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authorNRK <nrk@disroot.org>2022-03-18 11:20:54 +0100
committerHiltjo Posthuma <hiltjo@codemadness.org>2022-03-18 12:11:27 +0100
commitaf3bb68add1c40d19d0dee382009e21b0870a38f (patch)
treeb18ab790bbc7a3ac21e39ab606b7d05c9274a105
parent2aefa348baf4b702fdce98eb105bcba175d8283f (diff)
downloadst-af3bb68add1c40d19d0dee382009e21b0870a38f.tar.zst
avoid potential UB when using isprint()
all the ctype.h functions' argument must be representable as an unsigned char or as EOF, otherwise the behavior is undefined.
-rw-r--r--st.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/st.c b/st.c
index c71fa06..1307fdf 100644
--- a/st.c
+++ b/st.c
@@ -367,7 +367,7 @@ static const char base64_digits[] = {
char
base64dec_getc(const char **src)
{
- while (**src && !isprint(**src))
+ while (**src && !isprint((unsigned char)**src))
(*src)++;
return **src ? *((*src)++) : '='; /* emulate padding if string ends */
}