clang 19.0.0git
PCHContainerOperations.cpp
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1//=== Serialization/PCHContainerOperations.cpp - PCH Containers -*- C++ -*-===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8//
9// This file defines PCHContainerOperations and RawPCHContainerOperation.
10//
11//===----------------------------------------------------------------------===//
12
16#include "llvm/Bitstream/BitstreamReader.h"
17#include "llvm/Support/raw_ostream.h"
18#include <utility>
19
20using namespace clang;
21
24
25namespace {
26
27/// A PCHContainerGenerator that writes out the PCH to a flat file.
28class RawPCHContainerGenerator : public ASTConsumer {
29 std::shared_ptr<PCHBuffer> Buffer;
30 std::unique_ptr<raw_pwrite_stream> OS;
31
32public:
33 RawPCHContainerGenerator(std::unique_ptr<llvm::raw_pwrite_stream> OS,
34 std::shared_ptr<PCHBuffer> Buffer)
35 : Buffer(std::move(Buffer)), OS(std::move(OS)) {}
36
37 ~RawPCHContainerGenerator() override = default;
38
39 void HandleTranslationUnit(ASTContext &Ctx) override {
40 if (Buffer->IsComplete) {
41 // Make sure it hits disk now.
42 *OS << Buffer->Data;
43 OS->flush();
44 }
45 // Free the space of the temporary buffer.
47 Buffer->Data = std::move(Empty);
48 }
49};
50
51} // anonymous namespace
52
53std::unique_ptr<ASTConsumer> RawPCHContainerWriter::CreatePCHContainerGenerator(
54 CompilerInstance &CI, const std::string &MainFileName,
55 const std::string &OutputFileName, std::unique_ptr<llvm::raw_pwrite_stream> OS,
56 std::shared_ptr<PCHBuffer> Buffer) const {
57 return std::make_unique<RawPCHContainerGenerator>(std::move(OS), Buffer);
58}
59
60ArrayRef<llvm::StringRef> RawPCHContainerReader::getFormats() const {
61 static StringRef Raw("raw");
62 return ArrayRef(Raw);
63}
64
65StringRef
66RawPCHContainerReader::ExtractPCH(llvm::MemoryBufferRef Buffer) const {
67 return Buffer.getBuffer();
68}
69
71 registerWriter(std::make_unique<RawPCHContainerWriter>());
72 registerReader(std::make_unique<RawPCHContainerReader>());
73}
ASTConsumer - This is an abstract interface that should be implemented by clients that read ASTs.
Definition: ASTConsumer.h:33
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:182
CompilerInstance - Helper class for managing a single instance of the Clang compiler.
void registerReader(std::unique_ptr< PCHContainerReader > Reader)
PCHContainerOperations()
Automatically registers a RawPCHContainerWriter and RawPCHContainerReader.
void registerWriter(std::unique_ptr< PCHContainerWriter > Writer)
The JSON file list parser is used to communicate input to InstallAPI.
Definition: Format.h:5378