zlog/field.go

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package zerolog
import (
"bytes"
"strconv"
"time"
)
var now = time.Now
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type fieldMode uint8
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const (
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zeroFieldMode fieldMode = iota
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rawFieldMode
quotedFieldMode
precomputedFieldMode
timestampFieldMode
)
// field define a logger field.
type field struct {
key string
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mode fieldMode
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val string
json []byte
}
func (f field) writeJSON(buf *bytes.Buffer) {
switch f.mode {
case zeroFieldMode:
return
case precomputedFieldMode:
buf.Write(f.json)
return
case timestampFieldMode:
writeJSONString(buf, TimestampFieldName)
buf.WriteByte(':')
buf.WriteString(strconv.FormatInt(now().Unix(), 10))
return
}
writeJSONString(buf, f.key)
buf.WriteByte(':')
switch f.mode {
case quotedFieldMode:
writeJSONString(buf, f.val)
case rawFieldMode:
buf.WriteString(f.val)
default:
panic("unknown field mode")
}
}
func (f field) compileJSON() field {
switch f.mode {
case zeroFieldMode, precomputedFieldMode, timestampFieldMode:
return f
}
buf := &bytes.Buffer{}
f.writeJSON(buf)
cf := field{
mode: precomputedFieldMode,
json: buf.Bytes(),
}
return cf
}
func fStr(key, val string) field {
return field{key, quotedFieldMode, val, nil}
}
func fErr(err error) field {
return field{ErrorFieldName, quotedFieldMode, err.Error(), nil}
}
func fBool(key string, b bool) field {
if b {
return field{key, rawFieldMode, "true", nil}
}
return field{key, rawFieldMode, "false", nil}
}
func fInt(key string, i int) field {
return field{key, rawFieldMode, strconv.FormatInt(int64(i), 10), nil}
}
func fInt8(key string, i int8) field {
return field{key, rawFieldMode, strconv.FormatInt(int64(i), 10), nil}
}
func fInt16(key string, i int16) field {
return field{key, rawFieldMode, strconv.FormatInt(int64(i), 10), nil}
}
func fInt32(key string, i int32) field {
return field{key, rawFieldMode, strconv.FormatInt(int64(i), 10), nil}
}
func fInt64(key string, i int64) field {
return field{key, rawFieldMode, strconv.FormatInt(i, 10), nil}
}
func fUint(key string, i uint) field {
return field{key, rawFieldMode, strconv.FormatUint(uint64(i), 10), nil}
}
func fUint8(key string, i uint8) field {
return field{key, rawFieldMode, strconv.FormatUint(uint64(i), 10), nil}
}
func fUint16(key string, i uint16) field {
return field{key, rawFieldMode, strconv.FormatUint(uint64(i), 10), nil}
}
func fUint32(key string, i uint32) field {
return field{key, rawFieldMode, strconv.FormatUint(uint64(i), 10), nil}
}
func fUint64(key string, i uint64) field {
return field{key, rawFieldMode, strconv.FormatUint(i, 10), nil}
}
func fFloat32(key string, f float32) field {
return field{key, rawFieldMode, strconv.FormatFloat(float64(f), 'f', -1, 32), nil}
}
func fFloat64(key string, f float64) field {
return field{key, rawFieldMode, strconv.FormatFloat(f, 'f', -1, 64), nil}
}
func fTimestamp() field {
return field{mode: timestampFieldMode}
}
func fTime(key string, t time.Time) field {
return field{key, quotedFieldMode, t.Format(TimeFieldFormat), nil}
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}
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func fRaw(key string, raw string) field {
return field{key, rawFieldMode, raw, nil}
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}