实现导入Markdown

utils/filetil/filetil.go

@@ -6,6 +6,7 @@ import (
 	"strings"
 	"io"
 	"fmt"
+	"math"
 )
 
 //==================================
@@ -130,3 +131,71 @@ func RemoveDir(dir string) error {
 	return os.RemoveAll(dir)
 }
 
+func AbsolutePath(p string) (string, error) {
+
+	if strings.HasPrefix(p, "~") {
+		home := os.Getenv("HOME")
+		if home == "" {
+			panic(fmt.Sprintf("can not found HOME in envs, '%s' AbsPh Failed!", p))
+		}
+		p = fmt.Sprint(home, string(p[1:]))
+	}
+	s, err := filepath.Abs(p)
+
+	if nil != err {
+		return "", err
+	}
+	return s, nil
+}
+
+// FileExists reports whether the named file or directory exists.
+func FileExists(name string) bool {
+	if _, err := os.Stat(name); err != nil {
+		if os.IsNotExist(err) {
+			return false
+		}
+	}
+	return true
+}
+
+func FormatBytes(size int64) string {
+	units := []string{" B", " KB", " MB", " GB", " TB"}
+
+	s := float64(size)
+
+	i := 0
+
+	for ; s >= 1024 && i < 4; i++ {
+		s /= 1024
+	}
+
+	return fmt.Sprintf("%.2f%s", s, units[i])
+}
+
+func Round(val float64, places int) float64 {
+	var t float64
+	f := math.Pow10(places)
+	x := val * f
+	if math.IsInf(x, 0) || math.IsNaN(x) {
+		return val
+	}
+	if x >= 0.0 {
+		t = math.Ceil(x)
+		if (t - x) > 0.50000000001 {
+			t -= 1.0
+		}
+	} else {
+		t = math.Ceil(-x)
+		if (t + x) > 0.50000000001 {
+			t -= 1.0
+		}
+		t = -t
+	}
+	x = t / f
+
+	if !math.IsInf(x, 0) {
+		return x
+	}
+
+	return t
+}