Esempio n. 1
0
  /**
   * Scans a PEReference. [69]
   *
   * @return entity
   * @throws IOException I/O exception
   */
  private byte[] peRef() throws IOException {
    // scans predefined entities
    final byte[] name = name(true);
    consume(';');

    final byte[] en = pents.get(name);
    if (en != null) return en;
    return name;
  }
Esempio n. 2
0
  /**
   * Scans a reference. [67]
   *
   * @param f dissolve entities
   * @return entity
   * @throws IOException I/O exception
   */
  private byte[] ref(final boolean f) throws IOException {
    // scans numeric entities
    if (consume('#')) { // [66]
      final TokenBuilder ent = new TokenBuilder();
      int b = 10;
      int ch = nextChar();
      ent.add(ch);
      if (ch == 'x') {
        b = 16;
        ent.add(ch = nextChar());
      }
      int n = 0;
      do {
        final boolean m = ch >= '0' && ch <= '9';
        final boolean h = b == 16 && (ch >= 'a' && ch <= 'f' || ch >= 'A' && ch <= 'F');
        if (!m && !h) {
          completeRef(ent);
          return QUESTION;
        }
        n *= b;
        n += ch & 15;
        if (!m) n += 9;
        ent.add(ch = nextChar());
      } while (ch != ';');

      if (!valid(n)) return QUESTION;
      ent.reset();
      ent.add(n);
      return ent.finish();
    }

    // scans predefined entities [68]
    final byte[] name = name(false);
    if (!consume(';')) return QUESTION;

    if (!f) return concat(AMPER, name, SEMI);

    byte[] en = ents.get(name);
    if (en == null) {
      // unknown entity: try HTML entities (lazy initialization)
      if (HTMLENTS.size() == 0) {
        for (int s = 0; s < HTMLENTITIES.length; s += 2) {
          HTMLENTS.add(token(HTMLENTITIES[s]), token(HTMLENTITIES[s + 1]));
        }
      }
      en = HTMLENTS.get(name);
    }
    return en == null ? QUESTION : en;
  }
Esempio n. 3
0
 /**
  * Reads next character or throws an exception if all bytes have been read.
  *
  * @return next character
  * @throws IOException I/O exception
  */
 private int consume() throws IOException {
   while (true) {
     final int ch = input.read();
     if (ch == -1) return 0;
     if (ch == '%' && pe) { // [69]
       final byte[] key = name(true);
       final byte[] val = pents.get(key);
       if (val == null) error(UNKNOWNPE, key);
       check(';');
       input.add(val, true);
     } else {
       return ch;
     }
   }
 }