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- /*=============================================================================
- Copyright (c) 2001-2010 Joel de Guzman
- 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 "../measure.hpp"
- #include <string>
- #include <vector>
- #include <cstdlib>
- #include <boost/spirit/include/qi.hpp>
- namespace
- {
- int const ndigits = 9;
- std::string numbers[ndigits] =
- {
- "1234",
- "-1.2e3",
- "0.1",
- "-1.2e-3",
- "-.2e3",
- "-2e6",
- "1.2345e5",
- "-5.7222349715140557e+307",
- "2.0332938517515416e-308"
- };
- char const* first[ndigits];
- char const* last[ndigits];
- ///////////////////////////////////////////////////////////////////////////
- struct atof_test : test::base
- {
- void benchmark()
- {
- for (int i = 0; i < ndigits; ++i)
- {
- double d = atof(first[i]);
- this->val += *reinterpret_cast<int*>(&d);
- }
- }
- };
-
- ///////////////////////////////////////////////////////////////////////////
- struct strtod_test : test::base
- {
- void benchmark()
- {
- for (int i = 0; i < ndigits; ++i)
- {
- double d = strtod(first[i], const_cast<char**>(&last[i]));
- this->val += *reinterpret_cast<int*>(&d);
- }
- }
- };
-
- ///////////////////////////////////////////////////////////////////////////
- struct spirit_double_test : test::base
- {
- static double parse(char const* first, char const* last)
- {
- double n;
- namespace qi = boost::spirit::qi;
- using qi::double_;
- qi::parse(first, last, double_, n);
- return n;
- }
- void benchmark()
- {
- for (int i = 0; i < ndigits; ++i)
- {
- double d = parse(first[i], last[i]);
- this->val += *reinterpret_cast<int*>(&d);
- }
- }
- };
- }
- int main()
- {
- std::cout << "///////////////////////////////////////////////////////////////////////////" << std::endl;
- std::cout << "Numbers to test:" << std::endl;
- for (int i = 0; i < ndigits; ++i)
- {
- first[i] = numbers[i].c_str();
- last[i] = first[i];
- while (*last[i])
- last[i]++;
- std::cout << numbers[i] << std::endl;
- }
- std::cout.precision(17);
- std::cout << "///////////////////////////////////////////////////////////////////////////" << std::endl;
- std::cout << "atof/strtod/qi.double results:" << std::endl;
- for (int i = 0; i < ndigits; ++i)
- {
- std::cout
- << atof(first[i]) << ','
- << strtod(first[i], const_cast<char**>(&last[i])) << ','
- << spirit_double_test::parse(first[i], last[i]) << ','
- << std::endl;
- }
- std::cout << "///////////////////////////////////////////////////////////////////////////" << std::endl;
- BOOST_SPIRIT_TEST_BENCHMARK(
- 10000000, // This is the maximum repetitions to execute
- (atof_test)
- (strtod_test)
- (spirit_double_test)
- )
-
- // This is ultimately responsible for preventing all the test code
- // from being optimized away. Change this to return 0 and you
- // unplug the whole test's life support system.
- return test::live_code != 0;
- }
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