Module Offsetmap_bitwise_sig

module Offsetmap_bitwise_sig: sig .. end

Signature for Offsetmap_bitwise module, that implement efficient maps from intervals to values.

Values are simpler than those of the Offsetmap_sig module: given a value v bound to an interval i, all sub-intervals of i are implicitly also bound to v. If you need e.g. to extract the k-th bit of the interval to retrieve a more precise value, you must use the Offsetmap module instead.

type v

Type of the values stored in the offsetmap

include Datatype.S

Datatype for the offsetmap

type intervals

Pretty-printing

val pretty : t Pretty_utils.formatter

val pretty_generic : ?typ:Cil_types.typ ->
       ?pretty_v:(Stdlib.Format.formatter -> v -> unit) ->
       ?skip_v:(v -> bool) ->
       ?sep:string -> unit -> Stdlib.Format.formatter -> t -> unit

val pretty_debug : t Pretty_utils.formatter

Join and inclusion testing

val join : t -> t -> t

val is_included : t -> t -> bool

Finding values

val find : Int_Intervals_sig.itv -> t -> v

val find_iset : validity:Base.validity ->
       intervals -> t -> v

Adding values

val add_binding_intervals : validity:Base.validity ->
       exact:bool ->
       intervals ->
       v -> t -> t Lattice_bounds.or_bottom

val add_binding_ival : validity:Base.validity ->
       exact:bool ->
       Ival.t ->
       size:Int_Base.t -> v -> t -> t Lattice_bounds.or_bottom

Creating an offsetmap

val create : size:Integer.t -> v -> t

size must be strictly greater than zero.

val empty : t

offsetmap containing no interval.

val size_from_validity : Base.validity -> Integer.t Lattice_bounds.or_bottom

size_from_validity v returns the size to be used when creating a new offsetmap for a base with validity v. This is a convention that should be shared by all modules that create offsetmaps. Returns `Bottom iff v is Invalid.

Since Aluminium-20160501

Iterators

val map : (v -> v) -> t -> t

type map2_decide =

`\|`	`ReturnLeft`
`\|`	`ReturnRight`
`\|`	`ReturnConstant of v`
`\|`	`Recurse`	`(*`	See the documentation of type `Offsetmap_sig.map2_decide`	`*)`

val map2 : Hptmap_sig.cache_type ->
       (t -> t -> map2_decide) ->
       (v ->
        v -> v) ->
       t -> t -> t

See the documentation of function Offsetmap_sig.map2_on_values.

val fold : (intervals -> v -> 'a -> 'a) ->
       t -> 'a -> 'a

val fold_fuse_same : (intervals -> v -> 'a -> 'a) ->
       t -> 'a -> 'a

Same behavior as fold, except if two disjoint intervals r1 and r2 are mapped to the same value and boolean. In this case, fold will call its argument f on r1, then on r2. fold_fuse_same will call it directly on r1 U r2, where U is the join on sets of intervals.

val fold_itv : ?direction:[ `LTR | `RTL ] ->
       entire:bool ->
       (Int_Intervals_sig.itv -> v -> 'a -> 'a) ->
       Int_Intervals_sig.itv -> t -> 'a -> 'a

See documentation of Offsetmap_sig.fold_between.

val fold_join_itvs : cache:Hptmap_sig.cache_type ->
       (Integer.t -> Integer.t -> v -> 'a) ->
       ('a -> 'a -> 'a) -> 'a -> intervals -> t -> 'a

fold_join f join vempty itvs m is an implementation of fold that restricts itself to the intervals in itvs. Unlike in fold (where the equivalent of f operates on an accumulator), f returns a value on each sub-interval independently. The results are joined using joined. vempty is the value that must be returned on Int_Intervals.bottom. This function uses a cache internally. Hence, it must be partially applied to its first three arguments. If you do not need a cache, use fold instead.

Shape

val is_single_interval : t -> bool

is_single_interval o is true if the offsetmap o contains a single binding.

val single_interval_value : t -> v option

single_interval_value o returns Some v if o contains a single interval, to which v is bound, and None otherwise.

val is_same_value : t -> v -> bool

is_same_value o v is true if the offsetmap o contains a single binding to v, or is the empty offsetmap.

Misc

val clear_caches : unit -> unit

Clear the caches local to this module. Beware that they are not project-aware, and that you must call them at every project switch.