private static DieRoll parseDiceInner(StringStream ss) {
/*
* if(checkAndEat("FA(")) { DieRoll d=parseFA(ss); if(d==null) return
* null; return parseDTail(d,ss); }
*/
Integer num = ss.getInt();
int dsides;
int ndice;
if (num == null) {
ndice = 1;
} else {
ndice = num;
}
if (ss.checkAndEat("d")) {
num = ss.getInt();
if (num == null) return null;
dsides = num;
} else {
return null;
}
num = ss.readSgnInt();
int bonus;
if (num == null) bonus = 0;
else bonus = num;
return new DieRoll(ndice, dsides, bonus);
}
private static DieRoll parseDTail(DieRoll r1, StringStream ss) {
if (r1 == null) return null;
if (ss.checkAndEat("&")) {
DieRoll d2 = parseDice(ss);
return parseDTail(new DiceSum(r1, d2), ss);
} else {
return r1;
}
}
private static Vector<DieRoll> parseRollInner(StringStream ss, Vector<DieRoll> v) {
Vector<DieRoll> r = parseXDice(ss);
if (r == null) {
return null;
}
v.addAll(r);
if (ss.checkAndEat(";")) {
return parseRollInner(ss, v);
}
return v;
}
private static Vector<DieRoll> parseXDice(StringStream ss) {
StringStream saved = ss.save();
Integer x = ss.getInt();
int num;
if (x == null) {
num = 1;
} else {
if (ss.checkAndEat("x")) {
num = x;
} else {
num = 1;
ss.restore(saved);
}
}
DieRoll dr = parseDice(ss);
if (dr == null) {
return null;
}
Vector<DieRoll> ans = new Vector<DieRoll>();
for (int i = 0; i < num; i++) {
ans.add(dr);
}
return ans;
}
/**
* roll::= ndice ; roll | ndice xdice::= dice | N X dice dice::= die bonus? dtail XXXX|
* FA(die,bonus,N) dtail dtail::= & dice | <nothing> die::= (N)? dN bonus::= + N | -N
*/
public static Vector<DieRoll> parseRoll(String s) {
StringStream ss = new StringStream(s.toLowerCase());
Vector<DieRoll> v = parseRollInner(ss, new Vector<DieRoll>());
if (ss.isEmpty()) return v;
return null;
}