argout.h
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1 /*
2  * Copyright (C) 2011 Tommi Maekitalo
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * As a special exception, you may use this file as part of a free
10  * software library without restriction. Specifically, if other files
11  * instantiate templates or use macros or inline functions from this
12  * file, or you compile this file and link it with other files to
13  * produce an executable, this file does not by itself cause the
14  * resulting executable to be covered by the GNU General Public
15  * License. This exception does not however invalidate any other
16  * reasons why the executable file might be covered by the GNU Library
17  * General Public License.
18  *
19  * This library is distributed in the hope that it will be useful,
20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
22  * Lesser General Public License for more details.
23  *
24  * You should have received a copy of the GNU Lesser General Public
25  * License along with this library; if not, write to the Free Software
26  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27  */
28 
29 #ifndef CXXTOOLS_STDOUT_H
30 #define CXXTOOLS_STDOUT_H
31 
32 #include <iostream>
33 #include <fstream>
34 #include <cxxtools/arg.h>
35 
36 namespace cxxtools
37 {
62  class ArgOut : public std::ostream
63  {
64  std::ofstream _ofile;
65 
66  void doInit(const Arg<const char*>& arg)
67  {
68  std::streambuf* buf;
69  if (arg.isSet())
70  {
71  _ofile.open(arg);
72  buf = _ofile.rdbuf();
73  }
74  else
75  buf = std::cout.rdbuf();
76  init(buf);
77  }
78 
79  public:
80  ArgOut(int& argc, char* argv[], char option)
81  {
82  Arg<const char*> ofile(argc, argv, option);
83  doInit(ofile);
84  }
85 
86  ArgOut(int& argc, char* argv[], const char* option)
87  {
88  Arg<const char*> ofile(argc, argv, option);
89  doInit(ofile);
90  }
91 
92  ArgOut(int& argc, char* argv[])
93  {
94  Arg<const char*> ofile(argc, argv);
95  doInit(ofile);
96  }
97 
98  bool redirected() const
99  {
100  return rdbuf() != std::cout.rdbuf();
101  }
102  };
103 }
104 
105 #endif // CXXTOOLS_STDOUT_H