add string case conversion functions: lower and upper

1 files changed, 4 insertions, 0 deletions

diff --git a/core/src/xmake/engine.c b/core/src/xmake/engine.c
index 532be1adc..d81828f1f 100644
--- a/core/src/xmake/engine.c
+++ b/core/src/xmake/engine.c
@@ -286,6 +286,8 @@ tb_int_t xm_string_lastof(lua_State *lua);
 tb_int_t xm_string_convert(lua_State *lua);
 tb_int_t xm_string_endswith(lua_State *lua);
 tb_int_t xm_string_startswith(lua_State *lua);
+tb_int_t xm_string_lower(lua_State *lua);
+tb_int_t xm_string_upper(lua_State *lua);
 
 // the process functions
 tb_int_t xm_process_open(lua_State *lua);
@@ -589,6 +591,8 @@ static luaL_Reg const g_string_functions[] = {
     { "convert", xm_string_convert },
     { "endswith", xm_string_endswith },
     { "startswith", xm_string_startswith },
+    { "lower", xm_string_lower },
+    { "upper", xm_string_upper },
     { tb_null, tb_null },
 };