* \brief Common and handy function macros
*/
-/*
- * $Log$
- * Revision 1.1 2004/08/14 19:37:57 rasky
- * Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc.
- *
- * Revision 1.4 2004/08/14 18:36:50 rasky
- * Doxygen fix e un livello di parentesi aggiuntivi per la macro
- *
- * Revision 1.3 2004/08/12 20:01:32 rasky
- * Aggiunte macro BIT_CHANGE e BIT_CHANGE_BV
- *
- * Revision 1.2 2004/08/10 21:36:14 rasky
- * Aggiunto include macros.h dove serve
- * Aggiunta dipendenza da compiler.h in macros.h
- *
- * Revision 1.1 2004/08/10 21:30:00 rasky
- * Estratte le funzioni macro in macros.h
- *
- */
+/*#*
+ *#* $Log$
+ *#* Revision 1.5 2004/08/29 21:57:58 bernie
+ *#* Move back STATIC_ASSERT() to compiler.h as it's needed in cpu.h;
+ *#* iptr_t, const_iptr_t: Replace IPTR macro with a real typedef.
+ *#*
+ *#* Revision 1.3 2004/08/24 14:13:48 bernie
+ *#* Restore a few macros that were lost in the way.
+ *#*
+ *#* Revision 1.2 2004/08/24 13:32:14 bernie
+ *#* PP_CAT(), PP_STRINGIZE(): Move back to compiler.h to break circular dependency between cpu.h/compiler.h/macros.h;
+ *#* offsetof(), countof(): Move back to compiler.h to avoid including macros.h almost everywhere;
+ *#* Trim CVS log;
+ *#* Rename header guards;
+ *#* Don't include arch_config.h in compiler.h as it's not needed there.
+ *#*
+ *#* Revision 1.1 2004/08/14 19:37:57 rasky
+ *#* Merge da SC: macros.h, pool.h, BIT_CHANGE, nome dei processi, etc.
+ *#*
+ *#* Revision 1.4 2004/08/14 18:36:50 rasky
+ *#* Doxygen fix e un livello di parentesi aggiuntivi per la macro
+ *#*
+ *#* Revision 1.3 2004/08/12 20:01:32 rasky
+ *#* Aggiunte macro BIT_CHANGE e BIT_CHANGE_BV
+ *#*
+ *#* Revision 1.2 2004/08/10 21:36:14 rasky
+ *#* Aggiunto include macros.h dove serve
+ *#* Aggiunta dipendenza da compiler.h in macros.h
+ *#*
+ *#* Revision 1.1 2004/08/10 21:30:00 rasky
+ *#* Estratte le funzioni macro in macros.h
+ *#*
+ *#*/
#ifndef MACROS_H
#define MACROS_H
#include <compiler.h>
-/* Quasi-ANSI macros */
-#ifndef offsetof
- /*! offsetof(s,m) - Return the byte offset of the member \a m in struct \a s */
- #define offsetof(s,m) (size_t)&(((s *)0)->m)
-#endif
-#ifndef countof
- /*! Count the number of elements in the static array \a a */
- #define countof(a) (sizeof(a) / sizeof(*(a)))
-#endif
-
-
-/* Simple macros */
-#define ABS(a) (((a) < 0) ? -(a) : (a))
-#define MIN(a,b) (((a) < (b)) ? (a) : (b))
-#define MAX(a,b) (((a) > (b)) ? (a) : (b))
+/* Type-generic macros */
+#if GNUC_PREREQ(2,0)
+ #define ABS(n) ({ \
+ __typeof__(n) _n = (n); \
+ (_n < 0) ? -_n : _n; \
+ })
+ #define MIN(a,b) ({ \
+ __typeof__(a) _a = (a); \
+ __typeof__(b) _b = (b); \
+ (void)(&_a == &_b); /* ensure same type */ \
+ (_a < _b) ? _a : _b; \
+ })
+ #define MAX(a,b) ({ \
+ __typeof__(a) _a = (a); \
+ __typeof__(b) _b = (b); \
+ (void)(&_a == &_b); /* ensure same type */ \
+ (_a > _b) ? _a : _b; \
+ })
+#else /* !GNUC */
+ /* Buggy macros for inferior compilers. */
+ #define ABS(a) (((a) < 0) ? -(a) : (a))
+ #define MIN(a,b) (((a) < (b)) ? (a) : (b))
+ #define MAX(a,b) (((a) > (b)) ? (a) : (b))
+#endif /* !GNUC */
#ifndef BV
/*! Convert a bit value to a binary flag */
#define UINT32_LOG2(x) \
((x < 65536UL) ? UINT16_LOG2(x) : UINT16_LOG2((x) >> 16) + 16)
-/*! Concatenate two different preprocessor tokens (allowing macros to expand) */
-#define PP_CAT(x,y) PP_CAT__(x,y)
-#define PP_CAT__(x,y) x ## y
-#define PP_CAT3(x,y,z) PP_CAT(PP_CAT(x,y),z)
-#define PP_CAT4(x,y,z,w) PP_CAT(PP_CAT3(x,y,z),w)
-#define PP_CAT5(x,y,z,w,j) PP_CAT(PP_CAT4(x,y,z,w),j)
-
-/*! String-ize a token (allowing macros to expand) */
-#define PP_STRINGIZE(x) PP_STRINGIZE__(x)
-#define PP_STRINGIZE__(x) #x
-
#if COMPILER_C99
/*! Count the number of arguments (up to 16) */
#define PP_COUNT(...) \
count
#endif
-/*! Issue a compilation error if the \a condition is false */
-#define STATIC_ASSERT(condition) \
- extern char CT_ASSERT___[(condition) ? 1 : -1]
-
-
#if COMPILER_C99
/*!
* \def BIT_CHANGE(reg, (mask, value), ...)