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      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 
     11 Location::Location()
     12     : file_(NULL),
     13       line_number_(-1),
     14       char_offset_(-1) {
     15 }
     16 
     17 Location::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 
     23 bool 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 
     29 bool Location::operator!=(const Location& other) const {
     30   return !operator==(other);
     31 }
     32 
     33 bool 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 
     40 std::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 
     59 LocationRange::LocationRange() {
     60 }
     61 
     62 LocationRange::LocationRange(const Location& begin, const Location& end)
     63     : begin_(begin),
     64       end_(end) {
     65   DCHECK(begin_.file() == end_.file());
     66 }
     67 
     68 LocationRange 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