create a C wrapper for obelisk

src/lib/include/obelisk.h

@@ -1,3 +1,6 @@
+#ifndef OBELISK_INCLUDE_OBELISK_H
+#define OBELISK_INCLUDE_OBELISK_H
+
 #include <string>
 
 /**
@@ -15,6 +18,18 @@ namespace obelisk
     class Obelisk
     {
         public:
+            /**
+             * @brief Construct a new Obelisk object.
+             *
+             */
+            Obelisk() = default;
+
+            /**
+             * @brief Destroy the Obelisk object.
+             *
+             */
+            ~Obelisk() = default;
+
             /**
              * @brief Get the obelisk version.
              *
@@ -28,5 +43,34 @@ namespace obelisk
              * @return int The version.
              */
             int getLibVersion();
+
+            /**
+             * @brief Query the Obelisk KnowledgeBase to see if the Fact is true
+             * or not.
+             *
+             * @param[in] leftEntity The left entity.
+             * @param[in] verb The verb.
+             * @param[in] rightEntity The right entity.
+             * @return double Returns a value between 0 and 1 depending on
+             * whether it is true or false.
+             */
+            double query(const std::string& leftEntity,
+                const std::string& verb,
+                const std::string& rightEntity);
+
+            /**
+             * @brief Query the Obelisk KnowledgeBase and return the suggested
+             * action to take.
+             *
+             * @param[in] leftEntity The left entity.
+             * @param[in] verb The verb.
+             * @param[in] rightEntity The right entity.
+             * @return std::string Returns the suggested action.
+             */
+            std::string query_action(const std::string& leftEntity,
+                const std::string& verb,
+                const std::string& rightEntity);
     };
 } // namespace obelisk
+
+#endif

src/lib/include/obelisk_c.h

@@ -0,0 +1,28 @@
+#ifndef OBELISK_INCLUDE_OBELISK_PROGRAM_H
+#define OBELISK_INCLUDE_OBELISK_PROGRAM_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /**
+     * @brief Get the obelisk version.
+     *
+     * @return const char* Returns a string containing the version. This must be
+     * freed by the caller.
+     */
+    extern const char* obelisk_get_version();
+
+    /**
+     * @brief Get the obelisk library so version.
+     *
+     * @return int Returns the so version.
+     */
+    extern int obelisk_get_lib_version();
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif

src/lib/include/obelisk_wrapper.h

@@ -0,0 +1,45 @@
+#ifndef OBELISK_INCLUDE_OBELISK_WRAPPER_H
+#define OBELISK_INCLUDE_OBELISK_WRAPPER_H
+
+typedef struct CObelisk CObelisk;
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+    /**
+     * @brief Create a obelisk object.
+     *
+     * @return CObelisk* Returns the obelisk object.
+     */
+    CObelisk *create_obelisk();
+
+    /**
+     * @brief Calls the obelisk method getVersion.
+     *
+     * @param[in] p_obelisk The obelisk object pointer.
+     * @return const char* Returns the version. Must be freed by caller.
+     */
+    const char *call_obelisk_getVersion(CObelisk *p_obelisk);
+
+    /**
+     * @brief Calls the obelisk method getLibVersion.
+     *
+     * @param[in] p_obelisk The obelisk object pointer.
+     * @return int Returns the library so version.
+     */
+    int call_obelisk_getLibVersion(CObelisk *p_obelisk);
+
+    /**
+     * @brief Delete a obelisk object.
+     *
+     * @param[in] p_obelisk The obelisk object pointer.
+     */
+    void destroy_obelisk(CObelisk *p_obelisk);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif