forked from OSchip/llvm-project
77 lines
2.5 KiB
C++
77 lines
2.5 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 <__config>
|
|
#include <__algorithm/comp.h>
|
|
#include <__algorithm/comp_ref_type.h>
|
|
#include <__algorithm/copy.h>
|
|
#include <__iterator/iterator_traits.h>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
#pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_PUSH_MACROS
|
|
#include <__undef_macros>
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
template <class _Compare, class _InputIterator1, class _InputIterator2, class _OutputIterator>
|
|
_LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
_OutputIterator
|
|
__merge(_InputIterator1 __first1, _InputIterator1 __last1,
|
|
_InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)
|
|
{
|
|
for (; __first1 != __last1; ++__result)
|
|
{
|
|
if (__first2 == __last2)
|
|
return _VSTD::copy(__first1, __last1, __result);
|
|
if (__comp(*__first2, *__first1))
|
|
{
|
|
*__result = *__first2;
|
|
++__first2;
|
|
}
|
|
else
|
|
{
|
|
*__result = *__first1;
|
|
++__first1;
|
|
}
|
|
}
|
|
return _VSTD::copy(__first2, __last2, __result);
|
|
}
|
|
|
|
template <class _InputIterator1, class _InputIterator2, class _OutputIterator, class _Compare>
|
|
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
_OutputIterator
|
|
merge(_InputIterator1 __first1, _InputIterator1 __last1,
|
|
_InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result, _Compare __comp)
|
|
{
|
|
typedef typename __comp_ref_type<_Compare>::type _Comp_ref;
|
|
return _VSTD::__merge<_Comp_ref>(__first1, __last1, __first2, __last2, __result, __comp);
|
|
}
|
|
|
|
template <class _InputIterator1, class _InputIterator2, class _OutputIterator>
|
|
inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
|
|
_OutputIterator
|
|
merge(_InputIterator1 __first1, _InputIterator1 __last1,
|
|
_InputIterator2 __first2, _InputIterator2 __last2, _OutputIterator __result)
|
|
{
|
|
typedef typename iterator_traits<_InputIterator1>::value_type __v1;
|
|
typedef typename iterator_traits<_InputIterator2>::value_type __v2;
|
|
return _VSTD::merge(__first1, __last1, __first2, __last2, __result, __less<__v1, __v2>());
|
|
}
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
_LIBCPP_POP_MACROS
|
|
|
|
#endif // _LIBCPP___ALGORITHM_MERGE_H
|