From bc8f1bbe233b435dc474df272dac0b5b6d0ef536 Mon Sep 17 00:00:00 2001 From: softworkz Date: Thu, 26 May 2022 09:28:49 +0000 Subject: [PATCH] avformat/os_support: Support long file names on Windows MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Signed-off-by: softworkz Signed-off-by: Martin Storsjö --- libavformat/os_support.h | 116 ++++++++++++++++++++++++++++++--------- 1 file changed, 91 insertions(+), 25 deletions(-) diff --git a/libavformat/os_support.h b/libavformat/os_support.h index 5e6b32d2dc..958976cc6f 100644 --- a/libavformat/os_support.h +++ b/libavformat/os_support.h @@ -49,11 +49,38 @@ # ifdef stat # undef stat # endif -# define stat _stati64 + +# 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(f,s) _fstati64((f), (s)) +# define fstat win32_fstat #endif /* defined(_WIN32) */ @@ -153,7 +180,7 @@ static inline int win32_##name(const char *filename_utf8) \ wchar_t *filename_w; \ int ret; \ \ - if (utf8towchar(filename_utf8, &filename_w)) \ + if (get_extended_win32_path(filename_utf8, &filename_w)) \ return -1; \ if (!filename_w) \ goto fallback; \ @@ -171,37 +198,76 @@ DEF_FS_FUNCTION(unlink, _wunlink, _unlink) DEF_FS_FUNCTION(mkdir, _wmkdir, _mkdir) DEF_FS_FUNCTION(rmdir, _wrmdir , _rmdir) -#define DEF_FS_FUNCTION2(name, wfunc, afunc, partype) \ -static inline int win32_##name(const char *filename_utf8, partype par) \ -{ \ - wchar_t *filename_w; \ - int ret; \ - \ - if (utf8towchar(filename_utf8, &filename_w)) \ - return -1; \ - if (!filename_w) \ - goto fallback; \ - \ - ret = wfunc(filename_w, par); \ - av_free(filename_w); \ - return ret; \ - \ -fallback: \ - /* filename may be be in CP_ACP */ \ - return afunc(filename_utf8, par); \ +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); } -DEF_FS_FUNCTION2(access, _waccess, _access, int) -DEF_FS_FUNCTION2(stat, _wstati64, _stati64, struct stat*) +static inline void copy_stat(struct _stati64 *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 _stati64 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 _stati64 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 (utf8towchar(src_utf8, &src_w)) + if (get_extended_win32_path(src_utf8, &src_w)) return -1; - if (utf8towchar(dest_utf8, &dest_w)) { + if (get_extended_win32_path(dest_utf8, &dest_w)) { av_free(src_w); return -1; }