strat: split out common functionality for future meso use

2019-10-25 00:12:47 -07:00
parent 8cb77ac136
commit d7a06057eb
340 changed files with 255 additions and 1080 deletions
--- a/stratosphere/libstratosphere/include/atmosphere/util/util_parent_of_member.hpp
+++ b/stratosphere/libstratosphere/include/atmosphere/util/util_parent_of_member.hpp
@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2018-2019 Atmosphère-NX
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+#include "../defines.hpp"
+
+namespace ams::util {
+
+    namespace impl {
+
+        template<typename Parent, typename Member>
+        union OffsetOfImpl {
+            Member Parent::* ptr;
+            intptr_t offset;
+        };
+
+        template<typename Parent, typename Member>
+        constexpr inline Parent *GetParentOfMemberImpl(Member *member, Member Parent::* ptr) {
+            return reinterpret_cast<Parent *>(reinterpret_cast<uintptr_t>(member) - OffsetOfImpl<Parent, Member>{ ptr }.offset);
+        }
+
+        template<typename Parent, typename Member>
+        constexpr inline Parent const *GetParentOfMemberImpl(Member const *member, Member Parent::* ptr) {
+            return reinterpret_cast<Parent *>(reinterpret_cast<uintptr_t>(member) - OffsetOfImpl<Parent, Member>{ ptr }.offset);
+        }
+
+        template<typename T>
+        struct GetMemberPointerTraits;
+
+        template<typename P, typename M>
+        struct GetMemberPointerTraits<M P::*> {
+            using Parent = P;
+            using Member = M;
+        };
+
+        template<auto MemberPtr>
+        using GetParentType = typename GetMemberPointerTraits<decltype(MemberPtr)>::Parent;
+
+        template<auto MemberPtr>
+        using GetMemberType = typename GetMemberPointerTraits<decltype(MemberPtr)>::Member;
+
+    }
+
+    template<auto MemberPtr>
+    constexpr inline impl::GetParentType<MemberPtr> *GetParentPointer(impl::GetMemberType<MemberPtr> *member) {
+        return impl::GetParentOfMemberImpl<impl::GetParentType<MemberPtr>, impl::GetMemberType<MemberPtr>>(member, MemberPtr);
+    }
+
+    template<auto MemberPtr>
+    constexpr inline impl::GetParentType<MemberPtr> const *GetParentPointer(impl::GetMemberType<MemberPtr> const *member) {
+        return impl::GetParentOfMemberImpl<impl::GetParentType<MemberPtr>, impl::GetMemberType<MemberPtr>>(member, MemberPtr);
+    }
+
+    template<auto MemberPtr>
+    constexpr inline impl::GetParentType<MemberPtr> &GetParentReference(impl::GetMemberType<MemberPtr> *member) {
+        return *impl::GetParentOfMemberImpl<impl::GetParentType<MemberPtr>, impl::GetMemberType<MemberPtr>>(member, MemberPtr);
+    }
+
+    template<auto MemberPtr>
+    constexpr inline impl::GetParentType<MemberPtr> const &GetParentReference(impl::GetMemberType<MemberPtr> const *member) {
+        return *impl::GetParentOfMemberImpl<impl::GetParentType<MemberPtr>, impl::GetMemberType<MemberPtr>>(member, MemberPtr);
+    }
+
+}