value))

#define ENDIAN_BIG_TO_HOST_S16(value) (_swap_s16(value))
#define ENDIAN_HOST_TO_BIG_S16(value) (_swap_s16(value))

#define ENDIAN_BIG_TO_HOST_U32(value) (_swap_u32(value))
#define ENDIAN_HOST_TO_BIG_U32(value) (_swap_u32(value))

#define ENDIAN_BIG_TO_HOST_S32(value) (_swap_s32(value))
#define ENDIAN_HOST_TO_BIG_S32(value) (_swap_s32(value))

#define ENDIAN_BIG_TO_HOST_U64(value) (_swap_u64(value))
#define ENDIAN_HOST_TO_BIG_U64(value) (_swap_u64(value))

#define ENDIAN_BIG_TO_HOST_S64(value) (_swap_s64(value))
#define ENDIAN_HOST_TO_BIG_S64(value) (_swap_s64(value))

/* no-ops */

#define ENDIAN_LITTLE_TO_HOST_U16(value) (value)
#define ENDIAN_HOST_TO_LITTLE_U16(value) (value)

#define ENDIAN_LITTLE_TO_HOST_S16(value) (value)
#define ENDIAN_HOST_TO_LITTLE_S16(value) (value)

#define ENDIAN_LITTLE_TO_HOST_U32(value) (value)
#define ENDIAN_HOST_TO_LITTLE_U32(value) (value)

#define ENDIAN_LITTLE_TO_HOST_S32(value) (value)
#define ENDIAN_HOST_TO_LITTLE_S32(value) (value)

#define ENDIAN_LITTLE_TO_HOST_U64(value) (value)
#define ENDIAN_HOST_TO_LITTLE_U64(value) (value)

#define ENDIAN_LITTLE_TO_HOST_S64(value) (value)
#define ENDIAN_HOST_TO_LITTLE_S64(value) (value)

#elif defined(__BIG_ENDIAN__)

/* big endian host */

#define ENDIAN_LITTLE_TO_HOST_U16(value) (_swap_u16(value))
#define ENDIAN_HOST_TO_LITTLE_U16(value) (_swap_u16(value))

#define ENDIAN_LITTLE_TO_HOST_S16(value) (_swap_s16(value))
#define ENDIAN_HOST_TO_LITTLE_S16(value) (_swap_s16(value))

#define ENDIAN_LITTLE_TO_HOST_U32(value) (_swap_u32(value))
#define ENDIAN_HOST_TO_LITTLE_U32(value) (_swap_u32(value))

#define ENDIAN_LITTLE_TO_HOST_S32(value) (_swap_s32(value))
#define ENDIAN_HOST_TO_LITTLE_S32(value) (_swap_s32(value))

#define ENDIAN_LITTLE_TO_HOST_U64(value) (_swap_u64(value))
#define ENDIAN_HOST_TO_LITTLE_U64(value) (_swap_u64(value))

#define ENDIAN_LITTLE_TO_HOST_S64(value) (_swap_s64(value))
#define ENDIAN_HOST_TO_LITTLE_S64(value) (_swap_s64(value))

/* no-ops */

#define ENDIAN_BIG_TO_HOST_U16(value) (value)
#define ENDIAN_HOST_TO_BIG_U16(value) (value)

#define ENDIAN_BIG_TO_HOST_S16(value) (value)
#define ENDIAN_HOST_TO_BIG_S16(value) (value)

#define ENDIAN_BIG_TO_HOST_U32(value) (value)
#define ENDIAN_HOST_TO_BIG_U32(value) (value)

#define ENDIAN_BIG_TO_HOST_S32(value) (value)
#define ENDIAN_HOST_TO_BIG_S32(value) (value)

#define ENDIAN_BIG_TO_HOST_U64(value) (value)
#define ENDIAN_HOST_TO_BIG_U64(value) (value)

#define ENDIAN_BIG_TO_HOST_S64(value) (value)
#define ENDIAN_HOST_TO_BIG_S64(value) (value)

#endif

#endif // _EndianUtilities_h_
