public FDSDisk(BinaryReader r)
{
long startpos = r.BaseStream.Position;
long endpos = startpos + 65500;
if (r.ReadByte() != 1)
throw new InvalidOperationException("Bad Block Code");
if (!r.ReadBytes(14).SequenceEqual(Check))
throw new InvalidOperationException("Bad Verification Code");
// one could do quite a bit with this data
HeaderData = r.ReadBytes(41);
if (r.ReadByte() != 2)
throw new InvalidOperationException("Bad Block Code");
int nfiles = r.ReadByte();
while (nfiles > 0)
{
Chunks.Add(new FDSChunk(r));
nfiles--;
}
if (r.BaseStream.Position > endpos)
throw new InvalidOperationException("Disk too long");
long usedpos = r.BaseStream.Position;
while (true)
{
try
{
var chunk = new FDSChunk(r) { Hidden = true };
if (r.BaseStream.Position <= endpos)
{
Chunks.Add(chunk);
usedpos = r.BaseStream.Position;
}
else
{
break;
}
}
catch { break; }
}
r.BaseStream.Seek(usedpos, SeekOrigin.Begin);
ExtraData = r.ReadBytes((int)(endpos - usedpos));
}
public FDSDisk(BinaryReader r)
{
long startpos = r.BaseStream.Position;
long endpos = startpos + 65500;
if (r.ReadByte() != 1)
{
throw new InvalidOperationException("Bad Block Code");
}
if (!r.ReadBytes(14).SequenceEqual(Check))
{
throw new InvalidOperationException("Bad Verification Code");
}
// one could do quite a bit with this data
HeaderData = r.ReadBytes(41);
if (r.ReadByte() != 2)
{
throw new InvalidOperationException("Bad Block Code");
}
int nfiles = r.ReadByte();
while (nfiles > 0)
{
Chunks.Add(new FDSChunk(r));
nfiles--;
}
if (r.BaseStream.Position > endpos)
{
throw new InvalidOperationException("Disk too long");
}
long usedpos = r.BaseStream.Position;
while (true)
{
try
{
var chunk = new FDSChunk(r)
{
Hidden = true
};
if (r.BaseStream.Position <= endpos)
{
Chunks.Add(chunk);
usedpos = r.BaseStream.Position;
}
else
{
break;
}
}
catch { break; }
}
r.BaseStream.Seek(usedpos, SeekOrigin.Begin);
ExtraData = r.ReadBytes((int)(endpos - usedpos));
}