Fossil

         */
        return 0;
      }
      if( (c & 0xf0) == 0xe0 ) {
        /* This is a 3-byte UTF-8 character */
        if ( (c & 0xfe) == 0xee ){
          /* Range U+E000 - U+FFFF (Starting with 0xee or 0xef in UTF-8 ) */
          if ( (c & 1) && ((z[i+1] & 0xff) >= 0xa4) ){
            /* But exclude U+F900 - U+FFFF (0xef followed by byte >= 0xa4),
             * which contain valid characters. */
            continue;
          }
          /* Unicode character in the range U+E000 - U+F8FF are for
           * private use, they shouldn't occur in filenames.  */
          return 0;

        }
        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=='\\' ){
      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;