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64 lines
2.3 KiB
OCaml
64 lines
2.3 KiB
OCaml
(*
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Copyright (c) 2013, Simon Cruanes
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer. Redistributions in binary
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form must reproduce the above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other materials provided with
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the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*)
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(** {1 Hash combinators}
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Combination of hashes based on the
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SDBM simple hash (see for instance
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{{:http://www.cse.yorku.ca/~oz/hash.html} this page})
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*)
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type t = int
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type 'a hash_fun = 'a -> t
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val combine : t -> t -> t
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(** Combine two hashes. Non-commutative. *)
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val (<<>>) : t -> t -> t
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(** Infix version of {!combine} *)
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val hash_int : int -> t
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val hash_int2 : int -> int -> t
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val hash_int3 : int -> int -> int -> t
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val hash_int4 : int -> int -> int -> int -> t
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val hash_string : string -> t
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val hash_list : 'a hash_fun -> t -> 'a list hash_fun
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(** Hash a list. Each element is hashed using [f]. *)
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val hash_array : 'a hash_fun -> t -> 'a array hash_fun
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val hash_pair : 'a hash_fun -> 'b hash_fun -> ('a * 'b) hash_fun
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val hash_triple : 'a hash_fun -> 'b hash_fun -> 'c hash_fun -> ('a * 'b * 'c) hash_fun
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type 'a sequence = ('a -> unit) -> unit
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type 'a gen = unit -> 'a option
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type 'a klist = unit -> [`Nil | `Cons of 'a * 'a klist]
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val hash_seq : 'a hash_fun -> t -> 'a sequence hash_fun
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val hash_gen : 'a hash_fun -> t -> 'a gen hash_fun
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val hash_klist : 'a hash_fun -> t -> 'a klist hash_fun
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