FileOffset.h revision 651f13cea278ec967336033dd032faef0e9fc2ec 
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    return std::tie(LHS.FID, LHS.Offs) < std::tie(RHS.FID, RHS.Offs);
45  }
46  friend bool operator>(FileOffset LHS, FileOffset RHS) {
47    return RHS < LHS;
48  }
49  friend bool operator>=(FileOffset LHS, FileOffset RHS) {
50    return !(LHS < RHS);
51  }
52  friend bool operator<=(FileOffset LHS, FileOffset RHS) {
53    return !(RHS < LHS);
54  }
55};
56
57}
58
59} // end namespace clang
60
61#endif
62