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// Copyright 2013 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 "storage/common/data_element.h"
#include <stddef.h>
#include <stdint.h>
#include <algorithm>
#include "base/strings/string_number_conversions.h"
namespace storage {
DataElement::DataElement()
: type_(TYPE_UNKNOWN),
bytes_(NULL),
offset_(0),
length_(std::numeric_limits<uint64_t>::max()) {}
DataElement::DataElement(const DataElement& other) = default;
DataElement::~DataElement() {}
void DataElement::SetToFilePathRange(
const base::FilePath& path,
uint64_t offset,
uint64_t length,
const base::Time& expected_modification_time) {
type_ = TYPE_FILE;
path_ = path;
offset_ = offset;
length_ = length;
expected_modification_time_ = expected_modification_time;
}
void DataElement::SetToBlobRange(const std::string& blob_uuid,
uint64_t offset,
uint64_t length) {
type_ = TYPE_BLOB;
blob_uuid_ = blob_uuid;
offset_ = offset;
length_ = length;
}
void DataElement::SetToFileSystemUrlRange(
const GURL& filesystem_url,
uint64_t offset,
uint64_t length,
const base::Time& expected_modification_time) {
type_ = TYPE_FILE_FILESYSTEM;
filesystem_url_ = filesystem_url;
offset_ = offset;
length_ = length;
expected_modification_time_ = expected_modification_time;
}
void DataElement::SetToDiskCacheEntryRange(uint64_t offset, uint64_t length) {
type_ = TYPE_DISK_CACHE_ENTRY;
offset_ = offset;
length_ = length;
}
void PrintTo(const DataElement& x, std::ostream* os) {
const uint64_t kMaxDataPrintLength = 40;
*os << "<DataElement>{type: ";
switch (x.type()) {
case DataElement::TYPE_BYTES: {
uint64_t length = std::min(x.length(), kMaxDataPrintLength);
*os << "TYPE_BYTES, data: ["
<< base::HexEncode(x.bytes(), static_cast<size_t>(length));
if (length < x.length()) {
*os << "<...truncated due to length...>";
}
*os << "]";
break;
}
case DataElement::TYPE_FILE:
*os << "TYPE_FILE, path: " << x.path().AsUTF8Unsafe()
<< ", expected_modification_time: " << x.expected_modification_time();
break;
case DataElement::TYPE_BLOB:
*os << "TYPE_BLOB, uuid: " << x.blob_uuid();
break;
case DataElement::TYPE_FILE_FILESYSTEM:
*os << "TYPE_FILE_FILESYSTEM, filesystem_url: " << x.filesystem_url();
break;
case DataElement::TYPE_DISK_CACHE_ENTRY:
*os << "TYPE_DISK_CACHE_ENTRY";
break;
case DataElement::TYPE_BYTES_DESCRIPTION:
*os << "TYPE_BYTES_DESCRIPTION";
break;
case DataElement::TYPE_UNKNOWN:
*os << "TYPE_UNKNOWN";
break;
}
*os << ", length: " << x.length() << ", offset: " << x.offset() << "}";
}
bool operator==(const DataElement& a, const DataElement& b) {
if (a.type() != b.type() || a.offset() != b.offset() ||
a.length() != b.length())
return false;
switch (a.type()) {
case DataElement::TYPE_BYTES:
return memcmp(a.bytes(), b.bytes(), b.length()) == 0;
case DataElement::TYPE_FILE:
return a.path() == b.path() &&
a.expected_modification_time() == b.expected_modification_time();
case DataElement::TYPE_BLOB:
return a.blob_uuid() == b.blob_uuid();
case DataElement::TYPE_FILE_FILESYSTEM:
return a.filesystem_url() == b.filesystem_url();
case DataElement::TYPE_DISK_CACHE_ENTRY:
// We compare only length and offset; we trust the entry itself was
// compared at some higher level such as in BlobDataItem.
return true;
case DataElement::TYPE_BYTES_DESCRIPTION:
return true;
case DataElement::TYPE_UNKNOWN:
NOTREACHED();
return false;
}
return false;
}
bool operator!=(const DataElement& a, const DataElement& b) {
return !(a == b);
}
} // namespace storage
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