dll/shellext/zipfldr/CZipEnumerator.hpp

   1 /*
   2  * PROJECT:     ReactOS Zip Shell Extension
   3  * LICENSE:     GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
   4  * PURPOSE:     CZipEnumerator
   5  * COPYRIGHT:   Copyright 2017 Mark Jansen (mark.jansen@reactos.org)
   6  */
   7
   8 struct CZipEnumerator
   9 {
  10 private:
  11     CComPtr<IZip> m_Zip;
  12     bool m_First;
  13     CAtlList<CStringA> m_Returned;
  14 public:
  15     CZipEnumerator()
  16         :m_First(true)
  17     {
  18     }
  19
  20     bool initialize(IZip* zip)
  21     {
  22         m_Zip = zip;
  23         return reset();
  24     }
  25
  26     bool reset()
  27     {
  28         unzFile uf = m_Zip->getZip();
  29         m_First = true;
  30         if (unzGoToFirstFile(uf) != UNZ_OK)
  31             return false;
  32         m_Returned.RemoveAll();
  33         return true;
  34     }
  35
  36     bool next_unique(const char* prefix, CStringA& name, bool& folder, unz_file_info64& info)
  37     {
  38         size_t len = strlen(prefix);
  39         CStringA tmp;
  40         while (next(tmp, info))
  41         {
  42             if (!_strnicmp(tmp, prefix, len))
  43             {
  44                 int pos = tmp.Find('/', len);
  45                 if (pos < 0)
  46                 {
  47                     name = tmp.Mid(len);
  48                     folder = false;
  49                 }
  50                 else
  51                 {
  52                     name = tmp.Mid(len, pos - len);
  53                     folder = true;
  54                 }
  55                 tmp = name.MakeLower();
  56
  57                 POSITION it = m_Returned.Find(tmp);
  58                 if (!name.IsEmpty() && !it)
  59                 {
  60                     m_Returned.AddTail(tmp);
  61                     return true;
  62                 }
  63             }
  64         }
  65         return false;
  66     }
  67
  68     bool next(CStringA& name, unz_file_info64& info)
  69     {
  70         int err;
  71
  72         unzFile uf = m_Zip->getZip();
  73         if (!m_First)
  74         {
  75             err = unzGoToNextFile(uf);
  76             if (err == UNZ_END_OF_LIST_OF_FILE)
  77             {
  78                 return false;
  79             }
  80         }
  81         m_First = false;
  82
  83         err = unzGetCurrentFileInfo64(uf, &info, NULL, 0, NULL, 0, NULL, 0);
  84         if (err == UNZ_OK)
  85         {
  86             PSTR buf = name.GetBuffer(info.size_filename);
  87             err = unzGetCurrentFileInfo64(uf, NULL, buf, name.GetAllocLength(), NULL, 0, NULL, 0);
  88             name.ReleaseBuffer(info.size_filename);
  89             name.Replace('\\', '/');
  90         }
  91         return err == UNZ_OK;
  92     }
  93 };
  94