BOOL IsRootDirPosition(RDWRHandle handle, struct DirectoryPosition* pos)
{
struct DirectoryPosition pos1;
unsigned short NumberOfRootEntries;
assert(pos->sector && (pos->offset < 16));
NumberOfRootEntries = GetNumberOfRootEntries(handle);
if (NumberOfRootEntries == 0) return FALSE; /* Strange, but ultimately correct */
if (!GetRootDirPosition(handle, NumberOfRootEntries-1, &pos1))
RETURN_FTEERR(-1);
if (pos->sector < pos1.sector)
return TRUE;
return ((pos->sector == pos1.sector) && (pos->offset <= pos1.offset));
}
static BOOL CleanRootDir(RDWRHandle handle)
{
unsigned short NumberOfRootEntries, i;
struct DirectoryEntry entry;
memset(&entry, 0, sizeof(struct DirectoryEntry));
NumberOfRootEntries = GetNumberOfRootEntries(handle);
if (!NumberOfRootEntries) return FALSE;
for (i = NumberOfRootEntries-1;; i--)
{
if (!WriteDirEntry(handle, i, &entry))
return FALSE;
if (i == 0) break;
}
return TRUE;
}
static long CountEntriesInRootDirectory(RDWRHandle handle, char attribute)
{
long count = 0, i;
struct DirectoryEntry* entry;
long rootcount = GetNumberOfRootEntries(handle);
if (!rootcount) return FAIL;
entry = AllocateDirectoryEntry();
if (!entry) return FAIL;
for (i = 0; i < rootcount; i++)
{
if (!ReadDirEntry(handle, i, entry))
{
FreeDirectoryEntry(entry);
return FAIL;
}
if (IsLastLabel(*entry))
{
FreeDirectoryEntry(entry);
return count;
}
if (entry->attribute == LFN_ATTRIBUTES)
{
if (IsLFNEntry(entry))
count++;
}
else if ((entry->attribute & attribute) ||
(attribute == -1))
{
count++;
}
}
FreeDirectoryEntry(entry);
return rootcount;
}
static BOOL AddToRootDir(RDWRHandle handle, CLUSTER cluster, unsigned long filesize)
{
struct DirectoryEntry entry;
static unsigned short index = 0;
unsigned short NumberOfRootEntries = GetNumberOfRootEntries(handle);
if (index < NumberOfRootEntries)
{
FillNewEntry(&entry, cluster, filesize, index);
if (!WriteDirEntry(handle, index, &entry))
return FALSE;
index++;
return TRUE;
}
else
{
printf("Root directory full (or media error)!");
return FALSE;
}
}