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(* RealMath.mod implement the ISO RealMath specification.
Copyright (C) 2003-2025 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 RealMath ;
IMPORT libm ;
IMPORT cbuiltin ;
PROCEDURE __ATTRIBUTE__ __BUILTIN__ ((__builtin_sqrt)) sqrt (x: REAL): REAL;
(* Returns the positive square root of x *)
BEGIN
RETURN cbuiltin.sqrt(x)
END sqrt ;
PROCEDURE __ATTRIBUTE__ __BUILTIN__ ((__builtin_exp)) exp (x: REAL): REAL;
(* Returns the exponential of x *)
BEGIN
RETURN cbuiltin.exp(x)
END exp ;
PROCEDURE __ATTRIBUTE__ __BUILTIN__ ((__builtin_log)) ln (x: REAL): REAL;
(* Returns the natural logarithm of x *)
BEGIN
RETURN cbuiltin.log(x)
END ln ;
(* The angle in all trigonometric functions is measured in radians *)
PROCEDURE __ATTRIBUTE__ __BUILTIN__ ((__builtin_sin)) sin (x: REAL): REAL;
(* Returns the sine of x *)
BEGIN
RETURN cbuiltin.sin(x)
END sin ;
PROCEDURE __ATTRIBUTE__ __BUILTIN__ ((__builtin_cos)) cos (x: REAL): REAL;
(* Returns the cosine of x *)
BEGIN
RETURN cbuiltin.cos(x)
END cos ;
PROCEDURE tan (x: REAL): REAL;
(* Returns the tangent of x *)
BEGIN
RETURN libm.tan(x)
END tan ;
PROCEDURE arcsin (x: REAL): REAL;
(* Returns the arcsine of x *)
BEGIN
RETURN libm.asin(x)
END arcsin ;
PROCEDURE arccos (x: REAL): REAL;
(* Returns the arccosine of x *)
BEGIN
RETURN libm.acos(x)
END arccos ;
PROCEDURE arctan (x: REAL): REAL;
(* Returns the arctangent of x *)
BEGIN
RETURN libm.atan(x)
END arctan ;
PROCEDURE power (base, exponent: REAL): REAL;
(* Returns the value of the number base raised to the power exponent *)
BEGIN
RETURN libm.pow(base, exponent)
END power ;
PROCEDURE round (x: REAL): INTEGER;
(* Returns the value of x rounded to the nearest integer *)
BEGIN
RETURN TRUNC(x) (* hmm we could provide access to the GNU Modula-2 built-in *)
END round ;
PROCEDURE IsRMathException (): BOOLEAN;
(* Returns TRUE if the current coroutine is in the exceptional execution state
because of the raising of an exception in a routine from this module; otherwise
returns FALSE.
*)
BEGIN
RETURN FALSE
END IsRMathException ;
END RealMath.
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