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authorRich Felker <dalias@aerifal.cx>2018-09-23 02:48:25 -0400
committerRich Felker <dalias@aerifal.cx>2018-09-23 02:48:25 -0400
commit82c41e92320c3f84bd6d24e21c5350a06e2fc831 (patch)
tree0764d73765dcc2a8547dc8ca55e74a42cd7cd868
parentdebadaa238e90fce897b467a9efefcbbc0155d06 (diff)
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fix undefined pointer comparison in wmemmove
-rw-r--r--src/string/wmemmove.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/string/wmemmove.c b/src/string/wmemmove.c
index e406f3d5..d58cebac 100644
--- a/src/string/wmemmove.c
+++ b/src/string/wmemmove.c
@@ -1,9 +1,10 @@
 #include <wchar.h>
+#include <stdint.h>
 
 wchar_t *wmemmove(wchar_t *d, const wchar_t *s, size_t n)
 {
 	wchar_t *d0 = d;
-	if ((size_t)(d-s) < n)
+	if ((uintptr_t)d-(uintptr_t)s < n * sizeof *d)
 		while (n--) d[n] = s[n];
 	else
 		while (n--) *d++ = *s++;