1 files changed, 20 insertions, 2 deletions
diff --git a/src/mem/memmove.c b/src/mem/memmove.c
index b6c6b1e..abb5d41 100644
--- a/src/mem/memmove.c
+++ b/src/mem/memmove.c
@@ -6,6 +6,24 @@
 
 #include <mem.h>
 
-extern inline void *calt_memmove(void *dest, void const *src, size_t count);
-extern inline void *calt_memmove_null(void *dest, void const *src, size_t count);
+void *calt_memmove(void *dest, void const *src, size_t count) {
+	unsigned char *d = dest;
+	unsigned char const *s = src;
+
+	if (d > s) {
+		d += count;
+		s += count;
+		while (count-- > 0) {
+			*--d = *--s;
+		}
+	} else if (d < s) {
+		calt_memcpy(dest, src, count);
+	}
+
+	return dest;
+}
+
+void *calt_memmove_null(void *dest, void const *src, size_t count) {
+	return dest ? calt_memmove(dest, src, count) : NULL;
+}