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/*
* libexplain - Explain errno values returned by libc functions
* Copyright (C) 2009-2013 Peter Miller
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 3 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <libexplain/ac/errno.h>
#include <libexplain/ac/stdlib.h>
#include <libexplain/strtof.h>
#include <libexplain/output.h>
float
explain_strtof_on_error(const char *nptr, char **endptr)
{
int hold_errno;
char *dummy;
float result;
hold_errno = errno;
dummy = 0;
errno = 0;
result = explain_ac_strtof(nptr, endptr ? endptr : &dummy);
if (errno == 0 && (endptr ? *endptr : dummy) == nptr)
{
/*
* Some implementations do this natively.
* Fake it on those that don't.
*/
errno = EINVAL;
}
if (errno != 0)
{
hold_errno = errno;
explain_output_message
(
explain_errno_strtof(hold_errno, nptr, endptr)
);
}
errno = hold_errno;
return result;
}
/* vim: set ts=8 sw=4 et : */
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