Added vsprintf support for serial connections

1 files changed, 29 insertions, 0 deletions

diff --git a/src/kernel/lib/stdlib/itoa.c b/src/kernel/lib/stdlib/itoa.c
index 2020ca6..2d2243a 100644
--- a/src/kernel/lib/stdlib/itoa.c
+++ b/src/kernel/lib/stdlib/itoa.c
@@ -41,4 +41,33 @@ char *itoa(int n)
 
 	strinv(ret);
 	return ret;
+}
+
+// TODO: Rename itoa_base
+char *itoa_base(int value, char *result, int base)
+{
+	if (base < 2 || base > 36) {
+		*result = '\0';
+		return result;
+	}
+
+	char *ptr = result, *ptr1 = result, tmp_char;
+	int tmp_value;
+
+	do {
+		tmp_value = value;
+		value /= base;
+		*ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz"
+			[35 + (tmp_value - value * base)];
+	} while (value);
+
+	if (tmp_value < 0)
+		*ptr++ = '-';
+	*ptr-- = '\0';
+	while (ptr1 < ptr) {
+		tmp_char = *ptr;
+		*ptr-- = *ptr1;
+		*ptr1++ = tmp_char;
+	}
+	return result;
 }
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