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,
18                   int line_number,
19                   int char_offset,
20                   int byte)
21    : file_(file),
22      line_number_(line_number),
23      char_offset_(char_offset),
24      byte_(byte) {
25}
26
27bool Location::operator==(const Location& other) const {
28  return other.file_ == file_ &&
29         other.line_number_ == line_number_ &&
30         other.char_offset_ == char_offset_;
31}
32
33bool Location::operator!=(const Location& other) const {
34  return !operator==(other);
35}
36
37bool Location::operator<(const Location& other) const {
38  DCHECK(file_ == other.file_);
39  if (line_number_ != other.line_number_)
40    return line_number_ < other.line_number_;
41  return char_offset_ < other.char_offset_;
42}
43
44std::string Location::Describe(bool include_char_offset) const {
45  if (!file_)
46    return std::string();
47
48  std::string ret;
49  if (file_->friendly_name().empty())
50    ret = file_->name().value();
51  else
52    ret = file_->friendly_name();
53
54  ret += ":";
55  ret += base::IntToString(line_number_);
56  if (include_char_offset) {
57    ret += ":";
58    ret += base::IntToString(char_offset_);
59  }
60  return ret;
61}
62
63LocationRange::LocationRange() {
64}
65
66LocationRange::LocationRange(const Location& begin, const Location& end)
67    : begin_(begin),
68      end_(end) {
69  DCHECK(begin_.file() == end_.file());
70}
71
72LocationRange LocationRange::Union(const LocationRange& other) const {
73  DCHECK(begin_.file() == other.begin_.file());
74  return LocationRange(
75      begin_ < other.begin_ ? begin_ : other.begin_,
76      end_ < other.end_ ? other.end_ : end_);
77}
78