Implemented multiple return values

lib/log/number.q

@@ -4,13 +4,14 @@ import sys
 number(x) {
 	length := 20
 	buffer := mem.alloc(length)
-	tmp := itoa(x, buffer, length)
-	sys.write(1, tmp, buffer + length - tmp)
+	address, count := itoa(x, buffer, length)
+	sys.write(1, address, count)
 	mem.free(buffer, length)
 }
 
 itoa(x, buffer, length) {
-	tmp := buffer + length
+	end := buffer + length
+	tmp := end
 	digit := 0
 
 	loop {
@@ -19,7 +20,7 @@ itoa(x, buffer, length) {
 		tmp[0] = '0' + digit
 
 		if x == 0 {
-			return tmp
+			return tmp, end - tmp
 		}
 	}
 }