| //===--- Frontend/PCHContainerOperations.cpp - PCH Containers ---*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines PCHContainerOperations and RawPCHContainerOperation. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "clang/Frontend/PCHContainerOperations.h" |
| #include "clang/AST/ASTConsumer.h" |
| #include "llvm/Bitcode/BitstreamReader.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "clang/Lex/ModuleLoader.h" |
| |
| using namespace clang; |
| |
| namespace { |
| |
| /// \brief A PCHContainerGenerator that writes out the PCH to a flat file. |
| class RawPCHContainerGenerator : public ASTConsumer { |
| std::shared_ptr<PCHBuffer> Buffer; |
| raw_pwrite_stream *OS; |
| |
| public: |
| RawPCHContainerGenerator(llvm::raw_pwrite_stream *OS, |
| std::shared_ptr<PCHBuffer> Buffer) |
| : Buffer(Buffer), OS(OS) {} |
| |
| ~RawPCHContainerGenerator() override = default; |
| |
| void HandleTranslationUnit(ASTContext &Ctx) override { |
| if (Buffer->IsComplete) { |
| // Make sure it hits disk now. |
| *OS << Buffer->Data; |
| OS->flush(); |
| } |
| // Free the space of the temporary buffer. |
| llvm::SmallVector<char, 0> Empty; |
| Buffer->Data = std::move(Empty); |
| } |
| }; |
| |
| } // anonymous namespace |
| |
| std::unique_ptr<ASTConsumer> RawPCHContainerWriter::CreatePCHContainerGenerator( |
| CompilerInstance &CI, const std::string &MainFileName, |
| const std::string &OutputFileName, llvm::raw_pwrite_stream *OS, |
| std::shared_ptr<PCHBuffer> Buffer) const { |
| return llvm::make_unique<RawPCHContainerGenerator>(OS, Buffer); |
| } |
| |
| void RawPCHContainerReader::ExtractPCH( |
| llvm::MemoryBufferRef Buffer, llvm::BitstreamReader &StreamFile) const { |
| StreamFile.init((const unsigned char *)Buffer.getBufferStart(), |
| (const unsigned char *)Buffer.getBufferEnd()); |
| } |
| |
| PCHContainerOperations::PCHContainerOperations() { |
| registerWriter(llvm::make_unique<RawPCHContainerWriter>()); |
| registerReader(llvm::make_unique<RawPCHContainerReader>()); |
| } |