| // Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef TOOLS_GN_LOCATION_H_ |
| #define TOOLS_GN_LOCATION_H_ |
| |
| #include <algorithm> |
| |
| #include "base/logging.h" |
| |
| class InputFile; |
| |
| // Represents a place in a source file. Used for error reporting. |
| class Location { |
| public: |
| Location() |
| : file_(NULL), |
| line_number_(-1), |
| char_offset_(-1) { |
| } |
| Location(const InputFile* file, int line_number, int char_offset) |
| : file_(file), |
| line_number_(line_number), |
| char_offset_(char_offset) { |
| } |
| |
| const InputFile* file() const { return file_; } |
| int line_number() const { return line_number_; } |
| int char_offset() const { return char_offset_; } |
| |
| bool operator==(const Location& other) const { |
| return other.file_ == file_ && |
| other.line_number_ == line_number_ && |
| other.char_offset_ == char_offset_; |
| } |
| |
| bool operator<(const Location& other) const { |
| DCHECK(file_ == other.file_); |
| if (line_number_ != other.line_number_) |
| return line_number_ < other.line_number_; |
| return char_offset_ < other.char_offset_; |
| } |
| |
| private: |
| const InputFile* file_; // Null when unset. |
| int line_number_; // -1 when unset. |
| int char_offset_; // -1 when unset. |
| }; |
| |
| // Represents a range in a source file. Used for error reporting. |
| // The end is exclusive i.e. [begin, end) |
| class LocationRange { |
| public: |
| LocationRange() {} |
| LocationRange(const Location& begin, const Location& end) |
| : begin_(begin), |
| end_(end) { |
| DCHECK(begin_.file() == end_.file()); |
| } |
| |
| const Location& begin() const { return begin_; } |
| const Location& end() const { return end_; } |
| |
| LocationRange Union(const LocationRange& other) const { |
| DCHECK(begin_.file() == other.begin_.file()); |
| return LocationRange( |
| begin_ < other.begin_ ? begin_ : other.begin_, |
| end_ < other.end_ ? other.end_ : end_); |
| } |
| |
| private: |
| Location begin_; |
| Location end_; |
| }; |
| |
| #endif // TOOLS_GN_LOCATION_H_ |