tape: Add float functions to the encoder

tape/decode.go

@@ -1,6 +1,7 @@
 package tape
 
 import "io"
+import "math"
 
 // Decodable is any type that can decode itself from a decoder.
 type Decodable interface {
@@ -125,3 +126,17 @@ func (this *Decoder) ReadGBEU() (value uint64, n int, err error) {
 		}
 	}
 }
+
+// ReadFloat32 decldes a 32-bit floating point value from the input reader.
+func (this *Decoder) ReadFloat32() (value float32, n int, err error) {
+	bits, nn, err := this.ReadUint32()
+	n += nn; if err != nil { return 0, n, err }
+	return math.Float32frombits(bits), n, nil
+}
+
+// ReadFloat64 decldes a 64-bit floating point value from the input reader.
+func (this *Decoder) ReadFloat64() (value float64, n int, err error) {
+	bits, nn, err := this.ReadUint64()
+	n += nn; if err != nil { return 0, n, err }
+	return math.Float64frombits(bits), n, nil
+}