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94 lines
2.5 KiB
94 lines
2.5 KiB
6 years ago
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package cbor
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import (
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"time"
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)
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func appendIntegerTimestamp(dst []byte, t time.Time) []byte {
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major := majorTypeTags
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minor := additionalTypeTimestamp
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dst = append(dst, byte(major|minor))
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secs := t.Unix()
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var val uint64
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if secs < 0 {
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major = majorTypeNegativeInt
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val = uint64(-secs - 1)
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} else {
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major = majorTypeUnsignedInt
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val = uint64(secs)
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}
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dst = appendCborTypePrefix(dst, major, uint64(val))
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return dst
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}
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func (e Encoder) appendFloatTimestamp(dst []byte, t time.Time) []byte {
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major := majorTypeTags
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minor := additionalTypeTimestamp
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dst = append(dst, byte(major|minor))
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secs := t.Unix()
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nanos := t.Nanosecond()
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var val float64
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val = float64(secs)*1.0 + float64(nanos)*1E-9
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return e.AppendFloat64(dst, val)
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}
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// AppendTime encodes and adds a timestamp to the dst byte array.
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func (e Encoder) AppendTime(dst []byte, t time.Time, unused string) []byte {
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utc := t.UTC()
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if utc.Nanosecond() == 0 {
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return appendIntegerTimestamp(dst, utc)
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}
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return e.appendFloatTimestamp(dst, utc)
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}
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// AppendTimes encodes and adds an array of timestamps to the dst byte array.
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func (e Encoder) AppendTimes(dst []byte, vals []time.Time, unused string) []byte {
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major := majorTypeArray
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l := len(vals)
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if l == 0 {
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return e.AppendArrayEnd(e.AppendArrayStart(dst))
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}
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if l <= additionalMax {
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lb := byte(l)
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dst = append(dst, byte(major|lb))
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} else {
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dst = appendCborTypePrefix(dst, major, uint64(l))
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}
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for _, t := range vals {
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dst = e.AppendTime(dst, t, unused)
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}
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return dst
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}
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// AppendDuration encodes and adds a duration to the dst byte array.
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// useInt field indicates whether to store the duration as seconds (integer) or
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// as seconds+nanoseconds (float).
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func (e Encoder) AppendDuration(dst []byte, d time.Duration, unit time.Duration, useInt bool) []byte {
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if useInt {
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return e.AppendInt64(dst, int64(d/unit))
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}
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return e.AppendFloat64(dst, float64(d)/float64(unit))
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}
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// AppendDurations encodes and adds an array of durations to the dst byte array.
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// useInt field indicates whether to store the duration as seconds (integer) or
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// as seconds+nanoseconds (float).
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func (e Encoder) AppendDurations(dst []byte, vals []time.Duration, unit time.Duration, useInt bool) []byte {
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major := majorTypeArray
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l := len(vals)
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if l == 0 {
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return e.AppendArrayEnd(e.AppendArrayStart(dst))
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}
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if l <= additionalMax {
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lb := byte(l)
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dst = append(dst, byte(major|lb))
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} else {
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dst = appendCborTypePrefix(dst, major, uint64(l))
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}
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for _, d := range vals {
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dst = e.AppendDuration(dst, d, unit, useInt)
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}
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return dst
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}
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