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(XoredStream): moved to CommonStreams.

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This commit is contained in:
morkt 2016-10-08 05:02:48 +04:00
parent d1060aeda6
commit 38cc4c32a9
2 changed files with 51 additions and 97 deletions
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51
ArcFormats/CommonStreams.cs
View File

@ -393,4 +393,55 @@ namespace GameRes.Formats
}
#endregion
}
public class XoredStream : ProxyStream
{
private byte m_key;
public XoredStream (Stream stream, byte key, bool leave_open = false)
: base (stream, leave_open)
{
m_key = key;
}
#region System.IO.Stream methods
public override int Read (byte[] buffer, int offset, int count)
{
int read = BaseStream.Read (buffer, offset, count);
for (int i = 0; i < read; ++i)
{
buffer[offset+i] ^= m_key;
}
return read;
}
public override int ReadByte ()
{
int b = BaseStream.ReadByte();
if (-1 != b)
{
b ^= m_key;
}
return b;
}
byte[] write_buf;
public override void Write (byte[] buffer, int offset, int count)
{
if (null == write_buf || write_buf.Length < count)
write_buf = new byte[count];
for (int i = 0; i < count; ++i)
{
write_buf[i] = (byte)(buffer[offset+i] ^ m_key);
}
BaseStream.Write (write_buf, 0, count);
}
public override void WriteByte (byte value)
{
BaseStream.WriteByte ((byte)(value ^ m_key));
}
#endregion
}
}

97
ArcFormats/ScenePlayer/ImagePMP.cs
View File

@ -64,101 +64,4 @@ namespace GameRes.Formats.ScenePlayer
return base.Read (zstream, info);
}
}
public class XoredStream : Stream
{
private Stream m_stream;
private byte m_key;
private bool m_should_dispose;
public Stream BaseStream { get { return m_stream; } }
public override bool CanRead { get { return m_stream.CanRead; } }
public override bool CanSeek { get { return m_stream.CanSeek; } }
public override bool CanWrite { get { return m_stream.CanWrite; } }
public override long Length { get { return m_stream.Length; } }
public override long Position
{
get { return m_stream.Position; }
set { m_stream.Position = value; }
}
public XoredStream (Stream stream, byte key, bool leave_open = false)
{
m_stream = stream;
m_key = key;
m_should_dispose = !leave_open;
}
#region System.IO.Stream methods
public override void Flush()
{
m_stream.Flush();
}
public override long Seek (long offset, SeekOrigin origin)
{
return m_stream.Seek (offset, origin);
}
public override void SetLength (long length)
{
m_stream.SetLength (length);
}
public override int Read (byte[] buffer, int offset, int count)
{
int read = m_stream.Read (buffer, offset, count);
for (int i = 0; i < read; ++i)
{
buffer[offset+i] ^= m_key;
}
return read;
}
public override int ReadByte ()
{
int b = m_stream.ReadByte();
if (-1 != b)
{
b ^= m_key;
}
return b;
}
byte[] write_buf;
public override void Write (byte[] buffer, int offset, int count)
{
if (null == write_buf || write_buf.Length < count)
write_buf = new byte[count];
for (int i = 0; i < count; ++i)
{
write_buf[i] = (byte)(buffer[offset+i] ^ m_key);
}
m_stream.Write (write_buf, 0, count);
}
public override void WriteByte (byte value)
{
m_stream.WriteByte ((byte)(value ^ m_key));
}
#endregion
#region IDisposable Members
bool disposed = false;
protected override void Dispose (bool disposing)
{
if (!disposed)
{
if (disposing && m_should_dispose)
{
m_stream.Dispose();
}
disposed = true;
base.Dispose (disposing);
}
}
#endregion
}
}