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11<h1 align=center>SWAB</h1>
12<a href="#NAME">NAME</a><br>
13<a href="#SYNOPSIS">SYNOPSIS</a><br>
14<a href="#DESCRIPTION">DESCRIPTION</a><br>
15<a href="#DIAGNOSTICS">DIAGNOSTICS</a><br>
16<a href="#SEE ALSO">SEE ALSO</a><br>
17
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19<a name="NAME"></a>
20<h2>NAME</h2>
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27<p>TIFFGetBitRevTable, TIFFReverseBits, TIFFSwabShort,
28TIFFSwabLong, TIFFSwabArrayOfShort, TIFFSwabArrayOfLong
29&minus; byte- and bit-swapping routines</p>
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32<a name="SYNOPSIS"></a>
33<h2>SYNOPSIS</h2>
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40<p><b>#include &lt;tiffio.h&gt;</b></p>
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42<p><b>const unsigned char* TIFFGetBitRevTable(int</b>
43<i>reversed</i><b>)<br>
44void TIFFReverseBits(u_char *</b><i>data</i><b>, unsigned
45long</b> <i>nbytes</i><b>)<br>
46void TIFFSwabShort(uint16 *</b><i>data</i><b>)<br>
47void TIFFSwabLong(uint32 *</b><i>data</i><b>)<br>
48void TIFFSwabArrayOfShort(uint16 *</b><i>data</i><b>,
49unsigned long</b> <i>nshorts</i><b>)<br>
50void TIFFSwabArrayOfLong(uint32 *</b><i>data</i><b>,
51unsigned long</b> <i>nlongs</i><b>)</b></p>
52</td>
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54<a name="DESCRIPTION"></a>
55<h2>DESCRIPTION</h2>
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62<p>The following routines are used by the library to swap
6316- and 32-bit data and to reverse the order of bits in
64bytes.</p>
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66<p><i>TIFFSwabShort</i> and <i>TIFFSwabLong</i> swap the
67bytes in a single 16-bit and 32-bit item, respectively.
68<i>TIFFSwabArrayOfShort</i> and <i>TIFFSwabArrayOfLong</i>
69swap the bytes in an array of 16-bit and 32-bit items,
70respectively.</p>
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72<p><i>TIFFReverseBits</i> replaces each byte in <i>data</i>
73with the equivalent bit-reversed value. This operation is
74performed with a lookup table, which is returned using the
75<i>TIFFGetBitRevTable</i> function. <i>reversed</i>
76parameter specifies which table should be returned. Supply
77<i>1</i> if you want bit reversal table. Supply <i>0</i> to
78get the table that do not reverse bit values. It is a lookup
79table that can be used as an <i>identity function</i>; i.e.
80<i>TIFFNoBitRevTable[n] == n</i>.</p>
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83<a name="DIAGNOSTICS"></a>
84<h2>DIAGNOSTICS</h2>
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91<p>None.</p>
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94<a name="SEE ALSO"></a>
95<h2>SEE ALSO</h2>
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102<p><b>libtiff</b>(3TIFF)</p>
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104<p>Libtiff library home page:
105<b>http://www.simplesystems.org/libtiff/</b></p>
106</td>
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