1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2015 Nahanni Systems, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/types.h>
30#include <unistd.h>
31
32#include <errno.h>
33
34#include "sockstream.h"
35
36ssize_t
37stream_read(int fd, void *buf, ssize_t nbytes)
38{
39	uint8_t *p;
40	ssize_t len = 0;
41	ssize_t n;
42
43	p = buf;
44
45	while (len < nbytes) {
46		n = read(fd, p + len, nbytes - len);
47		if (n == 0)
48			break;
49
50		if (n < 0) {
51			if (errno == EINTR || errno == EAGAIN)
52				continue;
53			return (n);
54		}
55		len += n;
56	}
57	return (len);
58}
59
60ssize_t
61stream_write(int fd, const void *buf, ssize_t nbytes)
62{
63	const uint8_t *p;
64	ssize_t len = 0;
65	ssize_t n;
66
67	p = buf;
68
69	while (len < nbytes) {
70		n = write(fd, p + len, nbytes - len);
71		if (n == 0)
72			break;
73		if (n < 0) {
74			if (errno == EINTR || errno == EAGAIN)
75				continue;
76			return (n);
77		}
78		len += n;
79	}
80	return (len);
81}
82