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