Function obj_count_index_range 

#[unsafe(no_mangle)]
pub unsafe extern "C" fn obj_count_index_range(
    txn: *mut obj_read_txn_t,
    collection: *const c_char,
    index_name: *const c_char,
    lower: *const u8,
    lower_len: usize,
    lower_inclusive: bool,
    upper: *const u8,
    upper_len: usize,
    upper_inclusive: bool,
    out_count: *mut u64,
) -> obj_error_t

Count index B-tree entries inside [lower, upper]. Bounds use the same (ptr, len, inclusive) shape as obj_iter_index_range.

Safety

As obj_iter_index_range plus out_count writable.