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floatio.h revision 1.5 
      1  1.5  christos /*	$NetBSD: floatio.h,v 1.5 2005/05/14 23:51:02 christos Exp $	*/
      2  1.3       jtc 
      3  1.1       cgd /*-
      4  1.3       jtc  * Copyright (c) 1990, 1993
      5  1.3       jtc  *	The Regents of the University of California.  All rights reserved.
      6  1.1       cgd  *
      7  1.1       cgd  * This code is derived from software contributed to Berkeley by
      8  1.1       cgd  * Chris Torek.
      9  1.1       cgd  *
     10  1.1       cgd  * Redistribution and use in source and binary forms, with or without
     11  1.1       cgd  * modification, are permitted provided that the following conditions
     12  1.1       cgd  * are met:
     13  1.1       cgd  * 1. Redistributions of source code must retain the above copyright
     14  1.1       cgd  *    notice, this list of conditions and the following disclaimer.
     15  1.1       cgd  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.1       cgd  *    notice, this list of conditions and the following disclaimer in the
     17  1.1       cgd  *    documentation and/or other materials provided with the distribution.
     18  1.4       agc  * 3. Neither the name of the University nor the names of its contributors
     19  1.1       cgd  *    may be used to endorse or promote products derived from this software
     20  1.1       cgd  *    without specific prior written permission.
     21  1.1       cgd  *
     22  1.1       cgd  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     23  1.1       cgd  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     24  1.1       cgd  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     25  1.1       cgd  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     26  1.1       cgd  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     27  1.1       cgd  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     28  1.1       cgd  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     29  1.1       cgd  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     30  1.1       cgd  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     31  1.1       cgd  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     32  1.1       cgd  * SUCH DAMAGE.
     33  1.1       cgd  *
     34  1.3       jtc  *	@(#)floatio.h	8.1 (Berkeley) 6/4/93
     35  1.1       cgd  */
     36  1.1       cgd 
     37  1.1       cgd /*
     38  1.1       cgd  * Floating point scanf/printf (input/output) definitions.
     39  1.1       cgd  */
     40  1.1       cgd 
     41  1.1       cgd /* 11-bit exponent (VAX G floating point) is 308 decimal digits */
     42  1.1       cgd #define	MAXEXP		308
     43  1.1       cgd /* 128 bit fraction takes up 39 decimal digits; max reasonable precision */
     44  1.1       cgd #define	MAXFRACT	39
     45  1.5  christos /*
     46  1.5  christos  * MAXEXPDIG is the maximum number of decimal digits needed to store a
     47  1.5  christos  * floating point exponent in the largest supported format.  It should
     48  1.5  christos  * be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point
     49  1.5  christos  * conversions are supported, ceil(log10(LDBL_MAX_EXP)).  But since it
     50  1.5  christos  * is presently never greater than 5 in practice, we fudge it.
     51  1.5  christos  */
     52  1.5  christos #define MAXEXPDIG       6
     53  1.5  christos #if LDBL_MAX_EXP > 999999
     54  1.5  christos #error "floating point buffers too small"
     55  1.5  christos #endif
     56