Searching files in C on Windows

How would one search for files on a computer? Maybe looking for certain extensions.

I need to iterate through all the files and examine file names.

Say I wanted to find all files with an .code extension.

From stackoverflow

• Use FindFirstFile()/FindNextFile() functions and a recursive algorithm to traverse subfolders.

• For Windows, you would want to look into the FindFirstFile() and FindNextFile() functions. If you want to implement a recursive search, you can use GetFileAttributes() to check for FILE_ATTRIBUTE_DIRECTORY. If the file is actually a directory, continue into it with your search.

  Rob Kennedy : FindFirst/NextFile will already tell you the attributes of the file; not need to call GetFileAttributes.

• FindFirstFile()/ FindNextFile() will do the job in finding the list of files in the directory. To do recursive search through the sub-directories you might use _splitpath

  to split the path, into directory and filenames, and then use the resulting directory detail to do a recursive directory search.

• A nice wrapper for FindFirstFile is dirent.h for windows (google dirent.h Toni Ronkko)

  
  #define S_ISREG(B) ((B)&_S_IFREG)
  #define S_ISDIR(B) ((B)&_S_IFDIR)
  
  static void
  scan_dir(DirScan *d, const char *adir, BOOL recurse_dir)
  {
      DIR *dirfile;
      int adir_len = strlen(adir);
  
      if ((dirfile = opendir(adir)) != NULL) {
       struct dirent *entry;
       char path[MAX_PATH + 1];
       char *file;
  
       while ((entry = readdir(dirfile)) != NULL)
          { 
              struct stat buf;
        if(!strcmp(".",entry->d_name) || !strcmp("..",entry->d_name))
                  continue;
  
              sprintf(path,"%s/%.*s", adir, MAX_PATH-2-adir_len, entry->d_name);
  
              if (stat(path,&buf) != 0)
                  continue;
  
              file = entry->d_name;
              if (recurse_dir && S_ISDIR(buf.st_mode) )
                  scan_dir(d, path, recurse_dir);
              else if (match_extension(path) && _access(path, R_OK) == 0) // e.g. match .code
                  strs_find_add_str(&d->files,&d->n_files,_strdup(path));
       }
       closedir(dirfile);
      }
      return;
  }