blob: 3832feb5ceb297f01e6fda2e2b13224dcea0aedc [file] [log] [blame]
Takahiro Suzukid7bf8202020-12-17 20:21:59 +09001package log
2
3import "fmt"
4
5// InterleavedKVToFields converts keyValues a la Span.LogKV() to a Field slice
6// a la Span.LogFields().
7func InterleavedKVToFields(keyValues ...interface{}) ([]Field, error) {
8 if len(keyValues)%2 != 0 {
9 return nil, fmt.Errorf("non-even keyValues len: %d", len(keyValues))
10 }
11 fields := make([]Field, len(keyValues)/2)
12 for i := 0; i*2 < len(keyValues); i++ {
13 key, ok := keyValues[i*2].(string)
14 if !ok {
15 return nil, fmt.Errorf(
16 "non-string key (pair #%d): %T",
17 i, keyValues[i*2])
18 }
19 switch typedVal := keyValues[i*2+1].(type) {
20 case bool:
21 fields[i] = Bool(key, typedVal)
22 case string:
23 fields[i] = String(key, typedVal)
24 case int:
25 fields[i] = Int(key, typedVal)
26 case int8:
27 fields[i] = Int32(key, int32(typedVal))
28 case int16:
29 fields[i] = Int32(key, int32(typedVal))
30 case int32:
31 fields[i] = Int32(key, typedVal)
32 case int64:
33 fields[i] = Int64(key, typedVal)
34 case uint:
35 fields[i] = Uint64(key, uint64(typedVal))
36 case uint64:
37 fields[i] = Uint64(key, typedVal)
38 case uint8:
39 fields[i] = Uint32(key, uint32(typedVal))
40 case uint16:
41 fields[i] = Uint32(key, uint32(typedVal))
42 case uint32:
43 fields[i] = Uint32(key, typedVal)
44 case float32:
45 fields[i] = Float32(key, typedVal)
46 case float64:
47 fields[i] = Float64(key, typedVal)
48 default:
49 // When in doubt, coerce to a string
50 fields[i] = String(key, fmt.Sprint(typedVal))
51 }
52 }
53 return fields, nil
54}