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// -*- 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 _PSTL_GLUE_NUMERIC_IMPL_H
#define _PSTL_GLUE_NUMERIC_IMPL_H
#include <__config>
#include <functional>
#include "execution_impl.h"
#include "numeric_fwd.h"
#include "utils.h"
namespace std {
// [exclusive.scan]
template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Tp>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> exclusive_scan(
_ExecutionPolicy&& __exec,
_ForwardIterator1 __first,
_ForwardIterator1 __last,
_ForwardIterator2 __result,
_Tp __init) {
auto __dispatch_tag = __pstl::__internal::__select_backend(__exec, __first, __result);
using namespace __pstl;
return __internal::__pattern_transform_scan(
__dispatch_tag,
std::forward<_ExecutionPolicy>(__exec),
__first,
__last,
__result,
__pstl::__internal::__no_op(),
__init,
std::plus<_Tp>(),
/*inclusive=*/std::false_type());
}
template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Tp, class _BinaryOperation>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> exclusive_scan(
_ExecutionPolicy&& __exec,
_ForwardIterator1 __first,
_ForwardIterator1 __last,
_ForwardIterator2 __result,
_Tp __init,
_BinaryOperation __binary_op) {
auto __dispatch_tag = __pstl::__internal::__select_backend(__exec, __first, __result);
using namespace __pstl;
return __internal::__pattern_transform_scan(
__dispatch_tag,
std::forward<_ExecutionPolicy>(__exec),
__first,
__last,
__result,
__pstl::__internal::__no_op(),
__init,
__binary_op,
/*inclusive=*/std::false_type());
}
// [inclusive.scan]
template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> inclusive_scan(
_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __result) {
typedef typename iterator_traits<_ForwardIterator1>::value_type _InputType;
return transform_inclusive_scan(
std::forward<_ExecutionPolicy>(__exec),
__first,
__last,
__result,
std::plus<_InputType>(),
__pstl::__internal::__no_op());
}
template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryOperation>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> inclusive_scan(
_ExecutionPolicy&& __exec,
_ForwardIterator1 __first,
_ForwardIterator1 __last,
_ForwardIterator2 __result,
_BinaryOperation __binary_op) {
return transform_inclusive_scan(
std::forward<_ExecutionPolicy>(__exec), __first, __last, __result, __binary_op, __pstl::__internal::__no_op());
}
template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _Tp, class _BinaryOperation>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> inclusive_scan(
_ExecutionPolicy&& __exec,
_ForwardIterator1 __first,
_ForwardIterator1 __last,
_ForwardIterator2 __result,
_BinaryOperation __binary_op,
_Tp __init) {
return transform_inclusive_scan(
std::forward<_ExecutionPolicy>(__exec),
__first,
__last,
__result,
__binary_op,
__pstl::__internal::__no_op(),
__init);
}
// [transform.exclusive.scan]
template <class _ExecutionPolicy,
class _ForwardIterator1,
class _ForwardIterator2,
class _Tp,
class _BinaryOperation,
class _UnaryOperation>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> transform_exclusive_scan(
_ExecutionPolicy&& __exec,
_ForwardIterator1 __first,
_ForwardIterator1 __last,
_ForwardIterator2 __result,
_Tp __init,
_BinaryOperation __binary_op,
_UnaryOperation __unary_op) {
auto __dispatch_tag = __pstl::__internal::__select_backend(__exec, __first, __result);
return __pstl::__internal::__pattern_transform_scan(
__dispatch_tag,
std::forward<_ExecutionPolicy>(__exec),
__first,
__last,
__result,
__unary_op,
__init,
__binary_op,
/*inclusive=*/std::false_type());
}
// [transform.inclusive.scan]
template <class _ExecutionPolicy,
class _ForwardIterator1,
class _ForwardIterator2,
class _BinaryOperation,
class _UnaryOperation,
class _Tp>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> transform_inclusive_scan(
_ExecutionPolicy&& __exec,
_ForwardIterator1 __first,
_ForwardIterator1 __last,
_ForwardIterator2 __result,
_BinaryOperation __binary_op,
_UnaryOperation __unary_op,
_Tp __init) {
auto __dispatch_tag = __pstl::__internal::__select_backend(__exec, __first, __result);
return __pstl::__internal::__pattern_transform_scan(
__dispatch_tag,
std::forward<_ExecutionPolicy>(__exec),
__first,
__last,
__result,
__unary_op,
__init,
__binary_op,
/*inclusive=*/std::true_type());
}
template <class _ExecutionPolicy,
class _ForwardIterator1,
class _ForwardIterator2,
class _UnaryOperation,
class _BinaryOperation>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> transform_inclusive_scan(
_ExecutionPolicy&& __exec,
_ForwardIterator1 __first,
_ForwardIterator1 __last,
_ForwardIterator2 __result,
_BinaryOperation __binary_op,
_UnaryOperation __unary_op) {
if (__first != __last) {
auto __tmp = __unary_op(*__first);
*__result = __tmp;
return transform_inclusive_scan(
std::forward<_ExecutionPolicy>(__exec), ++__first, __last, ++__result, __binary_op, __unary_op, __tmp);
} else {
return __result;
}
}
// [adjacent.difference]
template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2, class _BinaryOperation>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> adjacent_difference(
_ExecutionPolicy&& __exec,
_ForwardIterator1 __first,
_ForwardIterator1 __last,
_ForwardIterator2 __d_first,
_BinaryOperation __op) {
if (__first == __last)
return __d_first;
auto __dispatch_tag = __pstl::__internal::__select_backend(__exec, __first, __d_first);
return __pstl::__internal::__pattern_adjacent_difference(
__dispatch_tag, std::forward<_ExecutionPolicy>(__exec), __first, __last, __d_first, __op);
}
template <class _ExecutionPolicy, class _ForwardIterator1, class _ForwardIterator2>
__pstl::__internal::__enable_if_execution_policy<_ExecutionPolicy, _ForwardIterator2> adjacent_difference(
_ExecutionPolicy&& __exec, _ForwardIterator1 __first, _ForwardIterator1 __last, _ForwardIterator2 __d_first) {
typedef typename iterator_traits<_ForwardIterator1>::value_type _ValueType;
return adjacent_difference(
std::forward<_ExecutionPolicy>(__exec), __first, __last, __d_first, std::minus<_ValueType>());
}
} // namespace std
#endif /* _PSTL_GLUE_NUMERIC_IMPL_H_ */
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