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+/*
+ * Asterisk -- An open source telephony toolkit.
+ *
+ * Copyright (C) 1999 - 2005, Digium, Inc.
+ *
+ * Mark Spencer <markster@digium.com>
+ *
+ * See http://www.asterisk.org for more information about
+ * the Asterisk project. Please do not directly contact
+ * any of the maintainers of this project for assistance;
+ * the project provides a web site, mailing lists and IRC
+ * channels for your use.
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License Version 2. See the LICENSE file
+ * at the top of the source tree.
+ */
+
+/*! \file
+ * \brief Asterisk architecture endianess compatibility definitions
+ */
+
+#ifndef _ASTERISK_ENDIAN_H
+#define _ASTERISK_ENDIAN_H
+
+/*
+ * Autodetect system endianess
+ */
+
+#ifndef __BYTE_ORDER
+#ifdef __linux__
+#include <endian.h>
+#elif defined(__OpenBSD__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__APPLE__)
+#include <machine/endian.h>
+#define __BYTE_ORDER BYTE_ORDER
+#define __LITTLE_ENDIAN LITTLE_ENDIAN
+#define __BIG_ENDIAN BIG_ENDIAN
+#else
+
+#ifndef __LITTLE_ENDIAN
+#define __LITTLE_ENDIAN 1234
+#endif
+
+#ifndef __BIG_ENDIAN
+#define __BIG_ENDIAN 4321
+#endif
+
+#ifdef __LITTLE_ENDIAN__
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#endif /* __LITTLE_ENDIAN */
+
+#if defined(i386) || defined(__i386__)
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#endif /* defined i386 */
+
+#if defined(sun) && defined(unix) && defined(sparc)
+#define __BYTE_ORDER __BIG_ENDIAN
+#endif /* sun unix sparc */
+
+#endif /* linux */
+
+#endif /* __BYTE_ORDER */
+
+#ifndef __BYTE_ORDER
+#error Need to know endianess
+#endif /* __BYTE_ORDER */
+
+#endif /* _ASTERISK_ENDIAN_H */
+