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|
type bencode = Codec.Bencode.t
module Bencode = Codec.Bencode
module type S = sig
type t
val equal : t -> t -> bool
val to_bencode : t -> bencode
val of_bencode : bencode -> (t, Condition.condition) result
val to_blob : t -> Representation.blob
val of_blob : Representation.blob -> (t, Condition.condition) result
val to_bytes : t -> bytes
val of_bytes : bytes -> (t, Condition.condition) result
end
module type OBJECT = S
module Field = struct
let string value = Bencode.String value
let address address = Bencode.String (Hash.to_raw_string address)
let require_string key data =
Codec.Bencode.field key data |> Utilities.Result.fmap Codec.Bencode.as_string
let require_address ~malformed key data =
let open Utilities.Result in
let* raw = require_string key data in
if String.length raw = Hash.size then Ok (Hash.of_raw_string raw)
else Error (malformed (String.length raw))
end
module Codec = struct
module type BODY = sig
type t
val tag : char
val malformed : unit -> Condition.condition
val equal : t -> t -> bool
val fields : t -> (string * bencode) list
val of_fields : bencode -> (t, Condition.condition) result
end
module Make (B : BODY) = struct
type t = B.t
let equal = B.equal
let to_bencode object_ = Bencode.Tagged (B.tag, Bencode.Dict (B.fields object_))
let of_bencode = function
| Bencode.Tagged (tag, (Bencode.Dict _ as data)) when Char.equal tag B.tag ->
B.of_fields data
| _ -> Error (B.malformed ())
let to_blob object_ = to_bencode object_ |> Bencode.to_blob
let of_blob blob = Bencode.of_blob blob |> Utilities.Result.fmap of_bencode
let to_bytes object_ = to_blob object_ |> Representation.bytes_of_blob
let of_bytes bytes = Bencode.of_bytes bytes |> Utilities.Result.fmap of_bencode
end
end
|
