40 lines
964 B
OCaml
40 lines
964 B
OCaml
type t
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= DelicatedFile of {
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fid : Bytes.t;
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aid : Bytes.t option;
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files : t list;
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}
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| ElementaryFile of {
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fid : Bytes.t;
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sid : Bytes.t;
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data : Bytes.t;
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}
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let find_by_fid fid files =
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let rec eachfile = fun file ->
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match file with
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| DelicatedFile df -> if Bytes.equal fid df.fid
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then true
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else List.exists eachfile df.files
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| ElementaryFile ef -> Bytes.equal fid ef.fid
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in
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List.find_opt eachfile files
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let find_by_aid aid files =
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let rec eachfile = fun file ->
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match file with
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| ElementaryFile _ -> false
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| DelicatedFile df -> match df.aid with
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| Some id -> Bytes.equal aid id
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| None -> List.exists eachfile df.files
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in
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List.find_opt eachfile files
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let find_by_sid sid files =
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let rec eachfile = fun file ->
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match file with
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| DelicatedFile df -> List.exists eachfile df.files
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| ElementaryFile ef -> Bytes.equal sid ef.sid
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in
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List.find_opt eachfile files
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