1 files changed, 57 insertions, 0 deletions
diff --git a/unicode/unicode_ultcase.c b/unicode/unicode_ultcase.c
new file mode 100644
index 0000000..e0c339e
--- /dev/null
+++ b/unicode/unicode_ultcase.c
@@ -0,0 +1,57 @@
+/*
+** Copyright 2000-2003 Double Precision, Inc.
+** See COPYING for distribution information.
+**
+*/
+
+#include "unicode_config.h"
+#include "unicode.h"
+
+extern const unsigned unicode_case_hash;
+extern const unicode_char unicode_case_tab[][4];
+extern const unsigned unicode_case_offset[];
+
+static unsigned find_case(unicode_char c)
+{
+	unsigned idx= c % unicode_case_hash;
+
+	unsigned i=unicode_case_offset[idx];
+
+	unicode_char uc;
+
+	--i;
+
+	do
+	{
+		uc=unicode_case_tab[++i][0];
+		if (uc == c)
+			return (i);
+	} while ( (uc % unicode_case_hash) == idx);
+
+	return (0);
+}
+
+unicode_char unicode_uc(unicode_char c)
+{
+	unsigned i=find_case(c);
+
+	return (unicode_case_tab[i][0] != c ? c:unicode_case_tab[i][1]);
+}
+
+unicode_char unicode_lc(unicode_char c)
+{
+	unsigned i=find_case(c);
+
+	return (unicode_case_tab[i][0] != c ? c:unicode_case_tab[i][2]);
+}
+
+unicode_char unicode_tc(unicode_char c)
+{
+	unsigned i;
+	unicode_char oc=c;
+
+	c=unicode_lc(c);
+	i=find_case(c);
+
+	return (unicode_case_tab[i][0] != c ? oc:unicode_case_tab[i][3]);
+}