Sprout/sprout/cwchar/wcslen.hpp
2012-12-22 01:02:49 +09:00

30 lines
764 B
C++

#ifndef SPROUT_CWCHAR_WCSLEN_HPP
#define SPROUT_CWCHAR_WCSLEN_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/iterator/ptr_index_iterator.hpp>
#include HDR_ALGORITHM_SSCRISK_CEL_OR_SPROUT
#include HDR_ITERATOR_SSCRISK_CEL_OR_SPROUT
namespace sprout {
//
// wcslen
//
inline SPROUT_CONSTEXPR std::size_t
wcslen(wchar_t const* s) {
return !*s ? 0
: 1 + sprout::wcslen(s + 1)
;
}
inline SPROUT_CONSTEXPR std::size_t
wcslen(wchar_t const* s, std::size_t n) {
return NS_SSCRISK_CEL_OR_SPROUT::distance(
sprout::as_iterator(s),
NS_SSCRISK_CEL_OR_SPROUT::find(sprout::as_iterator(s), sprout::as_iterator(s, n), L'\0')
);
}
} // namespace sprout
#endif // #ifndef SPROUT_CWCHAR_WCSLEN_HPP