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/* Copyright (c) 2002-2005 Michael Stumpf <mistumpf@de.pepperl-fuchs.com>
Copyright (c) 2006,2008 Dmitry Xmelkov
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
* Neither the name of the copyright holders nor the names of
contributors may be used to endorse or promote products derived
from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE. */
/* $Id: strtod.c 2191 2010-11-05 13:45:57Z arcanum $ */
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <math.h> /* INFINITY, NAN */
#include <string.h>
#include <stdlib.h>
#include <inttypes.h>
/** The strtod() function converts the initial portion of the string pointed
to by \a nptr to double representation.
The expected form of the string is an optional plus ( \c '+' ) or minus
sign ( \c '-' ) followed by a sequence of digits optionally containing
a decimal-point character, optionally followed by an exponent. An
exponent consists of an \c 'E' or \c 'e', followed by an optional plus
or minus sign, followed by a sequence of digits.
Leading white-space characters in the string are skipped.
The strtod() function returns the converted value, if any.
If \a endptr is not \c NULL, a pointer to the character after the last
character used in the conversion is stored in the location referenced by
\a endptr.
If no conversion is performed, zero is returned and the value of
\a nptr is stored in the location referenced by \a endptr.
If the correct value would cause overflow, plus or minus \c INFINITY is
returned (according to the sign of the value), and \c ERANGE is stored
in \c errno. If the correct value would cause underflow, zero is
returned and \c ERANGE is stored in \c errno.
*/
#include "stdio_private.h"
#define STRTOD
#include "conv_flt.c"
double
strtod (const char * nptr, char ** endptr)
{
int len = 0;
double flt;
unsigned char ret;
while (ISSPACE(nptr[len]))
len++;
ret = conv_flt(nptr, &len, INT_MAX, &flt, FL_LONG);
if (!ret) {
flt = 0.0;
len = 0;
}
if (endptr)
*endptr = (char *) nptr + len;
return flt;
}
#if defined(_HAVE_LONG_DOUBLE) && defined(_LDBL_EQ_DBL)
#ifdef _HAVE_ALIAS_ATTRIBUTE
#pragma GCC diagnostic ignored "-Wpragmas"
#pragma GCC diagnostic ignored "-Wunknown-warning-option"
#pragma GCC diagnostic ignored "-Wattribute-alias="
extern long double strtold(const char *, char **) __attribute__ ((__alias__ ("strtod")));
#else
long double
strtold (const char * nptr, char ** endptr)
{
return (long double) strtod(nptr, endptr);
}
#endif
#endif
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