Minor refactor

Makefile

@@ -32,4 +32,3 @@ clean:
 
 kernel.dis : kernel.bin
 	ndisasm -b 32 $< > $@
-

src/kernel/lib/vga.c

@@ -3,20 +3,44 @@
 // VGA base address: 0xb8000
 // Charpos = 0xb8000 + 2(row*80 + col)
 
+// Screen Dimensions
+#define WIDTH 640
+#define HEIGHT 480
+
+// Memory
 #define VIDEO_MEM (char*)0xb8000
-#define GET_INDEX(s, c) (int)(c-s)
-static int cursor_y = 0;
 
-char* get_cursor_pos(unsigned int col, unsigned int row) { 
+// Global
+static int cursor_row = 0;
+
+/*
+	VGA & Memory Functions
+*/
+char* get_vga_memory_pointer(unsigned int col, unsigned int row) { 
 	return (char*)(VIDEO_MEM + 2*((row*80) + col)); 
 }
 
+void putc(char c, unsigned int col, unsigned int row) {
+	*get_vga_memory_pointer(col, row) = c;
+}
+
+/*
+	Graphics Functions
+*/
+void clear_screen(unsigned int width = 640, unsigned int height = 480) {
+	
+}
+
+
+/*
+	General Printing Functions
+*/
 void print(char* str, unsigned int str_len) {
 	for( char* c = str; *c != '\0'; c++ ) 
-		*get_cursor_pos( GET_INDEX(str, c), cursor_y ) = *c;
+		putc(*c, (int)(c - str), cursor_row);
 }
 
 void println(char* str, unsigned int str_len) {
 	print(str, str_len);
-	cursor_y++; // Increment to next y-pos (newline)
+	cursor_row++; // Increment to next y-pos (newline)
 }