Initial

Mage/src/mage/util/FastByteArrayOutputStream.java

@@ -0,0 +1,115 @@
+/*
+* Copyright 2010 BetaSteward_at_googlemail.com. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without modification, are
+* permitted provided that the following conditions are met:
+*
+*    1. Redistributions of source code must retain the above copyright notice, this list of
+*       conditions and the following disclaimer.
+*
+*    2. Redistributions in binary form must reproduce the above copyright notice, this list
+*       of conditions and the following disclaimer in the documentation and/or other materials
+*       provided with the distribution.
+*
+* THIS SOFTWARE IS PROVIDED BY BetaSteward_at_googlemail.com ``AS IS'' AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BetaSteward_at_googlemail.com OR
+* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*
+* The views and conclusions contained in the software and documentation are those of the
+* authors and should not be interpreted as representing official policies, either expressed
+* or implied, of BetaSteward_at_googlemail.com.
+*/
+
+package mage.util;
+
+import java.io.InputStream;
+import java.io.OutputStream;
+
+/**
+ * ByteArrayOutputStream implementation that doesn't synchronize methods
+ * and doesn't copy the data on toByteArray().
+ */
+public class FastByteArrayOutputStream extends OutputStream {
+    /**
+     * Buffer and size
+     */
+    protected byte[] buf = null;
+    protected int size = 0;
+
+    /**
+     * Constructs a stream with buffer capacity size 5K
+     */
+    public FastByteArrayOutputStream() {
+        this(5 * 1024);
+    }
+
+    /**
+     * Constructs a stream with the given initial size
+     */
+    public FastByteArrayOutputStream(int initSize) {
+        this.size = 0;
+        this.buf = new byte[initSize];
+    }
+
+    /**
+     * Ensures that we have a large enough buffer for the given size.
+     */
+    private void verifyBufferSize(int sz) {
+        if (sz > buf.length) {
+            byte[] old = buf;
+            buf = new byte[Math.max(sz, 2 * buf.length )];
+            System.arraycopy(old, 0, buf, 0, old.length);
+            old = null;
+        }
+    }
+
+    public int getSize() {
+        return size;
+    }
+
+    /**
+     * Returns the byte array containing the written data. Note that this
+     * array will almost always be larger than the amount of data actually
+     * written.
+     */
+    public byte[] getByteArray() {
+        return buf;
+    }
+
+	@Override
+    public final void write(byte b[]) {
+        verifyBufferSize(size + b.length);
+        System.arraycopy(b, 0, buf, size, b.length);
+        size += b.length;
+    }
+
+	@Override
+    public final void write(byte b[], int off, int len) {
+        verifyBufferSize(size + len);
+        System.arraycopy(b, off, buf, size, len);
+        size += len;
+    }
+
+    public final void write(int b) {
+        verifyBufferSize(size + 1);
+        buf[size++] = (byte) b;
+    }
+
+    public void reset() {
+        size = 0;
+    }
+
+    /**
+     * Returns a ByteArrayInputStream for reading back the written data
+     */
+    public InputStream getInputStream() {
+        return new FastByteArrayInputStream(buf, size);
+    }
+
+}