switch to go vendoring

vendor/github.com/shamaton/msgpack/v2/internal/encoding/complex.go

@@ -0,0 +1,31 @@
+package encoding
+
+import (
+	"math"
+
+	"github.com/shamaton/msgpack/v2/def"
+)
+
+func (e *encoder) calcComplex64() int {
+	return def.Byte1 + def.Byte8
+}
+
+func (e *encoder) calcComplex128() int {
+	return def.Byte1 + def.Byte16
+}
+
+func (e *encoder) writeComplex64(v complex64, offset int) int {
+	offset = e.setByte1Int(def.Fixext8, offset)
+	offset = e.setByte1Int(int(def.ComplexTypeCode()), offset)
+	offset = e.setByte4Uint64(uint64(math.Float32bits(real(v))), offset)
+	offset = e.setByte4Uint64(uint64(math.Float32bits(imag(v))), offset)
+	return offset
+}
+
+func (e *encoder) writeComplex128(v complex128, offset int) int {
+	offset = e.setByte1Int(def.Fixext16, offset)
+	offset = e.setByte1Int(int(def.ComplexTypeCode()), offset)
+	offset = e.setByte8Uint64(math.Float64bits(real(v)), offset)
+	offset = e.setByte8Uint64(math.Float64bits(imag(v)), offset)
+	return offset
+}