Initial import, still work in progress

1 files changed, 58 insertions, 0 deletions

diff --git a/util.h b/util.h
new file mode 100644
index 0000000..8a21467
--- /dev/null
+++ b/util.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2014-2015 Tobias Klauser <tklauser@distanz.ch>
+ * Copyright (C) 2009-2012 Daniel Borkmann
+ *
+ * This file is part of llmnrd.
+ *
+ * llmnrd 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, version 2 of the License.
+ *
+ * llmnrd 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 llmnrd.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef UTIL_H
+#define UTIL_H
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "compiler.h"
+
+#define ARRAY_SIZE(x)	(sizeof(x) / sizeof((x)[0]))
+
+/*
+ * min() macro with strict type-checking.
+ * Taken from linux/kernel.h
+ */
+#undef min
+#define min(x, y) ({			\
+	typeof(x) _min1 = (x);		\
+	typeof(y) _min2 = (y);		\
+	(void) (&_min1 == &_min2);	\
+	_min1 < _min2 ? _min1 : _min2; })
+
+static inline void __noreturn panic(const char *fmt, ...)
+{
+	va_list vl;
+
+	va_start(vl, fmt);
+	vfprintf(stderr, fmt, vl);
+	va_end(vl);
+
+	exit(EXIT_FAILURE);
+}
+
+void *xmalloc(size_t size);
+void *xzalloc(size_t size);
+void *xrealloc(void *ptr, size_t size);
+char *xstrdup(const char *s);
+
+#endif /* UTIL_H */