    const std = @import("../std.zig");
    const io = std.io;
    const assert = std.debug.assert;
    const testing = std.testing;

    pub fn LimitedReader(comptime ReaderType: type) type {
        return struct {
            inner_reader: ReaderType,
            bytes_left: u64,

            pub const Error = ReaderType.Error;
            pub const Reader = io.Reader(*Self, Error, read);

            const Self = @This();

            pub fn read(self: *Self, dest: []u8) Error!usize {
                const max_read = @min(self.bytes_left, dest.len);
                const n = try self.inner_reader.read(dest[0..max_read]);
                self.bytes_left -= n;
                return n;
            }

            pub fn reader(self: *Self) Reader {
                return .{ .context = self };
            }
        };
    }

    /// Returns an initialised `LimitedReader`
    /// `bytes_left` is a `u64` to be able to take 64 bit file offsets
    pub fn limitedReader(inner_reader: anytype, bytes_left: u64) LimitedReader(@TypeOf(inner_reader)) {
        return .{ .inner_reader = inner_reader, .bytes_left = bytes_left };
    }

    test "basic usage" {
        const data = "hello world";
        var fbs = std.io.fixedBufferStream(data);
        var early_stream = limitedReader(fbs.reader(), 3);

        var buf: [5]u8 = undefined;
        try testing.expectEqual(@as(usize, 3), try early_stream.reader().read(&buf));
        try testing.expectEqualSlices(u8, data[0..3], buf[0..3]);
        try testing.expectEqual(@as(usize, 0), try early_stream.reader().read(&buf));
        try testing.expectError(error.EndOfStream, early_stream.reader().skipBytes(10, .{}));
    }