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(** File Attachments *)
type attachment =
{name : string;
pagenumber : int;
data : unit -> Pdfio.bytes}
(** Remove characters which might not make good filenames from a UTF8 string. *)
val remove_unsafe_characters : string -> string
(** [attach_file keepversion topage pdf filename] attaches the file in
[filename] to the pdf, optionally to a page (rather than document-level).
If keepversion is true, the PDF version number won't be altered. *)
val attach_file : ?memory:Pdfio.bytes -> bool -> int option -> Pdf.t -> string -> Pdf.t
(** Remove attached files. *)
val remove_attached_files : Pdf.t -> Pdf.t
(** List attached files. Attachment name and page number. Page 0 is document level. *)
val list_attached_files : Pdf.t -> attachment list
(** Dump attached files to a given directory. *)
val dump_attached_files : Pdf.t -> string -> unit
(** Total size in bytes of all attached files. *)
val size_attached_files : Pdf.t -> int
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