| // Copyright (c) 2012 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. |
| |
| #ifndef SYNC_API_STRING_ORDINAL_H_ |
| #define SYNC_API_STRING_ORDINAL_H_ |
| |
| #include "base/basictypes.h" |
| #include "sync/internal_api/public/base/ordinal.h" |
| |
| namespace syncer { |
| |
| // A StringOrdinal is an Ordinal with range 'a'-'z' for printability |
| // of its internal byte string representation. (Think of |
| // StringOrdinal as being short for PrintableStringOrdinal.) It |
| // should be used for data types that want to maintain one or more |
| // orderings for nodes. |
| // |
| // Since StringOrdinals contain only printable characters, it is safe |
| // to store as a string in a protobuf. |
| |
| struct StringOrdinalTraits { |
| static const uint8 kZeroDigit = 'a'; |
| static const uint8 kMaxDigit = 'z'; |
| static const size_t kMinLength = 1; |
| }; |
| |
| typedef Ordinal<StringOrdinalTraits> StringOrdinal; |
| |
| COMPILE_ASSERT(StringOrdinal::kZeroDigit == 'a', |
| StringOrdinalHasCorrectZeroDigit); |
| COMPILE_ASSERT(StringOrdinal::kOneDigit == 'b', |
| StringOrdinalHasCorrectOneDigit); |
| COMPILE_ASSERT(StringOrdinal::kMidDigit == 'n', |
| StringOrdinalHasCorrectMidDigit); |
| COMPILE_ASSERT(StringOrdinal::kMaxDigit == 'z', |
| StringOrdinalHasCorrectMaxDigit); |
| COMPILE_ASSERT(StringOrdinal::kMidDigitValue == 13, |
| StringOrdinalHasCorrectMidDigitValue); |
| COMPILE_ASSERT(StringOrdinal::kMaxDigitValue == 25, |
| StringOrdinalHasCorrectMaxDigitValue); |
| COMPILE_ASSERT(StringOrdinal::kRadix == 26, |
| StringOrdinalHasCorrectRadix); |
| |
| } // namespace syncer |
| |
| #endif // SYNC_API_STRING_ORDINAL_H_ |