Amounts
BasicTaker::remaining_offer (STAmountCalcSwitchovers const& amountCalcSwitchovers) const
{
// If the taker is done, then there's no offer to place.
if (done ())
return Amounts (remaining_.in.zeroed(), remaining_.out.zeroed());
// Avoid math altogether if we didn't cross.
if (original_ == remaining_)
return original_;
if (sell_)
{
assert (remaining_.in > zero);
// We scale the output based on the remaining input:
return Amounts (remaining_.in, divRound (
remaining_.in, quality_.rate (), issue_out_, true,
amountCalcSwitchovers));
}
assert (remaining_.out > zero);
// We scale the input based on the remaining output:
return Amounts (mulRound (
remaining_.out, quality_.rate (), issue_in_, true, amountCalcSwitchovers),
remaining_.out);
}
Amounts
Taker::remaining_offer () const
{
// If the taker is done, then there's no offer to place.
if (done ())
return Amounts (m_amount.in.zeroed(), m_amount.out.zeroed());
// Avoid math altogether if we didn't cross.
if (m_amount == m_remain)
return m_amount;
if (m_options.sell)
{
assert (m_remain.in > zero);
// We scale the output based on the remaining input:
return Amounts (m_remain.in, divRound (
m_remain.in, m_quality.rate (), m_remain.out.issue (), true));
}
assert (m_remain.out > zero);
// We scale the input based on the remaining output:
return Amounts (mulRound (
m_remain.out, m_quality.rate (), m_remain.in.issue (), true), m_remain.out);
}
Amounts
cross (Amounts offer, Quality quality)
{
if (reject (quality))
return Amounts (offer.in.zeroed (), offer.out.zeroed ());
// we need to emulate "unfunded offers" behavior
if (get_funds (AccountID (0x4702), offer.out) == beast::zero)
return Amounts (offer.in.zeroed (), offer.out.zeroed ());
if (done ())
return Amounts (offer.in.zeroed (), offer.out.zeroed ());
auto result = do_cross (offer, quality, AccountID (0x4702));
funds_ -= result.order.in;
return result.order;
}
void
test_operations ()
{
testcase ("operations");
Quality const q11 (Amounts (
STAmount (noIssue(), 731),
STAmount (noIssue(), 731)));
Quality qa (q11);
Quality qb (q11);
BEAST_EXPECT(qa == qb);
BEAST_EXPECT(++qa != q11);
BEAST_EXPECT(qa != qb);
BEAST_EXPECT(--qb != q11);
BEAST_EXPECT(qa != qb);
BEAST_EXPECT(qb < qa);
BEAST_EXPECT(qb++ < qa);
BEAST_EXPECT(qb++ < qa);
BEAST_EXPECT(qb++ == qa);
BEAST_EXPECT(qa < qb);
}
void
test_ceil_in ()
{
testcase ("ceil_in");
{
// 1 in, 1 out:
Quality q (Amounts (amount(1), amount(1)));
ceil_in (q,
1, 1, // 1 in, 1 out
1, // limit: 1
1, 1); // 1 in, 1 out
ceil_in (q,
10, 10, // 10 in, 10 out
5, // limit: 5
5, 5); // 5 in, 5 out
ceil_in (q,
5, 5, // 5 in, 5 out
10, // limit: 10
5, 5); // 5 in, 5 out
}
{
// 1 in, 2 out:
Quality q (Amounts (amount(1), amount(2)));
ceil_in (q,
40, 80, // 40 in, 80 out
40, // limit: 40
40, 80); // 40 in, 20 out
ceil_in (q,
40, 80, // 40 in, 80 out
20, // limit: 20
20, 40); // 20 in, 40 out
ceil_in (q,
40, 80, // 40 in, 80 out
60, // limit: 60
40, 80); // 40 in, 80 out
}
{
// 2 in, 1 out:
Quality q (Amounts (amount(2), amount(1)));
ceil_in (q,
40, 20, // 40 in, 20 out
20, // limit: 20
20, 10); // 20 in, 10 out
ceil_in (q,
40, 20, // 40 in, 20 out
40, // limit: 40
40, 20); // 40 in, 20 out
ceil_in (q,
40, 20, // 40 in, 20 out
50, // limit: 40
40, 20); // 40 in, 20 out
}
}
static
Amounts
amounts (In in, Out out)
{
return Amounts (amount(in), amount(out));
}
void
test_ceil_out ()
{
testcase ("ceil_out");
{
// 1 in, 1 out:
Quality q (Amounts (amount(1),amount(1)));
ceil_out (q,
1, 1, // 1 in, 1 out
1, // limit 1
1, 1); // 1 in, 1 out
ceil_out (q,
10, 10, // 10 in, 10 out
5, // limit 5
5, 5); // 5 in, 5 out
ceil_out (q,
10, 10, // 10 in, 10 out
20, // limit 20
10, 10); // 10 in, 10 out
}
{
// 1 in, 2 out:
Quality q (Amounts (amount(1),amount(2)));
ceil_out (q,
40, 80, // 40 in, 80 out
40, // limit 40
20, 40); // 20 in, 40 out
ceil_out (q,
40, 80, // 40 in, 80 out
80, // limit 80
40, 80); // 40 in, 80 out
ceil_out (q,
40, 80, // 40 in, 80 out
100, // limit 100
40, 80); // 40 in, 80 out
}
{
// 2 in, 1 out:
Quality q (Amounts (amount(2),amount(1)));
ceil_out (q,
40, 20, // 40 in, 20 out
20, // limit 20
40, 20); // 40 in, 20 out
ceil_out (q,
40, 20, // 40 in, 20 out
40, // limit 40
40, 20); // 40 in, 20 out
ceil_out (q,
40, 20, // 40 in, 20 out
10, // limit 10
20, 10); // 20 in, 10 out
}
}
