/**
* 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 and interprets the next token from the input stream.
*
* @return true if the document scanning has been completed
* @throws IOException I/O exception
*/
boolean more() throws IOException {
// gets next character from the input stream
token.reset();
final int ch = consume();
if (ch == 0) {
type = Type.EOF;
return false;
}
// checks the scanner state
switch (state) {
case CONTENT:
scanCONTENT(ch);
break;
case TAG:
case ATT:
scanTAG(ch);
break;
case QUOTE:
scanATTVALUE(ch);
}
return true;
}
/**
* Adds the error message to the message buffer {@link #info}.
*
* @param msg error message
* @param ext error extension
* @return {@code false}
*/
protected final boolean error(final String msg, final Object... ext) {
info.reset();
info.addExt(msg == null ? "" : msg, ext);
return false;
}