From 212b35355840ab9478e4ffc6c65323278d75a762 Mon Sep 17 00:00:00 2001
From: Skye Terran <skyeterran@gmail.com>
Date: Tue, 7 Dec 2021 18:22:06 -0800
Subject: [PATCH] init commit

---
 Cargo.toml  |   8 +++
 src/main.rs | 169 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 177 insertions(+)
 create mode 100644 Cargo.toml
 create mode 100644 src/main.rs

diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..de9783a
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "slipcode"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..a27e16a
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,169 @@
+use std::io;
+
+fn main() {
+    println!("Slipcode | Skye Terran, 2021");
+
+    let mut instructions: Vec<u8> = vec![];
+    let mut values: Vec<i32> = vec![];
+
+    loop {
+        let input = get_input();
+        let mut iter = input.iter();
+        loop {
+            let byte_opt = iter.next();
+            if byte_opt.is_some() {
+                let byte = byte_opt.unwrap();
+                instructions.push(*byte);
+            } else {
+                break;
+            }
+        }
+        execute(&mut instructions, &mut values);
+    }
+}
+
+fn get_input() -> Vec<u8> {
+    println!("\nEnter instruction:");
+    let mut input = String::new();
+    io::stdin().read_line(&mut input)
+        .expect("Couldn't read input!");
+
+    println!("\n");
+
+    input.truncate(input.len() - 2);
+    let bytes = input.as_bytes();
+
+    bytes.to_vec()
+}
+
+fn execute(instructions: &mut Vec<u8>, values: &mut Vec<i32>) {
+    debug_instructions(instructions);
+    let mut iter = instructions.iter();
+    
+    // Handle literals
+    let mut is_literal = false;
+    let mut literal = [0u8; 8];
+    let mut lit_digit = 0;
+    loop {
+        let byte_opt = iter.next();
+
+        if is_literal {
+            if byte_opt.is_some() {
+                let byte = byte_opt.unwrap();
+                // Record another of the literal's bytes
+                literal[lit_digit] = *byte;
+
+                // Continue consuming the literal
+                if lit_digit >= 7 {
+                    let num = f32::from_bits()
+                    is_literal = false;
+                } else {
+                    lit_digit += 1;
+                }
+            } else {
+                break;
+            }
+        } else {
+            if byte_opt.is_some() {
+                let byte = byte_opt.unwrap();
+                match byte {
+                    65 => add(values),
+                    75 => kill(values),
+                    76 => is_literal = true,
+                    83 => sub(values),
+                    88 => swap(values),
+                    _ => break
+                }
+            } else {
+                break;
+            }
+        }
+    }
+    instructions.clear();
+    println!("Values: {:?}", values);
+}
+
+fn debug_instructions(instructions: &Vec<u8>) {
+    let mut readable_stack: Vec<String> = Vec::new();
+    let mut iter = instructions.iter();
+    loop {
+        let mut name = "";
+        let value = iter.next();
+        if value.is_some() {
+            let byte = value.unwrap();
+            let byte_array = [*byte];
+            match byte {
+                45 => name = "MINUS",
+                46 => name = "POINT",
+                48..=57 => name = std::str::from_utf8(&byte_array).unwrap(),
+                65 => name = "ADD",
+                70 => name = "LITERAL_FLOAT",
+                73 => name = "LITERAL_INT",
+                75 => name = "KILL",
+                76 => name = "LITERAL",
+                83 => name = "SUB",
+                88 => name = "SWAP",
+                _ => name = "NULL"
+            }
+            readable_stack.push(name.to_string());
+        } else {
+            break;
+        }
+    }
+    println!("Bytes: {:?}", instructions);
+    println!("Instructions: {:?}", readable_stack);
+}
+
+fn add(values: &mut Vec<i32>) {
+    let b_opt = values.pop();
+    let a_opt = values.pop();
+    if a_opt.is_some() && b_opt.is_some() {
+        let a = a_opt.unwrap();
+        let b = b_opt.unwrap();
+        values.push(a + b);
+    } else {
+        println!("Not enough values.");
+    }
+}
+
+fn sub(values: &mut Vec<i32>) {
+    let b_opt = values.pop();
+    let a_opt = values.pop();
+    if a_opt.is_some() && b_opt.is_some() {
+        let a = a_opt.unwrap();
+        let b = b_opt.unwrap();
+        values.push(a - b);
+    } else {
+        println!("Not enough values.");
+    }
+}
+
+fn kill(values: &mut Vec<i32>) {
+    values.pop();
+}
+
+fn swap(values: &mut Vec<i32>) {
+    let b_opt = values.pop();
+    let a_opt = values.pop();
+    if a_opt.is_some() && b_opt.is_some() {
+        let a = a_opt.unwrap();
+        let b = b_opt.unwrap();
+        values.push(b);
+        values.push(a);
+    } else {
+        println!("Not enough values.");
+    }
+}
+
+// Instruction codes
+// null (0) = NULL
+// - (45) = MINUS
+// . (46) = POINT
+// 0..9 (48..57) = numbers 0..9
+// F (70) = LIT_FLOAT
+// I (73) = LIT_INT
+// A (65) = ADD
+// K (75) = KILL (removes top value from stack)
+// L (76) = LITERAL
+// S (83) = SUB
+// X (88) = SWAP (switches the order of the last two values in the stack)
\ No newline at end of file