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property_decoder.go
177 lines (137 loc) · 3.68 KB
/
property_decoder.go
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package manta
import (
"math"
)
func decodeLeUint64(r *reader, f *dtField) interface{} {
return r.readLeUint64()
}
func decodeHandle(r *reader, f *dtField) interface{} {
return r.readVarUint32()
}
func decodeByte(r *reader, f *dtField) interface{} {
return r.readBits(8)
}
func decodeShort(r *reader, f *dtField) interface{} {
return r.readBits(16)
}
func decodeUnsigned(r *reader, f *dtField) interface{} {
switch f.Encoder {
case "fixed64":
return decodeLeUint64(r, f)
}
return r.readVarUint64()
}
func decodeSigned(r *reader, f *dtField) interface{} {
return r.readVarInt32()
}
func decodeSigned64(r *reader, f *dtField) interface{} {
return r.readVarInt64()
}
func decodeFixed32(r *reader, f *dtField) interface{} {
return r.readBits(32)
}
func decodeFixed64(r *reader, f *dtField) interface{} {
ret := uint64(r.readBits(32))
ret = (ret << 32) | uint64(r.readBits(32))
return ret
}
func decodeBoolean(r *reader, f *dtField) interface{} {
return r.readBoolean()
}
func decodeFloat(r *reader, f *dtField) interface{} {
// Parse specific encoders
switch f.Encoder {
case "coord":
return r.readCoord()
}
// Decode as noscale if it has an appropriate bitcount.
if f.BitCount == nil || (*f.BitCount <= 0 || *f.BitCount >= 32) {
return decodeFloatNoscale(r, f)
}
// Otherwise fall back to quantized decoding.
return decodeQuantized(r, f)
}
func decodeFloatNoscale(r *reader, f *dtField) interface{} {
return math.Float32frombits(r.readBits(uint32(*f.BitCount)))
}
func decodeQuantized(r *reader, f *dtField) interface{} {
return newQuantizedFloatDecoder(f).decode(r)
}
func decodeSimTime(r *reader, f *dtField) interface{} {
return float32(r.readVarUint32()) * (1.0 / 30)
}
func decodeString(r *reader, f *dtField) interface{} {
return r.readString()
}
func decodeVector(r *reader, f *dtField) interface{} {
return r.readVarUint32()
}
func decodeClass(r *reader, f *dtField) interface{} {
return r.readVarUint32()
}
func decodeFVector(r *reader, f *dtField) interface{} {
// Parse specific encoders
switch f.Encoder {
case "normal":
return r.read3BitNormal()
}
return []float32{decodeFloat(r, f).(float32), decodeFloat(r, f).(float32), decodeFloat(r, f).(float32)}
}
func decodeNop(r *reader, f *dtField) interface{} {
return 0
}
func decodePointer(r *reader, f *dtField) interface{} {
// Seems to be encoded as a single bit, not sure what to make of it
if !r.readBoolean() {
_panicf("Figure out how this works")
}
return 0
}
func decodeQAngle(r *reader, f *dtField) interface{} {
ret := [3]float32{0.0, 0.0, 0.0}
// Parse specific encoders
switch f.Encoder {
case "qangle_pitch_yaw":
if f.BitCount != nil && f.Flags != nil && (*f.Flags&0x20 != 0) {
_panicf("Special Case: Unkown for now")
}
ret[0] = r.readAngle(uint32(*f.BitCount))
ret[1] = r.readAngle(uint32(*f.BitCount))
return ret
}
// Parse a standard angle
if f.BitCount != nil && *f.BitCount == 32 {
_panicf("Special Case: Unkown for now")
} else if f.BitCount != nil && *f.BitCount != 0 {
ret[0] = r.readAngle(uint32(*f.BitCount))
ret[1] = r.readAngle(uint32(*f.BitCount))
ret[2] = r.readAngle(uint32(*f.BitCount))
return ret
} else {
rX := r.readBoolean()
rY := r.readBoolean()
rZ := r.readBoolean()
if rX {
ret[0] = r.readCoord()
}
if rY {
ret[1] = r.readCoord()
}
if rZ {
ret[2] = r.readCoord()
}
return ret
}
_panicf("No valid encoding determined")
return ret
}
func decodeComponent(r *reader, f *dtField) interface{} {
return r.readBits(1)
}
func decodeHSequence(r *reader, f *dtField) interface{} {
// wrong, just testing
return r.readBits(1)
}
func decodeVector2D(r *reader, f *dtField) interface{} {
return []float32{r.readFloat(), r.readFloat()}
}