/* Copyright (c) 2007 Timothy Wall, All Rights Reserved
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package com.sun.jna.win32;
import java.lang.reflect.Method;
import java.nio.Buffer;
import java.nio.ByteBuffer;
import com.sun.jna.Callback;
import com.sun.jna.FunctionMapper;
import com.sun.jna.Native;
import com.sun.jna.NativeLibrary;
import com.sun.jna.NativeLong;
import com.sun.jna.NativeMapped;
import com.sun.jna.NativeMappedConverter;
import com.sun.jna.Pointer;
import com.sun.jna.PointerType;
import com.sun.jna.Structure;
import com.sun.jna.WString;
/** Provides mapping from simple method names to w32 stdcall-decorated names
* where the name suffix is "@" followed by the number of bytes popped by
* the called function.<p>
* NOTE: if you use custom type mapping for primitive types, you may need to
* override {@link #getArgumentNativeStackSize(Class)}.
*/
public class StdCallFunctionMapper implements FunctionMapper {
/** Override this to handle any custom class mappings. */
protected int getArgumentNativeStackSize(Class cls) {
if (NativeMapped.class.isAssignableFrom(cls)) {
cls = new NativeMappedConverter(cls).nativeType();
}
if (cls.isArray()) {
return Pointer.SIZE;
}
try {
return Native.getNativeSize(cls);
}
catch(IllegalArgumentException e) {
throw new IllegalArgumentException("Unknown native stack allocation size for " + cls);
}
}
/** Convert the given Java method into a decorated stdcall name,
* if possible.
*/
public String getFunctionName(NativeLibrary library, Method method) {
String name = method.getName();
int pop = 0;
Class[] argTypes = method.getParameterTypes();
for (int i=0;i < argTypes.length;i++) {
pop += getArgumentNativeStackSize(argTypes[i]);
}
String decorated = name + "@" + pop;
try {
name = library.getFunction(decorated, StdCallLibrary.STDCALL_CONVENTION).getName();
}
catch(UnsatisfiedLinkError e) {
// not found; let caller try undecorated version
}
return name;
}
}