rsmorphy 0.4.0

Morphological analyzer / inflection engine for Russian and Ukrainian (soon) languages (WIP)
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pub const PRECISION_MASK: u32 = 0xFFFF_FFFF;

pub const OFFSET_MAX: u32 = 0x0020_0000; // 1 << 21
pub const IS_LEAF_BIT: u32 = 0x8000_0000; // 1 << 31
pub const HAS_LEAF_BIT: u32 = 0x0000_0100; // 1 << 8
pub const EXTENSION_BIT: u32 = 0x0000_0200; // 1 << 9

/// Check if a unit has a leaf as a child or not.
pub fn has_leaf(base: u32) -> bool {
    base & HAS_LEAF_BIT != 0
}

/// Check if a unit corresponds to a leaf or not.
pub fn value(base: u32) -> u32 {
    base & (IS_LEAF_BIT ^ PRECISION_MASK)
}

/// Read a label with a leaf flag from a non-leaf unit.
pub fn label(base: u32) -> u32 {
    base & (IS_LEAF_BIT | 0x0000_00FF)
}

/// Read an offset to child units from a non-leaf unit.
pub fn offset(base: u32) -> u32 {
    (base >> 10) << ((base & EXTENSION_BIT) >> 6)
}