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/CommandLine.h"
12 #include "llvm/Support/raw_ostream.h"
13 
14 using namespace llvm;
15 
16 static cl::opt<cl::boolOrDefault>
17     UseColor("color",
18              cl::desc("use colored syntax highlighting (default=autodetect)"),
19              cl::init(cl::BOU_UNSET));
20 
21 bool WithColor::colorsEnabled(raw_ostream &OS) {
22   if (UseColor == cl::BOU_UNSET)
23     return OS.has_colors();
24   return UseColor == cl::BOU_TRUE;
25 }
26 
27 WithColor::WithColor(raw_ostream &OS, HighlightColor Color) : OS(OS) {
28   // Detect color from terminal type unless the user passed the --color option.
29   if (colorsEnabled(OS)) {
30     switch (Color) {
31     case HighlightColor::Address:
32       OS.changeColor(raw_ostream::YELLOW);
33       break;
34     case HighlightColor::String:
35       OS.changeColor(raw_ostream::GREEN);
36       break;
37     case HighlightColor::Tag:
38       OS.changeColor(raw_ostream::BLUE);
39       break;
40     case HighlightColor::Attribute:
41       OS.changeColor(raw_ostream::CYAN);
42       break;
43     case HighlightColor::Enumerator:
44       OS.changeColor(raw_ostream::MAGENTA);
45       break;
46     case HighlightColor::Macro:
47       OS.changeColor(raw_ostream::RED);
48       break;
49     case HighlightColor::Error:
50       OS.changeColor(raw_ostream::RED, true);
51       break;
52     case HighlightColor::Warning:
53       OS.changeColor(raw_ostream::MAGENTA, true);
54       break;
55     case HighlightColor::Note:
56       OS.changeColor(raw_ostream::BLACK, true);
57       break;
58     }
59   }
60 }
61 
62 raw_ostream &WithColor::error() { return error(errs()); }
63 
64 raw_ostream &WithColor::warning() { return warning(errs()); }
65 
66 raw_ostream &WithColor::note() { return note(errs()); }
67 
68 raw_ostream &WithColor::error(raw_ostream &OS, StringRef Prefix) {
69   if (!Prefix.empty())
70     OS << Prefix << ": ";
71   return WithColor(OS, HighlightColor::Error).get() << "error: ";
72 }
73 
74 raw_ostream &WithColor::warning(raw_ostream &OS, StringRef Prefix) {
75   if (!Prefix.empty())
76     OS << Prefix << ": ";
77   return WithColor(OS, HighlightColor::Warning).get() << "warning: ";
78 }
79 
80 raw_ostream &WithColor::note(raw_ostream &OS, StringRef Prefix) {
81   if (!Prefix.empty())
82     OS << Prefix << ": ";
83   return WithColor(OS, HighlightColor::Note).get() << "note: ";
84 }
85 
86 WithColor::~WithColor() {
87   if (colorsEnabled(OS))
88     OS.resetColor();
89 }
90