libavformat/os_support.h

   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 #  ifdef lseek
  46 #   undef lseek
  47 #  endif
  48 #  define lseek(f,p,w) _lseeki64((f), (p), (w))
  49 #  ifdef stat
  50 #   undef stat
  51 #  endif
  52 #  define stat _stati64
  53 #  ifdef fstat
  54 #   undef fstat
  55 #  endif
  56 #  define fstat(f,s) _fstati64((f), (s))
  57 #endif /* defined(_WIN32) */
  58
  59
  60 #ifdef __ANDROID__
  61 #  if HAVE_UNISTD_H
  62 #    include <unistd.h>
  63 #  endif
  64 #  ifdef lseek
  65 #   undef lseek
  66 #  endif
  67 #  define lseek(f,p,w) lseek64((f), (p), (w))
  68 #endif
  69
  70 static inline int is_dos_path(const char *path)
  71 {
  72 #if HAVE_DOS_PATHS
  73     if (path[0] && path[1] == ':')
  74         return 1;
  75 #endif
  76     return 0;
  77 }
  78
  79 #if defined(_WIN32)
  80 #ifndef S_IRUSR
  81 #define S_IRUSR S_IREAD
  82 #endif
  83 #ifndef S_IWUSR
  84 #define S_IWUSR S_IWRITE
  85 #endif
  86 #endif
  87
  88 #if CONFIG_NETWORK
  89 #if defined(_WIN32)
  90 #define SHUT_RD SD_RECEIVE
  91 #define SHUT_WR SD_SEND
  92 #define SHUT_RDWR SD_BOTH
  93 #else
  94 #include <sys/socket.h>
  95 #if !defined(SHUT_RD) /* OS/2, DJGPP */
  96 #define SHUT_RD 0
  97 #define SHUT_WR 1
  98 #define SHUT_RDWR 2
  99 #endif
 100 #endif
 101
 102 #if !HAVE_SOCKLEN_T
 103 typedef int socklen_t;
 104 #endif
 105
 106 /* most of the time closing a socket is just closing an fd */
 107 #if !HAVE_CLOSESOCKET
 108 #define closesocket close
 109 #endif
 110
 111 #if !HAVE_POLL_H
 112 typedef unsigned long nfds_t;
 113
 114 #if HAVE_WINSOCK2_H
 115 #include <winsock2.h>
 116 #endif
 117 #if !HAVE_STRUCT_POLLFD
 118 struct pollfd {
 119     int fd;
 120     short events;  /* events to look for */
 121     short revents; /* events that occurred */
 122 };
 123
 124 /* events & revents */
 125 #define POLLIN     0x0001  /* any readable data available */
 126 #define POLLOUT    0x0002  /* file descriptor is writeable */
 127 #define POLLRDNORM POLLIN
 128 #define POLLWRNORM POLLOUT
 129 #define POLLRDBAND 0x0008  /* priority readable data */
 130 #define POLLWRBAND 0x0010  /* priority data can be written */
 131 #define POLLPRI    0x0020  /* high priority readable data */
 132
 133 /* revents only */
 134 #define POLLERR    0x0004  /* errors pending */
 135 #define POLLHUP    0x0080  /* disconnected */
 136 #define POLLNVAL   0x1000  /* invalid file descriptor */
 137 #endif
 138
 139
 140 int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout);
 141 #define poll ff_poll
 142 #endif /* HAVE_POLL_H */
 143 #endif /* CONFIG_NETWORK */
 144
 145 #ifdef _WIN32
 146 #include <stdio.h>
 147 #include <windows.h>
 148 #include "libavutil/wchar_filename.h"
 149
 150 #define DEF_FS_FUNCTION(name, wfunc, afunc)               \
 151 static inline int win32_##name(const char *filename_utf8) \
 152 {                                                         \
 153     wchar_t *filename_w;                                  \
 154     int ret;                                              \
 155                                                           \
 156     if (utf8towchar(filename_utf8, &filename_w))          \
 157         return -1;                                        \
 158     if (!filename_w)                                      \
 159         goto fallback;                                    \
 160                                                           \
 161     ret = wfunc(filename_w);                              \
 162     av_free(filename_w);                                  \
 163     return ret;                                           \
 164                                                           \
 165 fallback:                                                 \
 166     /* filename may be be in CP_ACP */                    \
 167     return afunc(filename_utf8);                          \
 168 }
 169
 170 DEF_FS_FUNCTION(unlink, _wunlink, _unlink)
 171 DEF_FS_FUNCTION(mkdir,  _wmkdir,  _mkdir)
 172 DEF_FS_FUNCTION(rmdir,  _wrmdir , _rmdir)
 173
 174 #define DEF_FS_FUNCTION2(name, wfunc, afunc, partype)     \
 175 static inline int win32_##name(const char *filename_utf8, partype par) \
 176 {                                                         \
 177     wchar_t *filename_w;                                  \
 178     int ret;                                              \
 179                                                           \
 180     if (utf8towchar(filename_utf8, &filename_w))          \
 181         return -1;                                        \
 182     if (!filename_w)                                      \
 183         goto fallback;                                    \
 184                                                           \
 185     ret = wfunc(filename_w, par);                         \
 186     av_free(filename_w);                                  \
 187     return ret;                                           \
 188                                                           \
 189 fallback:                                                 \
 190     /* filename may be be in CP_ACP */                    \
 191     return afunc(filename_utf8, par);                     \
 192 }
 193
 194 DEF_FS_FUNCTION2(access, _waccess, _access, int)
 195 DEF_FS_FUNCTION2(stat, _wstati64, _stati64, struct stat*)
 196
 197 static inline int win32_rename(const char *src_utf8, const char *dest_utf8)
 198 {
 199     wchar_t *src_w, *dest_w;
 200     int ret;
 201
 202     if (utf8towchar(src_utf8, &src_w))
 203         return -1;
 204     if (utf8towchar(dest_utf8, &dest_w)) {
 205         av_free(src_w);
 206         return -1;
 207     }
 208     if (!src_w || !dest_w) {
 209         av_free(src_w);
 210         av_free(dest_w);
 211         goto fallback;
 212     }
 213
 214     ret = MoveFileExW(src_w, dest_w, MOVEFILE_REPLACE_EXISTING);
 215     av_free(src_w);
 216     av_free(dest_w);
 217     // Lacking proper mapping from GetLastError() error codes to errno codes
 218     if (ret)
 219         errno = EPERM;
 220     return ret;
 221
 222 fallback:
 223     /* filename may be be in CP_ACP */
 224 #if !HAVE_UWP
 225     ret = MoveFileExA(src_utf8, dest_utf8, MOVEFILE_REPLACE_EXISTING);
 226     if (ret)
 227         errno = EPERM;
 228 #else
 229     /* Windows Phone doesn't have MoveFileExA, and for Windows Store apps,
 230      * it is available but not allowed by the app certification kit. However,
 231      * it's unlikely that anybody would input filenames in CP_ACP there, so this
 232      * fallback is kept mostly for completeness. Alternatively we could
 233      * do MultiByteToWideChar(CP_ACP) and use MoveFileExW, but doing
 234      * explicit conversions with CP_ACP is allegedly forbidden in windows
 235      * store apps (or windows phone), and the notion of a native code page
 236      * doesn't make much sense there. */
 237     ret = rename(src_utf8, dest_utf8);
 238 #endif
 239     return ret;
 240 }
 241
 242 #define mkdir(a, b) win32_mkdir(a)
 243 #define rename      win32_rename
 244 #define rmdir       win32_rmdir
 245 #define unlink      win32_unlink
 246 #define access      win32_access
 247
 248 #endif
 249
 250 #endif /* AVFORMAT_OS_SUPPORT_H */