mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
#ifndef SPROUT_DETAIL_CHAR_CONVERSION_HPP
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#define SPROUT_DETAIL_CHAR_CONVERSION_HPP
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#include <cstddef>
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#include <stdexcept>
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#include <sprout/config.hpp>
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#include <sprout/ctype/ascii.hpp>
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#include <sprout/assert.hpp>
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namespace sprout {
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namespace detail {
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template<typename Elem, typename IntType>
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inline SPROUT_CONSTEXPR Elem
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int_to_char(IntType val, int base) {
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return SPROUT_ASSERT(2 <= base && base <= 36), SPROUT_ASSERT(IntType(0) <= val && val < static_cast<IntType>(base)),
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val < 10 ? static_cast<Elem>('0') + val
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: static_cast<Elem>('a') + (val - 10)
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;
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}
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template<typename Elem, typename IntType>
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inline SPROUT_CONSTEXPR Elem
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int_to_char(IntType val) {
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return SPROUT_ASSERT(IntType(0) <= val && val < IntType(10)),
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static_cast<Elem>('0') + val
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;
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}
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template<typename IntType, typename Elem>
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inline SPROUT_CONSTEXPR IntType
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char_to_int(Elem c, int base) {
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return sprout::ascii::isdigit(c) && c - static_cast<Elem>('0') < base ? c - static_cast<Elem>('0')
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: sprout::ascii::islower(c) && c - static_cast<Elem>('a') + 10 < base ? c - static_cast<Elem>('a') + 10
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: sprout::ascii::isupper(c) && c - static_cast<Elem>('A') + 10 < base ? c - static_cast<Elem>('A') + 10
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: static_cast<IntType>(-1)
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;
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}
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template<typename IntType, typename Elem>
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inline SPROUT_CONSTEXPR IntType
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char_to_int(Elem c) {
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return sprout::ascii::isdigit(c) ? c - static_cast<Elem>('0')
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: static_cast<IntType>(-1)
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;
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}
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} // namespace detail
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} // namespace sprout
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#endif // #ifndef SPROUT_DETAIL_CHAR_CONVERSION_HPP
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