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// Copyright 2014 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 "base/files/file_util.h"
#include "chrome/browser/extensions/api/image_writer_private/destroy_partitions_operation.h"
#include "chrome/browser/extensions/api/image_writer_private/error_messages.h"
#include "content/public/browser/browser_thread.h"
namespace extensions {
namespace image_writer {
// Number of bytes for the maximum partition table size. GUID partition tables
// reside in the second sector of the disk. Disks can have up to 4k sectors.
// See http://crbug.com/328246 for more information.
const int kPartitionTableSize = 2 * 4096;
DestroyPartitionsOperation::DestroyPartitionsOperation(
base::WeakPtr<OperationManager> manager,
const ExtensionId& extension_id,
const std::string& storage_unit_id)
: Operation(manager, extension_id, storage_unit_id) {}
DestroyPartitionsOperation::~DestroyPartitionsOperation() {}
void DestroyPartitionsOperation::StartImpl() {
if (!base::CreateTemporaryFileInDir(temp_dir_.path(), &image_path_)) {
Error(error::kTempFileError);
return;
}
scoped_ptr<char[]> buffer(new char[kPartitionTableSize]);
memset(buffer.get(), 0, kPartitionTableSize);
if (base::WriteFile(image_path_, buffer.get(), kPartitionTableSize) !=
kPartitionTableSize) {
Error(error::kTempFileError);
return;
}
content::BrowserThread::PostTask(
content::BrowserThread::FILE,
FROM_HERE,
base::Bind(&DestroyPartitionsOperation::Write,
this,
base::Bind(&DestroyPartitionsOperation::Finish, this)));
}
} // namespace image_writer
} // namespace extensions
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