add: %u, %p, %x to kprintf

src/kprint/print_int_base.c

@@ -0,0 +1,28 @@
+#include <stdint.h>
+
+#include "string.h"
+#include "terminal.h"
+
+int print_int_base(int32_t number, const char *prefix, const char *base)
+{
+	const int base_size = strlen(base);
+	uint64_t div = 1;
+	uint32_t tmp;
+	int rv = 0;
+
+	if (prefix)
+		terminal_writestring(prefix);
+	if (number < 0) {
+		rv += terminal_putchar('-');
+		tmp = -1 * number;
+	} else {
+		tmp = number;
+	}
+	while (div <= tmp / base_size)
+		div *= base_size;
+	while (div > 0) {
+		rv += terminal_putchar(base[tmp / div % base_size]);
+		div /= base_size;
+	}
+	return rv;
+}