15c6926126
* Add gnulib files generated by gnulib-tool in build-aux, m4 and
grub-core/gnulib directories
* .bzignore: Add **/.deps and autogenerated gnulib files
* configure.ac: Assign auxiliary directory to build-aux, add invocation
of gnulib macros, add grub-core/gnulib/Makefile
* Makefile.am: Add gnulib directory in SUBDIRS (removing unnecessary .),
include m4 directory to aclocal.
* Makefile.util.def: Remove direct compilation of gnulib source files
and use the new grub-core/gnulib/libgnu.a.
* build-aux/config.rpath: move config.rpath from top directory to
build-aux
* conf/Makefile.common: Remove the macro _GL_UNUSED already defined
in gnulib headers
* conf/Makefile.extra-dist: Add m4/gnulib-cache.m4
* grub-core/Makefile.core.def: Remove unnecessary extra_dist
* grub-core/lib/posix_wrap/localcharset.h (locale_charset): Update
header.
* grub-core/lib/posix_wrap/langinfo.h (nl_langinfo): Return static
string.
83 lines
3.2 KiB
C
83 lines
3.2 KiB
C
/* intprops.h -- properties of integer types
|
|
|
|
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
|
|
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. */
|
|
|
|
#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)
|
|
|
|
/* 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)
|
|
|
|
#endif /* GL_INTPROPS_H */
|