void MIOFile_Parent (OOTstring pmNewPath, const OOTstring pmOldPath)
{
char myPath [4096];
char *myRoot, *myPtr;
// Convert to full path name
if (!MIOFile_ConvertPath (pmOldPath, myPath, NULL, NO_TRAILING_SLASH))
{
// if MIOFile_ConvertPath returned false, then the error message was
// set to indicate why.
pmNewPath [0] = 0;
return;
}
// return if root directory
if (MIOFile_GetRootDir (myPath, &myRoot))
{
strcpy (pmNewPath, pmOldPath);
SET_ERRNO (E_FILE_CANNOT_GET_PARENT_OF_ROOT);
return;
}
// At this point, we are guaranteed that the path does not end in a /
// Back up until we reach a slash and discard it, or hit the root.
myPtr = &myPath [strlen (myPath) - 1];
while (*myPtr != '/')
{
myPtr--;
}
if (myPtr < myRoot)
{
myPtr++;
}
strncpy (pmNewPath, myPath, myPtr - myPath);
pmNewPath [myPtr - myPath] = 0;
} // MIOFile_Parent
int MDIOFile_DiskFree (const char *pmPathName)
{
char myRootDir [1024];
FARPROC myGetDiskFreeSpaceExProc;
BOOL myResult;
const char *myPtr;
UINT myPrevErrorMode;
myGetDiskFreeSpaceExProc = GetProcAddress (GetModuleHandle("kernel32.dll"),
"GetDiskFreeSpaceExA");
if (myGetDiskFreeSpaceExProc == NULL)
{
DWORD mySectPerClust, myBytesPerSect, myFreeClusters, myTotalClusters;
// If GetDiskFreeSpaceEx is not available, we must get the root
// directory of the current drive and pass it to GetDiskFreeSpace.
MIOFile_GetRootDir (pmPathName, &myPtr);
strncpy (myRootDir, pmPathName, myPtr - pmPathName);
myRootDir [myPtr - pmPathName] = 0;
// Windows 95 cannot look up disk free on a network share.
if ((myRootDir [0] == '\\') && (myRootDir [1] == '\\'))
{
OSVERSIONINFO myOSVersionInfo;
ZeroMemory (&myOSVersionInfo, sizeof (myOSVersionInfo));
myOSVersionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
GetVersionEx (&myOSVersionInfo);
// You cannot use CreateFile on a directory under Win 95/98/Me
if ((myOSVersionInfo.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS) &&
(myOSVersionInfo.dwMajorVersion == 4) &&
(myOSVersionInfo.dwMinorVersion == 0))
{
return -1;
}
}
myPrevErrorMode = SetErrorMode (SEM_FAILCRITICALERRORS);
myResult = GetDiskFreeSpace (myRootDir, &mySectPerClust,
&myBytesPerSect, &myFreeClusters,
&myTotalClusters);
SetErrorMode (myPrevErrorMode);
if (myResult)
{
return (mySectPerClust * myBytesPerSect * myFreeClusters);
}
}
else
{
ULARGE_INTEGER myFreeBytesToCaller, myTotalBytes, myFreeBytes;
ULONGLONG myLongFree;
myPrevErrorMode = SetErrorMode (SEM_FAILCRITICALERRORS);
myResult = myGetDiskFreeSpaceExProc (pmPathName, &myFreeBytesToCaller,
&myTotalBytes, &myFreeBytes);
SetErrorMode (myPrevErrorMode);
if (myResult)
{
myLongFree = myFreeBytesToCaller.QuadPart;
if (myLongFree > (ULONGLONG) 0x7FFFFFFF)
{
return (0x7FFFFFFF);
}
else
{
return ((int) myLongFree);
}
}
}
// An error occurred - process it.
MDIO_ProcessMSWindowsError (GetLastError ());
return -1;
} // MDIOFile_DiskFree
