1 files changed, 66 insertions, 0 deletions

diff --git a/src/deflate.h b/src/deflate.h
new file mode 100644
index 0000000..f835cfc
--- /dev/null
+++ b/src/deflate.h
@@ -0,0 +1,66 @@
+/*
+ * Copyright (C) 2007-2011 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_DEFLATE_H
+#define BU_DEFLATE_H
+
+#include <stdint.h>
+
+#include "bu/filter.h"
+
+namespace Bu
+{
+        /**
+         * Provides Deflate (LZ77) support via zlib.  This provides zlib, raw, and
+         * gzip stream types.  By default it will autodetect the input type and
+         * encode into a raw deflate stream.
+         *
+         *@ingroup Streams
+         *@ingroup Compression
+         */
+        class Deflate : public Bu::Filter
+        {
+        public:
+                enum Format
+                {
+                        Raw                     = 0x01,
+                        Zlib            = 0x02,
+                        Gzip            = 0x03,
+                        AutoDetect      = 0x04,
+
+                        AutoRaw         = 0x04|0x01,
+                        AutoZlib        = 0x04|0x02,
+                        AutoGzip        = 0x04|0x03
+                };
+
+                Deflate( Bu::Stream &rNext, int nCompression=-1, Format eFmt=AutoZlib );
+                virtual ~Deflate();
+
+                virtual void start();
+                virtual Bu::size stop();
+                virtual Bu::size read( void *pBuf, Bu::size nBytes );
+                virtual Bu::size write( const void *pBuf, Bu::size nBytes );
+
+                virtual bool isOpen();
+                virtual bool isEos();
+
+                Bu::size getCompressedSize();
+
+        private:
+                void zError( int code );
+                void *prState;
+                bool bReading;
+                int nCompression;
+                char *pBuf;
+                uint32_t nBufSize;
+                Bu::size sTotalOut;
+                Format eFmt;
+                bool bEos;
+        };
+}
+
+#endif