1 files changed, 206 insertions, 0 deletions

diff --git a/codegen/grapheme_break.zig b/codegen/grapheme_break.zig
new file mode 100644
index 0000000..ace875c
--- /dev/null
+++ b/codegen/grapheme_break.zig
@@ -0,0 +1,206 @@
+const std = @import("std");
+
+const gbp = @import("ziglyph").grapheme_break;
+
+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;
+    }
+};
+
+const block_size = 256;
+const Block = [block_size]u4;
+
+const BlockMap = std.HashMap(
+    Block,
+    u16,
+    struct {
+        pub fn hash(_: @This(), k: Block) u64 {
+            var hasher = std.hash.Wyhash.init(0);
+            std.hash.autoHashStrat(&hasher, k, .DeepRecursive);
+            return hasher.final();
+        }
+
+        pub fn eql(_: @This(), a: Block, b: Block) bool {
+            return std.mem.eql(u4, &a, &b);
+        }
+    },
+    std.hash_map.default_max_load_percentage,
+);
+
+pub fn main() !void {
+    var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
+    defer arena.deinit();
+    const allocator = arena.allocator();
+
+    var blocks_map = BlockMap.init(allocator);
+    defer blocks_map.deinit();
+
+    var stage1 = std.ArrayList(u16).init(allocator);
+    defer stage1.deinit();
+
+    var stage2 = std.ArrayList(u4).init(allocator);
+    defer stage2.deinit();
+
+    var stage3 = std.ArrayList(Prop).init(allocator);
+    defer stage3.deinit();
+
+    var block: Block = [_]u4{0} ** block_size;
+    var block_len: u16 = 0;
+
+    for (0..0x10ffff + 1) |cp| {
+        const prop = Prop.forCodePoint(@intCast(cp));
+
+        const block_idx = blk: {
+            for (stage3.items, 0..) |item, i| {
+                if (item == prop) break :blk i;
+            }
+
+            const idx = stage3.items.len;
+            try stage3.append(prop);
+            break :blk idx;
+        };
+
+        block[block_len] = @intCast(block_idx);
+        block_len += 1;
+
+        if (block_len < block_size and cp != 0x10ffff) continue;
+
+        const gop = try blocks_map.getOrPut(block);
+        if (!gop.found_existing) {
+            gop.value_ptr.* = @intCast(stage2.items.len);
+            try stage2.appendSlice(&block);
+        }
+
+        try stage1.append(gop.value_ptr.*);
+        block_len = 0;
+    }
+
+    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.print("const stage_1 = [{}]u16{{", .{stage1.items.len});
+    for (stage1.items) |v| {
+        _ = try writer.print("{},", .{v});
+    }
+    try writer.writeAll("};\n");
+
+    try writer.print("const stage_2 = [{}]u4{{", .{stage2.items.len});
+    for (stage2.items) |v| {
+        _ = try writer.print("{},", .{v});
+    }
+    try writer.writeAll("};\n");
+
+    try writer.print("const stage_3 = [{}]Prop{{", .{stage3.items.len});
+    for (stage3.items) |v| {
+        _ = 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();
+}