Add: semi-working printf implementation

stdio.h

@@ -1,6 +1,8 @@
 #ifndef INCLUDE_STDIO_H
 #define INCLUDE_STDIO_H
 
+#include "stdint.h"
+
 #define FB_GREEN      2
 #define FB_DARK_GREY  8
 
@@ -19,4 +21,19 @@ unsigned int getcolor(int x, int y);
 void scroll(int lines);
 void putc(char c);
 
+#define PRINTF_STATE_START 0
+#define PRINTF_STATE_LENGTH 1
+#define PRINTF_STATE_SHORT 2
+#define PRINTF_STATE_LONG 3
+#define PRINTF_STATE_SPEC 4
+
+#define PRINTF_LENGTH_START 0
+#define PRINTF_LENGTH_SHORT_SHORT 1
+#define PRINTF_LENGTH_SHORT 2
+#define PRINTF_LENGTH_LONG 3
+#define PRINTF_LENGTH_LONG_LONG 4
+
+void printf(const char* fmt, ...);
+int* printf_number(int* argp, int length, bool sign, int radix);
+
 #endif