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java.lang.Object | +--net.rim.device.api.util.CRC32
Computes the 32-bit CRC (checksum) for a data stream.
Based on FCS-32 specified in RFC 1662 (STD 51).
Note: The byte ordering of the resulting checksum value depends on the protocol in which the CRC is used. The ordering used in a specified protocol might be different from the ordering used in this implementation. The output of this implementation can be reversed when used with such a protocol.
| Field Summary | ||
static int |
INITIAL_VALUE
Initial checksum value used before updates. |
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| Method Summary | ||
static int |
update(int crc,
byte[] b)
Updates the checksum with the specified array of bytes. |
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static int |
update(int crc,
byte[] b,
int offset,
int length)
Updates the checksum with a section of provided array of bytes. |
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static int |
update(int crc,
int b)
Updates the checksum with the specified byte. |
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| Methods inherited from class java.lang.Object |
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
| Field Detail |
| Method Detail |
public static int update(int crc,
byte[] b)
crc - The checksum to update.b - The byte array with which to update the checksum.
public static int update(int crc,
byte[] b,
int offset,
int length)
crc - The checksum to update.b - A byte array containing the section with which to update the checksum.off - The first element in the byte array used to update the checksum.len - The number of bytes in the section used to update the checksum.
public static int update(int crc,
int b)
crc - The checksum to update.b - The byte with which to update the checksum.
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