luaur_vm/functions/
str_reverse.rs

1//! Node: `cxx:Function:Luau.VM:VM/src/lstrlib.cpp:47:str_reverse`
2//!
3//! `string.reverse` — copy the argument bytes into a fresh buffer back-to-front.
4
5use crate::functions::lua_l_buffinitsize::lua_l_buffinitsize;
6use crate::functions::lua_l_checklstring::lua_l_checklstring;
7use crate::functions::lua_l_pushresultsize::lua_l_pushresultsize;
8use crate::records::lua_l_strbuf::LuaLStrbuf;
9use crate::type_aliases::lua_state::lua_State;
10use core::ffi::c_int;
11
12pub fn str_reverse(L: *mut lua_State) -> c_int {
13    unsafe {
14        let mut len: usize = 0;
15        let s = lua_l_checklstring(L, 1, &mut len);
16
17        let mut b: LuaLStrbuf = LuaLStrbuf {
18            p: core::ptr::null_mut(),
19            end: core::ptr::null_mut(),
20            L: core::ptr::null_mut(),
21            storage: core::ptr::null_mut(),
22            buffer: [0; 512],
23        };
24        let ptr = lua_l_buffinitsize(L, &mut b, len);
25
26        for i in 0..len {
27            *ptr.add(i) = *s.add(len - 1 - i);
28        }
29
30        lua_l_pushresultsize(&mut b, len);
31        1
32    }
33}
luaur_vm/functions/str_reverse.rs

luaur_vm/functions/
str_reverse.rs
