mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 15:03:34 +00:00
69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___ALGORITHM_MERGE_H
|
|
#define _LIBCPP___ALGORITHM_MERGE_H
|
|
|
|
#include <__algorithm/comp.h>
|
|
#include <__algorithm/comp_ref_type.h>
|
|
#include <__algorithm/copy.h>
|
|
#include <__config>
|
|
#include <__iterator/iterator_traits.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator>
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator __merge(
|
|
_InputIterator1 __first1,
|
|
_InputIterator1 __last1,
|
|
_InputIterator2 __first2,
|
|
_InputIterator2 __last2,
|
|
_OutputIterator __result,
|
|
_Compare __comp) {
|
|
for (; __first1 != __last1; ++__result) {
|
|
if (__first2 == __last2)
|
|
return std::copy(__first1, __last1, __result);
|
|
if (__comp(*__first2, *__first1)) {
|
|
*__result = *__first2;
|
|
++__first2;
|
|
} else {
|
|
*__result = *__first1;
|
|
++__first1;
|
|
}
|
|
}
|
|
return std::copy(__first2, __last2, __result);
|
|
}
|
|
|
|
template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
|
|
merge(_InputIterator1 __first1,
|
|
_InputIterator1 __last1,
|
|
_InputIterator2 __first2,
|
|
_InputIterator2 __last2,
|
|
_OutputIterator __result,
|
|
_Compare __comp) {
|
|
return std::__merge<__comp_ref_type<_Compare> >(__first1, __last1, __first2, __last2, __result, __comp);
|
|
}
|
|
|
|
template <class _InputIterator1, class _InputIterator2, class _OutputIterator>
|
|
inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _OutputIterator
|
|
merge(_InputIterator1 __first1,
|
|
_InputIterator1 __last1,
|
|
_InputIterator2 __first2,
|
|
_InputIterator2 __last2,
|
|
_OutputIterator __result) {
|
|
return std::merge(__first1, __last1, __first2, __last2, __result, __less<>());
|
|
}
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // _LIBCPP___ALGORITHM_MERGE_H
|