contrib/llvm/lib/Support/WithColor.cpp

   1 //===- WithColor.cpp ------------------------------------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/Support/WithColor.h"
  11 #include "llvm/Support/raw_ostream.h"
  12
  13 using namespace llvm;
  14
  15 cl::OptionCategory llvm::ColorCategory("Color Options");
  16
  17 static cl::opt<cl::boolOrDefault>
  18     UseColor("color", cl::cat(ColorCategory),
  19              cl::desc("Use colors in output (default=autodetect)"),
  20              cl::init(cl::BOU_UNSET));
  21
  22 bool WithColor::colorsEnabled(raw_ostream &OS) {
  23   if (UseColor == cl::BOU_UNSET)
  24     return OS.has_colors();
  25   return UseColor == cl::BOU_TRUE;
  26 }
  27
  28 WithColor::WithColor(raw_ostream &OS, HighlightColor Color) : OS(OS) {
  29   // Detect color from terminal type unless the user passed the --color option.
  30   if (colorsEnabled(OS)) {
  31     switch (Color) {
  32     case HighlightColor::Address:
  33       OS.changeColor(raw_ostream::YELLOW);
  34       break;
  35     case HighlightColor::String:
  36       OS.changeColor(raw_ostream::GREEN);
  37       break;
  38     case HighlightColor::Tag:
  39       OS.changeColor(raw_ostream::BLUE);
  40       break;
  41     case HighlightColor::Attribute:
  42       OS.changeColor(raw_ostream::CYAN);
  43       break;
  44     case HighlightColor::Enumerator:
  45       OS.changeColor(raw_ostream::MAGENTA);
  46       break;
  47     case HighlightColor::Macro:
  48       OS.changeColor(raw_ostream::RED);
  49       break;
  50     case HighlightColor::Error:
  51       OS.changeColor(raw_ostream::RED, true);
  52       break;
  53     case HighlightColor::Warning:
  54       OS.changeColor(raw_ostream::MAGENTA, true);
  55       break;
  56     case HighlightColor::Note:
  57       OS.changeColor(raw_ostream::BLACK, true);
  58       break;
  59     }
  60   }
  61 }
  62
  63 raw_ostream &WithColor::error() { return error(errs()); }
  64
  65 raw_ostream &WithColor::warning() { return warning(errs()); }
  66
  67 raw_ostream &WithColor::note() { return note(errs()); }
  68
  69 raw_ostream &WithColor::error(raw_ostream &OS, StringRef Prefix) {
  70   if (!Prefix.empty())
  71     OS << Prefix << ": ";
  72   return WithColor(OS, HighlightColor::Error).get() << "error: ";
  73 }
  74
  75 raw_ostream &WithColor::warning(raw_ostream &OS, StringRef Prefix) {
  76   if (!Prefix.empty())
  77     OS << Prefix << ": ";
  78   return WithColor(OS, HighlightColor::Warning).get() << "warning: ";
  79 }
  80
  81 raw_ostream &WithColor::note(raw_ostream &OS, StringRef Prefix) {
  82   if (!Prefix.empty())
  83     OS << Prefix << ": ";
  84   return WithColor(OS, HighlightColor::Note).get() << "note: ";
  85 }
  86
  87 WithColor::~WithColor() {
  88   if (colorsEnabled(OS))
  89     OS.resetColor();
  90 }