pub const Zstandard = struct {
    pub const magic_number = 0xFD2FB528;

    header: Header,
    data_blocks: []Block,
    checksum: ?u32,

    pub const Header = struct {
        descriptor: Descriptor,
        window_descriptor: ?u8,
        dictionary_id: ?u32,
        content_size: ?u64,

        pub const Descriptor = packed struct {
            dictionary_id_flag: u2,
            content_checksum_flag: bool,
            reserved: bool,
            unused: bool,
            single_segment_flag: bool,
            content_size_flag: u2,
        };
    };

    pub const Block = struct {
        pub const Header = struct {
            last_block: bool,
            block_type: Block.Type,
            block_size: u21,
        };

        pub const Type = enum(u2) {
            raw,
            rle,
            compressed,
            reserved,
        };
    };
}