| 32,19 → 32,20 |
|---|
| * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, |
| * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** @addtogroup FileSystemImpl |
| * @{ |
| */ |
| |
| /** |
| * @file utility.c |
| * @brief This is the master header for fs. It includes some other files |
| * and defines the principal constants. |
| */ |
| |
| |
| /* This file contains a few general purpose utility routines. */ |
| |
| /* Methods: |
| * fetch_name: go get a path name from user space |
| * no_sys: reject a system call that FS does not handle |
| * conv2: does byte swapping on a 16-bit int |
| * conv4: does byte swapping on a 32-bit long |
| * fs_strncmp: same like strncmp |
| */ |
| |
| |
| #include <unistd.h> |
| #include "fs.h" |
| #include "block.h" |
| 52,7 → 53,9 |
|---|
| #include "fproc.h" |
| #include "inode.h" |
| |
| |
| /** |
| * Go get a path name from user space |
| */ |
| int fetch_name(char* path, int len) |
| { |
| |
| 78,7 → 81,10 |
|---|
| |
| return OK; |
| } |
| |
| |
| /** |
| * Reject a system call that FS does not handle |
| */ |
| int no_sys() |
| { |
| |
| 86,9 → 92,12 |
|---|
| |
| print_console("FS_NOSYS called, illegal system call number!\n"); |
| |
| return FS_EINVAL; |
| re\turn FS_EINVAL; |
| } |
| |
| |
| /** |
| * Does byte swapping on a 16-bit int |
| */ |
| unsigned conv2(int norm, int w) |
| { |
| |
| 100,6 → 109,9 |
|---|
| return(((w&BYTE) << 8) | ( (w>>8) & BYTE)); |
| } |
| |
| /** |
| * Does byte swapping on a 32-bit long |
| */ |
| long conv4(int norm, long x) |
| { |
| |
| 118,6 → 130,9 |
|---|
| return l; |
| } |
| |
| /** |
| * Same like strncmp |
| */ |
| int fs_strncmp(const char *src, const char *dst, size_t len) |
| { |
| |
| 144,3 → 159,8 |
|---|
| |
| return 0; |
| } |
| |
| /** |
| * } |
| */ |
| |