BOOL DiskSortEntries(RDWRHandle handle, CLUSTER cluster)
{
int i=0;
long totalcount, lfncount, realcount;
struct DiskEntryGetterStruct parameters;
struct DirectoryPosition pos;
struct DirectoryEntry entry;
parameters.handle = handle;
parameters.cluster = cluster;
SetResourceConfiguration(&DiskConfig);
totalcount = low_dircount(handle, cluster, 0xffff);
if (totalcount == -1)
RETURN_FTEERR(FALSE);
lfncount = low_dircount(handle, cluster, LFN_ATTRIBUTES);
if (lfncount == -1)
RETURN_FTEERR(FALSE);
realcount = totalcount - lfncount;
for (i = 0; i < 2; i++)
{
if (!GetNthDirectoryPosition(handle, cluster, i, &pos))
{
RETURN_FTEERR(FALSE);
}
if (!GetDirectory(handle, &pos, &entry))
{
RETURN_FTEERR(FALSE);
}
switch (i)
{
case 0:
if (IsCurrentDir(entry))
{
realcount--;
}
break;
case 1:
if (IsPreviousDir(entry))
{
realcount--;
}
}
}
if (realcount && realcount <= INT_MAX)
SelectionSortEntries(¶meters, (int)realcount);
return TRUE;
}
BOOL GetNthSubDirectoryPosition(RDWRHandle handle, CLUSTER cluster,
unsigned long n,
struct DirectoryPosition* result)
{
int counter = 0;
struct DirectoryPosition pos;
struct DirectoryEntry* entry;
entry = AllocateDirectoryEntry();
if (!entry) return FALSE;
n++; /* n is 0 based */
while (n)
{
pos.sector = 0;
pos.offset = 0;
if (!GetNthDirectoryPosition(handle, cluster, counter++, &pos))
{
FreeDirectoryEntry(entry);
return FALSE;
}
if ((pos.sector == 0) && (pos.offset == 0)) /* Not found*/
{
FreeDirectoryEntry(entry);
return TRUE;
}
if (!GetDirectory(handle, &pos, entry))
{
FreeDirectoryEntry(entry);
return TRUE;
}
if (!IsLFNEntry((entry)) &&
(entry->attribute & FA_DIREC) &&
(!IsDeletedLabel(*entry)) &&
(!IsCurrentDir(*entry)) &&
(!IsPreviousDir(*entry)))
{
n--;
}
}
memcpy(result, &pos, sizeof(struct DirectoryPosition));
FreeDirectoryEntry(entry);
return TRUE;
}
BOOL GetNthDirectorySector(RDWRHandle handle, CLUSTER cluster,
unsigned long n, char* sector)
{
unsigned long entry;
struct DirectoryPosition temp;
/* Calculate which entry this corresponds to */
entry = n * ENTRIESPERSECTOR;
if (!GetNthDirectoryPosition(handle, cluster, entry, &temp))
{
return FALSE;
}
return ReadDataSectors(handle, 1, temp.sector, sector);
}
