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sortix--sortix/libc/stdio/fseeko.cpp

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/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012.
This file is part of the Sortix C Library.
The Sortix C Library 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.
The Sortix C Library 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 the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
stdio/fseeko.cpp
Changes the current offset in a FILE.
*******************************************************************************/
#include <errno.h>
#include <stdio.h>
extern "C" int fseeko(FILE* fp, off_t offset, int whence)
{
if ( fflush(fp) != 0 )
return -1;
if ( !fp->seek_func )
return errno = EBADF, -1;
int ret = fp->seek_func(fp->user, offset, whence);
return ret;
}