[PATCH libubox 3/4] lua/uloop: fd_add: use absolute indices for arguments

[Karl Palsson]

Instead of having to adjust the index repeatedly as the stack is
manipulated, use absolute addressing for the function arguments, so they
stay the same throughout the call.  Zero functional change, just
subjectively easier to follow variables.

Signed-off-by: Karl Palsson <karlp at etactica.com>
---
 lua/uloop.c | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)

diff --git a/lua/uloop.c b/lua/uloop.c
index 394970d..ee82104 100644
--- a/lua/uloop.c
+++ b/lua/uloop.c
@@ -233,24 +233,23 @@ static int ul_ufd_add(lua_State *L)
 	int ref;
 	int fd_ref;
 
-	flags = luaL_checkinteger(L, -1);
+	flags = luaL_checkinteger(L, 3);
 	if (!flags) {
 		lua_pushstring(L, "flags cannot be zero");
 		lua_error(L);
 	}
-	lua_pop(L, 1);
 
-	luaL_checktype(L, -1, LUA_TFUNCTION);
+	luaL_checktype(L, 2, LUA_TFUNCTION);
 
-	fd = get_sock_fd(L, -2);
+	fd = get_sock_fd(L, 1);
 
 	lua_getglobal(L, "__uloop_cb");
-	lua_pushvalue(L, -2);
+	lua_pushvalue(L, 2);
 	ref = luaL_ref(L, -2);
 	lua_pop(L, 1);
 
 	lua_getglobal(L, "__uloop_fds");
-	lua_pushvalue(L, -3);
+	lua_pushvalue(L, 1);
 	fd_ref = luaL_ref(L, -2);
 	lua_pop(L, 1);
 
-- 
2.21.3