如何在Go中编写LEB128

import (
    "io"
    "math"
)

func encodeLEB128(w io.Writer, value uint64) error {
    for {
        b := byte(value & 0x7F)
        value >>= 7
        if value != 0 {
            b |= 0x80
        }
        if _, err := w.Write([]byte{b}); err != nil {
            return err
        }
        if value == 0 {
            break
        }
    }
    return nil
}

func decodeLEB128(r io.Reader) (uint64, error) {
    var result uint64
    var shift uint
    for {
        b := make([]byte, 1)
        if _, err := r.Read(b); err != nil {
            return 0, err
        }
        value := uint64(b[0] & 0x7F)
        result |= value << shift
        shift += 7
        if b[0]&0x80 == 0 {
            break
        }
    }
    return result, nil
}