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// Copyright 2020 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef BASE_MAC_MACH_O_H_
#define BASE_MAC_MACH_O_H_
#include <mach-o/fat.h>
#include <mach-o/loader.h>
#include <stdint.h>
#include <type_traits>
#include "base/base_export.h"
#include "base/files/file_path.h"
namespace base {
// The return value of MachOArchitectures.
enum class MachOArchitectures : uint32_t {
// Corresponds to cpu_type_t CPU_TYPE_X86_64.
kX86_64 = 1 << 0,
// Corresponds to cpu_type_t CPU_TYPE_ARM64.
kARM64 = 1 << 1,
// A Mach-O file with an architecture other than one of those listed above.
kUnknownArchitecture = 1 << 29,
// Not a Mach-O file. This bit may only appear alone.
kInvalidFormat = 1 << 30,
// Not a file at all. This bit may only appear alone.
kFileError = 1 << 31,
};
// MachOArchitectures is an enum class for better namespacing, but it’s treated
// as a bitfield, so define a few operators to make it easier to work with.
inline constexpr MachOArchitectures operator&(MachOArchitectures a,
MachOArchitectures b) {
using UnderlyingType = std::underlying_type<MachOArchitectures>::type;
return static_cast<MachOArchitectures>(static_cast<UnderlyingType>(a) &
static_cast<UnderlyingType>(b));
}
inline constexpr MachOArchitectures operator|(MachOArchitectures a,
MachOArchitectures b) {
using UnderlyingType = std::underlying_type<MachOArchitectures>::type;
return static_cast<MachOArchitectures>(static_cast<UnderlyingType>(a) |
static_cast<UnderlyingType>(b));
}
inline constexpr MachOArchitectures operator|=(MachOArchitectures& a,
MachOArchitectures b) {
a = a | b;
return a;
}
// Determines the CPU architecture of a Mach-O file, or the CPU architectures of
// a fat file.
//
// This only considers the mach_header[_64]::cputype field of (thin) Mach-O
// files, and the fat_arch[_64]::cputype fields of fat files. For a fat file,
// more than one bit may be set in the return value.
BASE_EXPORT MachOArchitectures GetMachOArchitectures(const FilePath& path);
} // namespace base
#endif // BASE_MAC_MACH_O_H_
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