void readHeader() throws Exception {
byte[] header = new byte[this.headersize];
// this.fromfile.Seek(this.seekStart, System.IO.SeekOrigin.Begin);
this.fromfile.seek(this.seekStart);
// this.fromfile.Read(header, 0, this.headersize);
this.fromfile.read(header, 0, this.headersize);
int index = 0;
// check prefix
// foreach (byte b in HEADERPREFIX)
for (int i = 0; i < HEADERPREFIX.length; i++) {
byte b = HEADERPREFIX[i];
if (header[index] != b) {
throw new LinkedFileException("invalid header prefix");
}
index++;
}
// skip version (for now)
index++;
// read buffersize
this.buffersize = BufferFile.Retrieve(header, index);
index += BufferFile.INTSTORAGE;
this.FreeListHead = BufferFile.RetrieveLong(header, index);
this.sanityCheck();
this.headerDirty = false;
}
public ParseBuffer(long bufferNumber) throws Exception {
byte[] thebuffer = new byte[LinkedFile.this.buffersize];
byte[] fullbuffer = new byte[LinkedFile.this.buffersize + LinkedFile.BUFFEROVERHEAD];
LinkedFile.this.buffers.getBuffer(bufferNumber, fullbuffer, 0, fullbuffer.length);
this.type = fullbuffer[0];
this.NextBufferNumber = BufferFile.RetrieveLong(fullbuffer, 1);
for (int i = 0; i < LinkedFile.this.buffersize; i++) {
thebuffer[i] = fullbuffer[i + LinkedFile.BUFFEROVERHEAD];
}
this.payload = thebuffer;
}