mirror of
https://github.com/c9s/bbgo.git
synced 2024-11-14 02:53:50 +00:00
62 lines
1.0 KiB
Go
62 lines
1.0 KiB
Go
package fixedpoint
|
|
|
|
import (
|
|
"math"
|
|
"strconv"
|
|
)
|
|
|
|
const DefaultPrecision = 8
|
|
|
|
const DefaultPow = 1e8
|
|
|
|
type Value int64
|
|
|
|
func (v Value) Float64() float64 {
|
|
return float64(v) / DefaultPow
|
|
}
|
|
|
|
func (v Value) Int64() int64 {
|
|
return int64(v)
|
|
}
|
|
|
|
func (v Value) Mul(v2 Value) Value {
|
|
return NewFromFloat(v.Float64() * v2.Float64())
|
|
}
|
|
|
|
func (v Value) MulFloat64(v2 float64) Value {
|
|
return NewFromFloat(v.Float64() * v2)
|
|
}
|
|
|
|
func (v Value) Div(v2 Value) Value {
|
|
return NewFromFloat(v.Float64() / v2.Float64())
|
|
}
|
|
|
|
func (v Value) Sub(v2 Value) Value {
|
|
return Value(int64(v) - int64(v2))
|
|
}
|
|
|
|
func (v Value) Add(v2 Value) Value {
|
|
return Value(int64(v) + int64(v2))
|
|
}
|
|
|
|
func NewFromString(input string) (Value, error) {
|
|
v, err := strconv.ParseFloat(input, 64)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
return NewFromFloat(v), nil
|
|
}
|
|
|
|
func NewFromFloat(val float64) Value {
|
|
return Value(int64(math.Round(val * DefaultPow)))
|
|
}
|
|
|
|
func NewFromInt(val int) Value {
|
|
return Value(int64(val * DefaultPow))
|
|
}
|
|
|
|
func NewFromInt64(val int64) Value {
|
|
return Value(val * DefaultPow)
|
|
}
|