7f0849fd11
The parsefloat routines -- which let us pass NaNs and infinities on to strto(f|d|ld) -- come from NetBSD. Also fix LP64's strtold to return a NaN, and fix all the architectures to return quiet NaNs. Also fix wcstof/wcstod/wcstold to use parsefloat so they support hex floats. Lots of new tests. Bug: http://b/31101647 Change-Id: Id7d46ac2d8acb8770b5e8c445e87cfabfde6f111
58 lines
2.6 KiB
C
58 lines
2.6 KiB
C
/* $OpenBSD: floatio.h,v 1.4 2008/09/07 20:36:08 martynas Exp $ */
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Floating point scanf/printf (input/output) definitions.
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*/
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/* 11-bit exponent (VAX G floating point) is 308 decimal digits */
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#define MAXEXP 308
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/* 128 bit fraction takes up 39 decimal digits; max reasonable precision */
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#define MAXFRACT 39
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/*
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* MAXEXPDIG is the maximum number of decimal digits needed to store a
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* floating point exponent in the largest supported format. It should
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* be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point
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* conversions are supported, ceil(log10(LDBL_MAX_EXP)). But since it
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* is presently never greater than 5 in practice, we fudge it.
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*/
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#define MAXEXPDIG 6
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#if LDBL_MAX_EXP > 999999
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#error "floating point buffers too small"
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#endif
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char *__hdtoa(double, const char *, int, int *, int *, char **);
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char *__hldtoa(long double, const char *, int, int *, int *, char **);
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char *__ldtoa(long double *, int, int, int *, int *, char **);
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