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Docker-DCO-1.1-Signed-off-by: Michael Crosby <[email protected]> (github: crosbymichael)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,2 @@ | ||
| Michael Crosby <[email protected]> (@crosbymichael) | ||
| Victor Vieux <[email protected]> (@vieux) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,31 @@ | ||
| package units | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "time" | ||
| ) | ||
|
|
||
| // HumanDuration returns a human-readable approximation of a duration | ||
| // (eg. "About a minute", "4 hours ago", etc.) | ||
| func HumanDuration(d time.Duration) string { | ||
| if seconds := int(d.Seconds()); seconds < 1 { | ||
| return "Less than a second" | ||
| } else if seconds < 60 { | ||
| return fmt.Sprintf("%d seconds", seconds) | ||
| } else if minutes := int(d.Minutes()); minutes == 1 { | ||
| return "About a minute" | ||
| } else if minutes < 60 { | ||
| return fmt.Sprintf("%d minutes", minutes) | ||
| } else if hours := int(d.Hours()); hours == 1 { | ||
| return "About an hour" | ||
| } else if hours < 48 { | ||
| return fmt.Sprintf("%d hours", hours) | ||
| } else if hours < 24*7*2 { | ||
| return fmt.Sprintf("%d days", hours/24) | ||
| } else if hours < 24*30*3 { | ||
| return fmt.Sprintf("%d weeks", hours/24/7) | ||
| } else if hours < 24*365*2 { | ||
| return fmt.Sprintf("%d months", hours/24/30) | ||
| } | ||
| return fmt.Sprintf("%f years", d.Hours()/24/365) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,56 @@ | ||
| package units | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "regexp" | ||
| "strconv" | ||
| "strings" | ||
| ) | ||
|
|
||
| // HumanSize returns a human-readable approximation of a size | ||
| // using SI standard (eg. "44kB", "17MB") | ||
| func HumanSize(size int64) string { | ||
| i := 0 | ||
| var sizef float64 | ||
| sizef = float64(size) | ||
| units := []string{"B", "kB", "MB", "GB", "TB", "PB", "EB", "ZB", "YB"} | ||
| for sizef >= 1000.0 { | ||
| sizef = sizef / 1000.0 | ||
| i++ | ||
| } | ||
| return fmt.Sprintf("%.4g %s", sizef, units[i]) | ||
| } | ||
|
|
||
| // Parses a human-readable string representing an amount of RAM | ||
| // in bytes, kibibytes, mebibytes or gibibytes, and returns the | ||
| // number of bytes, or -1 if the string is unparseable. | ||
| // Units are case-insensitive, and the 'b' suffix is optional. | ||
| func RAMInBytes(size string) (bytes int64, err error) { | ||
| re, error := regexp.Compile("^(\\d+)([kKmMgG])?[bB]?$") | ||
| if error != nil { | ||
| return -1, error | ||
| } | ||
|
|
||
| matches := re.FindStringSubmatch(size) | ||
|
|
||
| if len(matches) != 3 { | ||
| return -1, fmt.Errorf("Invalid size: '%s'", size) | ||
| } | ||
|
|
||
| memLimit, error := strconv.ParseInt(matches[1], 10, 0) | ||
| if error != nil { | ||
| return -1, error | ||
| } | ||
|
|
||
| unit := strings.ToLower(matches[2]) | ||
|
|
||
| if unit == "k" { | ||
| memLimit *= 1024 | ||
| } else if unit == "m" { | ||
| memLimit *= 1024 * 1024 | ||
| } else if unit == "g" { | ||
| memLimit *= 1024 * 1024 * 1024 | ||
| } | ||
|
|
||
| return memLimit, nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package units | ||
|
|
||
| import ( | ||
| "strings" | ||
| "testing" | ||
| ) | ||
|
|
||
| func TestHumanSize(t *testing.T) { | ||
|
|
||
| size := strings.Trim(HumanSize(1000), " \t") | ||
| expect := "1 kB" | ||
| if size != expect { | ||
| t.Errorf("1000 -> expected '%s', got '%s'", expect, size) | ||
| } | ||
|
|
||
| size = strings.Trim(HumanSize(1024), " \t") | ||
| expect = "1.024 kB" | ||
| if size != expect { | ||
| t.Errorf("1024 -> expected '%s', got '%s'", expect, size) | ||
| } | ||
| } | ||
|
|
||
| func TestRAMInBytes(t *testing.T) { | ||
| assertRAMInBytes(t, "32", false, 32) | ||
| assertRAMInBytes(t, "32b", false, 32) | ||
| assertRAMInBytes(t, "32B", false, 32) | ||
| assertRAMInBytes(t, "32k", false, 32*1024) | ||
| assertRAMInBytes(t, "32K", false, 32*1024) | ||
| assertRAMInBytes(t, "32kb", false, 32*1024) | ||
| assertRAMInBytes(t, "32Kb", false, 32*1024) | ||
| assertRAMInBytes(t, "32Mb", false, 32*1024*1024) | ||
| assertRAMInBytes(t, "32Gb", false, 32*1024*1024*1024) | ||
|
|
||
| assertRAMInBytes(t, "", true, -1) | ||
| assertRAMInBytes(t, "hello", true, -1) | ||
| assertRAMInBytes(t, "-32", true, -1) | ||
| assertRAMInBytes(t, " 32 ", true, -1) | ||
| assertRAMInBytes(t, "32 mb", true, -1) | ||
| assertRAMInBytes(t, "32m b", true, -1) | ||
| assertRAMInBytes(t, "32bm", true, -1) | ||
| } | ||
|
|
||
| func assertRAMInBytes(t *testing.T, size string, expectError bool, expectedBytes int64) { | ||
| actualBytes, err := RAMInBytes(size) | ||
| if (err != nil) && !expectError { | ||
| t.Errorf("Unexpected error parsing '%s': %s", size, err) | ||
| } | ||
| if (err == nil) && expectError { | ||
| t.Errorf("Expected to get an error parsing '%s', but got none (bytes=%d)", size, actualBytes) | ||
| } | ||
| if actualBytes != expectedBytes { | ||
| t.Errorf("Expected '%s' to parse as %d bytes, got %d", size, expectedBytes, actualBytes) | ||
| } | ||
| } |
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