endian.h

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/*
 * This file is part of LibParserUtils.
 * Licensed under the MIT License,
 *                http://www.opensource.org/licenses/mit-license.php
 * Copyright 2009 John-Mark Bell <jmb@netsurf-browser.org>
 */
 
#ifndef parserutils_endian_h_
#define parserutils_endian_h_
 
static inline bool endian_host_is_le(void)
{
    const uint16_t test = 1;
 
    return ((const uint8_t *) &test)[0];
}
 
static inline uint32_t endian_swap(uint32_t val)
{
    return ((val & 0xff000000) >> 24) | ((val & 0x00ff0000) >> 8) |
        ((val & 0x0000ff00) << 8) | ((val & 0x000000ff) << 24);
}
 
static inline uint32_t endian_host_to_big(uint32_t host)
{
    if (endian_host_is_le())
        return endian_swap(host);
 
    return host;
}
 
static inline uint32_t endian_big_to_host(uint32_t big)
{
    if (endian_host_is_le())
        return endian_swap(big);
 
    return big;
}
 
#endif