#ifndef __UTILS_H
#define __UTILS_H

#include <fcntl.h>
#include <sys/time.h>
#include <stdexcept>
#include <string>

#define     HOUR                    (60*60)
#define     DAY                     (24*HOUR)
#define     ROUND(x)                (int)((x) + 0.5)

using std::string;

time_t usec_diff(struct timeval &tv1, struct timeval &tv2);

class ImmsRandom
{
public:
    ImmsRandom()
    {
	urandom = open("/dev/urandom", O_RDONLY);
	if (urandom == -1)
	    throw std::runtime_error("could not open /dev/urandom");
    }
    ~ImmsRandom()
    {
	(void)close(urandom);
    }
    int imms_random(int max)
    {
	unsigned long rand_num;

        (void)read(urandom, &rand_num, sizeof(rand_num));
        double cof = rand_num / (ULONG_MAX + 1.0);
        return (int)(max * cof);
    }
private:
    int urandom;
};

class StackTimer
{
public:
    StackTimer();
    ~StackTimer();
private:
    struct timeval start;
};

class StackLockFile
{
public:
    class AlreadyLocked {};
    StackLockFile(const string &_name);
    ~StackLockFile();
    bool isok() { return name != ""; }
private:
    string name;
};

string get_imms_root(const string &file = "");

string path_normalize(const string &path);

float rms_string_distance(const string &s1, const string &s2, int max = INT_MAX);
string rescale_bpmgraph(const string &graph);

#endif