mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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116 lines
3.9 KiB
C++
116 lines
3.9 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2013 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_UTILITY_STRING_REF_STRING_TO_FLOAT_HPP
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#define SPROUT_UTILITY_STRING_REF_STRING_TO_FLOAT_HPP
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#include <string>
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#include <type_traits>
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#include <sprout/config.hpp>
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#include <sprout/utility/string_ref/string_ref.hpp>
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#include <sprout/cstdlib/str_to_float.hpp>
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#include <sprout/type_traits/enabler_if.hpp>
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namespace sprout {
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namespace detail {
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template<
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typename FloatType, typename Elem, typename Traits
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>
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inline FloatType string_to_float_dynamic(sprout::basic_string_ref<Elem, Traits> const& str, std::size_t* idx) {
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Elem* endptr = nullptr;
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FloatType result = sprout::detail::str_to_float<FloatType>(str.c_str(), &endptr);
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*idx = endptr - str.c_str();
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return result;
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}
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}
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//
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// string_to_float
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//
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template<
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typename FloatType, typename Elem, typename Traits,
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typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR FloatType
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string_to_float(sprout::basic_string_ref<Elem, Traits> const& str, std::size_t* idx) {
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return !idx ? sprout::detail::str_to_float<FloatType>(str.begin())
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: sprout::detail::string_to_float_dynamic<FloatType>(str, idx)
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;
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}
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template<
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typename FloatType, typename Elem, typename Traits,
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typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR FloatType
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string_to_float(sprout::basic_string_ref<Elem, Traits> const& str) {
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return sprout::detail::str_to_float<FloatType>(str.begin());
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}
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//
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// stof
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//
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template<typename Elem, typename Traits>
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inline SPROUT_CONSTEXPR float
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stof(sprout::basic_string_ref<Elem, Traits> const& str, std::size_t* idx) {
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return sprout::string_to_float<float>(str, idx);
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}
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template<typename Elem, typename Traits>
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inline SPROUT_CONSTEXPR float
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stof(sprout::basic_string_ref<Elem, Traits> const& str) {
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return sprout::string_to_float<float>(str);
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}
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//
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// stod
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//
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template<typename Elem, typename Traits>
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inline SPROUT_CONSTEXPR double
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stod(sprout::basic_string_ref<Elem, Traits> const& str, std::size_t* idx) {
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return sprout::string_to_float<double>(str, idx);
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}
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template<typename Elem, typename Traits>
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inline SPROUT_CONSTEXPR double
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stod(sprout::basic_string_ref<Elem, Traits> const& str) {
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return sprout::string_to_float<double>(str);
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}
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//
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// stold
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//
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template<typename Elem, typename Traits>
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inline SPROUT_CONSTEXPR long double
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stold(sprout::basic_string_ref<Elem, Traits> const& str, std::size_t* idx) {
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return sprout::string_to_float<long double>(str, idx);
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}
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template<typename Elem, typename Traits>
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inline SPROUT_CONSTEXPR long double
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stold(sprout::basic_string_ref<Elem, Traits> const& str) {
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return sprout::string_to_float<long double>(str);
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}
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//
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// from_string
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//
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template<
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typename FloatType, typename Elem, typename Traits,
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typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR FloatType
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from_string(sprout::basic_string_ref<Elem, Traits> const& str, std::size_t* idx) {
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return sprout::string_to_float<FloatType>(str, idx);
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}
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template<
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typename FloatType, typename Elem, typename Traits,
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typename sprout::enabler_if<std::is_floating_point<FloatType>::value>::type = sprout::enabler
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>
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inline SPROUT_CONSTEXPR FloatType
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from_string(sprout::basic_string_ref<Elem, Traits> const& str) {
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return sprout::string_to_float<FloatType>(str);
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_UTILITY_STRING_REF_STRING_TO_FLOAT_HPP
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