forked from TrueCloudLab/neoneo-go
62 lines
1.3 KiB
Go
62 lines
1.3 KiB
Go
package fixed8
|
|
|
|
import (
|
|
"errors"
|
|
"fmt"
|
|
"strconv"
|
|
)
|
|
|
|
const (
|
|
decimals = 100000000
|
|
)
|
|
|
|
var errInvalidString = errors.New("Fixed8 must satisfy following regex \\d+(\\.\\d{1,8})?")
|
|
|
|
// Fixed8 represents a fixed-point number with precision 10^-8.
|
|
type Fixed8 int64
|
|
|
|
// String implements the Stringer interface.
|
|
func (f Fixed8) String() string {
|
|
val := f.Value()
|
|
return strconv.FormatFloat(val, 'f', -1, 64)
|
|
}
|
|
|
|
// Value returns the original value representing the Fixed8.
|
|
func (f Fixed8) Value() float64 {
|
|
return float64(f) / float64(decimals)
|
|
}
|
|
|
|
// Add adds two Fixed8 values together
|
|
func (f Fixed8) Add(val Fixed8) Fixed8 {
|
|
a := int64(f.Value())
|
|
b := int64(val.Value())
|
|
c := a + b
|
|
return FromInt(c)
|
|
}
|
|
|
|
//Sub subtracts two fixed values from each other
|
|
func (f Fixed8) Sub(val Fixed8) Fixed8 {
|
|
a := int64(f.Value())
|
|
b := int64(val.Value())
|
|
c := a - b
|
|
return FromInt(c)
|
|
}
|
|
|
|
//FromInt returns a Fixed8 objects from an int64
|
|
func FromInt(val int64) Fixed8 {
|
|
return Fixed8(val * decimals)
|
|
}
|
|
|
|
// FromFloat returns a Fixed8 object from a float64
|
|
func FromFloat(val float64) Fixed8 {
|
|
return Fixed8(val * decimals)
|
|
}
|
|
|
|
// FromString returns a Fixed8 object from a string
|
|
func FromString(val string) (Fixed8, error) {
|
|
res, err := strconv.ParseFloat(val, 64)
|
|
if err != nil {
|
|
return 0, fmt.Errorf("failed at parsing string %s", val)
|
|
}
|
|
return FromFloat(res), nil
|
|
}
|