107 lines
1.9 KiB
C#
107 lines
1.9 KiB
C#
using System;
|
|
using System.IO;
|
|
|
|
namespace AspClassic.Scripting.Utils;
|
|
|
|
public sealed class ConsoleInputStream : Stream
|
|
{
|
|
private const int MinimalBufferSize = 4096;
|
|
|
|
public static readonly ConsoleInputStream Instance = new ConsoleInputStream();
|
|
|
|
private readonly Stream _input;
|
|
|
|
private readonly object _lock = new object();
|
|
|
|
private readonly byte[] _buffer = new byte[4096];
|
|
|
|
private int _bufferPos;
|
|
|
|
private int _bufferSize;
|
|
|
|
public override bool CanRead => true;
|
|
|
|
public override bool CanSeek => false;
|
|
|
|
public override bool CanWrite => false;
|
|
|
|
public override long Length
|
|
{
|
|
get
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
}
|
|
|
|
public override long Position
|
|
{
|
|
get
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
set
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
}
|
|
|
|
private ConsoleInputStream()
|
|
{
|
|
_input = Console.OpenStandardInput();
|
|
}
|
|
|
|
public override int Read(byte[] buffer, int offset, int count)
|
|
{
|
|
lock (_lock)
|
|
{
|
|
int num;
|
|
if (_bufferSize > 0)
|
|
{
|
|
num = Math.Min(count, _bufferSize);
|
|
Buffer.BlockCopy(_buffer, _bufferPos, buffer, offset, num);
|
|
_bufferPos += num;
|
|
_bufferSize -= num;
|
|
offset += num;
|
|
count -= num;
|
|
}
|
|
else
|
|
{
|
|
num = 0;
|
|
}
|
|
if (count > 0)
|
|
{
|
|
if (count < 4096)
|
|
{
|
|
int num2 = _input.Read(_buffer, 0, 4096);
|
|
int num3 = Math.Min(num2, count);
|
|
Buffer.BlockCopy(_buffer, 0, buffer, offset, num3);
|
|
_bufferSize = num2 - num3;
|
|
_bufferPos = num3;
|
|
return num + num3;
|
|
}
|
|
return num + _input.Read(buffer, offset, count);
|
|
}
|
|
return num;
|
|
}
|
|
}
|
|
|
|
public override void Flush()
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
public override long Seek(long offset, SeekOrigin origin)
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
public override void SetLength(long value)
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
|
|
public override void Write(byte[] buffer, int offset, int count)
|
|
{
|
|
throw new NotSupportedException();
|
|
}
|
|
}
|