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90 lines
2.3 KiB
Go
90 lines
2.3 KiB
Go
// Copyright 2014 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package common
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import (
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"fmt"
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"math/big"
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)
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type StorageSize float64
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func (self StorageSize) String() string {
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if self > 1000000 {
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return fmt.Sprintf("%.2f mB", self/1000000)
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} else if self > 1000 {
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return fmt.Sprintf("%.2f kB", self/1000)
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} else {
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return fmt.Sprintf("%.2f B", self)
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}
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}
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func (self StorageSize) Int64() int64 {
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return int64(self)
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}
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// The different number of units
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var (
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Douglas = BigPow(10, 42)
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Einstein = BigPow(10, 21)
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Ether = BigPow(10, 18)
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Finney = BigPow(10, 15)
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Szabo = BigPow(10, 12)
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Shannon = BigPow(10, 9)
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Babbage = BigPow(10, 6)
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Ada = BigPow(10, 3)
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Wei = big.NewInt(1)
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)
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//
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// Currency to string
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// Returns a string representing a human readable format
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func CurrencyToString(num *big.Int) string {
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var (
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fin *big.Int = num
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denom string = "Wei"
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)
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switch {
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case num.Cmp(Ether) >= 0:
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fin = new(big.Int).Div(num, Ether)
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denom = "Ether"
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case num.Cmp(Finney) >= 0:
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fin = new(big.Int).Div(num, Finney)
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denom = "Finney"
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case num.Cmp(Szabo) >= 0:
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fin = new(big.Int).Div(num, Szabo)
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denom = "Szabo"
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case num.Cmp(Shannon) >= 0:
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fin = new(big.Int).Div(num, Shannon)
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denom = "Shannon"
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case num.Cmp(Babbage) >= 0:
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fin = new(big.Int).Div(num, Babbage)
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denom = "Babbage"
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case num.Cmp(Ada) >= 0:
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fin = new(big.Int).Div(num, Ada)
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denom = "Ada"
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}
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// TODO add comment clarifying expected behavior
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if len(fin.String()) > 5 {
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return fmt.Sprintf("%sE%d %s", fin.String()[0:5], len(fin.String())-5, denom)
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}
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return fmt.Sprintf("%v %s", fin, denom)
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}
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