// Example program
#include <iostream>
#include <string>
#include <locale>
#include <algorithm>

//code GetTimeMs64() coped from stackoverflow.
#ifdef _WIN32
#include <Windows.h>
#else
#include <sys/time.h>
#include <ctime>
#endif

/* Remove if already defined */
typedef long long int64; typedef unsigned long long uint64;

/* Returns the amount of milliseconds elapsed since the UNIX epoch. Works on both
 * windows and linux. */

uint64 GetTimeMs64()
{
#ifdef _WIN32
 /* Windows */
 FILETIME ft;
 LARGE_INTEGER li;

 /* Get the amount of 100 nano seconds intervals elapsed since January 1, 1601 (UTC) and copy it
  * to a LARGE_INTEGER structure. */
 GetSystemTimeAsFileTime(&ft);
 li.LowPart = ft.dwLowDateTime;
 li.HighPart = ft.dwHighDateTime;

 uint64 ret = li.QuadPart;
 ret -= 116444736000000000LL; /* Convert from file time to UNIX epoch time. */
 ret /= 10000; /* From 100 nano seconds (10^-7) to 1 millisecond (10^-3) intervals */

 return ret;
#else
 /* Linux */
 struct timeval tv;

 gettimeofday(&tv, NULL);

 uint64 ret = tv.tv_usec;
 /* Convert from micro seconds (10^-6) to milliseconds (10^-3) */
 ret /= 1000;

 /* Adds the seconds (10^0) after converting them to milliseconds (10^-3) */
 ret += (tv.tv_sec * 1000);

 return ret;
#endif
}

bool is_a_num(char c)
{
    return (c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z');
}

int main()
{
    std::string str(100000000, '_');
    for(char& c : str) {
        //this basicialyl alwas returns a valdi chracter, this is needed suhc that
        //c = 'a' + rand() % 20;
        c = rand() % 250;
    }
	auto time1 = GetTimeMs64();
	bool isvalid = true;
	int validcount = 0;
    for(char c : str) {
		validcount += std::isalnum((c), std::locale::classic()) ? 1 : 0;
        //validcount +=  is_a_num(c) ? 1 : 0;
    }

	auto time2 = GetTimeMs64();
	std::cout << "Hello, " << time2 - time1 << "," << validcount << "!\n";
}