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Initial import of the CDE 2.1.30 sources from the Open Group.

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Peter Howkins
2012-03-10 18:21:40 +00:00
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cde/doc/C/guides/man/m3_Dt/SrchHigh.sgm Normal file
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<!-- $XConsortium: dtsrhili.sgm 1996 -->
<!-- (c) Copyright 1995 Digital Equipment Corporation. -->
<!-- (c) Copyright 1995 Hewlett-Packard Company. -->
<!-- (c) Copyright 1995 International Business Machines Corp. -->
<!-- (c) Copyright 1995 Sun Microsystems, Inc. -->
<!-- (c) Copyright 1995 Novell, Inc. -->
<!-- (c) Copyright 1995 FUJITSU LIMITED. -->
<!-- (c) Copyright 1995 Hitachi. -->
<![ %CDE.C.CDE; [<refentry id="CDE.SEARCH.DtSearchHighlight">]]>
<refmeta><refentrytitle>DtSearchHighlight</refentrytitle>
<manvolnum>library call</manvolnum></refmeta>
<refnamediv>
<refname><function>DtSearchHighlight</function></refname>
<refpurpose>Generate DtSrHitwords table for highlighting DtSearch document</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include &lt;Dt/Search.h></funcsynopsisinfo>
<funcdef>int<function>DtSearchHighlight</function></funcdef>
<paramdef>char <parameter>*dbname</parameter></paramdef>
<paramdef>char <parameter>*cleartext</parameter></paramdef>
<paramdef>DtSrHitword <parameter>**hitwptr</parameter></paramdef>
<paramdef>long <parameter>*hitwcount</parameter></paramdef>
<paramdef>int <parameter>search_type</parameter></paramdef>
<paramdef>char <parameter>*stems</parameter></paramdef>
<paramdef>int <parameter>stemcount</parameter></paramdef>
</funcsynopsis></refsynopsisdiv>
<refsect1>
<title>DESCRIPTION</title>
<para>The <function>DtSearchHighlight</function> function generates an array
of offsets and lengths (DtSrHitword) of parsed linguistic terms (stems) in
the passed document cleartext to enable a browser to highlight the words in
the text as appropriate for its user interface.
</para>
</refsect1>
<refsect1>
<title>ARGUMENTS</title>
<variablelist>
<varlistentry><term><symbol role="Variable">dbname</symbol></term>
<listitem>
<para>Specifies which database is to be searched. It is any one of the database
name strings returned from <function>DtSearchInit</function> or <function>DtSearchReinit</function>. If <symbol role="Variable">dbname</symbol> is NULL,
the first database name string is used.
</para>
</listitem>
</varlistentry>
<varlistentry><term><symbol role="Variable">cleartext</symbol></term>
<listitem>
<para>Pointer to a zero terminated C string containing the document text to be
highlighted. Usually, but not necessarily, this value is returned from
<function>DtSearchRetrieve</function>.
</para>
</listitem>
</varlistentry>
<varlistentry><term><symbol role="Variable">hitwptr</symbol> and <symbol role="Variable">hitwcount</symbol></term>
<listitem>
<para>The hitwords array will be stored in <symbol role="Variable">hitwptr</symbol>,
the address of a DtSrHitword pointer. The array is dynamically
allocated by this function and remains valid until the next call to this function.
The size of the hitwords array will be stored in <symbol role="Variable">hitwcount</symbol>.</para>
</listitem>
</varlistentry>
<varlistentry><term><symbol role="Variable">search_type</symbol></term>
<listitem>
<para>Specifies the <symbol role="Variable">search_type</symbol> of the
<function>DtSearchQuery</function> that generated the
<symbol role="Variable">stems</symbol> array. It must be zero, 'P', 'W', or 'S'.
If zero is passed, the <symbol role="Variable">search_type</symbol> of
the last call to <function>DtSearchQuery</function> is assumed.
</para>
</listitem>
</varlistentry>
<varlistentry><term><symbol role="Variable">stems</symbol> and <symbol role="Variable">stemcount</symbol></term>
<listitem>
<para><symbol role="Variable">stems</symbol> and <symbol role="Variable">stemcount</symbol>
are optional; they can be NULL and
zero respectively. However, if either is specified, both must be
specified. If specified, they refer to the <symbol role="Variable">stems</symbol>
array that was returned from the previous
call to <function>DtSearchQuery</function> that ultimately resulted in
the <symbol role="Variable">cleartext</symbol> argument.
</para>
<para>If these arguments are not passed, the <symbol role="Variable">stems</symbol>
array from the most recent call to
<function>DtSearchQuery</function> is assumed.
</para>
</listitem>
</varlistentry>
</variablelist>
</refsect1>
<refsect1>
<title>RETURN VALUE</title>
<para>This function returns <systemitem class="Constant">DtSrOK</systemitem>,
as well as a DtSrHitword table, when the table generation is completely
successful.
</para>
<para>Any other return code signifies failure and user messages on the MessageList
explain why.</para>
<para>Any API function can also return
<systemitem class="Constant">DtSrREINIT</systemitem> and
the return codes for fatal engine errors at any time.
</para>
</refsect1>
<refsect1>
<title>SEE ALSO</title>
<para>&cdeman.DtSrAPI;,
&cdeman.DtSearchQuery;,
&cdeman.DtSearchRetrieve;</para>
</refsect1></refentry>