lifegpc/GARbro-crskycode
1
0
Fork 0
mirror of https://github.com/crskycode/GARbro.git synced 2026-07-08 01:30:18 +08:00
Code Issues Packages Projects Releases Wiki Activity

moved common stream classes to separate file.

Browse Source
This commit is contained in:
morkt
2016-03-13 00:32:02 +04:00
parent b569c81c50
commit 834409f2a4
5 changed files with 389 additions and 357 deletions
Download Patch File Download Diff File Expand all files Collapse all files

142
ArcFormats/Cri/ImageSPC.cs
View File

@@ -65,146 +65,4 @@ namespace GameRes.Formats.Cri
throw new System.NotImplementedException ("SpcFormat.Write not implemented");
}
}
public class SeekableStream : Stream
{
Stream m_source;
Stream m_buffer;
bool m_should_dispose;
bool m_source_depleted;
long m_read_pos;
public SeekableStream (Stream input, bool leave_open = false)
{
m_source = input;
m_should_dispose = !leave_open;
m_read_pos = 0;
if (m_source.CanSeek)
{
m_buffer = m_source;
m_source_depleted = true;
}
else
{
m_buffer = new MemoryStream();
m_source_depleted = false;
}
}
#region IO.Stream Members
public override bool CanRead { get { return m_buffer.CanRead; } }
public override bool CanSeek { get { return true; } }
public override bool CanWrite { get { return false; } }
public override long Length
{
get
{
if (!m_source_depleted)
{
m_buffer.Seek (0, SeekOrigin.End);
m_source.CopyTo (m_buffer);
m_source_depleted = true;
}
return m_buffer.Length;
}
}
public override long Position
{
get { return m_read_pos; }
set { m_read_pos = value; }
}
public override int Read (byte[] buffer, int offset, int count)
{
int read, total_read = 0;
if (m_source_depleted)
{
m_buffer.Position = m_read_pos;
total_read = m_buffer.Read (buffer, offset, count);
m_read_pos += total_read;
return total_read;
}
if (m_read_pos < m_buffer.Length)
{
int available = (int)Math.Min (m_buffer.Length-m_read_pos, count);
m_buffer.Position = m_read_pos;
total_read = m_buffer.Read (buffer, offset, available);
m_read_pos += total_read;
count -= total_read;
if (0 == count)
return total_read;
offset += total_read;
}
else if (count > 0)
{
m_buffer.Seek (0, SeekOrigin.End);
while (m_read_pos > m_buffer.Length)
{
int available = (int)Math.Min (m_read_pos - m_buffer.Length, count);
read = m_source.Read (buffer, offset, available);
if (0 == read)
{
m_source_depleted = true;
return 0;
}
m_buffer.Write (buffer, offset, read);
}
}
read = m_source.Read (buffer, offset, count);
m_read_pos += read;
m_buffer.Write (buffer, offset, read);
return total_read + read;
}
public override void Flush()
{
}
public override long Seek (long offset, SeekOrigin origin)
{
if (SeekOrigin.Begin == origin)
m_read_pos = offset;
else if (SeekOrigin.Current == origin)
m_read_pos += offset;
else
m_read_pos = Length + offset;
return m_read_pos;
}
public override void SetLength (long length)
{
throw new NotSupportedException ("SeekableStream.SetLength method is not supported");
}
public override void Write (byte[] buffer, int offset, int count)
{
throw new NotSupportedException ("SeekableStream.Write method is not supported");
}
public override void WriteByte (byte value)
{
throw new NotSupportedException ("SeekableStream.WriteByte method is not supported");
}
#endregion
#region IDisposable Members
bool _disposed = false;
protected override void Dispose (bool disposing)
{
if (_disposed)
return;
if (disposing)
{
if (m_should_dispose)
m_source.Dispose();
if (m_buffer != m_source)
m_buffer.Dispose();
}
_disposed = true;
base.Dispose (disposing);
}
#endregion
}
}