utils.hpp

yard lib, template for regular rule

// (C) Copyright Chrstopher Diggins 2004 http://www.cdiggins.com
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt.)
//
// Disclaimer: Not a Boost library

#ifndef UTILS_HPP_INCLUDED
#define UTILS_HPP_INCLUDED

#include <time.h>
#include <fstream>
#include <iostream>

class TimeIt {
public:
    TimeIt() { mnStart = GetTickCount(); };

    ~TimeIt() { std::cout << "time elapsed (msec): " << GetMSecElapsed() << std::endl; };

    int GetMSecElapsed() { return GetTickCount() - mnStart; };

    int GetTickCount() { return int(double(clock()) * 1000 / CLOCKS_PER_SEC); };

private:
    int mnStart;
};


unsigned int GetFileSize(const char * sFileName) {
    std::ifstream f(sFileName, std::ios::binary);
    if (!f.good()) { return 0; }
    //std::ifstream::pos_type begin_pos = f.tellg();
    long begin_pos = f.tellg();
    f.seekg(0, std::ios::end);
    return f.tellg() - begin_pos;
}

char * AllocFromFile(const char * sFileName) {
    unsigned int n = GetFileSize(sFileName);
    if (n == 0) return NULL;
    char * ret = static_cast < char * > (calloc(n + 1, 1));
    if (ret == NULL) return NULL;
    std::ifstream f(sFileName, std::ios::binary);
    f.read(ret, n);
    f.close();
    return ret;
}

#endif // UTILS_HPP_INLCUDED