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/***********************************************************************
Moses - statistical machine translation system
Copyright (C) 2006-2012 University of Edinburgh
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.
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
***********************************************************************/
#pragma once
#ifndef PCFG_TOOL_H_
#define PCFG_TOOL_H_
#include <boost/program_options/cmdline.hpp>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <string>
namespace Moses {
namespace PCFG {
class Tool {
public:
virtual ~Tool() {}
const std::string &name() const { return name_; }
virtual int Main(int argc, char *argv[]) = 0;
protected:
Tool(const std::string &name) : name_(name) {}
// Returns the boost::program_options style that should be used by all tools.
static int CommonOptionStyle() {
namespace cls = boost::program_options::command_line_style;
return cls::default_style & (~cls::allow_guessing);
}
void Warn(const std::string &msg) const {
std::cerr << name_ << ": warning: " << msg << std::endl;
}
void Error(const std::string &msg) const {
std::cerr << name_ << ": error: " << msg << std::endl;
std::exit(1);
}
// Initialises the tool's main input stream and returns a reference that is
// valid for the remainder of the tool's lifetime. If filename is empty or
// "-" then input is standard input; otherwise it is the named file. Calls
// Error() if the file cannot be opened for reading.
std::istream &OpenInputOrDie(const std::string &filename);
// Initialises the tool's main output stream and returns a reference that is
// valid for the remainder of the tool's lifetime. If filename is empty or
// "-" then output is standard output; otherwise it is the named file. Calls
// Error() if the file cannot be opened for writing.
std::ostream &OpenOutputOrDie(const std::string &filename);
// Opens the named input file using the supplied ifstream. Calls Error() if
// the file cannot be opened for reading.
void OpenNamedInputOrDie(const std::string &, std::ifstream &);
// Opens the named output file using the supplied ofstream. Calls Error() if
// the file cannot be opened for writing.
void OpenNamedOutputOrDie(const std::string &, std::ofstream &);
private:
std::string name_;
std::istream *input_ptr_;
std::ifstream input_file_stream_;
std::ostream *output_ptr_;
std::ofstream output_file_stream_;
};
} // namespace PCFG
} // namespace Moses
#endif
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