Handle color fully in rust

justfile

@@ -2,6 +2,19 @@ default:
     just --list
 
 
+# Build from scratch
 build:
     cargo build --release
     make nms
+
+
+# Clean all project files
+clean:
+    rm -rf obj
+    rm -rf bin
+    cargo clean
+
+
+# A sample run of the program
+sample_run *args:
+    cat Cargo.toml | ./bin/nms {{args}}

src/color.rs

@@ -0,0 +1,40 @@
+use std::{convert::TryFrom, ffi::OsString};
+
+pub(crate) enum Color {
+    Black = 0,
+    Red = 1,
+    Green = 2,
+    Yellow = 3,
+    Blue = 4,
+    Magenta = 5,
+    Cyan = 6,
+    White = 7,
+}
+
+impl Default for Color {
+    fn default() -> Self {
+        Color::Blue
+    }
+}
+
+impl TryFrom<OsString> for Color {
+    type Error = ();
+
+    fn try_from(s: OsString) -> Result<Self, ()> {
+        let s = match s.to_str() {
+            Some(s) => s,
+            None => return Err(()),
+        };
+        Ok(match s {
+            "black" => Color::Black,
+            "red" => Color::Red,
+            "green" => Color::Green,
+            "yellow" => Color::Yellow,
+            "blue" => Color::Blue,
+            "magenta" => Color::Magenta,
+            "cyan" => Color::Cyan,
+            "white" => Color::White,
+            _ => return Err(()),
+        })
+    }
+}

src/lib.rs

@@ -1,8 +1,10 @@
 mod args;
+mod color;
 
 use libc::{c_int, c_void};
+use color::Color;
 
-const VERSION: &str =  "2.0.0";
+const VERSION: &str = "2.0.0";
 
 extern "C" {
     fn nmseffect_set_autodecrypt(_: c_int) -> c_void;
@@ -15,15 +17,18 @@ pub extern "C" fn rust_main() {
     println!("Hello from rust");
 
     let args = args::parse_arguments().unwrap();
+    println!("{:?}", args);
 
     if args.version {
         println!("nms version {VERSION}");
         std::process::exit(0);
     }
 
-    if let Some(ref _color) = args.foreground {
+    if let Some(color) = args.foreground {
+        let color = Color::try_from(color).unwrap_or_default();
+        let n = color as c_int;
         unsafe {
-            foregroundColor = 5;
+            foregroundColor = n;
         }
     }
 
@@ -38,5 +43,4 @@ pub extern "C" fn rust_main() {
             nmseffect_set_autodecrypt(1);
         }
     }
-    println!("{:?}", args);
 }