implement tracking mechanisms for mbstate_t

1 files changed, 16 insertions, 8 deletions

diff --git a/src/wchar/mbsrtowcs.c b/src/wchar/mbsrtowcs.c
index 2f273598..a23402b3 100644
--- a/src/wchar/mbsrtowcs.c
+++ b/src/wchar/mbsrtowcs.c
@@ -1,19 +1,27 @@
-#if 0
-
 #include <wchar.h>
+#include "_wchar.h"
 
-size_t mbsrtowcs(wchar_t * restrict dst, const char * restrict src, size_t len, mbstate_t * restrict ps)
+GCC_SSE_HACK
+size_t mbsrtowcs(wchar_t * restrict dst, const char ** restrict src, size_t len, mbstate_t * restrict ps)
 {
+	static struct __mbstate_t internal = { 0 };
+	static mbstate_t ip = { &internal };
+
+	if (ps == NULL) {
+		ps = &ip;
+	}
+
 	SIGNAL_SAFE(0);
+	ASSERT_MBSTATE(ps, MBTOW, *src, dst);
 	/* TODO: overlap */
 
-	(void)dst; (void)src; (void)len; (void)ps;
-	return 0;
+	SET_MBSTATE(ps, MBTOW, *src, dst);
+
+	/* TODO: implement */
+
+	return len;
 }
 
 /*
 STDC(199409)
 */
-
-
-#endif