1 files changed, 151 insertions, 0 deletions
diff --git a/parser/html/javasrc/UTF16Buffer.java b/parser/html/javasrc/UTF16Buffer.java
new file mode 100644
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+++ b/parser/html/javasrc/UTF16Buffer.java
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+/*
+ * Copyright (c) 2008-2010 Mozilla Foundation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a 
+ * copy of this software and associated documentation files (the "Software"), 
+ * to deal in the Software without restriction, including without limitation 
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
+ * and/or sell copies of the Software, and to permit persons to whom the 
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in 
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
+ * DEALINGS IN THE SOFTWARE.
+ */
+
+package nu.validator.htmlparser.impl;
+
+import nu.validator.htmlparser.annotation.NoLength;
+
+/**
+ * An UTF-16 buffer that knows the start and end indeces of its unconsumed
+ * content.
+ * 
+ * @version $Id$
+ * @author hsivonen
+ */
+public final class UTF16Buffer {
+
+    /**
+     * The backing store of the buffer. May be larger than the logical content
+     * of this <code>UTF16Buffer</code>.
+     */
+    private final @NoLength char[] buffer;
+
+    /**
+     * The index of the first unconsumed character in the backing buffer.
+     */
+    private int start;
+
+    /**
+     * The index of the slot immediately after the last character in the backing
+     * buffer that is part of the logical content of this
+     * <code>UTF16Buffer</code>.
+     */
+    private int end;
+
+    //[NOCPP[
+    
+    /**
+     * Constructor for wrapping an existing UTF-16 code unit array.
+     * 
+     * @param buffer
+     *            the backing buffer
+     * @param start
+     *            the index of the first character to consume
+     * @param end
+     *            the index immediately after the last character to consume
+     */
+    public UTF16Buffer(@NoLength char[] buffer, int start, int end) {
+        this.buffer = buffer;
+        this.start = start;
+        this.end = end;
+    }
+
+    // ]NOCPP]
+    
+    /**
+     * Returns the start index.
+     * 
+     * @return the start index
+     */
+    public int getStart() {
+        return start;
+    }
+
+    /**
+     * Sets the start index.
+     * 
+     * @param start
+     *            the start index
+     */
+    public void setStart(int start) {
+        this.start = start;
+    }
+
+    /**
+     * Returns the backing buffer.
+     * 
+     * @return the backing buffer
+     */
+    public @NoLength char[] getBuffer() {
+        return buffer;
+    }
+
+    /**
+     * Returns the end index.
+     * 
+     * @return the end index
+     */
+    public int getEnd() {
+        return end;
+    }
+
+    /**
+     * Checks if the buffer has data left.
+     * 
+     * @return <code>true</code> if there's data left
+     */
+    public boolean hasMore() {
+        return start < end;
+    }
+
+    /**
+     * Returns <code>end - start</code>.
+     *
+     * @return <code>end - start</code>
+     */
+    public int getLength() {
+        return end - start;
+    }
+
+    /**
+     * Adjusts the start index to skip over the first character if it is a line
+     * feed and the previous character was a carriage return.
+     * 
+     * @param lastWasCR
+     *            whether the previous character was a carriage return
+     */
+    public void adjust(boolean lastWasCR) {
+        if (lastWasCR && buffer[start] == '\n') {
+            start++;
+        }
+    }
+
+    /**
+     * Sets the end index.
+     * 
+     * @param end
+     *            the end index
+     */
+    public void setEnd(int end) {
+        this.end = end;
+    }
+}