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NetBSD/sys/arch/powerpc/include/limits.h
bjh21 4be7a2dcf3 Add a new feature-test macro, _NETBSD_SOURCE. If this is defined 
by the application, all NetBSD interfaces are made visible, even
if some other feature-test macro (like _POSIX_C_SOURCE) is defined.
<sys/featuretest.h> defined _NETBSD_SOURCE if none of _ANSI_SOURCE,
_POSIX_C_SOURCE and _XOPEN_SOURCE is defined, so as to preserve
existing behaviour.

This has two major advantages:
+ Programs that require non-POSIX facilities but define _POSIX_C_SOURCE
  can trivially be overruled by putting -D_NETBSD_SOURCE in their CFLAGS.
+ It makes most of the #ifs simpler, in that they're all now ORs of the
  various macros, rather than having checks for (!defined(_ANSI_SOURCE) ||
  !defined(_POSIX_C_SOURCE) || !defined(_XOPEN_SOURCE)) all over the place.

I've tried not to change the semantics of the headers in any case where
_NETBSD_SOURCE wasn't defined, but there were some places where the
current semantics were clearly mad, and retaining them was harder than
correcting them.  In particular, I've mostly normalised things so that
_ANSI_SOURCE gets you the smallest set of stuff, then _POSIX_C_SOURCE,
_XOPEN_SOURCE and _NETBSD_SOURCE in that order.

Tested by building for vax, encouraged by thorpej, and uncontested in
tech-userlevel for a week.
2003-04-28 23:16:11 +00:00

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/* $NetBSD: limits.h,v 1.11 2003/04/28 23:16:22 bjh21 Exp $ */
/*
* Copyright (c) 1988, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)limits.h 8.3 (Berkeley) 1/4/94
*/
#ifndef _POWERPC_LIMITS_H_
#define _POWERPC_LIMITS_H_
#include <sys/featuretest.h>
#define CHAR_BIT 8 /* number of bits in a char */
#define MB_LEN_MAX 32 /* Allow 31 bit UTF2 */
/*
* According to ANSI (section 2.2.4.2), the values below must be usable by
* #if preprocessing directives. Additionally, the expression must have the
* same type as would an expression that is an object of the corresponding
* type converted according to the integral promotions. The subtraction for
* INT_MIN and LONG_MIN is so the value is not unsigned; 2147483648 is an
* unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
* These numbers work for pcc as well. The UINT_MAX and ULONG_MAX values
* are written as hex so that GCC will be quiet about large integer constants.
*/
#define SCHAR_MAX 0x7f /* min value for a signed char */
#define SCHAR_MIN (-0x7f-1) /* max value for a signed char */
#define UCHAR_MAX 0xffU /* max value for an unsigned char */
#define CHAR_MAX 0xffU /* max value for a char */
#define CHAR_MIN 0 /* min value for a char */
#define USHRT_MAX 0xffffU /* max value for an unsigned short */
#define SHRT_MAX 0x7fff /* max value for a short */
#define SHRT_MIN (-0x7fff-1) /* min value for a short */
#define UINT_MAX 0xffffffffU /* max value for an unsigned int */
#define INT_MAX 0x7fffffff /* max value for an int */
#define INT_MIN (-0x7fffffff-1) /* min value for an int */
#ifdef _LP64
#define ULONG_MAX 0xffffffffffffffffUL /* max for an unsigned long */
#define LONG_MAX 0x7fffffffffffffffL /* max for a long */
#define LONG_MIN (-0x7fffffffffffffffL-1) /* min for a long */
#else
#define ULONG_MAX 0xffffffffUL /* max value for an unsigned long */
#define LONG_MAX 0x7fffffffL /* max value for a long */
#define LONG_MIN (-0x7fffffff-1) /* min value for a long */
#endif
#if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
defined(_NETBSD_SOURCE)
#ifdef _LP64
#define SSIZE_MAX LONG_MAX /* max value for a ssize_t */
#else
#define SSIZE_MAX INT_MAX /* max value for a ssize_t */
#endif
#if defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
defined(_NETBSD_SOURCE)
#define ULLONG_MAX 0xffffffffffffffffULL /* max unsigned long long */
#define LLONG_MAX 0x7fffffffffffffffLL /* max signed long long */
#define LLONG_MIN (-0x7fffffffffffffffLL-1) /* min signed long long */
#endif
#if defined(_NETBSD_SOURCE)
#ifdef _LP64
#define SIZE_T_MAX ULONG_MAX /* max value for a size_t */
#else
#define SIZE_T_MAX UINT_MAX /* max value for a size_t */
#endif
#ifdef _LP64
/* Quads and longs are the same on LP64. */
#define UQUAD_MAX (ULONG_MAX)
#define QUAD_MAX (LONG_MAX)
#define QUAD_MIN (LONG_MIN)
#else
/* GCC requires that quad constants be written as expressions. */
#define UQUAD_MAX ((u_quad_t)0-1) /* max value for a uquad_t */
/* max value for a quad_t */
#define QUAD_MAX ((quad_t)(UQUAD_MAX >> 1))
#define QUAD_MIN (-QUAD_MAX-1) /* min value for a quad_t */
#endif
#endif /* _NETBSD_SOURCE */
#endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */
#if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
#ifdef _LP64
#define LONG_BIT 64
#else
#define LONG_BIT 32
#endif
#define WORD_BIT 32
#define DBL_DIG 15
#define DBL_MAX 1.7976931348623157E+308
#define DBL_MIN 2.2250738585072014E-308
#define FLT_DIG 6
#define FLT_MAX 3.40282347E+38F
#define FLT_MIN 1.17549435E-38F
#endif
#endif /* _POWERPC_LIMITS_H_ */
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