const char* LLURL::updateRelativePath(const LLURL &url) {
  char new_path[LL_MAX_PATH];
  char tmp_path[LL_MAX_PATH];

  char *parse;

  if (mPath[0] != '/') {
    //start with existing path
    strncpy(new_path,url.mPath, LL_MAX_PATH -1);        /* (0, LL_MAX_PATH - 1) */
    new_path[LL_MAX_PATH -1] = '\0';                    /* (LL_MAX_PATH - 1, 1) */
    strncpy(tmp_path,mPath, LL_MAX_PATH -1);            /* (0, LL_MAX_PATH - 1) */
    tmp_path[LL_MAX_PATH -1] = '\0';                    /* (LL_MAX_PATH - 1, 1) */

    parse = strtok(tmp_path,"/");
    while (parse)
      {
        if (!strcmp(parse,"."))
          {
            // skip this, it's meaningless
          }
        else if (!strcmp(parse,".."))
          {
            if ((parse = strrchr(new_path, '/')))
              {
                *parse = '\0';
                if ((parse = strrchr(new_path, '/')))
                  {
                    *(parse+1) = '\0';
                  }
                else
                  {
                    new_path[0] = '\0';
                  }
              }
            else
              {
                strcat(new_path,"../");                 
              }

          }
        else
          {
            strncat(new_path,parse,                     
                    LL_MAX_PATH - strlen(new_path) -1 );
            strcat(new_path,"/");                       
          }
        parse = strtok(NULL,"/");
      }
    strncpy(mPath,new_path, LL_MAX_PATH -1);            
    mPath[LL_MAX_PATH -1] = '\0';
  }
  return mPath;
}