/*
 * File:    fbus_stream.h
 * Author:  Li XianJing <xianjimli@hotmail.com>
 * Brief:   stream common used functions.
 *
 * Copyright (c) 2009 - 2010  Li XianJing <xianjimli@hotmail.com>
 *
 * Licensed under the Academic Free License version 2.1
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

/*
 * History:
 * ================================================================
 * 2010-07-25 Li XianJing <xianjimli@hotmail.com> created
 *
 */

#include "fbus_stream.h"

int fbus_stream_read_n(FBusStream* thiz, char* buffer, size_t len)
{
	int ret = 0;
	int remain = len;
	return_val_if_fail(thiz != NULL && buffer != NULL, -1);

	do
	{
		if((ret = fbus_stream_read(thiz, buffer + len - remain, remain)) > 0)
		{
			remain -= ret;
		}
	}while(remain > 0 && ret > 0);

	return len - remain;
}

int fbus_stream_write_n(FBusStream* thiz, const char* buffer, size_t len)
{
	int ret = 0;
	int remain = len;
	return_val_if_fail(thiz != NULL && buffer != NULL, -1);

	do
	{
		if((ret = fbus_stream_write(thiz, buffer + len - remain, remain)) > 0)
		{
			remain -= ret;
		}
	}while(remain > 0 && ret > 0);

	return len - remain;
}