implement uchar.h (C11 UTF-16/32 conversion) interfaces

1 files changed, 11 insertions, 0 deletions

diff --git a/src/multibyte/mbrtoc32.c b/src/multibyte/mbrtoc32.c
new file mode 100644
index 00000000..c6d20824
--- /dev/null
+++ b/src/multibyte/mbrtoc32.c
@@ -0,0 +1,11 @@
+#include <uchar.h>
+#include <wchar.h>
+
+size_t mbrtoc32(char32_t *restrict pc32, const char *restrict s, size_t n, mbstate_t *restrict ps)
+{
+	if (!s) return mbrtoc32(0, "", 1, ps);
+	wchar_t wc;
+	size_t ret = mbrtowc(&wc, s, n, ps);
+	if (ret <= 4 && pc32) *pc32 = wc;
+	return ret;
+}