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/ansi.h

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    1 /*-
    2  * Copyright (c) 1990, 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  * 3. All advertising materials mentioning features or use of this software
   14  *    must display the following acknowledgement:
   15  *      This product includes software developed by the University of
   16  *      California, Berkeley and its contributors.
   17  * 4. Neither the name of the University nor the names of its contributors
   18  *    may be used to endorse or promote products derived from this software
   19  *    without specific prior written permission.
   20  *
   21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   31  * SUCH DAMAGE.
   32  *
   33  *      @(#)ansi.h      8.2 (Berkeley) 1/4/94
   34  * $FreeBSD$
   35  */
   36 
   37 #ifndef _MACHINE_ANSI_H_
   38 #define _MACHINE_ANSI_H_
   39 
   40 /*
   41  * Types which are fundamental to the implementation and must be declared
   42  * in more than one standard header are defined here.  Standard headers
   43  * then use:
   44  *      #ifdef  _BSD_SIZE_T_
   45  *      typedef _BSD_SIZE_T_    size_t;
   46  *      #undef  _BSD_SIZE_T_
   47  *      #endif
   48  */
   49 #define _BSD_CLOCK_T_   unsigned long           /* clock()... */
   50 #define _BSD_CLOCKID_T_ int                     /* clock_gettime()... */
   51 #define _BSD_MBSTATE_T_ __mbstate_t             /* mbstate_t */
   52 #define _BSD_PTRDIFF_T_ int                     /* ptr1 - ptr2 */
   53 #define _BSD_RUNE_T_    _BSD_CT_RUNE_T_         /* rune_t (see below) */
   54 #define _BSD_SIZE_T_    unsigned int            /* sizeof() */
   55 #define _BSD_SOCKLEN_T_ __uint32_t              /* socklen_t (duh) */
   56 #define _BSD_SSIZE_T_   int                     /* byte count or error */
   57 #define _BSD_TIME_T_    long                    /* time()... */
   58 #define _BSD_TIMER_T_   int                     /* timer_gettime()... */
   59 #define _BSD_WCHAR_T_   _BSD_CT_RUNE_T_         /* wchar_t (see below) */
   60 #define _BSD_WINT_T_    _BSD_CT_RUNE_T_         /* wint_t (see below) */
   61 
   62 /*
   63  * Types which are fundamental to the implementation and must be used
   64  * in more than one standard header although they are only declared in
   65  * one (perhaps nonstandard) header are defined here.  Standard headers
   66  * use _BSD_XXX_T_ without undef'ing it.
   67  */
   68 #define _BSD_CT_RUNE_T_ int                     /* arg type for ctype funcs */
   69 #define _BSD_OFF_T_     __int64_t               /* file offset */
   70 #define _BSD_PID_T_     int                     /* process [group] */
   71 #define _BSD_VA_LIST_   char *                  /* va_list */
   72 
   73 /*
   74  * The rune type above is declared to be an ``int'' instead of the more natural
   75  * ``unsigned long'' or ``long''.  Two things are happening here.  It is not
   76  * unsigned so that EOF (-1) can be naturally assigned to it and used.  Also,
   77  * it looks like 10646 will be a 31 bit standard.  This means that if your
   78  * ints cannot hold 32 bits, you will be in trouble.  The reason an int was
   79  * chosen over a long is that the is*() and to*() routines take ints (says
   80  * ANSI C), but they use _BSD_CT_RUNE_T_ instead of int.  By changing it
   81  * here, you lose a bit of ANSI conformance, but your programs will still
   82  * work.
   83  *
   84  * NOTE: rune_t is not covered by ANSI nor other standards, and should not
   85  * be instantiated outside of lib/libc/locale.  Use wchar_t.  wchar_t and
   86  * rune_t must be the same type.  Also wint_t must be no narrower than
   87  * wchar_t, and should also be able to hold all members of the largest
   88  * character set plus one extra value (WEOF). wint_t must be at least 16 bits.
   89  */
   90 
   91 /*
   92  * Frequencies of the clock ticks reported by clock() and times().  They
   93  * are the same as stathz for bogus historical reasons.  They should be
   94  * 1e6 because clock() and times() are implemented using getrusage() and
   95  * there is no good reason why they should be less accurate.  There is
   96  * the bad reason that (broken) programs might not like clock_t or
   97  * CLOCKS_PER_SEC being ``double'' (``unsigned long'' is not large enough
   98  * to hold the required 24 hours worth of ticks if the frequency is
   99  * 1000000ul, and ``unsigned long long'' would be nonstandard).
  100  */
  101 #define _BSD_CLK_TCK_           128
  102 #define _BSD_CLOCKS_PER_SEC_    128
  103 
  104 /*
  105  * We define this here since both <stddef.h> and <sys/types.h> needs it.
  106  */
  107 #define __offsetof(type, field) ((size_t)(&((type *)0)->field))
  108 
  109 /*
  110  * XXX this paragraph is very out of date.
  111  * Typedefs for especially magic types.  #define's wouldn't work in the
  112  * __GNUC__ case, since __attribute__(()) only works in certain contexts.
  113  * This is not in <machine/types.h>, since that has too much namespace
  114  * pollution for inclusion in ANSI headers, yet we need __int64_t in at
  115  * least <stdio.h>.
  116  */
  117 #ifdef __GNUC__
  118 typedef int __attribute__((__mode__(__DI__)))            __int64_t;
  119 typedef unsigned int __attribute__((__mode__(__DI__)))  __uint64_t;
  120 #else
  121 /* LONGLONG */
  122 typedef long long                                        __int64_t;
  123 /* LONGLONG */
  124 typedef unsigned long long                              __uint64_t;
  125 #endif
  126 /*
  127  * Internal names for basic integral types.  Omit the typedef if
  128  * not possible for a machine/compiler combination.
  129  */
  130 typedef __signed char              __int8_t;
  131 typedef unsigned char             __uint8_t;
  132 typedef short                     __int16_t;
  133 typedef unsigned short           __uint16_t;
  134 typedef int                       __int32_t;
  135 typedef unsigned int             __uint32_t;
  136 
  137 typedef int                      __intptr_t;
  138 typedef unsigned int            __uintptr_t;
  139 
  140 /*
  141  * mbstate_t is an opaque object to keep conversion state, during multibyte
  142  * stream conversions.  The content must not be referenced by user programs.
  143  */
  144 typedef union {
  145         char            __mbstate8[128];
  146         __int64_t       _mbstateL;              /* for alignment */
  147 } __mbstate_t;
  148 
  149 #endif /* !_MACHINE_ANSI_H_ */

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