Added the new QueueBuf. It's brilliant, and I've wanted it for a long time.

...I mean brilliant as in cool.

1 files changed, 62 insertions, 0 deletions

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