diff options
Diffstat (limited to 'cpukit/libfs/src/dosfs/fat_file.h')
| -rw-r--r-- | cpukit/libfs/src/dosfs/fat_file.h | 62 |
1 files changed, 31 insertions, 31 deletions
diff --git a/cpukit/libfs/src/dosfs/fat_file.h b/cpukit/libfs/src/dosfs/fat_file.h index b16b9b370f..fcde2e620e 100644 --- a/cpukit/libfs/src/dosfs/fat_file.h +++ b/cpukit/libfs/src/dosfs/fat_file.h @@ -24,10 +24,10 @@ extern "C" { #include <time.h> -/* "fat-file" representation - * - * the idea is: fat-file is nothing but a cluster chain, any open fat-file is - * represented in system by fat-file descriptor and has well-known +/* "fat-file" representation + * + * the idea is: fat-file is nothing but a cluster chain, any open fat-file is + * represented in system by fat-file descriptor and has well-known * file interface: * * fat_file_open() @@ -35,10 +35,10 @@ extern "C" { * fat_file_read() * fat_file_write() * - * Such interface hides the architecture of fat-file and represents it like + * Such interface hides the architecture of fat-file and represents it like * linear file */ - + typedef rtems_filesystem_node_types_t fat_file_type_t; #define FAT_DIRECTORY RTEMS_FILESYSTEM_DIRECTORY @@ -50,34 +50,34 @@ typedef struct fat_file_map_s uint32_t disk_cln; uint32_t last_cln; } fat_file_map_t; -/* - * descriptor of a fat-file +/* + * descriptor of a fat-file * - * To each particular clusters chain + * To each particular clusters chain */ typedef struct fat_file_fd_s { - Chain_Node link; /* + Chain_Node link; /* * fat-file descriptors organized into hash; - * collision lists are handled via link + * collision lists are handled via link * field */ - uint32_t links_num; /* - * the number of fat_file_open call on + uint32_t links_num; /* + * the number of fat_file_open call on * this fat-file */ - uint32_t ino; /* inode, file serial number :)))) */ + uint32_t ino; /* inode, file serial number :)))) */ fat_file_type_t fat_file_type; uint32_t size_limit; uint32_t fat_file_size; /* length */ uint32_t info_cln; uint32_t cln; - uint16_t info_ofs; + uint16_t info_ofs; unsigned char first_char; uint8_t flags; fat_file_map_t map; time_t mtime; - + } fat_file_fd_t; @@ -89,16 +89,16 @@ typedef struct fat_file_fd_s /* ioctl macros */ #define F_CLU_NUM 0x01 -/* - * Each file and directory on a MSDOS volume is unique identified by it - * location, i.e. location of it 32 Bytes Directory Entry Structure. We can - * distinguish them by cluster number it locates on and offset inside this +/* + * Each file and directory on a MSDOS volume is unique identified by it + * location, i.e. location of it 32 Bytes Directory Entry Structure. We can + * distinguish them by cluster number it locates on and offset inside this * cluster. But root directory on any volumes (FAT12/16/32) has no 32 Bytes * Directory Entry Structure corresponded to it. So we assume 32 Bytes * Directory Entry Structure of root directory locates at cluster 1 (invalid * cluaster number) and offset 0 */ -#define FAT_ROOTDIR_CLUSTER_NUM 0x01 +#define FAT_ROOTDIR_CLUSTER_NUM 0x01 #define FAT_FD_OF_ROOT_DIR(fat_fd) \ ((fat_fd->info_cln == FAT_ROOTDIR_CLUSTER_NUM ) && \ @@ -108,7 +108,7 @@ typedef struct fat_file_fd_s /* fat_construct_key -- * Construct key for hash access: convert (cluster num, offset) to - * (sector512 num, new offset) and than construct key as + * (sector512 num, new offset) and than construct key as * key = (sector512 num) << 4 | (new offset) * * PARAMETERS: @@ -119,28 +119,28 @@ typedef struct fat_file_fd_s * RETURNS: * constructed key */ -static inline uint32_t +static inline uint32_t fat_construct_key( rtems_filesystem_mount_table_entry_t *mt_entry, - uint32_t cl, + uint32_t cl, uint32_t ofs) { - return ( ((fat_cluster_num_to_sector512_num(mt_entry, cl) + - (ofs >> FAT_SECTOR512_BITS)) << 4) + + return ( ((fat_cluster_num_to_sector512_num(mt_entry, cl) + + (ofs >> FAT_SECTOR512_BITS)) << 4) + ((ofs >> 5) & (FAT_DIRENTRIES_PER_SEC512 - 1)) ); } /* Prototypes for "fat-file" operations */ -int +int fat_file_open(rtems_filesystem_mount_table_entry_t *mt_entry, - uint32_t cln, + uint32_t cln, uint32_t ofs, fat_file_fd_t **fat_fd); int fat_file_reopen(fat_file_fd_t *fat_fd); -int +int fat_file_close(rtems_filesystem_mount_table_entry_t *mt_entry, fat_file_fd_t *fat_fd); @@ -168,11 +168,11 @@ int fat_file_truncate(rtems_filesystem_mount_table_entry_t *mt_entry, fat_file_fd_t *fat_fd, uint32_t new_length); - + int fat_file_datasync(rtems_filesystem_mount_table_entry_t *mt_entry, fat_file_fd_t *fat_fd); - + int fat_file_ioctl(rtems_filesystem_mount_table_entry_t *mt_entry, |