/
fixed64.go
60 lines (53 loc) · 1.03 KB
/
fixed64.go
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package common
import (
"bytes"
"encoding/binary"
"io"
"strconv"
)
//the 64 bit fixed-point number, precise 10^-8
type Fixed64 int64
func (f *Fixed64) Serialize(w io.Writer) error {
err := binary.Write(w, binary.LittleEndian, int64(*f))
if err != nil {
return err
}
return nil
}
func (f *Fixed64) Deserialize(r io.Reader) error {
p := make([]byte, 8)
n, err := r.Read(p)
if n <= 0 || err != nil {
return err
}
b_buf := bytes.NewBuffer(p)
var x int64
err = binary.Read(b_buf, binary.LittleEndian, &x)
if err != nil {
return err
}
*f = Fixed64(x)
return nil
}
func (f Fixed64) GetData() int64 {
return int64(f)
}
func (f Fixed64) String() string {
var buffer bytes.Buffer
value := uint64(f)
if f < 0 {
buffer.WriteRune('-')
value = uint64(-f)
}
buffer.WriteString(strconv.FormatUint(value/100000000, 10))
value %= 100000000
if value > 0 {
buffer.WriteRune('.')
s := strconv.FormatUint(value, 10)
for i := len(s); i < 8; i++ {
buffer.WriteRune('0')
}
buffer.WriteString(s)
}
return buffer.String()
}