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const std = @import("std");
const gbp = @import("ziglyph").grapheme_break;
const Map = struct {
store: [12]Prop = [_]Prop{.none} ** 12,
len: u8 = 0,
fn getOrPut(self: *Map, prop: Prop) usize {
var index: ?usize = null;
for (0..self.store.len) |i| {
if (self.store[i] == prop) index = i;
}
if (index) |idx| {
return idx;
} else {
self.store[self.len] = prop;
self.len += 1;
return self.len - 1;
}
}
};
const Prop = enum {
none,
control,
extend,
hangul_l,
hangul_lv,
hangul_lvt,
hangul_v,
hangul_t,
prepend,
regional,
spacing,
zwj,
fn forCodePoint(cp: u21) Prop {
if (gbp.isControl(cp)) return .control;
if (gbp.isExtend(cp)) return .extend;
if (gbp.isL(cp)) return .hangul_l;
if (gbp.isLv(cp)) return .hangul_lv;
if (gbp.isLvt(cp)) return .hangul_lvt;
if (gbp.isT(cp)) return .hangul_t;
if (gbp.isV(cp)) return .hangul_v;
if (gbp.isPrepend(cp)) return .prepend;
if (gbp.isRegionalIndicator(cp)) return .regional;
if (gbp.isSpacingmark(cp)) return .spacing;
if (gbp.isZwj(cp)) return .zwj;
return .none;
}
};
pub fn main() !void {
var stage_1: [4352]u21 = undefined;
var stage_2: [1_114_112]u4 = undefined;
var stage_3 = Map{};
var current_block_offset: u21 = 0;
for (0..0x10ffff + 1) |i| {
const cp: u21 = @intCast(i);
const stage_1_index = cp >> 8;
const stage_2_index = current_block_offset + (cp & 0xff);
const stage_3_index = stage_3.getOrPut(Prop.forCodePoint(cp));
stage_1[stage_1_index] = current_block_offset;
stage_2[stage_2_index] = @intCast(stage_3_index);
if (cp & 0xff == 255) current_block_offset += 256;
}
var args_iter = std.process.args();
_ = args_iter.skip();
const output_path = args_iter.next() orelse @panic("No output file arg!");
var out_file = try std.fs.cwd().createFile(output_path, .{});
defer out_file.close();
var out_buf = std.io.bufferedWriter(out_file.writer());
const writer = out_buf.writer();
const prop_code =
\\const Prop = enum {
\\ none,
\\
\\ control,
\\ extend,
\\ hangul_l,
\\ hangul_lv,
\\ hangul_lvt,
\\ hangul_v,
\\ hangul_t,
\\ prepend,
\\ regional,
\\ spacing,
\\ zwj,
\\};
\\
;
try writer.writeAll(prop_code);
try writer.writeAll("const stage_1 = [_]u21{");
for (stage_1, 0..) |v, i| {
if (i != 0) try writer.writeByte(',');
_ = try writer.print("{}", .{v});
}
try writer.writeAll("};\n");
try writer.writeAll("const stage_2 = [_]u4{");
for (stage_2, 0..) |v, i| {
if (i != 0) try writer.writeByte(',');
_ = try writer.print("{}", .{v});
}
try writer.writeAll("};\n");
try writer.writeAll("const stage_3 = [_]Prop{");
for (stage_3.store, 0..) |v, i| {
if (i != 0) try writer.writeByte(',');
_ = try writer.print(".{s}", .{@tagName(v)});
}
try writer.writeAll("};\n");
const code =
\\inline fn getProp(cp: u21) Prop {
\\ const stage_1_index = cp >> 8;
\\ const stage_2_index = stage_1[stage_1_index] + (cp & 0xff);
\\ const stage_3_index = stage_2[stage_2_index];
\\ return stage_3[stage_3_index];
\\}
\\
\\pub inline fn isControl(cp: u21) bool {
\\ return getProp(cp) == .control;
\\}
\\
\\pub inline fn isExtend(cp: u21) bool {
\\ return getProp(cp) == .extend;
\\}
\\
\\pub inline fn isL(cp: u21) bool {
\\ return getProp(cp) == .hangul_l;
\\}
\\pub inline fn isLv(cp: u21) bool {
\\ return getProp(cp) == .hangul_lv;
\\}
\\pub inline fn isLvt(cp: u21) bool {
\\ return getProp(cp) == .hangul_lvt;
\\}
\\pub inline fn isV(cp: u21) bool {
\\ return getProp(cp) == .hangul_v;
\\}
\\pub inline fn isT(cp: u21) bool {
\\ return getProp(cp) == .hangul_t;
\\}
\\
\\pub inline fn isPrepend(cp: u21) bool {
\\ return getProp(cp) == .prepend;
\\}
\\
\\pub inline fn isRegionalIndicator(cp: u21) bool {
\\ return getProp(cp) == .regional;
\\}
\\
\\pub inline fn isSpacingmark(cp: u21) bool {
\\ return getProp(cp) == .spacing;
\\}
\\
\\pub inline fn isZwj(cp: u21) bool {
\\ return getProp(cp) == .zwj;
\\}
\\
;
try writer.writeAll(code);
try out_buf.flush();
}
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