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moneroutil/varint.go
2017-04-27 16:21:44 -07:00

29 lines
473 B
Go

package moneroutil
import (
"bytes"
)
func ReadVarInt(buf *bytes.Buffer) (result uint64, err error) {
var b byte
for i := 0; ; i++ {
b, err = buf.ReadByte()
if err != nil {
return
}
result += (uint64(b) & 0x7f) << uint(i*7)
if uint64(b)&0x80 == 0 {
break
}
}
return
}
func Uint64ToBytes(num uint64) (result []byte) {
for ; num >= 0x80; num >>= 7 {
result = append(result, byte((num&0x7f)|0x80))
}
result = append(result, byte(num))
return
}