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1 | /* $OpenBSD: floatio.h,v 1.4 2008/09/07 20:36:08 martynas Exp $ */ |
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 | |
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 **); |