plugeth/ethutil/common.go

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package ethutil
import (
"fmt"
"math/big"
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"runtime"
"time"
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)
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func IsWindows() bool {
return runtime.GOOS == "windows"
}
func WindonizePath(path string) string {
if string(path[0]) == "/" && IsWindows() {
path = path[1:]
}
return path
}
// The different number of units
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var (
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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)
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)
//
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// Currency to string
// Returns a string representing a human readable format
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func CurrencyToString(num *big.Int) string {
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var (
fin *big.Int = num
denom string = "Wei"
)
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switch {
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case num.Cmp(Douglas) >= 0:
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fin = new(big.Int).Div(num, Douglas)
denom = "Douglas"
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case num.Cmp(Einstein) >= 0:
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fin = new(big.Int).Div(num, Einstein)
denom = "Einstein"
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case num.Cmp(Ether) >= 0:
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fin = new(big.Int).Div(num, Ether)
denom = "Ether"
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case num.Cmp(Finney) >= 0:
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fin = new(big.Int).Div(num, Finney)
denom = "Finney"
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case num.Cmp(Szabo) >= 0:
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fin = new(big.Int).Div(num, Szabo)
denom = "Szabo"
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case num.Cmp(Shannon) >= 0:
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fin = new(big.Int).Div(num, Shannon)
denom = "Shannon"
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case num.Cmp(Babbage) >= 0:
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fin = new(big.Int).Div(num, Babbage)
denom = "Babbage"
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case num.Cmp(Ada) >= 0:
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fin = new(big.Int).Div(num, Ada)
denom = "Ada"
}
// TODO add comment clarifying expected behavior
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if len(fin.String()) > 5 {
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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}
// Common big integers often used
var (
Big1 = big.NewInt(1)
Big2 = big.NewInt(2)
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Big3 = big.NewInt(3)
Big0 = big.NewInt(0)
BigTrue = Big1
BigFalse = Big0
Big32 = big.NewInt(32)
Big256 = big.NewInt(0xff)
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Big257 = big.NewInt(257)
)
func Bench(pre string, cb func()) {
start := time.Now()
cb()
fmt.Println(pre, ": took:", time.Since(start))
}