.

.

src/user/bin/calc/calc.rs

@@ -51,7 +51,7 @@ impl Interpreter {
 
         let inner = self.visit(self.get_node(node.clone(), "argument")?.expect("returned none").to_owned())?;
         if let Value::Number(x) = inner {
-            return Ok(Value::Number(super::functions::run_func(function_name, x).unwrap()));
+            return Ok(Value::Number(super::functions::run_func(function_name, x).map_err(|x| Error::Other(x.to_string()))?));
         } else {
             return Err(Error::Other(String::from("function argument is not a number")))
         }
@@ -416,44 +416,25 @@ fn calculate_inner(mut equation: String) -> Result<f64, Error> {
 	let mut neweq = equation.clone();
 	neweq.pop();
 
-
     let tokens = tokenise(&equation)?;
-
     let mut parser = Parser::new(tokens)?;
     let ast = parser.parse()?;
-
-
     let mut interpreter = Interpreter::new()?;
     let result = interpreter.visit(ast)?;
+	let return_res = if let Value::Number(x) = result {
+        x
+	} else { panic!("the value returned was not a float! THIS IS A BUG") };
 
-	let return_res = {
-		if let Value::Number(x) = result {
-			x
-		} else {
-			panic!("did not return a float!");
-		}
-	};
-	println!("\n\n
-   _____                _        _
-  / ____|              | |      | |
- | |     _ __ _   _ ___| |_ __ _| |
- | |    | '__| | | / __| __/ _` | |
- | |____| |  | |_| \\__ \\ || (_| | |
-  \\_____|_|   \\__, |___/\\__\\__,_|_|
-        _____  __/ |
-       / ____||___/ |
-      | |     __ _| | ___
-      | |    / _` | |/ __|
-      | |___| (_| | | (__
-       \\_____\\__,_|_|\\___|
+	println!("
+
+    [ EXPRESSION ]
+
+    {}
+
+    [ RESULT ]
+
+    {}
 
-    ┌────────────────────────────────────────────┐
-    │                                            │
-    │    Expression -> [ {} ]
-    │                                            │
-    │    Calculated Solution -> [ {} ]
-    │                                            │
-    └────────────────────────────────────────────┘
     ", neweq, return_res);
 
     Ok(return_res)
@@ -481,6 +462,7 @@ fn tokenise(equation: &str) -> Result<Vec<Token>, Error> {
                     tokens.push(Token::Func(current_string.clone()));
                 }
                 is_var = false;
+                current_string = "".to_string();
             }
         }
 

src/user/bin/calc/functions.rs

@@ -3,11 +3,13 @@ use alloc::string::String;
 use crate::println;
 
 pub fn run_func(func: String, x: f64) -> Result<f64, String> {
-    println!("function being run: {}({})", func, x);
-
     match func.as_str() {
         "sqrt" => sqrt(x),
         "ln" => ln(x),
+        "fact" => factorial(x),
+        "sin" => sin(x),
+        "cos" => cos(x),
+        "tan" => tan(x),
         _ => Err(String::from(format!("unrecognised function name: {}", func))),
     }
 }
@@ -24,4 +26,24 @@ fn ln(x: f64) -> Result<f64, String> {
         return Err(String::from("Cannot take the natural log of a negative number"));
     }
     Ok(libm::log(x))
+}
+
+fn factorial(x: f64) -> Result<f64, String> {
+    if x < 0.0 {
+        return Err(String::from("Cannot take the factorial of a negative number"));
+    }
+    let x = x as u64;
+    Ok((1..=x).fold(1, |a, b| a * b) as f64)
+}
+
+fn sin(x: f64) -> Result<f64, String> {
+    Ok(libm::sin(x))
+}
+
+fn cos(x: f64) -> Result<f64, String> {
+    Ok(libm::cos(x))
+}
+
+fn tan(x: f64) -> Result<f64, String> {
+    Ok(libm::tan(x))
 }

src/user/bin/crystalfetch.rs

@@ -1,12 +1,40 @@
 use async_trait::async_trait;
-use alloc::{boxed::Box, string::String, vec::Vec};
+use alloc::{boxed::Box, format, string::String, vec::Vec};
+use log::info;
 
 use crate::{std::os::OS, std::io::{Color, write, clear}, println, std::application::{
 	Application,
 	Error,
 }, std};
 
+const CRYSTAL_LOGO: &str =
+" $$$$$$\\                              $$\\             $$\\ $$$$$$\\  $$$$$$\\
+$$  __$$\\                             $$ |            $$ $$  __$$\\$$  __$$\\
+$$ /  \\__|$$$$$$\\ $$\\   $$\\ $$$$$$$\\$$$$$$\\   $$$$$$\\ $$ $$ /  $$ $$ /  \\__|
+$$ |     $$  __$$\\$$ |  $$ $$  _____\\_$$  _|  \\____$$\\$$ $$ |  $$ \\$$$$$$\\
+$$ |     $$ |  \\__$$ |  $$ \\$$$$$$\\   $$ |    $$$$$$$ $$ $$ |  $$ |\\____$$\\
+$$ |  $$\\$$ |     $$ |  $$ |\\____$$\\  $$ |$$\\$$  __$$ $$ $$ |  $$ $$\\   $$ |
+\\$$$$$$  $$ |     \\$$$$$$$ $$$$$$$  | \\$$$$  \\$$$$$$$ $$ |$$$$$$  \\$$$$$$  |
+ \\______/\\__|      \\____$$ \\_______/   \\$$$$$$\\_______\\__|\\______/ \\______/
+                  $$\\   $$ |           $$  __$$\\
+                  \\$$$$$$  |  $$\\    $$\\__/  $$ |
+                   \\______/   \\$$\\  $$  $$$$$$  |
+                               \\$$\\$$  $$  ____/
+                                \\$$$  /$$ |
+                                 \\$  / $$$$$$$$\\
+                                  \\_/  \\________|                           ";
 
+const ZXQ5_LOGO: &str = "
+
+    /$$$$$$$$ /$$   /$$  /$$$$$$   /$$$$$$   /$$$$$$                     /$$
+   |_____ $$ | $$  / $$ /$$__  $$ /$$__  $$ /$$__  $$                  /$$$$
+        /$$/ |  $$/ $$/| $$  \\ $$| $$  \\ $$| $$  \\__/       /$$    /$$|_  $$
+       /$$/   \\  $$$$/ | $$  | $$| $$  | $$|  $$$$$$       |  $$  /$$/  | $$
+      /$$/     >$$  $$ | $$  | $$| $$  | $$ \\____  $$       \\  $$/$$/   | $$
+     /$$/     /$$/\\  $$| $$/$$ $$| $$  | $$ /$$  \\ $$        \\  $$$/    | $$
+    /$$$$$$$$| $$  \\ $$|  $$$$$$/|  $$$$$$/|  $$$$$$/         \\  $/    /$$$$$$
+   |________/|__/  |__/ \\____ $$$ \\______/  \\______/           \\_/    |______/
+";
 pub struct CrystalFetch {}
 
 #[async_trait]
@@ -23,29 +51,23 @@ impl Application for CrystalFetch {
 
 		clear();
 
-		write(format_args!("
-    /$$$$$$$$ /$$   /$$  /$$$$$$   /$$$$$$   /$$$$$$                     /$$
-   |_____ $$ | $$  / $$ /$$__  $$ /$$__  $$ /$$__  $$                  /$$$$
-        /$$/ |  $$/ $$/| $$  \\ $$| $$  \\ $$| $$  \\__/       /$$    /$$|_  $$
-       /$$/   \\  $$$$/ | $$  | $$| $$  | $$|  $$$$$$       |  $$  /$$/  | $$
-      /$$/     >$$  $$ | $$  | $$| $$  | $$ \\____  $$       \\  $$/$$/   | $$
-     /$$/     /$$/\\  $$| $$/$$ $$| $$  | $$ /$$  \\ $$        \\  $$$/    | $$
-    /$$$$$$$$| $$  \\ $$|  $$$$$$/|  $$$$$$/|  $$$$$$/         \\  $/    /$$$$$$
-   |________/|__/  |__/ \\____ $$$ \\______/  \\______/           \\_/    |______/
-"), (Color::Cyan, Color::Black));
-		println!("
-
-
- [   OS      »  {}
+		let logo_string = CRYSTAL_LOGO;
+		let info_string = format!(
+" [   OS      »  {}
  [   BUILD   »  {}
  [   Shell   »  CrySH
  [   Github  »  https://github.com/FantasyPvP/CrystalOS-Restructured
- [   Author  »  FantasyPvP / ZXQ5
+ [   Author  »  FantasyPvP / ZXQ5", os, version);
+
+		let spacer = "\n".repeat(24 - logo_string.lines().count() - 4 - info_string.lines().count());
+
+		// write values to console
+		write(format_args!("{}", logo_string), (Color::Cyan, Color::Black));
+		println!("\n\n");
+		println!("{}", info_string);
+		println!("{}", spacer);
 
 
-
-
-", os, version);
 		Ok(())
 	}
 

src/user/bin/shell.rs

@@ -14,6 +14,7 @@ use crate::{
     std::application::{Application, Error},
     user::bin::*,
 };
+use crate::std::io::{Color, write};
 use crate::user::bin::gigachad_detector::GigachadDetector;
 
 lazy_static! {
@@ -54,7 +55,9 @@ pub async fn eventloop() {
     }
 }
 
-fn handle_error(e: Error) {}
+fn handle_error(e: Error) {
+    println!("there was an error! exiting program!");
+}
 
 async fn exec() -> Result<(), Error> {
     let mut current = CMD.lock().current.clone();
@@ -189,11 +192,8 @@ impl CommandHandler {
     // TODO: coloured prompt
 
     pub fn prompt(&self) {
-        print!("\n [ Crystal ] >> ");
+        write(format_args!("\n Crystal> "), (Color::Cyan, Color::Black));
     }
-
-    // this function is run every time the enter key is pressed in the command line mode.
-    // it detects the command that is being run and then executes it, passing the arguments to it.
 }
 
 struct CmdHistory {