tool/byteorder.h
author Florian Pose <fp@igh-essen.com>
Mon, 28 Jul 2008 12:11:50 +0000
changeset 1159 25cc77cf3993
parent 1142 59be91dfcbe1
permissions -rw-r--r--
Improved alias/position addressing in case od duplicated aliases.
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/*****************************************************************************
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 *
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 * $Id$
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 *
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 ****************************************************************************/
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#include <sys/types.h>
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/*****************************************************************************/
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#define swap16(x) \
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        ((uint16_t)( \
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        (((uint16_t)(x) & 0x00ffU) << 8) | \
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        (((uint16_t)(x) & 0xff00U) >> 8) ))
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#define swap32(x) \
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        ((uint32_t)( \
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        (((uint32_t)(x) & 0x000000ffUL) << 24) | \
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        (((uint32_t)(x) & 0x0000ff00UL) <<  8) | \
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        (((uint32_t)(x) & 0x00ff0000UL) >>  8) | \
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        (((uint32_t)(x) & 0xff000000UL) >> 24) ))
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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#define le16tocpu(x) x
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#define le32tocpu(x) x
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#define cputole16(x) x
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#define cputole32(x) x
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#elif __BYTE_ORDER == __BIG_ENDIAN
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#define le16tocpu(x) swap16(x)
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#define le32tocpu(x) swap32(x)
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#define cputole16(x) swap16(x)
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#define cputole32(x) swap32(x)
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#endif
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/****************************************************************************/