1 files changed, 530 insertions, 0 deletions

diff --git a/src/common/polyfill_ranges.h b/src/common/polyfill_ranges.h
new file mode 100644
index 000000000..ca44bfaef
--- /dev/null
+++ b/src/common/polyfill_ranges.h
@@ -0,0 +1,530 @@
+// SPDX-FileCopyrightText: 2022 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+//
+// TODO: remove this file when ranges are supported by all compilation targets
+//
+
+#pragma once
+
+#include <algorithm>
+#include <utility>
+#include <version>
+
+#ifndef __cpp_lib_ranges
+
+namespace std {
+namespace ranges {
+
+template <typename T>
+concept range = requires(T& t) {
+    begin(t);
+    end(t);
+};
+
+template <typename T>
+concept input_range = range<T>;
+
+template <typename T>
+concept output_range = range<T>;
+
+template <range R>
+using range_difference_t = ptrdiff_t;
+
+//
+// find, find_if, find_if_not
+//
+
+struct find_fn {
+    template <typename Iterator, typename T, typename Proj = std::identity>
+    constexpr Iterator operator()(Iterator first, Iterator last, const T& value,
+                                  Proj proj = {}) const {
+        for (; first != last; ++first) {
+            if (std::invoke(proj, *first) == value) {
+                return first;
+            }
+        }
+        return first;
+    }
+
+    template <ranges::input_range R, typename T, typename Proj = std::identity>
+    constexpr ranges::iterator_t<R> operator()(R&& r, const T& value, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), value, std::ref(proj));
+    }
+};
+
+struct find_if_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Pred>
+    constexpr Iterator operator()(Iterator first, Iterator last, Pred pred, Proj proj = {}) const {
+        for (; first != last; ++first) {
+            if (std::invoke(pred, std::invoke(proj, *first))) {
+                return first;
+            }
+        }
+        return first;
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity, typename Pred>
+    constexpr ranges::iterator_t<R> operator()(R&& r, Pred pred, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::ref(pred), std::ref(proj));
+    }
+};
+
+struct find_if_not_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Pred>
+    constexpr Iterator operator()(Iterator first, Iterator last, Pred pred, Proj proj = {}) const {
+        for (; first != last; ++first) {
+            if (!std::invoke(pred, std::invoke(proj, *first))) {
+                return first;
+            }
+        }
+        return first;
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity, typename Pred>
+    constexpr ranges::iterator_t<R> operator()(R&& r, Pred pred, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::ref(pred), std::ref(proj));
+    }
+};
+
+inline constexpr find_fn find;
+inline constexpr find_if_fn find_if;
+inline constexpr find_if_not_fn find_if_not;
+
+//
+// any_of, all_of, none_of
+//
+
+struct all_of_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Pred>
+    constexpr bool operator()(Iterator first, Iterator last, Pred pred, Proj proj = {}) const {
+        return ranges::find_if_not(first, last, std::ref(pred), std::ref(proj)) == last;
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity, typename Pred>
+    constexpr bool operator()(R&& r, Pred pred, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::ref(pred), std::ref(proj));
+    }
+};
+
+struct any_of_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Pred>
+    constexpr bool operator()(Iterator first, Iterator last, Pred pred, Proj proj = {}) const {
+        return ranges::find_if(first, last, std::ref(pred), std::ref(proj)) != last;
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity, typename Pred>
+    constexpr bool operator()(R&& r, Pred pred, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::ref(pred), std::ref(proj));
+    }
+};
+
+struct none_of_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Pred>
+    constexpr bool operator()(Iterator first, Iterator last, Pred pred, Proj proj = {}) const {
+        return ranges::find_if(first, last, std::ref(pred), std::ref(proj)) == last;
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity, typename Pred>
+    constexpr bool operator()(R&& r, Pred pred, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::ref(pred), std::ref(proj));
+    }
+};
+
+inline constexpr any_of_fn any_of;
+inline constexpr all_of_fn all_of;
+inline constexpr none_of_fn none_of;
+
+//
+// count, count_if
+//
+
+struct count_fn {
+    template <typename Iterator, typename T, typename Proj = std::identity>
+    constexpr ptrdiff_t operator()(Iterator first, Iterator last, const T& value,
+                                   Proj proj = {}) const {
+        ptrdiff_t counter = 0;
+        for (; first != last; ++first)
+            if (std::invoke(proj, *first) == value)
+                ++counter;
+        return counter;
+    }
+
+    template <ranges::input_range R, typename T, typename Proj = std::identity>
+    constexpr ptrdiff_t operator()(R&& r, const T& value, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), value, std::ref(proj));
+    }
+};
+
+struct count_if_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Pred>
+    constexpr ptrdiff_t operator()(Iterator first, Iterator last, Pred pred, Proj proj = {}) const {
+        ptrdiff_t counter = 0;
+        for (; first != last; ++first)
+            if (std::invoke(pred, std::invoke(proj, *first)))
+                ++counter;
+        return counter;
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity, typename Pred>
+    constexpr ptrdiff_t operator()(R&& r, Pred pred, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::ref(pred), std::ref(proj));
+    }
+};
+
+inline constexpr count_fn count;
+inline constexpr count_if_fn count_if;
+
+//
+// transform
+//
+
+struct transform_fn {
+    template <typename InputIterator, typename OutputIterator, typename F,
+              typename Proj = std::identity>
+    constexpr void operator()(InputIterator first1, InputIterator last1, OutputIterator result,
+                              F op, Proj proj = {}) const {
+        for (; first1 != last1; ++first1, (void)++result) {
+            *result = std::invoke(op, std::invoke(proj, *first1));
+        }
+    }
+
+    template <ranges::input_range R, typename OutputIterator, typename F,
+              typename Proj = std::identity>
+    constexpr void operator()(R&& r, OutputIterator result, F op, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), result, std::ref(op), std::ref(proj));
+    }
+};
+
+inline constexpr transform_fn transform;
+
+//
+// sort
+//
+
+struct sort_fn {
+    template <typename Iterator, typename Comp = ranges::less, typename Proj = std::identity>
+    constexpr void operator()(Iterator first, Iterator last, Comp comp = {}, Proj proj = {}) const {
+        if (first == last)
+            return;
+
+        Iterator last_iter = ranges::next(first, last);
+        std::sort(first, last_iter,
+                  [&](auto& lhs, auto& rhs) { return comp(proj(lhs), proj(rhs)); });
+    }
+
+    template <ranges::input_range R, typename Comp = ranges::less, typename Proj = std::identity>
+    constexpr void operator()(R&& r, Comp comp = {}, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::move(comp), std::move(proj));
+    }
+};
+
+inline constexpr sort_fn sort;
+
+//
+// fill
+//
+
+struct fill_fn {
+    template <typename T, typename OutputIterator>
+    constexpr OutputIterator operator()(OutputIterator first, OutputIterator last,
+                                        const T& value) const {
+        while (first != last) {
+            *first++ = value;
+        }
+
+        return first;
+    }
+
+    template <typename T, ranges::output_range R>
+    constexpr ranges::iterator_t<R> operator()(R&& r, const T& value) const {
+        return operator()(ranges::begin(r), ranges::end(r), value);
+    }
+};
+
+inline constexpr fill_fn fill;
+
+//
+// for_each
+//
+
+struct for_each_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Fun>
+    constexpr void operator()(Iterator first, Iterator last, Fun f, Proj proj = {}) const {
+        for (; first != last; ++first) {
+            std::invoke(f, std::invoke(proj, *first));
+        }
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity, typename Fun>
+    constexpr void operator()(R&& r, Fun f, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::move(f), std::ref(proj));
+    }
+};
+
+inline constexpr for_each_fn for_each;
+
+//
+// min_element, max_element
+//
+
+struct min_element_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Comp = ranges::less>
+    constexpr Iterator operator()(Iterator first, Iterator last, Comp comp = {},
+                                  Proj proj = {}) const {
+        if (first == last) {
+            return last;
+        }
+
+        auto smallest = first;
+        ++first;
+        for (; first != last; ++first) {
+            if (!std::invoke(comp, std::invoke(proj, *smallest), std::invoke(proj, *first))) {
+                smallest = first;
+            }
+        }
+        return smallest;
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity, typename Comp = ranges::less>
+    constexpr ranges::iterator_t<R> operator()(R&& r, Comp comp = {}, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::ref(comp), std::ref(proj));
+    }
+};
+
+struct max_element_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Comp = ranges::less>
+    constexpr Iterator operator()(Iterator first, Iterator last, Comp comp = {},
+                                  Proj proj = {}) const {
+        if (first == last) {
+            return last;
+        }
+
+        auto largest = first;
+        ++first;
+        for (; first != last; ++first) {
+            if (std::invoke(comp, std::invoke(proj, *largest), std::invoke(proj, *first))) {
+                largest = first;
+            }
+        }
+        return largest;
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity, typename Comp = ranges::less>
+    constexpr ranges::iterator_t<R> operator()(R&& r, Comp comp = {}, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::ref(comp), std::ref(proj));
+    }
+};
+
+inline constexpr min_element_fn min_element;
+inline constexpr max_element_fn max_element;
+
+//
+// replace, replace_if
+//
+
+struct replace_fn {
+    template <typename Iterator, typename T1, typename T2, typename Proj = std::identity>
+    constexpr Iterator operator()(Iterator first, Iterator last, const T1& old_value,
+                                  const T2& new_value, Proj proj = {}) const {
+        for (; first != last; ++first) {
+            if (old_value == std::invoke(proj, *first)) {
+                *first = new_value;
+            }
+        }
+        return first;
+    }
+
+    template <ranges::input_range R, typename T1, typename T2, typename Proj = std::identity>
+    constexpr ranges::iterator_t<R> operator()(R&& r, const T1& old_value, const T2& new_value,
+                                               Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), old_value, new_value, std::move(proj));
+    }
+};
+
+struct replace_if_fn {
+    template <typename Iterator, typename T, typename Proj = std::identity, typename Pred>
+    constexpr Iterator operator()(Iterator first, Iterator last, Pred pred, const T& new_value,
+                                  Proj proj = {}) const {
+        for (; first != last; ++first) {
+            if (!!std::invoke(pred, std::invoke(proj, *first))) {
+                *first = new_value;
+            }
+        }
+        return std::move(first);
+    }
+
+    template <ranges::input_range R, typename T, typename Proj = std::identity, typename Pred>
+    constexpr ranges::iterator_t<R> operator()(R&& r, Pred pred, const T& new_value,
+                                               Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::move(pred), new_value,
+                          std::move(proj));
+    }
+};
+
+inline constexpr replace_fn replace;
+inline constexpr replace_if_fn replace_if;
+
+//
+// copy, copy_if
+//
+
+struct copy_fn {
+    template <typename InputIterator, typename OutputIterator>
+    constexpr void operator()(InputIterator first, InputIterator last,
+                              OutputIterator result) const {
+        for (; first != last; ++first, (void)++result) {
+            *result = *first;
+        }
+    }
+
+    template <ranges::input_range R, typename OutputIterator>
+    constexpr void operator()(R&& r, OutputIterator result) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::move(result));
+    }
+};
+
+struct copy_if_fn {
+    template <typename InputIterator, typename OutputIterator, typename Proj = std::identity,
+              typename Pred>
+    constexpr void operator()(InputIterator first, InputIterator last, OutputIterator result,
+                              Pred pred, Proj proj = {}) const {
+        for (; first != last; ++first) {
+            if (std::invoke(pred, std::invoke(proj, *first))) {
+                *result = *first;
+                ++result;
+            }
+        }
+    }
+
+    template <ranges::input_range R, typename OutputIterator, typename Proj = std::identity,
+              typename Pred>
+    constexpr void operator()(R&& r, OutputIterator result, Pred pred, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::move(result), std::ref(pred),
+                          std::ref(proj));
+    }
+};
+
+inline constexpr copy_fn copy;
+inline constexpr copy_if_fn copy_if;
+
+//
+// generate
+//
+
+struct generate_fn {
+    template <typename Iterator, typename F>
+    constexpr Iterator operator()(Iterator first, Iterator last, F gen) const {
+        for (; first != last; *first = std::invoke(gen), ++first)
+            ;
+        return first;
+    }
+
+    template <typename R, std::copy_constructible F>
+    requires std::invocable<F&> && ranges::output_range<R>
+    constexpr ranges::iterator_t<R> operator()(R&& r, F gen) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::move(gen));
+    }
+};
+
+inline constexpr generate_fn generate;
+
+//
+// lower_bound, upper_bound
+//
+
+struct lower_bound_fn {
+    template <typename Iterator, typename T, typename Proj = std::identity,
+              typename Comp = ranges::less>
+    constexpr Iterator operator()(Iterator first, Iterator last, const T& value, Comp comp = {},
+                                  Proj proj = {}) const {
+        Iterator it;
+        std::ptrdiff_t _count, _step;
+        _count = std::distance(first, last);
+
+        while (_count > 0) {
+            it = first;
+            _step = _count / 2;
+            ranges::advance(it, _step, last);
+            if (comp(std::invoke(proj, *it), value)) {
+                first = ++it;
+                _count -= _step + 1;
+            } else {
+                _count = _step;
+            }
+        }
+        return first;
+    }
+
+    template <ranges::input_range R, typename T, typename Proj = std::identity,
+              typename Comp = ranges::less>
+    constexpr ranges::iterator_t<R> operator()(R&& r, const T& value, Comp comp = {},
+                                               Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), value, std::ref(comp), std::ref(proj));
+    }
+};
+
+struct upper_bound_fn {
+    template <typename Iterator, typename T, typename Proj = std::identity,
+              typename Comp = ranges::less>
+    constexpr Iterator operator()(Iterator first, Iterator last, const T& value, Comp comp = {},
+                                  Proj proj = {}) const {
+        Iterator it;
+        std::ptrdiff_t _count, _step;
+        _count = std::distance(first, last);
+
+        while (_count > 0) {
+            it = first;
+            _step = _count / 2;
+            ranges::advance(it, _step, last);
+            if (!comp(value, std::invoke(proj, *it))) {
+                first = ++it;
+                _count -= _step + 1;
+            } else {
+                _count = _step;
+            }
+        }
+        return first;
+    }
+
+    template <ranges::input_range R, typename T, typename Proj = std::identity,
+              typename Comp = ranges::less>
+    constexpr ranges::iterator_t<R> operator()(R&& r, const T& value, Comp comp = {},
+                                               Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), value, std::ref(comp), std::ref(proj));
+    }
+};
+
+inline constexpr lower_bound_fn lower_bound;
+inline constexpr upper_bound_fn upper_bound;
+
+//
+// adjacent_find
+//
+
+struct adjacent_find_fn {
+    template <typename Iterator, typename Proj = std::identity, typename Pred = ranges::equal_to>
+    constexpr Iterator operator()(Iterator first, Iterator last, Pred pred = {},
+                                  Proj proj = {}) const {
+        if (first == last)
+            return first;
+        auto _next = ranges::next(first);
+        for (; _next != last; ++_next, ++first)
+            if (std::invoke(pred, std::invoke(proj, *first), std::invoke(proj, *_next)))
+                return first;
+        return _next;
+    }
+
+    template <ranges::input_range R, typename Proj = std::identity,
+              typename Pred = ranges::equal_to>
+    constexpr ranges::iterator_t<R> operator()(R&& r, Pred pred = {}, Proj proj = {}) const {
+        return operator()(ranges::begin(r), ranges::end(r), std::ref(pred), std::ref(proj));
+    }
+};
+
+inline constexpr adjacent_find_fn adjacent_find;
+
+} // namespace ranges
+} // namespace std
+
+#endif