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[FreeBSD/releng/10.0.git] / contrib / llvm / tools / clang / include / clang / ARCMigrate / FileRemapper.h
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/OwningPtr.h"
16 #include "llvm/ADT/PointerUnion.h"
17 #include "llvm/ADT/StringRef.h"
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   OwningPtr<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   void remap(StringRef filePath, StringRef newPath);
57
58   void applyMappings(PreprocessorOptions &PPOpts) const;
59
60   void transferMappingsAndClear(PreprocessorOptions &PPOpts);
61
62   void clear(StringRef outputDir = StringRef());
63
64 private:
65   void remap(const FileEntry *file, llvm::MemoryBuffer *memBuf);
66   void remap(const FileEntry *file, const FileEntry *newfile);
67
68   const FileEntry *getOriginalFile(StringRef filePath);
69   void resetTarget(Target &targ);
70
71   bool report(const Twine &err, DiagnosticsEngine &Diag);
72
73   std::string getRemapInfoFile(StringRef outputDir);
74 };
75
76 } // end namespace arcmt
77
78 }  // end namespace clang
79
80 #endif