implement tracking mechanisms for mbstate_t

1 files changed, 7 insertions, 6 deletions

diff --git a/src/wchar/mbsinit.c b/src/wchar/mbsinit.c
index 52640483..9b41e2a2 100644
--- a/src/wchar/mbsinit.c
+++ b/src/wchar/mbsinit.c
@@ -1,12 +1,16 @@
-#if 0
-
 #include <wchar.h>
+#include "_wchar.h"
 
 int mbsinit(const mbstate_t * ps)
 {
 	SIGNAL_SAFE(0);
 
-	if (ps == NULL || *ps == 0) {
+	if (ps == NULL || ps->__impl == NULL) {
+		return 1;
+	}
+
+	struct __mbstate_t *m = ps->__impl;
+	if (m->ctype_epoch == 0 && m->dir == NONE && m->mbs == NULL && m->wcs == NULL) {
 		return 1;
 	}
 
@@ -16,6 +20,3 @@ int mbsinit(const mbstate_t * ps)
 /*
 STDC(199409)
 */
-
-
-#endif