Function HumanBytes for human-readable representation of numbers. #18

utils/human.go

@@ -0,0 +1,22 @@
+package utils
+
+import (
+	"fmt"
+)
+
+// Convert bytes to human readable string
+func HumanBytes(i int64) (result string) {
+	switch {
+	case i > (512 * 1024 * 1024 * 1024):
+		result = fmt.Sprintf("%#.02f TiB", float64(i)/1024/1024/1024/1024)
+	case i > (512 * 1024 * 1024):
+		result = fmt.Sprintf("%#.02f GiB", float64(i)/1024/1024/1024)
+	case i > (512 * 1024):
+		result = fmt.Sprintf("%#.02f MiB", float64(i)/1024/1024)
+	case i > 512:
+		result = fmt.Sprintf("%#.02f KiB", float64(i)/1024)
+	default:
+		result = fmt.Sprintf("%d B", i)
+	}
+	return
+}

utils/human_test.go

@@ -0,0 +1,21 @@
+package utils
+
+import (
+	. "launchpad.net/gocheck"
+)
+
+type HumanSuite struct{}
+
+var _ = Suite(&HumanSuite{})
+
+func (s *HumanSuite) TestHumanBytes(c *C) {
+	c.Check(HumanBytes(50), Equals, "50 B")
+	c.Check(HumanBytes(968), Equals, "0.95 KiB")
+	c.Check(HumanBytes(20480), Equals, "20.00 KiB")
+	c.Check(HumanBytes(700480), Equals, "0.67 MiB")
+	c.Check(HumanBytes(7000480), Equals, "6.68 MiB")
+	c.Check(HumanBytes(824000480), Equals, "0.77 GiB")
+	c.Check(HumanBytes(82400000480), Equals, "76.74 GiB")
+	c.Check(HumanBytes(824000000480), Equals, "0.75 TiB")
+	c.Check(HumanBytes(824000000000480), Equals, "749.42 TiB")
+}