mirror of
https://github.com/Xahau/xahaud.git
synced 2025-11-10 13:45:49 +00:00
47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
//------------------------------------------------------------------------------
|
|
/*
|
|
This file is part of rippled: https://github.com/ripple/rippled
|
|
Copyright (c) 2012-2015 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/contract.h>
|
|
#include <ripple/basics/mulDiv.h>
|
|
#include <boost/multiprecision/cpp_int.hpp>
|
|
#include <limits>
|
|
#include <utility>
|
|
|
|
namespace ripple {
|
|
|
|
std::pair<bool, std::uint64_t>
|
|
mulDiv(std::uint64_t value, std::uint64_t mul, std::uint64_t div)
|
|
{
|
|
using namespace boost::multiprecision;
|
|
|
|
boost::multiprecision::uint128_t result;
|
|
result = multiply(result, value, mul);
|
|
|
|
result /= div;
|
|
|
|
auto constexpr limit = std::numeric_limits<std::uint64_t>::max();
|
|
|
|
if (result > limit)
|
|
return {false, limit};
|
|
|
|
return {true, static_cast<std::uint64_t>(result)};
|
|
}
|
|
|
|
} // namespace ripple
|