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/*! \file endian.h
 *  Architecture endianness
 *
 *  \addtogroup gmio_core
 *  @{
 */

#pragma once

#include "global.h"

/*! Common endianness (byte order) of computer memory */
enum gmio_endianness
{
    /*! Other (unknown) byte-order */
    GMIO_ENDIANNESS_UNKNOWN = 0,

    /*! The least significant byte is stored at the lowest address. The other
     *  bytes follow in increasing order of significance */
    GMIO_ENDIANNESS_LITTLE,

    /*! The most significant byte is stored at the lowest address. The other
     *  bytes follow in decreasing order of significance */
    GMIO_ENDIANNESS_BIG,

#ifdef GMIO_HOST_IS_BIG_ENDIAN
    GMIO_ENDIANNESS_HOST = GMIO_ENDIANNESS_BIG
#else
    /*! Endianness(byte order) used by the host computer for storing data in
     *  memory.
     *
     *  Set at configure-time to either GMIO_ENDIANNESS_LITTLE or
     *  GMIO_ENDIANNESS_BIG */
    GMIO_ENDIANNESS_HOST = GMIO_ENDIANNESS_LITTLE
#endif
};

GMIO_C_LINKAGE_BEGIN

/*! Returns endianness (byte order) of the host's CPU architecture */
GMIO_API enum gmio_endianness gmio_host_endianness();

GMIO_C_LINKAGE_END

/*! @} */