package encoding/binary
ReadVarint reads an encoded signed integer from r (1st parameter) and returns it as an int64.
Golang encoding/binary.ReadVarint() function usage example
package main
import (
"bytes"
"encoding/binary"
"fmt"
)
func main() {
var emptybuf []byte
var buf []byte = []byte{144, 192, 192, 129, 132, 136, 140, 144, 16, 0, 1, 1}
var overflowbuf []byte = []byte{144, 192, 192, 129, 132, 136, 140, 144, 192, 192, 1, 1}
num, err := binary.ReadVarint(bytes.NewBuffer(emptybuf))
fmt.Println(num, err)
num, err = binary.ReadVarint(bytes.NewBuffer(buf))
fmt.Println(num, err)
num, err = binary.ReadVarint(bytes.NewBuffer(overflow))
fmt.Println(num, err)
}
Output :
0 EOF
580990878187261960
2310373135097532424 binary: varint overflows a 64-bit integer
Reference :
http://golang.org/pkg/encoding/binary/#ReadVarint
