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Step 1: Convert Number to use 128-bit numbers internally

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- Update the conversion points between Number and *Amount & STNumber.
- Tests probably don't pass.
This commit is contained in:
Ed Hennis
2025-11-12 00:26:13 -05:00
parent 33309480d4
commit d030fdaa2b
18 changed files with 419 additions and 88 deletions
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37
src/test/basics/Number_test.cpp
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@@ -2,6 +2,7 @@
#include <xrpl/beast/unit_test.h>
#include <xrpl/protocol/IOUAmount.h>
#include <xrpl/protocol/STAmount.h>
#include <xrpl/protocol/SystemParameters.h>
#include <sstream>
#include <tuple>
@@ -685,19 +686,19 @@ public:
Issue const issue;
Number const n{7'518'783'80596, -5};
saveNumberRoundMode const save{Number::setround(Number::to_nearest)};
auto res2 = STAmount{issue, n.mantissa(), n.exponent()};
auto res2 = STAmount{issue, n};
BEAST_EXPECT(res2 == STAmount{7518784});
Number::setround(Number::towards_zero);
res2 = STAmount{issue, n.mantissa(), n.exponent()};
res2 = STAmount{issue, n};
BEAST_EXPECT(res2 == STAmount{7518783});
Number::setround(Number::downward);
res2 = STAmount{issue, n.mantissa(), n.exponent()};
res2 = STAmount{issue, n};
BEAST_EXPECT(res2 == STAmount{7518783});
Number::setround(Number::upward);
res2 = STAmount{issue, n.mantissa(), n.exponent()};
res2 = STAmount{issue, n};
BEAST_EXPECT(res2 == STAmount{7518784});
}
@@ -725,6 +726,33 @@ public:
BEAST_EXPECT(Number(-100, -30000).truncate() == Number(0, 0));
}
void
testInt64()
{
testcase("std::int64_t");
// Control case
BEAST_EXPECT(Number::maxMantissa() > 10);
Number ten{10};
BEAST_EXPECT(ten.exponent() <= 0);
BEAST_EXPECT(
std::numeric_limits<std::int64_t>::max() > INITIAL_XRP.drops());
BEAST_EXPECT(Number::maxMantissa() > INITIAL_XRP.drops());
Number initalXrp{INITIAL_XRP};
BEAST_EXPECT(initalXrp.exponent() <= 0);
Number maxInt64{std::numeric_limits<std::int64_t>::max()};
BEAST_EXPECT(maxInt64.exponent() <= 0);
using namespace boost::multiprecision;
// maxint64 9,223,372,036,854,775,808
int128_t minMantissa{1'000'000'000'000'000'000LL};
int128_t maxMantissa{minMantissa * 10 - 1};
BEAST_EXPECT(minMantissa < std::numeric_limits<std::int64_t>::max());
BEAST_EXPECT(maxMantissa > std::numeric_limits<std::int64_t>::max());
}
void
run() override
{
@@ -746,6 +774,7 @@ public:
test_inc_dec();
test_toSTAmount();
test_truncate();
testInt64();
}
};