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const std = @import("std");
const emoji = @import("ziglyph").emoji;
const block_size = 256;
const Block = [block_size]bool;
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(bool, &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(bool).init(allocator);
defer stage2.deinit();
var block: Block = [_]bool{false} ** block_size;
var block_len: u16 = 0;
for (0..0x10ffff + 1) |cp| {
const isEmoji = emoji.isExtendedPictographic(@intCast(cp));
block[block_len] = isEmoji;
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();
try writer.print("pub const stage_1 = [{}]u16{{", .{stage1.items.len});
for (stage1.items) |v| {
_ = try writer.print("{},", .{v});
}
try writer.writeAll("};\n");
try writer.print("pub const stage_2 = [{}]bool{{", .{stage2.items.len});
for (stage2.items) |v| {
_ = try writer.print("{},", .{v});
}
try writer.writeAll("};\n");
try out_buf.flush();
}
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