--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/agent/src/share/classes/sun/jvm/hotspot/interpreter/BytecodeTableswitch.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2001-2003 Sun Microsystems, Inc.  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.
+ *
+ * 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+package sun.jvm.hotspot.interpreter;
+
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.utilities.*;
+
+public class BytecodeTableswitch extends Bytecode {
+  BytecodeTableswitch(Method method, int bci) {
+    super(method, bci);
+  }
+
+
+  // Attributes
+  public int  defaultOffset()     { return javaSignedWordAt(alignedOffset(1 + 0*jintSize)); }
+  public int  lowKey()            { return javaSignedWordAt(alignedOffset(1 + 1*jintSize)); }
+  public int  highKey()           { return javaSignedWordAt(alignedOffset(1 + 2*jintSize)); }
+  public int  length()            { return highKey()-lowKey()+1; }
+  public int  destOffsetAt(int i) {
+    int x2 = alignedOffset(1 + (3 + i)*jintSize);
+    int val = javaSignedWordAt(x2);
+    return javaSignedWordAt(alignedOffset(1 + (3 + i)*jintSize));
+  }
+
+  public void verify() {
+    if (Assert.ASSERTS_ENABLED) {
+      Assert.that(isValid(), "check tableswitch");
+    }
+  }
+
+  public boolean isValid() {
+    boolean result = javaCode() == Bytecodes._tableswitch;
+    if (result == false) return false;
+    int lo = lowKey();
+    int hi = highKey();
+    if (hi < lo) // incorrect hi/lo values in tableswitch
+       return false;
+
+    int i  = hi - lo - 1 ;
+    while (i-- > 0) {
+      // no special check needed
+    }
+    return true;
+  }
+
+  public static BytecodeTableswitch at(Method method, int bci) {
+    BytecodeTableswitch b = new BytecodeTableswitch(method, bci);
+    if (Assert.ASSERTS_ENABLED) {
+      b.verify();
+    }
+    return b;
+  }
+
+  /** Like at, but returns null if the BCI is not at tableswitch  */
+  public static BytecodeTableswitch atCheck(Method method, int bci) {
+    BytecodeTableswitch b = new BytecodeTableswitch(method, bci);
+    return (b.isValid() ? b : null);
+  }
+
+  public static BytecodeTableswitch at(BytecodeStream bcs) {
+    return new BytecodeTableswitch(bcs.method(), bcs.bci());
+  }
+
+  public String toString() {
+    StringBuffer buf = new StringBuffer();
+    buf.append("tableswitch");
+    buf.append(spaces);
+    buf.append("default: ");
+    buf.append(Integer.toString(bci() + defaultOffset()));
+    buf.append(comma);
+    int lo = lowKey();
+    int hi = highKey();
+    int i  = hi - lo - 1 ;
+    while (i-- > 0) {
+       buf.append("case ");
+       buf.append(Integer.toString(lo + i));
+       buf.append(':');
+       buf.append(Integer.toString(bci() + destOffsetAt(i)));
+       buf.append(comma);
+    }
+    return buf.toString();
+  }
+}