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[clang] Adding an API to create a CXStringSet from a Vector of StringRefs #136773

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[clang] Adding an API to create a CXStringSet from a Vector of StringRefs #136773

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7f39ebc
Adding CXStringSet *createSet that takes a vector of StringRef as input.
qiongsiwu Apr 22, 2025
506c91d
Revise so that we can create an interface to avoid string copying.
qiongsiwu Apr 22, 2025
f3df957
Fix function prototype.
qiongsiwu Apr 22, 2025
ea4e8c6
Updating comments.
qiongsiwu Apr 23, 2025
cf7ed08
Remove unnecessary ArrayRef constructor.
qiongsiwu Apr 23, 2025
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19 changes: 16 additions & 3 deletions clang/tools/libclang/CXString.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -107,15 +107,28 @@ CXString createCXString(CXStringBuf *buf) {
return Str;
}

CXStringSet *createSet(const std::vector<std::string> &Strings) {
template <typename StringTy, bool Copy>
static CXStringSet *createSetImpl(ArrayRef<StringTy> Strings) {
CXStringSet *Set = new CXStringSet;
Set->Count = Strings.size();
Set->Strings = new CXString[Set->Count];
for (unsigned SI = 0, SE = Set->Count; SI < SE; ++SI)
Set->Strings[SI] = createDup(Strings[SI]);
for (unsigned SI = 0, SE = Set->Count; SI < SE; ++SI) {
if constexpr (Copy) {
Set->Strings[SI] = createDup(Strings[SI]);
} else {
Set->Strings[SI] = createRef(Strings[SI]);
}
}
return Set;
}

CXStringSet *createSet(const std::vector<std::string> &Strings) {
return createSetImpl<std::string, true>(ArrayRef<std::string>(Strings));
}

CXStringSet *createRefSet(ArrayRef<StringRef> Strings) {
return createSetImpl<StringRef, false>(Strings);
}

//===----------------------------------------------------------------------===//
// String pools.
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7 changes: 6 additions & 1 deletion clang/tools/libclang/CXString.h
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Expand Up @@ -67,8 +67,14 @@ CXString createRef(std::string String) = delete;
/// Create a CXString object that is backed by a string buffer.
CXString createCXString(CXStringBuf *buf);

/// Create a CXStringSet object that owns the strings. Such an object should be
/// disposed with clang_disposeStringSet.
CXStringSet *createSet(const std::vector<std::string> &Strings);

/// Create a CXStringSet object that does not own the strings. Such an object
/// should still be disposed with clang_disposeStringSet.
CXStringSet *createRefSet(ArrayRef<StringRef> Strings);

/// A string pool used for fast allocation/deallocation of strings.
class CXStringPool {
public:
Expand Down Expand Up @@ -105,4 +111,3 @@ static inline StringRef getContents(const CXUnsavedFile &UF) {
}

#endif

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