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(* BlockOps.def provides a Logitech compatible module for block moves.
Copyright (C) 2005-2025 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/>. *)
DEFINITION MODULE BlockOps ;
FROM SYSTEM IMPORT ADDRESS ;
(*
MoveBlockForward - moves, n, bytes from, src, to, dest.
Starts copying from src and keep copying
until, n, bytes have been copied.
*)
PROCEDURE BlockMoveForward (dest, src: ADDRESS; n: CARDINAL) ;
(*
MoveBlockBackward - moves, n, bytes from, src, to, dest.
Starts copying from src+n and keeps copying
until, n, bytes have been copied.
The last datum to be copied will be the byte
at address, src.
*)
PROCEDURE BlockMoveBackward (dest, src: ADDRESS; n: CARDINAL) ;
(*
BlockClear - fills, block..block+n-1, with zero's.
*)
PROCEDURE BlockClear (block: ADDRESS; n: CARDINAL) ;
(*
BlockSet - fills, n, bytes starting at, block, with a pattern
defined at address pattern..pattern+patternSize-1.
*)
PROCEDURE BlockSet (block: ADDRESS; n: CARDINAL;
pattern: ADDRESS; patternSize: CARDINAL) ;
(*
BlockEqual - returns TRUE if the blocks defined, a..a+n-1, and,
b..b+n-1 contain the same bytes.
*)
PROCEDURE BlockEqual (a, b: ADDRESS; n: CARDINAL) : BOOLEAN ;
(*
BlockPosition - searches for a pattern as defined by
pattern..patternSize-1 in the block,
block..block+blockSize-1. It returns
the offset from block indicating the
first occurence of, pattern.
MAX(CARDINAL) is returned if no match
is detected.
*)
PROCEDURE BlockPosition (block: ADDRESS; blockSize: CARDINAL;
pattern: ADDRESS; patternSize: CARDINAL) : CARDINAL ;
END BlockOps.
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