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+/*
+ * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch>
+ *
+ * This file is part of nios2sim-ng.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#ifndef _UTIL_H_
+#define _UTIL_H_
+
+#include <string.h>
+
+/*
+ * Memory allocation
+ */
+
+extern void *zalloc(const size_t size);
+
+/*
+ * String handling and manipulation
+ */
+
+/**
+ * Check whether two strings match exactly.
+ *
+ * @param ctx  the reference string (usually a defined constant or string under
+ *             the programs control)
+ * @param arg  the string to match against the reference string (usually the
+ *             user-supplied string)
+ * @return     true if the strings match
+ */
+static inline bool xstrmatch(const char *ctx, const char *arg)
+{
+	size_t len = strlen(ctx);
+	return (strlen(arg) == len && strncmp(arg, ctx, len) == 0);
+}
+
+/**
+ * Check whether a string is empty (either NULL or empty string).
+ *
+ * @param str  string to check for emptiness
+ * @return     true if the string is empty
+ */
+static inline bool xstrisempty(const char *str)
+{
+	return ((str == NULL) || (xstrmatch("", str)));
+}
+
+
+/*
+ * Stringification macro (taken from Linux Kernel source code)
+ */
+
+/* Indirect stringification.  Doing two levels allows the parameter to be a
+ * macro itself.  For example, compile with -DFOO=bar, __stringify(FOO)
+ * converts to "bar".
+ */
+
+#define __stringify_1(x...)	#x
+#define __stringify(x...)	__stringify_1(x)
+
+#endif /* _UTIL_H_ */