/* @param cluster: cluster number
* @param buffer: the buffer to store the cluster
* @param cluster size: cluster size in sectors
*/
static inline void cluster_read(int cluster, char *buffer, int cluster_size,
struct fat_part_desc *desc)
{
int i, sect;
sect = cluster_to_sector(cluster, desc);
for (i = 0; i < cluster_size; ++i, ++sect)
block_read_lba(sect, buffer + (i * 512));
}
void setlast(int disk, int *track, int *head, int sysonly)
{
int i;
struct DEVICEPARAMS dp;
long fatsector,lastsec;
int secsfat,datasec;
unsigned int nclusters;
unsigned short maxcluster;
if ((i = disk_getparams(disk,&dp)) != DISK_OK)
{
/* LIB TODO: make a strliberror() function (like strerror()) */
lib_error("getlast()",i);
exit(1);
}
if (sysonly)
{
datasec = data_sector(&dp);
physical(track,NULL,head,datasec,dp.hidden_sectors,dp.secs_track,
dp.num_heads);
printf("System extends to track %d, side %d (logical sector %d).\n",
MaxTrack,MaxHead,datasec);
return;
}
nclusters = num_clusters(&dp);
fatsector = dp.reserved_secs;
secsfat = dp.secs_fat;
maxcluster = searchfat12(disk,(unsigned short)nclusters,
fatsector,secsfat,0);
if (maxcluster == 0)
die("There seems to be no data on the disk in ","%c:.",disk+'A');
datasec = data_sector(&dp);
lastsec = cluster_to_sector(maxcluster,datasec,dp.secs_cluster);
lastsec += (dp.secs_cluster-1);
physical(track,NULL,head,lastsec,dp.hidden_sectors,dp.secs_track,
dp.num_heads);
printf("Last allocated cluster, %u, is on ",maxcluster);
printf("track %d, side %d.\n",MaxTrack,MaxHead);
}
