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+/* $Header: /usr/people/sam/tiff/libtiff/RCS/tiffcomp.h,v 1.44 1995/06/06 17:00:43 sam Exp $ */
+
+/*
+ * Copyright (c) 1990-1995 Sam Leffler
+ * Copyright (c) 1991-1995 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the names of
+ * Sam Leffler and Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Sam Leffler and Silicon Graphics.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#ifndef _COMPAT_
+#define _COMPAT_
+/*
+ * This file contains a hodgepodge of definitions and
+ * declarations that are needed to provide compatibility
+ * between the native system and the base implementation
+ * that the library assumes.
+ *
+ * NB: This file is a mess.
+ */
+
+/*
+ * Setup basic type definitions and function declaratations.
+ */
+#if defined(__MWERKS__) || defined(THINK_C)
+#include <unix.h>
+#include <math.h>
+#endif
+#include <stdio.h>
+#ifdef applec
+#include <types.h>
+#else
+#if !defined(__MWERKS__) && !defined(THINK_C)
+#include <sys/types.h>
+#endif
+#endif
+#ifdef VMS
+#include <file.h>
+#include <unixio.h>
+#else
+#include <fcntl.h>
+#endif
+#if defined(__MWERKS__) || defined(THINK_C) || defined(applec)
+#include <stdlib.h>
+#define BSDTYPES
+#endif
+#if defined(_WINDOWS) || defined(__WIN32__) || defined(_Windows)
+#define BSDTYPES
+#endif
+#if defined(OS2_16) || defined(OS2_32)
+#define BSDTYPES
+#endif
+
+/*
+ * The library uses the ANSI C/POSIX SEEK_*
+ * definitions that should be defined in unistd.h
+ * (except on VMS or the Mac, where they are in stdio.h and
+ * there is no unistd.h).
+ */
+#ifndef SEEK_SET
+#if !defined(VMS) && !defined (applec) && !defined(THINK_C) && !defined(__MWERKS__)
+#include <unistd.h>
+#endif
+#endif
+
+/*
+ * The library uses memset, memcpy, and memcmp.
+ * ANSI C and System V define these in string.h.
+ */
+#include <string.h>
+
+/*
+ * The BSD typedefs are used throughout the library.
+ * If your system doesn't have them in <sys/types.h>,
+ * then define BSDTYPES in your Makefile.
+ */
+#ifdef BSDTYPES
+typedef unsigned char u_char;
+typedef unsigned short u_short;
+typedef unsigned int u_int;
+typedef unsigned long u_long;
+#endif
+
+/*
+ * dblparam_t is the type that a double precision
+ * floating point value will have on the parameter
+ * stack (when coerced by the compiler).
+ */
+#ifdef applec
+typedef extended dblparam_t;
+#else
+typedef double dblparam_t;
+#endif
+
+/*
+ * If your compiler supports inline functions, then
+ * set INLINE appropriately to get the known hotspots
+ * in the library expanded inline.
+ */
+#ifdef __GNUC__
+#ifdef __STRICT_ANSI__
+#define INLINE __inline__
+#else
+#define INLINE inline
+#endif
+#else /* !__GNUC__ */
+#define INLINE
+#endif
+
+/*
+ * GLOBALDATA is a macro that is used to define global variables
+ * private to the library. We use this indirection to hide
+ * brain-damage in VAXC (and GCC) under VAX/VMS. In these
+ * environments the macro places the variable in a non-shareable
+ * program section, which ought to be done by default (sigh!)
+ *
+ * Apparently DEC are aware of the problem as this behaviour is the
+ * default under VMS on AXP.
+ *
+ * The GNU C variant is untested.
+ */
+#if defined(VAX) && defined(VMS)
+#ifdef VAXC
+#define GLOBALDATA(TYPE,NAME) extern noshare TYPE NAME
+#endif
+#ifdef __GNUC__
+#define GLOBALDATA(TYPE,NAME) extern TYPE NAME \
+ asm("_$$PsectAttributes_NOSHR$$" #NAME)
+#endif
+#else /* !VAX/VMS */
+#define GLOBALDATA(TYPE,NAME) extern TYPE NAME
+#endif
+#endif /* _COMPAT_ */