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<title>std::basic_streambuf&lt;CharT,Traits&gt;::pubseekoff, std::basic_streambuf&lt;CharT,Traits&gt;::seekoff</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::basic_streambuf&lt;CharT,Traits&gt;::</span>pubseekoff, <span style="font-size:0.7em; line-height:130%">std::basic_streambuf&lt;CharT,Traits&gt;::</span>seekoff</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-io.html">io</a>&lrm; | <a href="cpp-io-basic_streambuf.html">basic streambuf</a></span></div>
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<div><span class="mw-geshi cpp source-cpp">pos_type pubseekoff<span class="br0">(</span> off_type off, <a href="cpp-io-ios_base-seekdir.html"><span class="kw1702">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">seekdir</span></span></a> dir,<br />
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;<a href="cpp-io-ios_base-openmode.html"><span class="kw1671">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">openmode</span></span></a> which <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span> <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td>(1)</td>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw1">protected</span><span class="sy4">:</span><br /></span>
<p><span class="kw1">virtual</span> pos_type seekoff<span class="br0">(</span> off_type off, <a href="cpp-io-ios_base-seekdir.html"><span class="kw1702">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">seekdir</span></span></a> dir,<br /></p>
&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; <a href="cpp-io-ios_base-openmode.html"><span class="kw1671">std::<span class="me2">ios_base</span><span class="sy4">::</span><span class="me2">openmode</span></span></a> which <span class="sy1">=</span> ios_base<span class="sy4">::</span><span class="me2">in</span> <span class="sy3">|</span> ios_base<span class="sy4">::</span><span class="me2">out</span> <span class="br0">)</span><span class="sy4">;</span></div>
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<td>(2)</td>
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<p>&#30456;&#23545;&#26576;&#20854;&#20182;&#20301;&#32622;&#65292;&#35774;&#32622;&#36755;&#20837;&#21644;/&#25110;&#36755;&#20986;&#24207;&#21015;&#30340;&#20301;&#32622;&#25351;&#31034;&#22120;&#12290;</p>
<p>1) &#35843;&#29992;&#26368;&#32456;&#23548;&#20986;&#31867;&#30340; <code>seekoff(off, dir, which)</code></p>
<p>2) &#27492;&#20989;&#25968;&#30340;&#22522;&#31867;&#29256;&#26412;&#26080;&#25928;&#26524;&#12290;&#23548;&#20986;&#31867;&#21487;&#35206;&#20889;&#27492;&#20989;&#25968;&#20197;&#20801;&#35768;&#20301;&#32622;&#25351;&#31034;&#22120;&#30340;&#30456;&#23545;&#23547;&#20301;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>off</td>
<td>-</td>
<td>&#35201;&#35774;&#32622;&#20301;&#32622;&#25351;&#31034;&#22120;&#21040;&#30340;&#30456;&#23545;&#20301;&#32622;&#12290;</td>
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<td>dir</td>
<td>-</td>
<td>&#23450;&#20041;&#35201;&#24212;&#29992;&#30456;&#23545;&#20559;&#31227;&#21040;&#30340;&#22522;&#20301;&#32622;&#12290;&#23427;&#33021;&#20026;&#19979;&#21015;&#24120;&#37327;&#20043;&#19968;&#65306;
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<td>&#24120;&#37327;</td>
<td>&#35299;&#37322;</td>
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<td><a href="cpp-io-ios_base-seekdir.html"><tt>beg</tt></a></td>
<td>&#27969;&#30340;&#24320;&#22987;</td>
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<td><a href="cpp-io-ios_base-seekdir.html"><tt>end</tt></a></td>
<td>&#27969;&#30340;&#32467;&#23614;</td>
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<td><a href="cpp-io-ios_base-seekdir.html"><tt>cur</tt></a></td>
<td>&#27969;&#20301;&#32622;&#25351;&#31034;&#22120;&#30340;&#24403;&#21069;&#20301;&#32622;</td>
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<td>which</td>
<td>-</td>
<td>&#23450;&#20041;&#36755;&#20837;&#21644;/&#25110;&#36755;&#20986;&#24207;&#21015;&#20309;&#32773;&#26377;&#24433;&#21709;&#12290;&#23427;&#33021;&#20026;&#19979;&#21015;&#24120;&#37327;&#20043;&#19968;&#25110;&#20854;&#32452;&#21512;&#65306;
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<td>&#24120;&#37327;</td>
<td>&#35299;&#37322;</td>
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<td><a href="cpp-io-ios_base-openmode.html"><tt>in</tt></a></td>
<td>&#24433;&#21709;&#36755;&#20837;&#24207;&#21015;</td>
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<td><a href="cpp-io-ios_base-openmode.html"><tt>out</tt></a></td>
<td>&#24433;&#21709;&#36755;&#20986;&#24207;&#21015;</td>
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<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p>&#24182;&#38750;&#25152;&#26377;&#21442;&#25968;&#32452;&#21512;&#37117;&#21487;&#20197;&#21512;&#27861;&#65292;&#32454;&#33410;&#35265; <code>seekoff</code> &#30340;&#23548;&#20986;&#31867;&#29256;&#26412;&#12290;</p>
<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>1) <code>seekoff(off, dir, which)</code> &#30340;&#36820;&#22238;&#20540;</p>
<p>2) &#20301;&#32622;&#25351;&#31034;&#22120;&#25152;&#23450;&#20041;&#30340;&#32467;&#26524;&#32477;&#23545;&#20301;&#32622;&#12290;&#22522;&#31867;&#29256;&#26412;&#36820;&#22238; <span class="t-c"><span class="mw-geshi cpp source-cpp">pos_type<span class="br0">(</span>off_type<span class="br0">(</span><span class="sy2">-</span><span class="nu0">1</span><span class="br0">)</span><span class="br0">)</span></span></span> &#12290;</p>
<h3><span class="mw-headline" id=".E7.A4.BA.E4.BE.8B">&#31034;&#20363;</span></h3>
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<td class="mbox-text" style="">&#26412;&#33410;&#26410;&#23436;&#25104;<br />
&#21407;&#22240;&#65306;&#26242;&#26080;&#31034;&#20363;</td>
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<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-io-basic_streambuf-pubseekpos.html"><span class="t-lines"><span>pubseekpos</span></span></a></div>
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<td>&#35843;&#29992; <span class="t-c"><span class="mw-geshi cpp source-cpp">seekpos<span class="br0">(</span><span class="br0">)</span></span></span><br />
<span class="t-mark">(&#20844;&#24320;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_filebuf-seekoff.html"><span class="t-lines"><span>seekoff</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
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<td>&#29992;&#30456;&#23545;&#23547;&#22336;&#37325;&#23547;&#20301;&#25991;&#20214;&#20301;&#32622;<br />
<span class="t-mark">(<code>std::basic_filebuf&lt;CharT,Traits&gt;</code> &#30340;&#34394;&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="cpp-io-basic_stringbuf-seekoff.html"><span class="t-lines"><span>seekoff</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
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<td>&#29992;&#30456;&#23545;&#23547;&#22336;&#65292;&#37325;&#23450;&#20301;&#36755;&#20837;&#24207;&#21015;&#12289;&#36755;&#20986;&#24207;&#21015;&#25110;&#20004;&#32773;&#20013;&#30340;&#19979;&#19968;&#20301;&#32622;&#25351;&#38024;<br />
<span class="t-mark">(<code>std::basic_stringbuf&lt;CharT,Traits,Allocator&gt;</code> &#30340;&#34394;&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
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<div class="t-dsc-member-div">
<div><a href="cpp-io-strstreambuf-seekoff.html"><span class="t-lines"><span>seekoff</span></span></a></div>
<div><span class="t-lines"><span><span class="t-cmark">[&#34394;]</span></span></span></div>
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<td>&#29992;&#30456;&#23545;&#23547;&#22336;&#37325;&#23547;&#20301;&#36755;&#20837;&#24207;&#21015;&#12289;&#36755;&#20986;&#24207;&#21015;&#25110;&#20004;&#32773;&#20013;&#30340;&#19979;&#19968;&#20301;&#32622;&#25351;&#38024;<br />
<span class="t-mark">(<code>std::strstreambuf</code> &#30340;&#34394;&#21463;&#20445;&#25252;&#25104;&#21592;&#20989;&#25968;)</span></td>
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