| //Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc. |
| |
| //Distributed under the Boost Software License, Version 1.0. (See accompanying |
| //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| |
| //This example shows how to add arbitrary data to active exception objects. |
| |
| #include <boost/exception/all.hpp> |
| #include <boost/shared_ptr.hpp> |
| #include <stdio.h> |
| #include <errno.h> |
| |
| // |
| |
| struct file_read_error: virtual boost::exception { }; |
| |
| void |
| file_read( FILE * f, void * buffer, size_t size ) |
| { |
| if( size!=fread(buffer,1,size,f) ) |
| throw file_read_error() << boost::errinfo_errno(errno); |
| } |
| |
| // |
| |
| boost::shared_ptr<FILE> file_open( char const * file_name, char const * mode ); |
| void file_read( FILE * f, void * buffer, size_t size ); |
| |
| void |
| parse_file( char const * file_name ) |
| { |
| boost::shared_ptr<FILE> f = file_open(file_name,"rb"); |
| assert(f); |
| try |
| { |
| char buf[1024]; |
| file_read( f.get(), buf, sizeof(buf) ); |
| } |
| catch( |
| boost::exception & e ) |
| { |
| e << boost::errinfo_file_name(file_name); |
| throw; |
| } |
| } |