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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 #ifndef TOOLS_GN_LOCATION_H_ |
| 6 #define TOOLS_GN_LOCATION_H_ |
| 7 |
| 8 #include <algorithm> |
| 9 |
| 10 #include "base/logging.h" |
| 11 |
| 12 class InputFile; |
| 13 |
| 14 // Represents a place in a source file. Used for error reporting. |
| 15 class Location { |
| 16 public: |
| 17 Location() |
| 18 : file_(NULL), |
| 19 line_number_(-1), |
| 20 char_offset_(-1) { |
| 21 } |
| 22 Location(const InputFile* file, int line_number, int char_offset) |
| 23 : file_(file), |
| 24 line_number_(line_number), |
| 25 char_offset_(char_offset) { |
| 26 } |
| 27 |
| 28 const InputFile* file() const { return file_; } |
| 29 int line_number() const { return line_number_; } |
| 30 int char_offset() const { return char_offset_; } |
| 31 |
| 32 bool operator==(const Location& other) const { |
| 33 return other.file_ == file_ && |
| 34 other.line_number_ == line_number_ && |
| 35 other.char_offset_ == char_offset_; |
| 36 } |
| 37 |
| 38 bool operator<(const Location& other) const { |
| 39 DCHECK(file_ == other.file_); |
| 40 if (line_number_ != other.line_number_) |
| 41 return line_number_ < other.line_number_; |
| 42 return char_offset_ < other.char_offset_; |
| 43 } |
| 44 |
| 45 private: |
| 46 const InputFile* file_; // Null when unset. |
| 47 int line_number_; // -1 when unset. |
| 48 int char_offset_; // -1 when unset. |
| 49 }; |
| 50 |
| 51 // Represents a range in a source file. Used for error reporting. |
| 52 // The end is exclusive i.e. [begin, end) |
| 53 class LocationRange { |
| 54 public: |
| 55 LocationRange() {} |
| 56 LocationRange(const Location& begin, const Location& end) |
| 57 : begin_(begin), |
| 58 end_(end) { |
| 59 DCHECK(begin_.file() == end_.file()); |
| 60 } |
| 61 |
| 62 const Location& begin() const { return begin_; } |
| 63 const Location& end() const { return end_; } |
| 64 |
| 65 LocationRange Union(const LocationRange& other) const { |
| 66 DCHECK(begin_.file() == other.begin_.file()); |
| 67 return LocationRange( |
| 68 begin_ < other.begin_ ? begin_ : other.begin_, |
| 69 end_ < other.end_ ? other.end_ : end_); |
| 70 } |
| 71 |
| 72 private: |
| 73 Location begin_; |
| 74 Location end_; |
| 75 }; |
| 76 |
| 77 #endif // TOOLS_GN_LOCATION_H_ |
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