FreeBSD/Linux Kernel Cross Reference
sys/sys/limits.h

     /* $OpenBSD: limits.h,v 1.10 2012/06/30 20:21:10 guenther Exp $ */
     /*
      * Copyright (c) 2002 Marc Espie.
      *
      * 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.
     *
     * THIS SOFTWARE IS PROVIDED BY THE OPENBSD PROJECT 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 OPENBSD
     * PROJECT 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.
     */
    #ifndef _SYS_LIMITS_H_
    #define _SYS_LIMITS_H_
    
    #include <sys/cdefs.h>
    
    /* Common definitions for limits.h. */
    
    /* Legacy */
    #include <machine/limits.h>
    
    #define CHAR_BIT        8               /* number of bits in a char */
    
    #define SCHAR_MAX       0x7f            /* max value for a signed char */
    #define SCHAR_MIN       (-0x7f-1)       /* min value for a signed char */
    
    #define UCHAR_MAX       0xff            /* max value for an unsigned char */
    #ifdef __CHAR_UNSIGNED__
    # define CHAR_MIN       0               /* min value for a char */
    # define CHAR_MAX       0xff            /* max value for a char */
    #else
    # define CHAR_MAX       0x7f
    # define CHAR_MIN       (-0x7f-1)
    #endif
    
    #define MB_LEN_MAX      4               /* Allow UTF-8 (RFC 3629) */
    
    #define USHRT_MAX       0xffff          /* 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 value for unsigned long */
    # define LONG_MAX       0x7fffffffffffffffL     
                                            /* max value for a signed long */
    # define LONG_MIN       (-0x7fffffffffffffffL-1)        
                                            /* min value for a signed long */
    #else
    # define ULONG_MAX      0xffffffffUL    /* max value for an unsigned long */
    # define LONG_MAX       0x7fffffffL     /* max value for a long */
    # define LONG_MIN       (-0x7fffffffL-1)/* min value for a long */
    #endif
    
    #if __BSD_VISIBLE || __ISO_C_VISIBLE >= 1999
    # define ULLONG_MAX     0xffffffffffffffffULL   
                                            /* max value for unsigned long long */
    # define LLONG_MAX      0x7fffffffffffffffLL    
                                            /* max value for a signed long long */
    # define LLONG_MIN      (-0x7fffffffffffffffLL-1)       
                                            /* min value for a signed long long */
    #endif
    
    #if __BSD_VISIBLE
    # define UID_MAX        UINT_MAX        /* max value for a uid_t */
    # define GID_MAX        UINT_MAX        /* max value for a gid_t */
    #endif
    
    #if __XPG_VISIBLE || __POSIX_VISIBLE >= 200809
    # ifdef __LP64__
    #  define LONG_BIT      64
    # else
    #  define LONG_BIT      32
    # endif
    # define WORD_BIT       32
    #endif
    
    #if __XPG_VISIBLE < 600
    # include <machine/_float.h>
    
    /* XSI defines marked LEGACY in XPG5 and removed in IEEE Std 1003.1-2001 */
   # ifndef FLT_DIG
   #   define FLT_DIG      __FLT_DIG
   # endif
   # ifndef FLT_MAX
   #   define FLT_MAX      __FLT_MAX
   # endif
   # ifndef DBL_DIG
   #   define DBL_DIG      __DBL_DIG
   # endif
   # ifndef DBL_MAX
   #   define DBL_MAX      __DBL_MAX
   # endif
   
   /* XSI defines marked LEGACY in XPG4v2 and removed in XPG5 */
   # if __XPG_VISIBLE < 500
   #  ifndef FLT_MIN
   #    define FLT_MIN     __FLT_MIN
   #  endif
   #  ifndef DBL_MIN
   #    define DBL_MIN     __DBL_MIN
   #  endif
   # endif
   
   #endif /* __XPG_VISIBLE < 600 */
   
   #endif

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