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(* RawIO.mod implement the ISO RawIO specification.
Copyright (C) 2008-2023 Free Software Foundation, Inc.
Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>.
This file is part of GNU Modula-2.
GNU Modula-2 is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Modula-2 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
General Public License for more details.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. *)
IMPLEMENTATION MODULE RawIO ;
FROM IOChan IMPORT RawWrite, RawRead, ReadResult ;
FROM IOConsts IMPORT ReadResults ;
FROM libc IMPORT printf ;
FROM FIO IMPORT FlushOutErr ;
(* Reading and writing data over specified channels using raw
operations, that is, with no conversion or interpretation.
The read result is of the type IOConsts.ReadResults.
*)
(*
Read - storage units from cid, and assigns them to successive
components of to. The read result is set to the value
allRight, wrongFormat, or endOfInput.
*)
PROCEDURE Read (cid: IOChan.ChanId; VAR to: ARRAY OF SYSTEM.LOC) ;
VAR
i, n: CARDINAL ;
a : SYSTEM.ADDRESS ;
BEGIN
FlushOutErr ;
a := SYSTEM.ADR(to) ;
n := HIGH(to)+1 ;
LOOP
RawRead(cid, a, n, i) ;
IF (n=0) OR
(ReadResult(cid)=wrongFormat) OR
(ReadResult(cid)=endOfInput)
THEN
EXIT
ELSE
INC(a, i) ;
DEC(n, i)
END
END
END Read ;
(*
memDump -
*)
PROCEDURE memDump (a: SYSTEM.ADDRESS; len: CARDINAL) ;
VAR
i, j: CARDINAL ;
p : POINTER TO SYSTEM.LOC ;
BEGIN
p := a ;
j := 0 ;
FOR i := 0 TO len DO
IF j MOD 16 = 0
THEN
printf ("\n%p %02x", p, VAL(CARDINAL, p^))
ELSE
printf (" %02x", VAL(CARDINAL, p^))
END ;
INC(p) ;
INC(j)
END ;
printf ("\n")
END memDump ;
(*
Write - storage units to cid from successive components of from.
*)
PROCEDURE Write (cid: IOChan.ChanId; from: ARRAY OF SYSTEM.LOC);
BEGIN
(*
printf ("in RawIO.mod ");
memDump (SYSTEM.ADR(from), HIGH(from)+1) ;
*)
RawWrite(cid, SYSTEM.ADR(from), HIGH(from)+1)
END Write ;
END RawIO.
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