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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<title>liblinebreak: linebreak.h File Reference</title>
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<h1>linebreak.h File Reference</h1>Header file for the line breaking algorithm. <a href="#_details">More...</a>
<p>
<code>#include <stddef.h></code><br>
<p>
Include dependency graph for linebreak.h:<p><center><img src="linebreak_8h__incl.png" border="0" usemap="#linebreak.h_map" alt=""></center>
<map name="linebreak.h_map">
<area shape="rect" title="Header file for the line breaking algorithm." alt="" coords="145,5,215,32"></map>
<p>
This graph shows which files directly or indirectly include this file:<p><center><img src="linebreak_8h__dep__incl.png" border="0" usemap="#linebreak.hdep_map" alt=""></center>
<map name="linebreak.hdep_map">
<area shape="rect" href="linebreak_8c.html" title="Header file for the line breaking algorithm." alt="" coords="157,6,245,32"><area shape="rect" href="linebreakdata_8c.html" title="Header file for the line breaking algorithm." alt="" coords="144,56,259,83"><area shape="rect" href="linebreakdef_8c.html" title="Header file for the line breaking algorithm." alt="" coords="148,107,255,134"></map>
<p>
<a href="linebreak_8h-source.html">Go to the source code of this file.</a><table border="0" cellpadding="0" cellspacing="0">
<tr><td></td></tr>
<tr><td colspan="2"><br><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#83634cb3df4ba09faf22ba687ffc4c02">LINEBREAK_VERSION</a> 0x0201</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Version of the library linebreak. <a href="#83634cb3df4ba09faf22ba687ffc4c02"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#367d64258fd90864a467687cd1736b77">LINEBREAK_MUSTBREAK</a> 0</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Break is mandatory. <a href="#367d64258fd90864a467687cd1736b77"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#229f34b0b72ccb2e53d0936a1e61a363">LINEBREAK_ALLOWBREAK</a> 1</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Break is allowed. <a href="#229f34b0b72ccb2e53d0936a1e61a363"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#dd176a107633817050bedf6eb4f491cc">LINEBREAK_NOBREAK</a> 2</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">No break is possible. <a href="#dd176a107633817050bedf6eb4f491cc"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#5adf3d4831b89cb3e40e9bd31a73a39d">LINEBREAK_INSIDEACHAR</a> 3</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">A UTF-8/16 sequence is unfinished. <a href="#5adf3d4831b89cb3e40e9bd31a73a39d"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Typedefs</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef unsigned char </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#6103b2105588f239c593e779e605038a">utf8_t</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Type for UTF-8 data points. <a href="#6103b2105588f239c593e779e605038a"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef unsigned short </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#4dce96cad338d9281612277b2d80950c">utf16_t</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Type for UTF-16 data points. <a href="#4dce96cad338d9281612277b2d80950c"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">typedef unsigned int </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#4f775bae0642c213be2c526018283c25">utf32_t</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Type for UTF-32 data points. <a href="#4f775bae0642c213be2c526018283c25"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#57c2b88b7e1277cbba23cfffbc782c4f">init_linebreak</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Initializes the second-level index to the line breaking properties. <a href="#57c2b88b7e1277cbba23cfffbc782c4f"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#b426e9cf68117faf583a0ed54742cb28">set_linebreaks_utf8</a> (const <a class="el" href="linebreak_8h.html#6103b2105588f239c593e779e605038a">utf8_t</a> *s, size_t len, const char *lang, char *brks)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Sets the line breaking information for a UTF-8 input string. <a href="#b426e9cf68117faf583a0ed54742cb28"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#1d56bce2d32cd986052172638cec43c8">set_linebreaks_utf16</a> (const <a class="el" href="linebreak_8h.html#4dce96cad338d9281612277b2d80950c">utf16_t</a> *s, size_t len, const char *lang, char *brks)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Sets the line breaking information for a UTF-16 input string. <a href="#1d56bce2d32cd986052172638cec43c8"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#9fdce33b4ded9d586888c16228ae9e1f">set_linebreaks_utf32</a> (const <a class="el" href="linebreak_8h.html#4f775bae0642c213be2c526018283c25">utf32_t</a> *s, size_t len, const char *lang, char *brks)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Sets the line breaking information for a UTF-32 input string. <a href="#9fdce33b4ded9d586888c16228ae9e1f"></a><br></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#5761f60559b5ddb61bb095f00c7deb5c">is_line_breakable</a> (<a class="el" href="linebreak_8h.html#4f775bae0642c213be2c526018283c25">utf32_t</a> char1, <a class="el" href="linebreak_8h.html#4f775bae0642c213be2c526018283c25">utf32_t</a> char2, const char *lang)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Tells whether a line break can occur between two Unicode characters. <a href="#5761f60559b5ddb61bb095f00c7deb5c"></a><br></td></tr>
<tr><td colspan="2"><br><h2>Variables</h2></td></tr>
<tr><td class="memItemLeft" nowrap align="right" valign="top">const int </td><td class="memItemRight" valign="bottom"><a class="el" href="linebreak_8h.html#0ac90a75aa79415fe87e66b95d8fd09b">linebreak_version</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Version number of the library. <a href="#0ac90a75aa79415fe87e66b95d8fd09b"></a><br></td></tr>
</table>
<hr><a name="_details"></a><h2>Detailed Description</h2>
Header file for the line breaking algorithm.
<p>
<dl class="version" compact><dt><b>Version:</b></dt><dd>2.1, 2011/05/07 </dd></dl>
<dl class="author" compact><dt><b>Author:</b></dt><dd>Wu Yongwei </dd></dl>
<hr><h2>Define Documentation</h2>
<a class="anchor" name="229f34b0b72ccb2e53d0936a1e61a363"></a><!-- doxytag: member="linebreak.h::LINEBREAK_ALLOWBREAK" ref="229f34b0b72ccb2e53d0936a1e61a363" args="" -->
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<td class="memname">#define LINEBREAK_ALLOWBREAK 1 </td>
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<div class="memdoc">
<p>
Break is allowed.
<p>
</div>
</div><p>
<a class="anchor" name="5adf3d4831b89cb3e40e9bd31a73a39d"></a><!-- doxytag: member="linebreak.h::LINEBREAK_INSIDEACHAR" ref="5adf3d4831b89cb3e40e9bd31a73a39d" args="" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">#define LINEBREAK_INSIDEACHAR 3 </td>
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<div class="memdoc">
<p>
A UTF-8/16 sequence is unfinished.
<p>
</div>
</div><p>
<a class="anchor" name="367d64258fd90864a467687cd1736b77"></a><!-- doxytag: member="linebreak.h::LINEBREAK_MUSTBREAK" ref="367d64258fd90864a467687cd1736b77" args="" -->
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<div class="memproto">
<table class="memname">
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<td class="memname">#define LINEBREAK_MUSTBREAK 0 </td>
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<div class="memdoc">
<p>
Break is mandatory.
<p>
</div>
</div><p>
<a class="anchor" name="dd176a107633817050bedf6eb4f491cc"></a><!-- doxytag: member="linebreak.h::LINEBREAK_NOBREAK" ref="dd176a107633817050bedf6eb4f491cc" args="" -->
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<td class="memname">#define LINEBREAK_NOBREAK 2 </td>
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<div class="memdoc">
<p>
No break is possible.
<p>
</div>
</div><p>
<a class="anchor" name="83634cb3df4ba09faf22ba687ffc4c02"></a><!-- doxytag: member="linebreak.h::LINEBREAK_VERSION" ref="83634cb3df4ba09faf22ba687ffc4c02" args="" -->
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<td class="memname">#define LINEBREAK_VERSION 0x0201 </td>
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<div class="memdoc">
<p>
Version of the library linebreak.
<p>
</div>
</div><p>
<hr><h2>Typedef Documentation</h2>
<a class="anchor" name="4dce96cad338d9281612277b2d80950c"></a><!-- doxytag: member="linebreak.h::utf16_t" ref="4dce96cad338d9281612277b2d80950c" args="" -->
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<td class="memname">typedef unsigned short <a class="el" href="linebreak_8h.html#4dce96cad338d9281612277b2d80950c">utf16_t</a> </td>
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<div class="memdoc">
<p>
Type for UTF-16 data points.
<p>
</div>
</div><p>
<a class="anchor" name="4f775bae0642c213be2c526018283c25"></a><!-- doxytag: member="linebreak.h::utf32_t" ref="4f775bae0642c213be2c526018283c25" args="" -->
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<td class="memname">typedef unsigned int <a class="el" href="linebreak_8h.html#4f775bae0642c213be2c526018283c25">utf32_t</a> </td>
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<div class="memdoc">
<p>
Type for UTF-32 data points.
<p>
</div>
</div><p>
<a class="anchor" name="6103b2105588f239c593e779e605038a"></a><!-- doxytag: member="linebreak.h::utf8_t" ref="6103b2105588f239c593e779e605038a" args="" -->
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<td class="memname">typedef unsigned char <a class="el" href="linebreak_8h.html#6103b2105588f239c593e779e605038a">utf8_t</a> </td>
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<p>
Type for UTF-8 data points.
<p>
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<hr><h2>Function Documentation</h2>
<a class="anchor" name="57c2b88b7e1277cbba23cfffbc782c4f"></a><!-- doxytag: member="linebreak.h::init_linebreak" ref="57c2b88b7e1277cbba23cfffbc782c4f" args="(void)" -->
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<td class="memname">void init_linebreak </td>
<td>(</td>
<td class="paramtype">void </td>
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<td> ) </td>
<td width="100%"></td>
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<p>
Initializes the second-level index to the line breaking properties.
<p>
If it is not called, the performance of <a class="el" href="linebreak_8c.html#41ec5a32a31d007d60ea57caa38a2f3e" title="Gets the line breaking class of a character for a specific language.">get_char_lb_class_lang</a> (and thus the main functionality) can be pretty bad, especially for big code points like those of Chinese.
</div>
</div><p>
<a class="anchor" name="5761f60559b5ddb61bb095f00c7deb5c"></a><!-- doxytag: member="linebreak.h::is_line_breakable" ref="5761f60559b5ddb61bb095f00c7deb5c" args="(utf32_t char1, utf32_t char2, const char *lang)" -->
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<td class="memname">int is_line_breakable </td>
<td>(</td>
<td class="paramtype"><a class="el" href="linebreak_8h.html#4f775bae0642c213be2c526018283c25">utf32_t</a> </td>
<td class="paramname"> <em>char1</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="linebreak_8h.html#4f775bae0642c213be2c526018283c25">utf32_t</a> </td>
<td class="paramname"> <em>char2</em>, </td>
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<td class="paramtype">const char * </td>
<td class="paramname"> <em>lang</em></td><td> </td>
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Tells whether a line break can occur between two Unicode characters.
<p>
This is a wrapper function to expose a simple interface. Generally speaking, it is better to use <a class="el" href="linebreak_8h.html#9fdce33b4ded9d586888c16228ae9e1f" title="Sets the line breaking information for a UTF-32 input string.">set_linebreaks_utf32</a> instead, since complicated cases involving combining marks, spaces, etc. cannot be correctly processed.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>char1</em> </td><td>the first Unicode character </td></tr>
<tr><td valign="top"></td><td valign="top"><em>char2</em> </td><td>the second Unicode character </td></tr>
<tr><td valign="top"></td><td valign="top"><em>lang</em> </td><td>language of the input </td></tr>
</table>
</dl>
<dl class="return" compact><dt><b>Returns:</b></dt><dd>one of <a class="el" href="linebreak_8h.html#367d64258fd90864a467687cd1736b77" title="Break is mandatory.">LINEBREAK_MUSTBREAK</a>, <a class="el" href="linebreak_8h.html#229f34b0b72ccb2e53d0936a1e61a363" title="Break is allowed.">LINEBREAK_ALLOWBREAK</a>, <a class="el" href="linebreak_8h.html#dd176a107633817050bedf6eb4f491cc" title="No break is possible.">LINEBREAK_NOBREAK</a>, or <a class="el" href="linebreak_8h.html#5adf3d4831b89cb3e40e9bd31a73a39d" title="A UTF-8/16 sequence is unfinished.">LINEBREAK_INSIDEACHAR</a> </dd></dl>
</div>
</div><p>
<a class="anchor" name="1d56bce2d32cd986052172638cec43c8"></a><!-- doxytag: member="linebreak.h::set_linebreaks_utf16" ref="1d56bce2d32cd986052172638cec43c8" args="(const utf16_t *s, size_t len, const char *lang, char *brks)" -->
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<td class="memname">void set_linebreaks_utf16 </td>
<td>(</td>
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<td class="paramname"> <em>s</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"> <em>len</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>lang</em>, </td>
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<td class="paramtype">char * </td>
<td class="paramname"> <em>brks</em></td><td> </td>
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<td>)</td>
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Sets the line breaking information for a UTF-16 input string.
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<dl compact><dt><b>Parameters:</b></dt><dd>
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<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>s</em> </td><td>input UTF-16 string </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>len</em> </td><td>length of the input </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>lang</em> </td><td>language of the input </td></tr>
<tr><td valign="top"><tt>[out]</tt> </td><td valign="top"><em>brks</em> </td><td>pointer to the output breaking data, containing <a class="el" href="linebreak_8h.html#367d64258fd90864a467687cd1736b77" title="Break is mandatory.">LINEBREAK_MUSTBREAK</a>, <a class="el" href="linebreak_8h.html#229f34b0b72ccb2e53d0936a1e61a363" title="Break is allowed.">LINEBREAK_ALLOWBREAK</a>, <a class="el" href="linebreak_8h.html#dd176a107633817050bedf6eb4f491cc" title="No break is possible.">LINEBREAK_NOBREAK</a>, or <a class="el" href="linebreak_8h.html#5adf3d4831b89cb3e40e9bd31a73a39d" title="A UTF-8/16 sequence is unfinished.">LINEBREAK_INSIDEACHAR</a> </td></tr>
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<a class="anchor" name="9fdce33b4ded9d586888c16228ae9e1f"></a><!-- doxytag: member="linebreak.h::set_linebreaks_utf32" ref="9fdce33b4ded9d586888c16228ae9e1f" args="(const utf32_t *s, size_t len, const char *lang, char *brks)" -->
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<td class="memname">void set_linebreaks_utf32 </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="linebreak_8h.html#4f775bae0642c213be2c526018283c25">utf32_t</a> * </td>
<td class="paramname"> <em>s</em>, </td>
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<td class="paramtype">size_t </td>
<td class="paramname"> <em>len</em>, </td>
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<td class="paramtype">const char * </td>
<td class="paramname"> <em>lang</em>, </td>
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<td class="paramtype">char * </td>
<td class="paramname"> <em>brks</em></td><td> </td>
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Sets the line breaking information for a UTF-32 input string.
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<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>s</em> </td><td>input UTF-32 string </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>len</em> </td><td>length of the input </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>lang</em> </td><td>language of the input </td></tr>
<tr><td valign="top"><tt>[out]</tt> </td><td valign="top"><em>brks</em> </td><td>pointer to the output breaking data, containing <a class="el" href="linebreak_8h.html#367d64258fd90864a467687cd1736b77" title="Break is mandatory.">LINEBREAK_MUSTBREAK</a>, <a class="el" href="linebreak_8h.html#229f34b0b72ccb2e53d0936a1e61a363" title="Break is allowed.">LINEBREAK_ALLOWBREAK</a>, <a class="el" href="linebreak_8h.html#dd176a107633817050bedf6eb4f491cc" title="No break is possible.">LINEBREAK_NOBREAK</a>, or <a class="el" href="linebreak_8h.html#5adf3d4831b89cb3e40e9bd31a73a39d" title="A UTF-8/16 sequence is unfinished.">LINEBREAK_INSIDEACHAR</a> </td></tr>
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<a class="anchor" name="b426e9cf68117faf583a0ed54742cb28"></a><!-- doxytag: member="linebreak.h::set_linebreaks_utf8" ref="b426e9cf68117faf583a0ed54742cb28" args="(const utf8_t *s, size_t len, const char *lang, char *brks)" -->
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<td class="memname">void set_linebreaks_utf8 </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="linebreak_8h.html#6103b2105588f239c593e779e605038a">utf8_t</a> * </td>
<td class="paramname"> <em>s</em>, </td>
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<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"> <em>len</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const char * </td>
<td class="paramname"> <em>lang</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">char * </td>
<td class="paramname"> <em>brks</em></td><td> </td>
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<td>)</td>
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Sets the line breaking information for a UTF-8 input string.
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<dl compact><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>s</em> </td><td>input UTF-8 string </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>len</em> </td><td>length of the input </td></tr>
<tr><td valign="top"><tt>[in]</tt> </td><td valign="top"><em>lang</em> </td><td>language of the input </td></tr>
<tr><td valign="top"><tt>[out]</tt> </td><td valign="top"><em>brks</em> </td><td>pointer to the output breaking data, containing <a class="el" href="linebreak_8h.html#367d64258fd90864a467687cd1736b77" title="Break is mandatory.">LINEBREAK_MUSTBREAK</a>, <a class="el" href="linebreak_8h.html#229f34b0b72ccb2e53d0936a1e61a363" title="Break is allowed.">LINEBREAK_ALLOWBREAK</a>, <a class="el" href="linebreak_8h.html#dd176a107633817050bedf6eb4f491cc" title="No break is possible.">LINEBREAK_NOBREAK</a>, or <a class="el" href="linebreak_8h.html#5adf3d4831b89cb3e40e9bd31a73a39d" title="A UTF-8/16 sequence is unfinished.">LINEBREAK_INSIDEACHAR</a> </td></tr>
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<hr><h2>Variable Documentation</h2>
<a class="anchor" name="0ac90a75aa79415fe87e66b95d8fd09b"></a><!-- doxytag: member="linebreak.h::linebreak_version" ref="0ac90a75aa79415fe87e66b95d8fd09b" args="" -->
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<td class="memname">const int <a class="el" href="linebreak_8h.html#0ac90a75aa79415fe87e66b95d8fd09b">linebreak_version</a> </td>
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Version number of the library.
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