/*
* Copyright 2016-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package com.facebook.buck.macho;
import com.google.common.primitives.UnsignedInteger;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
public class MachoMagicInfoUtils {
private MachoMagicInfoUtils() {}
/**
* Reads 4 bytes from the given byte buffer from position 0 and produces the MachoMagicInfo object
* which describes basic information about Mach Object file.
*
* @param buffer Byte Buffer which holds bytes for the mach header magic number.
* @return MachoMagicInfo object.
* @throws IOException
*/
public static MachoMagicInfo getMachMagicInfo(ByteBuffer buffer) {
ByteOrder order = buffer.order();
UnsignedInteger magic =
UnsignedInteger.fromIntBits(buffer.order(ByteOrder.BIG_ENDIAN).getInt());
buffer.order(order);
return new MachoMagicInfo(magic);
}
}