Function lookup

rust/stringzilla.rs:946–962

Performs a lookup transformation (LUT), mapping contents of a buffer into the same or other memory region, taking a byte substitution value from the provided table. # Arguments `target`: A mutable buffer to populate. `source`: An immutable buffer to map from. `table`: Lookup table of 256 substitution values. # Examples To convert uppercase ASCII characters to lowercase: ``` use stringzilla::s

(target: &mut T, source: &S, table: [u8; 256])

/// ```
///
pub fn lookup<T, S>(target: &mut T, source: &S, table: [u8; 256])
where
    T: AsMut<[u8]> + ?Sized,
    S: AsRef<[u8]> + ?Sized,
{
    let target_slice = target.as_mut();
    let source_slice = source.as_ref();
    assert!(target_slice.len() >= source_slice.len());
    unsafe {
        sz_lookup(
            target_slice.as_mut_ptr() as *mut c_void,
            source_slice.len(),
            source_slice.as_ptr() as *const c_void,
            table.as_ptr() as _,
        );
    }
}

/// Performs a lookup transformation (LUT), mapping contents of a buffer into the same or other
/// memory region, taking a byte substitution value from the provided table.