983523b9f52398aeefe3a847c2803b0b65d396c0
[libav.git] / libavformat / os_support.c
1 /*
2 * Various utilities for ffmpeg system
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 * copyright (c) 2002 Francois Revol
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
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
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22 #include "config.h"
23 #include "avformat.h"
24 #include <unistd.h>
25 #include <fcntl.h>
26 #include "os_support.h"
27
28 #ifdef CONFIG_NETWORK
29 #ifndef HAVE_SYS_POLL_H
30 #ifdef HAVE_WINSOCK2_H
31 #include <winsock2.h>
32 #else
33 #include <sys/select.h>
34 #endif
35 #endif
36
37 #include "network.h"
38
39 #if !defined(HAVE_INET_ATON)
40 #include <stdlib.h>
41 #include <strings.h>
42
43 int inet_aton (const char * str, struct in_addr * add)
44 {
45 unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0;
46
47 if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4)
48 return 0;
49
50 if (!add1 || (add1|add2|add3|add4) > 255) return 0;
51
52 add->s_addr=(add4<<24)+(add3<<16)+(add2<<8)+add1;
53
54 return 1;
55 }
56 #endif /* !defined(HAVE_INET_ATON) */
57
58 /* resolve host with also IP address parsing */
59 int resolve_host(struct in_addr *sin_addr, const char *hostname)
60 {
61 struct hostent *hp;
62
63 if (!inet_aton(hostname, sin_addr)) {
64 hp = gethostbyname(hostname);
65 if (!hp)
66 return -1;
67 memcpy(sin_addr, hp->h_addr, sizeof(struct in_addr));
68 }
69 return 0;
70 }
71
72 int ff_socket_nonblock(int socket, int enable)
73 {
74 #ifdef HAVE_WINSOCK2_H
75 return ioctlsocket(socket, FIONBIO, &enable);
76 #else
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);
81 #endif
82 }
83 #endif /* CONFIG_NETWORK */
84
85 #ifdef CONFIG_FFSERVER
86 #ifndef HAVE_SYS_POLL_H
87 int 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
96 #ifdef HAVE_WINSOCK2_H
97 if (numfds >= FD_SETSIZE) {
98 errno = EINVAL;
99 return -1;
100 }
101 #endif
102
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;
111 #ifndef HAVE_WINSOCK2_H
112 if (fds[i].fd >= FD_SETSIZE) {
113 errno = EINVAL;
114 return -1;
115 }
116 #endif
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 }
153 #endif /* HAVE_SYS_POLL_H */
154 #endif /* CONFIG_FFSERVER */
155