Alexandre Julliard : ntdll: Make the various directory info size functions depend on the info class.
Module: wine Branch: master Commit: 551ddfe4028f5b63ddda703956a1132a59def666 URL: http://source.winehq.org/git/wine.git/?a=commit;h=551ddfe4028f5b63ddda703956... Author: Alexandre Julliard <julliard(a)winehq.org> Date: Wed Nov 18 17:54:06 2009 +0100 ntdll: Make the various directory info size functions depend on the info class. --- dlls/ntdll/directory.c | 47 ++++++++++++++++++++++++++++++----------------- 1 files changed, 30 insertions(+), 17 deletions(-) diff --git a/dlls/ntdll/directory.c b/dlls/ntdll/directory.c index ef5b17e..602b08c 100644 --- a/dlls/ntdll/directory.c +++ b/dlls/ntdll/directory.c @@ -154,8 +154,6 @@ union file_directory_info FILE_BOTH_DIRECTORY_INFORMATION both; }; -static const unsigned int max_dir_info_size = FIELD_OFFSET( FILE_BOTH_DIR_INFORMATION, FileName[MAX_DIR_ENTRY_LEN] ); - static int show_dot_files = -1; /* at some point we may want to allow Winelib apps to set this */ @@ -221,6 +219,23 @@ static inline BOOL is_ignored_file( const struct stat *st ) return FALSE; } +static inline unsigned int dir_info_size( FILE_INFORMATION_CLASS class, unsigned int len ) +{ + switch (class) + { + case FileBothDirectoryInformation: + return (FIELD_OFFSET( FILE_BOTH_DIR_INFORMATION, FileName[len] ) + 3) & ~3; + default: + assert(0); + } +} + +static inline unsigned int max_dir_info_size( FILE_INFORMATION_CLASS class ) +{ + return dir_info_size( class, MAX_DIR_ENTRY_LEN ); +} + + /*********************************************************************** * get_default_com_device * @@ -990,7 +1005,7 @@ static union file_directory_info *append_entry( void *info_ptr, IO_STATUS_BLOCK if (!show_dot_files && long_name[0] == '.' && long_name[1] && (long_name[1] != '.' || long_name[2])) attributes |= FILE_ATTRIBUTE_HIDDEN; - total_len = (FIELD_OFFSET(FILE_BOTH_DIR_INFORMATION, FileName[long_len]) + 3) & ~3; + total_len = dir_info_size( class, long_len ); if (io->Information + total_len > max_length) { total_len = max_length - io->Information; @@ -1082,7 +1097,7 @@ static int read_directory_vfat( int fd, IO_STATUS_BLOCK *io, void *buffer, ULONG if (restart_scan) lseek( fd, 0, SEEK_SET ); - if (length < max_dir_info_size) /* we may have to return a partial entry here */ + if (length < max_dir_info_size(class)) /* we may have to return a partial entry here */ { off_t old_pos = lseek( fd, 0, SEEK_CUR ); @@ -1132,7 +1147,7 @@ static int read_directory_vfat( int fd, IO_STATUS_BLOCK *io, void *buffer, ULONG last_info = info; if (single_entry) break; /* check if we still have enough space for the largest possible entry */ - if (io->Information + max_dir_info_size > length) break; + if (io->Information + max_dir_info_size(class) > length) break; } if (ioctl( fd, VFAT_IOCTL_READDIR_BOTH, (long)de ) == -1) break; } @@ -1169,7 +1184,7 @@ static int read_directory_getdents( int fd, IO_STATUS_BLOCK *io, void *buffer, U } if (restart_scan) lseek( fd, 0, SEEK_SET ); - else if (length < max_dir_info_size) /* we may have to return a partial entry here */ + else if (length < max_dir_info_size(class)) /* we may have to return a partial entry here */ { old_pos = lseek( fd, 0, SEEK_CUR ); if (old_pos == -1 && errno == ENOENT) @@ -1209,8 +1224,7 @@ static int read_directory_getdents( int fd, IO_STATUS_BLOCK *io, void *buffer, U /* make sure we have enough room for both entries */ if (fake_dot_dot) { - static const ULONG min_info_size = (FIELD_OFFSET(FILE_BOTH_DIR_INFORMATION, FileName[1]) + - FIELD_OFFSET(FILE_BOTH_DIR_INFORMATION, FileName[2]) + 3) & ~3; + const ULONG min_info_size = dir_info_size( class, 1 ) + dir_info_size( class, 2 ); if (length < min_info_size || single_entry) { FIXME( "not enough room %u/%u for fake . and .. entries\n", length, single_entry ); @@ -1226,7 +1240,7 @@ static int read_directory_getdents( int fd, IO_STATUS_BLOCK *io, void *buffer, U last_info = info; /* check if we still have enough space for the largest possible entry */ - if (last_info && io->Information + max_dir_info_size > length) + if (last_info && io->Information + max_dir_info_size(class) > length) { lseek( fd, 0, SEEK_SET ); /* reset pos to first entry */ res = 0; @@ -1248,7 +1262,7 @@ static int read_directory_getdents( int fd, IO_STATUS_BLOCK *io, void *buffer, U break; } /* check if we still have enough space for the largest possible entry */ - if (single_entry || io->Information + max_dir_info_size > length) + if (single_entry || io->Information + max_dir_info_size(class) > length) { if (res > 0) lseek( fd, de->d_off, SEEK_SET ); /* set pos to next entry */ break; @@ -1372,8 +1386,7 @@ static int read_directory_getdirentries( int fd, IO_STATUS_BLOCK *io, void *buff /* make sure we have enough room for both entries */ if (fake_dot_dot) { - static const ULONG min_info_size = (FIELD_OFFSET(FILE_BOTH_DIR_INFORMATION, FileName[1]) + - FIELD_OFFSET(FILE_BOTH_DIR_INFORMATION, FileName[2]) + 3) & ~3; + const ULONG min_info_size = dir_info_size( class, 1 ) + dir_info_size( class, 2 ); if (length < min_info_size || single_entry) { FIXME( "not enough room %u/%u for fake . and .. entries\n", length, single_entry ); @@ -1392,7 +1405,7 @@ static int read_directory_getdirentries( int fd, IO_STATUS_BLOCK *io, void *buff restart_info_pos = io->Information; /* check if we still have enough space for the largest possible entry */ - if (last_info && io->Information + max_dir_info_size > length) + if (last_info && io->Information + max_dir_info_size(class) > length) { lseek( fd, 0, SEEK_SET ); /* reset pos to first entry */ res = 0; @@ -1426,7 +1439,7 @@ static int read_directory_getdirentries( int fd, IO_STATUS_BLOCK *io, void *buff goto restart; } /* if we have to return but the buffer contains more data, restart with a smaller size */ - if (res > 0 && (single_entry || io->Information + max_dir_info_size > length)) + if (res > 0 && (single_entry || io->Information + max_dir_info_size(class) > length)) { lseek( fd, (unsigned long)restart_pos, SEEK_SET ); size = (char *)de - data; @@ -1444,7 +1457,7 @@ static int read_directory_getdirentries( int fd, IO_STATUS_BLOCK *io, void *buff if (size < initial_size) break; /* already restarted once, give up now */ size = min( size, length - io->Information ); /* if size is too small don't bother to continue */ - if (size < max_dir_info_size && last_info) break; + if (size < max_dir_info_size(class) && last_info) break; restart_last_info = last_info; restart_info_pos = io->Information; restart: @@ -1530,7 +1543,7 @@ static void read_directory_readdir( int fd, IO_STATUS_BLOCK *io, void *buffer, U } if (single_entry) break; /* check if we still have enough space for the largest possible entry */ - if (io->Information + max_dir_info_size > length) break; + if (io->Information + max_dir_info_size(class) > length) break; } } @@ -1638,7 +1651,7 @@ NTSTATUS WINAPI NtQueryDirectoryFile( HANDLE handle, HANDLE event, switch (info_class) { case FileBothDirectoryInformation: - if (length < sizeof(FILE_BOTH_DIR_INFORMATION)) return io->u.Status = STATUS_INFO_LENGTH_MISMATCH; + if (length < dir_info_size( info_class, 1 )) return io->u.Status = STATUS_INFO_LENGTH_MISMATCH; break; default: FIXME( "Unsupported file info class %d\n", info_class );
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Alexandre Julliard