1 files changed, 33 insertions, 0 deletions
diff --git a/src/stdio/fputwc.c b/src/stdio/fputwc.c
new file mode 100644
index 00000000..b48bb74d
--- /dev/null
+++ b/src/stdio/fputwc.c
@@ -0,0 +1,33 @@
+#include "stdio_impl.h"
+
+wint_t __fputwc_unlocked(wchar_t c, FILE *f)
+{
+	char mbc[MB_LEN_MAX];
+	int l;
+
+	f->mode |= f->mode+1;
+
+	if (isascii(c)) {
+		if (c != f->lbf && f->wpos + 1 < f->wend) *f->wpos++ = c;
+		else c = __overflow(f, c);
+	} else if (f->wpos + MB_LEN_MAX < f->wend) {
+		l = wctomb(f->wpos, c);
+		if (l < 0) c = WEOF;
+		else f->wpos += l;
+	} else {
+		l = wctomb(mbc, c);
+		if (l < 0 || __fwritex(mbc, l, f) < l) c = WEOF;
+	}
+	return c;
+}
+
+wint_t fputwc(wchar_t c, FILE *f)
+{
+	FLOCK(f);
+	c = __fputwc_unlocked(c, f);
+	FUNLOCK(f);
+	return 0;
+}
+
+weak_alias(__fputwc_unlocked, fputwc_unlocked);
+weak_alias(__fputwc_unlocked, putwc_unlocked);