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FFmpeg/libavformat/os_support.h

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/*
* various OS-feature replacement utilities
* copyright (c) 2000, 2001, 2002 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFORMAT_OS_SUPPORT_H
#define AVFORMAT_OS_SUPPORT_H
/**
* @file
* miscellaneous OS support macros and functions.
*/
#include "config.h"
#include <sys/stat.h>
#ifdef _WIN32
#if HAVE_DIRECT_H
#include <direct.h>
#endif
#if HAVE_IO_H
#include <io.h>
#endif
#endif
#ifdef _WIN32
# include <fcntl.h>
# ifdef lseek
# undef lseek
# endif
# define lseek(f,p,w) _lseeki64((f), (p), (w))
# ifdef stat
# undef stat
# endif
# define stat win32_stat
/*
* The POSIX definition for the stat() function uses a struct of the
* same name (struct stat), that why it takes this extra effort for
* redirecting/replacing the stat() function with our own one which
* is capable to handle long path names on Windows.
* The struct below roughly follows the POSIX definition. Time values
* are 64bit, but in cases when _USE_32BIT_TIME_T is defined, they
* will be set to values no larger than INT32_MAX which corresponds
* to file times up to the year 2038.
*/
struct win32_stat
{
_dev_t st_dev; /* ID of device containing file */
_ino_t st_ino; /* inode number */
unsigned short st_mode; /* protection */
short st_nlink; /* number of hard links */
short st_uid; /* user ID of owner */
short st_gid; /* group ID of owner */
_dev_t st_rdev; /* device ID (if special file) */
int64_t st_size; /* total size, in bytes */
int64_t st_atime; /* time of last access */
int64_t st_mtime; /* time of last modification */
int64_t st_ctime; /* time of last status change */
};
# ifdef fstat
# undef fstat
# endif
# define fstat win32_fstat
#endif /* defined(_WIN32) */
#ifdef __ANDROID__
# if HAVE_UNISTD_H
# include <unistd.h>
# endif
# ifdef lseek
# undef lseek
# endif
# define lseek(f,p,w) lseek64((f), (p), (w))
#endif
static inline int is_dos_path(const char *path)
{
#if HAVE_DOS_PATHS
if (path[0] && path[1] == ':')
return 1;
#endif
return 0;
}
#if defined(_WIN32)
#ifndef S_IRUSR
#define S_IRUSR S_IREAD
#endif
#ifndef S_IWUSR
#define S_IWUSR S_IWRITE
#endif
#endif
#if CONFIG_NETWORK
#if defined(_WIN32)
#define SHUT_RD SD_RECEIVE
#define SHUT_WR SD_SEND
#define SHUT_RDWR SD_BOTH
#else
#include <sys/socket.h>
#if !defined(SHUT_RD) /* OS/2, DJGPP */
#define SHUT_RD 0
#define SHUT_WR 1
#define SHUT_RDWR 2
#endif
#endif
#if !HAVE_SOCKLEN_T
typedef int socklen_t;
#endif
/* most of the time closing a socket is just closing an fd */
#if !HAVE_CLOSESOCKET
#define closesocket close
#endif
#if !HAVE_POLL_H
typedef unsigned long nfds_t;
#if HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
#if !HAVE_STRUCT_POLLFD
struct pollfd {
int fd;
short events; /* events to look for */
short revents; /* events that occurred */
};
/* events & revents */
#define POLLIN 0x0001 /* any readable data available */
#define POLLOUT 0x0002 /* file descriptor is writeable */
#define POLLRDNORM POLLIN
#define POLLWRNORM POLLOUT
#define POLLRDBAND 0x0008 /* priority readable data */
#define POLLWRBAND 0x0010 /* priority data can be written */
#define POLLPRI 0x0020 /* high priority readable data */
/* revents only */
#define POLLERR 0x0004 /* errors pending */
#define POLLHUP 0x0080 /* disconnected */
#define POLLNVAL 0x1000 /* invalid file descriptor */
#endif
int ff_poll(struct pollfd *fds, nfds_t numfds, int timeout);
#define poll ff_poll
#endif /* HAVE_POLL_H */
#endif /* CONFIG_NETWORK */
#ifdef _WIN32
#include <stdio.h>
#include <windows.h>
#include "libavutil/wchar_filename.h"
#define DEF_FS_FUNCTION(name, wfunc, afunc) \
static inline int win32_##name(const char *filename_utf8) \
{ \
wchar_t *filename_w; \
int ret; \
\
if (get_extended_win32_path(filename_utf8, &filename_w)) \
return -1; \
if (!filename_w) \
goto fallback; \
\
ret = wfunc(filename_w); \
av_free(filename_w); \
return ret; \
\
fallback: \
/* filename may be be in CP_ACP */ \
return afunc(filename_utf8); \
}
DEF_FS_FUNCTION(unlink, _wunlink, _unlink)
DEF_FS_FUNCTION(mkdir, _wmkdir, _mkdir)
DEF_FS_FUNCTION(rmdir, _wrmdir , _rmdir)
static inline int win32_access(const char *filename_utf8, int mode)
{
wchar_t *filename_w;
int ret;
if (get_extended_win32_path(filename_utf8, &filename_w))
return -1;
if (!filename_w)
goto fallback;
ret = _waccess(filename_w, mode);
av_free(filename_w);
return ret;
fallback:
return _access(filename_utf8, mode);
}
static inline void copy_stat(struct _stat64 *crtstat, struct win32_stat *buf)
{
buf->st_dev = crtstat->st_dev;
buf->st_ino = crtstat->st_ino;
buf->st_mode = crtstat->st_mode;
buf->st_nlink = crtstat->st_nlink;
buf->st_uid = crtstat->st_uid;
buf->st_gid = crtstat->st_gid;
buf->st_rdev = crtstat->st_rdev;
buf->st_size = crtstat->st_size;
buf->st_atime = crtstat->st_atime;
buf->st_mtime = crtstat->st_mtime;
buf->st_ctime = crtstat->st_ctime;
}
static inline int win32_stat(const char *filename_utf8, struct win32_stat *buf)
{
struct _stat64 crtstat = { 0 };
wchar_t *filename_w;
int ret;
if (get_extended_win32_path(filename_utf8, &filename_w))
return -1;
if (filename_w) {
ret = _wstat64(filename_w, &crtstat);
av_free(filename_w);
} else
ret = _stat64(filename_utf8, &crtstat);
copy_stat(&crtstat, buf);
return ret;
}
static inline int win32_fstat(int fd, struct win32_stat *buf)
{
struct _stat64 crtstat = { 0 };
int ret;
ret = _fstat64(fd, &crtstat);
copy_stat(&crtstat, buf);
return ret;
}
static inline int win32_rename(const char *src_utf8, const char *dest_utf8)
{
wchar_t *src_w, *dest_w;
int ret;
if (get_extended_win32_path(src_utf8, &src_w))
return -1;
if (get_extended_win32_path(dest_utf8, &dest_w)) {
av_free(src_w);
return -1;
}
if (!src_w || !dest_w) {
av_free(src_w);
av_free(dest_w);
goto fallback;
}
ret = MoveFileExW(src_w, dest_w, MOVEFILE_REPLACE_EXISTING);
av_free(src_w);
av_free(dest_w);
// Lacking proper mapping from GetLastError() error codes to errno codes
if (ret)
errno = EPERM;
return ret;
fallback:
/* filename may be be in CP_ACP */
#if !HAVE_UWP
ret = MoveFileExA(src_utf8, dest_utf8, MOVEFILE_REPLACE_EXISTING);
if (ret)
errno = EPERM;
#else
/* Windows Phone doesn't have MoveFileExA, and for Windows Store apps,
* it is available but not allowed by the app certification kit. However,
* it's unlikely that anybody would input filenames in CP_ACP there, so this
* fallback is kept mostly for completeness. Alternatively we could
* do MultiByteToWideChar(CP_ACP) and use MoveFileExW, but doing
* explicit conversions with CP_ACP is allegedly forbidden in windows
* store apps (or windows phone), and the notion of a native code page
* doesn't make much sense there. */
ret = rename(src_utf8, dest_utf8);
#endif
return ret;
}
#define mkdir(a, b) win32_mkdir(a)
#define rename win32_rename
#define rmdir win32_rmdir
#define unlink win32_unlink
#define access win32_access
#endif
#endif /* AVFORMAT_OS_SUPPORT_H */