/**
* Scans surrogates and append them to the specified buffer.
*
* <p><strong>Note:</strong> This assumes the current char has already been identified as a high
* surrogate.
*
* @param buf The StringBuffer to append the read surrogates to.
* @return True if it succeeded.
*/
protected boolean scanSurrogates(XMLStringBuffer buf) throws IOException, XNIException {
int high = fEntityScanner.scanChar();
int low = fEntityScanner.peekChar();
if (!XMLChar.isLowSurrogate(low)) {
reportFatalError("InvalidCharInContent", new Object[] {Integer.toString(high, 16)});
return false;
}
fEntityScanner.scanChar();
// convert surrogates to supplemental character
int c = XMLChar.supplemental((char) high, (char) low);
// supplemental character must be a valid XML character
if (isInvalid(c)) {
reportFatalError("InvalidCharInContent", new Object[] {Integer.toString(c, 16)});
return false;
}
// fill in the buffer
buf.append((char) high);
buf.append((char) low);
return true;
} // scanSurrogates():boolean
