Курнат Андрей
88 lines
1.9 KiB
Go
88 lines
1.9 KiB
Go
package mathutil
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import "fmt"
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// DataSize format bytes number friendly. eg: 1024 => 1KB, 1024*1024 => 1MB
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//
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// Usage:
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//
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// file, err := os.Open(path)
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// fl, err := file.Stat()
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// fmtSize := DataSize(fl.Size())
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func DataSize(size uint64) string {
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switch {
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case size < 1024:
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return fmt.Sprintf("%dB", size)
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case size < 1024*1024:
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return fmt.Sprintf("%.2fK", float64(size)/1024)
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case size < 1024*1024*1024:
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return fmt.Sprintf("%.2fM", float64(size)/1024/1024)
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default:
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return fmt.Sprintf("%.2fG", float64(size)/1024/1024/1024)
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}
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}
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// FormatBytes Format the byte size to be a readable string. eg: 1024 => 1 KB
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func FormatBytes(bytes int) string {
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const unit = 1024
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if bytes < unit {
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return fmt.Sprintf("%d B", bytes)
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}
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div, exp := int64(unit), 0
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for n := bytes / unit; n >= unit; n /= unit {
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div *= unit
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exp++
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}
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return fmt.Sprintf("%.2f %cB", float64(bytes)/float64(div), "KMGTPE"[exp])
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}
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var timeFormats = [][]int{
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{0},
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{1},
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{2, 1},
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{60},
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{120, 60},
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{3600},
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{7200, 3600},
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{86400},
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{172800, 86400}, // second elem is unit.
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{2592000},
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{2592000 * 2, 2592000},
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}
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var timeMessages = []string{
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"< 1 sec", "1 sec", "secs", "1 min", "mins", "1 hr", "hrs", "1 day", "days", "1 month", "months",
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}
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// HowLongAgo format a seconds, get how lang ago. eg: 1 day, 1 week
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func HowLongAgo(sec int64) string {
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intVal := int(sec)
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length := len(timeFormats)
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for i, item := range timeFormats {
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if intVal >= item[0] {
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ni := i + 1
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match := false
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if ni < length { // next exists
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next := timeFormats[ni]
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if intVal < next[0] { // current <= intVal < next
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match = true
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}
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} else if ni == length { // current is last
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match = true
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}
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if match { // match success
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if len(item) == 1 {
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return timeMessages[i]
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}
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return fmt.Sprintf("%d %s", intVal/item[1], timeMessages[i])
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}
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}
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}
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return "unknown" // He should never happen
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}
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