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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/parser.hpp>
#include <boost/charconv/chars_format.hpp>
#include <boost/charconv/to_chars.hpp>
#include <boost/core/lightweight_test.hpp>
#include <system_error>
#include <type_traits>
#include <cstdint>
#include <cstring>
#include <cerrno>
void test_integer()
{
std::uint64_t significand {};
std::int64_t exponent {};
bool sign {};
const char* val1 = "12";
auto r1 = boost::charconv::detail::parser(val1, val1 + std::strlen(val1), sign, significand, exponent);
BOOST_TEST(r1.ec == std::errc());
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(significand, UINT64_C(12));
BOOST_TEST_EQ(exponent, 0);
significand = 0;
exponent = 0;
sign = false;
const char* val2 = "123456789";
auto r2 = boost::charconv::detail::parser(val2, val2 + std::strlen(val2), sign, significand, exponent);
BOOST_TEST(r2.ec == std::errc());
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(exponent, 0);
BOOST_TEST_EQ(significand, UINT64_C(123456789));
auto r3 = boost::charconv::detail::parser(val2, val2 + std::strlen(val2), sign, significand, exponent, boost::charconv::chars_format::scientific);
BOOST_TEST(r3.ec == std::errc::invalid_argument);
// Get the maximum value of the significant type
constexpr auto max_sig_v = (std::numeric_limits<decltype(significand)>::max)();
char max_sig_buf[boost::charconv::limits<decltype(significand)>::max_chars10 + 1u];
const auto r4 = boost::charconv::to_chars(max_sig_buf + 1, max_sig_buf + sizeof(max_sig_buf), max_sig_v);
if (BOOST_TEST(r4)) {
significand = 0;
exponent = 1;
sign = true;
auto r5 = boost::charconv::detail::parser(max_sig_buf + 1, r4.ptr, sign, significand, exponent);
BOOST_TEST(r5);
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(exponent, 0);
BOOST_TEST_EQ(significand, max_sig_v);
significand = 0;
exponent = 1;
sign = false;
max_sig_buf[0] = '-';
auto r6 = boost::charconv::detail::parser(max_sig_buf, r4.ptr, sign, significand, exponent);
BOOST_TEST(r6);
BOOST_TEST_EQ(sign, true);
BOOST_TEST_EQ(exponent, 0);
BOOST_TEST_EQ(significand, max_sig_v);
}
// Small significant type
std::uint8_t significand_8{};
exponent = 0;
sign = false;
const char* val3 = "255";
auto r5 = boost::charconv::detail::parser(val3, val3 + std::strlen(val3), sign, significand_8, exponent);
BOOST_TEST(r5);
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(exponent, 0);
BOOST_TEST_EQ(significand_8, 255);
const char* val4 = "256";
auto r6 = boost::charconv::detail::parser(val4, val4 + std::strlen(val4), sign, significand_8, exponent);
BOOST_TEST(r6.ec == std::errc::result_out_of_range);
}
void test_scientific()
{
std::uint64_t significand {};
std::int64_t exponent {};
bool sign {};
const char* val1 = "-1e1";
auto r1 = boost::charconv::detail::parser(val1, val1 + std::strlen(val1), sign, significand, exponent);
BOOST_TEST(r1.ec == std::errc());
BOOST_TEST_EQ(sign, true);
BOOST_TEST_EQ(significand, UINT64_C(1));
BOOST_TEST_EQ(exponent, 1);
significand = 0;
exponent = 0;
sign = false;
const char* val2 = "123456789e10";
auto r2 = boost::charconv::detail::parser(val2, val2 + std::strlen(val2), sign, significand, exponent);
BOOST_TEST(r2.ec == std::errc());
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(exponent, 10);
BOOST_TEST_EQ(significand, UINT64_C(123456789));
significand = 0;
exponent = 0;
sign = false;
const char* val3 = "1.23456789e+10";
auto r3 = boost::charconv::detail::parser(val3, val3 + std::strlen(val3), sign, significand, exponent);
BOOST_TEST(r3.ec == std::errc());
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(exponent, 2);
BOOST_TEST_EQ(significand, UINT64_C(123456789));
const char* val4 = "1.23456789e-10";
auto r4 = boost::charconv::detail::parser(val4, val4 + std::strlen(val4), sign, significand, exponent);
BOOST_TEST(r4.ec == std::errc());
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(exponent, -18);
BOOST_TEST_EQ(significand, UINT64_C(123456789));
auto r5 = boost::charconv::detail::parser(val4, val4 + std::strlen(val4), sign, significand, exponent, boost::charconv::chars_format::fixed);
BOOST_TEST(r5.ec == std::errc::invalid_argument);
const char* val6 = "987654321e10";
auto r6 = boost::charconv::detail::parser(val6, val6 + std::strlen(val6), sign, significand, exponent);
BOOST_TEST(r6.ec == std::errc());
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(exponent, 10);
BOOST_TEST_EQ(significand, UINT64_C(987654321));
const char* val7 = "1.23456789E+10";
auto r7 = boost::charconv::detail::parser(val7, val7 + std::strlen(val7), sign, significand, exponent);
BOOST_TEST(r7.ec == std::errc());
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(exponent, 2);
BOOST_TEST_EQ(significand, UINT64_C(123456789));
}
void test_hex_integer()
{
std::uint64_t significand {};
std::int64_t exponent {};
bool sign {};
const char* val1 = "2a";
auto r1 = boost::charconv::detail::parser(val1, val1 + std::strlen(val1), sign, significand, exponent, boost::charconv::chars_format::hex);
BOOST_TEST(r1.ec == std::errc());
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(significand, UINT64_C(42));
BOOST_TEST_EQ(exponent, 0);
significand = 0;
exponent = 0;
sign = false;
const char* val2 = "-1a3b5c7d9";
auto r2 = boost::charconv::detail::parser(val2, val2 + std::strlen(val2), sign, significand, exponent, boost::charconv::chars_format::hex);
BOOST_TEST(r2.ec == std::errc());
BOOST_TEST_EQ(sign, true);
BOOST_TEST_EQ(exponent, 0);
BOOST_TEST_EQ(significand, UINT64_C(7041566681));
auto r3 = boost::charconv::detail::parser(val2, val2 + std::strlen(val2), sign, significand, exponent, boost::charconv::chars_format::scientific);
BOOST_TEST(r3.ec == std::errc::invalid_argument);
}
void test_hex_scientific()
{
std::uint64_t significand {};
std::int64_t exponent {};
bool sign {};
const char* val1 = "2ap+5";
auto r1 = boost::charconv::detail::parser(val1, val1 + std::strlen(val1), sign, significand, exponent, boost::charconv::chars_format::hex);
BOOST_TEST(r1.ec == std::errc());
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(significand, UINT64_C(42));
BOOST_TEST_EQ(exponent, 5);
significand = 0;
exponent = 0;
sign = false;
const char* val2 = "-1.3a2bp-10";
auto r2 = boost::charconv::detail::parser(val2, val2 + std::strlen(val2), sign, significand, exponent, boost::charconv::chars_format::hex);
BOOST_TEST(r2.ec == std::errc());
BOOST_TEST_EQ(sign, true);
BOOST_TEST_EQ(exponent, -14);
BOOST_TEST_EQ(significand, UINT64_C(80427));
auto r3 = boost::charconv::detail::parser(val2, val2 + std::strlen(val2), sign, significand, exponent, boost::charconv::chars_format::scientific);
BOOST_TEST(r3.ec == std::errc::invalid_argument);
const char* val4 = "-1.3A2BP-10";
auto r4 = boost::charconv::detail::parser(val4, val4 + std::strlen(val4), sign, significand, exponent, boost::charconv::chars_format::hex);
BOOST_TEST(r4.ec == std::errc());
BOOST_TEST_EQ(sign, true);
BOOST_TEST_EQ(exponent, -14);
BOOST_TEST_EQ(significand, UINT64_C(80427));
}
void test_zeroes()
{
for (const char* val : {
"0", "00", "000", "0000",
"0.", "00.", "000.", "0000.",
"0.0", "00.0", "000.0", "0000.0",
"0e0", "00e0", "000e0", "0000e0",
"0.e0", "00.e0", "000.e0", "0000.e0",
"0.0e0", "00.0e0", "000.0e0", "0000.0e0",
}) {
// Use small integer type to reduce input test string lengths
std::uint8_t significand = 1;
std::int64_t exponent = 1;
bool sign = (std::strlen(val) % 2) == 0; // Different initial values
auto r1 = boost::charconv::detail::parser(val, val + std::strlen(val), sign, significand, exponent);
BOOST_TEST(r1);
BOOST_TEST_EQ(sign, false);
BOOST_TEST_EQ(significand, 0u);
BOOST_TEST_EQ(exponent, 0);
}
}
int main()
{
test_integer();
test_scientific();
test_hex_integer();
test_hex_scientific();
test_zeroes();
return boost::report_errors();
}
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