1 files changed, 37 insertions, 0 deletions
diff --git a/src/stdlib/mbtowc.c b/src/stdlib/mbtowc.c
new file mode 100644
index 00000000..3704acd4
--- /dev/null
+++ b/src/stdlib/mbtowc.c
@@ -0,0 +1,37 @@
+#include <stdlib.h>
+
+/** convert a multibyte character to a wide character **/
+
+int mbtowc(wchar_t * restrict pwc, const char * restrict s, size_t n)
+{
+	/* FIXME: forward dependency on AMD1 */
+	#if 0
+	static mbstate_t ps = 0;
+	return mbrtowc(pwc, s, n, &ps);
+	#else
+	(void)pwc; (void)s; (void)n;
+	return 0;
+	#endif
+}
+
+/***
+converts the multibyte character, of no more than ARGUMENT(n) bytes, at
+ARGUMENT(s) to a wide character, which is stored at the address pointed to by
+ARGUMENT(pwc).
+
+If ARGUMENT(s) is CONSTANT(NULL), THIS() tests whether multibyte encodings carry
+state dependency.
+
+If ARGUMENT(pwc) is CONSTANT(NULL), THIS() counts the number of bytes in the
+multibyte character at ARGUMENT(s).
+***/
+
+/*
+LC_CTYPE
+RETURN(0, If ARGUMENT(s) is CONSTANT(NULL), multibyte encodings do not have state dependencies)
+RETURN(NONZERO, If ARGUMENT(s) is CONSTANT(NULL), multibyte encodings do have state dependencies)
+RETURN(-1, The ARGUMENT(n) bytes at ARGUMENT(s) do not form a valid mutlibyte character)
+RETURN(0, ARGUMENT(s) points to a null character)
+RETURN(TYPE(int), the number of bytes in the converted multibyte character)
+STDC(1)
+*/