[llvm-objcopy] Factor out Buffer

In this diff we move out the hierarchy of buffers from Object.h/Object.cpp 
into separate files since it is not ELF-specific and will be reused later. 
After this change Object.h/Object.cpp are almost exclusively ELF-specific.

Test plan: make check-all

Differential revision: https://reviews.llvm.org/D53298

llvm-svn: 344585

1 files changed, 0 insertions, 31 deletions

diff --git a/llvm/tools/llvm-objcopy/Object.cpp b/llvm/tools/llvm-objcopy/Object.cpp
index ddf811a769b..d677579ea23 100644
--- a/llvm/tools/llvm-objcopy/Object.cpp
+++ b/llvm/tools/llvm-objcopy/Object.cpp
@@ -33,37 +33,6 @@ using namespace llvm::objcopy;
 using namespace object;
 using namespace ELF;
 
-Buffer::~Buffer() {}
-
-void FileBuffer::allocate(size_t Size) {
-  Expected<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
-      FileOutputBuffer::create(getName(), Size, FileOutputBuffer::F_executable);
-  handleAllErrors(BufferOrErr.takeError(), [this](const ErrorInfoBase &E) {
-    error("failed to open " + getName() + ": " + E.message());
-  });
-  Buf = std::move(*BufferOrErr);
-}
-
-Error FileBuffer::commit() { return Buf->commit(); }
-
-uint8_t *FileBuffer::getBufferStart() {
-  return reinterpret_cast<uint8_t *>(Buf->getBufferStart());
-}
-
-void MemBuffer::allocate(size_t Size) {
-  Buf = WritableMemoryBuffer::getNewMemBuffer(Size, getName());
-}
-
-Error MemBuffer::commit() { return Error::success(); }
-
-uint8_t *MemBuffer::getBufferStart() {
-  return reinterpret_cast<uint8_t *>(Buf->getBufferStart());
-}
-
-std::unique_ptr<WritableMemoryBuffer> MemBuffer::releaseMemoryBuffer() {
-  return std::move(Buf);
-}
-
 template <class ELFT> void ELFWriter<ELFT>::writePhdr(const Segment &Seg) {
   uint8_t *B = Buf.getBufferStart();
   B += Obj.ProgramHdrSegment.Offset + Seg.Index * sizeof(Elf_Phdr);