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Improved GetDiskFreeSpace32A().

This commit is contained in:
Andreas Mohr 1998-11-27 15:02:25 +00:00 committed by Alexandre Julliard
parent cd448946e3
commit 4ae195a2f5
1 changed files with 52 additions and 11 deletions
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63
files/drive.c
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@ -450,9 +450,9 @@ int DRIVE_Chdir( int drive, const char *path )
BY_HANDLE_FILE_INFORMATION info;
TDB *pTask = (TDB *)GlobalLock16( GetCurrentTask() );
TRACE(dosfs, "(%c:,%s)\n", 'A' + drive, path );
strcpy( buffer, "A:" );
buffer[0] += drive;
TRACE(dosfs, "(%c:,%s)\n", buffer[0], path );
lstrcpyn32A( buffer + 2, path, sizeof(buffer) - 2 );
if (!DOSFS_GetFullName( buffer, TRUE, &full_name )) return 0;
@ -630,6 +630,30 @@ BOOL16 WINAPI GetDiskFreeSpace16( LPCSTR root, LPDWORD cluster_sectors,
/***********************************************************************
* GetDiskFreeSpace32A (KERNEL32.206)
*
* Fails if expression resulting from current drive's dir and "root"
* is not a root dir of the target drive.
*
* UNDOC: setting some LPDWORDs to NULL is perfectly possible
* if the corresponding info is unneeded.
*
* FIXME: needs to support UNC names from Win95 OSR2 on.
*
* Behaviour under Win95a:
* CurrDir root result
* "E:\\TEST" "E:" FALSE
* "E:\\" "E:" TRUE
* "E:\\" "E" FALSE
* "E:\\" "\\" TRUE
* "E:\\TEST" "\\" TRUE
* "E:\\TEST" ":\\" FALSE
* "E:\\TEST" "E:\\" TRUE
* "E:\\TEST" "" FALSE
* "E:\\" "" FALSE (!)
* "E:\\" 0x0 TRUE
* "E:\\TEST" 0x0 TRUE (!)
* "E:\\TEST" "C:" TRUE (when CurrDir of "C:" set to "\\")
* "E:\\TEST" "C:" FALSE (when CurrDir of "C:" set to "\\TEST")
*/
BOOL32 WINAPI GetDiskFreeSpace32A( LPCSTR root, LPDWORD cluster_sectors,
LPDWORD sector_bytes, LPDWORD free_clusters,
@ -637,17 +661,27 @@ BOOL32 WINAPI GetDiskFreeSpace32A( LPCSTR root, LPDWORD cluster_sectors,
{
int drive;
DWORD size,available;
LPCSTR path;
DWORD cluster_sec;
if (!root) drive = DRIVE_GetCurrentDrive();
if ((!root) || (root == "\\"))
drive = DRIVE_GetCurrentDrive();
else
if ( (strlen(root) >= 2) && (root[1] == ':')) /* root contains drive tag */
{
if ((root[1]) && ((root[1] != ':') || (root[2] != '\\')))
{
WARN(dosfs, "invalid root '%s'\n", root );
return FALSE;
}
drive = toupper(root[0]) - 'A';
path = &root[2];
if (path[0] == '\0')
path = DRIVE_GetDosCwd(drive);
else
if (path[0] == '\\')
path++;
if (strlen(path)) /* oops, we are in a subdir */
return FALSE;
}
else
return FALSE;
if (!DRIVE_GetFreeSpace(drive, &size, &available)) return FALSE;
/* Cap the size and available at 2GB as per specs. */
@ -655,19 +689,26 @@ BOOL32 WINAPI GetDiskFreeSpace32A( LPCSTR root, LPDWORD cluster_sectors,
if (available > 0x7fffffff) available = 0x7fffffff;
if (DRIVE_GetType(drive)==TYPE_CDROM) {
if (sector_bytes)
*sector_bytes = 2048;
size /= 2048;
available /= 2048;
} else {
if (sector_bytes)
*sector_bytes = 512;
size /= 512;
available /= 512;
}
/* fixme: probably have to adjust those variables too for CDFS */
*cluster_sectors = 1;
while (*cluster_sectors * 65536 < size) *cluster_sectors *= 2;
*free_clusters = available/ *cluster_sectors;
*total_clusters = size/ *cluster_sectors;
cluster_sec = 1;
while (cluster_sec * 65536 < size) cluster_sec *= 2;
if (cluster_sectors)
*cluster_sectors = cluster_sec;
if (free_clusters)
*free_clusters = available / cluster_sec;
if (total_clusters)
*total_clusters = size / cluster_sec;
return TRUE;
}