| // Copyright (c) 2011 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. |
| |
| #include "ui/gfx/range/range.h" |
| |
| #include <stddef.h> |
| |
| #include <limits> |
| |
| #include "base/check_op.h" |
| |
| namespace gfx { |
| |
| Range::Range(const NSRange& range) { |
| *this = range; |
| } |
| |
| Range& Range::operator=(const NSRange& range) { |
| if (range.location == NSNotFound) { |
| DCHECK_EQ(0U, range.length); |
| *this = InvalidRange(); |
| } else { |
| set_start(range.location); |
| // Don't overflow |end_|. |
| DCHECK_LE(range.length, std::numeric_limits<size_t>::max() - start()); |
| set_end(start() + range.length); |
| } |
| return *this; |
| } |
| |
| NSRange Range::ToNSRange() const { |
| if (!IsValid()) |
| return NSMakeRange(NSNotFound, 0); |
| return NSMakeRange(GetMin(), length()); |
| } |
| |
| } // namespace gfx |