From 83d5ba42f8a98fc0df177efef4333f74a0481f61 Mon Sep 17 00:00:00 2001
From: pants <niklasjo2004@gmail.com>
Date: Mon, 21 Sep 2026 14:18:06 -0700
Subject: init

---
 include/util/ptr.hpp | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 53 insertions(+)
 create mode 100644 include/util/ptr.hpp

(limited to 'include/util/ptr.hpp')

diff --git a/include/util/ptr.hpp b/include/util/ptr.hpp
new file mode 100644
index 0000000..0e8be3f
--- /dev/null
+++ b/include/util/ptr.hpp
@@ -0,0 +1,53 @@
+// Display images inside a terminal
+// Copyright (C) 2023  JustKidding
+//
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// This program is distributed in the hope that 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 <https://www.gnu.org/licenses/>.
+
+#ifndef UTIL_PTR_H
+#define UTIL_PTR_H
+
+#include <memory>
+
+template <auto fn>
+struct deleter_from_fn {
+    template <typename T>
+    constexpr void operator()(T *arg) const
+    {
+        fn(const_cast<std::remove_const_t<T> *>(arg));
+    }
+};
+
+template <auto fn>
+struct deleter_from_fn_null {
+    template <typename T>
+    constexpr void operator()(T *arg) const
+    {
+        if (arg != nullptr) {
+            fn(const_cast<std::remove_const_t<T> *>(arg));
+        }
+    }
+};
+
+// custom unique pointer
+template <typename T, auto fn>
+using c_unique_ptr = std::unique_ptr<T, deleter_from_fn<fn>>;
+
+// custom unique pointer that checks for null before deleting
+template <typename T, auto fn>
+using cn_unique_ptr = std::unique_ptr<T, deleter_from_fn_null<fn>>;
+
+template <typename T>
+using unique_C_ptr = std::unique_ptr<T, deleter_from_fn<std::free>>;
+
+#endif
-- 
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