Figure out how to make that extension module work.

ewext/Cargo.lock

@@ -0,0 +1,90 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "ewext"
+version = "0.1.0"
+dependencies = [
+ "libloading",
+]
+
+[[package]]
+name = "libloading"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4979f22fdb869068da03c9f7528f8297c6fd2606bc3a4affe42e6a823fdb8da4"
+dependencies = [
+ "cfg-if",
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
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+checksum = "9b724f72796e036ab90c1021d4780d4d3d648aca59e491e6b98e725b84e99973"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_gnullvm",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
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+
+[[package]]
+name = "windows_aarch64_msvc"
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+checksum = "09ec2a7bb152e2252b53fa7803150007879548bc709c039df7627cabbd05d469"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e9b5ad5ab802e97eb8e295ac6720e509ee4c243f69d781394014ebfe8bbfa0b"
+
+[[package]]
+name = "windows_i686_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0eee52d38c090b3caa76c563b86c3a4bd71ef1a819287c19d586d7334ae8ed66"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "240948bc05c5e7c6dabba28bf89d89ffce3e303022809e73deaefe4f6ec56c66"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "147a5c80aabfbf0c7d901cb5895d1de30ef2907eb21fbbab29ca94c5b08b1a78"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24d5b23dc417412679681396f2b49f3de8c1473deb516bd34410872eff51ed0d"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589f6da84c646204747d1270a2a5661ea66ed1cced2631d546fdfb155959f9ec"

ewext/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "ewext"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+crate-type = ["cdylib"]
+
+
+[profile.release]
+#lto = "thin"
+
+[dependencies]
+libloading = "0.8.5"

ewext/build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    // println!("cargo::rustc-link-lib=raw-dylib=lua");
+}

ewext/src/lib.rs

@@ -0,0 +1,28 @@
+use std::{ffi::c_int, sync::LazyLock};
+
+use lua_bindings::{lua_State, Lua51, LUA_GLOBALSINDEX};
+
+mod lua_bindings;
+
+static LUA: LazyLock<Lua51> = LazyLock::new(|| unsafe {
+    let lib = libloading::Library::new("./lua51.dll").expect("library to exist");
+    Lua51::from_library(lib).expect("library to be lua")
+});
+
+// const EWEXT: [(&'static str, Function); 1] = [("testfn", None)];
+
+extern "C" fn test_fn(lua: *mut lua_State) -> c_int {
+    0
+}
+
+#[no_mangle]
+pub extern "C" fn luaopen_ewext(lua: *mut lua_State) -> c_int {
+    println!("Initializing ewext");
+    unsafe {
+        LUA.lua_pushcclosure(lua, Some(test_fn), 0);
+        LUA.lua_setfield(lua, LUA_GLOBALSINDEX, c"ewext".as_ptr())
+    }
+    // let mut luastate = unsafe { State::from_ptr(luastateptr) };
+    // luastate.new_lib(&EWEXT);
+    1
+}