forked from OSchip/llvm-project
45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
//===- DXContainer.cpp - DXContainer object file implementation -----------===//
|
|
//
|
|
// 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
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Object/DXContainer.h"
|
|
#include "llvm/BinaryFormat/DXContainer.h"
|
|
#include "llvm/Object/Error.h"
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::object;
|
|
|
|
static Error parseFailed(const Twine &Msg) {
|
|
return make_error<GenericBinaryError>(Msg.str(), object_error::parse_failed);
|
|
}
|
|
|
|
template <typename T>
|
|
static Error readStruct(StringRef Buffer, const char *P, T &Struct) {
|
|
// Don't read before the beginning or past the end of the file
|
|
if (P < Buffer.begin() || P + sizeof(T) > Buffer.end())
|
|
return parseFailed("Reading structure out of file bounds");
|
|
|
|
memcpy(&Struct, P, sizeof(T));
|
|
// DXContainer is always BigEndian
|
|
if (sys::IsBigEndianHost)
|
|
Struct.byteSwap();
|
|
return Error::success();
|
|
}
|
|
|
|
DXContainer::DXContainer(MemoryBufferRef O) : Data(O) {}
|
|
|
|
Error DXContainer::parseHeader() {
|
|
return readStruct(Data.getBuffer(), Data.getBuffer().data(), Header);
|
|
}
|
|
|
|
Expected<DXContainer> DXContainer::create(MemoryBufferRef Object) {
|
|
DXContainer Container(Object);
|
|
if (Error Err = Container.parseHeader())
|
|
return std::move(Err);
|
|
return Container;
|
|
}
|