forked from ontio/ontology
/
uint256.go
80 lines (67 loc) · 1.81 KB
/
uint256.go
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/*
* Copyright (C) 2018 The ontology Authors
* This file is part of The ontology library.
*
* The ontology is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The ontology 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with The ontology. If not, see <http://www.gnu.org/licenses/>.
*/
package common
import (
"errors"
"fmt"
"io"
)
const (
UINT16_SIZE = 2
UINT32_SIZE = 4
UINT64_SIZE = 8
UINT256_SIZE = 32
)
type Uint256 [UINT256_SIZE]byte
var UINT256_EMPTY = Uint256{}
func (u *Uint256) ToArray() []byte {
x := make([]byte, UINT256_SIZE)
for i := 0; i < 32; i++ {
x[i] = byte(u[i])
}
return x
}
func (u *Uint256) ToHexString() string {
return fmt.Sprintf("%x", ToArrayReverse(u[:]))
}
func (u *Uint256) Serialize(w io.Writer) error {
_, err := w.Write(u[:])
return err
}
func (u *Uint256) Deserialize(r io.Reader) error {
_, err := io.ReadFull(r, u[:])
if err != nil {
return errors.New("deserialize Uint256 error")
}
return nil
}
func Uint256ParseFromBytes(f []byte) (Uint256, error) {
if len(f) != UINT256_SIZE {
return Uint256{}, errors.New("[Common]: Uint256ParseFromBytes err, len != 32")
}
var hash Uint256
copy(hash[:], f)
return hash, nil
}
func Uint256FromHexString(s string) (Uint256, error) {
hx, err := HexToBytes(s)
if err != nil {
return UINT256_EMPTY, err
}
return Uint256ParseFromBytes(ToArrayReverse(hx))
}