FileWriterBase.cpp   [plain text]

/*
 * Copyright (C) 2010 Google Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"

#if ENABLE(FILE_SYSTEM)

#include "FileWriterBase.h"

#include "AsyncFileWriter.h"
#include "Blob.h"
#include "ExceptionCode.h"
#include "FileError.h"
#include "FileException.h"
#include "ProgressEvent.h"

namespace WebCore {

FileWriterBase::~FileWriterBase()
{
}

void FileWriterBase::initialize(PassOwnPtr<AsyncFileWriter> writer, long long length)
{
    ASSERT(!m_writer);
    ASSERT(length >= 0);
    m_writer = writer;
    m_length = length;
}

FileWriterBase::FileWriterBase()
    : m_position(0)
{
}

void FileWriterBase::seekInternal(long long position)
{
    if (position > m_length)
        position = m_length;
    else if (position < 0)
        position = m_length + position;
    if (position < 0)
        position = 0;
    m_position = position;
}

} // namespace WebCore

#endif // ENABLE(FILE_SYSTEM)