/usr/include/cxxtools/argin.h is in libcxxtools-dev 2.2.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 | /*
* Copyright (C) 2011 Tommi Maekitalo
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* As a special exception, you may use this file as part of a free
* software library without restriction. Specifically, if other files
* instantiate templates or use macros or inline functions from this
* file, or you compile this file and link it with other files to
* produce an executable, this file does not by itself cause the
* resulting executable to be covered by the GNU General Public
* License. This exception does not however invalidate any other
* reasons why the executable file might be covered by the GNU Library
* General Public License.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef CXXTOOLS_STDIN_H
#define CXXTOOLS_STDIN_H
#include <iostream>
#include <iostream>
#include <fstream>
#include <cxxtools/arg.h>
namespace cxxtools
{
/**
* Helper class for redirecting input to stdin or file using command line switch.
*
* Using this class it is easy to provide a command line switch to the user
* to read input from a file or stdin.
*
* Examples:
* \code
* int main(int argc, char* argv[])
* {
* cxxtools::ArgIn in(argc, argv, 'i');
* double d;
* while (in >> d)
* {
* std::cout << d*2 << std::endl;
* }
* }
* \endcode
*
* This program reads data from stdin or a file, when provided using the
* -i option and doubles the value
*
* \code
* int main(int argc, char* argv[])
* {
* cxxtools::ArgIn in(argc, argv);
* double d;
* while (in >> d)
* {
* std::cout << d*2 << std::endl;
* }
* }
* \endcode
*
* This program reads data from stdin or a file, when provided as a
* parameter and doubles the value. This is similar to the <> operator
* in perl.
*
*/
class ArgIn : public std::istream
{
std::ifstream _ifile;
void doInit(const Arg<const char*>& ifile)
{
std::streambuf* buf;
if (ifile.isSet())
{
_ifile.open(ifile);
buf = _ifile.rdbuf();
}
else
buf = std::cin.rdbuf();
init(buf);
}
public:
/// Constructor processes short options like: -i something.
ArgIn(int& argc, char* argv[], char option)
: std::istream(0)
{
Arg<const char*> ifile(argc, argv, option);
doInit(ifile);
}
/// Constructor processes long options like: --input something".
ArgIn(int& argc, char* argv[], const char* option)
: std::istream(0)
{
Arg<const char*> ifile(argc, argv, option);
doInit(ifile);
}
/// Constructor processes normal parameters.
ArgIn(int& argc, char* argv[])
: std::istream(0)
{
Arg<const char*> ifile(argc, argv);
doInit(ifile);
}
/// returns true, if the input is read from a file.
bool redirected() const
{
return rdbuf() != std::cin.rdbuf();
}
};
}
#endif // CXXTOOLS_STDIN_H
|