...

src/kernel.c

@@ -1,21 +1,67 @@
 #include "kernel.h"
 #include "interrupts.h"
+#include "string.h"
 #include "vga.h"
+#include <stdarg.h>
+#include <stddef.h>
 
-void kernel_main()
+void kmain()
 {
     vga_clear();
 
     pic_remap();
     enable_interrupts();
 
-    vga_print("\nWelcome to nub OS\n");
+    kprintf("\nWelcome to nub OS\n");
 
-    kernel_halt();
+    khalt();
 }
 
-void kernel_panic()
+void kpanic()
 {
-    vga_print("Kernel panic!\n");
-    kernel_halt();
+    kprintf("Kernel panic!\n");
+    khalt();
+}
+
+void kprintf(const char* fmt, ...)
+{
+    va_list args;
+    va_start(args, fmt);
+
+    for (size_t i = 0; fmt[i] != '\0'; i++)
+    {
+        if (fmt[i] == '%')
+        {
+            i++;
+            if (fmt[i] == 's')
+            {
+                const char* str = va_arg(args, const char*);
+                for (size_t j = 0; str[j] != '\0'; j++)
+                {
+                    vga_put_char(str[j], 0x0F);
+                }
+            }
+            else if (fmt[i] == 'd')
+            {
+                int val = va_arg(args, int);
+                char buf[12];
+                itoa(val, buf);
+                for (size_t j = 0; buf[j] != '\0'; j++)
+                {
+                    vga_put_char(buf[j], 0x0F);
+                }
+            }
+            else
+            {
+                vga_put_char('%', 0x0F);
+                vga_put_char(fmt[i], 0x0F);
+            }
+        }
+        else
+        {
+            vga_put_char(fmt[i], 0x0F);
+        }
+    }
+
+    va_end(args);
 }