| Elliott Hughes | 0549371 | 2014-04-17 17:30:03 -0700 | [diff] [blame] | 1 | /* $OpenBSD: floatio.h,v 1.4 2008/09/07 20:36:08 martynas Exp $ */ |
| The Android Open Source Project | 1dc9e47 | 2009-03-03 19:28:35 -0800 | [diff] [blame] | 2 | |
| 3 | /*- |
| 4 | * Copyright (c) 1990, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley by |
| 8 | * Chris Torek. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | */ |
| 34 | |
| 35 | /* |
| 36 | * Floating point scanf/printf (input/output) definitions. |
| 37 | */ |
| 38 | |
| 39 | /* 11-bit exponent (VAX G floating point) is 308 decimal digits */ |
| 40 | #define MAXEXP 308 |
| 41 | /* 128 bit fraction takes up 39 decimal digits; max reasonable precision */ |
| 42 | #define MAXFRACT 39 |
| Elliott Hughes | 0549371 | 2014-04-17 17:30:03 -0700 | [diff] [blame] | 43 | |
| 44 | /* |
| 45 | * MAXEXPDIG is the maximum number of decimal digits needed to store a |
| 46 | * floating point exponent in the largest supported format. It should |
| 47 | * be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point |
| 48 | * conversions are supported, ceil(log10(LDBL_MAX_EXP)). But since it |
| 49 | * is presently never greater than 5 in practice, we fudge it. |
| 50 | */ |
| 51 | #define MAXEXPDIG 6 |
| 52 | #if LDBL_MAX_EXP > 999999 |
| 53 | #error "floating point buffers too small" |
| 54 | #endif |
| 55 | |
| 56 | char *__hdtoa(double, const char *, int, int *, int *, char **); |
| 57 | char *__hldtoa(long double, const char *, int, int *, int *, char **); |
| 58 | char *__ldtoa(long double *, int, int, int *, int *, char **); |