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//===--- Frontend/PCHContainerOperations.h - PCH Containers -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_PCH_CONTAINER_OPERATIONS_H
#define LLVM_CLANG_PCH_CONTAINER_OPERATIONS_H
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/MemoryBuffer.h"
#include <memory>
namespace llvm {
class raw_pwrite_stream;
class BitstreamReader;
}
namespace clang {
class ASTConsumer;
class CodeGenOptions;
class DiagnosticsEngine;
class HeaderSearchOptions;
class LangOptions;
class PreprocessorOptions;
class TargetOptions;
struct PCHBuffer {
bool IsComplete;
llvm::SmallVector<char, 0> Data;
};
/// \brief This abstract interface provides operations for creating
/// and unwrapping containers for serialized ASTs (precompiled headers
/// and clang modules).
class PCHContainerOperations {
public:
virtual ~PCHContainerOperations();
/// \brief Return an ASTConsumer that can be chained with a
/// PCHGenerator that produces a wrapper file format containing a
/// serialized AST bitstream.
virtual std::unique_ptr<ASTConsumer> 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 = 0;
/// \brief Initialize an llvm::BitstreamReader with the serialized AST inside
/// the PCH container Buffer.
virtual void ExtractPCH(llvm::MemoryBufferRef Buffer,
llvm::BitstreamReader &StreamFile) const = 0;
};
/// \brief Implements a raw pass-through PCH container.
class RawPCHContainerOperations : public PCHContainerOperations {
/// \brief Return an ASTConsumer that can be chained with a
/// PCHGenerator that writes the module to a flat file.
std::unique_ptr<ASTConsumer> 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 override;
/// \brief Initialize an llvm::BitstreamReader with Buffer.
void ExtractPCH(llvm::MemoryBufferRef Buffer,
llvm::BitstreamReader &StreamFile) const override;
};
}
#endif
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