Improve experimental/debug.h with many helper macros (KnightOS#24)

* Improve experimental/debug.h with many helper macros

This is very useful for displaying error/debug messages to the developper.

include/experimental/debug.h

@@ -3,4 +3,46 @@
 
 #define BREAKPOINT __asm jr $ __endasm;
 
-#endif
+#include <string.h>
+#include <knightos/display.h>
+
+#define __DEFAULT_DEBUG_TIMEOUT 150
+
+#ifndef KCC_DISABLE_DEBUG
+
+#define debug_hinted(/* SCREEN* */ screen, msg, /* char* */ hint, /* int */ timeout, /* void(SCREEN*, unsigned char, unsigned char, msg) */ draw_func) \
+{ \
+    unsigned short i = 0; \
+    const unsigned char* bug_msg = hint; \
+    const unsigned short bug_msg_len = strlen(bug_msg); \
+    const unsigned short space = (bug_msg_len != 0) ? 4 : 0; \
+    screen_clear(screen); \
+    draw_string(screen, 2, 2, "L. "); \
+    draw_short(screen, 2+3*4, 2, __LINE__); \
+    draw_string(screen, 2, 8*7, __FILE__); \
+    draw_string(screen, 2, 8*1, hint);\
+    /* the size of a single character is 4 pixel */ \
+    draw_func(screen, 2+bug_msg_len*4+space, 8*1, msg); \
+    for(i=0; i<TIMEOUT;i++){ \
+        draw_rectangle(screen, 8, 60, 8*6, 0, GFX_AND); \
+        draw_short(screen, 2, 8*6, TIMEOUT-i); \
+        screen_draw(screen); \
+    } \
+    screen_clear(screen); \
+}
+
+#else
+
+#define debug_hinted(/* SCREEN* */ screen, msg, /* char* */ hint, /* int */ timeout, /* void(SCREEN*, unsigned char, unsigned char, msg) */ draw_func)
+
+#endif
+
+#define debug(screen, msg, draw_func) debug_hinted(screen, msg, "", __DEFAULT_DEBUG_TIMEOUT, draw_func)
+
+#define debug_str(screen, msg) debug_hinted(screen, msg, "str:", __DEFAULT_DEBUG_TIMEOUT, draw_string)
+#define debug_short(screen, msg) debug_hinted(screen, msg, "short:", __DEFAULT_DEBUG_TIMEOUT, draw_short)
+#define debug_signed(screen, msg) debug_hinted(screen, msg, "signed:", __DEFAULT_DEBUG_TIMEOUT, draw_signed)
+#define debug_float(screen, msg) debug_hinted(screen, msg, "float:", __DEFAULT_DEBUG_TIMEOUT, draw_float)
+#define debug_float_hinted(screen, msg, hint) debug_hinted(screen, msg, hint, __DEFAULT_DEBUG_TIMEOUT, draw_float)
+
+#endif