Windows SDK File System: How to count files within a directory and subdirectories?
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    Windows SDK File System: How to count files within a directory and subdirectories?

    Q: How to count files within a directory and subdirectories?

    A:

    Code:
    #include <string>
    #include <iostream>
    
    #include <windows.h>
    #include <conio.h>
    
    
    int CountFiles(const std::string &refcstrRootDirectory,
                   const std::string &refcstrExtension,
                   bool              bSubdirectories = true)
    {
      int             iCount          = 0;
      std::string     strFilePath;          // Filepath
      std::string     strPattern;           // Pattern
      std::string     strExtension;         // Extension
      HANDLE          hFile;                // Handle to file
      WIN32_FIND_DATA FileInformation;      // File information
    
    
      strPattern = refcstrRootDirectory + "\\*.*";
      hFile = ::FindFirstFile(strPattern.c_str(), &FileInformation);
      if(hFile != INVALID_HANDLE_VALUE)
      {
        do
        {
          if(FileInformation.cFileName[0] != '.')
          {
            strFilePath.erase();
            strFilePath = refcstrRootDirectory +
                          "\\" +
                          FileInformation.cFileName;
    
            if(FileInformation.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
            {
              if(bSubdirectories)
              {
                // Search subdirectory
                int iRC = CountFiles(strFilePath,
                                     refcstrExtension,
                                     bSubdirectories);
                if(iRC != -1)
                  iCount += iRC;
                else
                  return -1;
              }
            }
            else
            {
              // Check extension
              strExtension = FileInformation.cFileName;
              strExtension = strExtension.substr(strExtension.rfind(".") + 1);
    
              if((refcstrExtension == "*") ||
                 (strExtension == refcstrExtension))
              {
                // Increase counter
                ++iCount;
              }
            }
          }
        } while(::FindNextFile(hFile, &FileInformation) == TRUE);
    
        // Close handle
        ::FindClose(hFile);
      }
    
      return iCount;
    }
    
    
    int main()
    {
      int iNumberOfFiles = 0;
    
    
      // Count all files in 'c:' and its subdirectories
      iNumberOfFiles = CountFiles("c:", "*");
      if(iNumberOfFiles == -1)
      {
        std::cout << "Error " << std::endl;
        return -1;
      }
    
      // Print results
      std::cout << "Number of files = " << iNumberOfFiles << std::endl;
    
      // Count '.avi' files in 'c:'
      iNumberOfFiles = CountFiles("c:", "avi", false);
      if(iNumberOfFiles == -1)
      {
        std::cout << "Error " << std::endl;
        return -1;
      }
    
      // Print results
      std::cout << "Number of files = " << iNumberOfFiles << std::endl;
    
      // Wait for keystroke
      _getch();
    
      return 0;
    }
    Last edited by Andreas Masur; July 24th, 2005 at 05:14 PM.

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