theseus_mlua_sys/luau/
lua.rs

1//! Contains definitions from `lua.h`.
2
3use std::ffi::CStr;
4use std::marker::{PhantomData, PhantomPinned};
5use std::os::raw::{c_char, c_double, c_float, c_int, c_uint, c_void};
6use std::{mem, ptr};
7
8// Option for multiple returns in 'lua_pcall' and 'lua_call'
9pub const LUA_MULTRET: c_int = -1;
10
11// Max number of Lua stack slots
12const LUAI_MAXCSTACK: c_int = 1000000;
13
14// Number of valid Lua userdata tags
15pub const LUA_UTAG_LIMIT: c_int = 128;
16
17// Number of valid Lua lightuserdata tags
18pub const LUA_LUTAG_LIMIT: c_int = 128;
19
20//
21// Pseudo-indices
22//
23pub const LUA_REGISTRYINDEX: c_int = -LUAI_MAXCSTACK - 2000;
24pub const LUA_ENVIRONINDEX: c_int = -LUAI_MAXCSTACK - 2001;
25pub const LUA_GLOBALSINDEX: c_int = -LUAI_MAXCSTACK - 2002;
26
27pub const fn lua_upvalueindex(i: c_int) -> c_int {
28    LUA_GLOBALSINDEX - i
29}
30
31//
32// Thread status
33//
34pub const LUA_OK: c_int = 0;
35pub const LUA_YIELD: c_int = 1;
36pub const LUA_ERRRUN: c_int = 2;
37pub const LUA_ERRSYNTAX: c_int = 3;
38pub const LUA_ERRMEM: c_int = 4;
39pub const LUA_ERRERR: c_int = 5;
40
41/// A raw Lua state associated with a thread.
42#[repr(C)]
43pub struct lua_State {
44    _data: [u8; 0],
45    _marker: PhantomData<(*mut u8, PhantomPinned)>,
46}
47
48//
49// Basic types
50//
51pub const LUA_TNONE: c_int = -1;
52
53pub const LUA_TNIL: c_int = 0;
54pub const LUA_TBOOLEAN: c_int = 1;
55
56pub const LUA_TLIGHTUSERDATA: c_int = 2;
57pub const LUA_TNUMBER: c_int = 3;
58pub const LUA_TVECTOR: c_int = 4;
59
60pub const LUA_TSTRING: c_int = 5;
61pub const LUA_TTABLE: c_int = 6;
62pub const LUA_TFUNCTION: c_int = 7;
63pub const LUA_TUSERDATA: c_int = 8;
64pub const LUA_TTHREAD: c_int = 9;
65pub const LUA_TBUFFER: c_int = 10;
66
67/// Guaranteed number of Lua stack slots available to a C function.
68pub const LUA_MINSTACK: c_int = 20;
69
70/// A Lua number, usually equivalent to `f64`.
71pub type lua_Number = c_double;
72
73/// A Lua integer, usually equivalent to `i64`
74#[cfg(target_pointer_width = "32")]
75pub type lua_Integer = i32;
76#[cfg(target_pointer_width = "64")]
77pub type lua_Integer = i64;
78
79/// A Lua unsigned integer, equivalent to `u32`.
80pub type lua_Unsigned = c_uint;
81
82/// Type for native C functions that can be passed to Lua.
83pub type lua_CFunction = unsafe extern "C-unwind" fn(L: *mut lua_State) -> c_int;
84pub type lua_Continuation = unsafe extern "C-unwind" fn(L: *mut lua_State, status: c_int) -> c_int;
85
86/// Type for userdata destructor functions (no unwinding).
87pub type lua_Destructor = unsafe extern "C" fn(L: *mut lua_State, *mut c_void);
88
89/// Type for memory-allocation functions (no unwinding).
90pub type lua_Alloc =
91    unsafe extern "C" fn(ud: *mut c_void, ptr: *mut c_void, osize: usize, nsize: usize) -> *mut c_void;
92
93/// Returns Luau release version (eg. `0.xxx`).
94pub const fn luau_version() -> Option<&'static str> {
95    option_env!("LUAU_VERSION")
96}
97
98unsafe extern "C-unwind" {
99    //
100    // State manipulation
101    //
102    pub fn lua_newstate(f: lua_Alloc, ud: *mut c_void) -> *mut lua_State;
103    pub fn lua_close(L: *mut lua_State);
104    pub fn lua_newthread(L: *mut lua_State) -> *mut lua_State;
105    pub fn lua_mainthread(L: *mut lua_State) -> *mut lua_State;
106    pub fn lua_resetthread(L: *mut lua_State);
107    pub fn lua_isthreadreset(L: *mut lua_State) -> c_int;
108
109    //
110    // Basic stack manipulation
111    //
112    pub fn lua_absindex(L: *mut lua_State, idx: c_int) -> c_int;
113    pub fn lua_gettop(L: *mut lua_State) -> c_int;
114    pub fn lua_settop(L: *mut lua_State, idx: c_int);
115    pub fn lua_pushvalue(L: *mut lua_State, idx: c_int);
116    pub fn lua_remove(L: *mut lua_State, idx: c_int);
117    pub fn lua_insert(L: *mut lua_State, idx: c_int);
118    pub fn lua_replace(L: *mut lua_State, idx: c_int);
119    pub fn lua_checkstack(L: *mut lua_State, sz: c_int) -> c_int;
120    pub fn lua_rawcheckstack(L: *mut lua_State, sz: c_int);
121
122    pub fn lua_xmove(from: *mut lua_State, to: *mut lua_State, n: c_int);
123    pub fn lua_xpush(from: *mut lua_State, to: *mut lua_State, idx: c_int);
124
125    //
126    // Access functions (stack -> C)
127    //
128    pub fn lua_isnumber(L: *mut lua_State, idx: c_int) -> c_int;
129    pub fn lua_isstring(L: *mut lua_State, idx: c_int) -> c_int;
130    pub fn lua_iscfunction(L: *mut lua_State, idx: c_int) -> c_int;
131    pub fn lua_isLfunction(L: *mut lua_State, idx: c_int) -> c_int;
132    pub fn lua_isuserdata(L: *mut lua_State, idx: c_int) -> c_int;
133    pub fn lua_type(L: *mut lua_State, idx: c_int) -> c_int;
134    pub fn lua_typename(L: *mut lua_State, tp: c_int) -> *const c_char;
135
136    pub fn lua_equal(L: *mut lua_State, idx1: c_int, idx2: c_int) -> c_int;
137    pub fn lua_rawequal(L: *mut lua_State, idx1: c_int, idx2: c_int) -> c_int;
138    pub fn lua_lessthan(L: *mut lua_State, idx1: c_int, idx2: c_int) -> c_int;
139
140    pub fn lua_tonumberx(L: *mut lua_State, idx: c_int, isnum: *mut c_int) -> lua_Number;
141    #[link_name = "lua_tointegerx"]
142    pub fn lua_tointegerx_(L: *mut lua_State, idx: c_int, isnum: *mut c_int) -> c_int;
143    pub fn lua_tounsignedx(L: *mut lua_State, idx: c_int, isnum: *mut c_int) -> lua_Unsigned;
144    pub fn lua_tovector(L: *mut lua_State, idx: c_int) -> *const c_float;
145    pub fn lua_toboolean(L: *mut lua_State, idx: c_int) -> c_int;
146    pub fn lua_tolstring(L: *mut lua_State, idx: c_int, len: *mut usize) -> *const c_char;
147    pub fn lua_tostringatom(L: *mut lua_State, idx: c_int, atom: *mut c_int) -> *const c_char;
148    pub fn lua_namecallatom(L: *mut lua_State, atom: *mut c_int) -> *const c_char;
149    pub fn lua_objlen(L: *mut lua_State, idx: c_int) -> usize;
150    pub fn lua_tocfunction(L: *mut lua_State, idx: c_int) -> Option<lua_CFunction>;
151    pub fn lua_tolightuserdata(L: *mut lua_State, idx: c_int) -> *mut c_void;
152    pub fn lua_tolightuserdatatagged(L: *mut lua_State, idx: c_int, tag: c_int) -> *mut c_void;
153    pub fn lua_touserdata(L: *mut lua_State, idx: c_int) -> *mut c_void;
154    pub fn lua_touserdatatagged(L: *mut lua_State, idx: c_int, tag: c_int) -> *mut c_void;
155    pub fn lua_userdatatag(L: *mut lua_State, idx: c_int) -> c_int;
156    pub fn lua_lightuserdatatag(L: *mut lua_State, idx: c_int) -> c_int;
157    pub fn lua_tothread(L: *mut lua_State, idx: c_int) -> *mut lua_State;
158    pub fn lua_tobuffer(L: *mut lua_State, idx: c_int, len: *mut usize) -> *mut c_void;
159    pub fn lua_topointer(L: *mut lua_State, idx: c_int) -> *const c_void;
160
161    //
162    // Push functions (C -> stack)
163    //
164    pub fn lua_pushnil(L: *mut lua_State);
165    pub fn lua_pushnumber(L: *mut lua_State, n: lua_Number);
166    #[link_name = "lua_pushinteger"]
167    pub fn lua_pushinteger_(L: *mut lua_State, n: c_int);
168    pub fn lua_pushunsigned(L: *mut lua_State, n: lua_Unsigned);
169    #[cfg(not(feature = "luau-vector4"))]
170    pub fn lua_pushvector(L: *mut lua_State, x: c_float, y: c_float, z: c_float);
171    #[cfg(feature = "luau-vector4")]
172    pub fn lua_pushvector(L: *mut lua_State, x: c_float, y: c_float, z: c_float, w: c_float);
173    #[link_name = "lua_pushlstring"]
174    pub fn lua_pushlstring_(L: *mut lua_State, s: *const c_char, l: usize);
175    #[link_name = "lua_pushstring"]
176    pub fn lua_pushstring_(L: *mut lua_State, s: *const c_char);
177    // lua_pushvfstring
178    #[link_name = "lua_pushfstringL"]
179    pub fn lua_pushfstring(L: *mut lua_State, fmt: *const c_char, ...) -> *const c_char;
180    pub fn lua_pushcclosurek(
181        L: *mut lua_State,
182        f: lua_CFunction,
183        debugname: *const c_char,
184        nup: c_int,
185        cont: Option<lua_Continuation>,
186    );
187    pub fn lua_pushboolean(L: *mut lua_State, b: c_int);
188    pub fn lua_pushthread(L: *mut lua_State) -> c_int;
189
190    pub fn lua_pushlightuserdatatagged(L: *mut lua_State, p: *mut c_void, tag: c_int);
191    pub fn lua_newuserdatatagged(L: *mut lua_State, sz: usize, tag: c_int) -> *mut c_void;
192    pub fn lua_newuserdatataggedwithmetatable(L: *mut lua_State, sz: usize, tag: c_int) -> *mut c_void;
193    pub fn lua_newuserdatadtor(L: *mut lua_State, sz: usize, dtor: lua_Destructor) -> *mut c_void;
194
195    pub fn lua_newbuffer(L: *mut lua_State, sz: usize) -> *mut c_void;
196
197    //
198    // Get functions (Lua -> stack)
199    //
200    pub fn lua_gettable(L: *mut lua_State, idx: c_int) -> c_int;
201    pub fn lua_getfield(L: *mut lua_State, idx: c_int, k: *const c_char) -> c_int;
202    pub fn lua_rawgetfield(L: *mut lua_State, idx: c_int, k: *const c_char) -> c_int;
203    pub fn lua_rawget(L: *mut lua_State, idx: c_int) -> c_int;
204    #[link_name = "lua_rawgeti"]
205    pub fn lua_rawgeti_(L: *mut lua_State, idx: c_int, n: c_int) -> c_int;
206    pub fn lua_createtable(L: *mut lua_State, narr: c_int, nrec: c_int);
207
208    pub fn lua_setreadonly(L: *mut lua_State, idx: c_int, enabled: c_int);
209    pub fn lua_getreadonly(L: *mut lua_State, idx: c_int) -> c_int;
210    pub fn lua_setsafeenv(L: *mut lua_State, idx: c_int, enabled: c_int);
211
212    pub fn lua_getmetatable(L: *mut lua_State, objindex: c_int) -> c_int;
213    pub fn lua_getfenv(L: *mut lua_State, idx: c_int);
214
215    //
216    // Set functions (stack -> Lua)
217    //
218    pub fn lua_settable(L: *mut lua_State, idx: c_int);
219    pub fn lua_setfield(L: *mut lua_State, idx: c_int, k: *const c_char);
220    pub fn lua_rawset(L: *mut lua_State, idx: c_int);
221    #[link_name = "lua_rawseti"]
222    pub fn lua_rawseti_(L: *mut lua_State, idx: c_int, n: c_int);
223    pub fn lua_setmetatable(L: *mut lua_State, objindex: c_int) -> c_int;
224    pub fn lua_setfenv(L: *mut lua_State, idx: c_int) -> c_int;
225
226    //
227    // `load' and `call' functions (load and run Luau bytecode)
228    //
229    pub fn luau_load(
230        L: *mut lua_State,
231        chunkname: *const c_char,
232        data: *const c_char,
233        size: usize,
234        env: c_int,
235    ) -> c_int;
236    pub fn lua_call(L: *mut lua_State, nargs: c_int, nresults: c_int);
237    pub fn lua_pcall(L: *mut lua_State, nargs: c_int, nresults: c_int, errfunc: c_int) -> c_int;
238    pub fn lua_cpcall(L: *mut lua_State, f: lua_CFunction, ud: *mut c_void) -> c_int;
239
240    //
241    // Coroutine functions
242    //
243    pub fn lua_yield(L: *mut lua_State, nresults: c_int) -> c_int;
244    pub fn lua_break(L: *mut lua_State) -> c_int;
245    #[link_name = "lua_resume"]
246    pub fn lua_resume_(L: *mut lua_State, from: *mut lua_State, narg: c_int) -> c_int;
247    pub fn lua_resumeerror(L: *mut lua_State, from: *mut lua_State) -> c_int;
248    pub fn lua_status(L: *mut lua_State) -> c_int;
249    pub fn lua_isyieldable(L: *mut lua_State) -> c_int;
250    pub fn lua_getthreaddata(L: *mut lua_State) -> *mut c_void;
251    pub fn lua_setthreaddata(L: *mut lua_State, data: *mut c_void);
252}
253
254//
255// Garbage-collection function and options
256//
257pub const LUA_GCSTOP: c_int = 0;
258pub const LUA_GCRESTART: c_int = 1;
259pub const LUA_GCCOLLECT: c_int = 2;
260pub const LUA_GCCOUNT: c_int = 3;
261pub const LUA_GCCOUNTB: c_int = 4;
262pub const LUA_GCISRUNNING: c_int = 5;
263pub const LUA_GCSTEP: c_int = 6;
264pub const LUA_GCSETGOAL: c_int = 7;
265pub const LUA_GCSETSTEPMUL: c_int = 8;
266pub const LUA_GCSETSTEPSIZE: c_int = 9;
267
268unsafe extern "C-unwind" {
269    pub fn lua_gc(L: *mut lua_State, what: c_int, data: c_int) -> c_int;
270}
271
272//
273// Memory statistics
274//
275unsafe extern "C-unwind" {
276    pub fn lua_setmemcat(L: *mut lua_State, category: c_int);
277    pub fn lua_totalbytes(L: *mut lua_State, category: c_int) -> usize;
278}
279
280//
281// Miscellaneous functions
282//
283unsafe extern "C-unwind" {
284    pub fn lua_error(L: *mut lua_State) -> !;
285    pub fn lua_next(L: *mut lua_State, idx: c_int) -> c_int;
286    pub fn lua_rawiter(L: *mut lua_State, idx: c_int, iter: c_int) -> c_int;
287    pub fn lua_concat(L: *mut lua_State, n: c_int);
288    // TODO: lua_encodepointer
289    pub fn lua_clock() -> c_double;
290    pub fn lua_setuserdatatag(L: *mut lua_State, idx: c_int, tag: c_int);
291    pub fn lua_setuserdatadtor(L: *mut lua_State, tag: c_int, dtor: Option<lua_Destructor>);
292    pub fn lua_getuserdatadtor(L: *mut lua_State, tag: c_int) -> Option<lua_Destructor>;
293    pub fn lua_setuserdatametatable(L: *mut lua_State, tag: c_int);
294    pub fn lua_getuserdatametatable(L: *mut lua_State, tag: c_int);
295    pub fn lua_setlightuserdataname(L: *mut lua_State, tag: c_int, name: *const c_char);
296    pub fn lua_getlightuserdataname(L: *mut lua_State, tag: c_int) -> *const c_char;
297    pub fn lua_clonefunction(L: *mut lua_State, idx: c_int);
298    pub fn lua_cleartable(L: *mut lua_State, idx: c_int);
299    pub fn lua_getallocf(L: *mut lua_State, ud: *mut *mut c_void) -> lua_Alloc;
300}
301
302//
303// Reference system, can be used to pin objects
304//
305pub const LUA_NOREF: c_int = -1;
306pub const LUA_REFNIL: c_int = 0;
307
308unsafe extern "C-unwind" {
309    pub fn lua_ref(L: *mut lua_State, idx: c_int) -> c_int;
310    pub fn lua_unref(L: *mut lua_State, r#ref: c_int);
311}
312
313//
314// Some useful macros (implemented as Rust functions)
315//
316
317#[inline(always)]
318pub unsafe fn lua_tonumber(L: *mut lua_State, idx: c_int) -> lua_Number {
319    lua_tonumberx(L, idx, ptr::null_mut())
320}
321
322#[inline(always)]
323pub unsafe fn lua_tointeger_(L: *mut lua_State, idx: c_int) -> c_int {
324    lua_tointegerx_(L, idx, ptr::null_mut())
325}
326
327#[inline(always)]
328pub unsafe fn lua_tounsigned(L: *mut lua_State, i: c_int) -> lua_Unsigned {
329    lua_tounsignedx(L, i, ptr::null_mut())
330}
331
332#[inline(always)]
333pub unsafe fn lua_pop(L: *mut lua_State, n: c_int) {
334    lua_settop(L, -n - 1)
335}
336
337#[inline(always)]
338pub unsafe fn lua_newtable(L: *mut lua_State) {
339    lua_createtable(L, 0, 0)
340}
341
342#[inline(always)]
343pub unsafe fn lua_newuserdata(L: *mut lua_State, sz: usize) -> *mut c_void {
344    lua_newuserdatatagged(L, sz, 0)
345}
346
347#[inline(always)]
348pub unsafe fn lua_newuserdata_t<T>(L: *mut lua_State, data: T) -> *mut T {
349    unsafe extern "C" fn destructor<T>(_: *mut lua_State, ud: *mut c_void) {
350        ptr::drop_in_place(ud as *mut T);
351    }
352
353    let ud_ptr = lua_newuserdatadtor(L, const { mem::size_of::<T>() }, destructor::<T>) as *mut T;
354    ptr::write(ud_ptr, data);
355    ud_ptr
356}
357
358// TODO: lua_strlen
359
360#[inline(always)]
361pub unsafe fn lua_isfunction(L: *mut lua_State, n: c_int) -> c_int {
362    (lua_type(L, n) == LUA_TFUNCTION) as c_int
363}
364
365#[inline(always)]
366pub unsafe fn lua_istable(L: *mut lua_State, n: c_int) -> c_int {
367    (lua_type(L, n) == LUA_TTABLE) as c_int
368}
369
370#[inline(always)]
371pub unsafe fn lua_islightuserdata(L: *mut lua_State, n: c_int) -> c_int {
372    (lua_type(L, n) == LUA_TLIGHTUSERDATA) as c_int
373}
374
375#[inline(always)]
376pub unsafe fn lua_isnil(L: *mut lua_State, n: c_int) -> c_int {
377    (lua_type(L, n) == LUA_TNIL) as c_int
378}
379
380#[inline(always)]
381pub unsafe fn lua_isboolean(L: *mut lua_State, n: c_int) -> c_int {
382    (lua_type(L, n) == LUA_TBOOLEAN) as c_int
383}
384
385#[inline(always)]
386pub unsafe fn lua_isvector(L: *mut lua_State, n: c_int) -> c_int {
387    (lua_type(L, n) == LUA_TVECTOR) as c_int
388}
389
390#[inline(always)]
391pub unsafe fn lua_isthread(L: *mut lua_State, n: c_int) -> c_int {
392    (lua_type(L, n) == LUA_TTHREAD) as c_int
393}
394
395#[inline(always)]
396pub unsafe fn lua_isbuffer(L: *mut lua_State, n: c_int) -> c_int {
397    (lua_type(L, n) == LUA_TBUFFER) as c_int
398}
399
400#[inline(always)]
401pub unsafe fn lua_isnone(L: *mut lua_State, n: c_int) -> c_int {
402    (lua_type(L, n) == LUA_TNONE) as c_int
403}
404
405#[inline(always)]
406pub unsafe fn lua_isnoneornil(L: *mut lua_State, n: c_int) -> c_int {
407    (lua_type(L, n) <= LUA_TNIL) as c_int
408}
409
410#[inline(always)]
411pub unsafe fn lua_pushliteral(L: *mut lua_State, s: &'static CStr) {
412    lua_pushstring_(L, s.as_ptr());
413}
414
415#[inline(always)]
416pub unsafe fn lua_pushcfunction(L: *mut lua_State, f: lua_CFunction) {
417    lua_pushcclosurek(L, f, ptr::null(), 0, None)
418}
419
420#[inline(always)]
421pub unsafe fn lua_pushcfunctiond(L: *mut lua_State, f: lua_CFunction, debugname: *const c_char) {
422    lua_pushcclosurek(L, f, debugname, 0, None)
423}
424
425#[inline(always)]
426pub unsafe fn lua_pushcclosure(L: *mut lua_State, f: lua_CFunction, nup: c_int) {
427    lua_pushcclosurek(L, f, ptr::null(), nup, None)
428}
429
430#[inline(always)]
431pub unsafe fn lua_pushcclosured(L: *mut lua_State, f: lua_CFunction, debugname: *const c_char, nup: c_int) {
432    lua_pushcclosurek(L, f, debugname, nup, None)
433}
434
435#[inline(always)]
436pub unsafe fn lua_pushlightuserdata(L: *mut lua_State, p: *mut c_void) {
437    lua_pushlightuserdatatagged(L, p, 0)
438}
439
440#[inline(always)]
441pub unsafe fn lua_setglobal(L: *mut lua_State, var: *const c_char) {
442    lua_setfield(L, LUA_GLOBALSINDEX, var)
443}
444
445#[inline(always)]
446pub unsafe fn lua_getglobal(L: *mut lua_State, var: *const c_char) -> c_int {
447    lua_getfield(L, LUA_GLOBALSINDEX, var)
448}
449
450#[inline(always)]
451pub unsafe fn lua_tostring(L: *mut lua_State, i: c_int) -> *const c_char {
452    lua_tolstring(L, i, ptr::null_mut())
453}
454
455//
456// Debug API
457//
458
459// Maximum size for the description of the source of a function in debug information.
460const LUA_IDSIZE: usize = 256;
461
462/// Type for functions to be called on debug events.
463pub type lua_Hook = unsafe extern "C-unwind" fn(L: *mut lua_State, ar: *mut lua_Debug);
464
465pub type lua_Coverage = unsafe extern "C-unwind" fn(
466    context: *mut c_void,
467    function: *const c_char,
468    linedefined: c_int,
469    depth: c_int,
470    hits: *const c_int,
471    size: usize,
472);
473
474unsafe extern "C-unwind" {
475    pub fn lua_stackdepth(L: *mut lua_State) -> c_int;
476    pub fn lua_getinfo(L: *mut lua_State, level: c_int, what: *const c_char, ar: *mut lua_Debug) -> c_int;
477    pub fn lua_getargument(L: *mut lua_State, level: c_int, n: c_int) -> c_int;
478    pub fn lua_getlocal(L: *mut lua_State, level: c_int, n: c_int) -> *const c_char;
479    pub fn lua_setlocal(L: *mut lua_State, level: c_int, n: c_int) -> *const c_char;
480    pub fn lua_getupvalue(L: *mut lua_State, funcindex: c_int, n: c_int) -> *const c_char;
481    pub fn lua_setupvalue(L: *mut lua_State, funcindex: c_int, n: c_int) -> *const c_char;
482
483    pub fn lua_singlestep(L: *mut lua_State, enabled: c_int);
484    pub fn lua_breakpoint(L: *mut lua_State, funcindex: c_int, line: c_int, enabled: c_int) -> c_int;
485
486    pub fn lua_getcoverage(L: *mut lua_State, funcindex: c_int, context: *mut c_void, callback: lua_Coverage);
487
488    pub fn lua_debugtrace(L: *mut lua_State) -> *const c_char;
489}
490
491#[repr(C)]
492pub struct lua_Debug {
493    pub name: *const c_char,
494    pub what: *const c_char,
495    pub source: *const c_char,
496    pub short_src: *const c_char,
497    pub linedefined: c_int,
498    pub currentline: c_int,
499    pub nupvals: u8,
500    pub nparams: u8,
501    pub isvararg: c_char,
502    pub userdata: *mut c_void,
503    pub ssbuf: [c_char; LUA_IDSIZE],
504}
505
506//
507// Callbacks that can be used to reconfigure behavior of the VM dynamically.
508// These are shared between all coroutines.
509//
510
511#[repr(C)]
512#[non_exhaustive]
513pub struct lua_Callbacks {
514    /// arbitrary userdata pointer that is never overwritten by Luau
515    pub userdata: *mut c_void,
516
517    /// gets called at safepoints (loop back edges, call/ret, gc) if set
518    pub interrupt: Option<unsafe extern "C-unwind" fn(L: *mut lua_State, gc: c_int)>,
519    /// gets called when an unprotected error is raised (if longjmp is used)
520    pub panic: Option<unsafe extern "C-unwind" fn(L: *mut lua_State, errcode: c_int)>,
521
522    /// gets called when L is created (LP == parent) or destroyed (LP == NULL)
523    pub userthread: Option<unsafe extern "C-unwind" fn(LP: *mut lua_State, L: *mut lua_State)>,
524    /// gets called when a string is created; returned atom can be retrieved via tostringatom
525    pub useratom: Option<unsafe extern "C-unwind" fn(s: *const c_char, l: usize) -> i16>,
526
527    /// gets called when BREAK instruction is encountered
528    pub debugbreak: Option<unsafe extern "C-unwind" fn(L: *mut lua_State, ar: *mut lua_Debug)>,
529    /// gets called after each instruction in single step mode
530    pub debugstep: Option<unsafe extern "C-unwind" fn(L: *mut lua_State, ar: *mut lua_Debug)>,
531    /// gets called when thread execution is interrupted by break in another thread
532    pub debuginterrupt: Option<unsafe extern "C-unwind" fn(L: *mut lua_State, ar: *mut lua_Debug)>,
533    /// gets called when protected call results in an error
534    pub debugprotectederror: Option<unsafe extern "C-unwind" fn(L: *mut lua_State)>,
535
536    /// gets called when memory is allocated
537    pub onallocate: Option<unsafe extern "C-unwind" fn(L: *mut lua_State, osize: usize, nsize: usize)>,
538}
539
540unsafe extern "C" {
541    pub fn lua_callbacks(L: *mut lua_State) -> *mut lua_Callbacks;
542}
543
544// Functions from customization lib
545unsafe extern "C" {
546    pub fn luau_setfflag(name: *const c_char, value: c_int) -> c_int;
547    pub fn lua_getmetatablepointer(L: *mut lua_State, idx: c_int) -> *const c_void;
548}
theseus_mlua_sys/luau/lua.rs

theseus_mlua_sys/luau/
lua.rs
