The Tor Browser / file comparison
comparison: mfbt/Range.h
mfbt/Range.h
- branch
- TOR_BUG_3246
- changeset 4
- fc2d59ddac77
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| -1:000000000000 | 0:41bc24cebccb |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef mozilla_Range_h | |
| 8 #define mozilla_Range_h | |
| 9 | |
| 10 #include "mozilla/NullPtr.h" | |
| 11 #include "mozilla/RangedPtr.h" | |
| 12 | |
| 13 #include <stddef.h> | |
| 14 | |
| 15 namespace mozilla { | |
| 16 | |
| 17 // Range<T> is a tuple containing a pointer and a length. | |
| 18 template <typename T> | |
| 19 class Range | |
| 20 { | |
| 21 RangedPtr<T> mStart; | |
| 22 RangedPtr<T> mEnd; | |
| 23 | |
| 24 typedef void (Range::* ConvertibleToBool)(); | |
| 25 void nonNull() {} | |
| 26 | |
| 27 public: | |
| 28 Range() : mStart(nullptr, 0), mEnd(nullptr, 0) {} | |
| 29 Range(T* p, size_t len) | |
| 30 : mStart(p, p, p + len), | |
| 31 mEnd(p + len, p, p + len) | |
| 32 {} | |
| 33 | |
| 34 RangedPtr<T> start() const { return mStart; } | |
| 35 RangedPtr<T> end() const { return mEnd; } | |
| 36 size_t length() const { return mEnd - mStart; } | |
| 37 | |
| 38 T& operator[](size_t offset) { | |
| 39 return mStart[offset]; | |
| 40 } | |
| 41 | |
| 42 const T& operator[](size_t offset) const { | |
| 43 return mStart[offset]; | |
| 44 } | |
| 45 | |
| 46 operator ConvertibleToBool() const { return mStart ? &Range::nonNull : 0; } | |
| 47 }; | |
| 48 | |
| 49 } // namespace mozilla | |
| 50 | |
| 51 #endif /* mozilla_Range_h */ |
