Libc-320.tar.gz

[apple/libc.git] / locale / FreeBSD / collcmp.c

diff --git a/locale/FreeBSD/collcmp.c b/locale/FreeBSD/collcmp.c
new file mode 100644 (file)
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--- /dev/null
+++ b/locale/FreeBSD/collcmp.c
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+/*
+ * 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>
+__FBSDID("$FreeBSD: src/lib/libc/locale/collcmp.c,v 1.14 2002/03/22 21:52:18 obrien Exp $");
+
+#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);
+}