/*- * Copyright (c) 2005 David Schultz * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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. */ #include /* * If type has more precision than dtype, the endpoints dtype_(min|max) are * of the form xxx.5; they are "out of range" because lround() rounds away * from 0. On the other hand, if type has less precision than dtype, then * all values that are out of range are integral, so we might as well assume * that everything is in range. At compile time, INRANGE(x) should reduce to * two floating-point comparisons in the former case, or TRUE otherwise. */ static const type dtype_min = DTYPE_MIN - (type)0.5; static const type dtype_max = DTYPE_MAX + (type)0.5; #define INRANGE(x) (dtype_max - DTYPE_MAX != (type)0.5 || \ ((x) > dtype_min && (x) < dtype_max)) dtype fn(type x) { if (INRANGE(x)) { x = roundit(x); return ((dtype)x); } else { #ifdef FE_INVALID feraiseexcept(FE_INVALID); #endif return (DTYPE_MAX); } }