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add two LUT-based implementations of isSymbol

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This commit is contained in:
Jeffrey C. Ollie
2025-09-04 23:04:08 -05:00
parent 968b9d536d
commit a7da96faee
13 changed files with 634 additions and 25 deletions
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26
src/unicode/lut.zig
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@@ -142,6 +142,32 @@ pub fn Tables(comptime Elem: type) type {
return self.stage3[self.stage2[self.stage1[high] + low]];
}
pub inline fn getInline(self: *const Self, cp: u21) Elem {
const high = cp >> 8;
const low = cp & 0xFF;
return self.stage3[self.stage2[self.stage1[high] + low]];
}
pub fn getBool(self: *const Self, cp: u21) bool {
assert(Elem == bool);
assert(self.stage3.len == 2);
assert(self.stage3[0] == false);
assert(self.stage3[1] == true);
const high = cp >> 8;
const low = cp & 0xFF;
return self.stage2[self.stage1[high] + low] != 0;
}
pub inline fn getBoolInline(self: *const Self, cp: u21) bool {
assert(Elem == bool);
assert(self.stage3.len == 2);
assert(self.stage3[0] == false);
assert(self.stage3[1] == true);
const high = cp >> 8;
const low = cp & 0xFF;
return self.stage2[self.stage1[high] + low] != 0;
}
/// Writes the lookup table as Zig to the given writer. The
/// written file exports three constants: stage1, stage2, and
/// stage3. These can be used to rebuild the lookup table in Zig.