@@ -40,6 +40,7 @@

  * 2005-11-29 reverse_hex2int/int2reverse_hex switched to unsigned int (andrei)

  * 2005-12-09 added msgid_var (andrei)

  * 2007-05-14 added get_sys_ver() (andrei)

+ * 2007-06-05 added MAX_UVAR_VALUE(), MAX_int(a,b) MIN_int(a,b) (andrei)

  */

@@ -117,6 +118,27 @@

 #define ROUND_SHORT(s) ROUND2TYPE(s, short)

+/* params: v - either a variable name, structure member or a type

+ * returns an unsigned long containing the maximum possible value that will

+ * fit in v, if v is unsigned or converted to an unsigned version

+ * example: MAX_UVAR_VALUE(unsigned short); MAX_UVAR_VALUE(i);

+ *  MAX_UVAR_VALUE(((struct foo*)0)->bar) */

+#define MAX_UVAR_VALUE(v) \

+	(((unsigned long)(-1))>>((sizeof(unsigned long)-sizeof(v))*8UL))

+

+

+#define MIN_int(a, b) (((a)<(b))?(a):(b))

+#define MAX_int(a, b) (((a)>(b))?(a):(b))

+

+#if 0

+#define MIN_int(a, b) ((b)+(((a)-(b))& -((a)<(b))))

+#define MAX_int(a, b) ((a)-(((a)-(b))& -((b)>(a))))

+

+/* depend on signed right shift result which depends on the compiler */

+#define MIN_int(a, b) ((b)+(((a)-(b))&(((a)-(b))>>(sizeof(int)*8-1))))

+#define MAX_int(a, b) ((a)-(((a)-(b))&(((a)-(b))>>(sizeof(int)*8-1))))

+#endif

+

 /* links a value to a msgid */

 struct msgid_var{