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use perfect_hash::mph_lookup;
use tables::*;
pub fn canonical_combining_class(c: char) -> u8 {
mph_lookup(c.into(), CANONICAL_COMBINING_CLASS_SALT, CANONICAL_COMBINING_CLASS_KV,
u8_lookup_fk, u8_lookup_fv, 0)
}
pub(crate) fn composition_table(c1: char, c2: char) -> Option<char> {
if c1 < '\u{10000}' && c2 < '\u{10000}' {
mph_lookup((c1 as u32) << 16 | (c2 as u32),
COMPOSITION_TABLE_SALT, COMPOSITION_TABLE_KV,
pair_lookup_fk, pair_lookup_fv_opt, None)
} else {
composition_table_astral(c1, c2)
}
}
pub(crate) fn canonical_fully_decomposed(c: char) -> Option<&'static [char]> {
mph_lookup(c.into(), CANONICAL_DECOMPOSED_SALT, CANONICAL_DECOMPOSED_KV,
pair_lookup_fk, pair_lookup_fv_opt, None)
}
pub(crate) fn compatibility_fully_decomposed(c: char) -> Option<&'static [char]> {
mph_lookup(c.into(), COMPATIBILITY_DECOMPOSED_SALT, COMPATIBILITY_DECOMPOSED_KV,
pair_lookup_fk, pair_lookup_fv_opt, None)
}
pub fn is_combining_mark(c: char) -> bool {
mph_lookup(c.into(), COMBINING_MARK_SALT, COMBINING_MARK_KV,
bool_lookup_fk, bool_lookup_fv, false)
}
pub fn stream_safe_trailing_nonstarters(c: char) -> usize {
mph_lookup(c.into(), TRAILING_NONSTARTERS_SALT, TRAILING_NONSTARTERS_KV,
u8_lookup_fk, u8_lookup_fv, 0) as usize
}
#[inline]
fn u8_lookup_fk(kv: u32) -> u32 {
kv >> 8
}
#[inline]
fn u8_lookup_fv(kv: u32) -> u8 {
(kv & 0xff) as u8
}
#[inline]
fn bool_lookup_fk(kv: u32) -> u32 {
kv
}
#[inline]
fn bool_lookup_fv(_kv: u32) -> bool {
true
}
#[inline]
fn pair_lookup_fk<T>(kv: (u32, T)) -> u32 {
kv.0
}
#[inline]
fn pair_lookup_fv_opt<T>(kv: (u32, T)) -> Option<T> {
Some(kv.1)
}