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$NetBSD: patch-ah,v 1.1 2006/12/19 07:53:57 wiz Exp $
safer DIGIT_STR_LEN().
http://mlterm.cvs.sourceforge.net/mlterm/mlterm/kiklib/src/kik_util.h?r1=1.4&r2=1.5&view=patch
--- kiklib/src/kik_util.h.orig 2002/02/02 09:20:27 1.4
+++ kiklib/src/kik_util.h 2006/10/13 16:13:42 1.5
@@ -10,19 +10,20 @@
#define K_MIN(n1,n2) ((n1) > (n2) ? (n2) : (n1))
-/*
- * char : 0 - 256 (3)
- * int16 : 0 - 65536 (5)
- * int32 : 0 - 4294967296 (10)
- * int64 : 0 - 18446744073709551616 (20)
+/* TYPE: MIN(signed) -- MAX(unsigned) (number of bytes needed)
+ * char : -128 -- 256 (4)
+ * int16 : -32768 -- 65536 (6)
+ * int32 : -2147483648 -- 4294967296 (11)
+ * int64 : -9223372036854775808 -- 18446744073709551616 (20)
*
- * 40 is evenly selected in other cases just to be sure.
+ * Since log10(2^8) = 2.4..., (sizeof(n)*3) is large enough
+ * for all n >= 2.
*/
#define DIGIT_STR_LEN(n) \
- ((sizeof(n) == 1) ? 3 : \
- (sizeof(n) == 2) ? 5 : \
- (sizeof(n) == 4) ? 10 : \
- (sizeof(n) == 8) ? 20 : 40)
+ ((sizeof(n) == 1) ? 4 : \
+ (sizeof(n) == 2) ? 6 : \
+ (sizeof(n) == 4) ? 11 : \
+ (sizeof(n) == 8) ? 20 : (sizeof(n)*3))
#endif
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