[petsc-users] Storing an array in a PetscBag

[Barry Smith]

   We have always thought about bags as containing only very small, fixed amounts of data so no there is no mechanism to put in variable sized arrays. I hesitate to say we should add all that support and make it the bag such a complicated object.

   Barry


On Sep 10, 2010, at 11:27 AM, Blaise Bourdin wrote:

> Hi,
> 
> Is there an easy way to use PetscBag to manage arrays of user data?
> optimally, I would like to something like
> typedef struct {
> 	PetscInt  n;
> 	PetscReal *values;
> } MyParameters;
> MyParameters   *params
> 
> and be able to register "values" in the bag so that I can specify its values as
> -n 3 -values 1.,2.,3. or -n 2 -values 1.,2.
> 
> Right now, I can see how I can get n prior to creating the bag and register params->values[0] to params->values[n-1] so that the command line could become -n 3 -values0 1 -values1 2 -values2 3 or -n 2 -values0 1 -values1 2
> 
> Would that require adding PetscBagRegisterXXXArray function or is it feasible in the current implementation?
> 
> Blaise 
> 
> -- 
> Department of Mathematics and Center for Computation & Technology
> Louisiana State University, Baton Rouge, LA 70803, USA
> Tel. +1 (225) 578 1612, Fax  +1 (225) 578 4276 http://www.math.lsu.edu/~bourdin
> 
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