8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/share/classes/java/io/Bits.java

@@ -0,0 +1,123 @@
+/*
+ * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
+ * 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.
+ */
+
+package java.io;
+
+/**
+ * Utility methods for packing/unpacking primitive values in/out of byte arrays
+ * using big-endian byte ordering.
+ */
+class Bits {
+
+    /*
+     * Methods for unpacking primitive values from byte arrays starting at
+     * given offsets.
+     */
+
+    static boolean getBoolean(byte[] b, int off) {
+        return b[off] != 0;
+    }
+
+    static char getChar(byte[] b, int off) {
+        return (char) ((b[off + 1] & 0xFF) +
+                       (b[off] << 8));
+    }
+
+    static short getShort(byte[] b, int off) {
+        return (short) ((b[off + 1] & 0xFF) +
+                        (b[off] << 8));
+    }
+
+    static int getInt(byte[] b, int off) {
+        return ((b[off + 3] & 0xFF)      ) +
+               ((b[off + 2] & 0xFF) <<  8) +
+               ((b[off + 1] & 0xFF) << 16) +
+               ((b[off    ]       ) << 24);
+    }
+
+    static float getFloat(byte[] b, int off) {
+        return Float.intBitsToFloat(getInt(b, off));
+    }
+
+    static long getLong(byte[] b, int off) {
+        return ((b[off + 7] & 0xFFL)      ) +
+               ((b[off + 6] & 0xFFL) <<  8) +
+               ((b[off + 5] & 0xFFL) << 16) +
+               ((b[off + 4] & 0xFFL) << 24) +
+               ((b[off + 3] & 0xFFL) << 32) +
+               ((b[off + 2] & 0xFFL) << 40) +
+               ((b[off + 1] & 0xFFL) << 48) +
+               (((long) b[off])      << 56);
+    }
+
+    static double getDouble(byte[] b, int off) {
+        return Double.longBitsToDouble(getLong(b, off));
+    }
+
+    /*
+     * Methods for packing primitive values into byte arrays starting at given
+     * offsets.
+     */
+
+    static void putBoolean(byte[] b, int off, boolean val) {
+        b[off] = (byte) (val ? 1 : 0);
+    }
+
+    static void putChar(byte[] b, int off, char val) {
+        b[off + 1] = (byte) (val      );
+        b[off    ] = (byte) (val >>> 8);
+    }
+
+    static void putShort(byte[] b, int off, short val) {
+        b[off + 1] = (byte) (val      );
+        b[off    ] = (byte) (val >>> 8);
+    }
+
+    static void putInt(byte[] b, int off, int val) {
+        b[off + 3] = (byte) (val       );
+        b[off + 2] = (byte) (val >>>  8);
+        b[off + 1] = (byte) (val >>> 16);
+        b[off    ] = (byte) (val >>> 24);
+    }
+
+    static void putFloat(byte[] b, int off, float val) {
+        putInt(b, off,  Float.floatToIntBits(val));
+    }
+
+    static void putLong(byte[] b, int off, long val) {
+        b[off + 7] = (byte) (val       );
+        b[off + 6] = (byte) (val >>>  8);
+        b[off + 5] = (byte) (val >>> 16);
+        b[off + 4] = (byte) (val >>> 24);
+        b[off + 3] = (byte) (val >>> 32);
+        b[off + 2] = (byte) (val >>> 40);
+        b[off + 1] = (byte) (val >>> 48);
+        b[off    ] = (byte) (val >>> 56);
+    }
+
+    static void putDouble(byte[] b, int off, double val) {
+        putLong(b, off, Double.doubleToLongBits(val));
+    }
+}