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+/*
+ * Copyright (C) 2023 Mikhail Burakov. This file is part of receiver.
+ *
+ * receiver 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.
+ *
+ * receiver 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 receiver. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef RECEIVER_UTIL_H_
+#define RECEIVER_UTIL_H_
+
+#define STR_IMPL(x) #x
+#define STR(x) STR_IMPL(x)
+#define LOG(fmt, ...) \
+ fprintf(stderr, __FILE__ ":" STR(__LINE__) " " fmt "\n", ##__VA_ARGS__)
+#define AUTO(x) x __attribute__((__cleanup__(x##Destroy)))
+#define SWAP(a, b) Swap((void**)&a, (void**)&b)
+#define RELEASE(x) Release((void**)&x)
+#define LENGTH(x) (sizeof(x) / sizeof *(x))
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#define MIN(a, b) ((a) < (b) ? (a) : (b))
+
+static inline void Swap(void** a, void** b) {
+ void* temp = *a;
+ *a = *b;
+ *b = temp;
+}
+
+static inline void* Release(void** x) {
+ void* result = *x;
+ *x = 0;
+ return result;
+}
+
+#endif // RECEIVER_UTIL_H_