replica
/
hanchenye-llvm-project
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Safely get a data pointer for vectors that might be empty. 

llvm-svn: 109867
This commit is contained in:
Sebastian Redl 2010-07-30 17:03:48 +00:00
parent 7b70eb4bb1
commit 3df5a08b99
1 changed files with 15 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
clang/lib/Frontend/PCHWriter.cpp
View File

@ -40,6 +40,15 @@
#include <cstdio>
using namespace clang;
template <typename T, typename Allocator>
T *data(std::vector<T, Allocator> &v) {
return v.empty() ? 0 : &v.front();
}
template <typename T, typename Allocator>
const T *data(const std::vector<T, Allocator> &v) {
return v.empty() ? 0 : &v.front();
}
//===----------------------------------------------------------------------===//
// Type serialization
//===----------------------------------------------------------------------===//
@ -1218,7 +1227,7 @@ void PCHWriter::WriteSourceManagerBlock(SourceManager &SourceMgr,
Record.push_back(SLocEntryOffsets.size());
Record.push_back(SourceMgr.getNextOffset());
Stream.EmitRecordWithBlob(SLocOffsetsAbbrev, Record,
(const char *)&SLocEntryOffsets.front(),
(const char *)data(SLocEntryOffsets),
SLocEntryOffsets.size()*sizeof(SLocEntryOffsets[0]));
// Write the source location entry preloads array, telling the PCH
@ -1376,7 +1385,7 @@ void PCHWriter::WritePreprocessor(const Preprocessor &PP) {
Record.push_back(NumPreprocessingRecords);
Record.push_back(MacroDefinitionOffsets.size());
Stream.EmitRecordWithBlob(MacroDefOffsetAbbrev, Record,
(const char *)&MacroDefinitionOffsets.front(),
(const char *)data(MacroDefinitionOffsets),
MacroDefinitionOffsets.size() * sizeof(uint32_t));
}
}
@ -1523,7 +1532,7 @@ void PCHWriter::WriteTypeDeclOffsets() {
Record.push_back(pch::TYPE_OFFSET);
Record.push_back(TypeOffsets.size());
Stream.EmitRecordWithBlob(TypeOffsetAbbrev, Record,
(const char *)&TypeOffsets.front(),
(const char *)data(TypeOffsets),
TypeOffsets.size() * sizeof(TypeOffsets[0]));
// Write the declaration offsets array
@ -1536,7 +1545,7 @@ void PCHWriter::WriteTypeDeclOffsets() {
Record.push_back(pch::DECL_OFFSET);
Record.push_back(DeclOffsets.size());
Stream.EmitRecordWithBlob(DeclOffsetAbbrev, Record,
(const char *)&DeclOffsets.front(),
(const char *)data(DeclOffsets),
DeclOffsets.size() * sizeof(DeclOffsets[0]));
}
@ -1738,7 +1747,7 @@ void PCHWriter::WriteMethodPool(Sema &SemaRef) {
Record.push_back(pch::SELECTOR_OFFSETS);
Record.push_back(SelectorOffsets.size());
Stream.EmitRecordWithBlob(SelectorOffsetAbbrev, Record,
(const char *)&SelectorOffsets.front(),
(const char *)data(SelectorOffsets),
SelectorOffsets.size() * 4);
}
}
@ -1939,7 +1948,7 @@ void PCHWriter::WriteIdentifierTable(Preprocessor &PP) {
Record.push_back(pch::IDENTIFIER_OFFSET);
Record.push_back(IdentifierOffsets.size());
Stream.EmitRecordWithBlob(IdentifierOffsetAbbrev, Record,
(const char *)&IdentifierOffsets.front(),
(const char *)data(IdentifierOffsets),
IdentifierOffsets.size() * sizeof(uint32_t));
}