moved things around, still ongoing

rust/kernel/src/main.rs

@@ -1,6 +1,8 @@
 #![no_std]
 #![no_main]
 
+mod vga_buffer;
+
 static HELLO: &[u8] = b"Hello World!";
 
 #[unsafe(no_mangle)]
@@ -12,9 +14,9 @@ pub extern "C" fn _start() -> ! {
             *vga_buffer.offset(i as isize * 2 + 1) = 0xb;
         }
     }
-
     loop {}
 }
+
 #[panic_handler]
 fn panic(_info: &core::panic::PanicInfo) -> ! {
     loop {}

rust/kernel/src/vga_buffer.rs

@@ -0,0 +1,67 @@
+#[allow(dead_code)]
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[repr(u8)]
+pub enum Color {
+    Black = 0,
+    Blue = 1,
+    Green = 2,
+    Cyan = 3,
+    Red = 4,
+    Magenta = 5,
+    Brown = 6,
+    LightGray = 7,
+    DarkGray = 8,
+    LightBlue = 9,
+    LightGreen = 10,
+    LightCyan = 11,
+    LightRed = 12,
+    Pink = 13,
+    Yellow = 14,
+    White = 15,
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[repr(transparent)]
+struct ColorCode(u8);
+
+impl ColorCode {
+    fn new(foreground: Color, background: Color) -> ColorCode {
+        ColorCode((background as u8) << 4 | (foreground as u8))
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+#[repr(C)]
+struct TerminalChar {
+    ascii_char: u8,
+    color_code: ColorCode,
+}
+
+const BUFFER_HEIGHT: usize = 25;
+const BUFFER_WIDTH: usize = 80;
+
+#[repr(transparent)]
+struct Buffer {
+    chars: [[TerminalChar; BUFFER_WIDTH]; BUFFER_HEIGHT],
+}
+
+pub struct Writer {
+    column_position: usize,
+    color_code: ColorCode,
+    buffer: &'static mut Buffer,
+}
+
+impl Writer {
+    fn write_byte(&mut self, data: u8) {
+        if self.column_position + 1 < BUFFER_WIDTH {
+            let terminal_char = TerminalChar {
+                ascii_char: data,
+                color_code: self.color_code,
+            };
+            self.buffer.chars[BUFFER_HEIGHT - 1][self.column_position + 1] = terminal_char;
+            self.column_position += 1;
+        }
+    }
+}
+
+pub fn write_string(data: &str) {}