On Thu, 21 Jul 2005, Mario Mendez wrote:
Thank you! Another question then:
How can I insert dimensions in the middle? E.G: convert [B=2,E=8] Dim= N in [B=2,G=8] Dim = N + 2 after inserting two "universe" dimensions between the original B and E. I already know how to add at the beginning/end, but no idea about how to use the library for this particular purpose.
I am not completely clear. If you mean that you want to insert two dimensions between the "B" and "C" dimensions, and rename the "E" dimension as "G", then here is a snippet of Prolog that does this.
T = c, ppl_new_Polyhedron_from_space_dimension(T, 5, universe, P), ppl_Polyhedron_add_constraints(P, [B = 2, E = 8]), ppl_Polyhedron_add_space_dimensions_and_embed(P, 2), ppl_Polyhedron_map_space_dimensions(P, [A-A, B-B, C-E, D-F, E-G, F-C, G-D]), ppl_new_Polyhedron_from_space_dimension(T, 7, universe, Q), ppl_Polyhedron_add_constraints(Q, [B = 2, G = 8]), ppl_Polyhedron_equals_Polyhedron(P, Q).
Basically, I have added the 2 new dimensions to the end and then use the "map_space_dimensions" predicate to rearrange the order of the dimensions.
PS: I'm working in a abstract domain based on your library for finding linear invariants....
Best wishes, Pat