forked from OSchip/llvm-project
97 lines
3.5 KiB
C++
97 lines
3.5 KiB
C++
//===- CIndexInclusionStack.cpp - Clang-C Source Indexing Library ---------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines a callback mechanism for clients to get the inclusion
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// stack from a translation unit.
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//
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//===----------------------------------------------------------------------===//
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#include "CIndexer.h"
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#include "CXSourceLocation.h"
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#include "CXTranslationUnit.h"
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#include "clang/AST/DeclVisitor.h"
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#include "clang/Frontend/ASTUnit.h"
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using namespace clang;
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static void getInclusions(const SrcMgr::SLocEntry &(SourceManager::*Getter)(unsigned, bool*) const, unsigned n,
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CXTranslationUnit TU, CXInclusionVisitor CB,
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CXClientData clientData)
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{
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ASTUnit *CXXUnit = cxtu::getASTUnit(TU);
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SourceManager &SM = CXXUnit->getSourceManager();
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ASTContext &Ctx = CXXUnit->getASTContext();
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SmallVector<CXSourceLocation, 10> InclusionStack;
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const bool HasPreamble = SM.getPreambleFileID().isValid();
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for (unsigned i = 0 ; i < n ; ++i) {
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bool Invalid = false;
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const SrcMgr::SLocEntry &SL = (SM.*Getter)(i, &Invalid);
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if (!SL.isFile() || Invalid)
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continue;
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const SrcMgr::FileInfo &FI = SL.getFile();
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if (!FI.getContentCache()->OrigEntry)
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continue;
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// If this is the main file, and there is a preamble, skip this SLoc. The
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// inclusions of the preamble already showed it.
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SourceLocation L = FI.getIncludeLoc();
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if (HasPreamble && CXXUnit->isInMainFileID(L))
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continue;
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// Build the inclusion stack.
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InclusionStack.clear();
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while (L.isValid()) {
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PresumedLoc PLoc = SM.getPresumedLoc(L);
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InclusionStack.push_back(cxloc::translateSourceLocation(Ctx, L));
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L = PLoc.isValid()? PLoc.getIncludeLoc() : SourceLocation();
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}
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// If there is a preamble, the last entry is the "inclusion" of that
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// preamble into the main file, which has the bogus entry of main.c:1:1
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if (HasPreamble && !InclusionStack.empty())
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InclusionStack.pop_back();
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// Callback to the client.
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// FIXME: We should have a function to construct CXFiles.
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CB(static_cast<CXFile>(
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const_cast<FileEntry *>(FI.getContentCache()->OrigEntry)),
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InclusionStack.data(), InclusionStack.size(), clientData);
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}
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}
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void clang_getInclusions(CXTranslationUnit TU, CXInclusionVisitor CB,
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CXClientData clientData) {
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if (cxtu::isNotUsableTU(TU)) {
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LOG_BAD_TU(TU);
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return;
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}
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SourceManager &SM = cxtu::getASTUnit(TU)->getSourceManager();
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const unsigned n = SM.local_sloc_entry_size();
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// In the case where all the SLocEntries are in an external source, traverse
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// those SLocEntries as well. This is the case where we are looking
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// at the inclusion stack of an AST/PCH file. Also, if we are not looking at
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// a AST/PCH file, but this file has a pre-compiled preamble, we also need
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// to look in that file.
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if (n == 1 || SM.getPreambleFileID().isValid()) {
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getInclusions(&SourceManager::getLoadedSLocEntry,
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SM.loaded_sloc_entry_size(), TU, CB, clientData);
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}
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// Not a PCH/AST file. Note, if there is a preamble, it could still be that
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// there are #includes in this file (e.g. for any include after the first
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// declaration).
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if (n != 1)
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getInclusions(&SourceManager::getLocalSLocEntry, n, TU, CB, clientData);
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}
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