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/i386/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: src/sys/i386/include/_limits.h,v 1.26.2.1 2005/01/31 23:26:04 imp Exp $
   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  * These numbers are for the default configuration of gcc.  They work for
   44  * some other compilers as well, but this should not be depended on.
   45  */
   46 
   47 #define __CHAR_BIT      8               /* number of bits in a char */
   48 
   49 #define __SCHAR_MAX     0x7f            /* max value for a signed char */
   50 #define __SCHAR_MIN     (-0x7f - 1)     /* min value for a signed char */
   51 
   52 #define __UCHAR_MAX     0xff            /* max value for an unsigned char */
   53 
   54 #define __USHRT_MAX     0xffff          /* max value for an unsigned short */
   55 #define __SHRT_MAX      0x7fff          /* max value for a short */
   56 #define __SHRT_MIN      (-0x7fff - 1)   /* min value for a short */
   57 
   58 #define __UINT_MAX      0xffffffffU     /* max value for an unsigned int */
   59 #define __INT_MAX       0x7fffffff      /* max value for an int */
   60 #define __INT_MIN       (-0x7fffffff - 1)       /* min value for an int */
   61 
   62 /* Bad hack for gcc configured to give 64-bit longs. */
   63 #ifdef _LARGE_LONG
   64 #define __ULONG_MAX     0xffffffffffffffffUL
   65 #define __LONG_MAX      0x7fffffffffffffffL
   66 #define __LONG_MIN      (-0x7fffffffffffffffL - 1)
   67 #else
   68 #define __ULONG_MAX     0xffffffffUL    /* max value for an unsigned long */
   69 #define __LONG_MAX      0x7fffffffL     /* max value for a long */
   70 #define __LONG_MIN      (-0x7fffffffL - 1)      /* min value for a long */
   71 #endif
   72 
   73                         /* max value for an unsigned long long */
   74 #define __ULLONG_MAX    0xffffffffffffffffULL
   75 #define __LLONG_MAX     0x7fffffffffffffffLL    /* max value for a long long */
   76 #define __LLONG_MIN     (-0x7fffffffffffffffLL - 1)  /* min for a long long */
   77 
   78 #define __SSIZE_MAX     __INT_MAX       /* max value for a ssize_t */
   79 
   80 #define __SIZE_T_MAX    __UINT_MAX      /* max value for a size_t */
   81 
   82 #define __OFF_MAX       __LLONG_MAX     /* max value for an off_t */
   83 #define __OFF_MIN       __LLONG_MIN     /* min value for an off_t */
   84 
   85 /* Quads and long longs are the same size.  Ensure they stay in sync. */
   86 #define __UQUAD_MAX     __ULLONG_MAX    /* max value for a uquad_t */
   87 #define __QUAD_MAX      __LLONG_MAX     /* max value for a quad_t */
   88 #define __QUAD_MIN      __LLONG_MIN     /* min value for a quad_t */
   89 
   90 #ifdef _LARGE_LONG
   91 #define __LONG_BIT      64
   92 #else
   93 #define __LONG_BIT      32
   94 #endif
   95 #define __WORD_BIT      32
   96 
   97 #endif /* !_MACHINE__LIMITS_H_ */

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