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/ADT/ArrayRef.h"
12 #include "llvm/Support/ConvertUTF.h"
13
14 using namespace llvm;
15 using namespace llvm::pdb;
16
DIADataStream(CComPtr<IDiaEnumDebugStreamData> DiaStreamData)17 DIADataStream::DIADataStream(CComPtr<IDiaEnumDebugStreamData> DiaStreamData)
18 : StreamData(DiaStreamData) {}
19
getRecordCount() const20 uint32_t DIADataStream::getRecordCount() const {
21 LONG Count = 0;
22 return (S_OK == StreamData->get_Count(&Count)) ? Count : 0;
23 }
24
getName() const25 std::string DIADataStream::getName() const {
26 CComBSTR Name16;
27 if (S_OK != StreamData->get_name(&Name16))
28 return std::string();
29
30 std::string Name8;
31 llvm::ArrayRef<char> Name16Bytes(reinterpret_cast<char *>(Name16.m_str),
32 Name16.ByteLength());
33 if (!llvm::convertUTF16ToUTF8String(Name16Bytes, Name8))
34 return std::string();
35 return Name8;
36 }
37
38 llvm::Optional<DIADataStream::RecordType>
getItemAtIndex(uint32_t Index) const39 DIADataStream::getItemAtIndex(uint32_t Index) const {
40 RecordType Record;
41 DWORD RecordSize = 0;
42 StreamData->Item(Index, 0, &RecordSize, nullptr);
43 if (RecordSize == 0)
44 return llvm::Optional<RecordType>();
45
46 Record.resize(RecordSize);
47 if (S_OK != StreamData->Item(Index, RecordSize, &RecordSize, &Record[0]))
48 return llvm::Optional<RecordType>();
49 return Record;
50 }
51
getNext(RecordType & Record)52 bool DIADataStream::getNext(RecordType &Record) {
53 Record.clear();
54 DWORD RecordSize = 0;
55 ULONG CountFetched = 0;
56 StreamData->Next(1, 0, &RecordSize, nullptr, &CountFetched);
57 if (RecordSize == 0)
58 return false;
59
60 Record.resize(RecordSize);
61 if (S_OK ==
62 StreamData->Next(1, RecordSize, &RecordSize, &Record[0], &CountFetched))
63 return false;
64 return true;
65 }
66
reset()67 void DIADataStream::reset() { StreamData->Reset(); }
68
clone() const69 DIADataStream *DIADataStream::clone() const {
70 CComPtr<IDiaEnumDebugStreamData> EnumeratorClone;
71 if (S_OK != StreamData->Clone(&EnumeratorClone))
72 return nullptr;
73
74 return new DIADataStream(EnumeratorClone);
75 }
76