xbmc/filesystem/ZipFile.h

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #pragma once
  10
  11 #include "File.h"
  12 #include "IFile.h"
  13 #include "ZipManager.h"
  14
  15 #include <zlib.h>
  16
  17 namespace XFILE
  18 {
  19   class CZipFile : public IFile
  20   {
  21   public:
  22     CZipFile();
  23     ~CZipFile() override;
  24
  25     int64_t GetPosition() override;
  26     int64_t GetLength() override;
  27     bool Open(const CURL& url) override;
  28     bool Exists(const CURL& url) override;
  29     int Stat(struct __stat64* buffer) override;
  30     int Stat(const CURL& url, struct __stat64* buffer) override;
  31     ssize_t Read(void* lpBuf, size_t uiBufSize) override;
  32     //virtual bool ReadString(char *szLine, int iLineLength);
  33     int64_t Seek(int64_t iFilePosition, int iWhence = SEEK_SET) override;
  34     void Close() override;
  35
  36     //NOTE: gzip doesn't work. use DecompressGzip() instead
  37     int UnpackFromMemory(std::string& strDest, const std::string& strInput, bool isGZ=false);
  38
  39     /*! Decompress gzip encoded buffer in-memory */
  40     static bool DecompressGzip(const std::string& in, std::string& out);
  41
  42   private:
  43     bool InitDecompress();
  44     bool FillBuffer();
  45     void DestroyBuffer(void* lpBuffer, int iBufSize);
  46     CFile mFile;
  47     SZipEntry mZipItem;
  48     int64_t m_iFilePos = 0; // position in _uncompressed_ data read
  49     int64_t m_iZipFilePos = 0; // position in _compressed_ data
  50     int m_iAvailBuffer = 0;
  51     z_stream m_ZStream;
  52     char m_szBuffer[65535];     // 64k buffer for compressed data
  53     char* m_szStringBuffer;
  54     char* m_szStartOfStringBuffer; // never allocated!
  55     size_t m_iDataInStringBuffer;
  56     int m_iRead;
  57     bool m_bFlush = false;
  58     bool m_bCached;
  59   };
  60 }
  61