/* intprops.h -- properties of integer types
- Copyright (C) 2001, 2002, 2003, 2004, 2005, 2009 Free Software
+ Copyright (C) 2001, 2002, 2003, 2004, 2005, 2009, 2010 Free Software
Foundation, Inc.
This program is free software: you can redistribute it and/or modify
# define signed_type_or_expr__(t) 1
# endif
+/* Bound on length of the string representing an unsigned integer
+ value representable in B bits. log10 (2.0) < 146/485. The
+ smallest value of B where this bound is not tight is 2621. */
+# define INT_BITS_STRLEN_BOUND(b) (((b) * 146 + 484) / 485)
+
/* Bound on length of the string representing an integer type or expression T.
- Subtract 1 for the sign bit if T is signed; log10 (2.0) < 146/485;
- add 1 for integer division truncation; add 1 more for a minus sign
- if needed. */
+ Subtract 1 for the sign bit if T is signed, and then add 1 more for
+ a minus sign if needed. */
# define INT_STRLEN_BOUND(t) \
- ((sizeof (t) * CHAR_BIT - signed_type_or_expr__ (t)) * 146 / 485 \
- + signed_type_or_expr__ (t) + 1)
+ (INT_BITS_STRLEN_BOUND (sizeof (t) * CHAR_BIT - signed_type_or_expr__ (t)) \
+ + signed_type_or_expr__ (t))
/* Bound on buffer size needed to represent an integer type or expression T,
including the terminating null. */