khenaidoo | ac63710 | 2019-01-14 15:44:34 -0500 | [diff] [blame^] | 1 | package cbor |
| 2 | |
| 3 | import ( |
| 4 | "time" |
| 5 | ) |
| 6 | |
| 7 | func appendIntegerTimestamp(dst []byte, t time.Time) []byte { |
| 8 | major := majorTypeTags |
| 9 | minor := additionalTypeTimestamp |
| 10 | dst = append(dst, byte(major|minor)) |
| 11 | secs := t.Unix() |
| 12 | var val uint64 |
| 13 | if secs < 0 { |
| 14 | major = majorTypeNegativeInt |
| 15 | val = uint64(-secs - 1) |
| 16 | } else { |
| 17 | major = majorTypeUnsignedInt |
| 18 | val = uint64(secs) |
| 19 | } |
| 20 | dst = appendCborTypePrefix(dst, major, uint64(val)) |
| 21 | return dst |
| 22 | } |
| 23 | |
| 24 | func (e Encoder) appendFloatTimestamp(dst []byte, t time.Time) []byte { |
| 25 | major := majorTypeTags |
| 26 | minor := additionalTypeTimestamp |
| 27 | dst = append(dst, byte(major|minor)) |
| 28 | secs := t.Unix() |
| 29 | nanos := t.Nanosecond() |
| 30 | var val float64 |
| 31 | val = float64(secs)*1.0 + float64(nanos)*1E-9 |
| 32 | return e.AppendFloat64(dst, val) |
| 33 | } |
| 34 | |
| 35 | // AppendTime encodes and adds a timestamp to the dst byte array. |
| 36 | func (e Encoder) AppendTime(dst []byte, t time.Time, unused string) []byte { |
| 37 | utc := t.UTC() |
| 38 | if utc.Nanosecond() == 0 { |
| 39 | return appendIntegerTimestamp(dst, utc) |
| 40 | } |
| 41 | return e.appendFloatTimestamp(dst, utc) |
| 42 | } |
| 43 | |
| 44 | // AppendTimes encodes and adds an array of timestamps to the dst byte array. |
| 45 | func (e Encoder) AppendTimes(dst []byte, vals []time.Time, unused string) []byte { |
| 46 | major := majorTypeArray |
| 47 | l := len(vals) |
| 48 | if l == 0 { |
| 49 | return e.AppendArrayEnd(e.AppendArrayStart(dst)) |
| 50 | } |
| 51 | if l <= additionalMax { |
| 52 | lb := byte(l) |
| 53 | dst = append(dst, byte(major|lb)) |
| 54 | } else { |
| 55 | dst = appendCborTypePrefix(dst, major, uint64(l)) |
| 56 | } |
| 57 | |
| 58 | for _, t := range vals { |
| 59 | dst = e.AppendTime(dst, t, unused) |
| 60 | } |
| 61 | return dst |
| 62 | } |
| 63 | |
| 64 | // AppendDuration encodes and adds a duration to the dst byte array. |
| 65 | // useInt field indicates whether to store the duration as seconds (integer) or |
| 66 | // as seconds+nanoseconds (float). |
| 67 | func (e Encoder) AppendDuration(dst []byte, d time.Duration, unit time.Duration, useInt bool) []byte { |
| 68 | if useInt { |
| 69 | return e.AppendInt64(dst, int64(d/unit)) |
| 70 | } |
| 71 | return e.AppendFloat64(dst, float64(d)/float64(unit)) |
| 72 | } |
| 73 | |
| 74 | // AppendDurations encodes and adds an array of durations to the dst byte array. |
| 75 | // useInt field indicates whether to store the duration as seconds (integer) or |
| 76 | // as seconds+nanoseconds (float). |
| 77 | func (e Encoder) AppendDurations(dst []byte, vals []time.Duration, unit time.Duration, useInt bool) []byte { |
| 78 | major := majorTypeArray |
| 79 | l := len(vals) |
| 80 | if l == 0 { |
| 81 | return e.AppendArrayEnd(e.AppendArrayStart(dst)) |
| 82 | } |
| 83 | if l <= additionalMax { |
| 84 | lb := byte(l) |
| 85 | dst = append(dst, byte(major|lb)) |
| 86 | } else { |
| 87 | dst = appendCborTypePrefix(dst, major, uint64(l)) |
| 88 | } |
| 89 | for _, d := range vals { |
| 90 | dst = e.AppendDuration(dst, d, unit, useInt) |
| 91 | } |
| 92 | return dst |
| 93 | } |