Skip to main content

luaur_vm/functions/
lua_tobuffer.rs

1use core::ffi::{c_int, c_void};
2
3use crate::functions::index_2_addr::index2addr;
4use crate::macros::bufvalue::bufvalue;
5use crate::macros::ttisbuffer::ttisbuffer;
6use crate::type_aliases::lua_state::lua_State;
7use crate::type_aliases::stk_id::StkId;
8
9#[allow(non_snake_case)]
10pub unsafe fn lua_tobuffer(L: *mut lua_State, idx: c_int, len: *mut usize) -> *mut c_void {
11    let o: StkId = index2addr(L, idx);
12
13    if !ttisbuffer!(o) {
14        return core::ptr::null_mut();
15    }
16
17    let b = bufvalue!(o);
18
19    if !len.is_null() {
20        *len = (*b).len as usize;
21    }
22
23    (*b).data.as_ptr() as *mut c_void
24}