15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef SYNC_API_STRING_ORDINAL_H_ 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define SYNC_API_STRING_ORDINAL_H_ 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/basictypes.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "sync/internal_api/public/base/ordinal.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace syncer { 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A StringOrdinal is an Ordinal with range 'a'-'z' for printability 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// of its internal byte string representation. (Think of 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// StringOrdinal as being short for PrintableStringOrdinal.) It 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// should be used for data types that want to maintain one or more 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// orderings for nodes. 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Since StringOrdinals contain only printable characters, it is safe 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// to store as a string in a protobuf. 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)struct StringOrdinalTraits { 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const uint8 kZeroDigit = 'a'; 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const uint8 kMaxDigit = 'z'; 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) static const size_t kMinLength = 1; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)typedef Ordinal<StringOrdinalTraits> StringOrdinal; 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)COMPILE_ASSERT(StringOrdinal::kZeroDigit == 'a', 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StringOrdinalHasCorrectZeroDigit); 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)COMPILE_ASSERT(StringOrdinal::kOneDigit == 'b', 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StringOrdinalHasCorrectOneDigit); 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)COMPILE_ASSERT(StringOrdinal::kMidDigit == 'n', 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StringOrdinalHasCorrectMidDigit); 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)COMPILE_ASSERT(StringOrdinal::kMaxDigit == 'z', 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StringOrdinalHasCorrectMaxDigit); 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)COMPILE_ASSERT(StringOrdinal::kMidDigitValue == 13, 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StringOrdinalHasCorrectMidDigitValue); 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)COMPILE_ASSERT(StringOrdinal::kMaxDigitValue == 25, 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StringOrdinalHasCorrectMaxDigitValue); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)COMPILE_ASSERT(StringOrdinal::kRadix == 26, 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) StringOrdinalHasCorrectRadix); 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace syncer 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // SYNC_API_STRING_ORDINAL_H_ 48