1 files changed, 53 insertions, 0 deletions
diff --git a/lib/libc/locale/btowc.c b/lib/libc/locale/btowc.c
new file mode 100644
index 0000000..2c4d493
--- /dev/null
+++ b/lib/libc/locale/btowc.c
@@ -0,0 +1,53 @@
+/*-
+ * Copyright (c) 2002, 2003 Tim J. Robbins.
+ * 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 <stdio.h>
+#include <wchar.h>
+#include "mblocal.h"
+
+wint_t
+btowc(int c)
+{
+	static const mbstate_t initial;
+	mbstate_t mbs = initial;
+	char cc;
+	wchar_t wc;
+
+	if (c == EOF)
+		return (WEOF);
+	/*
+	 * We expect mbrtowc() to return 0 or 1, hence the check for n > 1
+	 * which detects error return values as well as "impossible" byte
+	 * counts.
+	 */
+	cc = (char)c;
+	if (__mbrtowc(&wc, &cc, 1, &mbs) > 1)
+		return (WEOF);
+	return (wc);
+}