internal static void ReadPreCookies(FileStream fs, long offset, int pageSize, LinkedList <CacheFileCookie> cookieList, int capacity)
{
BinaryFormatter binaryFormatter = ExchangeBinaryFormatterFactory.CreateBinaryFormatter(null);
CacheFileCookieSerializer.SetOffsetAndPageSize(fs, binaryFormatter, offset, ref pageSize);
for (int i = 0; i < pageSize; i++)
{
long position = fs.Position;
if (position == fs.Length)
{
return;
}
CacheFileCookie cacheFileCookie = (CacheFileCookie)binaryFormatter.Deserialize(fs);
cacheFileCookie.NextCookieOffset = fs.Position;
cookieList.AddFirst(cacheFileCookie);
if (cookieList.Count > capacity)
{
cookieList.RemoveLast();
}
if (cacheFileCookie.PreCookieOffset < 0L)
{
return;
}
fs.Seek(cacheFileCookie.PreCookieOffset, SeekOrigin.Begin);
}
}
internal static void WriteCookieToFile(FileStream cookieFileStream, CacheFileCookie cookie, CacheFileCookie preCookie)
{
BinaryFormatter binaryFormatter = ExchangeBinaryFormatterFactory.CreateBinaryFormatter(null);
if (cookieFileStream.Length == 0L)
{
binaryFormatter.Serialize(cookieFileStream, 0);
}
cookie.PreCookieOffset = preCookie.CookieOffset;
cookie.CookieOffset = cookieFileStream.Position;
binaryFormatter.Serialize(cookieFileStream, cookie);
cookieFileStream.SetLength(cookieFileStream.Position);
}
internal static LinkedList <CacheFileCookie> ReadCookieList(FileStream fs, long offset, int pageSize)
{
LinkedList <CacheFileCookie> linkedList = new LinkedList <CacheFileCookie>();
BinaryFormatter binaryFormatter = ExchangeBinaryFormatterFactory.CreateBinaryFormatter(null);
CacheFileCookieSerializer.SetOffsetAndPageSize(fs, binaryFormatter, offset, ref pageSize);
for (int i = 0; i < pageSize; i++)
{
long position = fs.Position;
if (position == fs.Length)
{
break;
}
CacheFileCookie cacheFileCookie = (CacheFileCookie)binaryFormatter.Deserialize(fs);
cacheFileCookie.NextCookieOffset = fs.Position;
linkedList.AddLast(cacheFileCookie);
}
return(linkedList);
}
