text: //===- Binary.cpp - A generic binary file ---------------------------------===//
  //
  // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  // See https://llvm.org/LICENSE.txt for license information.
  // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  //
  //===----------------------------------------------------------------------===//
  //
  // This file defines the Binary class.
  //
  //===----------------------------------------------------------------------===//
  
  #include "llvm/Object/Binary.h"
  #include "llvm/ADT/StringRef.h"
  #include "llvm/BinaryFormat/Magic.h"
  #include "llvm/Object/Archive.h"
  #include "llvm/Object/Error.h"
  #include "llvm/Object/MachOUniversal.h"
  #include "llvm/Object/Minidump.h"
  #include "llvm/Object/ObjectFile.h"
  #include "llvm/Object/WindowsResource.h"
  #include "llvm/Support/Error.h"
  #include "llvm/Support/ErrorHandling.h"
  #include "llvm/Support/ErrorOr.h"
  #include "llvm/Support/FileSystem.h"
  #include "llvm/Support/MemoryBuffer.h"
  #include <algorithm>
  #include <memory>
  #include <system_error>
  
  using namespace llvm;
  using namespace object;
  
  Binary::~Binary() = default;
  
  Binary::Binary(unsigned int Type, MemoryBufferRef Source)
      : TypeID(Type), Data(Source) {}
  
  StringRef Binary::getData() const { return Data.getBuffer(); }
  
  StringRef Binary::getFileName() const { return Data.getBufferIdentifier(); }
  
  MemoryBufferRef Binary::getMemoryBufferRef() const { return Data; }
  
  Expected<std::unique_ptr<Binary>> object::createBinary(MemoryBufferRef Buffer,
                                                        LLVMContext *Context) {
    file_magic Type = identify_magic(Buffer.getBuffer());
  
    switch (Type) {
    case file_magic::archive:
      return Archive::create(Buffer);
    case file_magic::elf:
    case file_magic::elf_relocatable:
    case file_magic::elf_executable:
    case file_magic::elf_shared_object:
    case file_magic::elf_core:
    case file_magic::macho_object:
    case file_magic::macho_executable:
    case file_magic::macho_fixed_virtual_memory_shared_lib:
    case file_magic::macho_core:
    case file_magic::macho_preload_executable:
    case file_magic::macho_dynamically_linked_shared_lib:
    case file_magic::macho_dynamic_linker:
    case file_magic::macho_bundle:
    case file_magic::macho_dynamically_linked_shared_lib_stub:
    case file_magic::macho_dsym_companion:
    case file_magic::macho_kext_bundle:
    case file_magic::coff_object:
    case file_magic::coff_import_library:
    case file_magic::pecoff_executable:
    case file_magic::bitcode:
    case file_magic::xcoff_object_32:
    case file_magic::wasm_object:
      return ObjectFile::createSymbolicFile(Buffer, Type, Context);
    case file_magic::macho_universal_binary:
      return MachOUniversalBinary::create(Buffer);
    case file_magic::windows_resource:
      return WindowsResource::createWindowsResource(Buffer);
    case file_magic::pdb:
      // PDB does not support the Binary interface.
      return errorCodeToError(object_error::invalid_file_type);
    case file_magic::unknown:
    case file_magic::coff_cl_gl_object:
      // Unrecognized object file format.
      return errorCodeToError(object_error::invalid_file_type);
    case file_magic::minidump:
      return MinidumpFile::create(Buffer);
    }
    llvm_unreachable("Unexpected Binary File Type");
  }
  
  Expected<OwningBinary<Binary>> object::createBinary(StringRef Path) {
    ErrorOr<std::unique_ptr<MemoryBuffer>> FileOrErr =
        MemoryBuffer::getFileOrSTDIN(Path, /*FileSize=*/-1,
                                     /*RequiresNullTerminator=*/false);
    if (std::error_code EC = FileOrErr.getError())
      return errorCodeToError(EC);
    std::unique_ptr<MemoryBuffer> &Buffer = FileOrErr.get();
  
    Expected<std::unique_ptr<Binary>> BinOrErr =
        createBinary(Buffer->getMemBufferRef());
    if (!BinOrErr)
      return BinOrErr.takeError();
    std::unique_ptr<Binary> &Bin = BinOrErr.get();
  
    return OwningBinary<Binary>(std::move(Bin), std::move(Buffer));
  }
  