File indexing completed on 2024-04-21 07:39:13

 /* This file is part of the KDE libraries
    SPDX-FileCopyrightText: 2000, 2009 David Faure <faure@kde.org>
 
    SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #ifndef __kgzipfilter__h
 #define __kgzipfilter__h
 
 #include "kfilterbase.h"
 
 /**
  * Internal class used by KCompressionDevice
  *
  * This header is not installed.
  *
  * @internal
  */
 class KGzipFilter : public KFilterBase
 {
 public:
     KGzipFilter();
     ~KGzipFilter() override;
 
     bool init(int mode) override;
 
     // The top of zlib.h explains it: there are three cases.
     // - Raw deflate, no header (e.g. inside a ZIP file)
     // - Thin zlib header (1) (which is normally what HTTP calls "deflate" (2))
     // - Gzip header, implemented here by readHeader
     //
     // (1) as written out by compress()/compress2()
     // (2) see https://www.zlib.net/zlib_faq.html#faq39
     enum Flag {
         RawDeflate = 0, // raw deflate data
         ZlibHeader = 1, // zlib headers (HTTP deflate)
         GZipHeader = 2,
     };
     bool init(int mode, Flag flag); // for direct users of KGzipFilter
     int mode() const override;
     bool terminate() override;
     void reset() override;
     bool readHeader() override; // this is about the GZIP header
     bool writeHeader(const QByteArray &fileName) override;
     void writeFooter();
     void setOutBuffer(char *data, uint maxlen) override;
     void setInBuffer(const char *data, uint size) override;
     int inBufferAvailable() const override;
     int outBufferAvailable() const override;
     Result uncompress() override;
     Result compress(bool finish) override;
 
 private:
     Result uncompress_noop();
     class Private;
     Private *const d;
 };
 
 #endif