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java.lang.Object net.sf.zipme.CRC32
Computes CRC32 data checksum of a data stream. The actual CRC32 algorithm is described in RFC 1952 (GZIP file format specification version 4.3). Can be used to get the CRC32 over a stream if used with checked input/output streams.
InflaterInputStream
,
DeflaterOutputStream
Constructor Summary | |
CRC32()
|
Method Summary | |
long |
getValue()
Returns the CRC32 data checksum computed so far. |
void |
reset()
Resets the CRC32 data checksum as if no update was ever called. |
void |
update(byte[] buf)
Adds the complete byte array to the data checksum. |
void |
update(byte[] buf,
int off,
int len)
Adds the byte array to the data checksum. |
void |
update(int bval)
Updates the checksum with the int bval. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public CRC32()
Method Detail |
public long getValue()
getValue
in interface Checksum
public void reset()
reset
in interface Checksum
public void update(int bval)
update
in interface Checksum
bval
- (the byte is taken as the lower 8 bits of bval)public void update(byte[] buf, int off, int len)
update
in interface Checksum
buf
- the buffer which contains the dataoff
- the offset in the buffer where the data startslen
- the length of the datapublic void update(byte[] buf)
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