gonet/bytebuffer.go at master · cpp2go/gonet · GitHub

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package gonet

const (
presize=0
initsize=10
)

typeByteBufferstruct {
_buffer []byte
_prependSizeint
_readerIndexint
_writerIndexint
}

funcNewByteBuffer() *ByteBuffer {
return&ByteBuffer{
_buffer: make([]byte, presize+initsize),
_prependSize: presize,
_readerIndex: presize,
_writerIndex: presize,
	}
}

func (this*ByteBuffer) Append(buff...byte) {
size:=len(buff)
ifsize==0 {
return
	}
this.WrGrow(size)
copy(this._buffer[this._writerIndex:], buff)
this.WrFlip(size)
}

func (this*ByteBuffer) WrBuf() []byte {
ifthis._writerIndex>=len(this._buffer) {
returnnil
	}
returnthis._buffer[this._writerIndex:]
}

func (this*ByteBuffer) WrSize() int {
returnlen(this._buffer) -this._writerIndex
}

func (this*ByteBuffer) WrFlip(sizeint) {
this._writerIndex+=size
}

func (this*ByteBuffer) WrGrow(sizeint) {
ifsize>this.WrSize() {
this.wrreserve(size)
	}
}

func (this*ByteBuffer) RdBuf() []byte {
ifthis._readerIndex>=len(this._buffer) {
returnnil
	}
returnthis._buffer[this._readerIndex:]
}

func (this*ByteBuffer) RdReady() bool {
returnthis._writerIndex>this._readerIndex
}

func (this*ByteBuffer) RdSize() int {
returnthis._writerIndex-this._readerIndex
}

func (this*ByteBuffer) RdFlip(sizeint) {
ifsize<this.RdSize() {
this._readerIndex+=size
	} else {
this.Reset()
	}
}

func (this*ByteBuffer) Reset() {
this._readerIndex=this._prependSize
this._writerIndex=this._prependSize
}

func (this*ByteBuffer) MaxSize() int {
returnlen(this._buffer)
}

func (this*ByteBuffer) wrreserve(sizeint) {
ifthis.WrSize()+this._readerIndex<size+this._prependSize {
tmpbuff:=make([]byte, this._writerIndex+size)
copy(tmpbuff, this._buffer)
this._buffer=tmpbuff
	} else {
readable:=this.RdSize()
copy(this._buffer[this._prependSize:], this._buffer[this._readerIndex:this._writerIndex])
this._readerIndex=this._prependSize
this._writerIndex=this._readerIndex+readable
	}
}

func (this*ByteBuffer) Prepend(buff []byte) bool {
size:=len(buff)
ifthis._readerIndex<size {
returnfalse
	}
this._readerIndex-=size
copy(this._buffer[this._readerIndex:], buff)
returntrue
}