Home | History | Annotate | Line # | Download | only in sys 
      1 /*	$NetBSD: common_limits.h,v 1.4 2024/10/30 15:56:12 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2014 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Matt Thomas of 3am Software Foundry.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _SYS_COMMON_LIMITS_H_
     33 #define _SYS_COMMON_LIMITS_H_
     34 
     35 #include <sys/featuretest.h>
     36 
     37 #define	CHAR_BIT	__CHAR_BIT__	/* number of bits in a char */
     38 
     39 #define SCHAR_MIN	(-__SCHAR_MAX__-1) /* min value for a signed char */
     40 #define	SCHAR_MAX	__SCHAR_MAX__	/* max value for a signed char */
     41 #define	UCHAR_MAX	(2*SCHAR_MAX+1)	/* max value for an unsigned char */
     42 
     43 #define	SHRT_MIN	(-__SHRT_MAX__-1) /* min value for a short */
     44 #define	SHRT_MAX	__SHRT_MAX__	/* max value for a short */
     45 #define	USHRT_MAX	(2*SHRT_MAX+1)	/* max value for an unsigned short */
     46 
     47 #define	INT_MIN		(-__INT_MAX__-1) /* min value for an int */
     48 #define	INT_MAX		__INT_MAX__	/* max value for an int */
     49 #define	UINT_MAX	(2U*INT_MAX+1U)	/* max value for an unsigned int */
     50 
     51 #define	LONG_MIN	(-__LONG_MAX__-1L)	/* min value for a long */
     52 #define	LONG_MAX	__LONG_MAX__		/* max value for a long */
     53 #define	ULONG_MAX	(2UL*LONG_MAX+1UL)	/* max unsigned long */
     54 
     55 #if defined(_ISOC99_SOURCE) || (__STDC_VERSION__ - 0) >= 199901L || \
     56     defined(_NETBSD_SOURCE)
     57 #define	LLONG_MIN	(-__LONG_LONG_MAX__-1LL) /* min signed long long */
     58 #define	LLONG_MAX	__LONG_LONG_MAX__	/* max signed long long */
     59 #define	ULLONG_MAX	(2ULL*LLONG_MAX+1ULL)	/* max unsigned long long */
     60 #endif
     61 
     62 #if defined(_POSIX_C_SOURCE) || defined(_XOPEN_SOURCE) || \
     63     defined(_NETBSD_SOURCE)
     64 #define	SSIZE_MAX	LONG_MAX	/* max value for a ssize_t */
     65 
     66 #if defined(_NETBSD_SOURCE)
     67 #define	SSIZE_MIN	LONG_MIN	/* min value for a ssize_t */
     68 #define	SIZE_T_MAX	ULONG_MAX	/* max value for a size_t */
     69 
     70 #define	UQUAD_MAX	ULLONG_MAX	/* max unsigned quad */
     71 #define	QUAD_MAX	LLONG_MAX	/* max signed quad */
     72 #define	QUAD_MIN	LLONG_MIN	/* min signed quad */
     73 
     74 #endif /* _NETBSD_SOURCE */
     75 #endif /* _POSIX_C_SOURCE || _XOPEN_SOURCE || _NETBSD_SOURCE */
     76 
     77 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
     78 #define LONG_BIT	(__SIZEOF_LONG__ * 8)
     79 #define WORD_BIT	(__SIZEOF_INT__ * 8)
     80 
     81 #define DBL_DIG		__DBL_DIG__
     82 #define DBL_MAX		__DBL_MAX__
     83 #define DBL_MIN		__DBL_MIN__
     84 
     85 #define FLT_DIG		__FLT_DIG__
     86 #define FLT_MAX		__FLT_MAX__
     87 #define FLT_MIN		__FLT_MIN__
     88 
     89 #ifdef __LDBL_DIG__
     90 #define LDBL_DIG	__LDBL_DIG__
     91 #define LDBL_MAX	__LDBL_MAX__
     92 #define LDBL_MIN	__LDBL_MIN__
     93 #endif
     94 
     95 #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
     96 
     97 #endif /* _SYS_COMMON_LIMITS_H_ */
     98