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108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
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// Inferno libmach/swap.c
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// http://code.google.com/p/inferno-os/source/browse/utils/libmach/swap.c
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//
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// Copyright © 1994-1999 Lucent Technologies Inc.
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// Power PC support Copyright © 1995-2004 C H Forsyth (forsyth@terzarima.net).
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// Portions Copyright © 1997-1999 Vita Nuova Limited.
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// Portions Copyright © 2000-2007 Vita Nuova Holdings Limited (www.vitanuova.com).
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// Revisions Copyright © 2000-2004 Lucent Technologies Inc. and others.
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// Portions Copyright © 2009 The Go Authors. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#include <u.h>
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/*
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* big-endian short
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*/
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ushort
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beswab(ushort s)
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{
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uchar *p;
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p = (uchar*)&s;
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return (p[0]<<8) | p[1];
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}
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/*
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* big-endian long
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*/
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ulong
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beswal(ulong l)
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{
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uchar *p;
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p = (uchar*)&l;
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return (p[0]<<24) | (p[1]<<16) | (p[2]<<8) | p[3];
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}
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/*
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* big-endian vlong
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*/
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uvlong
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beswav(uvlong v)
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{
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uchar *p;
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p = (uchar*)&v;
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return ((uvlong)p[0]<<56) | ((uvlong)p[1]<<48) | ((uvlong)p[2]<<40)
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| ((uvlong)p[3]<<32) | ((uvlong)p[4]<<24)
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| ((uvlong)p[5]<<16) | ((uvlong)p[6]<<8)
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| (uvlong)p[7];
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}
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/*
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* little-endian short
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*/
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ushort
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leswab(ushort s)
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{
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uchar *p;
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p = (uchar*)&s;
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return (p[1]<<8) | p[0];
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}
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/*
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* little-endian long
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*/
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ulong
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leswal(ulong l)
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{
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uchar *p;
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p = (uchar*)&l;
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return (p[3]<<24) | (p[2]<<16) | (p[1]<<8) | p[0];
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}
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/*
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* little-endian vlong
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*/
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uvlong
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leswav(uvlong v)
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{
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uchar *p;
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p = (uchar*)&v;
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return ((uvlong)p[7]<<56) | ((uvlong)p[6]<<48) | ((uvlong)p[5]<<40)
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| ((uvlong)p[4]<<32) | ((uvlong)p[3]<<24)
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| ((uvlong)p[2]<<16) | ((uvlong)p[1]<<8)
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| (uvlong)p[0];
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}
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