1*63161a5dSguenther /* $OpenBSD: floatio.h,v 1.5 2015/09/14 12:49:33 guenther Exp $ */ 2df930be7Sderaadt 3df930be7Sderaadt /*- 4df930be7Sderaadt * Copyright (c) 1990, 1993 5df930be7Sderaadt * The Regents of the University of California. All rights reserved. 6df930be7Sderaadt * 7df930be7Sderaadt * This code is derived from software contributed to Berkeley by 8df930be7Sderaadt * Chris Torek. 9df930be7Sderaadt * 10df930be7Sderaadt * Redistribution and use in source and binary forms, with or without 11df930be7Sderaadt * modification, are permitted provided that the following conditions 12df930be7Sderaadt * are met: 13df930be7Sderaadt * 1. Redistributions of source code must retain the above copyright 14df930be7Sderaadt * notice, this list of conditions and the following disclaimer. 15df930be7Sderaadt * 2. Redistributions in binary form must reproduce the above copyright 16df930be7Sderaadt * notice, this list of conditions and the following disclaimer in the 17df930be7Sderaadt * documentation and/or other materials provided with the distribution. 186580fee3Smillert * 3. Neither the name of the University nor the names of its contributors 19df930be7Sderaadt * may be used to endorse or promote products derived from this software 20df930be7Sderaadt * without specific prior written permission. 21df930be7Sderaadt * 22df930be7Sderaadt * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23df930be7Sderaadt * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24df930be7Sderaadt * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25df930be7Sderaadt * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26df930be7Sderaadt * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27df930be7Sderaadt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28df930be7Sderaadt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29df930be7Sderaadt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30df930be7Sderaadt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31df930be7Sderaadt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32df930be7Sderaadt * SUCH DAMAGE. 33df930be7Sderaadt */ 34df930be7Sderaadt 35df930be7Sderaadt /* 36df930be7Sderaadt * Floating point scanf/printf (input/output) definitions. 37df930be7Sderaadt */ 38df930be7Sderaadt 39df930be7Sderaadt /* 11-bit exponent (VAX G floating point) is 308 decimal digits */ 40df930be7Sderaadt #define MAXEXP 308 41df930be7Sderaadt /* 128 bit fraction takes up 39 decimal digits; max reasonable precision */ 42df930be7Sderaadt #define MAXFRACT 39 437b36286aSmartynas 447b36286aSmartynas /* 457b36286aSmartynas * MAXEXPDIG is the maximum number of decimal digits needed to store a 467b36286aSmartynas * floating point exponent in the largest supported format. It should 477b36286aSmartynas * be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point 487b36286aSmartynas * conversions are supported, ceil(log10(LDBL_MAX_EXP)). But since it 497b36286aSmartynas * is presently never greater than 5 in practice, we fudge it. 507b36286aSmartynas */ 517b36286aSmartynas #define MAXEXPDIG 6 527b36286aSmartynas #if LDBL_MAX_EXP > 999999 537b36286aSmartynas #error "floating point buffers too small" 547b36286aSmartynas #endif 55