diff options
Diffstat (limited to 'tests/intprops.h')
| -rw-r--r-- | tests/intprops.h | 50 |
1 files changed, 28 insertions, 22 deletions
diff --git a/tests/intprops.h b/tests/intprops.h index 002161ee..46f4d47d 100644 --- a/tests/intprops.h +++ b/tests/intprops.h @@ -1,6 +1,7 @@ /* intprops.h -- properties of integer types - Copyright (C) 2001, 2002, 2003, 2004, 2005 Free Software Foundation, Inc. + 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 it under the terms of the GNU General Public License as published by @@ -17,40 +18,43 @@ /* Written by Paul Eggert. */ -#include <limits.h> +#ifndef GL_INTPROPS_H +# define GL_INTPROPS_H + +# include <limits.h> /* The extra casts in the following macros work around compiler bugs, e.g., in Cray C 5.0.3.0. */ /* True if the arithmetic type T is an integer type. bool counts as an integer. */ -#define TYPE_IS_INTEGER(t) ((t) 1.5 == 1) +# 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. */ -#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) +# 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)) +# define TYPE_SIGNED(t) (! ((t) 0 < (t) -1)) /* The maximum and minimum values for the integer type T. These macros have undefined behavior if T is signed and has padding bits. If this is a problem for you, please let us know how to fix it for your host. */ -#define TYPE_MINIMUM(t) \ +# define TYPE_MINIMUM(t) \ ((t) (! TYPE_SIGNED (t) \ - ? (t) 0 \ - : TYPE_SIGNED_MAGNITUDE (t) \ - ? ~ (t) 0 \ - : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))) -#define TYPE_MAXIMUM(t) \ + ? (t) 0 \ + : TYPE_SIGNED_MAGNITUDE (t) \ + ? ~ (t) 0 \ + : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))) +# define TYPE_MAXIMUM(t) \ ((t) (! TYPE_SIGNED (t) \ - ? (t) -1 \ - : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))) + ? (t) -1 \ + : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))) /* Return zero if T can be determined to be an unsigned type. Otherwise, return 1. @@ -58,20 +62,22 @@ tighter bound. Otherwise, it overestimates the true bound by one byte when applied to unsigned types of size 2, 4, 16, ... bytes. The symbol signed_type_or_expr__ is private to this header file. */ -#if __GNUC__ >= 2 -# define signed_type_or_expr__(t) TYPE_SIGNED (__typeof__ (t)) -#else -# define signed_type_or_expr__(t) 1 -#endif +# if __GNUC__ >= 2 +# define signed_type_or_expr__(t) TYPE_SIGNED (__typeof__ (t)) +# else +# define signed_type_or_expr__(t) 1 +# endif /* 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. */ -#define INT_STRLEN_BOUND(t) \ +# define INT_STRLEN_BOUND(t) \ ((sizeof (t) * CHAR_BIT - signed_type_or_expr__ (t)) * 146 / 485 \ + signed_type_or_expr__ (t) + 1) /* Bound on buffer size needed to represent an integer type or expression T, including the terminating null. */ -#define INT_BUFSIZE_BOUND(t) (INT_STRLEN_BOUND (t) + 1) +# define INT_BUFSIZE_BOUND(t) (INT_STRLEN_BOUND (t) + 1) + +#endif /* GL_INTPROPS_H */ |