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<!-- Creator : groff version 1.19.2 -->
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<!-- CreationDate: Mon Jan 2 17:41:46 2006 -->
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<head>
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<meta name="generator" content="groff -Thtml, see www.gnu.org">
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<title>SWAB</title>
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</head>
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<body>
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<h1 align=center>SWAB</h1>
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2005-03-06 06:11:43 -05:00
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<a href="#NAME">NAME</a><br>
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<a href="#SYNOPSIS">SYNOPSIS</a><br>
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<a href="#DESCRIPTION">DESCRIPTION</a><br>
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<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
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<a href="#SEE ALSO">SEE ALSO</a><br>
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<hr>
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<a name="NAME"></a>
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<h2>NAME</h2>
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<p style="margin-left:11%; margin-top: 1em">TIFFGetBitRevTable,
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TIFFReverseBits, TIFFSwabShort, TIFFSwabLong,
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TIFFSwabArrayOfShort, TIFFSwabArrayOfLong − byte- and
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bit-swapping routines</p>
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<a name="SYNOPSIS"></a>
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<h2>SYNOPSIS</h2>
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<p style="margin-left:11%; margin-top: 1em"><b>#include
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<tiffio.h></b></p>
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<p style="margin-left:11%; margin-top: 1em"><b>const
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unsigned char* TIFFGetBitRevTable(int</b>
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<i>reversed</i><b>) <br>
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void TIFFReverseBits(u_char *</b><i>data</i><b>, unsigned
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long</b> <i>nbytes</i><b>) <br>
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void TIFFSwabShort(uint16 *</b><i>data</i><b>) <br>
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void TIFFSwabLong(uint32 *</b><i>data</i><b>) <br>
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void TIFFSwabArrayOfShort(uint16 *</b><i>data</i><b>,
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unsigned long</b> <i>nshorts</i><b>) <br>
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void TIFFSwabArrayOfLong(uint32 *</b><i>data</i><b>,
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unsigned long</b> <i>nlongs</i><b>)</b></p>
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<a name="DESCRIPTION"></a>
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<h2>DESCRIPTION</h2>
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<p style="margin-left:11%; margin-top: 1em">The following
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routines are used by the library to swap 16- and 32-bit data
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and to reverse the order of bits in bytes.</p>
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<p style="margin-left:11%; margin-top: 1em"><i>TIFFSwabShort</i>
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and <i>TIFFSwabLong</i> swap the bytes in a single 16-bit
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and 32-bit item, respectively. <i>TIFFSwabArrayOfShort</i>
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and <i>TIFFSwabArrayOfLong</i> swap the bytes in an array of
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16-bit and 32-bit items, respectively.</p>
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<p style="margin-left:11%; margin-top: 1em"><i>TIFFReverseBits</i>
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replaces each byte in <i>data</i> with the equivalent
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bit-reversed value. This operation is performed with a
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lookup table, which is returned using the
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<i>TIFFGetBitRevTable</i> function. <i>reversed</i>
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parameter specifies which table should be returned. Supply
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<i>1</i> if you want bit reversal table. Supply <i>0</i> to
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get the table that do not reverse bit values. It is a lookup
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table that can be used as an <i>identity function</i>; i.e.
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<i>TIFFNoBitRevTable[n] == n</i>.</p>
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<a name="DIAGNOSTICS"></a>
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<h2>DIAGNOSTICS</h2>
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<p style="margin-left:11%; margin-top: 1em">None.</p>
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<a name="SEE ALSO"></a>
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<h2>SEE ALSO</h2>
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<p style="margin-left:11%; margin-top: 1em"><b>libtiff</b>(3TIFF)</p>
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<p style="margin-left:11%; margin-top: 1em">Libtiff library
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home page: <b>http://www.remotesensing.org/libtiff/</b></p>
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<hr>
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</html>
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