The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/x86/include/_limits.h

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    1 /*-
    2  * Copyright (c) 1988, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)limits.h    8.3 (Berkeley) 1/4/94
   30  * $FreeBSD: releng/10.4/sys/x86/include/_limits.h 235939 2012-05-24 21:44:46Z obrien $
   31  */
   32 
   33 #ifndef _MACHINE__LIMITS_H_
   34 #define _MACHINE__LIMITS_H_
   35 
   36 /*
   37  * According to ANSI (section 2.2.4.2), the values below must be usable by
   38  * #if preprocessing directives.  Additionally, the expression must have the
   39  * same type as would an expression that is an object of the corresponding
   40  * type converted according to the integral promotions.  The subtraction for
   41  * INT_MIN, etc., is so the value is not unsigned; e.g., 0x80000000 is an
   42  * unsigned int for 32-bit two's complement ANSI compilers (section 3.1.3.2).
   43  */
   44 
   45 #define __CHAR_BIT      8               /* number of bits in a char */
   46 
   47 #define __SCHAR_MAX     0x7f            /* max value for a signed char */
   48 #define __SCHAR_MIN     (-0x7f - 1)     /* min value for a signed char */
   49 
   50 #define __UCHAR_MAX     0xff            /* max value for an unsigned char */
   51 
   52 #define __USHRT_MAX     0xffff          /* max value for an unsigned short */
   53 #define __SHRT_MAX      0x7fff          /* max value for a short */
   54 #define __SHRT_MIN      (-0x7fff - 1)   /* min value for a short */
   55 
   56 #define __UINT_MAX      0xffffffff      /* max value for an unsigned int */
   57 #define __INT_MAX       0x7fffffff      /* max value for an int */
   58 #define __INT_MIN       (-0x7fffffff - 1)       /* min value for an int */
   59 
   60 #ifdef  __LP64__
   61 #define __ULONG_MAX     0xffffffffffffffff      /* max for an unsigned long */
   62 #define __LONG_MAX      0x7fffffffffffffff      /* max for a long */
   63 #define __LONG_MIN      (-0x7fffffffffffffff - 1) /* min for a long */
   64 #else
   65 #define __ULONG_MAX     0xffffffffUL
   66 #define __LONG_MAX      0x7fffffffL
   67 #define __LONG_MIN      (-0x7fffffffL - 1)
   68 #endif
   69 
   70                         /* max value for an unsigned long long */
   71 #define __ULLONG_MAX    0xffffffffffffffffULL
   72 #define __LLONG_MAX     0x7fffffffffffffffLL    /* max value for a long long */
   73 #define __LLONG_MIN     (-0x7fffffffffffffffLL - 1)  /* min for a long long */
   74 
   75 #ifdef  __LP64__
   76 #define __SSIZE_MAX     __LONG_MAX      /* max value for a ssize_t */
   77 #define __SIZE_T_MAX    __ULONG_MAX     /* max value for a size_t */
   78 #define __OFF_MAX       __LONG_MAX      /* max value for an off_t */
   79 #define __OFF_MIN       __LONG_MIN      /* min value for an off_t */
   80 /* Quads and longs are the same on the amd64.  Ensure they stay in sync. */
   81 #define __UQUAD_MAX     __ULONG_MAX     /* max value for a uquad_t */
   82 #define __QUAD_MAX      __LONG_MAX      /* max value for a quad_t */
   83 #define __QUAD_MIN      __LONG_MIN      /* min value for a quad_t */
   84 #define __LONG_BIT      64
   85 #else
   86 #define __SSIZE_MAX     __INT_MAX
   87 #define __SIZE_T_MAX    __UINT_MAX
   88 #define __OFF_MAX       __LLONG_MAX
   89 #define __OFF_MIN       __LLONG_MIN
   90 #define __UQUAD_MAX     __ULLONG_MAX
   91 #define __QUAD_MAX      __LLONG_MAX
   92 #define __QUAD_MIN      __LLONG_MIN
   93 #define __LONG_BIT      32
   94 #endif
   95 
   96 #define __WORD_BIT      32
   97 
   98 /* Minimum signal stack size. */
   99 #define __MINSIGSTKSZ   (512 * 4)
  100 
  101 #endif /* !_MACHINE__LIMITS_H_ */

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