/*
 * This file is part of the Owl Positioning System (OwlPS) project.
 * It is subject to the copyright notice and license terms in the
 * COPYRIGHT.t2t file found in the top-level directory of this
 * distribution and at
 *   https://code.lm7.fr/mcy/owlps/src/master/COPYRIGHT.t2t
 * No part of the OwlPS Project, including this file, may be copied,
 * modified, propagated, or distributed except according to the terms
 * contained in the COPYRIGHT.t2t file; the COPYRIGHT.t2t file must be
 * distributed along with this file, either separately or by replacing
 * this notice by the COPYRIGHT.t2t file's contents.
 */


#include "textfilewriter.hh"
#include "configuration.hh"
#include "posexcept.hh"

#include <iostream>

using namespace std ;



/* *** Constructors *** */


/**
 * @param _file_name The name of the file to open ('-' for the standard
 * output).
 * @throw error_opening_input_file if the file cannot be opened.
 */
TextFileWriter::TextFileWriter(const string &_file_name):
  file_name(_file_name)
{
  if (file_name == "-")
    {
      file_buf = file.rdbuf() ;
      file.std::ios::rdbuf(std::cout.rdbuf()) ;
    }
  else
    {
      file.open(file_name.c_str()) ;
      if (! file)
        throw error_opening_output_file(file_name) ;
    }
}


TextFileWriter::~TextFileWriter()
{
  if (file_name == "-")
    file.std::ios::rdbuf(file_buf) ;
  else
    file.close() ;
}



/* *** Operations *** */


/**
 * @returns `true` if the string has been written successfuly, or
 * `false` if not.
 */
bool TextFileWriter::write_text(const string &text)
{
  if (! file)
    return false ;

  file << text ;

  if (Configuration::bool_value("flush-output-files"))
    file.flush() ;

  return true ;
}