Check for the presence of sys/select.h and conditionally #include it.
[libav.git] / libavformat / os_support.c
CommitLineData
f71869a4
FB
1/*
2 * Various utilities for ffmpeg system
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
54eb77c0 4 * copyright (c) 2002 Francois Revol
f71869a4 5 *
b78e7197
DB
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
f71869a4
FB
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
b78e7197 11 * version 2.1 of the License, or (at your option) any later version.
f71869a4 12 *
b78e7197 13 * FFmpeg is distributed in the hope that it will be useful,
f71869a4
FB
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
b78e7197 19 * License along with FFmpeg; if not, write to the Free Software
5509bffa 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
f71869a4 21 */
17c22f57 22#include "config.h"
f71869a4 23#include "avformat.h"
f71869a4
FB
24#include <unistd.h>
25#include <fcntl.h>
087b3272 26#include "os_support.h"
36c07acd 27
72d6b1bf 28#ifdef CONFIG_NETWORK
b0c858d8 29#ifndef HAVE_SYS_POLL_H
6ff3f3e7 30#ifdef HAVE_WINSOCK2_H
36c07acd 31#include <winsock2.h>
81644c2e 32#elif defined (HAVE_SYS_SELECT_H)
b0c858d8
FR
33#include <sys/select.h>
34#endif
36c07acd 35#endif
f71869a4 36
383eda23
AB
37#include "network.h"
38
39#if !defined(HAVE_INET_ATON)
eaa53b95
DB
40#include <stdlib.h>
41#include <strings.h>
eaa53b95 42
54eb77c0
DB
43int inet_aton (const char * str, struct in_addr * add)
44{
54eb77c0
DB
45 unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0;
46
d72e7d0f
BF
47 if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4)
48 return 0;
54eb77c0 49
104d0418
JP
50 if (!add1 || (add1|add2|add3|add4) > 255) return 0;
51
54eb77c0
DB
52 add->s_addr=(add4<<24)+(add3<<16)+(add2<<8)+add1;
53
54 return 1;
55}
383eda23
AB
56#endif /* !defined(HAVE_INET_ATON) */
57
58/* resolve host with also IP address parsing */
59int resolve_host(struct in_addr *sin_addr, const char *hostname)
60{
61 struct hostent *hp;
4ee10633 62
383eda23 63 if (!inet_aton(hostname, sin_addr)) {
4ee10633
DB
64 hp = gethostbyname(hostname);
65 if (!hp)
66 return -1;
67 memcpy(sin_addr, hp->h_addr, sizeof(struct in_addr));
383eda23
AB
68 }
69 return 0;
70}
ba472aaf
AB
71
72int ff_socket_nonblock(int socket, int enable)
73{
6ff3f3e7 74#ifdef HAVE_WINSOCK2_H
5676d140
AB
75 return ioctlsocket(socket, FIONBIO, &enable);
76#else
ba472aaf
AB
77 if (enable)
78 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK);
79 else
80 return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK);
5676d140 81#endif
ba472aaf 82}
383eda23 83#endif /* CONFIG_NETWORK */
b0c858d8 84
457b101e 85#ifdef CONFIG_FFSERVER
b0c858d8
FR
86#ifndef HAVE_SYS_POLL_H
87int poll(struct pollfd *fds, nfds_t numfds, int timeout)
88{
89 fd_set read_set;
90 fd_set write_set;
91 fd_set exception_set;
92 nfds_t i;
93 int n;
94 int rc;
95
6ff3f3e7 96#ifdef HAVE_WINSOCK2_H
7235183d
AB
97 if (numfds >= FD_SETSIZE) {
98 errno = EINVAL;
99 return -1;
100 }
3e2e29fb 101#endif
7235183d 102
b0c858d8
FR
103 FD_ZERO(&read_set);
104 FD_ZERO(&write_set);
105 FD_ZERO(&exception_set);
106
107 n = -1;
108 for(i = 0; i < numfds; i++) {
109 if (fds[i].fd < 0)
110 continue;
6ff3f3e7 111#ifndef HAVE_WINSOCK2_H
3e2e29fb
AB
112 if (fds[i].fd >= FD_SETSIZE) {
113 errno = EINVAL;
114 return -1;
115 }
116#endif
b0c858d8
FR
117
118 if (fds[i].events & POLLIN) FD_SET(fds[i].fd, &read_set);
119 if (fds[i].events & POLLOUT) FD_SET(fds[i].fd, &write_set);
120 if (fds[i].events & POLLERR) FD_SET(fds[i].fd, &exception_set);
121
122 if (fds[i].fd > n)
123 n = fds[i].fd;
124 };
125
126 if (n == -1)
127 /* Hey!? Nothing to poll, in fact!!! */
128 return 0;
129
130 if (timeout < 0)
131 rc = select(n+1, &read_set, &write_set, &exception_set, NULL);
132 else {
133 struct timeval tv;
134
135 tv.tv_sec = timeout / 1000;
136 tv.tv_usec = 1000 * (timeout % 1000);
137 rc = select(n+1, &read_set, &write_set, &exception_set, &tv);
138 };
139
140 if (rc < 0)
141 return rc;
142
143 for(i = 0; i < (nfds_t) n; i++) {
144 fds[i].revents = 0;
145
146 if (FD_ISSET(fds[i].fd, &read_set)) fds[i].revents |= POLLIN;
147 if (FD_ISSET(fds[i].fd, &write_set)) fds[i].revents |= POLLOUT;
148 if (FD_ISSET(fds[i].fd, &exception_set)) fds[i].revents |= POLLERR;
149 };
150
151 return rc;
152}
b0c858d8 153#endif /* HAVE_SYS_POLL_H */
457b101e 154#endif /* CONFIG_FFSERVER */
b0c858d8 155