mirror of
https://github.com/Xahau/xahaud.git
synced 2025-12-06 17:27:52 +00:00
63 lines
2.4 KiB
C++
63 lines
2.4 KiB
C++
//------------------------------------------------------------------------------
|
|
/*
|
|
This file is part of rippled: https://github.com/ripple/rippled
|
|
Copyright (c) 2012-2016 Ripple Labs Inc.
|
|
|
|
Permission to use, copy, modify, and/or distribute this software for any
|
|
purpose with or without fee is hereby granted, provided that the above
|
|
copyright notice and this permission notice appear in all copies.
|
|
|
|
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
ANY SPECIAL , DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
//==============================================================================
|
|
|
|
#include <ripple/basics/mulDiv.h>
|
|
#include <ripple/beast/unit_test.h>
|
|
|
|
namespace ripple {
|
|
namespace test {
|
|
|
|
struct mulDiv_test : beast::unit_test::suite
|
|
{
|
|
void
|
|
run() override
|
|
{
|
|
const auto max = std::numeric_limits<std::uint64_t>::max();
|
|
const std::uint64_t max32 = std::numeric_limits<std::uint32_t>::max();
|
|
|
|
auto result = mulDiv(85, 20, 5);
|
|
BEAST_EXPECT(result.first && result.second == 340);
|
|
result = mulDiv(20, 85, 5);
|
|
BEAST_EXPECT(result.first && result.second == 340);
|
|
|
|
result = mulDiv(0, max - 1, max - 3);
|
|
BEAST_EXPECT(result.first && result.second == 0);
|
|
result = mulDiv(max - 1, 0, max - 3);
|
|
BEAST_EXPECT(result.first && result.second == 0);
|
|
|
|
result = mulDiv(max, 2, max / 2);
|
|
BEAST_EXPECT(result.first && result.second == 4);
|
|
result = mulDiv(max, 1000, max / 1000);
|
|
BEAST_EXPECT(result.first && result.second == 1000000);
|
|
result = mulDiv(max, 1000, max / 1001);
|
|
BEAST_EXPECT(result.first && result.second == 1001000);
|
|
result = mulDiv(max32 + 1, max32 + 1, 5);
|
|
BEAST_EXPECT(result.first && result.second == 3689348814741910323);
|
|
|
|
// Overflow
|
|
result = mulDiv(max - 1, max - 2, 5);
|
|
BEAST_EXPECT(!result.first && result.second == max);
|
|
}
|
|
};
|
|
|
|
BEAST_DEFINE_TESTSUITE(mulDiv, ripple_basics, ripple);
|
|
|
|
} // namespace test
|
|
} // namespace ripple
|