+2000-10-15 Joseph S. Myers <jsm28@cam.ac.uk>
+
+ * gcc.dg/c90-printf-2.c, gcc.dg/c90-scanf-2.c: Determine the type
+ for intmax_t in the compiler using __typeof__ and the type rules
+ for conditional expressions.
+
2000-10-13 Jakub Jelinek <jakub@redhat.com>
* gcc.dg/20001012-1.c: New test.
/* This next definition is a kludge. When GCC has a <stdint.h> it
should be used.
*/
-#include <limits.h>
-#if INT_MAX == __LONG_LONG_MAX__
-typedef int intmax_t;
-#elif LONG_MAX == __LONG_LONG_MAX__
-typedef long intmax_t;
-#else
-__extension__ typedef long long intmax_t;
-#endif
+/* (T *) if E is zero, (void *) otherwise. */
+#define type_if_not(T, E) __typeof__(0 ? (T *)0 : (void *)(E))
+
+/* (T *) if E is nonzero, (void *) otherwise. */
+#define type_if(T, E) type_if_not(T, !(E))
+
+/* Combine pointer types, all but one (void *). */
+#define type_comb2(T1, T2) __typeof__(0 ? (T1)0 : (T2)0)
+#define type_comb3(T1, T2, T3) type_comb2(T1, type_comb2(T2, T3))
+
+#define maybe_int_ptr type_if(int, sizeof(int) == sizeof(llong))
+#define maybe_long_ptr type_if(long, sizeof(long) == sizeof(llong) && sizeof(long) > sizeof(int))
+#define maybe_long_long_ptr type_if(llong, sizeof(llong) > sizeof(long))
+
+#define intmax_type_ptr type_comb3(maybe_int_ptr, maybe_long_ptr, maybe_long_long_ptr)
+
+typedef __typeof__(*((intmax_type_ptr)0)) intmax_t;
extern int printf (const char *, ...);
/* This next definition is a kludge. When GCC has a <stdint.h> it
should be used.
*/
-#include <limits.h>
-#if INT_MAX == __LONG_LONG_MAX__
-typedef int intmax_t;
-#elif LONG_MAX == __LONG_LONG_MAX__
-typedef long intmax_t;
-#else
-__extension__ typedef long long intmax_t;
-#endif
+/* (T *) if E is zero, (void *) otherwise. */
+#define type_if_not(T, E) __typeof__(0 ? (T *)0 : (void *)(E))
+
+/* (T *) if E is nonzero, (void *) otherwise. */
+#define type_if(T, E) type_if_not(T, !(E))
+
+/* Combine pointer types, all but one (void *). */
+#define type_comb2(T1, T2) __typeof__(0 ? (T1)0 : (T2)0)
+#define type_comb3(T1, T2, T3) type_comb2(T1, type_comb2(T2, T3))
+
+#define maybe_int_ptr type_if(int, sizeof(int) == sizeof(llong))
+#define maybe_long_ptr type_if(long, sizeof(long) == sizeof(llong) && sizeof(long) > sizeof(int))
+#define maybe_long_long_ptr type_if(llong, sizeof(llong) > sizeof(long))
+
+#define intmax_type_ptr type_comb3(maybe_int_ptr, maybe_long_ptr, maybe_long_long_ptr)
+
+typedef __typeof__(*((intmax_type_ptr)0)) intmax_t;
extern int scanf (const char *, ...);