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Finish development of fastnbt

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This commit is contained in:
Tnze
2023-04-24 21:59:30 +08:00
parent ad3f69e40b
commit 37d4179bb2
4 changed files with 169 additions and 29 deletions
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18
nbt/fastnbt/decode.go
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@ -1,6 +1,7 @@
package fastnbt
import (
"encoding/binary"
"errors"
"fmt"
"io"
@ -8,10 +9,6 @@ import (
"github.com/Tnze/go-mc/nbt"
)
//func (v *Value) Parse(data []byte) {
// // TODO
//}
func (v *Value) UnmarshalNBT(tagType byte, r nbt.DecoderReader) error {
v.tag = tagType
var buf [8]byte
@ -49,7 +46,7 @@ func (v *Value) UnmarshalNBT(tagType byte, r nbt.DecoderReader) error {
}
v.data = append(v.data[:0], make([]byte, 4+n)...)
v.data[0], v.data[1], v.data[2], v.data[3] = byte(n>>24), byte(n>>16), byte(n>>8), byte(n)
binary.BigEndian.PutUint32(v.data, uint32(n))
_, err = io.ReadFull(r, v.data[4:])
if err != nil {
@ -63,7 +60,7 @@ func (v *Value) UnmarshalNBT(tagType byte, r nbt.DecoderReader) error {
}
v.data = append(v.data[:0], make([]byte, 2+n)...)
v.data[0], v.data[1] = byte(n>>8), byte(n)
binary.BigEndian.PutUint16(v.data, uint16(n))
_, err = io.ReadFull(r, v.data[2:])
if err != nil {
@ -119,7 +116,7 @@ func (v *Value) UnmarshalNBT(tagType byte, r nbt.DecoderReader) error {
}
v.data = append(v.data[:0], make([]byte, 4+n*4)...)
v.data[0], v.data[1], v.data[2], v.data[3] = byte(n>>24), byte(n>>16), byte(n>>8), byte(n)
binary.BigEndian.PutUint32(v.data, uint32(n))
_, err = io.ReadFull(r, v.data[4:])
if err != nil {
@ -133,7 +130,7 @@ func (v *Value) UnmarshalNBT(tagType byte, r nbt.DecoderReader) error {
}
v.data = append(v.data[:0], make([]byte, 4+n*8)...)
v.data[0], v.data[1], v.data[2], v.data[3] = byte(n>>24), byte(n>>16), byte(n>>8), byte(n)
binary.BigEndian.PutUint32(v.data, uint32(n))
_, err = io.ReadFull(r, v.data[4:])
if err != nil {
@ -161,14 +158,13 @@ func readTag(r nbt.DecoderReader) (tagType byte, tagName string, err error) {
func readInt16(r nbt.DecoderReader) (int16, error) {
var data [2]byte
_, err := io.ReadFull(r, data[:])
return int16(data[0])<<8 | int16(data[1]), err
return int16(binary.BigEndian.Uint16(data[:])), err
}
func readInt32(r nbt.DecoderReader) (int32, error) {
var data [4]byte
_, err := io.ReadFull(r, data[:])
return int32(data[0])<<24 | int32(data[1])<<16 |
int32(data[2])<<8 | int32(data[3]), err
return int32(binary.BigEndian.Uint32(data[:])), err
}
func readString(r nbt.DecoderReader) (string, error) {