1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
|
const std = @import("std");
const builtin = @import("builtin");
pub fn main() !void {
var arena = std.heap.ArenaAllocator.init(std.heap.page_allocator);
defer arena.deinit();
const allocator = arena.allocator();
// Process UnicodeData.txt
var in_file = try std.fs.cwd().openFile("data/unicode/UnicodeData.txt", .{});
defer in_file.close();
var in_buf = std.io.bufferedReader(in_file.reader());
const in_reader = in_buf.reader();
var args_iter = try std.process.argsWithAllocator(allocator);
defer args_iter.deinit();
_ = args_iter.skip();
const output_path = args_iter.next() orelse @panic("No output file arg!");
const compressor = std.compress.flate.deflate.compressor;
var out_file = try std.fs.cwd().createFile(output_path, .{});
defer out_file.close();
var out_comp = try compressor(.raw, out_file.writer(), .{ .level = .best });
const writer = out_comp.writer();
const endian = builtin.cpu.arch.endian();
var line_buf: [4096]u8 = undefined;
lines: while (try in_reader.readUntilDelimiterOrEof(&line_buf, '\n')) |line| {
if (line.len == 0) continue;
var field_iter = std.mem.splitScalar(u8, line, ';');
var cp: i24 = undefined;
var i: usize = 0;
while (field_iter.next()) |field| : (i += 1) {
switch (i) {
0 => cp = try std.fmt.parseInt(i24, field, 16),
2 => if (line[0] == '<') continue :lines,
12 => {
// Simple uppercase mapping
if (field.len == 0) continue :lines;
try writer.writeInt(i24, cp, endian);
const mapping = try std.fmt.parseInt(i24, field, 16);
try writer.writeInt(i24, mapping - cp, endian);
},
else => {},
}
}
}
try writer.writeInt(u24, 0, endian);
try out_comp.flush();
}
|
