FileOffset.h revision 30660a898545416f0fea2d717f16f75640001e38 
1//===----- FileOffset.h - Offset in a file ----------------------*- 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_EDIT_FILEOFFSET_H
11#define LLVM_CLANG_EDIT_FILEOFFSET_H
12
13#include "clang/Basic/SourceLocation.h"
14
15namespace clang {
16
17namespace edit {
18
19class FileOffset {
20  FileID FID;
21  unsigned Offs;
22public:
23  FileOffset() : Offs(0) { }
24  FileOffset(FileID fid, unsigned offs) : FID(fid), Offs(offs) { }
25
26  bool isInvalid() const { return FID.isInvalid(); }
27
28  FileID getFID() const { return FID; }
29  unsigned getOffset() const { return Offs; }
30
31  FileOffset getWithOffset(unsigned offset) const {
32    FileOffset NewOffs = *this;
33    NewOffs.Offs += offset;
34    return NewOffs;
35  }
36
37  friend bool operator==(FileOffset LHS, FileOffset RHS) {
38    return LHS.FID == RHS.FID && LHS.Offs == RHS.Offs;
39  }
40  friend bool operator!=(FileOffset LHS, FileOffset RHS) {
41    return !(LHS == RHS);
42  }
43  friend bool operator<(FileOffset LHS, FileOffset RHS) {
44    if (LHS.FID != RHS.FID)
45      return LHS.FID < RHS.FID;
46    return LHS.Offs < RHS.Offs;
47  }
48  friend bool operator>(FileOffset LHS, FileOffset RHS) {
49    if (LHS.FID != RHS.FID)
50      return LHS.FID > RHS.FID;
51    return LHS.Offs > RHS.Offs;
52  }
53  friend bool operator>=(FileOffset LHS, FileOffset RHS) {
54    return LHS > RHS || LHS == RHS;
55  }
56  friend bool operator<=(FileOffset LHS, FileOffset RHS) {
57    return LHS < RHS || LHS == RHS;
58  }
59};
60
61}
62
63} // end namespace clang
64
65#endif
66