Mercurial > hg > graal-compiler
diff graal/com.oracle.truffle.interop/src/com/oracle/truffle/interop/ForeignAccessArguments.java @ 21013:556b6a4b36b2
Interop: add truffle.interop
author | Matthias Grimmer <grimmer@ssw.jku.at> |
---|---|
date | Mon, 20 Apr 2015 10:58:35 +0200 |
parents | |
children | ab451b6de9f8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.truffle.interop/src/com/oracle/truffle/interop/ForeignAccessArguments.java Mon Apr 20 10:58:35 2015 +0200 @@ -0,0 +1,78 @@ +/* + * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. Oracle designates this + * particular file as subject to the "Classpath" exception as provided + * by Oracle in the LICENSE file that accompanied this code. + * + * This code 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 General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + */ +package com.oracle.truffle.interop; + +import com.oracle.truffle.api.*; + +public final class ForeignAccessArguments { + public static final Object[] EMPTY_ARGUMENTS_ARRAY = new Object[0]; + public static final int RECEIVER_INDEX = 0; + public static final int RUNTIME_ARGUMENT_COUNT = 1; + + public static Object[] create(Object receiver) { + return new Object[]{receiver}; + } + + public static Object[] create(Object receiver, Object[] arguments) { + Object[] objectArguments = new Object[RUNTIME_ARGUMENT_COUNT + arguments.length]; + objectArguments[RECEIVER_INDEX] = receiver; + arraycopy(arguments, 0, objectArguments, RUNTIME_ARGUMENT_COUNT, arguments.length); + return objectArguments; + } + + public static Object getArgument(Object[] arguments, int index) { + return arguments[RUNTIME_ARGUMENT_COUNT + index]; + } + + public static Object getReceiver(Object[] arguments) { + return arguments[RECEIVER_INDEX]; + } + + public static Object[] extractUserArguments(Object[] arguments) { + return copyOfRange(arguments, RUNTIME_ARGUMENT_COUNT, arguments.length); + } + + public static int getUserArgumentCount(Object[] arguments) { + return arguments.length - RUNTIME_ARGUMENT_COUNT; + } + + private static Object[] copyOfRange(Object[] original, int from, int to) { + int newLength = to - from; + if (newLength < 0) { + CompilerDirectives.transferToInterpreter(); + throw new IllegalArgumentException(from + " > " + to); + } + Object[] copy = new Object[newLength]; + arraycopy(original, from, copy, 0, Math.min(original.length - from, newLength)); + return copy; + } + + private static void arraycopy(Object[] src, int srcPos, Object[] dest, int destPos, int length) { + for (int i = 0; i < length; i++) { + dest[destPos + i] = src[srcPos + i]; + } + } + +}