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| author | antirez <antirez@gmail.com> | 2011-10-02 14:05:29 +0200 |
|---|---|---|
| committer | antirez <antirez@gmail.com> | 2011-10-02 14:05:29 +0200 |
| commit | 13c7e5ef299f4f6b38cd81c924bdf3eca691d691 (patch) | |
| tree | ede11599373793855897db9cbe5ae1675a0630f9 | |
| parent | 66c146592a0c0ff39570633811008cee8773233e (diff) | |
| download | redis-13c7e5ef299f4f6b38cd81c924bdf3eca691d691.tar.gz | |
Exact variant of CRC16 specified into crc16.c
| -rw-r--r-- | src/crc16.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/crc16.c b/src/crc16.c index 37fb4ca77..6ba7f2448 100644 --- a/src/crc16.c +++ b/src/crc16.c @@ -28,7 +28,20 @@ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ -/* CRC16 implementation acording to CCITT standards */ +/* CRC16 implementation acording to CCITT standards. + * + * Note by @antirez: this is actually the XMODEM CRC 16 algorithm, using the + * following parameters: + * + * Name : "XMODEM", also known as "ZMODEM", "CRC-16/ACORN" + * Width : 16 bit + * Poly : 1021 (That is actually x^16 + x^12 + x^5 + 1) + * Initialization : 0000 + * Reflect Input byte : False + * Reflect Output CRC : False + * Xor constant to output CRC : 0000 + * Output for "123456789" : 31C3 + */ static const uint16_t crc16tab[256]= { 0x0000,0x1021,0x2042,0x3063,0x4084,0x50a5,0x60c6,0x70e7, |