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Faster lua_rotate for Lua < 5.3

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Alex Orlenko 2022-04-17 01:02:40 +01:00
parent dba76f3994
commit 3904213ed0
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GPG key ID: 4C150C250863B96D
3 changed files with 21 additions and 0 deletions
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7
src/ffi/lua51/compat.rs
View file

@ -155,6 +155,13 @@ pub unsafe fn lua_absindex(L: *mut lua_State, mut idx: c_int) -> c_int {
pub unsafe fn lua_rotate(L: *mut lua_State, mut idx: c_int, mut n: c_int) {
idx = lua_absindex(L, idx);
if n > 0 {
// Faster version
for _ in 0..n {
lua_insert(L, idx);
}
return;
}
let n_elems = lua_gettop(L) - idx + 1;
if n < 0 {
n += n_elems;

7
src/ffi/lua52/compat.rs
View file

@ -27,6 +27,13 @@ unsafe fn compat53_reverse(L: *mut lua_State, mut a: c_int, mut b: c_int) {
pub unsafe fn lua_rotate(L: *mut lua_State, mut idx: c_int, mut n: c_int) {
idx = lua_absindex(L, idx);
if n > 0 {
// Faster version
for _ in 0..n {
lua_insert(L, idx);
}
return;
}
let n_elems = lua_gettop(L) - idx + 1;
if n < 0 {
n += n_elems;

7
src/ffi/luau/compat.rs
View file

@ -90,6 +90,13 @@ unsafe fn compat53_pushfuncname(L: *mut lua_State, level: c_int, ar: *mut lua_De
pub unsafe fn lua_rotate(L: *mut lua_State, mut idx: c_int, mut n: c_int) {
idx = lua_absindex(L, idx);
if n > 0 {
// Faster version
for _ in 0..n {
lua_insert(L, idx);
}
return;
}
let n_elems = lua_gettop(L) - idx + 1;
if n < 0 {
n += n_elems;