From b44cb2ca5b56462db5902739e473d34452fbb2fe Mon Sep 17 00:00:00 2001
From: ratchov <ratchov@openbsd.org>
Date: Fri, 2 Oct 2015 09:48:22 +0000
Subject: Validate that midi and audio device numbers are integers.

---
 lib/libsndio/debug.c | 26 +++++++++++++++++++++++++-
 1 file changed, 25 insertions(+), 1 deletion(-)

(limited to 'lib/libsndio/debug.c')

diff --git a/lib/libsndio/debug.c b/lib/libsndio/debug.c
index e1542bc47cf..6940ca9b909 100644
--- a/lib/libsndio/debug.c
+++ b/lib/libsndio/debug.c
@@ -1,4 +1,4 @@
-/*	$OpenBSD: debug.c,v 1.3 2013/11/13 22:38:22 ratchov Exp $	*/
+/*	$OpenBSD: debug.c,v 1.4 2015/10/02 09:48:22 ratchov Exp $	*/
 /*
  * Copyright (c) 2011 Alexandre Ratchov <alex@caoua.org>
  *
@@ -53,3 +53,27 @@ _sndio_parsetype(const char *str, char *type)
 		return NULL;
 	return str;
 }
+
+const char *
+_sndio_parsenum(const char *str, unsigned int *num, unsigned int max)
+{
+	const char *p = str;
+	unsigned int dig, maxq, maxr, val;
+
+	val = 0;
+	maxq = max / 10;
+	maxr = max % 10;
+	for (;;) {
+		dig = *p - '0';
+		if (dig >= 10)
+			break;
+		if (val > maxq || (val == maxq && dig > maxr))
+			return NULL;
+		val = val * 10 + dig;
+		p++;
+	}
+	if (p == str)
+		return NULL;
+	*num = val;
+	return p;
+}
-- 
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