/
float.go
94 lines (82 loc) · 1.91 KB
/
float.go
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package generator
const writeFloatMethod = `
func writeFloat(r float32, w io.Writer) error {
bits := uint64(math.Float32bits(r))
const byteCount = 4
return encodeFloat(w, byteCount, bits)
}
`
const encodeFloatMethod = `
func encodeFloat(w io.Writer, byteCount int, bits uint64) error {
var err error
var bb []byte
bw, ok := w.(ByteWriter)
if ok {
bw.Grow(byteCount)
} else {
bb = make([]byte, 0, byteCount)
}
for i := 0; i < byteCount; i++ {
if bw != nil {
err = bw.WriteByte(byte(bits & 255))
if err != nil {
return err
}
} else {
bb = append(bb, byte(bits&255))
}
bits = bits >> 8
}
if bw == nil {
_, err = w.Write(bb)
return err
}
return nil
}
`
const readFloatMethod = `
func readFloat(r io.Reader) (float32, error) {
buf := make([]byte, 4)
_, err := io.ReadFull(r, buf)
if err != nil {
return 0, err
}
bits := binary.LittleEndian.Uint32(buf)
val := math.Float32frombits(bits)
return val, nil
}
`
type floatField struct {
name string
defaultValue float32
hasDefault bool
}
func (s *floatField) Name() string {
return toPublicName(s.name)
}
func (s *floatField) FieldType() string {
return "Float"
}
func (s *floatField) GoType() string {
return "float32"
}
func (s *floatField) SerializerMethod() string {
return "writeFloat"
}
func (s *floatField) DeserializerMethod() string {
return "readFloat"
}
func (e *floatField) AddStruct(p *Package) {}
func (e *floatField) AddSerializer(p *Package) {
p.addStruct(UTIL_FILE, "ByteWriter", byteWriterInterface)
p.addFunction(UTIL_FILE, "", "writeFloat", writeFloatMethod)
p.addFunction(UTIL_FILE, "", "encodeFloat", encodeFloatMethod)
p.addImport(UTIL_FILE, "math")
p.addImport(UTIL_FILE, "io")
}
func (e *floatField) AddDeserializer(p *Package) {
p.addFunction(UTIL_FILE, "", "readFloat", readFloatMethod)
p.addImport(UTIL_FILE, "math")
p.addImport(UTIL_FILE, "encoding/binary")
p.addImport(UTIL_FILE, "io")
}