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      1 /*
      2  * Copyright 2014, Google Inc.
      3  * All rights reserved.
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      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are
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     10  * notice, this list of conditions and the following disclaimer.
     11  *     * Redistributions in binary form must reproduce the above
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     13  * in the documentation and/or other materials provided with the
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     16  * contributors may be used to endorse or promote products derived from
     17  * this software without specific prior written permission.
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     19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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     21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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     29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 package org.jf.smalidea.psi.impl;
     33 
     34 import org.jetbrains.annotations.NotNull;
     35 import org.jf.smalidea.SmaliTokens;
     36 import org.jf.smalidea.psi.SmaliCompositeElementFactory;
     37 import org.jf.smalidea.psi.SmaliElementTypes;
     38 
     39 public class SmaliRegistersStatement extends SmaliCompositeElement {
     40     public static final SmaliCompositeElementFactory FACTORY = new SmaliCompositeElementFactory() {
     41         @Override public SmaliCompositeElement createElement() {
     42             return new SmaliRegistersStatement();
     43         }
     44     };
     45 
     46     public SmaliRegistersStatement() {
     47         super(SmaliElementTypes.REGISTERS_STATEMENT);
     48     }
     49 
     50     @NotNull
     51     private SmaliMethod getParentMethod() {
     52         return findAncestorByClass(SmaliMethod.class);
     53     }
     54 
     55     /**
     56      * Get the total number of registers for the method
     57      */
     58     public int getRegisterCount() {
     59         SmaliLiteral literal = findChildByClass(SmaliLiteral.class);
     60         assert literal != null;
     61 
     62         long registerCount = literal.getIntegralValue();
     63         // TODO: check for register count that's too large
     64         if (isLocals()) {
     65             SmaliMethod parentMethod = getParentMethod();
     66             return (int)registerCount + parentMethod.getParameterRegisterCount();
     67         }
     68         return (int)registerCount;
     69     }
     70 
     71     private boolean isLocals() {
     72         return findChildByType(SmaliTokens.LOCALS_DIRECTIVE) != null;
     73     }
     74 
     75 }
     76