/fbus/fbus_stream.c

 1/*
 2 * File:    fbus_stream.h
 3 * Author:  Li XianJing <xianjimli@hotmail.com>
 4 * Brief:   stream common used functions.
 5 *
 6 * Copyright (c) 2009 - 2010  Li XianJing <xianjimli@hotmail.com>
 7 *
 8 * Licensed under the Academic Free License version 2.1
 9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
23 */
24
25/*
26 * History:
27 * ================================================================
28 * 2010-07-25 Li XianJing <xianjimli@hotmail.com> created
29 *
30 */
31
32#include "fbus_stream.h"
33
34int fbus_stream_read_n(FBusStream* thiz, char* buffer, size_t len)
35{
36	int ret = 0;
37	int remain = len;
38	return_val_if_fail(thiz != NULL && buffer != NULL, -1);
39
40	do
41	{
42		if((ret = fbus_stream_read(thiz, buffer + len - remain, remain)) > 0)
43		{
44			remain -= ret;
45		}
46	}while(remain > 0 && ret > 0);
47
48	return len - remain;
49}
50
51int fbus_stream_write_n(FBusStream* thiz, const char* buffer, size_t len)
52{
53	int ret = 0;
54	int remain = len;
55	return_val_if_fail(thiz != NULL && buffer != NULL, -1);
56
57	do
58	{
59		if((ret = fbus_stream_write(thiz, buffer + len - remain, remain)) > 0)
60		{
61			remain -= ret;
62		}
63	}while(remain > 0 && ret > 0);
64
65	return len - remain;
66}
67