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WIOTools.cpp
1 //---------------------------------------------------------------------------
2 //
3 // Project: OpenWalnut ( http://www.openwalnut.org )
4 //
5 // Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS
6 // For more information see http://www.openwalnut.org/copying
7 //
8 // This file is part of OpenWalnut.
9 //
10 // OpenWalnut is free software: you can redistribute it and/or modify
11 // it under the terms of the GNU Lesser General Public License as published by
12 // the Free Software Foundation, either version 3 of the License, or
13 // (at your option) any later version.
14 //
15 // OpenWalnut is distributed in the hope that it will be useful,
16 // but WITHOUT ANY WARRANTY; without even the implied warranty of
17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 // GNU Lesser General Public License for more details.
19 //
20 // You should have received a copy of the GNU Lesser General Public License
21 // along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
22 //
23 //---------------------------------------------------------------------------
24 
25 #include <fstream>
26 #include <streambuf>
27 #include <string>
28 
29 // Use filesystem version 2 for compatibility with newer boost versions.
30 #ifndef BOOST_FILESYSTEM_VERSION
31  #define BOOST_FILESYSTEM_VERSION 2
32 #endif
33 #include <boost/filesystem.hpp>
34 
35 #include "exceptions/WFileNotFound.h"
36 #include "exceptions/WFileOpenFailed.h"
37 #include "WIOTools.h"
38 
39 std::string readFileIntoString( const std::string& name )
40 {
41  return readFileIntoString( boost::filesystem::path( name ) );
42 }
43 
44 std::string readFileIntoString( const boost::filesystem::path& path )
45 {
46  std::string filename = path.file_string();
47  std::ifstream input( filename.c_str() );
48  if( !input.is_open() )
49  {
50  throw WFileNotFound( std::string( "The file \"" ) + boost::filesystem::complete( path ).file_string() + std::string( "\" does not exist." ) );
51  }
52 
53  // preallocate space for the string.
54  std::string str;
55  input.seekg( 0, std::ios::end );
56  str.reserve( input.tellg() );
57  input.seekg( 0, std::ios::beg );
58 
59  str.assign( ( std::istreambuf_iterator< char >( input ) ), std::istreambuf_iterator< char >() );
60 
61  input.close();
62  return str;
63 }
64 
65 void writeStringIntoFile( const std::string& name, const std::string& content )
66 {
67  writeStringIntoFile( boost::filesystem::path( name ), content );
68 }
69 
70 void writeStringIntoFile( const boost::filesystem::path& path, const std::string& content )
71 {
72  std::ofstream outfile( path.file_string().c_str() );
73  if( !outfile.is_open() )
74  {
75  throw WFileOpenFailed( "The file \"" + boost::filesystem::complete( path ).file_string() + "\" could not be opened." );
76  }
77 
78  outfile << content << std::flush;
79  outfile.close();
80 }
81 
82 boost::filesystem::path tempFileName()
83 {
84  // REGARDING THE COMPILER WARNING
85  // 1. mkstemp is only available for POSIX systems
86  // 2. reason: the warning generated here is due to a race condition
87  // while tmpnam invents the fileName it may be created by another process
88  // 3. file names like "/tmp/pansen" or "C:\pansen" are platform dependent
89  return boost::filesystem::path( std::string( std::tmpnam( NULL ) ) );
90 }
91