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-rw-r--r--vendor/unicode-normalization/src/lookups.rs138
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diff --git a/vendor/unicode-normalization/src/lookups.rs b/vendor/unicode-normalization/src/lookups.rs
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+// Copyright 2019 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+//! Lookups of unicode properties using minimal perfect hashing.
+
+use crate::perfect_hash::mph_lookup;
+use crate::tables::*;
+
+/// Look up the canonical combining class for a codepoint.
+///
+/// The value returned is as defined in the Unicode Character Database.
+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,
+ )
+ .map(|(start, len)| &CANONICAL_DECOMPOSED_CHARS[start as usize..][..len as usize])
+}
+
+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,
+ )
+ .map(|(start, len)| &COMPATIBILITY_DECOMPOSED_CHARS[start as usize..][..len as usize])
+}
+
+pub(crate) fn cjk_compat_variants_fully_decomposed(c: char) -> Option<&'static [char]> {
+ mph_lookup(
+ c.into(),
+ CJK_COMPAT_VARIANTS_DECOMPOSED_SALT,
+ CJK_COMPAT_VARIANTS_DECOMPOSED_KV,
+ pair_lookup_fk,
+ pair_lookup_fv_opt,
+ None,
+ )
+ .map(|(start, len)| &CJK_COMPAT_VARIANTS_DECOMPOSED_CHARS[start as usize..][..len as usize])
+}
+
+/// Return whether the given character is a combining mark (`General_Category=Mark`)
+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
+}
+
+/// Extract the key in a 24 bit key and 8 bit value packed in a u32.
+#[inline]
+fn u8_lookup_fk(kv: u32) -> u32 {
+ kv >> 8
+}
+
+/// Extract the value in a 24 bit key and 8 bit value packed in a u32.
+#[inline]
+fn u8_lookup_fv(kv: u32) -> u8 {
+ (kv & 0xff) as u8
+}
+
+/// Extract the key for a boolean lookup.
+#[inline]
+fn bool_lookup_fk(kv: u32) -> u32 {
+ kv
+}
+
+/// Extract the value for a boolean lookup.
+#[inline]
+fn bool_lookup_fv(_kv: u32) -> bool {
+ true
+}
+
+/// Extract the key in a pair.
+#[inline]
+fn pair_lookup_fk<T>(kv: (u32, T)) -> u32 {
+ kv.0
+}
+
+/// Extract the value in a pair, returning an option.
+#[inline]
+fn pair_lookup_fv_opt<T>(kv: (u32, T)) -> Option<T> {
+ Some(kv.1)
+}