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ffmpeg / libavformat / os_support.c @ 0a5790d1

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/*
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 * Various utilities for ffmpeg system
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 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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 * copyright (c) 2002 Francois Revol
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#include "config.h"
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#include "avformat.h"
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#include <unistd.h>
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#include <fcntl.h>
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#ifndef HAVE_SYS_POLL_H
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#ifdef HAVE_WINSOCK2_H
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#include <winsock2.h>
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#else
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#include <sys/select.h>
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#endif
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#endif
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#ifdef CONFIG_NETWORK
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#include "network.h"
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#if !defined(HAVE_INET_ATON)
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#include <stdlib.h>
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#include <strings.h>
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int inet_aton (const char * str, struct in_addr * add)
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{
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    unsigned int add1 = 0, add2 = 0, add3 = 0, add4 = 0;
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    if (sscanf(str, "%d.%d.%d.%d", &add1, &add2, &add3, &add4) != 4)
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        return 0;
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    if (!add1 || (add1|add2|add3|add4) > 255) return 0;
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    add->s_addr=(add4<<24)+(add3<<16)+(add2<<8)+add1;
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    return 1;
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}
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#endif /* !defined(HAVE_INET_ATON) */
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/* resolve host with also IP address parsing */
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int resolve_host(struct in_addr *sin_addr, const char *hostname)
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{
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    struct hostent *hp;
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    if (!inet_aton(hostname, sin_addr)) {
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        hp = gethostbyname(hostname);
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        if (!hp)
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            return -1;
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        memcpy(sin_addr, hp->h_addr, sizeof(struct in_addr));
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    }
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    return 0;
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}
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int ff_socket_nonblock(int socket, int enable)
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{
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#ifdef HAVE_WINSOCK2_H
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   return ioctlsocket(socket, FIONBIO, &enable);
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#else
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   if (enable)
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      return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) | O_NONBLOCK);
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   else
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      return fcntl(socket, F_SETFL, fcntl(socket, F_GETFL) & ~O_NONBLOCK);
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#endif
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}
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#endif /* CONFIG_NETWORK */
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#ifdef CONFIG_FFSERVER
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#ifndef HAVE_SYS_POLL_H
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int poll(struct pollfd *fds, nfds_t numfds, int timeout)
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{
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    fd_set read_set;
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    fd_set write_set;
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    fd_set exception_set;
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    nfds_t i;
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    int n;
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    int rc;
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#ifdef HAVE_WINSOCK2_H
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    if (numfds >= FD_SETSIZE) {
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        errno = EINVAL;
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        return -1;
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    }
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#endif
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    FD_ZERO(&read_set);
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    FD_ZERO(&write_set);
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    FD_ZERO(&exception_set);
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    n = -1;
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    for(i = 0; i < numfds; i++) {
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        if (fds[i].fd < 0)
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            continue;
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#ifndef HAVE_WINSOCK2_H
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        if (fds[i].fd >= FD_SETSIZE) {
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            errno = EINVAL;
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            return -1;
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        }
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#endif
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        if (fds[i].events & POLLIN)  FD_SET(fds[i].fd, &read_set);
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        if (fds[i].events & POLLOUT) FD_SET(fds[i].fd, &write_set);
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        if (fds[i].events & POLLERR) FD_SET(fds[i].fd, &exception_set);
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        if (fds[i].fd > n)
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            n = fds[i].fd;
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    };
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    if (n == -1)
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        /* Hey!? Nothing to poll, in fact!!! */
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        return 0;
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    if (timeout < 0)
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        rc = select(n+1, &read_set, &write_set, &exception_set, NULL);
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    else {
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        struct timeval    tv;
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        tv.tv_sec = timeout / 1000;
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        tv.tv_usec = 1000 * (timeout % 1000);
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        rc = select(n+1, &read_set, &write_set, &exception_set, &tv);
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    };
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    if (rc < 0)
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        return rc;
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    for(i = 0; i < (nfds_t) n; i++) {
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        fds[i].revents = 0;
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        if (FD_ISSET(fds[i].fd, &read_set))      fds[i].revents |= POLLIN;
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        if (FD_ISSET(fds[i].fd, &write_set))     fds[i].revents |= POLLOUT;
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        if (FD_ISSET(fds[i].fd, &exception_set)) fds[i].revents |= POLLERR;
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    };
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    return rc;
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}
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#endif /* HAVE_SYS_POLL_H */
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#endif /* CONFIG_FFSERVER */
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