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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">&#26631;&#20934;&#24211;&#22836;&#25991;&#20214;</span> &lt;streambuf&gt;</h1>
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<p>&#27492;&#22836;&#25991;&#20214;&#26159;<a href="cpp-io.html">&#36755;&#20837;/&#36755;&#20986;</a>&#24211;&#30340;&#19968;&#37096;&#20998;&#12290;</p>
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<h3><span class="mw-headline" id=".E7.B1.BB">&#31867;</span></h3>
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<div><a href="cpp-io-basic_streambuf.html"><span class="t-lines"><span>basic_streambuf</span></span></a></div>
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<td>&#25277;&#35937;&#21407;&#29983;&#35774;&#22791;<br />
<span class="t-mark">(&#31867;&#27169;&#26495;)</span></td>
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<td><code>streambuf</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_streambuf.html"><span class="kw1666">std::<span class="me2">basic_streambuf</span></span></a><span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
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<td><code>wstreambuf</code></td>
<td><span class="t-c"><span class="mw-geshi cpp source-cpp"><a href="cpp-io-basic_streambuf.html"><span class="kw1666">std::<span class="me2">basic_streambuf</span></span></a><span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span></span></span><br />
<span class="t-mark">(typedef)</span></td>
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<h3><span class="mw-headline" id=".E6.A6.82.E8.A6.81">&#27010;&#35201;</span></h3>
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_streambuf<span class="sy4">;</span>
<span class="kw1">using</span> streambuf <span class="sy1">=</span> basic_streambuf<span class="sy1">&lt;</span><span class="kw4">char</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="kw1">using</span> wstreambuf <span class="sy1">=</span> basic_streambuf<span class="sy1">&lt;</span><span class="kw4">wchar_t</span><span class="sy1">&gt;</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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<h4><span class="mw-headline" id=".E7.B1.BB.E6.A8.A1.E6.9D.BF_std::basic_streambuf">&#31867;&#27169;&#26495; <span class="t-lc"><a href="cpp-io-basic_streambuf.html">std::basic_streambuf</a></span></span></h4>
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<pre class="de1"><span class="kw1">namespace</span> std <span class="br0">{</span>
<span class="kw1">template</span><span class="sy1">&lt;</span><span class="kw1">class</span> CharT, <span class="kw1">class</span> Traits <span class="sy1">=</span> char_traits<span class="sy1">&lt;</span>CharT<span class="sy1">&gt;&gt;</span>
<span class="kw1">class</span> basic_streambuf <span class="br0">{</span>
<span class="kw1">public</span><span class="sy4">:</span>
<span class="kw1">using</span> char_type <span class="sy1">=</span> CharT<span class="sy4">;</span>
<span class="kw1">using</span> int_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">int_type</span><span class="sy4">;</span>
<span class="kw1">using</span> pos_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">pos_type</span><span class="sy4">;</span>
<span class="kw1">using</span> off_type <span class="sy1">=</span> <span class="kw1">typename</span> Traits<span class="sy4">::</span><span class="me2">off_type</span><span class="sy4">;</span>
<span class="kw1">using</span> traits_type <span class="sy1">=</span> Traits<span class="sy4">;</span>
<span class="kw1">virtual</span> ~basic_streambuf<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#26412;&#22320;&#29615;&#22659;</span>
locale pubimbue<span class="br0">(</span><span class="kw4">const</span> locale<span class="sy3">&amp;</span> loc<span class="br0">)</span><span class="sy4">;</span>
locale getloc<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="co1">// buffer and positioning</span>
basic_streambuf<span class="sy2">*</span> pubsetbuf<span class="br0">(</span>char_type<span class="sy2">*</span> s, streamsize n<span class="br0">)</span><span class="sy4">;</span>
pos_type pubseekoff<span class="br0">(</span>off_type off, ios_base<span class="sy4">::</span><span class="me2">seekdir</span> way,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> 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>
pos_type pubseekpos<span class="br0">(</span>pos_type sp,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> 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 class="kw4">int</span> pubsync<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#33719;&#21462;&#19982;&#25918;&#32622;&#21306;</span>
<span class="co1">// &#33719;&#21462;&#21306;</span>
streamsize in_avail<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
int_type snextc<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
int_type sbumpc<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
int_type sgetc<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
streamsize sgetn<span class="br0">(</span>char_type<span class="sy2">*</span> s, streamsize n<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#22238;&#25918;</span>
int_type sputbackc<span class="br0">(</span>char_type c<span class="br0">)</span><span class="sy4">;</span>
int_type sungetc<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25918;&#32622;&#21306;</span>
int_type sputc<span class="br0">(</span>char_type c<span class="br0">)</span><span class="sy4">;</span>
streamsize sputn<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s, streamsize n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">protected</span><span class="sy4">:</span>
basic_streambuf<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
basic_streambuf<span class="br0">(</span><span class="kw4">const</span> basic_streambuf<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
basic_streambuf<span class="sy3">&amp;</span> operator<span class="sy1">=</span><span class="br0">(</span><span class="kw4">const</span> basic_streambuf<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> swap<span class="br0">(</span>basic_streambuf<span class="sy3">&amp;</span> rhs<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#33719;&#21462;&#21306;&#35775;&#38382;</span>
char_type<span class="sy2">*</span> eback<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
char_type<span class="sy2">*</span> gptr<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
char_type<span class="sy2">*</span> egptr<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">void</span> gbump<span class="br0">(</span><span class="kw4">int</span> n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> setg<span class="br0">(</span>char_type<span class="sy2">*</span> gbeg, char_type<span class="sy2">*</span> gnext, char_type<span class="sy2">*</span> gend<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25918;&#32622;&#21306;&#35775;&#38382;</span>
char_type<span class="sy2">*</span> pbase<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
char_type<span class="sy2">*</span> pptr<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
char_type<span class="sy2">*</span> epptr<span class="br0">(</span><span class="br0">)</span> <span class="kw4">const</span><span class="sy4">;</span>
<span class="kw4">void</span> pbump<span class="br0">(</span><span class="kw4">int</span> n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw4">void</span> setp<span class="br0">(</span>char_type<span class="sy2">*</span> pbeg, char_type<span class="sy2">*</span> pend<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#34394;&#20989;&#25968;</span>
<span class="co1">// &#26412;&#22320;&#29615;&#22659;</span>
<span class="kw1">virtual</span> <span class="kw4">void</span> imbue<span class="br0">(</span><span class="kw4">const</span> locale<span class="sy3">&amp;</span> loc<span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// buffer management and positioning</span>
<span class="kw1">virtual</span> basic_streambuf<span class="sy2">*</span> setbuf<span class="br0">(</span>char_type<span class="sy2">*</span> s, streamsize n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">virtual</span> pos_type seekoff<span class="br0">(</span>off_type off, ios_base<span class="sy4">::</span><span class="me2">seekdir</span> way,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> 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 class="kw1">virtual</span> pos_type seekpos<span class="br0">(</span>pos_type sp,
ios_base<span class="sy4">::</span><span class="me2">openmode</span> 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 class="kw1">virtual</span> <span class="kw4">int</span> sync<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#33719;&#21462;&#21306;</span>
<span class="kw1">virtual</span> streamsize showmanyc<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">virtual</span> streamsize xsgetn<span class="br0">(</span>char_type<span class="sy2">*</span> s, streamsize n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">virtual</span> int_type underflow<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">virtual</span> int_type uflow<span class="br0">(</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#22238;&#25918;</span>
<span class="kw1">virtual</span> int_type pbackfail<span class="br0">(</span>int_type c <span class="sy1">=</span> Traits<span class="sy4">::</span><span class="me2">eof</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="co1">// &#25918;&#32622;&#21306;</span>
<span class="kw1">virtual</span> streamsize xsputn<span class="br0">(</span><span class="kw4">const</span> char_type<span class="sy2">*</span> s, streamsize n<span class="br0">)</span><span class="sy4">;</span>
<span class="kw1">virtual</span> int_type overflow<span class="br0">(</span>int_type c <span class="sy1">=</span> Traits<span class="sy4">::</span><span class="me2">eof</span><span class="br0">(</span><span class="br0">)</span><span class="br0">)</span><span class="sy4">;</span>
<span class="br0">}</span><span class="sy4">;</span>
<span class="br0">}</span></pre></div>
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