1 files changed, 35 insertions, 0 deletions
diff --git a/src/string/memcpy_s.c b/src/string/memcpy_s.c
new file mode 100644
index 00000000..366a879c
--- /dev/null
+++ b/src/string/memcpy_s.c
@@ -0,0 +1,35 @@
+#include "string.h"
+#include "sys/_nonstd_.h"
+
+/** copy memory **/
+errno_t memcpy_s(void * restrict s1, rsize_t s1max, const void * restrict s2, rsize_t n)
+{
+	__C_EXT(1, 201112L);
+	__ASSERT_NONNULL(s1);
+	__ASSERT_NONNULL(s2);
+	__ASSERT_NOOVERLAP(s1, s2, n);
+
+	char *dst = (char*)s1, *src = (char*)s2;
+	int i = 0;
+	while (i < n) {
+		dst[i] = src[i];
+		i++;
+	}
+	return dst;
+}
+
+/***
+The fn(memcpy) copies arg(n) bytes from the object at arg(s2) to the object at
+arg(s1).
+***/
+
+/* UNSPECIFIED: - */
+/* UNDEFINED: if the objects overlap */
+/* IMPLEMENTATION: - */
+/* LOCALE: - */
+
+/* RETURN: the value of arg(s1) */
+
+/*
+CEXT1(201112)
+*/