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import Mixtbl from its repository, into misc/

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Simon Cruanes 2014-11-19 17:16:57 +01:00
parent a47bd108ec
commit cad578840e
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2
_oasis
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@ -81,7 +81,7 @@ Library "containers_misc"
PHashtbl, SkipList, SplayTree, SplayMap, Univ,
Bij, PiCalculus, RAL, UnionFind, SmallSet, AbsSet, CSM,
TTree, PrintBox, HGraph, Automaton, Conv, Bidir, Iteratee,
BTree, Ty, Cause, AVL, ParseReact
BTree, Ty, Cause, AVL, ParseReact, Mixtbl
BuildDepends: unix,containers
FindlibName: misc
FindlibParent: containers

91
misc/mixtbl.ml Normal file
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@ -0,0 +1,91 @@
(*
copyright (c) 2013-2014, simon cruanes
all rights reserved.
redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer. redistributions in binary
form must reproduce the above copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other materials provided with
the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*)
(** {1 Hash Table with Heterogeneous Keys} *)
type 'a t = ('a, (unit -> unit)) Hashtbl.t
type ('a, 'b) injection = {
getter : 'a t -> 'a -> 'b option;
setter : 'a t -> 'a -> 'b -> unit;
}
let create n = Hashtbl.create n
let access () =
let r = ref None in
let getter tbl k =
r := None; (* reset state in case last operation was not a get *)
try
(Hashtbl.find tbl k) ();
let result = !r in
r := None; (* clean up here in order to avoid memory leak *)
result
with Not_found -> None
in
let setter tbl k v =
let v_opt = Some v in
Hashtbl.replace tbl k (fun () -> r := v_opt)
in
{ getter; setter; }
let get ~inj tbl x = inj.getter tbl x
let set ~inj tbl x y = inj.setter tbl x y
let length tbl = Hashtbl.length tbl
let clear tbl = Hashtbl.clear tbl
let remove tbl x = Hashtbl.remove tbl x
let copy tbl = Hashtbl.copy tbl
let mem ~inj tbl x =
match inj.getter tbl x with
| None -> false
| Some _ -> true
let find ~inj tbl x =
match inj.getter tbl x with
| None -> raise Not_found
| Some y -> y
let iter_keys tbl f =
Hashtbl.iter (fun x _ -> f x) tbl
let fold_keys tbl acc f =
Hashtbl.fold (fun x _ acc -> f acc x) tbl acc
let keys tbl =
Hashtbl.fold (fun x _ acc -> x :: acc) tbl []
let bindings ~inj tbl =
fold_keys tbl []
(fun acc k ->
match inj.getter tbl k with
| None -> acc
| Some v -> (k, v) :: acc)

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misc/mixtbl.mli Normal file
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@ -0,0 +1,113 @@
(*
copyright (c) 2013-2014, simon cruanes
all rights reserved.
redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
redistributions of source code must retain the above copyright notice, this
list of conditions and the following disclaimer. redistributions in binary
form must reproduce the above copyright notice, this list of conditions and the
following disclaimer in the documentation and/or other materials provided with
the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*)
(** {1 Hash Table with Heterogeneous Keys}
From https://github.com/mjambon/mixtbl , thanks to him.
Example:
{[
let inj_int = Mixtbl.access () ;;
let tbl = Mixtbl.create 10 ;;
OUnit.assert_equal None (Mixtbl.get ~inj:inj_int tbl "a");;
Mixtbl.set inj_int tbl "a" 1;;
OUnit.assert_equal (Some 1) (Mixtbl.get ~inj:inj_int tbl "a");;
let inj_string = Mixtbl.access () ;;
Mixtbl.set inj_string tbl "b" "Hello";
OUnit.assert_equal (Some "Hello") (Mixtbl.get inj_string tbl "b");;
OUnit.assert_equal None (Mixtbl.get inj_string tbl "a");;
OUnit.assert_equal (Some 1) (Mixtbl.get inj_int tbl "a");;
Mixtbl.set inj_string tbl "a" "Bye";;
OUnit.assert_equal None (Mixtbl.get inj_int tbl "a");;
OUnit.assert_equal (Some "Bye") (Mixtbl.get inj_string tbl "a");;
]}
@since NEXT_RELEASE *)
type 'a t
(** A hash table containing values of different types.
The type parameter ['a] represents the type of the keys. *)
type ('a, 'b) injection
(** An accessor for values of type 'b in the table. Values put
in the table using an injection can only be retrieved using this
very same injection. *)
val create : int -> 'a t
(** [create n] creates a hash table of initial size [n]. *)
val access : unit -> ('a, 'b) injection
(** Return a value that works for a given type of values. This function is
normally called once for each type of value. Several injections may be
created for the same type, but a value set with a given setter can only be
retrieved with the matching getter. The same injection can be reused
across multiple tables (although not in a thread-safe way). *)
val get : inj:('a, 'b) injection -> 'a t -> 'a -> 'b option
(** Get the value corresponding to this key, if it exists and
belongs to the same injection *)
val set : inj:('a, 'b) injection -> 'a t -> 'a -> 'b -> unit
(** Bind the key to the value, using [inj] *)
val length : 'a t -> int
(** Number of bindings *)
val clear : 'a t -> unit
(** Clear content of the hashtable *)
val remove : 'a t -> 'a -> unit
(** Remove the binding for this key *)
val copy : 'a t -> 'a t
(** Copy of the table *)
val mem : inj:('a, _) injection -> 'a t -> 'a -> bool
(** Is the given key in the table, with the right type? *)
val find : inj:('a, 'b) injection -> 'a t -> 'a -> 'b
(** Find the value for the given key, which must be of the right type.
raises Not_found if either the key is not found, or if its value
doesn't belong to the right type *)
val iter_keys : 'a t -> ('a -> unit) -> unit
(** Iterate on the keys of this table *)
val fold_keys : 'a t -> 'b -> ('b -> 'a -> 'b) -> 'b
(** Fold over the keys *)
val keys : 'a t -> 'a list
(** List of the keys *)
val bindings : inj:('a, 'b) injection -> 'a t -> ('a * 'b) list
(** All the bindings that come from the corresponding injection *)

1
tests/run_tests.ml
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@ -21,6 +21,7 @@ let suite =
Test_heap.suite;
Test_graph.suite;
Test_univ.suite;
Test_mixtbl.suite;
]
let props =

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tests/test_mixtbl.ml Normal file
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@ -0,0 +1,94 @@
open OUnit
open Containers_misc
let example () =
let inj_int = Mixtbl.access () in
let tbl = Mixtbl.create 10 in
OUnit.assert_equal None (Mixtbl.get ~inj:inj_int tbl "a");
Mixtbl.set inj_int tbl "a" 1;
OUnit.assert_equal (Some 1) (Mixtbl.get ~inj:inj_int tbl "a");
let inj_string = Mixtbl.access () in
Mixtbl.set inj_string tbl "b" "Hello";
OUnit.assert_equal (Some "Hello") (Mixtbl.get inj_string tbl "b");
OUnit.assert_equal None (Mixtbl.get inj_string tbl "a");
OUnit.assert_equal (Some 1) (Mixtbl.get inj_int tbl "a");
Mixtbl.set inj_string tbl "a" "Bye";
OUnit.assert_equal None (Mixtbl.get inj_int tbl "a");
OUnit.assert_equal (Some "Bye") (Mixtbl.get inj_string tbl "a");
()
let test_length () =
let inj_int = Mixtbl.access () in
let tbl = Mixtbl.create 5 in
Mixtbl.set ~inj:inj_int tbl "foo" 1;
Mixtbl.set ~inj:inj_int tbl "bar" 2;
OUnit.assert_equal 2 (Mixtbl.length tbl);
OUnit.assert_equal 2 (Mixtbl.find ~inj:inj_int tbl "bar");
Mixtbl.set ~inj:inj_int tbl "foo" 42;
OUnit.assert_equal 2 (Mixtbl.length tbl);
Mixtbl.remove tbl "bar";
OUnit.assert_equal 1 (Mixtbl.length tbl);
()
let test_clear () =
let inj_int = Mixtbl.access () in
let inj_str = Mixtbl.access () in
let tbl = Mixtbl.create 5 in
Mixtbl.set ~inj:inj_int tbl "foo" 1;
Mixtbl.set ~inj:inj_int tbl "bar" 2;
Mixtbl.set ~inj:inj_str tbl "baaz" "hello";
OUnit.assert_equal 3 (Mixtbl.length tbl);
Mixtbl.clear tbl;
OUnit.assert_equal 0 (Mixtbl.length tbl);
()
let test_mem () =
let inj_int = Mixtbl.access () in
let inj_str = Mixtbl.access () in
let tbl = Mixtbl.create 5 in
Mixtbl.set ~inj:inj_int tbl "foo" 1;
Mixtbl.set ~inj:inj_int tbl "bar" 2;
Mixtbl.set ~inj:inj_str tbl "baaz" "hello";
OUnit.assert_bool "mem foo int" (Mixtbl.mem ~inj:inj_int tbl "foo");
OUnit.assert_bool "mem bar int" (Mixtbl.mem ~inj:inj_int tbl "bar");
OUnit.assert_bool "not mem baaz int" (not (Mixtbl.mem ~inj:inj_int tbl "baaz"));
OUnit.assert_bool "not mem foo str" (not (Mixtbl.mem ~inj:inj_str tbl "foo"));
OUnit.assert_bool "not mem bar str" (not (Mixtbl.mem ~inj:inj_str tbl "bar"));
OUnit.assert_bool "mem baaz str" (Mixtbl.mem ~inj:inj_str tbl "baaz");
()
let test_keys () =
let inj_int = Mixtbl.access () in
let inj_str = Mixtbl.access () in
let tbl = Mixtbl.create 5 in
Mixtbl.set ~inj:inj_int tbl "foo" 1;
Mixtbl.set ~inj:inj_int tbl "bar" 2;
Mixtbl.set ~inj:inj_str tbl "baaz" "hello";
let l = Mixtbl.keys tbl in
OUnit.assert_equal ["baaz"; "bar"; "foo"] (List.sort compare l);
()
let test_bindings () =
let inj_int = Mixtbl.access () in
let inj_str = Mixtbl.access () in
let tbl = Mixtbl.create 5 in
Mixtbl.set ~inj:inj_int tbl "foo" 1;
Mixtbl.set ~inj:inj_int tbl "bar" 2;
Mixtbl.set ~inj:inj_str tbl "baaz" "hello";
Mixtbl.set ~inj:inj_str tbl "str" "rts";
let l_int = Mixtbl.bindings tbl ~inj:inj_int in
OUnit.assert_equal ["bar", 2; "foo", 1] (List.sort compare l_int);
let l_str = Mixtbl.bindings tbl ~inj:inj_str in
OUnit.assert_equal ["baaz", "hello"; "str", "rts"] (List.sort compare l_str);
()
let suite =
"mixtbl" >:::
[ "example" >:: example;
"length" >:: test_length;
"clear" >:: test_clear;
"mem" >:: test_mem;
"bindings" >:: test_bindings;
]