1 files changed, 81 insertions, 0 deletions
diff --git a/lib/libc/locale/c16rtomb.c b/lib/libc/locale/c16rtomb.c
new file mode 100644
index 0000000..8bad982
--- /dev/null
+++ b/lib/libc/locale/c16rtomb.c
@@ -0,0 +1,81 @@
+/*-
+ * Copyright (c) 2013 Ed Schouten <ed@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <errno.h>
+#include <uchar.h>
+#include "xlocale_private.h"
+
+typedef struct {
+	char16_t	lead_surrogate;
+	mbstate_t	c32_mbstate;
+} _Char16State;
+
+size_t
+c16rtomb_l(char * __restrict s, char16_t c16, mbstate_t * __restrict ps,
+    locale_t locale)
+{
+	_Char16State *cs;
+	char32_t c32;
+
+	FIX_LOCALE(locale);
+	if (ps == NULL)
+		ps = &locale->c16rtomb;
+	cs = (_Char16State *)ps;
+
+	/* If s is a null pointer, the value of parameter c16 is ignored. */
+	if (s == NULL) {
+		c32 = 0;
+	} else if (cs->lead_surrogate >= 0xd800 &&
+	    cs->lead_surrogate <= 0xdbff) {
+		/* We should see a trail surrogate now. */
+		if (c16 < 0xdc00 || c16 > 0xdfff) {
+			errno = EILSEQ;
+			return ((size_t)-1);
+		}
+		c32 = 0x10000 + ((cs->lead_surrogate & 0x3ff) << 10 |
+		    (c16 & 0x3ff));
+	} else if (c16 >= 0xd800 && c16 <= 0xdbff) {
+		/* Store lead surrogate for next invocation. */
+		cs->lead_surrogate = c16;
+		return (0);
+	} else {
+		/* Regular character. */
+		c32 = c16;
+	}
+	cs->lead_surrogate = 0;
+
+	return (c32rtomb_l(s, c32, &cs->c32_mbstate, locale));
+}
+
+size_t
+c16rtomb(char * __restrict s, char16_t c16, mbstate_t * __restrict ps)
+{
+
+	return (c16rtomb_l(s, c16, ps, __get_locale()));
+}