[udf-dlm-develop] Re: udf-dlm and matrix

[Joerg-Micha J. <jm...@Or...>]

> From: Ed Santiago <es...@la...>


Excellent sleuthing.  Your summary is identical to what I figured
needed to be done.

One difference, though:

  >If you read the VIDF/PIDF, you already know a matrix is coming

Well, maybe VIDF.  I'm pretty sure that the "matrix" indicator
is nowhere in the PIDF.  

Near as I can tell, you need to read_idf( ..., _SmpId, ... ) to
figure out if it's a matrix (3).

  >Now, what about the structure? You know
  >only *after* the first read_drec, how big the matrix is going to be. Will
  >this be easy to implement in the code??

Well, not too hard, maybe.  You'll need to do a read_drec() in
the UDF_OPEN() function, or possibly in udfdlm_make_idl_struct().

The trick is going to be, what to do with the struct.  The code
in udfdlm_make_idl_struct() is going to have to do special magic
with the s_dims[] definition, and that isn't going to be pretty.

(...)