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  1. //===- DIAUtils.h - Utility functions for working with DIA ------*- 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_DEBUGINFO_PDB_DIA_DIAUTILS_H
  10. #define LLVM_DEBUGINFO_PDB_DIA_DIAUTILS_H
  11.  
  12. #include "llvm/ADT/ArrayRef.h"
  13. #include "llvm/Support/ConvertUTF.h"
  14.  
  15. template <typename Obj>
  16. std::string invokeBstrMethod(Obj &Object,
  17.                              HRESULT (__stdcall Obj::*Func)(BSTR *)) {
  18.   CComBSTR Str16;
  19.   HRESULT Result = (Object.*Func)(&Str16);
  20.   if (S_OK != Result)
  21.     return std::string();
  22.  
  23.   std::string Str8;
  24.   llvm::ArrayRef<char> StrBytes(reinterpret_cast<char *>(Str16.m_str),
  25.                                 Str16.ByteLength());
  26.   llvm::convertUTF16ToUTF8String(StrBytes, Str8);
  27.   return Str8;
  28. }
  29.  
  30. #endif // LLVM_DEBUGINFO_PDB_DIA_DIAUTILS_H
  31.