Call a method from rust

Cargo.lock

@@ -8,9 +8,16 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "baff4b617f7df3d896f97fe922b64817f6cd9a756bb81d40f8883f2f66dcb401"
 
+[[package]]
+name = "libc"
+version = "0.2.147"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b4668fb0ea861c1df094127ac5f1da3409a82116a4ba74fca2e58ef927159bb3"
+
 [[package]]
 name = "nmsrust"
 version = "0.1.0"
 dependencies = [
  "lexopt",
+ "libc",
 ]

Cargo.toml

@@ -11,4 +11,5 @@ crate-type = ["staticlib"]
 
 [dependencies]
 lexopt = "0.3.0"
+libc = "0.2.147"
 

src/args.rs

@@ -3,15 +3,15 @@ use std::ffi::OsString;
 use lexopt::prelude::*;
 
 #[derive(Debug, Default)]
-pub struct Args {
-    version: bool,
-    clear_screen: bool,
-    foreground: Option<OsString>,
-    autodecrypt: bool,
-    mask_blanks: bool,
+pub(crate) struct Args {
+    pub(crate) version: bool,
+    pub(crate) clear_screen: bool,
+    pub(crate) foreground: Option<OsString>,
+    pub(crate) autodecrypt: bool,
+    pub(crate) mask_blanks: bool,
 }
 
-pub fn parse_arguments() -> Result<Args, lexopt::Error> {
+pub(crate) fn parse_arguments() -> Result<Args, lexopt::Error> {
     let mut parser = lexopt::Parser::from_env();
 
     let mut args = Args::default();

src/lib.rs

@@ -1,6 +1,21 @@
 mod args;
 
+use libc::{c_void, c_int};
+
+extern {
+    fn  nmseffect_set_autodecrypt(_: c_int) -> c_void;
+}
+
 #[no_mangle]
 pub extern "C" fn rust_main() {
     println!("Hello from rust");
+
+    let args = args::parse_arguments().unwrap();
+
+    if args.autodecrypt {
+        unsafe {
+            nmseffect_set_autodecrypt(1);
+        }
+    }
+    println!("{:?}", args);
 }

src/nms.c

@@ -32,9 +32,6 @@ int main(int argc, char *argv[])
 			case 'f':
 				nmseffect_set_foregroundcolor(optarg);
 				break;
-			case 'a':
-				nmseffect_set_autodecrypt(1);
-				break;
 			case 's':
 				nmseffect_set_maskblank(1);
 				break;