Multithreaded Zip Search

• Download source files - 156 Kb
• Download demo project - 32.5 Kb

Introduction

This is a small dialog based multithreaded app which helps us to search inside ZIP archives. It uses the CZipArchive class to open and process ZIP archives.

Background

This app uses CZipArchive class, for more about this CZipArchive information follow the link

• http://www.codeproject.com/cpp/zip.asp?target=ziparchive[^]

void CZipSearchDlg::EnumerateDirectory(CString Directory)
{
  int nCount,i;
  CString strFilename;
  BOOL bResult;
  CFileFind ZIPFiles;
  CZipArchive ZIPFile;
  CZipFileHeader ZIPFileHeader;
  CLike CompareLike;
  CString strStatus;
  BOOL bDisplayStatus=TRUE;
  SHFILEINFO    sfi;

  LV_ITEM lvItem;struct ItemFile *ifFile;

  Directory.TrimLeft();Directory.TrimRight();
  if(Directory.Right(1)=="\\")
    bResult=ZIPFiles.FindFile(Directory+"*.*");
  else
    bResult=ZIPFiles.FindFile(Directory+"\\"+"*.*");
  //Does the recursive search
  while(bResult && !m_bStopEnumeration && !m_bSkipDirectory)
  {
    if(bDisplayStatus)
    {
      strStatus.Format("Processing %s",Directory);
      m_wndStatusBar.SetText(strStatus,0,0);
      bDisplayStatus=TRUE;
    }
    bResult=ZIPFiles.FindNextFile();
    if(!ZIPFiles.IsDots())
      if(ZIPFiles.IsDirectory())
      {
        //Calls itself again
        EnumerateDirectory(ZIPFiles.GetFilePath());
        bDisplayStatus=TRUE;
      }
      else
      {
        strFilename=ZIPFiles.GetFileName();
        strFilename.MakeUpper();
        //Checks whether it is a ZIP file or not.
        if(strFilename.Right(3)=="ZIP")
        {
          try
          {
            ZIPFile.Open(ZIPFiles.GetFilePath());
            nCount=ZIPFile.GetNoEntries();
            if(nCount>50)
            {
              //Updates the statusbar
              strStatus.Format("Processing %s", ZIPFiles.GetFilePath());
              m_wndStatusBar.SetText(strStatus,0,0);
              m_wndProgressSearch.SetRange(0,nCount-1);
              m_wndProgressSearch.ShowWindow(SW_SHOW);
            }
            //Searches inside ZIP file
            for(i=0; i<nCount && !m_bStopEnumeration &&
                !m_bSkipDirectory && !m_bSkipFile;i++)
            {
              if(nCount>10)
                m_wndProgressSearch.SetPos(i);
              ZIPFile.GetFileInfo(ZIPFileHeader,(WORD)i);
              if(CompareLike.IsLike(ZIPFileHeader.GetFileName(), 
                m_strFilename))
              {
                SHGetFileInfo(ZIPFileHeader.GetFileName(),
                  0,&sfi,sizeof(SHFILEINFO),
                  SHGFI_USEFILEATTRIBUTES|SHGFI_SYSICONINDEX|
                  SHGFI_TYPENAME|
                  (m_lvResult.GetStyle()&
                     LVS_ICON?SHGFI_LARGEICON:SHGFI_SMALLICON));

                ifFile=new ItemFile;
                ifFile->strFilename=ZIPFileHeader.GetFileName();
                ifFile->strType=sfi.szTypeName;
                if(ifFile->strType.IsEmpty())
                if(ifFile->strFilename.ReverseFind('.')>0)
                {
                  ifFile->strType=ifFile->strFilename.Right((
                    ifFile->strFilename.GetLength() -
                    ifFile->strFilename.ReverseFind('.'))-1);
                  ifFile->strType.MakeUpper();
                  ifFile->strType+=" File";
                }
                else
                  ifFile->strType="Unknown";
                // If it satisfies the search criteria then obtain the file 
                // information and it's associated icon
                ifFile->strSize.Format("%u KB",
                  (ZIPFileHeader.m_uUncomprSize/1024)?
                  (ZIPFileHeader.m_uUncomprSize/1024):1);
                ifFile->strZIPFilename=ZIPFiles.GetFileName();
                ifFile->strPath=ZIPFiles.GetRoot();
                                
                lvItem.mask=LVIF_TEXT|LVIF_IMAGE|LVIF_PARAM;
                lvItem.iItem=m_lvResult.GetItemCount();
                lvItem.iSubItem=0;
                lvItem.iImage=sfi.iIcon;
                lvItem.pszText=(LPSTR)ifFile->strFilename.operator LPCTSTR();
                lvItem.lParam=(LPARAM)ifFile;
                m_lvResult.InsertItem(&lvItem);
                                
                }
              }
              if(nCount>10)
              {
                m_wndProgressSearch.ShowWindow(SW_HIDE);
                bDisplayStatus=TRUE;
              }
              m_bSkipFile=FALSE;
              ZIPFile.Close();                    
            }
            catch(...)
            {
              if(!ZIPFile.IsClosed())
                ZIPFile.Close();
            }
          }    
       }
    }
  m_bSkipDirectory=FALSE;
  ZIPFiles.Close();
}

Points of Interest

Yes, I learned how to write a multithreaded app and how to process ZIP archives.

History

• ZipSearch Version 1.0 – First Release

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The ZipSearch_src.zip is invalid !!! virusss 22:40 10 Dec '06   The ZipSearch_src.zip is invalid !!! Sign In·View Thread·PermaLink Thread discussion? DavidCrow 3:39 2 Oct '03   You've shown the code that handles the ZIP files, but have no mention of where the multiple threads come into play. Five birds are sitting on a fence. Three of them decide to fly off. How many are left? Sign In·View Thread·PermaLink 1.00/5 (1 vote) delete Anonymous 15:12 30 Sep '03   Is it managed code? Where is delete for ifFile? Regards Sign In·View Thread·PermaLink delete Anonymous 15:12 30 Sep '03   Is it manage code? Where is delete for ifFile? Regards Sign In·View Thread·PermaLink Download size Hans Dietrich 2:47 28 Sep '03   The source download size is 165KB, not 33KB. You could reduce the download size by not including unnecessary project files like .aps, .clw, .opt, .plg (the only two project files that are necessary are .dsp and .dsw). Best wishes, Hans Sign In·View Thread·PermaLink Re: Download size Antony M Kancidrowski 6:40 30 Sep '03   You don't need the .dsw file either as it will be regenerated when you load the .dsp. Ant. Sign In·View Thread·PermaLink Could you fix the horizontal scrolling annoyance? WREY 1:09 28 Sep '03   The reader shouldn't have to use a horizontal scrollbar in order to read your article. Could you modify the settings so that a HSB does not show up? William Fortes in fide et opere! Sign In·View Thread·PermaLink Re: Could you fix the horizontal scrolling annoyance? Uwe Keim 2:35 28 Sep '03   Yes; he really should do! -- - Free Windows-based CMS: www.zeta-software.de/enu/producer/freeware/download.html - See me: www.magerquark.de Sign In·View Thread·PermaLink Re: Could you fix the horizontal scrolling annoyance? Marc Clifton 4:14 28 Sep '03   WREY wrote: Could you modify the settings so that a HSB does not show up? Is that better? Marc Latest AAL Article My blog Join my forum! Sign In·View Thread·PermaLink

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