1 files changed, 34 insertions, 0 deletions
diff --git a/src/string/memmove_s.c b/src/string/memmove_s.c
new file mode 100644
index 00000000..c489161d
--- /dev/null
+++ b/src/string/memmove_s.c
@@ -0,0 +1,34 @@
+#include "string.h"
+#include "stdlib.h"
+#include "sys/_nonstd_.h"
+
+/** move memory **/
+errno_t memmove_s(void *s1, rsize_t s1max, const void *s2, rsize_t n)
+{
+	__C_EXT(1, 201112L);
+	__ASSERT_NONNULL(s1);
+	__ASSERT_NONNULL(s2);
+
+	void *buf = malloc(n);
+	memcpy(buf, s2, n);
+	memcpy(s1, buf, n);
+	free(buf);
+	return s1;
+}
+
+/***
+The fn(memmove) function copies arg(n) bytes of memory from the object at
+arg(s2) to the object at arg(s1). If arg(s1) and arg(s2) overlap, the memory
+is copied so that the arg(n) bytes are safely written to arg(s1).
+***/
+
+/* UNSPECIFIED: - */
+/* UNDEFINED: - */
+/* IMPLEMENTATION: - */
+/* LOCALE: - */
+
+/* RETURN: the value of arg(s1) */
+
+/*
+CEXT1(201112)
+*/