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llvm-project/clang/tools/libclang/CIndexHigh.cpp

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//===- CIndexHigh.cpp - Higher level API functions ------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "CursorVisitor.h"
#include "CXCursor.h"
#include "CXSourceLocation.h"
#include "CXTranslationUnit.h"
#include "clang/Frontend/ASTUnit.h"
#include "clang/AST/DeclObjC.h"
using namespace clang;
using namespace cxcursor;
static void getTopOverriddenMethods(CXTranslationUnit TU,
Decl *D,
SmallVectorImpl<Decl *> &Methods) {
if (!isa<ObjCMethodDecl>(D) && !isa<CXXMethodDecl>(D))
return;
SmallVector<CXCursor, 8> Overridden;
cxcursor::getOverriddenCursors(cxcursor::MakeCXCursor(D, TU), Overridden);
if (Overridden.empty()) {
Methods.push_back(D->getCanonicalDecl());
return;
}
for (SmallVector<CXCursor, 8>::iterator
I = Overridden.begin(), E = Overridden.end(); I != E; ++I)
getTopOverriddenMethods(TU, cxcursor::getCursorDecl(*I), Methods);
}
namespace {
struct FindFileIdRefVisitData {
CXTranslationUnit TU;
FileID FID;
Decl *Dcl;
int SelectorIdIdx;
CXCursorAndRangeVisitor visitor;
typedef SmallVector<Decl *, 8> TopMethodsTy;
TopMethodsTy TopMethods;
FindFileIdRefVisitData(CXTranslationUnit TU, FileID FID,
Decl *D, int selectorIdIdx,
CXCursorAndRangeVisitor visitor)
: TU(TU), FID(FID), SelectorIdIdx(selectorIdIdx), visitor(visitor) {
Dcl = getCanonical(D);
getTopOverriddenMethods(TU, Dcl, TopMethods);
}
ASTContext &getASTContext() const {
return static_cast<ASTUnit *>(TU->TUData)->getASTContext();
}
/// \brief We are looking to find all semantically relevant identifiers,
/// so the definition of "canonical" here is different than in the AST, e.g.
///
/// \code
/// class C {
/// C() {}
/// };
/// \endcode
///
/// we consider the canonical decl of the constructor decl to be the class
/// itself, so both 'C' can be highlighted.
Decl *getCanonical(Decl *D) const {
D = D->getCanonicalDecl();
if (ObjCImplDecl *ImplD = dyn_cast<ObjCImplDecl>(D))
return getCanonical(ImplD->getClassInterface());
if (CXXConstructorDecl *CXXCtorD = dyn_cast<CXXConstructorDecl>(D))
return getCanonical(CXXCtorD->getParent());
return D;
}
bool isHit(Decl *D) const {
D = getCanonical(D);
if (D == Dcl)
return true;
if (isa<ObjCMethodDecl>(D) || isa<CXXMethodDecl>(D))
return isOverriddingMethod(D);
return false;
}
private:
bool isOverriddingMethod(Decl *D) const {
if (std::find(TopMethods.begin(), TopMethods.end(), D) !=
TopMethods.end())
return true;
TopMethodsTy methods;
getTopOverriddenMethods(TU, D, methods);
for (TopMethodsTy::iterator
I = methods.begin(), E = methods.end(); I != E; ++I) {
if (std::find(TopMethods.begin(), TopMethods.end(), *I) !=
TopMethods.end())
return true;
}
return false;
}
};
} // end anonymous namespace.
/// \brief For a macro \arg Loc, returns the file spelling location and sets
/// to \arg isMacroArg whether the spelling resides inside a macro definition or
/// a macro argument.
static SourceLocation getFileSpellingLoc(SourceManager &SM,
SourceLocation Loc,
bool &isMacroArg) {
assert(Loc.isMacroID());
SourceLocation SpellLoc = SM.getImmediateSpellingLoc(Loc);
if (SpellLoc.isMacroID())
return getFileSpellingLoc(SM, SpellLoc, isMacroArg);
isMacroArg = SM.isMacroArgExpansion(Loc);
return SpellLoc;
}
static enum CXChildVisitResult findFileIdRefVisit(CXCursor cursor,
CXCursor parent,
CXClientData client_data) {
CXCursor declCursor = clang_getCursorReferenced(cursor);
if (!clang_isDeclaration(declCursor.kind))
return CXChildVisit_Recurse;
Decl *D = cxcursor::getCursorDecl(declCursor);
FindFileIdRefVisitData *data = (FindFileIdRefVisitData *)client_data;
if (data->isHit(D)) {
cursor = cxcursor::getSelectorIdentifierCursor(data->SelectorIdIdx, cursor);
// We are looking for identifiers to highlight so for objc methods (and
// not a parameter) we can only highlight the selector identifiers.
if ((cursor.kind == CXCursor_ObjCClassMethodDecl ||
cursor.kind == CXCursor_ObjCInstanceMethodDecl) &&
cxcursor::getSelectorIdentifierIndex(cursor) == -1)
return CXChildVisit_Recurse;
if (clang_isExpression(cursor.kind)) {
if (cursor.kind == CXCursor_DeclRefExpr ||
cursor.kind == CXCursor_MemberRefExpr) {
// continue..
} else if (cursor.kind == CXCursor_ObjCMessageExpr &&
cxcursor::getSelectorIdentifierIndex(cursor) != -1) {
// continue..
} else
return CXChildVisit_Recurse;
}
SourceLocation
Loc = cxloc::translateSourceLocation(clang_getCursorLocation(cursor));
SourceLocation SelIdLoc = cxcursor::getSelectorIdentifierLoc(cursor);
if (SelIdLoc.isValid())
Loc = SelIdLoc;
ASTContext &Ctx = data->getASTContext();
SourceManager &SM = Ctx.getSourceManager();
bool isInMacroDef = false;
if (Loc.isMacroID()) {
bool isMacroArg;
Loc = getFileSpellingLoc(SM, Loc, isMacroArg);
isInMacroDef = !isMacroArg;
}
// We are looking for identifiers in a specific file.
std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
if (LocInfo.first != data->FID)
return CXChildVisit_Recurse;
if (isInMacroDef) {
// FIXME: For a macro definition make sure that all expansions
// of it expand to the same reference before allowing to point to it.
return CXChildVisit_Recurse;
}
data->visitor.visit(data->visitor.context, cursor,
cxloc::translateSourceRange(Ctx, Loc));
}
return CXChildVisit_Recurse;
}
static void findIdRefsInFile(CXTranslationUnit TU, CXCursor declCursor,
const FileEntry *File,
CXCursorAndRangeVisitor Visitor) {
assert(clang_isDeclaration(declCursor.kind));
ASTUnit *Unit = static_cast<ASTUnit*>(TU->TUData);
SourceManager &SM = Unit->getSourceManager();
FileID FID = SM.translateFile(File);
Decl *Dcl = cxcursor::getCursorDecl(declCursor);
FindFileIdRefVisitData data(TU, FID, Dcl,
cxcursor::getSelectorIdentifierIndex(declCursor),
Visitor);
if (DeclContext *DC = Dcl->getParentFunctionOrMethod()) {
clang_visitChildren(cxcursor::MakeCXCursor(cast<Decl>(DC), TU),
findFileIdRefVisit, &data);
return;
}
SourceRange Range(SM.getLocForStartOfFile(FID), SM.getLocForEndOfFile(FID));
CursorVisitor FindIdRefsVisitor(TU,
findFileIdRefVisit, &data,
/*VisitPreprocessorLast=*/true,
/*VisitIncludedEntities=*/false,
Range,
/*VisitDeclsOnly=*/true);
FindIdRefsVisitor.visitFileRegion();
}
namespace {
struct FindFileMacroRefVisitData {
ASTUnit &Unit;
const FileEntry *File;
const IdentifierInfo *Macro;
CXCursorAndRangeVisitor visitor;
FindFileMacroRefVisitData(ASTUnit &Unit, const FileEntry *File,
const IdentifierInfo *Macro,
CXCursorAndRangeVisitor visitor)
: Unit(Unit), File(File), Macro(Macro), visitor(visitor) { }
ASTContext &getASTContext() const {
return Unit.getASTContext();
}
};
} // anonymous namespace
static enum CXChildVisitResult findFileMacroRefVisit(CXCursor cursor,
CXCursor parent,
CXClientData client_data) {
const IdentifierInfo *Macro = 0;
if (cursor.kind == CXCursor_MacroDefinition)
Macro = getCursorMacroDefinition(cursor)->getName();
else if (cursor.kind == CXCursor_MacroExpansion)
Macro = getCursorMacroExpansion(cursor)->getName();
if (!Macro)
return CXChildVisit_Continue;
FindFileMacroRefVisitData *data = (FindFileMacroRefVisitData *)client_data;
if (data->Macro != Macro)
return CXChildVisit_Continue;
SourceLocation
Loc = cxloc::translateSourceLocation(clang_getCursorLocation(cursor));
ASTContext &Ctx = data->getASTContext();
SourceManager &SM = Ctx.getSourceManager();
bool isInMacroDef = false;
if (Loc.isMacroID()) {
bool isMacroArg;
Loc = getFileSpellingLoc(SM, Loc, isMacroArg);
isInMacroDef = !isMacroArg;
}
// We are looking for identifiers in a specific file.
std::pair<FileID, unsigned> LocInfo = SM.getDecomposedLoc(Loc);
if (SM.getFileEntryForID(LocInfo.first) != data->File)
return CXChildVisit_Continue;
if (isInMacroDef) {
// FIXME: For a macro definition make sure that all expansions
// of it expand to the same reference before allowing to point to it.
return CXChildVisit_Continue;
}
data->visitor.visit(data->visitor.context, cursor,
cxloc::translateSourceRange(Ctx, Loc));
return CXChildVisit_Continue;
}
static void findMacroRefsInFile(CXTranslationUnit TU, CXCursor Cursor,
const FileEntry *File,
CXCursorAndRangeVisitor Visitor) {
if (Cursor.kind != CXCursor_MacroDefinition &&
Cursor.kind != CXCursor_MacroExpansion)
return;
ASTUnit *Unit = static_cast<ASTUnit*>(TU->TUData);
SourceManager &SM = Unit->getSourceManager();
FileID FID = SM.translateFile(File);
const IdentifierInfo *Macro = 0;
if (Cursor.kind == CXCursor_MacroDefinition)
Macro = getCursorMacroDefinition(Cursor)->getName();
else
Macro = getCursorMacroExpansion(Cursor)->getName();
if (!Macro)
return;
FindFileMacroRefVisitData data(*Unit, File, Macro, Visitor);
SourceRange Range(SM.getLocForStartOfFile(FID), SM.getLocForEndOfFile(FID));
CursorVisitor FindMacroRefsVisitor(TU,
findFileMacroRefVisit, &data,
/*VisitPreprocessorLast=*/false,
/*VisitIncludedEntities=*/false,
Range);
FindMacroRefsVisitor.visitPreprocessedEntitiesInRegion();
}
//===----------------------------------------------------------------------===//
// libclang public APIs.
//===----------------------------------------------------------------------===//
extern "C" {
void clang_findReferencesInFile(CXCursor cursor, CXFile file,
CXCursorAndRangeVisitor visitor) {
bool Logging = ::getenv("LIBCLANG_LOGGING");
if (clang_Cursor_isNull(cursor)) {
if (Logging)
llvm::errs() << "clang_findReferencesInFile: Null cursor\n";
return;
}
if (!file) {
if (Logging)
llvm::errs() << "clang_findReferencesInFile: Null file\n";
return;
}
if (!visitor.visit) {
if (Logging)
llvm::errs() << "clang_findReferencesInFile: Null visitor\n";
return;
}
ASTUnit *CXXUnit = cxcursor::getCursorASTUnit(cursor);
if (!CXXUnit)
return;
ASTUnit::ConcurrencyCheck Check(*CXXUnit);
if (cursor.kind == CXCursor_MacroDefinition ||
cursor.kind == CXCursor_MacroExpansion) {
findMacroRefsInFile(cxcursor::getCursorTU(cursor),
cursor,
static_cast<const FileEntry *>(file),
visitor);
return;
}
// We are interested in semantics of identifiers so for C++ constructor exprs
// prefer type references, e.g.:
//
// return MyStruct();
//
// for 'MyStruct' we'll have a cursor pointing at the constructor decl but
// we are actually interested in the type declaration.
cursor = cxcursor::getTypeRefCursor(cursor);
CXCursor refCursor = clang_getCursorReferenced(cursor);
if (!clang_isDeclaration(refCursor.kind)) {
if (Logging)
llvm::errs() << "clang_findReferencesInFile: cursor is not referencing a "
"declaration\n";
return;
}
findIdRefsInFile(cxcursor::getCursorTU(cursor),
refCursor,
static_cast<const FileEntry *>(file),
visitor);
}
static enum CXVisitorResult _visitCursorAndRange(void *context,
CXCursor cursor,
CXSourceRange range) {
CXCursorAndRangeVisitorBlock block = (CXCursorAndRangeVisitorBlock)context;
return INVOKE_BLOCK2(block, cursor, range);
}
void clang_findReferencesInFileWithBlock(CXCursor cursor,
CXFile file,
CXCursorAndRangeVisitorBlock block) {
CXCursorAndRangeVisitor visitor = { block,
block ? _visitCursorAndRange : 0 };
return clang_findReferencesInFile(cursor, file, visitor);
}
} // end: extern "C"
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