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//===- CXExtractAPI.cpp - libclang APIs for manipulating CXAPISet ---------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines all libclang APIs related to manipulation CXAPISet
//
//===----------------------------------------------------------------------===//
#include "CXCursor.h"
#include "CXString.h"
#include "CXTranslationUnit.h"
#include "clang-c/CXErrorCode.h"
#include "clang-c/Documentation.h"
#include "clang-c/Index.h"
#include "clang-c/Platform.h"
#include "clang/AST/Decl.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/ExtractAPI/API.h"
#include "clang/ExtractAPI/ExtractAPIVisitor.h"
#include "clang/ExtractAPI/Serialization/SymbolGraphSerializer.h"
#include "clang/Frontend/ASTUnit.h"
#include "clang/Frontend/FrontendOptions.h"
#include "clang/Index/USRGeneration.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/CBindingWrapping.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/JSON.h"
#include "llvm/Support/raw_ostream.h"
using namespace clang;
using namespace clang::extractapi;
DEFINE_SIMPLE_CONVERSION_FUNCTIONS(APISet, CXAPISet)
static void WalkupFromMostDerivedType(ExtractAPIVisitor &Visitor, Decl *D);
template <typename DeclTy>
static bool WalkupParentContext(DeclContext *Parent,
ExtractAPIVisitor &Visitor) {
if (auto *D = dyn_cast<DeclTy>(Parent)) {
WalkupFromMostDerivedType(Visitor, D);
return true;
}
return false;
}
static void WalkupFromMostDerivedType(ExtractAPIVisitor &Visitor, Decl *D) {
switch (D->getKind()) {
#define ABSTRACT_DECL(DECL)
#define DECL(CLASS, BASE) \
case Decl::CLASS: \
Visitor.WalkUpFrom##CLASS##Decl(static_cast<CLASS##Decl *>(D)); \
break;
#include "clang/AST/DeclNodes.inc"
}
for (auto *Parent = D->getDeclContext(); Parent != nullptr;
Parent = Parent->getParent()) {
if (WalkupParentContext<ObjCContainerDecl>(Parent, Visitor))
return;
if (WalkupParentContext<TagDecl>(Parent, Visitor))
return;
}
}
static CXString GenerateCXStringFromSymbolGraphData(llvm::json::Object Obj) {
llvm::SmallString<0> BackingString;
llvm::raw_svector_ostream OS(BackingString);
OS << Value(std::move(Obj));
return cxstring::createDup(BackingString.str());
}
enum CXErrorCode clang_createAPISet(CXTranslationUnit tu, CXAPISet *out_api) {
if (cxtu::isNotUsableTU(tu) || !out_api)
return CXError_InvalidArguments;
ASTUnit *Unit = cxtu::getASTUnit(tu);
auto &Ctx = Unit->getASTContext();
auto Lang = Unit->getInputKind().getLanguage();
APISet *API = new APISet(Ctx.getTargetInfo().getTriple(), Lang,
Unit->getMainFileName().str());
ExtractAPIVisitor Visitor(
Ctx, [](SourceLocation Loc) { return true; }, *API);
for (auto It = Unit->top_level_begin(); It != Unit->top_level_end(); ++It) {
Visitor.TraverseDecl(*It);
}
*out_api = wrap(API);
return CXError_Success;
}
void clang_disposeAPISet(CXAPISet api) { delete unwrap(api); }
CXString clang_getSymbolGraphForUSR(const char *usr, CXAPISet api) {
auto *API = unwrap(api);
if (auto SGF = SymbolGraphSerializer::serializeSingleSymbolSGF(usr, *API))
return GenerateCXStringFromSymbolGraphData(std::move(*SGF));
return cxstring::createNull();
}
CXString clang_getSymbolGraphForCursor(CXCursor cursor) {
CXCursorKind Kind = clang_getCursorKind(cursor);
if (clang_isDeclaration(Kind)) {
const Decl *D = cxcursor::getCursorDecl(cursor);
if (!D)
return cxstring::createNull();
CXTranslationUnit TU = cxcursor::getCursorTU(cursor);
if (!TU)
return cxstring::createNull();
ASTUnit *Unit = cxtu::getASTUnit(TU);
auto &Ctx = Unit->getASTContext();
auto Lang = Unit->getInputKind().getLanguage();
APISet API(Ctx.getTargetInfo().getTriple(), Lang,
Unit->getMainFileName().str());
ExtractAPIVisitor Visitor(
Ctx, [](SourceLocation Loc) { return true; }, API);
SmallString<128> USR;
if (index::generateUSRForDecl(D, USR))
return cxstring::createNull();
WalkupFromMostDerivedType(Visitor, const_cast<Decl *>(D));
auto *Record = API.findRecordForUSR(USR);
if (!Record)
return cxstring::createNull();
for (const auto &Fragment : Record->Declaration.getFragments()) {
if (Fragment.Declaration)
WalkupFromMostDerivedType(Visitor,
const_cast<Decl *>(Fragment.Declaration));
}
if (auto SGF = SymbolGraphSerializer::serializeSingleSymbolSGF(USR, API))
return GenerateCXStringFromSymbolGraphData(std::move(*SGF));
}
return cxstring::createNull();
}
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