15 #ifndef LLVM_CLANG_BASIC_FILEMANAGER_H
16 #define LLVM_CLANG_BASIC_FILEMANAGER_H
20 #include "llvm/ADT/DenseMap.h"
21 #include "llvm/ADT/IntrusiveRefCntPtr.h"
22 #include "llvm/ADT/SmallVector.h"
23 #include "llvm/ADT/StringMap.h"
24 #include "llvm/ADT/StringRef.h"
25 #include "llvm/Support/Allocator.h"
26 #include "llvm/Support/ErrorOr.h"
27 #include "llvm/Support/FileSystem.h"
41 class FileSystemStatCache;
63 std::string RealPathName;
68 llvm::sys::fs::UniqueID UniqueID;
74 mutable std::unique_ptr<vfs::File> File;
88 unsigned getUID()
const {
return UID; }
89 const llvm::sys::fs::UniqueID &
getUniqueID()
const {
return UniqueID; }
121 std::map<llvm::sys::fs::UniqueID, DirectoryEntry> UniqueRealDirs;
124 std::map<llvm::sys::fs::UniqueID, FileEntry> UniqueRealFiles;
142 llvm::StringMap<DirectoryEntry*, llvm::BumpPtrAllocator> SeenDirEntries;
148 llvm::StringMap<FileEntry*, llvm::BumpPtrAllocator> SeenFileEntries;
151 llvm::DenseMap<const DirectoryEntry *, llvm::StringRef> CanonicalDirNames;
154 llvm::BumpPtrAllocator CanonicalNameStorage;
158 unsigned NextFileUID;
161 unsigned NumDirLookups, NumFileLookups;
162 unsigned NumDirCacheMisses, NumFileCacheMisses;
165 std::unique_ptr<FileSystemStatCache> StatCache;
167 bool getStatValue(StringRef Path,
FileData &Data,
bool isFile,
168 std::unique_ptr<vfs::File> *F);
172 void addAncestorsAsVirtualDirs(StringRef Path);
190 void addStatCache(std::unique_ptr<FileSystemStatCache> statCache,
191 bool AtBeginning =
false);
207 bool CacheFailure =
true);
219 bool CacheFailure =
true);
234 time_t ModificationTime);
238 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
240 bool ShouldCloseOpenFile =
true);
241 llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>>
275 time_t ModificationTime);
289 #endif // LLVM_CLANG_BASIC_FILEMANAGER_H
Implements support for file system lookup, file system caching, and directory search management...
FileManager(const FileSystemOptions &FileSystemOpts, IntrusiveRefCntPtr< vfs::FileSystem > FS=nullptr)
bool makeAbsolutePath(SmallVectorImpl< char > &Path) const
Makes Path absolute taking into account FileSystemOptions and the working directory option...
bool operator<(const FileEntry &RHS) const
Abstract interface for introducing a FileManager cache for 'stat' system calls, which is used by prec...
IntrusiveRefCntPtr< vfs::FileSystem > getVirtualFileSystem() const
StringRef getName() const
The result of a status operation.
const FileEntry * getFile(StringRef Filename, bool OpenFile=false, bool CacheFailure=true)
Lookup, cache, and verify the specified file (real or virtual).
const DirectoryEntry * getDirectory(StringRef DirName, bool CacheFailure=true)
Lookup, cache, and verify the specified directory (real or virtual).
const llvm::sys::fs::UniqueID & getUniqueID() const
FileEntry & operator=(const FileEntry &)=delete
The result type of a method or function.
bool isNamedPipe() const
Check whether the file is a named pipe (and thus can't be opened by the native FileManager methods)...
void addStatCache(std::unique_ptr< FileSystemStatCache > statCache, bool AtBeginning=false)
Installs the provided FileSystemStatCache object within the FileManager.
FileSystemOptions & getFileSystemOpts()
Returns the current file system options.
Cached information about one file (either on disk or in the virtual file system). ...
void clearStatCaches()
Removes all FileSystemStatCache objects from the manager.
const FileEntry * getVirtualFile(StringRef Filename, off_t Size, time_t ModificationTime)
Retrieve a file entry for a "virtual" file that acts as if there were a file with the given name on d...
StringRef tryGetRealPathName() const
StringRef getCanonicalName(const DirectoryEntry *Dir)
Retrieve the canonical name for a given directory.
void removeStatCache(FileSystemStatCache *statCache)
Removes the specified FileSystemStatCache object from the manager.
llvm::ErrorOr< std::unique_ptr< llvm::MemoryBuffer > > getBufferForFile(const FileEntry *Entry, bool isVolatile=false, bool ShouldCloseOpenFile=true)
Open the specified file as a MemoryBuffer, returning a new MemoryBuffer if successful, otherwise returning null.
StringRef getName() const
Defines the virtual file system interface vfs::FileSystem.
time_t getModificationTime() const
Defines the clang::FileSystemOptions interface.
Cached information about one directory (either on disk or in the virtual file system).
Keeps track of options that affect how file operations are performed.
bool getNoncachedStatValue(StringRef Path, vfs::Status &Result)
Get the 'stat' information for the given Path.
static void modifyFileEntry(FileEntry *File, off_t Size, time_t ModificationTime)
Modifies the size and modification time of a previously created FileEntry.
void invalidateCache(const FileEntry *Entry)
Remove the real file Entry from the cache.
const FileSystemOptions & getFileSystemOpts() const
const DirectoryEntry * getDir() const
Return the directory the file lives in.
bool FixupRelativePath(SmallVectorImpl< char > &path) const
If path is not absolute and FileSystemOptions set the working directory, the path is modified to be r...
void GetUniqueIDMapping(SmallVectorImpl< const FileEntry * > &UIDToFiles) const
Produce an array mapping from the unique IDs assigned to each file to the corresponding FileEntry poi...