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sortix--sortix/libc/stdio/fflush_stop_writing.cpp

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/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 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/fflush_stop_writing.cpp
Resets the FILE to a consistent state so it is ready for reading.
*******************************************************************************/
#include <errno.h>
#include <stdio.h>
extern "C" int fflush_stop_writing(FILE* fp)
{
if ( !(fp->flags & _FILE_LAST_WRITE) )
return 0;
if ( !fp->write_func )
return errno = EBADF, EOF;
size_t size = sizeof(unsigned char);
size_t count = fp->amount_output_buffered;
int ret = 0;
if ( fp->write_func(fp->buffer, size, count, fp->user) != count )
ret = EOF; // TODO: Set errno!
fp->amount_output_buffered = 0;
fp->flags &= ~_FILE_LAST_WRITE;
return ret;
}