1 files changed, 92 insertions, 0 deletions
diff --git a/usr/src/lib/libc/port/locale/towlower.c b/usr/src/lib/libc/port/locale/towlower.c
new file mode 100644
index 0000000000..74d408cfc4
--- /dev/null
+++ b/usr/src/lib/libc/port/locale/towlower.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 1989, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ * (c) UNIX System Laboratories, Inc.
+ * All or some portions of this file are derived from material licensed
+ * to the University of California by American Telephone and Telegraph
+ * Co. or Unix System Laboratories, Inc. and are reproduced herein with
+ * the permission of UNIX System Laboratories, Inc.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Paul Borman at Krystal Technologies.
+ *
+ * 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.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
+ */
+
+/*
+ * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#include "lint.h"
+#include <wctype.h>
+#include <stdio.h>
+#include "runetype.h"
+
+static wint_t
+__change_case_ext(wint_t c, int lower)
+{
+	size_t lim;
+	_RuneRange *rr;
+	_RuneEntry *base, *re;
+
+	if (c < 0 || c == EOF)
+		return (c);
+
+	rr = lower ?
+	    &_CurrentRuneLocale->__maplower_ext :
+	    &_CurrentRuneLocale->__mapupper_ext;
+	/* Binary search -- see bsearch.c for explanation. */
+	base = rr->__ranges;
+	for (lim = rr->__nranges; lim != 0; lim >>= 1) {
+		re = base + (lim >> 1);
+		if (re->__min <= c && c <= re->__max) {
+			return (re->__map + c - re->__min);
+		} else if (c > re->__max) {
+			base = re + 1;
+			lim--;
+		}
+	}
+
+	return (c);
+}
+
+#undef towlower
+wint_t
+towlower(wint_t wc)
+{
+	return ((wc < 0 || wc >= _CACHED_RUNES) ?
+	    __change_case_ext(wc, 1) :
+	    _CurrentRuneLocale->__maplower[wc]);
+}
+
+#undef towupper
+wint_t
+towupper(wint_t wc)
+{
+	return ((wc < 0 || wc >= _CACHED_RUNES) ?
+	    __change_case_ext(wc, 0) :
+	    _CurrentRuneLocale->__mapupper[wc]);
+}