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| author |   ratchov <ratchov@openbsd.org> | 2015-10-02 09:48:22 +0000 |
|---|---|---|
| committer | ratchov <ratchov@openbsd.org> | 2015-10-02 09:48:22 +0000 |
| commit | b44cb2ca5b56462db5902739e473d34452fbb2fe (patch) | |
| tree | 8c280c87d6e200075a2b92248476becc6b35a83a /lib/libsndio/debug.c | |
| parent | As device path is known, use its size instead of PATH_MAX (diff) | |
| download | wireguard-openbsd-b44cb2ca5b56462db5902739e473d34452fbb2fe.tar.xz wireguard-openbsd-b44cb2ca5b56462db5902739e473d34452fbb2fe.zip | |
Validate that midi and audio device numbers are integers.
Diffstat (limited to 'lib/libsndio/debug.c')
| -rw-r--r-- | lib/libsndio/debug.c | 26 |
1 files changed, 25 insertions, 1 deletions
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; +} |