internal byte[] ReadFileData(GranuleChain granulechain, int lastsectorsize)
{
int filesize = GetFileSize(granulechain, lastsectorsize);
var data = new byte[filesize];
int dataoffset = 0;
int granulecount = granulechain.granules.Length;
int sectorcount = (granulecount - 1)*GranuleSectors + granulechain.sectors; // The total number of sectors holding file payload data
for (int i = 0; i < granulecount; i++ ) // Once for each granule
{
int lsn = GranuleToLsn(granulechain.granules[i]);
for (int j=0; j < Math.Min(GranuleSectors,sectorcount); j++) // Once for each granule sector, paying special attention to the last granule
{
var sector = ReadSector(lsn++);
int sectorsize = Math.Min(SectorSize, filesize); // Pay special attention to the last sector
Array.Copy(sector, 0, data, dataoffset, sectorsize);
dataoffset += sectorsize;
filesize -= sectorsize;
}
}
return data;
}
internal int GetFileSize(GranuleChain granulechain, int lastsectorsize)
{
int completegranules = Math.Max(0, granulechain.granules.Length - 1) * GranuleSize;
int lastgranule = (granulechain.sectors == 0)
? 0
: (granulechain.sectors - 1)*SectorSize + lastsectorsize;
return completegranules + lastgranule;
}
