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  1. //===- FileOffset.h - Offset in a file --------------------------*- C++ -*-===//
  2. //
  3. // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
  4. // See https://llvm.org/LICENSE.txt for license information.
  5. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
  6. //
  7. //===----------------------------------------------------------------------===//
  8.  
  9. #ifndef LLVM_CLANG_EDIT_FILEOFFSET_H
  10. #define LLVM_CLANG_EDIT_FILEOFFSET_H
  11.  
  12. #include "clang/Basic/SourceLocation.h"
  13. #include <tuple>
  14.  
  15. namespace clang {
  16. namespace edit {
  17.  
  18. class FileOffset {
  19.   FileID FID;
  20.   unsigned Offs = 0;
  21.  
  22. public:
  23.   FileOffset() = default;
  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.  
  41.   friend bool operator!=(FileOffset LHS, FileOffset RHS) {
  42.     return !(LHS == RHS);
  43.   }
  44.  
  45.   friend bool operator<(FileOffset LHS, FileOffset RHS) {
  46.     return std::tie(LHS.FID, LHS.Offs) < std::tie(RHS.FID, RHS.Offs);
  47.   }
  48.  
  49.   friend bool operator>(FileOffset LHS, FileOffset RHS) {
  50.     return RHS < LHS;
  51.   }
  52.  
  53.   friend bool operator>=(FileOffset LHS, FileOffset RHS) {
  54.     return !(LHS < RHS);
  55.   }
  56.  
  57.   friend bool operator<=(FileOffset LHS, FileOffset RHS) {
  58.     return !(RHS < LHS);
  59.   }
  60. };
  61.  
  62. } // namespace edit
  63. } // namespace clang
  64.  
  65. #endif // LLVM_CLANG_EDIT_FILEOFFSET_H
  66.