1 //===-- FileRemapper.h - File Remapping Helper ------------------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef LLVM_CLANG_ARCMIGRATE_FILEREMAPPER_H 11 #define LLVM_CLANG_ARCMIGRATE_FILEREMAPPER_H 12 13 #include "clang/Basic/LLVM.h" 14 #include "llvm/ADT/DenseMap.h" 15 #include "llvm/ADT/PointerUnion.h" 16 #include "llvm/ADT/StringRef.h" 17 #include <memory> 18 19 namespace llvm { 20 class MemoryBuffer; 21 } 22 23 namespace clang { 24 class FileManager; 25 class FileEntry; 26 class DiagnosticsEngine; 27 class PreprocessorOptions; 28 29 namespace arcmt { 30 31 class FileRemapper { 32 // FIXME: Reuse the same FileManager for multiple ASTContexts. 33 std::unique_ptr<FileManager> FileMgr; 34 35 typedef llvm::PointerUnion<const FileEntry *, llvm::MemoryBuffer *> Target; 36 typedef llvm::DenseMap<const FileEntry *, Target> MappingsTy; 37 MappingsTy FromToMappings; 38 39 llvm::DenseMap<const FileEntry *, const FileEntry *> ToFromMappings; 40 41 public: 42 FileRemapper(); 43 ~FileRemapper(); 44 45 bool initFromDisk(StringRef outputDir, DiagnosticsEngine &Diag, 46 bool ignoreIfFilesChanged); 47 bool initFromFile(StringRef filePath, DiagnosticsEngine &Diag, 48 bool ignoreIfFilesChanged); 49 bool flushToDisk(StringRef outputDir, DiagnosticsEngine &Diag); 50 bool flushToFile(StringRef outputPath, DiagnosticsEngine &Diag); 51 52 bool overwriteOriginal(DiagnosticsEngine &Diag, 53 StringRef outputDir = StringRef()); 54 55 void remap(StringRef filePath, llvm::MemoryBuffer *memBuf); 56 57 void applyMappings(PreprocessorOptions &PPOpts) const; 58 59 void clear(StringRef outputDir = StringRef()); 60 61 private: 62 void remap(const FileEntry *file, llvm::MemoryBuffer *memBuf); 63 void remap(const FileEntry *file, const FileEntry *newfile); 64 65 const FileEntry *getOriginalFile(StringRef filePath); 66 void resetTarget(Target &targ); 67 68 bool report(const Twine &err, DiagnosticsEngine &Diag); 69 70 std::string getRemapInfoFile(StringRef outputDir); 71 }; 72 73 } // end namespace arcmt 74 75 } // end namespace clang 76 77 #endif 78