1/*
2 * Copyright (c) 1995, 1996, 1997, 1998 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 *
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 *
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * 3. Neither the name of the Institute nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <config.h>
35
36#include "roken.h"
37
38/*
39 * Like write but never return partial data.
40 */
41
42#ifndef _WIN32
43
44ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
45net_write (rk_socket_t fd, const void *buf, size_t nbytes)
46{
47    const char *cbuf = (const char *)buf;
48    ssize_t count;
49    size_t rem = nbytes;
50
51    while (rem > 0) {
52	count = write (fd, cbuf, rem);
53	if (count < 0) {
54	    if (errno == EINTR)
55		continue;
56	    else
57		return count;
58	}
59	cbuf += count;
60	rem -= count;
61    }
62    return nbytes;
63}
64
65#else
66
67ROKEN_LIB_FUNCTION ssize_t ROKEN_LIB_CALL
68net_write(rk_socket_t sock, const void *buf, size_t nbytes)
69{
70    const char *cbuf = (const char *)buf;
71    ssize_t count;
72    size_t rem = nbytes;
73#ifdef SOCKET_IS_NOT_AN_FD
74    int use_write = 0;
75#endif
76
77    while (rem > 0) {
78#ifdef SOCKET_IS_NOT_AN_FD
79	if (use_write)
80	    count = _write (sock, cbuf, rem);
81	else
82	    count = send (sock, cbuf, rem, 0);
83
84	if (use_write == 0 &&
85	    rk_IS_SOCKET_ERROR(count) &&
86	    (rk_SOCK_ERRNO == WSANOTINITIALISED ||
87             rk_SOCK_ERRNO == WSAENOTSOCK)) {
88	    use_write = 1;
89
90	    count = _write (sock, cbuf, rem);
91	}
92#else
93	count = send (sock, cbuf, rem, 0);
94#endif
95	if (count < 0) {
96	    if (errno == EINTR)
97		continue;
98	    else
99		return count;
100	}
101	cbuf += count;
102	rem -= count;
103    }
104    return nbytes;
105}
106
107#endif
108