--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usr/src/cmd/tr/cset.h	Wed Aug 18 14:41:42 2010 -0700
@@ -0,0 +1,63 @@
+/*
+ * Copyright (c) 2004 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.
+ */
+
+#ifndef CSET_H
+#define	CSET_H
+
+#include <stdbool.h>
+#include <wchar.h>
+#include <wctype.h>
+
+struct csnode {
+	wchar_t		csn_min;
+	wchar_t		csn_max;
+	struct csnode	*csn_left;
+	struct csnode	*csn_right;
+};
+
+struct csclass {
+	wctype_t	csc_type;
+	bool		csc_invert;
+	struct csclass	*csc_next;
+};
+
+struct cset {
+#define	CS_CACHE_SIZE	256
+	bool		cs_cache[CS_CACHE_SIZE];
+	bool		cs_havecache;
+	struct csclass	*cs_classes;
+	struct csnode	*cs_root;
+	bool		cs_invert;
+};
+
+bool			cset_addclass(struct cset *, wctype_t, bool);
+struct cset 		*cset_alloc(void);
+bool 			cset_add(struct cset *, wchar_t);
+void			cset_invert(struct cset *);
+bool			cset_in_hard(struct cset *, wchar_t);
+void			cset_cache(struct cset *);
+
+#endif	/* CSET_H */