| ! { dg-do run } |
| |
| PROGRAM test_fseek |
| INTEGER, PARAMETER :: SEEK_SET = 0, SEEK_CUR = 1, SEEK_END = 2, fd=10 |
| INTEGER :: ierr = 0 |
| INTEGER :: newline_length |
| |
| ! We first need to determine if a newline is one or two characters |
| open (911,status="scratch") |
| write(911,"()") |
| newline_length = ftell(911) |
| close (911) |
| if (newline_length < 1 .or. newline_length > 2) STOP 1 |
| |
| open(fd, status="scratch") |
| ! expected position: one leading blank + 10 + newline |
| WRITE(fd, *) "1234567890" |
| IF (FTELL(fd) /= 11 + newline_length) STOP 2 |
| |
| ! move backward from current position |
| CALL FSEEK(fd, -11 - newline_length, SEEK_CUR, ierr) |
| IF (ierr /= 0 .OR. FTELL(fd) /= 0) STOP 3 |
| |
| ! move to negative position (error) |
| CALL FSEEK(fd, -1, SEEK_SET, ierr) |
| IF (ierr == 0 .OR. FTELL(fd) /= 0) STOP 4 |
| |
| ! move forward from end (11 + 10 + newline) |
| CALL FSEEK(fd, 10, SEEK_END, ierr) |
| IF (ierr /= 0 .OR. FTELL(fd) /= 21 + newline_length) STOP 5 |
| |
| ! set position (0) |
| CALL FSEEK(fd, 0, SEEK_SET, ierr) |
| IF (ierr /= 0 .OR. FTELL(fd) /= 0) STOP 6 |
| |
| ! move forward from current position |
| CALL FSEEK(fd, 5, SEEK_CUR, ierr) |
| IF (ierr /= 0 .OR. FTELL(fd) /= 5) STOP 7 |
| |
| CALL FSEEK(fd, HUGE(0_1), SEEK_SET, ierr) |
| IF (ierr /= 0 .OR. FTELL(fd) /= HUGE(0_1)) STOP 8 |
| |
| CALL FSEEK(fd, HUGE(0_2), SEEK_SET, ierr) |
| IF (ierr /= 0 .OR. FTELL(fd) /= HUGE(0_2)) STOP 9 |
| |
| CALL FSEEK(fd, HUGE(0_4), SEEK_SET, ierr) |
| IF (ierr /= 0 .OR. FTELL(fd) /= HUGE(0_4)) STOP 10 |
| |
| CALL FSEEK(fd, -HUGE(0_4), SEEK_CUR, ierr) |
| IF (ierr /= 0 .OR. FTELL(fd) /= 0) STOP 11 |
| END PROGRAM |
| |
