Checksum calculator, based on Adler32 algorithm.
Updates checksum by calculating checksum of the given buffer and adding it to current value.
| Parameter | Type | Description |
|---|---|---|
| checksum | number |
current checksum. |
| buffer | Uint8Array |
data byte array. |
| offset | number |
offset in the buffer. |
| length | number |
length of data to be used from the stream. |
Returns number