98 lines
6.0 KiB
HTML
98 lines
6.0 KiB
HTML
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<title>errinfo_api_function</title>
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<a href="http://www.boost.org"><img style="border:0" src="../../../boost.png" alt="Boost" width="277" height="86"/></a>
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<h1>Boost Exception</h1>
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<!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. -->
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<!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
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<!-- file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) -->
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<div class="RenoIncludeDIV"><div class="RenoAutoDIV"><h3>errinfo_api_function</h3>
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</div>
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<div class="RenoIncludeDIV"><p><span class="RenoEscape">#<!--<wiki>`#</wiki>--></span>include <<span class="RenoLink"><a href="boost_exception_errinfo_api_function_hpp.html">boost/exception/errinfo_api_function.hpp</a></span>></p>
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<div class="RenoIncludeDIV"><pre>#include <<span class="RenoLink"><a href="boost_exception_error_info_hpp.html">boost/exception/error_info.hpp</a></span>>
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namespace
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boost
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{
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<span class="RenoIncludeSPAN"> <span class="RenoIncludeSPAN">typedef <span class="RenoLink"><a href="error_info.html">error_info</a></span><struct errinfo_api_function_,char const *> <span class="RenoLink">errinfo_api_function</span>;</span></span>
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}</pre>
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</div></div><p>This type is designed to be used as a standard <span class="RenoLink"><a href="error_info.html">error_info</a></span> instance for transporting the name of a relevant API function (which does not use exceptions to report errors) in exceptions deriving from boost::<span class="RenoLink"><a href="exception.html">exception</a></span>.</p>
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<h3>Example:</h3>
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<div class="RenoIncludeDIV"><pre>#include <<span class="RenoLink"><a href="boost_exception_errinfo_api_function_hpp.html">boost/exception/errinfo_api_function.hpp</a></span>>
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#include <<span class="RenoLink"><a href="boost_exception_errinfo_at_line_hpp.html">boost/exception/errinfo_at_line.hpp</a></span>>
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#include <<span class="RenoLink"><a href="boost_exception_errinfo_errno_hpp.html">boost/exception/errinfo_errno.hpp</a></span>>
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#include <<span class="RenoLink"><a href="boost_exception_errinfo_file_handle_hpp.html">boost/exception/errinfo_file_handle.hpp</a></span>>
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#include <<span class="RenoLink"><a href="boost_exception_errinfo_file_name_hpp.html">boost/exception/errinfo_file_name.hpp</a></span>>
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#include <<span class="RenoLink"><a href="boost_exception_errinfo_file_open_mode_hpp.html">boost/exception/errinfo_file_open_mode.hpp</a></span>>
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#include <<span class="RenoLink"><a href="boost_exception_info_hpp.html">boost/exception/info.hpp</a></span>>
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#include <<span class="RenoLink"><a href="boost_throw_exception_hpp.html">boost/throw_exception.hpp</a></span>>
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#include <boost/shared_ptr.hpp>
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#include <boost/weak_ptr.hpp>
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#include <stdio.h>
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#include <errno.h>
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#include <exception>
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struct error : virtual std::exception, virtual boost::<span class="RenoLink"><a href="exception.html">exception</a></span> { };
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struct file_error : virtual error { };
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struct file_open_error: virtual file_error { };
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struct file_read_error: virtual file_error { };
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boost::shared_ptr<FILE>
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open_file( char const * file, char const * mode )
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{
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if( FILE * f=fopen(file,mode) )
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return boost::shared_ptr<FILE>(f,fclose);
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else
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<span class="RenoLink"><a href="BOOST_THROW_EXCEPTION.html">BOOST_THROW_EXCEPTION</a></span>(
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file_open_error() <<
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boost::<span class="RenoLink">errinfo_api_function</span>("fopen") <<
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boost::<span class="RenoLink"><a href="errinfo_errno.html">errinfo_errno</a></span>(errno) <<
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boost::<span class="RenoLink"><a href="errinfo_file_name.html">errinfo_file_name</a></span>(file) <<
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boost::<span class="RenoLink"><a href="errinfo_file_open_mode.html">errinfo_file_open_mode</a></span>(mode) );
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}
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size_t
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read_file( boost::shared_ptr<FILE> const & f, void * buf, size_t size )
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{
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size_t nr=fread(buf,1,size,f.get());
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if( ferror(f.get()) )
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<span class="RenoLink"><a href="BOOST_THROW_EXCEPTION.html">BOOST_THROW_EXCEPTION</a></span>(
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file_read_error() <<
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boost::<span class="RenoLink">errinfo_api_function</span>("fread") <<
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boost::<span class="RenoLink"><a href="errinfo_errno.html">errinfo_errno</a></span>(errno) <<
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boost::<span class="RenoLink"><a href="errinfo_file_handle.html">errinfo_file_handle</a></span>(f) );
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return nr;
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}</pre>
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</div></div><div class="RenoAutoDIV"><div class="RenoHR"><hr/></div>
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See also: <span class="RenoPageList"><a href="boost_exception_errinfo_api_function_hpp.html">boost/exception/errinfo_api_function.hpp</a> | <a href="frequently_asked_questions.html">Frequently Asked Questions</a></span>
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<!-- Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. -->
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<!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
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<small>Copyright (c) 2006-2009 by Emil Dotchevski and Reverge Studios, Inc.<br/>
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Distributed under the <a href="http://www.boost.org/LICENSE_1_0.txt">Boost Software License, Version 1.0</a>.</small>
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