luaur-vm 0.1.1

The Luau register virtual machine and standard library (Rust).
Documentation 
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use crate::functions::lua_l_checkinteger_64::lua_l_checkinteger_64;
use crate::functions::lua_pushinteger_64::lua_pushinteger_64;
use crate::type_aliases::lua_state::LuaState;

#[no_mangle]
pub unsafe fn int64_lrotate(l: *mut LuaState) -> core::ffi::c_int {
    let n = lua_l_checkinteger_64(l, 1) as u64;
    let s = (lua_l_checkinteger_64(l, 2) as u64 % 64) as u32;

    let result = if s != 0 {
        (n << s) | (n >> (64 - s))
    } else {
        n
    };

    lua_pushinteger_64(l, result as i64);

    1
}