com.nothome.delta.text
Class Checksum

java.lang.Object
  com.nothome.delta.text.Checksum

public class Checksum
extends Object

Checksum that uses character streams.

Field Summary

protected gnu.trove.TLongIntHashMap	checksums
static boolean	debug

Constructor Summary

Checksum(Readable source, int chunkSize)
Initialize checksums for source.

Method Summary

int	findChecksumIndex(long hashf)
static long	incrementChecksum(long checksum, char out, char in, int chunkSize)
static long	queryChecksum(CharBuffer bb, int len) Marks, gets, then resets the checksum computed from the buffer.
String	toString() Returns a debug String.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

debug

public static boolean debug

checksums

protected gnu.trove.TLongIntHashMap checksums

Constructor Detail

Checksum

public Checksum(Readable source,
                int chunkSize)
         throws IOException

Initialize checksums for source. The checksum for the chunkSize bytes at offset chunkSize * i is inserted into an array at index i.

Throws:

IOException

Method Detail

queryChecksum

public static long queryChecksum(CharBuffer bb,
                                 int len)

Marks, gets, then resets the checksum computed from the buffer.

incrementChecksum

public static long incrementChecksum(long checksum,
                                     char out,
                                     char in,
                                     int chunkSize)

findChecksumIndex

public int findChecksumIndex(long hashf)

toString

public String toString()

Returns a debug String.

Overrides:

toString in class Object