X-Git-Url: https://pd.if.org/git/?a=blobdiff_plain;f=internals%2F_PDCLIB_aux.h;h=8f1cb7fee61dbcbd78ddef3bd7ce3c9e85b3b0b7;hb=be738e08ec9ba2498d81153bee1de9b8af7e764c;hp=bc13897a7d4254383cc3890499c69ba7459f4a09;hpb=28f6edc984f962ed33ac4fb505cf94b3e78f3f6d;p=pdclib

diff --git a/internals/_PDCLIB_aux.h b/internals/_PDCLIB_aux.h
index bc13897..8f1cb7f 100644
--- a/internals/_PDCLIB_aux.h
+++ b/internals/_PDCLIB_aux.h
@@ -1,12 +1,12 @@
-#ifndef _PDCLIB_AUX_H
-#define _PDCLIB_AUX_H
-
 /* 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).         */
@@ -62,12 +62,8 @@
 #endif
 
 #ifdef __cplusplus
-    #define _PDCLIB_BEGIN_EXTERN_C extern "C" {
-    #define _PDCLIB_END_EXTERN_C }
     typedef bool _PDCLIB_bool;
 #else
-    #define _PDCLIB_BEGIN_EXTERN_C
-    #define _PDCLIB_END_EXTERN_C
     typedef _Bool _PDCLIB_bool;
 #endif
 
@@ -96,7 +92,7 @@
 #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
@@ -181,6 +177,15 @@
     #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
@@ -224,6 +229,14 @@
     #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*/
@@ -232,11 +245,18 @@
 /* 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 )