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/* An ftell() function that works around platform bugs.
Copyright (C) 2007-2021 Free Software Foundation, Inc.
This file 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 2.1 of the
License, or (at your option) any later version.
This file 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 <https://www.gnu.org/licenses/>. */
#include <config.h>
/* Specification. */
#include <stdio.h>
#include <errno.h>
#include <limits.h>
long
ftell (FILE *fp)
{
/* Use the replacement ftello function with all its workarounds. */
off_t offset = ftello (fp);
if (LONG_MIN <= offset && offset <= LONG_MAX)
return /* (long) */ offset;
else
{
errno = EOVERFLOW;
return -1;
}
}
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