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| 1 | // -*- C++ -*- |
|---|---|
| 2 | //===----------------------------------------------------------------------===// |
| 3 | // |
| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 5 | // See https://llvm.org/LICENSE.txt for license information. |
| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #ifndef _LIBCPP___CXX03___ALGORITHM_EQUAL_H |
| 11 | #define _LIBCPP___CXX03___ALGORITHM_EQUAL_H |
| 12 | |
| 13 | #include <__cxx03/__algorithm/comp.h> |
| 14 | #include <__cxx03/__algorithm/unwrap_iter.h> |
| 15 | #include <__cxx03/__config> |
| 16 | #include <__cxx03/__functional/identity.h> |
| 17 | #include <__cxx03/__iterator/distance.h> |
| 18 | #include <__cxx03/__iterator/iterator_traits.h> |
| 19 | #include <__cxx03/__string/constexpr_c_functions.h> |
| 20 | #include <__cxx03/__type_traits/desugars_to.h> |
| 21 | #include <__cxx03/__type_traits/enable_if.h> |
| 22 | #include <__cxx03/__type_traits/invoke.h> |
| 23 | #include <__cxx03/__type_traits/is_equality_comparable.h> |
| 24 | #include <__cxx03/__type_traits/is_volatile.h> |
| 25 | #include <__cxx03/__utility/move.h> |
| 26 | |
| 27 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 28 | # pragma GCC system_header |
| 29 | #endif |
| 30 | |
| 31 | _LIBCPP_PUSH_MACROS |
| 32 | #include <__cxx03/__undef_macros> |
| 33 | |
| 34 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 35 | |
| 36 | template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> |
| 37 | _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool __equal_iter_impl( |
| 38 | _InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate& __pred) { |
| 39 | for (; __first1 != __last1; ++__first1, (void)++__first2) |
| 40 | if (!__pred(*__first1, *__first2)) |
| 41 | return false; |
| 42 | return true; |
| 43 | } |
| 44 | |
| 45 | template <class _Tp, |
| 46 | class _Up, |
| 47 | class _BinaryPredicate, |
| 48 | __enable_if_t<__desugars_to_v<__equal_tag, _BinaryPredicate, _Tp, _Up> && !is_volatile<_Tp>::value && |
| 49 | !is_volatile<_Up>::value && __libcpp_is_trivially_equality_comparable<_Tp, _Up>::value, |
| 50 | int> = 0> |
| 51 | _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool |
| 52 | __equal_iter_impl(_Tp* __first1, _Tp* __last1, _Up* __first2, _BinaryPredicate&) { |
| 53 | return std::__constexpr_memcmp_equal(__first1, __first2, __element_count(__last1 - __first1)); |
| 54 | } |
| 55 | |
| 56 | template <class _InputIterator1, class _InputIterator2, class _BinaryPredicate> |
| 57 | _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool |
| 58 | equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2, _BinaryPredicate __pred) { |
| 59 | return std::__equal_iter_impl( |
| 60 | std::__unwrap_iter(__first1), std::__unwrap_iter(__last1), std::__unwrap_iter(__first2), __pred); |
| 61 | } |
| 62 | |
| 63 | template <class _InputIterator1, class _InputIterator2> |
| 64 | _LIBCPP_NODISCARD inline _LIBCPP_HIDE_FROM_ABI bool |
| 65 | equal(_InputIterator1 __first1, _InputIterator1 __last1, _InputIterator2 __first2) { |
| 66 | return std::equal(__first1, __last1, __first2, __equal_to()); |
| 67 | } |
| 68 | |
| 69 | _LIBCPP_END_NAMESPACE_STD |
| 70 | |
| 71 | _LIBCPP_POP_MACROS |
| 72 | |
| 73 | #endif // _LIBCPP___CXX03___ALGORITHM_EQUAL_H |
| 74 |
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