/*******************************************************************************
* Copyright (c) 2004, 2015 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Devin Steffler (IBM Corporation) - initial API and implementation
* Markus Schorn (Wind River Systems)
* Sergey Prigogin (Google)
*******************************************************************************/
package org.eclipse.cdt.internal.core.dom.parser.c;
import org.eclipse.cdt.core.dom.ast.IFunctionType;
import org.eclipse.cdt.core.dom.ast.IType;
import org.eclipse.cdt.core.dom.ast.ITypedef;
import org.eclipse.cdt.internal.core.dom.parser.ISerializableType;
import org.eclipse.cdt.internal.core.dom.parser.ITypeMarshalBuffer;
import org.eclipse.core.runtime.CoreException;
public class CFunctionType implements IFunctionType, ISerializableType {
private final IType[] parameters;
private final IType returnType;
private final boolean takesVarargs;
public CFunctionType(IType returnType, IType[] parameters) {
this(returnType, parameters, false);
}
public CFunctionType(IType returnType, IType[] parameters, boolean takesVarargs) {
this.returnType = returnType;
this.parameters = parameters;
this.takesVarargs = takesVarargs;
}
@Override
public boolean isSameType(IType o) {
if (o == this)
return true;
if (o instanceof ITypedef)
return o.isSameType(this);
if (o instanceof IFunctionType) {
IFunctionType ft = (IFunctionType) o;
IType[] fps;
fps = ft.getParameterTypes();
if (fps.length != parameters.length)
return false;
if (!returnType.isSameType(ft.getReturnType()))
return false;
for (int i = 0; i < parameters.length; i++) {
if (!parameters[i].isSameType(fps[i]))
return false;
}
return true;
}
return false;
}
@Override
public IType getReturnType() {
return returnType;
}
@Override
public IType[] getParameterTypes() {
return parameters;
}
@Override
public Object clone() {
IType t = null;
try {
t = (IType) super.clone();
} catch (CloneNotSupportedException e) {
//not going to happen
}
return t;
}
@Override
public void marshal(ITypeMarshalBuffer buffer) throws CoreException {
short firstBytes = ITypeMarshalBuffer.FUNCTION_TYPE;
if (takesVarargs) firstBytes |= ITypeMarshalBuffer.FLAG1;
int len= parameters.length & 0xffff;
int codedLen= len * ITypeMarshalBuffer.FLAG2;
if (codedLen < ITypeMarshalBuffer.LAST_FLAG) {
firstBytes |= codedLen;
buffer.putShort(firstBytes);
} else {
firstBytes |= ITypeMarshalBuffer.LAST_FLAG;
buffer.putShort(firstBytes);
buffer.putInt(len);
}
buffer.marshalType(returnType);
for (int i = 0; i < len; i++) {
buffer.marshalType(parameters[i]);
}
}
public static IType unmarshal(short firstBytes, ITypeMarshalBuffer buffer) throws CoreException {
int len;
if (((firstBytes & ITypeMarshalBuffer.LAST_FLAG) != 0)) {
len= buffer.getInt();
} else {
len= (firstBytes & (ITypeMarshalBuffer.LAST_FLAG - 1)) / ITypeMarshalBuffer.FLAG2;
}
IType rt= buffer.unmarshalType();
IType[] pars= new IType[len];
for (int i = 0; i < pars.length; i++) {
pars[i]= buffer.unmarshalType();
}
return new CFunctionType(rt, pars,
(firstBytes & ITypeMarshalBuffer.FLAG1) != 0); // takes varargs
}
@Override
public boolean takesVarArgs() {
return takesVarargs;
}
}