/*
    $Id: input.cc 1109 2007-04-17 00:04:26Z rvernica $

    Copyright (C) 2007 by The Regents of the University of California

    Redistribution of this file is permitted under the terms of the
    GNU Public License (GPL).

    Date: 02/16/2007
    Author: Rares Vernica <rvernica@ics.uci.edu>
*/

#include "input.h"

#include <fstream>
#include <iostream>

void readString(vector<string> &data, 
                 const string filenameData, 
                 const unsigned count)
{
  ifstream fileData(filenameData.c_str());
  if (!fileData) {
    cerr << "can't open input file \"" << filenameData << "\"" << endl;
    exit(EXIT_FAILURE);
  }

  const unsigned maxLineLen = 256;
  char line[maxLineLen];

  while (true) {
    fileData.getline(line, maxLineLen);
    if (fileData.eof())
      break;
    if (fileData.fail()) {
      cerr << "open reading input file \"" << filenameData << "\"" << endl
           << "line length might exceed " << maxLineLen << " characters" << endl;
      exit(EXIT_FAILURE);
    }
    data.push_back(string(line));
    if (count != 0 && data.size() == count)
      break;
  }

  fileData.close();
}

void readUnsignedBin(vector<unsigned> &data, 
                       const string filenameData)
{
  ifstream fileData(filenameData.c_str(), ios::in | ios::binary);
  if (!fileData) {
    cerr << "can't open input file \"" << filenameData << "\"" << endl;
    exit(EXIT_FAILURE);
  }

  unsigned e;
  while (true) {
    fileData.read(reinterpret_cast<char*>(&e), sizeof(unsigned));
    if (fileData.eof())
      break;
    data.push_back(e);
  }
    
  fileData.close();
}

bool existFileBin(const string &filename)  
{
  ifstream file(filename.c_str(), ios::in | ios::binary);
  if (!file) 
    return false;
  file.close();
  return true;
}

bool existFile(const string &filename) 
{
  ifstream file(filename.c_str(), ios::in);
  if (!file) 
    return false;
  file.close();
  return true;
}