--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.desktop/share/native/libfontmanager/layout/LESwaps.h Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,146 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+
+/*
+ *
+ * (C) Copyright IBM Corp. 1998-2010 - All Rights Reserved
+ *
+ */
+
+#ifndef __LESWAPS_H
+#define __LESWAPS_H
+
+#include "LETypes.h"
+
+/**
+ * \file
+ * \brief C++ API: Endian independent access to data for LayoutEngine
+ */
+
+U_NAMESPACE_BEGIN
+
+/**
+ * A convenience macro which invokes the swapWord member function
+ * from a concise call.
+ *
+ * @stable ICU 2.8
+ */
+#if defined(U_IS_BIG_ENDIAN)
+ #if U_IS_BIG_ENDIAN
+ #define SWAPW(value) (value)
+ #else
+ #define SWAPW(value) LESwaps::swapWord(value)
+ #endif
+#else
+ #define SWAPW(value) (LESwaps::isBigEndian() ? (value) : LESwaps::swapWord(value))
+#endif
+
+/**
+ * A convenience macro which invokes the swapLong member function
+ * from a concise call.
+ *
+ * @stable ICU 2.8
+ */
+#if defined(U_IS_BIG_ENDIAN)
+ #if U_IS_BIG_ENDIAN
+ #define SWAPL(value) (value)
+ #else
+ #define SWAPL(value) LESwaps::swapLong(value)
+ #endif
+#else
+ #define SWAPL(value) (LESwaps::isBigEndian() ? (value) : LESwaps::swapLong(value))
+#endif
+
+/**
+ * This class is used to access data which stored in big endian order
+ * regardless of the conventions of the platform. It has been designed
+ * to automatically detect the endian-ness of the platform, so that a
+ * compilation flag is not needed.
+ *
+ * All methods are static and inline in an attempt to induce the compiler
+ * to do most of the calculations at compile time.
+ *
+ * @stable ICU 2.8
+ */
+class U_LAYOUT_API LESwaps /* not : public UObject because all methods are static */ {
+public:
+
+#if !defined(U_IS_BIG_ENDIAN)
+ /**
+ * This method detects the endian-ness of the platform by
+ * casting a pointer to a word to a pointer to a byte. On
+ * big endian platforms the FF will be in the byte with the
+ * lowest address. On little endian platforms, the FF will
+ * be in the byte with the highest address.
+ *
+ * @return TRUE if the platform is big endian
+ *
+ * @stable ICU 2.8
+ */
+ static le_uint8 isBigEndian()
+ {
+ const le_uint16 word = 0xFF00;
+
+ return *((le_uint8 *) &word);
+ };
+#endif
+
+ /**
+ * This method does the byte swap required on little endian platforms
+ * to correctly access a (16-bit) word.
+ *
+ * @param value - the word to be byte swapped
+ *
+ * @return the byte swapped word
+ *
+ * @stable ICU 2.8
+ */
+ static le_uint16 swapWord(le_uint16 value)
+ {
+ return (((le_uint8) (value >> 8)) | (value << 8));
+ };
+
+ /**
+ * This method does the byte swapping required on little endian platforms
+ * to correctly access a (32-bit) long.
+ *
+ * @param value - the long to be byte swapped
+ *
+ * @return the byte swapped long
+ *
+ * @stable ICU 2.8
+ */
+ static le_uint32 swapLong(le_uint32 value)
+ {
+ return swapWord((le_uint16) (value >> 16)) | (swapWord((le_uint16) value) << 16);
+ };
+
+private:
+ LESwaps() {} // private - forbid instantiation
+};
+
+U_NAMESPACE_END
+#endif