/// <summary>
/// 解压缩数据
/// </summary>
/// <param name="compressData">压缩数据</param>
/// <param name="type">压缩类型</param>
/// <param name="startIndex">起始位置</param>
/// <param name="count">解压缩字节数</param>
/// <returns>解压缩后的数据</returns>
public static byte[] getDeCompress(this byte[] compressData, compression type, int startIndex, int count)
{
using (memoryStream stream = compressData.getDeCompressStream(type, startIndex, count))
{
return(stream != null?stream.ToArray() : nullValue <byte> .Array);
}
}
/// <summary>
/// 解压缩数据
/// </summary>
/// <param name="compressData">压缩数据</param>
/// <param name="type">压缩类型</param>
/// <param name="startIndex">起始位置</param>
/// <param name="count">解压缩字节数</param>
/// <returns>解压缩后的数据</returns>
public static memoryStream getDeCompressStream(this byte[] compressData, compression type, int startIndex, int count)
{
array.range range = new array.range(compressData.length(), startIndex, count);
if (count == range.GetCount)
{
using (Stream memoryStream = new MemoryStream(compressData, 0, compressData.Length))
using (Stream compressStream = memoryStream.toCompressStream(CompressionMode.Decompress, false, type))
{
memoryStream dataStream = new memoryStream(compressData.Length);
byte[] buffer = new byte[config.pub.Default.StreamBufferLength];
for (int readLength = compressStream.Read(buffer, 0, config.pub.Default.StreamBufferLength);
readLength != 0;
readLength = compressStream.Read(buffer, 0, config.pub.Default.StreamBufferLength))
{
dataStream.Write(buffer, 0, readLength);
}
return(dataStream);
}
}
else if (count == 0)
{
return(null);
}
log.Default.Throw(log.exceptionType.IndexOutOfRange);
return(null);
}
/// <summary>
/// 写数据
/// </summary>
/// <param name="stream">数据</param>
public void Write(memoryStream stream)
{
if (stream != null)
{
prepLength(stream.Length);
Buffer.BlockCopy(stream.array, 0, array, Length, stream.Length);
Length += stream.Length;
}
}
public void UnsafeWrite(memoryStream stream)
{
Buffer.BlockCopy(stream.array, 0, array, Length, stream.Length);
Length += stream.Length;
}
/// <summary>
/// 写数据
/// </summary>
/// <param name="stream">数据,不能为null</param>
public void Write(memoryStream stream)
{
Buffer.BlockCopy(stream.array, 0, Stream.array, Stream.Length, stream.Length);
Stream.Length += stream.Length;
}
