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add atoi, atol, strtol

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This commit is contained in:
bolero-MURAKAMI 2012-04-15 00:48:31 +09:00
parent 1968a6fac4
commit 50fd5f33bf
11 changed files with 307 additions and 55 deletions
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41
sprout/detail/char_conversion.hpp Normal file
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@ -0,0 +1,41 @@
#ifndef SPROUT_DETAIL_CHAR_CONVERSION_HPP
#define SPROUT_DETAIL_CHAR_CONVERSION_HPP
#include <cstddef>
#include <stdexcept>
#include <sprout/config.hpp>
namespace sprout {
namespace detail {
template<typename Elem, typename IntType>
inline SPROUT_CONSTEXPR Elem int_to_char(IntType val, std::size_t base){
return val >= 0 && val < 10 ? static_cast<Elem>('0') + val
: val >= 10 && val < base ? static_cast<Elem>('a') + (val - 10)
: throw std::invalid_argument("value out of bounds")
;
}
template<typename Elem, typename IntType>
inline SPROUT_CONSTEXPR Elem int_to_char(IntType val){
return val >= 0 && val < 10 ? static_cast<Elem>('0') + val
: throw std::invalid_argument("value out of bounds")
;
}
template<typename IntType, typename Elem>
inline SPROUT_CONSTEXPR IntType char_to_int(Elem c, std::size_t base){
return c >= static_cast<Elem>('0') && c <= static_cast<Elem>('9') ? c - static_cast<Elem>('0')
: c >= static_cast<Elem>('a') && c <= static_cast<Elem>('a' + (base - 11)) ? c - static_cast<Elem>('a') + 10
: c >= static_cast<Elem>('A') && c <= static_cast<Elem>('A' + (base - 11)) ? c - static_cast<Elem>('A') + 10
: static_cast<IntType>(-1)
;
}
template<typename IntType, typename Elem>
inline SPROUT_CONSTEXPR IntType char_to_int(Elem c){
return c >= static_cast<Elem>('0') && c <= static_cast<Elem>('9') ? c - static_cast<Elem>('0')
: static_cast<IntType>(-1)
;
}
} // namespace detail
} // namespace sprout
#endif // #ifndef SPROUT_DETAIL_CHAR_CONVERSION_HPP

52
sprout/detail/param_at.hpp
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@ -6,32 +6,32 @@
#include <sprout/config.hpp>
namespace sprout {
namespace detail {
template<typename R, typename T, typename... Values>
inline SPROUT_CONSTEXPR typename std::enable_if<
sizeof...(Values) == 0,
R
>::type param_at(
std::size_t n,
T const& v,
Values const&... values
)
{
return v;
}
template<typename R, typename T, typename... Values>
inline SPROUT_CONSTEXPR typename std::enable_if<
sizeof...(Values) != 0,
R
>::type param_at(
std::size_t n,
T const& v,
Values const&... values
)
{
return n == 0 ? v : sprout::detail::param_at<R>(n - 1, values...);
}
} // namespace detail
namespace detail {
template<typename R, typename T, typename... Values>
inline SPROUT_CONSTEXPR typename std::enable_if<
sizeof...(Values) == 0,
R
>::type param_at(
std::size_t n,
T const& v,
Values const&... values
)
{
return v;
}
template<typename R, typename T, typename... Values>
inline SPROUT_CONSTEXPR typename std::enable_if<
sizeof...(Values) != 0,
R
>::type param_at(
std::size_t n,
T const& v,
Values const&... values
)
{
return n == 0 ? v : sprout::detail::param_at<R>(n - 1, values...);
}
} // namespace detail
} // namespace sprout
#endif // #ifndef SPROUT_DETAIL_PARAM_AT_HPP