Test the vga buffer module through a print_something function

src/main.rs

@@ -3,20 +3,11 @@
 
 use core::panic::PanicInfo;
 
-static HELLO: &[u8] = b"Hello World!";
-
 mod vga_buffer;
 
 #[no_mangle]
 pub extern "C" fn _start() -> ! {
-    let vga_buffer = 0xb8000 as *mut u8;
+    vga_buffer::print_something();
-
-    for (i, &byte) in HELLO.iter().enumerate() {
-        unsafe {
-            *vga_buffer.offset(i as isize * 2) = byte;
-            *vga_buffer.offset(i as isize * 2 + 1) = 0xb;
-        }
-    }
 
     loop {}
 }

src/vga_buffer.rs

@@ -85,3 +85,15 @@ impl Writer {
 
     fn new_line(&mut self) {/* TODO */}
 }
+
+pub fn print_something() {
+    let mut writer = Writer {
+        column_position: 0,
+        color_code: ColorCode::new(Color::Yellow, Color::Black),
+        buffer: unsafe { &mut *(0xb8000 as *mut Buffer) },
+    };
+
+    writer.write_byte(b'H');
+    writer.write_string("ello ");
+    writer.write_string("Wörld!");
+}