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// 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;
static_assert(StringOrdinal::kZeroDigit == 'a',
"StringOrdinal has incorrect zero digit");
static_assert(StringOrdinal::kOneDigit == 'b',
"StringOrdinal has incorrect one digit");
static_assert(StringOrdinal::kMidDigit == 'n',
"StringOrdinal has incorrect mid digit");
static_assert(StringOrdinal::kMaxDigit == 'z',
"StringOrdinal has incorrect max digit");
static_assert(StringOrdinal::kMidDigitValue == 13,
"StringOrdinal has incorrect mid digit value");
static_assert(StringOrdinal::kMaxDigitValue == 25,
"StringOrdinal has incorrect max digit value");
static_assert(StringOrdinal::kRadix == 26,
"StringOrdinal has incorrect radix");
} // namespace syncer
#endif // SYNC_API_STRING_ORDINAL_H_
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