From 8baf7e1e75a185c742dc6d5b27e50058635e5522 Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Mon, 10 May 2010 03:31:08 +0000
Subject: Added the new QueueBuf.  It's brilliant, and I've wanted it for a
 long time.

...I mean brilliant as in cool.
---
 src/queuebuf.h | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)
 create mode 100644 src/queuebuf.h

(limited to 'src/queuebuf.h')

diff --git a/src/queuebuf.h b/src/queuebuf.h
new file mode 100644
index 0000000..3591959
--- /dev/null
+++ b/src/queuebuf.h
@@ -0,0 +1,62 @@
+/*
+ * Copyright (C) 2007-2010 Xagasoft, All rights reserved.
+ *
+ * This file is part of the libbu++ library and is released under the
+ * terms of the license contained in the file LICENSE.
+ */
+
+#ifndef BU_QUEUE_BUF_H
+#define BU_QUEUE_BUF_H
+
+#include "bu/stream.h"
+
+namespace Bu
+{
+	/**
+	 * A queuing buffer stream class.  All data written to this class is
+	 * appended to it, there is no stored position.  All data read is read
+	 * from the begining and then thrown away.  It operates by using a linked
+	 * list of small buffers, and deallocating or reusing them when it can.
+	 */
+	class QueueBuf : public Bu::Stream
+	{
+	public:
+		QueueBuf( int iBlockSize=256 );
+		virtual ~QueueBuf();
+
+		int getSize();
+
+		virtual void close();
+		virtual size_t read( void *pBuf, size_t nBytes );
+		virtual size_t peek( void *pBuf, size_t nBytes );
+		virtual size_t write( const void *pBuf, size_t nBytes );
+		virtual long tell();
+		virtual void seek( long offset );
+		virtual void setPos( long pos );
+		virtual void setPosEnd( long pos );
+		virtual bool isEos();
+		virtual bool isOpen();
+		virtual void flush();
+		virtual bool canRead();
+		virtual bool canWrite();
+		virtual bool isReadable();
+		virtual bool isWritable();
+		virtual bool isSeekable();
+		virtual bool isBlocking();
+		virtual void setBlocking( bool bBlocking=true );
+
+	private:
+		void addBlock();
+		void removeBlock();
+
+	private:
+		int iBlockSize;
+		int iReadOffset;
+		int iWriteOffset;
+		size_t iTotalSize;
+		typedef Bu::List<char *> BlockList;
+		BlockList lBlocks;
+	};
+};
+
+#endif
-- 
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