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<a href="#redland-unicode.description" class="shortcut">Description</a>
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<h2><span class="refentrytitle"><a name="redland-unicode.top_of_page"></a>Unicode</span></h2>
<p>Unicode — Unicode utility functions.</p>
</td>
<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="redland-unicode.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">typedef <a class="link" href="redland-unicode.html#librdf-unichar" title="librdf_unichar">librdf_unichar</a>;
<span class="returnvalue">int</span> <a class="link" href="redland-unicode.html#librdf-unicode-char-to-utf8" title="librdf_unicode_char_to_utf8 ()">librdf_unicode_char_to_utf8</a> (<em class="parameter"><code><a class="link" href="redland-unicode.html#librdf-unichar" title="librdf_unichar"><span class="type">librdf_unichar</span></a> c</code></em>,
<em class="parameter"><code>unsigned <span class="type">char</span> *output</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>);
<span class="returnvalue">int</span> <a class="link" href="redland-unicode.html#librdf-utf8-to-unicode-char" title="librdf_utf8_to_unicode_char ()">librdf_utf8_to_unicode_char</a> (<em class="parameter"><code><a class="link" href="redland-unicode.html#librdf-unichar" title="librdf_unichar"><span class="type">librdf_unichar</span></a> *output</code></em>,
<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>);
unsigned <span class="returnvalue">char</span> * <a class="link" href="redland-unicode.html#librdf-utf8-to-latin1" title="librdf_utf8_to_latin1 ()">librdf_utf8_to_latin1</a> (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>,
<em class="parameter"><code><span class="type">int</span> *output_length</code></em>);
unsigned <span class="returnvalue">char</span> * <a class="link" href="redland-unicode.html#librdf-utf8-to-latin1-2" title="librdf_utf8_to_latin1_2 ()">librdf_utf8_to_latin1_2</a> (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">size_t</span> length</code></em>,
<em class="parameter"><code>unsigned <span class="type">char</span> discard</code></em>,
<em class="parameter"><code><span class="type">size_t</span> *output_length</code></em>);
unsigned <span class="returnvalue">char</span> * <a class="link" href="redland-unicode.html#librdf-latin1-to-utf8" title="librdf_latin1_to_utf8 ()">librdf_latin1_to_utf8</a> (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>,
<em class="parameter"><code><span class="type">int</span> *output_length</code></em>);
unsigned <span class="returnvalue">char</span> * <a class="link" href="redland-unicode.html#librdf-latin1-to-utf8-2" title="librdf_latin1_to_utf8_2 ()">librdf_latin1_to_utf8_2</a> (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">size_t</span> length</code></em>,
<em class="parameter"><code><span class="type">size_t</span> *output_length</code></em>);
<span class="returnvalue">void</span> <a class="link" href="redland-unicode.html#librdf-utf8-print" title="librdf_utf8_print ()">librdf_utf8_print</a> (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>,
<em class="parameter"><code><span class="type">FILE</span> *stream</code></em>);
</pre>
</div>
<div class="refsect1">
<a name="redland-unicode.description"></a><h2>Description</h2>
<p>
Utility functions to convert between UTF-8, full Unicode and Latin-1.
Redland uses UTF-8 for all string formats (except where noted) but
these may need to be converted to other Unicode encodings or downgraded
with loss to Latin-1.
</p>
</div>
<div class="refsect1">
<a name="redland-unicode.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="librdf-unichar"></a><h3>librdf_unichar</h3>
<pre class="programlisting">typedef raptor_unichar librdf_unichar;
</pre>
<p>
Unicode codepoint.
</p>
</div>
<hr>
<div class="refsect2">
<a name="librdf-unicode-char-to-utf8"></a><h3>librdf_unicode_char_to_utf8 ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> librdf_unicode_char_to_utf8 (<em class="parameter"><code><a class="link" href="redland-unicode.html#librdf-unichar" title="librdf_unichar"><span class="type">librdf_unichar</span></a> c</code></em>,
<em class="parameter"><code>unsigned <span class="type">char</span> *output</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>);</pre>
<p>
Convert a Unicode character to UTF-8 encoding.
</p>
<p>
<em class="parameter"><code>deprecated</code></em>: Use <code class="function">raptor_unicode_utf8_string_put_char()</code> noting that
the length argument is a size_t.
</p>
<p>
If buffer is NULL, then will calculate the length rather than
perform it. This can be used by the caller to allocate space
and then re-call this function with the new buffer.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>c</code></em> :</span></p></td>
<td>Unicode character</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>output</code></em> :</span></p></td>
<td>UTF-8 string buffer or NULL</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>buffer size (will be truncated to size_t)</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>bytes written to output buffer or <0 on failure</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="librdf-utf8-to-unicode-char"></a><h3>librdf_utf8_to_unicode_char ()</h3>
<pre class="programlisting"><span class="returnvalue">int</span> librdf_utf8_to_unicode_char (<em class="parameter"><code><a class="link" href="redland-unicode.html#librdf-unichar" title="librdf_unichar"><span class="type">librdf_unichar</span></a> *output</code></em>,
<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>);</pre>
<p>
Convert an UTF-8 encoded buffer to a Unicode character.
</p>
<p>
<em class="parameter"><code>deprecated</code></em>: Use <code class="function">raptor_unicode_utf8_string_get_char()</code> noting that
the arg order has changed to input, length (a size_t), output.
</p>
<p>
If <em class="parameter"><code>output</code></em> is NULL, then will calculate the number of bytes that
will be used from the input buffer and not perform the conversion.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>output</code></em> :</span></p></td>
<td>Pointer to the Unicode character or NULL</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>input</code></em> :</span></p></td>
<td>UTF-8 string buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>buffer size (will be truncated to size_t)</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>bytes used from input buffer or <0 on failure</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="librdf-utf8-to-latin1"></a><h3>librdf_utf8_to_latin1 ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">char</span> * librdf_utf8_to_latin1 (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>,
<em class="parameter"><code><span class="type">int</span> *output_length</code></em>);</pre>
<p>
Convert a UTF-8 string to ISO Latin-1.
</p>
<p>
Converts the given UTF-8 string to the ISO Latin-1 subset of
Unicode (characters 0x00-0xff), discarding any out of range
characters.
</p>
<p>
<em class="parameter"><code>deprecated</code></em> for <a class="link" href="redland-unicode.html#librdf-utf8-to-latin1-2" title="librdf_utf8_to_latin1_2 ()"><code class="function">librdf_utf8_to_latin1_2()</code></a> that takes and returns
size_t sizes and allows replacing of out of range characters.
</p>
<p>
If <em class="parameter"><code>output_length</code></em> is not NULL, the returned string length
will be stored there.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>input</code></em> :</span></p></td>
<td>UTF-8 string buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>buffer size (will be truncated to size_t)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>output_length</code></em> :</span></p></td>
<td>Pointer to variable to store resulting string length or NULL</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>pointer to new ISO Latin-1 string or NULL on failure</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="librdf-utf8-to-latin1-2"></a><h3>librdf_utf8_to_latin1_2 ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">char</span> * librdf_utf8_to_latin1_2 (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">size_t</span> length</code></em>,
<em class="parameter"><code>unsigned <span class="type">char</span> discard</code></em>,
<em class="parameter"><code><span class="type">size_t</span> *output_length</code></em>);</pre>
<p>
Convert a UTF-8 string to ISO Latin-1.
</p>
<p>
Converts the given UTF-8 string to the ISO Latin-1 subset of
Unicode (characters 0x00-0xff). Out of range characters are
replaced with <em class="parameter"><code>discard</code></em> unless it is NUL (\0).
</p>
<p>
If <em class="parameter"><code>output_length</code></em> is not NULL, the returned string length will be
stored there.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>input</code></em> :</span></p></td>
<td>UTF-8 string buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>buffer size</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>discard</code></em> :</span></p></td>
<td>character to use to replace out of range characters or NUL (\0) to discard</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>output_length</code></em> :</span></p></td>
<td>Pointer to variable to store resulting string length or NULL</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>pointer to new ISO Latin-1 string or NULL on failure</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="librdf-latin1-to-utf8"></a><h3>librdf_latin1_to_utf8 ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">char</span> * librdf_latin1_to_utf8 (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>,
<em class="parameter"><code><span class="type">int</span> *output_length</code></em>);</pre>
<p>
Convert an ISO Latin-1 encoded string to UTF-8.
</p>
<p>
Converts the given ISO Latin-1 string to an UTF-8 encoded string
representing the same content. This is lossless.
</p>
<p>
<em class="parameter"><code>deprecated</code></em> for <a class="link" href="redland-unicode.html#librdf-latin1-to-utf8-2" title="librdf_latin1_to_utf8_2 ()"><code class="function">librdf_latin1_to_utf8_2()</code></a> that takes and returns
size_t sizes.
</p>
<p>
If <em class="parameter"><code>output_length</code></em> is not NULL, the returned string length will be
stored there.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>input</code></em> :</span></p></td>
<td>ISO Latin-1 string buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>buffer size (will be truncated to size_t)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>output_length</code></em> :</span></p></td>
<td>Pointer to variable to store resulting string length or NULL</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>pointer to new UTF-8 string or NULL on failure</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="librdf-latin1-to-utf8-2"></a><h3>librdf_latin1_to_utf8_2 ()</h3>
<pre class="programlisting">unsigned <span class="returnvalue">char</span> * librdf_latin1_to_utf8_2 (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">size_t</span> length</code></em>,
<em class="parameter"><code><span class="type">size_t</span> *output_length</code></em>);</pre>
<p>
Convert an ISO Latin-1 encoded string to UTF-8.
</p>
<p>
Converts the given ISO Latin-1 string to an UTF-8 encoded string
representing the same content. This is lossless.
</p>
<p>
If <em class="parameter"><code>output_length</code></em> is not NULL, the returned string length will be
stored there.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>input</code></em> :</span></p></td>
<td>ISO Latin-1 string buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>buffer size</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>output_length</code></em> :</span></p></td>
<td>Pointer to variable to store resulting string length or NULL</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>pointer to new UTF-8 string or NULL on failure</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="librdf-utf8-print"></a><h3>librdf_utf8_print ()</h3>
<pre class="programlisting"><span class="returnvalue">void</span> librdf_utf8_print (<em class="parameter"><code>const unsigned <span class="type">char</span> *input</code></em>,
<em class="parameter"><code><span class="type">int</span> length</code></em>,
<em class="parameter"><code><span class="type">FILE</span> *stream</code></em>);</pre>
<p>
Print a UTF-8 string to a stream.
</p>
<p>
Pretty prints the UTF-8 string in a pseudo-C character
format like \u<span class="emphasis"><em>hex digits</em></span> when the characters fail
the <code class="function">isprint()</code> test.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>input</code></em> :</span></p></td>
<td>UTF-8 string buffer</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>length</code></em> :</span></p></td>
<td>buffer size (will be truncated to size_t)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>stream</code></em> :</span></p></td>
<td>FILE* stream</td>
</tr>
</tbody>
</table></div>
</div>
</div>
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