From d1413ea013ff7ee92ea935ad7e3a3460dda3cf05 Mon Sep 17 00:00:00 2001
From: William Venner <william@venner.io>
Date: Sun, 10 Oct 2021 19:59:54 +0100
Subject: [PATCH] Add `lua_topointer`

---
 gmod/src/lua/import.rs    | 2 ++
 gmod/src/lua/lua_state.rs | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/gmod/src/lua/import.rs b/gmod/src/lua/import.rs
index c2767e9..979f534 100644
--- a/gmod/src/lua/import.rs
+++ b/gmod/src/lua/import.rs
@@ -124,6 +124,7 @@ pub(crate) struct LuaShared {
 	pub lua_getinfo: Symbol<'static, unsafe extern "C-unwind" fn(state: LuaState, what: LuaString, ar: *mut LuaDebug) -> i32>,
 	pub lua_getstack: Symbol<'static, unsafe extern "C-unwind" fn(state: LuaState, level: i32, ar: *mut LuaDebug) -> i32>,
 	pub lua_next: Symbol<'static, unsafe extern "C-unwind" fn(state: LuaState, index: i32) -> i32>,
+	pub lua_topointer: Symbol<'static, unsafe extern "C-unwind" fn(state: LuaState, index: i32) -> *const c_void>,
 }
 unsafe impl Sync for LuaShared {}
 impl LuaShared {
@@ -188,6 +189,7 @@ impl LuaShared {
 				lua_getinfo: find_symbol!("lua_getinfo"),
 				lua_getstack: find_symbol!("lua_getstack"),
 				lua_next: find_symbol!("lua_next"),
+				lua_topointer: find_symbol!("lua_topointer")
 			}
 		}
 	}
diff --git a/gmod/src/lua/lua_state.rs b/gmod/src/lua/lua_state.rs
index 7534373..75f7544 100644
--- a/gmod/src/lua/lua_state.rs
+++ b/gmod/src/lua/lua_state.rs
@@ -381,6 +381,11 @@ impl LuaState {
 		(LUA_SHARED.lua_next)(*self, index)
 	}
 
+	#[inline]
+	pub unsafe fn to_pointer(&self, index: i32) -> *const c_void {
+		(LUA_SHARED.lua_topointer)(*self, index)
+	}
+
 	pub unsafe fn error<S: AsRef<str>>(&self, msg: S) -> ! {
 		self.push_string(msg.as_ref());
 		(LUA_SHARED.lua_error)(*self);