71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
//===--- DataBufferLLVM.cpp -------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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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 "lldb/Utility/DataBufferLLVM.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include <assert.h> // for assert
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#include <type_traits> // for move
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using namespace lldb_private;
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DataBufferLLVM::DataBufferLLVM(std::unique_ptr<llvm::MemoryBuffer> MemBuffer)
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: Buffer(std::move(MemBuffer)) {
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assert(Buffer != nullptr &&
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"Cannot construct a DataBufferLLVM with a null buffer");
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}
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DataBufferLLVM::~DataBufferLLVM() {}
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std::shared_ptr<DataBufferLLVM>
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DataBufferLLVM::CreateSliceFromPath(const llvm::Twine &Path, uint64_t Size,
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uint64_t Offset, bool Private) {
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// If the file resides non-locally, pass the volatile flag so that we don't
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// mmap it.
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if (!Private)
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Private = !llvm::sys::fs::is_local(Path);
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auto Buffer = llvm::MemoryBuffer::getFileSlice(Path, Size, Offset, Private);
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if (!Buffer)
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return nullptr;
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return std::shared_ptr<DataBufferLLVM>(
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new DataBufferLLVM(std::move(*Buffer)));
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}
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std::shared_ptr<DataBufferLLVM>
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DataBufferLLVM::CreateFromPath(const llvm::Twine &Path, bool NullTerminate, bool Private) {
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// If the file resides non-locally, pass the volatile flag so that we don't
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// mmap it.
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if (!Private)
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Private = !llvm::sys::fs::is_local(Path);
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auto Buffer = llvm::MemoryBuffer::getFile(Path, -1, NullTerminate, Private);
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if (!Buffer)
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return nullptr;
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return std::shared_ptr<DataBufferLLVM>(
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new DataBufferLLVM(std::move(*Buffer)));
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}
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uint8_t *DataBufferLLVM::GetBytes() {
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return const_cast<uint8_t *>(GetBuffer());
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}
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const uint8_t *DataBufferLLVM::GetBytes() const { return GetBuffer(); }
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lldb::offset_t DataBufferLLVM::GetByteSize() const {
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return Buffer->getBufferSize();
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}
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const uint8_t *DataBufferLLVM::GetBuffer() const {
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return reinterpret_cast<const uint8_t *>(Buffer->getBufferStart());
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}
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