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<div id="projectname">ICU 4.8.1.1
 <span id="projectnumber">4.8.1.1</span>
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<a href="#pub-methods">Public Member Functions</a> </div>
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<div class="title">ByteSink Class Reference</div> </div>
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<p>A <a class="el" href="classByteSink.html" title="A ByteSink can be filled with bytes.">ByteSink</a> can be filled with bytes.
<a href="classByteSink.html#details">More...</a></p>
<p><code>#include <<a class="el" href="bytestream_8h_source.html">bytestream.h</a>></code></p>
<div class="dynheader">
Inheritance diagram for ByteSink:</div>
<div class="dyncontent">
<div class="center">
<img src="classByteSink.png" usemap="#ByteSink_map" alt=""/>
<map id="ByteSink_map" name="ByteSink_map">
<area href="classUMemory.html" title="UMemory is the common ICU base class." alt="UMemory" shape="rect" coords="0,0,144,24"/>
<area href="classCheckedArrayByteSink.html" title="Implementation of ByteSink that writes to a flat byte array, with bounds-checking: This sink will not..." alt="CheckedArrayByteSink" shape="rect" coords="0,112,144,136"/>
</map>
</div></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:a6247961c1b73f897b276a540cd0288f9"><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="classByteSink.html#a6247961c1b73f897b276a540cd0288f9">ByteSink</a> ()</td></tr>
<tr class="memdesc:a6247961c1b73f897b276a540cd0288f9"><td class="mdescLeft"> </td><td class="mdescRight">Default constructor. <a href="#a6247961c1b73f897b276a540cd0288f9"></a><br/></td></tr>
<tr class="memitem:ac2e07401e236bcb8545ce9ee96d801fc"><td class="memItemLeft" align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classByteSink.html#ac2e07401e236bcb8545ce9ee96d801fc">~ByteSink</a> ()</td></tr>
<tr class="memdesc:ac2e07401e236bcb8545ce9ee96d801fc"><td class="mdescLeft"> </td><td class="mdescRight">Virtual destructor. <a href="#ac2e07401e236bcb8545ce9ee96d801fc"></a><br/></td></tr>
<tr class="memitem:a1f04f7474f4822c29b3a20fde509a3d8"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classByteSink.html#a1f04f7474f4822c29b3a20fde509a3d8">Append</a> (const char *bytes, <a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> n)=0</td></tr>
<tr class="memdesc:a1f04f7474f4822c29b3a20fde509a3d8"><td class="mdescLeft"> </td><td class="mdescRight">Append "bytes[0,n-1]" to this. <a href="#a1f04f7474f4822c29b3a20fde509a3d8"></a><br/></td></tr>
<tr class="memitem:afbff3e7aca11c652464153b955071201"><td class="memItemLeft" align="right" valign="top">virtual char * </td><td class="memItemRight" valign="bottom"><a class="el" href="classByteSink.html#afbff3e7aca11c652464153b955071201">GetAppendBuffer</a> (<a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> min_capacity, <a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> desired_capacity_hint, char *scratch, <a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> scratch_capacity, <a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> *result_capacity)</td></tr>
<tr class="memdesc:afbff3e7aca11c652464153b955071201"><td class="mdescLeft"> </td><td class="mdescRight">Returns a writable buffer for appending and writes the buffer's capacity to *result_capacity. <a href="#afbff3e7aca11c652464153b955071201"></a><br/></td></tr>
<tr class="memitem:aa73d9401de89bca953f70eacc0ac9e45"><td class="memItemLeft" align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classByteSink.html#aa73d9401de89bca953f70eacc0ac9e45">Flush</a> ()</td></tr>
<tr class="memdesc:aa73d9401de89bca953f70eacc0ac9e45"><td class="mdescLeft"> </td><td class="mdescRight">Flush internal buffers. <a href="#aa73d9401de89bca953f70eacc0ac9e45"></a><br/></td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2><a name="inherited"></a>
Additional Inherited Members</h2></td></tr>
<tr class="inherit_header pub_static_methods_classUMemory"><td colspan="2" onclick="javascript:toggleInherit('pub_static_methods_classUMemory')"><img src="closed.png" alt="-"/> Static Public Member Functions inherited from <a class="el" href="classUMemory.html">UMemory</a></td></tr>
<tr class="memitem:a309b19b5777e2840b85b202aef5a54fb inherit pub_static_methods_classUMemory"><td class="memItemLeft" align="right" valign="top">static void * </td><td class="memItemRight" valign="bottom"><a class="el" href="classUMemory.html#a309b19b5777e2840b85b202aef5a54fb">operator new</a> (size_t size)</td></tr>
<tr class="memdesc:a309b19b5777e2840b85b202aef5a54fb inherit pub_static_methods_classUMemory"><td class="mdescLeft"> </td><td class="mdescRight">Override for ICU4C C++ memory management. <a href="#a309b19b5777e2840b85b202aef5a54fb"></a><br/></td></tr>
<tr class="memitem:a4d0df3571728e7b8a823dbbea6e9b5c5 inherit pub_static_methods_classUMemory"><td class="memItemLeft" align="right" valign="top">static void * </td><td class="memItemRight" valign="bottom"><a class="el" href="classUMemory.html#a4d0df3571728e7b8a823dbbea6e9b5c5">operator new[]</a> (size_t size)</td></tr>
<tr class="memdesc:a4d0df3571728e7b8a823dbbea6e9b5c5 inherit pub_static_methods_classUMemory"><td class="mdescLeft"> </td><td class="mdescRight">Override for ICU4C C++ memory management. <a href="#a4d0df3571728e7b8a823dbbea6e9b5c5"></a><br/></td></tr>
<tr class="memitem:adcda65a58813749f8f45c5e6c1ed37e1 inherit pub_static_methods_classUMemory"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classUMemory.html#adcda65a58813749f8f45c5e6c1ed37e1">operator delete</a> (void *p)</td></tr>
<tr class="memdesc:adcda65a58813749f8f45c5e6c1ed37e1 inherit pub_static_methods_classUMemory"><td class="mdescLeft"> </td><td class="mdescRight">Override for ICU4C C++ memory management. <a href="#adcda65a58813749f8f45c5e6c1ed37e1"></a><br/></td></tr>
<tr class="memitem:a7602a7a8c6fdff21d9fbecea4d899333 inherit pub_static_methods_classUMemory"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classUMemory.html#a7602a7a8c6fdff21d9fbecea4d899333">operator delete[]</a> (void *p)</td></tr>
<tr class="memdesc:a7602a7a8c6fdff21d9fbecea4d899333 inherit pub_static_methods_classUMemory"><td class="mdescLeft"> </td><td class="mdescRight">Override for ICU4C C++ memory management. <a href="#a7602a7a8c6fdff21d9fbecea4d899333"></a><br/></td></tr>
<tr class="memitem:a43b5221fe429f77230b2040f8724c154 inherit pub_static_methods_classUMemory"><td class="memItemLeft" align="right" valign="top">static void * </td><td class="memItemRight" valign="bottom"><a class="el" href="classUMemory.html#a43b5221fe429f77230b2040f8724c154">operator new</a> (size_t, void *ptr)</td></tr>
<tr class="memdesc:a43b5221fe429f77230b2040f8724c154 inherit pub_static_methods_classUMemory"><td class="mdescLeft"> </td><td class="mdescRight">Override for ICU4C C++ memory management for STL. <a href="#a43b5221fe429f77230b2040f8724c154"></a><br/></td></tr>
<tr class="memitem:a9b746b0cdb49c8f8907773002ea5c4ea inherit pub_static_methods_classUMemory"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="classUMemory.html#a9b746b0cdb49c8f8907773002ea5c4ea">operator delete</a> (void *, void *)</td></tr>
<tr class="memdesc:a9b746b0cdb49c8f8907773002ea5c4ea inherit pub_static_methods_classUMemory"><td class="mdescLeft"> </td><td class="mdescRight">Override for ICU4C C++ memory management for STL. <a href="#a9b746b0cdb49c8f8907773002ea5c4ea"></a><br/></td></tr>
</table>
<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>A <a class="el" href="classByteSink.html" title="A ByteSink can be filled with bytes.">ByteSink</a> can be filled with bytes. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000035">Stable:</a></b></dt><dd>ICU 4.2 </dd></dl>
<p>Definition at line <a class="el" href="bytestream_8h_source.html#l00048">48</a> of file <a class="el" href="bytestream_8h_source.html">bytestream.h</a>.</p>
</div><hr/><h2>Constructor & Destructor Documentation</h2>
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<td class="memname">ByteSink::ByteSink </td>
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<p>Default constructor. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000037">Stable:</a></b></dt><dd>ICU 4.2 </dd></dl>
<p>Definition at line <a class="el" href="bytestream_8h_source.html#l00054">54</a> of file <a class="el" href="bytestream_8h_source.html">bytestream.h</a>.</p>
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<td class="memname">virtual ByteSink::~ByteSink </td>
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<p>Virtual destructor. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000038">Stable:</a></b></dt><dd>ICU 4.2 </dd></dl>
<p>Definition at line <a class="el" href="bytestream_8h_source.html#l00059">59</a> of file <a class="el" href="bytestream_8h_source.html">bytestream.h</a>.</p>
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<hr/><h2>Member Function Documentation</h2>
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<td class="memname">virtual void ByteSink::Append </td>
<td>(</td>
<td class="paramtype">const char * </td>
<td class="paramname"><em>bytes</em>, </td>
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<td class="paramtype"><a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> </td>
<td class="paramname"><em>n</em> </td>
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<p>Append "bytes[0,n-1]" to this. </p>
<dl class="params"><dt>Parameters:</dt><dd>
<table class="params">
<tr><td class="paramname">bytes</td><td>the pointer to the bytes </td></tr>
<tr><td class="paramname">n</td><td>the number of bytes; must be non-negative </td></tr>
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<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000039">Stable:</a></b></dt><dd>ICU 4.2 </dd></dl>
<p>Implemented in <a class="el" href="classCheckedArrayByteSink.html#ace4a9f8d0ac6f44f6cfbab126cec36fc">CheckedArrayByteSink</a>.</p>
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<td class="memname">virtual void ByteSink::Flush </td>
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<p>Flush internal buffers. </p>
<p>Some byte sinks use internal buffers or provide buffering and require calling <a class="el" href="classByteSink.html#aa73d9401de89bca953f70eacc0ac9e45" title="Flush internal buffers.">Flush()</a> at the end of the stream. The <a class="el" href="classByteSink.html" title="A ByteSink can be filled with bytes.">ByteSink</a> should be ready for further <a class="el" href="classByteSink.html#a1f04f7474f4822c29b3a20fde509a3d8" title="Append "bytes[0,n-1]" to this.">Append()</a> calls after <a class="el" href="classByteSink.html#aa73d9401de89bca953f70eacc0ac9e45" title="Flush internal buffers.">Flush()</a>. The default implementation of <a class="el" href="classByteSink.html#aa73d9401de89bca953f70eacc0ac9e45" title="Flush internal buffers.">Flush()</a> does nothing. </p>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000041">Stable:</a></b></dt><dd>ICU 4.2 </dd></dl>
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<td class="memname">virtual char* ByteSink::GetAppendBuffer </td>
<td>(</td>
<td class="paramtype"><a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> </td>
<td class="paramname"><em>min_capacity</em>, </td>
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<td class="paramtype"><a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> </td>
<td class="paramname"><em>desired_capacity_hint</em>, </td>
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<td class="paramtype">char * </td>
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<td class="paramtype"><a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> </td>
<td class="paramname"><em>scratch_capacity</em>, </td>
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<td class="paramtype"><a class="el" href="pwin32_8h.html#ab1967d8591af1a4e48c37fd2b0f184d0">int32_t</a> * </td>
<td class="paramname"><em>result_capacity</em> </td>
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<p>Returns a writable buffer for appending and writes the buffer's capacity to *result_capacity. </p>
<p>Guarantees *result_capacity>=min_capacity. May return a pointer to the caller-owned scratch buffer which must have scratch_capacity>=min_capacity. The returned buffer is only valid until the next operation on this <a class="el" href="classByteSink.html" title="A ByteSink can be filled with bytes.">ByteSink</a>.</p>
<p>After writing at most *result_capacity bytes, call <a class="el" href="classByteSink.html#a1f04f7474f4822c29b3a20fde509a3d8" title="Append "bytes[0,n-1]" to this.">Append()</a> with the pointer returned from this function and the number of bytes written. Many <a class="el" href="classByteSink.html#a1f04f7474f4822c29b3a20fde509a3d8" title="Append "bytes[0,n-1]" to this.">Append()</a> implementations will avoid copying bytes if this function returned an internal buffer.</p>
<p>Partial usage example: int32_t capacity; char* buffer = sink->GetAppendBuffer(..., &capacity); ... Write n bytes into buffer, with n <= capacity. sink->Append(buffer, n); In many implementations, that call to Append will avoid copying bytes.</p>
<p>If the <a class="el" href="classByteSink.html" title="A ByteSink can be filled with bytes.">ByteSink</a> allocates or reallocates an internal buffer, it should use the desired_capacity_hint if appropriate. If a caller cannot provide a reasonable guess at the desired capacity, it should pass desired_capacity_hint=0.</p>
<p>If a non-scratch buffer is returned, the caller may only pass a prefix to it to <a class="el" href="classByteSink.html#a1f04f7474f4822c29b3a20fde509a3d8" title="Append "bytes[0,n-1]" to this.">Append()</a>. That is, it is not correct to pass an interior pointer to <a class="el" href="classByteSink.html#a1f04f7474f4822c29b3a20fde509a3d8" title="Append "bytes[0,n-1]" to this.">Append()</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">min_capacity</td><td>required minimum capacity of the returned buffer; must be non-negative </td></tr>
<tr><td class="paramname">desired_capacity_hint</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">scratch_capacity</td><td>capacity of the scratch buffer </td></tr>
<tr><td class="paramname">result_capacity</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 *result_capacity>=min_capacity </dd></dl>
<dl class="stable"><dt><b><a class="el" href="stable.html#_stable000040">Stable:</a></b></dt><dd>ICU 4.2 </dd></dl>
<p>Reimplemented in <a class="el" href="classCheckedArrayByteSink.html#ac9b54c8bd9002d867648feb39b82a61c">CheckedArrayByteSink</a>.</p>
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li><a class="el" href="bytestream_8h_source.html">bytestream.h</a></li>
</ul>
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