Class CRC32C
java.lang.Object
java.util.zip.CRC32C
- All Implemented Interfaces:
Checksum
A class that can be used to compute the CRC-32C of a data stream.
CRC-32C is defined in RFC 3720: Internet Small Computer Systems Interface (iSCSI).
Passing a null
argument to a method in this class will cause a
NullPointerException
to be thrown.
- Since:
- 9
- External Specifications
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionlong
getValue()
Returns CRC-32C value.void
reset()
Resets CRC-32C to initial value.void
update
(byte[] b, int off, int len) Updates the CRC-32C checksum with the specified array of bytes.void
update
(int b) Updates the CRC-32C checksum with the specified byte (the low eight bits of the argument b).void
update
(ByteBuffer buffer) Updates the CRC-32C checksum with the bytes from the specified buffer.
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Constructor Details
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CRC32C
public CRC32C()Creates a new CRC32C object.
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Method Details
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update
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update
public void update(byte[] b, int off, int len) Updates the CRC-32C checksum with the specified array of bytes.- Specified by:
update
in interfaceChecksum
- Parameters:
b
- the byte array to update the checksum withoff
- the start offset of the datalen
- the number of bytes to use for the update- Throws:
ArrayIndexOutOfBoundsException
- ifoff
is negative, orlen
is negative, oroff+len
is negative or greater than the length of the arrayb
.
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update
Updates the CRC-32C checksum with the bytes from the specified buffer. The checksum is updated with the remaining bytes in the buffer, starting at the buffer's position. Upon return, the buffer's position will be updated to its limit; its limit will not have been changed. -
reset
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getValue
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