/*
* 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.facebook.buck.util.immutables.BuckStyleTuple;
import com.google.common.primitives.UnsignedInteger;
import org.immutables.value.Value;
/**
* This header file describes the structures of the file format for "fat" architecture specific file
* (wrapper design). At the begining of the file there is one fat_header structure followed by a
* number of fat_arch structures. For each architecture in the file, specified by a pair of cputype
* and cpusubtype, the fat_header describes the file offset, file size and alignment in the file of
* the architecture specific member. The padded bytes in the file to place each member on it's
* specific alignment are defined to be read as zeros and can be left as "holes" if the file system
* can support them as long as they read as zeros.
*
* <p>All structures defined here are always written and read to/from disk in big-endian order.
*/
@Value.Immutable
@BuckStyleTuple
interface AbstractFatArch {
/** @return file offset to this object file */
public Integer getCputype(); // 32 bit
/** @return machine specifier (int) */
public Integer getCpusubtype(); // 32 bit
/** @return file offset to this object file */
public UnsignedInteger getOffset(); // 32 bit
/** @return size of this object file */
public UnsignedInteger getSize(); // 32 bit
/** @return alignment as a power of 2 */
public UnsignedInteger getAlign(); // 32 bit
}