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(InputProxyStream): generalization of input filters.

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This commit is contained in:
morkt
2016-07-02 06:06:32 +04:00
parent cc22f988c6
commit 883ee94a7e
8 changed files with 39 additions and 174 deletions
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55
ArcFormats/CommonStreams.cs
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@@ -91,7 +91,26 @@ namespace GameRes.Formats
}
}
public class PrefixStream : ProxyStream
public class InputProxyStream : ProxyStream
{
public InputProxyStream (Stream input, bool leave_open = false) : base (input, leave_open)
{
}
public override bool CanWrite { get { return false; } }
public override void Write (byte[] buffer, int offset, int count)
{
throw new NotSupportedException ("Stream.Write method is not supported");
}
public override void SetLength (long length)
{
throw new NotSupportedException ("Stream.SetLength method is not supported");
}
}
public class PrefixStream : InputProxyStream
{
byte[] m_header;
long m_position = 0;
@@ -102,7 +121,6 @@ namespace GameRes.Formats
m_header = header;
}
public override bool CanWrite { get { return false; } }
public override long Length { get { return BaseStream.Length + m_header.Length; } }
public override long Position
{
@@ -166,28 +184,13 @@ namespace GameRes.Formats
m_position++;
return b;
}
public override void SetLength (long length)
{
throw new NotSupportedException ("PrefixStream.SetLength method is not supported");
}
public override void Write (byte[] buffer, int offset, int count)
{
throw new NotSupportedException ("PrefixStream.Write method is not supported");
}
public override void WriteByte (byte value)
{
throw new NotSupportedException ("PrefixStream.WriteByte method is not supported");
}
}
/// <summary>
/// Represents a region within existing stream.
/// Underlying stream should allow seeking (CanSeek == true).
/// </summary>
public class StreamRegion : ProxyStream
public class StreamRegion : InputProxyStream
{
private long m_begin;
private long m_end;
@@ -206,7 +209,6 @@ namespace GameRes.Formats
}
public override bool CanSeek { get { return true; } }
public override bool CanWrite { get { return false; } }
public override long Length { get { return m_end - m_begin; } }
public override long Position
{
@@ -245,21 +247,6 @@ namespace GameRes.Formats
else
return -1;
}
public override void SetLength (long length)
{
throw new NotSupportedException ("StreamRegion.SetLength method is not supported");
}
public override void Write (byte[] buffer, int offset, int count)
{
throw new NotSupportedException ("StreamRegion.Write method is not supported");
}
public override void WriteByte (byte value)
{
throw new NotSupportedException ("StreamRegion.WriteByte method is not supported");
}
}
/// <summary>