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<h1>include/sphinxbase/byteorder.h</h1> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */</span>
<a name="l00002"></a>00002 <span class="comment">/* ====================================================================</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (c) 1999-2001 Carnegie Mellon University. All rights</span>
<a name="l00004"></a>00004 <span class="comment"> * reserved.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00007"></a>00007 <span class="comment"> * modification, are permitted provided that the following conditions</span>
<a name="l00008"></a>00008 <span class="comment"> * are met:</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span>
<a name="l00011"></a>00011 <span class="comment"> * notice, this list of conditions and the following disclaimer. </span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span>
<a name="l00014"></a>00014 <span class="comment"> * notice, this list of conditions and the following disclaimer in</span>
<a name="l00015"></a>00015 <span class="comment"> * the documentation and/or other materials provided with the</span>
<a name="l00016"></a>00016 <span class="comment"> * distribution.</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * This work was supported in part by funding from the Defense Advanced </span>
<a name="l00019"></a>00019 <span class="comment"> * Research Projects Agency and the National Science Foundation of the </span>
<a name="l00020"></a>00020 <span class="comment"> * United States of America, and the CMU Sphinx Speech Consortium.</span>
<a name="l00021"></a>00021 <span class="comment"> *</span>
<a name="l00022"></a>00022 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND </span>
<a name="l00023"></a>00023 <span class="comment"> * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, </span>
<a name="l00024"></a>00024 <span class="comment"> * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span>
<a name="l00025"></a>00025 <span class="comment"> * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY</span>
<a name="l00026"></a>00026 <span class="comment"> * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00027"></a>00027 <span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT </span>
<a name="l00028"></a>00028 <span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, </span>
<a name="l00029"></a>00029 <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY </span>
<a name="l00030"></a>00030 <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT </span>
<a name="l00031"></a>00031 <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE </span>
<a name="l00032"></a>00032 <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00033"></a>00033 <span class="comment"> *</span>
<a name="l00034"></a>00034 <span class="comment"> * ====================================================================</span>
<a name="l00035"></a>00035 <span class="comment"> *</span>
<a name="l00036"></a>00036 <span class="comment"> */</span>
<a name="l00037"></a>00037
<a name="l00038"></a>00038 <span class="comment">/*</span>
<a name="l00039"></a>00039 <span class="comment"> * byteorder.h -- Byte swapping ordering macros.</span>
<a name="l00040"></a>00040 <span class="comment"> * </span>
<a name="l00041"></a>00041 <span class="comment"> * **********************************************</span>
<a name="l00042"></a>00042 <span class="comment"> * CMU ARPA Speech Project</span>
<a name="l00043"></a>00043 <span class="comment"> *</span>
<a name="l00044"></a>00044 <span class="comment"> * Copyright (c) 1996 Carnegie Mellon University.</span>
<a name="l00045"></a>00045 <span class="comment"> * ALL RIGHTS RESERVED.</span>
<a name="l00046"></a>00046 <span class="comment"> * **********************************************</span>
<a name="l00047"></a>00047 <span class="comment"> * </span>
<a name="l00048"></a>00048 <span class="comment"> * HISTORY</span>
<a name="l00049"></a>00049 <span class="comment"> * </span>
<a name="l00050"></a>00050 <span class="comment"> * $Log: byteorder.h,v $</span>
<a name="l00051"></a>00051 <span class="comment"> * Revision 1.8 2005/09/01 21:09:54 dhdfu</span>
<a name="l00052"></a>00052 <span class="comment"> * Really, actually, truly consolidate byteswapping operations into</span>
<a name="l00053"></a>00053 <span class="comment"> * byteorder.h. Where unconditional byteswapping is needed, SWAP_INT32()</span>
<a name="l00054"></a>00054 <span class="comment"> * and SWAP_INT16() are to be used. The WORDS_BIGENDIAN macro from</span>
<a name="l00055"></a>00055 <span class="comment"> * autoconf controls the functioning of the conditional swap macros</span>
<a name="l00056"></a>00056 <span class="comment"> * (SWAP_?[LW]) whose names and semantics have been regularized.</span>
<a name="l00057"></a>00057 <span class="comment"> * Private, adhoc macros have been removed.</span>
<a name="l00058"></a>00058 <span class="comment"> *</span>
<a name="l00059"></a>00059 <span class="comment"> */</span>
<a name="l00060"></a>00060
<a name="l00061"></a>00061 <span class="preprocessor">#ifndef __S2_BYTEORDER_H__</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span><span class="preprocessor">#define __S2_BYTEORDER_H__ 1</span>
<a name="l00063"></a>00063 <span class="preprocessor"></span>
<a name="l00064"></a>00064 <span class="comment">/* Macro to byteswap an int16 variable. x = ptr to variable */</span>
<a name="l00065"></a>00065 <span class="preprocessor">#define SWAP_INT16(x) *(x) = ((0x00ff & (*(x))>>8) | (0xff00 & (*(x))<<8))</span>
<a name="l00066"></a>00066 <span class="preprocessor"></span>
<a name="l00067"></a>00067 <span class="comment">/* Macro to byteswap an int32 variable. x = ptr to variable */</span>
<a name="l00068"></a>00068 <span class="preprocessor">#define SWAP_INT32(x) *(x) = ((0x000000ff & (*(x))>>24) | \</span>
<a name="l00069"></a>00069 <span class="preprocessor"> (0x0000ff00 & (*(x))>>8) | \</span>
<a name="l00070"></a>00070 <span class="preprocessor"> (0x00ff0000 & (*(x))<<8) | \</span>
<a name="l00071"></a>00071 <span class="preprocessor"> (0xff000000 & (*(x))<<24))</span>
<a name="l00072"></a>00072 <span class="preprocessor"></span>
<a name="l00073"></a>00073 <span class="comment">/* Macro to byteswap a float32 variable. x = ptr to variable */</span>
<a name="l00074"></a>00074 <span class="preprocessor">#define SWAP_FLOAT32(x) SWAP_INT32((int32 *) x)</span>
<a name="l00075"></a>00075 <span class="preprocessor"></span>
<a name="l00076"></a>00076 <span class="comment">/* Macro to byteswap a float64 variable. x = ptr to variable */</span>
<a name="l00077"></a>00077 <span class="preprocessor">#define SWAP_FLOAT64(x) { int *low = (int *) (x), *high = (int *) (x) + 1,\</span>
<a name="l00078"></a>00078 <span class="preprocessor"> temp;\</span>
<a name="l00079"></a>00079 <span class="preprocessor"> SWAP_INT32(low); SWAP_INT32(high);\</span>
<a name="l00080"></a>00080 <span class="preprocessor"> temp = *low; *low = *high; *high = temp;}</span>
<a name="l00081"></a>00081 <span class="preprocessor"></span>
<a name="l00082"></a>00082 <span class="preprocessor">#ifdef WORDS_BIGENDIAN</span>
<a name="l00083"></a>00083 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_BE_64(x)</span>
<a name="l00084"></a>00084 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_BE_32(x)</span>
<a name="l00085"></a>00085 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_BE_16(x)</span>
<a name="l00086"></a>00086 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_LE_64(x) SWAP_FLOAT64(x)</span>
<a name="l00087"></a>00087 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_LE_32(x) SWAP_INT32(x)</span>
<a name="l00088"></a>00088 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_LE_16(x) SWAP_INT16(x)</span>
<a name="l00089"></a>00089 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00090"></a>00090 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_LE_64(x)</span>
<a name="l00091"></a>00091 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_LE_32(x)</span>
<a name="l00092"></a>00092 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_LE_16(x)</span>
<a name="l00093"></a>00093 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_BE_64(x) SWAP_FLOAT64(x)</span>
<a name="l00094"></a>00094 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_BE_32(x) SWAP_INT32(x)</span>
<a name="l00095"></a>00095 <span class="preprocessor"></span><span class="preprocessor">#define SWAP_BE_16(x) SWAP_INT16(x)</span>
<a name="l00096"></a>00096 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00097"></a>00097 <span class="preprocessor"></span>
<a name="l00098"></a>00098 <span class="preprocessor">#endif</span>
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