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https://github.com/bolero-MURAKAMI/Sprout.git
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115 lines
3.7 KiB
C++
115 lines
3.7 KiB
C++
#ifndef SPROUT_STRING_STRING_TO_FLOAT_HPP
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#define SPROUT_STRING_STRING_TO_FLOAT_HPP
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#include <cstddef>
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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/string/string.hpp>
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#include <sprout/cstdlib/str_to_float.hpp>
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#include <sprout/utility/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,
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typename Elem,
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std::size_t N,
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typename Traits
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>
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inline FloatType string_to_float_dynamic(sprout::basic_string<Elem, N, 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,
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typename Elem,
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std::size_t N,
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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 string_to_float(sprout::basic_string<Elem, N, 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,
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typename Elem,
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std::size_t N,
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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 string_to_float(sprout::basic_string<Elem, N, 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, std::size_t N, typename Traits>
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inline SPROUT_CONSTEXPR float stof(sprout::basic_string<Elem, N, 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, std::size_t N, typename Traits>
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inline SPROUT_CONSTEXPR float stof(sprout::basic_string<Elem, N, 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, std::size_t N, typename Traits>
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inline SPROUT_CONSTEXPR double stod(sprout::basic_string<Elem, N, 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, std::size_t N, typename Traits>
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inline SPROUT_CONSTEXPR double stod(sprout::basic_string<Elem, N, 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, std::size_t N, typename Traits>
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inline SPROUT_CONSTEXPR long double stold(sprout::basic_string<Elem, N, 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, std::size_t N, typename Traits>
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inline SPROUT_CONSTEXPR long double stold(sprout::basic_string<Elem, N, 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,
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typename Elem,
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std::size_t N,
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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 from_string(sprout::basic_string<Elem, N, 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,
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typename Elem,
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std::size_t N,
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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 from_string(sprout::basic_string<Elem, N, 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_STRING_STRING_TO_FLOAT_HPP
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