Sprout/sprout/cstring/strncat.hpp

49 lines
1.5 KiB
C++

/*=============================================================================
Copyright (c) 2011-2014 Bolero MURAKAMI
https://github.com/bolero-MURAKAMI/Sprout
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#ifndef SPROUT_CSTRING_STRNCAT_HPP
#define SPROUT_CSTRING_STRNCAT_HPP
#include <iterator>
#include <sprout/config.hpp>
namespace sprout {
namespace detail {
template<typename OutputCStrIterator, typename CStrIterator>
inline SPROUT_CXX14_CONSTEXPR OutputCStrIterator
strncat(OutputCStrIterator s1, CStrIterator s2, std::size_t n) {
typedef typename std::iterator_traits<OutputCStrIterator>::value_type value_type;
OutputCStrIterator result = s1;
while (*s1) {
++s1;
}
while (n) {
--n;
if (!(*s1++ = *s2++)) {
break;
}
}
*s1 = value_type();
return result;
}
} // namespace detail
// 7.21.3.2 The strncat function
//
inline SPROUT_CXX14_CONSTEXPR char*
strncat(char* s1, char const* s2, std::size_t n) {
return sprout::detail::strncat(s1, s2, n);
}
template<typename Elem>
inline SPROUT_CXX14_CONSTEXPR Elem*
strncat(Elem* s1, Elem const* s2, std::size_t n) {
return sprout::detail::strncat(s1, s2, n);
}
} // namespace sprout
#endif // #ifndef SPROUT_CSTRING_STRNCAT_HPP