1 //===- MemoryArea.cpp -----------------------------------------------------===// 2 // 3 // The MCLinker Project 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 #include "mcld/Support/MemoryArea.h" 10 #include "mcld/Support/MsgHandling.h" 11 12 #include <llvm/Support/ErrorOr.h> 13 14 #include <cassert> 15 #include <system_error> 16 17 namespace mcld { 18 19 //===--------------------------------------------------------------------===// 20 // MemoryArea 21 //===--------------------------------------------------------------------===// 22 MemoryArea::MemoryArea(llvm::StringRef pFilename) { 23 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer> > buffer_or_error = 24 llvm::MemoryBuffer::getFile(pFilename, 25 /*FileSize*/ -1, 26 /*RequiresNullTerminator*/ false); 27 if (!buffer_or_error) { 28 fatal(diag::fatal_cannot_read_input) << pFilename.str(); 29 } 30 m_pMemoryBuffer = std::move(buffer_or_error.get()); 31 } 32 33 MemoryArea::MemoryArea(const char* pMemBuffer, size_t pSize) { 34 llvm::StringRef mem(pMemBuffer, pSize); 35 m_pMemoryBuffer = 36 llvm::MemoryBuffer::getMemBuffer(mem, 37 /*BufferName*/ "NaN", 38 /*RequiresNullTerminator*/ false); 39 } 40 41 llvm::StringRef MemoryArea::request(size_t pOffset, size_t pLength) { 42 return llvm::StringRef(m_pMemoryBuffer->getBufferStart() + pOffset, pLength); 43 } 44 45 size_t MemoryArea::size() const { 46 return m_pMemoryBuffer->getBufferSize(); 47 } 48 49 } // namespace mcld 50
