<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.11"/> <title>ICU 58.2: icu::Appendable Class Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">ICU 58.2  <span id="projectnumber">58.2</span> </div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.11 --> <div id="navrow1" class="tabs"> <ul class="tablist"> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="pages.html"><span>Related Pages</span></a></li> <li><a href="modules.html"><span>Modules</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li class="current"><a href="annotated.html"><span>Data Structures</span></a></li> <li><a href="files.html"><span>Files</span></a></li> </ul> </div> <div id="navrow2" class="tabs2"> <ul class="tablist"> <li><a href="annotated.html"><span>Data Structures</span></a></li> <li><a href="classes.html"><span>Data Structure Index</span></a></li> <li><a href="hierarchy.html"><span>Class Hierarchy</span></a></li> <li><a href="functions.html"><span>Data Fields</span></a></li> </ul> </div> <div id="nav-path" class="navpath"> <ul> <li class="navelem"><a class="el" href="namespaceicu.html">icu</a></li><li class="navelem"><a class="el" href="classicu_1_1Appendable.html">Appendable</a></li> </ul> </div> </div><!-- top --> <div class="header"> <div class="summary"> <a href="#pub-methods">Public Member Functions</a> </div> <div class="headertitle"> <div class="title">icu::Appendable Class Reference<span class="mlabels"><span class="mlabel">abstract</span></span></div> </div> </div><!--header--> <div class="contents"> <p>Base class for objects to which Unicode characters and strings can be appended. <a href="classicu_1_1Appendable.html#details">More...</a></p> <p><code>#include <<a class="el" href="appendable_8h_source.html">appendable.h</a>></code></p> <div class="dynheader"> Inheritance diagram for icu::Appendable:</div> <div class="dyncontent"> <div class="center"> <img src="classicu_1_1Appendable.png" usemap="#icu::Appendable_map" alt=""/> <map id="icu::Appendable_map" name="icu::Appendable_map"> <area href="classicu_1_1UObject.html" title="UObject is the common ICU "boilerplate" class. " alt="icu::UObject" shape="rect" coords="0,56,182,80"/> <area href="classicu_1_1UMemory.html" title="UMemory is the common ICU base class. " alt="icu::UMemory" shape="rect" coords="0,0,182,24"/> <area href="classicu_1_1UnicodeStringAppendable.html" title="An Appendable implementation which writes to a UnicodeString. " alt="icu::UnicodeStringAppendable" shape="rect" coords="0,168,182,192"/> </map> </div></div> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a> Public Member Functions</h2></td></tr> <tr class="memitem:aefa9d25b0e9f45239a7e9b1dc7135002"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1Appendable.html#aefa9d25b0e9f45239a7e9b1dc7135002">~Appendable</a> ()</td></tr> <tr class="memdesc:aefa9d25b0e9f45239a7e9b1dc7135002"><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <a href="#aefa9d25b0e9f45239a7e9b1dc7135002">More...</a><br /></td></tr> <tr class="separator:aefa9d25b0e9f45239a7e9b1dc7135002"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a5f306d09d7ae12718a86d6a55fcdb20e"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1Appendable.html#a5f306d09d7ae12718a86d6a55fcdb20e">appendCodeUnit</a> (<a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> c)=0</td></tr> <tr class="memdesc:a5f306d09d7ae12718a86d6a55fcdb20e"><td class="mdescLeft"> </td><td class="mdescRight">Appends a 16-bit code unit. <a href="#a5f306d09d7ae12718a86d6a55fcdb20e">More...</a><br /></td></tr> <tr class="separator:a5f306d09d7ae12718a86d6a55fcdb20e"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ab6ebdf003f35a831577f7a4a297b826e"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1Appendable.html#ab6ebdf003f35a831577f7a4a297b826e">appendCodePoint</a> (<a class="el" href="umachine_8h.html#a09fff5c3b5a5b015324dc3ec3cf92809">UChar32</a> c)</td></tr> <tr class="memdesc:ab6ebdf003f35a831577f7a4a297b826e"><td class="mdescLeft"> </td><td class="mdescRight">Appends a code point. <a href="#ab6ebdf003f35a831577f7a4a297b826e">More...</a><br /></td></tr> <tr class="separator:ab6ebdf003f35a831577f7a4a297b826e"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:aa53adceb8a3c9549b1d35f06f63c5c92"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1Appendable.html#aa53adceb8a3c9549b1d35f06f63c5c92">appendString</a> (const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *s, int32_t length)</td></tr> <tr class="memdesc:aa53adceb8a3c9549b1d35f06f63c5c92"><td class="mdescLeft"> </td><td class="mdescRight">Appends a string. <a href="#aa53adceb8a3c9549b1d35f06f63c5c92">More...</a><br /></td></tr> <tr class="separator:aa53adceb8a3c9549b1d35f06f63c5c92"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a1950ff25060fe2549160b65cb6a08f95"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1Appendable.html#a1950ff25060fe2549160b65cb6a08f95">reserveAppendCapacity</a> (int32_t appendCapacity)</td></tr> <tr class="memdesc:a1950ff25060fe2549160b65cb6a08f95"><td class="mdescLeft"> </td><td class="mdescRight">Tells the object that the caller is going to append roughly appendCapacity UChars. <a href="#a1950ff25060fe2549160b65cb6a08f95">More...</a><br /></td></tr> <tr class="separator:a1950ff25060fe2549160b65cb6a08f95"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a85c1af8466fa68893689e96dfa583801"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1Appendable.html#a85c1af8466fa68893689e96dfa583801">getAppendBuffer</a> (int32_t minCapacity, int32_t desiredCapacityHint, <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> *scratch, int32_t scratchCapacity, int32_t *resultCapacity)</td></tr> <tr class="memdesc:a85c1af8466fa68893689e96dfa583801"><td class="mdescLeft"> </td><td class="mdescRight">Returns a writable buffer for appending and writes the buffer's capacity to *resultCapacity. <a href="#a85c1af8466fa68893689e96dfa583801">More...</a><br /></td></tr> <tr class="separator:a85c1af8466fa68893689e96dfa583801"><td class="memSeparator" colspan="2"> </td></tr> <tr class="inherit_header pub_methods_classicu_1_1UObject"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classicu_1_1UObject')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="classicu_1_1UObject.html">icu::UObject</a></td></tr> <tr class="memitem:af10026497704f510d3d1f2eff50acb18 inherit pub_methods_classicu_1_1UObject"><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1UObject.html#af10026497704f510d3d1f2eff50acb18">~UObject</a> ()</td></tr> <tr class="memdesc:af10026497704f510d3d1f2eff50acb18 inherit pub_methods_classicu_1_1UObject"><td class="mdescLeft"> </td><td class="mdescRight">Destructor. <a href="#af10026497704f510d3d1f2eff50acb18">More...</a><br /></td></tr> <tr class="separator:af10026497704f510d3d1f2eff50acb18 inherit pub_methods_classicu_1_1UObject"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:a1aa93096e880907080b503ff1fb0f8bc inherit pub_methods_classicu_1_1UObject"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="uobject_8h.html#a22af10545208a455a6e884008df48e9f">UClassID</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classicu_1_1UObject.html#a1aa93096e880907080b503ff1fb0f8bc">getDynamicClassID</a> () const </td></tr> <tr class="memdesc:a1aa93096e880907080b503ff1fb0f8bc inherit pub_methods_classicu_1_1UObject"><td class="mdescLeft"> </td><td class="mdescRight">ICU4C "poor man's RTTI", returns a UClassID for the actual ICU class. <a href="#a1aa93096e880907080b503ff1fb0f8bc">More...</a><br /></td></tr> <tr class="separator:a1aa93096e880907080b503ff1fb0f8bc inherit pub_methods_classicu_1_1UObject"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> <div class="textblock"><p>Base class for objects to which Unicode characters and strings can be appended. </p> <p>Combines elements of Java <a class="el" href="classicu_1_1Appendable.html" title="Base class for objects to which Unicode characters and strings can be appended. ">Appendable</a> and ICU4C <a class="el" href="classicu_1_1ByteSink.html" title="A ByteSink can be filled with bytes. ">ByteSink</a>.</p> <p>This class can be used in APIs where it does not matter whether the actual destination is a <a class="el" href="classicu_1_1UnicodeString.html" title="UnicodeString is a string class that stores Unicode characters directly and provides similar function...">UnicodeString</a>, a UChar[] array, a <a class="el" href="classicu_1_1UnicodeSet.html" title="A mutable set of Unicode characters and multicharacter strings. ">UnicodeSet</a>, or any other object that receives and processes characters and/or strings.</p> <p>Implementation classes must implement at least <a class="el" href="classicu_1_1Appendable.html#a5f306d09d7ae12718a86d6a55fcdb20e" title="Appends a 16-bit code unit. ">appendCodeUnit(UChar)</a>. The base class provides default implementations for the other methods.</p> <p>The methods do not take UErrorCode parameters. If an error occurs (e.g., out-of-memory), in addition to returning FALSE from failing operations, the implementation must prevent unexpected behavior (e.g., crashes) from further calls and should make the error condition available separately (e.g., store a UErrorCode, make/keep a <a class="el" href="classicu_1_1UnicodeString.html" title="UnicodeString is a string class that stores Unicode characters directly and provides similar function...">UnicodeString</a> bogus). </p><dl class="stable"><dt><b><a class="el" href="stable.html#_stable000001">Stable:</a></b></dt><dd>ICU 4.8 </dd></dl> <p>Definition at line <a class="el" href="appendable_8h_source.html#l00051">51</a> of file <a class="el" href="appendable_8h_source.html">appendable.h</a>.</p> </div><h2 class="groupheader">Constructor & Destructor Documentation</h2> <a class="anchor" id="aefa9d25b0e9f45239a7e9b1dc7135002"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">icu::Appendable::~Appendable </td> <td>(</td> <td class="paramname"></td><td>)</td> <td></td> </tr> </table> </div><div class="memdoc"> <p>Destructor. </p> <dl class="stable"><dt><b><a class="el" href="stable.html#_stable000003">Stable:</a></b></dt><dd>ICU 4.8 </dd></dl> </div> </div> <h2 class="groupheader">Member Function Documentation</h2> <a class="anchor" id="ab6ebdf003f35a831577f7a4a297b826e"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">virtual <a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a> icu::Appendable::appendCodePoint </td> <td>(</td> <td class="paramtype"><a class="el" href="umachine_8h.html#a09fff5c3b5a5b015324dc3ec3cf92809">UChar32</a> </td> <td class="paramname"><em>c</em></td><td>)</td> <td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">virtual</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Appends a code point. </p> <p>The default implementation calls <a class="el" href="classicu_1_1Appendable.html#a5f306d09d7ae12718a86d6a55fcdb20e" title="Appends a 16-bit code unit. ">appendCodeUnit(UChar)</a> once or twice. </p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">c</td><td>code point 0..0x10ffff </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>TRUE if the operation succeeded </dd></dl> <dl class="stable"><dt><b><a class="el" href="stable.html#_stable000005">Stable:</a></b></dt><dd>ICU 4.8 </dd></dl> <p>Reimplemented in <a class="el" href="classicu_1_1UnicodeStringAppendable.html#a1239129bd9c1a04664f3a12dc9326543">icu::UnicodeStringAppendable</a>.</p> <p>Referenced by <a class="el" href="appendable_8h_source.html#l00160">icu::UnicodeStringAppendable::UnicodeStringAppendable()</a>.</p> </div> </div> <a class="anchor" id="a5f306d09d7ae12718a86d6a55fcdb20e"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">virtual <a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a> icu::Appendable::appendCodeUnit </td> <td>(</td> <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> </td> <td class="paramname"><em>c</em></td><td>)</td> <td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">pure virtual</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Appends a 16-bit code unit. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">c</td><td>code unit </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>TRUE if the operation succeeded </dd></dl> <dl class="stable"><dt><b><a class="el" href="stable.html#_stable000004">Stable:</a></b></dt><dd>ICU 4.8 </dd></dl> <p>Implemented in <a class="el" href="classicu_1_1UnicodeStringAppendable.html#a65514f405edf9920625e2cfd941798de">icu::UnicodeStringAppendable</a>.</p> <p>Referenced by <a class="el" href="appendable_8h_source.html#l00160">icu::UnicodeStringAppendable::UnicodeStringAppendable()</a>.</p> </div> </div> <a class="anchor" id="aa53adceb8a3c9549b1d35f06f63c5c92"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">virtual <a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a> icu::Appendable::appendString </td> <td>(</td> <td class="paramtype">const <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> * </td> <td class="paramname"><em>s</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int32_t </td> <td class="paramname"><em>length</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">virtual</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Appends a string. </p> <p>The default implementation calls <a class="el" href="classicu_1_1Appendable.html#a5f306d09d7ae12718a86d6a55fcdb20e" title="Appends a 16-bit code unit. ">appendCodeUnit(UChar)</a> for each code unit. </p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">s</td><td>string, must not be NULL if length!=0 </td></tr> <tr><td class="paramname">length</td><td>string length, or -1 if NUL-terminated </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>TRUE if the operation succeeded </dd></dl> <dl class="stable"><dt><b><a class="el" href="stable.html#_stable000006">Stable:</a></b></dt><dd>ICU 4.8 </dd></dl> <p>Reimplemented in <a class="el" href="classicu_1_1UnicodeStringAppendable.html#ab513d96030a182a23defbd705dc06d9d">icu::UnicodeStringAppendable</a>.</p> <p>Referenced by <a class="el" href="appendable_8h_source.html#l00160">icu::UnicodeStringAppendable::UnicodeStringAppendable()</a>.</p> </div> </div> <a class="anchor" id="a85c1af8466fa68893689e96dfa583801"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">virtual <a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a>* icu::Appendable::getAppendBuffer </td> <td>(</td> <td class="paramtype">int32_t </td> <td class="paramname"><em>minCapacity</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int32_t </td> <td class="paramname"><em>desiredCapacityHint</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a> * </td> <td class="paramname"><em>scratch</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int32_t </td> <td class="paramname"><em>scratchCapacity</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int32_t * </td> <td class="paramname"><em>resultCapacity</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">virtual</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Returns a writable buffer for appending and writes the buffer's capacity to *resultCapacity. </p> <p>Guarantees *resultCapacity>=minCapacity. May return a pointer to the caller-owned scratch buffer which must have scratchCapacity>=minCapacity. The returned buffer is only valid until the next operation on this <a class="el" href="classicu_1_1Appendable.html" title="Base class for objects to which Unicode characters and strings can be appended. ">Appendable</a>.</p> <p>After writing at most *resultCapacity UChars, call <a class="el" href="classicu_1_1Appendable.html#aa53adceb8a3c9549b1d35f06f63c5c92" title="Appends a string. ">appendString()</a> with the pointer returned from this function and the number of UChars written. Many <a class="el" href="classicu_1_1Appendable.html#aa53adceb8a3c9549b1d35f06f63c5c92" title="Appends a string. ">appendString()</a> implementations will avoid copying UChars if this function returned an internal buffer.</p> <p>Partial usage example: </p><div class="fragment"><div class="line">int32_t capacity;</div><div class="line"><a class="code" href="umachine_8h.html#a6bb9fad572d65b305324ef288165e2ac">UChar</a>* buffer = app.getAppendBuffer(..., &capacity);</div><div class="line">... Write n UChars into buffer, with n <= capacity.</div><div class="line">app.appendString(buffer, n);</div></div><!-- fragment --><p> In many implementations, that call to append will avoid copying UChars.</p> <p>If the <a class="el" href="classicu_1_1Appendable.html" title="Base class for objects to which Unicode characters and strings can be appended. ">Appendable</a> allocates or reallocates an internal buffer, it should use the desiredCapacityHint if appropriate. If a caller cannot provide a reasonable guess at the desired capacity, it should pass desiredCapacityHint=0.</p> <p>If a non-scratch buffer is returned, the caller may only pass a prefix to it to <a class="el" href="classicu_1_1Appendable.html#aa53adceb8a3c9549b1d35f06f63c5c92" title="Appends a string. ">appendString()</a>. That is, it is not correct to pass an interior pointer to <a class="el" href="classicu_1_1Appendable.html#aa53adceb8a3c9549b1d35f06f63c5c92" title="Appends a string. ">appendString()</a>.</p> <p>The default implementation always returns the scratch buffer.</p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">minCapacity</td><td>required minimum capacity of the returned buffer; must be non-negative </td></tr> <tr><td class="paramname">desiredCapacityHint</td><td>desired capacity of the returned buffer; must be non-negative </td></tr> <tr><td class="paramname">scratch</td><td>default caller-owned buffer </td></tr> <tr><td class="paramname">scratchCapacity</td><td>capacity of the scratch buffer </td></tr> <tr><td class="paramname">resultCapacity</td><td>pointer to an integer which will be set to the capacity of the returned buffer </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>a buffer with *resultCapacity>=minCapacity </dd></dl> <dl class="stable"><dt><b><a class="el" href="stable.html#_stable000008">Stable:</a></b></dt><dd>ICU 4.8 </dd></dl> <p>Reimplemented in <a class="el" href="classicu_1_1UnicodeStringAppendable.html#a1ed263623eca7d733e5672290e71f920">icu::UnicodeStringAppendable</a>.</p> <p>Referenced by <a class="el" href="appendable_8h_source.html#l00160">icu::UnicodeStringAppendable::UnicodeStringAppendable()</a>.</p> </div> </div> <a class="anchor" id="a1950ff25060fe2549160b65cb6a08f95"></a> <div class="memitem"> <div class="memproto"> <table class="mlabels"> <tr> <td class="mlabels-left"> <table class="memname"> <tr> <td class="memname">virtual <a class="el" href="umachine_8h.html#a349ef00011f20ccd1d3b424445681aa5">UBool</a> icu::Appendable::reserveAppendCapacity </td> <td>(</td> <td class="paramtype">int32_t </td> <td class="paramname"><em>appendCapacity</em></td><td>)</td> <td></td> </tr> </table> </td> <td class="mlabels-right"> <span class="mlabels"><span class="mlabel">virtual</span></span> </td> </tr> </table> </div><div class="memdoc"> <p>Tells the object that the caller is going to append roughly appendCapacity UChars. </p> <p>A subclass might use this to pre-allocate a larger buffer if necessary. The default implementation does nothing. (It always returns TRUE.) </p><dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">appendCapacity</td><td>estimated number of UChars that will be appended </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>TRUE if the operation succeeded </dd></dl> <dl class="stable"><dt><b><a class="el" href="stable.html#_stable000007">Stable:</a></b></dt><dd>ICU 4.8 </dd></dl> <p>Reimplemented in <a class="el" href="classicu_1_1UnicodeStringAppendable.html#ad5ac8185400cf6f9a4e93cd8c58bd18f">icu::UnicodeStringAppendable</a>.</p> <p>Referenced by <a class="el" href="appendable_8h_source.html#l00160">icu::UnicodeStringAppendable::UnicodeStringAppendable()</a>.</p> </div> </div> <hr/>The documentation for this class was generated from the following file:<ul> <li><a class="el" href="appendable_8h_source.html">appendable.h</a></li> </ul> </div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.11 </small></address> </body> </html>