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(*
Title: Standard Basis Library: Primitive IO Signature
Author: David Matthews
Copyright David Matthews 1999, 2005
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*)
(* G&R 2004 done. *)
signature PRIM_IO =
sig
type elem
type vector
type vector_slice
type array
type array_slice
eqtype pos
val compare : pos * pos -> General.order
datatype reader
= RD of {
name : string,
chunkSize : int,
readVec : (int -> vector) Option.option,
readArr : (array_slice -> int) Option.option,
readVecNB : (int -> vector Option.option) Option.option,
readArrNB : (array_slice -> int Option.option) Option.option,
block : (unit -> unit) Option.option,
canInput : (unit -> bool) Option.option,
avail : unit -> int Option.option,
getPos : (unit -> pos) Option.option,
setPos : (pos -> unit) Option.option,
endPos : (unit -> pos) Option.option,
verifyPos : (unit -> pos) Option.option,
close : unit -> unit,
ioDesc : OS.IO.iodesc Option.option
}
datatype writer = WR of {
name : string,
chunkSize : int,
writeVec : (vector_slice -> int) Option.option,
writeArr : (array_slice -> int) Option.option,
writeVecNB : (vector_slice -> int Option.option) Option.option,
writeArrNB : (array_slice -> int Option.option) Option.option,
block : (unit -> unit) Option.option,
canOutput : (unit -> bool) Option.option,
getPos : (unit -> pos) Option.option,
setPos : (pos -> unit) Option.option,
endPos : (unit -> pos) Option.option,
verifyPos : (unit -> pos) Option.option,
close : unit -> unit,
ioDesc : OS.IO.iodesc Option.option
}
val openVector: vector -> reader
val nullRd: unit -> reader
val nullWr: unit -> writer
val augmentReader : reader -> reader
val augmentWriter : writer -> writer
end;
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