D:/Programmierung/C/TRTK/src/Tools.cpp

/*
    Copyright (C) 2010 - 2014 Christoph Hänisch

    Chair of Medical Engineering (mediTEC)
    RWTH Aachen University
    Pauwelsstr. 20
    52074 Aachen
    Germany

    See license.txt for more information.

    Version 0.3.1 (2014-07-05)
*/

#include <ctime>
#include <fstream>
#include <string>

#include "TRTK/Tools.hpp"


using namespace std;


namespace TRTK
{


namespace Tools
{


bool fileExists(const char * file_name)
{
    ifstream file(file_name);
    if (file)
    {
        file.close();
        return true;
    }
    else
    {
        return false;
    }
}


unsigned long long fileLength(const char * file_name)
{
    ifstream file(file_name, ifstream::binary);

    if (file)
    {
        file.seekg(0, file.end);
        unsigned long long length = (unsigned long long) file.tellg();

        file.close();

        return length;
    }
    else
    {
        return 0;
    }
}


unsigned long long fileLength(ifstream & file_stream)
{
    unsigned long long old_position = (unsigned long long) file_stream.tellg();

    file_stream.seekg(0, ios::end);
    unsigned long long length = (unsigned long long) file_stream.tellg();

    file_stream.seekg(old_position);

    return length;
}


string getCurrentDate()
{
    time_t rawtime = time(0);
    tm * now = localtime(& rawtime);

    int year = now->tm_year + 1900;
    int month = now->tm_mon + 1;
    int day = now->tm_mday;

    char buffer[11];
    sprintf(buffer, "%04i-%02i-%02i", year, month, day);

    return string(buffer);
}


string getCurrentTime()
{
    time_t rawtime = time(0);
    tm * now = localtime(& rawtime);

    int hours = now->tm_hour;
    int minutes = now->tm_min;
    int seconds = now->tm_sec;

    char buffer[9];
    sprintf(buffer, "%02i:%02i:%02i", hours, minutes, seconds);

    return string(buffer);
}


double randn()
{
    return randn<double>();
}


} // namespace Tools


} // namespace TRTK