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<p>Basic types and constants for UTF.  
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &quot;<a class="el" href="ptypes_8h_source.html">unicode/ptypes.h</a>&quot;</code><br />
<code>#include &lt;stdbool.h&gt;</code><br />
<code>#include &lt;stddef.h&gt;</code><br />
<code>#include &quot;unicode/urename.h&quot;</code><br />
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<tr class="memitem:af702d65cba0638c5a8194cccc8d7c39e"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#af702d65cba0638c5a8194cccc8d7c39e">U_CFUNC</a>&#160;&#160;&#160;extern</td></tr>
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<tr class="memdesc:a1f2a107433f276c69c8f8ab826fe6374"><td class="mdescLeft">&#160;</td><td class="mdescRight">This is used for GCC specific attributes.  <a href="umachine_8h.html#a1f2a107433f276c69c8f8ab826fe6374">More...</a><br /></td></tr>
<tr class="separator:a1f2a107433f276c69c8f8ab826fe6374"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="memdesc:a41691e68155dca13bc1f020fa30dac82"><td class="mdescLeft">&#160;</td><td class="mdescRight">Obsolete/same as U_CAPI; was used to declare a function as a draft public ICU C API <br  />
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<tr class="memdesc:a1f8a29b64d3745f904fde5d8830d98f5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Obsolete/same as U_CAPI; was used to declare a function as an obsolete public ICU C API <br  />
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<tr class="memdesc:a161dba69f4e479c3626793efc42f94ba"><td class="mdescLeft">&#160;</td><td class="mdescRight">Obsolete/same as U_CAPI; was used to declare a function as an internal ICU C API <br  />
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<tr class="separator:abfdc26d020b4fab3ed5ca2b98fe5df43"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="memdesc:a983e6cc57f8c1b0c5b9ad9ceb290418a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Defined as "while (false)" by default.  <a href="umachine_8h.html#a983e6cc57f8c1b0c5b9ad9ceb290418a">More...</a><br /></td></tr>
<tr class="separator:a983e6cc57f8c1b0c5b9ad9ceb290418a"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="memdesc:aadcf2a81af243df333b31efa6461ab8e"><td class="mdescLeft">&#160;</td><td class="mdescRight">The smallest value an 8 bit signed integer can hold.  <a href="umachine_8h.html#aadcf2a81af243df333b31efa6461ab8e">More...</a><br /></td></tr>
<tr class="separator:aadcf2a81af243df333b31efa6461ab8e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ad4e9955955b27624963643eac448118a"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#ad4e9955955b27624963643eac448118a">INT16_MIN</a>&#160;&#160;&#160;((int16_t)(-32767-1))</td></tr>
<tr class="memdesc:ad4e9955955b27624963643eac448118a"><td class="mdescLeft">&#160;</td><td class="mdescRight">The smallest value a 16 bit signed integer can hold.  <a href="umachine_8h.html#ad4e9955955b27624963643eac448118a">More...</a><br /></td></tr>
<tr class="separator:ad4e9955955b27624963643eac448118a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a688eb21a22db27c2b2bd5836943cdcbe"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a688eb21a22db27c2b2bd5836943cdcbe">INT32_MIN</a>&#160;&#160;&#160;((int32_t)(-2147483647-1))</td></tr>
<tr class="memdesc:a688eb21a22db27c2b2bd5836943cdcbe"><td class="mdescLeft">&#160;</td><td class="mdescRight">The smallest value a 32 bit signed integer can hold.  <a href="umachine_8h.html#a688eb21a22db27c2b2bd5836943cdcbe">More...</a><br /></td></tr>
<tr class="separator:a688eb21a22db27c2b2bd5836943cdcbe"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aaf7f29f45f1a513b4748a4e5014ddf6a"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#aaf7f29f45f1a513b4748a4e5014ddf6a">INT8_MAX</a>&#160;&#160;&#160;((int8_t)(127))</td></tr>
<tr class="memdesc:aaf7f29f45f1a513b4748a4e5014ddf6a"><td class="mdescLeft">&#160;</td><td class="mdescRight">The largest value an 8 bit signed integer can hold.  <a href="umachine_8h.html#aaf7f29f45f1a513b4748a4e5014ddf6a">More...</a><br /></td></tr>
<tr class="separator:aaf7f29f45f1a513b4748a4e5014ddf6a"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac58f2c111cc9989c86db2a7dc4fd84ca"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#ac58f2c111cc9989c86db2a7dc4fd84ca">INT16_MAX</a>&#160;&#160;&#160;((int16_t)(32767))</td></tr>
<tr class="memdesc:ac58f2c111cc9989c86db2a7dc4fd84ca"><td class="mdescLeft">&#160;</td><td class="mdescRight">The largest value a 16 bit signed integer can hold.  <a href="umachine_8h.html#ac58f2c111cc9989c86db2a7dc4fd84ca">More...</a><br /></td></tr>
<tr class="separator:ac58f2c111cc9989c86db2a7dc4fd84ca"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="memdesc:a181807730d4a375f848ba139813ce04f"><td class="mdescLeft">&#160;</td><td class="mdescRight">The largest value a 32 bit signed integer can hold.  <a href="umachine_8h.html#a181807730d4a375f848ba139813ce04f">More...</a><br /></td></tr>
<tr class="separator:a181807730d4a375f848ba139813ce04f"><td class="memSeparator" colspan="2">&#160;</td></tr>
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<tr class="memdesc:aeb4e270a084ee26fe73e799861bd0252"><td class="mdescLeft">&#160;</td><td class="mdescRight">The largest value an 8 bit unsigned integer can hold.  <a href="umachine_8h.html#aeb4e270a084ee26fe73e799861bd0252">More...</a><br /></td></tr>
<tr class="separator:aeb4e270a084ee26fe73e799861bd0252"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3ea490c9b3617d4479bd80ef93cd5602"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a3ea490c9b3617d4479bd80ef93cd5602">UINT16_MAX</a>&#160;&#160;&#160;((uint16_t)(65535U))</td></tr>
<tr class="memdesc:a3ea490c9b3617d4479bd80ef93cd5602"><td class="mdescLeft">&#160;</td><td class="mdescRight">The largest value a 16 bit unsigned integer can hold.  <a href="umachine_8h.html#a3ea490c9b3617d4479bd80ef93cd5602">More...</a><br /></td></tr>
<tr class="separator:a3ea490c9b3617d4479bd80ef93cd5602"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab5eb23180f7cc12b7d6c04a8ec067fdd"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#ab5eb23180f7cc12b7d6c04a8ec067fdd">UINT32_MAX</a>&#160;&#160;&#160;((uint32_t)(4294967295U))</td></tr>
<tr class="memdesc:ab5eb23180f7cc12b7d6c04a8ec067fdd"><td class="mdescLeft">&#160;</td><td class="mdescRight">The largest value a 32 bit unsigned integer can hold.  <a href="umachine_8h.html#ab5eb23180f7cc12b7d6c04a8ec067fdd">More...</a><br /></td></tr>
<tr class="separator:ab5eb23180f7cc12b7d6c04a8ec067fdd"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a22369e5d04efcda4162fdb0f5759318e"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a22369e5d04efcda4162fdb0f5759318e">INT64_C</a>(c)&#160;&#160;&#160;c ## LL</td></tr>
<tr class="memdesc:a22369e5d04efcda4162fdb0f5759318e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Provides a platform independent way to specify a signed 64-bit integer constant.  <a href="umachine_8h.html#a22369e5d04efcda4162fdb0f5759318e">More...</a><br /></td></tr>
<tr class="separator:a22369e5d04efcda4162fdb0f5759318e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a26a7bac63d90ef61175acb9f6fc4f2ca"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a26a7bac63d90ef61175acb9f6fc4f2ca">UINT64_C</a>(c)&#160;&#160;&#160;c ## ULL</td></tr>
<tr class="memdesc:a26a7bac63d90ef61175acb9f6fc4f2ca"><td class="mdescLeft">&#160;</td><td class="mdescRight">Provides a platform independent way to specify an unsigned 64-bit integer constant.  <a href="umachine_8h.html#a26a7bac63d90ef61175acb9f6fc4f2ca">More...</a><br /></td></tr>
<tr class="separator:a26a7bac63d90ef61175acb9f6fc4f2ca"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac1c596cb43b0e0da0ab1da5a20dbc502"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#ac1c596cb43b0e0da0ab1da5a20dbc502">U_INT64_MIN</a>&#160;&#160;&#160;((int64_t)(<a class="el" href="umachine_8h.html#a22369e5d04efcda4162fdb0f5759318e">INT64_C</a>(-9223372036854775807)-1))</td></tr>
<tr class="memdesc:ac1c596cb43b0e0da0ab1da5a20dbc502"><td class="mdescLeft">&#160;</td><td class="mdescRight">The smallest value a 64 bit signed integer can hold.  <a href="umachine_8h.html#ac1c596cb43b0e0da0ab1da5a20dbc502">More...</a><br /></td></tr>
<tr class="separator:ac1c596cb43b0e0da0ab1da5a20dbc502"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ae3e790bebd3de6c1c2010ca8e766517d"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#ae3e790bebd3de6c1c2010ca8e766517d">U_INT64_MAX</a>&#160;&#160;&#160;((int64_t)(<a class="el" href="umachine_8h.html#a22369e5d04efcda4162fdb0f5759318e">INT64_C</a>(9223372036854775807)))</td></tr>
<tr class="memdesc:ae3e790bebd3de6c1c2010ca8e766517d"><td class="mdescLeft">&#160;</td><td class="mdescRight">The largest value a 64 bit signed integer can hold.  <a href="umachine_8h.html#ae3e790bebd3de6c1c2010ca8e766517d">More...</a><br /></td></tr>
<tr class="separator:ae3e790bebd3de6c1c2010ca8e766517d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a476c17527f46de7a96942841fb87f770"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a476c17527f46de7a96942841fb87f770">U_UINT64_MAX</a>&#160;&#160;&#160;((uint64_t)(<a class="el" href="umachine_8h.html#a26a7bac63d90ef61175acb9f6fc4f2ca">UINT64_C</a>(18446744073709551615)))</td></tr>
<tr class="memdesc:a476c17527f46de7a96942841fb87f770"><td class="mdescLeft">&#160;</td><td class="mdescRight">The largest value a 64 bit unsigned integer can hold.  <a href="umachine_8h.html#a476c17527f46de7a96942841fb87f770">More...</a><br /></td></tr>
<tr class="separator:a476c17527f46de7a96942841fb87f770"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a369ea1fcd48fe78dbfc267086d746031"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a369ea1fcd48fe78dbfc267086d746031">U_DEFINE_FALSE_AND_TRUE</a>&#160;&#160;&#160;0</td></tr>
<tr class="memdesc:a369ea1fcd48fe78dbfc267086d746031"><td class="mdescLeft">&#160;</td><td class="mdescRight">Normally turns off defining macros FALSE=0 &amp; TRUE=1 in public ICU headers.  <a href="umachine_8h.html#a369ea1fcd48fe78dbfc267086d746031">More...</a><br /></td></tr>
<tr class="separator:a369ea1fcd48fe78dbfc267086d746031"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa8cecfc5c5c054d2875c03e77b7be15d"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#aa8cecfc5c5c054d2875c03e77b7be15d">TRUE</a>&#160;&#160;&#160;1</td></tr>
<tr class="memdesc:aa8cecfc5c5c054d2875c03e77b7be15d"><td class="mdescLeft">&#160;</td><td class="mdescRight">The TRUE value of a UBool.  <a href="umachine_8h.html#aa8cecfc5c5c054d2875c03e77b7be15d">More...</a><br /></td></tr>
<tr class="separator:aa8cecfc5c5c054d2875c03e77b7be15d"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aa93f0eb578d23995850d61f7d61c55c1"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#aa93f0eb578d23995850d61f7d61c55c1">FALSE</a>&#160;&#160;&#160;0</td></tr>
<tr class="memdesc:aa93f0eb578d23995850d61f7d61c55c1"><td class="mdescLeft">&#160;</td><td class="mdescRight">The FALSE value of a UBool.  <a href="umachine_8h.html#aa93f0eb578d23995850d61f7d61c55c1">More...</a><br /></td></tr>
<tr class="separator:aa93f0eb578d23995850d61f7d61c55c1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a949bcf5953a147ca7724397dfe230ee5"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a949bcf5953a147ca7724397dfe230ee5">U_SIZEOF_UCHAR</a>&#160;&#160;&#160;2</td></tr>
<tr class="memdesc:a949bcf5953a147ca7724397dfe230ee5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Number of bytes in a UChar (always 2).  <a href="umachine_8h.html#a949bcf5953a147ca7724397dfe230ee5">More...</a><br /></td></tr>
<tr class="separator:a949bcf5953a147ca7724397dfe230ee5"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8252a0feebf8351109bfcc38efc8ebf3"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a8252a0feebf8351109bfcc38efc8ebf3">U_CHAR16_IS_TYPEDEF</a>&#160;&#160;&#160;0</td></tr>
<tr class="memdesc:a8252a0feebf8351109bfcc38efc8ebf3"><td class="mdescLeft">&#160;</td><td class="mdescRight">If 1, then char16_t is a typedef and not a real type (yet)  <a href="umachine_8h.html#a8252a0feebf8351109bfcc38efc8ebf3">More...</a><br /></td></tr>
<tr class="separator:a8252a0feebf8351109bfcc38efc8ebf3"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a807436737b76a72b76ddf0b900304b4a"><td class="memItemLeft" align="right" valign="top">#define&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a807436737b76a72b76ddf0b900304b4a">U_SENTINEL</a>&#160;&#160;&#160;(-1)</td></tr>
<tr class="memdesc:a807436737b76a72b76ddf0b900304b4a"><td class="mdescLeft">&#160;</td><td class="mdescRight">This value is intended for sentinel values for APIs that (take or) return single code points (UChar32).  <a href="umachine_8h.html#a807436737b76a72b76ddf0b900304b4a">More...</a><br /></td></tr>
<tr class="separator:a807436737b76a72b76ddf0b900304b4a"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:a349ef00011f20ccd1d3b424445681aa5"><td class="memItemLeft" align="right" valign="top">typedef int8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a></td></tr>
<tr class="memdesc:a349ef00011f20ccd1d3b424445681aa5"><td class="mdescLeft">&#160;</td><td class="mdescRight">The ICU boolean type, a signed-byte integer.  <a href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">More...</a><br /></td></tr>
<tr class="separator:a349ef00011f20ccd1d3b424445681aa5"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6bb9fad572d65b305324ef288165e2ac"><td class="memItemLeft" align="right" valign="top">typedef char16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a></td></tr>
<tr class="memdesc:a6bb9fad572d65b305324ef288165e2ac"><td class="mdescLeft">&#160;</td><td class="mdescRight">The base type for UTF-16 code units and pointers.  <a href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">More...</a><br /></td></tr>
<tr class="separator:a6bb9fad572d65b305324ef288165e2ac"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a85b92f7aa77a10e854b4cbff55a7a88c"><td class="memItemLeft" align="right" valign="top">typedef uint16_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a85b92f7aa77a10e854b4cbff55a7a88c">OldUChar</a></td></tr>
<tr class="memdesc:a85b92f7aa77a10e854b4cbff55a7a88c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Default ICU 58 definition of UChar.  <a href="umachine_8h.html#a85b92f7aa77a10e854b4cbff55a7a88c">More...</a><br /></td></tr>
<tr class="separator:a85b92f7aa77a10e854b4cbff55a7a88c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a09fff5c3b5a5b015324dc3ec3cf92809"><td class="memItemLeft" align="right" valign="top">typedef int32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="umachine_8h.html#a09fff5c3b5a5b015324dc3ec3cf92809">UChar32</a></td></tr>
<tr class="memdesc:a09fff5c3b5a5b015324dc3ec3cf92809"><td class="mdescLeft">&#160;</td><td class="mdescRight">Define UChar32 as a type for single Unicode code points.  <a href="umachine_8h.html#a09fff5c3b5a5b015324dc3ec3cf92809">More...</a><br /></td></tr>
<tr class="separator:a09fff5c3b5a5b015324dc3ec3cf92809"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Basic types and constants for UTF. </p>
<h2>Basic types and constants for UTF </h2>
<p>This file defines basic types and constants for <a class="el" href="utf_8h.html" title="C API: Code point macros.">utf.h</a> to be platform-independent. <a class="el" href="umachine_8h.html" title="Basic types and constants for UTF.">umachine.h</a> and <a class="el" href="utf_8h.html" title="C API: Code point macros.">utf.h</a> are included into <a class="el" href="utypes_8h.html" title="Basic definitions for ICU, for both C and C++ APIs.">utypes.h</a> to provide all the general definitions for ICU. All of these definitions used to be in <a class="el" href="utypes_8h.html" title="Basic definitions for ICU, for both C and C++ APIs.">utypes.h</a> before the UTF-handling macros made this unmaintainable. </p>

<p class="definition">Definition in file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
<a id="aa93f0eb578d23995850d61f7d61c55c1"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa93f0eb578d23995850d61f7d61c55c1">&#9670;&nbsp;</a></span>FALSE</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define FALSE&#160;&#160;&#160;0</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>The FALSE value of a UBool. </p>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000099">Deprecated:</a></b></dt><dd>ICU 68 Use standard "false" instead. </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00283">283</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

</div>
</div>
<a id="ac58f2c111cc9989c86db2a7dc4fd84ca"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac58f2c111cc9989c86db2a7dc4fd84ca">&#9670;&nbsp;</a></span>INT16_MAX</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define INT16_MAX&#160;&#160;&#160;((int16_t)(32767))</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>The largest value a 16 bit signed integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002344">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00182">182</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

</div>
</div>
<a id="ad4e9955955b27624963643eac448118a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad4e9955955b27624963643eac448118a">&#9670;&nbsp;</a></span>INT16_MIN</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define INT16_MIN&#160;&#160;&#160;((int16_t)(-32767-1))</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>The smallest value a 16 bit signed integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002341">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00169">169</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

</div>
</div>
<a id="a181807730d4a375f848ba139813ce04f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a181807730d4a375f848ba139813ce04f">&#9670;&nbsp;</a></span>INT32_MAX</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define INT32_MAX&#160;&#160;&#160;((int32_t)(2147483647))</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>The largest value a 32 bit signed integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002345">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00186">186</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

</div>
</div>
<a id="a688eb21a22db27c2b2bd5836943cdcbe"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a688eb21a22db27c2b2bd5836943cdcbe">&#9670;&nbsp;</a></span>INT32_MIN</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define INT32_MIN&#160;&#160;&#160;((int32_t)(-2147483647-1))</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>The smallest value a 32 bit signed integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002342">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00173">173</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

</div>
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<a id="a22369e5d04efcda4162fdb0f5759318e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a22369e5d04efcda4162fdb0f5759318e">&#9670;&nbsp;</a></span>INT64_C</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define INT64_C</td>
          <td>(</td>
          <td class="paramtype">&#160;</td>
          <td class="paramname">c</td><td>)</td>
          <td>&#160;&#160;&#160;c ## LL</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>Provides a platform independent way to specify a signed 64-bit integer constant. </p>
<p>note: may be wrong for some 64 bit platforms - ensure your compiler provides INT64_C </p><dl class="stable"><dt><b><a class="el" href="stable.html#_stable002349">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00211">211</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

</div>
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<a id="aaf7f29f45f1a513b4748a4e5014ddf6a"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aaf7f29f45f1a513b4748a4e5014ddf6a">&#9670;&nbsp;</a></span>INT8_MAX</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
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          <td class="memname">#define INT8_MAX&#160;&#160;&#160;((int8_t)(127))</td>
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      </table>
</div><div class="memdoc">

<p>The largest value an 8 bit signed integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002343">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00178">178</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<a id="aadcf2a81af243df333b31efa6461ab8e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aadcf2a81af243df333b31efa6461ab8e">&#9670;&nbsp;</a></span>INT8_MIN</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define INT8_MIN&#160;&#160;&#160;((int8_t)(-128))</td>
        </tr>
      </table>
</div><div class="memdoc">

<p>The smallest value an 8 bit signed integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002340">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00165">165</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<a id="aa8cecfc5c5c054d2875c03e77b7be15d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa8cecfc5c5c054d2875c03e77b7be15d">&#9670;&nbsp;</a></span>TRUE</h2>

<div class="memitem">
<div class="memproto">
      <table class="memname">
        <tr>
          <td class="memname">#define TRUE&#160;&#160;&#160;1</td>
        </tr>
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</div><div class="memdoc">

<p>The TRUE value of a UBool. </p>
<dl class="deprecated"><dt><b><a class="el" href="deprecated.html#_deprecated000098">Deprecated:</a></b></dt><dd>ICU 68 Use standard "true" instead. </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00275">275</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a1f2a107433f276c69c8f8ab826fe6374">&#9670;&nbsp;</a></span>U_ATTRIBUTE_DEPRECATED</h2>

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<p>This is used for GCC specific attributes. </p>
<dl class="internal"><dt><b><a class="el" href="internal.html#_internal000140">Internal:</a></b></dt><dd>Do not use.</dd></dl>
<p>This API is for internal use only. </p>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00105">105</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a676114b1a64bb7c2de15c919a00b28df">&#9670;&nbsp;</a></span>U_CAPI</h2>

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          <td class="memname">#define U_CAPI&#160;&#160;&#160;<a class="el" href="umachine_8h.html#af702d65cba0638c5a8194cccc8d7c39e">U_CFUNC</a> <a class="el" href="platform_8h.html#a7d78411159504c2d6770763f924a1792">U_EXPORT</a></td>
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<p>This is used to declare a function as a public ICU C API. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002339">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00110">110</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a82c853d86803ab75c89267be54fbac6a">&#9670;&nbsp;</a></span>U_CDECL_BEGIN</h2>

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<p>This is used to begin a declaration of a library private ICU C API. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002337">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00085">85</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a1a820e5c6cbe8ac1742b654e6bf9ed7d">&#9670;&nbsp;</a></span>U_CDECL_END</h2>

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<p>This is used to end a declaration of a library private ICU C API. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002338">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00086">86</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#af702d65cba0638c5a8194cccc8d7c39e">&#9670;&nbsp;</a></span>U_CFUNC</h2>

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<p>This is used in a declaration of a library private ICU C function. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002336">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00084">84</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a8252a0feebf8351109bfcc38efc8ebf3">&#9670;&nbsp;</a></span>U_CHAR16_IS_TYPEDEF</h2>

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<p>If 1, then char16_t is a typedef and not a real type (yet) </p>
<dl class="internal"><dt><b><a class="el" href="internal.html#_internal000144">Internal:</a></b></dt><dd>Do not use.</dd></dl>
<p>This API is for internal use only. </p>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00342">342</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a369ea1fcd48fe78dbfc267086d746031">&#9670;&nbsp;</a></span>U_DEFINE_FALSE_AND_TRUE</h2>

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<p>Normally turns off defining macros FALSE=0 &amp; TRUE=1 in public ICU headers. </p>
<p>These obsolete macros sometimes break compilation of other code that defines enum constants or similar with these names. C++ has long defined bool/false/true. C99 also added definitions for these, although as macros; see stdbool.h.</p>
<p>You may transitionally define U_DEFINE_FALSE_AND_TRUE=1 if you need time to migrate code.</p>
<dl class="internal"><dt><b><a class="el" href="internal.html#_internal000143">Internal:</a></b></dt><dd>Do not use. This API is for internal use only. ICU 68 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00265">265</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ae3e790bebd3de6c1c2010ca8e766517d">&#9670;&nbsp;</a></span>U_INT64_MAX</h2>

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          <td class="memname">#define U_INT64_MAX&#160;&#160;&#160;((int64_t)(<a class="el" href="umachine_8h.html#a22369e5d04efcda4162fdb0f5759318e">INT64_C</a>(9223372036854775807)))</td>
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<p>The largest value a 64 bit signed integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002352">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00227">227</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ac1c596cb43b0e0da0ab1da5a20dbc502">&#9670;&nbsp;</a></span>U_INT64_MIN</h2>

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          <td class="memname">#define U_INT64_MIN&#160;&#160;&#160;((int64_t)(<a class="el" href="umachine_8h.html#a22369e5d04efcda4162fdb0f5759318e">INT64_C</a>(-9223372036854775807)-1))</td>
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<p>The smallest value a 64 bit signed integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002351">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00223">223</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a807436737b76a72b76ddf0b900304b4a">&#9670;&nbsp;</a></span>U_SENTINEL</h2>

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<p>This value is intended for sentinel values for APIs that (take or) return single code points (UChar32). </p>
<p>It is outside of the Unicode code point range 0..0x10ffff.</p>
<p>For example, a "done" or "error" value in a new API could be indicated with U_SENTINEL.</p>
<p>ICU APIs designed before ICU 2.4 usually define service-specific "done" values, mostly 0xffff. Those may need to be distinguished from actual U+ffff text contents by calling functions like CharacterIterator::hasNext() or UnicodeString::length().</p>
<dl class="section return"><dt>Returns</dt><dd>-1 </dd></dl>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="umachine_8h.html#a09fff5c3b5a5b015324dc3ec3cf92809" title="Define UChar32 as a type for single Unicode code points.">UChar32</a> </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002359">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00455">455</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a949bcf5953a147ca7724397dfe230ee5">&#9670;&nbsp;</a></span>U_SIZEOF_UCHAR</h2>

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<p>Number of bytes in a UChar (always 2). </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002355">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00330">330</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a476c17527f46de7a96942841fb87f770">&#9670;&nbsp;</a></span>U_UINT64_MAX</h2>

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<p>The largest value a 64 bit unsigned integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002353">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00231">231</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a3ea490c9b3617d4479bd80ef93cd5602">&#9670;&nbsp;</a></span>UINT16_MAX</h2>

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<p>The largest value a 16 bit unsigned integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002347">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00195">195</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ab5eb23180f7cc12b7d6c04a8ec067fdd">&#9670;&nbsp;</a></span>UINT32_MAX</h2>

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<p>The largest value a 32 bit unsigned integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002348">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00199">199</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a26a7bac63d90ef61175acb9f6fc4f2ca">&#9670;&nbsp;</a></span>UINT64_C</h2>

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<p>Provides a platform independent way to specify an unsigned 64-bit integer constant. </p>
<p>note: may be wrong for some 64 bit platforms - ensure your compiler provides UINT64_C </p><dl class="stable"><dt><b><a class="el" href="stable.html#_stable002350">Stable:</a></b></dt><dd>ICU 2.8 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00219">219</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#aeb4e270a084ee26fe73e799861bd0252">&#9670;&nbsp;</a></span>UINT8_MAX</h2>

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<p>The largest value an 8 bit unsigned integer can hold. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002346">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00191">191</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#abfdc26d020b4fab3ed5ca2b98fe5df43">&#9670;&nbsp;</a></span>UPRV_BLOCK_MACRO_BEGIN</h2>

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<p>Defined as the "do" keyword by default. </p>
<dl class="internal"><dt><b><a class="el" href="internal.html#_internal000141">Internal:</a></b></dt><dd>Do not use. This API is for internal use only. </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00147">147</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a983e6cc57f8c1b0c5b9ad9ceb290418a">&#9670;&nbsp;</a></span>UPRV_BLOCK_MACRO_END</h2>

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<p>Defined as "while (false)" by default. </p>
<dl class="internal"><dt><b><a class="el" href="internal.html#_internal000142">Internal:</a></b></dt><dd>Do not use. This API is for internal use only. </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00156">156</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="groupheader">Typedef Documentation</h2>
<a id="a85b92f7aa77a10e854b4cbff55a7a88c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a85b92f7aa77a10e854b4cbff55a7a88c">&#9670;&nbsp;</a></span>OldUChar</h2>

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<p>Default ICU 58 definition of UChar. </p>
<p>A base type for UTF-16 code units and pointers. Unsigned 16-bit integer.</p>
<p>Define OldUChar to be wchar_t if that is 16 bits wide. If wchar_t is not 16 bits wide, then define UChar to be uint16_t.</p>
<p>This makes the definition of OldUChar platform-dependent but allows direct string type compatibility with platforms with 16-bit wchar_t types.</p>
<p>This is how UChar was defined in ICU 58, for transition convenience. Exception: ICU 58 UChar was defined to UCHAR_TYPE if that macro was defined. The current UChar responds to UCHAR_TYPE but OldUChar does not.</p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002357">Stable:</a></b></dt><dd>ICU 59 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00415">415</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a349ef00011f20ccd1d3b424445681aa5">&#9670;&nbsp;</a></span>UBool</h2>

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<p>The ICU boolean type, a signed-byte integer. </p>
<p>ICU-specific for historical reasons: The C and C++ standards used to not define type bool. Also provides a fixed type definition, as opposed to type bool whose details (e.g., sizeof) may vary by compiler and between C and C++.</p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002354">Stable:</a></b></dt><dd>ICU 2.0 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00247">247</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a6bb9fad572d65b305324ef288165e2ac">&#9670;&nbsp;</a></span>UChar</h2>

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<p>The base type for UTF-16 code units and pointers. </p>
<p>Unsigned 16-bit integer. Starting with ICU 59, C++ API uses char16_t directly, while C API continues to use UChar.</p>
<p>UChar is configurable by defining the macro UCHAR_TYPE on the preprocessor or compiler command line: -DUCHAR_TYPE=uint16_t or -DUCHAR_TYPE=wchar_t (if U_SIZEOF_WCHAR_T==2) etc. (The UCHAR_TYPE can also be #defined earlier in this file, for outside the ICU library code.) This is for transitional use from application code that uses uint16_t or wchar_t for UTF-16.</p>
<p>The default is UChar=char16_t.</p>
<p>C++11 defines char16_t as bit-compatible with uint16_t, but as a distinct type.</p>
<p>In C, char16_t is a simple typedef of uint_least16_t. ICU requires uint_least16_t=uint16_t for data memory mapping. On macOS, char16_t is not available because the <a class="el" href="uchar_8h.html" title="C API: Unicode Properties.">uchar.h</a> standard header is missing.</p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002356">Stable:</a></b></dt><dd>ICU 4.4 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00386">386</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a09fff5c3b5a5b015324dc3ec3cf92809">&#9670;&nbsp;</a></span>UChar32</h2>

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          <td class="memname">typedef int32_t <a class="el" href="umachine_8h.html#a09fff5c3b5a5b015324dc3ec3cf92809">UChar32</a></td>
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<p>Define UChar32 as a type for single Unicode code points. </p>
<p>UChar32 is a signed 32-bit integer (same as int32_t).</p>
<p>The Unicode code point range is 0..0x10ffff. All other values (negative or &gt;=0x110000) are illegal as Unicode code points. They may be used as sentinel values to indicate "done", "error" or similar non-code point conditions.</p>
<p>Before ICU 2.4 (Jitterbug 2146), UChar32 was defined to be wchar_t if that is 32 bits wide (wchar_t may be signed or unsigned) or else to be uint32_t. That is, the definition of UChar32 was platform-dependent.</p>
<dl class="section see"><dt>See also</dt><dd><a class="el" href="umachine_8h.html#a807436737b76a72b76ddf0b900304b4a" title="This value is intended for sentinel values for APIs that (take or) return single code points (UChar32...">U_SENTINEL</a> </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable002358">Stable:</a></b></dt><dd>ICU 2.4 </dd></dl>

<p class="definition">Definition at line <a class="el" href="umachine_8h_source.html#l00435">435</a> of file <a class="el" href="umachine_8h_source.html">umachine.h</a>.</p>

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