// 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 (
"fmt"
"math/big"
)
type StorageSize float64
func (self StorageSize) String() string {
if self > 1000000 {
return fmt.Sprintf("%.2f mB", self/1000000)
} else if self > 1000 {
return fmt.Sprintf("%.2f kB", self/1000)
} else {
return fmt.Sprintf("%.2f B", self)
}
}
func (self StorageSize) Int64() int64 {
return int64(self)
}
// The different number of units
var (
Douglas = BigPow(10, 42)
Einstein = BigPow(10, 21)
Ether = BigPow(10, 18)
Finney = BigPow(10, 15)
Szabo = BigPow(10, 12)
Shannon = BigPow(10, 9)
Babbage = BigPow(10, 6)
Ada = BigPow(10, 3)
Wei = big.NewInt(1)
)
//
// Currency to string
// Returns a string representing a human readable format
func CurrencyToString(num *big.Int) string {
var (
fin *big.Int = num
denom string = "Wei"
)
switch {
case num.Cmp(Ether) >= 0:
fin = new(big.Int).Div(num, Ether)
denom = "Ether"
case num.Cmp(Finney) >= 0:
fin = new(big.Int).Div(num, Finney)
denom = "Finney"
case num.Cmp(Szabo) >= 0:
fin = new(big.Int).Div(num, Szabo)
denom = "Szabo"
case num.Cmp(Shannon) >= 0:
fin = new(big.Int).Div(num, Shannon)
denom = "Shannon"
case num.Cmp(Babbage) >= 0:
fin = new(big.Int).Div(num, Babbage)
denom = "Babbage"
case num.Cmp(Ada) >= 0:
fin = new(big.Int).Div(num, Ada)
denom = "Ada"
}
// TODO add comment clarifying expected behavior
if len(fin.String()) > 5 {
return fmt.Sprintf("%sE%d %s", fin.String()[0:5], len(fin.String())-5, denom)
}
return fmt.Sprintf("%v %s", fin, denom)
}
