rework lib

Cargo.lock

@@ -2,6 +2,12 @@
 # It is not intended for manual editing.
 version = 4
 
+[[package]]
+name = "cfg-if"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801"
+
 [[package]]
 name = "connect_demo"
 version = "0.0.0"
@@ -9,6 +15,25 @@ dependencies = [
  "open_wrapper",
 ]
 
+[[package]]
+name = "libloading"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "754ca22de805bb5744484a5b151a9e1a8e837d5dc232c2d7d8c2e3492edc8b60"
+dependencies = [
+ "cfg-if",
+ "windows-link",
+]
+
 [[package]]
 name = "open_wrapper"
 version = "0.1.0"
+dependencies = [
+ "libloading",
+]
+
+[[package]]
+name = "windows-link"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"

open_wrapper/Cargo.toml

@@ -2,4 +2,7 @@
 name = "open_wrapper"
 version = "0.1.0"
 edition.workspace = true
-build = "build.rs"
+
+
+[dependencies]
+libloading = "0.9.0"

open_wrapper/build.rs

@@ -1,20 +0,0 @@
-use std::{env, path::PathBuf};
-
-fn main() {
-    let manifest_dir =
-        PathBuf::from(env::var("CARGO_MANIFEST_DIR").expect("CARGO_MANIFEST_DIR must be set"));
-    let lib_dir = manifest_dir.join("lib");
-
-    println!("cargo:rustc-link-search=native={}", lib_dir.display());
-    println!("cargo:rerun-if-changed=build.rs");
-
-    let open_lib = lib_dir.join("open.lib");
-    if open_lib.exists() {
-        println!("cargo:rerun-if-changed={}", open_lib.display());
-    } else {
-        println!(
-            "cargo:warning=Expected to find open.lib in '{}'. Copy the vendor import library there.",
-            lib_dir.display()
-        );
-    }
-}

src/main.rs

@@ -1,108 +1,30 @@
-use std::io::{ self, Write };
+use std::{ env, path::PathBuf, process };
 
-use open_wrapper::{ self, OpenReturnCodes };
+use open_wrapper::OpenApi;
 
 fn main() {
-    println!("Rust connect demo for open.dll");
+    let dll_path = env
-    println!("(make sure open.dll is discoverable and open.lib is linked)\n");
+        ::args_os()
-    print_menu();
+        .nth(1)
+        .map(PathBuf::from)
+        .unwrap_or_else(|| PathBuf::from("open_wrapper/lib/open.dll"));
 
-    let stdin = io::stdin();
+    println!("Loading Open API from '{}'", dll_path.display());
-    let mut state = ConnectionState::default();
+    let api = match (unsafe { OpenApi::load(&dll_path) }) {
+        Ok(api) => api,
+        Err(err) => {
+            eprintln!("Failed to load '{}': {err}", dll_path.display());
+            process::exit(1);
+        }
+    };
 
-    loop {
+    println!("Calling connect() ...");
-        print!("> ");
+    let rc = unsafe { api.connect() };
-        if io::stdout().flush().is_err() {
-            eprintln!("Failed to flush stdout.");
-            break;
-        }
 
-        let mut line = String::new();
-        if stdin.read_line(&mut line).is_err() {
-            eprintln!("Failed to read input, exiting.");
-            break;
-        }
-
-        let cmd = line.trim().to_lowercase();
-        if cmd.is_empty() {
-            continue;
-        }
-
-        match cmd.as_str() {
-            "1" | "c" | "connect" => handle_connect(&mut state),
-            "2" | "d" | "disconnect" => handle_disconnect(&mut state),
-            // "3" | "g" | "get-speed" => handle_get_speed(),
-            // "4" | "r" | "realtime" => handle_set_speed(100, "SetSimulationSpeed (100%)"),
-            // "5" | "m" | "max" => handle_set_speed(u32::MAX, "SetSimulationSpeed (u32::MAX)"),
-            "h" | "help" | "?" => print_menu(),
-            "q" | "quit" | "exit" => {
-                println!("Bye!");
-                break;
-            }
-            _ => println!("Unknown command. Type `help` to see the list of commands."),
-        }
-    }
-}
-
-#[derive(Default)]
-struct ConnectionState {
-    connected: bool,
-}
-
-fn handle_connect(state: &mut ConnectionState) {
-    if state.connected {
-        println!("Already connected. Run `disconnect` first if you need a fresh session.");
-        return;
-    }
-
-    let rc = call_and_report("Connect", || unsafe { open_wrapper::connect() });
     if rc.is_ok() {
-        state.connected = true;
+        println!("connect() succeeded with status {rc:?}");
+    } else {
+        eprintln!("connect() failed with status {rc:?}");
+        process::exit(2);
     }
 }
-
-fn handle_disconnect(state: &mut ConnectionState) {
-    if !state.connected {
-        println!("Not connected yet. Use `connect` first.");
-        return;
-    }
-
-    let rc = call_and_report("Disconnect", || unsafe { open_wrapper::disconnect() });
-    if rc.is_ok() {
-        state.connected = false;
-    }
-}
-
-// fn handle_get_speed() {
-//     println!("GetSimulationSpeed called ...");
-//     let mut sim_speed = 0u32;
-//     let rc = unsafe { open_wrapper::get_simulation_speed(&mut sim_speed) };
-//     if rc.is_ok() {
-//         println!("Current simulation speed: {sim_speed}%");
-//     }
-//     println!("GetSimulationSpeed returned: {rc:?}");
-// }
-
-// fn handle_set_speed(value: u32, label: &str) {
-//     println!("{label} called ...");
-//     let rc = unsafe { open_wrapper::set_simulation_speed(value) };
-//     println!("{label} returned: {rc:?}");
-// }
-
-fn call_and_report(action: &str, mut op: impl FnMut() -> OpenReturnCodes) -> OpenReturnCodes {
-    println!("{action} called ...");
-    let rc = op();
-    println!("{action} returned: {rc:?}");
-    rc
-}
-
-fn print_menu() {
-    println!("Commands:");
-    println!("  (1) connect       - connect to the running controller");
-    println!("  (2) disconnect    - disconnect the session");
-    println!("  (3) get-speed     - read the current simulation speed");
-    println!("  (4) realtime      - set speed to 100%");
-    println!("  (5) max           - set speed to u32::MAX");
-    println!("  (h) help          - show this list");
-    println!("  (q) quit          - exit the demo");
-}