void set3(int newPrice, int optCur, int back2, int len2, int back) {
        price = newPrice;
        optPrev = optCur + len2 + 1;
        backPrev = back;
        prev1IsLiteral = true;
        hasPrev2 = true;
        optPrev2 = optCur;
        backPrev2 = back2;
    }
void set3 ( int newPrice , int optCur , int back2 , int len2 , int back ) { price = newPrice ; optPrev = optCur + len2 + 1 ; backPrev = back ; prev1IsLiteral = true ; hasPrev2 = true ; optPrev2 = optCur ; backPrev2 = back2 ; }
Sets to indicate three LZMA symbols of which the second one
is a literal.