root/libdb/compat.h

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/*-
 * 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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