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/* typemax.h -- encapsulate max values for long, long long, etc. */
/* Copyright (C) 2001 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash 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.
Bash 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 Bash. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* NOTE: This should be included after config.h, limits.h, stdint.h, and
* inttypes.h
*/
#ifndef _SH_TYPEMAX_H
#define _SH_TYPEMAX_H
#ifndef CHAR_BIT
# define CHAR_BIT 8
#endif
/* Nonzero if the integer type T is signed. */
#ifndef TYPE_SIGNED
# define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
#endif
#ifndef TYPE_MINIMUM
# define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) \
: (t) 0))
#endif
#ifndef TYPE_MAXIMUM
# define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t)))
#endif
#ifdef HAVE_LONG_LONG
# ifndef LLONG_MAX
# define LLONG_MAX TYPE_MAXIMUM(long long int)
# define LLONG_MIN TYPE_MINIMUM(long long int)
# endif
# ifndef ULLONG_MAX
# define ULLONG_MAX TYPE_MAXIMUM(unsigned long long int)
# endif
#endif
#ifndef ULONG_MAX
# define ULONG_MAX ((unsigned long) ~(unsigned long) 0)
#endif
#ifndef LONG_MAX
# define LONG_MAX ((long int) (ULONG_MAX >> 1))
# define LONG_MIN ((long int) (-LONG_MAX - 1L))
#endif
#ifndef INT_MAX /* ouch */
# define INT_MAX TYPE_MAXIMUM(int)
# define INT_MIN TYPE_MINIMUM(int)
# define UINT_MAX ((unsigned int) ~(unsigned int)0)
#endif
/* workaround for gcc bug in versions < 2.7 */
#if defined (HAVE_LONG_LONG) && __GNUC__ == 2 && __GNUC_MINOR__ < 7
static const unsigned long long int maxquad = ULLONG_MAX;
# undef ULLONG_MAX
# define ULLONG_MAX maxquad
#endif
#if !defined (INTMAX_MAX) || !defined (INTMAX_MIN)
#if SIZEOF_INTMAX_T == SIZEOF_LONG_LONG
# define INTMAX_MAX LLONG_MAX
# define INTMAX_MIN LLONG_MIN
#elif SIZEOF_INTMAX_T == SIZEOF_LONG
# define INTMAX_MAX LONG_MAX
# define INTMAX_MIN LONG_MIN
#else
# define INTMAX_MAX INT_MAX
# define INTMAX_MIN INT_MIN
#endif
#endif
#ifndef SSIZE_MAX
# define SSIZE_MAX 32767 /* POSIX minimum max */
#endif
#endif /* _SH_TYPEMAX_H */
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