1 //===- DIADataStream.cpp - DIA implementation of IPDBDataStream -*- 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/DIADataStream.h"
10 #include "llvm/DebugInfo/PDB/DIA/DIAUtils.h"
11
12 using namespace llvm;
13 using namespace llvm::pdb;
14
DIADataStream(CComPtr<IDiaEnumDebugStreamData> DiaStreamData)15 DIADataStream::DIADataStream(CComPtr<IDiaEnumDebugStreamData> DiaStreamData)
16 : StreamData(DiaStreamData) {}
17
getRecordCount() const18 uint32_t DIADataStream::getRecordCount() const {
19 LONG Count = 0;
20 return (S_OK == StreamData->get_Count(&Count)) ? Count : 0;
21 }
22
getName() const23 std::string DIADataStream::getName() const {
24 return invokeBstrMethod(*StreamData, &IDiaEnumDebugStreamData::get_name);
25 }
26
27 std::optional<DIADataStream::RecordType>
getItemAtIndex(uint32_t Index) const28 DIADataStream::getItemAtIndex(uint32_t Index) const {
29 RecordType Record;
30 DWORD RecordSize = 0;
31 StreamData->Item(Index, 0, &RecordSize, nullptr);
32 if (RecordSize == 0)
33 return std::nullopt;
34
35 Record.resize(RecordSize);
36 if (S_OK != StreamData->Item(Index, RecordSize, &RecordSize, &Record[0]))
37 return std::nullopt;
38 return Record;
39 }
40
getNext(RecordType & Record)41 bool DIADataStream::getNext(RecordType &Record) {
42 Record.clear();
43 DWORD RecordSize = 0;
44 ULONG CountFetched = 0;
45 StreamData->Next(1, 0, &RecordSize, nullptr, &CountFetched);
46 if (RecordSize == 0)
47 return false;
48
49 Record.resize(RecordSize);
50 if (S_OK ==
51 StreamData->Next(1, RecordSize, &RecordSize, &Record[0], &CountFetched))
52 return false;
53 return true;
54 }
55
reset()56 void DIADataStream::reset() { StreamData->Reset(); }
57