Add ctype-style APIs that are compatible with wctype.h.

Makefile.am

 src_libucd_la_LDFLAGS = -version-info $(LIBUCD_VERSION)
 src_libucd_la_CXXFLAGS = ${AM_CXXFLAGS}
 src_libucd_la_SOURCES = \
-	src/categories.cpp
+	src/categories.cpp \
+	src/ctype.cpp

src/ctype.cpp

+/* ctype-style APIs.
+ *
+ * Copyright (C) 2012 Reece H. Dunn
+ *
+ * This file is part of ucd-tools.
+ *
+ * ucd-tools is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * ucd-tools is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with ucd-tools.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+// NOTE: This file is automatically generated from the UnicodeData.txt file in
+// the Unicode Character database by the ucd-tools/tools/categories.py script.
+
+#include "ucd/ucd.h"
+
+int ucd::isalnum(codepoint_t c)
+{
+	switch (lookup_category(c))
+	{
+	case Ll: case Lm: case Lo: case Lt: case Lu:
+	case Nd: case Nl: case No:
+		return 1;
+	}
+	return 0;
+}
+
+int ucd::isalpha(codepoint_t c)
+{
+	switch (lookup_category(c))
+	{
+	case Ll: case Lm: case Lo: case Lt: case Lu:
+		return 1;
+	}
+	return 0;
+}
+
+int ucd::iscntrl(codepoint_t c)
+{
+	switch (lookup_category(c))
+	{
+	case Cc: case Zc:
+		return 1;
+	}
+	return 0;
+}
+
+int ucd::isdigit(codepoint_t c)
+{
+	switch (lookup_category(c))
+	{
+	case Nd: case Nl: case No:
+		return 1;
+	}
+	return 0;
+}
+
+int ucd::isgraph(codepoint_t c)
+{
+	switch (lookup_category(c))
+	{
+	case Cc: case Cf: case Ci: case Cn: case Co: case Cs:
+	case Zc: case Zl: case Zp: case Zs:
+		return 0;
+	}
+	return 1;
+}
+
+int ucd::islower(codepoint_t c)
+{
+	return lookup_category(c) == Ll;
+}
+
+int ucd::isprint(codepoint_t c)
+{
+	switch (lookup_category(c))
+	{
+	case Cc: case Cf: case Ci: case Cn: case Co: case Cs:
+		return 0;
+	}
+	return 1;
+}
+
+int ucd::ispunct(codepoint_t c)
+{
+	switch (lookup_category(c))
+	{
+	case Pc: case Pd: case Pe: case Pf: case Pi: case Po: case Ps:
+		return 1;
+	}
+	return 0;
+}
+
+int ucd::isspace(codepoint_t c)
+{
+	switch (lookup_category(c))
+	{
+	case Zc: case Zl: case Zp: case Zs:
+		return 1;
+	}
+	return 0;
+}
+
+int ucd::isupper(codepoint_t c)
+{
+	return lookup_category(c) == Lu;
+}

src/include/ucd/ucd.h

 	  * @return  The General Category of the Unicode codepoint.
 	  */
 	category lookup_category(codepoint_t c);
+
+
+	/** @name  ctype-style APIs
+	  * @brief These functions provide wctype compatible functions using the UCD data.
+	  */
+	//@{
+
+
+	/** @brief Is the codepoint an alpha-numeric character?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint is a letter or number, zero otherwise.
+	  */
+	int isalnum(codepoint_t c);
+
+	/** @brief Is the codepoint a letter?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint is a letter, zero otherwise.
+	  */
+	int isalpha(codepoint_t c);
+
+	/** @brief Is the codepoint a control character?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint is a control character, zero otherwise.
+	  */
+	int iscntrl(codepoint_t c);
+
+	/** @brief Is the codepoint a numeric character?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint is a number, zero otherwise.
+	  */
+	int isdigit(codepoint_t c);
+
+	/** @brief Does the codepoint have a displayable glyph?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint has a displayable glyph, zero otherwise.
+	  */
+	int isgraph(codepoint_t c);
+
+	/** @brief Is the codepoint a lower-case letter?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint is a lower-case letter, zero otherwise.
+	  */
+	int islower(codepoint_t c);
+
+	/** @brief Is the codepoint a printable character?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint is a printable character, zero otherwise.
+	  */
+	int isprint(codepoint_t c);
+
+	/** @brief Is the codepoint a punctuation character?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint is a punctuation character, zero otherwise.
+	  */
+	int ispunct(codepoint_t c);
+
+	/** @brief Is the codepoint a whitespace character?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint is a whitespace character, zero otherwise.
+	  */
+	int isspace(codepoint_t c);
+
+	/** @brief Is the codepoint an upper-case letter?
+	  *
+	  * @param c The Unicode codepoint to check.
+	  * @return  Non-zero if the codepoint is an upper-case letter, zero otherwise.
+	  */
+	int isupper(codepoint_t c);
+
+
+	//@}
 }
 
 #endif