Previous  Up  Next

Module Ppl


module Ppl: sig .. end
Convex Polyhedra and Linear Congruences abstract domains (PPL wrapper)

This module is a wrapper around the Parma Polyhedra Library.
type loose 
type strict
Two flavors for convex polyhedra: loose or strict.

Loose polyhedra cannot have strict inequality constraints like x>0. They are algorithmically more efficient (less generators, simpler normalization). Convex polyhedra are defined by the conjunction of a set of linear constraints of the form a_0*x_0 + ... + a_n*x_n + b >= 0 or a_0*x_0 + ... + a_n*x_n + b > 0 where a_0, ..., a_n, b, c are constants and x_0, ..., x_n variables.

type grid
Linear congruences.

Linear congruences are defined by the conjunction of equality constraints modulo a rational number, of the form a_0*x_0 + ... + a_n*x_n = b mod c, where a_0, ..., a_n, b, c are constants and x_0, ..., x_n variables.

type 'a t
Type of convex polyhedra/linear congruences, where 'a is loose, strict or grid.

Abstract values which are convex polyhedra have the type loose t Apron.AbstractX.t or strict t Apron.AbstractX.t. Abstract values which are conjunction of linear congruences equalities have the type grid t Apron.AbstractX.t. Managers allocated by PPL have the type 'a t Apron.Manager.t.

val manager_alloc_loose : unit -> loose t Apron.Manager.t
Allocate a PPL manager for loose convex polyhedra.
val manager_alloc_strict : unit -> strict t Apron.Manager.t
Allocate a PPL manager for strict convex polyhedra.
val manager_alloc_grid : unit -> grid t Apron.Manager.t
Allocate a new manager for linear congruences (grids)
val manager_is_ppl : 'a Apron.Manager.t -> bool

Type conversions


val manager_is_ppl_loose : 'a Apron.Manager.t -> bool
val manager_is_ppl_strict : 'a Apron.Manager.t -> bool
val manager_is_ppl_grid : 'a Apron.Manager.t -> bool
Return true iff the argument manager is a ppl manager
val manager_of_ppl : 'a t Apron.Manager.t -> 'b Apron.Manager.t
val manager_of_ppl_loose : loose t Apron.Manager.t -> 'a Apron.Manager.t
val manager_of_ppl_strict : strict t Apron.Manager.t -> 'a Apron.Manager.t
val manager_of_ppl_grid : grid t Apron.Manager.t -> 'a Apron.Manager.t
Make a ppl manager generic
val manager_to_ppl : 'a Apron.Manager.t -> 'b t Apron.Manager.t
val manager_to_ppl_loose : 'a Apron.Manager.t -> loose t Apron.Manager.t
val manager_to_ppl_strict : 'a Apron.Manager.t -> strict t Apron.Manager.t
val manager_to_ppl_grid : 'a Apron.Manager.t -> grid t Apron.Manager.t
Instanciate the type of a ppl manager. Raises Failure if the argument manager is not a ppl manager
module Abstract0: sig .. end
module Abstract1: sig .. end

Compilation information

See Compiling and linking client programs against APRON for complete explanations. We just show examples with the file mlexample.ml.

Do not forget the -cc "g++" option: PPL is a C++ library which requires a C++ linker.

Bytecode compilation

ocamlc -cc "g++"-I $MLGMPIDL_PREFIX/lib -I $APRON_PREFIX/lib -o mlexample.byte \
  bigarray.cma gmp.cma apron.cma ppl.cma mlexample.ml





ocamlc -cc "g++" -I $MLGMPIDL_PREFIX/lib -I $APRON_PREFIX/lib -make-runtime -o myrun \
  bigarray.cma gmp.cma apron.cma ppl.cma

ocamlc -cc "g++" -I $MLGMPIDL_PREFIX/lib -I $APRON_PREFIX/lib -use-runtime myrun -o mlexample.byte \
  bigarray.cma gmp.cma apron.cma ppl.cma mlexample.ml 






Native-code compilation





ocamlopt -cc "g++" -I $MLGMPIDL_PREFIX/lib -I $APRON_PREFIX/lib -o mlexample.opt \
  bigarray.cmxa gmp.cmxa apron.cmxa ppl.cmxa mlexample.ml 






Without auto-linking feature





ocamlopt -cc "g++" -I $MLGMPIDL_PREFIX/lib -I $APRON_PREFIX/lib -noautolink -o mlexample.opt \
  bigarray.cmxa gmp.cmxa apron.cmxa ppl.cmxa mlexample.ml \
  -cclib "-L$MLGMPIDL_PREFIX/lib -L$APRON_PREFIX/lib -L$PPL_PREFIX/lib\
	  -lap_ppl_caml_debug -lap_ppl_debug -lppl -lgmpxx \
	  -lapron_caml_debug -lapron_debug \
	  -lgmp_caml -L$MPFR_PREFIX/lib -lmpfr -L$GMP_PREFIX/lib -lgmp \
	  -L$CAMLIDL_PREFIX/lib/ocaml -lcamlidl \
	  -lbigarray"