Static assert macro, config sanity checks
authorMartin Baute <solar@rootdirectory.de>
Mon, 7 Mar 2016 07:14:18 +0000 (08:14 +0100)
committerMartin Baute <solar@rootdirectory.de>
Mon, 7 Mar 2016 07:14:18 +0000 (08:14 +0100)
includes/assert.h
internals/_PDCLIB_aux.h
internals/_PDCLIB_int.h

index 349c866f05ccde2664460bd164311d12d5f5d5eb..e2618a0e964a32ec5e947acf4aafc2ccb5d2fcde 100644 (file)
@@ -30,6 +30,12 @@ _PDCLIB_BEGIN_EXTERN_C
 void _PDCLIB_assert99( char const * const, char const * const, char const * const );
 void _PDCLIB_assert89( char const * const );
 
+#if _PDCLIB_C_VERSION >= 2011
+#define static_assert _Static_assert
+#else
+#define static_assert( e, m )
+#endif
+
 #endif
 
 /* If NDEBUG is set, assert() is a null operation. */
index 484e930f24618c24fbee7dc563835e441ceeed35..16e7ed86ce0353b1055da508ed65702eb0125900 100644 (file)
 /* 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 )
index c200419e6133a0235fd92448066744cdf83db6d6..43ef73900a15caa0dad6e1bd6f0649bca4fbc1dd 100644 (file)
@@ -309,6 +309,22 @@ _PDCLIB_uintmax_t _PDCLIB_strtox_main( const char ** p, unsigned int base, _PDCL
 extern char _PDCLIB_digits[];
 extern char _PDCLIB_Xdigits[];
 
+/* -------------------------------------------------------------------------- */
+/* Sanity checks                                                              */
+/* -------------------------------------------------------------------------- */
+
+#if _PDCLIB_C_VERSION >= 2011
+_Static_assert( sizeof( short ) == _PDCLIB_SHRT_BYTES, "_PDCLIB_SHRT_BYTES incorrectly defined, check _PDCLIB_config.h" );
+_Static_assert( sizeof( int ) == _PDCLIB_INT_BYTES, "_PDCLIB_INT_BYTES incorrectly defined, check _PDCLIB_config.h" );
+_Static_assert( sizeof( long ) == _PDCLIB_LONG_BYTES, "_PDCLIB_LONG_BYTES incorrectly defined, check _PDCLIB_config.h" );
+_Static_assert( sizeof( long long ) == _PDCLIB_LLONG_BYTES, "_PDCLIB_LLONG_BYTES incorrectly defined, check _PDCLIB_config.h" );
+_Static_assert( ( (char)-1 < 0 ) == _PDCLIB_CHAR_SIGNED, "_PDCLIB_CHAR_SIGNED incorrectly defined, check _PDCLIB_config.h" );
+_Static_assert( sizeof( _PDCLIB_wchar ) == sizeof( L'x' ), "_PDCLIB_wchar incorrectly defined, check _PDCLIB_config.h" );
+_Static_assert( sizeof( void * ) == sizeof( _PDCLIB_intptr ), "_PDCLIB_intptr incorrectly defined, check _PDCLIB_config.h" );
+_Static_assert( sizeof( sizeof( 1 ) ) == sizeof( _PDCLIB_size ), "_PDCLIB_size incorrectly defined, check _PDCLIB_config.h" );
+_Static_assert( sizeof( &_PDCLIB_digits[1] - &_PDCLIB_digits[0] ) == sizeof( _PDCLIB_ptrdiff ), "_PDCLIB_ptrdiff incorrectly defined, check _PDCLIB_config.h" );
+#endif
+
 /* -------------------------------------------------------------------------- */
 /* locale / wchar / uchar                                                     */
 /* -------------------------------------------------------------------------- */