11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*- 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 2005 David Schultz <das@FreeBSD.ORG> 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/cdefs.h> 28a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott Hughes#include <sys/limits.h> 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <fenv.h> 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <math.h> 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#ifndef type 33a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott Hughes__FBSDID("$FreeBSD$"); 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define type double 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define roundit round 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define dtype long 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define DTYPE_MIN LONG_MIN 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define DTYPE_MAX LONG_MAX 391dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define fn lround 401dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#endif 411dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 421dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * If type has more precision than dtype, the endpoints dtype_(min|max) are 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * of the form xxx.5; they are "out of range" because lround() rounds away 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * from 0. On the other hand, if type has less precision than dtype, then 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * all values that are out of range are integral, so we might as well assume 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * that everything is in range. At compile time, INRANGE(x) should reduce to 481dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * two floating-point comparisons in the former case, or TRUE otherwise. 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic const type dtype_min = DTYPE_MIN - 0.5; 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectstatic const type dtype_max = DTYPE_MAX + 0.5; 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define INRANGE(x) (dtype_max - DTYPE_MAX != 0.5 || \ 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ((x) > dtype_min && (x) < dtype_max)) 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectdtype 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectfn(type x) 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 591dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project if (INRANGE(x)) { 601dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project x = roundit(x); 611dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return ((dtype)x); 621dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } else { 631dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project feraiseexcept(FE_INVALID); 641dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (DTYPE_MAX); 651dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project } 661dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 67