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From: Corinna Vinschen <corinna@sourceware.org> To: cygwin-cvs@sourceware.org Subject: [newlib-cygwin] Cygwin: console: convert wpbuf_put to inline function Date: Mon, 02 Mar 2020 19:52:00 -0000 [thread overview] Message-ID: <20200302195236.81007.qmail@sourceware.org> (raw) https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=ecf27dd2e0ed1dff4dc919a7c805e951913d953f commit ecf27dd2e0ed1dff4dc919a7c805e951913d953f Author: Corinna Vinschen <corinna@vinschen.de> Date: Mon Mar 2 20:30:09 2020 +0100 Cygwin: console: convert wpbuf_put to inline function fix potential buffer overrun while at it Signed-off-by: Corinna Vinschen <corinna@vinschen.de> Diff: --- winsup/cygwin/fhandler_console.cc | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/winsup/cygwin/fhandler_console.cc b/winsup/cygwin/fhandler_console.cc index dffee24..c5f2691 100644 --- a/winsup/cygwin/fhandler_console.cc +++ b/winsup/cygwin/fhandler_console.cc @@ -63,10 +63,13 @@ static struct fhandler_base::rabuf_t con_ra; static unsigned char wpbuf[WPBUF_LEN]; static int wpixput; static unsigned char last_char; -#define wpbuf_put(x) \ - wpbuf[wpixput++] = x; \ - if (wpixput > WPBUF_LEN) \ - wpixput--; + +static inline void +wpbuf_put (unsigned char x) +{ + if (wpixput < WPBUF_LEN) + wpbuf[wpixput++] = x; +} static void beep ()
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