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