luaur_vm/functions/
luaopen_utf_8.rs

1use crate::functions::byteoffset::byteoffset;
2use crate::functions::codepoint::codepoint;
3use crate::functions::iter_codes::iter_codes;
4use crate::functions::lua_l_register::lua_l_register;
5use crate::functions::lua_pushlstring::lua_pushlstring;
6use crate::functions::lua_setfield::lua_setfield;
7use crate::functions::utfchar::utfchar;
8use crate::functions::utflen::utflen;
9use crate::records::lua_l_reg::LuaLReg;
10use crate::type_aliases::lua_state::lua_State;
11
12struct SyncLuaLReg([LuaLReg; 6]);
13unsafe impl Sync for SyncLuaLReg {}
14
15static FUNCS: SyncLuaLReg = SyncLuaLReg([
16    LuaLReg {
17        name: c"offset".as_ptr(),
18        func: Some(byteoffset),
19    },
20    LuaLReg {
21        name: c"codepoint".as_ptr(),
22        func: Some(codepoint),
23    },
24    LuaLReg {
25        name: c"char".as_ptr(),
26        func: Some(utfchar),
27    },
28    LuaLReg {
29        name: c"len".as_ptr(),
30        func: Some(utflen),
31    },
32    LuaLReg {
33        name: c"codes".as_ptr(),
34        func: Some(iter_codes),
35    },
36    LuaLReg {
37        name: core::ptr::null(),
38        func: None,
39    },
40]);
41
42pub unsafe fn luaopen_utf_8(L: *mut lua_State) -> core::ffi::c_int {
43    lua_l_register(L, c"utf8".as_ptr(), FUNCS.0.as_ptr());
44
45    // UTF8PATT = "[\0-\x7F\xC2-\xF4][\x80-\xBF]*" — contains an embedded NUL, so a
46    // byte slice (not a C string literal). 14 bytes, pushed via lua_pushlstring.
47    const UTF8_PATT: [u8; 14] = [
48        0x5B, 0x00, 0x2D, 0x7F, 0xC2, 0x2D, 0xF4, 0x5D, 0x5B, 0x80, 0x2D, 0xBF, 0x5D, 0x2A,
49    ];
50    lua_pushlstring(
51        L,
52        UTF8_PATT.as_ptr() as *const core::ffi::c_char,
53        UTF8_PATT.len(),
54    );
55    lua_setfield(L, -2, c"charpattern".as_ptr());
56
57    1
58}
luaur_vm/functions/luaopen_utf_8.rs

luaur_vm/functions/
luaopen_utf_8.rs
