From 7ccad68acf3805b35721e861fb9bc5a9e40effc8 Mon Sep 17 00:00:00 2001 From: Pedro Alvarez Date: Tue, 31 May 2016 10:43:16 +0100 Subject: Import http://www.multiprecision.org/mpc/download/mpc-1.0.3.tar.gz --- mpc/src/cosh.c | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 mpc/src/cosh.c (limited to 'mpc/src/cosh.c') diff --git a/mpc/src/cosh.c b/mpc/src/cosh.c new file mode 100644 index 0000000000..0d4aab9e4d --- /dev/null +++ b/mpc/src/cosh.c @@ -0,0 +1,35 @@ +/* mpc_cosh -- hyperbolic cosine of a complex number. + +Copyright (C) 2008, 2009, 2011 INRIA + +This file is part of GNU MPC. + +GNU MPC is free software; you can redistribute it and/or modify it under +the terms of the GNU Lesser General Public License as published by the +Free Software Foundation; either version 3 of the License, or (at your +option) any later version. + +GNU MPC 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 Lesser General Public License for +more details. + +You should have received a copy of the GNU Lesser General Public License +along with this program. If not, see http://www.gnu.org/licenses/ . +*/ + +#include "mpc-impl.h" + +int +mpc_cosh (mpc_ptr rop, mpc_srcptr op, mpc_rnd_t rnd) +{ + /* cosh(op) = cos(i*op) */ + mpc_t z; + + /* z = i*op without copying significand */ + mpc_realref (z)[0] = mpc_imagref (op)[0]; + mpc_imagref (z)[0] = mpc_realref (op)[0]; + MPFR_CHANGE_SIGN (mpc_realref (z)); + + return mpc_cos (rop, z, rnd); +} -- cgit v1.2.1