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Diffstat (limited to 'time')
-rw-r--r--time/mktime.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/time/mktime.c b/time/mktime.c
index 5144987708..652a0f2d4a 100644
--- a/time/mktime.c
+++ b/time/mktime.c
@@ -104,12 +104,8 @@ verify (long_int_is_wide_enough, INT_MAX == INT_MAX * (long_int) 2 / 2);
 #define TYPE_IS_INTEGER(t) ((t) 1.5 == 1)
 
 /* True if negative values of the signed integer type T use two's
-   complement, ones' complement, or signed magnitude representation,
-   respectively.  Much GNU code assumes two's complement, but some
-   people like to be portable to all possible C hosts.  */
+   complement, or if T is an unsigned integer type.  */
 #define TYPE_TWOS_COMPLEMENT(t) ((t) ~ (t) 0 == (t) -1)
-#define TYPE_ONES_COMPLEMENT(t) ((t) ~ (t) 0 == 0)
-#define TYPE_SIGNED_MAGNITUDE(t) ((t) ~ (t) 0 < (t) -1)
 
 /* True if the arithmetic type T is signed.  */
 #define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
@@ -121,9 +117,7 @@ verify (long_int_is_wide_enough, INT_MAX == INT_MAX * (long_int) 2 / 2);
 #define TYPE_MINIMUM(t) \
   ((t) (! TYPE_SIGNED (t) \
 	? (t) 0 \
-	: TYPE_SIGNED_MAGNITUDE (t) \
-	? ~ (t) 0 \
-	: ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))
+	: ~ TYPE_MAXIMUM (t)))
 #define TYPE_MAXIMUM(t) \
   ((t) (! TYPE_SIGNED (t) \
 	? (t) -1 \
@@ -138,7 +132,10 @@ verify (long_int_is_wide_enough, INT_MAX == INT_MAX * (long_int) 2 / 2);
 #define TIME_T_MIDPOINT (SHR (TIME_T_MIN + TIME_T_MAX, 1) + 1)
 
 verify (time_t_is_integer, TYPE_IS_INTEGER (time_t));
-verify (twos_complement_arithmetic, TYPE_TWOS_COMPLEMENT (int));
+verify (twos_complement_arithmetic,
+	(TYPE_TWOS_COMPLEMENT (int)
+	 && TYPE_TWOS_COMPLEMENT (long_int)
+	 && TYPE_TWOS_COMPLEMENT (time_t)));
 
 #define EPOCH_YEAR 1970
 #define TM_YEAR_BASE 1900