1 files changed, 120 insertions, 0 deletions
diff --git a/src/share/classes/com/sun/org/apache/xalan/internal/xsltc/compiler/util/CompareGenerator.java b/src/share/classes/com/sun/org/apache/xalan/internal/xsltc/compiler/util/CompareGenerator.java
new file mode 100644
index 0000000..bb40dc1
--- /dev/null
+++ b/src/share/classes/com/sun/org/apache/xalan/internal/xsltc/compiler/util/CompareGenerator.java
@@ -0,0 +1,120 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/*
+ * Copyright 2001-2004 The Apache Software Foundation.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * $Id: CompareGenerator.java,v 1.2.4.1 2005/09/05 11:08:02 pvedula Exp $
+ */
+
+package com.sun.org.apache.xalan.internal.xsltc.compiler.util;
+
+import com.sun.org.apache.bcel.internal.generic.ACONST_NULL;
+import com.sun.org.apache.bcel.internal.generic.ALOAD;
+import com.sun.org.apache.bcel.internal.generic.ASTORE;
+import com.sun.org.apache.bcel.internal.generic.ConstantPoolGen;
+import com.sun.org.apache.bcel.internal.generic.ILOAD;
+import com.sun.org.apache.bcel.internal.generic.ISTORE;
+import com.sun.org.apache.bcel.internal.generic.Instruction;
+import com.sun.org.apache.bcel.internal.generic.InstructionList;
+import com.sun.org.apache.bcel.internal.generic.LocalVariableGen;
+import com.sun.org.apache.bcel.internal.generic.Type;
+import com.sun.org.apache.xalan.internal.xsltc.compiler.Constants;
+
+/**
+ * @author Jacek Ambroziak
+ * @author Santiago Pericas-Geertsen
+ */
+public final class CompareGenerator extends MethodGenerator {
+
+    private static int DOM_INDEX      = 1;
+    private static int CURRENT_INDEX  = 2;
+    private static int LEVEL_INDEX    = 3;
+    private static int TRANSLET_INDEX = 4;
+    private static int LAST_INDEX     = 5;
+    private int ITERATOR_INDEX = 6;
+
+    private final Instruction _iloadCurrent;
+    private final Instruction _istoreCurrent;
+    private final Instruction _aloadDom;
+    private final Instruction _iloadLast;
+    private final Instruction _aloadIterator;
+    private final Instruction _astoreIterator;
+
+    public CompareGenerator(int access_flags, Type return_type,
+                            Type[] arg_types, String[] arg_names,
+                            String method_name, String class_name,
+                            InstructionList il, ConstantPoolGen cp) {
+        super(access_flags, return_type, arg_types, arg_names, method_name,
+              class_name, il, cp);
+
+        _iloadCurrent = new ILOAD(CURRENT_INDEX);
+        _istoreCurrent = new ISTORE(CURRENT_INDEX);
+        _aloadDom = new ALOAD(DOM_INDEX);
+        _iloadLast = new ILOAD(LAST_INDEX);
+
+        LocalVariableGen iterator =
+            addLocalVariable("iterator",
+                             Util.getJCRefType(Constants.NODE_ITERATOR_SIG),
+                             null, null);
+        ITERATOR_INDEX = iterator.getIndex();
+        _aloadIterator = new ALOAD(ITERATOR_INDEX);
+        _astoreIterator = new ASTORE(ITERATOR_INDEX);
+        il.append(new ACONST_NULL());
+        il.append(storeIterator());
+    }
+
+    public Instruction loadLastNode() {
+        return _iloadLast;
+    }
+
+    public Instruction loadCurrentNode() {
+        return _iloadCurrent;
+    }
+
+    public Instruction storeCurrentNode() {
+        return _istoreCurrent;
+    }
+
+    public Instruction loadDOM() {
+        return _aloadDom;
+    }
+
+    public int getHandlerIndex() {
+        return INVALID_INDEX;           // not available
+    }
+
+    public int getIteratorIndex() {
+        return INVALID_INDEX;
+    }
+
+    public Instruction storeIterator() {
+        return _astoreIterator;
+    }
+
+    public Instruction loadIterator() {
+        return _aloadIterator;
+    }
+
+    //??? may not be used anymore
+    public int getLocalIndex(String name) {
+        if (name.equals("current")) {
+            return CURRENT_INDEX;
+        }
+        return super.getLocalIndex(name);
+    }
+}