Add White_Space support from PropList.txt.

Makefile.am

 	src/case.c \
 	src/categories.c \
 	src/ctype.c \
+	src/proplist.c \
 	src/scripts.c \
 	src/tostring.c
 

src/include/ucd/ucd.h

   */
 ucd_script ucd_lookup_script(codepoint_t c);
 
+/** @brief Properties
+  */
+typedef enum ucd_property_
+{
+	UCD_PROPERTY_WHITE_SPACE = 0x0001, /**< @brief White_Space */
+} ucd_property;
+
+/** @brief Return the properties of the specified codepoint.
+ *
+ * @param c        The Unicode codepoint to lookup.
+ * @param category The General Category of the codepoint.
+ * @return         The properties associated with the codepoint.
+ */
+ucd_property ucd_properties(codepoint_t c, ucd_category category);
+
 /** @brief Is the codepoint in the 'alnum' class?
   *
   * @param c The Unicode codepoint to check.
 		return (script)ucd_lookup_script(c);
 	}
 
+	/** @brief Properties
+	  */
+	enum property
+	{
+		White_Space = UCD_PROPERTY_WHITE_SPACE, /**< @brief White_Space */
+	};
+
+	/** @brief Return the properties of the specified codepoint.
+	 *
+	 * @param c   The Unicode codepoint to lookup.
+	 * @param cat The General Category of the codepoint.
+	 * @return    The properties associated with the codepoint.
+	 */
+	inline property properties(codepoint_t c, category cat)
+	{
+		return (property)ucd_properties(c, (ucd_category)cat);
+	}
+
 	/** @brief Is the codepoint in the 'alnum' class?
 	  *
 	  * @param c The Unicode codepoint to check.

src/proplist.c

+/* PropList APIs.
+ *
+ * Copyright (C) 2017 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/>.
+ */
+
+#include "ucd/ucd.h"
+
+ucd_property ucd_properties(codepoint_t c, ucd_category category)
+{
+	switch (category)
+	{
+	case UCD_CATEGORY_Cc:
+		switch (c)
+		{
+		case 0x09: // CHARACTER TABULATION
+		case 0x0A: // LINE FEED
+		case 0x0B: // LINE TABULATION
+		case 0x0C: // FORM FEED
+		case 0x0D: // CARRIAGE RETURN
+		case 0x85: // NEXT LINE
+			return UCD_PROPERTY_WHITE_SPACE;
+		}
+		return 0;
+	case UCD_CATEGORY_Zl:
+	case UCD_CATEGORY_Zp:
+	case UCD_CATEGORY_Zs:
+		return UCD_PROPERTY_WHITE_SPACE;
+	default:
+		return 0;
+	};
+}