Support json unmarshaller for fixedpoint

This commit is contained in:
c9s 2020-10-24 18:21:43 +08:00
parent 944b673626
commit 3721714f00

View File

@ -1,8 +1,11 @@
package fixedpoint
import (
"encoding/json"
"math"
"strconv"
"github.com/pkg/errors"
)
const DefaultPrecision = 8
@ -39,6 +42,33 @@ func (v Value) Add(v2 Value) Value {
return Value(int64(v) + int64(v2))
}
func (v *Value) UnmarshalJSON(data []byte) error {
var a interface{}
var err = json.Unmarshal(data, &a)
if err != nil {
return err
}
switch d := a.(type) {
case float64:
*v = NewFromFloat(d)
case float32:
*v = NewFromFloat32(d)
case int:
*v = NewFromInt(d)
case int64:
*v = NewFromInt64(d)
default:
return errors.Errorf("unsupported type: %T %v", d, d)
}
return nil
}
func NewFromString(input string) (Value, error) {
v, err := strconv.ParseFloat(input, 64)
if err != nil {
@ -52,6 +82,10 @@ func NewFromFloat(val float64) Value {
return Value(int64(math.Round(val * DefaultPow)))
}
func NewFromFloat32(val float32) Value {
return Value(int64(math.Round(float64(val) * DefaultPow)))
}
func NewFromInt(val int) Value {
return Value(int64(val * DefaultPow))
}