// Copyright (c) 2013-2014 Sandstorm Development Group, Inc. and contributors
// Licensed under the MIT License:
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package org.capnproto;

import java.nio.ByteBuffer;

final class FarPointer {
    public static int getSegmentId(long ref) {
        return WirePointer.upper32Bits(ref);
    }

    public static int positionInSegment(long ref) {
        return WirePointer.offsetAndKind(ref) >>> 3;
    }

    public static boolean isDoubleFar(long ref) {
        return ((WirePointer.offsetAndKind(ref) >>> 2) & 1) != 0;
    }

    public static void setSegmentId(ByteBuffer buffer, int offset, int segmentId) {
        buffer.putInt(8 * offset + 4, segmentId);
    }

    public static void set(ByteBuffer buffer, int offset, boolean isDoubleFar, int pos) {
        int idf = isDoubleFar ? 1 : 0;
        WirePointer.setOffsetAndKind(buffer, offset, (pos << 3) | (idf << 2) | WirePointer.FAR);
    }
}