func TestFloat32_Random(t *testing.T) {
if testing.Short() {
t.Skip("skipping in short mode")
}
i := 0
for i < randomChecks {
a1 := math.Float32frombits(randomUint32())
a2 := math.Float32frombits(randomUint32())
if math.IsNaN(float64(a1)) || math.IsNaN(float64(a2)) {
continue
}
i++
r1 := make([]byte, 4)
PutFloat32(r1, a1)
v1 := Float32(r1)
assert.Equal(t, a1, v1)
r2 := make([]byte, 4)
PutFloat32(r2, a2)
switch {
case a1 < a2:
assert.Equal(t, -1, bytes.Compare(r1, r2), "%v %v", a1, a2)
case a1 == a2:
assert.Equal(t, 0, bytes.Compare(r1, r2), "%v %v", a1, a2)
case a1 > a2:
assert.Equal(t, +1, bytes.Compare(r1, r2), "%v %v", a1, a2)
}
}
}
func (u *UseEntity) read(rr io.Reader) (err error) {
var tmp [4]byte
if u.TargetID, err = ReadVarInt(rr); err != nil {
return
}
if u.Type, err = ReadVarInt(rr); err != nil {
return
}
if u.Type == 2 {
var tmp0 uint32
if _, err = rr.Read(tmp[:4]); err != nil {
return
}
tmp0 = (uint32(tmp[3]) << 0) | (uint32(tmp[2]) << 8) | (uint32(tmp[1]) << 16) | (uint32(tmp[0]) << 24)
u.TargetX = math.Float32frombits(tmp0)
var tmp1 uint32
if _, err = rr.Read(tmp[:4]); err != nil {
return
}
tmp1 = (uint32(tmp[3]) << 0) | (uint32(tmp[2]) << 8) | (uint32(tmp[1]) << 16) | (uint32(tmp[0]) << 24)
u.TargetY = math.Float32frombits(tmp1)
var tmp2 uint32
if _, err = rr.Read(tmp[:4]); err != nil {
return
}
tmp2 = (uint32(tmp[3]) << 0) | (uint32(tmp[2]) << 8) | (uint32(tmp[1]) << 16) | (uint32(tmp[0]) << 24)
u.TargetZ = math.Float32frombits(tmp2)
}
if u.Type == 0 || u.Type == 2 {
if u.Hand, err = ReadVarInt(rr); err != nil {
return
}
}
return
}
func (smp complexLEF32Sampler) Transform(buf []byte, data accel.DSPSplitComplex) {
for i := 0; i < len(data.Real); i++ {
j := i * 8
data.Real[i] = math.Float32frombits(binary.LittleEndian.Uint32(buf[j : j+4]))
data.Imag[i] = math.Float32frombits(binary.LittleEndian.Uint32(buf[j+4 : j+8]))
}
}
func (d *decoder) value(v reflect.Value) {
switch v.Kind() {
case reflect.Array:
l := v.Len()
for i := 0; i < l; i++ {
d.value(v.Index(i))
}
case reflect.Struct:
l := v.NumField()
for i := 0; i < l; i++ {
d.value(v.Field(i))
}
case reflect.Slice:
l := v.Len()
for i := 0; i < l; i++ {
d.value(v.Index(i))
}
case reflect.Int8:
v.SetInt(int64(d.int8()))
case reflect.Int16:
v.SetInt(int64(d.int16()))
case reflect.Int32:
v.SetInt(int64(d.int32()))
case reflect.Int64:
v.SetInt(d.int64())
case reflect.Uint8:
v.SetUint(uint64(d.uint8()))
case reflect.Uint16:
v.SetUint(uint64(d.uint16()))
case reflect.Uint32:
v.SetUint(uint64(d.uint32()))
case reflect.Uint64:
v.SetUint(d.uint64())
case reflect.Float32:
v.SetFloat(float64(math.Float32frombits(d.uint32())))
case reflect.Float64:
v.SetFloat(math.Float64frombits(d.uint64()))
case reflect.Complex64:
v.SetComplex(complex(
float64(math.Float32frombits(d.uint32())),
float64(math.Float32frombits(d.uint32())),
))
case reflect.Complex128:
v.SetComplex(complex(
math.Float64frombits(d.uint64()),
math.Float64frombits(d.uint64()),
))
}
}
func complex64Decoder(dec *decoder, v reflect.Value) error {
bs := dec.buf[:8]
if err := readAtLeast(dec, bs, 8); err != nil {
return err
}
v.SetComplex(complex(
float64(math.Float32frombits(dec.order.Uint32(bs))),
float64(math.Float32frombits(dec.order.Uint32(bs[4:]))),
))
return nil
}
func complex64Decoder(dec *decoder, p unsafe.Pointer) error {
bs := dec.buf[:8]
if err := readAtLeast(dec, bs, 8); err != nil {
return err
}
v := (*complex64)(p)
*v = complex(
math.Float32frombits(dec.order.Uint32(bs)),
math.Float32frombits(dec.order.Uint32(bs[4:])),
)
return nil
}
func handleConnection(conn net.Conn) {
player := &Player{Conn: conn}
defer func() {
log.Printf("Player %q left (%s)\n", player.Nick, conn.RemoteAddr())
mu.Lock()
game.Leave(player)
mu.Unlock()
}()
var nickLength uint32
binary.Read(conn, binary.BigEndian, &nickLength)
nickBytes := make([]byte, nickLength)
if _, err := io.ReadFull(conn, nickBytes); err != nil {
log.Println(err)
return
}
player.Nick = string(nickBytes)
mu.Lock()
game.Join(player, 200, 200)
mu.Unlock()
log.Printf("Player %q joined (%s)\n", player.Nick, conn.RemoteAddr())
buf := make([]byte, 12)
for {
if _, err := io.ReadFull(conn, buf); err != nil {
if err != io.EOF {
log.Println(err)
}
return
}
mu.Lock()
player.JoystickX = math.Float32frombits(binary.BigEndian.Uint32(buf))
player.JoystickY = math.Float32frombits(binary.BigEndian.Uint32(buf[4:]))
buttons := binary.BigEndian.Uint32(buf[8:])
player.ButtonA = buttons&1 != 0
player.ButtonB = buttons&2 != 0
if player.JoystickX < -1 {
player.JoystickX = -1
} else if player.JoystickX > 1 {
player.JoystickX = 1
}
if player.JoystickY < -1 {
player.JoystickY = 1
} else if player.JoystickY > 1 {
player.JoystickY = 1
}
mu.Unlock()
}
}
func (p *Parser) ReadFloat32(value *float32) *Parser {
bufFloat32 := make([]byte, 4)
if bufFloat32 = p.buffer.Next(4); len(bufFloat32) < 4 {
p.err = errors.New("Not enough bytes in buffer")
return p
}
if p.Endian() == BigEndian {
(*value) = math.Float32frombits(binary.BigEndian.Uint32(bufFloat32))
} else {
(*value) = math.Float32frombits(binary.LittleEndian.Uint32(bufFloat32))
}
return p
}
func (d *simpleDecDriver) decodeFloat(chkOverflow32 bool) (f float64) {
switch d.bd {
case simpleVdFloat32:
f = float64(math.Float32frombits(d.r.readUint32()))
case simpleVdFloat64:
f = math.Float64frombits(d.r.readUint64())
default:
if d.bd >= simpleVdPosInt1 && d.bd <= simpleVdNegInt8 {
_, i, _ := d.decIntAny()
f = float64(i)
} else {
decErr("Float only valid from float32/64: Invalid descriptor: %v", d.bd)
}
}
// check overflow (logic adapted from std pkg reflect/value.go OverflowFloat()
if chkOverflow32 {
f2 := f
if f2 < 0 {
f2 = -f
}
if math.MaxFloat32 < f2 && f2 <= math.MaxFloat64 {
decErr("Overflow float32 value: %v", f2)
}
}
return
}
func ReadFloat32(buf []byte, format byte, endianness binary.ByteOrder) float32 {
encoding := format & EncodingMask
if encoding == EncodingFloatingPoint {
return math.Float32frombits(endianness.Uint32(buf))
} else {
offset := 0
if endianness == binary.LittleEndian {
offset = len(buf) - 1
}
var neg byte = 0
if encoding == EncodingSignedInt && buf[offset]&(1<<7) != 0 {
neg = 0xFF
}
tmp := []byte{neg, neg, neg, neg}
if endianness == binary.BigEndian {
copy(tmp[4-len(buf):], buf)
} else {
copy(tmp, buf)
}
sample := endianness.Uint32(tmp)
div := math.Pow(2, float64(len(buf)*8-1))
if encoding == EncodingSignedInt {
return float32(float64(int32(sample)) / div)
} else {
return float32(float64(sample)/div - 1.0)
}
}
}
func TestFloat32(t *testing.T) {
var buf = make([]byte, 4)
var expected = float32(2 << 15)
// Put
bytes, err := LittleEndian.PutFloat32(buf, 0, expected)
assert.Nil(t, err)
assert.Equal(t, expected, math.Float32frombits(binary.LittleEndian.Uint32(buf)))
assert.Equal(t, uint64(4), bytes)
// Put error (index = -1)
bytes, err = LittleEndian.PutFloat32(buf, -1, expected)
assert.NotNil(t, err)
assert.Equal(t, uint64(0), bytes)
// Put error (index = 2)
bytes, err = LittleEndian.PutFloat32(buf, 2, expected)
assert.NotNil(t, err)
assert.Equal(t, uint64(0), bytes)
// Get
val, err := LittleEndian.Float32(buf, 0)
assert.Nil(t, err)
assert.Equal(t, expected, val)
// Get Error (index = -1)
val, err = LittleEndian.Float32(buf, -1)
assert.NotNil(t, err)
assert.Equal(t, float32(0), val)
// Get Error (index = 2)
val, err = LittleEndian.Float32(buf, 2)
assert.NotNil(t, err)
assert.Equal(t, float32(0), val)
}
// TestRoundTrip32 tries a fraction of all finite positive float32 values.
func TestRoundTrip32(t *testing.T) {
step := uint32(997)
if testing.Short() {
step = 99991
}
count := 0
for i := uint32(0); i < 0xff<<23; i += step {
f := math.Float32frombits(i)
if i&1 == 1 {
f = -f // negative
}
s := FormatFloat(float64(f), 'g', -1, 32)
parsed, err := ParseFloat(s, 32)
parsed32 := float32(parsed)
switch {
case err != nil:
t.Errorf("ParseFloat(%q, 32) gave error %s", s, err)
case float64(parsed32) != parsed:
t.Errorf("ParseFloat(%q, 32) = %v, not a float32 (nearest is %v)", s, parsed, parsed32)
case parsed32 != f:
t.Errorf("ParseFloat(%q, 32) = %b (expected %b)", s, parsed32, f)
}
count++
}
t.Logf("tested %d float32's", count)
}
func decodeFloat4(vr *ValueReader) float32 {
if vr.Len() == -1 {
vr.Fatal(ProtocolError("Cannot decode null into float32"))
return 0
}
if vr.Type().DataType != Float4Oid {
vr.Fatal(ProtocolError(fmt.Sprintf("Cannot decode oid %v into float32", vr.Type().DataType)))
return 0
}
switch vr.Type().FormatCode {
case TextFormatCode:
s := vr.ReadString(vr.Len())
n, err := strconv.ParseFloat(s, 32)
if err != nil {
vr.Fatal(ProtocolError(fmt.Sprintf("Received invalid float4: %v", s)))
return 0
}
return float32(n)
case BinaryFormatCode:
if vr.Len() != 4 {
vr.Fatal(ProtocolError(fmt.Sprintf("Received an invalid size for an float4: %d", vr.Len())))
return 0
}
i := vr.ReadInt32()
return math.Float32frombits(uint32(i))
default:
vr.Fatal(ProtocolError(fmt.Sprintf("Unknown field description format code: %v", vr.Type().FormatCode)))
return 0
}
}
// Float32 converts the 8-bit floating-point value to a float32. The 8-bit and
// the 32-bit floating-point notation formats are described at Float8 and New
// respectively.
func (f Float8) Float32() float32 {
if f == 0 {
// Return the floating-point value 0.
return 0
}
// bits is the bit representation of the float32 value.
var bits uint32
// Sign bit.
if f.Sign() {
bits |= 0x80000000
}
// Exponent.
exp := f.Exp()
exp-- // adjust exponent for the implicit 1.
// Encode exponent.
xexp := uint8(exp)
xexp += 127 // excess 127 notation.
bits |= uint32(xexp) << 23
// Mantissa.
mantissa := f.Mantissa()
// remove the implicit 1 from the mantissa.
mantissa &^= 0x8
// Encode the mantissa.
bits |= uint32(mantissa) << 20
return math.Float32frombits(bits)
}
// read/write float32.
func (ps *PacketSerializer) readFloat32(reader io.Reader) (v float32, err error) {
var vUint32 uint32
if vUint32, err = ps.readUint32(reader); err != nil {
return
}
return math.Float32frombits(vUint32), nil
}
func decode(b []byte, t uint16) driver.Value {
switch t {
case typeBool:
if len(b) >= 1 && b[0] != 0 {
return true
}
return false
case typeBlob:
return b
case typeVarchar, typeText, typeAscii:
return b
case typeInt:
return int64(int32(binary.BigEndian.Uint32(b)))
case typeBigInt:
return int64(binary.BigEndian.Uint64(b))
case typeFloat:
return float64(math.Float32frombits(binary.BigEndian.Uint32(b)))
case typeDouble:
return math.Float64frombits(binary.BigEndian.Uint64(b))
case typeTimestamp:
t := int64(binary.BigEndian.Uint64(b))
sec := t / 1000
nsec := (t - sec*1000) * 1000000
return time.Unix(sec, nsec)
case typeUUID, typeTimeUUID:
return uuid.FromBytes(b)
default:
panic("unsupported type")
}
return b
}
func (s *Sprite) SetTint(tint uint32) {
r := uint32((tint >> 16) & 0xFF)
g := uint32((tint >> 8) & 0xFF)
b := uint32(tint & 0xFF)
a := uint32(s.Alpha * 255.0)
s.color = math.Float32frombits((a<<24 | b<<16 | g<<8 | r) & 0xfeffffff)
}
func (rs *ResultSet) float32(ord int) (value float32, isNull bool) {
if rs.conn.LogLevel >= LogVerbose {
defer rs.conn.logExit(rs.conn.logEnter("*ResultSet.float32"))
}
isNull = rs.isNull(ord)
if isNull {
return
}
val := rs.values[ord]
switch rs.fields[ord].format {
case textFormat:
// strconv.Atof32 does not handle NaN
if string(val) == "NaN" {
value = float32(math.NaN())
} else {
var err os.Error
value, err = strconv.Atof32(string(val))
panicIfErr(err)
}
case binaryFormat:
value = math.Float32frombits(binary.BigEndian.Uint32(val))
}
return
}
// Decode will take the binary data and decode into
// into the ensemble data set.
func (vel *EarthVelocityDataSet) Decode(data []byte) {
// Initialize the 2D array
// [Bins][Beams]
vel.Velocity = make([][]float32, vel.Base.NumElements)
for i := range vel.Velocity {
vel.Velocity[i] = make([]float32, vel.Base.ElementMultiplier)
}
vel.Vectors = make([]VelocityVector, vel.Base.NumElements)
// Not enough data
if uint32(len(data)) < vel.Base.NumElements*vel.Base.ElementMultiplier*uint32(BytesInFloat) {
return
}
// Set each beam and bin data
ptr := 0
for beam := 0; beam < int(vel.Base.ElementMultiplier); beam++ {
for bin := 0; bin < int(vel.Base.NumElements); bin++ {
// Get the location of the data
ptr = GetBinBeamIndex(int(vel.Base.NameLen), int(vel.Base.NumElements), beam, bin)
// Set the data to float
bits := binary.LittleEndian.Uint32(data[ptr : ptr+BytesInFloat])
vel.Velocity[bin][beam] = math.Float32frombits(bits)
// Calculate the velocity vector
vel.Vectors[bin] = calcVV(vel.Velocity[bin])
}
}
}
// Value returns the field's value as interface{}.
func (lf Field) Value() interface{} {
switch lf.fieldType {
case stringType:
return lf.stringVal
case boolType:
return lf.numericVal != 0
case intType:
return int(lf.numericVal)
case int32Type:
return int32(lf.numericVal)
case int64Type:
return int64(lf.numericVal)
case uint32Type:
return uint32(lf.numericVal)
case uint64Type:
return uint64(lf.numericVal)
case float32Type:
return math.Float32frombits(uint32(lf.numericVal))
case float64Type:
return math.Float64frombits(uint64(lf.numericVal))
case errorType, objectType, lazyLoggerType:
return lf.interfaceVal
default:
return nil
}
}
// Marshal passes a Field instance through to the appropriate
// field-type-specific method of an Encoder.
func (lf Field) Marshal(visitor Encoder) {
switch lf.fieldType {
case stringType:
visitor.EmitString(lf.key, lf.stringVal)
case boolType:
visitor.EmitBool(lf.key, lf.numericVal != 0)
case intType:
visitor.EmitInt(lf.key, int(lf.numericVal))
case int32Type:
visitor.EmitInt32(lf.key, int32(lf.numericVal))
case int64Type:
visitor.EmitInt64(lf.key, int64(lf.numericVal))
case uint32Type:
visitor.EmitUint32(lf.key, uint32(lf.numericVal))
case uint64Type:
visitor.EmitUint64(lf.key, uint64(lf.numericVal))
case float32Type:
visitor.EmitFloat32(lf.key, math.Float32frombits(uint32(lf.numericVal)))
case float64Type:
visitor.EmitFloat64(lf.key, math.Float64frombits(uint64(lf.numericVal)))
case errorType:
visitor.EmitString(lf.key, lf.interfaceVal.(error).Error())
case objectType:
visitor.EmitObject(lf.key, lf.interfaceVal)
case lazyLoggerType:
visitor.EmitLazyLogger(lf.interfaceVal.(LazyLogger))
}
}
func readFixedType(ti *typeInfo, r *tdsBuffer) (res interface{}) {
r.ReadFull(ti.Buffer)
buf := ti.Buffer
switch ti.TypeId {
case typeNull:
return nil
case typeInt1:
return int64(buf[0])
case typeBit:
return buf[0] != 0
case typeInt2:
return int64(int16(binary.LittleEndian.Uint16(buf)))
case typeInt4:
return int64(int32(binary.LittleEndian.Uint32(buf)))
case typeDateTim4:
return decodeDateTim4(buf)
case typeFlt4:
return math.Float32frombits(binary.LittleEndian.Uint32(buf))
case typeMoney4:
return decodeMoney4(buf)
case typeMoney:
return decodeMoney(buf)
case typeDateTime:
return decodeDateTime(buf)
case typeFlt8:
return math.Float64frombits(binary.LittleEndian.Uint64(buf))
case typeInt8:
return int64(binary.LittleEndian.Uint64(buf))
default:
badStreamPanicf("Invalid typeid")
}
panic("shoulnd't get here")
}
// read will read a single entry from the BOW database.
//
// It would be much nicer to use the binary package here (like we do for
// reading), but we need to be as fast here as possible. (It looks like
// there is a fair bit of allocation going on in the binary package.)
// Benchmarks are gone in the wind...
func (db *DB) read() (*bow.Bowed, error) {
// Read in the id string.
if err := db.readItem(); err != nil {
return nil, err
}
id := string(db.entryBuf)
// Read in the arbitrary data.
if err := db.readItem(); err != nil {
return nil, err
}
data := db.newData(len(db.entryBuf))
copy(data, db.entryBuf)
// Now read in the BOW.
if err := db.readItem(); err != nil {
return nil, err
}
freqs := db.newBow()
// Advance 6 bytes at a time. 2 bytes for the fragment index and
// 4 bytes for the fragment frequency.
for i := 0; i < len(db.entryBuf); i += 6 {
fragi := binary.BigEndian.Uint16(db.entryBuf[i : i+2])
freqs[fragi] = math.Float32frombits(
binary.BigEndian.Uint32(db.entryBuf[i+2 : i+6]))
}
return &bow.Bowed{Id: id, Data: data, Bow: bow.Bow{freqs}}, nil
}
func (p *binReader) readFloat32() (x float32, err error) {
code, err := p.decodeFixed32()
if err != nil {
return
}
return math.Float32frombits(code), nil
}
// sampleValueAtIndex implements chunkIterator.
func (it *deltaEncodedChunkIterator) sampleValueAtIndex(idx int) clientmodel.SampleValue {
offset := deltaHeaderBytes + idx*int(it.tBytes+it.vBytes) + int(it.tBytes)
if it.isInt {
switch it.vBytes {
case d0:
return it.baseV
case d1:
return it.baseV + clientmodel.SampleValue(int8(it.c[offset]))
case d2:
return it.baseV + clientmodel.SampleValue(int16(binary.LittleEndian.Uint16(it.c[offset:])))
case d4:
return it.baseV + clientmodel.SampleValue(int32(binary.LittleEndian.Uint32(it.c[offset:])))
// No d8 for ints.
default:
panic("Invalid number of bytes for integer delta")
}
} else {
switch it.vBytes {
case d4:
return it.baseV + clientmodel.SampleValue(math.Float32frombits(binary.LittleEndian.Uint32(it.c[offset:])))
case d8:
// Take absolute value for d8.
return clientmodel.SampleValue(math.Float64frombits(binary.LittleEndian.Uint64(it.c[offset:])))
default:
panic("Invalid number of bytes for floating point delta")
}
}
}
func (dec *Decoder) parseHeader() (version string, tempo float32) {
if dec.err != nil {
return
}
buffer := make([]byte, 50)
n, err := dec.r.Read(buffer)
if err != nil {
dec.err = err
return
}
if n < 50 {
dec.err = ErrSmallBinary
return
}
// Validate the binary header
for i := 0; i < len(SPLICE); i++ {
if SPLICE[i] != buffer[i] {
dec.err = ErrInValidHeader
return
}
}
dec.len = int(binary.BigEndian.Uint32(buffer[10:14]))
version = string(bytes.Trim(buffer[14:46], "\x00"))
tempo = math.Float32frombits(binary.LittleEndian.Uint32(buffer[46:50]))
dec.len = dec.len - 36
return
}
// Set sets p to point at a newly allocated word with bits set to x.
func word32_Set(p word32, o *Buffer, x uint32) {
t := p.v.Type().Elem()
switch t {
case int32Type:
if len(o.int32s) == 0 {
o.int32s = make([]int32, uint32PoolSize)
}
o.int32s[0] = int32(x)
p.v.Set(reflect.ValueOf(&o.int32s[0]))
o.int32s = o.int32s[1:]
return
case uint32Type:
if len(o.uint32s) == 0 {
o.uint32s = make([]uint32, uint32PoolSize)
}
o.uint32s[0] = x
p.v.Set(reflect.ValueOf(&o.uint32s[0]))
o.uint32s = o.uint32s[1:]
return
case float32Type:
if len(o.float32s) == 0 {
o.float32s = make([]float32, uint32PoolSize)
}
o.float32s[0] = math.Float32frombits(x)
p.v.Set(reflect.ValueOf(&o.float32s[0]))
o.float32s = o.float32s[1:]
return
}
// must be enum
p.v.Set(reflect.New(t))
p.v.Elem().SetInt(int64(int32(x)))
}
func (rs *ResultSet) float32(ord int) (value float32, isNull bool) {
if rs.conn.LogLevel >= LogVerbose {
defer rs.conn.logExit(rs.conn.logEnter("*ResultSet.float32"))
}
isNull = rs.isNull(ord)
if isNull {
return
}
val := rs.values[ord]
switch rs.fields[ord].format {
case textFormat:
// strconv.Atof32 does not handle "-Infinity" and "Infinity"
valStr := string(val)
switch valStr {
case "-Infinity":
value = float32(math.Inf(-1))
case "Infinity":
value = float32(math.Inf(1))
default:
var err os.Error
value, err = strconv.Atof32(valStr)
panicIfErr(err)
}
case binaryFormat:
value = math.Float32frombits(binary.BigEndian.Uint32(val))
}
return
}
// Decode will take the binary data and decode into
// into the ensemble data set.
func (amp *AmplitudeDataSet) Decode(data []byte) {
// Initialize the 2D array
// [Bins][Beams]
amp.Amplitude = make([][]float32, amp.Base.NumElements)
for i := range amp.Amplitude {
amp.Amplitude[i] = make([]float32, amp.Base.ElementMultiplier)
}
// Not enough data
if uint32(len(data)) < amp.Base.NumElements*amp.Base.ElementMultiplier*uint32(BytesInFloat) {
return
}
// Set each beam and bin data
ptr := 0
for beam := 0; beam < int(amp.Base.ElementMultiplier); beam++ {
for bin := 0; bin < int(amp.Base.NumElements); bin++ {
// Get the location of the data
ptr = GetBinBeamIndex(int(amp.Base.NameLen), int(amp.Base.NumElements), beam, bin)
// Set the data to float
bits := binary.LittleEndian.Uint32(data[ptr : ptr+BytesInFloat])
amp.Amplitude[bin][beam] = math.Float32frombits(bits)
}
}
}
func (cursor *Cursor) interpretBytesAsTime(data []byte) time.Time {
integer := cursor.interpretBytesAsInteger(data)
var date_time time.Time
if cursor.mode == IntegerMode {
if cursor.epoch_unit == SecondsSinceEpoch {
date_time = cursor.epoch_time.Add(time.Duration(integer) * time.Second)
} else if cursor.epoch_unit == DaysSinceEpoch {
date_time = cursor.epoch_time.Add(time.Duration(integer) * 24 * time.Hour)
}
} else if cursor.mode == FloatingPointMode {
var float float64
if cursor.fp_length == 4 {
float = float64(math.Float32frombits(uint32(integer)))
} else {
float = math.Float64frombits(integer)
}
if cursor.epoch_unit == SecondsSinceEpoch {
date_time = cursor.epoch_time.Add(time.Duration(float * float64(time.Second)))
} else {
date_time = cursor.epoch_time.Add(time.Duration(float * 24 * float64(time.Hour)))
}
} else {
date_time = cursor.epoch_time
}
return date_time.UTC()
}