public STAT_CHUNK GetChunk()
{
// Get the managed chunk
ManagedChunk managedChunk = _implementation.GetChunk();
if (managedChunk == null)
{
// End of chunks.
if (ThrowOnEndOfChunks)
{
// Throw exception.
throw new COMException(SR.Get(SRID.FilterEndOfChunks),
(int)FilterErrorCode.FILTER_E_END_OF_CHUNKS);
}
// Return STAT_CHUNK with idChunk as 0.
STAT_CHUNK chunk = new STAT_CHUNK();
chunk.idChunk = 0;
return chunk;
}
// Valid chunk. Return corresponding STAT_CHUNK.
return MarshalChunk(managedChunk);
}
internal static STAT_CHUNK MarshalChunk(ManagedChunk chunk)
{
STAT_CHUNK native = new STAT_CHUNK();
native.idChunk = chunk.ID;
Invariant.Assert(chunk.BreakType >= CHUNK_BREAKTYPE.CHUNK_NO_BREAK && chunk.BreakType <= CHUNK_BREAKTYPE.CHUNK_EOC);
native.breakType = chunk.BreakType;
Invariant.Assert(
chunk.Flags >= 0
&&
chunk.Flags <= (CHUNKSTATE.CHUNK_TEXT | CHUNKSTATE.CHUNK_VALUE | CHUNKSTATE.CHUNK_FILTER_OWNED_VALUE));
native.flags = chunk.Flags;
native.locale = chunk.Locale;
native.idChunkSource = chunk.ChunkSource;
native.cwcStartSource = chunk.StartSource;
native.cwcLenSource = chunk.LenSource;
MarshalFullPropSpec(chunk.Attribute, ref native.attribute);
return native;
}