1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/security/sandbox/chromium/base/strings/nullable_string16.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,46 @@
1.4 +// Copyright (c) 2010 The Chromium Authors. All rights reserved.
1.5 +// Use of this source code is governed by a BSD-style license that can be
1.6 +// found in the LICENSE file.
1.7 +
1.8 +#ifndef BASE_STRINGS_NULLABLE_STRING16_H_
1.9 +#define BASE_STRINGS_NULLABLE_STRING16_H_
1.10 +
1.11 +#include <iosfwd>
1.12 +
1.13 +#include "base/base_export.h"
1.14 +#include "base/strings/string16.h"
1.15 +
1.16 +namespace base {
1.17 +
1.18 +// This class is a simple wrapper for string16 which also contains a null
1.19 +// state. This should be used only where the difference between null and
1.20 +// empty is meaningful.
1.21 +class NullableString16 {
1.22 + public:
1.23 + NullableString16() : is_null_(true) { }
1.24 + NullableString16(const string16& string, bool is_null)
1.25 + : string_(string), is_null_(is_null) {
1.26 + }
1.27 +
1.28 + const string16& string() const { return string_; }
1.29 + bool is_null() const { return is_null_; }
1.30 +
1.31 + private:
1.32 + string16 string_;
1.33 + bool is_null_;
1.34 +};
1.35 +
1.36 +inline bool operator==(const NullableString16& a, const NullableString16& b) {
1.37 + return a.is_null() == b.is_null() && a.string() == b.string();
1.38 +}
1.39 +
1.40 +inline bool operator!=(const NullableString16& a, const NullableString16& b) {
1.41 + return !(a == b);
1.42 +}
1.43 +
1.44 +BASE_EXPORT std::ostream& operator<<(std::ostream& out,
1.45 + const NullableString16& value);
1.46 +
1.47 +} // namespace
1.48 +
1.49 +#endif // BASE_STRINGS_NULLABLE_STRING16_H_
