lib/DebugInfo/PDB/DIA/DIAEnumSymbols.cpp

   1 //==- DIAEnumSymbols.cpp - DIA Symbol Enumerator impl ------------*- 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 #include "llvm/DebugInfo/PDB/DIA/DIAEnumSymbols.h"
  10 #include "llvm/DebugInfo/PDB/DIA/DIARawSymbol.h"
  11 #include "llvm/DebugInfo/PDB/DIA/DIASession.h"
  12 #include "llvm/DebugInfo/PDB/PDBSymbol.h"
  13
  14 using namespace llvm;
  15 using namespace llvm::pdb;
  16
  17 DIAEnumSymbols::DIAEnumSymbols(const DIASession &PDBSession,
  18                                CComPtr<IDiaEnumSymbols> DiaEnumerator)
  19     : Session(PDBSession), Enumerator(DiaEnumerator) {}
  20
  21 uint32_t DIAEnumSymbols::getChildCount() const {
  22   LONG Count = 0;
  23   return (S_OK == Enumerator->get_Count(&Count)) ? Count : 0;
  24 }
  25
  26 std::unique_ptr<PDBSymbol>
  27 DIAEnumSymbols::getChildAtIndex(uint32_t Index) const {
  28   CComPtr<IDiaSymbol> Item;
  29   if (S_OK != Enumerator->Item(Index, &Item))
  30     return nullptr;
  31
  32   std::unique_ptr<DIARawSymbol> RawSymbol(new DIARawSymbol(Session, Item));
  33   return std::unique_ptr<PDBSymbol>(PDBSymbol::create(Session, std::move(RawSymbol)));
  34 }
  35
  36 std::unique_ptr<PDBSymbol> DIAEnumSymbols::getNext() {
  37   CComPtr<IDiaSymbol> Item;
  38   ULONG NumFetched = 0;
  39   if (S_OK != Enumerator->Next(1, &Item, &NumFetched))
  40     return nullptr;
  41
  42   std::unique_ptr<DIARawSymbol> RawSymbol(new DIARawSymbol(Session, Item));
  43   return std::unique_ptr<PDBSymbol>(
  44       PDBSymbol::create(Session, std::move(RawSymbol)));
  45 }
  46
  47 void DIAEnumSymbols::reset() { Enumerator->Reset(); }