-/* $Id$ */
-
-/* Release $Name$ */
-
/* Auxiliary PDCLib code <_PDCLIB_aux.h>
This file is part of the Public Domain C Library (PDCLib).
Permission is granted to use, modify, and / or redistribute at will.
*/
+#ifndef _PDCLIB_AUX_H
+#define _PDCLIB_AUX_H _PDCLIB_AUX_H
+
+/* -------------------------------------------------------------------------- */
+/* You should not have to edit anything in this file; if you DO have to, it */
+/* would be considered a bug / missing feature: notify the author(s). */
+/* -------------------------------------------------------------------------- */
+
/* -------------------------------------------------------------------------- */
/* Standard Version */
/* -------------------------------------------------------------------------- */
#error Compiler does not define _ _STDC_ _ to 1 (not standard-compliant)!
#endif
-#ifndef __STDC_VERSION__
-#define _PDCLIB_C_VERSION 90
-#define _PDCLIB_restrict
-#define _PDCLIB_inline
-#elif __STDC_VERSION__ == 199409L
-#define _PDCLIB_C_VERSION 95
+#if __STDC_VERSION__ < 199901L
#define _PDCLIB_restrict
#define _PDCLIB_inline
-#elif __STDC_VERSION__ == 199901L
-#define _PDCLIB_C_VERSION 99
+#error PDCLib might not be fully conforming to either C89 or C95 prior to v2.x.
+#else
#define _PDCLIB_restrict restrict
#define _PDCLIB_inline inline
-#else
-#error Unsupported _ _STDC_VERSION_ _ (__STDC_VERSION__) (supported: ISO/IEC 9899:1990, 9899/AMD1:1995, and 9899:1999).
#endif
#ifndef __STDC_HOSTED__
#error Compiler does not define _ _STDC_HOSTED_ _ to 0 or 1 (not standard-compliant)!
#endif
-#if _PDCLIB_C_VERSION != 99
-#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_static_assert( e, m ) does a compile-time assertion of expression */
+/* e, with m as the failure message. */
/* -------------------------------------------------------------------------- */
#define _PDCLIB_cc( x, y ) x ## y
#define _PDCLIB_concat( x, y ) _PDCLIB_cc( x, y )
+#define _PDCLIB_static_assert( e, m ) enum { _PDCLIB_concat( _PDCLIB_assert_, __LINE__ ) = 1 / ( !!(e) ) }
+
#define _PDCLIB_symbol2value( x ) #x
#define _PDCLIB_symbol2string( x ) _PDCLIB_symbol2value( x )
-#define _PDCLIB_symbol2identity( x ) x
+
+#endif