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/* $OpenBSD: swab.c,v 1.9 2014/12/11 23:05:38 tedu Exp $ */ |
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/* |
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* Copyright (c) 2014 Ted Unangst <tedu@openbsd.org> |
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* |
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* Permission to use, copy, modify, and distribute this software for any |
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* purpose with or without fee is hereby granted, provided that the above |
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* copyright notice and this permission notice appear in all copies. |
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* |
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
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*/ |
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#include <unistd.h> |
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void |
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swab(const void *__restrict from, void *__restrict to, ssize_t len) |
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{ |
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const unsigned char *src = from; |
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unsigned char *dst = to; |
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unsigned char t0, t1; |
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while (len > 1) { |
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t0 = src[0]; |
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t1 = src[1]; |
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dst[0] = t1; |
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dst[1] = t0; |
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src += 2; |
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dst += 2; |
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len -= 2; |
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} |
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} |