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94 lines
2.9 KiB
C++
94 lines
2.9 KiB
C++
/* Copyright 2017-2018 ccls Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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==============================================================================*/
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#pragma once
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#include "position.h"
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#include "serializer.h"
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#include "utils.h"
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#include <clang/Basic/FileManager.h>
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#include <mutex>
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#include <unordered_map>
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#include <vector>
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struct IndexFile;
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struct FileContents {
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FileContents() = default;
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FileContents(const std::string &path, const std::string &content);
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std::optional<int> ToOffset(Position p) const;
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std::optional<std::string> ContentsInRange(Range range) const;
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std::string path;
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std::string content;
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// {0, 1 + position of first newline, 1 + position of second newline, ...}
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std::vector<int> line_offsets_;
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};
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struct VFS {
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struct State {
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int64_t timestamp;
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bool loaded = false;
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};
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mutable std::unordered_map<std::string, State> state;
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mutable std::mutex mutex;
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State Get(const std::string &file);
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bool Stamp(const std::string &file, int64_t ts, int64_t offset);
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};
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namespace std {
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template <> struct hash<llvm::sys::fs::UniqueID> {
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std::size_t operator()(llvm::sys::fs::UniqueID ID) const {
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size_t ret = ID.getDevice();
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hash_combine(ret, ID.getFile());
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return ret;
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}
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};
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} // namespace std
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// FileConsumer is used by the indexer. When it encouters a file, it tries to
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// take ownership over it. If the indexer has ownership over a file, it will
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// produce an index, otherwise, it will emit nothing for that declarations
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// and references coming from that file.
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//
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// The indexer does this because header files do not have their own translation
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// units but we still want to index them.
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struct FileConsumer {
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FileConsumer(VFS *vfs, const std::string &parse_file);
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// Returns IndexFile for the file or nullptr. |is_first_ownership| is set
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// to true iff the function just took ownership over the file. Otherwise it
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// is set to false.
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//
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// note: file_contents is passed as a parameter instead of as a member
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// variable since it is large and we do not want to copy it.
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IndexFile *
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TryConsumeFile(const clang::FileEntry &file,
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std::unordered_map<std::string, FileContents> *file_contents);
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// Returns and passes ownership of all local state.
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std::vector<std::unique_ptr<IndexFile>> TakeLocalState();
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private:
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std::unordered_map<llvm::sys::fs::UniqueID, std::unique_ptr<IndexFile>>
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local_;
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VFS *vfs_;
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std::string parse_file_;
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};
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