Sprout/sprout/cstring/strcspn.hpp
2012-10-06 00:58:56 +09:00

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#ifndef SPROUT_CSTRING_STRCSPN_HPP
#define SPROUT_CSTRING_STRCSPN_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/cstring/strchr.hpp>
namespace sprout {
// Copyright (C) 2011 RiSK (sscrisk)
namespace detail {
inline SPROUT_CONSTEXPR std::size_t
strcspn_impl(char const* s1, char const* s2, std::size_t n) {
return !*s1 || sprout::strchr(s2, *s1) ? n
: sprout::detail::strcspn_impl(s1 + 1, s2, n + 1)
;
}
} // amespace detail
// 7.21.5.3 strcspn ŠÖ<C5A0>
inline SPROUT_CONSTEXPR std::size_t
strcspn(char const* s1, char const* s2) {
return sprout::detail::strcspn_impl(s1, s2, 0);
}
} // namespace sprout
#endif // #ifndef SPROUT_CSTRING_STRCSPN_HPP