1*f432bbb6Schristos /* $NetBSD: floatio.h,v 1.5 2005/05/14 23:51:02 christos Exp $ */ 2255db7b2Sjtc 361f28255Scgd /*- 4255db7b2Sjtc * Copyright (c) 1990, 1993 5255db7b2Sjtc * The Regents of the University of California. All rights reserved. 661f28255Scgd * 761f28255Scgd * This code is derived from software contributed to Berkeley by 861f28255Scgd * Chris Torek. 961f28255Scgd * 1061f28255Scgd * Redistribution and use in source and binary forms, with or without 1161f28255Scgd * modification, are permitted provided that the following conditions 1261f28255Scgd * are met: 1361f28255Scgd * 1. Redistributions of source code must retain the above copyright 1461f28255Scgd * notice, this list of conditions and the following disclaimer. 1561f28255Scgd * 2. Redistributions in binary form must reproduce the above copyright 1661f28255Scgd * notice, this list of conditions and the following disclaimer in the 1761f28255Scgd * documentation and/or other materials provided with the distribution. 18eb7c1594Sagc * 3. Neither the name of the University nor the names of its contributors 1961f28255Scgd * may be used to endorse or promote products derived from this software 2061f28255Scgd * without specific prior written permission. 2161f28255Scgd * 2261f28255Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2361f28255Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2461f28255Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2561f28255Scgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2661f28255Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2761f28255Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2861f28255Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2961f28255Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 3061f28255Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 3161f28255Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3261f28255Scgd * SUCH DAMAGE. 3361f28255Scgd * 34255db7b2Sjtc * @(#)floatio.h 8.1 (Berkeley) 6/4/93 3561f28255Scgd */ 3661f28255Scgd 3761f28255Scgd /* 3861f28255Scgd * Floating point scanf/printf (input/output) definitions. 3961f28255Scgd */ 4061f28255Scgd 4161f28255Scgd /* 11-bit exponent (VAX G floating point) is 308 decimal digits */ 4261f28255Scgd #define MAXEXP 308 4361f28255Scgd /* 128 bit fraction takes up 39 decimal digits; max reasonable precision */ 4461f28255Scgd #define MAXFRACT 39 45*f432bbb6Schristos /* 46*f432bbb6Schristos * MAXEXPDIG is the maximum number of decimal digits needed to store a 47*f432bbb6Schristos * floating point exponent in the largest supported format. It should 48*f432bbb6Schristos * be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point 49*f432bbb6Schristos * conversions are supported, ceil(log10(LDBL_MAX_EXP)). But since it 50*f432bbb6Schristos * is presently never greater than 5 in practice, we fudge it. 51*f432bbb6Schristos */ 52*f432bbb6Schristos #define MAXEXPDIG 6 53*f432bbb6Schristos #if LDBL_MAX_EXP > 999999 54*f432bbb6Schristos #error "floating point buffers too small" 55*f432bbb6Schristos #endif 56