-// ----------------------------------------------------------------------------
-// $Id$
-// ----------------------------------------------------------------------------
-// Public Domain C Library - http://pdclib.sourceforge.net
-// This code is Public Domain. Use, modify, and redistribute at will.
-// ----------------------------------------------------------------------------
-// Provides the debug macro assert().
-// ----------------------------------------------------------------------------
-
-#ifndef __ASSERT_H
-#define __ASSERT_H __ASSERT_H
-
-// ----------------------------------------------------------------------------
-// AUXILIARY
-
-// Helper function doing the print to stderr and call to abort().
-void __assert( char const * const expression, // the tested expression
- char const * const file, // name of source file
- char const * const function, // name of function
- int const line ); // number of source file line
-
-// ----------------------------------------------------------------------------
-// DEFINES
-
-// TODO: <void expression> is given as (void) 0, which might give a "C style
-// cast" warning under C++. Find a void expression that does not give warnings.
-
-// TODO: Check the macro for if-compatibility.
+/* ----------------------------------------------------------------------------
+ * $Id$
+ * ----------------------------------------------------------------------------
+ * Public Domain C Library - http://pdclib.sourceforge.net
+ * This code is Public Domain. Use, modify, and redistribute at will.
+ * ----------------------------------------------------------------------------
+ * Diagnostics
+ * --------------------------------------------------------------------------*/
+
+#ifndef _ASSERT_H
+#define _ASSERT_H _ASSERT_H
+
+/* ----------------------------------------------------------------------------
+ * AUXILIARY
+ * --------------------------------------------------------------------------*/
+
+/* Helper function doing the print to stderr and call to abort(). */
+void __assert( char const * const expression, /* the tested expression */
+ char const * const file, /* name of source file */
+ char const * const function, /* name of function */
+ int const line ); /* number of source file line */
+
+#endif /* _ASSERT_H - note that the header guard ends here on purpose. The
+ assert macro is redefined upon each inclusion, in
+ dependence of NDEBUG. */
+
+/* ----------------------------------------------------------------------------
+ * DEFINES
+ * --------------------------------------------------------------------------*/