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

20 lines
451 B
C++

#ifndef SPROUT_CWCHAR_WCSSPN_HPP
#define SPROUT_CWCHAR_WCSSPN_HPP
#include <cstddef>
#include <sprout/config.hpp>
#include <sprout/cwchar/wcschr.hpp>
namespace sprout {
//
// wcsspn
//
inline SPROUT_CONSTEXPR std::size_t
wcsspn(wchar_t const* s1, wchar_t const* s2) {
return !*s1 || !sprout::wcschr(s2, *s1) ? 0
: 1 + sprout::wcsspn(s1 + 1, s2)
;
}
} // namespace sprout
#endif // #ifndef SPROUT_CWCHAR_WCSSPN_HPP