-#ifndef _PDCLIB_AUX_H
-#define _PDCLIB_AUX_H
+#ifndef __PDCLIB_AUX_H
+#define __PDCLIB_AUX_H __PDCLIB_AUX_H
/* Auxiliary PDCLib code <_PDCLIB_aux.h>
#endif
#ifdef __has_attribute
- #define _PDCLIB_HAS_ATTRIBUTE(x) __has_builtin(x)
+ #define _PDCLIB_HAS_ATTRIBUTE(x) __has_attribute(x)
#else
#define _PDCLIB_HAS_ATTRIBUTE(x) (0)
#endif
#define _PDCLIB_DEPRECATED __attribute__ ((__deprecated__))
#endif
+#if !defined(_PDCLIB_UNREACHABLE) && _PDCLIB_GCC_BUILTIN(__builtin_unreachable, 4, 0)
+ #define _PDCLIB_UNREACHABLE __builtin_unreachable()
+#endif
+
+#if !defined(_PDCLIB_UNDEFINED) && defined(__GNUC__)
+ #define _PDCLIB_UNDEFINED(_var) \
+ do { __asm__("" : "=X"(_var)); } while(0)
+#endif
+
/* No-op fallbacks */
#ifndef _PDCLIB_nothrow
#define _PDCLIB_DEPRECATED
#endif
+#ifndef _PDCLIB_UNREACHABLE
+ #define _PDCLIB_UNREACHABLE do {} while(0)
+#endif
+
+#ifndef _PDCLIB_UNDEFINED
+ #define _PDCLIB_UNDEFINED(_var) do {} while(0)
+#endif
+
/*#if _PDCLIB_C_VERSION != 1999
#error PDCLib might not be fully conforming to either C89 or C95 prior to v2.x.
#endif*/
/* Helper macros: */
/* _PDCLIB_cc( x, y ) concatenates two preprocessor tokens without extending */
/* _PDCLIB_concat( x, y ) concatenates two preprocessor tokens with extending */
+/* _PDCLIB_concat3( x, y, z ) is the same for three tokens */
+/* _PDCLIB_static_assert( x ) provides a compile-time check mechanism */
/* -------------------------------------------------------------------------- */
#define _PDCLIB_cc( x, y ) x ## y
#define _PDCLIB_concat( x, y ) _PDCLIB_cc( x, y )
#define _PDCLIB_concat3( x, y, z ) _PDCLIB_concat( _PDCLIB_concat( x, y ), z )
+#if _PDCLIB_C_VERSION >= 2011
+#define _PDCLIB_static_assert _Static_assert
+#else
+#define _PDCLIB_static_assert( e, m ) ;enum { _PDCLIB_concat( _PDCLIB_assert_, __LINE__ ) = 1 / ( !!( e ) ) }
+#endif
#define _PDCLIB_symbol2value( x ) #x
#define _PDCLIB_symbol2string( x ) _PDCLIB_symbol2value( x )