int c = in.read();
if (c != '\\") return c;
backslashParity *= -1;
// If there are an even number of backslashes,
// this is not a Unicode escape
if (backslashParity == 1) return c;
// Mark is supported because I used
// a BufferedReader in the constructor
in.mark(1);
int next = in.read();
if (next != 'u" ) { // This is not a Unicode escape
in.reset();
return c;
}
// read next 4 hex digits
// If the next four chars do not make a valid hex digit
// this is not a valid .java file and you need
// a compiler error
StringBuffer sb = new StringBuffer();
sb.append((char) in.read());
sb.append((char) in.read());
sb.append((char) in.read());
sb.append((char) in.read());
String hex = sb.toString();
try {
return Integer.valueOf(hex, 16).intValue();
}
catch (NumberFormatException e) {
throw new IOException("Bad Unicode escape");
}
