- Registriert
- Aug. 2009
- Beiträge
- 2.272
Habe gelesen, dass man statt Int, Float verwenden soll, damit die Kommastellen auch richtig angezeigt werden.
So sieht der Code aktuell aus.
So sieht der Code aktuell aus.
Code:
/*
Determines the amount of free space available for the caller.
Runs on Windows 95 retail and later, and on Windows 4.0 and later.
Uses GetDiskFreeSpaceEx if available, otherwise reverts to
GetDiskFreeSpace.
To determine the amount of available space correctly:
* Use 64-bit math with the return values of both GetDiskFreeSpace
and GetDiskFreeSpaceEx so that you can determine the sizes of
volumes that are larger than 2GB.
Programs that need to determine how much free space the current user
can have (such as whether there is enough space to complete an
installation) have an additional requirement:
* Use the lpFreeBytesAvailableToCaller value from
GetDiskFreeSpaceEx rather than lpTotalNumberOfFreeBytes.
This is because Windows 2000 has disk quota management that
administrators may use to limit the amount of disk space that
users may use.
*/
// gcc -c dfwin.c
//
// gcc dfwin.o -o dfwin
#include <windows.h>
#include <stdio.h>
typedef BOOL (WINAPI *P_GDFSE)(LPCTSTR, PULARGE_INTEGER,
PULARGE_INTEGER, PULARGE_INTEGER);
void main (int argc, char **argv)
{
BOOL fResult;
char *pszDrive = NULL,
szDrive[4];
DWORD dwSectPerClust,
dwBytesPerSect,
dwFreeClusters,
dwTotalClusters;
P_GDFSE pGetDiskFreeSpaceEx = NULL;
unsigned __int64 i64FreeBytesToCaller,
i64TotalBytes,
i64FreeBytes;
/*
Command line parsing.
If the drive is a drive letter and not a UNC path, append a
trailing backslash to the drive letter and colon. This is
required on Windows 95 and 98.
*/
if (argc != 2)
{
printf ("usage: %s <drive|UNC path>\n", argv[0]);
printf ("\texample: %s C:\\\n", argv[0]);
return;
}
pszDrive = argv[1];
if (pszDrive[1] == ':')
{
szDrive[0] = pszDrive[0];
szDrive[1] = ':';
szDrive[2] = '\\';
szDrive[3] = '\0';
pszDrive = szDrive;
}
/*
Use GetDiskFreeSpaceEx if available; otherwise, use
GetDiskFreeSpace.
Note: Since GetDiskFreeSpaceEx is not in Windows 95 Retail, we
dynamically link to it and only call it if it is present. We
don't need to call LoadLibrary on KERNEL32.DLL because it is
already loaded into every Win32 process's address space.
*/
pGetDiskFreeSpaceEx = (P_GDFSE)GetProcAddress (
GetModuleHandle ("kernel32.dll"),
"GetDiskFreeSpaceExA");
if (pGetDiskFreeSpaceEx)
{
fResult = pGetDiskFreeSpaceEx (pszDrive,
(PULARGE_INTEGER)&i64FreeBytesToCaller,
(PULARGE_INTEGER)&i64TotalBytes,
(PULARGE_INTEGER)&i64FreeBytes);
if (fResult)
{
printf ("\n\nGetDiskFreeSpaceEx reports\n\n");
printf ("Available space to caller = %I64u MB\n",
i64FreeBytesToCaller / (1024*1024));
printf ("Total space = %I64u MB\n",
i64TotalBytes / (1024*1024));
printf ("Free space on drive = %I64u MB\n",
i64FreeBytes / (1024*1024));
printf ("Used space on drive = %d.3 GB\n",
(i64TotalBytes-i64FreeBytes) / (1024*1024*1024));
}
}
else
{
fResult = GetDiskFreeSpace (pszDrive,
&dwSectPerClust,
&dwBytesPerSect,
&dwFreeClusters,
&dwTotalClusters);
if (fResult)
{
/* force 64-bit math */
i64TotalBytes = (__int64)dwTotalClusters * dwSectPerClust *
dwBytesPerSect;
i64FreeBytes = (__int64)dwFreeClusters * dwSectPerClust *
dwBytesPerSect;
printf ("GetDiskFreeSpace reports\n\n");
printf ("Free space = %I64u MB\n",
i64FreeBytes / (1024*1024));
printf ("Total space = %I64u MB\n",
i64TotalBytes / (1024*1024));
}
}
if (!fResult)
printf ("error: %lu: could not get free space for \"%s\"\n",
GetLastError(), argv[1]);
}
)
