BOOL RelocateClusterChain(RDWRHandle handle, CLUSTER source, CLUSTER dest)
{
unsigned long filesize;
/* Start by relocating the first cluster */
if (!RelocateCluster(handle, source, dest))
RETURN_FTEERROR(FALSE);
/* After that, just move all the data from the source to the destination,
adding fat labels to the destination */
filesize = CalculateFileSize(handle, source);
if (filesize == FAIL)
RETURN_FTEERROR(FALSE);
if (!MarkClusterChain(handle, dest, filesize))
RETURN_FTEERROR(FALSE);
if (!CopyClusterChain(handle, source, dest))
RETURN_FTEERROR(FALSE);
/* In the end, remove all the fat labels from the source */
if (!CleanFatLabelChain(handle, source))
RETURN_FTEERROR(FALSE);
return TRUE;
}
BOOL RelocateKnownFile(RDWRHandle handle,
struct DirectoryPosition* pos,
struct DirectoryEntry* entry,
CLUSTER destination)
{
/* We assume destination long enough to relocate the complete file */
unsigned long length, flength;
CLUSTER firstcluster;
CLUSTER source;
firstcluster = GetFirstCluster(entry);
length = CalculateFileSize(handle, firstcluster);
if (length == FAIL)
RETURN_FTEERROR(FALSE);
/* Small optimization for when length == 1 */
if (!RelocateFirstCluster(handle, pos, entry, destination))
RETURN_FTEERROR(FALSE);
if (length == 1) return TRUE;
length--;
/* Change the structures for the relocation */
firstcluster = GetFirstCluster(entry); // Value is now different!
if (!GetNthCluster(handle, firstcluster, &source))
return FALSE;
destination++;
while (length > 0)
{
if (!GetNextConsecutiveChain(handle, source, length, &flength))
RETURN_FTEERROR(FALSE);
if (!RelocateConsecutiveClusterSeq(handle, source, destination, flength))
RETURN_FTEERROR(FALSE);
if (!GetNthCluster(handle, destination + flength-1, &source))
return FALSE;
if (FAT_LAST(source))
return length == flength;
destination += flength;
length -= flength;
}
return TRUE;
}
FileDisk(std::string file_name, u32 desired_size)
{
//Chequeamos si existe y si no lo cremaos
file=fopen(file_name.c_str(), "rb");
if(!file)
{
//Creamos
file=fopen(file_name.c_str(), "wb");
//Relenamos con ceros
u8 null=0;
for(unsigned int i=0; i<desired_size; i++)
fwrite(&null, 1, 1, file);
}
fclose(file);
//Obtenemos el file size
file_size=CalculateFileSize(file_name);
//Abrimos
file=fopen(file_name.c_str(), "r+b");
}
