forked from OSchip/llvm-project
74 lines
2.7 KiB
C++
74 lines
2.7 KiB
C++
//===--- Frontend/PCHContainerOperations.cpp - PCH Containers ---*- 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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//
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// This file defines PCHContainerOperations and RawPCHContainerOperation.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Frontend/PCHContainerOperations.h"
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#include "clang/AST/ASTConsumer.h"
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#include "llvm/Bitcode/BitstreamReader.h"
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#include "llvm/Support/raw_ostream.h"
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#include "clang/Lex/ModuleLoader.h"
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using namespace clang;
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namespace {
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/// \brief A PCHContainerGenerator that writes out the PCH to a flat file.
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class RawPCHContainerGenerator : public ASTConsumer {
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std::shared_ptr<PCHBuffer> Buffer;
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raw_pwrite_stream *OS;
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public:
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RawPCHContainerGenerator(DiagnosticsEngine &Diags,
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const HeaderSearchOptions &HSO,
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const PreprocessorOptions &PPO,
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const TargetOptions &TO, const LangOptions &LO,
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const std::string &MainFileName,
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const std::string &OutputFileName,
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llvm::raw_pwrite_stream *OS,
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std::shared_ptr<PCHBuffer> Buffer)
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: Buffer(Buffer), OS(OS) {}
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virtual ~RawPCHContainerGenerator() {}
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void HandleTranslationUnit(ASTContext &Ctx) override {
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if (Buffer->IsComplete) {
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// Make sure it hits disk now.
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*OS << Buffer->Data;
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OS->flush();
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}
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// Free the space of the temporary buffer.
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llvm::SmallVector<char, 0> Empty;
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Buffer->Data = std::move(Empty);
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}
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};
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}
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std::unique_ptr<ASTConsumer> RawPCHContainerWriter::CreatePCHContainerGenerator(
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DiagnosticsEngine &Diags, const HeaderSearchOptions &HSO,
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const PreprocessorOptions &PPO, const TargetOptions &TO,
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const LangOptions &LO, const std::string &MainFileName,
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const std::string &OutputFileName, llvm::raw_pwrite_stream *OS,
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std::shared_ptr<PCHBuffer> Buffer) const {
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return llvm::make_unique<RawPCHContainerGenerator>(
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Diags, HSO, PPO, TO, LO, MainFileName, OutputFileName, OS, Buffer);
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}
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void RawPCHContainerReader::ExtractPCH(
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llvm::MemoryBufferRef Buffer, llvm::BitstreamReader &StreamFile) const {
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StreamFile.init((const unsigned char *)Buffer.getBufferStart(),
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(const unsigned char *)Buffer.getBufferEnd());
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}
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PCHContainerOperations::PCHContainerOperations() {
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registerWriter(llvm::make_unique<RawPCHContainerWriter>());
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registerReader(llvm::make_unique<RawPCHContainerReader>());
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}
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