/** * 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; }
/** * 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; }
/** * 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; } } }