1 files changed, 114 insertions, 0 deletions
diff --git a/storage/tokudb/PerconaFT/portability/toku_htod.h b/storage/tokudb/PerconaFT/portability/toku_htod.h
new file mode 100644
index 00000000000..a8a2f2a6f73
--- /dev/null
+++ b/storage/tokudb/PerconaFT/portability/toku_htod.h
@@ -0,0 +1,114 @@
+/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
+// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
+#ident "$Id$"
+/*======
+This file is part of PerconaFT.
+
+
+Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
+
+    PerconaFT is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License, version 2,
+    as published by the Free Software Foundation.
+
+    PerconaFT 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.
+
+    You should have received a copy of the GNU General Public License
+    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.
+
+----------------------------------------
+
+    PerconaFT is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License, version 3,
+    as published by the Free Software Foundation.
+
+    PerconaFT 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 Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with PerconaFT.  If not, see <http://www.gnu.org/licenses/>.
+======= */
+
+#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
+
+#pragma once
+
+/* 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.
+ */
+
+#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