1 //===- DIADataStream.cpp - DIA implementation of IPDBDataStream -*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "llvm/DebugInfo/PDB/DIA/DIADataStream.h"
11 #include "llvm/Support/ConvertUTF.h"
12
13 using namespace llvm;
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 CComBSTR Name16;
25 if (S_OK != StreamData->get_name(&Name16))
26 return std::string();
27
28 std::string Name8;
29 llvm::ArrayRef<char> Name16Bytes(reinterpret_cast<char *>(Name16.m_str),
30 Name16.ByteLength());
31 if (!llvm::convertUTF16ToUTF8String(Name16Bytes, Name8))
32 return std::string();
33 return Name8;
34 }
35
36 llvm::Optional<DIADataStream::RecordType>
getItemAtIndex(uint32_t Index) const37 DIADataStream::getItemAtIndex(uint32_t Index) const {
38 RecordType Record;
39 DWORD RecordSize = 0;
40 StreamData->Item(Index, 0, &RecordSize, nullptr);
41 if (RecordSize == 0)
42 return llvm::Optional<RecordType>();
43
44 Record.resize(RecordSize);
45 if (S_OK != StreamData->Item(Index, RecordSize, &RecordSize, &Record[0]))
46 return llvm::Optional<RecordType>();
47 return Record;
48 }
49
getNext(RecordType & Record)50 bool DIADataStream::getNext(RecordType &Record) {
51 Record.clear();
52 DWORD RecordSize = 0;
53 ULONG CountFetched = 0;
54 StreamData->Next(1, 0, &RecordSize, nullptr, &CountFetched);
55 if (RecordSize == 0)
56 return false;
57
58 Record.resize(RecordSize);
59 if (S_OK ==
60 StreamData->Next(1, RecordSize, &RecordSize, &Record[0], &CountFetched))
61 return false;
62 return true;
63 }
64
reset()65 void DIADataStream::reset() { StreamData->Reset(); }
66
clone() const67 DIADataStream *DIADataStream::clone() const {
68 CComPtr<IDiaEnumDebugStreamData> EnumeratorClone;
69 if (S_OK != StreamData->Clone(&EnumeratorClone))
70 return nullptr;
71
72 return new DIADataStream(EnumeratorClone);
73 }
74