# The GNU Modula-2 front end to GCC

#### gm2-libs-iso/ShortComplexMath

```DEFINITION MODULE ShortComplexMath;

(* Mathematical functions for the type SHORTCOMPLEX *)

CONST

i =    CMPLX (0.0, 1.0);

one =  CMPLX (1.0, 0.0);

zero = CMPLX (0.0, 0.0);

PROCEDURE abs (z: SHORTCOMPLEX): SHORTREAL;
(* Returns the length of z *)

PROCEDURE arg (z: SHORTCOMPLEX): SHORTREAL;
(* Returns the angle that z subtends to the positive real axis *)

PROCEDURE conj (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the complex conjugate of z *)

PROCEDURE power (base: SHORTCOMPLEX; exponent: SHORTREAL): SHORTCOMPLEX;
(* Returns the value of the number base raised to the power exponent *)

PROCEDURE sqrt (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the principal square root of z *)

PROCEDURE exp (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the complex exponential of z *)

PROCEDURE ln (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the principal value of the natural logarithm of z *)

PROCEDURE sin (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the sine of z *)

PROCEDURE cos (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the cosine of z *)

PROCEDURE tan (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the tangent of z *)

PROCEDURE arcsin (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the arcsine of z *)

PROCEDURE arccos (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the arccosine of z *)

PROCEDURE arctan (z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the arctangent of z *)

PROCEDURE polarToComplex (abs, arg: SHORTREAL): SHORTCOMPLEX;
(* Returns the complex number with the specified polar coordinates *)

PROCEDURE scalarMult (scalar: SHORTREAL; z: SHORTCOMPLEX): SHORTCOMPLEX;
(* Returns the scalar product of scalar with z *)

PROCEDURE IsCMathException (): 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.
*)

END ShortComplexMath.

```