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os_support.h
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1 /*
2  * various OS-feature replacement utilities
3  * copyright (c) 2000, 2001, 2002 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #ifndef AVFORMAT_OS_SUPPORT_H
23 #define AVFORMAT_OS_SUPPORT_H
24 
25 /**
26  * @file
27  * miscellaneous OS support macros and functions.
28  */
29 
30 #include "config.h"
31 
32 #include <sys/stat.h>
33 
34 #if defined(_WIN32) && !defined(__MINGW32CE__)
35 # include <fcntl.h>
36 # ifdef lseek
37 # undef lseek
38 # endif
39 # define lseek(f,p,w) _lseeki64((f), (p), (w))
40 # ifdef stat
41 # undef stat
42 # endif
43 # define stat _stati64
44 # ifdef fstat
45 # undef fstat
46 # endif
47 # define fstat(f,s) _fstati64((f), (s))
48 #endif /* defined(_WIN32) && !defined(__MINGW32CE__) */
49 
50 #ifdef _WIN32
51 #if HAVE_DIRECT_H
52 #include <direct.h>
53 #elif HAVE_IO_H
54 #include <io.h>
55 #endif
56 #define mkdir(a, b) _mkdir(a)
57 #endif
58 
59 static inline int is_dos_path(const char *path)
60 {
61 #if HAVE_DOS_PATHS
62  if (path[0] && path[1] == ':')
63  return 1;
64 #endif
65  return 0;
66 }
67 
68 #if defined(__OS2__) || defined(__Plan9__)
69 #define SHUT_RD 0
70 #define SHUT_WR 1
71 #define SHUT_RDWR 2
72 #endif
73 
74 #if defined(_WIN32)
75 #define SHUT_RD SD_RECEIVE
76 #define SHUT_WR SD_SEND
77 #define SHUT_RDWR SD_BOTH
78 
79 #ifndef S_IRUSR
80 #define S_IRUSR S_IREAD
81 #endif
82 #ifndef S_IWUSR
83 #define S_IWUSR S_IWRITE
84 #endif
85 #endif
86 
87 #if CONFIG_NETWORK
88 #if !HAVE_SOCKLEN_T
89 typedef int socklen_t;
90 #endif
91 
92 /* most of the time closing a socket is just closing an fd */
93 #if !HAVE_CLOSESOCKET
94 #define closesocket close
95 #endif
96 
97 #if !HAVE_POLL_H
98 typedef unsigned long nfds_t;
99 
100 #if HAVE_WINSOCK2_H
101 #include <winsock2.h>
102 #endif
103 #if !HAVE_STRUCT_POLLFD
104 struct pollfd {
105  int fd;
106  short events; /* events to look for */
107  short revents; /* events that occurred */
108 };
109 
110 /* events & revents */
111 #define POLLIN 0x0001 /* any readable data available */
112 #define POLLOUT 0x0002 /* file descriptor is writeable */
113 #define POLLRDNORM POLLIN
114 #define POLLWRNORM POLLOUT
115 #define POLLRDBAND 0x0008 /* priority readable data */
116 #define POLLWRBAND 0x0010 /* priority data can be written */
117 #define POLLPRI 0x0020 /* high priority readable data */
118 
119 /* revents only */
120 #define POLLERR 0x0004 /* errors pending */
121 #define POLLHUP 0x0080 /* disconnected */
122 #define POLLNVAL 0x1000 /* invalid file descriptor */
123 #endif
124 
125 
126 int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout);
127 #define poll ff_poll
128 #endif /* HAVE_POLL_H */
129 #endif /* CONFIG_NETWORK */
130 
131 #endif /* AVFORMAT_OS_SUPPORT_H */