1 // Copyright (c) 2011 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 "ui/gfx/range/range.h" 6 7 #include <stddef.h> 8 9 #include <limits> 10 11 #include "base/logging.h" 12 13 namespace gfx { 14 15 Range::Range(const NSRange& range) { 16 *this = range; 17 } 18 19 Range& Range::operator=(const NSRange& range) { 20 if (range.location == NSNotFound) { 21 DCHECK_EQ(0U, range.length); 22 *this = InvalidRange(); 23 } else { 24 set_start(range.location); 25 // Don't overflow |end_|. 26 DCHECK_LE(range.length, std::numeric_limits<size_t>::max() - start()); 27 set_end(start() + range.length); 28 } 29 return *this; 30 } 31 32 NSRange Range::ToNSRange() const { 33 if (!IsValid()) 34 return NSMakeRange(NSNotFound, 0); 35 return NSMakeRange(GetMin(), length()); 36 } 37 38 } // namespace gfx 39
