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scalar_const_float64.go
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/* -*- mode: go; -*-
*
* Copyright (C) 2015-2020 Philipp Benner
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* -------------------------------------------------------------------------- */
/* -------------------------------------------------------------------------- */
package autodiff
/* -------------------------------------------------------------------------- */
import "fmt"
import "encoding/json"
import "math"
import "reflect"
/* -------------------------------------------------------------------------- */
type ConstFloat64 float64
/* register scalar type
* -------------------------------------------------------------------------- */
var ConstFloat64Type ScalarType = NewConstFloat64(0.0).Type()
func init() {
f := func(value float64) ConstScalar { return NewConstFloat64(float64(value)) }
RegisterConstScalar(ConstFloat64Type, f)
}
/* constructors
* -------------------------------------------------------------------------- */
func NewConstFloat64(v float64) ConstFloat64 {
return ConstFloat64(v)
}
func NullConstFloat64() ConstFloat64 {
return ConstFloat64(0.0)
}
/* -------------------------------------------------------------------------- */
func (a ConstFloat64) Clone() ConstFloat64 {
return ConstFloat64(a)
}
func (a ConstFloat64) CloneConstScalar() ConstScalar {
return a.Clone()
}
/* -------------------------------------------------------------------------- */
func (a ConstFloat64) Type() ScalarType {
return reflect.TypeOf(a)
}
/* type conversion
* -------------------------------------------------------------------------- */
func (a ConstFloat64) ConvertConstScalar(t ScalarType) ConstScalar {
switch t {
case ConstFloat64Type:
return a
default:
return NewConstScalar(t, a.GetFloat64())
}
}
/* stringer
* -------------------------------------------------------------------------- */
func (a ConstFloat64) String() string {
return fmt.Sprintf("%v", a.GetFloat64())
}
/* read access
* -------------------------------------------------------------------------- */
func (a ConstFloat64) GetInt8() int8 {
return int8(a)
}
func (a ConstFloat64) GetInt16() int16 {
return int16(a)
}
func (a ConstFloat64) GetInt32() int32 {
return int32(a)
}
func (a ConstFloat64) GetInt64() int64 {
return int64(a)
}
func (a ConstFloat64) GetInt() int {
return int(a)
}
func (a ConstFloat64) GetFloat32() float32 {
return float32(a)
}
func (a ConstFloat64) GetFloat64() float64 {
return float64(a)
}
func (a ConstFloat64) GetOrder() int {
return 0
}
func (a ConstFloat64) GetDerivative(i int) float64 {
return 0.0
}
func (a ConstFloat64) GetHessian(i, j int) float64 {
return 0.0
}
func (a ConstFloat64) GetN() int {
return 0
}
/* json
* -------------------------------------------------------------------------- */
func (obj ConstFloat64) MarshalJSON() ([]byte, error) {
return json.Marshal(obj)
}
/* math
* -------------------------------------------------------------------------- */
func (a ConstFloat64) Equals(b ConstScalar, epsilon float64) bool {
v1 := a.GetFloat64()
v2 := b.GetFloat64()
return math.Abs(v1 - v2) < epsilon ||
(math.IsNaN(v1) && math.IsNaN(v2)) ||
(math.IsInf(v1, 1) && math.IsInf(v2, 1)) ||
(math.IsInf(v1, -1) && math.IsInf(v2, -1))
}
/* -------------------------------------------------------------------------- */
func (a ConstFloat64) Greater(b ConstScalar) bool {
return a.GetFloat64() > b.GetFloat64()
}
/* -------------------------------------------------------------------------- */
func (a ConstFloat64) Smaller(b ConstScalar) bool {
return a.GetFloat64() < b.GetFloat64()
}
/* -------------------------------------------------------------------------- */
func (a ConstFloat64) Sign() int {
if a.GetFloat64() < float64(0) {
return -1
}
if a.GetFloat64() > float64(0) {
return 1
}
return 0
}