// OpenFile.cpp : Defines the entry point for the console application.
//

#include <stdafx.h>
#include <stdio.h>
#include <malloc.h>
#include <iostream>
#include <windows.h>


int _tmain(int argc, _TCHAR* argv[])
{
   HANDLE h;
   h = CreateFile (
       "C:\\work\\abc.dat", // pointer to name of the file
       GENERIC_READ | GENERIC_WRITE, // access (read-write) mode
       0, // share mode
       NULL, // pointer to security attributes
       CREATE_ALWAYS, // how to create
       FILE_ATTRIBUTE_NORMAL,	// file attributes
       NULL 	// handle to file with attributes to copy
       );

    if (h == INVALID_HANDLE_VALUE)
	{
       std::cout << "Chyba pri otvirani" << std::endl;
	}
	else
	{
       std::cout << "Soubor otevren" << std::endl;

	   // char buf [] = "Nejaky text";
	   // DWORD size = strlen (buf);
	   DWORD size = 1024 * 1024;
	   void * buf = calloc (1, size);
	   DWORD answer;
	   BOOL ok;

	   // ok = ReadFile (h, buf, size, &answer, NULL);
	   // answer = read (h, buf, size);
	   /// ok = WriteFile (h, buf, size, &answer, NULL);

	   char * local_buf = (char *) buf;
	   answer = 0;
	   ok = TRUE;

	   while (ok && answer < size)
	   {
   	       DWORD local_size = size - answer; 
	       DWORD local_answer = 0; 
  	       ok = WriteFile (h, local_buf, local_size, &local_answer, NULL);
		   if (ok)
		   {
              std::cout << "Cast zapsana " << local_answer << std::endl;
              answer += local_answer;
		      local_buf += local_answer;
		   }
	   }

	   if (ok && answer == size)
          std::cout << "Data zapsana" << std::endl;
	   else
          std::cout << "Chyba pri zapisu" << std::endl;
	   
	   CloseHandle (h);
	}

	char * str = new char [11];
	std::cin.getline(str, 10);

	return 0;
}