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<refentry id="TIFFswab-3tiff">

<refmeta><refentrytitle>TIFFswab</refentrytitle><manvolnum>3tiff</manvolnum>

<refmiscinfo class="date">05 Apr 2004</refmiscinfo>

<refmiscinfo class="sectdesc">&man3;</refmiscinfo>

<refmiscinfo class="software">&release;</refmiscinfo>

<refmiscinfo class="arch">generic</refmiscinfo>

<refmiscinfo class="copyright">&suncopy;</refmiscinfo>

</refmeta>

<indexterm><primary>TIFFswab</primary></indexterm><indexterm><primary>byte-

and bit-swapping routines</primary></indexterm>

<refnamediv id="TIFFswab-3tiff-name"><refdescriptor>TIFFswab</refdescriptor>

<refname>TIFFGetBitRevTable<?Pub Caret></refname><refname>TIFFReverseBits

</refname><refname>TIFFSwabShort</refname><refname>TIFFSwabLong</refname>

<refname>TIFFSwabArrayOfShort</refname><refname>TIFFSwabArrayOfLong</refname>

<refpurpose>byte- and bit-swapping routines</refpurpose></refnamediv>

<refsect1 id="TIFFswab-3tiff-synp"><title>&synp-tt;</title>

<programlisting>#include &lt;tiffio.h>

const unsigned char* TIFFGetBitRevTable(int reversed);

void TIFFReverseBits(u_char* data, unsigned long nbytes)

void TIFFSwabShort(uint16* data)

void TIFFSwabLong(uint32* data)

void TIFFSwabArrayOfShort(uint16* data, unsigned long nshorts)

void TIFFSwabArrayOfLong(uint32* data, unsigned long nlongs)

</programlisting>

</refsect1>

<refsect1 id="TIFFswab-3tiff-desc"><title>&desc-tt;</title>

<para>The following routines are used by the library to swap 16- and 32-bit

data and to reverse the order of bits in bytes.</para>

<para><literal>TIFFSwabShort</literal> and <literal>TIFFSwabLong</literal>

swap the bytes in a single 16-bit and 32-bit item, respectively.</para>

<para><literal>TIFFSwabArrayOfShort</literal> and <literal>TIFFSwabArrayOfLong

</literal> swap the bytes in an array of 16-bit and 32-bit items, respectively.

</para>

<para><literal>TIFFReverseBits</literal> replaces each byte in data with the

equivalent bit-reversed value. This operation is done with a lookup table, <literal>

TIFFBitRevTable</literal>, which is declared public. A second table, <literal>

TIFFNoBitRevTable</literal>, is also declared public, and is a lookup table

that can be used as an identity function. That is, <literal>TIFFNoBitRevTable[n]

== n</literal>.</para>

</refsect1>

<refsect1 id="TIFFswab-3tiff-attr"><title>&attr-tt;</title>

<para>See <olink targetdocent="REFMAN5" localinfo="attributes-5"><citerefentry>

<refentrytitle>attributes</refentrytitle><manvolnum>5</manvolnum></citerefentry></olink>

for descriptions of the following attributes:</para>

<informaltable frame="all">

<tgroup cols="2" colsep="1" rowsep="1"><colspec colname="COLSPEC0" colwidth="1*">

<colspec colname="COLSPEC1" colwidth="1*">

<thead>

<row><entry align="center" valign="middle">ATTRIBUTE TYPE</entry><entry align="center"

valign="middle">ATTRIBUTE VALUE</entry></row>

</thead>

<tbody>

<row><entry><para>Availability</para></entry><entry><para>image/library/libtiff</para></entry>

</row>

<row><entry colname="COLSPEC0"><para>Interface stability</para></entry><entry

colname="COLSPEC1"><para>Uncommitted</para></entry></row>

</tbody>

</tgroup>

</informaltable>

</refsect1>

<refsect1 id="TIFFswab-3tiff-also"><title>&also-tt;</title>

<para><citerefentry><refentrytitle>libtiff</refentrytitle><manvolnum>3</manvolnum>

</citerefentry></para>

</refsect1>

<refsect1 id="TIFFswab-3tiff-note"><title>&note-tt;</title>

<para>This man page was originally written by Sam Leffler. Updated by Breda

McColgan, Sun Microsystems Inc., 2004.</para>

</refsect1>

</refentry>

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