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// Copyright 2020 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#pragma once
#include "pw_polyfill/standard_library/namespace.h"
_PW_POLYFILL_BEGIN_NAMESPACE_STD
template <class InputIterator, class OutputIterator>
constexpr OutputIterator copy(InputIterator first,
InputIterator last,
OutputIterator dest) {
while (first != last) {
*dest++ = *first++;
}
return dest;
}
template <typename T>
constexpr const T& min(const T& lhs, const T& rhs) {
return (rhs < lhs) ? rhs : lhs;
}
template <typename T>
constexpr const T& max(const T& lhs, const T& rhs) {
return (lhs < rhs) ? rhs : lhs;
}
template <class InputIterator, typename T>
constexpr InputIterator find(InputIterator first,
InputIterator last,
const T& value) {
for (; first != last; ++first) {
if (*first == value) {
return first;
}
}
return last;
}
template <class LhsIterator, class RhsIterator>
constexpr bool equal(LhsIterator first_l,
LhsIterator last_l,
RhsIterator first_r,
RhsIterator last_r) {
while (first_l != last_l && first_r != last_r) {
if (*first_l != *first_r) {
return false;
}
++first_l;
++first_r;
}
return first_l == last_l && first_r == last_r;
}
template <class LhsIterator, class RhsIterator>
constexpr bool lexicographical_compare(LhsIterator first_l,
LhsIterator last_l,
RhsIterator first_r,
RhsIterator last_r) {
while (first_l != last_l && first_r != last_r) {
if (*first_l < *first_r) {
return true;
}
if (*first_r < *first_l) {
return false;
}
++first_l;
++first_r;
}
return (first_l == last_l) && (first_r != last_r);
}
_PW_POLYFILL_END_NAMESPACE_STD
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