## root/libdb/compat.h

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## INCLUDED FROM

    /*-
     * Copyright (c) 1991, 1993
     *      The Regents of the University of California.  All rights reserved.
     *
     * 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.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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 _COMPAT_H_
    #define _COMPAT_H_

    #include <sys/types.h>

    #if (defined(_WIN32) && !defined(__CYGWIN__)) || defined(__DJGPP__)
    typedef unsigned char   u_char;
    typedef unsigned int    u_int;
    typedef unsigned long   u_long;
    typedef unsigned short  u_short;
    #endif /* _WIN32 || __DJGPP__ */

    #ifdef  NO_POSIX_SIGNALS
    #define sigemptyset(set)        (*(set) = 0)
    #define sigfillset(set)         (*(set) = ~(sigset_t)0, 0)
    #define sigaddset(set,signo)    (*(set) |= sigmask(signo), 0)
    #define sigdelset(set,signo)    (*(set) &= ~sigmask(signo), 0)
    #define sigismember(set,signo)  ((*(set) & sigmask(signo)) != 0)

    #define SIG_BLOCK       1
    #define SIG_UNBLOCK     2
    #define SIG_SETMASK     3

    static int __sigtemp;           /* For the use of sigprocmask */

    /* Repeated test of oset != NULL is to avoid "*0". */
    #define sigprocmask(how, set, oset)                                     \
            ((__sigtemp =                                                   \
            (((how) == SIG_BLOCK) ?                                         \
                    sigblock(0) | *(set) :                                  \
            (((how) == SIG_UNBLOCK) ?                                       \
                    sigblock(0) & ~(*(set)) :                               \
            ((how) == SIG_SETMASK ?                                         \
                    *(set) : sigblock(0))))),                               \
            ((oset) ? (*(oset ? oset : set) = sigsetmask(__sigtemp)) :      \
                    sigsetmask(__sigtemp)), 0)
    #endif

    /*
     * If your system doesn't have an include file with the appropriate
     * byte order set, make sure you specify the correct one.
     */
    #ifndef BYTE_ORDER
    #define LITTLE_ENDIAN   1234
    #define BIG_ENDIAN      4321
    #ifdef WORDS_BIGENDIAN
    #define BYTE_ORDER BIG_ENDIAN
    #else
    #define BYTE_ORDER LITTLE_ENDIAN
    #endif
    #endif

    /*
     * Old definitions were rewritten using 'HAVE_XXX' macros.
     *
     * #if defined(SYSV) || defined(SYSTEM5)
     * #define      index(a, b)             strchr(a, b)
     * #define      rindex(a, b)            strrchr(a, b)
     * #define      bzero(a, b)             memset(a, 0, b)
     * #define      bcmp(a, b, n)           memcmp(a, b, n)
     * #define      bcopy(a, b, n)          memmove(b, a, n)
     * #endif
     *
     * #if defined(BSD) || defined(BSD4_3)
     * #define      strchr(a, b)            index(a, b)
     * #define      strrchr(a, b)           rindex(a, b)
     * #define      memcmp(a, b, n)         bcmp(a, b, n)
     * #define      memmove(a, b, n)        bcopy(b, a, n)
     * #endif
    */
    #if !defined (HAVE_INDEX) && defined (HAVE_STRCHR)
    #define index(a, b)             strchr(a, b)
    #endif
    #if !defined (HAVE_RINDEX) && defined (HAVE_STRRCHR)
    #define rindex(a, b)            strrchr(a, b)
    #endif
    #if !defined (HAVE_BZERO) && defined (HAVE_MEMSET)
    #define bzero(a, b)             memset(a, 0, b)
    #endif
    #if !defined (HAVE_BCMP) && defined (HAVE_MEMCMP)
    #define bcmp(a, b, n)           memcmp(a, b, n)
    #endif
    #if !defined (HAVE_BCOPY) && defined (HAVE_MEMMOVE)
    #define bcopy(a, b, n)          memmove(b, a, n)
    #endif

    #if !defined (HAVE_STRCHR) && defined (HAVE_INDEX)
    #define strchr(a, b)            index(a, b)
    #endif
    #if !defined (HAVE_STRRCHR) && defined (HAVE_RINDEX)
    #define strrchr(a, b)           rindex(a, b)
    #endif
    #if !defined (HAVE_MEMCMP) && defined (HAVE_BCMP)
    #define memcmp(a, b, n)         bcmp(a, b, n)
    #endif
    #if !defined (HAVE_MEMMOVE) && defined (HAVE_BCOPY)
    #define memmove(a, b, n)        bcopy(b, a, n)
    #endif

    /*
     * 32-bit machine.  The db routines are theoretically independent of
     * the size of u_shorts and u_longs, but I don't know that anyone has
     * ever actually tried it.  At a minimum, change the following #define's
     * if you are trying to compile on a different type of system.
     */
    #ifndef O_ACCMODE                       /* POSIX 1003.1 access mode mask. */
    #define O_ACCMODE       (O_RDONLY|O_WRONLY|O_RDWR)
    #endif

    #ifndef _POSIX2_RE_DUP_MAX              /* POSIX 1003.2 RE limit. */
    #define _POSIX2_RE_DUP_MAX      255
    #endif

    /*
     * If you can't provide lock values in the open(2) call.  Note, this
     * allows races to happen.
     */
    #ifndef O_EXLOCK                        /* 4.4BSD extension. */
    #define O_EXLOCK        0
    #endif

    #ifndef O_SHLOCK                        /* 4.4BSD extension. */
    #define O_SHLOCK        0
    #endif

    #ifndef O_BINARY        /* UNIX systems don't often have or need this */
    #define O_BINARY 0
    #endif

    #ifndef O_NONBLOCK      /* Win32 systems doesn't have or need this */
    #define O_NONBLOCK      0
    #endif

    #ifndef EFTYPE
    #define EFTYPE          EINVAL          /* POSIX 1003.1 format errno. */
    #endif

    #ifndef SEEK_END
    #define SEEK_SET        0               /* POSIX 1003.1 seek values */
    #define SEEK_CUR        1
    #define SEEK_END        2
    #endif

    #ifndef _POSIX2_RE_DUP_MAX              /* POSIX 1003.2 values. */
    #define _POSIX2_RE_DUP_MAX      255
    #endif

    #ifndef NULL                            /* ANSI C #defines NULL everywhere. */
    #define NULL            0
    #endif

    #ifndef MAX                             /* Usually found in <sys/param.h>. */
    #define MAX(_a,_b)      ((_a)<(_b)?(_b):(_a))
    #endif
    #ifndef MIN                             /* Usually found in <sys/param.h>. */
    #define MIN(_a,_b)      ((_a)<(_b)?(_a):(_b))
    #endif

    #ifndef S_ISDIR                         /* POSIX 1003.1 file type tests. */
    #define S_ISDIR(m)      ((m & 0170000) == 0040000)      /* directory */
    #define S_ISCHR(m)      ((m & 0170000) == 0020000)      /* char special */
    #define S_ISBLK(m)      ((m & 0170000) == 0060000)      /* block special */
    #define S_ISREG(m)      ((m & 0170000) == 0100000)      /* regular file */
    #define S_ISFIFO(m)     ((m & 0170000) == 0010000)      /* fifo */
    #endif

    #ifndef HAVE_LSTAT
    #define lstat   stat
    #endif
    #ifndef HAVE_GETCWD
    #define getcwd(buf, max) getwd (buf)
    #endif

    #endif /* !_COMPAT_H_ */

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