C++ PathDiagnosticPiece::getLocation方法代码示例

void PathDiagnostic::resetDiagnosticLocationToMainFile() {
  if (path.empty())
    return;

  PathDiagnosticPiece *LastP = path.back().getPtr();
  assert(LastP);
  const SourceManager &SMgr = LastP->getLocation().getManager();

  // We only need to check if the report ends inside headers, if the last piece
  // is a call piece.
  if (PathDiagnosticCallPiece *CP = dyn_cast<PathDiagnosticCallPiece>(LastP)) {
    CP = getFirstStackedCallToHeaderFile(CP, SMgr);
    if (CP) {
      // Mark the piece.
       CP->setAsLastInMainSourceFile();

      // Update the path diagnostic message.
      const NamedDecl *ND = dyn_cast<NamedDecl>(CP->getCallee());
      if (ND) {
        SmallString<200> buf;
        llvm::raw_svector_ostream os(buf);
        os << " (within a call to '" << ND->getDeclName() << "')";
        appendToDesc(os.str());
      }

      // Reset the report containing declaration and location.
      DeclWithIssue = CP->getCaller();
      Loc = CP->getLocation();
      
      return;
    }
  }
}

static void ReportEvent(raw_ostream &o, const PathDiagnosticPiece& P,
                        const FIDMap& FM,
                        const SourceManager &SM,
                        const LangOptions &LangOpts,
                        unsigned indent,
                        unsigned depth,
                        bool isKeyEvent = false) {

  Indent(o, indent) << "<dict>\n";
  ++indent;

  Indent(o, indent) << "<key>kind</key><string>event</string>\n";

  if (isKeyEvent) {
    Indent(o, indent) << "<key>key_event</key><true/>\n";
  }

  // Output the location.
  FullSourceLoc L = P.getLocation().asLocation();

  Indent(o, indent) << "<key>location</key>\n";
  EmitLocation(o, SM, LangOpts, L, FM, indent);

  // Output the ranges (if any).
  ArrayRef<SourceRange> Ranges = P.getRanges();

  if (!Ranges.empty()) {
    Indent(o, indent) << "<key>ranges</key>\n";
    Indent(o, indent) << "<array>\n";
    ++indent;
    for (ArrayRef<SourceRange>::iterator I = Ranges.begin(), E = Ranges.end();
         I != E; ++I) {
      EmitRange(o, SM, LangOpts, CharSourceRange::getTokenRange(*I), FM,
                indent + 1);
    }
    --indent;
    Indent(o, indent) << "</array>\n";
  }
  
  // Output the call depth.
  Indent(o, indent) << "<key>depth</key>"
                    << "<integer>" << depth << "</integer>\n";

  // Output the text.
  assert(!P.getString().empty());
  Indent(o, indent) << "<key>extended_message</key>\n";
  Indent(o, indent);
  EmitString(o, P.getString()) << '\n';

  // Output the short text.
  // FIXME: Really use a short string.
  Indent(o, indent) << "<key>message</key>\n";
  Indent(o, indent);
  EmitString(o, P.getString()) << '\n';
  
  // Finish up.
  --indent;
  Indent(o, indent); o << "</dict>\n";
}

static void ReportEvent(raw_ostream &o, const PathDiagnosticPiece& P,
                        const FIDMap& FM,
                        const SourceManager &SM,
                        const LangOptions &LangOpts,
                        unsigned indent,
                        unsigned depth,
                        bool isKeyEvent = false) {

  Indent(o, indent) << "<dict>\n";
  ++indent;

  Indent(o, indent) << "<key>kind</key><string>event</string>\n";

  if (isKeyEvent) {
    Indent(o, indent) << "<key>key_event</key><true/>\n";
  }

  // Output the location.
  FullSourceLoc L = P.getLocation().asLocation();

  Indent(o, indent) << "<key>location</key>\n";
  EmitLocation(o, SM, L, FM, indent);

  // Output the ranges (if any).
  ArrayRef<SourceRange> Ranges = P.getRanges();

  if (!Ranges.empty()) {
    Indent(o, indent) << "<key>ranges</key>\n";
    Indent(o, indent) << "<array>\n";
    ++indent;
    for (auto &R : Ranges)
      EmitRange(o, SM,
                Lexer::getAsCharRange(SM.getExpansionRange(R), SM, LangOpts),
                FM, indent + 1);
    --indent;
    Indent(o, indent) << "</array>\n";
  }

  // Output the call depth.
  Indent(o, indent) << "<key>depth</key>";
  EmitInteger(o, depth) << '\n';

  // Output the text.
  assert(!P.getString().empty());
  Indent(o, indent) << "<key>extended_message</key>\n";
  Indent(o, indent);
  EmitString(o, P.getString()) << '\n';

  // Output the short text.
  // FIXME: Really use a short string.
  Indent(o, indent) << "<key>message</key>\n";
  Indent(o, indent);
  EmitString(o, P.getString()) << '\n';

  // Finish up.
  --indent;
  Indent(o, indent); o << "</dict>\n";
}

static Optional<bool> comparePiece(const PathDiagnosticPiece &X,
                                   const PathDiagnosticPiece &Y) {
  if (X.getKind() != Y.getKind())
    return X.getKind() < Y.getKind();

  FullSourceLoc XL = X.getLocation().asLocation();
  FullSourceLoc YL = Y.getLocation().asLocation();
  if (XL != YL)
    return XL.isBeforeInTranslationUnitThan(YL);

  if (X.getString() != Y.getString())
    return X.getString() < Y.getString();

  if (X.getRanges().size() != Y.getRanges().size())
    return X.getRanges().size() < Y.getRanges().size();

  const SourceManager &SM = XL.getManager();

  for (unsigned i = 0, n = X.getRanges().size(); i < n; ++i) {
    SourceRange XR = X.getRanges()[i];
    SourceRange YR = Y.getRanges()[i];
    if (XR != YR) {
      if (XR.getBegin() != YR.getBegin())
        return SM.isBeforeInTranslationUnit(XR.getBegin(), YR.getBegin());
      return SM.isBeforeInTranslationUnit(XR.getEnd(), YR.getEnd());
    }
  }

  switch (X.getKind()) {
    case PathDiagnosticPiece::ControlFlow:
      return compareControlFlow(cast<PathDiagnosticControlFlowPiece>(X),
                                cast<PathDiagnosticControlFlowPiece>(Y));
    case PathDiagnosticPiece::Event:
    case PathDiagnosticPiece::Note:
      return None;
    case PathDiagnosticPiece::Macro:
      return compareMacro(cast<PathDiagnosticMacroPiece>(X),
                          cast<PathDiagnosticMacroPiece>(Y));
    case PathDiagnosticPiece::Call:
      return compareCall(cast<PathDiagnosticCallPiece>(X),
                         cast<PathDiagnosticCallPiece>(Y));
  }
  llvm_unreachable("all cases handled");
}

static void ReportEvent(llvm::raw_ostream& o, const PathDiagnosticPiece& P,
                        const FIDMap& FM,
                        const SourceManager &SM,
                        const LangOptions &LangOpts,
                        unsigned indent) {

  Indent(o, indent) << "<dict>\n";
  ++indent;

  Indent(o, indent) << "<key>kind</key><string>event</string>\n";

  // Output the location.
  FullSourceLoc L = P.getLocation().asLocation();

  Indent(o, indent) << "<key>location</key>\n";
  EmitLocation(o, SM, LangOpts, L, FM, indent);

  // Output the ranges (if any).
  PathDiagnosticPiece::range_iterator RI = P.ranges_begin(),
  RE = P.ranges_end();

  if (RI != RE) {
    Indent(o, indent) << "<key>ranges</key>\n";
    Indent(o, indent) << "<array>\n";
    ++indent;
    for (; RI != RE; ++RI)
      EmitRange(o, SM, LangOpts, *RI, FM, indent+1);
    --indent;
    Indent(o, indent) << "</array>\n";
  }

  // Output the text.
  assert(!P.getString().empty());
  Indent(o, indent) << "<key>extended_message</key>\n";
  Indent(o, indent);
  EmitString(o, P.getString()) << '\n';

  // Output the short text.
  // FIXME: Really use a short string.
  Indent(o, indent) << "<key>message</key>\n";
  EmitString(o, P.getString()) << '\n';

  // Finish up.
  --indent;
  Indent(o, indent); o << "</dict>\n";
}

PathDiagnosticLocation PathDiagnostic::getLocation() const {
    assert(path.size() > 0 &&
           "getLocation() requires a non-empty PathDiagnostic.");

    PathDiagnosticPiece *p = path.rbegin()->getPtr();

    while (true) {
        if (PathDiagnosticCallPiece *cp = dyn_cast<PathDiagnosticCallPiece>(p)) {
            assert(!cp->path.empty());
            p = cp->path.rbegin()->getPtr();
            continue;
        }
        break;
    }

    return p->getLocation();
}

void HTMLDiagnostics::HandlePiece(Rewriter& R, FileID BugFileID,
                                  const PathDiagnosticPiece& P,
                                  unsigned num, unsigned max) {

  // For now, just draw a box above the line in question, and emit the
  // warning.
  FullSourceLoc Pos = P.getLocation().asLocation();

  if (!Pos.isValid())
    return;

  SourceManager &SM = R.getSourceMgr();
  assert(&Pos.getManager() == &SM && "SourceManagers are different!");
  std::pair<FileID, unsigned> LPosInfo = SM.getDecomposedExpansionLoc(Pos);

  if (LPosInfo.first != BugFileID)
    return;

  const llvm::MemoryBuffer *Buf = SM.getBuffer(LPosInfo.first);
  const char* FileStart = Buf->getBufferStart();

  // Compute the column number.  Rewind from the current position to the start
  // of the line.
  unsigned ColNo = SM.getColumnNumber(LPosInfo.first, LPosInfo.second);
  const char *TokInstantiationPtr =Pos.getExpansionLoc().getCharacterData();
  const char *LineStart = TokInstantiationPtr-ColNo;

  // Compute LineEnd.
  const char *LineEnd = TokInstantiationPtr;
  const char* FileEnd = Buf->getBufferEnd();
  while (*LineEnd != '\n' && LineEnd != FileEnd)
    ++LineEnd;

  // Compute the margin offset by counting tabs and non-tabs.
  unsigned PosNo = 0;
  for (const char* c = LineStart; c != TokInstantiationPtr; ++c)
    PosNo += *c == '\t' ? 8 : 1;

  // Create the html for the message.

  const char *Kind = 0;
  switch (P.getKind()) {
  case PathDiagnosticPiece::Call:
      llvm_unreachable("Calls should already be handled");
  case PathDiagnosticPiece::Event:  Kind = "Event"; break;
  case PathDiagnosticPiece::ControlFlow: Kind = "Control"; break;
    // Setting Kind to "Control" is intentional.
  case PathDiagnosticPiece::Macro: Kind = "Control"; break;
  }

  std::string sbuf;
  llvm::raw_string_ostream os(sbuf);

  os << "\n<tr><td class=\"num\"></td><td class=\"line\"><div id=\"";

  if (num == max)
    os << "EndPath";
  else
    os << "Path" << num;

  os << "\" class=\"msg";
  if (Kind)
    os << " msg" << Kind;
  os << "\" style=\"margin-left:" << PosNo << "ex";

  // Output a maximum size.
  if (!isa<PathDiagnosticMacroPiece>(P)) {
    // Get the string and determining its maximum substring.
    const std::string& Msg = P.getString();
    unsigned max_token = 0;
    unsigned cnt = 0;
    unsigned len = Msg.size();

    for (std::string::const_iterator I=Msg.begin(), E=Msg.end(); I!=E; ++I)
      switch (*I) {
      default:
        ++cnt;
        continue;
      case ' ':
      case '\t':
      case '\n':
        if (cnt > max_token) max_token = cnt;
        cnt = 0;
      }

    if (cnt > max_token)
      max_token = cnt;

    // Determine the approximate size of the message bubble in em.
    unsigned em;
    const unsigned max_line = 120;

    if (max_token >= max_line)
      em = max_token / 2;
    else {
      unsigned characters = max_line;
      unsigned lines = len / max_line;

      if (lines > 0) {
        for (; characters > max_token; --characters)
//.........这里部分代码省略.........