001/**
002 *
003 * Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
004 *
005 * This library is free software; you can redistribute it and/or
006 * modify it under the terms of the GNU Lesser General Public
007 * License as published by the Free Software Foundation; either 
008 * version 2.1 of the License, or (at your option) any later version.
009 * 
010 * This library is distributed in the hope that it will be useful,
011 * but WITHOUT ANY WARRANTY; without even the implied warranty of
012 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
013 * Lesser General Public License for more details.
014 * 
015 * You should have received a copy of the GNU Lesser General Public 
016 * License along with this library.  If not, see <http://www.gnu.org/licenses/>.
017 * 
018 **/
019package lucee.transformer.bytecode.cast;
020
021import lucee.runtime.exp.TemplateException;
022import lucee.transformer.bytecode.BytecodeContext;
023import lucee.transformer.bytecode.BytecodeException;
024import lucee.transformer.bytecode.Literal;
025import lucee.transformer.bytecode.expression.ExprInt;
026import lucee.transformer.bytecode.expression.ExprString;
027import lucee.transformer.bytecode.expression.Expression;
028import lucee.transformer.bytecode.expression.ExpressionBase;
029import lucee.transformer.bytecode.literal.LitInteger;
030import lucee.transformer.bytecode.util.Methods;
031import lucee.transformer.bytecode.util.Types;
032
033import org.objectweb.asm.Type;
034import org.objectweb.asm.commons.GeneratorAdapter;
035import org.objectweb.asm.commons.Method;
036
037/**
038 * cast a Expression to a Double
039 */
040public final class CastInt extends ExpressionBase implements ExprInt,Cast {
041    
042    private Expression expr;
043    
044    private CastInt(Expression expr) {
045        super(expr.getStart(),expr.getEnd());
046        this.expr=expr;
047    }
048    
049    /**
050     * Create a String expression from a Expression
051     * @param expr
052     * @return String expression
053     * @throws TemplateException 
054     */
055    public static ExprInt toExprInt(Expression expr)  {
056        if(expr instanceof ExprInt) return (ExprInt) expr;
057        if(expr instanceof Literal) {
058            Double dbl = ((Literal)expr).getDouble(null);
059            if(dbl!=null) return new LitInteger((int)dbl.doubleValue(),expr.getStart(),expr.getEnd());
060        }
061        return new CastInt(expr);
062    }
063
064    /**
065     * @see lucee.transformer.bytecode.expression.Expression#_writeOut(org.objectweb.asm.commons.GeneratorAdapter, int)
066     */
067    public Type _writeOut(BytecodeContext bc, int mode) throws BytecodeException {
068        GeneratorAdapter adapter = bc.getAdapter();
069
070        if(expr instanceof ExprString) {
071            expr.writeOut(bc,MODE_REF);
072            if(mode==MODE_VALUE)adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_INT_VALUE_FROM_STRING);
073            else adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_INTEGER_FROM_STRING);
074        }
075        else {
076                Type rtn = expr.writeOut(bc,mode);
077                if(mode==MODE_VALUE) {
078                        if(!Types.isPrimitiveType(rtn)) {
079                                adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_INT_VALUE);
080                        }
081                        else if(Types.BOOLEAN_VALUE.equals(rtn))        {
082                                adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_INT_VALUE_FROM_BOOLEAN);
083                        }
084                        else if(Types.SHORT_VALUE.equals(rtn))  {
085                                // No Cast needed
086                        }
087                        else if(Types.FLOAT_VALUE.equals(rtn))  {
088                                adapter.cast(Types.FLOAT_VALUE, Types.INT_VALUE);
089                        }
090                        else if(Types.LONG_VALUE.equals(rtn))   {
091                                adapter.cast(Types.LONG_VALUE, Types.INT_VALUE);
092                        }
093                        else if(Types.DOUBLE_VALUE.equals(rtn)) {
094                                adapter.cast(Types.DOUBLE_VALUE, Types.INT_VALUE);
095                        }
096                        else if(Types.INT_VALUE.equals(rtn))    {
097                                // No Cast needed
098                        }
099                        else {
100                                adapter.invokeStatic(Types.CASTER,new Method("toRef",Types.toRefType(rtn),new Type[]{rtn}));
101                                adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_INT_VALUE);
102                        }
103                        return Types.INT_VALUE;
104                        
105                        
106                }
107                else if(Types.isPrimitiveType(rtn))     {
108                        if(Types.DOUBLE_VALUE.equals(rtn))      {
109                                adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_INTEGER_FROM_DOUBLE);
110                        }
111                        else if(Types.BOOLEAN_VALUE.equals(rtn))        {
112                                adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_INTEGER_FROM_BOOLEAN);
113                        }
114                        else {
115                                adapter.invokeStatic(Types.CASTER,new Method("toRef",Types.toRefType(rtn),new Type[]{rtn}));
116                                adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_INTEGER);
117                        }
118                        return Types.INTEGER;
119                }
120                
121                if(!Types.INTEGER.equals(rtn)) adapter.invokeStatic(Types.CASTER,Methods.METHOD_TO_INTEGER);
122                return Types.INTEGER;
123        }
124        
125
126        if(mode==MODE_VALUE)return Types.INT_VALUE;
127        return Types.INTEGER;
128    }
129
130        @Override
131        public Expression getExpr() {
132                return expr;
133        }
134}
135
136
137
138