add honey_lua.h and honey_lua.h

2 files changed, 86 insertions, 0 deletions

diff --git a/src/lua/honey_lua.c b/src/lua/honey_lua.c
new file mode 100644
index 0000000..36ca335
--- /dev/null
+++ b/src/lua/honey_lua.c
@@ -0,0 +1,40 @@
+#include "honey_lua.h"
+
+void honey_lua_create_table(lua_State* L,
+			    honey_lua_element* elements,
+			    unsigned int n_elements)
+{
+    lua_createtable(L, 0, n_elements);
+
+    for (int i=0; i<n_elements; i++) {
+	honey_lua_push_element(L, elements[i]);
+	lua_setfield(L, -2, elements[i].name);
+    }
+}
+
+/* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */
+
+void honey_lua_push_element(lua_State* L, honey_lua_element element)
+{
+    switch(element.type) {
+    case HONEY_INT:
+	lua_pushinteger(L, element.data.integer);
+	break;
+
+    case HONEY_NUM:
+	lua_pushnumber(L, element.data.number);
+	break;
+
+    case HONEY_STRING:
+	lua_pushstring(L, element.data.string);
+	break;
+
+    case HONEY_FUNC:
+	lua_pushcfunction(L, element.data.function);
+	break;
+
+    default:
+	// this should never happen
+	break;
+    }
+}
diff --git a/src/lua/honey_lua.h b/src/lua/honey_lua.h
new file mode 100644
index 0000000..90fc2c7
--- /dev/null
+++ b/src/lua/honey_lua.h
@@ -0,0 +1,46 @@
+#ifndef HONEY_LUA_H
+#define HONEY_LUA_H
+
+#include "../common.h"
+
+typedef enum {
+    HONEY_INT,
+    HONEY_NUM,
+    HONEY_STRING,
+    HONEY_FUNC
+} honey_lua_type;
+
+typedef struct {
+    char* name;
+    honey_lua_type type;
+    union {
+	int integer;
+	double number;
+	char* string;
+	int (*function)(lua_State*);
+    } data;
+} honey_lua_element;
+
+/** @brief Push an element to the lua stack.
+ *
+ * @param[in] L The lua state to push the element to.
+ * @param[in] element The honey_lua_element to push to the stack.
+ *
+ * @returns Nothing.
+ */
+void honey_lua_push_element(lua_State* L,
+			    honey_lua_element element);
+
+/** @brief Create a lua table populated with various elements.
+ *
+ * @param[in] L The lua state to push the table to.
+ * @param[in] elements Array of elements to populate the table.
+ * @param[in] n_elements The number of elements in the array.
+ *
+ * @returns Nothing.
+ */
+void honey_lua_create_table(lua_State* L,
+			    honey_lua_element* elements,
+			    unsigned int n_elements);
+
+#endif