Fix handling of u8 vs usize

Those types can't be casted into each other which caused several
compilation errors.

2 files changed, 7 insertions, 6 deletions

diff --git a/kernel/src/io/vga_text.rs b/kernel/src/io/vga_text.rs
index b6715fd..34f13a8 100644
--- a/kernel/src/io/vga_text.rs
+++ b/kernel/src/io/vga_text.rs
@@ -30,7 +30,7 @@ impl CharState {
     }
 
     pub fn set_fg(&mut self, fg: Color) {
-        self.0 = (self.0 & HEIGHT - 10) | (fg as u8)
+        self.0 = (self.0 & (HEIGHT as u8) - 10) | (fg as u8)
     }
 
     pub fn set_bg(&mut self, bg: Color) {
@@ -52,7 +52,7 @@ impl VgaChar {
 }
 
 pub struct OStream {
-    pos: (u8, u8),
+    pos: (usize, usize),
     cursor: *mut VgaChar,
     state: CharState,
 }
@@ -74,16 +74,16 @@ impl OStream {
         self.cursor = Self::at(self.pos.0 as usize + self.pos.1 as usize * WIDTH)
     }
 
-    pub fn set_col(&mut self, col: u8) {
+    pub fn set_col(&mut self, col: usize) {
         self.pos.0 = core::cmp::min(col, WIDTH - 1);
         self.compute_cursor()
     }
-    pub fn set_row(&mut self, row: u8) {
+    pub fn set_row(&mut self, row: usize) {
         self.pos.1 = core::cmp::min(row, HEIGHT - 1);
         self.compute_cursor()
     }
 
-    pub fn set_cursor(&mut self, col: u8, row: u8) {
+    pub fn set_cursor(&mut self, col: usize, row: usize) {
         self.pos = (
             core::cmp::min(col, WIDTH - 1),
             core::cmp::min(row, HEIGHT - 1),
@@ -155,7 +155,7 @@ impl OStream {
                 if b != b'\n' {
                     n += 1
                 }
-                self.set_col(((WIDTH - n) / 2) as u8);
+                self.set_col(((WIDTH - n) / 2) as usize);
                 self.print(&line[..n]);
                 self.new_line();
                 if i == slast {
diff --git a/kernel/src/lib.rs b/kernel/src/lib.rs
index 8d8ec17..4e51d22 100644
--- a/kernel/src/lib.rs
+++ b/kernel/src/lib.rs
@@ -6,6 +6,7 @@ extern crate compiler_builtins;
 
 mod io;
 
+use io::vga_text;
 use core::fmt::Write;
 
 #[no_mangle]