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(* FloatingUtilities.mod provides a Logitech compatible library.
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/>. *)
IMPLEMENTATION MODULE FloatingUtilities ;
(*
Frac - returns the fractional component of, r.
*)
PROCEDURE Frac (r: REAL) : REAL ;
BEGIN
RETURN r-VAL(REAL, Int(r))
END Frac ;
(*
Int - returns the integer part of r. It rounds the value towards zero.
*)
PROCEDURE Int (r: REAL) : INTEGER ;
BEGIN
IF r>=0.0
THEN
RETURN VAL(INTEGER, r)
ELSE
RETURN -VAL(INTEGER, -r)
END
END Int ;
(*
Round - returns the number rounded to the nearest integer.
It rounds away from zero.
*)
PROCEDURE Round (r: REAL) : INTEGER ;
BEGIN
IF r>=0.0
THEN
RETURN Int(r+0.5)
ELSE
RETURN Int(r-0.5)
END
END Round ;
(*
Float - returns a REAL value corresponding to, i.
*)
PROCEDURE Float (i: INTEGER) : REAL ;
BEGIN
RETURN VAL(REAL, i)
END Float ;
(*
Trunc - round to the nearest integer not larger in absolute
value.
*)
PROCEDURE Trunc (r: REAL) : INTEGER ;
BEGIN
RETURN TRUNC(r)
END Trunc ;
(*
Fracl - returns the fractional component of, r.
*)
PROCEDURE Fracl (r: LONGREAL) : LONGREAL ;
BEGIN
RETURN r-VAL(LONGREAL, Intl(r))
END Fracl ;
(*
Intl - returns the integer part of r. It rounds the value towards zero.
*)
PROCEDURE Intl (r: LONGREAL) : LONGINT ;
BEGIN
IF r>=0.0
THEN
RETURN VAL(LONGINT, r)
ELSE
RETURN -VAL(LONGINT, -r)
END
END Intl ;
(*
Roundl - returns the number rounded to the nearest integer.
*)
PROCEDURE Roundl (r: LONGREAL) : LONGINT ;
BEGIN
IF r>=0.0
THEN
RETURN Intl(r+0.5)
ELSE
RETURN Intl(r-0.5)
END
END Roundl ;
(*
Floatl - returns a REAL value corresponding to, i.
*)
PROCEDURE Floatl (i: INTEGER) : LONGREAL ;
BEGIN
RETURN VAL(LONGREAL, i)
END Floatl ;
(*
Truncl - round to the nearest integer not larger in absolute
value.
*)
PROCEDURE Truncl (r: LONGREAL) : LONGINT ;
BEGIN
RETURN VAL(LONGINT, r)
END Truncl ;
END FloatingUtilities.
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