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//===- MemoryArea.cpp -----------------------------------------------------===//
//
// The MCLinker Project
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include <mcld/Support/MemoryArea.h>
#include <mcld/Support/MsgHandling.h>
#include <llvm/Support/ErrorOr.h>
#include <cassert>
#include <system_error>
using namespace mcld;
//===--------------------------------------------------------------------===//
// MemoryArea
//===--------------------------------------------------------------------===//
MemoryArea::MemoryArea(llvm::StringRef pFilename)
{
llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> buffer_or_error =
llvm::MemoryBuffer::getFile(pFilename, /*FileSize*/ -1,
/*RequiresNullTerminator*/ false);
if (std::error_code ec = buffer_or_error.getError()) {
(void) ec;
fatal(diag::fatal_cannot_read_input) << pFilename.str();
}
m_pMemoryBuffer = std::move(buffer_or_error.get());
}
MemoryArea::MemoryArea(const char* pMemBuffer, size_t pSize)
{
llvm::StringRef mem(pMemBuffer, pSize);
llvm::MemoryBuffer* buffer =
llvm::MemoryBuffer::getMemBuffer(mem, /*BufferName*/ "NaN",
/*RequiresNullTerminator*/ false);
assert(buffer != NULL);
m_pMemoryBuffer.reset(buffer);
}
llvm::StringRef MemoryArea::request(size_t pOffset, size_t pLength)
{
return llvm::StringRef(m_pMemoryBuffer->getBufferStart() + pOffset, pLength);
}
size_t MemoryArea::size() const
{
return m_pMemoryBuffer->getBufferSize();
}
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