luaur-vm 0.1.0

The Luau register virtual machine and standard library (Rust).
Documentation 
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//! Node: `cxx:Function:Luau.VM:VM/src/lstate.cpp:59:f_luaopen`
//! Source: `VM/src/lstate.cpp:59-70` (hand-ported)

use crate::functions::lua_h_new::lua_h_new;
use crate::functions::lua_s_resize::luaS_resize;
use crate::functions::lua_t_init::lua_t_init;
use crate::functions::stack_init::stack_init;
use crate::macros::lua_minstrtabsize::LUA_MINSTRTABSIZE;
use crate::macros::lua_s_fix::luaS_fix;
use crate::macros::lua_s_newliteral::luaS_newliteral;
use crate::macros::registry::registry;
use crate::macros::sethvalue::sethvalue;
use crate::type_aliases::lua_state::lua_State;
use crate::type_aliases::t_value::TValue;

/// open parts that may cause memory-allocation errors
pub unsafe fn f_luaopen(L: *mut lua_State, _ud: *mut core::ffi::c_void) {
    let g = (*L).global;
    stack_init(L, L); // init stack
    (*L).gt = lua_h_new(L, 0, 2); // table of globals
    sethvalue!(
        L,
        registry!(L) as *const TValue as *mut TValue,
        lua_h_new(L, 0, 2)
    ); // registry
    luaS_resize(L, LUA_MINSTRTABSIZE); // initial size of string table
    lua_t_init(L);
    luaS_fix!(luaS_newliteral(L, c"not enough memory".as_ptr())); // LUA_MEMERRMSG // pin to make sure we can always throw this error
    luaS_fix!(luaS_newliteral(L, c"error in error handling".as_ptr())); // LUA_ERRERRMSG // pin to make sure we can always throw this error
    (*g).GCthreshold = 4 * (*g).totalbytes;
}