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// Copyright 2023 Matt Borland
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/charconv/detail/integer_search_trees.hpp>
#include <boost/charconv/detail/emulated128.hpp>
#include <boost/charconv/config.hpp>
#include <boost/core/lightweight_test.hpp>
#include <type_traits>
#include <limits>
#if defined(__GNUC__) && (__GNUC__ < 7)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Woverflow"
#endif
#ifdef BOOST_CHARCONV_HAS_INT128
// Test the u128 impl
template <typename T>
void test128()
{
T max = BOOST_CHARCONV_UINT128_MAX;
max /= 10;
T val = 1;
int i = 1;
while (val < max)
{
BOOST_TEST_EQ(boost::charconv::detail::num_digits(val), i);
++i;
val *= 10;
}
BOOST_TEST_EQ(boost::charconv::detail::num_digits(max * 10), 39);
}
#endif
#if defined(__GNUC__) && (__GNUC__ < 7)
# pragma GCC diagnostic pop
#endif
#if defined(__GNUC__) && (__GNUC__ >= 5)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wconversion"
#endif
// Tests the generic, u32, and u64 impls
template <typename T>
void test()
{
constexpr T max = (std::numeric_limits<T>::max)() / 10;
T val = 1;
int i = 1;
while (val < max)
{
BOOST_TEST_EQ(boost::charconv::detail::num_digits(val), i);
++i;
val *= static_cast<T>(10);
}
BOOST_TEST_EQ(boost::charconv::detail::num_digits(val), std::numeric_limits<T>::digits10 + 1);
}
#if defined(__GNUC__) && (__GNUC__ >= 5)
# pragma GCC diagnostic pop
#endif
void test_emulated128()
{
using namespace boost::charconv::detail;
uint128 v1 {0, 1234};
BOOST_TEST_EQ(num_digits(v1), 4);
uint128 v2 {1234, 0};
BOOST_TEST_EQ(num_digits(v2), 23);
uint128 v3 {UINT64_MAX, UINT64_MAX};
BOOST_TEST_EQ(num_digits(v3), 39);
}
int main()
{
test<char>();
test<signed char>();
test<unsigned char>();
test<short>();
test<unsigned short>();
test<int>();
test<unsigned>();
test<long>();
test<unsigned long>();
test<long long>();
test<unsigned long long>();
// Specialized tables
test<std::uint32_t>();
test<std::uint64_t>();
#ifdef BOOST_CHARCONV_HAS_INT128
test128<boost::uint128_type>();
#endif
test_emulated128();
return boost::report_errors();
}
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