Function parse_next_statement 

pub fn parse_next_statement(
    source: &[u8],
    offset: usize,
    limits: &Limits,
) -> Result<ParsedStatement, ParseError>

Parses the next statement beginning at offset.

The returned consumed count is what a caller advances by to reach the tail, which is SQLite’s prepare contract. A source that holds only trivia yields an empty statement and consumes all of it.