-<?xml version="1.0" encoding="UTF-8" standalone="no"?>
-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
-<html xmlns="http://www.w3.org/1999/xhtml"><head><title>Chapter 28. Input and Output</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.76.1"/><meta name="keywords" content=" ISO C++ , library "/><meta name="keywords" content=" ISO C++ , runtime , library "/><link rel="home" href="../index.html" title="The GNU C++ Library"/><link rel="up" href="extensions.html" title="Part III. Extensions"/><link rel="prev" href="ext_iterators.html" title="Chapter 27. Iterators"/><link rel="next" href="ext_demangling.html" title="Chapter 29. Demangling"/></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 28. Input and Output</th></tr><tr><td align="left"><a accesskey="p" href="ext_iterators.html">Prev</a> </td><th width="60%" align="center">Part III.
+<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Chapter 28. Input and Output</title><meta name="generator" content="DocBook XSL-NS Stylesheets V1.76.1"><meta name="keywords" content="
+ ISO C++
+ ,
+ library
+ "><meta name="keywords" content="
+ ISO C++
+ ,
+ runtime
+ ,
+ library
+ "><link rel="home" href="../index.html" title="The GNU C++ Library"><link rel="up" href="extensions.html" title="Part III. Extensions"><link rel="prev" href="ext_iterators.html" title="Chapter 27. Iterators"><link rel="next" href="ext_demangling.html" title="Chapter 29. Demangling"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Chapter 28. Input and Output</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ext_iterators.html">Prev</a> </td><th width="60%" align="center">Part III.
Extensions
-</th><td
align="right"> <a accesskey="n" href="ext_demangling.html">Next</a></td></tr></table><hr/></div><div class="chapter" title="Chapter 28. Input and Output"><div class="titlepage"><div><div><h2 class="title"><a id="manual.ext.io"/>Chapter 28. Input and Output</h2></div></div></div><div class="toc"><p><strong>Table of Contents</strong></p><dl><dt><span class="section"><a href="ext_io.html#manual.ext.io.filebuf_derived">Derived filebufs</a></span></dt></dl></div><p>
+</th><td
width="20%" align="right"> <a accesskey="n" href="ext_demangling.html">Next</a></td></tr></table><hr></div><div class="chapter" title="Chapter 28. Input and Output"><div class="titlepage"><div><div><h2 class="title"><a name="manual.ext.io"></a>Chapter 28. Input and Output</h2></div></div></div><div class="toc"><p><b>Table of Contents</b></p><dl><dt><span class="section"><a href="ext_io.html#manual.ext.io.filebuf_derived">Derived filebufs</a></span></dt></dl></div><p>
Extensions allowing <code class="code">filebuf</code>s to be constructed from
"C" types like FILE*s and file descriptors.
- </p><div class="section" title="Derived filebufs"><div class="titlepage"><div><div><h2 class="title"
><a id="manual.ext.io.filebuf_derived"/>Derived filebufs</h2></div></div></div><p>The v2 library included non-standard extensions to construct
+ </p><div class="section" title="Derived filebufs"><div class="titlepage"><div><div><h2 class="title"
style="clear: both"><a name="manual.ext.io.filebuf_derived"></a>Derived filebufs</h2></div></div></div><p>The v2 library included non-standard extensions to construct
<code class="code">std::filebuf</code>s from C stdio types such as
<code class="code">FILE*</code>s and POSIX file descriptors.
Today the recommended way to use stdio types with libstdc++
IOStreams is via the <code class="code">stdio_filebuf</code> class (see below),
but earlier releases provided slightly different mechanisms.
- </p><div class="itemizedlist"><ul class="itemizedlist"><li class="listitem"><p>3.0.x <code class="code">filebuf</code>s have another ctor with this signature:
+ </p><div class="itemizedlist"><ul class="itemizedlist"
type="disc"><li class="listitem"><p>3.0.x <code class="code">filebuf</code>s have another ctor with this signature:
<code class="code">basic_filebuf(__c_file_type*, ios_base::openmode, int_type);
</code>
This comes in very handy in a number of places, such as
attaching Unix sockets, pipes, and anything else which uses file
descriptors, into the IOStream buffering classes. The three
arguments are as follows:
- </p><div class="itemizedlist"><ul class="itemizedlist"><li class="listitem"><p><code class="code">__c_file_type* F </code>
+ </p><div class="itemizedlist"><ul class="itemizedlist"
type="circle"><li class="listitem"><p><code class="code">__c_file_type* F </code>
// the __c_file_type typedef usually boils down to stdio's FILE
</p></li><li class="listitem"><p><code class="code">ios_base::openmode M </code>
// same as all the other uses of openmode
the <code class="code">fd()</code> function were removed from the standard
filebuf. Instead, <code class="code"><ext/stdio_filebuf.h></code> contains
a derived class called
- <a class="link" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a00074.html"><code class="code">__gnu_cxx::stdio_filebuf</code></a>.
+ <a class="link" href="http://gcc.gnu.org/onlinedocs/libstdc++/latest-doxygen/a00074.html" target="_top"><code class="code">__gnu_cxx::stdio_filebuf</code></a>.
This class can be constructed from a C <code class="code">FILE*</code> or a file
descriptor, and provides the <code class="code">fd()</code> function.
- </p></li></ul></div></div></div><div class="navfooter"><hr/><table width="100%" summary="Navigation footer"><tr><td align="left"><a accesskey="p" href="ext_iterators.html">Prev</a> </td><td align="center"><a accesskey="u" href="extensions.html">Up</a></td><td align="right"> <a accesskey="n" href="ext_demangling.html">Next</a></td></tr><tr><td align="left" valign="top">Chapter 27. Iterators </td><td align="center"><a accesskey="h" href="../index.html">Home</a></td><td align="right" valign="top"> Chapter 29. Demangling</td></tr></table></div></body></html>
+ </p></li></ul></div></div></div><div class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="ext_iterators.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="extensions.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="ext_demangling.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">Chapter 27. Iterators </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Chapter 29. Demangling</td></tr></table></div></body></html>
projects / gcc.git / blobdiff