add append_table()

4 files changed, 76 insertions, 0 deletions

diff --git a/src/util/CMakeLists.txt b/src/util/CMakeLists.txt
new file mode 100644
index 0000000..5a01ec6
--- /dev/null
+++ b/src/util/CMakeLists.txt
@@ -0,0 +1,9 @@
+project(honey_engine)
+
+target_sources(honey PUBLIC
+	${CMAKE_CURRENT_LIST_DIR}/util.c
+)
+
+target_sources(test PUBLIC
+	${CMAKE_CURRENT_LIST_DIR}/util.test.c
+)
diff --git a/src/util/util.c b/src/util/util.c
new file mode 100644
index 0000000..84edd27
--- /dev/null
+++ b/src/util/util.c
@@ -0,0 +1,12 @@
+#include <lua.h>
+
+void append_table(lua_State *L, int tbl_a, int tbl_b)
+{
+	lua_pushnil(L);
+	while(lua_next(L, tbl_b) != 0) {
+		lua_pushvalue(L, -2); // key
+		lua_pushvalue(L, -2); // value
+		lua_settable(L, tbl_a);
+		lua_pop(L, 1);
+	}
+}
diff --git a/src/util/util.h b/src/util/util.h
new file mode 100644
index 0000000..3ef4e0b
--- /dev/null
+++ b/src/util/util.h
@@ -0,0 +1,8 @@
+#ifndef HONEY_UTIL_H
+#define HONEY_UTIL_H
+
+#include <lua.h>
+
+void append_table(lua_State *L, int tbl_a, int tbl_b);
+
+#endif
diff --git a/src/util/util.test.c b/src/util/util.test.c
new file mode 100644
index 0000000..b4029d2
--- /dev/null
+++ b/src/util/util.test.c
@@ -0,0 +1,47 @@
+#include <lua.h>
+#include <lauxlib.h>
+#include <honeysuckle.h>
+#include "test/honey-test.h"
+
+
+#include "util.c"
+
+
+void test_append_table()
+{
+	lua_State *L = luaL_newstate();
+	int a = hs_create_table(L,
+		hs_str_int("one", 1),
+		hs_str_int("two", 2),
+	);
+	int b = hs_create_table(L,
+		hs_str_int("three", 3),
+		hs_str_int("four", 4),
+		hs_int_int(15, 2),
+	);
+	append_table(L, a, b);
+
+	lua_getfield(L, a, "one");
+	lily_assert_int_equal(lua_tointeger(L, -1), 1);
+	
+	lua_getfield(L, a, "two");
+	lily_assert_int_equal(lua_tointeger(L, -1), 2);
+	
+	lua_getfield(L, a, "three");
+	lily_assert_int_equal(lua_tointeger(L, -1), 3);
+
+	lua_getfield(L, a, "four");
+	lily_assert_int_equal(lua_tointeger(L, -1), 4);
+
+	lua_pushinteger(L, 15);
+	lua_gettable(L, a);
+	lily_assert_int_equal(lua_tointeger(L, -1), 2);
+
+	lua_close(L);
+}
+
+
+void suite_util()
+{
+	lily_run_test(test_append_table);
+}