153 lines
3.5 KiB
Go
153 lines
3.5 KiB
Go
package ethutil
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import (
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"fmt"
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"math/big"
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"os"
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"os/user"
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"path"
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"path/filepath"
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"runtime"
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"time"
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"github.com/kardianos/osext"
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)
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// MakeName creates a node name that follows the ethereum convention
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// for such names. It adds the operation system name and Go runtime version
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// the name.
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func MakeName(name, version string) string {
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return fmt.Sprintf("%s/v%s/%s/%s", name, version, runtime.GOOS, runtime.Version())
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}
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func DefaultAssetPath() string {
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var assetPath string
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pwd, _ := os.Getwd()
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srcdir := path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "cmd", "mist")
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// If the current working directory is the go-ethereum dir
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// assume a debug build and use the source directory as
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// asset directory.
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if pwd == srcdir {
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assetPath = path.Join(pwd, "assets")
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} else {
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switch runtime.GOOS {
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case "darwin":
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// Get Binary Directory
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exedir, _ := osext.ExecutableFolder()
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assetPath = filepath.Join(exedir, "../Resources")
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case "linux":
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assetPath = "/usr/share/mist"
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case "windows":
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assetPath = "./assets"
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default:
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assetPath = "."
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}
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}
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// Check if the assetPath exists. If not, try the source directory
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// This happens when binary is run from outside cmd/mist directory
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if _, err := os.Stat(assetPath); os.IsNotExist(err) {
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assetPath = path.Join(srcdir, "assets")
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}
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return assetPath
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}
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func DefaultDataDir() string {
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usr, _ := user.Current()
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if runtime.GOOS == "darwin" {
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return path.Join(usr.HomeDir, "Library/Ethereum")
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} else if runtime.GOOS == "windows" {
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return path.Join(usr.HomeDir, "AppData/Roaming/Ethereum")
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} else {
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return path.Join(usr.HomeDir, ".ethereum")
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}
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}
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func IsWindows() bool {
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return runtime.GOOS == "windows"
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}
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func WindonizePath(path string) string {
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if string(path[0]) == "/" && IsWindows() {
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path = path[1:]
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}
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return path
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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(Douglas) >= 0:
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fin = new(big.Int).Div(num, Douglas)
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denom = "Douglas"
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case num.Cmp(Einstein) >= 0:
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fin = new(big.Int).Div(num, Einstein)
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denom = "Einstein"
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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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// Common big integers often used
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var (
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Big1 = big.NewInt(1)
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Big2 = big.NewInt(2)
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Big3 = big.NewInt(3)
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Big0 = big.NewInt(0)
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BigTrue = Big1
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BigFalse = Big0
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Big32 = big.NewInt(32)
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Big256 = big.NewInt(0xff)
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Big257 = big.NewInt(257)
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)
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func Bench(pre string, cb func()) {
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start := time.Now()
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cb()
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fmt.Println(pre, ": took:", time.Since(start))
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}
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