Revised VarintEncode function

write_varint_snippet.go

func VarintEncode(w io.Writer, v uint64) error {
    bs := make([]byte, 0, 10)

    for (v & 0xffffffffffffff80) != 0 {
        bs = append(bs, byte((v&0x7f)|0x80))
        v >>= 7
    }
    bs = append(bs, byte(v&0x7f))

    n, err := w.Write(bs)
    if err != nil {
        return oerror.NewTrace(err)
    }
    if n != len(bs) {
        return fmt.Errorf("Incorrect number of bytes written. "+
            "Expected %d. Actual %d", len(bs), n)
    }
    return nil
}