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< title > errinfo_api_function< / title >
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< h1 > Boost Exception< / h1 >
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<!-- Copyright (c) 2006 - 2009 Emil Dotchevski and Reverge Studios, Inc. -->
<!-- Distributed under the Boost Software License, Version 1.0. (See accompanying -->
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< div class = "RenoIncludeDIV" > < div class = "RenoAutoDIV" > < h3 > errinfo_api_function< / h3 >
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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 >
< div class = "RenoIncludeDIV" > < pre > #include < < span class = "RenoLink" > < a href = "boost_exception_error_info_hpp.html" > boost/exception/error_info.hpp< / a > < / span > >
namespace
boost
{
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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 >
< / 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 >
< h3 > Example:< / h3 >
< 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 > >
#include < < span class = "RenoLink" > < a href = "boost_exception_errinfo_at_line_hpp.html" > boost/exception/errinfo_at_line.hpp< / a > < / span > >
#include < < span class = "RenoLink" > < a href = "boost_exception_errinfo_errno_hpp.html" > boost/exception/errinfo_errno.hpp< / a > < / span > >
#include < < span class = "RenoLink" > < a href = "boost_exception_errinfo_file_handle_hpp.html" > boost/exception/errinfo_file_handle.hpp< / a > < / span > >
#include < < span class = "RenoLink" > < a href = "boost_exception_errinfo_file_name_hpp.html" > boost/exception/errinfo_file_name.hpp< / a > < / span > >
#include < < span class = "RenoLink" > < a href = "boost_exception_errinfo_file_open_mode_hpp.html" > boost/exception/errinfo_file_open_mode.hpp< / a > < / span > >
#include < < span class = "RenoLink" > < a href = "boost_exception_info_hpp.html" > boost/exception/info.hpp< / a > < / span > >
#include < < span class = "RenoLink" > < a href = "boost_throw_exception_hpp.html" > boost/throw_exception.hpp< / a > < / span > >
#include < boost/shared_ptr.hpp>
#include < boost/weak_ptr.hpp>
#include < stdio.h>
#include < errno.h>
#include < exception>
struct error : virtual std::exception, virtual boost::< span class = "RenoLink" > < a href = "exception.html" > exception< / a > < / span > { };
struct file_error : virtual error { };
struct file_open_error: virtual file_error { };
struct file_read_error: virtual file_error { };
boost::shared_ptr< FILE>
open_file( char const * file, char const * mode )
{
if( FILE * f=fopen(file,mode) )
return boost::shared_ptr< FILE> (f,fclose);
else
< span class = "RenoLink" > < a href = "BOOST_THROW_EXCEPTION.html" > BOOST_THROW_EXCEPTION< / a > < / span > (
file_open_error() < <
boost::< span class = "RenoLink" > errinfo_api_function< / span > ("fopen") < <
boost::< span class = "RenoLink" > < a href = "errinfo_errno.html" > errinfo_errno< / a > < / span > (errno) < <
boost::< span class = "RenoLink" > < a href = "errinfo_file_name.html" > errinfo_file_name< / a > < / span > (file) < <
boost::< span class = "RenoLink" > < a href = "errinfo_file_open_mode.html" > errinfo_file_open_mode< / a > < / span > (mode) );
}
size_t
read_file( boost::shared_ptr< FILE> const & f, void * buf, size_t size )
{
size_t nr=fread(buf,1,size,f.get());
if( ferror(f.get()) )
< span class = "RenoLink" > < a href = "BOOST_THROW_EXCEPTION.html" > BOOST_THROW_EXCEPTION< / a > < / span > (
file_read_error() < <
boost::< span class = "RenoLink" > errinfo_api_function< / span > ("fread") < <
boost::< span class = "RenoLink" > < a href = "errinfo_errno.html" > errinfo_errno< / a > < / span > (errno) < <
boost::< span class = "RenoLink" > < a href = "errinfo_file_handle.html" > errinfo_file_handle< / a > < / span > (f) );
return nr;
}< / pre >
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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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< small > Copyright (c) 2006-2009 by Emil Dotchevski and Reverge Studios, Inc.< br / >
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