From 1411224b169b5a2d134111b068e17f3020753ca9 Mon Sep 17 00:00:00 2001 From: Hiltjo Posthuma Date: Mon, 16 Dec 2019 18:26:01 +0100 Subject: [PATCH] fix undefined behaviour of use of isalpha, isdigit and tolower "The argument c must be EOF or representable as an unsigned char; otherwise, the result is undefined." --- ii.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/ii.c b/ii.c index 55d5f52..94da8ab 100644 --- a/ii.c +++ b/ii.c @@ -140,9 +140,9 @@ static void channel_normalize_path(char *s) { for (; *s; s++) { - if (isalpha(*s)) - *s = tolower(*s); - else if (!isdigit(*s) && !strchr(".#&+!-", *s)) + if (isalpha((unsigned char)*s)) + *s = tolower((unsigned char)*s); + else if (!isdigit((unsigned char)*s) && !strchr(".#&+!-", *s)) *s = '_'; } }