llvm/lib/DebugInfo/PDB/DIA/DIAEnumTables.cpp

   1 //===- DIAEnumTables.cpp - DIA Table 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/DIAEnumTables.h"
  10 #include "llvm/DebugInfo/PDB/DIA/DIATable.h"
  11
  12 using namespace llvm;
  13 using namespace llvm::pdb;
  14
  15 DIAEnumTables::DIAEnumTables(CComPtr<IDiaEnumTables> DiaEnumerator)
  16     : Enumerator(DiaEnumerator) {}
  17
  18 uint32_t DIAEnumTables::getChildCount() const {
  19   LONG Count = 0;
  20   return (S_OK == Enumerator->get_Count(&Count)) ? Count : 0;
  21 }
  22
  23 std::unique_ptr<IPDBTable>
  24 DIAEnumTables::getChildAtIndex(uint32_t Index) const {
  25   CComPtr<IDiaTable> Item;
  26   VARIANT Var;
  27   Var.vt = VT_UINT;
  28   Var.uintVal = Index;
  29   if (S_OK != Enumerator->Item(Var, &Item))
  30     return nullptr;
  31
  32   return std::unique_ptr<IPDBTable>(new DIATable(Item));
  33 }
  34
  35 std::unique_ptr<IPDBTable> DIAEnumTables::getNext() {
  36   CComPtr<IDiaTable> Item;
  37   ULONG CeltFetched = 0;
  38   if (S_OK != Enumerator->Next(1, &Item, &CeltFetched))
  39     return nullptr;
  40
  41   return std::unique_ptr<IPDBTable>(new DIATable(Item));
  42 }
  43
  44 void DIAEnumTables::reset() { Enumerator->Reset(); }