C언어] 하드 디스크 남은 용량, 사용한 용량, 전체 용량 얻기 읽기: Get Disk Free Space VC++

#include <stdio.h>
#include <Windows.h>

typedef BOOL (WINAPI *P_GDFSE)(LPCTSTR, PULARGE_INTEGER, PULARGE_INTEGER, PULARGE_INTEGER);


void main(void) {
  BOOL fResult;
  char *pszDrive  = "C:";


  P_GDFSE pGetDiskFreeSpaceEx = NULL;

  unsigned __int64 i64FreeBytesToCaller,
                   i64TotalBytes,
                   i64FreeBytes;


  pGetDiskFreeSpaceEx = (P_GDFSE)GetProcAddress (
                                                 GetModuleHandle ("kernel32.dll"), "GetDiskFreeSpaceExA"
                                                 );

  fResult = pGetDiskFreeSpaceEx (pszDrive,
                                (PULARGE_INTEGER)&i64FreeBytesToCaller,
                                (PULARGE_INTEGER)&i64TotalBytes,
                                (PULARGE_INTEGER)&i64FreeBytes);

  if (!fResult) {
    printf ("ERROR: Could not get free space for %s\n", pszDrive);
    exit(GetLastError());
  }


  unsigned __int64 UsedBytes = i64TotalBytes - i64FreeBytes;

  printf ("%s\n", pszDrive);
  printf ("전체 용량    = %I64u MB, (%.1f GB)\n\n", i64TotalBytes        / (1024*1024), (double) i64TotalBytes        / (1024*1024*1024));

  printf ("사용한 용량  = %I64u MB, (%.1f GB)\n",   UsedBytes            / (1024*1024), (double) UsedBytes            / (1024*1024*1024));
  printf ("남은 용량    = %I64u MB, (%.1f GB)\n",   i64FreeBytes         / (1024*1024), (double) i64FreeBytes         / (1024*1024*1024));
  printf ("남은 용량*   = %I64u MB, (%.1f GB)\n",   i64FreeBytesToCaller / (1024*1024), (double) i64FreeBytesToCaller / (1024*1024*1024));

}