utils: Add thread-safe variants of dirname(3) and basename(3)

src/libstrongswan/utils/utils.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2008-2013 Tobias Brunner
+ * Copyright (C) 2008-2014 Tobias Brunner
  * Copyright (C) 2008 Martin Willi
  * Hochschule fuer Technik Rapperswil
  *
@@ -486,6 +486,32 @@ char *translate(char *str, const char *from, const char *to);
  */
 char *strreplace(const char *str, const char *search, const char *replace);
 
+/**
+ * Like dirname(3) returns the directory part of the given null-terminated
+ * pathname, up to but not including the final '/' (or '.' if no '/' is found).
+ * Trailing '/' are not counted as part of the pathname.
+ *
+ * The difference is that it does this in a thread-safe manner (i.e. it does not
+ * use static buffers) and does not modify the original path.
+ *
+ * @param path		original pathname
+ * @return			allocated directory component
+ */
+char *path_dirname(const char *path);
+
+/**
+ * Like basename(3) returns the filename part of the given null-terminated path,
+ * i.e. the part following the final '/' (or '.' if path is empty or NULL).
+ * Trailing '/' are not counted as part of the pathname.
+ *
+ * The difference is that it does this in a thread-safe manner (i.e. it does not
+ * use static buffers) and does not modify the original path.
+ *
+ * @param path		original pathname
+ * @return			allocated filename component
+ */
+char *path_basename(const char *path);
+
 /**
  * Creates a directory and all required parent directories.
  *