Feeds data into an existing GChecksum. The checksum must still be
open, that is g_checksum_get_string() or g_checksum_get_digest() must
not have been called on checksum.
Available since: 2.16
Parameters
data
Type: An array of guint8
Buffer used to compute the checksum.
The length of the array is specified in the length argument.
The data is owned by the caller of the function.
length
Type:gssize
Size of the buffer, or -1 if it is a null-terminated string.