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fix write float compatibility

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This commit is contained in:
Tao Wen
2017-07-02 15:11:36 +08:00
parent c4f54740f7
commit c009421781
3 changed files with 28 additions and 6 deletions
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25
feature_stream_float.go
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@ -2,6 +2,7 @@ package jsoniter
import (
"strconv"
"math"
)
var _POW10 []uint64
@ -11,7 +12,15 @@ func init() {
}
func (stream *Stream) WriteFloat32(val float32) {
stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 32))
abs := math.Abs(float64(val))
fmt := byte('f')
// Note: Must use float32 comparisons for underlying float32 value to get precise cutoffs right.
if abs != 0 {
if float32(abs) < 1e-6 || float32(abs) >= 1e21 {
fmt = 'e'
}
}
stream.WriteRaw(strconv.FormatFloat(float64(val), fmt, -1, 32))
}
func (stream *Stream) WriteFloat32Lossy(val float32) {
@ -20,7 +29,7 @@ func (stream *Stream) WriteFloat32Lossy(val float32) {
val = -val
}
if val > 0x4ffffff {
stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 32))
stream.WriteFloat32(val)
return
}
precision := 6
@ -43,7 +52,15 @@ func (stream *Stream) WriteFloat32Lossy(val float32) {
}
func (stream *Stream) WriteFloat64(val float64) {
stream.WriteRaw(strconv.FormatFloat(float64(val), 'f', -1, 64))
abs := math.Abs(val)
fmt := byte('f')
// Note: Must use float32 comparisons for underlying float32 value to get precise cutoffs right.
if abs != 0 {
if abs < 1e-6 || abs >= 1e21 {
fmt = 'e'
}
}
stream.WriteRaw(strconv.FormatFloat(float64(val), fmt, -1, 64))
}
func (stream *Stream) WriteFloat64Lossy(val float64) {
@ -52,7 +69,7 @@ func (stream *Stream) WriteFloat64Lossy(val float64) {
val = -val
}
if val > 0x4ffffff {
stream.WriteRaw(strconv.FormatFloat(val, 'f', -1, 64))
stream.WriteFloat64(val)
return
}
precision := 6