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charconv/test/test_boost_json_values.cpp

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// Copyright (c) 2019 Vinnie Falco (vinnie.falco@gmail.com)
// Copyright (c) 2020 Krystian Stasiowski (sdkrystian@gmail.com)
// Copyright 2023 Matt Borland
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
//
// See: https://github.com/boostorg/json/issues/599
// See: https://github.com/boostorg/json/blob/develop/test/double.cpp
#include <boost/charconv.hpp>
#include <boost/core/lightweight_test.hpp>
#include <system_error>
#include <vector>
#include <iostream>
#include <iomanip>
#include <string>
#include <limits>
#include <random>
#include <type_traits>
#include <cstring>
#include <cinttypes>
template <typename T>
void grind(const std::string& str, const T expected_value)
{
// From string to expected value
T v {};
auto from_r = boost::charconv::from_chars(str.c_str(), str.c_str() + std::strlen(str.c_str()), v);
if (!(BOOST_TEST_EQ(v, expected_value) && BOOST_TEST(from_r.ec == std::errc())))
{
// LCOV_EXCL_START
std::cerr << "Expected value: " << expected_value << "\nFrom chars value: " << v << std::endl;
return;
// LCOV_EXCL_STOP
}
// Roundtrip
T roundtrip_v {};
char buffer[256] {};
auto to_r = boost::charconv::to_chars(buffer, buffer + sizeof(buffer), expected_value);
BOOST_TEST(to_r.ec == std::errc());
auto roundtrip_r = boost::charconv::from_chars(buffer, buffer + std::strlen(buffer), roundtrip_v);
if (!(BOOST_TEST_EQ(roundtrip_v, expected_value) && BOOST_TEST(roundtrip_r.ec == std::errc())))
{
// LCOV_EXCL_START
std::cerr << "Expected value: " << expected_value << "\nRoundtrip value: " << roundtrip_v << std::endl;
return;
// LCOV_EXCL_STOP
}
}
void grind_double(const std::string& str, const double expected_value)
{
grind<double>(str, expected_value);
}
void grind_int64(const std::string& str, const std::int64_t expected_value)
{
grind<std::int64_t>(str, expected_value);
}
void grind_uint64(const std::string& str, const std::uint64_t expected_value)
{
grind<std::uint64_t>(str, expected_value);
}
template <typename T>
void spot_value(const std::string& buffer, T expected_value)
{
T v = 0;
auto r = boost::charconv::from_chars_erange(buffer.c_str(), buffer.c_str() + std::strlen(buffer.c_str()), v);
BOOST_TEST(r.ec == std::errc());
if (!BOOST_TEST_EQ(v, expected_value))
{
std::cerr << "Test failure for: " << buffer << " got: " << v << std::endl; // LCOV_EXCL_LINE
}
}
void fc (const std::string& s)
{
char* str_end;
const double expected_value = std::strtod(s.c_str(), &str_end);
spot_value(s, expected_value);
}
// https://github.com/boostorg/json/issues/599
void issue_599_test()
{
const std::vector<double> ref_values = {
-0.27006296145688152
, -0.42448451824686562
, 0.057166336253381224
, 1217.2772861138403
, -161.68713249779881
, 267.04251495962637
, -0.66615716744854903
, -0.80918535242172396
, 0.29123256908034584
, 2137.0241926849581
, -599.61476423470071
, 1002.9111801605201
, -1.4239725866123634
, -1.0346132515963697
, 0.90790798114618365
, 2535.2404973980229
, -1207.1290929173115
, 2028.379668845469
, -2.2996584528580817
, -0.90521880279912548
, 1.6449616573025234
, 2314.9160231072947
, -1836.2705293282695
, 3093.6759124836558
, -2.7781953227473752
, -0.54944860097807424
, 1.9702410871568496
, 1529.7366713650281
, -2333.8061352785221
, 3939.3529821428001
, -3.0696620243882053
, -0.13139419714747352
, 2.0689802496328444
, 370.91535570754445
, -2578.5523049665962
, 4359.4347976947429
, 2.9538186832340876
, 0.29606564516163103
, 2.0456322162820761
, -879.28776788268817
, -2510.8913760620435
, 4251.6098535812462 };
for (const auto current_ref_val : ref_values)
{
char buffer[256] {};
const auto r = boost::charconv::to_chars(buffer, buffer + sizeof(buffer), current_ref_val);
BOOST_TEST(r.ec == std::errc());
double return_val {};
const auto return_r = boost::charconv::from_chars_erange(buffer, buffer + std::strlen(buffer), return_val);
BOOST_TEST(return_r.ec == std::errc());
if (!BOOST_TEST_EQ(current_ref_val, return_val))
{
// LCOV_EXCL_START
#ifdef BOOST_CHARCONV_DEBUG
std::cerr << std::setprecision(17)
<< " Value: " << current_ref_val
<< "\n To chars: " << std::string( buffer, r.ptr )
<< "\nFrom chars: " << return_val << std::endl;
#else
std::cerr << "... test failure for value=" << current_ref_val << "; buffer='" << std::string( buffer, r.ptr ) << "'" << std::endl;
#endif
// LCOV_EXCL_STOP
}
}
}
#ifdef BOOST_MSVC
# pragma warning(push)
# pragma warning(disable: 4244) // Conversion from double to T with BOOST_IF_CONSTEXPR expansion pre-C++17
#elif defined(__GNUC__) && __GNUC__ >= 5
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wmissing-field-initializers"
# pragma GCC diagnostic ignored "-Wfloat-conversion"
#elif defined(__clang__)
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wfloat-conversion"
# pragma clang diagnostic ignored "-Wconversion"
# if __clang_major__ > 7
# pragma clang diagnostic ignored "-Wimplicit-float-conversion"
# endif
#endif
template <typename T>
void check_accuracy(const char* nm, int max_ulp)
{
using Unsigned_Integer = typename std::conditional<std::is_same<T, float>::value, std::uint32_t, std::uint64_t>::type;
T x {};
BOOST_IF_CONSTEXPR (std::is_same<T, float>::value)
{
x = std::strtof( nm, nullptr );
}
else
{
x = std::strtod( nm, nullptr );
}
T y {};
boost::charconv::from_chars_erange(nm, nm + std::strlen(nm), y, boost::charconv::chars_format::scientific);
Unsigned_Integer bx;
Unsigned_Integer by;
std::memcpy( &bx, &x, sizeof(x) );
std::memcpy( &by, &y, sizeof(y) );
const auto diff = static_cast<std::int64_t>(bx - by);
if (!BOOST_TEST(std::abs( diff ) <= max_ulp))
std::fprintf(stderr,
"%s: difference %" PRId64 " ulp\n"
" strtod: %.13a %.16g\n"
" boost.json: %.13a %.16g\n\n",
nm, diff, static_cast<double>(x), static_cast<double>(x), static_cast<double>(y), static_cast<double>(y) );
}
#ifdef BOOST_MSVC
# pragma warning(pop)
#elif defined(__GNUC__) && __GNUC__ >= 5
# pragma GCC diagnostic pop
#elif defined(__clang__)
# pragma clang diagnostic pop
#endif
template <typename T>
void test_within_ulp()
{
std::mt19937_64 rng(42);
std::uniform_int_distribution<> dist( std::numeric_limits<T>::min_exponent10 - 1, std::numeric_limits<T>::max_exponent10 + 1);
check_accuracy<T>("10199214983525025199.13135016100190689227e-308", 2);
for( int i = 0; i < 1000000; ++i )
{
unsigned long long x1 = rng();
unsigned long long x2 = rng();
int x3 = dist( rng );
char buffer[ 128 ];
snprintf( buffer, sizeof(buffer), "%llu.%llue%d", x1, x2, x3 );
check_accuracy<T>(buffer, 1);
}
for( int i = -326; i <= +309; ++i )
{
char buffer[ 128 ];
snprintf( buffer, sizeof(buffer), "1e%d", i );
check_accuracy<T>(buffer, 0);
}
};
int main()
{
issue_599_test();
grind_double("-1.010", -1.01);
grind_double("-0.010", -0.01);
grind_double("-0.0", -0.0);
grind_double("-0e0", -0.0);
grind_double("18.4", 18.4);
grind_double("-18.4", -18.4);
grind_double("18446744073709551616", 1.8446744073709552e+19);
grind_double("-18446744073709551616", -1.8446744073709552e+19);
grind_double("18446744073709551616.0", 1.8446744073709552e+19);
grind_double("18446744073709551616.00009", 1.8446744073709552e+19);
grind_double("1844674407370955161600000", 1.8446744073709552e+24);
grind_double("-1844674407370955161600000", -1.8446744073709552e+24);
grind_double("1844674407370955161600000.0", 1.8446744073709552e+24);
grind_double("1844674407370955161600000.00009", 1.8446744073709552e+24);
grind_double("19700720435664.186294290058937593e13", 1.9700720435664185e+26);
grind_double("1.0", 1.0);
grind_double("1.1", 1.1);
grind_double("1.11", 1.11);
grind_double("1.11111", 1.11111);
grind_double("11.1111", 11.1111);
grind_double("111.111", 111.111);
// From https://github.com/boostorg/json/blob/develop/test/stream_parser.cpp#L673
grind_int64( "-9223372036854775808", INT64_MIN);
grind_int64( "-9223372036854775807", -9223372036854775807);
grind_int64( "-999999999999999999", -999999999999999999);
grind_int64( "-99999999999999999", -99999999999999999);
grind_int64( "-9999999999999999", -9999999999999999);
grind_int64( "-999999999999999", -999999999999999);
grind_int64( "-99999999999999", -99999999999999);
grind_int64( "-9999999999999", -9999999999999);
grind_int64( "-999999999999", -999999999999);
grind_int64( "-99999999999", -99999999999);
grind_int64( "-9999999999", -9999999999);
grind_int64( "-999999999", -999999999);
grind_int64( "-99999999", -99999999);
grind_int64( "-9999999", -9999999);
grind_int64( "-999999", -999999);
grind_int64( "-99999", -99999);
grind_int64( "-9999", -9999);
grind_int64( "-999", -999);
grind_int64( "-99", -99);
grind_int64( "-9", -9);
grind_int64( "-0", 0);
grind_int64( "0", 0);
grind_int64( "1", 1);
grind_int64( "9", 9);
grind_int64( "99", 99);
grind_int64( "999", 999);
grind_int64( "9999", 9999);
grind_int64( "99999", 99999);
grind_int64( "999999", 999999);
grind_int64( "9999999", 9999999);
grind_int64( "99999999", 99999999);
grind_int64( "999999999", 999999999);
grind_int64( "9999999999", 9999999999);
grind_int64( "99999999999", 99999999999);
grind_int64( "999999999999", 999999999999);
grind_int64( "9999999999999", 9999999999999);
grind_int64( "99999999999999", 99999999999999);
grind_int64( "999999999999999", 999999999999999);
grind_int64( "9999999999999999", 9999999999999999);
grind_int64( "99999999999999999", 99999999999999999);
grind_int64( "999999999999999999", 999999999999999999);
grind_int64( "9223372036854775807", INT64_MAX);
grind_uint64( "9223372036854775808", 9223372036854775808ULL);
grind_uint64( "9999999999999999999", 9999999999999999999ULL);
grind_uint64( "18446744073709551615", UINT64_MAX);
grind_double("-1.010", -1.01);
grind_double("-0.010", -0.01);
grind_double("-0.0", -0.0);
grind_double("-0e0", -0.0);
grind_double( "18446744073709551616", 1.8446744073709552e+19);
grind_double("-18446744073709551616", -1.8446744073709552e+19);
grind_double( "18446744073709551616.0", 1.8446744073709552e+19);
grind_double( "18446744073709551616.00009", 1.8446744073709552e+19);
grind_double( "1844674407370955161600000", 1.8446744073709552e+24);
grind_double("-1844674407370955161600000", -1.8446744073709552e+24);
grind_double( "1844674407370955161600000.0", 1.8446744073709552e+24);
grind_double( "1844674407370955161600000.00009", 1.8446744073709552e+24);
grind_double( "1.0", 1.0);
grind_double( "1.1", 1.1);
grind_double( "1.11", 1.11);
grind_double( "1.11111", 1.11111);
grind_double( "11.1111", 11.1111);
grind_double( "111.111", 111.111);
fc("-999999999999999999999");
fc("-100000000000000000009");
fc("-10000000000000000000");
fc("-9223372036854775809");
fc("18446744073709551616");
fc("99999999999999999999");
fc("999999999999999999999");
fc("1000000000000000000000");
fc("9999999999999999999999");
fc("99999999999999999999999");
fc("-0.9999999999999999999999");
fc("-0.9999999999999999");
fc("-0.9007199254740991");
fc("-0.999999999999999");
fc("-0.99999999999999");
fc("-0.9999999999999");
fc("-0.999999999999");
fc("-0.99999999999");
fc("-0.9999999999");
fc("-0.999999999");
fc("-0.99999999");
fc("-0.9999999");
fc("-0.999999");
fc("-0.99999");
fc("-0.9999");
fc("-0.8125");
fc("-0.999");
fc("-0.99");
fc("-1.0");
fc("-0.9");
fc("-0.0");
fc("0.0");
fc("0.9");
fc("0.99");
fc("0.999");
fc("0.8125");
fc("0.9999");
fc("0.99999");
fc("0.999999");
fc("0.9999999");
fc("0.99999999");
fc("0.999999999");
fc("0.9999999999");
fc("0.99999999999");
fc("0.999999999999");
fc("0.9999999999999");
fc("0.99999999999999");
fc("0.999999999999999");
fc("0.9007199254740991");
fc("0.9999999999999999");
fc("0.9999999999999999999999");
fc("0.999999999999999999999999999");
fc("-1e308");
fc("-1e-308");
fc("-9999e300");
fc("-999e100");
fc("-99e10");
fc("-9e1");
fc("9e1");
fc("99e10");
fc("999e100");
fc("9999e300");
fc("999999999999999999.0");
fc("999999999999999999999.0");
fc("999999999999999999999e5");
fc("999999999999999999999.0e5");
fc("0.00000000000000001");
fc("-1e-1");
fc("-1e0");
fc("-1e1");
fc("0e0");
fc("1e0");
fc("1e10");
fc("0."
"00000000000000000000000000000000000000000000000000" // 50 zeroes
"1e50");
fc("-0."
"00000000000000000000000000000000000000000000000000" // 50 zeroes
"1e50");
fc("0."
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000" // 500 zeroes
"1e600");
fc("-0."
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000" // 500 zeroes
"1e600");
fc("0e"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000"
"00000000000000000000000000000000000000000000000000" // 500 zeroes
);
// Reported in issue #29
// https://github.com/cppalliance/charconv/issues/29
fc("0E0");
fc("0E01");
fc("0.0e0");
fc("-0E0");
fc("-0E01");
fc("-0.0e0");
// Reported in issue #39
// https://github.com/cppalliance/charconv/issues/39
fc("13037152512515243620.9123444678836069176e0");
fc("17697431460539906388.13521888826860801885e0");
fc("17947220026488055965.10643827068131766968e0");
fc("11270160277506678000.2887804927902173715e-2");
fc("16014537415383412664.8126122414435723949e0");
test_within_ulp<double>();
test_within_ulp<float>();
#ifdef BOOST_CHARCONV_FULL_LONG_DOUBLE_IMPL
test_within_ulp<long double>();
#endif
return boost::report_errors();
}
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