#ifdef __cplusplus
extern "C" {
#endif
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include <windows.h>
#include <stdio.h>
#include <tchar.h>
#ifdef __cplusplus
}
#endif



MODULE = Filesys::DfPortable	PACKAGE = Filesys::DfPortable

void
_dfportable(pszDrive)
	LPCSTR pszDrive

	PREINIT:
   	__int64 i64FreeBytesToCaller, i64TotalBytes, i64FreeBytes;
	BOOL fResult;
	DWORD dwSectPerClust, 
	      dwBytesPerSect, 
	      dwFreeClusters, 
	      dwTotalClusters;

	PPCODE:
		typedef BOOL (WINAPI *PGETDISKFREESPACEEX)(LPCSTR,
		PULARGE_INTEGER, PULARGE_INTEGER, PULARGE_INTEGER);

		PGETDISKFREESPACEEX pGetDiskFreeSpaceEx;

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

		EXTEND(sp, 7);
		if(pGetDiskFreeSpaceEx) {
			fResult = pGetDiskFreeSpaceEx (pszDrive,
                 	(PULARGE_INTEGER)&i64FreeBytesToCaller,
                 	(PULARGE_INTEGER)&i64TotalBytes,
                 	(PULARGE_INTEGER)&i64FreeBytes);

			if(fResult) {
				/* XS doesn't have a long long equivalent */
				/* will need to return a string instead */
				TCHAR szBuffer[32];

				PUSHs(sv_2mortal(newSVuv(1))); /* frsize on Windows is always 1 */

				_stprintf(szBuffer, TEXT("%I64u"), i64TotalBytes);
				PUSHs(sv_2mortal(newSVpv((LPTSTR)(szBuffer), 0)));

				_stprintf(szBuffer, TEXT("%I64u"), i64FreeBytes);
				PUSHs(sv_2mortal(newSVpv((LPTSTR)(szBuffer), 0)));

				_stprintf(szBuffer, TEXT("%I64u"), i64FreeBytesToCaller);
				PUSHs(sv_2mortal(newSVpv((LPTSTR)(szBuffer), 0)));

				/* No inode values. */
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
      		}

			else {
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));

				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
			}
		}

		else {
			fResult = GetDiskFreeSpaceA (pszDrive, 
                 		&dwSectPerClust, 
                 		&dwBytesPerSect,
                 		&dwFreeClusters, 
                 		&dwTotalClusters);


			if(fResult) {
				/* XS doesn't have a long long equivalent */
				/* will need to return a string instead */
				TCHAR szBuffer[32];
				ULARGE_INTEGER ullTemp;
				DWORD dwClusterSize = dwSectPerClust * dwBytesPerSect;

				PUSHs(sv_2mortal(newSVuv(1))); /* frsize on Windows is always 1 */

				ullTemp.QuadPart = (dwTotalClusters * dwClusterSize);
				_stprintf(szBuffer, TEXT("%I64u"), ullTemp);
				PUSHs(sv_2mortal(newSVpv((LPTSTR)(szBuffer), 0)));

				ullTemp.QuadPart = (dwFreeClusters * dwClusterSize);
				_stprintf(szBuffer, TEXT("%I64u"), ullTemp);
				PUSHs(sv_2mortal(newSVpv((LPTSTR)(szBuffer), 0)));
				/* No bavail */
				PUSHs(sv_2mortal(newSVpv((LPTSTR)(szBuffer), 0)));

				/* No inode values. */
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
      		}

			else {
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));

				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
				PUSHs(sv_2mortal(newSVuv(0)));
			}
		}