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100 lines
3.0 KiB
C++
100 lines
3.0 KiB
C++
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//===- CTagsEmitter.cpp - Generate ctags-compatible index ------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This tablegen backend emits an index of definitions in ctags(1) format.
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// A helper script, utils/TableGen/tdtags, provides an easier-to-use
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// interface; run 'tdtags -H' for documentation.
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//
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//===----------------------------------------------------------------------===//
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#define DEBUG_TYPE "ctags-emitter"
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#include "llvm/Support/SourceMgr.h"
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#include "llvm/Support/MemoryBuffer.h"
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#include "llvm/TableGen/Error.h"
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#include "llvm/TableGen/Record.h"
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#include "llvm/TableGen/TableGenBackend.h"
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#include <algorithm>
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#include <string>
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#include <vector>
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using namespace llvm;
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namespace llvm { extern SourceMgr SrcMgr; }
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namespace {
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class Tag {
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private:
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const std::string *Id;
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SMLoc Loc;
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public:
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Tag(const std::string &Name, const SMLoc Location)
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: Id(&Name), Loc(Location) {}
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int operator<(const Tag &B) const { return *Id < *B.Id; }
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void emit(raw_ostream &OS) const {
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int BufferID = SrcMgr.FindBufferContainingLoc(Loc);
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MemoryBuffer *CurMB = SrcMgr.getBufferInfo(BufferID).Buffer;
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const char *BufferName = CurMB->getBufferIdentifier();
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std::pair<unsigned, unsigned> LineAndColumn = SrcMgr.getLineAndColumn(Loc);
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OS << *Id << "\t" << BufferName << "\t" << LineAndColumn.first << "\n";
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}
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};
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class CTagsEmitter {
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private:
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RecordKeeper &Records;
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public:
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CTagsEmitter(RecordKeeper &R) : Records(R) {}
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void run(raw_ostream &OS);
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private:
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static SMLoc locate(const Record *R);
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};
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} // End anonymous namespace.
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SMLoc CTagsEmitter::locate(const Record *R) {
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ArrayRef<SMLoc> Locs = R->getLoc();
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if (Locs.empty()) {
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SMLoc NullLoc;
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return NullLoc;
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}
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return Locs.front();
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}
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void CTagsEmitter::run(raw_ostream &OS) {
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const std::map<std::string, Record *> &Classes = Records.getClasses();
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const std::map<std::string, Record *> &Defs = Records.getDefs();
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std::vector<Tag> Tags;
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// Collect tags.
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Tags.reserve(Classes.size() + Defs.size());
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for (std::map<std::string, Record *>::const_iterator I = Classes.begin(),
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E = Classes.end();
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I != E; ++I)
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Tags.push_back(Tag(I->first, locate(I->second)));
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for (std::map<std::string, Record *>::const_iterator I = Defs.begin(),
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E = Defs.end();
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I != E; ++I)
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Tags.push_back(Tag(I->first, locate(I->second)));
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// Emit tags.
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std::sort(Tags.begin(), Tags.end());
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OS << "!_TAG_FILE_FORMAT\t1\t/original ctags format/\n";
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OS << "!_TAG_FILE_SORTED\t1\t/0=unsorted, 1=sorted, 2=foldcase/\n";
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for (std::vector<Tag>::const_iterator I = Tags.begin(), E = Tags.end();
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I != E; ++I)
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I->emit(OS);
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}
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namespace llvm {
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void EmitCTags(RecordKeeper &RK, raw_ostream &OS) { CTagsEmitter(RK).run(OS); }
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} // End llvm namespace.
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