/
big.go
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/
big.go
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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library 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 go-ethereum library 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 go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package common
import (
"math"
"math/big"
)
// Common big integers often used
var (
Big1 = big.NewInt(1)
Big2 = big.NewInt(2)
Big3 = big.NewInt(3)
Big0 = big.NewInt(0)
Big32 = big.NewInt(32)
Big256 = big.NewInt(256)
Big257 = big.NewInt(257)
BigMaxUint64 = new(big.Int).SetUint64(math.MaxUint64)
)
// MarshalBigInt marshalls big int into text string for consistent encoding
func MarshalBigInt(i *big.Int) (string, error) {
bz, err := i.MarshalText()
if err != nil {
return "", err
}
return string(bz), nil
}
// MustMarshalBigInt marshalls big int into text string for consistent encoding.
// It panics if an error is encountered.
func MustMarshalBigInt(i *big.Int) string {
str, err := MarshalBigInt(i)
if err != nil {
panic(err)
}
return str
}
// UnmarshalBigInt unmarshalls string from *big.Int
func UnmarshalBigInt(s string) (*big.Int, error) {
ret := new(big.Int)
err := ret.UnmarshalText([]byte(s))
if err != nil {
return nil, err
}
return ret, nil
}
// MustUnmarshalBigInt unmarshalls string from *big.Int.
// It panics if an error is encountered.
func MustUnmarshalBigInt(s string) *big.Int {
ret, err := UnmarshalBigInt(s)
if err != nil {
panic(err)
}
return ret
}