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example001_mul_div.cpp
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example001_mul_div.cpp
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///////////////////////////////////////////////////////////////////
// Copyright Christopher Kormanyos 2018 - 2024. //
// Distributed under the Boost Software License, //
// Version 1.0. (See accompanying file LICENSE_1_0.txt //
// or copy at http://www.boost.org/LICENSE_1_0.txt) //
///////////////////////////////////////////////////////////////////
#include <examples/example_uintwide_t.h>
#include <math/wide_integer/uintwide_t.h>
#if (defined(__GNUC__) && defined(__AVR__) && (__GNUC__ < 10))
#define WIDE_INTEGER_EXAMPLE001_CONSTEXPR_OR_CONST const // NOLINT(cppcoreguidelines-macro-usage)
#define WIDE_INTEGER_EXAMPLE001_CONSTEXPR_IS_COMPILE_TIME_CONSTANT 0 // NOLINT(cppcoreguidelines-macro-usage)
#else
#define WIDE_INTEGER_EXAMPLE001_CONSTEXPR_OR_CONST constexpr // NOLINT(cppcoreguidelines-macro-usage)
#define WIDE_INTEGER_EXAMPLE001_CONSTEXPR_IS_COMPILE_TIME_CONSTANT 1 // NOLINT(cppcoreguidelines-macro-usage)
#endif
#if defined(WIDE_INTEGER_NAMESPACE)
auto WIDE_INTEGER_NAMESPACE::math::wide_integer::example001_mul_div() -> bool
#else
auto ::math::wide_integer::example001_mul_div() -> bool
#endif
{
#if defined(WIDE_INTEGER_NAMESPACE)
using WIDE_INTEGER_NAMESPACE::math::wide_integer::uint256_t;
using WIDE_INTEGER_NAMESPACE::math::wide_integer::uint512_t;
#else
using ::math::wide_integer::uint256_t;
using ::math::wide_integer::uint512_t;
#endif
static_assert(( std::numeric_limits<uint256_t>::digits == static_cast<int>(INT16_C(256))
&& std::numeric_limits<uint512_t>::digits == static_cast<int>(INT16_C(512))),
"Error: Incorrect digit count for this example");
WIDE_INTEGER_EXAMPLE001_CONSTEXPR_OR_CONST uint256_t a("0xF4DF741DE58BCB2F37F18372026EF9CBCFC456CB80AF54D53BDEED78410065DE");
WIDE_INTEGER_EXAMPLE001_CONSTEXPR_OR_CONST uint256_t b("0x166D63E0202B3D90ECCEAA046341AB504658F55B974A7FD63733ECF89DD0DF75");
WIDE_INTEGER_EXAMPLE001_CONSTEXPR_OR_CONST auto c = uint512_t(a) * uint512_t(b);
WIDE_INTEGER_EXAMPLE001_CONSTEXPR_OR_CONST auto d = (a / b);
WIDE_INTEGER_EXAMPLE001_CONSTEXPR_OR_CONST auto result_is_ok =
(
(c == "0x1573D6A7CEA734D99865C4F428184983CDB018B80E9CC44B83C773FBE11993E7E491A360C57EB4306C61F9A04F7F7D99BE3676AAD2D71C5592D5AE70F84AF076")
&& (static_cast<std::uint_fast8_t>(d) == static_cast<std::uint_fast8_t>(UINT8_C(10)))
);
#if (defined(WIDE_INTEGER_EXAMPLE001_CONSTEXPR_IS_COMPILE_TIME_CONSTANT) \
&& (WIDE_INTEGER_EXAMPLE001_CONSTEXPR_IS_COMPILE_TIME_CONSTANT == 1))
static_assert(result_is_ok, "Error: example001_mul_div not OK!");
#endif
return result_is_ok;
}
// Enable this if you would like to activate this main() as a standalone example.
#if defined(WIDE_INTEGER_STANDALONE_EXAMPLE001_MUL_DIV)
#if !defined(WIDE_INTEGER_DISABLE_IOSTREAM)
#include <iomanip>
#include <iostream>
#endif
constexpr auto example_standalone_foodcafe = static_cast<std::uint32_t>(UINT32_C(0xF00DCAFE));
extern "C"
{
extern volatile std::uint32_t example_standalone_result;
auto example_run_standalone (void) -> bool;
auto example_get_standalone_result(void) -> bool;
auto example_run_standalone(void) -> bool
{
bool result_is_ok = true;
for(unsigned i = 0U; i < 64U; ++i)
{
#if defined(WIDE_INTEGER_NAMESPACE)
result_is_ok &= WIDE_INTEGER_NAMESPACE::math::wide_integer::example001_mul_div();
#else
result_is_ok &= ::math::wide_integer::example001_mul_div();
#endif
}
example_standalone_result =
static_cast<std::uint32_t>
(
result_is_ok ? example_standalone_foodcafe : static_cast<std::uint32_t>(UINT32_C(0xFFFFFFFF))
);
#if !defined(WIDE_INTEGER_DISABLE_IOSTREAM)
std::cout << "result_is_ok: " << std::boolalpha << result_is_ok << std::endl;
#endif
return result_is_ok;
}
auto example_get_standalone_result(void) -> bool
{
volatile auto result_is_ok =
(example_standalone_result == static_cast<std::uint32_t>(UINT32_C(0xF00DCAFE)));
return result_is_ok;
}
}
auto main() -> int
{
auto result_is_ok = true;
result_is_ok = (::example_run_standalone () && result_is_ok);
result_is_ok = (::example_get_standalone_result() && result_is_ok);
return (result_is_ok ? 0 : -1);
}
extern "C"
{
volatile std::uint32_t example_standalone_result;
}
#endif