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