path: root/lib/Frontend/TextDiagnosticPrinter.cpp

//===--- TextDiagnosticPrinter.cpp - Diagnostic Printer -------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This diagnostic client prints out their diagnostic messages.
//
//===----------------------------------------------------------------------===//

#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Frontend/DiagnosticOptions.h"
#include "clang/Lex/Lexer.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include <algorithm>
using namespace clang;

static const enum raw_ostream::Colors noteColor =
  raw_ostream::BLACK;
static const enum raw_ostream::Colors fixitColor =
  raw_ostream::GREEN;
static const enum raw_ostream::Colors caretColor =
  raw_ostream::GREEN;
static const enum raw_ostream::Colors warningColor =
  raw_ostream::MAGENTA;
static const enum raw_ostream::Colors errorColor = raw_ostream::RED;
static const enum raw_ostream::Colors fatalColor = raw_ostream::RED;
// Used for changing only the bold attribute.
static const enum raw_ostream::Colors savedColor =
  raw_ostream::SAVEDCOLOR;

/// \brief Number of spaces to indent when word-wrapping.
const unsigned WordWrapIndentation = 6;

TextDiagnosticPrinter::TextDiagnosticPrinter(raw_ostream &os,
                                             const DiagnosticOptions &diags,
                                             bool _OwnsOutputStream)
  : OS(os), LangOpts(0), DiagOpts(&diags),
    LastCaretDiagnosticWasNote(0),
    OwnsOutputStream(_OwnsOutputStream) {
}

TextDiagnosticPrinter::~TextDiagnosticPrinter() {
  if (OwnsOutputStream)
    delete &OS;
}

/// \brief Helper to recursivly walk up the include stack and print each layer
/// on the way back down.
static void PrintIncludeStackRecursively(raw_ostream &OS,
                                         const SourceManager &SM,
                                         SourceLocation Loc,
                                         bool ShowLocation) {
  if (Loc.isInvalid())
    return;

  PresumedLoc PLoc = SM.getPresumedLoc(Loc);
  if (PLoc.isInvalid())
    return;

  // Print out the other include frames first.
  PrintIncludeStackRecursively(OS, SM, PLoc.getIncludeLoc(), ShowLocation);

  if (ShowLocation)
    OS << "In file included from " << PLoc.getFilename()
       << ':' << PLoc.getLine() << ":\n";
  else
    OS << "In included file:\n";
}

/// \brief Prints an include stack when appropriate for a particular diagnostic
/// level and location.
///
/// This routine handles all the logic of suppressing particular include stacks
/// (such as those for notes) and duplicate include stacks when repeated
/// warnings occur within the same file. It also handles the logic of
/// customizing the formatting and display of the include stack.
///
/// \param Level The diagnostic level of the message this stack pertains to.
/// \param Loc   The include location of the current file (not the diagnostic
///              location).
void TextDiagnosticPrinter::PrintIncludeStack(Diagnostic::Level Level,
                                              SourceLocation Loc,
                                              const SourceManager &SM) {