diff options
| author | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-02-28 09:12:13 +0100 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2017-02-28 09:31:04 +0100 |
| commit | f71ccc345e7347b5913d198a147af281351f9db1 (patch) | |
| tree | 9f8d032d5b5b8a121617bdc257c468944b800e5d /cpukit/libcsupport | |
| parent | termios09: Test send callback (diff) | |
| download | rtems-f71ccc345e7347b5913d198a147af281351f9db1.tar.bz2 | |
termios: Simplify some calculations
Use the modular arithmetic addition rule.
Diffstat (limited to 'cpukit/libcsupport')
| -rw-r--r-- | cpukit/libcsupport/src/termios.c | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/cpukit/libcsupport/src/termios.c b/cpukit/libcsupport/src/termios.c index d1058997f8..9eace2eeea 100644 --- a/cpukit/libcsupport/src/termios.c +++ b/cpukit/libcsupport/src/termios.c @@ -1533,8 +1533,7 @@ fillBufferQueue (struct rtems_termios_tty *tty) c = tty->rawInBuf.theBuf[newHead]; tty->rawInBuf.Head = newHead; - if(((tty->rawInBuf.Tail-newHead+tty->rawInBuf.Size) - % tty->rawInBuf.Size) + if(((tty->rawInBuf.Tail - newHead) % tty->rawInBuf.Size) < tty->lowwater) { tty->flow_ctrl &= ~FL_IREQXOF; /* if tx stopped and XON should be sent... */ @@ -1756,8 +1755,8 @@ rtems_termios_enqueue_raw_characters (void *ttyp, const char *buf, int len) newTail = (oldTail + 1) % tty->rawInBuf.Size; /* if chars_in_buffer > highwater */ - if ((tty->flow_ctrl & FL_IREQXOF) != 0 && (((newTail - head - + tty->rawInBuf.Size) % tty->rawInBuf.Size) > tty->highwater)) { + if ((tty->flow_ctrl & FL_IREQXOF) != 0 && (((newTail - head) % + tty->rawInBuf.Size) > tty->highwater)) { /* incoming data stream should be stopped */ tty->flow_ctrl |= FL_IREQXOF; if ((tty->flow_ctrl & (FL_MDXOF | FL_ISNTXOF)) |