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//! Combining Class Data
s1: []u16 = undefined,
s2: []u8 = undefined,
const CombiningData = @This();
pub fn init(allocator: mem.Allocator) !CombiningData {
const decompressor = compress.flate.inflate.decompressor;
const in_bytes = @embedFile("ccc");
var in_fbs = std.io.fixedBufferStream(in_bytes);
var in_decomp = decompressor(.raw, in_fbs.reader());
var reader = in_decomp.reader();
const endian = builtin.cpu.arch.endian();
var cbdata = CombiningData{};
const stage_1_len: u16 = try reader.readInt(u16, endian);
cbdata.s1 = try allocator.alloc(u16, stage_1_len);
errdefer allocator.free(cbdata.s1);
for (0..stage_1_len) |i| cbdata.s1[i] = try reader.readInt(u16, endian);
const stage_2_len: u16 = try reader.readInt(u16, endian);
cbdata.s2 = try allocator.alloc(u8, stage_2_len);
errdefer allocator.free(cbdata.s2);
_ = try reader.readAll(cbdata.s2);
return cbdata;
}
pub fn deinit(cbdata: *const CombiningData, allocator: mem.Allocator) void {
allocator.free(cbdata.s1);
allocator.free(cbdata.s2);
}
/// Returns the canonical combining class for a code point.
pub fn ccc(cbdata: CombiningData, cp: u21) u8 {
return cbdata.s2[cbdata.s1[cp >> 8] + (cp & 0xff)];
}
/// True if `cp` is a starter code point, not a combining character.
pub fn isStarter(cbdata: CombiningData, cp: u21) bool {
return cbdata.s2[cbdata.s1[cp >> 8] + (cp & 0xff)] == 0;
}
const std = @import("std");
const builtin = @import("builtin");
const compress = std.compress;
const mem = std.mem;
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