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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 "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 PCHContainerGenerator : public ASTConsumer {
std::shared_ptr<PCHBuffer> Buffer;
raw_pwrite_stream *OS;
public:
PCHContainerGenerator(DiagnosticsEngine &Diags,
const HeaderSearchOptions &HSO,
const PreprocessorOptions &PPO, const TargetOptions &TO,
const LangOptions &LO, const std::string &MainFileName,
const std::string &OutputFileName,
llvm::raw_pwrite_stream *OS,
std::shared_ptr<PCHBuffer> Buffer)
: Buffer(Buffer), OS(OS) {}
virtual ~PCHContainerGenerator() {}
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);
}
};
}
std::unique_ptr<ASTConsumer>
RawPCHContainerOperations::CreatePCHContainerGenerator(
DiagnosticsEngine &Diags, const HeaderSearchOptions &HSO,
const PreprocessorOptions &PPO, const TargetOptions &TO,
const LangOptions &LO, const std::string &MainFileName,
const std::string &OutputFileName, llvm::raw_pwrite_stream *OS,
std::shared_ptr<PCHBuffer> Buffer) const {
return llvm::make_unique<PCHContainerGenerator>(
Diags, HSO, PPO, TO, LO, MainFileName, OutputFileName, OS, Buffer);
}
void RawPCHContainerOperations::ExtractPCH(
llvm::MemoryBufferRef Buffer, llvm::BitstreamReader &StreamFile) const {
StreamFile.init((const unsigned char *)Buffer.getBufferStart(),
(const unsigned char *)Buffer.getBufferEnd());
}
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