001    /*
002     * Copyright 2010-2013 JetBrains s.r.o.
003     *
004     * Licensed under the Apache License, Version 2.0 (the "License");
005     * you may not use this file except in compliance with the License.
006     * You may obtain a copy of the License at
007     *
008     * http://www.apache.org/licenses/LICENSE-2.0
009     *
010     * Unless required by applicable law or agreed to in writing, software
011     * distributed under the License is distributed on an "AS IS" BASIS,
012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013     * See the License for the specific language governing permissions and
014     * limitations under the License.
015     */
016    
017    package org.jetbrains.jet.codegen.intrinsics;
018    
019    import com.intellij.psi.PsiElement;
020    import org.jetbrains.annotations.NotNull;
021    import org.jetbrains.asm4.Type;
022    import org.jetbrains.asm4.commons.InstructionAdapter;
023    import org.jetbrains.jet.codegen.ExpressionCodegen;
024    import org.jetbrains.jet.codegen.StackValue;
025    import org.jetbrains.jet.codegen.state.GenerationState;
026    import org.jetbrains.jet.lang.descriptors.ClassDescriptor;
027    import org.jetbrains.jet.lang.descriptors.FunctionDescriptor;
028    import org.jetbrains.jet.lang.psi.JetCallExpression;
029    import org.jetbrains.jet.lang.psi.JetExpression;
030    import org.jetbrains.jet.lang.psi.JetSimpleNameExpression;
031    import org.jetbrains.jet.lang.resolve.BindingContext;
032    import org.jetbrains.jet.lang.resolve.java.AsmTypeConstants;
033    import org.jetbrains.jet.lang.resolve.java.JvmPrimitiveType;
034    import org.jetbrains.jet.lang.resolve.name.FqName;
035    import org.jetbrains.jet.lang.types.lang.KotlinBuiltIns;
036    import org.jetbrains.jet.lang.types.lang.PrimitiveType;
037    
038    import java.util.List;
039    
040    import static org.jetbrains.jet.codegen.AsmUtil.asmDescByFqNameWithoutInnerClasses;
041    import static org.jetbrains.jet.lang.resolve.java.mapping.PrimitiveTypesUtil.asmTypeForPrimitive;
042    
043    public class ArrayIterator implements IntrinsicMethod {
044        @Override
045        public StackValue generate(
046                ExpressionCodegen codegen,
047                InstructionAdapter v,
048                @NotNull Type expectedType,
049                PsiElement element,
050                List<JetExpression> arguments,
051                StackValue receiver,
052                @NotNull GenerationState state
053        ) {
054            receiver.put(receiver.type, v);
055            JetCallExpression call = (JetCallExpression) element;
056            FunctionDescriptor funDescriptor = (FunctionDescriptor) codegen.getBindingContext()
057                    .get(BindingContext.REFERENCE_TARGET, (JetSimpleNameExpression) call.getCalleeExpression());
058            assert funDescriptor != null;
059            ClassDescriptor containingDeclaration = (ClassDescriptor) funDescriptor.getContainingDeclaration().getOriginal();
060            if (containingDeclaration.equals(KotlinBuiltIns.getInstance().getArray())) {
061                v.invokestatic("jet/runtime/ArrayIterator", "iterator", "([Ljava/lang/Object;)Ljava/util/Iterator;");
062                return StackValue.onStack(AsmTypeConstants.JET_ITERATOR_TYPE);
063            }
064    
065            for (JvmPrimitiveType jvmPrimitiveType : JvmPrimitiveType.values()) {
066                PrimitiveType primitiveType = jvmPrimitiveType.getPrimitiveType();
067                ClassDescriptor arrayClass = KotlinBuiltIns.getInstance().getPrimitiveArrayClassDescriptor(primitiveType);
068                if (containingDeclaration.equals(arrayClass)) {
069                    String iteratorDesc = asmDescByFqNameWithoutInnerClasses(new FqName("jet." + primitiveType.getTypeName() + "Iterator"));
070                    String methodSignature = "([" + asmTypeForPrimitive(jvmPrimitiveType) + ")" + iteratorDesc;
071                    v.invokestatic("jet/runtime/ArrayIterator", "iterator", methodSignature);
072                    return StackValue.onStack(Type.getType(iteratorDesc));
073                }
074            }
075    
076            throw new UnsupportedOperationException(containingDeclaration.toString());
077        }
078    }