1 files changed, 48 insertions, 0 deletions
diff --git a/src/jpg/huffman-table.zig b/src/jpg/huffman-table.zig
new file mode 100644
index 0000000..8d653ab
--- /dev/null
+++ b/src/jpg/huffman-table.zig
@@ -0,0 +1,48 @@
+const std = @import("std");
+
+const Self = @This();
+
+class: u4,
+destination_identifier: u4,
+codes_count: [16]u8,
+values: [16][]u8,
+
+pub fn read(gpa: std.mem.Allocator, reader: *std.Io.Reader) !Self {
+    const kind = try reader.takeByte();
+    var self: Self = undefined;
+
+    self.class = @truncate(kind >> 4);
+    self.destination_identifier = @truncate(kind);
+
+    for (self.codes_count[0..]) |*count| {
+        count.* = try reader.takeByte();
+    }
+
+    for (self.values[0..], self.codes_count) |*values, count| {
+        values.* = try gpa.alloc(u8, count);
+
+        for (values.*) |*value| {
+            value.* = try reader.takeByte();
+        }
+    }
+
+    return self;
+}
+
+pub fn deinit(self: *Self, gpa: std.mem.Allocator) void {
+    for (self.values) |value| {
+        gpa.free(value);
+    }
+
+    self.* = undefined;
+}
+
+pub fn size_in_file(self: Self) usize {
+    var size: usize = 17;
+
+    for (self.codes_count) |count| {
+        size += count;
+    }
+
+    return size;
+}