NTSYSAPI NTSTATUS NTAPI RtlReserveChunk( IN USHORT CompressionFormat, IN OUT PUCHAR *CompressedBuffer, IN PUCHAR EndOfCompressedBufferPlus1, OUT PUCHAR *ChunkBuffer, IN ULONG ChunkSize ); Routine Description: This routine takes as input a compressed buffer, and reserves space for a chunk of the specified size - filling in any pattern as is necessary for a chunk of that size. On return it has updated the CompressedBuffer pointer to point to the next chunk (if there is one). Arguments: CompressionFormat - Supplies the format of the compressed data. CompressedBuffer - Supplies a pointer to the current chunk in the compressed data, and returns pointing to the next chunk EndOfCompressedBufferPlus1 - Points at first byte beyond compressed buffer ChunkBuffer - Receives a pointer to the chunk, if ChunkSize is nonzero, else undefined ChunkSize - Supplies the compressed size of the chunk to be received. Two special values are 0, and whatever the maximum uncompressed chunk size is for the routine. 0 means the chunk should be filled with a pattern that equates to all 0's. The maximum chunk size implies that the compression routine should prepare to receive all of the data in uncompressed form. Return Value: STATUS_SUCCESS - the decompression worked without a hitch. STATUS_INVALID_PARAMETER - The specified format is illegal STATUS_BAD_COMPRESSION_BUFFER - the input compressed buffer is ill-formed. STATUS_UNSUPPORTED_COMPRESSION - the specified compression format and/or engine is not support.