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v1_9_3_392 - Show latest stable - 0 notes - Class: Bignum

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<<(p1) public

Shifts big left numeric positions (right if numeric is negative).

VALUE
rb_big_lshift(VALUE x, VALUE y)
{
    long shift;
    int neg = 0;

    for (;;) {
        if (FIXNUM_P(y)) {
            shift = FIX2LONG(y);
            if (shift < 0) {
                neg = 1;
                shift = -shift;
            }
            break;
        }
        else if (TYPE(y) == T_BIGNUM) {
            if (!RBIGNUM_SIGN(y)) {
                VALUE t = check_shiftdown(y, x);
                if (!NIL_P(t)) return t;
                neg = 1;
            }
            shift = big2ulong(y, "long", TRUE);
            break;
        }
        y = rb_to_int(y);
    }

    x = neg ? big_rshift(x, shift) : big_lshift(x, shift);
    return bignorm(x);
}

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