/// <summary>
/// 从流中读入一个缓冲数组
/// </summary>
/// <param name="stream">要读取的流</param>
/// <param name="length">读取的字节长度</param>
/// <param name="lengthRequired">是否要求指定的字节数，如果读取不到，则抛出异常</param>
/// <returns>缓冲数组</returns>
public static byte[] ReadBuffer(this Stream stream, int length, bool lengthRequired = true)
{
var count = 0;
var buffer = stream.ReadBuffer(length, out count);
if (count < length && lengthRequired)
{
throw new EndOfStreamException();
}
return(buffer);
}
/// <summary>
/// 从流中读入一个 <see cref="T:System.Int16"/>
/// </summary>
/// <param name="stream">要读取的流</param>
/// <returns>读取的 <see cref="T:System.Int16"/></returns>
public static short ReadInt16(this System.IO.Stream stream)
{
return(BitConverter.ToInt16(stream.ReadBuffer(2), 0));
}
/// <summary>
/// 从流中读入一个 <see cref="T:System.Int64"/>
/// </summary>
/// <param name="stream">要读取的流</param>
/// <returns>读取的 <see cref="T:System.Int64"/></returns>
public static double ReadDouble(this Stream stream)
{
return(BitConverter.ToDouble(stream.ReadBuffer(sizeof(double)), 0));
}
/// <summary>
/// 从流中读入一个 <see cref="T:System.Int64"/>
/// </summary>
/// <param name="stream">要读取的流</param>
/// <returns>读取的 <see cref="T:System.Int64"/></returns>
public static long ReadInt64(this Stream stream)
{
return(BitConverter.ToInt64(stream.ReadBuffer(8), 0));
}
/// <summary>
/// 从流中读入一个 <see cref="T:System.Int32"/>
/// </summary>
/// <param name="stream">要读取的流</param>
/// <returns>读取的 <see cref="T:System.Int32"/></returns>
public static int ReadInt32(this Stream stream)
{
return(BitConverter.ToInt32(stream.ReadBuffer(4), 0));
}