| Index: bison/src/bison/2.4.1/bison-2.4.1-src/lib/intprops.h
|
| ===================================================================
|
| --- bison/src/bison/2.4.1/bison-2.4.1-src/lib/intprops.h (revision 0)
|
| +++ bison/src/bison/2.4.1/bison-2.4.1-src/lib/intprops.h (revision 0)
|
| @@ -0,0 +1,77 @@
|
| +/* intprops.h -- properties of integer types
|
| +
|
| + Copyright (C) 2001, 2002, 2003, 2004, 2005 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
|
| + the Free Software Foundation; either version 3 of the License, or
|
| + (at your option) any later version.
|
| +
|
| + This program is distributed in the hope that it will be useful,
|
| + but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| + GNU General Public License for more details.
|
| +
|
| + You should have received a copy of the GNU General Public License
|
| + along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
| +
|
| +/* Written by Paul Eggert. */
|
| +
|
| +#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)
|
| +
|
| +/* 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)
|
| +
|
| +/* True if the arithmetic type T is signed. */
|
| +#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) \
|
| + ((t) (! TYPE_SIGNED (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))))
|
| +
|
| +/* Return zero if T can be determined to be an unsigned type.
|
| + Otherwise, return 1.
|
| + When compiling with GCC, INT_STRLEN_BOUND uses this macro to obtain a
|
| + 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
|
| +
|
| +/* 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) \
|
| + ((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)
|
|
|
| Property changes on: bison\src\bison\2.4.1\bison-2.4.1-src\lib\intprops.h
|
| ___________________________________________________________________
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| Added: svn:eol-style
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