1 files changed, 94 insertions, 0 deletions
diff --git a/lib/libc/locale/srune.c b/lib/libc/locale/srune.c
new file mode 100644
index 0000000..86d40a7
--- /dev/null
+++ b/lib/libc/locale/srune.c
@@ -0,0 +1,94 @@
+/*-
+ * Copyright (c) 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 <limits.h>
+#include <rune.h>
+#include <wchar.h>
+
+/*
+ * Emulate the deprecated 4.4BSD sgetrune() function in terms of
+ * the ISO C mbrtowc() function.
+ */
+rune_t
+__emulated_sgetrune(const char *string, size_t n, const char **result)
+{
+	wchar_t wc;
+	size_t nconv;
+
+	/*
+	 * Pass a NULL conversion state to mbrtowc() since multibyte
+	 * conversion states are not supported.
+	 */
+	nconv = mbrtowc(&wc, string, n, NULL);
+	if (nconv == (size_t)-2) {
+		if (result != NULL)
+			*result = string;
+		return (_INVALID_RUNE);
+	}
+	if (nconv == (size_t)-1) {
+		if (result != NULL)
+			*result = string + 1;
+		return (_INVALID_RUNE);
+	}
+	if (nconv == 0)
+		nconv = 1;
+	if (result != NULL)
+		*result = string + nconv;
+	return ((rune_t)wc);
+}
+
+/*
+ * Emulate the deprecated 4.4BSD sputrune() function in terms of
+ * the ISO C wcrtomb() function.
+ */
+int
+__emulated_sputrune(rune_t rune, char *string, size_t n, char **result)
+{
+	char buf[MB_LEN_MAX];
+	size_t nconv;
+
+	nconv = wcrtomb(buf, (wchar_t)rune, NULL);
+	if (nconv == (size_t)-1) {
+		if (result != NULL)
+			*result = NULL;
+		return (0);
+	}
+	if (string == NULL) {
+		if (result != NULL)
+			*result = (char *)0 + nconv;
+	} else if (n >= nconv) {
+		memcpy(string, buf, nconv);
+		if (result != NULL)
+			*result = string + nconv;
+	} else {
+		if (result != NULL)
+			*result = NULL;
+	}
+	return (nconv);
+}