libc: fix memchr implementation
The previous implementation could behave incorrectly because of the sign
extension of the char when compared to the int.
Change-Id: I397838b0ec87a6f1af6972d022a8c19a5184b447
Signed-off-by: Ambroise Vincent <ambroise.vincent@arm.com>
diff --git a/lib/libc/memchr.c b/lib/libc/memchr.c
index 0fe0535..8cbb715 100644
--- a/lib/libc/memchr.c
+++ b/lib/libc/memchr.c
@@ -9,10 +9,10 @@
void *memchr(const void *src, int c, size_t len)
{
- const char *s = src;
+ const unsigned char *s = src;
while (len--) {
- if (*s == c)
+ if (*s == (unsigned char)c)
return (void *) s;
s++;
}