C#字节缓冲类ByteBuffer.docx
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- 上传时间:2023-02-02
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C#字节缓冲类ByteBuffer.docx
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C#字节缓冲类ByteBuffer
usingSystem;
usingSystem.Collections.Generic;
usingSystem.Linq;
usingSystem.Text;
usingSystem.Threading.Tasks;
///
///字节缓冲类
///
publicclassByteBuffer
{
//字节缓存区
privatebyte[]buf;
//读取索引
privateintreadIndex=0;
//写入索引
privateintwriteIndex=0;
//读取索引标记
privateintmarkReadIndex=0;
//写入索引标记
privateintmarkWirteIndex=0;
//缓存区字节数组的长度
privateintcapacity;
///
///构造方法
///
///
publicByteBuffer(intcapacity)
{
buf=newbyte[capacity];
this.capacity=capacity;
}
///
///构造方法
///
///
publicByteBuffer(byte[]bytes)
{
buf=bytes;
this.capacity=bytes.Length;
}
///
///构建一个capacity长度的字节缓存区ByteBuffer对象
///
///
///
publicstaticByteBufferAllocate(intcapacity)
{
returnnewByteBuffer(capacity);
}
///
///构建一个以bytes为字节缓存区的ByteBuffer对象,一般不推荐使用
///
///
///
publicstaticByteBufferAllocate(byte[]bytes)
{
returnnewByteBuffer(bytes);
}
///
///根据length长度,确定大于此leng的最近的2次方数,如length=7,则返回值为8
///
///
///
privateintFixLength(intlength)
{
intn=2;
intb=2;
while(b { b=2< n++; } returnb; } /// ///翻转字节数组,如果本地字节序列为低字节序列,则进行翻转以转换为高字节序列 /// /// /// privatebyte[]flip(byte[]bytes) { if(BitConverter.IsLittleEndian) { Array.Reverse(bytes); } returnbytes; } /// ///确定内部字节缓存数组的大小 /// /// /// /// privateintFixSizeAndReset(intcurrLen,intfutureLen) { if(futureLen>currLen) { //以原大小的2次方数的两倍确定内部字节缓存区大小 intsize=FixLength(currLen)*2; if(futureLen>size) { //以将来的大小的2次方的两倍确定内部字节缓存区大小 size=FixLength(futureLen)*2; } byte[]newbuf=newbyte[size]; Array.Copy(buf,0,newbuf,0,currLen); buf=newbuf; capacity=newbuf.Length; } returnfutureLen; } /// ///将bytes字节数组从startIndex开始的length字节写入到此缓存区 /// /// /// /// publicvoidWriteBytes(byte[]bytes,intstartIndex,intlength) { lock(this) { intoffset=length-startIndex; if(offset<=0)return; inttotal=offset+writeIndex; intlen=buf.Length; FixSizeAndReset(len,total); for(inti=writeIndex,j=startIndex;i { buf[i]=bytes[j]; } writeIndex=total; } } /// ///将字节数组中从0到length的元素写入缓存区 /// /// /// publicvoidWriteBytes(byte[]bytes,intlength) { WriteBytes(bytes,0,length); } /// ///将字节数组全部写入缓存区 /// /// publicvoidWriteBytes(byte[]bytes) { WriteBytes(bytes,bytes.Length); } /// ///将一个ByteBuffer的有效字节区写入此缓存区中 /// /// publicvoidWrite(ByteBufferbuffer) { if(buffer==null)return; if(buffer.ReadableBytes()<=0)return; WriteBytes(buffer.ToArray()); } /// ///将一个字符串写入此缓存区中 /// /// publicvoidWirteUTFString(stringvalue){ WriteBytes(Encoding.UTF8.GetBytes(value)); } /// ///写入一个int16数据 /// /// publicvoidWriteShort(shortvalue) { WriteBytes(flip(BitConverter.GetBytes(value))); } /// ///写入一个uint16数据 /// /// publicvoidWriteUshort(ushortvalue) { WriteBytes(flip(BitConverter.GetBytes(value))); } /// ///写入一个int32数据 /// /// publicvoidWriteInt(intvalue) { //byte[]array=newbyte[4]; //for(inti=3;i>=0;i--) //{ //array[i]=(byte)(value&0xff); //value=value>>8; //} //Array.Reverse(array); //Write(array); WriteBytes(flip(BitConverter.GetBytes(value))); } /// ///写入一个uint32数据 /// /// publicvoidWriteUint(uintvalue) { WriteBytes(flip(BitConverter.GetBytes(value))); } /// ///写入一个int64数据 /// /// publicvoidWriteLong(longvalue) { WriteBytes(flip(BitConverter.GetBytes(value))); } /// ///写入一个uint64数据 /// /// publicvoidWriteUlong(ulongvalue) { WriteBytes(flip(BitConverter.GetBytes(value))); } /// ///写入一个float数据 /// /// publicvoidWriteFloat(floatvalue) { WriteBytes(flip(BitConverter.GetBytes(value))); } /// ///写入一个byte数据 /// /// publicvoidWriteByte(bytevalue) { lock(this) { intafterLen=writeIndex+1; intlen=buf.Length; FixSizeAndReset(len,afterLen); buf[writeIndex]=value; writeIndex=afterLen; } } /// ///写入一个double类型数据 /// /// publicvoidWriteDouble(doublevalue) { WriteBytes(flip(BitConverter.GetBytes(value))); } /// ///读取一个字节 /// /// publicbyteReadByte() { byteb=buf[readIndex]; readIndex++; returnb; } /// ///从读取索引位置开始读取len长度的字节数组 /// /// privatebyte[]Read(intlen) { byte[]bytes=newbyte[len]; Array.Copy(buf,readIndex,bytes,0,len); if(BitConverter.IsLittleEndian) { Array.Reverse(bytes); } readIndex+=len; returnbytes; } /// ///读取一个uint16数据 /// /// publicushortReadUshort() { returnBitConverter.ToUInt16(Read (2),0); } /// ///读取一个int16数据 /// /// publicshortReadShort() { returnBitConverter.ToInt16(Read (2),0); } /// ///读取一个uint32数据 /// /// publicuintReadUint() { returnBitConverter.ToUInt32(Read(4),0); } /// ///读取一个int32数据 /// /// publicintReadInt() { returnBitConverter.ToInt32(Read(4),0); } /// ///读取一个uint64数据 /// /// publiculongReadUlong() { returnBitConverter.ToUInt64(Read(8),0); } /// ///读取一个long数据 /// /// publiclongReadLong() { returnBitConverter.ToInt64(Read(8),0); } /// ///读取一个float数据 /// /// publicfloatReadFloat() { returnBitConverter.ToSingle(Read(4),0); } /// ///读取一个double数据 /// /// publicdoubleReadDouble() { returnBitConverter.ToDouble(Read(8),0); } /// ///从读取索引位置开始读取len长度的字节到disbytes目标字节数组中 /// /// /// publicvoidReadBytes(byte[]disbytes,intdisstart,intlen) { intsize=disstart+len; for(inti=disstart;i { disbytes[i]=this.ReadByte(); } } /// ///清除已读字节并重建缓存区 /// publicvoidDiscardReadBytes() { if(readIndex<=0)return; intlen=buf.Length-readIndex; byte[]newbuf=newbyte[len]; Array.Copy(buf,readIndex,newbuf,0,len); buf=newbuf; writeIndex-=readIndex; markReadIndex-=readIndex; if(markReadIndex<0) { markReadIndex=readIndex; } markWirteIndex-=readIndex; if(markWirteIndex<0||markWirteIndex { markWirteIndex=writeIndex; } readIndex=0; } /// ///清空此对象 /// publicvoidClear() { buf=newbyte[buf.Length]; readIndex=0; writeIndex=0; markReadIndex=0; markWirteIndex=0; } /// ///设置开始读取的索引 /// /// publicvoidSetReaderIndex(intindex) { if(index<0)return; readIndex=index; } /// ///标记读取的索引位置 /// /// publicvoidMarkReaderIndex() { markReadIndex=readIndex; } /// ///标记写入的索引位置 /// publicvoidMarkWriterIndex() { markWirteIndex=writeIndex; } /// ///将读取的索引位置重置为标记的读取索引位置 /// publicvoidResetReaderIndex() { readIndex=markReadIndex; } /// ///将写入的索引位置重置为标记的写入索引位置 /// publicvoidResetWriterIndex() { writeIndex=markWirteIndex; } /// ///可读的有效字节数 /// publicintReadableBytes() { returnwriteIndex-readIndex; } /// ///获取可读的字节数组 /// publicbyte[]ToArray() { byte[]bytes=newbyte[writeIndex]; Array.Copy(buf,0,bytes,0,bytes.Length); returnbytes; } /// ///获取缓存区大小 /// publicintGetCapacity() { returnthis.capacity; } }
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