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https://github.com/Mrs4s/MiraiGo.git
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b1279cf08f
* perf(writer): drop some lambda expressions * perf(writer): drop more lambda expressions * fix: resolve conflicts * perf(writer): drop more lambda expressions * fix: modify function name * perf(writer): drop more lambda expressions * fix: some error
148 lines
2.9 KiB
Go
148 lines
2.9 KiB
Go
package binary
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import (
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"bytes"
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"encoding/binary"
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"encoding/hex"
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)
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// Writer 写入
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type Writer bytes.Buffer
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func NewWriterF(f func(writer *Writer)) []byte {
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w := SelectWriter()
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f(w)
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b := append([]byte(nil), w.Bytes()...)
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w.put()
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return b
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}
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// OpenWriterF must call func cl to close
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func OpenWriterF(f func(*Writer)) (b []byte, cl func()) {
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w := SelectWriter()
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f(w)
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return w.Bytes(), w.put
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}
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func (w *Writer) AllocUInt16Head() (pos int) {
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pos = (*bytes.Buffer)(w).Len()
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(*bytes.Buffer)(w).Write([]byte{0, 0})
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return
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}
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/*
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func (w *Writer) WriteUInt16HeadAt(pos int) {
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newdata := (*bytes.Buffer)(w).Bytes()[pos:]
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binary.BigEndian.PutUint16(newdata, uint16(len(newdata)))
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}
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*/
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func (w *Writer) WriteUInt16HeadUsingTotalBufferLenAt(pos int) {
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binary.BigEndian.PutUint16((*bytes.Buffer)(w).Bytes()[pos:], uint16((*bytes.Buffer)(w).Len()))
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}
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func (w *Writer) WriteUInt16HeadExcludeSelfAt(pos int) {
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newdata := (*bytes.Buffer)(w).Bytes()[pos:]
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binary.BigEndian.PutUint16(newdata, uint16(len(newdata)-2))
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}
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func (w *Writer) AllocUInt32Head() (pos int) {
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pos = (*bytes.Buffer)(w).Len()
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(*bytes.Buffer)(w).Write([]byte{0, 0, 0, 0})
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return
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}
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func (w *Writer) WriteUInt32HeadAt(pos int) {
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newdata := (*bytes.Buffer)(w).Bytes()[pos:]
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binary.BigEndian.PutUint32(newdata, uint32(len(newdata)))
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}
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func (w *Writer) Write(b []byte) {
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(*bytes.Buffer)(w).Write(b)
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}
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func (w *Writer) WriteHex(h string) {
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b, _ := hex.DecodeString(h)
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w.Write(b)
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}
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func (w *Writer) WriteByte(b byte) error {
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return (*bytes.Buffer)(w).WriteByte(b)
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}
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func (w *Writer) WriteUInt16(v uint16) {
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b := make([]byte, 2)
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binary.BigEndian.PutUint16(b, v)
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w.Write(b)
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}
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func (w *Writer) WriteUInt32(v uint32) {
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b := make([]byte, 4)
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binary.BigEndian.PutUint32(b, v)
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w.Write(b)
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}
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func (w *Writer) WriteUInt64(v uint64) {
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b := make([]byte, 8)
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binary.BigEndian.PutUint64(b, v)
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w.Write(b)
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}
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func (w *Writer) WriteString(v string) {
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w.WriteUInt32(uint32(len(v) + 4))
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(*bytes.Buffer)(w).WriteString(v)
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}
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func (w *Writer) WriteStringShort(v string) {
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w.WriteUInt16(uint16(len(v)))
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(*bytes.Buffer)(w).WriteString(v)
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}
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func (w *Writer) WriteBool(b bool) {
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if b {
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w.WriteByte(0x01)
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} else {
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w.WriteByte(0x00)
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}
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}
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func (w *Writer) EncryptAndWrite(key []byte, data []byte) {
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w.Write(NewTeaCipher(key).Encrypt(data))
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}
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func (w *Writer) WriteIntLvPacket(offset int, f func(*Writer)) {
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data, cl := OpenWriterF(f)
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w.WriteUInt32(uint32(len(data) + offset))
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w.Write(data)
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cl()
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}
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func (w *Writer) WriteBytesShort(data []byte) {
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w.WriteUInt16(uint16(len(data)))
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w.Write(data)
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}
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func (w *Writer) WriteTlvLimitedSize(data []byte, limit int) {
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if len(data) <= limit {
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w.WriteBytesShort(data)
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return
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}
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w.WriteBytesShort(data[:limit])
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}
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func (w *Writer) Bytes() []byte {
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return (*bytes.Buffer)(w).Bytes()
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}
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func (w *Writer) Reset() {
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(*bytes.Buffer)(w).Reset()
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}
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func (w *Writer) Grow(n int) {
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(*bytes.Buffer)(w).Grow(n)
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}
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func (w *Writer) put() {
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PutWriter(w)
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}
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