43 lines
1.0 KiB
C
43 lines
1.0 KiB
C
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/* @(#)swabbytes.c 1.10 10/08/21 Copyright 1988, 1995-2010 J. Schilling */
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/*
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* swab bytes in memory
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*
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* Copyright (c) 1988, 1995-2010 J. Schilling
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*/
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/*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* See the file CDDL.Schily.txt in this distribution for details.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file CDDL.Schily.txt from this distribution.
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*/
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#include <schily/standard.h>
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#include <schily/types.h>
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#include <schily/schily.h>
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#define DO8(a) a; a; a; a; a; a; a; a;
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EXPORT void
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swabbytes(vp, cnt)
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void *vp;
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register ssize_t cnt;
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{
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register char *bp = (char *)vp;
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register char c;
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cnt /= 2; /* even count only */
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while ((cnt -= 8) >= 0) {
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/* CSTYLED */
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DO8(c = *bp++; bp[-1] = *bp; *bp++ = c;);
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}
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cnt += 8;
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while (--cnt >= 0) {
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c = *bp++; bp[-1] = *bp; *bp++ = c;
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}
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}
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