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<p>C API: Internationalizing Domain Names in Applications (IDNA)  
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &quot;<a class="el" href="utypes_8h_source.html">unicode/utypes.h</a>&quot;</code><br/>
<code>#include &quot;<a class="el" href="localpointer_8h_source.html">unicode/localpointer.h</a>&quot;</code><br/>
<code>#include &quot;<a class="el" href="parseerr_8h_source.html">unicode/parseerr.h</a>&quot;</code><br/>
</div>
<p><a href="uidna_8h_source.html">Go to the source code of this file.</a></p>
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Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structUIDNAInfo.html">UIDNAInfo</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft">&#160;</td><td class="mdescRight">Output container for IDNA processing errors.  <a href="structUIDNAInfo.html#details">More...</a><br/></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="memitem:namespaceicu"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="namespaceicu.html">icu</a></td></tr>
<tr class="memdesc:namespaceicu"><td class="mdescLeft">&#160;</td><td class="mdescRight">File <a class="el" href="coll_8h.html" title="C++ API: Collation Service. ">coll.h</a>. <br/></td></tr>
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Macros</h2></td></tr>
<tr class="memitem:a4d3da5919e4a9f1142d622212c156bcb"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a4d3da5919e4a9f1142d622212c156bcb">UIDNA_INFO_INITIALIZER</a></td></tr>
<tr class="memdesc:a4d3da5919e4a9f1142d622212c156bcb"><td class="mdescLeft">&#160;</td><td class="mdescRight">Static initializer for a <a class="el" href="structUIDNAInfo.html" title="Output container for IDNA processing errors. ">UIDNAInfo</a> struct.  <a href="#a4d3da5919e4a9f1142d622212c156bcb">More...</a><br/></td></tr>
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Typedefs</h2></td></tr>
<tr class="memitem:a58b6c70b0b7aad538aae49323aa12ec2"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a></td></tr>
<tr class="memdesc:a58b6c70b0b7aad538aae49323aa12ec2"><td class="mdescLeft">&#160;</td><td class="mdescRight">C typedef for struct UIDNA.  <a href="#a58b6c70b0b7aad538aae49323aa12ec2">More...</a><br/></td></tr>
<tr class="separator:a58b6c70b0b7aad538aae49323aa12ec2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a50019512dcc4b62decdee19babf75647"><td class="memItemLeft" align="right" valign="top">typedef struct <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a50019512dcc4b62decdee19babf75647">UIDNAInfo</a></td></tr>
<tr class="memdesc:a50019512dcc4b62decdee19babf75647"><td class="mdescLeft">&#160;</td><td class="mdescRight">Output container for IDNA processing errors.  <a href="#a50019512dcc4b62decdee19babf75647">More...</a><br/></td></tr>
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Enumerations</h2></td></tr>
<tr class="memitem:a726ca809ffd3d67ab4b8476646f26635"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom">{ <br/>
&#160;&#160;<a class="el" href="uidna_8h.html#a726ca809ffd3d67ab4b8476646f26635aa1eb63014cdaf41c7ea6cf3abecf1169">UIDNA_DEFAULT</a> =0, 
<a class="el" href="uidna_8h.html#a726ca809ffd3d67ab4b8476646f26635a40c036f35732a85a90d042ca285a563f">UIDNA_ALLOW_UNASSIGNED</a> =1, 
<a class="el" href="uidna_8h.html#a726ca809ffd3d67ab4b8476646f26635a9d76f3ecebbbfb03f760298d47ad8eb9">UIDNA_USE_STD3_RULES</a> =2, 
<a class="el" href="uidna_8h.html#a726ca809ffd3d67ab4b8476646f26635a8f194e81cea21963d7025ccf3ec85dd8">UIDNA_CHECK_BIDI</a> =4, 
<br/>
&#160;&#160;<a class="el" href="uidna_8h.html#a726ca809ffd3d67ab4b8476646f26635a285a3c3c35593244b4b1d3682298c54d">UIDNA_CHECK_CONTEXTJ</a> =8, 
<a class="el" href="uidna_8h.html#a726ca809ffd3d67ab4b8476646f26635a3a10cd9aeb86fca0e3085a9fc896ede6">UIDNA_NONTRANSITIONAL_TO_ASCII</a> =0x10, 
<a class="el" href="uidna_8h.html#a726ca809ffd3d67ab4b8476646f26635ab42e158cb8c671b266b9f90355ec2f0c">UIDNA_NONTRANSITIONAL_TO_UNICODE</a> =0x20, 
<a class="el" href="uidna_8h.html#a726ca809ffd3d67ab4b8476646f26635a4228928a95c37e7ab3c74542e46b7dae">UIDNA_CHECK_CONTEXTO</a> =0x40
<br/>
 }</td></tr>
<tr class="separator:a726ca809ffd3d67ab4b8476646f26635"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0411cd49bb5b71852cecd93bcbf0ca2d"><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom">{ <br/>
&#160;&#160;<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2dadd2c08d0f91b5b18bd37701f315721c9">UIDNA_ERROR_EMPTY_LABEL</a> =1, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2da5071eb574ee6087ed7850c4e5f307ba4">UIDNA_ERROR_LABEL_TOO_LONG</a> =2, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2dacb4f47fc8696d6ee4b31395fd6607a97">UIDNA_ERROR_DOMAIN_NAME_TOO_LONG</a> =4, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2dad753902b7d5783e75fb3d99505635b5a">UIDNA_ERROR_LEADING_HYPHEN</a> =8, 
<br/>
&#160;&#160;<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2da113fce683a4fd12b13885dab16e2bc0a">UIDNA_ERROR_TRAILING_HYPHEN</a> =0x10, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2da9bebae6483c78a9a4b608ba55f4ad367">UIDNA_ERROR_HYPHEN_3_4</a> =0x20, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2da390a6b3d9844a1dcc1f99fb1ae478ecf">UIDNA_ERROR_LEADING_COMBINING_MARK</a> =0x40, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2da807994d718b83ebd8420294cdb398077">UIDNA_ERROR_DISALLOWED</a> =0x80, 
<br/>
&#160;&#160;<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2daa1514abc5f09fcccd28645301a913834">UIDNA_ERROR_PUNYCODE</a> =0x100, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2da89151c238639213d4859dee188977d9e">UIDNA_ERROR_LABEL_HAS_DOT</a> =0x200, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2dafd70a49037cf9f9107485f279c4e6cba">UIDNA_ERROR_INVALID_ACE_LABEL</a> =0x400, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2da8a9311811fb0f3db1644ac1a88056370">UIDNA_ERROR_BIDI</a> =0x800, 
<br/>
&#160;&#160;<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2da800f864474cc5ab7fa304031aaf10043">UIDNA_ERROR_CONTEXTJ</a> =0x1000, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2dad81d443111d7cd585fef134d7a82de36">UIDNA_ERROR_CONTEXTO_PUNCTUATION</a> =0x2000, 
<a class="el" href="uidna_8h.html#a0411cd49bb5b71852cecd93bcbf0ca2da0206862d880f71ba3ad871ef3e92f97f">UIDNA_ERROR_CONTEXTO_DIGITS</a> =0x4000
<br/>
 }</td></tr>
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Functions</h2></td></tr>
<tr class="memitem:a38d2029aa876f04bfe6ae8b2d5471662"><td class="memItemLeft" align="right" valign="top"><a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a38d2029aa876f04bfe6ae8b2d5471662">uidna_openUTS46</a> (uint32_t options, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *pErrorCode)</td></tr>
<tr class="memdesc:a38d2029aa876f04bfe6ae8b2d5471662"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns a UIDNA instance which implements UTS #46.  <a href="#a38d2029aa876f04bfe6ae8b2d5471662">More...</a><br/></td></tr>
<tr class="separator:a38d2029aa876f04bfe6ae8b2d5471662"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6a28b8f09fc9c2c8016aba5f10f4edcf"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a6a28b8f09fc9c2c8016aba5f10f4edcf">uidna_close</a> (<a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *idna)</td></tr>
<tr class="memdesc:a6a28b8f09fc9c2c8016aba5f10f4edcf"><td class="mdescLeft">&#160;</td><td class="mdescRight">Closes a UIDNA instance.  <a href="#a6a28b8f09fc9c2c8016aba5f10f4edcf">More...</a><br/></td></tr>
<tr class="separator:a6a28b8f09fc9c2c8016aba5f10f4edcf"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad6a9112dff13a1e67faaa1d3bbf51d2f"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#ad6a9112dff13a1e67faaa1d3bbf51d2f">uidna_labelToASCII</a> (const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *idna, const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *label, int32_t length, <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *dest, int32_t capacity, <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *pInfo, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *pErrorCode)</td></tr>
<tr class="memdesc:ad6a9112dff13a1e67faaa1d3bbf51d2f"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts a single domain name label into its ASCII form for DNS lookup.  <a href="#ad6a9112dff13a1e67faaa1d3bbf51d2f">More...</a><br/></td></tr>
<tr class="separator:ad6a9112dff13a1e67faaa1d3bbf51d2f"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aae6f618913aa4029ea7bcb6af7d4860e"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#aae6f618913aa4029ea7bcb6af7d4860e">uidna_labelToUnicode</a> (const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *idna, const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *label, int32_t length, <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *dest, int32_t capacity, <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *pInfo, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *pErrorCode)</td></tr>
<tr class="memdesc:aae6f618913aa4029ea7bcb6af7d4860e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts a single domain name label into its Unicode form for human-readable display.  <a href="#aae6f618913aa4029ea7bcb6af7d4860e">More...</a><br/></td></tr>
<tr class="separator:aae6f618913aa4029ea7bcb6af7d4860e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a9cc0383836cc8b73d14e86d5014ee7ae"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a9cc0383836cc8b73d14e86d5014ee7ae">uidna_nameToASCII</a> (const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *idna, const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *name, int32_t length, <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *dest, int32_t capacity, <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *pInfo, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *pErrorCode)</td></tr>
<tr class="memdesc:a9cc0383836cc8b73d14e86d5014ee7ae"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts a whole domain name into its ASCII form for DNS lookup.  <a href="#a9cc0383836cc8b73d14e86d5014ee7ae">More...</a><br/></td></tr>
<tr class="separator:a9cc0383836cc8b73d14e86d5014ee7ae"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a4a6ddb43b9e5078eb3f90bc6fafa3e30"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a4a6ddb43b9e5078eb3f90bc6fafa3e30">uidna_nameToUnicode</a> (const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *idna, const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *name, int32_t length, <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *dest, int32_t capacity, <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *pInfo, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *pErrorCode)</td></tr>
<tr class="memdesc:a4a6ddb43b9e5078eb3f90bc6fafa3e30"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts a whole domain name into its Unicode form for human-readable display.  <a href="#a4a6ddb43b9e5078eb3f90bc6fafa3e30">More...</a><br/></td></tr>
<tr class="separator:a4a6ddb43b9e5078eb3f90bc6fafa3e30"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac3d23c2283d9b465dd2b17902ff0d405"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#ac3d23c2283d9b465dd2b17902ff0d405">uidna_labelToASCII_UTF8</a> (const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *idna, const char *label, int32_t length, char *dest, int32_t capacity, <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *pInfo, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *pErrorCode)</td></tr>
<tr class="memdesc:ac3d23c2283d9b465dd2b17902ff0d405"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts a single domain name label into its ASCII form for DNS lookup.  <a href="#ac3d23c2283d9b465dd2b17902ff0d405">More...</a><br/></td></tr>
<tr class="separator:ac3d23c2283d9b465dd2b17902ff0d405"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a450410e781b4ce83557396ce5f026b2b"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a450410e781b4ce83557396ce5f026b2b">uidna_labelToUnicodeUTF8</a> (const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *idna, const char *label, int32_t length, char *dest, int32_t capacity, <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *pInfo, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *pErrorCode)</td></tr>
<tr class="memdesc:a450410e781b4ce83557396ce5f026b2b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts a single domain name label into its Unicode form for human-readable display.  <a href="#a450410e781b4ce83557396ce5f026b2b">More...</a><br/></td></tr>
<tr class="separator:a450410e781b4ce83557396ce5f026b2b"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a87a8f1c1b3d5048406ce3ecb80b17c6c"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a87a8f1c1b3d5048406ce3ecb80b17c6c">uidna_nameToASCII_UTF8</a> (const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *idna, const char *name, int32_t length, char *dest, int32_t capacity, <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *pInfo, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *pErrorCode)</td></tr>
<tr class="memdesc:a87a8f1c1b3d5048406ce3ecb80b17c6c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts a whole domain name into its ASCII form for DNS lookup.  <a href="#a87a8f1c1b3d5048406ce3ecb80b17c6c">More...</a><br/></td></tr>
<tr class="separator:a87a8f1c1b3d5048406ce3ecb80b17c6c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a61648a995cff1f8d626df1c16ad4f3b8"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a61648a995cff1f8d626df1c16ad4f3b8">uidna_nameToUnicodeUTF8</a> (const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *idna, const char *name, int32_t length, char *dest, int32_t capacity, <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *pInfo, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *pErrorCode)</td></tr>
<tr class="memdesc:a61648a995cff1f8d626df1c16ad4f3b8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Converts a whole domain name into its Unicode form for human-readable display.  <a href="#a61648a995cff1f8d626df1c16ad4f3b8">More...</a><br/></td></tr>
<tr class="separator:a61648a995cff1f8d626df1c16ad4f3b8"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aaf3bec2415dd99b4221eeebb723eb082"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#aaf3bec2415dd99b4221eeebb723eb082">uidna_toASCII</a> (const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *src, int32_t srcLength, <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *dest, int32_t destCapacity, int32_t options, <a class="el" href="structUParseError.html">UParseError</a> *parseError, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *status)</td></tr>
<tr class="memdesc:aaf3bec2415dd99b4221eeebb723eb082"><td class="mdescLeft">&#160;</td><td class="mdescRight">IDNA2003: This function implements the ToASCII operation as defined in the IDNA RFC.  <a href="#aaf3bec2415dd99b4221eeebb723eb082">More...</a><br/></td></tr>
<tr class="separator:aaf3bec2415dd99b4221eeebb723eb082"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:affc23ca4aea3c6e5150024e5fd5a5b2d"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#affc23ca4aea3c6e5150024e5fd5a5b2d">uidna_toUnicode</a> (const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *src, int32_t srcLength, <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *dest, int32_t destCapacity, int32_t options, <a class="el" href="structUParseError.html">UParseError</a> *parseError, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *status)</td></tr>
<tr class="memdesc:affc23ca4aea3c6e5150024e5fd5a5b2d"><td class="mdescLeft">&#160;</td><td class="mdescRight">IDNA2003: This function implements the ToUnicode operation as defined in the IDNA RFC.  <a href="#affc23ca4aea3c6e5150024e5fd5a5b2d">More...</a><br/></td></tr>
<tr class="separator:affc23ca4aea3c6e5150024e5fd5a5b2d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a711fa1d2e6dd25d7368f5b3ea2aaedc6"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a711fa1d2e6dd25d7368f5b3ea2aaedc6">uidna_IDNToASCII</a> (const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *src, int32_t srcLength, <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *dest, int32_t destCapacity, int32_t options, <a class="el" href="structUParseError.html">UParseError</a> *parseError, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *status)</td></tr>
<tr class="memdesc:a711fa1d2e6dd25d7368f5b3ea2aaedc6"><td class="mdescLeft">&#160;</td><td class="mdescRight">IDNA2003: Convenience function that implements the IDNToASCII operation as defined in the IDNA RFC.  <a href="#a711fa1d2e6dd25d7368f5b3ea2aaedc6">More...</a><br/></td></tr>
<tr class="separator:a711fa1d2e6dd25d7368f5b3ea2aaedc6"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:acf38e44019d4eb5a7dd903284fdb18e3"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#acf38e44019d4eb5a7dd903284fdb18e3">uidna_IDNToUnicode</a> (const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *src, int32_t srcLength, <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *dest, int32_t destCapacity, int32_t options, <a class="el" href="structUParseError.html">UParseError</a> *parseError, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *status)</td></tr>
<tr class="memdesc:acf38e44019d4eb5a7dd903284fdb18e3"><td class="mdescLeft">&#160;</td><td class="mdescRight">IDNA2003: Convenience function that implements the IDNToUnicode operation as defined in the IDNA RFC.  <a href="#acf38e44019d4eb5a7dd903284fdb18e3">More...</a><br/></td></tr>
<tr class="separator:acf38e44019d4eb5a7dd903284fdb18e3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a89b089341501d76335772d8b26ffe0db"><td class="memItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="uidna_8h.html#a89b089341501d76335772d8b26ffe0db">uidna_compare</a> (const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *s1, int32_t length1, const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *s2, int32_t length2, int32_t options, <a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *status)</td></tr>
<tr class="memdesc:a89b089341501d76335772d8b26ffe0db"><td class="mdescLeft">&#160;</td><td class="mdescRight">IDNA2003: Compare two IDN strings for equivalence.  <a href="#a89b089341501d76335772d8b26ffe0db">More...</a><br/></td></tr>
<tr class="separator:a89b089341501d76335772d8b26ffe0db"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>C API: Internationalizing Domain Names in Applications (IDNA) </p>
<p>IDNA2008 is implemented according to UTS #46, see the IDNA C++ class in <a class="el" href="idna_8h.html" title="C++ API: Internationalizing Domain Names in Applications (IDNA) ">idna.h</a>.</p>
<p>The C API functions which do take a UIDNA * service object pointer implement UTS #46 and IDNA2008. The C API functions which do not take a service object pointer implement IDNA2003. </p>

<p>Definition in file <a class="el" href="uidna_8h_source.html">uidna.h</a>.</p>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
<a class="anchor" id="a4d3da5919e4a9f1142d622212c156bcb"></a>
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          <td class="memname">#define UIDNA_INFO_INITIALIZER</td>
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</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line">{ \</div>
<div class="line">    (int16_t)<span class="keyword">sizeof</span>(<a class="code" href="structUIDNAInfo.html">UIDNAInfo</a>), <a class="code" href="umachine_8h.html#aa93f0eb578d23995850d61f7d61c55c1">\</a></div>
<div class="line"><a class="code" href="umachine_8h.html#aa93f0eb578d23995850d61f7d61c55c1">    FALSE</a>, <a class="code" href="umachine_8h.html#aa93f0eb578d23995850d61f7d61c55c1">FALSE</a>, \</div>
<div class="line">    0, 0, 0 }</div>
<div class="ttc" id="structUIDNAInfo_html"><div class="ttname"><a href="structUIDNAInfo.html">UIDNAInfo</a></div><div class="ttdoc">Output container for IDNA processing errors. </div><div class="ttdef"><b>Definition:</b> <a href="uidna_8h_source.html#l00175">uidna.h:175</a></div></div>
<div class="ttc" id="umachine_8h_html_aa93f0eb578d23995850d61f7d61c55c1"><div class="ttname"><a href="umachine_8h.html#aa93f0eb578d23995850d61f7d61c55c1">FALSE</a></div><div class="ttdeci">#define FALSE</div><div class="ttdoc">The FALSE value of a UBool. </div><div class="ttdef"><b>Definition:</b> <a href="umachine_8h_source.html#l00208">umachine.h:208</a></div></div>
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<p>Static initializer for a <a class="el" href="structUIDNAInfo.html" title="Output container for IDNA processing errors. ">UIDNAInfo</a> struct. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001587">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

<p>Definition at line <a class="el" href="uidna_8h_source.html#l00199">199</a> of file <a class="el" href="uidna_8h_source.html">uidna.h</a>.</p>

</div>
</div>
<h2 class="groupheader">Typedef Documentation</h2>
<a class="anchor" id="a58b6c70b0b7aad538aae49323aa12ec2"></a>
<div class="memitem">
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          <td class="memname">typedef struct <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a></td>
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</div><div class="memdoc">

<p>C typedef for struct UIDNA. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001583">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

<p>Definition at line <a class="el" href="uidna_8h_source.html#l00116">116</a> of file <a class="el" href="uidna_8h_source.html">uidna.h</a>.</p>

</div>
</div>
<a class="anchor" id="a50019512dcc4b62decdee19babf75647"></a>
<div class="memitem">
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          <td class="memname">typedef struct <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a>  <a class="el" href="structUIDNAInfo.html">UIDNAInfo</a></td>
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</div><div class="memdoc">

<p>Output container for IDNA processing errors. </p>
<p>Initialize with UIDNA_INFO_INITIALIZER: </p>
<div class="fragment"><div class="line"><a class="code" href="structUIDNAInfo.html">UIDNAInfo</a> info = <a class="code" href="uidna_8h.html#a4d3da5919e4a9f1142d622212c156bcb">UIDNA_INFO_INITIALIZER</a>;</div>
<div class="line">int32_t length = <a class="code" href="uidna_8h.html#a9cc0383836cc8b73d14e86d5014ee7ae">uidna_nameToASCII</a>(..., &amp;info, &amp;errorCode);</div>
<div class="line"><span class="keywordflow">if</span>(<a class="code" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711">U_SUCCESS</a>(errorCode) &amp;&amp; info.<a class="code" href="structUIDNAInfo.html#a2ea60f82939e17d1f64babfcbe354082">errors</a>!=0) { ... }</div>
</div><!-- fragment --> <dl class="stable"><dt><b><a class="el" href="stable.html#_stable001586">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

</div>
</div>
<h2 class="groupheader">Enumeration Type Documentation</h2>
<a class="anchor" id="a726ca809ffd3d67ab4b8476646f26635"></a>
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          <td class="memname">anonymous enum</td>
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<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><em><a class="anchor" id="a726ca809ffd3d67ab4b8476646f26635aa1eb63014cdaf41c7ea6cf3abecf1169"></a>UIDNA_DEFAULT</em>&#160;</td><td class="fielddoc">
<p>Default options value: None of the other options are set. </p>
<p>For use in static worker and factory methods. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001601">Stable:</a></b></dt><dd>ICU 2.6 </dd></dl>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a726ca809ffd3d67ab4b8476646f26635a40c036f35732a85a90d042ca285a563f"></a>UIDNA_ALLOW_UNASSIGNED</em>&#160;</td><td class="fielddoc">
<p>Option to allow unassigned code points in domain names and labels. </p>
<p>For use in static worker and factory methods. </p>
<p>This option is ignored by the UTS46 implementation. (UTS #46 disallows unassigned code points.) </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001602">Stable:</a></b></dt><dd>ICU 2.6 </dd></dl>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a726ca809ffd3d67ab4b8476646f26635a9d76f3ecebbbfb03f760298d47ad8eb9"></a>UIDNA_USE_STD3_RULES</em>&#160;</td><td class="fielddoc">
<p>Option to check whether the input conforms to the STD3 ASCII rules, for example the restriction of labels to LDH characters (ASCII Letters, Digits and Hyphen-Minus). </p>
<p>For use in static worker and factory methods. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001603">Stable:</a></b></dt><dd>ICU 2.6 </dd></dl>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a726ca809ffd3d67ab4b8476646f26635a8f194e81cea21963d7025ccf3ec85dd8"></a>UIDNA_CHECK_BIDI</em>&#160;</td><td class="fielddoc">
<p>IDNA option to check for whether the input conforms to the BiDi rules. </p>
<p>For use in static worker and factory methods. </p>
<p>This option is ignored by the IDNA2003 implementation. (IDNA2003 always performs a BiDi check.) </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001604">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a726ca809ffd3d67ab4b8476646f26635a285a3c3c35593244b4b1d3682298c54d"></a>UIDNA_CHECK_CONTEXTJ</em>&#160;</td><td class="fielddoc">
<p>IDNA option to check for whether the input conforms to the CONTEXTJ rules. </p>
<p>For use in static worker and factory methods. </p>
<p>This option is ignored by the IDNA2003 implementation. (The CONTEXTJ check is new in IDNA2008.) </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001605">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a726ca809ffd3d67ab4b8476646f26635a3a10cd9aeb86fca0e3085a9fc896ede6"></a>UIDNA_NONTRANSITIONAL_TO_ASCII</em>&#160;</td><td class="fielddoc">
<p>IDNA option for nontransitional processing in ToASCII(). </p>
<p>For use in static worker and factory methods. </p>
<p>By default, ToASCII() uses transitional processing. </p>
<p>This option is ignored by the IDNA2003 implementation. (This is only relevant for compatibility of newer IDNA implementations with IDNA2003.) </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001606">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a726ca809ffd3d67ab4b8476646f26635ab42e158cb8c671b266b9f90355ec2f0c"></a>UIDNA_NONTRANSITIONAL_TO_UNICODE</em>&#160;</td><td class="fielddoc">
<p>IDNA option for nontransitional processing in ToUnicode(). </p>
<p>For use in static worker and factory methods. </p>
<p>By default, ToUnicode() uses transitional processing. </p>
<p>This option is ignored by the IDNA2003 implementation. (This is only relevant for compatibility of newer IDNA implementations with IDNA2003.) </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001607">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a726ca809ffd3d67ab4b8476646f26635a4228928a95c37e7ab3c74542e46b7dae"></a>UIDNA_CHECK_CONTEXTO</em>&#160;</td><td class="fielddoc">
<p>IDNA option to check for whether the input conforms to the CONTEXTO rules. </p>
<p>For use in static worker and factory methods. </p>
<p>This option is ignored by the IDNA2003 implementation. (The CONTEXTO check is new in IDNA2008.) </p>
<p>This is for use by registries for IDNA2008 conformance. UTS #46 does not require the CONTEXTO check. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001608">Stable:</a></b></dt><dd>ICU 49 </dd></dl>
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<p>Definition at line <a class="el" href="uidna_8h_source.html#l00042">42</a> of file <a class="el" href="uidna_8h_source.html">uidna.h</a>.</p>

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          <td class="memname">anonymous enum</td>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2dadd2c08d0f91b5b18bd37701f315721c9"></a>UIDNA_ERROR_EMPTY_LABEL</em>&#160;</td><td class="fielddoc">
<p>A non-final domain name label (or the whole domain name) is empty. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001613">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2da5071eb574ee6087ed7850c4e5f307ba4"></a>UIDNA_ERROR_LABEL_TOO_LONG</em>&#160;</td><td class="fielddoc">
<p>A domain name label is longer than 63 bytes. </p>
<p>(See STD13/RFC1034 3.1. Name space specifications and terminology.) This is only checked in ToASCII operations, and only if the output label is all-ASCII. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001614">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2dacb4f47fc8696d6ee4b31395fd6607a97"></a>UIDNA_ERROR_DOMAIN_NAME_TOO_LONG</em>&#160;</td><td class="fielddoc">
<p>A domain name is longer than 255 bytes in its storage form. </p>
<p>(See STD13/RFC1034 3.1. Name space specifications and terminology.) This is only checked in ToASCII operations, and only if the output domain name is all-ASCII. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001615">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2dad753902b7d5783e75fb3d99505635b5a"></a>UIDNA_ERROR_LEADING_HYPHEN</em>&#160;</td><td class="fielddoc">
<p>A label starts with a hyphen-minus ('-'). </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001616">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2da113fce683a4fd12b13885dab16e2bc0a"></a>UIDNA_ERROR_TRAILING_HYPHEN</em>&#160;</td><td class="fielddoc">
<p>A label ends with a hyphen-minus ('-'). </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001617">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2da9bebae6483c78a9a4b608ba55f4ad367"></a>UIDNA_ERROR_HYPHEN_3_4</em>&#160;</td><td class="fielddoc">
<p>A label contains hyphen-minus ('-') in the third and fourth positions. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001618">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2da390a6b3d9844a1dcc1f99fb1ae478ecf"></a>UIDNA_ERROR_LEADING_COMBINING_MARK</em>&#160;</td><td class="fielddoc">
<p>A label starts with a combining mark. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001619">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2da807994d718b83ebd8420294cdb398077"></a>UIDNA_ERROR_DISALLOWED</em>&#160;</td><td class="fielddoc">
<p>A label or domain name contains disallowed characters. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001620">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2daa1514abc5f09fcccd28645301a913834"></a>UIDNA_ERROR_PUNYCODE</em>&#160;</td><td class="fielddoc">
<p>A label starts with "xn--" but does not contain valid Punycode. </p>
<p>That is, an xn&ndash; label failed Punycode decoding. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001621">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2da89151c238639213d4859dee188977d9e"></a>UIDNA_ERROR_LABEL_HAS_DOT</em>&#160;</td><td class="fielddoc">
<p>A label contains a dot=full stop. </p>
<p>This can occur in an input string for a single-label function. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001622">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
</td></tr>
<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2dafd70a49037cf9f9107485f279c4e6cba"></a>UIDNA_ERROR_INVALID_ACE_LABEL</em>&#160;</td><td class="fielddoc">
<p>An ACE label does not contain a valid label string. </p>
<p>The label was successfully ACE (Punycode) decoded but the resulting string had severe validation errors. For example, it might contain characters that are not allowed in ACE labels, or it might not be normalized. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001623">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2da8a9311811fb0f3db1644ac1a88056370"></a>UIDNA_ERROR_BIDI</em>&#160;</td><td class="fielddoc">
<p>A label does not meet the IDNA BiDi requirements (for right-to-left characters). </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001624">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2da800f864474cc5ab7fa304031aaf10043"></a>UIDNA_ERROR_CONTEXTJ</em>&#160;</td><td class="fielddoc">
<p>A label does not meet the IDNA CONTEXTJ requirements. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001625">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2dad81d443111d7cd585fef134d7a82de36"></a>UIDNA_ERROR_CONTEXTO_PUNCTUATION</em>&#160;</td><td class="fielddoc">
<p>A label does not meet the IDNA CONTEXTO requirements for punctuation characters. </p>
<p>Some punctuation characters "Would otherwise have been DISALLOWED" but are allowed in certain contexts. (RFC 5892) </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001626">Stable:</a></b></dt><dd>ICU 49 </dd></dl>
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<tr><td class="fieldname"><em><a class="anchor" id="a0411cd49bb5b71852cecd93bcbf0ca2da0206862d880f71ba3ad871ef3e92f97f"></a>UIDNA_ERROR_CONTEXTO_DIGITS</em>&#160;</td><td class="fielddoc">
<p>A label does not meet the IDNA CONTEXTO requirements for digits. </p>
<p>Arabic-Indic Digits (U+066x) must not be mixed with Extended Arabic-Indic Digits (U+06Fx). </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001627">Stable:</a></b></dt><dd>ICU 49 </dd></dl>
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<p>Definition at line <a class="el" href="uidna_8h_source.html#l00415">415</a> of file <a class="el" href="uidna_8h_source.html">uidna.h</a>.</p>

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<h2 class="groupheader">Function Documentation</h2>
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          <td>(</td>
          <td class="paramtype"><a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td>
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<p>Closes a UIDNA instance. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">idna</td><td>UIDNA instance to be closed </td></tr>
  </table>
  </dd>
</dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001585">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

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          <td>(</td>
          <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>s1</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length1</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>s2</em>, </td>
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          <td class="paramkey"></td>
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          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length2</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>options</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>status</em>&#160;</td>
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<p>IDNA2003: Compare two IDN strings for equivalence. </p>
<p>This function splits the domain names into labels and compares them. According to IDN RFC, whenever two labels are compared, they are considered equal if and only if their ASCII forms (obtained by applying toASCII) match using an case-insensitive ASCII comparison. Two domain names are considered a match if and only if all labels match regardless of whether label separators match.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">s1</td><td>First source string. </td></tr>
    <tr><td class="paramname">length1</td><td>Length of first source string, or -1 if NUL-terminated.</td></tr>
    <tr><td class="paramname">s2</td><td>Second source string. </td></tr>
    <tr><td class="paramname">length2</td><td>Length of second source string, or -1 if NUL-terminated. </td></tr>
    <tr><td class="paramname">options</td><td>A bit set of options:</td></tr>
  </table>
  </dd>
</dl>
<ul>
<li>UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points and do not use STD3 ASCII rules If unassigned code points are found the operation fails with U_UNASSIGNED_CODE_POINT_FOUND error code.</li>
<li>UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations If this option is set, the unassigned code points are in the input are treated as normal Unicode code points.</li>
<li>UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions If this option is set and the input does not satisfy STD3 rules, the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR</li>
</ul>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">status</td><td>ICU error code in/out parameter. Must fulfill U_SUCCESS before the function call. </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>&lt;0 or 0 or &gt;0 as usual for string comparisons </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001600">Stable:</a></b></dt><dd>ICU 2.6 </dd></dl>

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          <td class="paramname"><em>src</em>, </td>
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          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>srcLength</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>destCapacity</em>, </td>
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          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>options</em>, </td>
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          <td class="paramtype"><a class="el" href="structUParseError.html">UParseError</a> *&#160;</td>
          <td class="paramname"><em>parseError</em>, </td>
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          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
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<p>IDNA2003: Convenience function that implements the IDNToASCII operation as defined in the IDNA RFC. </p>
<p>This operation is done on complete domain names, e.g: "www.example.com". It is important to note that this operation can fail. If it fails, then the input domain name cannot be used as an Internationalized Domain Name and the application should have methods defined to deal with the failure.</p>
<p><b>Note:</b> IDNA RFC specifies that a conformant application should divide a domain name into separate labels, decide whether to apply allowUnassigned and useSTD3ASCIIRules on each, and then convert. This function does not offer that level of granularity. The options once set will apply to all labels in the domain name</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">src</td><td>Input UChar array containing IDN in Unicode. </td></tr>
    <tr><td class="paramname">srcLength</td><td>Number of UChars in src, or -1 if NUL-terminated. </td></tr>
    <tr><td class="paramname">dest</td><td>Output UChar array with ASCII (ACE encoded) IDN. </td></tr>
    <tr><td class="paramname">destCapacity</td><td>Size of dest. </td></tr>
    <tr><td class="paramname">options</td><td>A bit set of options:</td></tr>
  </table>
  </dd>
</dl>
<ul>
<li>UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points and do not use STD3 ASCII rules If unassigned code points are found the operation fails with U_UNASSIGNED_CODE_POINT_FOUND error code.</li>
<li>UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations If this option is set, the unassigned code points are in the input are treated as normal Unicode code points.</li>
<li>UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions If this option is set and the input does not satisfy STD3 rules, the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR</li>
</ul>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">parseError</td><td>Pointer to <a class="el" href="structUParseError.html" title="A UParseError struct is used to returned detailed information about parsing errors. ">UParseError</a> struct to receive information on position of error if an error is encountered. Can be NULL. </td></tr>
    <tr><td class="paramname">status</td><td>ICU in/out error code parameter. U_INVALID_CHAR_FOUND if src contains unmatched single surrogates. U_INDEX_OUTOFBOUNDS_ERROR if src contains too many code points. U_BUFFER_OVERFLOW_ERROR if destCapacity is not enough </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The length of the result string, if successful - or in case of a buffer overflow, in which case it will be greater than destCapacity. </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001598">Stable:</a></b></dt><dd>ICU 2.6 </dd></dl>

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          <td>(</td>
          <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>src</em>, </td>
        </tr>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>srcLength</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>destCapacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>options</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUParseError.html">UParseError</a> *&#160;</td>
          <td class="paramname"><em>parseError</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>status</em>&#160;</td>
        </tr>
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          <td>)</td>
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<p>IDNA2003: Convenience function that implements the IDNToUnicode operation as defined in the IDNA RFC. </p>
<p>This operation is done on complete domain names, e.g: "www.example.com".</p>
<p><b>Note:</b> IDNA RFC specifies that a conformant application should divide a domain name into separate labels, decide whether to apply allowUnassigned and useSTD3ASCIIRules on each, and then convert. This function does not offer that level of granularity. The options once set will apply to all labels in the domain name</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">src</td><td>Input UChar array containing IDN in ASCII (ACE encoded) form. </td></tr>
    <tr><td class="paramname">srcLength</td><td>Number of UChars in src, or -1 if NUL-terminated. </td></tr>
    <tr><td class="paramname">dest</td><td>Output UChar array containing Unicode equivalent of source IDN. </td></tr>
    <tr><td class="paramname">destCapacity</td><td>Size of dest. </td></tr>
    <tr><td class="paramname">options</td><td>A bit set of options:</td></tr>
  </table>
  </dd>
</dl>
<ul>
<li>UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points and do not use STD3 ASCII rules If unassigned code points are found the operation fails with U_UNASSIGNED_CODE_POINT_FOUND error code.</li>
<li>UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations If this option is set, the unassigned code points are in the input are treated as normal Unicode code points.</li>
<li>UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions If this option is set and the input does not satisfy STD3 rules, the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR</li>
</ul>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">parseError</td><td>Pointer to <a class="el" href="structUParseError.html" title="A UParseError struct is used to returned detailed information about parsing errors. ">UParseError</a> struct to receive information on position of error if an error is encountered. Can be NULL. </td></tr>
    <tr><td class="paramname">status</td><td>ICU in/out error code parameter. U_INVALID_CHAR_FOUND if src contains unmatched single surrogates. U_INDEX_OUTOFBOUNDS_ERROR if src contains too many code points. U_BUFFER_OVERFLOW_ERROR if destCapacity is not enough </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The length of the result string, if successful - or in case of a buffer overflow, in which case it will be greater than destCapacity. </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001599">Stable:</a></b></dt><dd>ICU 2.6 </dd></dl>

</div>
</div>
<a class="anchor" id="ad6a9112dff13a1e67faaa1d3bbf51d2f"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int32_t uidna_labelToASCII </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td>
          <td class="paramname"><em>idna</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>label</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>capacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *&#160;</td>
          <td class="paramname"><em>pInfo</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>pErrorCode</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Converts a single domain name label into its ASCII form for DNS lookup. </p>
<p>If any processing step fails, then pInfo-&gt;errors will be non-zero and the result might not be an ASCII string. The label might be modified according to the types of errors. Labels with severe errors will be left in (or turned into) their Unicode form.</p>
<p>The UErrorCode indicates an error only in exceptional cases, such as a U_MEMORY_ALLOCATION_ERROR.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">idna</td><td>UIDNA instance </td></tr>
    <tr><td class="paramname">label</td><td>Input domain name label </td></tr>
    <tr><td class="paramname">length</td><td>Label length, or -1 if NUL-terminated </td></tr>
    <tr><td class="paramname">dest</td><td>Destination string buffer </td></tr>
    <tr><td class="paramname">capacity</td><td>Destination buffer capacity </td></tr>
    <tr><td class="paramname">pInfo</td><td>Output container of IDNA processing details. </td></tr>
    <tr><td class="paramname">pErrorCode</td><td>Standard ICU error code. Its input value must pass the <a class="el" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711" title="Does the error code indicate success? ">U_SUCCESS()</a> test, or else the function returns immediately. Check for <a class="el" href="utypes_8h.html#a4d202200b6aa6f3c965ea370e0c8155f" title="Does the error code indicate a failure? ">U_FAILURE()</a> on output or use with function chaining. (See User Guide for details.) </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>destination string length </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001588">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

</div>
</div>
<a class="anchor" id="ac3d23c2283d9b465dd2b17902ff0d405"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int32_t uidna_labelToASCII_UTF8 </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td>
          <td class="paramname"><em>idna</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const char *&#160;</td>
          <td class="paramname"><em>label</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">char *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>capacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *&#160;</td>
          <td class="paramname"><em>pInfo</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>pErrorCode</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Converts a single domain name label into its ASCII form for DNS lookup. </p>
<p>UTF-8 version of <a class="el" href="uidna_8h.html#ad6a9112dff13a1e67faaa1d3bbf51d2f" title="Converts a single domain name label into its ASCII form for DNS lookup. ">uidna_labelToASCII()</a>, same behavior.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">idna</td><td>UIDNA instance </td></tr>
    <tr><td class="paramname">label</td><td>Input domain name label </td></tr>
    <tr><td class="paramname">length</td><td>Label length, or -1 if NUL-terminated </td></tr>
    <tr><td class="paramname">dest</td><td>Destination string buffer </td></tr>
    <tr><td class="paramname">capacity</td><td>Destination buffer capacity </td></tr>
    <tr><td class="paramname">pInfo</td><td>Output container of IDNA processing details. </td></tr>
    <tr><td class="paramname">pErrorCode</td><td>Standard ICU error code. Its input value must pass the <a class="el" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711" title="Does the error code indicate success? ">U_SUCCESS()</a> test, or else the function returns immediately. Check for <a class="el" href="utypes_8h.html#a4d202200b6aa6f3c965ea370e0c8155f" title="Does the error code indicate a failure? ">U_FAILURE()</a> on output or use with function chaining. (See User Guide for details.) </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>destination string length </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001592">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

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</div>
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<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int32_t uidna_labelToUnicode </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td>
          <td class="paramname"><em>idna</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>label</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>capacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *&#160;</td>
          <td class="paramname"><em>pInfo</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>pErrorCode</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Converts a single domain name label into its Unicode form for human-readable display. </p>
<p>If any processing step fails, then pInfo-&gt;errors will be non-zero. The label might be modified according to the types of errors.</p>
<p>The UErrorCode indicates an error only in exceptional cases, such as a U_MEMORY_ALLOCATION_ERROR.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">idna</td><td>UIDNA instance </td></tr>
    <tr><td class="paramname">label</td><td>Input domain name label </td></tr>
    <tr><td class="paramname">length</td><td>Label length, or -1 if NUL-terminated </td></tr>
    <tr><td class="paramname">dest</td><td>Destination string buffer </td></tr>
    <tr><td class="paramname">capacity</td><td>Destination buffer capacity </td></tr>
    <tr><td class="paramname">pInfo</td><td>Output container of IDNA processing details. </td></tr>
    <tr><td class="paramname">pErrorCode</td><td>Standard ICU error code. Its input value must pass the <a class="el" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711" title="Does the error code indicate success? ">U_SUCCESS()</a> test, or else the function returns immediately. Check for <a class="el" href="utypes_8h.html#a4d202200b6aa6f3c965ea370e0c8155f" title="Does the error code indicate a failure? ">U_FAILURE()</a> on output or use with function chaining. (See User Guide for details.) </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>destination string length </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001589">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

</div>
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<a class="anchor" id="a450410e781b4ce83557396ce5f026b2b"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int32_t uidna_labelToUnicodeUTF8 </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td>
          <td class="paramname"><em>idna</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const char *&#160;</td>
          <td class="paramname"><em>label</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">char *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>capacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *&#160;</td>
          <td class="paramname"><em>pInfo</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>pErrorCode</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Converts a single domain name label into its Unicode form for human-readable display. </p>
<p>UTF-8 version of <a class="el" href="uidna_8h.html#aae6f618913aa4029ea7bcb6af7d4860e" title="Converts a single domain name label into its Unicode form for human-readable display. ">uidna_labelToUnicode()</a>, same behavior.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">idna</td><td>UIDNA instance </td></tr>
    <tr><td class="paramname">label</td><td>Input domain name label </td></tr>
    <tr><td class="paramname">length</td><td>Label length, or -1 if NUL-terminated </td></tr>
    <tr><td class="paramname">dest</td><td>Destination string buffer </td></tr>
    <tr><td class="paramname">capacity</td><td>Destination buffer capacity </td></tr>
    <tr><td class="paramname">pInfo</td><td>Output container of IDNA processing details. </td></tr>
    <tr><td class="paramname">pErrorCode</td><td>Standard ICU error code. Its input value must pass the <a class="el" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711" title="Does the error code indicate success? ">U_SUCCESS()</a> test, or else the function returns immediately. Check for <a class="el" href="utypes_8h.html#a4d202200b6aa6f3c965ea370e0c8155f" title="Does the error code indicate a failure? ">U_FAILURE()</a> on output or use with function chaining. (See User Guide for details.) </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>destination string length </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001593">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

</div>
</div>
<a class="anchor" id="a9cc0383836cc8b73d14e86d5014ee7ae"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int32_t uidna_nameToASCII </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td>
          <td class="paramname"><em>idna</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>name</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>capacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *&#160;</td>
          <td class="paramname"><em>pInfo</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>pErrorCode</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Converts a whole domain name into its ASCII form for DNS lookup. </p>
<p>If any processing step fails, then pInfo-&gt;errors will be non-zero and the result might not be an ASCII string. The domain name might be modified according to the types of errors. Labels with severe errors will be left in (or turned into) their Unicode form.</p>
<p>The UErrorCode indicates an error only in exceptional cases, such as a U_MEMORY_ALLOCATION_ERROR.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">idna</td><td>UIDNA instance </td></tr>
    <tr><td class="paramname">name</td><td>Input domain name </td></tr>
    <tr><td class="paramname">length</td><td>Domain name length, or -1 if NUL-terminated </td></tr>
    <tr><td class="paramname">dest</td><td>Destination string buffer </td></tr>
    <tr><td class="paramname">capacity</td><td>Destination buffer capacity </td></tr>
    <tr><td class="paramname">pInfo</td><td>Output container of IDNA processing details. </td></tr>
    <tr><td class="paramname">pErrorCode</td><td>Standard ICU error code. Its input value must pass the <a class="el" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711" title="Does the error code indicate success? ">U_SUCCESS()</a> test, or else the function returns immediately. Check for <a class="el" href="utypes_8h.html#a4d202200b6aa6f3c965ea370e0c8155f" title="Does the error code indicate a failure? ">U_FAILURE()</a> on output or use with function chaining. (See User Guide for details.) </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>destination string length </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001590">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

</div>
</div>
<a class="anchor" id="a87a8f1c1b3d5048406ce3ecb80b17c6c"></a>
<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">int32_t uidna_nameToASCII_UTF8 </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td>
          <td class="paramname"><em>idna</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const char *&#160;</td>
          <td class="paramname"><em>name</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">char *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>capacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *&#160;</td>
          <td class="paramname"><em>pInfo</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>pErrorCode</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Converts a whole domain name into its ASCII form for DNS lookup. </p>
<p>UTF-8 version of <a class="el" href="uidna_8h.html#a9cc0383836cc8b73d14e86d5014ee7ae" title="Converts a whole domain name into its ASCII form for DNS lookup. ">uidna_nameToASCII()</a>, same behavior.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">idna</td><td>UIDNA instance </td></tr>
    <tr><td class="paramname">name</td><td>Input domain name </td></tr>
    <tr><td class="paramname">length</td><td>Domain name length, or -1 if NUL-terminated </td></tr>
    <tr><td class="paramname">dest</td><td>Destination string buffer </td></tr>
    <tr><td class="paramname">capacity</td><td>Destination buffer capacity </td></tr>
    <tr><td class="paramname">pInfo</td><td>Output container of IDNA processing details. </td></tr>
    <tr><td class="paramname">pErrorCode</td><td>Standard ICU error code. Its input value must pass the <a class="el" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711" title="Does the error code indicate success? ">U_SUCCESS()</a> test, or else the function returns immediately. Check for <a class="el" href="utypes_8h.html#a4d202200b6aa6f3c965ea370e0c8155f" title="Does the error code indicate a failure? ">U_FAILURE()</a> on output or use with function chaining. (See User Guide for details.) </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>destination string length </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001594">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

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          <td class="memname">int32_t uidna_nameToUnicode </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td>
          <td class="paramname"><em>idna</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>name</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>capacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *&#160;</td>
          <td class="paramname"><em>pInfo</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>pErrorCode</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
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<p>Converts a whole domain name into its Unicode form for human-readable display. </p>
<p>If any processing step fails, then pInfo-&gt;errors will be non-zero. The domain name might be modified according to the types of errors.</p>
<p>The UErrorCode indicates an error only in exceptional cases, such as a U_MEMORY_ALLOCATION_ERROR.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">idna</td><td>UIDNA instance </td></tr>
    <tr><td class="paramname">name</td><td>Input domain name </td></tr>
    <tr><td class="paramname">length</td><td>Domain name length, or -1 if NUL-terminated </td></tr>
    <tr><td class="paramname">dest</td><td>Destination string buffer </td></tr>
    <tr><td class="paramname">capacity</td><td>Destination buffer capacity </td></tr>
    <tr><td class="paramname">pInfo</td><td>Output container of IDNA processing details. </td></tr>
    <tr><td class="paramname">pErrorCode</td><td>Standard ICU error code. Its input value must pass the <a class="el" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711" title="Does the error code indicate success? ">U_SUCCESS()</a> test, or else the function returns immediately. Check for <a class="el" href="utypes_8h.html#a4d202200b6aa6f3c965ea370e0c8155f" title="Does the error code indicate a failure? ">U_FAILURE()</a> on output or use with function chaining. (See User Guide for details.) </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>destination string length </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001591">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

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          <td>(</td>
          <td class="paramtype">const <a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a> *&#160;</td>
          <td class="paramname"><em>idna</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">const char *&#160;</td>
          <td class="paramname"><em>name</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>length</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">char *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>capacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUIDNAInfo.html">UIDNAInfo</a> *&#160;</td>
          <td class="paramname"><em>pInfo</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>pErrorCode</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
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<p>Converts a whole domain name into its Unicode form for human-readable display. </p>
<p>UTF-8 version of <a class="el" href="uidna_8h.html#a4a6ddb43b9e5078eb3f90bc6fafa3e30" title="Converts a whole domain name into its Unicode form for human-readable display. ">uidna_nameToUnicode()</a>, same behavior.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">idna</td><td>UIDNA instance </td></tr>
    <tr><td class="paramname">name</td><td>Input domain name </td></tr>
    <tr><td class="paramname">length</td><td>Domain name length, or -1 if NUL-terminated </td></tr>
    <tr><td class="paramname">dest</td><td>Destination string buffer </td></tr>
    <tr><td class="paramname">capacity</td><td>Destination buffer capacity </td></tr>
    <tr><td class="paramname">pInfo</td><td>Output container of IDNA processing details. </td></tr>
    <tr><td class="paramname">pErrorCode</td><td>Standard ICU error code. Its input value must pass the <a class="el" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711" title="Does the error code indicate success? ">U_SUCCESS()</a> test, or else the function returns immediately. Check for <a class="el" href="utypes_8h.html#a4d202200b6aa6f3c965ea370e0c8155f" title="Does the error code indicate a failure? ">U_FAILURE()</a> on output or use with function chaining. (See User Guide for details.) </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>destination string length </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001595">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

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          <td class="memname"><a class="el" href="uidna_8h.html#a58b6c70b0b7aad538aae49323aa12ec2">UIDNA</a>* uidna_openUTS46 </td>
          <td>(</td>
          <td class="paramtype">uint32_t&#160;</td>
          <td class="paramname"><em>options</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>pErrorCode</em>&#160;</td>
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          <td></td>
          <td>)</td>
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<p>Returns a UIDNA instance which implements UTS #46. </p>
<p>Returns an unmodifiable instance, owned by the caller. Cache it for multiple operations, and <a class="el" href="uidna_8h.html#a6a28b8f09fc9c2c8016aba5f10f4edcf" title="Closes a UIDNA instance. ">uidna_close()</a> it when done. The instance is thread-safe, that is, it can be used concurrently.</p>
<p>For details about the UTS #46 implementation see the IDNA C++ class in <a class="el" href="idna_8h.html" title="C++ API: Internationalizing Domain Names in Applications (IDNA) ">idna.h</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">options</td><td>Bit set to modify the processing and error checking. See option bit set values in <a class="el" href="uidna_8h.html" title="C API: Internationalizing Domain Names in Applications (IDNA) ">uidna.h</a>. </td></tr>
    <tr><td class="paramname">pErrorCode</td><td>Standard ICU error code. Its input value must pass the <a class="el" href="utypes_8h.html#a527f2c69e6b2e3b2c53ad8a99fb36711" title="Does the error code indicate success? ">U_SUCCESS()</a> test, or else the function returns immediately. Check for <a class="el" href="utypes_8h.html#a4d202200b6aa6f3c965ea370e0c8155f" title="Does the error code indicate a failure? ">U_FAILURE()</a> on output or use with function chaining. (See User Guide for details.) </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>the UTS #46 UIDNA instance, if successful </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001584">Stable:</a></b></dt><dd>ICU 4.6 </dd></dl>

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          <td class="memname">int32_t uidna_toASCII </td>
          <td>(</td>
          <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>src</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>srcLength</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>destCapacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>options</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUParseError.html">UParseError</a> *&#160;</td>
          <td class="paramname"><em>parseError</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>status</em>&#160;</td>
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<p>IDNA2003: This function implements the ToASCII operation as defined in the IDNA RFC. </p>
<p>This operation is done on <b>single labels</b> before sending it to something that expects ASCII names. A label is an individual part of a domain name. Labels are usually separated by dots; e.g. "www.example.com" is composed of 3 labels "www","example", and "com".</p>
<p>IDNA2003 API Overview:</p>
<p>The uidna_ API implements the IDNA protocol as defined in the IDNA RFC (<a href="http://www.ietf.org/rfc/rfc3490.txt">http://www.ietf.org/rfc/rfc3490.txt</a>). The RFC defines 2 operations: ToASCII and ToUnicode. Domain name labels containing non-ASCII code points are processed by the ToASCII operation before passing it to resolver libraries. Domain names that are obtained from resolver libraries are processed by the ToUnicode operation before displaying the domain name to the user. IDNA requires that implementations process input strings with Nameprep (<a href="http://www.ietf.org/rfc/rfc3491.txt">http://www.ietf.org/rfc/rfc3491.txt</a>), which is a profile of Stringprep (<a href="http://www.ietf.org/rfc/rfc3454.txt">http://www.ietf.org/rfc/rfc3454.txt</a>), and then with Punycode (<a href="http://www.ietf.org/rfc/rfc3492.txt">http://www.ietf.org/rfc/rfc3492.txt</a>). Implementations of IDNA MUST fully implement Nameprep and Punycode; neither Nameprep nor Punycode are optional. The input and output of ToASCII and ToUnicode operations are Unicode and are designed to be chainable, i.e., applying ToASCII or ToUnicode operations multiple times to an input string will yield the same result as applying the operation once. ToUnicode(ToUnicode(ToUnicode...(ToUnicode(string)))) == ToUnicode(string) ToASCII(ToASCII(ToASCII...(ToASCII(string))) == ToASCII(string).</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">src</td><td>Input UChar array containing label in Unicode. </td></tr>
    <tr><td class="paramname">srcLength</td><td>Number of UChars in src, or -1 if NUL-terminated. </td></tr>
    <tr><td class="paramname">dest</td><td>Output UChar array with ASCII (ACE encoded) label. </td></tr>
    <tr><td class="paramname">destCapacity</td><td>Size of dest. </td></tr>
    <tr><td class="paramname">options</td><td>A bit set of options:</td></tr>
  </table>
  </dd>
</dl>
<ul>
<li>UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points and do not use STD3 ASCII rules If unassigned code points are found the operation fails with U_UNASSIGNED_ERROR error code.</li>
<li>UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations If this option is set, the unassigned code points are in the input are treated as normal Unicode code points.</li>
<li>UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions If this option is set and the input does not satisfy STD3 rules, the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR</li>
</ul>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">parseError</td><td>Pointer to <a class="el" href="structUParseError.html" title="A UParseError struct is used to returned detailed information about parsing errors. ">UParseError</a> struct to receive information on position of error if an error is encountered. Can be NULL. </td></tr>
    <tr><td class="paramname">status</td><td>ICU in/out error code parameter. U_INVALID_CHAR_FOUND if src contains unmatched single surrogates. U_INDEX_OUTOFBOUNDS_ERROR if src contains too many code points. U_BUFFER_OVERFLOW_ERROR if destCapacity is not enough </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The length of the result string, if successful - or in case of a buffer overflow, in which case it will be greater than destCapacity. </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001596">Stable:</a></b></dt><dd>ICU 2.6 </dd></dl>

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          <td>(</td>
          <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>src</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>srcLength</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *&#160;</td>
          <td class="paramname"><em>dest</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>destCapacity</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype">int32_t&#160;</td>
          <td class="paramname"><em>options</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="structUParseError.html">UParseError</a> *&#160;</td>
          <td class="paramname"><em>parseError</em>, </td>
        </tr>
        <tr>
          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="utypes_8h.html#a3343c1c8a8377277046774691c98d78c">UErrorCode</a> *&#160;</td>
          <td class="paramname"><em>status</em>&#160;</td>
        </tr>
        <tr>
          <td></td>
          <td>)</td>
          <td></td><td></td>
        </tr>
      </table>
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<p>IDNA2003: This function implements the ToUnicode operation as defined in the IDNA RFC. </p>
<p>This operation is done on <b>single labels</b> before sending it to something that expects Unicode names. A label is an individual part of a domain name. Labels are usually separated by dots; for e.g. "www.example.com" is composed of 3 labels "www","example", and "com".</p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">src</td><td>Input UChar array containing ASCII (ACE encoded) label. </td></tr>
    <tr><td class="paramname">srcLength</td><td>Number of UChars in src, or -1 if NUL-terminated. </td></tr>
    <tr><td class="paramname">dest</td><td>Output Converted UChar array containing Unicode equivalent of label. </td></tr>
    <tr><td class="paramname">destCapacity</td><td>Size of dest. </td></tr>
    <tr><td class="paramname">options</td><td>A bit set of options:</td></tr>
  </table>
  </dd>
</dl>
<ul>
<li>UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points and do not use STD3 ASCII rules If unassigned code points are found the operation fails with U_UNASSIGNED_ERROR error code.</li>
<li>UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations If this option is set, the unassigned code points are in the input are treated as normal Unicode code points. <b> Note: </b> This option is required on toUnicode operation because the RFC mandates verification of decoded ACE input by applying toASCII and comparing its output with source</li>
<li>UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions If this option is set and the input does not satisfy STD3 rules, the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR</li>
</ul>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramname">parseError</td><td>Pointer to <a class="el" href="structUParseError.html" title="A UParseError struct is used to returned detailed information about parsing errors. ">UParseError</a> struct to receive information on position of error if an error is encountered. Can be NULL. </td></tr>
    <tr><td class="paramname">status</td><td>ICU in/out error code parameter. U_INVALID_CHAR_FOUND if src contains unmatched single surrogates. U_INDEX_OUTOFBOUNDS_ERROR if src contains too many code points. U_BUFFER_OVERFLOW_ERROR if destCapacity is not enough </td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>The length of the result string, if successful - or in case of a buffer overflow, in which case it will be greater than destCapacity. </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable001597">Stable:</a></b></dt><dd>ICU 2.6 </dd></dl>

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