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
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
const std = @import("std");
const builtin = @import("builtin");
const Gc = enum {
Cc, // Other, Control
Cf, // Other, Format
Cn, // Other, Unassigned
Co, // Other, Private Use
Cs, // Other, Surrogate
Ll, // Letter, Lowercase
Lm, // Letter, Modifier
Lo, // Letter, Other
Lu, // Letter, Uppercase
Lt, // Letter, Titlecase
Mc, // Mark, Spacing Combining
Me, // Mark, Enclosing
Mn, // Mark, Non-Spacing
Nd, // Number, Decimal Digit
Nl, // Number, Letter
No, // Number, Other
Pc, // Punctuation, Connector
Pd, // Punctuation, Dash
Pe, // Punctuation, Close
Pf, // Punctuation, Final quote (may behave like Ps or Pe depending on usage)
Pi, // Punctuation, Initial quote (may behave like Ps or Pe depending on usage)
Po, // Punctuation, Other
Ps, // Punctuation, Open
Sc, // Symbol, Currency
Sk, // Symbol, Modifier
Sm, // Symbol, Math
So, // Symbol, Other
Zl, // Separator, Line
Zp, // Separator, Paragraph
Zs, // Separator, Space
};
const block_size = 256;
const Block = [block_size]u5;
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(u5, &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 flat_map = std.AutoHashMap(u21, u5).init(allocator);
defer flat_map.deinit();
var line_buf: [4096]u8 = undefined;
// Process DerivedGeneralCategory.txt
var in_file = try std.fs.cwd().openFile("data/unicode/extracted/DerivedGeneralCategory.txt", .{});
defer in_file.close();
var in_buf = std.io.bufferedReader(in_file.reader());
const in_reader = in_buf.reader();
while (try in_reader.readUntilDelimiterOrEof(&line_buf, '\n')) |line| {
if (line.len == 0 or line[0] == '#') continue;
const no_comment = if (std.mem.indexOfScalar(u8, line, '#')) |octo| line[0..octo] else line;
var field_iter = std.mem.tokenizeAny(u8, no_comment, "; ");
var current_code: [2]u21 = undefined;
var i: usize = 0;
while (field_iter.next()) |field| : (i += 1) {
switch (i) {
0 => {
// Code point(s)
if (std.mem.indexOf(u8, field, "..")) |dots| {
current_code = .{
try std.fmt.parseInt(u21, field[0..dots], 16),
try std.fmt.parseInt(u21, field[dots + 2 ..], 16),
};
} else {
const code = try std.fmt.parseInt(u21, field, 16);
current_code = .{ code, code };
}
},
1 => {
// General category
const gc = std.meta.stringToEnum(Gc, field) orelse return error.UnknownGenCat;
for (current_code[0]..current_code[1] + 1) |cp| try flat_map.put(@intCast(cp), @intFromEnum(gc));
},
else => {},
}
}
}
var blocks_map = BlockMap.init(allocator);
defer blocks_map.deinit();
var stage1 = std.ArrayList(u16).init(allocator);
defer stage1.deinit();
var stage2 = std.ArrayList(u5).init(allocator);
defer stage2.deinit();
var stage3 = std.ArrayList(u5).init(allocator);
defer stage3.deinit();
var block: Block = [_]u5{0} ** block_size;
var block_len: u16 = 0;
for (0..0x110000) |i| {
const cp: u21 = @intCast(i);
const gc = flat_map.get(cp).?;
const stage3_idx = blk: {
for (stage3.items, 0..) |gci, j| {
if (gc == gci) break :blk j;
}
try stage3.append(gc);
break :blk stage3.items.len - 1;
};
// Process block
block[block_len] = @intCast(stage3_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 = 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();
try writer.writeInt(u16, @intCast(stage1.items.len), endian);
for (stage1.items) |i| try writer.writeInt(u16, i, endian);
try writer.writeInt(u16, @intCast(stage2.items.len), endian);
for (stage2.items) |i| try writer.writeInt(u8, i, endian);
try writer.writeInt(u8, @intCast(stage3.items.len), endian);
for (stage3.items) |i| try writer.writeInt(u8, i, endian);
try out_comp.flush();
}
|
