michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
michael@0:  */
michael@0: 
michael@0: #ifndef _nsDeflateConverter_h_
michael@0: #define _nsDeflateConverter_h_
michael@0: 
michael@0: #include "nsIStreamConverter.h"
michael@0: #include "nsCOMPtr.h"
michael@0: #include "nsIPipe.h"
michael@0: #include "zlib.h"
michael@0: #include "mozilla/Attributes.h"
michael@0: 
michael@0: #define DEFLATECONVERTER_CID { 0x461cd5dd, 0x73c6, 0x47a4, \
michael@0:            { 0x8c, 0xc3, 0x60, 0x3b, 0x37, 0xd8, 0x4a, 0x61 } }
michael@0: 
michael@0: #define ZIP_BUFLEN (4 * 1024 - 1)
michael@0: 
michael@0: class nsDeflateConverter MOZ_FINAL : public nsIStreamConverter
michael@0: {
michael@0: public:
michael@0:     NS_DECL_ISUPPORTS
michael@0:     NS_DECL_NSIREQUESTOBSERVER
michael@0:     NS_DECL_NSISTREAMLISTENER
michael@0:     NS_DECL_NSISTREAMCONVERTER
michael@0: 
michael@0:     nsDeflateConverter()
michael@0:     {
michael@0:         // 6 is Z_DEFAULT_COMPRESSION but we need the actual value
michael@0:         mLevel = 6;
michael@0:     }
michael@0: 
michael@0:     nsDeflateConverter(int32_t level)
michael@0:     {
michael@0:         mLevel = level;
michael@0:     }
michael@0: 
michael@0: private:
michael@0: 
michael@0:     ~nsDeflateConverter()
michael@0:     {
michael@0:     }
michael@0:     
michael@0:     enum WrapMode {
michael@0:         WRAP_ZLIB,
michael@0:         WRAP_GZIP,
michael@0:         WRAP_NONE
michael@0:     };
michael@0: 
michael@0:     WrapMode mWrapMode;
michael@0:     uint64_t mOffset;
michael@0:     int32_t mLevel;
michael@0:     nsCOMPtr<nsIStreamListener> mListener;
michael@0:     nsCOMPtr<nsISupports> mContext;
michael@0:     z_stream mZstream;
michael@0:     unsigned char mWriteBuffer[ZIP_BUFLEN];
michael@0: 
michael@0:     nsresult Init();
michael@0:     nsresult PushAvailableData(nsIRequest *aRequest, nsISupports *aContext);
michael@0: };
michael@0: 
michael@0: #endif