Initial

Mage/src/mage/util/FastByteArrayInputStream.java

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+/*
+* 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;
+
+/**
+ * ByteArrayInputStream implementation that does not synchronize methods.
+ */
+public class FastByteArrayInputStream extends InputStream {
+    /**
+     * Our byte buffer
+     */
+    protected byte[] buf = null;
+
+    /**
+     * Number of bytes that we can read from the buffer
+     */
+    protected int count = 0;
+
+    /**
+     * Number of bytes that have been read from the buffer
+     */
+    protected int pos = 0;
+
+    public FastByteArrayInputStream(byte[] buf, int count) {
+        this.buf = buf;
+        this.count = count;
+    }
+
+	@Override
+    public final int available() {
+        return count - pos;
+    }
+
+    public final int read() {
+        return (pos < count) ? (buf[pos++] & 0xff) : -1;
+    }
+
+	@Override
+    public final int read(byte[] b, int off, int len) {
+        if (pos >= count)
+            return -1;
+
+        if ((pos + len) > count)
+            len = (count - pos);
+
+        System.arraycopy(buf, pos, b, off, len);
+        pos += len;
+        return len;
+    }
+
+	@Override
+    public final long skip(long n) {
+        if ((pos + n) > count)
+            n = count - pos;
+        if (n < 0)
+            return 0;
+        pos += n;
+        return n;
+    }
+
+}