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338 jermar 1 
/*
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 * Copyright (c) 2005 Jakub Jermar
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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/** @addtogroup libc
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 * @{
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 */
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/** @file
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 */
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#ifndef LIBC_BYTEORDER_H_
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#define LIBC_BYTEORDER_H_
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#include <libarch/byteorder.h>
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#include <stdint.h>
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#if !(defined(ARCH_IS_BIG_ENDIAN) ^ defined(ARCH_IS_LITTLE_ENDIAN))
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#error The architecture must be either big-endian or little-endian.
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#endif
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#ifdef ARCH_IS_BIG_ENDIAN
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#define uint16_t_le2host(n)     uint16_t_byteorder_swap(n)
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#define uint32_t_le2host(n)     uint32_t_byteorder_swap(n)
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#define uint64_t_le2host(n)     uint64_t_byteorder_swap(n)
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#define uint16_t_be2host(n)     (n)
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#define uint32_t_be2host(n)     (n)
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#define uint64_t_be2host(n)     (n)
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#else
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#define uint16_t_le2host(n)     (n)
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#define uint32_t_le2host(n)     (n)
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#define uint64_t_le2host(n)     (n)
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#define uint16_t_be2host(n)     uint16_t_byteorder_swap(n)
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#define uint32_t_be2host(n)     uint32_t_byteorder_swap(n)
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#define uint64_t_be2host(n)     uint64_t_byteorder_swap(n)
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#endif
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static inline uint64_t uint64_t_byteorder_swap(uint64_t n)
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{
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    return ((n & 0xff) << 56) |
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        ((n & 0xff00) << 40) |
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        ((n & 0xff0000) << 24) |
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        ((n & 0xff000000LL) << 8) |
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        ((n & 0xff00000000LL) >> 8) |
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        ((n & 0xff0000000000LL) >> 24) |
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        ((n & 0xff000000000000LL) >> 40) |
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        ((n & 0xff00000000000000LL) >> 56);
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}
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static inline uint32_t uint32_t_byteorder_swap(uint32_t n)
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{
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    return ((n & 0xff) << 24) |
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        ((n & 0xff00) << 8) |
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        ((n & 0xff0000) >> 8) |
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        ((n & 0xff000000) >> 24);
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}
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static inline uint16_t uint16_t_byteorder_swap(uint16_t n)
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{
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    return ((n & 0xff) << 8) |
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        ((n & 0xff00) >> 8);
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}
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#endif
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/** @}
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 */