path: root/lib/Frontend/TextDiagnostic.cpp

//===--- TextDiagnostic.cpp - Text Diagnostic Pretty-Printing -------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "clang/Frontend/TextDiagnostic.h"
#include "clang/Basic/CharInfo.h"
#include "clang/Basic/DiagnosticOptions.h"
#include "clang/Basic/FileManager.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Lex/Lexer.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Locale.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.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 templateColor =
  raw_ostream::CYAN;
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 Add highlights to differences in template strings.
static void applyTemplateHighlighting(raw_ostream &OS, StringRef Str,
                                      bool &Normal, bool Bold) {
  while (1) {
    size_t Pos = Str.find(ToggleHighlight);
    OS << Str.slice(0, Pos);
    if (Pos == StringRef::npos)
      break;

    Str = Str.substr(Pos + 1);
    if (Normal)
      OS.changeColor(templateColor, true);
    else {
      OS.resetColor();
      if (Bold)
        OS.changeColor(savedColor, true);
    }
    Normal = !Normal;
  }
}

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

static int bytesSincePreviousTabOrLineBegin(StringRef SourceLine, size_t i) {
  int bytes = 0;
  while (0<i) {
    if (SourceLine[--i]=='\t')
      break;
    ++bytes;
  }
  return bytes;
}

/// \brief returns a printable representation of first item from input range
///
/// This function returns a printable representation of the next item in a line
///  of source. If the next byte begins a valid and printable character, that
///  character is returned along with 'true'.
///
/// Otherwise, if the next byte begins a valid, but unprintable character, a
///  printable, escaped representation of the character is returned, along with
///  'false'. Otherwise a printable, escaped representation of the next byte
///  is returned along with 'false'.
///
/// \note The index is updated to be used with a subsequent call to
///        print