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Sprout/sprout/cstring/strlen.hpp
2013-01-03 17:01:50 +09:00

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#ifndef SPROUT_CSTRING_STRLEN_HPP
#define SPROUT_CSTRING_STRLEN_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/iterator/ptr_index_iterator.hpp>
#include HDR_ALGORITHM_SSCRISK_CEL_OR_SPROUT
#include <sprout/iterator/operation.hpp>
namespace sprout {
// 7.21.6.3 strlen ŠÖ<C5A0>
inline SPROUT_CONSTEXPR std::size_t
strlen(char const* s) {
return !*s ? 0
: 1 + sprout::strlen(s + 1)
;
}
inline SPROUT_CONSTEXPR std::size_t
strlen(char const* s, std::size_t n) {
return sprout::distance(
sprout::as_iterator(s),
NS_SSCRISK_CEL_OR_SPROUT::find(sprout::as_iterator(s), sprout::as_iterator(s, n), '\0')
);
}
} // namespace sprout
#endif // #ifndef SPROUT_CSTRING_STRLEN_HPP