1 files changed, 111 insertions, 0 deletions

diff --git a/vendor/github.com/json-iterator/go/stream_float.go b/vendor/github.com/json-iterator/go/stream_float.go
new file mode 100644
index 0000000..826aa59
--- /dev/null
+++ b/vendor/github.com/json-iterator/go/stream_float.go
@@ -0,0 +1,111 @@
+package jsoniter
+
+import (
+        "fmt"
+        "math"
+        "strconv"
+)
+
+var pow10 []uint64
+
+func init() {
+        pow10 = []uint64{1, 10, 100, 1000, 10000, 100000, 1000000}
+}
+
+// WriteFloat32 write float32 to stream
+func (stream *Stream) WriteFloat32(val float32) {
+        if math.IsInf(float64(val), 0) || math.IsNaN(float64(val)) {
+                stream.Error = fmt.Errorf("unsupported value: %f", val)
+                return
+        }
+        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.buf = strconv.AppendFloat(stream.buf, float64(val), fmt, -1, 32)
+}
+
+// WriteFloat32Lossy write float32 to stream with ONLY 6 digits precision although much much faster
+func (stream *Stream) WriteFloat32Lossy(val float32) {
+        if math.IsInf(float64(val), 0) || math.IsNaN(float64(val)) {
+                stream.Error = fmt.Errorf("unsupported value: %f", val)
+                return
+        }
+        if val < 0 {
+                stream.writeByte('-')
+                val = -val
+        }
+        if val > 0x4ffffff {
+                stream.WriteFloat32(val)
+                return
+        }
+        precision := 6
+        exp := uint64(1000000) // 6
+        lval := uint64(float64(val)*float64(exp) + 0.5)
+        stream.WriteUint64(lval / exp)
+        fval := lval % exp
+        if fval == 0 {
+                return
+        }
+        stream.writeByte('.')
+        for p := precision - 1; p > 0 && fval < pow10[p]; p-- {
+                stream.writeByte('0')
+        }
+        stream.WriteUint64(fval)
+        for stream.buf[len(stream.buf)-1] == '0' {
+                stream.buf = stream.buf[:len(stream.buf)-1]
+        }
+}
+
+// WriteFloat64 write float64 to stream
+func (stream *Stream) WriteFloat64(val float64) {
+        if math.IsInf(val, 0) || math.IsNaN(val) {
+                stream.Error = fmt.Errorf("unsupported value: %f", val)
+                return
+        }
+        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.buf = strconv.AppendFloat(stream.buf, float64(val), fmt, -1, 64)
+}
+
+// WriteFloat64Lossy write float64 to stream with ONLY 6 digits precision although much much faster
+func (stream *Stream) WriteFloat64Lossy(val float64) {
+        if math.IsInf(val, 0) || math.IsNaN(val) {
+                stream.Error = fmt.Errorf("unsupported value: %f", val)
+                return
+        }
+        if val < 0 {
+                stream.writeByte('-')
+                val = -val
+        }
+        if val > 0x4ffffff {
+                stream.WriteFloat64(val)
+                return
+        }
+        precision := 6
+        exp := uint64(1000000) // 6
+        lval := uint64(val*float64(exp) + 0.5)
+        stream.WriteUint64(lval / exp)
+        fval := lval % exp
+        if fval == 0 {
+                return
+        }
+        stream.writeByte('.')
+        for p := precision - 1; p > 0 && fval < pow10[p]; p-- {
+                stream.writeByte('0')
+        }
+        stream.WriteUint64(fval)
+        for stream.buf[len(stream.buf)-1] == '0' {
+                stream.buf = stream.buf[:len(stream.buf)-1]
+        }
+}