static void emitFromNativeConversion(
AsmBuilder builder,
SkinnyMethodAdapter mv,
FromNativeType fromNativeType,
Class nativeClass) {
// If there is a result converter, retrieve it and put on the stack
FromNativeConverter fromNativeConverter = fromNativeType.getFromNativeConverter();
if (fromNativeConverter != null) {
convertPrimitive(
mv,
nativeClass,
unboxedType(fromNativeConverter.nativeType()),
fromNativeType.getNativeType());
boxValue(builder, mv, fromNativeConverter.nativeType(), nativeClass);
Method fromNativeMethod = getFromNativeMethod(fromNativeType, builder.getClassLoader());
getfield(mv, builder, builder.getFromNativeConverterField(fromNativeConverter));
mv.swap();
if (fromNativeType.getFromNativeContext() != null) {
getfield(
mv, builder, builder.getFromNativeContextField(fromNativeType.getFromNativeContext()));
} else {
mv.aconst_null();
}
if (fromNativeMethod.getDeclaringClass().isInterface()) {
mv.invokeinterface(
fromNativeMethod.getDeclaringClass(),
fromNativeMethod.getName(),
fromNativeMethod.getReturnType(),
fromNativeMethod.getParameterTypes());
} else {
mv.invokevirtual(
fromNativeMethod.getDeclaringClass(),
fromNativeMethod.getName(),
fromNativeMethod.getReturnType(),
fromNativeMethod.getParameterTypes());
}
if (fromNativeType.getDeclaredType().isPrimitive()) {
// The actual return type is a primitive, but there was a converter for it - extract the
// primitive value
Class boxedType = getBoxedClass(fromNativeType.getDeclaredType());
if (!boxedType.isAssignableFrom(fromNativeMethod.getReturnType()))
mv.checkcast(p(boxedType));
unboxNumber(
mv, boxedType, fromNativeType.getDeclaredType(), fromNativeType.getNativeType());
} else if (!fromNativeType
.getDeclaredType()
.isAssignableFrom(fromNativeMethod.getReturnType())) {
mv.checkcast(p(fromNativeType.getDeclaredType()));
}
} else if (!fromNativeType.getDeclaredType().isPrimitive()) {
Class unboxedType = unboxedType(fromNativeType.getDeclaredType());
convertPrimitive(mv, nativeClass, unboxedType, fromNativeType.getNativeType());
boxValue(builder, mv, fromNativeType.getDeclaredType(), unboxedType);
}
}
static void emitToNativeConversion(
AsmBuilder builder, SkinnyMethodAdapter mv, ToNativeType toNativeType) {
ToNativeConverter parameterConverter = toNativeType.getToNativeConverter();
if (parameterConverter != null) {
Method toNativeMethod = getToNativeMethod(toNativeType, builder.getClassLoader());
if (toNativeType.getDeclaredType().isPrimitive()) {
boxValue(
builder,
mv,
getBoxedClass(toNativeType.getDeclaredType()),
toNativeType.getDeclaredType());
}
if (!toNativeMethod.getParameterTypes()[0].isAssignableFrom(
getBoxedClass(toNativeType.getDeclaredType()))) {
mv.checkcast(toNativeMethod.getParameterTypes()[0]);
}
mv.aload(0);
AsmBuilder.ObjectField toNativeConverterField =
builder.getToNativeConverterField(parameterConverter);
mv.getfield(
builder.getClassNamePath(),
toNativeConverterField.name,
ci(toNativeConverterField.klass));
if (!toNativeMethod.getDeclaringClass().equals(toNativeConverterField.klass)) {
mv.checkcast(toNativeMethod.getDeclaringClass());
}
// Re-order so the value to be converted is on the top of the stack
mv.swap();
// load context parameter (if there is one)
if (toNativeType.getToNativeContext() != null) {
getfield(mv, builder, builder.getToNativeContextField(toNativeType.getToNativeContext()));
} else {
mv.aconst_null();
}
if (toNativeMethod.getDeclaringClass().isInterface()) {
mv.invokeinterface(
toNativeMethod.getDeclaringClass(),
toNativeMethod.getName(),
toNativeMethod.getReturnType(),
toNativeMethod.getParameterTypes());
} else {
mv.invokevirtual(
toNativeMethod.getDeclaringClass(),
toNativeMethod.getName(),
toNativeMethod.getReturnType(),
toNativeMethod.getParameterTypes());
}
if (!parameterConverter.nativeType().isAssignableFrom(toNativeMethod.getReturnType())) {
mv.checkcast(p(parameterConverter.nativeType()));
}
}
}
static void unboxNumber(
final SkinnyMethodAdapter mv,
final Class boxedType,
final Class unboxedType,
final jnr.ffi.NativeType nativeType) {
if (Number.class.isAssignableFrom(boxedType)) {
switch (nativeType) {
case SCHAR:
case UCHAR:
mv.invokevirtual(p(boxedType), "byteValue", "()B");
convertPrimitive(mv, byte.class, unboxedType, nativeType);
break;
case SSHORT:
case USHORT:
mv.invokevirtual(p(boxedType), "shortValue", "()S");
convertPrimitive(mv, short.class, unboxedType, nativeType);
break;
case SINT:
case UINT:
case SLONG:
case ULONG:
case ADDRESS:
if (sizeof(nativeType) == 4) {
mv.invokevirtual(p(boxedType), "intValue", "()I");
convertPrimitive(mv, int.class, unboxedType, nativeType);
} else {
mv.invokevirtual(p(boxedType), "longValue", "()J");
convertPrimitive(mv, long.class, unboxedType, nativeType);
}
break;
case SLONGLONG:
case ULONGLONG:
mv.invokevirtual(p(boxedType), "longValue", "()J");
narrow(mv, long.class, unboxedType);
break;
case FLOAT:
mv.invokevirtual(p(boxedType), "floatValue", "()F");
break;
case DOUBLE:
mv.invokevirtual(p(boxedType), "doubleValue", "()D");
break;
}
} else if (Boolean.class.isAssignableFrom(boxedType)) {
unboxBoolean(mv, unboxedType);
} else {
throw new IllegalArgumentException("unsupported boxed type: " + boxedType);
}
}
static void unboxNumber(
final SkinnyMethodAdapter mv, final Class boxedType, final Class nativeType) {
if (Number.class.isAssignableFrom(boxedType)) {
if (byte.class == nativeType) {
mv.invokevirtual(p(boxedType), "byteValue", "()B");
} else if (short.class == nativeType) {
mv.invokevirtual(p(boxedType), "shortValue", "()S");
} else if (int.class == nativeType) {
mv.invokevirtual(p(boxedType), "intValue", "()I");
} else if (long.class == nativeType) {
mv.invokevirtual(p(boxedType), "longValue", "()J");
} else if (float.class == nativeType) {
mv.invokevirtual(p(boxedType), "floatValue", "()F");
} else if (double.class == nativeType) {
mv.invokevirtual(p(boxedType), "doubleValue", "()D");
} else {
throw new IllegalArgumentException("unsupported Number subclass: " + boxedType);
}
} else if (Boolean.class.isAssignableFrom(boxedType)) {
unboxBoolean(mv, nativeType);
} else {
throw new IllegalArgumentException("unsupported boxed type: " + boxedType);
}
}
static void unboxBoolean(final SkinnyMethodAdapter mv, Class boxedType, final Class nativeType) {
mv.invokevirtual(p(boxedType), "booleanValue", "()Z");
widen(mv, boolean.class, nativeType);
}