#ifndef RANDOM_H
#define RANDOM_H
#include <unistd.h>
#include <sys/syscall.h>
#ifdef __linux__
#include <linux/random.h>
#endif
#ifndef SYS_getrandom
#include <openssl/rand.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <string>

//dirty hacks
#ifdef SYS_getrandom
inline int getrandom(void *buf, size_t buflen, unsigned int flags)
{
	return syscall(SYS_getrandom, buf, buflen, flags);
}
#else

#if __linux__
//ancient linux systems
#define GRND_NONBLOCK 0
inline int getrandom(void *buf, size_t buflen, unsigned int flags)
{
	int result = RAND_bytes(buf, buflen);
	if(result == 1)
	{
		return (int) buflen;
	}
	return -1;
}
#endif
#if  __OpenBSD__
inline int getrandom(void *buf, size_t buflen, unsigned int flags)
{
	arc4random_buf(buf, buflen);
	return 0;
}
#endif
#endif
/* TODO: if the >=C++11 prngr are good enough, use them */
class Random
{
public:
	Random();
	std::string getRandomHexString(unsigned int bytes );
};

#endif // RANDOM_H