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@@ -0,0 +1,94 @@
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+package main
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+
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+// Add a function similar to time.Duration.String() to
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+// pretty print an "uptime duration".
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+
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+import (
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+ "time"
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+)
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+
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+type DayDuration struct {
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+ time.Duration
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+}
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+
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+func fmtInt(buf []byte, v uint64) int {
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+ w := len(buf)
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+ if v == 0 {
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+ w--
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+ buf[w] = '0'
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+ } else {
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+ for v > 0 {
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+ w--
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+ buf[w] = byte(v%10) + '0'
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+ v /= 10
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+ }
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+ }
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+ return w
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+}
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+
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+// Copied from time/time.go
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+func (d DayDuration) DayString() string {
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+ var buf [32]byte
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+ w := len(buf)
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+
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+ u := uint64(d.Nanoseconds())
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+
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+ neg := d.Nanoseconds() < 0
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+ if neg {
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+ u = -u
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+ }
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+
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+ if u < uint64(time.Second) {
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+ // Don't show times less than a second
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+ w -= 2
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+ buf[w] = '0'
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+ buf[w+1] = 's'
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+ } else {
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+ w--
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+ buf[w] = 's'
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+
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+ // Skip fractional seconds
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+ u /= uint64(time.Second)
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+
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+ // u is now integer seconds
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+ w = fmtInt(buf[:w], u%60)
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+ u /= 60
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+
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+ // u is now integer minutes
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+ if u > 0 {
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+ w--
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+ buf[w] = ' '
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+ w--
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+ buf[w] = 'm'
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+ w = fmtInt(buf[:w], u%60)
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+ u /= 60
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+
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+ // u is now integer hours
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+ if u > 0 {
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+ w--
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+ buf[w] = ' '
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+ w--
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+ buf[w] = 'h'
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+ w = fmtInt(buf[:w], u%24)
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+ u /= 24
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+ }
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+
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+ // u is now integer days
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+ if u > 0 {
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+ w--
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+ buf[w] = ' '
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+ w--
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+ buf[w] = 'd'
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+ w = fmtInt(buf[:w], u)
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+ }
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+
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+ }
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+ }
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+
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+ if neg {
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+ w--
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+ buf[w] = '-'
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+ }
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+
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+ return string(buf[w:])
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+}
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Ask Bjørn Hansen