Add ttydisc_rint_simple().

I noticed several drivers in our tree don't actually care about parity
and framing, such as pts(4), snp(4) (and my partially finished console
driver). Instead of duplicating a lot of code, I think we'd better add a
utility function for those drivers to quickly process a buffer of input.

Also change pts(4) and snp(4) to use this function.

1 files changed, 16 insertions, 0 deletions

diff --git a/sys/kern/tty_ttydisc.c b/sys/kern/tty_ttydisc.c
index debaa1c..d79a2b7 100644
--- a/sys/kern/tty_ttydisc.c
+++ b/sys/kern/tty_ttydisc.c
@@ -1045,6 +1045,22 @@ print:
 }
 
 size_t
+ttydisc_rint_simple(struct tty *tp, const void *buf, size_t len)
+{
+	const char *cbuf;
+
+	if (ttydisc_can_bypass(tp))
+		return (ttydisc_rint_bypass(tp, buf, len));
+
+	for (cbuf = buf; len-- > 0; cbuf++) {
+		if (ttydisc_rint(tp, *cbuf, 0) != 0)
+			break;
+	}
+
+	return (cbuf - (const char *)buf);
+}
+
+size_t
 ttydisc_rint_bypass(struct tty *tp, const void *buf, size_t len)
 {
 	size_t ret;