/* * Copyright (c) 2015 Jiri Svoboda * Copyright (c) 2014 Martin Decky * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * - Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * - The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /** @addtogroup libmath * @{ */ /** @file */ #include <math.h> #include "internal.h" /** Cosine (32-bit floating point) * * Compute cosine value. * * @param arg Cosine argument. * * @return Cosine value. * */ float cosf(float arg) { float base_arg = fmodf(arg, 2 * M_PI); if (base_arg < 0) return __math_base_cos_32(-base_arg); return __math_base_cos_32(base_arg); } /** Cosine (64-bit floating point) * * Compute cosine value. * * @param arg Cosine argument. * * @return Cosine value. * */ double cos(double arg) { double base_arg = fmod(arg, 2 * M_PI); if (base_arg < 0) return __math_base_cos_64(-base_arg); return __math_base_cos_64(base_arg); } /** @} */