printf: add %d, %u and %x

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/stdio/printf.c b/lib/stdio/printf.c
index f6b8ef6..269b9b6 100644
--- a/lib/stdio/printf.c
+++ b/lib/stdio/printf.c
@@ -1,8 +1,11 @@
 #include <stdarg.h>
 #include <stdio.h>
+#include <string.h>
 
 #include <devices/uart_16550.h>
 
+static char buffer[3 * sizeof(int) + 2];
+
 int
 printf(const char *restrict format, ...)
 {
@@ -22,6 +25,15 @@ printf(const char *restrict format, ...)
       case 's':
         written += uart_puts(COM1, va_arg(params, const char *), -1);
         break;
+      case 'd':
+        written += uart_puts(COM1, itoa(buffer, va_arg(params, int), 10), -1);
+        break;
+      case 'u':
+        written += uart_puts(COM1, utoa(buffer, va_arg(params, unsigned int), 10), -1);
+        break;
+      case 'x':
+        written += uart_puts(COM1, utoa(buffer, va_arg(params, unsigned int), 16), -1);
+        break;
       }
 
       l = 0;