Add runtime module

src/main.rs

@@ -1,11 +1,16 @@
 #[macro_use] extern crate clap;
 
 use cli::Config;
+use runtime::Runtime;
 
 mod cli;
+mod runtime;
 
 fn main() {
     let mut config = Config::new();
     cli::configure(&mut config);
+
+    let rt = Runtime::new(config);
+
     println!("Hello, world!");
 }

src/runtime.rs

@@ -0,0 +1,42 @@
+use cli::Config;
+
+use std::io::stderr;
+use std::io::Write;
+
+pub struct Runtime {
+    config : Config,
+}
+
+impl Runtime {
+
+    pub fn new(config : Config) -> Runtime {
+        Runtime {
+            config: config,
+        }
+    }
+
+    pub fn debug(&self, string : String) {
+        if self.config.is_debugging() {
+            println!("{}", string);
+        }
+    }
+
+    pub fn print(&self, string : String) {
+        if self.config.is_verbose() || self.config.is_debugging() {
+            println!("{}", string);
+        }
+    }
+
+    pub fn trace(string : String) {
+        // writeln!(&mut stderr, "{}", string);
+    }
+
+    pub fn is_verbose(&self) -> bool {
+        self.config.is_verbose()
+    }
+
+    pub fn is_debugging(&self) -> bool {
+        self.config.is_debugging()
+    }
+
+}