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<html><!-- #BeginTemplate "/Templates/tmpl.dwt" --><!-- DW6 --><head><!-- #BeginEditable "doctitle" --> <title>PTypes: streams: outstm</title><!-- #EndEditable --> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link rel="stylesheet" href="styles.css"></head><body bgcolor="#FFFFFF" leftmargin="40" marginwidth="40"><p><a href="../index.html"><img src="title-20.png" width="253" height="39" alt="C++ Portable Types Library (PTypes) Version 2.0" border="0"></a> <hr size="1" noshade><!-- #BeginEditable "body" --> <p class="hpath"><a href="index.html">Top</a>: <a href="streams.html">Streams</a>: outstm </p><blockquote> <pre class="lang">#include <pstreams.h>class outstm: iobase { void putf(const char* fmt, ...); void put(char c); void put(const string& str); void puteol(); int write(const char* buf, int count); void flush(); bool get/set_flusheol(bool);}</pre></blockquote><p>This class implements the basic functionality of output streams. <span class="lang">Outstm</span> is derived from <a href="streams.iobase.html">iobase</a> and inherits all its public methods and properties.</p><p>End-of-line sequences are not translated when you send data through the output methods. To write an end-of-line sequence appropriate to the given operating environment use <span class="lang">puteol()</span> instead.</p><p><span class="def">void outstm::putf(const char* fmt, ...)</span> is a printf-style output method. PTypes supports a subset of format specifiers common to all platforms: <blank>, '#', '+' and '-' formatting flags, 'L', 'h', 'l' and 'll' format modifiers, and the following standard format specifiers: <span class="lang">cdiouxXeEfgGps</span>. In addition, PTypes supports a format specifier <span class="lang">a</span> for IP addresses (<span class="lang">ipaddress</span> type) and also <span class="lang">t</span> and <span class="lang">T</span> for timestamps (<span class="lang">datetime</span> type). Note that some compilers require to explicitly cast <span class="lang">ipaddress</span> arguments to <span class="lang">long</span> type, and also <span class="lang">string</span> arguments to <span class="lang">const char*</span> (or <span class="lang">pconst</span>).</p><p><span class="def">void outstm::put(char c)</span> writes the character <span class="lang">c</span> to the stream.</p><p><span class="def">void outstm::put(const string& str)</span> writes the string <span class="lang">str</span> to the stream.</p><p><span class="def">void outstm::puteol()</span> writes an end-of-line sequence to the stream. The actual sequence depends on the platform the library was compiled on. May flush data if the property <span class="lang">flusheol</span> is set to <span class="lang">true</span>.</p><p><span class="def">int outstm::write(const char* buf, int count)</span> writes <span class="lang">count</span> bytes from the buffer <span class="lang">buf</span> to the stream.</p><p><span class="def">void outstm::flush()</span> writes the remaining data in the buffer to the media, if any. This method is called automatically when the stream is being closed.</p><p><span class="def"> bool outstm::get/set_flusheol(bool)</span> -- set this property to true if you want each line to be written to the media or communication stream immediately. Default is <span class="lang">false</span>.</p><p class="seealso">See also: <a href="streams.iobase.html">iobase</a>, <a href="streams.instm.html">instm</a>, <a href="streams.errors.html">Error handling</a></p><!-- #EndEditable --><hr size="1"><a href="../index.html" class="ns">PTypes home</a></body><!-- #EndTemplate --></html>⌨️ 快捷键说明
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