1 files changed, 122 insertions, 0 deletions
diff --git a/src/CharacterSet.hpp b/src/CharacterSet.hpp
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+++ b/src/CharacterSet.hpp
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+#ifndef URI_CHARACTER_SET_HPP
+#define URI_CHARACTER_SET_HPP
+
+/**
+ * @file CharacterSet.hpp
+ *
+ * This module declares the Uri::IsCharacterInSet function
+ * and the CharacterSet class.
+ *
+ * © 2018 by Richard Walters
+ */
+
+#include <initializer_list>
+#include <memory>
+
+namespace Uri {
+
+    /**
+     * This represents a set of characters which can be queried
+     * to find out if a character is in the set or not.
+     */
+    class CharacterSet {
+        // Lifecycle management
+    public:
+        ~CharacterSet();
+        CharacterSet(const CharacterSet&);
+        CharacterSet(CharacterSet&&);
+        CharacterSet& operator=(const CharacterSet&);
+        CharacterSet& operator=(CharacterSet&&);
+
+        // Methods
+    public:
+        /**
+         * This is the default constructor.
+         */
+        CharacterSet();
+
+        /**
+         * This constructs a character set that contains
+         * just the given character.
+         *
+         * @param[in] c
+         *     This is the only character to put in the set.
+         */
+        CharacterSet(char c);
+
+        /**
+         * This constructs a character set that contains all the
+         * characters between the given "first" and "last"
+         * characters, inclusive.
+         *
+         * @param[in] first
+         *     This is the first of the range of characters
+         *     to put in the set.
+         *
+         * @param[in] last
+         *     This is the last of the range of characters
+         *     to put in the set.
+         */
+        CharacterSet(char first, char last);
+
+        /**
+         * This constructs a character set that contains all the
+         * characters in all the other given character sets.
+         *
+         * @param[in] characterSets
+         *     These are the character sets to include.
+         */
+        CharacterSet(
+            std::initializer_list< const CharacterSet > characterSets
+        );
+
+        /**
+         * This method checks to see if the given character
+         * is in the character set.
+         *
+         * @param[in] c
+         *     This is the character to check.
+         *
+         * @return
+         *     An indication of whether or not the given character
+         *     is in the character set is returned.
+         */
+        bool Contains(char c) const;
+
+        // Private Properties
+    private:
+        /**
+         * This is the type of structure that contains the private
+         * properties of the instance.  It is defined in the implementation
+         * and declared here to ensure that it is scoped inside the class.
+         */
+        struct Impl;
+
+        /**
+         * This contains the private properties of the instance.
+         */
+        std::unique_ptr< struct Impl > impl_;
+    };
+
+    /**
+     * This function determines whether or not the given character
+     * is in the given character set.
+     *
+     * @param[in] c
+     *     This is the character to check.
+     *
+     * @param[in] characterSet
+     *     This is the set of characters that are allowed.
+     *
+     * @return
+     *     An indication of whether or not the given character
+     *     is in the given character set is returned.
+     */
+    bool IsCharacterInSet(
+        char c,
+        const CharacterSet& characterSet
+    );
+
+}
+
+#endif /* URI_CHARACTER_SET_HPP */