65 lines
2.2 KiB
Zig
65 lines
2.2 KiB
Zig
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const std = @import("std");
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const builtin = @import("builtin");
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pub fn main() !void {
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var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
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defer arena.deinit();
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const allocator = arena.allocator();
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// Process UnicodeData.txt
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var in_file = try std.fs.cwd().openFile("data/unicode/UnicodeData.txt", .{});
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defer in_file.close();
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var in_buf = std.io.bufferedReader(in_file.reader());
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const in_reader = in_buf.reader();
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var args_iter = try std.process.argsWithAllocator(allocator);
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defer args_iter.deinit();
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_ = args_iter.skip();
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const output_path = args_iter.next() orelse @panic("No output file arg!");
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const compressor = std.compress.flate.deflate.compressor;
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var out_file = try std.fs.cwd().createFile(output_path, .{});
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defer out_file.close();
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var out_comp = try compressor(.raw, out_file.writer(), .{ .level = .best });
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const writer = out_comp.writer();
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const endian = builtin.cpu.arch.endian();
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var line_buf: [4096]u8 = undefined;
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lines: while (try in_reader.readUntilDelimiterOrEof(&line_buf, '\n')) |line| {
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if (line.len == 0) continue;
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var field_iter = std.mem.splitScalar(u8, line, ';');
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var cps: [19]u24 = undefined;
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var len: u8 = 1;
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var i: usize = 0;
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while (field_iter.next()) |field| : (i += 1) {
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switch (i) {
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0 => cps[0] = try std.fmt.parseInt(u24, field, 16),
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5 => {
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// Not compatibility.
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if (field.len == 0 or field[0] != '<') continue :lines;
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var cp_iter = std.mem.tokenizeScalar(u8, field, ' ');
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_ = cp_iter.next(); // <compat type>
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while (cp_iter.next()) |cp_str| : (len += 1) {
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cps[len] = try std.fmt.parseInt(u24, cp_str, 16);
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}
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},
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2 => if (line[0] == '<') continue :lines,
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else => {},
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}
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}
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try writer.writeInt(u8, @intCast(len), endian);
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for (cps[0..len]) |cp| try writer.writeInt(u24, cp, endian);
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}
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try writer.writeInt(u16, 0, endian);
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try out_comp.flush();
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}
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