Implemented initial printk. Added multiboot support.

lib/string.c

@@ -2,6 +2,18 @@
 
 #include <brados/string.h>
 
+// Find the first instance of c in str
+// Returns -1 if c is not found
+int strindexof(char c, const char *str)
+{
+	for (size_t i = 0; i < strlen(str); i++) {
+		if (str[i] == c)
+			return i;
+	}
+	
+	return -1;
+}
+
 // Find the length of a string
 size_t strlen(const char *str)
 {