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+/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
+#ident "$Id$"
+/*
+COPYING CONDITIONS NOTICE:
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of version 2 of the GNU General Public License as
+ published by the Free Software Foundation, and provided that the
+ following conditions are met:
+
+ * Redistributions of source code must retain this COPYING
+ CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
+ DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the
+ PATENT MARKING NOTICE (below), and the PATENT RIGHTS
+ GRANT (below).
+
+ * Redistributions in binary form must reproduce this COPYING
+ CONDITIONS NOTICE, the COPYRIGHT NOTICE (below), the
+ DISCLAIMER (below), the UNIVERSITY PATENT NOTICE (below), the
+ PATENT MARKING NOTICE (below), and the PATENT RIGHTS
+ GRANT (below) in the documentation and/or other materials
+ provided with the distribution.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ 02110-1301, USA.
+
+COPYRIGHT NOTICE:
+
+ TokuDB, Tokutek Fractal Tree Indexing Library.
+ Copyright (C) 2007-2013 Tokutek, Inc.
+
+DISCLAIMER:
+
+ This program is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ General Public License for more details.
+
+UNIVERSITY PATENT NOTICE:
+
+ The technology is licensed by the Massachusetts Institute of
+ Technology, Rutgers State University of New Jersey, and the Research
+ Foundation of State University of New York at Stony Brook under
+ United States of America Serial No. 11/760379 and to the patents
+ and/or patent applications resulting from it.
+
+PATENT MARKING NOTICE:
+
+ This software is covered by US Patent No. 8,185,551.
+ This software is covered by US Patent No. 8,489,638.
+
+PATENT RIGHTS GRANT:
+
+ "THIS IMPLEMENTATION" means the copyrightable works distributed by
+ Tokutek as part of the Fractal Tree project.
+
+ "PATENT CLAIMS" means the claims of patents that are owned or
+ licensable by Tokutek, both currently or in the future; and that in
+ the absence of this license would be infringed by THIS
+ IMPLEMENTATION or by using or running THIS IMPLEMENTATION.
+
+ "PATENT CHALLENGE" shall mean a challenge to the validity,
+ patentability, enforceability and/or non-infringement of any of the
+ PATENT CLAIMS or otherwise opposing any of the PATENT CLAIMS.
+
+ Tokutek hereby grants to you, for the term and geographical scope of
+ the PATENT CLAIMS, a non-exclusive, no-charge, royalty-free,
+ irrevocable (except as stated in this section) patent license to
+ make, have made, use, offer to sell, sell, import, transfer, and
+ otherwise run, modify, and propagate the contents of THIS
+ IMPLEMENTATION, where such license applies only to the PATENT
+ CLAIMS. This grant does not include claims that would be infringed
+ only as a consequence of further modifications of THIS
+ IMPLEMENTATION. If you or your agent or licensee institute or order
+ or agree to the institution of patent litigation against any entity
+ (including a cross-claim or counterclaim in a lawsuit) alleging that
+ THIS IMPLEMENTATION constitutes direct or contributory patent
+ infringement, or inducement of patent infringement, then any rights
+ granted to you under this License shall terminate as of the date
+ such litigation is filed. If you or your agent or exclusive
+ licensee institute or order or agree to the institution of a PATENT
+ CHALLENGE, then Tokutek may terminate any rights granted to you
+ under this License.
+*/
+
+#ident "Copyright (c) 2007-2013 Tokutek Inc. All rights reserved."
+
+
+/* Purpose of this file is to provide definitions of
+ * Host to Disk byte transposition functions, an abstraction of
+ * htod32()/dtoh32() and htod16()/dtoh16() functions.
+ *
+ * These htod/dtoh functions will only perform the transposition
+ * if the disk and host are defined to be in opposite endian-ness.
+ * If we define the disk to be in host order, then no byte
+ * transposition is performed. (We might do this to save the
+ * the time used for byte transposition.)
+ *
+ * This abstraction layer allows us to define the disk to be in
+ * any byte order with a single compile-time switch (in htod.c).
+ *
+ * NOTE: THIS FILE DOES NOT CURRENTLY SUPPORT A BIG-ENDIAN
+ * HOST AND A LITTLE-ENDIAN DISK.
+ */
+
+#ifndef _TOKU_HTOD_H
+#define _TOKU_HTOD_H
+
+#include <portability/toku_config.h>
+
+#if defined(HAVE_ENDIAN_H)
+# include <endian.h>
+#elif defined(HAVE_MACHINE_ENDIAN_H)
+# include <machine/endian.h>
+# define __BYTE_ORDER __DARWIN_BYTE_ORDER
+# define __LITTLE_ENDIAN __DARWIN_LITTLE_ENDIAN
+# define __BIG_ENDIAN __DARWIN_BIG_ENDIAN
+#endif
+#if !defined(__BYTE_ORDER) || \
+ !defined(__LITTLE_ENDIAN) || \
+ !defined(__BIG_ENDIAN)
+#error Standard endianness things not all defined
+#endif
+
+
+static const int64_t toku_byte_order_host = 0x0102030405060708LL;
+
+#define NETWORK_BYTE_ORDER (__BIG_ENDIAN)
+#define INTEL_BYTE_ORDER (__LITTLE_ENDIAN)
+#define HOST_BYTE_ORDER (__BYTE_ORDER)
+
+//DISK_BYTE_ORDER is the byte ordering for integers written to disk.
+//If DISK_BYTE_ORDER is the same as HOST_BYTE_ORDER no conversions are necessary.
+//Otherwise some structures require conversion to HOST_BYTE_ORDER on loading from disk (HOST_BYTE_ORDER in memory), and
+//others require conversion to HOST_BYTE_ORDER on every access/mutate (DISK_BYTE_ORDER in memory).
+#define DISK_BYTE_ORDER (INTEL_BYTE_ORDER)
+
+#if HOST_BYTE_ORDER!=INTEL_BYTE_ORDER
+//Even though the functions are noops if DISK==HOST, we do not have the logic to test whether the file was moved from another BYTE_ORDER machine.
+#error Only intel byte order supported so far.
+#endif
+
+#if DISK_BYTE_ORDER == HOST_BYTE_ORDER
+static inline uint64_t
+toku_dtoh64(uint64_t i) {
+ return i;
+}
+
+static inline uint64_t
+toku_htod64(uint64_t i) {
+ return i;
+}
+
+static inline uint32_t
+toku_dtoh32(uint32_t i) {
+ return i;
+}
+
+static inline uint32_t
+toku_htod32(uint32_t i) {
+ return i;
+}
+#else
+#error Not supported
+#endif
+
+
+
+#endif
+