8187443: Forest Consolidation: Move files to unified layout

Reviewed-by: darcy, ihse

src/java.base/share/classes/java/nio/CharBufferSpliterator.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2013, 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.nio;
+
+import java.util.Comparator;
+import java.util.Spliterator;
+import java.util.function.IntConsumer;
+
+/**
+ * A Spliterator.OfInt for sources that traverse and split elements
+ * maintained in a CharBuffer.
+ *
+ * @implNote
+ * The implementation is based on the code for the Array-based spliterators.
+ */
+class CharBufferSpliterator implements Spliterator.OfInt {
+    private final CharBuffer buffer;
+    private int index;   // current index, modified on advance/split
+    private final int limit;
+
+    CharBufferSpliterator(CharBuffer buffer) {
+        this(buffer, buffer.position(), buffer.limit());
+    }
+
+    CharBufferSpliterator(CharBuffer buffer, int origin, int limit) {
+        assert origin <= limit;
+        this.buffer = buffer;
+        this.index = (origin <= limit) ? origin : limit;
+        this.limit = limit;
+    }
+
+    @Override
+    public OfInt trySplit() {
+        int lo = index, mid = (lo + limit) >>> 1;
+        return (lo >= mid)
+               ? null
+               : new CharBufferSpliterator(buffer, lo, index = mid);
+    }
+
+    @Override
+    public void forEachRemaining(IntConsumer action) {
+        if (action == null)
+            throw new NullPointerException();
+        CharBuffer cb = buffer;
+        int i = index;
+        int hi = limit;
+        index = hi;
+        while (i < hi) {
+            action.accept(cb.getUnchecked(i++));
+        }
+    }
+
+    @Override
+    public boolean tryAdvance(IntConsumer action) {
+        if (action == null)
+            throw new NullPointerException();
+        if (index >= 0 && index < limit) {
+            action.accept(buffer.getUnchecked(index++));
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public long estimateSize() {
+        return (long)(limit - index);
+    }
+
+    @Override
+    public int characteristics() {
+        return Buffer.SPLITERATOR_CHARACTERISTICS;
+    }
+}