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mod amt;
mod error;
mod node;
mod root;
mod value_mut;
pub use self::amt::Amt;
pub use self::error::Error;
pub(crate) use self::node::Node;
pub(crate) use self::root::Root;
pub use self::value_mut::ValueMut;
const DEFAULT_BIT_WIDTH: usize = 3;
const MAX_HEIGHT: usize = 64;
pub const MAX_INDEX: usize = (std::u64::MAX - 1) as usize;
fn nodes_for_height(bit_width: usize, height: usize) -> usize {
let height_log_two = bit_width * height;
if height_log_two >= 64 {
return std::usize::MAX;
}
1 << height_log_two
}
fn init_sized_vec<V>(bit_width: usize) -> Vec<Option<V>> {
std::iter::repeat_with(|| None)
.take(1 << bit_width)
.collect()
}
fn bmap_bytes(bit_width: usize) -> usize {
if bit_width <= 3 {
1
} else {
1 << (bit_width - 3)
}
}