1// Copyright (c) 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "tools/gn/location.h"
6
7#include "base/logging.h"
8#include "base/strings/string_number_conversions.h"
9#include "tools/gn/input_file.h"
10
11Location::Location()
12    : file_(NULL),
13      line_number_(-1),
14      char_offset_(-1) {
15}
16
17Location::Location(const InputFile* file, int line_number, int char_offset)
18    : file_(file),
19      line_number_(line_number),
20      char_offset_(char_offset) {
21}
22
23bool Location::operator==(const Location& other) const {
24  return other.file_ == file_ &&
25         other.line_number_ == line_number_ &&
26         other.char_offset_ == char_offset_;
27}
28
29bool Location::operator!=(const Location& other) const {
30  return !operator==(other);
31}
32
33bool Location::operator<(const Location& other) const {
34  DCHECK(file_ == other.file_);
35  if (line_number_ != other.line_number_)
36    return line_number_ < other.line_number_;
37  return char_offset_ < other.char_offset_;
38}
39
40std::string Location::Describe(bool include_char_offset) const {
41  if (!file_)
42    return std::string();
43
44  std::string ret;
45  if (file_->friendly_name().empty())
46    ret = file_->name().value();
47  else
48    ret = file_->friendly_name();
49
50  ret += ":";
51  ret += base::IntToString(line_number_);
52  if (include_char_offset) {
53    ret += ":";
54    ret += base::IntToString(char_offset_);
55  }
56  return ret;
57}
58
59LocationRange::LocationRange() {
60}
61
62LocationRange::LocationRange(const Location& begin, const Location& end)
63    : begin_(begin),
64      end_(end) {
65  DCHECK(begin_.file() == end_.file());
66}
67
68LocationRange LocationRange::Union(const LocationRange& other) const {
69  DCHECK(begin_.file() == other.begin_.file());
70  return LocationRange(
71      begin_ < other.begin_ ? begin_ : other.begin_,
72      end_ < other.end_ ? other.end_ : end_);
73}
74