internal RiffList(Stream target, String listId, String chunkId) // write mode
{
_baseChunk = new RiffChunk(null, target, chunkId);
if (listId.Length != 4)
{
throw new ArgumentException("listID must be 4 characters in length");
}
_listId = listId;
_baseChunk.WriteByte((byte)_listId[0]);
_baseChunk.WriteByte((byte)_listId[1]);
_baseChunk.WriteByte((byte)_listId[2]);
_baseChunk.WriteByte((byte)_listId[3]);
}
internal RiffList(RiffChunk chunk, string expectedChunkId) // read mode
{
if (chunk == null)
{
throw new ArgumentNullException("chunk");
}
_baseChunk = chunk;
if (_baseChunk.ChunkId != expectedChunkId)
{
throw new ArgumentException(string.Format(CultureInfo.InvariantCulture,
"chunk must be a {0} chunk", expectedChunkId));
}
byte[] b = _baseChunk.ReadBytes(4);
_listId = new string(new[] { (char)b[0], (char)b[1], (char)b[2], (char)b[3] });
_chunks = Descendants();
}