1 files changed, 32 insertions, 0 deletions
diff --git a/src/string/strxfrm.c b/src/string/strxfrm.c
new file mode 100644
index 00000000..b6ec62b6
--- /dev/null
+++ b/src/string/strxfrm.c
@@ -0,0 +1,32 @@
+#include <string.h>
+#include "nonstd/assert.h"
+
+/** transform string **/
+size_t strxfrm(char * restrict s1, const char * restrict s2, size_t n)
+{
+	/* TODO */
+	(void)s1; (void)s2; (void)n;
+	ASSERT_NONNULL(s2);
+
+	if (n != 0) {
+		ASSERT_NONNULL(s1);
+		ASSERT_NOOVERLAP(s1, s2, n);
+	}
+	
+	return 0;
+}
+
+/***
+transforms up to ARGUMENT(n) bytes of the string at ARGUMENT(s2),
+placing the transformed string at ARGUMENT(s1). The transformed string is the
+canonical form of the string used for collation purposes. If a CHAR(\0) is
+transformed, no further characters are transformed.
+***/
+
+/*
+UNDEFINED(ARGUMENT(n) is not ZERO and ARGUMENT(s1) is CONSTANT(NULL))
+*/
+/*
+	RETURN_ALWAYS(the length of the transformed string, not including the terminating CHAR(\0));
+STDC(1)
+*/