Function register_bsdiff4_functions 

pub fn register_bsdiff4_functions(conn: &Connection) -> Result<()>

Register the bsdiff4 and bspatch4 SQL functions with the given SQLite connection. The bsdiff4 function takes two arguments, and returns the BSDiff delta (blob) of the binary difference. The arguments can be either a string or a blob. If any of the arguments are NULL, the result is NULL.

Example

let db = Connection::open_in_memory()?;
register_bsdiff4_functions(&db)?;
let result: Vec<u8> = db.query_row("SELECT bspatch4('013479', bsdiff4('013479', '23456789'))", [], |r| r.get(0))?;
let expected = b"23456789";
assert_eq!(result, expected);