1 files changed, 84 insertions, 0 deletions
diff --git a/newlib/libc/posix/collcmp.c b/newlib/libc/posix/collcmp.c
new file mode 100644
index 0000000..7770897
--- /dev/null
+++ b/newlib/libc/posix/collcmp.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 1996 by Andrey A. Chernov, Moscow, Russia.
+ * 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 ``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.
+ */
+
+#include <sys/cdefs.h>
+
+#define ASCII_COMPATIBLE_COLLATE        /* see share/colldef */
+
+#include <string.h>
+#include "collate.h"
+#ifndef ASCII_COMPATIBLE_COLLATE
+#include <ctype.h>
+#endif
+
+/*
+ * Compare two characters converting collate information
+ * into ASCII-compatible range, it allows to handle
+ * "[a-z]"-type ranges with national characters.
+ */
+
+int __collate_range_cmp (c1, c2)
+	int c1, c2;
+{
+	static char s1[2], s2[2];
+	int ret;
+#ifndef ASCII_COMPATIBLE_COLLATE
+	int as1, as2, al1, al2;
+#endif
+
+	c1 &= UCHAR_MAX;
+	c2 &= UCHAR_MAX;
+	if (c1 == c2)
+		return (0);
+
+#ifndef ASCII_COMPATIBLE_COLLATE
+	as1 = isascii(c1);
+	as2 = isascii(c2);
+	al1 = isalpha(c1);
+	al2 = isalpha(c2);
+
+	if (as1 || as2 || al1 || al2) {
+		if ((as1 && as2) || (!al1 && !al2))
+			return (c1 - c2);
+		if (al1 && !al2) {
+			if (isupper(c1))
+				return ('A' - c2);
+			else
+				return ('a' - c2);
+		} else if (al2 && !al1) {
+			if (isupper(c2))
+				return (c1 - 'A');
+			else
+				return (c1 - 'a');
+		}
+	}
+#endif
+	s1[0] = c1;
+	s2[0] = c2;
+	if ((ret = strcoll(s1, s2)) != 0)
+		return (ret);
+	return (c1 - c2);
+}