}
      if( ((c & 0xff) == 0xed) && ((z[i+1] & 0xe0) == 0xa0) ){
        /* Unicode character in the range U+D800 - U+DFFF are for
         * surrogate pairs, they shouldn't occur in filenames. */
        return 0;
      }
    }
    if( c=='\\' || c=='*' || c=='[' || c==']' || c=='?' ){
      return 0;
    }
    if( c=='/' ){
      if( z[i+1]=='/' ) return 0;
      if( z[i+1]=='.' ){
        if( z[i+2]=='/' || z[i+2]==0 ) return 0;
        if( z[i+2]=='.' && (z[i+3]=='/' || z[i+3]==0) ) return 0;