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<hr size="2">
<a name="uniwbrk_002eh"></a>
<a name="SEC38"></a>
<h1 class="chapter"> <a href="libunistring.html#TOC38">10. Word breaks in strings <code>&lt;uniwbrk.h&gt;</code></a> </h1>

<p>This include file declares functions for determining where in a string
&ldquo;words&rdquo; start and end.  Here &ldquo;words&rdquo; are not necessarily the same as
entities that can be looked up in dictionaries, but rather groups of
consecutive characters that should not be split by text processing
operations.
</p>

<hr size="6">
<a name="Word-breaks-in-a-string"></a>
<a name="SEC39"></a>
<h2 class="section"> <a href="libunistring.html#TOC39">10.1 Word breaks in a string</a> </h2>

<p>The following functions determine the word breaks in a string.
</p>
<dl>
<dt><u>Function:</u> void <b>u8_wordbreaks</b><i> (const uint8_t *<var>s</var>, size_t <var>n</var>, char *<var>p</var>)</i>
<a name="IDX615"></a>
</dt>
<dt><u>Function:</u> void <b>u16_wordbreaks</b><i> (const uint16_t *<var>s</var>, size_t <var>n</var>, char *<var>p</var>)</i>
<a name="IDX616"></a>
</dt>
<dt><u>Function:</u> void <b>u32_wordbreaks</b><i> (const uint32_t *<var>s</var>, size_t <var>n</var>, char *<var>p</var>)</i>
<a name="IDX617"></a>
</dt>
<dt><u>Function:</u> void <b>ulc_wordbreaks</b><i> (const char *<var>s</var>, size_t <var>n</var>, char *<var>p</var>)</i>
<a name="IDX618"></a>
</dt>
<dd><p>Determines the word break points in <var>s</var>, an array of <var>n</var> units, and
stores the result at <code><var>p</var>[0..<var>n</var>-1]</code>.
</p><dl compact="compact">
<dt> <code><var>p</var>[i] = 1</code></dt>
<dd><p>means that there is a word boundary between <code><var>s</var>[i-1]</code> and
<code><var>s</var>[i]</code>.
</p></dd>
<dt> <code><var>p</var>[i] = 0</code></dt>
<dd><p>means that <code><var>s</var>[i-1]</code> and <code><var>s</var>[i]</code> must not be separated.
</p></dd>
</dl>
<p><code><var>p</var>[0]</code> is always set to 0.  If an application wants to consider a
word break to be present at the beginning of the string (before
<code><var>s</var>[0]</code>) or at the end of the string (after
<code><var>s</var>[0..<var>n</var>-1]</code>), it has to treat these cases explicitly.
</p></dd></dl>

<hr size="6">
<a name="Word-break-property"></a>
<a name="SEC40"></a>
<h2 class="section"> <a href="libunistring.html#TOC40">10.2 Word break property</a> </h2>

<p>This is a more low-level API.  The word break property is a property defined
in Unicode Standard Annex #29, section &ldquo;Word Boundaries&rdquo;, see
<a href="http://www.unicode.org/reports/tr29/#Word_Boundaries">http://www.unicode.org/reports/tr29/#Word_Boundaries</a>.  It is
used for determining the word breaks in a string.
</p>
<p>The following are the possible values of the word break property.  More values
may be added in the future.
</p>
<dl>
<dt><u>Constant:</u> int <b>WBP_OTHER</b>
<a name="IDX619"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_CR</b>
<a name="IDX620"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_LF</b>
<a name="IDX621"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_NEWLINE</b>
<a name="IDX622"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_EXTEND</b>
<a name="IDX623"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_FORMAT</b>
<a name="IDX624"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_KATAKANA</b>
<a name="IDX625"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_ALETTER</b>
<a name="IDX626"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_MIDNUMLET</b>
<a name="IDX627"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_MIDLETTER</b>
<a name="IDX628"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_MIDNUM</b>
<a name="IDX629"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_NUMERIC</b>
<a name="IDX630"></a>
</dt>
<dt><u>Constant:</u> int <b>WBP_EXTENDNUMLET</b>
<a name="IDX631"></a>
</dt>
</dl>

<p>The following function looks up the word break property of a character.
</p>
<dl>
<dt><u>Function:</u> int <b>uc_wordbreak_property</b><i> (ucs4_t <var>uc</var>)</i>
<a name="IDX632"></a>
</dt>
<dd><p>Returns the Word_Break property of a Unicode character.
</p></dd></dl>
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