Function ratatui_split 

#[unsafe(no_mangle)]
pub extern "C" fn ratatui_split(
    handle: *mut c_void,
    area_id: u32,
    direction: u8,
    constraint_types: *const u8,
    constraint_values: *const u16,
    count: u32,
    out_ids: *mut u32,
) -> u32

Splits an existing area into count child areas and writes their ids into out_ids.

Parameters

• area_id: id of the parent area to split.
• direction: 0 = horizontal split (left → right), any other value = vertical split (top → bottom).
• constraint_types: array of length count describing each child’s constraint kind. Values: 0 = Length, 1 = Min, 2 = Max, 3 = Percentage, 4 (or any other) = Fill.
• constraint_values: array of length count with the numeric value matching the constraint kind (cells for Length/Min/Max, 0..=100 for Percentage, weight for Fill).
• count: number of child areas requested.
• out_ids: caller-allocated buffer of length count that receives the ids of the newly registered child areas.

Returns

The number of child areas actually written. Returns 0 if any required pointer is null, count is zero, or the parent id is unknown.