Revert "Revert "[PDB] Extend IPDBSession's interface to retrieve frame data""

This reverts commit 466ce67d6ec444962e5cc0136243c16a453190c0.

llvm-svn: 345010

1 files changed, 43 insertions, 0 deletions

diff --git a/llvm/lib/DebugInfo/PDB/DIA/DIAEnumFrameData.cpp b/llvm/lib/DebugInfo/PDB/DIA/DIAEnumFrameData.cpp
new file mode 100644
index 00000000000..77514483e04
--- /dev/null
+++ b/llvm/lib/DebugInfo/PDB/DIA/DIAEnumFrameData.cpp
@@ -0,0 +1,43 @@
+//==- DIAEnumFrameData.cpp ---------------------------------------*- C++ -*-==//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/DebugInfo/PDB/DIA/DIAEnumFrameData.h"
+#include "llvm/DebugInfo/PDB/DIA/DIAFrameData.h"
+#include "llvm/DebugInfo/PDB/DIA/DIASession.h"
+
+using namespace llvm::pdb;
+
+DIAEnumFrameData::DIAEnumFrameData(const DIASession &PDBSession,
+                                   CComPtr<IDiaEnumFrameData> DiaEnumerator)
+    : Session(PDBSession), Enumerator(DiaEnumerator) {}
+
+uint32_t DIAEnumFrameData::getChildCount() const {
+  LONG Count = 0;
+  return (S_OK == Enumerator->get_Count(&Count)) ? Count : 0;
+}
+
+std::unique_ptr<IPDBFrameData>
+DIAEnumFrameData::getChildAtIndex(uint32_t Index) const {
+  CComPtr<IDiaFrameData> Item;
+  if (S_OK != Enumerator->Item(Index, &Item))
+    return nullptr;
+
+  return std::unique_ptr<IPDBFrameData>(new DIAFrameData(Session, Item));
+}
+
+std::unique_ptr<IPDBFrameData> DIAEnumFrameData::getNext() {
+  CComPtr<IDiaFrameData> Item;
+  ULONG NumFetched = 0;
+  if (S_OK != Enumerator->Next(1, &Item, &NumFetched))
+    return nullptr;
+
+  return std::unique_ptr<IPDBFrameData>(new DIAFrameData(Session, Item));
+}
+
+void DIAEnumFrameData::reset() { Enumerator->Reset(); }