mirror of https://github.com/mindoc-org/mindoc.git
109 lines
1.5 KiB
Go
109 lines
1.5 KiB
Go
package utils
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import (
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"strings"
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"os"
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"fmt"
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"path/filepath"
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"io"
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"math"
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)
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func AbsolutePath(p string) (string,error) {
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if strings.HasPrefix(p, "~") {
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home := os.Getenv("HOME")
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if home == "" {
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panic(fmt.Sprintf("can not found HOME in envs, '%s' AbsPh Failed!", p))
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}
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p = fmt.Sprint(home, string(p[1:]))
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}
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s, err := filepath.Abs(p)
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if nil != err {
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return "",err
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}
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return s,nil
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}
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// FileExists reports whether the named file or directory exists.
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func FileExists(name string) bool {
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if _, err := os.Stat(name); err != nil {
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if os.IsNotExist(err) {
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return false
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}
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}
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return true
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}
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func CopyFile(dstName, srcName string) (written int64, err error) {
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src, err := os.Open(srcName)
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if err != nil {
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return
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}
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defer src.Close()
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dst, err := os.OpenFile(dstName, os.O_WRONLY|os.O_CREATE, 0644)
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if err != nil {
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return
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}
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defer dst.Close()
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return io.Copy(dst, src)
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}
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func FormatBytes(size int64) string {
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units := []string{" B", " KB", " MB", " GB", " TB"}
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s := float64(size)
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i := 0
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for ; s >= 1024 && i < 4 ; i ++ {
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s /= 1024
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}
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return fmt.Sprintf("%.2f%s",s,units[i])
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}
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func Round(val float64, places int) float64 {
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var t float64
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f := math.Pow10(places)
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x := val * f
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if math.IsInf(x, 0) || math.IsNaN(x) {
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return val
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}
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if x >= 0.0 {
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t = math.Ceil(x)
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if (t - x) > 0.50000000001 {
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t -= 1.0
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}
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} else {
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t = math.Ceil(-x)
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if (t + x) > 0.50000000001 {
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t -= 1.0
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}
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t = -t
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}
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x = t / f
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if !math.IsInf(x, 0) {
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return x
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}
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return t
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}
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