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//===--- 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 "clang/Lex/ModuleLoader.h"
#include "llvm/Bitcode/BitstreamReader.h"
#include "llvm/Support/raw_ostream.h"
#include <utility>
using namespace clang;
PCHContainerWriter::~PCHContainerWriter() {}
PCHContainerReader::~PCHContainerReader() {}
namespace {
/// \brief A PCHContainerGenerator that writes out the PCH to a flat file.
class RawPCHContainerGenerator : public ASTConsumer {
std::shared_ptr<PCHBuffer> Buffer;
std::unique_ptr<raw_pwrite_stream> OS;
public:
RawPCHContainerGenerator(std::unique_ptr<llvm::raw_pwrite_stream> OS,
std::shared_ptr<PCHBuffer> Buffer)
: Buffer(std::move(Buffer)), OS(std::move(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, std::unique_ptr<llvm::raw_pwrite_stream> OS,
std::shared_ptr<PCHBuffer> Buffer) const {
return llvm::make_unique<RawPCHContainerGenerator>(std::move(OS), Buffer);
}
StringRef
RawPCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const {
return Buffer.getBuffer();
}
PCHContainerOperations::PCHContainerOperations() {
registerWriter(llvm::make_unique<RawPCHContainerWriter>());
registerReader(llvm::make_unique<RawPCHContainerReader>());
}
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