1 files changed, 32 insertions, 0 deletions
diff --git a/src/wctype/iswctype.c b/src/wctype/iswctype.c
new file mode 100644
index 00000000..fd24051a
--- /dev/null
+++ b/src/wctype/iswctype.c
@@ -0,0 +1,32 @@
+#include <wctype.h>
+#include "wchar.h"
+#include "nonstd/assert.h"
+
+/** test whether a wide character is part of a character class **/
+int iswctype(wint_t wc, wctype_t desc)
+{
+	ASSERT_REPRESENTABLE(wc, WCHAR_MIN, WCHAR_MAX, "wchar_t", WEOF);
+	ASSERT_REPRESENTABLE(desc, 1, __libc.wctype.nwctype, "wctype_t", 0);
+
+	/* TODO: actual work */
+	(void)wc; (void)desc;
+
+	return 0;
+}
+
+/***
+The fn(iswctype) function tests whether arg(wc) is a wide character in the
+character class represented by arg(desc), which must have been previously
+returned by fn(wctype), in the current locale.
+***/
+
+/* RETURN(0): arg(wc) is not in the character class represented by arg(desc) */
+/* RETURN(NZ): arg(wc) is in the character class represented by arg(desc) */
+
+/* UNSPECIFIED: - */
+/* IMPLEMENTATION: - */
+/* LOCALE: LC_CTYPE */
+
+/*
+STDC(199409)
+*/