init

I will never get tired of vendoring dependencies. ha ha. It is possible
I am insane. I had to do a lot of pruning to get these not to be
ridiculous (especially the unicode data, which had nearly 1 million
lines of... stuff).

deps/zg/src/GenCatData.zig

@@ -0,0 +1,171 @@
+const std = @import("std");
+const builtin = @import("builtin");
+const compress = std.compress;
+const mem = std.mem;
+
+/// General Category
+pub 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
+};
+
+allocator: mem.Allocator,
+s1: []u16 = undefined,
+s2: []u5 = undefined,
+s3: []u5 = undefined,
+
+const Self = @This();
+
+pub fn init(allocator: mem.Allocator) !Self {
+    const decompressor = compress.flate.inflate.decompressor;
+    const in_bytes = @embedFile("gencat");
+    var in_fbs = std.io.fixedBufferStream(in_bytes);
+    var in_decomp = decompressor(.raw, in_fbs.reader());
+    var reader = in_decomp.reader();
+
+    const endian = builtin.cpu.arch.endian();
+
+    var self = Self{ .allocator = allocator };
+
+    const s1_len: u16 = try reader.readInt(u16, endian);
+    self.s1 = try allocator.alloc(u16, s1_len);
+    errdefer allocator.free(self.s1);
+    for (0..s1_len) |i| self.s1[i] = try reader.readInt(u16, endian);
+
+    const s2_len: u16 = try reader.readInt(u16, endian);
+    self.s2 = try allocator.alloc(u5, s2_len);
+    errdefer allocator.free(self.s2);
+    for (0..s2_len) |i| self.s2[i] = @intCast(try reader.readInt(u8, endian));
+
+    const s3_len: u16 = try reader.readInt(u8, endian);
+    self.s3 = try allocator.alloc(u5, s3_len);
+    errdefer allocator.free(self.s3);
+    for (0..s3_len) |i| self.s3[i] = @intCast(try reader.readInt(u8, endian));
+
+    return self;
+}
+
+pub fn deinit(self: *const Self) void {
+    self.allocator.free(self.s1);
+    self.allocator.free(self.s2);
+    self.allocator.free(self.s3);
+}
+
+/// Lookup the General Category for `cp`.
+pub fn gc(self: Self, cp: u21) Gc {
+    return @enumFromInt(self.s3[self.s2[self.s1[cp >> 8] + (cp & 0xff)]]);
+}
+
+/// True if `cp` has an C general category.
+pub fn isControl(self: Self, cp: u21) bool {
+    return switch (self.gc(cp)) {
+        .Cc,
+        .Cf,
+        .Cn,
+        .Co,
+        .Cs,
+        => true,
+        else => false,
+    };
+}
+
+/// True if `cp` has an L general category.
+pub fn isLetter(self: Self, cp: u21) bool {
+    return switch (self.gc(cp)) {
+        .Ll,
+        .Lm,
+        .Lo,
+        .Lu,
+        .Lt,
+        => true,
+        else => false,
+    };
+}
+
+/// True if `cp` has an M general category.
+pub fn isMark(self: Self, cp: u21) bool {
+    return switch (self.gc(cp)) {
+        .Mc,
+        .Me,
+        .Mn,
+        => true,
+        else => false,
+    };
+}
+
+/// True if `cp` has an N general category.
+pub fn isNumber(self: Self, cp: u21) bool {
+    return switch (self.gc(cp)) {
+        .Nd,
+        .Nl,
+        .No,
+        => true,
+        else => false,
+    };
+}
+
+/// True if `cp` has an P general category.
+pub fn isPunctuation(self: Self, cp: u21) bool {
+    return switch (self.gc(cp)) {
+        .Pc,
+        .Pd,
+        .Pe,
+        .Pf,
+        .Pi,
+        .Po,
+        .Ps,
+        => true,
+        else => false,
+    };
+}
+
+/// True if `cp` has an S general category.
+pub fn isSymbol(self: Self, cp: u21) bool {
+    return switch (self.gc(cp)) {
+        .Sc,
+        .Sk,
+        .Sm,
+        .So,
+        => true,
+        else => false,
+    };
+}
+
+/// True if `cp` has an Z general category.
+pub fn isSeparator(self: Self, cp: u21) bool {
+    return switch (self.gc(cp)) {
+        .Zl,
+        .Zp,
+        .Zs,
+        => true,
+        else => false,
+    };
+}