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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.
#include "content/common/indexed_db/indexed_db_key.h"
#include "base/logging.h"
#include "third_party/WebKit/public/platform/WebString.h"
#include "third_party/WebKit/public/platform/WebVector.h"
namespace content {
using WebKit::WebIDBKey;
using WebKit::WebVector;
namespace {
size_t CalculateKeySize(const WebIDBKey& key);
template <typename T> static size_t CalculateSize(const T& keys) {
size_t size(0);
for (size_t i = 0; i < keys.size(); ++i) {
size += CalculateKeySize(keys[i]);
}
return size;
}
size_t CalculateKeySize(const WebIDBKey& key) {
switch (key.type()) {
case WebIDBKey::ArrayType:
return CalculateSize(key.array());
case WebIDBKey::StringType:
return key.string().length() * sizeof(string16::value_type);
case WebIDBKey::DateType:
case WebIDBKey::NumberType:
return sizeof(double);
default:
return 0;
}
NOTREACHED();
return 0;
}
template <typename T>
static IndexedDBKey::KeyArray
CopyKeyArray(const T& array) {
IndexedDBKey::KeyArray result;
result.reserve(array.size());
for (size_t i = 0; i < array.size(); ++i) {
result.push_back(IndexedDBKey(array[i]));
}
return result;
}
static IndexedDBKey::KeyArray CopyKeyArray(const WebIDBKey& other) {
IndexedDBKey::KeyArray result;
if (other.type() == WebIDBKey::ArrayType) {
result = CopyKeyArray(other.array());
}
return result;
}
} // namespace
IndexedDBKey::IndexedDBKey()
: type_(WebIDBKey::NullType),
date_(0),
number_(0),
size_estimate_(kOverheadSize) {}
IndexedDBKey::IndexedDBKey(WebIDBKey::Type type)
: type_(type), date_(0), number_(0), size_estimate_(kOverheadSize) {
DCHECK(type == WebIDBKey::NullType || type == WebIDBKey::InvalidType);
}
IndexedDBKey::IndexedDBKey(double number, WebIDBKey::Type type)
: type_(type),
date_(number),
number_(number),
size_estimate_(kOverheadSize + sizeof(double)) {
DCHECK(type == WebIDBKey::NumberType || type == WebIDBKey::DateType);
}
IndexedDBKey::IndexedDBKey(const KeyArray& keys)
: type_(WebIDBKey::ArrayType),
array_(CopyKeyArray(keys)),
date_(0),
number_(0),
size_estimate_(kOverheadSize + CalculateSize(keys)) {}
IndexedDBKey::IndexedDBKey(const WebIDBKey& key)
: type_(key.type()),
array_(CopyKeyArray(key)),
string_(key.type() == WebIDBKey::StringType
? static_cast<string16>(key.string())
: string16()),
date_(key.type() == WebIDBKey::DateType ? key.date() : 0),
number_(key.type() == WebIDBKey::NumberType ? key.number() : 0),
size_estimate_(kOverheadSize + CalculateKeySize(key)) {}
IndexedDBKey::IndexedDBKey(const string16& key)
: type_(WebIDBKey::StringType), string_(key) {}
IndexedDBKey::~IndexedDBKey() {}
int IndexedDBKey::Compare(const IndexedDBKey& other) const {
if (type_ != other.type_)
return type_ > other.type_ ? -1 : 1;
switch (type_) {
case WebIDBKey::ArrayType:
for (size_t i = 0; i < array_.size() && i < other.array_.size(); ++i) {
if (int result = array_[i].Compare(other.array_[i]))
return result;
}
if (array_.size() < other.array_.size())
return -1;
if (array_.size() > other.array_.size())
return 1;
return 0;
case WebIDBKey::StringType:
return -other.string_.compare(string_);
case WebIDBKey::DateType:
case WebIDBKey::NumberType:
return (number_ < other.number_) ? -1 : (number_ > other.number_) ? 1 : 0;
case WebIDBKey::InvalidType:
case WebIDBKey::NullType:
default:
// This is a placeholder for WebKit::WebIDBKey::MinType
NOTREACHED();
return 0;
}
}
bool IndexedDBKey::IsLessThan(const IndexedDBKey& other) const {
return Compare(other) < 0;
}
bool IndexedDBKey::IsEqual(const IndexedDBKey& other) const {
return !Compare(other);
}
IndexedDBKey::operator WebIDBKey() const {
switch (type_) {
case WebIDBKey::ArrayType:
return WebIDBKey::createArray(array_);
case WebIDBKey::StringType:
return WebIDBKey::createString(string_);
case WebIDBKey::DateType:
return WebIDBKey::createDate(date_);
case WebIDBKey::NumberType:
return WebIDBKey::createNumber(number_);
case WebIDBKey::InvalidType:
return WebIDBKey::createInvalid();
case WebIDBKey::NullType:
return WebIDBKey::createNull();
default:
// This is a placeholder for WebKit::WebIDBKey::MinType
NOTREACHED();
return WebIDBKey::createInvalid();
}
}
} // namespace content
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