FFmpeg coverage


Directory: ../../../ffmpeg/
File: src/libavformat/os_support.h
Date: 2022-12-09 07:38:14
Exec Total Coverage
Lines: 2 2 100.0%
Functions: 1 1 100.0%
Branches: 0 0 -%

Line Branch Exec Source
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 #ifdef _WIN32
35 #if HAVE_DIRECT_H
36 #include <direct.h>
37 #endif
38 #if HAVE_IO_H
39 #include <io.h>
40 #endif
41 #endif
42
43 #ifdef _WIN32
44 # include <fcntl.h>
45 # include <stdint.h>
46 # ifdef lseek
47 # undef lseek
48 # endif
49 # define lseek(f,p,w) _lseeki64((f), (p), (w))
50 # ifdef stat
51 # undef stat
52 # endif
53
54 # define stat win32_stat
55
56 /*
57 * The POSIX definition for the stat() function uses a struct of the
58 * same name (struct stat), that why it takes this extra effort for
59 * redirecting/replacing the stat() function with our own one which
60 * is capable to handle long path names on Windows.
61 * The struct below roughly follows the POSIX definition. Time values
62 * are 64bit, but in cases when _USE_32BIT_TIME_T is defined, they
63 * will be set to values no larger than INT32_MAX which corresponds
64 * to file times up to the year 2038.
65 */
66 struct win32_stat
67 {
68 _dev_t st_dev; /* ID of device containing file */
69 _ino_t st_ino; /* inode number */
70 unsigned short st_mode; /* protection */
71 short st_nlink; /* number of hard links */
72 short st_uid; /* user ID of owner */
73 short st_gid; /* group ID of owner */
74 _dev_t st_rdev; /* device ID (if special file) */
75 int64_t st_size; /* total size, in bytes */
76 int64_t st_atime; /* time of last access */
77 int64_t st_mtime; /* time of last modification */
78 int64_t st_ctime; /* time of last status change */
79 };
80
81 # ifdef fstat
82 # undef fstat
83 # endif
84 # define fstat win32_fstat
85 #endif /* defined(_WIN32) */
86
87
88 #ifdef __ANDROID__
89 # if HAVE_UNISTD_H
90 # include <unistd.h>
91 # endif
92 # ifdef lseek
93 # undef lseek
94 # endif
95 # define lseek(f,p,w) lseek64((f), (p), (w))
96 #endif
97
98 9592 static inline int is_dos_path(const char *path)
99 {
100 #if HAVE_DOS_PATHS
101 if (path[0] && path[1] == ':')
102 return 1;
103 #endif
104 9592 return 0;
105 }
106
107 #if defined(_WIN32)
108 #ifndef S_IRUSR
109 #define S_IRUSR S_IREAD
110 #endif
111 #ifndef S_IWUSR
112 #define S_IWUSR S_IWRITE
113 #endif
114 #endif
115
116 #if CONFIG_NETWORK
117 #if defined(_WIN32)
118 #define SHUT_RD SD_RECEIVE
119 #define SHUT_WR SD_SEND
120 #define SHUT_RDWR SD_BOTH
121 #else
122 #include <sys/socket.h>
123 #if !defined(SHUT_RD) /* OS/2, DJGPP */
124 #define SHUT_RD 0
125 #define SHUT_WR 1
126 #define SHUT_RDWR 2
127 #endif
128 #endif
129
130 #if !HAVE_SOCKLEN_T
131 typedef int socklen_t;
132 #endif
133
134 /* most of the time closing a socket is just closing an fd */
135 #if !HAVE_CLOSESOCKET
136 #define closesocket close
137 #endif
138
139 #if !HAVE_POLL_H
140 typedef unsigned long nfds_t;
141
142 #if HAVE_WINSOCK2_H
143 #include <winsock2.h>
144 #endif
145 #if !HAVE_STRUCT_POLLFD
146 struct pollfd {
147 int fd;
148 short events; /* events to look for */
149 short revents; /* events that occurred */
150 };
151
152 /* events & revents */
153 #define POLLIN 0x0001 /* any readable data available */
154 #define POLLOUT 0x0002 /* file descriptor is writeable */
155 #define POLLRDNORM POLLIN
156 #define POLLWRNORM POLLOUT
157 #define POLLRDBAND 0x0008 /* priority readable data */
158 #define POLLWRBAND 0x0010 /* priority data can be written */
159 #define POLLPRI 0x0020 /* high priority readable data */
160
161 /* revents only */
162 #define POLLERR 0x0004 /* errors pending */
163 #define POLLHUP 0x0080 /* disconnected */
164 #define POLLNVAL 0x1000 /* invalid file descriptor */
165 #endif
166
167
168 int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout);
169 #define poll ff_poll
170 #endif /* HAVE_POLL_H */
171 #endif /* CONFIG_NETWORK */
172
173 #ifdef _WIN32
174 #include <stdio.h>
175 #include <windows.h>
176 #include "libavutil/wchar_filename.h"
177
178 #define DEF_FS_FUNCTION(name, wfunc, afunc) \
179 static inline int win32_##name(const char *filename_utf8) \
180 { \
181 wchar_t *filename_w; \
182 int ret; \
183 \
184 if (get_extended_win32_path(filename_utf8, &filename_w)) \
185 return -1; \
186 if (!filename_w) \
187 goto fallback; \
188 \
189 ret = wfunc(filename_w); \
190 av_free(filename_w); \
191 return ret; \
192 \
193 fallback: \
194 /* filename may be be in CP_ACP */ \
195 return afunc(filename_utf8); \
196 }
197
198 DEF_FS_FUNCTION(unlink, _wunlink, _unlink)
199 DEF_FS_FUNCTION(mkdir, _wmkdir, _mkdir)
200 DEF_FS_FUNCTION(rmdir, _wrmdir , _rmdir)
201
202 static inline int win32_access(const char *filename_utf8, int mode)
203 {
204 wchar_t *filename_w;
205 int ret;
206 if (get_extended_win32_path(filename_utf8, &filename_w))
207 return -1;
208 if (!filename_w)
209 goto fallback;
210 ret = _waccess(filename_w, mode);
211 av_free(filename_w);
212 return ret;
213 fallback:
214 return _access(filename_utf8, mode);
215 }
216
217 static inline void copy_stat(struct _stat64 *crtstat, struct win32_stat *buf)
218 {
219 buf->st_dev = crtstat->st_dev;
220 buf->st_ino = crtstat->st_ino;
221 buf->st_mode = crtstat->st_mode;
222 buf->st_nlink = crtstat->st_nlink;
223 buf->st_uid = crtstat->st_uid;
224 buf->st_gid = crtstat->st_gid;
225 buf->st_rdev = crtstat->st_rdev;
226 buf->st_size = crtstat->st_size;
227 buf->st_atime = crtstat->st_atime;
228 buf->st_mtime = crtstat->st_mtime;
229 buf->st_ctime = crtstat->st_ctime;
230 }
231
232 static inline int win32_stat(const char *filename_utf8, struct win32_stat *buf)
233 {
234 struct _stat64 crtstat = { 0 };
235 wchar_t *filename_w;
236 int ret;
237
238 if (get_extended_win32_path(filename_utf8, &filename_w))
239 return -1;
240
241 if (filename_w) {
242 ret = _wstat64(filename_w, &crtstat);
243 av_free(filename_w);
244 } else
245 ret = _stat64(filename_utf8, &crtstat);
246
247 copy_stat(&crtstat, buf);
248
249 return ret;
250 }
251
252 static inline int win32_fstat(int fd, struct win32_stat *buf)
253 {
254 struct _stat64 crtstat = { 0 };
255 int ret;
256
257 ret = _fstat64(fd, &crtstat);
258
259 copy_stat(&crtstat, buf);
260
261 return ret;
262 }
263
264 static inline int win32_rename(const char *src_utf8, const char *dest_utf8)
265 {
266 wchar_t *src_w, *dest_w;
267 int ret;
268
269 if (get_extended_win32_path(src_utf8, &src_w))
270 return -1;
271 if (get_extended_win32_path(dest_utf8, &dest_w)) {
272 av_free(src_w);
273 return -1;
274 }
275 if (!src_w || !dest_w) {
276 av_free(src_w);
277 av_free(dest_w);
278 goto fallback;
279 }
280
281 ret = MoveFileExW(src_w, dest_w, MOVEFILE_REPLACE_EXISTING);
282 av_free(src_w);
283 av_free(dest_w);
284 // Lacking proper mapping from GetLastError() error codes to errno codes
285 if (ret)
286 errno = EPERM;
287 return ret;
288
289 fallback:
290 /* filename may be be in CP_ACP */
291 #if !HAVE_UWP
292 ret = MoveFileExA(src_utf8, dest_utf8, MOVEFILE_REPLACE_EXISTING);
293 if (ret)
294 errno = EPERM;
295 #else
296 /* Windows Phone doesn't have MoveFileExA, and for Windows Store apps,
297 * it is available but not allowed by the app certification kit. However,
298 * it's unlikely that anybody would input filenames in CP_ACP there, so this
299 * fallback is kept mostly for completeness. Alternatively we could
300 * do MultiByteToWideChar(CP_ACP) and use MoveFileExW, but doing
301 * explicit conversions with CP_ACP is allegedly forbidden in windows
302 * store apps (or windows phone), and the notion of a native code page
303 * doesn't make much sense there. */
304 ret = rename(src_utf8, dest_utf8);
305 #endif
306 return ret;
307 }
308
309 #define mkdir(a, b) win32_mkdir(a)
310 #define rename win32_rename
311 #define rmdir win32_rmdir
312 #define unlink win32_unlink
313 #define access win32_access
314
315 #endif
316
317 #endif /* AVFORMAT_OS_SUPPORT_H */
318