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- /************************************************************************
- * *
- * N O T I C E *
- * *
- * Copyright Abandoned, 1987, Fred Fish *
- * *
- * This previously copyrighted work has been placed into the *
- * public domain by the author (Fred Fish) and may be freely used *
- * for any purpose, private or commercial. I would appreciate *
- * it, as a courtesy, if this notice is left in all copies and *
- * derivative works. Thank you, and enjoy... *
- * *
- * The author makes no warranty of any kind with respect to this *
- * product and explicitly disclaims any implied warranties of *
- * merchantability or fitness for any particular purpose. *
- * *
- ************************************************************************
- */
-
- /*
- * FUNCTION
- *
- * csinh complex double precision hyperbolic sine
- *
- * KEY WORDS
- *
- * csinh
- * machine independent routines
- * complex functions
- * math libraries
- *
- * DESCRIPTION
- *
- * Computes double precision complex hyperbolic sine of
- * a double precision complex argument.
- *
- * USAGE
- *
- * COMPLEX csinh (z)
- * COMPLEX z;
- *
- * PROGRAMMER
- *
- * Fred Fish
- * Tempe, Az 85281
- * (602) 966-8871
- *
- * INTERNALS
- *
- * Computes complex hyperbolic sine of z = x + j y from:
- *
- * csinh(z) = 0.5 * ( cexp(z) - cexp(-z) )
- *
- */
-
- #if defined (__M68881__) && !defined (_M68881)
- /*# define _M68881*/
- #endif
-
- #include <stdio.h>
- #include <math.h>
- #include "pml.h"
-
- COMPLEX csinh (z)
- COMPLEX z;
- {
- COMPLEX cexpmz;
-
- cexpmz.real = -z.real;
- cexpmz.imag = -z.imag;
- cexpmz = cexp (cexpmz);
- z = cexp (z);
- z.real -= cexpmz.real;
- z.imag -= cexpmz.imag;
- z.real *= 0.5;
- z.imag *= 0.5;
-
- return (z);
- }
-