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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 #ifdef __ANDROID__
60 # if HAVE_UNISTD_H
61 # include <unistd.h>
62 # endif
63 # ifdef lseek
64 # undef lseek
65 # endif
66 # define lseek(f,p,w) lseek64((f), (p), (w))
67 #endif
68 
69 static inline int is_dos_path(const char *path)
70 {
71 #if HAVE_DOS_PATHS
72  if (path[0] && path[1] == ':')
73  return 1;
74 #endif
75  return 0;
76 }
77 
78 #if defined(__OS2__) || defined(__Plan9__)
79 #define SHUT_RD 0
80 #define SHUT_WR 1
81 #define SHUT_RDWR 2
82 #endif
83 
84 #if defined(_WIN32)
85 #define SHUT_RD SD_RECEIVE
86 #define SHUT_WR SD_SEND
87 #define SHUT_RDWR SD_BOTH
88 
89 #ifndef S_IRUSR
90 #define S_IRUSR S_IREAD
91 #endif
92 #ifndef S_IWUSR
93 #define S_IWUSR S_IWRITE
94 #endif
95 #endif
96 
97 #if CONFIG_NETWORK
98 #if !HAVE_SOCKLEN_T
99 typedef int socklen_t;
100 #endif
101 
102 /* most of the time closing a socket is just closing an fd */
103 #if !HAVE_CLOSESOCKET
104 #define closesocket close
105 #endif
106 
107 #if !HAVE_POLL_H
108 typedef unsigned long nfds_t;
109 
110 #if HAVE_WINSOCK2_H
111 #include <winsock2.h>
112 #endif
113 #if !HAVE_STRUCT_POLLFD
114 struct pollfd {
115  int fd;
116  short events; /* events to look for */
117  short revents; /* events that occurred */
118 };
119 
120 /* events & revents */
121 #define POLLIN 0x0001 /* any readable data available */
122 #define POLLOUT 0x0002 /* file descriptor is writeable */
123 #define POLLRDNORM POLLIN
124 #define POLLWRNORM POLLOUT
125 #define POLLRDBAND 0x0008 /* priority readable data */
126 #define POLLWRBAND 0x0010 /* priority data can be written */
127 #define POLLPRI 0x0020 /* high priority readable data */
128 
129 /* revents only */
130 #define POLLERR 0x0004 /* errors pending */
131 #define POLLHUP 0x0080 /* disconnected */
132 #define POLLNVAL 0x1000 /* invalid file descriptor */
133 #endif
134 
135 
136 int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout);
137 #define poll ff_poll
138 #endif /* HAVE_POLL_H */
139 #endif /* CONFIG_NETWORK */
140 
141 #endif /* AVFORMAT_OS_SUPPORT_H */