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<refentry id="raptor-section-unicode">
<refmeta>
<refentrytitle role="top_of_page">Unicode</refentrytitle>
<manvolnum>3</manvolnum>
<refmiscinfo>RAPTOR Library</refmiscinfo>
</refmeta>

<refnamediv>
<refname>Unicode</refname>
<refpurpose>Unicode and UTF-8 utility functions.</refpurpose>
<!--[<xref linkend="desc" endterm="desc.title"/>]-->
</refnamediv>

<refsynopsisdiv role="synopsis">
<title role="synopsis.title">Synopsis</title>

<synopsis>



<link linkend="int">int</link>         <link linkend="raptor-unicode-char-to-utf8">raptor_unicode_char_to_utf8</link>     (long <link linkend="c">c</link> ,
                                             unsigned <link linkend="char">char</link> *output);
<link linkend="int">int</link>         <link linkend="raptor-utf8-to-unicode-char">raptor_utf8_to_unicode_char</link>     (unsigned <link linkend="long">long</link> *output,
                                             unsigned <link linkend="char">char</link> *input,
                                             <link linkend="int">int</link> length);
<link linkend="int">int</link>         <link linkend="raptor-unicode-is-xml11-namestartchar">raptor_unicode_is_xml11_namestartchar</link>
                                            (long <link linkend="c">c</link> );
<link linkend="int">int</link>         <link linkend="raptor-unicode-is-xml10-namestartchar">raptor_unicode_is_xml10_namestartchar</link>
                                            (long <link linkend="c">c</link> );
<link linkend="int">int</link>         <link linkend="raptor-unicode-is-xml11-namechar">raptor_unicode_is_xml11_namechar</link>
                                            (long <link linkend="c">c</link> );
<link linkend="int">int</link>         <link linkend="raptor-unicode-is-xml10-namechar">raptor_unicode_is_xml10_namechar</link>
                                            (long <link linkend="c">c</link> );
<link linkend="int">int</link>         <link linkend="raptor-utf8-check">raptor_utf8_check</link>               (unsigned <link linkend="char">char</link> *string,
                                             <link linkend="size-t">size_t</link> length);
</synopsis>
</refsynopsisdiv>









<refsect1 role="desc">
<title role="desc.title">Description</title>
<para>
Functions to support converting to and from Unicode written in UTF-8
which is the native internal string format of all the redland libraries.
Includes checking for Unicode names using either the XML 1.0 or XML 1.1
rules.
</para>
</refsect1>

<refsect1 role="details">
<title role="details.title">Details</title>
<refsect2>
<title><anchor id="raptor-unicode-char-to-utf8" role="function"/>raptor_unicode_char_to_utf8 ()</title>
<indexterm><primary>raptor_unicode_char_to_utf8</primary></indexterm><programlisting><link linkend="int">int</link>         raptor_unicode_char_to_utf8     (long <link linkend="c">c</link> ,
                                             unsigned <link linkend="char">char</link> *output);</programlisting>
<para>
Convert a Unicode character to UTF-8 encoding.
</para>
<para>
Based on <link linkend="librdf-unicode-char-to-utf8"><function>librdf_unicode_char_to_utf8()</function></link> with no need to calculate
length since the encoded character is always copied into a buffer
with sufficient size.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>Param1</parameter>&nbsp;:</term>
<listitem><simpara>
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>output</parameter>&nbsp;:</term>
<listitem><simpara> UTF-8 string buffer or NULL
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> bytes encoded to output buffer or &lt;0 on failure
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="raptor-utf8-to-unicode-char" role="function"/>raptor_utf8_to_unicode_char ()</title>
<indexterm><primary>raptor_utf8_to_unicode_char</primary></indexterm><programlisting><link linkend="int">int</link>         raptor_utf8_to_unicode_char     (unsigned <link linkend="long">long</link> *output,
                                             unsigned <link linkend="char">char</link> *input,
                                             <link linkend="int">int</link> length);</programlisting>
<para>
Convert an UTF-8 encoded buffer to a Unicode character.
</para>
<para>
If output is NULL, then will calculate the number of bytes that
will be used from the input buffer and not perform the conversion.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>output</parameter>&nbsp;:</term>
<listitem><simpara> Pointer to the Unicode character or NULL
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>input</parameter>&nbsp;:</term>
<listitem><simpara> UTF-8 string buffer
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>length</parameter>&nbsp;:</term>
<listitem><simpara> buffer size
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> bytes used from input buffer or &lt;0 on failure: -1 input buffer too short or length error, -2 overlong UTF-8 sequence, -3 illegal code positions, -4 code out of range U+0000 to U+10FFFF.  In cases -2, -3 and -4 the coded character is stored in the output.
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="raptor-unicode-is-xml11-namestartchar" role="function"/>raptor_unicode_is_xml11_namestartchar ()</title>
<indexterm><primary>raptor_unicode_is_xml11_namestartchar</primary></indexterm><programlisting><link linkend="int">int</link>         raptor_unicode_is_xml11_namestartchar
                                            (long <link linkend="c">c</link> );</programlisting>
<para>
Check if Unicode character is legal to start an XML 1.1 Name
</para>
<para>
Namespaces in XML 1.1 REC 2004-02-04
  http://www.w3.org/TR/2004/REC-xml11-20040204/<link linkend="NT-NameStartChar"><type>NT-NameStartChar</type></link>
updating
  Extensible Markup Language (XML) 1.1 REC 2004-02-04
  http://www.w3.org/TR/2004/REC-xml11-20040204/ sec 2.3, [4a]
excluding the ':'</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>Param1</parameter>&nbsp;:</term>
<listitem><simpara>
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> non-0 if legal
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="raptor-unicode-is-xml10-namestartchar" role="function"/>raptor_unicode_is_xml10_namestartchar ()</title>
<indexterm><primary>raptor_unicode_is_xml10_namestartchar</primary></indexterm><programlisting><link linkend="int">int</link>         raptor_unicode_is_xml10_namestartchar
                                            (long <link linkend="c">c</link> );</programlisting>
<para>
Check if Unicode character is legal to start an XML 1.0 Name
</para>
<para>
Namespaces in XML REC 1999-01-14
  http://www.w3.org/TR/1999/REC-xml-names-19990114/<link linkend="NT-NCName"><type>NT-NCName</type></link>
updating
  Extensible Markup Language (XML) 1.0 (Third Edition) REC 2004-02-04
  http://www.w3.org/TR/2004/REC-xml-20040204/
excluding the ':'</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>Param1</parameter>&nbsp;:</term>
<listitem><simpara>
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> non-0 if legal
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="raptor-unicode-is-xml11-namechar" role="function"/>raptor_unicode_is_xml11_namechar ()</title>
<indexterm><primary>raptor_unicode_is_xml11_namechar</primary></indexterm><programlisting><link linkend="int">int</link>         raptor_unicode_is_xml11_namechar
                                            (long <link linkend="c">c</link> );</programlisting>
<para>
Check if a Unicode codepoint is a legal to continue an XML 1.1 Name
</para>
<para>
Namespaces in XML 1.1 REC 2004-02-04
  http://www.w3.org/TR/2004/REC-xml11-20040204/
updating
  Extensible Markup Language (XML) 1.1 REC 2004-02-04
  http://www.w3.org/TR/2004/REC-xml11-20040204/ sec 2.3, [4a]
excluding the ':'</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>Param1</parameter>&nbsp;:</term>
<listitem><simpara>
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> non-0 if legal
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="raptor-unicode-is-xml10-namechar" role="function"/>raptor_unicode_is_xml10_namechar ()</title>
<indexterm><primary>raptor_unicode_is_xml10_namechar</primary></indexterm><programlisting><link linkend="int">int</link>         raptor_unicode_is_xml10_namechar
                                            (long <link linkend="c">c</link> );</programlisting>
<para>
Check if a Unicode codepoint is a legal to continue an XML 1.0 Name
</para>
<para>
Namespaces in XML REC 1999-01-14
  http://www.w3.org/TR/1999/REC-xml-names-19990114/<link linkend="NT-NCNameChar"><type>NT-NCNameChar</type></link>
updating
  Extensible Markup Language (XML) 1.0 (Third Edition) REC 2004-02-04
  http://www.w3.org/TR/2004/REC-xml-20040204/
excluding the ':'</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>Param1</parameter>&nbsp;:</term>
<listitem><simpara>
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> non-0 if legal
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="raptor-utf8-check" role="function"/>raptor_utf8_check ()</title>
<indexterm><primary>raptor_utf8_check</primary></indexterm><programlisting><link linkend="int">int</link>         raptor_utf8_check               (unsigned <link linkend="char">char</link> *string,
                                             <link linkend="size-t">size_t</link> length);</programlisting>
<para>
Check a string is UTF-8.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>string</parameter>&nbsp;:</term>
<listitem><simpara> UTF-8 string
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>length</parameter>&nbsp;:</term>
<listitem><simpara> length of string
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> Non 0 if the string is UTF-8
</simpara></listitem></varlistentry>
</variablelist></refsect2>

</refsect1>




</refentry>